1185029Spjd/*- 2185029Spjd * Copyright (c) 2007 Doug Rabson 3185029Spjd * All rights reserved. 4185029Spjd * 5185029Spjd * Redistribution and use in source and binary forms, with or without 6185029Spjd * modification, are permitted provided that the following conditions 7185029Spjd * are met: 8185029Spjd * 1. Redistributions of source code must retain the above copyright 9185029Spjd * notice, this list of conditions and the following disclaimer. 10185029Spjd * 2. Redistributions in binary form must reproduce the above copyright 11185029Spjd * notice, this list of conditions and the following disclaimer in the 12185029Spjd * documentation and/or other materials provided with the distribution. 13185029Spjd * 14185029Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15185029Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16185029Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17185029Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18185029Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19185029Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20185029Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21185029Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22185029Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23185029Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24185029Spjd * SUCH DAMAGE. 25185029Spjd */ 26185029Spjd 27185029Spjd#include <sys/cdefs.h> 28185029Spjd__FBSDID("$FreeBSD: releng/10.3/sys/boot/zfs/zfsimpl.c 294975 2016-01-28 08:51:00Z smh $"); 29185029Spjd 30185029Spjd/* 31185029Spjd * Stand-alone ZFS file reader. 32185029Spjd */ 33185029Spjd 34219089Spjd#include <sys/stat.h> 35235361Savg#include <sys/stdint.h> 36219089Spjd 37185029Spjd#include "zfsimpl.h" 38185029Spjd#include "zfssubr.c" 39185029Spjd 40235329Savg 41235329Savgstruct zfsmount { 42235390Savg const spa_t *spa; 43235329Savg objset_phys_t objset; 44235329Savg uint64_t rootobj; 45235329Savg}; 46235329Savg 47185029Spjd/* 48185029Spjd * List of all vdevs, chained through v_alllink. 49185029Spjd */ 50185029Spjdstatic vdev_list_t zfs_vdevs; 51185029Spjd 52236884Smm /* 53236884Smm * List of ZFS features supported for read 54236884Smm */ 55236884Smmstatic const char *features_for_read[] = { 56263397Sdelphij "org.illumos:lz4_compress", 57263397Sdelphij "com.delphix:hole_birth", 58263397Sdelphij "com.delphix:extensible_dataset", 59268649Sdelphij "com.delphix:embedded_data", 60276081Sdelphij "org.open-zfs:large_blocks", 61236884Smm NULL 62236884Smm}; 63236884Smm 64185029Spjd/* 65185029Spjd * List of all pools, chained through spa_link. 66185029Spjd */ 67185029Spjdstatic spa_list_t zfs_pools; 68185029Spjd 69185029Spjdstatic uint64_t zfs_crc64_table[256]; 70185029Spjdstatic const dnode_phys_t *dnode_cache_obj = 0; 71185029Spjdstatic uint64_t dnode_cache_bn; 72185029Spjdstatic char *dnode_cache_buf; 73185029Spjdstatic char *zap_scratch; 74192194Sdfrstatic char *zfs_temp_buf, *zfs_temp_end, *zfs_temp_ptr; 75185029Spjd 76200309Sjhb#define TEMP_SIZE (1024 * 1024) 77185029Spjd 78235390Savgstatic int zio_read(const spa_t *spa, const blkptr_t *bp, void *buf); 79241291Savgstatic int zfs_get_root(const spa_t *spa, uint64_t *objid); 80241291Savgstatic int zfs_rlookup(const spa_t *spa, uint64_t objnum, char *result); 81198420Srnoland 82185029Spjdstatic void 83185029Spjdzfs_init(void) 84185029Spjd{ 85185029Spjd STAILQ_INIT(&zfs_vdevs); 86185029Spjd STAILQ_INIT(&zfs_pools); 87185029Spjd 88192194Sdfr zfs_temp_buf = malloc(TEMP_SIZE); 89192194Sdfr zfs_temp_end = zfs_temp_buf + TEMP_SIZE; 90192194Sdfr zfs_temp_ptr = zfs_temp_buf; 91192194Sdfr dnode_cache_buf = malloc(SPA_MAXBLOCKSIZE); 92192194Sdfr zap_scratch = malloc(SPA_MAXBLOCKSIZE); 93185029Spjd 94185029Spjd zfs_init_crc(); 95185029Spjd} 96185029Spjd 97219089Spjdstatic void * 98219089Spjdzfs_alloc(size_t size) 99192194Sdfr{ 100219089Spjd char *ptr; 101192194Sdfr 102219089Spjd if (zfs_temp_ptr + size > zfs_temp_end) { 103192194Sdfr printf("ZFS: out of temporary buffer space\n"); 104192194Sdfr for (;;) ; 105192194Sdfr } 106219089Spjd ptr = zfs_temp_ptr; 107219089Spjd zfs_temp_ptr += size; 108192194Sdfr 109219089Spjd return (ptr); 110192194Sdfr} 111192194Sdfr 112192194Sdfrstatic void 113219089Spjdzfs_free(void *ptr, size_t size) 114192194Sdfr{ 115192194Sdfr 116219089Spjd zfs_temp_ptr -= size; 117219089Spjd if (zfs_temp_ptr != ptr) { 118219089Spjd printf("ZFS: zfs_alloc()/zfs_free() mismatch\n"); 119219089Spjd for (;;) ; 120219089Spjd } 121192194Sdfr} 122192194Sdfr 123185029Spjdstatic int 124185029Spjdxdr_int(const unsigned char **xdr, int *ip) 125185029Spjd{ 126185029Spjd *ip = ((*xdr)[0] << 24) 127185029Spjd | ((*xdr)[1] << 16) 128185029Spjd | ((*xdr)[2] << 8) 129185029Spjd | ((*xdr)[3] << 0); 130185029Spjd (*xdr) += 4; 131185029Spjd return (0); 132185029Spjd} 133185029Spjd 134185029Spjdstatic int 135185029Spjdxdr_u_int(const unsigned char **xdr, u_int *ip) 136185029Spjd{ 137185029Spjd *ip = ((*xdr)[0] << 24) 138185029Spjd | ((*xdr)[1] << 16) 139185029Spjd | ((*xdr)[2] << 8) 140185029Spjd | ((*xdr)[3] << 0); 141185029Spjd (*xdr) += 4; 142185029Spjd return (0); 143185029Spjd} 144185029Spjd 145185029Spjdstatic int 146185029Spjdxdr_uint64_t(const unsigned char **xdr, uint64_t *lp) 147185029Spjd{ 148185029Spjd u_int hi, lo; 149185029Spjd 150185029Spjd xdr_u_int(xdr, &hi); 151185029Spjd xdr_u_int(xdr, &lo); 152185029Spjd *lp = (((uint64_t) hi) << 32) | lo; 153185029Spjd return (0); 154185029Spjd} 155185029Spjd 156185029Spjdstatic int 157185029Spjdnvlist_find(const unsigned char *nvlist, const char *name, int type, 158185029Spjd int* elementsp, void *valuep) 159185029Spjd{ 160185029Spjd const unsigned char *p, *pair; 161185029Spjd int junk; 162185029Spjd int encoded_size, decoded_size; 163185029Spjd 164185029Spjd p = nvlist; 165185029Spjd xdr_int(&p, &junk); 166185029Spjd xdr_int(&p, &junk); 167185029Spjd 168185029Spjd pair = p; 169185029Spjd xdr_int(&p, &encoded_size); 170185029Spjd xdr_int(&p, &decoded_size); 171185029Spjd while (encoded_size && decoded_size) { 172185029Spjd int namelen, pairtype, elements; 173185029Spjd const char *pairname; 174185029Spjd 175185029Spjd xdr_int(&p, &namelen); 176185029Spjd pairname = (const char*) p; 177185029Spjd p += roundup(namelen, 4); 178185029Spjd xdr_int(&p, &pairtype); 179185029Spjd 180185029Spjd if (!memcmp(name, pairname, namelen) && type == pairtype) { 181185029Spjd xdr_int(&p, &elements); 182185029Spjd if (elementsp) 183185029Spjd *elementsp = elements; 184185029Spjd if (type == DATA_TYPE_UINT64) { 185185029Spjd xdr_uint64_t(&p, (uint64_t *) valuep); 186185029Spjd return (0); 187185029Spjd } else if (type == DATA_TYPE_STRING) { 188185029Spjd int len; 189185029Spjd xdr_int(&p, &len); 190185029Spjd (*(const char**) valuep) = (const char*) p; 191185029Spjd return (0); 192185029Spjd } else if (type == DATA_TYPE_NVLIST 193185029Spjd || type == DATA_TYPE_NVLIST_ARRAY) { 194185029Spjd (*(const unsigned char**) valuep) = 195185029Spjd (const unsigned char*) p; 196185029Spjd return (0); 197185029Spjd } else { 198185029Spjd return (EIO); 199185029Spjd } 200185029Spjd } else { 201185029Spjd /* 202185029Spjd * Not the pair we are looking for, skip to the next one. 203185029Spjd */ 204185029Spjd p = pair + encoded_size; 205185029Spjd } 206185029Spjd 207185029Spjd pair = p; 208185029Spjd xdr_int(&p, &encoded_size); 209185029Spjd xdr_int(&p, &decoded_size); 210185029Spjd } 211185029Spjd 212185029Spjd return (EIO); 213185029Spjd} 214185029Spjd 215236884Smmstatic int 216236884Smmnvlist_check_features_for_read(const unsigned char *nvlist) 217236884Smm{ 218236884Smm const unsigned char *p, *pair; 219236884Smm int junk; 220236884Smm int encoded_size, decoded_size; 221236884Smm int rc; 222236884Smm 223236884Smm rc = 0; 224236884Smm 225236884Smm p = nvlist; 226236884Smm xdr_int(&p, &junk); 227236884Smm xdr_int(&p, &junk); 228236884Smm 229236884Smm pair = p; 230236884Smm xdr_int(&p, &encoded_size); 231236884Smm xdr_int(&p, &decoded_size); 232236884Smm while (encoded_size && decoded_size) { 233236884Smm int namelen, pairtype; 234236884Smm const char *pairname; 235236884Smm int i, found; 236236884Smm 237236884Smm found = 0; 238236884Smm 239236884Smm xdr_int(&p, &namelen); 240236884Smm pairname = (const char*) p; 241236884Smm p += roundup(namelen, 4); 242236884Smm xdr_int(&p, &pairtype); 243236884Smm 244236884Smm for (i = 0; features_for_read[i] != NULL; i++) { 245236884Smm if (!memcmp(pairname, features_for_read[i], namelen)) { 246236884Smm found = 1; 247236884Smm break; 248236884Smm } 249236884Smm } 250236884Smm 251236884Smm if (!found) { 252236884Smm printf("ZFS: unsupported feature: %s\n", pairname); 253236884Smm rc = EIO; 254236884Smm } 255236884Smm 256236884Smm p = pair + encoded_size; 257236884Smm 258236884Smm pair = p; 259236884Smm xdr_int(&p, &encoded_size); 260236884Smm xdr_int(&p, &decoded_size); 261236884Smm } 262236884Smm 263236884Smm return (rc); 264236884Smm} 265236884Smm 266185029Spjd/* 267185029Spjd * Return the next nvlist in an nvlist array. 268185029Spjd */ 269185029Spjdstatic const unsigned char * 270185029Spjdnvlist_next(const unsigned char *nvlist) 271185029Spjd{ 272185029Spjd const unsigned char *p, *pair; 273185029Spjd int junk; 274185029Spjd int encoded_size, decoded_size; 275185029Spjd 276185029Spjd p = nvlist; 277185029Spjd xdr_int(&p, &junk); 278185029Spjd xdr_int(&p, &junk); 279185029Spjd 280185029Spjd pair = p; 281185029Spjd xdr_int(&p, &encoded_size); 282185029Spjd xdr_int(&p, &decoded_size); 283185029Spjd while (encoded_size && decoded_size) { 284185029Spjd p = pair + encoded_size; 285185029Spjd 286185029Spjd pair = p; 287185029Spjd xdr_int(&p, &encoded_size); 288185029Spjd xdr_int(&p, &decoded_size); 289185029Spjd } 290185029Spjd 291185029Spjd return p; 292185029Spjd} 293185029Spjd 294185029Spjd#ifdef TEST 295185029Spjd 296185029Spjdstatic const unsigned char * 297185029Spjdnvlist_print(const unsigned char *nvlist, unsigned int indent) 298185029Spjd{ 299185029Spjd static const char* typenames[] = { 300185029Spjd "DATA_TYPE_UNKNOWN", 301185029Spjd "DATA_TYPE_BOOLEAN", 302185029Spjd "DATA_TYPE_BYTE", 303185029Spjd "DATA_TYPE_INT16", 304185029Spjd "DATA_TYPE_UINT16", 305185029Spjd "DATA_TYPE_INT32", 306185029Spjd "DATA_TYPE_UINT32", 307185029Spjd "DATA_TYPE_INT64", 308185029Spjd "DATA_TYPE_UINT64", 309185029Spjd "DATA_TYPE_STRING", 310185029Spjd "DATA_TYPE_BYTE_ARRAY", 311185029Spjd "DATA_TYPE_INT16_ARRAY", 312185029Spjd "DATA_TYPE_UINT16_ARRAY", 313185029Spjd "DATA_TYPE_INT32_ARRAY", 314185029Spjd "DATA_TYPE_UINT32_ARRAY", 315185029Spjd "DATA_TYPE_INT64_ARRAY", 316185029Spjd "DATA_TYPE_UINT64_ARRAY", 317185029Spjd "DATA_TYPE_STRING_ARRAY", 318185029Spjd "DATA_TYPE_HRTIME", 319185029Spjd "DATA_TYPE_NVLIST", 320185029Spjd "DATA_TYPE_NVLIST_ARRAY", 321185029Spjd "DATA_TYPE_BOOLEAN_VALUE", 322185029Spjd "DATA_TYPE_INT8", 323185029Spjd "DATA_TYPE_UINT8", 324185029Spjd "DATA_TYPE_BOOLEAN_ARRAY", 325185029Spjd "DATA_TYPE_INT8_ARRAY", 326185029Spjd "DATA_TYPE_UINT8_ARRAY" 327185029Spjd }; 328185029Spjd 329185029Spjd unsigned int i, j; 330185029Spjd const unsigned char *p, *pair; 331185029Spjd int junk; 332185029Spjd int encoded_size, decoded_size; 333185029Spjd 334185029Spjd p = nvlist; 335185029Spjd xdr_int(&p, &junk); 336185029Spjd xdr_int(&p, &junk); 337185029Spjd 338185029Spjd pair = p; 339185029Spjd xdr_int(&p, &encoded_size); 340185029Spjd xdr_int(&p, &decoded_size); 341185029Spjd while (encoded_size && decoded_size) { 342185029Spjd int namelen, pairtype, elements; 343185029Spjd const char *pairname; 344185029Spjd 345185029Spjd xdr_int(&p, &namelen); 346185029Spjd pairname = (const char*) p; 347185029Spjd p += roundup(namelen, 4); 348185029Spjd xdr_int(&p, &pairtype); 349185029Spjd 350185029Spjd for (i = 0; i < indent; i++) 351185029Spjd printf(" "); 352185029Spjd printf("%s %s", typenames[pairtype], pairname); 353185029Spjd 354185029Spjd xdr_int(&p, &elements); 355185029Spjd switch (pairtype) { 356185029Spjd case DATA_TYPE_UINT64: { 357185029Spjd uint64_t val; 358185029Spjd xdr_uint64_t(&p, &val); 359235361Savg printf(" = 0x%jx\n", (uintmax_t)val); 360185029Spjd break; 361185029Spjd } 362185029Spjd 363185029Spjd case DATA_TYPE_STRING: { 364185029Spjd int len; 365185029Spjd xdr_int(&p, &len); 366185029Spjd printf(" = \"%s\"\n", p); 367185029Spjd break; 368185029Spjd } 369185029Spjd 370185029Spjd case DATA_TYPE_NVLIST: 371185029Spjd printf("\n"); 372185029Spjd nvlist_print(p, indent + 1); 373185029Spjd break; 374185029Spjd 375185029Spjd case DATA_TYPE_NVLIST_ARRAY: 376185029Spjd for (j = 0; j < elements; j++) { 377185029Spjd printf("[%d]\n", j); 378185029Spjd p = nvlist_print(p, indent + 1); 379185029Spjd if (j != elements - 1) { 380185029Spjd for (i = 0; i < indent; i++) 381185029Spjd printf(" "); 382185029Spjd printf("%s %s", typenames[pairtype], pairname); 383185029Spjd } 384185029Spjd } 385185029Spjd break; 386185029Spjd 387185029Spjd default: 388185029Spjd printf("\n"); 389185029Spjd } 390185029Spjd 391185029Spjd p = pair + encoded_size; 392185029Spjd 393185029Spjd pair = p; 394185029Spjd xdr_int(&p, &encoded_size); 395185029Spjd xdr_int(&p, &decoded_size); 396185029Spjd } 397185029Spjd 398185029Spjd return p; 399185029Spjd} 400185029Spjd 401185029Spjd#endif 402185029Spjd 403185029Spjdstatic int 404192194Sdfrvdev_read_phys(vdev_t *vdev, const blkptr_t *bp, void *buf, 405192194Sdfr off_t offset, size_t size) 406185029Spjd{ 407192194Sdfr size_t psize; 408192194Sdfr int rc; 409192194Sdfr 410211091Smm if (!vdev->v_phys_read) 411211091Smm return (EIO); 412211091Smm 413192194Sdfr if (bp) { 414192194Sdfr psize = BP_GET_PSIZE(bp); 415192194Sdfr } else { 416192194Sdfr psize = size; 417192194Sdfr } 418192194Sdfr 419235361Savg /*printf("ZFS: reading %d bytes at 0x%jx to %p\n", psize, (uintmax_t)offset, buf);*/ 420192194Sdfr rc = vdev->v_phys_read(vdev, vdev->v_read_priv, offset, buf, psize); 421192194Sdfr if (rc) 422192194Sdfr return (rc); 423226568Spjd if (bp && zio_checksum_verify(bp, buf)) 424192194Sdfr return (EIO); 425192194Sdfr 426192194Sdfr return (0); 427192194Sdfr} 428192194Sdfr 429192194Sdfrstatic int 430192194Sdfrvdev_disk_read(vdev_t *vdev, const blkptr_t *bp, void *buf, 431192194Sdfr off_t offset, size_t bytes) 432192194Sdfr{ 433192194Sdfr 434192194Sdfr return (vdev_read_phys(vdev, bp, buf, 435192194Sdfr offset + VDEV_LABEL_START_SIZE, bytes)); 436192194Sdfr} 437192194Sdfr 438192194Sdfr 439192194Sdfrstatic int 440192194Sdfrvdev_mirror_read(vdev_t *vdev, const blkptr_t *bp, void *buf, 441192194Sdfr off_t offset, size_t bytes) 442192194Sdfr{ 443185029Spjd vdev_t *kid; 444185029Spjd int rc; 445185029Spjd 446185029Spjd rc = EIO; 447185029Spjd STAILQ_FOREACH(kid, &vdev->v_children, v_childlink) { 448185029Spjd if (kid->v_state != VDEV_STATE_HEALTHY) 449185029Spjd continue; 450192194Sdfr rc = kid->v_read(kid, bp, buf, offset, bytes); 451185029Spjd if (!rc) 452185029Spjd return (0); 453185029Spjd } 454185029Spjd 455185029Spjd return (rc); 456185029Spjd} 457185029Spjd 458212383Spjdstatic int 459212383Spjdvdev_replacing_read(vdev_t *vdev, const blkptr_t *bp, void *buf, 460212383Spjd off_t offset, size_t bytes) 461212383Spjd{ 462212383Spjd vdev_t *kid; 463212383Spjd 464212383Spjd /* 465212383Spjd * Here we should have two kids: 466212383Spjd * First one which is the one we are replacing and we can trust 467212383Spjd * only this one to have valid data, but it might not be present. 468212383Spjd * Second one is that one we are replacing with. It is most likely 469212383Spjd * healthy, but we can't trust it has needed data, so we won't use it. 470212383Spjd */ 471212383Spjd kid = STAILQ_FIRST(&vdev->v_children); 472212383Spjd if (kid == NULL) 473212383Spjd return (EIO); 474212383Spjd if (kid->v_state != VDEV_STATE_HEALTHY) 475212383Spjd return (EIO); 476212383Spjd return (kid->v_read(kid, bp, buf, offset, bytes)); 477212383Spjd} 478212383Spjd 479185029Spjdstatic vdev_t * 480185029Spjdvdev_find(uint64_t guid) 481185029Spjd{ 482185029Spjd vdev_t *vdev; 483185029Spjd 484185029Spjd STAILQ_FOREACH(vdev, &zfs_vdevs, v_alllink) 485185029Spjd if (vdev->v_guid == guid) 486185029Spjd return (vdev); 487185029Spjd 488185029Spjd return (0); 489185029Spjd} 490185029Spjd 491185029Spjdstatic vdev_t * 492192194Sdfrvdev_create(uint64_t guid, vdev_read_t *read) 493185029Spjd{ 494185029Spjd vdev_t *vdev; 495185029Spjd 496185029Spjd vdev = malloc(sizeof(vdev_t)); 497185029Spjd memset(vdev, 0, sizeof(vdev_t)); 498185029Spjd STAILQ_INIT(&vdev->v_children); 499185029Spjd vdev->v_guid = guid; 500185029Spjd vdev->v_state = VDEV_STATE_OFFLINE; 501185029Spjd vdev->v_read = read; 502192194Sdfr vdev->v_phys_read = 0; 503192194Sdfr vdev->v_read_priv = 0; 504185029Spjd STAILQ_INSERT_TAIL(&zfs_vdevs, vdev, v_alllink); 505185029Spjd 506185029Spjd return (vdev); 507185029Spjd} 508185029Spjd 509185029Spjdstatic int 510219089Spjdvdev_init_from_nvlist(const unsigned char *nvlist, vdev_t *pvdev, 511219089Spjd vdev_t **vdevp, int is_newer) 512185029Spjd{ 513185029Spjd int rc; 514192194Sdfr uint64_t guid, id, ashift, nparity; 515185029Spjd const char *type; 516185029Spjd const char *path; 517185029Spjd vdev_t *vdev, *kid; 518185029Spjd const unsigned char *kids; 519201689Sdelphij int nkids, i, is_new; 520212383Spjd uint64_t is_offline, is_faulted, is_degraded, is_removed, isnt_present; 521185029Spjd 522185029Spjd if (nvlist_find(nvlist, ZPOOL_CONFIG_GUID, 523185029Spjd DATA_TYPE_UINT64, 0, &guid) 524185029Spjd || nvlist_find(nvlist, ZPOOL_CONFIG_ID, 525185029Spjd DATA_TYPE_UINT64, 0, &id) 526185029Spjd || nvlist_find(nvlist, ZPOOL_CONFIG_TYPE, 527185029Spjd DATA_TYPE_STRING, 0, &type)) { 528185029Spjd printf("ZFS: can't find vdev details\n"); 529185029Spjd return (ENOENT); 530185029Spjd } 531185029Spjd 532185029Spjd if (strcmp(type, VDEV_TYPE_MIRROR) 533192194Sdfr && strcmp(type, VDEV_TYPE_DISK) 534228266Savg#ifdef ZFS_TEST 535228266Savg && strcmp(type, VDEV_TYPE_FILE) 536228266Savg#endif 537212383Spjd && strcmp(type, VDEV_TYPE_RAIDZ) 538212383Spjd && strcmp(type, VDEV_TYPE_REPLACING)) { 539219089Spjd printf("ZFS: can only boot from disk, mirror, raidz1, raidz2 and raidz3 vdevs\n"); 540185029Spjd return (EIO); 541185029Spjd } 542185029Spjd 543212383Spjd is_offline = is_removed = is_faulted = is_degraded = isnt_present = 0; 544201689Sdelphij 545201689Sdelphij nvlist_find(nvlist, ZPOOL_CONFIG_OFFLINE, DATA_TYPE_UINT64, 0, 546201689Sdelphij &is_offline); 547201689Sdelphij nvlist_find(nvlist, ZPOOL_CONFIG_REMOVED, DATA_TYPE_UINT64, 0, 548201689Sdelphij &is_removed); 549201689Sdelphij nvlist_find(nvlist, ZPOOL_CONFIG_FAULTED, DATA_TYPE_UINT64, 0, 550201689Sdelphij &is_faulted); 551201689Sdelphij nvlist_find(nvlist, ZPOOL_CONFIG_DEGRADED, DATA_TYPE_UINT64, 0, 552201689Sdelphij &is_degraded); 553212383Spjd nvlist_find(nvlist, ZPOOL_CONFIG_NOT_PRESENT, DATA_TYPE_UINT64, 0, 554212383Spjd &isnt_present); 555201689Sdelphij 556201689Sdelphij vdev = vdev_find(guid); 557201689Sdelphij if (!vdev) { 558201689Sdelphij is_new = 1; 559201689Sdelphij 560201690Sdelphij if (!strcmp(type, VDEV_TYPE_MIRROR)) 561201690Sdelphij vdev = vdev_create(guid, vdev_mirror_read); 562201690Sdelphij else if (!strcmp(type, VDEV_TYPE_RAIDZ)) 563201690Sdelphij vdev = vdev_create(guid, vdev_raidz_read); 564212383Spjd else if (!strcmp(type, VDEV_TYPE_REPLACING)) 565212383Spjd vdev = vdev_create(guid, vdev_replacing_read); 566201690Sdelphij else 567201690Sdelphij vdev = vdev_create(guid, vdev_disk_read); 568185029Spjd 569201690Sdelphij vdev->v_id = id; 570219089Spjd vdev->v_top = pvdev != NULL ? pvdev : vdev; 571201690Sdelphij if (nvlist_find(nvlist, ZPOOL_CONFIG_ASHIFT, 572201690Sdelphij DATA_TYPE_UINT64, 0, &ashift) == 0) 573201690Sdelphij vdev->v_ashift = ashift; 574201690Sdelphij else 575201690Sdelphij vdev->v_ashift = 0; 576201690Sdelphij if (nvlist_find(nvlist, ZPOOL_CONFIG_NPARITY, 577201690Sdelphij DATA_TYPE_UINT64, 0, &nparity) == 0) 578201690Sdelphij vdev->v_nparity = nparity; 579201690Sdelphij else 580201690Sdelphij vdev->v_nparity = 0; 581201690Sdelphij if (nvlist_find(nvlist, ZPOOL_CONFIG_PATH, 582201690Sdelphij DATA_TYPE_STRING, 0, &path) == 0) { 583213136Spjd if (strncmp(path, "/dev/", 5) == 0) 584201690Sdelphij path += 5; 585201690Sdelphij vdev->v_name = strdup(path); 586192194Sdfr } else { 587201690Sdelphij if (!strcmp(type, "raidz")) { 588201690Sdelphij if (vdev->v_nparity == 1) 589201690Sdelphij vdev->v_name = "raidz1"; 590219089Spjd else if (vdev->v_nparity == 2) 591201690Sdelphij vdev->v_name = "raidz2"; 592219089Spjd else if (vdev->v_nparity == 3) 593219089Spjd vdev->v_name = "raidz3"; 594219089Spjd else { 595219089Spjd printf("ZFS: can only boot from disk, mirror, raidz1, raidz2 and raidz3 vdevs\n"); 596219089Spjd return (EIO); 597219089Spjd } 598201690Sdelphij } else { 599201690Sdelphij vdev->v_name = strdup(type); 600201690Sdelphij } 601192194Sdfr } 602212382Spjd } else { 603212382Spjd is_new = 0; 604212382Spjd } 605201689Sdelphij 606212382Spjd if (is_new || is_newer) { 607212382Spjd /* 608212382Spjd * This is either new vdev or we've already seen this vdev, 609212382Spjd * but from an older vdev label, so let's refresh its state 610212382Spjd * from the newer label. 611212382Spjd */ 612201689Sdelphij if (is_offline) 613201689Sdelphij vdev->v_state = VDEV_STATE_OFFLINE; 614201689Sdelphij else if (is_removed) 615201689Sdelphij vdev->v_state = VDEV_STATE_REMOVED; 616201689Sdelphij else if (is_faulted) 617201689Sdelphij vdev->v_state = VDEV_STATE_FAULTED; 618201689Sdelphij else if (is_degraded) 619201689Sdelphij vdev->v_state = VDEV_STATE_DEGRADED; 620212383Spjd else if (isnt_present) 621212383Spjd vdev->v_state = VDEV_STATE_CANT_OPEN; 622201689Sdelphij } 623201689Sdelphij 624185029Spjd rc = nvlist_find(nvlist, ZPOOL_CONFIG_CHILDREN, 625185029Spjd DATA_TYPE_NVLIST_ARRAY, &nkids, &kids); 626185029Spjd /* 627185029Spjd * Its ok if we don't have any kids. 628185029Spjd */ 629185029Spjd if (rc == 0) { 630192194Sdfr vdev->v_nchildren = nkids; 631185029Spjd for (i = 0; i < nkids; i++) { 632219089Spjd rc = vdev_init_from_nvlist(kids, vdev, &kid, is_newer); 633185029Spjd if (rc) 634185029Spjd return (rc); 635201689Sdelphij if (is_new) 636201689Sdelphij STAILQ_INSERT_TAIL(&vdev->v_children, kid, 637201689Sdelphij v_childlink); 638185029Spjd kids = nvlist_next(kids); 639185029Spjd } 640192194Sdfr } else { 641192194Sdfr vdev->v_nchildren = 0; 642185029Spjd } 643185029Spjd 644185029Spjd if (vdevp) 645185029Spjd *vdevp = vdev; 646185029Spjd return (0); 647185029Spjd} 648185029Spjd 649185029Spjdstatic void 650185029Spjdvdev_set_state(vdev_t *vdev) 651185029Spjd{ 652185029Spjd vdev_t *kid; 653185029Spjd int good_kids; 654185029Spjd int bad_kids; 655185029Spjd 656185029Spjd /* 657192194Sdfr * A mirror or raidz is healthy if all its kids are healthy. A 658192194Sdfr * mirror is degraded if any of its kids is healthy; a raidz 659192194Sdfr * is degraded if at most nparity kids are offline. 660185029Spjd */ 661185029Spjd if (STAILQ_FIRST(&vdev->v_children)) { 662185029Spjd good_kids = 0; 663185029Spjd bad_kids = 0; 664185029Spjd STAILQ_FOREACH(kid, &vdev->v_children, v_childlink) { 665185029Spjd if (kid->v_state == VDEV_STATE_HEALTHY) 666185029Spjd good_kids++; 667185029Spjd else 668185029Spjd bad_kids++; 669185029Spjd } 670192194Sdfr if (bad_kids == 0) { 671192194Sdfr vdev->v_state = VDEV_STATE_HEALTHY; 672185029Spjd } else { 673192194Sdfr if (vdev->v_read == vdev_mirror_read) { 674192194Sdfr if (good_kids) { 675192194Sdfr vdev->v_state = VDEV_STATE_DEGRADED; 676192194Sdfr } else { 677192194Sdfr vdev->v_state = VDEV_STATE_OFFLINE; 678192194Sdfr } 679192194Sdfr } else if (vdev->v_read == vdev_raidz_read) { 680192194Sdfr if (bad_kids > vdev->v_nparity) { 681192194Sdfr vdev->v_state = VDEV_STATE_OFFLINE; 682192194Sdfr } else { 683192194Sdfr vdev->v_state = VDEV_STATE_DEGRADED; 684192194Sdfr } 685192194Sdfr } 686185029Spjd } 687185029Spjd } 688185029Spjd} 689185029Spjd 690185029Spjdstatic spa_t * 691185029Spjdspa_find_by_guid(uint64_t guid) 692185029Spjd{ 693185029Spjd spa_t *spa; 694185029Spjd 695185029Spjd STAILQ_FOREACH(spa, &zfs_pools, spa_link) 696185029Spjd if (spa->spa_guid == guid) 697185029Spjd return (spa); 698185029Spjd 699185029Spjd return (0); 700185029Spjd} 701185029Spjd 702185029Spjdstatic spa_t * 703185029Spjdspa_find_by_name(const char *name) 704185029Spjd{ 705185029Spjd spa_t *spa; 706185029Spjd 707185029Spjd STAILQ_FOREACH(spa, &zfs_pools, spa_link) 708185029Spjd if (!strcmp(spa->spa_name, name)) 709185029Spjd return (spa); 710185029Spjd 711185029Spjd return (0); 712185029Spjd} 713185029Spjd 714241293Savg#ifdef BOOT2 715235329Savgstatic spa_t * 716241293Savgspa_get_primary(void) 717241293Savg{ 718241293Savg 719241293Savg return (STAILQ_FIRST(&zfs_pools)); 720241293Savg} 721241293Savg 722241293Savgstatic vdev_t * 723241293Savgspa_get_primary_vdev(const spa_t *spa) 724241293Savg{ 725241293Savg vdev_t *vdev; 726241293Savg vdev_t *kid; 727241293Savg 728241293Savg if (spa == NULL) 729241293Savg spa = spa_get_primary(); 730241293Savg if (spa == NULL) 731241293Savg return (NULL); 732241293Savg vdev = STAILQ_FIRST(&spa->spa_vdevs); 733241293Savg if (vdev == NULL) 734241293Savg return (NULL); 735241293Savg for (kid = STAILQ_FIRST(&vdev->v_children); kid != NULL; 736241293Savg kid = STAILQ_FIRST(&vdev->v_children)) 737241293Savg vdev = kid; 738241293Savg return (vdev); 739241293Savg} 740241293Savg#endif 741241293Savg 742241293Savgstatic spa_t * 743185029Spjdspa_create(uint64_t guid) 744185029Spjd{ 745185029Spjd spa_t *spa; 746185029Spjd 747185029Spjd spa = malloc(sizeof(spa_t)); 748185029Spjd memset(spa, 0, sizeof(spa_t)); 749185029Spjd STAILQ_INIT(&spa->spa_vdevs); 750185029Spjd spa->spa_guid = guid; 751185029Spjd STAILQ_INSERT_TAIL(&zfs_pools, spa, spa_link); 752185029Spjd 753185029Spjd return (spa); 754185029Spjd} 755185029Spjd 756185029Spjdstatic const char * 757185029Spjdstate_name(vdev_state_t state) 758185029Spjd{ 759185029Spjd static const char* names[] = { 760185029Spjd "UNKNOWN", 761185029Spjd "CLOSED", 762185029Spjd "OFFLINE", 763201689Sdelphij "REMOVED", 764185029Spjd "CANT_OPEN", 765201689Sdelphij "FAULTED", 766185029Spjd "DEGRADED", 767185029Spjd "ONLINE" 768185029Spjd }; 769185029Spjd return names[state]; 770185029Spjd} 771185029Spjd 772185029Spjd#ifdef BOOT2 773185029Spjd 774185029Spjd#define pager_printf printf 775185029Spjd 776185029Spjd#else 777185029Spjd 778185029Spjdstatic void 779185029Spjdpager_printf(const char *fmt, ...) 780185029Spjd{ 781185029Spjd char line[80]; 782185029Spjd va_list args; 783185029Spjd 784185029Spjd va_start(args, fmt); 785185029Spjd vsprintf(line, fmt, args); 786185029Spjd va_end(args); 787185029Spjd pager_output(line); 788185029Spjd} 789185029Spjd 790185029Spjd#endif 791185029Spjd 792213136Spjd#define STATUS_FORMAT " %s %s\n" 793185029Spjd 794185029Spjdstatic void 795185029Spjdprint_state(int indent, const char *name, vdev_state_t state) 796185029Spjd{ 797185029Spjd int i; 798185029Spjd char buf[512]; 799185029Spjd 800185029Spjd buf[0] = 0; 801185029Spjd for (i = 0; i < indent; i++) 802185029Spjd strcat(buf, " "); 803185029Spjd strcat(buf, name); 804185029Spjd pager_printf(STATUS_FORMAT, buf, state_name(state)); 805185029Spjd 806185029Spjd} 807185029Spjd 808185029Spjdstatic void 809185029Spjdvdev_status(vdev_t *vdev, int indent) 810185029Spjd{ 811185029Spjd vdev_t *kid; 812185029Spjd print_state(indent, vdev->v_name, vdev->v_state); 813185029Spjd 814185029Spjd STAILQ_FOREACH(kid, &vdev->v_children, v_childlink) { 815185029Spjd vdev_status(kid, indent + 1); 816185029Spjd } 817185029Spjd} 818185029Spjd 819185029Spjdstatic void 820185029Spjdspa_status(spa_t *spa) 821185029Spjd{ 822241291Savg static char bootfs[ZFS_MAXNAMELEN]; 823241291Savg uint64_t rootid; 824185029Spjd vdev_t *vdev; 825185029Spjd int good_kids, bad_kids, degraded_kids; 826185029Spjd vdev_state_t state; 827185029Spjd 828185029Spjd pager_printf(" pool: %s\n", spa->spa_name); 829241291Savg if (zfs_get_root(spa, &rootid) == 0 && 830241291Savg zfs_rlookup(spa, rootid, bootfs) == 0) { 831241291Savg if (bootfs[0] == '\0') 832241291Savg pager_printf("bootfs: %s\n", spa->spa_name); 833241291Savg else 834241291Savg pager_printf("bootfs: %s/%s\n", spa->spa_name, bootfs); 835241291Savg } 836185029Spjd pager_printf("config:\n\n"); 837185029Spjd pager_printf(STATUS_FORMAT, "NAME", "STATE"); 838185029Spjd 839185029Spjd good_kids = 0; 840185029Spjd degraded_kids = 0; 841185029Spjd bad_kids = 0; 842185029Spjd STAILQ_FOREACH(vdev, &spa->spa_vdevs, v_childlink) { 843185029Spjd if (vdev->v_state == VDEV_STATE_HEALTHY) 844185029Spjd good_kids++; 845185029Spjd else if (vdev->v_state == VDEV_STATE_DEGRADED) 846185029Spjd degraded_kids++; 847185029Spjd else 848185029Spjd bad_kids++; 849185029Spjd } 850185029Spjd 851185029Spjd state = VDEV_STATE_CLOSED; 852185029Spjd if (good_kids > 0 && (degraded_kids + bad_kids) == 0) 853185029Spjd state = VDEV_STATE_HEALTHY; 854185029Spjd else if ((good_kids + degraded_kids) > 0) 855185029Spjd state = VDEV_STATE_DEGRADED; 856185029Spjd 857185029Spjd print_state(0, spa->spa_name, state); 858185029Spjd STAILQ_FOREACH(vdev, &spa->spa_vdevs, v_childlink) { 859185029Spjd vdev_status(vdev, 1); 860185029Spjd } 861185029Spjd} 862185029Spjd 863185029Spjdstatic void 864185029Spjdspa_all_status(void) 865185029Spjd{ 866185029Spjd spa_t *spa; 867185029Spjd int first = 1; 868185029Spjd 869185029Spjd STAILQ_FOREACH(spa, &zfs_pools, spa_link) { 870185029Spjd if (!first) 871185029Spjd pager_printf("\n"); 872185029Spjd first = 0; 873185029Spjd spa_status(spa); 874185029Spjd } 875185029Spjd} 876185029Spjd 877185029Spjdstatic int 878192194Sdfrvdev_probe(vdev_phys_read_t *read, void *read_priv, spa_t **spap) 879185029Spjd{ 880185029Spjd vdev_t vtmp; 881185029Spjd vdev_phys_t *vdev_label = (vdev_phys_t *) zap_scratch; 882185029Spjd spa_t *spa; 883185029Spjd vdev_t *vdev, *top_vdev, *pool_vdev; 884185029Spjd off_t off; 885185029Spjd blkptr_t bp; 886185029Spjd const unsigned char *nvlist; 887185029Spjd uint64_t val; 888185029Spjd uint64_t guid; 889185029Spjd uint64_t pool_txg, pool_guid; 890212384Spjd uint64_t is_log; 891185029Spjd const char *pool_name; 892185029Spjd const unsigned char *vdevs; 893236884Smm const unsigned char *features; 894201689Sdelphij int i, rc, is_newer; 895219089Spjd char *upbuf; 896185029Spjd const struct uberblock *up; 897185029Spjd 898185029Spjd /* 899185029Spjd * Load the vdev label and figure out which 900185029Spjd * uberblock is most current. 901185029Spjd */ 902185029Spjd memset(&vtmp, 0, sizeof(vtmp)); 903192194Sdfr vtmp.v_phys_read = read; 904185029Spjd vtmp.v_read_priv = read_priv; 905185029Spjd off = offsetof(vdev_label_t, vl_vdev_phys); 906185029Spjd BP_ZERO(&bp); 907185029Spjd BP_SET_LSIZE(&bp, sizeof(vdev_phys_t)); 908185029Spjd BP_SET_PSIZE(&bp, sizeof(vdev_phys_t)); 909185029Spjd BP_SET_CHECKSUM(&bp, ZIO_CHECKSUM_LABEL); 910185029Spjd BP_SET_COMPRESS(&bp, ZIO_COMPRESS_OFF); 911226568Spjd DVA_SET_OFFSET(BP_IDENTITY(&bp), off); 912185029Spjd ZIO_SET_CHECKSUM(&bp.blk_cksum, off, 0, 0, 0); 913192194Sdfr if (vdev_read_phys(&vtmp, &bp, vdev_label, off, 0)) 914185029Spjd return (EIO); 915185029Spjd 916185029Spjd if (vdev_label->vp_nvlist[0] != NV_ENCODE_XDR) { 917185029Spjd return (EIO); 918185029Spjd } 919185029Spjd 920185029Spjd nvlist = (const unsigned char *) vdev_label->vp_nvlist + 4; 921185029Spjd 922185029Spjd if (nvlist_find(nvlist, 923185029Spjd ZPOOL_CONFIG_VERSION, 924185029Spjd DATA_TYPE_UINT64, 0, &val)) { 925185029Spjd return (EIO); 926185029Spjd } 927185029Spjd 928236884Smm if (!SPA_VERSION_IS_SUPPORTED(val)) { 929185097Sdfr printf("ZFS: unsupported ZFS version %u (should be %u)\n", 930185097Sdfr (unsigned) val, (unsigned) SPA_VERSION); 931185029Spjd return (EIO); 932185029Spjd } 933185029Spjd 934236884Smm /* Check ZFS features for read */ 935237001Smm if (nvlist_find(nvlist, 936237001Smm ZPOOL_CONFIG_FEATURES_FOR_READ, 937237001Smm DATA_TYPE_NVLIST, 0, &features) == 0 938237001Smm && nvlist_check_features_for_read(features) != 0) 939236884Smm return (EIO); 940236884Smm 941185029Spjd if (nvlist_find(nvlist, 942185029Spjd ZPOOL_CONFIG_POOL_STATE, 943185029Spjd DATA_TYPE_UINT64, 0, &val)) { 944185029Spjd return (EIO); 945185029Spjd } 946185029Spjd 947219089Spjd if (val == POOL_STATE_DESTROYED) { 948219089Spjd /* We don't boot only from destroyed pools. */ 949185029Spjd return (EIO); 950185029Spjd } 951185029Spjd 952185029Spjd if (nvlist_find(nvlist, 953185029Spjd ZPOOL_CONFIG_POOL_TXG, 954185029Spjd DATA_TYPE_UINT64, 0, &pool_txg) 955185029Spjd || nvlist_find(nvlist, 956185029Spjd ZPOOL_CONFIG_POOL_GUID, 957185029Spjd DATA_TYPE_UINT64, 0, &pool_guid) 958185029Spjd || nvlist_find(nvlist, 959185029Spjd ZPOOL_CONFIG_POOL_NAME, 960185029Spjd DATA_TYPE_STRING, 0, &pool_name)) { 961192194Sdfr /* 962192194Sdfr * Cache and spare devices end up here - just ignore 963192194Sdfr * them. 964192194Sdfr */ 965192194Sdfr /*printf("ZFS: can't find pool details\n");*/ 966185029Spjd return (EIO); 967185029Spjd } 968185029Spjd 969212384Spjd is_log = 0; 970212384Spjd (void) nvlist_find(nvlist, ZPOOL_CONFIG_IS_LOG, DATA_TYPE_UINT64, 0, 971212384Spjd &is_log); 972212384Spjd if (is_log) 973212384Spjd return (EIO); 974212384Spjd 975185029Spjd /* 976185029Spjd * Create the pool if this is the first time we've seen it. 977185029Spjd */ 978185029Spjd spa = spa_find_by_guid(pool_guid); 979185029Spjd if (!spa) { 980185029Spjd spa = spa_create(pool_guid); 981185029Spjd spa->spa_name = strdup(pool_name); 982185029Spjd } 983201689Sdelphij if (pool_txg > spa->spa_txg) { 984185029Spjd spa->spa_txg = pool_txg; 985201689Sdelphij is_newer = 1; 986201689Sdelphij } else 987201689Sdelphij is_newer = 0; 988185029Spjd 989185029Spjd /* 990185029Spjd * Get the vdev tree and create our in-core copy of it. 991201689Sdelphij * If we already have a vdev with this guid, this must 992185029Spjd * be some kind of alias (overlapping slices, dangerously dedicated 993185029Spjd * disks etc). 994185029Spjd */ 995185029Spjd if (nvlist_find(nvlist, 996185029Spjd ZPOOL_CONFIG_GUID, 997185029Spjd DATA_TYPE_UINT64, 0, &guid)) { 998185029Spjd return (EIO); 999185029Spjd } 1000185029Spjd vdev = vdev_find(guid); 1001201689Sdelphij if (vdev && vdev->v_phys_read) /* Has this vdev already been inited? */ 1002185029Spjd return (EIO); 1003185029Spjd 1004185029Spjd if (nvlist_find(nvlist, 1005185029Spjd ZPOOL_CONFIG_VDEV_TREE, 1006185029Spjd DATA_TYPE_NVLIST, 0, &vdevs)) { 1007185029Spjd return (EIO); 1008185029Spjd } 1009201689Sdelphij 1010219089Spjd rc = vdev_init_from_nvlist(vdevs, NULL, &top_vdev, is_newer); 1011185852Sdfr if (rc) 1012185852Sdfr return (rc); 1013185029Spjd 1014185029Spjd /* 1015185029Spjd * Add the toplevel vdev to the pool if its not already there. 1016185029Spjd */ 1017185029Spjd STAILQ_FOREACH(pool_vdev, &spa->spa_vdevs, v_childlink) 1018185029Spjd if (top_vdev == pool_vdev) 1019185029Spjd break; 1020185029Spjd if (!pool_vdev && top_vdev) 1021185029Spjd STAILQ_INSERT_TAIL(&spa->spa_vdevs, top_vdev, v_childlink); 1022185029Spjd 1023185029Spjd /* 1024185029Spjd * We should already have created an incomplete vdev for this 1025185029Spjd * vdev. Find it and initialise it with our read proc. 1026185029Spjd */ 1027185029Spjd vdev = vdev_find(guid); 1028185029Spjd if (vdev) { 1029192194Sdfr vdev->v_phys_read = read; 1030185029Spjd vdev->v_read_priv = read_priv; 1031226551Spjd vdev->v_state = VDEV_STATE_HEALTHY; 1032185029Spjd } else { 1033185029Spjd printf("ZFS: inconsistent nvlist contents\n"); 1034185029Spjd return (EIO); 1035185029Spjd } 1036185029Spjd 1037185029Spjd /* 1038185029Spjd * Re-evaluate top-level vdev state. 1039185029Spjd */ 1040185029Spjd vdev_set_state(top_vdev); 1041185029Spjd 1042185029Spjd /* 1043185029Spjd * Ok, we are happy with the pool so far. Lets find 1044185029Spjd * the best uberblock and then we can actually access 1045185029Spjd * the contents of the pool. 1046185029Spjd */ 1047219089Spjd upbuf = zfs_alloc(VDEV_UBERBLOCK_SIZE(vdev)); 1048219089Spjd up = (const struct uberblock *)upbuf; 1049185029Spjd for (i = 0; 1050219089Spjd i < VDEV_UBERBLOCK_COUNT(vdev); 1051185029Spjd i++) { 1052219089Spjd off = VDEV_UBERBLOCK_OFFSET(vdev, i); 1053185029Spjd BP_ZERO(&bp); 1054185029Spjd DVA_SET_OFFSET(&bp.blk_dva[0], off); 1055219089Spjd BP_SET_LSIZE(&bp, VDEV_UBERBLOCK_SIZE(vdev)); 1056219089Spjd BP_SET_PSIZE(&bp, VDEV_UBERBLOCK_SIZE(vdev)); 1057185029Spjd BP_SET_CHECKSUM(&bp, ZIO_CHECKSUM_LABEL); 1058185029Spjd BP_SET_COMPRESS(&bp, ZIO_COMPRESS_OFF); 1059185029Spjd ZIO_SET_CHECKSUM(&bp.blk_cksum, off, 0, 0, 0); 1060219089Spjd 1061226568Spjd if (vdev_read_phys(vdev, &bp, upbuf, off, 0)) 1062185029Spjd continue; 1063185029Spjd 1064185029Spjd if (up->ub_magic != UBERBLOCK_MAGIC) 1065185029Spjd continue; 1066185029Spjd if (up->ub_txg < spa->spa_txg) 1067185029Spjd continue; 1068185029Spjd if (up->ub_txg > spa->spa_uberblock.ub_txg) { 1069185029Spjd spa->spa_uberblock = *up; 1070185029Spjd } else if (up->ub_txg == spa->spa_uberblock.ub_txg) { 1071185029Spjd if (up->ub_timestamp > spa->spa_uberblock.ub_timestamp) 1072185029Spjd spa->spa_uberblock = *up; 1073185029Spjd } 1074185029Spjd } 1075219089Spjd zfs_free(upbuf, VDEV_UBERBLOCK_SIZE(vdev)); 1076185029Spjd 1077185029Spjd if (spap) 1078185029Spjd *spap = spa; 1079185029Spjd return (0); 1080185029Spjd} 1081185029Spjd 1082185029Spjdstatic int 1083185029Spjdilog2(int n) 1084185029Spjd{ 1085185029Spjd int v; 1086185029Spjd 1087185029Spjd for (v = 0; v < 32; v++) 1088185029Spjd if (n == (1 << v)) 1089185029Spjd return v; 1090185029Spjd return -1; 1091185029Spjd} 1092185029Spjd 1093185029Spjdstatic int 1094235390Savgzio_read_gang(const spa_t *spa, const blkptr_t *bp, void *buf) 1095198420Srnoland{ 1096226568Spjd blkptr_t gbh_bp; 1097198420Srnoland zio_gbh_phys_t zio_gb; 1098226568Spjd char *pbuf; 1099198420Srnoland int i; 1100198420Srnoland 1101226568Spjd /* Artificial BP for gang block header. */ 1102226568Spjd gbh_bp = *bp; 1103226568Spjd BP_SET_PSIZE(&gbh_bp, SPA_GANGBLOCKSIZE); 1104226568Spjd BP_SET_LSIZE(&gbh_bp, SPA_GANGBLOCKSIZE); 1105226568Spjd BP_SET_CHECKSUM(&gbh_bp, ZIO_CHECKSUM_GANG_HEADER); 1106226568Spjd BP_SET_COMPRESS(&gbh_bp, ZIO_COMPRESS_OFF); 1107226568Spjd for (i = 0; i < SPA_DVAS_PER_BP; i++) 1108226568Spjd DVA_SET_GANG(&gbh_bp.blk_dva[i], 0); 1109226552Spjd 1110226568Spjd /* Read gang header block using the artificial BP. */ 1111226568Spjd if (zio_read(spa, &gbh_bp, &zio_gb)) 1112198420Srnoland return (EIO); 1113198420Srnoland 1114226568Spjd pbuf = buf; 1115198420Srnoland for (i = 0; i < SPA_GBH_NBLKPTRS; i++) { 1116208610Savg blkptr_t *gbp = &zio_gb.zg_blkptr[i]; 1117208610Savg 1118208610Savg if (BP_IS_HOLE(gbp)) 1119208610Savg continue; 1120226568Spjd if (zio_read(spa, gbp, pbuf)) 1121198420Srnoland return (EIO); 1122226568Spjd pbuf += BP_GET_PSIZE(gbp); 1123198420Srnoland } 1124226568Spjd 1125226568Spjd if (zio_checksum_verify(bp, buf)) 1126226568Spjd return (EIO); 1127198420Srnoland return (0); 1128198420Srnoland} 1129198420Srnoland 1130198420Srnolandstatic int 1131235390Savgzio_read(const spa_t *spa, const blkptr_t *bp, void *buf) 1132185029Spjd{ 1133185029Spjd int cpfunc = BP_GET_COMPRESS(bp); 1134219089Spjd uint64_t align, size; 1135192194Sdfr void *pbuf; 1136219089Spjd int i, error; 1137185029Spjd 1138268649Sdelphij /* 1139268649Sdelphij * Process data embedded in block pointer 1140268649Sdelphij */ 1141268649Sdelphij if (BP_IS_EMBEDDED(bp)) { 1142268649Sdelphij ASSERT(BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA); 1143268649Sdelphij 1144268649Sdelphij size = BPE_GET_PSIZE(bp); 1145268649Sdelphij ASSERT(size <= BPE_PAYLOAD_SIZE); 1146268649Sdelphij 1147268649Sdelphij if (cpfunc != ZIO_COMPRESS_OFF) 1148268649Sdelphij pbuf = zfs_alloc(size); 1149268649Sdelphij else 1150268649Sdelphij pbuf = buf; 1151268649Sdelphij 1152268649Sdelphij decode_embedded_bp_compressed(bp, pbuf); 1153268649Sdelphij error = 0; 1154268649Sdelphij 1155268649Sdelphij if (cpfunc != ZIO_COMPRESS_OFF) { 1156268649Sdelphij error = zio_decompress_data(cpfunc, pbuf, 1157268649Sdelphij size, buf, BP_GET_LSIZE(bp)); 1158268649Sdelphij zfs_free(pbuf, size); 1159268649Sdelphij } 1160268649Sdelphij if (error != 0) 1161268649Sdelphij printf("ZFS: i/o error - unable to decompress block pointer data, error %d\n", 1162268649Sdelphij error); 1163268649Sdelphij return (error); 1164268649Sdelphij } 1165268649Sdelphij 1166219089Spjd error = EIO; 1167185029Spjd 1168185029Spjd for (i = 0; i < SPA_DVAS_PER_BP; i++) { 1169185029Spjd const dva_t *dva = &bp->blk_dva[i]; 1170185029Spjd vdev_t *vdev; 1171185029Spjd int vdevid; 1172185029Spjd off_t offset; 1173185029Spjd 1174185029Spjd if (!dva->dva_word[0] && !dva->dva_word[1]) 1175185029Spjd continue; 1176185029Spjd 1177226568Spjd vdevid = DVA_GET_VDEV(dva); 1178226568Spjd offset = DVA_GET_OFFSET(dva); 1179226568Spjd STAILQ_FOREACH(vdev, &spa->spa_vdevs, v_childlink) { 1180226568Spjd if (vdev->v_id == vdevid) 1181226568Spjd break; 1182226568Spjd } 1183226568Spjd if (!vdev || !vdev->v_read) 1184226568Spjd continue; 1185185029Spjd 1186226568Spjd size = BP_GET_PSIZE(bp); 1187226568Spjd if (vdev->v_read == vdev_raidz_read) { 1188219089Spjd align = 1ULL << vdev->v_top->v_ashift; 1189219089Spjd if (P2PHASE(size, align) != 0) 1190219089Spjd size = P2ROUNDUP(size, align); 1191226568Spjd } 1192226568Spjd if (size != BP_GET_PSIZE(bp) || cpfunc != ZIO_COMPRESS_OFF) 1193226568Spjd pbuf = zfs_alloc(size); 1194226568Spjd else 1195226568Spjd pbuf = buf; 1196219089Spjd 1197226568Spjd if (DVA_GET_GANG(dva)) 1198226568Spjd error = zio_read_gang(spa, bp, pbuf); 1199226568Spjd else 1200219089Spjd error = vdev->v_read(vdev, bp, pbuf, offset, size); 1201226568Spjd if (error == 0) { 1202226568Spjd if (cpfunc != ZIO_COMPRESS_OFF) 1203226568Spjd error = zio_decompress_data(cpfunc, pbuf, 1204226568Spjd BP_GET_PSIZE(bp), buf, BP_GET_LSIZE(bp)); 1205226568Spjd else if (size != BP_GET_PSIZE(bp)) 1206226568Spjd bcopy(pbuf, buf, BP_GET_PSIZE(bp)); 1207192194Sdfr } 1208226568Spjd if (buf != pbuf) 1209226568Spjd zfs_free(pbuf, size); 1210226568Spjd if (error == 0) 1211226568Spjd break; 1212185029Spjd } 1213219089Spjd if (error != 0) 1214219089Spjd printf("ZFS: i/o error - all block copies unavailable\n"); 1215219089Spjd return (error); 1216185029Spjd} 1217185029Spjd 1218185029Spjdstatic int 1219235390Savgdnode_read(const spa_t *spa, const dnode_phys_t *dnode, off_t offset, void *buf, size_t buflen) 1220185029Spjd{ 1221185029Spjd int ibshift = dnode->dn_indblkshift - SPA_BLKPTRSHIFT; 1222185029Spjd int bsize = dnode->dn_datablkszsec << SPA_MINBLOCKSHIFT; 1223185029Spjd int nlevels = dnode->dn_nlevels; 1224185029Spjd int i, rc; 1225185029Spjd 1226276081Sdelphij if (bsize > SPA_MAXBLOCKSIZE) { 1227276081Sdelphij printf("ZFS: I/O error - blocks larger than 128K are not supported\n"); 1228276081Sdelphij return (EIO); 1229276081Sdelphij } 1230276081Sdelphij 1231185029Spjd /* 1232186243Sdfr * Note: bsize may not be a power of two here so we need to do an 1233186243Sdfr * actual divide rather than a bitshift. 1234185029Spjd */ 1235185029Spjd while (buflen > 0) { 1236186243Sdfr uint64_t bn = offset / bsize; 1237186243Sdfr int boff = offset % bsize; 1238185029Spjd int ibn; 1239185029Spjd const blkptr_t *indbp; 1240185029Spjd blkptr_t bp; 1241185029Spjd 1242185029Spjd if (bn > dnode->dn_maxblkid) 1243185029Spjd return (EIO); 1244185029Spjd 1245185029Spjd if (dnode == dnode_cache_obj && bn == dnode_cache_bn) 1246185029Spjd goto cached; 1247185029Spjd 1248185029Spjd indbp = dnode->dn_blkptr; 1249185029Spjd for (i = 0; i < nlevels; i++) { 1250185029Spjd /* 1251185029Spjd * Copy the bp from the indirect array so that 1252185029Spjd * we can re-use the scratch buffer for multi-level 1253185029Spjd * objects. 1254185029Spjd */ 1255185029Spjd ibn = bn >> ((nlevels - i - 1) * ibshift); 1256185029Spjd ibn &= ((1 << ibshift) - 1); 1257185029Spjd bp = indbp[ibn]; 1258284509Savg if (BP_IS_HOLE(&bp)) { 1259284509Savg memset(dnode_cache_buf, 0, bsize); 1260284509Savg break; 1261284509Savg } 1262185029Spjd rc = zio_read(spa, &bp, dnode_cache_buf); 1263185029Spjd if (rc) 1264185029Spjd return (rc); 1265185029Spjd indbp = (const blkptr_t *) dnode_cache_buf; 1266185029Spjd } 1267185029Spjd dnode_cache_obj = dnode; 1268185029Spjd dnode_cache_bn = bn; 1269185029Spjd cached: 1270185029Spjd 1271185029Spjd /* 1272185029Spjd * The buffer contains our data block. Copy what we 1273185029Spjd * need from it and loop. 1274185029Spjd */ 1275185029Spjd i = bsize - boff; 1276185029Spjd if (i > buflen) i = buflen; 1277185029Spjd memcpy(buf, &dnode_cache_buf[boff], i); 1278185029Spjd buf = ((char*) buf) + i; 1279185029Spjd offset += i; 1280185029Spjd buflen -= i; 1281185029Spjd } 1282185029Spjd 1283185029Spjd return (0); 1284185029Spjd} 1285185029Spjd 1286185029Spjd/* 1287185029Spjd * Lookup a value in a microzap directory. Assumes that the zap 1288185029Spjd * scratch buffer contains the directory contents. 1289185029Spjd */ 1290185029Spjdstatic int 1291235390Savgmzap_lookup(const dnode_phys_t *dnode, const char *name, uint64_t *value) 1292185029Spjd{ 1293185029Spjd const mzap_phys_t *mz; 1294185029Spjd const mzap_ent_phys_t *mze; 1295185029Spjd size_t size; 1296185029Spjd int chunks, i; 1297185029Spjd 1298185029Spjd /* 1299185029Spjd * Microzap objects use exactly one block. Read the whole 1300185029Spjd * thing. 1301185029Spjd */ 1302185029Spjd size = dnode->dn_datablkszsec * 512; 1303185029Spjd 1304185029Spjd mz = (const mzap_phys_t *) zap_scratch; 1305185029Spjd chunks = size / MZAP_ENT_LEN - 1; 1306185029Spjd 1307185029Spjd for (i = 0; i < chunks; i++) { 1308185029Spjd mze = &mz->mz_chunk[i]; 1309185029Spjd if (!strcmp(mze->mze_name, name)) { 1310185029Spjd *value = mze->mze_value; 1311185029Spjd return (0); 1312185029Spjd } 1313185029Spjd } 1314185029Spjd 1315185029Spjd return (ENOENT); 1316185029Spjd} 1317185029Spjd 1318185029Spjd/* 1319185029Spjd * Compare a name with a zap leaf entry. Return non-zero if the name 1320185029Spjd * matches. 1321185029Spjd */ 1322185029Spjdstatic int 1323185029Spjdfzap_name_equal(const zap_leaf_t *zl, const zap_leaf_chunk_t *zc, const char *name) 1324185029Spjd{ 1325185029Spjd size_t namelen; 1326185029Spjd const zap_leaf_chunk_t *nc; 1327185029Spjd const char *p; 1328185029Spjd 1329240346Savg namelen = zc->l_entry.le_name_numints; 1330185029Spjd 1331185029Spjd nc = &ZAP_LEAF_CHUNK(zl, zc->l_entry.le_name_chunk); 1332185029Spjd p = name; 1333185029Spjd while (namelen > 0) { 1334185029Spjd size_t len; 1335185029Spjd len = namelen; 1336185029Spjd if (len > ZAP_LEAF_ARRAY_BYTES) 1337185029Spjd len = ZAP_LEAF_ARRAY_BYTES; 1338185029Spjd if (memcmp(p, nc->l_array.la_array, len)) 1339185029Spjd return (0); 1340185029Spjd p += len; 1341185029Spjd namelen -= len; 1342185029Spjd nc = &ZAP_LEAF_CHUNK(zl, nc->l_array.la_next); 1343185029Spjd } 1344185029Spjd 1345185029Spjd return 1; 1346185029Spjd} 1347185029Spjd 1348185029Spjd/* 1349185029Spjd * Extract a uint64_t value from a zap leaf entry. 1350185029Spjd */ 1351185029Spjdstatic uint64_t 1352185029Spjdfzap_leaf_value(const zap_leaf_t *zl, const zap_leaf_chunk_t *zc) 1353185029Spjd{ 1354185029Spjd const zap_leaf_chunk_t *vc; 1355185029Spjd int i; 1356185029Spjd uint64_t value; 1357185029Spjd const uint8_t *p; 1358185029Spjd 1359185029Spjd vc = &ZAP_LEAF_CHUNK(zl, zc->l_entry.le_value_chunk); 1360185029Spjd for (i = 0, value = 0, p = vc->l_array.la_array; i < 8; i++) { 1361185029Spjd value = (value << 8) | p[i]; 1362185029Spjd } 1363185029Spjd 1364185029Spjd return value; 1365185029Spjd} 1366185029Spjd 1367185029Spjd/* 1368185029Spjd * Lookup a value in a fatzap directory. Assumes that the zap scratch 1369185029Spjd * buffer contains the directory header. 1370185029Spjd */ 1371185029Spjdstatic int 1372235390Savgfzap_lookup(const spa_t *spa, const dnode_phys_t *dnode, const char *name, uint64_t *value) 1373185029Spjd{ 1374185029Spjd int bsize = dnode->dn_datablkszsec << SPA_MINBLOCKSHIFT; 1375185029Spjd zap_phys_t zh = *(zap_phys_t *) zap_scratch; 1376185029Spjd fat_zap_t z; 1377185029Spjd uint64_t *ptrtbl; 1378185029Spjd uint64_t hash; 1379185029Spjd int rc; 1380185029Spjd 1381185029Spjd if (zh.zap_magic != ZAP_MAGIC) 1382185029Spjd return (EIO); 1383185029Spjd 1384185029Spjd z.zap_block_shift = ilog2(bsize); 1385185029Spjd z.zap_phys = (zap_phys_t *) zap_scratch; 1386185029Spjd 1387185029Spjd /* 1388185029Spjd * Figure out where the pointer table is and read it in if necessary. 1389185029Spjd */ 1390185029Spjd if (zh.zap_ptrtbl.zt_blk) { 1391185029Spjd rc = dnode_read(spa, dnode, zh.zap_ptrtbl.zt_blk * bsize, 1392185029Spjd zap_scratch, bsize); 1393185029Spjd if (rc) 1394185029Spjd return (rc); 1395185029Spjd ptrtbl = (uint64_t *) zap_scratch; 1396185029Spjd } else { 1397185029Spjd ptrtbl = &ZAP_EMBEDDED_PTRTBL_ENT(&z, 0); 1398185029Spjd } 1399185029Spjd 1400185029Spjd hash = zap_hash(zh.zap_salt, name); 1401185029Spjd 1402185029Spjd zap_leaf_t zl; 1403185029Spjd zl.l_bs = z.zap_block_shift; 1404185029Spjd 1405185029Spjd off_t off = ptrtbl[hash >> (64 - zh.zap_ptrtbl.zt_shift)] << zl.l_bs; 1406185029Spjd zap_leaf_chunk_t *zc; 1407185029Spjd 1408185029Spjd rc = dnode_read(spa, dnode, off, zap_scratch, bsize); 1409185029Spjd if (rc) 1410185029Spjd return (rc); 1411185029Spjd 1412185029Spjd zl.l_phys = (zap_leaf_phys_t *) zap_scratch; 1413185029Spjd 1414185029Spjd /* 1415185029Spjd * Make sure this chunk matches our hash. 1416185029Spjd */ 1417185029Spjd if (zl.l_phys->l_hdr.lh_prefix_len > 0 1418185029Spjd && zl.l_phys->l_hdr.lh_prefix 1419185029Spjd != hash >> (64 - zl.l_phys->l_hdr.lh_prefix_len)) 1420185029Spjd return (ENOENT); 1421185029Spjd 1422185029Spjd /* 1423185029Spjd * Hash within the chunk to find our entry. 1424185029Spjd */ 1425185029Spjd int shift = (64 - ZAP_LEAF_HASH_SHIFT(&zl) - zl.l_phys->l_hdr.lh_prefix_len); 1426185029Spjd int h = (hash >> shift) & ((1 << ZAP_LEAF_HASH_SHIFT(&zl)) - 1); 1427185029Spjd h = zl.l_phys->l_hash[h]; 1428185029Spjd if (h == 0xffff) 1429185029Spjd return (ENOENT); 1430185029Spjd zc = &ZAP_LEAF_CHUNK(&zl, h); 1431185029Spjd while (zc->l_entry.le_hash != hash) { 1432185029Spjd if (zc->l_entry.le_next == 0xffff) { 1433185029Spjd zc = 0; 1434185029Spjd break; 1435185029Spjd } 1436185029Spjd zc = &ZAP_LEAF_CHUNK(&zl, zc->l_entry.le_next); 1437185029Spjd } 1438185029Spjd if (fzap_name_equal(&zl, zc, name)) { 1439240349Savg if (zc->l_entry.le_value_intlen * zc->l_entry.le_value_numints > 8) 1440240349Savg return (E2BIG); 1441185029Spjd *value = fzap_leaf_value(&zl, zc); 1442185029Spjd return (0); 1443185029Spjd } 1444185029Spjd 1445185029Spjd return (ENOENT); 1446185029Spjd} 1447185029Spjd 1448185029Spjd/* 1449185029Spjd * Lookup a name in a zap object and return its value as a uint64_t. 1450185029Spjd */ 1451185029Spjdstatic int 1452235390Savgzap_lookup(const spa_t *spa, const dnode_phys_t *dnode, const char *name, uint64_t *value) 1453185029Spjd{ 1454185029Spjd int rc; 1455185029Spjd uint64_t zap_type; 1456219089Spjd size_t size = dnode->dn_datablkszsec << SPA_MINBLOCKSHIFT; 1457185029Spjd 1458185029Spjd rc = dnode_read(spa, dnode, 0, zap_scratch, size); 1459185029Spjd if (rc) 1460185029Spjd return (rc); 1461185029Spjd 1462185029Spjd zap_type = *(uint64_t *) zap_scratch; 1463185029Spjd if (zap_type == ZBT_MICRO) 1464235390Savg return mzap_lookup(dnode, name, value); 1465219089Spjd else if (zap_type == ZBT_HEADER) 1466185029Spjd return fzap_lookup(spa, dnode, name, value); 1467219089Spjd printf("ZFS: invalid zap_type=%d\n", (int)zap_type); 1468219089Spjd return (EIO); 1469185029Spjd} 1470185029Spjd 1471185029Spjd/* 1472185029Spjd * List a microzap directory. Assumes that the zap scratch buffer contains 1473185029Spjd * the directory contents. 1474185029Spjd */ 1475185029Spjdstatic int 1476293802Sallanjudemzap_list(const dnode_phys_t *dnode, int (*callback)(const char *)) 1477185029Spjd{ 1478185029Spjd const mzap_phys_t *mz; 1479185029Spjd const mzap_ent_phys_t *mze; 1480185029Spjd size_t size; 1481185029Spjd int chunks, i; 1482185029Spjd 1483185029Spjd /* 1484185029Spjd * Microzap objects use exactly one block. Read the whole 1485185029Spjd * thing. 1486185029Spjd */ 1487185029Spjd size = dnode->dn_datablkszsec * 512; 1488185029Spjd mz = (const mzap_phys_t *) zap_scratch; 1489185029Spjd chunks = size / MZAP_ENT_LEN - 1; 1490185029Spjd 1491185029Spjd for (i = 0; i < chunks; i++) { 1492185029Spjd mze = &mz->mz_chunk[i]; 1493185029Spjd if (mze->mze_name[0]) 1494235361Savg //printf("%-32s 0x%jx\n", mze->mze_name, (uintmax_t)mze->mze_value); 1495293802Sallanjude callback(mze->mze_name); 1496185029Spjd } 1497185029Spjd 1498185029Spjd return (0); 1499185029Spjd} 1500185029Spjd 1501185029Spjd/* 1502185029Spjd * List a fatzap directory. Assumes that the zap scratch buffer contains 1503185029Spjd * the directory header. 1504185029Spjd */ 1505185029Spjdstatic int 1506293802Sallanjudefzap_list(const spa_t *spa, const dnode_phys_t *dnode, int (*callback)(const char *)) 1507185029Spjd{ 1508185029Spjd int bsize = dnode->dn_datablkszsec << SPA_MINBLOCKSHIFT; 1509185029Spjd zap_phys_t zh = *(zap_phys_t *) zap_scratch; 1510185029Spjd fat_zap_t z; 1511185029Spjd int i, j; 1512185029Spjd 1513185029Spjd if (zh.zap_magic != ZAP_MAGIC) 1514185029Spjd return (EIO); 1515185029Spjd 1516185029Spjd z.zap_block_shift = ilog2(bsize); 1517185029Spjd z.zap_phys = (zap_phys_t *) zap_scratch; 1518185029Spjd 1519185029Spjd /* 1520185029Spjd * This assumes that the leaf blocks start at block 1. The 1521185029Spjd * documentation isn't exactly clear on this. 1522185029Spjd */ 1523185029Spjd zap_leaf_t zl; 1524185029Spjd zl.l_bs = z.zap_block_shift; 1525185029Spjd for (i = 0; i < zh.zap_num_leafs; i++) { 1526185029Spjd off_t off = (i + 1) << zl.l_bs; 1527185029Spjd char name[256], *p; 1528185029Spjd uint64_t value; 1529185029Spjd 1530185029Spjd if (dnode_read(spa, dnode, off, zap_scratch, bsize)) 1531185029Spjd return (EIO); 1532185029Spjd 1533185029Spjd zl.l_phys = (zap_leaf_phys_t *) zap_scratch; 1534185029Spjd 1535185029Spjd for (j = 0; j < ZAP_LEAF_NUMCHUNKS(&zl); j++) { 1536185029Spjd zap_leaf_chunk_t *zc, *nc; 1537185029Spjd int namelen; 1538185029Spjd 1539185029Spjd zc = &ZAP_LEAF_CHUNK(&zl, j); 1540185029Spjd if (zc->l_entry.le_type != ZAP_CHUNK_ENTRY) 1541185029Spjd continue; 1542240346Savg namelen = zc->l_entry.le_name_numints; 1543185029Spjd if (namelen > sizeof(name)) 1544185029Spjd namelen = sizeof(name); 1545235390Savg 1546185029Spjd /* 1547185029Spjd * Paste the name back together. 1548185029Spjd */ 1549185029Spjd nc = &ZAP_LEAF_CHUNK(&zl, zc->l_entry.le_name_chunk); 1550185029Spjd p = name; 1551185029Spjd while (namelen > 0) { 1552185029Spjd int len; 1553185029Spjd len = namelen; 1554185029Spjd if (len > ZAP_LEAF_ARRAY_BYTES) 1555185029Spjd len = ZAP_LEAF_ARRAY_BYTES; 1556185029Spjd memcpy(p, nc->l_array.la_array, len); 1557185029Spjd p += len; 1558185029Spjd namelen -= len; 1559185029Spjd nc = &ZAP_LEAF_CHUNK(&zl, nc->l_array.la_next); 1560185029Spjd } 1561185029Spjd 1562185029Spjd /* 1563185029Spjd * Assume the first eight bytes of the value are 1564185029Spjd * a uint64_t. 1565185029Spjd */ 1566185029Spjd value = fzap_leaf_value(&zl, zc); 1567185029Spjd 1568240348Savg //printf("%s 0x%jx\n", name, (uintmax_t)value); 1569293802Sallanjude callback((const char *)name); 1570185029Spjd } 1571185029Spjd } 1572185029Spjd 1573185029Spjd return (0); 1574185029Spjd} 1575185029Spjd 1576293802Sallanjudestatic int zfs_printf(const char *name) 1577293802Sallanjude{ 1578293802Sallanjude 1579293802Sallanjude printf("%s\n", name); 1580293802Sallanjude 1581293802Sallanjude return (0); 1582293802Sallanjude} 1583293802Sallanjude 1584185029Spjd/* 1585185029Spjd * List a zap directory. 1586185029Spjd */ 1587185029Spjdstatic int 1588235390Savgzap_list(const spa_t *spa, const dnode_phys_t *dnode) 1589185029Spjd{ 1590185029Spjd uint64_t zap_type; 1591185029Spjd size_t size = dnode->dn_datablkszsec * 512; 1592185029Spjd 1593185029Spjd if (dnode_read(spa, dnode, 0, zap_scratch, size)) 1594185029Spjd return (EIO); 1595185029Spjd 1596185029Spjd zap_type = *(uint64_t *) zap_scratch; 1597185029Spjd if (zap_type == ZBT_MICRO) 1598293802Sallanjude return mzap_list(dnode, zfs_printf); 1599185029Spjd else 1600293802Sallanjude return fzap_list(spa, dnode, zfs_printf); 1601185029Spjd} 1602185029Spjd 1603185029Spjdstatic int 1604235390Savgobjset_get_dnode(const spa_t *spa, const objset_phys_t *os, uint64_t objnum, dnode_phys_t *dnode) 1605185029Spjd{ 1606185029Spjd off_t offset; 1607185029Spjd 1608185029Spjd offset = objnum * sizeof(dnode_phys_t); 1609185029Spjd return dnode_read(spa, &os->os_meta_dnode, offset, 1610185029Spjd dnode, sizeof(dnode_phys_t)); 1611185029Spjd} 1612185029Spjd 1613235329Savgstatic int 1614235390Savgmzap_rlookup(const spa_t *spa, const dnode_phys_t *dnode, char *name, uint64_t value) 1615235329Savg{ 1616235329Savg const mzap_phys_t *mz; 1617235329Savg const mzap_ent_phys_t *mze; 1618235329Savg size_t size; 1619235329Savg int chunks, i; 1620235329Savg 1621235329Savg /* 1622235329Savg * Microzap objects use exactly one block. Read the whole 1623235329Savg * thing. 1624235329Savg */ 1625235329Savg size = dnode->dn_datablkszsec * 512; 1626235329Savg 1627235329Savg mz = (const mzap_phys_t *) zap_scratch; 1628235329Savg chunks = size / MZAP_ENT_LEN - 1; 1629235329Savg 1630235329Savg for (i = 0; i < chunks; i++) { 1631235329Savg mze = &mz->mz_chunk[i]; 1632235329Savg if (value == mze->mze_value) { 1633235329Savg strcpy(name, mze->mze_name); 1634235329Savg return (0); 1635235329Savg } 1636235329Savg } 1637235329Savg 1638235329Savg return (ENOENT); 1639235329Savg} 1640235329Savg 1641235329Savgstatic void 1642235329Savgfzap_name_copy(const zap_leaf_t *zl, const zap_leaf_chunk_t *zc, char *name) 1643235329Savg{ 1644235329Savg size_t namelen; 1645235329Savg const zap_leaf_chunk_t *nc; 1646235329Savg char *p; 1647235329Savg 1648240346Savg namelen = zc->l_entry.le_name_numints; 1649235329Savg 1650235329Savg nc = &ZAP_LEAF_CHUNK(zl, zc->l_entry.le_name_chunk); 1651235329Savg p = name; 1652235329Savg while (namelen > 0) { 1653235329Savg size_t len; 1654235329Savg len = namelen; 1655235329Savg if (len > ZAP_LEAF_ARRAY_BYTES) 1656235329Savg len = ZAP_LEAF_ARRAY_BYTES; 1657235329Savg memcpy(p, nc->l_array.la_array, len); 1658235329Savg p += len; 1659235329Savg namelen -= len; 1660235329Savg nc = &ZAP_LEAF_CHUNK(zl, nc->l_array.la_next); 1661235329Savg } 1662235329Savg 1663235329Savg *p = '\0'; 1664235329Savg} 1665235329Savg 1666235329Savgstatic int 1667235390Savgfzap_rlookup(const spa_t *spa, const dnode_phys_t *dnode, char *name, uint64_t value) 1668235329Savg{ 1669235329Savg int bsize = dnode->dn_datablkszsec << SPA_MINBLOCKSHIFT; 1670235329Savg zap_phys_t zh = *(zap_phys_t *) zap_scratch; 1671235329Savg fat_zap_t z; 1672240347Savg int i, j; 1673235329Savg 1674235329Savg if (zh.zap_magic != ZAP_MAGIC) 1675235329Savg return (EIO); 1676235329Savg 1677235329Savg z.zap_block_shift = ilog2(bsize); 1678235329Savg z.zap_phys = (zap_phys_t *) zap_scratch; 1679235329Savg 1680235329Savg /* 1681240347Savg * This assumes that the leaf blocks start at block 1. The 1682240347Savg * documentation isn't exactly clear on this. 1683235329Savg */ 1684235329Savg zap_leaf_t zl; 1685235329Savg zl.l_bs = z.zap_block_shift; 1686240347Savg for (i = 0; i < zh.zap_num_leafs; i++) { 1687240347Savg off_t off = (i + 1) << zl.l_bs; 1688235329Savg 1689240347Savg if (dnode_read(spa, dnode, off, zap_scratch, bsize)) 1690240347Savg return (EIO); 1691235329Savg 1692240347Savg zl.l_phys = (zap_leaf_phys_t *) zap_scratch; 1693235329Savg 1694240347Savg for (j = 0; j < ZAP_LEAF_NUMCHUNKS(&zl); j++) { 1695240347Savg zap_leaf_chunk_t *zc; 1696235329Savg 1697240347Savg zc = &ZAP_LEAF_CHUNK(&zl, j); 1698240347Savg if (zc->l_entry.le_type != ZAP_CHUNK_ENTRY) 1699240347Savg continue; 1700240347Savg if (zc->l_entry.le_value_intlen != 8 || 1701240347Savg zc->l_entry.le_value_numints != 1) 1702240347Savg continue; 1703235329Savg 1704240347Savg if (fzap_leaf_value(&zl, zc) == value) { 1705240347Savg fzap_name_copy(&zl, zc, name); 1706240347Savg return (0); 1707240347Savg } 1708235329Savg } 1709235329Savg } 1710235329Savg 1711235329Savg return (ENOENT); 1712235329Savg} 1713235329Savg 1714235329Savgstatic int 1715235390Savgzap_rlookup(const spa_t *spa, const dnode_phys_t *dnode, char *name, uint64_t value) 1716235329Savg{ 1717235329Savg int rc; 1718235329Savg uint64_t zap_type; 1719235329Savg size_t size = dnode->dn_datablkszsec * 512; 1720235329Savg 1721235329Savg rc = dnode_read(spa, dnode, 0, zap_scratch, size); 1722235329Savg if (rc) 1723235329Savg return (rc); 1724235329Savg 1725235329Savg zap_type = *(uint64_t *) zap_scratch; 1726235329Savg if (zap_type == ZBT_MICRO) 1727235329Savg return mzap_rlookup(spa, dnode, name, value); 1728235329Savg else 1729235329Savg return fzap_rlookup(spa, dnode, name, value); 1730235329Savg} 1731235329Savg 1732235329Savgstatic int 1733235390Savgzfs_rlookup(const spa_t *spa, uint64_t objnum, char *result) 1734235329Savg{ 1735235329Savg char name[256]; 1736235329Savg char component[256]; 1737235329Savg uint64_t dir_obj, parent_obj, child_dir_zapobj; 1738235329Savg dnode_phys_t child_dir_zap, dataset, dir, parent; 1739235329Savg dsl_dir_phys_t *dd; 1740235329Savg dsl_dataset_phys_t *ds; 1741235329Savg char *p; 1742235329Savg int len; 1743235329Savg 1744235329Savg p = &name[sizeof(name) - 1]; 1745235329Savg *p = '\0'; 1746235329Savg 1747235329Savg if (objset_get_dnode(spa, &spa->spa_mos, objnum, &dataset)) { 1748235361Savg printf("ZFS: can't find dataset %ju\n", (uintmax_t)objnum); 1749235329Savg return (EIO); 1750235329Savg } 1751235329Savg ds = (dsl_dataset_phys_t *)&dataset.dn_bonus; 1752235329Savg dir_obj = ds->ds_dir_obj; 1753235329Savg 1754235329Savg for (;;) { 1755235329Savg if (objset_get_dnode(spa, &spa->spa_mos, dir_obj, &dir) != 0) 1756235329Savg return (EIO); 1757235329Savg dd = (dsl_dir_phys_t *)&dir.dn_bonus; 1758235329Savg 1759235329Savg /* Actual loop condition. */ 1760235329Savg parent_obj = dd->dd_parent_obj; 1761235329Savg if (parent_obj == 0) 1762235329Savg break; 1763235329Savg 1764235329Savg if (objset_get_dnode(spa, &spa->spa_mos, parent_obj, &parent) != 0) 1765235329Savg return (EIO); 1766235329Savg dd = (dsl_dir_phys_t *)&parent.dn_bonus; 1767235329Savg child_dir_zapobj = dd->dd_child_dir_zapobj; 1768235329Savg if (objset_get_dnode(spa, &spa->spa_mos, child_dir_zapobj, &child_dir_zap) != 0) 1769235329Savg return (EIO); 1770235329Savg if (zap_rlookup(spa, &child_dir_zap, component, dir_obj) != 0) 1771235329Savg return (EIO); 1772235329Savg 1773235329Savg len = strlen(component); 1774235329Savg p -= len; 1775235329Savg memcpy(p, component, len); 1776235329Savg --p; 1777235329Savg *p = '/'; 1778235329Savg 1779235329Savg /* Actual loop iteration. */ 1780235329Savg dir_obj = parent_obj; 1781235329Savg } 1782235329Savg 1783235329Savg if (*p != '\0') 1784235329Savg ++p; 1785235329Savg strcpy(result, p); 1786235329Savg 1787235329Savg return (0); 1788235329Savg} 1789235329Savg 1790235329Savgstatic int 1791235390Savgzfs_lookup_dataset(const spa_t *spa, const char *name, uint64_t *objnum) 1792235329Savg{ 1793235329Savg char element[256]; 1794235329Savg uint64_t dir_obj, child_dir_zapobj; 1795235329Savg dnode_phys_t child_dir_zap, dir; 1796235329Savg dsl_dir_phys_t *dd; 1797235329Savg const char *p, *q; 1798235329Savg 1799235329Savg if (objset_get_dnode(spa, &spa->spa_mos, DMU_POOL_DIRECTORY_OBJECT, &dir)) 1800235329Savg return (EIO); 1801235329Savg if (zap_lookup(spa, &dir, DMU_POOL_ROOT_DATASET, &dir_obj)) 1802235329Savg return (EIO); 1803235329Savg 1804235329Savg p = name; 1805235329Savg for (;;) { 1806235329Savg if (objset_get_dnode(spa, &spa->spa_mos, dir_obj, &dir)) 1807235329Savg return (EIO); 1808235329Savg dd = (dsl_dir_phys_t *)&dir.dn_bonus; 1809235329Savg 1810235329Savg while (*p == '/') 1811235329Savg p++; 1812235329Savg /* Actual loop condition #1. */ 1813235329Savg if (*p == '\0') 1814235329Savg break; 1815235329Savg 1816235329Savg q = strchr(p, '/'); 1817235329Savg if (q) { 1818235329Savg memcpy(element, p, q - p); 1819235329Savg element[q - p] = '\0'; 1820235329Savg p = q + 1; 1821235329Savg } else { 1822235329Savg strcpy(element, p); 1823235329Savg p += strlen(p); 1824235329Savg } 1825235329Savg 1826235329Savg child_dir_zapobj = dd->dd_child_dir_zapobj; 1827235329Savg if (objset_get_dnode(spa, &spa->spa_mos, child_dir_zapobj, &child_dir_zap) != 0) 1828235329Savg return (EIO); 1829235329Savg 1830235329Savg /* Actual loop condition #2. */ 1831235329Savg if (zap_lookup(spa, &child_dir_zap, element, &dir_obj) != 0) 1832235329Savg return (ENOENT); 1833235329Savg } 1834235329Savg 1835235329Savg *objnum = dd->dd_head_dataset_obj; 1836235329Savg return (0); 1837235329Savg} 1838235329Savg 1839241283Savg#ifndef BOOT2 1840241283Savgstatic int 1841241283Savgzfs_list_dataset(const spa_t *spa, uint64_t objnum/*, int pos, char *entry*/) 1842241283Savg{ 1843241283Savg uint64_t dir_obj, child_dir_zapobj; 1844241283Savg dnode_phys_t child_dir_zap, dir, dataset; 1845241283Savg dsl_dataset_phys_t *ds; 1846241283Savg dsl_dir_phys_t *dd; 1847241283Savg 1848241283Savg if (objset_get_dnode(spa, &spa->spa_mos, objnum, &dataset)) { 1849241283Savg printf("ZFS: can't find dataset %ju\n", (uintmax_t)objnum); 1850241283Savg return (EIO); 1851241283Savg } 1852241283Savg ds = (dsl_dataset_phys_t *) &dataset.dn_bonus; 1853241283Savg dir_obj = ds->ds_dir_obj; 1854241283Savg 1855241283Savg if (objset_get_dnode(spa, &spa->spa_mos, dir_obj, &dir)) { 1856241283Savg printf("ZFS: can't find dirobj %ju\n", (uintmax_t)dir_obj); 1857241283Savg return (EIO); 1858241283Savg } 1859241283Savg dd = (dsl_dir_phys_t *)&dir.dn_bonus; 1860241283Savg 1861241283Savg child_dir_zapobj = dd->dd_child_dir_zapobj; 1862241283Savg if (objset_get_dnode(spa, &spa->spa_mos, child_dir_zapobj, &child_dir_zap) != 0) { 1863241283Savg printf("ZFS: can't find child zap %ju\n", (uintmax_t)dir_obj); 1864241283Savg return (EIO); 1865241283Savg } 1866241283Savg 1867241283Savg return (zap_list(spa, &child_dir_zap) != 0); 1868241283Savg} 1869293802Sallanjude 1870293802Sallanjudeint 1871293802Sallanjudezfs_callback_dataset(const spa_t *spa, uint64_t objnum, int (*callback)(const char *name)) 1872293802Sallanjude{ 1873293802Sallanjude uint64_t dir_obj, child_dir_zapobj, zap_type; 1874293802Sallanjude dnode_phys_t child_dir_zap, dir, dataset; 1875293802Sallanjude dsl_dataset_phys_t *ds; 1876293802Sallanjude dsl_dir_phys_t *dd; 1877293802Sallanjude int err; 1878293802Sallanjude 1879293802Sallanjude err = objset_get_dnode(spa, &spa->spa_mos, objnum, &dataset); 1880293802Sallanjude if (err != 0) { 1881293802Sallanjude printf("ZFS: can't find dataset %ju\n", (uintmax_t)objnum); 1882293802Sallanjude return (err); 1883293802Sallanjude } 1884293802Sallanjude ds = (dsl_dataset_phys_t *) &dataset.dn_bonus; 1885293802Sallanjude dir_obj = ds->ds_dir_obj; 1886293802Sallanjude 1887293802Sallanjude err = objset_get_dnode(spa, &spa->spa_mos, dir_obj, &dir); 1888293802Sallanjude if (err != 0) { 1889293802Sallanjude printf("ZFS: can't find dirobj %ju\n", (uintmax_t)dir_obj); 1890293802Sallanjude return (err); 1891293802Sallanjude } 1892293802Sallanjude dd = (dsl_dir_phys_t *)&dir.dn_bonus; 1893293802Sallanjude 1894293802Sallanjude child_dir_zapobj = dd->dd_child_dir_zapobj; 1895293802Sallanjude err = objset_get_dnode(spa, &spa->spa_mos, child_dir_zapobj, &child_dir_zap); 1896293802Sallanjude if (err != 0) { 1897293802Sallanjude printf("ZFS: can't find child zap %ju\n", (uintmax_t)dir_obj); 1898293802Sallanjude return (err); 1899293802Sallanjude } 1900293802Sallanjude 1901293802Sallanjude err = dnode_read(spa, &child_dir_zap, 0, zap_scratch, child_dir_zap.dn_datablkszsec * 512); 1902293802Sallanjude if (err != 0) 1903293802Sallanjude return (err); 1904293802Sallanjude 1905293802Sallanjude zap_type = *(uint64_t *) zap_scratch; 1906293802Sallanjude if (zap_type == ZBT_MICRO) 1907293802Sallanjude return mzap_list(&child_dir_zap, callback); 1908293802Sallanjude else 1909293802Sallanjude return fzap_list(spa, &child_dir_zap, callback); 1910293802Sallanjude} 1911241283Savg#endif 1912241283Savg 1913185029Spjd/* 1914185029Spjd * Find the object set given the object number of its dataset object 1915185029Spjd * and return its details in *objset 1916185029Spjd */ 1917185029Spjdstatic int 1918235390Savgzfs_mount_dataset(const spa_t *spa, uint64_t objnum, objset_phys_t *objset) 1919185029Spjd{ 1920185029Spjd dnode_phys_t dataset; 1921185029Spjd dsl_dataset_phys_t *ds; 1922185029Spjd 1923185029Spjd if (objset_get_dnode(spa, &spa->spa_mos, objnum, &dataset)) { 1924235361Savg printf("ZFS: can't find dataset %ju\n", (uintmax_t)objnum); 1925185029Spjd return (EIO); 1926185029Spjd } 1927185029Spjd 1928185029Spjd ds = (dsl_dataset_phys_t *) &dataset.dn_bonus; 1929185029Spjd if (zio_read(spa, &ds->ds_bp, objset)) { 1930235361Savg printf("ZFS: can't read object set for dataset %ju\n", 1931235361Savg (uintmax_t)objnum); 1932185029Spjd return (EIO); 1933185029Spjd } 1934185029Spjd 1935185029Spjd return (0); 1936185029Spjd} 1937185029Spjd 1938185029Spjd/* 1939185029Spjd * Find the object set pointed to by the BOOTFS property or the root 1940185029Spjd * dataset if there is none and return its details in *objset 1941185029Spjd */ 1942185029Spjdstatic int 1943235390Savgzfs_get_root(const spa_t *spa, uint64_t *objid) 1944185029Spjd{ 1945185029Spjd dnode_phys_t dir, propdir; 1946185029Spjd uint64_t props, bootfs, root; 1947185029Spjd 1948235329Savg *objid = 0; 1949235329Savg 1950185029Spjd /* 1951185029Spjd * Start with the MOS directory object. 1952185029Spjd */ 1953185029Spjd if (objset_get_dnode(spa, &spa->spa_mos, DMU_POOL_DIRECTORY_OBJECT, &dir)) { 1954185029Spjd printf("ZFS: can't read MOS object directory\n"); 1955185029Spjd return (EIO); 1956185029Spjd } 1957185029Spjd 1958185029Spjd /* 1959185029Spjd * Lookup the pool_props and see if we can find a bootfs. 1960185029Spjd */ 1961185029Spjd if (zap_lookup(spa, &dir, DMU_POOL_PROPS, &props) == 0 1962185029Spjd && objset_get_dnode(spa, &spa->spa_mos, props, &propdir) == 0 1963198420Srnoland && zap_lookup(spa, &propdir, "bootfs", &bootfs) == 0 1964198420Srnoland && bootfs != 0) 1965235329Savg { 1966235329Savg *objid = bootfs; 1967235329Savg return (0); 1968235329Savg } 1969185029Spjd /* 1970185029Spjd * Lookup the root dataset directory 1971185029Spjd */ 1972185029Spjd if (zap_lookup(spa, &dir, DMU_POOL_ROOT_DATASET, &root) 1973185029Spjd || objset_get_dnode(spa, &spa->spa_mos, root, &dir)) { 1974185029Spjd printf("ZFS: can't find root dsl_dir\n"); 1975185029Spjd return (EIO); 1976185029Spjd } 1977185029Spjd 1978185029Spjd /* 1979185029Spjd * Use the information from the dataset directory's bonus buffer 1980185029Spjd * to find the dataset object and from that the object set itself. 1981185029Spjd */ 1982185029Spjd dsl_dir_phys_t *dd = (dsl_dir_phys_t *) &dir.dn_bonus; 1983235329Savg *objid = dd->dd_head_dataset_obj; 1984235329Savg return (0); 1985185029Spjd} 1986185029Spjd 1987185029Spjdstatic int 1988235390Savgzfs_mount(const spa_t *spa, uint64_t rootobj, struct zfsmount *mount) 1989185029Spjd{ 1990219089Spjd 1991235329Savg mount->spa = spa; 1992235329Savg 1993185029Spjd /* 1994235329Savg * Find the root object set if not explicitly provided 1995185029Spjd */ 1996235329Savg if (rootobj == 0 && zfs_get_root(spa, &rootobj)) { 1997235329Savg printf("ZFS: can't find root filesystem\n"); 1998185029Spjd return (EIO); 1999185029Spjd } 2000185029Spjd 2001235329Savg if (zfs_mount_dataset(spa, rootobj, &mount->objset)) { 2002235329Savg printf("ZFS: can't open root filesystem\n"); 2003185029Spjd return (EIO); 2004185029Spjd } 2005185029Spjd 2006235329Savg mount->rootobj = rootobj; 2007235329Savg 2008185029Spjd return (0); 2009185029Spjd} 2010185029Spjd 2011219089Spjdstatic int 2012235329Savgzfs_spa_init(spa_t *spa) 2013235329Savg{ 2014235329Savg 2015235329Savg if (zio_read(spa, &spa->spa_uberblock.ub_rootbp, &spa->spa_mos)) { 2016235329Savg printf("ZFS: can't read MOS of pool %s\n", spa->spa_name); 2017235329Savg return (EIO); 2018235329Savg } 2019241289Savg if (spa->spa_mos.os_type != DMU_OST_META) { 2020241289Savg printf("ZFS: corrupted MOS of pool %s\n", spa->spa_name); 2021241289Savg return (EIO); 2022241289Savg } 2023235329Savg return (0); 2024235329Savg} 2025235329Savg 2026235329Savgstatic int 2027235390Savgzfs_dnode_stat(const spa_t *spa, dnode_phys_t *dn, struct stat *sb) 2028219089Spjd{ 2029219089Spjd 2030219089Spjd if (dn->dn_bonustype != DMU_OT_SA) { 2031219089Spjd znode_phys_t *zp = (znode_phys_t *)dn->dn_bonus; 2032219089Spjd 2033219089Spjd sb->st_mode = zp->zp_mode; 2034219089Spjd sb->st_uid = zp->zp_uid; 2035219089Spjd sb->st_gid = zp->zp_gid; 2036219089Spjd sb->st_size = zp->zp_size; 2037219089Spjd } else { 2038219089Spjd sa_hdr_phys_t *sahdrp; 2039219089Spjd int hdrsize; 2040219089Spjd size_t size = 0; 2041219089Spjd void *buf = NULL; 2042219089Spjd 2043219089Spjd if (dn->dn_bonuslen != 0) 2044219089Spjd sahdrp = (sa_hdr_phys_t *)DN_BONUS(dn); 2045219089Spjd else { 2046219089Spjd if ((dn->dn_flags & DNODE_FLAG_SPILL_BLKPTR) != 0) { 2047219089Spjd blkptr_t *bp = &dn->dn_spill; 2048219089Spjd int error; 2049219089Spjd 2050219089Spjd size = BP_GET_LSIZE(bp); 2051219089Spjd buf = zfs_alloc(size); 2052219089Spjd error = zio_read(spa, bp, buf); 2053219089Spjd if (error != 0) { 2054219089Spjd zfs_free(buf, size); 2055219089Spjd return (error); 2056219089Spjd } 2057219089Spjd sahdrp = buf; 2058219089Spjd } else { 2059219089Spjd return (EIO); 2060219089Spjd } 2061219089Spjd } 2062219089Spjd hdrsize = SA_HDR_SIZE(sahdrp); 2063219089Spjd sb->st_mode = *(uint64_t *)((char *)sahdrp + hdrsize + 2064219089Spjd SA_MODE_OFFSET); 2065219089Spjd sb->st_uid = *(uint64_t *)((char *)sahdrp + hdrsize + 2066219089Spjd SA_UID_OFFSET); 2067219089Spjd sb->st_gid = *(uint64_t *)((char *)sahdrp + hdrsize + 2068219089Spjd SA_GID_OFFSET); 2069219089Spjd sb->st_size = *(uint64_t *)((char *)sahdrp + hdrsize + 2070219089Spjd SA_SIZE_OFFSET); 2071219089Spjd if (buf != NULL) 2072219089Spjd zfs_free(buf, size); 2073219089Spjd } 2074219089Spjd 2075219089Spjd return (0); 2076219089Spjd} 2077219089Spjd 2078185029Spjd/* 2079185029Spjd * Lookup a file and return its dnode. 2080185029Spjd */ 2081185029Spjdstatic int 2082235329Savgzfs_lookup(const struct zfsmount *mount, const char *upath, dnode_phys_t *dnode) 2083185029Spjd{ 2084185029Spjd int rc; 2085185029Spjd uint64_t objnum, rootnum, parentnum; 2086235390Savg const spa_t *spa; 2087185029Spjd dnode_phys_t dn; 2088185029Spjd const char *p, *q; 2089185029Spjd char element[256]; 2090185029Spjd char path[1024]; 2091185029Spjd int symlinks_followed = 0; 2092219089Spjd struct stat sb; 2093185029Spjd 2094235329Savg spa = mount->spa; 2095235329Savg if (mount->objset.os_type != DMU_OST_ZFS) { 2096235361Savg printf("ZFS: unexpected object set type %ju\n", 2097235361Savg (uintmax_t)mount->objset.os_type); 2098185029Spjd return (EIO); 2099185029Spjd } 2100185029Spjd 2101185029Spjd /* 2102185029Spjd * Get the root directory dnode. 2103185029Spjd */ 2104235329Savg rc = objset_get_dnode(spa, &mount->objset, MASTER_NODE_OBJ, &dn); 2105185029Spjd if (rc) 2106185029Spjd return (rc); 2107185029Spjd 2108185029Spjd rc = zap_lookup(spa, &dn, ZFS_ROOT_OBJ, &rootnum); 2109185029Spjd if (rc) 2110185029Spjd return (rc); 2111185029Spjd 2112235329Savg rc = objset_get_dnode(spa, &mount->objset, rootnum, &dn); 2113185029Spjd if (rc) 2114185029Spjd return (rc); 2115185029Spjd 2116185029Spjd objnum = rootnum; 2117185029Spjd p = upath; 2118185029Spjd while (p && *p) { 2119185029Spjd while (*p == '/') 2120185029Spjd p++; 2121185029Spjd if (!*p) 2122185029Spjd break; 2123185029Spjd q = strchr(p, '/'); 2124185029Spjd if (q) { 2125185029Spjd memcpy(element, p, q - p); 2126185029Spjd element[q - p] = 0; 2127185029Spjd p = q; 2128185029Spjd } else { 2129185029Spjd strcpy(element, p); 2130185029Spjd p = 0; 2131185029Spjd } 2132185029Spjd 2133219089Spjd rc = zfs_dnode_stat(spa, &dn, &sb); 2134219089Spjd if (rc) 2135219089Spjd return (rc); 2136219089Spjd if (!S_ISDIR(sb.st_mode)) 2137185029Spjd return (ENOTDIR); 2138185029Spjd 2139185029Spjd parentnum = objnum; 2140185029Spjd rc = zap_lookup(spa, &dn, element, &objnum); 2141185029Spjd if (rc) 2142185029Spjd return (rc); 2143185029Spjd objnum = ZFS_DIRENT_OBJ(objnum); 2144185029Spjd 2145235329Savg rc = objset_get_dnode(spa, &mount->objset, objnum, &dn); 2146185029Spjd if (rc) 2147185029Spjd return (rc); 2148185029Spjd 2149185029Spjd /* 2150185029Spjd * Check for symlink. 2151185029Spjd */ 2152219089Spjd rc = zfs_dnode_stat(spa, &dn, &sb); 2153219089Spjd if (rc) 2154219089Spjd return (rc); 2155219089Spjd if (S_ISLNK(sb.st_mode)) { 2156185029Spjd if (symlinks_followed > 10) 2157185029Spjd return (EMLINK); 2158185029Spjd symlinks_followed++; 2159185029Spjd 2160185029Spjd /* 2161185029Spjd * Read the link value and copy the tail of our 2162185029Spjd * current path onto the end. 2163185029Spjd */ 2164185029Spjd if (p) 2165219089Spjd strcpy(&path[sb.st_size], p); 2166185029Spjd else 2167219089Spjd path[sb.st_size] = 0; 2168294975Ssmh /* 2169294975Ssmh * Second test is purely to silence bogus compiler 2170294975Ssmh * warning about accessing past the end of dn_bonus. 2171294975Ssmh */ 2172294975Ssmh if (sb.st_size + sizeof(znode_phys_t) <= 2173294975Ssmh dn.dn_bonuslen && sizeof(znode_phys_t) <= 2174294975Ssmh sizeof(dn.dn_bonus)) { 2175185029Spjd memcpy(path, &dn.dn_bonus[sizeof(znode_phys_t)], 2176219089Spjd sb.st_size); 2177185029Spjd } else { 2178219089Spjd rc = dnode_read(spa, &dn, 0, path, sb.st_size); 2179185029Spjd if (rc) 2180185029Spjd return (rc); 2181185029Spjd } 2182185029Spjd 2183185029Spjd /* 2184185029Spjd * Restart with the new path, starting either at 2185185029Spjd * the root or at the parent depending whether or 2186185029Spjd * not the link is relative. 2187185029Spjd */ 2188185029Spjd p = path; 2189185029Spjd if (*p == '/') 2190185029Spjd objnum = rootnum; 2191185029Spjd else 2192185029Spjd objnum = parentnum; 2193235329Savg objset_get_dnode(spa, &mount->objset, objnum, &dn); 2194185029Spjd } 2195185029Spjd } 2196185029Spjd 2197185029Spjd *dnode = dn; 2198185029Spjd return (0); 2199185029Spjd} 2200