geom_slice.c revision 157619
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 157619 2006-04-10 03:55:13Z marcel $"); 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_access_t g_slice_access; 5693776Sphkstatic g_start_t g_slice_start; 5793776Sphk 5895321Sphkstatic struct g_slicer * 59114493Sphkg_slice_alloc(unsigned nslice, unsigned scsize) 6092108Sphk{ 6192108Sphk struct g_slicer *gsp; 6292108Sphk 63111119Simp gsp = g_malloc(sizeof *gsp, M_WAITOK | M_ZERO); 64131046Spjd if (scsize > 0) 65131046Spjd gsp->softc = g_malloc(scsize, M_WAITOK | M_ZERO); 66131046Spjd else 67131046Spjd gsp->softc = NULL; 68104057Sphk gsp->slices = g_malloc(nslice * sizeof(struct g_slice), 69111119Simp M_WAITOK | M_ZERO); 7092108Sphk gsp->nslice = nslice; 7192108Sphk return (gsp); 7292108Sphk} 7392108Sphk 74114493Sphkstatic void 75114493Sphkg_slice_free(struct g_slicer *gsp) 76114493Sphk{ 77114493Sphk 78132631Sle if (gsp == NULL) /* XXX: phk thinks about this */ 79132631Sle return; 80114493Sphk g_free(gsp->slices); 81114493Sphk if (gsp->hotspot != NULL) 82114493Sphk g_free(gsp->hotspot); 83131408Spjd if (gsp->softc != NULL) 84131408Spjd g_free(gsp->softc); 85114493Sphk g_free(gsp); 86114493Sphk} 87114493Sphk 8893776Sphkstatic int 8992108Sphkg_slice_access(struct g_provider *pp, int dr, int dw, int de) 9092108Sphk{ 91107953Sphk int error; 92107953Sphk u_int u; 9392108Sphk struct g_geom *gp; 9492108Sphk struct g_consumer *cp; 9592108Sphk struct g_provider *pp2; 9692108Sphk struct g_slicer *gsp; 9792108Sphk struct g_slice *gsl, *gsl2; 9892108Sphk 9992108Sphk gp = pp->geom; 10092108Sphk cp = LIST_FIRST(&gp->consumer); 10192108Sphk KASSERT (cp != NULL, ("g_slice_access but no consumer")); 10292108Sphk gsp = gp->softc; 103131568Sphk if (dr > 0 || dw > 0 || de > 0) { 104131568Sphk gsl = &gsp->slices[pp->index]; 105131568Sphk for (u = 0; u < gsp->nslice; u++) { 106131568Sphk gsl2 = &gsp->slices[u]; 107131568Sphk if (gsl2->length == 0) 108131568Sphk continue; 109131568Sphk if (u == pp->index) 110131568Sphk continue; 111131568Sphk if (gsl->offset + gsl->length <= gsl2->offset) 112131568Sphk continue; 113131568Sphk if (gsl2->offset + gsl2->length <= gsl->offset) 114131568Sphk continue; 115131568Sphk /* overlap */ 116131568Sphk pp2 = gsl2->provider; 117131568Sphk if ((pp->acw + dw) > 0 && pp2->ace > 0) 118131568Sphk return (EPERM); 119131568Sphk if ((pp->ace + de) > 0 && pp2->acw > 0) 120131568Sphk return (EPERM); 121131568Sphk } 12292108Sphk } 12392108Sphk /* On first open, grab an extra "exclusive" bit */ 12492108Sphk if (cp->acr == 0 && cp->acw == 0 && cp->ace == 0) 12592108Sphk de++; 12692108Sphk /* ... and let go of it on last close */ 12792108Sphk if ((cp->acr + dr) == 0 && (cp->acw + dw) == 0 && (cp->ace + de) == 1) 12892108Sphk de--; 129125755Sphk error = g_access(cp, dr, dw, de); 13092108Sphk return (error); 13192108Sphk} 13292108Sphk 133113713Sphk/* 134113713Sphk * XXX: It should be possible to specify here if we should finish all of the 135113713Sphk * XXX: bio, or only the non-hot bits. This would get messy if there were 136113713Sphk * XXX: two hot spots in the same bio, so for now we simply finish off the 137113713Sphk * XXX: entire bio. Modifying hot data on the way to disk is frowned on 138113713Sphk * XXX: so making that considerably harder is not a bad idea anyway. 139113713Sphk */ 140107522Sphkvoid 141107522Sphkg_slice_finish_hot(struct bio *bp) 142107522Sphk{ 143107522Sphk struct bio *bp2; 144107522Sphk struct g_geom *gp; 145107522Sphk struct g_consumer *cp; 146107522Sphk struct g_slicer *gsp; 147107522Sphk struct g_slice *gsl; 148107953Sphk int idx; 149107522Sphk 150113713Sphk KASSERT(bp->bio_to != NULL, 151113713Sphk ("NULL bio_to in g_slice_finish_hot(%p)", bp)); 152113713Sphk KASSERT(bp->bio_from != NULL, 153113713Sphk ("NULL bio_from in g_slice_finish_hot(%p)", bp)); 154107522Sphk gp = bp->bio_to->geom; 155107522Sphk gsp = gp->softc; 156107522Sphk cp = LIST_FIRST(&gp->consumer); 157107522Sphk KASSERT(cp != NULL, ("NULL consumer in g_slice_finish_hot(%p)", bp)); 158107953Sphk idx = bp->bio_to->index; 159107953Sphk gsl = &gsp->slices[idx]; 160107522Sphk 161107522Sphk bp2 = g_clone_bio(bp); 162107522Sphk if (bp2 == NULL) { 163107522Sphk g_io_deliver(bp, ENOMEM); 164107522Sphk return; 165107522Sphk } 166107522Sphk if (bp2->bio_offset + bp2->bio_length > gsl->length) 167107522Sphk bp2->bio_length = gsl->length - bp2->bio_offset; 168107522Sphk bp2->bio_done = g_std_done; 169107522Sphk bp2->bio_offset += gsl->offset; 170107522Sphk g_io_request(bp2, cp); 171107522Sphk return; 172107522Sphk} 173107522Sphk 17493776Sphkstatic void 17592108Sphkg_slice_start(struct bio *bp) 17692108Sphk{ 17792108Sphk struct bio *bp2; 17892108Sphk struct g_provider *pp; 17992108Sphk struct g_geom *gp; 18092108Sphk struct g_consumer *cp; 18192108Sphk struct g_slicer *gsp; 182113712Sphk struct g_slice *gsl; 183113713Sphk struct g_slice_hot *ghp; 184107953Sphk int idx, error; 185107522Sphk u_int m_index; 18694287Sphk off_t t; 18792108Sphk 18892108Sphk pp = bp->bio_to; 18992108Sphk gp = pp->geom; 19092108Sphk gsp = gp->softc; 19192108Sphk cp = LIST_FIRST(&gp->consumer); 192107953Sphk idx = pp->index; 193107953Sphk gsl = &gsp->slices[idx]; 19492108Sphk switch(bp->bio_cmd) { 19592108Sphk case BIO_READ: 19692108Sphk case BIO_WRITE: 19792108Sphk case BIO_DELETE: 19892108Sphk if (bp->bio_offset > gsl->length) { 199104195Sphk g_io_deliver(bp, EINVAL); /* XXX: EWHAT ? */ 20092108Sphk return; 20192108Sphk } 202107522Sphk /* 203107522Sphk * Check if we collide with any hot spaces, and call the 204107522Sphk * method once if so. 205107522Sphk */ 206107832Sphk t = bp->bio_offset + gsl->offset; 207113712Sphk for (m_index = 0; m_index < gsp->nhotspot; m_index++) { 208113713Sphk ghp = &gsp->hotspot[m_index]; 209113713Sphk if (t >= ghp->offset + ghp->length) 210107522Sphk continue; 211113713Sphk if (t + bp->bio_length <= ghp->offset) 212107522Sphk continue; 213113713Sphk switch(bp->bio_cmd) { 214113713Sphk case BIO_READ: idx = ghp->ract; break; 215113713Sphk case BIO_WRITE: idx = ghp->wact; break; 216113713Sphk case BIO_DELETE: idx = ghp->dact; break; 217113713Sphk } 218113713Sphk switch(idx) { 219113713Sphk case G_SLICE_HOT_ALLOW: 220113713Sphk /* Fall out and continue normal processing */ 221113713Sphk continue; 222113713Sphk case G_SLICE_HOT_DENY: 223113713Sphk g_io_deliver(bp, EROFS); 224107522Sphk return; 225113713Sphk case G_SLICE_HOT_START: 226113713Sphk error = gsp->start(bp); 227113713Sphk if (error && error != EJUSTRETURN) 228113713Sphk g_io_deliver(bp, error); 229107522Sphk return; 230113713Sphk case G_SLICE_HOT_CALL: 231113937Sphk error = g_post_event(gsp->hot, bp, M_NOWAIT, 232113937Sphk gp, NULL); 233113713Sphk if (error) 234113713Sphk g_io_deliver(bp, error); 235113713Sphk return; 236107522Sphk } 237107522Sphk break; 238107522Sphk } 23992108Sphk bp2 = g_clone_bio(bp); 240104057Sphk if (bp2 == NULL) { 241104195Sphk g_io_deliver(bp, ENOMEM); 242104057Sphk return; 243104057Sphk } 24492108Sphk if (bp2->bio_offset + bp2->bio_length > gsl->length) 24592108Sphk bp2->bio_length = gsl->length - bp2->bio_offset; 24692108Sphk bp2->bio_done = g_std_done; 24792108Sphk bp2->bio_offset += gsl->offset; 24892108Sphk g_io_request(bp2, cp); 24992108Sphk return; 25092108Sphk case BIO_GETATTR: 25194287Sphk /* Give the real method a chance to override */ 252113878Sphk if (gsp->start != NULL && gsp->start(bp)) 25394287Sphk return; 25495038Sphk if (!strcmp("GEOM::kerneldump", bp->bio_attribute)) { 25595038Sphk struct g_kerneldump *gkd; 25695038Sphk 25795038Sphk gkd = (struct g_kerneldump *)bp->bio_data; 258107953Sphk gkd->offset += gsp->slices[idx].offset; 259107953Sphk if (gkd->length > gsp->slices[idx].length) 260107953Sphk gkd->length = gsp->slices[idx].length; 26195038Sphk /* now, pass it on downwards... */ 26295038Sphk } 26392108Sphk bp2 = g_clone_bio(bp); 264104081Sphk if (bp2 == NULL) { 265104195Sphk g_io_deliver(bp, ENOMEM); 266104081Sphk return; 267104081Sphk } 26892108Sphk bp2->bio_done = g_std_done; 26992108Sphk g_io_request(bp2, cp); 27092108Sphk break; 27192108Sphk default: 272104195Sphk g_io_deliver(bp, EOPNOTSUPP); 27392108Sphk return; 27492108Sphk } 27592108Sphk} 27692108Sphk 27792108Sphkvoid 278107953Sphkg_slice_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 27992108Sphk{ 28092108Sphk struct g_slicer *gsp; 28192108Sphk 28292108Sphk gsp = gp->softc; 283106101Sphk if (indent == NULL) { 284106101Sphk sbuf_printf(sb, " i %u", pp->index); 285106101Sphk sbuf_printf(sb, " o %ju", 286106101Sphk (uintmax_t)gsp->slices[pp->index].offset); 287106101Sphk return; 288106101Sphk } 28992108Sphk if (pp != NULL) { 29092108Sphk sbuf_printf(sb, "%s<index>%u</index>\n", indent, pp->index); 291105540Sphk sbuf_printf(sb, "%s<length>%ju</length>\n", 292105540Sphk indent, (uintmax_t)gsp->slices[pp->index].length); 293105540Sphk sbuf_printf(sb, "%s<seclength>%ju</seclength>\n", indent, 294105540Sphk (uintmax_t)gsp->slices[pp->index].length / 512); 295105540Sphk sbuf_printf(sb, "%s<offset>%ju</offset>\n", indent, 296105540Sphk (uintmax_t)gsp->slices[pp->index].offset); 297105540Sphk sbuf_printf(sb, "%s<secoffset>%ju</secoffset>\n", indent, 298105540Sphk (uintmax_t)gsp->slices[pp->index].offset / 512); 29992108Sphk } 30092108Sphk} 30192108Sphk 302104064Sphkint 303107953Sphkg_slice_config(struct g_geom *gp, u_int idx, int how, off_t offset, off_t length, u_int sectorsize, const char *fmt, ...) 304104064Sphk{ 305110710Sphk struct g_provider *pp, *pp2; 306104064Sphk struct g_slicer *gsp; 307104064Sphk struct g_slice *gsl; 308104064Sphk va_list ap; 309104064Sphk struct sbuf *sb; 310115506Sphk int acc; 311104064Sphk 312104195Sphk g_trace(G_T_TOPOLOGY, "g_slice_config(%s, %d, %d)", 313107953Sphk gp->name, idx, how); 314104064Sphk g_topology_assert(); 315104064Sphk gsp = gp->softc; 316107953Sphk if (idx >= gsp->nslice) 317104064Sphk return(EINVAL); 318107953Sphk gsl = &gsp->slices[idx]; 319104064Sphk pp = gsl->provider; 320104064Sphk if (pp != NULL) 321104064Sphk acc = pp->acr + pp->acw + pp->ace; 322104064Sphk else 323104064Sphk acc = 0; 324104064Sphk if (acc != 0 && how != G_SLICE_CONFIG_FORCE) { 325104064Sphk if (length < gsl->length) 326104064Sphk return(EBUSY); 327104064Sphk if (offset != gsl->offset) 328104064Sphk return(EBUSY); 329104064Sphk } 330104064Sphk /* XXX: check offset + length <= MEDIASIZE */ 331104064Sphk if (how == G_SLICE_CONFIG_CHECK) 332104064Sphk return (0); 333104064Sphk gsl->length = length; 334104064Sphk gsl->offset = offset; 335105542Sphk gsl->sectorsize = sectorsize; 336105957Sphk if (length == 0) { 337105957Sphk if (pp == NULL) 338105957Sphk return (0); 339105957Sphk if (bootverbose) 340105957Sphk printf("GEOM: Deconfigure %s\n", pp->name); 341157619Smarcel g_wither_provider(pp, ENXIO); 342104064Sphk gsl->provider = NULL; 343104064Sphk gsp->nprovider--; 344104064Sphk return (0); 345104064Sphk } 346105957Sphk if (pp != NULL) { 347105957Sphk if (bootverbose) 348105957Sphk printf("GEOM: Reconfigure %s, start %jd length %jd end %jd\n", 349105957Sphk pp->name, (intmax_t)offset, (intmax_t)length, 350105957Sphk (intmax_t)(offset + length - 1)); 351107116Sphk pp->mediasize = gsl->length; 352105957Sphk return (0); 353105957Sphk } 354115949Sphk sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND); 355104064Sphk va_start(ap, fmt); 356104064Sphk sbuf_vprintf(sb, fmt, ap); 357115949Sphk va_end(ap); 358104064Sphk sbuf_finish(sb); 359104064Sphk pp = g_new_providerf(gp, sbuf_data(sb)); 360110710Sphk pp2 = LIST_FIRST(&gp->consumer)->provider; 361110710Sphk pp->flags = pp2->flags & G_PF_CANDELETE; 362110713Sphk if (pp2->stripesize > 0) { 363110713Sphk pp->stripesize = pp2->stripesize; 364110713Sphk pp->stripeoffset = (pp2->stripeoffset + offset) % pp->stripesize; 365110713Sphk } 366137149Sphk if (0 && bootverbose) 367105957Sphk printf("GEOM: Configure %s, start %jd length %jd end %jd\n", 368105957Sphk pp->name, (intmax_t)offset, (intmax_t)length, 369105957Sphk (intmax_t)(offset + length - 1)); 370107953Sphk pp->index = idx; 371105542Sphk pp->mediasize = gsl->length; 372105542Sphk pp->sectorsize = gsl->sectorsize; 373104064Sphk gsl->provider = pp; 374104064Sphk gsp->nprovider++; 375104064Sphk g_error_provider(pp, 0); 376104064Sphk sbuf_delete(sb); 377104064Sphk return(0); 378104064Sphk} 379104064Sphk 380113713Sphk/* 381113713Sphk * Configure "hotspots". A hotspot is a piece of the parent device which 382113713Sphk * this particular slicer cares about for some reason. Typically because 383113713Sphk * it contains meta-data used to configure the slicer. 384113713Sphk * A hotspot is identified by its index number. The offset and length are 385113713Sphk * relative to the parent device, and the three "?act" fields specify 386113713Sphk * what action to take on BIO_READ, BIO_DELETE and BIO_WRITE. 387113713Sphk * 388113713Sphk * XXX: There may be a race relative to g_slice_start() here, if an existing 389113713Sphk * XXX: hotspot is changed wile I/O is happening. Should this become a problem 390113713Sphk * XXX: we can protect the hotspot stuff with a mutex. 391113713Sphk */ 392113713Sphk 393107522Sphkint 394113713Sphkg_slice_conf_hot(struct g_geom *gp, u_int idx, off_t offset, off_t length, int ract, int dact, int wact) 395107522Sphk{ 396107522Sphk struct g_slicer *gsp; 397113712Sphk struct g_slice_hot *gsl, *gsl2; 398107522Sphk 399113713Sphk g_trace(G_T_TOPOLOGY, "g_slice_conf_hot(%s, idx: %d, off: %jd, len: %jd)", 400113713Sphk gp->name, idx, (intmax_t)offset, (intmax_t)length); 401107522Sphk g_topology_assert(); 402107522Sphk gsp = gp->softc; 403113712Sphk gsl = gsp->hotspot; 404113712Sphk if(idx >= gsp->nhotspot) { 405111119Simp gsl2 = g_malloc((idx + 1) * sizeof *gsl2, M_WAITOK | M_ZERO); 406113712Sphk if (gsp->hotspot != NULL) 407113712Sphk bcopy(gsp->hotspot, gsl2, gsp->nhotspot * sizeof *gsl2); 408113712Sphk gsp->hotspot = gsl2; 409113712Sphk if (gsp->hotspot != NULL) 410107522Sphk g_free(gsl); 411107522Sphk gsl = gsl2; 412113712Sphk gsp->nhotspot = idx + 1; 413107522Sphk } 414107953Sphk gsl[idx].offset = offset; 415107953Sphk gsl[idx].length = length; 416113878Sphk KASSERT(!((ract | dact | wact) & G_SLICE_HOT_START) 417113878Sphk || gsp->start != NULL, ("G_SLICE_HOT_START but no slice->start")); 418113878Sphk /* XXX: check that we _have_ a start function if HOT_START specified */ 419113713Sphk gsl[idx].ract = ract; 420113713Sphk gsl[idx].dact = dact; 421113713Sphk gsl[idx].wact = wact; 422107522Sphk return (0); 423107522Sphk} 424107522Sphk 425114504Sphkvoid 426114504Sphkg_slice_spoiled(struct g_consumer *cp) 427114504Sphk{ 428114504Sphk struct g_geom *gp; 429114504Sphk struct g_slicer *gsp; 430114504Sphk 431114504Sphk g_topology_assert(); 432114504Sphk gp = cp->geom; 433114504Sphk g_trace(G_T_TOPOLOGY, "g_slice_spoiled(%p/%s)", cp, gp->name); 434114504Sphk gsp = gp->softc; 435114504Sphk gp->softc = NULL; 436114504Sphk g_slice_free(gsp); 437114504Sphk g_wither_geom(gp, ENXIO); 438114504Sphk} 439114504Sphk 440115506Sphkint 441115506Sphkg_slice_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp) 442115506Sphk{ 443115506Sphk 444115506Sphk g_slice_spoiled(LIST_FIRST(&gp->consumer)); 445115506Sphk return (0); 446115506Sphk} 447115506Sphk 44892108Sphkstruct g_geom * 449107522Sphkg_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) 45092108Sphk{ 45192108Sphk struct g_geom *gp; 45292108Sphk struct g_slicer *gsp; 45392108Sphk struct g_consumer *cp; 45492108Sphk void **vp; 455113390Sphk int error; 45692108Sphk 45792108Sphk g_topology_assert(); 45892108Sphk vp = (void **)extrap; 45992108Sphk gp = g_new_geomf(mp, "%s", pp->name); 460114493Sphk gsp = g_slice_alloc(slices, extra); 46192108Sphk gsp->start = start; 46293776Sphk gp->access = g_slice_access; 46393776Sphk gp->orphan = g_slice_orphan; 46492108Sphk gp->softc = gsp; 46592108Sphk gp->start = g_slice_start; 466114504Sphk gp->spoiled = g_slice_spoiled; 467133986Sphk if (gp->dumpconf == NULL) 468133986Sphk gp->dumpconf = g_slice_dumpconf; 469115506Sphk if (gp->class->destroy_geom == NULL) 470115506Sphk gp->class->destroy_geom = g_slice_destroy_geom; 47192108Sphk cp = g_new_consumer(gp); 472105551Sphk error = g_attach(cp, pp); 473105551Sphk if (error == 0) 474125755Sphk error = g_access(cp, 1, 0, 0); 47592108Sphk if (error) { 476114504Sphk g_wither_geom(gp, ENXIO); 47792108Sphk return (NULL); 47892108Sphk } 479131046Spjd if (extrap != NULL) 480131046Spjd *vp = gsp->softc; 48192108Sphk *cpp = cp; 48292108Sphk return (gp); 48392108Sphk} 48492108Sphk 485155802Spjdvoid 48693250Sphkg_slice_orphan(struct g_consumer *cp) 48792108Sphk{ 48892108Sphk 48992108Sphk g_trace(G_T_TOPOLOGY, "g_slice_orphan(%p/%s)", cp, cp->provider->name); 49092108Sphk g_topology_assert(); 49192108Sphk KASSERT(cp->provider->error != 0, 49292108Sphk ("g_slice_orphan with error == 0")); 49392108Sphk 494107522Sphk /* XXX: Not good enough we leak the softc and its suballocations */ 495114504Sphk g_slice_free(cp->geom->softc); 496114504Sphk g_wither_geom(cp->geom, cp->provider->error); 49792108Sphk} 498