geom_slice.c revision 131046
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_slice.c 131046 2004-06-24 10:50:20Z pjd $"); 3892108Sphk 3992108Sphk#include <sys/param.h> 4092108Sphk#include <sys/systm.h> 4192108Sphk#include <sys/kernel.h> 4292108Sphk#include <sys/malloc.h> 4392108Sphk#include <sys/bio.h> 4492108Sphk#include <sys/sysctl.h> 4592108Sphk#include <sys/proc.h> 4692108Sphk#include <sys/kthread.h> 4792108Sphk#include <sys/lock.h> 4892108Sphk#include <sys/mutex.h> 4992108Sphk#include <sys/errno.h> 5092108Sphk#include <sys/sbuf.h> 5192108Sphk#include <geom/geom.h> 5292108Sphk#include <geom/geom_slice.h> 5392108Sphk#include <machine/stdarg.h> 5492108Sphk 5593776Sphkstatic g_orphan_t g_slice_orphan; 5693776Sphkstatic g_access_t g_slice_access; 5793776Sphkstatic g_start_t g_slice_start; 5893776Sphk 5995321Sphkstatic struct g_slicer * 60114493Sphkg_slice_alloc(unsigned nslice, unsigned scsize) 6192108Sphk{ 6292108Sphk struct g_slicer *gsp; 6392108Sphk 64111119Simp gsp = g_malloc(sizeof *gsp, M_WAITOK | M_ZERO); 65131046Spjd if (scsize > 0) 66131046Spjd gsp->softc = g_malloc(scsize, M_WAITOK | M_ZERO); 67131046Spjd else 68131046Spjd gsp->softc = NULL; 69104057Sphk gsp->slices = g_malloc(nslice * sizeof(struct g_slice), 70111119Simp M_WAITOK | M_ZERO); 7192108Sphk gsp->nslice = nslice; 7292108Sphk return (gsp); 7392108Sphk} 7492108Sphk 75114493Sphkstatic void 76114493Sphkg_slice_free(struct g_slicer *gsp) 77114493Sphk{ 78114493Sphk 79114493Sphk g_free(gsp->slices); 80114493Sphk if (gsp->hotspot != NULL) 81114493Sphk g_free(gsp->hotspot); 82114493Sphk g_free(gsp->softc); 83114493Sphk g_free(gsp); 84114493Sphk} 85114493Sphk 8693776Sphkstatic int 8792108Sphkg_slice_access(struct g_provider *pp, int dr, int dw, int de) 8892108Sphk{ 89107953Sphk int error; 90107953Sphk u_int u; 9192108Sphk struct g_geom *gp; 9292108Sphk struct g_consumer *cp; 9392108Sphk struct g_provider *pp2; 9492108Sphk struct g_slicer *gsp; 9592108Sphk struct g_slice *gsl, *gsl2; 9692108Sphk 9792108Sphk gp = pp->geom; 9892108Sphk cp = LIST_FIRST(&gp->consumer); 9992108Sphk KASSERT (cp != NULL, ("g_slice_access but no consumer")); 10092108Sphk gsp = gp->softc; 10192108Sphk gsl = &gsp->slices[pp->index]; 102107953Sphk for (u = 0; u < gsp->nslice; u++) { 103107953Sphk gsl2 = &gsp->slices[u]; 10492108Sphk if (gsl2->length == 0) 10592108Sphk continue; 106107953Sphk if (u == pp->index) 10792108Sphk continue; 10892108Sphk if (gsl->offset + gsl->length <= gsl2->offset) 10992108Sphk continue; 11092108Sphk if (gsl2->offset + gsl2->length <= gsl->offset) 11192108Sphk continue; 11292108Sphk /* overlap */ 11392108Sphk pp2 = gsl2->provider; 11492108Sphk if ((pp->acw + dw) > 0 && pp2->ace > 0) 11592108Sphk return (EPERM); 11692108Sphk if ((pp->ace + de) > 0 && pp2->acw > 0) 11792108Sphk return (EPERM); 11892108Sphk } 11992108Sphk /* On first open, grab an extra "exclusive" bit */ 12092108Sphk if (cp->acr == 0 && cp->acw == 0 && cp->ace == 0) 12192108Sphk de++; 12292108Sphk /* ... and let go of it on last close */ 12392108Sphk if ((cp->acr + dr) == 0 && (cp->acw + dw) == 0 && (cp->ace + de) == 1) 12492108Sphk de--; 125125755Sphk error = g_access(cp, dr, dw, de); 12692108Sphk return (error); 12792108Sphk} 12892108Sphk 129113713Sphk/* 130113713Sphk * XXX: It should be possible to specify here if we should finish all of the 131113713Sphk * XXX: bio, or only the non-hot bits. This would get messy if there were 132113713Sphk * XXX: two hot spots in the same bio, so for now we simply finish off the 133113713Sphk * XXX: entire bio. Modifying hot data on the way to disk is frowned on 134113713Sphk * XXX: so making that considerably harder is not a bad idea anyway. 135113713Sphk */ 136107522Sphkvoid 137107522Sphkg_slice_finish_hot(struct bio *bp) 138107522Sphk{ 139107522Sphk struct bio *bp2; 140107522Sphk struct g_geom *gp; 141107522Sphk struct g_consumer *cp; 142107522Sphk struct g_slicer *gsp; 143107522Sphk struct g_slice *gsl; 144107953Sphk int idx; 145107522Sphk 146113713Sphk KASSERT(bp->bio_to != NULL, 147113713Sphk ("NULL bio_to in g_slice_finish_hot(%p)", bp)); 148113713Sphk KASSERT(bp->bio_from != NULL, 149113713Sphk ("NULL bio_from in g_slice_finish_hot(%p)", bp)); 150107522Sphk gp = bp->bio_to->geom; 151107522Sphk gsp = gp->softc; 152107522Sphk cp = LIST_FIRST(&gp->consumer); 153107522Sphk KASSERT(cp != NULL, ("NULL consumer in g_slice_finish_hot(%p)", bp)); 154107953Sphk idx = bp->bio_to->index; 155107953Sphk gsl = &gsp->slices[idx]; 156107522Sphk 157107522Sphk bp2 = g_clone_bio(bp); 158107522Sphk if (bp2 == NULL) { 159107522Sphk g_io_deliver(bp, ENOMEM); 160107522Sphk return; 161107522Sphk } 162107522Sphk if (bp2->bio_offset + bp2->bio_length > gsl->length) 163107522Sphk bp2->bio_length = gsl->length - bp2->bio_offset; 164107522Sphk bp2->bio_done = g_std_done; 165107522Sphk bp2->bio_offset += gsl->offset; 166107522Sphk g_io_request(bp2, cp); 167107522Sphk return; 168107522Sphk} 169107522Sphk 17093776Sphkstatic void 17192108Sphkg_slice_start(struct bio *bp) 17292108Sphk{ 17392108Sphk struct bio *bp2; 17492108Sphk struct g_provider *pp; 17592108Sphk struct g_geom *gp; 17692108Sphk struct g_consumer *cp; 17792108Sphk struct g_slicer *gsp; 178113712Sphk struct g_slice *gsl; 179113713Sphk struct g_slice_hot *ghp; 180107953Sphk int idx, error; 181107522Sphk u_int m_index; 18294287Sphk off_t t; 18392108Sphk 18492108Sphk pp = bp->bio_to; 18592108Sphk gp = pp->geom; 18692108Sphk gsp = gp->softc; 18792108Sphk cp = LIST_FIRST(&gp->consumer); 188107953Sphk idx = pp->index; 189107953Sphk gsl = &gsp->slices[idx]; 19092108Sphk switch(bp->bio_cmd) { 19192108Sphk case BIO_READ: 19292108Sphk case BIO_WRITE: 19392108Sphk case BIO_DELETE: 19492108Sphk if (bp->bio_offset > gsl->length) { 195104195Sphk g_io_deliver(bp, EINVAL); /* XXX: EWHAT ? */ 19692108Sphk return; 19792108Sphk } 198107522Sphk /* 199107522Sphk * Check if we collide with any hot spaces, and call the 200107522Sphk * method once if so. 201107522Sphk */ 202107832Sphk t = bp->bio_offset + gsl->offset; 203113712Sphk for (m_index = 0; m_index < gsp->nhotspot; m_index++) { 204113713Sphk ghp = &gsp->hotspot[m_index]; 205113713Sphk if (t >= ghp->offset + ghp->length) 206107522Sphk continue; 207113713Sphk if (t + bp->bio_length <= ghp->offset) 208107522Sphk continue; 209113713Sphk switch(bp->bio_cmd) { 210113713Sphk case BIO_READ: idx = ghp->ract; break; 211113713Sphk case BIO_WRITE: idx = ghp->wact; break; 212113713Sphk case BIO_DELETE: idx = ghp->dact; break; 213113713Sphk } 214113713Sphk switch(idx) { 215113713Sphk case G_SLICE_HOT_ALLOW: 216113713Sphk /* Fall out and continue normal processing */ 217113713Sphk continue; 218113713Sphk case G_SLICE_HOT_DENY: 219113713Sphk g_io_deliver(bp, EROFS); 220107522Sphk return; 221113713Sphk case G_SLICE_HOT_START: 222113713Sphk error = gsp->start(bp); 223113713Sphk if (error && error != EJUSTRETURN) 224113713Sphk g_io_deliver(bp, error); 225107522Sphk return; 226113713Sphk case G_SLICE_HOT_CALL: 227113937Sphk error = g_post_event(gsp->hot, bp, M_NOWAIT, 228113937Sphk gp, NULL); 229113713Sphk if (error) 230113713Sphk g_io_deliver(bp, error); 231113713Sphk return; 232107522Sphk } 233107522Sphk break; 234107522Sphk } 23592108Sphk bp2 = g_clone_bio(bp); 236104057Sphk if (bp2 == NULL) { 237104195Sphk g_io_deliver(bp, ENOMEM); 238104057Sphk return; 239104057Sphk } 24092108Sphk if (bp2->bio_offset + bp2->bio_length > gsl->length) 24192108Sphk bp2->bio_length = gsl->length - bp2->bio_offset; 24292108Sphk bp2->bio_done = g_std_done; 24392108Sphk bp2->bio_offset += gsl->offset; 24492108Sphk g_io_request(bp2, cp); 24592108Sphk return; 24692108Sphk case BIO_GETATTR: 24794287Sphk /* Give the real method a chance to override */ 248113878Sphk if (gsp->start != NULL && gsp->start(bp)) 24994287Sphk return; 25095038Sphk if (!strcmp("GEOM::kerneldump", bp->bio_attribute)) { 25195038Sphk struct g_kerneldump *gkd; 25295038Sphk 25395038Sphk gkd = (struct g_kerneldump *)bp->bio_data; 254107953Sphk gkd->offset += gsp->slices[idx].offset; 255107953Sphk if (gkd->length > gsp->slices[idx].length) 256107953Sphk gkd->length = gsp->slices[idx].length; 25795038Sphk /* now, pass it on downwards... */ 25895038Sphk } 25992108Sphk bp2 = g_clone_bio(bp); 260104081Sphk if (bp2 == NULL) { 261104195Sphk g_io_deliver(bp, ENOMEM); 262104081Sphk return; 263104081Sphk } 26492108Sphk bp2->bio_done = g_std_done; 26592108Sphk g_io_request(bp2, cp); 26692108Sphk break; 26792108Sphk default: 268104195Sphk g_io_deliver(bp, EOPNOTSUPP); 26992108Sphk return; 27092108Sphk } 27192108Sphk} 27292108Sphk 27392108Sphkvoid 274107953Sphkg_slice_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 27592108Sphk{ 27692108Sphk struct g_slicer *gsp; 27792108Sphk 27892108Sphk gsp = gp->softc; 279106101Sphk if (indent == NULL) { 280106101Sphk sbuf_printf(sb, " i %u", pp->index); 281106101Sphk sbuf_printf(sb, " o %ju", 282106101Sphk (uintmax_t)gsp->slices[pp->index].offset); 283106101Sphk return; 284106101Sphk } 28592108Sphk if (pp != NULL) { 28692108Sphk sbuf_printf(sb, "%s<index>%u</index>\n", indent, pp->index); 287105540Sphk sbuf_printf(sb, "%s<length>%ju</length>\n", 288105540Sphk indent, (uintmax_t)gsp->slices[pp->index].length); 289105540Sphk sbuf_printf(sb, "%s<seclength>%ju</seclength>\n", indent, 290105540Sphk (uintmax_t)gsp->slices[pp->index].length / 512); 291105540Sphk sbuf_printf(sb, "%s<offset>%ju</offset>\n", indent, 292105540Sphk (uintmax_t)gsp->slices[pp->index].offset); 293105540Sphk sbuf_printf(sb, "%s<secoffset>%ju</secoffset>\n", indent, 294105540Sphk (uintmax_t)gsp->slices[pp->index].offset / 512); 29592108Sphk } 29692108Sphk} 29792108Sphk 298104064Sphkint 299107953Sphkg_slice_config(struct g_geom *gp, u_int idx, int how, off_t offset, off_t length, u_int sectorsize, const char *fmt, ...) 300104064Sphk{ 301110710Sphk struct g_provider *pp, *pp2; 302104064Sphk struct g_slicer *gsp; 303104064Sphk struct g_slice *gsl; 304104064Sphk va_list ap; 305104064Sphk struct sbuf *sb; 306115506Sphk int acc; 307104064Sphk 308104195Sphk g_trace(G_T_TOPOLOGY, "g_slice_config(%s, %d, %d)", 309107953Sphk gp->name, idx, how); 310104064Sphk g_topology_assert(); 311104064Sphk gsp = gp->softc; 312107953Sphk if (idx >= gsp->nslice) 313104064Sphk return(EINVAL); 314107953Sphk gsl = &gsp->slices[idx]; 315104064Sphk pp = gsl->provider; 316104064Sphk if (pp != NULL) 317104064Sphk acc = pp->acr + pp->acw + pp->ace; 318104064Sphk else 319104064Sphk acc = 0; 320104064Sphk if (acc != 0 && how != G_SLICE_CONFIG_FORCE) { 321104064Sphk if (length < gsl->length) 322104064Sphk return(EBUSY); 323104064Sphk if (offset != gsl->offset) 324104064Sphk return(EBUSY); 325104064Sphk } 326104064Sphk /* XXX: check offset + length <= MEDIASIZE */ 327104064Sphk if (how == G_SLICE_CONFIG_CHECK) 328104064Sphk return (0); 329104064Sphk gsl->length = length; 330104064Sphk gsl->offset = offset; 331105542Sphk gsl->sectorsize = sectorsize; 332105957Sphk if (length == 0) { 333105957Sphk if (pp == NULL) 334105957Sphk return (0); 335105957Sphk if (bootverbose) 336105957Sphk printf("GEOM: Deconfigure %s\n", pp->name); 337104064Sphk g_orphan_provider(pp, ENXIO); 338104064Sphk gsl->provider = NULL; 339104064Sphk gsp->nprovider--; 340104064Sphk return (0); 341104064Sphk } 342105957Sphk if (pp != NULL) { 343105957Sphk if (bootverbose) 344105957Sphk printf("GEOM: Reconfigure %s, start %jd length %jd end %jd\n", 345105957Sphk pp->name, (intmax_t)offset, (intmax_t)length, 346105957Sphk (intmax_t)(offset + length - 1)); 347107116Sphk pp->mediasize = gsl->length; 348105957Sphk return (0); 349105957Sphk } 350115949Sphk sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND); 351104064Sphk va_start(ap, fmt); 352104064Sphk sbuf_vprintf(sb, fmt, ap); 353115949Sphk va_end(ap); 354104064Sphk sbuf_finish(sb); 355104064Sphk pp = g_new_providerf(gp, sbuf_data(sb)); 356110710Sphk pp2 = LIST_FIRST(&gp->consumer)->provider; 357110710Sphk pp->flags = pp2->flags & G_PF_CANDELETE; 358110713Sphk if (pp2->stripesize > 0) { 359110713Sphk pp->stripesize = pp2->stripesize; 360110713Sphk pp->stripeoffset = (pp2->stripeoffset + offset) % pp->stripesize; 361110713Sphk } 362105957Sphk if (bootverbose) 363105957Sphk printf("GEOM: Configure %s, start %jd length %jd end %jd\n", 364105957Sphk pp->name, (intmax_t)offset, (intmax_t)length, 365105957Sphk (intmax_t)(offset + length - 1)); 366107953Sphk pp->index = idx; 367105542Sphk pp->mediasize = gsl->length; 368105542Sphk pp->sectorsize = gsl->sectorsize; 369104064Sphk gsl->provider = pp; 370104064Sphk gsp->nprovider++; 371104064Sphk g_error_provider(pp, 0); 372104064Sphk sbuf_delete(sb); 373104064Sphk return(0); 374104064Sphk} 375104064Sphk 376113713Sphk/* 377113713Sphk * Configure "hotspots". A hotspot is a piece of the parent device which 378113713Sphk * this particular slicer cares about for some reason. Typically because 379113713Sphk * it contains meta-data used to configure the slicer. 380113713Sphk * A hotspot is identified by its index number. The offset and length are 381113713Sphk * relative to the parent device, and the three "?act" fields specify 382113713Sphk * what action to take on BIO_READ, BIO_DELETE and BIO_WRITE. 383113713Sphk * 384113713Sphk * XXX: There may be a race relative to g_slice_start() here, if an existing 385113713Sphk * XXX: hotspot is changed wile I/O is happening. Should this become a problem 386113713Sphk * XXX: we can protect the hotspot stuff with a mutex. 387113713Sphk */ 388113713Sphk 389107522Sphkint 390113713Sphkg_slice_conf_hot(struct g_geom *gp, u_int idx, off_t offset, off_t length, int ract, int dact, int wact) 391107522Sphk{ 392107522Sphk struct g_slicer *gsp; 393113712Sphk struct g_slice_hot *gsl, *gsl2; 394107522Sphk 395113713Sphk g_trace(G_T_TOPOLOGY, "g_slice_conf_hot(%s, idx: %d, off: %jd, len: %jd)", 396113713Sphk gp->name, idx, (intmax_t)offset, (intmax_t)length); 397107522Sphk g_topology_assert(); 398107522Sphk gsp = gp->softc; 399113712Sphk gsl = gsp->hotspot; 400113712Sphk if(idx >= gsp->nhotspot) { 401111119Simp gsl2 = g_malloc((idx + 1) * sizeof *gsl2, M_WAITOK | M_ZERO); 402113712Sphk if (gsp->hotspot != NULL) 403113712Sphk bcopy(gsp->hotspot, gsl2, gsp->nhotspot * sizeof *gsl2); 404113712Sphk gsp->hotspot = gsl2; 405113712Sphk if (gsp->hotspot != NULL) 406107522Sphk g_free(gsl); 407107522Sphk gsl = gsl2; 408113712Sphk gsp->nhotspot = idx + 1; 409107522Sphk } 410107953Sphk gsl[idx].offset = offset; 411107953Sphk gsl[idx].length = length; 412113878Sphk KASSERT(!((ract | dact | wact) & G_SLICE_HOT_START) 413113878Sphk || gsp->start != NULL, ("G_SLICE_HOT_START but no slice->start")); 414113878Sphk /* XXX: check that we _have_ a start function if HOT_START specified */ 415113713Sphk gsl[idx].ract = ract; 416113713Sphk gsl[idx].dact = dact; 417113713Sphk gsl[idx].wact = wact; 418107522Sphk return (0); 419107522Sphk} 420107522Sphk 421114504Sphkvoid 422114504Sphkg_slice_spoiled(struct g_consumer *cp) 423114504Sphk{ 424114504Sphk struct g_geom *gp; 425114504Sphk struct g_slicer *gsp; 426114504Sphk 427114504Sphk g_topology_assert(); 428114504Sphk gp = cp->geom; 429114504Sphk g_trace(G_T_TOPOLOGY, "g_slice_spoiled(%p/%s)", cp, gp->name); 430114504Sphk gsp = gp->softc; 431114504Sphk gp->softc = NULL; 432114504Sphk g_slice_free(gsp); 433114504Sphk g_wither_geom(gp, ENXIO); 434114504Sphk} 435114504Sphk 436115506Sphkint 437115506Sphkg_slice_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp) 438115506Sphk{ 439115506Sphk 440115506Sphk g_slice_spoiled(LIST_FIRST(&gp->consumer)); 441115506Sphk return (0); 442115506Sphk} 443115506Sphk 44492108Sphkstruct g_geom * 445107522Sphkg_slice_new(struct g_class *mp, u_int slices, struct g_provider *pp, struct g_consumer **cpp, void *extrap, int extra, g_slice_start_t *start) 44692108Sphk{ 44792108Sphk struct g_geom *gp; 44892108Sphk struct g_slicer *gsp; 44992108Sphk struct g_consumer *cp; 45092108Sphk void **vp; 451113390Sphk int error; 45292108Sphk 45392108Sphk g_topology_assert(); 45492108Sphk vp = (void **)extrap; 45592108Sphk gp = g_new_geomf(mp, "%s", pp->name); 456114493Sphk gsp = g_slice_alloc(slices, extra); 45792108Sphk gsp->start = start; 45893776Sphk gp->access = g_slice_access; 45993776Sphk gp->orphan = g_slice_orphan; 46092108Sphk gp->softc = gsp; 46192108Sphk gp->start = g_slice_start; 462114504Sphk gp->spoiled = g_slice_spoiled; 46392108Sphk gp->dumpconf = g_slice_dumpconf; 464115506Sphk if (gp->class->destroy_geom == NULL) 465115506Sphk gp->class->destroy_geom = g_slice_destroy_geom; 46692108Sphk cp = g_new_consumer(gp); 467105551Sphk error = g_attach(cp, pp); 468105551Sphk if (error == 0) 469125755Sphk error = g_access(cp, 1, 0, 0); 47092108Sphk if (error) { 471114504Sphk g_wither_geom(gp, ENXIO); 47292108Sphk return (NULL); 47392108Sphk } 474131046Spjd if (extrap != NULL) 475131046Spjd *vp = gsp->softc; 47692108Sphk *cpp = cp; 47792108Sphk return (gp); 47892108Sphk} 47992108Sphk 48093776Sphkstatic void 48193250Sphkg_slice_orphan(struct g_consumer *cp) 48292108Sphk{ 48392108Sphk 48492108Sphk g_trace(G_T_TOPOLOGY, "g_slice_orphan(%p/%s)", cp, cp->provider->name); 48592108Sphk g_topology_assert(); 48692108Sphk KASSERT(cp->provider->error != 0, 48792108Sphk ("g_slice_orphan with error == 0")); 48892108Sphk 489107522Sphk /* XXX: Not good enough we leak the softc and its suballocations */ 490114504Sphk g_slice_free(cp->geom->softc); 491114504Sphk g_wither_geom(cp->geom, cp->provider->error); 49292108Sphk} 493