@@ -355,6 +355,10 @@ static ssize_t supported_checksums_show(struct kobject *kobj,
#endif
+static const struct attribute *btrfs_readmirror_attrs[] = {
+ NULL,
+};
+
static ssize_t btrfs_show_u64(u64 *value_ptr, spinlock_t *lock, char *buf)
{
u64 val;
@@ -772,6 +776,13 @@ void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info)
{
btrfs_reset_fs_info_ptr(fs_info);
+ if (fs_info->fs_devices->readmirror_kobj) {
+ sysfs_remove_files(fs_info->fs_devices->readmirror_kobj,
+ btrfs_readmirror_attrs);
+ kobject_del(fs_info->fs_devices->readmirror_kobj);
+ kobject_put(fs_info->fs_devices->readmirror_kobj);
+ }
+
if (fs_info->space_info_kobj) {
sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs);
kobject_del(fs_info->space_info_kobj);
@@ -1224,6 +1235,17 @@ int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info)
if (error)
goto failure;
+ fs_devs->readmirror_kobj = kobject_create_and_add("readmirror",
+ &fs_devs->fsid_kobj);
+ if (!fs_devs->readmirror_kobj) {
+ error = -ENOMEM;
+ goto failure;
+ }
+ error = sysfs_create_files(fs_info->readmirror_kobj,
+ btrfs_readmirror_attrs);
+ if (error)
+ goto failure;
+
return 0;
failure:
btrfs_sysfs_remove_mounted(fs_info);
@@ -268,6 +268,7 @@ struct btrfs_fs_devices {
struct completion kobj_unregister;
atomic_t readmirror;
+ struct kobject *readmirror_kobj;
};
#define BTRFS_BIO_INLINE_CSUM_SIZE 64
Add /sys/fs/btrfs/UUID/readmirror kobject so that we can be the readmirror policies as attributes under it. Signed-off-by: Anand Jain <anand.jain@oracle.com> --- fs/btrfs/sysfs.c | 22 ++++++++++++++++++++++ fs/btrfs/volumes.h | 1 + 2 files changed, 23 insertions(+)