xref: /freebsd/sys/geom/geom_subr.c (revision 769afdc71ea6b0c09dae883ce49d913cbc8cff5b)
1dd84a43cSPoul-Henning Kamp /*-
2dd84a43cSPoul-Henning Kamp  * Copyright (c) 2002 Poul-Henning Kamp
3dd84a43cSPoul-Henning Kamp  * Copyright (c) 2002 Networks Associates Technology, Inc.
4dd84a43cSPoul-Henning Kamp  * All rights reserved.
5dd84a43cSPoul-Henning Kamp  *
6dd84a43cSPoul-Henning Kamp  * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7dd84a43cSPoul-Henning Kamp  * and NAI Labs, the Security Research Division of Network Associates, Inc.
8dd84a43cSPoul-Henning Kamp  * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9dd84a43cSPoul-Henning Kamp  * DARPA CHATS research program.
10dd84a43cSPoul-Henning Kamp  *
11dd84a43cSPoul-Henning Kamp  * Redistribution and use in source and binary forms, with or without
12dd84a43cSPoul-Henning Kamp  * modification, are permitted provided that the following conditions
13dd84a43cSPoul-Henning Kamp  * are met:
14dd84a43cSPoul-Henning Kamp  * 1. Redistributions of source code must retain the above copyright
15dd84a43cSPoul-Henning Kamp  *    notice, this list of conditions and the following disclaimer.
16dd84a43cSPoul-Henning Kamp  * 2. Redistributions in binary form must reproduce the above copyright
17dd84a43cSPoul-Henning Kamp  *    notice, this list of conditions and the following disclaimer in the
18dd84a43cSPoul-Henning Kamp  *    documentation and/or other materials provided with the distribution.
19dd84a43cSPoul-Henning Kamp  * 3. The names of the authors may not be used to endorse or promote
20dd84a43cSPoul-Henning Kamp  *    products derived from this software without specific prior written
21dd84a43cSPoul-Henning Kamp  *    permission.
22dd84a43cSPoul-Henning Kamp  *
23dd84a43cSPoul-Henning Kamp  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24dd84a43cSPoul-Henning Kamp  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25dd84a43cSPoul-Henning Kamp  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26dd84a43cSPoul-Henning Kamp  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27dd84a43cSPoul-Henning Kamp  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28dd84a43cSPoul-Henning Kamp  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29dd84a43cSPoul-Henning Kamp  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30dd84a43cSPoul-Henning Kamp  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31dd84a43cSPoul-Henning Kamp  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32dd84a43cSPoul-Henning Kamp  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33dd84a43cSPoul-Henning Kamp  * SUCH DAMAGE.
34dd84a43cSPoul-Henning Kamp  */
35dd84a43cSPoul-Henning Kamp 
3650b1faefSDavid E. O'Brien #include <sys/cdefs.h>
3750b1faefSDavid E. O'Brien __FBSDID("$FreeBSD$");
38dd84a43cSPoul-Henning Kamp 
39679f8b7eSPawel Jakub Dawidek #include "opt_ddb.h"
40679f8b7eSPawel Jakub Dawidek 
41dd84a43cSPoul-Henning Kamp #include <sys/param.h>
42dd84a43cSPoul-Henning Kamp #include <sys/systm.h>
43e24cbd90SPoul-Henning Kamp #include <sys/devicestat.h>
44dd84a43cSPoul-Henning Kamp #include <sys/kernel.h>
45dd84a43cSPoul-Henning Kamp #include <sys/malloc.h>
46dd84a43cSPoul-Henning Kamp #include <sys/bio.h>
47dd84a43cSPoul-Henning Kamp #include <sys/sysctl.h>
48dd84a43cSPoul-Henning Kamp #include <sys/proc.h>
49dd84a43cSPoul-Henning Kamp #include <sys/kthread.h>
50dd84a43cSPoul-Henning Kamp #include <sys/lock.h>
51dd84a43cSPoul-Henning Kamp #include <sys/mutex.h>
52dd84a43cSPoul-Henning Kamp #include <sys/errno.h>
53dd84a43cSPoul-Henning Kamp #include <sys/sbuf.h>
54dd84a43cSPoul-Henning Kamp #include <geom/geom.h>
55b1876192SPoul-Henning Kamp #include <geom/geom_int.h>
56dd84a43cSPoul-Henning Kamp #include <machine/stdarg.h>
57dd84a43cSPoul-Henning Kamp 
58679f8b7eSPawel Jakub Dawidek #ifdef DDB
59679f8b7eSPawel Jakub Dawidek #include <ddb/ddb.h>
60679f8b7eSPawel Jakub Dawidek #endif
61679f8b7eSPawel Jakub Dawidek 
62002d1d1cSJaakko Heinonen #ifdef KDB
63002d1d1cSJaakko Heinonen #include <sys/kdb.h>
64002d1d1cSJaakko Heinonen #endif
65002d1d1cSJaakko Heinonen 
662654e1fcSPoul-Henning Kamp struct class_list_head g_classes = LIST_HEAD_INITIALIZER(g_classes);
67dd84a43cSPoul-Henning Kamp static struct g_tailq_head geoms = TAILQ_HEAD_INITIALIZER(geoms);
68dd84a43cSPoul-Henning Kamp char *g_wait_event, *g_wait_up, *g_wait_down, *g_wait_sim;
69dd84a43cSPoul-Henning Kamp 
706c87f8d5SPoul-Henning Kamp struct g_hh00 {
716c87f8d5SPoul-Henning Kamp 	struct g_class		*mp;
72245899ccSEdward Tomasz Napierala 	struct g_provider	*pp;
73245899ccSEdward Tomasz Napierala 	off_t			size;
746c87f8d5SPoul-Henning Kamp 	int			error;
75f96c8ef1SAndrew R. Reiter 	int			post;
766c87f8d5SPoul-Henning Kamp };
779972896cSPoul-Henning Kamp 
789972896cSPoul-Henning Kamp /*
799972896cSPoul-Henning Kamp  * This event offers a new class a chance to taste all preexisting providers.
809972896cSPoul-Henning Kamp  */
819972896cSPoul-Henning Kamp static void
826c87f8d5SPoul-Henning Kamp g_load_class(void *arg, int flag)
839972896cSPoul-Henning Kamp {
846c87f8d5SPoul-Henning Kamp 	struct g_hh00 *hh;
859972896cSPoul-Henning Kamp 	struct g_class *mp2, *mp;
869972896cSPoul-Henning Kamp 	struct g_geom *gp;
879972896cSPoul-Henning Kamp 	struct g_provider *pp;
889972896cSPoul-Henning Kamp 
899972896cSPoul-Henning Kamp 	g_topology_assert();
906c87f8d5SPoul-Henning Kamp 	if (flag == EV_CANCEL)	/* XXX: can't happen ? */
919972896cSPoul-Henning Kamp 		return;
929972896cSPoul-Henning Kamp 	if (g_shutdown)
939972896cSPoul-Henning Kamp 		return;
946c87f8d5SPoul-Henning Kamp 
956c87f8d5SPoul-Henning Kamp 	hh = arg;
966c87f8d5SPoul-Henning Kamp 	mp = hh->mp;
97f96c8ef1SAndrew R. Reiter 	hh->error = 0;
989bb329f4SPoul-Henning Kamp 	if (hh->post) {
999bb329f4SPoul-Henning Kamp 		g_free(hh);
1009bb329f4SPoul-Henning Kamp 		hh = NULL;
1019bb329f4SPoul-Henning Kamp 	}
1026c87f8d5SPoul-Henning Kamp 	g_trace(G_T_TOPOLOGY, "g_load_class(%s)", mp->name);
103799426f8SPoul-Henning Kamp 	KASSERT(mp->name != NULL && *mp->name != '\0',
104799426f8SPoul-Henning Kamp 	    ("GEOM class has no name"));
105ce64e0f2SPoul-Henning Kamp 	LIST_FOREACH(mp2, &g_classes, class) {
106f96c8ef1SAndrew R. Reiter 		if (mp2 == mp) {
107f96c8ef1SAndrew R. Reiter 			printf("The GEOM class %s is already loaded.\n",
108f96c8ef1SAndrew R. Reiter 			    mp2->name);
1099bb329f4SPoul-Henning Kamp 			if (hh != NULL)
110f96c8ef1SAndrew R. Reiter 				hh->error = EEXIST;
111f96c8ef1SAndrew R. Reiter 			return;
112f96c8ef1SAndrew R. Reiter 		} else if (strcmp(mp2->name, mp->name) == 0) {
113f96c8ef1SAndrew R. Reiter 			printf("A GEOM class %s is already loaded.\n",
114f96c8ef1SAndrew R. Reiter 			    mp2->name);
1159bb329f4SPoul-Henning Kamp 			if (hh != NULL)
116f96c8ef1SAndrew R. Reiter 				hh->error = EEXIST;
117f96c8ef1SAndrew R. Reiter 			return;
118f96c8ef1SAndrew R. Reiter 		}
119ce64e0f2SPoul-Henning Kamp 	}
1206c87f8d5SPoul-Henning Kamp 
1216c87f8d5SPoul-Henning Kamp 	LIST_INIT(&mp->geom);
1226c87f8d5SPoul-Henning Kamp 	LIST_INSERT_HEAD(&g_classes, mp, class);
1230ecc7670SPoul-Henning Kamp 	if (mp->init != NULL)
1240ecc7670SPoul-Henning Kamp 		mp->init(mp);
1256c87f8d5SPoul-Henning Kamp 	if (mp->taste == NULL)
1269972896cSPoul-Henning Kamp 		return;
1276c87f8d5SPoul-Henning Kamp 	LIST_FOREACH(mp2, &g_classes, class) {
1286c87f8d5SPoul-Henning Kamp 		if (mp == mp2)
1299972896cSPoul-Henning Kamp 			continue;
1306c87f8d5SPoul-Henning Kamp 		LIST_FOREACH(gp, &mp2->geom, geom) {
1319972896cSPoul-Henning Kamp 			LIST_FOREACH(pp, &gp->provider, provider) {
1326c87f8d5SPoul-Henning Kamp 				mp->taste(mp, pp, 0);
1339972896cSPoul-Henning Kamp 				g_topology_assert();
1349972896cSPoul-Henning Kamp 			}
1359972896cSPoul-Henning Kamp 		}
1369972896cSPoul-Henning Kamp 	}
1379972896cSPoul-Henning Kamp }
1389972896cSPoul-Henning Kamp 
1399061251fSJaakko Heinonen static int
1409061251fSJaakko Heinonen g_unload_class(struct g_class *mp)
141dd84a43cSPoul-Henning Kamp {
1426c87f8d5SPoul-Henning Kamp 	struct g_geom *gp;
1436c87f8d5SPoul-Henning Kamp 	struct g_provider *pp;
1446c87f8d5SPoul-Henning Kamp 	struct g_consumer *cp;
1456c87f8d5SPoul-Henning Kamp 	int error;
1466c87f8d5SPoul-Henning Kamp 
1479061251fSJaakko Heinonen 	g_topology_lock();
1486c87f8d5SPoul-Henning Kamp 	g_trace(G_T_TOPOLOGY, "g_unload_class(%s)", mp->name);
1499061251fSJaakko Heinonen retry:
1509061251fSJaakko Heinonen 	G_VALID_CLASS(mp);
1519061251fSJaakko Heinonen 	LIST_FOREACH(gp, &mp->geom, geom) {
1529061251fSJaakko Heinonen 		/* We refuse to unload if anything is open */
1539061251fSJaakko Heinonen 		LIST_FOREACH(pp, &gp->provider, provider)
1549061251fSJaakko Heinonen 			if (pp->acr || pp->acw || pp->ace) {
1559061251fSJaakko Heinonen 				g_topology_unlock();
1569061251fSJaakko Heinonen 				return (EBUSY);
1579061251fSJaakko Heinonen 			}
1589061251fSJaakko Heinonen 		LIST_FOREACH(cp, &gp->consumer, consumer)
1599061251fSJaakko Heinonen 			if (cp->acr || cp->acw || cp->ace) {
1609061251fSJaakko Heinonen 				g_topology_unlock();
1619061251fSJaakko Heinonen 				return (EBUSY);
1629061251fSJaakko Heinonen 			}
1639061251fSJaakko Heinonen 		/* If the geom is withering, wait for it to finish. */
1649061251fSJaakko Heinonen 		if (gp->flags & G_GEOM_WITHER) {
1659061251fSJaakko Heinonen 			g_topology_sleep(mp, 1);
1669061251fSJaakko Heinonen 			goto retry;
1679061251fSJaakko Heinonen 		}
1689061251fSJaakko Heinonen 	}
1690ed4f6a1SPoul-Henning Kamp 
1700ed4f6a1SPoul-Henning Kamp 	/*
1710ed4f6a1SPoul-Henning Kamp 	 * We allow unloading if we have no geoms, or a class
1720ed4f6a1SPoul-Henning Kamp 	 * method we can use to get rid of them.
1730ed4f6a1SPoul-Henning Kamp 	 */
1740ed4f6a1SPoul-Henning Kamp 	if (!LIST_EMPTY(&mp->geom) && mp->destroy_geom == NULL) {
1759061251fSJaakko Heinonen 		g_topology_unlock();
1769061251fSJaakko Heinonen 		return (EOPNOTSUPP);
1776c87f8d5SPoul-Henning Kamp 	}
1786c87f8d5SPoul-Henning Kamp 
1796c87f8d5SPoul-Henning Kamp 	/* Bar new entries */
1806c87f8d5SPoul-Henning Kamp 	mp->taste = NULL;
1816c87f8d5SPoul-Henning Kamp 	mp->config = NULL;
1826c87f8d5SPoul-Henning Kamp 
1839061251fSJaakko Heinonen 	LIST_FOREACH(gp, &mp->geom, geom) {
1849061251fSJaakko Heinonen 		error = mp->destroy_geom(NULL, mp, gp);
1859061251fSJaakko Heinonen 		if (error != 0) {
1869061251fSJaakko Heinonen 			g_topology_unlock();
1879061251fSJaakko Heinonen 			return (error);
1889061251fSJaakko Heinonen 		}
1899061251fSJaakko Heinonen 	}
1909061251fSJaakko Heinonen 	/* Wait for withering to finish. */
191e26bafdcSPoul-Henning Kamp 	for (;;) {
192e26bafdcSPoul-Henning Kamp 		gp = LIST_FIRST(&mp->geom);
193e26bafdcSPoul-Henning Kamp 		if (gp == NULL)
194e26bafdcSPoul-Henning Kamp 			break;
1959061251fSJaakko Heinonen 		KASSERT(gp->flags & G_GEOM_WITHER,
1969061251fSJaakko Heinonen 		   ("Non-withering geom in class %s", mp->name));
1979061251fSJaakko Heinonen 		g_topology_sleep(mp, 1);
1986c87f8d5SPoul-Henning Kamp 	}
1999061251fSJaakko Heinonen 	G_VALID_CLASS(mp);
2006c87f8d5SPoul-Henning Kamp 	if (mp->fini != NULL)
2016c87f8d5SPoul-Henning Kamp 		mp->fini(mp);
2020ecc7670SPoul-Henning Kamp 	LIST_REMOVE(mp, class);
2039061251fSJaakko Heinonen 	g_topology_unlock();
2049061251fSJaakko Heinonen 
2059061251fSJaakko Heinonen 	return (0);
2066c87f8d5SPoul-Henning Kamp }
2076c87f8d5SPoul-Henning Kamp 
2086c87f8d5SPoul-Henning Kamp int
2096c87f8d5SPoul-Henning Kamp g_modevent(module_t mod, int type, void *data)
2106c87f8d5SPoul-Henning Kamp {
2116c87f8d5SPoul-Henning Kamp 	struct g_hh00 *hh;
2126c87f8d5SPoul-Henning Kamp 	int error;
2136c87f8d5SPoul-Henning Kamp 	static int g_ignition;
214dd66958eSPoul-Henning Kamp 	struct g_class *mp;
215dd84a43cSPoul-Henning Kamp 
216dd66958eSPoul-Henning Kamp 	mp = data;
21707f076feSPoul-Henning Kamp 	if (mp->version != G_VERSION) {
218dd66958eSPoul-Henning Kamp 		printf("GEOM class %s has Wrong version %x\n",
219dd66958eSPoul-Henning Kamp 		    mp->name, mp->version);
220dd66958eSPoul-Henning Kamp 		return (EINVAL);
221dd66958eSPoul-Henning Kamp 	}
222dd84a43cSPoul-Henning Kamp 	if (!g_ignition) {
223dd84a43cSPoul-Henning Kamp 		g_ignition++;
224dd84a43cSPoul-Henning Kamp 		g_init();
225dd84a43cSPoul-Henning Kamp 	}
2266c87f8d5SPoul-Henning Kamp 	error = EOPNOTSUPP;
2276c87f8d5SPoul-Henning Kamp 	switch (type) {
2286c87f8d5SPoul-Henning Kamp 	case MOD_LOAD:
2299061251fSJaakko Heinonen 		g_trace(G_T_TOPOLOGY, "g_modevent(%s, LOAD)", mp->name);
2309061251fSJaakko Heinonen 		hh = g_malloc(sizeof *hh, M_WAITOK | M_ZERO);
2319061251fSJaakko Heinonen 		hh->mp = mp;
2326f299fa3SBrian Feldman 		/*
2336f299fa3SBrian Feldman 		 * Once the system is not cold, MOD_LOAD calls will be
2346f299fa3SBrian Feldman 		 * from the userland and the g_event thread will be able
2356f299fa3SBrian Feldman 		 * to acknowledge their completion.
2366f299fa3SBrian Feldman 		 */
237f96c8ef1SAndrew R. Reiter 		if (cold) {
238f96c8ef1SAndrew R. Reiter 			hh->post = 1;
239f96c8ef1SAndrew R. Reiter 			error = g_post_event(g_load_class, hh, M_WAITOK, NULL);
240f96c8ef1SAndrew R. Reiter 		} else {
241f96c8ef1SAndrew R. Reiter 			error = g_waitfor_event(g_load_class, hh, M_WAITOK,
242f96c8ef1SAndrew R. Reiter 			    NULL);
243f96c8ef1SAndrew R. Reiter 			if (error == 0)
244f96c8ef1SAndrew R. Reiter 				error = hh->error;
245f96c8ef1SAndrew R. Reiter 			g_free(hh);
246f96c8ef1SAndrew R. Reiter 		}
2476c87f8d5SPoul-Henning Kamp 		break;
2486c87f8d5SPoul-Henning Kamp 	case MOD_UNLOAD:
2499061251fSJaakko Heinonen 		g_trace(G_T_TOPOLOGY, "g_modevent(%s, UNLOAD)", mp->name);
2509061251fSJaakko Heinonen 		DROP_GIANT();
2519061251fSJaakko Heinonen 		error = g_unload_class(mp);
2529061251fSJaakko Heinonen 		PICKUP_GIANT();
2531f75de94SPoul-Henning Kamp 		if (error == 0) {
2549061251fSJaakko Heinonen 			KASSERT(LIST_EMPTY(&mp->geom),
2559061251fSJaakko Heinonen 			    ("Unloaded class (%s) still has geom", mp->name));
2561f75de94SPoul-Henning Kamp 		}
257f5b34814SPoul-Henning Kamp 		break;
2586c87f8d5SPoul-Henning Kamp 	}
2596c87f8d5SPoul-Henning Kamp 	return (error);
260dd84a43cSPoul-Henning Kamp }
261dd84a43cSPoul-Henning Kamp 
2628a8fcb00SMarcel Moolenaar static void
2638a8fcb00SMarcel Moolenaar g_retaste_event(void *arg, int flag)
2648a8fcb00SMarcel Moolenaar {
2653631c638SAlexander Motin 	struct g_class *mp, *mp2;
2663631c638SAlexander Motin 	struct g_geom *gp;
2678a8fcb00SMarcel Moolenaar 	struct g_hh00 *hh;
2688a8fcb00SMarcel Moolenaar 	struct g_provider *pp;
2693631c638SAlexander Motin 	struct g_consumer *cp;
2708a8fcb00SMarcel Moolenaar 
2718a8fcb00SMarcel Moolenaar 	g_topology_assert();
2728a8fcb00SMarcel Moolenaar 	if (flag == EV_CANCEL)  /* XXX: can't happen ? */
2738a8fcb00SMarcel Moolenaar 		return;
2748a8fcb00SMarcel Moolenaar 	if (g_shutdown)
2758a8fcb00SMarcel Moolenaar 		return;
2768a8fcb00SMarcel Moolenaar 
2778a8fcb00SMarcel Moolenaar 	hh = arg;
2788a8fcb00SMarcel Moolenaar 	mp = hh->mp;
2798a8fcb00SMarcel Moolenaar 	hh->error = 0;
2808a8fcb00SMarcel Moolenaar 	if (hh->post) {
2818a8fcb00SMarcel Moolenaar 		g_free(hh);
2828a8fcb00SMarcel Moolenaar 		hh = NULL;
2838a8fcb00SMarcel Moolenaar 	}
2848a8fcb00SMarcel Moolenaar 	g_trace(G_T_TOPOLOGY, "g_retaste(%s)", mp->name);
2858a8fcb00SMarcel Moolenaar 
2863631c638SAlexander Motin 	LIST_FOREACH(mp2, &g_classes, class) {
2873631c638SAlexander Motin 		LIST_FOREACH(gp, &mp2->geom, geom) {
2888a8fcb00SMarcel Moolenaar 			LIST_FOREACH(pp, &gp->provider, provider) {
2898a8fcb00SMarcel Moolenaar 				if (pp->acr || pp->acw || pp->ace)
2908a8fcb00SMarcel Moolenaar 					continue;
2913631c638SAlexander Motin 				LIST_FOREACH(cp, &pp->consumers, consumers) {
2923631c638SAlexander Motin 					if (cp->geom->class == mp &&
2933631c638SAlexander Motin 					    (cp->flags & G_CF_ORPHAN) == 0)
294856744baSMarcel Moolenaar 						break;
295856744baSMarcel Moolenaar 				}
2963631c638SAlexander Motin 				if (cp != NULL) {
2973631c638SAlexander Motin 					cp->flags |= G_CF_ORPHAN;
2983631c638SAlexander Motin 					g_wither_geom(cp->geom, ENXIO);
2993631c638SAlexander Motin 				}
3008a8fcb00SMarcel Moolenaar 				mp->taste(mp, pp, 0);
3018a8fcb00SMarcel Moolenaar 				g_topology_assert();
3028a8fcb00SMarcel Moolenaar 			}
3038a8fcb00SMarcel Moolenaar 		}
3048a8fcb00SMarcel Moolenaar 	}
3058a8fcb00SMarcel Moolenaar }
3068a8fcb00SMarcel Moolenaar 
3078a8fcb00SMarcel Moolenaar int
3088a8fcb00SMarcel Moolenaar g_retaste(struct g_class *mp)
3098a8fcb00SMarcel Moolenaar {
3108a8fcb00SMarcel Moolenaar 	struct g_hh00 *hh;
3118a8fcb00SMarcel Moolenaar 	int error;
3128a8fcb00SMarcel Moolenaar 
3138a8fcb00SMarcel Moolenaar 	if (mp->taste == NULL)
3148a8fcb00SMarcel Moolenaar 		return (EINVAL);
3158a8fcb00SMarcel Moolenaar 
3168a8fcb00SMarcel Moolenaar 	hh = g_malloc(sizeof *hh, M_WAITOK | M_ZERO);
3178a8fcb00SMarcel Moolenaar 	hh->mp = mp;
3188a8fcb00SMarcel Moolenaar 
3198a8fcb00SMarcel Moolenaar 	if (cold) {
3208a8fcb00SMarcel Moolenaar 		hh->post = 1;
3218a8fcb00SMarcel Moolenaar 		error = g_post_event(g_retaste_event, hh, M_WAITOK, NULL);
3228a8fcb00SMarcel Moolenaar 	} else {
3238a8fcb00SMarcel Moolenaar 		error = g_waitfor_event(g_retaste_event, hh, M_WAITOK, NULL);
3248a8fcb00SMarcel Moolenaar 		if (error == 0)
3258a8fcb00SMarcel Moolenaar 			error = hh->error;
3268a8fcb00SMarcel Moolenaar 		g_free(hh);
3278a8fcb00SMarcel Moolenaar 	}
3288a8fcb00SMarcel Moolenaar 
3298a8fcb00SMarcel Moolenaar 	return (error);
3308a8fcb00SMarcel Moolenaar }
3318a8fcb00SMarcel Moolenaar 
332dd84a43cSPoul-Henning Kamp struct g_geom *
3330f9d3dbaSPoul-Henning Kamp g_new_geomf(struct g_class *mp, const char *fmt, ...)
334dd84a43cSPoul-Henning Kamp {
335dd84a43cSPoul-Henning Kamp 	struct g_geom *gp;
336dd84a43cSPoul-Henning Kamp 	va_list ap;
337dd84a43cSPoul-Henning Kamp 	struct sbuf *sb;
338dd84a43cSPoul-Henning Kamp 
339dd84a43cSPoul-Henning Kamp 	g_topology_assert();
3403d1d5bc3SPoul-Henning Kamp 	G_VALID_CLASS(mp);
3412616144eSDag-Erling Smørgrav 	sb = sbuf_new_auto();
342a1a9b445SPoul-Henning Kamp 	va_start(ap, fmt);
343dd84a43cSPoul-Henning Kamp 	sbuf_vprintf(sb, fmt, ap);
344a1a9b445SPoul-Henning Kamp 	va_end(ap);
345dd84a43cSPoul-Henning Kamp 	sbuf_finish(sb);
346a163d034SWarner Losh 	gp = g_malloc(sizeof *gp, M_WAITOK | M_ZERO);
347a163d034SWarner Losh 	gp->name = g_malloc(sbuf_len(sb) + 1, M_WAITOK | M_ZERO);
348e805e8f0SPoul-Henning Kamp 	gp->class = mp;
349dd84a43cSPoul-Henning Kamp 	gp->rank = 1;
350dd84a43cSPoul-Henning Kamp 	LIST_INIT(&gp->consumer);
351dd84a43cSPoul-Henning Kamp 	LIST_INIT(&gp->provider);
352dd84a43cSPoul-Henning Kamp 	LIST_INSERT_HEAD(&mp->geom, gp, geom);
353dd84a43cSPoul-Henning Kamp 	TAILQ_INSERT_HEAD(&geoms, gp, geoms);
354dd84a43cSPoul-Henning Kamp 	strcpy(gp->name, sbuf_data(sb));
355dd84a43cSPoul-Henning Kamp 	sbuf_delete(sb);
356dd66958eSPoul-Henning Kamp 	/* Fill in defaults from class */
357dd66958eSPoul-Henning Kamp 	gp->start = mp->start;
358dd66958eSPoul-Henning Kamp 	gp->spoiled = mp->spoiled;
359416494d7SJustin T. Gibbs 	gp->attrchanged = mp->attrchanged;
360c3fb2891SKenneth D. Merry 	gp->providergone = mp->providergone;
361dd66958eSPoul-Henning Kamp 	gp->dumpconf = mp->dumpconf;
362dd66958eSPoul-Henning Kamp 	gp->access = mp->access;
363dd66958eSPoul-Henning Kamp 	gp->orphan = mp->orphan;
364dd66958eSPoul-Henning Kamp 	gp->ioctl = mp->ioctl;
365245899ccSEdward Tomasz Napierala 	gp->resize = mp->resize;
366dd84a43cSPoul-Henning Kamp 	return (gp);
367dd84a43cSPoul-Henning Kamp }
368dd84a43cSPoul-Henning Kamp 
369dd84a43cSPoul-Henning Kamp void
370dd84a43cSPoul-Henning Kamp g_destroy_geom(struct g_geom *gp)
371dd84a43cSPoul-Henning Kamp {
372dd84a43cSPoul-Henning Kamp 
373dd84a43cSPoul-Henning Kamp 	g_topology_assert();
3743d1d5bc3SPoul-Henning Kamp 	G_VALID_GEOM(gp);
3753d1d5bc3SPoul-Henning Kamp 	g_trace(G_T_TOPOLOGY, "g_destroy_geom(%p(%s))", gp, gp->name);
376dd84a43cSPoul-Henning Kamp 	KASSERT(LIST_EMPTY(&gp->consumer),
377dd84a43cSPoul-Henning Kamp 	    ("g_destroy_geom(%s) with consumer(s) [%p]",
378dd84a43cSPoul-Henning Kamp 	    gp->name, LIST_FIRST(&gp->consumer)));
379dd84a43cSPoul-Henning Kamp 	KASSERT(LIST_EMPTY(&gp->provider),
380dd84a43cSPoul-Henning Kamp 	    ("g_destroy_geom(%s) with provider(s) [%p]",
381cbb65040SPoul-Henning Kamp 	    gp->name, LIST_FIRST(&gp->provider)));
382afcbcfaeSPoul-Henning Kamp 	g_cancel_event(gp);
383dd84a43cSPoul-Henning Kamp 	LIST_REMOVE(gp, geom);
384dd84a43cSPoul-Henning Kamp 	TAILQ_REMOVE(&geoms, gp, geoms);
3857d590cc4SPoul-Henning Kamp 	g_free(gp->name);
386dd84a43cSPoul-Henning Kamp 	g_free(gp);
387dd84a43cSPoul-Henning Kamp }
388dd84a43cSPoul-Henning Kamp 
389d6227ae7SPoul-Henning Kamp /*
390fa13e9bbSUlf Lilleengen  * This function is called (repeatedly) until the geom has withered away.
391d6227ae7SPoul-Henning Kamp  */
392d6227ae7SPoul-Henning Kamp void
393d6227ae7SPoul-Henning Kamp g_wither_geom(struct g_geom *gp, int error)
394d6227ae7SPoul-Henning Kamp {
3951b464bd8SPoul-Henning Kamp 	struct g_provider *pp;
396d6227ae7SPoul-Henning Kamp 
3973d1d5bc3SPoul-Henning Kamp 	g_topology_assert();
3983d1d5bc3SPoul-Henning Kamp 	G_VALID_GEOM(gp);
399d6227ae7SPoul-Henning Kamp 	g_trace(G_T_TOPOLOGY, "g_wither_geom(%p(%s))", gp, gp->name);
400d6227ae7SPoul-Henning Kamp 	if (!(gp->flags & G_GEOM_WITHER)) {
401d6227ae7SPoul-Henning Kamp 		gp->flags |= G_GEOM_WITHER;
402d6227ae7SPoul-Henning Kamp 		LIST_FOREACH(pp, &gp->provider, provider)
403b07ef6c2SPoul-Henning Kamp 			if (!(pp->flags & G_PF_ORPHAN))
404d6227ae7SPoul-Henning Kamp 				g_orphan_provider(pp, error);
405d6227ae7SPoul-Henning Kamp 	}
4061b464bd8SPoul-Henning Kamp 	g_do_wither();
407d6227ae7SPoul-Henning Kamp }
4081b464bd8SPoul-Henning Kamp 
4091b464bd8SPoul-Henning Kamp /*
410d99c1559SMarcel Moolenaar  * Convenience function to destroy a particular provider.
411d99c1559SMarcel Moolenaar  */
412d99c1559SMarcel Moolenaar void
413d99c1559SMarcel Moolenaar g_wither_provider(struct g_provider *pp, int error)
414d99c1559SMarcel Moolenaar {
415d99c1559SMarcel Moolenaar 
416d99c1559SMarcel Moolenaar 	pp->flags |= G_PF_WITHER;
417d99c1559SMarcel Moolenaar 	if (!(pp->flags & G_PF_ORPHAN))
418d99c1559SMarcel Moolenaar 		g_orphan_provider(pp, error);
419d99c1559SMarcel Moolenaar }
420d99c1559SMarcel Moolenaar 
421d99c1559SMarcel Moolenaar /*
422725419afSPoul-Henning Kamp  * This function is called (repeatedly) until the has withered away.
423725419afSPoul-Henning Kamp  */
424725419afSPoul-Henning Kamp void
425725419afSPoul-Henning Kamp g_wither_geom_close(struct g_geom *gp, int error)
426725419afSPoul-Henning Kamp {
427725419afSPoul-Henning Kamp 	struct g_consumer *cp;
428725419afSPoul-Henning Kamp 
429725419afSPoul-Henning Kamp 	g_topology_assert();
430725419afSPoul-Henning Kamp 	G_VALID_GEOM(gp);
431725419afSPoul-Henning Kamp 	g_trace(G_T_TOPOLOGY, "g_wither_geom_close(%p(%s))", gp, gp->name);
432725419afSPoul-Henning Kamp 	LIST_FOREACH(cp, &gp->consumer, consumer)
433725419afSPoul-Henning Kamp 		if (cp->acr || cp->acw || cp->ace)
434725419afSPoul-Henning Kamp 			g_access(cp, -cp->acr, -cp->acw, -cp->ace);
435725419afSPoul-Henning Kamp 	g_wither_geom(gp, error);
436725419afSPoul-Henning Kamp }
437725419afSPoul-Henning Kamp 
438725419afSPoul-Henning Kamp /*
4391b464bd8SPoul-Henning Kamp  * This function is called (repeatedly) until we cant wash away more
4401b464bd8SPoul-Henning Kamp  * withered bits at present.  Return value contains two bits.  Bit 0
4411b464bd8SPoul-Henning Kamp  * set means "withering stuff we can't wash now", bit 1 means "call
4421b464bd8SPoul-Henning Kamp  * me again, there may be stuff I didn't get the first time around.
4431b464bd8SPoul-Henning Kamp  */
4441b464bd8SPoul-Henning Kamp int
4451b464bd8SPoul-Henning Kamp g_wither_washer()
4461b464bd8SPoul-Henning Kamp {
4471b464bd8SPoul-Henning Kamp 	struct g_class *mp;
4481b464bd8SPoul-Henning Kamp 	struct g_geom *gp, *gp2;
4491b464bd8SPoul-Henning Kamp 	struct g_provider *pp, *pp2;
4501b464bd8SPoul-Henning Kamp 	struct g_consumer *cp, *cp2;
4511b464bd8SPoul-Henning Kamp 	int result;
4521b464bd8SPoul-Henning Kamp 
4531b464bd8SPoul-Henning Kamp 	result = 0;
4541b464bd8SPoul-Henning Kamp 	g_topology_assert();
4551b464bd8SPoul-Henning Kamp 	LIST_FOREACH(mp, &g_classes, class) {
4561b464bd8SPoul-Henning Kamp 		LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
4571b464bd8SPoul-Henning Kamp 			LIST_FOREACH_SAFE(pp, &gp->provider, provider, pp2) {
4581b464bd8SPoul-Henning Kamp 				if (!(pp->flags & G_PF_WITHER))
459d6227ae7SPoul-Henning Kamp 					continue;
4601b464bd8SPoul-Henning Kamp 				if (LIST_EMPTY(&pp->consumers))
4611b464bd8SPoul-Henning Kamp 					g_destroy_provider(pp);
4621b464bd8SPoul-Henning Kamp 				else
4631b464bd8SPoul-Henning Kamp 					result |= 1;
4641b464bd8SPoul-Henning Kamp 			}
4651b464bd8SPoul-Henning Kamp 			if (!(gp->flags & G_GEOM_WITHER))
4661b464bd8SPoul-Henning Kamp 				continue;
4671b464bd8SPoul-Henning Kamp 			LIST_FOREACH_SAFE(pp, &gp->provider, provider, pp2) {
4681b464bd8SPoul-Henning Kamp 				if (LIST_EMPTY(&pp->consumers))
4691b464bd8SPoul-Henning Kamp 					g_destroy_provider(pp);
4701b464bd8SPoul-Henning Kamp 				else
4711b464bd8SPoul-Henning Kamp 					result |= 1;
4721b464bd8SPoul-Henning Kamp 			}
4731b464bd8SPoul-Henning Kamp 			LIST_FOREACH_SAFE(cp, &gp->consumer, consumer, cp2) {
4741b464bd8SPoul-Henning Kamp 				if (cp->acr || cp->acw || cp->ace) {
4751b464bd8SPoul-Henning Kamp 					result |= 1;
4761b464bd8SPoul-Henning Kamp 					continue;
4771b464bd8SPoul-Henning Kamp 				}
478539bec40SPoul-Henning Kamp 				if (cp->provider != NULL)
479d6227ae7SPoul-Henning Kamp 					g_detach(cp);
480d6227ae7SPoul-Henning Kamp 				g_destroy_consumer(cp);
4811b464bd8SPoul-Henning Kamp 				result |= 2;
482d6227ae7SPoul-Henning Kamp 			}
4831b464bd8SPoul-Henning Kamp 			if (LIST_EMPTY(&gp->provider) &&
4841b464bd8SPoul-Henning Kamp 			    LIST_EMPTY(&gp->consumer))
485d6227ae7SPoul-Henning Kamp 				g_destroy_geom(gp);
4861b464bd8SPoul-Henning Kamp 			else
4871b464bd8SPoul-Henning Kamp 				result |= 1;
4881b464bd8SPoul-Henning Kamp 		}
4891b464bd8SPoul-Henning Kamp 	}
4901b464bd8SPoul-Henning Kamp 	return (result);
491d6227ae7SPoul-Henning Kamp }
492d6227ae7SPoul-Henning Kamp 
493dd84a43cSPoul-Henning Kamp struct g_consumer *
494dd84a43cSPoul-Henning Kamp g_new_consumer(struct g_geom *gp)
495dd84a43cSPoul-Henning Kamp {
496dd84a43cSPoul-Henning Kamp 	struct g_consumer *cp;
497dd84a43cSPoul-Henning Kamp 
498dd84a43cSPoul-Henning Kamp 	g_topology_assert();
4993d1d5bc3SPoul-Henning Kamp 	G_VALID_GEOM(gp);
500799426f8SPoul-Henning Kamp 	KASSERT(!(gp->flags & G_GEOM_WITHER),
501799426f8SPoul-Henning Kamp 	    ("g_new_consumer on WITHERing geom(%s) (class %s)",
502799426f8SPoul-Henning Kamp 	    gp->name, gp->class->name));
50307d77fc6SPoul-Henning Kamp 	KASSERT(gp->orphan != NULL,
50407d77fc6SPoul-Henning Kamp 	    ("g_new_consumer on geom(%s) (class %s) without orphan",
50507d77fc6SPoul-Henning Kamp 	    gp->name, gp->class->name));
506dd84a43cSPoul-Henning Kamp 
507a163d034SWarner Losh 	cp = g_malloc(sizeof *cp, M_WAITOK | M_ZERO);
508dd84a43cSPoul-Henning Kamp 	cp->geom = gp;
509e24cbd90SPoul-Henning Kamp 	cp->stat = devstat_new_entry(cp, -1, 0, DEVSTAT_ALL_SUPPORTED,
510e24cbd90SPoul-Henning Kamp 	    DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
511dd84a43cSPoul-Henning Kamp 	LIST_INSERT_HEAD(&gp->consumer, cp, consumer);
512dd84a43cSPoul-Henning Kamp 	return(cp);
513dd84a43cSPoul-Henning Kamp }
514dd84a43cSPoul-Henning Kamp 
515dd84a43cSPoul-Henning Kamp void
516dd84a43cSPoul-Henning Kamp g_destroy_consumer(struct g_consumer *cp)
517dd84a43cSPoul-Henning Kamp {
518d6227ae7SPoul-Henning Kamp 	struct g_geom *gp;
519dd84a43cSPoul-Henning Kamp 
520dd84a43cSPoul-Henning Kamp 	g_topology_assert();
5213d1d5bc3SPoul-Henning Kamp 	G_VALID_CONSUMER(cp);
5223d1d5bc3SPoul-Henning Kamp 	g_trace(G_T_TOPOLOGY, "g_destroy_consumer(%p)", cp);
523dd84a43cSPoul-Henning Kamp 	KASSERT (cp->provider == NULL, ("g_destroy_consumer but attached"));
524dd84a43cSPoul-Henning Kamp 	KASSERT (cp->acr == 0, ("g_destroy_consumer with acr"));
525dd84a43cSPoul-Henning Kamp 	KASSERT (cp->acw == 0, ("g_destroy_consumer with acw"));
526dd84a43cSPoul-Henning Kamp 	KASSERT (cp->ace == 0, ("g_destroy_consumer with ace"));
527afcbcfaeSPoul-Henning Kamp 	g_cancel_event(cp);
528d6227ae7SPoul-Henning Kamp 	gp = cp->geom;
529dd84a43cSPoul-Henning Kamp 	LIST_REMOVE(cp, consumer);
530e24cbd90SPoul-Henning Kamp 	devstat_remove_entry(cp->stat);
531dd84a43cSPoul-Henning Kamp 	g_free(cp);
532d6227ae7SPoul-Henning Kamp 	if (gp->flags & G_GEOM_WITHER)
5331b464bd8SPoul-Henning Kamp 		g_do_wither();
534dd84a43cSPoul-Henning Kamp }
535dd84a43cSPoul-Henning Kamp 
5369ab3ea78SPoul-Henning Kamp static void
5379ab3ea78SPoul-Henning Kamp g_new_provider_event(void *arg, int flag)
5389ab3ea78SPoul-Henning Kamp {
5399ab3ea78SPoul-Henning Kamp 	struct g_class *mp;
5409ab3ea78SPoul-Henning Kamp 	struct g_provider *pp;
5413631c638SAlexander Motin 	struct g_consumer *cp, *next_cp;
5429ab3ea78SPoul-Henning Kamp 
5439ab3ea78SPoul-Henning Kamp 	g_topology_assert();
5449ab3ea78SPoul-Henning Kamp 	if (flag == EV_CANCEL)
5459ab3ea78SPoul-Henning Kamp 		return;
5469ab3ea78SPoul-Henning Kamp 	if (g_shutdown)
5479ab3ea78SPoul-Henning Kamp 		return;
5489ab3ea78SPoul-Henning Kamp 	pp = arg;
5493d1d5bc3SPoul-Henning Kamp 	G_VALID_PROVIDER(pp);
5509097a8e6SPawel Jakub Dawidek 	KASSERT(!(pp->flags & G_PF_WITHER),
5519097a8e6SPawel Jakub Dawidek 	    ("g_new_provider_event but withered"));
5523631c638SAlexander Motin 	LIST_FOREACH_SAFE(cp, &pp->consumers, consumers, next_cp) {
5533631c638SAlexander Motin 		if ((cp->flags & G_CF_ORPHAN) == 0 &&
5543631c638SAlexander Motin 		    cp->geom->attrchanged != NULL)
5553631c638SAlexander Motin 			cp->geom->attrchanged(cp, "GEOM::media");
5563631c638SAlexander Motin 	}
5579ab3ea78SPoul-Henning Kamp 	LIST_FOREACH(mp, &g_classes, class) {
5589ab3ea78SPoul-Henning Kamp 		if (mp->taste == NULL)
5599ab3ea78SPoul-Henning Kamp 			continue;
5609ab3ea78SPoul-Henning Kamp 		LIST_FOREACH(cp, &pp->consumers, consumers)
5613631c638SAlexander Motin 			if (cp->geom->class == mp &&
5623631c638SAlexander Motin 			    (cp->flags & G_CF_ORPHAN) == 0)
563cb9b72ceSPawel Jakub Dawidek 				break;
564cb9b72ceSPawel Jakub Dawidek 		if (cp != NULL)
5659ab3ea78SPoul-Henning Kamp 			continue;
566c4da4e46SPoul-Henning Kamp 		mp->taste(mp, pp, 0);
5679ab3ea78SPoul-Henning Kamp 		g_topology_assert();
5689ab3ea78SPoul-Henning Kamp 	}
5699ab3ea78SPoul-Henning Kamp }
5709ab3ea78SPoul-Henning Kamp 
5719ab3ea78SPoul-Henning Kamp 
572dd84a43cSPoul-Henning Kamp struct g_provider *
5730f9d3dbaSPoul-Henning Kamp g_new_providerf(struct g_geom *gp, const char *fmt, ...)
574dd84a43cSPoul-Henning Kamp {
575dd84a43cSPoul-Henning Kamp 	struct g_provider *pp;
576dd84a43cSPoul-Henning Kamp 	struct sbuf *sb;
577dd84a43cSPoul-Henning Kamp 	va_list ap;
578dd84a43cSPoul-Henning Kamp 
579dd84a43cSPoul-Henning Kamp 	g_topology_assert();
5803d1d5bc3SPoul-Henning Kamp 	G_VALID_GEOM(gp);
581e26bafdcSPoul-Henning Kamp 	KASSERT(gp->access != NULL,
582e26bafdcSPoul-Henning Kamp 	    ("new provider on geom(%s) without ->access (class %s)",
583e26bafdcSPoul-Henning Kamp 	    gp->name, gp->class->name));
584799426f8SPoul-Henning Kamp 	KASSERT(gp->start != NULL,
585cff2ddaeSPawel Jakub Dawidek 	    ("new provider on geom(%s) without ->start (class %s)",
586cff2ddaeSPawel Jakub Dawidek 	    gp->name, gp->class->name));
587799426f8SPoul-Henning Kamp 	KASSERT(!(gp->flags & G_GEOM_WITHER),
588cff2ddaeSPawel Jakub Dawidek 	    ("new provider on WITHERing geom(%s) (class %s)",
589cff2ddaeSPawel Jakub Dawidek 	    gp->name, gp->class->name));
5902616144eSDag-Erling Smørgrav 	sb = sbuf_new_auto();
591a1a9b445SPoul-Henning Kamp 	va_start(ap, fmt);
592dd84a43cSPoul-Henning Kamp 	sbuf_vprintf(sb, fmt, ap);
593a1a9b445SPoul-Henning Kamp 	va_end(ap);
594dd84a43cSPoul-Henning Kamp 	sbuf_finish(sb);
595a163d034SWarner Losh 	pp = g_malloc(sizeof *pp + sbuf_len(sb) + 1, M_WAITOK | M_ZERO);
596dd84a43cSPoul-Henning Kamp 	pp->name = (char *)(pp + 1);
597dd84a43cSPoul-Henning Kamp 	strcpy(pp->name, sbuf_data(sb));
598dd84a43cSPoul-Henning Kamp 	sbuf_delete(sb);
599dd84a43cSPoul-Henning Kamp 	LIST_INIT(&pp->consumers);
600dd84a43cSPoul-Henning Kamp 	pp->error = ENXIO;
601dd84a43cSPoul-Henning Kamp 	pp->geom = gp;
602e24cbd90SPoul-Henning Kamp 	pp->stat = devstat_new_entry(pp, -1, 0, DEVSTAT_ALL_SUPPORTED,
603e24cbd90SPoul-Henning Kamp 	    DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
604dd84a43cSPoul-Henning Kamp 	LIST_INSERT_HEAD(&gp->provider, pp, provider);
605e26bafdcSPoul-Henning Kamp 	g_post_event(g_new_provider_event, pp, M_WAITOK, pp, gp, NULL);
606dd84a43cSPoul-Henning Kamp 	return (pp);
607dd84a43cSPoul-Henning Kamp }
608dd84a43cSPoul-Henning Kamp 
609dd84a43cSPoul-Henning Kamp void
610dd84a43cSPoul-Henning Kamp g_error_provider(struct g_provider *pp, int error)
611dd84a43cSPoul-Henning Kamp {
612dd84a43cSPoul-Henning Kamp 
6133d1d5bc3SPoul-Henning Kamp 	/* G_VALID_PROVIDER(pp);  We may not have g_topology */
614dd84a43cSPoul-Henning Kamp 	pp->error = error;
615dd84a43cSPoul-Henning Kamp }
616dd84a43cSPoul-Henning Kamp 
617245899ccSEdward Tomasz Napierala static void
618245899ccSEdward Tomasz Napierala g_resize_provider_event(void *arg, int flag)
619245899ccSEdward Tomasz Napierala {
620245899ccSEdward Tomasz Napierala 	struct g_hh00 *hh;
621245899ccSEdward Tomasz Napierala 	struct g_class *mp;
622245899ccSEdward Tomasz Napierala 	struct g_geom *gp;
623245899ccSEdward Tomasz Napierala 	struct g_provider *pp;
624245899ccSEdward Tomasz Napierala 	struct g_consumer *cp, *cp2;
625245899ccSEdward Tomasz Napierala 	off_t size;
626245899ccSEdward Tomasz Napierala 
627245899ccSEdward Tomasz Napierala 	g_topology_assert();
628245899ccSEdward Tomasz Napierala 	if (g_shutdown)
629245899ccSEdward Tomasz Napierala 		return;
630245899ccSEdward Tomasz Napierala 
631245899ccSEdward Tomasz Napierala 	hh = arg;
632245899ccSEdward Tomasz Napierala 	pp = hh->pp;
633245899ccSEdward Tomasz Napierala 	size = hh->size;
6343a3ef28eSEdward Tomasz Napierala 	g_free(hh);
635245899ccSEdward Tomasz Napierala 
636245899ccSEdward Tomasz Napierala 	G_VALID_PROVIDER(pp);
637245899ccSEdward Tomasz Napierala 	g_trace(G_T_TOPOLOGY, "g_resize_provider_event(%p)", pp);
638245899ccSEdward Tomasz Napierala 
639245899ccSEdward Tomasz Napierala 	LIST_FOREACH_SAFE(cp, &pp->consumers, consumers, cp2) {
640245899ccSEdward Tomasz Napierala 		gp = cp->geom;
6413631c638SAlexander Motin 		if (gp->resize == NULL && size < pp->mediasize) {
6423631c638SAlexander Motin 			cp->flags |= G_CF_ORPHAN;
643245899ccSEdward Tomasz Napierala 			cp->geom->orphan(cp);
644245899ccSEdward Tomasz Napierala 		}
6453631c638SAlexander Motin 	}
646245899ccSEdward Tomasz Napierala 
647245899ccSEdward Tomasz Napierala 	pp->mediasize = size;
648245899ccSEdward Tomasz Napierala 
649245899ccSEdward Tomasz Napierala 	LIST_FOREACH_SAFE(cp, &pp->consumers, consumers, cp2) {
650245899ccSEdward Tomasz Napierala 		gp = cp->geom;
651245899ccSEdward Tomasz Napierala 		if (gp->resize != NULL)
652245899ccSEdward Tomasz Napierala 			gp->resize(cp);
653245899ccSEdward Tomasz Napierala 	}
654245899ccSEdward Tomasz Napierala 
655245899ccSEdward Tomasz Napierala 	/*
656245899ccSEdward Tomasz Napierala 	 * After resizing, the previously invalid GEOM class metadata
657245899ccSEdward Tomasz Napierala 	 * might become valid.  This means we should retaste.
658245899ccSEdward Tomasz Napierala 	 */
659245899ccSEdward Tomasz Napierala 	LIST_FOREACH(mp, &g_classes, class) {
660245899ccSEdward Tomasz Napierala 		if (mp->taste == NULL)
661245899ccSEdward Tomasz Napierala 			continue;
662245899ccSEdward Tomasz Napierala 		LIST_FOREACH(cp, &pp->consumers, consumers)
6633631c638SAlexander Motin 			if (cp->geom->class == mp &&
6643631c638SAlexander Motin 			    (cp->flags & G_CF_ORPHAN) == 0)
665245899ccSEdward Tomasz Napierala 				break;
666245899ccSEdward Tomasz Napierala 		if (cp != NULL)
667245899ccSEdward Tomasz Napierala 			continue;
668245899ccSEdward Tomasz Napierala 		mp->taste(mp, pp, 0);
669245899ccSEdward Tomasz Napierala 		g_topology_assert();
670245899ccSEdward Tomasz Napierala 	}
671245899ccSEdward Tomasz Napierala }
672245899ccSEdward Tomasz Napierala 
673245899ccSEdward Tomasz Napierala void
674245899ccSEdward Tomasz Napierala g_resize_provider(struct g_provider *pp, off_t size)
675245899ccSEdward Tomasz Napierala {
676245899ccSEdward Tomasz Napierala 	struct g_hh00 *hh;
677245899ccSEdward Tomasz Napierala 
678245899ccSEdward Tomasz Napierala 	G_VALID_PROVIDER(pp);
679245899ccSEdward Tomasz Napierala 
680245899ccSEdward Tomasz Napierala 	if (size == pp->mediasize)
681245899ccSEdward Tomasz Napierala 		return;
682245899ccSEdward Tomasz Napierala 
683245899ccSEdward Tomasz Napierala 	hh = g_malloc(sizeof *hh, M_WAITOK | M_ZERO);
684245899ccSEdward Tomasz Napierala 	hh->pp = pp;
685245899ccSEdward Tomasz Napierala 	hh->size = size;
686245899ccSEdward Tomasz Napierala 	g_post_event(g_resize_provider_event, hh, M_WAITOK, NULL);
687245899ccSEdward Tomasz Napierala }
688245899ccSEdward Tomasz Napierala 
689*769afdc7SPawel Jakub Dawidek #ifndef	_PATH_DEV
690*769afdc7SPawel Jakub Dawidek #define	_PATH_DEV	"/dev/"
691*769afdc7SPawel Jakub Dawidek #endif
692*769afdc7SPawel Jakub Dawidek 
693d6c5e716SPoul-Henning Kamp struct g_provider *
694d6c5e716SPoul-Henning Kamp g_provider_by_name(char const *arg)
695d6c5e716SPoul-Henning Kamp {
696d6c5e716SPoul-Henning Kamp 	struct g_class *cp;
697d6c5e716SPoul-Henning Kamp 	struct g_geom *gp;
698d6c5e716SPoul-Henning Kamp 	struct g_provider *pp;
699d6c5e716SPoul-Henning Kamp 
700*769afdc7SPawel Jakub Dawidek 	if (strncmp(arg, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
701*769afdc7SPawel Jakub Dawidek 		arg += sizeof(_PATH_DEV) - 1;
702*769afdc7SPawel Jakub Dawidek 
703d6c5e716SPoul-Henning Kamp 	LIST_FOREACH(cp, &g_classes, class) {
704d6c5e716SPoul-Henning Kamp 		LIST_FOREACH(gp, &cp->geom, geom) {
705d6c5e716SPoul-Henning Kamp 			LIST_FOREACH(pp, &gp->provider, provider) {
706d6c5e716SPoul-Henning Kamp 				if (!strcmp(arg, pp->name))
707d6c5e716SPoul-Henning Kamp 					return (pp);
708d6c5e716SPoul-Henning Kamp 			}
709d6c5e716SPoul-Henning Kamp 		}
710d6c5e716SPoul-Henning Kamp 	}
711*769afdc7SPawel Jakub Dawidek 
712d6c5e716SPoul-Henning Kamp 	return (NULL);
713d6c5e716SPoul-Henning Kamp }
714dd84a43cSPoul-Henning Kamp 
715dd84a43cSPoul-Henning Kamp void
716dd84a43cSPoul-Henning Kamp g_destroy_provider(struct g_provider *pp)
717dd84a43cSPoul-Henning Kamp {
718dd84a43cSPoul-Henning Kamp 	struct g_geom *gp;
719dd84a43cSPoul-Henning Kamp 
720dd84a43cSPoul-Henning Kamp 	g_topology_assert();
7213d1d5bc3SPoul-Henning Kamp 	G_VALID_PROVIDER(pp);
722dd84a43cSPoul-Henning Kamp 	KASSERT(LIST_EMPTY(&pp->consumers),
723dd84a43cSPoul-Henning Kamp 	    ("g_destroy_provider but attached"));
724dd84a43cSPoul-Henning Kamp 	KASSERT (pp->acr == 0, ("g_destroy_provider with acr"));
725dd84a43cSPoul-Henning Kamp 	KASSERT (pp->acw == 0, ("g_destroy_provider with acw"));
7269097a8e6SPawel Jakub Dawidek 	KASSERT (pp->ace == 0, ("g_destroy_provider with ace"));
727afcbcfaeSPoul-Henning Kamp 	g_cancel_event(pp);
728dd84a43cSPoul-Henning Kamp 	LIST_REMOVE(pp, provider);
729dd84a43cSPoul-Henning Kamp 	gp = pp->geom;
730e24cbd90SPoul-Henning Kamp 	devstat_remove_entry(pp->stat);
731c3fb2891SKenneth D. Merry 	/*
732c3fb2891SKenneth D. Merry 	 * If a callback was provided, send notification that the provider
733c3fb2891SKenneth D. Merry 	 * is now gone.
734c3fb2891SKenneth D. Merry 	 */
735c3fb2891SKenneth D. Merry 	if (gp->providergone != NULL)
736c3fb2891SKenneth D. Merry 		gp->providergone(pp);
737c3fb2891SKenneth D. Merry 
738dd84a43cSPoul-Henning Kamp 	g_free(pp);
739d6227ae7SPoul-Henning Kamp 	if ((gp->flags & G_GEOM_WITHER))
7401b464bd8SPoul-Henning Kamp 		g_do_wither();
741dd84a43cSPoul-Henning Kamp }
742dd84a43cSPoul-Henning Kamp 
743dd84a43cSPoul-Henning Kamp /*
744dd84a43cSPoul-Henning Kamp  * We keep the "geoms" list sorted by topological order (== increasing
745dd84a43cSPoul-Henning Kamp  * numerical rank) at all times.
746dd84a43cSPoul-Henning Kamp  * When an attach is done, the attaching geoms rank is invalidated
747dd84a43cSPoul-Henning Kamp  * and it is moved to the tail of the list.
748dd84a43cSPoul-Henning Kamp  * All geoms later in the sequence has their ranks reevaluated in
749dd84a43cSPoul-Henning Kamp  * sequence.  If we cannot assign rank to a geom because it's
750dd84a43cSPoul-Henning Kamp  * prerequisites do not have rank, we move that element to the tail
751dd84a43cSPoul-Henning Kamp  * of the sequence with invalid rank as well.
752dd84a43cSPoul-Henning Kamp  * At some point we encounter our original geom and if we stil fail
753dd84a43cSPoul-Henning Kamp  * to assign it a rank, there must be a loop and we fail back to
754503abe45SPoul-Henning Kamp  * g_attach() which detach again and calls redo_rank again
755dd84a43cSPoul-Henning Kamp  * to fix up the damage.
756dd84a43cSPoul-Henning Kamp  * It would be much simpler code wise to do it recursively, but we
757dd84a43cSPoul-Henning Kamp  * can't risk that on the kernel stack.
758dd84a43cSPoul-Henning Kamp  */
759dd84a43cSPoul-Henning Kamp 
760dd84a43cSPoul-Henning Kamp static int
761dd84a43cSPoul-Henning Kamp redo_rank(struct g_geom *gp)
762dd84a43cSPoul-Henning Kamp {
763dd84a43cSPoul-Henning Kamp 	struct g_consumer *cp;
764dd84a43cSPoul-Henning Kamp 	struct g_geom *gp1, *gp2;
765dd84a43cSPoul-Henning Kamp 	int n, m;
766dd84a43cSPoul-Henning Kamp 
767dd84a43cSPoul-Henning Kamp 	g_topology_assert();
7683d1d5bc3SPoul-Henning Kamp 	G_VALID_GEOM(gp);
769dd84a43cSPoul-Henning Kamp 
770dd84a43cSPoul-Henning Kamp 	/* Invalidate this geoms rank and move it to the tail */
771dd84a43cSPoul-Henning Kamp 	gp1 = TAILQ_NEXT(gp, geoms);
772dd84a43cSPoul-Henning Kamp 	if (gp1 != NULL) {
773dd84a43cSPoul-Henning Kamp 		gp->rank = 0;
774dd84a43cSPoul-Henning Kamp 		TAILQ_REMOVE(&geoms, gp, geoms);
775dd84a43cSPoul-Henning Kamp 		TAILQ_INSERT_TAIL(&geoms, gp, geoms);
776dd84a43cSPoul-Henning Kamp 	} else {
777dd84a43cSPoul-Henning Kamp 		gp1 = gp;
778dd84a43cSPoul-Henning Kamp 	}
779dd84a43cSPoul-Henning Kamp 
780dd84a43cSPoul-Henning Kamp 	/* re-rank the rest of the sequence */
781dd84a43cSPoul-Henning Kamp 	for (; gp1 != NULL; gp1 = gp2) {
782dd84a43cSPoul-Henning Kamp 		gp1->rank = 0;
783dd84a43cSPoul-Henning Kamp 		m = 1;
784dd84a43cSPoul-Henning Kamp 		LIST_FOREACH(cp, &gp1->consumer, consumer) {
785dd84a43cSPoul-Henning Kamp 			if (cp->provider == NULL)
786dd84a43cSPoul-Henning Kamp 				continue;
787dd84a43cSPoul-Henning Kamp 			n = cp->provider->geom->rank;
788dd84a43cSPoul-Henning Kamp 			if (n == 0) {
789dd84a43cSPoul-Henning Kamp 				m = 0;
790dd84a43cSPoul-Henning Kamp 				break;
791dd84a43cSPoul-Henning Kamp 			} else if (n >= m)
792dd84a43cSPoul-Henning Kamp 				m = n + 1;
793dd84a43cSPoul-Henning Kamp 		}
794dd84a43cSPoul-Henning Kamp 		gp1->rank = m;
795dd84a43cSPoul-Henning Kamp 		gp2 = TAILQ_NEXT(gp1, geoms);
796dd84a43cSPoul-Henning Kamp 
797dd84a43cSPoul-Henning Kamp 		/* got a rank, moving on */
798dd84a43cSPoul-Henning Kamp 		if (m != 0)
799dd84a43cSPoul-Henning Kamp 			continue;
800dd84a43cSPoul-Henning Kamp 
801dd84a43cSPoul-Henning Kamp 		/* no rank to original geom means loop */
80250d866ceSPoul-Henning Kamp 		if (gp == gp1)
803dd84a43cSPoul-Henning Kamp 			return (ELOOP);
804dd84a43cSPoul-Henning Kamp 
805dd84a43cSPoul-Henning Kamp 		/* no rank, put it at the end move on */
806dd84a43cSPoul-Henning Kamp 		TAILQ_REMOVE(&geoms, gp1, geoms);
807dd84a43cSPoul-Henning Kamp 		TAILQ_INSERT_TAIL(&geoms, gp1, geoms);
808dd84a43cSPoul-Henning Kamp 	}
809dd84a43cSPoul-Henning Kamp 	return (0);
810dd84a43cSPoul-Henning Kamp }
811dd84a43cSPoul-Henning Kamp 
812dd84a43cSPoul-Henning Kamp int
813dd84a43cSPoul-Henning Kamp g_attach(struct g_consumer *cp, struct g_provider *pp)
814dd84a43cSPoul-Henning Kamp {
815dd84a43cSPoul-Henning Kamp 	int error;
816dd84a43cSPoul-Henning Kamp 
817dd84a43cSPoul-Henning Kamp 	g_topology_assert();
8183d1d5bc3SPoul-Henning Kamp 	G_VALID_CONSUMER(cp);
8193d1d5bc3SPoul-Henning Kamp 	G_VALID_PROVIDER(pp);
820e5131ab4SPawel Jakub Dawidek 	g_trace(G_T_TOPOLOGY, "g_attach(%p, %p)", cp, pp);
821dd84a43cSPoul-Henning Kamp 	KASSERT(cp->provider == NULL, ("attach but attached"));
822dd84a43cSPoul-Henning Kamp 	cp->provider = pp;
823dd84a43cSPoul-Henning Kamp 	LIST_INSERT_HEAD(&pp->consumers, cp, consumers);
824dd84a43cSPoul-Henning Kamp 	error = redo_rank(cp->geom);
825dd84a43cSPoul-Henning Kamp 	if (error) {
826dd84a43cSPoul-Henning Kamp 		LIST_REMOVE(cp, consumers);
827dd84a43cSPoul-Henning Kamp 		cp->provider = NULL;
828dd84a43cSPoul-Henning Kamp 		redo_rank(cp->geom);
829dd84a43cSPoul-Henning Kamp 	}
830dd84a43cSPoul-Henning Kamp 	return (error);
831dd84a43cSPoul-Henning Kamp }
832dd84a43cSPoul-Henning Kamp 
833dd84a43cSPoul-Henning Kamp void
834503abe45SPoul-Henning Kamp g_detach(struct g_consumer *cp)
835dd84a43cSPoul-Henning Kamp {
836dd84a43cSPoul-Henning Kamp 	struct g_provider *pp;
837dd84a43cSPoul-Henning Kamp 
838dd84a43cSPoul-Henning Kamp 	g_topology_assert();
8393d1d5bc3SPoul-Henning Kamp 	G_VALID_CONSUMER(cp);
8403d1d5bc3SPoul-Henning Kamp 	g_trace(G_T_TOPOLOGY, "g_detach(%p)", cp);
841503abe45SPoul-Henning Kamp 	KASSERT(cp->provider != NULL, ("detach but not attached"));
842503abe45SPoul-Henning Kamp 	KASSERT(cp->acr == 0, ("detach but nonzero acr"));
843503abe45SPoul-Henning Kamp 	KASSERT(cp->acw == 0, ("detach but nonzero acw"));
844503abe45SPoul-Henning Kamp 	KASSERT(cp->ace == 0, ("detach but nonzero ace"));
8450e6be472SPoul-Henning Kamp 	KASSERT(cp->nstart == cp->nend,
8464ec35300SPoul-Henning Kamp 	    ("detach with active requests"));
847dd84a43cSPoul-Henning Kamp 	pp = cp->provider;
848dd84a43cSPoul-Henning Kamp 	LIST_REMOVE(cp, consumers);
849dd84a43cSPoul-Henning Kamp 	cp->provider = NULL;
850dd84a43cSPoul-Henning Kamp 	if (pp->geom->flags & G_GEOM_WITHER)
8511b464bd8SPoul-Henning Kamp 		g_do_wither();
85290916ef7SPoul-Henning Kamp 	else if (pp->flags & G_PF_WITHER)
8531b464bd8SPoul-Henning Kamp 		g_do_wither();
854dd84a43cSPoul-Henning Kamp 	redo_rank(cp->geom);
855dd84a43cSPoul-Henning Kamp }
856dd84a43cSPoul-Henning Kamp 
857dd84a43cSPoul-Henning Kamp /*
858d2bae332SPoul-Henning Kamp  * g_access()
859dd84a43cSPoul-Henning Kamp  *
860dd84a43cSPoul-Henning Kamp  * Access-check with delta values.  The question asked is "can provider
861dd84a43cSPoul-Henning Kamp  * "cp" change the access counters by the relative amounts dc[rwe] ?"
862dd84a43cSPoul-Henning Kamp  */
863dd84a43cSPoul-Henning Kamp 
864dd84a43cSPoul-Henning Kamp int
865d2bae332SPoul-Henning Kamp g_access(struct g_consumer *cp, int dcr, int dcw, int dce)
866dd84a43cSPoul-Henning Kamp {
867dd84a43cSPoul-Henning Kamp 	struct g_provider *pp;
868dd84a43cSPoul-Henning Kamp 	int pr,pw,pe;
869dd84a43cSPoul-Henning Kamp 	int error;
870dd84a43cSPoul-Henning Kamp 
8713d1d5bc3SPoul-Henning Kamp 	g_topology_assert();
8723d1d5bc3SPoul-Henning Kamp 	G_VALID_CONSUMER(cp);
873dd84a43cSPoul-Henning Kamp 	pp = cp->provider;
874950124e3SPawel Jakub Dawidek 	KASSERT(pp != NULL, ("access but not attached"));
8753d1d5bc3SPoul-Henning Kamp 	G_VALID_PROVIDER(pp);
876dd84a43cSPoul-Henning Kamp 
877d2bae332SPoul-Henning Kamp 	g_trace(G_T_ACCESS, "g_access(%p(%s), %d, %d, %d)",
878dd84a43cSPoul-Henning Kamp 	    cp, pp->name, dcr, dcw, dce);
879dd84a43cSPoul-Henning Kamp 
880dd84a43cSPoul-Henning Kamp 	KASSERT(cp->acr + dcr >= 0, ("access resulting in negative acr"));
881dd84a43cSPoul-Henning Kamp 	KASSERT(cp->acw + dcw >= 0, ("access resulting in negative acw"));
882dd84a43cSPoul-Henning Kamp 	KASSERT(cp->ace + dce >= 0, ("access resulting in negative ace"));
883cfa35456SPoul-Henning Kamp 	KASSERT(dcr != 0 || dcw != 0 || dce != 0, ("NOP access request"));
88407d77fc6SPoul-Henning Kamp 	KASSERT(pp->geom->access != NULL, ("NULL geom->access"));
885dd84a43cSPoul-Henning Kamp 
886dd84a43cSPoul-Henning Kamp 	/*
887e805e8f0SPoul-Henning Kamp 	 * If our class cares about being spoiled, and we have been, we
888dd84a43cSPoul-Henning Kamp 	 * are probably just ahead of the event telling us that.  Fail
889dd84a43cSPoul-Henning Kamp 	 * now rather than having to unravel this later.
890dd84a43cSPoul-Henning Kamp 	 */
8913631c638SAlexander Motin 	if (cp->geom->spoiled != NULL && (cp->flags & G_CF_SPOILED) &&
8924fa0290fSPoul-Henning Kamp 	    (dcr > 0 || dcw > 0 || dce > 0))
8934fa0290fSPoul-Henning Kamp 		return (ENXIO);
894dd84a43cSPoul-Henning Kamp 
895dd84a43cSPoul-Henning Kamp 	/*
896dd84a43cSPoul-Henning Kamp 	 * Figure out what counts the provider would have had, if this
897dd84a43cSPoul-Henning Kamp 	 * consumer had (r0w0e0) at this time.
898dd84a43cSPoul-Henning Kamp 	 */
899dd84a43cSPoul-Henning Kamp 	pr = pp->acr - cp->acr;
900dd84a43cSPoul-Henning Kamp 	pw = pp->acw - cp->acw;
901dd84a43cSPoul-Henning Kamp 	pe = pp->ace - cp->ace;
902dd84a43cSPoul-Henning Kamp 
903dd84a43cSPoul-Henning Kamp 	g_trace(G_T_ACCESS,
904dd84a43cSPoul-Henning Kamp     "open delta:[r%dw%de%d] old:[r%dw%de%d] provider:[r%dw%de%d] %p(%s)",
905dd84a43cSPoul-Henning Kamp 	    dcr, dcw, dce,
906dd84a43cSPoul-Henning Kamp 	    cp->acr, cp->acw, cp->ace,
907dd84a43cSPoul-Henning Kamp 	    pp->acr, pp->acw, pp->ace,
908dd84a43cSPoul-Henning Kamp 	    pp, pp->name);
909dd84a43cSPoul-Henning Kamp 
9108ebd558fSPoul-Henning Kamp 	/* If foot-shooting is enabled, any open on rank#1 is OK */
9118ebd558fSPoul-Henning Kamp 	if ((g_debugflags & 16) && pp->geom->rank == 1)
9128ebd558fSPoul-Henning Kamp 		;
913dd84a43cSPoul-Henning Kamp 	/* If we try exclusive but already write: fail */
9148ebd558fSPoul-Henning Kamp 	else if (dce > 0 && pw > 0)
915dd84a43cSPoul-Henning Kamp 		return (EPERM);
916dd84a43cSPoul-Henning Kamp 	/* If we try write but already exclusive: fail */
9178ebd558fSPoul-Henning Kamp 	else if (dcw > 0 && pe > 0)
918dd84a43cSPoul-Henning Kamp 		return (EPERM);
919dd84a43cSPoul-Henning Kamp 	/* If we try to open more but provider is error'ed: fail */
9208ebd558fSPoul-Henning Kamp 	else if ((dcr > 0 || dcw > 0 || dce > 0) && pp->error != 0)
921dd84a43cSPoul-Henning Kamp 		return (pp->error);
922dd84a43cSPoul-Henning Kamp 
923dd84a43cSPoul-Henning Kamp 	/* Ok then... */
924dd84a43cSPoul-Henning Kamp 
9258f6da0e4SPoul-Henning Kamp 	error = pp->geom->access(pp, dcr, dcw, dce);
926bfc37a51SPoul-Henning Kamp 	KASSERT(dcr > 0 || dcw > 0 || dce > 0 || error == 0,
927bfc37a51SPoul-Henning Kamp 	    ("Geom provider %s::%s failed closing ->access()",
928bfc37a51SPoul-Henning Kamp 	    pp->geom->class->name, pp->name));
9298f6da0e4SPoul-Henning Kamp 	if (!error) {
930dd84a43cSPoul-Henning Kamp 		/*
931dd84a43cSPoul-Henning Kamp 		 * If we open first write, spoil any partner consumers.
932a7e69e8bSJohn Polstra 		 * If we close last write and provider is not errored,
933a7e69e8bSJohn Polstra 		 * trigger re-taste.
934dd84a43cSPoul-Henning Kamp 		 */
935dd84a43cSPoul-Henning Kamp 		if (pp->acw == 0 && dcw != 0)
936dd84a43cSPoul-Henning Kamp 			g_spoil(pp, cp);
937a7e69e8bSJohn Polstra 		else if (pp->acw != 0 && pp->acw == -dcw && pp->error == 0 &&
938a9ed5e11SPoul-Henning Kamp 		    !(pp->geom->flags & G_GEOM_WITHER))
9398cd1535aSPoul-Henning Kamp 			g_post_event(g_new_provider_event, pp, M_WAITOK,
9408cd1535aSPoul-Henning Kamp 			    pp, NULL);
941dd84a43cSPoul-Henning Kamp 
942dd84a43cSPoul-Henning Kamp 		pp->acr += dcr;
943dd84a43cSPoul-Henning Kamp 		pp->acw += dcw;
944dd84a43cSPoul-Henning Kamp 		pp->ace += dce;
945dd84a43cSPoul-Henning Kamp 		cp->acr += dcr;
946dd84a43cSPoul-Henning Kamp 		cp->acw += dcw;
947dd84a43cSPoul-Henning Kamp 		cp->ace += dce;
9485ae652c0SPoul-Henning Kamp 		if (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)
9495ae652c0SPoul-Henning Kamp 			KASSERT(pp->sectorsize > 0,
9505ae652c0SPoul-Henning Kamp 			    ("Provider %s lacks sectorsize", pp->name));
951dd84a43cSPoul-Henning Kamp 	}
952dd84a43cSPoul-Henning Kamp 	return (error);
953dd84a43cSPoul-Henning Kamp }
954dd84a43cSPoul-Henning Kamp 
955dd84a43cSPoul-Henning Kamp int
9560f9d3dbaSPoul-Henning Kamp g_handleattr_int(struct bio *bp, const char *attribute, int val)
957dd84a43cSPoul-Henning Kamp {
958dd84a43cSPoul-Henning Kamp 
959503abe45SPoul-Henning Kamp 	return (g_handleattr(bp, attribute, &val, sizeof val));
960dd84a43cSPoul-Henning Kamp }
961dd84a43cSPoul-Henning Kamp 
962dd84a43cSPoul-Henning Kamp int
9630f9d3dbaSPoul-Henning Kamp g_handleattr_off_t(struct bio *bp, const char *attribute, off_t val)
964dd84a43cSPoul-Henning Kamp {
965dd84a43cSPoul-Henning Kamp 
966503abe45SPoul-Henning Kamp 	return (g_handleattr(bp, attribute, &val, sizeof val));
967dd84a43cSPoul-Henning Kamp }
968dd84a43cSPoul-Henning Kamp 
969dd84a43cSPoul-Henning Kamp int
970709a6266SMarcel Moolenaar g_handleattr_str(struct bio *bp, const char *attribute, const char *str)
971d19dbf4aSPawel Jakub Dawidek {
972d19dbf4aSPawel Jakub Dawidek 
973d19dbf4aSPawel Jakub Dawidek 	return (g_handleattr(bp, attribute, str, 0));
974d19dbf4aSPawel Jakub Dawidek }
975d19dbf4aSPawel Jakub Dawidek 
976d19dbf4aSPawel Jakub Dawidek int
977709a6266SMarcel Moolenaar g_handleattr(struct bio *bp, const char *attribute, const void *val, int len)
978dd84a43cSPoul-Henning Kamp {
979d19dbf4aSPawel Jakub Dawidek 	int error = 0;
980dd84a43cSPoul-Henning Kamp 
981dd84a43cSPoul-Henning Kamp 	if (strcmp(bp->bio_attribute, attribute))
982dd84a43cSPoul-Henning Kamp 		return (0);
983d19dbf4aSPawel Jakub Dawidek 	if (len == 0) {
984d19dbf4aSPawel Jakub Dawidek 		bzero(bp->bio_data, bp->bio_length);
985d19dbf4aSPawel Jakub Dawidek 		if (strlcpy(bp->bio_data, val, bp->bio_length) >=
986d19dbf4aSPawel Jakub Dawidek 		    bp->bio_length) {
987d19dbf4aSPawel Jakub Dawidek 			printf("%s: %s bio_length %jd len %zu -> EFAULT\n",
988d19dbf4aSPawel Jakub Dawidek 			    __func__, bp->bio_to->name,
989d19dbf4aSPawel Jakub Dawidek 			    (intmax_t)bp->bio_length, strlen(val));
990dd84a43cSPoul-Henning Kamp 			error = EFAULT;
991d19dbf4aSPawel Jakub Dawidek 		}
992d19dbf4aSPawel Jakub Dawidek 	} else if (bp->bio_length == len) {
993dd84a43cSPoul-Henning Kamp 		bcopy(val, bp->bio_data, len);
994d19dbf4aSPawel Jakub Dawidek 	} else {
995d19dbf4aSPawel Jakub Dawidek 		printf("%s: %s bio_length %jd len %d -> EFAULT\n", __func__,
996d19dbf4aSPawel Jakub Dawidek 		    bp->bio_to->name, (intmax_t)bp->bio_length, len);
997d19dbf4aSPawel Jakub Dawidek 		error = EFAULT;
998dd84a43cSPoul-Henning Kamp 	}
999da3ee909SMarcel Moolenaar 	if (error == 0)
1000da3ee909SMarcel Moolenaar 		bp->bio_completed = bp->bio_length;
100172840432SPoul-Henning Kamp 	g_io_deliver(bp, error);
1002dd84a43cSPoul-Henning Kamp 	return (1);
1003dd84a43cSPoul-Henning Kamp }
1004dd84a43cSPoul-Henning Kamp 
1005dd84a43cSPoul-Henning Kamp int
10063d1d5bc3SPoul-Henning Kamp g_std_access(struct g_provider *pp,
1007dd84a43cSPoul-Henning Kamp 	int dr __unused, int dw __unused, int de __unused)
1008dd84a43cSPoul-Henning Kamp {
1009dd84a43cSPoul-Henning Kamp 
10103d1d5bc3SPoul-Henning Kamp 	g_topology_assert();
10113d1d5bc3SPoul-Henning Kamp 	G_VALID_PROVIDER(pp);
1012dd84a43cSPoul-Henning Kamp         return (0);
1013dd84a43cSPoul-Henning Kamp }
1014dd84a43cSPoul-Henning Kamp 
1015dd84a43cSPoul-Henning Kamp void
1016dd84a43cSPoul-Henning Kamp g_std_done(struct bio *bp)
1017dd84a43cSPoul-Henning Kamp {
1018dd84a43cSPoul-Henning Kamp 	struct bio *bp2;
1019dd84a43cSPoul-Henning Kamp 
1020936cc461SPoul-Henning Kamp 	bp2 = bp->bio_parent;
10213f521b60SPoul-Henning Kamp 	if (bp2->bio_error == 0)
10223f521b60SPoul-Henning Kamp 		bp2->bio_error = bp->bio_error;
10233f521b60SPoul-Henning Kamp 	bp2->bio_completed += bp->bio_completed;
1024dd84a43cSPoul-Henning Kamp 	g_destroy_bio(bp);
1025801bb689SPoul-Henning Kamp 	bp2->bio_inbed++;
1026801bb689SPoul-Henning Kamp 	if (bp2->bio_children == bp2->bio_inbed)
10273f521b60SPoul-Henning Kamp 		g_io_deliver(bp2, bp2->bio_error);
1028dd84a43cSPoul-Henning Kamp }
1029dd84a43cSPoul-Henning Kamp 
1030dd84a43cSPoul-Henning Kamp /* XXX: maybe this is only g_slice_spoiled */
1031dd84a43cSPoul-Henning Kamp 
1032dd84a43cSPoul-Henning Kamp void
1033dd84a43cSPoul-Henning Kamp g_std_spoiled(struct g_consumer *cp)
1034dd84a43cSPoul-Henning Kamp {
1035c4da4e46SPoul-Henning Kamp 	struct g_geom *gp;
1036c4da4e46SPoul-Henning Kamp 	struct g_provider *pp;
1037dd84a43cSPoul-Henning Kamp 
1038dd84a43cSPoul-Henning Kamp 	g_topology_assert();
10393d1d5bc3SPoul-Henning Kamp 	G_VALID_CONSUMER(cp);
10403d1d5bc3SPoul-Henning Kamp 	g_trace(G_T_TOPOLOGY, "g_std_spoiled(%p)", cp);
10413631c638SAlexander Motin 	cp->flags |= G_CF_ORPHAN;
1042c4da4e46SPoul-Henning Kamp 	g_detach(cp);
1043c4da4e46SPoul-Henning Kamp 	gp = cp->geom;
1044c4da4e46SPoul-Henning Kamp 	LIST_FOREACH(pp, &gp->provider, provider)
1045c4da4e46SPoul-Henning Kamp 		g_orphan_provider(pp, ENXIO);
1046c4da4e46SPoul-Henning Kamp 	g_destroy_consumer(cp);
1047c4da4e46SPoul-Henning Kamp 	if (LIST_EMPTY(&gp->provider) && LIST_EMPTY(&gp->consumer))
1048c4da4e46SPoul-Henning Kamp 		g_destroy_geom(gp);
1049c4da4e46SPoul-Henning Kamp 	else
1050c4da4e46SPoul-Henning Kamp 		gp->flags |= G_GEOM_WITHER;
1051dd84a43cSPoul-Henning Kamp }
1052dd84a43cSPoul-Henning Kamp 
1053dd84a43cSPoul-Henning Kamp /*
1054dd84a43cSPoul-Henning Kamp  * Spoiling happens when a provider is opened for writing, but consumers
1055dd84a43cSPoul-Henning Kamp  * which are configured by in-band data are attached (slicers for instance).
1056dd84a43cSPoul-Henning Kamp  * Since the write might potentially change the in-band data, such consumers
1057dd84a43cSPoul-Henning Kamp  * need to re-evaluate their existence after the writing session closes.
1058dd84a43cSPoul-Henning Kamp  * We do this by (offering to) tear them down when the open for write happens
1059dd84a43cSPoul-Henning Kamp  * in return for a re-taste when it closes again.
1060dd84a43cSPoul-Henning Kamp  * Together with the fact that such consumers grab an 'e' bit whenever they
1061dd84a43cSPoul-Henning Kamp  * are open, regardless of mode, this ends up DTRT.
1062dd84a43cSPoul-Henning Kamp  */
1063dd84a43cSPoul-Henning Kamp 
1064f2e9a094SPoul-Henning Kamp static void
1065f2e9a094SPoul-Henning Kamp g_spoil_event(void *arg, int flag)
1066f2e9a094SPoul-Henning Kamp {
1067f2e9a094SPoul-Henning Kamp 	struct g_provider *pp;
1068f2e9a094SPoul-Henning Kamp 	struct g_consumer *cp, *cp2;
1069f2e9a094SPoul-Henning Kamp 
1070f2e9a094SPoul-Henning Kamp 	g_topology_assert();
1071f2e9a094SPoul-Henning Kamp 	if (flag == EV_CANCEL)
1072f2e9a094SPoul-Henning Kamp 		return;
1073f2e9a094SPoul-Henning Kamp 	pp = arg;
10743d1d5bc3SPoul-Henning Kamp 	G_VALID_PROVIDER(pp);
1075f2e9a094SPoul-Henning Kamp 	for (cp = LIST_FIRST(&pp->consumers); cp != NULL; cp = cp2) {
1076f2e9a094SPoul-Henning Kamp 		cp2 = LIST_NEXT(cp, consumers);
10773631c638SAlexander Motin 		if ((cp->flags & G_CF_SPOILED) == 0)
1078f2e9a094SPoul-Henning Kamp 			continue;
10793631c638SAlexander Motin 		cp->flags &= ~G_CF_SPOILED;
1080f2e9a094SPoul-Henning Kamp 		if (cp->geom->spoiled == NULL)
1081f2e9a094SPoul-Henning Kamp 			continue;
1082f2e9a094SPoul-Henning Kamp 		cp->geom->spoiled(cp);
1083f2e9a094SPoul-Henning Kamp 		g_topology_assert();
1084f2e9a094SPoul-Henning Kamp 	}
1085f2e9a094SPoul-Henning Kamp }
1086f2e9a094SPoul-Henning Kamp 
1087dd84a43cSPoul-Henning Kamp void
1088dd84a43cSPoul-Henning Kamp g_spoil(struct g_provider *pp, struct g_consumer *cp)
1089dd84a43cSPoul-Henning Kamp {
1090dd84a43cSPoul-Henning Kamp 	struct g_consumer *cp2;
1091dd84a43cSPoul-Henning Kamp 
1092dd84a43cSPoul-Henning Kamp 	g_topology_assert();
10933d1d5bc3SPoul-Henning Kamp 	G_VALID_PROVIDER(pp);
10943d1d5bc3SPoul-Henning Kamp 	G_VALID_CONSUMER(cp);
1095dd84a43cSPoul-Henning Kamp 
1096dd84a43cSPoul-Henning Kamp 	LIST_FOREACH(cp2, &pp->consumers, consumers) {
1097dd84a43cSPoul-Henning Kamp 		if (cp2 == cp)
1098dd84a43cSPoul-Henning Kamp 			continue;
1099dd84a43cSPoul-Henning Kamp /*
1100dd84a43cSPoul-Henning Kamp 		KASSERT(cp2->acr == 0, ("spoiling cp->acr = %d", cp2->acr));
1101dd84a43cSPoul-Henning Kamp 		KASSERT(cp2->acw == 0, ("spoiling cp->acw = %d", cp2->acw));
1102dd84a43cSPoul-Henning Kamp */
1103dd84a43cSPoul-Henning Kamp 		KASSERT(cp2->ace == 0, ("spoiling cp->ace = %d", cp2->ace));
11043631c638SAlexander Motin 		cp2->flags |= G_CF_SPOILED;
1105dd84a43cSPoul-Henning Kamp 	}
11068cd1535aSPoul-Henning Kamp 	g_post_event(g_spoil_event, pp, M_WAITOK, pp, NULL);
1107dd84a43cSPoul-Henning Kamp }
1108dd84a43cSPoul-Henning Kamp 
11093631c638SAlexander Motin static void
11103631c638SAlexander Motin g_media_changed_event(void *arg, int flag)
11113631c638SAlexander Motin {
11123631c638SAlexander Motin 	struct g_provider *pp;
11133631c638SAlexander Motin 	int retaste;
11143631c638SAlexander Motin 
11153631c638SAlexander Motin 	g_topology_assert();
11163631c638SAlexander Motin 	if (flag == EV_CANCEL)
11173631c638SAlexander Motin 		return;
11183631c638SAlexander Motin 	pp = arg;
11193631c638SAlexander Motin 	G_VALID_PROVIDER(pp);
11203631c638SAlexander Motin 
11213631c638SAlexander Motin 	/*
11223631c638SAlexander Motin 	 * If provider was not open for writing, queue retaste after spoiling.
11233631c638SAlexander Motin 	 * If it was, retaste will happen automatically on close.
11243631c638SAlexander Motin 	 */
11253631c638SAlexander Motin 	retaste = (pp->acw == 0 && pp->error == 0 &&
11263631c638SAlexander Motin 	    !(pp->geom->flags & G_GEOM_WITHER));
11273631c638SAlexander Motin 	g_spoil_event(arg, flag);
11283631c638SAlexander Motin 	if (retaste)
11293631c638SAlexander Motin 		g_post_event(g_new_provider_event, pp, M_WAITOK, pp, NULL);
11303631c638SAlexander Motin }
11313631c638SAlexander Motin 
11323631c638SAlexander Motin int
11333631c638SAlexander Motin g_media_changed(struct g_provider *pp, int flag)
11343631c638SAlexander Motin {
11353631c638SAlexander Motin 	struct g_consumer *cp;
11363631c638SAlexander Motin 
11373631c638SAlexander Motin 	LIST_FOREACH(cp, &pp->consumers, consumers)
11383631c638SAlexander Motin 		cp->flags |= G_CF_SPOILED;
11393631c638SAlexander Motin 	return (g_post_event(g_media_changed_event, pp, flag, pp, NULL));
11403631c638SAlexander Motin }
11413631c638SAlexander Motin 
11423631c638SAlexander Motin int
11433631c638SAlexander Motin g_media_gone(struct g_provider *pp, int flag)
11443631c638SAlexander Motin {
11453631c638SAlexander Motin 	struct g_consumer *cp;
11463631c638SAlexander Motin 
11473631c638SAlexander Motin 	LIST_FOREACH(cp, &pp->consumers, consumers)
11483631c638SAlexander Motin 		cp->flags |= G_CF_SPOILED;
11493631c638SAlexander Motin 	return (g_post_event(g_spoil_event, pp, flag, pp, NULL));
11503631c638SAlexander Motin }
11513631c638SAlexander Motin 
1152a4ef1c5fSPoul-Henning Kamp int
1153a4ef1c5fSPoul-Henning Kamp g_getattr__(const char *attr, struct g_consumer *cp, void *var, int len)
1154a4ef1c5fSPoul-Henning Kamp {
1155a4ef1c5fSPoul-Henning Kamp 	int error, i;
1156a4ef1c5fSPoul-Henning Kamp 
1157a4ef1c5fSPoul-Henning Kamp 	i = len;
1158a4ef1c5fSPoul-Henning Kamp 	error = g_io_getattr(attr, cp, &i, var);
1159a4ef1c5fSPoul-Henning Kamp 	if (error)
1160a4ef1c5fSPoul-Henning Kamp 		return (error);
1161a4ef1c5fSPoul-Henning Kamp 	if (i != len)
1162a4ef1c5fSPoul-Henning Kamp 		return (EINVAL);
1163a4ef1c5fSPoul-Henning Kamp 	return (0);
1164a4ef1c5fSPoul-Henning Kamp }
11657d590cc4SPoul-Henning Kamp 
116690f2be24SAlexander Motin static int
116790f2be24SAlexander Motin g_get_device_prefix_len(const char *name)
116890f2be24SAlexander Motin {
116990f2be24SAlexander Motin 	int len;
117090f2be24SAlexander Motin 
117190f2be24SAlexander Motin 	if (strncmp(name, "ada", 3) == 0)
117290f2be24SAlexander Motin 		len = 3;
117390f2be24SAlexander Motin 	else if (strncmp(name, "ad", 2) == 0)
117490f2be24SAlexander Motin 		len = 2;
117590f2be24SAlexander Motin 	else
117690f2be24SAlexander Motin 		return (0);
117790f2be24SAlexander Motin 	if (name[len] < '0' || name[len] > '9')
117890f2be24SAlexander Motin 		return (0);
117990f2be24SAlexander Motin 	do {
118090f2be24SAlexander Motin 		len++;
118190f2be24SAlexander Motin 	} while (name[len] >= '0' && name[len] <= '9');
118290f2be24SAlexander Motin 	return (len);
118390f2be24SAlexander Motin }
118490f2be24SAlexander Motin 
118590f2be24SAlexander Motin int
118690f2be24SAlexander Motin g_compare_names(const char *namea, const char *nameb)
118790f2be24SAlexander Motin {
118890f2be24SAlexander Motin 	int deva, devb;
118990f2be24SAlexander Motin 
119090f2be24SAlexander Motin 	if (strcmp(namea, nameb) == 0)
119190f2be24SAlexander Motin 		return (1);
119290f2be24SAlexander Motin 	deva = g_get_device_prefix_len(namea);
119390f2be24SAlexander Motin 	if (deva == 0)
119490f2be24SAlexander Motin 		return (0);
119590f2be24SAlexander Motin 	devb = g_get_device_prefix_len(nameb);
119690f2be24SAlexander Motin 	if (devb == 0)
119790f2be24SAlexander Motin 		return (0);
119890f2be24SAlexander Motin 	if (strcmp(namea + deva, nameb + devb) == 0)
119990f2be24SAlexander Motin 		return (1);
120090f2be24SAlexander Motin 	return (0);
120190f2be24SAlexander Motin }
120290f2be24SAlexander Motin 
1203679f8b7eSPawel Jakub Dawidek #if defined(DIAGNOSTIC) || defined(DDB)
12047d590cc4SPoul-Henning Kamp /*
1205002d1d1cSJaakko Heinonen  * This function walks the mesh and returns a non-zero integer if it
1206002d1d1cSJaakko Heinonen  * finds the argument pointer is an object. The return value indicates
1207002d1d1cSJaakko Heinonen  * which type of object it is believed to be. If topology is not locked,
1208002d1d1cSJaakko Heinonen  * this function is potentially dangerous, but we don't assert that the
1209002d1d1cSJaakko Heinonen  * topology lock is held when called from debugger.
1210b3ecca4dSPoul-Henning Kamp  */
12113d1d5bc3SPoul-Henning Kamp int
1212b3ecca4dSPoul-Henning Kamp g_valid_obj(void const *ptr)
1213b3ecca4dSPoul-Henning Kamp {
1214b3ecca4dSPoul-Henning Kamp 	struct g_class *mp;
1215b3ecca4dSPoul-Henning Kamp 	struct g_geom *gp;
1216b3ecca4dSPoul-Henning Kamp 	struct g_consumer *cp;
1217b3ecca4dSPoul-Henning Kamp 	struct g_provider *pp;
1218b3ecca4dSPoul-Henning Kamp 
1219002d1d1cSJaakko Heinonen #ifdef KDB
1220002d1d1cSJaakko Heinonen 	if (kdb_active == 0)
1221002d1d1cSJaakko Heinonen #endif
12228edfe76aSEdward Tomasz Napierala 		g_topology_assert();
12238edfe76aSEdward Tomasz Napierala 
1224b3ecca4dSPoul-Henning Kamp 	LIST_FOREACH(mp, &g_classes, class) {
1225b3ecca4dSPoul-Henning Kamp 		if (ptr == mp)
1226b3ecca4dSPoul-Henning Kamp 			return (1);
1227b3ecca4dSPoul-Henning Kamp 		LIST_FOREACH(gp, &mp->geom, geom) {
1228b3ecca4dSPoul-Henning Kamp 			if (ptr == gp)
12293d1d5bc3SPoul-Henning Kamp 				return (2);
1230b3ecca4dSPoul-Henning Kamp 			LIST_FOREACH(cp, &gp->consumer, consumer)
1231b3ecca4dSPoul-Henning Kamp 				if (ptr == cp)
12323d1d5bc3SPoul-Henning Kamp 					return (3);
1233b3ecca4dSPoul-Henning Kamp 			LIST_FOREACH(pp, &gp->provider, provider)
1234b3ecca4dSPoul-Henning Kamp 				if (ptr == pp)
12353d1d5bc3SPoul-Henning Kamp 					return (4);
1236b3ecca4dSPoul-Henning Kamp 		}
1237b3ecca4dSPoul-Henning Kamp 	}
1238b3ecca4dSPoul-Henning Kamp 	return(0);
1239b3ecca4dSPoul-Henning Kamp }
12403d1d5bc3SPoul-Henning Kamp #endif
1241679f8b7eSPawel Jakub Dawidek 
1242679f8b7eSPawel Jakub Dawidek #ifdef DDB
1243679f8b7eSPawel Jakub Dawidek 
1244679f8b7eSPawel Jakub Dawidek #define	gprintf(...)	do {						\
12456d66da20SUlf Lilleengen 	db_printf("%*s", indent, "");					\
12466d66da20SUlf Lilleengen 	db_printf(__VA_ARGS__);						\
1247679f8b7eSPawel Jakub Dawidek } while (0)
1248679f8b7eSPawel Jakub Dawidek #define	gprintln(...)	do {						\
1249679f8b7eSPawel Jakub Dawidek 	gprintf(__VA_ARGS__);						\
12506d66da20SUlf Lilleengen 	db_printf("\n");						\
1251679f8b7eSPawel Jakub Dawidek } while (0)
1252679f8b7eSPawel Jakub Dawidek 
1253679f8b7eSPawel Jakub Dawidek #define	ADDFLAG(obj, flag, sflag)	do {				\
1254679f8b7eSPawel Jakub Dawidek 	if ((obj)->flags & (flag)) {					\
1255679f8b7eSPawel Jakub Dawidek 		if (comma)						\
1256679f8b7eSPawel Jakub Dawidek 			strlcat(str, ",", size);			\
1257679f8b7eSPawel Jakub Dawidek 		strlcat(str, (sflag), size);				\
1258679f8b7eSPawel Jakub Dawidek 		comma = 1;						\
1259679f8b7eSPawel Jakub Dawidek 	}								\
1260679f8b7eSPawel Jakub Dawidek } while (0)
1261679f8b7eSPawel Jakub Dawidek 
1262679f8b7eSPawel Jakub Dawidek static char *
1263679f8b7eSPawel Jakub Dawidek provider_flags_to_string(struct g_provider *pp, char *str, size_t size)
1264679f8b7eSPawel Jakub Dawidek {
1265679f8b7eSPawel Jakub Dawidek 	int comma = 0;
1266679f8b7eSPawel Jakub Dawidek 
1267679f8b7eSPawel Jakub Dawidek 	bzero(str, size);
1268679f8b7eSPawel Jakub Dawidek 	if (pp->flags == 0) {
1269679f8b7eSPawel Jakub Dawidek 		strlcpy(str, "NONE", size);
1270679f8b7eSPawel Jakub Dawidek 		return (str);
1271679f8b7eSPawel Jakub Dawidek 	}
1272679f8b7eSPawel Jakub Dawidek 	ADDFLAG(pp, G_PF_WITHER, "G_PF_WITHER");
1273679f8b7eSPawel Jakub Dawidek 	ADDFLAG(pp, G_PF_ORPHAN, "G_PF_ORPHAN");
1274679f8b7eSPawel Jakub Dawidek 	return (str);
1275679f8b7eSPawel Jakub Dawidek }
1276679f8b7eSPawel Jakub Dawidek 
1277679f8b7eSPawel Jakub Dawidek static char *
1278679f8b7eSPawel Jakub Dawidek geom_flags_to_string(struct g_geom *gp, char *str, size_t size)
1279679f8b7eSPawel Jakub Dawidek {
1280679f8b7eSPawel Jakub Dawidek 	int comma = 0;
1281679f8b7eSPawel Jakub Dawidek 
1282679f8b7eSPawel Jakub Dawidek 	bzero(str, size);
1283679f8b7eSPawel Jakub Dawidek 	if (gp->flags == 0) {
1284679f8b7eSPawel Jakub Dawidek 		strlcpy(str, "NONE", size);
1285679f8b7eSPawel Jakub Dawidek 		return (str);
1286679f8b7eSPawel Jakub Dawidek 	}
1287679f8b7eSPawel Jakub Dawidek 	ADDFLAG(gp, G_GEOM_WITHER, "G_GEOM_WITHER");
1288679f8b7eSPawel Jakub Dawidek 	return (str);
1289679f8b7eSPawel Jakub Dawidek }
1290679f8b7eSPawel Jakub Dawidek static void
1291679f8b7eSPawel Jakub Dawidek db_show_geom_consumer(int indent, struct g_consumer *cp)
1292679f8b7eSPawel Jakub Dawidek {
1293679f8b7eSPawel Jakub Dawidek 
1294679f8b7eSPawel Jakub Dawidek 	if (indent == 0) {
1295679f8b7eSPawel Jakub Dawidek 		gprintln("consumer: %p", cp);
1296679f8b7eSPawel Jakub Dawidek 		gprintln("  class:    %s (%p)", cp->geom->class->name,
1297679f8b7eSPawel Jakub Dawidek 		    cp->geom->class);
1298679f8b7eSPawel Jakub Dawidek 		gprintln("  geom:     %s (%p)", cp->geom->name, cp->geom);
1299679f8b7eSPawel Jakub Dawidek 		if (cp->provider == NULL)
1300679f8b7eSPawel Jakub Dawidek 			gprintln("  provider: none");
1301679f8b7eSPawel Jakub Dawidek 		else {
1302679f8b7eSPawel Jakub Dawidek 			gprintln("  provider: %s (%p)", cp->provider->name,
1303679f8b7eSPawel Jakub Dawidek 			    cp->provider);
1304679f8b7eSPawel Jakub Dawidek 		}
1305679f8b7eSPawel Jakub Dawidek 		gprintln("  access:   r%dw%de%d", cp->acr, cp->acw, cp->ace);
13063631c638SAlexander Motin 		gprintln("  flags:    0x%04x", cp->flags);
1307679f8b7eSPawel Jakub Dawidek 		gprintln("  nstart:   %u", cp->nstart);
1308679f8b7eSPawel Jakub Dawidek 		gprintln("  nend:     %u", cp->nend);
1309679f8b7eSPawel Jakub Dawidek 	} else {
1310679f8b7eSPawel Jakub Dawidek 		gprintf("consumer: %p (%s), access=r%dw%de%d", cp,
1311679f8b7eSPawel Jakub Dawidek 		    cp->provider != NULL ? cp->provider->name : "none",
1312679f8b7eSPawel Jakub Dawidek 		    cp->acr, cp->acw, cp->ace);
13133631c638SAlexander Motin 		if (cp->flags)
13143631c638SAlexander Motin 			db_printf(", flags=0x%04x", cp->flags);
13156d66da20SUlf Lilleengen 		db_printf("\n");
1316679f8b7eSPawel Jakub Dawidek 	}
1317679f8b7eSPawel Jakub Dawidek }
1318679f8b7eSPawel Jakub Dawidek 
1319679f8b7eSPawel Jakub Dawidek static void
1320679f8b7eSPawel Jakub Dawidek db_show_geom_provider(int indent, struct g_provider *pp)
1321679f8b7eSPawel Jakub Dawidek {
1322679f8b7eSPawel Jakub Dawidek 	struct g_consumer *cp;
1323679f8b7eSPawel Jakub Dawidek 	char flags[64];
1324679f8b7eSPawel Jakub Dawidek 
1325679f8b7eSPawel Jakub Dawidek 	if (indent == 0) {
1326679f8b7eSPawel Jakub Dawidek 		gprintln("provider: %s (%p)", pp->name, pp);
1327679f8b7eSPawel Jakub Dawidek 		gprintln("  class:        %s (%p)", pp->geom->class->name,
1328679f8b7eSPawel Jakub Dawidek 		    pp->geom->class);
1329679f8b7eSPawel Jakub Dawidek 		gprintln("  geom:         %s (%p)", pp->geom->name, pp->geom);
1330679f8b7eSPawel Jakub Dawidek 		gprintln("  mediasize:    %jd", (intmax_t)pp->mediasize);
1331679f8b7eSPawel Jakub Dawidek 		gprintln("  sectorsize:   %u", pp->sectorsize);
1332679f8b7eSPawel Jakub Dawidek 		gprintln("  stripesize:   %u", pp->stripesize);
1333679f8b7eSPawel Jakub Dawidek 		gprintln("  stripeoffset: %u", pp->stripeoffset);
1334679f8b7eSPawel Jakub Dawidek 		gprintln("  access:       r%dw%de%d", pp->acr, pp->acw,
1335679f8b7eSPawel Jakub Dawidek 		    pp->ace);
1336679f8b7eSPawel Jakub Dawidek 		gprintln("  flags:        %s (0x%04x)",
1337679f8b7eSPawel Jakub Dawidek 		    provider_flags_to_string(pp, flags, sizeof(flags)),
1338679f8b7eSPawel Jakub Dawidek 		    pp->flags);
1339679f8b7eSPawel Jakub Dawidek 		gprintln("  error:        %d", pp->error);
1340679f8b7eSPawel Jakub Dawidek 		gprintln("  nstart:       %u", pp->nstart);
1341679f8b7eSPawel Jakub Dawidek 		gprintln("  nend:         %u", pp->nend);
1342679f8b7eSPawel Jakub Dawidek 		if (LIST_EMPTY(&pp->consumers))
1343679f8b7eSPawel Jakub Dawidek 			gprintln("  consumers:    none");
1344679f8b7eSPawel Jakub Dawidek 	} else {
1345679f8b7eSPawel Jakub Dawidek 		gprintf("provider: %s (%p), access=r%dw%de%d",
1346679f8b7eSPawel Jakub Dawidek 		    pp->name, pp, pp->acr, pp->acw, pp->ace);
1347679f8b7eSPawel Jakub Dawidek 		if (pp->flags != 0) {
13486d66da20SUlf Lilleengen 			db_printf(", flags=%s (0x%04x)",
1349679f8b7eSPawel Jakub Dawidek 			    provider_flags_to_string(pp, flags, sizeof(flags)),
1350679f8b7eSPawel Jakub Dawidek 			    pp->flags);
1351679f8b7eSPawel Jakub Dawidek 		}
13526d66da20SUlf Lilleengen 		db_printf("\n");
1353679f8b7eSPawel Jakub Dawidek 	}
1354679f8b7eSPawel Jakub Dawidek 	if (!LIST_EMPTY(&pp->consumers)) {
1355f02642d7SPawel Jakub Dawidek 		LIST_FOREACH(cp, &pp->consumers, consumers) {
1356679f8b7eSPawel Jakub Dawidek 			db_show_geom_consumer(indent + 2, cp);
1357f02642d7SPawel Jakub Dawidek 			if (db_pager_quit)
1358f02642d7SPawel Jakub Dawidek 				break;
1359f02642d7SPawel Jakub Dawidek 		}
1360679f8b7eSPawel Jakub Dawidek 	}
1361679f8b7eSPawel Jakub Dawidek }
1362679f8b7eSPawel Jakub Dawidek 
1363679f8b7eSPawel Jakub Dawidek static void
1364679f8b7eSPawel Jakub Dawidek db_show_geom_geom(int indent, struct g_geom *gp)
1365679f8b7eSPawel Jakub Dawidek {
1366679f8b7eSPawel Jakub Dawidek 	struct g_provider *pp;
1367679f8b7eSPawel Jakub Dawidek 	struct g_consumer *cp;
1368679f8b7eSPawel Jakub Dawidek 	char flags[64];
1369679f8b7eSPawel Jakub Dawidek 
1370679f8b7eSPawel Jakub Dawidek 	if (indent == 0) {
1371679f8b7eSPawel Jakub Dawidek 		gprintln("geom: %s (%p)", gp->name, gp);
1372679f8b7eSPawel Jakub Dawidek 		gprintln("  class:     %s (%p)", gp->class->name, gp->class);
1373679f8b7eSPawel Jakub Dawidek 		gprintln("  flags:     %s (0x%04x)",
1374679f8b7eSPawel Jakub Dawidek 		    geom_flags_to_string(gp, flags, sizeof(flags)), gp->flags);
1375679f8b7eSPawel Jakub Dawidek 		gprintln("  rank:      %d", gp->rank);
1376679f8b7eSPawel Jakub Dawidek 		if (LIST_EMPTY(&gp->provider))
1377679f8b7eSPawel Jakub Dawidek 			gprintln("  providers: none");
1378679f8b7eSPawel Jakub Dawidek 		if (LIST_EMPTY(&gp->consumer))
1379679f8b7eSPawel Jakub Dawidek 			gprintln("  consumers: none");
1380679f8b7eSPawel Jakub Dawidek 	} else {
1381679f8b7eSPawel Jakub Dawidek 		gprintf("geom: %s (%p), rank=%d", gp->name, gp, gp->rank);
1382679f8b7eSPawel Jakub Dawidek 		if (gp->flags != 0) {
13836d66da20SUlf Lilleengen 			db_printf(", flags=%s (0x%04x)",
1384679f8b7eSPawel Jakub Dawidek 			    geom_flags_to_string(gp, flags, sizeof(flags)),
1385679f8b7eSPawel Jakub Dawidek 			    gp->flags);
1386679f8b7eSPawel Jakub Dawidek 		}
13876d66da20SUlf Lilleengen 		db_printf("\n");
1388679f8b7eSPawel Jakub Dawidek 	}
1389679f8b7eSPawel Jakub Dawidek 	if (!LIST_EMPTY(&gp->provider)) {
1390f02642d7SPawel Jakub Dawidek 		LIST_FOREACH(pp, &gp->provider, provider) {
1391679f8b7eSPawel Jakub Dawidek 			db_show_geom_provider(indent + 2, pp);
1392f02642d7SPawel Jakub Dawidek 			if (db_pager_quit)
1393f02642d7SPawel Jakub Dawidek 				break;
1394f02642d7SPawel Jakub Dawidek 		}
1395679f8b7eSPawel Jakub Dawidek 	}
1396679f8b7eSPawel Jakub Dawidek 	if (!LIST_EMPTY(&gp->consumer)) {
1397f02642d7SPawel Jakub Dawidek 		LIST_FOREACH(cp, &gp->consumer, consumer) {
1398679f8b7eSPawel Jakub Dawidek 			db_show_geom_consumer(indent + 2, cp);
1399f02642d7SPawel Jakub Dawidek 			if (db_pager_quit)
1400f02642d7SPawel Jakub Dawidek 				break;
1401f02642d7SPawel Jakub Dawidek 		}
1402679f8b7eSPawel Jakub Dawidek 	}
1403679f8b7eSPawel Jakub Dawidek }
1404679f8b7eSPawel Jakub Dawidek 
1405679f8b7eSPawel Jakub Dawidek static void
1406679f8b7eSPawel Jakub Dawidek db_show_geom_class(struct g_class *mp)
1407679f8b7eSPawel Jakub Dawidek {
1408679f8b7eSPawel Jakub Dawidek 	struct g_geom *gp;
1409679f8b7eSPawel Jakub Dawidek 
14106d66da20SUlf Lilleengen 	db_printf("class: %s (%p)\n", mp->name, mp);
1411f02642d7SPawel Jakub Dawidek 	LIST_FOREACH(gp, &mp->geom, geom) {
1412679f8b7eSPawel Jakub Dawidek 		db_show_geom_geom(2, gp);
1413f02642d7SPawel Jakub Dawidek 		if (db_pager_quit)
1414f02642d7SPawel Jakub Dawidek 			break;
1415f02642d7SPawel Jakub Dawidek 	}
1416679f8b7eSPawel Jakub Dawidek }
1417679f8b7eSPawel Jakub Dawidek 
1418679f8b7eSPawel Jakub Dawidek /*
1419679f8b7eSPawel Jakub Dawidek  * Print the GEOM topology or the given object.
1420679f8b7eSPawel Jakub Dawidek  */
1421679f8b7eSPawel Jakub Dawidek DB_SHOW_COMMAND(geom, db_show_geom)
1422679f8b7eSPawel Jakub Dawidek {
1423679f8b7eSPawel Jakub Dawidek 	struct g_class *mp;
1424679f8b7eSPawel Jakub Dawidek 
1425679f8b7eSPawel Jakub Dawidek 	if (!have_addr) {
1426679f8b7eSPawel Jakub Dawidek 		/* No address given, print the entire topology. */
1427679f8b7eSPawel Jakub Dawidek 		LIST_FOREACH(mp, &g_classes, class) {
1428679f8b7eSPawel Jakub Dawidek 			db_show_geom_class(mp);
14296d66da20SUlf Lilleengen 			db_printf("\n");
1430f02642d7SPawel Jakub Dawidek 			if (db_pager_quit)
1431f02642d7SPawel Jakub Dawidek 				break;
1432679f8b7eSPawel Jakub Dawidek 		}
1433679f8b7eSPawel Jakub Dawidek 	} else {
1434679f8b7eSPawel Jakub Dawidek 		switch (g_valid_obj((void *)addr)) {
1435679f8b7eSPawel Jakub Dawidek 		case 1:
1436679f8b7eSPawel Jakub Dawidek 			db_show_geom_class((struct g_class *)addr);
1437679f8b7eSPawel Jakub Dawidek 			break;
1438679f8b7eSPawel Jakub Dawidek 		case 2:
1439679f8b7eSPawel Jakub Dawidek 			db_show_geom_geom(0, (struct g_geom *)addr);
1440679f8b7eSPawel Jakub Dawidek 			break;
1441679f8b7eSPawel Jakub Dawidek 		case 3:
1442679f8b7eSPawel Jakub Dawidek 			db_show_geom_consumer(0, (struct g_consumer *)addr);
1443679f8b7eSPawel Jakub Dawidek 			break;
1444679f8b7eSPawel Jakub Dawidek 		case 4:
1445679f8b7eSPawel Jakub Dawidek 			db_show_geom_provider(0, (struct g_provider *)addr);
1446679f8b7eSPawel Jakub Dawidek 			break;
1447679f8b7eSPawel Jakub Dawidek 		default:
14486d66da20SUlf Lilleengen 			db_printf("Not a GEOM object.\n");
1449679f8b7eSPawel Jakub Dawidek 			break;
1450679f8b7eSPawel Jakub Dawidek 		}
1451679f8b7eSPawel Jakub Dawidek 	}
1452679f8b7eSPawel Jakub Dawidek }
1453679f8b7eSPawel Jakub Dawidek 
1454bf7d2c17SUlf Lilleengen static void
1455bf7d2c17SUlf Lilleengen db_print_bio_cmd(struct bio *bp)
1456bf7d2c17SUlf Lilleengen {
14576d66da20SUlf Lilleengen 	db_printf("  cmd: ");
1458bf7d2c17SUlf Lilleengen 	switch (bp->bio_cmd) {
14596d66da20SUlf Lilleengen 	case BIO_READ: db_printf("BIO_READ"); break;
14606d66da20SUlf Lilleengen 	case BIO_WRITE: db_printf("BIO_WRITE"); break;
14616d66da20SUlf Lilleengen 	case BIO_DELETE: db_printf("BIO_DELETE"); break;
14626d66da20SUlf Lilleengen 	case BIO_GETATTR: db_printf("BIO_GETATTR"); break;
14636d66da20SUlf Lilleengen 	case BIO_FLUSH: db_printf("BIO_FLUSH"); break;
14646d66da20SUlf Lilleengen 	case BIO_CMD0: db_printf("BIO_CMD0"); break;
14656d66da20SUlf Lilleengen 	case BIO_CMD1: db_printf("BIO_CMD1"); break;
14666d66da20SUlf Lilleengen 	case BIO_CMD2: db_printf("BIO_CMD2"); break;
14676d66da20SUlf Lilleengen 	default: db_printf("UNKNOWN"); break;
1468bf7d2c17SUlf Lilleengen 	}
14696d66da20SUlf Lilleengen 	db_printf("\n");
1470bf7d2c17SUlf Lilleengen }
1471bf7d2c17SUlf Lilleengen 
1472bf7d2c17SUlf Lilleengen static void
1473bf7d2c17SUlf Lilleengen db_print_bio_flags(struct bio *bp)
1474bf7d2c17SUlf Lilleengen {
1475bf7d2c17SUlf Lilleengen 	int comma;
1476bf7d2c17SUlf Lilleengen 
1477bf7d2c17SUlf Lilleengen 	comma = 0;
14786d66da20SUlf Lilleengen 	db_printf("  flags: ");
1479bf7d2c17SUlf Lilleengen 	if (bp->bio_flags & BIO_ERROR) {
14806d66da20SUlf Lilleengen 		db_printf("BIO_ERROR");
1481bf7d2c17SUlf Lilleengen 		comma = 1;
1482bf7d2c17SUlf Lilleengen 	}
1483bf7d2c17SUlf Lilleengen 	if (bp->bio_flags & BIO_DONE) {
14846d66da20SUlf Lilleengen 		db_printf("%sBIO_DONE", (comma ? ", " : ""));
1485bf7d2c17SUlf Lilleengen 		comma = 1;
1486bf7d2c17SUlf Lilleengen 	}
1487bf7d2c17SUlf Lilleengen 	if (bp->bio_flags & BIO_ONQUEUE)
14886d66da20SUlf Lilleengen 		db_printf("%sBIO_ONQUEUE", (comma ? ", " : ""));
14896d66da20SUlf Lilleengen 	db_printf("\n");
1490bf7d2c17SUlf Lilleengen }
1491bf7d2c17SUlf Lilleengen 
1492bf7d2c17SUlf Lilleengen /*
1493bf7d2c17SUlf Lilleengen  * Print useful information in a BIO
1494bf7d2c17SUlf Lilleengen  */
1495bf7d2c17SUlf Lilleengen DB_SHOW_COMMAND(bio, db_show_bio)
1496bf7d2c17SUlf Lilleengen {
1497bf7d2c17SUlf Lilleengen 	struct bio *bp;
1498bf7d2c17SUlf Lilleengen 
1499bf7d2c17SUlf Lilleengen 	if (have_addr) {
1500bf7d2c17SUlf Lilleengen 		bp = (struct bio *)addr;
15016d66da20SUlf Lilleengen 		db_printf("BIO %p\n", bp);
1502bf7d2c17SUlf Lilleengen 		db_print_bio_cmd(bp);
1503bf7d2c17SUlf Lilleengen 		db_print_bio_flags(bp);
15046d66da20SUlf Lilleengen 		db_printf("  cflags: 0x%hhx\n", bp->bio_cflags);
15056d66da20SUlf Lilleengen 		db_printf("  pflags: 0x%hhx\n", bp->bio_pflags);
15064147dd02SUlf Lilleengen 		db_printf("  offset: %jd\n", (intmax_t)bp->bio_offset);
15074147dd02SUlf Lilleengen 		db_printf("  length: %jd\n", (intmax_t)bp->bio_length);
15086d66da20SUlf Lilleengen 		db_printf("  bcount: %ld\n", bp->bio_bcount);
15096d66da20SUlf Lilleengen 		db_printf("  resid: %ld\n", bp->bio_resid);
15104147dd02SUlf Lilleengen 		db_printf("  completed: %jd\n", (intmax_t)bp->bio_completed);
15116d66da20SUlf Lilleengen 		db_printf("  children: %u\n", bp->bio_children);
15126d66da20SUlf Lilleengen 		db_printf("  inbed: %u\n", bp->bio_inbed);
15136d66da20SUlf Lilleengen 		db_printf("  error: %d\n", bp->bio_error);
15146d66da20SUlf Lilleengen 		db_printf("  parent: %p\n", bp->bio_parent);
15156d66da20SUlf Lilleengen 		db_printf("  driver1: %p\n", bp->bio_driver1);
15166d66da20SUlf Lilleengen 		db_printf("  driver2: %p\n", bp->bio_driver2);
15176d66da20SUlf Lilleengen 		db_printf("  caller1: %p\n", bp->bio_caller1);
15186d66da20SUlf Lilleengen 		db_printf("  caller2: %p\n", bp->bio_caller2);
15196d66da20SUlf Lilleengen 		db_printf("  bio_from: %p\n", bp->bio_from);
15206d66da20SUlf Lilleengen 		db_printf("  bio_to: %p\n", bp->bio_to);
1521bf7d2c17SUlf Lilleengen 	}
1522bf7d2c17SUlf Lilleengen }
1523bf7d2c17SUlf Lilleengen 
1524679f8b7eSPawel Jakub Dawidek #undef	gprintf
1525679f8b7eSPawel Jakub Dawidek #undef	gprintln
1526679f8b7eSPawel Jakub Dawidek #undef	ADDFLAG
1527679f8b7eSPawel Jakub Dawidek 
1528679f8b7eSPawel Jakub Dawidek #endif	/* DDB */
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