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/*
* command line partition parsing code
*
* Copyright (c) 2015 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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.
*
*/
#include <common.h>
#include <driver.h>
#include <fs.h>
#include <linux/err.h>
#include <cmdlinepart.h>
#define SIZE_REMAINING ((loff_t)-1)
int cmdlinepart_do_parse_one(const char *devname, const char *partstr,
const char **endp, loff_t *offset,
loff_t devsize, loff_t *retsize,
unsigned int partition_flags)
{
loff_t size;
char *end;
char buf[PATH_MAX] = {};
unsigned long flags = 0;
int ret = 0;
struct cdev *cdev;
memset(buf, 0, PATH_MAX);
if (*partstr == '-') {
size = SIZE_REMAINING;
end = (char *)partstr + 1;
} else {
size = strtoull_suffix(partstr, &end, 0);
}
if (*end == '@')
*offset = strtoull_suffix(end+1, &end, 0);
if (size == SIZE_REMAINING)
size = devsize - *offset;
partstr = end;
if (*partstr == '(') {
partstr++;
end = strchr((char *) partstr, ')');
if (!end) {
printf("could not find matching ')'\n");
return -EINVAL;
}
if (partition_flags & CMDLINEPART_ADD_DEVNAME)
sprintf(buf, "%s.", devname);
memcpy(buf + strlen(buf), partstr, end - partstr);
end++;
}
if (size + *offset > devsize) {
printf("%s: partition end is beyond device\n", buf);
return -EINVAL;
}
partstr = end;
if (*partstr == 'r' && *(partstr + 1) == 'o') {
flags |= DEVFS_PARTITION_READONLY;
end = (char *)(partstr + 2);
}
if (endp)
*endp = end;
*retsize = size;
cdev = devfs_add_partition(devname, *offset, size, flags, buf);
if (IS_ERR(cdev)) {
ret = PTR_ERR(cdev);
printf("cannot create %s: %s\n", buf, strerror(-ret));
}
return ret;
}
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