Btrfs only allowed attributes to be exposed in debug/. Let's let other
groups be created by making debug its own kobject.
This also makes the per-fs debug options separate from the global
features mount attributes. This seems to be needed as
sysfs_create_files() requires const struct attribute * while
sysfs_create_group() can take struct attribute *. This seems nicer as
per file system, you'll probably use to_fs_info().
Signed-off-by: Dennis Zhou <dennis@xxxxxxxxxx>
Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
---
fs/btrfs/ctree.h | 4 ++++
fs/btrfs/sysfs.c | 20 ++++++++++++++++----
2 files changed, 20 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 68340d65a8b6..0c5cd5e6c2c5 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -927,6 +927,10 @@ struct btrfs_fs_info {
spinlock_t ref_verify_lock;
struct rb_root block_tree;
#endif
+
+#ifdef CONFIG_BTRFS_DEBUG
+ struct kobject *debug_kobj;
+#endif
};
static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 58d089354bc1..beae5c8146fb 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -344,6 +344,10 @@ static const struct attribute_group btrfs_static_feature_attr_group = {
* /sys/fs/btrfs/debug - applies to module or all filesystems
* /sys/fs/btrfs/UUID - applies only to the given filesystem
*/
+static const struct attribute *btrfs_debug_mount_attrs[] = {
+ NULL,
+};
+
static struct attribute *btrfs_debug_feature_attrs[] = {
NULL
};
@@ -772,8 +776,12 @@ void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info)
kobject_put(fs_info->space_info_kobj);
}
#ifdef CONFIG_BTRFS_DEBUG
- sysfs_remove_group(&fs_info->fs_devices->fsid_kobj,
- &btrfs_debug_feature_attr_group);
+ if (fs_info->debug_kobj) {
+ sysfs_remove_files(fs_info->debug_kobj,
+ btrfs_debug_mount_attrs);
+ kobject_del(fs_info->debug_kobj);
+ kobject_put(fs_info->debug_kobj);
+ }
#endif
addrm_unknown_feature_attrs(fs_info, false);
sysfs_remove_group(&fs_info->fs_devices->fsid_kobj, &btrfs_feature_attr_group);
@@ -1115,8 +1123,12 @@ int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info)
goto failure;
#ifdef CONFIG_BTRFS_DEBUG
- error = sysfs_create_group(fsid_kobj,
- &btrfs_debug_feature_attr_group);
+ fs_info->debug_kobj = kobject_create_and_add("debug", fsid_kobj);
+ if (!fs_info->debug_kobj)
+ goto failure;
+
+ error = sysfs_create_files(fs_info->debug_kobj,
+ btrfs_debug_mount_attrs);
if (error)
goto failure;
#endif
--
2.17.1
