240 lines
5.5 KiB
C
240 lines
5.5 KiB
C
/*
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* partition.c - parse a linux-like mtd partition definition and register
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* the new partitions
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*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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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 version 2
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* as published by the Free Software Foundation.
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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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*/
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/**
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* @file
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* @brief partition handling and addpart and delpart command
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*/
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#include <common.h>
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#include <command.h>
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#include <complete.h>
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#include <driver.h>
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#include <malloc.h>
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#include <partition.h>
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#include <errno.h>
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#include <xfuncs.h>
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#include <fs.h>
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#include <linux/stat.h>
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#include <libgen.h>
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#include <getopt.h>
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#include <linux/err.h>
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#define SIZE_REMAINING ((ulong)-1)
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#define PART_ADD_DEVNAME (1 << 0)
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static int mtd_part_do_parse_one(char *devname, const char *partstr,
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char **endp, loff_t *offset,
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loff_t devsize, size_t *retsize,
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unsigned int pflags)
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{
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loff_t size;
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char *end;
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char buf[PATH_MAX] = {};
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unsigned long flags = 0;
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int ret = 0;
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struct cdev *cdev;
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memset(buf, 0, PATH_MAX);
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if (*partstr == '-') {
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size = SIZE_REMAINING;
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end = (char *)partstr + 1;
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} else {
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size = strtoull_suffix(partstr, &end, 0);
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}
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if (*end == '@')
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*offset = strtoull_suffix(end+1, &end, 0);
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if (size == SIZE_REMAINING)
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size = devsize - *offset;
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partstr = end;
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if (*partstr == '(') {
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partstr++;
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end = strchr((char *) partstr, ')');
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if (!end) {
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printf("could not find matching ')'\n");
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return -EINVAL;
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}
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if (pflags & PART_ADD_DEVNAME)
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sprintf(buf, "%s.", devname);
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memcpy(buf + strlen(buf), partstr, end - partstr);
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end++;
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}
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if (size + *offset > devsize) {
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printf("%s: partition end is beyond device\n", buf);
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return -EINVAL;
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}
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partstr = end;
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if (*partstr == 'r' && *(partstr + 1) == 'o') {
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flags |= DEVFS_PARTITION_READONLY;
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end = (char *)(partstr + 2);
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}
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if (endp)
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*endp = end;
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*retsize = size;
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cdev = devfs_add_partition(devname, *offset, size, flags, buf);
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if (IS_ERR(cdev)) {
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ret = PTR_ERR(cdev);
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printf("cannot create %s: %s\n", buf, strerror(-ret));
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}
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return ret;
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}
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static int do_addpart(int argc, char *argv[])
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{
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char *devname;
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char *endp;
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loff_t offset = 0;
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loff_t devsize;
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struct stat s;
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int opt;
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unsigned int flags = PART_ADD_DEVNAME;
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while ((opt = getopt(argc, argv, "n")) > 0) {
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switch (opt) {
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case 'n':
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flags &= ~PART_ADD_DEVNAME;
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break;
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}
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}
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if (argc != optind + 2)
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return COMMAND_ERROR_USAGE;
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if (stat(argv[optind], &s)) {
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perror("addpart");
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return 1;
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}
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devsize = s.st_size;
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devname = basename(argv[optind]);
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endp = argv[optind + 1];
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while (1) {
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size_t size = 0;
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if (mtd_part_do_parse_one(devname, endp, &endp, &offset,
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devsize, &size, flags))
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return 1;
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offset += size;
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if (!*endp)
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break;
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if (*endp != ',') {
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printf("parse error\n");
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return 1;
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}
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endp++;
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}
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return 0;
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}
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BAREBOX_CMD_HELP_START(addpart)
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BAREBOX_CMD_HELP_TEXT("The size and the offset can be given in decimal (without any prefix) and")
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BAREBOX_CMD_HELP_TEXT("in hex (prefixed with 0x). Both can have an optional suffix K, M or G.")
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BAREBOX_CMD_HELP_TEXT("The size of the last partition can be specified as '-' for the remaining")
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BAREBOX_CMD_HELP_TEXT("space on the device. This format is the same as used by the Linux")
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BAREBOX_CMD_HELP_TEXT("kernel or cmdline mtd partitions.")
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BAREBOX_CMD_HELP_TEXT("")
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_OPT ("-n", "do not use the device name as prefix of the partition name")
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BAREBOX_CMD_HELP_OPT ("DEVICE", "device being worked on")
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BAREBOX_CMD_HELP_OPT ("PART", "SIZE1[@OFFSET1](NAME1)[RO],SIZE2[@OFFSET2](NAME2)[RO],...")
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BAREBOX_CMD_HELP_END
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/**
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* @page addpart_command
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The size and the offset can be given in decimal (without any prefix) and
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in hex (prefixed with 0x). Both can have an optional suffix K, M or G.
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The size of the last partition can be specified as '-' for the remaining
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space on the device. This format is the same as used by the Linux
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kernel or cmdline mtd partitions.
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\todo This command has to be reworked and will probably change it's API.
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*/
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BAREBOX_CMD_START(addpart)
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.cmd = do_addpart,
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BAREBOX_CMD_DESC("add a partition description to a device")
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BAREBOX_CMD_OPTS("[-n] DEVICE PART")
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BAREBOX_CMD_GROUP(CMD_GRP_PART)
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BAREBOX_CMD_HELP(cmd_addpart_help)
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BAREBOX_CMD_END
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static int do_delpart(int argc, char *argv[])
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{
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int i, err;
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for (i = 1; i < argc; i++) {
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err = devfs_del_partition(basename(argv[i]));
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if (err) {
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printf("cannot delete %s: %s\n", argv[i], strerror(-err));
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break;
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}
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}
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return 1;
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}
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BAREBOX_CMD_HELP_START(delpart)
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BAREBOX_CMD_HELP_TEXT("Delete partitions previously added to a device with addpart.")
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BAREBOX_CMD_HELP_END
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/**
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* @page delpart_command
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Partitions are created by adding their description with the addpart
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command. If you want to get rid of a partition again, use delpart. The
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argument list is taken as a list of partitions to be deleted.
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\todo Add an example
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*/
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BAREBOX_CMD_START(delpart)
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.cmd = do_delpart,
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BAREBOX_CMD_DESC("delete partition(s)")
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BAREBOX_CMD_OPTS("PART...")
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BAREBOX_CMD_GROUP(CMD_GRP_PART)
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BAREBOX_CMD_HELP(cmd_delpart_help)
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BAREBOX_CMD_COMPLETE(devfs_partition_complete)
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BAREBOX_CMD_END
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