md.c revision 221855
1/*- 2 * ---------------------------------------------------------------------------- 3 * "THE BEER-WARE LICENSE" (Revision 42): 4 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you 5 * can do whatever you want with this stuff. If we meet some day, and you think 6 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 7 * ---------------------------------------------------------------------------- 8 * 9 * $FreeBSD: head/sys/dev/md/md.c 221855 2011-05-13 19:35:01Z mdf $ 10 * 11 */ 12 13/*- 14 * The following functions are based in the vn(4) driver: mdstart_swap(), 15 * mdstart_vnode(), mdcreate_swap(), mdcreate_vnode() and mddestroy(), 16 * and as such under the following copyright: 17 * 18 * Copyright (c) 1988 University of Utah. 19 * Copyright (c) 1990, 1993 20 * The Regents of the University of California. All rights reserved. 21 * 22 * This code is derived from software contributed to Berkeley by 23 * the Systems Programming Group of the University of Utah Computer 24 * Science Department. 25 * 26 * Redistribution and use in source and binary forms, with or without 27 * modification, are permitted provided that the following conditions 28 * are met: 29 * 1. Redistributions of source code must retain the above copyright 30 * notice, this list of conditions and the following disclaimer. 31 * 2. Redistributions in binary form must reproduce the above copyright 32 * notice, this list of conditions and the following disclaimer in the 33 * documentation and/or other materials provided with the distribution. 34 * 4. Neither the name of the University nor the names of its contributors 35 * may be used to endorse or promote products derived from this software 36 * without specific prior written permission. 37 * 38 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 39 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 41 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 42 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 43 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 44 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 46 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 47 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * 50 * from: Utah Hdr: vn.c 1.13 94/04/02 51 * 52 * from: @(#)vn.c 8.6 (Berkeley) 4/1/94 53 * From: src/sys/dev/vn/vn.c,v 1.122 2000/12/16 16:06:03 54 */ 55 56#include "opt_geom.h" 57#include "opt_md.h" 58 59#include <sys/param.h> 60#include <sys/systm.h> 61#include <sys/bio.h> 62#include <sys/conf.h> 63#include <sys/devicestat.h> 64#include <sys/fcntl.h> 65#include <sys/kernel.h> 66#include <sys/kthread.h> 67#include <sys/limits.h> 68#include <sys/linker.h> 69#include <sys/lock.h> 70#include <sys/malloc.h> 71#include <sys/mdioctl.h> 72#include <sys/mount.h> 73#include <sys/mutex.h> 74#include <sys/sx.h> 75#include <sys/namei.h> 76#include <sys/proc.h> 77#include <sys/queue.h> 78#include <sys/sched.h> 79#include <sys/sf_buf.h> 80#include <sys/sysctl.h> 81#include <sys/vnode.h> 82 83#include <geom/geom.h> 84 85#include <vm/vm.h> 86#include <vm/vm_object.h> 87#include <vm/vm_page.h> 88#include <vm/vm_pager.h> 89#include <vm/swap_pager.h> 90#include <vm/uma.h> 91 92#include <machine/vmparam.h> 93 94#define MD_MODVER 1 95 96#define MD_SHUTDOWN 0x10000 /* Tell worker thread to terminate. */ 97#define MD_EXITING 0x20000 /* Worker thread is exiting. */ 98 99#ifndef MD_NSECT 100#define MD_NSECT (10000 * 2) 101#endif 102 103static MALLOC_DEFINE(M_MD, "md_disk", "Memory Disk"); 104static MALLOC_DEFINE(M_MDSECT, "md_sectors", "Memory Disk Sectors"); 105 106static int md_debug; 107SYSCTL_INT(_debug, OID_AUTO, mddebug, CTLFLAG_RW, &md_debug, 0, ""); 108static int md_malloc_wait; 109SYSCTL_INT(_vm, OID_AUTO, md_malloc_wait, CTLFLAG_RW, &md_malloc_wait, 0, ""); 110 111#if defined(MD_ROOT) && defined(MD_ROOT_SIZE) 112/* 113 * Preloaded image gets put here. 114 * Applications that patch the object with the image can determine 115 * the size looking at the start and end markers (strings), 116 * so we want them contiguous. 117 */ 118static struct { 119 u_char start[MD_ROOT_SIZE*1024]; 120 u_char end[128]; 121} mfs_root = { 122 .start = "MFS Filesystem goes here", 123 .end = "MFS Filesystem had better STOP here", 124}; 125#endif 126 127static g_init_t g_md_init; 128static g_fini_t g_md_fini; 129static g_start_t g_md_start; 130static g_access_t g_md_access; 131static void g_md_dumpconf(struct sbuf *sb, const char *indent, 132 struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp); 133 134static int mdunits; 135static struct cdev *status_dev = 0; 136static struct sx md_sx; 137static struct unrhdr *md_uh; 138 139static d_ioctl_t mdctlioctl; 140 141static struct cdevsw mdctl_cdevsw = { 142 .d_version = D_VERSION, 143 .d_ioctl = mdctlioctl, 144 .d_name = MD_NAME, 145}; 146 147struct g_class g_md_class = { 148 .name = "MD", 149 .version = G_VERSION, 150 .init = g_md_init, 151 .fini = g_md_fini, 152 .start = g_md_start, 153 .access = g_md_access, 154 .dumpconf = g_md_dumpconf, 155}; 156 157DECLARE_GEOM_CLASS(g_md_class, g_md); 158 159 160static LIST_HEAD(, md_s) md_softc_list = LIST_HEAD_INITIALIZER(md_softc_list); 161 162#define NINDIR (PAGE_SIZE / sizeof(uintptr_t)) 163#define NMASK (NINDIR-1) 164static int nshift; 165 166struct indir { 167 uintptr_t *array; 168 u_int total; 169 u_int used; 170 u_int shift; 171}; 172 173struct md_s { 174 int unit; 175 LIST_ENTRY(md_s) list; 176 struct bio_queue_head bio_queue; 177 struct mtx queue_mtx; 178 struct cdev *dev; 179 enum md_types type; 180 off_t mediasize; 181 unsigned sectorsize; 182 unsigned opencount; 183 unsigned fwheads; 184 unsigned fwsectors; 185 unsigned flags; 186 char name[20]; 187 struct proc *procp; 188 struct g_geom *gp; 189 struct g_provider *pp; 190 int (*start)(struct md_s *sc, struct bio *bp); 191 struct devstat *devstat; 192 193 /* MD_MALLOC related fields */ 194 struct indir *indir; 195 uma_zone_t uma; 196 197 /* MD_PRELOAD related fields */ 198 u_char *pl_ptr; 199 size_t pl_len; 200 201 /* MD_VNODE related fields */ 202 struct vnode *vnode; 203 char file[PATH_MAX]; 204 struct ucred *cred; 205 206 /* MD_SWAP related fields */ 207 vm_object_t object; 208}; 209 210static struct indir * 211new_indir(u_int shift) 212{ 213 struct indir *ip; 214 215 ip = malloc(sizeof *ip, M_MD, (md_malloc_wait ? M_WAITOK : M_NOWAIT) 216 | M_ZERO); 217 if (ip == NULL) 218 return (NULL); 219 ip->array = malloc(sizeof(uintptr_t) * NINDIR, 220 M_MDSECT, (md_malloc_wait ? M_WAITOK : M_NOWAIT) | M_ZERO); 221 if (ip->array == NULL) { 222 free(ip, M_MD); 223 return (NULL); 224 } 225 ip->total = NINDIR; 226 ip->shift = shift; 227 return (ip); 228} 229 230static void 231del_indir(struct indir *ip) 232{ 233 234 free(ip->array, M_MDSECT); 235 free(ip, M_MD); 236} 237 238static void 239destroy_indir(struct md_s *sc, struct indir *ip) 240{ 241 int i; 242 243 for (i = 0; i < NINDIR; i++) { 244 if (!ip->array[i]) 245 continue; 246 if (ip->shift) 247 destroy_indir(sc, (struct indir*)(ip->array[i])); 248 else if (ip->array[i] > 255) 249 uma_zfree(sc->uma, (void *)(ip->array[i])); 250 } 251 del_indir(ip); 252} 253 254/* 255 * This function does the math and allocates the top level "indir" structure 256 * for a device of "size" sectors. 257 */ 258 259static struct indir * 260dimension(off_t size) 261{ 262 off_t rcnt; 263 struct indir *ip; 264 int layer; 265 266 rcnt = size; 267 layer = 0; 268 while (rcnt > NINDIR) { 269 rcnt /= NINDIR; 270 layer++; 271 } 272 273 /* 274 * XXX: the top layer is probably not fully populated, so we allocate 275 * too much space for ip->array in here. 276 */ 277 ip = malloc(sizeof *ip, M_MD, M_WAITOK | M_ZERO); 278 ip->array = malloc(sizeof(uintptr_t) * NINDIR, 279 M_MDSECT, M_WAITOK | M_ZERO); 280 ip->total = NINDIR; 281 ip->shift = layer * nshift; 282 return (ip); 283} 284 285/* 286 * Read a given sector 287 */ 288 289static uintptr_t 290s_read(struct indir *ip, off_t offset) 291{ 292 struct indir *cip; 293 int idx; 294 uintptr_t up; 295 296 if (md_debug > 1) 297 printf("s_read(%jd)\n", (intmax_t)offset); 298 up = 0; 299 for (cip = ip; cip != NULL;) { 300 if (cip->shift) { 301 idx = (offset >> cip->shift) & NMASK; 302 up = cip->array[idx]; 303 cip = (struct indir *)up; 304 continue; 305 } 306 idx = offset & NMASK; 307 return (cip->array[idx]); 308 } 309 return (0); 310} 311 312/* 313 * Write a given sector, prune the tree if the value is 0 314 */ 315 316static int 317s_write(struct indir *ip, off_t offset, uintptr_t ptr) 318{ 319 struct indir *cip, *lip[10]; 320 int idx, li; 321 uintptr_t up; 322 323 if (md_debug > 1) 324 printf("s_write(%jd, %p)\n", (intmax_t)offset, (void *)ptr); 325 up = 0; 326 li = 0; 327 cip = ip; 328 for (;;) { 329 lip[li++] = cip; 330 if (cip->shift) { 331 idx = (offset >> cip->shift) & NMASK; 332 up = cip->array[idx]; 333 if (up != 0) { 334 cip = (struct indir *)up; 335 continue; 336 } 337 /* Allocate branch */ 338 cip->array[idx] = 339 (uintptr_t)new_indir(cip->shift - nshift); 340 if (cip->array[idx] == 0) 341 return (ENOSPC); 342 cip->used++; 343 up = cip->array[idx]; 344 cip = (struct indir *)up; 345 continue; 346 } 347 /* leafnode */ 348 idx = offset & NMASK; 349 up = cip->array[idx]; 350 if (up != 0) 351 cip->used--; 352 cip->array[idx] = ptr; 353 if (ptr != 0) 354 cip->used++; 355 break; 356 } 357 if (cip->used != 0 || li == 1) 358 return (0); 359 li--; 360 while (cip->used == 0 && cip != ip) { 361 li--; 362 idx = (offset >> lip[li]->shift) & NMASK; 363 up = lip[li]->array[idx]; 364 KASSERT(up == (uintptr_t)cip, ("md screwed up")); 365 del_indir(cip); 366 lip[li]->array[idx] = 0; 367 lip[li]->used--; 368 cip = lip[li]; 369 } 370 return (0); 371} 372 373 374static int 375g_md_access(struct g_provider *pp, int r, int w, int e) 376{ 377 struct md_s *sc; 378 379 sc = pp->geom->softc; 380 if (sc == NULL) { 381 if (r <= 0 && w <= 0 && e <= 0) 382 return (0); 383 return (ENXIO); 384 } 385 r += pp->acr; 386 w += pp->acw; 387 e += pp->ace; 388 if ((sc->flags & MD_READONLY) != 0 && w > 0) 389 return (EROFS); 390 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { 391 sc->opencount = 1; 392 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { 393 sc->opencount = 0; 394 } 395 return (0); 396} 397 398static void 399g_md_start(struct bio *bp) 400{ 401 struct md_s *sc; 402 403 sc = bp->bio_to->geom->softc; 404 if ((bp->bio_cmd == BIO_READ) || (bp->bio_cmd == BIO_WRITE)) 405 devstat_start_transaction_bio(sc->devstat, bp); 406 mtx_lock(&sc->queue_mtx); 407 bioq_disksort(&sc->bio_queue, bp); 408 mtx_unlock(&sc->queue_mtx); 409 wakeup(sc); 410} 411 412static int 413mdstart_malloc(struct md_s *sc, struct bio *bp) 414{ 415 int i, error; 416 u_char *dst; 417 off_t secno, nsec, uc; 418 uintptr_t sp, osp; 419 420 switch (bp->bio_cmd) { 421 case BIO_READ: 422 case BIO_WRITE: 423 case BIO_DELETE: 424 break; 425 default: 426 return (EOPNOTSUPP); 427 } 428 429 nsec = bp->bio_length / sc->sectorsize; 430 secno = bp->bio_offset / sc->sectorsize; 431 dst = bp->bio_data; 432 error = 0; 433 while (nsec--) { 434 osp = s_read(sc->indir, secno); 435 if (bp->bio_cmd == BIO_DELETE) { 436 if (osp != 0) 437 error = s_write(sc->indir, secno, 0); 438 } else if (bp->bio_cmd == BIO_READ) { 439 if (osp == 0) 440 bzero(dst, sc->sectorsize); 441 else if (osp <= 255) 442 memset(dst, osp, sc->sectorsize); 443 else { 444 bcopy((void *)osp, dst, sc->sectorsize); 445 cpu_flush_dcache(dst, sc->sectorsize); 446 } 447 osp = 0; 448 } else if (bp->bio_cmd == BIO_WRITE) { 449 if (sc->flags & MD_COMPRESS) { 450 uc = dst[0]; 451 for (i = 1; i < sc->sectorsize; i++) 452 if (dst[i] != uc) 453 break; 454 } else { 455 i = 0; 456 uc = 0; 457 } 458 if (i == sc->sectorsize) { 459 if (osp != uc) 460 error = s_write(sc->indir, secno, uc); 461 } else { 462 if (osp <= 255) { 463 sp = (uintptr_t)uma_zalloc(sc->uma, 464 md_malloc_wait ? M_WAITOK : 465 M_NOWAIT); 466 if (sp == 0) { 467 error = ENOSPC; 468 break; 469 } 470 bcopy(dst, (void *)sp, sc->sectorsize); 471 error = s_write(sc->indir, secno, sp); 472 } else { 473 bcopy(dst, (void *)osp, sc->sectorsize); 474 osp = 0; 475 } 476 } 477 } else { 478 error = EOPNOTSUPP; 479 } 480 if (osp > 255) 481 uma_zfree(sc->uma, (void*)osp); 482 if (error != 0) 483 break; 484 secno++; 485 dst += sc->sectorsize; 486 } 487 bp->bio_resid = 0; 488 return (error); 489} 490 491static int 492mdstart_preload(struct md_s *sc, struct bio *bp) 493{ 494 495 switch (bp->bio_cmd) { 496 case BIO_READ: 497 bcopy(sc->pl_ptr + bp->bio_offset, bp->bio_data, 498 bp->bio_length); 499 cpu_flush_dcache(bp->bio_data, bp->bio_length); 500 break; 501 case BIO_WRITE: 502 bcopy(bp->bio_data, sc->pl_ptr + bp->bio_offset, 503 bp->bio_length); 504 break; 505 } 506 bp->bio_resid = 0; 507 return (0); 508} 509 510static int 511mdstart_vnode(struct md_s *sc, struct bio *bp) 512{ 513 int error, vfslocked; 514 struct uio auio; 515 struct iovec aiov; 516 struct mount *mp; 517 struct vnode *vp; 518 struct thread *td; 519 off_t end, zerosize; 520 521 switch (bp->bio_cmd) { 522 case BIO_READ: 523 case BIO_WRITE: 524 case BIO_DELETE: 525 case BIO_FLUSH: 526 break; 527 default: 528 return (EOPNOTSUPP); 529 } 530 531 td = curthread; 532 vp = sc->vnode; 533 534 /* 535 * VNODE I/O 536 * 537 * If an error occurs, we set BIO_ERROR but we do not set 538 * B_INVAL because (for a write anyway), the buffer is 539 * still valid. 540 */ 541 542 if (bp->bio_cmd == BIO_FLUSH) { 543 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 544 (void) vn_start_write(vp, &mp, V_WAIT); 545 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 546 error = VOP_FSYNC(vp, MNT_WAIT, td); 547 VOP_UNLOCK(vp, 0); 548 vn_finished_write(mp); 549 VFS_UNLOCK_GIANT(vfslocked); 550 return (error); 551 } 552 553 bzero(&auio, sizeof(auio)); 554 555 /* 556 * Special case for BIO_DELETE. On the surface, this is very 557 * similar to BIO_WRITE, except that we write from our own 558 * fixed-length buffer, so we have to loop. The net result is 559 * that the two cases end up having very little in common. 560 */ 561 if (bp->bio_cmd == BIO_DELETE) { 562 zerosize = ZERO_REGION_SIZE - 563 (ZERO_REGION_SIZE % sc->sectorsize); 564 auio.uio_iov = &aiov; 565 auio.uio_iovcnt = 1; 566 auio.uio_offset = (vm_ooffset_t)bp->bio_offset; 567 auio.uio_segflg = UIO_SYSSPACE; 568 auio.uio_rw = UIO_WRITE; 569 auio.uio_td = td; 570 end = bp->bio_offset + bp->bio_length; 571 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 572 (void) vn_start_write(vp, &mp, V_WAIT); 573 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 574 error = 0; 575 while (auio.uio_offset < end) { 576 aiov.iov_base = __DECONST(void *, zero_region); 577 aiov.iov_len = end - auio.uio_offset; 578 if (aiov.iov_len > zerosize) 579 aiov.iov_len = zerosize; 580 auio.uio_resid = aiov.iov_len; 581 error = VOP_WRITE(vp, &auio, 582 sc->flags & MD_ASYNC ? 0 : IO_SYNC, sc->cred); 583 if (error != 0) 584 break; 585 } 586 VOP_UNLOCK(vp, 0); 587 vn_finished_write(mp); 588 bp->bio_resid = end - auio.uio_offset; 589 VFS_UNLOCK_GIANT(vfslocked); 590 return (error); 591 } 592 593 aiov.iov_base = bp->bio_data; 594 aiov.iov_len = bp->bio_length; 595 auio.uio_iov = &aiov; 596 auio.uio_iovcnt = 1; 597 auio.uio_offset = (vm_ooffset_t)bp->bio_offset; 598 auio.uio_segflg = UIO_SYSSPACE; 599 if (bp->bio_cmd == BIO_READ) 600 auio.uio_rw = UIO_READ; 601 else if (bp->bio_cmd == BIO_WRITE) 602 auio.uio_rw = UIO_WRITE; 603 else 604 panic("wrong BIO_OP in mdstart_vnode"); 605 auio.uio_resid = bp->bio_length; 606 auio.uio_td = td; 607 /* 608 * When reading set IO_DIRECT to try to avoid double-caching 609 * the data. When writing IO_DIRECT is not optimal. 610 */ 611 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 612 if (bp->bio_cmd == BIO_READ) { 613 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 614 error = VOP_READ(vp, &auio, IO_DIRECT, sc->cred); 615 VOP_UNLOCK(vp, 0); 616 } else { 617 (void) vn_start_write(vp, &mp, V_WAIT); 618 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 619 error = VOP_WRITE(vp, &auio, sc->flags & MD_ASYNC ? 0 : IO_SYNC, 620 sc->cred); 621 VOP_UNLOCK(vp, 0); 622 vn_finished_write(mp); 623 } 624 VFS_UNLOCK_GIANT(vfslocked); 625 bp->bio_resid = auio.uio_resid; 626 return (error); 627} 628 629static int 630mdstart_swap(struct md_s *sc, struct bio *bp) 631{ 632 struct sf_buf *sf; 633 int rv, offs, len, lastend; 634 vm_pindex_t i, lastp; 635 vm_page_t m; 636 u_char *p; 637 638 switch (bp->bio_cmd) { 639 case BIO_READ: 640 case BIO_WRITE: 641 case BIO_DELETE: 642 break; 643 default: 644 return (EOPNOTSUPP); 645 } 646 647 p = bp->bio_data; 648 649 /* 650 * offs is the offset at which to start operating on the 651 * next (ie, first) page. lastp is the last page on 652 * which we're going to operate. lastend is the ending 653 * position within that last page (ie, PAGE_SIZE if 654 * we're operating on complete aligned pages). 655 */ 656 offs = bp->bio_offset % PAGE_SIZE; 657 lastp = (bp->bio_offset + bp->bio_length - 1) / PAGE_SIZE; 658 lastend = (bp->bio_offset + bp->bio_length - 1) % PAGE_SIZE + 1; 659 660 rv = VM_PAGER_OK; 661 VM_OBJECT_LOCK(sc->object); 662 vm_object_pip_add(sc->object, 1); 663 for (i = bp->bio_offset / PAGE_SIZE; i <= lastp; i++) { 664 len = ((i == lastp) ? lastend : PAGE_SIZE) - offs; 665 666 m = vm_page_grab(sc->object, i, 667 VM_ALLOC_NORMAL|VM_ALLOC_RETRY); 668 VM_OBJECT_UNLOCK(sc->object); 669 sched_pin(); 670 sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 671 VM_OBJECT_LOCK(sc->object); 672 if (bp->bio_cmd == BIO_READ) { 673 if (m->valid != VM_PAGE_BITS_ALL) 674 rv = vm_pager_get_pages(sc->object, &m, 1, 0); 675 if (rv == VM_PAGER_ERROR) { 676 sf_buf_free(sf); 677 sched_unpin(); 678 vm_page_wakeup(m); 679 break; 680 } 681 bcopy((void *)(sf_buf_kva(sf) + offs), p, len); 682 cpu_flush_dcache(p, len); 683 } else if (bp->bio_cmd == BIO_WRITE) { 684 if (len != PAGE_SIZE && m->valid != VM_PAGE_BITS_ALL) 685 rv = vm_pager_get_pages(sc->object, &m, 1, 0); 686 if (rv == VM_PAGER_ERROR) { 687 sf_buf_free(sf); 688 sched_unpin(); 689 vm_page_wakeup(m); 690 break; 691 } 692 bcopy(p, (void *)(sf_buf_kva(sf) + offs), len); 693 m->valid = VM_PAGE_BITS_ALL; 694 } else if (bp->bio_cmd == BIO_DELETE) { 695 if (len != PAGE_SIZE && m->valid != VM_PAGE_BITS_ALL) 696 rv = vm_pager_get_pages(sc->object, &m, 1, 0); 697 if (rv == VM_PAGER_ERROR) { 698 sf_buf_free(sf); 699 sched_unpin(); 700 vm_page_wakeup(m); 701 break; 702 } 703 if (len != PAGE_SIZE) { 704 bzero((void *)(sf_buf_kva(sf) + offs), len); 705 vm_page_clear_dirty(m, offs, len); 706 m->valid = VM_PAGE_BITS_ALL; 707 } else 708 vm_pager_page_unswapped(m); 709 } 710 sf_buf_free(sf); 711 sched_unpin(); 712 vm_page_wakeup(m); 713 vm_page_lock(m); 714 if (bp->bio_cmd == BIO_DELETE && len == PAGE_SIZE) 715 vm_page_free(m); 716 else 717 vm_page_activate(m); 718 vm_page_unlock(m); 719 if (bp->bio_cmd == BIO_WRITE) 720 vm_page_dirty(m); 721 722 /* Actions on further pages start at offset 0 */ 723 p += PAGE_SIZE - offs; 724 offs = 0; 725#if 0 726if (bootverbose || bp->bio_offset / PAGE_SIZE < 17) 727printf("wire_count %d busy %d flags %x hold_count %d act_count %d queue %d valid %d dirty %d @ %d\n", 728 m->wire_count, m->busy, 729 m->flags, m->hold_count, m->act_count, m->queue, m->valid, m->dirty, i); 730#endif 731 } 732 vm_object_pip_subtract(sc->object, 1); 733 VM_OBJECT_UNLOCK(sc->object); 734 return (rv != VM_PAGER_ERROR ? 0 : ENOSPC); 735} 736 737static void 738md_kthread(void *arg) 739{ 740 struct md_s *sc; 741 struct bio *bp; 742 int error; 743 744 sc = arg; 745 thread_lock(curthread); 746 sched_prio(curthread, PRIBIO); 747 thread_unlock(curthread); 748 if (sc->type == MD_VNODE) 749 curthread->td_pflags |= TDP_NORUNNINGBUF; 750 751 for (;;) { 752 mtx_lock(&sc->queue_mtx); 753 if (sc->flags & MD_SHUTDOWN) { 754 sc->flags |= MD_EXITING; 755 mtx_unlock(&sc->queue_mtx); 756 kproc_exit(0); 757 } 758 bp = bioq_takefirst(&sc->bio_queue); 759 if (!bp) { 760 msleep(sc, &sc->queue_mtx, PRIBIO | PDROP, "mdwait", 0); 761 continue; 762 } 763 mtx_unlock(&sc->queue_mtx); 764 if (bp->bio_cmd == BIO_GETATTR) { 765 if ((sc->fwsectors && sc->fwheads && 766 (g_handleattr_int(bp, "GEOM::fwsectors", 767 sc->fwsectors) || 768 g_handleattr_int(bp, "GEOM::fwheads", 769 sc->fwheads))) || 770 g_handleattr_int(bp, "GEOM::candelete", 1)) 771 error = -1; 772 else 773 error = EOPNOTSUPP; 774 } else { 775 error = sc->start(sc, bp); 776 } 777 778 if (error != -1) { 779 bp->bio_completed = bp->bio_length; 780 if ((bp->bio_cmd == BIO_READ) || (bp->bio_cmd == BIO_WRITE)) 781 devstat_end_transaction_bio(sc->devstat, bp); 782 g_io_deliver(bp, error); 783 } 784 } 785} 786 787static struct md_s * 788mdfind(int unit) 789{ 790 struct md_s *sc; 791 792 LIST_FOREACH(sc, &md_softc_list, list) { 793 if (sc->unit == unit) 794 break; 795 } 796 return (sc); 797} 798 799static struct md_s * 800mdnew(int unit, int *errp, enum md_types type) 801{ 802 struct md_s *sc; 803 int error; 804 805 *errp = 0; 806 if (unit == -1) 807 unit = alloc_unr(md_uh); 808 else 809 unit = alloc_unr_specific(md_uh, unit); 810 811 if (unit == -1) { 812 *errp = EBUSY; 813 return (NULL); 814 } 815 816 sc = (struct md_s *)malloc(sizeof *sc, M_MD, M_WAITOK | M_ZERO); 817 sc->type = type; 818 bioq_init(&sc->bio_queue); 819 mtx_init(&sc->queue_mtx, "md bio queue", NULL, MTX_DEF); 820 sc->unit = unit; 821 sprintf(sc->name, "md%d", unit); 822 LIST_INSERT_HEAD(&md_softc_list, sc, list); 823 error = kproc_create(md_kthread, sc, &sc->procp, 0, 0,"%s", sc->name); 824 if (error == 0) 825 return (sc); 826 LIST_REMOVE(sc, list); 827 mtx_destroy(&sc->queue_mtx); 828 free_unr(md_uh, sc->unit); 829 free(sc, M_MD); 830 *errp = error; 831 return (NULL); 832} 833 834static void 835mdinit(struct md_s *sc) 836{ 837 struct g_geom *gp; 838 struct g_provider *pp; 839 840 g_topology_lock(); 841 gp = g_new_geomf(&g_md_class, "md%d", sc->unit); 842 gp->softc = sc; 843 pp = g_new_providerf(gp, "md%d", sc->unit); 844 pp->mediasize = sc->mediasize; 845 pp->sectorsize = sc->sectorsize; 846 sc->gp = gp; 847 sc->pp = pp; 848 g_error_provider(pp, 0); 849 g_topology_unlock(); 850 sc->devstat = devstat_new_entry("md", sc->unit, sc->sectorsize, 851 DEVSTAT_ALL_SUPPORTED, DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX); 852} 853 854/* 855 * XXX: we should check that the range they feed us is mapped. 856 * XXX: we should implement read-only. 857 */ 858 859static int 860mdcreate_preload(struct md_s *sc, struct md_ioctl *mdio) 861{ 862 863 if (mdio->md_options & ~(MD_AUTOUNIT | MD_FORCE)) 864 return (EINVAL); 865 if (mdio->md_base == 0) 866 return (EINVAL); 867 sc->flags = mdio->md_options & MD_FORCE; 868 /* Cast to pointer size, then to pointer to avoid warning */ 869 sc->pl_ptr = (u_char *)(uintptr_t)mdio->md_base; 870 sc->pl_len = (size_t)sc->mediasize; 871 return (0); 872} 873 874 875static int 876mdcreate_malloc(struct md_s *sc, struct md_ioctl *mdio) 877{ 878 uintptr_t sp; 879 int error; 880 off_t u; 881 882 error = 0; 883 if (mdio->md_options & ~(MD_AUTOUNIT | MD_COMPRESS | MD_RESERVE)) 884 return (EINVAL); 885 if (mdio->md_sectorsize != 0 && !powerof2(mdio->md_sectorsize)) 886 return (EINVAL); 887 /* Compression doesn't make sense if we have reserved space */ 888 if (mdio->md_options & MD_RESERVE) 889 mdio->md_options &= ~MD_COMPRESS; 890 if (mdio->md_fwsectors != 0) 891 sc->fwsectors = mdio->md_fwsectors; 892 if (mdio->md_fwheads != 0) 893 sc->fwheads = mdio->md_fwheads; 894 sc->flags = mdio->md_options & (MD_COMPRESS | MD_FORCE); 895 sc->indir = dimension(sc->mediasize / sc->sectorsize); 896 sc->uma = uma_zcreate(sc->name, sc->sectorsize, NULL, NULL, NULL, NULL, 897 0x1ff, 0); 898 if (mdio->md_options & MD_RESERVE) { 899 off_t nsectors; 900 901 nsectors = sc->mediasize / sc->sectorsize; 902 for (u = 0; u < nsectors; u++) { 903 sp = (uintptr_t)uma_zalloc(sc->uma, (md_malloc_wait ? 904 M_WAITOK : M_NOWAIT) | M_ZERO); 905 if (sp != 0) 906 error = s_write(sc->indir, u, sp); 907 else 908 error = ENOMEM; 909 if (error != 0) 910 break; 911 } 912 } 913 return (error); 914} 915 916 917static int 918mdsetcred(struct md_s *sc, struct ucred *cred) 919{ 920 char *tmpbuf; 921 int error = 0; 922 923 /* 924 * Set credits in our softc 925 */ 926 927 if (sc->cred) 928 crfree(sc->cred); 929 sc->cred = crhold(cred); 930 931 /* 932 * Horrible kludge to establish credentials for NFS XXX. 933 */ 934 935 if (sc->vnode) { 936 struct uio auio; 937 struct iovec aiov; 938 939 tmpbuf = malloc(sc->sectorsize, M_TEMP, M_WAITOK); 940 bzero(&auio, sizeof(auio)); 941 942 aiov.iov_base = tmpbuf; 943 aiov.iov_len = sc->sectorsize; 944 auio.uio_iov = &aiov; 945 auio.uio_iovcnt = 1; 946 auio.uio_offset = 0; 947 auio.uio_rw = UIO_READ; 948 auio.uio_segflg = UIO_SYSSPACE; 949 auio.uio_resid = aiov.iov_len; 950 vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY); 951 error = VOP_READ(sc->vnode, &auio, 0, sc->cred); 952 VOP_UNLOCK(sc->vnode, 0); 953 free(tmpbuf, M_TEMP); 954 } 955 return (error); 956} 957 958static int 959mdcreate_vnode(struct md_s *sc, struct md_ioctl *mdio, struct thread *td) 960{ 961 struct vattr vattr; 962 struct nameidata nd; 963 char *fname; 964 int error, flags, vfslocked; 965 966 /* 967 * Kernel-originated requests must have the filename appended 968 * to the mdio structure to protect against malicious software. 969 */ 970 fname = mdio->md_file; 971 if ((void *)fname != (void *)(mdio + 1)) { 972 error = copyinstr(fname, sc->file, sizeof(sc->file), NULL); 973 if (error != 0) 974 return (error); 975 } else 976 strlcpy(sc->file, fname, sizeof(sc->file)); 977 978 /* 979 * If the user specified that this is a read only device, don't 980 * set the FWRITE mask before trying to open the backing store. 981 */ 982 flags = FREAD | ((mdio->md_options & MD_READONLY) ? 0 : FWRITE); 983 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_SYSSPACE, sc->file, td); 984 error = vn_open(&nd, &flags, 0, NULL); 985 if (error != 0) 986 return (error); 987 vfslocked = NDHASGIANT(&nd); 988 NDFREE(&nd, NDF_ONLY_PNBUF); 989 if (nd.ni_vp->v_type != VREG) { 990 error = EINVAL; 991 goto bad; 992 } 993 error = VOP_GETATTR(nd.ni_vp, &vattr, td->td_ucred); 994 if (error != 0) 995 goto bad; 996 if (VOP_ISLOCKED(nd.ni_vp) != LK_EXCLUSIVE) { 997 vn_lock(nd.ni_vp, LK_UPGRADE | LK_RETRY); 998 if (nd.ni_vp->v_iflag & VI_DOOMED) { 999 /* Forced unmount. */ 1000 error = EBADF; 1001 goto bad; 1002 } 1003 } 1004 nd.ni_vp->v_vflag |= VV_MD; 1005 VOP_UNLOCK(nd.ni_vp, 0); 1006 1007 if (mdio->md_fwsectors != 0) 1008 sc->fwsectors = mdio->md_fwsectors; 1009 if (mdio->md_fwheads != 0) 1010 sc->fwheads = mdio->md_fwheads; 1011 sc->flags = mdio->md_options & (MD_FORCE | MD_ASYNC); 1012 if (!(flags & FWRITE)) 1013 sc->flags |= MD_READONLY; 1014 sc->vnode = nd.ni_vp; 1015 1016 error = mdsetcred(sc, td->td_ucred); 1017 if (error != 0) { 1018 sc->vnode = NULL; 1019 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY); 1020 nd.ni_vp->v_vflag &= ~VV_MD; 1021 goto bad; 1022 } 1023 VFS_UNLOCK_GIANT(vfslocked); 1024 return (0); 1025bad: 1026 VOP_UNLOCK(nd.ni_vp, 0); 1027 (void)vn_close(nd.ni_vp, flags, td->td_ucred, td); 1028 VFS_UNLOCK_GIANT(vfslocked); 1029 return (error); 1030} 1031 1032static int 1033mddestroy(struct md_s *sc, struct thread *td) 1034{ 1035 int vfslocked; 1036 1037 if (sc->gp) { 1038 sc->gp->softc = NULL; 1039 g_topology_lock(); 1040 g_wither_geom(sc->gp, ENXIO); 1041 g_topology_unlock(); 1042 sc->gp = NULL; 1043 sc->pp = NULL; 1044 } 1045 if (sc->devstat) { 1046 devstat_remove_entry(sc->devstat); 1047 sc->devstat = NULL; 1048 } 1049 mtx_lock(&sc->queue_mtx); 1050 sc->flags |= MD_SHUTDOWN; 1051 wakeup(sc); 1052 while (!(sc->flags & MD_EXITING)) 1053 msleep(sc->procp, &sc->queue_mtx, PRIBIO, "mddestroy", hz / 10); 1054 mtx_unlock(&sc->queue_mtx); 1055 mtx_destroy(&sc->queue_mtx); 1056 if (sc->vnode != NULL) { 1057 vfslocked = VFS_LOCK_GIANT(sc->vnode->v_mount); 1058 vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY); 1059 sc->vnode->v_vflag &= ~VV_MD; 1060 VOP_UNLOCK(sc->vnode, 0); 1061 (void)vn_close(sc->vnode, sc->flags & MD_READONLY ? 1062 FREAD : (FREAD|FWRITE), sc->cred, td); 1063 VFS_UNLOCK_GIANT(vfslocked); 1064 } 1065 if (sc->cred != NULL) 1066 crfree(sc->cred); 1067 if (sc->object != NULL) 1068 vm_object_deallocate(sc->object); 1069 if (sc->indir) 1070 destroy_indir(sc, sc->indir); 1071 if (sc->uma) 1072 uma_zdestroy(sc->uma); 1073 1074 LIST_REMOVE(sc, list); 1075 free_unr(md_uh, sc->unit); 1076 free(sc, M_MD); 1077 return (0); 1078} 1079 1080static int 1081mdcreate_swap(struct md_s *sc, struct md_ioctl *mdio, struct thread *td) 1082{ 1083 vm_ooffset_t npage; 1084 int error; 1085 1086 /* 1087 * Range check. Disallow negative sizes or any size less then the 1088 * size of a page. Then round to a page. 1089 */ 1090 if (sc->mediasize == 0 || (sc->mediasize % PAGE_SIZE) != 0) 1091 return (EDOM); 1092 1093 /* 1094 * Allocate an OBJT_SWAP object. 1095 * 1096 * Note the truncation. 1097 */ 1098 1099 npage = mdio->md_mediasize / PAGE_SIZE; 1100 if (mdio->md_fwsectors != 0) 1101 sc->fwsectors = mdio->md_fwsectors; 1102 if (mdio->md_fwheads != 0) 1103 sc->fwheads = mdio->md_fwheads; 1104 sc->object = vm_pager_allocate(OBJT_SWAP, NULL, PAGE_SIZE * npage, 1105 VM_PROT_DEFAULT, 0, td->td_ucred); 1106 if (sc->object == NULL) 1107 return (ENOMEM); 1108 sc->flags = mdio->md_options & MD_FORCE; 1109 if (mdio->md_options & MD_RESERVE) { 1110 if (swap_pager_reserve(sc->object, 0, npage) < 0) { 1111 error = EDOM; 1112 goto finish; 1113 } 1114 } 1115 error = mdsetcred(sc, td->td_ucred); 1116 finish: 1117 if (error != 0) { 1118 vm_object_deallocate(sc->object); 1119 sc->object = NULL; 1120 } 1121 return (error); 1122} 1123 1124 1125static int 1126xmdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, struct thread *td) 1127{ 1128 struct md_ioctl *mdio; 1129 struct md_s *sc; 1130 int error, i; 1131 1132 if (md_debug) 1133 printf("mdctlioctl(%s %lx %p %x %p)\n", 1134 devtoname(dev), cmd, addr, flags, td); 1135 1136 mdio = (struct md_ioctl *)addr; 1137 if (mdio->md_version != MDIOVERSION) 1138 return (EINVAL); 1139 1140 /* 1141 * We assert the version number in the individual ioctl 1142 * handlers instead of out here because (a) it is possible we 1143 * may add another ioctl in the future which doesn't read an 1144 * mdio, and (b) the correct return value for an unknown ioctl 1145 * is ENOIOCTL, not EINVAL. 1146 */ 1147 error = 0; 1148 switch (cmd) { 1149 case MDIOCATTACH: 1150 switch (mdio->md_type) { 1151 case MD_MALLOC: 1152 case MD_PRELOAD: 1153 case MD_VNODE: 1154 case MD_SWAP: 1155 break; 1156 default: 1157 return (EINVAL); 1158 } 1159 if (mdio->md_options & MD_AUTOUNIT) 1160 sc = mdnew(-1, &error, mdio->md_type); 1161 else { 1162 if (mdio->md_unit > INT_MAX) 1163 return (EINVAL); 1164 sc = mdnew(mdio->md_unit, &error, mdio->md_type); 1165 } 1166 if (sc == NULL) 1167 return (error); 1168 if (mdio->md_options & MD_AUTOUNIT) 1169 mdio->md_unit = sc->unit; 1170 sc->mediasize = mdio->md_mediasize; 1171 if (mdio->md_sectorsize == 0) 1172 sc->sectorsize = DEV_BSIZE; 1173 else 1174 sc->sectorsize = mdio->md_sectorsize; 1175 error = EDOOFUS; 1176 switch (sc->type) { 1177 case MD_MALLOC: 1178 sc->start = mdstart_malloc; 1179 error = mdcreate_malloc(sc, mdio); 1180 break; 1181 case MD_PRELOAD: 1182 sc->start = mdstart_preload; 1183 error = mdcreate_preload(sc, mdio); 1184 break; 1185 case MD_VNODE: 1186 sc->start = mdstart_vnode; 1187 error = mdcreate_vnode(sc, mdio, td); 1188 break; 1189 case MD_SWAP: 1190 sc->start = mdstart_swap; 1191 error = mdcreate_swap(sc, mdio, td); 1192 break; 1193 } 1194 if (error != 0) { 1195 mddestroy(sc, td); 1196 return (error); 1197 } 1198 1199 /* Prune off any residual fractional sector */ 1200 i = sc->mediasize % sc->sectorsize; 1201 sc->mediasize -= i; 1202 1203 mdinit(sc); 1204 return (0); 1205 case MDIOCDETACH: 1206 if (mdio->md_mediasize != 0 || 1207 (mdio->md_options & ~MD_FORCE) != 0) 1208 return (EINVAL); 1209 1210 sc = mdfind(mdio->md_unit); 1211 if (sc == NULL) 1212 return (ENOENT); 1213 if (sc->opencount != 0 && !(sc->flags & MD_FORCE) && 1214 !(mdio->md_options & MD_FORCE)) 1215 return (EBUSY); 1216 return (mddestroy(sc, td)); 1217 case MDIOCQUERY: 1218 sc = mdfind(mdio->md_unit); 1219 if (sc == NULL) 1220 return (ENOENT); 1221 mdio->md_type = sc->type; 1222 mdio->md_options = sc->flags; 1223 mdio->md_mediasize = sc->mediasize; 1224 mdio->md_sectorsize = sc->sectorsize; 1225 if (sc->type == MD_VNODE) 1226 error = copyout(sc->file, mdio->md_file, 1227 strlen(sc->file) + 1); 1228 return (error); 1229 case MDIOCLIST: 1230 i = 1; 1231 LIST_FOREACH(sc, &md_softc_list, list) { 1232 if (i == MDNPAD - 1) 1233 mdio->md_pad[i] = -1; 1234 else 1235 mdio->md_pad[i++] = sc->unit; 1236 } 1237 mdio->md_pad[0] = i - 1; 1238 return (0); 1239 default: 1240 return (ENOIOCTL); 1241 }; 1242} 1243 1244static int 1245mdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, struct thread *td) 1246{ 1247 int error; 1248 1249 sx_xlock(&md_sx); 1250 error = xmdctlioctl(dev, cmd, addr, flags, td); 1251 sx_xunlock(&md_sx); 1252 return (error); 1253} 1254 1255static void 1256md_preloaded(u_char *image, size_t length) 1257{ 1258 struct md_s *sc; 1259 int error; 1260 1261 sc = mdnew(-1, &error, MD_PRELOAD); 1262 if (sc == NULL) 1263 return; 1264 sc->mediasize = length; 1265 sc->sectorsize = DEV_BSIZE; 1266 sc->pl_ptr = image; 1267 sc->pl_len = length; 1268 sc->start = mdstart_preload; 1269#ifdef MD_ROOT 1270 if (sc->unit == 0) 1271 rootdevnames[0] = "ufs:/dev/md0"; 1272#endif 1273 mdinit(sc); 1274} 1275 1276static void 1277g_md_init(struct g_class *mp __unused) 1278{ 1279 caddr_t mod; 1280 u_char *ptr, *name, *type; 1281 unsigned len; 1282 int i; 1283 1284 /* figure out log2(NINDIR) */ 1285 for (i = NINDIR, nshift = -1; i; nshift++) 1286 i >>= 1; 1287 1288 mod = NULL; 1289 sx_init(&md_sx, "MD config lock"); 1290 g_topology_unlock(); 1291 md_uh = new_unrhdr(0, INT_MAX, NULL); 1292#ifdef MD_ROOT_SIZE 1293 sx_xlock(&md_sx); 1294 md_preloaded(mfs_root.start, sizeof(mfs_root.start)); 1295 sx_xunlock(&md_sx); 1296#endif 1297 /* XXX: are preload_* static or do they need Giant ? */ 1298 while ((mod = preload_search_next_name(mod)) != NULL) { 1299 name = (char *)preload_search_info(mod, MODINFO_NAME); 1300 if (name == NULL) 1301 continue; 1302 type = (char *)preload_search_info(mod, MODINFO_TYPE); 1303 if (type == NULL) 1304 continue; 1305 if (strcmp(type, "md_image") && strcmp(type, "mfs_root")) 1306 continue; 1307 ptr = preload_fetch_addr(mod); 1308 len = preload_fetch_size(mod); 1309 if (ptr != NULL && len != 0) { 1310 printf("%s%d: Preloaded image <%s> %d bytes at %p\n", 1311 MD_NAME, mdunits, name, len, ptr); 1312 sx_xlock(&md_sx); 1313 md_preloaded(ptr, len); 1314 sx_xunlock(&md_sx); 1315 } 1316 } 1317 status_dev = make_dev(&mdctl_cdevsw, INT_MAX, UID_ROOT, GID_WHEEL, 1318 0600, MDCTL_NAME); 1319 g_topology_lock(); 1320} 1321 1322static void 1323g_md_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 1324 struct g_consumer *cp __unused, struct g_provider *pp) 1325{ 1326 struct md_s *mp; 1327 char *type; 1328 1329 mp = gp->softc; 1330 if (mp == NULL) 1331 return; 1332 1333 switch (mp->type) { 1334 case MD_MALLOC: 1335 type = "malloc"; 1336 break; 1337 case MD_PRELOAD: 1338 type = "preload"; 1339 break; 1340 case MD_VNODE: 1341 type = "vnode"; 1342 break; 1343 case MD_SWAP: 1344 type = "swap"; 1345 break; 1346 default: 1347 type = "unknown"; 1348 break; 1349 } 1350 1351 if (pp != NULL) { 1352 if (indent == NULL) { 1353 sbuf_printf(sb, " u %d", mp->unit); 1354 sbuf_printf(sb, " s %ju", (uintmax_t) mp->sectorsize); 1355 sbuf_printf(sb, " f %ju", (uintmax_t) mp->fwheads); 1356 sbuf_printf(sb, " fs %ju", (uintmax_t) mp->fwsectors); 1357 sbuf_printf(sb, " l %ju", (uintmax_t) mp->mediasize); 1358 sbuf_printf(sb, " t %s", type); 1359 if (mp->type == MD_VNODE && mp->vnode != NULL) 1360 sbuf_printf(sb, " file %s", mp->file); 1361 } else { 1362 sbuf_printf(sb, "%s<unit>%d</unit>\n", indent, 1363 mp->unit); 1364 sbuf_printf(sb, "%s<sectorsize>%ju</sectorsize>\n", 1365 indent, (uintmax_t) mp->sectorsize); 1366 sbuf_printf(sb, "%s<fwheads>%ju</fwheads>\n", 1367 indent, (uintmax_t) mp->fwheads); 1368 sbuf_printf(sb, "%s<fwsectors>%ju</fwsectors>\n", 1369 indent, (uintmax_t) mp->fwsectors); 1370 sbuf_printf(sb, "%s<length>%ju</length>\n", 1371 indent, (uintmax_t) mp->mediasize); 1372 sbuf_printf(sb, "%s<type>%s</type>\n", indent, 1373 type); 1374 if (mp->type == MD_VNODE && mp->vnode != NULL) 1375 sbuf_printf(sb, "%s<file>%s</file>\n", 1376 indent, mp->file); 1377 } 1378 } 1379} 1380 1381static void 1382g_md_fini(struct g_class *mp __unused) 1383{ 1384 1385 sx_destroy(&md_sx); 1386 if (status_dev != NULL) 1387 destroy_dev(status_dev); 1388 delete_unrhdr(md_uh); 1389} 1390