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Commit aaf13305 authored by Anand Jain's avatar Anand Jain Committed by David Sterba
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Btrfs: sysfs: reorder the kobject creations 



As of now the order in which the kobjects are created
at btrfs_sysfs_add_one() is..
 fsid
 features
 unknown features (dynamic features)
 devices.

Since we would move fsid and device kobject to fs_devices
from fs_info structure, this patch will reorder in which
the kobjects are created as below.
 fsid
 devices
 features
 unknown features (dynamic features)

And hence the btrfs_sysfs_remove_one() will follow the same
in reverse order. and the device kobject destroy now can
be moved into the function __btrfs_sysfs_remove_one()

Signed-off-by: default avatarAnand Jain <anand.jain@oracle.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.cz>
parent 4d435731

fs/btrfs/sysfs.c

+13 −10
Original line number Diff line number Diff line
@@ -510,6 +510,13 @@ static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add) 


static void __btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info)

{

	if (fs_info->device_dir_kobj) {

		btrfs_kobj_rm_device(fs_info, NULL);

		kobject_del(fs_info->device_dir_kobj);

		kobject_put(fs_info->device_dir_kobj);

		fs_info->device_dir_kobj = NULL;

	}



	kobject_del(&fs_info->super_kobj);

	kobject_put(&fs_info->super_kobj);

	wait_for_completion(&fs_info->kobj_unregister);
@@ -522,12 +529,6 @@ void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info) 
		kobject_del(fs_info->space_info_kobj);

		kobject_put(fs_info->space_info_kobj);

	}

	if (fs_info->device_dir_kobj) {

		btrfs_kobj_rm_device(fs_info, NULL);

		kobject_del(fs_info->device_dir_kobj);

		kobject_put(fs_info->device_dir_kobj);

		fs_info->device_dir_kobj = NULL;

	}

	addrm_unknown_feature_attrs(fs_info, false);

	sysfs_remove_group(&fs_info->super_kobj, &btrfs_feature_attr_group);

	__btrfs_sysfs_remove_one(fs_info);
@@ -700,6 +701,12 @@ int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info) 
	if (error)

		return error;



	error = btrfs_kobj_add_device(fs_info, NULL);

	if (error) {

		__btrfs_sysfs_remove_one(fs_info);

		return error;

	}



	error = sysfs_create_group(&fs_info->super_kobj,

				   &btrfs_feature_attr_group);

	if (error) {
@@ -711,10 +718,6 @@ int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info) 
	if (error)

		goto failure;



	error = btrfs_kobj_add_device(fs_info, NULL);

	if (error)

		goto failure;



	fs_info->space_info_kobj = kobject_create_and_add("allocation",

						  &fs_info->super_kobj);

	if (!fs_info->space_info_kobj) {