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/*
* partition.c - parse a linux-like mtd partition definition and register
* the new partitions
*
* Copyright (c) 2007 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.
*
*/
/**
* @file
* @brief partition handling and addpart and delpart command
*/
#include <common.h>
#include <command.h>
#include <complete.h>
#include <driver.h>
#include <malloc.h>
#include <partition.h>
#include <errno.h>
#include <xfuncs.h>
#include <fs.h>
#include <linux/stat.h>
#include <libgen.h>
#include <getopt.h>
#include <linux/err.h>
#define SIZE_REMAINING ((ulong)-1)
#define PART_ADD_DEVNAME (1 << 0)
static int mtd_part_do_parse_one(char *devname, const char *partstr,
char **endp, loff_t *offset,
loff_t devsize, size_t *retsize,
unsigned int pflags)
{
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 (pflags & PART_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;
}
static int do_addpart(int argc, char *argv[])
{
char *devname;
char *endp;
loff_t offset = 0;
loff_t devsize;
struct stat s;
int opt;
unsigned int flags = PART_ADD_DEVNAME;
while ((opt = getopt(argc, argv, "n")) > 0) {
switch (opt) {
case 'n':
flags &= ~PART_ADD_DEVNAME;
break;
}
}
if (argc != optind + 2)
return COMMAND_ERROR_USAGE;
if (stat(argv[optind], &s)) {
perror("addpart");
return 1;
}
devsize = s.st_size;
devname = basename(argv[optind]);
endp = argv[optind + 1];
while (1) {
size_t size = 0;
if (mtd_part_do_parse_one(devname, endp, &endp, &offset,
devsize, &size, flags))
return 1;
offset += size;
if (!*endp)
break;
if (*endp != ',') {
printf("parse error\n");
return 1;
}
endp++;
}
return 0;
}
BAREBOX_CMD_HELP_START(addpart)
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT ("-n", "do not use the device name as prefix of the partition name")
BAREBOX_CMD_HELP_TEXT("")
BAREBOX_CMD_HELP_TEXT("Create partitions on device DEVICE using the partition description")
BAREBOX_CMD_HELP_TEXT("from PART.")
BAREBOX_CMD_HELP_TEXT("PART contains a partition description compatible to the Kernel mtd")
BAREBOX_CMD_HELP_TEXT("commandline partition description:")
BAREBOX_CMD_HELP_TEXT("SIZE1[@OFFSET1](NAME1)[RO],SIZE2[@OFFSET2](NAME2)[RO],...")
BAREBOX_CMD_HELP_TEXT("The size and the offset can be given in decimal (without any prefix) and")
BAREBOX_CMD_HELP_TEXT("in hex (prefixed with 0x). Both can have an optional suffix K, M or G.")
BAREBOX_CMD_HELP_TEXT("The size of the last partition can be specified as '-' for the remaining")
BAREBOX_CMD_HELP_TEXT("space on the device.")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(addpart)
.cmd = do_addpart,
BAREBOX_CMD_DESC("add a partition description to a device")
BAREBOX_CMD_OPTS("[-n] DEVICE PART")
BAREBOX_CMD_GROUP(CMD_GRP_PART)
BAREBOX_CMD_HELP(cmd_addpart_help)
BAREBOX_CMD_END
static int do_delpart(int argc, char *argv[])
{
int i, err;
for (i = 1; i < argc; i++) {
err = devfs_del_partition(basename(argv[i]));
if (err) {
printf("cannot delete %s: %s\n", argv[i], strerror(-err));
break;
}
}
return 1;
}
BAREBOX_CMD_HELP_START(delpart)
BAREBOX_CMD_HELP_TEXT("Delete partitions previously added to a device with addpart.")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(delpart)
.cmd = do_delpart,
BAREBOX_CMD_DESC("delete partition(s)")
BAREBOX_CMD_OPTS("PART...")
BAREBOX_CMD_GROUP(CMD_GRP_PART)
BAREBOX_CMD_HELP(cmd_delpart_help)
BAREBOX_CMD_COMPLETE(devfs_partition_complete)
BAREBOX_CMD_END
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