1/*- 2 * Copyright (c) 2002 Poul-Henning Kamp 3 * Copyright (c) 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7 * and NAI Labs, the Security Research Division of Network Associates, Inc. 8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9 * DARPA CHATS research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The names of the authors may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include <sys/cdefs.h>
| 1/*- 2 * Copyright (c) 2002 Poul-Henning Kamp 3 * Copyright (c) 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7 * and NAI Labs, the Security Research Division of Network Associates, Inc. 8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9 * DARPA CHATS research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The names of the authors may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include <sys/cdefs.h>
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37__FBSDID("$FreeBSD: head/sys/geom/geom_disk.c 217915 2011-01-26 22:48:09Z mdf $");
| 37__FBSDID("$FreeBSD: head/sys/geom/geom_disk.c 219056 2011-02-26 14:58:54Z nwhitehorn $");
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38 39#include "opt_geom.h" 40 41#include <sys/param.h> 42#include <sys/systm.h> 43#include <sys/kernel.h> 44#include <sys/sysctl.h> 45#include <sys/bio.h> 46#include <sys/conf.h> 47#include <sys/ctype.h> 48#include <sys/fcntl.h> 49#include <sys/malloc.h> 50#include <sys/sysctl.h> 51#include <sys/devicestat.h> 52#include <machine/md_var.h> 53 54#include <sys/lock.h> 55#include <sys/mutex.h> 56#include <geom/geom.h> 57#include <geom/geom_disk.h> 58#include <geom/geom_int.h> 59 60static struct mtx g_disk_done_mtx; 61 62static g_access_t g_disk_access; 63static g_init_t g_disk_init; 64static g_fini_t g_disk_fini; 65static g_start_t g_disk_start; 66static g_ioctl_t g_disk_ioctl; 67static g_dumpconf_t g_disk_dumpconf; 68 69static struct g_class g_disk_class = { 70 .name = "DISK", 71 .version = G_VERSION, 72 .init = g_disk_init, 73 .fini = g_disk_fini, 74 .start = g_disk_start, 75 .access = g_disk_access, 76 .ioctl = g_disk_ioctl, 77 .dumpconf = g_disk_dumpconf, 78}; 79 80static void 81g_disk_init(struct g_class *mp __unused) 82{ 83 84 mtx_init(&g_disk_done_mtx, "g_disk_done", NULL, MTX_DEF); 85} 86 87static void 88g_disk_fini(struct g_class *mp __unused) 89{ 90 91 mtx_destroy(&g_disk_done_mtx); 92} 93 94DECLARE_GEOM_CLASS(g_disk_class, g_disk); 95 96static void __inline 97g_disk_lock_giant(struct disk *dp) 98{ 99 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 100 mtx_lock(&Giant); 101} 102 103static void __inline 104g_disk_unlock_giant(struct disk *dp) 105{ 106 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 107 mtx_unlock(&Giant); 108} 109 110static int 111g_disk_access(struct g_provider *pp, int r, int w, int e) 112{ 113 struct disk *dp; 114 int error; 115 116 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 117 pp->name, r, w, e); 118 g_topology_assert(); 119 dp = pp->geom->softc; 120 if (dp == NULL || dp->d_destroyed) { 121 /* 122 * Allow decreasing access count even if disk is not 123 * avaliable anymore. 124 */ 125 if (r <= 0 && w <= 0 && e <= 0) 126 return (0); 127 return (ENXIO); 128 } 129 r += pp->acr; 130 w += pp->acw; 131 e += pp->ace; 132 error = 0; 133 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 134 if (dp->d_open != NULL) { 135 g_disk_lock_giant(dp); 136 error = dp->d_open(dp); 137 if (bootverbose && error != 0) 138 printf("Opened disk %s -> %d\n", 139 pp->name, error); 140 g_disk_unlock_giant(dp); 141 } 142 pp->mediasize = dp->d_mediasize; 143 pp->sectorsize = dp->d_sectorsize; 144 dp->d_flags |= DISKFLAG_OPEN; 145 if (dp->d_maxsize == 0) { 146 printf("WARNING: Disk drive %s%d has no d_maxsize\n", 147 dp->d_name, dp->d_unit); 148 dp->d_maxsize = DFLTPHYS; 149 } 150 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 151 if (dp->d_close != NULL) { 152 g_disk_lock_giant(dp); 153 error = dp->d_close(dp); 154 if (error != 0) 155 printf("Closed disk %s -> %d\n", 156 pp->name, error); 157 g_disk_unlock_giant(dp); 158 } 159 dp->d_flags &= ~DISKFLAG_OPEN; 160 } 161 return (error); 162} 163 164static void 165g_disk_kerneldump(struct bio *bp, struct disk *dp) 166{ 167 int error; 168 struct g_kerneldump *gkd; 169 struct dumperinfo di; 170 struct g_geom *gp; 171 172 gkd = (struct g_kerneldump*)bp->bio_data; 173 gp = bp->bio_to->geom; 174 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)", 175 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 176 if (dp->d_dump == NULL) { 177 g_io_deliver(bp, ENODEV); 178 return; 179 } 180 di.dumper = dp->d_dump; 181 di.priv = dp; 182 di.blocksize = dp->d_sectorsize; 183 di.maxiosize = dp->d_maxsize; 184 di.mediaoffset = gkd->offset; 185 if ((gkd->offset + gkd->length) > dp->d_mediasize) 186 gkd->length = dp->d_mediasize - gkd->offset; 187 di.mediasize = gkd->length; 188 error = set_dumper(&di); 189 g_io_deliver(bp, error); 190} 191 192static void 193g_disk_done(struct bio *bp) 194{ 195 struct bio *bp2; 196 struct disk *dp; 197 198 /* See "notes" for why we need a mutex here */ 199 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 200 mtx_lock(&g_disk_done_mtx); 201 bp->bio_completed = bp->bio_length - bp->bio_resid; 202 203 bp2 = bp->bio_parent; 204 if (bp2->bio_error == 0) 205 bp2->bio_error = bp->bio_error; 206 bp2->bio_completed += bp->bio_completed; 207 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) && 208 (dp = bp2->bio_to->geom->softc)) { 209 devstat_end_transaction_bio(dp->d_devstat, bp); 210 } 211 g_destroy_bio(bp); 212 bp2->bio_inbed++; 213 if (bp2->bio_children == bp2->bio_inbed) { 214 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 215 g_io_deliver(bp2, bp2->bio_error); 216 } 217 mtx_unlock(&g_disk_done_mtx); 218} 219 220static int 221g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 222{ 223 struct g_geom *gp; 224 struct disk *dp; 225 int error; 226 227 gp = pp->geom; 228 dp = gp->softc; 229 230 if (dp->d_ioctl == NULL) 231 return (ENOIOCTL); 232 g_disk_lock_giant(dp); 233 error = dp->d_ioctl(dp, cmd, data, fflag, td); 234 g_disk_unlock_giant(dp); 235 return(error); 236} 237 238static void 239g_disk_start(struct bio *bp) 240{ 241 struct bio *bp2, *bp3; 242 struct disk *dp; 243 int error; 244 off_t off; 245 246 dp = bp->bio_to->geom->softc; 247 if (dp == NULL || dp->d_destroyed) { 248 g_io_deliver(bp, ENXIO); 249 return; 250 } 251 error = EJUSTRETURN; 252 switch(bp->bio_cmd) { 253 case BIO_DELETE: 254 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 255 error = 0; 256 break; 257 } 258 /* fall-through */ 259 case BIO_READ: 260 case BIO_WRITE: 261 off = 0; 262 bp3 = NULL; 263 bp2 = g_clone_bio(bp); 264 if (bp2 == NULL) { 265 error = ENOMEM; 266 break; 267 } 268 do { 269 bp2->bio_offset += off; 270 bp2->bio_length -= off; 271 bp2->bio_data += off; 272 if (bp2->bio_length > dp->d_maxsize) { 273 /* 274 * XXX: If we have a stripesize we should really 275 * use it here. 276 */ 277 bp2->bio_length = dp->d_maxsize; 278 off += dp->d_maxsize; 279 /* 280 * To avoid a race, we need to grab the next bio 281 * before we schedule this one. See "notes". 282 */ 283 bp3 = g_clone_bio(bp); 284 if (bp3 == NULL) 285 bp->bio_error = ENOMEM; 286 } 287 bp2->bio_done = g_disk_done; 288 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 289 bp2->bio_bcount = bp2->bio_length; 290 bp2->bio_disk = dp; 291 devstat_start_transaction_bio(dp->d_devstat, bp2); 292 g_disk_lock_giant(dp); 293 dp->d_strategy(bp2); 294 g_disk_unlock_giant(dp); 295 bp2 = bp3; 296 bp3 = NULL; 297 } while (bp2 != NULL); 298 break; 299 case BIO_GETATTR: 300 if (g_handleattr_int(bp, "GEOM::candelete", 301 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 302 break; 303 else if (g_handleattr_int(bp, "GEOM::fwsectors", 304 dp->d_fwsectors)) 305 break; 306 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 307 break; 308 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 309 break; 310 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 311 break; 312 else if (g_handleattr(bp, "GEOM::hba_vendor", 313 &dp->d_hba_vendor, 2)) 314 break; 315 else if (g_handleattr(bp, "GEOM::hba_device", 316 &dp->d_hba_device, 2)) 317 break; 318 else if (g_handleattr(bp, "GEOM::hba_subvendor", 319 &dp->d_hba_subvendor, 2)) 320 break; 321 else if (g_handleattr(bp, "GEOM::hba_subdevice", 322 &dp->d_hba_subdevice, 2)) 323 break; 324 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 325 g_disk_kerneldump(bp, dp); 326 else 327 error = ENOIOCTL; 328 break; 329 case BIO_FLUSH: 330 g_trace(G_T_TOPOLOGY, "g_disk_flushcache(%s)", 331 bp->bio_to->name); 332 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 333 g_io_deliver(bp, ENODEV); 334 return; 335 } 336 bp2 = g_clone_bio(bp); 337 if (bp2 == NULL) { 338 g_io_deliver(bp, ENOMEM); 339 return; 340 } 341 bp2->bio_done = g_disk_done; 342 bp2->bio_disk = dp; 343 g_disk_lock_giant(dp); 344 dp->d_strategy(bp2); 345 g_disk_unlock_giant(dp); 346 break; 347 default: 348 error = EOPNOTSUPP; 349 break; 350 } 351 if (error != EJUSTRETURN) 352 g_io_deliver(bp, error); 353 return; 354} 355 356static void 357g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 358{ 359 struct disk *dp; 360 361 dp = gp->softc; 362 if (dp == NULL) 363 return; 364 if (indent == NULL) { 365 sbuf_printf(sb, " hd %u", dp->d_fwheads); 366 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 367 return; 368 } 369 if (pp != NULL) { 370 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 371 indent, dp->d_fwheads); 372 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 373 indent, dp->d_fwsectors);
| 38 39#include "opt_geom.h" 40 41#include <sys/param.h> 42#include <sys/systm.h> 43#include <sys/kernel.h> 44#include <sys/sysctl.h> 45#include <sys/bio.h> 46#include <sys/conf.h> 47#include <sys/ctype.h> 48#include <sys/fcntl.h> 49#include <sys/malloc.h> 50#include <sys/sysctl.h> 51#include <sys/devicestat.h> 52#include <machine/md_var.h> 53 54#include <sys/lock.h> 55#include <sys/mutex.h> 56#include <geom/geom.h> 57#include <geom/geom_disk.h> 58#include <geom/geom_int.h> 59 60static struct mtx g_disk_done_mtx; 61 62static g_access_t g_disk_access; 63static g_init_t g_disk_init; 64static g_fini_t g_disk_fini; 65static g_start_t g_disk_start; 66static g_ioctl_t g_disk_ioctl; 67static g_dumpconf_t g_disk_dumpconf; 68 69static struct g_class g_disk_class = { 70 .name = "DISK", 71 .version = G_VERSION, 72 .init = g_disk_init, 73 .fini = g_disk_fini, 74 .start = g_disk_start, 75 .access = g_disk_access, 76 .ioctl = g_disk_ioctl, 77 .dumpconf = g_disk_dumpconf, 78}; 79 80static void 81g_disk_init(struct g_class *mp __unused) 82{ 83 84 mtx_init(&g_disk_done_mtx, "g_disk_done", NULL, MTX_DEF); 85} 86 87static void 88g_disk_fini(struct g_class *mp __unused) 89{ 90 91 mtx_destroy(&g_disk_done_mtx); 92} 93 94DECLARE_GEOM_CLASS(g_disk_class, g_disk); 95 96static void __inline 97g_disk_lock_giant(struct disk *dp) 98{ 99 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 100 mtx_lock(&Giant); 101} 102 103static void __inline 104g_disk_unlock_giant(struct disk *dp) 105{ 106 if (dp->d_flags & DISKFLAG_NEEDSGIANT) 107 mtx_unlock(&Giant); 108} 109 110static int 111g_disk_access(struct g_provider *pp, int r, int w, int e) 112{ 113 struct disk *dp; 114 int error; 115 116 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 117 pp->name, r, w, e); 118 g_topology_assert(); 119 dp = pp->geom->softc; 120 if (dp == NULL || dp->d_destroyed) { 121 /* 122 * Allow decreasing access count even if disk is not 123 * avaliable anymore. 124 */ 125 if (r <= 0 && w <= 0 && e <= 0) 126 return (0); 127 return (ENXIO); 128 } 129 r += pp->acr; 130 w += pp->acw; 131 e += pp->ace; 132 error = 0; 133 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 134 if (dp->d_open != NULL) { 135 g_disk_lock_giant(dp); 136 error = dp->d_open(dp); 137 if (bootverbose && error != 0) 138 printf("Opened disk %s -> %d\n", 139 pp->name, error); 140 g_disk_unlock_giant(dp); 141 } 142 pp->mediasize = dp->d_mediasize; 143 pp->sectorsize = dp->d_sectorsize; 144 dp->d_flags |= DISKFLAG_OPEN; 145 if (dp->d_maxsize == 0) { 146 printf("WARNING: Disk drive %s%d has no d_maxsize\n", 147 dp->d_name, dp->d_unit); 148 dp->d_maxsize = DFLTPHYS; 149 } 150 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 151 if (dp->d_close != NULL) { 152 g_disk_lock_giant(dp); 153 error = dp->d_close(dp); 154 if (error != 0) 155 printf("Closed disk %s -> %d\n", 156 pp->name, error); 157 g_disk_unlock_giant(dp); 158 } 159 dp->d_flags &= ~DISKFLAG_OPEN; 160 } 161 return (error); 162} 163 164static void 165g_disk_kerneldump(struct bio *bp, struct disk *dp) 166{ 167 int error; 168 struct g_kerneldump *gkd; 169 struct dumperinfo di; 170 struct g_geom *gp; 171 172 gkd = (struct g_kerneldump*)bp->bio_data; 173 gp = bp->bio_to->geom; 174 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)", 175 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 176 if (dp->d_dump == NULL) { 177 g_io_deliver(bp, ENODEV); 178 return; 179 } 180 di.dumper = dp->d_dump; 181 di.priv = dp; 182 di.blocksize = dp->d_sectorsize; 183 di.maxiosize = dp->d_maxsize; 184 di.mediaoffset = gkd->offset; 185 if ((gkd->offset + gkd->length) > dp->d_mediasize) 186 gkd->length = dp->d_mediasize - gkd->offset; 187 di.mediasize = gkd->length; 188 error = set_dumper(&di); 189 g_io_deliver(bp, error); 190} 191 192static void 193g_disk_done(struct bio *bp) 194{ 195 struct bio *bp2; 196 struct disk *dp; 197 198 /* See "notes" for why we need a mutex here */ 199 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 200 mtx_lock(&g_disk_done_mtx); 201 bp->bio_completed = bp->bio_length - bp->bio_resid; 202 203 bp2 = bp->bio_parent; 204 if (bp2->bio_error == 0) 205 bp2->bio_error = bp->bio_error; 206 bp2->bio_completed += bp->bio_completed; 207 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) && 208 (dp = bp2->bio_to->geom->softc)) { 209 devstat_end_transaction_bio(dp->d_devstat, bp); 210 } 211 g_destroy_bio(bp); 212 bp2->bio_inbed++; 213 if (bp2->bio_children == bp2->bio_inbed) { 214 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 215 g_io_deliver(bp2, bp2->bio_error); 216 } 217 mtx_unlock(&g_disk_done_mtx); 218} 219 220static int 221g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 222{ 223 struct g_geom *gp; 224 struct disk *dp; 225 int error; 226 227 gp = pp->geom; 228 dp = gp->softc; 229 230 if (dp->d_ioctl == NULL) 231 return (ENOIOCTL); 232 g_disk_lock_giant(dp); 233 error = dp->d_ioctl(dp, cmd, data, fflag, td); 234 g_disk_unlock_giant(dp); 235 return(error); 236} 237 238static void 239g_disk_start(struct bio *bp) 240{ 241 struct bio *bp2, *bp3; 242 struct disk *dp; 243 int error; 244 off_t off; 245 246 dp = bp->bio_to->geom->softc; 247 if (dp == NULL || dp->d_destroyed) { 248 g_io_deliver(bp, ENXIO); 249 return; 250 } 251 error = EJUSTRETURN; 252 switch(bp->bio_cmd) { 253 case BIO_DELETE: 254 if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 255 error = 0; 256 break; 257 } 258 /* fall-through */ 259 case BIO_READ: 260 case BIO_WRITE: 261 off = 0; 262 bp3 = NULL; 263 bp2 = g_clone_bio(bp); 264 if (bp2 == NULL) { 265 error = ENOMEM; 266 break; 267 } 268 do { 269 bp2->bio_offset += off; 270 bp2->bio_length -= off; 271 bp2->bio_data += off; 272 if (bp2->bio_length > dp->d_maxsize) { 273 /* 274 * XXX: If we have a stripesize we should really 275 * use it here. 276 */ 277 bp2->bio_length = dp->d_maxsize; 278 off += dp->d_maxsize; 279 /* 280 * To avoid a race, we need to grab the next bio 281 * before we schedule this one. See "notes". 282 */ 283 bp3 = g_clone_bio(bp); 284 if (bp3 == NULL) 285 bp->bio_error = ENOMEM; 286 } 287 bp2->bio_done = g_disk_done; 288 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 289 bp2->bio_bcount = bp2->bio_length; 290 bp2->bio_disk = dp; 291 devstat_start_transaction_bio(dp->d_devstat, bp2); 292 g_disk_lock_giant(dp); 293 dp->d_strategy(bp2); 294 g_disk_unlock_giant(dp); 295 bp2 = bp3; 296 bp3 = NULL; 297 } while (bp2 != NULL); 298 break; 299 case BIO_GETATTR: 300 if (g_handleattr_int(bp, "GEOM::candelete", 301 (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 302 break; 303 else if (g_handleattr_int(bp, "GEOM::fwsectors", 304 dp->d_fwsectors)) 305 break; 306 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 307 break; 308 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 309 break; 310 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 311 break; 312 else if (g_handleattr(bp, "GEOM::hba_vendor", 313 &dp->d_hba_vendor, 2)) 314 break; 315 else if (g_handleattr(bp, "GEOM::hba_device", 316 &dp->d_hba_device, 2)) 317 break; 318 else if (g_handleattr(bp, "GEOM::hba_subvendor", 319 &dp->d_hba_subvendor, 2)) 320 break; 321 else if (g_handleattr(bp, "GEOM::hba_subdevice", 322 &dp->d_hba_subdevice, 2)) 323 break; 324 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 325 g_disk_kerneldump(bp, dp); 326 else 327 error = ENOIOCTL; 328 break; 329 case BIO_FLUSH: 330 g_trace(G_T_TOPOLOGY, "g_disk_flushcache(%s)", 331 bp->bio_to->name); 332 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 333 g_io_deliver(bp, ENODEV); 334 return; 335 } 336 bp2 = g_clone_bio(bp); 337 if (bp2 == NULL) { 338 g_io_deliver(bp, ENOMEM); 339 return; 340 } 341 bp2->bio_done = g_disk_done; 342 bp2->bio_disk = dp; 343 g_disk_lock_giant(dp); 344 dp->d_strategy(bp2); 345 g_disk_unlock_giant(dp); 346 break; 347 default: 348 error = EOPNOTSUPP; 349 break; 350 } 351 if (error != EJUSTRETURN) 352 g_io_deliver(bp, error); 353 return; 354} 355 356static void 357g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 358{ 359 struct disk *dp; 360 361 dp = gp->softc; 362 if (dp == NULL) 363 return; 364 if (indent == NULL) { 365 sbuf_printf(sb, " hd %u", dp->d_fwheads); 366 sbuf_printf(sb, " sc %u", dp->d_fwsectors); 367 return; 368 } 369 if (pp != NULL) { 370 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 371 indent, dp->d_fwheads); 372 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 373 indent, dp->d_fwsectors);
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| 374 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, dp->d_ident); 375 sbuf_printf(sb, "%s<descr>%s</descr>\n", indent, dp->d_descr);
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374 } 375} 376 377static void 378g_disk_create(void *arg, int flag) 379{ 380 struct g_geom *gp; 381 struct g_provider *pp; 382 struct disk *dp; 383 384 if (flag == EV_CANCEL) 385 return; 386 g_topology_assert(); 387 dp = arg; 388 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 389 gp->softc = dp; 390 pp = g_new_providerf(gp, "%s", gp->name); 391 pp->mediasize = dp->d_mediasize; 392 pp->sectorsize = dp->d_sectorsize; 393 if (dp->d_flags & DISKFLAG_CANDELETE) 394 pp->flags |= G_PF_CANDELETE; 395 pp->stripeoffset = dp->d_stripeoffset; 396 pp->stripesize = dp->d_stripesize; 397 if (bootverbose) 398 printf("GEOM: new disk %s\n", gp->name); 399 dp->d_geom = gp; 400 g_error_provider(pp, 0); 401} 402 403static void 404g_disk_destroy(void *ptr, int flag) 405{ 406 struct disk *dp; 407 struct g_geom *gp; 408 409 g_topology_assert(); 410 dp = ptr; 411 gp = dp->d_geom; 412 if (gp != NULL) { 413 gp->softc = NULL; 414 g_wither_geom(gp, ENXIO); 415 } 416 g_free(dp); 417} 418 419/* 420 * We only allow printable characters in disk ident, 421 * the rest is converted to 'x<HH>'. 422 */ 423static void 424g_disk_ident_adjust(char *ident, size_t size) 425{ 426 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 427 428 newid[0] = '\0'; 429 for (p = ident; *p != '\0'; p++) { 430 if (isprint(*p)) { 431 tmp[0] = *p; 432 tmp[1] = '\0'; 433 } else { 434 snprintf(tmp, sizeof(tmp), "x%02hhx", 435 *(unsigned char *)p); 436 } 437 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 438 break; 439 } 440 bzero(ident, size); 441 strlcpy(ident, newid, size); 442} 443 444struct disk * 445disk_alloc() 446{ 447 struct disk *dp; 448 449 dp = g_malloc(sizeof *dp, M_WAITOK | M_ZERO); 450 return (dp); 451} 452 453void 454disk_create(struct disk *dp, int version) 455{ 456 if (version != DISK_VERSION_00 && version != DISK_VERSION_01) { 457 printf("WARNING: Attempt to add disk %s%d %s", 458 dp->d_name, dp->d_unit, 459 " using incompatible ABI version of disk(9)\n"); 460 printf("WARNING: Ignoring disk %s%d\n", 461 dp->d_name, dp->d_unit); 462 return; 463 } 464 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 465 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 466 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 467 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 468 if (dp->d_devstat == NULL) 469 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 470 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 471 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 472 dp->d_geom = NULL; 473 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 474 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 475} 476 477void 478disk_destroy(struct disk *dp) 479{ 480 481 g_cancel_event(dp); 482 dp->d_destroyed = 1; 483 if (dp->d_devstat != NULL) 484 devstat_remove_entry(dp->d_devstat); 485 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 486} 487 488void 489disk_gone(struct disk *dp) 490{ 491 struct g_geom *gp; 492 struct g_provider *pp; 493 494 gp = dp->d_geom; 495 if (gp != NULL) 496 LIST_FOREACH(pp, &gp->provider, provider) 497 g_wither_provider(pp, ENXIO); 498} 499 500static void 501g_kern_disks(void *p, int flag __unused) 502{ 503 struct sbuf *sb; 504 struct g_geom *gp; 505 char *sp; 506 507 sb = p; 508 sp = ""; 509 g_topology_assert(); 510 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 511 sbuf_printf(sb, "%s%s", sp, gp->name); 512 sp = " "; 513 } 514 sbuf_finish(sb); 515} 516 517static int 518sysctl_disks(SYSCTL_HANDLER_ARGS) 519{ 520 int error; 521 struct sbuf *sb; 522 523 sb = sbuf_new_auto(); 524 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 525 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 526 sbuf_delete(sb); 527 return error; 528} 529 530SYSCTL_PROC(_kern, OID_AUTO, disks, 531 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 532 sysctl_disks, "A", "names of available disks"); 533
| 376 } 377} 378 379static void 380g_disk_create(void *arg, int flag) 381{ 382 struct g_geom *gp; 383 struct g_provider *pp; 384 struct disk *dp; 385 386 if (flag == EV_CANCEL) 387 return; 388 g_topology_assert(); 389 dp = arg; 390 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 391 gp->softc = dp; 392 pp = g_new_providerf(gp, "%s", gp->name); 393 pp->mediasize = dp->d_mediasize; 394 pp->sectorsize = dp->d_sectorsize; 395 if (dp->d_flags & DISKFLAG_CANDELETE) 396 pp->flags |= G_PF_CANDELETE; 397 pp->stripeoffset = dp->d_stripeoffset; 398 pp->stripesize = dp->d_stripesize; 399 if (bootverbose) 400 printf("GEOM: new disk %s\n", gp->name); 401 dp->d_geom = gp; 402 g_error_provider(pp, 0); 403} 404 405static void 406g_disk_destroy(void *ptr, int flag) 407{ 408 struct disk *dp; 409 struct g_geom *gp; 410 411 g_topology_assert(); 412 dp = ptr; 413 gp = dp->d_geom; 414 if (gp != NULL) { 415 gp->softc = NULL; 416 g_wither_geom(gp, ENXIO); 417 } 418 g_free(dp); 419} 420 421/* 422 * We only allow printable characters in disk ident, 423 * the rest is converted to 'x<HH>'. 424 */ 425static void 426g_disk_ident_adjust(char *ident, size_t size) 427{ 428 char *p, tmp[4], newid[DISK_IDENT_SIZE]; 429 430 newid[0] = '\0'; 431 for (p = ident; *p != '\0'; p++) { 432 if (isprint(*p)) { 433 tmp[0] = *p; 434 tmp[1] = '\0'; 435 } else { 436 snprintf(tmp, sizeof(tmp), "x%02hhx", 437 *(unsigned char *)p); 438 } 439 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 440 break; 441 } 442 bzero(ident, size); 443 strlcpy(ident, newid, size); 444} 445 446struct disk * 447disk_alloc() 448{ 449 struct disk *dp; 450 451 dp = g_malloc(sizeof *dp, M_WAITOK | M_ZERO); 452 return (dp); 453} 454 455void 456disk_create(struct disk *dp, int version) 457{ 458 if (version != DISK_VERSION_00 && version != DISK_VERSION_01) { 459 printf("WARNING: Attempt to add disk %s%d %s", 460 dp->d_name, dp->d_unit, 461 " using incompatible ABI version of disk(9)\n"); 462 printf("WARNING: Ignoring disk %s%d\n", 463 dp->d_name, dp->d_unit); 464 return; 465 } 466 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 467 KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 468 KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 469 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 470 if (dp->d_devstat == NULL) 471 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 472 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 473 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 474 dp->d_geom = NULL; 475 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 476 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 477} 478 479void 480disk_destroy(struct disk *dp) 481{ 482 483 g_cancel_event(dp); 484 dp->d_destroyed = 1; 485 if (dp->d_devstat != NULL) 486 devstat_remove_entry(dp->d_devstat); 487 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 488} 489 490void 491disk_gone(struct disk *dp) 492{ 493 struct g_geom *gp; 494 struct g_provider *pp; 495 496 gp = dp->d_geom; 497 if (gp != NULL) 498 LIST_FOREACH(pp, &gp->provider, provider) 499 g_wither_provider(pp, ENXIO); 500} 501 502static void 503g_kern_disks(void *p, int flag __unused) 504{ 505 struct sbuf *sb; 506 struct g_geom *gp; 507 char *sp; 508 509 sb = p; 510 sp = ""; 511 g_topology_assert(); 512 LIST_FOREACH(gp, &g_disk_class.geom, geom) { 513 sbuf_printf(sb, "%s%s", sp, gp->name); 514 sp = " "; 515 } 516 sbuf_finish(sb); 517} 518 519static int 520sysctl_disks(SYSCTL_HANDLER_ARGS) 521{ 522 int error; 523 struct sbuf *sb; 524 525 sb = sbuf_new_auto(); 526 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 527 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 528 sbuf_delete(sb); 529 return error; 530} 531 532SYSCTL_PROC(_kern, OID_AUTO, disks, 533 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 534 sysctl_disks, "A", "names of available disks"); 535
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