btrfs: scrub: update message regarding read-only status

Based on user feedback update the message printed when scrub fails to
start due to write requirements. To make a distinction add a device id
to the messages.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index cf63f1e..e71e758 100644 (file)
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -3866,8 +3866,9 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
        if (!is_dev_replace && !readonly &&
            !test_bit(BTRFS_DEV_STATE_WRITEABLE, &dev->dev_state)) {
                mutex_unlock(&fs_info->fs_devices->device_list_mutex);
-               btrfs_err_in_rcu(fs_info, "scrub: device %s is not writable",
-                               rcu_str_deref(dev->name));
+               btrfs_err_in_rcu(fs_info,
+                       "scrub on devid %llu: filesystem on %s is not writable",
+                                devid, rcu_str_deref(dev->name));
                ret = -EROFS;
                goto out;
        }