g_part.c revision 238657
1/*- 2 * Copyright (c) 2002, 2005-2009 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/geom/part/g_part.c 238657 2012-07-20 17:51:20Z trasz $"); 29 30#include <sys/param.h> 31#include <sys/bio.h> 32#include <sys/diskmbr.h> 33#include <sys/endian.h> 34#include <sys/kernel.h> 35#include <sys/kobj.h> 36#include <sys/limits.h> 37#include <sys/lock.h> 38#include <sys/malloc.h> 39#include <sys/mutex.h> 40#include <sys/queue.h> 41#include <sys/sbuf.h> 42#include <sys/sysctl.h> 43#include <sys/systm.h> 44#include <sys/uuid.h> 45#include <geom/geom.h> 46#include <geom/geom_ctl.h> 47#include <geom/geom_int.h> 48#include <geom/part/g_part.h> 49 50#include "g_part_if.h" 51 52#ifndef _PATH_DEV 53#define _PATH_DEV "/dev/" 54#endif 55 56static kobj_method_t g_part_null_methods[] = { 57 { 0, 0 } 58}; 59 60static struct g_part_scheme g_part_null_scheme = { 61 "(none)", 62 g_part_null_methods, 63 sizeof(struct g_part_table), 64}; 65 66TAILQ_HEAD(, g_part_scheme) g_part_schemes = 67 TAILQ_HEAD_INITIALIZER(g_part_schemes); 68 69struct g_part_alias_list { 70 const char *lexeme; 71 enum g_part_alias alias; 72} g_part_alias_list[G_PART_ALIAS_COUNT] = { 73 { "apple-boot", G_PART_ALIAS_APPLE_BOOT }, 74 { "apple-hfs", G_PART_ALIAS_APPLE_HFS }, 75 { "apple-label", G_PART_ALIAS_APPLE_LABEL }, 76 { "apple-raid", G_PART_ALIAS_APPLE_RAID }, 77 { "apple-raid-offline", G_PART_ALIAS_APPLE_RAID_OFFLINE }, 78 { "apple-tv-recovery", G_PART_ALIAS_APPLE_TV_RECOVERY }, 79 { "apple-ufs", G_PART_ALIAS_APPLE_UFS }, 80 { "bios-boot", G_PART_ALIAS_BIOS_BOOT }, 81 { "ebr", G_PART_ALIAS_EBR }, 82 { "efi", G_PART_ALIAS_EFI }, 83 { "fat32", G_PART_ALIAS_MS_FAT32 }, 84 { "freebsd", G_PART_ALIAS_FREEBSD }, 85 { "freebsd-boot", G_PART_ALIAS_FREEBSD_BOOT }, 86 { "freebsd-nandfs", G_PART_ALIAS_FREEBSD_NANDFS }, 87 { "freebsd-swap", G_PART_ALIAS_FREEBSD_SWAP }, 88 { "freebsd-ufs", G_PART_ALIAS_FREEBSD_UFS }, 89 { "freebsd-vinum", G_PART_ALIAS_FREEBSD_VINUM }, 90 { "freebsd-zfs", G_PART_ALIAS_FREEBSD_ZFS }, 91 { "linux-data", G_PART_ALIAS_LINUX_DATA }, 92 { "linux-lvm", G_PART_ALIAS_LINUX_LVM }, 93 { "linux-raid", G_PART_ALIAS_LINUX_RAID }, 94 { "linux-swap", G_PART_ALIAS_LINUX_SWAP }, 95 { "mbr", G_PART_ALIAS_MBR }, 96 { "ms-basic-data", G_PART_ALIAS_MS_BASIC_DATA }, 97 { "ms-ldm-data", G_PART_ALIAS_MS_LDM_DATA }, 98 { "ms-ldm-metadata", G_PART_ALIAS_MS_LDM_METADATA }, 99 { "ms-reserved", G_PART_ALIAS_MS_RESERVED }, 100 { "ntfs", G_PART_ALIAS_MS_NTFS }, 101 { "netbsd-ccd", G_PART_ALIAS_NETBSD_CCD }, 102 { "netbsd-cgd", G_PART_ALIAS_NETBSD_CGD }, 103 { "netbsd-ffs", G_PART_ALIAS_NETBSD_FFS }, 104 { "netbsd-lfs", G_PART_ALIAS_NETBSD_LFS }, 105 { "netbsd-raid", G_PART_ALIAS_NETBSD_RAID }, 106 { "netbsd-swap", G_PART_ALIAS_NETBSD_SWAP }, 107 { "vmware-vmfs", G_PART_ALIAS_VMFS }, 108 { "vmware-vmkdiag", G_PART_ALIAS_VMKDIAG }, 109 { "vmware-reserved", G_PART_ALIAS_VMRESERVED }, 110}; 111 112SYSCTL_DECL(_kern_geom); 113SYSCTL_NODE(_kern_geom, OID_AUTO, part, CTLFLAG_RW, 0, 114 "GEOM_PART stuff"); 115static u_int check_integrity = 1; 116TUNABLE_INT("kern.geom.part.check_integrity", &check_integrity); 117SYSCTL_UINT(_kern_geom_part, OID_AUTO, check_integrity, 118 CTLFLAG_RW | CTLFLAG_TUN, &check_integrity, 1, 119 "Enable integrity checking"); 120 121/* 122 * The GEOM partitioning class. 123 */ 124static g_ctl_req_t g_part_ctlreq; 125static g_ctl_destroy_geom_t g_part_destroy_geom; 126static g_fini_t g_part_fini; 127static g_init_t g_part_init; 128static g_taste_t g_part_taste; 129 130static g_access_t g_part_access; 131static g_dumpconf_t g_part_dumpconf; 132static g_orphan_t g_part_orphan; 133static g_spoiled_t g_part_spoiled; 134static g_start_t g_part_start; 135 136static struct g_class g_part_class = { 137 .name = "PART", 138 .version = G_VERSION, 139 /* Class methods. */ 140 .ctlreq = g_part_ctlreq, 141 .destroy_geom = g_part_destroy_geom, 142 .fini = g_part_fini, 143 .init = g_part_init, 144 .taste = g_part_taste, 145 /* Geom methods. */ 146 .access = g_part_access, 147 .dumpconf = g_part_dumpconf, 148 .orphan = g_part_orphan, 149 .spoiled = g_part_spoiled, 150 .start = g_part_start, 151}; 152 153DECLARE_GEOM_CLASS(g_part_class, g_part); 154MODULE_VERSION(g_part, 0); 155 156/* 157 * Support functions. 158 */ 159 160static void g_part_wither(struct g_geom *, int); 161 162const char * 163g_part_alias_name(enum g_part_alias alias) 164{ 165 int i; 166 167 for (i = 0; i < G_PART_ALIAS_COUNT; i++) { 168 if (g_part_alias_list[i].alias != alias) 169 continue; 170 return (g_part_alias_list[i].lexeme); 171 } 172 173 return (NULL); 174} 175 176void 177g_part_geometry_heads(off_t blocks, u_int sectors, off_t *bestchs, 178 u_int *bestheads) 179{ 180 static u_int candidate_heads[] = { 1, 2, 16, 32, 64, 128, 255, 0 }; 181 off_t chs, cylinders; 182 u_int heads; 183 int idx; 184 185 *bestchs = 0; 186 *bestheads = 0; 187 for (idx = 0; candidate_heads[idx] != 0; idx++) { 188 heads = candidate_heads[idx]; 189 cylinders = blocks / heads / sectors; 190 if (cylinders < heads || cylinders < sectors) 191 break; 192 if (cylinders > 1023) 193 continue; 194 chs = cylinders * heads * sectors; 195 if (chs > *bestchs || (chs == *bestchs && *bestheads == 1)) { 196 *bestchs = chs; 197 *bestheads = heads; 198 } 199 } 200} 201 202static void 203g_part_geometry(struct g_part_table *table, struct g_consumer *cp, 204 off_t blocks) 205{ 206 static u_int candidate_sectors[] = { 1, 9, 17, 33, 63, 0 }; 207 off_t chs, bestchs; 208 u_int heads, sectors; 209 int idx; 210 211 if (g_getattr("GEOM::fwsectors", cp, §ors) != 0 || sectors == 0 || 212 g_getattr("GEOM::fwheads", cp, &heads) != 0 || heads == 0) { 213 table->gpt_fixgeom = 0; 214 table->gpt_heads = 0; 215 table->gpt_sectors = 0; 216 bestchs = 0; 217 for (idx = 0; candidate_sectors[idx] != 0; idx++) { 218 sectors = candidate_sectors[idx]; 219 g_part_geometry_heads(blocks, sectors, &chs, &heads); 220 if (chs == 0) 221 continue; 222 /* 223 * Prefer a geometry with sectors > 1, but only if 224 * it doesn't bump down the number of heads to 1. 225 */ 226 if (chs > bestchs || (chs == bestchs && heads > 1 && 227 table->gpt_sectors == 1)) { 228 bestchs = chs; 229 table->gpt_heads = heads; 230 table->gpt_sectors = sectors; 231 } 232 } 233 /* 234 * If we didn't find a geometry at all, then the disk is 235 * too big. This means we can use the maximum number of 236 * heads and sectors. 237 */ 238 if (bestchs == 0) { 239 table->gpt_heads = 255; 240 table->gpt_sectors = 63; 241 } 242 } else { 243 table->gpt_fixgeom = 1; 244 table->gpt_heads = heads; 245 table->gpt_sectors = sectors; 246 } 247} 248 249#define DPRINTF(...) if (bootverbose) { \ 250 printf("GEOM_PART: " __VA_ARGS__); \ 251} 252 253static int 254g_part_check_integrity(struct g_part_table *table, struct g_consumer *cp) 255{ 256 struct g_part_entry *e1, *e2; 257 struct g_provider *pp; 258 off_t offset; 259 int failed; 260 261 failed = 0; 262 pp = cp->provider; 263 if (table->gpt_last < table->gpt_first) { 264 DPRINTF("last LBA is below first LBA: %jd < %jd\n", 265 (intmax_t)table->gpt_last, (intmax_t)table->gpt_first); 266 failed++; 267 } 268 if (table->gpt_last > pp->mediasize / pp->sectorsize - 1) { 269 DPRINTF("last LBA extends beyond mediasize: " 270 "%jd > %jd\n", (intmax_t)table->gpt_last, 271 (intmax_t)pp->mediasize / pp->sectorsize - 1); 272 failed++; 273 } 274 LIST_FOREACH(e1, &table->gpt_entry, gpe_entry) { 275 if (e1->gpe_deleted || e1->gpe_internal) 276 continue; 277 if (e1->gpe_start < table->gpt_first) { 278 DPRINTF("partition %d has start offset below first " 279 "LBA: %jd < %jd\n", e1->gpe_index, 280 (intmax_t)e1->gpe_start, 281 (intmax_t)table->gpt_first); 282 failed++; 283 } 284 if (e1->gpe_start > table->gpt_last) { 285 DPRINTF("partition %d has start offset beyond last " 286 "LBA: %jd > %jd\n", e1->gpe_index, 287 (intmax_t)e1->gpe_start, 288 (intmax_t)table->gpt_last); 289 failed++; 290 } 291 if (e1->gpe_end < e1->gpe_start) { 292 DPRINTF("partition %d has end offset below start " 293 "offset: %jd < %jd\n", e1->gpe_index, 294 (intmax_t)e1->gpe_end, 295 (intmax_t)e1->gpe_start); 296 failed++; 297 } 298 if (e1->gpe_end > table->gpt_last) { 299 DPRINTF("partition %d has end offset beyond last " 300 "LBA: %jd > %jd\n", e1->gpe_index, 301 (intmax_t)e1->gpe_end, 302 (intmax_t)table->gpt_last); 303 failed++; 304 } 305 if (pp->stripesize > 0) { 306 offset = e1->gpe_start * pp->sectorsize; 307 if (e1->gpe_offset > offset) 308 offset = e1->gpe_offset; 309 if ((offset + pp->stripeoffset) % pp->stripesize) { 310 DPRINTF("partition %d is not aligned on %u " 311 "bytes\n", e1->gpe_index, pp->stripesize); 312 /* Don't treat this as a critical failure */ 313 } 314 } 315 e2 = e1; 316 while ((e2 = LIST_NEXT(e2, gpe_entry)) != NULL) { 317 if (e2->gpe_deleted || e2->gpe_internal) 318 continue; 319 if (e1->gpe_start >= e2->gpe_start && 320 e1->gpe_start <= e2->gpe_end) { 321 DPRINTF("partition %d has start offset inside " 322 "partition %d: start[%d] %jd >= start[%d] " 323 "%jd <= end[%d] %jd\n", 324 e1->gpe_index, e2->gpe_index, 325 e2->gpe_index, (intmax_t)e2->gpe_start, 326 e1->gpe_index, (intmax_t)e1->gpe_start, 327 e2->gpe_index, (intmax_t)e2->gpe_end); 328 failed++; 329 } 330 if (e1->gpe_end >= e2->gpe_start && 331 e1->gpe_end <= e2->gpe_end) { 332 DPRINTF("partition %d has end offset inside " 333 "partition %d: start[%d] %jd >= end[%d] " 334 "%jd <= end[%d] %jd\n", 335 e1->gpe_index, e2->gpe_index, 336 e2->gpe_index, (intmax_t)e2->gpe_start, 337 e1->gpe_index, (intmax_t)e1->gpe_end, 338 e2->gpe_index, (intmax_t)e2->gpe_end); 339 failed++; 340 } 341 if (e1->gpe_start < e2->gpe_start && 342 e1->gpe_end > e2->gpe_end) { 343 DPRINTF("partition %d contains partition %d: " 344 "start[%d] %jd > start[%d] %jd, end[%d] " 345 "%jd < end[%d] %jd\n", 346 e1->gpe_index, e2->gpe_index, 347 e1->gpe_index, (intmax_t)e1->gpe_start, 348 e2->gpe_index, (intmax_t)e2->gpe_start, 349 e2->gpe_index, (intmax_t)e2->gpe_end, 350 e1->gpe_index, (intmax_t)e1->gpe_end); 351 failed++; 352 } 353 } 354 } 355 if (failed != 0) { 356 printf("GEOM_PART: integrity check failed (%s, %s)\n", 357 pp->name, table->gpt_scheme->name); 358 if (check_integrity != 0) 359 return (EINVAL); 360 table->gpt_corrupt = 1; 361 } 362 return (0); 363} 364#undef DPRINTF 365 366struct g_part_entry * 367g_part_new_entry(struct g_part_table *table, int index, quad_t start, 368 quad_t end) 369{ 370 struct g_part_entry *entry, *last; 371 372 last = NULL; 373 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 374 if (entry->gpe_index == index) 375 break; 376 if (entry->gpe_index > index) { 377 entry = NULL; 378 break; 379 } 380 last = entry; 381 } 382 if (entry == NULL) { 383 entry = g_malloc(table->gpt_scheme->gps_entrysz, 384 M_WAITOK | M_ZERO); 385 entry->gpe_index = index; 386 if (last == NULL) 387 LIST_INSERT_HEAD(&table->gpt_entry, entry, gpe_entry); 388 else 389 LIST_INSERT_AFTER(last, entry, gpe_entry); 390 } else 391 entry->gpe_offset = 0; 392 entry->gpe_start = start; 393 entry->gpe_end = end; 394 return (entry); 395} 396 397static void 398g_part_new_provider(struct g_geom *gp, struct g_part_table *table, 399 struct g_part_entry *entry) 400{ 401 struct g_consumer *cp; 402 struct g_provider *pp; 403 struct sbuf *sb; 404 off_t offset; 405 406 cp = LIST_FIRST(&gp->consumer); 407 pp = cp->provider; 408 409 offset = entry->gpe_start * pp->sectorsize; 410 if (entry->gpe_offset < offset) 411 entry->gpe_offset = offset; 412 413 if (entry->gpe_pp == NULL) { 414 sb = sbuf_new_auto(); 415 G_PART_FULLNAME(table, entry, sb, gp->name); 416 sbuf_finish(sb); 417 entry->gpe_pp = g_new_providerf(gp, "%s", sbuf_data(sb)); 418 sbuf_delete(sb); 419 entry->gpe_pp->private = entry; /* Close the circle. */ 420 } 421 entry->gpe_pp->index = entry->gpe_index - 1; /* index is 1-based. */ 422 entry->gpe_pp->mediasize = (entry->gpe_end - entry->gpe_start + 1) * 423 pp->sectorsize; 424 entry->gpe_pp->mediasize -= entry->gpe_offset - offset; 425 entry->gpe_pp->sectorsize = pp->sectorsize; 426 entry->gpe_pp->flags = pp->flags & G_PF_CANDELETE; 427 entry->gpe_pp->stripesize = pp->stripesize; 428 entry->gpe_pp->stripeoffset = pp->stripeoffset + entry->gpe_offset; 429 if (pp->stripesize > 0) 430 entry->gpe_pp->stripeoffset %= pp->stripesize; 431 g_error_provider(entry->gpe_pp, 0); 432} 433 434static struct g_geom* 435g_part_find_geom(const char *name) 436{ 437 struct g_geom *gp; 438 LIST_FOREACH(gp, &g_part_class.geom, geom) { 439 if (!strcmp(name, gp->name)) 440 break; 441 } 442 return (gp); 443} 444 445static int 446g_part_parm_geom(struct gctl_req *req, const char *name, struct g_geom **v) 447{ 448 struct g_geom *gp; 449 const char *gname; 450 451 gname = gctl_get_asciiparam(req, name); 452 if (gname == NULL) 453 return (ENOATTR); 454 if (strncmp(gname, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 455 gname += sizeof(_PATH_DEV) - 1; 456 gp = g_part_find_geom(gname); 457 if (gp == NULL) { 458 gctl_error(req, "%d %s '%s'", EINVAL, name, gname); 459 return (EINVAL); 460 } 461 if ((gp->flags & G_GEOM_WITHER) != 0) { 462 gctl_error(req, "%d %s", ENXIO, gname); 463 return (ENXIO); 464 } 465 *v = gp; 466 return (0); 467} 468 469static int 470g_part_parm_provider(struct gctl_req *req, const char *name, 471 struct g_provider **v) 472{ 473 struct g_provider *pp; 474 const char *pname; 475 476 pname = gctl_get_asciiparam(req, name); 477 if (pname == NULL) 478 return (ENOATTR); 479 if (strncmp(pname, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 480 pname += sizeof(_PATH_DEV) - 1; 481 pp = g_provider_by_name(pname); 482 if (pp == NULL) { 483 gctl_error(req, "%d %s '%s'", EINVAL, name, pname); 484 return (EINVAL); 485 } 486 *v = pp; 487 return (0); 488} 489 490static int 491g_part_parm_quad(struct gctl_req *req, const char *name, quad_t *v) 492{ 493 const char *p; 494 char *x; 495 quad_t q; 496 497 p = gctl_get_asciiparam(req, name); 498 if (p == NULL) 499 return (ENOATTR); 500 q = strtoq(p, &x, 0); 501 if (*x != '\0' || q < 0) { 502 gctl_error(req, "%d %s '%s'", EINVAL, name, p); 503 return (EINVAL); 504 } 505 *v = q; 506 return (0); 507} 508 509static int 510g_part_parm_scheme(struct gctl_req *req, const char *name, 511 struct g_part_scheme **v) 512{ 513 struct g_part_scheme *s; 514 const char *p; 515 516 p = gctl_get_asciiparam(req, name); 517 if (p == NULL) 518 return (ENOATTR); 519 TAILQ_FOREACH(s, &g_part_schemes, scheme_list) { 520 if (s == &g_part_null_scheme) 521 continue; 522 if (!strcasecmp(s->name, p)) 523 break; 524 } 525 if (s == NULL) { 526 gctl_error(req, "%d %s '%s'", EINVAL, name, p); 527 return (EINVAL); 528 } 529 *v = s; 530 return (0); 531} 532 533static int 534g_part_parm_str(struct gctl_req *req, const char *name, const char **v) 535{ 536 const char *p; 537 538 p = gctl_get_asciiparam(req, name); 539 if (p == NULL) 540 return (ENOATTR); 541 /* An empty label is always valid. */ 542 if (strcmp(name, "label") != 0 && p[0] == '\0') { 543 gctl_error(req, "%d %s '%s'", EINVAL, name, p); 544 return (EINVAL); 545 } 546 *v = p; 547 return (0); 548} 549 550static int 551g_part_parm_intmax(struct gctl_req *req, const char *name, u_int *v) 552{ 553 const intmax_t *p; 554 int size; 555 556 p = gctl_get_param(req, name, &size); 557 if (p == NULL) 558 return (ENOATTR); 559 if (size != sizeof(*p) || *p < 0 || *p > INT_MAX) { 560 gctl_error(req, "%d %s '%jd'", EINVAL, name, *p); 561 return (EINVAL); 562 } 563 *v = (u_int)*p; 564 return (0); 565} 566 567static int 568g_part_parm_uint32(struct gctl_req *req, const char *name, u_int *v) 569{ 570 const uint32_t *p; 571 int size; 572 573 p = gctl_get_param(req, name, &size); 574 if (p == NULL) 575 return (ENOATTR); 576 if (size != sizeof(*p) || *p > INT_MAX) { 577 gctl_error(req, "%d %s '%u'", EINVAL, name, (unsigned int)*p); 578 return (EINVAL); 579 } 580 *v = (u_int)*p; 581 return (0); 582} 583 584static int 585g_part_parm_bootcode(struct gctl_req *req, const char *name, const void **v, 586 unsigned int *s) 587{ 588 const void *p; 589 int size; 590 591 p = gctl_get_param(req, name, &size); 592 if (p == NULL) 593 return (ENOATTR); 594 *v = p; 595 *s = size; 596 return (0); 597} 598 599static int 600g_part_probe(struct g_geom *gp, struct g_consumer *cp, int depth) 601{ 602 struct g_part_scheme *iter, *scheme; 603 struct g_part_table *table; 604 int pri, probe; 605 606 table = gp->softc; 607 scheme = (table != NULL) ? table->gpt_scheme : NULL; 608 pri = (scheme != NULL) ? G_PART_PROBE(table, cp) : INT_MIN; 609 if (pri == 0) 610 goto done; 611 if (pri > 0) { /* error */ 612 scheme = NULL; 613 pri = INT_MIN; 614 } 615 616 TAILQ_FOREACH(iter, &g_part_schemes, scheme_list) { 617 if (iter == &g_part_null_scheme) 618 continue; 619 table = (void *)kobj_create((kobj_class_t)iter, M_GEOM, 620 M_WAITOK); 621 table->gpt_gp = gp; 622 table->gpt_scheme = iter; 623 table->gpt_depth = depth; 624 probe = G_PART_PROBE(table, cp); 625 if (probe <= 0 && probe > pri) { 626 pri = probe; 627 scheme = iter; 628 if (gp->softc != NULL) 629 kobj_delete((kobj_t)gp->softc, M_GEOM); 630 gp->softc = table; 631 if (pri == 0) 632 goto done; 633 } else 634 kobj_delete((kobj_t)table, M_GEOM); 635 } 636 637done: 638 return ((scheme == NULL) ? ENXIO : 0); 639} 640 641/* 642 * Control request functions. 643 */ 644 645static int 646g_part_ctl_add(struct gctl_req *req, struct g_part_parms *gpp) 647{ 648 struct g_geom *gp; 649 struct g_provider *pp; 650 struct g_part_entry *delent, *last, *entry; 651 struct g_part_table *table; 652 struct sbuf *sb; 653 quad_t end; 654 unsigned int index; 655 int error; 656 657 gp = gpp->gpp_geom; 658 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 659 g_topology_assert(); 660 661 pp = LIST_FIRST(&gp->consumer)->provider; 662 table = gp->softc; 663 end = gpp->gpp_start + gpp->gpp_size - 1; 664 665 if (gpp->gpp_start < table->gpt_first || 666 gpp->gpp_start > table->gpt_last) { 667 gctl_error(req, "%d start '%jd'", EINVAL, 668 (intmax_t)gpp->gpp_start); 669 return (EINVAL); 670 } 671 if (end < gpp->gpp_start || end > table->gpt_last) { 672 gctl_error(req, "%d size '%jd'", EINVAL, 673 (intmax_t)gpp->gpp_size); 674 return (EINVAL); 675 } 676 if (gpp->gpp_index > table->gpt_entries) { 677 gctl_error(req, "%d index '%d'", EINVAL, gpp->gpp_index); 678 return (EINVAL); 679 } 680 681 delent = last = NULL; 682 index = (gpp->gpp_index > 0) ? gpp->gpp_index : 1; 683 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 684 if (entry->gpe_deleted) { 685 if (entry->gpe_index == index) 686 delent = entry; 687 continue; 688 } 689 if (entry->gpe_index == index) 690 index = entry->gpe_index + 1; 691 if (entry->gpe_index < index) 692 last = entry; 693 if (entry->gpe_internal) 694 continue; 695 if (gpp->gpp_start >= entry->gpe_start && 696 gpp->gpp_start <= entry->gpe_end) { 697 gctl_error(req, "%d start '%jd'", ENOSPC, 698 (intmax_t)gpp->gpp_start); 699 return (ENOSPC); 700 } 701 if (end >= entry->gpe_start && end <= entry->gpe_end) { 702 gctl_error(req, "%d end '%jd'", ENOSPC, (intmax_t)end); 703 return (ENOSPC); 704 } 705 if (gpp->gpp_start < entry->gpe_start && end > entry->gpe_end) { 706 gctl_error(req, "%d size '%jd'", ENOSPC, 707 (intmax_t)gpp->gpp_size); 708 return (ENOSPC); 709 } 710 } 711 if (gpp->gpp_index > 0 && index != gpp->gpp_index) { 712 gctl_error(req, "%d index '%d'", EEXIST, gpp->gpp_index); 713 return (EEXIST); 714 } 715 if (index > table->gpt_entries) { 716 gctl_error(req, "%d index '%d'", ENOSPC, index); 717 return (ENOSPC); 718 } 719 720 entry = (delent == NULL) ? g_malloc(table->gpt_scheme->gps_entrysz, 721 M_WAITOK | M_ZERO) : delent; 722 entry->gpe_index = index; 723 entry->gpe_start = gpp->gpp_start; 724 entry->gpe_end = end; 725 error = G_PART_ADD(table, entry, gpp); 726 if (error) { 727 gctl_error(req, "%d", error); 728 if (delent == NULL) 729 g_free(entry); 730 return (error); 731 } 732 if (delent == NULL) { 733 if (last == NULL) 734 LIST_INSERT_HEAD(&table->gpt_entry, entry, gpe_entry); 735 else 736 LIST_INSERT_AFTER(last, entry, gpe_entry); 737 entry->gpe_created = 1; 738 } else { 739 entry->gpe_deleted = 0; 740 entry->gpe_modified = 1; 741 } 742 g_part_new_provider(gp, table, entry); 743 744 /* Provide feedback if so requested. */ 745 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 746 sb = sbuf_new_auto(); 747 G_PART_FULLNAME(table, entry, sb, gp->name); 748 if (pp->stripesize > 0 && entry->gpe_pp->stripeoffset != 0) 749 sbuf_printf(sb, " added, but partition is not " 750 "aligned on %u bytes\n", pp->stripesize); 751 else 752 sbuf_cat(sb, " added\n"); 753 sbuf_finish(sb); 754 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 755 sbuf_delete(sb); 756 } 757 return (0); 758} 759 760static int 761g_part_ctl_bootcode(struct gctl_req *req, struct g_part_parms *gpp) 762{ 763 struct g_geom *gp; 764 struct g_part_table *table; 765 struct sbuf *sb; 766 int error, sz; 767 768 gp = gpp->gpp_geom; 769 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 770 g_topology_assert(); 771 772 table = gp->softc; 773 sz = table->gpt_scheme->gps_bootcodesz; 774 if (sz == 0) { 775 error = ENODEV; 776 goto fail; 777 } 778 if (gpp->gpp_codesize > sz) { 779 error = EFBIG; 780 goto fail; 781 } 782 783 error = G_PART_BOOTCODE(table, gpp); 784 if (error) 785 goto fail; 786 787 /* Provide feedback if so requested. */ 788 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 789 sb = sbuf_new_auto(); 790 sbuf_printf(sb, "bootcode written to %s\n", gp->name); 791 sbuf_finish(sb); 792 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 793 sbuf_delete(sb); 794 } 795 return (0); 796 797 fail: 798 gctl_error(req, "%d", error); 799 return (error); 800} 801 802static int 803g_part_ctl_commit(struct gctl_req *req, struct g_part_parms *gpp) 804{ 805 struct g_consumer *cp; 806 struct g_geom *gp; 807 struct g_provider *pp; 808 struct g_part_entry *entry, *tmp; 809 struct g_part_table *table; 810 char *buf; 811 int error, i; 812 813 gp = gpp->gpp_geom; 814 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 815 g_topology_assert(); 816 817 table = gp->softc; 818 if (!table->gpt_opened) { 819 gctl_error(req, "%d", EPERM); 820 return (EPERM); 821 } 822 823 g_topology_unlock(); 824 825 cp = LIST_FIRST(&gp->consumer); 826 if ((table->gpt_smhead | table->gpt_smtail) != 0) { 827 pp = cp->provider; 828 buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO); 829 while (table->gpt_smhead != 0) { 830 i = ffs(table->gpt_smhead) - 1; 831 error = g_write_data(cp, i * pp->sectorsize, buf, 832 pp->sectorsize); 833 if (error) { 834 g_free(buf); 835 goto fail; 836 } 837 table->gpt_smhead &= ~(1 << i); 838 } 839 while (table->gpt_smtail != 0) { 840 i = ffs(table->gpt_smtail) - 1; 841 error = g_write_data(cp, pp->mediasize - (i + 1) * 842 pp->sectorsize, buf, pp->sectorsize); 843 if (error) { 844 g_free(buf); 845 goto fail; 846 } 847 table->gpt_smtail &= ~(1 << i); 848 } 849 g_free(buf); 850 } 851 852 if (table->gpt_scheme == &g_part_null_scheme) { 853 g_topology_lock(); 854 g_access(cp, -1, -1, -1); 855 g_part_wither(gp, ENXIO); 856 return (0); 857 } 858 859 error = G_PART_WRITE(table, cp); 860 if (error) 861 goto fail; 862 863 LIST_FOREACH_SAFE(entry, &table->gpt_entry, gpe_entry, tmp) { 864 if (!entry->gpe_deleted) { 865 entry->gpe_created = 0; 866 entry->gpe_modified = 0; 867 continue; 868 } 869 LIST_REMOVE(entry, gpe_entry); 870 g_free(entry); 871 } 872 table->gpt_created = 0; 873 table->gpt_opened = 0; 874 875 g_topology_lock(); 876 g_access(cp, -1, -1, -1); 877 return (0); 878 879fail: 880 g_topology_lock(); 881 gctl_error(req, "%d", error); 882 return (error); 883} 884 885static int 886g_part_ctl_create(struct gctl_req *req, struct g_part_parms *gpp) 887{ 888 struct g_consumer *cp; 889 struct g_geom *gp; 890 struct g_provider *pp; 891 struct g_part_scheme *scheme; 892 struct g_part_table *null, *table; 893 struct sbuf *sb; 894 int attr, error; 895 896 pp = gpp->gpp_provider; 897 scheme = gpp->gpp_scheme; 898 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, pp->name)); 899 g_topology_assert(); 900 901 /* Check that there isn't already a g_part geom on the provider. */ 902 gp = g_part_find_geom(pp->name); 903 if (gp != NULL) { 904 null = gp->softc; 905 if (null->gpt_scheme != &g_part_null_scheme) { 906 gctl_error(req, "%d geom '%s'", EEXIST, pp->name); 907 return (EEXIST); 908 } 909 } else 910 null = NULL; 911 912 if ((gpp->gpp_parms & G_PART_PARM_ENTRIES) && 913 (gpp->gpp_entries < scheme->gps_minent || 914 gpp->gpp_entries > scheme->gps_maxent)) { 915 gctl_error(req, "%d entries '%d'", EINVAL, gpp->gpp_entries); 916 return (EINVAL); 917 } 918 919 if (null == NULL) 920 gp = g_new_geomf(&g_part_class, "%s", pp->name); 921 gp->softc = kobj_create((kobj_class_t)gpp->gpp_scheme, M_GEOM, 922 M_WAITOK); 923 table = gp->softc; 924 table->gpt_gp = gp; 925 table->gpt_scheme = gpp->gpp_scheme; 926 table->gpt_entries = (gpp->gpp_parms & G_PART_PARM_ENTRIES) ? 927 gpp->gpp_entries : scheme->gps_minent; 928 LIST_INIT(&table->gpt_entry); 929 if (null == NULL) { 930 cp = g_new_consumer(gp); 931 error = g_attach(cp, pp); 932 if (error == 0) 933 error = g_access(cp, 1, 1, 1); 934 if (error != 0) { 935 g_part_wither(gp, error); 936 gctl_error(req, "%d geom '%s'", error, pp->name); 937 return (error); 938 } 939 table->gpt_opened = 1; 940 } else { 941 cp = LIST_FIRST(&gp->consumer); 942 table->gpt_opened = null->gpt_opened; 943 table->gpt_smhead = null->gpt_smhead; 944 table->gpt_smtail = null->gpt_smtail; 945 } 946 947 g_topology_unlock(); 948 949 /* Make sure the provider has media. */ 950 if (pp->mediasize == 0 || pp->sectorsize == 0) { 951 error = ENODEV; 952 goto fail; 953 } 954 955 /* Make sure we can nest and if so, determine our depth. */ 956 error = g_getattr("PART::isleaf", cp, &attr); 957 if (!error && attr) { 958 error = ENODEV; 959 goto fail; 960 } 961 error = g_getattr("PART::depth", cp, &attr); 962 table->gpt_depth = (!error) ? attr + 1 : 0; 963 964 /* 965 * Synthesize a disk geometry. Some partitioning schemes 966 * depend on it and since some file systems need it even 967 * when the partitition scheme doesn't, we do it here in 968 * scheme-independent code. 969 */ 970 g_part_geometry(table, cp, pp->mediasize / pp->sectorsize); 971 972 error = G_PART_CREATE(table, gpp); 973 if (error) 974 goto fail; 975 976 g_topology_lock(); 977 978 table->gpt_created = 1; 979 if (null != NULL) 980 kobj_delete((kobj_t)null, M_GEOM); 981 982 /* 983 * Support automatic commit by filling in the gpp_geom 984 * parameter. 985 */ 986 gpp->gpp_parms |= G_PART_PARM_GEOM; 987 gpp->gpp_geom = gp; 988 989 /* Provide feedback if so requested. */ 990 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 991 sb = sbuf_new_auto(); 992 sbuf_printf(sb, "%s created\n", gp->name); 993 sbuf_finish(sb); 994 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 995 sbuf_delete(sb); 996 } 997 return (0); 998 999fail: 1000 g_topology_lock(); 1001 if (null == NULL) { 1002 g_access(cp, -1, -1, -1); 1003 g_part_wither(gp, error); 1004 } else { 1005 kobj_delete((kobj_t)gp->softc, M_GEOM); 1006 gp->softc = null; 1007 } 1008 gctl_error(req, "%d provider", error); 1009 return (error); 1010} 1011 1012static int 1013g_part_ctl_delete(struct gctl_req *req, struct g_part_parms *gpp) 1014{ 1015 struct g_geom *gp; 1016 struct g_provider *pp; 1017 struct g_part_entry *entry; 1018 struct g_part_table *table; 1019 struct sbuf *sb; 1020 1021 gp = gpp->gpp_geom; 1022 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1023 g_topology_assert(); 1024 1025 table = gp->softc; 1026 1027 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1028 if (entry->gpe_deleted || entry->gpe_internal) 1029 continue; 1030 if (entry->gpe_index == gpp->gpp_index) 1031 break; 1032 } 1033 if (entry == NULL) { 1034 gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index); 1035 return (ENOENT); 1036 } 1037 1038 pp = entry->gpe_pp; 1039 if (pp != NULL) { 1040 if (pp->acr > 0 || pp->acw > 0 || pp->ace > 0) { 1041 gctl_error(req, "%d", EBUSY); 1042 return (EBUSY); 1043 } 1044 1045 pp->private = NULL; 1046 entry->gpe_pp = NULL; 1047 } 1048 1049 if (pp != NULL) 1050 g_wither_provider(pp, ENXIO); 1051 1052 /* Provide feedback if so requested. */ 1053 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1054 sb = sbuf_new_auto(); 1055 G_PART_FULLNAME(table, entry, sb, gp->name); 1056 sbuf_cat(sb, " deleted\n"); 1057 sbuf_finish(sb); 1058 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1059 sbuf_delete(sb); 1060 } 1061 1062 if (entry->gpe_created) { 1063 LIST_REMOVE(entry, gpe_entry); 1064 g_free(entry); 1065 } else { 1066 entry->gpe_modified = 0; 1067 entry->gpe_deleted = 1; 1068 } 1069 return (0); 1070} 1071 1072static int 1073g_part_ctl_destroy(struct gctl_req *req, struct g_part_parms *gpp) 1074{ 1075 struct g_consumer *cp; 1076 struct g_geom *gp; 1077 struct g_provider *pp; 1078 struct g_part_entry *entry, *tmp; 1079 struct g_part_table *null, *table; 1080 struct sbuf *sb; 1081 int error; 1082 1083 gp = gpp->gpp_geom; 1084 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1085 g_topology_assert(); 1086 1087 table = gp->softc; 1088 /* Check for busy providers. */ 1089 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1090 if (entry->gpe_deleted || entry->gpe_internal) 1091 continue; 1092 if (gpp->gpp_force) { 1093 pp = entry->gpe_pp; 1094 if (pp == NULL) 1095 continue; 1096 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 1097 continue; 1098 } 1099 gctl_error(req, "%d", EBUSY); 1100 return (EBUSY); 1101 } 1102 1103 if (gpp->gpp_force) { 1104 /* Destroy all providers. */ 1105 LIST_FOREACH_SAFE(entry, &table->gpt_entry, gpe_entry, tmp) { 1106 pp = entry->gpe_pp; 1107 if (pp != NULL) { 1108 pp->private = NULL; 1109 g_wither_provider(pp, ENXIO); 1110 } 1111 LIST_REMOVE(entry, gpe_entry); 1112 g_free(entry); 1113 } 1114 } 1115 1116 error = G_PART_DESTROY(table, gpp); 1117 if (error) { 1118 gctl_error(req, "%d", error); 1119 return (error); 1120 } 1121 1122 gp->softc = kobj_create((kobj_class_t)&g_part_null_scheme, M_GEOM, 1123 M_WAITOK); 1124 null = gp->softc; 1125 null->gpt_gp = gp; 1126 null->gpt_scheme = &g_part_null_scheme; 1127 LIST_INIT(&null->gpt_entry); 1128 1129 cp = LIST_FIRST(&gp->consumer); 1130 pp = cp->provider; 1131 null->gpt_last = pp->mediasize / pp->sectorsize - 1; 1132 1133 null->gpt_depth = table->gpt_depth; 1134 null->gpt_opened = table->gpt_opened; 1135 null->gpt_smhead = table->gpt_smhead; 1136 null->gpt_smtail = table->gpt_smtail; 1137 1138 while ((entry = LIST_FIRST(&table->gpt_entry)) != NULL) { 1139 LIST_REMOVE(entry, gpe_entry); 1140 g_free(entry); 1141 } 1142 kobj_delete((kobj_t)table, M_GEOM); 1143 1144 /* Provide feedback if so requested. */ 1145 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1146 sb = sbuf_new_auto(); 1147 sbuf_printf(sb, "%s destroyed\n", gp->name); 1148 sbuf_finish(sb); 1149 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1150 sbuf_delete(sb); 1151 } 1152 return (0); 1153} 1154 1155static int 1156g_part_ctl_modify(struct gctl_req *req, struct g_part_parms *gpp) 1157{ 1158 struct g_geom *gp; 1159 struct g_part_entry *entry; 1160 struct g_part_table *table; 1161 struct sbuf *sb; 1162 int error; 1163 1164 gp = gpp->gpp_geom; 1165 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1166 g_topology_assert(); 1167 1168 table = gp->softc; 1169 1170 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1171 if (entry->gpe_deleted || entry->gpe_internal) 1172 continue; 1173 if (entry->gpe_index == gpp->gpp_index) 1174 break; 1175 } 1176 if (entry == NULL) { 1177 gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index); 1178 return (ENOENT); 1179 } 1180 1181 error = G_PART_MODIFY(table, entry, gpp); 1182 if (error) { 1183 gctl_error(req, "%d", error); 1184 return (error); 1185 } 1186 1187 if (!entry->gpe_created) 1188 entry->gpe_modified = 1; 1189 1190 /* Provide feedback if so requested. */ 1191 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1192 sb = sbuf_new_auto(); 1193 G_PART_FULLNAME(table, entry, sb, gp->name); 1194 sbuf_cat(sb, " modified\n"); 1195 sbuf_finish(sb); 1196 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1197 sbuf_delete(sb); 1198 } 1199 return (0); 1200} 1201 1202static int 1203g_part_ctl_move(struct gctl_req *req, struct g_part_parms *gpp) 1204{ 1205 gctl_error(req, "%d verb 'move'", ENOSYS); 1206 return (ENOSYS); 1207} 1208 1209static int 1210g_part_ctl_recover(struct gctl_req *req, struct g_part_parms *gpp) 1211{ 1212 struct g_part_table *table; 1213 struct g_geom *gp; 1214 struct sbuf *sb; 1215 int error, recovered; 1216 1217 gp = gpp->gpp_geom; 1218 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1219 g_topology_assert(); 1220 table = gp->softc; 1221 error = recovered = 0; 1222 1223 if (table->gpt_corrupt) { 1224 error = G_PART_RECOVER(table); 1225 if (error == 0) 1226 error = g_part_check_integrity(table, 1227 LIST_FIRST(&gp->consumer)); 1228 if (error) { 1229 gctl_error(req, "%d recovering '%s' failed", 1230 error, gp->name); 1231 return (error); 1232 } 1233 recovered = 1; 1234 } 1235 /* Provide feedback if so requested. */ 1236 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1237 sb = sbuf_new_auto(); 1238 if (recovered) 1239 sbuf_printf(sb, "%s recovered\n", gp->name); 1240 else 1241 sbuf_printf(sb, "%s recovering is not needed\n", 1242 gp->name); 1243 sbuf_finish(sb); 1244 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1245 sbuf_delete(sb); 1246 } 1247 return (0); 1248} 1249 1250static int 1251g_part_ctl_resize(struct gctl_req *req, struct g_part_parms *gpp) 1252{ 1253 struct g_geom *gp; 1254 struct g_provider *pp; 1255 struct g_part_entry *pe, *entry; 1256 struct g_part_table *table; 1257 struct sbuf *sb; 1258 quad_t end; 1259 int error; 1260 off_t mediasize; 1261 1262 gp = gpp->gpp_geom; 1263 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1264 g_topology_assert(); 1265 table = gp->softc; 1266 1267 /* check gpp_index */ 1268 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1269 if (entry->gpe_deleted || entry->gpe_internal) 1270 continue; 1271 if (entry->gpe_index == gpp->gpp_index) 1272 break; 1273 } 1274 if (entry == NULL) { 1275 gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index); 1276 return (ENOENT); 1277 } 1278 1279 /* check gpp_size */ 1280 end = entry->gpe_start + gpp->gpp_size - 1; 1281 if (gpp->gpp_size < 1 || end > table->gpt_last) { 1282 gctl_error(req, "%d size '%jd'", EINVAL, 1283 (intmax_t)gpp->gpp_size); 1284 return (EINVAL); 1285 } 1286 1287 LIST_FOREACH(pe, &table->gpt_entry, gpe_entry) { 1288 if (pe->gpe_deleted || pe->gpe_internal || pe == entry) 1289 continue; 1290 if (end >= pe->gpe_start && end <= pe->gpe_end) { 1291 gctl_error(req, "%d end '%jd'", ENOSPC, 1292 (intmax_t)end); 1293 return (ENOSPC); 1294 } 1295 if (entry->gpe_start < pe->gpe_start && end > pe->gpe_end) { 1296 gctl_error(req, "%d size '%jd'", ENOSPC, 1297 (intmax_t)gpp->gpp_size); 1298 return (ENOSPC); 1299 } 1300 } 1301 1302 pp = entry->gpe_pp; 1303 if ((g_debugflags & 16) == 0 && 1304 (pp->acr > 0 || pp->acw > 0 || pp->ace > 0)) { 1305 if (entry->gpe_end - entry->gpe_start + 1 > gpp->gpp_size) { 1306 /* Deny shrinking of an opened partition. */ 1307 gctl_error(req, "%d", EBUSY); 1308 return (EBUSY); 1309 } 1310 } 1311 1312 error = G_PART_RESIZE(table, entry, gpp); 1313 if (error) { 1314 gctl_error(req, "%d", error); 1315 return (error); 1316 } 1317 1318 if (!entry->gpe_created) 1319 entry->gpe_modified = 1; 1320 1321 /* update mediasize of changed provider */ 1322 mediasize = (entry->gpe_end - entry->gpe_start + 1) * 1323 pp->sectorsize; 1324 g_resize_provider(pp, mediasize); 1325 1326 /* Provide feedback if so requested. */ 1327 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1328 sb = sbuf_new_auto(); 1329 G_PART_FULLNAME(table, entry, sb, gp->name); 1330 sbuf_cat(sb, " resized\n"); 1331 sbuf_finish(sb); 1332 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1333 sbuf_delete(sb); 1334 } 1335 return (0); 1336} 1337 1338static int 1339g_part_ctl_setunset(struct gctl_req *req, struct g_part_parms *gpp, 1340 unsigned int set) 1341{ 1342 struct g_geom *gp; 1343 struct g_part_entry *entry; 1344 struct g_part_table *table; 1345 struct sbuf *sb; 1346 int error; 1347 1348 gp = gpp->gpp_geom; 1349 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1350 g_topology_assert(); 1351 1352 table = gp->softc; 1353 1354 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1355 if (entry->gpe_deleted || entry->gpe_internal) 1356 continue; 1357 if (entry->gpe_index == gpp->gpp_index) 1358 break; 1359 } 1360 if (entry == NULL) { 1361 gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index); 1362 return (ENOENT); 1363 } 1364 1365 error = G_PART_SETUNSET(table, entry, gpp->gpp_attrib, set); 1366 if (error) { 1367 gctl_error(req, "%d attrib '%s'", error, gpp->gpp_attrib); 1368 return (error); 1369 } 1370 1371 /* Provide feedback if so requested. */ 1372 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1373 sb = sbuf_new_auto(); 1374 sbuf_printf(sb, "%s %sset on ", gpp->gpp_attrib, 1375 (set) ? "" : "un"); 1376 G_PART_FULLNAME(table, entry, sb, gp->name); 1377 sbuf_printf(sb, "\n"); 1378 sbuf_finish(sb); 1379 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1380 sbuf_delete(sb); 1381 } 1382 return (0); 1383} 1384 1385static int 1386g_part_ctl_undo(struct gctl_req *req, struct g_part_parms *gpp) 1387{ 1388 struct g_consumer *cp; 1389 struct g_provider *pp; 1390 struct g_geom *gp; 1391 struct g_part_entry *entry, *tmp; 1392 struct g_part_table *table; 1393 int error, reprobe; 1394 1395 gp = gpp->gpp_geom; 1396 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1397 g_topology_assert(); 1398 1399 table = gp->softc; 1400 if (!table->gpt_opened) { 1401 gctl_error(req, "%d", EPERM); 1402 return (EPERM); 1403 } 1404 1405 cp = LIST_FIRST(&gp->consumer); 1406 LIST_FOREACH_SAFE(entry, &table->gpt_entry, gpe_entry, tmp) { 1407 entry->gpe_modified = 0; 1408 if (entry->gpe_created) { 1409 pp = entry->gpe_pp; 1410 if (pp != NULL) { 1411 pp->private = NULL; 1412 entry->gpe_pp = NULL; 1413 g_wither_provider(pp, ENXIO); 1414 } 1415 entry->gpe_deleted = 1; 1416 } 1417 if (entry->gpe_deleted) { 1418 LIST_REMOVE(entry, gpe_entry); 1419 g_free(entry); 1420 } 1421 } 1422 1423 g_topology_unlock(); 1424 1425 reprobe = (table->gpt_scheme == &g_part_null_scheme || 1426 table->gpt_created) ? 1 : 0; 1427 1428 if (reprobe) { 1429 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1430 if (entry->gpe_internal) 1431 continue; 1432 error = EBUSY; 1433 goto fail; 1434 } 1435 while ((entry = LIST_FIRST(&table->gpt_entry)) != NULL) { 1436 LIST_REMOVE(entry, gpe_entry); 1437 g_free(entry); 1438 } 1439 error = g_part_probe(gp, cp, table->gpt_depth); 1440 if (error) { 1441 g_topology_lock(); 1442 g_access(cp, -1, -1, -1); 1443 g_part_wither(gp, error); 1444 return (0); 1445 } 1446 table = gp->softc; 1447 1448 /* 1449 * Synthesize a disk geometry. Some partitioning schemes 1450 * depend on it and since some file systems need it even 1451 * when the partitition scheme doesn't, we do it here in 1452 * scheme-independent code. 1453 */ 1454 pp = cp->provider; 1455 g_part_geometry(table, cp, pp->mediasize / pp->sectorsize); 1456 } 1457 1458 error = G_PART_READ(table, cp); 1459 if (error) 1460 goto fail; 1461 error = g_part_check_integrity(table, cp); 1462 if (error) 1463 goto fail; 1464 1465 g_topology_lock(); 1466 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1467 if (!entry->gpe_internal) 1468 g_part_new_provider(gp, table, entry); 1469 } 1470 1471 table->gpt_opened = 0; 1472 g_access(cp, -1, -1, -1); 1473 return (0); 1474 1475fail: 1476 g_topology_lock(); 1477 gctl_error(req, "%d", error); 1478 return (error); 1479} 1480 1481static void 1482g_part_wither(struct g_geom *gp, int error) 1483{ 1484 struct g_part_entry *entry; 1485 struct g_part_table *table; 1486 1487 table = gp->softc; 1488 if (table != NULL) { 1489 G_PART_DESTROY(table, NULL); 1490 while ((entry = LIST_FIRST(&table->gpt_entry)) != NULL) { 1491 LIST_REMOVE(entry, gpe_entry); 1492 g_free(entry); 1493 } 1494 if (gp->softc != NULL) { 1495 kobj_delete((kobj_t)gp->softc, M_GEOM); 1496 gp->softc = NULL; 1497 } 1498 } 1499 g_wither_geom(gp, error); 1500} 1501 1502/* 1503 * Class methods. 1504 */ 1505 1506static void 1507g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb) 1508{ 1509 struct g_part_parms gpp; 1510 struct g_part_table *table; 1511 struct gctl_req_arg *ap; 1512 enum g_part_ctl ctlreq; 1513 unsigned int i, mparms, oparms, parm; 1514 int auto_commit, close_on_error; 1515 int error, modifies; 1516 1517 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s,%s)", __func__, mp->name, verb)); 1518 g_topology_assert(); 1519 1520 ctlreq = G_PART_CTL_NONE; 1521 modifies = 1; 1522 mparms = 0; 1523 oparms = G_PART_PARM_FLAGS | G_PART_PARM_OUTPUT | G_PART_PARM_VERSION; 1524 switch (*verb) { 1525 case 'a': 1526 if (!strcmp(verb, "add")) { 1527 ctlreq = G_PART_CTL_ADD; 1528 mparms |= G_PART_PARM_GEOM | G_PART_PARM_SIZE | 1529 G_PART_PARM_START | G_PART_PARM_TYPE; 1530 oparms |= G_PART_PARM_INDEX | G_PART_PARM_LABEL; 1531 } 1532 break; 1533 case 'b': 1534 if (!strcmp(verb, "bootcode")) { 1535 ctlreq = G_PART_CTL_BOOTCODE; 1536 mparms |= G_PART_PARM_GEOM | G_PART_PARM_BOOTCODE; 1537 } 1538 break; 1539 case 'c': 1540 if (!strcmp(verb, "commit")) { 1541 ctlreq = G_PART_CTL_COMMIT; 1542 mparms |= G_PART_PARM_GEOM; 1543 modifies = 0; 1544 } else if (!strcmp(verb, "create")) { 1545 ctlreq = G_PART_CTL_CREATE; 1546 mparms |= G_PART_PARM_PROVIDER | G_PART_PARM_SCHEME; 1547 oparms |= G_PART_PARM_ENTRIES; 1548 } 1549 break; 1550 case 'd': 1551 if (!strcmp(verb, "delete")) { 1552 ctlreq = G_PART_CTL_DELETE; 1553 mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX; 1554 } else if (!strcmp(verb, "destroy")) { 1555 ctlreq = G_PART_CTL_DESTROY; 1556 mparms |= G_PART_PARM_GEOM; 1557 oparms |= G_PART_PARM_FORCE; 1558 } 1559 break; 1560 case 'm': 1561 if (!strcmp(verb, "modify")) { 1562 ctlreq = G_PART_CTL_MODIFY; 1563 mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX; 1564 oparms |= G_PART_PARM_LABEL | G_PART_PARM_TYPE; 1565 } else if (!strcmp(verb, "move")) { 1566 ctlreq = G_PART_CTL_MOVE; 1567 mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX; 1568 } 1569 break; 1570 case 'r': 1571 if (!strcmp(verb, "recover")) { 1572 ctlreq = G_PART_CTL_RECOVER; 1573 mparms |= G_PART_PARM_GEOM; 1574 } else if (!strcmp(verb, "resize")) { 1575 ctlreq = G_PART_CTL_RESIZE; 1576 mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX | 1577 G_PART_PARM_SIZE; 1578 } 1579 break; 1580 case 's': 1581 if (!strcmp(verb, "set")) { 1582 ctlreq = G_PART_CTL_SET; 1583 mparms |= G_PART_PARM_ATTRIB | G_PART_PARM_GEOM | 1584 G_PART_PARM_INDEX; 1585 } 1586 break; 1587 case 'u': 1588 if (!strcmp(verb, "undo")) { 1589 ctlreq = G_PART_CTL_UNDO; 1590 mparms |= G_PART_PARM_GEOM; 1591 modifies = 0; 1592 } else if (!strcmp(verb, "unset")) { 1593 ctlreq = G_PART_CTL_UNSET; 1594 mparms |= G_PART_PARM_ATTRIB | G_PART_PARM_GEOM | 1595 G_PART_PARM_INDEX; 1596 } 1597 break; 1598 } 1599 if (ctlreq == G_PART_CTL_NONE) { 1600 gctl_error(req, "%d verb '%s'", EINVAL, verb); 1601 return; 1602 } 1603 1604 bzero(&gpp, sizeof(gpp)); 1605 for (i = 0; i < req->narg; i++) { 1606 ap = &req->arg[i]; 1607 parm = 0; 1608 switch (ap->name[0]) { 1609 case 'a': 1610 if (!strcmp(ap->name, "arg0")) { 1611 parm = mparms & 1612 (G_PART_PARM_GEOM | G_PART_PARM_PROVIDER); 1613 } 1614 if (!strcmp(ap->name, "attrib")) 1615 parm = G_PART_PARM_ATTRIB; 1616 break; 1617 case 'b': 1618 if (!strcmp(ap->name, "bootcode")) 1619 parm = G_PART_PARM_BOOTCODE; 1620 break; 1621 case 'c': 1622 if (!strcmp(ap->name, "class")) 1623 continue; 1624 break; 1625 case 'e': 1626 if (!strcmp(ap->name, "entries")) 1627 parm = G_PART_PARM_ENTRIES; 1628 break; 1629 case 'f': 1630 if (!strcmp(ap->name, "flags")) 1631 parm = G_PART_PARM_FLAGS; 1632 else if (!strcmp(ap->name, "force")) 1633 parm = G_PART_PARM_FORCE; 1634 break; 1635 case 'i': 1636 if (!strcmp(ap->name, "index")) 1637 parm = G_PART_PARM_INDEX; 1638 break; 1639 case 'l': 1640 if (!strcmp(ap->name, "label")) 1641 parm = G_PART_PARM_LABEL; 1642 break; 1643 case 'o': 1644 if (!strcmp(ap->name, "output")) 1645 parm = G_PART_PARM_OUTPUT; 1646 break; 1647 case 's': 1648 if (!strcmp(ap->name, "scheme")) 1649 parm = G_PART_PARM_SCHEME; 1650 else if (!strcmp(ap->name, "size")) 1651 parm = G_PART_PARM_SIZE; 1652 else if (!strcmp(ap->name, "start")) 1653 parm = G_PART_PARM_START; 1654 break; 1655 case 't': 1656 if (!strcmp(ap->name, "type")) 1657 parm = G_PART_PARM_TYPE; 1658 break; 1659 case 'v': 1660 if (!strcmp(ap->name, "verb")) 1661 continue; 1662 else if (!strcmp(ap->name, "version")) 1663 parm = G_PART_PARM_VERSION; 1664 break; 1665 } 1666 if ((parm & (mparms | oparms)) == 0) { 1667 gctl_error(req, "%d param '%s'", EINVAL, ap->name); 1668 return; 1669 } 1670 switch (parm) { 1671 case G_PART_PARM_ATTRIB: 1672 error = g_part_parm_str(req, ap->name, 1673 &gpp.gpp_attrib); 1674 break; 1675 case G_PART_PARM_BOOTCODE: 1676 error = g_part_parm_bootcode(req, ap->name, 1677 &gpp.gpp_codeptr, &gpp.gpp_codesize); 1678 break; 1679 case G_PART_PARM_ENTRIES: 1680 error = g_part_parm_intmax(req, ap->name, 1681 &gpp.gpp_entries); 1682 break; 1683 case G_PART_PARM_FLAGS: 1684 error = g_part_parm_str(req, ap->name, &gpp.gpp_flags); 1685 break; 1686 case G_PART_PARM_FORCE: 1687 error = g_part_parm_uint32(req, ap->name, 1688 &gpp.gpp_force); 1689 break; 1690 case G_PART_PARM_GEOM: 1691 error = g_part_parm_geom(req, ap->name, &gpp.gpp_geom); 1692 break; 1693 case G_PART_PARM_INDEX: 1694 error = g_part_parm_intmax(req, ap->name, 1695 &gpp.gpp_index); 1696 break; 1697 case G_PART_PARM_LABEL: 1698 error = g_part_parm_str(req, ap->name, &gpp.gpp_label); 1699 break; 1700 case G_PART_PARM_OUTPUT: 1701 error = 0; /* Write-only parameter */ 1702 break; 1703 case G_PART_PARM_PROVIDER: 1704 error = g_part_parm_provider(req, ap->name, 1705 &gpp.gpp_provider); 1706 break; 1707 case G_PART_PARM_SCHEME: 1708 error = g_part_parm_scheme(req, ap->name, 1709 &gpp.gpp_scheme); 1710 break; 1711 case G_PART_PARM_SIZE: 1712 error = g_part_parm_quad(req, ap->name, &gpp.gpp_size); 1713 break; 1714 case G_PART_PARM_START: 1715 error = g_part_parm_quad(req, ap->name, 1716 &gpp.gpp_start); 1717 break; 1718 case G_PART_PARM_TYPE: 1719 error = g_part_parm_str(req, ap->name, &gpp.gpp_type); 1720 break; 1721 case G_PART_PARM_VERSION: 1722 error = g_part_parm_uint32(req, ap->name, 1723 &gpp.gpp_version); 1724 break; 1725 default: 1726 error = EDOOFUS; 1727 gctl_error(req, "%d %s", error, ap->name); 1728 break; 1729 } 1730 if (error != 0) { 1731 if (error == ENOATTR) { 1732 gctl_error(req, "%d param '%s'", error, 1733 ap->name); 1734 } 1735 return; 1736 } 1737 gpp.gpp_parms |= parm; 1738 } 1739 if ((gpp.gpp_parms & mparms) != mparms) { 1740 parm = mparms - (gpp.gpp_parms & mparms); 1741 gctl_error(req, "%d param '%x'", ENOATTR, parm); 1742 return; 1743 } 1744 1745 /* Obtain permissions if possible/necessary. */ 1746 close_on_error = 0; 1747 table = NULL; 1748 if (modifies && (gpp.gpp_parms & G_PART_PARM_GEOM)) { 1749 table = gpp.gpp_geom->softc; 1750 if (table != NULL && table->gpt_corrupt && 1751 ctlreq != G_PART_CTL_DESTROY && 1752 ctlreq != G_PART_CTL_RECOVER) { 1753 gctl_error(req, "%d table '%s' is corrupt", 1754 EPERM, gpp.gpp_geom->name); 1755 return; 1756 } 1757 if (table != NULL && !table->gpt_opened) { 1758 error = g_access(LIST_FIRST(&gpp.gpp_geom->consumer), 1759 1, 1, 1); 1760 if (error) { 1761 gctl_error(req, "%d geom '%s'", error, 1762 gpp.gpp_geom->name); 1763 return; 1764 } 1765 table->gpt_opened = 1; 1766 close_on_error = 1; 1767 } 1768 } 1769 1770 /* Allow the scheme to check or modify the parameters. */ 1771 if (table != NULL) { 1772 error = G_PART_PRECHECK(table, ctlreq, &gpp); 1773 if (error) { 1774 gctl_error(req, "%d pre-check failed", error); 1775 goto out; 1776 } 1777 } else 1778 error = EDOOFUS; /* Prevent bogus uninit. warning. */ 1779 1780 switch (ctlreq) { 1781 case G_PART_CTL_NONE: 1782 panic("%s", __func__); 1783 case G_PART_CTL_ADD: 1784 error = g_part_ctl_add(req, &gpp); 1785 break; 1786 case G_PART_CTL_BOOTCODE: 1787 error = g_part_ctl_bootcode(req, &gpp); 1788 break; 1789 case G_PART_CTL_COMMIT: 1790 error = g_part_ctl_commit(req, &gpp); 1791 break; 1792 case G_PART_CTL_CREATE: 1793 error = g_part_ctl_create(req, &gpp); 1794 break; 1795 case G_PART_CTL_DELETE: 1796 error = g_part_ctl_delete(req, &gpp); 1797 break; 1798 case G_PART_CTL_DESTROY: 1799 error = g_part_ctl_destroy(req, &gpp); 1800 break; 1801 case G_PART_CTL_MODIFY: 1802 error = g_part_ctl_modify(req, &gpp); 1803 break; 1804 case G_PART_CTL_MOVE: 1805 error = g_part_ctl_move(req, &gpp); 1806 break; 1807 case G_PART_CTL_RECOVER: 1808 error = g_part_ctl_recover(req, &gpp); 1809 break; 1810 case G_PART_CTL_RESIZE: 1811 error = g_part_ctl_resize(req, &gpp); 1812 break; 1813 case G_PART_CTL_SET: 1814 error = g_part_ctl_setunset(req, &gpp, 1); 1815 break; 1816 case G_PART_CTL_UNDO: 1817 error = g_part_ctl_undo(req, &gpp); 1818 break; 1819 case G_PART_CTL_UNSET: 1820 error = g_part_ctl_setunset(req, &gpp, 0); 1821 break; 1822 } 1823 1824 /* Implement automatic commit. */ 1825 if (!error) { 1826 auto_commit = (modifies && 1827 (gpp.gpp_parms & G_PART_PARM_FLAGS) && 1828 strchr(gpp.gpp_flags, 'C') != NULL) ? 1 : 0; 1829 if (auto_commit) { 1830 KASSERT(gpp.gpp_parms & G_PART_PARM_GEOM, ("%s", 1831 __func__)); 1832 error = g_part_ctl_commit(req, &gpp); 1833 } 1834 } 1835 1836 out: 1837 if (error && close_on_error) { 1838 g_access(LIST_FIRST(&gpp.gpp_geom->consumer), -1, -1, -1); 1839 table->gpt_opened = 0; 1840 } 1841} 1842 1843static int 1844g_part_destroy_geom(struct gctl_req *req, struct g_class *mp, 1845 struct g_geom *gp) 1846{ 1847 1848 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s,%s)", __func__, mp->name, gp->name)); 1849 g_topology_assert(); 1850 1851 g_part_wither(gp, EINVAL); 1852 return (0); 1853} 1854 1855static struct g_geom * 1856g_part_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 1857{ 1858 struct g_consumer *cp; 1859 struct g_geom *gp; 1860 struct g_part_entry *entry; 1861 struct g_part_table *table; 1862 struct root_hold_token *rht; 1863 int attr, depth; 1864 int error; 1865 1866 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s,%s)", __func__, mp->name, pp->name)); 1867 g_topology_assert(); 1868 1869 /* Skip providers that are already open for writing. */ 1870 if (pp->acw > 0) 1871 return (NULL); 1872 1873 /* 1874 * Create a GEOM with consumer and hook it up to the provider. 1875 * With that we become part of the topology. Optain read access 1876 * to the provider. 1877 */ 1878 gp = g_new_geomf(mp, "%s", pp->name); 1879 cp = g_new_consumer(gp); 1880 error = g_attach(cp, pp); 1881 if (error == 0) 1882 error = g_access(cp, 1, 0, 0); 1883 if (error != 0) { 1884 g_part_wither(gp, error); 1885 return (NULL); 1886 } 1887 1888 rht = root_mount_hold(mp->name); 1889 g_topology_unlock(); 1890 1891 /* 1892 * Short-circuit the whole probing galore when there's no 1893 * media present. 1894 */ 1895 if (pp->mediasize == 0 || pp->sectorsize == 0) { 1896 error = ENODEV; 1897 goto fail; 1898 } 1899 1900 /* Make sure we can nest and if so, determine our depth. */ 1901 error = g_getattr("PART::isleaf", cp, &attr); 1902 if (!error && attr) { 1903 error = ENODEV; 1904 goto fail; 1905 } 1906 error = g_getattr("PART::depth", cp, &attr); 1907 depth = (!error) ? attr + 1 : 0; 1908 1909 error = g_part_probe(gp, cp, depth); 1910 if (error) 1911 goto fail; 1912 1913 table = gp->softc; 1914 1915 /* 1916 * Synthesize a disk geometry. Some partitioning schemes 1917 * depend on it and since some file systems need it even 1918 * when the partitition scheme doesn't, we do it here in 1919 * scheme-independent code. 1920 */ 1921 g_part_geometry(table, cp, pp->mediasize / pp->sectorsize); 1922 1923 error = G_PART_READ(table, cp); 1924 if (error) 1925 goto fail; 1926 error = g_part_check_integrity(table, cp); 1927 if (error) 1928 goto fail; 1929 1930 g_topology_lock(); 1931 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1932 if (!entry->gpe_internal) 1933 g_part_new_provider(gp, table, entry); 1934 } 1935 1936 root_mount_rel(rht); 1937 g_access(cp, -1, 0, 0); 1938 return (gp); 1939 1940 fail: 1941 g_topology_lock(); 1942 root_mount_rel(rht); 1943 g_access(cp, -1, 0, 0); 1944 g_part_wither(gp, error); 1945 return (NULL); 1946} 1947 1948/* 1949 * Geom methods. 1950 */ 1951 1952static int 1953g_part_access(struct g_provider *pp, int dr, int dw, int de) 1954{ 1955 struct g_consumer *cp; 1956 1957 G_PART_TRACE((G_T_ACCESS, "%s(%s,%d,%d,%d)", __func__, pp->name, dr, 1958 dw, de)); 1959 1960 cp = LIST_FIRST(&pp->geom->consumer); 1961 1962 /* We always gain write-exclusive access. */ 1963 return (g_access(cp, dr, dw, dw + de)); 1964} 1965 1966static void 1967g_part_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 1968 struct g_consumer *cp, struct g_provider *pp) 1969{ 1970 char buf[64]; 1971 struct g_part_entry *entry; 1972 struct g_part_table *table; 1973 1974 KASSERT(sb != NULL && gp != NULL, ("%s", __func__)); 1975 table = gp->softc; 1976 1977 if (indent == NULL) { 1978 KASSERT(cp == NULL && pp != NULL, ("%s", __func__)); 1979 entry = pp->private; 1980 if (entry == NULL) 1981 return; 1982 sbuf_printf(sb, " i %u o %ju ty %s", entry->gpe_index, 1983 (uintmax_t)entry->gpe_offset, 1984 G_PART_TYPE(table, entry, buf, sizeof(buf))); 1985 /* 1986 * libdisk compatibility quirk - the scheme dumps the 1987 * slicer name and partition type in a way that is 1988 * compatible with libdisk. When libdisk is not used 1989 * anymore, this should go away. 1990 */ 1991 G_PART_DUMPCONF(table, entry, sb, indent); 1992 } else if (cp != NULL) { /* Consumer configuration. */ 1993 KASSERT(pp == NULL, ("%s", __func__)); 1994 /* none */ 1995 } else if (pp != NULL) { /* Provider configuration. */ 1996 entry = pp->private; 1997 if (entry == NULL) 1998 return; 1999 sbuf_printf(sb, "%s<start>%ju</start>\n", indent, 2000 (uintmax_t)entry->gpe_start); 2001 sbuf_printf(sb, "%s<end>%ju</end>\n", indent, 2002 (uintmax_t)entry->gpe_end); 2003 sbuf_printf(sb, "%s<index>%u</index>\n", indent, 2004 entry->gpe_index); 2005 sbuf_printf(sb, "%s<type>%s</type>\n", indent, 2006 G_PART_TYPE(table, entry, buf, sizeof(buf))); 2007 sbuf_printf(sb, "%s<offset>%ju</offset>\n", indent, 2008 (uintmax_t)entry->gpe_offset); 2009 sbuf_printf(sb, "%s<length>%ju</length>\n", indent, 2010 (uintmax_t)pp->mediasize); 2011 G_PART_DUMPCONF(table, entry, sb, indent); 2012 } else { /* Geom configuration. */ 2013 sbuf_printf(sb, "%s<scheme>%s</scheme>\n", indent, 2014 table->gpt_scheme->name); 2015 sbuf_printf(sb, "%s<entries>%u</entries>\n", indent, 2016 table->gpt_entries); 2017 sbuf_printf(sb, "%s<first>%ju</first>\n", indent, 2018 (uintmax_t)table->gpt_first); 2019 sbuf_printf(sb, "%s<last>%ju</last>\n", indent, 2020 (uintmax_t)table->gpt_last); 2021 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", indent, 2022 table->gpt_sectors); 2023 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", indent, 2024 table->gpt_heads); 2025 sbuf_printf(sb, "%s<state>%s</state>\n", indent, 2026 table->gpt_corrupt ? "CORRUPT": "OK"); 2027 sbuf_printf(sb, "%s<modified>%s</modified>\n", indent, 2028 table->gpt_opened ? "true": "false"); 2029 G_PART_DUMPCONF(table, NULL, sb, indent); 2030 } 2031} 2032 2033static void 2034g_part_orphan(struct g_consumer *cp) 2035{ 2036 struct g_provider *pp; 2037 struct g_part_table *table; 2038 2039 pp = cp->provider; 2040 KASSERT(pp != NULL, ("%s", __func__)); 2041 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, pp->name)); 2042 g_topology_assert(); 2043 2044 KASSERT(pp->error != 0, ("%s", __func__)); 2045 table = cp->geom->softc; 2046 if (table != NULL && table->gpt_opened) 2047 g_access(cp, -1, -1, -1); 2048 g_part_wither(cp->geom, pp->error); 2049} 2050 2051static void 2052g_part_spoiled(struct g_consumer *cp) 2053{ 2054 2055 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, cp->provider->name)); 2056 g_topology_assert(); 2057 2058 g_part_wither(cp->geom, ENXIO); 2059} 2060 2061static void 2062g_part_start(struct bio *bp) 2063{ 2064 struct bio *bp2; 2065 struct g_consumer *cp; 2066 struct g_geom *gp; 2067 struct g_part_entry *entry; 2068 struct g_part_table *table; 2069 struct g_kerneldump *gkd; 2070 struct g_provider *pp; 2071 char buf[64]; 2072 2073 pp = bp->bio_to; 2074 gp = pp->geom; 2075 table = gp->softc; 2076 cp = LIST_FIRST(&gp->consumer); 2077 2078 G_PART_TRACE((G_T_BIO, "%s: cmd=%d, provider=%s", __func__, bp->bio_cmd, 2079 pp->name)); 2080 2081 entry = pp->private; 2082 if (entry == NULL) { 2083 g_io_deliver(bp, ENXIO); 2084 return; 2085 } 2086 2087 switch(bp->bio_cmd) { 2088 case BIO_DELETE: 2089 case BIO_READ: 2090 case BIO_WRITE: 2091 if (bp->bio_offset >= pp->mediasize) { 2092 g_io_deliver(bp, EIO); 2093 return; 2094 } 2095 bp2 = g_clone_bio(bp); 2096 if (bp2 == NULL) { 2097 g_io_deliver(bp, ENOMEM); 2098 return; 2099 } 2100 if (bp2->bio_offset + bp2->bio_length > pp->mediasize) 2101 bp2->bio_length = pp->mediasize - bp2->bio_offset; 2102 bp2->bio_done = g_std_done; 2103 bp2->bio_offset += entry->gpe_offset; 2104 g_io_request(bp2, cp); 2105 return; 2106 case BIO_FLUSH: 2107 break; 2108 case BIO_GETATTR: 2109 if (g_handleattr_int(bp, "GEOM::fwheads", table->gpt_heads)) 2110 return; 2111 if (g_handleattr_int(bp, "GEOM::fwsectors", table->gpt_sectors)) 2112 return; 2113 if (g_handleattr_int(bp, "PART::isleaf", table->gpt_isleaf)) 2114 return; 2115 if (g_handleattr_int(bp, "PART::depth", table->gpt_depth)) 2116 return; 2117 if (g_handleattr_str(bp, "PART::scheme", 2118 table->gpt_scheme->name)) 2119 return; 2120 if (g_handleattr_str(bp, "PART::type", 2121 G_PART_TYPE(table, entry, buf, sizeof(buf)))) 2122 return; 2123 if (!strcmp("GEOM::kerneldump", bp->bio_attribute)) { 2124 /* 2125 * Check that the partition is suitable for kernel 2126 * dumps. Typically only swap partitions should be 2127 * used. If the request comes from the nested scheme 2128 * we allow dumping there as well. 2129 */ 2130 if ((bp->bio_from == NULL || 2131 bp->bio_from->geom->class != &g_part_class) && 2132 G_PART_DUMPTO(table, entry) == 0) { 2133 g_io_deliver(bp, ENODEV); 2134 printf("GEOM_PART: Partition '%s' not suitable" 2135 " for kernel dumps (wrong type?)\n", 2136 pp->name); 2137 return; 2138 } 2139 gkd = (struct g_kerneldump *)bp->bio_data; 2140 if (gkd->offset >= pp->mediasize) { 2141 g_io_deliver(bp, EIO); 2142 return; 2143 } 2144 if (gkd->offset + gkd->length > pp->mediasize) 2145 gkd->length = pp->mediasize - gkd->offset; 2146 gkd->offset += entry->gpe_offset; 2147 } 2148 break; 2149 default: 2150 g_io_deliver(bp, EOPNOTSUPP); 2151 return; 2152 } 2153 2154 bp2 = g_clone_bio(bp); 2155 if (bp2 == NULL) { 2156 g_io_deliver(bp, ENOMEM); 2157 return; 2158 } 2159 bp2->bio_done = g_std_done; 2160 g_io_request(bp2, cp); 2161} 2162 2163static void 2164g_part_init(struct g_class *mp) 2165{ 2166 2167 TAILQ_INSERT_HEAD(&g_part_schemes, &g_part_null_scheme, scheme_list); 2168} 2169 2170static void 2171g_part_fini(struct g_class *mp) 2172{ 2173 2174 TAILQ_REMOVE(&g_part_schemes, &g_part_null_scheme, scheme_list); 2175} 2176 2177static void 2178g_part_unload_event(void *arg, int flag) 2179{ 2180 struct g_consumer *cp; 2181 struct g_geom *gp; 2182 struct g_provider *pp; 2183 struct g_part_scheme *scheme; 2184 struct g_part_table *table; 2185 uintptr_t *xchg; 2186 int acc, error; 2187 2188 if (flag == EV_CANCEL) 2189 return; 2190 2191 xchg = arg; 2192 error = 0; 2193 scheme = (void *)(*xchg); 2194 2195 g_topology_assert(); 2196 2197 LIST_FOREACH(gp, &g_part_class.geom, geom) { 2198 table = gp->softc; 2199 if (table->gpt_scheme != scheme) 2200 continue; 2201 2202 acc = 0; 2203 LIST_FOREACH(pp, &gp->provider, provider) 2204 acc += pp->acr + pp->acw + pp->ace; 2205 LIST_FOREACH(cp, &gp->consumer, consumer) 2206 acc += cp->acr + cp->acw + cp->ace; 2207 2208 if (!acc) 2209 g_part_wither(gp, ENOSYS); 2210 else 2211 error = EBUSY; 2212 } 2213 2214 if (!error) 2215 TAILQ_REMOVE(&g_part_schemes, scheme, scheme_list); 2216 2217 *xchg = error; 2218} 2219 2220int 2221g_part_modevent(module_t mod, int type, struct g_part_scheme *scheme) 2222{ 2223 struct g_part_scheme *iter; 2224 uintptr_t arg; 2225 int error; 2226 2227 error = 0; 2228 switch (type) { 2229 case MOD_LOAD: 2230 TAILQ_FOREACH(iter, &g_part_schemes, scheme_list) { 2231 if (scheme == iter) { 2232 printf("GEOM_PART: scheme %s is already " 2233 "registered!\n", scheme->name); 2234 break; 2235 } 2236 } 2237 if (iter == NULL) { 2238 TAILQ_INSERT_TAIL(&g_part_schemes, scheme, 2239 scheme_list); 2240 g_retaste(&g_part_class); 2241 } 2242 break; 2243 case MOD_UNLOAD: 2244 arg = (uintptr_t)scheme; 2245 error = g_waitfor_event(g_part_unload_event, &arg, M_WAITOK, 2246 NULL); 2247 if (error == 0) 2248 error = arg; 2249 break; 2250 default: 2251 error = EOPNOTSUPP; 2252 break; 2253 } 2254 2255 return (error); 2256} 2257