1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/types.h> 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/vm.h> 32 #include <sys/proc.h> 33 #include <sys/file.h> 34 #include <sys/conf.h> 35 #include <sys/kmem.h> 36 #include <sys/mem.h> 37 #include <sys/mman.h> 38 #include <sys/vnode.h> 39 #include <sys/errno.h> 40 #include <sys/memlist.h> 41 #include <sys/dumphdr.h> 42 #include <sys/dumpadm.h> 43 #include <sys/ksyms.h> 44 #include <sys/compress.h> 45 #include <sys/stream.h> 46 #include <sys/strsun.h> 47 #include <sys/cmn_err.h> 48 #include <sys/bitmap.h> 49 #include <sys/modctl.h> 50 #include <sys/utsname.h> 51 #include <sys/systeminfo.h> 52 #include <sys/vmem.h> 53 #include <sys/log.h> 54 #include <sys/var.h> 55 #include <sys/debug.h> 56 #include <sys/sunddi.h> 57 #include <fs/fs_subr.h> 58 #include <sys/fs/snode.h> 59 #include <sys/ontrap.h> 60 #include <sys/panic.h> 61 #include <sys/dkio.h> 62 #include <sys/vtoc.h> 63 #include <sys/errorq.h> 64 #include <sys/fm/util.h> 65 66 #include <vm/hat.h> 67 #include <vm/as.h> 68 #include <vm/page.h> 69 #include <vm/seg.h> 70 #include <vm/seg_kmem.h> 71 72 kmutex_t dump_lock; /* lock for dump configuration */ 73 dumphdr_t *dumphdr; /* dump header */ 74 int dump_conflags = DUMP_KERNEL; /* dump configuration flags */ 75 vnode_t *dumpvp; /* dump device vnode pointer */ 76 u_offset_t dumpvp_size; /* size of dump device, in bytes */ 77 static u_offset_t dumpvp_limit; /* maximum write offset */ 78 char *dumppath; /* pathname of dump device */ 79 int dump_timeout = 120; /* timeout for dumping page during panic */ 80 int dump_timeleft; /* portion of dump_timeout remaining */ 81 82 #ifdef DEBUG 83 int dumpfaildebug = 1; /* enter debugger if dump fails */ 84 #else 85 int dumpfaildebug = 0; 86 #endif 87 88 static ulong_t *dump_bitmap; /* bitmap for marking pages to dump */ 89 static pgcnt_t dump_bitmapsize; /* size of bitmap */ 90 static pid_t *dump_pids; /* list of process IDs at dump time */ 91 static int dump_ioerr; /* dump i/o error */ 92 static offset_t dumpvp_off; /* current dump device offset */ 93 static char *dump_cmap; /* VA for dump compression mapping */ 94 static char *dumpbuf_cur, *dumpbuf_start, *dumpbuf_end; 95 static char *dump_cbuf; /* compression buffer */ 96 static char *dump_uebuf; /* memory error detection buffer */ 97 static size_t dumpbuf_size; /* size of dumpbuf in bytes */ 98 static size_t dumpbuf_limit = 1UL << 23; /* 8MB */ 99 static size_t dump_iosize; /* device's best transfer size, if any */ 100 static uint64_t dumpbuf_thresh = 1ULL << 30; /* 1GB */ 101 static ulong_t dumpbuf_mult = 8; 102 103 /* 104 * The dump i/o buffer must be at least one page, at most xfer_size bytes, and 105 * should scale with physmem in between. The transfer size passed in will 106 * either represent a global default (maxphys) or the best size for the device. 107 * Once the physical memory size exceeds dumpbuf_thresh (1GB by default), we 108 * increase the percentage of physical memory that dumpbuf can consume by a 109 * factor of dumpbuf_mult (8 by default) to improve large memory performance. 110 * The size of the dumpbuf i/o buffer is limited by dumpbuf_limit (8MB by 111 * default) because the dump performance saturates beyond a certain size. 112 */ 113 static size_t 114 dumpbuf_iosize(size_t xfer_size) 115 { 116 pgcnt_t scale = physmem; 117 size_t iosize; 118 119 if (scale >= dumpbuf_thresh / PAGESIZE) { 120 scale *= dumpbuf_mult; /* increase scaling factor */ 121 iosize = MIN(xfer_size, scale) & PAGEMASK; 122 if (dumpbuf_limit && iosize > dumpbuf_limit) 123 iosize = MAX(PAGESIZE, dumpbuf_limit & PAGEMASK); 124 } else 125 iosize = MAX(PAGESIZE, MIN(xfer_size, scale) & PAGEMASK); 126 127 return (iosize); 128 } 129 130 static void 131 dumpbuf_resize(void) 132 { 133 char *old_buf = dumpbuf_start; 134 size_t old_size = dumpbuf_size; 135 char *new_buf; 136 size_t new_size; 137 138 ASSERT(MUTEX_HELD(&dump_lock)); 139 140 if ((new_size = dumpbuf_iosize(MAX(dump_iosize, maxphys))) <= old_size) 141 return; /* no need to reallocate buffer */ 142 143 new_buf = kmem_alloc(new_size, KM_SLEEP); 144 dumpbuf_size = new_size; 145 dumpbuf_start = new_buf; 146 dumpbuf_end = new_buf + new_size; 147 kmem_free(old_buf, old_size); 148 } 149 150 static void 151 dumphdr_init(void) 152 { 153 pgcnt_t npages = 0; 154 struct memlist *mp; 155 156 ASSERT(MUTEX_HELD(&dump_lock)); 157 158 if (dumphdr == NULL) { 159 dumphdr = kmem_zalloc(sizeof (dumphdr_t), KM_SLEEP); 160 dumphdr->dump_magic = DUMP_MAGIC; 161 dumphdr->dump_version = DUMP_VERSION; 162 dumphdr->dump_wordsize = DUMP_WORDSIZE; 163 dumphdr->dump_pageshift = PAGESHIFT; 164 dumphdr->dump_pagesize = PAGESIZE; 165 dumphdr->dump_utsname = utsname; 166 (void) strcpy(dumphdr->dump_platform, platform); 167 dump_cmap = vmem_alloc(heap_arena, PAGESIZE, VM_SLEEP); 168 dumpbuf_size = dumpbuf_iosize(maxphys); 169 dumpbuf_start = kmem_alloc(dumpbuf_size, KM_SLEEP); 170 dumpbuf_end = dumpbuf_start + dumpbuf_size; 171 dump_cbuf = kmem_alloc(PAGESIZE, KM_SLEEP); /* compress buf */ 172 dump_uebuf = kmem_alloc(PAGESIZE, KM_SLEEP); /* UE buf */ 173 dump_pids = kmem_alloc(v.v_proc * sizeof (pid_t), KM_SLEEP); 174 } 175 176 for (mp = phys_install; mp != NULL; mp = mp->next) 177 npages += mp->size >> PAGESHIFT; 178 179 if (dump_bitmapsize != npages) { 180 void *map = kmem_alloc(BT_SIZEOFMAP(npages), KM_SLEEP); 181 kmem_free(dump_bitmap, BT_SIZEOFMAP(dump_bitmapsize)); 182 dump_bitmap = map; 183 dump_bitmapsize = npages; 184 } 185 } 186 187 /* 188 * Establish a new dump device. 189 */ 190 int 191 dumpinit(vnode_t *vp, char *name, int justchecking) 192 { 193 vnode_t *cvp; 194 vattr_t vattr; 195 vnode_t *cdev_vp; 196 int error = 0; 197 198 ASSERT(MUTEX_HELD(&dump_lock)); 199 200 dumphdr_init(); 201 202 cvp = common_specvp(vp); 203 if (cvp == dumpvp) 204 return (0); 205 206 /* 207 * Determine whether this is a plausible dump device. We want either: 208 * (1) a real device that's not mounted and has a cb_dump routine, or 209 * (2) a swapfile on some filesystem that has a vop_dump routine. 210 */ 211 if ((error = VOP_OPEN(&cvp, FREAD | FWRITE, kcred)) != 0) 212 return (error); 213 214 vattr.va_mask = AT_SIZE | AT_TYPE | AT_RDEV; 215 if ((error = VOP_GETATTR(cvp, &vattr, 0, kcred)) == 0) { 216 if (vattr.va_type == VBLK || vattr.va_type == VCHR) { 217 if (devopsp[getmajor(vattr.va_rdev)]-> 218 devo_cb_ops->cb_dump == nodev) 219 error = ENOTSUP; 220 else if (vfs_devismounted(vattr.va_rdev)) 221 error = EBUSY; 222 } else { 223 if (vn_matchopval(cvp, VOPNAME_DUMP, fs_nosys) || 224 !IS_SWAPVP(cvp)) 225 error = ENOTSUP; 226 } 227 } 228 229 if (error == 0 && vattr.va_size < 2 * DUMP_LOGSIZE + DUMP_ERPTSIZE) 230 error = ENOSPC; 231 232 if (error || justchecking) { 233 (void) VOP_CLOSE(cvp, FREAD | FWRITE, 1, (offset_t)0, kcred); 234 return (error); 235 } 236 237 VN_HOLD(cvp); 238 239 if (dumpvp != NULL) 240 dumpfini(); /* unconfigure the old dump device */ 241 242 dumpvp = cvp; 243 dumpvp_size = vattr.va_size & -DUMP_OFFSET; 244 dumppath = kmem_alloc(strlen(name) + 1, KM_SLEEP); 245 (void) strcpy(dumppath, name); 246 dump_iosize = 0; 247 248 /* 249 * If the dump device is a block device, attempt to open up the 250 * corresponding character device and determine its maximum transfer 251 * size. We use this information to potentially resize dumpbuf to a 252 * larger and more optimal size for performing i/o to the dump device. 253 */ 254 if (cvp->v_type == VBLK && 255 (cdev_vp = makespecvp(VTOS(cvp)->s_dev, VCHR)) != NULL) { 256 if (VOP_OPEN(&cdev_vp, FREAD | FWRITE, kcred) == 0) { 257 size_t blk_size; 258 struct dk_cinfo dki; 259 struct vtoc vtoc; 260 261 if (VOP_IOCTL(cdev_vp, DKIOCGVTOC, (intptr_t)&vtoc, 262 FKIOCTL, kcred, NULL) == 0 && vtoc.v_sectorsz != 0) 263 blk_size = vtoc.v_sectorsz; 264 else 265 blk_size = DEV_BSIZE; 266 267 if (VOP_IOCTL(cdev_vp, DKIOCINFO, (intptr_t)&dki, 268 FKIOCTL, kcred, NULL) == 0) { 269 dump_iosize = dki.dki_maxtransfer * blk_size; 270 dumpbuf_resize(); 271 } 272 273 (void) VOP_CLOSE(cdev_vp, FREAD | FWRITE, 1, 0, kcred); 274 } 275 276 VN_RELE(cdev_vp); 277 } 278 279 cmn_err(CE_CONT, "?dump on %s size %llu MB\n", name, dumpvp_size >> 20); 280 281 return (0); 282 } 283 284 void 285 dumpfini(void) 286 { 287 ASSERT(MUTEX_HELD(&dump_lock)); 288 289 kmem_free(dumppath, strlen(dumppath) + 1); 290 291 (void) VOP_CLOSE(dumpvp, FREAD | FWRITE, 1, (offset_t)0, kcred); 292 293 VN_RELE(dumpvp); 294 295 dumpvp = NULL; 296 dumpvp_size = 0; 297 dumppath = NULL; 298 } 299 300 static pfn_t 301 dump_bitnum_to_pfn(pgcnt_t bitnum) 302 { 303 struct memlist *mp; 304 305 for (mp = phys_install; mp != NULL; mp = mp->next) { 306 if (bitnum < (mp->size >> PAGESHIFT)) 307 return ((mp->address >> PAGESHIFT) + bitnum); 308 bitnum -= mp->size >> PAGESHIFT; 309 } 310 return (PFN_INVALID); 311 } 312 313 static pgcnt_t 314 dump_pfn_to_bitnum(pfn_t pfn) 315 { 316 struct memlist *mp; 317 pgcnt_t bitnum = 0; 318 319 for (mp = phys_install; mp != NULL; mp = mp->next) { 320 if (pfn >= (mp->address >> PAGESHIFT) && 321 pfn < ((mp->address + mp->size) >> PAGESHIFT)) 322 return (bitnum + pfn - (mp->address >> PAGESHIFT)); 323 bitnum += mp->size >> PAGESHIFT; 324 } 325 return ((pgcnt_t)-1); 326 } 327 328 static offset_t 329 dumpvp_flush(void) 330 { 331 size_t size = P2ROUNDUP(dumpbuf_cur - dumpbuf_start, PAGESIZE); 332 int err; 333 334 if (dumpvp_off + size > dumpvp_limit) { 335 dump_ioerr = ENOSPC; 336 } else if (size != 0) { 337 if (panicstr) 338 err = VOP_DUMP(dumpvp, dumpbuf_start, 339 lbtodb(dumpvp_off), btod(size)); 340 else 341 err = vn_rdwr(UIO_WRITE, dumpvp, dumpbuf_start, size, 342 dumpvp_off, UIO_SYSSPACE, 0, dumpvp_limit, 343 kcred, 0); 344 if (err && dump_ioerr == 0) 345 dump_ioerr = err; 346 } 347 dumpvp_off += size; 348 dumpbuf_cur = dumpbuf_start; 349 dump_timeleft = dump_timeout; 350 return (dumpvp_off); 351 } 352 353 void 354 dumpvp_write(const void *va, size_t size) 355 { 356 while (size != 0) { 357 size_t len = MIN(size, dumpbuf_end - dumpbuf_cur); 358 if (len == 0) { 359 (void) dumpvp_flush(); 360 } else { 361 bcopy(va, dumpbuf_cur, len); 362 va = (char *)va + len; 363 dumpbuf_cur += len; 364 size -= len; 365 } 366 } 367 } 368 369 /*ARGSUSED*/ 370 static void 371 dumpvp_ksyms_write(const void *src, void *dst, size_t size) 372 { 373 dumpvp_write(src, size); 374 } 375 376 /* 377 * Mark 'pfn' in the bitmap and dump its translation table entry. 378 */ 379 void 380 dump_addpage(struct as *as, void *va, pfn_t pfn) 381 { 382 mem_vtop_t mem_vtop; 383 pgcnt_t bitnum; 384 385 if ((bitnum = dump_pfn_to_bitnum(pfn)) != (pgcnt_t)-1) { 386 if (!BT_TEST(dump_bitmap, bitnum)) { 387 dumphdr->dump_npages++; 388 BT_SET(dump_bitmap, bitnum); 389 } 390 dumphdr->dump_nvtop++; 391 mem_vtop.m_as = as; 392 mem_vtop.m_va = va; 393 mem_vtop.m_pfn = pfn; 394 dumpvp_write(&mem_vtop, sizeof (mem_vtop_t)); 395 } 396 dump_timeleft = dump_timeout; 397 } 398 399 /* 400 * Mark 'pfn' in the bitmap 401 */ 402 void 403 dump_page(pfn_t pfn) 404 { 405 pgcnt_t bitnum; 406 407 if ((bitnum = dump_pfn_to_bitnum(pfn)) != (pgcnt_t)-1) { 408 if (!BT_TEST(dump_bitmap, bitnum)) { 409 dumphdr->dump_npages++; 410 BT_SET(dump_bitmap, bitnum); 411 } 412 } 413 dump_timeleft = dump_timeout; 414 } 415 416 /* 417 * Dump the <as, va, pfn> information for a given address space. 418 * SEGOP_DUMP() will call dump_addpage() for each page in the segment. 419 */ 420 static void 421 dump_as(struct as *as) 422 { 423 struct seg *seg; 424 425 AS_LOCK_ENTER(as, &as->a_lock, RW_READER); 426 for (seg = AS_SEGFIRST(as); seg; seg = AS_SEGNEXT(as, seg)) { 427 if (seg->s_as != as) 428 break; 429 if (seg->s_ops == NULL) 430 continue; 431 SEGOP_DUMP(seg); 432 } 433 AS_LOCK_EXIT(as, &as->a_lock); 434 435 if (seg != NULL) 436 cmn_err(CE_WARN, "invalid segment %p in address space %p", 437 (void *)seg, (void *)as); 438 } 439 440 static int 441 dump_process(pid_t pid) 442 { 443 proc_t *p = sprlock(pid); 444 445 if (p == NULL) 446 return (-1); 447 if (p->p_as != &kas) { 448 mutex_exit(&p->p_lock); 449 dump_as(p->p_as); 450 mutex_enter(&p->p_lock); 451 } 452 453 sprunlock(p); 454 455 return (0); 456 } 457 458 void 459 dump_ereports(void) 460 { 461 u_offset_t dumpvp_start; 462 erpt_dump_t ed; 463 464 if (dumpvp == NULL || dumphdr == NULL) 465 return; 466 467 dumpbuf_cur = dumpbuf_start; 468 dumpvp_limit = dumpvp_size - (DUMP_OFFSET + DUMP_LOGSIZE); 469 dumpvp_start = dumpvp_limit - DUMP_ERPTSIZE; 470 dumpvp_off = dumpvp_start; 471 472 fm_ereport_dump(); 473 if (panicstr) 474 errorq_dump(); 475 476 bzero(&ed, sizeof (ed)); /* indicate end of ereports */ 477 dumpvp_write(&ed, sizeof (ed)); 478 (void) dumpvp_flush(); 479 480 if (!panicstr) { 481 (void) VOP_PUTPAGE(dumpvp, dumpvp_start, 482 (size_t)(dumpvp_off - dumpvp_start), 483 B_INVAL | B_FORCE, kcred); 484 } 485 } 486 487 void 488 dump_messages(void) 489 { 490 log_dump_t ld; 491 mblk_t *mctl, *mdata; 492 queue_t *q, *qlast; 493 u_offset_t dumpvp_start; 494 495 if (dumpvp == NULL || dumphdr == NULL || log_consq == NULL) 496 return; 497 498 dumpbuf_cur = dumpbuf_start; 499 dumpvp_limit = dumpvp_size - DUMP_OFFSET; 500 dumpvp_start = dumpvp_limit - DUMP_LOGSIZE; 501 dumpvp_off = dumpvp_start; 502 503 qlast = NULL; 504 do { 505 for (q = log_consq; q->q_next != qlast; q = q->q_next) 506 continue; 507 for (mctl = q->q_first; mctl != NULL; mctl = mctl->b_next) { 508 dump_timeleft = dump_timeout; 509 mdata = mctl->b_cont; 510 ld.ld_magic = LOG_MAGIC; 511 ld.ld_msgsize = MBLKL(mctl->b_cont); 512 ld.ld_csum = checksum32(mctl->b_rptr, MBLKL(mctl)); 513 ld.ld_msum = checksum32(mdata->b_rptr, MBLKL(mdata)); 514 dumpvp_write(&ld, sizeof (ld)); 515 dumpvp_write(mctl->b_rptr, MBLKL(mctl)); 516 dumpvp_write(mdata->b_rptr, MBLKL(mdata)); 517 } 518 } while ((qlast = q) != log_consq); 519 520 ld.ld_magic = 0; /* indicate end of messages */ 521 dumpvp_write(&ld, sizeof (ld)); 522 (void) dumpvp_flush(); 523 if (!panicstr) { 524 (void) VOP_PUTPAGE(dumpvp, dumpvp_start, 525 (size_t)(dumpvp_off - dumpvp_start), 526 B_INVAL | B_FORCE, kcred); 527 } 528 } 529 530 static void 531 dump_pagecopy(void *src, void *dst) 532 { 533 long *wsrc = (long *)src; 534 long *wdst = (long *)dst; 535 const ulong_t ncopies = PAGESIZE / sizeof (long); 536 volatile int w = 0; 537 volatile int ueoff = -1; 538 on_trap_data_t otd; 539 540 if (on_trap(&otd, OT_DATA_EC)) { 541 if (ueoff == -1) { 542 uint64_t pa; 543 544 ueoff = w * sizeof (long); 545 pa = ptob((uint64_t)hat_getpfnum(kas.a_hat, src)) 546 + ueoff; 547 cmn_err(CE_WARN, "memory error at PA 0x%08x.%08x", 548 (uint32_t)(pa >> 32), (uint32_t)pa); 549 } 550 #ifdef _LP64 551 wdst[w++] = 0xbadecc00badecc; 552 #else 553 wdst[w++] = 0xbadecc; 554 #endif 555 } 556 while (w < ncopies) { 557 wdst[w] = wsrc[w]; 558 w++; 559 } 560 no_trap(); 561 } 562 563 /* 564 * Dump the system. 565 */ 566 void 567 dumpsys(void) 568 { 569 pfn_t pfn; 570 pgcnt_t bitnum; 571 int npages = 0; 572 int percent_done = 0; 573 uint32_t csize; 574 u_offset_t total_csize = 0; 575 int compress_ratio; 576 proc_t *p; 577 pid_t npids, pidx; 578 char *content; 579 580 if (dumpvp == NULL || dumphdr == NULL) { 581 uprintf("skipping system dump - no dump device configured\n"); 582 return; 583 } 584 dumpbuf_cur = dumpbuf_start; 585 586 /* 587 * Calculate the starting block for dump. If we're dumping on a 588 * swap device, start 1/5 of the way in; otherwise, start at the 589 * beginning. And never use the first page -- it may be a disk label. 590 */ 591 if (dumpvp->v_flag & VISSWAP) 592 dumphdr->dump_start = P2ROUNDUP(dumpvp_size / 5, DUMP_OFFSET); 593 else 594 dumphdr->dump_start = DUMP_OFFSET; 595 596 dumphdr->dump_flags = DF_VALID | DF_COMPLETE | DF_LIVE; 597 dumphdr->dump_crashtime = gethrestime_sec(); 598 dumphdr->dump_npages = 0; 599 dumphdr->dump_nvtop = 0; 600 bzero(dump_bitmap, BT_SIZEOFMAP(dump_bitmapsize)); 601 dump_timeleft = dump_timeout; 602 603 if (panicstr) { 604 dumphdr->dump_flags &= ~DF_LIVE; 605 (void) VOP_DUMPCTL(dumpvp, DUMP_FREE, NULL); 606 (void) VOP_DUMPCTL(dumpvp, DUMP_ALLOC, NULL); 607 (void) vsnprintf(dumphdr->dump_panicstring, DUMP_PANICSIZE, 608 panicstr, panicargs); 609 } 610 611 if (dump_conflags & DUMP_ALL) 612 content = "all"; 613 else if (dump_conflags & DUMP_CURPROC) 614 content = "kernel + curproc"; 615 else 616 content = "kernel"; 617 uprintf("dumping to %s, offset %lld, content: %s\n", dumppath, 618 dumphdr->dump_start, content); 619 620 /* 621 * Leave room for the message and ereport save areas and terminal dump 622 * header. 623 */ 624 dumpvp_limit = dumpvp_size - DUMP_LOGSIZE - DUMP_OFFSET - DUMP_ERPTSIZE; 625 626 /* 627 * Write out the symbol table. It's no longer compressed, 628 * so its 'size' and 'csize' are equal. 629 */ 630 dumpvp_off = dumphdr->dump_ksyms = dumphdr->dump_start + PAGESIZE; 631 dumphdr->dump_ksyms_size = dumphdr->dump_ksyms_csize = 632 ksyms_snapshot(dumpvp_ksyms_write, NULL, LONG_MAX); 633 634 /* 635 * Write out the translation map. 636 */ 637 dumphdr->dump_map = dumpvp_flush(); 638 dump_as(&kas); 639 dumphdr->dump_nvtop += dump_plat_addr(); 640 641 /* 642 * call into hat, which may have unmapped pages that also need to 643 * be in the dump 644 */ 645 hat_dump(); 646 647 if (dump_conflags & DUMP_ALL) { 648 mutex_enter(&pidlock); 649 650 for (npids = 0, p = practive; p != NULL; p = p->p_next) 651 dump_pids[npids++] = p->p_pid; 652 653 mutex_exit(&pidlock); 654 655 for (pidx = 0; pidx < npids; pidx++) 656 (void) dump_process(dump_pids[pidx]); 657 658 for (bitnum = 0; bitnum < dump_bitmapsize; bitnum++) { 659 dump_timeleft = dump_timeout; 660 BT_SET(dump_bitmap, bitnum); 661 } 662 dumphdr->dump_npages = dump_bitmapsize; 663 dumphdr->dump_flags |= DF_ALL; 664 665 } else if (dump_conflags & DUMP_CURPROC) { 666 /* 667 * Determine which pid is to be dumped. If we're panicking, we 668 * dump the process associated with panic_thread (if any). If 669 * this is a live dump, we dump the process associated with 670 * curthread. 671 */ 672 npids = 0; 673 if (panicstr) { 674 if (panic_thread != NULL && 675 panic_thread->t_procp != NULL && 676 panic_thread->t_procp != &p0) { 677 dump_pids[npids++] = 678 panic_thread->t_procp->p_pid; 679 } 680 } else { 681 dump_pids[npids++] = curthread->t_procp->p_pid; 682 } 683 684 if (npids && dump_process(dump_pids[0]) == 0) 685 dumphdr->dump_flags |= DF_CURPROC; 686 else 687 dumphdr->dump_flags |= DF_KERNEL; 688 689 } else { 690 dumphdr->dump_flags |= DF_KERNEL; 691 } 692 693 dumphdr->dump_hashmask = (1 << highbit(dumphdr->dump_nvtop - 1)) - 1; 694 695 /* 696 * Write out the pfn table. 697 */ 698 dumphdr->dump_pfn = dumpvp_flush(); 699 for (bitnum = 0; bitnum < dump_bitmapsize; bitnum++) { 700 dump_timeleft = dump_timeout; 701 if (!BT_TEST(dump_bitmap, bitnum)) 702 continue; 703 pfn = dump_bitnum_to_pfn(bitnum); 704 ASSERT(pfn != PFN_INVALID); 705 dumpvp_write(&pfn, sizeof (pfn_t)); 706 } 707 dump_plat_pfn(); 708 709 /* 710 * Write out all the pages. 711 */ 712 dumphdr->dump_data = dumpvp_flush(); 713 for (bitnum = 0; bitnum < dump_bitmapsize; bitnum++) { 714 dump_timeleft = dump_timeout; 715 if (!BT_TEST(dump_bitmap, bitnum)) 716 continue; 717 pfn = dump_bitnum_to_pfn(bitnum); 718 ASSERT(pfn != PFN_INVALID); 719 720 /* 721 * Map in page frame 'pfn', scan it for UE's while copying 722 * the data to dump_uebuf, unmap it, compress dump_uebuf into 723 * dump_cbuf, and write out dump_cbuf. The UE check ensures 724 * that we don't lose the whole dump because of a latent UE. 725 */ 726 hat_devload(kas.a_hat, dump_cmap, PAGESIZE, pfn, PROT_READ, 727 HAT_LOAD_NOCONSIST); 728 dump_pagecopy(dump_cmap, dump_uebuf); 729 hat_unload(kas.a_hat, dump_cmap, PAGESIZE, HAT_UNLOAD); 730 csize = (uint32_t)compress(dump_uebuf, dump_cbuf, PAGESIZE); 731 dumpvp_write(&csize, sizeof (uint32_t)); 732 dumpvp_write(dump_cbuf, csize); 733 if (dump_ioerr) { 734 dumphdr->dump_flags &= ~DF_COMPLETE; 735 dumphdr->dump_npages = npages; 736 break; 737 } 738 total_csize += csize; 739 if (++npages * 100LL / dumphdr->dump_npages > percent_done) { 740 uprintf("^\r%3d%% done", ++percent_done); 741 if (!panicstr) 742 delay(1); /* let the output be sent */ 743 } 744 } 745 dumphdr->dump_npages += dump_plat_data(dump_cbuf); 746 747 (void) dumpvp_flush(); 748 749 /* 750 * Write out the initial and terminal dump headers. 751 */ 752 dumpvp_off = dumphdr->dump_start; 753 dumpvp_write(dumphdr, sizeof (dumphdr_t)); 754 (void) dumpvp_flush(); 755 756 dumpvp_limit = dumpvp_size; 757 dumpvp_off = dumpvp_limit - DUMP_OFFSET; 758 dumpvp_write(dumphdr, sizeof (dumphdr_t)); 759 (void) dumpvp_flush(); 760 761 compress_ratio = (int)(100LL * npages / (btopr(total_csize + 1))); 762 763 uprintf("\r%3d%% done: %d pages dumped, compression ratio %d.%02d, ", 764 percent_done, npages, compress_ratio / 100, compress_ratio % 100); 765 766 if (dump_ioerr == 0) { 767 uprintf("dump succeeded\n"); 768 } else { 769 uprintf("dump failed: error %d\n", dump_ioerr); 770 if (panicstr && dumpfaildebug) 771 debug_enter("dump failed"); 772 } 773 774 /* 775 * Write out all undelivered messages. This has to be the *last* 776 * thing we do because the dump process itself emits messages. 777 */ 778 if (panicstr) { 779 dump_ereports(); 780 dump_messages(); 781 } 782 783 delay(2 * hz); /* let people see the 'done' message */ 784 dump_timeleft = 0; 785 dump_ioerr = 0; 786 } 787 788 /* 789 * This function is called whenever the memory size, as represented 790 * by the phys_install list, changes. 791 */ 792 void 793 dump_resize() 794 { 795 mutex_enter(&dump_lock); 796 dumphdr_init(); 797 dumpbuf_resize(); 798 mutex_exit(&dump_lock); 799 } 800