Merge branch 'header-move' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemo...

[linux-2.6] / drivers / mtd / ubi / vtbl.c

diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c
index d9af11a8682ba3dce1b250307b2e7c33bff387c8..217d0e111b2a4652212f563cb9baf5255f2bbdca 100644 (file)
--- a/drivers/mtd/ubi/vtbl.c
+++ b/drivers/mtd/ubi/vtbl.c
@@ -115,8 +115,58 @@ int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
 }
 
 /**
- * vtbl_check - check if volume table is not corrupted and contains sensible
- *              data.
+ * ubi_vtbl_rename_volumes - rename UBI volumes in the volume table.
+ * @ubi: UBI device description object
+ * @rename_list: list of &struct ubi_rename_entry objects
+ *
+ * This function re-names multiple volumes specified in @req in the volume
+ * table. Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+int ubi_vtbl_rename_volumes(struct ubi_device *ubi,
+                           struct list_head *rename_list)
+{
+       int i, err;
+       struct ubi_rename_entry *re;
+       struct ubi_volume *layout_vol;
+
+       list_for_each_entry(re, rename_list, list) {
+               uint32_t crc;
+               struct ubi_volume *vol = re->desc->vol;
+               struct ubi_vtbl_record *vtbl_rec = &ubi->vtbl[vol->vol_id];
+
+               if (re->remove) {
+                       memcpy(vtbl_rec, &empty_vtbl_record,
+                              sizeof(struct ubi_vtbl_record));
+                       continue;
+               }
+
+               vtbl_rec->name_len = cpu_to_be16(re->new_name_len);
+               memcpy(vtbl_rec->name, re->new_name, re->new_name_len);
+               memset(vtbl_rec->name + re->new_name_len, 0,
+                      UBI_VOL_NAME_MAX + 1 - re->new_name_len);
+               crc = crc32(UBI_CRC32_INIT, vtbl_rec,
+                           UBI_VTBL_RECORD_SIZE_CRC);
+               vtbl_rec->crc = cpu_to_be32(crc);
+       }
+
+       layout_vol = ubi->volumes[vol_id2idx(ubi, UBI_LAYOUT_VOLUME_ID)];
+       for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
+               err = ubi_eba_unmap_leb(ubi, layout_vol, i);
+               if (err)
+                       return err;
+
+               err = ubi_eba_write_leb(ubi, layout_vol, i, ubi->vtbl, 0,
+                                       ubi->vtbl_size, UBI_LONGTERM);
+               if (err)
+                       return err;
+       }
+
+       return 0;
+}
+
+/**
+ * vtbl_check - check if volume table is not corrupted and sensible.
  * @ubi: UBI device description object
  * @vtbl: volume table
  *
@@ -288,7 +338,6 @@ retry:
                             vid_hdr->data_pad = cpu_to_be32(0);
        vid_hdr->lnum = cpu_to_be32(copy);
        vid_hdr->sqnum = cpu_to_be64(++si->max_sqnum);
-       vid_hdr->leb_ver = cpu_to_be32(old_seb ? old_seb->leb_ver + 1: 0);
 
        /* The EC header is already there, write the VID header */
        err = ubi_io_write_vid_hdr(ubi, new_seb->pnum, vid_hdr);
@@ -371,7 +420,7 @@ static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi,
         *    to LEB 0.
         */
 
-       dbg_msg("check layout volume");
+       dbg_gen("check layout volume");
 
        /* Read both LEB 0 and LEB 1 into memory */
        ubi_rb_for_each_entry(rb, seb, &sv->root, u.rb) {
@@ -410,7 +459,8 @@ static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi,
        if (!leb_corrupted[0]) {
                /* LEB 0 is OK */
                if (leb[1])
-                       leb_corrupted[1] = memcmp(leb[0], leb[1], ubi->vtbl_size);
+                       leb_corrupted[1] = memcmp(leb[0], leb[1],
+                                                 ubi->vtbl_size);
                if (leb_corrupted[1]) {
                        ubi_warn("volume table copy #2 is corrupted");
                        err = create_vtbl(ubi, si, 1, leb[0]);
@@ -728,8 +778,7 @@ static int check_scanning_info(const struct ubi_device *ubi,
 }
 
 /**
- * ubi_read_volume_table - read volume table.
- * information.
+ * ubi_read_volume_table - read the volume table.
  * @ubi: UBI device description object
  * @si: scanning information
  *
@@ -808,11 +857,10 @@ int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_scan_info *si)
 
 out_free:
        vfree(ubi->vtbl);
-       for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++)
-               if (ubi->volumes[i]) {
-                       kfree(ubi->volumes[i]);
-                       ubi->volumes[i] = NULL;
-               }
+       for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
+               kfree(ubi->volumes[i]);
+               ubi->volumes[i] = NULL;
+       }
        return err;
 }