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

/* SPDX-License-Identifier: GPL-2.0 */
#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(_prefix, _name, _show, _store)			\
	static struct kobj_attribute btrfs_attr_##_prefix##_##_name =	\
			__INIT_KOBJ_ATTR(_name, 0644, _show, _store)

#define BTRFS_ATTR(_prefix, _name, _show)				\
	static struct kobj_attribute btrfs_attr_##_prefix##_##_name =	\
			__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)

#define BTRFS_ATTR_PTR(_prefix, _name)					\
	(&btrfs_attr_##_prefix##_##_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, _feature_prefix, _feature_bit)  \
static struct btrfs_feature_attr btrfs_attr_features_##_name = {	     \
	.kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO,			     \
				      btrfs_feature_attr_show,		     \
				      btrfs_feature_attr_store),	     \
	.feature_set	= _feature_set,					     \
	.feature_bit	= _feature_prefix ##_## _feature_bit,		     \
}
#define BTRFS_FEAT_ATTR_PTR(_name)					     \
	(&btrfs_attr_features_##_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
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
079b72bc JM	2	#ifndef _BTRFS_SYSFS_H_
	3	#define _BTRFS_SYSFS_H_
	4
1bae3098 DS	5	/*
	6	* Data exported through sysfs
	7	*/
	8	extern u64 btrfs_debugfs_test;
	9
079b72bc JM	10	enum btrfs_feature_set {
	11	FEAT_COMPAT,
	12	FEAT_COMPAT_RO,
	13	FEAT_INCOMPAT,
	14	FEAT_MAX
	15	};
	16
	17	#define __INIT_KOBJ_ATTR(_name, _mode, _show, _store) \
	18	{ \
	19	.attr = { .name = __stringify(_name), .mode = _mode }, \
	20	.show = _show, \
	21	.store = _store, \
	22	}
	23
a969f4cc HK	24	#define BTRFS_ATTR_RW(_prefix, _name, _show, _store) \
a969f4cc HK	25	static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \
20ee0825	26	__INIT_KOBJ_ATTR(_name, 0644, _show, _store)
98b3d389	27
a969f4cc HK	28	#define BTRFS_ATTR(_prefix, _name, _show) \
a969f4cc HK	29	static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \
20ee0825	30	__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
98b3d389	31
a969f4cc HK	32	#define BTRFS_ATTR_PTR(_prefix, _name) \
a969f4cc HK	33	(&btrfs_attr_##_prefix##_##_name.attr)
6ab0a202 JM	34
6ab0a202 JM	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
a969f4cc HK	42	#define BTRFS_FEAT_ATTR(_name, _feature_set, _feature_prefix, _feature_bit) \
a969f4cc HK	43	static struct btrfs_feature_attr btrfs_attr_features_##_name = { \
079b72bc	44	.kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \
ba631941 JM	45	btrfs_feature_attr_show, \
ba631941 JM	46	btrfs_feature_attr_store), \
079b72bc	47	.feature_set = _feature_set, \
a969f4cc	48	.feature_bit = _feature_prefix ##_## _feature_bit, \
079b72bc	49	}
a969f4cc HK	50	#define BTRFS_FEAT_ATTR_PTR(_name) \
a969f4cc HK	51	(&btrfs_attr_features_##_name.kobj_attr.attr)
079b72bc JM	52
	53	#define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
	54	BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
	55	#define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
ba2d0840	56	BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature)
079b72bc JM	57	#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
	58	BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
	59
	60	/* convert from attribute */
093adbce DS	61	static inline struct btrfs_feature_attr *
	62	to_btrfs_feature_attr(struct kobj_attribute *a)
	63	{
	64	return container_of(a, struct btrfs_feature_attr, kobj_attr);
	65	}
	66
	67	static inline struct kobj_attribute attr_to_btrfs_attr(struct attribute attr)
	68	{
	69	return container_of(attr, struct kobj_attribute, attr);
	70	}
	71
	72	static inline struct btrfs_feature_attr *
	73	attr_to_btrfs_feature_attr(struct attribute *attr)
	74	{
	75	return to_btrfs_feature_attr(attr_to_btrfs_attr(attr));
	76	}
	77
3b02a68a JM	78	char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
3b02a68a JM	79	extern const char * const btrfs_feature_set_names[3];
6ab0a202 JM	80	extern struct kobj_type space_info_ktype;
6ab0a202 JM	81	extern struct kobj_type btrfs_raid_ktype;
e3bd6973	82	int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
0d39376a	83	struct btrfs_device *one_device);
32576040	84	int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
99994cde	85	struct btrfs_device *one_device);
0c10e2d4 AJ	86	int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
0c10e2d4 AJ	87	struct kobject *parent);
ef1a0daa	88	int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
1d1c1be3	89	void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
444e7516 DS	90	void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
	91	u64 bit, enum btrfs_feature_set set);
	92
079b72bc	93	#endif /* _BTRFS_SYSFS_H_ */