We find a checksum error and a inode corruption problem while doing
stress test, this 4 patches address to fix them. The first patch is
relate to the error simulation, and the second & third patch are
prepare to do the fix. The last patch fix these two issue.
- Checksum error
EXT4-fs error (device sda): ext4_lookup:1784: inode #131074: comm cat: iget: checksum invalid
- Inode corruption
e2fsck 1.46.0 (29-Jan-2020)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Entry 'foo' in / (2) has deleted/unused inode 17. Clear<y>? yes
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Inode bitmap differences: -17
Fix<y>? yes
Free inodes count wrong for group #0 (32750, counted=32751).
Fix<y>? yes
Free inodes count wrong (32750, counted=32751).
Fix<y>? yes
Changes since v2:
- Instead of using WARN_ON_ONCE to prevent ext4_do_update_inode()
return before filling the inode buffer, keep the error and postpone
the report after the updating in the third patch.
- Fix some language mistacks in the last patch.
Changes since v1:
- Add a patch to prevent ext4_do_update_inode() return before filling
the inode buffer.
- Do not use BH_New flag to indicate the empty buffer, postpone the
zero and uptodate logic into ext4_do_update_inode() before filling
the inode buffer.
Thanks,
Yi.
Zhang Yi (4):
ext4: move inode eio simulation behind io completeion
ext4: remove an unnecessary if statement in __ext4_get_inode_loc()
ext4: make the updating inode data procedure atomic
ext4: prevent getting empty inode buffer
fs/ext4/inode.c | 227 +++++++++++++++++++++++++++---------------------
1 file changed, 126 insertions(+), 101 deletions(-)
--
2.31.1
