Commit f3f338ca authored Jul 29, 2015 by Chao Yu Committed by Jaegeuk Kim Aug 05, 2015

f2fs: freeze filesystem when fail to update meta page due to IO error



In get_meta_page, we guarantee no failure for the returned page,
but sometimes, IO error from device will incur returning an
non-updated page.

Then, we still use this page as updated one, exception could happen
when using this kind of page.

So in this condition, we'd better freeze fs by making fs readonly and
and stop doing checkpoint.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent 5768dcdd

fs/f2fs/checkpoint.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -79,6 +79,14 @@ struct page get_meta_page(struct f2fs_sb_info sbi, pgoff_t index)
		f2fs_put_page(page, 1);
		goto repeat;
		}

		/*
		* if there is any IO error when accessing device, make our filesystem
		* readonly and make sure do not write checkpoint with non-uptodate
		* meta page.
		*/
		if (unlikely(!PageUptodate(page)))
		f2fs_stop_checkpoint(sbi);
		out:
		return page;
		}