Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/geom/part/g_part.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2002, 2005-2009 Marcel Moolenaar 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/bio.h> 34 #include <sys/endian.h> 35 #include <sys/kernel.h> 36 #include <sys/kobj.h> 37 #include <sys/limits.h> 38 #include <sys/lock.h> 39 #include <sys/malloc.h> 40 #include <sys/mutex.h> 41 #include <sys/queue.h> 42 #include <sys/sbuf.h> 43 #include <sys/sysctl.h> 44 #include <sys/systm.h> 45 #include <sys/uuid.h> 46 #include <geom/geom.h> 47 #include <geom/geom_ctl.h> 48 #include <geom/geom_int.h> 49 #include <geom/part/g_part.h> 50 51 #include "g_part_if.h" 52 53 static kobj_method_t g_part_null_methods[] = { 54 { 0, 0 } 55 }; 56 57 static struct g_part_scheme g_part_null_scheme = { 58 "(none)", 59 g_part_null_methods, 60 sizeof(struct g_part_table), 61 }; 62 63 TAILQ_HEAD(, g_part_scheme) g_part_schemes = 64 TAILQ_HEAD_INITIALIZER(g_part_schemes); 65 66 struct g_part_alias_list { 67 const char *lexeme; 68 enum g_part_alias alias; 69 } g_part_alias_list[G_PART_ALIAS_COUNT] = { 70 { "apple-apfs", G_PART_ALIAS_APPLE_APFS }, 71 { "apple-boot", G_PART_ALIAS_APPLE_BOOT }, 72 { "apple-core-storage", G_PART_ALIAS_APPLE_CORE_STORAGE }, 73 { "apple-hfs", G_PART_ALIAS_APPLE_HFS }, 74 { "apple-label", G_PART_ALIAS_APPLE_LABEL }, 75 { "apple-raid", G_PART_ALIAS_APPLE_RAID }, 76 { "apple-raid-offline", G_PART_ALIAS_APPLE_RAID_OFFLINE }, 77 { "apple-tv-recovery", G_PART_ALIAS_APPLE_TV_RECOVERY }, 78 { "apple-ufs", G_PART_ALIAS_APPLE_UFS }, 79 { "apple-zfs", G_PART_ALIAS_APPLE_ZFS }, 80 { "bios-boot", G_PART_ALIAS_BIOS_BOOT }, 81 { "chromeos-firmware", G_PART_ALIAS_CHROMEOS_FIRMWARE }, 82 { "chromeos-kernel", G_PART_ALIAS_CHROMEOS_KERNEL }, 83 { "chromeos-reserved", G_PART_ALIAS_CHROMEOS_RESERVED }, 84 { "chromeos-root", G_PART_ALIAS_CHROMEOS_ROOT }, 85 { "dragonfly-ccd", G_PART_ALIAS_DFBSD_CCD }, 86 { "dragonfly-hammer", G_PART_ALIAS_DFBSD_HAMMER }, 87 { "dragonfly-hammer2", G_PART_ALIAS_DFBSD_HAMMER2 }, 88 { "dragonfly-label32", G_PART_ALIAS_DFBSD }, 89 { "dragonfly-label64", G_PART_ALIAS_DFBSD64 }, 90 { "dragonfly-legacy", G_PART_ALIAS_DFBSD_LEGACY }, 91 { "dragonfly-swap", G_PART_ALIAS_DFBSD_SWAP }, 92 { "dragonfly-ufs", G_PART_ALIAS_DFBSD_UFS }, 93 { "dragonfly-vinum", G_PART_ALIAS_DFBSD_VINUM }, 94 { "ebr", G_PART_ALIAS_EBR }, 95 { "efi", G_PART_ALIAS_EFI }, 96 { "fat16", G_PART_ALIAS_MS_FAT16 }, 97 { "fat32", G_PART_ALIAS_MS_FAT32 }, 98 { "fat32lba", G_PART_ALIAS_MS_FAT32LBA }, 99 { "freebsd", G_PART_ALIAS_FREEBSD }, 100 { "freebsd-boot", G_PART_ALIAS_FREEBSD_BOOT }, 101 { "freebsd-nandfs", G_PART_ALIAS_FREEBSD_NANDFS }, 102 { "freebsd-swap", G_PART_ALIAS_FREEBSD_SWAP }, 103 { "freebsd-ufs", G_PART_ALIAS_FREEBSD_UFS }, 104 { "freebsd-vinum", G_PART_ALIAS_FREEBSD_VINUM }, 105 { "freebsd-zfs", G_PART_ALIAS_FREEBSD_ZFS }, 106 { "hifive-fsbl", G_PART_ALIAS_HIFIVE_FSBL }, 107 { "hifive-bbl", G_PART_ALIAS_HIFIVE_BBL }, 108 { "linux-data", G_PART_ALIAS_LINUX_DATA }, 109 { "linux-lvm", G_PART_ALIAS_LINUX_LVM }, 110 { "linux-raid", G_PART_ALIAS_LINUX_RAID }, 111 { "linux-swap", G_PART_ALIAS_LINUX_SWAP }, 112 { "mbr", G_PART_ALIAS_MBR }, 113 { "ms-basic-data", G_PART_ALIAS_MS_BASIC_DATA }, 114 { "ms-ldm-data", G_PART_ALIAS_MS_LDM_DATA }, 115 { "ms-ldm-metadata", G_PART_ALIAS_MS_LDM_METADATA }, 116 { "ms-recovery", G_PART_ALIAS_MS_RECOVERY }, 117 { "ms-reserved", G_PART_ALIAS_MS_RESERVED }, 118 { "ms-spaces", G_PART_ALIAS_MS_SPACES }, 119 { "netbsd-ccd", G_PART_ALIAS_NETBSD_CCD }, 120 { "netbsd-cgd", G_PART_ALIAS_NETBSD_CGD }, 121 { "netbsd-ffs", G_PART_ALIAS_NETBSD_FFS }, 122 { "netbsd-lfs", G_PART_ALIAS_NETBSD_LFS }, 123 { "netbsd-raid", G_PART_ALIAS_NETBSD_RAID }, 124 { "netbsd-swap", G_PART_ALIAS_NETBSD_SWAP }, 125 { "ntfs", G_PART_ALIAS_MS_NTFS }, 126 { "openbsd-data", G_PART_ALIAS_OPENBSD_DATA }, 127 { "prep-boot", G_PART_ALIAS_PREP_BOOT }, 128 { "solaris-boot", G_PART_ALIAS_SOLARIS_BOOT }, 129 { "solaris-root", G_PART_ALIAS_SOLARIS_ROOT }, 130 { "solaris-swap", G_PART_ALIAS_SOLARIS_SWAP }, 131 { "solaris-backup", G_PART_ALIAS_SOLARIS_BACKUP }, 132 { "solaris-var", G_PART_ALIAS_SOLARIS_VAR }, 133 { "solaris-home", G_PART_ALIAS_SOLARIS_HOME }, 134 { "solaris-altsec", G_PART_ALIAS_SOLARIS_ALTSEC }, 135 { "solaris-reserved", G_PART_ALIAS_SOLARIS_RESERVED }, 136 { "vmware-reserved", G_PART_ALIAS_VMRESERVED }, 137 { "vmware-vmfs", G_PART_ALIAS_VMFS }, 138 { "vmware-vmkdiag", G_PART_ALIAS_VMKDIAG }, 139 { "vmware-vsanhdr", G_PART_ALIAS_VMVSANHDR }, 140 }; 141 142 SYSCTL_DECL(_kern_geom); 143 SYSCTL_NODE(_kern_geom, OID_AUTO, part, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 144 "GEOM_PART stuff"); 145 u_int geom_part_check_integrity = 1; 146 SYSCTL_UINT(_kern_geom_part, OID_AUTO, check_integrity, 147 CTLFLAG_RWTUN, &geom_part_check_integrity, 1, 148 "Enable integrity checking"); 149 static u_int auto_resize = 1; 150 SYSCTL_UINT(_kern_geom_part, OID_AUTO, auto_resize, 151 CTLFLAG_RWTUN, &auto_resize, 1, 152 "Enable auto resize"); 153 static u_int allow_nesting = 0; 154 SYSCTL_UINT(_kern_geom_part, OID_AUTO, allow_nesting, 155 CTLFLAG_RWTUN, &allow_nesting, 0, 156 "Allow additional levels of nesting"); 157 char g_part_separator[MAXPATHLEN] = ""; 158 SYSCTL_STRING(_kern_geom_part, OID_AUTO, separator, 159 CTLFLAG_RDTUN, &g_part_separator, sizeof(g_part_separator), 160 "Partition name separator"); 161 162 /* 163 * The GEOM partitioning class. 164 */ 165 static g_ctl_req_t g_part_ctlreq; 166 static g_ctl_destroy_geom_t g_part_destroy_geom; 167 static g_fini_t g_part_fini; 168 static g_init_t g_part_init; 169 static g_taste_t g_part_taste; 170 171 static g_access_t g_part_access; 172 static g_dumpconf_t g_part_dumpconf; 173 static g_orphan_t g_part_orphan; 174 static g_spoiled_t g_part_spoiled; 175 static g_start_t g_part_start; 176 static g_resize_t g_part_resize; 177 static g_ioctl_t g_part_ioctl; 178 179 static struct g_class g_part_class = { 180 .name = "PART", 181 .version = G_VERSION, 182 /* Class methods. */ 183 .ctlreq = g_part_ctlreq, 184 .destroy_geom = g_part_destroy_geom, 185 .fini = g_part_fini, 186 .init = g_part_init, 187 .taste = g_part_taste, 188 /* Geom methods. */ 189 .access = g_part_access, 190 .dumpconf = g_part_dumpconf, 191 .orphan = g_part_orphan, 192 .spoiled = g_part_spoiled, 193 .start = g_part_start, 194 .resize = g_part_resize, 195 .ioctl = g_part_ioctl, 196 }; 197 198 DECLARE_GEOM_CLASS(g_part_class, g_part); 199 MODULE_VERSION(g_part, 0); 200 201 /* 202 * Support functions. 203 */ 204 205 static void g_part_wither(struct g_geom *, int); 206 207 const char * 208 g_part_alias_name(enum g_part_alias alias) 209 { 210 int i; 211 212 for (i = 0; i < G_PART_ALIAS_COUNT; i++) { 213 if (g_part_alias_list[i].alias != alias) 214 continue; 215 return (g_part_alias_list[i].lexeme); 216 } 217 218 return (NULL); 219 } 220 221 void 222 g_part_geometry_heads(off_t blocks, u_int sectors, off_t *bestchs, 223 u_int *bestheads) 224 { 225 static u_int candidate_heads[] = { 1, 2, 16, 32, 64, 128, 255, 0 }; 226 off_t chs, cylinders; 227 u_int heads; 228 int idx; 229 230 *bestchs = 0; 231 *bestheads = 0; 232 for (idx = 0; candidate_heads[idx] != 0; idx++) { 233 heads = candidate_heads[idx]; 234 cylinders = blocks / heads / sectors; 235 if (cylinders < heads || cylinders < sectors) 236 break; 237 if (cylinders > 1023) 238 continue; 239 chs = cylinders * heads * sectors; 240 if (chs > *bestchs || (chs == *bestchs && *bestheads == 1)) { 241 *bestchs = chs; 242 *bestheads = heads; 243 } 244 } 245 } 246 247 static void 248 g_part_geometry(struct g_part_table *table, struct g_consumer *cp, 249 off_t blocks) 250 { 251 static u_int candidate_sectors[] = { 1, 9, 17, 33, 63, 0 }; 252 off_t chs, bestchs; 253 u_int heads, sectors; 254 int idx; 255 256 if (g_getattr("GEOM::fwsectors", cp, §ors) != 0 || sectors == 0 || 257 g_getattr("GEOM::fwheads", cp, &heads) != 0 || heads == 0) { 258 table->gpt_fixgeom = 0; 259 table->gpt_heads = 0; 260 table->gpt_sectors = 0; 261 bestchs = 0; 262 for (idx = 0; candidate_sectors[idx] != 0; idx++) { 263 sectors = candidate_sectors[idx]; 264 g_part_geometry_heads(blocks, sectors, &chs, &heads); 265 if (chs == 0) 266 continue; 267 /* 268 * Prefer a geometry with sectors > 1, but only if 269 * it doesn't bump down the number of heads to 1. 270 */ 271 if (chs > bestchs || (chs == bestchs && heads > 1 && 272 table->gpt_sectors == 1)) { 273 bestchs = chs; 274 table->gpt_heads = heads; 275 table->gpt_sectors = sectors; 276 } 277 } 278 /* 279 * If we didn't find a geometry at all, then the disk is 280 * too big. This means we can use the maximum number of 281 * heads and sectors. 282 */ 283 if (bestchs == 0) { 284 table->gpt_heads = 255; 285 table->gpt_sectors = 63; 286 } 287 } else { 288 table->gpt_fixgeom = 1; 289 table->gpt_heads = heads; 290 table->gpt_sectors = sectors; 291 } 292 } 293 294 static void 295 g_part_get_physpath_done(struct bio *bp) 296 { 297 struct g_geom *gp; 298 struct g_part_entry *entry; 299 struct g_part_table *table; 300 struct g_provider *pp; 301 struct bio *pbp; 302 303 pbp = bp->bio_parent; 304 pp = pbp->bio_to; 305 gp = pp->geom; 306 table = gp->softc; 307 entry = pp->private; 308 309 if (bp->bio_error == 0) { 310 char *end; 311 size_t len, remainder; 312 len = strlcat(bp->bio_data, "/", bp->bio_length); 313 if (len < bp->bio_length) { 314 end = bp->bio_data + len; 315 remainder = bp->bio_length - len; 316 G_PART_NAME(table, entry, end, remainder); 317 } 318 } 319 g_std_done(bp); 320 } 321 322 #define DPRINTF(...) if (bootverbose) { \ 323 printf("GEOM_PART: " __VA_ARGS__); \ 324 } 325 326 static int 327 g_part_check_integrity(struct g_part_table *table, struct g_consumer *cp) 328 { 329 struct g_part_entry *e1, *e2; 330 struct g_provider *pp; 331 off_t offset; 332 int failed; 333 334 failed = 0; 335 pp = cp->provider; 336 if (table->gpt_last < table->gpt_first) { 337 DPRINTF("last LBA is below first LBA: %jd < %jd\n", 338 (intmax_t)table->gpt_last, (intmax_t)table->gpt_first); 339 failed++; 340 } 341 if (table->gpt_last > pp->mediasize / pp->sectorsize - 1) { 342 DPRINTF("last LBA extends beyond mediasize: " 343 "%jd > %jd\n", (intmax_t)table->gpt_last, 344 (intmax_t)pp->mediasize / pp->sectorsize - 1); 345 failed++; 346 } 347 LIST_FOREACH(e1, &table->gpt_entry, gpe_entry) { 348 if (e1->gpe_deleted || e1->gpe_internal) 349 continue; 350 if (e1->gpe_start < table->gpt_first) { 351 DPRINTF("partition %d has start offset below first " 352 "LBA: %jd < %jd\n", e1->gpe_index, 353 (intmax_t)e1->gpe_start, 354 (intmax_t)table->gpt_first); 355 failed++; 356 } 357 if (e1->gpe_start > table->gpt_last) { 358 DPRINTF("partition %d has start offset beyond last " 359 "LBA: %jd > %jd\n", e1->gpe_index, 360 (intmax_t)e1->gpe_start, 361 (intmax_t)table->gpt_last); 362 failed++; 363 } 364 if (e1->gpe_end < e1->gpe_start) { 365 DPRINTF("partition %d has end offset below start " 366 "offset: %jd < %jd\n", e1->gpe_index, 367 (intmax_t)e1->gpe_end, 368 (intmax_t)e1->gpe_start); 369 failed++; 370 } 371 if (e1->gpe_end > table->gpt_last) { 372 DPRINTF("partition %d has end offset beyond last " 373 "LBA: %jd > %jd\n", e1->gpe_index, 374 (intmax_t)e1->gpe_end, 375 (intmax_t)table->gpt_last); 376 failed++; 377 } 378 if (pp->stripesize > 0) { 379 offset = e1->gpe_start * pp->sectorsize; 380 if (e1->gpe_offset > offset) 381 offset = e1->gpe_offset; 382 if ((offset + pp->stripeoffset) % pp->stripesize) { 383 DPRINTF("partition %d on (%s, %s) is not " 384 "aligned on %ju bytes\n", e1->gpe_index, 385 pp->name, table->gpt_scheme->name, 386 (uintmax_t)pp->stripesize); 387 /* Don't treat this as a critical failure */ 388 } 389 } 390 e2 = e1; 391 while ((e2 = LIST_NEXT(e2, gpe_entry)) != NULL) { 392 if (e2->gpe_deleted || e2->gpe_internal) 393 continue; 394 if (e1->gpe_start >= e2->gpe_start && 395 e1->gpe_start <= e2->gpe_end) { 396 DPRINTF("partition %d has start offset inside " 397 "partition %d: start[%d] %jd >= start[%d] " 398 "%jd <= end[%d] %jd\n", 399 e1->gpe_index, e2->gpe_index, 400 e2->gpe_index, (intmax_t)e2->gpe_start, 401 e1->gpe_index, (intmax_t)e1->gpe_start, 402 e2->gpe_index, (intmax_t)e2->gpe_end); 403 failed++; 404 } 405 if (e1->gpe_end >= e2->gpe_start && 406 e1->gpe_end <= e2->gpe_end) { 407 DPRINTF("partition %d has end offset inside " 408 "partition %d: start[%d] %jd >= end[%d] " 409 "%jd <= end[%d] %jd\n", 410 e1->gpe_index, e2->gpe_index, 411 e2->gpe_index, (intmax_t)e2->gpe_start, 412 e1->gpe_index, (intmax_t)e1->gpe_end, 413 e2->gpe_index, (intmax_t)e2->gpe_end); 414 failed++; 415 } 416 if (e1->gpe_start < e2->gpe_start && 417 e1->gpe_end > e2->gpe_end) { 418 DPRINTF("partition %d contains partition %d: " 419 "start[%d] %jd > start[%d] %jd, end[%d] " 420 "%jd < end[%d] %jd\n", 421 e1->gpe_index, e2->gpe_index, 422 e1->gpe_index, (intmax_t)e1->gpe_start, 423 e2->gpe_index, (intmax_t)e2->gpe_start, 424 e2->gpe_index, (intmax_t)e2->gpe_end, 425 e1->gpe_index, (intmax_t)e1->gpe_end); 426 failed++; 427 } 428 } 429 } 430 if (failed != 0) { 431 printf("GEOM_PART: integrity check failed (%s, %s)\n", 432 pp->name, table->gpt_scheme->name); 433 if (geom_part_check_integrity != 0) 434 return (EINVAL); 435 table->gpt_corrupt = 1; 436 } 437 return (0); 438 } 439 #undef DPRINTF 440 441 struct g_part_entry * 442 g_part_new_entry(struct g_part_table *table, int index, quad_t start, 443 quad_t end) 444 { 445 struct g_part_entry *entry, *last; 446 447 last = NULL; 448 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 449 if (entry->gpe_index == index) 450 break; 451 if (entry->gpe_index > index) { 452 entry = NULL; 453 break; 454 } 455 last = entry; 456 } 457 if (entry == NULL) { 458 entry = g_malloc(table->gpt_scheme->gps_entrysz, 459 M_WAITOK | M_ZERO); 460 entry->gpe_index = index; 461 if (last == NULL) 462 LIST_INSERT_HEAD(&table->gpt_entry, entry, gpe_entry); 463 else 464 LIST_INSERT_AFTER(last, entry, gpe_entry); 465 } else 466 entry->gpe_offset = 0; 467 entry->gpe_start = start; 468 entry->gpe_end = end; 469 return (entry); 470 } 471 472 static void 473 g_part_new_provider(struct g_geom *gp, struct g_part_table *table, 474 struct g_part_entry *entry) 475 { 476 struct g_consumer *cp; 477 struct g_provider *pp; 478 struct g_geom_alias *gap; 479 off_t offset; 480 481 cp = LIST_FIRST(&gp->consumer); 482 pp = cp->provider; 483 484 offset = entry->gpe_start * pp->sectorsize; 485 if (entry->gpe_offset < offset) 486 entry->gpe_offset = offset; 487 488 if (entry->gpe_pp == NULL) { 489 entry->gpe_pp = G_PART_NEW_PROVIDER(table, gp, entry, gp->name); 490 /* 491 * If our parent provider had any aliases, then copy them to our 492 * provider so when geom DEV tastes things later, they will be 493 * there for it to create the aliases with those name used in 494 * place of the geom's name we use to create the provider. The 495 * kobj interface that generates names makes this awkward. 496 */ 497 LIST_FOREACH(gap, &pp->aliases, ga_next) 498 G_PART_ADD_ALIAS(table, entry->gpe_pp, entry, gap->ga_alias); 499 entry->gpe_pp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE; 500 entry->gpe_pp->private = entry; /* Close the circle. */ 501 } 502 entry->gpe_pp->index = entry->gpe_index - 1; /* index is 1-based. */ 503 entry->gpe_pp->mediasize = (entry->gpe_end - entry->gpe_start + 1) * 504 pp->sectorsize; 505 entry->gpe_pp->mediasize -= entry->gpe_offset - offset; 506 entry->gpe_pp->sectorsize = pp->sectorsize; 507 entry->gpe_pp->stripesize = pp->stripesize; 508 entry->gpe_pp->stripeoffset = pp->stripeoffset + entry->gpe_offset; 509 if (pp->stripesize > 0) 510 entry->gpe_pp->stripeoffset %= pp->stripesize; 511 entry->gpe_pp->flags |= pp->flags & G_PF_ACCEPT_UNMAPPED; 512 g_error_provider(entry->gpe_pp, 0); 513 } 514 515 static struct g_geom* 516 g_part_find_geom(const char *name) 517 { 518 struct g_geom *gp; 519 LIST_FOREACH(gp, &g_part_class.geom, geom) { 520 if ((gp->flags & G_GEOM_WITHER) == 0 && 521 strcmp(name, gp->name) == 0) 522 break; 523 } 524 return (gp); 525 } 526 527 static int 528 g_part_parm_geom(struct gctl_req *req, const char *name, struct g_geom **v) 529 { 530 struct g_geom *gp; 531 const char *gname; 532 533 gname = gctl_get_asciiparam(req, name); 534 if (gname == NULL) 535 return (ENOATTR); 536 if (strncmp(gname, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 537 gname += sizeof(_PATH_DEV) - 1; 538 gp = g_part_find_geom(gname); 539 if (gp == NULL) { 540 gctl_error(req, "%d %s '%s'", EINVAL, name, gname); 541 return (EINVAL); 542 } 543 *v = gp; 544 return (0); 545 } 546 547 static int 548 g_part_parm_provider(struct gctl_req *req, const char *name, 549 struct g_provider **v) 550 { 551 struct g_provider *pp; 552 const char *pname; 553 554 pname = gctl_get_asciiparam(req, name); 555 if (pname == NULL) 556 return (ENOATTR); 557 if (strncmp(pname, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 558 pname += sizeof(_PATH_DEV) - 1; 559 pp = g_provider_by_name(pname); 560 if (pp == NULL) { 561 gctl_error(req, "%d %s '%s'", EINVAL, name, pname); 562 return (EINVAL); 563 } 564 *v = pp; 565 return (0); 566 } 567 568 static int 569 g_part_parm_quad(struct gctl_req *req, const char *name, quad_t *v) 570 { 571 const char *p; 572 char *x; 573 quad_t q; 574 575 p = gctl_get_asciiparam(req, name); 576 if (p == NULL) 577 return (ENOATTR); 578 q = strtoq(p, &x, 0); 579 if (*x != '\0' || q < 0) { 580 gctl_error(req, "%d %s '%s'", EINVAL, name, p); 581 return (EINVAL); 582 } 583 *v = q; 584 return (0); 585 } 586 587 static int 588 g_part_parm_scheme(struct gctl_req *req, const char *name, 589 struct g_part_scheme **v) 590 { 591 struct g_part_scheme *s; 592 const char *p; 593 594 p = gctl_get_asciiparam(req, name); 595 if (p == NULL) 596 return (ENOATTR); 597 TAILQ_FOREACH(s, &g_part_schemes, scheme_list) { 598 if (s == &g_part_null_scheme) 599 continue; 600 if (!strcasecmp(s->name, p)) 601 break; 602 } 603 if (s == NULL) { 604 gctl_error(req, "%d %s '%s'", EINVAL, name, p); 605 return (EINVAL); 606 } 607 *v = s; 608 return (0); 609 } 610 611 static int 612 g_part_parm_str(struct gctl_req *req, const char *name, const char **v) 613 { 614 const char *p; 615 616 p = gctl_get_asciiparam(req, name); 617 if (p == NULL) 618 return (ENOATTR); 619 /* An empty label is always valid. */ 620 if (strcmp(name, "label") != 0 && p[0] == '\0') { 621 gctl_error(req, "%d %s '%s'", EINVAL, name, p); 622 return (EINVAL); 623 } 624 *v = p; 625 return (0); 626 } 627 628 static int 629 g_part_parm_intmax(struct gctl_req *req, const char *name, u_int *v) 630 { 631 const intmax_t *p; 632 int size; 633 634 p = gctl_get_param(req, name, &size); 635 if (p == NULL) 636 return (ENOATTR); 637 if (size != sizeof(*p) || *p < 0 || *p > INT_MAX) { 638 gctl_error(req, "%d %s '%jd'", EINVAL, name, *p); 639 return (EINVAL); 640 } 641 *v = (u_int)*p; 642 return (0); 643 } 644 645 static int 646 g_part_parm_uint32(struct gctl_req *req, const char *name, u_int *v) 647 { 648 const uint32_t *p; 649 int size; 650 651 p = gctl_get_param(req, name, &size); 652 if (p == NULL) 653 return (ENOATTR); 654 if (size != sizeof(*p) || *p > INT_MAX) { 655 gctl_error(req, "%d %s '%u'", EINVAL, name, (unsigned int)*p); 656 return (EINVAL); 657 } 658 *v = (u_int)*p; 659 return (0); 660 } 661 662 static int 663 g_part_parm_bootcode(struct gctl_req *req, const char *name, const void **v, 664 unsigned int *s) 665 { 666 const void *p; 667 int size; 668 669 p = gctl_get_param(req, name, &size); 670 if (p == NULL) 671 return (ENOATTR); 672 *v = p; 673 *s = size; 674 return (0); 675 } 676 677 static int 678 g_part_probe(struct g_geom *gp, struct g_consumer *cp, int depth) 679 { 680 struct g_part_scheme *iter, *scheme; 681 struct g_part_table *table; 682 int pri, probe; 683 684 table = gp->softc; 685 scheme = (table != NULL) ? table->gpt_scheme : NULL; 686 pri = (scheme != NULL) ? G_PART_PROBE(table, cp) : INT_MIN; 687 if (pri == 0) 688 goto done; 689 if (pri > 0) { /* error */ 690 scheme = NULL; 691 pri = INT_MIN; 692 } 693 694 TAILQ_FOREACH(iter, &g_part_schemes, scheme_list) { 695 if (iter == &g_part_null_scheme) 696 continue; 697 table = (void *)kobj_create((kobj_class_t)iter, M_GEOM, 698 M_WAITOK); 699 table->gpt_gp = gp; 700 table->gpt_scheme = iter; 701 table->gpt_depth = depth; 702 probe = G_PART_PROBE(table, cp); 703 if (probe <= 0 && probe > pri) { 704 pri = probe; 705 scheme = iter; 706 if (gp->softc != NULL) 707 kobj_delete((kobj_t)gp->softc, M_GEOM); 708 gp->softc = table; 709 if (pri == 0) 710 goto done; 711 } else 712 kobj_delete((kobj_t)table, M_GEOM); 713 } 714 715 done: 716 return ((scheme == NULL) ? ENXIO : 0); 717 } 718 719 /* 720 * Control request functions. 721 */ 722 723 static int 724 g_part_ctl_add(struct gctl_req *req, struct g_part_parms *gpp) 725 { 726 struct g_geom *gp; 727 struct g_provider *pp; 728 struct g_part_entry *delent, *last, *entry; 729 struct g_part_table *table; 730 struct sbuf *sb; 731 quad_t end; 732 unsigned int index; 733 int error; 734 735 gp = gpp->gpp_geom; 736 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 737 g_topology_assert(); 738 739 pp = LIST_FIRST(&gp->consumer)->provider; 740 table = gp->softc; 741 end = gpp->gpp_start + gpp->gpp_size - 1; 742 743 if (gpp->gpp_start < table->gpt_first || 744 gpp->gpp_start > table->gpt_last) { 745 gctl_error(req, "%d start '%jd'", EINVAL, 746 (intmax_t)gpp->gpp_start); 747 return (EINVAL); 748 } 749 if (end < gpp->gpp_start || end > table->gpt_last) { 750 gctl_error(req, "%d size '%jd'", EINVAL, 751 (intmax_t)gpp->gpp_size); 752 return (EINVAL); 753 } 754 if (gpp->gpp_index > table->gpt_entries) { 755 gctl_error(req, "%d index '%d'", EINVAL, gpp->gpp_index); 756 return (EINVAL); 757 } 758 759 delent = last = NULL; 760 index = (gpp->gpp_index > 0) ? gpp->gpp_index : 1; 761 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 762 if (entry->gpe_deleted) { 763 if (entry->gpe_index == index) 764 delent = entry; 765 continue; 766 } 767 if (entry->gpe_index == index) 768 index = entry->gpe_index + 1; 769 if (entry->gpe_index < index) 770 last = entry; 771 if (entry->gpe_internal) 772 continue; 773 if (gpp->gpp_start >= entry->gpe_start && 774 gpp->gpp_start <= entry->gpe_end) { 775 gctl_error(req, "%d start '%jd'", ENOSPC, 776 (intmax_t)gpp->gpp_start); 777 return (ENOSPC); 778 } 779 if (end >= entry->gpe_start && end <= entry->gpe_end) { 780 gctl_error(req, "%d end '%jd'", ENOSPC, (intmax_t)end); 781 return (ENOSPC); 782 } 783 if (gpp->gpp_start < entry->gpe_start && end > entry->gpe_end) { 784 gctl_error(req, "%d size '%jd'", ENOSPC, 785 (intmax_t)gpp->gpp_size); 786 return (ENOSPC); 787 } 788 } 789 if (gpp->gpp_index > 0 && index != gpp->gpp_index) { 790 gctl_error(req, "%d index '%d'", EEXIST, gpp->gpp_index); 791 return (EEXIST); 792 } 793 if (index > table->gpt_entries) { 794 gctl_error(req, "%d index '%d'", ENOSPC, index); 795 return (ENOSPC); 796 } 797 798 entry = (delent == NULL) ? g_malloc(table->gpt_scheme->gps_entrysz, 799 M_WAITOK | M_ZERO) : delent; 800 entry->gpe_index = index; 801 entry->gpe_start = gpp->gpp_start; 802 entry->gpe_end = end; 803 error = G_PART_ADD(table, entry, gpp); 804 if (error) { 805 gctl_error(req, "%d", error); 806 if (delent == NULL) 807 g_free(entry); 808 return (error); 809 } 810 if (delent == NULL) { 811 if (last == NULL) 812 LIST_INSERT_HEAD(&table->gpt_entry, entry, gpe_entry); 813 else 814 LIST_INSERT_AFTER(last, entry, gpe_entry); 815 entry->gpe_created = 1; 816 } else { 817 entry->gpe_deleted = 0; 818 entry->gpe_modified = 1; 819 } 820 g_part_new_provider(gp, table, entry); 821 822 /* Provide feedback if so requested. */ 823 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 824 sb = sbuf_new_auto(); 825 G_PART_FULLNAME(table, entry, sb, gp->name); 826 if (pp->stripesize > 0 && entry->gpe_pp->stripeoffset != 0) 827 sbuf_printf(sb, " added, but partition is not " 828 "aligned on %ju bytes\n", (uintmax_t)pp->stripesize); 829 else 830 sbuf_cat(sb, " added\n"); 831 sbuf_finish(sb); 832 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 833 sbuf_delete(sb); 834 } 835 return (0); 836 } 837 838 static int 839 g_part_ctl_bootcode(struct gctl_req *req, struct g_part_parms *gpp) 840 { 841 struct g_geom *gp; 842 struct g_part_table *table; 843 struct sbuf *sb; 844 int error, sz; 845 846 gp = gpp->gpp_geom; 847 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 848 g_topology_assert(); 849 850 table = gp->softc; 851 sz = table->gpt_scheme->gps_bootcodesz; 852 if (sz == 0) { 853 error = ENODEV; 854 goto fail; 855 } 856 if (gpp->gpp_codesize > sz) { 857 error = EFBIG; 858 goto fail; 859 } 860 861 error = G_PART_BOOTCODE(table, gpp); 862 if (error) 863 goto fail; 864 865 /* Provide feedback if so requested. */ 866 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 867 sb = sbuf_new_auto(); 868 sbuf_printf(sb, "bootcode written to %s\n", gp->name); 869 sbuf_finish(sb); 870 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 871 sbuf_delete(sb); 872 } 873 return (0); 874 875 fail: 876 gctl_error(req, "%d", error); 877 return (error); 878 } 879 880 static int 881 g_part_ctl_commit(struct gctl_req *req, struct g_part_parms *gpp) 882 { 883 struct g_consumer *cp; 884 struct g_geom *gp; 885 struct g_provider *pp; 886 struct g_part_entry *entry, *tmp; 887 struct g_part_table *table; 888 char *buf; 889 int error, i; 890 891 gp = gpp->gpp_geom; 892 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 893 g_topology_assert(); 894 895 table = gp->softc; 896 if (!table->gpt_opened) { 897 gctl_error(req, "%d", EPERM); 898 return (EPERM); 899 } 900 901 g_topology_unlock(); 902 903 cp = LIST_FIRST(&gp->consumer); 904 if ((table->gpt_smhead | table->gpt_smtail) != 0) { 905 pp = cp->provider; 906 buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO); 907 while (table->gpt_smhead != 0) { 908 i = ffs(table->gpt_smhead) - 1; 909 error = g_write_data(cp, i * pp->sectorsize, buf, 910 pp->sectorsize); 911 if (error) { 912 g_free(buf); 913 goto fail; 914 } 915 table->gpt_smhead &= ~(1 << i); 916 } 917 while (table->gpt_smtail != 0) { 918 i = ffs(table->gpt_smtail) - 1; 919 error = g_write_data(cp, pp->mediasize - (i + 1) * 920 pp->sectorsize, buf, pp->sectorsize); 921 if (error) { 922 g_free(buf); 923 goto fail; 924 } 925 table->gpt_smtail &= ~(1 << i); 926 } 927 g_free(buf); 928 } 929 930 if (table->gpt_scheme == &g_part_null_scheme) { 931 g_topology_lock(); 932 g_access(cp, -1, -1, -1); 933 g_part_wither(gp, ENXIO); 934 return (0); 935 } 936 937 error = G_PART_WRITE(table, cp); 938 if (error) 939 goto fail; 940 941 LIST_FOREACH_SAFE(entry, &table->gpt_entry, gpe_entry, tmp) { 942 if (!entry->gpe_deleted) { 943 /* Notify consumers that provider might be changed. */ 944 if (entry->gpe_modified && ( 945 entry->gpe_pp->acw + entry->gpe_pp->ace + 946 entry->gpe_pp->acr) == 0) 947 g_media_changed(entry->gpe_pp, M_NOWAIT); 948 entry->gpe_created = 0; 949 entry->gpe_modified = 0; 950 continue; 951 } 952 LIST_REMOVE(entry, gpe_entry); 953 g_free(entry); 954 } 955 table->gpt_created = 0; 956 table->gpt_opened = 0; 957 958 g_topology_lock(); 959 g_access(cp, -1, -1, -1); 960 return (0); 961 962 fail: 963 g_topology_lock(); 964 gctl_error(req, "%d", error); 965 return (error); 966 } 967 968 static int 969 g_part_ctl_create(struct gctl_req *req, struct g_part_parms *gpp) 970 { 971 struct g_consumer *cp; 972 struct g_geom *gp; 973 struct g_provider *pp; 974 struct g_part_scheme *scheme; 975 struct g_part_table *null, *table; 976 struct sbuf *sb; 977 int attr, error; 978 979 pp = gpp->gpp_provider; 980 scheme = gpp->gpp_scheme; 981 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, pp->name)); 982 g_topology_assert(); 983 984 /* Check that there isn't already a g_part geom on the provider. */ 985 gp = g_part_find_geom(pp->name); 986 if (gp != NULL) { 987 null = gp->softc; 988 if (null->gpt_scheme != &g_part_null_scheme) { 989 gctl_error(req, "%d geom '%s'", EEXIST, pp->name); 990 return (EEXIST); 991 } 992 } else 993 null = NULL; 994 995 if ((gpp->gpp_parms & G_PART_PARM_ENTRIES) && 996 (gpp->gpp_entries < scheme->gps_minent || 997 gpp->gpp_entries > scheme->gps_maxent)) { 998 gctl_error(req, "%d entries '%d'", EINVAL, gpp->gpp_entries); 999 return (EINVAL); 1000 } 1001 1002 if (null == NULL) 1003 gp = g_new_geomf(&g_part_class, "%s", pp->name); 1004 gp->softc = kobj_create((kobj_class_t)gpp->gpp_scheme, M_GEOM, 1005 M_WAITOK); 1006 table = gp->softc; 1007 table->gpt_gp = gp; 1008 table->gpt_scheme = gpp->gpp_scheme; 1009 table->gpt_entries = (gpp->gpp_parms & G_PART_PARM_ENTRIES) ? 1010 gpp->gpp_entries : scheme->gps_minent; 1011 LIST_INIT(&table->gpt_entry); 1012 if (null == NULL) { 1013 cp = g_new_consumer(gp); 1014 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 1015 error = g_attach(cp, pp); 1016 if (error == 0) 1017 error = g_access(cp, 1, 1, 1); 1018 if (error != 0) { 1019 g_part_wither(gp, error); 1020 gctl_error(req, "%d geom '%s'", error, pp->name); 1021 return (error); 1022 } 1023 table->gpt_opened = 1; 1024 } else { 1025 cp = LIST_FIRST(&gp->consumer); 1026 table->gpt_opened = null->gpt_opened; 1027 table->gpt_smhead = null->gpt_smhead; 1028 table->gpt_smtail = null->gpt_smtail; 1029 } 1030 1031 g_topology_unlock(); 1032 1033 /* Make sure the provider has media. */ 1034 if (pp->mediasize == 0 || pp->sectorsize == 0) { 1035 error = ENODEV; 1036 goto fail; 1037 } 1038 1039 /* Make sure we can nest and if so, determine our depth. */ 1040 error = g_getattr("PART::isleaf", cp, &attr); 1041 if (!error && attr) { 1042 error = ENODEV; 1043 goto fail; 1044 } 1045 error = g_getattr("PART::depth", cp, &attr); 1046 table->gpt_depth = (!error) ? attr + 1 : 0; 1047 1048 /* 1049 * Synthesize a disk geometry. Some partitioning schemes 1050 * depend on it and since some file systems need it even 1051 * when the partitition scheme doesn't, we do it here in 1052 * scheme-independent code. 1053 */ 1054 g_part_geometry(table, cp, pp->mediasize / pp->sectorsize); 1055 1056 error = G_PART_CREATE(table, gpp); 1057 if (error) 1058 goto fail; 1059 1060 g_topology_lock(); 1061 1062 table->gpt_created = 1; 1063 if (null != NULL) 1064 kobj_delete((kobj_t)null, M_GEOM); 1065 1066 /* 1067 * Support automatic commit by filling in the gpp_geom 1068 * parameter. 1069 */ 1070 gpp->gpp_parms |= G_PART_PARM_GEOM; 1071 gpp->gpp_geom = gp; 1072 1073 /* Provide feedback if so requested. */ 1074 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1075 sb = sbuf_new_auto(); 1076 sbuf_printf(sb, "%s created\n", gp->name); 1077 sbuf_finish(sb); 1078 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1079 sbuf_delete(sb); 1080 } 1081 return (0); 1082 1083 fail: 1084 g_topology_lock(); 1085 if (null == NULL) { 1086 g_access(cp, -1, -1, -1); 1087 g_part_wither(gp, error); 1088 } else { 1089 kobj_delete((kobj_t)gp->softc, M_GEOM); 1090 gp->softc = null; 1091 } 1092 gctl_error(req, "%d provider", error); 1093 return (error); 1094 } 1095 1096 static int 1097 g_part_ctl_delete(struct gctl_req *req, struct g_part_parms *gpp) 1098 { 1099 struct g_geom *gp; 1100 struct g_provider *pp; 1101 struct g_part_entry *entry; 1102 struct g_part_table *table; 1103 struct sbuf *sb; 1104 1105 gp = gpp->gpp_geom; 1106 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1107 g_topology_assert(); 1108 1109 table = gp->softc; 1110 1111 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1112 if (entry->gpe_deleted || entry->gpe_internal) 1113 continue; 1114 if (entry->gpe_index == gpp->gpp_index) 1115 break; 1116 } 1117 if (entry == NULL) { 1118 gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index); 1119 return (ENOENT); 1120 } 1121 1122 pp = entry->gpe_pp; 1123 if (pp != NULL) { 1124 if (pp->acr > 0 || pp->acw > 0 || pp->ace > 0) { 1125 gctl_error(req, "%d", EBUSY); 1126 return (EBUSY); 1127 } 1128 1129 pp->private = NULL; 1130 entry->gpe_pp = NULL; 1131 } 1132 1133 if (pp != NULL) 1134 g_wither_provider(pp, ENXIO); 1135 1136 /* Provide feedback if so requested. */ 1137 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1138 sb = sbuf_new_auto(); 1139 G_PART_FULLNAME(table, entry, sb, gp->name); 1140 sbuf_cat(sb, " deleted\n"); 1141 sbuf_finish(sb); 1142 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1143 sbuf_delete(sb); 1144 } 1145 1146 if (entry->gpe_created) { 1147 LIST_REMOVE(entry, gpe_entry); 1148 g_free(entry); 1149 } else { 1150 entry->gpe_modified = 0; 1151 entry->gpe_deleted = 1; 1152 } 1153 return (0); 1154 } 1155 1156 static int 1157 g_part_ctl_destroy(struct gctl_req *req, struct g_part_parms *gpp) 1158 { 1159 struct g_consumer *cp; 1160 struct g_geom *gp; 1161 struct g_provider *pp; 1162 struct g_part_entry *entry, *tmp; 1163 struct g_part_table *null, *table; 1164 struct sbuf *sb; 1165 int error; 1166 1167 gp = gpp->gpp_geom; 1168 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1169 g_topology_assert(); 1170 1171 table = gp->softc; 1172 /* Check for busy providers. */ 1173 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1174 if (entry->gpe_deleted || entry->gpe_internal) 1175 continue; 1176 if (gpp->gpp_force) { 1177 pp = entry->gpe_pp; 1178 if (pp == NULL) 1179 continue; 1180 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 1181 continue; 1182 } 1183 gctl_error(req, "%d", EBUSY); 1184 return (EBUSY); 1185 } 1186 1187 if (gpp->gpp_force) { 1188 /* Destroy all providers. */ 1189 LIST_FOREACH_SAFE(entry, &table->gpt_entry, gpe_entry, tmp) { 1190 pp = entry->gpe_pp; 1191 if (pp != NULL) { 1192 pp->private = NULL; 1193 g_wither_provider(pp, ENXIO); 1194 } 1195 LIST_REMOVE(entry, gpe_entry); 1196 g_free(entry); 1197 } 1198 } 1199 1200 error = G_PART_DESTROY(table, gpp); 1201 if (error) { 1202 gctl_error(req, "%d", error); 1203 return (error); 1204 } 1205 1206 gp->softc = kobj_create((kobj_class_t)&g_part_null_scheme, M_GEOM, 1207 M_WAITOK); 1208 null = gp->softc; 1209 null->gpt_gp = gp; 1210 null->gpt_scheme = &g_part_null_scheme; 1211 LIST_INIT(&null->gpt_entry); 1212 1213 cp = LIST_FIRST(&gp->consumer); 1214 pp = cp->provider; 1215 null->gpt_last = pp->mediasize / pp->sectorsize - 1; 1216 1217 null->gpt_depth = table->gpt_depth; 1218 null->gpt_opened = table->gpt_opened; 1219 null->gpt_smhead = table->gpt_smhead; 1220 null->gpt_smtail = table->gpt_smtail; 1221 1222 while ((entry = LIST_FIRST(&table->gpt_entry)) != NULL) { 1223 LIST_REMOVE(entry, gpe_entry); 1224 g_free(entry); 1225 } 1226 kobj_delete((kobj_t)table, M_GEOM); 1227 1228 /* Provide feedback if so requested. */ 1229 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1230 sb = sbuf_new_auto(); 1231 sbuf_printf(sb, "%s destroyed\n", gp->name); 1232 sbuf_finish(sb); 1233 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1234 sbuf_delete(sb); 1235 } 1236 return (0); 1237 } 1238 1239 static int 1240 g_part_ctl_modify(struct gctl_req *req, struct g_part_parms *gpp) 1241 { 1242 struct g_geom *gp; 1243 struct g_part_entry *entry; 1244 struct g_part_table *table; 1245 struct sbuf *sb; 1246 int error; 1247 1248 gp = gpp->gpp_geom; 1249 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1250 g_topology_assert(); 1251 1252 table = gp->softc; 1253 1254 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1255 if (entry->gpe_deleted || entry->gpe_internal) 1256 continue; 1257 if (entry->gpe_index == gpp->gpp_index) 1258 break; 1259 } 1260 if (entry == NULL) { 1261 gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index); 1262 return (ENOENT); 1263 } 1264 1265 error = G_PART_MODIFY(table, entry, gpp); 1266 if (error) { 1267 gctl_error(req, "%d", error); 1268 return (error); 1269 } 1270 1271 if (!entry->gpe_created) 1272 entry->gpe_modified = 1; 1273 1274 /* Provide feedback if so requested. */ 1275 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1276 sb = sbuf_new_auto(); 1277 G_PART_FULLNAME(table, entry, sb, gp->name); 1278 sbuf_cat(sb, " modified\n"); 1279 sbuf_finish(sb); 1280 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1281 sbuf_delete(sb); 1282 } 1283 return (0); 1284 } 1285 1286 static int 1287 g_part_ctl_move(struct gctl_req *req, struct g_part_parms *gpp) 1288 { 1289 gctl_error(req, "%d verb 'move'", ENOSYS); 1290 return (ENOSYS); 1291 } 1292 1293 static int 1294 g_part_ctl_recover(struct gctl_req *req, struct g_part_parms *gpp) 1295 { 1296 struct g_part_table *table; 1297 struct g_geom *gp; 1298 struct sbuf *sb; 1299 int error, recovered; 1300 1301 gp = gpp->gpp_geom; 1302 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1303 g_topology_assert(); 1304 table = gp->softc; 1305 error = recovered = 0; 1306 1307 if (table->gpt_corrupt) { 1308 error = G_PART_RECOVER(table); 1309 if (error == 0) 1310 error = g_part_check_integrity(table, 1311 LIST_FIRST(&gp->consumer)); 1312 if (error) { 1313 gctl_error(req, "%d recovering '%s' failed", 1314 error, gp->name); 1315 return (error); 1316 } 1317 recovered = 1; 1318 } 1319 /* Provide feedback if so requested. */ 1320 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1321 sb = sbuf_new_auto(); 1322 if (recovered) 1323 sbuf_printf(sb, "%s recovered\n", gp->name); 1324 else 1325 sbuf_printf(sb, "%s recovering is not needed\n", 1326 gp->name); 1327 sbuf_finish(sb); 1328 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1329 sbuf_delete(sb); 1330 } 1331 return (0); 1332 } 1333 1334 static int 1335 g_part_ctl_resize(struct gctl_req *req, struct g_part_parms *gpp) 1336 { 1337 struct g_geom *gp; 1338 struct g_provider *pp; 1339 struct g_part_entry *pe, *entry; 1340 struct g_part_table *table; 1341 struct sbuf *sb; 1342 quad_t end; 1343 int error; 1344 off_t mediasize; 1345 1346 gp = gpp->gpp_geom; 1347 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1348 g_topology_assert(); 1349 table = gp->softc; 1350 1351 /* check gpp_index */ 1352 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1353 if (entry->gpe_deleted || entry->gpe_internal) 1354 continue; 1355 if (entry->gpe_index == gpp->gpp_index) 1356 break; 1357 } 1358 if (entry == NULL) { 1359 gctl_error(req, "%d index '%d'", ENOENT, gpp->gpp_index); 1360 return (ENOENT); 1361 } 1362 1363 /* check gpp_size */ 1364 end = entry->gpe_start + gpp->gpp_size - 1; 1365 if (gpp->gpp_size < 1 || end > table->gpt_last) { 1366 gctl_error(req, "%d size '%jd'", EINVAL, 1367 (intmax_t)gpp->gpp_size); 1368 return (EINVAL); 1369 } 1370 1371 LIST_FOREACH(pe, &table->gpt_entry, gpe_entry) { 1372 if (pe->gpe_deleted || pe->gpe_internal || pe == entry) 1373 continue; 1374 if (end >= pe->gpe_start && end <= pe->gpe_end) { 1375 gctl_error(req, "%d end '%jd'", ENOSPC, 1376 (intmax_t)end); 1377 return (ENOSPC); 1378 } 1379 if (entry->gpe_start < pe->gpe_start && end > pe->gpe_end) { 1380 gctl_error(req, "%d size '%jd'", ENOSPC, 1381 (intmax_t)gpp->gpp_size); 1382 return (ENOSPC); 1383 } 1384 } 1385 1386 pp = entry->gpe_pp; 1387 if ((g_debugflags & G_F_FOOTSHOOTING) == 0 && 1388 (pp->acr > 0 || pp->acw > 0 || pp->ace > 0)) { 1389 if (entry->gpe_end - entry->gpe_start + 1 > gpp->gpp_size) { 1390 /* Deny shrinking of an opened partition. */ 1391 gctl_error(req, "%d", EBUSY); 1392 return (EBUSY); 1393 } 1394 } 1395 1396 error = G_PART_RESIZE(table, entry, gpp); 1397 if (error) { 1398 gctl_error(req, "%d%s", error, error != EBUSY ? "": 1399 " resizing will lead to unexpected shrinking" 1400 " due to alignment"); 1401 return (error); 1402 } 1403 1404 if (!entry->gpe_created) 1405 entry->gpe_modified = 1; 1406 1407 /* update mediasize of changed provider */ 1408 mediasize = (entry->gpe_end - entry->gpe_start + 1) * 1409 pp->sectorsize; 1410 g_resize_provider(pp, mediasize); 1411 1412 /* Provide feedback if so requested. */ 1413 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1414 sb = sbuf_new_auto(); 1415 G_PART_FULLNAME(table, entry, sb, gp->name); 1416 sbuf_cat(sb, " resized\n"); 1417 sbuf_finish(sb); 1418 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1419 sbuf_delete(sb); 1420 } 1421 return (0); 1422 } 1423 1424 static int 1425 g_part_ctl_setunset(struct gctl_req *req, struct g_part_parms *gpp, 1426 unsigned int set) 1427 { 1428 struct g_geom *gp; 1429 struct g_part_entry *entry; 1430 struct g_part_table *table; 1431 struct sbuf *sb; 1432 int error; 1433 1434 gp = gpp->gpp_geom; 1435 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1436 g_topology_assert(); 1437 1438 table = gp->softc; 1439 1440 if (gpp->gpp_parms & G_PART_PARM_INDEX) { 1441 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1442 if (entry->gpe_deleted || entry->gpe_internal) 1443 continue; 1444 if (entry->gpe_index == gpp->gpp_index) 1445 break; 1446 } 1447 if (entry == NULL) { 1448 gctl_error(req, "%d index '%d'", ENOENT, 1449 gpp->gpp_index); 1450 return (ENOENT); 1451 } 1452 } else 1453 entry = NULL; 1454 1455 error = G_PART_SETUNSET(table, entry, gpp->gpp_attrib, set); 1456 if (error) { 1457 gctl_error(req, "%d attrib '%s'", error, gpp->gpp_attrib); 1458 return (error); 1459 } 1460 1461 /* Provide feedback if so requested. */ 1462 if (gpp->gpp_parms & G_PART_PARM_OUTPUT) { 1463 sb = sbuf_new_auto(); 1464 sbuf_printf(sb, "%s %sset on ", gpp->gpp_attrib, 1465 (set) ? "" : "un"); 1466 if (entry) 1467 G_PART_FULLNAME(table, entry, sb, gp->name); 1468 else 1469 sbuf_cat(sb, gp->name); 1470 sbuf_cat(sb, "\n"); 1471 sbuf_finish(sb); 1472 gctl_set_param(req, "output", sbuf_data(sb), sbuf_len(sb) + 1); 1473 sbuf_delete(sb); 1474 } 1475 return (0); 1476 } 1477 1478 static int 1479 g_part_ctl_undo(struct gctl_req *req, struct g_part_parms *gpp) 1480 { 1481 struct g_consumer *cp; 1482 struct g_provider *pp; 1483 struct g_geom *gp; 1484 struct g_part_entry *entry, *tmp; 1485 struct g_part_table *table; 1486 int error, reprobe; 1487 1488 gp = gpp->gpp_geom; 1489 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, gp->name)); 1490 g_topology_assert(); 1491 1492 table = gp->softc; 1493 if (!table->gpt_opened) { 1494 gctl_error(req, "%d", EPERM); 1495 return (EPERM); 1496 } 1497 1498 cp = LIST_FIRST(&gp->consumer); 1499 LIST_FOREACH_SAFE(entry, &table->gpt_entry, gpe_entry, tmp) { 1500 entry->gpe_modified = 0; 1501 if (entry->gpe_created) { 1502 pp = entry->gpe_pp; 1503 if (pp != NULL) { 1504 pp->private = NULL; 1505 entry->gpe_pp = NULL; 1506 g_wither_provider(pp, ENXIO); 1507 } 1508 entry->gpe_deleted = 1; 1509 } 1510 if (entry->gpe_deleted) { 1511 LIST_REMOVE(entry, gpe_entry); 1512 g_free(entry); 1513 } 1514 } 1515 1516 g_topology_unlock(); 1517 1518 reprobe = (table->gpt_scheme == &g_part_null_scheme || 1519 table->gpt_created) ? 1 : 0; 1520 1521 if (reprobe) { 1522 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1523 if (entry->gpe_internal) 1524 continue; 1525 error = EBUSY; 1526 goto fail; 1527 } 1528 while ((entry = LIST_FIRST(&table->gpt_entry)) != NULL) { 1529 LIST_REMOVE(entry, gpe_entry); 1530 g_free(entry); 1531 } 1532 error = g_part_probe(gp, cp, table->gpt_depth); 1533 if (error) { 1534 g_topology_lock(); 1535 g_access(cp, -1, -1, -1); 1536 g_part_wither(gp, error); 1537 return (0); 1538 } 1539 table = gp->softc; 1540 1541 /* 1542 * Synthesize a disk geometry. Some partitioning schemes 1543 * depend on it and since some file systems need it even 1544 * when the partitition scheme doesn't, we do it here in 1545 * scheme-independent code. 1546 */ 1547 pp = cp->provider; 1548 g_part_geometry(table, cp, pp->mediasize / pp->sectorsize); 1549 } 1550 1551 error = G_PART_READ(table, cp); 1552 if (error) 1553 goto fail; 1554 error = g_part_check_integrity(table, cp); 1555 if (error) 1556 goto fail; 1557 1558 g_topology_lock(); 1559 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 1560 if (!entry->gpe_internal) 1561 g_part_new_provider(gp, table, entry); 1562 } 1563 1564 table->gpt_opened = 0; 1565 g_access(cp, -1, -1, -1); 1566 return (0); 1567 1568 fail: 1569 g_topology_lock(); 1570 gctl_error(req, "%d", error); 1571 return (error); 1572 } 1573 1574 static void 1575 g_part_wither(struct g_geom *gp, int error) 1576 { 1577 struct g_part_entry *entry; 1578 struct g_part_table *table; 1579 struct g_provider *pp; 1580 1581 table = gp->softc; 1582 if (table != NULL) { 1583 gp->softc = NULL; 1584 while ((entry = LIST_FIRST(&table->gpt_entry)) != NULL) { 1585 LIST_REMOVE(entry, gpe_entry); 1586 pp = entry->gpe_pp; 1587 entry->gpe_pp = NULL; 1588 if (pp != NULL) { 1589 pp->private = NULL; 1590 g_wither_provider(pp, error); 1591 } 1592 g_free(entry); 1593 } 1594 G_PART_DESTROY(table, NULL); 1595 kobj_delete((kobj_t)table, M_GEOM); 1596 } 1597 g_wither_geom(gp, error); 1598 } 1599 1600 /* 1601 * Class methods. 1602 */ 1603 1604 static void 1605 g_part_ctlreq(struct gctl_req *req, struct g_class *mp, const char *verb) 1606 { 1607 struct g_part_parms gpp; 1608 struct g_part_table *table; 1609 struct gctl_req_arg *ap; 1610 enum g_part_ctl ctlreq; 1611 unsigned int i, mparms, oparms, parm; 1612 int auto_commit, close_on_error; 1613 int error, modifies; 1614 1615 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s,%s)", __func__, mp->name, verb)); 1616 g_topology_assert(); 1617 1618 ctlreq = G_PART_CTL_NONE; 1619 modifies = 1; 1620 mparms = 0; 1621 oparms = G_PART_PARM_FLAGS | G_PART_PARM_OUTPUT | G_PART_PARM_VERSION; 1622 switch (*verb) { 1623 case 'a': 1624 if (!strcmp(verb, "add")) { 1625 ctlreq = G_PART_CTL_ADD; 1626 mparms |= G_PART_PARM_GEOM | G_PART_PARM_SIZE | 1627 G_PART_PARM_START | G_PART_PARM_TYPE; 1628 oparms |= G_PART_PARM_INDEX | G_PART_PARM_LABEL; 1629 } 1630 break; 1631 case 'b': 1632 if (!strcmp(verb, "bootcode")) { 1633 ctlreq = G_PART_CTL_BOOTCODE; 1634 mparms |= G_PART_PARM_GEOM | G_PART_PARM_BOOTCODE; 1635 oparms |= G_PART_PARM_SKIP_DSN; 1636 } 1637 break; 1638 case 'c': 1639 if (!strcmp(verb, "commit")) { 1640 ctlreq = G_PART_CTL_COMMIT; 1641 mparms |= G_PART_PARM_GEOM; 1642 modifies = 0; 1643 } else if (!strcmp(verb, "create")) { 1644 ctlreq = G_PART_CTL_CREATE; 1645 mparms |= G_PART_PARM_PROVIDER | G_PART_PARM_SCHEME; 1646 oparms |= G_PART_PARM_ENTRIES; 1647 } 1648 break; 1649 case 'd': 1650 if (!strcmp(verb, "delete")) { 1651 ctlreq = G_PART_CTL_DELETE; 1652 mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX; 1653 } else if (!strcmp(verb, "destroy")) { 1654 ctlreq = G_PART_CTL_DESTROY; 1655 mparms |= G_PART_PARM_GEOM; 1656 oparms |= G_PART_PARM_FORCE; 1657 } 1658 break; 1659 case 'm': 1660 if (!strcmp(verb, "modify")) { 1661 ctlreq = G_PART_CTL_MODIFY; 1662 mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX; 1663 oparms |= G_PART_PARM_LABEL | G_PART_PARM_TYPE; 1664 } else if (!strcmp(verb, "move")) { 1665 ctlreq = G_PART_CTL_MOVE; 1666 mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX; 1667 } 1668 break; 1669 case 'r': 1670 if (!strcmp(verb, "recover")) { 1671 ctlreq = G_PART_CTL_RECOVER; 1672 mparms |= G_PART_PARM_GEOM; 1673 } else if (!strcmp(verb, "resize")) { 1674 ctlreq = G_PART_CTL_RESIZE; 1675 mparms |= G_PART_PARM_GEOM | G_PART_PARM_INDEX | 1676 G_PART_PARM_SIZE; 1677 } 1678 break; 1679 case 's': 1680 if (!strcmp(verb, "set")) { 1681 ctlreq = G_PART_CTL_SET; 1682 mparms |= G_PART_PARM_ATTRIB | G_PART_PARM_GEOM; 1683 oparms |= G_PART_PARM_INDEX; 1684 } 1685 break; 1686 case 'u': 1687 if (!strcmp(verb, "undo")) { 1688 ctlreq = G_PART_CTL_UNDO; 1689 mparms |= G_PART_PARM_GEOM; 1690 modifies = 0; 1691 } else if (!strcmp(verb, "unset")) { 1692 ctlreq = G_PART_CTL_UNSET; 1693 mparms |= G_PART_PARM_ATTRIB | G_PART_PARM_GEOM; 1694 oparms |= G_PART_PARM_INDEX; 1695 } 1696 break; 1697 } 1698 if (ctlreq == G_PART_CTL_NONE) { 1699 gctl_error(req, "%d verb '%s'", EINVAL, verb); 1700 return; 1701 } 1702 1703 bzero(&gpp, sizeof(gpp)); 1704 for (i = 0; i < req->narg; i++) { 1705 ap = &req->arg[i]; 1706 parm = 0; 1707 switch (ap->name[0]) { 1708 case 'a': 1709 if (!strcmp(ap->name, "arg0")) { 1710 parm = mparms & 1711 (G_PART_PARM_GEOM | G_PART_PARM_PROVIDER); 1712 } 1713 if (!strcmp(ap->name, "attrib")) 1714 parm = G_PART_PARM_ATTRIB; 1715 break; 1716 case 'b': 1717 if (!strcmp(ap->name, "bootcode")) 1718 parm = G_PART_PARM_BOOTCODE; 1719 break; 1720 case 'c': 1721 if (!strcmp(ap->name, "class")) 1722 continue; 1723 break; 1724 case 'e': 1725 if (!strcmp(ap->name, "entries")) 1726 parm = G_PART_PARM_ENTRIES; 1727 break; 1728 case 'f': 1729 if (!strcmp(ap->name, "flags")) 1730 parm = G_PART_PARM_FLAGS; 1731 else if (!strcmp(ap->name, "force")) 1732 parm = G_PART_PARM_FORCE; 1733 break; 1734 case 'i': 1735 if (!strcmp(ap->name, "index")) 1736 parm = G_PART_PARM_INDEX; 1737 break; 1738 case 'l': 1739 if (!strcmp(ap->name, "label")) 1740 parm = G_PART_PARM_LABEL; 1741 break; 1742 case 'o': 1743 if (!strcmp(ap->name, "output")) 1744 parm = G_PART_PARM_OUTPUT; 1745 break; 1746 case 's': 1747 if (!strcmp(ap->name, "scheme")) 1748 parm = G_PART_PARM_SCHEME; 1749 else if (!strcmp(ap->name, "size")) 1750 parm = G_PART_PARM_SIZE; 1751 else if (!strcmp(ap->name, "start")) 1752 parm = G_PART_PARM_START; 1753 else if (!strcmp(ap->name, "skip_dsn")) 1754 parm = G_PART_PARM_SKIP_DSN; 1755 break; 1756 case 't': 1757 if (!strcmp(ap->name, "type")) 1758 parm = G_PART_PARM_TYPE; 1759 break; 1760 case 'v': 1761 if (!strcmp(ap->name, "verb")) 1762 continue; 1763 else if (!strcmp(ap->name, "version")) 1764 parm = G_PART_PARM_VERSION; 1765 break; 1766 } 1767 if ((parm & (mparms | oparms)) == 0) { 1768 gctl_error(req, "%d param '%s'", EINVAL, ap->name); 1769 return; 1770 } 1771 switch (parm) { 1772 case G_PART_PARM_ATTRIB: 1773 error = g_part_parm_str(req, ap->name, 1774 &gpp.gpp_attrib); 1775 break; 1776 case G_PART_PARM_BOOTCODE: 1777 error = g_part_parm_bootcode(req, ap->name, 1778 &gpp.gpp_codeptr, &gpp.gpp_codesize); 1779 break; 1780 case G_PART_PARM_ENTRIES: 1781 error = g_part_parm_intmax(req, ap->name, 1782 &gpp.gpp_entries); 1783 break; 1784 case G_PART_PARM_FLAGS: 1785 error = g_part_parm_str(req, ap->name, &gpp.gpp_flags); 1786 break; 1787 case G_PART_PARM_FORCE: 1788 error = g_part_parm_uint32(req, ap->name, 1789 &gpp.gpp_force); 1790 break; 1791 case G_PART_PARM_GEOM: 1792 error = g_part_parm_geom(req, ap->name, &gpp.gpp_geom); 1793 break; 1794 case G_PART_PARM_INDEX: 1795 error = g_part_parm_intmax(req, ap->name, 1796 &gpp.gpp_index); 1797 break; 1798 case G_PART_PARM_LABEL: 1799 error = g_part_parm_str(req, ap->name, &gpp.gpp_label); 1800 break; 1801 case G_PART_PARM_OUTPUT: 1802 error = 0; /* Write-only parameter */ 1803 break; 1804 case G_PART_PARM_PROVIDER: 1805 error = g_part_parm_provider(req, ap->name, 1806 &gpp.gpp_provider); 1807 break; 1808 case G_PART_PARM_SCHEME: 1809 error = g_part_parm_scheme(req, ap->name, 1810 &gpp.gpp_scheme); 1811 break; 1812 case G_PART_PARM_SIZE: 1813 error = g_part_parm_quad(req, ap->name, &gpp.gpp_size); 1814 break; 1815 case G_PART_PARM_SKIP_DSN: 1816 error = g_part_parm_uint32(req, ap->name, 1817 &gpp.gpp_skip_dsn); 1818 break; 1819 case G_PART_PARM_START: 1820 error = g_part_parm_quad(req, ap->name, 1821 &gpp.gpp_start); 1822 break; 1823 case G_PART_PARM_TYPE: 1824 error = g_part_parm_str(req, ap->name, &gpp.gpp_type); 1825 break; 1826 case G_PART_PARM_VERSION: 1827 error = g_part_parm_uint32(req, ap->name, 1828 &gpp.gpp_version); 1829 break; 1830 default: 1831 error = EDOOFUS; 1832 gctl_error(req, "%d %s", error, ap->name); 1833 break; 1834 } 1835 if (error != 0) { 1836 if (error == ENOATTR) { 1837 gctl_error(req, "%d param '%s'", error, 1838 ap->name); 1839 } 1840 return; 1841 } 1842 gpp.gpp_parms |= parm; 1843 } 1844 if ((gpp.gpp_parms & mparms) != mparms) { 1845 parm = mparms - (gpp.gpp_parms & mparms); 1846 gctl_error(req, "%d param '%x'", ENOATTR, parm); 1847 return; 1848 } 1849 1850 /* Obtain permissions if possible/necessary. */ 1851 close_on_error = 0; 1852 table = NULL; 1853 if (modifies && (gpp.gpp_parms & G_PART_PARM_GEOM)) { 1854 table = gpp.gpp_geom->softc; 1855 if (table != NULL && table->gpt_corrupt && 1856 ctlreq != G_PART_CTL_DESTROY && 1857 ctlreq != G_PART_CTL_RECOVER && 1858 geom_part_check_integrity) { 1859 gctl_error(req, "%d table '%s' is corrupt", 1860 EPERM, gpp.gpp_geom->name); 1861 return; 1862 } 1863 if (table != NULL && !table->gpt_opened) { 1864 error = g_access(LIST_FIRST(&gpp.gpp_geom->consumer), 1865 1, 1, 1); 1866 if (error) { 1867 gctl_error(req, "%d geom '%s'", error, 1868 gpp.gpp_geom->name); 1869 return; 1870 } 1871 table->gpt_opened = 1; 1872 close_on_error = 1; 1873 } 1874 } 1875 1876 /* Allow the scheme to check or modify the parameters. */ 1877 if (table != NULL) { 1878 error = G_PART_PRECHECK(table, ctlreq, &gpp); 1879 if (error) { 1880 gctl_error(req, "%d pre-check failed", error); 1881 goto out; 1882 } 1883 } else 1884 error = EDOOFUS; /* Prevent bogus uninit. warning. */ 1885 1886 switch (ctlreq) { 1887 case G_PART_CTL_NONE: 1888 panic("%s", __func__); 1889 case G_PART_CTL_ADD: 1890 error = g_part_ctl_add(req, &gpp); 1891 break; 1892 case G_PART_CTL_BOOTCODE: 1893 error = g_part_ctl_bootcode(req, &gpp); 1894 break; 1895 case G_PART_CTL_COMMIT: 1896 error = g_part_ctl_commit(req, &gpp); 1897 break; 1898 case G_PART_CTL_CREATE: 1899 error = g_part_ctl_create(req, &gpp); 1900 break; 1901 case G_PART_CTL_DELETE: 1902 error = g_part_ctl_delete(req, &gpp); 1903 break; 1904 case G_PART_CTL_DESTROY: 1905 error = g_part_ctl_destroy(req, &gpp); 1906 break; 1907 case G_PART_CTL_MODIFY: 1908 error = g_part_ctl_modify(req, &gpp); 1909 break; 1910 case G_PART_CTL_MOVE: 1911 error = g_part_ctl_move(req, &gpp); 1912 break; 1913 case G_PART_CTL_RECOVER: 1914 error = g_part_ctl_recover(req, &gpp); 1915 break; 1916 case G_PART_CTL_RESIZE: 1917 error = g_part_ctl_resize(req, &gpp); 1918 break; 1919 case G_PART_CTL_SET: 1920 error = g_part_ctl_setunset(req, &gpp, 1); 1921 break; 1922 case G_PART_CTL_UNDO: 1923 error = g_part_ctl_undo(req, &gpp); 1924 break; 1925 case G_PART_CTL_UNSET: 1926 error = g_part_ctl_setunset(req, &gpp, 0); 1927 break; 1928 } 1929 1930 /* Implement automatic commit. */ 1931 if (!error) { 1932 auto_commit = (modifies && 1933 (gpp.gpp_parms & G_PART_PARM_FLAGS) && 1934 strchr(gpp.gpp_flags, 'C') != NULL) ? 1 : 0; 1935 if (auto_commit) { 1936 KASSERT(gpp.gpp_parms & G_PART_PARM_GEOM, ("%s", 1937 __func__)); 1938 error = g_part_ctl_commit(req, &gpp); 1939 } 1940 } 1941 1942 out: 1943 if (error && close_on_error) { 1944 g_access(LIST_FIRST(&gpp.gpp_geom->consumer), -1, -1, -1); 1945 table->gpt_opened = 0; 1946 } 1947 } 1948 1949 static int 1950 g_part_destroy_geom(struct gctl_req *req, struct g_class *mp, 1951 struct g_geom *gp) 1952 { 1953 1954 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s,%s)", __func__, mp->name, gp->name)); 1955 g_topology_assert(); 1956 1957 g_part_wither(gp, EINVAL); 1958 return (0); 1959 } 1960 1961 static struct g_geom * 1962 g_part_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 1963 { 1964 struct g_consumer *cp; 1965 struct g_geom *gp; 1966 struct g_part_entry *entry; 1967 struct g_part_table *table; 1968 struct root_hold_token *rht; 1969 int attr, depth; 1970 int error; 1971 1972 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s,%s)", __func__, mp->name, pp->name)); 1973 g_topology_assert(); 1974 1975 /* Skip providers that are already open for writing. */ 1976 if (pp->acw > 0) 1977 return (NULL); 1978 1979 /* 1980 * Create a GEOM with consumer and hook it up to the provider. 1981 * With that we become part of the topology. Obtain read access 1982 * to the provider. 1983 */ 1984 gp = g_new_geomf(mp, "%s", pp->name); 1985 cp = g_new_consumer(gp); 1986 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 1987 error = g_attach(cp, pp); 1988 if (error == 0) 1989 error = g_access(cp, 1, 0, 0); 1990 if (error != 0) { 1991 if (cp->provider) 1992 g_detach(cp); 1993 g_destroy_consumer(cp); 1994 g_destroy_geom(gp); 1995 return (NULL); 1996 } 1997 1998 rht = root_mount_hold(mp->name); 1999 g_topology_unlock(); 2000 2001 /* 2002 * Short-circuit the whole probing galore when there's no 2003 * media present. 2004 */ 2005 if (pp->mediasize == 0 || pp->sectorsize == 0) { 2006 error = ENODEV; 2007 goto fail; 2008 } 2009 2010 /* Make sure we can nest and if so, determine our depth. */ 2011 error = g_getattr("PART::isleaf", cp, &attr); 2012 if (!error && attr) { 2013 error = ENODEV; 2014 goto fail; 2015 } 2016 error = g_getattr("PART::depth", cp, &attr); 2017 depth = (!error) ? attr + 1 : 0; 2018 2019 error = g_part_probe(gp, cp, depth); 2020 if (error) 2021 goto fail; 2022 2023 table = gp->softc; 2024 2025 /* 2026 * Synthesize a disk geometry. Some partitioning schemes 2027 * depend on it and since some file systems need it even 2028 * when the partitition scheme doesn't, we do it here in 2029 * scheme-independent code. 2030 */ 2031 g_part_geometry(table, cp, pp->mediasize / pp->sectorsize); 2032 2033 error = G_PART_READ(table, cp); 2034 if (error) 2035 goto fail; 2036 error = g_part_check_integrity(table, cp); 2037 if (error) 2038 goto fail; 2039 2040 g_topology_lock(); 2041 LIST_FOREACH(entry, &table->gpt_entry, gpe_entry) { 2042 if (!entry->gpe_internal) 2043 g_part_new_provider(gp, table, entry); 2044 } 2045 2046 root_mount_rel(rht); 2047 g_access(cp, -1, 0, 0); 2048 return (gp); 2049 2050 fail: 2051 g_topology_lock(); 2052 root_mount_rel(rht); 2053 g_access(cp, -1, 0, 0); 2054 g_detach(cp); 2055 g_destroy_consumer(cp); 2056 g_destroy_geom(gp); 2057 return (NULL); 2058 } 2059 2060 /* 2061 * Geom methods. 2062 */ 2063 2064 static int 2065 g_part_access(struct g_provider *pp, int dr, int dw, int de) 2066 { 2067 struct g_consumer *cp; 2068 2069 G_PART_TRACE((G_T_ACCESS, "%s(%s,%d,%d,%d)", __func__, pp->name, dr, 2070 dw, de)); 2071 2072 cp = LIST_FIRST(&pp->geom->consumer); 2073 2074 /* We always gain write-exclusive access. */ 2075 return (g_access(cp, dr, dw, dw + de)); 2076 } 2077 2078 static void 2079 g_part_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 2080 struct g_consumer *cp, struct g_provider *pp) 2081 { 2082 char buf[64]; 2083 struct g_part_entry *entry; 2084 struct g_part_table *table; 2085 2086 KASSERT(sb != NULL && gp != NULL, ("%s", __func__)); 2087 table = gp->softc; 2088 2089 if (indent == NULL) { 2090 KASSERT(cp == NULL && pp != NULL, ("%s", __func__)); 2091 entry = pp->private; 2092 if (entry == NULL) 2093 return; 2094 sbuf_printf(sb, " i %u o %ju ty %s", entry->gpe_index, 2095 (uintmax_t)entry->gpe_offset, 2096 G_PART_TYPE(table, entry, buf, sizeof(buf))); 2097 /* 2098 * libdisk compatibility quirk - the scheme dumps the 2099 * slicer name and partition type in a way that is 2100 * compatible with libdisk. When libdisk is not used 2101 * anymore, this should go away. 2102 */ 2103 G_PART_DUMPCONF(table, entry, sb, indent); 2104 } else if (cp != NULL) { /* Consumer configuration. */ 2105 KASSERT(pp == NULL, ("%s", __func__)); 2106 /* none */ 2107 } else if (pp != NULL) { /* Provider configuration. */ 2108 entry = pp->private; 2109 if (entry == NULL) 2110 return; 2111 sbuf_printf(sb, "%s<start>%ju</start>\n", indent, 2112 (uintmax_t)entry->gpe_start); 2113 sbuf_printf(sb, "%s<end>%ju</end>\n", indent, 2114 (uintmax_t)entry->gpe_end); 2115 sbuf_printf(sb, "%s<index>%u</index>\n", indent, 2116 entry->gpe_index); 2117 sbuf_printf(sb, "%s<type>%s</type>\n", indent, 2118 G_PART_TYPE(table, entry, buf, sizeof(buf))); 2119 sbuf_printf(sb, "%s<offset>%ju</offset>\n", indent, 2120 (uintmax_t)entry->gpe_offset); 2121 sbuf_printf(sb, "%s<length>%ju</length>\n", indent, 2122 (uintmax_t)pp->mediasize); 2123 G_PART_DUMPCONF(table, entry, sb, indent); 2124 } else { /* Geom configuration. */ 2125 sbuf_printf(sb, "%s<scheme>%s</scheme>\n", indent, 2126 table->gpt_scheme->name); 2127 sbuf_printf(sb, "%s<entries>%u</entries>\n", indent, 2128 table->gpt_entries); 2129 sbuf_printf(sb, "%s<first>%ju</first>\n", indent, 2130 (uintmax_t)table->gpt_first); 2131 sbuf_printf(sb, "%s<last>%ju</last>\n", indent, 2132 (uintmax_t)table->gpt_last); 2133 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n", indent, 2134 table->gpt_sectors); 2135 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n", indent, 2136 table->gpt_heads); 2137 sbuf_printf(sb, "%s<state>%s</state>\n", indent, 2138 table->gpt_corrupt ? "CORRUPT": "OK"); 2139 sbuf_printf(sb, "%s<modified>%s</modified>\n", indent, 2140 table->gpt_opened ? "true": "false"); 2141 G_PART_DUMPCONF(table, NULL, sb, indent); 2142 } 2143 } 2144 2145 /*- 2146 * This start routine is only called for non-trivial requests, all the 2147 * trivial ones are handled autonomously by the slice code. 2148 * For requests we handle here, we must call the g_io_deliver() on the 2149 * bio, and return non-zero to indicate to the slice code that we did so. 2150 * This code executes in the "DOWN" I/O path, this means: 2151 * * No sleeping. 2152 * * Don't grab the topology lock. 2153 * * Don't call biowait, g_getattr(), g_setattr() or g_read_data() 2154 */ 2155 static int 2156 g_part_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td) 2157 { 2158 struct g_part_table *table; 2159 2160 table = pp->geom->softc; 2161 return G_PART_IOCTL(table, pp, cmd, data, fflag, td); 2162 } 2163 2164 static void 2165 g_part_resize(struct g_consumer *cp) 2166 { 2167 struct g_part_table *table; 2168 2169 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, cp->provider->name)); 2170 g_topology_assert(); 2171 2172 if (auto_resize == 0) 2173 return; 2174 2175 table = cp->geom->softc; 2176 if (table->gpt_opened == 0) { 2177 if (g_access(cp, 1, 1, 1) != 0) 2178 return; 2179 table->gpt_opened = 1; 2180 } 2181 if (G_PART_RESIZE(table, NULL, NULL) == 0) 2182 printf("GEOM_PART: %s was automatically resized.\n" 2183 " Use `gpart commit %s` to save changes or " 2184 "`gpart undo %s` to revert them.\n", cp->geom->name, 2185 cp->geom->name, cp->geom->name); 2186 if (g_part_check_integrity(table, cp) != 0) { 2187 g_access(cp, -1, -1, -1); 2188 table->gpt_opened = 0; 2189 g_part_wither(table->gpt_gp, ENXIO); 2190 } 2191 } 2192 2193 static void 2194 g_part_orphan(struct g_consumer *cp) 2195 { 2196 struct g_provider *pp; 2197 struct g_part_table *table; 2198 2199 pp = cp->provider; 2200 KASSERT(pp != NULL, ("%s", __func__)); 2201 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, pp->name)); 2202 g_topology_assert(); 2203 2204 KASSERT(pp->error != 0, ("%s", __func__)); 2205 table = cp->geom->softc; 2206 if (table != NULL && table->gpt_opened) 2207 g_access(cp, -1, -1, -1); 2208 g_part_wither(cp->geom, pp->error); 2209 } 2210 2211 static void 2212 g_part_spoiled(struct g_consumer *cp) 2213 { 2214 2215 G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, cp->provider->name)); 2216 g_topology_assert(); 2217 2218 cp->flags |= G_CF_ORPHAN; 2219 g_part_wither(cp->geom, ENXIO); 2220 } 2221 2222 static void 2223 g_part_start(struct bio *bp) 2224 { 2225 struct bio *bp2; 2226 struct g_consumer *cp; 2227 struct g_geom *gp; 2228 struct g_part_entry *entry; 2229 struct g_part_table *table; 2230 struct g_kerneldump *gkd; 2231 struct g_provider *pp; 2232 void (*done_func)(struct bio *) = g_std_done; 2233 char buf[64]; 2234 2235 biotrack(bp, __func__); 2236 2237 pp = bp->bio_to; 2238 gp = pp->geom; 2239 table = gp->softc; 2240 cp = LIST_FIRST(&gp->consumer); 2241 2242 G_PART_TRACE((G_T_BIO, "%s: cmd=%d, provider=%s", __func__, bp->bio_cmd, 2243 pp->name)); 2244 2245 entry = pp->private; 2246 if (entry == NULL) { 2247 g_io_deliver(bp, ENXIO); 2248 return; 2249 } 2250 2251 switch(bp->bio_cmd) { 2252 case BIO_DELETE: 2253 case BIO_READ: 2254 case BIO_WRITE: 2255 if (bp->bio_offset >= pp->mediasize) { 2256 g_io_deliver(bp, EIO); 2257 return; 2258 } 2259 bp2 = g_clone_bio(bp); 2260 if (bp2 == NULL) { 2261 g_io_deliver(bp, ENOMEM); 2262 return; 2263 } 2264 if (bp2->bio_offset + bp2->bio_length > pp->mediasize) 2265 bp2->bio_length = pp->mediasize - bp2->bio_offset; 2266 bp2->bio_done = g_std_done; 2267 bp2->bio_offset += entry->gpe_offset; 2268 g_io_request(bp2, cp); 2269 return; 2270 case BIO_SPEEDUP: 2271 case BIO_FLUSH: 2272 break; 2273 case BIO_GETATTR: 2274 if (g_handleattr_int(bp, "GEOM::fwheads", table->gpt_heads)) 2275 return; 2276 if (g_handleattr_int(bp, "GEOM::fwsectors", table->gpt_sectors)) 2277 return; 2278 /* 2279 * allow_nesting overrides "isleaf" to false _unless_ the 2280 * provider offset is zero, since otherwise we would recurse. 2281 */ 2282 if (g_handleattr_int(bp, "PART::isleaf", 2283 table->gpt_isleaf && 2284 (allow_nesting == 0 || entry->gpe_offset == 0))) 2285 return; 2286 if (g_handleattr_int(bp, "PART::depth", table->gpt_depth)) 2287 return; 2288 if (g_handleattr_str(bp, "PART::scheme", 2289 table->gpt_scheme->name)) 2290 return; 2291 if (g_handleattr_str(bp, "PART::type", 2292 G_PART_TYPE(table, entry, buf, sizeof(buf)))) 2293 return; 2294 if (!strcmp("GEOM::physpath", bp->bio_attribute)) { 2295 done_func = g_part_get_physpath_done; 2296 break; 2297 } 2298 if (!strcmp("GEOM::kerneldump", bp->bio_attribute)) { 2299 /* 2300 * Check that the partition is suitable for kernel 2301 * dumps. Typically only swap partitions should be 2302 * used. If the request comes from the nested scheme 2303 * we allow dumping there as well. 2304 */ 2305 if ((bp->bio_from == NULL || 2306 bp->bio_from->geom->class != &g_part_class) && 2307 G_PART_DUMPTO(table, entry) == 0) { 2308 g_io_deliver(bp, ENODEV); 2309 printf("GEOM_PART: Partition '%s' not suitable" 2310 " for kernel dumps (wrong type?)\n", 2311 pp->name); 2312 return; 2313 } 2314 gkd = (struct g_kerneldump *)bp->bio_data; 2315 if (gkd->offset >= pp->mediasize) { 2316 g_io_deliver(bp, EIO); 2317 return; 2318 } 2319 if (gkd->offset + gkd->length > pp->mediasize) 2320 gkd->length = pp->mediasize - gkd->offset; 2321 gkd->offset += entry->gpe_offset; 2322 } 2323 break; 2324 default: 2325 g_io_deliver(bp, EOPNOTSUPP); 2326 return; 2327 } 2328 2329 bp2 = g_clone_bio(bp); 2330 if (bp2 == NULL) { 2331 g_io_deliver(bp, ENOMEM); 2332 return; 2333 } 2334 bp2->bio_done = done_func; 2335 g_io_request(bp2, cp); 2336 } 2337 2338 static void 2339 g_part_init(struct g_class *mp) 2340 { 2341 2342 TAILQ_INSERT_HEAD(&g_part_schemes, &g_part_null_scheme, scheme_list); 2343 } 2344 2345 static void 2346 g_part_fini(struct g_class *mp) 2347 { 2348 2349 TAILQ_REMOVE(&g_part_schemes, &g_part_null_scheme, scheme_list); 2350 } 2351 2352 static void 2353 g_part_unload_event(void *arg, int flag) 2354 { 2355 struct g_consumer *cp; 2356 struct g_geom *gp; 2357 struct g_provider *pp; 2358 struct g_part_scheme *scheme; 2359 struct g_part_table *table; 2360 uintptr_t *xchg; 2361 int acc, error; 2362 2363 if (flag == EV_CANCEL) 2364 return; 2365 2366 xchg = arg; 2367 error = 0; 2368 scheme = (void *)(*xchg); 2369 2370 g_topology_assert(); 2371 2372 LIST_FOREACH(gp, &g_part_class.geom, geom) { 2373 table = gp->softc; 2374 if (table->gpt_scheme != scheme) 2375 continue; 2376 2377 acc = 0; 2378 LIST_FOREACH(pp, &gp->provider, provider) 2379 acc += pp->acr + pp->acw + pp->ace; 2380 LIST_FOREACH(cp, &gp->consumer, consumer) 2381 acc += cp->acr + cp->acw + cp->ace; 2382 2383 if (!acc) 2384 g_part_wither(gp, ENOSYS); 2385 else 2386 error = EBUSY; 2387 } 2388 2389 if (!error) 2390 TAILQ_REMOVE(&g_part_schemes, scheme, scheme_list); 2391 2392 *xchg = error; 2393 } 2394 2395 int 2396 g_part_modevent(module_t mod, int type, struct g_part_scheme *scheme) 2397 { 2398 struct g_part_scheme *iter; 2399 uintptr_t arg; 2400 int error; 2401 2402 error = 0; 2403 switch (type) { 2404 case MOD_LOAD: 2405 TAILQ_FOREACH(iter, &g_part_schemes, scheme_list) { 2406 if (scheme == iter) { 2407 printf("GEOM_PART: scheme %s is already " 2408 "registered!\n", scheme->name); 2409 break; 2410 } 2411 } 2412 if (iter == NULL) { 2413 TAILQ_INSERT_TAIL(&g_part_schemes, scheme, 2414 scheme_list); 2415 g_retaste(&g_part_class); 2416 } 2417 break; 2418 case MOD_UNLOAD: 2419 arg = (uintptr_t)scheme; 2420 error = g_waitfor_event(g_part_unload_event, &arg, M_WAITOK, 2421 NULL); 2422 if (error == 0) 2423 error = arg; 2424 break; 2425 default: 2426 error = EOPNOTSUPP; 2427 break; 2428 } 2429 2430 return (error); 2431 }
Cache object: 56eb0383af000f00ce59ef0b5c0962b5
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