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btrfs: make error messages more clear when getting a chunk map

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commit 7d410d5efe upstream.

When getting a chunk map, at btrfs_get_chunk_map(), we do some sanity
checks to verify we found a chunk map and that map found covers the
logical address the caller passed in. However the messages aren't very
clear in the sense that don't mention the issue is with a chunk map and
one of them prints the 'length' argument as if it were the end offset of
the requested range (while the in the string format we use %llu-%llu
which suggests a range, and the second %llu-%llu is actually a range for
the chunk map). So improve these two details in the error messages.

CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Filipe Manana
2023-11-21 13:38:33 +00:00
committed by Greg Kroah-Hartman
parent 47693835ed
commit 875eeda481
1 changed files with 4 additions and 3 deletions
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fs/btrfs/volumes.c
+4 -3
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@@ -3064,15 +3064,16 @@ struct extent_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info,
read_unlock(&em_tree->lock);
if (!em) {
btrfs_crit(fs_info, "unable to find logical %llu length %llu",
btrfs_crit(fs_info,
"unable to find chunk map for logical %llu length %llu",
logical, length);
return ERR_PTR(-EINVAL);
}
if (em->start > logical || em->start + em->len <= logical) {
btrfs_crit(fs_info,
"found a bad mapping, wanted %llu-%llu, found %llu-%llu",
logical, length, em->start, em->start + em->len);
"found a bad chunk map, wanted %llu-%llu, found %llu-%llu",
logical, logical + length, em->start, em->start + em->len);
free_extent_map(em);
return ERR_PTR(-EINVAL);
}