Commits · 173b6e383d2a204c9921ffc1eca3b87aa2106c33 · Mirrors / github.com / raspberrypi_linux

Jan 11, 2022

ext4: avoid trim error on fs with small groups · 173b6e38

Jan Kara authored Nov 12, 2021



A user reported FITRIM ioctl failing for him on ext4 on some devices
without apparent reason.  After some debugging we've found out that
these devices (being LVM volumes) report rather large discard
granularity of 42MB and the filesystem had 1k blocksize and thus group
size of 8MB. Because ext4 FITRIM implementation puts discard
granularity into minlen, ext4_trim_fs() declared the trim request as
invalid. However just silently doing nothing seems to be a more
appropriate reaction to such combination of parameters since user did
not specify anything wrong.

CC: Lukas Czerner <lczerner@redhat.com>
Fixes: 5c2ed62f ("ext4: Adjust minlen with discard_granularity in the FITRIM ioctl")
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20211112152202.26614-1-jack@suse.cz


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

173b6e38

ext4: fix an use-after-free issue about data=journal writeback mode · 5c48a7df

Zhang Yi authored Dec 25, 2021



Our syzkaller report an use-after-free issue that accessing the freed
buffer_head on the writeback page in __ext4_journalled_writepage(). The
problem is that if there was a truncate racing with the data=journalled
writeback procedure, the writeback length could become zero and
bget_one() refuse to get buffer_head's refcount, then the truncate
procedure release buffer once we drop page lock, finally, the last
ext4_walk_page_buffers() trigger the use-after-free problem.

sync                               truncate
ext4_sync_file()
 file_write_and_wait_range()
                                   ext4_setattr(0)
                                    inode->i_size = 0
  ext4_writepage()
   len = 0
   __ext4_journalled_writepage()
    page_bufs = page_buffers(page)
    ext4_walk_page_buffers(bget_one) <- does not get refcount
                                    do_invalidatepage()
                                      free_buffer_head()
    ext4_walk_page_buffers(page_bufs) <- trigger use-after-free

After commit bdf96838 ("ext4: fix race between truncate and
__ext4_journalled_writepage()"), we have already handled the racing
case, so the bget_one() and bput_one() are not needed. So this patch
simply remove these hunk, and recheck the i_size to make it safe.

Fixes: bdf96838 ("ext4: fix race between truncate and __ext4_journalled_writepage()")
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211225090937.712867-1-yi.zhang@huawei.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

5c48a7df

ext4: fix null-ptr-deref in '__ext4_journal_ensure_credits' · 298b5c52

Ye Bin authored Dec 24, 2021



We got issue as follows when run syzkaller test:
[ 1901.130043] EXT4-fs error (device vda): ext4_remount:5624: comm syz-executor.5: Abort forced by user
[ 1901.130901] Aborting journal on device vda-8.
[ 1901.131437] EXT4-fs error (device vda): ext4_journal_check_start:61: comm syz-executor.16: Detected aborted journal
[ 1901.131566] EXT4-fs error (device vda): ext4_journal_check_start:61: comm syz-executor.11: Detected aborted journal
[ 1901.132586] EXT4-fs error (device vda): ext4_journal_check_start:61: comm syz-executor.18: Detected aborted journal
[ 1901.132751] EXT4-fs error (device vda): ext4_journal_check_start:61: comm syz-executor.9: Detected aborted journal
[ 1901.136149] EXT4-fs error (device vda) in ext4_reserve_inode_write:6035: Journal has aborted
[ 1901.136837] EXT4-fs error (device vda): ext4_journal_check_start:61: comm syz-fuzzer: Detected aborted journal
[ 1901.136915] ==================================================================
[ 1901.138175] BUG: KASAN: null-ptr-deref in __ext4_journal_ensure_credits+0x74/0x140 [ext4]
[ 1901.138343] EXT4-fs error (device vda): ext4_journal_check_start:61: comm syz-executor.13: Detected aborted journal
[ 1901.138398] EXT4-fs error (device vda): ext4_journal_check_start:61: comm syz-executor.1: Detected aborted journal
[ 1901.138808] Read of size 8 at addr 0000000000000000 by task syz-executor.17/968
[ 1901.138817]
[ 1901.138852] EXT4-fs error (device vda): ext4_journal_check_start:61: comm syz-executor.30: Detected aborted journal
[ 1901.144779] CPU: 1 PID: 968 Comm: syz-executor.17 Not tainted 4.19.90-vhulk2111.1.0.h893.eulerosv2r10.aarch64+ #1
[ 1901.146479] Hardware name: linux,dummy-virt (DT)
[ 1901.147317] Call trace:
[ 1901.147552]  dump_backtrace+0x0/0x2d8
[ 1901.147898]  show_stack+0x28/0x38
[ 1901.148215]  dump_stack+0xec/0x15c
[ 1901.148746]  kasan_report+0x108/0x338
[ 1901.149207]  __asan_load8+0x58/0xb0
[ 1901.149753]  __ext4_journal_ensure_credits+0x74/0x140 [ext4]
[ 1901.150579]  ext4_xattr_delete_inode+0xe4/0x700 [ext4]
[ 1901.151316]  ext4_evict_inode+0x524/0xba8 [ext4]
[ 1901.151985]  evict+0x1a4/0x378
[ 1901.152353]  iput+0x310/0x428
[ 1901.152733]  do_unlinkat+0x260/0x428
[ 1901.153056]  __arm64_sys_unlinkat+0x6c/0xc0
[ 1901.153455]  el0_svc_common+0xc8/0x320
[ 1901.153799]  el0_svc_handler+0xf8/0x160
[ 1901.154265]  el0_svc+0x10/0x218
[ 1901.154682] ==================================================================

This issue may happens like this:
	Process1                               Process2
ext4_evict_inode
  ext4_journal_start
   ext4_truncate
     ext4_ind_truncate
       ext4_free_branches
         ext4_ind_truncate_ensure_credits
	   ext4_journal_ensure_credits_fn
	     ext4_journal_restart
	       handle->h_transaction = NULL;
                                           mount -o remount,abort  /mnt
					   -> trigger JBD abort
               start_this_handle -> will return failed
  ext4_xattr_delete_inode
    ext4_journal_ensure_credits
      ext4_journal_ensure_credits_fn
        __ext4_journal_ensure_credits
	  jbd2_handle_buffer_credits
	    journal = handle->h_transaction->t_journal; ->null-ptr-deref

Now, indirect truncate process didn't handle error. To solve this issue
maybe simply add check handle is abort in '__ext4_journal_ensure_credits'
is enough, and i also think this is necessary.

Cc: stable@kernel.org
Signed-off-by: Ye Bin <yebin10@huawei.com>
Link: https://lore.kernel.org/r/20211224100341.3299128-1-yebin10@huawei.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

298b5c52

ext4: initialize err_blk before calling __ext4_get_inode_loc · c27c29c6

Harshad Shirwadkar authored Dec 01, 2021



It is not guaranteed that __ext4_get_inode_loc will definitely set
err_blk pointer when it returns EIO. To avoid using uninitialized
variables, let's first set err_blk to 0.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211201163421.2631661-1-harshads@google.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

c27c29c6

ext4: fix a possible ABBA deadlock due to busy PA · 8c80fb31

Chunguang Xu authored Nov 23, 2021



We found on older kernel (3.10) that in the scenario of insufficient
disk space, system may trigger an ABBA deadlock problem, it seems that
this problem still exists in latest kernel, try to fix it here. The
main process triggered by this problem is that task A occupies the PA
and waits for the jbd2 transaction finish, the jbd2 transaction waits
for the completion of task B's IO (plug_list), but task B waits for
the release of PA by task A to finish discard, which indirectly forms
an ABBA deadlock. The related calltrace is as follows:

    Task A
    vfs_write
    ext4_mb_new_blocks()
    ext4_mb_mark_diskspace_used()       JBD2
    jbd2_journal_get_write_access()  -> jbd2_journal_commit_transaction()
  ->schedule()                          filemap_fdatawait()
 |                                              |
 | Task B                                       |
 | do_unlinkat()                                |
 | ext4_evict_inode()                           |
 | jbd2_journal_begin_ordered_truncate()        |
 | filemap_fdatawrite_range()                   |
 | ext4_mb_new_blocks()                         |
  -ext4_mb_discard_group_preallocations() <-----

Here, try to cancel ext4_mb_discard_group_preallocations() internal
retry due to PA busy, and do a limited number of retries inside
ext4_mb_discard_preallocations(), which can circumvent the above
problems, but also has some advantages:

1. Since the PA is in a busy state, if other groups have free PAs,
   keeping the current PA may help to reduce fragmentation.
2. Continue to traverse forward instead of waiting for the current
   group PA to be released. In most scenarios, the PA discard time
   can be reduced.

However, in the case of smaller free space, if only a few groups have
space, then due to multiple traversals of the group, it may increase
CPU overhead. But in contrast, I feel that the overall benefit is
better than the cost.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/1637630277-23496-1-git-send-email-brookxu.cn@gmail.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

8c80fb31

ext4: replace snprintf in show functions with sysfs_emit · dfac1a16

Qing Wang authored Oct 12, 2021



coccicheck complains about the use of snprintf() in sysfs show functions.

Fix the coccicheck warning:
WARNING: use scnprintf or sprintf.

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Signed-off-by: Qing Wang <wangqing@vivo.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/1634095731-4528-1-git-send-email-wangqing@vivo.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

dfac1a16

ext4: make sure to reset inode lockdep class when quota enabling fails · 4013d47a

Jan Kara authored Oct 07, 2021



When we succeed in enabling some quota type but fail to enable another
one with quota feature, we correctly disable all enabled quota types.
However we forget to reset i_data_sem lockdep class. When the inode gets
freed and reused, it will inherit this lockdep class (i_data_sem is
initialized only when a slab is created) and thus eventually lockdep
barfs about possible deadlocks.

Reported-and-tested-by:  <syzbot+3b6f9218b1301ddda3e2@syzkaller.appspotmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20211007155336.12493-3-jack@suse.cz


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

4013d47a

ext4: make sure quota gets properly shutdown on error · 15fc69bb

Jan Kara authored Oct 07, 2021



When we hit an error when enabling quotas and setting inode flags, we do
not properly shutdown quota subsystem despite returning error from
Q_QUOTAON quotactl. This can lead to some odd situations like kernel
using quota file while it is still writeable for userspace. Make sure we
properly cleanup the quota subsystem in case of error.

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20211007155336.12493-2-jack@suse.cz


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

15fc69bb

ext4: Fix BUG_ON in ext4_bread when write quota data · 380a0091

Ye Bin authored Dec 23, 2021



We got issue as follows when run syzkaller:
[  167.936972] EXT4-fs error (device loop0): __ext4_remount:6314: comm rep: Abort forced by user
[  167.938306] EXT4-fs (loop0): Remounting filesystem read-only
[  167.981637] Assertion failure in ext4_getblk() at fs/ext4/inode.c:847: '(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_FC_REPLAY) || handle != NULL || create == 0'
[  167.983601] ------------[ cut here ]------------
[  167.984245] kernel BUG at fs/ext4/inode.c:847!
[  167.984882] invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
[  167.985624] CPU: 7 PID: 2290 Comm: rep Tainted: G    B             5.16.0-rc5-next-20211217+ #123
[  167.986823] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014
[  167.988590] RIP: 0010:ext4_getblk+0x17e/0x504
[  167.989189] Code: c6 01 74 28 49 c7 c0 a0 a3 5c 9b b9 4f 03 00 00 48 c7 c2 80 9c 5c 9b 48 c7 c6 40 b6 5c 9b 48 c7 c7 20 a4 5c 9b e8 77 e3 fd ff <0f> 0b 8b 04 244
[  167.991679] RSP: 0018:ffff8881736f7398 EFLAGS: 00010282
[  167.992385] RAX: 0000000000000094 RBX: 1ffff1102e6dee75 RCX: 0000000000000000
[  167.993337] RDX: 0000000000000001 RSI: ffffffff9b6e29e0 RDI: ffffed102e6dee66
[  167.994292] RBP: ffff88816a076210 R08: 0000000000000094 R09: ffffed107363fa09
[  167.995252] R10: ffff88839b1fd047 R11: ffffed107363fa08 R12: ffff88816a0761e8
[  167.996205] R13: 0000000000000000 R14: 0000000000000021 R15: 0000000000000001
[  167.997158] FS:  00007f6a1428c740(0000) GS:ffff88839b000000(0000) knlGS:0000000000000000
[  167.998238] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  167.999025] CR2: 00007f6a140716c8 CR3: 0000000133216000 CR4: 00000000000006e0
[  167.999987] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  168.000944] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  168.001899] Call Trace:
[  168.002235]  <TASK>
[  168.007167]  ext4_bread+0xd/0x53
[  168.007612]  ext4_quota_write+0x20c/0x5c0
[  168.010457]  write_blk+0x100/0x220
[  168.010944]  remove_free_dqentry+0x1c6/0x440
[  168.011525]  free_dqentry.isra.0+0x565/0x830
[  168.012133]  remove_tree+0x318/0x6d0
[  168.014744]  remove_tree+0x1eb/0x6d0
[  168.017346]  remove_tree+0x1eb/0x6d0
[  168.019969]  remove_tree+0x1eb/0x6d0
[  168.022128]  qtree_release_dquot+0x291/0x340
[  168.023297]  v2_release_dquot+0xce/0x120
[  168.023847]  dquot_release+0x197/0x3e0
[  168.024358]  ext4_release_dquot+0x22a/0x2d0
[  168.024932]  dqput.part.0+0x1c9/0x900
[  168.025430]  __dquot_drop+0x120/0x190
[  168.025942]  ext4_clear_inode+0x86/0x220
[  168.026472]  ext4_evict_inode+0x9e8/0xa22
[  168.028200]  evict+0x29e/0x4f0
[  168.028625]  dispose_list+0x102/0x1f0
[  168.029148]  evict_inodes+0x2c1/0x3e0
[  168.030188]  generic_shutdown_super+0xa4/0x3b0
[  168.030817]  kill_block_super+0x95/0xd0
[  168.031360]  deactivate_locked_super+0x85/0xd0
[  168.031977]  cleanup_mnt+0x2bc/0x480
[  168.033062]  task_work_run+0xd1/0x170
[  168.033565]  do_exit+0xa4f/0x2b50
[  168.037155]  do_group_exit+0xef/0x2d0
[  168.037666]  __x64_sys_exit_group+0x3a/0x50
[  168.038237]  do_syscall_64+0x3b/0x90
[  168.038751]  entry_SYSCALL_64_after_hwframe+0x44/0xae

In order to reproduce this problem, the following conditions need to be met:
1. Ext4 filesystem with no journal;
2. Filesystem image with incorrect quota data;
3. Abort filesystem forced by user;
4. umount filesystem;

As in ext4_quota_write:
...
         if (EXT4_SB(sb)->s_journal && !handle) {
                 ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)"
                         " cancelled because transaction is not started",
                         (unsigned long long)off, (unsigned long long)len);
                 return -EIO;
         }
...
We only check handle if NULL when filesystem has journal. There is need
check handle if NULL even when filesystem has no journal.

Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20211223015506.297766-1-yebin10@huawei.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

380a0091

ext4: destroy ext4_fc_dentry_cachep kmemcache on module removal · ab047d51

Sebastian Andrzej Siewior authored Dec 23, 2021



The kmemcache for ext4_fc_dentry_cachep remains registered after module
removal.

Destroy ext4_fc_dentry_cachep kmemcache on module removal.

Fixes: aa75f4d3 ("ext4: main fast-commit commit path")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211110134640.lyku5vklvdndw6uk@linutronix.de
Link: https://lore.kernel.org/r/YbiK3JetFFl08bd7@linutronix.de
Link: https://lore.kernel.org/r/20211223164436.2628390-1-bigeasy@linutronix.de


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

ab047d51

ext4: fast commit may miss tracking unwritten range during ftruncate · 9725958b

Xin Yin authored Dec 23, 2021



If use FALLOC_FL_KEEP_SIZE to alloc unwritten range at bottom, the
inode->i_size will not include the unwritten range. When call
ftruncate with fast commit enabled, it will miss to track the
unwritten range.

Change to trace the full range during ftruncate.

Signed-off-by: Xin Yin <yinxin.x@bytedance.com>
Reviewed-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211223032337.5198-3-yinxin.x@bytedance.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

9725958b

ext4: use ext4_ext_remove_space() for fast commit replay delete range · 0b5b5a62

Xin Yin authored Dec 23, 2021



For now ,we use ext4_punch_hole() during fast commit replay delete range
procedure. But it will be affected by inode->i_size, which may not
correct during fast commit replay procedure. The following test will
failed.

-create & write foo (len 1000K)
-falloc FALLOC_FL_ZERO_RANGE foo (range 400K - 600K)
-create & fsync bar
-falloc FALLOC_FL_PUNCH_HOLE foo (range 300K-500K)
-fsync foo
-crash before a full commit

After the fast_commit reply procedure, the range 400K-500K will not be
removed. Because in this case, when calling ext4_punch_hole() the
inode->i_size is 0, and it just retruns with doing nothing.

Change to use ext4_ext_remove_space() instead of ext4_punch_hole()
to remove blocks of inode directly.

Signed-off-by: Xin Yin <yinxin.x@bytedance.com>
Reviewed-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211223032337.5198-2-yinxin.x@bytedance.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

0b5b5a62

ext4: fix fast commit may miss tracking range for FALLOC_FL_ZERO_RANGE · 5e4d0eba

Xin Yin authored Dec 21, 2021



when call falloc with FALLOC_FL_ZERO_RANGE, to set an range to unwritten,
which has been already initialized. If the range is align to blocksize,
fast commit will not track range for this change.

Also track range for unwritten range in ext4_map_blocks().

Signed-off-by: Xin Yin <yinxin.x@bytedance.com>
Reviewed-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211221022839.374606-1-yinxin.x@bytedance.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

5e4d0eba

Dec 24, 2021

ext4: update fast commit TODOs · d1199b94

Harshad Shirwadkar authored Dec 23, 2021



This series takes care of a couple of TODOs and adds new ones. Update
the TODOs section to reflect current state and future work that needs
to happen.

Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211223202140.2061101-5-harshads@google.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

d1199b94

ext4: simplify updating of fast commit stats · 0915e464

Harshad Shirwadkar authored Dec 23, 2021



Move fast commit stats updating logic to a separate function from
ext4_fc_commit(). This significantly improves readability of
ext4_fc_commit().

Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211223202140.2061101-4-harshads@google.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

0915e464

ext4: drop ineligible txn start stop APIs · 7bbbe241

Harshad Shirwadkar authored Dec 23, 2021



This patch drops ext4_fc_start_ineligible() and
ext4_fc_stop_ineligible() APIs. Fast commit ineligible transactions
should simply call ext4_fc_mark_ineligible() after starting the
trasaction.

Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211223202140.2061101-3-harshads@google.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

7bbbe241

ext4: use ext4_journal_start/stop for fast commit transactions · 2729cfdc

Harshad Shirwadkar authored Dec 23, 2021

This patch drops all calls to ext4_fc_start_update() and
ext4_fc_stop_update(). To ensure that there are no ongoing journal
updates during fast commit, we also make jbd2_fc_begin_commit() lock
journal for updates. This way we don't have to maintain two different
transaction start stop APIs for fast commit and full commit. This
patch doesn't remove the functions altogether since in future we want
to have inode level locking for fast commits.

Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211223202140.2061101-2-harshads@google.com

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

2729cfdc

Dec 23, 2021

ext4: fix i_version handling on remount · 960e0ab6

Lukas Czerner authored Dec 22, 2021



i_version mount option is getting lost on remount. This is because the
'i_version' mount option differs from the util-linux mount option
'iversion', but it has exactly the same functionality. We have to
specifically notify the vfs that this is what we want by setting
appropriate flag in fc->sb_flags. Fix it and as a result we can remove
*flags argument from __ext4_remount(); do the same for
__ext4_fill_super().

In addition set out to deprecate ext4 specific 'i_version' mount option
in favor or 'iversion' by kernel version 5.20.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Fixes: cebe85d5 ("ext4: switch to the new mount api")
Link: https://lore.kernel.org/r/20211222104517.11187-2-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

960e0ab6

ext4: remove lazytime/nolazytime mount options handled by MS_LAZYTIME · 4437992b

Lukas Czerner authored Dec 22, 2021

The lazytime and nolazytime mount options were added temporarily back in
2015 with commit a26f4992 ("ext4: add optimization for the lazytime
mount option"). It think it has been enough time for the util-linux with
lazytime support to get widely used. Remove the mount options.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Link: https://lore.kernel.org/r/20211222104517.11187-1-lczerner@redhat.com

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

4437992b

ext4: don't fail remount if journalling mode didn't change · 4c246728

Lukas Czerner authored Dec 20, 2021



Switching to the new mount api introduced inconsistency in how the
journalling mode mount option (data=) is handled during a remount.

Ext4 always prevented changing the journalling mode during the remount,
however the new code always fails the remount when the journalling mode
is specified, even if it remains unchanged. Fix it.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reported-by: Heiner Kallweit <hkallweit1@gmail.com>
Fixes: cebe85d5 ("ext4: switch to the new mount api")
Link: https://lore.kernel.org/r/20211220152657.101599-1-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

4c246728

Dec 10, 2021

ext4: Remove unused match_table_t tokens · ba2e524d

Lukas Czerner authored Oct 27, 2021



Remove unused match_table_t, slim down mount_opts structure by removing
unnecessary definitions, remove redundant MOPT_ flags and clean up
ext4_parse_param() by converting the most of the if/else branching to
switch except for the MOPT_SET/MOPT_CEAR handling.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-14-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

ba2e524d

ext4: switch to the new mount api · cebe85d5

Lukas Czerner authored Oct 27, 2021

Add the necessary functions for the fs_context_operations. Convert and
rename ext4_remount() and ext4_fill_super() to ext4_get_tree() and
ext4_reconfigure() respectively and switch the ext4 to use the new api.

One user facing change is the fact that we no longer have access to the
entire string of mount options provided by mount(2) since the mount api
does not store it anywhere. As a result we can't print the options to
the log as we did in the past after the successful mount.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-13-lczerner@redhat.com

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

cebe85d5

ext4: change token2str() to use ext4_param_specs · 97d8a670

Lukas Czerner authored Oct 27, 2021



Change token2str() to use ext4_param_specs instead of tokens so that we
can get rid of tokens entirely.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-12-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

97d8a670

ext4: clean up return values in handle_mount_opt() · 02f960f8

Lukas Czerner authored Oct 27, 2021



Clean up return values in handle_mount_opt() and rename the function to
ext4_parse_param()

Now we can use it in fs_context_operations as .parse_param.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-11-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

02f960f8

ext4: Completely separate options parsing and sb setup · 7edfd85b

Lukas Czerner authored Oct 27, 2021



The new mount api separates option parsing and super block setup into
two distinct steps and so we need to separate the options parsing out of
the ext4_fill_super() and ext4_remount().

In order to achieve this we have to create new ext4_fill_super() and
ext4_remount() functions which will serve its purpose only until we
actually do convert to the new api (as such they are only temporary for
this patch series) and move the option parsing out of the old function
which will now be renamed to __ext4_fill_super() and __ext4_remount().

There is a small complication in the fact that while the mount option
parsing is going to happen before we get to __ext4_fill_super(), the
mount options stored in the super block itself needs to be applied
first, before the user specified mount options.

So with this patch we're going through the following sequence:

- parse user provided options (including sb block)
- initialize sbi and store s_sb_block if provided
- in __ext4_fill_super()
	- read the super block
	- parse and apply options specified in s_mount_opts
	- check and apply user provided options stored in ctx
	- continue with the regular ext4_fill_super operation

It's not exactly the most elegant solution, but if we still want to
support s_mount_opts we have to do it in this order.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-10-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

7edfd85b

ext4: get rid of super block and sbi from handle_mount_ops() · 6e47a3cc

Lukas Czerner authored Oct 27, 2021



At the parsing phase of mount in the new mount api sb will not be
available. We've already removed some uses of sb and sbi, but now we
need to get rid of the rest of it.

Use ext4_fs_context to store all of the configuration specification so
that it can be later applied to the super block and sbi.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-9-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

6e47a3cc

ext4: check ext2/3 compatibility outside handle_mount_opt() · b6bd2435

Lukas Czerner authored Oct 27, 2021



At the parsing phase of mount in the new mount api sb will not be
available so move ext2/3 compatibility check outside handle_mount_opt().
Unfortunately we will lose the ability to show exactly which option is
not compatible.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-8-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

b6bd2435

ext4: move quota configuration out of handle_mount_opt() · e6e268cb

Lukas Czerner authored Oct 27, 2021



At the parsing phase of mount in the new mount api sb will not be
available so move quota confiquration out of handle_mount_opt() by
noting the quota file names in the ext4_fs_context structure to be
able to apply it later.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-7-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

e6e268cb

ext4: Allow sb to be NULL in ext4_msg() · da812f61

Lukas Czerner authored Oct 27, 2021



At the parsing phase of mount in the new mount api sb will not be
available so allow sb to be NULL in ext4_msg and use that in
handle_mount_opt().

Also change return value to appropriate -EINVAL where needed.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-6-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

da812f61

ext4: Change handle_mount_opt() to use fs_parameter · 461c3af0

Lukas Czerner authored Oct 27, 2021



Use the new mount option specifications to parse the options in
handle_mount_opt(). However we're still using the old API to get the
options string.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-5-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

461c3af0

ext4: move option validation to a separate function · 4c94bff9

Lukas Czerner authored Oct 27, 2021



Move option validation out of parse_options() into a separate function
ext4_validate_options().

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-4-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

4c94bff9

ext4: Add fs parameter specifications for mount options · e5a185c2

Lukas Czerner authored Oct 27, 2021



Create an array of fs_parameter_spec called ext4_param_specs to
hold the mount option specifications we're going to be using with the
new mount api.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-3-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

e5a185c2

fs_parse: allow parameter value to be empty · 6abfaaf1

Lukas Czerner authored Oct 27, 2021



Allow parameter value to be empty by specifying fs_param_can_be_empty
flag.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Link: https://lore.kernel.org/r/20211027141857.33657-2-lczerner@redhat.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>

6abfaaf1

Dec 06, 2021

Linux 5.16-rc4 · 0fcfb00b
Linus Torvalds authored Dec 05, 2021

0fcfb00b

Merge tag 'for-5.16/parisc-6' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · 268ba095

Linus Torvalds authored Dec 05, 2021

Pull parisc fixes from Helge Deller:
 "Some bug and warning fixes:

   - Fix "make install" to use debians "installkernel" script which is
     now in /usr/sbin

   - Fix the bindeb-pkg make target by giving the correct KBUILD_IMAGE
     file name

   - Fix compiler warnings by annotating parisc agp init functions with
     __init

   - Fix timekeeping on SMP machines with dual-core CPUs

   - Enable some more config options in the 64-bit defconfig"

* tag 'for-5.16/parisc-6' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Mark cr16 CPU clocksource unstable on all SMP machines
  parisc: Fix "make install" on newer debian releases
  parisc/agp: Annotate parisc agp init functions with __init
  parisc: Enable sata sil, audit and usb support on 64-bit defconfig
  parisc: Fix KBUILD_IMAGE for self-extracting kernel

268ba095

Merge tag 'usb-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 94420704

Linus Torvalds authored Dec 05, 2021

Pull USB fixes from Greg KH:
 "Here are some small USB fixes for a few reported issues. Included in
  here are:

   - xhci fix for a _much_ reported regression. I don't think there's a
     community distro that has not reported this problem yet :(

   - new USB quirk addition

   - cdns3 minor fixes

   - typec regression fix.

  All of these have been in linux-next with no reported problems, and
  the xhci fix has been reported by many to resolve their reported
  problem"

* tag 'usb-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: cdnsp: Fix a NULL pointer dereference in cdnsp_endpoint_init()
  usb: cdns3: gadget: fix new urb never complete if ep cancel previous requests
  usb: typec: tcpm: Wait in SNK_DEBOUNCED until disconnect
  USB: NO_LPM quirk Lenovo Powered USB-C Travel Hub
  xhci: Fix commad ring abort, write all 64 bits to CRCR register.

94420704

Merge tag 'tty-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 51639539

Linus Torvalds authored Dec 05, 2021

Pull tty/serial fixes from Greg KH:
 "Here are some small TTY and Serial driver fixes for 5.16-rc4 to
  resolve a number of reported problems.

  They include:

   - liteuart serial driver fixes

   - 8250_pci serial driver fixes for pericom devices

   - 8250 RTS line control fix while in RS-485 mode

   - tegra serial driver fix

   - msm_serial driver fix

   - pl011 serial driver new id

   - fsl_lpuart revert of broken change

   - 8250_bcm7271 serial driver fix

   - MAINTAINERS file update for rpmsg tty driver that came in 5.16-rc1

   - vgacon fix for reported problem

  All of these, except for the 8250_bcm7271 fix have been in linux-next
  with no reported problem. The 8250_bcm7271 fix was added to the tree
  on Friday so no chance to be linux-next yet. But it should be fine as
  the affected developers submitted it"

* tag 'tty-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: 8250_bcm7271: UART errors after resuming from S2
  serial: 8250_pci: rewrite pericom_do_set_divisor()
  serial: 8250_pci: Fix ACCES entries in pci_serial_quirks array
  serial: 8250: Fix RTS modem control while in rs485 mode
  Revert "tty: serial: fsl_lpuart: drop earlycon entry for i.MX8QXP"
  serial: tegra: Change lower tolerance baud rate limit for tegra20 and tegra30
  serial: liteuart: relax compile-test dependencies
  serial: liteuart: fix minor-number leak on probe errors
  serial: liteuart: fix use-after-free and memleak on unbind
  serial: liteuart: Fix NULL pointer dereference in ->remove()
  vgacon: Propagate console boot parameters before calling `vc_resize'
  tty: serial: msm_serial: Deactivate RX DMA for polling support
  serial: pl011: Add ACPI SBSA UART match id
  serial: core: fix transmit-buffer reset and memleak
  MAINTAINERS: Add rpmsg tty driver maintainer

51639539

Merge tag 'timers_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 7587a4a5

Linus Torvalds authored Dec 05, 2021

Pull timer fix from Borislav Petkov:

 - Prevent a tick storm when a dedicated timekeeper CPU in nohz_full
   mode runs for prolonged periods with interrupts disabled and ends up
   programming the next tick in the past, leading to that storm

* tag 'timers_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timers/nohz: Last resort update jiffies on nohz_full IRQ entry

7587a4a5

Merge tag 'sched_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 1d213767

Linus Torvalds authored Dec 05, 2021

Pull scheduler fixes from Borislav Petkov:

 - Properly init uclamp_flags of a runqueue, on first enqueuing

 - Fix preempt= callback return values

 - Correct utime/stime resource usage reporting on nohz_full to return
   the proper times instead of shorter ones

* tag 'sched_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/uclamp: Fix rq->uclamp_max not set on first enqueue
  preempt/dynamic: Fix setup_preempt_mode() return value
  sched/cputime: Fix getrusage(RUSAGE_THREAD) with nohz_full

1d213767

Merge tag 'x86_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f5d54a42

Linus Torvalds authored Dec 05, 2021

Pull x86 fixes from Borislav Petkov:

 - Fix a couple of SWAPGS fencing issues in the x86 entry code

 - Use the proper operand types in __{get,put}_user() to prevent
   truncation in SEV-ES string io

 - Make sure the kernel mappings are present in trampoline_pgd in order
   to prevent any potential accesses to unmapped memory after switching
   to it

 - Fix a trivial list corruption in objtool's pv_ops validation

 - Disable the clocksource watchdog for TSC on platforms which claim
   that the TSC is constant, doesn't stop in sleep states, CPU has TSC
   adjust and the number of sockets of the platform are max 2, to
   prevent erroneous markings of the TSC as unstable.

 - Make sure TSC adjust is always checked not only when going idle

 - Prevent a stack leak by initializing struct _fpx_sw_bytes properly in
   the FPU code

 - Fix INTEL_FAM6_RAPTORLAKE define naming to adhere to the convention

* tag 'x86_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/xen: Add xenpv_restore_regs_and_return_to_usermode()
  x86/entry: Use the correct fence macro after swapgs in kernel CR3
  x86/entry: Add a fence for kernel entry SWAPGS in paranoid_entry()
  x86/sev: Fix SEV-ES INS/OUTS instructions for word, dword, and qword
  x86/64/mm: Map all kernel memory into trampoline_pgd
  objtool: Fix pv_ops noinstr validation
  x86/tsc: Disable clocksource watchdog for TSC on qualified platorms
  x86/tsc: Add a timer to make sure TSC_adjust is always checked
  x86/fpu/signal: Initialize sw_bytes in save_xstate_epilog()
  x86/cpu: Drop spurious underscore from RAPTOR_LAKE #define

f5d54a42