[PATCH 5.15 262/317] f2fs: compress: fix to check unreleased compressed cluster

Sasha Levin
2024-03-24T23:39:15Z

From: Sheng Yong <shengyong@oppo.com>

[ Upstream commit eb8fbaa53374e0a2d4381190abfe708481517bbb ]

Compressed cluster may not be released due to we can fail in
release_compress_blocks(), fix to handle reserved compressed
cluster correctly in reserve_compress_blocks().

Fixes: 4c8ff7095bef ("f2fs: support data compression")
Signed-off-by: Sheng Yong <shengyong@oppo.com>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/f2fs/file.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 489854d841e75..bab83ce4fe091 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3566,7 +3566,13 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
goto next;
}

- if (__is_valid_data_blkaddr(blkaddr)) {
+ /*
+ * compressed cluster was not released due to it
+ * fails in release_compress_blocks(), so NEW_ADDR
+ * is a possible case.
+ */
+ if (blkaddr == NEW_ADDR ||
+ __is_valid_data_blkaddr(blkaddr)) {
compr_blocks++;
continue;
}
@@ -3576,6 +3582,11 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
}

reserved = cluster_size - compr_blocks;
+
+ /* for the case all blocks in cluster were reserved */
+ if (reserved == 1)
+ goto next;
+
ret = inc_valid_block_count(sbi, dn->inode, &reserved);
if (ret)
return ret;
--
2.43.0