ccbdb0d177
directly uses the disk ioctl's instead of relying on the drvctl device driver which is currently not mandatory.
135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/* $NetBSD: drvctl.c,v 1.1 2014/12/29 16:27:06 christos Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: drvctl.c,v 1.1 2014/12/29 16:27:06 christos Exp $");
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#include <sys/types.h>
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#include <sys/disk.h>
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#include <sys/drvctlio.h>
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#include <prop/proplib.h>
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#include <errno.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <ctype.h>
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#include "map.h"
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#include "gpt.h"
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int
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getdisksize(const char *name, u_int *sector_size, off_t *media_size)
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{
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prop_dictionary_t command_dict, args_dict, results_dict, data_dict,
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disk_info, geometry;
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prop_string_t string;
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prop_number_t number;
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int dfd, res;
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char *dname, *p;
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if (*sector_size && *media_size)
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return 0;
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if ((dfd = open("/dev/drvctl", O_RDONLY)) == -1) {
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warn("%s: /dev/drvctl", __func__);
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return -1;
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}
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command_dict = prop_dictionary_create();
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args_dict = prop_dictionary_create();
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string = prop_string_create_cstring_nocopy("get-properties");
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prop_dictionary_set(command_dict, "drvctl-command", string);
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prop_object_release(string);
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if ((dname = strdup(name[0] == 'r' ? name + 1 : name)) == NULL) {
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(void)close(dfd);
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return -1;
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}
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for (p = dname; *p; p++)
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continue;
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for (--p; p >= dname && !isdigit((unsigned char)*p); *p-- = '\0')
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continue;
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string = prop_string_create_cstring(dname);
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free(dname);
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prop_dictionary_set(args_dict, "device-name", string);
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prop_object_release(string);
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prop_dictionary_set(command_dict, "drvctl-arguments", args_dict);
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prop_object_release(args_dict);
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res = prop_dictionary_sendrecv_ioctl(command_dict, dfd, DRVCTLCOMMAND,
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&results_dict);
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(void)close(dfd);
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prop_object_release(command_dict);
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if (res) {
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warn("%s: prop_dictionary_sendrecv_ioctl", __func__);
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errno = res;
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return -1;
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}
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number = prop_dictionary_get(results_dict, "drvctl-error");
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if ((errno = prop_number_integer_value(number)) != 0)
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return -1;
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data_dict = prop_dictionary_get(results_dict, "drvctl-result-data");
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if (data_dict == NULL)
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goto out;
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disk_info = prop_dictionary_get(data_dict, "disk-info");
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if (disk_info == NULL)
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goto out;
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geometry = prop_dictionary_get(disk_info, "geometry");
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if (geometry == NULL)
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goto out;
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number = prop_dictionary_get(geometry, "sector-size");
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if (number == NULL)
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goto out;
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if (*sector_size == 0)
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*sector_size = prop_number_integer_value(number);
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number = prop_dictionary_get(geometry, "sectors-per-unit");
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if (number == NULL)
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goto out;
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if (*media_size == 0)
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*media_size = prop_number_integer_value(number) * *sector_size;
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return 0;
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out:
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errno = EINVAL;
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return -1;
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}
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