Patch "btrfs: make error messages more clear when getting a chunk map" has been added to the 5.10-stable tree

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This is a note to let you know that I've just added the patch titled

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

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     btrfs-make-error-messages-more-clear-when-getting-a-chunk-map.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 7d410d5efe04e42a6cd959bfe6d59d559fdf8b25 Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@xxxxxxxx>
Date: Tue, 21 Nov 2023 13:38:33 +0000
Subject: btrfs: make error messages more clear when getting a chunk map

From: Filipe Manana <fdmanana@xxxxxxxx>

commit 7d410d5efe04e42a6cd959bfe6d59d559fdf8b25 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@xxxxxxxxxxxxxxx # 5.4+
Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 fs/btrfs/volumes.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2993,15 +2993,16 @@ struct extent_map *btrfs_get_chunk_map(s
 	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);
 	}


Patches currently in stable-queue which might be from fdmanana@xxxxxxxx are

queue-5.10/btrfs-fix-off-by-one-when-checking-chunk-map-includes-logical-address.patch
queue-5.10/btrfs-make-error-messages-more-clear-when-getting-a-chunk-map.patch



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