[PATCH] f2fs: do not submit NEW_ADDR to read node block

[PATCH] f2fs: do not submit NEW_ADDR to read node block

[Jaegeuk Kim]

After the below patch, give cp is errored, we drop dirty node pages. This
can give NEW_ADDR to read node pages. Don't do WARN_ON() which gives
generic/475 failure.

Fixes: 28607bf3aa6f ("f2fs: drop dirty node pages when cp is in error status")
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/node.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index c945a9730f3c..5840b82ce311 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1330,7 +1330,8 @@ static int read_node_page(struct page *page, int op_flags)
 	if (err)
 		return err;
 
-	if (unlikely(ni.blk_addr == NULL_ADDR) ||
+	/* NEW_ADDR can be seen, after cp_error drops some dirty node pages */
+	if (unlikely(ni.blk_addr == NULL_ADDR || ni.blk_addr == NEW_ADDR) ||
 			is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN)) {
 		ClearPageUptodate(page);
 		return -ENOENT;
-- 
2.32.0.432.gabb21c7263-goog

Re: [f2fs-dev] [PATCH] f2fs: do not submit NEW_ADDR to read node block

[Chao Yu]

On 2021/7/27 0:13, Jaegeuk Kim wrote:
> After the below patch, give cp is errored, we drop dirty node pages. This
> can give NEW_ADDR to read node pages. Don't do WARN_ON() which gives
> generic/475 failure.
> 
> Fixes: 28607bf3aa6f ("f2fs: drop dirty node pages when cp is in error status")
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,