sys/geom/vinum/geom_vinum_rm.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  *  Copyright (c) 2004, 2007 Lukas Ertl
   5  *  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/libkern.h>
  35 #include <sys/malloc.h>
  36
  37 #include <geom/geom.h>
  38 #include <geom/vinum/geom_vinum_var.h>
  39 #include <geom/vinum/geom_vinum.h>
  40
  41 /* General 'remove' routine. */
  42 void
  43 gv_remove(struct g_geom *gp, struct gctl_req *req)
  44 {
  45         struct gv_softc *sc;
  46         struct gv_volume *v;
  47         struct gv_plex *p;
  48         struct gv_sd *s;
  49         struct gv_drive *d;
  50         int *argc, *flags;
  51         char *argv, buf[20];
  52         int i, type;
  53
  54         argc = gctl_get_paraml(req, "argc", sizeof(*argc));
  55
  56         if (argc == NULL || *argc == 0) {
  57                 gctl_error(req, "no arguments given");
  58                 return;
  59         }
  60
  61         flags = gctl_get_paraml(req, "flags", sizeof(*flags));
  62         if (flags == NULL) {
  63                 gctl_error(req, "no flags given");
  64                 return;
  65         }
  66
  67         sc = gp->softc;
  68
  69         /* XXX config locking */
  70
  71         for (i = 0; i < *argc; i++) {
  72                 snprintf(buf, sizeof(buf), "argv%d", i);
  73                 argv = gctl_get_param(req, buf, NULL);
  74                 if (argv == NULL)
  75                         continue;
  76                 type = gv_object_type(sc, argv);
  77                 switch (type) {
  78                 case GV_TYPE_VOL:
  79                         v = gv_find_vol(sc, argv);
  80
  81                         /*
  82                          * If this volume has plexes, we want a recursive
  83                          * removal.
  84                          */
  85                         if (!LIST_EMPTY(&v->plexes) && !(*flags & GV_FLAG_R)) {
  86                                 gctl_error(req, "volume '%s' has attached "
  87                                     "plexes - need recursive removal", v->name);
  88                                 return;
  89                         }
  90
  91                         gv_post_event(sc, GV_EVENT_RM_VOLUME, v, NULL, 0, 0);
  92                         break;
  93
  94                 case GV_TYPE_PLEX:
  95                         p = gv_find_plex(sc, argv);
  96
  97                         /*
  98                          * If this plex has subdisks, we want a recursive
  99                          * removal.
 100                          */
 101                         if (!LIST_EMPTY(&p->subdisks) &&
 102                             !(*flags & GV_FLAG_R)) {
 103                                 gctl_error(req, "plex '%s' has attached "
 104                                     "subdisks - need recursive removal",
 105                                     p->name);
 106                                 return;
 107                         }
 108
 109                         /* Don't allow removal of the only plex of a volume. */
 110                         if (p->vol_sc != NULL && p->vol_sc->plexcount == 1) {
 111                                 gctl_error(req, "plex '%s' is still attached "
 112                                     "to volume '%s'", p->name, p->volume);
 113                                 return;
 114                         }
 115
 116                         gv_post_event(sc, GV_EVENT_RM_PLEX, p, NULL, 0, 0);
 117                         break;
 118
 119                 case GV_TYPE_SD:
 120                         s = gv_find_sd(sc, argv);
 121
 122                         /* Don't allow removal if attached to a plex. */
 123                         if (s->plex_sc != NULL) {
 124                                 gctl_error(req, "subdisk '%s' is still attached"
 125                                     " to plex '%s'", s->name, s->plex_sc->name);
 126                                 return;
 127                         }
 128
 129                         gv_post_event(sc, GV_EVENT_RM_SD, s, NULL, 0, 0);
 130                         break;
 131
 132                 case GV_TYPE_DRIVE:
 133                         d = gv_find_drive(sc, argv);
 134                         /* We don't allow to remove open drives. */
 135                         if (gv_consumer_is_open(d->consumer) &&
 136                             !(*flags & GV_FLAG_F)) {
 137                                 gctl_error(req, "drive '%s' is open", d->name);
 138                                 return;
 139                         }
 140
 141                         /* A drive with subdisks needs a recursive removal. */
 142 /*                      if (!LIST_EMPTY(&d->subdisks) &&
 143                             !(*flags & GV_FLAG_R)) {
 144                                 gctl_error(req, "drive '%s' still has subdisks"
 145                                     " - need recursive removal", d->name);
 146                                 return;
 147                         }*/
 148
 149                         gv_post_event(sc, GV_EVENT_RM_DRIVE, d, NULL, *flags,
 150                             0);
 151                         break;
 152
 153                 default:
 154                         gctl_error(req, "unknown object '%s'", argv);
 155                         return;
 156                 }
 157         }
 158
 159         gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0);
 160 }
 161
 162 /* Resets configuration */
 163 int
 164 gv_resetconfig(struct gv_softc *sc)
 165 {
 166         struct gv_drive *d, *d2;
 167         struct gv_volume *v, *v2;
 168         struct gv_plex *p, *p2;
 169         struct gv_sd *s, *s2;
 170
 171         /* First make sure nothing is open. */
 172         LIST_FOREACH_SAFE(d, &sc->drives, drive, d2) {
 173                 if (gv_consumer_is_open(d->consumer)) {
 174                         return (GV_ERR_ISBUSY);
 175                 }
 176         }
 177
 178         /* Make sure nothing is going on internally. */
 179         LIST_FOREACH_SAFE(p, &sc->plexes, plex, p2) {
 180                 if (p->flags & (GV_PLEX_REBUILDING | GV_PLEX_GROWING))
 181                         return (GV_ERR_ISBUSY);
 182         }
 183
 184         /* Then if not, we remove everything. */
 185         LIST_FOREACH_SAFE(s, &sc->subdisks, sd, s2)
 186                 gv_rm_sd(sc, s);
 187         LIST_FOREACH_SAFE(d, &sc->drives, drive, d2)
 188                 gv_rm_drive(sc, d, 0);
 189         LIST_FOREACH_SAFE(p, &sc->plexes, plex, p2)
 190                 gv_rm_plex(sc, p);
 191         LIST_FOREACH_SAFE(v, &sc->volumes, volume, v2)
 192                 gv_rm_vol(sc, v);
 193
 194         gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0);
 195
 196         return (0);
 197 }
 198
 199 /* Remove a volume. */
 200 void
 201 gv_rm_vol(struct gv_softc *sc, struct gv_volume *v)
 202 {
 203         struct g_provider *pp;
 204         struct gv_plex *p, *p2;
 205
 206         KASSERT(v != NULL, ("gv_rm_vol: NULL v"));
 207         pp = v->provider;
 208         KASSERT(pp != NULL, ("gv_rm_vol: NULL pp"));
 209
 210         /* Check if any of our consumers is open. */
 211         if (gv_provider_is_open(pp)) {
 212                 G_VINUM_DEBUG(0, "unable to remove %s: volume still in use",
 213                     v->name);
 214                 return;
 215         }
 216
 217         /* Remove the plexes our volume has. */
 218         LIST_FOREACH_SAFE(p, &v->plexes, in_volume, p2)
 219                 gv_rm_plex(sc, p);
 220
 221         /* Clean up. */
 222         LIST_REMOVE(v, volume);
 223         g_free(v);
 224
 225         /* Get rid of the volume's provider. */
 226         if (pp != NULL) {
 227                 g_topology_lock();
 228                 g_wither_provider(pp, ENXIO);
 229                 g_topology_unlock();
 230         }
 231 }
 232
 233 /* Remove a plex. */
 234 void
 235 gv_rm_plex(struct gv_softc *sc, struct gv_plex *p)
 236 {
 237         struct gv_volume *v;
 238         struct gv_sd *s, *s2;
 239
 240         KASSERT(p != NULL, ("gv_rm_plex: NULL p"));
 241         v = p->vol_sc;
 242
 243         /* Check if any of our consumers is open. */
 244         if (v != NULL && gv_provider_is_open(v->provider) && v->plexcount < 2) {
 245                 G_VINUM_DEBUG(0, "unable to remove %s: volume still in use",
 246                     p->name);
 247                 return;
 248         }
 249
 250         /* Remove the subdisks our plex has. */
 251         LIST_FOREACH_SAFE(s, &p->subdisks, in_plex, s2)
 252                 gv_rm_sd(sc, s);
 253
 254         v = p->vol_sc;
 255         /* Clean up and let our geom fade away. */
 256         LIST_REMOVE(p, plex);
 257         if (p->vol_sc != NULL) {
 258                 p->vol_sc->plexcount--;
 259                 LIST_REMOVE(p, in_volume);
 260                 p->vol_sc = NULL;
 261                 /* Correctly update the volume size. */
 262                 gv_update_vol_size(v, gv_vol_size(v));
 263         }
 264
 265         g_free(p);
 266 }
 267
 268 /* Remove a subdisk. */
 269 void
 270 gv_rm_sd(struct gv_softc *sc, struct gv_sd *s)
 271 {
 272         struct gv_plex *p;
 273         struct gv_volume *v;
 274
 275         KASSERT(s != NULL, ("gv_rm_sd: NULL s"));
 276
 277         p = s->plex_sc;
 278         v = NULL;
 279
 280         /* Clean up. */
 281         if (p != NULL) {
 282                 LIST_REMOVE(s, in_plex);
 283                 s->plex_sc = NULL;
 284                 p->sdcount--;
 285                 /* Update the plexsize. */
 286                 p->size = gv_plex_size(p);
 287                 v = p->vol_sc;
 288                 if (v != NULL) {
 289                         /* Update the size of our plex' volume. */
 290                         gv_update_vol_size(v, gv_vol_size(v));
 291                 }
 292         }
 293         if (s->drive_sc && !(s->drive_sc->flags & GV_DRIVE_REFERENCED))
 294                 LIST_REMOVE(s, from_drive);
 295         LIST_REMOVE(s, sd);
 296         gv_free_sd(s);
 297         g_free(s);
 298 }
 299
 300 /* Remove a drive. */
 301 void
 302 gv_rm_drive(struct gv_softc *sc, struct gv_drive *d, int flags)
 303 {
 304         struct g_consumer *cp;
 305         struct gv_freelist *fl, *fl2;
 306         struct gv_plex *p;
 307         struct gv_sd *s, *s2;
 308         struct gv_volume *v;
 309         struct gv_drive *d2;
 310         int err;
 311
 312         KASSERT(d != NULL, ("gv_rm_drive: NULL d"));
 313
 314         cp = d->consumer;
 315
 316         if (cp != NULL) {
 317                 g_topology_lock();
 318                 err = g_access(cp, 0, 1, 0);
 319                 g_topology_unlock();
 320
 321                 if (err) {
 322                         G_VINUM_DEBUG(0, "%s: unable to access '%s', "
 323                             "errno: %d", __func__, cp->provider->name, err);
 324                         return;
 325                 }
 326
 327                 /* Clear the Vinum Magic. */
 328                 d->hdr->magic = GV_NOMAGIC;
 329                 err = gv_write_header(cp, d->hdr);
 330                 if (err)
 331                         G_VINUM_DEBUG(0, "gv_rm_drive: error writing header to"
 332                             " '%s', errno: %d", cp->provider->name, err);
 333
 334                 g_topology_lock();
 335                 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
 336                 g_detach(cp);
 337                 g_destroy_consumer(cp);
 338                 g_topology_unlock();
 339         }
 340
 341         /* Remove all associated subdisks, plexes, volumes. */
 342         if (flags & GV_FLAG_R) {
 343                 if (!LIST_EMPTY(&d->subdisks)) {
 344                         LIST_FOREACH_SAFE(s, &d->subdisks, from_drive, s2) {
 345                                 p = s->plex_sc;
 346                                 if (p != NULL) {
 347                                         v = p->vol_sc;
 348                                         if (v != NULL)
 349                                                 gv_rm_vol(sc, v);
 350                                 }
 351                         }
 352                 }
 353         }
 354
 355         /* Clean up. */
 356         LIST_FOREACH_SAFE(fl, &d->freelist, freelist, fl2) {
 357                 LIST_REMOVE(fl, freelist);
 358                 g_free(fl);
 359         }
 360
 361         LIST_REMOVE(d, drive);
 362         g_free(d->hdr);
 363
 364         /* Put ourself into referenced state if we have subdisks. */
 365         if (d->sdcount > 0) {
 366                 d->consumer = NULL;
 367                 d->hdr = NULL;
 368                 d->flags |= GV_DRIVE_REFERENCED;
 369                 snprintf(d->device, sizeof(d->device), "???");
 370                 d->size = 0;
 371                 d->avail = 0;
 372                 d->freelist_entries = 0;
 373                 LIST_FOREACH(s, &d->subdisks, from_drive) {
 374                         s->flags |= GV_SD_TASTED;
 375                         gv_set_sd_state(s, GV_SD_DOWN, GV_SETSTATE_FORCE);
 376                 }
 377                 /* Shuffle around so we keep gv_is_newer happy. */
 378                 LIST_REMOVE(d, drive);
 379                 d2 = LIST_FIRST(&sc->drives);
 380                 if (d2 == NULL)
 381                         LIST_INSERT_HEAD(&sc->drives, d, drive);
 382                 else
 383                         LIST_INSERT_AFTER(d2, d, drive);
 384                 return;
 385         }
 386         g_free(d);
 387
 388         gv_save_config(sc);
 389 }