sa.c revision 288549
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 24 * Portions Copyright 2011 iXsystems, Inc 25 * Copyright (c) 2013 by Delphix. All rights reserved. 26 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 27 */ 28 29#include <sys/zfs_context.h> 30#include <sys/types.h> 31#include <sys/param.h> 32#include <sys/systm.h> 33#include <sys/sysmacros.h> 34#include <sys/dmu.h> 35#include <sys/dmu_impl.h> 36#include <sys/dmu_objset.h> 37#include <sys/dbuf.h> 38#include <sys/dnode.h> 39#include <sys/zap.h> 40#include <sys/sa.h> 41#include <sys/sunddi.h> 42#include <sys/sa_impl.h> 43#include <sys/dnode.h> 44#include <sys/errno.h> 45#include <sys/zfs_context.h> 46 47/* 48 * ZFS System attributes: 49 * 50 * A generic mechanism to allow for arbitrary attributes 51 * to be stored in a dnode. The data will be stored in the bonus buffer of 52 * the dnode and if necessary a special "spill" block will be used to handle 53 * overflow situations. The spill block will be sized to fit the data 54 * from 512 - 128K. When a spill block is used the BP (blkptr_t) for the 55 * spill block is stored at the end of the current bonus buffer. Any 56 * attributes that would be in the way of the blkptr_t will be relocated 57 * into the spill block. 58 * 59 * Attribute registration: 60 * 61 * Stored persistently on a per dataset basis 62 * a mapping between attribute "string" names and their actual attribute 63 * numeric values, length, and byteswap function. The names are only used 64 * during registration. All attributes are known by their unique attribute 65 * id value. If an attribute can have a variable size then the value 66 * 0 will be used to indicate this. 67 * 68 * Attribute Layout: 69 * 70 * Attribute layouts are a way to compactly store multiple attributes, but 71 * without taking the overhead associated with managing each attribute 72 * individually. Since you will typically have the same set of attributes 73 * stored in the same order a single table will be used to represent that 74 * layout. The ZPL for example will usually have only about 10 different 75 * layouts (regular files, device files, symlinks, 76 * regular files + scanstamp, files/dir with extended attributes, and then 77 * you have the possibility of all of those minus ACL, because it would 78 * be kicked out into the spill block) 79 * 80 * Layouts are simply an array of the attributes and their 81 * ordering i.e. [0, 1, 4, 5, 2] 82 * 83 * Each distinct layout is given a unique layout number and that is whats 84 * stored in the header at the beginning of the SA data buffer. 85 * 86 * A layout only covers a single dbuf (bonus or spill). If a set of 87 * attributes is split up between the bonus buffer and a spill buffer then 88 * two different layouts will be used. This allows us to byteswap the 89 * spill without looking at the bonus buffer and keeps the on disk format of 90 * the bonus and spill buffer the same. 91 * 92 * Adding a single attribute will cause the entire set of attributes to 93 * be rewritten and could result in a new layout number being constructed 94 * as part of the rewrite if no such layout exists for the new set of 95 * attribues. The new attribute will be appended to the end of the already 96 * existing attributes. 97 * 98 * Both the attribute registration and attribute layout information are 99 * stored in normal ZAP attributes. Their should be a small number of 100 * known layouts and the set of attributes is assumed to typically be quite 101 * small. 102 * 103 * The registered attributes and layout "table" information is maintained 104 * in core and a special "sa_os_t" is attached to the objset_t. 105 * 106 * A special interface is provided to allow for quickly applying 107 * a large set of attributes at once. sa_replace_all_by_template() is 108 * used to set an array of attributes. This is used by the ZPL when 109 * creating a brand new file. The template that is passed into the function 110 * specifies the attribute, size for variable length attributes, location of 111 * data and special "data locator" function if the data isn't in a contiguous 112 * location. 113 * 114 * Byteswap implications: 115 * 116 * Since the SA attributes are not entirely self describing we can't do 117 * the normal byteswap processing. The special ZAP layout attribute and 118 * attribute registration attributes define the byteswap function and the 119 * size of the attributes, unless it is variable sized. 120 * The normal ZFS byteswapping infrastructure assumes you don't need 121 * to read any objects in order to do the necessary byteswapping. Whereas 122 * SA attributes can only be properly byteswapped if the dataset is opened 123 * and the layout/attribute ZAP attributes are available. Because of this 124 * the SA attributes will be byteswapped when they are first accessed by 125 * the SA code that will read the SA data. 126 */ 127 128typedef void (sa_iterfunc_t)(void *hdr, void *addr, sa_attr_type_t, 129 uint16_t length, int length_idx, boolean_t, void *userp); 130 131static int sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype); 132static void sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab); 133static void *sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype, 134 void *data); 135static void sa_idx_tab_rele(objset_t *os, void *arg); 136static void sa_copy_data(sa_data_locator_t *func, void *start, void *target, 137 int buflen); 138static int sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr, 139 sa_data_op_t action, sa_data_locator_t *locator, void *datastart, 140 uint16_t buflen, dmu_tx_t *tx); 141 142arc_byteswap_func_t *sa_bswap_table[] = { 143 byteswap_uint64_array, 144 byteswap_uint32_array, 145 byteswap_uint16_array, 146 byteswap_uint8_array, 147 zfs_acl_byteswap, 148}; 149 150#define SA_COPY_DATA(f, s, t, l) \ 151 { \ 152 if (f == NULL) { \ 153 if (l == 8) { \ 154 *(uint64_t *)t = *(uint64_t *)s; \ 155 } else if (l == 16) { \ 156 *(uint64_t *)t = *(uint64_t *)s; \ 157 *(uint64_t *)((uintptr_t)t + 8) = \ 158 *(uint64_t *)((uintptr_t)s + 8); \ 159 } else { \ 160 bcopy(s, t, l); \ 161 } \ 162 } else \ 163 sa_copy_data(f, s, t, l); \ 164 } 165 166/* 167 * This table is fixed and cannot be changed. Its purpose is to 168 * allow the SA code to work with both old/new ZPL file systems. 169 * It contains the list of legacy attributes. These attributes aren't 170 * stored in the "attribute" registry zap objects, since older ZPL file systems 171 * won't have the registry. Only objsets of type ZFS_TYPE_FILESYSTEM will 172 * use this static table. 173 */ 174sa_attr_reg_t sa_legacy_attrs[] = { 175 {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0}, 176 {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1}, 177 {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2}, 178 {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3}, 179 {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4}, 180 {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5}, 181 {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6}, 182 {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7}, 183 {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8}, 184 {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9}, 185 {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10}, 186 {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11}, 187 {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12}, 188 {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13}, 189 {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14}, 190 {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15}, 191}; 192 193/* 194 * This is only used for objects of type DMU_OT_ZNODE 195 */ 196sa_attr_type_t sa_legacy_zpl_layout[] = { 197 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 198}; 199 200/* 201 * Special dummy layout used for buffers with no attributes. 202 */ 203sa_attr_type_t sa_dummy_zpl_layout[] = { 0 }; 204 205static int sa_legacy_attr_count = 16; 206static kmem_cache_t *sa_cache = NULL; 207 208/*ARGSUSED*/ 209static int 210sa_cache_constructor(void *buf, void *unused, int kmflag) 211{ 212 sa_handle_t *hdl = buf; 213 214 mutex_init(&hdl->sa_lock, NULL, MUTEX_DEFAULT, NULL); 215 return (0); 216} 217 218/*ARGSUSED*/ 219static void 220sa_cache_destructor(void *buf, void *unused) 221{ 222 sa_handle_t *hdl = buf; 223 hdl->sa_dbu.dbu_evict_func = NULL; 224 mutex_destroy(&hdl->sa_lock); 225} 226 227void 228sa_cache_init(void) 229{ 230 sa_cache = kmem_cache_create("sa_cache", 231 sizeof (sa_handle_t), 0, sa_cache_constructor, 232 sa_cache_destructor, NULL, NULL, NULL, 0); 233} 234 235void 236sa_cache_fini(void) 237{ 238 if (sa_cache) 239 kmem_cache_destroy(sa_cache); 240} 241 242static int 243layout_num_compare(const void *arg1, const void *arg2) 244{ 245 const sa_lot_t *node1 = arg1; 246 const sa_lot_t *node2 = arg2; 247 248 if (node1->lot_num > node2->lot_num) 249 return (1); 250 else if (node1->lot_num < node2->lot_num) 251 return (-1); 252 return (0); 253} 254 255static int 256layout_hash_compare(const void *arg1, const void *arg2) 257{ 258 const sa_lot_t *node1 = arg1; 259 const sa_lot_t *node2 = arg2; 260 261 if (node1->lot_hash > node2->lot_hash) 262 return (1); 263 if (node1->lot_hash < node2->lot_hash) 264 return (-1); 265 if (node1->lot_instance > node2->lot_instance) 266 return (1); 267 if (node1->lot_instance < node2->lot_instance) 268 return (-1); 269 return (0); 270} 271 272boolean_t 273sa_layout_equal(sa_lot_t *tbf, sa_attr_type_t *attrs, int count) 274{ 275 int i; 276 277 if (count != tbf->lot_attr_count) 278 return (1); 279 280 for (i = 0; i != count; i++) { 281 if (attrs[i] != tbf->lot_attrs[i]) 282 return (1); 283 } 284 return (0); 285} 286 287#define SA_ATTR_HASH(attr) (zfs_crc64_table[(-1ULL ^ attr) & 0xFF]) 288 289static uint64_t 290sa_layout_info_hash(sa_attr_type_t *attrs, int attr_count) 291{ 292 int i; 293 uint64_t crc = -1ULL; 294 295 for (i = 0; i != attr_count; i++) 296 crc ^= SA_ATTR_HASH(attrs[i]); 297 298 return (crc); 299} 300 301static int 302sa_get_spill(sa_handle_t *hdl) 303{ 304 int rc; 305 if (hdl->sa_spill == NULL) { 306 if ((rc = dmu_spill_hold_existing(hdl->sa_bonus, NULL, 307 &hdl->sa_spill)) == 0) 308 VERIFY(0 == sa_build_index(hdl, SA_SPILL)); 309 } else { 310 rc = 0; 311 } 312 313 return (rc); 314} 315 316/* 317 * Main attribute lookup/update function 318 * returns 0 for success or non zero for failures 319 * 320 * Operates on bulk array, first failure will abort further processing 321 */ 322int 323sa_attr_op(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count, 324 sa_data_op_t data_op, dmu_tx_t *tx) 325{ 326 sa_os_t *sa = hdl->sa_os->os_sa; 327 int i; 328 int error = 0; 329 sa_buf_type_t buftypes; 330 331 buftypes = 0; 332 333 ASSERT(count > 0); 334 for (i = 0; i != count; i++) { 335 ASSERT(bulk[i].sa_attr <= hdl->sa_os->os_sa->sa_num_attrs); 336 337 bulk[i].sa_addr = NULL; 338 /* First check the bonus buffer */ 339 340 if (hdl->sa_bonus_tab && TOC_ATTR_PRESENT( 341 hdl->sa_bonus_tab->sa_idx_tab[bulk[i].sa_attr])) { 342 SA_ATTR_INFO(sa, hdl->sa_bonus_tab, 343 SA_GET_HDR(hdl, SA_BONUS), 344 bulk[i].sa_attr, bulk[i], SA_BONUS, hdl); 345 if (tx && !(buftypes & SA_BONUS)) { 346 dmu_buf_will_dirty(hdl->sa_bonus, tx); 347 buftypes |= SA_BONUS; 348 } 349 } 350 if (bulk[i].sa_addr == NULL && 351 ((error = sa_get_spill(hdl)) == 0)) { 352 if (TOC_ATTR_PRESENT( 353 hdl->sa_spill_tab->sa_idx_tab[bulk[i].sa_attr])) { 354 SA_ATTR_INFO(sa, hdl->sa_spill_tab, 355 SA_GET_HDR(hdl, SA_SPILL), 356 bulk[i].sa_attr, bulk[i], SA_SPILL, hdl); 357 if (tx && !(buftypes & SA_SPILL) && 358 bulk[i].sa_size == bulk[i].sa_length) { 359 dmu_buf_will_dirty(hdl->sa_spill, tx); 360 buftypes |= SA_SPILL; 361 } 362 } 363 } 364 if (error && error != ENOENT) { 365 return ((error == ECKSUM) ? EIO : error); 366 } 367 368 switch (data_op) { 369 case SA_LOOKUP: 370 if (bulk[i].sa_addr == NULL) 371 return (SET_ERROR(ENOENT)); 372 if (bulk[i].sa_data) { 373 SA_COPY_DATA(bulk[i].sa_data_func, 374 bulk[i].sa_addr, bulk[i].sa_data, 375 bulk[i].sa_size); 376 } 377 continue; 378 379 case SA_UPDATE: 380 /* existing rewrite of attr */ 381 if (bulk[i].sa_addr && 382 bulk[i].sa_size == bulk[i].sa_length) { 383 SA_COPY_DATA(bulk[i].sa_data_func, 384 bulk[i].sa_data, bulk[i].sa_addr, 385 bulk[i].sa_length); 386 continue; 387 } else if (bulk[i].sa_addr) { /* attr size change */ 388 error = sa_modify_attrs(hdl, bulk[i].sa_attr, 389 SA_REPLACE, bulk[i].sa_data_func, 390 bulk[i].sa_data, bulk[i].sa_length, tx); 391 } else { /* adding new attribute */ 392 error = sa_modify_attrs(hdl, bulk[i].sa_attr, 393 SA_ADD, bulk[i].sa_data_func, 394 bulk[i].sa_data, bulk[i].sa_length, tx); 395 } 396 if (error) 397 return (error); 398 break; 399 } 400 } 401 return (error); 402} 403 404static sa_lot_t * 405sa_add_layout_entry(objset_t *os, sa_attr_type_t *attrs, int attr_count, 406 uint64_t lot_num, uint64_t hash, boolean_t zapadd, dmu_tx_t *tx) 407{ 408 sa_os_t *sa = os->os_sa; 409 sa_lot_t *tb, *findtb; 410 int i; 411 avl_index_t loc; 412 413 ASSERT(MUTEX_HELD(&sa->sa_lock)); 414 tb = kmem_zalloc(sizeof (sa_lot_t), KM_SLEEP); 415 tb->lot_attr_count = attr_count; 416 tb->lot_attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count, 417 KM_SLEEP); 418 bcopy(attrs, tb->lot_attrs, sizeof (sa_attr_type_t) * attr_count); 419 tb->lot_num = lot_num; 420 tb->lot_hash = hash; 421 tb->lot_instance = 0; 422 423 if (zapadd) { 424 char attr_name[8]; 425 426 if (sa->sa_layout_attr_obj == 0) { 427 sa->sa_layout_attr_obj = zap_create_link(os, 428 DMU_OT_SA_ATTR_LAYOUTS, 429 sa->sa_master_obj, SA_LAYOUTS, tx); 430 } 431 432 (void) snprintf(attr_name, sizeof (attr_name), 433 "%d", (int)lot_num); 434 VERIFY(0 == zap_update(os, os->os_sa->sa_layout_attr_obj, 435 attr_name, 2, attr_count, attrs, tx)); 436 } 437 438 list_create(&tb->lot_idx_tab, sizeof (sa_idx_tab_t), 439 offsetof(sa_idx_tab_t, sa_next)); 440 441 for (i = 0; i != attr_count; i++) { 442 if (sa->sa_attr_table[tb->lot_attrs[i]].sa_length == 0) 443 tb->lot_var_sizes++; 444 } 445 446 avl_add(&sa->sa_layout_num_tree, tb); 447 448 /* verify we don't have a hash collision */ 449 if ((findtb = avl_find(&sa->sa_layout_hash_tree, tb, &loc)) != NULL) { 450 for (; findtb && findtb->lot_hash == hash; 451 findtb = AVL_NEXT(&sa->sa_layout_hash_tree, findtb)) { 452 if (findtb->lot_instance != tb->lot_instance) 453 break; 454 tb->lot_instance++; 455 } 456 } 457 avl_add(&sa->sa_layout_hash_tree, tb); 458 return (tb); 459} 460 461static void 462sa_find_layout(objset_t *os, uint64_t hash, sa_attr_type_t *attrs, 463 int count, dmu_tx_t *tx, sa_lot_t **lot) 464{ 465 sa_lot_t *tb, tbsearch; 466 avl_index_t loc; 467 sa_os_t *sa = os->os_sa; 468 boolean_t found = B_FALSE; 469 470 mutex_enter(&sa->sa_lock); 471 tbsearch.lot_hash = hash; 472 tbsearch.lot_instance = 0; 473 tb = avl_find(&sa->sa_layout_hash_tree, &tbsearch, &loc); 474 if (tb) { 475 for (; tb && tb->lot_hash == hash; 476 tb = AVL_NEXT(&sa->sa_layout_hash_tree, tb)) { 477 if (sa_layout_equal(tb, attrs, count) == 0) { 478 found = B_TRUE; 479 break; 480 } 481 } 482 } 483 if (!found) { 484 tb = sa_add_layout_entry(os, attrs, count, 485 avl_numnodes(&sa->sa_layout_num_tree), hash, B_TRUE, tx); 486 } 487 mutex_exit(&sa->sa_lock); 488 *lot = tb; 489} 490 491static int 492sa_resize_spill(sa_handle_t *hdl, uint32_t size, dmu_tx_t *tx) 493{ 494 int error; 495 uint32_t blocksize; 496 497 if (size == 0) { 498 blocksize = SPA_MINBLOCKSIZE; 499 } else if (size > SPA_OLD_MAXBLOCKSIZE) { 500 ASSERT(0); 501 return (SET_ERROR(EFBIG)); 502 } else { 503 blocksize = P2ROUNDUP_TYPED(size, SPA_MINBLOCKSIZE, uint32_t); 504 } 505 506 error = dbuf_spill_set_blksz(hdl->sa_spill, blocksize, tx); 507 ASSERT(error == 0); 508 return (error); 509} 510 511static void 512sa_copy_data(sa_data_locator_t *func, void *datastart, void *target, int buflen) 513{ 514 if (func == NULL) { 515 bcopy(datastart, target, buflen); 516 } else { 517 boolean_t start; 518 int bytes; 519 void *dataptr; 520 void *saptr = target; 521 uint32_t length; 522 523 start = B_TRUE; 524 bytes = 0; 525 while (bytes < buflen) { 526 func(&dataptr, &length, buflen, start, datastart); 527 bcopy(dataptr, saptr, length); 528 saptr = (void *)((caddr_t)saptr + length); 529 bytes += length; 530 start = B_FALSE; 531 } 532 } 533} 534 535/* 536 * Determine several different sizes 537 * first the sa header size 538 * the number of bytes to be stored 539 * if spill would occur the index in the attribute array is returned 540 * 541 * the boolean will_spill will be set when spilling is necessary. It 542 * is only set when the buftype is SA_BONUS 543 */ 544static int 545sa_find_sizes(sa_os_t *sa, sa_bulk_attr_t *attr_desc, int attr_count, 546 dmu_buf_t *db, sa_buf_type_t buftype, int *index, int *total, 547 boolean_t *will_spill) 548{ 549 int var_size = 0; 550 int i; 551 int j = -1; 552 int full_space; 553 int hdrsize; 554 boolean_t done = B_FALSE; 555 556 if (buftype == SA_BONUS && sa->sa_force_spill) { 557 *total = 0; 558 *index = 0; 559 *will_spill = B_TRUE; 560 return (0); 561 } 562 563 *index = -1; 564 *total = 0; 565 566 if (buftype == SA_BONUS) 567 *will_spill = B_FALSE; 568 569 hdrsize = (SA_BONUSTYPE_FROM_DB(db) == DMU_OT_ZNODE) ? 0 : 570 sizeof (sa_hdr_phys_t); 571 572 full_space = (buftype == SA_BONUS) ? DN_MAX_BONUSLEN : db->db_size; 573 ASSERT(IS_P2ALIGNED(full_space, 8)); 574 575 for (i = 0; i != attr_count; i++) { 576 boolean_t is_var_sz; 577 578 *total = P2ROUNDUP(*total, 8); 579 *total += attr_desc[i].sa_length; 580 if (done) 581 goto next; 582 583 is_var_sz = (SA_REGISTERED_LEN(sa, attr_desc[i].sa_attr) == 0); 584 if (is_var_sz) { 585 var_size++; 586 } 587 588 if (is_var_sz && var_size > 1) { 589 if (P2ROUNDUP(hdrsize + sizeof (uint16_t), 8) + 590 *total < full_space) { 591 /* 592 * Account for header space used by array of 593 * optional sizes of variable-length attributes. 594 * Record the index in case this increase needs 595 * to be reversed due to spill-over. 596 */ 597 hdrsize += sizeof (uint16_t); 598 j = i; 599 } else { 600 done = B_TRUE; 601 *index = i; 602 if (buftype == SA_BONUS) 603 *will_spill = B_TRUE; 604 continue; 605 } 606 } 607 608 /* 609 * find index of where spill *could* occur. 610 * Then continue to count of remainder attribute 611 * space. The sum is used later for sizing bonus 612 * and spill buffer. 613 */ 614 if (buftype == SA_BONUS && *index == -1 && 615 (*total + P2ROUNDUP(hdrsize, 8)) > 616 (full_space - sizeof (blkptr_t))) { 617 *index = i; 618 done = B_TRUE; 619 } 620 621next: 622 if ((*total + P2ROUNDUP(hdrsize, 8)) > full_space && 623 buftype == SA_BONUS) 624 *will_spill = B_TRUE; 625 } 626 627 /* 628 * j holds the index of the last variable-sized attribute for 629 * which hdrsize was increased. Reverse the increase if that 630 * attribute will be relocated to the spill block. 631 */ 632 if (*will_spill && j == *index) 633 hdrsize -= sizeof (uint16_t); 634 635 hdrsize = P2ROUNDUP(hdrsize, 8); 636 return (hdrsize); 637} 638 639#define BUF_SPACE_NEEDED(total, header) (total + header) 640 641/* 642 * Find layout that corresponds to ordering of attributes 643 * If not found a new layout number is created and added to 644 * persistent layout tables. 645 */ 646static int 647sa_build_layouts(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, int attr_count, 648 dmu_tx_t *tx) 649{ 650 sa_os_t *sa = hdl->sa_os->os_sa; 651 uint64_t hash; 652 sa_buf_type_t buftype; 653 sa_hdr_phys_t *sahdr; 654 void *data_start; 655 int buf_space; 656 sa_attr_type_t *attrs, *attrs_start; 657 int i, lot_count; 658 int hdrsize; 659 int spillhdrsize = 0; 660 int used; 661 dmu_object_type_t bonustype; 662 sa_lot_t *lot; 663 int len_idx; 664 int spill_used; 665 boolean_t spilling; 666 667 dmu_buf_will_dirty(hdl->sa_bonus, tx); 668 bonustype = SA_BONUSTYPE_FROM_DB(hdl->sa_bonus); 669 670 /* first determine bonus header size and sum of all attributes */ 671 hdrsize = sa_find_sizes(sa, attr_desc, attr_count, hdl->sa_bonus, 672 SA_BONUS, &i, &used, &spilling); 673 674 if (used > SPA_OLD_MAXBLOCKSIZE) 675 return (SET_ERROR(EFBIG)); 676 677 VERIFY(0 == dmu_set_bonus(hdl->sa_bonus, spilling ? 678 MIN(DN_MAX_BONUSLEN - sizeof (blkptr_t), used + hdrsize) : 679 used + hdrsize, tx)); 680 681 ASSERT((bonustype == DMU_OT_ZNODE && spilling == 0) || 682 bonustype == DMU_OT_SA); 683 684 /* setup and size spill buffer when needed */ 685 if (spilling) { 686 boolean_t dummy; 687 688 if (hdl->sa_spill == NULL) { 689 VERIFY(dmu_spill_hold_by_bonus(hdl->sa_bonus, NULL, 690 &hdl->sa_spill) == 0); 691 } 692 dmu_buf_will_dirty(hdl->sa_spill, tx); 693 694 spillhdrsize = sa_find_sizes(sa, &attr_desc[i], 695 attr_count - i, hdl->sa_spill, SA_SPILL, &i, 696 &spill_used, &dummy); 697 698 if (spill_used > SPA_OLD_MAXBLOCKSIZE) 699 return (SET_ERROR(EFBIG)); 700 701 buf_space = hdl->sa_spill->db_size - spillhdrsize; 702 if (BUF_SPACE_NEEDED(spill_used, spillhdrsize) > 703 hdl->sa_spill->db_size) 704 VERIFY(0 == sa_resize_spill(hdl, 705 BUF_SPACE_NEEDED(spill_used, spillhdrsize), tx)); 706 } 707 708 /* setup starting pointers to lay down data */ 709 data_start = (void *)((uintptr_t)hdl->sa_bonus->db_data + hdrsize); 710 sahdr = (sa_hdr_phys_t *)hdl->sa_bonus->db_data; 711 buftype = SA_BONUS; 712 713 if (spilling) 714 buf_space = (sa->sa_force_spill) ? 715 0 : SA_BLKPTR_SPACE - hdrsize; 716 else 717 buf_space = hdl->sa_bonus->db_size - hdrsize; 718 719 attrs_start = attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count, 720 KM_SLEEP); 721 lot_count = 0; 722 723 for (i = 0, len_idx = 0, hash = -1ULL; i != attr_count; i++) { 724 uint16_t length; 725 726 ASSERT(IS_P2ALIGNED(data_start, 8)); 727 ASSERT(IS_P2ALIGNED(buf_space, 8)); 728 attrs[i] = attr_desc[i].sa_attr; 729 length = SA_REGISTERED_LEN(sa, attrs[i]); 730 if (length == 0) 731 length = attr_desc[i].sa_length; 732 else 733 VERIFY(length == attr_desc[i].sa_length); 734 735 if (buf_space < length) { /* switch to spill buffer */ 736 VERIFY(spilling); 737 VERIFY(bonustype == DMU_OT_SA); 738 if (buftype == SA_BONUS && !sa->sa_force_spill) { 739 sa_find_layout(hdl->sa_os, hash, attrs_start, 740 lot_count, tx, &lot); 741 SA_SET_HDR(sahdr, lot->lot_num, hdrsize); 742 } 743 744 buftype = SA_SPILL; 745 hash = -1ULL; 746 len_idx = 0; 747 748 sahdr = (sa_hdr_phys_t *)hdl->sa_spill->db_data; 749 sahdr->sa_magic = SA_MAGIC; 750 data_start = (void *)((uintptr_t)sahdr + 751 spillhdrsize); 752 attrs_start = &attrs[i]; 753 buf_space = hdl->sa_spill->db_size - spillhdrsize; 754 lot_count = 0; 755 } 756 hash ^= SA_ATTR_HASH(attrs[i]); 757 attr_desc[i].sa_addr = data_start; 758 attr_desc[i].sa_size = length; 759 SA_COPY_DATA(attr_desc[i].sa_data_func, attr_desc[i].sa_data, 760 data_start, length); 761 if (sa->sa_attr_table[attrs[i]].sa_length == 0) { 762 sahdr->sa_lengths[len_idx++] = length; 763 } 764 VERIFY((uintptr_t)data_start % 8 == 0); 765 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start + 766 length), 8); 767 buf_space -= P2ROUNDUP(length, 8); 768 lot_count++; 769 } 770 771 sa_find_layout(hdl->sa_os, hash, attrs_start, lot_count, tx, &lot); 772 773 /* 774 * Verify that old znodes always have layout number 0. 775 * Must be DMU_OT_SA for arbitrary layouts 776 */ 777 VERIFY((bonustype == DMU_OT_ZNODE && lot->lot_num == 0) || 778 (bonustype == DMU_OT_SA && lot->lot_num > 1)); 779 780 if (bonustype == DMU_OT_SA) { 781 SA_SET_HDR(sahdr, lot->lot_num, 782 buftype == SA_BONUS ? hdrsize : spillhdrsize); 783 } 784 785 kmem_free(attrs, sizeof (sa_attr_type_t) * attr_count); 786 if (hdl->sa_bonus_tab) { 787 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab); 788 hdl->sa_bonus_tab = NULL; 789 } 790 if (!sa->sa_force_spill) 791 VERIFY(0 == sa_build_index(hdl, SA_BONUS)); 792 if (hdl->sa_spill) { 793 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab); 794 if (!spilling) { 795 /* 796 * remove spill block that is no longer needed. 797 */ 798 dmu_buf_rele(hdl->sa_spill, NULL); 799 hdl->sa_spill = NULL; 800 hdl->sa_spill_tab = NULL; 801 VERIFY(0 == dmu_rm_spill(hdl->sa_os, 802 sa_handle_object(hdl), tx)); 803 } else { 804 VERIFY(0 == sa_build_index(hdl, SA_SPILL)); 805 } 806 } 807 808 return (0); 809} 810 811static void 812sa_free_attr_table(sa_os_t *sa) 813{ 814 int i; 815 816 if (sa->sa_attr_table == NULL) 817 return; 818 819 for (i = 0; i != sa->sa_num_attrs; i++) { 820 if (sa->sa_attr_table[i].sa_name) 821 kmem_free(sa->sa_attr_table[i].sa_name, 822 strlen(sa->sa_attr_table[i].sa_name) + 1); 823 } 824 825 kmem_free(sa->sa_attr_table, 826 sizeof (sa_attr_table_t) * sa->sa_num_attrs); 827 828 sa->sa_attr_table = NULL; 829} 830 831static int 832sa_attr_table_setup(objset_t *os, sa_attr_reg_t *reg_attrs, int count) 833{ 834 sa_os_t *sa = os->os_sa; 835 uint64_t sa_attr_count = 0; 836 uint64_t sa_reg_count = 0; 837 int error = 0; 838 uint64_t attr_value; 839 sa_attr_table_t *tb; 840 zap_cursor_t zc; 841 zap_attribute_t za; 842 int registered_count = 0; 843 int i; 844 dmu_objset_type_t ostype = dmu_objset_type(os); 845 846 sa->sa_user_table = 847 kmem_zalloc(count * sizeof (sa_attr_type_t), KM_SLEEP); 848 sa->sa_user_table_sz = count * sizeof (sa_attr_type_t); 849 850 if (sa->sa_reg_attr_obj != 0) { 851 error = zap_count(os, sa->sa_reg_attr_obj, 852 &sa_attr_count); 853 854 /* 855 * Make sure we retrieved a count and that it isn't zero 856 */ 857 if (error || (error == 0 && sa_attr_count == 0)) { 858 if (error == 0) 859 error = SET_ERROR(EINVAL); 860 goto bail; 861 } 862 sa_reg_count = sa_attr_count; 863 } 864 865 if (ostype == DMU_OST_ZFS && sa_attr_count == 0) 866 sa_attr_count += sa_legacy_attr_count; 867 868 /* Allocate attribute numbers for attributes that aren't registered */ 869 for (i = 0; i != count; i++) { 870 boolean_t found = B_FALSE; 871 int j; 872 873 if (ostype == DMU_OST_ZFS) { 874 for (j = 0; j != sa_legacy_attr_count; j++) { 875 if (strcmp(reg_attrs[i].sa_name, 876 sa_legacy_attrs[j].sa_name) == 0) { 877 sa->sa_user_table[i] = 878 sa_legacy_attrs[j].sa_attr; 879 found = B_TRUE; 880 } 881 } 882 } 883 if (found) 884 continue; 885 886 if (sa->sa_reg_attr_obj) 887 error = zap_lookup(os, sa->sa_reg_attr_obj, 888 reg_attrs[i].sa_name, 8, 1, &attr_value); 889 else 890 error = SET_ERROR(ENOENT); 891 switch (error) { 892 case ENOENT: 893 sa->sa_user_table[i] = (sa_attr_type_t)sa_attr_count; 894 sa_attr_count++; 895 break; 896 case 0: 897 sa->sa_user_table[i] = ATTR_NUM(attr_value); 898 break; 899 default: 900 goto bail; 901 } 902 } 903 904 sa->sa_num_attrs = sa_attr_count; 905 tb = sa->sa_attr_table = 906 kmem_zalloc(sizeof (sa_attr_table_t) * sa_attr_count, KM_SLEEP); 907 908 /* 909 * Attribute table is constructed from requested attribute list, 910 * previously foreign registered attributes, and also the legacy 911 * ZPL set of attributes. 912 */ 913 914 if (sa->sa_reg_attr_obj) { 915 for (zap_cursor_init(&zc, os, sa->sa_reg_attr_obj); 916 (error = zap_cursor_retrieve(&zc, &za)) == 0; 917 zap_cursor_advance(&zc)) { 918 uint64_t value; 919 value = za.za_first_integer; 920 921 registered_count++; 922 tb[ATTR_NUM(value)].sa_attr = ATTR_NUM(value); 923 tb[ATTR_NUM(value)].sa_length = ATTR_LENGTH(value); 924 tb[ATTR_NUM(value)].sa_byteswap = ATTR_BSWAP(value); 925 tb[ATTR_NUM(value)].sa_registered = B_TRUE; 926 927 if (tb[ATTR_NUM(value)].sa_name) { 928 continue; 929 } 930 tb[ATTR_NUM(value)].sa_name = 931 kmem_zalloc(strlen(za.za_name) +1, KM_SLEEP); 932 (void) strlcpy(tb[ATTR_NUM(value)].sa_name, za.za_name, 933 strlen(za.za_name) +1); 934 } 935 zap_cursor_fini(&zc); 936 /* 937 * Make sure we processed the correct number of registered 938 * attributes 939 */ 940 if (registered_count != sa_reg_count) { 941 ASSERT(error != 0); 942 goto bail; 943 } 944 945 } 946 947 if (ostype == DMU_OST_ZFS) { 948 for (i = 0; i != sa_legacy_attr_count; i++) { 949 if (tb[i].sa_name) 950 continue; 951 tb[i].sa_attr = sa_legacy_attrs[i].sa_attr; 952 tb[i].sa_length = sa_legacy_attrs[i].sa_length; 953 tb[i].sa_byteswap = sa_legacy_attrs[i].sa_byteswap; 954 tb[i].sa_registered = B_FALSE; 955 tb[i].sa_name = 956 kmem_zalloc(strlen(sa_legacy_attrs[i].sa_name) +1, 957 KM_SLEEP); 958 (void) strlcpy(tb[i].sa_name, 959 sa_legacy_attrs[i].sa_name, 960 strlen(sa_legacy_attrs[i].sa_name) + 1); 961 } 962 } 963 964 for (i = 0; i != count; i++) { 965 sa_attr_type_t attr_id; 966 967 attr_id = sa->sa_user_table[i]; 968 if (tb[attr_id].sa_name) 969 continue; 970 971 tb[attr_id].sa_length = reg_attrs[i].sa_length; 972 tb[attr_id].sa_byteswap = reg_attrs[i].sa_byteswap; 973 tb[attr_id].sa_attr = attr_id; 974 tb[attr_id].sa_name = 975 kmem_zalloc(strlen(reg_attrs[i].sa_name) + 1, KM_SLEEP); 976 (void) strlcpy(tb[attr_id].sa_name, reg_attrs[i].sa_name, 977 strlen(reg_attrs[i].sa_name) + 1); 978 } 979 980 sa->sa_need_attr_registration = 981 (sa_attr_count != registered_count); 982 983 return (0); 984bail: 985 kmem_free(sa->sa_user_table, count * sizeof (sa_attr_type_t)); 986 sa->sa_user_table = NULL; 987 sa_free_attr_table(sa); 988 return ((error != 0) ? error : EINVAL); 989} 990 991int 992sa_setup(objset_t *os, uint64_t sa_obj, sa_attr_reg_t *reg_attrs, int count, 993 sa_attr_type_t **user_table) 994{ 995 zap_cursor_t zc; 996 zap_attribute_t za; 997 sa_os_t *sa; 998 dmu_objset_type_t ostype = dmu_objset_type(os); 999 sa_attr_type_t *tb; 1000 int error; 1001 1002 mutex_enter(&os->os_user_ptr_lock); 1003 if (os->os_sa) { 1004 mutex_enter(&os->os_sa->sa_lock); 1005 mutex_exit(&os->os_user_ptr_lock); 1006 tb = os->os_sa->sa_user_table; 1007 mutex_exit(&os->os_sa->sa_lock); 1008 *user_table = tb; 1009 return (0); 1010 } 1011 1012 sa = kmem_zalloc(sizeof (sa_os_t), KM_SLEEP); 1013 mutex_init(&sa->sa_lock, NULL, MUTEX_DEFAULT, NULL); 1014 sa->sa_master_obj = sa_obj; 1015 1016 os->os_sa = sa; 1017 mutex_enter(&sa->sa_lock); 1018 mutex_exit(&os->os_user_ptr_lock); 1019 avl_create(&sa->sa_layout_num_tree, layout_num_compare, 1020 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_num_node)); 1021 avl_create(&sa->sa_layout_hash_tree, layout_hash_compare, 1022 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_hash_node)); 1023 1024 if (sa_obj) { 1025 error = zap_lookup(os, sa_obj, SA_LAYOUTS, 1026 8, 1, &sa->sa_layout_attr_obj); 1027 if (error != 0 && error != ENOENT) 1028 goto fail; 1029 error = zap_lookup(os, sa_obj, SA_REGISTRY, 1030 8, 1, &sa->sa_reg_attr_obj); 1031 if (error != 0 && error != ENOENT) 1032 goto fail; 1033 } 1034 1035 if ((error = sa_attr_table_setup(os, reg_attrs, count)) != 0) 1036 goto fail; 1037 1038 if (sa->sa_layout_attr_obj != 0) { 1039 uint64_t layout_count; 1040 1041 error = zap_count(os, sa->sa_layout_attr_obj, 1042 &layout_count); 1043 1044 /* 1045 * Layout number count should be > 0 1046 */ 1047 if (error || (error == 0 && layout_count == 0)) { 1048 if (error == 0) 1049 error = SET_ERROR(EINVAL); 1050 goto fail; 1051 } 1052 1053 for (zap_cursor_init(&zc, os, sa->sa_layout_attr_obj); 1054 (error = zap_cursor_retrieve(&zc, &za)) == 0; 1055 zap_cursor_advance(&zc)) { 1056 sa_attr_type_t *lot_attrs; 1057 uint64_t lot_num; 1058 1059 lot_attrs = kmem_zalloc(sizeof (sa_attr_type_t) * 1060 za.za_num_integers, KM_SLEEP); 1061 1062 if ((error = (zap_lookup(os, sa->sa_layout_attr_obj, 1063 za.za_name, 2, za.za_num_integers, 1064 lot_attrs))) != 0) { 1065 kmem_free(lot_attrs, sizeof (sa_attr_type_t) * 1066 za.za_num_integers); 1067 break; 1068 } 1069 VERIFY(ddi_strtoull(za.za_name, NULL, 10, 1070 (unsigned long long *)&lot_num) == 0); 1071 1072 (void) sa_add_layout_entry(os, lot_attrs, 1073 za.za_num_integers, lot_num, 1074 sa_layout_info_hash(lot_attrs, 1075 za.za_num_integers), B_FALSE, NULL); 1076 kmem_free(lot_attrs, sizeof (sa_attr_type_t) * 1077 za.za_num_integers); 1078 } 1079 zap_cursor_fini(&zc); 1080 1081 /* 1082 * Make sure layout count matches number of entries added 1083 * to AVL tree 1084 */ 1085 if (avl_numnodes(&sa->sa_layout_num_tree) != layout_count) { 1086 ASSERT(error != 0); 1087 goto fail; 1088 } 1089 } 1090 1091 /* Add special layout number for old ZNODES */ 1092 if (ostype == DMU_OST_ZFS) { 1093 (void) sa_add_layout_entry(os, sa_legacy_zpl_layout, 1094 sa_legacy_attr_count, 0, 1095 sa_layout_info_hash(sa_legacy_zpl_layout, 1096 sa_legacy_attr_count), B_FALSE, NULL); 1097 1098 (void) sa_add_layout_entry(os, sa_dummy_zpl_layout, 0, 1, 1099 0, B_FALSE, NULL); 1100 } 1101 *user_table = os->os_sa->sa_user_table; 1102 mutex_exit(&sa->sa_lock); 1103 return (0); 1104fail: 1105 os->os_sa = NULL; 1106 sa_free_attr_table(sa); 1107 if (sa->sa_user_table) 1108 kmem_free(sa->sa_user_table, sa->sa_user_table_sz); 1109 mutex_exit(&sa->sa_lock); 1110 avl_destroy(&sa->sa_layout_hash_tree); 1111 avl_destroy(&sa->sa_layout_num_tree); 1112 mutex_destroy(&sa->sa_lock); 1113 kmem_free(sa, sizeof (sa_os_t)); 1114 return ((error == ECKSUM) ? EIO : error); 1115} 1116 1117void 1118sa_tear_down(objset_t *os) 1119{ 1120 sa_os_t *sa = os->os_sa; 1121 sa_lot_t *layout; 1122 void *cookie; 1123 1124 kmem_free(sa->sa_user_table, sa->sa_user_table_sz); 1125 1126 /* Free up attr table */ 1127 1128 sa_free_attr_table(sa); 1129 1130 cookie = NULL; 1131 while (layout = avl_destroy_nodes(&sa->sa_layout_hash_tree, &cookie)) { 1132 sa_idx_tab_t *tab; 1133 while (tab = list_head(&layout->lot_idx_tab)) { 1134 ASSERT(refcount_count(&tab->sa_refcount)); 1135 sa_idx_tab_rele(os, tab); 1136 } 1137 } 1138 1139 cookie = NULL; 1140 while (layout = avl_destroy_nodes(&sa->sa_layout_num_tree, &cookie)) { 1141 kmem_free(layout->lot_attrs, 1142 sizeof (sa_attr_type_t) * layout->lot_attr_count); 1143 kmem_free(layout, sizeof (sa_lot_t)); 1144 } 1145 1146 avl_destroy(&sa->sa_layout_hash_tree); 1147 avl_destroy(&sa->sa_layout_num_tree); 1148 mutex_destroy(&sa->sa_lock); 1149 1150 kmem_free(sa, sizeof (sa_os_t)); 1151 os->os_sa = NULL; 1152} 1153 1154void 1155sa_build_idx_tab(void *hdr, void *attr_addr, sa_attr_type_t attr, 1156 uint16_t length, int length_idx, boolean_t var_length, void *userp) 1157{ 1158 sa_idx_tab_t *idx_tab = userp; 1159 1160 if (var_length) { 1161 ASSERT(idx_tab->sa_variable_lengths); 1162 idx_tab->sa_variable_lengths[length_idx] = length; 1163 } 1164 TOC_ATTR_ENCODE(idx_tab->sa_idx_tab[attr], length_idx, 1165 (uint32_t)((uintptr_t)attr_addr - (uintptr_t)hdr)); 1166} 1167 1168static void 1169sa_attr_iter(objset_t *os, sa_hdr_phys_t *hdr, dmu_object_type_t type, 1170 sa_iterfunc_t func, sa_lot_t *tab, void *userp) 1171{ 1172 void *data_start; 1173 sa_lot_t *tb = tab; 1174 sa_lot_t search; 1175 avl_index_t loc; 1176 sa_os_t *sa = os->os_sa; 1177 int i; 1178 uint16_t *length_start = NULL; 1179 uint8_t length_idx = 0; 1180 1181 if (tab == NULL) { 1182 search.lot_num = SA_LAYOUT_NUM(hdr, type); 1183 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc); 1184 ASSERT(tb); 1185 } 1186 1187 if (IS_SA_BONUSTYPE(type)) { 1188 data_start = (void *)P2ROUNDUP(((uintptr_t)hdr + 1189 offsetof(sa_hdr_phys_t, sa_lengths) + 1190 (sizeof (uint16_t) * tb->lot_var_sizes)), 8); 1191 length_start = hdr->sa_lengths; 1192 } else { 1193 data_start = hdr; 1194 } 1195 1196 for (i = 0; i != tb->lot_attr_count; i++) { 1197 int attr_length, reg_length; 1198 uint8_t idx_len; 1199 1200 reg_length = sa->sa_attr_table[tb->lot_attrs[i]].sa_length; 1201 if (reg_length) { 1202 attr_length = reg_length; 1203 idx_len = 0; 1204 } else { 1205 attr_length = length_start[length_idx]; 1206 idx_len = length_idx++; 1207 } 1208 1209 func(hdr, data_start, tb->lot_attrs[i], attr_length, 1210 idx_len, reg_length == 0 ? B_TRUE : B_FALSE, userp); 1211 1212 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start + 1213 attr_length), 8); 1214 } 1215} 1216 1217/*ARGSUSED*/ 1218void 1219sa_byteswap_cb(void *hdr, void *attr_addr, sa_attr_type_t attr, 1220 uint16_t length, int length_idx, boolean_t variable_length, void *userp) 1221{ 1222 sa_handle_t *hdl = userp; 1223 sa_os_t *sa = hdl->sa_os->os_sa; 1224 1225 sa_bswap_table[sa->sa_attr_table[attr].sa_byteswap](attr_addr, length); 1226} 1227 1228void 1229sa_byteswap(sa_handle_t *hdl, sa_buf_type_t buftype) 1230{ 1231 sa_hdr_phys_t *sa_hdr_phys = SA_GET_HDR(hdl, buftype); 1232 dmu_buf_impl_t *db; 1233 sa_os_t *sa = hdl->sa_os->os_sa; 1234 int num_lengths = 1; 1235 int i; 1236 1237 ASSERT(MUTEX_HELD(&sa->sa_lock)); 1238 if (sa_hdr_phys->sa_magic == SA_MAGIC) 1239 return; 1240 1241 db = SA_GET_DB(hdl, buftype); 1242 1243 if (buftype == SA_SPILL) { 1244 arc_release(db->db_buf, NULL); 1245 arc_buf_thaw(db->db_buf); 1246 } 1247 1248 sa_hdr_phys->sa_magic = BSWAP_32(sa_hdr_phys->sa_magic); 1249 sa_hdr_phys->sa_layout_info = BSWAP_16(sa_hdr_phys->sa_layout_info); 1250 1251 /* 1252 * Determine number of variable lenghts in header 1253 * The standard 8 byte header has one for free and a 1254 * 16 byte header would have 4 + 1; 1255 */ 1256 if (SA_HDR_SIZE(sa_hdr_phys) > 8) 1257 num_lengths += (SA_HDR_SIZE(sa_hdr_phys) - 8) >> 1; 1258 for (i = 0; i != num_lengths; i++) 1259 sa_hdr_phys->sa_lengths[i] = 1260 BSWAP_16(sa_hdr_phys->sa_lengths[i]); 1261 1262 sa_attr_iter(hdl->sa_os, sa_hdr_phys, DMU_OT_SA, 1263 sa_byteswap_cb, NULL, hdl); 1264 1265 if (buftype == SA_SPILL) 1266 arc_buf_freeze(((dmu_buf_impl_t *)hdl->sa_spill)->db_buf); 1267} 1268 1269static int 1270sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype) 1271{ 1272 sa_hdr_phys_t *sa_hdr_phys; 1273 dmu_buf_impl_t *db = SA_GET_DB(hdl, buftype); 1274 dmu_object_type_t bonustype = SA_BONUSTYPE_FROM_DB(db); 1275 sa_os_t *sa = hdl->sa_os->os_sa; 1276 sa_idx_tab_t *idx_tab; 1277 1278 sa_hdr_phys = SA_GET_HDR(hdl, buftype); 1279 1280 mutex_enter(&sa->sa_lock); 1281 1282 /* Do we need to byteswap? */ 1283 1284 /* only check if not old znode */ 1285 if (IS_SA_BONUSTYPE(bonustype) && sa_hdr_phys->sa_magic != SA_MAGIC && 1286 sa_hdr_phys->sa_magic != 0) { 1287 VERIFY(BSWAP_32(sa_hdr_phys->sa_magic) == SA_MAGIC); 1288 sa_byteswap(hdl, buftype); 1289 } 1290 1291 idx_tab = sa_find_idx_tab(hdl->sa_os, bonustype, sa_hdr_phys); 1292 1293 if (buftype == SA_BONUS) 1294 hdl->sa_bonus_tab = idx_tab; 1295 else 1296 hdl->sa_spill_tab = idx_tab; 1297 1298 mutex_exit(&sa->sa_lock); 1299 return (0); 1300} 1301 1302/*ARGSUSED*/ 1303static void 1304sa_evict(void *dbu) 1305{ 1306 panic("evicting sa dbuf\n"); 1307} 1308 1309static void 1310sa_idx_tab_rele(objset_t *os, void *arg) 1311{ 1312 sa_os_t *sa = os->os_sa; 1313 sa_idx_tab_t *idx_tab = arg; 1314 1315 if (idx_tab == NULL) 1316 return; 1317 1318 mutex_enter(&sa->sa_lock); 1319 if (refcount_remove(&idx_tab->sa_refcount, NULL) == 0) { 1320 list_remove(&idx_tab->sa_layout->lot_idx_tab, idx_tab); 1321 if (idx_tab->sa_variable_lengths) 1322 kmem_free(idx_tab->sa_variable_lengths, 1323 sizeof (uint16_t) * 1324 idx_tab->sa_layout->lot_var_sizes); 1325 refcount_destroy(&idx_tab->sa_refcount); 1326 kmem_free(idx_tab->sa_idx_tab, 1327 sizeof (uint32_t) * sa->sa_num_attrs); 1328 kmem_free(idx_tab, sizeof (sa_idx_tab_t)); 1329 } 1330 mutex_exit(&sa->sa_lock); 1331} 1332 1333static void 1334sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab) 1335{ 1336 sa_os_t *sa = os->os_sa; 1337 1338 ASSERT(MUTEX_HELD(&sa->sa_lock)); 1339 (void) refcount_add(&idx_tab->sa_refcount, NULL); 1340} 1341 1342void 1343sa_handle_destroy(sa_handle_t *hdl) 1344{ 1345 dmu_buf_t *db = hdl->sa_bonus; 1346 1347 mutex_enter(&hdl->sa_lock); 1348 (void) dmu_buf_remove_user(db, &hdl->sa_dbu); 1349 1350 if (hdl->sa_bonus_tab) 1351 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab); 1352 1353 if (hdl->sa_spill_tab) 1354 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab); 1355 1356 dmu_buf_rele(hdl->sa_bonus, NULL); 1357 1358 if (hdl->sa_spill) 1359 dmu_buf_rele((dmu_buf_t *)hdl->sa_spill, NULL); 1360 mutex_exit(&hdl->sa_lock); 1361 1362 kmem_cache_free(sa_cache, hdl); 1363} 1364 1365int 1366sa_handle_get_from_db(objset_t *os, dmu_buf_t *db, void *userp, 1367 sa_handle_type_t hdl_type, sa_handle_t **handlepp) 1368{ 1369 int error = 0; 1370 dmu_object_info_t doi; 1371 sa_handle_t *handle = NULL; 1372 1373#ifdef ZFS_DEBUG 1374 dmu_object_info_from_db(db, &doi); 1375 ASSERT(doi.doi_bonus_type == DMU_OT_SA || 1376 doi.doi_bonus_type == DMU_OT_ZNODE); 1377#endif 1378 /* find handle, if it exists */ 1379 /* if one doesn't exist then create a new one, and initialize it */ 1380 1381 if (hdl_type == SA_HDL_SHARED) 1382 handle = dmu_buf_get_user(db); 1383 1384 if (handle == NULL) { 1385 sa_handle_t *winner = NULL; 1386 1387 handle = kmem_cache_alloc(sa_cache, KM_SLEEP); 1388 handle->sa_userp = userp; 1389 handle->sa_bonus = db; 1390 handle->sa_os = os; 1391 handle->sa_spill = NULL; 1392 handle->sa_bonus_tab = NULL; 1393 handle->sa_spill_tab = NULL; 1394 1395 error = sa_build_index(handle, SA_BONUS); 1396 1397 if (hdl_type == SA_HDL_SHARED) { 1398 dmu_buf_init_user(&handle->sa_dbu, sa_evict, NULL); 1399 winner = dmu_buf_set_user_ie(db, &handle->sa_dbu); 1400 } 1401 1402 if (winner != NULL) { 1403 kmem_cache_free(sa_cache, handle); 1404 handle = winner; 1405 } 1406 } 1407 *handlepp = handle; 1408 1409 return (error); 1410} 1411 1412int 1413sa_handle_get(objset_t *objset, uint64_t objid, void *userp, 1414 sa_handle_type_t hdl_type, sa_handle_t **handlepp) 1415{ 1416 dmu_buf_t *db; 1417 int error; 1418 1419 if (error = dmu_bonus_hold(objset, objid, NULL, &db)) 1420 return (error); 1421 1422 return (sa_handle_get_from_db(objset, db, userp, hdl_type, 1423 handlepp)); 1424} 1425 1426int 1427sa_buf_hold(objset_t *objset, uint64_t obj_num, void *tag, dmu_buf_t **db) 1428{ 1429 return (dmu_bonus_hold(objset, obj_num, tag, db)); 1430} 1431 1432void 1433sa_buf_rele(dmu_buf_t *db, void *tag) 1434{ 1435 dmu_buf_rele(db, tag); 1436} 1437 1438int 1439sa_lookup_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count) 1440{ 1441 ASSERT(hdl); 1442 ASSERT(MUTEX_HELD(&hdl->sa_lock)); 1443 return (sa_attr_op(hdl, bulk, count, SA_LOOKUP, NULL)); 1444} 1445 1446int 1447sa_lookup(sa_handle_t *hdl, sa_attr_type_t attr, void *buf, uint32_t buflen) 1448{ 1449 int error; 1450 sa_bulk_attr_t bulk; 1451 1452 bulk.sa_attr = attr; 1453 bulk.sa_data = buf; 1454 bulk.sa_length = buflen; 1455 bulk.sa_data_func = NULL; 1456 1457 ASSERT(hdl); 1458 mutex_enter(&hdl->sa_lock); 1459 error = sa_lookup_impl(hdl, &bulk, 1); 1460 mutex_exit(&hdl->sa_lock); 1461 return (error); 1462} 1463 1464#ifdef _KERNEL 1465int 1466sa_lookup_uio(sa_handle_t *hdl, sa_attr_type_t attr, uio_t *uio) 1467{ 1468 int error; 1469 sa_bulk_attr_t bulk; 1470 1471 bulk.sa_data = NULL; 1472 bulk.sa_attr = attr; 1473 bulk.sa_data_func = NULL; 1474 1475 ASSERT(hdl); 1476 1477 mutex_enter(&hdl->sa_lock); 1478 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) == 0) { 1479 error = uiomove((void *)bulk.sa_addr, MIN(bulk.sa_size, 1480 uio->uio_resid), UIO_READ, uio); 1481 } 1482 mutex_exit(&hdl->sa_lock); 1483 return (error); 1484 1485} 1486#endif 1487 1488void * 1489sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype, void *data) 1490{ 1491 sa_idx_tab_t *idx_tab; 1492 sa_hdr_phys_t *hdr = (sa_hdr_phys_t *)data; 1493 sa_os_t *sa = os->os_sa; 1494 sa_lot_t *tb, search; 1495 avl_index_t loc; 1496 1497 /* 1498 * Deterimine layout number. If SA node and header == 0 then 1499 * force the index table to the dummy "1" empty layout. 1500 * 1501 * The layout number would only be zero for a newly created file 1502 * that has not added any attributes yet, or with crypto enabled which 1503 * doesn't write any attributes to the bonus buffer. 1504 */ 1505 1506 search.lot_num = SA_LAYOUT_NUM(hdr, bonustype); 1507 1508 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc); 1509 1510 /* Verify header size is consistent with layout information */ 1511 ASSERT(tb); 1512 ASSERT(IS_SA_BONUSTYPE(bonustype) && 1513 SA_HDR_SIZE_MATCH_LAYOUT(hdr, tb) || !IS_SA_BONUSTYPE(bonustype) || 1514 (IS_SA_BONUSTYPE(bonustype) && hdr->sa_layout_info == 0)); 1515 1516 /* 1517 * See if any of the already existing TOC entries can be reused? 1518 */ 1519 1520 for (idx_tab = list_head(&tb->lot_idx_tab); idx_tab; 1521 idx_tab = list_next(&tb->lot_idx_tab, idx_tab)) { 1522 boolean_t valid_idx = B_TRUE; 1523 int i; 1524 1525 if (tb->lot_var_sizes != 0 && 1526 idx_tab->sa_variable_lengths != NULL) { 1527 for (i = 0; i != tb->lot_var_sizes; i++) { 1528 if (hdr->sa_lengths[i] != 1529 idx_tab->sa_variable_lengths[i]) { 1530 valid_idx = B_FALSE; 1531 break; 1532 } 1533 } 1534 } 1535 if (valid_idx) { 1536 sa_idx_tab_hold(os, idx_tab); 1537 return (idx_tab); 1538 } 1539 } 1540 1541 /* No such luck, create a new entry */ 1542 idx_tab = kmem_zalloc(sizeof (sa_idx_tab_t), KM_SLEEP); 1543 idx_tab->sa_idx_tab = 1544 kmem_zalloc(sizeof (uint32_t) * sa->sa_num_attrs, KM_SLEEP); 1545 idx_tab->sa_layout = tb; 1546 refcount_create(&idx_tab->sa_refcount); 1547 if (tb->lot_var_sizes) 1548 idx_tab->sa_variable_lengths = kmem_alloc(sizeof (uint16_t) * 1549 tb->lot_var_sizes, KM_SLEEP); 1550 1551 sa_attr_iter(os, hdr, bonustype, sa_build_idx_tab, 1552 tb, idx_tab); 1553 sa_idx_tab_hold(os, idx_tab); /* one hold for consumer */ 1554 sa_idx_tab_hold(os, idx_tab); /* one for layout */ 1555 list_insert_tail(&tb->lot_idx_tab, idx_tab); 1556 return (idx_tab); 1557} 1558 1559void 1560sa_default_locator(void **dataptr, uint32_t *len, uint32_t total_len, 1561 boolean_t start, void *userdata) 1562{ 1563 ASSERT(start); 1564 1565 *dataptr = userdata; 1566 *len = total_len; 1567} 1568 1569static void 1570sa_attr_register_sync(sa_handle_t *hdl, dmu_tx_t *tx) 1571{ 1572 uint64_t attr_value = 0; 1573 sa_os_t *sa = hdl->sa_os->os_sa; 1574 sa_attr_table_t *tb = sa->sa_attr_table; 1575 int i; 1576 1577 mutex_enter(&sa->sa_lock); 1578 1579 if (!sa->sa_need_attr_registration || sa->sa_master_obj == 0) { 1580 mutex_exit(&sa->sa_lock); 1581 return; 1582 } 1583 1584 if (sa->sa_reg_attr_obj == 0) { 1585 sa->sa_reg_attr_obj = zap_create_link(hdl->sa_os, 1586 DMU_OT_SA_ATTR_REGISTRATION, 1587 sa->sa_master_obj, SA_REGISTRY, tx); 1588 } 1589 for (i = 0; i != sa->sa_num_attrs; i++) { 1590 if (sa->sa_attr_table[i].sa_registered) 1591 continue; 1592 ATTR_ENCODE(attr_value, tb[i].sa_attr, tb[i].sa_length, 1593 tb[i].sa_byteswap); 1594 VERIFY(0 == zap_update(hdl->sa_os, sa->sa_reg_attr_obj, 1595 tb[i].sa_name, 8, 1, &attr_value, tx)); 1596 tb[i].sa_registered = B_TRUE; 1597 } 1598 sa->sa_need_attr_registration = B_FALSE; 1599 mutex_exit(&sa->sa_lock); 1600} 1601 1602/* 1603 * Replace all attributes with attributes specified in template. 1604 * If dnode had a spill buffer then those attributes will be 1605 * also be replaced, possibly with just an empty spill block 1606 * 1607 * This interface is intended to only be used for bulk adding of 1608 * attributes for a new file. It will also be used by the ZPL 1609 * when converting and old formatted znode to native SA support. 1610 */ 1611int 1612sa_replace_all_by_template_locked(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, 1613 int attr_count, dmu_tx_t *tx) 1614{ 1615 sa_os_t *sa = hdl->sa_os->os_sa; 1616 1617 if (sa->sa_need_attr_registration) 1618 sa_attr_register_sync(hdl, tx); 1619 return (sa_build_layouts(hdl, attr_desc, attr_count, tx)); 1620} 1621 1622int 1623sa_replace_all_by_template(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, 1624 int attr_count, dmu_tx_t *tx) 1625{ 1626 int error; 1627 1628 mutex_enter(&hdl->sa_lock); 1629 error = sa_replace_all_by_template_locked(hdl, attr_desc, 1630 attr_count, tx); 1631 mutex_exit(&hdl->sa_lock); 1632 return (error); 1633} 1634 1635/* 1636 * Add/remove a single attribute or replace a variable-sized attribute value 1637 * with a value of a different size, and then rewrite the entire set 1638 * of attributes. 1639 * Same-length attribute value replacement (including fixed-length attributes) 1640 * is handled more efficiently by the upper layers. 1641 */ 1642static int 1643sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr, 1644 sa_data_op_t action, sa_data_locator_t *locator, void *datastart, 1645 uint16_t buflen, dmu_tx_t *tx) 1646{ 1647 sa_os_t *sa = hdl->sa_os->os_sa; 1648 dmu_buf_impl_t *db = (dmu_buf_impl_t *)hdl->sa_bonus; 1649 dnode_t *dn; 1650 sa_bulk_attr_t *attr_desc; 1651 void *old_data[2]; 1652 int bonus_attr_count = 0; 1653 int bonus_data_size = 0; 1654 int spill_data_size = 0; 1655 int spill_attr_count = 0; 1656 int error; 1657 uint16_t length; 1658 int i, j, k, length_idx; 1659 sa_hdr_phys_t *hdr; 1660 sa_idx_tab_t *idx_tab; 1661 int attr_count; 1662 int count; 1663 1664 ASSERT(MUTEX_HELD(&hdl->sa_lock)); 1665 1666 /* First make of copy of the old data */ 1667 1668 DB_DNODE_ENTER(db); 1669 dn = DB_DNODE(db); 1670 if (dn->dn_bonuslen != 0) { 1671 bonus_data_size = hdl->sa_bonus->db_size; 1672 old_data[0] = kmem_alloc(bonus_data_size, KM_SLEEP); 1673 bcopy(hdl->sa_bonus->db_data, old_data[0], 1674 hdl->sa_bonus->db_size); 1675 bonus_attr_count = hdl->sa_bonus_tab->sa_layout->lot_attr_count; 1676 } else { 1677 old_data[0] = NULL; 1678 } 1679 DB_DNODE_EXIT(db); 1680 1681 /* Bring spill buffer online if it isn't currently */ 1682 1683 if ((error = sa_get_spill(hdl)) == 0) { 1684 spill_data_size = hdl->sa_spill->db_size; 1685 old_data[1] = kmem_alloc(spill_data_size, KM_SLEEP); 1686 bcopy(hdl->sa_spill->db_data, old_data[1], 1687 hdl->sa_spill->db_size); 1688 spill_attr_count = 1689 hdl->sa_spill_tab->sa_layout->lot_attr_count; 1690 } else if (error && error != ENOENT) { 1691 if (old_data[0]) 1692 kmem_free(old_data[0], bonus_data_size); 1693 return (error); 1694 } else { 1695 old_data[1] = NULL; 1696 } 1697 1698 /* build descriptor of all attributes */ 1699 1700 attr_count = bonus_attr_count + spill_attr_count; 1701 if (action == SA_ADD) 1702 attr_count++; 1703 else if (action == SA_REMOVE) 1704 attr_count--; 1705 1706 attr_desc = kmem_zalloc(sizeof (sa_bulk_attr_t) * attr_count, KM_SLEEP); 1707 1708 /* 1709 * loop through bonus and spill buffer if it exists, and 1710 * build up new attr_descriptor to reset the attributes 1711 */ 1712 k = j = 0; 1713 count = bonus_attr_count; 1714 hdr = SA_GET_HDR(hdl, SA_BONUS); 1715 idx_tab = SA_IDX_TAB_GET(hdl, SA_BONUS); 1716 for (; k != 2; k++) { 1717 /* iterate over each attribute in layout */ 1718 for (i = 0, length_idx = 0; i != count; i++) { 1719 sa_attr_type_t attr; 1720 1721 attr = idx_tab->sa_layout->lot_attrs[i]; 1722 if (attr == newattr) { 1723 /* duplicate attributes are not allowed */ 1724 ASSERT(action == SA_REPLACE || 1725 action == SA_REMOVE); 1726 /* must be variable-sized to be replaced here */ 1727 if (action == SA_REPLACE) { 1728 ASSERT(SA_REGISTERED_LEN(sa, attr) == 0); 1729 SA_ADD_BULK_ATTR(attr_desc, j, attr, 1730 locator, datastart, buflen); 1731 } 1732 } else { 1733 length = SA_REGISTERED_LEN(sa, attr); 1734 if (length == 0) { 1735 length = hdr->sa_lengths[length_idx]; 1736 } 1737 1738 SA_ADD_BULK_ATTR(attr_desc, j, attr, 1739 NULL, (void *) 1740 (TOC_OFF(idx_tab->sa_idx_tab[attr]) + 1741 (uintptr_t)old_data[k]), length); 1742 } 1743 if (SA_REGISTERED_LEN(sa, attr) == 0) 1744 length_idx++; 1745 } 1746 if (k == 0 && hdl->sa_spill) { 1747 hdr = SA_GET_HDR(hdl, SA_SPILL); 1748 idx_tab = SA_IDX_TAB_GET(hdl, SA_SPILL); 1749 count = spill_attr_count; 1750 } else { 1751 break; 1752 } 1753 } 1754 if (action == SA_ADD) { 1755 length = SA_REGISTERED_LEN(sa, newattr); 1756 if (length == 0) { 1757 length = buflen; 1758 } 1759 SA_ADD_BULK_ATTR(attr_desc, j, newattr, locator, 1760 datastart, buflen); 1761 } 1762 ASSERT3U(j, ==, attr_count); 1763 1764 error = sa_build_layouts(hdl, attr_desc, attr_count, tx); 1765 1766 if (old_data[0]) 1767 kmem_free(old_data[0], bonus_data_size); 1768 if (old_data[1]) 1769 kmem_free(old_data[1], spill_data_size); 1770 kmem_free(attr_desc, sizeof (sa_bulk_attr_t) * attr_count); 1771 1772 return (error); 1773} 1774 1775static int 1776sa_bulk_update_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count, 1777 dmu_tx_t *tx) 1778{ 1779 int error; 1780 sa_os_t *sa = hdl->sa_os->os_sa; 1781 dmu_object_type_t bonustype; 1782 1783 bonustype = SA_BONUSTYPE_FROM_DB(SA_GET_DB(hdl, SA_BONUS)); 1784 1785 ASSERT(hdl); 1786 ASSERT(MUTEX_HELD(&hdl->sa_lock)); 1787 1788 /* sync out registration table if necessary */ 1789 if (sa->sa_need_attr_registration) 1790 sa_attr_register_sync(hdl, tx); 1791 1792 error = sa_attr_op(hdl, bulk, count, SA_UPDATE, tx); 1793 if (error == 0 && !IS_SA_BONUSTYPE(bonustype) && sa->sa_update_cb) 1794 sa->sa_update_cb(hdl, tx); 1795 1796 return (error); 1797} 1798 1799/* 1800 * update or add new attribute 1801 */ 1802int 1803sa_update(sa_handle_t *hdl, sa_attr_type_t type, 1804 void *buf, uint32_t buflen, dmu_tx_t *tx) 1805{ 1806 int error; 1807 sa_bulk_attr_t bulk; 1808 1809 bulk.sa_attr = type; 1810 bulk.sa_data_func = NULL; 1811 bulk.sa_length = buflen; 1812 bulk.sa_data = buf; 1813 1814 mutex_enter(&hdl->sa_lock); 1815 error = sa_bulk_update_impl(hdl, &bulk, 1, tx); 1816 mutex_exit(&hdl->sa_lock); 1817 return (error); 1818} 1819 1820int 1821sa_update_from_cb(sa_handle_t *hdl, sa_attr_type_t attr, 1822 uint32_t buflen, sa_data_locator_t *locator, void *userdata, dmu_tx_t *tx) 1823{ 1824 int error; 1825 sa_bulk_attr_t bulk; 1826 1827 bulk.sa_attr = attr; 1828 bulk.sa_data = userdata; 1829 bulk.sa_data_func = locator; 1830 bulk.sa_length = buflen; 1831 1832 mutex_enter(&hdl->sa_lock); 1833 error = sa_bulk_update_impl(hdl, &bulk, 1, tx); 1834 mutex_exit(&hdl->sa_lock); 1835 return (error); 1836} 1837 1838/* 1839 * Return size of an attribute 1840 */ 1841 1842int 1843sa_size(sa_handle_t *hdl, sa_attr_type_t attr, int *size) 1844{ 1845 sa_bulk_attr_t bulk; 1846 int error; 1847 1848 bulk.sa_data = NULL; 1849 bulk.sa_attr = attr; 1850 bulk.sa_data_func = NULL; 1851 1852 ASSERT(hdl); 1853 mutex_enter(&hdl->sa_lock); 1854 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) != 0) { 1855 mutex_exit(&hdl->sa_lock); 1856 return (error); 1857 } 1858 *size = bulk.sa_size; 1859 1860 mutex_exit(&hdl->sa_lock); 1861 return (0); 1862} 1863 1864int 1865sa_bulk_lookup_locked(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count) 1866{ 1867 ASSERT(hdl); 1868 ASSERT(MUTEX_HELD(&hdl->sa_lock)); 1869 return (sa_lookup_impl(hdl, attrs, count)); 1870} 1871 1872int 1873sa_bulk_lookup(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count) 1874{ 1875 int error; 1876 1877 ASSERT(hdl); 1878 mutex_enter(&hdl->sa_lock); 1879 error = sa_bulk_lookup_locked(hdl, attrs, count); 1880 mutex_exit(&hdl->sa_lock); 1881 return (error); 1882} 1883 1884int 1885sa_bulk_update(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count, dmu_tx_t *tx) 1886{ 1887 int error; 1888 1889 ASSERT(hdl); 1890 mutex_enter(&hdl->sa_lock); 1891 error = sa_bulk_update_impl(hdl, attrs, count, tx); 1892 mutex_exit(&hdl->sa_lock); 1893 return (error); 1894} 1895 1896int 1897sa_remove(sa_handle_t *hdl, sa_attr_type_t attr, dmu_tx_t *tx) 1898{ 1899 int error; 1900 1901 mutex_enter(&hdl->sa_lock); 1902 error = sa_modify_attrs(hdl, attr, SA_REMOVE, NULL, 1903 NULL, 0, tx); 1904 mutex_exit(&hdl->sa_lock); 1905 return (error); 1906} 1907 1908void 1909sa_object_info(sa_handle_t *hdl, dmu_object_info_t *doi) 1910{ 1911 dmu_object_info_from_db((dmu_buf_t *)hdl->sa_bonus, doi); 1912} 1913 1914void 1915sa_object_size(sa_handle_t *hdl, uint32_t *blksize, u_longlong_t *nblocks) 1916{ 1917 dmu_object_size_from_db((dmu_buf_t *)hdl->sa_bonus, 1918 blksize, nblocks); 1919} 1920 1921void 1922sa_set_userp(sa_handle_t *hdl, void *ptr) 1923{ 1924 hdl->sa_userp = ptr; 1925} 1926 1927dmu_buf_t * 1928sa_get_db(sa_handle_t *hdl) 1929{ 1930 return ((dmu_buf_t *)hdl->sa_bonus); 1931} 1932 1933void * 1934sa_get_userdata(sa_handle_t *hdl) 1935{ 1936 return (hdl->sa_userp); 1937} 1938 1939void 1940sa_register_update_callback_locked(objset_t *os, sa_update_cb_t *func) 1941{ 1942 ASSERT(MUTEX_HELD(&os->os_sa->sa_lock)); 1943 os->os_sa->sa_update_cb = func; 1944} 1945 1946void 1947sa_register_update_callback(objset_t *os, sa_update_cb_t *func) 1948{ 1949 1950 mutex_enter(&os->os_sa->sa_lock); 1951 sa_register_update_callback_locked(os, func); 1952 mutex_exit(&os->os_sa->sa_lock); 1953} 1954 1955uint64_t 1956sa_handle_object(sa_handle_t *hdl) 1957{ 1958 return (hdl->sa_bonus->db_object); 1959} 1960 1961boolean_t 1962sa_enabled(objset_t *os) 1963{ 1964 return (os->os_sa == NULL); 1965} 1966 1967int 1968sa_set_sa_object(objset_t *os, uint64_t sa_object) 1969{ 1970 sa_os_t *sa = os->os_sa; 1971 1972 if (sa->sa_master_obj) 1973 return (1); 1974 1975 sa->sa_master_obj = sa_object; 1976 1977 return (0); 1978} 1979 1980int 1981sa_hdrsize(void *arg) 1982{ 1983 sa_hdr_phys_t *hdr = arg; 1984 1985 return (SA_HDR_SIZE(hdr)); 1986} 1987 1988void 1989sa_handle_lock(sa_handle_t *hdl) 1990{ 1991 ASSERT(hdl); 1992 mutex_enter(&hdl->sa_lock); 1993} 1994 1995void 1996sa_handle_unlock(sa_handle_t *hdl) 1997{ 1998 ASSERT(hdl); 1999 mutex_exit(&hdl->sa_lock); 2000} 2001