geom_vinum_move.c

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    1 /*-
    2  *  Copyright (c) 2005 Chris Jones
    3  *  All rights reserved.
    4  *
    5  * This software was developed for the FreeBSD Project by Chris Jones
    6  * thanks to the support of Google's Summer of Code program and
    7  * mentoring by Lukas Ertl.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 #include <sys/param.h>
   36 #include <sys/libkern.h>
   37 #include <sys/kernel.h>
   38 #include <sys/malloc.h>
   39 
   40 #include <geom/geom.h>
   41 #include <geom/vinum/geom_vinum_var.h>
   42 #include <geom/vinum/geom_vinum.h>
   43 #include <geom/vinum/geom_vinum_share.h>
   44 
   45 static int      gv_move_sd(struct gv_softc *, struct gctl_req *,
   46                     struct gv_sd *, char *, int);
   47 
   48 void
   49 gv_move(struct g_geom *gp, struct gctl_req *req)
   50 {
   51         struct gv_softc *sc;
   52         struct gv_sd *s;
   53         char buf[20], *destination, *object;
   54         int *argc, err, *flags, i, type;
   55 
   56         sc = gp->softc;
   57 
   58         argc = gctl_get_paraml(req, "argc", sizeof(*argc));
   59         flags = gctl_get_paraml(req, "flags", sizeof(*flags));
   60         destination = gctl_get_param(req, "destination", NULL);
   61         if (destination == NULL) {
   62                 gctl_error(req, "no destination given");
   63                 return;
   64         }
   65         if (gv_object_type(sc, destination) != GV_TYPE_DRIVE) {
   66                 gctl_error(req, "destination '%s' is not a drive", destination);
   67                 return;
   68         }
   69 
   70         /*
   71          * We start with 1 here, because argv[0] on the command line is the
   72          * destination drive.
   73          */
   74         for (i = 1; i < *argc; i++) {
   75                 snprintf(buf, sizeof(buf), "argv%d", i);
   76                 object = gctl_get_param(req, buf, NULL);
   77                 if (object == NULL)
   78                         continue;
   79 
   80                 type = gv_object_type(sc, object);
   81                 if (type != GV_TYPE_SD) {
   82                         gctl_error(req, "you can only move subdisks; "
   83                             "'%s' isn't one", object);
   84                         return;
   85                 }
   86 
   87                 s = gv_find_sd(sc, object);
   88                 if (s == NULL) {
   89                         gctl_error(req, "unknown subdisk '%s'", object);
   90                         return;
   91                 }
   92                 err = gv_move_sd(sc, req, s, destination, *flags);
   93                 if (err)
   94                         return;
   95         }
   96 
   97         gv_save_config_all(sc);
   98 }
   99 
  100 /* Move a subdisk. */
  101 static int
  102 gv_move_sd(struct gv_softc *sc, struct gctl_req *req, struct gv_sd *cursd, char *destination, int flags)
  103 {
  104         struct gv_drive *d;
  105         struct gv_sd *newsd, *s, *s2;
  106         struct gv_plex *p;
  107         struct g_consumer *cp;
  108         char errstr[ERRBUFSIZ];
  109         int err;
  110 
  111         g_topology_assert();
  112         KASSERT(cursd != NULL, ("gv_move_sd: NULL cursd"));
  113 
  114         cp = cursd->consumer;
  115 
  116         if (cp != NULL && (cp->acr || cp->acw || cp->ace)) {
  117                 gctl_error(req, "subdisk '%s' is busy", cursd->name);
  118                 return (-1);
  119         }
  120 
  121         if (!(flags && GV_FLAG_F)) {
  122                 gctl_error(req, "-f flag not passed; move would be "
  123                     "destructive");
  124                 return (-1);
  125         }
  126 
  127         d = gv_find_drive(sc, destination);
  128         if (d == NULL) {
  129                 gctl_error(req, "destination drive '%s' not found",
  130                     destination);
  131                 return (-1);
  132         }
  133 
  134         if (d == cursd->drive_sc) {
  135                 gctl_error(req, "subdisk '%s' already on drive '%s'",
  136                     cursd->name, destination);
  137                 return (-1);
  138         }
  139 
  140         /* XXX: Does it have to be part of a plex? */
  141         p = gv_find_plex(sc, cursd->plex);
  142         if (p == NULL) {
  143                 gctl_error(req, "subdisk '%s' is not part of a plex",
  144                     cursd->name);
  145                 return (-1);
  146         }
  147         
  148         /* Stale the old subdisk. */
  149         err = gv_set_sd_state(cursd, GV_SD_STALE,
  150             GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG);
  151         if (err) {
  152                 gctl_error(req, "could not set the subdisk '%s' to state "
  153                     "'stale'", cursd->name);
  154                 return (err);
  155         }
  156 
  157         /*
  158          * Create new subdisk. Ideally, we'd use gv_new_sd, but that requires
  159          * us to create a string for it to parse, which is silly.
  160          * TODO: maybe refactor gv_new_sd such that this is no longer the case.
  161          */
  162         newsd = g_malloc(sizeof(struct gv_sd), M_WAITOK | M_ZERO);
  163         newsd->plex_offset = cursd->plex_offset;
  164         newsd->size = cursd->size;
  165         newsd->drive_offset = -1;
  166         strncpy(newsd->name, cursd->name, GV_MAXSDNAME);
  167         strncpy(newsd->drive, destination, GV_MAXDRIVENAME);
  168         strncpy(newsd->plex, cursd->plex, GV_MAXPLEXNAME);
  169         newsd->state = GV_SD_STALE;
  170         newsd->vinumconf = cursd->vinumconf;
  171 
  172         err = gv_sd_to_drive(sc, d, newsd, errstr, ERRBUFSIZ);
  173         if (err) {
  174                 /* XXX not enough free space? */
  175                 gctl_error(req, errstr);
  176                 g_free(newsd);
  177                 return (err);
  178         }
  179 
  180         /* Replace the old sd by the new one. */
  181         if (cp != NULL)
  182                 g_detach(cp);
  183         LIST_FOREACH_SAFE(s, &p->subdisks, in_plex, s2) {
  184                 if (s == cursd) {
  185                         p->sdcount--;
  186                         p->size -= s->size;
  187                         err = gv_rm_sd(sc, req, s, 0);
  188                         if (err)
  189                                 return (err);
  190                         
  191                 }
  192         }
  193 
  194         gv_sd_to_plex(p, newsd, 1);
  195 
  196         /* Creates the new providers.... */
  197         gv_drive_modify(d);
  198 
  199         /* And reconnect the consumer ... */
  200         if (cp != NULL) {
  201                 newsd->consumer = cp;
  202                 err = g_attach(cp, newsd->provider);
  203                 if (err) {
  204                         g_destroy_consumer(cp);
  205                         gctl_error(req, "proposed move would create a loop "
  206                             "in GEOM config");
  207                         return (err);
  208                 }
  209         }
  210 
  211         LIST_INSERT_HEAD(&sc->subdisks, newsd, sd);
  212 
  213         gv_save_config_all(sc);
  214 
  215         return (0);
  216 }

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

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