[mirror_ubuntu-artful-kernel.git] / fs / btrfs / sysfs.h

#ifndef _BTRFS_SYSFS_H_
#define _BTRFS_SYSFS_H_

/*
 * Data exported through sysfs
 */
extern u64 btrfs_debugfs_test;

enum btrfs_feature_set {
	FEAT_COMPAT,
	FEAT_COMPAT_RO,
	FEAT_INCOMPAT,
	FEAT_MAX
};

#define __INIT_KOBJ_ATTR(_name, _mode, _show, _store)			\
{									\
	.attr	= { .name = __stringify(_name), .mode = _mode },	\
	.show	= _show,						\
	.store	= _store,						\
}

#define BTRFS_ATTR_RW(_name, _mode, _show, _store)			\
static struct kobj_attribute btrfs_attr_##_name =			\
			__INIT_KOBJ_ATTR(_name, _mode, _show, _store)
#define BTRFS_ATTR(_name, _mode, _show)					\
	BTRFS_ATTR_RW(_name, _mode, _show, NULL)
#define BTRFS_ATTR_PTR(_name)    (&btrfs_attr_##_name.attr)

#define BTRFS_RAID_ATTR(_name, _show)					\
static struct kobj_attribute btrfs_raid_attr_##_name =			\
			__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
#define BTRFS_RAID_ATTR_PTR(_name)    (&btrfs_raid_attr_##_name.attr)


struct btrfs_feature_attr {
	struct kobj_attribute kobj_attr;
	enum btrfs_feature_set feature_set;
	u64 feature_bit;
};

#define BTRFS_FEAT_ATTR(_name, _feature_set, _prefix, _feature_bit)	     \
static struct btrfs_feature_attr btrfs_attr_##_name = {			     \
	.kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO,			     \
				      btrfs_feature_attr_show,		     \
				      btrfs_feature_attr_store),	     \
	.feature_set	= _feature_set,					     \
	.feature_bit	= _prefix ##_## _feature_bit,			     \
}
#define BTRFS_FEAT_ATTR_PTR(_name)    (&btrfs_attr_##_name.kobj_attr.attr)

#define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
	BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
#define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
	BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT, feature)
#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
	BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)

/* convert from attribute */
#define to_btrfs_feature_attr(a) \
			container_of(a, struct btrfs_feature_attr, kobj_attr)
#define attr_to_btrfs_attr(a) container_of(a, struct kobj_attribute, attr)
#define attr_to_btrfs_feature_attr(a) \
			to_btrfs_feature_attr(attr_to_btrfs_attr(a))
char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
extern const char * const btrfs_feature_set_names[3];
extern struct kobj_type space_info_ktype;
extern struct kobj_type btrfs_raid_ktype;
int btrfs_kobj_rm_device(struct btrfs_fs_info *fs_info,
                struct btrfs_device *one_device);
#endif /* _BTRFS_SYSFS_H_ */
Commit	Line	Data
079b72bc JM	1	#ifndef _BTRFS_SYSFS_H_
	2	#define _BTRFS_SYSFS_H_
	3
1bae3098 DS	4	/*
	5	* Data exported through sysfs
	6	*/
	7	extern u64 btrfs_debugfs_test;
	8
079b72bc JM	9	enum btrfs_feature_set {
	10	FEAT_COMPAT,
	11	FEAT_COMPAT_RO,
	12	FEAT_INCOMPAT,
	13	FEAT_MAX
	14	};
	15
	16	#define __INIT_KOBJ_ATTR(_name, _mode, _show, _store) \
	17	{ \
	18	.attr = { .name = __stringify(_name), .mode = _mode }, \
	19	.show = _show, \
	20	.store = _store, \
	21	}
	22
5ac1d209 JM	23	#define BTRFS_ATTR_RW(_name, _mode, _show, _store) \
	24	static struct kobj_attribute btrfs_attr_##_name = \
	25	__INIT_KOBJ_ATTR(_name, _mode, _show, _store)
	26	#define BTRFS_ATTR(_name, _mode, _show) \
	27	BTRFS_ATTR_RW(_name, _mode, _show, NULL)
	28	#define BTRFS_ATTR_PTR(_name) (&btrfs_attr_##_name.attr)
	29
6ab0a202 JM	30	#define BTRFS_RAID_ATTR(_name, _show) \
	31	static struct kobj_attribute btrfs_raid_attr_##_name = \
	32	__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
	33	#define BTRFS_RAID_ATTR_PTR(_name) (&btrfs_raid_attr_##_name.attr)
	34
	35
079b72bc JM	36	struct btrfs_feature_attr {
	37	struct kobj_attribute kobj_attr;
	38	enum btrfs_feature_set feature_set;
	39	u64 feature_bit;
	40	};
	41
	42	#define BTRFS_FEAT_ATTR(_name, _feature_set, _prefix, _feature_bit) \
	43	static struct btrfs_feature_attr btrfs_attr_##_name = { \
	44	.kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \
ba631941 JM	45	btrfs_feature_attr_show, \
ba631941 JM	46	btrfs_feature_attr_store), \
079b72bc JM	47	.feature_set = _feature_set, \
	48	.feature_bit = _prefix ##_## _feature_bit, \
	49	}
	50	#define BTRFS_FEAT_ATTR_PTR(_name) (&btrfs_attr_##_name.kobj_attr.attr)
	51
	52	#define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
	53	BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
	54	#define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
	55	BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT, feature)
	56	#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
	57	BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
	58
	59	/* convert from attribute */
	60	#define to_btrfs_feature_attr(a) \
	61	container_of(a, struct btrfs_feature_attr, kobj_attr)
5ac1d209 JM	62	#define attr_to_btrfs_attr(a) container_of(a, struct kobj_attribute, attr)
	63	#define attr_to_btrfs_feature_attr(a) \
	64	to_btrfs_feature_attr(attr_to_btrfs_attr(a))
3b02a68a JM	65	char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
3b02a68a JM	66	extern const char * const btrfs_feature_set_names[3];
6ab0a202 JM	67	extern struct kobj_type space_info_ktype;
6ab0a202 JM	68	extern struct kobj_type btrfs_raid_ktype;
99994cde AJ	69	int btrfs_kobj_rm_device(struct btrfs_fs_info *fs_info,
99994cde AJ	70	struct btrfs_device *one_device);
079b72bc	71	#endif /* _BTRFS_SYSFS_H_ */