geom_vinum_rm.c

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    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/geom_dbg.h>
   39 #include <geom/vinum/geom_vinum_var.h>
   40 #include <geom/vinum/geom_vinum.h>
   41 
   42 /* General 'remove' routine. */
   43 void
   44 gv_remove(struct g_geom *gp, struct gctl_req *req)
   45 {
   46         struct gv_softc *sc;
   47         struct gv_volume *v;
   48         struct gv_plex *p;
   49         struct gv_sd *s;
   50         struct gv_drive *d;
   51         int *argc, *flags;
   52         char *argv, buf[20];
   53         int i, type;
   54 
   55         argc = gctl_get_paraml(req, "argc", sizeof(*argc));
   56 
   57         if (argc == NULL || *argc == 0) {
   58                 gctl_error(req, "no arguments given");
   59                 return;
   60         }
   61 
   62         flags = gctl_get_paraml(req, "flags", sizeof(*flags));
   63         if (flags == NULL) {
   64                 gctl_error(req, "no flags given");
   65                 return;
   66         }
   67 
   68         sc = gp->softc;
   69 
   70         /* XXX config locking */
   71 
   72         for (i = 0; i < *argc; i++) {
   73                 snprintf(buf, sizeof(buf), "argv%d", i);
   74                 argv = gctl_get_param(req, buf, NULL);
   75                 if (argv == NULL)
   76                         continue;
   77                 type = gv_object_type(sc, argv);
   78                 switch (type) {
   79                 case GV_TYPE_VOL:
   80                         v = gv_find_vol(sc, argv);
   81 
   82                         /*
   83                          * If this volume has plexes, we want a recursive
   84                          * removal.
   85                          */
   86                         if (!LIST_EMPTY(&v->plexes) && !(*flags & GV_FLAG_R)) {
   87                                 gctl_error(req, "volume '%s' has attached "
   88                                     "plexes - need recursive removal", v->name);
   89                                 return;
   90                         }
   91 
   92                         gv_post_event(sc, GV_EVENT_RM_VOLUME, v, NULL, 0, 0);
   93                         break;
   94 
   95                 case GV_TYPE_PLEX:
   96                         p = gv_find_plex(sc, argv);
   97 
   98                         /*
   99                          * If this plex has subdisks, we want a recursive
  100                          * removal.
  101                          */
  102                         if (!LIST_EMPTY(&p->subdisks) &&
  103                             !(*flags & GV_FLAG_R)) {
  104                                 gctl_error(req, "plex '%s' has attached "
  105                                     "subdisks - need recursive removal",
  106                                     p->name);
  107                                 return;
  108                         }
  109 
  110                         /* Don't allow removal of the only plex of a volume. */
  111                         if (p->vol_sc != NULL && p->vol_sc->plexcount == 1) {
  112                                 gctl_error(req, "plex '%s' is still attached "
  113                                     "to volume '%s'", p->name, p->volume);
  114                                 return;
  115                         }
  116 
  117                         gv_post_event(sc, GV_EVENT_RM_PLEX, p, NULL, 0, 0);
  118                         break;
  119 
  120                 case GV_TYPE_SD:
  121                         s = gv_find_sd(sc, argv);
  122 
  123                         /* Don't allow removal if attached to a plex. */
  124                         if (s->plex_sc != NULL) {
  125                                 gctl_error(req, "subdisk '%s' is still attached"
  126                                     " to plex '%s'", s->name, s->plex_sc->name);
  127                                 return;
  128                         }
  129 
  130                         gv_post_event(sc, GV_EVENT_RM_SD, s, NULL, 0, 0);
  131                         break;
  132 
  133                 case GV_TYPE_DRIVE:
  134                         d = gv_find_drive(sc, argv);
  135                         /* We don't allow to remove open drives. */
  136                         if (gv_consumer_is_open(d->consumer) &&
  137                             !(*flags & GV_FLAG_F)) {
  138                                 gctl_error(req, "drive '%s' is open", d->name);
  139                                 return;
  140                         }
  141 
  142                         /* A drive with subdisks needs a recursive removal. */
  143 /*                      if (!LIST_EMPTY(&d->subdisks) &&
  144                             !(*flags & GV_FLAG_R)) {
  145                                 gctl_error(req, "drive '%s' still has subdisks"
  146                                     " - need recursive removal", d->name);
  147                                 return;
  148                         }*/
  149 
  150                         gv_post_event(sc, GV_EVENT_RM_DRIVE, d, NULL, *flags,
  151                             0);
  152                         break;
  153 
  154                 default:
  155                         gctl_error(req, "unknown object '%s'", argv);
  156                         return;
  157                 }
  158         }
  159 
  160         gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0);
  161 }
  162 
  163 /* Resets configuration */
  164 int
  165 gv_resetconfig(struct gv_softc *sc)
  166 {
  167         struct gv_drive *d, *d2;
  168         struct gv_volume *v, *v2;
  169         struct gv_plex *p, *p2;
  170         struct gv_sd *s, *s2;
  171 
  172         /* First make sure nothing is open. */
  173         LIST_FOREACH_SAFE(d, &sc->drives, drive, d2) {
  174                 if (gv_consumer_is_open(d->consumer)) {
  175                         return (GV_ERR_ISBUSY);
  176                 }
  177         }
  178 
  179         /* Make sure nothing is going on internally. */
  180         LIST_FOREACH_SAFE(p, &sc->plexes, plex, p2) {
  181                 if (p->flags & (GV_PLEX_REBUILDING | GV_PLEX_GROWING))
  182                         return (GV_ERR_ISBUSY);
  183         }
  184 
  185         /* Then if not, we remove everything. */
  186         LIST_FOREACH_SAFE(s, &sc->subdisks, sd, s2)
  187                 gv_rm_sd(sc, s);
  188         LIST_FOREACH_SAFE(d, &sc->drives, drive, d2)
  189                 gv_rm_drive(sc, d, 0);
  190         LIST_FOREACH_SAFE(p, &sc->plexes, plex, p2)
  191                 gv_rm_plex(sc, p);
  192         LIST_FOREACH_SAFE(v, &sc->volumes, volume, v2)
  193                 gv_rm_vol(sc, v);
  194 
  195         gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0);
  196 
  197         return (0);
  198 }
  199 
  200 /* Remove a volume. */
  201 void
  202 gv_rm_vol(struct gv_softc *sc, struct gv_volume *v)
  203 {
  204         struct g_provider *pp;
  205         struct gv_plex *p, *p2;
  206 
  207         KASSERT(v != NULL, ("gv_rm_vol: NULL v"));
  208         pp = v->provider;
  209         KASSERT(pp != NULL, ("gv_rm_vol: NULL pp"));
  210 
  211         /* Check if any of our consumers is open. */
  212         if (gv_provider_is_open(pp)) {
  213                 G_VINUM_DEBUG(0, "unable to remove %s: volume still in use",
  214                     v->name);
  215                 return;
  216         }
  217 
  218         /* Remove the plexes our volume has. */
  219         LIST_FOREACH_SAFE(p, &v->plexes, in_volume, p2)
  220                 gv_rm_plex(sc, p);
  221 
  222         /* Clean up. */
  223         LIST_REMOVE(v, volume);
  224         g_free(v);
  225 
  226         /* Get rid of the volume's provider. */
  227         if (pp != NULL) {
  228                 g_topology_lock();
  229                 g_wither_provider(pp, ENXIO);
  230                 g_topology_unlock();
  231         }
  232 }
  233 
  234 /* Remove a plex. */
  235 void
  236 gv_rm_plex(struct gv_softc *sc, struct gv_plex *p)
  237 {
  238         struct gv_volume *v;
  239         struct gv_sd *s, *s2;
  240 
  241         KASSERT(p != NULL, ("gv_rm_plex: NULL p"));
  242         v = p->vol_sc;
  243 
  244         /* Check if any of our consumers is open. */
  245         if (v != NULL && gv_provider_is_open(v->provider) && v->plexcount < 2) {
  246                 G_VINUM_DEBUG(0, "unable to remove %s: volume still in use",
  247                     p->name);
  248                 return;
  249         }
  250 
  251         /* Remove the subdisks our plex has. */
  252         LIST_FOREACH_SAFE(s, &p->subdisks, in_plex, s2)
  253                 gv_rm_sd(sc, s);
  254 
  255         v = p->vol_sc;
  256         /* Clean up and let our geom fade away. */
  257         LIST_REMOVE(p, plex);
  258         if (p->vol_sc != NULL) {
  259                 p->vol_sc->plexcount--;
  260                 LIST_REMOVE(p, in_volume);
  261                 p->vol_sc = NULL;
  262                 /* Correctly update the volume size. */
  263                 gv_update_vol_size(v, gv_vol_size(v));
  264         }
  265 
  266         g_free(p);
  267 }
  268 
  269 /* Remove a subdisk. */
  270 void
  271 gv_rm_sd(struct gv_softc *sc, struct gv_sd *s)
  272 {
  273         struct gv_plex *p;
  274         struct gv_volume *v;
  275 
  276         KASSERT(s != NULL, ("gv_rm_sd: NULL s"));
  277 
  278         p = s->plex_sc;
  279         v = NULL;
  280 
  281         /* Clean up. */
  282         if (p != NULL) {
  283                 LIST_REMOVE(s, in_plex);
  284                 s->plex_sc = NULL;
  285                 p->sdcount--;
  286                 /* Update the plexsize. */
  287                 p->size = gv_plex_size(p);
  288                 v = p->vol_sc;
  289                 if (v != NULL) {
  290                         /* Update the size of our plex' volume. */
  291                         gv_update_vol_size(v, gv_vol_size(v));
  292                 }
  293         }
  294         if (s->drive_sc && !(s->drive_sc->flags & GV_DRIVE_REFERENCED))
  295                 LIST_REMOVE(s, from_drive);
  296         LIST_REMOVE(s, sd);
  297         gv_free_sd(s);
  298         g_free(s);
  299 }
  300 
  301 /* Remove a drive. */
  302 void
  303 gv_rm_drive(struct gv_softc *sc, struct gv_drive *d, int flags)
  304 {
  305         struct g_consumer *cp;
  306         struct gv_freelist *fl, *fl2;
  307         struct gv_plex *p;
  308         struct gv_sd *s, *s2;
  309         struct gv_volume *v;
  310         struct gv_drive *d2;
  311         int err;
  312 
  313         KASSERT(d != NULL, ("gv_rm_drive: NULL d"));
  314 
  315         cp = d->consumer;
  316 
  317         if (cp != NULL) {
  318                 g_topology_lock();
  319                 err = g_access(cp, 0, 1, 0);
  320                 g_topology_unlock();
  321 
  322                 if (err) {
  323                         G_VINUM_DEBUG(0, "%s: unable to access '%s', "
  324                             "errno: %d", __func__, cp->provider->name, err);
  325                         return;
  326                 }
  327 
  328                 /* Clear the Vinum Magic. */
  329                 d->hdr->magic = GV_NOMAGIC;
  330                 err = gv_write_header(cp, d->hdr);
  331                 if (err)
  332                         G_VINUM_DEBUG(0, "gv_rm_drive: error writing header to"
  333                             " '%s', errno: %d", cp->provider->name, err);
  334 
  335                 g_topology_lock();
  336                 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
  337                 g_detach(cp);
  338                 g_destroy_consumer(cp);
  339                 g_topology_unlock();
  340         }
  341 
  342         /* Remove all associated subdisks, plexes, volumes. */
  343         if (flags & GV_FLAG_R) {
  344                 if (!LIST_EMPTY(&d->subdisks)) {
  345                         LIST_FOREACH_SAFE(s, &d->subdisks, from_drive, s2) {
  346                                 p = s->plex_sc;
  347                                 if (p != NULL) {
  348                                         v = p->vol_sc;
  349                                         if (v != NULL)
  350                                                 gv_rm_vol(sc, v);
  351                                 }
  352                         }
  353                 }
  354         }
  355 
  356         /* Clean up. */
  357         LIST_FOREACH_SAFE(fl, &d->freelist, freelist, fl2) {
  358                 LIST_REMOVE(fl, freelist);
  359                 g_free(fl);
  360         }
  361 
  362         LIST_REMOVE(d, drive);
  363         g_free(d->hdr);
  364 
  365         /* Put ourself into referenced state if we have subdisks. */
  366         if (d->sdcount > 0) {
  367                 d->consumer = NULL;
  368                 d->hdr = NULL;
  369                 d->flags |= GV_DRIVE_REFERENCED;
  370                 snprintf(d->device, sizeof(d->device), "???");
  371                 d->size = 0;
  372                 d->avail = 0;
  373                 d->freelist_entries = 0;
  374                 LIST_FOREACH(s, &d->subdisks, from_drive) {
  375                         s->flags |= GV_SD_TASTED;
  376                         gv_set_sd_state(s, GV_SD_DOWN, GV_SETSTATE_FORCE);
  377                 }
  378                 /* Shuffle around so we keep gv_is_newer happy. */
  379                 LIST_REMOVE(d, drive);
  380                 d2 = LIST_FIRST(&sc->drives);
  381                 if (d2 == NULL)
  382                         LIST_INSERT_HEAD(&sc->drives, d, drive);
  383                 else
  384                         LIST_INSERT_AFTER(d2, d, drive);
  385                 return;
  386         }
  387         g_free(d);
  388 
  389         gv_save_config(sc);
  390 }
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FreeBSD/Linux Kernel Cross Reference sys/geom/vinum/geom_vinum_rm.c

FreeBSD/Linux Kernel Cross Reference
sys/geom/vinum/geom_vinum_rm.c
