118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
/*
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* fmap_sections.c, track which sections of the image will contain CBFSes
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*
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* Copyright (C) 2015 Google, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "cbfs_sections.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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struct descriptor_node {
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const struct flashmap_descriptor *val;
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struct descriptor_node *next;
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};
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static struct descriptor_list {
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struct descriptor_node *head;
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struct descriptor_node *tail;
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} cbfs_sections;
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static bool seen_primary_section = false;
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static void descriptor_list_prepend(struct descriptor_list *list,
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struct descriptor_node *new_head)
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{
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assert(list);
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assert(new_head);
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new_head->next = list->head;
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list->head = new_head;
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if (!list->tail)
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list->tail = new_head;
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}
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static void descriptor_list_append(struct descriptor_list *list,
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struct descriptor_node *new_tail)
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{
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assert(list);
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assert(new_tail);
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if (list->tail)
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list->tail->next = new_tail;
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list->tail = new_tail;
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if (!list->head)
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list->head = new_tail;
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}
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/* Implementation of cbfs module's callback; invoked during fmd file parsing */
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bool fmd_process_flag_cbfs(const struct flashmap_descriptor *node)
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{
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struct descriptor_node *list_node;
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if (node->list_len != 0)
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return false;
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list_node = (struct descriptor_node *)malloc(sizeof(*list_node));
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list_node->val = node;
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list_node->next = NULL;
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if (strcmp(node->name, SECTION_NAME_PRIMARY_CBFS) == 0) {
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descriptor_list_prepend(&cbfs_sections, list_node);
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seen_primary_section = true;
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} else {
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descriptor_list_append(&cbfs_sections, list_node);
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}
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return true;
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}
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cbfs_section_iterator_t cbfs_sections_iterator(void)
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{
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return cbfs_sections.head;
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}
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bool cbfs_sections_iterator_advance(cbfs_section_iterator_t *it)
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{
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assert(it);
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if (!*it)
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return false;
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*it = (*it)->next;
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return true;
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}
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const struct flashmap_descriptor *cbfs_sections_iterator_deref(
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cbfs_section_iterator_t it)
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{
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assert(it);
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return it->val;
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}
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bool cbfs_sections_primary_cbfs_accounted_for(void)
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{
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return seen_primary_section;
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}
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void cbfs_sections_cleanup(void)
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{
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for (struct descriptor_node *cur = cbfs_sections.head, *next = NULL;
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cur; cur = next) {
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next = cur->next;
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free(cur);
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}
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cbfs_sections.head = NULL;
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cbfs_sections.tail = NULL;
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}
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