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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 09:10:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 09:10:19 -0700
commit790eac5640abf7a57fa3a644386df330e18c11b0 (patch)
tree08de20bde44f59e51b91ff473a71047c2957e8c9 /fs
parent0b0585c3e192967cb2ef0ac0816eb8a8c8d99840 (diff)
parent48bde8d3620f5f3c6ae9ff599eb404055ae51664 (diff)
downloadop-kernel-dev-790eac5640abf7a57fa3a644386df330e18c11b0.zip
op-kernel-dev-790eac5640abf7a57fa3a644386df330e18c11b0.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull second set of VFS changes from Al Viro: "Assorted f_pos race fixes, making do_splice_direct() safe to call with i_mutex on parent, O_TMPFILE support, Jeff's locks.c series, ->d_hash/->d_compare calling conventions changes from Linus, misc stuff all over the place." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits) Document ->tmpfile() ext4: ->tmpfile() support vfs: export lseek_execute() to modules lseek_execute() doesn't need an inode passed to it block_dev: switch to fixed_size_llseek() cpqphp_sysfs: switch to fixed_size_llseek() tile-srom: switch to fixed_size_llseek() proc_powerpc: switch to fixed_size_llseek() ubi/cdev: switch to fixed_size_llseek() pci/proc: switch to fixed_size_llseek() isapnp: switch to fixed_size_llseek() lpfc: switch to fixed_size_llseek() locks: give the blocked_hash its own spinlock locks: add a new "lm_owner_key" lock operation locks: turn the blocked_list into a hashtable locks: convert fl_link to a hlist_node locks: avoid taking global lock if possible when waking up blocked waiters locks: protect most of the file_lock handling with i_lock locks: encapsulate the fl_link list handling locks: make "added" in __posix_lock_file a bool ...
Diffstat (limited to 'fs')
-rw-r--r--fs/adfs/dir.c6
-rw-r--r--fs/affs/namei.c26
-rw-r--r--fs/afs/flock.c7
-rw-r--r--fs/aio.c2
-rw-r--r--fs/block_dev.c23
-rw-r--r--fs/btrfs/file.c15
-rw-r--r--fs/btrfs/ioctl.c8
-rw-r--r--fs/ceph/file.c11
-rw-r--r--fs/ceph/locks.c2
-rw-r--r--fs/ceph/mds_client.c8
-rw-r--r--fs/cifs/cifsfs.c2
-rw-r--r--fs/cifs/dir.c9
-rw-r--r--fs/cifs/file.c15
-rw-r--r--fs/coda/dir.c8
-rw-r--r--fs/dcache.c66
-rw-r--r--fs/ecryptfs/crypto.c5
-rw-r--r--fs/ecryptfs/ecryptfs_kernel.h2
-rw-r--r--fs/ecryptfs/file.c9
-rw-r--r--fs/ecryptfs/inode.c2
-rw-r--r--fs/efivarfs/super.c9
-rw-r--r--fs/exec.c10
-rw-r--r--fs/ext2/namei.c24
-rw-r--r--fs/ext3/namei.c47
-rw-r--r--fs/ext4/file.c24
-rw-r--r--fs/ext4/namei.c47
-rw-r--r--fs/fat/namei_msdos.c6
-rw-r--r--fs/fat/namei_vfat.c12
-rw-r--r--fs/file_table.c2
-rw-r--r--fs/fuse/file.c3
-rw-r--r--fs/gfs2/dentry.c3
-rw-r--r--fs/gfs2/file.c2
-rw-r--r--fs/hfs/hfs_fs.h7
-rw-r--r--fs/hfs/string.c6
-rw-r--r--fs/hfsplus/hfsplus_fs.h7
-rw-r--r--fs/hfsplus/unicode.c7
-rw-r--r--fs/hpfs/dentry.c7
-rw-r--r--fs/inode.c4
-rw-r--r--fs/internal.h6
-rw-r--r--fs/isofs/inode.c48
-rw-r--r--fs/isofs/namei.c3
-rw-r--r--fs/jfs/namei.c7
-rw-r--r--fs/lockd/svclock.c14
-rw-r--r--fs/lockd/svcsubs.c12
-rw-r--r--fs/locks.c281
-rw-r--r--fs/minix/dir.c2
-rw-r--r--fs/minix/namei.c13
-rw-r--r--fs/namei.c113
-rw-r--r--fs/ncpfs/dir.c45
-rw-r--r--fs/ncpfs/inode.c4
-rw-r--r--fs/nfs/delegation.c10
-rw-r--r--fs/nfs/nfs4state.c8
-rw-r--r--fs/nfsd/nfs4state.c8
-rw-r--r--fs/notify/fanotify/fanotify_user.c3
-rw-r--r--fs/ocfs2/file.c12
-rw-r--r--fs/open.c63
-rw-r--r--fs/proc/base.c105
-rw-r--r--fs/proc/fd.c18
-rw-r--r--fs/proc/internal.h2
-rw-r--r--fs/proc/namespaces.c13
-rw-r--r--fs/proc/proc_sysctl.c7
-rw-r--r--fs/read_write.c65
-rw-r--r--fs/splice.c38
-rw-r--r--fs/sysv/namei.c3
-rw-r--r--fs/udf/namei.c24
-rw-r--r--fs/xfs/xfs_file.c6
65 files changed, 800 insertions, 586 deletions
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index ade28bb..0d138c0 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -191,8 +191,7 @@ const struct file_operations adfs_dir_operations = {
};
static int
-adfs_hash(const struct dentry *parent, const struct inode *inode,
- struct qstr *qstr)
+adfs_hash(const struct dentry *parent, struct qstr *qstr)
{
const unsigned int name_len = ADFS_SB(parent->d_sb)->s_namelen;
const unsigned char *name;
@@ -228,8 +227,7 @@ adfs_hash(const struct dentry *parent, const struct inode *inode,
* requirements of the underlying filesystem.
*/
static int
-adfs_compare(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+adfs_compare(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
int i;
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index ff65884..c36cbb4 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -13,18 +13,12 @@
typedef int (*toupper_t)(int);
static int affs_toupper(int ch);
-static int affs_hash_dentry(const struct dentry *,
- const struct inode *, struct qstr *);
-static int affs_compare_dentry(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int affs_hash_dentry(const struct dentry *, struct qstr *);
+static int affs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
static int affs_intl_toupper(int ch);
-static int affs_intl_hash_dentry(const struct dentry *,
- const struct inode *, struct qstr *);
-static int affs_intl_compare_dentry(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int affs_intl_hash_dentry(const struct dentry *, struct qstr *);
+static int affs_intl_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
const struct dentry_operations affs_dentry_operations = {
@@ -86,14 +80,12 @@ __affs_hash_dentry(struct qstr *qstr, toupper_t toupper)
}
static int
-affs_hash_dentry(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+affs_hash_dentry(const struct dentry *dentry, struct qstr *qstr)
{
return __affs_hash_dentry(qstr, affs_toupper);
}
static int
-affs_intl_hash_dentry(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+affs_intl_hash_dentry(const struct dentry *dentry, struct qstr *qstr)
{
return __affs_hash_dentry(qstr, affs_intl_toupper);
}
@@ -131,15 +123,13 @@ static inline int __affs_compare_dentry(unsigned int len,
}
static int
-affs_compare_dentry(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+affs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return __affs_compare_dentry(len, str, name, affs_toupper);
}
static int
-affs_intl_compare_dentry(const struct dentry *parent,const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+affs_intl_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return __affs_compare_dentry(len, str, name, affs_intl_toupper);
diff --git a/fs/afs/flock.c b/fs/afs/flock.c
index 2497bf3..a8cf2cf 100644
--- a/fs/afs/flock.c
+++ b/fs/afs/flock.c
@@ -252,7 +252,8 @@ static void afs_defer_unlock(struct afs_vnode *vnode, struct key *key)
*/
static int afs_do_setlk(struct file *file, struct file_lock *fl)
{
- struct afs_vnode *vnode = AFS_FS_I(file->f_mapping->host);
+ struct inode *inode = file_inode(file);
+ struct afs_vnode *vnode = AFS_FS_I(inode);
afs_lock_type_t type;
struct key *key = file->private_data;
int ret;
@@ -273,7 +274,7 @@ static int afs_do_setlk(struct file *file, struct file_lock *fl)
type = (fl->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;
- lock_flocks();
+ spin_lock(&inode->i_lock);
/* make sure we've got a callback on this file and that our view of the
* data version is up to date */
@@ -420,7 +421,7 @@ given_lock:
afs_vnode_fetch_status(vnode, NULL, key);
error:
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
_leave(" = %d", ret);
return ret;
diff --git a/fs/aio.c b/fs/aio.c
index 2bbcacf..a8ecc83 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -39,6 +39,8 @@
#include <asm/kmap_types.h>
#include <asm/uaccess.h>
+#include "internal.h"
+
#define AIO_RING_MAGIC 0xa10a10a1
#define AIO_RING_COMPAT_FEATURES 1
#define AIO_RING_INCOMPAT_FEATURES 0
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 2091db8..431b6a0 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -325,31 +325,10 @@ static int blkdev_write_end(struct file *file, struct address_space *mapping,
static loff_t block_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *bd_inode = file->f_mapping->host;
- loff_t size;
loff_t retval;
mutex_lock(&bd_inode->i_mutex);
- size = i_size_read(bd_inode);
-
- retval = -EINVAL;
- switch (whence) {
- case SEEK_END:
- offset += size;
- break;
- case SEEK_CUR:
- offset += file->f_pos;
- case SEEK_SET:
- break;
- default:
- goto out;
- }
- if (offset >= 0 && offset <= size) {
- if (offset != file->f_pos) {
- file->f_pos = offset;
- }
- retval = offset;
- }
-out:
+ retval = fixed_size_llseek(file, offset, whence, i_size_read(bd_inode));
mutex_unlock(&bd_inode->i_mutex);
return retval;
}
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 4205ba7..89da56a 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2425,20 +2425,7 @@ static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int whence)
}
}
- if (offset < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET)) {
- offset = -EINVAL;
- goto out;
- }
- if (offset > inode->i_sb->s_maxbytes) {
- offset = -EINVAL;
- goto out;
- }
-
- /* Special lock needed here? */
- if (offset != file->f_pos) {
- file->f_pos = offset;
- file->f_version = 0;
- }
+ offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
out:
mutex_unlock(&inode->i_mutex);
return offset;
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 0f81d67..cd7e96c 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3881,7 +3881,7 @@ drop_write:
static long btrfs_ioctl_quota_rescan(struct file *file, void __user *arg)
{
- struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
+ struct btrfs_root *root = BTRFS_I(file_inode(file))->root;
struct btrfs_ioctl_quota_rescan_args *qsa;
int ret;
@@ -3914,7 +3914,7 @@ drop_write:
static long btrfs_ioctl_quota_rescan_status(struct file *file, void __user *arg)
{
- struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
+ struct btrfs_root *root = BTRFS_I(file_inode(file))->root;
struct btrfs_ioctl_quota_rescan_args *qsa;
int ret = 0;
@@ -4020,7 +4020,7 @@ out:
static int btrfs_ioctl_get_fslabel(struct file *file, void __user *arg)
{
- struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
+ struct btrfs_root *root = BTRFS_I(file_inode(file))->root;
const char *label = root->fs_info->super_copy->label;
size_t len = strnlen(label, BTRFS_LABEL_SIZE);
int ret;
@@ -4039,7 +4039,7 @@ static int btrfs_ioctl_get_fslabel(struct file *file, void __user *arg)
static int btrfs_ioctl_set_fslabel(struct file *file, void __user *arg)
{
- struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root;
+ struct btrfs_root *root = BTRFS_I(file_inode(file))->root;
struct btrfs_super_block *super_block = root->fs_info->super_copy;
struct btrfs_trans_handle *trans;
char label[BTRFS_LABEL_SIZE];
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 656e169..16c989d 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -866,16 +866,7 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
break;
}
- if (offset < 0 || offset > inode->i_sb->s_maxbytes) {
- offset = -EINVAL;
- goto out;
- }
-
- /* Special lock needed here? */
- if (offset != file->f_pos) {
- file->f_pos = offset;
- file->f_version = 0;
- }
+ offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
out:
mutex_unlock(&inode->i_mutex);
diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c
index ebbf680..690f73f 100644
--- a/fs/ceph/locks.c
+++ b/fs/ceph/locks.c
@@ -192,7 +192,7 @@ void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count)
/**
* Encode the flock and fcntl locks for the given inode into the ceph_filelock
- * array. Must be called with lock_flocks() already held.
+ * array. Must be called with inode->i_lock already held.
* If we encounter more of a specific lock type than expected, return -ENOSPC.
*/
int ceph_encode_locks_to_buffer(struct inode *inode,
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 4d29203..74fd289 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -2481,20 +2481,20 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
struct ceph_filelock *flocks;
encode_again:
- lock_flocks();
+ spin_lock(&inode->i_lock);
ceph_count_locks(inode, &num_fcntl_locks, &num_flock_locks);
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
flocks = kmalloc((num_fcntl_locks+num_flock_locks) *
sizeof(struct ceph_filelock), GFP_NOFS);
if (!flocks) {
err = -ENOMEM;
goto out_free;
}
- lock_flocks();
+ spin_lock(&inode->i_lock);
err = ceph_encode_locks_to_buffer(inode, flocks,
num_fcntl_locks,
num_flock_locks);
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
if (err) {
kfree(flocks);
if (err == -ENOSPC)
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 540c1cc..a445e71 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -765,7 +765,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
{
- /* note that this is called by vfs setlease with lock_flocks held
+ /* note that this is called by vfs setlease with i_lock held
to protect *lease from going away */
struct inode *inode = file_inode(file);
struct cifsFileInfo *cfile = file->private_data;
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 5699b50..5175aeb 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -822,8 +822,7 @@ const struct dentry_operations cifs_dentry_ops = {
/* d_delete: cifs_d_delete, */ /* not needed except for debugging */
};
-static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode,
- struct qstr *q)
+static int cifs_ci_hash(const struct dentry *dentry, struct qstr *q)
{
struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
unsigned long hash;
@@ -838,12 +837,10 @@ static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode,
return 0;
}
-static int cifs_ci_compare(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int cifs_ci_compare(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
- struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls;
+ struct nls_table *codepage = CIFS_SB(parent->d_sb)->local_nls;
if ((name->len == len) &&
(nls_strnicmp(codepage, name->name, str, len) == 0))
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 4d8ba8d..91d8629 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -999,7 +999,7 @@ try_again:
rc = wait_event_interruptible(flock->fl_wait, !flock->fl_next);
if (!rc)
goto try_again;
- locks_delete_block(flock);
+ posix_unblock_lock(flock);
}
return rc;
}
@@ -1092,6 +1092,7 @@ struct lock_to_push {
static int
cifs_push_posix_locks(struct cifsFileInfo *cfile)
{
+ struct inode *inode = cfile->dentry->d_inode;
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
struct file_lock *flock, **before;
unsigned int count = 0, i = 0;
@@ -1102,12 +1103,12 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
xid = get_xid();
- lock_flocks();
- cifs_for_each_lock(cfile->dentry->d_inode, before) {
+ spin_lock(&inode->i_lock);
+ cifs_for_each_lock(inode, before) {
if ((*before)->fl_flags & FL_POSIX)
count++;
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
INIT_LIST_HEAD(&locks_to_send);
@@ -1126,8 +1127,8 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
}
el = locks_to_send.next;
- lock_flocks();
- cifs_for_each_lock(cfile->dentry->d_inode, before) {
+ spin_lock(&inode->i_lock);
+ cifs_for_each_lock(inode, before) {
flock = *before;
if ((flock->fl_flags & FL_POSIX) == 0)
continue;
@@ -1152,7 +1153,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
lck->offset = flock->fl_start;
el = el->next;
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
list_for_each_entry_safe(lck, tmp, &locks_to_send, llist) {
int stored_rc;
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 87e0ee9..14a1480 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -487,13 +487,7 @@ static int coda_venus_readdir(struct file *coda_file, struct dir_context *ctx)
/* skip null entries */
if (vdir->d_fileno && name.len) {
- /* try to look up this entry in the dcache, that way
- * userspace doesn't have to worry about breaking
- * getcwd by having mismatched inode numbers for
- * internal volume mountpoints. */
- ino = find_inode_number(de, &name);
- if (!ino) ino = vdir->d_fileno;
-
+ ino = vdir->d_fileno;
type = CDT2DT(vdir->d_type);
if (!dir_emit(ctx, name.name, name.len, ino, type))
break;
diff --git a/fs/dcache.c b/fs/dcache.c
index 5a23073..87bdb53 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1730,7 +1730,7 @@ EXPORT_SYMBOL(d_add_ci);
* Do the slow-case of the dentry name compare.
*
* Unlike the dentry_cmp() function, we need to atomically
- * load the name, length and inode information, so that the
+ * load the name and length information, so that the
* filesystem can rely on them, and can use the 'name' and
* 'len' information without worrying about walking off the
* end of memory etc.
@@ -1748,22 +1748,18 @@ enum slow_d_compare {
static noinline enum slow_d_compare slow_dentry_cmp(
const struct dentry *parent,
- struct inode *inode,
struct dentry *dentry,
unsigned int seq,
const struct qstr *name)
{
int tlen = dentry->d_name.len;
const char *tname = dentry->d_name.name;
- struct inode *i = dentry->d_inode;
if (read_seqcount_retry(&dentry->d_seq, seq)) {
cpu_relax();
return D_COMP_SEQRETRY;
}
- if (parent->d_op->d_compare(parent, inode,
- dentry, i,
- tlen, tname, name))
+ if (parent->d_op->d_compare(parent, dentry, tlen, tname, name))
return D_COMP_NOMATCH;
return D_COMP_OK;
}
@@ -1773,7 +1769,6 @@ static noinline enum slow_d_compare slow_dentry_cmp(
* @parent: parent dentry
* @name: qstr of name we wish to find
* @seqp: returns d_seq value at the point where the dentry was found
- * @inode: returns dentry->d_inode when the inode was found valid.
* Returns: dentry, or NULL
*
* __d_lookup_rcu is the dcache lookup function for rcu-walk name
@@ -1800,7 +1795,7 @@ static noinline enum slow_d_compare slow_dentry_cmp(
*/
struct dentry *__d_lookup_rcu(const struct dentry *parent,
const struct qstr *name,
- unsigned *seqp, struct inode *inode)
+ unsigned *seqp)
{
u64 hashlen = name->hash_len;
const unsigned char *str = name->name;
@@ -1834,11 +1829,10 @@ struct dentry *__d_lookup_rcu(const struct dentry *parent,
seqretry:
/*
* The dentry sequence count protects us from concurrent
- * renames, and thus protects inode, parent and name fields.
+ * renames, and thus protects parent and name fields.
*
* The caller must perform a seqcount check in order
- * to do anything useful with the returned dentry,
- * including using the 'd_inode' pointer.
+ * to do anything useful with the returned dentry.
*
* NOTE! We do a "raw" seqcount_begin here. That means that
* we don't wait for the sequence count to stabilize if it
@@ -1852,12 +1846,12 @@ seqretry:
continue;
if (d_unhashed(dentry))
continue;
- *seqp = seq;
if (unlikely(parent->d_flags & DCACHE_OP_COMPARE)) {
if (dentry->d_name.hash != hashlen_hash(hashlen))
continue;
- switch (slow_dentry_cmp(parent, inode, dentry, seq, name)) {
+ *seqp = seq;
+ switch (slow_dentry_cmp(parent, dentry, seq, name)) {
case D_COMP_OK:
return dentry;
case D_COMP_NOMATCH:
@@ -1869,6 +1863,7 @@ seqretry:
if (dentry->d_name.hash_len != hashlen)
continue;
+ *seqp = seq;
if (!dentry_cmp(dentry, str, hashlen_len(hashlen)))
return dentry;
}
@@ -1966,9 +1961,7 @@ struct dentry *__d_lookup(const struct dentry *parent, const struct qstr *name)
if (parent->d_flags & DCACHE_OP_COMPARE) {
int tlen = dentry->d_name.len;
const char *tname = dentry->d_name.name;
- if (parent->d_op->d_compare(parent, parent->d_inode,
- dentry, dentry->d_inode,
- tlen, tname, name))
+ if (parent->d_op->d_compare(parent, dentry, tlen, tname, name))
goto next;
} else {
if (dentry->d_name.len != len)
@@ -2005,7 +1998,7 @@ struct dentry *d_hash_and_lookup(struct dentry *dir, struct qstr *name)
*/
name->hash = full_name_hash(name->name, name->len);
if (dir->d_flags & DCACHE_OP_HASH) {
- int err = dir->d_op->d_hash(dir, dir->d_inode, name);
+ int err = dir->d_op->d_hash(dir, name);
if (unlikely(err < 0))
return ERR_PTR(err);
}
@@ -2975,34 +2968,21 @@ rename_retry:
goto again;
}
-/**
- * find_inode_number - check for dentry with name
- * @dir: directory to check
- * @name: Name to find.
- *
- * Check whether a dentry already exists for the given name,
- * and return the inode number if it has an inode. Otherwise
- * 0 is returned.
- *
- * This routine is used to post-process directory listings for
- * filesystems using synthetic inode numbers, and is necessary
- * to keep getcwd() working.
- */
-
-ino_t find_inode_number(struct dentry *dir, struct qstr *name)
+void d_tmpfile(struct dentry *dentry, struct inode *inode)
{
- struct dentry * dentry;
- ino_t ino = 0;
-
- dentry = d_hash_and_lookup(dir, name);
- if (!IS_ERR_OR_NULL(dentry)) {
- if (dentry->d_inode)
- ino = dentry->d_inode->i_ino;
- dput(dentry);
- }
- return ino;
+ inode_dec_link_count(inode);
+ BUG_ON(dentry->d_name.name != dentry->d_iname ||
+ !hlist_unhashed(&dentry->d_alias) ||
+ !d_unlinked(dentry));
+ spin_lock(&dentry->d_parent->d_lock);
+ spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
+ dentry->d_name.len = sprintf(dentry->d_iname, "#%llu",
+ (unsigned long long)inode->i_ino);
+ spin_unlock(&dentry->d_lock);
+ spin_unlock(&dentry->d_parent->d_lock);
+ d_instantiate(dentry, inode);
}
-EXPORT_SYMBOL(find_inode_number);
+EXPORT_SYMBOL(d_tmpfile);
static __initdata unsigned long dhash_entries;
static int __init set_dhash_entries(char *str)
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index f71ec12..cfa109a 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -2243,12 +2243,11 @@ out:
*/
int ecryptfs_decode_and_decrypt_filename(char **plaintext_name,
size_t *plaintext_name_size,
- struct dentry *ecryptfs_dir_dentry,
+ struct super_block *sb,
const char *name, size_t name_size)
{
struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
- &ecryptfs_superblock_to_private(
- ecryptfs_dir_dentry->d_sb)->mount_crypt_stat;
+ &ecryptfs_superblock_to_private(sb)->mount_crypt_stat;
char *decoded_name;
size_t decoded_name_size;
size_t packet_size;
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index f622a73..df19d34 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -575,7 +575,7 @@ int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
struct inode *ecryptfs_inode);
int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
size_t *decrypted_name_size,
- struct dentry *ecryptfs_dentry,
+ struct super_block *sb,
const char *name, size_t name_size);
int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
int ecryptfs_encrypt_and_encode_filename(
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 9aa05e0..24f1105 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -70,7 +70,7 @@ static ssize_t ecryptfs_read_update_atime(struct kiocb *iocb,
struct ecryptfs_getdents_callback {
struct dir_context ctx;
struct dir_context *caller;
- struct dentry *dentry;
+ struct super_block *sb;
int filldir_called;
int entries_written;
};
@@ -88,7 +88,7 @@ ecryptfs_filldir(void *dirent, const char *lower_name, int lower_namelen,
buf->filldir_called++;
rc = ecryptfs_decode_and_decrypt_filename(&name, &name_size,
- buf->dentry, lower_name,
+ buf->sb, lower_name,
lower_namelen);
if (rc) {
printk(KERN_ERR "%s: Error attempting to decode and decrypt "
@@ -114,15 +114,14 @@ static int ecryptfs_readdir(struct file *file, struct dir_context *ctx)
{
int rc;
struct file *lower_file;
- struct inode *inode;
+ struct inode *inode = file_inode(file);
struct ecryptfs_getdents_callback buf = {
.ctx.actor = ecryptfs_filldir,
.caller = ctx,
- .dentry = file->f_path.dentry
+ .sb = inode->i_sb,
};
lower_file = ecryptfs_file_to_lower(file);
lower_file->f_pos = ctx->pos;
- inode = file_inode(file);
rc = iterate_dir(lower_file, &buf.ctx);
ctx->pos = buf.ctx.pos;
if (rc < 0)
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 5eab400..a2f2bb2 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -679,7 +679,7 @@ static int ecryptfs_readlink_lower(struct dentry *dentry, char **buf,
set_fs(old_fs);
if (rc < 0)
goto out;
- rc = ecryptfs_decode_and_decrypt_filename(buf, bufsiz, dentry,
+ rc = ecryptfs_decode_and_decrypt_filename(buf, bufsiz, dentry->d_sb,
lower_buf, rc);
out:
kfree(lower_buf);
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
index 141aee3..a8766b8 100644
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -45,8 +45,8 @@ static struct super_block *efivarfs_sb;
* So we need to perform a case-sensitive match on part 1 and a
* case-insensitive match on part 2.
*/
-static int efivarfs_d_compare(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int efivarfs_d_compare(const struct dentry *parent,
+ const struct dentry *dentry,
unsigned int len, const char *str,
const struct qstr *name)
{
@@ -63,8 +63,7 @@ static int efivarfs_d_compare(const struct dentry *parent, const struct inode *p
return strncasecmp(name->name + guid, str + guid, EFI_VARIABLE_GUID_LEN);
}
-static int efivarfs_d_hash(const struct dentry *dentry,
- const struct inode *inode, struct qstr *qstr)
+static int efivarfs_d_hash(const struct dentry *dentry, struct qstr *qstr)
{
unsigned long hash = init_name_hash();
const unsigned char *s = qstr->name;
@@ -108,7 +107,7 @@ static struct dentry *efivarfs_alloc_dentry(struct dentry *parent, char *name)
q.name = name;
q.len = strlen(name);
- err = efivarfs_d_hash(NULL, NULL, &q);
+ err = efivarfs_d_hash(NULL, &q);
if (err)
return ERR_PTR(err);
diff --git a/fs/exec.c b/fs/exec.c
index ffd7a81..03b907c 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -110,13 +110,14 @@ SYSCALL_DEFINE1(uselib, const char __user *, library)
static const struct open_flags uselib_flags = {
.open_flag = O_LARGEFILE | O_RDONLY | __FMODE_EXEC,
.acc_mode = MAY_READ | MAY_EXEC | MAY_OPEN,
- .intent = LOOKUP_OPEN
+ .intent = LOOKUP_OPEN,
+ .lookup_flags = LOOKUP_FOLLOW,
};
if (IS_ERR(tmp))
goto out;
- file = do_filp_open(AT_FDCWD, tmp, &uselib_flags, LOOKUP_FOLLOW);
+ file = do_filp_open(AT_FDCWD, tmp, &uselib_flags);
putname(tmp);
error = PTR_ERR(file);
if (IS_ERR(file))
@@ -756,10 +757,11 @@ struct file *open_exec(const char *name)
static const struct open_flags open_exec_flags = {
.open_flag = O_LARGEFILE | O_RDONLY | __FMODE_EXEC,
.acc_mode = MAY_EXEC | MAY_OPEN,
- .intent = LOOKUP_OPEN
+ .intent = LOOKUP_OPEN,
+ .lookup_flags = LOOKUP_FOLLOW,
};
- file = do_filp_open(AT_FDCWD, &tmp, &open_exec_flags, LOOKUP_FOLLOW);
+ file = do_filp_open(AT_FDCWD, &tmp, &open_exec_flags);
if (IS_ERR(file))
goto out;
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index 73b0d95..256dd5f 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -119,6 +119,29 @@ static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode
return ext2_add_nondir(dentry, inode);
}
+static int ext2_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct inode *inode = ext2_new_inode(dir, mode, NULL);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ inode->i_op = &ext2_file_inode_operations;
+ if (ext2_use_xip(inode->i_sb)) {
+ inode->i_mapping->a_ops = &ext2_aops_xip;
+ inode->i_fop = &ext2_xip_file_operations;
+ } else if (test_opt(inode->i_sb, NOBH)) {
+ inode->i_mapping->a_ops = &ext2_nobh_aops;
+ inode->i_fop = &ext2_file_operations;
+ } else {
+ inode->i_mapping->a_ops = &ext2_aops;
+ inode->i_fop = &ext2_file_operations;
+ }
+ mark_inode_dirty(inode);
+ d_tmpfile(dentry, inode);
+ unlock_new_inode(inode);
+ return 0;
+}
+
static int ext2_mknod (struct inode * dir, struct dentry *dentry, umode_t mode, dev_t rdev)
{
struct inode * inode;
@@ -398,6 +421,7 @@ const struct inode_operations ext2_dir_inode_operations = {
#endif
.setattr = ext2_setattr,
.get_acl = ext2_get_acl,
+ .tmpfile = ext2_tmpfile,
};
const struct inode_operations ext2_special_inode_operations = {
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index cea8ecf..998ea11 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -1759,6 +1759,45 @@ retry:
return err;
}
+static int ext3_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ handle_t *handle;
+ struct inode *inode;
+ int err, retries = 0;
+
+ dquot_initialize(dir);
+
+retry:
+ handle = ext3_journal_start(dir, EXT3_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) +
+ 4 + EXT3_XATTR_TRANS_BLOCKS);
+
+ if (IS_ERR(handle))
+ return PTR_ERR(handle);
+
+ inode = ext3_new_inode (handle, dir, NULL, mode);
+ err = PTR_ERR(inode);
+ if (!IS_ERR(inode)) {
+ inode->i_op = &ext3_file_inode_operations;
+ inode->i_fop = &ext3_file_operations;
+ ext3_set_aops(inode);
+ err = ext3_orphan_add(handle, inode);
+ if (err)
+ goto err_drop_inode;
+ mark_inode_dirty(inode);
+ d_tmpfile(dentry, inode);
+ unlock_new_inode(inode);
+ }
+ ext3_journal_stop(handle);
+ if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries))
+ goto retry;
+ return err;
+err_drop_inode:
+ ext3_journal_stop(handle);
+ unlock_new_inode(inode);
+ iput(inode);
+ return err;
+}
+
static int ext3_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
{
handle_t *handle;
@@ -2300,7 +2339,7 @@ static int ext3_link (struct dentry * old_dentry,
retry:
handle = ext3_journal_start(dir, EXT3_DATA_TRANS_BLOCKS(dir->i_sb) +
- EXT3_INDEX_EXTRA_TRANS_BLOCKS);
+ EXT3_INDEX_EXTRA_TRANS_BLOCKS + 1);
if (IS_ERR(handle))
return PTR_ERR(handle);
@@ -2314,6 +2353,11 @@ retry:
err = ext3_add_entry(handle, dentry, inode);
if (!err) {
ext3_mark_inode_dirty(handle, inode);
+ /* this can happen only for tmpfile being
+ * linked the first time
+ */
+ if (inode->i_nlink == 1)
+ ext3_orphan_del(handle, inode);
d_instantiate(dentry, inode);
} else {
drop_nlink(inode);
@@ -2516,6 +2560,7 @@ const struct inode_operations ext3_dir_inode_operations = {
.mkdir = ext3_mkdir,
.rmdir = ext3_rmdir,
.mknod = ext3_mknod,
+ .tmpfile = ext3_tmpfile,
.rename = ext3_rename,
.setattr = ext3_setattr,
#ifdef CONFIG_EXT3_FS_XATTR
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index b19f0a4..6f4cc56 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -494,17 +494,7 @@ static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize)
if (dataoff > isize)
return -ENXIO;
- if (dataoff < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
- return -EINVAL;
- if (dataoff > maxsize)
- return -EINVAL;
-
- if (dataoff != file->f_pos) {
- file->f_pos = dataoff;
- file->f_version = 0;
- }
-
- return dataoff;
+ return vfs_setpos(file, dataoff, maxsize);
}
/*
@@ -580,17 +570,7 @@ static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize)
if (holeoff > isize)
holeoff = isize;
- if (holeoff < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
- return -EINVAL;
- if (holeoff > maxsize)
- return -EINVAL;
-
- if (holeoff != file->f_pos) {
- file->f_pos = holeoff;
- file->f_version = 0;
- }
-
- return holeoff;
+ return vfs_setpos(file, holeoff, maxsize);
}
/*
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index ab2f6dc..234b834 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2296,6 +2296,45 @@ retry:
return err;
}
+static int ext4_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ handle_t *handle;
+ struct inode *inode;
+ int err, retries = 0;
+
+ dquot_initialize(dir);
+
+retry:
+ inode = ext4_new_inode_start_handle(dir, mode,
+ NULL, 0, NULL,
+ EXT4_HT_DIR,
+ EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) +
+ 4 + EXT4_XATTR_TRANS_BLOCKS);
+ handle = ext4_journal_current_handle();
+ err = PTR_ERR(inode);
+ if (!IS_ERR(inode)) {
+ inode->i_op = &ext4_file_inode_operations;
+ inode->i_fop = &ext4_file_operations;
+ ext4_set_aops(inode);
+ err = ext4_orphan_add(handle, inode);
+ if (err)
+ goto err_drop_inode;
+ mark_inode_dirty(inode);
+ d_tmpfile(dentry, inode);
+ unlock_new_inode(inode);
+ }
+ if (handle)
+ ext4_journal_stop(handle);
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
+ goto retry;
+ return err;
+err_drop_inode:
+ ext4_journal_stop(handle);
+ unlock_new_inode(inode);
+ iput(inode);
+ return err;
+}
+
struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
struct ext4_dir_entry_2 *de,
int blocksize, int csum_size,
@@ -2903,7 +2942,7 @@ static int ext4_link(struct dentry *old_dentry,
retry:
handle = ext4_journal_start(dir, EXT4_HT_DIR,
(EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
- EXT4_INDEX_EXTRA_TRANS_BLOCKS));
+ EXT4_INDEX_EXTRA_TRANS_BLOCKS) + 1);
if (IS_ERR(handle))
return PTR_ERR(handle);
@@ -2917,6 +2956,11 @@ retry:
err = ext4_add_entry(handle, dentry, inode);
if (!err) {
ext4_mark_inode_dirty(handle, inode);
+ /* this can happen only for tmpfile being
+ * linked the first time
+ */
+ if (inode->i_nlink == 1)
+ ext4_orphan_del(handle, inode);
d_instantiate(dentry, inode);
} else {
drop_nlink(inode);
@@ -3169,6 +3213,7 @@ const struct inode_operations ext4_dir_inode_operations = {
.mkdir = ext4_mkdir,
.rmdir = ext4_rmdir,
.mknod = ext4_mknod,
+ .tmpfile = ext4_tmpfile,
.rename = ext4_rename,
.setattr = ext4_setattr,
.setxattr = generic_setxattr,
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index 081b759..a783b0e 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -148,8 +148,7 @@ static int msdos_find(struct inode *dir, const unsigned char *name, int len,
* that the existing dentry can be used. The msdos fs routines will
* return ENOENT or EINVAL as appropriate.
*/
-static int msdos_hash(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+static int msdos_hash(const struct dentry *dentry, struct qstr *qstr)
{
struct fat_mount_options *options = &MSDOS_SB(dentry->d_sb)->options;
unsigned char msdos_name[MSDOS_NAME];
@@ -165,8 +164,7 @@ static int msdos_hash(const struct dentry *dentry, const struct inode *inode,
* Compare two msdos names. If either of the names are invalid,
* we fall back to doing the standard name comparison.
*/
-static int msdos_cmp(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int msdos_cmp(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
struct fat_mount_options *options = &MSDOS_SB(parent->d_sb)->options;
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 2da9520..6df8d3d 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -107,8 +107,7 @@ static unsigned int vfat_striptail_len(const struct qstr *qstr)
* that the existing dentry can be used. The vfat fs routines will
* return ENOENT or EINVAL as appropriate.
*/
-static int vfat_hash(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+static int vfat_hash(const struct dentry *dentry, struct qstr *qstr)
{
qstr->hash = full_name_hash(qstr->name, vfat_striptail_len(qstr));
return 0;
@@ -120,8 +119,7 @@ static int vfat_hash(const struct dentry *dentry, const struct inode *inode,
* that the existing dentry can be used. The vfat fs routines will
* return ENOENT or EINVAL as appropriate.
*/
-static int vfat_hashi(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+static int vfat_hashi(const struct dentry *dentry, struct qstr *qstr)
{
struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io;
const unsigned char *name;
@@ -142,8 +140,7 @@ static int vfat_hashi(const struct dentry *dentry, const struct inode *inode,
/*
* Case insensitive compare of two vfat names.
*/
-static int vfat_cmpi(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int vfat_cmpi(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
struct nls_table *t = MSDOS_SB(parent->d_sb)->nls_io;
@@ -162,8 +159,7 @@ static int vfat_cmpi(const struct dentry *parent, const struct inode *pinode,
/*
* Case sensitive compare of two vfat names.
*/
-static int vfat_cmp(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int vfat_cmp(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
unsigned int alen, blen;
diff --git a/fs/file_table.c b/fs/file_table.c
index 485dc0e..08e719b 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -227,7 +227,7 @@ static void __fput(struct file *file)
{
struct dentry *dentry = file->f_path.dentry;
struct vfsmount *mnt = file->f_path.mnt;
- struct inode *inode = dentry->d_inode;
+ struct inode *inode = file->f_inode;
might_sleep();
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 35f2810..5c121fe 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -548,8 +548,7 @@ static void fuse_aio_complete(struct fuse_io_priv *io, int err, ssize_t pos)
res = io->bytes < 0 ? io->size : io->bytes;
if (!is_sync_kiocb(io->iocb)) {
- struct path *path = &io->iocb->ki_filp->f_path;
- struct inode *inode = path->dentry->d_inode;
+ struct inode *inode = file_inode(io->iocb->ki_filp);
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_inode *fi = get_fuse_inode(inode);
diff --git a/fs/gfs2/dentry.c b/fs/gfs2/dentry.c
index 4fddb3c..f2448ab 100644
--- a/fs/gfs2/dentry.c
+++ b/fs/gfs2/dentry.c
@@ -109,8 +109,7 @@ fail:
return 0;
}
-static int gfs2_dhash(const struct dentry *dentry, const struct inode *inode,
- struct qstr *str)
+static int gfs2_dhash(const struct dentry *dentry, struct qstr *str)
{
str->hash = gfs2_disk_hash(str->name, str->len);
return 0;
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index f99f9e8..72c3866 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -912,7 +912,7 @@ out_uninit:
* cluster; until we do, disable leases (by just returning -EINVAL),
* unless the administrator has requested purely local locking.
*
- * Locking: called under lock_flocks
+ * Locking: called under i_lock
*
* Returns: errno
*/
diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h
index a73b118..0524cda 100644
--- a/fs/hfs/hfs_fs.h
+++ b/fs/hfs/hfs_fs.h
@@ -229,13 +229,10 @@ extern int hfs_part_find(struct super_block *, sector_t *, sector_t *);
/* string.c */
extern const struct dentry_operations hfs_dentry_operations;
-extern int hfs_hash_dentry(const struct dentry *, const struct inode *,
- struct qstr *);
+extern int hfs_hash_dentry(const struct dentry *, struct qstr *);
extern int hfs_strcmp(const unsigned char *, unsigned int,
const unsigned char *, unsigned int);
-extern int hfs_compare_dentry(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+extern int hfs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
/* trans.c */
diff --git a/fs/hfs/string.c b/fs/hfs/string.c
index 495a976..85b610c 100644
--- a/fs/hfs/string.c
+++ b/fs/hfs/string.c
@@ -51,8 +51,7 @@ static unsigned char caseorder[256] = {
/*
* Hash a string to an integer in a case-independent way
*/
-int hfs_hash_dentry(const struct dentry *dentry, const struct inode *inode,
- struct qstr *this)
+int hfs_hash_dentry(const struct dentry *dentry, struct qstr *this)
{
const unsigned char *name = this->name;
unsigned int hash, len = this->len;
@@ -93,8 +92,7 @@ int hfs_strcmp(const unsigned char *s1, unsigned int len1,
* Test for equality of two strings in the HFS filename character ordering.
* return 1 on failure and 0 on success
*/
-int hfs_compare_dentry(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+int hfs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
const unsigned char *n1, *n2;
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index 60b0a33..ede7931 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -495,11 +495,8 @@ int hfsplus_uni2asc(struct super_block *,
const struct hfsplus_unistr *, char *, int *);
int hfsplus_asc2uni(struct super_block *,
struct hfsplus_unistr *, int, const char *, int);
-int hfsplus_hash_dentry(const struct dentry *dentry,
- const struct inode *inode, struct qstr *str);
-int hfsplus_compare_dentry(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str);
+int hfsplus_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
/* wrapper.c */
diff --git a/fs/hfsplus/unicode.c b/fs/hfsplus/unicode.c
index 2c2e47d..e8ef121 100644
--- a/fs/hfsplus/unicode.c
+++ b/fs/hfsplus/unicode.c
@@ -334,8 +334,7 @@ int hfsplus_asc2uni(struct super_block *sb,
* Composed unicode characters are decomposed and case-folding is performed
* if the appropriate bits are (un)set on the superblock.
*/
-int hfsplus_hash_dentry(const struct dentry *dentry, const struct inode *inode,
- struct qstr *str)
+int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str)
{
struct super_block *sb = dentry->d_sb;
const char *astr;
@@ -386,9 +385,7 @@ int hfsplus_hash_dentry(const struct dentry *dentry, const struct inode *inode,
* Composed unicode characters are decomposed and case-folding is performed
* if the appropriate bits are (un)set on the superblock.
*/
-int hfsplus_compare_dentry(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+int hfsplus_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
struct super_block *sb = parent->d_sb;
diff --git a/fs/hpfs/dentry.c b/fs/hpfs/dentry.c
index 05d4816..fa27980 100644
--- a/fs/hpfs/dentry.c
+++ b/fs/hpfs/dentry.c
@@ -12,8 +12,7 @@
* Note: the dentry argument is the parent dentry.
*/
-static int hpfs_hash_dentry(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+static int hpfs_hash_dentry(const struct dentry *dentry, struct qstr *qstr)
{
unsigned long hash;
int i;
@@ -35,9 +34,7 @@ static int hpfs_hash_dentry(const struct dentry *dentry, const struct inode *ino
return 0;
}
-static int hpfs_compare_dentry(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int hpfs_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
unsigned al = len;
diff --git a/fs/inode.c b/fs/inode.c
index 00d5fc3..d6dfb09 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -333,8 +333,10 @@ EXPORT_SYMBOL(set_nlink);
*/
void inc_nlink(struct inode *inode)
{
- if (WARN_ON(inode->i_nlink == 0))
+ if (unlikely(inode->i_nlink == 0)) {
+ WARN_ON(!(inode->i_state & I_LINKABLE));
atomic_long_dec(&inode->i_sb->s_remove_count);
+ }
inode->__i_nlink++;
}
diff --git a/fs/internal.h b/fs/internal.h
index 6812158..7c5f01c 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -96,11 +96,12 @@ struct open_flags {
umode_t mode;
int acc_mode;
int intent;
+ int lookup_flags;
};
extern struct file *do_filp_open(int dfd, struct filename *pathname,
- const struct open_flags *op, int flags);
+ const struct open_flags *op);
extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
- const char *, const struct open_flags *, int lookup_flags);
+ const char *, const struct open_flags *);
extern long do_handle_open(int mountdirfd,
struct file_handle __user *ufh, int open_flag);
@@ -130,6 +131,7 @@ extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
* read_write.c
*/
extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *);
+extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
/*
* splice.c
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index d9b8aeb..c348d6d 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -28,31 +28,23 @@
#define BEQUIET
-static int isofs_hashi(const struct dentry *parent, const struct inode *inode,
- struct qstr *qstr);
-static int isofs_hash(const struct dentry *parent, const struct inode *inode,
- struct qstr *qstr);
+static int isofs_hashi(const struct dentry *parent, struct qstr *qstr);
+static int isofs_hash(const struct dentry *parent, struct qstr *qstr);
static int isofs_dentry_cmpi(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+ const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
static int isofs_dentry_cmp(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+ const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
#ifdef CONFIG_JOLIET
-static int isofs_hashi_ms(const struct dentry *parent, const struct inode *inode,
- struct qstr *qstr);
-static int isofs_hash_ms(const struct dentry *parent, const struct inode *inode,
- struct qstr *qstr);
+static int isofs_hashi_ms(const struct dentry *parent, struct qstr *qstr);
+static int isofs_hash_ms(const struct dentry *parent, struct qstr *qstr);
static int isofs_dentry_cmpi_ms(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+ const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
static int isofs_dentry_cmp_ms(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+ const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name);
#endif
@@ -265,30 +257,26 @@ static int isofs_dentry_cmp_common(
}
static int
-isofs_hash(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+isofs_hash(const struct dentry *dentry, struct qstr *qstr)
{
return isofs_hash_common(dentry, qstr, 0);
}
static int
-isofs_hashi(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+isofs_hashi(const struct dentry *dentry, struct qstr *qstr)
{
return isofs_hashi_common(dentry, qstr, 0);
}
static int
-isofs_dentry_cmp(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+isofs_dentry_cmp(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return isofs_dentry_cmp_common(len, str, name, 0, 0);
}
static int
-isofs_dentry_cmpi(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+isofs_dentry_cmpi(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return isofs_dentry_cmp_common(len, str, name, 0, 1);
@@ -296,30 +284,26 @@ isofs_dentry_cmpi(const struct dentry *parent, const struct inode *pinode,
#ifdef CONFIG_JOLIET
static int
-isofs_hash_ms(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+isofs_hash_ms(const struct dentry *dentry, struct qstr *qstr)
{
return isofs_hash_common(dentry, qstr, 1);
}
static int
-isofs_hashi_ms(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+isofs_hashi_ms(const struct dentry *dentry, struct qstr *qstr)
{
return isofs_hashi_common(dentry, qstr, 1);
}
static int
-isofs_dentry_cmp_ms(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+isofs_dentry_cmp_ms(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return isofs_dentry_cmp_common(len, str, name, 1, 0);
}
static int
-isofs_dentry_cmpi_ms(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+isofs_dentry_cmpi_ms(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
return isofs_dentry_cmp_common(len, str, name, 1, 1);
diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c
index c167028..9529564 100644
--- a/fs/isofs/namei.c
+++ b/fs/isofs/namei.c
@@ -37,8 +37,7 @@ isofs_cmp(struct dentry *dentry, const char *compare, int dlen)
qstr.name = compare;
qstr.len = dlen;
- return dentry->d_op->d_compare(NULL, NULL, NULL, NULL,
- dentry->d_name.len, dentry->d_name.name, &qstr);
+ return dentry->d_op->d_compare(NULL, NULL, dentry->d_name.len, dentry->d_name.name, &qstr);
}
/*
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 89186b7..8b19027 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1538,8 +1538,7 @@ const struct file_operations jfs_dir_operations = {
.llseek = generic_file_llseek,
};
-static int jfs_ci_hash(const struct dentry *dir, const struct inode *inode,
- struct qstr *this)
+static int jfs_ci_hash(const struct dentry *dir, struct qstr *this)
{
unsigned long hash;
int i;
@@ -1552,9 +1551,7 @@ static int jfs_ci_hash(const struct dentry *dir, const struct inode *inode,
return 0;
}
-static int jfs_ci_compare(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int jfs_ci_compare(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
int i, result = 1;
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index e703318..067778b 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -276,7 +276,7 @@ static int nlmsvc_unlink_block(struct nlm_block *block)
dprintk("lockd: unlinking block %p...\n", block);
/* Remove block from list */
- status = posix_unblock_lock(block->b_file->f_file, &block->b_call->a_args.lock.fl);
+ status = posix_unblock_lock(&block->b_call->a_args.lock.fl);
nlmsvc_remove_block(block);
return status;
}
@@ -744,8 +744,20 @@ static int nlmsvc_same_owner(struct file_lock *fl1, struct file_lock *fl2)
return fl1->fl_owner == fl2->fl_owner && fl1->fl_pid == fl2->fl_pid;
}
+/*
+ * Since NLM uses two "keys" for tracking locks, we need to hash them down
+ * to one for the blocked_hash. Here, we're just xor'ing the host address
+ * with the pid in order to create a key value for picking a hash bucket.
+ */
+static unsigned long
+nlmsvc_owner_key(struct file_lock *fl)
+{
+ return (unsigned long)fl->fl_owner ^ (unsigned long)fl->fl_pid;
+}
+
const struct lock_manager_operations nlmsvc_lock_operations = {
.lm_compare_owner = nlmsvc_same_owner,
+ .lm_owner_key = nlmsvc_owner_key,
.lm_notify = nlmsvc_notify_blocked,
.lm_grant = nlmsvc_grant_deferred,
};
diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c
index 97e8741..dc5c759 100644
--- a/fs/lockd/svcsubs.c
+++ b/fs/lockd/svcsubs.c
@@ -169,7 +169,7 @@ nlm_traverse_locks(struct nlm_host *host, struct nlm_file *file,
again:
file->f_locks = 0;
- lock_flocks(); /* protects i_flock list */
+ spin_lock(&inode->i_lock);
for (fl = inode->i_flock; fl; fl = fl->fl_next) {
if (fl->fl_lmops != &nlmsvc_lock_operations)
continue;
@@ -181,7 +181,7 @@ again:
if (match(lockhost, host)) {
struct file_lock lock = *fl;
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
lock.fl_type = F_UNLCK;
lock.fl_start = 0;
lock.fl_end = OFFSET_MAX;
@@ -193,7 +193,7 @@ again:
goto again;
}
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
return 0;
}
@@ -228,14 +228,14 @@ nlm_file_inuse(struct nlm_file *file)
if (file->f_count || !list_empty(&file->f_blocks) || file->f_shares)
return 1;
- lock_flocks();
+ spin_lock(&inode->i_lock);
for (fl = inode->i_flock; fl; fl = fl->fl_next) {
if (fl->fl_lmops == &nlmsvc_lock_operations) {
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
return 1;
}
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
file->f_locks = 0;
return 0;
}
diff --git a/fs/locks.c b/fs/locks.c
index cb424a4..04e2c1f 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -126,6 +126,7 @@
#include <linux/time.h>
#include <linux/rcupdate.h>
#include <linux/pid_namespace.h>
+#include <linux/hashtable.h>
#include <asm/uaccess.h>
@@ -153,30 +154,51 @@ int lease_break_time = 45;
#define for_each_lock(inode, lockp) \
for (lockp = &inode->i_flock; *lockp != NULL; lockp = &(*lockp)->fl_next)
-static LIST_HEAD(file_lock_list);
-static LIST_HEAD(blocked_list);
+/*
+ * The global file_lock_list is only used for displaying /proc/locks. Protected
+ * by the file_lock_lock.
+ */
+static HLIST_HEAD(file_lock_list);
static DEFINE_SPINLOCK(file_lock_lock);
/*
- * Protects the two list heads above, plus the inode->i_flock list
+ * The blocked_hash is used to find POSIX lock loops for deadlock detection.
+ * It is protected by blocked_lock_lock.
+ *
+ * We hash locks by lockowner in order to optimize searching for the lock a
+ * particular lockowner is waiting on.
+ *
+ * FIXME: make this value scale via some heuristic? We generally will want more
+ * buckets when we have more lockowners holding locks, but that's a little
+ * difficult to determine without knowing what the workload will look like.
*/
-void lock_flocks(void)
-{
- spin_lock(&file_lock_lock);
-}
-EXPORT_SYMBOL_GPL(lock_flocks);
+#define BLOCKED_HASH_BITS 7
+static DEFINE_HASHTABLE(blocked_hash, BLOCKED_HASH_BITS);
-void unlock_flocks(void)
-{
- spin_unlock(&file_lock_lock);
-}
-EXPORT_SYMBOL_GPL(unlock_flocks);
+/*
+ * This lock protects the blocked_hash. Generally, if you're accessing it, you
+ * want to be holding this lock.
+ *
+ * In addition, it also protects the fl->fl_block list, and the fl->fl_next
+ * pointer for file_lock structures that are acting as lock requests (in
+ * contrast to those that are acting as records of acquired locks).
+ *
+ * Note that when we acquire this lock in order to change the above fields,
+ * we often hold the i_lock as well. In certain cases, when reading the fields
+ * protected by this lock, we can skip acquiring it iff we already hold the
+ * i_lock.
+ *
+ * In particular, adding an entry to the fl_block list requires that you hold
+ * both the i_lock and the blocked_lock_lock (acquired in that order). Deleting
+ * an entry from the list however only requires the file_lock_lock.
+ */
+static DEFINE_SPINLOCK(blocked_lock_lock);
static struct kmem_cache *filelock_cache __read_mostly;
static void locks_init_lock_heads(struct file_lock *fl)
{
- INIT_LIST_HEAD(&fl->fl_link);
+ INIT_HLIST_NODE(&fl->fl_link);
INIT_LIST_HEAD(&fl->fl_block);
init_waitqueue_head(&fl->fl_wait);
}
@@ -210,7 +232,7 @@ void locks_free_lock(struct file_lock *fl)
{
BUG_ON(waitqueue_active(&fl->fl_wait));
BUG_ON(!list_empty(&fl->fl_block));
- BUG_ON(!list_empty(&fl->fl_link));
+ BUG_ON(!hlist_unhashed(&fl->fl_link));
locks_release_private(fl);
kmem_cache_free(filelock_cache, fl);
@@ -484,47 +506,108 @@ static int posix_same_owner(struct file_lock *fl1, struct file_lock *fl2)
return fl1->fl_owner == fl2->fl_owner;
}
+static inline void
+locks_insert_global_locks(struct file_lock *fl)
+{
+ spin_lock(&file_lock_lock);
+ hlist_add_head(&fl->fl_link, &file_lock_list);
+ spin_unlock(&file_lock_lock);
+}
+
+static inline void
+locks_delete_global_locks(struct file_lock *fl)
+{
+ spin_lock(&file_lock_lock);
+ hlist_del_init(&fl->fl_link);
+ spin_unlock(&file_lock_lock);
+}
+
+static unsigned long
+posix_owner_key(struct file_lock *fl)
+{
+ if (fl->fl_lmops && fl->fl_lmops->lm_owner_key)
+ return fl->fl_lmops->lm_owner_key(fl);
+ return (unsigned long)fl->fl_owner;
+}
+
+static inline void
+locks_insert_global_blocked(struct file_lock *waiter)
+{
+ hash_add(blocked_hash, &waiter->fl_link, posix_owner_key(waiter));
+}
+
+static inline void
+locks_delete_global_blocked(struct file_lock *waiter)
+{
+ hash_del(&waiter->fl_link);
+}
+
/* Remove waiter from blocker's block list.
* When blocker ends up pointing to itself then the list is empty.
+ *
+ * Must be called with blocked_lock_lock held.
*/
static void __locks_delete_block(struct file_lock *waiter)
{
+ locks_delete_global_blocked(waiter);
list_del_init(&waiter->fl_block);
- list_del_init(&waiter->fl_link);
waiter->fl_next = NULL;
}
-/*
- */
-void locks_delete_block(struct file_lock *waiter)
+static void locks_delete_block(struct file_lock *waiter)
{
- lock_flocks();
+ spin_lock(&blocked_lock_lock);
__locks_delete_block(waiter);
- unlock_flocks();
+ spin_unlock(&blocked_lock_lock);
}
-EXPORT_SYMBOL(locks_delete_block);
/* Insert waiter into blocker's block list.
* We use a circular list so that processes can be easily woken up in
* the order they blocked. The documentation doesn't require this but
* it seems like the reasonable thing to do.
+ *
+ * Must be called with both the i_lock and blocked_lock_lock held. The fl_block
+ * list itself is protected by the file_lock_list, but by ensuring that the
+ * i_lock is also held on insertions we can avoid taking the blocked_lock_lock
+ * in some cases when we see that the fl_block list is empty.
*/
-static void locks_insert_block(struct file_lock *blocker,
- struct file_lock *waiter)
+static void __locks_insert_block(struct file_lock *blocker,
+ struct file_lock *waiter)
{
BUG_ON(!list_empty(&waiter->fl_block));
- list_add_tail(&waiter->fl_block, &blocker->fl_block);
waiter->fl_next = blocker;
+ list_add_tail(&waiter->fl_block, &blocker->fl_block);
if (IS_POSIX(blocker))
- list_add(&waiter->fl_link, &blocked_list);
+ locks_insert_global_blocked(waiter);
}
-/* Wake up processes blocked waiting for blocker.
- * If told to wait then schedule the processes until the block list
- * is empty, otherwise empty the block list ourselves.
+/* Must be called with i_lock held. */
+static void locks_insert_block(struct file_lock *blocker,
+ struct file_lock *waiter)
+{
+ spin_lock(&blocked_lock_lock);
+ __locks_insert_block(blocker, waiter);
+ spin_unlock(&blocked_lock_lock);
+}
+
+/*
+ * Wake up processes blocked waiting for blocker.
+ *
+ * Must be called with the inode->i_lock held!
*/
static void locks_wake_up_blocks(struct file_lock *blocker)
{
+ /*
+ * Avoid taking global lock if list is empty. This is safe since new
+ * blocked requests are only added to the list under the i_lock, and
+ * the i_lock is always held here. Note that removal from the fl_block
+ * list does not require the i_lock, so we must recheck list_empty()
+ * after acquiring the blocked_lock_lock.
+ */
+ if (list_empty(&blocker->fl_block))
+ return;
+
+ spin_lock(&blocked_lock_lock);
while (!list_empty(&blocker->fl_block)) {
struct file_lock *waiter;
@@ -536,20 +619,23 @@ static void locks_wake_up_blocks(struct file_lock *blocker)
else
wake_up(&waiter->fl_wait);
}
+ spin_unlock(&blocked_lock_lock);
}
/* Insert file lock fl into an inode's lock list at the position indicated
* by pos. At the same time add the lock to the global file lock list.
+ *
+ * Must be called with the i_lock held!
*/
static void locks_insert_lock(struct file_lock **pos, struct file_lock *fl)
{
- list_add(&fl->fl_link, &file_lock_list);
-
fl->fl_nspid = get_pid(task_tgid(current));
/* insert into file's list */
fl->fl_next = *pos;
*pos = fl;
+
+ locks_insert_global_locks(fl);
}
/*
@@ -557,14 +643,17 @@ static void locks_insert_lock(struct file_lock **pos, struct file_lock *fl)
* Wake up processes that are blocked waiting for this lock,
* notify the FS that the lock has been cleared and
* finally free the lock.
+ *
+ * Must be called with the i_lock held!
*/
static void locks_delete_lock(struct file_lock **thisfl_p)
{
struct file_lock *fl = *thisfl_p;
+ locks_delete_global_locks(fl);
+
*thisfl_p = fl->fl_next;
fl->fl_next = NULL;
- list_del_init(&fl->fl_link);
if (fl->fl_nspid) {
put_pid(fl->fl_nspid);
@@ -625,8 +714,9 @@ void
posix_test_lock(struct file *filp, struct file_lock *fl)
{
struct file_lock *cfl;
+ struct inode *inode = file_inode(filp);
- lock_flocks();
+ spin_lock(&inode->i_lock);
for (cfl = file_inode(filp)->i_flock; cfl; cfl = cfl->fl_next) {
if (!IS_POSIX(cfl))
continue;
@@ -639,7 +729,7 @@ posix_test_lock(struct file *filp, struct file_lock *fl)
fl->fl_pid = pid_vnr(cfl->fl_nspid);
} else
fl->fl_type = F_UNLCK;
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
return;
}
EXPORT_SYMBOL(posix_test_lock);
@@ -676,13 +766,14 @@ static struct file_lock *what_owner_is_waiting_for(struct file_lock *block_fl)
{
struct file_lock *fl;
- list_for_each_entry(fl, &blocked_list, fl_link) {
+ hash_for_each_possible(blocked_hash, fl, fl_link, posix_owner_key(block_fl)) {
if (posix_same_owner(fl, block_fl))
return fl->fl_next;
}
return NULL;
}
+/* Must be called with the blocked_lock_lock held! */
static int posix_locks_deadlock(struct file_lock *caller_fl,
struct file_lock *block_fl)
{
@@ -718,7 +809,7 @@ static int flock_lock_file(struct file *filp, struct file_lock *request)
return -ENOMEM;
}
- lock_flocks();
+ spin_lock(&inode->i_lock);
if (request->fl_flags & FL_ACCESS)
goto find_conflict;
@@ -748,9 +839,9 @@ static int flock_lock_file(struct file *filp, struct file_lock *request)
* give it the opportunity to lock the file.
*/
if (found) {
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
cond_resched();
- lock_flocks();
+ spin_lock(&inode->i_lock);
}
find_conflict:
@@ -777,7 +868,7 @@ find_conflict:
error = 0;
out:
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
if (new_fl)
locks_free_lock(new_fl);
return error;
@@ -791,7 +882,8 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
struct file_lock *left = NULL;
struct file_lock *right = NULL;
struct file_lock **before;
- int error, added = 0;
+ int error;
+ bool added = false;
/*
* We may need two file_lock structures for this operation,
@@ -806,7 +898,12 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
new_fl2 = locks_alloc_lock();
}
- lock_flocks();
+ spin_lock(&inode->i_lock);
+ /*
+ * New lock request. Walk all POSIX locks and look for conflicts. If
+ * there are any, either return error or put the request on the
+ * blocker's list of waiters and the global blocked_hash.
+ */
if (request->fl_type != F_UNLCK) {
for_each_lock(inode, before) {
fl = *before;
@@ -819,11 +916,17 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
error = -EAGAIN;
if (!(request->fl_flags & FL_SLEEP))
goto out;
+ /*
+ * Deadlock detection and insertion into the blocked
+ * locks list must be done while holding the same lock!
+ */
error = -EDEADLK;
- if (posix_locks_deadlock(request, fl))
- goto out;
- error = FILE_LOCK_DEFERRED;
- locks_insert_block(fl, request);
+ spin_lock(&blocked_lock_lock);
+ if (likely(!posix_locks_deadlock(request, fl))) {
+ error = FILE_LOCK_DEFERRED;
+ __locks_insert_block(fl, request);
+ }
+ spin_unlock(&blocked_lock_lock);
goto out;
}
}
@@ -845,7 +948,7 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
before = &fl->fl_next;
}
- /* Process locks with this owner. */
+ /* Process locks with this owner. */
while ((fl = *before) && posix_same_owner(request, fl)) {
/* Detect adjacent or overlapping regions (if same lock type)
*/
@@ -880,7 +983,7 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
continue;
}
request = fl;
- added = 1;
+ added = true;
}
else {
/* Processing for different lock types is a bit
@@ -891,7 +994,7 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
if (fl->fl_start > request->fl_end)
break;
if (request->fl_type == F_UNLCK)
- added = 1;
+ added = true;
if (fl->fl_start < request->fl_start)
left = fl;
/* If the next lock in the list has a higher end
@@ -921,7 +1024,7 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
locks_release_private(fl);
locks_copy_private(fl, request);
request = fl;
- added = 1;
+ added = true;
}
}
/* Go on to next lock.
@@ -931,10 +1034,9 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
}
/*
- * The above code only modifies existing locks in case of
- * merging or replacing. If new lock(s) need to be inserted
- * all modifications are done bellow this, so it's safe yet to
- * bail out.
+ * The above code only modifies existing locks in case of merging or
+ * replacing. If new lock(s) need to be inserted all modifications are
+ * done below this, so it's safe yet to bail out.
*/
error = -ENOLCK; /* "no luck" */
if (right && left == right && !new_fl2)
@@ -974,7 +1076,7 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
locks_wake_up_blocks(left);
}
out:
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
/*
* Free any unused locks.
*/
@@ -1049,14 +1151,14 @@ int locks_mandatory_locked(struct inode *inode)
/*
* Search the lock list for this inode for any POSIX locks.
*/
- lock_flocks();
+ spin_lock(&inode->i_lock);
for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
if (!IS_POSIX(fl))
continue;
if (fl->fl_owner != owner)
break;
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
return fl ? -EAGAIN : 0;
}
@@ -1199,7 +1301,7 @@ int __break_lease(struct inode *inode, unsigned int mode)
if (IS_ERR(new_fl))
return PTR_ERR(new_fl);
- lock_flocks();
+ spin_lock(&inode->i_lock);
time_out_leases(inode);
@@ -1249,11 +1351,11 @@ restart:
break_time++;
}
locks_insert_block(flock, new_fl);
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
error = wait_event_interruptible_timeout(new_fl->fl_wait,
!new_fl->fl_next, break_time);
- lock_flocks();
- __locks_delete_block(new_fl);
+ spin_lock(&inode->i_lock);
+ locks_delete_block(new_fl);
if (error >= 0) {
if (error == 0)
time_out_leases(inode);
@@ -1270,7 +1372,7 @@ restart:
}
out:
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
locks_free_lock(new_fl);
return error;
}
@@ -1323,9 +1425,10 @@ EXPORT_SYMBOL(lease_get_mtime);
int fcntl_getlease(struct file *filp)
{
struct file_lock *fl;
+ struct inode *inode = file_inode(filp);
int type = F_UNLCK;
- lock_flocks();
+ spin_lock(&inode->i_lock);
time_out_leases(file_inode(filp));
for (fl = file_inode(filp)->i_flock; fl && IS_LEASE(fl);
fl = fl->fl_next) {
@@ -1334,11 +1437,11 @@ int fcntl_getlease(struct file *filp)
break;
}
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
return type;
}
-int generic_add_lease(struct file *filp, long arg, struct file_lock **flp)
+static int generic_add_lease(struct file *filp, long arg, struct file_lock **flp)
{
struct file_lock *fl, **before, **my_before = NULL, *lease;
struct dentry *dentry = filp->f_path.dentry;
@@ -1403,7 +1506,7 @@ out:
return error;
}
-int generic_delete_lease(struct file *filp, struct file_lock **flp)
+static int generic_delete_lease(struct file *filp, struct file_lock **flp)
{
struct file_lock *fl, **before;
struct dentry *dentry = filp->f_path.dentry;
@@ -1428,7 +1531,7 @@ int generic_delete_lease(struct file *filp, struct file_lock **flp)
* The (input) flp->fl_lmops->lm_break function is required
* by break_lease().
*
- * Called with file_lock_lock held.
+ * Called with inode->i_lock held.
*/
int generic_setlease(struct file *filp, long arg, struct file_lock **flp)
{
@@ -1497,11 +1600,12 @@ static int __vfs_setlease(struct file *filp, long arg, struct file_lock **lease)
int vfs_setlease(struct file *filp, long arg, struct file_lock **lease)
{
+ struct inode *inode = file_inode(filp);
int error;
- lock_flocks();
+ spin_lock(&inode->i_lock);
error = __vfs_setlease(filp, arg, lease);
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
return error;
}
@@ -1519,6 +1623,7 @@ static int do_fcntl_delete_lease(struct file *filp)
static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg)
{
struct file_lock *fl, *ret;
+ struct inode *inode = file_inode(filp);
struct fasync_struct *new;
int error;
@@ -1532,10 +1637,10 @@ static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg)
return -ENOMEM;
}
ret = fl;
- lock_flocks();
+ spin_lock(&inode->i_lock);
error = __vfs_setlease(filp, arg, &ret);
if (error) {
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
locks_free_lock(fl);
goto out_free_fasync;
}
@@ -1552,7 +1657,7 @@ static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg)
new = NULL;
error = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0);
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
out_free_fasync:
if (new)
@@ -2076,7 +2181,7 @@ void locks_remove_flock(struct file *filp)
fl.fl_ops->fl_release_private(&fl);
}
- lock_flocks();
+ spin_lock(&inode->i_lock);
before = &inode->i_flock;
while ((fl = *before) != NULL) {
@@ -2094,30 +2199,28 @@ void locks_remove_flock(struct file *filp)
}
before = &fl->fl_next;
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
}
/**
* posix_unblock_lock - stop waiting for a file lock
- * @filp: how the file was opened
* @waiter: the lock which was waiting
*
* lockd needs to block waiting for locks.
*/
int
-posix_unblock_lock(struct file *filp, struct file_lock *waiter)
+posix_unblock_lock(struct file_lock *waiter)
{
int status = 0;
- lock_flocks();
+ spin_lock(&blocked_lock_lock);
if (waiter->fl_next)
__locks_delete_block(waiter);
else
status = -ENOENT;
- unlock_flocks();
+ spin_unlock(&blocked_lock_lock);
return status;
}
-
EXPORT_SYMBOL(posix_unblock_lock);
/**
@@ -2215,7 +2318,7 @@ static int locks_show(struct seq_file *f, void *v)
{
struct file_lock *fl, *bfl;
- fl = list_entry(v, struct file_lock, fl_link);
+ fl = hlist_entry(v, struct file_lock, fl_link);
lock_get_status(f, fl, *((loff_t *)f->private), "");
@@ -2229,21 +2332,23 @@ static void *locks_start(struct seq_file *f, loff_t *pos)
{
loff_t *p = f->private;
- lock_flocks();
+ spin_lock(&file_lock_lock);
+ spin_lock(&blocked_lock_lock);
*p = (*pos + 1);
- return seq_list_start(&file_lock_list, *pos);
+ return seq_hlist_start(&file_lock_list, *pos);
}
static void *locks_next(struct seq_file *f, void *v, loff_t *pos)
{
loff_t *p = f->private;
++*p;
- return seq_list_next(v, &file_lock_list, pos);
+ return seq_hlist_next(v, &file_lock_list, pos);
}
static void locks_stop(struct seq_file *f, void *v)
{
- unlock_flocks();
+ spin_unlock(&blocked_lock_lock);
+ spin_unlock(&file_lock_lock);
}
static const struct seq_operations locks_seq_operations = {
@@ -2290,7 +2395,8 @@ int lock_may_read(struct inode *inode, loff_t start, unsigned long len)
{
struct file_lock *fl;
int result = 1;
- lock_flocks();
+
+ spin_lock(&inode->i_lock);
for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
if (IS_POSIX(fl)) {
if (fl->fl_type == F_RDLCK)
@@ -2307,7 +2413,7 @@ int lock_may_read(struct inode *inode, loff_t start, unsigned long len)
result = 0;
break;
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
return result;
}
@@ -2330,7 +2436,8 @@ int lock_may_write(struct inode *inode, loff_t start, unsigned long len)
{
struct file_lock *fl;
int result = 1;
- lock_flocks();
+
+ spin_lock(&inode->i_lock);
for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
if (IS_POSIX(fl)) {
if ((fl->fl_end < start) || (fl->fl_start > (start + len)))
@@ -2345,7 +2452,7 @@ int lock_may_write(struct inode *inode, loff_t start, unsigned long len)
result = 0;
break;
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
return result;
}
diff --git a/fs/minix/dir.c b/fs/minix/dir.c
index 08c4429..dfaf6fa 100644
--- a/fs/minix/dir.c
+++ b/fs/minix/dir.c
@@ -93,7 +93,7 @@ static int minix_readdir(struct file *file, struct dir_context *ctx)
unsigned offset;
unsigned long n;
- ctx->pos = pos = (pos + chunk_size-1) & ~(chunk_size-1);
+ ctx->pos = pos = ALIGN(pos, chunk_size);
if (pos >= inode->i_size)
return 0;
diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index 0db73d9..cd950e2 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -54,6 +54,18 @@ static int minix_mknod(struct inode * dir, struct dentry *dentry, umode_t mode,
return error;
}
+static int minix_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ int error;
+ struct inode *inode = minix_new_inode(dir, mode, &error);
+ if (inode) {
+ minix_set_inode(inode, 0);
+ mark_inode_dirty(inode);
+ d_tmpfile(dentry, inode);
+ }
+ return error;
+}
+
static int minix_create(struct inode *dir, struct dentry *dentry, umode_t mode,
bool excl)
{
@@ -254,4 +266,5 @@ const struct inode_operations minix_dir_inode_operations = {
.mknod = minix_mknod,
.rename = minix_rename,
.getattr = minix_getattr,
+ .tmpfile = minix_tmpfile,
};
diff --git a/fs/namei.c b/fs/namei.c
index 9ed9361..b2beee7 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1352,7 +1352,7 @@ static int lookup_fast(struct nameidata *nd,
*/
if (nd->flags & LOOKUP_RCU) {
unsigned seq;
- dentry = __d_lookup_rcu(parent, &nd->last, &seq, nd->inode);
+ dentry = __d_lookup_rcu(parent, &nd->last, &seq);
if (!dentry)
goto unlazy;
@@ -1787,8 +1787,7 @@ static int link_path_walk(const char *name, struct nameidata *nd)
struct dentry *parent = nd->path.dentry;
nd->flags &= ~LOOKUP_JUMPED;
if (unlikely(parent->d_flags & DCACHE_OP_HASH)) {
- err = parent->d_op->d_hash(parent, nd->inode,
- &this);
+ err = parent->d_op->d_hash(parent, &this);
if (err < 0)
break;
}
@@ -2121,7 +2120,7 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
* to use its own hash..
*/
if (base->d_flags & DCACHE_OP_HASH) {
- int err = base->d_op->d_hash(base, base->d_inode, &this);
+ int err = base->d_op->d_hash(base, &this);
if (err < 0)
return ERR_PTR(err);
}
@@ -2690,28 +2689,10 @@ static int do_last(struct nameidata *nd, struct path *path,
nd->flags &= ~LOOKUP_PARENT;
nd->flags |= op->intent;
- switch (nd->last_type) {
- case LAST_DOTDOT:
- case LAST_DOT:
+ if (nd->last_type != LAST_NORM) {
error = handle_dots(nd, nd->last_type);
if (error)
return error;
- /* fallthrough */
- case LAST_ROOT:
- error = complete_walk(nd);
- if (error)
- return error;
- audit_inode(name, nd->path.dentry, 0);
- if (open_flag & O_CREAT) {
- error = -EISDIR;
- goto out;
- }
- goto finish_open;
- case LAST_BIND:
- error = complete_walk(nd);
- if (error)
- return error;
- audit_inode(name, dir, 0);
goto finish_open;
}
@@ -2841,19 +2822,19 @@ finish_lookup:
}
nd->inode = inode;
/* Why this, you ask? _Now_ we might have grown LOOKUP_JUMPED... */
+finish_open:
error = complete_walk(nd);
if (error) {
path_put(&save_parent);
return error;
}
+ audit_inode(name, nd->path.dentry, 0);
error = -EISDIR;
if ((open_flag & O_CREAT) && S_ISDIR(nd->inode->i_mode))
goto out;
error = -ENOTDIR;
if ((nd->flags & LOOKUP_DIRECTORY) && !can_lookup(nd->inode))
goto out;
- audit_inode(name, nd->path.dentry, 0);
-finish_open:
if (!S_ISREG(nd->inode->i_mode))
will_truncate = false;
@@ -2920,6 +2901,67 @@ stale_open:
goto retry_lookup;
}
+static int do_tmpfile(int dfd, struct filename *pathname,
+ struct nameidata *nd, int flags,
+ const struct open_flags *op,
+ struct file *file, int *opened)
+{
+ static const struct qstr name = QSTR_INIT("/", 1);
+ struct dentry *dentry, *child;
+ struct inode *dir;
+ int error = path_lookupat(dfd, pathname->name,
+ flags | LOOKUP_DIRECTORY, nd);
+ if (unlikely(error))
+ return error;
+ error = mnt_want_write(nd->path.mnt);
+ if (unlikely(error))
+ goto out;
+ /* we want directory to be writable */
+ error = inode_permission(nd->inode, MAY_WRITE | MAY_EXEC);
+ if (error)
+ goto out2;
+ dentry = nd->path.dentry;
+ dir = dentry->d_inode;
+ if (!dir->i_op->tmpfile) {
+ error = -EOPNOTSUPP;
+ goto out2;
+ }
+ child = d_alloc(dentry, &name);
+ if (unlikely(!child)) {
+ error = -ENOMEM;
+ goto out2;
+ }
+ nd->flags &= ~LOOKUP_DIRECTORY;
+ nd->flags |= op->intent;
+ dput(nd->path.dentry);
+ nd->path.dentry = child;
+ error = dir->i_op->tmpfile(dir, nd->path.dentry, op->mode);
+ if (error)
+ goto out2;
+ audit_inode(pathname, nd->path.dentry, 0);
+ error = may_open(&nd->path, op->acc_mode, op->open_flag);
+ if (error)
+ goto out2;
+ file->f_path.mnt = nd->path.mnt;
+ error = finish_open(file, nd->path.dentry, NULL, opened);
+ if (error)
+ goto out2;
+ error = open_check_o_direct(file);
+ if (error) {
+ fput(file);
+ } else if (!(op->open_flag & O_EXCL)) {
+ struct inode *inode = file_inode(file);
+ spin_lock(&inode->i_lock);
+ inode->i_state |= I_LINKABLE;
+ spin_unlock(&inode->i_lock);
+ }
+out2:
+ mnt_drop_write(nd->path.mnt);
+out:
+ path_put(&nd->path);
+ return error;
+}
+
static struct file *path_openat(int dfd, struct filename *pathname,
struct nameidata *nd, const struct open_flags *op, int flags)
{
@@ -2935,6 +2977,11 @@ static struct file *path_openat(int dfd, struct filename *pathname,
file->f_flags = op->open_flag;
+ if (unlikely(file->f_flags & O_TMPFILE)) {
+ error = do_tmpfile(dfd, pathname, nd, flags, op, file, &opened);
+ goto out;
+ }
+
error = path_init(dfd, pathname->name, flags | LOOKUP_PARENT, nd, &base);
if (unlikely(error))
goto out;
@@ -2987,9 +3034,10 @@ out:
}
struct file *do_filp_open(int dfd, struct filename *pathname,
- const struct open_flags *op, int flags)
+ const struct open_flags *op)
{
struct nameidata nd;
+ int flags = op->lookup_flags;
struct file *filp;
filp = path_openat(dfd, pathname, &nd, op, flags | LOOKUP_RCU);
@@ -3001,17 +3049,16 @@ struct file *do_filp_open(int dfd, struct filename *pathname,
}
struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt,
- const char *name, const struct open_flags *op, int flags)
+ const char *name, const struct open_flags *op)
{
struct nameidata nd;
struct file *file;
struct filename filename = { .name = name };
+ int flags = op->lookup_flags | LOOKUP_ROOT;
nd.root.mnt = mnt;
nd.root.dentry = dentry;
- flags |= LOOKUP_ROOT;
-
if (dentry->d_inode->i_op->follow_link && op->intent & LOOKUP_OPEN)
return ERR_PTR(-ELOOP);
@@ -3586,12 +3633,18 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de
mutex_lock(&inode->i_mutex);
/* Make sure we don't allow creating hardlink to an unlinked file */
- if (inode->i_nlink == 0)
+ if (inode->i_nlink == 0 && !(inode->i_state & I_LINKABLE))
error = -ENOENT;
else if (max_links && inode->i_nlink >= max_links)
error = -EMLINK;
else
error = dir->i_op->link(old_dentry, dir, new_dentry);
+
+ if (!error && (inode->i_state & I_LINKABLE)) {
+ spin_lock(&inode->i_lock);
+ inode->i_state &= ~I_LINKABLE;
+ spin_unlock(&inode->i_lock);
+ }
mutex_unlock(&inode->i_mutex);
if (!error)
fsnotify_link(dir, inode, new_dentry);
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index 0e7f002..3be0474 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -73,10 +73,8 @@ const struct inode_operations ncp_dir_inode_operations =
* Dentry operations routines
*/
static int ncp_lookup_validate(struct dentry *, unsigned int);
-static int ncp_hash_dentry(const struct dentry *, const struct inode *,
- struct qstr *);
-static int ncp_compare_dentry(const struct dentry *, const struct inode *,
- const struct dentry *, const struct inode *,
+static int ncp_hash_dentry(const struct dentry *, struct qstr *);
+static int ncp_compare_dentry(const struct dentry *, const struct dentry *,
unsigned int, const char *, const struct qstr *);
static int ncp_delete_dentry(const struct dentry *);
@@ -119,11 +117,19 @@ static inline int ncp_case_sensitive(const struct inode *i)
/*
* Note: leave the hash unchanged if the directory
* is case-sensitive.
+ *
+ * Accessing the parent inode can be racy under RCU pathwalking.
+ * Use ACCESS_ONCE() to make sure we use _one_ particular inode,
+ * the callers will handle races.
*/
static int
-ncp_hash_dentry(const struct dentry *dentry, const struct inode *inode,
- struct qstr *this)
+ncp_hash_dentry(const struct dentry *dentry, struct qstr *this)
{
+ struct inode *inode = ACCESS_ONCE(dentry->d_inode);
+
+ if (!inode)
+ return 0;
+
if (!ncp_case_sensitive(inode)) {
struct super_block *sb = dentry->d_sb;
struct nls_table *t;
@@ -140,14 +146,24 @@ ncp_hash_dentry(const struct dentry *dentry, const struct inode *inode,
return 0;
}
+/*
+ * Accessing the parent inode can be racy under RCU pathwalking.
+ * Use ACCESS_ONCE() to make sure we use _one_ particular inode,
+ * the callers will handle races.
+ */
static int
-ncp_compare_dentry(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+ncp_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
+ struct inode *pinode;
+
if (len != name->len)
return 1;
+ pinode = ACCESS_ONCE(parent->d_inode);
+ if (!pinode)
+ return 1;
+
if (ncp_case_sensitive(pinode))
return strncmp(str, name->name, len);
@@ -660,8 +676,6 @@ end_advance:
ctl.valid = 0;
if (!ctl.filled && (ctl.fpos == ctx->pos)) {
if (!ino)
- ino = find_inode_number(dentry, &qname);
- if (!ino)
ino = iunique(dir->i_sb, 2);
ctl.filled = !dir_emit(ctx, qname.name, qname.len,
ino, DT_UNKNOWN);
@@ -1123,17 +1137,6 @@ static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry,
old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
new_dentry->d_parent->d_name.name, new_dentry->d_name.name);
- if (new_dentry->d_inode && S_ISDIR(new_dentry->d_inode->i_mode)) {
- /*
- * fail with EBUSY if there are still references to this
- * directory.
- */
- dentry_unhash(new_dentry);
- error = -EBUSY;
- if (!d_unhashed(new_dentry))
- goto out;
- }
-
ncp_age_dentry(server, old_dentry);
ncp_age_dentry(server, new_dentry);
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index 26910c8..0765ad1 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -891,6 +891,10 @@ int ncp_notify_change(struct dentry *dentry, struct iattr *attr)
if (!server) /* How this could happen? */
goto out;
+ result = -EPERM;
+ if (IS_DEADDIR(dentry->d_inode))
+ goto out;
+
/* ageing the dentry to force validation */
ncp_age_dentry(server, dentry);
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 57db324..7ec4814 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -73,20 +73,20 @@ static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_
if (inode->i_flock == NULL)
goto out;
- /* Protect inode->i_flock using the file locks lock */
- lock_flocks();
+ /* Protect inode->i_flock using the i_lock */
+ spin_lock(&inode->i_lock);
for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
continue;
if (nfs_file_open_context(fl->fl_file) != ctx)
continue;
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
status = nfs4_lock_delegation_recall(fl, state, stateid);
if (status < 0)
goto out;
- lock_flocks();
+ spin_lock(&inode->i_lock);
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
out:
return status;
}
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 1fab140..ff10b4a 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1373,13 +1373,13 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_
/* Guard against delegation returns and new lock/unlock calls */
down_write(&nfsi->rwsem);
/* Protect inode->i_flock using the BKL */
- lock_flocks();
+ spin_lock(&inode->i_lock);
for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
continue;
if (nfs_file_open_context(fl->fl_file)->state != state)
continue;
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
status = ops->recover_lock(state, fl);
switch (status) {
case 0:
@@ -1406,9 +1406,9 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_
/* kill_proc(fl->fl_pid, SIGLOST, 1); */
status = 0;
}
- lock_flocks();
+ spin_lock(&inode->i_lock);
}
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
out:
up_write(&nfsi->rwsem);
return status;
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 316ec843..f170518 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -2645,13 +2645,13 @@ static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
- /* only place dl_time is set. protected by lock_flocks*/
+ /* Only place dl_time is set; protected by i_lock: */
dp->dl_time = get_seconds();
nfsd4_cb_recall(dp);
}
-/* Called from break_lease() with lock_flocks() held. */
+/* Called from break_lease() with i_lock held. */
static void nfsd_break_deleg_cb(struct file_lock *fl)
{
struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
@@ -4520,7 +4520,7 @@ check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner)
struct inode *inode = filp->fi_inode;
int status = 0;
- lock_flocks();
+ spin_lock(&inode->i_lock);
for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
status = 1;
@@ -4528,7 +4528,7 @@ check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner)
}
}
out:
- unlock_flocks();
+ spin_unlock(&inode->i_lock);
return status;
}
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 6c80083..1ea52f7 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -399,9 +399,6 @@ static int fanotify_release(struct inode *ignored, struct file *file)
wake_up(&group->fanotify_data.access_waitq);
#endif
- if (file->f_flags & FASYNC)
- fsnotify_fasync(-1, file, 0);
-
/* matches the fanotify_init->fsnotify_alloc_group */
fsnotify_destroy_group(group);
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 8a38714..41000f2 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2646,17 +2646,7 @@ static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence)
goto out;
}
- if (offset < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
- ret = -EINVAL;
- if (!ret && offset > inode->i_sb->s_maxbytes)
- ret = -EINVAL;
- if (ret)
- goto out;
-
- if (offset != file->f_pos) {
- file->f_pos = offset;
- file->f_version = 0;
- }
+ offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
out:
mutex_unlock(&inode->i_mutex);
diff --git a/fs/open.c b/fs/open.c
index 8c74100..fca72c4 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -840,11 +840,15 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
if (flags & __O_SYNC)
flags |= O_DSYNC;
- /*
- * If we have O_PATH in the open flag. Then we
- * cannot have anything other than the below set of flags
- */
- if (flags & O_PATH) {
+ if (flags & O_TMPFILE) {
+ if (!(flags & O_CREAT))
+ return -EINVAL;
+ acc_mode = MAY_OPEN | ACC_MODE(flags);
+ } else if (flags & O_PATH) {
+ /*
+ * If we have O_PATH in the open flag. Then we
+ * cannot have anything other than the below set of flags
+ */
flags &= O_DIRECTORY | O_NOFOLLOW | O_PATH;
acc_mode = 0;
} else {
@@ -876,7 +880,8 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
lookup_flags |= LOOKUP_DIRECTORY;
if (!(flags & O_NOFOLLOW))
lookup_flags |= LOOKUP_FOLLOW;
- return lookup_flags;
+ op->lookup_flags = lookup_flags;
+ return 0;
}
/**
@@ -893,8 +898,8 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
struct file *file_open_name(struct filename *name, int flags, umode_t mode)
{
struct open_flags op;
- int lookup = build_open_flags(flags, mode, &op);
- return do_filp_open(AT_FDCWD, name, &op, lookup);
+ int err = build_open_flags(flags, mode, &op);
+ return err ? ERR_PTR(err) : do_filp_open(AT_FDCWD, name, &op);
}
/**
@@ -919,37 +924,43 @@ struct file *file_open_root(struct dentry *dentry, struct vfsmount *mnt,
const char *filename, int flags)
{
struct open_flags op;
- int lookup = build_open_flags(flags, 0, &op);
+ int err = build_open_flags(flags, 0, &op);
+ if (err)
+ return ERR_PTR(err);
if (flags & O_CREAT)
return ERR_PTR(-EINVAL);
if (!filename && (flags & O_DIRECTORY))
if (!dentry->d_inode->i_op->lookup)
return ERR_PTR(-ENOTDIR);
- return do_file_open_root(dentry, mnt, filename, &op, lookup);
+ return do_file_open_root(dentry, mnt, filename, &op);
}
EXPORT_SYMBOL(file_open_root);
long do_sys_open(int dfd, const char __user *filename, int flags, umode_t mode)
{
struct open_flags op;
- int lookup = build_open_flags(flags, mode, &op);
- struct filename *tmp = getname(filename);
- int fd = PTR_ERR(tmp);
-
- if (!IS_ERR(tmp)) {
- fd = get_unused_fd_flags(flags);
- if (fd >= 0) {
- struct file *f = do_filp_open(dfd, tmp, &op, lookup);
- if (IS_ERR(f)) {
- put_unused_fd(fd);
- fd = PTR_ERR(f);
- } else {
- fsnotify_open(f);
- fd_install(fd, f);
- }
+ int fd = build_open_flags(flags, mode, &op);
+ struct filename *tmp;
+
+ if (fd)
+ return fd;
+
+ tmp = getname(filename);
+ if (IS_ERR(tmp))
+ return PTR_ERR(tmp);
+
+ fd = get_unused_fd_flags(flags);
+ if (fd >= 0) {
+ struct file *f = do_filp_open(dfd, tmp, &op);
+ if (IS_ERR(f)) {
+ put_unused_fd(fd);
+ fd = PTR_ERR(f);
+ } else {
+ fsnotify_open(f);
+ fd_install(fd, f);
}
- putname(tmp);
}
+ putname(tmp);
return fd;
}
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 0016350..1485e38 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1686,41 +1686,29 @@ bool proc_fill_cache(struct file *file, struct dir_context *ctx,
instantiate_t instantiate, struct task_struct *task, const void *ptr)
{
struct dentry *child, *dir = file->f_path.dentry;
+ struct qstr qname = QSTR_INIT(name, len);
struct inode *inode;
- struct qstr qname;
- ino_t ino = 0;
- unsigned type = DT_UNKNOWN;
+ unsigned type;
+ ino_t ino;
- qname.name = name;
- qname.len = len;
- qname.hash = full_name_hash(name, len);
-
- child = d_lookup(dir, &qname);
+ child = d_hash_and_lookup(dir, &qname);
if (!child) {
- struct dentry *new;
- new = d_alloc(dir, &qname);
- if (new) {
- child = instantiate(dir->d_inode, new, task, ptr);
- if (child)
- dput(new);
- else
- child = new;
+ child = d_alloc(dir, &qname);
+ if (!child)
+ goto end_instantiate;
+ if (instantiate(dir->d_inode, child, task, ptr) < 0) {
+ dput(child);
+ goto end_instantiate;
}
}
- if (!child || IS_ERR(child) || !child->d_inode)
- goto end_instantiate;
inode = child->d_inode;
- if (inode) {
- ino = inode->i_ino;
- type = inode->i_mode >> 12;
- }
+ ino = inode->i_ino;
+ type = inode->i_mode >> 12;
dput(child);
-end_instantiate:
- if (!ino)
- ino = find_inode_number(dir, &qname);
- if (!ino)
- ino = 1;
return dir_emit(ctx, name, len, ino, type);
+
+end_instantiate:
+ return dir_emit(ctx, name, len, 1, DT_UNKNOWN);
}
#ifdef CONFIG_CHECKPOINT_RESTORE
@@ -1846,7 +1834,7 @@ struct map_files_info {
unsigned char name[4*sizeof(long)+2]; /* max: %lx-%lx\0 */
};
-static struct dentry *
+static int
proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
struct task_struct *task, const void *ptr)
{
@@ -1856,7 +1844,7 @@ proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
inode = proc_pid_make_inode(dir->i_sb, task);
if (!inode)
- return ERR_PTR(-ENOENT);
+ return -ENOENT;
ei = PROC_I(inode);
ei->op.proc_get_link = proc_map_files_get_link;
@@ -1873,7 +1861,7 @@ proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
d_set_d_op(dentry, &tid_map_files_dentry_operations);
d_add(dentry, inode);
- return NULL;
+ return 0;
}
static struct dentry *proc_map_files_lookup(struct inode *dir,
@@ -1882,23 +1870,23 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
unsigned long vm_start, vm_end;
struct vm_area_struct *vma;
struct task_struct *task;
- struct dentry *result;
+ int result;
struct mm_struct *mm;
- result = ERR_PTR(-EPERM);
+ result = -EPERM;
if (!capable(CAP_SYS_ADMIN))
goto out;
- result = ERR_PTR(-ENOENT);
+ result = -ENOENT;
task = get_proc_task(dir);
if (!task)
goto out;
- result = ERR_PTR(-EACCES);
+ result = -EACCES;
if (!ptrace_may_access(task, PTRACE_MODE_READ))
goto out_put_task;
- result = ERR_PTR(-ENOENT);
+ result = -ENOENT;
if (dname_to_vma_addr(dentry, &vm_start, &vm_end))
goto out_put_task;
@@ -1921,7 +1909,7 @@ out_no_vma:
out_put_task:
put_task_struct(task);
out:
- return result;
+ return ERR_PTR(result);
}
static const struct inode_operations proc_map_files_inode_operations = {
@@ -2135,13 +2123,12 @@ static const struct file_operations proc_timers_operations = {
};
#endif /* CONFIG_CHECKPOINT_RESTORE */
-static struct dentry *proc_pident_instantiate(struct inode *dir,
+static int proc_pident_instantiate(struct inode *dir,
struct dentry *dentry, struct task_struct *task, const void *ptr)
{
const struct pid_entry *p = ptr;
struct inode *inode;
struct proc_inode *ei;
- struct dentry *error = ERR_PTR(-ENOENT);
inode = proc_pid_make_inode(dir->i_sb, task);
if (!inode)
@@ -2160,9 +2147,9 @@ static struct dentry *proc_pident_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, 0))
- error = NULL;
+ return 0;
out:
- return error;
+ return -ENOENT;
}
static struct dentry *proc_pident_lookup(struct inode *dir,
@@ -2170,11 +2157,11 @@ static struct dentry *proc_pident_lookup(struct inode *dir,
const struct pid_entry *ents,
unsigned int nents)
{
- struct dentry *error;
+ int error;
struct task_struct *task = get_proc_task(dir);
const struct pid_entry *p, *last;
- error = ERR_PTR(-ENOENT);
+ error = -ENOENT;
if (!task)
goto out_no_task;
@@ -2197,7 +2184,7 @@ static struct dentry *proc_pident_lookup(struct inode *dir,
out:
put_task_struct(task);
out_no_task:
- return error;
+ return ERR_PTR(error);
}
static int proc_pident_readdir(struct file *file, struct dir_context *ctx,
@@ -2780,11 +2767,10 @@ void proc_flush_task(struct task_struct *task)
}
}
-static struct dentry *proc_pid_instantiate(struct inode *dir,
- struct dentry * dentry,
- struct task_struct *task, const void *ptr)
+static int proc_pid_instantiate(struct inode *dir,
+ struct dentry * dentry,
+ struct task_struct *task, const void *ptr)
{
- struct dentry *error = ERR_PTR(-ENOENT);
struct inode *inode;
inode = proc_pid_make_inode(dir->i_sb, task);
@@ -2804,14 +2790,14 @@ static struct dentry *proc_pid_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, 0))
- error = NULL;
+ return 0;
out:
- return error;
+ return -ENOENT;
}
struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
- struct dentry *result = NULL;
+ int result = 0;
struct task_struct *task;
unsigned tgid;
struct pid_namespace *ns;
@@ -2832,7 +2818,7 @@ struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsign
result = proc_pid_instantiate(dir, dentry, task, NULL);
put_task_struct(task);
out:
- return result;
+ return ERR_PTR(result);
}
/*
@@ -2884,21 +2870,21 @@ retry:
int proc_pid_readdir(struct file *file, struct dir_context *ctx)
{
struct tgid_iter iter;
- struct pid_namespace *ns;
+ struct pid_namespace *ns = file->f_dentry->d_sb->s_fs_info;
loff_t pos = ctx->pos;
if (pos >= PID_MAX_LIMIT + TGID_OFFSET)
return 0;
if (pos == TGID_OFFSET - 1) {
- if (!proc_fill_cache(file, ctx, "self", 4, NULL, NULL, NULL))
+ struct inode *inode = ns->proc_self->d_inode;
+ if (!dir_emit(ctx, "self", 4, inode->i_ino, DT_LNK))
return 0;
iter.tgid = 0;
} else {
iter.tgid = pos - TGID_OFFSET;
}
iter.task = NULL;
- ns = file->f_dentry->d_sb->s_fs_info;
for (iter = next_tgid(ns, iter);
iter.task;
iter.tgid += 1, iter = next_tgid(ns, iter)) {
@@ -3027,10 +3013,9 @@ static const struct inode_operations proc_tid_base_inode_operations = {
.setattr = proc_setattr,
};
-static struct dentry *proc_task_instantiate(struct inode *dir,
+static int proc_task_instantiate(struct inode *dir,
struct dentry *dentry, struct task_struct *task, const void *ptr)
{
- struct dentry *error = ERR_PTR(-ENOENT);
struct inode *inode;
inode = proc_pid_make_inode(dir->i_sb, task);
@@ -3049,14 +3034,14 @@ static struct dentry *proc_task_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, 0))
- error = NULL;
+ return 0;
out:
- return error;
+ return -ENOENT;
}
static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
- struct dentry *result = ERR_PTR(-ENOENT);
+ int result = -ENOENT;
struct task_struct *task;
struct task_struct *leader = get_proc_task(dir);
unsigned tid;
@@ -3086,7 +3071,7 @@ out_drop_task:
out:
put_task_struct(leader);
out_no_task:
- return result;
+ return ERR_PTR(result);
}
/*
diff --git a/fs/proc/fd.c b/fs/proc/fd.c
index 1441f14..75f2890 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -167,11 +167,10 @@ static int proc_fd_link(struct dentry *dentry, struct path *path)
return ret;
}
-static struct dentry *
+static int
proc_fd_instantiate(struct inode *dir, struct dentry *dentry,
struct task_struct *task, const void *ptr)
{
- struct dentry *error = ERR_PTR(-ENOENT);
unsigned fd = (unsigned long)ptr;
struct proc_inode *ei;
struct inode *inode;
@@ -194,9 +193,9 @@ proc_fd_instantiate(struct inode *dir, struct dentry *dentry,
/* Close the race of the process dying before we return the dentry */
if (tid_fd_revalidate(dentry, 0))
- error = NULL;
+ return 0;
out:
- return error;
+ return -ENOENT;
}
static struct dentry *proc_lookupfd_common(struct inode *dir,
@@ -204,7 +203,7 @@ static struct dentry *proc_lookupfd_common(struct inode *dir,
instantiate_t instantiate)
{
struct task_struct *task = get_proc_task(dir);
- struct dentry *result = ERR_PTR(-ENOENT);
+ int result = -ENOENT;
unsigned fd = name_to_int(dentry);
if (!task)
@@ -216,7 +215,7 @@ static struct dentry *proc_lookupfd_common(struct inode *dir,
out:
put_task_struct(task);
out_no_task:
- return result;
+ return ERR_PTR(result);
}
static int proc_readfd_common(struct file *file, struct dir_context *ctx,
@@ -300,11 +299,10 @@ const struct inode_operations proc_fd_inode_operations = {
.setattr = proc_setattr,
};
-static struct dentry *
+static int
proc_fdinfo_instantiate(struct inode *dir, struct dentry *dentry,
struct task_struct *task, const void *ptr)
{
- struct dentry *error = ERR_PTR(-ENOENT);
unsigned fd = (unsigned long)ptr;
struct proc_inode *ei;
struct inode *inode;
@@ -324,9 +322,9 @@ proc_fdinfo_instantiate(struct inode *dir, struct dentry *dentry,
/* Close the race of the process dying before we return the dentry */
if (tid_fd_revalidate(dentry, 0))
- error = NULL;
+ return 0;
out:
- return error;
+ return -ENOENT;
}
static struct dentry *
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 4eae2e1..651d09a 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -170,7 +170,7 @@ extern struct dentry *proc_pid_lookup(struct inode *, struct dentry *, unsigned
extern loff_t mem_lseek(struct file *, loff_t, int);
/* Lookups */
-typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
+typedef int instantiate_t(struct inode *, struct dentry *,
struct task_struct *, const void *);
extern bool proc_fill_cache(struct file *, struct dir_context *, const char *, int,
instantiate_t, struct task_struct *, const void *);
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index f6abbbb..49a7fff 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -187,13 +187,12 @@ static const struct inode_operations proc_ns_link_inode_operations = {
.setattr = proc_setattr,
};
-static struct dentry *proc_ns_instantiate(struct inode *dir,
+static int proc_ns_instantiate(struct inode *dir,
struct dentry *dentry, struct task_struct *task, const void *ptr)
{
const struct proc_ns_operations *ns_ops = ptr;
struct inode *inode;
struct proc_inode *ei;
- struct dentry *error = ERR_PTR(-ENOENT);
inode = proc_pid_make_inode(dir->i_sb, task);
if (!inode)
@@ -208,9 +207,9 @@ static struct dentry *proc_ns_instantiate(struct inode *dir,
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, 0))
- error = NULL;
+ return 0;
out:
- return error;
+ return -ENOENT;
}
static int proc_ns_dir_readdir(struct file *file, struct dir_context *ctx)
@@ -248,12 +247,12 @@ const struct file_operations proc_ns_dir_operations = {
static struct dentry *proc_ns_dir_lookup(struct inode *dir,
struct dentry *dentry, unsigned int flags)
{
- struct dentry *error;
+ int error;
struct task_struct *task = get_proc_task(dir);
const struct proc_ns_operations **entry, **last;
unsigned int len = dentry->d_name.len;
- error = ERR_PTR(-ENOENT);
+ error = -ENOENT;
if (!task)
goto out_no_task;
@@ -272,7 +271,7 @@ static struct dentry *proc_ns_dir_lookup(struct inode *dir,
out:
put_task_struct(task);
out_no_task:
- return error;
+ return ERR_PTR(error);
}
const struct inode_operations proc_ns_dir_inode_operations = {
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index f3a570e..7129046 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -796,15 +796,16 @@ static int sysctl_is_seen(struct ctl_table_header *p)
return res;
}
-static int proc_sys_compare(const struct dentry *parent,
- const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+static int proc_sys_compare(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
struct ctl_table_header *head;
+ struct inode *inode;
+
/* Although proc doesn't have negative dentries, rcu-walk means
* that inode here can be NULL */
/* AV: can it, indeed? */
+ inode = ACCESS_ONCE(dentry->d_inode);
if (!inode)
return 1;
if (name->len != len)
diff --git a/fs/read_write.c b/fs/read_write.c
index 2cefa41..122a384 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -41,8 +41,19 @@ static inline int unsigned_offsets(struct file *file)
return file->f_mode & FMODE_UNSIGNED_OFFSET;
}
-static loff_t lseek_execute(struct file *file, struct inode *inode,
- loff_t offset, loff_t maxsize)
+/**
+ * vfs_setpos - update the file offset for lseek
+ * @file: file structure in question
+ * @offset: file offset to seek to
+ * @maxsize: maximum file size
+ *
+ * This is a low-level filesystem helper for updating the file offset to
+ * the value specified by @offset if the given offset is valid and it is
+ * not equal to the current file offset.
+ *
+ * Return the specified offset on success and -EINVAL on invalid offset.
+ */
+loff_t vfs_setpos(struct file *file, loff_t offset, loff_t maxsize)
{
if (offset < 0 && !unsigned_offsets(file))
return -EINVAL;
@@ -55,6 +66,7 @@ static loff_t lseek_execute(struct file *file, struct inode *inode,
}
return offset;
}
+EXPORT_SYMBOL(vfs_setpos);
/**
* generic_file_llseek_size - generic llseek implementation for regular files
@@ -76,8 +88,6 @@ loff_t
generic_file_llseek_size(struct file *file, loff_t offset, int whence,
loff_t maxsize, loff_t eof)
{
- struct inode *inode = file->f_mapping->host;
-
switch (whence) {
case SEEK_END:
offset += eof;
@@ -97,8 +107,7 @@ generic_file_llseek_size(struct file *file, loff_t offset, int whence,
* like SEEK_SET.
*/
spin_lock(&file->f_lock);
- offset = lseek_execute(file, inode, file->f_pos + offset,
- maxsize);
+ offset = vfs_setpos(file, file->f_pos + offset, maxsize);
spin_unlock(&file->f_lock);
return offset;
case SEEK_DATA:
@@ -120,7 +129,7 @@ generic_file_llseek_size(struct file *file, loff_t offset, int whence,
break;
}
- return lseek_execute(file, inode, offset, maxsize);
+ return vfs_setpos(file, offset, maxsize);
}
EXPORT_SYMBOL(generic_file_llseek_size);
@@ -145,6 +154,26 @@ loff_t generic_file_llseek(struct file *file, loff_t offset, int whence)
EXPORT_SYMBOL(generic_file_llseek);
/**
+ * fixed_size_llseek - llseek implementation for fixed-sized devices
+ * @file: file structure to seek on
+ * @offset: file offset to seek to
+ * @whence: type of seek
+ * @size: size of the file
+ *
+ */
+loff_t fixed_size_llseek(struct file *file, loff_t offset, int whence, loff_t size)
+{
+ switch (whence) {
+ case SEEK_SET: case SEEK_CUR: case SEEK_END:
+ return generic_file_llseek_size(file, offset, whence,
+ size, size);
+ default:
+ return -EINVAL;
+ }
+}
+EXPORT_SYMBOL(fixed_size_llseek);
+
+/**
* noop_llseek - No Operation Performed llseek implementation
* @file: file structure to seek on
* @offset: file offset to seek to
@@ -296,7 +325,7 @@ out_putf:
* them to something that fits in "int" so that others
* won't have to do range checks all the time.
*/
-int rw_verify_area(int read_write, struct file *file, loff_t *ppos, size_t count)
+int rw_verify_area(int read_write, struct file *file, const loff_t *ppos, size_t count)
{
struct inode *inode;
loff_t pos;
@@ -477,7 +506,8 @@ SYSCALL_DEFINE3(read, unsigned int, fd, char __user *, buf, size_t, count)
if (f.file) {
loff_t pos = file_pos_read(f.file);
ret = vfs_read(f.file, buf, count, &pos);
- file_pos_write(f.file, pos);
+ if (ret >= 0)
+ file_pos_write(f.file, pos);
fdput(f);
}
return ret;
@@ -492,7 +522,8 @@ SYSCALL_DEFINE3(write, unsigned int, fd, const char __user *, buf,
if (f.file) {
loff_t pos = file_pos_read(f.file);
ret = vfs_write(f.file, buf, count, &pos);
- file_pos_write(f.file, pos);
+ if (ret >= 0)
+ file_pos_write(f.file, pos);
fdput(f);
}
@@ -780,7 +811,8 @@ SYSCALL_DEFINE3(readv, unsigned long, fd, const struct iovec __user *, vec,
if (f.file) {
loff_t pos = file_pos_read(f.file);
ret = vfs_readv(f.file, vec, vlen, &pos);
- file_pos_write(f.file, pos);
+ if (ret >= 0)
+ file_pos_write(f.file, pos);
fdput(f);
}
@@ -799,7 +831,8 @@ SYSCALL_DEFINE3(writev, unsigned long, fd, const struct iovec __user *, vec,
if (f.file) {
loff_t pos = file_pos_read(f.file);
ret = vfs_writev(f.file, vec, vlen, &pos);
- file_pos_write(f.file, pos);
+ if (ret >= 0)
+ file_pos_write(f.file, pos);
fdput(f);
}
@@ -959,7 +992,8 @@ COMPAT_SYSCALL_DEFINE3(readv, unsigned long, fd,
return -EBADF;
pos = f.file->f_pos;
ret = compat_readv(f.file, vec, vlen, &pos);
- f.file->f_pos = pos;
+ if (ret >= 0)
+ f.file->f_pos = pos;
fdput(f);
return ret;
}
@@ -1025,7 +1059,8 @@ COMPAT_SYSCALL_DEFINE3(writev, unsigned long, fd,
return -EBADF;
pos = f.file->f_pos;
ret = compat_writev(f.file, vec, vlen, &pos);
- f.file->f_pos = pos;
+ if (ret >= 0)
+ f.file->f_pos = pos;
fdput(f);
return ret;
}
@@ -1129,7 +1164,9 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
if (in.file->f_flags & O_NONBLOCK)
fl = SPLICE_F_NONBLOCK;
#endif
+ file_start_write(out.file);
retval = do_splice_direct(in.file, &pos, out.file, &out_pos, count, fl);
+ file_end_write(out.file);
if (retval > 0) {
add_rchar(current, retval);
diff --git a/fs/splice.c b/fs/splice.c
index d37431d..3b7ee65 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1098,27 +1098,13 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
{
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
loff_t *, size_t, unsigned int);
- int ret;
-
- if (unlikely(!(out->f_mode & FMODE_WRITE)))
- return -EBADF;
-
- if (unlikely(out->f_flags & O_APPEND))
- return -EINVAL;
-
- ret = rw_verify_area(WRITE, out, ppos, len);
- if (unlikely(ret < 0))
- return ret;
if (out->f_op && out->f_op->splice_write)
splice_write = out->f_op->splice_write;
else
splice_write = default_file_splice_write;
- file_start_write(out);
- ret = splice_write(pipe, out, ppos, len, flags);
- file_end_write(out);
- return ret;
+ return splice_write(pipe, out, ppos, len, flags);
}
/*
@@ -1307,6 +1293,16 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
};
long ret;
+ if (unlikely(!(out->f_mode & FMODE_WRITE)))
+ return -EBADF;
+
+ if (unlikely(out->f_flags & O_APPEND))
+ return -EINVAL;
+
+ ret = rw_verify_area(WRITE, out, opos, len);
+ if (unlikely(ret < 0))
+ return ret;
+
ret = splice_direct_to_actor(in, &sd, direct_splice_actor);
if (ret > 0)
*ppos = sd.pos;
@@ -1362,7 +1358,19 @@ static long do_splice(struct file *in, loff_t __user *off_in,
offset = out->f_pos;
}
+ if (unlikely(!(out->f_mode & FMODE_WRITE)))
+ return -EBADF;
+
+ if (unlikely(out->f_flags & O_APPEND))
+ return -EINVAL;
+
+ ret = rw_verify_area(WRITE, out, &offset, len);
+ if (unlikely(ret < 0))
+ return ret;
+
+ file_start_write(out);
ret = do_splice_from(ipipe, out, &offset, len, flags);
+ file_end_write(out);
if (!off_out)
out->f_pos = offset;
diff --git a/fs/sysv/namei.c b/fs/sysv/namei.c
index 1c0d5f2..731b2bb 100644
--- a/fs/sysv/namei.c
+++ b/fs/sysv/namei.c
@@ -27,8 +27,7 @@ static int add_nondir(struct dentry *dentry, struct inode *inode)
return err;
}
-static int sysv_hash(const struct dentry *dentry, const struct inode *inode,
- struct qstr *qstr)
+static int sysv_hash(const struct dentry *dentry, struct qstr *qstr)
{
/* Truncate the name in place, avoids having to define a compare
function. */
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 102c072..5f6fc17 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -594,6 +594,29 @@ static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
return 0;
}
+static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct inode *inode;
+ struct udf_inode_info *iinfo;
+ int err;
+
+ inode = udf_new_inode(dir, mode, &err);
+ if (!inode)
+ return err;
+
+ iinfo = UDF_I(inode);
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ inode->i_data.a_ops = &udf_adinicb_aops;
+ else
+ inode->i_data.a_ops = &udf_aops;
+ inode->i_op = &udf_file_inode_operations;
+ inode->i_fop = &udf_file_operations;
+ mark_inode_dirty(inode);
+
+ d_tmpfile(dentry, inode);
+ return 0;
+}
+
static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
dev_t rdev)
{
@@ -1311,6 +1334,7 @@ const struct inode_operations udf_dir_inode_operations = {
.rmdir = udf_rmdir,
.mknod = udf_mknod,
.rename = udf_rename,
+ .tmpfile = udf_tmpfile,
};
const struct inode_operations udf_symlink_inode_operations = {
.readlink = generic_readlink,
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 0ad2b95..de3dc98 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -1268,8 +1268,7 @@ xfs_seek_data(
}
out:
- if (offset != file->f_pos)
- file->f_pos = offset;
+ offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
out_unlock:
xfs_iunlock_map_shared(ip, lock);
@@ -1377,8 +1376,7 @@ out:
* situation in particular.
*/
offset = min_t(loff_t, offset, isize);
- if (offset != file->f_pos)
- file->f_pos = offset;
+ offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
out_unlock:
xfs_iunlock_map_shared(ip, lock);
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