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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Jeff Mahoney079b72b2013-11-01 13:06:57 -04002#ifndef _BTRFS_SYSFS_H_
3#define _BTRFS_SYSFS_H_
4
David Sterba1bae3092014-02-05 15:36:18 +01005/*
6 * Data exported through sysfs
7 */
8extern u64 btrfs_debugfs_test;
9
Jeff Mahoney079b72b2013-11-01 13:06:57 -040010enum 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
Hans van Kranenburga969f4c2017-10-08 22:30:58 +020024#define BTRFS_ATTR_RW(_prefix, _name, _show, _store) \
25 static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \
Anand Jain20ee0822014-07-30 20:04:09 +080026 __INIT_KOBJ_ATTR(_name, 0644, _show, _store)
Anand Jain98b3d382014-07-30 20:04:08 +080027
Hans van Kranenburga969f4c2017-10-08 22:30:58 +020028#define BTRFS_ATTR(_prefix, _name, _show) \
29 static struct kobj_attribute btrfs_attr_##_prefix##_##_name = \
Anand Jain20ee0822014-07-30 20:04:09 +080030 __INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
Anand Jain98b3d382014-07-30 20:04:08 +080031
Hans van Kranenburga969f4c2017-10-08 22:30:58 +020032#define BTRFS_ATTR_PTR(_prefix, _name) \
33 (&btrfs_attr_##_prefix##_##_name.attr)
Jeff Mahoney6ab0a202013-11-01 13:07:04 -040034
35
Jeff Mahoney079b72b2013-11-01 13:06:57 -040036struct btrfs_feature_attr {
37 struct kobj_attribute kobj_attr;
38 enum btrfs_feature_set feature_set;
39 u64 feature_bit;
40};
41
Hans van Kranenburga969f4c2017-10-08 22:30:58 +020042#define BTRFS_FEAT_ATTR(_name, _feature_set, _feature_prefix, _feature_bit) \
43static struct btrfs_feature_attr btrfs_attr_features_##_name = { \
Jeff Mahoney079b72b2013-11-01 13:06:57 -040044 .kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \
Jeff Mahoneyba631942013-11-01 13:07:01 -040045 btrfs_feature_attr_show, \
46 btrfs_feature_attr_store), \
Jeff Mahoney079b72b2013-11-01 13:06:57 -040047 .feature_set = _feature_set, \
Hans van Kranenburga969f4c2017-10-08 22:30:58 +020048 .feature_bit = _feature_prefix ##_## _feature_bit, \
Jeff Mahoney079b72b2013-11-01 13:06:57 -040049}
Hans van Kranenburga969f4c2017-10-08 22:30:58 +020050#define BTRFS_FEAT_ATTR_PTR(_name) \
51 (&btrfs_attr_features_##_name.kobj_attr.attr)
Jeff Mahoney079b72b2013-11-01 13:06:57 -040052
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) \
David Sterbaba2d0842016-01-20 19:07:04 +010056 BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature)
Jeff Mahoney079b72b2013-11-01 13:06:57 -040057#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
58 BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
59
60/* convert from attribute */
David Sterba093adbc2015-02-24 19:40:41 +010061static inline struct btrfs_feature_attr *
62to_btrfs_feature_attr(struct kobj_attribute *a)
63{
64 return container_of(a, struct btrfs_feature_attr, kobj_attr);
65}
66
67static inline struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr)
68{
69 return container_of(attr, struct kobj_attribute, attr);
70}
71
72static inline struct btrfs_feature_attr *
73attr_to_btrfs_feature_attr(struct attribute *attr)
74{
75 return to_btrfs_feature_attr(attr_to_btrfs_attr(attr));
76}
77
Jeff Mahoney3b02a682013-11-01 13:07:02 -040078char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
79extern const char * const btrfs_feature_set_names[3];
Jeff Mahoney6ab0a202013-11-01 13:07:04 -040080extern struct kobj_type space_info_ktype;
81extern struct kobj_type btrfs_raid_ktype;
Anand Jaine3bd6972015-08-14 18:32:48 +080082int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
Anand Jain0d393762014-06-03 11:36:01 +080083 struct btrfs_device *one_device);
Anand Jain32576042015-08-14 18:32:49 +080084int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
Anand Jain99994cd2014-06-03 11:36:00 +080085 struct btrfs_device *one_device);
Anand Jain0c10e2d2015-03-10 06:38:35 +080086int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
87 struct kobject *parent);
Anand Jainef1a0da2015-03-10 06:38:36 +080088int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
Anand Jain1d1c1be2015-03-10 06:38:37 +080089void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
David Sterba444e7512016-01-21 18:50:40 +010090void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
91 u64 bit, enum btrfs_feature_set set);
92
Jeff Mahoney079b72b2013-11-01 13:06:57 -040093#endif /* _BTRFS_SYSFS_H_ */