xref: /freebsd/sys/geom/geom_disk.c (revision 17160457b41ff26b4384d8f82ed176a2844eb272)
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("$FreeBSD$");
3850b1faefSDavid E. O'Brien 
393bd65612SPoul-Henning Kamp #include "opt_geom.h"
403bd65612SPoul-Henning Kamp 
41dd84a43cSPoul-Henning Kamp #include <sys/param.h>
42dd84a43cSPoul-Henning Kamp #include <sys/systm.h>
43dd84a43cSPoul-Henning Kamp #include <sys/kernel.h>
44dd84a43cSPoul-Henning Kamp #include <sys/sysctl.h>
45dd84a43cSPoul-Henning Kamp #include <sys/bio.h>
4642f42c99SAlan Somers #include <sys/bus.h>
47e93f5e4dSPawel Jakub Dawidek #include <sys/ctype.h>
4831a1093fSPoul-Henning Kamp #include <sys/fcntl.h>
49dd84a43cSPoul-Henning Kamp #include <sys/malloc.h>
505d807a0eSAndrey V. Elsukov #include <sys/sbuf.h>
5160794e04SPoul-Henning Kamp #include <sys/devicestat.h>
52dd84a43cSPoul-Henning Kamp #include <machine/md_var.h>
53dd84a43cSPoul-Henning Kamp 
54dd84a43cSPoul-Henning Kamp #include <sys/lock.h>
55dd84a43cSPoul-Henning Kamp #include <sys/mutex.h>
56dd84a43cSPoul-Henning Kamp #include <geom/geom.h>
574752f757SPoul-Henning Kamp #include <geom/geom_disk.h>
587da1ebfdSPoul-Henning Kamp #include <geom/geom_int.h>
59dd84a43cSPoul-Henning Kamp 
60c6d4ed3aSAlexander Motin #include <dev/led/led.h>
61c6d4ed3aSAlexander Motin 
62a9934668SKenneth D. Merry #include <machine/bus.h>
63a9934668SKenneth D. Merry 
64c6d4ed3aSAlexander Motin struct g_disk_softc {
6530ba7471SAlexander Motin 	struct mtx		 done_mtx;
66c6d4ed3aSAlexander Motin 	struct disk		*dp;
67c6d4ed3aSAlexander Motin 	struct sysctl_ctx_list	sysctl_ctx;
68c6d4ed3aSAlexander Motin 	struct sysctl_oid	*sysctl_tree;
69c6d4ed3aSAlexander Motin 	char			led[64];
70c6d4ed3aSAlexander Motin 	uint32_t		state;
7140ea77a0SAlexander Motin 	struct mtx		 start_mtx;
72c6d4ed3aSAlexander Motin };
73c6d4ed3aSAlexander Motin 
74dd84a43cSPoul-Henning Kamp static g_access_t g_disk_access;
75650ee351SPoul-Henning Kamp static g_start_t g_disk_start;
76650ee351SPoul-Henning Kamp static g_ioctl_t g_disk_ioctl;
77650ee351SPoul-Henning Kamp static g_dumpconf_t g_disk_dumpconf;
78c3fb2891SKenneth D. Merry static g_provgone_t g_disk_providergone;
79dd84a43cSPoul-Henning Kamp 
8007e95ed6SPoul-Henning Kamp static struct g_class g_disk_class = {
81252c094eSIvan Voras 	.name = G_DISK_CLASS_NAME,
825721c9c7SPoul-Henning Kamp 	.version = G_VERSION,
83650ee351SPoul-Henning Kamp 	.start = g_disk_start,
84650ee351SPoul-Henning Kamp 	.access = g_disk_access,
85650ee351SPoul-Henning Kamp 	.ioctl = g_disk_ioctl,
86c3fb2891SKenneth D. Merry 	.providergone = g_disk_providergone,
87650ee351SPoul-Henning Kamp 	.dumpconf = g_disk_dumpconf,
88dd84a43cSPoul-Henning Kamp };
89dd84a43cSPoul-Henning Kamp 
90c6d4ed3aSAlexander Motin SYSCTL_DECL(_kern_geom);
916472ac3dSEd Schouten static SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0,
926472ac3dSEd Schouten     "GEOM_DISK stuff");
93c6d4ed3aSAlexander Motin 
946c87f8d5SPoul-Henning Kamp DECLARE_GEOM_CLASS(g_disk_class, g_disk);
958523987bSPoul-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;
100c6d4ed3aSAlexander Motin 	struct g_disk_softc *sc;
101dd84a43cSPoul-Henning Kamp 	int error;
102dd84a43cSPoul-Henning Kamp 
103dd84a43cSPoul-Henning Kamp 	g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
104dd84a43cSPoul-Henning Kamp 	    pp->name, r, w, e);
105dd84a43cSPoul-Henning Kamp 	g_topology_assert();
10630ba7471SAlexander Motin 	sc = pp->private;
107c6d4ed3aSAlexander Motin 	if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
10812047230SPawel Jakub Dawidek 		/*
10912047230SPawel Jakub Dawidek 		 * Allow decreasing access count even if disk is not
110e8d57122SPedro F. Giffuni 		 * available anymore.
11112047230SPawel Jakub Dawidek 		 */
11212047230SPawel Jakub Dawidek 		if (r <= 0 && w <= 0 && e <= 0)
11312047230SPawel Jakub Dawidek 			return (0);
11412047230SPawel Jakub Dawidek 		return (ENXIO);
11512047230SPawel Jakub Dawidek 	}
116dd84a43cSPoul-Henning Kamp 	r += pp->acr;
117dd84a43cSPoul-Henning Kamp 	w += pp->acw;
118dd84a43cSPoul-Henning Kamp 	e += pp->ace;
11931a1093fSPoul-Henning Kamp 	error = 0;
120dd84a43cSPoul-Henning Kamp 	if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
12198bbd7aaSPoul-Henning Kamp 		if (dp->d_open != NULL) {
12251dd8980SPoul-Henning Kamp 			error = dp->d_open(dp);
12355fe33a3SNick Hibma 			if (bootverbose && error != 0)
12431a1093fSPoul-Henning Kamp 				printf("Opened disk %s -> %d\n",
12531a1093fSPoul-Henning Kamp 				    pp->name, error);
126c145d600SAlexander Motin 			if (error != 0)
127c145d600SAlexander Motin 				return (error);
12831a1093fSPoul-Henning Kamp 		}
1293f12caa1SPoul-Henning Kamp 		pp->sectorsize = dp->d_sectorsize;
13099af707cSPoul-Henning Kamp 		if (dp->d_maxsize == 0) {
13199af707cSPoul-Henning Kamp 			printf("WARNING: Disk drive %s%d has no d_maxsize\n",
13299af707cSPoul-Henning Kamp 			    dp->d_name, dp->d_unit);
13399af707cSPoul-Henning Kamp 			dp->d_maxsize = DFLTPHYS;
13499af707cSPoul-Henning Kamp 		}
1358383a92eSSteven Hartland 		if (dp->d_delmaxsize == 0) {
1368383a92eSSteven Hartland 			if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) {
1378383a92eSSteven Hartland 				printf("WARNING: Disk drive %s%d has no "
1388383a92eSSteven Hartland 				    "d_delmaxsize\n", dp->d_name, dp->d_unit);
1399fe9ba5bSSteven Hartland 			}
1408383a92eSSteven Hartland 			dp->d_delmaxsize = dp->d_maxsize;
1419fe9ba5bSSteven Hartland 		}
1429fe9ba5bSSteven Hartland 		pp->stripeoffset = dp->d_stripeoffset;
1439fe9ba5bSSteven Hartland 		pp->stripesize = dp->d_stripesize;
1449fe9ba5bSSteven Hartland 		dp->d_flags |= DISKFLAG_OPEN;
14504283363SAndrey V. Elsukov 		/*
14604283363SAndrey V. Elsukov 		 * Do not invoke resize event when initial size was zero.
14704283363SAndrey V. Elsukov 		 * Some disks report its size only after first opening.
14804283363SAndrey V. Elsukov 		 */
14904283363SAndrey V. Elsukov 		if (pp->mediasize == 0)
15004283363SAndrey V. Elsukov 			pp->mediasize = dp->d_mediasize;
15104283363SAndrey V. Elsukov 		else
152f1ff88cfSAndrey V. Elsukov 			g_resize_provider(pp, dp->d_mediasize);
153dd84a43cSPoul-Henning Kamp 	} else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
15498bbd7aaSPoul-Henning Kamp 		if (dp->d_close != NULL) {
15551dd8980SPoul-Henning Kamp 			error = dp->d_close(dp);
156dd84a43cSPoul-Henning Kamp 			if (error != 0)
15731a1093fSPoul-Henning Kamp 				printf("Closed disk %s -> %d\n",
15831a1093fSPoul-Henning Kamp 				    pp->name, error);
15931a1093fSPoul-Henning Kamp 		}
160c6d4ed3aSAlexander Motin 		sc->state = G_STATE_ACTIVE;
161c6d4ed3aSAlexander Motin 		if (sc->led[0] != 0)
162c6d4ed3aSAlexander Motin 			led_set(sc->led, "0");
16331a1093fSPoul-Henning Kamp 		dp->d_flags &= ~DISKFLAG_OPEN;
164dd84a43cSPoul-Henning Kamp 	}
165dd84a43cSPoul-Henning Kamp 	return (error);
166dd84a43cSPoul-Henning Kamp }
167dd84a43cSPoul-Henning Kamp 
168dd84a43cSPoul-Henning Kamp static void
16995c24b31SPoul-Henning Kamp g_disk_kerneldump(struct bio *bp, struct disk *dp)
17095c24b31SPoul-Henning Kamp {
17195c24b31SPoul-Henning Kamp 	struct g_kerneldump *gkd;
1728be2bc5cSPoul-Henning Kamp 	struct g_geom *gp;
17395c24b31SPoul-Henning Kamp 
17495c24b31SPoul-Henning Kamp 	gkd = (struct g_kerneldump*)bp->bio_data;
1758be2bc5cSPoul-Henning Kamp 	gp = bp->bio_to->geom;
1761e4b22b4SBryan Drewery 	g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)",
1778be2bc5cSPoul-Henning Kamp 		gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
1785774ceadSPoul-Henning Kamp 	if (dp->d_dump == NULL) {
1795774ceadSPoul-Henning Kamp 		g_io_deliver(bp, ENODEV);
1805774ceadSPoul-Henning Kamp 		return;
1815774ceadSPoul-Henning Kamp 	}
18206f4c96dSAlexander Motin 	gkd->di.dumper = dp->d_dump;
18306f4c96dSAlexander Motin 	gkd->di.priv = dp;
18406f4c96dSAlexander Motin 	gkd->di.blocksize = dp->d_sectorsize;
18506f4c96dSAlexander Motin 	gkd->di.maxiosize = dp->d_maxsize;
18606f4c96dSAlexander Motin 	gkd->di.mediaoffset = gkd->offset;
1873ad9f7c2SPoul-Henning Kamp 	if ((gkd->offset + gkd->length) > dp->d_mediasize)
1883ad9f7c2SPoul-Henning Kamp 		gkd->length = dp->d_mediasize - gkd->offset;
18906f4c96dSAlexander Motin 	gkd->di.mediasize = gkd->length;
19006f4c96dSAlexander Motin 	g_io_deliver(bp, 0);
19195c24b31SPoul-Henning Kamp }
19295c24b31SPoul-Henning Kamp 
19395c24b31SPoul-Henning Kamp static void
194c6d4ed3aSAlexander Motin g_disk_setstate(struct bio *bp, struct g_disk_softc *sc)
195c6d4ed3aSAlexander Motin {
196c6d4ed3aSAlexander Motin 	const char *cmd;
197c6d4ed3aSAlexander Motin 
198c6d4ed3aSAlexander Motin 	memcpy(&sc->state, bp->bio_data, sizeof(sc->state));
199c6d4ed3aSAlexander Motin 	if (sc->led[0] != 0) {
200c6d4ed3aSAlexander Motin 		switch (sc->state) {
201c6d4ed3aSAlexander Motin 		case G_STATE_FAILED:
202c6d4ed3aSAlexander Motin 			cmd = "1";
203c6d4ed3aSAlexander Motin 			break;
204c6d4ed3aSAlexander Motin 		case G_STATE_REBUILD:
205c6d4ed3aSAlexander Motin 			cmd = "f5";
206c6d4ed3aSAlexander Motin 			break;
207c6d4ed3aSAlexander Motin 		case G_STATE_RESYNC:
208c6d4ed3aSAlexander Motin 			cmd = "f1";
209c6d4ed3aSAlexander Motin 			break;
210c6d4ed3aSAlexander Motin 		default:
211c6d4ed3aSAlexander Motin 			cmd = "0";
212c6d4ed3aSAlexander Motin 			break;
213c6d4ed3aSAlexander Motin 		}
214c6d4ed3aSAlexander Motin 		led_set(sc->led, cmd);
215c6d4ed3aSAlexander Motin 	}
216c6d4ed3aSAlexander Motin 	g_io_deliver(bp, 0);
217c6d4ed3aSAlexander Motin }
218c6d4ed3aSAlexander Motin 
219c6d4ed3aSAlexander Motin static void
220dd84a43cSPoul-Henning Kamp g_disk_done(struct bio *bp)
221dd84a43cSPoul-Henning Kamp {
222e431d66cSAlexander Motin 	struct bintime now;
22360794e04SPoul-Henning Kamp 	struct bio *bp2;
224c6d4ed3aSAlexander Motin 	struct g_disk_softc *sc;
225dd84a43cSPoul-Henning Kamp 
22615c672a3SPoul-Henning Kamp 	/* See "notes" for why we need a mutex here */
22715c672a3SPoul-Henning Kamp 	/* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
22860794e04SPoul-Henning Kamp 	bp2 = bp->bio_parent;
22930ba7471SAlexander Motin 	sc = bp2->bio_to->private;
23030ba7471SAlexander Motin 	bp->bio_completed = bp->bio_length - bp->bio_resid;
231e431d66cSAlexander Motin 	binuptime(&now);
23230ba7471SAlexander Motin 	mtx_lock(&sc->done_mtx);
23360794e04SPoul-Henning Kamp 	if (bp2->bio_error == 0)
23460794e04SPoul-Henning Kamp 		bp2->bio_error = bp->bio_error;
23560794e04SPoul-Henning Kamp 	bp2->bio_completed += bp->bio_completed;
2369a6844d5SKenneth D. Merry 
2378076d204SWarner Losh 	switch (bp->bio_cmd) {
2389a6844d5SKenneth D. Merry 	case BIO_ZONE:
2399a6844d5SKenneth D. Merry 		bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone));
2409a6844d5SKenneth D. Merry 		/*FALLTHROUGH*/
2418076d204SWarner Losh 	case BIO_READ:
2428076d204SWarner Losh 	case BIO_WRITE:
2438076d204SWarner Losh 	case BIO_DELETE:
2448076d204SWarner Losh 	case BIO_FLUSH:
245e431d66cSAlexander Motin 		devstat_end_transaction_bio_bt(sc->dp->d_devstat, bp, &now);
2468076d204SWarner Losh 		break;
2478076d204SWarner Losh 	default:
2488076d204SWarner Losh 		break;
2498076d204SWarner Losh 	}
25060794e04SPoul-Henning Kamp 	bp2->bio_inbed++;
25160794e04SPoul-Henning Kamp 	if (bp2->bio_children == bp2->bio_inbed) {
2520fd2511aSAlexander Motin 		mtx_unlock(&sc->done_mtx);
25381876757SPoul-Henning Kamp 		bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
25460794e04SPoul-Henning Kamp 		g_io_deliver(bp2, bp2->bio_error);
2550fd2511aSAlexander Motin 	} else
25630ba7471SAlexander Motin 		mtx_unlock(&sc->done_mtx);
2570fd2511aSAlexander Motin 	g_destroy_bio(bp);
258dd84a43cSPoul-Henning Kamp }
259dd84a43cSPoul-Henning Kamp 
260497c3347SPoul-Henning Kamp static int
2612221dbebSPoul-Henning Kamp g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
262497c3347SPoul-Henning Kamp {
263497c3347SPoul-Henning Kamp 	struct disk *dp;
264c6d4ed3aSAlexander Motin 	struct g_disk_softc *sc;
265497c3347SPoul-Henning Kamp 	int error;
266497c3347SPoul-Henning Kamp 
26730ba7471SAlexander Motin 	sc = pp->private;
268c6d4ed3aSAlexander Motin 	dp = sc->dp;
269497c3347SPoul-Henning Kamp 
270497c3347SPoul-Henning Kamp 	if (dp->d_ioctl == NULL)
271497c3347SPoul-Henning Kamp 		return (ENOIOCTL);
2722221dbebSPoul-Henning Kamp 	error = dp->d_ioctl(dp, cmd, data, fflag, td);
273497c3347SPoul-Henning Kamp 	return (error);
274497c3347SPoul-Henning Kamp }
275497c3347SPoul-Henning Kamp 
27642fbdde4SKenneth D. Merry static off_t
27742fbdde4SKenneth D. Merry g_disk_maxsize(struct disk *dp, struct bio *bp)
278a9934668SKenneth D. Merry {
27942fbdde4SKenneth D. Merry 	if (bp->bio_cmd == BIO_DELETE)
28042fbdde4SKenneth D. Merry 		return (dp->d_delmaxsize);
28142fbdde4SKenneth D. Merry 	return (dp->d_maxsize);
28242fbdde4SKenneth D. Merry }
28342fbdde4SKenneth D. Merry 
28442fbdde4SKenneth D. Merry static int
28542fbdde4SKenneth D. Merry g_disk_maxsegs(struct disk *dp, struct bio *bp)
28642fbdde4SKenneth D. Merry {
28742fbdde4SKenneth D. Merry 	return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1);
288a9934668SKenneth D. Merry }
289a9934668SKenneth D. Merry 
290a9934668SKenneth D. Merry static void
291a9934668SKenneth D. Merry g_disk_advance(struct disk *dp, struct bio *bp, off_t off)
292a9934668SKenneth D. Merry {
293a9934668SKenneth D. Merry 
294a9934668SKenneth D. Merry 	bp->bio_offset += off;
295a9934668SKenneth D. Merry 	bp->bio_length -= off;
296a9934668SKenneth D. Merry 
297a9934668SKenneth D. Merry 	if ((bp->bio_flags & BIO_VLIST) != 0) {
298a9934668SKenneth D. Merry 		bus_dma_segment_t *seg, *end;
299a9934668SKenneth D. Merry 
300a9934668SKenneth D. Merry 		seg = (bus_dma_segment_t *)bp->bio_data;
301a9934668SKenneth D. Merry 		end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
302a9934668SKenneth D. Merry 		off += bp->bio_ma_offset;
303a9934668SKenneth D. Merry 		while (off >= seg->ds_len) {
304a9934668SKenneth D. Merry 			KASSERT((seg != end),
305a9934668SKenneth D. Merry 			    ("vlist request runs off the end"));
306a9934668SKenneth D. Merry 			off -= seg->ds_len;
307a9934668SKenneth D. Merry 			seg++;
308a9934668SKenneth D. Merry 		}
309a9934668SKenneth D. Merry 		bp->bio_ma_offset = off;
310a9934668SKenneth D. Merry 		bp->bio_ma_n = end - seg;
311a9934668SKenneth D. Merry 		bp->bio_data = (void *)seg;
312a9934668SKenneth D. Merry 	} else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
313a9934668SKenneth D. Merry 		bp->bio_ma += off / PAGE_SIZE;
314a9934668SKenneth D. Merry 		bp->bio_ma_offset += off;
315a9934668SKenneth D. Merry 		bp->bio_ma_offset %= PAGE_SIZE;
316a9934668SKenneth D. Merry 		bp->bio_ma_n -= off / PAGE_SIZE;
317a9934668SKenneth D. Merry 	} else {
318a9934668SKenneth D. Merry 		bp->bio_data += off;
319a9934668SKenneth D. Merry 	}
320a9934668SKenneth D. Merry }
321a9934668SKenneth D. Merry 
322a9934668SKenneth D. Merry static void
323a9934668SKenneth D. Merry g_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset,
324a9934668SKenneth D. Merry     off_t *plength, int *ppages)
325a9934668SKenneth D. Merry {
326a9934668SKenneth D. Merry 	uintptr_t seg_page_base;
327a9934668SKenneth D. Merry 	uintptr_t seg_page_end;
328a9934668SKenneth D. Merry 	off_t offset;
329a9934668SKenneth D. Merry 	off_t length;
330a9934668SKenneth D. Merry 	int seg_pages;
331a9934668SKenneth D. Merry 
332a9934668SKenneth D. Merry 	offset = *poffset;
333a9934668SKenneth D. Merry 	length = *plength;
334a9934668SKenneth D. Merry 
335a9934668SKenneth D. Merry 	if (length > seg->ds_len - offset)
336a9934668SKenneth D. Merry 		length = seg->ds_len - offset;
337a9934668SKenneth D. Merry 
338a9934668SKenneth D. Merry 	seg_page_base = trunc_page(seg->ds_addr + offset);
339a9934668SKenneth D. Merry 	seg_page_end  = round_page(seg->ds_addr + offset + length);
340a9934668SKenneth D. Merry 	seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT;
341a9934668SKenneth D. Merry 
342a9934668SKenneth D. Merry 	if (seg_pages > *ppages) {
343a9934668SKenneth D. Merry 		seg_pages = *ppages;
344a9934668SKenneth D. Merry 		length = (seg_page_base + (seg_pages << PAGE_SHIFT)) -
345a9934668SKenneth D. Merry 		    (seg->ds_addr + offset);
346a9934668SKenneth D. Merry 	}
347a9934668SKenneth D. Merry 
348a9934668SKenneth D. Merry 	*poffset = 0;
349a9934668SKenneth D. Merry 	*plength -= length;
350a9934668SKenneth D. Merry 	*ppages -= seg_pages;
351a9934668SKenneth D. Merry }
352a9934668SKenneth D. Merry 
353a9934668SKenneth D. Merry static off_t
354a9934668SKenneth D. Merry g_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg)
355a9934668SKenneth D. Merry {
356a9934668SKenneth D. Merry 	bus_dma_segment_t *seg, *end;
357a9934668SKenneth D. Merry 	off_t residual;
358a9934668SKenneth D. Merry 	off_t offset;
359a9934668SKenneth D. Merry 	int pages;
360a9934668SKenneth D. Merry 
361a9934668SKenneth D. Merry 	seg = (bus_dma_segment_t *)bp->bio_data;
362a9934668SKenneth D. Merry 	end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n;
363a9934668SKenneth D. Merry 	residual = bp->bio_length;
364a9934668SKenneth D. Merry 	offset = bp->bio_ma_offset;
36542fbdde4SKenneth D. Merry 	pages = g_disk_maxsegs(dp, bp);
366a9934668SKenneth D. Merry 	while (residual != 0 && pages != 0) {
367a9934668SKenneth D. Merry 		KASSERT((seg != end),
368a9934668SKenneth D. Merry 		    ("vlist limit runs off the end"));
369a9934668SKenneth D. Merry 		g_disk_seg_limit(seg, &offset, &residual, &pages);
370a9934668SKenneth D. Merry 		seg++;
371a9934668SKenneth D. Merry 	}
372a9934668SKenneth D. Merry 	if (pendseg != NULL)
373a9934668SKenneth D. Merry 		*pendseg = seg;
374a9934668SKenneth D. Merry 	return (residual);
375a9934668SKenneth D. Merry }
376a9934668SKenneth D. Merry 
377a9934668SKenneth D. Merry static bool
378a9934668SKenneth D. Merry g_disk_limit(struct disk *dp, struct bio *bp)
379a9934668SKenneth D. Merry {
380a9934668SKenneth D. Merry 	bool limited = false;
381985108aeSKenneth D. Merry 	off_t maxsz;
382985108aeSKenneth D. Merry 
383985108aeSKenneth D. Merry 	maxsz = g_disk_maxsize(dp, bp);
384a9934668SKenneth D. Merry 
385a9934668SKenneth D. Merry 	/*
386a9934668SKenneth D. Merry 	 * XXX: If we have a stripesize we should really use it here.
387a9934668SKenneth D. Merry 	 *      Care should be taken in the delete case if this is done
388a9934668SKenneth D. Merry 	 *      as deletes can be very sensitive to size given how they
389a9934668SKenneth D. Merry 	 *      are processed.
390a9934668SKenneth D. Merry 	 */
39142fbdde4SKenneth D. Merry 	if (bp->bio_length > maxsz) {
39242fbdde4SKenneth D. Merry 		bp->bio_length = maxsz;
393a9934668SKenneth D. Merry 		limited = true;
394a9934668SKenneth D. Merry 	}
395a9934668SKenneth D. Merry 
396a9934668SKenneth D. Merry 	if ((bp->bio_flags & BIO_VLIST) != 0) {
397a9934668SKenneth D. Merry 		bus_dma_segment_t *firstseg, *endseg;
398a9934668SKenneth D. Merry 		off_t residual;
399a9934668SKenneth D. Merry 
400a9934668SKenneth D. Merry 		firstseg = (bus_dma_segment_t*)bp->bio_data;
401a9934668SKenneth D. Merry 		residual = g_disk_vlist_limit(dp, bp, &endseg);
402a9934668SKenneth D. Merry 		if (residual != 0) {
403a9934668SKenneth D. Merry 			bp->bio_ma_n = endseg - firstseg;
404a9934668SKenneth D. Merry 			bp->bio_length -= residual;
405a9934668SKenneth D. Merry 			limited = true;
406a9934668SKenneth D. Merry 		}
407a9934668SKenneth D. Merry 	} else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
408a9934668SKenneth D. Merry 		bp->bio_ma_n =
409a9934668SKenneth D. Merry 		    howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE);
410a9934668SKenneth D. Merry 	}
411a9934668SKenneth D. Merry 
412a9934668SKenneth D. Merry 	return (limited);
413a9934668SKenneth D. Merry }
414a9934668SKenneth D. Merry 
415dd84a43cSPoul-Henning Kamp static void
416dd84a43cSPoul-Henning Kamp g_disk_start(struct bio *bp)
417dd84a43cSPoul-Henning Kamp {
41815c672a3SPoul-Henning Kamp 	struct bio *bp2, *bp3;
419dd84a43cSPoul-Henning Kamp 	struct disk *dp;
420c6d4ed3aSAlexander Motin 	struct g_disk_softc *sc;
421a5b2e75dSPoul-Henning Kamp 	int error;
422ccf8a568SAlexander Motin 	off_t off;
423dd84a43cSPoul-Henning Kamp 
4248532d381SConrad Meyer 	biotrack(bp, __func__);
4258532d381SConrad Meyer 
42630ba7471SAlexander Motin 	sc = bp->bio_to->private;
427c6d4ed3aSAlexander Motin 	if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) {
42867fd2837SPoul-Henning Kamp 		g_io_deliver(bp, ENXIO);
429b3fd9b46SPoul-Henning Kamp 		return;
430b3fd9b46SPoul-Henning Kamp 	}
431b362694cSPoul-Henning Kamp 	error = EJUSTRETURN;
432dd84a43cSPoul-Henning Kamp 	switch(bp->bio_cmd) {
433b362694cSPoul-Henning Kamp 	case BIO_DELETE:
43431a1093fSPoul-Henning Kamp 		if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
43592f84a9fSPawel Jakub Dawidek 			error = EOPNOTSUPP;
436b362694cSPoul-Henning Kamp 			break;
437b362694cSPoul-Henning Kamp 		}
438b362694cSPoul-Henning Kamp 		/* fall-through */
439dd84a43cSPoul-Henning Kamp 	case BIO_READ:
440dd84a43cSPoul-Henning Kamp 	case BIO_WRITE:
441a9934668SKenneth D. Merry 		KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 ||
442a9934668SKenneth D. Merry 		    (bp->bio_flags & BIO_UNMAPPED) == 0,
443a9934668SKenneth D. Merry 		    ("unmapped bio not supported by disk %s", dp->d_name));
44415c672a3SPoul-Henning Kamp 		off = 0;
44515c672a3SPoul-Henning Kamp 		bp3 = NULL;
446dd84a43cSPoul-Henning Kamp 		bp2 = g_clone_bio(bp);
447a4210653SPoul-Henning Kamp 		if (bp2 == NULL) {
448a4210653SPoul-Henning Kamp 			error = ENOMEM;
449a4210653SPoul-Henning Kamp 			break;
450a4210653SPoul-Henning Kamp 		}
451a9934668SKenneth D. Merry 		for (;;) {
452a9934668SKenneth D. Merry 			if (g_disk_limit(dp, bp2)) {
453a9934668SKenneth D. Merry 				off += bp2->bio_length;
454ccf8a568SAlexander Motin 
45515c672a3SPoul-Henning Kamp 				/*
45615c672a3SPoul-Henning Kamp 				 * To avoid a race, we need to grab the next bio
45715c672a3SPoul-Henning Kamp 				 * before we schedule this one.  See "notes".
45815c672a3SPoul-Henning Kamp 				 */
45915c672a3SPoul-Henning Kamp 				bp3 = g_clone_bio(bp);
46015c672a3SPoul-Henning Kamp 				if (bp3 == NULL)
46115c672a3SPoul-Henning Kamp 					bp->bio_error = ENOMEM;
46215c672a3SPoul-Henning Kamp 			}
463dd84a43cSPoul-Henning Kamp 			bp2->bio_done = g_disk_done;
464b362694cSPoul-Henning Kamp 			bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
465dd84a43cSPoul-Henning Kamp 			bp2->bio_bcount = bp2->bio_length;
466ffa91881SPoul-Henning Kamp 			bp2->bio_disk = dp;
46740ea77a0SAlexander Motin 			mtx_lock(&sc->start_mtx);
4682e93e909STor Egge 			devstat_start_transaction_bio(dp->d_devstat, bp2);
46940ea77a0SAlexander Motin 			mtx_unlock(&sc->start_mtx);
47031a1093fSPoul-Henning Kamp 			dp->d_strategy(bp2);
471a9934668SKenneth D. Merry 
472a9934668SKenneth D. Merry 			if (bp3 == NULL)
473a9934668SKenneth D. Merry 				break;
474a9934668SKenneth D. Merry 
47515c672a3SPoul-Henning Kamp 			bp2 = bp3;
47615c672a3SPoul-Henning Kamp 			bp3 = NULL;
477a9934668SKenneth D. Merry 			g_disk_advance(dp, bp2, off);
478a9934668SKenneth D. Merry 		}
479dd84a43cSPoul-Henning Kamp 		break;
480dd84a43cSPoul-Henning Kamp 	case BIO_GETATTR:
481416494d7SJustin T. Gibbs 		/* Give the driver a chance to override */
482416494d7SJustin T. Gibbs 		if (dp->d_getattr != NULL) {
483416494d7SJustin T. Gibbs 			if (bp->bio_disk == NULL)
484416494d7SJustin T. Gibbs 				bp->bio_disk = dp;
485416494d7SJustin T. Gibbs 			error = dp->d_getattr(bp);
486416494d7SJustin T. Gibbs 			if (error != -1)
487416494d7SJustin T. Gibbs 				break;
488416494d7SJustin T. Gibbs 			error = EJUSTRETURN;
489416494d7SJustin T. Gibbs 		}
490d91e813cSKonstantin Belousov 		if (g_handleattr_int(bp, "GEOM::candelete",
491d91e813cSKonstantin Belousov 		    (dp->d_flags & DISKFLAG_CANDELETE) != 0))
492d91e813cSKonstantin Belousov 			break;
493d91e813cSKonstantin Belousov 		else if (g_handleattr_int(bp, "GEOM::fwsectors",
494d91e813cSKonstantin Belousov 		    dp->d_fwsectors))
495a5b2e75dSPoul-Henning Kamp 			break;
4967812d86fSPoul-Henning Kamp 		else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
497a5b2e75dSPoul-Henning Kamp 			break;
498503abe45SPoul-Henning Kamp 		else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
4991bdb20a6SPoul-Henning Kamp 			break;
500d0c11f9eSPawel Jakub Dawidek 		else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
501d0c11f9eSPawel Jakub Dawidek 			break;
502c28078e9SSteven Hartland 		else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor",
503c28078e9SSteven Hartland 		    dp->d_hba_vendor))
5048edcf694SAlexander Motin 			break;
505c28078e9SSteven Hartland 		else if (g_handleattr_uint16_t(bp, "GEOM::hba_device",
506c28078e9SSteven Hartland 		    dp->d_hba_device))
5078edcf694SAlexander Motin 			break;
508c28078e9SSteven Hartland 		else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor",
509c28078e9SSteven Hartland 		    dp->d_hba_subvendor))
5108edcf694SAlexander Motin 			break;
511c28078e9SSteven Hartland 		else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice",
512c28078e9SSteven Hartland 		    dp->d_hba_subdevice))
5138edcf694SAlexander Motin 			break;
51495c24b31SPoul-Henning Kamp 		else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
51595c24b31SPoul-Henning Kamp 			g_disk_kerneldump(bp, dp);
516c6d4ed3aSAlexander Motin 		else if (!strcmp(bp->bio_attribute, "GEOM::setstate"))
517c6d4ed3aSAlexander Motin 			g_disk_setstate(bp, sc);
518c28078e9SSteven Hartland 		else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate",
519c28078e9SSteven Hartland 		    dp->d_rotation_rate))
520c28078e9SSteven Hartland 			break;
521497c3347SPoul-Henning Kamp 		else
522a5b2e75dSPoul-Henning Kamp 			error = ENOIOCTL;
523a5b2e75dSPoul-Henning Kamp 		break;
5241d2aee20SPawel Jakub Dawidek 	case BIO_FLUSH:
52585f5b9aaSAndriy Gapon 		g_trace(G_T_BIO, "g_disk_flushcache(%s)",
5261d2aee20SPawel Jakub Dawidek 		    bp->bio_to->name);
5271d2aee20SPawel Jakub Dawidek 		if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
52892f84a9fSPawel Jakub Dawidek 			error = EOPNOTSUPP;
52992f84a9fSPawel Jakub Dawidek 			break;
5301d2aee20SPawel Jakub Dawidek 		}
5319a6844d5SKenneth D. Merry 		/*FALLTHROUGH*/
5329a6844d5SKenneth D. Merry 	case BIO_ZONE:
5339a6844d5SKenneth D. Merry 		if (bp->bio_cmd == BIO_ZONE) {
5349a6844d5SKenneth D. Merry 			if (!(dp->d_flags & DISKFLAG_CANZONE)) {
5359a6844d5SKenneth D. Merry 				error = EOPNOTSUPP;
5369a6844d5SKenneth D. Merry 				break;
5379a6844d5SKenneth D. Merry 			}
5389a6844d5SKenneth D. Merry 			g_trace(G_T_BIO, "g_disk_zone(%s)",
5399a6844d5SKenneth D. Merry 			    bp->bio_to->name);
5409a6844d5SKenneth D. Merry 		}
541ccf8a568SAlexander Motin 		bp2 = g_clone_bio(bp);
542ccf8a568SAlexander Motin 		if (bp2 == NULL) {
543ccf8a568SAlexander Motin 			g_io_deliver(bp, ENOMEM);
544ccf8a568SAlexander Motin 			return;
545ccf8a568SAlexander Motin 		}
546ccf8a568SAlexander Motin 		bp2->bio_done = g_disk_done;
547ccf8a568SAlexander Motin 		bp2->bio_disk = dp;
548413037c8SAlexander Motin 		mtx_lock(&sc->start_mtx);
549ccf8a568SAlexander Motin 		devstat_start_transaction_bio(dp->d_devstat, bp2);
550413037c8SAlexander Motin 		mtx_unlock(&sc->start_mtx);
551ccf8a568SAlexander Motin 		dp->d_strategy(bp2);
5521d2aee20SPawel Jakub Dawidek 		break;
553dd84a43cSPoul-Henning Kamp 	default:
554a5b2e75dSPoul-Henning Kamp 		error = EOPNOTSUPP;
555a5b2e75dSPoul-Henning Kamp 		break;
556dd84a43cSPoul-Henning Kamp 	}
557b362694cSPoul-Henning Kamp 	if (error != EJUSTRETURN)
55872840432SPoul-Henning Kamp 		g_io_deliver(bp, error);
559a5b2e75dSPoul-Henning Kamp 	return;
560dd84a43cSPoul-Henning Kamp }
561dd84a43cSPoul-Henning Kamp 
5628523987bSPoul-Henning Kamp static void
5630f9d3dbaSPoul-Henning Kamp g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
5648f9628a1SPoul-Henning Kamp {
565ccba7102SAlexander Motin 	struct bio *bp;
5668f9628a1SPoul-Henning Kamp 	struct disk *dp;
567c6d4ed3aSAlexander Motin 	struct g_disk_softc *sc;
568ccba7102SAlexander Motin 	char *buf;
569ccba7102SAlexander Motin 	int res = 0;
5708f9628a1SPoul-Henning Kamp 
571c6d4ed3aSAlexander Motin 	sc = gp->softc;
572c6d4ed3aSAlexander Motin 	if (sc == NULL || (dp = sc->dp) == NULL)
573eb98005fSPoul-Henning Kamp 		return;
574d518e539SPoul-Henning Kamp 	if (indent == NULL) {
575d518e539SPoul-Henning Kamp 		sbuf_printf(sb, " hd %u", dp->d_fwheads);
576d518e539SPoul-Henning Kamp 		sbuf_printf(sb, " sc %u", dp->d_fwsectors);
577d518e539SPoul-Henning Kamp 		return;
578d518e539SPoul-Henning Kamp 	}
5799e2ebaa0SPoul-Henning Kamp 	if (pp != NULL) {
5808f9628a1SPoul-Henning Kamp 		sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
5818f9628a1SPoul-Henning Kamp 		    indent, dp->d_fwheads);
5828f9628a1SPoul-Henning Kamp 		sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
5838f9628a1SPoul-Henning Kamp 		    indent, dp->d_fwsectors);
584cb03a502SRavi Pokala 
585cb03a502SRavi Pokala 		/*
586cb03a502SRavi Pokala 		 * "rotationrate" is a little complicated, because the value
587cb03a502SRavi Pokala 		 * returned by the drive might not be the RPM; 0 and 1 are
588cb03a502SRavi Pokala 		 * special cases, and there's also a valid range.
589cb03a502SRavi Pokala 		 */
590cb03a502SRavi Pokala 		sbuf_printf(sb, "%s<rotationrate>", indent);
591*17160457SAlexander Motin 		if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */
592*17160457SAlexander Motin 			sbuf_printf(sb, "unknown");	/* don't report RPM. */
593*17160457SAlexander Motin 		else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING)
594*17160457SAlexander Motin 			sbuf_printf(sb, "0");
595*17160457SAlexander Motin 		else if ((dp->d_rotation_rate >= DISK_RR_MIN) &&
596*17160457SAlexander Motin 		    (dp->d_rotation_rate <= DISK_RR_MAX))
597cb03a502SRavi Pokala 			sbuf_printf(sb, "%u", dp->d_rotation_rate);
598cb03a502SRavi Pokala 		else
599cb03a502SRavi Pokala 			sbuf_printf(sb, "invalid");
600cb03a502SRavi Pokala 		sbuf_printf(sb, "</rotationrate>\n");
601ccba7102SAlexander Motin 		if (dp->d_getattr != NULL) {
602ccba7102SAlexander Motin 			buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK);
603ccba7102SAlexander Motin 			bp = g_alloc_bio();
604ccba7102SAlexander Motin 			bp->bio_disk = dp;
605ccba7102SAlexander Motin 			bp->bio_attribute = "GEOM::ident";
606ccba7102SAlexander Motin 			bp->bio_length = DISK_IDENT_SIZE;
607ccba7102SAlexander Motin 			bp->bio_data = buf;
608ccba7102SAlexander Motin 			res = dp->d_getattr(bp);
6097ae1a87bSAlexander Motin 			sbuf_printf(sb, "%s<ident>", indent);
6107ae1a87bSAlexander Motin 			g_conf_printf_escaped(sb, "%s",
611ccba7102SAlexander Motin 			    res == 0 ? buf: dp->d_ident);
6127ae1a87bSAlexander Motin 			sbuf_printf(sb, "</ident>\n");
613ccba7102SAlexander Motin 			bp->bio_attribute = "GEOM::lunid";
614ccba7102SAlexander Motin 			bp->bio_length = DISK_IDENT_SIZE;
615ccba7102SAlexander Motin 			bp->bio_data = buf;
6167ae1a87bSAlexander Motin 			if (dp->d_getattr(bp) == 0) {
6177ae1a87bSAlexander Motin 				sbuf_printf(sb, "%s<lunid>", indent);
6187ae1a87bSAlexander Motin 				g_conf_printf_escaped(sb, "%s", buf);
6197ae1a87bSAlexander Motin 				sbuf_printf(sb, "</lunid>\n");
6207ae1a87bSAlexander Motin 			}
62140f27d7cSAlexander Motin 			bp->bio_attribute = "GEOM::lunname";
62240f27d7cSAlexander Motin 			bp->bio_length = DISK_IDENT_SIZE;
62340f27d7cSAlexander Motin 			bp->bio_data = buf;
6247ae1a87bSAlexander Motin 			if (dp->d_getattr(bp) == 0) {
6257ae1a87bSAlexander Motin 				sbuf_printf(sb, "%s<lunname>", indent);
6267ae1a87bSAlexander Motin 				g_conf_printf_escaped(sb, "%s", buf);
6277ae1a87bSAlexander Motin 				sbuf_printf(sb, "</lunname>\n");
6287ae1a87bSAlexander Motin 			}
629ccba7102SAlexander Motin 			g_destroy_bio(bp);
630ccba7102SAlexander Motin 			g_free(buf);
6317ae1a87bSAlexander Motin 		} else {
6327ae1a87bSAlexander Motin 			sbuf_printf(sb, "%s<ident>", indent);
6337ae1a87bSAlexander Motin 			g_conf_printf_escaped(sb, "%s", dp->d_ident);
6347ae1a87bSAlexander Motin 			sbuf_printf(sb, "</ident>\n");
6357ae1a87bSAlexander Motin 		}
6367ae1a87bSAlexander Motin 		sbuf_printf(sb, "%s<descr>", indent);
6377ae1a87bSAlexander Motin 		g_conf_printf_escaped(sb, "%s", dp->d_descr);
6387ae1a87bSAlexander Motin 		sbuf_printf(sb, "</descr>\n");
6398f9628a1SPoul-Henning Kamp 	}
6408f9628a1SPoul-Henning Kamp }
6418f9628a1SPoul-Henning Kamp 
6428f9628a1SPoul-Henning Kamp static void
6431af2d09bSEdward Tomasz Napierala g_disk_resize(void *ptr, int flag)
644bc97ce36SEdward Tomasz Napierala {
6451af2d09bSEdward Tomasz Napierala 	struct disk *dp;
646bc97ce36SEdward Tomasz Napierala 	struct g_geom *gp;
647bc97ce36SEdward Tomasz Napierala 	struct g_provider *pp;
648bc97ce36SEdward Tomasz Napierala 
6491af2d09bSEdward Tomasz Napierala 	if (flag == EV_CANCEL)
6501af2d09bSEdward Tomasz Napierala 		return;
6511af2d09bSEdward Tomasz Napierala 	g_topology_assert();
6521af2d09bSEdward Tomasz Napierala 
6531af2d09bSEdward Tomasz Napierala 	dp = ptr;
654bc97ce36SEdward Tomasz Napierala 	gp = dp->d_geom;
655bc97ce36SEdward Tomasz Napierala 
6561af2d09bSEdward Tomasz Napierala 	if (dp->d_destroyed || gp == NULL)
6571af2d09bSEdward Tomasz Napierala 		return;
6581af2d09bSEdward Tomasz Napierala 
659bc97ce36SEdward Tomasz Napierala 	LIST_FOREACH(pp, &gp->provider, provider) {
660bc97ce36SEdward Tomasz Napierala 		if (pp->sectorsize != 0 &&
661bc97ce36SEdward Tomasz Napierala 		    pp->sectorsize != dp->d_sectorsize)
662bc97ce36SEdward Tomasz Napierala 			g_wither_provider(pp, ENXIO);
663bc97ce36SEdward Tomasz Napierala 		else
664bc97ce36SEdward Tomasz Napierala 			g_resize_provider(pp, dp->d_mediasize);
665bc97ce36SEdward Tomasz Napierala 	}
666bc97ce36SEdward Tomasz Napierala }
667bc97ce36SEdward Tomasz Napierala 
668bc97ce36SEdward Tomasz Napierala static void
66943f0db6cSPoul-Henning Kamp g_disk_create(void *arg, int flag)
670dd84a43cSPoul-Henning Kamp {
671dd84a43cSPoul-Henning Kamp 	struct g_geom *gp;
672dd84a43cSPoul-Henning Kamp 	struct g_provider *pp;
673bb17c5f6SPoul-Henning Kamp 	struct disk *dp;
674c6d4ed3aSAlexander Motin 	struct g_disk_softc *sc;
675c6d4ed3aSAlexander Motin 	char tmpstr[80];
676dd84a43cSPoul-Henning Kamp 
67743f0db6cSPoul-Henning Kamp 	if (flag == EV_CANCEL)
67843f0db6cSPoul-Henning Kamp 		return;
6798523987bSPoul-Henning Kamp 	g_topology_assert();
680bb17c5f6SPoul-Henning Kamp 	dp = arg;
6811ff824e7SKenneth D. Merry 
682a02e196eSKenneth D. Merry 	mtx_pool_lock(mtxpool_sleep, dp);
6831ff824e7SKenneth D. Merry 	dp->d_init_level = DISK_INIT_START;
6841ff824e7SKenneth D. Merry 
6851ff824e7SKenneth D. Merry 	/*
6861ff824e7SKenneth D. Merry 	 * If the disk has already gone away, we can just stop here and
6871ff824e7SKenneth D. Merry 	 * call the user's callback to tell him we've cleaned things up.
6881ff824e7SKenneth D. Merry 	 */
6891ff824e7SKenneth D. Merry 	if (dp->d_goneflag != 0) {
690a02e196eSKenneth D. Merry 		mtx_pool_unlock(mtxpool_sleep, dp);
6911ff824e7SKenneth D. Merry 		if (dp->d_gone != NULL)
6921ff824e7SKenneth D. Merry 			dp->d_gone(dp);
6931ff824e7SKenneth D. Merry 		return;
6941ff824e7SKenneth D. Merry 	}
695a02e196eSKenneth D. Merry 	mtx_pool_unlock(mtxpool_sleep, dp);
6961ff824e7SKenneth D. Merry 
697c6d4ed3aSAlexander Motin 	sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
69840ea77a0SAlexander Motin 	mtx_init(&sc->start_mtx, "g_disk_start", NULL, MTX_DEF);
69930ba7471SAlexander Motin 	mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF);
700c6d4ed3aSAlexander Motin 	sc->dp = dp;
701bb17c5f6SPoul-Henning Kamp 	gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
702c6d4ed3aSAlexander Motin 	gp->softc = sc;
7038523987bSPoul-Henning Kamp 	pp = g_new_providerf(gp, "%s", gp->name);
70440ea77a0SAlexander Motin 	devstat_remove_entry(pp->stat);
70540ea77a0SAlexander Motin 	pp->stat = NULL;
70640ea77a0SAlexander Motin 	dp->d_devstat->id = pp;
707bb17c5f6SPoul-Henning Kamp 	pp->mediasize = dp->d_mediasize;
708bb17c5f6SPoul-Henning Kamp 	pp->sectorsize = dp->d_sectorsize;
7098a63edc3SPoul-Henning Kamp 	pp->stripeoffset = dp->d_stripeoffset;
7108a63edc3SPoul-Henning Kamp 	pp->stripesize = dp->d_stripesize;
711f8c19ba4SKonstantin Belousov 	if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0)
712f8c19ba4SKonstantin Belousov 		pp->flags |= G_PF_ACCEPT_UNMAPPED;
71340ea77a0SAlexander Motin 	if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0)
71440ea77a0SAlexander Motin 		pp->flags |= G_PF_DIRECT_SEND;
71540ea77a0SAlexander Motin 	pp->flags |= G_PF_DIRECT_RECEIVE;
7163d5500fcSPoul-Henning Kamp 	if (bootverbose)
7173d5500fcSPoul-Henning Kamp 		printf("GEOM: new disk %s\n", gp->name);
718c6d4ed3aSAlexander Motin 	sysctl_ctx_init(&sc->sysctl_ctx);
719c6d4ed3aSAlexander Motin 	snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name);
720c6d4ed3aSAlexander Motin 	sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
721c6d4ed3aSAlexander Motin 		SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name,
722c6d4ed3aSAlexander Motin 		CTLFLAG_RD, 0, tmpstr);
723c6d4ed3aSAlexander Motin 	if (sc->sysctl_tree != NULL) {
724c6d4ed3aSAlexander Motin 		SYSCTL_ADD_STRING(&sc->sysctl_ctx,
725c6d4ed3aSAlexander Motin 		    SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led",
726af3b2549SHans Petter Selasky 		    CTLFLAG_RWTUN, sc->led, sizeof(sc->led),
727c6d4ed3aSAlexander Motin 		    "LED name");
728c6d4ed3aSAlexander Motin 	}
729c6d4ed3aSAlexander Motin 	pp->private = sc;
730316aed03SPoul-Henning Kamp 	dp->d_geom = gp;
731316aed03SPoul-Henning Kamp 	g_error_provider(pp, 0);
7321ff824e7SKenneth D. Merry 
733a02e196eSKenneth D. Merry 	mtx_pool_lock(mtxpool_sleep, dp);
7341ff824e7SKenneth D. Merry 	dp->d_init_level = DISK_INIT_DONE;
7351ff824e7SKenneth D. Merry 
7361ff824e7SKenneth D. Merry 	/*
7371ff824e7SKenneth D. Merry 	 * If the disk has gone away at this stage, start the withering
7381ff824e7SKenneth D. Merry 	 * process for it.
7391ff824e7SKenneth D. Merry 	 */
7401ff824e7SKenneth D. Merry 	if (dp->d_goneflag != 0) {
741a02e196eSKenneth D. Merry 		mtx_pool_unlock(mtxpool_sleep, dp);
7421ff824e7SKenneth D. Merry 		g_wither_provider(pp, ENXIO);
7431ff824e7SKenneth D. Merry 		return;
7441ff824e7SKenneth D. Merry 	}
745a02e196eSKenneth D. Merry 	mtx_pool_unlock(mtxpool_sleep, dp);
7461ff824e7SKenneth D. Merry 
747dd84a43cSPoul-Henning Kamp }
7488523987bSPoul-Henning Kamp 
749c3fb2891SKenneth D. Merry /*
750c3fb2891SKenneth D. Merry  * We get this callback after all of the consumers have gone away, and just
751c3fb2891SKenneth D. Merry  * before the provider is freed.  If the disk driver provided a d_gone
752c3fb2891SKenneth D. Merry  * callback, let them know that it is okay to free resources -- they won't
753c3fb2891SKenneth D. Merry  * be getting any more accesses from GEOM.
754c3fb2891SKenneth D. Merry  */
755c3fb2891SKenneth D. Merry static void
756c3fb2891SKenneth D. Merry g_disk_providergone(struct g_provider *pp)
757c3fb2891SKenneth D. Merry {
758c3fb2891SKenneth D. Merry 	struct disk *dp;
759c3fb2891SKenneth D. Merry 	struct g_disk_softc *sc;
760c3fb2891SKenneth D. Merry 
76130ba7471SAlexander Motin 	sc = (struct g_disk_softc *)pp->private;
762c3fb2891SKenneth D. Merry 	dp = sc->dp;
76330ba7471SAlexander Motin 	if (dp != NULL && dp->d_gone != NULL)
764c3fb2891SKenneth D. Merry 		dp->d_gone(dp);
76530ba7471SAlexander Motin 	if (sc->sysctl_tree != NULL) {
76630ba7471SAlexander Motin 		sysctl_ctx_free(&sc->sysctl_ctx);
76730ba7471SAlexander Motin 		sc->sysctl_tree = NULL;
76830ba7471SAlexander Motin 	}
76930ba7471SAlexander Motin 	if (sc->led[0] != 0) {
77030ba7471SAlexander Motin 		led_set(sc->led, "0");
77130ba7471SAlexander Motin 		sc->led[0] = 0;
77230ba7471SAlexander Motin 	}
77330ba7471SAlexander Motin 	pp->private = NULL;
77430ba7471SAlexander Motin 	pp->geom->softc = NULL;
77530ba7471SAlexander Motin 	mtx_destroy(&sc->done_mtx);
77640ea77a0SAlexander Motin 	mtx_destroy(&sc->start_mtx);
77730ba7471SAlexander Motin 	g_free(sc);
778c3fb2891SKenneth D. Merry }
779c3fb2891SKenneth D. Merry 
780ce1ee789SPoul-Henning Kamp static void
781ce1ee789SPoul-Henning Kamp g_disk_destroy(void *ptr, int flag)
782ce1ee789SPoul-Henning Kamp {
7830b7ed341SPoul-Henning Kamp 	struct disk *dp;
784ce1ee789SPoul-Henning Kamp 	struct g_geom *gp;
785c6d4ed3aSAlexander Motin 	struct g_disk_softc *sc;
7868523987bSPoul-Henning Kamp 
787ce1ee789SPoul-Henning Kamp 	g_topology_assert();
7880b7ed341SPoul-Henning Kamp 	dp = ptr;
7890b7ed341SPoul-Henning Kamp 	gp = dp->d_geom;
790032bc81dSPoul-Henning Kamp 	if (gp != NULL) {
791c6d4ed3aSAlexander Motin 		sc = gp->softc;
79230ba7471SAlexander Motin 		if (sc != NULL)
79330ba7471SAlexander Motin 			sc->dp = NULL;
79430ba7471SAlexander Motin 		dp->d_geom = NULL;
795ce1ee789SPoul-Henning Kamp 		g_wither_geom(gp, ENXIO);
796032bc81dSPoul-Henning Kamp 	}
7971ff824e7SKenneth D. Merry 
7980b7ed341SPoul-Henning Kamp 	g_free(dp);
7990b7ed341SPoul-Henning Kamp }
8000b7ed341SPoul-Henning Kamp 
8015e16a486SPawel Jakub Dawidek /*
802e93f5e4dSPawel Jakub Dawidek  * We only allow printable characters in disk ident,
803e93f5e4dSPawel Jakub Dawidek  * the rest is converted to 'x<HH>'.
8045e16a486SPawel Jakub Dawidek  */
8055e16a486SPawel Jakub Dawidek static void
8065e16a486SPawel Jakub Dawidek g_disk_ident_adjust(char *ident, size_t size)
8075e16a486SPawel Jakub Dawidek {
808e93f5e4dSPawel Jakub Dawidek 	char *p, tmp[4], newid[DISK_IDENT_SIZE];
8095e16a486SPawel Jakub Dawidek 
810e93f5e4dSPawel Jakub Dawidek 	newid[0] = '\0';
811e93f5e4dSPawel Jakub Dawidek 	for (p = ident; *p != '\0'; p++) {
812e93f5e4dSPawel Jakub Dawidek 		if (isprint(*p)) {
813e93f5e4dSPawel Jakub Dawidek 			tmp[0] = *p;
814e93f5e4dSPawel Jakub Dawidek 			tmp[1] = '\0';
815e93f5e4dSPawel Jakub Dawidek 		} else {
816e93f5e4dSPawel Jakub Dawidek 			snprintf(tmp, sizeof(tmp), "x%02hhx",
817e93f5e4dSPawel Jakub Dawidek 			    *(unsigned char *)p);
8185e16a486SPawel Jakub Dawidek 		}
819e93f5e4dSPawel Jakub Dawidek 		if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
8205e16a486SPawel Jakub Dawidek 			break;
8215e16a486SPawel Jakub Dawidek 	}
8225e16a486SPawel Jakub Dawidek 	bzero(ident, size);
8235e16a486SPawel Jakub Dawidek 	strlcpy(ident, newid, size);
8245e16a486SPawel Jakub Dawidek }
8255e16a486SPawel Jakub Dawidek 
8260b7ed341SPoul-Henning Kamp struct disk *
82794954762SPawel Jakub Dawidek disk_alloc(void)
8280b7ed341SPoul-Henning Kamp {
8290b7ed341SPoul-Henning Kamp 
83094954762SPawel Jakub Dawidek 	return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO));
831ce1ee789SPoul-Henning Kamp }
8328523987bSPoul-Henning Kamp 
83398bbd7aaSPoul-Henning Kamp void
8340b7ed341SPoul-Henning Kamp disk_create(struct disk *dp, int version)
8358523987bSPoul-Henning Kamp {
83637f0f0a7SPawel Jakub Dawidek 
8378383a92eSSteven Hartland 	if (version != DISK_VERSION) {
8380b7ed341SPoul-Henning Kamp 		printf("WARNING: Attempt to add disk %s%d %s",
8390b7ed341SPoul-Henning Kamp 		    dp->d_name, dp->d_unit,
8400b7ed341SPoul-Henning Kamp 		    " using incompatible ABI version of disk(9)\n");
8410b7ed341SPoul-Henning Kamp 		printf("WARNING: Ignoring disk %s%d\n",
8420b7ed341SPoul-Henning Kamp 		    dp->d_name, dp->d_unit);
8430b7ed341SPoul-Henning Kamp 		return;
8440b7ed341SPoul-Henning Kamp 	}
845d6d78db5SJohn Baldwin 	if (dp->d_flags & DISKFLAG_RESERVED) {
846d6d78db5SJohn Baldwin 		printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n",
847d6d78db5SJohn Baldwin 		    dp->d_name, dp->d_unit);
848d6d78db5SJohn Baldwin 		printf("WARNING: Ignoring disk %s%d\n",
849d6d78db5SJohn Baldwin 		    dp->d_name, dp->d_unit);
850d6d78db5SJohn Baldwin 		return;
851d6d78db5SJohn Baldwin 	}
85231a1093fSPoul-Henning Kamp 	KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
85331a1093fSPoul-Henning Kamp 	KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
85431a1093fSPoul-Henning Kamp 	KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
855237d2765SPoul-Henning Kamp 	KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
856eb98005fSPoul-Henning Kamp 	if (dp->d_devstat == NULL)
85709f95804SPoul-Henning Kamp 		dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
85860794e04SPoul-Henning Kamp 		    dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
85960794e04SPoul-Henning Kamp 		    DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
860316aed03SPoul-Henning Kamp 	dp->d_geom = NULL;
8611ff824e7SKenneth D. Merry 
8621ff824e7SKenneth D. Merry 	dp->d_init_level = DISK_INIT_NONE;
8631ff824e7SKenneth D. Merry 
8645e16a486SPawel Jakub Dawidek 	g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
8658cd1535aSPoul-Henning Kamp 	g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL);
866dd84a43cSPoul-Henning Kamp }
867dd84a43cSPoul-Henning Kamp 
868dd84a43cSPoul-Henning Kamp void
869b82ff758SPoul-Henning Kamp disk_destroy(struct disk *dp)
870dd84a43cSPoul-Henning Kamp {
871dd84a43cSPoul-Henning Kamp 
872316aed03SPoul-Henning Kamp 	g_cancel_event(dp);
8730b7ed341SPoul-Henning Kamp 	dp->d_destroyed = 1;
87452c583feSPoul-Henning Kamp 	if (dp->d_devstat != NULL)
87552c583feSPoul-Henning Kamp 		devstat_remove_entry(dp->d_devstat);
87611e9a679SPoul-Henning Kamp 	g_post_event(g_disk_destroy, dp, M_WAITOK, NULL);
877dd84a43cSPoul-Henning Kamp }
878dd84a43cSPoul-Henning Kamp 
879a7e69e8bSJohn Polstra void
880a7e69e8bSJohn Polstra disk_gone(struct disk *dp)
881a7e69e8bSJohn Polstra {
882a7e69e8bSJohn Polstra 	struct g_geom *gp;
883a7e69e8bSJohn Polstra 	struct g_provider *pp;
884a7e69e8bSJohn Polstra 
885a02e196eSKenneth D. Merry 	mtx_pool_lock(mtxpool_sleep, dp);
8861ff824e7SKenneth D. Merry 	dp->d_goneflag = 1;
8871ff824e7SKenneth D. Merry 
8881ff824e7SKenneth D. Merry 	/*
8891ff824e7SKenneth D. Merry 	 * If we're still in the process of creating this disk (the
8901ff824e7SKenneth D. Merry 	 * g_disk_create() function is still queued, or is in
8911ff824e7SKenneth D. Merry 	 * progress), the init level will not yet be DISK_INIT_DONE.
8921ff824e7SKenneth D. Merry 	 *
8931ff824e7SKenneth D. Merry 	 * If that is the case, g_disk_create() will see d_goneflag
8941ff824e7SKenneth D. Merry 	 * and take care of cleaning things up.
8951ff824e7SKenneth D. Merry 	 *
8961ff824e7SKenneth D. Merry 	 * If the disk has already been created, we default to
8971ff824e7SKenneth D. Merry 	 * withering the provider as usual below.
8981ff824e7SKenneth D. Merry 	 *
8991ff824e7SKenneth D. Merry 	 * If the caller has not set a d_gone() callback, he will
9001ff824e7SKenneth D. Merry 	 * not be any worse off by returning here, because the geom
9011ff824e7SKenneth D. Merry 	 * has not been fully setup in any case.
9021ff824e7SKenneth D. Merry 	 */
9031ff824e7SKenneth D. Merry 	if (dp->d_init_level < DISK_INIT_DONE) {
904a02e196eSKenneth D. Merry 		mtx_pool_unlock(mtxpool_sleep, dp);
9051ff824e7SKenneth D. Merry 		return;
9061ff824e7SKenneth D. Merry 	}
907a02e196eSKenneth D. Merry 	mtx_pool_unlock(mtxpool_sleep, dp);
9081ff824e7SKenneth D. Merry 
909a7e69e8bSJohn Polstra 	gp = dp->d_geom;
910171f6b3aSPawel Jakub Dawidek 	if (gp != NULL) {
9115d8a6a10SPawel Jakub Dawidek 		pp = LIST_FIRST(&gp->provider);
9125d8a6a10SPawel Jakub Dawidek 		if (pp != NULL) {
9135d8a6a10SPawel Jakub Dawidek 			KASSERT(LIST_NEXT(pp, provider) == NULL,
9145d8a6a10SPawel Jakub Dawidek 			    ("geom %p has more than one provider", gp));
915d99c1559SMarcel Moolenaar 			g_wither_provider(pp, ENXIO);
916a7e69e8bSJohn Polstra 		}
9175d8a6a10SPawel Jakub Dawidek 	}
918171f6b3aSPawel Jakub Dawidek }
919a7e69e8bSJohn Polstra 
920416494d7SJustin T. Gibbs void
921416494d7SJustin T. Gibbs disk_attr_changed(struct disk *dp, const char *attr, int flag)
922416494d7SJustin T. Gibbs {
923416494d7SJustin T. Gibbs 	struct g_geom *gp;
924416494d7SJustin T. Gibbs 	struct g_provider *pp;
92542f42c99SAlan Somers 	char devnamebuf[128];
926416494d7SJustin T. Gibbs 
927416494d7SJustin T. Gibbs 	gp = dp->d_geom;
928416494d7SJustin T. Gibbs 	if (gp != NULL)
929416494d7SJustin T. Gibbs 		LIST_FOREACH(pp, &gp->provider, provider)
930416494d7SJustin T. Gibbs 			(void)g_attr_changed(pp, attr, flag);
9311c2c346fSAlan Somers 	snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name,
9321c2c346fSAlan Somers 	    dp->d_unit);
93342f42c99SAlan Somers 	devctl_notify("GEOM", "disk", attr, devnamebuf);
934416494d7SJustin T. Gibbs }
935416494d7SJustin T. Gibbs 
936bc97ce36SEdward Tomasz Napierala void
9373631c638SAlexander Motin disk_media_changed(struct disk *dp, int flag)
9383631c638SAlexander Motin {
9393631c638SAlexander Motin 	struct g_geom *gp;
9403631c638SAlexander Motin 	struct g_provider *pp;
9413631c638SAlexander Motin 
9423631c638SAlexander Motin 	gp = dp->d_geom;
9433631c638SAlexander Motin 	if (gp != NULL) {
9440fb832fdSAlexander Motin 		pp = LIST_FIRST(&gp->provider);
9450fb832fdSAlexander Motin 		if (pp != NULL) {
9460fb832fdSAlexander Motin 			KASSERT(LIST_NEXT(pp, provider) == NULL,
9470fb832fdSAlexander Motin 			    ("geom %p has more than one provider", gp));
9483631c638SAlexander Motin 			g_media_changed(pp, flag);
9493631c638SAlexander Motin 		}
9503631c638SAlexander Motin 	}
9510fb832fdSAlexander Motin }
9523631c638SAlexander Motin 
9533631c638SAlexander Motin void
9543631c638SAlexander Motin disk_media_gone(struct disk *dp, int flag)
9553631c638SAlexander Motin {
9563631c638SAlexander Motin 	struct g_geom *gp;
9573631c638SAlexander Motin 	struct g_provider *pp;
9583631c638SAlexander Motin 
9593631c638SAlexander Motin 	gp = dp->d_geom;
9603631c638SAlexander Motin 	if (gp != NULL) {
9610fb832fdSAlexander Motin 		pp = LIST_FIRST(&gp->provider);
9620fb832fdSAlexander Motin 		if (pp != NULL) {
9630fb832fdSAlexander Motin 			KASSERT(LIST_NEXT(pp, provider) == NULL,
9640fb832fdSAlexander Motin 			    ("geom %p has more than one provider", gp));
9653631c638SAlexander Motin 			g_media_gone(pp, flag);
9663631c638SAlexander Motin 		}
9673631c638SAlexander Motin 	}
9680fb832fdSAlexander Motin }
9693631c638SAlexander Motin 
9701af2d09bSEdward Tomasz Napierala int
9711af2d09bSEdward Tomasz Napierala disk_resize(struct disk *dp, int flag)
972bc97ce36SEdward Tomasz Napierala {
973bc97ce36SEdward Tomasz Napierala 
9741af2d09bSEdward Tomasz Napierala 	if (dp->d_destroyed || dp->d_geom == NULL)
9751af2d09bSEdward Tomasz Napierala 		return (0);
976bc97ce36SEdward Tomasz Napierala 
9771af2d09bSEdward Tomasz Napierala 	return (g_post_event(g_disk_resize, dp, flag, NULL));
978bc97ce36SEdward Tomasz Napierala }
979bc97ce36SEdward Tomasz Napierala 
9800cc3011dSPoul-Henning Kamp static void
981afcbcfaeSPoul-Henning Kamp g_kern_disks(void *p, int flag __unused)
9820cc3011dSPoul-Henning Kamp {
9830cc3011dSPoul-Henning Kamp 	struct sbuf *sb;
9840cc3011dSPoul-Henning Kamp 	struct g_geom *gp;
9850cc3011dSPoul-Henning Kamp 	char *sp;
9860cc3011dSPoul-Henning Kamp 
9870cc3011dSPoul-Henning Kamp 	sb = p;
9880cc3011dSPoul-Henning Kamp 	sp = "";
9890cc3011dSPoul-Henning Kamp 	g_topology_assert();
9900cc3011dSPoul-Henning Kamp 	LIST_FOREACH(gp, &g_disk_class.geom, geom) {
9910cc3011dSPoul-Henning Kamp 		sbuf_printf(sb, "%s%s", sp, gp->name);
9920cc3011dSPoul-Henning Kamp 		sp = " ";
9930cc3011dSPoul-Henning Kamp 	}
9940cc3011dSPoul-Henning Kamp 	sbuf_finish(sb);
9950cc3011dSPoul-Henning Kamp }
9960cc3011dSPoul-Henning Kamp 
9970cc3011dSPoul-Henning Kamp static int
9980cc3011dSPoul-Henning Kamp sysctl_disks(SYSCTL_HANDLER_ARGS)
9990cc3011dSPoul-Henning Kamp {
10000cc3011dSPoul-Henning Kamp 	int error;
10010cc3011dSPoul-Henning Kamp 	struct sbuf *sb;
10020cc3011dSPoul-Henning Kamp 
10032616144eSDag-Erling Smørgrav 	sb = sbuf_new_auto();
10040a9c130cSPoul-Henning Kamp 	g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
1005aed99af2SPoul-Henning Kamp 	error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
10060cc3011dSPoul-Henning Kamp 	sbuf_delete(sb);
10070cc3011dSPoul-Henning Kamp 	return error;
10080cc3011dSPoul-Henning Kamp }
10090cc3011dSPoul-Henning Kamp 
101073d6f851SMatthew D Fleming SYSCTL_PROC(_kern, OID_AUTO, disks,
101173d6f851SMatthew D Fleming     CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
10120cc3011dSPoul-Henning Kamp     sysctl_disks, "A", "names of available disks");
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