xref: /freebsd/sys/geom/geom_disk.c (revision 7da1ebfd74cbe823b3cfeb634781e510df6773a5)
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  * $FreeBSD$
36dd84a43cSPoul-Henning Kamp  */
37dd84a43cSPoul-Henning Kamp 
383bd65612SPoul-Henning Kamp #include "opt_geom.h"
393bd65612SPoul-Henning Kamp 
40dd84a43cSPoul-Henning Kamp #include <sys/param.h>
41dd84a43cSPoul-Henning Kamp #include <sys/systm.h>
42dd84a43cSPoul-Henning Kamp #include <sys/kernel.h>
43dd84a43cSPoul-Henning Kamp #include <sys/sysctl.h>
44dd84a43cSPoul-Henning Kamp #include <sys/bio.h>
45dd84a43cSPoul-Henning Kamp #include <sys/conf.h>
46dd84a43cSPoul-Henning Kamp #include <sys/disk.h>
4731a1093fSPoul-Henning Kamp #include <sys/fcntl.h>
48dd84a43cSPoul-Henning Kamp #include <sys/malloc.h>
49dd84a43cSPoul-Henning Kamp #include <sys/sysctl.h>
5060794e04SPoul-Henning Kamp #include <sys/devicestat.h>
51dd84a43cSPoul-Henning Kamp #include <machine/md_var.h>
52dd84a43cSPoul-Henning Kamp 
53dd84a43cSPoul-Henning Kamp #include <sys/lock.h>
54dd84a43cSPoul-Henning Kamp #include <sys/mutex.h>
55dd84a43cSPoul-Henning Kamp #include <geom/geom.h>
567da1ebfdSPoul-Henning Kamp #include <geom/geom_int.h>
57dd84a43cSPoul-Henning Kamp 
5815c672a3SPoul-Henning Kamp static struct mtx g_disk_done_mtx;
5915c672a3SPoul-Henning Kamp 
60dd84a43cSPoul-Henning Kamp static g_access_t g_disk_access;
61dd84a43cSPoul-Henning Kamp 
62e805e8f0SPoul-Henning Kamp struct g_class g_disk_class = {
633abe4a80SPoul-Henning Kamp 	"DISK",
64dd84a43cSPoul-Henning Kamp 	NULL,
65dd84a43cSPoul-Henning Kamp 	NULL,
66503abe45SPoul-Henning Kamp 	G_CLASS_INITIALIZER
67dd84a43cSPoul-Henning Kamp };
68dd84a43cSPoul-Henning Kamp 
6915c672a3SPoul-Henning Kamp static void
7015c672a3SPoul-Henning Kamp g_disk_init(void)
7115c672a3SPoul-Henning Kamp {
7215c672a3SPoul-Henning Kamp 	mtx_unlock(&Giant);
7315c672a3SPoul-Henning Kamp 	g_add_class(&g_disk_class);
7415c672a3SPoul-Henning Kamp 	mtx_init(&g_disk_done_mtx, "g_disk_done", MTX_DEF, 0);
7515c672a3SPoul-Henning Kamp 	mtx_lock(&Giant);
7615c672a3SPoul-Henning Kamp }
7715c672a3SPoul-Henning Kamp 
7815c672a3SPoul-Henning Kamp DECLARE_GEOM_CLASS_INIT(g_disk_class, g_disk, g_disk_init);
798523987bSPoul-Henning Kamp 
805a67919aSPoul-Henning Kamp static void __inline
815a67919aSPoul-Henning Kamp g_disk_lock_giant(struct disk *dp)
825a67919aSPoul-Henning Kamp {
8331a1093fSPoul-Henning Kamp 	if (dp->d_flags & DISKFLAG_NOGIANT)
8431a1093fSPoul-Henning Kamp 		return;
855a67919aSPoul-Henning Kamp 	mtx_lock(&Giant);
865a67919aSPoul-Henning Kamp }
875a67919aSPoul-Henning Kamp 
885a67919aSPoul-Henning Kamp static void __inline
895a67919aSPoul-Henning Kamp g_disk_unlock_giant(struct disk *dp)
905a67919aSPoul-Henning Kamp {
9131a1093fSPoul-Henning Kamp 	if (dp->d_flags & DISKFLAG_NOGIANT)
9231a1093fSPoul-Henning Kamp 		return;
935a67919aSPoul-Henning Kamp 	mtx_unlock(&Giant);
945a67919aSPoul-Henning Kamp }
955a67919aSPoul-Henning Kamp 
96dd84a43cSPoul-Henning Kamp static int
97dd84a43cSPoul-Henning Kamp g_disk_access(struct g_provider *pp, int r, int w, int e)
98dd84a43cSPoul-Henning Kamp {
99dd84a43cSPoul-Henning Kamp 	struct disk *dp;
100dd84a43cSPoul-Henning Kamp 	int error;
101dd84a43cSPoul-Henning Kamp 
102dd84a43cSPoul-Henning Kamp 	g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
103dd84a43cSPoul-Henning Kamp 	    pp->name, r, w, e);
104dd84a43cSPoul-Henning Kamp 	g_topology_assert();
105dd84a43cSPoul-Henning Kamp 	r += pp->acr;
106dd84a43cSPoul-Henning Kamp 	w += pp->acw;
107dd84a43cSPoul-Henning Kamp 	e += pp->ace;
108dd84a43cSPoul-Henning Kamp 	dp = pp->geom->softc;
10931a1093fSPoul-Henning Kamp 	error = 0;
110dd84a43cSPoul-Henning Kamp 	if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
11198bbd7aaSPoul-Henning Kamp 		if (dp->d_open != NULL) {
1125a67919aSPoul-Henning Kamp 			g_disk_lock_giant(dp);
11351dd8980SPoul-Henning Kamp 			error = dp->d_open(dp);
114dd84a43cSPoul-Henning Kamp 			if (error != 0)
11531a1093fSPoul-Henning Kamp 				printf("Opened disk %s -> %d\n",
11631a1093fSPoul-Henning Kamp 				    pp->name, error);
1175a67919aSPoul-Henning Kamp 			g_disk_unlock_giant(dp);
11831a1093fSPoul-Henning Kamp 		}
1193f12caa1SPoul-Henning Kamp 		pp->mediasize = dp->d_mediasize;
1203f12caa1SPoul-Henning Kamp 		pp->sectorsize = dp->d_sectorsize;
12131a1093fSPoul-Henning Kamp 		dp->d_flags |= DISKFLAG_OPEN;
12299af707cSPoul-Henning Kamp 		if (dp->d_maxsize == 0) {
12399af707cSPoul-Henning Kamp 			printf("WARNING: Disk drive %s%d has no d_maxsize\n",
12499af707cSPoul-Henning Kamp 			    dp->d_name, dp->d_unit);
12599af707cSPoul-Henning Kamp 			dp->d_maxsize = DFLTPHYS;
12699af707cSPoul-Henning Kamp 		}
127dd84a43cSPoul-Henning Kamp 	} else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
12898bbd7aaSPoul-Henning Kamp 		if (dp->d_close != NULL) {
1295a67919aSPoul-Henning Kamp 			g_disk_lock_giant(dp);
13051dd8980SPoul-Henning Kamp 			error = dp->d_close(dp);
131dd84a43cSPoul-Henning Kamp 			if (error != 0)
13231a1093fSPoul-Henning Kamp 				printf("Closed disk %s -> %d\n",
13331a1093fSPoul-Henning Kamp 				    pp->name, error);
1345a67919aSPoul-Henning Kamp 			g_disk_unlock_giant(dp);
13531a1093fSPoul-Henning Kamp 		}
13631a1093fSPoul-Henning Kamp 		dp->d_flags &= ~DISKFLAG_OPEN;
137dd84a43cSPoul-Henning Kamp 	}
138dd84a43cSPoul-Henning Kamp 	return (error);
139dd84a43cSPoul-Henning Kamp }
140dd84a43cSPoul-Henning Kamp 
141dd84a43cSPoul-Henning Kamp static void
14295c24b31SPoul-Henning Kamp g_disk_kerneldump(struct bio *bp, struct disk *dp)
14395c24b31SPoul-Henning Kamp {
14495c24b31SPoul-Henning Kamp 	int error;
14595c24b31SPoul-Henning Kamp 	struct g_kerneldump *gkd;
14695c24b31SPoul-Henning Kamp 	struct dumperinfo di;
1478be2bc5cSPoul-Henning Kamp 	struct g_geom *gp;
14895c24b31SPoul-Henning Kamp 
14995c24b31SPoul-Henning Kamp 	gkd = (struct g_kerneldump*)bp->bio_data;
1508be2bc5cSPoul-Henning Kamp 	gp = bp->bio_to->geom;
1518be2bc5cSPoul-Henning Kamp 	g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)",
1528be2bc5cSPoul-Henning Kamp 		gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
15331a1093fSPoul-Henning Kamp 	di.dumper = dp->d_dump;
1542c6b49f6SPoul-Henning Kamp 	di.priv = dp;
1557812d86fSPoul-Henning Kamp 	di.blocksize = dp->d_sectorsize;
15695c24b31SPoul-Henning Kamp 	di.mediaoffset = gkd->offset;
15795c24b31SPoul-Henning Kamp 	di.mediasize = gkd->length;
15895c24b31SPoul-Henning Kamp 	error = set_dumper(&di);
15972840432SPoul-Henning Kamp 	g_io_deliver(bp, error);
16095c24b31SPoul-Henning Kamp }
16195c24b31SPoul-Henning Kamp 
16295c24b31SPoul-Henning Kamp static void
163dd84a43cSPoul-Henning Kamp g_disk_done(struct bio *bp)
164dd84a43cSPoul-Henning Kamp {
16560794e04SPoul-Henning Kamp 	struct bio *bp2;
16660794e04SPoul-Henning Kamp 	struct disk *dp;
167dd84a43cSPoul-Henning Kamp 
16815c672a3SPoul-Henning Kamp 	/* See "notes" for why we need a mutex here */
16915c672a3SPoul-Henning Kamp 	/* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
17015c672a3SPoul-Henning Kamp 	mtx_lock(&g_disk_done_mtx);
171ae2afc43SPoul-Henning Kamp 	bp->bio_completed = bp->bio_length - bp->bio_resid;
17260794e04SPoul-Henning Kamp 
17360794e04SPoul-Henning Kamp 	bp2 = bp->bio_parent;
17460794e04SPoul-Henning Kamp 	dp = bp2->bio_to->geom->softc;
17560794e04SPoul-Henning Kamp 	if (bp2->bio_error == 0)
17660794e04SPoul-Henning Kamp 		bp2->bio_error = bp->bio_error;
17760794e04SPoul-Henning Kamp 	bp2->bio_completed += bp->bio_completed;
17860794e04SPoul-Henning Kamp 	g_destroy_bio(bp);
17960794e04SPoul-Henning Kamp 	bp2->bio_inbed++;
18060794e04SPoul-Henning Kamp 	if (bp2->bio_children == bp2->bio_inbed) {
18181876757SPoul-Henning Kamp 		bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
18281876757SPoul-Henning Kamp 		devstat_end_transaction_bio(dp->d_devstat, bp2);
18360794e04SPoul-Henning Kamp 		g_io_deliver(bp2, bp2->bio_error);
18460794e04SPoul-Henning Kamp 	}
18515c672a3SPoul-Henning Kamp 	mtx_unlock(&g_disk_done_mtx);
186dd84a43cSPoul-Henning Kamp }
187dd84a43cSPoul-Henning Kamp 
188dd84a43cSPoul-Henning Kamp static void
189dd84a43cSPoul-Henning Kamp g_disk_start(struct bio *bp)
190dd84a43cSPoul-Henning Kamp {
19115c672a3SPoul-Henning Kamp 	struct bio *bp2, *bp3;
192dd84a43cSPoul-Henning Kamp 	struct disk *dp;
193a5b2e75dSPoul-Henning Kamp 	struct g_ioctl *gio;
194a5b2e75dSPoul-Henning Kamp 	int error;
19515c672a3SPoul-Henning Kamp 	off_t off;
196dd84a43cSPoul-Henning Kamp 
197dd84a43cSPoul-Henning Kamp 	dp = bp->bio_to->geom->softc;
198b362694cSPoul-Henning Kamp 	error = EJUSTRETURN;
199dd84a43cSPoul-Henning Kamp 	switch(bp->bio_cmd) {
200b362694cSPoul-Henning Kamp 	case BIO_DELETE:
20131a1093fSPoul-Henning Kamp 		if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
202b362694cSPoul-Henning Kamp 			error = 0;
203b362694cSPoul-Henning Kamp 			break;
204b362694cSPoul-Henning Kamp 		}
205b362694cSPoul-Henning Kamp 		/* fall-through */
206dd84a43cSPoul-Henning Kamp 	case BIO_READ:
207dd84a43cSPoul-Henning Kamp 	case BIO_WRITE:
20815c672a3SPoul-Henning Kamp 		off = 0;
20915c672a3SPoul-Henning Kamp 		bp3 = NULL;
210dd84a43cSPoul-Henning Kamp 		bp2 = g_clone_bio(bp);
211a4210653SPoul-Henning Kamp 		if (bp2 == NULL) {
212a4210653SPoul-Henning Kamp 			error = ENOMEM;
213a4210653SPoul-Henning Kamp 			break;
214a4210653SPoul-Henning Kamp 		}
21581876757SPoul-Henning Kamp 		devstat_start_transaction_bio(dp->d_devstat, bp);
21615c672a3SPoul-Henning Kamp 		do {
21715c672a3SPoul-Henning Kamp 			bp2->bio_offset += off;
21815c672a3SPoul-Henning Kamp 			bp2->bio_length -= off;
21996365d3dSTor Egge 			bp2->bio_data += off;
22015c672a3SPoul-Henning Kamp 			if (bp2->bio_length > dp->d_maxsize) {
22115c672a3SPoul-Henning Kamp 				/*
22215c672a3SPoul-Henning Kamp 				 * XXX: If we have a stripesize we should really
22315c672a3SPoul-Henning Kamp 				 * use it here.
22415c672a3SPoul-Henning Kamp 				 */
22515c672a3SPoul-Henning Kamp 				bp2->bio_length = dp->d_maxsize;
22615c672a3SPoul-Henning Kamp 				off += dp->d_maxsize;
22715c672a3SPoul-Henning Kamp 				/*
22815c672a3SPoul-Henning Kamp 				 * To avoid a race, we need to grab the next bio
22915c672a3SPoul-Henning Kamp 				 * before we schedule this one.  See "notes".
23015c672a3SPoul-Henning Kamp 				 */
23115c672a3SPoul-Henning Kamp 				bp3 = g_clone_bio(bp);
23215c672a3SPoul-Henning Kamp 				if (bp3 == NULL)
23315c672a3SPoul-Henning Kamp 					bp->bio_error = ENOMEM;
23415c672a3SPoul-Henning Kamp 			}
235dd84a43cSPoul-Henning Kamp 			bp2->bio_done = g_disk_done;
236dd84a43cSPoul-Henning Kamp 			bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
237b362694cSPoul-Henning Kamp 			bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
238dd84a43cSPoul-Henning Kamp 			bp2->bio_bcount = bp2->bio_length;
239ffa91881SPoul-Henning Kamp 			bp2->bio_disk = dp;
2405a67919aSPoul-Henning Kamp 			g_disk_lock_giant(dp);
24131a1093fSPoul-Henning Kamp 			dp->d_strategy(bp2);
2425a67919aSPoul-Henning Kamp 			g_disk_unlock_giant(dp);
24315c672a3SPoul-Henning Kamp 			bp2 = bp3;
24415c672a3SPoul-Henning Kamp 			bp3 = NULL;
24515c672a3SPoul-Henning Kamp 		} while (bp2 != NULL);
246dd84a43cSPoul-Henning Kamp 		break;
247dd84a43cSPoul-Henning Kamp 	case BIO_GETATTR:
2483f12caa1SPoul-Henning Kamp 		if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
249a5b2e75dSPoul-Henning Kamp 			break;
2507812d86fSPoul-Henning Kamp 		else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
251a5b2e75dSPoul-Henning Kamp 			break;
252503abe45SPoul-Henning Kamp 		else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
2531bdb20a6SPoul-Henning Kamp 			break;
25495c24b31SPoul-Henning Kamp 		else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
25595c24b31SPoul-Henning Kamp 			g_disk_kerneldump(bp, dp);
2567da1ebfdSPoul-Henning Kamp 		else if ((g_debugflags & G_F_DISKIOCTL) &&
2577da1ebfdSPoul-Henning Kamp 		    (dp->d_ioctl != NULL) &&
25831a1093fSPoul-Henning Kamp 		    !strcmp(bp->bio_attribute, "GEOM::ioctl") &&
259a5b2e75dSPoul-Henning Kamp 		    bp->bio_length == sizeof *gio) {
260adfa3213SPoul-Henning Kamp 			gio = (struct g_ioctl *)bp->bio_data;
26151dd8980SPoul-Henning Kamp 			gio->dev =  dp;
26298bbd7aaSPoul-Henning Kamp 			gio->func = (d_ioctl_t *)(dp->d_ioctl);
263adfa3213SPoul-Henning Kamp 			error = EDIRIOCTL;
264a5b2e75dSPoul-Henning Kamp 		} else
265a5b2e75dSPoul-Henning Kamp 			error = ENOIOCTL;
266a5b2e75dSPoul-Henning Kamp 		break;
2671fc1a1efSPoul-Henning Kamp 	case BIO_SETATTR:
2681fc1a1efSPoul-Henning Kamp 		error = ENOIOCTL;
2691fc1a1efSPoul-Henning Kamp 		break;
270dd84a43cSPoul-Henning Kamp 	default:
271a5b2e75dSPoul-Henning Kamp 		error = EOPNOTSUPP;
272a5b2e75dSPoul-Henning Kamp 		break;
273dd84a43cSPoul-Henning Kamp 	}
274b362694cSPoul-Henning Kamp 	if (error != EJUSTRETURN)
27572840432SPoul-Henning Kamp 		g_io_deliver(bp, error);
276a5b2e75dSPoul-Henning Kamp 	return;
277dd84a43cSPoul-Henning Kamp }
278dd84a43cSPoul-Henning Kamp 
2798523987bSPoul-Henning Kamp static void
2800f9d3dbaSPoul-Henning Kamp g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
2818f9628a1SPoul-Henning Kamp {
2828f9628a1SPoul-Henning Kamp 	struct disk *dp;
2838f9628a1SPoul-Henning Kamp 
2848f9628a1SPoul-Henning Kamp 	dp = gp->softc;
285d518e539SPoul-Henning Kamp 	if (indent == NULL) {
286d518e539SPoul-Henning Kamp 		sbuf_printf(sb, " hd %u", dp->d_fwheads);
287d518e539SPoul-Henning Kamp 		sbuf_printf(sb, " sc %u", dp->d_fwsectors);
288d518e539SPoul-Henning Kamp 		return;
289d518e539SPoul-Henning Kamp 	}
2909e2ebaa0SPoul-Henning Kamp 	if (pp != NULL) {
2918f9628a1SPoul-Henning Kamp 		sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
2928f9628a1SPoul-Henning Kamp 		    indent, dp->d_fwheads);
2938f9628a1SPoul-Henning Kamp 		sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
2948f9628a1SPoul-Henning Kamp 		    indent, dp->d_fwsectors);
2958f9628a1SPoul-Henning Kamp 	}
2968f9628a1SPoul-Henning Kamp }
2978f9628a1SPoul-Henning Kamp 
2988f9628a1SPoul-Henning Kamp static void
2998523987bSPoul-Henning Kamp g_disk_create(void *arg)
300dd84a43cSPoul-Henning Kamp {
301dd84a43cSPoul-Henning Kamp 	struct g_geom *gp;
302dd84a43cSPoul-Henning Kamp 	struct g_provider *pp;
303bb17c5f6SPoul-Henning Kamp 	struct disk *dp;
304dd84a43cSPoul-Henning Kamp 
3058523987bSPoul-Henning Kamp 	g_topology_assert();
306bb17c5f6SPoul-Henning Kamp 	dp = arg;
307bb17c5f6SPoul-Henning Kamp 	gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
3088523987bSPoul-Henning Kamp 	gp->start = g_disk_start;
3098523987bSPoul-Henning Kamp 	gp->access = g_disk_access;
310bb17c5f6SPoul-Henning Kamp 	gp->softc = dp;
3118f9628a1SPoul-Henning Kamp 	gp->dumpconf = g_disk_dumpconf;
312bb17c5f6SPoul-Henning Kamp 	dp->d_geom = gp;
3138523987bSPoul-Henning Kamp 	pp = g_new_providerf(gp, "%s", gp->name);
314bb17c5f6SPoul-Henning Kamp 	pp->mediasize = dp->d_mediasize;
315bb17c5f6SPoul-Henning Kamp 	pp->sectorsize = dp->d_sectorsize;
316bb17c5f6SPoul-Henning Kamp 	if (dp->d_flags & DISKFLAG_CANDELETE)
317bb17c5f6SPoul-Henning Kamp 		pp->flags |= G_PF_CANDELETE;
3188a63edc3SPoul-Henning Kamp 	pp->stripeoffset = dp->d_stripeoffset;
3198a63edc3SPoul-Henning Kamp 	pp->stripesize = dp->d_stripesize;
3208523987bSPoul-Henning Kamp 	g_error_provider(pp, 0);
3213d5500fcSPoul-Henning Kamp 	if (bootverbose)
3223d5500fcSPoul-Henning Kamp 		printf("GEOM: new disk %s\n", gp->name);
323dd84a43cSPoul-Henning Kamp }
3248523987bSPoul-Henning Kamp 
3258523987bSPoul-Henning Kamp 
3268523987bSPoul-Henning Kamp 
32798bbd7aaSPoul-Henning Kamp void
32898bbd7aaSPoul-Henning Kamp disk_create(int unit, struct disk *dp, int flags, void *unused __unused, void * unused2 __unused)
3298523987bSPoul-Henning Kamp {
3308523987bSPoul-Henning Kamp 
331bb17c5f6SPoul-Henning Kamp 	dp->d_unit = unit;
33231a1093fSPoul-Henning Kamp 	dp->d_flags = flags;
33331a1093fSPoul-Henning Kamp 	KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
33431a1093fSPoul-Henning Kamp 	KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
33531a1093fSPoul-Henning Kamp 	KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
336237d2765SPoul-Henning Kamp 	KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
33709f95804SPoul-Henning Kamp 	dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
33860794e04SPoul-Henning Kamp 	    dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
33960794e04SPoul-Henning Kamp 	    DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
340bb17c5f6SPoul-Henning Kamp 	g_call_me(g_disk_create, dp);
341dd84a43cSPoul-Henning Kamp }
342dd84a43cSPoul-Henning Kamp 
343dd84a43cSPoul-Henning Kamp void
344b82ff758SPoul-Henning Kamp disk_destroy(struct disk *dp)
345dd84a43cSPoul-Henning Kamp {
346dd84a43cSPoul-Henning Kamp 	struct g_geom *gp;
347dd84a43cSPoul-Henning Kamp 
34851dd8980SPoul-Henning Kamp 	gp = dp->d_geom;
349dd84a43cSPoul-Henning Kamp 	gp->flags |= G_GEOM_WITHER;
35031a1093fSPoul-Henning Kamp 	gp->softc = NULL;
351dd84a43cSPoul-Henning Kamp 	g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
35260794e04SPoul-Henning Kamp 	devstat_remove_entry(dp->d_devstat);
353dd84a43cSPoul-Henning Kamp }
354dd84a43cSPoul-Henning Kamp 
3550cc3011dSPoul-Henning Kamp static void
3560cc3011dSPoul-Henning Kamp g_kern_disks(void *p)
3570cc3011dSPoul-Henning Kamp {
3580cc3011dSPoul-Henning Kamp 	struct sbuf *sb;
3590cc3011dSPoul-Henning Kamp 	struct g_geom *gp;
3600cc3011dSPoul-Henning Kamp 	char *sp;
3610cc3011dSPoul-Henning Kamp 
3620cc3011dSPoul-Henning Kamp 	sb = p;
3630cc3011dSPoul-Henning Kamp 	sp = "";
3640cc3011dSPoul-Henning Kamp 	g_topology_assert();
3650cc3011dSPoul-Henning Kamp 	LIST_FOREACH(gp, &g_disk_class.geom, geom) {
3660cc3011dSPoul-Henning Kamp 		sbuf_printf(sb, "%s%s", sp, gp->name);
3670cc3011dSPoul-Henning Kamp 		sp = " ";
3680cc3011dSPoul-Henning Kamp 	}
3690cc3011dSPoul-Henning Kamp 	sbuf_finish(sb);
3700cc3011dSPoul-Henning Kamp 	wakeup(sb);
3710cc3011dSPoul-Henning Kamp }
3720cc3011dSPoul-Henning Kamp 
3730cc3011dSPoul-Henning Kamp static int
3740cc3011dSPoul-Henning Kamp sysctl_disks(SYSCTL_HANDLER_ARGS)
3750cc3011dSPoul-Henning Kamp {
3760cc3011dSPoul-Henning Kamp 	int error;
3770cc3011dSPoul-Henning Kamp 	struct sbuf *sb;
3780cc3011dSPoul-Henning Kamp 
3790cc3011dSPoul-Henning Kamp 	sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
3800cc3011dSPoul-Henning Kamp 	sbuf_clear(sb);
3810cc3011dSPoul-Henning Kamp 	g_call_me(g_kern_disks, sb);
3820cc3011dSPoul-Henning Kamp 	do {
3830cc3011dSPoul-Henning Kamp 		tsleep(sb, PZERO, "kern.disks", hz);
3840cc3011dSPoul-Henning Kamp 	} while(!sbuf_done(sb));
385aed99af2SPoul-Henning Kamp 	error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
3860cc3011dSPoul-Henning Kamp 	sbuf_delete(sb);
3870cc3011dSPoul-Henning Kamp 	return error;
3880cc3011dSPoul-Henning Kamp }
3890cc3011dSPoul-Henning Kamp 
3900cc3011dSPoul-Henning Kamp SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
3910cc3011dSPoul-Henning Kamp     sysctl_disks, "A", "names of available disks");
3923bd65612SPoul-Henning Kamp 
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