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// SPDX-License-Identifier: BSD-3-Clause
/*
* Copyright (c) 2016-2017, Linaro Ltd.
* All rights reserved.
*/
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <unistd.h>
#include "patch.h"
#include "qdl.h"
static struct patch *patches;
static struct patch *patches_last;
int patch_load(const char *patch_file)
{
struct patch *patch;
xmlNode *node;
xmlNode *root;
xmlDoc *doc;
int errors;
doc = xmlReadFile(patch_file, NULL, 0);
if (!doc) {
ux_err("failed to parse patch-type file \"%s\"\n", patch_file);
return -EINVAL;
}
root = xmlDocGetRootElement(doc);
for (node = root->children; node ; node = node->next) {
if (node->type != XML_ELEMENT_NODE)
continue;
if (xmlStrcmp(node->name, (xmlChar *)"patch")) {
ux_err("unrecognized tag \"%s\" in patch-type file, ignoring\n", node->name);
continue;
}
errors = 0;
patch = calloc(1, sizeof(struct patch));
patch->sector_size = attr_as_unsigned(node, "SECTOR_SIZE_IN_BYTES", &errors);
patch->byte_offset = attr_as_unsigned(node, "byte_offset", &errors);
patch->filename = attr_as_string(node, "filename", &errors);
patch->partition = attr_as_unsigned(node, "physical_partition_number", &errors);
patch->size_in_bytes = attr_as_unsigned(node, "size_in_bytes", &errors);
patch->start_sector = attr_as_string(node, "start_sector", &errors);
patch->value = attr_as_string(node, "value", &errors);
patch->what = attr_as_string(node, "what", &errors);
if (errors) {
ux_err("errors while parsing patch-type file \"%s\"\n", patch_file);
free(patch);
continue;
}
if (patches) {
patches_last->next = patch;
patches_last = patch;
} else {
patches = patch;
patches_last = patch;
}
}
xmlFreeDoc(doc);
return 0;
}
int patch_execute(struct qdl_device *qdl, int (*apply)(struct qdl_device *qdl, struct patch *patch))
{
struct patch *patch;
unsigned int count = 0;
unsigned int idx = 0;
int ret;
for (patch = patches; patch; patch = patch->next) {
if (!strcmp(patch->filename, "DISK"))
count++;
}
for (patch = patches; patch; patch = patch->next) {
if (strcmp(patch->filename, "DISK"))
continue;
ret = apply(qdl, patch);
if (ret)
return ret;
ux_progress("Applying patches", idx++, count);
}
ux_info("%d patches applied\n", idx);
return 0;
}
void free_patches(void)
{
struct patch *patch = patches;
struct patch *next;
for (patch = patches; patch; patch = next) {
next = patch->next;
free((void *)patch->filename);
free((void *)patch->start_sector);
free((void *)patch->value);
free((void *)patch->what);
free(patch);
}
patches = NULL;
}
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