@@ -1522,6 +1522,7 @@ struct btrfs_fs_info {
struct kobject super_kobj;
struct kobject *space_info_kobj;
+ struct kobject *device_dir_kobj;
struct completion kobj_unregister;
int do_barriers;
int closing;
@@ -23,11 +23,13 @@
#include <linux/buffer_head.h>
#include <linux/kobject.h>
#include <linux/bug.h>
+#include <linux/genhd.h>
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
#include "sysfs.h"
+#include "volumes.h"
static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj);
@@ -374,6 +376,8 @@ static inline struct btrfs_fs_info *to_f
void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info)
{
sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs);
+ kobject_del(fs_info->device_dir_kobj);
+ kobject_put(fs_info->device_dir_kobj);
kobject_del(fs_info->space_info_kobj);
kobject_put(fs_info->space_info_kobj);
kobject_del(&fs_info->super_kobj);
@@ -507,6 +511,30 @@ static int add_unknown_feature_attrs(str
return 0;
}
+static int add_device_membership(struct btrfs_fs_info *fs_info)
+{
+ int error = 0;
+ struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
+ struct btrfs_device *dev;
+
+ fs_info->device_dir_kobj = kobject_create_and_add("devices",
+ &fs_info->super_kobj);
+ if (!fs_info->device_dir_kobj)
+ return -ENOMEM;
+
+ list_for_each_entry(dev, &fs_devices->devices, dev_list) {
+ struct hd_struct *disk = dev->bdev->bd_part;
+ struct kobject *disk_kobj = &part_to_dev(disk)->kobj;
+
+ error = sysfs_create_link(fs_info->device_dir_kobj,
+ disk_kobj, disk_kobj->name);
+ if (error)
+ break;
+ }
+
+ return error;
+}
+
/* /sys/fs/btrfs/ entry */
static struct kset *btrfs_kset;
@@ -528,6 +556,10 @@ int btrfs_sysfs_add_one(struct btrfs_fs_
if (error)
goto failure;
+ error = add_device_membership(fs_info);
+ if (error)
+ goto failure;
+
fs_info->space_info_kobj = kobject_create_and_add("allocation",
&fs_info->super_kobj);
if (!fs_info->space_info_kobj) {
Now that we have the infrastructure for per-super attributes, we can publish device membership in /sys/fs/btrfs/<fsid>/devices. The information is published as symlinks to the block devices. Signed-off-by: Jeff Mahoney <jeffm@suse.com> --- fs/btrfs/ctree.h | 1 + fs/btrfs/sysfs.c | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 33 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html