UBI: implement multiple volumes rename

[safe/jmp/linux-2.6] / drivers / mtd / ubi / vmt.c

diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index 2cd886a..4be4014 100644 (file)
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -402,13 +402,14 @@ out_unlock:
 /**
  * ubi_remove_volume - remove volume.
  * @desc: volume descriptor
+ * @no_vtbl: do not change volume table if not zero
  *
  * This function removes volume described by @desc. The volume has to be opened
  * in "exclusive" mode. Returns zero in case of success and a negative error
  * code in case of failure. The caller has to have the @ubi->volumes_mutex
  * locked.
  */
-int ubi_remove_volume(struct ubi_volume_desc *desc)
+int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl)
 {
        struct ubi_volume *vol = desc->vol;
        struct ubi_device *ubi = vol->ubi;
@@ -437,9 +438,11 @@ int ubi_remove_volume(struct ubi_volume_desc *desc)
        if (err)
                goto out_err;
 
-       err = ubi_change_vtbl_record(ubi, vol_id, NULL);
-       if (err)
-               goto out_err;
+       if (!no_vtbl) {
+               err = ubi_change_vtbl_record(ubi, vol_id, NULL);
+               if (err)
+                       goto out_err;
+       }
 
        for (i = 0; i < vol->reserved_pebs; i++) {
                err = ubi_eba_unmap_leb(ubi, vol, i);
@@ -465,7 +468,8 @@ int ubi_remove_volume(struct ubi_volume_desc *desc)
        ubi->vol_count -= 1;
        spin_unlock(&ubi->volumes_lock);
 
-       err = paranoid_check_volumes(ubi);
+       if (!no_vtbl)
+               err = paranoid_check_volumes(ubi);
        return err;
 
 out_err:
@@ -602,6 +606,44 @@ out_free:
 }
 
 /**
+ * ubi_rename_volumes - re-name UBI volumes.
+ * @ubi: UBI device description object
+ * @renam_list: list of &struct ubi_rename_entry objects
+ *
+ * This function re-names or removes volumes specified in the re-name list.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+int ubi_rename_volumes(struct ubi_device *ubi, struct list_head *rename_list)
+{
+       int err;
+       struct ubi_rename_entry *re;
+
+       err = ubi_vtbl_rename_volumes(ubi, rename_list);
+       if (err)
+               return err;
+
+       list_for_each_entry(re, rename_list, list) {
+               if (re->remove) {
+                       err = ubi_remove_volume(re->desc, 1);
+                       if (err)
+                               break;
+               } else {
+                       struct ubi_volume *vol = re->desc->vol;
+
+                       spin_lock(&ubi->volumes_lock);
+                       vol->name_len = re->new_name_len;
+                       memcpy(vol->name, re->new_name, re->new_name_len + 1);
+                       spin_unlock(&ubi->volumes_lock);
+               }
+       }
+
+       if (!err)
+               paranoid_check_volumes(ubi);
+       return err;
+}
+
+/**
  * ubi_add_volume - add volume.
  * @ubi: UBI device description object
  * @vol: volume description object
@@ -826,10 +868,9 @@ static int paranoid_check_volume(struct ubi_device *ubi, int vol_id)
 
 fail:
        ubi_err("paranoid check failed for volume %d", vol_id);
-       if (vol) {
+       if (vol)
                ubi_dbg_dump_vol_info(vol);
-               ubi_dbg_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
-       }
+       ubi_dbg_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
        spin_unlock(&ubi->volumes_lock);
        return -EINVAL;
 }