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3752 want more verifiable dbuf user eviction
Submitted by: Justin Gibbs <justing@spectralogic.com>
Submitted by: Will Andrews <willa@spectralogic.com>
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--- old/usr/src/uts/common/fs/zfs/sa.c
+++ new/usr/src/uts/common/fs/zfs/sa.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
24 24 * Portions Copyright 2011 iXsystems, Inc
25 25 * Copyright (c) 2013 by Delphix. All rights reserved.
26 26 */
27 27
28 28 #include <sys/zfs_context.h>
29 29 #include <sys/types.h>
30 30 #include <sys/param.h>
31 31 #include <sys/systm.h>
32 32 #include <sys/sysmacros.h>
33 33 #include <sys/dmu.h>
34 34 #include <sys/dmu_impl.h>
35 35 #include <sys/dmu_objset.h>
36 36 #include <sys/dbuf.h>
37 37 #include <sys/dnode.h>
38 38 #include <sys/zap.h>
39 39 #include <sys/sa.h>
40 40 #include <sys/sunddi.h>
41 41 #include <sys/sa_impl.h>
42 42 #include <sys/dnode.h>
43 43 #include <sys/errno.h>
44 44 #include <sys/zfs_context.h>
45 45
46 46 /*
47 47 * ZFS System attributes:
48 48 *
49 49 * A generic mechanism to allow for arbitrary attributes
50 50 * to be stored in a dnode. The data will be stored in the bonus buffer of
51 51 * the dnode and if necessary a special "spill" block will be used to handle
52 52 * overflow situations. The spill block will be sized to fit the data
53 53 * from 512 - 128K. When a spill block is used the BP (blkptr_t) for the
54 54 * spill block is stored at the end of the current bonus buffer. Any
55 55 * attributes that would be in the way of the blkptr_t will be relocated
56 56 * into the spill block.
57 57 *
58 58 * Attribute registration:
59 59 *
60 60 * Stored persistently on a per dataset basis
61 61 * a mapping between attribute "string" names and their actual attribute
62 62 * numeric values, length, and byteswap function. The names are only used
63 63 * during registration. All attributes are known by their unique attribute
64 64 * id value. If an attribute can have a variable size then the value
65 65 * 0 will be used to indicate this.
66 66 *
67 67 * Attribute Layout:
68 68 *
69 69 * Attribute layouts are a way to compactly store multiple attributes, but
70 70 * without taking the overhead associated with managing each attribute
71 71 * individually. Since you will typically have the same set of attributes
72 72 * stored in the same order a single table will be used to represent that
73 73 * layout. The ZPL for example will usually have only about 10 different
74 74 * layouts (regular files, device files, symlinks,
75 75 * regular files + scanstamp, files/dir with extended attributes, and then
76 76 * you have the possibility of all of those minus ACL, because it would
77 77 * be kicked out into the spill block)
78 78 *
79 79 * Layouts are simply an array of the attributes and their
80 80 * ordering i.e. [0, 1, 4, 5, 2]
81 81 *
82 82 * Each distinct layout is given a unique layout number and that is whats
83 83 * stored in the header at the beginning of the SA data buffer.
84 84 *
85 85 * A layout only covers a single dbuf (bonus or spill). If a set of
86 86 * attributes is split up between the bonus buffer and a spill buffer then
87 87 * two different layouts will be used. This allows us to byteswap the
88 88 * spill without looking at the bonus buffer and keeps the on disk format of
89 89 * the bonus and spill buffer the same.
90 90 *
91 91 * Adding a single attribute will cause the entire set of attributes to
92 92 * be rewritten and could result in a new layout number being constructed
93 93 * as part of the rewrite if no such layout exists for the new set of
94 94 * attribues. The new attribute will be appended to the end of the already
95 95 * existing attributes.
96 96 *
97 97 * Both the attribute registration and attribute layout information are
98 98 * stored in normal ZAP attributes. Their should be a small number of
99 99 * known layouts and the set of attributes is assumed to typically be quite
100 100 * small.
101 101 *
102 102 * The registered attributes and layout "table" information is maintained
103 103 * in core and a special "sa_os_t" is attached to the objset_t.
104 104 *
105 105 * A special interface is provided to allow for quickly applying
106 106 * a large set of attributes at once. sa_replace_all_by_template() is
107 107 * used to set an array of attributes. This is used by the ZPL when
108 108 * creating a brand new file. The template that is passed into the function
109 109 * specifies the attribute, size for variable length attributes, location of
110 110 * data and special "data locator" function if the data isn't in a contiguous
111 111 * location.
112 112 *
113 113 * Byteswap implications:
114 114 * Since the SA attributes are not entirely self describing we can't do
115 115 * the normal byteswap processing. The special ZAP layout attribute and
116 116 * attribute registration attributes define the byteswap function and the
117 117 * size of the attributes, unless it is variable sized.
118 118 * The normal ZFS byteswapping infrastructure assumes you don't need
119 119 * to read any objects in order to do the necessary byteswapping. Whereas
120 120 * SA attributes can only be properly byteswapped if the dataset is opened
121 121 * and the layout/attribute ZAP attributes are available. Because of this
122 122 * the SA attributes will be byteswapped when they are first accessed by
123 123 * the SA code that will read the SA data.
124 124 */
125 125
126 126 typedef void (sa_iterfunc_t)(void *hdr, void *addr, sa_attr_type_t,
127 127 uint16_t length, int length_idx, boolean_t, void *userp);
128 128
129 129 static int sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype);
130 130 static void sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab);
131 131 static void *sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype,
132 132 void *data);
133 133 static void sa_idx_tab_rele(objset_t *os, void *arg);
134 134 static void sa_copy_data(sa_data_locator_t *func, void *start, void *target,
135 135 int buflen);
136 136 static int sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
137 137 sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
138 138 uint16_t buflen, dmu_tx_t *tx);
139 139
140 140 arc_byteswap_func_t *sa_bswap_table[] = {
141 141 byteswap_uint64_array,
142 142 byteswap_uint32_array,
143 143 byteswap_uint16_array,
144 144 byteswap_uint8_array,
145 145 zfs_acl_byteswap,
146 146 };
147 147
148 148 #define SA_COPY_DATA(f, s, t, l) \
149 149 { \
150 150 if (f == NULL) { \
151 151 if (l == 8) { \
152 152 *(uint64_t *)t = *(uint64_t *)s; \
153 153 } else if (l == 16) { \
154 154 *(uint64_t *)t = *(uint64_t *)s; \
155 155 *(uint64_t *)((uintptr_t)t + 8) = \
156 156 *(uint64_t *)((uintptr_t)s + 8); \
157 157 } else { \
158 158 bcopy(s, t, l); \
159 159 } \
160 160 } else \
161 161 sa_copy_data(f, s, t, l); \
162 162 }
163 163
164 164 /*
165 165 * This table is fixed and cannot be changed. Its purpose is to
166 166 * allow the SA code to work with both old/new ZPL file systems.
167 167 * It contains the list of legacy attributes. These attributes aren't
168 168 * stored in the "attribute" registry zap objects, since older ZPL file systems
169 169 * won't have the registry. Only objsets of type ZFS_TYPE_FILESYSTEM will
170 170 * use this static table.
171 171 */
172 172 sa_attr_reg_t sa_legacy_attrs[] = {
173 173 {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0},
174 174 {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1},
175 175 {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2},
176 176 {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3},
177 177 {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4},
178 178 {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5},
179 179 {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6},
180 180 {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7},
181 181 {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8},
182 182 {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9},
183 183 {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10},
184 184 {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11},
185 185 {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12},
186 186 {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13},
187 187 {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14},
188 188 {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15},
189 189 };
190 190
191 191 /*
192 192 * ZPL legacy layout
193 193 * This is only used for objects of type DMU_OT_ZNODE
194 194 */
195 195 sa_attr_type_t sa_legacy_zpl_layout[] = {
196 196 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
197 197 };
198 198
199 199 /*
200 200 * Special dummy layout used for buffers with no attributes.
201 201 */
202 202
203 203 sa_attr_type_t sa_dummy_zpl_layout[] = { 0 };
204 204
205 205 static int sa_legacy_attr_count = 16;
206 206 static kmem_cache_t *sa_cache = NULL;
207 207
208 208 /*ARGSUSED*/
209 209 static int
210 210 sa_cache_constructor(void *buf, void *unused, int kmflag)
211 211 {
212 212 sa_handle_t *hdl = buf;
213 213
214 214 hdl->sa_bonus_tab = NULL;
215 215 hdl->sa_spill_tab = NULL;
216 216 hdl->sa_os = NULL;
217 217 hdl->sa_userp = NULL;
218 218 hdl->sa_bonus = NULL;
219 219 hdl->sa_spill = NULL;
220 220 mutex_init(&hdl->sa_lock, NULL, MUTEX_DEFAULT, NULL);
221 221 return (0);
222 222 }
223 223
224 224 /*ARGSUSED*/
225 225 static void
226 226 sa_cache_destructor(void *buf, void *unused)
227 227 {
228 228 sa_handle_t *hdl = buf;
229 229 mutex_destroy(&hdl->sa_lock);
230 230 }
231 231
232 232 void
233 233 sa_cache_init(void)
234 234 {
235 235 sa_cache = kmem_cache_create("sa_cache",
236 236 sizeof (sa_handle_t), 0, sa_cache_constructor,
237 237 sa_cache_destructor, NULL, NULL, NULL, 0);
238 238 }
239 239
240 240 void
241 241 sa_cache_fini(void)
242 242 {
243 243 if (sa_cache)
244 244 kmem_cache_destroy(sa_cache);
245 245 }
246 246
247 247 static int
248 248 layout_num_compare(const void *arg1, const void *arg2)
249 249 {
250 250 const sa_lot_t *node1 = arg1;
251 251 const sa_lot_t *node2 = arg2;
252 252
253 253 if (node1->lot_num > node2->lot_num)
254 254 return (1);
255 255 else if (node1->lot_num < node2->lot_num)
256 256 return (-1);
257 257 return (0);
258 258 }
259 259
260 260 static int
261 261 layout_hash_compare(const void *arg1, const void *arg2)
262 262 {
263 263 const sa_lot_t *node1 = arg1;
264 264 const sa_lot_t *node2 = arg2;
265 265
266 266 if (node1->lot_hash > node2->lot_hash)
267 267 return (1);
268 268 if (node1->lot_hash < node2->lot_hash)
269 269 return (-1);
270 270 if (node1->lot_instance > node2->lot_instance)
271 271 return (1);
272 272 if (node1->lot_instance < node2->lot_instance)
273 273 return (-1);
274 274 return (0);
275 275 }
276 276
277 277 boolean_t
278 278 sa_layout_equal(sa_lot_t *tbf, sa_attr_type_t *attrs, int count)
279 279 {
280 280 int i;
281 281
282 282 if (count != tbf->lot_attr_count)
283 283 return (1);
284 284
285 285 for (i = 0; i != count; i++) {
286 286 if (attrs[i] != tbf->lot_attrs[i])
287 287 return (1);
288 288 }
289 289 return (0);
290 290 }
291 291
292 292 #define SA_ATTR_HASH(attr) (zfs_crc64_table[(-1ULL ^ attr) & 0xFF])
293 293
294 294 static uint64_t
295 295 sa_layout_info_hash(sa_attr_type_t *attrs, int attr_count)
296 296 {
297 297 int i;
298 298 uint64_t crc = -1ULL;
299 299
300 300 for (i = 0; i != attr_count; i++)
301 301 crc ^= SA_ATTR_HASH(attrs[i]);
302 302
303 303 return (crc);
304 304 }
305 305
306 306 static int
307 307 sa_get_spill(sa_handle_t *hdl)
308 308 {
309 309 int rc;
310 310 if (hdl->sa_spill == NULL) {
311 311 if ((rc = dmu_spill_hold_existing(hdl->sa_bonus, NULL,
312 312 &hdl->sa_spill)) == 0)
313 313 VERIFY(0 == sa_build_index(hdl, SA_SPILL));
314 314 } else {
315 315 rc = 0;
316 316 }
317 317
318 318 return (rc);
319 319 }
320 320
321 321 /*
322 322 * Main attribute lookup/update function
323 323 * returns 0 for success or non zero for failures
324 324 *
325 325 * Operates on bulk array, first failure will abort further processing
326 326 */
327 327 int
328 328 sa_attr_op(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
329 329 sa_data_op_t data_op, dmu_tx_t *tx)
330 330 {
331 331 sa_os_t *sa = hdl->sa_os->os_sa;
332 332 int i;
333 333 int error = 0;
334 334 sa_buf_type_t buftypes;
335 335
336 336 buftypes = 0;
337 337
338 338 ASSERT(count > 0);
339 339 for (i = 0; i != count; i++) {
340 340 ASSERT(bulk[i].sa_attr <= hdl->sa_os->os_sa->sa_num_attrs);
341 341
342 342 bulk[i].sa_addr = NULL;
343 343 /* First check the bonus buffer */
344 344
345 345 if (hdl->sa_bonus_tab && TOC_ATTR_PRESENT(
346 346 hdl->sa_bonus_tab->sa_idx_tab[bulk[i].sa_attr])) {
347 347 SA_ATTR_INFO(sa, hdl->sa_bonus_tab,
348 348 SA_GET_HDR(hdl, SA_BONUS),
349 349 bulk[i].sa_attr, bulk[i], SA_BONUS, hdl);
350 350 if (tx && !(buftypes & SA_BONUS)) {
351 351 dmu_buf_will_dirty(hdl->sa_bonus, tx);
352 352 buftypes |= SA_BONUS;
353 353 }
354 354 }
355 355 if (bulk[i].sa_addr == NULL &&
356 356 ((error = sa_get_spill(hdl)) == 0)) {
357 357 if (TOC_ATTR_PRESENT(
358 358 hdl->sa_spill_tab->sa_idx_tab[bulk[i].sa_attr])) {
359 359 SA_ATTR_INFO(sa, hdl->sa_spill_tab,
360 360 SA_GET_HDR(hdl, SA_SPILL),
361 361 bulk[i].sa_attr, bulk[i], SA_SPILL, hdl);
362 362 if (tx && !(buftypes & SA_SPILL) &&
363 363 bulk[i].sa_size == bulk[i].sa_length) {
364 364 dmu_buf_will_dirty(hdl->sa_spill, tx);
365 365 buftypes |= SA_SPILL;
366 366 }
367 367 }
368 368 }
369 369 if (error && error != ENOENT) {
370 370 return ((error == ECKSUM) ? EIO : error);
371 371 }
372 372
373 373 switch (data_op) {
374 374 case SA_LOOKUP:
375 375 if (bulk[i].sa_addr == NULL)
376 376 return (SET_ERROR(ENOENT));
377 377 if (bulk[i].sa_data) {
378 378 SA_COPY_DATA(bulk[i].sa_data_func,
379 379 bulk[i].sa_addr, bulk[i].sa_data,
380 380 bulk[i].sa_size);
381 381 }
382 382 continue;
383 383
384 384 case SA_UPDATE:
385 385 /* existing rewrite of attr */
386 386 if (bulk[i].sa_addr &&
387 387 bulk[i].sa_size == bulk[i].sa_length) {
388 388 SA_COPY_DATA(bulk[i].sa_data_func,
389 389 bulk[i].sa_data, bulk[i].sa_addr,
390 390 bulk[i].sa_length);
391 391 continue;
392 392 } else if (bulk[i].sa_addr) { /* attr size change */
393 393 error = sa_modify_attrs(hdl, bulk[i].sa_attr,
394 394 SA_REPLACE, bulk[i].sa_data_func,
395 395 bulk[i].sa_data, bulk[i].sa_length, tx);
396 396 } else { /* adding new attribute */
397 397 error = sa_modify_attrs(hdl, bulk[i].sa_attr,
398 398 SA_ADD, bulk[i].sa_data_func,
399 399 bulk[i].sa_data, bulk[i].sa_length, tx);
400 400 }
401 401 if (error)
402 402 return (error);
403 403 break;
404 404 }
405 405 }
406 406 return (error);
407 407 }
408 408
409 409 static sa_lot_t *
410 410 sa_add_layout_entry(objset_t *os, sa_attr_type_t *attrs, int attr_count,
411 411 uint64_t lot_num, uint64_t hash, boolean_t zapadd, dmu_tx_t *tx)
412 412 {
413 413 sa_os_t *sa = os->os_sa;
414 414 sa_lot_t *tb, *findtb;
415 415 int i;
416 416 avl_index_t loc;
417 417
418 418 ASSERT(MUTEX_HELD(&sa->sa_lock));
419 419 tb = kmem_zalloc(sizeof (sa_lot_t), KM_SLEEP);
420 420 tb->lot_attr_count = attr_count;
421 421 tb->lot_attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
422 422 KM_SLEEP);
423 423 bcopy(attrs, tb->lot_attrs, sizeof (sa_attr_type_t) * attr_count);
424 424 tb->lot_num = lot_num;
425 425 tb->lot_hash = hash;
426 426 tb->lot_instance = 0;
427 427
428 428 if (zapadd) {
429 429 char attr_name[8];
430 430
431 431 if (sa->sa_layout_attr_obj == 0) {
432 432 sa->sa_layout_attr_obj = zap_create_link(os,
433 433 DMU_OT_SA_ATTR_LAYOUTS,
434 434 sa->sa_master_obj, SA_LAYOUTS, tx);
435 435 }
436 436
437 437 (void) snprintf(attr_name, sizeof (attr_name),
438 438 "%d", (int)lot_num);
439 439 VERIFY(0 == zap_update(os, os->os_sa->sa_layout_attr_obj,
440 440 attr_name, 2, attr_count, attrs, tx));
441 441 }
442 442
443 443 list_create(&tb->lot_idx_tab, sizeof (sa_idx_tab_t),
444 444 offsetof(sa_idx_tab_t, sa_next));
445 445
446 446 for (i = 0; i != attr_count; i++) {
447 447 if (sa->sa_attr_table[tb->lot_attrs[i]].sa_length == 0)
448 448 tb->lot_var_sizes++;
449 449 }
450 450
451 451 avl_add(&sa->sa_layout_num_tree, tb);
452 452
453 453 /* verify we don't have a hash collision */
454 454 if ((findtb = avl_find(&sa->sa_layout_hash_tree, tb, &loc)) != NULL) {
455 455 for (; findtb && findtb->lot_hash == hash;
456 456 findtb = AVL_NEXT(&sa->sa_layout_hash_tree, findtb)) {
457 457 if (findtb->lot_instance != tb->lot_instance)
458 458 break;
459 459 tb->lot_instance++;
460 460 }
461 461 }
462 462 avl_add(&sa->sa_layout_hash_tree, tb);
463 463 return (tb);
464 464 }
465 465
466 466 static void
467 467 sa_find_layout(objset_t *os, uint64_t hash, sa_attr_type_t *attrs,
468 468 int count, dmu_tx_t *tx, sa_lot_t **lot)
469 469 {
470 470 sa_lot_t *tb, tbsearch;
471 471 avl_index_t loc;
472 472 sa_os_t *sa = os->os_sa;
473 473 boolean_t found = B_FALSE;
474 474
475 475 mutex_enter(&sa->sa_lock);
476 476 tbsearch.lot_hash = hash;
477 477 tbsearch.lot_instance = 0;
478 478 tb = avl_find(&sa->sa_layout_hash_tree, &tbsearch, &loc);
479 479 if (tb) {
480 480 for (; tb && tb->lot_hash == hash;
481 481 tb = AVL_NEXT(&sa->sa_layout_hash_tree, tb)) {
482 482 if (sa_layout_equal(tb, attrs, count) == 0) {
483 483 found = B_TRUE;
484 484 break;
485 485 }
486 486 }
487 487 }
488 488 if (!found) {
489 489 tb = sa_add_layout_entry(os, attrs, count,
490 490 avl_numnodes(&sa->sa_layout_num_tree), hash, B_TRUE, tx);
491 491 }
492 492 mutex_exit(&sa->sa_lock);
493 493 *lot = tb;
494 494 }
495 495
496 496 static int
497 497 sa_resize_spill(sa_handle_t *hdl, uint32_t size, dmu_tx_t *tx)
498 498 {
499 499 int error;
500 500 uint32_t blocksize;
501 501
502 502 if (size == 0) {
503 503 blocksize = SPA_MINBLOCKSIZE;
504 504 } else if (size > SPA_MAXBLOCKSIZE) {
505 505 ASSERT(0);
506 506 return (SET_ERROR(EFBIG));
507 507 } else {
508 508 blocksize = P2ROUNDUP_TYPED(size, SPA_MINBLOCKSIZE, uint32_t);
509 509 }
510 510
511 511 error = dbuf_spill_set_blksz(hdl->sa_spill, blocksize, tx);
512 512 ASSERT(error == 0);
513 513 return (error);
514 514 }
515 515
516 516 static void
517 517 sa_copy_data(sa_data_locator_t *func, void *datastart, void *target, int buflen)
518 518 {
519 519 if (func == NULL) {
520 520 bcopy(datastart, target, buflen);
521 521 } else {
522 522 boolean_t start;
523 523 int bytes;
524 524 void *dataptr;
525 525 void *saptr = target;
526 526 uint32_t length;
527 527
528 528 start = B_TRUE;
529 529 bytes = 0;
530 530 while (bytes < buflen) {
531 531 func(&dataptr, &length, buflen, start, datastart);
532 532 bcopy(dataptr, saptr, length);
533 533 saptr = (void *)((caddr_t)saptr + length);
534 534 bytes += length;
535 535 start = B_FALSE;
536 536 }
537 537 }
538 538 }
539 539
540 540 /*
541 541 * Determine several different sizes
542 542 * first the sa header size
543 543 * the number of bytes to be stored
544 544 * if spill would occur the index in the attribute array is returned
545 545 *
546 546 * the boolean will_spill will be set when spilling is necessary. It
547 547 * is only set when the buftype is SA_BONUS
548 548 */
549 549 static int
550 550 sa_find_sizes(sa_os_t *sa, sa_bulk_attr_t *attr_desc, int attr_count,
551 551 dmu_buf_t *db, sa_buf_type_t buftype, int *index, int *total,
552 552 boolean_t *will_spill)
553 553 {
554 554 int var_size = 0;
555 555 int i;
556 556 int j = -1;
557 557 int full_space;
558 558 int hdrsize;
559 559 boolean_t done = B_FALSE;
560 560
561 561 if (buftype == SA_BONUS && sa->sa_force_spill) {
562 562 *total = 0;
563 563 *index = 0;
564 564 *will_spill = B_TRUE;
565 565 return (0);
566 566 }
567 567
568 568 *index = -1;
569 569 *total = 0;
570 570
571 571 if (buftype == SA_BONUS)
572 572 *will_spill = B_FALSE;
573 573
574 574 hdrsize = (SA_BONUSTYPE_FROM_DB(db) == DMU_OT_ZNODE) ? 0 :
575 575 sizeof (sa_hdr_phys_t);
576 576
577 577 full_space = (buftype == SA_BONUS) ? DN_MAX_BONUSLEN : db->db_size;
578 578 ASSERT(IS_P2ALIGNED(full_space, 8));
579 579
580 580 for (i = 0; i != attr_count; i++) {
581 581 boolean_t is_var_sz;
582 582
583 583 *total = P2ROUNDUP(*total, 8);
584 584 *total += attr_desc[i].sa_length;
585 585 if (done)
586 586 goto next;
587 587
588 588 is_var_sz = (SA_REGISTERED_LEN(sa, attr_desc[i].sa_attr) == 0);
589 589 if (is_var_sz) {
590 590 var_size++;
591 591 }
592 592
593 593 if (is_var_sz && var_size > 1) {
594 594 if (P2ROUNDUP(hdrsize + sizeof (uint16_t), 8) +
595 595 *total < full_space) {
596 596 /*
597 597 * Account for header space used by array of
598 598 * optional sizes of variable-length attributes.
599 599 * Record the index in case this increase needs
600 600 * to be reversed due to spill-over.
601 601 */
602 602 hdrsize += sizeof (uint16_t);
603 603 j = i;
604 604 } else {
605 605 done = B_TRUE;
606 606 *index = i;
607 607 if (buftype == SA_BONUS)
608 608 *will_spill = B_TRUE;
609 609 continue;
610 610 }
611 611 }
612 612
613 613 /*
614 614 * find index of where spill *could* occur.
615 615 * Then continue to count of remainder attribute
616 616 * space. The sum is used later for sizing bonus
617 617 * and spill buffer.
618 618 */
619 619 if (buftype == SA_BONUS && *index == -1 &&
620 620 *total + P2ROUNDUP(hdrsize, 8) >
621 621 (full_space - sizeof (blkptr_t))) {
622 622 *index = i;
623 623 done = B_TRUE;
624 624 }
625 625
626 626 next:
627 627 if (*total + P2ROUNDUP(hdrsize, 8) > full_space &&
628 628 buftype == SA_BONUS)
629 629 *will_spill = B_TRUE;
630 630 }
631 631
632 632 /*
633 633 * j holds the index of the last variable-sized attribute for
634 634 * which hdrsize was increased. Reverse the increase if that
635 635 * attribute will be relocated to the spill block.
636 636 */
637 637 if (*will_spill && j == *index)
638 638 hdrsize -= sizeof (uint16_t);
639 639
640 640 hdrsize = P2ROUNDUP(hdrsize, 8);
641 641 return (hdrsize);
642 642 }
643 643
644 644 #define BUF_SPACE_NEEDED(total, header) (total + header)
645 645
646 646 /*
647 647 * Find layout that corresponds to ordering of attributes
648 648 * If not found a new layout number is created and added to
649 649 * persistent layout tables.
650 650 */
651 651 static int
652 652 sa_build_layouts(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, int attr_count,
653 653 dmu_tx_t *tx)
654 654 {
655 655 sa_os_t *sa = hdl->sa_os->os_sa;
656 656 uint64_t hash;
657 657 sa_buf_type_t buftype;
658 658 sa_hdr_phys_t *sahdr;
659 659 void *data_start;
660 660 int buf_space;
661 661 sa_attr_type_t *attrs, *attrs_start;
662 662 int i, lot_count;
663 663 int hdrsize;
664 664 int spillhdrsize = 0;
665 665 int used;
666 666 dmu_object_type_t bonustype;
667 667 sa_lot_t *lot;
668 668 int len_idx;
669 669 int spill_used;
670 670 boolean_t spilling;
671 671
672 672 dmu_buf_will_dirty(hdl->sa_bonus, tx);
673 673 bonustype = SA_BONUSTYPE_FROM_DB(hdl->sa_bonus);
674 674
675 675 /* first determine bonus header size and sum of all attributes */
676 676 hdrsize = sa_find_sizes(sa, attr_desc, attr_count, hdl->sa_bonus,
677 677 SA_BONUS, &i, &used, &spilling);
678 678
679 679 if (used > SPA_MAXBLOCKSIZE)
680 680 return (SET_ERROR(EFBIG));
681 681
682 682 VERIFY(0 == dmu_set_bonus(hdl->sa_bonus, spilling ?
683 683 MIN(DN_MAX_BONUSLEN - sizeof (blkptr_t), used + hdrsize) :
684 684 used + hdrsize, tx));
685 685
686 686 ASSERT((bonustype == DMU_OT_ZNODE && spilling == 0) ||
687 687 bonustype == DMU_OT_SA);
688 688
689 689 /* setup and size spill buffer when needed */
690 690 if (spilling) {
691 691 boolean_t dummy;
692 692
693 693 if (hdl->sa_spill == NULL) {
694 694 VERIFY(dmu_spill_hold_by_bonus(hdl->sa_bonus, NULL,
695 695 &hdl->sa_spill) == 0);
696 696 }
697 697 dmu_buf_will_dirty(hdl->sa_spill, tx);
698 698
699 699 spillhdrsize = sa_find_sizes(sa, &attr_desc[i],
700 700 attr_count - i, hdl->sa_spill, SA_SPILL, &i,
701 701 &spill_used, &dummy);
702 702
703 703 if (spill_used > SPA_MAXBLOCKSIZE)
704 704 return (SET_ERROR(EFBIG));
705 705
706 706 buf_space = hdl->sa_spill->db_size - spillhdrsize;
707 707 if (BUF_SPACE_NEEDED(spill_used, spillhdrsize) >
708 708 hdl->sa_spill->db_size)
709 709 VERIFY(0 == sa_resize_spill(hdl,
710 710 BUF_SPACE_NEEDED(spill_used, spillhdrsize), tx));
711 711 }
712 712
713 713 /* setup starting pointers to lay down data */
714 714 data_start = (void *)((uintptr_t)hdl->sa_bonus->db_data + hdrsize);
715 715 sahdr = (sa_hdr_phys_t *)hdl->sa_bonus->db_data;
716 716 buftype = SA_BONUS;
717 717
718 718 if (spilling)
719 719 buf_space = (sa->sa_force_spill) ?
720 720 0 : SA_BLKPTR_SPACE - hdrsize;
721 721 else
722 722 buf_space = hdl->sa_bonus->db_size - hdrsize;
723 723
724 724 attrs_start = attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
725 725 KM_SLEEP);
726 726 lot_count = 0;
727 727
728 728 for (i = 0, len_idx = 0, hash = -1ULL; i != attr_count; i++) {
729 729 uint16_t length;
730 730
731 731 ASSERT(IS_P2ALIGNED(data_start, 8));
732 732 ASSERT(IS_P2ALIGNED(buf_space, 8));
733 733 attrs[i] = attr_desc[i].sa_attr;
734 734 length = SA_REGISTERED_LEN(sa, attrs[i]);
735 735 if (length == 0)
736 736 length = attr_desc[i].sa_length;
737 737
738 738 if (buf_space < length) { /* switch to spill buffer */
739 739 VERIFY(spilling);
740 740 VERIFY(bonustype == DMU_OT_SA);
741 741 if (buftype == SA_BONUS && !sa->sa_force_spill) {
742 742 sa_find_layout(hdl->sa_os, hash, attrs_start,
743 743 lot_count, tx, &lot);
744 744 SA_SET_HDR(sahdr, lot->lot_num, hdrsize);
745 745 }
746 746
747 747 buftype = SA_SPILL;
748 748 hash = -1ULL;
749 749 len_idx = 0;
750 750
751 751 sahdr = (sa_hdr_phys_t *)hdl->sa_spill->db_data;
752 752 sahdr->sa_magic = SA_MAGIC;
753 753 data_start = (void *)((uintptr_t)sahdr +
754 754 spillhdrsize);
755 755 attrs_start = &attrs[i];
756 756 buf_space = hdl->sa_spill->db_size - spillhdrsize;
757 757 lot_count = 0;
758 758 }
759 759 hash ^= SA_ATTR_HASH(attrs[i]);
760 760 attr_desc[i].sa_addr = data_start;
761 761 attr_desc[i].sa_size = length;
762 762 SA_COPY_DATA(attr_desc[i].sa_data_func, attr_desc[i].sa_data,
763 763 data_start, length);
764 764 if (sa->sa_attr_table[attrs[i]].sa_length == 0) {
765 765 sahdr->sa_lengths[len_idx++] = length;
766 766 }
767 767 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
768 768 length), 8);
769 769 buf_space -= P2ROUNDUP(length, 8);
770 770 lot_count++;
771 771 }
772 772
773 773 sa_find_layout(hdl->sa_os, hash, attrs_start, lot_count, tx, &lot);
774 774
775 775 /*
776 776 * Verify that old znodes always have layout number 0.
777 777 * Must be DMU_OT_SA for arbitrary layouts
778 778 */
779 779 VERIFY((bonustype == DMU_OT_ZNODE && lot->lot_num == 0) ||
780 780 (bonustype == DMU_OT_SA && lot->lot_num > 1));
781 781
782 782 if (bonustype == DMU_OT_SA) {
783 783 SA_SET_HDR(sahdr, lot->lot_num,
784 784 buftype == SA_BONUS ? hdrsize : spillhdrsize);
785 785 }
786 786
787 787 kmem_free(attrs, sizeof (sa_attr_type_t) * attr_count);
788 788 if (hdl->sa_bonus_tab) {
789 789 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
790 790 hdl->sa_bonus_tab = NULL;
791 791 }
792 792 if (!sa->sa_force_spill)
793 793 VERIFY(0 == sa_build_index(hdl, SA_BONUS));
794 794 if (hdl->sa_spill) {
795 795 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
796 796 if (!spilling) {
797 797 /*
798 798 * remove spill block that is no longer needed.
799 799 */
800 800 dmu_buf_rele(hdl->sa_spill, NULL);
801 801 hdl->sa_spill = NULL;
802 802 hdl->sa_spill_tab = NULL;
803 803 VERIFY(0 == dmu_rm_spill(hdl->sa_os,
804 804 sa_handle_object(hdl), tx));
805 805 } else {
806 806 VERIFY(0 == sa_build_index(hdl, SA_SPILL));
807 807 }
808 808 }
809 809
810 810 return (0);
811 811 }
812 812
813 813 static void
814 814 sa_free_attr_table(sa_os_t *sa)
815 815 {
816 816 int i;
817 817
818 818 if (sa->sa_attr_table == NULL)
819 819 return;
820 820
821 821 for (i = 0; i != sa->sa_num_attrs; i++) {
822 822 if (sa->sa_attr_table[i].sa_name)
823 823 kmem_free(sa->sa_attr_table[i].sa_name,
824 824 strlen(sa->sa_attr_table[i].sa_name) + 1);
825 825 }
826 826
827 827 kmem_free(sa->sa_attr_table,
828 828 sizeof (sa_attr_table_t) * sa->sa_num_attrs);
829 829
830 830 sa->sa_attr_table = NULL;
831 831 }
832 832
833 833 static int
834 834 sa_attr_table_setup(objset_t *os, sa_attr_reg_t *reg_attrs, int count)
835 835 {
836 836 sa_os_t *sa = os->os_sa;
837 837 uint64_t sa_attr_count = 0;
838 838 uint64_t sa_reg_count = 0;
839 839 int error = 0;
840 840 uint64_t attr_value;
841 841 sa_attr_table_t *tb;
842 842 zap_cursor_t zc;
843 843 zap_attribute_t za;
844 844 int registered_count = 0;
845 845 int i;
846 846 dmu_objset_type_t ostype = dmu_objset_type(os);
847 847
848 848 sa->sa_user_table =
849 849 kmem_zalloc(count * sizeof (sa_attr_type_t), KM_SLEEP);
850 850 sa->sa_user_table_sz = count * sizeof (sa_attr_type_t);
851 851
852 852 if (sa->sa_reg_attr_obj != 0) {
853 853 error = zap_count(os, sa->sa_reg_attr_obj,
854 854 &sa_attr_count);
855 855
856 856 /*
857 857 * Make sure we retrieved a count and that it isn't zero
858 858 */
859 859 if (error || (error == 0 && sa_attr_count == 0)) {
860 860 if (error == 0)
861 861 error = SET_ERROR(EINVAL);
862 862 goto bail;
863 863 }
864 864 sa_reg_count = sa_attr_count;
865 865 }
866 866
867 867 if (ostype == DMU_OST_ZFS && sa_attr_count == 0)
868 868 sa_attr_count += sa_legacy_attr_count;
869 869
870 870 /* Allocate attribute numbers for attributes that aren't registered */
871 871 for (i = 0; i != count; i++) {
872 872 boolean_t found = B_FALSE;
873 873 int j;
874 874
875 875 if (ostype == DMU_OST_ZFS) {
876 876 for (j = 0; j != sa_legacy_attr_count; j++) {
877 877 if (strcmp(reg_attrs[i].sa_name,
878 878 sa_legacy_attrs[j].sa_name) == 0) {
879 879 sa->sa_user_table[i] =
880 880 sa_legacy_attrs[j].sa_attr;
881 881 found = B_TRUE;
882 882 }
883 883 }
884 884 }
885 885 if (found)
886 886 continue;
887 887
888 888 if (sa->sa_reg_attr_obj)
889 889 error = zap_lookup(os, sa->sa_reg_attr_obj,
890 890 reg_attrs[i].sa_name, 8, 1, &attr_value);
891 891 else
892 892 error = SET_ERROR(ENOENT);
893 893 switch (error) {
894 894 case ENOENT:
895 895 sa->sa_user_table[i] = (sa_attr_type_t)sa_attr_count;
896 896 sa_attr_count++;
897 897 break;
898 898 case 0:
899 899 sa->sa_user_table[i] = ATTR_NUM(attr_value);
900 900 break;
901 901 default:
902 902 goto bail;
903 903 }
904 904 }
905 905
906 906 sa->sa_num_attrs = sa_attr_count;
907 907 tb = sa->sa_attr_table =
908 908 kmem_zalloc(sizeof (sa_attr_table_t) * sa_attr_count, KM_SLEEP);
909 909
910 910 /*
911 911 * Attribute table is constructed from requested attribute list,
912 912 * previously foreign registered attributes, and also the legacy
913 913 * ZPL set of attributes.
914 914 */
915 915
916 916 if (sa->sa_reg_attr_obj) {
917 917 for (zap_cursor_init(&zc, os, sa->sa_reg_attr_obj);
918 918 (error = zap_cursor_retrieve(&zc, &za)) == 0;
919 919 zap_cursor_advance(&zc)) {
920 920 uint64_t value;
921 921 value = za.za_first_integer;
922 922
923 923 registered_count++;
924 924 tb[ATTR_NUM(value)].sa_attr = ATTR_NUM(value);
925 925 tb[ATTR_NUM(value)].sa_length = ATTR_LENGTH(value);
926 926 tb[ATTR_NUM(value)].sa_byteswap = ATTR_BSWAP(value);
927 927 tb[ATTR_NUM(value)].sa_registered = B_TRUE;
928 928
929 929 if (tb[ATTR_NUM(value)].sa_name) {
930 930 continue;
931 931 }
932 932 tb[ATTR_NUM(value)].sa_name =
933 933 kmem_zalloc(strlen(za.za_name) +1, KM_SLEEP);
934 934 (void) strlcpy(tb[ATTR_NUM(value)].sa_name, za.za_name,
935 935 strlen(za.za_name) +1);
936 936 }
937 937 zap_cursor_fini(&zc);
938 938 /*
939 939 * Make sure we processed the correct number of registered
940 940 * attributes
941 941 */
942 942 if (registered_count != sa_reg_count) {
943 943 ASSERT(error != 0);
944 944 goto bail;
945 945 }
946 946
947 947 }
948 948
949 949 if (ostype == DMU_OST_ZFS) {
950 950 for (i = 0; i != sa_legacy_attr_count; i++) {
951 951 if (tb[i].sa_name)
952 952 continue;
953 953 tb[i].sa_attr = sa_legacy_attrs[i].sa_attr;
954 954 tb[i].sa_length = sa_legacy_attrs[i].sa_length;
955 955 tb[i].sa_byteswap = sa_legacy_attrs[i].sa_byteswap;
956 956 tb[i].sa_registered = B_FALSE;
957 957 tb[i].sa_name =
958 958 kmem_zalloc(strlen(sa_legacy_attrs[i].sa_name) +1,
959 959 KM_SLEEP);
960 960 (void) strlcpy(tb[i].sa_name,
961 961 sa_legacy_attrs[i].sa_name,
962 962 strlen(sa_legacy_attrs[i].sa_name) + 1);
963 963 }
964 964 }
965 965
966 966 for (i = 0; i != count; i++) {
967 967 sa_attr_type_t attr_id;
968 968
969 969 attr_id = sa->sa_user_table[i];
970 970 if (tb[attr_id].sa_name)
971 971 continue;
972 972
973 973 tb[attr_id].sa_length = reg_attrs[i].sa_length;
974 974 tb[attr_id].sa_byteswap = reg_attrs[i].sa_byteswap;
975 975 tb[attr_id].sa_attr = attr_id;
976 976 tb[attr_id].sa_name =
977 977 kmem_zalloc(strlen(reg_attrs[i].sa_name) + 1, KM_SLEEP);
978 978 (void) strlcpy(tb[attr_id].sa_name, reg_attrs[i].sa_name,
979 979 strlen(reg_attrs[i].sa_name) + 1);
980 980 }
981 981
982 982 sa->sa_need_attr_registration =
983 983 (sa_attr_count != registered_count);
984 984
985 985 return (0);
986 986 bail:
987 987 kmem_free(sa->sa_user_table, count * sizeof (sa_attr_type_t));
988 988 sa->sa_user_table = NULL;
989 989 sa_free_attr_table(sa);
990 990 return ((error != 0) ? error : EINVAL);
991 991 }
992 992
993 993 int
994 994 sa_setup(objset_t *os, uint64_t sa_obj, sa_attr_reg_t *reg_attrs, int count,
995 995 sa_attr_type_t **user_table)
996 996 {
997 997 zap_cursor_t zc;
998 998 zap_attribute_t za;
999 999 sa_os_t *sa;
1000 1000 dmu_objset_type_t ostype = dmu_objset_type(os);
1001 1001 sa_attr_type_t *tb;
1002 1002 int error;
1003 1003
1004 1004 mutex_enter(&os->os_user_ptr_lock);
1005 1005 if (os->os_sa) {
1006 1006 mutex_enter(&os->os_sa->sa_lock);
1007 1007 mutex_exit(&os->os_user_ptr_lock);
1008 1008 tb = os->os_sa->sa_user_table;
1009 1009 mutex_exit(&os->os_sa->sa_lock);
1010 1010 *user_table = tb;
1011 1011 return (0);
1012 1012 }
1013 1013
1014 1014 sa = kmem_zalloc(sizeof (sa_os_t), KM_SLEEP);
1015 1015 mutex_init(&sa->sa_lock, NULL, MUTEX_DEFAULT, NULL);
1016 1016 sa->sa_master_obj = sa_obj;
1017 1017
1018 1018 os->os_sa = sa;
1019 1019 mutex_enter(&sa->sa_lock);
1020 1020 mutex_exit(&os->os_user_ptr_lock);
1021 1021 avl_create(&sa->sa_layout_num_tree, layout_num_compare,
1022 1022 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_num_node));
1023 1023 avl_create(&sa->sa_layout_hash_tree, layout_hash_compare,
1024 1024 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_hash_node));
1025 1025
1026 1026 if (sa_obj) {
1027 1027 error = zap_lookup(os, sa_obj, SA_LAYOUTS,
1028 1028 8, 1, &sa->sa_layout_attr_obj);
1029 1029 if (error != 0 && error != ENOENT)
1030 1030 goto fail;
1031 1031 error = zap_lookup(os, sa_obj, SA_REGISTRY,
1032 1032 8, 1, &sa->sa_reg_attr_obj);
1033 1033 if (error != 0 && error != ENOENT)
1034 1034 goto fail;
1035 1035 }
1036 1036
1037 1037 if ((error = sa_attr_table_setup(os, reg_attrs, count)) != 0)
1038 1038 goto fail;
1039 1039
1040 1040 if (sa->sa_layout_attr_obj != 0) {
1041 1041 uint64_t layout_count;
1042 1042
1043 1043 error = zap_count(os, sa->sa_layout_attr_obj,
1044 1044 &layout_count);
1045 1045
1046 1046 /*
1047 1047 * Layout number count should be > 0
1048 1048 */
1049 1049 if (error || (error == 0 && layout_count == 0)) {
1050 1050 if (error == 0)
1051 1051 error = SET_ERROR(EINVAL);
1052 1052 goto fail;
1053 1053 }
1054 1054
1055 1055 for (zap_cursor_init(&zc, os, sa->sa_layout_attr_obj);
1056 1056 (error = zap_cursor_retrieve(&zc, &za)) == 0;
1057 1057 zap_cursor_advance(&zc)) {
1058 1058 sa_attr_type_t *lot_attrs;
1059 1059 uint64_t lot_num;
1060 1060
1061 1061 lot_attrs = kmem_zalloc(sizeof (sa_attr_type_t) *
1062 1062 za.za_num_integers, KM_SLEEP);
1063 1063
1064 1064 if ((error = (zap_lookup(os, sa->sa_layout_attr_obj,
1065 1065 za.za_name, 2, za.za_num_integers,
1066 1066 lot_attrs))) != 0) {
1067 1067 kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
1068 1068 za.za_num_integers);
1069 1069 break;
1070 1070 }
1071 1071 VERIFY(ddi_strtoull(za.za_name, NULL, 10,
1072 1072 (unsigned long long *)&lot_num) == 0);
1073 1073
1074 1074 (void) sa_add_layout_entry(os, lot_attrs,
1075 1075 za.za_num_integers, lot_num,
1076 1076 sa_layout_info_hash(lot_attrs,
1077 1077 za.za_num_integers), B_FALSE, NULL);
1078 1078 kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
1079 1079 za.za_num_integers);
1080 1080 }
1081 1081 zap_cursor_fini(&zc);
1082 1082
1083 1083 /*
1084 1084 * Make sure layout count matches number of entries added
1085 1085 * to AVL tree
1086 1086 */
1087 1087 if (avl_numnodes(&sa->sa_layout_num_tree) != layout_count) {
1088 1088 ASSERT(error != 0);
1089 1089 goto fail;
1090 1090 }
1091 1091 }
1092 1092
1093 1093 /* Add special layout number for old ZNODES */
1094 1094 if (ostype == DMU_OST_ZFS) {
1095 1095 (void) sa_add_layout_entry(os, sa_legacy_zpl_layout,
1096 1096 sa_legacy_attr_count, 0,
1097 1097 sa_layout_info_hash(sa_legacy_zpl_layout,
1098 1098 sa_legacy_attr_count), B_FALSE, NULL);
1099 1099
1100 1100 (void) sa_add_layout_entry(os, sa_dummy_zpl_layout, 0, 1,
1101 1101 0, B_FALSE, NULL);
1102 1102 }
1103 1103 *user_table = os->os_sa->sa_user_table;
1104 1104 mutex_exit(&sa->sa_lock);
1105 1105 return (0);
1106 1106 fail:
1107 1107 os->os_sa = NULL;
1108 1108 sa_free_attr_table(sa);
1109 1109 if (sa->sa_user_table)
1110 1110 kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
1111 1111 mutex_exit(&sa->sa_lock);
1112 1112 kmem_free(sa, sizeof (sa_os_t));
1113 1113 return ((error == ECKSUM) ? EIO : error);
1114 1114 }
1115 1115
1116 1116 void
1117 1117 sa_tear_down(objset_t *os)
1118 1118 {
1119 1119 sa_os_t *sa = os->os_sa;
1120 1120 sa_lot_t *layout;
1121 1121 void *cookie;
1122 1122
1123 1123 kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
1124 1124
1125 1125 /* Free up attr table */
1126 1126
1127 1127 sa_free_attr_table(sa);
1128 1128
1129 1129 cookie = NULL;
1130 1130 while (layout = avl_destroy_nodes(&sa->sa_layout_hash_tree, &cookie)) {
1131 1131 sa_idx_tab_t *tab;
1132 1132 while (tab = list_head(&layout->lot_idx_tab)) {
1133 1133 ASSERT(refcount_count(&tab->sa_refcount));
1134 1134 sa_idx_tab_rele(os, tab);
1135 1135 }
1136 1136 }
1137 1137
1138 1138 cookie = NULL;
1139 1139 while (layout = avl_destroy_nodes(&sa->sa_layout_num_tree, &cookie)) {
1140 1140 kmem_free(layout->lot_attrs,
1141 1141 sizeof (sa_attr_type_t) * layout->lot_attr_count);
1142 1142 kmem_free(layout, sizeof (sa_lot_t));
1143 1143 }
1144 1144
1145 1145 avl_destroy(&sa->sa_layout_hash_tree);
1146 1146 avl_destroy(&sa->sa_layout_num_tree);
1147 1147
1148 1148 kmem_free(sa, sizeof (sa_os_t));
1149 1149 os->os_sa = NULL;
1150 1150 }
1151 1151
1152 1152 void
1153 1153 sa_build_idx_tab(void *hdr, void *attr_addr, sa_attr_type_t attr,
1154 1154 uint16_t length, int length_idx, boolean_t var_length, void *userp)
1155 1155 {
1156 1156 sa_idx_tab_t *idx_tab = userp;
1157 1157
1158 1158 if (var_length) {
1159 1159 ASSERT(idx_tab->sa_variable_lengths);
1160 1160 idx_tab->sa_variable_lengths[length_idx] = length;
1161 1161 }
1162 1162 TOC_ATTR_ENCODE(idx_tab->sa_idx_tab[attr], length_idx,
1163 1163 (uint32_t)((uintptr_t)attr_addr - (uintptr_t)hdr));
1164 1164 }
1165 1165
1166 1166 static void
1167 1167 sa_attr_iter(objset_t *os, sa_hdr_phys_t *hdr, dmu_object_type_t type,
1168 1168 sa_iterfunc_t func, sa_lot_t *tab, void *userp)
1169 1169 {
1170 1170 void *data_start;
1171 1171 sa_lot_t *tb = tab;
1172 1172 sa_lot_t search;
1173 1173 avl_index_t loc;
1174 1174 sa_os_t *sa = os->os_sa;
1175 1175 int i;
1176 1176 uint16_t *length_start = NULL;
1177 1177 uint8_t length_idx = 0;
1178 1178
1179 1179 if (tab == NULL) {
1180 1180 search.lot_num = SA_LAYOUT_NUM(hdr, type);
1181 1181 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
1182 1182 ASSERT(tb);
1183 1183 }
1184 1184
1185 1185 if (IS_SA_BONUSTYPE(type)) {
1186 1186 data_start = (void *)P2ROUNDUP(((uintptr_t)hdr +
1187 1187 offsetof(sa_hdr_phys_t, sa_lengths) +
1188 1188 (sizeof (uint16_t) * tb->lot_var_sizes)), 8);
1189 1189 length_start = hdr->sa_lengths;
1190 1190 } else {
1191 1191 data_start = hdr;
1192 1192 }
1193 1193
1194 1194 for (i = 0; i != tb->lot_attr_count; i++) {
1195 1195 int attr_length, reg_length;
1196 1196 uint8_t idx_len;
1197 1197
1198 1198 reg_length = sa->sa_attr_table[tb->lot_attrs[i]].sa_length;
1199 1199 if (reg_length) {
1200 1200 attr_length = reg_length;
1201 1201 idx_len = 0;
1202 1202 } else {
1203 1203 attr_length = length_start[length_idx];
1204 1204 idx_len = length_idx++;
1205 1205 }
1206 1206
1207 1207 func(hdr, data_start, tb->lot_attrs[i], attr_length,
1208 1208 idx_len, reg_length == 0 ? B_TRUE : B_FALSE, userp);
1209 1209
1210 1210 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
1211 1211 attr_length), 8);
1212 1212 }
1213 1213 }
1214 1214
1215 1215 /*ARGSUSED*/
1216 1216 void
1217 1217 sa_byteswap_cb(void *hdr, void *attr_addr, sa_attr_type_t attr,
1218 1218 uint16_t length, int length_idx, boolean_t variable_length, void *userp)
1219 1219 {
1220 1220 sa_handle_t *hdl = userp;
1221 1221 sa_os_t *sa = hdl->sa_os->os_sa;
1222 1222
1223 1223 sa_bswap_table[sa->sa_attr_table[attr].sa_byteswap](attr_addr, length);
1224 1224 }
1225 1225
1226 1226 void
1227 1227 sa_byteswap(sa_handle_t *hdl, sa_buf_type_t buftype)
1228 1228 {
1229 1229 sa_hdr_phys_t *sa_hdr_phys = SA_GET_HDR(hdl, buftype);
1230 1230 dmu_buf_impl_t *db;
1231 1231 sa_os_t *sa = hdl->sa_os->os_sa;
1232 1232 int num_lengths = 1;
1233 1233 int i;
1234 1234
1235 1235 ASSERT(MUTEX_HELD(&sa->sa_lock));
1236 1236 if (sa_hdr_phys->sa_magic == SA_MAGIC)
1237 1237 return;
1238 1238
1239 1239 db = SA_GET_DB(hdl, buftype);
1240 1240
1241 1241 if (buftype == SA_SPILL) {
1242 1242 arc_release(db->db_buf, NULL);
1243 1243 arc_buf_thaw(db->db_buf);
1244 1244 }
1245 1245
1246 1246 sa_hdr_phys->sa_magic = BSWAP_32(sa_hdr_phys->sa_magic);
1247 1247 sa_hdr_phys->sa_layout_info = BSWAP_16(sa_hdr_phys->sa_layout_info);
1248 1248
1249 1249 /*
1250 1250 * Determine number of variable lenghts in header
1251 1251 * The standard 8 byte header has one for free and a
1252 1252 * 16 byte header would have 4 + 1;
1253 1253 */
1254 1254 if (SA_HDR_SIZE(sa_hdr_phys) > 8)
1255 1255 num_lengths += (SA_HDR_SIZE(sa_hdr_phys) - 8) >> 1;
1256 1256 for (i = 0; i != num_lengths; i++)
1257 1257 sa_hdr_phys->sa_lengths[i] =
1258 1258 BSWAP_16(sa_hdr_phys->sa_lengths[i]);
1259 1259
1260 1260 sa_attr_iter(hdl->sa_os, sa_hdr_phys, DMU_OT_SA,
1261 1261 sa_byteswap_cb, NULL, hdl);
1262 1262
1263 1263 if (buftype == SA_SPILL)
1264 1264 arc_buf_freeze(((dmu_buf_impl_t *)hdl->sa_spill)->db_buf);
1265 1265 }
1266 1266
1267 1267 static int
1268 1268 sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype)
1269 1269 {
1270 1270 sa_hdr_phys_t *sa_hdr_phys;
1271 1271 dmu_buf_impl_t *db = SA_GET_DB(hdl, buftype);
1272 1272 dmu_object_type_t bonustype = SA_BONUSTYPE_FROM_DB(db);
1273 1273 sa_os_t *sa = hdl->sa_os->os_sa;
1274 1274 sa_idx_tab_t *idx_tab;
1275 1275
1276 1276 sa_hdr_phys = SA_GET_HDR(hdl, buftype);
1277 1277
1278 1278 mutex_enter(&sa->sa_lock);
1279 1279
1280 1280 /* Do we need to byteswap? */
1281 1281
1282 1282 /* only check if not old znode */
1283 1283 if (IS_SA_BONUSTYPE(bonustype) && sa_hdr_phys->sa_magic != SA_MAGIC &&
1284 1284 sa_hdr_phys->sa_magic != 0) {
1285 1285 VERIFY(BSWAP_32(sa_hdr_phys->sa_magic) == SA_MAGIC);
1286 1286 sa_byteswap(hdl, buftype);
1287 1287 }
1288 1288
1289 1289 idx_tab = sa_find_idx_tab(hdl->sa_os, bonustype, sa_hdr_phys);
1290 1290
1291 1291 if (buftype == SA_BONUS)
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1292 1292 hdl->sa_bonus_tab = idx_tab;
1293 1293 else
1294 1294 hdl->sa_spill_tab = idx_tab;
1295 1295
1296 1296 mutex_exit(&sa->sa_lock);
1297 1297 return (0);
1298 1298 }
1299 1299
1300 1300 /*ARGSUSED*/
1301 1301 void
1302 -sa_evict(dmu_buf_t *db, void *sap)
1302 +sa_evict(dmu_buf_user_t *dbu)
1303 1303 {
1304 - panic("evicting sa dbuf %p\n", (void *)db);
1304 + panic("evicting sa dbuf\n");
1305 1305 }
1306 1306
1307 1307 static void
1308 1308 sa_idx_tab_rele(objset_t *os, void *arg)
1309 1309 {
1310 1310 sa_os_t *sa = os->os_sa;
1311 1311 sa_idx_tab_t *idx_tab = arg;
1312 1312
1313 1313 if (idx_tab == NULL)
1314 1314 return;
1315 1315
1316 1316 mutex_enter(&sa->sa_lock);
1317 1317 if (refcount_remove(&idx_tab->sa_refcount, NULL) == 0) {
1318 1318 list_remove(&idx_tab->sa_layout->lot_idx_tab, idx_tab);
1319 1319 if (idx_tab->sa_variable_lengths)
1320 1320 kmem_free(idx_tab->sa_variable_lengths,
1321 1321 sizeof (uint16_t) *
1322 1322 idx_tab->sa_layout->lot_var_sizes);
1323 1323 refcount_destroy(&idx_tab->sa_refcount);
1324 1324 kmem_free(idx_tab->sa_idx_tab,
1325 1325 sizeof (uint32_t) * sa->sa_num_attrs);
1326 1326 kmem_free(idx_tab, sizeof (sa_idx_tab_t));
1327 1327 }
1328 1328 mutex_exit(&sa->sa_lock);
1329 1329 }
1330 1330
1331 1331 static void
1332 1332 sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab)
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1333 1333 {
1334 1334 sa_os_t *sa = os->os_sa;
1335 1335
1336 1336 ASSERT(MUTEX_HELD(&sa->sa_lock));
1337 1337 (void) refcount_add(&idx_tab->sa_refcount, NULL);
1338 1338 }
1339 1339
1340 1340 void
1341 1341 sa_handle_destroy(sa_handle_t *hdl)
1342 1342 {
1343 + dmu_buf_t *db = hdl->sa_bonus;
1344 +
1343 1345 mutex_enter(&hdl->sa_lock);
1344 - (void) dmu_buf_update_user((dmu_buf_t *)hdl->sa_bonus, hdl,
1345 - NULL, NULL, NULL);
1346 + (void) dmu_buf_remove_user(db, &hdl->db_evict);
1346 1347
1347 1348 if (hdl->sa_bonus_tab) {
1348 1349 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
1349 1350 hdl->sa_bonus_tab = NULL;
1350 1351 }
1351 1352 if (hdl->sa_spill_tab) {
1352 1353 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
1353 1354 hdl->sa_spill_tab = NULL;
1354 1355 }
1355 1356
1356 1357 dmu_buf_rele(hdl->sa_bonus, NULL);
1357 1358
1358 1359 if (hdl->sa_spill)
1359 1360 dmu_buf_rele((dmu_buf_t *)hdl->sa_spill, NULL);
1360 1361 mutex_exit(&hdl->sa_lock);
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1361 1362
1362 1363 kmem_cache_free(sa_cache, hdl);
1363 1364 }
1364 1365
1365 1366 int
1366 1367 sa_handle_get_from_db(objset_t *os, dmu_buf_t *db, void *userp,
1367 1368 sa_handle_type_t hdl_type, sa_handle_t **handlepp)
1368 1369 {
1369 1370 int error = 0;
1370 1371 dmu_object_info_t doi;
1371 - sa_handle_t *handle;
1372 + sa_handle_t *handle = NULL;
1372 1373
1373 1374 #ifdef ZFS_DEBUG
1374 1375 dmu_object_info_from_db(db, &doi);
1375 1376 ASSERT(doi.doi_bonus_type == DMU_OT_SA ||
1376 1377 doi.doi_bonus_type == DMU_OT_ZNODE);
1377 1378 #endif
1378 1379 /* find handle, if it exists */
1379 1380 /* if one doesn't exist then create a new one, and initialize it */
1380 1381
1381 - handle = (hdl_type == SA_HDL_SHARED) ? dmu_buf_get_user(db) : NULL;
1382 + if (hdl_type == SA_HDL_SHARED)
1383 + handle = (sa_handle_t *)dmu_buf_get_user(db);
1384 +
1382 1385 if (handle == NULL) {
1383 - sa_handle_t *newhandle;
1386 + sa_handle_t *winner = NULL;
1387 +
1388 + bzero(&handle->db_evict, sizeof(dmu_buf_user_t));
1384 1389 handle = kmem_cache_alloc(sa_cache, KM_SLEEP);
1385 1390 handle->sa_userp = userp;
1386 1391 handle->sa_bonus = db;
1387 1392 handle->sa_os = os;
1388 1393 handle->sa_spill = NULL;
1389 1394
1390 1395 error = sa_build_index(handle, SA_BONUS);
1391 - newhandle = (hdl_type == SA_HDL_SHARED) ?
1392 - dmu_buf_set_user_ie(db, handle,
1393 - NULL, sa_evict) : NULL;
1394 -
1395 - if (newhandle != NULL) {
1396 + if (hdl_type == SA_HDL_SHARED) {
1397 + dmu_buf_init_user(&handle->db_evict, sa_evict);
1398 + winner = (sa_handle_t *)
1399 + dmu_buf_set_user_ie(db, &handle->db_evict);
1400 + }
1401 + if (winner != NULL) {
1396 1402 kmem_cache_free(sa_cache, handle);
1397 - handle = newhandle;
1403 + handle = winner;
1398 1404 }
1399 1405 }
1400 1406 *handlepp = handle;
1401 1407
1402 1408 return (error);
1403 1409 }
1404 1410
1405 1411 int
1406 1412 sa_handle_get(objset_t *objset, uint64_t objid, void *userp,
1407 1413 sa_handle_type_t hdl_type, sa_handle_t **handlepp)
1408 1414 {
1409 1415 dmu_buf_t *db;
1410 1416 int error;
1411 1417
1412 1418 if (error = dmu_bonus_hold(objset, objid, NULL, &db))
1413 1419 return (error);
1414 1420
1415 1421 return (sa_handle_get_from_db(objset, db, userp, hdl_type,
1416 1422 handlepp));
1417 1423 }
1418 1424
1419 1425 int
1420 1426 sa_buf_hold(objset_t *objset, uint64_t obj_num, void *tag, dmu_buf_t **db)
1421 1427 {
1422 1428 return (dmu_bonus_hold(objset, obj_num, tag, db));
1423 1429 }
1424 1430
1425 1431 void
1426 1432 sa_buf_rele(dmu_buf_t *db, void *tag)
1427 1433 {
1428 1434 dmu_buf_rele(db, tag);
1429 1435 }
1430 1436
1431 1437 int
1432 1438 sa_lookup_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count)
1433 1439 {
1434 1440 ASSERT(hdl);
1435 1441 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1436 1442 return (sa_attr_op(hdl, bulk, count, SA_LOOKUP, NULL));
1437 1443 }
1438 1444
1439 1445 int
1440 1446 sa_lookup(sa_handle_t *hdl, sa_attr_type_t attr, void *buf, uint32_t buflen)
1441 1447 {
1442 1448 int error;
1443 1449 sa_bulk_attr_t bulk;
1444 1450
1445 1451 bulk.sa_attr = attr;
1446 1452 bulk.sa_data = buf;
1447 1453 bulk.sa_length = buflen;
1448 1454 bulk.sa_data_func = NULL;
1449 1455
1450 1456 ASSERT(hdl);
1451 1457 mutex_enter(&hdl->sa_lock);
1452 1458 error = sa_lookup_impl(hdl, &bulk, 1);
1453 1459 mutex_exit(&hdl->sa_lock);
1454 1460 return (error);
1455 1461 }
1456 1462
1457 1463 #ifdef _KERNEL
1458 1464 int
1459 1465 sa_lookup_uio(sa_handle_t *hdl, sa_attr_type_t attr, uio_t *uio)
1460 1466 {
1461 1467 int error;
1462 1468 sa_bulk_attr_t bulk;
1463 1469
1464 1470 bulk.sa_data = NULL;
1465 1471 bulk.sa_attr = attr;
1466 1472 bulk.sa_data_func = NULL;
1467 1473
1468 1474 ASSERT(hdl);
1469 1475
1470 1476 mutex_enter(&hdl->sa_lock);
1471 1477 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) == 0) {
1472 1478 error = uiomove((void *)bulk.sa_addr, MIN(bulk.sa_size,
1473 1479 uio->uio_resid), UIO_READ, uio);
1474 1480 }
1475 1481 mutex_exit(&hdl->sa_lock);
1476 1482 return (error);
1477 1483
1478 1484 }
1479 1485 #endif
1480 1486
1481 1487 void *
1482 1488 sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype, void *data)
1483 1489 {
1484 1490 sa_idx_tab_t *idx_tab;
1485 1491 sa_hdr_phys_t *hdr = (sa_hdr_phys_t *)data;
1486 1492 sa_os_t *sa = os->os_sa;
1487 1493 sa_lot_t *tb, search;
1488 1494 avl_index_t loc;
1489 1495
1490 1496 /*
1491 1497 * Deterimine layout number. If SA node and header == 0 then
1492 1498 * force the index table to the dummy "1" empty layout.
1493 1499 *
1494 1500 * The layout number would only be zero for a newly created file
1495 1501 * that has not added any attributes yet, or with crypto enabled which
1496 1502 * doesn't write any attributes to the bonus buffer.
1497 1503 */
1498 1504
1499 1505 search.lot_num = SA_LAYOUT_NUM(hdr, bonustype);
1500 1506
1501 1507 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
1502 1508
1503 1509 /* Verify header size is consistent with layout information */
1504 1510 ASSERT(tb);
1505 1511 ASSERT(IS_SA_BONUSTYPE(bonustype) &&
1506 1512 SA_HDR_SIZE_MATCH_LAYOUT(hdr, tb) || !IS_SA_BONUSTYPE(bonustype) ||
1507 1513 (IS_SA_BONUSTYPE(bonustype) && hdr->sa_layout_info == 0));
1508 1514
1509 1515 /*
1510 1516 * See if any of the already existing TOC entries can be reused?
1511 1517 */
1512 1518
1513 1519 for (idx_tab = list_head(&tb->lot_idx_tab); idx_tab;
1514 1520 idx_tab = list_next(&tb->lot_idx_tab, idx_tab)) {
1515 1521 boolean_t valid_idx = B_TRUE;
1516 1522 int i;
1517 1523
1518 1524 if (tb->lot_var_sizes != 0 &&
1519 1525 idx_tab->sa_variable_lengths != NULL) {
1520 1526 for (i = 0; i != tb->lot_var_sizes; i++) {
1521 1527 if (hdr->sa_lengths[i] !=
1522 1528 idx_tab->sa_variable_lengths[i]) {
1523 1529 valid_idx = B_FALSE;
1524 1530 break;
1525 1531 }
1526 1532 }
1527 1533 }
1528 1534 if (valid_idx) {
1529 1535 sa_idx_tab_hold(os, idx_tab);
1530 1536 return (idx_tab);
1531 1537 }
1532 1538 }
1533 1539
1534 1540 /* No such luck, create a new entry */
1535 1541 idx_tab = kmem_zalloc(sizeof (sa_idx_tab_t), KM_SLEEP);
1536 1542 idx_tab->sa_idx_tab =
1537 1543 kmem_zalloc(sizeof (uint32_t) * sa->sa_num_attrs, KM_SLEEP);
1538 1544 idx_tab->sa_layout = tb;
1539 1545 refcount_create(&idx_tab->sa_refcount);
1540 1546 if (tb->lot_var_sizes)
1541 1547 idx_tab->sa_variable_lengths = kmem_alloc(sizeof (uint16_t) *
1542 1548 tb->lot_var_sizes, KM_SLEEP);
1543 1549
1544 1550 sa_attr_iter(os, hdr, bonustype, sa_build_idx_tab,
1545 1551 tb, idx_tab);
1546 1552 sa_idx_tab_hold(os, idx_tab); /* one hold for consumer */
1547 1553 sa_idx_tab_hold(os, idx_tab); /* one for layout */
1548 1554 list_insert_tail(&tb->lot_idx_tab, idx_tab);
1549 1555 return (idx_tab);
1550 1556 }
1551 1557
1552 1558 void
1553 1559 sa_default_locator(void **dataptr, uint32_t *len, uint32_t total_len,
1554 1560 boolean_t start, void *userdata)
1555 1561 {
1556 1562 ASSERT(start);
1557 1563
1558 1564 *dataptr = userdata;
1559 1565 *len = total_len;
1560 1566 }
1561 1567
1562 1568 static void
1563 1569 sa_attr_register_sync(sa_handle_t *hdl, dmu_tx_t *tx)
1564 1570 {
1565 1571 uint64_t attr_value = 0;
1566 1572 sa_os_t *sa = hdl->sa_os->os_sa;
1567 1573 sa_attr_table_t *tb = sa->sa_attr_table;
1568 1574 int i;
1569 1575
1570 1576 mutex_enter(&sa->sa_lock);
1571 1577
1572 1578 if (!sa->sa_need_attr_registration || sa->sa_master_obj == NULL) {
1573 1579 mutex_exit(&sa->sa_lock);
1574 1580 return;
1575 1581 }
1576 1582
1577 1583 if (sa->sa_reg_attr_obj == NULL) {
1578 1584 sa->sa_reg_attr_obj = zap_create_link(hdl->sa_os,
1579 1585 DMU_OT_SA_ATTR_REGISTRATION,
1580 1586 sa->sa_master_obj, SA_REGISTRY, tx);
1581 1587 }
1582 1588 for (i = 0; i != sa->sa_num_attrs; i++) {
1583 1589 if (sa->sa_attr_table[i].sa_registered)
1584 1590 continue;
1585 1591 ATTR_ENCODE(attr_value, tb[i].sa_attr, tb[i].sa_length,
1586 1592 tb[i].sa_byteswap);
1587 1593 VERIFY(0 == zap_update(hdl->sa_os, sa->sa_reg_attr_obj,
1588 1594 tb[i].sa_name, 8, 1, &attr_value, tx));
1589 1595 tb[i].sa_registered = B_TRUE;
1590 1596 }
1591 1597 sa->sa_need_attr_registration = B_FALSE;
1592 1598 mutex_exit(&sa->sa_lock);
1593 1599 }
1594 1600
1595 1601 /*
1596 1602 * Replace all attributes with attributes specified in template.
1597 1603 * If dnode had a spill buffer then those attributes will be
1598 1604 * also be replaced, possibly with just an empty spill block
1599 1605 *
1600 1606 * This interface is intended to only be used for bulk adding of
1601 1607 * attributes for a new file. It will also be used by the ZPL
1602 1608 * when converting and old formatted znode to native SA support.
1603 1609 */
1604 1610 int
1605 1611 sa_replace_all_by_template_locked(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
1606 1612 int attr_count, dmu_tx_t *tx)
1607 1613 {
1608 1614 sa_os_t *sa = hdl->sa_os->os_sa;
1609 1615
1610 1616 if (sa->sa_need_attr_registration)
1611 1617 sa_attr_register_sync(hdl, tx);
1612 1618 return (sa_build_layouts(hdl, attr_desc, attr_count, tx));
1613 1619 }
1614 1620
1615 1621 int
1616 1622 sa_replace_all_by_template(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
1617 1623 int attr_count, dmu_tx_t *tx)
1618 1624 {
1619 1625 int error;
1620 1626
1621 1627 mutex_enter(&hdl->sa_lock);
1622 1628 error = sa_replace_all_by_template_locked(hdl, attr_desc,
1623 1629 attr_count, tx);
1624 1630 mutex_exit(&hdl->sa_lock);
1625 1631 return (error);
1626 1632 }
1627 1633
1628 1634 /*
1629 1635 * add/remove/replace a single attribute and then rewrite the entire set
1630 1636 * of attributes.
1631 1637 */
1632 1638 static int
1633 1639 sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
1634 1640 sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
1635 1641 uint16_t buflen, dmu_tx_t *tx)
1636 1642 {
1637 1643 sa_os_t *sa = hdl->sa_os->os_sa;
1638 1644 dmu_buf_impl_t *db = (dmu_buf_impl_t *)hdl->sa_bonus;
1639 1645 dnode_t *dn;
1640 1646 sa_bulk_attr_t *attr_desc;
1641 1647 void *old_data[2];
1642 1648 int bonus_attr_count = 0;
1643 1649 int bonus_data_size = 0;
1644 1650 int spill_data_size = 0;
1645 1651 int spill_attr_count = 0;
1646 1652 int error;
1647 1653 uint16_t length;
1648 1654 int i, j, k, length_idx;
1649 1655 sa_hdr_phys_t *hdr;
1650 1656 sa_idx_tab_t *idx_tab;
1651 1657 int attr_count;
1652 1658 int count;
1653 1659
1654 1660 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1655 1661
1656 1662 /* First make of copy of the old data */
1657 1663
1658 1664 DB_DNODE_ENTER(db);
1659 1665 dn = DB_DNODE(db);
1660 1666 if (dn->dn_bonuslen != 0) {
1661 1667 bonus_data_size = hdl->sa_bonus->db_size;
1662 1668 old_data[0] = kmem_alloc(bonus_data_size, KM_SLEEP);
1663 1669 bcopy(hdl->sa_bonus->db_data, old_data[0],
1664 1670 hdl->sa_bonus->db_size);
1665 1671 bonus_attr_count = hdl->sa_bonus_tab->sa_layout->lot_attr_count;
1666 1672 } else {
1667 1673 old_data[0] = NULL;
1668 1674 }
1669 1675 DB_DNODE_EXIT(db);
1670 1676
1671 1677 /* Bring spill buffer online if it isn't currently */
1672 1678
1673 1679 if ((error = sa_get_spill(hdl)) == 0) {
1674 1680 spill_data_size = hdl->sa_spill->db_size;
1675 1681 old_data[1] = kmem_alloc(spill_data_size, KM_SLEEP);
1676 1682 bcopy(hdl->sa_spill->db_data, old_data[1],
1677 1683 hdl->sa_spill->db_size);
1678 1684 spill_attr_count =
1679 1685 hdl->sa_spill_tab->sa_layout->lot_attr_count;
1680 1686 } else if (error && error != ENOENT) {
1681 1687 if (old_data[0])
1682 1688 kmem_free(old_data[0], bonus_data_size);
1683 1689 return (error);
1684 1690 } else {
1685 1691 old_data[1] = NULL;
1686 1692 }
1687 1693
1688 1694 /* build descriptor of all attributes */
1689 1695
1690 1696 attr_count = bonus_attr_count + spill_attr_count;
1691 1697 if (action == SA_ADD)
1692 1698 attr_count++;
1693 1699 else if (action == SA_REMOVE)
1694 1700 attr_count--;
1695 1701
1696 1702 attr_desc = kmem_zalloc(sizeof (sa_bulk_attr_t) * attr_count, KM_SLEEP);
1697 1703
1698 1704 /*
1699 1705 * loop through bonus and spill buffer if it exists, and
1700 1706 * build up new attr_descriptor to reset the attributes
1701 1707 */
1702 1708 k = j = 0;
1703 1709 count = bonus_attr_count;
1704 1710 hdr = SA_GET_HDR(hdl, SA_BONUS);
1705 1711 idx_tab = SA_IDX_TAB_GET(hdl, SA_BONUS);
1706 1712 for (; k != 2; k++) {
1707 1713 /* iterate over each attribute in layout */
1708 1714 for (i = 0, length_idx = 0; i != count; i++) {
1709 1715 sa_attr_type_t attr;
1710 1716
1711 1717 attr = idx_tab->sa_layout->lot_attrs[i];
1712 1718 if (attr == newattr) {
1713 1719 if (action == SA_REMOVE) {
1714 1720 j++;
1715 1721 continue;
1716 1722 }
1717 1723 ASSERT(SA_REGISTERED_LEN(sa, attr) == 0);
1718 1724 ASSERT(action == SA_REPLACE);
1719 1725 SA_ADD_BULK_ATTR(attr_desc, j, attr,
1720 1726 locator, datastart, buflen);
1721 1727 } else {
1722 1728 length = SA_REGISTERED_LEN(sa, attr);
1723 1729 if (length == 0) {
1724 1730 length = hdr->sa_lengths[length_idx++];
1725 1731 }
1726 1732
1727 1733 SA_ADD_BULK_ATTR(attr_desc, j, attr,
1728 1734 NULL, (void *)
1729 1735 (TOC_OFF(idx_tab->sa_idx_tab[attr]) +
1730 1736 (uintptr_t)old_data[k]), length);
1731 1737 }
1732 1738 }
1733 1739 if (k == 0 && hdl->sa_spill) {
1734 1740 hdr = SA_GET_HDR(hdl, SA_SPILL);
1735 1741 idx_tab = SA_IDX_TAB_GET(hdl, SA_SPILL);
1736 1742 count = spill_attr_count;
1737 1743 } else {
1738 1744 break;
1739 1745 }
1740 1746 }
1741 1747 if (action == SA_ADD) {
1742 1748 length = SA_REGISTERED_LEN(sa, newattr);
1743 1749 if (length == 0) {
1744 1750 length = buflen;
1745 1751 }
1746 1752 SA_ADD_BULK_ATTR(attr_desc, j, newattr, locator,
1747 1753 datastart, buflen);
1748 1754 }
1749 1755
1750 1756 error = sa_build_layouts(hdl, attr_desc, attr_count, tx);
1751 1757
1752 1758 if (old_data[0])
1753 1759 kmem_free(old_data[0], bonus_data_size);
1754 1760 if (old_data[1])
1755 1761 kmem_free(old_data[1], spill_data_size);
1756 1762 kmem_free(attr_desc, sizeof (sa_bulk_attr_t) * attr_count);
1757 1763
1758 1764 return (error);
1759 1765 }
1760 1766
1761 1767 static int
1762 1768 sa_bulk_update_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
1763 1769 dmu_tx_t *tx)
1764 1770 {
1765 1771 int error;
1766 1772 sa_os_t *sa = hdl->sa_os->os_sa;
1767 1773 dmu_object_type_t bonustype;
1768 1774
1769 1775 bonustype = SA_BONUSTYPE_FROM_DB(SA_GET_DB(hdl, SA_BONUS));
1770 1776
1771 1777 ASSERT(hdl);
1772 1778 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1773 1779
1774 1780 /* sync out registration table if necessary */
1775 1781 if (sa->sa_need_attr_registration)
1776 1782 sa_attr_register_sync(hdl, tx);
1777 1783
1778 1784 error = sa_attr_op(hdl, bulk, count, SA_UPDATE, tx);
1779 1785 if (error == 0 && !IS_SA_BONUSTYPE(bonustype) && sa->sa_update_cb)
1780 1786 sa->sa_update_cb(hdl, tx);
1781 1787
1782 1788 return (error);
1783 1789 }
1784 1790
1785 1791 /*
1786 1792 * update or add new attribute
1787 1793 */
1788 1794 int
1789 1795 sa_update(sa_handle_t *hdl, sa_attr_type_t type,
1790 1796 void *buf, uint32_t buflen, dmu_tx_t *tx)
1791 1797 {
1792 1798 int error;
1793 1799 sa_bulk_attr_t bulk;
1794 1800
1795 1801 bulk.sa_attr = type;
1796 1802 bulk.sa_data_func = NULL;
1797 1803 bulk.sa_length = buflen;
1798 1804 bulk.sa_data = buf;
1799 1805
1800 1806 mutex_enter(&hdl->sa_lock);
1801 1807 error = sa_bulk_update_impl(hdl, &bulk, 1, tx);
1802 1808 mutex_exit(&hdl->sa_lock);
1803 1809 return (error);
1804 1810 }
1805 1811
1806 1812 int
1807 1813 sa_update_from_cb(sa_handle_t *hdl, sa_attr_type_t attr,
1808 1814 uint32_t buflen, sa_data_locator_t *locator, void *userdata, dmu_tx_t *tx)
1809 1815 {
1810 1816 int error;
1811 1817 sa_bulk_attr_t bulk;
1812 1818
1813 1819 bulk.sa_attr = attr;
1814 1820 bulk.sa_data = userdata;
1815 1821 bulk.sa_data_func = locator;
1816 1822 bulk.sa_length = buflen;
1817 1823
1818 1824 mutex_enter(&hdl->sa_lock);
1819 1825 error = sa_bulk_update_impl(hdl, &bulk, 1, tx);
1820 1826 mutex_exit(&hdl->sa_lock);
1821 1827 return (error);
1822 1828 }
1823 1829
1824 1830 /*
1825 1831 * Return size of an attribute
1826 1832 */
1827 1833
1828 1834 int
1829 1835 sa_size(sa_handle_t *hdl, sa_attr_type_t attr, int *size)
1830 1836 {
1831 1837 sa_bulk_attr_t bulk;
1832 1838 int error;
1833 1839
1834 1840 bulk.sa_data = NULL;
1835 1841 bulk.sa_attr = attr;
1836 1842 bulk.sa_data_func = NULL;
1837 1843
1838 1844 ASSERT(hdl);
1839 1845 mutex_enter(&hdl->sa_lock);
1840 1846 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) != 0) {
1841 1847 mutex_exit(&hdl->sa_lock);
1842 1848 return (error);
1843 1849 }
1844 1850 *size = bulk.sa_size;
1845 1851
1846 1852 mutex_exit(&hdl->sa_lock);
1847 1853 return (0);
1848 1854 }
1849 1855
1850 1856 int
1851 1857 sa_bulk_lookup_locked(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
1852 1858 {
1853 1859 ASSERT(hdl);
1854 1860 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1855 1861 return (sa_lookup_impl(hdl, attrs, count));
1856 1862 }
1857 1863
1858 1864 int
1859 1865 sa_bulk_lookup(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
1860 1866 {
1861 1867 int error;
1862 1868
1863 1869 ASSERT(hdl);
1864 1870 mutex_enter(&hdl->sa_lock);
1865 1871 error = sa_bulk_lookup_locked(hdl, attrs, count);
1866 1872 mutex_exit(&hdl->sa_lock);
1867 1873 return (error);
1868 1874 }
1869 1875
1870 1876 int
1871 1877 sa_bulk_update(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count, dmu_tx_t *tx)
1872 1878 {
1873 1879 int error;
1874 1880
1875 1881 ASSERT(hdl);
1876 1882 mutex_enter(&hdl->sa_lock);
1877 1883 error = sa_bulk_update_impl(hdl, attrs, count, tx);
1878 1884 mutex_exit(&hdl->sa_lock);
1879 1885 return (error);
1880 1886 }
1881 1887
1882 1888 int
1883 1889 sa_remove(sa_handle_t *hdl, sa_attr_type_t attr, dmu_tx_t *tx)
1884 1890 {
1885 1891 int error;
1886 1892
1887 1893 mutex_enter(&hdl->sa_lock);
1888 1894 error = sa_modify_attrs(hdl, attr, SA_REMOVE, NULL,
1889 1895 NULL, 0, tx);
1890 1896 mutex_exit(&hdl->sa_lock);
1891 1897 return (error);
1892 1898 }
1893 1899
1894 1900 void
1895 1901 sa_object_info(sa_handle_t *hdl, dmu_object_info_t *doi)
1896 1902 {
1897 1903 dmu_object_info_from_db((dmu_buf_t *)hdl->sa_bonus, doi);
1898 1904 }
1899 1905
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1900 1906 void
1901 1907 sa_object_size(sa_handle_t *hdl, uint32_t *blksize, u_longlong_t *nblocks)
1902 1908 {
1903 1909 dmu_object_size_from_db((dmu_buf_t *)hdl->sa_bonus,
1904 1910 blksize, nblocks);
1905 1911 }
1906 1912
1907 1913 void
1908 1914 sa_update_user(sa_handle_t *newhdl, sa_handle_t *oldhdl)
1909 1915 {
1910 - (void) dmu_buf_update_user((dmu_buf_t *)newhdl->sa_bonus,
1911 - oldhdl, newhdl, NULL, sa_evict);
1916 + dmu_buf_user_t *new_user = &newhdl->db_evict;
1917 + dmu_buf_user_t *old_user = &oldhdl->db_evict;
1918 +
1919 + dmu_buf_init_user(new_user, sa_evict);
1920 + VERIFY(dmu_buf_replace_user(newhdl->sa_bonus, old_user,
1921 + new_user) == old_user);
1912 1922 oldhdl->sa_bonus = NULL;
1913 1923 }
1914 1924
1915 1925 void
1916 1926 sa_set_userp(sa_handle_t *hdl, void *ptr)
1917 1927 {
1918 1928 hdl->sa_userp = ptr;
1919 1929 }
1920 1930
1921 1931 dmu_buf_t *
1922 1932 sa_get_db(sa_handle_t *hdl)
1923 1933 {
1924 1934 return ((dmu_buf_t *)hdl->sa_bonus);
1925 1935 }
1926 1936
1927 1937 void *
1928 1938 sa_get_userdata(sa_handle_t *hdl)
1929 1939 {
1930 1940 return (hdl->sa_userp);
1931 1941 }
1932 1942
1933 1943 void
1934 1944 sa_register_update_callback_locked(objset_t *os, sa_update_cb_t *func)
1935 1945 {
1936 1946 ASSERT(MUTEX_HELD(&os->os_sa->sa_lock));
1937 1947 os->os_sa->sa_update_cb = func;
1938 1948 }
1939 1949
1940 1950 void
1941 1951 sa_register_update_callback(objset_t *os, sa_update_cb_t *func)
1942 1952 {
1943 1953
1944 1954 mutex_enter(&os->os_sa->sa_lock);
1945 1955 sa_register_update_callback_locked(os, func);
1946 1956 mutex_exit(&os->os_sa->sa_lock);
1947 1957 }
1948 1958
1949 1959 uint64_t
1950 1960 sa_handle_object(sa_handle_t *hdl)
1951 1961 {
1952 1962 return (hdl->sa_bonus->db_object);
1953 1963 }
1954 1964
1955 1965 boolean_t
1956 1966 sa_enabled(objset_t *os)
1957 1967 {
1958 1968 return (os->os_sa == NULL);
1959 1969 }
1960 1970
1961 1971 int
1962 1972 sa_set_sa_object(objset_t *os, uint64_t sa_object)
1963 1973 {
1964 1974 sa_os_t *sa = os->os_sa;
1965 1975
1966 1976 if (sa->sa_master_obj)
1967 1977 return (1);
1968 1978
1969 1979 sa->sa_master_obj = sa_object;
1970 1980
1971 1981 return (0);
1972 1982 }
1973 1983
1974 1984 int
1975 1985 sa_hdrsize(void *arg)
1976 1986 {
1977 1987 sa_hdr_phys_t *hdr = arg;
1978 1988
1979 1989 return (SA_HDR_SIZE(hdr));
1980 1990 }
1981 1991
1982 1992 void
1983 1993 sa_handle_lock(sa_handle_t *hdl)
1984 1994 {
1985 1995 ASSERT(hdl);
1986 1996 mutex_enter(&hdl->sa_lock);
1987 1997 }
1988 1998
1989 1999 void
1990 2000 sa_handle_unlock(sa_handle_t *hdl)
1991 2001 {
1992 2002 ASSERT(hdl);
1993 2003 mutex_exit(&hdl->sa_lock);
1994 2004 }
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