btrfs: balance: print to system log when balance ends or is paused

Print a kernel log message when the balance ends, either for cancel or
completed or if it is paused.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index cdba4f0..2085d4d 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4287,6 +4287,13 @@ int btrfs_balance(struct btrfs_fs_info *fs_info,
        ret = __btrfs_balance(fs_info);
 
        mutex_lock(&fs_info->balance_mutex);
+       if (ret == -ECANCELED && atomic_read(&fs_info->balance_pause_req))
+               btrfs_info(fs_info, "balance: paused");
+       else if (ret == -ECANCELED && atomic_read(&fs_info->balance_cancel_req))
+               btrfs_info(fs_info, "balance: canceled");
+       else
+               btrfs_info(fs_info, "balance: ended with status: %d", ret);
+
        clear_bit(BTRFS_FS_BALANCE_RUNNING, &fs_info->flags);
 
        if (bargs) {