2002-03-11 21:42:35 +00:00
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/*-
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* Copyright (c) 2002 Poul-Henning Kamp
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Poul-Henning Kamp
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* and NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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2002-10-20 18:48:12 +00:00
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#include <sys/stdint.h>
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2002-03-11 21:42:35 +00:00
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/bio.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/errno.h>
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#include <sys/time.h>
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#include <sys/disk.h>
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#include <sys/fcntl.h>
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#include <geom/geom.h>
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2002-04-23 19:54:02 +00:00
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#include <geom/geom_int.h>
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2002-04-19 09:24:12 +00:00
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#include <machine/limits.h>
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2002-03-11 21:42:35 +00:00
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static d_open_t g_dev_open;
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static d_close_t g_dev_close;
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static d_strategy_t g_dev_strategy;
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static d_ioctl_t g_dev_ioctl;
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static struct cdevsw g_dev_cdevsw = {
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2003-03-03 12:15:54 +00:00
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.d_open = g_dev_open,
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.d_close = g_dev_close,
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.d_read = physread,
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.d_write = physwrite,
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.d_ioctl = g_dev_ioctl,
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.d_strategy = g_dev_strategy,
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.d_name = "g_dev",
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.d_maj = GEOM_MAJOR,
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.d_flags = D_DISK | D_TRACKCLOSE,
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2002-03-11 21:42:35 +00:00
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};
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static g_taste_t g_dev_taste;
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static g_orphan_t g_dev_orphan;
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2002-03-26 21:40:06 +00:00
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static struct g_class g_dev_class = {
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2002-05-21 19:50:04 +00:00
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"DEV",
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2002-03-11 21:42:35 +00:00
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g_dev_taste,
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NULL,
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2002-06-09 10:57:34 +00:00
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G_CLASS_INITIALIZER
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2002-03-11 21:42:35 +00:00
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};
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2002-10-25 18:42:42 +00:00
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int
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g_dev_print(void)
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{
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struct g_geom *gp;
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if (LIST_EMPTY(&g_dev_class.geom))
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return (0);
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printf("List of GEOM disk devices:\n ");
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LIST_FOREACH(gp, &g_dev_class.geom, geom)
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printf(" %s", gp->name);
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printf("\n");
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return (1);
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}
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2002-12-26 20:45:37 +00:00
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/*
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* XXX: This is disgusting and wrong in every way imaginable: The only reason
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* XXX: we have a clone function is because of the root-mount hack we currently
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* XXX: employ. An improvment would be to unregister this cloner once we know
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* XXX: we no longer need it. Ideally, root-fs would be mounted through DEVFS
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* XXX: eliminating the need for this hack.
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*/
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2002-03-11 21:42:35 +00:00
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static void
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2002-09-28 11:57:20 +00:00
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g_dev_clone(void *arg __unused, char *name, int namelen __unused, dev_t *dev)
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2002-03-11 21:42:35 +00:00
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{
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struct g_geom *gp;
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if (*dev != NODEV)
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return;
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2002-06-09 10:57:34 +00:00
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g_waitidle();
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2002-03-11 21:42:35 +00:00
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/* g_topology_lock(); */
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2002-03-26 21:40:06 +00:00
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LIST_FOREACH(gp, &g_dev_class.geom, geom) {
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2002-03-11 21:42:35 +00:00
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if (strcmp(gp->name, name))
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continue;
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*dev = gp->softc;
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g_trace(G_T_TOPOLOGY, "g_dev_clone(%s) = %p", name, *dev);
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return;
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}
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/* g_topology_unlock(); */
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return;
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}
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static void
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g_dev_register_cloner(void *foo __unused)
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{
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static int once;
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2002-05-20 10:03:15 +00:00
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/* XXX: why would this happen more than once ?? */
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2002-03-11 21:42:35 +00:00
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if (!once) {
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2002-05-20 10:03:15 +00:00
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EVENTHANDLER_REGISTER(dev_clone, g_dev_clone, 0, 1000);
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2002-03-11 21:42:35 +00:00
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once++;
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}
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}
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SYSINIT(geomdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE,g_dev_register_cloner,NULL);
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static struct g_geom *
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2002-03-26 22:07:38 +00:00
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g_dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused)
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2002-03-11 21:42:35 +00:00
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{
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struct g_geom *gp;
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struct g_consumer *cp;
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2003-02-08 12:30:12 +00:00
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static int unit = GEOM_MINOR_PROVIDERS;
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2002-05-20 10:03:15 +00:00
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int error;
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2002-03-11 21:42:35 +00:00
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dev_t dev;
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g_trace(G_T_TOPOLOGY, "dev_taste(%s,%s)", mp->name, pp->name);
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g_topology_assert();
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LIST_FOREACH(cp, &pp->consumers, consumers)
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2002-03-26 21:40:06 +00:00
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if (cp->geom->class == mp)
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2002-03-11 21:42:35 +00:00
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return (NULL);
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gp = g_new_geomf(mp, pp->name);
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2002-04-04 09:54:13 +00:00
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gp->orphan = g_dev_orphan;
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2002-03-11 21:42:35 +00:00
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cp = g_new_consumer(gp);
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2002-05-20 10:03:15 +00:00
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error = g_attach(cp, pp);
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KASSERT(error == 0,
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("g_dev_taste(%s) failed to g_attach, err=%d", pp->name, error));
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/*
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* XXX: I'm not 100% sure we can call make_dev(9) without Giant
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* yet. Once we can, we don't need to drop topology here either.
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*/
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2002-03-11 21:42:35 +00:00
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g_topology_unlock();
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mtx_lock(&Giant);
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2002-05-20 10:03:15 +00:00
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dev = make_dev(&g_dev_cdevsw, unit2minor(unit++),
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2002-10-01 19:33:09 +00:00
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UID_ROOT, GID_OPERATOR, 0640, gp->name);
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2003-02-11 12:49:58 +00:00
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if (pp->flags & G_PF_CANDELETE)
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dev->si_flags |= SI_CANDELETE;
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2002-05-20 10:03:15 +00:00
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mtx_unlock(&Giant);
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g_topology_lock();
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2003-02-11 21:24:25 +00:00
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dev->si_iosize_max = MAXPHYS;
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2003-02-11 14:57:34 +00:00
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dev->si_stripesize = pp->stripesize;
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dev->si_stripeoffset = pp->stripeoffset;
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2002-03-11 21:42:35 +00:00
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gp->softc = dev;
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dev->si_drv1 = gp;
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dev->si_drv2 = cp;
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return (gp);
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}
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static int
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g_dev_open(dev_t dev, int flags, int fmt, struct thread *td)
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{
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struct g_geom *gp;
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struct g_consumer *cp;
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int error, r, w, e;
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gp = dev->si_drv1;
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cp = dev->si_drv2;
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if (gp == NULL || cp == NULL)
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return(ENXIO);
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g_trace(G_T_ACCESS, "g_dev_open(%s, %d, %d, %p)",
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gp->name, flags, fmt, td);
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2002-03-17 07:42:54 +00:00
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DROP_GIANT();
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2002-03-11 21:42:35 +00:00
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g_topology_lock();
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r = flags & FREAD ? 1 : 0;
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w = flags & FWRITE ? 1 : 0;
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2002-09-06 07:57:29 +00:00
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#ifdef notyet
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2002-03-11 21:42:35 +00:00
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e = flags & O_EXCL ? 1 : 0;
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2002-09-06 07:57:29 +00:00
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#else
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e = 0;
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#endif
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2002-03-11 21:42:35 +00:00
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error = g_access_rel(cp, r, w, e);
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g_topology_unlock();
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2002-03-17 07:42:54 +00:00
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PICKUP_GIANT();
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2002-06-09 10:57:34 +00:00
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g_waitidle();
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2003-01-02 09:38:22 +00:00
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dev->si_bsize_phys = cp->provider->sectorsize;
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2002-03-11 21:42:35 +00:00
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return(error);
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}
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static int
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g_dev_close(dev_t dev, int flags, int fmt, struct thread *td)
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{
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struct g_geom *gp;
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struct g_consumer *cp;
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int error, r, w, e;
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gp = dev->si_drv1;
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cp = dev->si_drv2;
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if (gp == NULL || cp == NULL)
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return(ENXIO);
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g_trace(G_T_ACCESS, "g_dev_close(%s, %d, %d, %p)",
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gp->name, flags, fmt, td);
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2002-03-17 07:42:54 +00:00
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DROP_GIANT();
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2002-03-11 21:42:35 +00:00
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g_topology_lock();
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r = flags & FREAD ? -1 : 0;
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w = flags & FWRITE ? -1 : 0;
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2002-09-06 07:57:29 +00:00
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#ifdef notyet
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2002-03-11 21:42:35 +00:00
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e = flags & O_EXCL ? -1 : 0;
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2002-09-06 07:57:29 +00:00
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#else
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e = 0;
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#endif
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2002-03-11 21:42:35 +00:00
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error = g_access_rel(cp, r, w, e);
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g_topology_unlock();
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2002-03-17 07:42:54 +00:00
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PICKUP_GIANT();
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2002-06-09 10:57:34 +00:00
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g_waitidle();
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2002-03-11 21:42:35 +00:00
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return (error);
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}
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static int
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g_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
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{
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2002-04-23 19:54:02 +00:00
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struct g_geom *gp, *gp2;
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2002-03-11 21:42:35 +00:00
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struct g_consumer *cp;
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2002-04-23 19:54:02 +00:00
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struct g_provider *pp2;
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2002-04-19 09:24:12 +00:00
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struct g_kerneldump kd;
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2002-03-11 21:42:35 +00:00
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int i, error;
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2002-04-19 09:24:12 +00:00
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u_int u;
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2002-03-16 09:24:19 +00:00
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struct g_ioctl *gio;
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2002-03-11 21:42:35 +00:00
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gp = dev->si_drv1;
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cp = dev->si_drv2;
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2002-04-23 19:54:02 +00:00
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pp2 = cp->provider;
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gp2 = pp2->geom;
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2002-10-07 06:25:26 +00:00
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gio = NULL;
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2002-03-11 21:42:35 +00:00
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error = 0;
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2002-03-17 07:42:54 +00:00
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DROP_GIANT();
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2002-03-16 09:24:19 +00:00
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2003-01-14 21:31:00 +00:00
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gio = NULL;
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2002-03-19 13:54:15 +00:00
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i = IOCPARM_LEN(cmd);
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switch (cmd) {
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case DIOCGSECTORSIZE:
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2002-10-20 20:28:24 +00:00
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*(u_int *)data = cp->provider->sectorsize;
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if (*(u_int *)data == 0)
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2002-10-15 21:28:50 +00:00
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error = ENOENT;
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2002-03-19 13:54:15 +00:00
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break;
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case DIOCGMEDIASIZE:
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2002-10-20 20:28:24 +00:00
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*(off_t *)data = cp->provider->mediasize;
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if (*(off_t *)data == 0)
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2002-10-15 21:28:50 +00:00
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error = ENOENT;
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2002-03-19 13:54:15 +00:00
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break;
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case DIOCGFWSECTORS:
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2002-03-26 22:07:38 +00:00
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error = g_io_getattr("GEOM::fwsectors", cp, &i, data);
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2002-10-15 21:28:50 +00:00
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if (error == 0 && *(u_int *)data == 0)
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error = ENOENT;
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2002-03-19 13:54:15 +00:00
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break;
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case DIOCGFWHEADS:
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2002-03-26 22:07:38 +00:00
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error = g_io_getattr("GEOM::fwheads", cp, &i, data);
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2002-10-15 21:28:50 +00:00
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if (error == 0 && *(u_int *)data == 0)
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error = ENOENT;
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2002-03-19 13:54:15 +00:00
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break;
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2002-04-09 15:43:32 +00:00
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case DIOCGFRONTSTUFF:
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error = g_io_getattr("GEOM::frontstuff", cp, &i, data);
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break;
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2002-04-19 09:24:12 +00:00
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case DIOCSKERNELDUMP:
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u = *((u_int *)data);
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if (!u) {
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set_dumper(NULL);
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error = 0;
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break;
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}
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kd.offset = 0;
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kd.length = OFF_MAX;
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i = sizeof kd;
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error = g_io_getattr("GEOM::kerneldump", cp, &i, &kd);
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if (!error)
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dev->si_flags |= SI_DUMPDEV;
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break;
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2002-10-07 06:25:26 +00:00
|
|
|
|
2002-03-19 13:54:15 +00:00
|
|
|
default:
|
2003-02-19 05:47:46 +00:00
|
|
|
gio = g_malloc(sizeof *gio, M_WAITOK | M_ZERO);
|
2002-03-19 13:54:15 +00:00
|
|
|
gio->cmd = cmd;
|
|
|
|
gio->data = data;
|
|
|
|
gio->fflag = fflag;
|
|
|
|
gio->td = td;
|
|
|
|
i = sizeof *gio;
|
2003-01-13 11:34:35 +00:00
|
|
|
/*
|
|
|
|
* We always issue ioctls as getattr since the direction of data
|
|
|
|
* movement in ioctl is no indication of the ioctl being a "set"
|
|
|
|
* or "get" type ioctl or if such simplistic terms even apply
|
|
|
|
*/
|
|
|
|
error = g_io_getattr("GEOM::ioctl", cp, &i, gio);
|
2002-03-19 13:54:15 +00:00
|
|
|
break;
|
|
|
|
}
|
2002-03-16 09:24:19 +00:00
|
|
|
|
2002-03-17 07:42:54 +00:00
|
|
|
PICKUP_GIANT();
|
2002-10-07 06:25:26 +00:00
|
|
|
if (error == EDIRIOCTL) {
|
|
|
|
KASSERT(gio != NULL, ("NULL gio but EDIRIOCTL"));
|
|
|
|
KASSERT(gio->func != NULL, ("NULL function but EDIRIOCTL"));
|
|
|
|
error = (gio->func)(gio->dev, cmd, data, fflag, td);
|
|
|
|
}
|
2002-06-09 10:57:34 +00:00
|
|
|
g_waitidle();
|
2003-01-14 21:31:00 +00:00
|
|
|
if (gio != NULL && (error == EOPNOTSUPP || error == ENOIOCTL)) {
|
2002-10-02 07:48:39 +00:00
|
|
|
if (g_debugflags & G_T_TOPOLOGY) {
|
|
|
|
i = IOCGROUP(cmd);
|
|
|
|
printf("IOCTL(0x%lx) \"%s\"", cmd, gp->name);
|
|
|
|
if (i > ' ' && i <= '~')
|
|
|
|
printf(" '%c'", (int)IOCGROUP(cmd));
|
|
|
|
else
|
|
|
|
printf(" 0x%lx", IOCGROUP(cmd));
|
|
|
|
printf("/%ld ", cmd & 0xff);
|
|
|
|
if (cmd & IOC_IN)
|
|
|
|
printf("I");
|
|
|
|
if (cmd & IOC_OUT)
|
|
|
|
printf("O");
|
|
|
|
printf("(%ld) = ENOIOCTL\n", IOCPARM_LEN(cmd));
|
|
|
|
}
|
2002-03-11 21:42:35 +00:00
|
|
|
error = ENOTTY;
|
2002-03-16 09:24:19 +00:00
|
|
|
}
|
2003-01-14 21:31:00 +00:00
|
|
|
if (gio != NULL)
|
|
|
|
g_free(gio);
|
2002-03-11 21:42:35 +00:00
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
g_dev_done(struct bio *bp2)
|
|
|
|
{
|
|
|
|
struct bio *bp;
|
|
|
|
|
2003-02-07 21:09:51 +00:00
|
|
|
bp = bp2->bio_parent;
|
2002-03-11 21:42:35 +00:00
|
|
|
bp->bio_error = bp2->bio_error;
|
|
|
|
if (bp->bio_error != 0) {
|
|
|
|
g_trace(G_T_BIO, "g_dev_done(%p) had error %d",
|
|
|
|
bp2, bp->bio_error);
|
|
|
|
bp->bio_flags |= BIO_ERROR;
|
|
|
|
} else {
|
2002-10-20 18:48:12 +00:00
|
|
|
g_trace(G_T_BIO, "g_dev_done(%p/%p) resid %ld completed %jd",
|
|
|
|
bp2, bp, bp->bio_resid, (intmax_t)bp2->bio_completed);
|
2002-03-11 21:42:35 +00:00
|
|
|
}
|
|
|
|
bp->bio_resid = bp->bio_bcount - bp2->bio_completed;
|
|
|
|
g_destroy_bio(bp2);
|
|
|
|
mtx_lock(&Giant);
|
|
|
|
biodone(bp);
|
|
|
|
mtx_unlock(&Giant);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
g_dev_strategy(struct bio *bp)
|
|
|
|
{
|
|
|
|
struct g_geom *gp;
|
|
|
|
struct g_consumer *cp;
|
|
|
|
struct bio *bp2;
|
|
|
|
dev_t dev;
|
|
|
|
|
2002-11-01 15:56:26 +00:00
|
|
|
KASSERT(bp->bio_cmd == BIO_READ ||
|
|
|
|
bp->bio_cmd == BIO_WRITE ||
|
|
|
|
bp->bio_cmd == BIO_DELETE,
|
|
|
|
("Wrong bio_cmd bio=%p cmd=%d", bp, bp->bio_cmd));
|
2002-03-11 21:42:35 +00:00
|
|
|
dev = bp->bio_dev;
|
|
|
|
gp = dev->si_drv1;
|
|
|
|
cp = dev->si_drv2;
|
|
|
|
bp2 = g_clone_bio(bp);
|
2002-12-13 22:04:45 +00:00
|
|
|
KASSERT(bp2 != NULL, ("XXX: ENOMEM in a bad place"));
|
2002-03-11 21:42:35 +00:00
|
|
|
bp2->bio_offset = (off_t)bp->bio_blkno << DEV_BSHIFT;
|
2002-12-13 22:04:45 +00:00
|
|
|
KASSERT(bp2->bio_offset >= 0,
|
|
|
|
("Negative bio_offset (%jd) on bio %p",
|
|
|
|
(intmax_t)bp2->bio_offset, bp));
|
2002-03-11 21:42:35 +00:00
|
|
|
bp2->bio_length = (off_t)bp->bio_bcount;
|
|
|
|
bp2->bio_done = g_dev_done;
|
|
|
|
g_trace(G_T_BIO,
|
2002-10-20 18:48:12 +00:00
|
|
|
"g_dev_strategy(%p/%p) offset %jd length %jd data %p cmd %d",
|
|
|
|
bp, bp2, (intmax_t)bp->bio_offset, (intmax_t)bp2->bio_length,
|
|
|
|
bp2->bio_data, bp2->bio_cmd);
|
2002-03-11 21:42:35 +00:00
|
|
|
g_io_request(bp2, cp);
|
|
|
|
}
|
|
|
|
|
2002-05-20 10:03:15 +00:00
|
|
|
/*
|
|
|
|
* g_dev_orphan()
|
|
|
|
*
|
2003-03-09 09:28:45 +00:00
|
|
|
* Called from below when the provider orphaned us.
|
|
|
|
* - Clear any dump settings.
|
|
|
|
* - Destroy the dev_t to prevent any more request from coming in. The
|
|
|
|
* provider is already marked with an error, so anything which comes in
|
|
|
|
* in the interrim will be returned immediately.
|
|
|
|
* - Wait for any outstanding I/O to finish.
|
|
|
|
* - Set our access counts to zero, whatever they were.
|
|
|
|
* - Detach and self-destruct.
|
2002-05-20 10:03:15 +00:00
|
|
|
*/
|
2002-03-11 21:42:35 +00:00
|
|
|
|
|
|
|
static void
|
2002-03-26 22:07:38 +00:00
|
|
|
g_dev_orphan(struct g_consumer *cp)
|
2002-03-11 21:42:35 +00:00
|
|
|
{
|
|
|
|
struct g_geom *gp;
|
|
|
|
dev_t dev;
|
|
|
|
|
|
|
|
g_topology_assert();
|
2003-03-09 09:28:45 +00:00
|
|
|
gp = cp->geom;
|
2002-03-11 21:42:35 +00:00
|
|
|
dev = gp->softc;
|
2003-03-09 09:28:45 +00:00
|
|
|
g_trace(G_T_TOPOLOGY, "g_dev_orphan(%p(%s))", cp, gp->name);
|
|
|
|
|
|
|
|
/* Reset any dump-area set on this device */
|
2002-04-19 09:24:12 +00:00
|
|
|
if (dev->si_flags & SI_DUMPDEV)
|
|
|
|
set_dumper(NULL);
|
2003-03-09 09:28:45 +00:00
|
|
|
|
|
|
|
/* Destroy the dev_t so we get no more requests */
|
2002-03-11 21:42:35 +00:00
|
|
|
destroy_dev(dev);
|
2003-03-09 09:28:45 +00:00
|
|
|
|
|
|
|
/* Wait for the cows to come home */
|
|
|
|
while (cp->nstart != cp->nend)
|
|
|
|
msleep(&dev, NULL, PRIBIO, "gdevorphan", 1);
|
|
|
|
|
2002-03-11 21:42:35 +00:00
|
|
|
if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
|
|
|
|
g_access_rel(cp, -cp->acr, -cp->acw, -cp->ace);
|
2003-03-09 09:28:45 +00:00
|
|
|
|
2002-06-09 10:57:34 +00:00
|
|
|
g_detach(cp);
|
2002-03-11 21:42:35 +00:00
|
|
|
g_destroy_consumer(cp);
|
|
|
|
g_destroy_geom(gp);
|
|
|
|
}
|
|
|
|
|
2002-05-20 10:03:15 +00:00
|
|
|
DECLARE_GEOM_CLASS(g_dev_class, g_dev);
|