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 *btrfs_feature_set_name(enum btrfs_feature_set set);
17int btrfs_sysfs_add_device(struct btrfs_device *device);
18void btrfs_sysfs_remove_device(struct btrfs_device *device);
19int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs);
 
 
 
 
 
 
20void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
21void btrfs_sysfs_update_sprout_fsid(struct btrfs_fs_devices *fs_devices);
22void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info);
23void btrfs_kobject_uevent(struct block_device *bdev, enum kobject_action action);
24
25int __init btrfs_init_sysfs(void);
26void __cold btrfs_exit_sysfs(void);
27int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
28void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
29void btrfs_sysfs_add_block_group_type(struct btrfs_block_group *cache);
30int btrfs_sysfs_add_space_info_type(struct btrfs_fs_info *fs_info,
31				    struct btrfs_space_info *space_info);
32void btrfs_sysfs_remove_space_info(struct btrfs_space_info *space_info);
33void btrfs_sysfs_update_devid(struct btrfs_device *device);
34
35int btrfs_sysfs_add_one_qgroup(struct btrfs_fs_info *fs_info,
36				struct btrfs_qgroup *qgroup);
37void btrfs_sysfs_del_qgroups(struct btrfs_fs_info *fs_info);
38int btrfs_sysfs_add_qgroups(struct btrfs_fs_info *fs_info);
39void btrfs_sysfs_del_one_qgroup(struct btrfs_fs_info *fs_info,
40				struct btrfs_qgroup *qgroup);
41
42#endif

 1#ifndef _BTRFS_SYSFS_H_
 2#define _BTRFS_SYSFS_H_
 3
 4/*
 5 * Data exported through sysfs
 6 */
 7extern u64 btrfs_debugfs_test;
 8
 9enum 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
23#define BTRFS_ATTR_RW(_name, _show, _store)			\
24	static struct kobj_attribute btrfs_attr_##_name =		\
25			__INIT_KOBJ_ATTR(_name, 0644, _show, _store)
26
27#define BTRFS_ATTR(_name, _show)					\
28	static struct kobj_attribute btrfs_attr_##_name =		\
29			__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
30
31#define BTRFS_ATTR_PTR(_name)    (&btrfs_attr_##_name.attr)
32
33#define BTRFS_RAID_ATTR(_name, _show)					\
34	static struct kobj_attribute btrfs_raid_attr_##_name =		\
35			__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
36
37#define BTRFS_RAID_ATTR_PTR(_name)    (&btrfs_raid_attr_##_name.attr)
38
39
40struct 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)	     \
47static struct btrfs_feature_attr btrfs_attr_##_name = {			     \
48	.kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO,			     \
49				      btrfs_feature_attr_show,		     \
50				      btrfs_feature_attr_store),	     \
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) \
59	BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature)
60#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
61	BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
62
63/* convert from attribute */
64static inline struct btrfs_feature_attr *
65to_btrfs_feature_attr(struct kobj_attribute *a)
66{
67	return container_of(a, struct btrfs_feature_attr, kobj_attr);
68}
69
70static inline struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr)
71{
72	return container_of(attr, struct kobj_attribute, attr);
73}
74
75static inline struct btrfs_feature_attr *
76attr_to_btrfs_feature_attr(struct attribute *attr)
77{
78	return to_btrfs_feature_attr(attr_to_btrfs_attr(attr));
79}
80
81char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
82extern const char * const btrfs_feature_set_names[3];
83extern struct kobj_type space_info_ktype;
84extern struct kobj_type btrfs_raid_ktype;
85int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
86		struct btrfs_device *one_device);
87int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
88                struct btrfs_device *one_device);
89int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
90				struct kobject *parent);
91int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
92void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
93void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
94		u64 bit, enum btrfs_feature_set set);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
95
96#endif /* _BTRFS_SYSFS_H_ */