forked from Minki/linux
5ac1d209f1
This patch adds per-super attributes to sysfs. It doesn't publish any attributes yet, but does the proper lifetime handling as well as the basic infrastructure to add new attributes. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <clm@fb.com>
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
#ifndef _BTRFS_SYSFS_H_
|
|
#define _BTRFS_SYSFS_H_
|
|
|
|
enum btrfs_feature_set {
|
|
FEAT_COMPAT,
|
|
FEAT_COMPAT_RO,
|
|
FEAT_INCOMPAT,
|
|
FEAT_MAX
|
|
};
|
|
|
|
#define __INIT_KOBJ_ATTR(_name, _mode, _show, _store) \
|
|
{ \
|
|
.attr = { .name = __stringify(_name), .mode = _mode }, \
|
|
.show = _show, \
|
|
.store = _store, \
|
|
}
|
|
|
|
#define BTRFS_ATTR_RW(_name, _mode, _show, _store) \
|
|
static struct kobj_attribute btrfs_attr_##_name = \
|
|
__INIT_KOBJ_ATTR(_name, _mode, _show, _store)
|
|
#define BTRFS_ATTR(_name, _mode, _show) \
|
|
BTRFS_ATTR_RW(_name, _mode, _show, NULL)
|
|
#define BTRFS_ATTR_PTR(_name) (&btrfs_attr_##_name.attr)
|
|
|
|
struct btrfs_feature_attr {
|
|
struct kobj_attribute kobj_attr;
|
|
enum btrfs_feature_set feature_set;
|
|
u64 feature_bit;
|
|
};
|
|
|
|
#define BTRFS_FEAT_ATTR(_name, _feature_set, _prefix, _feature_bit) \
|
|
static struct btrfs_feature_attr btrfs_attr_##_name = { \
|
|
.kobj_attr = __INIT_KOBJ_ATTR(_name, S_IRUGO, \
|
|
btrfs_feature_attr_show, NULL), \
|
|
.feature_set = _feature_set, \
|
|
.feature_bit = _prefix ##_## _feature_bit, \
|
|
}
|
|
#define BTRFS_FEAT_ATTR_PTR(_name) (&btrfs_attr_##_name.kobj_attr.attr)
|
|
|
|
#define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
|
|
BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
|
|
#define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
|
|
BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT, feature)
|
|
#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
|
|
BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
|
|
|
|
/* convert from attribute */
|
|
#define to_btrfs_feature_attr(a) \
|
|
container_of(a, struct btrfs_feature_attr, kobj_attr)
|
|
#define attr_to_btrfs_attr(a) container_of(a, struct kobj_attribute, attr)
|
|
#define attr_to_btrfs_feature_attr(a) \
|
|
to_btrfs_feature_attr(attr_to_btrfs_attr(a))
|
|
#endif /* _BTRFS_SYSFS_H_ */
|