1/* SPDX-License-Identifier: GPL-2.0 */
 2
 3#ifndef BTRFS_SYSFS_H
 4#define BTRFS_SYSFS_H
 5
 6#include <linux/kobject.h>
 
 
 
 7
 8enum btrfs_feature_set {
 9	FEAT_COMPAT,
10	FEAT_COMPAT_RO,
11	FEAT_INCOMPAT,
12	FEAT_MAX
13};
14
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
15char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
16const char * const btrfs_feature_set_name(enum btrfs_feature_set set);
 
 
17int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
18		struct btrfs_device *one_device);
19int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
20                struct btrfs_device *one_device);
21int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
22				struct kobject *parent);
23int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
24void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
25void btrfs_sysfs_update_sprout_fsid(struct btrfs_fs_devices *fs_devices,
26				    const u8 *fsid);
27void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
28		u64 bit, enum btrfs_feature_set set);
29void btrfs_kobject_uevent(struct block_device *bdev, enum kobject_action action);
30
31int __init btrfs_init_sysfs(void);
32void __cold btrfs_exit_sysfs(void);
33int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
34void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
35void btrfs_sysfs_add_block_group_type(struct btrfs_block_group_cache *cache);
36int btrfs_sysfs_add_space_info_type(struct btrfs_fs_info *fs_info,
37				    struct btrfs_space_info *space_info);
38void btrfs_sysfs_remove_space_info(struct btrfs_space_info *space_info);
39
40#endif

 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 */
 9extern u64 btrfs_debugfs_test;
10
11enum 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
37struct 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)  \
44static 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 */
62static inline struct btrfs_feature_attr *
63to_btrfs_feature_attr(struct kobj_attribute *a)
64{
65	return container_of(a, struct btrfs_feature_attr, kobj_attr);
66}
67
68static inline struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr)
69{
70	return container_of(attr, struct kobj_attribute, attr);
71}
72
73static inline struct btrfs_feature_attr *
74attr_to_btrfs_feature_attr(struct attribute *attr)
75{
76	return to_btrfs_feature_attr(attr_to_btrfs_attr(attr));
77}
78
79char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
80extern const char * const btrfs_feature_set_names[3];
81extern struct kobj_type space_info_ktype;
82extern struct kobj_type btrfs_raid_ktype;
83int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
84		struct btrfs_device *one_device);
85int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
86                struct btrfs_device *one_device);
87int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
88				struct kobject *parent);
89int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
90void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
 
 
91void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
92		u64 bit, enum btrfs_feature_set set);
 
 
 
 
 
 
 
 
 
 
93
94#endif