From 9f701f6c772b15461843b92f9b41a0705e190a86 Mon Sep 17 00:00:00 2001 From: Qiuyang Sun Date: Mon, 23 Sep 2019 12:22:35 +0800 Subject: 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: Qiuyang Sun Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/super.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'fs/f2fs/super.c') diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index f3a68af3b43a..112eb86a120f 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -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); -- cgit v1.2.3