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 */ 9 extern u64 btrfs_debugfs_test; 10 11 enum 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 37 struct 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) \ 44 static 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 */ 62 static inline struct btrfs_feature_attr * 63 to_btrfs_feature_attr(struct kobj_attribute *a) 64 { 65 return container_of(a, struct btrfs_feature_attr, kobj_attr); 66 } 67 68 static inline struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr) 69 { 70 return container_of(attr, struct kobj_attribute, attr); 71 } 72 73 static inline struct btrfs_feature_attr * 74 attr_to_btrfs_feature_attr(struct attribute *attr) 75 { 76 return to_btrfs_feature_attr(attr_to_btrfs_attr(attr)); 77 } 78 79 char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags); 80 extern const char * const btrfs_feature_set_names[FEAT_MAX]; 81 extern struct kobj_type space_info_ktype; 82 extern struct kobj_type btrfs_raid_ktype; 83 int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices, 84 struct btrfs_device *one_device); 85 int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices, 86 struct btrfs_device *one_device); 87 int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs, 88 struct kobject *parent); 89 int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs); 90 void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs); 91 void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info, 92 u64 bit, enum btrfs_feature_set set); 93 94 #endif 95