Merge branch 'ubi'

1 files changed, 73 insertions, 0 deletions

diff --git a/ubi-utils/src/eb_chain.h b/ubi-utils/src/eb_chain.h
new file mode 100644
index 0000000..f640c54
--- /dev/null
+++ b/ubi-utils/src/eb_chain.h
@@ -0,0 +1,73 @@
+#ifndef __EB_CHAIN_H__
+#define __EB_CHAIN_H__
+
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * Author:  Drake Dowsett
+ * Contact: Andreas Arnez (arnez@de.ibm.com)
+ *
+ * Eraseblock Chain
+ *
+ * A linked list structure to order eraseblocks by volume and logical number
+ * and to update by version number. Doesn't contain actual eraseblock data
+ * but rather the erasecounter and volume id headers as well as a position
+ * indicator.
+ *
+ * Diagram Example:
+ *
+ * [V1.0v0]->[V1.1v2]->[V1.2v1]->[V2.0v2]->[V2.1v0]->[V2.2v1]->NULL
+ *     |         |         |         |         |         |
+ *   NULL    [V1.1v1]  [V1.2v0]  [V2.0v1]    NULL    [V2.2v0]
+ *               |         |         |                   |
+ *           [V1.1v0]    NULL    [V2.0v0]              NULL
+ *               |                   |
+ *             NULL                NULL
+ *
+ * [VA.BvC] represents the eb_info for the eraseblock with the vol_id A,
+ * lnum B and leb_ver C
+ * -> represents the `next' pointer
+ * | represents the `older' pointer
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <mtd/ubi-header.h>
+
+typedef struct eb_info *eb_info_t;
+struct eb_info {
+	struct ubi_ec_hdr outer;
+	struct ubi_vid_hdr inner;
+	fpos_t eb_top;
+	uint32_t linear;
+
+	eb_info_t next;
+	eb_info_t older;
+};
+
+int eb_chain_insert(eb_info_t *head, eb_info_t item);
+
+int eb_chain_position(eb_info_t *head, uint32_t vol_id, uint32_t *lnum,
+		      eb_info_t *pos);
+
+int eb_chain_print(FILE *stream, eb_info_t *head);
+
+int eb_chain_destroy(eb_info_t *head);
+
+#endif /* __EB_CHAIN_H__ */