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The files under /sys/fs/UUID/features get out of sync with the actual incompat bits set for the filesystem if they change after mount. We're going to sync them and need a helper to do that. Signed-off-by: David Sterba <dsterba@suse.com>
96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
#ifndef _BTRFS_SYSFS_H_
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#define _BTRFS_SYSFS_H_
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/*
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* Data exported through sysfs
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*/
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extern u64 btrfs_debugfs_test;
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enum btrfs_feature_set {
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FEAT_COMPAT,
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FEAT_COMPAT_RO,
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FEAT_INCOMPAT,
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FEAT_MAX
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};
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#define __INIT_KOBJ_ATTR(_name, _mode, _show, _store) \
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{ \
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.attr = { .name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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}
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#define BTRFS_ATTR_RW(_name, _show, _store) \
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static struct kobj_attribute btrfs_attr_##_name = \
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__INIT_KOBJ_ATTR(_name, 0644, _show, _store)
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#define BTRFS_ATTR(_name, _show) \
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static struct kobj_attribute btrfs_attr_##_name = \
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__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
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#define BTRFS_ATTR_PTR(_name) (&btrfs_attr_##_name.attr)
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#define BTRFS_RAID_ATTR(_name, _show) \
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static struct kobj_attribute btrfs_raid_attr_##_name = \
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__INIT_KOBJ_ATTR(_name, 0444, _show, NULL)
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#define BTRFS_RAID_ATTR_PTR(_name) (&btrfs_raid_attr_##_name.attr)
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struct btrfs_feature_attr {
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struct kobj_attribute kobj_attr;
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enum btrfs_feature_set feature_set;
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u64 feature_bit;
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};
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#define BTRFS_FEAT_ATTR(_name, _feature_set, _prefix, _feature_bit) \
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static struct btrfs_feature_attr btrfs_attr_##_name = { \
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.kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \
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btrfs_feature_attr_show, \
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btrfs_feature_attr_store), \
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.feature_set = _feature_set, \
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.feature_bit = _prefix ##_## _feature_bit, \
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}
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#define BTRFS_FEAT_ATTR_PTR(_name) (&btrfs_attr_##_name.kobj_attr.attr)
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#define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
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BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
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#define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
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BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature)
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#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
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BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
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/* convert from attribute */
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static inline struct btrfs_feature_attr *
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to_btrfs_feature_attr(struct kobj_attribute *a)
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{
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return container_of(a, struct btrfs_feature_attr, kobj_attr);
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}
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static inline struct kobj_attribute *attr_to_btrfs_attr(struct attribute *attr)
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{
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return container_of(attr, struct kobj_attribute, attr);
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}
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static inline struct btrfs_feature_attr *
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attr_to_btrfs_feature_attr(struct attribute *attr)
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{
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return to_btrfs_feature_attr(attr_to_btrfs_attr(attr));
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}
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char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
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extern const char * const btrfs_feature_set_names[3];
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extern struct kobj_type space_info_ktype;
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extern struct kobj_type btrfs_raid_ktype;
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int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
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struct btrfs_device *one_device);
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int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
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struct btrfs_device *one_device);
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int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
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struct kobject *parent);
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int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
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void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
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void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
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u64 bit, enum btrfs_feature_set set);
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#endif /* _BTRFS_SYSFS_H_ */
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