tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BTRFS_SYSFS_H_
3#define _BTRFS_SYSFS_H_
4
5/*
6 * Data exported through sysfs
7 */
8extern u64 btrfs_debugfs_test;
9
10enum 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
24#define BTRFS_ATTR_RW(_prefix, _name, _show, _store) \
25 static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \
26 __INIT_KOBJ_ATTR(_name, 0644, _show, _store)
27
28#define BTRFS_ATTR(_prefix, _name, _show) \
29 static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \
30 __INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
31
32#define BTRFS_ATTR_PTR(_prefix, _name) \
33 (&btrfs_attr_##_prefix##_##_name.attr)
34
35
36struct btrfs_feature_attr {
37 struct kobj_attribute kobj_attr;
38 enum btrfs_feature_set feature_set;
39 u64 feature_bit;
40};
41
42#define BTRFS_FEAT_ATTR(_name, _feature_set, _feature_prefix, _feature_bit) \
43static struct btrfs_feature_attr btrfs_attr_features_##_name = { \
44 .kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \
45 btrfs_feature_attr_show, \
46 btrfs_feature_attr_store), \
47 .feature_set = _feature_set, \
48 .feature_bit = _feature_prefix ##_## _feature_bit, \
49}
50#define BTRFS_FEAT_ATTR_PTR(_name) \
51 (&btrfs_attr_features_##_name.kobj_attr.attr)
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) \
56 BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature)
57#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
58 BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
59
60/* convert from attribute */
61static inline struct btrfs_feature_attr *
62to_btrfs_feature_attr(struct kobj_attribute *a)
63{
64 return container_of(a, struct btrfs_feature_attr, kobj_attr);
65}
66
67static inline struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr)
68{
69 return container_of(attr, struct kobj_attribute, attr);
70}
71
72static inline struct btrfs_feature_attr *
73attr_to_btrfs_feature_attr(struct attribute *attr)
74{
75 return to_btrfs_feature_attr(attr_to_btrfs_attr(attr));
76}
77
78char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
79extern const char * const btrfs_feature_set_names[3];
80extern struct kobj_type space_info_ktype;
81extern struct kobj_type btrfs_raid_ktype;
82int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
83 struct btrfs_device *one_device);
84int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
85 struct btrfs_device *one_device);
86int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
87 struct kobject *parent);
88int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
89void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
90void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
91 u64 bit, enum btrfs_feature_set set);
92
93#endif /* _BTRFS_SYSFS_H_ */