Commit e7a4feb0 authored May 08, 2018 by Chao Yu Committed by Jaegeuk Kim May 31, 2018

f2fs: fix to let checkpoint guarantee atomic page persistence



1. thread A: commit_inmem_pages submit data into block layer, but
haven't waited it writeback.
2. thread A: commit_inmem_pages update related node.
3. thread B: do checkpoint, flush all nodes to disk.
4. SPOR

Then, atomic file becomes corrupted since nodes is flushed before data.

This patch fixes to treat atomic page as checkpoint guaranteed one,
then in checkpoint, we can make sure all atomic page can be writebacked
with metadata of atomic file.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent 1c41e680

fs/f2fs/data.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -48,6 +48,8 @@ static bool __is_cp_guaranteed(struct page *page)
		if (inode->i_ino == F2FS_META_INO(sbi) \|\|
		inode->i_ino == F2FS_NODE_INO(sbi) \|\|
		S_ISDIR(inode->i_mode) \|\|
		(S_ISREG(inode->i_mode) &&
		is_inode_flag_set(inode, FI_ATOMIC_FILE)) \|\|
		is_cold_data(page))
		return true;
		return false;

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