[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, _show, _store)			\
	static struct kobj_attribute btrfs_attr_##_name =		\
			__INIT_KOBJ_ATTR(_name, 0644, _show, _store)

#define BTRFS_ATTR(_name, _show)					\
	static struct kobj_attribute btrfs_attr_##_name =		\
			__INIT_KOBJ_ATTR(_name, 0444, _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_RO, feature)
#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
	BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)

/* convert from attribute */
static inline struct btrfs_feature_attr *
to_btrfs_feature_attr(struct kobj_attribute *a)
{
	return container_of(a, struct btrfs_feature_attr, kobj_attr);
}

static inline struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr)
{
	return container_of(attr, struct kobj_attribute, attr);
}

static inline struct btrfs_feature_attr *
attr_to_btrfs_feature_attr(struct attribute *attr)
{
	return to_btrfs_feature_attr(attr_to_btrfs_attr(attr));
}

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_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
		struct btrfs_device *one_device);
int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
                struct btrfs_device *one_device);
int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
				struct kobject *parent);
int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
		u64 bit, enum btrfs_feature_set set);

#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
20ee0825	23	#define BTRFS_ATTR_RW(_name, _show, _store) \
98b3d389	24	static struct kobj_attribute btrfs_attr_##_name = \
20ee0825	25	__INIT_KOBJ_ATTR(_name, 0644, _show, _store)
98b3d389 AJ	26
98b3d389 AJ	27	#define BTRFS_ATTR(_name, _show) \
20ee0825 AJ	28	static struct kobj_attribute btrfs_attr_##_name = \
20ee0825 AJ	29	__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
98b3d389	30
5ac1d209 JM	31	#define BTRFS_ATTR_PTR(_name) (&btrfs_attr_##_name.attr)
5ac1d209 JM	32
6ab0a202	33	#define BTRFS_RAID_ATTR(_name, _show) \
98b3d389	34	static struct kobj_attribute btrfs_raid_attr_##_name = \
6ab0a202	35	__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
98b3d389	36
6ab0a202 JM	37	#define BTRFS_RAID_ATTR_PTR(_name) (&btrfs_raid_attr_##_name.attr)
	38
	39
079b72bc JM	40	struct btrfs_feature_attr {
	41	struct kobj_attribute kobj_attr;
	42	enum btrfs_feature_set feature_set;
	43	u64 feature_bit;
	44	};
	45
	46	#define BTRFS_FEAT_ATTR(_name, _feature_set, _prefix, _feature_bit) \
	47	static struct btrfs_feature_attr btrfs_attr_##_name = { \
	48	.kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \
ba631941 JM	49	btrfs_feature_attr_show, \
ba631941 JM	50	btrfs_feature_attr_store), \
079b72bc JM	51	.feature_set = _feature_set, \
	52	.feature_bit = _prefix ##_## _feature_bit, \
	53	}
	54	#define BTRFS_FEAT_ATTR_PTR(_name) (&btrfs_attr_##_name.kobj_attr.attr)
	55
	56	#define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
	57	BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
	58	#define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
ba2d0840	59	BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature)
079b72bc JM	60	#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
	61	BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
	62
	63	/* convert from attribute */
093adbce DS	64	static inline struct btrfs_feature_attr *
	65	to_btrfs_feature_attr(struct kobj_attribute *a)
	66	{
	67	return container_of(a, struct btrfs_feature_attr, kobj_attr);
	68	}
	69
	70	static inline struct kobj_attribute attr_to_btrfs_attr(struct attribute attr)
	71	{
	72	return container_of(attr, struct kobj_attribute, attr);
	73	}
	74
	75	static inline struct btrfs_feature_attr *
	76	attr_to_btrfs_feature_attr(struct attribute *attr)
	77	{
	78	return to_btrfs_feature_attr(attr_to_btrfs_attr(attr));
	79	}
	80
3b02a68a JM	81	char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
3b02a68a JM	82	extern const char * const btrfs_feature_set_names[3];
6ab0a202 JM	83	extern struct kobj_type space_info_ktype;
6ab0a202 JM	84	extern struct kobj_type btrfs_raid_ktype;
e3bd6973	85	int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
0d39376a	86	struct btrfs_device *one_device);
32576040	87	int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
99994cde	88	struct btrfs_device *one_device);
0c10e2d4 AJ	89	int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
0c10e2d4 AJ	90	struct kobject *parent);
ef1a0daa	91	int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
1d1c1be3	92	void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
444e7516 DS	93	void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
	94	u64 bit, enum btrfs_feature_set set);
	95
079b72bc	96	#endif /* _BTRFS_SYSFS_H_ */