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David Howells 4bf46a2726 VFS: Impose ordering on accesses of d_inode and d_flags 
Impose ordering on accesses of d_inode and d_flags to avoid the need to do
this:

	if (!dentry->d_inode || d_is_negative(dentry)) {

when this:

	if (d_is_negative(dentry)) {

should suffice.

This check is especially problematic if a dentry can have its type field set
to something other than DENTRY_MISS_TYPE when d_inode is NULL (as in
unionmount).

What we really need to do is stick a write barrier between setting d_inode and
setting d_flags and a read barrier between reading d_flags and reading
d_inode.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-04-15 15:05:28 -04:00
..
9p
switch generic_write_checks() to iocb and iter
2015-04-11 22:30:21 -04:00
adfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
affs
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
afs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
autofs4
autofs: switch to __vfs_write()
2015-04-11 22:29:37 -04:00
befs
fs/befs/linuxvfs.c: remove unnecessary casting
2015-02-17 14:34:50 -08:00
bfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
btrfs
mirror O_APPEND and O_DIRECT into iocb->ki_flags
2015-04-11 22:30:22 -04:00
cachefiles
Cachefiles: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions
2015-02-22 11:38:41 -05:00
ceph
mirror O_APPEND and O_DIRECT into iocb->ki_flags
2015-04-11 22:30:22 -04:00
cifs
switch generic_write_checks() to iocb and iter
2015-04-11 22:30:21 -04:00
coda
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
configfs
configfs: Fix potential NULL d_inode dereference
2015-02-20 04:56:43 -05:00
cramfs
fs/cramfs/inode.c: use linux/uaccess.h
2014-08-08 15:57:25 -07:00
debugfs
debugfs: leave freeing a symlink body until inode eviction
2015-02-22 11:38:43 -05:00
devpts
…
dlm
netlink: make nlmsg_end() and genlmsg_end() void
2015-01-18 01:03:45 -05:00
ecryptfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
efivarfs
* Move efivarfs from the misc filesystem section to pseudo filesystem,
2015-01-29 19:16:40 +01:00
efs
fs/efs/namei.c: return is not a function
2014-08-08 15:57:18 -07:00
exofs
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
exportfs
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
ext2
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
ext3
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
ext4
mirror O_APPEND and O_DIRECT into iocb->ki_flags
2015-04-11 22:30:22 -04:00
f2fs
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
fat
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
freevxfs
…
fscache
fs/fscache/object-list.c: use __seq_open_private()
2014-10-13 17:52:21 +01:00
fuse
mirror O_APPEND and O_DIRECT into iocb->ki_flags
2015-04-11 22:30:22 -04:00
gfs2
mirror O_APPEND and O_DIRECT into iocb->ki_flags
2015-04-11 22:30:22 -04:00
hfs
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
hfsplus
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
hostfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
hpfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
hppfs
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
hugetlbfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
isofs
isofs: Fix bug in the way to check if the year is a leap year
2015-01-07 09:51:49 +01:00
jbd
jbd: Deletion of an unnecessary check before the function call "iput"
2014-11-18 10:15:29 +01:00
jbd2
jbd2: complain about descriptor block checksum errors
2015-01-19 15:59:58 -05:00
jffs2
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
jfs
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
kernfs
kernfs: handle poll correctly on 'direct_read' files.
2015-03-16 21:51:20 +01:00
lockd
Merge branch 'for-3.20' of git://linux-nfs.org/~bfields/linux
2015-02-12 10:39:41 -08:00
logfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
minix
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
ncpfs
switch generic_write_checks() to iocb and iter
2015-04-11 22:30:21 -04:00
nfs
nfs: generic_write_checks() shouldn't be done on swapout...
2015-04-15 15:04:27 -04:00
nfs_common
lockd: move lockd's grace period handling into its own module
2014-09-17 16:33:11 -04:00
nfsd
nfsd: require an explicit option to enable pNFS
2015-03-30 16:05:26 -04:00
nilfs2
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
nls
…
notify
fanotify: fix event filtering with FAN_ONDIR set
2015-03-12 18:46:08 -07:00
ntfs
switch generic_write_checks() to iocb and iter
2015-04-11 22:30:21 -04:00
ocfs2
ocfs2: use __generic_file_write_iter()
2015-04-11 22:30:22 -04:00
omfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
openpromfs
…
overlayfs
ovl: upper fs should not be R/O
2015-03-18 10:29:48 +01:00
proc
pagemap: do not leak physical addresses to non-privileged userspace
2015-03-17 09:31:30 -07:00
pstore
pstore: Fix sprintf format specifier in pstore_dump()
2015-01-16 16:01:29 -08:00
qnx4
…
qnx6
fs/qnx6: update debugging to current functions
2014-08-08 15:57:26 -07:00
quota
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2015-02-10 15:52:38 -08:00
ramfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
reiserfs
direct_IO: remove rw from a_ops->direct_IO()
2015-04-11 22:29:45 -04:00
romfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
squashfs
Squashfs: Add LZ4 compression configuration option
2014-11-27 18:48:44 +00:00
sysfs
driver core patches for 3.20-rc1
2015-02-15 11:11:47 -08:00
sysv
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
ubifs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
udf
switch generic_write_checks() to iocb and iter
2015-04-11 22:30:21 -04:00
ufs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
xfs
mirror O_APPEND and O_DIRECT into iocb->ki_flags
2015-04-11 22:30:22 -04:00
aio.c
mirror O_APPEND and O_DIRECT into iocb->ki_flags
2015-04-11 22:30:22 -04:00
anon_inodes.c
…
attr.c
…
bad_inode.c
don't bother with most of the bad_file_ops methods
2015-02-20 04:03:58 -05:00
binfmt_aout.c
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
binfmt_elf_fdpic.c
handle suicide on late failure exits in execve() in search_binary_handler()
2014-10-09 02:39:00 -04:00
binfmt_elf.c
x86, mm/ASLR: Fix stack randomization on 64-bit systems
2015-02-19 12:21:36 +01:00
binfmt_em86.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
binfmt_flat.c
…
binfmt_misc.c
unfuck binfmt_misc.c (broken by commit e6084d4)
2014-12-17 08:27:14 -05:00
binfmt_script.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
block_dev.c
blkdev_write_iter: expand generic_file_checks() call in there
2015-04-11 22:29:48 -04:00
buffer.c
fs: clarify rate limit suppressed buffer I/O errors
2014-10-21 13:55:11 -06:00
char_dev.c
fs: introduce f_op->mmap_capabilities for nommu mmap support
2015-01-20 14:02:58 -07:00
compat_binfmt_elf.c
…
compat_ioctl.c
Bluetooth: bnep: Add support for get bnep features via ioctl
2015-04-03 23:21:34 +02:00
compat.c
vfs: make first argument of dir_context.actor typed
2014-10-31 17:48:54 -04:00
coredump.c
coredump: accept any write method
2015-04-11 22:29:39 -04:00
dax.c
Remove rw from dax_{do_,}io()
2015-04-11 22:29:44 -04:00
dcache.c
VFS: Impose ordering on accesses of d_inode and d_flags
2015-04-15 15:05:28 -04:00
dcookies.c
…
direct-io.c
Remove rw from {,__,do_}blockdev_direct_IO()
2015-04-11 22:29:44 -04:00
drop_caches.c
vmscan: per memory cgroup slab shrinkers
2015-02-12 18:54:09 -08:00
eventfd.c
eventfd: don't take the spinlock in eventfd_poll
2015-02-17 14:34:52 -08:00
eventpoll.c
epoll: optimize setting task running after blocking
2015-02-13 21:21:40 -08:00
exec.c
fs: create proper filename objects using getname_kernel()
2015-01-23 00:22:20 -05:00
fcntl.c
vfs: renumber FMODE_NONOTIFY and add to uniqueness check
2015-01-08 15:10:52 -08:00
fhandle.c
…
file_table.c
->aio_read and ->aio_write removed
2015-04-11 22:29:43 -04:00
file.c
fs/file.c: replace get_unused_fd() with get_unused_fd_flags(0)
2014-12-10 17:41:10 -08:00
filesystems.c
…
fs_pin.c
switch the IO-triggering parts of umount to fs_pin
2015-01-25 23:17:29 -05:00
fs_struct.c
…
fs-writeback.c
fs: add dirtytime_expire_seconds sysctl
2015-03-17 12:23:32 -04:00
inode.c
Merge branch 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-02-17 16:12:34 -08:00
internal.h
trylock_super(): replacement for grab_super_passive()
2015-02-22 11:38:42 -05:00
ioctl.c
fsioctl.c: make generic_block_fiemap() signal-tolerant
2015-02-10 14:30:30 -08:00
Kconfig
dax: does not work correctly with virtual aliasing caches
2015-02-16 17:56:04 -08:00
Kconfig.binfmt
fs/binfmt_som: Drop kernel support for HP-UX SOM binaries
2015-02-17 16:29:36 +01:00
libfs.c
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
locks.c
locks: fix file_lock deletion inside loop
2015-03-27 07:18:20 -04:00
Makefile
Merge branch 'parisc-3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
2015-02-17 14:25:58 -08:00
mbcache.c
…
mount.h
switch the IO-triggering parts of umount to fs_pin
2015-01-25 23:17:29 -05:00
mpage.c
vfs: guard end of device for mpage interface
2014-10-09 22:25:53 -04:00
namei.c
remove incorrect comment in lookup_one_len()
2015-04-11 22:24:30 -04:00
namespace.c
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
no-block.c
…
nsfs.c
take the targets of /proc/*/ns/* symlinks to separate fs
2014-12-10 21:30:20 -05:00
open.c
->aio_read and ->aio_write removed
2015-04-11 22:29:43 -04:00
pipe.c
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
pnode.c
mnt: Move the clear of MNT_LOCKED from copy_tree to it's callers.
2014-12-02 10:46:50 -06:00
pnode.h
…
posix_acl.c
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
2015-02-22 11:38:41 -05:00
proc_namespace.c
vfs: add support for a lazytime mount option
2015-02-05 02:45:00 -05:00
read_write.c
new_sync_write(): discard ->ki_pos unless the return value is positive
2015-04-11 22:29:46 -04:00
readdir.c
vfs: make first argument of dir_context.actor typed
2014-10-31 17:48:54 -04:00
select.c
all arches, signal: move restart_block to struct task_struct
2015-02-12 18:54:12 -08:00
seq_file.c
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
signalfd.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
splice.c
vmsplice_to_user(): switch to import_iovec()
2015-04-11 22:27:11 -04:00
stack.c
fs: fix comment for 'CONFIG_LBADF'
2014-08-26 09:35:56 +02:00
stat.c
switch security_inode_getattr() to struct path *
2015-04-11 22:24:32 -04:00
statfs.c
…
super.c
trylock_super(): replacement for grab_super_passive()
2015-02-22 11:38:42 -05:00
sync.c
vfs: add support for a lazytime mount option
2015-02-05 02:45:00 -05:00
timerfd.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
utimes.c
…
xattr.c
new helper: audit_file()
2014-11-19 13:01:26 -05:00