diff options
Diffstat (limited to 'fs/nfsd/nfs4xdr.c')
| -rw-r--r-- | fs/nfsd/nfs4xdr.c | 2536 |
1 files changed, 2536 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c new file mode 100644 index 0000000..36a058a --- /dev/null +++ b/fs/nfsd/nfs4xdr.c @@ -0,0 +1,2536 @@ +/* + * fs/nfs/nfs4xdr.c + * + * Server-side XDR for NFSv4 + * + * Copyright (c) 2002 The Regents of the University of Michigan. + * All rights reserved. + * + * Kendrick Smith <kmsmith@umich.edu> + * Andy Adamson <andros@umich.edu> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * TODO: Neil Brown made the following observation: We currently + * initially reserve NFSD_BUFSIZE space on the transmit queue and + * never release any of that until the request is complete. + * It would be good to calculate a new maximum response size while + * decoding the COMPOUND, and call svc_reserve with this number + * at the end of nfs4svc_decode_compoundargs. + */ + +#include <linux/param.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/fs.h> +#include <linux/namei.h> +#include <linux/vfs.h> +#include <linux/sunrpc/xdr.h> +#include <linux/sunrpc/svc.h> +#include <linux/sunrpc/clnt.h> +#include <linux/nfsd/nfsd.h> +#include <linux/nfsd/state.h> +#include <linux/nfsd/xdr4.h> +#include <linux/nfsd_idmap.h> +#include <linux/nfs4.h> +#include <linux/nfs4_acl.h> + +#define NFSDDBG_FACILITY NFSDDBG_XDR + +static int +check_filename(char *str, int len, int err) +{ + int i; + + if (len == 0) + return nfserr_inval; + if (isdotent(str, len)) + return err; + for (i = 0; i < len; i++) + if (str[i] == '/') + return err; + return 0; +} + +/* + * START OF "GENERIC" DECODE ROUTINES. + * These may look a little ugly since they are imported from a "generic" + * set of XDR encode/decode routines which are intended to be shared by + * all of our NFSv4 implementations (OpenBSD, MacOS X...). + * + * If the pain of reading these is too great, it should be a straightforward + * task to translate them into Linux-specific versions which are more + * consistent with the style used in NFSv2/v3... + */ +#define DECODE_HEAD \ + u32 *p; \ + int status +#define DECODE_TAIL \ + status = 0; \ +out: \ + return status; \ +xdr_error: \ + printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ + status = nfserr_bad_xdr; \ + goto out + +#define READ32(x) (x) = ntohl(*p++) +#define READ64(x) do { \ + (x) = (u64)ntohl(*p++) << 32; \ + (x) |= ntohl(*p++); \ +} while (0) +#define READTIME(x) do { \ + p++; \ + (x) = ntohl(*p++); \ + p++; \ +} while (0) +#define READMEM(x,nbytes) do { \ + x = (char *)p; \ + p += XDR_QUADLEN(nbytes); \ +} while (0) +#define SAVEMEM(x,nbytes) do { \ + if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ + savemem(argp, p, nbytes) : \ + (char *)p)) { \ + printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ + goto xdr_error; \ + } \ + p += XDR_QUADLEN(nbytes); \ +} while (0) +#define COPYMEM(x,nbytes) do { \ + memcpy((x), p, nbytes); \ + p += XDR_QUADLEN(nbytes); \ +} while (0) + +/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ +#define READ_BUF(nbytes) do { \ + if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ + p = argp->p; \ + argp->p += XDR_QUADLEN(nbytes); \ + } else if (!(p = read_buf(argp, nbytes))) { \ + printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \ + goto xdr_error; \ + } \ +} while (0) + +u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes) +{ + /* We want more bytes than seem to be available. + * Maybe we need a new page, maybe we have just run out + */ + int avail = (char*)argp->end - (char*)argp->p; + u32 *p; + if (avail + argp->pagelen < nbytes) + return NULL; + if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ + return NULL; + /* ok, we can do it with the current plus the next page */ + if (nbytes <= sizeof(argp->tmp)) + p = argp->tmp; + else { + if (argp->tmpp) + kfree(argp->tmpp); + p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); + if (!p) + return NULL; + + } + memcpy(p, argp->p, avail); + /* step to next page */ + argp->p = page_address(argp->pagelist[0]); + argp->pagelist++; + if (argp->pagelen < PAGE_SIZE) { + argp->end = p + (argp->pagelen>>2); + argp->pagelen = 0; + } else { + argp->end = p + (PAGE_SIZE>>2); + argp->pagelen -= PAGE_SIZE; + } + memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); + argp->p += XDR_QUADLEN(nbytes - avail); + return p; +} + +static int +defer_free(struct nfsd4_compoundargs *argp, + void (*release)(const void *), void *p) +{ + struct tmpbuf *tb; + + tb = kmalloc(sizeof(*tb), GFP_KERNEL); + if (!tb) + return -ENOMEM; + tb->buf = p; + tb->release = release; + tb->next = argp->to_free; + argp->to_free = tb; + return 0; +} + +char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes) +{ + void *new = NULL; + if (p == argp->tmp) { + new = kmalloc(nbytes, GFP_KERNEL); + if (!new) return NULL; + p = new; + memcpy(p, argp->tmp, nbytes); + } else { + if (p != argp->tmpp) + BUG(); + argp->tmpp = NULL; + } + if (defer_free(argp, kfree, p)) { + kfree(new); + return NULL; + } else + return (char *)p; +} + + +static int +nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) +{ + u32 bmlen; + DECODE_HEAD; + + bmval[0] = 0; + bmval[1] = 0; + + READ_BUF(4); + READ32(bmlen); + if (bmlen > 1000) + goto xdr_error; + + READ_BUF(bmlen << 2); + if (bmlen > 0) + READ32(bmval[0]); + if (bmlen > 1) + READ32(bmval[1]); + + DECODE_TAIL; +} + +static int +nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, + struct nfs4_acl **acl) +{ + int expected_len, len = 0; + u32 dummy32; + char *buf; + + DECODE_HEAD; + iattr->ia_valid = 0; + if ((status = nfsd4_decode_bitmap(argp, bmval))) + return status; + + /* + * According to spec, unsupported attributes return ERR_NOTSUPP; + * read-only attributes return ERR_INVAL. + */ + if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) + return nfserr_attrnotsupp; + if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1)) + return nfserr_inval; + + READ_BUF(4); + READ32(expected_len); + + if (bmval[0] & FATTR4_WORD0_SIZE) { + READ_BUF(8); + len += 8; + READ64(iattr->ia_size); + iattr->ia_valid |= ATTR_SIZE; + } + if (bmval[0] & FATTR4_WORD0_ACL) { + int nace, i; + struct nfs4_ace ace; + + READ_BUF(4); len += 4; + READ32(nace); + + *acl = nfs4_acl_new(); + if (*acl == NULL) { + status = -ENOMEM; + goto out_nfserr; + } + defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl); + + for (i = 0; i < nace; i++) { + READ_BUF(16); len += 16; + READ32(ace.type); + READ32(ace.flag); + READ32(ace.access_mask); + READ32(dummy32); + READ_BUF(dummy32); + len += XDR_QUADLEN(dummy32) << 2; + READMEM(buf, dummy32); + ace.whotype = nfs4_acl_get_whotype(buf, dummy32); + status = 0; + if (ace.whotype != NFS4_ACL_WHO_NAMED) + ace.who = 0; + else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP) + status = nfsd_map_name_to_gid(argp->rqstp, + buf, dummy32, &ace.who); + else + status = nfsd_map_name_to_uid(argp->rqstp, + buf, dummy32, &ace.who); + if (status) + goto out_nfserr; + if (nfs4_acl_add_ace(*acl, ace.type, ace.flag, + ace.access_mask, ace.whotype, ace.who) != 0) { + status = -ENOMEM; + goto out_nfserr; + } + } + } else + *acl = NULL; + if (bmval[1] & FATTR4_WORD1_MODE) { + READ_BUF(4); + len += 4; + READ32(iattr->ia_mode); + iattr->ia_mode &= (S_IFMT | S_IALLUGO); + iattr->ia_valid |= ATTR_MODE; + } + if (bmval[1] & FATTR4_WORD1_OWNER) { + READ_BUF(4); + len += 4; + READ32(dummy32); + READ_BUF(dummy32); + len += (XDR_QUADLEN(dummy32) << 2); + READMEM(buf, dummy32); + if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) + goto out_nfserr; + iattr->ia_valid |= ATTR_UID; + } + if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { + READ_BUF(4); + len += 4; + READ32(dummy32); + READ_BUF(dummy32); + len += (XDR_QUADLEN(dummy32) << 2); + READMEM(buf, dummy32); + if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) + goto out_nfserr; + iattr->ia_valid |= ATTR_GID; + } + if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { + READ_BUF(4); + len += 4; + READ32(dummy32); + switch (dummy32) { + case NFS4_SET_TO_CLIENT_TIME: + /* We require the high 32 bits of 'seconds' to be 0, and we ignore + all 32 bits of 'nseconds'. */ + READ_BUF(12); + len += 12; + READ32(dummy32); + if (dummy32) + return nfserr_inval; + READ32(iattr->ia_atime.tv_sec); + READ32(iattr->ia_atime.tv_nsec); + if (iattr->ia_atime.tv_nsec >= (u32)1000000000) + return nfserr_inval; + iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); + break; + case NFS4_SET_TO_SERVER_TIME: + iattr->ia_valid |= ATTR_ATIME; + break; + default: + goto xdr_error; + } + } + if (bmval[1] & FATTR4_WORD1_TIME_METADATA) { + /* We require the high 32 bits of 'seconds' to be 0, and we ignore + all 32 bits of 'nseconds'. */ + READ_BUF(12); + len += 12; + READ32(dummy32); + if (dummy32) + return nfserr_inval; + READ32(iattr->ia_ctime.tv_sec); + READ32(iattr->ia_ctime.tv_nsec); + if (iattr->ia_ctime.tv_nsec >= (u32)1000000000) + return nfserr_inval; + iattr->ia_valid |= ATTR_CTIME; + } + if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { + READ_BUF(4); + len += 4; + READ32(dummy32); + switch (dummy32) { + case NFS4_SET_TO_CLIENT_TIME: + /* We require the high 32 bits of 'seconds' to be 0, and we ignore + all 32 bits of 'nseconds'. */ + READ_BUF(12); + len += 12; + READ32(dummy32); + if (dummy32) + return nfserr_inval; + READ32(iattr->ia_mtime.tv_sec); + READ32(iattr->ia_mtime.tv_nsec); + if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) + return nfserr_inval; + iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); + break; + case NFS4_SET_TO_SERVER_TIME: + iattr->ia_valid |= ATTR_MTIME; + break; + default: + goto xdr_error; + } + } + if (len != expected_len) + goto xdr_error; + + DECODE_TAIL; + +out_nfserr: + status = nfserrno(status); + goto out; +} + +static int +nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) +{ + DECODE_HEAD; + + READ_BUF(4); + READ32(access->ac_req_access); + + DECODE_TAIL; +} + +static int +nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) +{ + DECODE_HEAD; + + close->cl_stateowner = NULL; + READ_BUF(4 + sizeof(stateid_t)); + READ32(close->cl_seqid); + READ32(close->cl_stateid.si_generation); + COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); + + DECODE_TAIL; +} + + +static int +nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) +{ + DECODE_HEAD; + + READ_BUF(12); + READ64(commit->co_offset); + READ32(commit->co_count); + + DECODE_TAIL; +} + +static int +nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) +{ + DECODE_HEAD; + + READ_BUF(4); + READ32(create->cr_type); + switch (create->cr_type) { + case NF4LNK: + READ_BUF(4); + READ32(create->cr_linklen); + READ_BUF(create->cr_linklen); + SAVEMEM(create->cr_linkname, create->cr_linklen); + break; + case NF4BLK: + case NF4CHR: + READ_BUF(8); + READ32(create->cr_specdata1); + READ32(create->cr_specdata2); + break; + case NF4SOCK: + case NF4FIFO: + case NF4DIR: + default: + break; + } + + READ_BUF(4); + READ32(create->cr_namelen); + READ_BUF(create->cr_namelen); + SAVEMEM(create->cr_name, create->cr_namelen); + if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) + return status; + + if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl))) + goto out; + + DECODE_TAIL; +} + +static inline int +nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) +{ + DECODE_HEAD; + + READ_BUF(sizeof(stateid_t)); + READ32(dr->dr_stateid.si_generation); + COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t)); + + DECODE_TAIL; +} + +static inline int +nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) +{ + return nfsd4_decode_bitmap(argp, getattr->ga_bmval); +} + +static int +nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) +{ + DECODE_HEAD; + + READ_BUF(4); + READ32(link->li_namelen); + READ_BUF(link->li_namelen); + SAVEMEM(link->li_name, link->li_namelen); + if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) + return status; + + DECODE_TAIL; +} + +static int +nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) +{ + DECODE_HEAD; + + lock->lk_stateowner = NULL; + /* + * type, reclaim(boolean), offset, length, new_lock_owner(boolean) + */ + READ_BUF(28); + READ32(lock->lk_type); + if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) + goto xdr_error; + READ32(lock->lk_reclaim); + READ64(lock->lk_offset); + READ64(lock->lk_length); + READ32(lock->lk_is_new); + + if (lock->lk_is_new) { + READ_BUF(36); + READ32(lock->lk_new_open_seqid); + READ32(lock->lk_new_open_stateid.si_generation); + + COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t)); + READ32(lock->lk_new_lock_seqid); + COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); + READ32(lock->lk_new_owner.len); + READ_BUF(lock->lk_new_owner.len); + READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); + } else { + READ_BUF(20); + READ32(lock->lk_old_lock_stateid.si_generation); + COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t)); + READ32(lock->lk_old_lock_seqid); + } + + DECODE_TAIL; +} + +static int +nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) +{ + DECODE_HEAD; + + READ_BUF(32); + READ32(lockt->lt_type); + if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) + goto xdr_error; + READ64(lockt->lt_offset); + READ64(lockt->lt_length); + COPYMEM(&lockt->lt_clientid, 8); + READ32(lockt->lt_owner.len); + READ_BUF(lockt->lt_owner.len); + READMEM(lockt->lt_owner.data, lockt->lt_owner.len); + + DECODE_TAIL; +} + +static int +nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) +{ + DECODE_HEAD; + + locku->lu_stateowner = NULL; + READ_BUF(24 + sizeof(stateid_t)); + READ32(locku->lu_type); + if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) + goto xdr_error; + READ32(locku->lu_seqid); + READ32(locku->lu_stateid.si_generation); + COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); + READ64(locku->lu_offset); + READ64(locku->lu_length); + + DECODE_TAIL; +} + +static int +nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) +{ + DECODE_HEAD; + + READ_BUF(4); + READ32(lookup->lo_len); + READ_BUF(lookup->lo_len); + SAVEMEM(lookup->lo_name, lookup->lo_len); + if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) + return status; + + DECODE_TAIL; +} + +static int +nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) +{ + DECODE_HEAD; + + memset(open->op_bmval, 0, sizeof(open->op_bmval)); + open->op_iattr.ia_valid = 0; + open->op_stateowner = NULL; + + /* seqid, share_access, share_deny, clientid, ownerlen */ + READ_BUF(16 + sizeof(clientid_t)); + READ32(open->op_seqid); + READ32(open->op_share_access); + READ32(open->op_share_deny); + COPYMEM(&open->op_clientid, sizeof(clientid_t)); + READ32(open->op_owner.len); + + /* owner, open_flag */ + READ_BUF(open->op_owner.len + 4); + SAVEMEM(open->op_owner.data, open->op_owner.len); + READ32(open->op_create); + switch (open->op_create) { + case NFS4_OPEN_NOCREATE: + break; + case NFS4_OPEN_CREATE: + READ_BUF(4); + READ32(open->op_createmode); + switch (open->op_createmode) { + case NFS4_CREATE_UNCHECKED: + case NFS4_CREATE_GUARDED: + if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl))) + goto out; + break; + case NFS4_CREATE_EXCLUSIVE: + READ_BUF(8); + COPYMEM(open->op_verf.data, 8); + break; + default: + goto xdr_error; + } + break; + default: + goto xdr_error; + } + + /* open_claim */ + READ_BUF(4); + READ32(open->op_claim_type); + switch (open->op_claim_type) { + case NFS4_OPEN_CLAIM_NULL: + case NFS4_OPEN_CLAIM_DELEGATE_PREV: + READ_BUF(4); + READ32(open->op_fname.len); + READ_BUF(open->op_fname.len); + SAVEMEM(open->op_fname.data, open->op_fname.len); + if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) + return status; + break; + case NFS4_OPEN_CLAIM_PREVIOUS: + READ_BUF(4); + READ32(open->op_delegate_type); + break; + case NFS4_OPEN_CLAIM_DELEGATE_CUR: + READ_BUF(sizeof(stateid_t) + 4); + COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t)); + READ32(open->op_fname.len); + READ_BUF(open->op_fname.len); + SAVEMEM(open->op_fname.data, open->op_fname.len); + if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) + return status; + break; + default: + goto xdr_error; + } + + DECODE_TAIL; +} + +static int +nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) +{ + DECODE_HEAD; + + open_conf->oc_stateowner = NULL; + READ_BUF(4 + sizeof(stateid_t)); + READ32(open_conf->oc_req_stateid.si_generation); + COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t)); + READ32(open_conf->oc_seqid); + + DECODE_TAIL; +} + +static int +nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) +{ + DECODE_HEAD; + + open_down->od_stateowner = NULL; + READ_BUF(12 + sizeof(stateid_t)); + READ32(open_down->od_stateid.si_generation); + COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t)); + READ32(open_down->od_seqid); + READ32(open_down->od_share_access); + READ32(open_down->od_share_deny); + + DECODE_TAIL; +} + +static int +nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) +{ + DECODE_HEAD; + + READ_BUF(4); + READ32(putfh->pf_fhlen); + if (putfh->pf_fhlen > NFS4_FHSIZE) + goto xdr_error; + READ_BUF(putfh->pf_fhlen); + SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); + + DECODE_TAIL; +} + +static int +nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) +{ + DECODE_HEAD; + + READ_BUF(sizeof(stateid_t) + 12); + READ32(read->rd_stateid.si_generation); + COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t)); + READ64(read->rd_offset); + READ32(read->rd_length); + + DECODE_TAIL; +} + +static int +nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) +{ + DECODE_HEAD; + + READ_BUF(24); + READ64(readdir->rd_cookie); + COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); + READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ + READ32(readdir->rd_maxcount); + if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) + goto out; + + DECODE_TAIL; +} + +static int +nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) +{ + DECODE_HEAD; + + READ_BUF(4); + READ32(remove->rm_namelen); + READ_BUF(remove->rm_namelen); + SAVEMEM(remove->rm_name, remove->rm_namelen); + if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) + return status; + + DECODE_TAIL; +} + +static int +nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) +{ + DECODE_HEAD; + + READ_BUF(4); + READ32(rename->rn_snamelen); + READ_BUF(rename->rn_snamelen + 4); + SAVEMEM(rename->rn_sname, rename->rn_snamelen); + READ32(rename->rn_tnamelen); + READ_BUF(rename->rn_tnamelen); + SAVEMEM(rename->rn_tname, rename->rn_tnamelen); + if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) + return status; + if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) + return status; + + DECODE_TAIL; +} + +static int +nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) +{ + DECODE_HEAD; + + READ_BUF(sizeof(clientid_t)); + COPYMEM(clientid, sizeof(clientid_t)); + + DECODE_TAIL; +} + +static int +nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) +{ + DECODE_HEAD; + + READ_BUF(sizeof(stateid_t)); + READ32(setattr->sa_stateid.si_generation); + COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t)); + if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl))) + goto out; + + DECODE_TAIL; +} + +static int +nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) +{ + DECODE_HEAD; + + READ_BUF(12); + COPYMEM(setclientid->se_verf.data, 8); + READ32(setclientid->se_namelen); + + READ_BUF(setclientid->se_namelen + 8); + SAVEMEM(setclientid->se_name, setclientid->se_namelen); + READ32(setclientid->se_callback_prog); + READ32(setclientid->se_callback_netid_len); + + READ_BUF(setclientid->se_callback_netid_len + 4); + SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); + READ32(setclientid->se_callback_addr_len); + + READ_BUF(setclientid->se_callback_addr_len + 4); + SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); + READ32(setclientid->se_callback_ident); + + DECODE_TAIL; +} + +static int +nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) +{ + DECODE_HEAD; + + READ_BUF(8 + sizeof(nfs4_verifier)); + COPYMEM(&scd_c->sc_clientid, 8); + COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); + + DECODE_TAIL; +} + +/* Also used for NVERIFY */ +static int +nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) +{ +#if 0 + struct nfsd4_compoundargs save = { + .p = argp->p, + .end = argp->end, + .rqstp = argp->rqstp, + }; + u32 ve_bmval[2]; + struct iattr ve_iattr; /* request */ + struct nfs4_acl *ve_acl; /* request */ +#endif + DECODE_HEAD; + + if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) + goto out; + + /* For convenience's sake, we compare raw xdr'd attributes in + * nfsd4_proc_verify; however we still decode here just to return + * correct error in case of bad xdr. */ +#if 0 + status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); + if (status == nfserr_inval) { + status = nfserrno(status); + goto out; + } +#endif + READ_BUF(4); + READ32(verify->ve_attrlen); + READ_BUF(verify->ve_attrlen); + SAVEMEM(verify->ve_attrval, verify->ve_attrlen); + + DECODE_TAIL; +} + +static int +nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) +{ + int avail; + int v; + int len; + DECODE_HEAD; + + READ_BUF(sizeof(stateid_opaque_t) + 20); + READ32(write->wr_stateid.si_generation); + COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t)); + READ64(write->wr_offset); + READ32(write->wr_stable_how); + if (write->wr_stable_how > 2) + goto xdr_error; + READ32(write->wr_buflen); + + /* Sorry .. no magic macros for this.. * + * READ_BUF(write->wr_buflen); + * SAVEMEM(write->wr_buf, write->wr_buflen); + */ + avail = (char*)argp->end - (char*)argp->p; + if (avail + argp->pagelen < write->wr_buflen) { + printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); + goto xdr_error; + } + write->wr_vec[0].iov_base = p; + write->wr_vec[0].iov_len = avail; + v = 0; + len = write->wr_buflen; + while (len > write->wr_vec[v].iov_len) { + len -= write->wr_vec[v].iov_len; + v++; + write->wr_vec[v].iov_base = page_address(argp->pagelist[0]); + argp->pagelist++; + if (argp->pagelen >= PAGE_SIZE) { + write->wr_vec[v].iov_len = PAGE_SIZE; + argp->pagelen -= PAGE_SIZE; + } else { + write->wr_vec[v].iov_len = argp->pagelen; + argp->pagelen -= len; + } + } + argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len); + argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); + write->wr_vec[v].iov_len = len; + write->wr_vlen = v+1; + + DECODE_TAIL; +} + +static int +nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) +{ + DECODE_HEAD; + + READ_BUF(12); + COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); + READ32(rlockowner->rl_owner.len); + READ_BUF(rlockowner->rl_owner.len); + READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); + + DECODE_TAIL; +} + +static int +nfsd4_decode_compound(struct nfsd4_compoundargs *argp) +{ + DECODE_HEAD; + struct nfsd4_op *op; + int i; + + /* + * XXX: According to spec, we should check the tag + * for UTF-8 compliance. I'm postponing this for + * now because it seems that some clients do use + * binary tags. + */ + READ_BUF(4); + READ32(argp->taglen); + READ_BUF(argp->taglen + 8); + SAVEMEM(argp->tag, argp->taglen); + READ32(argp->minorversion); + READ32(argp->opcnt); + + if (argp->taglen > NFSD4_MAX_TAGLEN) + goto xdr_error; + if (argp->opcnt > 100) + goto xdr_error; + + if (argp->opcnt > sizeof(argp->iops)/sizeof(argp->iops[0])) { + argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); + if (!argp->ops) { + argp->ops = argp->iops; + printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n"); + goto xdr_error; + } + } + + for (i = 0; i < argp->opcnt; i++) { + op = &argp->ops[i]; + op->replay = NULL; + + /* + * We can't use READ_BUF() here because we need to handle + * a missing opcode as an OP_WRITE + 1. So we need to check + * to see if we're truly at the end of our buffer or if there + * is another page we need to flip to. + */ + + if (argp->p == argp->end) { + if (argp->pagelen < 4) { + /* There isn't an opcode still on the wire */ + op->opnum = OP_WRITE + 1; + op->status = nfserr_bad_xdr; + argp->opcnt = i+1; + break; + } + + /* + * False alarm. We just hit a page boundary, but there + * is still data available. Move pointer across page + * boundary. *snip from READ_BUF* + */ + argp->p = page_address(argp->pagelist[0]); + argp->pagelist++; + if (argp->pagelen < PAGE_SIZE) { + argp->end = p + (argp->pagelen>>2); + argp->pagelen = 0; + } else { + argp->end = p + (PAGE_SIZE>>2); + argp->pagelen -= PAGE_SIZE; + } + } + op->opnum = ntohl(*argp->p++); + + switch (op->opnum) { + case 2: /* Reserved operation */ + op->opnum = OP_ILLEGAL; + if (argp->minorversion == 0) + op->status = nfserr_op_illegal; + else + op->status = nfserr_minor_vers_mismatch; + break; + case OP_ACCESS: + op->status = nfsd4_decode_access(argp, &op->u.access); + break; + case OP_CLOSE: + op->status = nfsd4_decode_close(argp, &op->u.close); + break; + case OP_COMMIT: + op->status = nfsd4_decode_commit(argp, &op->u.commit); + break; + case OP_CREATE: + op->status = nfsd4_decode_create(argp, &op->u.create); + break; + case OP_DELEGRETURN: + op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn); + break; + case OP_GETATTR: + op->status = nfsd4_decode_getattr(argp, &op->u.getattr); + break; + case OP_GETFH: + op->status = nfs_ok; + break; + case OP_LINK: + op->status = nfsd4_decode_link(argp, &op->u.link); + break; + case OP_LOCK: + op->status = nfsd4_decode_lock(argp, &op->u.lock); + break; + case OP_LOCKT: + op->status = nfsd4_decode_lockt(argp, &op->u.lockt); + break; + case OP_LOCKU: + op->status = nfsd4_decode_locku(argp, &op->u.locku); + break; + case OP_LOOKUP: + op->status = nfsd4_decode_lookup(argp, &op->u.lookup); + break; + case OP_LOOKUPP: + op->status = nfs_ok; + break; + case OP_NVERIFY: + op->status = nfsd4_decode_verify(argp, &op->u.nverify); + break; + case OP_OPEN: + op->status = nfsd4_decode_open(argp, &op->u.open); + break; + case OP_OPEN_CONFIRM: + op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm); + break; + case OP_OPEN_DOWNGRADE: + op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade); + break; + case OP_PUTFH: + op->status = nfsd4_decode_putfh(argp, &op->u.putfh); + break; + case OP_PUTROOTFH: + op->status = nfs_ok; + break; + case OP_READ: + op->status = nfsd4_decode_read(argp, &op->u.read); + break; + case OP_READDIR: + op->status = nfsd4_decode_readdir(argp, &op->u.readdir); + break; + case OP_READLINK: + op->status = nfs_ok; + break; + case OP_REMOVE: + op->status = nfsd4_decode_remove(argp, &op->u.remove); + break; + case OP_RENAME: + op->status = nfsd4_decode_rename(argp, &op->u.rename); + break; + case OP_RESTOREFH: + op->status = nfs_ok; + break; + case OP_RENEW: + op->status = nfsd4_decode_renew(argp, &op->u.renew); + break; + case OP_SAVEFH: + op->status = nfs_ok; + break; + case OP_SETATTR: + op->status = nfsd4_decode_setattr(argp, &op->u.setattr); + break; + case OP_SETCLIENTID: + op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid); + break; + case OP_SETCLIENTID_CONFIRM: + op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm); + break; + case OP_VERIFY: + op->status = nfsd4_decode_verify(argp, &op->u.verify); + break; + case OP_WRITE: + op->status = nfsd4_decode_write(argp, &op->u.write); + break; + case OP_RELEASE_LOCKOWNER: + op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner); + break; + default: + op->opnum = OP_ILLEGAL; + op->status = nfserr_op_illegal; + break; + } + + if (op->status) { + argp->opcnt = i+1; + break; + } + } + + DECODE_TAIL; +} +/* + * END OF "GENERIC" DECODE ROUTINES. + */ + +/* + * START OF "GENERIC" ENCODE ROUTINES. + * These may look a little ugly since they are imported from a "generic" + * set of XDR encode/decode routines which are intended to be shared by + * all of our NFSv4 implementations (OpenBSD, MacOS X...). + * + * If the pain of reading these is too great, it should be a straightforward + * task to translate them into Linux-specific versions which are more + * consistent with the style used in NFSv2/v3... + */ +#define ENCODE_HEAD u32 *p + +#define WRITE32(n) *p++ = htonl(n) +#define WRITE64(n) do { \ + *p++ = htonl((u32)((n) >> 32)); \ + *p++ = htonl((u32)(n)); \ +} while (0) +#define WRITEMEM(ptr,nbytes) do { \ + *(p + XDR_QUADLEN(nbytes) -1) = 0; \ + memcpy(p, ptr, nbytes); \ + p += XDR_QUADLEN(nbytes); \ +} while (0) +#define WRITECINFO(c) do { \ + *p++ = htonl(c.atomic); \ + *p++ = htonl(c.before_ctime_sec); \ + *p++ = htonl(c.before_ctime_nsec); \ + *p++ = htonl(c.after_ctime_sec); \ + *p++ = htonl(c.after_ctime_nsec); \ +} while (0) + +#define RESERVE_SPACE(nbytes) do { \ + p = resp->p; \ + BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ +} while (0) +#define ADJUST_ARGS() resp->p = p + +/* + * Header routine to setup seqid operation replay cache + */ +#define ENCODE_SEQID_OP_HEAD \ + u32 *p; \ + u32 *save; \ + \ + save = resp->p; + +/* + * Routine for encoding the result of a + * "seqid-mutating" NFSv4 operation. This is + * where seqids are incremented, and the + * replay cache is filled. + */ + +#define ENCODE_SEQID_OP_TAIL(stateowner) do { \ + if (seqid_mutating_err(nfserr) && stateowner) { \ + if (stateowner->so_confirmed) \ + stateowner->so_seqid++; \ + stateowner->so_replay.rp_status = nfserr; \ + stateowner->so_replay.rp_buflen = \ + (((char *)(resp)->p - (char *)save)); \ + memcpy(stateowner->so_replay.rp_buf, save, \ + stateowner->so_replay.rp_buflen); \ + } } while (0); + + +static u32 nfs4_ftypes[16] = { + NF4BAD, NF4FIFO, NF4CHR, NF4BAD, + NF4DIR, NF4BAD, NF4BLK, NF4BAD, + NF4REG, NF4BAD, NF4LNK, NF4BAD, + NF4SOCK, NF4BAD, NF4LNK, NF4BAD, +}; + +static int +nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, + u32 **p, int *buflen) +{ + int status; + + if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) + return nfserr_resource; + if (whotype != NFS4_ACL_WHO_NAMED) + status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); + else if (group) + status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); + else + status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); + if (status < 0) + return nfserrno(status); + *p = xdr_encode_opaque(*p, NULL, status); + *buflen -= (XDR_QUADLEN(status) << 2) + 4; + BUG_ON(*buflen < 0); + return 0; +} + +static inline int +nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen) +{ + return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); +} + +static inline int +nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen) +{ + return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); +} + +static inline int +nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, + u32 **p, int *buflen) +{ + return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); +} + + +/* + * Note: @fhp can be NULL; in this case, we might have to compose the filehandle + * ourselves. + * + * @countp is the buffer size in _words_; upon successful return this becomes + * replaced with the number of words written. + */ +int +nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, + struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval, + struct svc_rqst *rqstp) +{ + u32 bmval0 = bmval[0]; + u32 bmval1 = bmval[1]; + struct kstat stat; + struct svc_fh tempfh; + struct kstatfs statfs; + int buflen = *countp << 2; + u32 *attrlenp; + u32 dummy; + u64 dummy64; + u32 *p = buffer; + int status; + int aclsupport = 0; + struct nfs4_acl *acl = NULL; + + BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); + BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0); + BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1); + + status = vfs_getattr(exp->ex_mnt, dentry, &stat); + if (status) + goto out_nfserr; + if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) || + (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | + FATTR4_WORD1_SPACE_TOTAL))) { + status = vfs_statfs(dentry->d_inode->i_sb, &statfs); + if (status) + goto out_nfserr; + } + if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { + fh_init(&tempfh, NFS4_FHSIZE); + status = fh_compose(&tempfh, exp, dentry, NULL); + if (status) + goto out; + fhp = &tempfh; + } + if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT + | FATTR4_WORD0_SUPPORTED_ATTRS)) { + status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); + aclsupport = (status == 0); + if (bmval0 & FATTR4_WORD0_ACL) { + if (status == -EOPNOTSUPP) + bmval0 &= ~FATTR4_WORD0_ACL; + else if (status == -EINVAL) { + status = nfserr_attrnotsupp; + goto out; + } else if (status != 0) + goto out_nfserr; + } + } + if ((buflen -= 16) < 0) + goto out_resource; + + WRITE32(2); + WRITE32(bmval0); + WRITE32(bmval1); + attrlenp = p++; /* to be backfilled later */ + + if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { + if ((buflen -= 12) < 0) + goto out_resource; + WRITE32(2); + WRITE32(aclsupport ? + NFSD_SUPPORTED_ATTRS_WORD0 : + NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL); + WRITE32(NFSD_SUPPORTED_ATTRS_WORD1); + } + if (bmval0 & FATTR4_WORD0_TYPE) { + if ((buflen -= 4) < 0) + goto out_resource; + dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; + if (dummy == NF4BAD) + goto out_serverfault; + WRITE32(dummy); + } + if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32( NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME ); + } + if (bmval0 & FATTR4_WORD0_CHANGE) { + /* + * Note: This _must_ be consistent with the scheme for writing + * change_info, so any changes made here must be reflected there + * as well. (See xdr4.h:set_change_info() and the WRITECINFO() + * macro above.) + */ + if ((buflen -= 8) < 0) + goto out_resource; + WRITE32(stat.ctime.tv_sec); + WRITE32(stat.ctime.tv_nsec); + } + if (bmval0 & FATTR4_WORD0_SIZE) { + if ((buflen -= 8) < 0) + goto out_resource; + WRITE64(stat.size); + } + if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(1); + } + if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(1); + } + if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(0); + } + if (bmval0 & FATTR4_WORD0_FSID) { + if ((buflen -= 16) < 0) + goto out_resource; + if (is_fsid(fhp, rqstp->rq_reffh)) { + WRITE64((u64)exp->ex_fsid); + WRITE64((u64)0); + } else { + WRITE32(0); + WRITE32(MAJOR(stat.dev)); + WRITE32(0); + WRITE32(MINOR(stat.dev)); + } + } + if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(0); + } + if (bmval0 & FATTR4_WORD0_LEASE_TIME) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(NFSD_LEASE_TIME); + } + if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(0); + } + if (bmval0 & FATTR4_WORD0_ACL) { + struct nfs4_ace *ace; + struct list_head *h; + + if (acl == NULL) { + if ((buflen -= 4) < 0) + goto out_resource; + + WRITE32(0); + goto out_acl; + } + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(acl->naces); + + list_for_each(h, &acl->ace_head) { + ace = list_entry(h, struct nfs4_ace, l_ace); + + if ((buflen -= 4*3) < 0) + goto out_resource; + WRITE32(ace->type); + WRITE32(ace->flag); + WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); + status = nfsd4_encode_aclname(rqstp, ace->whotype, + ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, + &p, &buflen); + if (status == nfserr_resource) + goto out_resource; + if (status) + goto out; + } + } +out_acl: + if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(aclsupport ? + ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); + } + if (bmval0 & FATTR4_WORD0_CANSETTIME) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(1); + } + if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(1); + } + if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(1); + } + if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(1); + } + if (bmval0 & FATTR4_WORD0_FILEHANDLE) { + buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; + if (buflen < 0) + goto out_resource; + WRITE32(fhp->fh_handle.fh_size); + WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); + } + if (bmval0 & FATTR4_WORD0_FILEID) { + if ((buflen -= 8) < 0) + goto out_resource; + WRITE64((u64) stat.ino); + } + if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { + if ((buflen -= 8) < 0) + goto out_resource; + WRITE64((u64) statfs.f_ffree); + } + if (bmval0 & FATTR4_WORD0_FILES_FREE) { + if ((buflen -= 8) < 0) + goto out_resource; + WRITE64((u64) statfs.f_ffree); + } + if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { + if ((buflen -= 8) < 0) + goto out_resource; + WRITE64((u64) statfs.f_files); + } + if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(1); + } + if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { + if ((buflen -= 8) < 0) + goto out_resource; + WRITE64(~(u64)0); + } + if (bmval0 & FATTR4_WORD0_MAXLINK) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(255); + } + if (bmval0 & FATTR4_WORD0_MAXNAME) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(~(u32) 0); + } + if (bmval0 & FATTR4_WORD0_MAXREAD) { + if ((buflen -= 8) < 0) + goto out_resource; + WRITE64((u64) NFSSVC_MAXBLKSIZE); + } + if (bmval0 & FATTR4_WORD0_MAXWRITE) { + if ((buflen -= 8) < 0) + goto out_resource; + WRITE64((u64) NFSSVC_MAXBLKSIZE); + } + if (bmval1 & FATTR4_WORD1_MODE) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(stat.mode & S_IALLUGO); + } + if (bmval1 & FATTR4_WORD1_NO_TRUNC) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(1); + } + if (bmval1 & FATTR4_WORD1_NUMLINKS) { + if ((buflen -= 4) < 0) + goto out_resource; + WRITE32(stat.nlink); + } + if (bmval1 & FATTR4_WORD1_OWNER) { + status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); + if (status == nfserr_resource) + goto out_resource; + if (status) + goto out; + } + if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { + status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); + if (status == nfserr_resource) + goto out_resource; + if (status) + goto out; + } + if (bmval1 & FATTR4_WORD1_RAWDEV) { + if ((buflen -= 8) < 0) + goto out_resource; + WRITE32((u32) MAJOR(stat.rdev)); + WRITE32((u32) MINOR(stat.rdev)); + } + if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { + if ((buflen -= 8) < 0) + goto out_resource; + dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; + WRITE64(dummy64); + } + if (bmval1 & FATTR4_WORD1_SPACE_FREE) { + if ((buflen -= 8) < 0) + goto out_resource; + dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; + WRITE64(dummy64); + } + if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { + if ((buflen -= 8) < 0) + goto out_resource; + dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; + WRITE64(dummy64); + } + if (bmval1 & FATTR4_WORD1_SPACE_USED) { + if ((buflen -= 8) < 0) + goto out_resource; + dummy64 = (u64)stat.blocks << 9; + WRITE64(dummy64); + } + if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { + if ((buflen -= 12) < 0) + goto out_resource; + WRITE32(0); + WRITE32(stat.atime.tv_sec); + WRITE32(stat.atime.tv_nsec); + } + if (bmval1 & FATTR4_WORD1_TIME_DELTA) { + if ((buflen -= 12) < 0) + goto out_resource; + WRITE32(0); + WRITE32(1); + WRITE32(0); + } + if (bmval1 & FATTR4_WORD1_TIME_METADATA) { + if ((buflen -= 12) < 0) + goto out_resource; + WRITE32(0); + WRITE32(stat.ctime.tv_sec); + WRITE32(stat.ctime.tv_nsec); + } + if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { + if ((buflen -= 12) < 0) + goto out_resource; + WRITE32(0); + WRITE32(stat.mtime.tv_sec); + WRITE32(stat.mtime.tv_nsec); + } + if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { + struct dentry *mnt_pnt, *mnt_root; + + if ((buflen -= 8) < 0) + goto out_resource; + mnt_root = exp->ex_mnt->mnt_root; + if (mnt_root->d_inode == dentry->d_inode) { + mnt_pnt = exp->ex_mnt->mnt_mountpoint; + WRITE64((u64) mnt_pnt->d_inode->i_ino); + } else + WRITE64((u64) stat.ino); + } + *attrlenp = htonl((char *)p - (char *)attrlenp - 4); + *countp = p - buffer; + status = nfs_ok; + +out: + nfs4_acl_free(acl); + if (fhp == &tempfh) + fh_put(&tempfh); + return status; +out_nfserr: + status = nfserrno(status); + goto out; +out_resource: + *countp = 0; + status = nfserr_resource; + goto out; +out_serverfault: + status = nfserr_serverfault; + goto out; +} + +static int +nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, + const char *name, int namlen, u32 *p, int *buflen) +{ + struct svc_export *exp = cd->rd_fhp->fh_export; + struct dentry *dentry; + int nfserr; + + dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); + if (IS_ERR(dentry)) + return nfserrno(PTR_ERR(dentry)); + + exp_get(exp); + if (d_mountpoint(dentry)) { + if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) { + /* + * -EAGAIN is the only error returned from + * nfsd_cross_mnt() and it indicates that an + * up-call has been initiated to fill in the export + * options on exp. When the answer comes back, + * this call will be retried. + */ + nfserr = nfserr_dropit; + goto out_put; + } + + } + nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, + cd->rd_rqstp); +out_put: + dput(dentry); + exp_put(exp); + return nfserr; +} + +static u32 * +nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr) +{ + u32 *attrlenp; + + if (buflen < 6) + return NULL; + *p++ = htonl(2); + *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ + *p++ = htonl(0); /* bmval1 */ + + attrlenp = p++; + *p++ = nfserr; /* no htonl */ + *attrlenp = htonl((char *)p - (char *)attrlenp - 4); + return p; +} + +static int +nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen, + loff_t offset, ino_t ino, unsigned int d_type) +{ + struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); + int buflen; + u32 *p = cd->buffer; + int nfserr = nfserr_toosmall; + + /* In nfsv4, "." and ".." never make it onto the wire.. */ + if (name && isdotent(name, namlen)) { + cd->common.err = nfs_ok; + return 0; + } + + if (cd->offset) + xdr_encode_hyper(cd->offset, (u64) offset); + + buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); + if (buflen < 0) + goto fail; + + *p++ = xdr_one; /* mark entry present */ + cd->offset = p; /* remember pointer */ + p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ + p = xdr_encode_array(p, name, namlen); /* name length & name */ + + nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); + switch (nfserr) { + case nfs_ok: + p += buflen; + break; + case nfserr_resource: + nfserr = nfserr_toosmall; + goto fail; + case nfserr_dropit: + goto fail; + default: + /* + * If the client requested the RDATTR_ERROR attribute, + * we stuff the error code into this attribute + * and continue. If this attribute was not requested, + * then in accordance with the spec, we fail the + * entire READDIR operation(!) + */ + if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) + goto fail; + nfserr = nfserr_toosmall; + p = nfsd4_encode_rdattr_error(p, buflen, nfserr); + if (p == NULL) + goto fail; + } + cd->buflen -= (p - cd->buffer); + cd->buffer = p; + cd->common.err = nfs_ok; + return 0; +fail: + cd->common.err = nfserr; + return -EINVAL; +} + +static void +nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access) +{ + ENCODE_HEAD; + + if (!nfserr) { + RESERVE_SPACE(8); + WRITE32(access->ac_supported); + WRITE32(access->ac_resp_access); + ADJUST_ARGS(); + } +} + +static void +nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close) +{ + ENCODE_SEQID_OP_HEAD; + + if (!nfserr) { + RESERVE_SPACE(sizeof(stateid_t)); + WRITE32(close->cl_stateid.si_generation); + WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t)); + ADJUST_ARGS(); + } + ENCODE_SEQID_OP_TAIL(close->cl_stateowner); +} + + +static void +nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit) +{ + ENCODE_HEAD; + + if (!nfserr) { + RESERVE_SPACE(8); + WRITEMEM(commit->co_verf.data, 8); + ADJUST_ARGS(); + } +} + +static void +nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create) +{ + ENCODE_HEAD; + + if (!nfserr) { + RESERVE_SPACE(32); + WRITECINFO(create->cr_cinfo); + WRITE32(2); + WRITE32(create->cr_bmval[0]); + WRITE32(create->cr_bmval[1]); + ADJUST_ARGS(); + } +} + +static int +nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr) +{ + struct svc_fh *fhp = getattr->ga_fhp; + int buflen; + + if (nfserr) + return nfserr; + + buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); + nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, + resp->p, &buflen, getattr->ga_bmval, + resp->rqstp); + + if (!nfserr) + resp->p += buflen; + return nfserr; +} + +static void +nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp) +{ + unsigned int len; + ENCODE_HEAD; + + if (!nfserr) { + len = fhp->fh_handle.fh_size; + RESERVE_SPACE(len + 4); + WRITE32(len); + WRITEMEM(&fhp->fh_handle.fh_base, len); + ADJUST_ARGS(); + } +} + +/* +* Including all fields other than the name, a LOCK4denied structure requires +* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. +*/ +static void +nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) +{ + ENCODE_HEAD; + + RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); + WRITE64(ld->ld_start); + WRITE64(ld->ld_length); + WRITE32(ld->ld_type); + if (ld->ld_sop) { + WRITEMEM(&ld->ld_clientid, 8); + WRITE32(ld->ld_sop->so_owner.len); + WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); + kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); + } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ + WRITE64((u64)0); /* clientid */ + WRITE32(0); /* length of owner name */ + } + ADJUST_ARGS(); +} + +static void +nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock) +{ + + ENCODE_SEQID_OP_HEAD; + + if (!nfserr) { + RESERVE_SPACE(4 + sizeof(stateid_t)); + WRITE32(lock->lk_resp_stateid.si_generation); + WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); + ADJUST_ARGS(); + } else if (nfserr == nfserr_denied) + nfsd4_encode_lock_denied(resp, &lock->lk_denied); + + ENCODE_SEQID_OP_TAIL(lock->lk_stateowner); +} + +static void +nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt) +{ + if (nfserr == nfserr_denied) + nfsd4_encode_lock_denied(resp, &lockt->lt_denied); +} + +static void +nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku) +{ + ENCODE_SEQID_OP_HEAD; + + if (!nfserr) { + RESERVE_SPACE(sizeof(stateid_t)); + WRITE32(locku->lu_stateid.si_generation); + WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t)); + ADJUST_ARGS(); + } + + ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); +} + + +static void +nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link) +{ + ENCODE_HEAD; + + if (!nfserr) { + RESERVE_SPACE(20); + WRITECINFO(link->li_cinfo); + ADJUST_ARGS(); + } +} + + +static void +nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open) +{ + ENCODE_SEQID_OP_HEAD; + + if (nfserr) + goto out; + + RESERVE_SPACE(36 + sizeof(stateid_t)); + WRITE32(open->op_stateid.si_generation); + WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t)); + WRITECINFO(open->op_cinfo); + WRITE32(open->op_rflags); + WRITE32(2); + WRITE32(open->op_bmval[0]); + WRITE32(open->op_bmval[1]); + WRITE32(open->op_delegate_type); + ADJUST_ARGS(); + + switch (open->op_delegate_type) { + case NFS4_OPEN_DELEGATE_NONE: + break; + case NFS4_OPEN_DELEGATE_READ: + RESERVE_SPACE(20 + sizeof(stateid_t)); + WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); + WRITE32(0); + + /* + * TODO: ACE's in delegations + */ + WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); + WRITE32(0); + WRITE32(0); + WRITE32(0); /* XXX: is NULL principal ok? */ + ADJUST_ARGS(); + break; + case NFS4_OPEN_DELEGATE_WRITE: + RESERVE_SPACE(32 + sizeof(stateid_t)); + WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t)); + WRITE32(0); + + /* + * TODO: space_limit's in delegations + */ + WRITE32(NFS4_LIMIT_SIZE); + WRITE32(~(u32)0); + WRITE32(~(u32)0); + + /* + * TODO: ACE's in delegations + */ + WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); + WRITE32(0); + WRITE32(0); + WRITE32(0); /* XXX: is NULL principal ok? */ + ADJUST_ARGS(); + break; + default: + BUG(); + } + /* XXX save filehandle here */ +out: + ENCODE_SEQID_OP_TAIL(open->op_stateowner); +} + +static void +nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc) +{ + ENCODE_SEQID_OP_HEAD; + + if (!nfserr) { + RESERVE_SPACE(sizeof(stateid_t)); + WRITE32(oc->oc_resp_stateid.si_generation); + WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t)); + ADJUST_ARGS(); + } + + ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); +} + +static void +nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od) +{ + ENCODE_SEQID_OP_HEAD; + + if (!nfserr) { + RESERVE_SPACE(sizeof(stateid_t)); + WRITE32(od->od_stateid.si_generation); + WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t)); + ADJUST_ARGS(); + } + + ENCODE_SEQID_OP_TAIL(od->od_stateowner); +} + +static int +nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read) +{ + u32 eof; + int v, pn; + unsigned long maxcount; + long len; + ENCODE_HEAD; + + if (nfserr) + return nfserr; + if (resp->xbuf->page_len) + return nfserr_resource; + + RESERVE_SPACE(8); /* eof flag and byte count */ + + maxcount = NFSSVC_MAXBLKSIZE; + if (maxcount > read->rd_length) + maxcount = read->rd_length; + + len = maxcount; + v = 0; + while (len > 0) { + pn = resp->rqstp->rq_resused; + svc_take_page(resp->rqstp); + read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]); + read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE; + v++; + len -= PAGE_SIZE; + } + read->rd_vlen = v; + + nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp, + read->rd_offset, read->rd_iov, read->rd_vlen, + &maxcount); + + if (nfserr == nfserr_symlink) + nfserr = nfserr_inval; + if (nfserr) + return nfserr; + eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size); + + WRITE32(eof); + WRITE32(maxcount); + ADJUST_ARGS(); + resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; + + resp->xbuf->page_len = maxcount; + + /* read zero bytes -> don't set up tail */ + if(!maxcount) + return 0; + + /* set up page for remaining responses */ + svc_take_page(resp->rqstp); + resp->xbuf->tail[0].iov_base = + page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); + resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1; + resp->xbuf->tail[0].iov_len = 0; + resp->p = resp->xbuf->tail[0].iov_base; + resp->end = resp->p + PAGE_SIZE/4; + + if (maxcount&3) { + *(resp->p)++ = 0; + resp->xbuf->tail[0].iov_base += maxcount&3; + resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); + } + return 0; +} + +static int +nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink) +{ + int maxcount; + char *page; + ENCODE_HEAD; + + if (nfserr) + return nfserr; + if (resp->xbuf->page_len) + return nfserr_resource; + + svc_take_page(resp->rqstp); + page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); + + maxcount = PAGE_SIZE; + RESERVE_SPACE(4); + + /* + * XXX: By default, the ->readlink() VFS op will truncate symlinks + * if they would overflow the buffer. Is this kosher in NFSv4? If + * not, one easy fix is: if ->readlink() precisely fills the buffer, + * assume that truncation occurred, and return NFS4ERR_RESOURCE. + */ + nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); + if (nfserr == nfserr_isdir) + return nfserr_inval; + if (nfserr) + return nfserr; + + WRITE32(maxcount); + ADJUST_ARGS(); + resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; + + svc_take_page(resp->rqstp); + resp->xbuf->tail[0].iov_base = + page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); + resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1; + resp->xbuf->tail[0].iov_len = 0; + resp->p = resp->xbuf->tail[0].iov_base; + resp->end = resp->p + PAGE_SIZE/4; + + resp->xbuf->page_len = maxcount; + if (maxcount&3) { + *(resp->p)++ = 0; + resp->xbuf->tail[0].iov_base += maxcount&3; + resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); + } + return 0; +} + +static int +nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir) +{ + int maxcount; + loff_t offset; + u32 *page, *savep; + ENCODE_HEAD; + + if (nfserr) + return nfserr; + if (resp->xbuf->page_len) + return nfserr_resource; + + RESERVE_SPACE(8); /* verifier */ + savep = p; + + /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ + WRITE32(0); + WRITE32(0); + ADJUST_ARGS(); + resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; + + maxcount = PAGE_SIZE; + if (maxcount > readdir->rd_maxcount) + maxcount = readdir->rd_maxcount; + + /* + * Convert from bytes to words, account for the two words already + * written, make sure to leave two words at the end for the next + * pointer and eof field. + */ + maxcount = (maxcount >> 2) - 4; + if (maxcount < 0) { + nfserr = nfserr_toosmall; + goto err_no_verf; + } + + svc_take_page(resp->rqstp); + page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); + readdir->common.err = 0; + readdir->buflen = maxcount; + readdir->buffer = page; + readdir->offset = NULL; + + offset = readdir->rd_cookie; + nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, + &offset, + &readdir->common, nfsd4_encode_dirent); + if (nfserr == nfs_ok && + readdir->common.err == nfserr_toosmall && + readdir->buffer == page) + nfserr = nfserr_toosmall; + if (nfserr == nfserr_symlink) + nfserr = nfserr_notdir; + if (nfserr) + goto err_no_verf; + + if (readdir->offset) + xdr_encode_hyper(readdir->offset, offset); + + p = readdir->buffer; + *p++ = 0; /* no more entries */ + *p++ = htonl(readdir->common.err == nfserr_eof); + resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); + + /* allocate a page for the tail */ + svc_take_page(resp->rqstp); + resp->xbuf->tail[0].iov_base = + page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); + resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1; + resp->xbuf->tail[0].iov_len = 0; + resp->p = resp->xbuf->tail[0].iov_base; + resp->end = resp->p + PAGE_SIZE/4; + + return 0; +err_no_verf: + p = savep; + ADJUST_ARGS(); + return nfserr; +} + +static void +nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove) +{ + ENCODE_HEAD; + + if (!nfserr) { + RESERVE_SPACE(20); + WRITECINFO(remove->rm_cinfo); + ADJUST_ARGS(); + } +} + +static void +nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename) +{ + ENCODE_HEAD; + + if (!nfserr) { + RESERVE_SPACE(40); + WRITECINFO(rename->rn_sinfo); + WRITECINFO(rename->rn_tinfo); + ADJUST_ARGS(); + } +} + +/* + * The SETATTR encode routine is special -- it always encodes a bitmap, + * regardless of the error status. + */ +static void +nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr) +{ + ENCODE_HEAD; + + RESERVE_SPACE(12); + if (nfserr) { + WRITE32(2); + WRITE32(0); + WRITE32(0); + } + else { + WRITE32(2); + WRITE32(setattr->sa_bmval[0]); + WRITE32(setattr->sa_bmval[1]); + } + ADJUST_ARGS(); +} + +static void +nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd) +{ + ENCODE_HEAD; + + if (!nfserr) { + RESERVE_SPACE(8 + sizeof(nfs4_verifier)); + WRITEMEM(&scd->se_clientid, 8); + WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); + ADJUST_ARGS(); + } + else if (nfserr == nfserr_clid_inuse) { + RESERVE_SPACE(8); + WRITE32(0); + WRITE32(0); + ADJUST_ARGS(); + } +} + +static void +nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write) +{ + ENCODE_HEAD; + + if (!nfserr) { + RESERVE_SPACE(16); + WRITE32(write->wr_bytes_written); + WRITE32(write->wr_how_written); + WRITEMEM(write->wr_verifier.data, 8); + ADJUST_ARGS(); + } +} + +void +nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) +{ + u32 *statp; + ENCODE_HEAD; + + RESERVE_SPACE(8); + WRITE32(op->opnum); + statp = p++; /* to be backfilled at the end */ + ADJUST_ARGS(); + + switch (op->opnum) { + case OP_ACCESS: + nfsd4_encode_access(resp, op->status, &op->u.access); + break; + case OP_CLOSE: + nfsd4_encode_close(resp, op->status, &op->u.close); + break; + case OP_COMMIT: + nfsd4_encode_commit(resp, op->status, &op->u.commit); + break; + case OP_CREATE: + nfsd4_encode_create(resp, op->status, &op->u.create); + break; + case OP_DELEGRETURN: + break; + case OP_GETATTR: + op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr); + break; + case OP_GETFH: + nfsd4_encode_getfh(resp, op->status, op->u.getfh); + break; + case OP_LINK: + nfsd4_encode_link(resp, op->status, &op->u.link); + break; + case OP_LOCK: + nfsd4_encode_lock(resp, op->status, &op->u.lock); + break; + case OP_LOCKT: + nfsd4_encode_lockt(resp, op->status, &op->u.lockt); + break; + case OP_LOCKU: + nfsd4_encode_locku(resp, op->status, &op->u.locku); + break; + case OP_LOOKUP: + break; + case OP_LOOKUPP: + break; + case OP_NVERIFY: + break; + case OP_OPEN: + nfsd4_encode_open(resp, op->status, &op->u.open); + break; + case OP_OPEN_CONFIRM: + nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm); + break; + case OP_OPEN_DOWNGRADE: + nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade); + break; + case OP_PUTFH: + break; + case OP_PUTROOTFH: + break; + case OP_READ: + op->status = nfsd4_encode_read(resp, op->status, &op->u.read); + break; + case OP_READDIR: + op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir); + break; + case OP_READLINK: + op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink); + break; + case OP_REMOVE: + nfsd4_encode_remove(resp, op->status, &op->u.remove); + break; + case OP_RENAME: + nfsd4_encode_rename(resp, op->status, &op->u.rename); + break; + case OP_RENEW: + break; + case OP_RESTOREFH: + break; + case OP_SAVEFH: + break; + case OP_SETATTR: + nfsd4_encode_setattr(resp, op->status, &op->u.setattr); + break; + case OP_SETCLIENTID: + nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid); + break; + case OP_SETCLIENTID_CONFIRM: + break; + case OP_VERIFY: + break; + case OP_WRITE: + nfsd4_encode_write(resp, op->status, &op->u.write); + break; + case OP_RELEASE_LOCKOWNER: + break; + default: + break; + } + + /* + * Note: We write the status directly, instead of using WRITE32(), + * since it is already in network byte order. + */ + *statp = op->status; +} + +/* + * Encode the reply stored in the stateowner reply cache + * + * XDR note: do not encode rp->rp_buflen: the buffer contains the + * previously sent already encoded operation. + * + * called with nfs4_lock_state() held + */ +void +nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) +{ + ENCODE_HEAD; + struct nfs4_replay *rp = op->replay; + + BUG_ON(!rp); + + RESERVE_SPACE(8); + WRITE32(op->opnum); + *p++ = rp->rp_status; /* already xdr'ed */ + ADJUST_ARGS(); + + RESERVE_SPACE(rp->rp_buflen); + WRITEMEM(rp->rp_buf, rp->rp_buflen); + ADJUST_ARGS(); +} + +/* + * END OF "GENERIC" ENCODE ROUTINES. + */ + +int +nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy) +{ + return xdr_ressize_check(rqstp, p); +} + +void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) +{ + if (args->ops != args->iops) { + kfree(args->ops); + args->ops = args->iops; + } + if (args->tmpp) { + kfree(args->tmpp); + args->tmpp = NULL; + } + while (args->to_free) { + struct tmpbuf *tb = args->to_free; + args->to_free = tb->next; + tb->release(tb->buf); + kfree(tb); + } +} + +int +nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args) +{ + int status; + + args->p = p; + args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; + args->pagelist = rqstp->rq_arg.pages; + args->pagelen = rqstp->rq_arg.page_len; + args->tmpp = NULL; + args->to_free = NULL; + args->ops = args->iops; + args->rqstp = rqstp; + + status = nfsd4_decode_compound(args); + if (status) { + nfsd4_release_compoundargs(args); + } + return !status; +} + +int +nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp) +{ + /* + * All that remains is to write the tag and operation count... + */ + struct kvec *iov; + p = resp->tagp; + *p++ = htonl(resp->taglen); + memcpy(p, resp->tag, resp->taglen); + p += XDR_QUADLEN(resp->taglen); + *p++ = htonl(resp->opcnt); + + if (rqstp->rq_res.page_len) + iov = &rqstp->rq_res.tail[0]; + else + iov = &rqstp->rq_res.head[0]; + iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; + BUG_ON(iov->iov_len > PAGE_SIZE); + return 1; +} + +/* + * Local variables: + * c-basic-offset: 8 + * End: + */ |
