geom_disk.c revision 97317
1238438Sdteske/*- 2238438Sdteske * Copyright (c) 2002 Poul-Henning Kamp 3249746Sdteske * Copyright (c) 2002 Networks Associates Technology, Inc. 4252980Sdteske * All rights reserved. 5238438Sdteske * 6238438Sdteske * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7238438Sdteske * and NAI Labs, the Security Research Division of Network Associates, Inc. 8238438Sdteske * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9238438Sdteske * DARPA CHATS research program. 10238438Sdteske * 11238438Sdteske * Redistribution and use in source and binary forms, with or without 12238438Sdteske * modification, are permitted provided that the following conditions 13238438Sdteske * are met: 14238438Sdteske * 1. Redistributions of source code must retain the above copyright 15238438Sdteske * notice, this list of conditions and the following disclaimer. 16238438Sdteske * 2. Redistributions in binary form must reproduce the above copyright 17238438Sdteske * notice, this list of conditions and the following disclaimer in the 18238438Sdteske * documentation and/or other materials provided with the distribution. 19238438Sdteske * 3. The names of the authors may not be used to endorse or promote 20238438Sdteske * products derived from this software without specific prior written 21238438Sdteske * permission. 22238438Sdteske * 23238438Sdteske * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24238438Sdteske * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25238438Sdteske * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26238438Sdteske * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27238438Sdteske * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28238438Sdteske * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29238438Sdteske * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30238438Sdteske * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31240684Sdteske * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32240684Sdteske * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33244675Sdteske * SUCH DAMAGE. 34240684Sdteske * 35240684Sdteske * $FreeBSD: head/sys/geom/geom_disk.c 97317 2002-05-26 17:35:14Z phk $ 36240684Sdteske */ 37238438Sdteske 38240684Sdteske#include "opt_geom.h" 39238438Sdteske 40238438Sdteske#include <sys/param.h> 41242107Sdteske#include <sys/systm.h> 42242107Sdteske#include <sys/kernel.h> 43243112Sdteske#include <sys/sysctl.h> 44238438Sdteske#include <sys/bio.h> 45238438Sdteske#include <sys/conf.h> 46238438Sdteske#include <sys/disk.h> 47238438Sdteske#include <sys/malloc.h> 48238438Sdteske#include <sys/sysctl.h> 49238438Sdteske#include <machine/md_var.h> 50238438Sdteske#include <sys/ctype.h> 51238438Sdteske 52238438Sdteske 53238438Sdteske#include <sys/lock.h> 54238438Sdteske#include <sys/mutex.h> 55251264Sdteske#include <geom/geom.h> 56238438Sdteske 57238438Sdteskestatic g_access_t g_disk_access; 58238438Sdteske 59238438Sdteskestruct g_class g_disk_class = { 60238438Sdteske "DISK", 61251264Sdteske NULL, 62251264Sdteske NULL, 63238438Sdteske G_CLASS_INITSTUFF 64251190Sdteske}; 65251190Sdteske 66251190Sdteskestatic int 67251190Sdteskeg_disk_access(struct g_provider *pp, int r, int w, int e) 68251190Sdteske{ 69251190Sdteske struct disk *dp; 70251190Sdteske dev_t dev; 71238438Sdteske int error; 72249751Sdteske 73249751Sdteske g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 74249751Sdteske pp->name, r, w, e); 75249751Sdteske g_topology_assert(); 76249751Sdteske r += pp->acr; 77249751Sdteske w += pp->acw; 78249751Sdteske e += pp->ace; 79249751Sdteske dp = pp->geom->softc; 80249751Sdteske dev = dp->d_dev; 81249751Sdteske if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 82249751Sdteske mtx_lock(&Giant); 83251236Sdteske error = devsw(dev)->d_open(dev, 3, 0, NULL); 84251236Sdteske if (error != 0) 85249751Sdteske printf("Opened disk %s -> %d\n", pp->name, error); 86238438Sdteske mtx_unlock(&Giant); 87238438Sdteske } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 88238438Sdteske mtx_lock(&Giant); 89238438Sdteske error = devsw(dev)->d_close(dev, 3, 0, NULL); 90241899Sdteske if (error != 0) 91245401Sdteske printf("Closed disk %s -> %d\n", pp->name, error); 92242096Sdteske mtx_unlock(&Giant); 93249751Sdteske } else { 94251190Sdteske error = 0; 95251190Sdteske } 96238438Sdteske pp->mediasize = 97240768Sdteske dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit; 98240768Sdteske return (error); 99240768Sdteske} 100251236Sdteske 101240768Sdteskestatic void 102238438Sdteskeg_disk_kerneldump(struct bio *bp, struct disk *dp) 103238438Sdteske{ 104238438Sdteske int error; 105238438Sdteske struct g_kerneldump *gkd; 106238438Sdteske struct dumperinfo di; 107238438Sdteske 108238438Sdteske gkd = (struct g_kerneldump*)bp->bio_data; 109238438Sdteske printf("Kerneldump off=%lld len=%lld\n", gkd->offset, gkd->length); 110238438Sdteske di.dumper = (dumper_t *)dp->d_devsw->d_dump; 111238438Sdteske di.priv = dp->d_dev; 112250633Sdteske di.blocksize = dp->d_label.d_secsize; 113238438Sdteske di.mediaoffset = gkd->offset; 114252178Sdteske di.mediasize = gkd->length; 115238438Sdteske error = set_dumper(&di); 116238438Sdteske g_io_fail(bp, error); 117238438Sdteske} 118238438Sdteske 119238438Sdteskestatic void 120238438Sdteskeg_disk_done(struct bio *bp) 121238438Sdteske{ 122238438Sdteske 123238438Sdteske mtx_unlock(&Giant); 124238438Sdteske bp->bio_completed = bp->bio_length - bp->bio_resid; 125238438Sdteske g_std_done(bp); 126238438Sdteske mtx_lock(&Giant); 127251933Sdteske} 128238438Sdteske 129241899Sdteskestatic void 130241899Sdteskeg_disk_start(struct bio *bp) 131241899Sdteske{ 132251236Sdteske struct bio *bp2; 133238438Sdteske dev_t dev; 134241899Sdteske struct disk *dp; 135241899Sdteske struct g_ioctl *gio; 136242107Sdteske int error; 137241899Sdteske 138241899Sdteske dp = bp->bio_to->geom->softc; 139241899Sdteske dev = dp->d_dev; 140241899Sdteske error = 0; 141238438Sdteske switch(bp->bio_cmd) { 142241899Sdteske case BIO_READ: 143241899Sdteske case BIO_WRITE: 144241899Sdteske bp2 = g_clone_bio(bp); 145238438Sdteske bp2->bio_done = g_disk_done; 146238438Sdteske bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT; 147238438Sdteske bp2->bio_pblkno = bp2->bio_blkno; 148238438Sdteske bp2->bio_bcount = bp2->bio_length; 149238438Sdteske bp2->bio_dev = dev; 150238438Sdteske mtx_lock(&Giant); 151238438Sdteske devsw(dev)->d_strategy(bp2); 152238438Sdteske mtx_unlock(&Giant); 153238438Sdteske break; 154238438Sdteske case BIO_GETATTR: 155238438Sdteske if (g_haveattr_int(bp, "GEOM::sectorsize", 156238438Sdteske dp->d_label.d_secsize)) 157238438Sdteske break; 158238438Sdteske else if (g_haveattr_int(bp, "GEOM::fwsectors", 159238438Sdteske dp->d_label.d_nsectors)) 160238438Sdteske break; 161252017Sdteske else if (g_haveattr_int(bp, "GEOM::fwheads", 162252017Sdteske dp->d_label.d_ntracks)) 163238438Sdteske break; 164238438Sdteske else if (g_haveattr_off_t(bp, "GEOM::mediasize", 165238438Sdteske dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit)) 166238438Sdteske break; 167238438Sdteske else if (g_haveattr_off_t(bp, "GEOM::frontstuff", 0)) 168238438Sdteske break; 169238438Sdteske else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 170 g_disk_kerneldump(bp, dp); 171 else if (!strcmp(bp->bio_attribute, "GEOM::ioctl") && 172 bp->bio_length == sizeof *gio) { 173 gio = (struct g_ioctl *)bp->bio_data; 174 mtx_lock(&Giant); 175 error = devsw(dev)->d_ioctl(dev, gio->cmd, 176 gio->data, gio->fflag, gio->td); 177 mtx_unlock(&Giant); 178 } else 179 error = ENOIOCTL; 180 break; 181 default: 182 error = EOPNOTSUPP; 183 break; 184 } 185 if (error) { 186 bp->bio_error = error; 187 g_io_deliver(bp); 188 } 189 return; 190} 191 192dev_t 193disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto) 194{ 195 static int once; 196 struct g_geom *gp; 197 struct g_provider *pp; 198 dev_t dev; 199 200 mtx_unlock(&Giant); 201 if (!once) { 202 g_add_class(&g_disk_class); 203 once++; 204 } 205 dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO); 206 dp->d_dev = dev; 207 dp->d_devsw = cdevsw; 208 dev->si_devsw = cdevsw; 209 dev->si_disk = dp; 210 dev->si_udev = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART); 211 g_topology_lock(); 212 gp = g_new_geomf(&g_disk_class, "%s%d", cdevsw->d_name, unit); 213 strcpy(dev->si_name, gp->name); 214 gp->start = g_disk_start; 215 gp->access = g_disk_access; 216 gp->softc = dp; 217 dp->d_softc = gp; 218 pp = g_new_providerf(gp, "%s", gp->name); 219 g_error_provider(pp, 0); 220 g_topology_unlock(); 221 mtx_lock(&Giant); 222 return (dev); 223} 224 225void disk_dev_synth(dev_t dev); 226 227void 228disk_dev_synth(dev_t dev) 229{ 230 231 return; 232} 233 234void 235disk_destroy(dev_t dev) 236{ 237 struct disk *dp; 238 struct g_geom *gp; 239 240 dp = dev->si_disk; 241 gp = dp->d_softc; 242 g_free(dev); 243 gp->flags |= G_GEOM_WITHER; 244 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO); 245} 246 247void 248disk_invalidate (struct disk *disk) 249{ 250} 251 252 253SYSCTL_INT(_debug_sizeof, OID_AUTO, disklabel, CTLFLAG_RD, 254 0, sizeof(struct disklabel), "sizeof(struct disklabel)"); 255 256SYSCTL_INT(_debug_sizeof, OID_AUTO, diskslices, CTLFLAG_RD, 257 0, sizeof(struct diskslices), "sizeof(struct diskslices)"); 258 259SYSCTL_INT(_debug_sizeof, OID_AUTO, disk, CTLFLAG_RD, 260 0, sizeof(struct disk), "sizeof(struct disk)"); 261