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* [f2fs-dev] [PATCH 1/2] f2fs: compress: add sanity check during compressed cluster read
@ 2020-07-29 13:21 Chao Yu
  2020-07-29 13:21 ` [f2fs-dev] [PATCH 2/2] f2fs: compress: disable compression mount option if compression is off Chao Yu
  0 siblings, 1 reply; 2+ messages in thread
From: Chao Yu @ 2020-07-29 13:21 UTC (permalink / raw)
  To: jaegeuk; +Cc: linux-kernel, linux-f2fs-devel

From: Chao Yu <yuchao0@huawei.com>

In f2fs_read_multi_pages(), we don't have to check cluster's type
again, since overwrite or partial truncation need page lock in
cluster which has already been held by reader, so cluster's type
is stable, let's change check condition to sanity check.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
 fs/f2fs/data.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index bc89bc987513..c1b676be67b9 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -2170,9 +2170,7 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
 	if (ret)
 		goto out;
 
-	/* cluster was overwritten as normal cluster */
-	if (dn.data_blkaddr != COMPRESS_ADDR)
-		goto out;
+	f2fs_bug_on(sbi, dn.data_blkaddr != COMPRESS_ADDR);
 
 	for (i = 1; i < cc->cluster_size; i++) {
 		block_t blkaddr;
-- 
2.22.0



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2020-07-29 13:21 [f2fs-dev] [PATCH 1/2] f2fs: compress: add sanity check during compressed cluster read Chao Yu
2020-07-29 13:21 ` [f2fs-dev] [PATCH 2/2] f2fs: compress: disable compression mount option if compression is off Chao Yu

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