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-rw-r--r--ubi-utils/sort-me-out/eb_chain.c280
1 files changed, 280 insertions, 0 deletions
diff --git a/ubi-utils/sort-me-out/eb_chain.c b/ubi-utils/sort-me-out/eb_chain.c
new file mode 100644
index 0000000..a018ae6
--- /dev/null
+++ b/ubi-utils/sort-me-out/eb_chain.c
@@ -0,0 +1,280 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006, 2007
+ *
+ * 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, dowsett@de.ibm.com
+ * Contact: Andreas Arnez, arnez@de.ibm.com
+ */
+
+/* see eb_chain.h */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include "unubi_analyze.h"
+#include "crc32.h"
+
+#define COPY(dst, src) \
+ do { \
+ dst = malloc(sizeof(*dst)); \
+ if (dst == NULL) \
+ return -ENOMEM; \
+ memcpy(dst, src, sizeof(*dst)); \
+ } while (0)
+
+
+/**
+ * inserts an eb_info into the chain starting at head, then searching
+ * linearly for the correct position;
+ * new should contain valid vid and ec headers and the data_crc should
+ * already have been checked before insertion, otherwise the chain
+ * could be have un an undesired manner;
+ * returns -ENOMEM if alloc fails, otherwise SHOULD always return 0,
+ * if not, the code reached the last line and returned -EAGAIN,
+ * meaning there is a bug or a case not being handled here;
+ **/
+int
+eb_chain_insert(struct eb_info **head, struct eb_info *new)
+{
+ uint32_t vol, num, ver;
+ uint32_t new_vol, new_num, new_ver;
+ struct eb_info *prev, *cur, *hist, *ins;
+ struct eb_info **prev_ptr;
+
+ if ((head == NULL) || (new == NULL))
+ return 0;
+
+ if (*head == NULL) {
+ COPY(*head, new);
+ (*head)->next = NULL;
+ return 0;
+ }
+
+ new_vol = __be32_to_cpu(new->vid.vol_id);
+ new_num = __be32_to_cpu(new->vid.lnum);
+ new_ver = __be32_to_cpu(new->vid.leb_ver);
+
+ /** TRAVERSE HORIZONTALY **/
+
+ cur = *head;
+ prev = NULL;
+
+ /* traverse until vol_id/lnum align */
+ vol = __be32_to_cpu(cur->vid.vol_id);
+ num = __be32_to_cpu(cur->vid.lnum);
+ while ((new_vol > vol) || ((new_vol == vol) && (new_num > num))) {
+ /* insert new at end of chain */
+ if (cur->next == NULL) {
+ COPY(ins, new);
+ ins->next = NULL;
+ cur->next = ins;
+ return 0;
+ }
+
+ prev = cur;
+ cur = cur->next;
+ vol = __be32_to_cpu(cur->vid.vol_id);
+ num = __be32_to_cpu(cur->vid.lnum);
+ }
+
+ if (prev == NULL)
+ prev_ptr = head;
+ else
+ prev_ptr = &(prev->next);
+
+ /* insert new into the middle of chain */
+ if ((new_vol != vol) || (new_num != num)) {
+ COPY(ins, new);
+ ins->next = cur;
+ *prev_ptr = ins;
+ return 0;
+ }
+
+ /** TRAVERSE VERTICALY **/
+
+ hist = cur;
+ prev = NULL;
+
+ /* traverse until versions align */
+ ver = __be32_to_cpu(cur->vid.leb_ver);
+ while (new_ver < ver) {
+ /* insert new at bottom of history */
+ if (hist->older == NULL) {
+ COPY(ins, new);
+ ins->next = NULL;
+ ins->older = NULL;
+ hist->older = ins;
+ return 0;
+ }
+
+ prev = hist;
+ hist = hist->older;
+ ver = __be32_to_cpu(hist->vid.leb_ver);
+ }
+
+ if (prev == NULL) {
+ /* replace active version */
+ COPY(ins, new);
+ ins->next = hist->next;
+ *prev_ptr = ins;
+
+ /* place cur in vertical histroy */
+ ins->older = hist;
+ hist->next = NULL;
+ return 0;
+ }
+
+ /* insert between versions, beneath active version */
+ COPY(ins, new);
+ ins->next = NULL;
+ ins->older = prev->older;
+ prev->older = ins;
+ return 0;
+}
+
+
+/**
+ * sets the pointer at pos to the position of the first entry in the chain
+ * with of vol_id and, if given, with the same lnum as *lnum;
+ * if there is no entry in the chain, then *pos is NULL on return;
+ * always returns 0;
+ **/
+int
+eb_chain_position(struct eb_info **head, uint32_t vol_id, uint32_t *lnum,
+ struct eb_info **pos)
+{
+ uint32_t vol, num;
+ struct eb_info *cur;
+
+ if ((head == NULL) || (*head == NULL) || (pos == NULL))
+ return 0;
+
+ *pos = NULL;
+
+ cur = *head;
+ while (cur != NULL) {
+ vol = __be32_to_cpu(cur->vid.vol_id);
+ num = __be32_to_cpu(cur->vid.lnum);
+
+ if ((vol_id == vol) && ((lnum == NULL) || (*lnum == num))) {
+ *pos = cur;
+ return 0;
+ }
+
+ cur = cur->next;
+ }
+
+ return 0;
+}
+
+
+/**
+ * prints to stream, the vol_id, lnum and leb_ver for each entry in the
+ * chain, starting at head;
+ * this is intended for debuging purposes;
+ * always returns 0;
+ *
+ * FIXME I do not like the double list traversion ...
+ **/
+int
+eb_chain_print(FILE* stream, struct eb_info *head)
+{
+ struct eb_info *cur;
+
+ if (stream == NULL)
+ stream = stdout;
+
+ if (head == NULL) {
+ fprintf(stream, "EMPTY\n");
+ return 0;
+ }
+ /* 012345678012345678012345678012301230123 0123 01234567 0123457 01234567*/
+ fprintf(stream, "VOL_ID LNUM LEB_VER EC VID DAT PBLK PADDR DSIZE EC\n");
+ cur = head;
+ while (cur != NULL) {
+ struct eb_info *hist;
+
+ fprintf(stream, "%08x %-8u %08x %-4s%-4s",
+ __be32_to_cpu(cur->vid.vol_id),
+ __be32_to_cpu(cur->vid.lnum),
+ __be32_to_cpu(cur->vid.leb_ver),
+ cur->ec_crc_ok ? "ok":"bad",
+ cur->vid_crc_ok ? "ok":"bad");
+ if (cur->vid.vol_type == UBI_VID_STATIC)
+ fprintf(stream, "%-4s", cur->data_crc_ok ? "ok":"bad");
+ else fprintf(stream, "%-4s", cur->data_crc_ok ? "ok":"ign");
+ fprintf(stream, " %-4d %08x %-8u %-8llu\n", cur->phys_block,
+ cur->phys_addr, __be32_to_cpu(cur->vid.data_size),
+ __be64_to_cpu(cur->ec.ec));
+
+ hist = cur->older;
+ while (hist != NULL) {
+ fprintf(stream, "%08x %-8u %08x %-4s%-4s",
+ __be32_to_cpu(hist->vid.vol_id),
+ __be32_to_cpu(hist->vid.lnum),
+ __be32_to_cpu(hist->vid.leb_ver),
+ hist->ec_crc_ok ? "ok":"bad",
+ hist->vid_crc_ok ? "ok":"bad");
+ if (hist->vid.vol_type == UBI_VID_STATIC)
+ fprintf(stream, "%-4s", hist->data_crc_ok ? "ok":"bad");
+ else fprintf(stream, "%-4s", hist->data_crc_ok ? "ok":"ign");
+ fprintf(stream, " %-4d %08x %-8u %-8llu (*)\n",
+ hist->phys_block, hist->phys_addr,
+ __be32_to_cpu(hist->vid.data_size),
+ __be64_to_cpu(hist->ec.ec));
+
+ hist = hist->older;
+ }
+ cur = cur->next;
+ }
+
+ return 0;
+}
+
+
+/**
+ * frees the memory of the entire chain, starting at head;
+ * head will be NULL on return;
+ * always returns 0;
+ **/
+int
+eb_chain_destroy(struct eb_info **head)
+{
+ if (head == NULL)
+ return 0;
+
+ while (*head != NULL) {
+ struct eb_info *cur;
+ struct eb_info *hist;
+
+ cur = *head;
+ *head = (*head)->next;
+
+ hist = cur->older;
+ while (hist != NULL) {
+ struct eb_info *temp;
+
+ temp = hist;
+ hist = hist->older;
+ free(temp);
+ }
+ free(cur);
+ }
+ return 0;
+}
+