[PATCH v3 3/6] f2fs: compress: fix to check unreleased compressed cluster

[Chao Yu]

From: Sheng Yong <shengyong@xxxxxxxx>

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@xxxxxxxx>
Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
---
 fs/f2fs/file.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 026d05a7edd8..782ae3be48f6 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3624,6 +3624,15 @@ 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;
@@ -3633,6 +3642,9 @@ 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