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079b72bc JM |
1 | #ifndef _BTRFS_SYSFS_H_ |
2 | #define _BTRFS_SYSFS_H_ | |
3 | ||
4 | enum btrfs_feature_set { | |
5 | FEAT_COMPAT, | |
6 | FEAT_COMPAT_RO, | |
7 | FEAT_INCOMPAT, | |
8 | FEAT_MAX | |
9 | }; | |
10 | ||
11 | #define __INIT_KOBJ_ATTR(_name, _mode, _show, _store) \ | |
12 | { \ | |
13 | .attr = { .name = __stringify(_name), .mode = _mode }, \ | |
14 | .show = _show, \ | |
15 | .store = _store, \ | |
16 | } | |
17 | ||
5ac1d209 JM |
18 | #define BTRFS_ATTR_RW(_name, _mode, _show, _store) \ |
19 | static struct kobj_attribute btrfs_attr_##_name = \ | |
20 | __INIT_KOBJ_ATTR(_name, _mode, _show, _store) | |
21 | #define BTRFS_ATTR(_name, _mode, _show) \ | |
22 | BTRFS_ATTR_RW(_name, _mode, _show, NULL) | |
23 | #define BTRFS_ATTR_PTR(_name) (&btrfs_attr_##_name.attr) | |
24 | ||
079b72bc JM |
25 | struct btrfs_feature_attr { |
26 | struct kobj_attribute kobj_attr; | |
27 | enum btrfs_feature_set feature_set; | |
28 | u64 feature_bit; | |
29 | }; | |
30 | ||
31 | #define BTRFS_FEAT_ATTR(_name, _feature_set, _prefix, _feature_bit) \ | |
32 | static struct btrfs_feature_attr btrfs_attr_##_name = { \ | |
33 | .kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \ | |
ba631941 JM |
34 | btrfs_feature_attr_show, \ |
35 | btrfs_feature_attr_store), \ | |
079b72bc JM |
36 | .feature_set = _feature_set, \ |
37 | .feature_bit = _prefix ##_## _feature_bit, \ | |
38 | } | |
39 | #define BTRFS_FEAT_ATTR_PTR(_name) (&btrfs_attr_##_name.kobj_attr.attr) | |
40 | ||
41 | #define BTRFS_FEAT_ATTR_COMPAT(name, feature) \ | |
42 | BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature) | |
43 | #define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \ | |
44 | BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT, feature) | |
45 | #define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \ | |
46 | BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature) | |
47 | ||
48 | /* convert from attribute */ | |
49 | #define to_btrfs_feature_attr(a) \ | |
50 | container_of(a, struct btrfs_feature_attr, kobj_attr) | |
5ac1d209 JM |
51 | #define attr_to_btrfs_attr(a) container_of(a, struct kobj_attribute, attr) |
52 | #define attr_to_btrfs_feature_attr(a) \ | |
53 | to_btrfs_feature_attr(attr_to_btrfs_attr(a)) | |
079b72bc | 54 | #endif /* _BTRFS_SYSFS_H_ */ |