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Eric W. Biederman fbabfd0f4e fs: Add helper functions for permanently empty directories. 
To ensure it is safe to mount proc and sysfs I need to check if
filesystems that are mounted on top of them are mounted on truly empty
directories.  Given that some directories can gain entries over time,
knowing that a directory is empty right now is insufficient.

Therefore add supporting infrastructure for permantently empty
directories that proc and sysfs can use when they create mount points
for filesystems and fs_fully_visible can use to test for permanently
empty directories to ensure that nothing will be gained by mounting a
fresh copy of proc or sysfs.

Cc: stable@vger.kernel.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2015-07-01 10:36:37 -05:00
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9p
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
adfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
affs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
afs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
autofs4
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
befs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
bfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
btrfs
Merge branch 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
2015-04-26 17:40:30 -07:00
cachefiles
VFS: fs/cachefiles: d_backing_inode() annotations
2015-04-15 15:06:59 -04:00
ceph
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
cifs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
coda
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
configfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
cramfs
…
debugfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
devpts
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
dlm
netlink: make nlmsg_end() and genlmsg_end() void
2015-01-18 01:03:45 -05:00
ecryptfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
efivarfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
efs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
exofs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -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
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
ext3
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
ext4
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
f2fs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
fat
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
freevxfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
fscache
…
fuse
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
gfs2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
hfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
hfsplus
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
hostfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
hpfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
hppfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
hugetlbfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
isofs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
jbd
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jbd2
jbd2: complain about descriptor block checksum errors
2015-01-19 15:59:58 -05:00
jffs2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
jfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
kernfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
lockd
nfsd: eliminate NFSD_DEBUG
2015-04-21 16:16:02 -04:00
logfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
minix
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
ncpfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
nfs
NFS client updates for Linux 4.1
2015-04-26 17:33:59 -07:00
nfs_common
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nfsd
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
nilfs2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
nls
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notify
fanotify: fix event filtering with FAN_ONDIR set
2015-03-12 18:46:08 -07:00
ntfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
ocfs2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
omfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
openpromfs
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overlayfs
ovl: upper fs should not be R/O
2015-03-18 10:29:48 +01:00
proc
mnt: Refactor the logic for mounting sysfs and proc in a user namespace
2015-05-13 21:44:11 -05:00
pstore
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
qnx4
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qnx6
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
quota
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
ramfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
reiserfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
romfs
make new_sync_{read,write}() static
2015-04-11 22:29:40 -04:00
squashfs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
sysfs
mnt: Refactor the logic for mounting sysfs and proc in a user namespace
2015-05-13 21:44:11 -05:00
sysv
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
tracefs
tracing: Have mkdir and rmdir be part of tracefs
2015-02-03 12:48:43 -05:00
ubifs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
udf
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
ufs
VFS: normal filesystems (and lustre): d_inode() annotations
2015-04-15 15:06:57 -04:00
xfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
aio.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-16 23:27:56 -04:00
anon_inodes.c
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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
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binfmt_elf_fdpic.c
…
binfmt_elf.c
mm: fold arch_randomize_brk into ARCH_HAS_ELF_RANDOMIZE
2015-04-14 16:49:05 -07:00
binfmt_em86.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
binfmt_flat.c
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binfmt_misc.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
binfmt_script.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
block_dev.c
direct-io: only inc/dec inode->i_dio_count for file systems
2015-04-24 15:45:28 -04:00
buffer.c
page_writeback: clean up mess around cancel_dirty_page()
2015-04-14 16:49:01 -07:00
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
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compat_ioctl.c
Bluetooth: bnep: Add support for get bnep features via ioctl
2015-04-03 23:21:34 +02:00
compat.c
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coredump.c
coredump: accept any write method
2015-04-11 22:29:39 -04:00
dax.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2015-04-26 17:22:07 -07:00
dcache.c
VFS: Impose ordering on accesses of d_inode and d_flags
2015-04-15 15:05:28 -04:00
dcookies.c
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direct-io.c
direct-io: only inc/dec inode->i_dio_count for file systems
2015-04-24 15:45:28 -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: take i_mutex during prepare_binprm for set[ug]id executables
2015-04-19 13:46:21 -07:00
fcntl.c
vfs: renumber FMODE_NONOTIFY and add to uniqueness check
2015-01-08 15:10:52 -08:00
fhandle.c
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file_table.c
->aio_read and ->aio_write removed
2015-04-11 22:29:43 -04:00
file.c
mm: rcu-protected get_mm_exe_file()
2015-04-17 09:04:07 -04:00
filesystems.c
…
fs_pin.c
fs_pin: Allow for the possibility that m_list or s_list go unused.
2015-04-09 11:39:55 -05:00
fs_struct.c
…
fs-writeback.c
fs: add dirtytime_expire_seconds sysctl
2015-03-17 12:23:32 -04:00
inode.c
direct-io: only inc/dec inode->i_dio_count for file systems
2015-04-24 15:45:28 -04:00
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
f2fs: relocate Kconfig from misc filesystems
2015-04-10 15:08:35 -07:00
Kconfig.binfmt
mm: split ET_DYN ASLR from mmap ASLR
2015-04-14 16:49:05 -07:00
libfs.c
fs: Add helper functions for permanently empty directories.
2015-07-01 10:36:37 -05:00
locks.c
proc: show locks in /proc/pid/fdinfo/X
2015-04-17 09:04:12 -04:00
Makefile
This adds the new tracefs file system. This has been in linux-next for
2015-04-14 10:22:29 -07:00
mbcache.c
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mount.h
switch the IO-triggering parts of umount to fs_pin
2015-01-25 23:17:29 -05:00
mpage.c
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namei.c
RCU pathwalk breakage when running into a symlink overmounting something
2015-04-24 15:52:14 -04:00
namespace.c
vfs: Ignore unlocked mounts in fs_fully_visible
2015-07-01 10:36:35 -05:00
no-block.c
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nsfs.c
VFS: assorted weird filesystems: d_inode() annotations
2015-04-15 15:06:58 -04:00
open.c
xfs: update for 4.1-rc1
2015-04-24 07:08:41 -07:00
pipe.c
VFS: assorted weird filesystems: d_inode() annotations
2015-04-15 15:06:58 -04:00
pnode.c
mnt: Don't propagate unmounts to locked mounts
2015-04-02 20:34:20 -05:00
pnode.h
mnt: Honor MNT_LOCKED when detaching mounts
2015-04-09 11:39:55 -05:00
posix_acl.c
VFS: assorted d_backing_inode() annotations
2015-04-15 15:06:59 -04:00
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
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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
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splice.c
dax: unify ext2/4_{dax,}_file_operations
2015-04-15 16:35:20 -07:00
stack.c
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stat.c
VFS: assorted d_backing_inode() annotations
2015-04-15 15:06:59 -04:00
statfs.c
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super.c
cleancache: remove limit on the number of cleancache enabled filesystems
2015-04-14 16:49:03 -07:00
sync.c
vfs: add support for a lazytime mount option
2015-02-05 02:45:00 -05:00
timerfd.c
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utimes.c
…
xattr.c
…