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079b72bc JM |
1 | #ifndef _BTRFS_SYSFS_H_ |
2 | #define _BTRFS_SYSFS_H_ | |
3 | ||
1bae3098 DS |
4 | /* |
5 | * Data exported through sysfs | |
6 | */ | |
7 | extern u64 btrfs_debugfs_test; | |
8 | ||
079b72bc JM |
9 | enum 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 | ||
5ac1d209 JM |
23 | #define BTRFS_ATTR_RW(_name, _mode, _show, _store) \ |
24 | static struct kobj_attribute btrfs_attr_##_name = \ | |
25 | __INIT_KOBJ_ATTR(_name, _mode, _show, _store) | |
26 | #define BTRFS_ATTR(_name, _mode, _show) \ | |
27 | BTRFS_ATTR_RW(_name, _mode, _show, NULL) | |
28 | #define BTRFS_ATTR_PTR(_name) (&btrfs_attr_##_name.attr) | |
29 | ||
6ab0a202 JM |
30 | #define BTRFS_RAID_ATTR(_name, _show) \ |
31 | static struct kobj_attribute btrfs_raid_attr_##_name = \ | |
32 | __INIT_KOBJ_ATTR(_name, 0444, _show, NULL) | |
33 | #define BTRFS_RAID_ATTR_PTR(_name) (&btrfs_raid_attr_##_name.attr) | |
34 | ||
35 | ||
079b72bc JM |
36 | struct 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, _prefix, _feature_bit) \ | |
43 | static struct btrfs_feature_attr btrfs_attr_##_name = { \ | |
44 | .kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \ | |
ba631941 JM |
45 | btrfs_feature_attr_show, \ |
46 | btrfs_feature_attr_store), \ | |
079b72bc JM |
47 | .feature_set = _feature_set, \ |
48 | .feature_bit = _prefix ##_## _feature_bit, \ | |
49 | } | |
50 | #define BTRFS_FEAT_ATTR_PTR(_name) (&btrfs_attr_##_name.kobj_attr.attr) | |
51 | ||
52 | #define BTRFS_FEAT_ATTR_COMPAT(name, feature) \ | |
53 | BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature) | |
54 | #define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \ | |
55 | BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT, feature) | |
56 | #define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \ | |
57 | BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature) | |
58 | ||
59 | /* convert from attribute */ | |
60 | #define to_btrfs_feature_attr(a) \ | |
61 | container_of(a, struct btrfs_feature_attr, kobj_attr) | |
5ac1d209 JM |
62 | #define attr_to_btrfs_attr(a) container_of(a, struct kobj_attribute, attr) |
63 | #define attr_to_btrfs_feature_attr(a) \ | |
64 | to_btrfs_feature_attr(attr_to_btrfs_attr(a)) | |
3b02a68a JM |
65 | char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags); |
66 | extern const char * const btrfs_feature_set_names[3]; | |
6ab0a202 JM |
67 | extern struct kobj_type space_info_ktype; |
68 | extern struct kobj_type btrfs_raid_ktype; | |
079b72bc | 69 | #endif /* _BTRFS_SYSFS_H_ */ |