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| author | Xin Yin <yinxin.x@bytedance.com> | 2021-12-23 11:23:36 +0800 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2022-01-10 13:25:54 -0500 |
| commit | 0b5b5a62b945a141e64011b2f90ee7e46f14be98 (patch) | |
| tree | c835a07fc401c4c44530cb468f68900194914f98 /fs/ext4/fast_commit.c | |
| parent | 5e4d0eba1ccaf19f93222abdeda5a368be141785 (diff) | |
| download | linux-0b5b5a62b945a141e64011b2f90ee7e46f14be98.tar.gz linux-0b5b5a62b945a141e64011b2f90ee7e46f14be98.tar.bz2 linux-0b5b5a62b945a141e64011b2f90ee7e46f14be98.zip | |
ext4: use ext4_ext_remove_space() for fast commit replay delete range
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
Diffstat (limited to 'fs/ext4/fast_commit.c')
| -rw-r--r-- | fs/ext4/fast_commit.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/ext4/fast_commit.c b/fs/ext4/fast_commit.c index dd002facf6c9..28ddeb1d6afb 100644 --- a/fs/ext4/fast_commit.c +++ b/fs/ext4/fast_commit.c @@ -1770,11 +1770,14 @@ ext4_fc_replay_del_range(struct super_block *sb, struct ext4_fc_tl *tl, } } - ret = ext4_punch_hole(inode, - le32_to_cpu(lrange.fc_lblk) << sb->s_blocksize_bits, - le32_to_cpu(lrange.fc_len) << sb->s_blocksize_bits); - if (ret) - jbd_debug(1, "ext4_punch_hole returned %d", ret); + down_write(&EXT4_I(inode)->i_data_sem); + ret = ext4_ext_remove_space(inode, lrange.fc_lblk, + lrange.fc_lblk + lrange.fc_len - 1); + up_write(&EXT4_I(inode)->i_data_sem); + if (ret) { + iput(inode); + return 0; + } ext4_ext_replay_shrink_inode(inode, i_size_read(inode) >> sb->s_blocksize_bits); ext4_mark_inode_dirty(NULL, inode); |