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[1/2] btrfs: add error message for metadata level mismatch

Message ID 0d9b80c4616b78c7d5129b1ae92d9b45c2d8cab4.1672190127.git.wqu@suse.com (mailing list archive)
State New, archived
Headers show
Series btrfs: fixes for commit 947a629988f1 ("btrfs: move tree block parentness check into validate_extent_buffer()") | expand

Commit Message

Qu Wenruo Dec. 28, 2022, 11:32 p.m. UTC 
From a recent regression report, we found that after commit 947a629988f1
("btrfs: move tree block parentness check into
validate_extent_buffer()") if we have a level mismatch (false alert
though), there is no error message at all.

This makes later debug much harder.

This patch will add the proper error message for such case.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/disk-io.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index f8b5955f003f..ec48adba2ae9 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -530,6 +530,10 @@  static int validate_extent_buffer(struct extent_buffer *eb,
 	}
 
 	if (found_level != check->level) {
+		btrfs_err(fs_info,
+	"level verify failed on logical %llu mirror %u wanted %u found %u",
+			  eb->start, eb->read_mirror, check->level,
+			  found_level);
 		ret = -EIO;
 		goto out;
 	}