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: stable/11/sys/geom/geom_disk.c 356589 2020-01-10 00:55:37Z mav $"); 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> 46298420Sasomers#include <sys/bus.h> 47196823Spjd#include <sys/ctype.h> 48110119Sphk#include <sys/fcntl.h> 4992108Sphk#include <sys/malloc.h> 50223921Sae#include <sys/sbuf.h> 51111979Sphk#include <sys/devicestat.h> 5292108Sphk#include <machine/md_var.h> 5392108Sphk 5492108Sphk#include <sys/lock.h> 5592108Sphk#include <sys/mutex.h> 5692108Sphk#include <geom/geom.h> 57112952Sphk#include <geom/geom_disk.h> 58112476Sphk#include <geom/geom_int.h> 5992108Sphk 60219970Smav#include <dev/led/led.h> 61219970Smav 62291716Sken#include <machine/bus.h> 63291716Sken 64219970Smavstruct g_disk_softc { 65248694Smav struct mtx done_mtx; 66219970Smav struct disk *dp; 67356589Smav struct devstat *d_devstat; 68219970Smav struct sysctl_ctx_list sysctl_ctx; 69219970Smav struct sysctl_oid *sysctl_tree; 70219970Smav char led[64]; 71219970Smav uint32_t state; 72256880Smav struct mtx start_mtx; 73219970Smav}; 74219970Smav 7592108Sphkstatic g_access_t g_disk_access; 76133314Sphkstatic g_start_t g_disk_start; 77133314Sphkstatic g_ioctl_t g_disk_ioctl; 78133314Sphkstatic g_dumpconf_t g_disk_dumpconf; 79237518Skenstatic g_provgone_t g_disk_providergone; 8092108Sphk 81141624Sphkstatic struct g_class g_disk_class = { 82249507Sivoras .name = G_DISK_CLASS_NAME, 83133318Sphk .version = G_VERSION, 84133314Sphk .start = g_disk_start, 85133314Sphk .access = g_disk_access, 86133314Sphk .ioctl = g_disk_ioctl, 87237518Sken .providergone = g_disk_providergone, 88133314Sphk .dumpconf = g_disk_dumpconf, 8992108Sphk}; 9092108Sphk 91219970SmavSYSCTL_DECL(_kern_geom); 92227309Sedstatic SYSCTL_NODE(_kern_geom, OID_AUTO, disk, CTLFLAG_RW, 0, 93227309Sed "GEOM_DISK stuff"); 94219970Smav 95115473SphkDECLARE_GEOM_CLASS(g_disk_class, g_disk); 96115473Sphk 9792108Sphkstatic int 9892108Sphkg_disk_access(struct g_provider *pp, int r, int w, int e) 9992108Sphk{ 10092108Sphk struct disk *dp; 101219970Smav struct g_disk_softc *sc; 10292108Sphk int error; 10392108Sphk 10492108Sphk g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 10592108Sphk pp->name, r, w, e); 10692108Sphk g_topology_assert(); 107248694Smav sc = pp->private; 108219970Smav if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 109125539Spjd /* 110125539Spjd * Allow decreasing access count even if disk is not 111298808Spfg * available anymore. 112125539Spjd */ 113125539Spjd if (r <= 0 && w <= 0 && e <= 0) 114125539Spjd return (0); 115125975Sphk return (ENXIO); 116125539Spjd } 11792108Sphk r += pp->acr; 11892108Sphk w += pp->acw; 11992108Sphk e += pp->ace; 120110119Sphk error = 0; 12192108Sphk if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 122329316Savg /* 123329316Savg * It would be better to defer this decision to d_open if 124329316Savg * it was able to take flags. 125329316Savg */ 126329316Savg if (w > 0 && (dp->d_flags & DISKFLAG_WRITE_PROTECT) != 0) 127329316Savg error = EROFS; 128329316Savg if (error == 0 && dp->d_open != NULL) 129111668Sphk error = dp->d_open(dp); 130329316Savg if (bootverbose && error != 0) 131329316Savg printf("Opened disk %s -> %d\n", pp->name, error); 132329316Savg if (error != 0) 133329316Savg return (error); 134105551Sphk pp->sectorsize = dp->d_sectorsize; 135110727Sphk if (dp->d_maxsize == 0) { 136110727Sphk printf("WARNING: Disk drive %s%d has no d_maxsize\n", 137110727Sphk dp->d_name, dp->d_unit); 138110727Sphk dp->d_maxsize = DFLTPHYS; 139110727Sphk } 140252657Ssmh if (dp->d_delmaxsize == 0) { 141252657Ssmh if (bootverbose && dp->d_flags & DISKFLAG_CANDELETE) { 142252657Ssmh printf("WARNING: Disk drive %s%d has no " 143252657Ssmh "d_delmaxsize\n", dp->d_name, dp->d_unit); 144249940Ssmh } 145252657Ssmh dp->d_delmaxsize = dp->d_maxsize; 146249940Ssmh } 147249940Ssmh pp->stripeoffset = dp->d_stripeoffset; 148249940Ssmh pp->stripesize = dp->d_stripesize; 149249940Ssmh dp->d_flags |= DISKFLAG_OPEN; 150306476Sae /* 151306476Sae * Do not invoke resize event when initial size was zero. 152306476Sae * Some disks report its size only after first opening. 153306476Sae */ 154306476Sae if (pp->mediasize == 0) 155306476Sae pp->mediasize = dp->d_mediasize; 156306476Sae else 157306476Sae g_resize_provider(pp, dp->d_mediasize); 15892108Sphk } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 159111668Sphk if (dp->d_close != NULL) { 160111668Sphk error = dp->d_close(dp); 161110119Sphk if (error != 0) 162110119Sphk printf("Closed disk %s -> %d\n", 163110119Sphk pp->name, error); 164110119Sphk } 165219970Smav sc->state = G_STATE_ACTIVE; 166219970Smav if (sc->led[0] != 0) 167219970Smav led_set(sc->led, "0"); 168110119Sphk dp->d_flags &= ~DISKFLAG_OPEN; 16992108Sphk } 17092108Sphk return (error); 17192108Sphk} 17292108Sphk 17392108Sphkstatic void 17495038Sphkg_disk_kerneldump(struct bio *bp, struct disk *dp) 175219950Smav{ 17695038Sphk struct g_kerneldump *gkd; 177104450Sphk struct g_geom *gp; 17895038Sphk 17995038Sphk gkd = (struct g_kerneldump*)bp->bio_data; 180104450Sphk gp = bp->bio_to->geom; 181264320Sbdrewery g_trace(G_T_TOPOLOGY, "g_disk_kerneldump(%s, %jd, %jd)", 182104450Sphk gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 183120572Sphk if (dp->d_dump == NULL) { 184120572Sphk g_io_deliver(bp, ENODEV); 185120572Sphk return; 186120572Sphk } 187219950Smav gkd->di.dumper = dp->d_dump; 188219950Smav gkd->di.priv = dp; 189219950Smav gkd->di.blocksize = dp->d_sectorsize; 190219950Smav gkd->di.maxiosize = dp->d_maxsize; 191219950Smav gkd->di.mediaoffset = gkd->offset; 192140968Sphk if ((gkd->offset + gkd->length) > dp->d_mediasize) 193140968Sphk gkd->length = dp->d_mediasize - gkd->offset; 194219950Smav gkd->di.mediasize = gkd->length; 195219950Smav g_io_deliver(bp, 0); 19695038Sphk} 19795038Sphk 19895038Sphkstatic void 199219970Smavg_disk_setstate(struct bio *bp, struct g_disk_softc *sc) 200219970Smav{ 201219970Smav const char *cmd; 202219970Smav 203219970Smav memcpy(&sc->state, bp->bio_data, sizeof(sc->state)); 204219970Smav if (sc->led[0] != 0) { 205219970Smav switch (sc->state) { 206219970Smav case G_STATE_FAILED: 207219970Smav cmd = "1"; 208219970Smav break; 209219970Smav case G_STATE_REBUILD: 210219970Smav cmd = "f5"; 211219970Smav break; 212219970Smav case G_STATE_RESYNC: 213219970Smav cmd = "f1"; 214219970Smav break; 215219970Smav default: 216219970Smav cmd = "0"; 217219970Smav break; 218219970Smav } 219219970Smav led_set(sc->led, cmd); 220219970Smav } 221219970Smav g_io_deliver(bp, 0); 222219970Smav} 223219970Smav 224219970Smavstatic void 22592108Sphkg_disk_done(struct bio *bp) 22692108Sphk{ 227256603Smav struct bintime now; 228111979Sphk struct bio *bp2; 229219970Smav struct g_disk_softc *sc; 23092108Sphk 231110720Sphk /* See "notes" for why we need a mutex here */ 232356589Smav sc = bp->bio_caller1; 233248694Smav bp2 = bp->bio_parent; 234256603Smav binuptime(&now); 235248694Smav mtx_lock(&sc->done_mtx); 236111979Sphk if (bp2->bio_error == 0) 237111979Sphk bp2->bio_error = bp->bio_error; 238356589Smav bp2->bio_completed += bp->bio_length - bp->bio_resid; 239300207Sken 240296605Simp switch (bp->bio_cmd) { 241300207Sken case BIO_ZONE: 242300207Sken bcopy(&bp->bio_zone, &bp2->bio_zone, sizeof(bp->bio_zone)); 243300207Sken /*FALLTHROUGH*/ 244296605Simp case BIO_READ: 245296605Simp case BIO_WRITE: 246296605Simp case BIO_DELETE: 247296605Simp case BIO_FLUSH: 248356589Smav devstat_end_transaction_bio_bt(sc->d_devstat, bp, &now); 249296605Simp break; 250296605Simp default: 251296605Simp break; 252296605Simp } 253111979Sphk bp2->bio_inbed++; 254111979Sphk if (bp2->bio_children == bp2->bio_inbed) { 255256606Smav mtx_unlock(&sc->done_mtx); 256112259Sphk bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed; 257111979Sphk g_io_deliver(bp2, bp2->bio_error); 258256606Smav } else 259256606Smav mtx_unlock(&sc->done_mtx); 260256606Smav g_destroy_bio(bp); 26192108Sphk} 26292108Sphk 263119660Sphkstatic int 264138732Sphkg_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td) 265119660Sphk{ 266119660Sphk struct disk *dp; 267219970Smav struct g_disk_softc *sc; 268119660Sphk int error; 269119660Sphk 270248694Smav sc = pp->private; 271219970Smav dp = sc->dp; 272119660Sphk 273119660Sphk if (dp->d_ioctl == NULL) 274119660Sphk return (ENOIOCTL); 275138732Sphk error = dp->d_ioctl(dp, cmd, data, fflag, td); 276226736Spjd return (error); 277119660Sphk} 278119660Sphk 279291741Skenstatic off_t 280291741Skeng_disk_maxsize(struct disk *dp, struct bio *bp) 281291741Sken{ 282291741Sken if (bp->bio_cmd == BIO_DELETE) 283291741Sken return (dp->d_delmaxsize); 284291741Sken return (dp->d_maxsize); 285291741Sken} 286291741Sken 287291716Skenstatic int 288291741Skeng_disk_maxsegs(struct disk *dp, struct bio *bp) 289291716Sken{ 290291741Sken return ((g_disk_maxsize(dp, bp) / PAGE_SIZE) + 1); 291291716Sken} 292291716Sken 29392108Sphkstatic void 294291716Skeng_disk_advance(struct disk *dp, struct bio *bp, off_t off) 295291716Sken{ 296291716Sken 297291716Sken bp->bio_offset += off; 298291716Sken bp->bio_length -= off; 299291716Sken 300291716Sken if ((bp->bio_flags & BIO_VLIST) != 0) { 301291716Sken bus_dma_segment_t *seg, *end; 302291716Sken 303291716Sken seg = (bus_dma_segment_t *)bp->bio_data; 304291716Sken end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n; 305291716Sken off += bp->bio_ma_offset; 306291716Sken while (off >= seg->ds_len) { 307291716Sken KASSERT((seg != end), 308291716Sken ("vlist request runs off the end")); 309291716Sken off -= seg->ds_len; 310291716Sken seg++; 311291716Sken } 312291716Sken bp->bio_ma_offset = off; 313291716Sken bp->bio_ma_n = end - seg; 314291716Sken bp->bio_data = (void *)seg; 315291716Sken } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 316291716Sken bp->bio_ma += off / PAGE_SIZE; 317291716Sken bp->bio_ma_offset += off; 318291716Sken bp->bio_ma_offset %= PAGE_SIZE; 319291716Sken bp->bio_ma_n -= off / PAGE_SIZE; 320291716Sken } else { 321291716Sken bp->bio_data += off; 322291716Sken } 323291716Sken} 324291716Sken 325291716Skenstatic void 326291716Skeng_disk_seg_limit(bus_dma_segment_t *seg, off_t *poffset, 327291716Sken off_t *plength, int *ppages) 328291716Sken{ 329291716Sken uintptr_t seg_page_base; 330291716Sken uintptr_t seg_page_end; 331291716Sken off_t offset; 332291716Sken off_t length; 333291716Sken int seg_pages; 334291716Sken 335291716Sken offset = *poffset; 336291716Sken length = *plength; 337291716Sken 338291716Sken if (length > seg->ds_len - offset) 339291716Sken length = seg->ds_len - offset; 340291716Sken 341291716Sken seg_page_base = trunc_page(seg->ds_addr + offset); 342291716Sken seg_page_end = round_page(seg->ds_addr + offset + length); 343291716Sken seg_pages = (seg_page_end - seg_page_base) >> PAGE_SHIFT; 344291716Sken 345291716Sken if (seg_pages > *ppages) { 346291716Sken seg_pages = *ppages; 347291716Sken length = (seg_page_base + (seg_pages << PAGE_SHIFT)) - 348291716Sken (seg->ds_addr + offset); 349291716Sken } 350291716Sken 351291716Sken *poffset = 0; 352291716Sken *plength -= length; 353291716Sken *ppages -= seg_pages; 354291716Sken} 355291716Sken 356291716Skenstatic off_t 357291716Skeng_disk_vlist_limit(struct disk *dp, struct bio *bp, bus_dma_segment_t **pendseg) 358291716Sken{ 359291716Sken bus_dma_segment_t *seg, *end; 360291716Sken off_t residual; 361291716Sken off_t offset; 362291716Sken int pages; 363291716Sken 364291716Sken seg = (bus_dma_segment_t *)bp->bio_data; 365291716Sken end = (bus_dma_segment_t *)bp->bio_data + bp->bio_ma_n; 366291716Sken residual = bp->bio_length; 367291716Sken offset = bp->bio_ma_offset; 368291741Sken pages = g_disk_maxsegs(dp, bp); 369291716Sken while (residual != 0 && pages != 0) { 370291716Sken KASSERT((seg != end), 371291716Sken ("vlist limit runs off the end")); 372291716Sken g_disk_seg_limit(seg, &offset, &residual, &pages); 373291716Sken seg++; 374291716Sken } 375291716Sken if (pendseg != NULL) 376291716Sken *pendseg = seg; 377291716Sken return (residual); 378291716Sken} 379291716Sken 380291716Skenstatic bool 381291716Skeng_disk_limit(struct disk *dp, struct bio *bp) 382291716Sken{ 383291716Sken bool limited = false; 384291742Sken off_t maxsz; 385291716Sken 386291742Sken maxsz = g_disk_maxsize(dp, bp); 387291742Sken 388291716Sken /* 389291716Sken * XXX: If we have a stripesize we should really use it here. 390291716Sken * Care should be taken in the delete case if this is done 391291716Sken * as deletes can be very sensitive to size given how they 392291716Sken * are processed. 393291716Sken */ 394291741Sken if (bp->bio_length > maxsz) { 395291741Sken bp->bio_length = maxsz; 396291716Sken limited = true; 397291716Sken } 398291716Sken 399291716Sken if ((bp->bio_flags & BIO_VLIST) != 0) { 400291716Sken bus_dma_segment_t *firstseg, *endseg; 401291716Sken off_t residual; 402291716Sken 403291716Sken firstseg = (bus_dma_segment_t*)bp->bio_data; 404291716Sken residual = g_disk_vlist_limit(dp, bp, &endseg); 405291716Sken if (residual != 0) { 406291716Sken bp->bio_ma_n = endseg - firstseg; 407291716Sken bp->bio_length -= residual; 408291716Sken limited = true; 409291716Sken } 410291716Sken } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 411291716Sken bp->bio_ma_n = 412291716Sken howmany(bp->bio_ma_offset + bp->bio_length, PAGE_SIZE); 413291716Sken } 414291716Sken 415291716Sken return (limited); 416291716Sken} 417291716Sken 418291716Skenstatic void 41992108Sphkg_disk_start(struct bio *bp) 42092108Sphk{ 421110720Sphk struct bio *bp2, *bp3; 42292108Sphk struct disk *dp; 423219970Smav struct g_disk_softc *sc; 42492403Sphk int error; 425273638Smav off_t off; 42692108Sphk 427248694Smav sc = bp->bio_to->private; 428219970Smav if (sc == NULL || (dp = sc->dp) == NULL || dp->d_destroyed) { 429115214Sphk g_io_deliver(bp, ENXIO); 430143791Sphk return; 431143791Sphk } 432104609Sphk error = EJUSTRETURN; 43392108Sphk switch(bp->bio_cmd) { 434104609Sphk case BIO_DELETE: 435110119Sphk if (!(dp->d_flags & DISKFLAG_CANDELETE)) { 436226737Spjd error = EOPNOTSUPP; 437104609Sphk break; 438104609Sphk } 439104609Sphk /* fall-through */ 44092108Sphk case BIO_READ: 44192108Sphk case BIO_WRITE: 442291716Sken KASSERT((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0 || 443291716Sken (bp->bio_flags & BIO_UNMAPPED) == 0, 444291716Sken ("unmapped bio not supported by disk %s", dp->d_name)); 445110720Sphk off = 0; 446110720Sphk bp3 = NULL; 44792108Sphk bp2 = g_clone_bio(bp); 448110477Sphk if (bp2 == NULL) { 449110477Sphk error = ENOMEM; 450110477Sphk break; 451110477Sphk } 452291716Sken for (;;) { 453291716Sken if (g_disk_limit(dp, bp2)) { 454291716Sken off += bp2->bio_length; 455273638Smav 456110720Sphk /* 457110720Sphk * To avoid a race, we need to grab the next bio 458110720Sphk * before we schedule this one. See "notes". 459110720Sphk */ 460110720Sphk bp3 = g_clone_bio(bp); 461110720Sphk if (bp3 == NULL) 462110720Sphk bp->bio_error = ENOMEM; 463110720Sphk } 464110720Sphk bp2->bio_done = g_disk_done; 465356589Smav bp2->bio_caller1 = sc; 466110720Sphk bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 467110720Sphk bp2->bio_bcount = bp2->bio_length; 468110720Sphk bp2->bio_disk = dp; 469256880Smav mtx_lock(&sc->start_mtx); 470150759Stegge devstat_start_transaction_bio(dp->d_devstat, bp2); 471256880Smav mtx_unlock(&sc->start_mtx); 472110720Sphk dp->d_strategy(bp2); 473291716Sken 474291716Sken if (bp3 == NULL) 475291716Sken break; 476291716Sken 477110720Sphk bp2 = bp3; 478110720Sphk bp3 = NULL; 479291716Sken g_disk_advance(dp, bp2, off); 480291716Sken } 48192108Sphk break; 48292108Sphk case BIO_GETATTR: 483223089Sgibbs /* Give the driver a chance to override */ 484223089Sgibbs if (dp->d_getattr != NULL) { 485223089Sgibbs if (bp->bio_disk == NULL) 486223089Sgibbs bp->bio_disk = dp; 487223089Sgibbs error = dp->d_getattr(bp); 488223089Sgibbs if (error != -1) 489223089Sgibbs break; 490223089Sgibbs error = EJUSTRETURN; 491223089Sgibbs } 492216794Skib if (g_handleattr_int(bp, "GEOM::candelete", 493216794Skib (dp->d_flags & DISKFLAG_CANDELETE) != 0)) 49492403Sphk break; 495216794Skib else if (g_handleattr_int(bp, "GEOM::fwsectors", 496216794Skib dp->d_fwsectors)) 497216794Skib break; 498103714Sphk else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 49992403Sphk break; 50098066Sphk else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 50194287Sphk break; 502169285Spjd else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident)) 503169285Spjd break; 504321290Smav else if (g_handleattr_str(bp, "GEOM::descr", dp->d_descr)) 505321290Smav break; 506256956Ssmh else if (g_handleattr_uint16_t(bp, "GEOM::hba_vendor", 507256956Ssmh dp->d_hba_vendor)) 508210471Smav break; 509256956Ssmh else if (g_handleattr_uint16_t(bp, "GEOM::hba_device", 510256956Ssmh dp->d_hba_device)) 511210471Smav break; 512256956Ssmh else if (g_handleattr_uint16_t(bp, "GEOM::hba_subvendor", 513256956Ssmh dp->d_hba_subvendor)) 514210471Smav break; 515256956Ssmh else if (g_handleattr_uint16_t(bp, "GEOM::hba_subdevice", 516256956Ssmh dp->d_hba_subdevice)) 517210471Smav break; 51895038Sphk else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 51995038Sphk g_disk_kerneldump(bp, dp); 520219970Smav else if (!strcmp(bp->bio_attribute, "GEOM::setstate")) 521219970Smav g_disk_setstate(bp, sc); 522256956Ssmh else if (g_handleattr_uint16_t(bp, "GEOM::rotation_rate", 523256956Ssmh dp->d_rotation_rate)) 524256956Ssmh break; 525119660Sphk else 52692403Sphk error = ENOIOCTL; 52792403Sphk break; 528163833Spjd case BIO_FLUSH: 529240629Savg g_trace(G_T_BIO, "g_disk_flushcache(%s)", 530163833Spjd bp->bio_to->name); 531163833Spjd if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) { 532226737Spjd error = EOPNOTSUPP; 533226737Spjd break; 534163833Spjd } 535300207Sken /*FALLTHROUGH*/ 536300207Sken case BIO_ZONE: 537300207Sken if (bp->bio_cmd == BIO_ZONE) { 538300207Sken if (!(dp->d_flags & DISKFLAG_CANZONE)) { 539300207Sken error = EOPNOTSUPP; 540300207Sken break; 541300207Sken } 542300207Sken g_trace(G_T_BIO, "g_disk_zone(%s)", 543300207Sken bp->bio_to->name); 544300207Sken } 545273638Smav bp2 = g_clone_bio(bp); 546273638Smav if (bp2 == NULL) { 547273638Smav g_io_deliver(bp, ENOMEM); 548273638Smav return; 549273638Smav } 550273638Smav bp2->bio_done = g_disk_done; 551356589Smav bp2->bio_caller1 = sc; 552273638Smav bp2->bio_disk = dp; 553273638Smav mtx_lock(&sc->start_mtx); 554273638Smav devstat_start_transaction_bio(dp->d_devstat, bp2); 555273638Smav mtx_unlock(&sc->start_mtx); 556273638Smav dp->d_strategy(bp2); 557163833Spjd break; 55892108Sphk default: 55992403Sphk error = EOPNOTSUPP; 56092403Sphk break; 56192403Sphk } 562104609Sphk if (error != EJUSTRETURN) 563104195Sphk g_io_deliver(bp, error); 56492403Sphk return; 56592108Sphk} 56692108Sphk 567104936Sphkstatic void 568107953Sphkg_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp) 569105537Sphk{ 570251654Smav struct bio *bp; 571105537Sphk struct disk *dp; 572219970Smav struct g_disk_softc *sc; 573251654Smav char *buf; 574251654Smav int res = 0; 575105537Sphk 576219970Smav sc = gp->softc; 577219970Smav if (sc == NULL || (dp = sc->dp) == NULL) 578120374Sphk return; 579106101Sphk if (indent == NULL) { 580106101Sphk sbuf_printf(sb, " hd %u", dp->d_fwheads); 581106101Sphk sbuf_printf(sb, " sc %u", dp->d_fwsectors); 582106101Sphk return; 583106101Sphk } 584105539Sphk if (pp != NULL) { 585105537Sphk sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", 586105537Sphk indent, dp->d_fwheads); 587105537Sphk sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", 588105537Sphk indent, dp->d_fwsectors); 589294042Srpokala 590294042Srpokala /* 591294042Srpokala * "rotationrate" is a little complicated, because the value 592294042Srpokala * returned by the drive might not be the RPM; 0 and 1 are 593294042Srpokala * special cases, and there's also a valid range. 594294042Srpokala */ 595294042Srpokala sbuf_printf(sb, "%s<rotationrate>", indent); 596312405Smav if (dp->d_rotation_rate == DISK_RR_UNKNOWN) /* Old drives */ 597312405Smav sbuf_printf(sb, "unknown"); /* don't report RPM. */ 598312405Smav else if (dp->d_rotation_rate == DISK_RR_NON_ROTATING) 599312405Smav sbuf_printf(sb, "0"); 600312405Smav else if ((dp->d_rotation_rate >= DISK_RR_MIN) && 601312405Smav (dp->d_rotation_rate <= DISK_RR_MAX)) 602294042Srpokala sbuf_printf(sb, "%u", dp->d_rotation_rate); 603294042Srpokala else 604294042Srpokala sbuf_printf(sb, "invalid"); 605294042Srpokala sbuf_printf(sb, "</rotationrate>\n"); 606251654Smav if (dp->d_getattr != NULL) { 607251654Smav buf = g_malloc(DISK_IDENT_SIZE, M_WAITOK); 608251654Smav bp = g_alloc_bio(); 609251654Smav bp->bio_disk = dp; 610251654Smav bp->bio_attribute = "GEOM::ident"; 611251654Smav bp->bio_length = DISK_IDENT_SIZE; 612251654Smav bp->bio_data = buf; 613251654Smav res = dp->d_getattr(bp); 614258683Smav sbuf_printf(sb, "%s<ident>", indent); 615258683Smav g_conf_printf_escaped(sb, "%s", 616251654Smav res == 0 ? buf: dp->d_ident); 617258683Smav sbuf_printf(sb, "</ident>\n"); 618251654Smav bp->bio_attribute = "GEOM::lunid"; 619251654Smav bp->bio_length = DISK_IDENT_SIZE; 620251654Smav bp->bio_data = buf; 621258683Smav if (dp->d_getattr(bp) == 0) { 622258683Smav sbuf_printf(sb, "%s<lunid>", indent); 623258683Smav g_conf_printf_escaped(sb, "%s", buf); 624258683Smav sbuf_printf(sb, "</lunid>\n"); 625258683Smav } 626254766Smav bp->bio_attribute = "GEOM::lunname"; 627254766Smav bp->bio_length = DISK_IDENT_SIZE; 628254766Smav bp->bio_data = buf; 629258683Smav if (dp->d_getattr(bp) == 0) { 630258683Smav sbuf_printf(sb, "%s<lunname>", indent); 631258683Smav g_conf_printf_escaped(sb, "%s", buf); 632258683Smav sbuf_printf(sb, "</lunname>\n"); 633258683Smav } 634251654Smav g_destroy_bio(bp); 635251654Smav g_free(buf); 636258683Smav } else { 637258683Smav sbuf_printf(sb, "%s<ident>", indent); 638258683Smav g_conf_printf_escaped(sb, "%s", dp->d_ident); 639258683Smav sbuf_printf(sb, "</ident>\n"); 640258683Smav } 641258683Smav sbuf_printf(sb, "%s<descr>", indent); 642258683Smav g_conf_printf_escaped(sb, "%s", dp->d_descr); 643258683Smav sbuf_printf(sb, "</descr>\n"); 644105537Sphk } 645105537Sphk} 646105537Sphk 647105537Sphkstatic void 648242322Straszg_disk_resize(void *ptr, int flag) 649238216Strasz{ 650242322Strasz struct disk *dp; 651238216Strasz struct g_geom *gp; 652238216Strasz struct g_provider *pp; 653238216Strasz 654242322Strasz if (flag == EV_CANCEL) 655242322Strasz return; 656242322Strasz g_topology_assert(); 657242322Strasz 658242322Strasz dp = ptr; 659238216Strasz gp = dp->d_geom; 660238216Strasz 661242322Strasz if (dp->d_destroyed || gp == NULL) 662242322Strasz return; 663242322Strasz 664238216Strasz LIST_FOREACH(pp, &gp->provider, provider) { 665238216Strasz if (pp->sectorsize != 0 && 666238216Strasz pp->sectorsize != dp->d_sectorsize) 667238216Strasz g_wither_provider(pp, ENXIO); 668238216Strasz else 669238216Strasz g_resize_provider(pp, dp->d_mediasize); 670238216Strasz } 671238216Strasz} 672238216Strasz 673238216Straszstatic void 674115309Sphkg_disk_create(void *arg, int flag) 67592108Sphk{ 67692108Sphk struct g_geom *gp; 67792108Sphk struct g_provider *pp; 678110708Sphk struct disk *dp; 679219970Smav struct g_disk_softc *sc; 680219970Smav char tmpstr[80]; 68192108Sphk 682115309Sphk if (flag == EV_CANCEL) 683115309Sphk return; 684104936Sphk g_topology_assert(); 685110708Sphk dp = arg; 686302069Sken 687302150Sken mtx_pool_lock(mtxpool_sleep, dp); 688302069Sken dp->d_init_level = DISK_INIT_START; 689302069Sken 690302069Sken /* 691302069Sken * If the disk has already gone away, we can just stop here and 692302069Sken * call the user's callback to tell him we've cleaned things up. 693302069Sken */ 694302069Sken if (dp->d_goneflag != 0) { 695302150Sken mtx_pool_unlock(mtxpool_sleep, dp); 696302069Sken if (dp->d_gone != NULL) 697302069Sken dp->d_gone(dp); 698302069Sken return; 699302069Sken } 700302150Sken mtx_pool_unlock(mtxpool_sleep, dp); 701302069Sken 702219970Smav sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO); 703256880Smav mtx_init(&sc->start_mtx, "g_disk_start", NULL, MTX_DEF); 704248694Smav mtx_init(&sc->done_mtx, "g_disk_done", NULL, MTX_DEF); 705219970Smav sc->dp = dp; 706356589Smav sc->d_devstat = dp->d_devstat; 707110708Sphk gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit); 708219970Smav gp->softc = sc; 709104936Sphk pp = g_new_providerf(gp, "%s", gp->name); 710256880Smav devstat_remove_entry(pp->stat); 711256880Smav pp->stat = NULL; 712256880Smav dp->d_devstat->id = pp; 713110708Sphk pp->mediasize = dp->d_mediasize; 714110708Sphk pp->sectorsize = dp->d_sectorsize; 715110710Sphk pp->stripeoffset = dp->d_stripeoffset; 716110710Sphk pp->stripesize = dp->d_stripesize; 717248516Skib if ((dp->d_flags & DISKFLAG_UNMAPPED_BIO) != 0) 718248516Skib pp->flags |= G_PF_ACCEPT_UNMAPPED; 719256880Smav if ((dp->d_flags & DISKFLAG_DIRECT_COMPLETION) != 0) 720256880Smav pp->flags |= G_PF_DIRECT_SEND; 721256880Smav pp->flags |= G_PF_DIRECT_RECEIVE; 722105957Sphk if (bootverbose) 723105957Sphk printf("GEOM: new disk %s\n", gp->name); 724219970Smav sysctl_ctx_init(&sc->sysctl_ctx); 725219970Smav snprintf(tmpstr, sizeof(tmpstr), "GEOM disk %s", gp->name); 726219970Smav sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 727219970Smav SYSCTL_STATIC_CHILDREN(_kern_geom_disk), OID_AUTO, gp->name, 728219970Smav CTLFLAG_RD, 0, tmpstr); 729219970Smav if (sc->sysctl_tree != NULL) { 730219970Smav SYSCTL_ADD_STRING(&sc->sysctl_ctx, 731219970Smav SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "led", 732267992Shselasky CTLFLAG_RWTUN, sc->led, sizeof(sc->led), 733219970Smav "LED name"); 734219970Smav } 735219970Smav pp->private = sc; 736112989Sphk dp->d_geom = gp; 737112989Sphk g_error_provider(pp, 0); 738302069Sken 739302150Sken mtx_pool_lock(mtxpool_sleep, dp); 740302069Sken dp->d_init_level = DISK_INIT_DONE; 741302069Sken 742302069Sken /* 743302069Sken * If the disk has gone away at this stage, start the withering 744302069Sken * process for it. 745302069Sken */ 746302069Sken if (dp->d_goneflag != 0) { 747302150Sken mtx_pool_unlock(mtxpool_sleep, dp); 748302069Sken g_wither_provider(pp, ENXIO); 749302069Sken return; 750302069Sken } 751302150Sken mtx_pool_unlock(mtxpool_sleep, dp); 752302069Sken 753104936Sphk} 754104936Sphk 755237518Sken/* 756237518Sken * We get this callback after all of the consumers have gone away, and just 757237518Sken * before the provider is freed. If the disk driver provided a d_gone 758237518Sken * callback, let them know that it is okay to free resources -- they won't 759237518Sken * be getting any more accesses from GEOM. 760237518Sken */ 761119652Sphkstatic void 762237518Skeng_disk_providergone(struct g_provider *pp) 763237518Sken{ 764237518Sken struct disk *dp; 765237518Sken struct g_disk_softc *sc; 766237518Sken 767248694Smav sc = (struct g_disk_softc *)pp->private; 768237518Sken dp = sc->dp; 769248694Smav if (dp != NULL && dp->d_gone != NULL) 770237518Sken dp->d_gone(dp); 771248694Smav if (sc->sysctl_tree != NULL) { 772248694Smav sysctl_ctx_free(&sc->sysctl_ctx); 773248694Smav sc->sysctl_tree = NULL; 774248694Smav } 775248694Smav if (sc->led[0] != 0) { 776248694Smav led_set(sc->led, "0"); 777248694Smav sc->led[0] = 0; 778248694Smav } 779248694Smav pp->private = NULL; 780248694Smav pp->geom->softc = NULL; 781248694Smav mtx_destroy(&sc->done_mtx); 782256880Smav mtx_destroy(&sc->start_mtx); 783248694Smav g_free(sc); 784237518Sken} 785237518Sken 786237518Skenstatic void 787119652Sphkg_disk_destroy(void *ptr, int flag) 788119652Sphk{ 789125975Sphk struct disk *dp; 790119652Sphk struct g_geom *gp; 791219970Smav struct g_disk_softc *sc; 792104936Sphk 793119652Sphk g_topology_assert(); 794125975Sphk dp = ptr; 795125975Sphk gp = dp->d_geom; 796140261Sphk if (gp != NULL) { 797219970Smav sc = gp->softc; 798248694Smav if (sc != NULL) 799248694Smav sc->dp = NULL; 800248694Smav dp->d_geom = NULL; 801140261Sphk g_wither_geom(gp, ENXIO); 802140261Sphk } 803302069Sken 804125975Sphk g_free(dp); 805119652Sphk} 806104936Sphk 807169287Spjd/* 808196823Spjd * We only allow printable characters in disk ident, 809196823Spjd * the rest is converted to 'x<HH>'. 810169287Spjd */ 811169287Spjdstatic void 812169287Spjdg_disk_ident_adjust(char *ident, size_t size) 813169287Spjd{ 814196823Spjd char *p, tmp[4], newid[DISK_IDENT_SIZE]; 815169287Spjd 816196823Spjd newid[0] = '\0'; 817196823Spjd for (p = ident; *p != '\0'; p++) { 818196823Spjd if (isprint(*p)) { 819196823Spjd tmp[0] = *p; 820196823Spjd tmp[1] = '\0'; 821196823Spjd } else { 822196823Spjd snprintf(tmp, sizeof(tmp), "x%02hhx", 823196823Spjd *(unsigned char *)p); 824196823Spjd } 825196823Spjd if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid)) 826169287Spjd break; 827169287Spjd } 828169287Spjd bzero(ident, size); 829169287Spjd strlcpy(ident, newid, size); 830169287Spjd} 831169287Spjd 832125975Sphkstruct disk * 833226735Spjddisk_alloc(void) 834125975Sphk{ 835125975Sphk 836226735Spjd return (g_malloc(sizeof(struct disk), M_WAITOK | M_ZERO)); 837125975Sphk} 838125975Sphk 839111668Sphkvoid 840125975Sphkdisk_create(struct disk *dp, int version) 841104936Sphk{ 842226736Spjd 843252657Ssmh if (version != DISK_VERSION) { 844125975Sphk printf("WARNING: Attempt to add disk %s%d %s", 845125975Sphk dp->d_name, dp->d_unit, 846125975Sphk " using incompatible ABI version of disk(9)\n"); 847125975Sphk printf("WARNING: Ignoring disk %s%d\n", 848125975Sphk dp->d_name, dp->d_unit); 849125975Sphk return; 850125975Sphk } 851257131Sjhb if (dp->d_flags & DISKFLAG_RESERVED) { 852257131Sjhb printf("WARNING: Attempt to add non-MPSAFE disk %s%d\n", 853257131Sjhb dp->d_name, dp->d_unit); 854257131Sjhb printf("WARNING: Ignoring disk %s%d\n", 855257131Sjhb dp->d_name, dp->d_unit); 856257131Sjhb return; 857257131Sjhb } 858110119Sphk KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy")); 859110119Sphk KASSERT(dp->d_name != NULL, ("disk_create need d_name")); 860110119Sphk KASSERT(*dp->d_name != 0, ("disk_create need d_name")); 861110317Sphk KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long")); 862120374Sphk if (dp->d_devstat == NULL) 863120374Sphk dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit, 864120374Sphk dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED, 865120374Sphk DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 866112989Sphk dp->d_geom = NULL; 867302069Sken 868302069Sken dp->d_init_level = DISK_INIT_NONE; 869302069Sken 870169287Spjd g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident)); 871113937Sphk g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL); 87292108Sphk} 87392108Sphk 87492108Sphkvoid 875111216Sphkdisk_destroy(struct disk *dp) 87692108Sphk{ 87792108Sphk 878112989Sphk g_cancel_event(dp); 879125975Sphk dp->d_destroyed = 1; 880131207Sphk if (dp->d_devstat != NULL) 881131207Sphk devstat_remove_entry(dp->d_devstat); 882131267Sphk g_post_event(g_disk_destroy, dp, M_WAITOK, NULL); 88392108Sphk} 88492108Sphk 885152565Sjdpvoid 886152565Sjdpdisk_gone(struct disk *dp) 887152565Sjdp{ 888152565Sjdp struct g_geom *gp; 889152565Sjdp struct g_provider *pp; 890152565Sjdp 891302150Sken mtx_pool_lock(mtxpool_sleep, dp); 892302069Sken dp->d_goneflag = 1; 893302069Sken 894302069Sken /* 895302069Sken * If we're still in the process of creating this disk (the 896302069Sken * g_disk_create() function is still queued, or is in 897302069Sken * progress), the init level will not yet be DISK_INIT_DONE. 898302069Sken * 899302069Sken * If that is the case, g_disk_create() will see d_goneflag 900302069Sken * and take care of cleaning things up. 901302069Sken * 902302069Sken * If the disk has already been created, we default to 903302069Sken * withering the provider as usual below. 904302069Sken * 905302069Sken * If the caller has not set a d_gone() callback, he will 906302069Sken * not be any worse off by returning here, because the geom 907302069Sken * has not been fully setup in any case. 908302069Sken */ 909302069Sken if (dp->d_init_level < DISK_INIT_DONE) { 910302150Sken mtx_pool_unlock(mtxpool_sleep, dp); 911302069Sken return; 912302069Sken } 913302150Sken mtx_pool_unlock(mtxpool_sleep, dp); 914302069Sken 915152565Sjdp gp = dp->d_geom; 916240822Spjd if (gp != NULL) { 917241022Spjd pp = LIST_FIRST(&gp->provider); 918241022Spjd if (pp != NULL) { 919241022Spjd KASSERT(LIST_NEXT(pp, provider) == NULL, 920241022Spjd ("geom %p has more than one provider", gp)); 921157619Smarcel g_wither_provider(pp, ENXIO); 922241022Spjd } 923240822Spjd } 924152565Sjdp} 925152565Sjdp 926223089Sgibbsvoid 927223089Sgibbsdisk_attr_changed(struct disk *dp, const char *attr, int flag) 928223089Sgibbs{ 929223089Sgibbs struct g_geom *gp; 930223089Sgibbs struct g_provider *pp; 931298420Sasomers char devnamebuf[128]; 932223089Sgibbs 933223089Sgibbs gp = dp->d_geom; 934223089Sgibbs if (gp != NULL) 935223089Sgibbs LIST_FOREACH(pp, &gp->provider, provider) 936223089Sgibbs (void)g_attr_changed(pp, attr, flag); 937298439Sasomers snprintf(devnamebuf, sizeof(devnamebuf), "devname=%s%d", dp->d_name, 938298439Sasomers dp->d_unit); 939298420Sasomers devctl_notify("GEOM", "disk", attr, devnamebuf); 940223089Sgibbs} 941223089Sgibbs 942238216Straszvoid 943238886Smavdisk_media_changed(struct disk *dp, int flag) 944238886Smav{ 945238886Smav struct g_geom *gp; 946238886Smav struct g_provider *pp; 947238886Smav 948238886Smav gp = dp->d_geom; 949238886Smav if (gp != NULL) { 950249161Smav pp = LIST_FIRST(&gp->provider); 951249161Smav if (pp != NULL) { 952249161Smav KASSERT(LIST_NEXT(pp, provider) == NULL, 953249161Smav ("geom %p has more than one provider", gp)); 954238886Smav g_media_changed(pp, flag); 955249161Smav } 956238886Smav } 957238886Smav} 958238886Smav 959238886Smavvoid 960238886Smavdisk_media_gone(struct disk *dp, int flag) 961238886Smav{ 962238886Smav struct g_geom *gp; 963238886Smav struct g_provider *pp; 964238886Smav 965238886Smav gp = dp->d_geom; 966238886Smav if (gp != NULL) { 967249161Smav pp = LIST_FIRST(&gp->provider); 968249161Smav if (pp != NULL) { 969249161Smav KASSERT(LIST_NEXT(pp, provider) == NULL, 970249161Smav ("geom %p has more than one provider", gp)); 971238886Smav g_media_gone(pp, flag); 972249161Smav } 973238886Smav } 974238886Smav} 975238886Smav 976242322Straszint 977242322Straszdisk_resize(struct disk *dp, int flag) 978238216Strasz{ 979238216Strasz 980242322Strasz if (dp->d_destroyed || dp->d_geom == NULL) 981242322Strasz return (0); 982238216Strasz 983242322Strasz return (g_post_event(g_disk_resize, dp, flag, NULL)); 984238216Strasz} 985238216Strasz 986104451Sphkstatic void 987112988Sphkg_kern_disks(void *p, int flag __unused) 988104451Sphk{ 989104451Sphk struct sbuf *sb; 990104451Sphk struct g_geom *gp; 991104451Sphk char *sp; 992104451Sphk 993104451Sphk sb = p; 994104451Sphk sp = ""; 995104451Sphk g_topology_assert(); 996104451Sphk LIST_FOREACH(gp, &g_disk_class.geom, geom) { 997104451Sphk sbuf_printf(sb, "%s%s", sp, gp->name); 998104451Sphk sp = " "; 999104451Sphk } 1000104451Sphk sbuf_finish(sb); 1001104451Sphk} 1002104451Sphk 1003104451Sphkstatic int 1004104451Sphksysctl_disks(SYSCTL_HANDLER_ARGS) 1005104451Sphk{ 1006104451Sphk int error; 1007104451Sphk struct sbuf *sb; 1008104451Sphk 1009181463Sdes sb = sbuf_new_auto(); 1010113940Sphk g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL); 1011113937Sphk error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 1012104451Sphk sbuf_delete(sb); 1013104451Sphk return error; 1014104451Sphk} 1015104451Sphk 1016217915SmdfSYSCTL_PROC(_kern, OID_AUTO, disks, 1017217915Smdf CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 1018104451Sphk sysctl_disks, "A", "names of available disks"); 1019