Marc argued that if there are several btrfs filesystems mounted,
while users even don't know which filesystem hit the corrupted
errors something like generation verification failure.

Since @extent_buffer structure has a member @fs_info, let's output
btrfs device info.

Reported-by: Marc MERLIN <[email protected]>
Signed-off-by: Wang Shilong <[email protected]>
---
Tell me if missed anything here...
---
 fs/btrfs/disk-io.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 08e65e9..bd52ca0 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -351,9 +351,9 @@ static int verify_parent_transid(struct extent_io_tree 
*io_tree,
                ret = 0;
                goto out;
        }
-       printk_ratelimited("parent transid verify failed on %llu wanted %llu "
-                      "found %llu\n",
-                      eb->start, parent_transid, btrfs_header_generation(eb));
+       printk_ratelimited("BTRFS (device %s): parent transid verify failed on 
%llu wanted %llu found %llu\n",
+                       eb->fs_info->sb->s_id, eb->start,
+                       parent_transid, btrfs_header_generation(eb));
        ret = 1;
 
        /*
@@ -617,15 +617,15 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio 
*io_bio,
 
        found_start = btrfs_header_bytenr(eb);
        if (found_start != eb->start) {
-               printk_ratelimited(KERN_INFO "BTRFS: bad tree block start "
+               printk_ratelimited(KERN_INFO "BTRFS (device %s): bad tree block 
start "
                               "%llu %llu\n",
-                              found_start, eb->start);
+                              eb->fs_info->sb->s_id, found_start, eb->start);
                ret = -EIO;
                goto err;
        }
        if (check_tree_block_fsid(root, eb)) {
-               printk_ratelimited(KERN_INFO "BTRFS: bad fsid on block %llu\n",
-                              eb->start);
+               printk_ratelimited(KERN_INFO "BTRFS (device %s): bad fsid on 
block %llu\n",
+                              eb->fs_info->sb->s_id, eb->start);
                ret = -EIO;
                goto err;
        }
-- 
1.8.3.1

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