325 lines
7.8 KiB
C
325 lines
7.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2006 Mathew Jacob <mjacob@FreeBSD.org>
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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 AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <errno.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <strings.h>
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#include <assert.h>
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#include <libgeom.h>
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#include <unistd.h>
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#include <uuid.h>
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#include <geom/multipath/g_multipath.h>
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#include "core/geom.h"
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#include "misc/subr.h"
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uint32_t lib_version = G_LIB_VERSION;
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uint32_t version = G_MULTIPATH_VERSION;
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static void mp_main(struct gctl_req *, unsigned int);
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static void mp_label(struct gctl_req *);
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static void mp_clear(struct gctl_req *);
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static void mp_prefer(struct gctl_req *);
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struct g_command class_commands[] = {
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{
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"create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, NULL,
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{
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{ 'A', "active_active", NULL, G_TYPE_BOOL },
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{ 'R', "active_read", NULL, G_TYPE_BOOL },
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G_OPT_SENTINEL
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},
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"[-vAR] name prov ..."
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},
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{
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"label", G_FLAG_VERBOSE | G_FLAG_LOADKLD, mp_main,
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{
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{ 'A', "active_active", NULL, G_TYPE_BOOL },
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{ 'R', "active_read", NULL, G_TYPE_BOOL },
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G_OPT_SENTINEL
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},
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"[-vAR] name prov ..."
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},
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{ "configure", G_FLAG_VERBOSE, NULL,
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{
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{ 'A', "active_active", NULL, G_TYPE_BOOL },
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{ 'P', "active_passive", NULL, G_TYPE_BOOL },
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{ 'R', "active_read", NULL, G_TYPE_BOOL },
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G_OPT_SENTINEL
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},
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"[-vAPR] name"
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},
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{
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"add", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
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"[-v] name prov"
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},
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{
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"remove", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
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"[-v] name prov"
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},
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{
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"prefer", G_FLAG_VERBOSE, mp_main, G_NULL_OPTS,
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"[-v] prov ..."
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},
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{
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"fail", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
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"[-v] name prov"
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},
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{
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"restore", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
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"[-v] name prov"
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},
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{
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"rotate", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
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"[-v] name"
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},
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{
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"getactive", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
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"[-v] name"
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},
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{
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"destroy", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
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"[-v] name"
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},
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{
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"stop", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
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"[-v] name"
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},
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{
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"clear", G_FLAG_VERBOSE, mp_main, G_NULL_OPTS,
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"[-v] prov ..."
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},
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G_CMD_SENTINEL
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};
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static void
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mp_main(struct gctl_req *req, unsigned int flags __unused)
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{
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const char *name;
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name = gctl_get_ascii(req, "verb");
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if (name == NULL) {
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gctl_error(req, "No '%s' argument.", "verb");
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return;
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}
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if (strcmp(name, "label") == 0) {
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mp_label(req);
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} else if (strcmp(name, "clear") == 0) {
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mp_clear(req);
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} else if (strcmp(name, "prefer") == 0) {
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mp_prefer(req);
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} else {
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gctl_error(req, "Unknown command: %s.", name);
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}
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}
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static void
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mp_label(struct gctl_req *req)
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{
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struct g_multipath_metadata md;
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off_t disksize = 0, msize;
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uint8_t *sector, *rsector;
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char *ptr;
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uuid_t uuid;
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ssize_t secsize = 0, ssize;
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uint32_t status;
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const char *name, *name2, *mpname;
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int error, i, nargs, fd;
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nargs = gctl_get_int(req, "nargs");
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if (nargs < 2) {
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gctl_error(req, "wrong number of arguments.");
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return;
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}
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/*
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* First, check each provider to make sure it's the same size.
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* This also gets us our size and sectorsize for the metadata.
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*/
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for (i = 1; i < nargs; i++) {
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name = gctl_get_ascii(req, "arg%d", i);
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msize = g_get_mediasize(name);
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ssize = g_get_sectorsize(name);
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if (msize == 0 || ssize == 0) {
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gctl_error(req, "cannot get information about %s: %s.",
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name, strerror(errno));
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return;
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}
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if (i == 1) {
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secsize = ssize;
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disksize = msize;
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} else {
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if (secsize != ssize) {
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gctl_error(req, "%s sector size %ju different.",
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name, (intmax_t)ssize);
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return;
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}
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if (disksize != msize) {
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gctl_error(req, "%s media size %ju different.",
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name, (intmax_t)msize);
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return;
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}
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}
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}
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/*
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* Generate metadata.
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*/
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strlcpy(md.md_magic, G_MULTIPATH_MAGIC, sizeof(md.md_magic));
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md.md_version = G_MULTIPATH_VERSION;
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mpname = gctl_get_ascii(req, "arg0");
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strlcpy(md.md_name, mpname, sizeof(md.md_name));
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md.md_size = disksize;
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md.md_sectorsize = secsize;
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uuid_create(&uuid, &status);
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if (status != uuid_s_ok) {
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gctl_error(req, "cannot create a UUID.");
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return;
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}
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uuid_to_string(&uuid, &ptr, &status);
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if (status != uuid_s_ok) {
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gctl_error(req, "cannot stringify a UUID.");
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return;
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}
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strlcpy(md.md_uuid, ptr, sizeof (md.md_uuid));
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md.md_active_active = gctl_get_int(req, "active_active");
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if (gctl_get_int(req, "active_read"))
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md.md_active_active = 2;
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free(ptr);
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/*
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* Allocate a sector to write as metadata.
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*/
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sector = calloc(1, secsize);
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if (sector == NULL) {
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gctl_error(req, "unable to allocate metadata buffer");
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return;
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}
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rsector = malloc(secsize);
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if (rsector == NULL) {
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gctl_error(req, "unable to allocate metadata buffer");
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goto done;
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}
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/*
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* encode the metadata
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*/
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multipath_metadata_encode(&md, sector);
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/*
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* Store metadata on the initial provider.
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*/
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name = gctl_get_ascii(req, "arg1");
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error = g_metadata_store(name, sector, secsize);
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if (error != 0) {
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gctl_error(req, "cannot store metadata on %s: %s.", name, strerror(error));
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goto done;
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}
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/*
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* Now touch the rest of the providers to hint retaste.
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*/
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for (i = 2; i < nargs; i++) {
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name2 = gctl_get_ascii(req, "arg%d", i);
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fd = g_open(name2, 1);
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if (fd < 0) {
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fprintf(stderr, "Unable to open %s: %s.\n",
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name2, strerror(errno));
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continue;
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}
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if (pread(fd, rsector, secsize, disksize - secsize) !=
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(ssize_t)secsize) {
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fprintf(stderr, "Unable to read metadata from %s: %s.\n",
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name2, strerror(errno));
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g_close(fd);
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continue;
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}
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g_close(fd);
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if (memcmp(sector, rsector, secsize)) {
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fprintf(stderr, "No metadata found on %s."
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" It is not a path of %s.\n",
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name2, name);
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}
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}
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done:
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free(rsector);
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free(sector);
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}
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static void
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mp_clear(struct gctl_req *req)
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{
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const char *name;
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int error, i, nargs;
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nargs = gctl_get_int(req, "nargs");
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if (nargs < 1) {
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gctl_error(req, "Too few arguments.");
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return;
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}
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for (i = 0; i < nargs; i++) {
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name = gctl_get_ascii(req, "arg%d", i);
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error = g_metadata_clear(name, G_MULTIPATH_MAGIC);
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if (error != 0) {
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fprintf(stderr, "Can't clear metadata on %s: %s.\n",
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name, strerror(error));
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gctl_error(req, "Not fully done.");
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continue;
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}
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}
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}
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static void
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mp_prefer(struct gctl_req *req)
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{
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const char *name, *comp, *errstr;
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int nargs;
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nargs = gctl_get_int(req, "nargs");
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if (nargs != 2) {
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gctl_error(req, "Usage: prefer GEOM PROVIDER");
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return;
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}
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name = gctl_get_ascii(req, "arg0");
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comp = gctl_get_ascii(req, "arg1");
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errstr = gctl_issue (req);
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if (errstr != NULL) {
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fprintf(stderr, "Can't set %s preferred provider to %s: %s.\n",
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name, comp, errstr);
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}
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}
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