btrfs: dev delete should remove sysfs entry

when we delete the device from the mounted btrfs,
we would need its corresponding sysfs enty to
be removed as well.

Signed-off-by: Anand Jain <Anand.Jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 1395efbffa2d..401677b11045 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -605,6 +605,26 @@ static void init_feature_attrs(void)
         }
 }
 
+int btrfs_kobj_rm_device(struct btrfs_fs_info *fs_info,
+                struct btrfs_device *one_device)
+{
+        struct hd_struct *disk;
+        struct kobject *disk_kobj;
+
+        if (!fs_info->device_dir_kobj)
+                return -EINVAL;
+
+        if (one_device) {
+                disk = one_device->bdev->bd_part;
+                disk_kobj = &part_to_dev(disk)->kobj;
+
+                sysfs_remove_link(fs_info->device_dir_kobj,
+                                                disk_kobj->name);
+        }
+
+        return 0;
+}
+
 static int btrfs_kobj_add_device(struct btrfs_fs_info *fs_info)
 {
         int error = 0;