g_raid_ctl.c

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    1 /*-
    2  * Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/9.1/sys/geom/raid/g_raid_ctl.c 235874 2012-05-24 02:34:03Z mav $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/kernel.h>
   33 #include <sys/module.h>
   34 #include <sys/lock.h>
   35 #include <sys/mutex.h>
   36 #include <sys/bio.h>
   37 #include <sys/sysctl.h>
   38 #include <sys/malloc.h>
   39 #include <sys/bitstring.h>
   40 #include <vm/uma.h>
   41 #include <machine/atomic.h>
   42 #include <geom/geom.h>
   43 #include <sys/proc.h>
   44 #include <sys/kthread.h>
   45 #include <geom/raid/g_raid.h>
   46 #include "g_raid_md_if.h"
   47 
   48 
   49 static struct g_raid_softc *
   50 g_raid_find_node(struct g_class *mp, const char *name)
   51 {
   52         struct g_raid_softc *sc;
   53         struct g_geom *gp;
   54 
   55         LIST_FOREACH(gp, &mp->geom, geom) {
   56                 sc = gp->softc;
   57                 if (sc == NULL)
   58                         continue;
   59                 if (sc->sc_stopping != 0)
   60                         continue;
   61                 if (strcasecmp(sc->sc_name, name) == 0)
   62                         return (sc);
   63         }
   64         return (NULL);
   65 }
   66 
   67 static void
   68 g_raid_ctl_label(struct gctl_req *req, struct g_class *mp)
   69 {
   70         struct g_geom *geom;
   71         struct g_raid_softc *sc;
   72         const char *format;
   73         int *nargs;
   74         int crstatus, ctlstatus;
   75         char buf[64];
   76 
   77         nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
   78         if (nargs == NULL) {
   79                 gctl_error(req, "No '%s' argument.", "nargs");
   80                 return;
   81         }
   82         if (*nargs < 4) {
   83                 gctl_error(req, "Invalid number of arguments.");
   84                 return;
   85         }
   86         format = gctl_get_asciiparam(req, "arg0");
   87         if (format == NULL) {
   88                 gctl_error(req, "No format recieved.");
   89                 return;
   90         }
   91         crstatus = g_raid_create_node_format(format, req, &geom);
   92         if (crstatus == G_RAID_MD_TASTE_FAIL) {
   93                 gctl_error(req, "Failed to create array with format '%s'.",
   94                     format);
   95                 return;
   96         }
   97         sc = (struct g_raid_softc *)geom->softc;
   98         g_topology_unlock();
   99         sx_xlock(&sc->sc_lock);
  100         ctlstatus = G_RAID_MD_CTL(sc->sc_md, req);
  101         if (ctlstatus < 0) {
  102                 gctl_error(req, "Command failed: %d.", ctlstatus);
  103                 if (crstatus == G_RAID_MD_TASTE_NEW)
  104                         g_raid_destroy_node(sc, 0);
  105         } else {
  106                 if (crstatus == G_RAID_MD_TASTE_NEW)
  107                         snprintf(buf, sizeof(buf), "%s created\n", sc->sc_name);
  108                 else
  109                         snprintf(buf, sizeof(buf), "%s reused\n", sc->sc_name);
  110                 gctl_set_param_err(req, "output", buf, strlen(buf) + 1);
  111         }
  112         sx_xunlock(&sc->sc_lock);
  113         g_topology_lock();
  114 }
  115 
  116 static void
  117 g_raid_ctl_stop(struct gctl_req *req, struct g_class *mp)
  118 {
  119         struct g_raid_softc *sc;
  120         const char *nodename;
  121         int *nargs, *force;
  122         int error, how;
  123 
  124         nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
  125         if (nargs == NULL) {
  126                 gctl_error(req, "No '%s' argument.", "nargs");
  127                 return;
  128         }
  129         if (*nargs != 1) {
  130                 gctl_error(req, "Invalid number of arguments.");
  131                 return;
  132         }
  133         nodename = gctl_get_asciiparam(req, "arg0");
  134         if (nodename == NULL) {
  135                 gctl_error(req, "No array name recieved.");
  136                 return;
  137         }
  138         sc = g_raid_find_node(mp, nodename);
  139         if (sc == NULL) {
  140                 gctl_error(req, "Array '%s' not found.", nodename);
  141                 return;
  142         }
  143         force = gctl_get_paraml(req, "force", sizeof(*force));
  144         if (force != NULL && *force)
  145                 how = G_RAID_DESTROY_HARD;
  146         else
  147                 how = G_RAID_DESTROY_SOFT;
  148         g_topology_unlock();
  149         sx_xlock(&sc->sc_lock);
  150         error = g_raid_destroy(sc, how);
  151         if (error != 0)
  152                 sx_xunlock(&sc->sc_lock);
  153         g_topology_lock();
  154 }
  155 
  156 static void
  157 g_raid_ctl_other(struct gctl_req *req, struct g_class *mp)
  158 {
  159         struct g_raid_softc *sc;
  160         const char *nodename;
  161         int *nargs;
  162         int ctlstatus;
  163 
  164         nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
  165         if (nargs == NULL) {
  166                 gctl_error(req, "No '%s' argument.", "nargs");
  167                 return;
  168         }
  169         if (*nargs < 1) {
  170                 gctl_error(req, "Invalid number of arguments.");
  171                 return;
  172         }
  173         nodename = gctl_get_asciiparam(req, "arg0");
  174         if (nodename == NULL) {
  175                 gctl_error(req, "No array name recieved.");
  176                 return;
  177         }
  178         sc = g_raid_find_node(mp, nodename);
  179         if (sc == NULL) {
  180                 gctl_error(req, "Array '%s' not found.", nodename);
  181                 return;
  182         }
  183         g_topology_unlock();
  184         sx_xlock(&sc->sc_lock);
  185         if (sc->sc_md != NULL) {
  186                 ctlstatus = G_RAID_MD_CTL(sc->sc_md, req);
  187                 if (ctlstatus < 0)
  188                         gctl_error(req, "Command failed: %d.", ctlstatus);
  189         }
  190         sx_xunlock(&sc->sc_lock);
  191         g_topology_lock();
  192 }
  193 
  194 void
  195 g_raid_ctl(struct gctl_req *req, struct g_class *mp, const char *verb)
  196 {
  197         uint32_t *version;
  198 
  199         g_topology_assert();
  200 
  201         version = gctl_get_paraml(req, "version", sizeof(*version));
  202         if (version == NULL) {
  203                 gctl_error(req, "No '%s' argument.", "version");
  204                 return;
  205         }
  206         if (*version != G_RAID_VERSION) {
  207                 gctl_error(req, "Userland and kernel parts are out of sync.");
  208                 return;
  209         }
  210 
  211         if (strcmp(verb, "label") == 0)
  212                 g_raid_ctl_label(req, mp);
  213         else if (strcmp(verb, "stop") == 0)
  214                 g_raid_ctl_stop(req, mp);
  215         else
  216                 g_raid_ctl_other(req, mp);
  217 }

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FreeBSD/Linux Kernel Cross Reference sys/geom/raid/g_raid_ctl.c

FreeBSD/Linux Kernel Cross Reference
sys/geom/raid/g_raid_ctl.c