Shin'ichiro Kawasaki e804861bd4 btrfs: fix deadlock between quota disable and qgroup rescan worker ... Quota disable ioctl starts a transaction before waiting for the qgroup rescan worker completes. However, this wait can be infinite and results in deadlock because of circular dependency among the quota disable ioctl, the qgroup rescan worker and the other task with transaction such as block group relocation task. The deadlock happens with the steps following: 1) Task A calls ioctl to disable quota. It starts a transaction and waits for qgroup rescan worker completes. 2) Task B such as block group relocation task starts a transaction and joins to the transaction that task A started. Then task B commits to the transaction. In this commit, task B waits for a commit by task A. 3) Task C as the qgroup rescan worker starts its job and starts a transaction. In this transaction start, task C waits for completion of the transaction that task A started and task B committed. This deadlock was found with fstests test case btrfs/115 and a zoned null_blk device. The test case enables and disables quota, and the block group reclaim was triggered during the quota disable by chance. The deadlock was also observed by running quota enable and disable in parallel with 'btrfs balance' command on regular null_blk devices. An example report of the deadlock: [372.469894] INFO: task kworker/u16:6:103 blocked for more than 122 seconds. [372.479944] Not tainted 5.16.0-rc8 #7 [372.485067] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [372.493898] task:kworker/u16:6 state:D stack: 0 pid: 103 ppid: 2 flags:0x00004000 [372.503285] Workqueue: btrfs-qgroup-rescan btrfs_work_helper [btrfs] [372.510782] Call Trace: [372.514092] <TASK> [372.521684] __schedule+0xb56/0x4850 [372.530104] ? io_schedule_timeout+0x190/0x190 [372.538842] ? lockdep_hardirqs_on+0x7e/0x100 [372.547092] ? _raw_spin_unlock_irqrestore+0x3e/0x60 [372.555591] schedule+0xe0/0x270 [372.561894] btrfs_commit_transaction+0x18bb/0x2610 [btrfs] [372.570506] ? btrfs_apply_pending_changes+0x50/0x50 [btrfs] [372.578875] ? free_unref_page+0x3f2/0x650 [372.585484] ? finish_wait+0x270/0x270 [372.591594] ? release_extent_buffer+0x224/0x420 [btrfs] [372.599264] btrfs_qgroup_rescan_worker+0xc13/0x10c0 [btrfs] [372.607157] ? lock_release+0x3a9/0x6d0 [372.613054] ? btrfs_qgroup_account_extent+0xda0/0xda0 [btrfs] [372.620960] ? do_raw_spin_lock+0x11e/0x250 [372.627137] ? rwlock_bug.part.0+0x90/0x90 [372.633215] ? lock_is_held_type+0xe4/0x140 [372.639404] btrfs_work_helper+0x1ae/0xa90 [btrfs] [372.646268] process_one_work+0x7e9/0x1320 [372.652321] ? lock_release+0x6d0/0x6d0 [372.658081] ? pwq_dec_nr_in_flight+0x230/0x230 [372.664513] ? rwlock_bug.part.0+0x90/0x90 [372.670529] worker_thread+0x59e/0xf90 [372.676172] ? process_one_work+0x1320/0x1320 [372.682440] kthread+0x3b9/0x490 [372.687550] ? _raw_spin_unlock_irq+0x24/0x50 [372.693811] ? set_kthread_struct+0x100/0x100 [372.700052] ret_from_fork+0x22/0x30 [372.705517] </TASK> [372.709747] INFO: task btrfs-transacti:2347 blocked for more than 123 seconds. [372.729827] Not tainted 5.16.0-rc8 #7 [372.745907] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [372.767106] task:btrfs-transacti state:D stack: 0 pid: 2347 ppid: 2 flags:0x00004000 [372.787776] Call Trace: [372.801652] <TASK> [372.812961] __schedule+0xb56/0x4850 [372.830011] ? io_schedule_timeout+0x190/0x190 [372.852547] ? lockdep_hardirqs_on+0x7e/0x100 [372.871761] ? _raw_spin_unlock_irqrestore+0x3e/0x60 [372.886792] schedule+0xe0/0x270 [372.901685] wait_current_trans+0x22c/0x310 [btrfs] [372.919743] ? btrfs_put_transaction+0x3d0/0x3d0 [btrfs] [372.938923] ? finish_wait+0x270/0x270 [372.959085] ? join_transaction+0xc75/0xe30 [btrfs] [372.977706] start_transaction+0x938/0x10a0 [btrfs] [372.997168] transaction_kthread+0x19d/0x3c0 [btrfs] [373.013021] ? btrfs_cleanup_transaction.isra.0+0xfc0/0xfc0 [btrfs] [373.031678] kthread+0x3b9/0x490 [373.047420] ? _raw_spin_unlock_irq+0x24/0x50 [373.064645] ? set_kthread_struct+0x100/0x100 [373.078571] ret_from_fork+0x22/0x30 [373.091197] </TASK> [373.105611] INFO: task btrfs:3145 blocked for more than 123 seconds. [373.114147] Not tainted 5.16.0-rc8 #7 [373.120401] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [373.130393] task:btrfs state:D stack: 0 pid: 3145 ppid: 3141 flags:0x00004000 [373.140998] Call Trace: [373.145501] <TASK> [373.149654] __schedule+0xb56/0x4850 [373.155306] ? io_schedule_timeout+0x190/0x190 [373.161965] ? lockdep_hardirqs_on+0x7e/0x100 [373.168469] ? _raw_spin_unlock_irqrestore+0x3e/0x60 [373.175468] schedule+0xe0/0x270 [373.180814] wait_for_commit+0x104/0x150 [btrfs] [373.187643] ? test_and_set_bit+0x20/0x20 [btrfs] [373.194772] ? kmem_cache_free+0x124/0x550 [373.201191] ? btrfs_put_transaction+0x69/0x3d0 [btrfs] [373.208738] ? finish_wait+0x270/0x270 [373.214704] ? __btrfs_end_transaction+0x347/0x7b0 [btrfs] [373.222342] btrfs_commit_transaction+0x44d/0x2610 [btrfs] [373.230233] ? join_transaction+0x255/0xe30 [btrfs] [373.237334] ? btrfs_record_root_in_trans+0x4d/0x170 [btrfs] [373.245251] ? btrfs_apply_pending_changes+0x50/0x50 [btrfs] [373.253296] relocate_block_group+0x105/0xc20 [btrfs] [373.260533] ? mutex_lock_io_nested+0x1270/0x1270 [373.267516] ? btrfs_wait_nocow_writers+0x85/0x180 [btrfs] [373.275155] ? merge_reloc_roots+0x710/0x710 [btrfs] [373.283602] ? btrfs_wait_ordered_extents+0xd30/0xd30 [btrfs] [373.291934] ? kmem_cache_free+0x124/0x550 [373.298180] btrfs_relocate_block_group+0x35c/0x930 [btrfs] [373.306047] btrfs_relocate_chunk+0x85/0x210 [btrfs] [373.313229] btrfs_balance+0x12f4/0x2d20 [btrfs] [373.320227] ? lock_release+0x3a9/0x6d0 [373.326206] ? btrfs_relocate_chunk+0x210/0x210 [btrfs] [373.333591] ? lock_is_held_type+0xe4/0x140 [373.340031] ? rcu_read_lock_sched_held+0x3f/0x70 [373.346910] btrfs_ioctl_balance+0x548/0x700 [btrfs] [373.354207] btrfs_ioctl+0x7f2/0x71b0 [btrfs] [373.360774] ? lockdep_hardirqs_on_prepare+0x410/0x410 [373.367957] ? lockdep_hardirqs_on_prepare+0x410/0x410 [373.375327] ? btrfs_ioctl_get_supported_features+0x20/0x20 [btrfs] [373.383841] ? find_held_lock+0x2c/0x110 [373.389993] ? lock_release+0x3a9/0x6d0 [373.395828] ? mntput_no_expire+0xf7/0xad0 [373.402083] ? lock_is_held_type+0xe4/0x140 [373.408249] ? vfs_fileattr_set+0x9f0/0x9f0 [373.414486] ? selinux_file_ioctl+0x349/0x4e0 [373.420938] ? trace_raw_output_lock+0xb4/0xe0 [373.427442] ? selinux_inode_getsecctx+0x80/0x80 [373.434224] ? lockdep_hardirqs_on+0x7e/0x100 [373.440660] ? force_qs_rnp+0x2a0/0x6b0 [373.446534] ? lock_is_held_type+0x9b/0x140 [373.452763] ? __blkcg_punt_bio_submit+0x1b0/0x1b0 [373.459732] ? security_file_ioctl+0x50/0x90 [373.466089] __x64_sys_ioctl+0x127/0x190 [373.472022] do_syscall_64+0x3b/0x90 [373.477513] entry_SYSCALL_64_after_hwframe+0x44/0xae [373.484823] RIP: 0033:0x7f8f4af7e2bb [373.490493] RSP: 002b:00007ffcbf936178 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [373.500197] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8f4af7e2bb [373.509451] RDX: 00007ffcbf936220 RSI: 00000000c4009420 RDI: 0000000000000003 [373.518659] RBP: 00007ffcbf93774a R08: 0000000000000013 R09: 00007f8f4b02d4e0 [373.527872] R10: 00007f8f4ae87740 R11: 0000000000000246 R12: 0000000000000001 [373.537222] R13: 00007ffcbf936220 R14: 0000000000000000 R15: 0000000000000002 [373.546506] </TASK> [373.550878] INFO: task btrfs:3146 blocked for more than 123 seconds. [373.559383] Not tainted 5.16.0-rc8 #7 [373.565748] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [373.575748] task:btrfs state:D stack: 0 pid: 3146 ppid: 2168 flags:0x00000000 [373.586314] Call Trace: [373.590846] <TASK> [373.595121] __schedule+0xb56/0x4850 [373.600901] ? __lock_acquire+0x23db/0x5030 [373.607176] ? io_schedule_timeout+0x190/0x190 [373.613954] schedule+0xe0/0x270 [373.619157] schedule_timeout+0x168/0x220 [373.625170] ? usleep_range_state+0x150/0x150 [373.631653] ? mark_held_locks+0x9e/0xe0 [373.637767] ? do_raw_spin_lock+0x11e/0x250 [373.643993] ? lockdep_hardirqs_on_prepare+0x17b/0x410 [373.651267] ? _raw_spin_unlock_irq+0x24/0x50 [373.657677] ? lockdep_hardirqs_on+0x7e/0x100 [373.664103] wait_for_completion+0x163/0x250 [373.670437] ? bit_wait_timeout+0x160/0x160 [373.676585] btrfs_quota_disable+0x176/0x9a0 [btrfs] [373.683979] ? btrfs_quota_enable+0x12f0/0x12f0 [btrfs] [373.691340] ? down_write+0xd0/0x130 [373.696880] ? down_write_killable+0x150/0x150 [373.703352] btrfs_ioctl+0x3945/0x71b0 [btrfs] [373.710061] ? find_held_lock+0x2c/0x110 [373.716192] ? lock_release+0x3a9/0x6d0 [373.722047] ? __handle_mm_fault+0x23cd/0x3050 [373.728486] ? btrfs_ioctl_get_supported_features+0x20/0x20 [btrfs] [373.737032] ? set_pte+0x6a/0x90 [373.742271] ? do_raw_spin_unlock+0x55/0x1f0 [373.748506] ? lock_is_held_type+0xe4/0x140 [373.754792] ? vfs_fileattr_set+0x9f0/0x9f0 [373.761083] ? selinux_file_ioctl+0x349/0x4e0 [373.767521] ? selinux_inode_getsecctx+0x80/0x80 [373.774247] ? __up_read+0x182/0x6e0 [373.780026] ? count_memcg_events.constprop.0+0x46/0x60 [373.787281] ? up_write+0x460/0x460 [373.792932] ? security_file_ioctl+0x50/0x90 [373.799232] __x64_sys_ioctl+0x127/0x190 [373.805237] do_syscall_64+0x3b/0x90 [373.810947] entry_SYSCALL_64_after_hwframe+0x44/0xae [373.818102] RIP: 0033:0x7f1383ea02bb [373.823847] RSP: 002b:00007fffeb4d71f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [373.833641] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1383ea02bb [373.842961] RDX: 00007fffeb4d7210 RSI: 00000000c0109428 RDI: 0000000000000003 [373.852179] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078 [373.861408] R10: 00007f1383daec78 R11: 0000000000000202 R12: 00007fffeb4d874a [373.870647] R13: 0000000000493099 R14: 0000000000000001 R15: 0000000000000000 [373.879838] </TASK> [373.884018] Showing all locks held in the system: [373.894250] 3 locks held by kworker/4:1/58: [373.900356] 1 lock held by khungtaskd/63: [373.906333] #0: ffffffff8945ff60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [373.917307] 3 locks held by kworker/u16:6/103: [373.923938] #0: ffff888127b4f138 ((wq_completion)btrfs-qgroup-rescan){+.+.}-{0:0}, at: process_one_work+0x712/0x1320 [373.936555] #1: ffff88810b817dd8 ((work_completion)(&work->normal_work)){+.+.}-{0:0}, at: process_one_work+0x73f/0x1320 [373.951109] #2: ffff888102dd4650 (sb_internal#2){.+.+}-{0:0}, at: btrfs_qgroup_rescan_worker+0x1f6/0x10c0 [btrfs] [373.964027] 2 locks held by less/1803: [373.969982] #0: ffff88813ed56098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 [373.981295] #1: ffffc90000b3b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9e2/0x1060 [373.992969] 1 lock held by btrfs-transacti/2347: [373.999893] #0: ffff88813d4887a8 (&fs_info->transaction_kthread_mutex){+.+.}-{3:3}, at: transaction_kthread+0xe3/0x3c0 [btrfs] [374.015872] 3 locks held by btrfs/3145: [374.022298] #0: ffff888102dd4460 (sb_writers#18){.+.+}-{0:0}, at: btrfs_ioctl_balance+0xc3/0x700 [btrfs] [374.034456] #1: ffff88813d48a0a0 (&fs_info->reclaim_bgs_lock){+.+.}-{3:3}, at: btrfs_balance+0xfe5/0x2d20 [btrfs] [374.047646] #2: ffff88813d488838 (&fs_info->cleaner_mutex){+.+.}-{3:3}, at: btrfs_relocate_block_group+0x354/0x930 [btrfs] [374.063295] 4 locks held by btrfs/3146: [374.069647] #0: ffff888102dd4460 (sb_writers#18){.+.+}-{0:0}, at: btrfs_ioctl+0x38b1/0x71b0 [btrfs] [374.081601] #1: ffff88813d488bb8 (&fs_info->subvol_sem){+.+.}-{3:3}, at: btrfs_ioctl+0x38fd/0x71b0 [btrfs] [374.094283] #2: ffff888102dd4650 (sb_internal#2){.+.+}-{0:0}, at: btrfs_quota_disable+0xc8/0x9a0 [btrfs] [374.106885] #3: ffff88813d489800 (&fs_info->qgroup_ioctl_lock){+.+.}-{3:3}, at: btrfs_quota_disable+0xd5/0x9a0 [btrfs] [374.126780] ============================================= To avoid the deadlock, wait for the qgroup rescan worker to complete before starting the transaction for the quota disable ioctl. Clear BTRFS_FS_QUOTA_ENABLE flag before the wait and the transaction to request the worker to complete. On transaction start failure, set the BTRFS_FS_QUOTA_ENABLE flag again. These BTRFS_FS_QUOTA_ENABLE flag changes can be done safely since the function btrfs_quota_disable is not called concurrently because of fs_info->subvol_sem. Also check the BTRFS_FS_QUOTA_ENABLE flag in qgroup_rescan_init to avoid another qgroup rescan worker to start after the previous qgroup worker completed. CC: stable@vger.kernel.org # 5.4+ Suggested-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> Signed-off-by: David Sterba <dsterba@suse.com>		2022-01-31 16:05:44 +01:00
..
9p	netfs, 9p, afs, ceph: Use folios	2021-11-10 21:16:56 +00:00
adfs	mm: require ->set_page_dirty to be explicitly wired up	2021-06-29 10:53:48 -07:00
affs	affs: use bdev_nr_sectors instead of open coding it	2021-10-18 14:43:22 -06:00
afs	afs: Fix mmap	2021-12-16 09:10:13 -08:00
autofs	autofs: fix wait name hash calculation in autofs_wait()	2021-10-20 21:09:02 -04:00
befs	isystem: ship and use stdarg.h	2021-08-19 09:02:55 +09:00
bfs	mm: require ->set_page_dirty to be explicitly wired up	2021-06-29 10:53:48 -07:00
btrfs	btrfs: fix deadlock between quota disable and qgroup rescan worker	2022-01-31 16:05:44 +01:00
cachefiles	for-5.16/ki_complete-2021-10-29	2021-11-01 10:17:11 -07:00
ceph	ceph: fix up non-directory creation in SGID directories	2021-12-01 17:08:27 +01:00
cifs	cifs: sanitize multiple delimiters in prepath	2021-12-17 19:16:49 -06:00
coda	coda: bump module version to 7.2	2021-11-09 10:02:51 -08:00
configfs	configfs: fix a race in configfs_lookup()	2021-08-25 07:58:49 +02:00
cramfs	cramfs: use bdev_nr_bytes instead of open coding it	2021-10-18 14:43:22 -06:00
crypto	fscrypt: improve a few comments	2021-10-25 19:11:50 -07:00
debugfs	debugfs: debugfs_create_file_size(): use IS_ERR to check for error	2021-09-21 09:09:06 +02:00
devpts
dlm	fs: dlm: avoid comms shutdown delay in release_lockspace	2021-09-01 11:29:14 -05:00
ecryptfs	mm: require ->set_page_dirty to be explicitly wired up	2021-06-29 10:53:48 -07:00
efivarfs	efivars: convert to fileattr	2021-04-12 15:04:29 +02:00
efs
erofs	erofs: fix deadlock when shrink erofs slab	2021-11-23 14:58:16 +08:00
exfat	exfat: fix incorrect loading of i_blocks for large files	2021-11-01 07:49:21 +09:00
exportfs
ext2	ext2: fix sleeping in atomic bugs on error	2021-09-22 13:05:23 +02:00
ext4	Only bug fixes and cleanups for ext4 this merge window. Of note are	2021-11-10 17:05:37 -08:00
f2fs	Update to zstd-1.4.10	2021-11-13 15:32:30 -08:00
fat	for-5.16/inode-sync-2021-10-29	2021-11-01 10:25:27 -07:00
freevxfs
fscache	fscache: Remove an unused static variable	2021-10-04 22:13:12 +01:00
fuse	fuse: release pipe buf after last use	2021-11-25 14:05:18 +01:00
gfs2	gfs2: gfs2_create_inode rework	2021-12-02 12:41:10 +01:00
hfs	Merge branch 'akpm' (patches from Andrew)	2021-11-09 10:11:53 -08:00
hfsplus	Merge branch 'akpm' (patches from Andrew)	2021-11-09 10:11:53 -08:00
hostfs	hostfs: support splice_write	2021-08-26 22:28:02 +02:00
hpfs	treewide: Replace open-coded flex arrays in unions	2021-10-18 12:28:53 -07:00
hugetlbfs	mm,hugetlb: remove mlock ulimit for SHM_HUGETLB	2021-11-09 10:02:48 -08:00
iomap	iomap: iomap_read_inline_data cleanup	2021-11-24 10:15:47 -08:00
isofs	isofs: Fix out of bound access for corrupted isofs image	2021-10-19 12:51:02 +02:00
jbd2	jbd2: add sparse annotations for add_transaction_credits()	2021-08-30 23:36:50 -04:00
jffs2	vfs: add rcu argument to ->get_acl() callback	2021-08-18 22:08:24 +02:00
jfs	Just one JFS patch	2021-11-03 09:23:25 -07:00
kernfs	Merge 5.15-rc6 into driver-core-next	2021-10-18 09:43:37 +02:00
ksmbd	ksmbd: disable SMB2_GLOBAL_CAP_ENCRYPTION for SMB 3.1.1	2021-12-17 19:19:45 -06:00
lockd	A slow cycle for nfsd: mainly cleanup, including Neil's patch dropping	2021-11-10 16:45:54 -08:00
minix	mm: require ->set_page_dirty to be explicitly wired up	2021-06-29 10:53:48 -07:00
netfs	netfs: fix parameter of cleanup()	2021-12-07 15:47:09 +00:00
nfs	NFS client bugfixes for Linux 5.16	2021-11-27 10:33:55 -08:00
nfs_common	nfs: Fix kerneldoc warning shown up by W=1	2021-10-04 22:02:17 +01:00
nfsd	NFSD: Fix READDIR buffer overflow	2021-12-18 17:11:06 -05:00
nilfs2	Merge branch 'akpm' (patches from Andrew)	2021-11-09 10:11:53 -08:00
nls
notify	fanotify: Allow users to request FAN_FS_ERROR events	2021-10-27 12:53:45 +02:00
ntfs	fs: ntfs: Limit NTFS_RW to page sizes smaller than 64k	2021-11-27 14:34:41 -08:00
ntfs3	gfs2: Fix mmap + page fault deadlocks	2021-11-02 12:25:03 -07:00
ocfs2	Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2021-11-10 16:15:54 -08:00
omfs	mm: require ->set_page_dirty to be explicitly wired up	2021-06-29 10:53:48 -07:00
openpromfs
orangefs	orangefs: three fixes from other folks...	2021-11-09 10:34:06 -08:00
overlayfs	overlayfs update for 5.16	2021-11-09 10:51:12 -08:00
proc	proc/vmcore: fix clearing user buffer by properly using clear_user()	2021-11-20 10:35:55 -08:00
pstore	pstore/blk: Use "%lu" to format unsigned long	2021-11-21 09:44:19 -08:00
qnx4	qnx4: work around gcc false positive warning bug	2021-09-21 08:36:48 -07:00
qnx6
quota	\n	2021-11-06 16:40:48 -07:00
ramfs	Merge branch 'akpm' (patches from Andrew)	2021-11-09 10:11:53 -08:00
reiserfs	\n	2021-11-06 16:40:48 -07:00
romfs
smbfs_common	cifs: Fix crash on unload of cifs_arc4.ko	2021-12-07 22:38:03 -06:00
squashfs	lib: zstd: Add kernel-specific API	2021-11-08 16:55:21 -08:00
sysfs	fs/sysfs/dir.c: replace S_IRWXU|S_IRUGO|S_IXUGO with 0755 sysfs_create_dir_ns()	2021-10-05 16:35:05 +02:00
sysv	sysv: use BUILD_BUG_ON instead of runtime check	2021-11-09 10:02:52 -08:00
tracefs	tracefs: Set all files to the same group ownership as the mount option	2021-12-08 08:06:40 -05:00
ubifs	fscrypt: remove fscrypt_operations::max_namelen	2021-09-20 19:32:33 -07:00
udf	udf: Fix crash after seekdir	2021-11-09 12:53:58 +01:00
ufs	isystem: ship and use stdarg.h	2021-08-19 09:02:55 +09:00
unicode	.gitignore: prefix local generated files with a slash	2021-05-02 00:43:35 +09:00
vboxsf	vboxfs: fix broken legacy mount signature checking	2021-09-27 11:26:21 -07:00
verity	fs-verity: fix signed integer overflow with i_size near S64_MAX	2021-09-22 10:56:34 -07:00
xfs	xfs: remove all COW fork extents when remounting readonly	2021-12-07 10:17:29 -08:00
zonefs	zonefs: add MODULE_ALIAS_FS	2021-12-17 16:56:35 +09:00
aio.c	aio: Fix incorrect usage of eventfd_signal_allowed()	2021-12-09 10:52:55 -08:00
anon_inodes.c	fs: add anon_inode_getfile_secure() similar to anon_inode_getfd_secure()	2021-09-19 22:35:37 -04:00
attr.c	fs: handle circular mappings correctly	2021-11-17 09:26:09 +01:00
bad_inode.c	vfs: add rcu argument to ->get_acl() callback	2021-08-18 22:08:24 +02:00
binfmt_aout.c	binfmt: a.out: Fix bogus semicolon	2021-09-05 10:15:05 -07:00
binfmt_elf_fdpic.c	coredump: Limit coredumps to a single thread group	2021-10-08 12:06:02 -05:00
binfmt_elf.c	Merge branch 'akpm' (patches from Andrew)	2021-11-09 10:11:53 -08:00
binfmt_flat.c	binfmt: remove in-tree usage of MAP_EXECUTABLE	2021-06-29 10:53:50 -07:00
binfmt_misc.c
binfmt_script.c
buffer.c	fs: simplify init_page_buffers	2021-10-18 14:43:22 -06:00
char_dev.c
compat_binfmt_elf.c
coredump.c	coredump: Limit coredumps to a single thread group	2021-10-08 12:06:02 -05:00
d_path.c	d_path: fix Kernel doc validator complaining	2021-11-06 13:30:32 -07:00
dax.c	New code for 5.15:	2021-08-31 11:13:35 -07:00
dcache.c	useful constants: struct qstr for ".."	2021-04-15 22:36:45 -04:00
direct-io.c	fs: get rid of the res2 iocb->ki_complete argument	2021-10-25 10:36:24 -06:00
drop_caches.c	fs: drop_caches: fix skipping over shadow cache inodes	2021-09-03 09:58:10 -07:00
eventfd.c	eventfd: Export eventfd_wake_count to modules	2021-09-06 07:20:56 -04:00
eventpoll.c	ARM development updates for 5.15:	2021-09-09 13:25:49 -07:00
exec.c	Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2021-11-10 16:15:54 -08:00
fcntl.c	Merge branch 'akpm' (patches from Andrew)	2021-09-03 10:08:28 -07:00
fhandle.c	switch file_open_root() to struct path	2021-04-07 13:56:43 -04:00
file_table.c
file.c	fget: clarify and improve __fget_files() implementation	2021-12-13 10:55:30 -08:00
filesystems.c	fs: simplify get_filesystem_list / get_all_fs_names	2021-08-23 01:25:40 -04:00
fs_context.c	memcg: charge fs_context and legacy_fs_context	2021-09-03 09:58:12 -07:00
fs_parser.c	namei: Standardize callers of filename_lookup()	2021-09-07 16:07:47 -04:00
fs_pin.c
fs_struct.c
fs_types.c
fs-writeback.c	Various hardening fixes and cleanups for 5.16-rc1	2021-11-01 17:29:10 -07:00
fsopen.c
init.c
inode.c	fs: Remove FS_THP_SUPPORT	2021-11-17 10:36:35 -05:00
internal.h	Merge branch 'akpm' (patches from Andrew)	2021-11-09 10:11:53 -08:00
io_uring.c	io_uring: zero iocb->ki_pos for stream file types	2021-12-22 20:34:32 -07:00
io-wq.c	io-wq: drop wqe lock before creating new worker	2021-12-13 09:04:01 -07:00
io-wq.h	io_uring: optimise INIT_WQ_LIST	2021-10-19 05:49:54 -06:00
ioctl.c	New code for 5.15:	2021-08-31 11:06:32 -07:00
Kconfig	4 cifs/smb3 fixes, one for DFS reconnect, and one to begin creating common headers for server and client and the other two to rename the cifs_common directory to smbfs_common to be more consistent ie change use of the name cifs to smb which is more accurate	2021-09-12 10:10:21 -07:00
Kconfig.binfmt	binfmt: remove support for em86 (alpha only)	2021-07-25 22:33:03 -07:00
kernel_read_file.c	vfs: check fd has read access in kernel_read_file_from_fd()	2021-10-18 20:22:03 -10:00
libfs.c	libfs: Support RENAME_EXCHANGE in simple_rename()	2021-11-03 15:43:08 +01:00
locks.c	locks: remove changelog comments	2021-10-19 14:11:39 -04:00
Makefile	4 cifs/smb3 fixes, one for DFS reconnect, and one to begin creating common headers for server and client and the other two to rename the cifs_common directory to smbfs_common to be more consistent ie change use of the name cifs to smb which is more accurate	2021-09-12 10:10:21 -07:00
mbcache.c
mount.h
mpage.c
namei.c	File locking changes for v5.16	2021-11-01 09:06:53 -07:00
namespace.c	fs/mount_setattr: always cleanup mount_kattr	2021-12-30 15:12:13 -08:00
no-block.c
nsfs.c
open.c	Merge branch 'akpm' (patches from Andrew)	2021-11-06 14:08:17 -07:00
pipe.c	Revert "mm/gup: remove try_get_page(), call try_get_compound_head() directly"	2021-09-07 11:03:45 -07:00
pnode.c
pnode.h
posix_acl.c	fs/posix_acl.c: avoid -Wempty-body warning	2021-11-06 13:30:32 -07:00
proc_namespace.c
read_write.c	fs: remove leftover comments from mandatory locking removal	2021-10-26 12:20:50 -04:00
readdir.c	readdir: make sure to verify directory entry for legacy interfaces too	2021-04-17 11:39:49 -07:00
remap_range.c	fs: remove mandatory file locking support	2021-08-23 06:15:36 -04:00
select.c	Revert "memcg: enable accounting for pollfd and select bits arrays"	2021-09-07 11:26:23 -07:00
seq_file.c	seq_file: move seq_escape() to a header	2021-11-09 10:02:52 -08:00
signalfd.c	signalfd: use wake_up_pollfree()	2021-12-09 10:49:56 -08:00
splice.c
stack.c
stat.c	fs: add generic helper for filling statx attribute flags	2021-08-17 11:47:43 +02:00
statfs.c
super.c	fs: explicitly unregister per-superblock BDIs	2021-11-06 13:30:34 -07:00
sync.c	block: simplify the block device syncing code	2021-10-22 08:36:55 -06:00
timerfd.c	timerfd: Provide timerfd_resume()	2021-08-10 17:57:22 +02:00
userfaultfd.c	userfaultfd: fix a race between writeprotect and exit_mmap()	2021-10-18 20:22:02 -10:00
utimes.c
xattr.c	xattr: fix kernel-doc for mnt_userns and vfs xattr helpers	2021-03-23 11:20:26 +01:00