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
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