f2fs: fix to flush multiple device in checkpoint
If f2fs manages multiple devices, in checkpoint, we need to issue flush
in those devices which contain dirty data/node in their cache before
we write checkpoint region, otherwise, filesystem metadata could be
corrupted if hitting SPO after checkpoint.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 5719807..2016082 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1172,6 +1172,7 @@
struct super_block *sb = sbi->sb;
struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
u64 kbytes_written;
+ int err;
/* Flush all the NAT/SIT pages */
while (get_pages(sbi, F2FS_DIRTY_META)) {
@@ -1265,6 +1266,11 @@
if (unlikely(f2fs_cp_error(sbi)))
return -EIO;
+ /* flush all device cache */
+ err = f2fs_flush_device_cache(sbi);
+ if (err)
+ return err;
+
/* write out checkpoint buffer at block 0 */
update_meta_page(sbi, ckpt, start_blk++);