Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/geom/raid/g_raid_ctl.c
Version:
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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("$FreeBSD$"); 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 49 static struct g_raid_softc * 50 g_raid_find_node(struct g_class *mp, const char *name) 51 { 52 struct g_raid_softc *sc; 53 struct g_geom *gp; 54 struct g_provider *pp; 55 struct g_raid_volume *vol; 56 57 /* Look for geom with specified name. */ 58 LIST_FOREACH(gp, &mp->geom, geom) { 59 sc = gp->softc; 60 if (sc == NULL) 61 continue; 62 if (sc->sc_stopping != 0) 63 continue; 64 if (strcasecmp(sc->sc_name, name) == 0) 65 return (sc); 66 } 67 68 /* Look for provider with specified name. */ 69 LIST_FOREACH(gp, &mp->geom, geom) { 70 sc = gp->softc; 71 if (sc == NULL) 72 continue; 73 if (sc->sc_stopping != 0) 74 continue; 75 LIST_FOREACH(pp, &gp->provider, provider) { 76 if (strcmp(pp->name, name) == 0) 77 return (sc); 78 if (strncmp(pp->name, "raid/", 5) == 0 && 79 strcmp(pp->name + 5, name) == 0) 80 return (sc); 81 } 82 } 83 84 /* Look for volume with specified name. */ 85 LIST_FOREACH(gp, &mp->geom, geom) { 86 sc = gp->softc; 87 if (sc == NULL) 88 continue; 89 if (sc->sc_stopping != 0) 90 continue; 91 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 92 if (strcmp(vol->v_name, name) == 0) 93 return (sc); 94 } 95 } 96 return (NULL); 97 } 98 99 static void 100 g_raid_ctl_label(struct gctl_req *req, struct g_class *mp) 101 { 102 struct g_geom *geom; 103 struct g_raid_softc *sc; 104 const char *format; 105 int *nargs; 106 int crstatus, ctlstatus; 107 char buf[64]; 108 109 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 110 if (nargs == NULL) { 111 gctl_error(req, "No '%s' argument.", "nargs"); 112 return; 113 } 114 if (*nargs < 4) { 115 gctl_error(req, "Invalid number of arguments."); 116 return; 117 } 118 format = gctl_get_asciiparam(req, "arg0"); 119 if (format == NULL) { 120 gctl_error(req, "No format received."); 121 return; 122 } 123 crstatus = g_raid_create_node_format(format, req, &geom); 124 if (crstatus == G_RAID_MD_TASTE_FAIL) { 125 gctl_error(req, "Failed to create array with format '%s'.", 126 format); 127 return; 128 } 129 sc = (struct g_raid_softc *)geom->softc; 130 g_topology_unlock(); 131 sx_xlock(&sc->sc_lock); 132 ctlstatus = G_RAID_MD_CTL(sc->sc_md, req); 133 if (ctlstatus < 0) { 134 gctl_error(req, "Command failed: %d.", ctlstatus); 135 if (crstatus == G_RAID_MD_TASTE_NEW) 136 g_raid_destroy_node(sc, 0); 137 } else { 138 if (crstatus == G_RAID_MD_TASTE_NEW) 139 snprintf(buf, sizeof(buf), "%s created\n", sc->sc_name); 140 else 141 snprintf(buf, sizeof(buf), "%s reused\n", sc->sc_name); 142 gctl_set_param_err(req, "output", buf, strlen(buf) + 1); 143 } 144 sx_xunlock(&sc->sc_lock); 145 g_topology_lock(); 146 } 147 148 static void 149 g_raid_ctl_stop(struct gctl_req *req, struct g_class *mp) 150 { 151 struct g_raid_softc *sc; 152 const char *nodename; 153 int *nargs, *force; 154 int error, how; 155 156 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 157 if (nargs == NULL) { 158 gctl_error(req, "No '%s' argument.", "nargs"); 159 return; 160 } 161 if (*nargs != 1) { 162 gctl_error(req, "Invalid number of arguments."); 163 return; 164 } 165 nodename = gctl_get_asciiparam(req, "arg0"); 166 if (nodename == NULL) { 167 gctl_error(req, "No array name received."); 168 return; 169 } 170 sc = g_raid_find_node(mp, nodename); 171 if (sc == NULL) { 172 gctl_error(req, "Array '%s' not found.", nodename); 173 return; 174 } 175 force = gctl_get_paraml(req, "force", sizeof(*force)); 176 if (force != NULL && *force) 177 how = G_RAID_DESTROY_HARD; 178 else 179 how = G_RAID_DESTROY_SOFT; 180 g_topology_unlock(); 181 sx_xlock(&sc->sc_lock); 182 error = g_raid_destroy(sc, how); 183 if (error != 0) 184 gctl_error(req, "Array is busy."); 185 g_topology_lock(); 186 } 187 188 static void 189 g_raid_ctl_other(struct gctl_req *req, struct g_class *mp) 190 { 191 struct g_raid_softc *sc; 192 const char *nodename; 193 int *nargs; 194 int ctlstatus; 195 196 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 197 if (nargs == NULL) { 198 gctl_error(req, "No '%s' argument.", "nargs"); 199 return; 200 } 201 if (*nargs < 1) { 202 gctl_error(req, "Invalid number of arguments."); 203 return; 204 } 205 nodename = gctl_get_asciiparam(req, "arg0"); 206 if (nodename == NULL) { 207 gctl_error(req, "No array name received."); 208 return; 209 } 210 sc = g_raid_find_node(mp, nodename); 211 if (sc == NULL) { 212 gctl_error(req, "Array '%s' not found.", nodename); 213 return; 214 } 215 g_topology_unlock(); 216 sx_xlock(&sc->sc_lock); 217 if (sc->sc_md != NULL) { 218 ctlstatus = G_RAID_MD_CTL(sc->sc_md, req); 219 if (ctlstatus < 0) 220 gctl_error(req, "Command failed: %d.", ctlstatus); 221 } 222 sx_xunlock(&sc->sc_lock); 223 g_topology_lock(); 224 } 225 226 void 227 g_raid_ctl(struct gctl_req *req, struct g_class *mp, const char *verb) 228 { 229 uint32_t *version; 230 231 g_topology_assert(); 232 233 version = gctl_get_paraml(req, "version", sizeof(*version)); 234 if (version == NULL) { 235 gctl_error(req, "No '%s' argument.", "version"); 236 return; 237 } 238 if (*version != G_RAID_VERSION) { 239 gctl_error(req, "Userland and kernel parts are out of sync."); 240 return; 241 } 242 243 if (strcmp(verb, "label") == 0) 244 g_raid_ctl_label(req, mp); 245 else if (strcmp(verb, "stop") == 0) 246 g_raid_ctl_stop(req, mp); 247 else 248 g_raid_ctl_other(req, mp); 249 }
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