1 #ifndef _BTRFS_SYSFS_H_ 2 #define _BTRFS_SYSFS_H_ 3 4 /* 5 * Data exported through sysfs 6 */ 7 extern u64 btrfs_debugfs_test; 8 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 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 40 struct 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) \ 47 static 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, 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 */ 64 static inline struct btrfs_feature_attr * to_btrfs_feature_attr(struct kobj_attribute * a)65 to_btrfs_feature_attr(struct kobj_attribute *a) 66 { 67 return container_of(a, struct btrfs_feature_attr, kobj_attr); 68 } 69 attr_to_btrfs_attr(struct attribute * attr)70 static inline struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr) 71 { 72 return container_of(attr, struct kobj_attribute, attr); 73 } 74 75 static inline struct btrfs_feature_attr * attr_to_btrfs_feature_attr(struct attribute * attr)76 attr_to_btrfs_feature_attr(struct attribute *attr) 77 { 78 return to_btrfs_feature_attr(attr_to_btrfs_attr(attr)); 79 } 80 81 char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags); 82 extern const char * const btrfs_feature_set_names[3]; 83 extern struct kobj_type space_info_ktype; 84 extern struct kobj_type btrfs_raid_ktype; 85 int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices, 86 struct btrfs_device *one_device); 87 int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices, 88 struct btrfs_device *one_device); 89 int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs, 90 struct kobject *parent); 91 int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs); 92 void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs); 93 #endif /* _BTRFS_SYSFS_H_ */ 94