Commit e4faab84 authored by Dennis Zhou's avatar Dennis Zhou Committed by David Sterba
Browse files

btrfs: sysfs: add UUID/debug/discard directory 



Setup base sysfs directory for discard stats + tunables.

Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Reviewed-by: default avatarAnand Jain <anand.jain@oracle.com>
Signed-off-by: default avatarDennis Zhou <dennis@kernel.org>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 93945cb4

fs/btrfs/ctree.h

+1 −0
Original line number Diff line number Diff line
@@ -930,6 +930,7 @@ struct btrfs_fs_info { 


#ifdef CONFIG_BTRFS_DEBUG

	struct kobject *debug_kobj;

	struct kobject *discard_debug_kobj;

#endif

};

fs/btrfs/sysfs.c

+26 −0
Original line number Diff line number Diff line
@@ -338,6 +338,13 @@ static const struct attribute_group btrfs_static_feature_attr_group = { 


#ifdef CONFIG_BTRFS_DEBUG



/*

 * Discard statistics and tunables

 */

static const struct attribute *discard_debug_attrs[] = {

	NULL,

};



/*

 * Runtime debugging exported via sysfs

 *
@@ -776,6 +783,12 @@ void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info) 
		kobject_put(fs_info->space_info_kobj);

	}

#ifdef CONFIG_BTRFS_DEBUG

	if (fs_info->discard_debug_kobj) {

		sysfs_remove_files(fs_info->discard_debug_kobj,

				   discard_debug_attrs);

		kobject_del(fs_info->discard_debug_kobj);

		kobject_put(fs_info->discard_debug_kobj);

	}

	if (fs_info->debug_kobj) {

		sysfs_remove_files(fs_info->debug_kobj, btrfs_debug_mount_attrs);

		kobject_del(fs_info->debug_kobj);
@@ -1127,6 +1140,19 @@ int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info) 
	error = sysfs_create_files(fs_info->debug_kobj, btrfs_debug_mount_attrs);

	if (error)

		goto failure;



	/* Discard directory */

	fs_info->discard_debug_kobj = kobject_create_and_add("discard",

						     fs_info->debug_kobj);

	if (!fs_info->discard_debug_kobj) {

		error = -ENOMEM;

		goto failure;

	}



	error = sysfs_create_files(fs_info->discard_debug_kobj,

				   discard_debug_attrs);

	if (error)

		goto failure;

#endif



	error = addrm_unknown_feature_attrs(fs_info, true);