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769afdc71e
MFC after: 3 days
1529 lines
36 KiB
C
1529 lines
36 KiB
C
/*-
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ddb.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/devicestat.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/bio.h>
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#include <sys/sysctl.h>
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#include <sys/proc.h>
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#include <sys/kthread.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/sbuf.h>
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#include <geom/geom.h>
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#include <geom/geom_int.h>
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#include <machine/stdarg.h>
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#ifdef DDB
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#include <ddb/ddb.h>
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#endif
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#ifdef KDB
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#include <sys/kdb.h>
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#endif
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struct class_list_head g_classes = LIST_HEAD_INITIALIZER(g_classes);
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static struct g_tailq_head geoms = TAILQ_HEAD_INITIALIZER(geoms);
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char *g_wait_event, *g_wait_up, *g_wait_down, *g_wait_sim;
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struct g_hh00 {
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struct g_class *mp;
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struct g_provider *pp;
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off_t size;
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int error;
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int post;
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};
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/*
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* This event offers a new class a chance to taste all preexisting providers.
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*/
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static void
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g_load_class(void *arg, int flag)
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{
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struct g_hh00 *hh;
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struct g_class *mp2, *mp;
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struct g_geom *gp;
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struct g_provider *pp;
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g_topology_assert();
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if (flag == EV_CANCEL) /* XXX: can't happen ? */
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return;
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if (g_shutdown)
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return;
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hh = arg;
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mp = hh->mp;
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hh->error = 0;
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if (hh->post) {
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g_free(hh);
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hh = NULL;
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}
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g_trace(G_T_TOPOLOGY, "g_load_class(%s)", mp->name);
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KASSERT(mp->name != NULL && *mp->name != '\0',
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("GEOM class has no name"));
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LIST_FOREACH(mp2, &g_classes, class) {
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if (mp2 == mp) {
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printf("The GEOM class %s is already loaded.\n",
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mp2->name);
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if (hh != NULL)
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hh->error = EEXIST;
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return;
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} else if (strcmp(mp2->name, mp->name) == 0) {
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printf("A GEOM class %s is already loaded.\n",
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mp2->name);
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if (hh != NULL)
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hh->error = EEXIST;
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return;
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}
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}
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LIST_INIT(&mp->geom);
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LIST_INSERT_HEAD(&g_classes, mp, class);
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if (mp->init != NULL)
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mp->init(mp);
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if (mp->taste == NULL)
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return;
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LIST_FOREACH(mp2, &g_classes, class) {
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if (mp == mp2)
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continue;
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LIST_FOREACH(gp, &mp2->geom, geom) {
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LIST_FOREACH(pp, &gp->provider, provider) {
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mp->taste(mp, pp, 0);
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g_topology_assert();
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}
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}
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}
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}
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static int
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g_unload_class(struct g_class *mp)
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{
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struct g_geom *gp;
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struct g_provider *pp;
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struct g_consumer *cp;
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int error;
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g_topology_lock();
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g_trace(G_T_TOPOLOGY, "g_unload_class(%s)", mp->name);
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retry:
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G_VALID_CLASS(mp);
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LIST_FOREACH(gp, &mp->geom, geom) {
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/* We refuse to unload if anything is open */
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LIST_FOREACH(pp, &gp->provider, provider)
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if (pp->acr || pp->acw || pp->ace) {
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g_topology_unlock();
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return (EBUSY);
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}
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LIST_FOREACH(cp, &gp->consumer, consumer)
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if (cp->acr || cp->acw || cp->ace) {
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g_topology_unlock();
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return (EBUSY);
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}
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/* If the geom is withering, wait for it to finish. */
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if (gp->flags & G_GEOM_WITHER) {
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g_topology_sleep(mp, 1);
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goto retry;
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}
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}
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/*
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* We allow unloading if we have no geoms, or a class
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* method we can use to get rid of them.
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*/
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if (!LIST_EMPTY(&mp->geom) && mp->destroy_geom == NULL) {
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g_topology_unlock();
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return (EOPNOTSUPP);
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}
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/* Bar new entries */
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mp->taste = NULL;
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mp->config = NULL;
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LIST_FOREACH(gp, &mp->geom, geom) {
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error = mp->destroy_geom(NULL, mp, gp);
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if (error != 0) {
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g_topology_unlock();
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return (error);
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}
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}
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/* Wait for withering to finish. */
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for (;;) {
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gp = LIST_FIRST(&mp->geom);
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if (gp == NULL)
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break;
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KASSERT(gp->flags & G_GEOM_WITHER,
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("Non-withering geom in class %s", mp->name));
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g_topology_sleep(mp, 1);
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}
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G_VALID_CLASS(mp);
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if (mp->fini != NULL)
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mp->fini(mp);
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LIST_REMOVE(mp, class);
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g_topology_unlock();
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return (0);
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}
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int
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g_modevent(module_t mod, int type, void *data)
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{
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struct g_hh00 *hh;
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int error;
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static int g_ignition;
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struct g_class *mp;
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mp = data;
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if (mp->version != G_VERSION) {
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printf("GEOM class %s has Wrong version %x\n",
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mp->name, mp->version);
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return (EINVAL);
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}
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if (!g_ignition) {
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g_ignition++;
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g_init();
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}
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error = EOPNOTSUPP;
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switch (type) {
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case MOD_LOAD:
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g_trace(G_T_TOPOLOGY, "g_modevent(%s, LOAD)", mp->name);
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hh = g_malloc(sizeof *hh, M_WAITOK | M_ZERO);
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hh->mp = mp;
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/*
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* Once the system is not cold, MOD_LOAD calls will be
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* from the userland and the g_event thread will be able
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* to acknowledge their completion.
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*/
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if (cold) {
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hh->post = 1;
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error = g_post_event(g_load_class, hh, M_WAITOK, NULL);
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} else {
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error = g_waitfor_event(g_load_class, hh, M_WAITOK,
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NULL);
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if (error == 0)
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error = hh->error;
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g_free(hh);
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}
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break;
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case MOD_UNLOAD:
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g_trace(G_T_TOPOLOGY, "g_modevent(%s, UNLOAD)", mp->name);
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DROP_GIANT();
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error = g_unload_class(mp);
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PICKUP_GIANT();
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if (error == 0) {
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KASSERT(LIST_EMPTY(&mp->geom),
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("Unloaded class (%s) still has geom", mp->name));
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}
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break;
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}
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return (error);
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}
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static void
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g_retaste_event(void *arg, int flag)
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{
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struct g_class *mp, *mp2;
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struct g_geom *gp;
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struct g_hh00 *hh;
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struct g_provider *pp;
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struct g_consumer *cp;
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g_topology_assert();
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if (flag == EV_CANCEL) /* XXX: can't happen ? */
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return;
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if (g_shutdown)
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return;
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hh = arg;
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mp = hh->mp;
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hh->error = 0;
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if (hh->post) {
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g_free(hh);
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hh = NULL;
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}
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g_trace(G_T_TOPOLOGY, "g_retaste(%s)", mp->name);
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LIST_FOREACH(mp2, &g_classes, class) {
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LIST_FOREACH(gp, &mp2->geom, geom) {
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LIST_FOREACH(pp, &gp->provider, provider) {
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if (pp->acr || pp->acw || pp->ace)
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continue;
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LIST_FOREACH(cp, &pp->consumers, consumers) {
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if (cp->geom->class == mp &&
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(cp->flags & G_CF_ORPHAN) == 0)
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break;
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}
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if (cp != NULL) {
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cp->flags |= G_CF_ORPHAN;
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g_wither_geom(cp->geom, ENXIO);
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}
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mp->taste(mp, pp, 0);
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g_topology_assert();
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}
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}
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}
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}
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int
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g_retaste(struct g_class *mp)
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{
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struct g_hh00 *hh;
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int error;
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if (mp->taste == NULL)
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return (EINVAL);
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hh = g_malloc(sizeof *hh, M_WAITOK | M_ZERO);
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hh->mp = mp;
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if (cold) {
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hh->post = 1;
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error = g_post_event(g_retaste_event, hh, M_WAITOK, NULL);
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} else {
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error = g_waitfor_event(g_retaste_event, hh, M_WAITOK, NULL);
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if (error == 0)
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error = hh->error;
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g_free(hh);
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}
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return (error);
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}
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struct g_geom *
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g_new_geomf(struct g_class *mp, const char *fmt, ...)
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{
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struct g_geom *gp;
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va_list ap;
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struct sbuf *sb;
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g_topology_assert();
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G_VALID_CLASS(mp);
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sb = sbuf_new_auto();
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va_start(ap, fmt);
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sbuf_vprintf(sb, fmt, ap);
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va_end(ap);
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sbuf_finish(sb);
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gp = g_malloc(sizeof *gp, M_WAITOK | M_ZERO);
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gp->name = g_malloc(sbuf_len(sb) + 1, M_WAITOK | M_ZERO);
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gp->class = mp;
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gp->rank = 1;
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LIST_INIT(&gp->consumer);
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LIST_INIT(&gp->provider);
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LIST_INSERT_HEAD(&mp->geom, gp, geom);
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TAILQ_INSERT_HEAD(&geoms, gp, geoms);
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strcpy(gp->name, sbuf_data(sb));
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sbuf_delete(sb);
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/* Fill in defaults from class */
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gp->start = mp->start;
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gp->spoiled = mp->spoiled;
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gp->attrchanged = mp->attrchanged;
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gp->providergone = mp->providergone;
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gp->dumpconf = mp->dumpconf;
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gp->access = mp->access;
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gp->orphan = mp->orphan;
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gp->ioctl = mp->ioctl;
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gp->resize = mp->resize;
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return (gp);
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}
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void
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g_destroy_geom(struct g_geom *gp)
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{
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g_topology_assert();
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G_VALID_GEOM(gp);
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g_trace(G_T_TOPOLOGY, "g_destroy_geom(%p(%s))", gp, gp->name);
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KASSERT(LIST_EMPTY(&gp->consumer),
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("g_destroy_geom(%s) with consumer(s) [%p]",
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gp->name, LIST_FIRST(&gp->consumer)));
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KASSERT(LIST_EMPTY(&gp->provider),
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("g_destroy_geom(%s) with provider(s) [%p]",
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gp->name, LIST_FIRST(&gp->provider)));
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g_cancel_event(gp);
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LIST_REMOVE(gp, geom);
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TAILQ_REMOVE(&geoms, gp, geoms);
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g_free(gp->name);
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g_free(gp);
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}
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/*
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* This function is called (repeatedly) until the geom has withered away.
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*/
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void
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g_wither_geom(struct g_geom *gp, int error)
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{
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struct g_provider *pp;
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g_topology_assert();
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G_VALID_GEOM(gp);
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g_trace(G_T_TOPOLOGY, "g_wither_geom(%p(%s))", gp, gp->name);
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if (!(gp->flags & G_GEOM_WITHER)) {
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gp->flags |= G_GEOM_WITHER;
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LIST_FOREACH(pp, &gp->provider, provider)
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if (!(pp->flags & G_PF_ORPHAN))
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g_orphan_provider(pp, error);
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}
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g_do_wither();
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}
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/*
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* Convenience function to destroy a particular provider.
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*/
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void
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g_wither_provider(struct g_provider *pp, int error)
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{
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pp->flags |= G_PF_WITHER;
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if (!(pp->flags & G_PF_ORPHAN))
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g_orphan_provider(pp, error);
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}
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/*
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* This function is called (repeatedly) until the has withered away.
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*/
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void
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g_wither_geom_close(struct g_geom *gp, int error)
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{
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struct g_consumer *cp;
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g_topology_assert();
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G_VALID_GEOM(gp);
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g_trace(G_T_TOPOLOGY, "g_wither_geom_close(%p(%s))", gp, gp->name);
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LIST_FOREACH(cp, &gp->consumer, consumer)
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if (cp->acr || cp->acw || cp->ace)
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g_access(cp, -cp->acr, -cp->acw, -cp->ace);
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g_wither_geom(gp, error);
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}
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/*
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* This function is called (repeatedly) until we cant wash away more
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* withered bits at present. Return value contains two bits. Bit 0
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* set means "withering stuff we can't wash now", bit 1 means "call
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* me again, there may be stuff I didn't get the first time around.
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*/
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int
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g_wither_washer()
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{
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struct g_class *mp;
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struct g_geom *gp, *gp2;
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struct g_provider *pp, *pp2;
|
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struct g_consumer *cp, *cp2;
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int result;
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result = 0;
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g_topology_assert();
|
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LIST_FOREACH(mp, &g_classes, class) {
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LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
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LIST_FOREACH_SAFE(pp, &gp->provider, provider, pp2) {
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if (!(pp->flags & G_PF_WITHER))
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continue;
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if (LIST_EMPTY(&pp->consumers))
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g_destroy_provider(pp);
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else
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result |= 1;
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}
|
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if (!(gp->flags & G_GEOM_WITHER))
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continue;
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LIST_FOREACH_SAFE(pp, &gp->provider, provider, pp2) {
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if (LIST_EMPTY(&pp->consumers))
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g_destroy_provider(pp);
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|
else
|
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result |= 1;
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}
|
|
LIST_FOREACH_SAFE(cp, &gp->consumer, consumer, cp2) {
|
|
if (cp->acr || cp->acw || cp->ace) {
|
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result |= 1;
|
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continue;
|
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}
|
|
if (cp->provider != NULL)
|
|
g_detach(cp);
|
|
g_destroy_consumer(cp);
|
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result |= 2;
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|
}
|
|
if (LIST_EMPTY(&gp->provider) &&
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LIST_EMPTY(&gp->consumer))
|
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g_destroy_geom(gp);
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|
else
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result |= 1;
|
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}
|
|
}
|
|
return (result);
|
|
}
|
|
|
|
struct g_consumer *
|
|
g_new_consumer(struct g_geom *gp)
|
|
{
|
|
struct g_consumer *cp;
|
|
|
|
g_topology_assert();
|
|
G_VALID_GEOM(gp);
|
|
KASSERT(!(gp->flags & G_GEOM_WITHER),
|
|
("g_new_consumer on WITHERing geom(%s) (class %s)",
|
|
gp->name, gp->class->name));
|
|
KASSERT(gp->orphan != NULL,
|
|
("g_new_consumer on geom(%s) (class %s) without orphan",
|
|
gp->name, gp->class->name));
|
|
|
|
cp = g_malloc(sizeof *cp, M_WAITOK | M_ZERO);
|
|
cp->geom = gp;
|
|
cp->stat = devstat_new_entry(cp, -1, 0, DEVSTAT_ALL_SUPPORTED,
|
|
DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
|
|
LIST_INSERT_HEAD(&gp->consumer, cp, consumer);
|
|
return(cp);
|
|
}
|
|
|
|
void
|
|
g_destroy_consumer(struct g_consumer *cp)
|
|
{
|
|
struct g_geom *gp;
|
|
|
|
g_topology_assert();
|
|
G_VALID_CONSUMER(cp);
|
|
g_trace(G_T_TOPOLOGY, "g_destroy_consumer(%p)", cp);
|
|
KASSERT (cp->provider == NULL, ("g_destroy_consumer but attached"));
|
|
KASSERT (cp->acr == 0, ("g_destroy_consumer with acr"));
|
|
KASSERT (cp->acw == 0, ("g_destroy_consumer with acw"));
|
|
KASSERT (cp->ace == 0, ("g_destroy_consumer with ace"));
|
|
g_cancel_event(cp);
|
|
gp = cp->geom;
|
|
LIST_REMOVE(cp, consumer);
|
|
devstat_remove_entry(cp->stat);
|
|
g_free(cp);
|
|
if (gp->flags & G_GEOM_WITHER)
|
|
g_do_wither();
|
|
}
|
|
|
|
static void
|
|
g_new_provider_event(void *arg, int flag)
|
|
{
|
|
struct g_class *mp;
|
|
struct g_provider *pp;
|
|
struct g_consumer *cp, *next_cp;
|
|
|
|
g_topology_assert();
|
|
if (flag == EV_CANCEL)
|
|
return;
|
|
if (g_shutdown)
|
|
return;
|
|
pp = arg;
|
|
G_VALID_PROVIDER(pp);
|
|
KASSERT(!(pp->flags & G_PF_WITHER),
|
|
("g_new_provider_event but withered"));
|
|
LIST_FOREACH_SAFE(cp, &pp->consumers, consumers, next_cp) {
|
|
if ((cp->flags & G_CF_ORPHAN) == 0 &&
|
|
cp->geom->attrchanged != NULL)
|
|
cp->geom->attrchanged(cp, "GEOM::media");
|
|
}
|
|
LIST_FOREACH(mp, &g_classes, class) {
|
|
if (mp->taste == NULL)
|
|
continue;
|
|
LIST_FOREACH(cp, &pp->consumers, consumers)
|
|
if (cp->geom->class == mp &&
|
|
(cp->flags & G_CF_ORPHAN) == 0)
|
|
break;
|
|
if (cp != NULL)
|
|
continue;
|
|
mp->taste(mp, pp, 0);
|
|
g_topology_assert();
|
|
}
|
|
}
|
|
|
|
|
|
struct g_provider *
|
|
g_new_providerf(struct g_geom *gp, const char *fmt, ...)
|
|
{
|
|
struct g_provider *pp;
|
|
struct sbuf *sb;
|
|
va_list ap;
|
|
|
|
g_topology_assert();
|
|
G_VALID_GEOM(gp);
|
|
KASSERT(gp->access != NULL,
|
|
("new provider on geom(%s) without ->access (class %s)",
|
|
gp->name, gp->class->name));
|
|
KASSERT(gp->start != NULL,
|
|
("new provider on geom(%s) without ->start (class %s)",
|
|
gp->name, gp->class->name));
|
|
KASSERT(!(gp->flags & G_GEOM_WITHER),
|
|
("new provider on WITHERing geom(%s) (class %s)",
|
|
gp->name, gp->class->name));
|
|
sb = sbuf_new_auto();
|
|
va_start(ap, fmt);
|
|
sbuf_vprintf(sb, fmt, ap);
|
|
va_end(ap);
|
|
sbuf_finish(sb);
|
|
pp = g_malloc(sizeof *pp + sbuf_len(sb) + 1, M_WAITOK | M_ZERO);
|
|
pp->name = (char *)(pp + 1);
|
|
strcpy(pp->name, sbuf_data(sb));
|
|
sbuf_delete(sb);
|
|
LIST_INIT(&pp->consumers);
|
|
pp->error = ENXIO;
|
|
pp->geom = gp;
|
|
pp->stat = devstat_new_entry(pp, -1, 0, DEVSTAT_ALL_SUPPORTED,
|
|
DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
|
|
LIST_INSERT_HEAD(&gp->provider, pp, provider);
|
|
g_post_event(g_new_provider_event, pp, M_WAITOK, pp, gp, NULL);
|
|
return (pp);
|
|
}
|
|
|
|
void
|
|
g_error_provider(struct g_provider *pp, int error)
|
|
{
|
|
|
|
/* G_VALID_PROVIDER(pp); We may not have g_topology */
|
|
pp->error = error;
|
|
}
|
|
|
|
static void
|
|
g_resize_provider_event(void *arg, int flag)
|
|
{
|
|
struct g_hh00 *hh;
|
|
struct g_class *mp;
|
|
struct g_geom *gp;
|
|
struct g_provider *pp;
|
|
struct g_consumer *cp, *cp2;
|
|
off_t size;
|
|
|
|
g_topology_assert();
|
|
if (g_shutdown)
|
|
return;
|
|
|
|
hh = arg;
|
|
pp = hh->pp;
|
|
size = hh->size;
|
|
g_free(hh);
|
|
|
|
G_VALID_PROVIDER(pp);
|
|
g_trace(G_T_TOPOLOGY, "g_resize_provider_event(%p)", pp);
|
|
|
|
LIST_FOREACH_SAFE(cp, &pp->consumers, consumers, cp2) {
|
|
gp = cp->geom;
|
|
if (gp->resize == NULL && size < pp->mediasize) {
|
|
cp->flags |= G_CF_ORPHAN;
|
|
cp->geom->orphan(cp);
|
|
}
|
|
}
|
|
|
|
pp->mediasize = size;
|
|
|
|
LIST_FOREACH_SAFE(cp, &pp->consumers, consumers, cp2) {
|
|
gp = cp->geom;
|
|
if (gp->resize != NULL)
|
|
gp->resize(cp);
|
|
}
|
|
|
|
/*
|
|
* After resizing, the previously invalid GEOM class metadata
|
|
* might become valid. This means we should retaste.
|
|
*/
|
|
LIST_FOREACH(mp, &g_classes, class) {
|
|
if (mp->taste == NULL)
|
|
continue;
|
|
LIST_FOREACH(cp, &pp->consumers, consumers)
|
|
if (cp->geom->class == mp &&
|
|
(cp->flags & G_CF_ORPHAN) == 0)
|
|
break;
|
|
if (cp != NULL)
|
|
continue;
|
|
mp->taste(mp, pp, 0);
|
|
g_topology_assert();
|
|
}
|
|
}
|
|
|
|
void
|
|
g_resize_provider(struct g_provider *pp, off_t size)
|
|
{
|
|
struct g_hh00 *hh;
|
|
|
|
G_VALID_PROVIDER(pp);
|
|
|
|
if (size == pp->mediasize)
|
|
return;
|
|
|
|
hh = g_malloc(sizeof *hh, M_WAITOK | M_ZERO);
|
|
hh->pp = pp;
|
|
hh->size = size;
|
|
g_post_event(g_resize_provider_event, hh, M_WAITOK, NULL);
|
|
}
|
|
|
|
#ifndef _PATH_DEV
|
|
#define _PATH_DEV "/dev/"
|
|
#endif
|
|
|
|
struct g_provider *
|
|
g_provider_by_name(char const *arg)
|
|
{
|
|
struct g_class *cp;
|
|
struct g_geom *gp;
|
|
struct g_provider *pp;
|
|
|
|
if (strncmp(arg, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
|
|
arg += sizeof(_PATH_DEV) - 1;
|
|
|
|
LIST_FOREACH(cp, &g_classes, class) {
|
|
LIST_FOREACH(gp, &cp->geom, geom) {
|
|
LIST_FOREACH(pp, &gp->provider, provider) {
|
|
if (!strcmp(arg, pp->name))
|
|
return (pp);
|
|
}
|
|
}
|
|
}
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
void
|
|
g_destroy_provider(struct g_provider *pp)
|
|
{
|
|
struct g_geom *gp;
|
|
|
|
g_topology_assert();
|
|
G_VALID_PROVIDER(pp);
|
|
KASSERT(LIST_EMPTY(&pp->consumers),
|
|
("g_destroy_provider but attached"));
|
|
KASSERT (pp->acr == 0, ("g_destroy_provider with acr"));
|
|
KASSERT (pp->acw == 0, ("g_destroy_provider with acw"));
|
|
KASSERT (pp->ace == 0, ("g_destroy_provider with ace"));
|
|
g_cancel_event(pp);
|
|
LIST_REMOVE(pp, provider);
|
|
gp = pp->geom;
|
|
devstat_remove_entry(pp->stat);
|
|
/*
|
|
* If a callback was provided, send notification that the provider
|
|
* is now gone.
|
|
*/
|
|
if (gp->providergone != NULL)
|
|
gp->providergone(pp);
|
|
|
|
g_free(pp);
|
|
if ((gp->flags & G_GEOM_WITHER))
|
|
g_do_wither();
|
|
}
|
|
|
|
/*
|
|
* We keep the "geoms" list sorted by topological order (== increasing
|
|
* numerical rank) at all times.
|
|
* When an attach is done, the attaching geoms rank is invalidated
|
|
* and it is moved to the tail of the list.
|
|
* All geoms later in the sequence has their ranks reevaluated in
|
|
* sequence. If we cannot assign rank to a geom because it's
|
|
* prerequisites do not have rank, we move that element to the tail
|
|
* of the sequence with invalid rank as well.
|
|
* At some point we encounter our original geom and if we stil fail
|
|
* to assign it a rank, there must be a loop and we fail back to
|
|
* g_attach() which detach again and calls redo_rank again
|
|
* to fix up the damage.
|
|
* It would be much simpler code wise to do it recursively, but we
|
|
* can't risk that on the kernel stack.
|
|
*/
|
|
|
|
static int
|
|
redo_rank(struct g_geom *gp)
|
|
{
|
|
struct g_consumer *cp;
|
|
struct g_geom *gp1, *gp2;
|
|
int n, m;
|
|
|
|
g_topology_assert();
|
|
G_VALID_GEOM(gp);
|
|
|
|
/* Invalidate this geoms rank and move it to the tail */
|
|
gp1 = TAILQ_NEXT(gp, geoms);
|
|
if (gp1 != NULL) {
|
|
gp->rank = 0;
|
|
TAILQ_REMOVE(&geoms, gp, geoms);
|
|
TAILQ_INSERT_TAIL(&geoms, gp, geoms);
|
|
} else {
|
|
gp1 = gp;
|
|
}
|
|
|
|
/* re-rank the rest of the sequence */
|
|
for (; gp1 != NULL; gp1 = gp2) {
|
|
gp1->rank = 0;
|
|
m = 1;
|
|
LIST_FOREACH(cp, &gp1->consumer, consumer) {
|
|
if (cp->provider == NULL)
|
|
continue;
|
|
n = cp->provider->geom->rank;
|
|
if (n == 0) {
|
|
m = 0;
|
|
break;
|
|
} else if (n >= m)
|
|
m = n + 1;
|
|
}
|
|
gp1->rank = m;
|
|
gp2 = TAILQ_NEXT(gp1, geoms);
|
|
|
|
/* got a rank, moving on */
|
|
if (m != 0)
|
|
continue;
|
|
|
|
/* no rank to original geom means loop */
|
|
if (gp == gp1)
|
|
return (ELOOP);
|
|
|
|
/* no rank, put it at the end move on */
|
|
TAILQ_REMOVE(&geoms, gp1, geoms);
|
|
TAILQ_INSERT_TAIL(&geoms, gp1, geoms);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
g_attach(struct g_consumer *cp, struct g_provider *pp)
|
|
{
|
|
int error;
|
|
|
|
g_topology_assert();
|
|
G_VALID_CONSUMER(cp);
|
|
G_VALID_PROVIDER(pp);
|
|
g_trace(G_T_TOPOLOGY, "g_attach(%p, %p)", cp, pp);
|
|
KASSERT(cp->provider == NULL, ("attach but attached"));
|
|
cp->provider = pp;
|
|
LIST_INSERT_HEAD(&pp->consumers, cp, consumers);
|
|
error = redo_rank(cp->geom);
|
|
if (error) {
|
|
LIST_REMOVE(cp, consumers);
|
|
cp->provider = NULL;
|
|
redo_rank(cp->geom);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
g_detach(struct g_consumer *cp)
|
|
{
|
|
struct g_provider *pp;
|
|
|
|
g_topology_assert();
|
|
G_VALID_CONSUMER(cp);
|
|
g_trace(G_T_TOPOLOGY, "g_detach(%p)", cp);
|
|
KASSERT(cp->provider != NULL, ("detach but not attached"));
|
|
KASSERT(cp->acr == 0, ("detach but nonzero acr"));
|
|
KASSERT(cp->acw == 0, ("detach but nonzero acw"));
|
|
KASSERT(cp->ace == 0, ("detach but nonzero ace"));
|
|
KASSERT(cp->nstart == cp->nend,
|
|
("detach with active requests"));
|
|
pp = cp->provider;
|
|
LIST_REMOVE(cp, consumers);
|
|
cp->provider = NULL;
|
|
if (pp->geom->flags & G_GEOM_WITHER)
|
|
g_do_wither();
|
|
else if (pp->flags & G_PF_WITHER)
|
|
g_do_wither();
|
|
redo_rank(cp->geom);
|
|
}
|
|
|
|
/*
|
|
* g_access()
|
|
*
|
|
* Access-check with delta values. The question asked is "can provider
|
|
* "cp" change the access counters by the relative amounts dc[rwe] ?"
|
|
*/
|
|
|
|
int
|
|
g_access(struct g_consumer *cp, int dcr, int dcw, int dce)
|
|
{
|
|
struct g_provider *pp;
|
|
int pr,pw,pe;
|
|
int error;
|
|
|
|
g_topology_assert();
|
|
G_VALID_CONSUMER(cp);
|
|
pp = cp->provider;
|
|
KASSERT(pp != NULL, ("access but not attached"));
|
|
G_VALID_PROVIDER(pp);
|
|
|
|
g_trace(G_T_ACCESS, "g_access(%p(%s), %d, %d, %d)",
|
|
cp, pp->name, dcr, dcw, dce);
|
|
|
|
KASSERT(cp->acr + dcr >= 0, ("access resulting in negative acr"));
|
|
KASSERT(cp->acw + dcw >= 0, ("access resulting in negative acw"));
|
|
KASSERT(cp->ace + dce >= 0, ("access resulting in negative ace"));
|
|
KASSERT(dcr != 0 || dcw != 0 || dce != 0, ("NOP access request"));
|
|
KASSERT(pp->geom->access != NULL, ("NULL geom->access"));
|
|
|
|
/*
|
|
* If our class cares about being spoiled, and we have been, we
|
|
* are probably just ahead of the event telling us that. Fail
|
|
* now rather than having to unravel this later.
|
|
*/
|
|
if (cp->geom->spoiled != NULL && (cp->flags & G_CF_SPOILED) &&
|
|
(dcr > 0 || dcw > 0 || dce > 0))
|
|
return (ENXIO);
|
|
|
|
/*
|
|
* Figure out what counts the provider would have had, if this
|
|
* consumer had (r0w0e0) at this time.
|
|
*/
|
|
pr = pp->acr - cp->acr;
|
|
pw = pp->acw - cp->acw;
|
|
pe = pp->ace - cp->ace;
|
|
|
|
g_trace(G_T_ACCESS,
|
|
"open delta:[r%dw%de%d] old:[r%dw%de%d] provider:[r%dw%de%d] %p(%s)",
|
|
dcr, dcw, dce,
|
|
cp->acr, cp->acw, cp->ace,
|
|
pp->acr, pp->acw, pp->ace,
|
|
pp, pp->name);
|
|
|
|
/* If foot-shooting is enabled, any open on rank#1 is OK */
|
|
if ((g_debugflags & 16) && pp->geom->rank == 1)
|
|
;
|
|
/* If we try exclusive but already write: fail */
|
|
else if (dce > 0 && pw > 0)
|
|
return (EPERM);
|
|
/* If we try write but already exclusive: fail */
|
|
else if (dcw > 0 && pe > 0)
|
|
return (EPERM);
|
|
/* If we try to open more but provider is error'ed: fail */
|
|
else if ((dcr > 0 || dcw > 0 || dce > 0) && pp->error != 0)
|
|
return (pp->error);
|
|
|
|
/* Ok then... */
|
|
|
|
error = pp->geom->access(pp, dcr, dcw, dce);
|
|
KASSERT(dcr > 0 || dcw > 0 || dce > 0 || error == 0,
|
|
("Geom provider %s::%s failed closing ->access()",
|
|
pp->geom->class->name, pp->name));
|
|
if (!error) {
|
|
/*
|
|
* If we open first write, spoil any partner consumers.
|
|
* If we close last write and provider is not errored,
|
|
* trigger re-taste.
|
|
*/
|
|
if (pp->acw == 0 && dcw != 0)
|
|
g_spoil(pp, cp);
|
|
else if (pp->acw != 0 && pp->acw == -dcw && pp->error == 0 &&
|
|
!(pp->geom->flags & G_GEOM_WITHER))
|
|
g_post_event(g_new_provider_event, pp, M_WAITOK,
|
|
pp, NULL);
|
|
|
|
pp->acr += dcr;
|
|
pp->acw += dcw;
|
|
pp->ace += dce;
|
|
cp->acr += dcr;
|
|
cp->acw += dcw;
|
|
cp->ace += dce;
|
|
if (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)
|
|
KASSERT(pp->sectorsize > 0,
|
|
("Provider %s lacks sectorsize", pp->name));
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
g_handleattr_int(struct bio *bp, const char *attribute, int val)
|
|
{
|
|
|
|
return (g_handleattr(bp, attribute, &val, sizeof val));
|
|
}
|
|
|
|
int
|
|
g_handleattr_off_t(struct bio *bp, const char *attribute, off_t val)
|
|
{
|
|
|
|
return (g_handleattr(bp, attribute, &val, sizeof val));
|
|
}
|
|
|
|
int
|
|
g_handleattr_str(struct bio *bp, const char *attribute, const char *str)
|
|
{
|
|
|
|
return (g_handleattr(bp, attribute, str, 0));
|
|
}
|
|
|
|
int
|
|
g_handleattr(struct bio *bp, const char *attribute, const void *val, int len)
|
|
{
|
|
int error = 0;
|
|
|
|
if (strcmp(bp->bio_attribute, attribute))
|
|
return (0);
|
|
if (len == 0) {
|
|
bzero(bp->bio_data, bp->bio_length);
|
|
if (strlcpy(bp->bio_data, val, bp->bio_length) >=
|
|
bp->bio_length) {
|
|
printf("%s: %s bio_length %jd len %zu -> EFAULT\n",
|
|
__func__, bp->bio_to->name,
|
|
(intmax_t)bp->bio_length, strlen(val));
|
|
error = EFAULT;
|
|
}
|
|
} else if (bp->bio_length == len) {
|
|
bcopy(val, bp->bio_data, len);
|
|
} else {
|
|
printf("%s: %s bio_length %jd len %d -> EFAULT\n", __func__,
|
|
bp->bio_to->name, (intmax_t)bp->bio_length, len);
|
|
error = EFAULT;
|
|
}
|
|
if (error == 0)
|
|
bp->bio_completed = bp->bio_length;
|
|
g_io_deliver(bp, error);
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
g_std_access(struct g_provider *pp,
|
|
int dr __unused, int dw __unused, int de __unused)
|
|
{
|
|
|
|
g_topology_assert();
|
|
G_VALID_PROVIDER(pp);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
g_std_done(struct bio *bp)
|
|
{
|
|
struct bio *bp2;
|
|
|
|
bp2 = bp->bio_parent;
|
|
if (bp2->bio_error == 0)
|
|
bp2->bio_error = bp->bio_error;
|
|
bp2->bio_completed += bp->bio_completed;
|
|
g_destroy_bio(bp);
|
|
bp2->bio_inbed++;
|
|
if (bp2->bio_children == bp2->bio_inbed)
|
|
g_io_deliver(bp2, bp2->bio_error);
|
|
}
|
|
|
|
/* XXX: maybe this is only g_slice_spoiled */
|
|
|
|
void
|
|
g_std_spoiled(struct g_consumer *cp)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_provider *pp;
|
|
|
|
g_topology_assert();
|
|
G_VALID_CONSUMER(cp);
|
|
g_trace(G_T_TOPOLOGY, "g_std_spoiled(%p)", cp);
|
|
cp->flags |= G_CF_ORPHAN;
|
|
g_detach(cp);
|
|
gp = cp->geom;
|
|
LIST_FOREACH(pp, &gp->provider, provider)
|
|
g_orphan_provider(pp, ENXIO);
|
|
g_destroy_consumer(cp);
|
|
if (LIST_EMPTY(&gp->provider) && LIST_EMPTY(&gp->consumer))
|
|
g_destroy_geom(gp);
|
|
else
|
|
gp->flags |= G_GEOM_WITHER;
|
|
}
|
|
|
|
/*
|
|
* Spoiling happens when a provider is opened for writing, but consumers
|
|
* which are configured by in-band data are attached (slicers for instance).
|
|
* Since the write might potentially change the in-band data, such consumers
|
|
* need to re-evaluate their existence after the writing session closes.
|
|
* We do this by (offering to) tear them down when the open for write happens
|
|
* in return for a re-taste when it closes again.
|
|
* Together with the fact that such consumers grab an 'e' bit whenever they
|
|
* are open, regardless of mode, this ends up DTRT.
|
|
*/
|
|
|
|
static void
|
|
g_spoil_event(void *arg, int flag)
|
|
{
|
|
struct g_provider *pp;
|
|
struct g_consumer *cp, *cp2;
|
|
|
|
g_topology_assert();
|
|
if (flag == EV_CANCEL)
|
|
return;
|
|
pp = arg;
|
|
G_VALID_PROVIDER(pp);
|
|
for (cp = LIST_FIRST(&pp->consumers); cp != NULL; cp = cp2) {
|
|
cp2 = LIST_NEXT(cp, consumers);
|
|
if ((cp->flags & G_CF_SPOILED) == 0)
|
|
continue;
|
|
cp->flags &= ~G_CF_SPOILED;
|
|
if (cp->geom->spoiled == NULL)
|
|
continue;
|
|
cp->geom->spoiled(cp);
|
|
g_topology_assert();
|
|
}
|
|
}
|
|
|
|
void
|
|
g_spoil(struct g_provider *pp, struct g_consumer *cp)
|
|
{
|
|
struct g_consumer *cp2;
|
|
|
|
g_topology_assert();
|
|
G_VALID_PROVIDER(pp);
|
|
G_VALID_CONSUMER(cp);
|
|
|
|
LIST_FOREACH(cp2, &pp->consumers, consumers) {
|
|
if (cp2 == cp)
|
|
continue;
|
|
/*
|
|
KASSERT(cp2->acr == 0, ("spoiling cp->acr = %d", cp2->acr));
|
|
KASSERT(cp2->acw == 0, ("spoiling cp->acw = %d", cp2->acw));
|
|
*/
|
|
KASSERT(cp2->ace == 0, ("spoiling cp->ace = %d", cp2->ace));
|
|
cp2->flags |= G_CF_SPOILED;
|
|
}
|
|
g_post_event(g_spoil_event, pp, M_WAITOK, pp, NULL);
|
|
}
|
|
|
|
static void
|
|
g_media_changed_event(void *arg, int flag)
|
|
{
|
|
struct g_provider *pp;
|
|
int retaste;
|
|
|
|
g_topology_assert();
|
|
if (flag == EV_CANCEL)
|
|
return;
|
|
pp = arg;
|
|
G_VALID_PROVIDER(pp);
|
|
|
|
/*
|
|
* If provider was not open for writing, queue retaste after spoiling.
|
|
* If it was, retaste will happen automatically on close.
|
|
*/
|
|
retaste = (pp->acw == 0 && pp->error == 0 &&
|
|
!(pp->geom->flags & G_GEOM_WITHER));
|
|
g_spoil_event(arg, flag);
|
|
if (retaste)
|
|
g_post_event(g_new_provider_event, pp, M_WAITOK, pp, NULL);
|
|
}
|
|
|
|
int
|
|
g_media_changed(struct g_provider *pp, int flag)
|
|
{
|
|
struct g_consumer *cp;
|
|
|
|
LIST_FOREACH(cp, &pp->consumers, consumers)
|
|
cp->flags |= G_CF_SPOILED;
|
|
return (g_post_event(g_media_changed_event, pp, flag, pp, NULL));
|
|
}
|
|
|
|
int
|
|
g_media_gone(struct g_provider *pp, int flag)
|
|
{
|
|
struct g_consumer *cp;
|
|
|
|
LIST_FOREACH(cp, &pp->consumers, consumers)
|
|
cp->flags |= G_CF_SPOILED;
|
|
return (g_post_event(g_spoil_event, pp, flag, pp, NULL));
|
|
}
|
|
|
|
int
|
|
g_getattr__(const char *attr, struct g_consumer *cp, void *var, int len)
|
|
{
|
|
int error, i;
|
|
|
|
i = len;
|
|
error = g_io_getattr(attr, cp, &i, var);
|
|
if (error)
|
|
return (error);
|
|
if (i != len)
|
|
return (EINVAL);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_get_device_prefix_len(const char *name)
|
|
{
|
|
int len;
|
|
|
|
if (strncmp(name, "ada", 3) == 0)
|
|
len = 3;
|
|
else if (strncmp(name, "ad", 2) == 0)
|
|
len = 2;
|
|
else
|
|
return (0);
|
|
if (name[len] < '0' || name[len] > '9')
|
|
return (0);
|
|
do {
|
|
len++;
|
|
} while (name[len] >= '0' && name[len] <= '9');
|
|
return (len);
|
|
}
|
|
|
|
int
|
|
g_compare_names(const char *namea, const char *nameb)
|
|
{
|
|
int deva, devb;
|
|
|
|
if (strcmp(namea, nameb) == 0)
|
|
return (1);
|
|
deva = g_get_device_prefix_len(namea);
|
|
if (deva == 0)
|
|
return (0);
|
|
devb = g_get_device_prefix_len(nameb);
|
|
if (devb == 0)
|
|
return (0);
|
|
if (strcmp(namea + deva, nameb + devb) == 0)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
#if defined(DIAGNOSTIC) || defined(DDB)
|
|
/*
|
|
* This function walks the mesh and returns a non-zero integer if it
|
|
* finds the argument pointer is an object. The return value indicates
|
|
* which type of object it is believed to be. If topology is not locked,
|
|
* this function is potentially dangerous, but we don't assert that the
|
|
* topology lock is held when called from debugger.
|
|
*/
|
|
int
|
|
g_valid_obj(void const *ptr)
|
|
{
|
|
struct g_class *mp;
|
|
struct g_geom *gp;
|
|
struct g_consumer *cp;
|
|
struct g_provider *pp;
|
|
|
|
#ifdef KDB
|
|
if (kdb_active == 0)
|
|
#endif
|
|
g_topology_assert();
|
|
|
|
LIST_FOREACH(mp, &g_classes, class) {
|
|
if (ptr == mp)
|
|
return (1);
|
|
LIST_FOREACH(gp, &mp->geom, geom) {
|
|
if (ptr == gp)
|
|
return (2);
|
|
LIST_FOREACH(cp, &gp->consumer, consumer)
|
|
if (ptr == cp)
|
|
return (3);
|
|
LIST_FOREACH(pp, &gp->provider, provider)
|
|
if (ptr == pp)
|
|
return (4);
|
|
}
|
|
}
|
|
return(0);
|
|
}
|
|
#endif
|
|
|
|
#ifdef DDB
|
|
|
|
#define gprintf(...) do { \
|
|
db_printf("%*s", indent, ""); \
|
|
db_printf(__VA_ARGS__); \
|
|
} while (0)
|
|
#define gprintln(...) do { \
|
|
gprintf(__VA_ARGS__); \
|
|
db_printf("\n"); \
|
|
} while (0)
|
|
|
|
#define ADDFLAG(obj, flag, sflag) do { \
|
|
if ((obj)->flags & (flag)) { \
|
|
if (comma) \
|
|
strlcat(str, ",", size); \
|
|
strlcat(str, (sflag), size); \
|
|
comma = 1; \
|
|
} \
|
|
} while (0)
|
|
|
|
static char *
|
|
provider_flags_to_string(struct g_provider *pp, char *str, size_t size)
|
|
{
|
|
int comma = 0;
|
|
|
|
bzero(str, size);
|
|
if (pp->flags == 0) {
|
|
strlcpy(str, "NONE", size);
|
|
return (str);
|
|
}
|
|
ADDFLAG(pp, G_PF_WITHER, "G_PF_WITHER");
|
|
ADDFLAG(pp, G_PF_ORPHAN, "G_PF_ORPHAN");
|
|
return (str);
|
|
}
|
|
|
|
static char *
|
|
geom_flags_to_string(struct g_geom *gp, char *str, size_t size)
|
|
{
|
|
int comma = 0;
|
|
|
|
bzero(str, size);
|
|
if (gp->flags == 0) {
|
|
strlcpy(str, "NONE", size);
|
|
return (str);
|
|
}
|
|
ADDFLAG(gp, G_GEOM_WITHER, "G_GEOM_WITHER");
|
|
return (str);
|
|
}
|
|
static void
|
|
db_show_geom_consumer(int indent, struct g_consumer *cp)
|
|
{
|
|
|
|
if (indent == 0) {
|
|
gprintln("consumer: %p", cp);
|
|
gprintln(" class: %s (%p)", cp->geom->class->name,
|
|
cp->geom->class);
|
|
gprintln(" geom: %s (%p)", cp->geom->name, cp->geom);
|
|
if (cp->provider == NULL)
|
|
gprintln(" provider: none");
|
|
else {
|
|
gprintln(" provider: %s (%p)", cp->provider->name,
|
|
cp->provider);
|
|
}
|
|
gprintln(" access: r%dw%de%d", cp->acr, cp->acw, cp->ace);
|
|
gprintln(" flags: 0x%04x", cp->flags);
|
|
gprintln(" nstart: %u", cp->nstart);
|
|
gprintln(" nend: %u", cp->nend);
|
|
} else {
|
|
gprintf("consumer: %p (%s), access=r%dw%de%d", cp,
|
|
cp->provider != NULL ? cp->provider->name : "none",
|
|
cp->acr, cp->acw, cp->ace);
|
|
if (cp->flags)
|
|
db_printf(", flags=0x%04x", cp->flags);
|
|
db_printf("\n");
|
|
}
|
|
}
|
|
|
|
static void
|
|
db_show_geom_provider(int indent, struct g_provider *pp)
|
|
{
|
|
struct g_consumer *cp;
|
|
char flags[64];
|
|
|
|
if (indent == 0) {
|
|
gprintln("provider: %s (%p)", pp->name, pp);
|
|
gprintln(" class: %s (%p)", pp->geom->class->name,
|
|
pp->geom->class);
|
|
gprintln(" geom: %s (%p)", pp->geom->name, pp->geom);
|
|
gprintln(" mediasize: %jd", (intmax_t)pp->mediasize);
|
|
gprintln(" sectorsize: %u", pp->sectorsize);
|
|
gprintln(" stripesize: %u", pp->stripesize);
|
|
gprintln(" stripeoffset: %u", pp->stripeoffset);
|
|
gprintln(" access: r%dw%de%d", pp->acr, pp->acw,
|
|
pp->ace);
|
|
gprintln(" flags: %s (0x%04x)",
|
|
provider_flags_to_string(pp, flags, sizeof(flags)),
|
|
pp->flags);
|
|
gprintln(" error: %d", pp->error);
|
|
gprintln(" nstart: %u", pp->nstart);
|
|
gprintln(" nend: %u", pp->nend);
|
|
if (LIST_EMPTY(&pp->consumers))
|
|
gprintln(" consumers: none");
|
|
} else {
|
|
gprintf("provider: %s (%p), access=r%dw%de%d",
|
|
pp->name, pp, pp->acr, pp->acw, pp->ace);
|
|
if (pp->flags != 0) {
|
|
db_printf(", flags=%s (0x%04x)",
|
|
provider_flags_to_string(pp, flags, sizeof(flags)),
|
|
pp->flags);
|
|
}
|
|
db_printf("\n");
|
|
}
|
|
if (!LIST_EMPTY(&pp->consumers)) {
|
|
LIST_FOREACH(cp, &pp->consumers, consumers) {
|
|
db_show_geom_consumer(indent + 2, cp);
|
|
if (db_pager_quit)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
db_show_geom_geom(int indent, struct g_geom *gp)
|
|
{
|
|
struct g_provider *pp;
|
|
struct g_consumer *cp;
|
|
char flags[64];
|
|
|
|
if (indent == 0) {
|
|
gprintln("geom: %s (%p)", gp->name, gp);
|
|
gprintln(" class: %s (%p)", gp->class->name, gp->class);
|
|
gprintln(" flags: %s (0x%04x)",
|
|
geom_flags_to_string(gp, flags, sizeof(flags)), gp->flags);
|
|
gprintln(" rank: %d", gp->rank);
|
|
if (LIST_EMPTY(&gp->provider))
|
|
gprintln(" providers: none");
|
|
if (LIST_EMPTY(&gp->consumer))
|
|
gprintln(" consumers: none");
|
|
} else {
|
|
gprintf("geom: %s (%p), rank=%d", gp->name, gp, gp->rank);
|
|
if (gp->flags != 0) {
|
|
db_printf(", flags=%s (0x%04x)",
|
|
geom_flags_to_string(gp, flags, sizeof(flags)),
|
|
gp->flags);
|
|
}
|
|
db_printf("\n");
|
|
}
|
|
if (!LIST_EMPTY(&gp->provider)) {
|
|
LIST_FOREACH(pp, &gp->provider, provider) {
|
|
db_show_geom_provider(indent + 2, pp);
|
|
if (db_pager_quit)
|
|
break;
|
|
}
|
|
}
|
|
if (!LIST_EMPTY(&gp->consumer)) {
|
|
LIST_FOREACH(cp, &gp->consumer, consumer) {
|
|
db_show_geom_consumer(indent + 2, cp);
|
|
if (db_pager_quit)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
db_show_geom_class(struct g_class *mp)
|
|
{
|
|
struct g_geom *gp;
|
|
|
|
db_printf("class: %s (%p)\n", mp->name, mp);
|
|
LIST_FOREACH(gp, &mp->geom, geom) {
|
|
db_show_geom_geom(2, gp);
|
|
if (db_pager_quit)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Print the GEOM topology or the given object.
|
|
*/
|
|
DB_SHOW_COMMAND(geom, db_show_geom)
|
|
{
|
|
struct g_class *mp;
|
|
|
|
if (!have_addr) {
|
|
/* No address given, print the entire topology. */
|
|
LIST_FOREACH(mp, &g_classes, class) {
|
|
db_show_geom_class(mp);
|
|
db_printf("\n");
|
|
if (db_pager_quit)
|
|
break;
|
|
}
|
|
} else {
|
|
switch (g_valid_obj((void *)addr)) {
|
|
case 1:
|
|
db_show_geom_class((struct g_class *)addr);
|
|
break;
|
|
case 2:
|
|
db_show_geom_geom(0, (struct g_geom *)addr);
|
|
break;
|
|
case 3:
|
|
db_show_geom_consumer(0, (struct g_consumer *)addr);
|
|
break;
|
|
case 4:
|
|
db_show_geom_provider(0, (struct g_provider *)addr);
|
|
break;
|
|
default:
|
|
db_printf("Not a GEOM object.\n");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
db_print_bio_cmd(struct bio *bp)
|
|
{
|
|
db_printf(" cmd: ");
|
|
switch (bp->bio_cmd) {
|
|
case BIO_READ: db_printf("BIO_READ"); break;
|
|
case BIO_WRITE: db_printf("BIO_WRITE"); break;
|
|
case BIO_DELETE: db_printf("BIO_DELETE"); break;
|
|
case BIO_GETATTR: db_printf("BIO_GETATTR"); break;
|
|
case BIO_FLUSH: db_printf("BIO_FLUSH"); break;
|
|
case BIO_CMD0: db_printf("BIO_CMD0"); break;
|
|
case BIO_CMD1: db_printf("BIO_CMD1"); break;
|
|
case BIO_CMD2: db_printf("BIO_CMD2"); break;
|
|
default: db_printf("UNKNOWN"); break;
|
|
}
|
|
db_printf("\n");
|
|
}
|
|
|
|
static void
|
|
db_print_bio_flags(struct bio *bp)
|
|
{
|
|
int comma;
|
|
|
|
comma = 0;
|
|
db_printf(" flags: ");
|
|
if (bp->bio_flags & BIO_ERROR) {
|
|
db_printf("BIO_ERROR");
|
|
comma = 1;
|
|
}
|
|
if (bp->bio_flags & BIO_DONE) {
|
|
db_printf("%sBIO_DONE", (comma ? ", " : ""));
|
|
comma = 1;
|
|
}
|
|
if (bp->bio_flags & BIO_ONQUEUE)
|
|
db_printf("%sBIO_ONQUEUE", (comma ? ", " : ""));
|
|
db_printf("\n");
|
|
}
|
|
|
|
/*
|
|
* Print useful information in a BIO
|
|
*/
|
|
DB_SHOW_COMMAND(bio, db_show_bio)
|
|
{
|
|
struct bio *bp;
|
|
|
|
if (have_addr) {
|
|
bp = (struct bio *)addr;
|
|
db_printf("BIO %p\n", bp);
|
|
db_print_bio_cmd(bp);
|
|
db_print_bio_flags(bp);
|
|
db_printf(" cflags: 0x%hhx\n", bp->bio_cflags);
|
|
db_printf(" pflags: 0x%hhx\n", bp->bio_pflags);
|
|
db_printf(" offset: %jd\n", (intmax_t)bp->bio_offset);
|
|
db_printf(" length: %jd\n", (intmax_t)bp->bio_length);
|
|
db_printf(" bcount: %ld\n", bp->bio_bcount);
|
|
db_printf(" resid: %ld\n", bp->bio_resid);
|
|
db_printf(" completed: %jd\n", (intmax_t)bp->bio_completed);
|
|
db_printf(" children: %u\n", bp->bio_children);
|
|
db_printf(" inbed: %u\n", bp->bio_inbed);
|
|
db_printf(" error: %d\n", bp->bio_error);
|
|
db_printf(" parent: %p\n", bp->bio_parent);
|
|
db_printf(" driver1: %p\n", bp->bio_driver1);
|
|
db_printf(" driver2: %p\n", bp->bio_driver2);
|
|
db_printf(" caller1: %p\n", bp->bio_caller1);
|
|
db_printf(" caller2: %p\n", bp->bio_caller2);
|
|
db_printf(" bio_from: %p\n", bp->bio_from);
|
|
db_printf(" bio_to: %p\n", bp->bio_to);
|
|
}
|
|
}
|
|
|
|
#undef gprintf
|
|
#undef gprintln
|
|
#undef ADDFLAG
|
|
|
|
#endif /* DDB */
|