1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004, 2007 Lukas Ertl 5 * Copyright (c) 2007, 2009 Ulf Lilleengen 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 #include <sys/param.h> 33 #include <sys/bio.h> 34 #include <sys/libkern.h> 35 #include <sys/malloc.h> 36 37 #include <geom/geom.h> 38 #include <geom/geom_dbg.h> 39 #include <geom/vinum/geom_vinum_var.h> 40 #include <geom/vinum/geom_vinum.h> 41 42 static int gv_sync(struct gv_volume *); 43 static int gv_rebuild_plex(struct gv_plex *); 44 static int gv_init_plex(struct gv_plex *); 45 static int gv_grow_plex(struct gv_plex *); 46 static int gv_sync_plex(struct gv_plex *, struct gv_plex *); 47 static struct gv_plex *gv_find_good_plex(struct gv_volume *); 48 49 void 50 gv_start_obj(struct g_geom *gp, struct gctl_req *req) 51 { 52 struct gv_softc *sc; 53 struct gv_volume *v; 54 struct gv_plex *p; 55 int *argc, *initsize; 56 char *argv, buf[20]; 57 int i, type; 58 59 argc = gctl_get_paraml(req, "argc", sizeof(*argc)); 60 initsize = gctl_get_paraml(req, "initsize", sizeof(*initsize)); 61 62 if (argc == NULL || *argc == 0) { 63 gctl_error(req, "no arguments given"); 64 return; 65 } 66 67 sc = gp->softc; 68 69 for (i = 0; i < *argc; i++) { 70 snprintf(buf, sizeof(buf), "argv%d", i); 71 argv = gctl_get_param(req, buf, NULL); 72 if (argv == NULL) 73 continue; 74 type = gv_object_type(sc, argv); 75 switch (type) { 76 case GV_TYPE_VOL: 77 v = gv_find_vol(sc, argv); 78 if (v != NULL) 79 gv_post_event(sc, GV_EVENT_START_VOLUME, v, 80 NULL, *initsize, 0); 81 break; 82 83 case GV_TYPE_PLEX: 84 p = gv_find_plex(sc, argv); 85 if (p != NULL) 86 gv_post_event(sc, GV_EVENT_START_PLEX, p, NULL, 87 *initsize, 0); 88 break; 89 90 case GV_TYPE_SD: 91 case GV_TYPE_DRIVE: 92 /* XXX Not implemented, but what is the use? */ 93 gctl_error(req, "unable to start '%s' - not yet supported", 94 argv); 95 return; 96 default: 97 gctl_error(req, "unknown object '%s'", argv); 98 return; 99 } 100 } 101 } 102 103 int 104 gv_start_plex(struct gv_plex *p) 105 { 106 struct gv_volume *v; 107 struct gv_plex *up; 108 struct gv_sd *s; 109 int error; 110 111 KASSERT(p != NULL, ("gv_start_plex: NULL p")); 112 113 error = 0; 114 v = p->vol_sc; 115 116 /* RAID5 plexes can either be init, rebuilt or grown. */ 117 if (p->org == GV_PLEX_RAID5) { 118 if (p->state > GV_PLEX_DEGRADED) { 119 LIST_FOREACH(s, &p->subdisks, in_plex) { 120 if (s->flags & GV_SD_GROW) { 121 error = gv_grow_plex(p); 122 return (error); 123 } 124 } 125 } else if (p->state == GV_PLEX_DEGRADED) { 126 error = gv_rebuild_plex(p); 127 } else 128 error = gv_init_plex(p); 129 } else { 130 /* We want to sync from the other plex if we're down. */ 131 if (p->state == GV_PLEX_DOWN && v->plexcount > 1) { 132 up = gv_find_good_plex(v); 133 if (up == NULL) { 134 G_VINUM_DEBUG(1, "unable to find a good plex"); 135 return (ENXIO); 136 } 137 g_topology_lock(); 138 error = gv_access(v->provider, 1, 1, 0); 139 if (error) { 140 g_topology_unlock(); 141 G_VINUM_DEBUG(0, "sync from '%s' failed to " 142 "access volume: %d", up->name, error); 143 return (error); 144 } 145 g_topology_unlock(); 146 error = gv_sync_plex(p, up); 147 if (error) 148 return (error); 149 /* 150 * In case we have a stripe that is up, check whether it can be 151 * grown. 152 */ 153 } else if (p->org == GV_PLEX_STRIPED && 154 p->state != GV_PLEX_DOWN) { 155 LIST_FOREACH(s, &p->subdisks, in_plex) { 156 if (s->flags & GV_SD_GROW) { 157 error = gv_grow_plex(p); 158 break; 159 } 160 } 161 } 162 } 163 return (error); 164 } 165 166 int 167 gv_start_vol(struct gv_volume *v) 168 { 169 struct gv_plex *p; 170 int error; 171 172 KASSERT(v != NULL, ("gv_start_vol: NULL v")); 173 174 error = 0; 175 176 if (v->plexcount == 0) 177 return (ENXIO); 178 179 else if (v->plexcount == 1) { 180 p = LIST_FIRST(&v->plexes); 181 KASSERT(p != NULL, ("gv_start_vol: NULL p on %s", v->name)); 182 error = gv_start_plex(p); 183 } else 184 error = gv_sync(v); 185 186 return (error); 187 } 188 189 /* Sync a plex p from the plex up. */ 190 static int 191 gv_sync_plex(struct gv_plex *p, struct gv_plex *up) 192 { 193 int error; 194 195 KASSERT(p != NULL, ("%s: NULL p", __func__)); 196 KASSERT(up != NULL, ("%s: NULL up", __func__)); 197 if ((p == up) || (p->state == GV_PLEX_UP)) 198 return (0); 199 if (p->flags & GV_PLEX_SYNCING || 200 p->flags & GV_PLEX_REBUILDING || 201 p->flags & GV_PLEX_GROWING) { 202 return (EINPROGRESS); 203 } 204 p->synced = 0; 205 p->flags |= GV_PLEX_SYNCING; 206 G_VINUM_DEBUG(1, "starting sync of plex %s", p->name); 207 error = gv_sync_request(up, p, p->synced, 208 MIN(GV_DFLT_SYNCSIZE, up->size - p->synced), 209 BIO_READ, NULL); 210 if (error) { 211 G_VINUM_DEBUG(0, "error syncing plex %s", p->name); 212 return (error); 213 } 214 return (0); 215 } 216 217 /* Return a good plex from volume v. */ 218 static struct gv_plex * 219 gv_find_good_plex(struct gv_volume *v) 220 { 221 struct gv_plex *up; 222 223 /* Find the plex that's up. */ 224 up = NULL; 225 LIST_FOREACH(up, &v->plexes, in_volume) { 226 if (up->state == GV_PLEX_UP) 227 break; 228 } 229 /* Didn't find a good plex. */ 230 return (up); 231 } 232 233 static int 234 gv_sync(struct gv_volume *v) 235 { 236 struct gv_softc *sc __diagused; 237 struct gv_plex *p, *up; 238 int error; 239 240 KASSERT(v != NULL, ("gv_sync: NULL v")); 241 sc = v->vinumconf; 242 KASSERT(sc != NULL, ("gv_sync: NULL sc on %s", v->name)); 243 244 up = gv_find_good_plex(v); 245 if (up == NULL) 246 return (ENXIO); 247 g_topology_lock(); 248 error = gv_access(v->provider, 1, 1, 0); 249 if (error) { 250 g_topology_unlock(); 251 G_VINUM_DEBUG(0, "sync from '%s' failed to access volume: %d", 252 up->name, error); 253 return (error); 254 } 255 g_topology_unlock(); 256 257 /* Go through the good plex, and issue BIO's to all other plexes. */ 258 LIST_FOREACH(p, &v->plexes, in_volume) { 259 error = gv_sync_plex(p, up); 260 if (error) 261 break; 262 } 263 return (0); 264 } 265 266 static int 267 gv_rebuild_plex(struct gv_plex *p) 268 { 269 struct gv_drive *d; 270 struct gv_sd *s; 271 int error; 272 273 if (p->flags & GV_PLEX_SYNCING || 274 p->flags & GV_PLEX_REBUILDING || 275 p->flags & GV_PLEX_GROWING) 276 return (EINPROGRESS); 277 /* 278 * Make sure that all subdisks have consumers. We won't allow a rebuild 279 * unless every subdisk have one. 280 */ 281 LIST_FOREACH(s, &p->subdisks, in_plex) { 282 d = s->drive_sc; 283 if (d == NULL || (d->flags & GV_DRIVE_REFERENCED)) { 284 G_VINUM_DEBUG(0, "unable to rebuild %s, subdisk(s) have" 285 " no drives", p->name); 286 return (ENXIO); 287 } 288 } 289 p->flags |= GV_PLEX_REBUILDING; 290 p->synced = 0; 291 292 g_topology_assert_not(); 293 g_topology_lock(); 294 error = gv_access(p->vol_sc->provider, 1, 1, 0); 295 if (error) { 296 G_VINUM_DEBUG(0, "unable to access provider"); 297 return (0); 298 } 299 g_topology_unlock(); 300 301 gv_parity_request(p, GV_BIO_REBUILD, 0); 302 return (0); 303 } 304 305 static int 306 gv_grow_plex(struct gv_plex *p) 307 { 308 struct gv_volume *v; 309 struct gv_sd *s; 310 off_t origsize, origlength; 311 int error, sdcount; 312 313 KASSERT(p != NULL, ("gv_grow_plex: NULL p")); 314 v = p->vol_sc; 315 KASSERT(v != NULL, ("gv_grow_plex: NULL v")); 316 317 if (p->flags & GV_PLEX_GROWING || 318 p->flags & GV_PLEX_SYNCING || 319 p->flags & GV_PLEX_REBUILDING) 320 return (EINPROGRESS); 321 g_topology_lock(); 322 error = gv_access(v->provider, 1, 1, 0); 323 g_topology_unlock(); 324 if (error) { 325 G_VINUM_DEBUG(0, "unable to access provider"); 326 return (error); 327 } 328 329 /* XXX: This routine with finding origsize is used two other places as 330 * well, so we should create a function for it. */ 331 sdcount = p->sdcount; 332 LIST_FOREACH(s, &p->subdisks, in_plex) { 333 if (s->flags & GV_SD_GROW) 334 sdcount--; 335 } 336 s = LIST_FIRST(&p->subdisks); 337 if (s == NULL) { 338 G_VINUM_DEBUG(0, "error growing plex without subdisks"); 339 return (GV_ERR_NOTFOUND); 340 } 341 p->flags |= GV_PLEX_GROWING; 342 origsize = (sdcount - 1) * s->size; 343 origlength = (sdcount - 1) * p->stripesize; 344 p->synced = 0; 345 G_VINUM_DEBUG(1, "starting growing of plex %s", p->name); 346 gv_grow_request(p, 0, MIN(origlength, origsize), BIO_READ, NULL); 347 348 return (0); 349 } 350 351 static int 352 gv_init_plex(struct gv_plex *p) 353 { 354 struct gv_drive *d; 355 struct gv_sd *s; 356 int error; 357 off_t start; 358 caddr_t data; 359 360 KASSERT(p != NULL, ("gv_init_plex: NULL p")); 361 362 LIST_FOREACH(s, &p->subdisks, in_plex) { 363 if (s->state == GV_SD_INITIALIZING) 364 return (EINPROGRESS); 365 gv_set_sd_state(s, GV_SD_INITIALIZING, GV_SETSTATE_FORCE); 366 s->init_size = GV_DFLT_SYNCSIZE; 367 start = s->drive_offset + s->initialized; 368 d = s->drive_sc; 369 if (d == NULL) { 370 G_VINUM_DEBUG(0, "subdisk %s has no drive yet", s->name); 371 break; 372 } 373 /* 374 * Take the lock here since we need to avoid a race in 375 * gv_init_request if the BIO is completed before the lock is 376 * released. 377 */ 378 g_topology_lock(); 379 error = g_access(d->consumer, 0, 1, 0); 380 g_topology_unlock(); 381 if (error) { 382 G_VINUM_DEBUG(0, "error accessing consumer when " 383 "initializing %s", s->name); 384 break; 385 } 386 data = g_malloc(s->init_size, M_WAITOK | M_ZERO); 387 gv_init_request(s, start, data, s->init_size); 388 } 389 return (0); 390 } 391