[linux-2.6-block.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[FEAT_MAX];
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
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0 */
	2
	3	#ifndef BTRFS_SYSFS_H
	4	#define BTRFS_SYSFS_H
	5
	6	/*
	7	* Data exported through sysfs
	8	*/
	9	extern u64 btrfs_debugfs_test;
	10
	11	enum btrfs_feature_set {
	12	FEAT_COMPAT,
	13	FEAT_COMPAT_RO,
	14	FEAT_INCOMPAT,
	15	FEAT_MAX
	16	};
	17
	18	#define __INIT_KOBJ_ATTR(_name, _mode, _show, _store) \
	19	{ \
	20	.attr = { .name = __stringify(_name), .mode = _mode }, \
	21	.show = _show, \
	22	.store = _store, \
	23	}
	24
	25	#define BTRFS_ATTR_RW(_prefix, _name, _show, _store) \
	26	static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \
	27	__INIT_KOBJ_ATTR(_name, 0644, _show, _store)
	28
	29	#define BTRFS_ATTR(_prefix, _name, _show) \
	30	static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \
	31	__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
	32
	33	#define BTRFS_ATTR_PTR(_prefix, _name) \
	34	(&btrfs_attr_##_prefix##_##_name.attr)
	35
	36
	37	struct btrfs_feature_attr {
	38	struct kobj_attribute kobj_attr;
	39	enum btrfs_feature_set feature_set;
	40	u64 feature_bit;
	41	};
	42
	43	#define BTRFS_FEAT_ATTR(_name, _feature_set, _feature_prefix, _feature_bit) \
	44	static struct btrfs_feature_attr btrfs_attr_features_##_name = { \
	45	.kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \
	46	btrfs_feature_attr_show, \
	47	btrfs_feature_attr_store), \
	48	.feature_set = _feature_set, \
	49	.feature_bit = _feature_prefix ##_## _feature_bit, \
	50	}
	51	#define BTRFS_FEAT_ATTR_PTR(_name) \
	52	(&btrfs_attr_features_##_name.kobj_attr.attr)
	53
	54	#define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
	55	BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
	56	#define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
	57	BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature)
	58	#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
	59	BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
	60
	61	/* convert from attribute */
	62	static inline struct btrfs_feature_attr *
	63	to_btrfs_feature_attr(struct kobj_attribute *a)
	64	{
	65	return container_of(a, struct btrfs_feature_attr, kobj_attr);
	66	}
	67
	68	static inline struct kobj_attribute attr_to_btrfs_attr(struct attribute attr)
	69	{
	70	return container_of(attr, struct kobj_attribute, attr);
	71	}
	72
	73	static inline struct btrfs_feature_attr *
	74	attr_to_btrfs_feature_attr(struct attribute *attr)
	75	{
	76	return to_btrfs_feature_attr(attr_to_btrfs_attr(attr));
	77	}
	78
	79	char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
	80	extern const char * const btrfs_feature_set_names[FEAT_MAX];
	81	extern struct kobj_type space_info_ktype;
	82	extern struct kobj_type btrfs_raid_ktype;
	83	int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
	84	struct btrfs_device *one_device);
	85	int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
	86	struct btrfs_device *one_device);
	87	int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
	88	struct kobject *parent);
	89	int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
	90	void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
	91	void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
	92	u64 bit, enum btrfs_feature_set set);
	93
	94	#endif