[PATCH 3/6] f2fs: compress: fix to check unreleased compressed cluster

Chao Yu
2023-12-20T13:59:46Z

From: Sheng Yong <shengyong@oppo.com>

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>
---
fs/f2fs/file.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index c5e681fc1d58..c200b4c81baf 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3643,6 +3643,15 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
goto next;
}

+ /*
+ * compressed cluster was not released due to
+ * it fails in release_compress_blocks().
+ */
+ if (blkaddr == NEW_ADDR) {
+ compr_blocks++;
+ continue;
+ }
+
if (__is_valid_data_blkaddr(blkaddr)) {
compr_blocks++;
continue;
@@ -3652,6 +3661,9 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
}

reserved = cluster_size - compr_blocks;
+ if (!reserved)
+ goto next;
+
ret = inc_valid_block_count(sbi, dn->inode, &reserved);
if (ret)
return ret;
--
2.40.1