Merge tag 'v3.17-rockchip-rk3288' of git://git.kernel.org/pub/scm/linux/kernel/git...

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / sysfs.c

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index df39458f14879999c2b1bce5b59d06e626ccbf1d..78699364f537c423b9fa25cb0e3c124ded8c6ce7 100644 (file)
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -605,14 +605,37 @@ static void init_feature_attrs(void)
        }
 }
 
-static int add_device_membership(struct btrfs_fs_info *fs_info)
+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;
+}
+
+int btrfs_kobj_add_device(struct btrfs_fs_info *fs_info,
+               struct btrfs_device *one_device)
 {
        int error = 0;
        struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
        struct btrfs_device *dev;
 
-       fs_info->device_dir_kobj = kobject_create_and_add("devices",
+       if (!fs_info->device_dir_kobj)
+               fs_info->device_dir_kobj = kobject_create_and_add("devices",
                                                &fs_info->super_kobj);
+
        if (!fs_info->device_dir_kobj)
                return -ENOMEM;
 
@@ -623,6 +646,9 @@ static int add_device_membership(struct btrfs_fs_info *fs_info)
                if (!dev->bdev)
                        continue;
 
+               if (one_device && one_device != dev)
+                       continue;
+
                disk = dev->bdev->bd_part;
                disk_kobj = &part_to_dev(disk)->kobj;
 
@@ -666,7 +692,7 @@ int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info)
        if (error)
                goto failure;
 
-       error = add_device_membership(fs_info);
+       error = btrfs_kobj_add_device(fs_info, NULL);
        if (error)
                goto failure;