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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2007-05-04 21:00:46 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2007-05-04 21:00:46 +0300
commit80cecea79cf13075d136e73067aa40439539bb0f (patch)
treef28acc5b3a124c3a7355f77ccdbad48753f55872 /ubi-utils/src/eb_chain.h
parent726ac243f051f0daee6149db66ac21ba621fb454 (diff)
parent22f90673165489fd50c893a91051a79c1b143d2a (diff)
Merge branch 'ubi'
Diffstat (limited to 'ubi-utils/src/eb_chain.h')
-rw-r--r--ubi-utils/src/eb_chain.h73
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
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+++ b/ubi-utils/src/eb_chain.h
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+#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__ */