Commit 9f701f6c authored by Qiuyang Sun's avatar Qiuyang Sun Committed by Jaegeuk Kim
Browse files

f2fs: check total_segments from devices in raw_super 



For multi-device F2FS, we should check if the sum of total_segments from
all devices matches segment_count.

Signed-off-by: default avatarQiuyang Sun <sunqiuyang@huawei.com>
Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 46d9ce19

fs/f2fs/super.c

+15 −0
Original line number Diff line number Diff line
@@ -2604,6 +2604,21 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi, 
		return -EFSCORRUPTED;

	}



	if (RDEV(0).path[0]) {

		block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);

		int i = 1;



		while (i < MAX_DEVICES && RDEV(i).path[0]) {

			dev_seg_count += le32_to_cpu(RDEV(i).total_segments);

			i++;

		}

		if (segment_count != dev_seg_count) {

			f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",

					segment_count, dev_seg_count);

			return -EFSCORRUPTED;

		}

	}



	if (secs_per_zone > total_sections || !secs_per_zone) {

		f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",

			  secs_per_zone, total_sections);