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TOMOYO Linux Cross Reference
Linux/fs/btrfs/sysfs.h

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  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 *
 65 to_btrfs_feature_attr(struct kobj_attribute *a)
 66 {
 67         return container_of(a, struct btrfs_feature_attr, kobj_attr);
 68 }
 69 
 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 *
 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_kobj_add_device(struct btrfs_fs_devices *fs_devices,
 86                 struct btrfs_device *one_device);
 87 int btrfs_kobj_rm_device(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 

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