geom_vinum_move.c

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

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

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sys/geom/vinum/geom_vinum_move.c