diff options
author | Jeff Mahoney <jeffm@suse.com> | 2013-11-01 13:06:58 -0400 |
---|---|---|
committer | Chris Mason <clm@fb.com> | 2014-01-28 13:19:25 -0800 |
commit | 5ac1d209f11271fbfad0fa31ba56ec64c142d9ea (patch) | |
tree | 15f67ec6c85caa87b3358df2876f51becdf04b49 /fs/btrfs/sysfs.c | |
parent | 079b72bca30dbc74c86c7c7825b8c34eb86ce3ee (diff) | |
download | linux-5ac1d209f11271fbfad0fa31ba56ec64c142d9ea.tar.gz |
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 <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/sysfs.c')
-rw-r--r-- | fs/btrfs/sysfs.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 9e217b581903..79be4a187af9 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -28,6 +28,25 @@ #include "transaction.h" #include "sysfs.h" +static void btrfs_release_super_kobj(struct kobject *kobj); +static struct kobj_type btrfs_ktype = { + .sysfs_ops = &kobj_sysfs_ops, + .release = btrfs_release_super_kobj, +}; + +static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj) +{ + if (kobj->ktype != &btrfs_ktype) + return NULL; + return container_of(kobj, struct btrfs_fs_info, super_kobj); +} + +static void btrfs_release_super_kobj(struct kobject *kobj) +{ + struct btrfs_fs_info *fs_info = to_fs_info(kobj); + complete(&fs_info->kobj_unregister); +} + static ssize_t btrfs_feature_attr_show(struct kobject *kobj, struct kobj_attribute *a, char *buf) { @@ -65,6 +84,23 @@ static const struct attribute_group btrfs_feature_attr_group = { /* /sys/fs/btrfs/ entry */ static struct kset *btrfs_kset; +void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info) +{ + kobject_del(&fs_info->super_kobj); + kobject_put(&fs_info->super_kobj); + wait_for_completion(&fs_info->kobj_unregister); +} + +int btrfs_sysfs_add_one(struct btrfs_fs_info *fs_info) +{ + int error; + + init_completion(&fs_info->kobj_unregister); + error = kobject_init_and_add(&fs_info->super_kobj, &btrfs_ktype, NULL, + "%pU", fs_info->fsid); + return error; +} + int btrfs_init_sysfs(void) { int ret; |