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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-07-13 21:47:47 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-07-24 13:34:46 +0300
commitf40ac9cdf6991287f19bdafe9b0752ee40137908 (patch)
treea49120d5be3729feaa40880962f29e3679c1800e /drivers/mtd/ubi/vtbl.c
parentc8566350a3229ca505b84313c65d1403b4d0cbfc (diff)
UBI: implement multiple volumes rename
Quite useful ioctl which allows to make atomic system upgrades. The idea belongs to Richard Titmuss <richard_titmuss@logitech.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers/mtd/ubi/vtbl.c')
-rw-r--r--drivers/mtd/ubi/vtbl.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c
index 05fb72fd268..23c5376234b 100644
--- a/drivers/mtd/ubi/vtbl.c
+++ b/drivers/mtd/ubi/vtbl.c
@@ -115,6 +115,57 @@ int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
}
/**
+ * ubi_vtbl_rename_volumes - rename UBI volumes in the volume table.
+ * @ubi: UBI device description object
+ * @renam_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 contains sensible
* data.
* @ubi: UBI device description object