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| author | zhanchengbin <zhanchengbin1@huawei.com> | 2023-01-03 10:28:12 +0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2023-02-18 23:58:28 -0500 |
| commit | 3f5424790d4377839093b68c12b130077a4e4510 (patch) | |
| tree | 9052cdfd321d4cee3c6dcafb7c9b6de062dae338 /fs/ext4/extents.c | |
| parent | f31173c19901a96bb2ebf6bcfec8a08df7095c91 (diff) | |
| download | linux-3f5424790d4377839093b68c12b130077a4e4510.tar.gz | |
ext4: fix inode tree inconsistency caused by ENOMEM
If ENOMEM fails when the extent is splitting, we need to restore the length
of the split extent.
In the ext4_split_extent_at function, only in ext4_ext_create_new_leaf will
it alloc memory and change the shape of the extent tree,even if an ENOMEM
is returned at this time, the extent tree is still self-consistent, Just
restore the split extent lens in the function ext4_split_extent_at.
ext4_split_extent_at
ext4_ext_insert_extent
ext4_ext_create_new_leaf
1)ext4_ext_split
ext4_find_extent
2)ext4_ext_grow_indepth
ext4_find_extent
Signed-off-by: zhanchengbin <zhanchengbin1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230103022812.130603-1-zhanchengbin1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/extents.c')
| -rw-r--r-- | fs/ext4/extents.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 9de1c9d1a13d3..3559ea6b07818 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3251,7 +3251,7 @@ static int ext4_split_extent_at(handle_t *handle, ext4_ext_mark_unwritten(ex2); err = ext4_ext_insert_extent(handle, inode, ppath, &newex, flags); - if (err != -ENOSPC && err != -EDQUOT) + if (err != -ENOSPC && err != -EDQUOT && err != -ENOMEM) goto out; if (EXT4_EXT_MAY_ZEROOUT & split_flag) { |