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authorJaegeuk Kim <jaegeuk.kim@samsung.com>2013-04-26 11:55:17 +0900
committerJaegeuk Kim <jaegeuk.kim@samsung.com>2013-04-29 11:19:32 +0900
commitafcb7ca01f47b0481e0b248d1542d0934fa70767 (patch)
tree2834b57b958d2b444d40aa8144ac60ee739507ac /fs/f2fs/checkpoint.c
parent55008d845d233396ed374473da4613cee691aa03 (diff)
downloadop-kernel-dev-afcb7ca01f47b0481e0b248d1542d0934fa70767.zip
op-kernel-dev-afcb7ca01f47b0481e0b248d1542d0934fa70767.tar.gz
f2fs: check truncation of mapping after lock_page
We call lock_page when we need to update a page after readpage. Between grab and lock page, the page can be truncated by other thread. So, we should check the page after lock_page whether it was truncated or not. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/checkpoint.c')
-rw-r--r--fs/f2fs/checkpoint.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 590ea50..b1de01d 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -65,6 +65,10 @@ repeat:
goto repeat;
lock_page(page);
+ if (page->mapping != mapping) {
+ f2fs_put_page(page, 1);
+ goto repeat;
+ }
out:
mark_page_accessed(page);
return page;
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