f2fs: improve print log in f2fs_sanity_check_ckpt()

As Park Ju Hyung suggested:

"I'd like to suggest to write down an actual version of f2fs-tools
here as we've seen older versions of fsck doing even more damage
and the users might not have the latest f2fs-tools installed."

This patch give a more detailed info of how we fix such corruption
to user to avoid damageable repair with low version fsck.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 1d33ca1a8c09..d95a681ef7c9 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -2688,7 +2688,9 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
 
         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
-                f2fs_warn(sbi, "layout of large_nat_bitmap is deprecated, run fsck to repair, chksum_offset: %u",
+                f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
+                          "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
+                          "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
                           le32_to_cpu(ckpt->checksum_offset));
                 return 1;
         }