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// SPDX-License-Identifier: BSD-3-Clause
/*
* Copyright (c) 2016-2017, Linaro Ltd.
* All rights reserved.
*/
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include "list.h"
#include "read.h"
#include "qdl.h"
#include "oscompat.h"
#include "gpt.h"
static struct list_head read_ops = LIST_INIT(read_ops);
int read_op_load(const char *read_op_file, const char *incdir)
{
struct read_op *read_op;
xmlNode *node;
xmlNode *root;
xmlDoc *doc;
int errors;
char tmp[PATH_MAX];
doc = xmlReadFile(read_op_file, NULL, 0);
if (!doc) {
ux_err("failed to parse read-type file \"%s\"\n", read_op_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 *)"read")) {
ux_err("unrecognized tag \"%s\" in read-type file \"%s\", ignoring\n",
node->name, read_op_file);
continue;
}
errors = 0;
read_op = calloc(1, sizeof(struct read_op));
read_op->sector_size = attr_as_unsigned(node, "SECTOR_SIZE_IN_BYTES", &errors);
read_op->filename = attr_as_string(node, "filename", &errors);
read_op->partition = attr_as_unsigned(node, "physical_partition_number", &errors);
read_op->num_sectors = attr_as_unsigned(node, "num_partition_sectors", &errors);
read_op->start_sector = attr_as_string(node, "start_sector", &errors);
if (errors) {
ux_err("errors while parsing read-type file \"%s\"\n", read_op_file);
free(read_op);
continue;
}
if (incdir) {
snprintf(tmp, PATH_MAX, "%s/%s", incdir, read_op->filename);
if (access(tmp, F_OK) != -1)
read_op->filename = strdup(tmp);
}
list_add(&read_ops, &read_op->node);
}
xmlFreeDoc(doc);
return 0;
}
int read_op_execute(struct qdl_device *qdl, int (*apply)(struct qdl_device *qdl, struct read_op *read_op, int fd))
{
struct read_op *read_op;
int ret;
int fd;
list_for_each_entry(read_op, &read_ops, node) {
fd = open(read_op->filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
if (fd < 0) {
ux_info("unable to open %s...\n", read_op->filename);
return ret;
}
ret = apply(qdl, read_op, fd);
close(fd);
if (ret)
return ret;
}
return 0;
}
int read_cmd_add(const char *address, const char *filename)
{
unsigned int start_sector;
unsigned int num_sectors;
struct read_op *read_op;
char *gpt_partition;
int partition;
char buf[20];
int ret;
ret = parse_storage_address(address, &partition, &start_sector, &num_sectors, &gpt_partition);
if (ret < 0)
return ret;
if (num_sectors == 0 && !gpt_partition) {
ux_err("read command without length specifier not supported\n");
return -1;
}
read_op = calloc(1, sizeof(struct read_op));
read_op->sector_size = 0;
read_op->filename = strdup(filename);
read_op->partition = partition;
read_op->num_sectors = num_sectors;
sprintf(buf, "%u", start_sector);
read_op->start_sector = strdup(buf);
read_op->gpt_partition = gpt_partition;
list_add(&read_ops, &read_op->node);
return 0;
}
int read_resolve_gpt_deferrals(struct qdl_device *qdl)
{
struct read_op *read_op;
unsigned int start_sector;
char buf[20];
int ret;
list_for_each_entry(read_op, &read_ops, node) {
if (!read_op->gpt_partition)
continue;
ret = gpt_find_by_name(qdl, read_op->gpt_partition, &read_op->partition,
&start_sector, &read_op->num_sectors);
if (ret < 0)
return -1;
sprintf(buf, "%u", start_sector);
read_op->start_sector = strdup(buf);
}
return 0;
}
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