g_raid_ctl.c revision 234940
1/*- 2 * Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/geom/raid/g_raid_ctl.c 234940 2012-05-03 05:32:56Z mav $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/kernel.h> 33#include <sys/module.h> 34#include <sys/lock.h> 35#include <sys/mutex.h> 36#include <sys/bio.h> 37#include <sys/sysctl.h> 38#include <sys/malloc.h> 39#include <sys/bitstring.h> 40#include <vm/uma.h> 41#include <machine/atomic.h> 42#include <geom/geom.h> 43#include <sys/proc.h> 44#include <sys/kthread.h> 45#include <geom/raid/g_raid.h> 46#include "g_raid_md_if.h" 47 48 49static struct g_raid_softc * 50g_raid_find_node(struct g_class *mp, const char *name) 51{ 52 struct g_raid_softc *sc; 53 struct g_geom *gp; 54 55 LIST_FOREACH(gp, &mp->geom, geom) { 56 sc = gp->softc; 57 if (sc == NULL) 58 continue; 59 if (sc->sc_stopping != 0) 60 continue; 61 if (strcasecmp(sc->sc_name, name) == 0) 62 return (sc); 63 } 64 return (NULL); 65} 66 67static void 68g_raid_ctl_label(struct gctl_req *req, struct g_class *mp) 69{ 70 struct g_geom *geom; 71 struct g_raid_softc *sc; 72 const char *format; 73 int *nargs; 74 int crstatus, ctlstatus; 75 char buf[64]; 76 77 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 78 if (nargs == NULL) { 79 gctl_error(req, "No '%s' argument.", "nargs"); 80 return; 81 } 82 if (*nargs < 4) { 83 gctl_error(req, "Invalid number of arguments."); 84 return; 85 } 86 format = gctl_get_asciiparam(req, "arg0"); 87 if (format == NULL) { 88 gctl_error(req, "No format recieved."); 89 return; 90 } 91 crstatus = g_raid_create_node_format(format, req, &geom); 92 if (crstatus == G_RAID_MD_TASTE_FAIL) { 93 gctl_error(req, "Failed to create array with format '%s'.", 94 format); 95 return; 96 } 97 sc = (struct g_raid_softc *)geom->softc; 98 g_topology_unlock(); 99 sx_xlock(&sc->sc_lock); 100 ctlstatus = G_RAID_MD_CTL(sc->sc_md, req); 101 if (ctlstatus < 0) { 102 gctl_error(req, "Command failed: %d.", ctlstatus); 103 if (crstatus == G_RAID_MD_TASTE_NEW) 104 g_raid_destroy_node(sc, 0); 105 } else { 106 if (crstatus == G_RAID_MD_TASTE_NEW) 107 snprintf(buf, sizeof(buf), "%s created\n", sc->sc_name); 108 else 109 snprintf(buf, sizeof(buf), "%s reused\n", sc->sc_name); 110 gctl_set_param_err(req, "output", buf, strlen(buf) + 1); 111 } 112 sx_xunlock(&sc->sc_lock); 113 g_topology_lock(); 114} 115 116static void 117g_raid_ctl_stop(struct gctl_req *req, struct g_class *mp) 118{ 119 struct g_raid_softc *sc; 120 const char *nodename; 121 int *nargs, *force; 122 int error, how; 123 124 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 125 if (nargs == NULL) { 126 gctl_error(req, "No '%s' argument.", "nargs"); 127 return; 128 } 129 if (*nargs != 1) { 130 gctl_error(req, "Invalid number of arguments."); 131 return; 132 } 133 nodename = gctl_get_asciiparam(req, "arg0"); 134 if (nodename == NULL) { 135 gctl_error(req, "No array name recieved."); 136 return; 137 } 138 sc = g_raid_find_node(mp, nodename); 139 if (sc == NULL) { 140 gctl_error(req, "Array '%s' not found.", nodename); 141 return; 142 } 143 force = gctl_get_paraml(req, "force", sizeof(*force)); 144 if (force != NULL && *force) 145 how = G_RAID_DESTROY_HARD; 146 else 147 how = G_RAID_DESTROY_SOFT; 148 g_topology_unlock(); 149 sx_xlock(&sc->sc_lock); 150 error = g_raid_destroy(sc, how); 151 if (error != 0) 152 sx_xunlock(&sc->sc_lock); 153 g_topology_lock(); 154} 155 156static void 157g_raid_ctl_other(struct gctl_req *req, struct g_class *mp) 158{ 159 struct g_raid_softc *sc; 160 const char *nodename; 161 int *nargs; 162 int ctlstatus; 163 164 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 165 if (nargs == NULL) { 166 gctl_error(req, "No '%s' argument.", "nargs"); 167 return; 168 } 169 if (*nargs < 1) { 170 gctl_error(req, "Invalid number of arguments."); 171 return; 172 } 173 nodename = gctl_get_asciiparam(req, "arg0"); 174 if (nodename == NULL) { 175 gctl_error(req, "No array name recieved."); 176 return; 177 } 178 sc = g_raid_find_node(mp, nodename); 179 if (sc == NULL) { 180 gctl_error(req, "Array '%s' not found.", nodename); 181 return; 182 } 183 g_topology_unlock(); 184 sx_xlock(&sc->sc_lock); 185 if (sc->sc_md != NULL) { 186 ctlstatus = G_RAID_MD_CTL(sc->sc_md, req); 187 if (ctlstatus < 0) 188 gctl_error(req, "Command failed: %d.", ctlstatus); 189 } 190 sx_xunlock(&sc->sc_lock); 191 g_topology_lock(); 192} 193 194void 195g_raid_ctl(struct gctl_req *req, struct g_class *mp, const char *verb) 196{ 197 uint32_t *version; 198 199 g_topology_assert(); 200 201 version = gctl_get_paraml(req, "version", sizeof(*version)); 202 if (version == NULL) { 203 gctl_error(req, "No '%s' argument.", "version"); 204 return; 205 } 206 if (*version != G_RAID_VERSION) { 207 gctl_error(req, "Userland and kernel parts are out of sync."); 208 return; 209 } 210 211 if (strcmp(verb, "label") == 0) 212 g_raid_ctl_label(req, mp); 213 else if (strcmp(verb, "stop") == 0) 214 g_raid_ctl_stop(req, mp); 215 else 216 g_raid_ctl_other(req, mp); 217} 218