geom_vinum_rename.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_rename_drive(struct gv_softc *, struct gctl_req *,
   46                     struct gv_drive *, char *, int);
   47 static int      gv_rename_plex(struct gv_softc *, struct gctl_req *,
   48                     struct gv_plex *, char *, int);
   49 static int      gv_rename_sd(struct gv_softc *, struct gctl_req *,
   50                     struct gv_sd *, char *, int);
   51 static int      gv_rename_vol(struct gv_softc *, struct gctl_req *,
   52                     struct gv_volume *, char *, int);
   53 
   54 void
   55 gv_rename(struct g_geom *gp, struct gctl_req *req)
   56 {
   57         struct gv_softc *sc;
   58         struct gv_volume *v;
   59         struct gv_plex *p;
   60         struct gv_sd *s;
   61         struct gv_drive *d;
   62         char *newname, *object;
   63         int err, *flags, type;
   64 
   65         sc = gp->softc;
   66 
   67         flags = gctl_get_paraml(req, "flags", sizeof(*flags));
   68 
   69         newname = gctl_get_param(req, "newname", NULL);
   70         if (newname == NULL) {
   71                 gctl_error(req, "no new name given");
   72                 return;
   73         }
   74 
   75         object = gctl_get_param(req, "object", NULL);
   76         if (object == NULL) {
   77                 gctl_error(req, "no object given");
   78                 return;
   79         }
   80 
   81         type = gv_object_type(sc, object);
   82         switch (type) {
   83         case GV_TYPE_VOL:
   84                 v = gv_find_vol(sc, object);
   85                 if (v == NULL)  {
   86                         gctl_error(req, "unknown volume '%s'", object);
   87                         return;
   88                 }
   89                 err = gv_rename_vol(sc, req, v, newname, *flags);
   90                 if (err)
   91                         return;
   92                 break;
   93         case GV_TYPE_PLEX:
   94                 p = gv_find_plex(sc, object);
   95                 if (p == NULL) {
   96                         gctl_error(req, "unknown plex '%s'", object);
   97                         return;
   98                 }
   99                 err = gv_rename_plex(sc, req, p, newname, *flags);
  100                 if (err)
  101                         return;
  102                 break;
  103         case GV_TYPE_SD:
  104                 s = gv_find_sd(sc, object);
  105                 if (s == NULL) {
  106                         gctl_error(req, "unknown subdisk '%s'", object);
  107                         return;
  108                 }
  109                 err = gv_rename_sd(sc, req, s, newname, *flags);
  110                 if (err)
  111                         return;
  112                 break;
  113         case GV_TYPE_DRIVE:
  114                 d = gv_find_drive(sc, object);
  115                 if (d == NULL) {
  116                         gctl_error(req, "unknown drive '%s'", object);
  117                         return;
  118                 }
  119                 err = gv_rename_drive(sc, req, d, newname, *flags);
  120                 if (err)
  121                         return;
  122                 break;
  123         default:
  124                 gctl_error(req, "unknown object '%s'", object);
  125                 return;
  126         }
  127 
  128         gv_save_config_all(sc);
  129 }
  130 
  131 static int
  132 gv_rename_drive(struct gv_softc *sc, struct gctl_req *req, struct gv_drive *d, char *newname, int flags)
  133 {
  134         struct gv_sd *s;
  135 
  136         g_topology_assert();
  137         KASSERT(d != NULL, ("gv_rename_drive: NULL d"));
  138 
  139         if (gv_object_type(sc, newname) != -1) {
  140                 gctl_error(req, "drive name '%s' already in use", newname);
  141                 return (-1);
  142         }
  143 
  144         strncpy(d->name, newname, GV_MAXDRIVENAME);
  145         strncpy(d->hdr->label.name, newname, GV_MAXDRIVENAME);
  146 
  147         /* XXX can we rename providers here? */
  148 
  149         LIST_FOREACH(s, &d->subdisks, from_drive)
  150                 strncpy(s->drive, d->name, GV_MAXDRIVENAME);
  151 
  152         return (0);
  153 }
  154 
  155 static int      
  156 gv_rename_plex(struct gv_softc *sc, struct gctl_req *req, struct gv_plex *p, char *newname, int flags)
  157 {
  158         struct gv_sd *s;
  159         char *plexnum, *plexnump, *oldplex, *oldplexp;
  160         char *newsd, *oldsd, *oldsdp;
  161         int err;
  162 
  163         g_topology_assert();
  164         KASSERT(p != NULL, ("gv_rename_plex: NULL p"));
  165 
  166         err = 0;
  167 
  168         if (gv_object_type(sc, newname) != -1) {
  169                 gctl_error(req, "plex name '%s' already in use", newname);
  170                 return (-1);
  171         }
  172 
  173         /* Needed for sanity checking. */
  174         plexnum = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
  175         strncpy(plexnum, newname, GV_MAXPLEXNAME);
  176         plexnump = plexnum;
  177 
  178         oldplex = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
  179         strncpy(oldplex, p->name, GV_MAXPLEXNAME);
  180         oldplexp = oldplex;
  181 
  182         /*
  183          * Locate the plex number part of the plex names.
  184          *
  185          * XXX: can we be sure that the current plex name has the format
  186          * 'foo.pX'?
  187          */
  188         strsep(&oldplexp, ".");
  189         strsep(&plexnump, ".");
  190         if (plexnump == NULL || *plexnump == '\0') {
  191                 gctl_error(req, "proposed plex name '%s' is not a valid plex "
  192                     "name", newname);
  193                 err = -1;
  194                 goto failure;
  195         }
  196         if (strcmp(oldplexp, plexnump)) {
  197                 gctl_error(req, "current and proposed plex numbers (%s, %s) "
  198                     "do not match", plexnump, oldplexp);
  199                 err = -1;
  200                 goto failure;
  201         }
  202 
  203         strncpy(p->name, newname, GV_MAXPLEXNAME);
  204 
  205         /* XXX can we rename providers here? */
  206 
  207         /* Fix up references and potentially rename subdisks. */
  208         LIST_FOREACH(s, &p->subdisks, in_plex) {
  209                 strncpy(s->plex, p->name, GV_MAXPLEXNAME);
  210                 if (flags && GV_FLAG_R) {
  211                         newsd = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
  212                         oldsd = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
  213                         oldsdp = oldsd;
  214                         strncpy(oldsd, s->name, GV_MAXSDNAME);
  215                         /*
  216                          * XXX: can we be sure that the current sd name has the
  217                          * format 'foo.pX.sY'?
  218                          */
  219                         strsep(&oldsdp, ".");
  220                         strsep(&oldsdp, ".");
  221                         snprintf(newsd, GV_MAXSDNAME, "%s.%s", p->name, oldsdp);
  222                         err = gv_rename_sd(sc, req, s, newsd, flags);
  223                         g_free(newsd);
  224                         g_free(oldsd);
  225                         if (err)
  226                                 goto failure;
  227                 }
  228         }
  229 
  230 failure:
  231         g_free(plexnum);
  232         g_free(oldplex);
  233 
  234         return (err);
  235 }
  236 
  237 /*
  238  * gv_rename_sd: renames a subdisk.  Note that the 'flags' argument is ignored,
  239  * since there are no structures below a subdisk.  Similarly, we don't have to
  240  * clean up any references elsewhere to the subdisk's name.
  241  */
  242 static int
  243 gv_rename_sd(struct gv_softc *sc, struct gctl_req *req, struct gv_sd *s, char * newname, int flags)
  244 {
  245         char *new, *newp, *old, *oldp;
  246         int err;
  247 
  248         g_topology_assert();
  249         KASSERT(s != NULL, ("gv_rename_sd: NULL s"));
  250 
  251         err = 0;
  252 
  253         if (gv_object_type(sc, newname) != -1) {
  254                 gctl_error(req, "subdisk name %s already in use", newname);
  255                 return (-1);
  256         }
  257 
  258         /* Needed for sanity checking. */
  259         new = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
  260         strncpy(new, newname, GV_MAXSDNAME);
  261         newp = new;
  262 
  263         old = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
  264         strncpy(old, s->name, GV_MAXSDNAME);
  265         oldp = old;
  266 
  267         /*
  268          * Locate the sd number part of the sd names.
  269          *
  270          * XXX: can we be sure that the current sd name has the format
  271          * 'foo.pX.sY'?
  272          */
  273         strsep(&oldp, ".");
  274         strsep(&oldp, ".");
  275         strsep(&newp, ".");
  276         if (newp == NULL || *newp == '\0') {
  277                 gctl_error(req, "proposed sd name '%s' is not a valid sd name",
  278                     newname);
  279                 err = -1;
  280                 goto fail;
  281         }
  282         strsep(&newp, ".");
  283         if (newp == NULL || *newp == '\0') {
  284                 gctl_error(req, "proposed sd name '%s' is not a valid sd name",
  285                     newname);
  286                 err = -1;
  287                 goto fail;
  288         }
  289         if (strcmp(newp, oldp)) {
  290                 gctl_error(req, "current and proposed sd numbers (%s, %s) do "
  291                     "not match", oldp, newp);
  292                 err = -1;
  293                 goto fail;
  294         }
  295 
  296         strncpy(s->name, newname, GV_MAXSDNAME);
  297 
  298         /* XXX: can we rename providers here? */
  299 
  300 fail:
  301         g_free(new);
  302         g_free(old);
  303 
  304         return (err);
  305 }
  306 
  307 static int
  308 gv_rename_vol(struct gv_softc *sc, struct gctl_req *req, struct gv_volume *v, char *newname, int flags)
  309 {
  310         struct gv_plex *p;
  311         char *new, *old, *oldp;
  312         int err;
  313 
  314         g_topology_assert();
  315         KASSERT(v != NULL, ("gv_rename_vol: NULL v"));
  316 
  317         if (gv_object_type(sc, newname) != -1) {
  318                 gctl_error(req, "volume name %s already in use", newname);
  319                 return (-1);
  320         }
  321 
  322         /* Rename the volume. */
  323         strncpy(v->name, newname, GV_MAXVOLNAME);
  324 
  325         /* Fix up references and potentially rename plexes. */
  326         LIST_FOREACH(p, &v->plexes, in_volume) {
  327                 strncpy(p->volume, v->name, GV_MAXVOLNAME);
  328                 if (flags && GV_FLAG_R) {
  329                         new = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
  330                         old = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
  331                         oldp = old;
  332                         strncpy(old, p->name, GV_MAXPLEXNAME);
  333                         /*
  334                          * XXX: can we be sure that the current plex name has
  335                          * the format 'foo.pX'?
  336                          */
  337                         strsep(&oldp, ".");
  338                         snprintf(new, GV_MAXPLEXNAME, "%s.%s", v->name, oldp);
  339                         err = gv_rename_plex(sc, req, p, new, flags);
  340                         g_free(new);
  341                         g_free(old);
  342                         if (err)
  343                                 return (err);
  344                 }
  345         }
  346 
  347         return (0);
  348 }
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FreeBSD/Linux Kernel Cross Reference sys/geom/vinum/geom_vinum_rename.c

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