diff options
Diffstat (limited to 'fs/cifs')
33 files changed, 4932 insertions, 1574 deletions
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig index a08306a..2075ddf 100644 --- a/fs/cifs/Kconfig +++ b/fs/cifs/Kconfig @@ -9,13 +9,14 @@ config CIFS select CRYPTO_ARC4 select CRYPTO_ECB select CRYPTO_DES + select CRYPTO_SHA256 help This is the client VFS module for the Common Internet File System (CIFS) protocol which is the successor to the Server Message Block (SMB) protocol, the native file sharing mechanism for most early PC operating systems. The CIFS protocol is fully supported by - file servers such as Windows 2000 (including Windows 2003, NT 4 - and Windows XP) as well by Samba (which provides excellent CIFS + file servers such as Windows 2000 (including Windows 2003, Windows 2008, + NT 4 and Windows XP) as well by Samba (which provides excellent CIFS server support for Linux and many other operating systems). Limited support for OS/2 and Windows ME and similar servers is provided as well. @@ -114,6 +115,13 @@ config CIFS_POSIX (such as Samba 3.10 and later) which can negotiate CIFS POSIX ACL support. If unsure, say N. +config CIFS_ACL + bool "Provide CIFS ACL support" + depends on CIFS_XATTR && KEYS + help + Allows fetching CIFS/NTFS ACL from the server. The DACL blob + is handed over to the application/caller. + config CIFS_DEBUG2 bool "Enable additional CIFS debugging routines" depends on CIFS @@ -138,21 +146,6 @@ config CIFS_DFS_UPCALL IP addresses) which is needed for implicit mounts of DFS junction points. If unsure, say N. -config CIFS_FSCACHE - bool "Provide CIFS client caching support" - depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y - help - Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data - to be cached locally on disk through the general filesystem cache - manager. If unsure, say N. - -config CIFS_ACL - bool "Provide CIFS ACL support" - depends on CIFS_XATTR && KEYS - help - Allows to fetch CIFS/NTFS ACL from the server. The DACL blob - is handed over to the application/caller. - config CIFS_NFSD_EXPORT bool "Allow nfsd to export CIFS file system (EXPERIMENTAL)" depends on CIFS && EXPERIMENTAL && BROKEN @@ -161,7 +154,7 @@ config CIFS_NFSD_EXPORT config CIFS_SMB2 bool "SMB2 network file system support (EXPERIMENTAL)" - depends on EXPERIMENTAL && INET && BROKEN + depends on CIFS && EXPERIMENTAL && INET select NLS select KEYS select FSCACHE @@ -178,3 +171,12 @@ config CIFS_SMB2 (compared to cifs) due to protocol improvements. Unless you are a developer or tester, say N. + +config CIFS_FSCACHE + bool "Provide CIFS client caching support" + depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y + help + Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data + to be cached locally on disk through the general filesystem cache + manager. If unsure, say N. + diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile index feee943..aa0d68b 100644 --- a/fs/cifs/Makefile +++ b/fs/cifs/Makefile @@ -17,4 +17,4 @@ cifs-$(CONFIG_CIFS_DFS_UPCALL) += dns_resolve.o cifs_dfs_ref.o cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o cifs-$(CONFIG_CIFS_SMB2) += smb2ops.o smb2maperror.o smb2transport.o \ - smb2misc.o smb2pdu.o smb2inode.o + smb2misc.o smb2pdu.o smb2inode.o smb2file.o diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c index 7dab9c0..53cf2aa 100644 --- a/fs/cifs/cifs_unicode.c +++ b/fs/cifs/cifs_unicode.c @@ -328,7 +328,7 @@ cifsConvertToUTF16(__le16 *target, const char *source, int srclen, } ctoUTF16_out: - return i; + return j; } #ifdef CONFIG_CIFS_SMB2 diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index 05f4dc2..2ee5c54 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -1222,7 +1222,7 @@ struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb, if (!open_file) return get_cifs_acl_by_path(cifs_sb, path, pacllen); - pntsd = get_cifs_acl_by_fid(cifs_sb, open_file->netfid, pacllen); + pntsd = get_cifs_acl_by_fid(cifs_sb, open_file->fid.netfid, pacllen); cifsFileInfo_put(open_file); return pntsd; } diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c index 6a0d741..652f505 100644 --- a/fs/cifs/cifsencrypt.c +++ b/fs/cifs/cifsencrypt.c @@ -29,6 +29,7 @@ #include "ntlmssp.h" #include <linux/ctype.h> #include <linux/random.h> +#include <linux/highmem.h> /* * Calculate and return the CIFS signature based on the mac key and SMB PDU. @@ -37,11 +38,13 @@ * the sequence number before this function is called. Also, this function * should be called with the server->srv_mutex held. */ -static int cifs_calc_signature(const struct kvec *iov, int n_vec, +static int cifs_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server, char *signature) { int i; int rc; + struct kvec *iov = rqst->rq_iov; + int n_vec = rqst->rq_nvec; if (iov == NULL || signature == NULL || server == NULL) return -EINVAL; @@ -91,6 +94,16 @@ static int cifs_calc_signature(const struct kvec *iov, int n_vec, } } + /* now hash over the rq_pages array */ + for (i = 0; i < rqst->rq_npages; i++) { + struct kvec p_iov; + + cifs_rqst_page_to_kvec(rqst, i, &p_iov); + crypto_shash_update(&server->secmech.sdescmd5->shash, + p_iov.iov_base, p_iov.iov_len); + kunmap(rqst->rq_pages[i]); + } + rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature); if (rc) cERROR(1, "%s: Could not generate md5 hash", __func__); @@ -99,12 +112,12 @@ static int cifs_calc_signature(const struct kvec *iov, int n_vec, } /* must be called with server->srv_mutex held */ -int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server, +int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server, __u32 *pexpected_response_sequence_number) { int rc = 0; char smb_signature[20]; - struct smb_hdr *cifs_pdu = (struct smb_hdr *)iov[0].iov_base; + struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base; if ((cifs_pdu == NULL) || (server == NULL)) return -EINVAL; @@ -125,7 +138,7 @@ int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server, *pexpected_response_sequence_number = server->sequence_number++; server->sequence_number++; - rc = cifs_calc_signature(iov, n_vec, server, smb_signature); + rc = cifs_calc_signature(rqst, server, smb_signature); if (rc) memset(cifs_pdu->Signature.SecuritySignature, 0, 8); else @@ -134,6 +147,15 @@ int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server, return rc; } +int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *server, + __u32 *pexpected_response_sequence) +{ + struct smb_rqst rqst = { .rq_iov = iov, + .rq_nvec = n_vec }; + + return cifs_sign_rqst(&rqst, server, pexpected_response_sequence); +} + /* must be called with server->srv_mutex held */ int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server, __u32 *pexpected_response_sequence_number) @@ -147,14 +169,14 @@ int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server, pexpected_response_sequence_number); } -int cifs_verify_signature(struct kvec *iov, unsigned int nr_iov, +int cifs_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server, __u32 expected_sequence_number) { unsigned int rc; char server_response_sig[8]; char what_we_think_sig_should_be[20]; - struct smb_hdr *cifs_pdu = (struct smb_hdr *)iov[0].iov_base; + struct smb_hdr *cifs_pdu = (struct smb_hdr *)rqst->rq_iov[0].iov_base; if (cifs_pdu == NULL || server == NULL) return -EINVAL; @@ -186,8 +208,7 @@ int cifs_verify_signature(struct kvec *iov, unsigned int nr_iov, cifs_pdu->Signature.Sequence.Reserved = 0; mutex_lock(&server->srv_mutex); - rc = cifs_calc_signature(iov, nr_iov, server, - what_we_think_sig_should_be); + rc = cifs_calc_signature(rqst, server, what_we_think_sig_should_be); mutex_unlock(&server->srv_mutex); if (rc) @@ -686,12 +707,17 @@ calc_seckey(struct cifs_ses *ses) void cifs_crypto_shash_release(struct TCP_Server_Info *server) { + if (server->secmech.hmacsha256) + crypto_free_shash(server->secmech.hmacsha256); + if (server->secmech.md5) crypto_free_shash(server->secmech.md5); if (server->secmech.hmacmd5) crypto_free_shash(server->secmech.hmacmd5); + kfree(server->secmech.sdeschmacsha256); + kfree(server->secmech.sdeschmacmd5); kfree(server->secmech.sdescmd5); @@ -716,6 +742,13 @@ cifs_crypto_shash_allocate(struct TCP_Server_Info *server) goto crypto_allocate_md5_fail; } + server->secmech.hmacsha256 = crypto_alloc_shash("hmac(sha256)", 0, 0); + if (IS_ERR(server->secmech.hmacsha256)) { + cERROR(1, "could not allocate crypto hmacsha256\n"); + rc = PTR_ERR(server->secmech.hmacsha256); + goto crypto_allocate_hmacsha256_fail; + } + size = sizeof(struct shash_desc) + crypto_shash_descsize(server->secmech.hmacmd5); server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL); @@ -727,7 +760,6 @@ cifs_crypto_shash_allocate(struct TCP_Server_Info *server) server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5; server->secmech.sdeschmacmd5->shash.flags = 0x0; - size = sizeof(struct shash_desc) + crypto_shash_descsize(server->secmech.md5); server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL); @@ -739,12 +771,29 @@ cifs_crypto_shash_allocate(struct TCP_Server_Info *server) server->secmech.sdescmd5->shash.tfm = server->secmech.md5; server->secmech.sdescmd5->shash.flags = 0x0; + size = sizeof(struct shash_desc) + + crypto_shash_descsize(server->secmech.hmacsha256); + server->secmech.sdeschmacsha256 = kmalloc(size, GFP_KERNEL); + if (!server->secmech.sdeschmacsha256) { + cERROR(1, "%s: Can't alloc hmacsha256\n", __func__); + rc = -ENOMEM; + goto crypto_allocate_hmacsha256_sdesc_fail; + } + server->secmech.sdeschmacsha256->shash.tfm = server->secmech.hmacsha256; + server->secmech.sdeschmacsha256->shash.flags = 0x0; + return 0; +crypto_allocate_hmacsha256_sdesc_fail: + kfree(server->secmech.sdescmd5); + crypto_allocate_md5_sdesc_fail: kfree(server->secmech.sdeschmacmd5); crypto_allocate_hmacmd5_sdesc_fail: + crypto_free_shash(server->secmech.hmacsha256); + +crypto_allocate_hmacsha256_fail: crypto_free_shash(server->secmech.md5); crypto_allocate_md5_fail: diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index db8a404..e7931cc 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -36,6 +36,7 @@ #include <linux/kthread.h> #include <linux/freezer.h> #include <linux/namei.h> +#include <linux/random.h> #include <net/ipv6.h> #include "cifsfs.h" #include "cifspdu.h" @@ -51,7 +52,6 @@ #ifdef CONFIG_CIFS_SMB2 #include "smb2pdu.h" #endif -#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ int cifsFYI = 0; int cifsERROR = 1; @@ -89,6 +89,10 @@ extern mempool_t *cifs_mid_poolp; struct workqueue_struct *cifsiod_wq; +#ifdef CONFIG_CIFS_SMB2 +__u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE]; +#endif + static int cifs_read_super(struct super_block *sb) { @@ -160,13 +164,12 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf) struct super_block *sb = dentry->d_sb; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); - int rc = -EOPNOTSUPP; + struct TCP_Server_Info *server = tcon->ses->server; unsigned int xid; + int rc = 0; xid = get_xid(); - buf->f_type = CIFS_MAGIC_NUMBER; - /* * PATH_MAX may be too long - it would presumably be total path, * but note that some servers (includinng Samba 3) have a shorter @@ -178,27 +181,8 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_files = 0; /* undefined */ buf->f_ffree = 0; /* unlimited */ - /* - * We could add a second check for a QFS Unix capability bit - */ - if ((tcon->ses->capabilities & CAP_UNIX) && - (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) - rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); - - /* - * Only need to call the old QFSInfo if failed on newer one, - * e.g. by OS/2. - **/ - if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) - rc = CIFSSMBQFSInfo(xid, tcon, buf); - - /* - * Some old Windows servers also do not support level 103, retry with - * older level one if old server failed the previous call or we - * bypassed it because we detected that this was an older LANMAN sess - */ - if (rc) - rc = SMBOldQFSInfo(xid, tcon, buf); + if (server->ops->queryfs) + rc = server->ops->queryfs(xid, tcon, buf); free_xid(xid); return 0; @@ -239,9 +223,10 @@ cifs_alloc_inode(struct super_block *sb) return NULL; cifs_inode->cifsAttrs = 0x20; /* default */ cifs_inode->time = 0; - /* Until the file is open and we have gotten oplock - info back from the server, can not assume caching of - file data or metadata */ + /* + * Until the file is open and we have gotten oplock info back from the + * server, can not assume caching of file data or metadata. + */ cifs_set_oplock_level(cifs_inode, 0); cifs_inode->delete_pending = false; cifs_inode->invalid_mapping = false; @@ -249,11 +234,16 @@ cifs_alloc_inode(struct super_block *sb) cifs_inode->server_eof = 0; cifs_inode->uniqueid = 0; cifs_inode->createtime = 0; - - /* Can not set i_flags here - they get immediately overwritten - to zero by the VFS */ -/* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ +#ifdef CONFIG_CIFS_SMB2 + get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE); +#endif + /* + * Can not set i_flags here - they get immediately overwritten to zero + * by the VFS. + */ + /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */ INIT_LIST_HEAD(&cifs_inode->openFileList); + INIT_LIST_HEAD(&cifs_inode->llist); return &cifs_inode->vfs_inode; } @@ -360,7 +350,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root) cifs_show_security(s, tcon->ses->server); cifs_show_cache_flavor(s, cifs_sb); - seq_printf(s, ",unc=%s", tcon->treeName); + seq_printf(s, ",unc="); + seq_escape(s, tcon->treeName, " \t\n\\"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) seq_printf(s, ",multiuser"); @@ -957,7 +948,7 @@ cifs_init_once(void *inode) struct cifsInodeInfo *cifsi = inode; inode_init_once(&cifsi->vfs_inode); - mutex_init(&cifsi->lock_mutex); + init_rwsem(&cifsi->lock_sem); } static int @@ -977,6 +968,11 @@ cifs_init_inodecache(void) static void cifs_destroy_inodecache(void) { + /* + * Make sure all delayed rcu free inodes are flushed before we + * destroy cache. + */ + rcu_barrier(); kmem_cache_destroy(cifs_inode_cachep); } @@ -1127,6 +1123,10 @@ init_cifs(void) spin_lock_init(&cifs_file_list_lock); spin_lock_init(&GlobalMid_Lock); +#ifdef CONFIG_CIFS_SMB2 + get_random_bytes(cifs_client_guid, SMB2_CLIENT_GUID_SIZE); +#endif + if (cifs_max_pending < 2) { cifs_max_pending = 2; cFYI(1, "cifs_max_pending set to min of 2"); diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 1c49c5a..7163419 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -128,5 +128,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg); extern const struct export_operations cifs_export_ops; #endif /* CONFIG_CIFS_NFSD_EXPORT */ -#define CIFS_VERSION "1.78" +#define CIFS_VERSION "2.0" #endif /* _CIFSFS_H */ diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 977dc0e..f5af252 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -32,6 +32,8 @@ #include "smb2pdu.h" #endif +#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ + /* * The sizes of various internal tables and strings */ @@ -128,8 +130,10 @@ struct sdesc { struct cifs_secmech { struct crypto_shash *hmacmd5; /* hmac-md5 hash function */ struct crypto_shash *md5; /* md5 hash function */ + struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */ struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */ struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */ + struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */ }; /* per smb session structure/fields */ @@ -158,9 +162,24 @@ struct cifs_cred { ***************************************************************** */ +/* + * A smb_rqst represents a complete request to be issued to a server. It's + * formed by a kvec array, followed by an array of pages. Page data is assumed + * to start at the beginning of the first page. + */ +struct smb_rqst { + struct kvec *rq_iov; /* array of kvecs */ + unsigned int rq_nvec; /* number of kvecs in array */ + struct page **rq_pages; /* pointer to array of page ptrs */ + unsigned int rq_npages; /* number pages in array */ + unsigned int rq_pagesz; /* page size to use */ + unsigned int rq_tailsz; /* length of last page */ +}; + enum smb_version { Smb_1 = 1, Smb_21, + Smb_30, }; struct mid_q_entry; @@ -171,17 +190,23 @@ struct cifs_tcon; struct dfs_info3_param; struct cifs_fattr; struct smb_vol; +struct cifs_fid; +struct cifs_readdata; +struct cifs_writedata; +struct cifs_io_parms; +struct cifs_search_info; +struct cifsInodeInfo; struct smb_version_operations { int (*send_cancel)(struct TCP_Server_Info *, void *, struct mid_q_entry *); bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *); /* setup request: allocate mid, sign message */ - int (*setup_request)(struct cifs_ses *, struct kvec *, unsigned int, - struct mid_q_entry **); + struct mid_q_entry *(*setup_request)(struct cifs_ses *, + struct smb_rqst *); /* setup async request: allocate mid, sign message */ - int (*setup_async_request)(struct TCP_Server_Info *, struct kvec *, - unsigned int, struct mid_q_entry **); + struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *, + struct smb_rqst *); /* check response: verify signature, map error */ int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, bool); @@ -212,6 +237,10 @@ struct smb_version_operations { bool (*need_neg)(struct TCP_Server_Info *); /* negotiate to the server */ int (*negotiate)(const unsigned int, struct cifs_ses *); + /* set negotiated write size */ + unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *); + /* set negotiated read size */ + unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *); /* setup smb sessionn */ int (*sess_setup)(const unsigned int, struct cifs_ses *, const struct nls_table *); @@ -235,10 +264,22 @@ struct smb_version_operations { int (*query_path_info)(const unsigned int, struct cifs_tcon *, struct cifs_sb_info *, const char *, FILE_ALL_INFO *, bool *); + /* query file data from the server */ + int (*query_file_info)(const unsigned int, struct cifs_tcon *, + struct cifs_fid *, FILE_ALL_INFO *); /* get server index number */ int (*get_srv_inum)(const unsigned int, struct cifs_tcon *, struct cifs_sb_info *, const char *, u64 *uniqueid, FILE_ALL_INFO *); + /* set size by path */ + int (*set_path_size)(const unsigned int, struct cifs_tcon *, + const char *, __u64, struct cifs_sb_info *, bool); + /* set size by file handle */ + int (*set_file_size)(const unsigned int, struct cifs_tcon *, + struct cifsFileInfo *, __u64, bool); + /* set attributes */ + int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, + const unsigned int); /* build a full path to the root of the mount */ char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *, struct cifs_tcon *); @@ -256,10 +297,84 @@ struct smb_version_operations { /* remove directory */ int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *, struct cifs_sb_info *); + /* unlink file */ + int (*unlink)(const unsigned int, struct cifs_tcon *, const char *, + struct cifs_sb_info *); + /* open, rename and delete file */ + int (*rename_pending_delete)(const char *, struct dentry *, + const unsigned int); + /* send rename request */ + int (*rename)(const unsigned int, struct cifs_tcon *, const char *, + const char *, struct cifs_sb_info *); + /* send create hardlink request */ + int (*create_hardlink)(const unsigned int, struct cifs_tcon *, + const char *, const char *, + struct cifs_sb_info *); + /* open a file for non-posix mounts */ + int (*open)(const unsigned int, struct cifs_tcon *, const char *, int, + int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *, + struct cifs_sb_info *); + /* set fid protocol-specific info */ + void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32); + /* close a file */ + void (*close)(const unsigned int, struct cifs_tcon *, + struct cifs_fid *); + /* send a flush request to the server */ + int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *); + /* async read from the server */ + int (*async_readv)(struct cifs_readdata *); + /* async write to the server */ + int (*async_writev)(struct cifs_writedata *); + /* sync read from the server */ + int (*sync_read)(const unsigned int, struct cifsFileInfo *, + struct cifs_io_parms *, unsigned int *, char **, + int *); + /* sync write to the server */ + int (*sync_write)(const unsigned int, struct cifsFileInfo *, + struct cifs_io_parms *, unsigned int *, struct kvec *, + unsigned long); + /* open dir, start readdir */ + int (*query_dir_first)(const unsigned int, struct cifs_tcon *, + const char *, struct cifs_sb_info *, + struct cifs_fid *, __u16, + struct cifs_search_info *); + /* continue readdir */ + int (*query_dir_next)(const unsigned int, struct cifs_tcon *, + struct cifs_fid *, + __u16, struct cifs_search_info *srch_inf); + /* close dir */ + int (*close_dir)(const unsigned int, struct cifs_tcon *, + struct cifs_fid *); + /* calculate a size of SMB message */ + unsigned int (*calc_smb_size)(void *); + /* check for STATUS_PENDING and process it in a positive case */ + bool (*is_status_pending)(char *, struct TCP_Server_Info *, int); + /* send oplock break response */ + int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *, + struct cifsInodeInfo *); + /* query remote filesystem */ + int (*queryfs)(const unsigned int, struct cifs_tcon *, + struct kstatfs *); + /* send mandatory brlock to the server */ + int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64, + __u64, __u32, int, int, bool); + /* unlock range of mandatory locks */ + int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *, + const unsigned int); + /* push brlocks from the cache to the server */ + int (*push_mand_locks)(struct cifsFileInfo *); + /* get lease key of the inode */ + void (*get_lease_key)(struct inode *, struct cifs_fid *fid); + /* set lease key of the inode */ + void (*set_lease_key)(struct inode *, struct cifs_fid *fid); + /* generate new lease key */ + void (*new_lease_key)(struct cifs_fid *fid); }; struct smb_version_values { char *version_string; + __u16 protocol_id; + __u32 req_capabilities; __u32 large_lock_type; __u32 exclusive_lock_type; __u32 shared_lock_type; @@ -496,6 +611,51 @@ get_next_mid(struct TCP_Server_Info *server) } /* + * When the server supports very large reads and writes via POSIX extensions, + * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not + * including the RFC1001 length. + * + * Note that this might make for "interesting" allocation problems during + * writeback however as we have to allocate an array of pointers for the + * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. + * + * For reads, there is a similar problem as we need to allocate an array + * of kvecs to handle the receive, though that should only need to be done + * once. + */ +#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) +#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) + +/* + * When the server doesn't allow large posix writes, only allow a rsize/wsize + * of 2^17-1 minus the size of the call header. That allows for a read or + * write up to the maximum size described by RFC1002. + */ +#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) +#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) + +/* + * The default wsize is 1M. find_get_pages seems to return a maximum of 256 + * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill + * a single wsize request with a single call. + */ +#define CIFS_DEFAULT_IOSIZE (1024 * 1024) + +/* + * Windows only supports a max of 60kb reads and 65535 byte writes. Default to + * those values when posix extensions aren't in force. In actuality here, we + * use 65536 to allow for a write that is a multiple of 4k. Most servers seem + * to be ok with the extra byte even though Windows doesn't send writes that + * are that large. + * + * Citation: + * + * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx + */ +#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) +#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) + +/* * Macros to allow the TCP_Server_Info->net field and related code to drop out * when CONFIG_NET_NS isn't set. */ @@ -559,6 +719,7 @@ struct cifs_ses { __u16 session_flags; #endif /* CONFIG_CIFS_SMB2 */ }; + /* no more than one of the following three session flags may be set */ #define CIFS_SES_NT4 1 #define CIFS_SES_OS2 2 @@ -665,6 +826,7 @@ struct cifs_tcon { u64 resource_id; /* server resource id */ struct fscache_cookie *fscache; /* cookie for share */ #endif + struct list_head pending_opens; /* list of incomplete opens */ /* BB add field for back pointer to sb struct(s)? */ }; @@ -707,6 +869,15 @@ cifs_get_tlink(struct tcon_link *tlink) /* This function is always expected to succeed */ extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb); +#define CIFS_OPLOCK_NO_CHANGE 0xfe + +struct cifs_pending_open { + struct list_head olist; + struct tcon_link *tlink; + __u8 lease_key[16]; + __u32 oplock; +}; + /* * This info hangs off the cifsFileInfo structure, pointed to by llist. * This is used to track byte stream locks on the file @@ -740,16 +911,29 @@ struct cifs_search_info { bool smallBuf:1; /* so we know which buf_release function to call */ }; +struct cifs_fid { + __u16 netfid; +#ifdef CONFIG_CIFS_SMB2 + __u64 persistent_fid; /* persist file id for smb2 */ + __u64 volatile_fid; /* volatile file id for smb2 */ + __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */ +#endif + struct cifs_pending_open *pending_open; +}; + +struct cifs_fid_locks { + struct list_head llist; + struct cifsFileInfo *cfile; /* fid that owns locks */ + struct list_head locks; /* locks held by fid above */ +}; + struct cifsFileInfo { struct list_head tlist; /* pointer to next fid owned by tcon */ struct list_head flist; /* next fid (file instance) for this inode */ - struct list_head llist; /* - * brlocks held by this fid, protected by - * lock_mutex from cifsInodeInfo structure - */ + struct cifs_fid_locks *llist; /* brlocks held by this fid */ unsigned int uid; /* allows finding which FileInfo structure */ __u32 pid; /* process id who opened file */ - __u16 netfid; /* file id from remote */ + struct cifs_fid fid; /* file id from remote */ /* BB add lock scope info here if needed */ ; /* lock scope id (0 if none) */ struct dentry *dentry; @@ -765,12 +949,60 @@ struct cifsFileInfo { struct cifs_io_parms { __u16 netfid; +#ifdef CONFIG_CIFS_SMB2 + __u64 persistent_fid; /* persist file id for smb2 */ + __u64 volatile_fid; /* volatile file id for smb2 */ +#endif __u32 pid; __u64 offset; unsigned int length; struct cifs_tcon *tcon; }; +struct cifs_readdata; + +/* asynchronous read support */ +struct cifs_readdata { + struct kref refcount; + struct list_head list; + struct completion done; + struct cifsFileInfo *cfile; + struct address_space *mapping; + __u64 offset; + unsigned int bytes; + pid_t pid; + int result; + struct work_struct work; + int (*read_into_pages)(struct TCP_Server_Info *server, + struct cifs_readdata *rdata, + unsigned int len); + struct kvec iov; + unsigned int pagesz; + unsigned int tailsz; + unsigned int nr_pages; + struct page *pages[]; +}; + +struct cifs_writedata; + +/* asynchronous write support */ +struct cifs_writedata { + struct kref refcount; + struct list_head list; + struct completion done; + enum writeback_sync_modes sync_mode; + struct work_struct work; + struct cifsFileInfo *cfile; + __u64 offset; + pid_t pid; + unsigned int bytes; + int result; + unsigned int pagesz; + unsigned int tailsz; + unsigned int nr_pages; + struct page *pages[1]; +}; + /* * Take a reference on the file private data. Must be called with * cifs_file_list_lock held. @@ -790,11 +1022,8 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file); struct cifsInodeInfo { bool can_cache_brlcks; - struct mutex lock_mutex; /* - * protect the field above and llist - * from every cifsFileInfo structure - * from openFileList - */ + struct list_head llist; /* locks helb by this inode */ + struct rw_semaphore lock_sem; /* protect the fields above */ /* BB add in lists for dirty pages i.e. write caching info for oplock */ struct list_head openFileList; __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ @@ -806,6 +1035,9 @@ struct cifsInodeInfo { u64 server_eof; /* current file size on server -- protected by i_lock */ u64 uniqueid; /* server inode number */ u64 createtime; /* creation time on server */ +#ifdef CONFIG_CIFS_SMB2 + __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */ +#endif #ifdef CONFIG_CIFS_FSCACHE struct fscache_cookie *fscache; #endif @@ -1130,7 +1362,7 @@ require use of the stronger protocol */ #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ -#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2) +#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2) #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) /* @@ -1267,7 +1499,13 @@ extern mempool_t *cifs_mid_poolp; #define SMB1_VERSION_STRING "1.0" extern struct smb_version_operations smb1_operations; extern struct smb_version_values smb1_values; +#define SMB20_VERSION_STRING "2.0" +/*extern struct smb_version_operations smb20_operations; */ /* not needed yet */ +extern struct smb_version_values smb20_values; #define SMB21_VERSION_STRING "2.1" extern struct smb_version_operations smb21_operations; extern struct smb_version_values smb21_values; +#define SMB30_VERSION_STRING "3.0" +/*extern struct smb_version_operations smb30_operations; */ /* not needed yet */ +extern struct smb_version_values smb30_values; #endif /* _CIFS_GLOB_H */ diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h index 3fb03e2..b9d59a9 100644 --- a/fs/cifs/cifspdu.h +++ b/fs/cifs/cifspdu.h @@ -2210,7 +2210,7 @@ typedef struct { /* data block encoding of response to level 263 QPathInfo */ __u8 DeletePending; __u8 Directory; __u16 Pad2; - __u64 IndexNumber; + __le64 IndexNumber; __le32 EASize; __le32 AccessFlags; __u64 IndexNumber1; diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index f1bbf83..5144e9f 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -24,6 +24,7 @@ struct statfs; struct smb_vol; +struct smb_rqst; /* ***************************************************************** @@ -35,6 +36,8 @@ extern struct smb_hdr *cifs_buf_get(void); extern void cifs_buf_release(void *); extern struct smb_hdr *cifs_small_buf_get(void); extern void cifs_small_buf_release(void *); +extern void cifs_rqst_page_to_kvec(struct smb_rqst *rqst, unsigned int idx, + struct kvec *iov); extern int smb_send(struct TCP_Server_Info *, struct smb_hdr *, unsigned int /* length */); extern unsigned int _get_xid(void); @@ -65,21 +68,22 @@ extern char *cifs_compose_mount_options(const char *sb_mountdata, extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server); extern void DeleteMidQEntry(struct mid_q_entry *midEntry); +extern void cifs_delete_mid(struct mid_q_entry *mid); extern void cifs_wake_up_task(struct mid_q_entry *mid); -extern int cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov, - unsigned int nvec, mid_receive_t *receive, - mid_callback_t *callback, void *cbdata, - const int flags); +extern int cifs_call_async(struct TCP_Server_Info *server, + struct smb_rqst *rqst, + mid_receive_t *receive, mid_callback_t *callback, + void *cbdata, const int flags); extern int SendReceive(const unsigned int /* xid */ , struct cifs_ses *, struct smb_hdr * /* input */ , struct smb_hdr * /* out */ , int * /* bytes returned */ , const int); extern int SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses, char *in_buf, int flags); -extern int cifs_setup_request(struct cifs_ses *, struct kvec *, unsigned int, - struct mid_q_entry **); -extern int cifs_setup_async_request(struct TCP_Server_Info *, struct kvec *, - unsigned int, struct mid_q_entry **); +extern struct mid_q_entry *cifs_setup_request(struct cifs_ses *, + struct smb_rqst *); +extern struct mid_q_entry *cifs_setup_async_request(struct TCP_Server_Info *, + struct smb_rqst *); extern int cifs_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, bool log_error); extern int SendReceive2(const unsigned int /* xid */ , struct cifs_ses *, @@ -99,7 +103,7 @@ extern void cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset, unsigned int bytes_written); extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, bool); extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool); -extern unsigned int smbCalcSize(struct smb_hdr *ptr); +extern unsigned int smbCalcSize(void *buf); extern int decode_negTokenInit(unsigned char *security_blob, int length, struct TCP_Server_Info *server); extern int cifs_convert_address(struct sockaddr *dst, const char *src, int len); @@ -120,10 +124,14 @@ extern u64 cifs_UnixTimeToNT(struct timespec); extern struct timespec cnvrtDosUnixTm(__le16 le_date, __le16 le_time, int offset); extern void cifs_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock); - -extern struct cifsFileInfo *cifs_new_fileinfo(__u16 fileHandle, - struct file *file, struct tcon_link *tlink, - __u32 oplock); +extern int cifs_unlock_range(struct cifsFileInfo *cfile, + struct file_lock *flock, const unsigned int xid); +extern int cifs_push_mandatory_locks(struct cifsFileInfo *cfile); + +extern struct cifsFileInfo *cifs_new_fileinfo(struct cifs_fid *fid, + struct file *file, + struct tcon_link *tlink, + __u32 oplock); extern int cifs_posix_open(char *full_path, struct inode **inode, struct super_block *sb, int mode, unsigned int f_flags, __u32 *oplock, __u16 *netfid, @@ -132,18 +140,23 @@ void cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr); extern void cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, struct cifs_sb_info *cifs_sb); +extern void cifs_dir_info_to_fattr(struct cifs_fattr *, FILE_DIRECTORY_INFO *, + struct cifs_sb_info *); extern void cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr); extern struct inode *cifs_iget(struct super_block *sb, struct cifs_fattr *fattr); -extern int cifs_get_file_info(struct file *filp); extern int cifs_get_inode_info(struct inode **inode, const char *full_path, FILE_ALL_INFO *data, struct super_block *sb, int xid, const __u16 *fid); -extern int cifs_get_file_info_unix(struct file *filp); extern int cifs_get_inode_info_unix(struct inode **pinode, const unsigned char *search_path, struct super_block *sb, unsigned int xid); +extern int cifs_set_file_info(struct inode *inode, struct iattr *attrs, + unsigned int xid, char *full_path, __u32 dosattr); +extern int cifs_rename_pending_delete(const char *full_path, + struct dentry *dentry, + const unsigned int xid); extern int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, struct inode *inode, const char *path, const __u16 *pfid); @@ -169,6 +182,17 @@ extern struct smb_vol *cifs_get_volume_info(char *mount_data, extern int cifs_mount(struct cifs_sb_info *, struct smb_vol *); extern void cifs_umount(struct cifs_sb_info *); extern void cifs_mark_open_files_invalid(struct cifs_tcon *tcon); +extern bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, + __u64 length, __u8 type, + struct cifsLockInfo **conf_lock, + bool rw_check); +extern void cifs_add_pending_open(struct cifs_fid *fid, + struct tcon_link *tlink, + struct cifs_pending_open *open); +extern void cifs_add_pending_open_locked(struct cifs_fid *fid, + struct tcon_link *tlink, + struct cifs_pending_open *open); +extern void cifs_del_pending_open(struct cifs_pending_open *open); #if IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) extern void cifs_dfs_release_automount_timer(void); @@ -179,6 +203,10 @@ extern void cifs_dfs_release_automount_timer(void); void cifs_proc_init(void); void cifs_proc_clean(void); +extern void cifs_move_llist(struct list_head *source, struct list_head *dest); +extern void cifs_free_llist(struct list_head *llist); +extern void cifs_del_lock_waiters(struct cifsLockInfo *lock); + extern int cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses); extern int cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, @@ -190,10 +218,10 @@ extern int CIFSTCon(const unsigned int xid, struct cifs_ses *ses, const struct nls_table *); extern int CIFSFindFirst(const unsigned int xid, struct cifs_tcon *tcon, - const char *searchName, const struct nls_table *nls_codepage, + const char *searchName, struct cifs_sb_info *cifs_sb, __u16 *searchHandle, __u16 search_flags, struct cifs_search_info *psrch_inf, - int map, const char dirsep); + bool msearch); extern int CIFSFindNext(const unsigned int xid, struct cifs_tcon *tcon, __u16 searchHandle, __u16 search_flags, @@ -265,13 +293,11 @@ extern int CIFSSMBSetAttrLegacy(unsigned int xid, struct cifs_tcon *tcon, const struct nls_table *nls_codepage); #endif /* possibly unneeded function */ extern int CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon, - const char *fileName, __u64 size, - bool setAllocationSizeFlag, - const struct nls_table *nls_codepage, - int remap_special_chars); + const char *file_name, __u64 size, + struct cifs_sb_info *cifs_sb, bool set_allocation); extern int CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon, - __u64 size, __u16 fileHandle, __u32 opener_pid, - bool AllocSizeFlag); + struct cifsFileInfo *cfile, __u64 size, + bool set_allocation); struct cifs_unix_set_info_args { __u64 ctime; @@ -303,22 +329,17 @@ extern int CIFSPOSIXDelFile(const unsigned int xid, struct cifs_tcon *tcon, const struct nls_table *nls_codepage, int remap_special_chars); extern int CIFSSMBDelFile(const unsigned int xid, struct cifs_tcon *tcon, - const char *name, - const struct nls_table *nls_codepage, - int remap_special_chars); + const char *name, struct cifs_sb_info *cifs_sb); extern int CIFSSMBRename(const unsigned int xid, struct cifs_tcon *tcon, - const char *fromName, const char *toName, - const struct nls_table *nls_codepage, - int remap_special_chars); + const char *from_name, const char *to_name, + struct cifs_sb_info *cifs_sb); extern int CIFSSMBRenameOpenFile(const unsigned int xid, struct cifs_tcon *tcon, int netfid, const char *target_name, const struct nls_table *nls_codepage, int remap_special_chars); -extern int CIFSCreateHardLink(const unsigned int xid, - struct cifs_tcon *tcon, - const char *fromName, const char *toName, - const struct nls_table *nls_codepage, - int remap_special_chars); +extern int CIFSCreateHardLink(const unsigned int xid, struct cifs_tcon *tcon, + const char *from_name, const char *to_name, + struct cifs_sb_info *cifs_sb); extern int CIFSUnixCreateHardLink(const unsigned int xid, struct cifs_tcon *tcon, const char *fromName, const char *toName, @@ -367,8 +388,7 @@ extern int CIFSSMBWrite(const unsigned int xid, struct cifs_io_parms *io_parms, unsigned int *nbytes, const char *buf, const char __user *ubuf, const int long_op); extern int CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms, - unsigned int *nbytes, struct kvec *iov, const int nvec, - const int long_op); + unsigned int *nbytes, struct kvec *iov, const int nvec); extern int CIFSGetSrvInodeNumber(const unsigned int xid, struct cifs_tcon *tcon, const char *search_name, __u64 *inode_number, const struct nls_table *nls_codepage, @@ -397,10 +417,12 @@ extern void sesInfoFree(struct cifs_ses *); extern struct cifs_tcon *tconInfoAlloc(void); extern void tconInfoFree(struct cifs_tcon *); -extern int cifs_sign_smb(struct smb_hdr *, struct TCP_Server_Info *, __u32 *); +extern int cifs_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server, + __u32 *pexpected_response_sequence_number); extern int cifs_sign_smbv(struct kvec *iov, int n_vec, struct TCP_Server_Info *, __u32 *); -extern int cifs_verify_signature(struct kvec *iov, unsigned int nr_iov, +extern int cifs_sign_smb(struct smb_hdr *, struct TCP_Server_Info *, __u32 *); +extern int cifs_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server, __u32 expected_sequence_number); extern int SMBNTencrypt(unsigned char *, unsigned char *, unsigned char *, @@ -462,45 +484,9 @@ extern int E_md4hash(const unsigned char *passwd, unsigned char *p16, extern int SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24); -/* asynchronous read support */ -struct cifs_readdata { - struct kref refcount; - struct list_head list; - struct completion done; - struct cifsFileInfo *cfile; - struct address_space *mapping; - __u64 offset; - unsigned int bytes; - pid_t pid; - int result; - struct list_head pages; - struct work_struct work; - int (*marshal_iov) (struct cifs_readdata *rdata, - unsigned int remaining); - unsigned int nr_iov; - struct kvec iov[1]; -}; - void cifs_readdata_release(struct kref *refcount); int cifs_async_readv(struct cifs_readdata *rdata); - -/* asynchronous write support */ -struct cifs_writedata { - struct kref refcount; - struct list_head list; - struct completion done; - enum writeback_sync_modes sync_mode; - struct work_struct work; - struct cifsFileInfo *cfile; - __u64 offset; - pid_t pid; - unsigned int bytes; - int result; - void (*marshal_iov) (struct kvec *iov, - struct cifs_writedata *wdata); - unsigned int nr_pages; - struct page *pages[1]; -}; +int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid); int cifs_async_writev(struct cifs_writedata *wdata); void cifs_writev_complete(struct work_struct *work); diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 074923c..76d0d29 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -86,32 +86,6 @@ static struct { #endif /* CONFIG_CIFS_WEAK_PW_HASH */ #endif /* CIFS_POSIX */ -#ifdef CONFIG_HIGHMEM -/* - * On arches that have high memory, kmap address space is limited. By - * serializing the kmap operations on those arches, we ensure that we don't - * end up with a bunch of threads in writeback with partially mapped page - * arrays, stuck waiting for kmap to come back. That situation prevents - * progress and can deadlock. - */ -static DEFINE_MUTEX(cifs_kmap_mutex); - -static inline void -cifs_kmap_lock(void) -{ - mutex_lock(&cifs_kmap_mutex); -} - -static inline void -cifs_kmap_unlock(void) -{ - mutex_unlock(&cifs_kmap_mutex); -} -#else /* !CONFIG_HIGHMEM */ -#define cifs_kmap_lock() do { ; } while(0) -#define cifs_kmap_unlock() do { ; } while(0) -#endif /* CONFIG_HIGHMEM */ - /* * Mark as invalid, all open files on tree connections since they * were closed when session to server was lost. @@ -751,6 +725,8 @@ CIFSSMBEcho(struct TCP_Server_Info *server) ECHO_REQ *smb; int rc = 0; struct kvec iov; + struct smb_rqst rqst = { .rq_iov = &iov, + .rq_nvec = 1 }; cFYI(1, "In echo request"); @@ -768,7 +744,7 @@ CIFSSMBEcho(struct TCP_Server_Info *server) iov.iov_base = smb; iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4; - rc = cifs_call_async(server, &iov, 1, NULL, cifs_echo_callback, + rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback, server, CIFS_ASYNC_OP | CIFS_ECHO_OP); if (rc) cFYI(1, "Echo request failed: %d", rc); @@ -902,15 +878,15 @@ PsxDelete: } int -CIFSSMBDelFile(const unsigned int xid, struct cifs_tcon *tcon, - const char *fileName, const struct nls_table *nls_codepage, - int remap) +CIFSSMBDelFile(const unsigned int xid, struct cifs_tcon *tcon, const char *name, + struct cifs_sb_info *cifs_sb) { DELETE_FILE_REQ *pSMB = NULL; DELETE_FILE_RSP *pSMBr = NULL; int rc = 0; int bytes_returned; int name_len; + int remap = cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR; DelFileRetry: rc = smb_init(SMB_COM_DELETE, 1, tcon, (void **) &pSMB, @@ -919,15 +895,15 @@ DelFileRetry: return rc; if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->fileName, fileName, - PATH_MAX, nls_codepage, remap); + name_len = cifsConvertToUTF16((__le16 *) pSMB->fileName, name, + PATH_MAX, cifs_sb->local_nls, + remap); name_len++; /* trailing null */ name_len *= 2; } else { /* BB improve check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); + name_len = strnlen(name, PATH_MAX); name_len++; /* trailing null */ - strncpy(pSMB->fileName, fileName, name_len); + strncpy(pSMB->fileName, name, name_len); } pSMB->SearchAttributes = cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM); @@ -1440,7 +1416,7 @@ cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) return 0; } -static int +int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) { int length, len; @@ -1460,10 +1436,10 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) len = min_t(unsigned int, buflen, server->vals->read_rsp_size) - HEADER_SIZE(server) + 1; - rdata->iov[0].iov_base = buf + HEADER_SIZE(server) - 1; - rdata->iov[0].iov_len = len; + rdata->iov.iov_base = buf + HEADER_SIZE(server) - 1; + rdata->iov.iov_len = len; - length = cifs_readv_from_socket(server, rdata->iov, 1, len); + length = cifs_readv_from_socket(server, &rdata->iov, 1, len); if (length < 0) return length; server->total_read += length; @@ -1509,19 +1485,19 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) len = data_offset - server->total_read; if (len > 0) { /* read any junk before data into the rest of smallbuf */ - rdata->iov[0].iov_base = buf + server->total_read; - rdata->iov[0].iov_len = len; - length = cifs_readv_from_socket(server, rdata->iov, 1, len); + rdata->iov.iov_base = buf + server->total_read; + rdata->iov.iov_len = len; + length = cifs_readv_from_socket(server, &rdata->iov, 1, len); if (length < 0) return length; server->total_read += length; } /* set up first iov for signature check */ - rdata->iov[0].iov_base = buf; - rdata->iov[0].iov_len = server->total_read; + rdata->iov.iov_base = buf; + rdata->iov.iov_len = server->total_read; cFYI(1, "0: iov_base=%p iov_len=%zu", - rdata->iov[0].iov_base, rdata->iov[0].iov_len); + rdata->iov.iov_base, rdata->iov.iov_len); /* how much data is in the response? */ data_len = server->ops->read_data_length(buf); @@ -1531,23 +1507,11 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) return cifs_readv_discard(server, mid); } - /* marshal up the page array */ - cifs_kmap_lock(); - len = rdata->marshal_iov(rdata, data_len); - cifs_kmap_unlock(); - data_len -= len; - - /* issue the read if we have any iovecs left to fill */ - if (rdata->nr_iov > 1) { - length = cifs_readv_from_socket(server, &rdata->iov[1], - rdata->nr_iov - 1, len); - if (length < 0) - return length; - server->total_read += length; - } else { - length = 0; - } + length = rdata->read_into_pages(server, rdata, data_len); + if (length < 0) + return length; + server->total_read += length; rdata->bytes = length; cFYI(1, "total_read=%u buflen=%u remaining=%u", server->total_read, @@ -1567,6 +1531,12 @@ cifs_readv_callback(struct mid_q_entry *mid) struct cifs_readdata *rdata = mid->callback_data; struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); struct TCP_Server_Info *server = tcon->ses->server; + struct smb_rqst rqst = { .rq_iov = &rdata->iov, + .rq_nvec = 1, + .rq_pages = rdata->pages, + .rq_npages = rdata->nr_pages, + .rq_pagesz = rdata->pagesz, + .rq_tailsz = rdata->tailsz }; cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__, mid->mid, mid->mid_state, rdata->result, rdata->bytes); @@ -1576,9 +1546,13 @@ cifs_readv_callback(struct mid_q_entry *mid) /* result already set, check signature */ if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { - if (cifs_verify_signature(rdata->iov, rdata->nr_iov, - server, mid->sequence_number + 1)) - cERROR(1, "Unexpected SMB signature"); + int rc = 0; + + rc = cifs_verify_signature(&rqst, server, + mid->sequence_number + 1); + if (rc) + cERROR(1, "SMB signature verification returned " + "error = %d", rc); } /* FIXME: should this be counted toward the initiating task? */ task_io_account_read(rdata->bytes); @@ -1605,6 +1579,8 @@ cifs_async_readv(struct cifs_readdata *rdata) READ_REQ *smb = NULL; int wct; struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); + struct smb_rqst rqst = { .rq_iov = &rdata->iov, + .rq_nvec = 1 }; cFYI(1, "%s: offset=%llu bytes=%u", __func__, rdata->offset, rdata->bytes); @@ -1627,7 +1603,7 @@ cifs_async_readv(struct cifs_readdata *rdata) smb->hdr.PidHigh = cpu_to_le16((__u16)(rdata->pid >> 16)); smb->AndXCommand = 0xFF; /* none */ - smb->Fid = rdata->cfile->netfid; + smb->Fid = rdata->cfile->fid.netfid; smb->OffsetLow = cpu_to_le32(rdata->offset & 0xFFFFFFFF); if (wct == 12) smb->OffsetHigh = cpu_to_le32(rdata->offset >> 32); @@ -1644,13 +1620,12 @@ cifs_async_readv(struct cifs_readdata *rdata) } /* 4 for RFC1001 length + 1 for BCC */ - rdata->iov[0].iov_base = smb; - rdata->iov[0].iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4; + rdata->iov.iov_base = smb; + rdata->iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4; kref_get(&rdata->refcount); - rc = cifs_call_async(tcon->ses->server, rdata->iov, 1, - cifs_readv_receive, cifs_readv_callback, - rdata, 0); + rc = cifs_call_async(tcon->ses->server, &rqst, cifs_readv_receive, + cifs_readv_callback, rdata, 0); if (rc == 0) cifs_stats_inc(&tcon->stats.cifs_stats.num_reads); @@ -1921,6 +1896,7 @@ cifs_writev_requeue(struct cifs_writedata *wdata) { int i, rc; struct inode *inode = wdata->cfile->dentry->d_inode; + struct TCP_Server_Info *server; for (i = 0; i < wdata->nr_pages; i++) { lock_page(wdata->pages[i]); @@ -1928,7 +1904,8 @@ cifs_writev_requeue(struct cifs_writedata *wdata) } do { - rc = cifs_async_writev(wdata); + server = tlink_tcon(wdata->cfile->tlink)->ses->server; + rc = server->ops->async_writev(wdata); } while (rc == -EAGAIN); for (i = 0; i < wdata->nr_pages; i++) { @@ -2048,11 +2025,12 @@ cifs_writev_callback(struct mid_q_entry *mid) int cifs_async_writev(struct cifs_writedata *wdata) { - int i, rc = -EACCES; + int rc = -EACCES; WRITE_REQ *smb = NULL; int wct; struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); - struct kvec *iov = NULL; + struct kvec iov; + struct smb_rqst rqst = { }; if (tcon->ses->capabilities & CAP_LARGE_FILES) { wct = 14; @@ -2068,18 +2046,11 @@ cifs_async_writev(struct cifs_writedata *wdata) if (rc) goto async_writev_out; - /* 1 iov per page + 1 for header */ - iov = kzalloc((wdata->nr_pages + 1) * sizeof(*iov), GFP_NOFS); - if (iov == NULL) { - rc = -ENOMEM; - goto async_writev_out; - } - smb->hdr.Pid = cpu_to_le16((__u16)wdata->pid); smb->hdr.PidHigh = cpu_to_le16((__u16)(wdata->pid >> 16)); smb->AndXCommand = 0xFF; /* none */ - smb->Fid = wdata->cfile->netfid; + smb->Fid = wdata->cfile->fid.netfid; smb->OffsetLow = cpu_to_le32(wdata->offset & 0xFFFFFFFF); if (wct == 14) smb->OffsetHigh = cpu_to_le32(wdata->offset >> 32); @@ -2091,18 +2062,15 @@ cifs_async_writev(struct cifs_writedata *wdata) cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4); /* 4 for RFC1001 length + 1 for BCC */ - iov[0].iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4 + 1; - iov[0].iov_base = smb; + iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4 + 1; + iov.iov_base = smb; - /* - * This function should marshal up the page array into the kvec - * array, reserving [0] for the header. It should kmap the pages - * and set the iov_len properly for each one. It may also set - * wdata->bytes too. - */ - cifs_kmap_lock(); - wdata->marshal_iov(iov, wdata); - cifs_kmap_unlock(); + rqst.rq_iov = &iov; + rqst.rq_nvec = 1; + rqst.rq_pages = wdata->pages; + rqst.rq_npages = wdata->nr_pages; + rqst.rq_pagesz = wdata->pagesz; + rqst.rq_tailsz = wdata->tailsz; cFYI(1, "async write at %llu %u bytes", wdata->offset, wdata->bytes); @@ -2118,32 +2086,26 @@ cifs_async_writev(struct cifs_writedata *wdata) (struct smb_com_writex_req *)smb; inc_rfc1001_len(&smbw->hdr, wdata->bytes + 5); put_bcc(wdata->bytes + 5, &smbw->hdr); - iov[0].iov_len += 4; /* pad bigger by four bytes */ + iov.iov_len += 4; /* pad bigger by four bytes */ } kref_get(&wdata->refcount); - rc = cifs_call_async(tcon->ses->server, iov, wdata->nr_pages + 1, - NULL, cifs_writev_callback, wdata, 0); + rc = cifs_call_async(tcon->ses->server, &rqst, NULL, + cifs_writev_callback, wdata, 0); if (rc == 0) cifs_stats_inc(&tcon->stats.cifs_stats.num_writes); else kref_put(&wdata->refcount, cifs_writedata_release); - /* send is done, unmap pages */ - for (i = 0; i < wdata->nr_pages; i++) - kunmap(wdata->pages[i]); - async_writev_out: cifs_small_buf_release(smb); - kfree(iov); return rc; } int CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms, - unsigned int *nbytes, struct kvec *iov, int n_vec, - const int long_op) + unsigned int *nbytes, struct kvec *iov, int n_vec) { int rc = -EACCES; WRITE_REQ *pSMB = NULL; @@ -2214,8 +2176,7 @@ CIFSSMBWrite2(const unsigned int xid, struct cifs_io_parms *io_parms, iov[0].iov_len = smb_hdr_len + 8; - rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &resp_buf_type, - long_op); + rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &resp_buf_type, 0); cifs_stats_inc(&tcon->stats.cifs_stats.num_writes); if (rc) { cFYI(1, "Send error Write2 = %d", rc); @@ -2552,8 +2513,8 @@ CIFSSMBFlush(const unsigned int xid, struct cifs_tcon *tcon, int smb_file_id) int CIFSSMBRename(const unsigned int xid, struct cifs_tcon *tcon, - const char *fromName, const char *toName, - const struct nls_table *nls_codepage, int remap) + const char *from_name, const char *to_name, + struct cifs_sb_info *cifs_sb) { int rc = 0; RENAME_REQ *pSMB = NULL; @@ -2561,6 +2522,7 @@ CIFSSMBRename(const unsigned int xid, struct cifs_tcon *tcon, int bytes_returned; int name_len, name_len2; __u16 count; + int remap = cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR; cFYI(1, "In CIFSSMBRename"); renameRetry: @@ -2575,9 +2537,9 @@ renameRetry: ATTR_DIRECTORY); if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { - name_len = - cifsConvertToUTF16((__le16 *) pSMB->OldFileName, fromName, - PATH_MAX, nls_codepage, remap); + name_len = cifsConvertToUTF16((__le16 *) pSMB->OldFileName, + from_name, PATH_MAX, + cifs_sb->local_nls, remap); name_len++; /* trailing null */ name_len *= 2; pSMB->OldFileName[name_len] = 0x04; /* pad */ @@ -2585,17 +2547,18 @@ renameRetry: pSMB->OldFileName[name_len + 1] = 0x00; name_len2 = cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2], - toName, PATH_MAX, nls_codepage, remap); + to_name, PATH_MAX, cifs_sb->local_nls, + remap); name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ; name_len2 *= 2; /* convert to bytes */ } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fromName, PATH_MAX); + name_len = strnlen(from_name, PATH_MAX); name_len++; /* trailing null */ - strncpy(pSMB->OldFileName, fromName, name_len); - name_len2 = strnlen(toName, PATH_MAX); + strncpy(pSMB->OldFileName, from_name, name_len); + name_len2 = strnlen(to_name, PATH_MAX); name_len2++; /* trailing null */ pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */ - strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2); + strncpy(&pSMB->OldFileName[name_len + 1], to_name, name_len2); name_len2++; /* trailing null */ name_len2++; /* signature byte */ } @@ -2943,8 +2906,8 @@ createHardLinkRetry: int CIFSCreateHardLink(const unsigned int xid, struct cifs_tcon *tcon, - const char *fromName, const char *toName, - const struct nls_table *nls_codepage, int remap) + const char *from_name, const char *to_name, + struct cifs_sb_info *cifs_sb) { int rc = 0; NT_RENAME_REQ *pSMB = NULL; @@ -2952,6 +2915,7 @@ CIFSCreateHardLink(const unsigned int xid, struct cifs_tcon *tcon, int bytes_returned; int name_len, name_len2; __u16 count; + int remap = cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR; cFYI(1, "In CIFSCreateHardLink"); winCreateHardLinkRetry: @@ -2971,8 +2935,8 @@ winCreateHardLinkRetry: if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { name_len = - cifsConvertToUTF16((__le16 *) pSMB->OldFileName, fromName, - PATH_MAX, nls_codepage, remap); + cifsConvertToUTF16((__le16 *) pSMB->OldFileName, from_name, + PATH_MAX, cifs_sb->local_nls, remap); name_len++; /* trailing null */ name_len *= 2; @@ -2981,17 +2945,18 @@ winCreateHardLinkRetry: pSMB->OldFileName[name_len + 1] = 0x00; /* pad */ name_len2 = cifsConvertToUTF16((__le16 *)&pSMB->OldFileName[name_len+2], - toName, PATH_MAX, nls_codepage, remap); + to_name, PATH_MAX, cifs_sb->local_nls, + remap); name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ; name_len2 *= 2; /* convert to bytes */ } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fromName, PATH_MAX); + name_len = strnlen(from_name, PATH_MAX); name_len++; /* trailing null */ - strncpy(pSMB->OldFileName, fromName, name_len); - name_len2 = strnlen(toName, PATH_MAX); + strncpy(pSMB->OldFileName, from_name, name_len); + name_len2 = strnlen(to_name, PATH_MAX); name_len2++; /* trailing null */ pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */ - strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2); + strncpy(&pSMB->OldFileName[name_len + 1], to_name, name_len2); name_len2++; /* trailing null */ name_len2++; /* signature byte */ } @@ -4249,10 +4214,9 @@ UnixQPathInfoRetry: /* xid, tcon, searchName and codepage are input parms, rest are returned */ int CIFSFindFirst(const unsigned int xid, struct cifs_tcon *tcon, - const char *searchName, - const struct nls_table *nls_codepage, + const char *searchName, struct cifs_sb_info *cifs_sb, __u16 *pnetfid, __u16 search_flags, - struct cifs_search_info *psrch_inf, int remap, const char dirsep) + struct cifs_search_info *psrch_inf, bool msearch) { /* level 257 SMB_ */ TRANSACTION2_FFIRST_REQ *pSMB = NULL; @@ -4260,8 +4224,9 @@ CIFSFindFirst(const unsigned int xid, struct cifs_tcon *tcon, T2_FFIRST_RSP_PARMS *parms; int rc = 0; int bytes_returned = 0; - int name_len; + int name_len, remap; __u16 params, byte_count; + struct nls_table *nls_codepage; cFYI(1, "In FindFirst for %s", searchName); @@ -4271,6 +4236,9 @@ findFirstRetry: if (rc) return rc; + nls_codepage = cifs_sb->local_nls; + remap = cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR; + if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { name_len = cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName, @@ -4279,24 +4247,29 @@ findFirstRetry: it got remapped to 0xF03A as if it were part of the directory name instead of a wildcard */ name_len *= 2; - pSMB->FileName[name_len] = dirsep; - pSMB->FileName[name_len+1] = 0; - pSMB->FileName[name_len+2] = '*'; - pSMB->FileName[name_len+3] = 0; - name_len += 4; /* now the trailing null */ - pSMB->FileName[name_len] = 0; /* null terminate just in case */ - pSMB->FileName[name_len+1] = 0; - name_len += 2; + if (msearch) { + pSMB->FileName[name_len] = CIFS_DIR_SEP(cifs_sb); + pSMB->FileName[name_len+1] = 0; + pSMB->FileName[name_len+2] = '*'; + pSMB->FileName[name_len+3] = 0; + name_len += 4; /* now the trailing null */ + /* null terminate just in case */ + pSMB->FileName[name_len] = 0; + pSMB->FileName[name_len+1] = 0; + name_len += 2; + } } else { /* BB add check for overrun of SMB buf BB */ name_len = strnlen(searchName, PATH_MAX); /* BB fix here and in unicode clause above ie if (name_len > buffersize-header) free buffer exit; BB */ strncpy(pSMB->FileName, searchName, name_len); - pSMB->FileName[name_len] = dirsep; - pSMB->FileName[name_len+1] = '*'; - pSMB->FileName[name_len+2] = 0; - name_len += 3; + if (msearch) { + pSMB->FileName[name_len] = CIFS_DIR_SEP(cifs_sb); + pSMB->FileName[name_len+1] = '*'; + pSMB->FileName[name_len+2] = 0; + name_len += 3; + } } params = 12 + name_len /* includes null */ ; @@ -4384,7 +4357,8 @@ findFirstRetry: psrch_inf->last_entry = psrch_inf->srch_entries_start + lnoff; - *pnetfid = parms->SearchHandle; + if (pnetfid) + *pnetfid = parms->SearchHandle; } else { cifs_buf_release(pSMB); } @@ -5412,16 +5386,16 @@ QFSPosixRetry: } -/* We can not use write of zero bytes trick to - set file size due to need for large file support. Also note that - this SetPathInfo is preferred to SetFileInfo based method in next - routine which is only needed to work around a sharing violation bug - in Samba which this routine can run into */ - +/* + * We can not use write of zero bytes trick to set file size due to need for + * large file support. Also note that this SetPathInfo is preferred to + * SetFileInfo based method in next routine which is only needed to work around + * a sharing violation bugin Samba which this routine can run into. + */ int CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon, - const char *fileName, __u64 size, bool SetAllocation, - const struct nls_table *nls_codepage, int remap) + const char *file_name, __u64 size, struct cifs_sb_info *cifs_sb, + bool set_allocation) { struct smb_com_transaction2_spi_req *pSMB = NULL; struct smb_com_transaction2_spi_rsp *pSMBr = NULL; @@ -5429,6 +5403,8 @@ CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon, int name_len; int rc = 0; int bytes_returned = 0; + int remap = cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR; + __u16 params, byte_count, data_count, param_offset, offset; cFYI(1, "In SetEOF"); @@ -5440,14 +5416,14 @@ SetEOFRetry: if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) { name_len = - cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName, - PATH_MAX, nls_codepage, remap); + cifsConvertToUTF16((__le16 *) pSMB->FileName, file_name, + PATH_MAX, cifs_sb->local_nls, remap); name_len++; /* trailing null */ name_len *= 2; } else { /* BB improve the check for buffer overruns BB */ - name_len = strnlen(fileName, PATH_MAX); + name_len = strnlen(file_name, PATH_MAX); name_len++; /* trailing null */ - strncpy(pSMB->FileName, fileName, name_len); + strncpy(pSMB->FileName, file_name, name_len); } params = 6 + name_len; data_count = sizeof(struct file_end_of_file_info); @@ -5461,7 +5437,7 @@ SetEOFRetry: param_offset = offsetof(struct smb_com_transaction2_spi_req, InformationLevel) - 4; offset = param_offset + params; - if (SetAllocation) { + if (set_allocation) { if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU) pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2); @@ -5508,8 +5484,8 @@ SetEOFRetry: } int -CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon, __u64 size, - __u16 fid, __u32 pid_of_opener, bool SetAllocation) +CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon, + struct cifsFileInfo *cfile, __u64 size, bool set_allocation) { struct smb_com_transaction2_sfi_req *pSMB = NULL; struct file_end_of_file_info *parm_data; @@ -5523,8 +5499,8 @@ CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon, __u64 size, if (rc) return rc; - pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener); - pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16)); + pSMB->hdr.Pid = cpu_to_le16((__u16)cfile->pid); + pSMB->hdr.PidHigh = cpu_to_le16((__u16)(cfile->pid >> 16)); params = 6; pSMB->MaxSetupCount = 0; @@ -5553,8 +5529,8 @@ CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon, __u64 size, + offset); pSMB->DataOffset = cpu_to_le16(offset); parm_data->FileSize = cpu_to_le64(size); - pSMB->Fid = fid; - if (SetAllocation) { + pSMB->Fid = cfile->fid.netfid; + if (set_allocation) { if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU) pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2); diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 6df6fa1..2fdbe08 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -82,8 +82,7 @@ enum { Opt_serverino, Opt_noserverino, Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, Opt_acl, Opt_noacl, Opt_locallease, - Opt_sign, Opt_seal, Opt_direct, - Opt_strictcache, Opt_noac, + Opt_sign, Opt_seal, Opt_noac, Opt_fsc, Opt_mfsymlinks, Opt_multiuser, Opt_sloppy, @@ -160,10 +159,6 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_locallease, "locallease" }, { Opt_sign, "sign" }, { Opt_seal, "seal" }, - { Opt_direct, "direct" }, - { Opt_direct, "directio" }, - { Opt_direct, "forcedirectio" }, - { Opt_strictcache, "strictcache" }, { Opt_noac, "noac" }, { Opt_fsc, "fsc" }, { Opt_mfsymlinks, "mfsymlinks" }, @@ -277,6 +272,7 @@ static const match_table_t cifs_cacheflavor_tokens = { static const match_table_t cifs_smb_version_tokens = { { Smb_1, SMB1_VERSION_STRING }, { Smb_21, SMB21_VERSION_STRING }, + { Smb_30, SMB30_VERSION_STRING }, }; static int ip_connect(struct TCP_Server_Info *server); @@ -819,6 +815,10 @@ standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) cifs_dump_mem("Bad SMB: ", buf, min_t(unsigned int, server->total_read, 48)); + if (server->ops->is_status_pending && + server->ops->is_status_pending(buf, server, length)) + return -1; + if (!mid) return length; @@ -1075,6 +1075,10 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol) vol->ops = &smb21_operations; vol->vals = &smb21_values; break; + case Smb_30: + vol->ops = &smb21_operations; /* currently identical with 2.1 */ + vol->vals = &smb30_values; + break; #endif default: cERROR(1, "Unknown vers= option specified: %s", value); @@ -1101,8 +1105,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, char *string = NULL; char *tmp_end, *value; char delim; - bool cache_specified = false; - static bool cache_warned = false; separator[0] = ','; separator[1] = 0; @@ -1134,6 +1136,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, /* default to using server inode numbers where available */ vol->server_ino = 1; + /* default is to use strict cifs caching semantics */ + vol->strict_io = true; + vol->actimeo = CIFS_DEF_ACTIMEO; /* FIXME: add autonegotiation -- for now, SMB1 is default */ @@ -1317,22 +1322,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, */ vol->seal = 1; break; - case Opt_direct: - cache_specified = true; - vol->direct_io = true; - vol->strict_io = false; - cERROR(1, "The \"directio\" option will be removed in " - "3.7. Please switch to the \"cache=none\" " - "option."); - break; - case Opt_strictcache: - cache_specified = true; - vol->direct_io = false; - vol->strict_io = true; - cERROR(1, "The \"strictcache\" option will be removed " - "in 3.7. Please switch to the \"cache=strict\" " - "option."); - break; case Opt_noac: printk(KERN_WARNING "CIFS: Mount option noac not " "supported. Instead set " @@ -1676,8 +1665,13 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, if (string == NULL) goto out_nomem; - if (strnicmp(string, "TCP_NODELAY", 11) == 0) + if (strnicmp(string, "TCP_NODELAY", 11) == 0) { + printk(KERN_WARNING "CIFS: the " + "sockopt=TCP_NODELAY option has been " + "deprecated and will be removed " + "in 3.9\n"); vol->sockopt_tcp_nodelay = 1; + } break; case Opt_netbiosname: string = match_strdup(args); @@ -1762,7 +1756,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, goto cifs_parse_mount_err; break; case Opt_cache: - cache_specified = true; string = match_strdup(args); if (string == NULL) goto out_nomem; @@ -1813,14 +1806,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " "specified with no gid= option.\n"); - /* FIXME: remove this block in 3.7 */ - if (!cache_specified && !cache_warned) { - cache_warned = true; - printk(KERN_NOTICE "CIFS: no cache= option specified, using " - "\"cache=loose\". This default will change " - "to \"cache=strict\" in 3.7.\n"); - } - kfree(mountdata_copy); return 0; @@ -2636,6 +2621,7 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) tcon->retry = volume_info->retry; tcon->nocase = volume_info->nocase; tcon->local_lease = volume_info->local_lease; + INIT_LIST_HEAD(&tcon->pending_opens); spin_lock(&cifs_tcp_ses_lock); list_add(&tcon->tcon_list, &ses->tcon_list); @@ -3261,146 +3247,6 @@ void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, "mount option supported"); } -/* - * When the server supports very large reads and writes via POSIX extensions, - * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not - * including the RFC1001 length. - * - * Note that this might make for "interesting" allocation problems during - * writeback however as we have to allocate an array of pointers for the - * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. - * - * For reads, there is a similar problem as we need to allocate an array - * of kvecs to handle the receive, though that should only need to be done - * once. - */ -#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) -#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) - -/* - * When the server doesn't allow large posix writes, only allow a rsize/wsize - * of 2^17-1 minus the size of the call header. That allows for a read or - * write up to the maximum size described by RFC1002. - */ -#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) -#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) - -/* - * The default wsize is 1M. find_get_pages seems to return a maximum of 256 - * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill - * a single wsize request with a single call. - */ -#define CIFS_DEFAULT_IOSIZE (1024 * 1024) - -/* - * Windows only supports a max of 60kb reads and 65535 byte writes. Default to - * those values when posix extensions aren't in force. In actuality here, we - * use 65536 to allow for a write that is a multiple of 4k. Most servers seem - * to be ok with the extra byte even though Windows doesn't send writes that - * are that large. - * - * Citation: - * - * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx - */ -#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) -#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) - -/* - * On hosts with high memory, we can't currently support wsize/rsize that are - * larger than we can kmap at once. Cap the rsize/wsize at - * LAST_PKMAP * PAGE_SIZE. We'll never be able to fill a read or write request - * larger than that anyway. - */ -#ifdef CONFIG_HIGHMEM -#define CIFS_KMAP_SIZE_LIMIT (LAST_PKMAP * PAGE_CACHE_SIZE) -#else /* CONFIG_HIGHMEM */ -#define CIFS_KMAP_SIZE_LIMIT (1<<24) -#endif /* CONFIG_HIGHMEM */ - -static unsigned int -cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) -{ - __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); - struct TCP_Server_Info *server = tcon->ses->server; - unsigned int wsize; - - /* start with specified wsize, or default */ - if (pvolume_info->wsize) - wsize = pvolume_info->wsize; - else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) - wsize = CIFS_DEFAULT_IOSIZE; - else - wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; - - /* can server support 24-bit write sizes? (via UNIX extensions) */ - if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) - wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); - - /* - * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? - * Limit it to max buffer offered by the server, minus the size of the - * WRITEX header, not including the 4 byte RFC1001 length. - */ - if (!(server->capabilities & CAP_LARGE_WRITE_X) || - (!(server->capabilities & CAP_UNIX) && - (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) - wsize = min_t(unsigned int, wsize, - server->maxBuf - sizeof(WRITE_REQ) + 4); - - /* limit to the amount that we can kmap at once */ - wsize = min_t(unsigned int, wsize, CIFS_KMAP_SIZE_LIMIT); - - /* hard limit of CIFS_MAX_WSIZE */ - wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); - - return wsize; -} - -static unsigned int -cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) -{ - __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); - struct TCP_Server_Info *server = tcon->ses->server; - unsigned int rsize, defsize; - - /* - * Set default value... - * - * HACK alert! Ancient servers have very small buffers. Even though - * MS-CIFS indicates that servers are only limited by the client's - * bufsize for reads, testing against win98se shows that it throws - * INVALID_PARAMETER errors if you try to request too large a read. - * OS/2 just sends back short reads. - * - * If the server doesn't advertise CAP_LARGE_READ_X, then assume that - * it can't handle a read request larger than its MaxBufferSize either. - */ - if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) - defsize = CIFS_DEFAULT_IOSIZE; - else if (server->capabilities & CAP_LARGE_READ_X) - defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; - else - defsize = server->maxBuf - sizeof(READ_RSP); - - rsize = pvolume_info->rsize ? pvolume_info->rsize : defsize; - - /* - * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to - * the client's MaxBufferSize. - */ - if (!(server->capabilities & CAP_LARGE_READ_X)) - rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); - - /* limit to the amount that we can kmap at once */ - rsize = min_t(unsigned int, rsize, CIFS_KMAP_SIZE_LIMIT); - - /* hard limit of CIFS_MAX_RSIZE */ - rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); - - return rsize; -} - static void cleanup_volume_info_contents(struct smb_vol *volume_info) { @@ -3651,8 +3497,8 @@ try_mount_again: if (!tcon->ipc && server->ops->qfs_tcon) server->ops->qfs_tcon(xid, tcon); - cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); - cifs_sb->rsize = cifs_negotiate_rsize(tcon, volume_info); + cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info); + cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info); /* tune readahead according to rsize */ cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index cbe709a..7c0a812 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -160,17 +160,18 @@ check_name(struct dentry *direntry) static int cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, struct tcon_link *tlink, unsigned oflags, umode_t mode, - __u32 *oplock, __u16 *fileHandle, int *created) + __u32 *oplock, struct cifs_fid *fid, int *created) { int rc = -ENOENT; int create_options = CREATE_NOT_DIR; - int desiredAccess; + int desired_access; struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifs_tcon *tcon = tlink_tcon(tlink); char *full_path = NULL; FILE_ALL_INFO *buf = NULL; struct inode *newinode = NULL; int disposition; + struct TCP_Server_Info *server = tcon->ses->server; *oplock = 0; if (tcon->ses->server->oplocks) @@ -185,8 +186,8 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open && (CIFS_UNIX_POSIX_PATH_OPS_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability))) { - rc = cifs_posix_open(full_path, &newinode, - inode->i_sb, mode, oflags, oplock, fileHandle, xid); + rc = cifs_posix_open(full_path, &newinode, inode->i_sb, mode, + oflags, oplock, &fid->netfid, xid); switch (rc) { case 0: if (newinode == NULL) { @@ -202,7 +203,7 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, * close it and proceed as if it were a normal * lookup. */ - CIFSSMBClose(xid, tcon, *fileHandle); + CIFSSMBClose(xid, tcon, fid->netfid); goto cifs_create_get_file_info; } /* success, no need to query */ @@ -244,11 +245,11 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, */ } - desiredAccess = 0; + desired_access = 0; if (OPEN_FMODE(oflags) & FMODE_READ) - desiredAccess |= GENERIC_READ; /* is this too little? */ + desired_access |= GENERIC_READ; /* is this too little? */ if (OPEN_FMODE(oflags) & FMODE_WRITE) - desiredAccess |= GENERIC_WRITE; + desired_access |= GENERIC_WRITE; disposition = FILE_OVERWRITE_IF; if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) @@ -260,8 +261,15 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, else cFYI(1, "Create flag not set in create function"); - /* BB add processing to set equivalent of mode - e.g. via CreateX with - ACLs */ + /* + * BB add processing to set equivalent of mode - e.g. via CreateX with + * ACLs + */ + + if (!server->ops->open) { + rc = -ENOSYS; + goto out; + } buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); if (buf == NULL) { @@ -279,28 +287,18 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, if (backup_cred(cifs_sb)) create_options |= CREATE_OPEN_BACKUP_INTENT; - if (tcon->ses->capabilities & CAP_NT_SMBS) - rc = CIFSSMBOpen(xid, tcon, full_path, disposition, - desiredAccess, create_options, - fileHandle, oplock, buf, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - else - rc = -EIO; /* no NT SMB support fall into legacy open below */ - - if (rc == -EIO) { - /* old server, retry the open legacy style */ - rc = SMBLegacyOpen(xid, tcon, full_path, disposition, - desiredAccess, create_options, - fileHandle, oplock, buf, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - } + rc = server->ops->open(xid, tcon, full_path, disposition, + desired_access, create_options, fid, oplock, + buf, cifs_sb); if (rc) { cFYI(1, "cifs_create returned 0x%x", rc); goto out; } - /* If Open reported that we actually created a file - then we now have to set the mode if possible */ + /* + * If Open reported that we actually created a file then we now have to + * set the mode if possible. + */ if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) { struct cifs_unix_set_info_args args = { .mode = mode, @@ -321,11 +319,13 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, args.uid = NO_CHANGE_64; args.gid = NO_CHANGE_64; } - CIFSSMBUnixSetFileInfo(xid, tcon, &args, *fileHandle, - current->tgid); + CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid->netfid, + current->tgid); } else { - /* BB implement mode setting via Windows security - descriptors e.g. */ + /* + * BB implement mode setting via Windows security + * descriptors e.g. + */ /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ /* Could set r/o dos attribute if mode & 0222 == 0 */ @@ -334,12 +334,14 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, cifs_create_get_file_info: /* server might mask mode so we have to query for it */ if (tcon->unix_ext) - rc = cifs_get_inode_info_unix(&newinode, full_path, - inode->i_sb, xid); + rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb, + xid); else { - rc = cifs_get_inode_info(&newinode, full_path, buf, - inode->i_sb, xid, fileHandle); + rc = cifs_get_inode_info(&newinode, full_path, buf, inode->i_sb, + xid, &fid->netfid); if (newinode) { + if (server->ops->set_lease_key) + server->ops->set_lease_key(newinode, fid); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) newinode->i_mode = mode; if ((*oplock & CIFS_CREATE_ACTION) && @@ -356,19 +358,13 @@ cifs_create_get_file_info: cifs_create_set_dentry: if (rc != 0) { cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); + if (server->ops->close) + server->ops->close(xid, tcon, fid); goto out; } d_drop(direntry); d_add(direntry, newinode); - /* ENOENT for create? How weird... */ - rc = -ENOENT; - if (!newinode) { - CIFSSMBClose(xid, tcon, *fileHandle); - goto out; - } - rc = 0; - out: kfree(buf); kfree(full_path); @@ -384,11 +380,14 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry, unsigned int xid; struct tcon_link *tlink; struct cifs_tcon *tcon; - __u16 fileHandle; + struct TCP_Server_Info *server; + struct cifs_fid fid; + struct cifs_pending_open open; __u32 oplock; - struct cifsFileInfo *pfile_info; + struct cifsFileInfo *file_info; - /* Posix open is only called (at lookup time) for file create now. For + /* + * Posix open is only called (at lookup time) for file create now. For * opens (rather than creates), because we do not know if it is a file * or directory yet, and current Samba no longer allows us to do posix * open on dirs, we could end up wasting an open call on what turns out @@ -420,22 +419,34 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry, goto out_free_xid; tcon = tlink_tcon(tlink); + server = tcon->ses->server; + + if (server->ops->new_lease_key) + server->ops->new_lease_key(&fid); + + cifs_add_pending_open(&fid, tlink, &open); rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, - &oplock, &fileHandle, opened); + &oplock, &fid, opened); - if (rc) + if (rc) { + cifs_del_pending_open(&open); goto out; + } rc = finish_open(file, direntry, generic_file_open, opened); if (rc) { - CIFSSMBClose(xid, tcon, fileHandle); + if (server->ops->close) + server->ops->close(xid, tcon, &fid); + cifs_del_pending_open(&open); goto out; } - pfile_info = cifs_new_fileinfo(fileHandle, file, tlink, oplock); - if (pfile_info == NULL) { - CIFSSMBClose(xid, tcon, fileHandle); + file_info = cifs_new_fileinfo(&fid, file, tlink, oplock); + if (file_info == NULL) { + if (server->ops->close) + server->ops->close(xid, tcon, &fid); + cifs_del_pending_open(&open); rc = -ENOMEM; } @@ -460,7 +471,9 @@ int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode, */ unsigned oflags = O_EXCL | O_CREAT | O_RDWR; struct tcon_link *tlink; - __u16 fileHandle; + struct cifs_tcon *tcon; + struct TCP_Server_Info *server; + struct cifs_fid fid; __u32 oplock; int created = FILE_CREATED; @@ -472,10 +485,16 @@ int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode, if (IS_ERR(tlink)) goto out_free_xid; + tcon = tlink_tcon(tlink); + server = tcon->ses->server; + + if (server->ops->new_lease_key) + server->ops->new_lease_key(&fid); + rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, - &oplock, &fileHandle, &created); - if (!rc) - CIFSSMBClose(xid, tlink_tcon(tlink), fileHandle); + &oplock, &fid, &created); + if (!rc && server->ops->close) + server->ops->close(xid, tcon, &fid); cifs_put_tlink(tlink); out_free_xid: diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 9154192..edb25b4 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -169,16 +169,20 @@ posix_open_ret: static int cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, - struct cifs_tcon *tcon, unsigned int f_flags, __u32 *poplock, - __u16 *pnetfid, unsigned int xid) + struct cifs_tcon *tcon, unsigned int f_flags, __u32 *oplock, + struct cifs_fid *fid, unsigned int xid) { int rc; - int desiredAccess; + int desired_access; int disposition; int create_options = CREATE_NOT_DIR; FILE_ALL_INFO *buf; + struct TCP_Server_Info *server = tcon->ses->server; + + if (!server->ops->open) + return -ENOSYS; - desiredAccess = cifs_convert_flags(f_flags); + desired_access = cifs_convert_flags(f_flags); /********************************************************************* * open flag mapping table: @@ -215,16 +219,9 @@ cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, if (backup_cred(cifs_sb)) create_options |= CREATE_OPEN_BACKUP_INTENT; - if (tcon->ses->capabilities & CAP_NT_SMBS) - rc = CIFSSMBOpen(xid, tcon, full_path, disposition, - desiredAccess, create_options, pnetfid, poplock, buf, - cifs_sb->local_nls, cifs_sb->mnt_cifs_flags - & CIFS_MOUNT_MAP_SPECIAL_CHR); - else - rc = SMBLegacyOpen(xid, tcon, full_path, disposition, - desiredAccess, CREATE_NOT_DIR, pnetfid, poplock, buf, - cifs_sb->local_nls, cifs_sb->mnt_cifs_flags - & CIFS_MOUNT_MAP_SPECIAL_CHR); + rc = server->ops->open(xid, tcon, full_path, disposition, + desired_access, create_options, fid, oplock, buf, + cifs_sb); if (rc) goto out; @@ -234,7 +231,7 @@ cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, xid); else rc = cifs_get_inode_info(&inode, full_path, buf, inode->i_sb, - xid, pnetfid); + xid, &fid->netfid); out: kfree(buf); @@ -242,48 +239,62 @@ out: } struct cifsFileInfo * -cifs_new_fileinfo(__u16 fileHandle, struct file *file, +cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, struct tcon_link *tlink, __u32 oplock) { struct dentry *dentry = file->f_path.dentry; struct inode *inode = dentry->d_inode; - struct cifsInodeInfo *pCifsInode = CIFS_I(inode); - struct cifsFileInfo *pCifsFile; - - pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); - if (pCifsFile == NULL) - return pCifsFile; - - pCifsFile->count = 1; - pCifsFile->netfid = fileHandle; - pCifsFile->pid = current->tgid; - pCifsFile->uid = current_fsuid(); - pCifsFile->dentry = dget(dentry); - pCifsFile->f_flags = file->f_flags; - pCifsFile->invalidHandle = false; - pCifsFile->tlink = cifs_get_tlink(tlink); - mutex_init(&pCifsFile->fh_mutex); - INIT_WORK(&pCifsFile->oplock_break, cifs_oplock_break); - INIT_LIST_HEAD(&pCifsFile->llist); + struct cifsInodeInfo *cinode = CIFS_I(inode); + struct cifsFileInfo *cfile; + struct cifs_fid_locks *fdlocks; + struct cifs_tcon *tcon = tlink_tcon(tlink); + + cfile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); + if (cfile == NULL) + return cfile; + + fdlocks = kzalloc(sizeof(struct cifs_fid_locks), GFP_KERNEL); + if (!fdlocks) { + kfree(cfile); + return NULL; + } + + INIT_LIST_HEAD(&fdlocks->locks); + fdlocks->cfile = cfile; + cfile->llist = fdlocks; + down_write(&cinode->lock_sem); + list_add(&fdlocks->llist, &cinode->llist); + up_write(&cinode->lock_sem); + + cfile->count = 1; + cfile->pid = current->tgid; + cfile->uid = current_fsuid(); + cfile->dentry = dget(dentry); + cfile->f_flags = file->f_flags; + cfile->invalidHandle = false; + cfile->tlink = cifs_get_tlink(tlink); + INIT_WORK(&cfile->oplock_break, cifs_oplock_break); + mutex_init(&cfile->fh_mutex); spin_lock(&cifs_file_list_lock); - list_add(&pCifsFile->tlist, &(tlink_tcon(tlink)->openFileList)); + if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE) + oplock = fid->pending_open->oplock; + list_del(&fid->pending_open->olist); + + tlink_tcon(tlink)->ses->server->ops->set_fid(cfile, fid, oplock); + + list_add(&cfile->tlist, &tcon->openFileList); /* if readable file instance put first in list*/ if (file->f_mode & FMODE_READ) - list_add(&pCifsFile->flist, &pCifsInode->openFileList); + list_add(&cfile->flist, &cinode->openFileList); else - list_add_tail(&pCifsFile->flist, &pCifsInode->openFileList); + list_add_tail(&cfile->flist, &cinode->openFileList); spin_unlock(&cifs_file_list_lock); - cifs_set_oplock_level(pCifsInode, oplock); - pCifsInode->can_cache_brlcks = pCifsInode->clientCanCacheAll; - - file->private_data = pCifsFile; - return pCifsFile; + file->private_data = cfile; + return cfile; } -static void cifs_del_lock_waiters(struct cifsLockInfo *lock); - struct cifsFileInfo * cifsFileInfo_get(struct cifsFileInfo *cifs_file) { @@ -302,9 +313,12 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) { struct inode *inode = cifs_file->dentry->d_inode; struct cifs_tcon *tcon = tlink_tcon(cifs_file->tlink); + struct TCP_Server_Info *server = tcon->ses->server; struct cifsInodeInfo *cifsi = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifsLockInfo *li, *tmp; + struct cifs_fid fid; + struct cifs_pending_open open; spin_lock(&cifs_file_list_lock); if (--cifs_file->count > 0) { @@ -312,6 +326,12 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) return; } + if (server->ops->get_lease_key) + server->ops->get_lease_key(inode, &fid); + + /* store open in pending opens to make sure we don't miss lease break */ + cifs_add_pending_open_locked(&fid, cifs_file->tlink, &open); + /* remove it from the lists */ list_del(&cifs_file->flist); list_del(&cifs_file->tlist); @@ -319,13 +339,13 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) if (list_empty(&cifsi->openFileList)) { cFYI(1, "closing last open instance for inode %p", cifs_file->dentry->d_inode); - - /* in strict cache mode we need invalidate mapping on the last - close because it may cause a error when we open this file - again and get at least level II oplock */ + /* + * In strict cache mode we need invalidate mapping on the last + * close because it may cause a error when we open this file + * again and get at least level II oplock. + */ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) CIFS_I(inode)->invalid_mapping = true; - cifs_set_oplock_level(cifsi, 0); } spin_unlock(&cifs_file_list_lock); @@ -333,23 +353,30 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) cancel_work_sync(&cifs_file->oplock_break); if (!tcon->need_reconnect && !cifs_file->invalidHandle) { + struct TCP_Server_Info *server = tcon->ses->server; unsigned int xid; - int rc; + xid = get_xid(); - rc = CIFSSMBClose(xid, tcon, cifs_file->netfid); - free_xid(xid); + if (server->ops->close) + server->ops->close(xid, tcon, &cifs_file->fid); + _free_xid(xid); } - /* Delete any outstanding lock records. We'll lose them when the file + cifs_del_pending_open(&open); + + /* + * Delete any outstanding lock records. We'll lose them when the file * is closed anyway. */ - mutex_lock(&cifsi->lock_mutex); - list_for_each_entry_safe(li, tmp, &cifs_file->llist, llist) { + down_write(&cifsi->lock_sem); + list_for_each_entry_safe(li, tmp, &cifs_file->llist->locks, llist) { list_del(&li->llist); cifs_del_lock_waiters(li); kfree(li); } - mutex_unlock(&cifsi->lock_mutex); + list_del(&cifs_file->llist->llist); + kfree(cifs_file->llist); + up_write(&cifsi->lock_sem); cifs_put_tlink(cifs_file->tlink); dput(cifs_file->dentry); @@ -357,17 +384,20 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) } int cifs_open(struct inode *inode, struct file *file) + { int rc = -EACCES; unsigned int xid; __u32 oplock; struct cifs_sb_info *cifs_sb; + struct TCP_Server_Info *server; struct cifs_tcon *tcon; struct tcon_link *tlink; - struct cifsFileInfo *pCifsFile = NULL; + struct cifsFileInfo *cfile = NULL; char *full_path = NULL; bool posix_open_ok = false; - __u16 netfid; + struct cifs_fid fid; + struct cifs_pending_open open; xid = get_xid(); @@ -378,6 +408,7 @@ int cifs_open(struct inode *inode, struct file *file) return PTR_ERR(tlink); } tcon = tlink_tcon(tlink); + server = tcon->ses->server; full_path = build_path_from_dentry(file->f_path.dentry); if (full_path == NULL) { @@ -388,7 +419,7 @@ int cifs_open(struct inode *inode, struct file *file) cFYI(1, "inode = 0x%p file flags are 0x%x for %s", inode, file->f_flags, full_path); - if (tcon->ses->server->oplocks) + if (server->oplocks) oplock = REQ_OPLOCK; else oplock = 0; @@ -399,7 +430,7 @@ int cifs_open(struct inode *inode, struct file *file) /* can not refresh inode info since size could be stale */ rc = cifs_posix_open(full_path, &inode, inode->i_sb, cifs_sb->mnt_file_mode /* ignored */, - file->f_flags, &oplock, &netfid, xid); + file->f_flags, &oplock, &fid.netfid, xid); if (rc == 0) { cFYI(1, "posix open succeeded"); posix_open_ok = true; @@ -415,20 +446,34 @@ int cifs_open(struct inode *inode, struct file *file) } else if ((rc != -EIO) && (rc != -EREMOTE) && (rc != -EOPNOTSUPP)) /* path not found or net err */ goto out; - /* else fallthrough to retry open the old way on network i/o - or DFS errors */ + /* + * Else fallthrough to retry open the old way on network i/o + * or DFS errors. + */ } + if (server->ops->get_lease_key) + server->ops->get_lease_key(inode, &fid); + + cifs_add_pending_open(&fid, tlink, &open); + if (!posix_open_ok) { + if (server->ops->get_lease_key) + server->ops->get_lease_key(inode, &fid); + rc = cifs_nt_open(full_path, inode, cifs_sb, tcon, - file->f_flags, &oplock, &netfid, xid); - if (rc) + file->f_flags, &oplock, &fid, xid); + if (rc) { + cifs_del_pending_open(&open); goto out; + } } - pCifsFile = cifs_new_fileinfo(netfid, file, tlink, oplock); - if (pCifsFile == NULL) { - CIFSSMBClose(xid, tcon, netfid); + cfile = cifs_new_fileinfo(&fid, file, tlink, oplock); + if (cfile == NULL) { + if (server->ops->close) + server->ops->close(xid, tcon, &fid); + cifs_del_pending_open(&open); rc = -ENOMEM; goto out; } @@ -436,8 +481,10 @@ int cifs_open(struct inode *inode, struct file *file) cifs_fscache_set_inode_cookie(inode, file); if ((oplock & CIFS_CREATE_ACTION) && !posix_open_ok && tcon->unix_ext) { - /* time to set mode which we can not set earlier due to - problems creating new read-only files */ + /* + * Time to set mode which we can not set earlier due to + * problems creating new read-only files. + */ struct cifs_unix_set_info_args args = { .mode = inode->i_mode, .uid = NO_CHANGE_64, @@ -447,8 +494,8 @@ int cifs_open(struct inode *inode, struct file *file) .mtime = NO_CHANGE_64, .device = 0, }; - CIFSSMBUnixSetFileInfo(xid, tcon, &args, netfid, - pCifsFile->pid); + CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid.netfid, + cfile->pid); } out: @@ -458,59 +505,66 @@ out: return rc; } -/* Try to reacquire byte range locks that were released when session */ -/* to server was lost */ +/* + * Try to reacquire byte range locks that were released when session + * to server was lost + */ static int cifs_relock_file(struct cifsFileInfo *cifsFile) { int rc = 0; -/* BB list all locks open on this file and relock */ + /* BB list all locks open on this file and relock */ return rc; } -static int cifs_reopen_file(struct cifsFileInfo *pCifsFile, bool can_flush) +static int +cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush) { int rc = -EACCES; unsigned int xid; __u32 oplock; struct cifs_sb_info *cifs_sb; struct cifs_tcon *tcon; - struct cifsInodeInfo *pCifsInode; + struct TCP_Server_Info *server; + struct cifsInodeInfo *cinode; struct inode *inode; char *full_path = NULL; - int desiredAccess; + int desired_access; int disposition = FILE_OPEN; int create_options = CREATE_NOT_DIR; - __u16 netfid; + struct cifs_fid fid; xid = get_xid(); - mutex_lock(&pCifsFile->fh_mutex); - if (!pCifsFile->invalidHandle) { - mutex_unlock(&pCifsFile->fh_mutex); + mutex_lock(&cfile->fh_mutex); + if (!cfile->invalidHandle) { + mutex_unlock(&cfile->fh_mutex); rc = 0; free_xid(xid); return rc; } - inode = pCifsFile->dentry->d_inode; + inode = cfile->dentry->d_inode; cifs_sb = CIFS_SB(inode->i_sb); - tcon = tlink_tcon(pCifsFile->tlink); + tcon = tlink_tcon(cfile->tlink); + server = tcon->ses->server; -/* can not grab rename sem here because various ops, including - those that already have the rename sem can end up causing writepage - to get called and if the server was down that means we end up here, - and we can never tell if the caller already has the rename_sem */ - full_path = build_path_from_dentry(pCifsFile->dentry); + /* + * Can not grab rename sem here because various ops, including those + * that already have the rename sem can end up causing writepage to get + * called and if the server was down that means we end up here, and we + * can never tell if the caller already has the rename_sem. + */ + full_path = build_path_from_dentry(cfile->dentry); if (full_path == NULL) { rc = -ENOMEM; - mutex_unlock(&pCifsFile->fh_mutex); + mutex_unlock(&cfile->fh_mutex); free_xid(xid); return rc; } - cFYI(1, "inode = 0x%p file flags 0x%x for %s", - inode, pCifsFile->f_flags, full_path); + cFYI(1, "inode = 0x%p file flags 0x%x for %s", inode, cfile->f_flags, + full_path); if (tcon->ses->server->oplocks) oplock = REQ_OPLOCK; @@ -524,69 +578,72 @@ static int cifs_reopen_file(struct cifsFileInfo *pCifsFile, bool can_flush) * O_CREAT, O_EXCL and O_TRUNC already had their effect on the * original open. Must mask them off for a reopen. */ - unsigned int oflags = pCifsFile->f_flags & + unsigned int oflags = cfile->f_flags & ~(O_CREAT | O_EXCL | O_TRUNC); rc = cifs_posix_open(full_path, NULL, inode->i_sb, - cifs_sb->mnt_file_mode /* ignored */, - oflags, &oplock, &netfid, xid); + cifs_sb->mnt_file_mode /* ignored */, + oflags, &oplock, &fid.netfid, xid); if (rc == 0) { cFYI(1, "posix reopen succeeded"); goto reopen_success; } - /* fallthrough to retry open the old way on errors, especially - in the reconnect path it is important to retry hard */ + /* + * fallthrough to retry open the old way on errors, especially + * in the reconnect path it is important to retry hard + */ } - desiredAccess = cifs_convert_flags(pCifsFile->f_flags); + desired_access = cifs_convert_flags(cfile->f_flags); if (backup_cred(cifs_sb)) create_options |= CREATE_OPEN_BACKUP_INTENT; - /* Can not refresh inode by passing in file_info buf to be returned - by SMBOpen and then calling get_inode_info with returned buf - since file might have write behind data that needs to be flushed - and server version of file size can be stale. If we knew for sure - that inode was not dirty locally we could do this */ + if (server->ops->get_lease_key) + server->ops->get_lease_key(inode, &fid); - rc = CIFSSMBOpen(xid, tcon, full_path, disposition, desiredAccess, - create_options, &netfid, &oplock, NULL, - cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); + /* + * Can not refresh inode by passing in file_info buf to be returned by + * CIFSSMBOpen and then calling get_inode_info with returned buf since + * file might have write behind data that needs to be flushed and server + * version of file size can be stale. If we knew for sure that inode was + * not dirty locally we could do this. + */ + rc = server->ops->open(xid, tcon, full_path, disposition, + desired_access, create_options, &fid, &oplock, + NULL, cifs_sb); if (rc) { - mutex_unlock(&pCifsFile->fh_mutex); - cFYI(1, "cifs_open returned 0x%x", rc); + mutex_unlock(&cfile->fh_mutex); + cFYI(1, "cifs_reopen returned 0x%x", rc); cFYI(1, "oplock: %d", oplock); goto reopen_error_exit; } reopen_success: - pCifsFile->netfid = netfid; - pCifsFile->invalidHandle = false; - mutex_unlock(&pCifsFile->fh_mutex); - pCifsInode = CIFS_I(inode); + cfile->invalidHandle = false; + mutex_unlock(&cfile->fh_mutex); + cinode = CIFS_I(inode); if (can_flush) { rc = filemap_write_and_wait(inode->i_mapping); mapping_set_error(inode->i_mapping, rc); if (tcon->unix_ext) - rc = cifs_get_inode_info_unix(&inode, - full_path, inode->i_sb, xid); + rc = cifs_get_inode_info_unix(&inode, full_path, + inode->i_sb, xid); else - rc = cifs_get_inode_info(&inode, - full_path, NULL, inode->i_sb, - xid, NULL); - } /* else we are writing out data to server already - and could deadlock if we tried to flush data, and - since we do not know if we have data that would - invalidate the current end of file on the server - we can not go to the server to get the new inod - info */ - - cifs_set_oplock_level(pCifsInode, oplock); + rc = cifs_get_inode_info(&inode, full_path, NULL, + inode->i_sb, xid, NULL); + } + /* + * Else we are writing out data to server already and could deadlock if + * we tried to flush data, and since we do not know if we have data that + * would invalidate the current end of file on the server we can not go + * to the server to get the new inode info. + */ - cifs_relock_file(pCifsFile); + server->ops->set_fid(cfile, &fid, oplock); + cifs_relock_file(cfile); reopen_error_exit: kfree(full_path); @@ -609,42 +666,48 @@ int cifs_closedir(struct inode *inode, struct file *file) { int rc = 0; unsigned int xid; - struct cifsFileInfo *pCFileStruct = file->private_data; - char *ptmp; + struct cifsFileInfo *cfile = file->private_data; + struct cifs_tcon *tcon; + struct TCP_Server_Info *server; + char *buf; cFYI(1, "Closedir inode = 0x%p", inode); + if (cfile == NULL) + return rc; + xid = get_xid(); + tcon = tlink_tcon(cfile->tlink); + server = tcon->ses->server; - if (pCFileStruct) { - struct cifs_tcon *pTcon = tlink_tcon(pCFileStruct->tlink); + cFYI(1, "Freeing private data in close dir"); + spin_lock(&cifs_file_list_lock); + if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) { + cfile->invalidHandle = true; + spin_unlock(&cifs_file_list_lock); + if (server->ops->close_dir) + rc = server->ops->close_dir(xid, tcon, &cfile->fid); + else + rc = -ENOSYS; + cFYI(1, "Closing uncompleted readdir with rc %d", rc); + /* not much we can do if it fails anyway, ignore rc */ + rc = 0; + } else + spin_unlock(&cifs_file_list_lock); - cFYI(1, "Freeing private data in close dir"); - spin_lock(&cifs_file_list_lock); - if (!pCFileStruct->srch_inf.endOfSearch && - !pCFileStruct->invalidHandle) { - pCFileStruct->invalidHandle = true; - spin_unlock(&cifs_file_list_lock); - rc = CIFSFindClose(xid, pTcon, pCFileStruct->netfid); - cFYI(1, "Closing uncompleted readdir with rc %d", - rc); - /* not much we can do if it fails anyway, ignore rc */ - rc = 0; - } else - spin_unlock(&cifs_file_list_lock); - ptmp = pCFileStruct->srch_inf.ntwrk_buf_start; - if (ptmp) { - cFYI(1, "closedir free smb buf in srch struct"); - pCFileStruct->srch_inf.ntwrk_buf_start = NULL; - if (pCFileStruct->srch_inf.smallBuf) - cifs_small_buf_release(ptmp); - else - cifs_buf_release(ptmp); - } - cifs_put_tlink(pCFileStruct->tlink); - kfree(file->private_data); - file->private_data = NULL; + buf = cfile->srch_inf.ntwrk_buf_start; + if (buf) { + cFYI(1, "closedir free smb buf in srch struct"); + cfile->srch_inf.ntwrk_buf_start = NULL; + if (cfile->srch_inf.smallBuf) + cifs_small_buf_release(buf); + else + cifs_buf_release(buf); } + + cifs_put_tlink(cfile->tlink); + kfree(file->private_data); + file->private_data = NULL; /* BB can we lock the filestruct while this is going on? */ free_xid(xid); return rc; @@ -666,7 +729,7 @@ cifs_lock_init(__u64 offset, __u64 length, __u8 type) return lock; } -static void +void cifs_del_lock_waiters(struct cifsLockInfo *lock) { struct cifsLockInfo *li, *tmp; @@ -677,45 +740,47 @@ cifs_del_lock_waiters(struct cifsLockInfo *lock) } static bool -cifs_find_fid_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, - __u64 length, __u8 type, struct cifsFileInfo *cur, - struct cifsLockInfo **conf_lock) +cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset, + __u64 length, __u8 type, struct cifsFileInfo *cfile, + struct cifsLockInfo **conf_lock, bool rw_check) { struct cifsLockInfo *li; + struct cifsFileInfo *cur_cfile = fdlocks->cfile; struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; - list_for_each_entry(li, &cfile->llist, llist) { + list_for_each_entry(li, &fdlocks->locks, llist) { if (offset + length <= li->offset || offset >= li->offset + li->length) continue; - else if ((type & server->vals->shared_lock_type) && - ((server->ops->compare_fids(cur, cfile) && - current->tgid == li->pid) || type == li->type)) + if (rw_check && server->ops->compare_fids(cfile, cur_cfile) && + current->tgid == li->pid) continue; - else { + if ((type & server->vals->shared_lock_type) && + ((server->ops->compare_fids(cfile, cur_cfile) && + current->tgid == li->pid) || type == li->type)) + continue; + if (conf_lock) *conf_lock = li; - return true; - } + return true; } return false; } -static bool +bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, __u64 length, - __u8 type, struct cifsLockInfo **conf_lock) + __u8 type, struct cifsLockInfo **conf_lock, + bool rw_check) { bool rc = false; - struct cifsFileInfo *fid, *tmp; + struct cifs_fid_locks *cur; struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); - spin_lock(&cifs_file_list_lock); - list_for_each_entry_safe(fid, tmp, &cinode->openFileList, flist) { - rc = cifs_find_fid_lock_conflict(fid, offset, length, type, - cfile, conf_lock); + list_for_each_entry(cur, &cinode->llist, llist) { + rc = cifs_find_fid_lock_conflict(cur, offset, length, type, + cfile, conf_lock, rw_check); if (rc) break; } - spin_unlock(&cifs_file_list_lock); return rc; } @@ -737,10 +802,10 @@ cifs_lock_test(struct cifsFileInfo *cfile, __u64 offset, __u64 length, struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; bool exist; - mutex_lock(&cinode->lock_mutex); + down_read(&cinode->lock_sem); exist = cifs_find_lock_conflict(cfile, offset, length, type, - &conf_lock); + &conf_lock, false); if (exist) { flock->fl_start = conf_lock->offset; flock->fl_end = conf_lock->offset + conf_lock->length - 1; @@ -754,7 +819,7 @@ cifs_lock_test(struct cifsFileInfo *cfile, __u64 offset, __u64 length, else flock->fl_type = F_UNLCK; - mutex_unlock(&cinode->lock_mutex); + up_read(&cinode->lock_sem); return rc; } @@ -762,9 +827,9 @@ static void cifs_lock_add(struct cifsFileInfo *cfile, struct cifsLockInfo *lock) { struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); - mutex_lock(&cinode->lock_mutex); - list_add_tail(&lock->llist, &cfile->llist); - mutex_unlock(&cinode->lock_mutex); + down_write(&cinode->lock_sem); + list_add_tail(&lock->llist, &cfile->llist->locks); + up_write(&cinode->lock_sem); } /* @@ -784,13 +849,13 @@ cifs_lock_add_if(struct cifsFileInfo *cfile, struct cifsLockInfo *lock, try_again: exist = false; - mutex_lock(&cinode->lock_mutex); + down_write(&cinode->lock_sem); exist = cifs_find_lock_conflict(cfile, lock->offset, lock->length, - lock->type, &conf_lock); + lock->type, &conf_lock, false); if (!exist && cinode->can_cache_brlcks) { - list_add_tail(&lock->llist, &cfile->llist); - mutex_unlock(&cinode->lock_mutex); + list_add_tail(&lock->llist, &cfile->llist->locks); + up_write(&cinode->lock_sem); return rc; } @@ -800,17 +865,17 @@ try_again: rc = -EACCES; else { list_add_tail(&lock->blist, &conf_lock->blist); - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); rc = wait_event_interruptible(lock->block_q, (lock->blist.prev == &lock->blist) && (lock->blist.next == &lock->blist)); if (!rc) goto try_again; - mutex_lock(&cinode->lock_mutex); + down_write(&cinode->lock_sem); list_del_init(&lock->blist); } - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); return rc; } @@ -831,7 +896,7 @@ cifs_posix_lock_test(struct file *file, struct file_lock *flock) if ((flock->fl_flags & FL_POSIX) == 0) return 1; - mutex_lock(&cinode->lock_mutex); + down_read(&cinode->lock_sem); posix_test_lock(file, flock); if (flock->fl_type == F_UNLCK && !cinode->can_cache_brlcks) { @@ -839,7 +904,7 @@ cifs_posix_lock_test(struct file *file, struct file_lock *flock) rc = 1; } - mutex_unlock(&cinode->lock_mutex); + up_read(&cinode->lock_sem); return rc; } @@ -859,14 +924,14 @@ cifs_posix_lock_set(struct file *file, struct file_lock *flock) return rc; try_again: - mutex_lock(&cinode->lock_mutex); + down_write(&cinode->lock_sem); if (!cinode->can_cache_brlcks) { - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); return rc; } rc = posix_lock_file(file, flock, NULL); - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); if (rc == FILE_LOCK_DEFERRED) { rc = wait_event_interruptible(flock->fl_wait, !flock->fl_next); if (!rc) @@ -876,7 +941,7 @@ try_again: return rc; } -static int +int cifs_push_mandatory_locks(struct cifsFileInfo *cfile) { unsigned int xid; @@ -893,9 +958,10 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) xid = get_xid(); tcon = tlink_tcon(cfile->tlink); - mutex_lock(&cinode->lock_mutex); + /* we are going to update can_cache_brlcks here - need a write access */ + down_write(&cinode->lock_sem); if (!cinode->can_cache_brlcks) { - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); free_xid(xid); return rc; } @@ -906,7 +972,7 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) */ max_buf = tcon->ses->server->maxBuf; if (!max_buf) { - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); free_xid(xid); return -EINVAL; } @@ -915,15 +981,15 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) sizeof(LOCKING_ANDX_RANGE); buf = kzalloc(max_num * sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL); if (!buf) { - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); free_xid(xid); - return rc; + return -ENOMEM; } for (i = 0; i < 2; i++) { cur = buf; num = 0; - list_for_each_entry_safe(li, tmp, &cfile->llist, llist) { + list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) { if (li->type != types[i]) continue; cur->Pid = cpu_to_le16(li->pid); @@ -932,7 +998,8 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) cur->OffsetLow = cpu_to_le32((u32)li->offset); cur->OffsetHigh = cpu_to_le32((u32)(li->offset>>32)); if (++num == max_num) { - stored_rc = cifs_lockv(xid, tcon, cfile->netfid, + stored_rc = cifs_lockv(xid, tcon, + cfile->fid.netfid, (__u8)li->type, 0, num, buf); if (stored_rc) @@ -944,7 +1011,7 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) } if (num) { - stored_rc = cifs_lockv(xid, tcon, cfile->netfid, + stored_rc = cifs_lockv(xid, tcon, cfile->fid.netfid, (__u8)types[i], 0, num, buf); if (stored_rc) rc = stored_rc; @@ -952,7 +1019,7 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) } cinode->can_cache_brlcks = false; - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); kfree(buf); free_xid(xid); @@ -987,9 +1054,10 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) xid = get_xid(); - mutex_lock(&cinode->lock_mutex); + /* we are going to update can_cache_brlcks here - need a write access */ + down_write(&cinode->lock_sem); if (!cinode->can_cache_brlcks) { - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); free_xid(xid); return rc; } @@ -1005,7 +1073,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) /* * Allocating count locks is enough because no FL_POSIX locks can be - * added to the list while we are holding cinode->lock_mutex that + * added to the list while we are holding cinode->lock_sem that * protects locking operations of this inode. */ for (; i < count; i++) { @@ -1038,7 +1106,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) type = CIFS_WRLCK; lck = list_entry(el, struct lock_to_push, llist); lck->pid = flock->fl_pid; - lck->netfid = cfile->netfid; + lck->netfid = cfile->fid.netfid; lck->length = length; lck->type = type; lck->offset = flock->fl_start; @@ -1060,7 +1128,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) out: cinode->can_cache_brlcks = false; - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); free_xid(xid); return rc; @@ -1083,7 +1151,7 @@ cifs_push_locks(struct cifsFileInfo *cfile) ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) return cifs_push_posix_locks(cfile); - return cifs_push_mandatory_locks(cfile); + return tcon->ses->server->ops->push_mand_locks(cfile); } static void @@ -1104,7 +1172,8 @@ cifs_read_flock(struct file_lock *flock, __u32 *type, int *lock, int *unlock, if (flock->fl_flags & FL_LEASE) cFYI(1, "Lease on file - not implemented yet"); if (flock->fl_flags & - (~(FL_POSIX | FL_FLOCK | FL_SLEEP | FL_ACCESS | FL_LEASE))) + (~(FL_POSIX | FL_FLOCK | FL_SLEEP | + FL_ACCESS | FL_LEASE | FL_CLOSE))) cFYI(1, "Unknown lock flags 0x%x", flock->fl_flags); *type = server->vals->large_lock_type; @@ -1134,15 +1203,6 @@ cifs_read_flock(struct file_lock *flock, __u32 *type, int *lock, int *unlock, } static int -cifs_mandatory_lock(unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, - __u64 length, __u32 type, int lock, int unlock, bool wait) -{ - return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->netfid, - current->tgid, length, offset, unlock, lock, - (__u8)type, wait, 0); -} - -static int cifs_getlk(struct file *file, struct file_lock *flock, __u32 type, bool wait_flag, bool posix_lck, unsigned int xid) { @@ -1151,7 +1211,7 @@ cifs_getlk(struct file *file, struct file_lock *flock, __u32 type, struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data; struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct TCP_Server_Info *server = tcon->ses->server; - __u16 netfid = cfile->netfid; + __u16 netfid = cfile->fid.netfid; if (posix_lck) { int posix_lock_type; @@ -1175,11 +1235,11 @@ cifs_getlk(struct file *file, struct file_lock *flock, __u32 type, return rc; /* BB we could chain these into one lock request BB */ - rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, type, - 1, 0, false); + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, type, + 1, 0, false); if (rc == 0) { - rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, - type, 0, 1, false); + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, + type, 0, 1, false); flock->fl_type = F_UNLCK; if (rc != 0) cERROR(1, "Error unlocking previously locked " @@ -1192,13 +1252,14 @@ cifs_getlk(struct file *file, struct file_lock *flock, __u32 type, return 0; } - rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, - type | server->vals->shared_lock_type, 1, 0, - false); + type &= ~server->vals->exclusive_lock_type; + + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, + type | server->vals->shared_lock_type, + 1, 0, false); if (rc == 0) { - rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, - type | server->vals->shared_lock_type, - 0, 1, false); + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, + type | server->vals->shared_lock_type, 0, 1, false); flock->fl_type = F_RDLCK; if (rc != 0) cERROR(1, "Error unlocking previously locked " @@ -1209,7 +1270,7 @@ cifs_getlk(struct file *file, struct file_lock *flock, __u32 type, return 0; } -static void +void cifs_move_llist(struct list_head *source, struct list_head *dest) { struct list_head *li, *tmp; @@ -1217,7 +1278,7 @@ cifs_move_llist(struct list_head *source, struct list_head *dest) list_move(li, dest); } -static void +void cifs_free_llist(struct list_head *llist) { struct cifsLockInfo *li, *tmp; @@ -1228,7 +1289,7 @@ cifs_free_llist(struct list_head *llist) } } -static int +int cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, unsigned int xid) { @@ -1260,11 +1321,11 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, if (!buf) return -ENOMEM; - mutex_lock(&cinode->lock_mutex); + down_write(&cinode->lock_sem); for (i = 0; i < 2; i++) { cur = buf; num = 0; - list_for_each_entry_safe(li, tmp, &cfile->llist, llist) { + list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) { if (flock->fl_start > li->offset || (flock->fl_start + length) < (li->offset + li->length)) @@ -1295,7 +1356,8 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, */ list_move(&li->llist, &tmp_llist); if (++num == max_num) { - stored_rc = cifs_lockv(xid, tcon, cfile->netfid, + stored_rc = cifs_lockv(xid, tcon, + cfile->fid.netfid, li->type, num, 0, buf); if (stored_rc) { /* @@ -1304,7 +1366,7 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, * list to the head of the file's list. */ cifs_move_llist(&tmp_llist, - &cfile->llist); + &cfile->llist->locks); rc = stored_rc; } else /* @@ -1318,23 +1380,24 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, cur++; } if (num) { - stored_rc = cifs_lockv(xid, tcon, cfile->netfid, + stored_rc = cifs_lockv(xid, tcon, cfile->fid.netfid, types[i], num, 0, buf); if (stored_rc) { - cifs_move_llist(&tmp_llist, &cfile->llist); + cifs_move_llist(&tmp_llist, + &cfile->llist->locks); rc = stored_rc; } else cifs_free_llist(&tmp_llist); } } - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); kfree(buf); return rc; } static int -cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, +cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, bool wait_flag, bool posix_lck, int lock, int unlock, unsigned int xid) { @@ -1343,7 +1406,6 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data; struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct TCP_Server_Info *server = tcon->ses->server; - __u16 netfid = cfile->netfid; if (posix_lck) { int posix_lock_type; @@ -1360,9 +1422,9 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, if (unlock == 1) posix_lock_type = CIFS_UNLCK; - rc = CIFSSMBPosixLock(xid, tcon, netfid, current->tgid, - flock->fl_start, length, NULL, - posix_lock_type, wait_flag); + rc = CIFSSMBPosixLock(xid, tcon, cfile->fid.netfid, + current->tgid, flock->fl_start, length, + NULL, posix_lock_type, wait_flag); goto out; } @@ -1379,8 +1441,8 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, if (rc <= 0) goto out; - rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, - type, 1, 0, wait_flag); + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, + type, 1, 0, wait_flag); if (rc) { kfree(lock); goto out; @@ -1388,7 +1450,7 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, cifs_lock_add(cfile, lock); } else if (unlock) - rc = cifs_unlock_range(cfile, flock, xid); + rc = server->ops->mand_unlock_range(cfile, flock, xid); out: if (flock->fl_flags & FL_POSIX) @@ -1423,7 +1485,7 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *flock) tcon->ses->server); cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); - netfid = cfile->netfid; + netfid = cfile->fid.netfid; cinode = CIFS_I(file->f_path.dentry->d_inode); if (cap_unix(tcon->ses) && @@ -1469,15 +1531,16 @@ cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset, cifsi->server_eof = end_of_write; } -static ssize_t cifs_write(struct cifsFileInfo *open_file, __u32 pid, - const char *write_data, size_t write_size, - loff_t *poffset) +static ssize_t +cifs_write(struct cifsFileInfo *open_file, __u32 pid, const char *write_data, + size_t write_size, loff_t *offset) { int rc = 0; unsigned int bytes_written = 0; unsigned int total_written; struct cifs_sb_info *cifs_sb; - struct cifs_tcon *pTcon; + struct cifs_tcon *tcon; + struct TCP_Server_Info *server; unsigned int xid; struct dentry *dentry = open_file->dentry; struct cifsInodeInfo *cifsi = CIFS_I(dentry->d_inode); @@ -1486,9 +1549,13 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file, __u32 pid, cifs_sb = CIFS_SB(dentry->d_sb); cFYI(1, "write %zd bytes to offset %lld of %s", write_size, - *poffset, dentry->d_name.name); + *offset, dentry->d_name.name); - pTcon = tlink_tcon(open_file->tlink); + tcon = tlink_tcon(open_file->tlink); + server = tcon->ses->server; + + if (!server->ops->sync_write) + return -ENOSYS; xid = get_xid(); @@ -1514,13 +1581,12 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file, __u32 pid, /* iov[0] is reserved for smb header */ iov[1].iov_base = (char *)write_data + total_written; iov[1].iov_len = len; - io_parms.netfid = open_file->netfid; io_parms.pid = pid; - io_parms.tcon = pTcon; - io_parms.offset = *poffset; + io_parms.tcon = tcon; + io_parms.offset = *offset; io_parms.length = len; - rc = CIFSSMBWrite2(xid, &io_parms, &bytes_written, iov, - 1, 0); + rc = server->ops->sync_write(xid, open_file, &io_parms, + &bytes_written, iov, 1); } if (rc || (bytes_written == 0)) { if (total_written) @@ -1531,18 +1597,18 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file, __u32 pid, } } else { spin_lock(&dentry->d_inode->i_lock); - cifs_update_eof(cifsi, *poffset, bytes_written); + cifs_update_eof(cifsi, *offset, bytes_written); spin_unlock(&dentry->d_inode->i_lock); - *poffset += bytes_written; + *offset += bytes_written; } } - cifs_stats_bytes_written(pTcon, total_written); + cifs_stats_bytes_written(tcon, total_written); if (total_written > 0) { spin_lock(&dentry->d_inode->i_lock); - if (*poffset > dentry->d_inode->i_size) - i_size_write(dentry->d_inode, *poffset); + if (*offset > dentry->d_inode->i_size) + i_size_write(dentry->d_inode, *offset); spin_unlock(&dentry->d_inode->i_lock); } mark_inode_dirty_sync(dentry->d_inode); @@ -1718,27 +1784,6 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to) return rc; } -/* - * Marshal up the iov array, reserving the first one for the header. Also, - * set wdata->bytes. - */ -static void -cifs_writepages_marshal_iov(struct kvec *iov, struct cifs_writedata *wdata) -{ - int i; - struct inode *inode = wdata->cfile->dentry->d_inode; - loff_t size = i_size_read(inode); - - /* marshal up the pages into iov array */ - wdata->bytes = 0; - for (i = 0; i < wdata->nr_pages; i++) { - iov[i + 1].iov_len = min(size - page_offset(wdata->pages[i]), - (loff_t)PAGE_CACHE_SIZE); - iov[i + 1].iov_base = kmap(wdata->pages[i]); - wdata->bytes += iov[i + 1].iov_len; - } -} - static int cifs_writepages(struct address_space *mapping, struct writeback_control *wbc) { @@ -1746,8 +1791,10 @@ static int cifs_writepages(struct address_space *mapping, bool done = false, scanned = false, range_whole = false; pgoff_t end, index; struct cifs_writedata *wdata; + struct TCP_Server_Info *server; struct page *page; int rc = 0; + loff_t isize = i_size_read(mapping->host); /* * If wsize is smaller than the page cache size, default to writing @@ -1852,7 +1899,7 @@ retry: */ set_page_writeback(page); - if (page_offset(page) >= mapping->host->i_size) { + if (page_offset(page) >= isize) { done = true; unlock_page(page); end_page_writeback(page); @@ -1883,7 +1930,12 @@ retry: wdata->sync_mode = wbc->sync_mode; wdata->nr_pages = nr_pages; wdata->offset = page_offset(wdata->pages[0]); - wdata->marshal_iov = cifs_writepages_marshal_iov; + wdata->pagesz = PAGE_CACHE_SIZE; + wdata->tailsz = + min(isize - page_offset(wdata->pages[nr_pages - 1]), + (loff_t)PAGE_CACHE_SIZE); + wdata->bytes = ((nr_pages - 1) * PAGE_CACHE_SIZE) + + wdata->tailsz; do { if (wdata->cfile != NULL) @@ -1896,7 +1948,8 @@ retry: break; } wdata->pid = wdata->cfile->pid; - rc = cifs_async_writev(wdata); + server = tlink_tcon(wdata->cfile->tlink)->ses->server; + rc = server->ops->async_writev(wdata); } while (wbc->sync_mode == WB_SYNC_ALL && rc == -EAGAIN); for (i = 0; i < nr_pages; ++i) @@ -2054,6 +2107,7 @@ int cifs_strict_fsync(struct file *file, loff_t start, loff_t end, unsigned int xid; int rc = 0; struct cifs_tcon *tcon; + struct TCP_Server_Info *server; struct cifsFileInfo *smbfile = file->private_data; struct inode *inode = file->f_path.dentry->d_inode; struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); @@ -2077,8 +2131,13 @@ int cifs_strict_fsync(struct file *file, loff_t start, loff_t end, } tcon = tlink_tcon(smbfile->tlink); - if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) - rc = CIFSSMBFlush(xid, tcon, smbfile->netfid); + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { + server = tcon->ses->server; + if (server->ops->flush) + rc = server->ops->flush(xid, tcon, &smbfile->fid); + else + rc = -ENOSYS; + } free_xid(xid); mutex_unlock(&inode->i_mutex); @@ -2090,6 +2149,7 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync) unsigned int xid; int rc = 0; struct cifs_tcon *tcon; + struct TCP_Server_Info *server; struct cifsFileInfo *smbfile = file->private_data; struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); struct inode *inode = file->f_mapping->host; @@ -2105,8 +2165,13 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync) file->f_path.dentry->d_name.name, datasync); tcon = tlink_tcon(smbfile->tlink); - if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) - rc = CIFSSMBFlush(xid, tcon, smbfile->netfid); + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { + server = tcon->ses->server; + if (server->ops->flush) + rc = server->ops->flush(xid, tcon, &smbfile->fid); + else + rc = -ENOSYS; + } free_xid(xid); mutex_unlock(&inode->i_mutex); @@ -2172,20 +2237,6 @@ size_t get_numpages(const size_t wsize, const size_t len, size_t *cur_len) } static void -cifs_uncached_marshal_iov(struct kvec *iov, struct cifs_writedata *wdata) -{ - int i; - size_t bytes = wdata->bytes; - - /* marshal up the pages into iov array */ - for (i = 0; i < wdata->nr_pages; i++) { - iov[i + 1].iov_len = min_t(size_t, bytes, PAGE_SIZE); - iov[i + 1].iov_base = kmap(wdata->pages[i]); - bytes -= iov[i + 1].iov_len; - } -} - -static void cifs_uncached_writev_complete(struct work_struct *work) { int i; @@ -2215,6 +2266,9 @@ static int cifs_uncached_retry_writev(struct cifs_writedata *wdata) { int rc; + struct TCP_Server_Info *server; + + server = tlink_tcon(wdata->cfile->tlink)->ses->server; do { if (wdata->cfile->invalidHandle) { @@ -2222,7 +2276,7 @@ cifs_uncached_retry_writev(struct cifs_writedata *wdata) if (rc != 0) continue; } - rc = cifs_async_writev(wdata); + rc = server->ops->async_writev(wdata); } while (rc == -EAGAIN); return rc; @@ -2257,6 +2311,10 @@ cifs_iovec_write(struct file *file, const struct iovec *iov, cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); open_file = file->private_data; tcon = tlink_tcon(open_file->tlink); + + if (!tcon->ses->server->ops->async_writev) + return -ENOSYS; + offset = *poffset; if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) @@ -2298,7 +2356,8 @@ cifs_iovec_write(struct file *file, const struct iovec *iov, wdata->cfile = cifsFileInfo_get(open_file); wdata->pid = pid; wdata->bytes = cur_len; - wdata->marshal_iov = cifs_uncached_marshal_iov; + wdata->pagesz = PAGE_SIZE; + wdata->tailsz = cur_len - ((nr_pages - 1) * PAGE_SIZE); rc = cifs_uncached_retry_writev(wdata); if (rc) { kref_put(&wdata->refcount, cifs_writedata_release); @@ -2376,40 +2435,110 @@ ssize_t cifs_user_writev(struct kiocb *iocb, const struct iovec *iov, return written; } -ssize_t cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +static ssize_t +cifs_writev(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) { - struct inode *inode; + struct file *file = iocb->ki_filp; + struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data; + struct inode *inode = file->f_mapping->host; + struct cifsInodeInfo *cinode = CIFS_I(inode); + struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; + ssize_t rc = -EACCES; - inode = iocb->ki_filp->f_path.dentry->d_inode; + BUG_ON(iocb->ki_pos != pos); - if (CIFS_I(inode)->clientCanCacheAll) - return generic_file_aio_write(iocb, iov, nr_segs, pos); + sb_start_write(inode->i_sb); /* - * In strict cache mode we need to write the data to the server exactly - * from the pos to pos+len-1 rather than flush all affected pages - * because it may cause a error with mandatory locks on these pages but - * not on the region from pos to ppos+len-1. + * We need to hold the sem to be sure nobody modifies lock list + * with a brlock that prevents writing. */ + down_read(&cinode->lock_sem); + if (!cifs_find_lock_conflict(cfile, pos, iov_length(iov, nr_segs), + server->vals->exclusive_lock_type, NULL, + true)) { + mutex_lock(&inode->i_mutex); + rc = __generic_file_aio_write(iocb, iov, nr_segs, + &iocb->ki_pos); + mutex_unlock(&inode->i_mutex); + } - return cifs_user_writev(iocb, iov, nr_segs, pos); + if (rc > 0 || rc == -EIOCBQUEUED) { + ssize_t err; + + err = generic_write_sync(file, pos, rc); + if (err < 0 && rc > 0) + rc = err; + } + + up_read(&cinode->lock_sem); + sb_end_write(inode->i_sb); + return rc; +} + +ssize_t +cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) +{ + struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; + struct cifsInodeInfo *cinode = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct cifsFileInfo *cfile = (struct cifsFileInfo *) + iocb->ki_filp->private_data; + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + +#ifdef CONFIG_CIFS_SMB2 + /* + * If we have an oplock for read and want to write a data to the file + * we need to store it in the page cache and then push it to the server + * to be sure the next read will get a valid data. + */ + if (!cinode->clientCanCacheAll && cinode->clientCanCacheRead) { + ssize_t written; + int rc; + + written = generic_file_aio_write(iocb, iov, nr_segs, pos); + rc = filemap_fdatawrite(inode->i_mapping); + if (rc) + return (ssize_t)rc; + + return written; + } +#endif + + /* + * For non-oplocked files in strict cache mode we need to write the data + * to the server exactly from the pos to pos+len-1 rather than flush all + * affected pages because it may cause a error with mandatory locks on + * these pages but not on the region from pos to ppos+len-1. + */ + + if (!cinode->clientCanCacheAll) + return cifs_user_writev(iocb, iov, nr_segs, pos); + + if (cap_unix(tcon->ses) && + (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && + ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) + return generic_file_aio_write(iocb, iov, nr_segs, pos); + + return cifs_writev(iocb, iov, nr_segs, pos); } static struct cifs_readdata * -cifs_readdata_alloc(unsigned int nr_vecs, work_func_t complete) +cifs_readdata_alloc(unsigned int nr_pages, work_func_t complete) { struct cifs_readdata *rdata; - rdata = kzalloc(sizeof(*rdata) + - sizeof(struct kvec) * nr_vecs, GFP_KERNEL); + rdata = kzalloc(sizeof(*rdata) + (sizeof(struct page *) * nr_pages), + GFP_KERNEL); if (rdata != NULL) { kref_init(&rdata->refcount); INIT_LIST_HEAD(&rdata->list); init_completion(&rdata->done); INIT_WORK(&rdata->work, complete); - INIT_LIST_HEAD(&rdata->pages); } + return rdata; } @@ -2426,25 +2555,25 @@ cifs_readdata_release(struct kref *refcount) } static int -cifs_read_allocate_pages(struct list_head *list, unsigned int npages) +cifs_read_allocate_pages(struct cifs_readdata *rdata, unsigned int nr_pages) { int rc = 0; - struct page *page, *tpage; + struct page *page; unsigned int i; - for (i = 0; i < npages; i++) { + for (i = 0; i < nr_pages; i++) { page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); if (!page) { rc = -ENOMEM; break; } - list_add(&page->lru, list); + rdata->pages[i] = page; } if (rc) { - list_for_each_entry_safe(page, tpage, list, lru) { - list_del(&page->lru); - put_page(page); + for (i = 0; i < nr_pages; i++) { + put_page(rdata->pages[i]); + rdata->pages[i] = NULL; } } return rc; @@ -2453,13 +2582,13 @@ cifs_read_allocate_pages(struct list_head *list, unsigned int npages) static void cifs_uncached_readdata_release(struct kref *refcount) { - struct page *page, *tpage; struct cifs_readdata *rdata = container_of(refcount, struct cifs_readdata, refcount); + unsigned int i; - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { - list_del(&page->lru); - put_page(page); + for (i = 0; i < rdata->nr_pages; i++) { + put_page(rdata->pages[i]); + rdata->pages[i] = NULL; } cifs_readdata_release(refcount); } @@ -2468,6 +2597,9 @@ static int cifs_retry_async_readv(struct cifs_readdata *rdata) { int rc; + struct TCP_Server_Info *server; + + server = tlink_tcon(rdata->cfile->tlink)->ses->server; do { if (rdata->cfile->invalidHandle) { @@ -2475,7 +2607,7 @@ cifs_retry_async_readv(struct cifs_readdata *rdata) if (rc != 0) continue; } - rc = cifs_async_readv(rdata); + rc = server->ops->async_readv(rdata); } while (rc == -EAGAIN); return rc; @@ -2500,17 +2632,18 @@ cifs_readdata_to_iov(struct cifs_readdata *rdata, const struct iovec *iov, int rc = 0; struct iov_iter ii; size_t pos = rdata->offset - offset; - struct page *page, *tpage; ssize_t remaining = rdata->bytes; unsigned char *pdata; + unsigned int i; /* set up iov_iter and advance to the correct offset */ iov_iter_init(&ii, iov, nr_segs, iov_length(iov, nr_segs), 0); iov_iter_advance(&ii, pos); *copied = 0; - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { + for (i = 0; i < rdata->nr_pages; i++) { ssize_t copy; + struct page *page = rdata->pages[i]; /* copy a whole page or whatever's left */ copy = min_t(ssize_t, remaining, PAGE_SIZE); @@ -2530,9 +2663,6 @@ cifs_readdata_to_iov(struct cifs_readdata *rdata, const struct iovec *iov, iov_iter_advance(&ii, copy); } } - - list_del(&page->lru); - put_page(page); } return rc; @@ -2544,59 +2674,56 @@ cifs_uncached_readv_complete(struct work_struct *work) struct cifs_readdata *rdata = container_of(work, struct cifs_readdata, work); - /* if the result is non-zero then the pages weren't kmapped */ - if (rdata->result == 0) { - struct page *page; - - list_for_each_entry(page, &rdata->pages, lru) - kunmap(page); - } - complete(&rdata->done); kref_put(&rdata->refcount, cifs_uncached_readdata_release); } static int -cifs_uncached_read_marshal_iov(struct cifs_readdata *rdata, - unsigned int remaining) +cifs_uncached_read_into_pages(struct TCP_Server_Info *server, + struct cifs_readdata *rdata, unsigned int len) { - int len = 0; - struct page *page, *tpage; + int total_read = 0, result = 0; + unsigned int i; + unsigned int nr_pages = rdata->nr_pages; + struct kvec iov; + + rdata->tailsz = PAGE_SIZE; + for (i = 0; i < nr_pages; i++) { + struct page *page = rdata->pages[i]; - rdata->nr_iov = 1; - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { - if (remaining >= PAGE_SIZE) { + if (len >= PAGE_SIZE) { /* enough data to fill the page */ - rdata->iov[rdata->nr_iov].iov_base = kmap(page); - rdata->iov[rdata->nr_iov].iov_len = PAGE_SIZE; - cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu", - rdata->nr_iov, page->index, - rdata->iov[rdata->nr_iov].iov_base, - rdata->iov[rdata->nr_iov].iov_len); - ++rdata->nr_iov; - len += PAGE_SIZE; - remaining -= PAGE_SIZE; - } else if (remaining > 0) { + iov.iov_base = kmap(page); + iov.iov_len = PAGE_SIZE; + cFYI(1, "%u: iov_base=%p iov_len=%zu", + i, iov.iov_base, iov.iov_len); + len -= PAGE_SIZE; + } else if (len > 0) { /* enough for partial page, fill and zero the rest */ - rdata->iov[rdata->nr_iov].iov_base = kmap(page); - rdata->iov[rdata->nr_iov].iov_len = remaining; - cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu", - rdata->nr_iov, page->index, - rdata->iov[rdata->nr_iov].iov_base, - rdata->iov[rdata->nr_iov].iov_len); - memset(rdata->iov[rdata->nr_iov].iov_base + remaining, - '\0', PAGE_SIZE - remaining); - ++rdata->nr_iov; - len += remaining; - remaining = 0; + iov.iov_base = kmap(page); + iov.iov_len = len; + cFYI(1, "%u: iov_base=%p iov_len=%zu", + i, iov.iov_base, iov.iov_len); + memset(iov.iov_base + len, '\0', PAGE_SIZE - len); + rdata->tailsz = len; + len = 0; } else { /* no need to hold page hostage */ - list_del(&page->lru); + rdata->pages[i] = NULL; + rdata->nr_pages--; put_page(page); + continue; } + + result = cifs_readv_from_socket(server, &iov, 1, iov.iov_len); + kunmap(page); + if (result < 0) + break; + + total_read += result; } - return len; + return total_read > 0 ? total_read : result; } static ssize_t @@ -2627,6 +2754,9 @@ cifs_iovec_read(struct file *file, const struct iovec *iov, open_file = file->private_data; tcon = tlink_tcon(open_file->tlink); + if (!tcon->ses->server->ops->async_readv) + return -ENOSYS; + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) pid = open_file->pid; else @@ -2647,15 +2777,17 @@ cifs_iovec_read(struct file *file, const struct iovec *iov, goto error; } - rc = cifs_read_allocate_pages(&rdata->pages, npages); + rc = cifs_read_allocate_pages(rdata, npages); if (rc) goto error; rdata->cfile = cifsFileInfo_get(open_file); + rdata->nr_pages = npages; rdata->offset = offset; rdata->bytes = cur_len; rdata->pid = pid; - rdata->marshal_iov = cifs_uncached_read_marshal_iov; + rdata->pagesz = PAGE_SIZE; + rdata->read_into_pages = cifs_uncached_read_into_pages; rc = cifs_retry_async_readv(rdata); error: @@ -2706,6 +2838,10 @@ restart_loop: cifs_stats_bytes_read(tcon, total_read); *poffset += total_read; + /* mask nodata case */ + if (rc == -ENODATA) + rc = 0; + return total_read ? total_read : rc; } @@ -2721,15 +2857,17 @@ ssize_t cifs_user_readv(struct kiocb *iocb, const struct iovec *iov, return read; } -ssize_t cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +ssize_t +cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) { - struct inode *inode; - - inode = iocb->ki_filp->f_path.dentry->d_inode; - - if (CIFS_I(inode)->clientCanCacheRead) - return generic_file_aio_read(iocb, iov, nr_segs, pos); + struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; + struct cifsInodeInfo *cinode = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct cifsFileInfo *cfile = (struct cifsFileInfo *) + iocb->ki_filp->private_data; + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + int rc = -EACCES; /* * In strict cache mode we need to read from the server all the time @@ -2739,12 +2877,29 @@ ssize_t cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov, * on pages affected by this read but not on the region from pos to * pos+len-1. */ + if (!cinode->clientCanCacheRead) + return cifs_user_readv(iocb, iov, nr_segs, pos); + + if (cap_unix(tcon->ses) && + (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && + ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) + return generic_file_aio_read(iocb, iov, nr_segs, pos); - return cifs_user_readv(iocb, iov, nr_segs, pos); + /* + * We need to hold the sem to be sure nobody modifies lock list + * with a brlock that prevents reading. + */ + down_read(&cinode->lock_sem); + if (!cifs_find_lock_conflict(cfile, pos, iov_length(iov, nr_segs), + tcon->ses->server->vals->shared_lock_type, + NULL, true)) + rc = generic_file_aio_read(iocb, iov, nr_segs, pos); + up_read(&cinode->lock_sem); + return rc; } -static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, - loff_t *poffset) +static ssize_t +cifs_read(struct file *file, char *read_data, size_t read_size, loff_t *offset) { int rc = -EACCES; unsigned int bytes_read = 0; @@ -2753,8 +2908,9 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, unsigned int rsize; struct cifs_sb_info *cifs_sb; struct cifs_tcon *tcon; + struct TCP_Server_Info *server; unsigned int xid; - char *current_offset; + char *cur_offset; struct cifsFileInfo *open_file; struct cifs_io_parms io_parms; int buf_type = CIFS_NO_BUFFER; @@ -2773,6 +2929,12 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, } open_file = file->private_data; tcon = tlink_tcon(open_file->tlink); + server = tcon->ses->server; + + if (!server->ops->sync_read) { + free_xid(xid); + return -ENOSYS; + } if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) pid = open_file->pid; @@ -2782,9 +2944,8 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, if ((file->f_flags & O_ACCMODE) == O_WRONLY) cFYI(1, "attempting read on write only file instance"); - for (total_read = 0, current_offset = read_data; - read_size > total_read; - total_read += bytes_read, current_offset += bytes_read) { + for (total_read = 0, cur_offset = read_data; read_size > total_read; + total_read += bytes_read, cur_offset += bytes_read) { current_read_size = min_t(uint, read_size - total_read, rsize); /* * For windows me and 9x we do not want to request more than it @@ -2802,13 +2963,13 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, if (rc != 0) break; } - io_parms.netfid = open_file->netfid; io_parms.pid = pid; io_parms.tcon = tcon; - io_parms.offset = *poffset; + io_parms.offset = *offset; io_parms.length = current_read_size; - rc = CIFSSMBRead(xid, &io_parms, &bytes_read, - ¤t_offset, &buf_type); + rc = server->ops->sync_read(xid, open_file, &io_parms, + &bytes_read, &cur_offset, + &buf_type); } if (rc || (bytes_read == 0)) { if (total_read) { @@ -2819,7 +2980,7 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, } } else { cifs_stats_bytes_read(tcon, total_read); - *poffset += bytes_read; + *offset += bytes_read; } } free_xid(xid); @@ -2842,6 +3003,7 @@ cifs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) static struct vm_operations_struct cifs_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = cifs_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma) @@ -2885,16 +3047,16 @@ int cifs_file_mmap(struct file *file, struct vm_area_struct *vma) static void cifs_readv_complete(struct work_struct *work) { + unsigned int i; struct cifs_readdata *rdata = container_of(work, struct cifs_readdata, work); - struct page *page, *tpage; - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { - list_del(&page->lru); + for (i = 0; i < rdata->nr_pages; i++) { + struct page *page = rdata->pages[i]; + lru_cache_add_file(page); if (rdata->result == 0) { - kunmap(page); flush_dcache_page(page); SetPageUptodate(page); } @@ -2905,49 +3067,48 @@ cifs_readv_complete(struct work_struct *work) cifs_readpage_to_fscache(rdata->mapping->host, page); page_cache_release(page); + rdata->pages[i] = NULL; } kref_put(&rdata->refcount, cifs_readdata_release); } static int -cifs_readpages_marshal_iov(struct cifs_readdata *rdata, unsigned int remaining) +cifs_readpages_read_into_pages(struct TCP_Server_Info *server, + struct cifs_readdata *rdata, unsigned int len) { - int len = 0; - struct page *page, *tpage; + int total_read = 0, result = 0; + unsigned int i; u64 eof; pgoff_t eof_index; + unsigned int nr_pages = rdata->nr_pages; + struct kvec iov; /* determine the eof that the server (probably) has */ eof = CIFS_I(rdata->mapping->host)->server_eof; eof_index = eof ? (eof - 1) >> PAGE_CACHE_SHIFT : 0; cFYI(1, "eof=%llu eof_index=%lu", eof, eof_index); - rdata->nr_iov = 1; - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { - if (remaining >= PAGE_CACHE_SIZE) { + rdata->tailsz = PAGE_CACHE_SIZE; + for (i = 0; i < nr_pages; i++) { + struct page *page = rdata->pages[i]; + + if (len >= PAGE_CACHE_SIZE) { /* enough data to fill the page */ - rdata->iov[rdata->nr_iov].iov_base = kmap(page); - rdata->iov[rdata->nr_iov].iov_len = PAGE_CACHE_SIZE; + iov.iov_base = kmap(page); + iov.iov_len = PAGE_CACHE_SIZE; cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu", - rdata->nr_iov, page->index, - rdata->iov[rdata->nr_iov].iov_base, - rdata->iov[rdata->nr_iov].iov_len); - ++rdata->nr_iov; - len += PAGE_CACHE_SIZE; - remaining -= PAGE_CACHE_SIZE; - } else if (remaining > 0) { + i, page->index, iov.iov_base, iov.iov_len); + len -= PAGE_CACHE_SIZE; + } else if (len > 0) { /* enough for partial page, fill and zero the rest */ - rdata->iov[rdata->nr_iov].iov_base = kmap(page); - rdata->iov[rdata->nr_iov].iov_len = remaining; + iov.iov_base = kmap(page); + iov.iov_len = len; cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu", - rdata->nr_iov, page->index, - rdata->iov[rdata->nr_iov].iov_base, - rdata->iov[rdata->nr_iov].iov_len); - memset(rdata->iov[rdata->nr_iov].iov_base + remaining, - '\0', PAGE_CACHE_SIZE - remaining); - ++rdata->nr_iov; - len += remaining; - remaining = 0; + i, page->index, iov.iov_base, iov.iov_len); + memset(iov.iov_base + len, + '\0', PAGE_CACHE_SIZE - len); + rdata->tailsz = len; + len = 0; } else if (page->index > eof_index) { /* * The VFS will not try to do readahead past the @@ -2958,22 +3119,33 @@ cifs_readpages_marshal_iov(struct cifs_readdata *rdata, unsigned int remaining) * fill them until the writes are flushed. */ zero_user(page, 0, PAGE_CACHE_SIZE); - list_del(&page->lru); lru_cache_add_file(page); flush_dcache_page(page); SetPageUptodate(page); unlock_page(page); page_cache_release(page); + rdata->pages[i] = NULL; + rdata->nr_pages--; + continue; } else { /* no need to hold page hostage */ - list_del(&page->lru); lru_cache_add_file(page); unlock_page(page); page_cache_release(page); + rdata->pages[i] = NULL; + rdata->nr_pages--; + continue; } + + result = cifs_readv_from_socket(server, &iov, 1, iov.iov_len); + kunmap(page); + if (result < 0) + break; + + total_read += result; } - return len; + return total_read > 0 ? total_read : result; } static int cifs_readpages(struct file *file, struct address_space *mapping, @@ -3027,6 +3199,7 @@ static int cifs_readpages(struct file *file, struct address_space *mapping, * the rdata->pages, then we want them in increasing order. */ while (!list_empty(page_list)) { + unsigned int i; unsigned int bytes = PAGE_CACHE_SIZE; unsigned int expected_index; unsigned int nr_pages = 1; @@ -3096,14 +3269,18 @@ static int cifs_readpages(struct file *file, struct address_space *mapping, rdata->offset = offset; rdata->bytes = bytes; rdata->pid = pid; - rdata->marshal_iov = cifs_readpages_marshal_iov; - list_splice_init(&tmplist, &rdata->pages); + rdata->pagesz = PAGE_CACHE_SIZE; + rdata->read_into_pages = cifs_readpages_read_into_pages; + + list_for_each_entry_safe(page, tpage, &tmplist, lru) { + list_del(&page->lru); + rdata->pages[rdata->nr_pages++] = page; + } rc = cifs_retry_async_readv(rdata); if (rc != 0) { - list_for_each_entry_safe(page, tpage, &rdata->pages, - lru) { - list_del(&page->lru); + for (i = 0; i < rdata->nr_pages; i++) { + page = rdata->pages[i]; lru_cache_add_file(page); unlock_page(page); page_cache_release(page); @@ -3347,6 +3524,7 @@ void cifs_oplock_break(struct work_struct *work) oplock_break); struct inode *inode = cfile->dentry->d_inode; struct cifsInodeInfo *cinode = CIFS_I(inode); + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); int rc = 0; if (inode && S_ISREG(inode->i_mode)) { @@ -3374,10 +3552,8 @@ void cifs_oplock_break(struct work_struct *work) * disconnected since oplock already released by the server */ if (!cfile->oplock_break_cancelled) { - rc = CIFSSMBLock(0, tlink_tcon(cfile->tlink), cfile->netfid, - current->tgid, 0, 0, 0, 0, - LOCKING_ANDX_OPLOCK_RELEASE, false, - cinode->clientCanCacheRead ? 1 : 0); + rc = tcon->ses->server->ops->oplock_response(tcon, &cfile->fid, + cinode); cFYI(1, "Oplock release rc = %d", rc); } } diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 7354877..afdff79 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -124,10 +124,10 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) { struct cifsInodeInfo *cifs_i = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); - unsigned long oldtime = cifs_i->time; cifs_revalidate_cache(inode, fattr); + spin_lock(&inode->i_lock); inode->i_atime = fattr->cf_atime; inode->i_mtime = fattr->cf_mtime; inode->i_ctime = fattr->cf_ctime; @@ -148,9 +148,6 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) else cifs_i->time = jiffies; - cFYI(1, "inode 0x%p old_time=%ld new_time=%ld", inode, - oldtime, cifs_i->time); - cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING; cifs_i->server_eof = fattr->cf_eof; @@ -158,7 +155,6 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) * Can't safely change the file size here if the client is writing to * it due to potential races. */ - spin_lock(&inode->i_lock); if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { i_size_write(inode, fattr->cf_eof); @@ -286,7 +282,8 @@ cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL; } -int cifs_get_file_info_unix(struct file *filp) +static int +cifs_get_file_info_unix(struct file *filp) { int rc; unsigned int xid; @@ -298,7 +295,7 @@ int cifs_get_file_info_unix(struct file *filp) struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); xid = get_xid(); - rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->netfid, &find_data); + rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); if (!rc) { cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); } else if (rc == -EREMOTE) { @@ -554,7 +551,8 @@ cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, fattr->cf_gid = cifs_sb->mnt_gid; } -int cifs_get_file_info(struct file *filp) +static int +cifs_get_file_info(struct file *filp) { int rc; unsigned int xid; @@ -564,9 +562,13 @@ int cifs_get_file_info(struct file *filp) struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifsFileInfo *cfile = filp->private_data; struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + struct TCP_Server_Info *server = tcon->ses->server; + + if (!server->ops->query_file_info) + return -ENOSYS; xid = get_xid(); - rc = CIFSSMBQFileInfo(xid, tcon, cfile->netfid, &find_data); + rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data); switch (rc) { case 0: cifs_all_info_to_fattr(&fattr, &find_data, cifs_sb, false); @@ -605,7 +607,9 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, FILE_ALL_INFO *data, struct super_block *sb, int xid, const __u16 *fid) { - int rc = 0, tmprc; + bool validinum = false; + __u16 srchflgs; + int rc = 0, tmprc = ENOSYS; struct cifs_tcon *tcon; struct TCP_Server_Info *server; struct tcon_link *tlink; @@ -613,6 +617,7 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, char *buf = NULL; bool adjust_tz = false; struct cifs_fattr fattr; + struct cifs_search_info *srchinf = NULL; tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) @@ -651,9 +656,38 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, } else if (rc == -EREMOTE) { cifs_create_dfs_fattr(&fattr, sb); rc = 0; - } else { + } else if (rc == -EACCES && backup_cred(cifs_sb)) { + srchinf = kzalloc(sizeof(struct cifs_search_info), + GFP_KERNEL); + if (srchinf == NULL) { + rc = -ENOMEM; + goto cgii_exit; + } + + srchinf->endOfSearch = false; + srchinf->info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; + + srchflgs = CIFS_SEARCH_CLOSE_ALWAYS | + CIFS_SEARCH_CLOSE_AT_END | + CIFS_SEARCH_BACKUP_SEARCH; + + rc = CIFSFindFirst(xid, tcon, full_path, + cifs_sb, NULL, srchflgs, srchinf, false); + if (!rc) { + data = + (FILE_ALL_INFO *)srchinf->srch_entries_start; + + cifs_dir_info_to_fattr(&fattr, + (FILE_DIRECTORY_INFO *)data, cifs_sb); + fattr.cf_uniqueid = le64_to_cpu( + ((SEARCH_ID_FULL_DIR_INFO *)data)->UniqueId); + validinum = true; + + cifs_buf_release(srchinf->ntwrk_buf_start); + } + kfree(srchinf); + } else goto cgii_exit; - } /* * If an inode wasn't passed in, then get the inode number @@ -664,23 +698,21 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, */ if (*inode == NULL) { if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { - if (server->ops->get_srv_inum) - tmprc = server->ops->get_srv_inum(xid, tcon, - cifs_sb, full_path, &fattr.cf_uniqueid, - data); - else - tmprc = -ENOSYS; - if (tmprc || !fattr.cf_uniqueid) { - cFYI(1, "GetSrvInodeNum rc %d", tmprc); - fattr.cf_uniqueid = iunique(sb, ROOT_I); - cifs_autodisable_serverino(cifs_sb); + if (validinum == false) { + if (server->ops->get_srv_inum) + tmprc = server->ops->get_srv_inum(xid, + tcon, cifs_sb, full_path, + &fattr.cf_uniqueid, data); + if (tmprc) { + cFYI(1, "GetSrvInodeNum rc %d", tmprc); + fattr.cf_uniqueid = iunique(sb, ROOT_I); + cifs_autodisable_serverino(cifs_sb); + } } - } else { + } else fattr.cf_uniqueid = iunique(sb, ROOT_I); - } - } else { + } else fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid; - } /* query for SFU type info if supported and needed */ if (fattr.cf_cifsattrs & ATTR_SYSTEM && @@ -859,12 +891,14 @@ struct inode *cifs_root_iget(struct super_block *sb) if (rc && tcon->ipc) { cFYI(1, "ipc connection - fake read inode"); + spin_lock(&inode->i_lock); inode->i_mode |= S_IFDIR; set_nlink(inode, 2); inode->i_op = &cifs_ipc_inode_ops; inode->i_fop = &simple_dir_operations; inode->i_uid = cifs_sb->mnt_uid; inode->i_gid = cifs_sb->mnt_gid; + spin_unlock(&inode->i_lock); } else if (rc) { iget_failed(inode); inode = ERR_PTR(rc); @@ -878,25 +912,22 @@ out: return inode; } -static int +int cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, - char *full_path, __u32 dosattr) + char *full_path, __u32 dosattr) { - int rc; - int oplock = 0; - __u16 netfid; - __u32 netpid; bool set_time = false; - struct cifsFileInfo *open_file; - struct cifsInodeInfo *cifsInode = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); - struct tcon_link *tlink = NULL; - struct cifs_tcon *pTcon; + struct TCP_Server_Info *server; FILE_BASIC_INFO info_buf; if (attrs == NULL) return -EINVAL; + server = cifs_sb_master_tcon(cifs_sb)->ses->server; + if (!server->ops->set_file_info) + return -ENOSYS; + if (attrs->ia_valid & ATTR_ATIME) { set_time = true; info_buf.LastAccessTime = @@ -927,81 +958,17 @@ cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, info_buf.CreationTime = 0; /* don't change */ info_buf.Attributes = cpu_to_le32(dosattr); - /* - * If the file is already open for write, just use that fileid - */ - open_file = find_writable_file(cifsInode, true); - if (open_file) { - netfid = open_file->netfid; - netpid = open_file->pid; - pTcon = tlink_tcon(open_file->tlink); - goto set_via_filehandle; - } - - tlink = cifs_sb_tlink(cifs_sb); - if (IS_ERR(tlink)) { - rc = PTR_ERR(tlink); - tlink = NULL; - goto out; - } - pTcon = tlink_tcon(tlink); - - /* - * NT4 apparently returns success on this call, but it doesn't - * really work. - */ - if (!(pTcon->ses->flags & CIFS_SES_NT4)) { - rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, - &info_buf, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - if (rc == 0) { - cifsInode->cifsAttrs = dosattr; - goto out; - } else if (rc != -EOPNOTSUPP && rc != -EINVAL) - goto out; - } - - cFYI(1, "calling SetFileInfo since SetPathInfo for " - "times not supported by this server"); - rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, - SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, - CREATE_NOT_DIR, &netfid, &oplock, - NULL, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - - if (rc != 0) { - if (rc == -EIO) - rc = -EINVAL; - goto out; - } - - netpid = current->tgid; - -set_via_filehandle: - rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); - if (!rc) - cifsInode->cifsAttrs = dosattr; - - if (open_file == NULL) - CIFSSMBClose(xid, pTcon, netfid); - else - cifsFileInfo_put(open_file); -out: - if (tlink != NULL) - cifs_put_tlink(tlink); - return rc; + return server->ops->set_file_info(inode, full_path, &info_buf, xid); } /* - * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit + * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit * and rename it to a random name that hopefully won't conflict with * anything else. */ -static int -cifs_rename_pending_delete(char *full_path, struct dentry *dentry, - unsigned int xid) +int +cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, + const unsigned int xid) { int oplock = 0; int rc; @@ -1110,6 +1077,15 @@ undo_setattr: goto out_close; } +/* copied from fs/nfs/dir.c with small changes */ +static void +cifs_drop_nlink(struct inode *inode) +{ + spin_lock(&inode->i_lock); + if (inode->i_nlink > 0) + drop_nlink(inode); + spin_unlock(&inode->i_lock); +} /* * If dentry->d_inode is null (usually meaning the cached dentry @@ -1129,6 +1105,7 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry) struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct tcon_link *tlink; struct cifs_tcon *tcon; + struct TCP_Server_Info *server; struct iattr *attrs = NULL; __u32 dosattr = 0, origattr = 0; @@ -1138,6 +1115,7 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry) if (IS_ERR(tlink)) return PTR_ERR(tlink); tcon = tlink_tcon(tlink); + server = tcon->ses->server; xid = get_xid(); @@ -1160,19 +1138,28 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry) } retry_std_delete: - rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + if (!server->ops->unlink) { + rc = -ENOSYS; + goto psx_del_no_retry; + } + + rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); psx_del_no_retry: if (!rc) { if (inode) - drop_nlink(inode); + cifs_drop_nlink(inode); } else if (rc == -ENOENT) { d_drop(dentry); } else if (rc == -ETXTBSY) { - rc = cifs_rename_pending_delete(full_path, dentry, xid); - if (rc == 0) - drop_nlink(inode); + if (server->ops->rename_pending_delete) { + rc = server->ops->rename_pending_delete(full_path, + dentry, xid); + if (rc == 0) + cifs_drop_nlink(inode); + } + if (rc == -ETXTBSY) + rc = -EBUSY; } else if ((rc == -EACCES) && (dosattr == 0) && inode) { attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); if (attrs == NULL) { @@ -1220,33 +1207,33 @@ unlink_out: } static int -cifs_mkdir_qinfo(struct inode *inode, struct dentry *dentry, umode_t mode, +cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode, const char *full_path, struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, const unsigned int xid) { int rc = 0; - struct inode *newinode = NULL; + struct inode *inode = NULL; if (tcon->unix_ext) - rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb, + rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb, xid); else - rc = cifs_get_inode_info(&newinode, full_path, NULL, - inode->i_sb, xid, NULL); + rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb, + xid, NULL); + if (rc) return rc; - d_instantiate(dentry, newinode); /* * setting nlink not necessary except in cases where we failed to get it - * from the server or was set bogus + * from the server or was set bogus. Also, since this is a brand new + * inode, no need to grab the i_lock before setting the i_nlink. */ - if ((dentry->d_inode) && (dentry->d_inode->i_nlink < 2)) - set_nlink(dentry->d_inode, 2); - + if (inode->i_nlink < 2) + set_nlink(inode, 2); mode &= ~current_umask(); /* must turn on setgid bit if parent dir has it */ - if (inode->i_mode & S_ISGID) + if (parent->i_mode & S_ISGID) mode |= S_ISGID; if (tcon->unix_ext) { @@ -1259,8 +1246,8 @@ cifs_mkdir_qinfo(struct inode *inode, struct dentry *dentry, umode_t mode, }; if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { args.uid = (__u64)current_fsuid(); - if (inode->i_mode & S_ISGID) - args.gid = (__u64)inode->i_gid; + if (parent->i_mode & S_ISGID) + args.gid = (__u64)parent->i_gid; else args.gid = (__u64)current_fsgid(); } else { @@ -1275,22 +1262,20 @@ cifs_mkdir_qinfo(struct inode *inode, struct dentry *dentry, umode_t mode, struct TCP_Server_Info *server = tcon->ses->server; if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) - server->ops->mkdir_setinfo(newinode, full_path, cifs_sb, + server->ops->mkdir_setinfo(inode, full_path, cifs_sb, tcon, xid); - if (dentry->d_inode) { - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) - dentry->d_inode->i_mode = (mode | S_IFDIR); - - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { - dentry->d_inode->i_uid = current_fsuid(); - if (inode->i_mode & S_ISGID) - dentry->d_inode->i_gid = inode->i_gid; - else - dentry->d_inode->i_gid = - current_fsgid(); - } + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) + inode->i_mode = (mode | S_IFDIR); + + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { + inode->i_uid = current_fsuid(); + if (inode->i_mode & S_ISGID) + inode->i_gid = parent->i_gid; + else + inode->i_gid = current_fsgid(); } } + d_instantiate(dentry, inode); return rc; } @@ -1487,29 +1472,32 @@ rmdir_exit: } static int -cifs_do_rename(unsigned int xid, struct dentry *from_dentry, - const char *fromPath, struct dentry *to_dentry, - const char *toPath) +cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, + const char *from_path, struct dentry *to_dentry, + const char *to_path) { struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); struct tcon_link *tlink; - struct cifs_tcon *pTcon; + struct cifs_tcon *tcon; + struct TCP_Server_Info *server; __u16 srcfid; int oplock, rc; tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) return PTR_ERR(tlink); - pTcon = tlink_tcon(tlink); + tcon = tlink_tcon(tlink); + server = tcon->ses->server; + + if (!server->ops->rename) + return -ENOSYS; /* try path-based rename first */ - rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); + rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb); /* - * don't bother with rename by filehandle unless file is busy and - * source Note that cross directory moves do not work with + * Don't bother with rename by filehandle unless file is busy and + * source. Note that cross directory moves do not work with * rename by filehandle to various Windows servers. */ if (rc == 0 || rc != -ETXTBSY) @@ -1520,29 +1508,28 @@ cifs_do_rename(unsigned int xid, struct dentry *from_dentry, goto do_rename_exit; /* open the file to be renamed -- we need DELETE perms */ - rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, + rc = CIFSSMBOpen(xid, tcon, from_path, FILE_OPEN, DELETE, CREATE_NOT_DIR, &srcfid, &oplock, NULL, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - if (rc == 0) { - rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, + rc = CIFSSMBRenameOpenFile(xid, tcon, srcfid, (const char *) to_dentry->d_name.name, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - - CIFSSMBClose(xid, pTcon, srcfid); + CIFSSMBClose(xid, tcon, srcfid); } do_rename_exit: cifs_put_tlink(tlink); return rc; } -int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, - struct inode *target_dir, struct dentry *target_dentry) +int +cifs_rename(struct inode *source_dir, struct dentry *source_dentry, + struct inode *target_dir, struct dentry *target_dentry) { - char *fromName = NULL; - char *toName = NULL; + char *from_name = NULL; + char *to_name = NULL; struct cifs_sb_info *cifs_sb; struct tcon_link *tlink; struct cifs_tcon *tcon; @@ -1563,25 +1550,25 @@ int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, * we already have the rename sem so we do not need to * grab it again here to protect the path integrity */ - fromName = build_path_from_dentry(source_dentry); - if (fromName == NULL) { + from_name = build_path_from_dentry(source_dentry); + if (from_name == NULL) { rc = -ENOMEM; goto cifs_rename_exit; } - toName = build_path_from_dentry(target_dentry); - if (toName == NULL) { + to_name = build_path_from_dentry(target_dentry); + if (to_name == NULL) { rc = -ENOMEM; goto cifs_rename_exit; } - rc = cifs_do_rename(xid, source_dentry, fromName, - target_dentry, toName); + rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, + to_name); if (rc == -EEXIST && tcon->unix_ext) { /* - * Are src and dst hardlinks of same inode? We can - * only tell with unix extensions enabled + * Are src and dst hardlinks of same inode? We can only tell + * with unix extensions enabled. */ info_buf_source = kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), @@ -1592,19 +1579,19 @@ int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, } info_buf_target = info_buf_source + 1; - tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName, - info_buf_source, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); + tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name, + info_buf_source, + cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR); if (tmprc != 0) goto unlink_target; - tmprc = CIFSSMBUnixQPathInfo(xid, tcon, toName, - info_buf_target, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); + tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name, + info_buf_target, + cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR); if (tmprc == 0 && (info_buf_source->UniqueId == info_buf_target->UniqueId)) { @@ -1612,8 +1599,11 @@ int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, rc = 0; goto cifs_rename_exit; } - } /* else ... BB we could add the same check for Windows by - checking the UniqueId via FILE_INTERNAL_INFO */ + } + /* + * else ... BB we could add the same check for Windows by + * checking the UniqueId via FILE_INTERNAL_INFO + */ unlink_target: /* Try unlinking the target dentry if it's not negative */ @@ -1621,15 +1611,14 @@ unlink_target: tmprc = cifs_unlink(target_dir, target_dentry); if (tmprc) goto cifs_rename_exit; - - rc = cifs_do_rename(xid, source_dentry, fromName, - target_dentry, toName); + rc = cifs_do_rename(xid, source_dentry, from_name, + target_dentry, to_name); } cifs_rename_exit: kfree(info_buf_source); - kfree(fromName); - kfree(toName); + kfree(from_name); + kfree(to_name); free_xid(xid); cifs_put_tlink(tlink); return rc; @@ -1854,7 +1843,8 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs, struct cifsInodeInfo *cifsInode = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct tcon_link *tlink = NULL; - struct cifs_tcon *pTcon = NULL; + struct cifs_tcon *tcon = NULL; + struct TCP_Server_Info *server; struct cifs_io_parms io_parms; /* @@ -1868,19 +1858,21 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs, */ open_file = find_writable_file(cifsInode, true); if (open_file) { - __u16 nfid = open_file->netfid; - __u32 npid = open_file->pid; - pTcon = tlink_tcon(open_file->tlink); - rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, - npid, false); + tcon = tlink_tcon(open_file->tlink); + server = tcon->ses->server; + if (server->ops->set_file_size) + rc = server->ops->set_file_size(xid, tcon, open_file, + attrs->ia_size, false); + else + rc = -ENOSYS; cifsFileInfo_put(open_file); cFYI(1, "SetFSize for attrs rc = %d", rc); if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { unsigned int bytes_written; - io_parms.netfid = nfid; - io_parms.pid = npid; - io_parms.tcon = pTcon; + io_parms.netfid = open_file->fid.netfid; + io_parms.pid = open_file->pid; + io_parms.tcon = tcon; io_parms.offset = 0; io_parms.length = attrs->ia_size; rc = CIFSSMBWrite(xid, &io_parms, &bytes_written, @@ -1890,52 +1882,55 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs, } else rc = -EINVAL; - if (rc != 0) { - if (pTcon == NULL) { - tlink = cifs_sb_tlink(cifs_sb); - if (IS_ERR(tlink)) - return PTR_ERR(tlink); - pTcon = tlink_tcon(tlink); - } + if (!rc) + goto set_size_out; - /* Set file size by pathname rather than by handle - either because no valid, writeable file handle for - it was found or because there was an error setting - it by handle */ - rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, - false, cifs_sb->local_nls, + if (tcon == NULL) { + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + tcon = tlink_tcon(tlink); + server = tcon->ses->server; + } + + /* + * Set file size by pathname rather than by handle either because no + * valid, writeable file handle for it was found or because there was + * an error setting it by handle. + */ + if (server->ops->set_path_size) + rc = server->ops->set_path_size(xid, tcon, full_path, + attrs->ia_size, cifs_sb, false); + else + rc = -ENOSYS; + cFYI(1, "SetEOF by path (setattrs) rc = %d", rc); + if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { + __u16 netfid; + int oplock = 0; + + rc = SMBLegacyOpen(xid, tcon, full_path, FILE_OPEN, + GENERIC_WRITE, CREATE_NOT_DIR, &netfid, + &oplock, NULL, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - cFYI(1, "SetEOF by path (setattrs) rc = %d", rc); - if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { - __u16 netfid; - int oplock = 0; - - rc = SMBLegacyOpen(xid, pTcon, full_path, - FILE_OPEN, GENERIC_WRITE, - CREATE_NOT_DIR, &netfid, &oplock, NULL, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - if (rc == 0) { - unsigned int bytes_written; - - io_parms.netfid = netfid; - io_parms.pid = current->tgid; - io_parms.tcon = pTcon; - io_parms.offset = 0; - io_parms.length = attrs->ia_size; - rc = CIFSSMBWrite(xid, &io_parms, - &bytes_written, - NULL, NULL, 1); - cFYI(1, "wrt seteof rc %d", rc); - CIFSSMBClose(xid, pTcon, netfid); - } + CIFS_MOUNT_MAP_SPECIAL_CHR); + if (rc == 0) { + unsigned int bytes_written; + + io_parms.netfid = netfid; + io_parms.pid = current->tgid; + io_parms.tcon = tcon; + io_parms.offset = 0; + io_parms.length = attrs->ia_size; + rc = CIFSSMBWrite(xid, &io_parms, &bytes_written, NULL, + NULL, 1); + cFYI(1, "wrt seteof rc %d", rc); + CIFSSMBClose(xid, tcon, netfid); } - if (tlink) - cifs_put_tlink(tlink); } + if (tlink) + cifs_put_tlink(tlink); +set_size_out: if (rc == 0) { cifsInode->server_eof = attrs->ia_size; cifs_setsize(inode, attrs->ia_size); @@ -2042,7 +2037,7 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) args->device = 0; open_file = find_writable_file(cifsInode, true); if (open_file) { - u16 nfid = open_file->netfid; + u16 nfid = open_file->fid.netfid; u32 npid = open_file->pid; pTcon = tlink_tcon(open_file->tlink); rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c index ae082a6..fd5009d 100644 --- a/fs/cifs/ioctl.c +++ b/fs/cifs/ioctl.c @@ -28,8 +28,6 @@ #include "cifs_debug.h" #include "cifsfs.h" -#define CIFS_IOC_CHECKUMOUNT _IO(0xCF, 2) - long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) { struct inode *inode = filep->f_dentry->d_inode; @@ -51,23 +49,6 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) cifs_sb = CIFS_SB(inode->i_sb); switch (command) { - static bool warned = false; - case CIFS_IOC_CHECKUMOUNT: - if (!warned) { - warned = true; - cERROR(1, "the CIFS_IOC_CHECKMOUNT ioctl will " - "be deprecated in 3.7. Please " - "migrate away from the use of " - "umount.cifs"); - } - cFYI(1, "User unmount attempted"); - if (cifs_sb->mnt_uid == current_uid()) - rc = 0; - else { - rc = -EACCES; - cFYI(1, "uids do not match"); - } - break; #ifdef CONFIG_CIFS_POSIX case FS_IOC_GETFLAGS: if (pSMBFile == NULL) @@ -75,8 +56,9 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) tcon = tlink_tcon(pSMBFile->tlink); caps = le64_to_cpu(tcon->fsUnixInfo.Capability); if (CIFS_UNIX_EXTATTR_CAP & caps) { - rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid, - &ExtAttrBits, &ExtAttrMask); + rc = CIFSGetExtAttr(xid, tcon, + pSMBFile->fid.netfid, + &ExtAttrBits, &ExtAttrMask); if (rc == 0) rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE, @@ -94,8 +76,12 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) rc = -EFAULT; break; } - /* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid, - extAttrBits, &ExtAttrMask);*/ + /* + * rc = CIFSGetExtAttr(xid, tcon, + * pSMBFile->fid.netfid, + * extAttrBits, + * &ExtAttrMask); + */ } cFYI(1, "set flags not implemented yet"); break; diff --git a/fs/cifs/link.c b/fs/cifs/link.c index 09e4b3a..51dc2fb 100644 --- a/fs/cifs/link.c +++ b/fs/cifs/link.c @@ -391,70 +391,86 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode, { int rc = -EACCES; unsigned int xid; - char *fromName = NULL; - char *toName = NULL; + char *from_name = NULL; + char *to_name = NULL; struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct tcon_link *tlink; - struct cifs_tcon *pTcon; + struct cifs_tcon *tcon; + struct TCP_Server_Info *server; struct cifsInodeInfo *cifsInode; tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) return PTR_ERR(tlink); - pTcon = tlink_tcon(tlink); + tcon = tlink_tcon(tlink); xid = get_xid(); - fromName = build_path_from_dentry(old_file); - toName = build_path_from_dentry(direntry); - if ((fromName == NULL) || (toName == NULL)) { + from_name = build_path_from_dentry(old_file); + to_name = build_path_from_dentry(direntry); + if ((from_name == NULL) || (to_name == NULL)) { rc = -ENOMEM; goto cifs_hl_exit; } - if (pTcon->unix_ext) - rc = CIFSUnixCreateHardLink(xid, pTcon, fromName, toName, + if (tcon->unix_ext) + rc = CIFSUnixCreateHardLink(xid, tcon, from_name, to_name, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); else { - rc = CIFSCreateHardLink(xid, pTcon, fromName, toName, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); + server = tcon->ses->server; + if (!server->ops->create_hardlink) + return -ENOSYS; + rc = server->ops->create_hardlink(xid, tcon, from_name, to_name, + cifs_sb); if ((rc == -EIO) || (rc == -EINVAL)) rc = -EOPNOTSUPP; } d_drop(direntry); /* force new lookup from server of target */ - /* if source file is cached (oplocked) revalidate will not go to server - until the file is closed or oplock broken so update nlinks locally */ + /* + * if source file is cached (oplocked) revalidate will not go to server + * until the file is closed or oplock broken so update nlinks locally + */ if (old_file->d_inode) { cifsInode = CIFS_I(old_file->d_inode); if (rc == 0) { + spin_lock(&old_file->d_inode->i_lock); inc_nlink(old_file->d_inode); -/* BB should we make this contingent on superblock flag NOATIME? */ -/* old_file->d_inode->i_ctime = CURRENT_TIME;*/ - /* parent dir timestamps will update from srv - within a second, would it really be worth it - to set the parent dir cifs inode time to zero - to force revalidate (faster) for it too? */ + spin_unlock(&old_file->d_inode->i_lock); + /* + * BB should we make this contingent on superblock flag + * NOATIME? + */ + /* old_file->d_inode->i_ctime = CURRENT_TIME; */ + /* + * parent dir timestamps will update from srv within a + * second, would it really be worth it to set the parent + * dir cifs inode time to zero to force revalidate + * (faster) for it too? + */ } - /* if not oplocked will force revalidate to get info - on source file from srv */ + /* + * if not oplocked will force revalidate to get info on source + * file from srv + */ cifsInode->time = 0; - /* Will update parent dir timestamps from srv within a second. - Would it really be worth it to set the parent dir (cifs - inode) time field to zero to force revalidate on parent - directory faster ie - CIFS_I(inode)->time = 0; */ + /* + * Will update parent dir timestamps from srv within a second. + * Would it really be worth it to set the parent dir (cifs + * inode) time field to zero to force revalidate on parent + * directory faster ie + * + * CIFS_I(inode)->time = 0; + */ } cifs_hl_exit: - kfree(fromName); - kfree(toName); + kfree(from_name); + kfree(to_name); free_xid(xid); cifs_put_tlink(tlink); return rc; diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index ce41fee..3a00c0d 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -466,7 +466,7 @@ is_valid_oplock_break(char *buffer, struct TCP_Server_Info *srv) list_for_each(tmp2, &tcon->openFileList) { netfile = list_entry(tmp2, struct cifsFileInfo, tlist); - if (pSMB->Fid != netfile->netfid) + if (pSMB->Fid != netfile->fid.netfid) continue; cFYI(1, "file id match, oplock break"); @@ -579,3 +579,33 @@ backup_cred(struct cifs_sb_info *cifs_sb) return false; } + +void +cifs_del_pending_open(struct cifs_pending_open *open) +{ + spin_lock(&cifs_file_list_lock); + list_del(&open->olist); + spin_unlock(&cifs_file_list_lock); +} + +void +cifs_add_pending_open_locked(struct cifs_fid *fid, struct tcon_link *tlink, + struct cifs_pending_open *open) +{ +#ifdef CONFIG_CIFS_SMB2 + memcpy(open->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); +#endif + open->oplock = CIFS_OPLOCK_NO_CHANGE; + open->tlink = tlink; + fid->pending_open = open; + list_add_tail(&open->olist, &tlink_tcon(tlink)->pending_opens); +} + +void +cifs_add_pending_open(struct cifs_fid *fid, struct tcon_link *tlink, + struct cifs_pending_open *open) +{ + spin_lock(&cifs_file_list_lock); + cifs_add_pending_open_locked(fid, tlink, open); + spin_unlock(&cifs_file_list_lock); +} diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c index 581c225..d5ce9e2 100644 --- a/fs/cifs/netmisc.c +++ b/fs/cifs/netmisc.c @@ -110,7 +110,7 @@ static const struct smb_to_posix_error mapping_table_ERRSRV[] = { {ERRnoroom, -ENOSPC}, {ERRrmuns, -EUSERS}, {ERRtimeout, -ETIME}, - {ERRnoresource, -ENOBUFS}, + {ERRnoresource, -EREMOTEIO}, {ERRtoomanyuids, -EUSERS}, {ERRbaduid, -EACCES}, {ERRusempx, -EIO}, @@ -412,7 +412,7 @@ static const struct { from NT_STATUS_INSUFFICIENT_RESOURCES to NT_STATUS_INSUFF_SERVER_RESOURCES during the session setup } */ { - ERRDOS, ERRnomem, NT_STATUS_INSUFFICIENT_RESOURCES}, { + ERRDOS, ERRnoresource, NT_STATUS_INSUFFICIENT_RESOURCES}, { ERRDOS, ERRbadpath, NT_STATUS_DFS_EXIT_PATH_FOUND}, { ERRDOS, 23, NT_STATUS_DEVICE_DATA_ERROR}, { ERRHRD, ERRgeneral, NT_STATUS_DEVICE_NOT_CONNECTED}, { @@ -682,7 +682,7 @@ static const struct { ERRHRD, ERRgeneral, NT_STATUS_NO_USER_SESSION_KEY}, { ERRDOS, 59, NT_STATUS_USER_SESSION_DELETED}, { ERRHRD, ERRgeneral, NT_STATUS_RESOURCE_LANG_NOT_FOUND}, { - ERRDOS, ERRnomem, NT_STATUS_INSUFF_SERVER_RESOURCES}, { + ERRDOS, ERRnoresource, NT_STATUS_INSUFF_SERVER_RESOURCES}, { ERRHRD, ERRgeneral, NT_STATUS_INVALID_BUFFER_SIZE}, { ERRHRD, ERRgeneral, NT_STATUS_INVALID_ADDRESS_COMPONENT}, { ERRHRD, ERRgeneral, NT_STATUS_INVALID_ADDRESS_WILDCARD}, { @@ -913,8 +913,9 @@ map_smb_to_linux_error(char *buf, bool logErr) * portion, the number of word parameters and the data portion of the message */ unsigned int -smbCalcSize(struct smb_hdr *ptr) +smbCalcSize(void *buf) { + struct smb_hdr *ptr = (struct smb_hdr *)buf; return (sizeof(struct smb_hdr) + (2 * ptr->WordCount) + 2 /* size of the bcc field */ + get_bcc(ptr)); } diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index d87f826..f9b5d3d 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -151,7 +151,7 @@ cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) } } -static void +void cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info, struct cifs_sb_info *cifs_sb) { @@ -220,7 +220,8 @@ int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb, } */ -static int initiate_cifs_search(const unsigned int xid, struct file *file) +static int +initiate_cifs_search(const unsigned int xid, struct file *file) { __u16 search_flags; int rc = 0; @@ -229,6 +230,7 @@ static int initiate_cifs_search(const unsigned int xid, struct file *file) struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); struct tcon_link *tlink = NULL; struct cifs_tcon *tcon; + struct TCP_Server_Info *server; if (file->private_data == NULL) { tlink = cifs_sb_tlink(cifs_sb); @@ -248,6 +250,13 @@ static int initiate_cifs_search(const unsigned int xid, struct file *file) tcon = tlink_tcon(cifsFile->tlink); } + server = tcon->ses->server; + + if (!server->ops->query_dir_first) { + rc = -ENOSYS; + goto error_exit; + } + cifsFile->invalidHandle = true; cifsFile->srch_inf.endOfSearch = false; @@ -278,10 +287,10 @@ ffirst_retry: if (backup_cred(cifs_sb)) search_flags |= CIFS_SEARCH_BACKUP_SEARCH; - rc = CIFSFindFirst(xid, tcon, full_path, cifs_sb->local_nls, - &cifsFile->netfid, search_flags, &cifsFile->srch_inf, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); + rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb, + &cifsFile->fid, search_flags, + &cifsFile->srch_inf); + if (rc == 0) cifsFile->invalidHandle = false; /* BB add following call to handle readdir on new NTFS symlink errors @@ -501,62 +510,67 @@ static int cifs_save_resume_key(const char *current_entry, return rc; } -/* find the corresponding entry in the search */ -/* Note that the SMB server returns search entries for . and .. which - complicates logic here if we choose to parse for them and we do not - assume that they are located in the findfirst return buffer.*/ -/* We start counting in the buffer with entry 2 and increment for every - entry (do not increment for . or .. entry) */ -static int find_cifs_entry(const unsigned int xid, struct cifs_tcon *pTcon, - struct file *file, char **ppCurrentEntry, int *num_to_ret) +/* + * Find the corresponding entry in the search. Note that the SMB server returns + * search entries for . and .. which complicates logic here if we choose to + * parse for them and we do not assume that they are located in the findfirst + * return buffer. We start counting in the buffer with entry 2 and increment for + * every entry (do not increment for . or .. entry). + */ +static int +find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, + struct file *file, char **current_entry, int *num_to_ret) { __u16 search_flags; int rc = 0; int pos_in_buf = 0; loff_t first_entry_in_buffer; loff_t index_to_find = file->f_pos; - struct cifsFileInfo *cifsFile = file->private_data; + struct cifsFileInfo *cfile = file->private_data; struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); + struct TCP_Server_Info *server = tcon->ses->server; /* check if index in the buffer */ - if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || - (num_to_ret == NULL)) + if (!server->ops->query_dir_first || !server->ops->query_dir_next) + return -ENOSYS; + + if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL)) return -ENOENT; - *ppCurrentEntry = NULL; - first_entry_in_buffer = - cifsFile->srch_inf.index_of_last_entry - - cifsFile->srch_inf.entries_in_buffer; + *current_entry = NULL; + first_entry_in_buffer = cfile->srch_inf.index_of_last_entry - + cfile->srch_inf.entries_in_buffer; - /* if first entry in buf is zero then is first buffer - in search response data which means it is likely . and .. - will be in this buffer, although some servers do not return - . and .. for the root of a drive and for those we need - to start two entries earlier */ + /* + * If first entry in buf is zero then is first buffer + * in search response data which means it is likely . and .. + * will be in this buffer, although some servers do not return + * . and .. for the root of a drive and for those we need + * to start two entries earlier. + */ dump_cifs_file_struct(file, "In fce "); - if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && - is_dir_changed(file)) || - (index_to_find < first_entry_in_buffer)) { + if (((index_to_find < cfile->srch_inf.index_of_last_entry) && + is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) { /* close and restart search */ cFYI(1, "search backing up - close and restart search"); spin_lock(&cifs_file_list_lock); - if (!cifsFile->srch_inf.endOfSearch && - !cifsFile->invalidHandle) { - cifsFile->invalidHandle = true; + if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) { + cfile->invalidHandle = true; spin_unlock(&cifs_file_list_lock); - CIFSFindClose(xid, pTcon, cifsFile->netfid); + if (server->ops->close) + server->ops->close(xid, tcon, &cfile->fid); } else spin_unlock(&cifs_file_list_lock); - if (cifsFile->srch_inf.ntwrk_buf_start) { + if (cfile->srch_inf.ntwrk_buf_start) { cFYI(1, "freeing SMB ff cache buf on search rewind"); - if (cifsFile->srch_inf.smallBuf) - cifs_small_buf_release(cifsFile->srch_inf. + if (cfile->srch_inf.smallBuf) + cifs_small_buf_release(cfile->srch_inf. ntwrk_buf_start); else - cifs_buf_release(cifsFile->srch_inf. + cifs_buf_release(cfile->srch_inf. ntwrk_buf_start); - cifsFile->srch_inf.ntwrk_buf_start = NULL; + cfile->srch_inf.ntwrk_buf_start = NULL; } rc = initiate_cifs_search(xid, file); if (rc) { @@ -565,65 +579,64 @@ static int find_cifs_entry(const unsigned int xid, struct cifs_tcon *pTcon, return rc; } /* FindFirst/Next set last_entry to NULL on malformed reply */ - if (cifsFile->srch_inf.last_entry) - cifs_save_resume_key(cifsFile->srch_inf.last_entry, - cifsFile); + if (cfile->srch_inf.last_entry) + cifs_save_resume_key(cfile->srch_inf.last_entry, cfile); } search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME; if (backup_cred(cifs_sb)) search_flags |= CIFS_SEARCH_BACKUP_SEARCH; - while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && - (rc == 0) && !cifsFile->srch_inf.endOfSearch) { + while ((index_to_find >= cfile->srch_inf.index_of_last_entry) && + (rc == 0) && !cfile->srch_inf.endOfSearch) { cFYI(1, "calling findnext2"); - rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, search_flags, - &cifsFile->srch_inf); + rc = server->ops->query_dir_next(xid, tcon, &cfile->fid, + search_flags, + &cfile->srch_inf); /* FindFirst/Next set last_entry to NULL on malformed reply */ - if (cifsFile->srch_inf.last_entry) - cifs_save_resume_key(cifsFile->srch_inf.last_entry, - cifsFile); + if (cfile->srch_inf.last_entry) + cifs_save_resume_key(cfile->srch_inf.last_entry, cfile); if (rc) return -ENOENT; } - if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { + if (index_to_find < cfile->srch_inf.index_of_last_entry) { /* we found the buffer that contains the entry */ /* scan and find it */ int i; - char *current_entry; - char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + - smbCalcSize((struct smb_hdr *) - cifsFile->srch_inf.ntwrk_buf_start); - - current_entry = cifsFile->srch_inf.srch_entries_start; - first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry - - cifsFile->srch_inf.entries_in_buffer; + char *cur_ent; + char *end_of_smb = cfile->srch_inf.ntwrk_buf_start + + server->ops->calc_smb_size( + cfile->srch_inf.ntwrk_buf_start); + + cur_ent = cfile->srch_inf.srch_entries_start; + first_entry_in_buffer = cfile->srch_inf.index_of_last_entry + - cfile->srch_inf.entries_in_buffer; pos_in_buf = index_to_find - first_entry_in_buffer; cFYI(1, "found entry - pos_in_buf %d", pos_in_buf); - for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) { + for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) { /* go entry by entry figuring out which is first */ - current_entry = nxt_dir_entry(current_entry, end_of_smb, - cifsFile->srch_inf.info_level); + cur_ent = nxt_dir_entry(cur_ent, end_of_smb, + cfile->srch_inf.info_level); } - if ((current_entry == NULL) && (i < pos_in_buf)) { + if ((cur_ent == NULL) && (i < pos_in_buf)) { /* BB fixme - check if we should flag this error */ cERROR(1, "reached end of buf searching for pos in buf" - " %d index to find %lld rc %d", - pos_in_buf, index_to_find, rc); + " %d index to find %lld rc %d", pos_in_buf, + index_to_find, rc); } rc = 0; - *ppCurrentEntry = current_entry; + *current_entry = cur_ent; } else { cFYI(1, "index not in buffer - could not findnext into it"); return 0; } - if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { + if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) { cFYI(1, "can not return entries pos_in_buf beyond last"); *num_to_ret = 0; } else - *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; + *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf; return rc; } @@ -723,7 +736,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) int rc = 0; unsigned int xid; int i; - struct cifs_tcon *pTcon; + struct cifs_tcon *tcon; struct cifsFileInfo *cifsFile = NULL; char *current_entry; int num_to_fill = 0; @@ -781,12 +794,12 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) } } /* else { cifsFile->invalidHandle = true; - CIFSFindClose(xid, pTcon, cifsFile->netfid); + tcon->ses->server->close(xid, tcon, &cifsFile->fid); } */ - pTcon = tlink_tcon(cifsFile->tlink); - rc = find_cifs_entry(xid, pTcon, file, - ¤t_entry, &num_to_fill); + tcon = tlink_tcon(cifsFile->tlink); + rc = find_cifs_entry(xid, tcon, file, ¤t_entry, + &num_to_fill); if (rc) { cFYI(1, "fce error %d", rc); goto rddir2_exit; @@ -798,7 +811,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) } cFYI(1, "loop through %d times filling dir for net buf %p", num_to_fill, cifsFile->srch_inf.ntwrk_buf_start); - max_len = smbCalcSize((struct smb_hdr *) + max_len = tcon->ses->server->ops->calc_smb_size( cifsFile->srch_inf.ntwrk_buf_start); end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; @@ -815,10 +828,12 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) num_to_fill, i); break; } - /* if buggy server returns . and .. late do - we want to check for that here? */ - rc = cifs_filldir(current_entry, file, - filldir, direntry, tmp_buf, max_len); + /* + * if buggy server returns . and .. late do we want to + * check for that here? + */ + rc = cifs_filldir(current_entry, file, filldir, + direntry, tmp_buf, max_len); if (rc == -EOVERFLOW) { rc = 0; break; diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index 382c06d..76809f4 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -876,7 +876,8 @@ ssetup_ntlmssp_authenticate: pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base; smb_buf = (struct smb_hdr *)iov[0].iov_base; - if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError == + if ((type == RawNTLMSSP) && (resp_buf_type != CIFS_NO_BUFFER) && + (smb_buf->Status.CifsError == cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) { if (phase != NtLmNegotiate) { cERROR(1, "Unexpected more processing error"); diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c index 3129ac7..56cc4be 100644 --- a/fs/cifs/smb1ops.c +++ b/fs/cifs/smb1ops.c @@ -17,6 +17,8 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include <linux/pagemap.h> +#include <linux/vfs.h> #include "cifsglob.h" #include "cifsproto.h" #include "cifs_debug.h" @@ -63,7 +65,7 @@ send_nt_cancel(struct TCP_Server_Info *server, void *buf, static bool cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) { - return ob1->netfid == ob2->netfid; + return ob1->fid.netfid == ob2->fid.netfid; } static unsigned int @@ -410,6 +412,83 @@ cifs_negotiate(const unsigned int xid, struct cifs_ses *ses) return rc; } +static unsigned int +cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) +{ + __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); + struct TCP_Server_Info *server = tcon->ses->server; + unsigned int wsize; + + /* start with specified wsize, or default */ + if (volume_info->wsize) + wsize = volume_info->wsize; + else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) + wsize = CIFS_DEFAULT_IOSIZE; + else + wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; + + /* can server support 24-bit write sizes? (via UNIX extensions) */ + if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) + wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); + + /* + * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? + * Limit it to max buffer offered by the server, minus the size of the + * WRITEX header, not including the 4 byte RFC1001 length. + */ + if (!(server->capabilities & CAP_LARGE_WRITE_X) || + (!(server->capabilities & CAP_UNIX) && + (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) + wsize = min_t(unsigned int, wsize, + server->maxBuf - sizeof(WRITE_REQ) + 4); + + /* hard limit of CIFS_MAX_WSIZE */ + wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); + + return wsize; +} + +static unsigned int +cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) +{ + __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); + struct TCP_Server_Info *server = tcon->ses->server; + unsigned int rsize, defsize; + + /* + * Set default value... + * + * HACK alert! Ancient servers have very small buffers. Even though + * MS-CIFS indicates that servers are only limited by the client's + * bufsize for reads, testing against win98se shows that it throws + * INVALID_PARAMETER errors if you try to request too large a read. + * OS/2 just sends back short reads. + * + * If the server doesn't advertise CAP_LARGE_READ_X, then assume that + * it can't handle a read request larger than its MaxBufferSize either. + */ + if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) + defsize = CIFS_DEFAULT_IOSIZE; + else if (server->capabilities & CAP_LARGE_READ_X) + defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; + else + defsize = server->maxBuf - sizeof(READ_RSP); + + rsize = volume_info->rsize ? volume_info->rsize : defsize; + + /* + * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to + * the client's MaxBufferSize. + */ + if (!(server->capabilities & CAP_LARGE_READ_X)) + rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); + + /* hard limit of CIFS_MAX_RSIZE */ + rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); + + return rsize; +} + static void cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) { @@ -489,6 +568,13 @@ cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, CIFS_MOUNT_MAP_SPECIAL_CHR); } +static int +cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *fid, FILE_ALL_INFO *data) +{ + return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data); +} + static char * cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon) @@ -607,6 +693,219 @@ cifs_mkdir_setinfo(struct inode *inode, const char *full_path, cifsInode->cifsAttrs = dosattrs; } +static int +cifs_open_file(const unsigned int xid, struct cifs_tcon *tcon, const char *path, + int disposition, int desired_access, int create_options, + struct cifs_fid *fid, __u32 *oplock, FILE_ALL_INFO *buf, + struct cifs_sb_info *cifs_sb) +{ + if (!(tcon->ses->capabilities & CAP_NT_SMBS)) + return SMBLegacyOpen(xid, tcon, path, disposition, + desired_access, create_options, + &fid->netfid, oplock, buf, + cifs_sb->local_nls, cifs_sb->mnt_cifs_flags + & CIFS_MOUNT_MAP_SPECIAL_CHR); + return CIFSSMBOpen(xid, tcon, path, disposition, desired_access, + create_options, &fid->netfid, oplock, buf, + cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR); +} + +static void +cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) +{ + struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); + cfile->fid.netfid = fid->netfid; + cifs_set_oplock_level(cinode, oplock); + cinode->can_cache_brlcks = cinode->clientCanCacheAll; +} + +static void +cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *fid) +{ + CIFSSMBClose(xid, tcon, fid->netfid); +} + +static int +cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *fid) +{ + return CIFSSMBFlush(xid, tcon, fid->netfid); +} + +static int +cifs_sync_read(const unsigned int xid, struct cifsFileInfo *cfile, + struct cifs_io_parms *parms, unsigned int *bytes_read, + char **buf, int *buf_type) +{ + parms->netfid = cfile->fid.netfid; + return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type); +} + +static int +cifs_sync_write(const unsigned int xid, struct cifsFileInfo *cfile, + struct cifs_io_parms *parms, unsigned int *written, + struct kvec *iov, unsigned long nr_segs) +{ + + parms->netfid = cfile->fid.netfid; + return CIFSSMBWrite2(xid, parms, written, iov, nr_segs); +} + +static int +smb_set_file_info(struct inode *inode, const char *full_path, + FILE_BASIC_INFO *buf, const unsigned int xid) +{ + int oplock = 0; + int rc; + __u16 netfid; + __u32 netpid; + struct cifsFileInfo *open_file; + struct cifsInodeInfo *cinode = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct tcon_link *tlink = NULL; + struct cifs_tcon *tcon; + FILE_BASIC_INFO info_buf; + + /* if the file is already open for write, just use that fileid */ + open_file = find_writable_file(cinode, true); + if (open_file) { + netfid = open_file->fid.netfid; + netpid = open_file->pid; + tcon = tlink_tcon(open_file->tlink); + goto set_via_filehandle; + } + + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + rc = PTR_ERR(tlink); + tlink = NULL; + goto out; + } + tcon = tlink_tcon(tlink); + + /* + * NT4 apparently returns success on this call, but it doesn't really + * work. + */ + if (!(tcon->ses->flags & CIFS_SES_NT4)) { + rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, + cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR); + if (rc == 0) { + cinode->cifsAttrs = le32_to_cpu(buf->Attributes); + goto out; + } else if (rc != -EOPNOTSUPP && rc != -EINVAL) + goto out; + } + + cFYI(1, "calling SetFileInfo since SetPathInfo for times not supported " + "by this server"); + rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, + SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, + &netfid, &oplock, NULL, cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + + if (rc != 0) { + if (rc == -EIO) + rc = -EINVAL; + goto out; + } + + netpid = current->tgid; + +set_via_filehandle: + rc = CIFSSMBSetFileInfo(xid, tcon, &info_buf, netfid, netpid); + if (!rc) + cinode->cifsAttrs = le32_to_cpu(buf->Attributes); + + if (open_file == NULL) + CIFSSMBClose(xid, tcon, netfid); + else + cifsFileInfo_put(open_file); +out: + if (tlink != NULL) + cifs_put_tlink(tlink); + return rc; +} + +static int +cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, + const char *path, struct cifs_sb_info *cifs_sb, + struct cifs_fid *fid, __u16 search_flags, + struct cifs_search_info *srch_inf) +{ + return CIFSFindFirst(xid, tcon, path, cifs_sb, + &fid->netfid, search_flags, srch_inf, true); +} + +static int +cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *fid, __u16 search_flags, + struct cifs_search_info *srch_inf) +{ + return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf); +} + +static int +cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *fid) +{ + return CIFSFindClose(xid, tcon, fid->netfid); +} + +static int +cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid, + struct cifsInodeInfo *cinode) +{ + return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0, + LOCKING_ANDX_OPLOCK_RELEASE, false, + cinode->clientCanCacheRead ? 1 : 0); +} + +static int +cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon, + struct kstatfs *buf) +{ + int rc = -EOPNOTSUPP; + + buf->f_type = CIFS_MAGIC_NUMBER; + + /* + * We could add a second check for a QFS Unix capability bit + */ + if ((tcon->ses->capabilities & CAP_UNIX) && + (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) + rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); + + /* + * Only need to call the old QFSInfo if failed on newer one, + * e.g. by OS/2. + **/ + if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) + rc = CIFSSMBQFSInfo(xid, tcon, buf); + + /* + * Some old Windows servers also do not support level 103, retry with + * older level one if old server failed the previous call or we + * bypassed it because we detected that this was an older LANMAN sess + */ + if (rc) + rc = SMBOldQFSInfo(xid, tcon, buf); + return rc; +} + +static int +cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, + __u64 length, __u32 type, int lock, int unlock, bool wait) +{ + return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid, + current->tgid, length, offset, unlock, lock, + (__u8)type, wait, 0); +} + struct smb_version_operations smb1_operations = { .send_cancel = send_nt_cancel, .compare_fids = cifs_compare_fids, @@ -630,6 +929,8 @@ struct smb_version_operations smb1_operations = { .check_trans2 = cifs_check_trans2, .need_neg = cifs_need_neg, .negotiate = cifs_negotiate, + .negotiate_wsize = cifs_negotiate_wsize, + .negotiate_rsize = cifs_negotiate_rsize, .sess_setup = CIFS_SessSetup, .logoff = CIFSSMBLogoff, .tree_connect = CIFSTCon, @@ -638,12 +939,37 @@ struct smb_version_operations smb1_operations = { .qfs_tcon = cifs_qfs_tcon, .is_path_accessible = cifs_is_path_accessible, .query_path_info = cifs_query_path_info, + .query_file_info = cifs_query_file_info, .get_srv_inum = cifs_get_srv_inum, + .set_path_size = CIFSSMBSetEOF, + .set_file_size = CIFSSMBSetFileSize, + .set_file_info = smb_set_file_info, .build_path_to_root = cifs_build_path_to_root, .echo = CIFSSMBEcho, .mkdir = CIFSSMBMkDir, .mkdir_setinfo = cifs_mkdir_setinfo, .rmdir = CIFSSMBRmDir, + .unlink = CIFSSMBDelFile, + .rename_pending_delete = cifs_rename_pending_delete, + .rename = CIFSSMBRename, + .create_hardlink = CIFSCreateHardLink, + .open = cifs_open_file, + .set_fid = cifs_set_fid, + .close = cifs_close_file, + .flush = cifs_flush_file, + .async_readv = cifs_async_readv, + .async_writev = cifs_async_writev, + .sync_read = cifs_sync_read, + .sync_write = cifs_sync_write, + .query_dir_first = cifs_query_dir_first, + .query_dir_next = cifs_query_dir_next, + .close_dir = cifs_close_dir, + .calc_smb_size = smbCalcSize, + .oplock_response = cifs_oplock_response, + .queryfs = cifs_queryfs, + .mand_lock = cifs_mand_lock, + .mand_unlock_range = cifs_unlock_range, + .push_mand_locks = cifs_push_mandatory_locks, }; struct smb_version_values smb1_values = { diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c new file mode 100644 index 0000000..a93eec3 --- /dev/null +++ b/fs/cifs/smb2file.c @@ -0,0 +1,302 @@ +/* + * fs/cifs/smb2file.c + * + * Copyright (C) International Business Machines Corp., 2002, 2011 + * Author(s): Steve French (sfrench@us.ibm.com), + * Pavel Shilovsky ((pshilovsky@samba.org) 2012 + * + * This library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published + * by the Free Software Foundation; either version 2.1 of the License, or + * (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <linux/fs.h> +#include <linux/stat.h> +#include <linux/slab.h> +#include <linux/pagemap.h> +#include <asm/div64.h> +#include "cifsfs.h" +#include "cifspdu.h" +#include "cifsglob.h" +#include "cifsproto.h" +#include "cifs_debug.h" +#include "cifs_fs_sb.h" +#include "cifs_unicode.h" +#include "fscache.h" +#include "smb2proto.h" + +void +smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock) +{ + oplock &= 0xFF; + if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) + return; + if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { + cinode->clientCanCacheAll = true; + cinode->clientCanCacheRead = true; + cFYI(1, "Exclusive Oplock granted on inode %p", + &cinode->vfs_inode); + } else if (oplock == SMB2_OPLOCK_LEVEL_II) { + cinode->clientCanCacheAll = false; + cinode->clientCanCacheRead = true; + cFYI(1, "Level II Oplock granted on inode %p", + &cinode->vfs_inode); + } else { + cinode->clientCanCacheAll = false; + cinode->clientCanCacheRead = false; + } +} + +int +smb2_open_file(const unsigned int xid, struct cifs_tcon *tcon, const char *path, + int disposition, int desired_access, int create_options, + struct cifs_fid *fid, __u32 *oplock, FILE_ALL_INFO *buf, + struct cifs_sb_info *cifs_sb) +{ + int rc; + __le16 *smb2_path; + struct smb2_file_all_info *smb2_data = NULL; + __u8 smb2_oplock[17]; + + smb2_path = cifs_convert_path_to_utf16(path, cifs_sb); + if (smb2_path == NULL) { + rc = -ENOMEM; + goto out; + } + + smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2, + GFP_KERNEL); + if (smb2_data == NULL) { + rc = -ENOMEM; + goto out; + } + + desired_access |= FILE_READ_ATTRIBUTES; + *smb2_oplock = SMB2_OPLOCK_LEVEL_EXCLUSIVE; + + if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) + memcpy(smb2_oplock + 1, fid->lease_key, SMB2_LEASE_KEY_SIZE); + + rc = SMB2_open(xid, tcon, smb2_path, &fid->persistent_fid, + &fid->volatile_fid, desired_access, disposition, + 0, 0, smb2_oplock, smb2_data); + if (rc) + goto out; + + if (buf) { + /* open response does not have IndexNumber field - get it */ + rc = SMB2_get_srv_num(xid, tcon, fid->persistent_fid, + fid->volatile_fid, + &smb2_data->IndexNumber); + if (rc) { + /* let get_inode_info disable server inode numbers */ + smb2_data->IndexNumber = 0; + rc = 0; + } + move_smb2_info_to_cifs(buf, smb2_data); + } + + *oplock = *smb2_oplock; +out: + kfree(smb2_data); + kfree(smb2_path); + return rc; +} + +int +smb2_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, + const unsigned int xid) +{ + int rc = 0, stored_rc; + unsigned int max_num, num = 0, max_buf; + struct smb2_lock_element *buf, *cur; + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); + struct cifsLockInfo *li, *tmp; + __u64 length = 1 + flock->fl_end - flock->fl_start; + struct list_head tmp_llist; + + INIT_LIST_HEAD(&tmp_llist); + + /* + * Accessing maxBuf is racy with cifs_reconnect - need to store value + * and check it for zero before using. + */ + max_buf = tcon->ses->server->maxBuf; + if (!max_buf) + return -EINVAL; + + max_num = max_buf / sizeof(struct smb2_lock_element); + buf = kzalloc(max_num * sizeof(struct smb2_lock_element), GFP_KERNEL); + if (!buf) + return -ENOMEM; + + cur = buf; + + down_write(&cinode->lock_sem); + list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) { + if (flock->fl_start > li->offset || + (flock->fl_start + length) < + (li->offset + li->length)) + continue; + if (current->tgid != li->pid) + continue; + if (cinode->can_cache_brlcks) { + /* + * We can cache brlock requests - simply remove a lock + * from the file's list. + */ + list_del(&li->llist); + cifs_del_lock_waiters(li); + kfree(li); + continue; + } + cur->Length = cpu_to_le64(li->length); + cur->Offset = cpu_to_le64(li->offset); + cur->Flags = cpu_to_le32(SMB2_LOCKFLAG_UNLOCK); + /* + * We need to save a lock here to let us add it again to the + * file's list if the unlock range request fails on the server. + */ + list_move(&li->llist, &tmp_llist); + if (++num == max_num) { + stored_rc = smb2_lockv(xid, tcon, + cfile->fid.persistent_fid, + cfile->fid.volatile_fid, + current->tgid, num, buf); + if (stored_rc) { + /* + * We failed on the unlock range request - add + * all locks from the tmp list to the head of + * the file's list. + */ + cifs_move_llist(&tmp_llist, + &cfile->llist->locks); + rc = stored_rc; + } else + /* + * The unlock range request succeed - free the + * tmp list. + */ + cifs_free_llist(&tmp_llist); + cur = buf; + num = 0; + } else + cur++; + } + if (num) { + stored_rc = smb2_lockv(xid, tcon, cfile->fid.persistent_fid, + cfile->fid.volatile_fid, current->tgid, + num, buf); + if (stored_rc) { + cifs_move_llist(&tmp_llist, &cfile->llist->locks); + rc = stored_rc; + } else + cifs_free_llist(&tmp_llist); + } + up_write(&cinode->lock_sem); + + kfree(buf); + return rc; +} + +static int +smb2_push_mand_fdlocks(struct cifs_fid_locks *fdlocks, const unsigned int xid, + struct smb2_lock_element *buf, unsigned int max_num) +{ + int rc = 0, stored_rc; + struct cifsFileInfo *cfile = fdlocks->cfile; + struct cifsLockInfo *li; + unsigned int num = 0; + struct smb2_lock_element *cur = buf; + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + + list_for_each_entry(li, &fdlocks->locks, llist) { + cur->Length = cpu_to_le64(li->length); + cur->Offset = cpu_to_le64(li->offset); + cur->Flags = cpu_to_le32(li->type | + SMB2_LOCKFLAG_FAIL_IMMEDIATELY); + if (++num == max_num) { + stored_rc = smb2_lockv(xid, tcon, + cfile->fid.persistent_fid, + cfile->fid.volatile_fid, + current->tgid, num, buf); + if (stored_rc) + rc = stored_rc; + cur = buf; + num = 0; + } else + cur++; + } + if (num) { + stored_rc = smb2_lockv(xid, tcon, + cfile->fid.persistent_fid, + cfile->fid.volatile_fid, + current->tgid, num, buf); + if (stored_rc) + rc = stored_rc; + } + + return rc; +} + +int +smb2_push_mandatory_locks(struct cifsFileInfo *cfile) +{ + int rc = 0, stored_rc; + unsigned int xid; + unsigned int max_num, max_buf; + struct smb2_lock_element *buf; + struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); + struct cifs_fid_locks *fdlocks; + + xid = get_xid(); + /* we are going to update can_cache_brlcks here - need a write access */ + down_write(&cinode->lock_sem); + if (!cinode->can_cache_brlcks) { + up_write(&cinode->lock_sem); + free_xid(xid); + return rc; + } + + /* + * Accessing maxBuf is racy with cifs_reconnect - need to store value + * and check it for zero before using. + */ + max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf; + if (!max_buf) { + up_write(&cinode->lock_sem); + free_xid(xid); + return -EINVAL; + } + + max_num = max_buf / sizeof(struct smb2_lock_element); + buf = kzalloc(max_num * sizeof(struct smb2_lock_element), GFP_KERNEL); + if (!buf) { + up_write(&cinode->lock_sem); + free_xid(xid); + return -ENOMEM; + } + + list_for_each_entry(fdlocks, &cinode->llist, llist) { + stored_rc = smb2_push_mand_fdlocks(fdlocks, xid, buf, max_num); + if (stored_rc) + rc = stored_rc; + } + + cinode->can_cache_brlcks = false; + kfree(buf); + + up_write(&cinode->lock_sem); + free_xid(xid); + return rc; +} diff --git a/fs/cifs/smb2glob.h b/fs/cifs/smb2glob.h index 33c1d89..7c0e214 100644 --- a/fs/cifs/smb2glob.h +++ b/fs/cifs/smb2glob.h @@ -23,6 +23,8 @@ #ifndef _SMB2_GLOB_H #define _SMB2_GLOB_H +#define SMB2_MAGIC_NUMBER 0xFE534D42 + /* ***************************************************************** * Constants go here @@ -40,5 +42,17 @@ #define SMB2_OP_MKDIR 5 #define SMB2_OP_RENAME 6 #define SMB2_OP_DELETE 7 +#define SMB2_OP_HARDLINK 8 +#define SMB2_OP_SET_EOF 9 + +/* Used when constructing chained read requests. */ +#define CHAINED_REQUEST 1 +#define START_OF_CHAIN 2 +#define END_OF_CHAIN 4 +#define RELATED_REQUEST 8 + +#define SMB2_SIGNATURE_SIZE (16) +#define SMB2_NTLMV2_SESSKEY_SIZE (16) +#define SMB2_HMACSHA256_SIZE (32) #endif /* _SMB2_GLOB_H */ diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c index 2aa5cb0..7064824 100644 --- a/fs/cifs/smb2inode.c +++ b/fs/cifs/smb2inode.c @@ -47,6 +47,7 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon, int rc, tmprc = 0; u64 persistent_fid, volatile_fid; __le16 *utf16_path; + __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); if (!utf16_path) @@ -54,7 +55,7 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon, rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid, desired_access, create_disposition, file_attributes, - create_options); + create_options, &oplock, NULL); if (rc) { kfree(utf16_path); return rc; @@ -74,6 +75,22 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon, * SMB2_open() call. */ break; + case SMB2_OP_RENAME: + tmprc = SMB2_rename(xid, tcon, persistent_fid, volatile_fid, + (__le16 *)data); + break; + case SMB2_OP_HARDLINK: + tmprc = SMB2_set_hardlink(xid, tcon, persistent_fid, + volatile_fid, (__le16 *)data); + break; + case SMB2_OP_SET_EOF: + tmprc = SMB2_set_eof(xid, tcon, persistent_fid, volatile_fid, + current->tgid, (__le64 *)data); + break; + case SMB2_OP_SET_INFO: + tmprc = SMB2_set_info(xid, tcon, persistent_fid, volatile_fid, + (FILE_BASIC_INFO *)data); + break; default: cERROR(1, "Invalid command"); break; @@ -86,7 +103,7 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon, return rc; } -static void +void move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src) { memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src); @@ -161,3 +178,80 @@ smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 0, CREATE_NOT_FILE | CREATE_DELETE_ON_CLOSE, NULL, SMB2_OP_DELETE); } + +int +smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name, + struct cifs_sb_info *cifs_sb) +{ + return smb2_open_op_close(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, + 0, CREATE_DELETE_ON_CLOSE, NULL, + SMB2_OP_DELETE); +} + +static int +smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, + const char *from_name, const char *to_name, + struct cifs_sb_info *cifs_sb, __u32 access, int command) +{ + __le16 *smb2_to_name = NULL; + int rc; + + smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb); + if (smb2_to_name == NULL) { + rc = -ENOMEM; + goto smb2_rename_path; + } + + rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access, + FILE_OPEN, 0, 0, smb2_to_name, command); +smb2_rename_path: + kfree(smb2_to_name); + return rc; +} + +int +smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon, + const char *from_name, const char *to_name, + struct cifs_sb_info *cifs_sb) +{ + return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, + DELETE, SMB2_OP_RENAME); +} + +int +smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon, + const char *from_name, const char *to_name, + struct cifs_sb_info *cifs_sb) +{ + return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, + FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK); +} + +int +smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, + const char *full_path, __u64 size, + struct cifs_sb_info *cifs_sb, bool set_alloc) +{ + __le64 eof = cpu_to_le64(size); + return smb2_open_op_close(xid, tcon, cifs_sb, full_path, + FILE_WRITE_DATA, FILE_OPEN, 0, 0, &eof, + SMB2_OP_SET_EOF); +} + +int +smb2_set_file_info(struct inode *inode, const char *full_path, + FILE_BASIC_INFO *buf, const unsigned int xid) +{ + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct tcon_link *tlink; + int rc; + + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + rc = smb2_open_op_close(xid, tlink_tcon(tlink), cifs_sb, full_path, + FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, 0, buf, + SMB2_OP_SET_INFO); + cifs_put_tlink(tlink); + return rc; +} diff --git a/fs/cifs/smb2maperror.c b/fs/cifs/smb2maperror.c index be41478..494c912 100644 --- a/fs/cifs/smb2maperror.c +++ b/fs/cifs/smb2maperror.c @@ -453,7 +453,8 @@ static const struct status_to_posix_error smb2_error_map_table[] = { {STATUS_FILE_INVALID, -EIO, "STATUS_FILE_INVALID"}, {STATUS_ALLOTTED_SPACE_EXCEEDED, -EIO, "STATUS_ALLOTTED_SPACE_EXCEEDED"}, - {STATUS_INSUFFICIENT_RESOURCES, -EIO, "STATUS_INSUFFICIENT_RESOURCES"}, + {STATUS_INSUFFICIENT_RESOURCES, -EREMOTEIO, + "STATUS_INSUFFICIENT_RESOURCES"}, {STATUS_DFS_EXIT_PATH_FOUND, -EIO, "STATUS_DFS_EXIT_PATH_FOUND"}, {STATUS_DEVICE_DATA_ERROR, -EIO, "STATUS_DEVICE_DATA_ERROR"}, {STATUS_DEVICE_NOT_CONNECTED, -EIO, "STATUS_DEVICE_NOT_CONNECTED"}, @@ -2455,7 +2456,8 @@ map_smb2_to_linux_error(char *buf, bool log_err) return 0; /* mask facility */ - if (log_err && (smb2err != (STATUS_MORE_PROCESSING_REQUIRED))) + if (log_err && (smb2err != STATUS_MORE_PROCESSING_REQUIRED) && + (smb2err != STATUS_END_OF_FILE)) smb2_print_status(smb2err); else if (cifsFYI & CIFS_RC) smb2_print_status(smb2err); diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c index a4ff5d5..7b1c5e3 100644 --- a/fs/cifs/smb2misc.c +++ b/fs/cifs/smb2misc.c @@ -52,7 +52,8 @@ check_smb2_hdr(struct smb2_hdr *hdr, __u64 mid) cERROR(1, "Bad protocol string signature header %x", *(unsigned int *) hdr->ProtocolId); if (mid != hdr->MessageId) - cERROR(1, "Mids do not match"); + cERROR(1, "Mids do not match: %llu and %llu", mid, + hdr->MessageId); } cERROR(1, "Bad SMB detected. The Mid=%llu", hdr->MessageId); return 1; @@ -107,7 +108,7 @@ smb2_check_message(char *buf, unsigned int length) * ie Validate the wct via smb2_struct_sizes table above */ - if (length < 2 + sizeof(struct smb2_hdr)) { + if (length < sizeof(struct smb2_pdu)) { if ((length >= sizeof(struct smb2_hdr)) && (hdr->Status != 0)) { pdu->StructureSize2 = 0; /* @@ -121,15 +122,15 @@ smb2_check_message(char *buf, unsigned int length) return 1; } if (len > CIFSMaxBufSize + MAX_SMB2_HDR_SIZE - 4) { - cERROR(1, "SMB length greater than maximum, mid=%lld", mid); + cERROR(1, "SMB length greater than maximum, mid=%llu", mid); return 1; } if (check_smb2_hdr(hdr, mid)) return 1; - if (hdr->StructureSize != SMB2_HEADER_SIZE) { - cERROR(1, "Illegal structure size %d", + if (hdr->StructureSize != SMB2_HEADER_STRUCTURE_SIZE) { + cERROR(1, "Illegal structure size %u", le16_to_cpu(hdr->StructureSize)); return 1; } @@ -141,12 +142,19 @@ smb2_check_message(char *buf, unsigned int length) } if (smb2_rsp_struct_sizes[command] != pdu->StructureSize2) { - if (hdr->Status == 0 || - pdu->StructureSize2 != SMB2_ERROR_STRUCTURE_SIZE2) { + if (command != SMB2_OPLOCK_BREAK_HE && (hdr->Status == 0 || + pdu->StructureSize2 != SMB2_ERROR_STRUCTURE_SIZE2)) { /* error packets have 9 byte structure size */ cERROR(1, "Illegal response size %u for command %d", le16_to_cpu(pdu->StructureSize2), command); return 1; + } else if (command == SMB2_OPLOCK_BREAK_HE && (hdr->Status == 0) + && (le16_to_cpu(pdu->StructureSize2) != 44) + && (le16_to_cpu(pdu->StructureSize2) != 36)) { + /* special case for SMB2.1 lease break message */ + cERROR(1, "Illegal response size %d for oplock break", + le16_to_cpu(pdu->StructureSize2)); + return 1; } } @@ -161,8 +169,12 @@ smb2_check_message(char *buf, unsigned int length) if (4 + len != clc_len) { cFYI(1, "Calculated size %u length %u mismatch mid %llu", clc_len, 4 + len, mid); - if (clc_len == 4 + len + 1) /* BB FIXME (fix samba) */ - return 0; /* BB workaround Samba 3 bug SessSetup rsp */ + /* Windows 7 server returns 24 bytes more */ + if (clc_len + 20 == len && command == SMB2_OPLOCK_BREAK_HE) + return 0; + /* server can return one byte more */ + if (clc_len == 4 + len + 1) + return 0; return 1; } return 0; @@ -242,7 +254,15 @@ smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *hdr) ((struct smb2_query_info_rsp *)hdr)->OutputBufferLength); break; case SMB2_READ: + *off = ((struct smb2_read_rsp *)hdr)->DataOffset; + *len = le32_to_cpu(((struct smb2_read_rsp *)hdr)->DataLength); + break; case SMB2_QUERY_DIRECTORY: + *off = le16_to_cpu( + ((struct smb2_query_directory_rsp *)hdr)->OutputBufferOffset); + *len = le32_to_cpu( + ((struct smb2_query_directory_rsp *)hdr)->OutputBufferLength); + break; case SMB2_IOCTL: case SMB2_CHANGE_NOTIFY: default: @@ -285,8 +305,9 @@ smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *hdr) * portion, the number of word parameters and the data portion of the message. */ unsigned int -smb2_calc_size(struct smb2_hdr *hdr) +smb2_calc_size(void *buf) { + struct smb2_hdr *hdr = (struct smb2_hdr *)buf; struct smb2_pdu *pdu = (struct smb2_pdu *)hdr; int offset; /* the offset from the beginning of SMB to data area */ int data_length; /* the length of the variable length data area */ @@ -345,3 +366,218 @@ cifs_convert_path_to_utf16(const char *from, struct cifs_sb_info *cifs_sb) CIFS_MOUNT_MAP_SPECIAL_CHR); return to; } + +__le32 +smb2_get_lease_state(struct cifsInodeInfo *cinode) +{ + if (cinode->clientCanCacheAll) + return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING; + else if (cinode->clientCanCacheRead) + return SMB2_LEASE_READ_CACHING; + return 0; +} + +__u8 smb2_map_lease_to_oplock(__le32 lease_state) +{ + if (lease_state & SMB2_LEASE_WRITE_CACHING) { + if (lease_state & SMB2_LEASE_HANDLE_CACHING) + return SMB2_OPLOCK_LEVEL_BATCH; + else + return SMB2_OPLOCK_LEVEL_EXCLUSIVE; + } else if (lease_state & SMB2_LEASE_READ_CACHING) + return SMB2_OPLOCK_LEVEL_II; + return 0; +} + +struct smb2_lease_break_work { + struct work_struct lease_break; + struct tcon_link *tlink; + __u8 lease_key[16]; + __le32 lease_state; +}; + +static void +cifs_ses_oplock_break(struct work_struct *work) +{ + struct smb2_lease_break_work *lw = container_of(work, + struct smb2_lease_break_work, lease_break); + int rc; + + rc = SMB2_lease_break(0, tlink_tcon(lw->tlink), lw->lease_key, + lw->lease_state); + cFYI(1, "Lease release rc %d", rc); + cifs_put_tlink(lw->tlink); + kfree(lw); +} + +static bool +smb2_is_valid_lease_break(char *buffer, struct TCP_Server_Info *server) +{ + struct smb2_lease_break *rsp = (struct smb2_lease_break *)buffer; + struct list_head *tmp, *tmp1, *tmp2; + struct cifs_ses *ses; + struct cifs_tcon *tcon; + struct cifsInodeInfo *cinode; + struct cifsFileInfo *cfile; + struct cifs_pending_open *open; + struct smb2_lease_break_work *lw; + bool found; + int ack_req = le32_to_cpu(rsp->Flags & + SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED); + + lw = kmalloc(sizeof(struct smb2_lease_break_work), GFP_KERNEL); + if (!lw) { + cERROR(1, "Memory allocation failed during lease break check"); + return false; + } + + INIT_WORK(&lw->lease_break, cifs_ses_oplock_break); + lw->lease_state = rsp->NewLeaseState; + + cFYI(1, "Checking for lease break"); + + /* look up tcon based on tid & uid */ + spin_lock(&cifs_tcp_ses_lock); + list_for_each(tmp, &server->smb_ses_list) { + ses = list_entry(tmp, struct cifs_ses, smb_ses_list); + + spin_lock(&cifs_file_list_lock); + list_for_each(tmp1, &ses->tcon_list) { + tcon = list_entry(tmp1, struct cifs_tcon, tcon_list); + + cifs_stats_inc(&tcon->stats.cifs_stats.num_oplock_brks); + list_for_each(tmp2, &tcon->openFileList) { + cfile = list_entry(tmp2, struct cifsFileInfo, + tlist); + cinode = CIFS_I(cfile->dentry->d_inode); + + if (memcmp(cinode->lease_key, rsp->LeaseKey, + SMB2_LEASE_KEY_SIZE)) + continue; + + cFYI(1, "found in the open list"); + cFYI(1, "lease key match, lease break 0x%d", + le32_to_cpu(rsp->NewLeaseState)); + + smb2_set_oplock_level(cinode, + smb2_map_lease_to_oplock(rsp->NewLeaseState)); + + if (ack_req) + cfile->oplock_break_cancelled = false; + else + cfile->oplock_break_cancelled = true; + + queue_work(cifsiod_wq, &cfile->oplock_break); + + spin_unlock(&cifs_file_list_lock); + spin_unlock(&cifs_tcp_ses_lock); + return true; + } + + found = false; + list_for_each_entry(open, &tcon->pending_opens, olist) { + if (memcmp(open->lease_key, rsp->LeaseKey, + SMB2_LEASE_KEY_SIZE)) + continue; + + if (!found && ack_req) { + found = true; + memcpy(lw->lease_key, open->lease_key, + SMB2_LEASE_KEY_SIZE); + lw->tlink = cifs_get_tlink(open->tlink); + queue_work(cifsiod_wq, + &lw->lease_break); + } + + cFYI(1, "found in the pending open list"); + cFYI(1, "lease key match, lease break 0x%d", + le32_to_cpu(rsp->NewLeaseState)); + + open->oplock = + smb2_map_lease_to_oplock(rsp->NewLeaseState); + } + if (found) { + spin_unlock(&cifs_file_list_lock); + spin_unlock(&cifs_tcp_ses_lock); + return true; + } + } + spin_unlock(&cifs_file_list_lock); + } + spin_unlock(&cifs_tcp_ses_lock); + kfree(lw); + cFYI(1, "Can not process lease break - no lease matched"); + return false; +} + +bool +smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) +{ + struct smb2_oplock_break *rsp = (struct smb2_oplock_break *)buffer; + struct list_head *tmp, *tmp1, *tmp2; + struct cifs_ses *ses; + struct cifs_tcon *tcon; + struct cifsInodeInfo *cinode; + struct cifsFileInfo *cfile; + + cFYI(1, "Checking for oplock break"); + + if (rsp->hdr.Command != SMB2_OPLOCK_BREAK) + return false; + + if (rsp->StructureSize != + smb2_rsp_struct_sizes[SMB2_OPLOCK_BREAK_HE]) { + if (le16_to_cpu(rsp->StructureSize) == 44) + return smb2_is_valid_lease_break(buffer, server); + else + return false; + } + + cFYI(1, "oplock level 0x%d", rsp->OplockLevel); + + /* look up tcon based on tid & uid */ + spin_lock(&cifs_tcp_ses_lock); + list_for_each(tmp, &server->smb_ses_list) { + ses = list_entry(tmp, struct cifs_ses, smb_ses_list); + list_for_each(tmp1, &ses->tcon_list) { + tcon = list_entry(tmp1, struct cifs_tcon, tcon_list); + + cifs_stats_inc(&tcon->stats.cifs_stats.num_oplock_brks); + spin_lock(&cifs_file_list_lock); + list_for_each(tmp2, &tcon->openFileList) { + cfile = list_entry(tmp2, struct cifsFileInfo, + tlist); + if (rsp->PersistentFid != + cfile->fid.persistent_fid || + rsp->VolatileFid != + cfile->fid.volatile_fid) + continue; + + cFYI(1, "file id match, oplock break"); + cinode = CIFS_I(cfile->dentry->d_inode); + + if (!cinode->clientCanCacheAll && + rsp->OplockLevel == SMB2_OPLOCK_LEVEL_NONE) + cfile->oplock_break_cancelled = true; + else + cfile->oplock_break_cancelled = false; + + smb2_set_oplock_level(cinode, + rsp->OplockLevel ? SMB2_OPLOCK_LEVEL_II : 0); + + queue_work(cifsiod_wq, &cfile->oplock_break); + + spin_unlock(&cifs_file_list_lock); + spin_unlock(&cifs_tcp_ses_lock); + return true; + } + spin_unlock(&cifs_file_list_lock); + spin_unlock(&cifs_tcp_ses_lock); + cFYI(1, "No matching file for oplock break"); + return true; + } + } + spin_unlock(&cifs_tcp_ses_lock); + cFYI(1, "Can not process oplock break for non-existent connection"); + return false; +} diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 826209b..4d9dbe0 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -17,11 +17,15 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include <linux/pagemap.h> +#include <linux/vfs.h> #include "cifsglob.h" #include "smb2pdu.h" #include "smb2proto.h" #include "cifsproto.h" #include "cifs_debug.h" +#include "smb2status.h" +#include "smb2glob.h" static int change_conf(struct TCP_Server_Info *server) @@ -63,6 +67,17 @@ smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add, server->in_flight--; if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP) rc = change_conf(server); + /* + * Sometimes server returns 0 credits on oplock break ack - we need to + * rebalance credits in this case. + */ + else if (server->in_flight > 0 && server->oplock_credits == 0 && + server->oplocks) { + if (server->credits > 1) { + server->credits--; + server->oplock_credits++; + } + } spin_unlock(&server->req_lock); wake_up(&server->request_q); if (rc) @@ -157,6 +172,42 @@ smb2_negotiate(const unsigned int xid, struct cifs_ses *ses) return rc; } +static unsigned int +smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) +{ + struct TCP_Server_Info *server = tcon->ses->server; + unsigned int wsize; + + /* start with specified wsize, or default */ + wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE; + wsize = min_t(unsigned int, wsize, server->max_write); + /* + * limit write size to 2 ** 16, because we don't support multicredit + * requests now. + */ + wsize = min_t(unsigned int, wsize, 2 << 15); + + return wsize; +} + +static unsigned int +smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) +{ + struct TCP_Server_Info *server = tcon->ses->server; + unsigned int rsize; + + /* start with specified rsize, or default */ + rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE; + rsize = min_t(unsigned int, rsize, server->max_read); + /* + * limit write size to 2 ** 16, because we don't support multicredit + * requests now. + */ + rsize = min_t(unsigned int, rsize, 2 << 15); + + return rsize; +} + static int smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path) @@ -164,13 +215,14 @@ smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, int rc; __u64 persistent_fid, volatile_fid; __le16 *utf16_path; + __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); if (!utf16_path) return -ENOMEM; rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid, - FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0); + FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL); if (rc) { kfree(utf16_path); return rc; @@ -190,6 +242,26 @@ smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, return 0; } +static int +smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *fid, FILE_ALL_INFO *data) +{ + int rc; + struct smb2_file_all_info *smb2_data; + + smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2, + GFP_KERNEL); + if (smb2_data == NULL) + return -ENOMEM; + + rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, + smb2_data); + if (!rc) + move_smb2_info_to_cifs(data, smb2_data); + kfree(smb2_data); + return rc; +} + static char * smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon) @@ -292,7 +364,221 @@ smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) #endif } +static void +smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) +{ + struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); + cfile->fid.persistent_fid = fid->persistent_fid; + cfile->fid.volatile_fid = fid->volatile_fid; + smb2_set_oplock_level(cinode, oplock); + cinode->can_cache_brlcks = cinode->clientCanCacheAll; +} + +static void +smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *fid) +{ + SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); +} + +static int +smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *fid) +{ + return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); +} + +static unsigned int +smb2_read_data_offset(char *buf) +{ + struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; + return rsp->DataOffset; +} + +static unsigned int +smb2_read_data_length(char *buf) +{ + struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; + return le32_to_cpu(rsp->DataLength); +} + + +static int +smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile, + struct cifs_io_parms *parms, unsigned int *bytes_read, + char **buf, int *buf_type) +{ + parms->persistent_fid = cfile->fid.persistent_fid; + parms->volatile_fid = cfile->fid.volatile_fid; + return SMB2_read(xid, parms, bytes_read, buf, buf_type); +} + +static int +smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile, + struct cifs_io_parms *parms, unsigned int *written, + struct kvec *iov, unsigned long nr_segs) +{ + + parms->persistent_fid = cfile->fid.persistent_fid; + parms->volatile_fid = cfile->fid.volatile_fid; + return SMB2_write(xid, parms, written, iov, nr_segs); +} + +static int +smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, + struct cifsFileInfo *cfile, __u64 size, bool set_alloc) +{ + __le64 eof = cpu_to_le64(size); + return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, + cfile->fid.volatile_fid, cfile->pid, &eof); +} + +static int +smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, + const char *path, struct cifs_sb_info *cifs_sb, + struct cifs_fid *fid, __u16 search_flags, + struct cifs_search_info *srch_inf) +{ + __le16 *utf16_path; + int rc; + __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; + __u64 persistent_fid, volatile_fid; + + utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); + if (!utf16_path) + return -ENOMEM; + + rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid, + FILE_READ_ATTRIBUTES | FILE_READ_DATA, FILE_OPEN, 0, 0, + &oplock, NULL); + kfree(utf16_path); + if (rc) { + cERROR(1, "open dir failed"); + return rc; + } + + srch_inf->entries_in_buffer = 0; + srch_inf->index_of_last_entry = 0; + fid->persistent_fid = persistent_fid; + fid->volatile_fid = volatile_fid; + + rc = SMB2_query_directory(xid, tcon, persistent_fid, volatile_fid, 0, + srch_inf); + if (rc) { + cERROR(1, "query directory failed"); + SMB2_close(xid, tcon, persistent_fid, volatile_fid); + } + return rc; +} + +static int +smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *fid, __u16 search_flags, + struct cifs_search_info *srch_inf) +{ + return SMB2_query_directory(xid, tcon, fid->persistent_fid, + fid->volatile_fid, 0, srch_inf); +} + +static int +smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, + struct cifs_fid *fid) +{ + return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); +} + +/* +* If we negotiate SMB2 protocol and get STATUS_PENDING - update +* the number of credits and return true. Otherwise - return false. +*/ +static bool +smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length) +{ + struct smb2_hdr *hdr = (struct smb2_hdr *)buf; + + if (hdr->Status != STATUS_PENDING) + return false; + + if (!length) { + spin_lock(&server->req_lock); + server->credits += le16_to_cpu(hdr->CreditRequest); + spin_unlock(&server->req_lock); + wake_up(&server->request_q); + } + + return true; +} + +static int +smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid, + struct cifsInodeInfo *cinode) +{ + if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) + return SMB2_lease_break(0, tcon, cinode->lease_key, + smb2_get_lease_state(cinode)); + + return SMB2_oplock_break(0, tcon, fid->persistent_fid, + fid->volatile_fid, + cinode->clientCanCacheRead ? 1 : 0); +} + +static int +smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, + struct kstatfs *buf) +{ + int rc; + u64 persistent_fid, volatile_fid; + __le16 srch_path = 0; /* Null - open root of share */ + u8 oplock = SMB2_OPLOCK_LEVEL_NONE; + + rc = SMB2_open(xid, tcon, &srch_path, &persistent_fid, &volatile_fid, + FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL); + if (rc) + return rc; + buf->f_type = SMB2_MAGIC_NUMBER; + rc = SMB2_QFS_info(xid, tcon, persistent_fid, volatile_fid, buf); + SMB2_close(xid, tcon, persistent_fid, volatile_fid); + return rc; +} + +static bool +smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) +{ + return ob1->fid.persistent_fid == ob2->fid.persistent_fid && + ob1->fid.volatile_fid == ob2->fid.volatile_fid; +} + +static int +smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, + __u64 length, __u32 type, int lock, int unlock, bool wait) +{ + if (unlock && !lock) + type = SMB2_LOCKFLAG_UNLOCK; + return SMB2_lock(xid, tlink_tcon(cfile->tlink), + cfile->fid.persistent_fid, cfile->fid.volatile_fid, + current->tgid, length, offset, type, wait); +} + +static void +smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) +{ + memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); +} + +static void +smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) +{ + memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); +} + +static void +smb2_new_lease_key(struct cifs_fid *fid) +{ + get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE); +} + struct smb_version_operations smb21_operations = { + .compare_fids = smb2_compare_fids, .setup_request = smb2_setup_request, .setup_async_request = smb2_setup_async_request, .check_receive = smb2_check_receive, @@ -301,13 +587,19 @@ struct smb_version_operations smb21_operations = { .get_credits_field = smb2_get_credits_field, .get_credits = smb2_get_credits, .get_next_mid = smb2_get_next_mid, + .read_data_offset = smb2_read_data_offset, + .read_data_length = smb2_read_data_length, + .map_error = map_smb2_to_linux_error, .find_mid = smb2_find_mid, .check_message = smb2_check_message, .dump_detail = smb2_dump_detail, .clear_stats = smb2_clear_stats, .print_stats = smb2_print_stats, + .is_oplock_break = smb2_is_valid_oplock_break, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, + .negotiate_wsize = smb2_negotiate_wsize, + .negotiate_rsize = smb2_negotiate_rsize, .sess_setup = SMB2_sess_setup, .logoff = SMB2_logoff, .tree_connect = SMB2_tcon, @@ -317,16 +609,68 @@ struct smb_version_operations smb21_operations = { .echo = SMB2_echo, .query_path_info = smb2_query_path_info, .get_srv_inum = smb2_get_srv_inum, + .query_file_info = smb2_query_file_info, + .set_path_size = smb2_set_path_size, + .set_file_size = smb2_set_file_size, + .set_file_info = smb2_set_file_info, .build_path_to_root = smb2_build_path_to_root, .mkdir = smb2_mkdir, .mkdir_setinfo = smb2_mkdir_setinfo, .rmdir = smb2_rmdir, + .unlink = smb2_unlink, + .rename = smb2_rename_path, + .create_hardlink = smb2_create_hardlink, + .open = smb2_open_file, + .set_fid = smb2_set_fid, + .close = smb2_close_file, + .flush = smb2_flush_file, + .async_readv = smb2_async_readv, + .async_writev = smb2_async_writev, + .sync_read = smb2_sync_read, + .sync_write = smb2_sync_write, + .query_dir_first = smb2_query_dir_first, + .query_dir_next = smb2_query_dir_next, + .close_dir = smb2_close_dir, + .calc_smb_size = smb2_calc_size, + .is_status_pending = smb2_is_status_pending, + .oplock_response = smb2_oplock_response, + .queryfs = smb2_queryfs, + .mand_lock = smb2_mand_lock, + .mand_unlock_range = smb2_unlock_range, + .push_mand_locks = smb2_push_mandatory_locks, + .get_lease_key = smb2_get_lease_key, + .set_lease_key = smb2_set_lease_key, + .new_lease_key = smb2_new_lease_key, }; struct smb_version_values smb21_values = { .version_string = SMB21_VERSION_STRING, + .protocol_id = SMB21_PROT_ID, + .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ + .large_lock_type = 0, + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, + .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, + .header_size = sizeof(struct smb2_hdr), + .max_header_size = MAX_SMB2_HDR_SIZE, + .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, + .lock_cmd = SMB2_LOCK, + .cap_unix = 0, + .cap_nt_find = SMB2_NT_FIND, + .cap_large_files = SMB2_LARGE_FILES, +}; + +struct smb_version_values smb30_values = { + .version_string = SMB30_VERSION_STRING, + .protocol_id = SMB30_PROT_ID, + .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU, + .large_lock_type = 0, + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, + .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_hdr), .max_header_size = MAX_SMB2_HDR_SIZE, + .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 62b3f17..cf33622 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1,7 +1,7 @@ /* * fs/cifs/smb2pdu.c * - * Copyright (C) International Business Machines Corp., 2009, 2011 + * Copyright (C) International Business Machines Corp., 2009, 2012 * Etersoft, 2012 * Author(s): Steve French (sfrench@us.ibm.com) * Pavel Shilovsky (pshilovsky@samba.org) 2012 @@ -31,7 +31,9 @@ #include <linux/fs.h> #include <linux/kernel.h> #include <linux/vfs.h> +#include <linux/task_io_accounting_ops.h> #include <linux/uaccess.h> +#include <linux/pagemap.h> #include <linux/xattr.h> #include "smb2pdu.h" #include "cifsglob.h" @@ -42,6 +44,8 @@ #include "cifs_debug.h" #include "ntlmssp.h" #include "smb2status.h" +#include "smb2glob.h" +#include "cifspdu.h" /* * The following table defines the expected "StructureSize" of SMB2 requests @@ -115,9 +119,9 @@ smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , /* BB how does SMB2 do case sensitive? */ /* if (tcon->nocase) hdr->Flags |= SMBFLG_CASELESS; */ - /* if (tcon->ses && tcon->ses->server && + if (tcon->ses && tcon->ses->server && (tcon->ses->server->sec_mode & SECMODE_SIGN_REQUIRED)) - hdr->Flags |= SMB2_FLAGS_SIGNED; */ + hdr->Flags |= SMB2_FLAGS_SIGNED; out: pdu->StructureSize2 = cpu_to_le16(parmsize); return; @@ -300,24 +304,6 @@ free_rsp_buf(int resp_buftype, void *rsp) cifs_buf_release(rsp); } -#define SMB2_NUM_PROT 1 - -#define SMB2_PROT 0 -#define SMB21_PROT 1 -#define BAD_PROT 0xFFFF - -#define SMB2_PROT_ID 0x0202 -#define SMB21_PROT_ID 0x0210 -#define BAD_PROT_ID 0xFFFF - -static struct { - int index; - __le16 name; -} smb2protocols[] = { - {SMB2_PROT, cpu_to_le16(SMB2_PROT_ID)}, - {SMB21_PROT, cpu_to_le16(SMB21_PROT_ID)}, - {BAD_PROT, cpu_to_le16(BAD_PROT_ID)} -}; /* * @@ -344,7 +330,6 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) int resp_buftype; struct TCP_Server_Info *server; unsigned int sec_flags; - u16 i; u16 temp = 0; int blob_offset, blob_length; char *security_blob; @@ -373,11 +358,10 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) req->hdr.SessionId = 0; - for (i = 0; i < SMB2_NUM_PROT; i++) - req->Dialects[i] = smb2protocols[i].name; + req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); - req->DialectCount = cpu_to_le16(i); - inc_rfc1001_len(req, i * 2); + req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */ + inc_rfc1001_len(req, 2); /* only one of SMB2 signing flags may be set in SMB2 request */ if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) @@ -387,7 +371,9 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) req->SecurityMode = cpu_to_le16(temp); - req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); + req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); + + memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE); iov[0].iov_base = (char *)req; /* 4 for rfc1002 length field */ @@ -403,17 +389,16 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) if (rc != 0) goto neg_exit; - if (rsp == NULL) { - rc = -EIO; - goto neg_exit; - } - cFYI(1, "mode 0x%x", rsp->SecurityMode); - if (rsp->DialectRevision == smb2protocols[SMB21_PROT].name) + /* BB we may eventually want to match the negotiated vs. requested + dialect, even though we are only requesting one at a time */ + if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) + cFYI(1, "negotiated smb2.0 dialect"); + else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) cFYI(1, "negotiated smb2.1 dialect"); - else if (rsp->DialectRevision == smb2protocols[SMB2_PROT].name) - cFYI(1, "negotiated smb2 dialect"); + else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) + cFYI(1, "negotiated smb3.0 dialect"); else { cERROR(1, "Illegal dialect returned by server %d", le16_to_cpu(rsp->DialectRevision)); @@ -438,6 +423,38 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) rc = -EIO; goto neg_exit; } + + cFYI(1, "sec_flags 0x%x", sec_flags); + if (sec_flags & CIFSSEC_MUST_SIGN) { + cFYI(1, "Signing required"); + if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED | + SMB2_NEGOTIATE_SIGNING_ENABLED))) { + cERROR(1, "signing required but server lacks support"); + rc = -EOPNOTSUPP; + goto neg_exit; + } + server->sec_mode |= SECMODE_SIGN_REQUIRED; + } else if (sec_flags & CIFSSEC_MAY_SIGN) { + cFYI(1, "Signing optional"); + if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) { + cFYI(1, "Server requires signing"); + server->sec_mode |= SECMODE_SIGN_REQUIRED; + } else { + server->sec_mode &= + ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED); + } + } else { + cFYI(1, "Signing disabled"); + if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) { + cERROR(1, "Server requires packet signing to be enabled" + " in /proc/fs/cifs/SecurityFlags."); + rc = -EOPNOTSUPP; + goto neg_exit; + } + server->sec_mode &= + ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED); + } + #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ rc = decode_neg_token_init(security_blob, blob_length, &server->sec_type); @@ -599,13 +616,14 @@ ssetup_ntlmssp_authenticate: kfree(security_blob); rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; - if (rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { + if (resp_buftype != CIFS_NO_BUFFER && + rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { if (phase != NtLmNegotiate) { cERROR(1, "Unexpected more processing error"); goto ssetup_exit; } if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != - le16_to_cpu(rsp->SecurityBufferOffset)) { + le16_to_cpu(rsp->SecurityBufferOffset)) { cERROR(1, "Invalid security buffer offset %d", le16_to_cpu(rsp->SecurityBufferOffset)); rc = -EIO; @@ -631,11 +649,6 @@ ssetup_ntlmssp_authenticate: if (rc != 0) goto ssetup_exit; - if (rsp == NULL) { - rc = -EIO; - goto ssetup_exit; - } - ses->session_flags = le16_to_cpu(rsp->SessionFlags); ssetup_exit: free_rsp_buf(resp_buftype, rsp); @@ -666,6 +679,8 @@ SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) /* since no tcon, smb2_init can not do this, so do here */ req->hdr.SessionId = ses->Suid; + if (server->sec_mode & SECMODE_SIGN_REQUIRED) + req->hdr.Flags |= SMB2_FLAGS_SIGNED; rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); /* @@ -753,11 +768,6 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, goto tcon_error_exit; } - if (rsp == NULL) { - rc = -EIO; - goto tcon_exit; - } - if (tcon == NULL) { ses->ipc_tid = rsp->hdr.TreeId; goto tcon_exit; @@ -830,18 +840,87 @@ SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) return rc; } +static struct create_lease * +create_lease_buf(u8 *lease_key, u8 oplock) +{ + struct create_lease *buf; + + buf = kmalloc(sizeof(struct create_lease), GFP_KERNEL); + if (!buf) + return NULL; + + memset(buf, 0, sizeof(struct create_lease)); + + buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key)); + buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8))); + if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) + buf->lcontext.LeaseState = SMB2_LEASE_WRITE_CACHING | + SMB2_LEASE_READ_CACHING; + else if (oplock == SMB2_OPLOCK_LEVEL_II) + buf->lcontext.LeaseState = SMB2_LEASE_READ_CACHING; + else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) + buf->lcontext.LeaseState = SMB2_LEASE_HANDLE_CACHING | + SMB2_LEASE_READ_CACHING | + SMB2_LEASE_WRITE_CACHING; + + buf->ccontext.DataOffset = cpu_to_le16(offsetof + (struct create_lease, lcontext)); + buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); + buf->ccontext.NameOffset = cpu_to_le16(offsetof + (struct create_lease, Name)); + buf->ccontext.NameLength = cpu_to_le16(4); + buf->Name[0] = 'R'; + buf->Name[1] = 'q'; + buf->Name[2] = 'L'; + buf->Name[3] = 's'; + return buf; +} + +static __u8 +parse_lease_state(struct smb2_create_rsp *rsp) +{ + char *data_offset; + struct create_lease *lc; + bool found = false; + + data_offset = (char *)rsp; + data_offset += 4 + le32_to_cpu(rsp->CreateContextsOffset); + lc = (struct create_lease *)data_offset; + do { + char *name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc; + if (le16_to_cpu(lc->ccontext.NameLength) != 4 || + strncmp(name, "RqLs", 4)) { + lc = (struct create_lease *)((char *)lc + + le32_to_cpu(lc->ccontext.Next)); + continue; + } + if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS) + return SMB2_OPLOCK_LEVEL_NOCHANGE; + found = true; + break; + } while (le32_to_cpu(lc->ccontext.Next) != 0); + + if (!found) + return 0; + + return smb2_map_lease_to_oplock(lc->lcontext.LeaseState); +} + int SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, - __u32 create_disposition, __u32 file_attributes, __u32 create_options) + __u32 create_disposition, __u32 file_attributes, __u32 create_options, + __u8 *oplock, struct smb2_file_all_info *buf) { struct smb2_create_req *req; struct smb2_create_rsp *rsp; struct TCP_Server_Info *server; struct cifs_ses *ses = tcon->ses; - struct kvec iov[2]; + struct kvec iov[3]; int resp_buftype; int uni_path_len; + __le16 *copy_path = NULL; + int copy_size; int rc = 0; int num_iovecs = 2; @@ -856,10 +935,6 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, if (rc) return rc; - if (enable_oplocks) - req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_BATCH; - else - req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; req->ImpersonationLevel = IL_IMPERSONATION; req->DesiredAccess = cpu_to_le32(desired_access); /* File attributes ignored on open (used in create though) */ @@ -869,7 +944,7 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, req->CreateOptions = cpu_to_le32(create_options); uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - - 1 /* pad */ - 4 /* do not count rfc1001 len field */); + - 8 /* pad */ - 4 /* do not count rfc1001 len field */); iov[0].iov_base = (char *)req; /* 4 for rfc1002 length field */ @@ -880,6 +955,20 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, req->NameLength = cpu_to_le16(uni_path_len - 2); /* -1 since last byte is buf[0] which is sent below (path) */ iov[0].iov_len--; + if (uni_path_len % 8 != 0) { + copy_size = uni_path_len / 8 * 8; + if (copy_size < uni_path_len) + copy_size += 8; + + copy_path = kzalloc(copy_size, GFP_KERNEL); + if (!copy_path) + return -ENOMEM; + memcpy((char *)copy_path, (const char *)path, + uni_path_len); + uni_path_len = copy_size; + path = copy_path; + } + iov[1].iov_len = uni_path_len; iov[1].iov_base = path; /* @@ -888,10 +977,37 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, */ inc_rfc1001_len(req, uni_path_len - 1); } else { + iov[0].iov_len += 7; + req->hdr.smb2_buf_length = cpu_to_be32(be32_to_cpu( + req->hdr.smb2_buf_length) + 8 - 1); num_iovecs = 1; req->NameLength = 0; } + if (!server->oplocks) + *oplock = SMB2_OPLOCK_LEVEL_NONE; + + if (!(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) || + *oplock == SMB2_OPLOCK_LEVEL_NONE) + req->RequestedOplockLevel = *oplock; + else { + iov[num_iovecs].iov_base = create_lease_buf(oplock+1, *oplock); + if (iov[num_iovecs].iov_base == NULL) { + cifs_small_buf_release(req); + kfree(copy_path); + return -ENOMEM; + } + iov[num_iovecs].iov_len = sizeof(struct create_lease); + req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; + req->CreateContextsOffset = cpu_to_le32( + sizeof(struct smb2_create_req) - 4 - 8 + + iov[num_iovecs-1].iov_len); + req->CreateContextsLength = cpu_to_le32( + sizeof(struct create_lease)); + inc_rfc1001_len(&req->hdr, sizeof(struct create_lease)); + num_iovecs++; + } + rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); rsp = (struct smb2_create_rsp *)iov[0].iov_base; @@ -900,13 +1016,24 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, goto creat_exit; } - if (rsp == NULL) { - rc = -EIO; - goto creat_exit; - } *persistent_fid = rsp->PersistentFileId; *volatile_fid = rsp->VolatileFileId; + + if (buf) { + memcpy(buf, &rsp->CreationTime, 32); + buf->AllocationSize = rsp->AllocationSize; + buf->EndOfFile = rsp->EndofFile; + buf->Attributes = rsp->FileAttributes; + buf->NumberOfLinks = cpu_to_le32(1); + buf->DeletePending = 0; + } + + if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) + *oplock = parse_lease_state(rsp); + else + *oplock = rsp->OplockLevel; creat_exit: + kfree(copy_path); free_rsp_buf(resp_buftype, rsp); return rc; } @@ -950,11 +1077,6 @@ SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, goto close_exit; } - if (rsp == NULL) { - rc = -EIO; - goto close_exit; - } - /* BB FIXME - decode close response, update inode for caching */ close_exit: @@ -1019,10 +1141,10 @@ validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, return 0; } -int -SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, - u64 persistent_fid, u64 volatile_fid, - struct smb2_file_all_info *data) +static int +query_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, u8 info_class, + size_t output_len, size_t min_len, void *data) { struct smb2_query_info_req *req; struct smb2_query_info_rsp *rsp = NULL; @@ -1044,37 +1166,56 @@ SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, return rc; req->InfoType = SMB2_O_INFO_FILE; - req->FileInfoClass = FILE_ALL_INFORMATION; + req->FileInfoClass = info_class; req->PersistentFileId = persistent_fid; req->VolatileFileId = volatile_fid; /* 4 for rfc1002 length field and 1 for Buffer */ req->InputBufferOffset = cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); - req->OutputBufferLength = - cpu_to_le32(sizeof(struct smb2_file_all_info) + MAX_NAME * 2); + req->OutputBufferLength = cpu_to_le32(output_len); iov[0].iov_base = (char *)req; /* 4 for rfc1002 length field */ iov[0].iov_len = get_rfc1002_length(req) + 4; rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); + rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; + if (rc) { cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); goto qinf_exit; } - rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; - rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), le32_to_cpu(rsp->OutputBufferLength), - &rsp->hdr, sizeof(struct smb2_file_all_info), - (char *)data); + &rsp->hdr, min_len, data); qinf_exit: free_rsp_buf(resp_buftype, rsp); return rc; } +int +SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + struct smb2_file_all_info *data) +{ + return query_info(xid, tcon, persistent_fid, volatile_fid, + FILE_ALL_INFORMATION, + sizeof(struct smb2_file_all_info) + MAX_NAME * 2, + sizeof(struct smb2_file_all_info), data); +} + +int +SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) +{ + return query_info(xid, tcon, persistent_fid, volatile_fid, + FILE_INTERNAL_INFORMATION, + sizeof(struct smb2_file_internal_info), + sizeof(struct smb2_file_internal_info), uniqueid); +} + /* * This is a no-op for now. We're not really interested in the reply, but * rather in the fact that the server sent one and that server->lstrp @@ -1102,6 +1243,8 @@ SMB2_echo(struct TCP_Server_Info *server) struct smb2_echo_req *req; int rc = 0; struct kvec iov; + struct smb_rqst rqst = { .rq_iov = &iov, + .rq_nvec = 1 }; cFYI(1, "In echo request"); @@ -1115,7 +1258,7 @@ SMB2_echo(struct TCP_Server_Info *server) /* 4 for rfc1002 length field */ iov.iov_len = get_rfc1002_length(req) + 4; - rc = cifs_call_async(server, &iov, 1, NULL, smb2_echo_callback, server, + rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, CIFS_ECHO_OP); if (rc) cFYI(1, "Echo request failed: %d", rc); @@ -1123,3 +1266,945 @@ SMB2_echo(struct TCP_Server_Info *server) cifs_small_buf_release(req); return rc; } + +int +SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, + u64 volatile_fid) +{ + struct smb2_flush_req *req; + struct TCP_Server_Info *server; + struct cifs_ses *ses = tcon->ses; + struct kvec iov[1]; + int resp_buftype; + int rc = 0; + + cFYI(1, "Flush"); + + if (ses && (ses->server)) + server = ses->server; + else + return -EIO; + + rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); + if (rc) + return rc; + + req->PersistentFileId = persistent_fid; + req->VolatileFileId = volatile_fid; + + iov[0].iov_base = (char *)req; + /* 4 for rfc1002 length field */ + iov[0].iov_len = get_rfc1002_length(req) + 4; + + rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); + + if ((rc != 0) && tcon) + cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); + + free_rsp_buf(resp_buftype, iov[0].iov_base); + return rc; +} + +/* + * To form a chain of read requests, any read requests after the first should + * have the end_of_chain boolean set to true. + */ +static int +smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, + unsigned int remaining_bytes, int request_type) +{ + int rc = -EACCES; + struct smb2_read_req *req = NULL; + + rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); + if (rc) + return rc; + if (io_parms->tcon->ses->server == NULL) + return -ECONNABORTED; + + req->hdr.ProcessId = cpu_to_le32(io_parms->pid); + + req->PersistentFileId = io_parms->persistent_fid; + req->VolatileFileId = io_parms->volatile_fid; + req->ReadChannelInfoOffset = 0; /* reserved */ + req->ReadChannelInfoLength = 0; /* reserved */ + req->Channel = 0; /* reserved */ + req->MinimumCount = 0; + req->Length = cpu_to_le32(io_parms->length); + req->Offset = cpu_to_le64(io_parms->offset); + + if (request_type & CHAINED_REQUEST) { + if (!(request_type & END_OF_CHAIN)) { + /* 4 for rfc1002 length field */ + req->hdr.NextCommand = + cpu_to_le32(get_rfc1002_length(req) + 4); + } else /* END_OF_CHAIN */ + req->hdr.NextCommand = 0; + if (request_type & RELATED_REQUEST) { + req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; + /* + * Related requests use info from previous read request + * in chain. + */ + req->hdr.SessionId = 0xFFFFFFFF; + req->hdr.TreeId = 0xFFFFFFFF; + req->PersistentFileId = 0xFFFFFFFF; + req->VolatileFileId = 0xFFFFFFFF; + } + } + if (remaining_bytes > io_parms->length) + req->RemainingBytes = cpu_to_le32(remaining_bytes); + else + req->RemainingBytes = 0; + + iov[0].iov_base = (char *)req; + /* 4 for rfc1002 length field */ + iov[0].iov_len = get_rfc1002_length(req) + 4; + return rc; +} + +static void +smb2_readv_callback(struct mid_q_entry *mid) +{ + struct cifs_readdata *rdata = mid->callback_data; + struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); + struct TCP_Server_Info *server = tcon->ses->server; + struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base; + unsigned int credits_received = 1; + struct smb_rqst rqst = { .rq_iov = &rdata->iov, + .rq_nvec = 1, + .rq_pages = rdata->pages, + .rq_npages = rdata->nr_pages, + .rq_pagesz = rdata->pagesz, + .rq_tailsz = rdata->tailsz }; + + cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__, + mid->mid, mid->mid_state, rdata->result, rdata->bytes); + + switch (mid->mid_state) { + case MID_RESPONSE_RECEIVED: + credits_received = le16_to_cpu(buf->CreditRequest); + /* result already set, check signature */ + if (server->sec_mode & + (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { + int rc; + + rc = smb2_verify_signature(&rqst, server); + if (rc) + cERROR(1, "SMB signature verification returned " + "error = %d", rc); + } + /* FIXME: should this be counted toward the initiating task? */ + task_io_account_read(rdata->bytes); + cifs_stats_bytes_read(tcon, rdata->bytes); + break; + case MID_REQUEST_SUBMITTED: + case MID_RETRY_NEEDED: + rdata->result = -EAGAIN; + break; + default: + if (rdata->result != -ENODATA) + rdata->result = -EIO; + } + + if (rdata->result) + cifs_stats_fail_inc(tcon, SMB2_READ_HE); + + queue_work(cifsiod_wq, &rdata->work); + DeleteMidQEntry(mid); + add_credits(server, credits_received, 0); +} + +/* smb2_async_readv - send an async write, and set up mid to handle result */ +int +smb2_async_readv(struct cifs_readdata *rdata) +{ + int rc; + struct smb2_hdr *buf; + struct cifs_io_parms io_parms; + struct smb_rqst rqst = { .rq_iov = &rdata->iov, + .rq_nvec = 1 }; + + cFYI(1, "%s: offset=%llu bytes=%u", __func__, + rdata->offset, rdata->bytes); + + io_parms.tcon = tlink_tcon(rdata->cfile->tlink); + io_parms.offset = rdata->offset; + io_parms.length = rdata->bytes; + io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; + io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; + io_parms.pid = rdata->pid; + rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0); + if (rc) + return rc; + + buf = (struct smb2_hdr *)rdata->iov.iov_base; + /* 4 for rfc1002 length field */ + rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4; + + kref_get(&rdata->refcount); + rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, + cifs_readv_receive, smb2_readv_callback, + rdata, 0); + if (rc) { + kref_put(&rdata->refcount, cifs_readdata_release); + cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); + } + + cifs_small_buf_release(buf); + return rc; +} + +int +SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, + unsigned int *nbytes, char **buf, int *buf_type) +{ + int resp_buftype, rc = -EACCES; + struct smb2_read_rsp *rsp = NULL; + struct kvec iov[1]; + + *nbytes = 0; + rc = smb2_new_read_req(iov, io_parms, 0, 0); + if (rc) + return rc; + + rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1, + &resp_buftype, CIFS_LOG_ERROR); + + rsp = (struct smb2_read_rsp *)iov[0].iov_base; + + if (rsp->hdr.Status == STATUS_END_OF_FILE) { + free_rsp_buf(resp_buftype, iov[0].iov_base); + return 0; + } + + if (rc) { + cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); + cERROR(1, "Send error in read = %d", rc); + } else { + *nbytes = le32_to_cpu(rsp->DataLength); + if ((*nbytes > CIFS_MAX_MSGSIZE) || + (*nbytes > io_parms->length)) { + cFYI(1, "bad length %d for count %d", *nbytes, + io_parms->length); + rc = -EIO; + *nbytes = 0; + } + } + + if (*buf) { + memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset, + *nbytes); + free_rsp_buf(resp_buftype, iov[0].iov_base); + } else if (resp_buftype != CIFS_NO_BUFFER) { + *buf = iov[0].iov_base; + if (resp_buftype == CIFS_SMALL_BUFFER) + *buf_type = CIFS_SMALL_BUFFER; + else if (resp_buftype == CIFS_LARGE_BUFFER) + *buf_type = CIFS_LARGE_BUFFER; + } + return rc; +} + +/* + * Check the mid_state and signature on received buffer (if any), and queue the + * workqueue completion task. + */ +static void +smb2_writev_callback(struct mid_q_entry *mid) +{ + struct cifs_writedata *wdata = mid->callback_data; + struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); + unsigned int written; + struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; + unsigned int credits_received = 1; + + switch (mid->mid_state) { + case MID_RESPONSE_RECEIVED: + credits_received = le16_to_cpu(rsp->hdr.CreditRequest); + wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); + if (wdata->result != 0) + break; + + written = le32_to_cpu(rsp->DataLength); + /* + * Mask off high 16 bits when bytes written as returned + * by the server is greater than bytes requested by the + * client. OS/2 servers are known to set incorrect + * CountHigh values. + */ + if (written > wdata->bytes) + written &= 0xFFFF; + + if (written < wdata->bytes) + wdata->result = -ENOSPC; + else + wdata->bytes = written; + break; + case MID_REQUEST_SUBMITTED: + case MID_RETRY_NEEDED: + wdata->result = -EAGAIN; + break; + default: + wdata->result = -EIO; + break; + } + + if (wdata->result) + cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); + + queue_work(cifsiod_wq, &wdata->work); + DeleteMidQEntry(mid); + add_credits(tcon->ses->server, credits_received, 0); +} + +/* smb2_async_writev - send an async write, and set up mid to handle result */ +int +smb2_async_writev(struct cifs_writedata *wdata) +{ + int rc = -EACCES; + struct smb2_write_req *req = NULL; + struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); + struct kvec iov; + struct smb_rqst rqst; + + rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); + if (rc) + goto async_writev_out; + + req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); + + req->PersistentFileId = wdata->cfile->fid.persistent_fid; + req->VolatileFileId = wdata->cfile->fid.volatile_fid; + req->WriteChannelInfoOffset = 0; + req->WriteChannelInfoLength = 0; + req->Channel = 0; + req->Offset = cpu_to_le64(wdata->offset); + /* 4 for rfc1002 length field */ + req->DataOffset = cpu_to_le16( + offsetof(struct smb2_write_req, Buffer) - 4); + req->RemainingBytes = 0; + + /* 4 for rfc1002 length field and 1 for Buffer */ + iov.iov_len = get_rfc1002_length(req) + 4 - 1; + iov.iov_base = req; + + rqst.rq_iov = &iov; + rqst.rq_nvec = 1; + rqst.rq_pages = wdata->pages; + rqst.rq_npages = wdata->nr_pages; + rqst.rq_pagesz = wdata->pagesz; + rqst.rq_tailsz = wdata->tailsz; + + cFYI(1, "async write at %llu %u bytes", wdata->offset, wdata->bytes); + + req->Length = cpu_to_le32(wdata->bytes); + + inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); + + kref_get(&wdata->refcount); + rc = cifs_call_async(tcon->ses->server, &rqst, NULL, + smb2_writev_callback, wdata, 0); + + if (rc) { + kref_put(&wdata->refcount, cifs_writedata_release); + cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); + } + +async_writev_out: + cifs_small_buf_release(req); + return rc; +} + +/* + * SMB2_write function gets iov pointer to kvec array with n_vec as a length. + * The length field from io_parms must be at least 1 and indicates a number of + * elements with data to write that begins with position 1 in iov array. All + * data length is specified by count. + */ +int +SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, + unsigned int *nbytes, struct kvec *iov, int n_vec) +{ + int rc = 0; + struct smb2_write_req *req = NULL; + struct smb2_write_rsp *rsp = NULL; + int resp_buftype; + *nbytes = 0; + + if (n_vec < 1) + return rc; + + rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req); + if (rc) + return rc; + + if (io_parms->tcon->ses->server == NULL) + return -ECONNABORTED; + + req->hdr.ProcessId = cpu_to_le32(io_parms->pid); + + req->PersistentFileId = io_parms->persistent_fid; + req->VolatileFileId = io_parms->volatile_fid; + req->WriteChannelInfoOffset = 0; + req->WriteChannelInfoLength = 0; + req->Channel = 0; + req->Length = cpu_to_le32(io_parms->length); + req->Offset = cpu_to_le64(io_parms->offset); + /* 4 for rfc1002 length field */ + req->DataOffset = cpu_to_le16( + offsetof(struct smb2_write_req, Buffer) - 4); + req->RemainingBytes = 0; + + iov[0].iov_base = (char *)req; + /* 4 for rfc1002 length field and 1 for Buffer */ + iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; + + /* length of entire message including data to be written */ + inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */); + + rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1, + &resp_buftype, 0); + rsp = (struct smb2_write_rsp *)iov[0].iov_base; + + if (rc) { + cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); + cERROR(1, "Send error in write = %d", rc); + } else + *nbytes = le32_to_cpu(rsp->DataLength); + + free_rsp_buf(resp_buftype, rsp); + return rc; +} + +static unsigned int +num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) +{ + int len; + unsigned int entrycount = 0; + unsigned int next_offset = 0; + FILE_DIRECTORY_INFO *entryptr; + + if (bufstart == NULL) + return 0; + + entryptr = (FILE_DIRECTORY_INFO *)bufstart; + + while (1) { + entryptr = (FILE_DIRECTORY_INFO *) + ((char *)entryptr + next_offset); + + if ((char *)entryptr + size > end_of_buf) { + cERROR(1, "malformed search entry would overflow"); + break; + } + + len = le32_to_cpu(entryptr->FileNameLength); + if ((char *)entryptr + len + size > end_of_buf) { + cERROR(1, "directory entry name would overflow frame " + "end of buf %p", end_of_buf); + break; + } + + *lastentry = (char *)entryptr; + entrycount++; + + next_offset = le32_to_cpu(entryptr->NextEntryOffset); + if (!next_offset) + break; + } + + return entrycount; +} + +/* + * Readdir/FindFirst + */ +int +SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, int index, + struct cifs_search_info *srch_inf) +{ + struct smb2_query_directory_req *req; + struct smb2_query_directory_rsp *rsp = NULL; + struct kvec iov[2]; + int rc = 0; + int len; + int resp_buftype; + unsigned char *bufptr; + struct TCP_Server_Info *server; + struct cifs_ses *ses = tcon->ses; + __le16 asteriks = cpu_to_le16('*'); + char *end_of_smb; + unsigned int output_size = CIFSMaxBufSize; + size_t info_buf_size; + + if (ses && (ses->server)) + server = ses->server; + else + return -EIO; + + rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req); + if (rc) + return rc; + + switch (srch_inf->info_level) { + case SMB_FIND_FILE_DIRECTORY_INFO: + req->FileInformationClass = FILE_DIRECTORY_INFORMATION; + info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; + break; + case SMB_FIND_FILE_ID_FULL_DIR_INFO: + req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; + info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; + break; + default: + cERROR(1, "info level %u isn't supported", + srch_inf->info_level); + rc = -EINVAL; + goto qdir_exit; + } + + req->FileIndex = cpu_to_le32(index); + req->PersistentFileId = persistent_fid; + req->VolatileFileId = volatile_fid; + + len = 0x2; + bufptr = req->Buffer; + memcpy(bufptr, &asteriks, len); + + req->FileNameOffset = + cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4); + req->FileNameLength = cpu_to_le16(len); + /* + * BB could be 30 bytes or so longer if we used SMB2 specific + * buffer lengths, but this is safe and close enough. + */ + output_size = min_t(unsigned int, output_size, server->maxBuf); + output_size = min_t(unsigned int, output_size, 2 << 15); + req->OutputBufferLength = cpu_to_le32(output_size); + + iov[0].iov_base = (char *)req; + /* 4 for RFC1001 length and 1 for Buffer */ + iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; + + iov[1].iov_base = (char *)(req->Buffer); + iov[1].iov_len = len; + + inc_rfc1001_len(req, len - 1 /* Buffer */); + + rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); + rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base; + + if (rc) { + cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); + goto qdir_exit; + } + + rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), + le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, + info_buf_size); + if (rc) + goto qdir_exit; + + srch_inf->unicode = true; + + if (srch_inf->ntwrk_buf_start) { + if (srch_inf->smallBuf) + cifs_small_buf_release(srch_inf->ntwrk_buf_start); + else + cifs_buf_release(srch_inf->ntwrk_buf_start); + } + srch_inf->ntwrk_buf_start = (char *)rsp; + srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + + (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); + /* 4 for rfc1002 length field */ + end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; + srch_inf->entries_in_buffer = + num_entries(srch_inf->srch_entries_start, end_of_smb, + &srch_inf->last_entry, info_buf_size); + srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; + cFYI(1, "num entries %d last_index %lld srch start %p srch end %p", + srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, + srch_inf->srch_entries_start, srch_inf->last_entry); + if (resp_buftype == CIFS_LARGE_BUFFER) + srch_inf->smallBuf = false; + else if (resp_buftype == CIFS_SMALL_BUFFER) + srch_inf->smallBuf = true; + else + cERROR(1, "illegal search buffer type"); + + if (rsp->hdr.Status == STATUS_NO_MORE_FILES) + srch_inf->endOfSearch = 1; + else + srch_inf->endOfSearch = 0; + + return rc; + +qdir_exit: + free_rsp_buf(resp_buftype, rsp); + return rc; +} + +static int +send_set_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class, + unsigned int num, void **data, unsigned int *size) +{ + struct smb2_set_info_req *req; + struct smb2_set_info_rsp *rsp = NULL; + struct kvec *iov; + int rc = 0; + int resp_buftype; + unsigned int i; + struct TCP_Server_Info *server; + struct cifs_ses *ses = tcon->ses; + + if (ses && (ses->server)) + server = ses->server; + else + return -EIO; + + if (!num) + return -EINVAL; + + iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); + if (!iov) + return -ENOMEM; + + rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req); + if (rc) { + kfree(iov); + return rc; + } + + req->hdr.ProcessId = cpu_to_le32(pid); + + req->InfoType = SMB2_O_INFO_FILE; + req->FileInfoClass = info_class; + req->PersistentFileId = persistent_fid; + req->VolatileFileId = volatile_fid; + + /* 4 for RFC1001 length and 1 for Buffer */ + req->BufferOffset = + cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4); + req->BufferLength = cpu_to_le32(*size); + + inc_rfc1001_len(req, *size - 1 /* Buffer */); + + memcpy(req->Buffer, *data, *size); + + iov[0].iov_base = (char *)req; + /* 4 for RFC1001 length */ + iov[0].iov_len = get_rfc1002_length(req) + 4; + + for (i = 1; i < num; i++) { + inc_rfc1001_len(req, size[i]); + le32_add_cpu(&req->BufferLength, size[i]); + iov[i].iov_base = (char *)data[i]; + iov[i].iov_len = size[i]; + } + + rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0); + rsp = (struct smb2_set_info_rsp *)iov[0].iov_base; + + if (rc != 0) { + cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); + goto out; + } +out: + free_rsp_buf(resp_buftype, rsp); + kfree(iov); + return rc; +} + +int +SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, __le16 *target_file) +{ + struct smb2_file_rename_info info; + void **data; + unsigned int size[2]; + int rc; + int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); + + data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); + if (!data) + return -ENOMEM; + + info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ + /* 0 = fail if target already exists */ + info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ + info.FileNameLength = cpu_to_le32(len); + + data[0] = &info; + size[0] = sizeof(struct smb2_file_rename_info); + + data[1] = target_file; + size[1] = len + 2 /* null */; + + rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, + current->tgid, FILE_RENAME_INFORMATION, 2, data, + size); + kfree(data); + return rc; +} + +int +SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, __le16 *target_file) +{ + struct smb2_file_link_info info; + void **data; + unsigned int size[2]; + int rc; + int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); + + data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); + if (!data) + return -ENOMEM; + + info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ + /* 0 = fail if link already exists */ + info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ + info.FileNameLength = cpu_to_le32(len); + + data[0] = &info; + size[0] = sizeof(struct smb2_file_link_info); + + data[1] = target_file; + size[1] = len + 2 /* null */; + + rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, + current->tgid, FILE_LINK_INFORMATION, 2, data, size); + kfree(data); + return rc; +} + +int +SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, + u64 volatile_fid, u32 pid, __le64 *eof) +{ + struct smb2_file_eof_info info; + void *data; + unsigned int size; + + info.EndOfFile = *eof; + + data = &info; + size = sizeof(struct smb2_file_eof_info); + + return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid, + FILE_END_OF_FILE_INFORMATION, 1, &data, &size); +} + +int +SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) +{ + unsigned int size; + size = sizeof(FILE_BASIC_INFO); + return send_set_info(xid, tcon, persistent_fid, volatile_fid, + current->tgid, FILE_BASIC_INFORMATION, 1, + (void **)&buf, &size); +} + +int +SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, + const u64 persistent_fid, const u64 volatile_fid, + __u8 oplock_level) +{ + int rc; + struct smb2_oplock_break *req = NULL; + + cFYI(1, "SMB2_oplock_break"); + rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); + + if (rc) + return rc; + + req->VolatileFid = volatile_fid; + req->PersistentFid = persistent_fid; + req->OplockLevel = oplock_level; + req->hdr.CreditRequest = cpu_to_le16(1); + + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); + /* SMB2 buffer freed by function above */ + + if (rc) { + cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); + cFYI(1, "Send error in Oplock Break = %d", rc); + } + + return rc; +} + +static void +copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, + struct kstatfs *kst) +{ + kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * + le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); + kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); + kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits); + kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); + return; +} + +static int +build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, + int outbuf_len, u64 persistent_fid, u64 volatile_fid) +{ + int rc; + struct smb2_query_info_req *req; + + cFYI(1, "Query FSInfo level %d", level); + + if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) + return -EIO; + + rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); + if (rc) + return rc; + + req->InfoType = SMB2_O_INFO_FILESYSTEM; + req->FileInfoClass = level; + req->PersistentFileId = persistent_fid; + req->VolatileFileId = volatile_fid; + /* 4 for rfc1002 length field and 1 for pad */ + req->InputBufferOffset = + cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); + req->OutputBufferLength = cpu_to_le32( + outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); + + iov->iov_base = (char *)req; + /* 4 for rfc1002 length field */ + iov->iov_len = get_rfc1002_length(req) + 4; + return 0; +} + +int +SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) +{ + struct smb2_query_info_rsp *rsp = NULL; + struct kvec iov; + int rc = 0; + int resp_buftype; + struct cifs_ses *ses = tcon->ses; + struct smb2_fs_full_size_info *info = NULL; + + rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, + sizeof(struct smb2_fs_full_size_info), + persistent_fid, volatile_fid); + if (rc) + return rc; + + rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); + if (rc) { + cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); + goto qinf_exit; + } + rsp = (struct smb2_query_info_rsp *)iov.iov_base; + + info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + + le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); + rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), + le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, + sizeof(struct smb2_fs_full_size_info)); + if (!rc) + copy_fs_info_to_kstatfs(info, fsdata); + +qinf_exit: + free_rsp_buf(resp_buftype, iov.iov_base); + return rc; +} + +int +smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, + const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, + const __u32 num_lock, struct smb2_lock_element *buf) +{ + int rc = 0; + struct smb2_lock_req *req = NULL; + struct kvec iov[2]; + int resp_buf_type; + unsigned int count; + + cFYI(1, "smb2_lockv num lock %d", num_lock); + + rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req); + if (rc) + return rc; + + req->hdr.ProcessId = cpu_to_le32(pid); + req->LockCount = cpu_to_le16(num_lock); + + req->PersistentFileId = persist_fid; + req->VolatileFileId = volatile_fid; + + count = num_lock * sizeof(struct smb2_lock_element); + inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element)); + + iov[0].iov_base = (char *)req; + /* 4 for rfc1002 length field and count for all locks */ + iov[0].iov_len = get_rfc1002_length(req) + 4 - count; + iov[1].iov_base = (char *)buf; + iov[1].iov_len = count; + + cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); + rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); + if (rc) { + cFYI(1, "Send error in smb2_lockv = %d", rc); + cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); + } + + return rc; +} + +int +SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, + const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, + const __u64 length, const __u64 offset, const __u32 lock_flags, + const bool wait) +{ + struct smb2_lock_element lock; + + lock.Offset = cpu_to_le64(offset); + lock.Length = cpu_to_le64(length); + lock.Flags = cpu_to_le32(lock_flags); + if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) + lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); + + return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); +} + +int +SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, + __u8 *lease_key, const __le32 lease_state) +{ + int rc; + struct smb2_lease_ack *req = NULL; + + cFYI(1, "SMB2_lease_break"); + rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); + + if (rc) + return rc; + + req->hdr.CreditRequest = cpu_to_le16(1); + req->StructureSize = cpu_to_le16(36); + inc_rfc1001_len(req, 12); + + memcpy(req->LeaseKey, lease_key, 16); + req->LeaseState = lease_state; + + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); + /* SMB2 buffer freed by function above */ + + if (rc) { + cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); + cFYI(1, "Send error in Lease Break = %d", rc); + } + + return rc; +} diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h index f37a1b4..4cb4ced 100644 --- a/fs/cifs/smb2pdu.h +++ b/fs/cifs/smb2pdu.h @@ -87,10 +87,6 @@ #define SMB2_PROTO_NUMBER __constant_cpu_to_le32(0x424d53fe) -#define SMB2_HEADER_SIZE __constant_le16_to_cpu(64) - -#define SMB2_ERROR_STRUCTURE_SIZE2 __constant_le16_to_cpu(9) - /* * SMB2 Header Definition * @@ -99,6 +95,9 @@ * "PDU" : "Protocol Data Unit" (ie a network "frame") * */ + +#define SMB2_HEADER_STRUCTURE_SIZE __constant_cpu_to_le16(64) + struct smb2_hdr { __be32 smb2_buf_length; /* big endian on wire */ /* length is only two or three bytes - with @@ -140,6 +139,9 @@ struct smb2_pdu { * command code name for the struct. Note that structures must be packed. * */ + +#define SMB2_ERROR_STRUCTURE_SIZE2 __constant_cpu_to_le16(9) + struct smb2_err_rsp { struct smb2_hdr hdr; __le16 StructureSize; @@ -148,6 +150,10 @@ struct smb2_err_rsp { __u8 ErrorData[1]; /* variable length */ } __packed; +#define SMB2_CLIENT_GUID_SIZE 16 + +extern __u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE]; + struct smb2_negotiate_req { struct smb2_hdr hdr; __le16 StructureSize; /* Must be 36 */ @@ -155,11 +161,17 @@ struct smb2_negotiate_req { __le16 SecurityMode; __le16 Reserved; /* MBZ */ __le32 Capabilities; - __u8 ClientGUID[16]; /* MBZ */ + __u8 ClientGUID[SMB2_CLIENT_GUID_SIZE]; __le64 ClientStartTime; /* MBZ */ - __le16 Dialects[2]; /* variable length */ + __le16 Dialects[1]; /* One dialect (vers=) at a time for now */ } __packed; +/* Dialects */ +#define SMB20_PROT_ID 0x0202 +#define SMB21_PROT_ID 0x0210 +#define SMB30_PROT_ID 0x0300 +#define BAD_PROT_ID 0xFFFF + /* SecurityMode flags */ #define SMB2_NEGOTIATE_SIGNING_ENABLED 0x0001 #define SMB2_NEGOTIATE_SIGNING_REQUIRED 0x0002 @@ -167,6 +179,10 @@ struct smb2_negotiate_req { #define SMB2_GLOBAL_CAP_DFS 0x00000001 #define SMB2_GLOBAL_CAP_LEASING 0x00000002 /* Resp only New to SMB2.1 */ #define SMB2_GLOBAL_CAP_LARGE_MTU 0X00000004 /* Resp only New to SMB2.1 */ +#define SMB2_GLOBAL_CAP_MULTI_CHANNEL 0x00000008 /* New to SMB3 */ +#define SMB2_GLOBAL_CAP_PERSISTENT_HANDLES 0x00000010 /* New to SMB3 */ +#define SMB2_GLOBAL_CAP_DIRECTORY_LEASING 0x00000020 /* New to SMB3 */ +#define SMB2_GLOBAL_CAP_ENCRYPTION 0x00000040 /* New to SMB3 */ /* Internal types */ #define SMB2_NT_FIND 0x00100000 #define SMB2_LARGE_FILES 0x00200000 @@ -305,6 +321,8 @@ struct smb2_tree_disconnect_rsp { #define SMB2_OPLOCK_LEVEL_EXCLUSIVE 0x08 #define SMB2_OPLOCK_LEVEL_BATCH 0x09 #define SMB2_OPLOCK_LEVEL_LEASE 0xFF +/* Non-spec internal type */ +#define SMB2_OPLOCK_LEVEL_NOCHANGE 0x99 /* Desired Access Flags */ #define FILE_READ_DATA_LE cpu_to_le32(0x00000001) @@ -402,7 +420,7 @@ struct smb2_create_req { __le16 NameLength; __le32 CreateContextsOffset; __le32 CreateContextsLength; - __u8 Buffer[1]; + __u8 Buffer[8]; } __packed; struct smb2_create_rsp { @@ -426,6 +444,39 @@ struct smb2_create_rsp { __u8 Buffer[1]; } __packed; +struct create_context { + __le32 Next; + __le16 NameOffset; + __le16 NameLength; + __le16 Reserved; + __le16 DataOffset; + __le32 DataLength; + __u8 Buffer[0]; +} __packed; + +#define SMB2_LEASE_NONE __constant_cpu_to_le32(0x00) +#define SMB2_LEASE_READ_CACHING __constant_cpu_to_le32(0x01) +#define SMB2_LEASE_HANDLE_CACHING __constant_cpu_to_le32(0x02) +#define SMB2_LEASE_WRITE_CACHING __constant_cpu_to_le32(0x04) + +#define SMB2_LEASE_FLAG_BREAK_IN_PROGRESS __constant_cpu_to_le32(0x02) + +#define SMB2_LEASE_KEY_SIZE 16 + +struct lease_context { + __le64 LeaseKeyLow; + __le64 LeaseKeyHigh; + __le32 LeaseState; + __le32 LeaseFlags; + __le64 LeaseDuration; +} __packed; + +struct create_lease { + struct create_context ccontext; + __u8 Name[8]; + struct lease_context lcontext; +} __packed; + /* Currently defined values for close flags */ #define SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB cpu_to_le16(0x0001) struct smb2_close_req { @@ -451,6 +502,108 @@ struct smb2_close_rsp { __le32 Attributes; } __packed; +struct smb2_flush_req { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 24 */ + __le16 Reserved1; + __le32 Reserved2; + __u64 PersistentFileId; /* opaque endianness */ + __u64 VolatileFileId; /* opaque endianness */ +} __packed; + +struct smb2_flush_rsp { + struct smb2_hdr hdr; + __le16 StructureSize; + __le16 Reserved; +} __packed; + +struct smb2_read_req { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 49 */ + __u8 Padding; /* offset from start of SMB2 header to place read */ + __u8 Reserved; + __le32 Length; + __le64 Offset; + __u64 PersistentFileId; /* opaque endianness */ + __u64 VolatileFileId; /* opaque endianness */ + __le32 MinimumCount; + __le32 Channel; /* Reserved MBZ */ + __le32 RemainingBytes; + __le16 ReadChannelInfoOffset; /* Reserved MBZ */ + __le16 ReadChannelInfoLength; /* Reserved MBZ */ + __u8 Buffer[1]; +} __packed; + +struct smb2_read_rsp { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 17 */ + __u8 DataOffset; + __u8 Reserved; + __le32 DataLength; + __le32 DataRemaining; + __u32 Reserved2; + __u8 Buffer[1]; +} __packed; + +/* For write request Flags field below the following flag is defined: */ +#define SMB2_WRITEFLAG_WRITE_THROUGH 0x00000001 + +struct smb2_write_req { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 49 */ + __le16 DataOffset; /* offset from start of SMB2 header to write data */ + __le32 Length; + __le64 Offset; + __u64 PersistentFileId; /* opaque endianness */ + __u64 VolatileFileId; /* opaque endianness */ + __le32 Channel; /* Reserved MBZ */ + __le32 RemainingBytes; + __le16 WriteChannelInfoOffset; /* Reserved MBZ */ + __le16 WriteChannelInfoLength; /* Reserved MBZ */ + __le32 Flags; + __u8 Buffer[1]; +} __packed; + +struct smb2_write_rsp { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 17 */ + __u8 DataOffset; + __u8 Reserved; + __le32 DataLength; + __le32 DataRemaining; + __u32 Reserved2; + __u8 Buffer[1]; +} __packed; + +#define SMB2_LOCKFLAG_SHARED_LOCK 0x0001 +#define SMB2_LOCKFLAG_EXCLUSIVE_LOCK 0x0002 +#define SMB2_LOCKFLAG_UNLOCK 0x0004 +#define SMB2_LOCKFLAG_FAIL_IMMEDIATELY 0x0010 + +struct smb2_lock_element { + __le64 Offset; + __le64 Length; + __le32 Flags; + __le32 Reserved; +} __packed; + +struct smb2_lock_req { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 48 */ + __le16 LockCount; + __le32 Reserved; + __u64 PersistentFileId; /* opaque endianness */ + __u64 VolatileFileId; /* opaque endianness */ + /* Followed by at least one */ + struct smb2_lock_element locks[1]; +} __packed; + +struct smb2_lock_rsp { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 4 */ + __le16 Reserved; +} __packed; + struct smb2_echo_req { struct smb2_hdr hdr; __le16 StructureSize; /* Must be 4 */ @@ -463,6 +616,34 @@ struct smb2_echo_rsp { __u16 Reserved; } __packed; +/* search (query_directory) Flags field */ +#define SMB2_RESTART_SCANS 0x01 +#define SMB2_RETURN_SINGLE_ENTRY 0x02 +#define SMB2_INDEX_SPECIFIED 0x04 +#define SMB2_REOPEN 0x10 + +struct smb2_query_directory_req { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 33 */ + __u8 FileInformationClass; + __u8 Flags; + __le32 FileIndex; + __u64 PersistentFileId; /* opaque endianness */ + __u64 VolatileFileId; /* opaque endianness */ + __le16 FileNameOffset; + __le16 FileNameLength; + __le32 OutputBufferLength; + __u8 Buffer[1]; +} __packed; + +struct smb2_query_directory_rsp { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 9 */ + __le16 OutputBufferOffset; + __le32 OutputBufferLength; + __u8 Buffer[1]; +} __packed; + /* Possible InfoType values */ #define SMB2_O_INFO_FILE 0x01 #define SMB2_O_INFO_FILESYSTEM 0x02 @@ -493,11 +674,84 @@ struct smb2_query_info_rsp { __u8 Buffer[1]; } __packed; +struct smb2_set_info_req { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 33 */ + __u8 InfoType; + __u8 FileInfoClass; + __le32 BufferLength; + __le16 BufferOffset; + __u16 Reserved; + __le32 AdditionalInformation; + __u64 PersistentFileId; /* opaque endianness */ + __u64 VolatileFileId; /* opaque endianness */ + __u8 Buffer[1]; +} __packed; + +struct smb2_set_info_rsp { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 2 */ +} __packed; + +struct smb2_oplock_break { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 24 */ + __u8 OplockLevel; + __u8 Reserved; + __le32 Reserved2; + __u64 PersistentFid; + __u64 VolatileFid; +} __packed; + +#define SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED cpu_to_le32(0x01) + +struct smb2_lease_break { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 44 */ + __le16 Reserved; + __le32 Flags; + __u8 LeaseKey[16]; + __le32 CurrentLeaseState; + __le32 NewLeaseState; + __le32 BreakReason; + __le32 AccessMaskHint; + __le32 ShareMaskHint; +} __packed; + +struct smb2_lease_ack { + struct smb2_hdr hdr; + __le16 StructureSize; /* Must be 36 */ + __le16 Reserved; + __le32 Flags; + __u8 LeaseKey[16]; + __le32 LeaseState; + __le64 LeaseDuration; +} __packed; + /* * PDU infolevel structure definitions * BB consider moving to a different header */ +/* File System Information Classes */ +#define FS_VOLUME_INFORMATION 1 /* Query */ +#define FS_LABEL_INFORMATION 2 /* Set */ +#define FS_SIZE_INFORMATION 3 /* Query */ +#define FS_DEVICE_INFORMATION 4 /* Query */ +#define FS_ATTRIBUTE_INFORMATION 5 /* Query */ +#define FS_CONTROL_INFORMATION 6 /* Query, Set */ +#define FS_FULL_SIZE_INFORMATION 7 /* Query */ +#define FS_OBJECT_ID_INFORMATION 8 /* Query, Set */ +#define FS_DRIVER_PATH_INFORMATION 9 /* Query */ + +struct smb2_fs_full_size_info { + __le64 TotalAllocationUnits; + __le64 CallerAvailableAllocationUnits; + __le64 ActualAvailableAllocationUnits; + __le32 SectorsPerAllocationUnit; + __le32 BytesPerSector; +} __packed; + /* partial list of QUERY INFO levels */ #define FILE_DIRECTORY_INFORMATION 1 #define FILE_FULL_DIRECTORY_INFORMATION 2 @@ -546,6 +800,28 @@ struct smb2_query_info_rsp { #define FILEID_GLOBAL_TX_DIRECTORY_INFORMATION 50 #define FILE_STANDARD_LINK_INFORMATION 54 +struct smb2_file_internal_info { + __le64 IndexNumber; +} __packed; /* level 6 Query */ + +struct smb2_file_rename_info { /* encoding of request for level 10 */ + __u8 ReplaceIfExists; /* 1 = replace existing target with new */ + /* 0 = fail if target already exists */ + __u8 Reserved[7]; + __u64 RootDirectory; /* MBZ for network operations (why says spec?) */ + __le32 FileNameLength; + char FileName[0]; /* New name to be assigned */ +} __packed; /* level 10 Set */ + +struct smb2_file_link_info { /* encoding of request for level 11 */ + __u8 ReplaceIfExists; /* 1 = replace existing link with new */ + /* 0 = fail if link already exists */ + __u8 Reserved[7]; + __u64 RootDirectory; /* MBZ for network operations (why says spec?) */ + __le32 FileNameLength; + char FileName[0]; /* Name to be assigned to new link */ +} __packed; /* level 11 Set */ + /* * This level 18, although with struct with same name is different from cifs * level 0x107. Level 0x107 has an extra u64 between AccessFlags and @@ -574,4 +850,8 @@ struct smb2_file_all_info { /* data block encoding of response to level 18 */ char FileName[1]; } __packed; /* level 18 Query */ +struct smb2_file_eof_info { /* encoding of request for level 10 */ + __le64 EndOfFile; /* new end of file value */ +} __packed; /* level 20 Set */ + #endif /* _SMB2PDU_H */ diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index bfaa7b1..7d25f8b 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -26,6 +26,7 @@ #include <linux/key-type.h> struct statfs; +struct smb_rqst; /* ***************************************************************** @@ -34,24 +35,35 @@ struct statfs; */ extern int map_smb2_to_linux_error(char *buf, bool log_err); extern int smb2_check_message(char *buf, unsigned int length); -extern unsigned int smb2_calc_size(struct smb2_hdr *hdr); +extern unsigned int smb2_calc_size(void *buf); extern char *smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *hdr); extern __le16 *cifs_convert_path_to_utf16(const char *from, struct cifs_sb_info *cifs_sb); +extern int smb2_verify_signature(struct smb_rqst *, struct TCP_Server_Info *); extern int smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, bool log_error); -extern int smb2_setup_request(struct cifs_ses *ses, struct kvec *iov, - unsigned int nvec, struct mid_q_entry **ret_mid); -extern int smb2_setup_async_request(struct TCP_Server_Info *server, - struct kvec *iov, unsigned int nvec, - struct mid_q_entry **ret_mid); +extern struct mid_q_entry *smb2_setup_request(struct cifs_ses *ses, + struct smb_rqst *rqst); +extern struct mid_q_entry *smb2_setup_async_request( + struct TCP_Server_Info *server, struct smb_rqst *rqst); extern void smb2_echo_request(struct work_struct *work); +extern __le32 smb2_get_lease_state(struct cifsInodeInfo *cinode); +extern __u8 smb2_map_lease_to_oplock(__le32 lease_state); +extern bool smb2_is_valid_oplock_break(char *buffer, + struct TCP_Server_Info *srv); +extern void move_smb2_info_to_cifs(FILE_ALL_INFO *dst, + struct smb2_file_all_info *src); extern int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path, FILE_ALL_INFO *data, bool *adjust_tz); +extern int smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, + const char *full_path, __u64 size, + struct cifs_sb_info *cifs_sb, bool set_alloc); +extern int smb2_set_file_info(struct inode *inode, const char *full_path, + FILE_BASIC_INFO *buf, const unsigned int xid); extern int smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, struct cifs_sb_info *cifs_sb); extern void smb2_mkdir_setinfo(struct inode *inode, const char *full_path, @@ -59,6 +71,24 @@ extern void smb2_mkdir_setinfo(struct inode *inode, const char *full_path, struct cifs_tcon *tcon, const unsigned int xid); extern int smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, struct cifs_sb_info *cifs_sb); +extern int smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, + const char *name, struct cifs_sb_info *cifs_sb); +extern int smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon, + const char *from_name, const char *to_name, + struct cifs_sb_info *cifs_sb); +extern int smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon, + const char *from_name, const char *to_name, + struct cifs_sb_info *cifs_sb); + +extern int smb2_open_file(const unsigned int xid, struct cifs_tcon *tcon, + const char *full_path, int disposition, + int desired_access, int create_options, + struct cifs_fid *fid, __u32 *oplock, + FILE_ALL_INFO *buf, struct cifs_sb_info *cifs_sb); +extern void smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock); +extern int smb2_unlock_range(struct cifsFileInfo *cfile, + struct file_lock *flock, const unsigned int xid); +extern int smb2_push_mandatory_locks(struct cifsFileInfo *cfile); /* * SMB2 Worker functions - most of protocol specific implementation details @@ -75,12 +105,55 @@ extern int SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon); extern int SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, __u32 create_disposition, - __u32 file_attributes, __u32 create_options); + __u32 file_attributes, __u32 create_options, + __u8 *oplock, struct smb2_file_all_info *buf); extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_file_id, u64 volatile_file_id); +extern int SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_file_id, u64 volatile_file_id); extern int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_file_id, u64 volatile_file_id, struct smb2_file_all_info *data); +extern int SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + __le64 *uniqueid); +extern int smb2_async_readv(struct cifs_readdata *rdata); +extern int SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, + unsigned int *nbytes, char **buf, int *buf_type); +extern int smb2_async_writev(struct cifs_writedata *wdata); +extern int SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, + unsigned int *nbytes, struct kvec *iov, int n_vec); extern int SMB2_echo(struct TCP_Server_Info *server); +extern int SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, int index, + struct cifs_search_info *srch_inf); +extern int SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + __le16 *target_file); +extern int SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + __le16 *target_file); +extern int SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, u32 pid, + __le64 *eof); +extern int SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_fid, u64 volatile_fid, + FILE_BASIC_INFO *buf); +extern int SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, + const u64 persistent_fid, const u64 volatile_fid, + const __u8 oplock_level); +extern int SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, + u64 persistent_file_id, u64 volatile_file_id, + struct kstatfs *FSData); +extern int SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, + const __u64 persist_fid, const __u64 volatile_fid, + const __u32 pid, const __u64 length, const __u64 offset, + const __u32 lockFlags, const bool wait); +extern int smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, + const __u64 persist_fid, const __u64 volatile_fid, + const __u32 pid, const __u32 num_lock, + struct smb2_lock_element *buf); +extern int SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, + __u8 *lease_key, const __le32 lease_state); #endif /* _SMB2PROTO_H */ diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c index 31f5d42..2a5fdf2 100644 --- a/fs/cifs/smb2transport.c +++ b/fs/cifs/smb2transport.c @@ -30,12 +30,156 @@ #include <linux/uaccess.h> #include <asm/processor.h> #include <linux/mempool.h> +#include <linux/highmem.h> #include "smb2pdu.h" #include "cifsglob.h" #include "cifsproto.h" #include "smb2proto.h" #include "cifs_debug.h" #include "smb2status.h" +#include "smb2glob.h" + +static int +smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) +{ + int i, rc; + unsigned char smb2_signature[SMB2_HMACSHA256_SIZE]; + unsigned char *sigptr = smb2_signature; + struct kvec *iov = rqst->rq_iov; + int n_vec = rqst->rq_nvec; + struct smb2_hdr *smb2_pdu = (struct smb2_hdr *)iov[0].iov_base; + + memset(smb2_signature, 0x0, SMB2_HMACSHA256_SIZE); + memset(smb2_pdu->Signature, 0x0, SMB2_SIGNATURE_SIZE); + + rc = crypto_shash_setkey(server->secmech.hmacsha256, + server->session_key.response, SMB2_NTLMV2_SESSKEY_SIZE); + if (rc) { + cERROR(1, "%s: Could not update with response\n", __func__); + return rc; + } + + rc = crypto_shash_init(&server->secmech.sdeschmacsha256->shash); + if (rc) { + cERROR(1, "%s: Could not init md5\n", __func__); + return rc; + } + + for (i = 0; i < n_vec; i++) { + if (iov[i].iov_len == 0) + continue; + if (iov[i].iov_base == NULL) { + cERROR(1, "null iovec entry"); + return -EIO; + } + /* + * The first entry includes a length field (which does not get + * signed that occupies the first 4 bytes before the header). + */ + if (i == 0) { + if (iov[0].iov_len <= 8) /* cmd field at offset 9 */ + break; /* nothing to sign or corrupt header */ + rc = + crypto_shash_update( + &server->secmech.sdeschmacsha256->shash, + iov[i].iov_base + 4, iov[i].iov_len - 4); + } else { + rc = + crypto_shash_update( + &server->secmech.sdeschmacsha256->shash, + iov[i].iov_base, iov[i].iov_len); + } + if (rc) { + cERROR(1, "%s: Could not update with payload\n", + __func__); + return rc; + } + } + + /* now hash over the rq_pages array */ + for (i = 0; i < rqst->rq_npages; i++) { + struct kvec p_iov; + + cifs_rqst_page_to_kvec(rqst, i, &p_iov); + crypto_shash_update(&server->secmech.sdeschmacsha256->shash, + p_iov.iov_base, p_iov.iov_len); + kunmap(rqst->rq_pages[i]); + } + + rc = crypto_shash_final(&server->secmech.sdeschmacsha256->shash, + sigptr); + if (rc) + cERROR(1, "%s: Could not generate sha256 hash\n", __func__); + + memcpy(smb2_pdu->Signature, sigptr, SMB2_SIGNATURE_SIZE); + + return rc; +} + +/* must be called with server->srv_mutex held */ +static int +smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server) +{ + int rc = 0; + struct smb2_hdr *smb2_pdu = rqst->rq_iov[0].iov_base; + + if (!(smb2_pdu->Flags & SMB2_FLAGS_SIGNED) || + server->tcpStatus == CifsNeedNegotiate) + return rc; + + if (!server->session_estab) { + strncpy(smb2_pdu->Signature, "BSRSPYL", 8); + return rc; + } + + rc = smb2_calc_signature(rqst, server); + + return rc; +} + +int +smb2_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) +{ + unsigned int rc; + char server_response_sig[16]; + struct smb2_hdr *smb2_pdu = (struct smb2_hdr *)rqst->rq_iov[0].iov_base; + + if ((smb2_pdu->Command == SMB2_NEGOTIATE) || + (smb2_pdu->Command == SMB2_OPLOCK_BREAK) || + (!server->session_estab)) + return 0; + + /* + * BB what if signatures are supposed to be on for session but + * server does not send one? BB + */ + + /* Do not need to verify session setups with signature "BSRSPYL " */ + if (memcmp(smb2_pdu->Signature, "BSRSPYL ", 8) == 0) + cFYI(1, "dummy signature received for smb command 0x%x", + smb2_pdu->Command); + + /* + * Save off the origiginal signature so we can modify the smb and check + * our calculated signature against what the server sent. + */ + memcpy(server_response_sig, smb2_pdu->Signature, SMB2_SIGNATURE_SIZE); + + memset(smb2_pdu->Signature, 0, SMB2_SIGNATURE_SIZE); + + mutex_lock(&server->srv_mutex); + rc = smb2_calc_signature(rqst, server); + mutex_unlock(&server->srv_mutex); + + if (rc) + return rc; + + if (memcmp(server_response_sig, smb2_pdu->Signature, + SMB2_SIGNATURE_SIZE)) + return -EACCES; + else + return 0; +} /* * Set message id for the request. Should be called after wait_for_free_request @@ -115,58 +259,66 @@ smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, bool log_error) { unsigned int len = get_rfc1002_length(mid->resp_buf); + struct kvec iov; + struct smb_rqst rqst = { .rq_iov = &iov, + .rq_nvec = 1 }; + + iov.iov_base = (char *)mid->resp_buf; + iov.iov_len = get_rfc1002_length(mid->resp_buf) + 4; dump_smb(mid->resp_buf, min_t(u32, 80, len)); /* convert the length into a more usable form */ - /* BB - uncomment with SMB2 signing implementation */ - /* if ((len > 24) && + if ((len > 24) && (server->sec_mode & (SECMODE_SIGN_REQUIRED|SECMODE_SIGN_ENABLED))) { - if (smb2_verify_signature(mid->resp_buf, server)) - cERROR(1, "Unexpected SMB signature"); - } */ + int rc; + + rc = smb2_verify_signature(&rqst, server); + if (rc) + cERROR(1, "SMB signature verification returned error = " + "%d", rc); + } return map_smb2_to_linux_error(mid->resp_buf, log_error); } -int -smb2_setup_request(struct cifs_ses *ses, struct kvec *iov, - unsigned int nvec, struct mid_q_entry **ret_mid) +struct mid_q_entry * +smb2_setup_request(struct cifs_ses *ses, struct smb_rqst *rqst) { int rc; - struct smb2_hdr *hdr = (struct smb2_hdr *)iov[0].iov_base; + struct smb2_hdr *hdr = (struct smb2_hdr *)rqst->rq_iov[0].iov_base; struct mid_q_entry *mid; smb2_seq_num_into_buf(ses->server, hdr); rc = smb2_get_mid_entry(ses, hdr, &mid); if (rc) - return rc; - /* rc = smb2_sign_smb2(iov, nvec, ses->server); - if (rc) - delete_mid(mid); */ - *ret_mid = mid; - return rc; + return ERR_PTR(rc); + rc = smb2_sign_rqst(rqst, ses->server); + if (rc) { + cifs_delete_mid(mid); + return ERR_PTR(rc); + } + return mid; } -int -smb2_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov, - unsigned int nvec, struct mid_q_entry **ret_mid) +struct mid_q_entry * +smb2_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst) { - int rc = 0; - struct smb2_hdr *hdr = (struct smb2_hdr *)iov[0].iov_base; + int rc; + struct smb2_hdr *hdr = (struct smb2_hdr *)rqst->rq_iov[0].iov_base; struct mid_q_entry *mid; smb2_seq_num_into_buf(server, hdr); mid = smb2_mid_entry_alloc(hdr, server); if (mid == NULL) - return -ENOMEM; + return ERR_PTR(-ENOMEM); - /* rc = smb2_sign_smb2(iov, nvec, server); + rc = smb2_sign_rqst(rqst, server); if (rc) { DeleteMidQEntry(mid); - return rc; - }*/ - *ret_mid = mid; - return rc; + return ERR_PTR(rc); + } + + return mid; } diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 83867ef..2126ab1 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -27,6 +27,8 @@ #include <linux/net.h> #include <linux/delay.h> #include <linux/freezer.h> +#include <linux/tcp.h> +#include <linux/highmem.h> #include <asm/uaccess.h> #include <asm/processor.h> #include <linux/mempool.h> @@ -109,8 +111,8 @@ DeleteMidQEntry(struct mid_q_entry *midEntry) mempool_free(midEntry, cifs_mid_poolp); } -static void -delete_mid(struct mid_q_entry *mid) +void +cifs_delete_mid(struct mid_q_entry *mid) { spin_lock(&GlobalMid_Lock); list_del(&mid->qhead); @@ -119,18 +121,29 @@ delete_mid(struct mid_q_entry *mid) DeleteMidQEntry(mid); } +/* + * smb_send_kvec - send an array of kvecs to the server + * @server: Server to send the data to + * @iov: Pointer to array of kvecs + * @n_vec: length of kvec array + * @sent: amount of data sent on socket is stored here + * + * Our basic "send data to server" function. Should be called with srv_mutex + * held. The caller is responsible for handling the results. + */ static int -smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec) +smb_send_kvec(struct TCP_Server_Info *server, struct kvec *iov, size_t n_vec, + size_t *sent) { int rc = 0; int i = 0; struct msghdr smb_msg; - unsigned int len = iov[0].iov_len; - unsigned int total_len; - int first_vec = 0; - unsigned int smb_buf_length = get_rfc1002_length(iov[0].iov_base); + unsigned int remaining; + size_t first_vec = 0; struct socket *ssocket = server->ssocket; + *sent = 0; + if (ssocket == NULL) return -ENOTSOCK; /* BB eventually add reconnect code here */ @@ -143,56 +156,60 @@ smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec) else smb_msg.msg_flags = MSG_NOSIGNAL; - total_len = 0; + remaining = 0; for (i = 0; i < n_vec; i++) - total_len += iov[i].iov_len; - - cFYI(1, "Sending smb: total_len %d", total_len); - dump_smb(iov[0].iov_base, len); + remaining += iov[i].iov_len; i = 0; - while (total_len) { + while (remaining) { + /* + * If blocking send, we try 3 times, since each can block + * for 5 seconds. For nonblocking we have to try more + * but wait increasing amounts of time allowing time for + * socket to clear. The overall time we wait in either + * case to send on the socket is about 15 seconds. + * Similarly we wait for 15 seconds for a response from + * the server in SendReceive[2] for the server to send + * a response back for most types of requests (except + * SMB Write past end of file which can be slow, and + * blocking lock operations). NFS waits slightly longer + * than CIFS, but this can make it take longer for + * nonresponsive servers to be detected and 15 seconds + * is more than enough time for modern networks to + * send a packet. In most cases if we fail to send + * after the retries we will kill the socket and + * reconnect which may clear the network problem. + */ rc = kernel_sendmsg(ssocket, &smb_msg, &iov[first_vec], - n_vec - first_vec, total_len); - if ((rc == -ENOSPC) || (rc == -EAGAIN)) { + n_vec - first_vec, remaining); + if (rc == -ENOSPC || rc == -EAGAIN) { i++; - /* - * If blocking send we try 3 times, since each can block - * for 5 seconds. For nonblocking we have to try more - * but wait increasing amounts of time allowing time for - * socket to clear. The overall time we wait in either - * case to send on the socket is about 15 seconds. - * Similarly we wait for 15 seconds for a response from - * the server in SendReceive[2] for the server to send - * a response back for most types of requests (except - * SMB Write past end of file which can be slow, and - * blocking lock operations). NFS waits slightly longer - * than CIFS, but this can make it take longer for - * nonresponsive servers to be detected and 15 seconds - * is more than enough time for modern networks to - * send a packet. In most cases if we fail to send - * after the retries we will kill the socket and - * reconnect which may clear the network problem. - */ - if ((i >= 14) || (!server->noblocksnd && (i > 2))) { - cERROR(1, "sends on sock %p stuck for 15 seconds", - ssocket); + if (i >= 14 || (!server->noblocksnd && (i > 2))) { + cERROR(1, "sends on sock %p stuck for 15 " + "seconds", ssocket); rc = -EAGAIN; break; } msleep(1 << i); continue; } + if (rc < 0) break; - if (rc == total_len) { - total_len = 0; + /* send was at least partially successful */ + *sent += rc; + + if (rc == remaining) { + remaining = 0; break; - } else if (rc > total_len) { - cERROR(1, "sent %d requested %d", rc, total_len); + } + + if (rc > remaining) { + cERROR(1, "sent %d requested %d", rc, remaining); break; } + if (rc == 0) { /* should never happen, letting socket clear before retrying is our only obvious option here */ @@ -200,7 +217,9 @@ smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec) msleep(500); continue; } - total_len -= rc; + + remaining -= rc; + /* the line below resets i */ for (i = first_vec; i < n_vec; i++) { if (iov[i].iov_len) { @@ -215,16 +234,97 @@ smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec) } } } + i = 0; /* in case we get ENOSPC on the next send */ + rc = 0; } + return rc; +} + +/** + * rqst_page_to_kvec - Turn a slot in the smb_rqst page array into a kvec + * @rqst: pointer to smb_rqst + * @idx: index into the array of the page + * @iov: pointer to struct kvec that will hold the result + * + * Helper function to convert a slot in the rqst->rq_pages array into a kvec. + * The page will be kmapped and the address placed into iov_base. The length + * will then be adjusted according to the ptailoff. + */ +void +cifs_rqst_page_to_kvec(struct smb_rqst *rqst, unsigned int idx, + struct kvec *iov) +{ + /* + * FIXME: We could avoid this kmap altogether if we used + * kernel_sendpage instead of kernel_sendmsg. That will only + * work if signing is disabled though as sendpage inlines the + * page directly into the fraglist. If userspace modifies the + * page after we calculate the signature, then the server will + * reject it and may break the connection. kernel_sendmsg does + * an extra copy of the data and avoids that issue. + */ + iov->iov_base = kmap(rqst->rq_pages[idx]); + + /* if last page, don't send beyond this offset into page */ + if (idx == (rqst->rq_npages - 1)) + iov->iov_len = rqst->rq_tailsz; + else + iov->iov_len = rqst->rq_pagesz; +} + +static int +smb_send_rqst(struct TCP_Server_Info *server, struct smb_rqst *rqst) +{ + int rc; + struct kvec *iov = rqst->rq_iov; + int n_vec = rqst->rq_nvec; + unsigned int smb_buf_length = get_rfc1002_length(iov[0].iov_base); + unsigned int i; + size_t total_len = 0, sent; + struct socket *ssocket = server->ssocket; + int val = 1; + + cFYI(1, "Sending smb: smb_len=%u", smb_buf_length); + dump_smb(iov[0].iov_base, iov[0].iov_len); + + /* cork the socket */ + kernel_setsockopt(ssocket, SOL_TCP, TCP_CORK, + (char *)&val, sizeof(val)); + + rc = smb_send_kvec(server, iov, n_vec, &sent); + if (rc < 0) + goto uncork; + + total_len += sent; + + /* now walk the page array and send each page in it */ + for (i = 0; i < rqst->rq_npages; i++) { + struct kvec p_iov; + + cifs_rqst_page_to_kvec(rqst, i, &p_iov); + rc = smb_send_kvec(server, &p_iov, 1, &sent); + kunmap(rqst->rq_pages[i]); + if (rc < 0) + break; + + total_len += sent; + } + +uncork: + /* uncork it */ + val = 0; + kernel_setsockopt(ssocket, SOL_TCP, TCP_CORK, + (char *)&val, sizeof(val)); if ((total_len > 0) && (total_len != smb_buf_length + 4)) { - cFYI(1, "partial send (%d remaining), terminating session", - total_len); - /* If we have only sent part of an SMB then the next SMB - could be taken as the remainder of this one. We need - to kill the socket so the server throws away the partial - SMB */ + cFYI(1, "partial send (wanted=%u sent=%zu): terminating " + "session", smb_buf_length + 4, total_len); + /* + * If we have only sent part of an SMB then the next SMB could + * be taken as the remainder of this one. We need to kill the + * socket so the server throws away the partial SMB + */ server->tcpStatus = CifsNeedReconnect; } @@ -236,6 +336,15 @@ smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec) return rc; } +static int +smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec) +{ + struct smb_rqst rqst = { .rq_iov = iov, + .rq_nvec = n_vec }; + + return smb_send_rqst(server, &rqst); +} + int smb_send(struct TCP_Server_Info *server, struct smb_hdr *smb_buffer, unsigned int smb_buf_length) @@ -345,12 +454,11 @@ wait_for_response(struct TCP_Server_Info *server, struct mid_q_entry *midQ) return 0; } -int -cifs_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov, - unsigned int nvec, struct mid_q_entry **ret_mid) +struct mid_q_entry * +cifs_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst) { int rc; - struct smb_hdr *hdr = (struct smb_hdr *)iov[0].iov_base; + struct smb_hdr *hdr = (struct smb_hdr *)rqst->rq_iov[0].iov_base; struct mid_q_entry *mid; /* enable signing if server requires it */ @@ -359,16 +467,15 @@ cifs_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov, mid = AllocMidQEntry(hdr, server); if (mid == NULL) - return -ENOMEM; + return ERR_PTR(-ENOMEM); - rc = cifs_sign_smbv(iov, nvec, server, &mid->sequence_number); + rc = cifs_sign_rqst(rqst, server, &mid->sequence_number); if (rc) { DeleteMidQEntry(mid); - return rc; + return ERR_PTR(rc); } - *ret_mid = mid; - return 0; + return mid; } /* @@ -376,9 +483,9 @@ cifs_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov, * the result. Caller is responsible for dealing with timeouts. */ int -cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov, - unsigned int nvec, mid_receive_t *receive, - mid_callback_t *callback, void *cbdata, const int flags) +cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst, + mid_receive_t *receive, mid_callback_t *callback, + void *cbdata, const int flags) { int rc, timeout, optype; struct mid_q_entry *mid; @@ -391,12 +498,12 @@ cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov, return rc; mutex_lock(&server->srv_mutex); - rc = server->ops->setup_async_request(server, iov, nvec, &mid); - if (rc) { + mid = server->ops->setup_async_request(server, rqst); + if (IS_ERR(mid)) { mutex_unlock(&server->srv_mutex); add_credits(server, 1, optype); wake_up(&server->request_q); - return rc; + return PTR_ERR(mid); } mid->receive = receive; @@ -411,7 +518,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov, cifs_in_send_inc(server); - rc = smb_sendv(server, iov, nvec); + rc = smb_send_rqst(server, rqst); cifs_in_send_dec(server); cifs_save_when_sent(mid); mutex_unlock(&server->srv_mutex); @@ -419,7 +526,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov, if (rc == 0) return 0; - delete_mid(mid); + cifs_delete_mid(mid); add_credits(server, 1, optype); wake_up(&server->request_q); return rc; @@ -503,35 +610,40 @@ cifs_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server, /* convert the length into a more usable form */ if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { struct kvec iov; + int rc = 0; + struct smb_rqst rqst = { .rq_iov = &iov, + .rq_nvec = 1 }; iov.iov_base = mid->resp_buf; iov.iov_len = len; /* FIXME: add code to kill session */ - if (cifs_verify_signature(&iov, 1, server, - mid->sequence_number + 1) != 0) - cERROR(1, "Unexpected SMB signature"); + rc = cifs_verify_signature(&rqst, server, + mid->sequence_number + 1); + if (rc) + cERROR(1, "SMB signature verification returned error = " + "%d", rc); } /* BB special case reconnect tid and uid here? */ return map_smb_to_linux_error(mid->resp_buf, log_error); } -int -cifs_setup_request(struct cifs_ses *ses, struct kvec *iov, - unsigned int nvec, struct mid_q_entry **ret_mid) +struct mid_q_entry * +cifs_setup_request(struct cifs_ses *ses, struct smb_rqst *rqst) { int rc; - struct smb_hdr *hdr = (struct smb_hdr *)iov[0].iov_base; + struct smb_hdr *hdr = (struct smb_hdr *)rqst->rq_iov[0].iov_base; struct mid_q_entry *mid; rc = allocate_mid(ses, hdr, &mid); if (rc) - return rc; - rc = cifs_sign_smbv(iov, nvec, ses->server, &mid->sequence_number); - if (rc) - delete_mid(mid); - *ret_mid = mid; - return rc; + return ERR_PTR(rc); + rc = cifs_sign_rqst(rqst, ses->server, &mid->sequence_number); + if (rc) { + cifs_delete_mid(mid); + return ERR_PTR(rc); + } + return mid; } int @@ -544,6 +656,8 @@ SendReceive2(const unsigned int xid, struct cifs_ses *ses, struct mid_q_entry *midQ; char *buf = iov[0].iov_base; unsigned int credits = 1; + struct smb_rqst rqst = { .rq_iov = iov, + .rq_nvec = n_vec }; timeout = flags & CIFS_TIMEOUT_MASK; optype = flags & CIFS_OP_MASK; @@ -581,13 +695,13 @@ SendReceive2(const unsigned int xid, struct cifs_ses *ses, mutex_lock(&ses->server->srv_mutex); - rc = ses->server->ops->setup_request(ses, iov, n_vec, &midQ); - if (rc) { + midQ = ses->server->ops->setup_request(ses, &rqst); + if (IS_ERR(midQ)) { mutex_unlock(&ses->server->srv_mutex); cifs_small_buf_release(buf); /* Update # of requests on wire to server */ add_credits(ses->server, 1, optype); - return rc; + return PTR_ERR(midQ); } midQ->mid_state = MID_REQUEST_SUBMITTED; @@ -649,11 +763,11 @@ SendReceive2(const unsigned int xid, struct cifs_ses *ses, rc = ses->server->ops->check_receive(midQ, ses->server, flags & CIFS_LOG_ERROR); - /* mark it so buf will not be freed by delete_mid */ + /* mark it so buf will not be freed by cifs_delete_mid */ if ((flags & CIFS_NO_RESP) == 0) midQ->resp_buf = NULL; out: - delete_mid(midQ); + cifs_delete_mid(midQ); add_credits(ses->server, credits, optype); return rc; @@ -759,7 +873,7 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses, memcpy(out_buf, midQ->resp_buf, *pbytes_returned + 4); rc = cifs_check_receive(midQ, ses->server, 0); out: - delete_mid(midQ); + cifs_delete_mid(midQ); add_credits(ses->server, 1, 0); return rc; @@ -843,7 +957,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number); if (rc) { - delete_mid(midQ); + cifs_delete_mid(midQ); mutex_unlock(&ses->server->srv_mutex); return rc; } @@ -856,7 +970,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, mutex_unlock(&ses->server->srv_mutex); if (rc < 0) { - delete_mid(midQ); + cifs_delete_mid(midQ); return rc; } @@ -877,7 +991,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, blocking lock to return. */ rc = send_cancel(ses->server, in_buf, midQ); if (rc) { - delete_mid(midQ); + cifs_delete_mid(midQ); return rc; } } else { @@ -889,7 +1003,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, /* If we get -ENOLCK back the lock may have already been removed. Don't exit in this case. */ if (rc && rc != -ENOLCK) { - delete_mid(midQ); + cifs_delete_mid(midQ); return rc; } } @@ -926,7 +1040,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon, memcpy(out_buf, midQ->resp_buf, *pbytes_returned + 4); rc = cifs_check_receive(midQ, ses->server, 0); out: - delete_mid(midQ); + cifs_delete_mid(midQ); if (rstart && rc == -EACCES) return -ERESTARTSYS; return rc; |
