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Christian Brauner 68847c9417
namespace: take lock_mount_hash() directly when changing flags 
Changing mount options always ends up taking lock_mount_hash() but when
MNT_READONLY is requested and neither the mount nor the superblock are
MNT_READONLY we end up taking the lock, dropping it, and retaking it to
change the other mount attributes. Instead, let's acquire the lock once
when changing the mount attributes. This simplifies the locking in these
codepath, makes them easier to reason about and avoids having to
reacquire the lock right after dropping it.

Link: https://lore.kernel.org/r/20210121131959.646623-30-christian.brauner@ubuntu.com
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
2021-01-24 14:29:34 +01:00
..
9p
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
adfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
affs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
afs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
autofs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
befs
…
bfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
btrfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
cachefiles
namei: prepare for idmapped mounts
2021-01-24 14:27:18 +01:00
ceph
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
cifs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
coda
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
configfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
cramfs
…
crypto
inode: make init and permission helpers idmapped mount aware
2021-01-24 14:27:16 +01:00
debugfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
devpts
…
dlm
fs: dlm: check on existing node address
2020-11-10 12:14:20 -06:00
ecryptfs
ecryptfs: do not mount on top of idmapped mounts
2021-01-24 14:27:20 +01:00
efivarfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
efs
…
erofs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
exfat
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
exportfs
exportfs: Add a function to return the raw output from fh_to_dentry()
2020-12-09 09:39:38 -05:00
ext2
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
ext4
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
f2fs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
fat
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
freevxfs
…
fscache
…
fuse
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
gfs2
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
hfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
hfsplus
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
hostfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
hpfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
hugetlbfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
iomap
mm: memcontrol: Use helpers to read page's memcg data
2020-12-02 18:28:05 -08:00
isofs
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
jbd2
jbd2: add a helper to find out number of fast commit blocks
2020-12-17 13:30:45 -05:00
jffs2
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
jfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
kernfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
lockd
fs/lockd: convert comma to semicolon
2020-12-16 07:57:37 -05:00
minix
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
nfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
nfs_common
nfs_common: need lock during iterate through the list
2020-12-09 09:38:34 -05:00
nfsd
nfs: do not export idmapped mounts
2021-01-24 14:29:33 +01:00
nilfs2
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
nls
…
notify
fs: add file and path permissions helpers
2021-01-24 14:27:16 +01:00
ntfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
ocfs2
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
omfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
openpromfs
…
orangefs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
overlayfs
overlayfs: do not mount on top of idmapped mounts
2021-01-24 14:27:20 +01:00
proc
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
pstore
Tracing updates for 5.11
2020-12-17 13:22:17 -08:00
qnx4
…
qnx6
…
quota
\n
2020-12-17 11:00:37 -08:00
ramfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
reiserfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
romfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
squashfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
sysfs
…
sysv
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
tracefs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
ubifs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
udf
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
ufs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
unicode
…
vboxsf
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
verity
fs: add file and path permissions helpers
2021-01-24 14:27:16 +01:00
xfs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
zonefs
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
aio.c
Merge branch 'akpm' (patches from Andrew)
2020-12-15 12:53:37 -08:00
anon_inodes.c
…
attr.c
ima: handle idmapped mounts
2021-01-24 14:27:20 +01:00
bad_inode.c
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
binfmt_aout.c
…
binfmt_elf_fdpic.c
binfmt_elf, binfmt_elf_fdpic: use a VMA list snapshot
2020-10-16 11:11:21 -07:00
binfmt_elf.c
Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:29:43 -08:00
binfmt_em86.c
…
binfmt_flat.c
…
binfmt_misc.c
…
binfmt_script.c
…
block_dev.c
block: pre-initialize struct block_device in bdev_alloc_inode
2021-01-07 20:57:53 -07:00
buffer.c
for-5.11/block-2020-12-14
2020-12-16 12:57:51 -08:00
char_dev.c
…
compat_binfmt_elf.c
elf: Expose ELF header on arch_setup_additional_pages()
2020-10-26 13:46:47 +01:00
coredump.c
open: handle idmapped mounts in do_truncate()
2021-01-24 14:27:18 +01:00
d_path.c
fs: fix NULL dereference due to data race in prepend_path()
2020-10-14 14:54:45 -07:00
dax.c
mm: simplify follow_pte{,pmd}
2020-12-15 22:46:19 -08:00
dcache.c
fs: Kill DCACHE_DONTCACHE dentry even if DCACHE_REFERENCED is set
2020-12-10 17:33:17 -05:00
dcookies.c
…
direct-io.c
\n
2020-10-15 15:03:10 -07:00
drop_caches.c
…
eventfd.c
eventfd: Export eventfd_ctx_do_read()
2020-11-15 09:49:10 -05:00
eventpoll.c
epoll: add syscall epoll_pwait2
2020-12-19 11:18:38 -08:00
exec.c
exec: handle idmapped mounts
2021-01-24 14:27:19 +01:00
fcntl.c
fcntl: handle idmapped mounts
2021-01-24 14:27:19 +01:00
fhandle.c
…
file_table.c
epoll: take epitem list out of struct file
2020-10-25 20:02:08 -04:00
file.c
kernel/io_uring: cancel io_uring before task works
2020-12-30 19:36:54 -07:00
filesystems.c
…
fs_context.c
…
fs_parser.c
fs_parse: mark fs_param_bad_value() as static
2020-10-13 18:38:27 -07:00
fs_pin.c
…
fs_struct.c
…
fs_types.c
…
fs-writeback.c
writeback: don't warn on an unregistered BDI in __mark_inode_dirty
2020-12-16 11:56:02 +01:00
fsopen.c
…
init.c
init: handle idmapped mounts
2021-01-24 14:27:19 +01:00
inode.c
open: handle idmapped mounts in do_truncate()
2021-01-24 14:27:18 +01:00
internal.h
namei: handle idmapped mounts in may_*() helpers
2021-01-24 14:27:17 +01:00
io_uring.c
io_uring: ensure finish_wait() is always called in __io_uring_task_cancel()
2021-01-15 16:04:23 -07:00
io-wq.c
io-wq: kill now unused io_wq_cancel_all()
2020-12-20 10:47:42 -07:00
io-wq.h
io-wq: kill now unused io_wq_cancel_all()
2020-12-20 10:47:42 -07:00
ioctl.c
…
Kconfig
…
Kconfig.binfmt
…
kernel_read_file.c
…
libfs.c
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
locks.c
Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:29:43 -08:00
Makefile
Refactored code for 5.10:
2020-10-23 11:33:41 -07:00
mbcache.c
…
mount.h
…
mpage.c
…
namei.c
ima: handle idmapped mounts
2021-01-24 14:27:20 +01:00
namespace.c
namespace: take lock_mount_hash() directly when changing flags
2021-01-24 14:29:34 +01:00
no-block.c
…
nsfs.c
…
open.c
open: handle idmapped mounts
2021-01-24 14:27:18 +01:00
pipe.c
block: remove i_bdev
2020-12-01 14:53:39 -07:00
pnode.c
…
pnode.h
fs/namespace.c: WARN if mnt_count has become negative
2020-12-10 17:33:17 -05:00
posix_acl.c
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
proc_namespace.c
proc mountinfo: make splice available again
2020-12-27 12:00:36 -08:00
read_write.c
Refactored code for 5.10:
2020-10-23 11:33:41 -07:00
readdir.c
…
remap_range.c
ioctl: handle idmapped mounts
2021-01-24 14:27:19 +01:00
select.c
poll: fix performance regression due to out-of-line __put_user()
2021-01-08 11:06:29 -08:00
seq_file.c
fix return values of seq_read_iter()
2020-11-15 22:12:53 -05:00
signalfd.c
…
splice.c
io_uring-5.10-2020-10-24
2020-10-24 12:40:18 -07:00
stack.c
…
stat.c
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
statfs.c
block: remove i_bdev
2020-12-01 14:53:39 -07:00
super.c
block: remove i_bdev
2020-12-01 14:53:39 -07:00
sync.c
…
timerfd.c
…
userfaultfd.c
userfaultfd: add user-mode only option to unprivileged_userfaultfd sysctl knob
2020-12-15 12:13:46 -08:00
utimes.c
utimes: handle idmapped mounts
2021-01-24 14:27:18 +01:00
xattr.c
namei: handle idmapped mounts in may_*() helpers
2021-01-24 14:27:17 +01:00