geom_disk.c revision 169287
192108Sphk/*- 292108Sphk * Copyright (c) 2002 Poul-Henning Kamp 392108Sphk * Copyright (c) 2002 Networks Associates Technology, Inc. 492108Sphk * All rights reserved. 592108Sphk * 692108Sphk * This software was developed for the FreeBSD Project by Poul-Henning Kamp 792108Sphk * and NAI Labs, the Security Research Division of Network Associates, Inc. 892108Sphk * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 992108Sphk * DARPA CHATS research program. 1092108Sphk * 1192108Sphk * Redistribution and use in source and binary forms, with or without 1292108Sphk * modification, are permitted provided that the following conditions 1392108Sphk * are met: 1492108Sphk * 1. Redistributions of source code must retain the above copyright 1592108Sphk * notice, this list of conditions and the following disclaimer. 1692108Sphk * 2. Redistributions in binary form must reproduce the above copyright 1792108Sphk * notice, this list of conditions and the following disclaimer in the 1892108Sphk * documentation and/or other materials provided with the distribution. 1992108Sphk * 3. The names of the authors may not be used to endorse or promote 2092108Sphk * products derived from this software without specific prior written 2192108Sphk * permission. 2292108Sphk * 2392108Sphk * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 2492108Sphk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2592108Sphk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2692108Sphk * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2792108Sphk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2892108Sphk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2992108Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3092108Sphk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3192108Sphk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3292108Sphk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3392108Sphk * SUCH DAMAGE. 3492108Sphk */ 3592108Sphk 36116196Sobrien#include <sys/cdefs.h> 37116196Sobrien__FBSDID("$FreeBSD: head/sys/geom/geom_disk.c 169287 2007-05-05 17:47:20Z pjd $"); 38116196Sobrien 39104519Sphk#include "opt_geom.h" 40104519Sphk 4192108Sphk#include <sys/param.h> 4292108Sphk#include <sys/systm.h> 4392108Sphk#include <sys/kernel.h> 4492108Sphk#include <sys/sysctl.h> 4592108Sphk#include <sys/bio.h> 4692108Sphk#include <sys/conf.h> 47110119Sphk#include <sys/fcntl.h> 4892108Sphk#include <sys/malloc.h> 4992108Sphk#include <sys/sysctl.h> 50111979Sphk#include <sys/devicestat.h> 5192108Sphk#include <machine/md_var.h> 5292108Sphk 5392108Sphk#include <sys/lock.h> 5492108Sphk#include <sys/mutex.h> 5592108Sphk#include <geom/geom.h> 56112952Sphk#include <geom/geom_disk.h> 57112476Sphk#include <geom/geom_int.h> 5892108Sphk 59110720Sphkstatic struct mtx g_disk_done_mtx; 60110720Sphk 6192108Sphkstatic g_access_t g_disk_access; 62115473Sphkstatic g_init_t g_disk_init; 63115473Sphkstatic g_fini_t g_disk_fini; 64133314Sphkstatic g_start_t g_disk_start; 65133314Sphkstatic g_ioctl_t g_disk_ioctl; 66133314Sphkstatic g_dumpconf_t g_disk_dumpconf; 6792108Sphk 68141624Sphkstatic struct g_class g_disk_class = { 69112552Sphk .name = "DISK", 70133318Sphk .version = G_VERSION, 71115473Sphk .init = g_disk_init, 72115473Sphk .fini = g_disk_fini, 73133314Sphk .start = g_disk_start, 74133314Sphk .access = g_disk_access, 75133314Sphk .ioctl = g_disk_ioctl, 76133314Sphk .dumpconf = g_disk_dumpconf, 7792108Sphk}; 7892108Sphk 79110720Sphkstatic void 80115473Sphkg_disk_init(struct g_class *mp __unused) 81110720Sphk{ 82115473Sphk 83123271Struckman mtx_init(&g_disk_done_mtx, "g_disk_done", NULL, MTX_DEF); 84110720Sphk} 85104936Sphk 86115473Sphkstatic void 87115473Sphkg_disk_fini(struct g_class *mp __unused) 88115473Sphk{ 89110720Sphk 90115473Sphk mtx_destroy(&g_disk_done_mtx); 91115473Sphk} 92115473Sphk 93115473SphkDECLARE_GEOM_CLASS(g_disk_class, g_disk); 94115473Sphk 95110052Sphkstatic void __inline 96110052Sphkg_disk_lock_giant(struct disk *dp) 97110052Sphk{ 98125975Sphk if (dp->d_flags & DISKFLAG_NEEDSGIANT) 99125975Sphk mtx_lock(&Giant); 100110052Sphk} 101110052Sphk 102110052Sphkstatic void __inline 103110052Sphkg_disk_unlock_giant(struct disk *dp) 104110052Sphk{ 105125975Sphk if (dp->d_flags & DISKFLAG_NEEDSGIANT) 106125975Sphk mtx_unlock(&Giant); 107110052Sphk} 108110052Sphk 10992108Sphkstatic int 11092108Sphkg_disk_access(struct g_provider *pp, int r, int w, int e) 11192108Sphk{ 11292108Sphk struct disk *dp; 11392108Sphk int error; 11492108Sphk 11592108Sphk g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 11692108Sphk pp->name, r, w, e); 11792108Sphk g_topology_assert(); 118125539Spjd dp = pp->geom->softc; 119125975Sphk if (dp == NULL || dp->d_destroyed) { 120125539Spjd /* 121125539Spjd * Allow decreasing access count even if disk is not 122125539Spjd * avaliable anymore. 123125539Spjd */ 124125539Spjd if (r <= 0 && w <= 0 && e <= 0) 125125539Spjd return (0); 126125975Sphk return (ENXIO); 127125539Spjd } 12892108Sphk r += pp->acr; 12992108Sphk w += pp->acw; 13092108Sphk e += pp->ace; 131110119Sphk error = 0; 13292108Sphk if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 133111668Sphk if (dp->d_open != NULL) { 134110119Sphk g_disk_lock_giant(dp); 135111668Sphk error = dp->d_open(dp); 136166861Sn_hibma if (bootverbose && error != 0) 137110119Sphk printf("Opened disk %s -> %d\n", 138110119Sphk pp->name, error); 139110119Sphk g_disk_unlock_giant(dp); 140110119Sphk } 141105551Sphk pp->mediasize = dp->d_mediasize; 142105551Sphk pp->sectorsize = dp->d_sectorsize; 143110119Sphk dp->d_flags |= DISKFLAG_OPEN; 144110727Sphk if (dp->d_maxsize == 0) { 145110727Sphk printf("WARNING: Disk drive %s%d has no d_maxsize\n", 146110727Sphk dp->d_name, dp->d_unit); 147110727Sphk dp->d_maxsize = DFLTPHYS; 148110727Sphk } 14992108Sphk } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 150111668Sphk if (dp->d_close != NULL) { 151110119Sphk g_disk_lock_giant(dp); 152111668Sphk error = dp->d_close(dp); 153110119Sphk if (error != 0) 154110119Sphk printf("Closed disk %s -> %d\n", 155110119Sphk pp->name, error); 156110119Sphk g_disk_unlock_giant(dp); 157110119Sphk } 158110119Sphk dp->d_flags &= ~DISKFLAG_OPEN; 15992108Sphk } 16092108Sphk return (error); 16192108Sphk} 16292108Sphk 16392108Sphkstatic void 16495038Sphkg_disk_kerneldump(struct bio *bp, struct disk *dp) 16595038Sphk{ 16695038Sphk int error; 16795038Sphk struct g_kerneldump *gkd; 16895038Sphk struct dumperinfo di; 169104450Sphk struct g_geom *gp; 17095038Sphk 17195038Sphk gkd = (struct g_kerneldump*)bp->bio_data; 172104450Sphk gp = bp->bio_to->geom; 173104450Sphk g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)", 174104450Sphk gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 175120572Sphk if (dp->d_dump == NULL) { 176120572Sphk g_io_deliver(bp, ENODEV); 177120572Sphk return; 178120572Sphk } 179110119Sphk di.dumper = dp->d_dump; 180111220Sphk di.priv = dp; 181103714Sphk di.blocksize = dp->d_sectorsize; 18295038Sphk di.mediaoffset = gkd->offset; 183140968Sphk if ((gkd->offset + gkd->length) > dp->d_mediasize) 184140968Sphk gkd->length = dp->d_mediasize - gkd->offset; 18595038Sphk di.mediasize = gkd->length; 18695038Sphk error = set_dumper(&di); 187104195Sphk g_io_deliver(bp, error); 18895038Sphk} 18995038Sphk 19095038Sphkstatic void 19192108Sphkg_disk_done(struct bio *bp) 19292108Sphk{ 193111979Sphk struct bio *bp2; 194111979Sphk struct disk *dp; 19592108Sphk 196110720Sphk /* See "notes" for why we need a mutex here */ 197110720Sphk /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */ 198110720Sphk mtx_lock(&g_disk_done_mtx); 19992108Sphk bp->bio_completed = bp->bio_length - bp->bio_resid; 200111979Sphk 201111979Sphk bp2 = bp->bio_parent; 202111979Sphk if (bp2->bio_error == 0) 203111979Sphk bp2->bio_error = bp->bio_error; 204111979Sphk bp2->bio_completed += bp->bio_completed; 205163833Spjd if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) && 206163833Spjd (dp = bp2->bio_to->geom->softc)) { 207150759Stegge devstat_end_transaction_bio(dp->d_devstat, bp); 208163833Spjd } 209111979Sphk g_destroy_bio(bp); 210111979Sphk bp2->bio_inbed++; 211111979Sphk if (bp2->bio_children == bp2->bio_inbed) { 212112259Sphk bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 213111979Sphk g_io_deliver(bp2, bp2->bio_error); 214111979Sphk } 215110720Sphk mtx_unlock(&g_disk_done_mtx); 21692108Sphk} 21792108Sphk 218119660Sphkstatic int 219138732Sphkg_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 220119660Sphk{ 221119660Sphk struct g_geom *gp; 222119660Sphk struct disk *dp; 223119660Sphk int error; 224119660Sphk 225119660Sphk gp = pp->geom; 226119660Sphk dp = gp->softc; 227119660Sphk 228119660Sphk if (dp->d_ioctl == NULL) 229119660Sphk return (ENOIOCTL); 230119660Sphk g_disk_lock_giant(dp); 231138732Sphk error = dp->d_ioctl(dp, cmd, data, fflag, td); 232119660Sphk g_disk_unlock_giant(dp); 233119660Sphk return(error); 234119660Sphk} 235119660Sphk 23692108Sphkstatic void 23792108Sphkg_disk_start(struct bio *bp) 23892108Sphk{ 239110720Sphk struct bio *bp2, *bp3; 24092108Sphk struct disk *dp; 24192403Sphk int error; 242110720Sphk off_t off; 24392108Sphk 24492108Sphk dp = bp->bio_to->geom->softc; 245143791Sphk if (dp == NULL || dp->d_destroyed) { 246115214Sphk g_io_deliver(bp, ENXIO); 247143791Sphk return; 248143791Sphk } 249104609Sphk error = EJUSTRETURN; 25092108Sphk switch(bp->bio_cmd) { 251104609Sphk case BIO_DELETE: 252110119Sphk if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 253104609Sphk error = 0; 254104609Sphk break; 255104609Sphk } 256104609Sphk /* fall-through */ 25792108Sphk case BIO_READ: 25892108Sphk case BIO_WRITE: 259110720Sphk off = 0; 260110720Sphk bp3 = NULL; 26192108Sphk bp2 = g_clone_bio(bp); 262110477Sphk if (bp2 == NULL) { 263110477Sphk error = ENOMEM; 264110477Sphk break; 265110477Sphk } 266110720Sphk do { 267110720Sphk bp2->bio_offset += off; 268110720Sphk bp2->bio_length -= off; 269110766Stegge bp2->bio_data += off; 270110720Sphk if (bp2->bio_length > dp->d_maxsize) { 271110720Sphk /* 272110720Sphk * XXX: If we have a stripesize we should really 273110720Sphk * use it here. 274110720Sphk */ 275110720Sphk bp2->bio_length = dp->d_maxsize; 276110720Sphk off += dp->d_maxsize; 277110720Sphk /* 278110720Sphk * To avoid a race, we need to grab the next bio 279110720Sphk * before we schedule this one. See "notes". 280110720Sphk */ 281110720Sphk bp3 = g_clone_bio(bp); 282110720Sphk if (bp3 == NULL) 283110720Sphk bp->bio_error = ENOMEM; 284110720Sphk } 285110720Sphk bp2->bio_done = g_disk_done; 286110720Sphk bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 287110720Sphk bp2->bio_bcount = bp2->bio_length; 288110720Sphk bp2->bio_disk = dp; 289150759Stegge devstat_start_transaction_bio(dp->d_devstat, bp2); 290110720Sphk g_disk_lock_giant(dp); 291110720Sphk dp->d_strategy(bp2); 292110720Sphk g_disk_unlock_giant(dp); 293110720Sphk bp2 = bp3; 294110720Sphk bp3 = NULL; 295110720Sphk } while (bp2 != NULL); 29692108Sphk break; 29792108Sphk case BIO_GETATTR: 298105551Sphk if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors)) 29992403Sphk break; 300103714Sphk else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 30192403Sphk break; 30298066Sphk else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 30394287Sphk break; 304169285Spjd else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 305169285Spjd break; 30695038Sphk else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 30795038Sphk g_disk_kerneldump(bp, dp); 308119660Sphk else 30992403Sphk error = ENOIOCTL; 31092403Sphk break; 311163833Spjd case BIO_FLUSH: 312163833Spjd g_trace(G_T_TOPOLOGY, "g_disk_flushcache(%s)", 313163833Spjd bp->bio_to->name); 314163833Spjd if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 315163833Spjd g_io_deliver(bp, ENODEV); 316163833Spjd return; 317163833Spjd } 318163833Spjd bp2 = g_clone_bio(bp); 319163833Spjd if (bp2 == NULL) { 320163833Spjd g_io_deliver(bp, ENOMEM); 321163833Spjd return; 322163833Spjd } 323163833Spjd bp2->bio_done = g_disk_done; 324163833Spjd bp2->bio_disk = dp; 325163833Spjd g_disk_lock_giant(dp); 326163833Spjd dp->d_strategy(bp2); 327163833Spjd g_disk_unlock_giant(dp); 328163833Spjd break; 32992108Sphk default: 33092403Sphk error = EOPNOTSUPP; 33192403Sphk break; 33292403Sphk } 333104609Sphk if (error != EJUSTRETURN) 334104195Sphk g_io_deliver(bp, error); 33592403Sphk return; 33692108Sphk} 33792108Sphk 338104936Sphkstatic void 339107953Sphkg_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 340105537Sphk{ 341105537Sphk struct disk *dp; 342105537Sphk 343105537Sphk dp = gp->softc; 344120374Sphk if (dp == NULL) 345120374Sphk return; 346106101Sphk if (indent == NULL) { 347106101Sphk sbuf_printf(sb, " hd %u", dp->d_fwheads); 348106101Sphk sbuf_printf(sb, " sc %u", dp->d_fwsectors); 349106101Sphk return; 350106101Sphk } 351105539Sphk if (pp != NULL) { 352105537Sphk sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 353105537Sphk indent, dp->d_fwheads); 354105537Sphk sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 355105537Sphk indent, dp->d_fwsectors); 356105537Sphk } 357105537Sphk} 358105537Sphk 359105537Sphkstatic void 360115309Sphkg_disk_create(void *arg, int flag) 36192108Sphk{ 36292108Sphk struct g_geom *gp; 36392108Sphk struct g_provider *pp; 364110708Sphk struct disk *dp; 36592108Sphk 366115309Sphk if (flag == EV_CANCEL) 367115309Sphk return; 368104936Sphk g_topology_assert(); 369110708Sphk dp = arg; 370110708Sphk gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 371110708Sphk gp->softc = dp; 372104936Sphk pp = g_new_providerf(gp, "%s", gp->name); 373110708Sphk pp->mediasize = dp->d_mediasize; 374110708Sphk pp->sectorsize = dp->d_sectorsize; 375110708Sphk if (dp->d_flags & DISKFLAG_CANDELETE) 376110708Sphk pp->flags |= G_PF_CANDELETE; 377110710Sphk pp->stripeoffset = dp->d_stripeoffset; 378110710Sphk pp->stripesize = dp->d_stripesize; 379105957Sphk if (bootverbose) 380105957Sphk printf("GEOM: new disk %s\n", gp->name); 381112989Sphk dp->d_geom = gp; 382112989Sphk g_error_provider(pp, 0); 383104936Sphk} 384104936Sphk 385119652Sphkstatic void 386119652Sphkg_disk_destroy(void *ptr, int flag) 387119652Sphk{ 388125975Sphk struct disk *dp; 389119652Sphk struct g_geom *gp; 390104936Sphk 391119652Sphk g_topology_assert(); 392125975Sphk dp = ptr; 393125975Sphk gp = dp->d_geom; 394140261Sphk if (gp != NULL) { 395140261Sphk gp->softc = NULL; 396140261Sphk g_wither_geom(gp, ENXIO); 397140261Sphk } 398125975Sphk g_free(dp); 399119652Sphk} 400104936Sphk 401169287Spjd/* 402169287Spjd * We only allow [a-zA-Z0-9-_@#%.] characters, the rest is converted to 'x<HH>'. 403169287Spjd */ 404169287Spjdstatic void 405169287Spjdg_disk_ident_adjust(char *ident, size_t size) 406169287Spjd{ 407169287Spjd char newid[DISK_IDENT_SIZE], tmp[4]; 408169287Spjd size_t len; 409169287Spjd char *p; 410169287Spjd 411169287Spjd bzero(newid, sizeof(newid)); 412169287Spjd len = 0; 413169287Spjd for (p = ident; *p != '\0' && len < sizeof(newid) - 1; p++) { 414169287Spjd switch (*p) { 415169287Spjd default: 416169287Spjd if ((*p < 'a' || *p > 'z') && 417169287Spjd (*p < 'A' || *p > 'Z') && 418169287Spjd (*p < '0' || *p > '9')) { 419169287Spjd snprintf(tmp, sizeof(tmp), "x%02hhx", *p); 420169287Spjd strlcat(newid, tmp, sizeof(newid)); 421169287Spjd len += 3; 422169287Spjd break; 423169287Spjd } 424169287Spjd /* FALLTHROUGH */ 425169287Spjd case '-': 426169287Spjd case '_': 427169287Spjd case '@': 428169287Spjd case '#': 429169287Spjd case '%': 430169287Spjd case '.': 431169287Spjd newid[len++] = *p; 432169287Spjd break; 433169287Spjd } 434169287Spjd } 435169287Spjd bzero(ident, size); 436169287Spjd strlcpy(ident, newid, size); 437169287Spjd} 438169287Spjd 439125975Sphkstruct disk * 440125975Sphkdisk_alloc() 441125975Sphk{ 442125975Sphk struct disk *dp; 443125975Sphk 444125975Sphk dp = g_malloc(sizeof *dp, M_WAITOK | M_ZERO); 445125975Sphk return (dp); 446125975Sphk} 447125975Sphk 448111668Sphkvoid 449125975Sphkdisk_create(struct disk *dp, int version) 450104936Sphk{ 451169285Spjd if (version != DISK_VERSION_00 && version != DISK_VERSION_01) { 452125975Sphk printf("WARNING: Attempt to add disk %s%d %s", 453125975Sphk dp->d_name, dp->d_unit, 454125975Sphk " using incompatible ABI version of disk(9)\n"); 455125975Sphk printf("WARNING: Ignoring disk %s%d\n", 456125975Sphk dp->d_name, dp->d_unit); 457125975Sphk return; 458125975Sphk } 459110119Sphk KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 460110119Sphk KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 461110119Sphk KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 462110317Sphk KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 463120374Sphk if (dp->d_devstat == NULL) 464120374Sphk dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 465120374Sphk dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 466120374Sphk DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 467112989Sphk dp->d_geom = NULL; 468169287Spjd g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 469113937Sphk g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 47092108Sphk} 47192108Sphk 47292108Sphkvoid 473111216Sphkdisk_destroy(struct disk *dp) 47492108Sphk{ 47592108Sphk 476112989Sphk g_cancel_event(dp); 477125975Sphk dp->d_destroyed = 1; 478131207Sphk if (dp->d_devstat != NULL) 479131207Sphk devstat_remove_entry(dp->d_devstat); 480131267Sphk g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 48192108Sphk} 48292108Sphk 483152565Sjdpvoid 484152565Sjdpdisk_gone(struct disk *dp) 485152565Sjdp{ 486152565Sjdp struct g_geom *gp; 487152565Sjdp struct g_provider *pp; 488152565Sjdp 489152565Sjdp gp = dp->d_geom; 490152565Sjdp if (gp != NULL) 491152565Sjdp LIST_FOREACH(pp, &gp->provider, provider) 492157619Smarcel g_wither_provider(pp, ENXIO); 493152565Sjdp} 494152565Sjdp 495104451Sphkstatic void 496112988Sphkg_kern_disks(void *p, int flag __unused) 497104451Sphk{ 498104451Sphk struct sbuf *sb; 499104451Sphk struct g_geom *gp; 500104451Sphk char *sp; 501104451Sphk 502104451Sphk sb = p; 503104451Sphk sp = ""; 504104451Sphk g_topology_assert(); 505104451Sphk LIST_FOREACH(gp, &g_disk_class.geom, geom) { 506104451Sphk sbuf_printf(sb, "%s%s", sp, gp->name); 507104451Sphk sp = " "; 508104451Sphk } 509104451Sphk sbuf_finish(sb); 510104451Sphk} 511104451Sphk 512104451Sphkstatic int 513104451Sphksysctl_disks(SYSCTL_HANDLER_ARGS) 514104451Sphk{ 515104451Sphk int error; 516104451Sphk struct sbuf *sb; 517104451Sphk 518104451Sphk sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND); 519113940Sphk g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 520113937Sphk error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 521104451Sphk sbuf_delete(sb); 522104451Sphk return error; 523104451Sphk} 524104451Sphk 525104451SphkSYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0, 526104451Sphk sysctl_disks, "A", "names of available disks"); 527104519Sphk 528