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 */ 8 extern u64 btrfs_debugfs_test; 9 10 enum 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 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, _feature_prefix, _feature_bit) \ 43 static 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 */ 61 static inline struct btrfs_feature_attr * 62 to_btrfs_feature_attr(struct kobj_attribute *a) 63 { 64 return container_of(a, struct btrfs_feature_attr, kobj_attr); 65 } 66 67 static inline struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr) 68 { 69 return container_of(attr, struct kobj_attribute, attr); 70 } 71 72 static inline struct btrfs_feature_attr * 73 attr_to_btrfs_feature_attr(struct attribute *attr) 74 { 75 return to_btrfs_feature_attr(attr_to_btrfs_attr(attr)); 76 } 77 78 char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags); 79 extern const char * const btrfs_feature_set_names[3]; 80 extern struct kobj_type space_info_ktype; 81 extern struct kobj_type btrfs_raid_ktype; 82 int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices, 83 struct btrfs_device *one_device); 84 int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices, 85 struct btrfs_device *one_device); 86 int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs, 87 struct kobject *parent); 88 int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs); 89 void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs); 90 void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info, 91 u64 bit, enum btrfs_feature_set set); 92 93 #endif /* _BTRFS_SYSFS_H_ */ 94