From 5ac1d209f11271fbfad0fa31ba56ec64c142d9ea Mon Sep 17 00:00:00 2001 From: Jeff Mahoney Date: Fri, 1 Nov 2013 13:06:58 -0400 Subject: btrfs: publish per-super attributes in sysfs 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 Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/sysfs.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'fs/btrfs/sysfs.h') diff --git a/fs/btrfs/sysfs.h b/fs/btrfs/sysfs.h index 863e031ed1c1..d7c61bdf04ba 100644 --- a/fs/btrfs/sysfs.h +++ b/fs/btrfs/sysfs.h @@ -15,6 +15,13 @@ enum btrfs_feature_set { .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; @@ -40,4 +47,7 @@ static struct btrfs_feature_attr btrfs_attr_##_name = { \ /* 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_ */ -- cgit v1.2.3