Btrfs: sysfs: add pointer to access fs_info from fs_devices
adds fs_info pointer with struct btrfs_fs_devices.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index f045c56..4b9a8df 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -530,6 +530,8 @@
void btrfs_sysfs_remove_one(struct btrfs_fs_info *fs_info)
{
+ btrfs_reset_fs_info_ptr(fs_info);
+
if (fs_info->space_info_kobj) {
sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs);
kobject_del(fs_info->space_info_kobj);
@@ -729,6 +731,8 @@
struct btrfs_fs_devices *fs_devs = fs_info->fs_devices;
struct kobject *super_kobj = &fs_devs->super_kobj;
+ btrfs_set_fs_info_ptr(fs_info);
+
error = btrfs_sysfs_add_fsid(fs_devs, NULL);
if (error)
return error;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e500bfa..5719470 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6733,3 +6733,21 @@
}
unlock_chunks(root);
}
+
+void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
+ while (fs_devices) {
+ fs_devices->fs_info = fs_info;
+ fs_devices = fs_devices->seed;
+ }
+}
+
+void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
+ while (fs_devices) {
+ fs_devices->fs_info = NULL;
+ fs_devices = fs_devices->seed;
+ }
+}
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index ac7e938..210a643 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -254,6 +254,7 @@
*/
int rotating;
+ struct btrfs_fs_info *fs_info;
/* sysfs kobjects */
struct kobject super_kobj;
struct kobject *device_dir_kobj;
@@ -543,5 +544,7 @@
}
struct list_head *btrfs_get_fs_uuids(void);
+void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);
+void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info);
#endif