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f2fs: compress: remove unneeded preallocation

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[ Upstream commit 8f1d49832636d514e949b29ce64370ebebf6d6d2 ]

We will reserve iblocks for compression saved, so during compressed
cluster overwrite, we don't need to preallocate blocks for later
write.

In addition, it adds a bug_on to detect wrong reserved iblock number
in __f2fs_cluster_blocks().

Bug fix in the original patch by Jaegeuk:
If we released compressed blocks having an immutable bit, we can see less
number of compressed block addresses. Let's fix wrong BUG_ON.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Stable-dep-of: 7c5dffb3d90c ("f2fs: compress: fix to relocate check condition in f2fs_{release,reserve}_compress_blocks()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chao Yu 2021-05-12 17:52:58 +08:00 committed by Ksawlii
parent 0696c56814
commit 35adee220b
1 changed files with 3 additions and 0 deletions
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3
fs/f2fs/compress.c
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@ -901,6 +901,9 @@ static int __f2fs_cluster_blocks(struct inode *inode,
ret++;
}
}
f2fs_bug_on(F2FS_I_SB(inode),
!compr && ret != cluster_size && !IS_IMMUTABLE(inode));
}
fail:
f2fs_put_dnode(&dn);