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 int dump_ioerr; /* dump i/o error */ 82 83 #ifdef DEBUG 84 int dumpfaildebug = 1; /* enter debugger if dump fails */ 85 #else 86 int dumpfaildebug = 0; 87 #endif 88 89 static ulong_t *dump_bitmap; /* bitmap for marking pages to dump */ 90 static pgcnt_t dump_bitmapsize; /* size of bitmap */ 91 static pid_t *dump_pids; /* list of process IDs at dump time */ 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; 154 155 ASSERT(MUTEX_HELD(&dump_lock)); 156 157 if (dumphdr == NULL) { 158 dumphdr = kmem_zalloc(sizeof (dumphdr_t), KM_SLEEP); 159 dumphdr->dump_magic = DUMP_MAGIC; 160 dumphdr->dump_version = DUMP_VERSION; 161 dumphdr->dump_wordsize = DUMP_WORDSIZE; 162 dumphdr->dump_pageshift = PAGESHIFT; 163 dumphdr->dump_pagesize = PAGESIZE; 164 dumphdr->dump_utsname = utsname; 165 (void) strcpy(dumphdr->dump_platform, platform); 166 dump_cmap = vmem_alloc(heap_arena, PAGESIZE, VM_SLEEP); 167 dumpbuf_size = dumpbuf_iosize(maxphys); 168 dumpbuf_start = kmem_alloc(dumpbuf_size, KM_SLEEP); 169 dumpbuf_end = dumpbuf_start + dumpbuf_size; 170 dump_cbuf = kmem_alloc(PAGESIZE, KM_SLEEP); /* compress buf */ 171 dump_uebuf = kmem_alloc(PAGESIZE, KM_SLEEP); /* UE buf */ 172 dump_pids = kmem_alloc(v.v_proc * sizeof (pid_t), KM_SLEEP); 173 } 174 175 npages = num_phys_pages(); 176 177 if (dump_bitmapsize != npages) { 178 void *map = kmem_alloc(BT_SIZEOFMAP(npages), KM_SLEEP); 179 kmem_free(dump_bitmap, BT_SIZEOFMAP(dump_bitmapsize)); 180 dump_bitmap = map; 181 dump_bitmapsize = npages; 182 } 183 } 184 185 /* 186 * Establish a new dump device. 187 */ 188 int 189 dumpinit(vnode_t *vp, char *name, int justchecking) 190 { 191 vnode_t *cvp; 192 vattr_t vattr; 193 vnode_t *cdev_vp; 194 int error = 0; 195 196 ASSERT(MUTEX_HELD(&dump_lock)); 197 198 dumphdr_init(); 199 200 cvp = common_specvp(vp); 201 if (cvp == dumpvp) 202 return (0); 203 204 /* 205 * Determine whether this is a plausible dump device. We want either: 206 * (1) a real device that's not mounted and has a cb_dump routine, or 207 * (2) a swapfile on some filesystem that has a vop_dump routine. 208 */ 209 if ((error = VOP_OPEN(&cvp, FREAD | FWRITE, kcred)) != 0) 210 return (error); 211 212 vattr.va_mask = AT_SIZE | AT_TYPE | AT_RDEV; 213 if ((error = VOP_GETATTR(cvp, &vattr, 0, kcred)) == 0) { 214 if (vattr.va_type == VBLK || vattr.va_type == VCHR) { 215 if (devopsp[getmajor(vattr.va_rdev)]-> 216 devo_cb_ops->cb_dump == nodev) 217 error = ENOTSUP; 218 else if (vfs_devismounted(vattr.va_rdev)) 219 error = EBUSY; 220 } else { 221 if (vn_matchopval(cvp, VOPNAME_DUMP, fs_nosys) || 222 !IS_SWAPVP(cvp)) 223 error = ENOTSUP; 224 } 225 } 226 227 if (error == 0 && vattr.va_size < 2 * DUMP_LOGSIZE + DUMP_ERPTSIZE) 228 error = ENOSPC; 229 230 if (error || justchecking) { 231 (void) VOP_CLOSE(cvp, FREAD | FWRITE, 1, (offset_t)0, kcred); 232 return (error); 233 } 234 235 VN_HOLD(cvp); 236 237 if (dumpvp != NULL) 238 dumpfini(); /* unconfigure the old dump device */ 239 240 dumpvp = cvp; 241 dumpvp_size = vattr.va_size & -DUMP_OFFSET; 242 dumppath = kmem_alloc(strlen(name) + 1, KM_SLEEP); 243 (void) strcpy(dumppath, name); 244 dump_iosize = 0; 245 246 /* 247 * If the dump device is a block device, attempt to open up the 248 * corresponding character device and determine its maximum transfer 249 * size. We use this information to potentially resize dumpbuf to a 250 * larger and more optimal size for performing i/o to the dump device. 251 */ 252 if (cvp->v_type == VBLK && 253 (cdev_vp = makespecvp(VTOS(cvp)->s_dev, VCHR)) != NULL) { 254 if (VOP_OPEN(&cdev_vp, FREAD | FWRITE, kcred) == 0) { 255 size_t blk_size; 256 struct dk_cinfo dki; 257 struct vtoc vtoc; 258 259 if (VOP_IOCTL(cdev_vp, DKIOCGVTOC, (intptr_t)&vtoc, 260 FKIOCTL, kcred, NULL) == 0 && vtoc.v_sectorsz != 0) 261 blk_size = vtoc.v_sectorsz; 262 else 263 blk_size = DEV_BSIZE; 264 265 if (VOP_IOCTL(cdev_vp, DKIOCINFO, (intptr_t)&dki, 266 FKIOCTL, kcred, NULL) == 0) { 267 dump_iosize = dki.dki_maxtransfer * blk_size; 268 dumpbuf_resize(); 269 } 270 271 (void) VOP_CLOSE(cdev_vp, FREAD | FWRITE, 1, 0, kcred); 272 } 273 274 VN_RELE(cdev_vp); 275 } 276 277 cmn_err(CE_CONT, "?dump on %s size %llu MB\n", name, dumpvp_size >> 20); 278 279 return (0); 280 } 281 282 void 283 dumpfini(void) 284 { 285 ASSERT(MUTEX_HELD(&dump_lock)); 286 287 kmem_free(dumppath, strlen(dumppath) + 1); 288 289 (void) VOP_CLOSE(dumpvp, FREAD | FWRITE, 1, (offset_t)0, kcred); 290 291 VN_RELE(dumpvp); 292 293 dumpvp = NULL; 294 dumpvp_size = 0; 295 dumppath = NULL; 296 } 297 298 static pfn_t 299 dump_bitnum_to_pfn(pgcnt_t bitnum) 300 { 301 struct memlist *mp; 302 303 for (mp = phys_install; mp != NULL; mp = mp->next) { 304 if (bitnum < (mp->size >> PAGESHIFT)) 305 return ((mp->address >> PAGESHIFT) + bitnum); 306 bitnum -= mp->size >> PAGESHIFT; 307 } 308 return (PFN_INVALID); 309 } 310 311 static pgcnt_t 312 dump_pfn_to_bitnum(pfn_t pfn) 313 { 314 struct memlist *mp; 315 pgcnt_t bitnum = 0; 316 317 for (mp = phys_install; mp != NULL; mp = mp->next) { 318 if (pfn >= (mp->address >> PAGESHIFT) && 319 pfn < ((mp->address + mp->size) >> PAGESHIFT)) 320 return (bitnum + pfn - (mp->address >> PAGESHIFT)); 321 bitnum += mp->size >> PAGESHIFT; 322 } 323 return ((pgcnt_t)-1); 324 } 325 326 static offset_t 327 dumpvp_flush(void) 328 { 329 size_t size = P2ROUNDUP(dumpbuf_cur - dumpbuf_start, PAGESIZE); 330 int err; 331 332 if (dumpvp_off + size > dumpvp_limit) { 333 dump_ioerr = ENOSPC; 334 } else if (size != 0) { 335 if (panicstr) 336 err = VOP_DUMP(dumpvp, dumpbuf_start, 337 lbtodb(dumpvp_off), btod(size)); 338 else 339 err = vn_rdwr(UIO_WRITE, dumpvp, dumpbuf_start, size, 340 dumpvp_off, UIO_SYSSPACE, 0, dumpvp_limit, 341 kcred, 0); 342 if (err && dump_ioerr == 0) 343 dump_ioerr = err; 344 } 345 dumpvp_off += size; 346 dumpbuf_cur = dumpbuf_start; 347 dump_timeleft = dump_timeout; 348 return (dumpvp_off); 349 } 350 351 void 352 dumpvp_write(const void *va, size_t size) 353 { 354 while (size != 0) { 355 size_t len = MIN(size, dumpbuf_end - dumpbuf_cur); 356 if (len == 0) { 357 (void) dumpvp_flush(); 358 } else { 359 bcopy(va, dumpbuf_cur, len); 360 va = (char *)va + len; 361 dumpbuf_cur += len; 362 size -= len; 363 } 364 } 365 } 366 367 /*ARGSUSED*/ 368 static void 369 dumpvp_ksyms_write(const void *src, void *dst, size_t size) 370 { 371 dumpvp_write(src, size); 372 } 373 374 /* 375 * Mark 'pfn' in the bitmap and dump its translation table entry. 376 */ 377 void 378 dump_addpage(struct as *as, void *va, pfn_t pfn) 379 { 380 mem_vtop_t mem_vtop; 381 pgcnt_t bitnum; 382 383 if ((bitnum = dump_pfn_to_bitnum(pfn)) != (pgcnt_t)-1) { 384 if (!BT_TEST(dump_bitmap, bitnum)) { 385 dumphdr->dump_npages++; 386 BT_SET(dump_bitmap, bitnum); 387 } 388 dumphdr->dump_nvtop++; 389 mem_vtop.m_as = as; 390 mem_vtop.m_va = va; 391 mem_vtop.m_pfn = pfn; 392 dumpvp_write(&mem_vtop, sizeof (mem_vtop_t)); 393 } 394 dump_timeleft = dump_timeout; 395 } 396 397 /* 398 * Mark 'pfn' in the bitmap 399 */ 400 void 401 dump_page(pfn_t pfn) 402 { 403 pgcnt_t bitnum; 404 405 if ((bitnum = dump_pfn_to_bitnum(pfn)) != (pgcnt_t)-1) { 406 if (!BT_TEST(dump_bitmap, bitnum)) { 407 dumphdr->dump_npages++; 408 BT_SET(dump_bitmap, bitnum); 409 } 410 } 411 dump_timeleft = dump_timeout; 412 } 413 414 /* 415 * Dump the <as, va, pfn> information for a given address space. 416 * SEGOP_DUMP() will call dump_addpage() for each page in the segment. 417 */ 418 static void 419 dump_as(struct as *as) 420 { 421 struct seg *seg; 422 423 AS_LOCK_ENTER(as, &as->a_lock, RW_READER); 424 for (seg = AS_SEGFIRST(as); seg; seg = AS_SEGNEXT(as, seg)) { 425 if (seg->s_as != as) 426 break; 427 if (seg->s_ops == NULL) 428 continue; 429 SEGOP_DUMP(seg); 430 } 431 AS_LOCK_EXIT(as, &as->a_lock); 432 433 if (seg != NULL) 434 cmn_err(CE_WARN, "invalid segment %p in address space %p", 435 (void *)seg, (void *)as); 436 } 437 438 static int 439 dump_process(pid_t pid) 440 { 441 proc_t *p = sprlock(pid); 442 443 if (p == NULL) 444 return (-1); 445 if (p->p_as != &kas) { 446 mutex_exit(&p->p_lock); 447 dump_as(p->p_as); 448 mutex_enter(&p->p_lock); 449 } 450 451 sprunlock(p); 452 453 return (0); 454 } 455 456 void 457 dump_ereports(void) 458 { 459 u_offset_t dumpvp_start; 460 erpt_dump_t ed; 461 462 if (dumpvp == NULL || dumphdr == NULL) 463 return; 464 465 dumpbuf_cur = dumpbuf_start; 466 dumpvp_limit = dumpvp_size - (DUMP_OFFSET + DUMP_LOGSIZE); 467 dumpvp_start = dumpvp_limit - DUMP_ERPTSIZE; 468 dumpvp_off = dumpvp_start; 469 470 fm_ereport_dump(); 471 if (panicstr) 472 errorq_dump(); 473 474 bzero(&ed, sizeof (ed)); /* indicate end of ereports */ 475 dumpvp_write(&ed, sizeof (ed)); 476 (void) dumpvp_flush(); 477 478 if (!panicstr) { 479 (void) VOP_PUTPAGE(dumpvp, dumpvp_start, 480 (size_t)(dumpvp_off - dumpvp_start), 481 B_INVAL | B_FORCE, kcred); 482 } 483 } 484 485 void 486 dump_messages(void) 487 { 488 log_dump_t ld; 489 mblk_t *mctl, *mdata; 490 queue_t *q, *qlast; 491 u_offset_t dumpvp_start; 492 493 if (dumpvp == NULL || dumphdr == NULL || log_consq == NULL) 494 return; 495 496 dumpbuf_cur = dumpbuf_start; 497 dumpvp_limit = dumpvp_size - DUMP_OFFSET; 498 dumpvp_start = dumpvp_limit - DUMP_LOGSIZE; 499 dumpvp_off = dumpvp_start; 500 501 qlast = NULL; 502 do { 503 for (q = log_consq; q->q_next != qlast; q = q->q_next) 504 continue; 505 for (mctl = q->q_first; mctl != NULL; mctl = mctl->b_next) { 506 dump_timeleft = dump_timeout; 507 mdata = mctl->b_cont; 508 ld.ld_magic = LOG_MAGIC; 509 ld.ld_msgsize = MBLKL(mctl->b_cont); 510 ld.ld_csum = checksum32(mctl->b_rptr, MBLKL(mctl)); 511 ld.ld_msum = checksum32(mdata->b_rptr, MBLKL(mdata)); 512 dumpvp_write(&ld, sizeof (ld)); 513 dumpvp_write(mctl->b_rptr, MBLKL(mctl)); 514 dumpvp_write(mdata->b_rptr, MBLKL(mdata)); 515 } 516 } while ((qlast = q) != log_consq); 517 518 ld.ld_magic = 0; /* indicate end of messages */ 519 dumpvp_write(&ld, sizeof (ld)); 520 (void) dumpvp_flush(); 521 if (!panicstr) { 522 (void) VOP_PUTPAGE(dumpvp, dumpvp_start, 523 (size_t)(dumpvp_off - dumpvp_start), 524 B_INVAL | B_FORCE, kcred); 525 } 526 } 527 528 static void 529 dump_pagecopy(void *src, void *dst) 530 { 531 long *wsrc = (long *)src; 532 long *wdst = (long *)dst; 533 const ulong_t ncopies = PAGESIZE / sizeof (long); 534 volatile int w = 0; 535 volatile int ueoff = -1; 536 on_trap_data_t otd; 537 538 if (on_trap(&otd, OT_DATA_EC)) { 539 if (ueoff == -1) { 540 uint64_t pa; 541 542 ueoff = w * sizeof (long); 543 pa = ptob((uint64_t)hat_getpfnum(kas.a_hat, src)) 544 + ueoff; 545 cmn_err(CE_WARN, "memory error at PA 0x%08x.%08x", 546 (uint32_t)(pa >> 32), (uint32_t)pa); 547 } 548 #ifdef _LP64 549 wdst[w++] = 0xbadecc00badecc; 550 #else 551 wdst[w++] = 0xbadecc; 552 #endif 553 } 554 while (w < ncopies) { 555 wdst[w] = wsrc[w]; 556 w++; 557 } 558 no_trap(); 559 } 560 561 /* 562 * Dump the system. 563 */ 564 void 565 dumpsys(void) 566 { 567 pfn_t pfn; 568 pgcnt_t bitnum; 569 int npages = 0; 570 int percent_done = 0; 571 uint32_t csize; 572 u_offset_t total_csize = 0; 573 int compress_ratio; 574 proc_t *p; 575 pid_t npids, pidx; 576 char *content; 577 578 if (dumpvp == NULL || dumphdr == NULL) { 579 uprintf("skipping system dump - no dump device configured\n"); 580 return; 581 } 582 dumpbuf_cur = dumpbuf_start; 583 584 /* 585 * Calculate the starting block for dump. If we're dumping on a 586 * swap device, start 1/5 of the way in; otherwise, start at the 587 * beginning. And never use the first page -- it may be a disk label. 588 */ 589 if (dumpvp->v_flag & VISSWAP) 590 dumphdr->dump_start = P2ROUNDUP(dumpvp_size / 5, DUMP_OFFSET); 591 else 592 dumphdr->dump_start = DUMP_OFFSET; 593 594 dumphdr->dump_flags = DF_VALID | DF_COMPLETE | DF_LIVE; 595 dumphdr->dump_crashtime = gethrestime_sec(); 596 dumphdr->dump_npages = 0; 597 dumphdr->dump_nvtop = 0; 598 bzero(dump_bitmap, BT_SIZEOFMAP(dump_bitmapsize)); 599 dump_timeleft = dump_timeout; 600 601 if (panicstr) { 602 dumphdr->dump_flags &= ~DF_LIVE; 603 (void) VOP_DUMPCTL(dumpvp, DUMP_FREE, NULL); 604 (void) VOP_DUMPCTL(dumpvp, DUMP_ALLOC, NULL); 605 (void) vsnprintf(dumphdr->dump_panicstring, DUMP_PANICSIZE, 606 panicstr, panicargs); 607 } 608 609 if (dump_conflags & DUMP_ALL) 610 content = "all"; 611 else if (dump_conflags & DUMP_CURPROC) 612 content = "kernel + curproc"; 613 else 614 content = "kernel"; 615 uprintf("dumping to %s, offset %lld, content: %s\n", dumppath, 616 dumphdr->dump_start, content); 617 618 /* 619 * Leave room for the message and ereport save areas and terminal dump 620 * header. 621 */ 622 dumpvp_limit = dumpvp_size - DUMP_LOGSIZE - DUMP_OFFSET - DUMP_ERPTSIZE; 623 624 /* 625 * Write out the symbol table. It's no longer compressed, 626 * so its 'size' and 'csize' are equal. 627 */ 628 dumpvp_off = dumphdr->dump_ksyms = dumphdr->dump_start + PAGESIZE; 629 dumphdr->dump_ksyms_size = dumphdr->dump_ksyms_csize = 630 ksyms_snapshot(dumpvp_ksyms_write, NULL, LONG_MAX); 631 632 /* 633 * Write out the translation map. 634 */ 635 dumphdr->dump_map = dumpvp_flush(); 636 dump_as(&kas); 637 dumphdr->dump_nvtop += dump_plat_addr(); 638 639 /* 640 * call into hat, which may have unmapped pages that also need to 641 * be in the dump 642 */ 643 hat_dump(); 644 645 if (dump_conflags & DUMP_ALL) { 646 mutex_enter(&pidlock); 647 648 for (npids = 0, p = practive; p != NULL; p = p->p_next) 649 dump_pids[npids++] = p->p_pid; 650 651 mutex_exit(&pidlock); 652 653 for (pidx = 0; pidx < npids; pidx++) 654 (void) dump_process(dump_pids[pidx]); 655 656 for (bitnum = 0; bitnum < dump_bitmapsize; bitnum++) { 657 dump_timeleft = dump_timeout; 658 BT_SET(dump_bitmap, bitnum); 659 } 660 dumphdr->dump_npages = dump_bitmapsize; 661 dumphdr->dump_flags |= DF_ALL; 662 663 } else if (dump_conflags & DUMP_CURPROC) { 664 /* 665 * Determine which pid is to be dumped. If we're panicking, we 666 * dump the process associated with panic_thread (if any). If 667 * this is a live dump, we dump the process associated with 668 * curthread. 669 */ 670 npids = 0; 671 if (panicstr) { 672 if (panic_thread != NULL && 673 panic_thread->t_procp != NULL && 674 panic_thread->t_procp != &p0) { 675 dump_pids[npids++] = 676 panic_thread->t_procp->p_pid; 677 } 678 } else { 679 dump_pids[npids++] = curthread->t_procp->p_pid; 680 } 681 682 if (npids && dump_process(dump_pids[0]) == 0) 683 dumphdr->dump_flags |= DF_CURPROC; 684 else 685 dumphdr->dump_flags |= DF_KERNEL; 686 687 } else { 688 dumphdr->dump_flags |= DF_KERNEL; 689 } 690 691 dumphdr->dump_hashmask = (1 << highbit(dumphdr->dump_nvtop - 1)) - 1; 692 693 /* 694 * Write out the pfn table. 695 */ 696 dumphdr->dump_pfn = dumpvp_flush(); 697 for (bitnum = 0; bitnum < dump_bitmapsize; bitnum++) { 698 dump_timeleft = dump_timeout; 699 if (!BT_TEST(dump_bitmap, bitnum)) 700 continue; 701 pfn = dump_bitnum_to_pfn(bitnum); 702 ASSERT(pfn != PFN_INVALID); 703 dumpvp_write(&pfn, sizeof (pfn_t)); 704 } 705 dump_plat_pfn(); 706 707 /* 708 * Write out all the pages. 709 */ 710 dumphdr->dump_data = dumpvp_flush(); 711 for (bitnum = 0; bitnum < dump_bitmapsize; bitnum++) { 712 dump_timeleft = dump_timeout; 713 if (!BT_TEST(dump_bitmap, bitnum)) 714 continue; 715 pfn = dump_bitnum_to_pfn(bitnum); 716 ASSERT(pfn != PFN_INVALID); 717 718 /* 719 * Map in page frame 'pfn', scan it for UE's while copying 720 * the data to dump_uebuf, unmap it, compress dump_uebuf into 721 * dump_cbuf, and write out dump_cbuf. The UE check ensures 722 * that we don't lose the whole dump because of a latent UE. 723 */ 724 hat_devload(kas.a_hat, dump_cmap, PAGESIZE, pfn, PROT_READ, 725 HAT_LOAD_NOCONSIST); 726 dump_pagecopy(dump_cmap, dump_uebuf); 727 hat_unload(kas.a_hat, dump_cmap, PAGESIZE, HAT_UNLOAD); 728 csize = (uint32_t)compress(dump_uebuf, dump_cbuf, PAGESIZE); 729 dumpvp_write(&csize, sizeof (uint32_t)); 730 dumpvp_write(dump_cbuf, csize); 731 if (dump_ioerr) { 732 dumphdr->dump_flags &= ~DF_COMPLETE; 733 dumphdr->dump_npages = npages; 734 break; 735 } 736 total_csize += csize; 737 if (++npages * 100LL / dumphdr->dump_npages > percent_done) { 738 uprintf("^\r%3d%% done", ++percent_done); 739 if (!panicstr) 740 delay(1); /* let the output be sent */ 741 } 742 } 743 dumphdr->dump_npages += dump_plat_data(dump_cbuf); 744 745 (void) dumpvp_flush(); 746 747 /* 748 * Write out the initial and terminal dump headers. 749 */ 750 dumpvp_off = dumphdr->dump_start; 751 dumpvp_write(dumphdr, sizeof (dumphdr_t)); 752 (void) dumpvp_flush(); 753 754 dumpvp_limit = dumpvp_size; 755 dumpvp_off = dumpvp_limit - DUMP_OFFSET; 756 dumpvp_write(dumphdr, sizeof (dumphdr_t)); 757 (void) dumpvp_flush(); 758 759 compress_ratio = (int)(100LL * npages / (btopr(total_csize + 1))); 760 761 uprintf("\r%3d%% done: %d pages dumped, compression ratio %d.%02d, ", 762 percent_done, npages, compress_ratio / 100, compress_ratio % 100); 763 764 if (dump_ioerr == 0) { 765 uprintf("dump succeeded\n"); 766 } else { 767 uprintf("dump failed: error %d\n", dump_ioerr); 768 if (panicstr && dumpfaildebug) 769 debug_enter("dump failed"); 770 } 771 772 /* 773 * Write out all undelivered messages. This has to be the *last* 774 * thing we do because the dump process itself emits messages. 775 */ 776 if (panicstr) { 777 dump_ereports(); 778 dump_messages(); 779 } 780 781 delay(2 * hz); /* let people see the 'done' message */ 782 dump_timeleft = 0; 783 dump_ioerr = 0; 784 } 785 786 /* 787 * This function is called whenever the memory size, as represented 788 * by the phys_install list, changes. 789 */ 790 void 791 dump_resize() 792 { 793 mutex_enter(&dump_lock); 794 dumphdr_init(); 795 dumpbuf_resize(); 796 mutex_exit(&dump_lock); 797 } 798