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Miklos Szeredi 0ef97dcfce nfs: don't open in ->d_revalidate 
NFSv4 can't do reliable opens in d_revalidate, since it cannot know whether a
mount needs to be followed or not.  It does check d_mountpoint() on the dentry,
which can result in a weird error if the VFS found that the mount does not in
fact need to be followed, e.g.:

  # mount --bind /mnt/nfs /mnt/nfs-clone
  # echo something > /mnt/nfs/tmp/bar
  # echo x > /tmp/file
  # mount --bind /tmp/file /mnt/nfs-clone/tmp/bar
  # cat  /mnt/nfs/tmp/bar
  cat: /mnt/nfs/tmp/bar: Not a directory

Which should, by any sane filesystem, result in "something" being printed.

So instead do the open in f_op->open() and in the unlikely case that the cached
dentry turned out to be invalid, drop the dentry and return EOPENSTALE to let
the VFS retry.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01 12:12:02 -04:00
..
9p
kill v9fs_dentry_from_dir_inode()
2012-05-29 23:28:34 -04:00
adfs
switch open-coded instances of d_make_root() to new helper
2012-03-20 21:29:35 -04:00
affs
affs: bury unused macros
2012-05-29 23:28:34 -04:00
afs
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
autofs4
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
befs
switch open-coded instances of d_make_root() to new helper
2012-03-20 21:29:35 -04:00
bfs
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
btrfs
Btrfs: move over to use ->update_time
2012-06-01 12:07:52 -04:00
cachefiles
switch touch_atime to struct path
2012-03-20 21:29:41 -04:00
ceph
ceph: move encode_fh to new API
2012-05-29 23:28:33 -04:00
cifs
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
2012-05-29 12:42:10 -07:00
coda
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
configfs
make configfs_pin_fs() return root dentry on success
2012-03-20 21:29:48 -04:00
cramfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-03-21 13:36:41 -07:00
debugfs
debugfs: Add support to print u32 array in debugfs
2012-04-17 00:18:36 -04:00
devpts
userns: Convert devpts to use kuid/kgid where appropriate
2012-05-15 14:59:26 -07:00
dlm
dlm: NULL dereference on failure in kmem_cache_create()
2012-05-15 10:39:28 -05:00
ecryptfs
get rid of pointless allocations and copying in ecryptfs_follow_link()
2012-05-29 23:28:40 -04:00
efs
switch open-coded instances of d_make_root() to new helper
2012-03-20 21:29:35 -04:00
exofs
Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd
2012-05-28 13:10:41 -07:00
exportfs
->encode_fh() API change
2012-05-29 23:28:33 -04:00
ext2
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
ext3
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
ext4
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
fat
->encode_fh() API change
2012-05-29 23:28:33 -04:00
freevxfs
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
fscache
…
fuse
fs: introduce inode operation ->update_time
2012-06-01 12:07:25 -04:00
gfs2
->encode_fh() API change
2012-05-29 23:28:33 -04:00
hfs
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
hfsplus
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
hostfs
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
hpfs
hpfs: assorted endianness annotations
2012-05-29 23:28:39 -04:00
hppfs
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
hugetlbfs
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
isofs
->encode_fh() API change
2012-05-29 23:28:33 -04:00
jbd
jbd: Write journal superblock with WRITE_FUA after checkpointing
2012-05-15 23:34:37 +02:00
jbd2
jbd2: use GFP_NOFS for blkdev_issue_flush
2012-04-23 21:43:41 -04:00
jffs2
jffs2: get rid of jffs2_sync_super
2012-05-30 21:04:52 -04:00
jfs
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
lockd
lockd: fix the endianness bug
2012-04-13 13:50:52 -04:00
logfs
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
minix
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
ncpfs
fs: introduce inode operation ->update_time
2012-06-01 12:07:25 -04:00
nfs
nfs: don't open in ->d_revalidate
2012-06-01 12:12:02 -04:00
nfs_common
…
nfsd
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-05-23 17:42:39 -07:00
nilfs2
->encode_fh() API change
2012-05-29 23:28:33 -04:00
nls
…
notify
fsnotify: remove unused parameter from send_to_group()
2012-05-30 21:04:53 -04:00
ntfs
fs: introduce inode operation ->update_time
2012-06-01 12:07:25 -04:00
ocfs2
ocfs: simplify symlink handling
2012-05-29 23:28:40 -04:00
omfs
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
openpromfs
switch open-coded instances of d_make_root() to new helper
2012-03-20 21:29:35 -04:00
proc
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
pstore
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
qnx4
qnx4: new helper - try_extent()
2012-03-20 21:29:52 -04:00
qnx6
fs: initial qnx6fs addition
2012-03-20 21:29:38 -04:00
quota
quota: Get rid of nested I_MUTEX_QUOTA locking subclass
2012-05-15 23:34:39 +02:00
ramfs
tidy up after d_make_root() conversion
2012-03-20 21:29:37 -04:00
reiserfs
reiserfs: get rid of resierfs_sync_super
2012-06-01 10:37:36 -04:00
romfs
Merge tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6
2012-03-30 17:31:56 -07:00
squashfs
Merge tag 'squashfs-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next
2012-03-28 18:05:54 -07:00
sysfs
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
sysv
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
ubifs
ubifs: use generic_fillattr()
2012-05-29 23:28:32 -04:00
udf
->encode_fh() API change
2012-05-29 23:28:33 -04:00
ufs
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
xfs
fs: introduce inode operation ->update_time
2012-06-01 12:07:25 -04:00
aio.c
switch aio and shm to do_mmap_pgoff(), make do_mmap() static
2012-06-01 10:37:17 -04:00
anon_inodes.c
anon_inodes: move allocation of anon_inode into ->mount()
2012-03-20 21:29:45 -04:00
attr.c
vfs: increment iversion when a file is truncated
2012-05-30 21:04:53 -04:00
bad_inode.c
fs: reduce the use of module.h wherever possible
2012-02-28 19:31:58 -05:00
binfmt_aout.c
VM: add "vm_mmap()" helper function
2012-04-20 17:29:13 -07:00
binfmt_elf_fdpic.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-05-23 17:42:39 -07:00
binfmt_elf.c
binfmt_elf: switch elf_map() to vm_mmap/vm_munmap
2012-05-30 21:04:55 -04:00
binfmt_em86.c
__register_binfmt() made void
2012-03-20 21:29:46 -04:00
binfmt_flat.c
binfmt_flat: use vm_munmap, we are missing ->mmap_sem there
2012-05-30 21:04:56 -04:00
binfmt_misc.c
vfs: Rename end_writeback() to clear_inode()
2012-05-06 13:43:41 +08:00
binfmt_script.c
__register_binfmt() made void
2012-03-20 21:29:46 -04:00
binfmt_som.c
VM: add "vm_mmap()" helper function
2012-04-20 17:29:13 -07:00
bio-integrity.c
fs: remove the second argument of k[un]map_atomic()
2012-03-20 21:48:21 +08:00
bio.c
bio allocation failure due to bio_get_nr_vecs()
2012-05-11 16:45:12 +02:00
block_dev.c
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
2012-05-28 09:54:45 -07:00
buffer.c
fs: Move bh_cachep to the __read_mostly section
2012-05-30 21:04:52 -04:00
char_dev.c
…
compat_binfmt_elf.c
…
compat_ioctl.c
Merge tag 'module-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2012-03-24 10:24:31 -07:00
compat.c
switch readdir/getdents to fget_light/fput_light
2012-05-29 23:28:29 -04:00
dcache.c
vfs: remove unused __d_splice_alias argument
2012-05-30 21:04:54 -04:00
dcookies.c
fs: reduce the use of module.h wherever possible
2012-02-28 19:31:58 -05:00
direct-io.c
Restore direct_io / truncate locking API
2012-02-23 15:56:21 -08:00
drop_caches.c
…
eventfd.c
fs: reduce the use of module.h wherever possible
2012-02-28 19:31:58 -05:00
eventpoll.c
epoll: Fix user space breakage related to EPOLLWAKEUP
2012-05-22 20:57:06 +02:00
exec.c
split ->file_mmap() into ->mmap_addr()/->mmap_file()
2012-05-31 13:11:54 -04:00
fcntl.c
switch fcntl to fget_raw_light/fput_light
2012-05-29 23:28:30 -04:00
fhandle.c
…
fifo.c
…
file_table.c
brlocks/lglocks: API cleanups
2012-05-29 23:28:41 -04:00
file.c
Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-03-29 18:12:23 -07:00
filesystems.c
…
fs_struct.c
Merge tag 'module-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2012-03-24 10:24:31 -07:00
fs-writeback.c
writeback: Avoid iput() from flusher thread
2012-05-06 13:43:41 +08:00
generic_acl.c
…
inode.c
fs: introduce inode operation ->update_time
2012-06-01 12:07:25 -04:00
internal.h
vfs: split __dentry_open()
2012-06-01 12:12:00 -04:00
ioctl.c
fs: reduce the use of module.h wherever possible
2012-02-28 19:31:58 -05:00
ioprio.c
userns: Use uid_eq gid_eq helpers when comparing kuids and kgids in the vfs
2012-05-03 03:29:34 -07:00
Kconfig
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-03-21 13:36:41 -07:00
Kconfig.binfmt
C6X: add support to build with BINFMT_ELF_FDPIC
2012-05-15 09:17:34 -04:00
libfs.c
vfs: make it possible to access the dentry hash/len as one 64-bit entry
2012-05-10 19:54:35 -07:00
locks.c
switch flock to fget_light/fput_light
2012-05-29 23:28:31 -04:00
Makefile
fs: initial qnx6fs addition
2012-03-20 21:29:38 -04:00
mbcache.c
…
mount.h
…
mpage.c
fs: reduce the use of module.h wherever possible
2012-02-28 19:31:58 -05:00
namei.c
vfs: retry last component if opening stale dentry
2012-06-01 12:12:01 -04:00
namespace.c
vfs: umount_tree() might be called on subtree that had never made it
2012-05-30 21:04:55 -04:00
no-block.c
…
open.c
vfs: nameidata_to_filp(): don't throw away file on error
2012-06-01 12:12:01 -04:00
pipe.c
fs: introduce inode operation ->update_time
2012-06-01 12:07:25 -04:00
pnode.c
brlocks/lglocks: API cleanups
2012-05-29 23:28:41 -04:00
pnode.h
…
posix_acl.c
fs: reduce the use of module.h wherever possible
2012-02-28 19:31:58 -05:00
proc_namespace.c
brlocks/lglocks: API cleanups
2012-05-29 23:28:41 -04:00
read_write.c
fs: reduce the use of module.h wherever possible
2012-02-28 19:31:58 -05:00
read_write.h
…
readdir.c
switch readdir/getdents to fget_light/fput_light
2012-05-29 23:28:29 -04:00
select.c
Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-03-29 18:12:23 -07:00
seq_file.c
Merge tag 'module-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2012-03-24 10:24:31 -07:00
signalfd.c
switch signalfd4() to fget_light/fput_light
2012-05-29 23:28:30 -04:00
splice.c
fs: introduce inode operation ->update_time
2012-06-01 12:07:25 -04:00
stack.c
fs: reduce the use of module.h wherever possible
2012-02-28 19:31:58 -05:00
stat.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-05-23 17:42:39 -07:00
statfs.c
switch statfs to fget_light/fput_light
2012-05-29 23:28:31 -04:00
super.c
Merge tag 'module-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2012-03-24 10:24:31 -07:00
sync.c
switch do_fsync() to fget_light()
2012-05-29 23:28:29 -04:00
timerfd.c
…
utimes.c
switch utimes() to fget_light/fput_light
2012-05-29 23:28:32 -04:00
xattr_acl.c
fs: reduce the use of module.h wherever possible
2012-02-28 19:31:58 -05:00
xattr.c
switch xattr syscalls to fget_light/fput_light
2012-05-29 23:28:30 -04:00