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

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Date: Wed, 20 Dec 2023 21:59:31 +0800
From: Chao Yu <chao@...nel.org>
To: jaegeuk@...nel.org
Cc: linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org,
	Sheng Yong <shengyong@...o.com>,
	Chao Yu <chao@...nel.org>
Subject: [PATCH 3/6] f2fs: compress: fix to check unreleased compressed cluster

From: Sheng Yong <shengyong@...o.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@...o.com>
Signed-off-by: Chao Yu <chao@...nel.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