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btrfs: output mirror number for bad metadata

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When handling a real world transid mismatch image, it's hard to know
which copy is corrupted, as the error messages just look like this:

  BTRFS warning (device dm-3): checksum verify failed on 30408704 wanted 0xcdcdcdcd found 0x3c0adc8e level 0
  BTRFS warning (device dm-3): checksum verify failed on 30408704 wanted 0xcdcdcdcd found 0x3c0adc8e level 0
  BTRFS warning (device dm-3): checksum verify failed on 30408704 wanted 0xcdcdcdcd found 0x3c0adc8e level 0
  BTRFS warning (device dm-3): checksum verify failed on 30408704 wanted 0xcdcdcdcd found 0x3c0adc8e level 0

We don't even know if the retry is caused by btrfs or the VFS retry.

To make things a little easier to read, add mirror number for all
related tree block read errors.

So the above messages would look like this:

  BTRFS warning (device dm-3): checksum verify failed on logical 30408704 mirror 1 wanted 0xcdcdcdcd found 0x3c0adc8e level 0
  BTRFS warning (device dm-3): checksum verify failed on logical 30408704 mirror 2 wanted 0xcdcdcdcd found 0x3c0adc8e level 0
  BTRFS warning (device dm-3): checksum verify failed on logical 30408704 mirror 1 wanted 0xcdcdcdcd found 0x3c0adc8e level 0
  BTRFS warning (device dm-3): checksum verify failed on logical 30408704 mirror 2 wanted 0xcdcdcdcd found 0x3c0adc8e level 0

Signed-off-by: Qu Wenruo <wqu@suse.com>
[ update messages, add "logical" ]
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2022-06-19 21:47:56 +08:00 committed by David Sterba
parent aaafa1ebd6
commit 8f0ed7d4e7
1 changed files with 14 additions and 12 deletions
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26
fs/btrfs/disk-io.c
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@ -221,8 +221,8 @@ static int verify_parent_transid(struct extent_io_tree *io_tree,
goto out;
}
btrfs_err_rl(eb->fs_info,
"parent transid verify failed on %llu wanted %llu found %llu",
eb->start,
"parent transid verify failed on logical %llu mirror %u wanted %llu found %llu",
eb->start, eb->read_mirror,
parent_transid, btrfs_header_generation(eb));
ret = 1;
clear_extent_buffer_uptodate(eb);
@ -552,21 +552,23 @@ static int validate_extent_buffer(struct extent_buffer *eb)
found_start = btrfs_header_bytenr(eb);
if (found_start != eb->start) {
btrfs_err_rl(fs_info, "bad tree block start, want %llu have %llu",
eb->start, found_start);
btrfs_err_rl(fs_info,
"bad tree block start, mirror %u want %llu have %llu",
eb->read_mirror, eb->start, found_start);
ret = -EIO;
goto out;
}
if (check_tree_block_fsid(eb)) {
btrfs_err_rl(fs_info, "bad fsid on block %llu",
eb->start);
btrfs_err_rl(fs_info, "bad fsid on logical %llu mirror %u",
eb->start, eb->read_mirror);
ret = -EIO;
goto out;
}
found_level = btrfs_header_level(eb);
if (found_level >= BTRFS_MAX_LEVEL) {
btrfs_err(fs_info, "bad tree block level %d on %llu",
(int)btrfs_header_level(eb), eb->start);
btrfs_err(fs_info,
"bad tree block level, mirror %u level %d on logical %llu",
eb->read_mirror, btrfs_header_level(eb), eb->start);
ret = -EIO;
goto out;
}
@ -577,8 +579,8 @@ static int validate_extent_buffer(struct extent_buffer *eb)
if (memcmp(result, header_csum, csum_size) != 0) {
btrfs_warn_rl(fs_info,
"checksum verify failed on %llu wanted " CSUM_FMT " found " CSUM_FMT " level %d",
eb->start,
"checksum verify failed on logical %llu mirror %u wanted " CSUM_FMT " found " CSUM_FMT " level %d",
eb->start, eb->read_mirror,
CSUM_FMT_VALUE(csum_size, header_csum),
CSUM_FMT_VALUE(csum_size, result),
btrfs_header_level(eb));
@ -603,8 +605,8 @@ static int validate_extent_buffer(struct extent_buffer *eb)
set_extent_buffer_uptodate(eb);
else
btrfs_err(fs_info,
"block=%llu read time tree block corruption detected",
eb->start);
"read time tree block corruption detected on logical %llu mirror %u",
eb->start, eb->read_mirror);
out:
return ret;
}