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2619 asynchronous destruction of ZFS file systems
2747 SPA versioning with zfs feature flags
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <gwilson@delphix.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Dan Kruchinin <dan.kruchinin@gmail.com>
Approved by: Dan McDonald <danmcd@nexenta.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
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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 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
23 24 * Portions Copyright 2011 iXsystems, Inc
25 + * Copyright (c) 2012 by Delphix. All rights reserved.
24 26 */
25 27
26 28 #include <sys/zfs_context.h>
27 29 #include <sys/types.h>
28 30 #include <sys/param.h>
29 31 #include <sys/systm.h>
30 32 #include <sys/sysmacros.h>
31 33 #include <sys/dmu.h>
32 34 #include <sys/dmu_impl.h>
33 35 #include <sys/dmu_objset.h>
34 36 #include <sys/dbuf.h>
35 37 #include <sys/dnode.h>
36 38 #include <sys/zap.h>
37 39 #include <sys/sa.h>
38 40 #include <sys/sunddi.h>
39 41 #include <sys/sa_impl.h>
40 42 #include <sys/dnode.h>
41 43 #include <sys/errno.h>
42 44 #include <sys/zfs_context.h>
43 45
44 46 /*
45 47 * ZFS System attributes:
46 48 *
47 49 * A generic mechanism to allow for arbitrary attributes
48 50 * to be stored in a dnode. The data will be stored in the bonus buffer of
49 51 * the dnode and if necessary a special "spill" block will be used to handle
50 52 * overflow situations. The spill block will be sized to fit the data
51 53 * from 512 - 128K. When a spill block is used the BP (blkptr_t) for the
52 54 * spill block is stored at the end of the current bonus buffer. Any
53 55 * attributes that would be in the way of the blkptr_t will be relocated
54 56 * into the spill block.
55 57 *
56 58 * Attribute registration:
57 59 *
58 60 * Stored persistently on a per dataset basis
59 61 * a mapping between attribute "string" names and their actual attribute
60 62 * numeric values, length, and byteswap function. The names are only used
61 63 * during registration. All attributes are known by their unique attribute
62 64 * id value. If an attribute can have a variable size then the value
63 65 * 0 will be used to indicate this.
64 66 *
65 67 * Attribute Layout:
66 68 *
67 69 * Attribute layouts are a way to compactly store multiple attributes, but
68 70 * without taking the overhead associated with managing each attribute
69 71 * individually. Since you will typically have the same set of attributes
70 72 * stored in the same order a single table will be used to represent that
71 73 * layout. The ZPL for example will usually have only about 10 different
72 74 * layouts (regular files, device files, symlinks,
73 75 * regular files + scanstamp, files/dir with extended attributes, and then
74 76 * you have the possibility of all of those minus ACL, because it would
75 77 * be kicked out into the spill block)
76 78 *
77 79 * Layouts are simply an array of the attributes and their
78 80 * ordering i.e. [0, 1, 4, 5, 2]
79 81 *
80 82 * Each distinct layout is given a unique layout number and that is whats
81 83 * stored in the header at the beginning of the SA data buffer.
82 84 *
83 85 * A layout only covers a single dbuf (bonus or spill). If a set of
84 86 * attributes is split up between the bonus buffer and a spill buffer then
85 87 * two different layouts will be used. This allows us to byteswap the
86 88 * spill without looking at the bonus buffer and keeps the on disk format of
87 89 * the bonus and spill buffer the same.
88 90 *
89 91 * Adding a single attribute will cause the entire set of attributes to
90 92 * be rewritten and could result in a new layout number being constructed
91 93 * as part of the rewrite if no such layout exists for the new set of
92 94 * attribues. The new attribute will be appended to the end of the already
93 95 * existing attributes.
94 96 *
95 97 * Both the attribute registration and attribute layout information are
96 98 * stored in normal ZAP attributes. Their should be a small number of
97 99 * known layouts and the set of attributes is assumed to typically be quite
98 100 * small.
99 101 *
100 102 * The registered attributes and layout "table" information is maintained
101 103 * in core and a special "sa_os_t" is attached to the objset_t.
102 104 *
103 105 * A special interface is provided to allow for quickly applying
104 106 * a large set of attributes at once. sa_replace_all_by_template() is
105 107 * used to set an array of attributes. This is used by the ZPL when
106 108 * creating a brand new file. The template that is passed into the function
107 109 * specifies the attribute, size for variable length attributes, location of
108 110 * data and special "data locator" function if the data isn't in a contiguous
109 111 * location.
110 112 *
111 113 * Byteswap implications:
112 114 * Since the SA attributes are not entirely self describing we can't do
113 115 * the normal byteswap processing. The special ZAP layout attribute and
114 116 * attribute registration attributes define the byteswap function and the
115 117 * size of the attributes, unless it is variable sized.
116 118 * The normal ZFS byteswapping infrastructure assumes you don't need
117 119 * to read any objects in order to do the necessary byteswapping. Whereas
118 120 * SA attributes can only be properly byteswapped if the dataset is opened
119 121 * and the layout/attribute ZAP attributes are available. Because of this
120 122 * the SA attributes will be byteswapped when they are first accessed by
121 123 * the SA code that will read the SA data.
122 124 */
123 125
124 126 typedef void (sa_iterfunc_t)(void *hdr, void *addr, sa_attr_type_t,
125 127 uint16_t length, int length_idx, boolean_t, void *userp);
126 128
127 129 static int sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype);
128 130 static void sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab);
129 131 static void *sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype,
130 132 void *data);
131 133 static void sa_idx_tab_rele(objset_t *os, void *arg);
132 134 static void sa_copy_data(sa_data_locator_t *func, void *start, void *target,
133 135 int buflen);
134 136 static int sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
135 137 sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
136 138 uint16_t buflen, dmu_tx_t *tx);
137 139
138 140 arc_byteswap_func_t *sa_bswap_table[] = {
139 141 byteswap_uint64_array,
140 142 byteswap_uint32_array,
141 143 byteswap_uint16_array,
142 144 byteswap_uint8_array,
143 145 zfs_acl_byteswap,
144 146 };
145 147
146 148 #define SA_COPY_DATA(f, s, t, l) \
147 149 { \
148 150 if (f == NULL) { \
149 151 if (l == 8) { \
150 152 *(uint64_t *)t = *(uint64_t *)s; \
151 153 } else if (l == 16) { \
152 154 *(uint64_t *)t = *(uint64_t *)s; \
153 155 *(uint64_t *)((uintptr_t)t + 8) = \
154 156 *(uint64_t *)((uintptr_t)s + 8); \
155 157 } else { \
156 158 bcopy(s, t, l); \
157 159 } \
158 160 } else \
159 161 sa_copy_data(f, s, t, l); \
160 162 }
161 163
162 164 /*
163 165 * This table is fixed and cannot be changed. Its purpose is to
164 166 * allow the SA code to work with both old/new ZPL file systems.
165 167 * It contains the list of legacy attributes. These attributes aren't
166 168 * stored in the "attribute" registry zap objects, since older ZPL file systems
167 169 * won't have the registry. Only objsets of type ZFS_TYPE_FILESYSTEM will
168 170 * use this static table.
169 171 */
170 172 sa_attr_reg_t sa_legacy_attrs[] = {
171 173 {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0},
172 174 {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1},
173 175 {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2},
174 176 {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3},
175 177 {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4},
176 178 {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5},
177 179 {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6},
178 180 {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7},
179 181 {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8},
180 182 {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9},
181 183 {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10},
182 184 {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11},
183 185 {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12},
184 186 {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13},
185 187 {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14},
186 188 {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15},
187 189 };
188 190
189 191 /*
190 192 * ZPL legacy layout
191 193 * This is only used for objects of type DMU_OT_ZNODE
192 194 */
193 195 sa_attr_type_t sa_legacy_zpl_layout[] = {
194 196 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
195 197 };
196 198
197 199 /*
198 200 * Special dummy layout used for buffers with no attributes.
199 201 */
200 202
201 203 sa_attr_type_t sa_dummy_zpl_layout[] = { 0 };
202 204
203 205 static int sa_legacy_attr_count = 16;
204 206 static kmem_cache_t *sa_cache = NULL;
205 207
206 208 /*ARGSUSED*/
207 209 static int
208 210 sa_cache_constructor(void *buf, void *unused, int kmflag)
209 211 {
210 212 sa_handle_t *hdl = buf;
211 213
212 214 hdl->sa_bonus_tab = NULL;
213 215 hdl->sa_spill_tab = NULL;
214 216 hdl->sa_os = NULL;
215 217 hdl->sa_userp = NULL;
216 218 hdl->sa_bonus = NULL;
217 219 hdl->sa_spill = NULL;
218 220 mutex_init(&hdl->sa_lock, NULL, MUTEX_DEFAULT, NULL);
219 221 return (0);
220 222 }
221 223
222 224 /*ARGSUSED*/
223 225 static void
224 226 sa_cache_destructor(void *buf, void *unused)
225 227 {
226 228 sa_handle_t *hdl = buf;
227 229 mutex_destroy(&hdl->sa_lock);
228 230 }
229 231
230 232 void
231 233 sa_cache_init(void)
232 234 {
233 235 sa_cache = kmem_cache_create("sa_cache",
234 236 sizeof (sa_handle_t), 0, sa_cache_constructor,
235 237 sa_cache_destructor, NULL, NULL, NULL, 0);
236 238 }
237 239
238 240 void
239 241 sa_cache_fini(void)
240 242 {
241 243 if (sa_cache)
242 244 kmem_cache_destroy(sa_cache);
243 245 }
244 246
245 247 static int
246 248 layout_num_compare(const void *arg1, const void *arg2)
247 249 {
248 250 const sa_lot_t *node1 = arg1;
249 251 const sa_lot_t *node2 = arg2;
250 252
251 253 if (node1->lot_num > node2->lot_num)
252 254 return (1);
253 255 else if (node1->lot_num < node2->lot_num)
254 256 return (-1);
255 257 return (0);
256 258 }
257 259
258 260 static int
259 261 layout_hash_compare(const void *arg1, const void *arg2)
260 262 {
261 263 const sa_lot_t *node1 = arg1;
262 264 const sa_lot_t *node2 = arg2;
263 265
264 266 if (node1->lot_hash > node2->lot_hash)
265 267 return (1);
266 268 if (node1->lot_hash < node2->lot_hash)
267 269 return (-1);
268 270 if (node1->lot_instance > node2->lot_instance)
269 271 return (1);
270 272 if (node1->lot_instance < node2->lot_instance)
271 273 return (-1);
272 274 return (0);
273 275 }
274 276
275 277 boolean_t
276 278 sa_layout_equal(sa_lot_t *tbf, sa_attr_type_t *attrs, int count)
277 279 {
278 280 int i;
279 281
280 282 if (count != tbf->lot_attr_count)
281 283 return (1);
282 284
283 285 for (i = 0; i != count; i++) {
284 286 if (attrs[i] != tbf->lot_attrs[i])
285 287 return (1);
286 288 }
287 289 return (0);
288 290 }
289 291
290 292 #define SA_ATTR_HASH(attr) (zfs_crc64_table[(-1ULL ^ attr) & 0xFF])
291 293
292 294 static uint64_t
293 295 sa_layout_info_hash(sa_attr_type_t *attrs, int attr_count)
294 296 {
295 297 int i;
296 298 uint64_t crc = -1ULL;
297 299
298 300 for (i = 0; i != attr_count; i++)
299 301 crc ^= SA_ATTR_HASH(attrs[i]);
300 302
301 303 return (crc);
302 304 }
303 305
304 306 static int
305 307 sa_get_spill(sa_handle_t *hdl)
306 308 {
307 309 int rc;
308 310 if (hdl->sa_spill == NULL) {
309 311 if ((rc = dmu_spill_hold_existing(hdl->sa_bonus, NULL,
310 312 &hdl->sa_spill)) == 0)
311 313 VERIFY(0 == sa_build_index(hdl, SA_SPILL));
312 314 } else {
313 315 rc = 0;
314 316 }
315 317
316 318 return (rc);
317 319 }
318 320
319 321 /*
320 322 * Main attribute lookup/update function
321 323 * returns 0 for success or non zero for failures
322 324 *
323 325 * Operates on bulk array, first failure will abort further processing
324 326 */
325 327 int
326 328 sa_attr_op(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
327 329 sa_data_op_t data_op, dmu_tx_t *tx)
328 330 {
329 331 sa_os_t *sa = hdl->sa_os->os_sa;
330 332 int i;
331 333 int error = 0;
332 334 sa_buf_type_t buftypes;
333 335
334 336 buftypes = 0;
335 337
336 338 ASSERT(count > 0);
337 339 for (i = 0; i != count; i++) {
338 340 ASSERT(bulk[i].sa_attr <= hdl->sa_os->os_sa->sa_num_attrs);
339 341
340 342 bulk[i].sa_addr = NULL;
341 343 /* First check the bonus buffer */
342 344
343 345 if (hdl->sa_bonus_tab && TOC_ATTR_PRESENT(
344 346 hdl->sa_bonus_tab->sa_idx_tab[bulk[i].sa_attr])) {
345 347 SA_ATTR_INFO(sa, hdl->sa_bonus_tab,
346 348 SA_GET_HDR(hdl, SA_BONUS),
347 349 bulk[i].sa_attr, bulk[i], SA_BONUS, hdl);
348 350 if (tx && !(buftypes & SA_BONUS)) {
349 351 dmu_buf_will_dirty(hdl->sa_bonus, tx);
350 352 buftypes |= SA_BONUS;
351 353 }
352 354 }
353 355 if (bulk[i].sa_addr == NULL &&
354 356 ((error = sa_get_spill(hdl)) == 0)) {
355 357 if (TOC_ATTR_PRESENT(
356 358 hdl->sa_spill_tab->sa_idx_tab[bulk[i].sa_attr])) {
357 359 SA_ATTR_INFO(sa, hdl->sa_spill_tab,
358 360 SA_GET_HDR(hdl, SA_SPILL),
359 361 bulk[i].sa_attr, bulk[i], SA_SPILL, hdl);
360 362 if (tx && !(buftypes & SA_SPILL) &&
361 363 bulk[i].sa_size == bulk[i].sa_length) {
362 364 dmu_buf_will_dirty(hdl->sa_spill, tx);
363 365 buftypes |= SA_SPILL;
364 366 }
365 367 }
366 368 }
367 369 if (error && error != ENOENT) {
368 370 return ((error == ECKSUM) ? EIO : error);
369 371 }
370 372
371 373 switch (data_op) {
372 374 case SA_LOOKUP:
373 375 if (bulk[i].sa_addr == NULL)
374 376 return (ENOENT);
375 377 if (bulk[i].sa_data) {
376 378 SA_COPY_DATA(bulk[i].sa_data_func,
377 379 bulk[i].sa_addr, bulk[i].sa_data,
378 380 bulk[i].sa_size);
379 381 }
380 382 continue;
381 383
382 384 case SA_UPDATE:
383 385 /* existing rewrite of attr */
384 386 if (bulk[i].sa_addr &&
385 387 bulk[i].sa_size == bulk[i].sa_length) {
386 388 SA_COPY_DATA(bulk[i].sa_data_func,
387 389 bulk[i].sa_data, bulk[i].sa_addr,
388 390 bulk[i].sa_length);
389 391 continue;
390 392 } else if (bulk[i].sa_addr) { /* attr size change */
391 393 error = sa_modify_attrs(hdl, bulk[i].sa_attr,
392 394 SA_REPLACE, bulk[i].sa_data_func,
393 395 bulk[i].sa_data, bulk[i].sa_length, tx);
394 396 } else { /* adding new attribute */
395 397 error = sa_modify_attrs(hdl, bulk[i].sa_attr,
396 398 SA_ADD, bulk[i].sa_data_func,
397 399 bulk[i].sa_data, bulk[i].sa_length, tx);
398 400 }
399 401 if (error)
400 402 return (error);
401 403 break;
402 404 }
403 405 }
404 406 return (error);
405 407 }
406 408
407 409 static sa_lot_t *
408 410 sa_add_layout_entry(objset_t *os, sa_attr_type_t *attrs, int attr_count,
409 411 uint64_t lot_num, uint64_t hash, boolean_t zapadd, dmu_tx_t *tx)
410 412 {
411 413 sa_os_t *sa = os->os_sa;
412 414 sa_lot_t *tb, *findtb;
413 415 int i;
414 416 avl_index_t loc;
415 417
416 418 ASSERT(MUTEX_HELD(&sa->sa_lock));
417 419 tb = kmem_zalloc(sizeof (sa_lot_t), KM_SLEEP);
418 420 tb->lot_attr_count = attr_count;
419 421 tb->lot_attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
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420 422 KM_SLEEP);
421 423 bcopy(attrs, tb->lot_attrs, sizeof (sa_attr_type_t) * attr_count);
422 424 tb->lot_num = lot_num;
423 425 tb->lot_hash = hash;
424 426 tb->lot_instance = 0;
425 427
426 428 if (zapadd) {
427 429 char attr_name[8];
428 430
429 431 if (sa->sa_layout_attr_obj == 0) {
430 - sa->sa_layout_attr_obj = zap_create(os,
431 - DMU_OT_SA_ATTR_LAYOUTS, DMU_OT_NONE, 0, tx);
432 - VERIFY(zap_add(os, sa->sa_master_obj, SA_LAYOUTS, 8, 1,
433 - &sa->sa_layout_attr_obj, tx) == 0);
432 + sa->sa_layout_attr_obj = zap_create_link(os,
433 + DMU_OT_SA_ATTR_LAYOUTS,
434 + sa->sa_master_obj, SA_LAYOUTS, tx);
434 435 }
435 436
436 437 (void) snprintf(attr_name, sizeof (attr_name),
437 438 "%d", (int)lot_num);
438 439 VERIFY(0 == zap_update(os, os->os_sa->sa_layout_attr_obj,
439 440 attr_name, 2, attr_count, attrs, tx));
440 441 }
441 442
442 443 list_create(&tb->lot_idx_tab, sizeof (sa_idx_tab_t),
443 444 offsetof(sa_idx_tab_t, sa_next));
444 445
445 446 for (i = 0; i != attr_count; i++) {
446 447 if (sa->sa_attr_table[tb->lot_attrs[i]].sa_length == 0)
447 448 tb->lot_var_sizes++;
448 449 }
449 450
450 451 avl_add(&sa->sa_layout_num_tree, tb);
451 452
452 453 /* verify we don't have a hash collision */
453 454 if ((findtb = avl_find(&sa->sa_layout_hash_tree, tb, &loc)) != NULL) {
454 455 for (; findtb && findtb->lot_hash == hash;
455 456 findtb = AVL_NEXT(&sa->sa_layout_hash_tree, findtb)) {
456 457 if (findtb->lot_instance != tb->lot_instance)
457 458 break;
458 459 tb->lot_instance++;
459 460 }
460 461 }
461 462 avl_add(&sa->sa_layout_hash_tree, tb);
462 463 return (tb);
463 464 }
464 465
465 466 static void
466 467 sa_find_layout(objset_t *os, uint64_t hash, sa_attr_type_t *attrs,
467 468 int count, dmu_tx_t *tx, sa_lot_t **lot)
468 469 {
469 470 sa_lot_t *tb, tbsearch;
470 471 avl_index_t loc;
471 472 sa_os_t *sa = os->os_sa;
472 473 boolean_t found = B_FALSE;
473 474
474 475 mutex_enter(&sa->sa_lock);
475 476 tbsearch.lot_hash = hash;
476 477 tbsearch.lot_instance = 0;
477 478 tb = avl_find(&sa->sa_layout_hash_tree, &tbsearch, &loc);
478 479 if (tb) {
479 480 for (; tb && tb->lot_hash == hash;
480 481 tb = AVL_NEXT(&sa->sa_layout_hash_tree, tb)) {
481 482 if (sa_layout_equal(tb, attrs, count) == 0) {
482 483 found = B_TRUE;
483 484 break;
484 485 }
485 486 }
486 487 }
487 488 if (!found) {
488 489 tb = sa_add_layout_entry(os, attrs, count,
489 490 avl_numnodes(&sa->sa_layout_num_tree), hash, B_TRUE, tx);
490 491 }
491 492 mutex_exit(&sa->sa_lock);
492 493 *lot = tb;
493 494 }
494 495
495 496 static int
496 497 sa_resize_spill(sa_handle_t *hdl, uint32_t size, dmu_tx_t *tx)
497 498 {
498 499 int error;
499 500 uint32_t blocksize;
500 501
501 502 if (size == 0) {
502 503 blocksize = SPA_MINBLOCKSIZE;
503 504 } else if (size > SPA_MAXBLOCKSIZE) {
504 505 ASSERT(0);
505 506 return (EFBIG);
506 507 } else {
507 508 blocksize = P2ROUNDUP_TYPED(size, SPA_MINBLOCKSIZE, uint32_t);
508 509 }
509 510
510 511 error = dbuf_spill_set_blksz(hdl->sa_spill, blocksize, tx);
511 512 ASSERT(error == 0);
512 513 return (error);
513 514 }
514 515
515 516 static void
516 517 sa_copy_data(sa_data_locator_t *func, void *datastart, void *target, int buflen)
517 518 {
518 519 if (func == NULL) {
519 520 bcopy(datastart, target, buflen);
520 521 } else {
521 522 boolean_t start;
522 523 int bytes;
523 524 void *dataptr;
524 525 void *saptr = target;
525 526 uint32_t length;
526 527
527 528 start = B_TRUE;
528 529 bytes = 0;
529 530 while (bytes < buflen) {
530 531 func(&dataptr, &length, buflen, start, datastart);
531 532 bcopy(dataptr, saptr, length);
532 533 saptr = (void *)((caddr_t)saptr + length);
533 534 bytes += length;
534 535 start = B_FALSE;
535 536 }
536 537 }
537 538 }
538 539
539 540 /*
540 541 * Determine several different sizes
541 542 * first the sa header size
542 543 * the number of bytes to be stored
543 544 * if spill would occur the index in the attribute array is returned
544 545 *
545 546 * the boolean will_spill will be set when spilling is necessary. It
546 547 * is only set when the buftype is SA_BONUS
547 548 */
548 549 static int
549 550 sa_find_sizes(sa_os_t *sa, sa_bulk_attr_t *attr_desc, int attr_count,
550 551 dmu_buf_t *db, sa_buf_type_t buftype, int *index, int *total,
551 552 boolean_t *will_spill)
552 553 {
553 554 int var_size = 0;
554 555 int i;
555 556 int full_space;
556 557 int hdrsize;
557 558 boolean_t done = B_FALSE;
558 559
559 560 if (buftype == SA_BONUS && sa->sa_force_spill) {
560 561 *total = 0;
561 562 *index = 0;
562 563 *will_spill = B_TRUE;
563 564 return (0);
564 565 }
565 566
566 567 *index = -1;
567 568 *total = 0;
568 569
569 570 if (buftype == SA_BONUS)
570 571 *will_spill = B_FALSE;
571 572
572 573 hdrsize = (SA_BONUSTYPE_FROM_DB(db) == DMU_OT_ZNODE) ? 0 :
573 574 sizeof (sa_hdr_phys_t);
574 575
575 576 full_space = (buftype == SA_BONUS) ? DN_MAX_BONUSLEN : db->db_size;
576 577
577 578 for (i = 0; i != attr_count; i++) {
578 579 boolean_t is_var_sz;
579 580
580 581 *total += attr_desc[i].sa_length;
581 582 if (done)
582 583 goto next;
583 584
584 585 is_var_sz = (SA_REGISTERED_LEN(sa, attr_desc[i].sa_attr) == 0);
585 586 if (is_var_sz) {
586 587 var_size++;
587 588 }
588 589
589 590 if (is_var_sz && var_size > 1) {
590 591 if (P2ROUNDUP(hdrsize + sizeof (uint16_t), 8) +
591 592 *total < full_space) {
592 593 hdrsize += sizeof (uint16_t);
593 594 } else {
594 595 done = B_TRUE;
595 596 *index = i;
596 597 if (buftype == SA_BONUS)
597 598 *will_spill = B_TRUE;
598 599 continue;
599 600 }
600 601 }
601 602
602 603 /*
603 604 * find index of where spill *could* occur.
604 605 * Then continue to count of remainder attribute
605 606 * space. The sum is used later for sizing bonus
606 607 * and spill buffer.
607 608 */
608 609 if (buftype == SA_BONUS && *index == -1 &&
609 610 *total + P2ROUNDUP(hdrsize, 8) >
610 611 (full_space - sizeof (blkptr_t))) {
611 612 *index = i;
612 613 done = B_TRUE;
613 614 }
614 615
615 616 next:
616 617 if (*total + P2ROUNDUP(hdrsize, 8) > full_space &&
617 618 buftype == SA_BONUS)
618 619 *will_spill = B_TRUE;
619 620 }
620 621
621 622 hdrsize = P2ROUNDUP(hdrsize, 8);
622 623 return (hdrsize);
623 624 }
624 625
625 626 #define BUF_SPACE_NEEDED(total, header) (total + header)
626 627
627 628 /*
628 629 * Find layout that corresponds to ordering of attributes
629 630 * If not found a new layout number is created and added to
630 631 * persistent layout tables.
631 632 */
632 633 static int
633 634 sa_build_layouts(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, int attr_count,
634 635 dmu_tx_t *tx)
635 636 {
636 637 sa_os_t *sa = hdl->sa_os->os_sa;
637 638 uint64_t hash;
638 639 sa_buf_type_t buftype;
639 640 sa_hdr_phys_t *sahdr;
640 641 void *data_start;
641 642 int buf_space;
642 643 sa_attr_type_t *attrs, *attrs_start;
643 644 int i, lot_count;
644 645 int hdrsize, spillhdrsize;
645 646 int used;
646 647 dmu_object_type_t bonustype;
647 648 sa_lot_t *lot;
648 649 int len_idx;
649 650 int spill_used;
650 651 boolean_t spilling;
651 652
652 653 dmu_buf_will_dirty(hdl->sa_bonus, tx);
653 654 bonustype = SA_BONUSTYPE_FROM_DB(hdl->sa_bonus);
654 655
655 656 /* first determine bonus header size and sum of all attributes */
656 657 hdrsize = sa_find_sizes(sa, attr_desc, attr_count, hdl->sa_bonus,
657 658 SA_BONUS, &i, &used, &spilling);
658 659
659 660 if (used > SPA_MAXBLOCKSIZE)
660 661 return (EFBIG);
661 662
662 663 VERIFY(0 == dmu_set_bonus(hdl->sa_bonus, spilling ?
663 664 MIN(DN_MAX_BONUSLEN - sizeof (blkptr_t), used + hdrsize) :
664 665 used + hdrsize, tx));
665 666
666 667 ASSERT((bonustype == DMU_OT_ZNODE && spilling == 0) ||
667 668 bonustype == DMU_OT_SA);
668 669
669 670 /* setup and size spill buffer when needed */
670 671 if (spilling) {
671 672 boolean_t dummy;
672 673
673 674 if (hdl->sa_spill == NULL) {
674 675 VERIFY(dmu_spill_hold_by_bonus(hdl->sa_bonus, NULL,
675 676 &hdl->sa_spill) == 0);
676 677 }
677 678 dmu_buf_will_dirty(hdl->sa_spill, tx);
678 679
679 680 spillhdrsize = sa_find_sizes(sa, &attr_desc[i],
680 681 attr_count - i, hdl->sa_spill, SA_SPILL, &i,
681 682 &spill_used, &dummy);
682 683
683 684 if (spill_used > SPA_MAXBLOCKSIZE)
684 685 return (EFBIG);
685 686
686 687 buf_space = hdl->sa_spill->db_size - spillhdrsize;
687 688 if (BUF_SPACE_NEEDED(spill_used, spillhdrsize) >
688 689 hdl->sa_spill->db_size)
689 690 VERIFY(0 == sa_resize_spill(hdl,
690 691 BUF_SPACE_NEEDED(spill_used, spillhdrsize), tx));
691 692 }
692 693
693 694 /* setup starting pointers to lay down data */
694 695 data_start = (void *)((uintptr_t)hdl->sa_bonus->db_data + hdrsize);
695 696 sahdr = (sa_hdr_phys_t *)hdl->sa_bonus->db_data;
696 697 buftype = SA_BONUS;
697 698
698 699 if (spilling)
699 700 buf_space = (sa->sa_force_spill) ?
700 701 0 : SA_BLKPTR_SPACE - hdrsize;
701 702 else
702 703 buf_space = hdl->sa_bonus->db_size - hdrsize;
703 704
704 705 attrs_start = attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
705 706 KM_SLEEP);
706 707 lot_count = 0;
707 708
708 709 for (i = 0, len_idx = 0, hash = -1ULL; i != attr_count; i++) {
709 710 uint16_t length;
710 711
711 712 attrs[i] = attr_desc[i].sa_attr;
712 713 length = SA_REGISTERED_LEN(sa, attrs[i]);
713 714 if (length == 0)
714 715 length = attr_desc[i].sa_length;
715 716
716 717 if (buf_space < length) { /* switch to spill buffer */
717 718 VERIFY(bonustype == DMU_OT_SA);
718 719 if (buftype == SA_BONUS && !sa->sa_force_spill) {
719 720 sa_find_layout(hdl->sa_os, hash, attrs_start,
720 721 lot_count, tx, &lot);
721 722 SA_SET_HDR(sahdr, lot->lot_num, hdrsize);
722 723 }
723 724
724 725 buftype = SA_SPILL;
725 726 hash = -1ULL;
726 727 len_idx = 0;
727 728
728 729 sahdr = (sa_hdr_phys_t *)hdl->sa_spill->db_data;
729 730 sahdr->sa_magic = SA_MAGIC;
730 731 data_start = (void *)((uintptr_t)sahdr +
731 732 spillhdrsize);
732 733 attrs_start = &attrs[i];
733 734 buf_space = hdl->sa_spill->db_size - spillhdrsize;
734 735 lot_count = 0;
735 736 }
736 737 hash ^= SA_ATTR_HASH(attrs[i]);
737 738 attr_desc[i].sa_addr = data_start;
738 739 attr_desc[i].sa_size = length;
739 740 SA_COPY_DATA(attr_desc[i].sa_data_func, attr_desc[i].sa_data,
740 741 data_start, length);
741 742 if (sa->sa_attr_table[attrs[i]].sa_length == 0) {
742 743 sahdr->sa_lengths[len_idx++] = length;
743 744 }
744 745 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
745 746 length), 8);
746 747 buf_space -= P2ROUNDUP(length, 8);
747 748 lot_count++;
748 749 }
749 750
750 751 sa_find_layout(hdl->sa_os, hash, attrs_start, lot_count, tx, &lot);
751 752
752 753 /*
753 754 * Verify that old znodes always have layout number 0.
754 755 * Must be DMU_OT_SA for arbitrary layouts
755 756 */
756 757 VERIFY((bonustype == DMU_OT_ZNODE && lot->lot_num == 0) ||
757 758 (bonustype == DMU_OT_SA && lot->lot_num > 1));
758 759
759 760 if (bonustype == DMU_OT_SA) {
760 761 SA_SET_HDR(sahdr, lot->lot_num,
761 762 buftype == SA_BONUS ? hdrsize : spillhdrsize);
762 763 }
763 764
764 765 kmem_free(attrs, sizeof (sa_attr_type_t) * attr_count);
765 766 if (hdl->sa_bonus_tab) {
766 767 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
767 768 hdl->sa_bonus_tab = NULL;
768 769 }
769 770 if (!sa->sa_force_spill)
770 771 VERIFY(0 == sa_build_index(hdl, SA_BONUS));
771 772 if (hdl->sa_spill) {
772 773 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
773 774 if (!spilling) {
774 775 /*
775 776 * remove spill block that is no longer needed.
776 777 */
777 778 dmu_buf_rele(hdl->sa_spill, NULL);
778 779 hdl->sa_spill = NULL;
779 780 hdl->sa_spill_tab = NULL;
780 781 VERIFY(0 == dmu_rm_spill(hdl->sa_os,
781 782 sa_handle_object(hdl), tx));
782 783 } else {
783 784 VERIFY(0 == sa_build_index(hdl, SA_SPILL));
784 785 }
785 786 }
786 787
787 788 return (0);
788 789 }
789 790
790 791 static void
791 792 sa_free_attr_table(sa_os_t *sa)
792 793 {
793 794 int i;
794 795
795 796 if (sa->sa_attr_table == NULL)
796 797 return;
797 798
798 799 for (i = 0; i != sa->sa_num_attrs; i++) {
799 800 if (sa->sa_attr_table[i].sa_name)
800 801 kmem_free(sa->sa_attr_table[i].sa_name,
801 802 strlen(sa->sa_attr_table[i].sa_name) + 1);
802 803 }
803 804
804 805 kmem_free(sa->sa_attr_table,
805 806 sizeof (sa_attr_table_t) * sa->sa_num_attrs);
806 807
807 808 sa->sa_attr_table = NULL;
808 809 }
809 810
810 811 static int
811 812 sa_attr_table_setup(objset_t *os, sa_attr_reg_t *reg_attrs, int count)
812 813 {
813 814 sa_os_t *sa = os->os_sa;
814 815 uint64_t sa_attr_count = 0;
815 816 uint64_t sa_reg_count;
816 817 int error = 0;
817 818 uint64_t attr_value;
818 819 sa_attr_table_t *tb;
819 820 zap_cursor_t zc;
820 821 zap_attribute_t za;
821 822 int registered_count = 0;
822 823 int i;
823 824 dmu_objset_type_t ostype = dmu_objset_type(os);
824 825
825 826 sa->sa_user_table =
826 827 kmem_zalloc(count * sizeof (sa_attr_type_t), KM_SLEEP);
827 828 sa->sa_user_table_sz = count * sizeof (sa_attr_type_t);
828 829
829 830 if (sa->sa_reg_attr_obj != 0) {
830 831 error = zap_count(os, sa->sa_reg_attr_obj,
831 832 &sa_attr_count);
832 833
833 834 /*
834 835 * Make sure we retrieved a count and that it isn't zero
835 836 */
836 837 if (error || (error == 0 && sa_attr_count == 0)) {
837 838 if (error == 0)
838 839 error = EINVAL;
839 840 goto bail;
840 841 }
841 842 sa_reg_count = sa_attr_count;
842 843 }
843 844
844 845 if (ostype == DMU_OST_ZFS && sa_attr_count == 0)
845 846 sa_attr_count += sa_legacy_attr_count;
846 847
847 848 /* Allocate attribute numbers for attributes that aren't registered */
848 849 for (i = 0; i != count; i++) {
849 850 boolean_t found = B_FALSE;
850 851 int j;
851 852
852 853 if (ostype == DMU_OST_ZFS) {
853 854 for (j = 0; j != sa_legacy_attr_count; j++) {
854 855 if (strcmp(reg_attrs[i].sa_name,
855 856 sa_legacy_attrs[j].sa_name) == 0) {
856 857 sa->sa_user_table[i] =
857 858 sa_legacy_attrs[j].sa_attr;
858 859 found = B_TRUE;
859 860 }
860 861 }
861 862 }
862 863 if (found)
863 864 continue;
864 865
865 866 if (sa->sa_reg_attr_obj)
866 867 error = zap_lookup(os, sa->sa_reg_attr_obj,
867 868 reg_attrs[i].sa_name, 8, 1, &attr_value);
868 869 else
869 870 error = ENOENT;
870 871 switch (error) {
871 872 case ENOENT:
872 873 sa->sa_user_table[i] = (sa_attr_type_t)sa_attr_count;
873 874 sa_attr_count++;
874 875 break;
875 876 case 0:
876 877 sa->sa_user_table[i] = ATTR_NUM(attr_value);
877 878 break;
878 879 default:
879 880 goto bail;
880 881 }
881 882 }
882 883
883 884 sa->sa_num_attrs = sa_attr_count;
884 885 tb = sa->sa_attr_table =
885 886 kmem_zalloc(sizeof (sa_attr_table_t) * sa_attr_count, KM_SLEEP);
886 887
887 888 /*
888 889 * Attribute table is constructed from requested attribute list,
889 890 * previously foreign registered attributes, and also the legacy
890 891 * ZPL set of attributes.
891 892 */
892 893
893 894 if (sa->sa_reg_attr_obj) {
894 895 for (zap_cursor_init(&zc, os, sa->sa_reg_attr_obj);
895 896 (error = zap_cursor_retrieve(&zc, &za)) == 0;
896 897 zap_cursor_advance(&zc)) {
897 898 uint64_t value;
898 899 value = za.za_first_integer;
899 900
900 901 registered_count++;
901 902 tb[ATTR_NUM(value)].sa_attr = ATTR_NUM(value);
902 903 tb[ATTR_NUM(value)].sa_length = ATTR_LENGTH(value);
903 904 tb[ATTR_NUM(value)].sa_byteswap = ATTR_BSWAP(value);
904 905 tb[ATTR_NUM(value)].sa_registered = B_TRUE;
905 906
906 907 if (tb[ATTR_NUM(value)].sa_name) {
907 908 continue;
908 909 }
909 910 tb[ATTR_NUM(value)].sa_name =
910 911 kmem_zalloc(strlen(za.za_name) +1, KM_SLEEP);
911 912 (void) strlcpy(tb[ATTR_NUM(value)].sa_name, za.za_name,
912 913 strlen(za.za_name) +1);
913 914 }
914 915 zap_cursor_fini(&zc);
915 916 /*
916 917 * Make sure we processed the correct number of registered
917 918 * attributes
918 919 */
919 920 if (registered_count != sa_reg_count) {
920 921 ASSERT(error != 0);
921 922 goto bail;
922 923 }
923 924
924 925 }
925 926
926 927 if (ostype == DMU_OST_ZFS) {
927 928 for (i = 0; i != sa_legacy_attr_count; i++) {
928 929 if (tb[i].sa_name)
929 930 continue;
930 931 tb[i].sa_attr = sa_legacy_attrs[i].sa_attr;
931 932 tb[i].sa_length = sa_legacy_attrs[i].sa_length;
932 933 tb[i].sa_byteswap = sa_legacy_attrs[i].sa_byteswap;
933 934 tb[i].sa_registered = B_FALSE;
934 935 tb[i].sa_name =
935 936 kmem_zalloc(strlen(sa_legacy_attrs[i].sa_name) +1,
936 937 KM_SLEEP);
937 938 (void) strlcpy(tb[i].sa_name,
938 939 sa_legacy_attrs[i].sa_name,
939 940 strlen(sa_legacy_attrs[i].sa_name) + 1);
940 941 }
941 942 }
942 943
943 944 for (i = 0; i != count; i++) {
944 945 sa_attr_type_t attr_id;
945 946
946 947 attr_id = sa->sa_user_table[i];
947 948 if (tb[attr_id].sa_name)
948 949 continue;
949 950
950 951 tb[attr_id].sa_length = reg_attrs[i].sa_length;
951 952 tb[attr_id].sa_byteswap = reg_attrs[i].sa_byteswap;
952 953 tb[attr_id].sa_attr = attr_id;
953 954 tb[attr_id].sa_name =
954 955 kmem_zalloc(strlen(reg_attrs[i].sa_name) + 1, KM_SLEEP);
955 956 (void) strlcpy(tb[attr_id].sa_name, reg_attrs[i].sa_name,
956 957 strlen(reg_attrs[i].sa_name) + 1);
957 958 }
958 959
959 960 sa->sa_need_attr_registration =
960 961 (sa_attr_count != registered_count);
961 962
962 963 return (0);
963 964 bail:
964 965 kmem_free(sa->sa_user_table, count * sizeof (sa_attr_type_t));
965 966 sa->sa_user_table = NULL;
966 967 sa_free_attr_table(sa);
967 968 return ((error != 0) ? error : EINVAL);
968 969 }
969 970
970 971 int
971 972 sa_setup(objset_t *os, uint64_t sa_obj, sa_attr_reg_t *reg_attrs, int count,
972 973 sa_attr_type_t **user_table)
973 974 {
974 975 zap_cursor_t zc;
975 976 zap_attribute_t za;
976 977 sa_os_t *sa;
977 978 dmu_objset_type_t ostype = dmu_objset_type(os);
978 979 sa_attr_type_t *tb;
979 980 int error;
980 981
981 982 mutex_enter(&os->os_lock);
982 983 if (os->os_sa) {
983 984 mutex_enter(&os->os_sa->sa_lock);
984 985 mutex_exit(&os->os_lock);
985 986 tb = os->os_sa->sa_user_table;
986 987 mutex_exit(&os->os_sa->sa_lock);
987 988 *user_table = tb;
988 989 return (0);
989 990 }
990 991
991 992 sa = kmem_zalloc(sizeof (sa_os_t), KM_SLEEP);
992 993 mutex_init(&sa->sa_lock, NULL, MUTEX_DEFAULT, NULL);
993 994 sa->sa_master_obj = sa_obj;
994 995
995 996 os->os_sa = sa;
996 997 mutex_enter(&sa->sa_lock);
997 998 mutex_exit(&os->os_lock);
998 999 avl_create(&sa->sa_layout_num_tree, layout_num_compare,
999 1000 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_num_node));
1000 1001 avl_create(&sa->sa_layout_hash_tree, layout_hash_compare,
1001 1002 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_hash_node));
1002 1003
1003 1004 if (sa_obj) {
1004 1005 error = zap_lookup(os, sa_obj, SA_LAYOUTS,
1005 1006 8, 1, &sa->sa_layout_attr_obj);
1006 1007 if (error != 0 && error != ENOENT)
1007 1008 goto fail;
1008 1009 error = zap_lookup(os, sa_obj, SA_REGISTRY,
1009 1010 8, 1, &sa->sa_reg_attr_obj);
1010 1011 if (error != 0 && error != ENOENT)
1011 1012 goto fail;
1012 1013 }
1013 1014
1014 1015 if ((error = sa_attr_table_setup(os, reg_attrs, count)) != 0)
1015 1016 goto fail;
1016 1017
1017 1018 if (sa->sa_layout_attr_obj != 0) {
1018 1019 uint64_t layout_count;
1019 1020
1020 1021 error = zap_count(os, sa->sa_layout_attr_obj,
1021 1022 &layout_count);
1022 1023
1023 1024 /*
1024 1025 * Layout number count should be > 0
1025 1026 */
1026 1027 if (error || (error == 0 && layout_count == 0)) {
1027 1028 if (error == 0)
1028 1029 error = EINVAL;
1029 1030 goto fail;
1030 1031 }
1031 1032
1032 1033 for (zap_cursor_init(&zc, os, sa->sa_layout_attr_obj);
1033 1034 (error = zap_cursor_retrieve(&zc, &za)) == 0;
1034 1035 zap_cursor_advance(&zc)) {
1035 1036 sa_attr_type_t *lot_attrs;
1036 1037 uint64_t lot_num;
1037 1038
1038 1039 lot_attrs = kmem_zalloc(sizeof (sa_attr_type_t) *
1039 1040 za.za_num_integers, KM_SLEEP);
1040 1041
1041 1042 if ((error = (zap_lookup(os, sa->sa_layout_attr_obj,
1042 1043 za.za_name, 2, za.za_num_integers,
1043 1044 lot_attrs))) != 0) {
1044 1045 kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
1045 1046 za.za_num_integers);
1046 1047 break;
1047 1048 }
1048 1049 VERIFY(ddi_strtoull(za.za_name, NULL, 10,
1049 1050 (unsigned long long *)&lot_num) == 0);
1050 1051
1051 1052 (void) sa_add_layout_entry(os, lot_attrs,
1052 1053 za.za_num_integers, lot_num,
1053 1054 sa_layout_info_hash(lot_attrs,
1054 1055 za.za_num_integers), B_FALSE, NULL);
1055 1056 kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
1056 1057 za.za_num_integers);
1057 1058 }
1058 1059 zap_cursor_fini(&zc);
1059 1060
1060 1061 /*
1061 1062 * Make sure layout count matches number of entries added
1062 1063 * to AVL tree
1063 1064 */
1064 1065 if (avl_numnodes(&sa->sa_layout_num_tree) != layout_count) {
1065 1066 ASSERT(error != 0);
1066 1067 goto fail;
1067 1068 }
1068 1069 }
1069 1070
1070 1071 /* Add special layout number for old ZNODES */
1071 1072 if (ostype == DMU_OST_ZFS) {
1072 1073 (void) sa_add_layout_entry(os, sa_legacy_zpl_layout,
1073 1074 sa_legacy_attr_count, 0,
1074 1075 sa_layout_info_hash(sa_legacy_zpl_layout,
1075 1076 sa_legacy_attr_count), B_FALSE, NULL);
1076 1077
1077 1078 (void) sa_add_layout_entry(os, sa_dummy_zpl_layout, 0, 1,
1078 1079 0, B_FALSE, NULL);
1079 1080 }
1080 1081 *user_table = os->os_sa->sa_user_table;
1081 1082 mutex_exit(&sa->sa_lock);
1082 1083 return (0);
1083 1084 fail:
1084 1085 os->os_sa = NULL;
1085 1086 sa_free_attr_table(sa);
1086 1087 if (sa->sa_user_table)
1087 1088 kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
1088 1089 mutex_exit(&sa->sa_lock);
1089 1090 kmem_free(sa, sizeof (sa_os_t));
1090 1091 return ((error == ECKSUM) ? EIO : error);
1091 1092 }
1092 1093
1093 1094 void
1094 1095 sa_tear_down(objset_t *os)
1095 1096 {
1096 1097 sa_os_t *sa = os->os_sa;
1097 1098 sa_lot_t *layout;
1098 1099 void *cookie;
1099 1100
1100 1101 kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
1101 1102
1102 1103 /* Free up attr table */
1103 1104
1104 1105 sa_free_attr_table(sa);
1105 1106
1106 1107 cookie = NULL;
1107 1108 while (layout = avl_destroy_nodes(&sa->sa_layout_hash_tree, &cookie)) {
1108 1109 sa_idx_tab_t *tab;
1109 1110 while (tab = list_head(&layout->lot_idx_tab)) {
1110 1111 ASSERT(refcount_count(&tab->sa_refcount));
1111 1112 sa_idx_tab_rele(os, tab);
1112 1113 }
1113 1114 }
1114 1115
1115 1116 cookie = NULL;
1116 1117 while (layout = avl_destroy_nodes(&sa->sa_layout_num_tree, &cookie)) {
1117 1118 kmem_free(layout->lot_attrs,
1118 1119 sizeof (sa_attr_type_t) * layout->lot_attr_count);
1119 1120 kmem_free(layout, sizeof (sa_lot_t));
1120 1121 }
1121 1122
1122 1123 avl_destroy(&sa->sa_layout_hash_tree);
1123 1124 avl_destroy(&sa->sa_layout_num_tree);
1124 1125
1125 1126 kmem_free(sa, sizeof (sa_os_t));
1126 1127 os->os_sa = NULL;
1127 1128 }
1128 1129
1129 1130 void
1130 1131 sa_build_idx_tab(void *hdr, void *attr_addr, sa_attr_type_t attr,
1131 1132 uint16_t length, int length_idx, boolean_t var_length, void *userp)
1132 1133 {
1133 1134 sa_idx_tab_t *idx_tab = userp;
1134 1135
1135 1136 if (var_length) {
1136 1137 ASSERT(idx_tab->sa_variable_lengths);
1137 1138 idx_tab->sa_variable_lengths[length_idx] = length;
1138 1139 }
1139 1140 TOC_ATTR_ENCODE(idx_tab->sa_idx_tab[attr], length_idx,
1140 1141 (uint32_t)((uintptr_t)attr_addr - (uintptr_t)hdr));
1141 1142 }
1142 1143
1143 1144 static void
1144 1145 sa_attr_iter(objset_t *os, sa_hdr_phys_t *hdr, dmu_object_type_t type,
1145 1146 sa_iterfunc_t func, sa_lot_t *tab, void *userp)
1146 1147 {
1147 1148 void *data_start;
1148 1149 sa_lot_t *tb = tab;
1149 1150 sa_lot_t search;
1150 1151 avl_index_t loc;
1151 1152 sa_os_t *sa = os->os_sa;
1152 1153 int i;
1153 1154 uint16_t *length_start = NULL;
1154 1155 uint8_t length_idx = 0;
1155 1156
1156 1157 if (tab == NULL) {
1157 1158 search.lot_num = SA_LAYOUT_NUM(hdr, type);
1158 1159 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
1159 1160 ASSERT(tb);
1160 1161 }
1161 1162
1162 1163 if (IS_SA_BONUSTYPE(type)) {
1163 1164 data_start = (void *)P2ROUNDUP(((uintptr_t)hdr +
1164 1165 offsetof(sa_hdr_phys_t, sa_lengths) +
1165 1166 (sizeof (uint16_t) * tb->lot_var_sizes)), 8);
1166 1167 length_start = hdr->sa_lengths;
1167 1168 } else {
1168 1169 data_start = hdr;
1169 1170 }
1170 1171
1171 1172 for (i = 0; i != tb->lot_attr_count; i++) {
1172 1173 int attr_length, reg_length;
1173 1174 uint8_t idx_len;
1174 1175
1175 1176 reg_length = sa->sa_attr_table[tb->lot_attrs[i]].sa_length;
1176 1177 if (reg_length) {
1177 1178 attr_length = reg_length;
1178 1179 idx_len = 0;
1179 1180 } else {
1180 1181 attr_length = length_start[length_idx];
1181 1182 idx_len = length_idx++;
1182 1183 }
1183 1184
1184 1185 func(hdr, data_start, tb->lot_attrs[i], attr_length,
1185 1186 idx_len, reg_length == 0 ? B_TRUE : B_FALSE, userp);
1186 1187
1187 1188 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
1188 1189 attr_length), 8);
1189 1190 }
1190 1191 }
1191 1192
1192 1193 /*ARGSUSED*/
1193 1194 void
1194 1195 sa_byteswap_cb(void *hdr, void *attr_addr, sa_attr_type_t attr,
1195 1196 uint16_t length, int length_idx, boolean_t variable_length, void *userp)
1196 1197 {
1197 1198 sa_handle_t *hdl = userp;
1198 1199 sa_os_t *sa = hdl->sa_os->os_sa;
1199 1200
1200 1201 sa_bswap_table[sa->sa_attr_table[attr].sa_byteswap](attr_addr, length);
1201 1202 }
1202 1203
1203 1204 void
1204 1205 sa_byteswap(sa_handle_t *hdl, sa_buf_type_t buftype)
1205 1206 {
1206 1207 sa_hdr_phys_t *sa_hdr_phys = SA_GET_HDR(hdl, buftype);
1207 1208 dmu_buf_impl_t *db;
1208 1209 sa_os_t *sa = hdl->sa_os->os_sa;
1209 1210 int num_lengths = 1;
1210 1211 int i;
1211 1212
1212 1213 ASSERT(MUTEX_HELD(&sa->sa_lock));
1213 1214 if (sa_hdr_phys->sa_magic == SA_MAGIC)
1214 1215 return;
1215 1216
1216 1217 db = SA_GET_DB(hdl, buftype);
1217 1218
1218 1219 if (buftype == SA_SPILL) {
1219 1220 arc_release(db->db_buf, NULL);
1220 1221 arc_buf_thaw(db->db_buf);
1221 1222 }
1222 1223
1223 1224 sa_hdr_phys->sa_magic = BSWAP_32(sa_hdr_phys->sa_magic);
1224 1225 sa_hdr_phys->sa_layout_info = BSWAP_16(sa_hdr_phys->sa_layout_info);
1225 1226
1226 1227 /*
1227 1228 * Determine number of variable lenghts in header
1228 1229 * The standard 8 byte header has one for free and a
1229 1230 * 16 byte header would have 4 + 1;
1230 1231 */
1231 1232 if (SA_HDR_SIZE(sa_hdr_phys) > 8)
1232 1233 num_lengths += (SA_HDR_SIZE(sa_hdr_phys) - 8) >> 1;
1233 1234 for (i = 0; i != num_lengths; i++)
1234 1235 sa_hdr_phys->sa_lengths[i] =
1235 1236 BSWAP_16(sa_hdr_phys->sa_lengths[i]);
1236 1237
1237 1238 sa_attr_iter(hdl->sa_os, sa_hdr_phys, DMU_OT_SA,
1238 1239 sa_byteswap_cb, NULL, hdl);
1239 1240
1240 1241 if (buftype == SA_SPILL)
1241 1242 arc_buf_freeze(((dmu_buf_impl_t *)hdl->sa_spill)->db_buf);
1242 1243 }
1243 1244
1244 1245 static int
1245 1246 sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype)
1246 1247 {
1247 1248 sa_hdr_phys_t *sa_hdr_phys;
1248 1249 dmu_buf_impl_t *db = SA_GET_DB(hdl, buftype);
1249 1250 dmu_object_type_t bonustype = SA_BONUSTYPE_FROM_DB(db);
1250 1251 sa_os_t *sa = hdl->sa_os->os_sa;
1251 1252 sa_idx_tab_t *idx_tab;
1252 1253
1253 1254 sa_hdr_phys = SA_GET_HDR(hdl, buftype);
1254 1255
1255 1256 mutex_enter(&sa->sa_lock);
1256 1257
1257 1258 /* Do we need to byteswap? */
1258 1259
1259 1260 /* only check if not old znode */
1260 1261 if (IS_SA_BONUSTYPE(bonustype) && sa_hdr_phys->sa_magic != SA_MAGIC &&
1261 1262 sa_hdr_phys->sa_magic != 0) {
1262 1263 VERIFY(BSWAP_32(sa_hdr_phys->sa_magic) == SA_MAGIC);
1263 1264 sa_byteswap(hdl, buftype);
1264 1265 }
1265 1266
1266 1267 idx_tab = sa_find_idx_tab(hdl->sa_os, bonustype, sa_hdr_phys);
1267 1268
1268 1269 if (buftype == SA_BONUS)
1269 1270 hdl->sa_bonus_tab = idx_tab;
1270 1271 else
1271 1272 hdl->sa_spill_tab = idx_tab;
1272 1273
1273 1274 mutex_exit(&sa->sa_lock);
1274 1275 return (0);
1275 1276 }
1276 1277
1277 1278 /*ARGSUSED*/
1278 1279 void
1279 1280 sa_evict(dmu_buf_t *db, void *sap)
1280 1281 {
1281 1282 panic("evicting sa dbuf %p\n", (void *)db);
1282 1283 }
1283 1284
1284 1285 static void
1285 1286 sa_idx_tab_rele(objset_t *os, void *arg)
1286 1287 {
1287 1288 sa_os_t *sa = os->os_sa;
1288 1289 sa_idx_tab_t *idx_tab = arg;
1289 1290
1290 1291 if (idx_tab == NULL)
1291 1292 return;
1292 1293
1293 1294 mutex_enter(&sa->sa_lock);
1294 1295 if (refcount_remove(&idx_tab->sa_refcount, NULL) == 0) {
1295 1296 list_remove(&idx_tab->sa_layout->lot_idx_tab, idx_tab);
1296 1297 if (idx_tab->sa_variable_lengths)
1297 1298 kmem_free(idx_tab->sa_variable_lengths,
1298 1299 sizeof (uint16_t) *
1299 1300 idx_tab->sa_layout->lot_var_sizes);
1300 1301 refcount_destroy(&idx_tab->sa_refcount);
1301 1302 kmem_free(idx_tab->sa_idx_tab,
1302 1303 sizeof (uint32_t) * sa->sa_num_attrs);
1303 1304 kmem_free(idx_tab, sizeof (sa_idx_tab_t));
1304 1305 }
1305 1306 mutex_exit(&sa->sa_lock);
1306 1307 }
1307 1308
1308 1309 static void
1309 1310 sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab)
1310 1311 {
1311 1312 sa_os_t *sa = os->os_sa;
1312 1313
1313 1314 ASSERT(MUTEX_HELD(&sa->sa_lock));
1314 1315 (void) refcount_add(&idx_tab->sa_refcount, NULL);
1315 1316 }
1316 1317
1317 1318 void
1318 1319 sa_handle_destroy(sa_handle_t *hdl)
1319 1320 {
1320 1321 mutex_enter(&hdl->sa_lock);
1321 1322 (void) dmu_buf_update_user((dmu_buf_t *)hdl->sa_bonus, hdl,
1322 1323 NULL, NULL, NULL);
1323 1324
1324 1325 if (hdl->sa_bonus_tab) {
1325 1326 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
1326 1327 hdl->sa_bonus_tab = NULL;
1327 1328 }
1328 1329 if (hdl->sa_spill_tab) {
1329 1330 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
1330 1331 hdl->sa_spill_tab = NULL;
1331 1332 }
1332 1333
1333 1334 dmu_buf_rele(hdl->sa_bonus, NULL);
1334 1335
1335 1336 if (hdl->sa_spill)
1336 1337 dmu_buf_rele((dmu_buf_t *)hdl->sa_spill, NULL);
1337 1338 mutex_exit(&hdl->sa_lock);
1338 1339
1339 1340 kmem_cache_free(sa_cache, hdl);
1340 1341 }
1341 1342
1342 1343 int
1343 1344 sa_handle_get_from_db(objset_t *os, dmu_buf_t *db, void *userp,
1344 1345 sa_handle_type_t hdl_type, sa_handle_t **handlepp)
1345 1346 {
1346 1347 int error = 0;
1347 1348 dmu_object_info_t doi;
1348 1349 sa_handle_t *handle;
1349 1350
1350 1351 #ifdef ZFS_DEBUG
1351 1352 dmu_object_info_from_db(db, &doi);
1352 1353 ASSERT(doi.doi_bonus_type == DMU_OT_SA ||
1353 1354 doi.doi_bonus_type == DMU_OT_ZNODE);
1354 1355 #endif
1355 1356 /* find handle, if it exists */
1356 1357 /* if one doesn't exist then create a new one, and initialize it */
1357 1358
1358 1359 handle = (hdl_type == SA_HDL_SHARED) ? dmu_buf_get_user(db) : NULL;
1359 1360 if (handle == NULL) {
1360 1361 sa_handle_t *newhandle;
1361 1362 handle = kmem_cache_alloc(sa_cache, KM_SLEEP);
1362 1363 handle->sa_userp = userp;
1363 1364 handle->sa_bonus = db;
1364 1365 handle->sa_os = os;
1365 1366 handle->sa_spill = NULL;
1366 1367
1367 1368 error = sa_build_index(handle, SA_BONUS);
1368 1369 newhandle = (hdl_type == SA_HDL_SHARED) ?
1369 1370 dmu_buf_set_user_ie(db, handle,
1370 1371 NULL, sa_evict) : NULL;
1371 1372
1372 1373 if (newhandle != NULL) {
1373 1374 kmem_cache_free(sa_cache, handle);
1374 1375 handle = newhandle;
1375 1376 }
1376 1377 }
1377 1378 *handlepp = handle;
1378 1379
1379 1380 return (error);
1380 1381 }
1381 1382
1382 1383 int
1383 1384 sa_handle_get(objset_t *objset, uint64_t objid, void *userp,
1384 1385 sa_handle_type_t hdl_type, sa_handle_t **handlepp)
1385 1386 {
1386 1387 dmu_buf_t *db;
1387 1388 int error;
1388 1389
1389 1390 if (error = dmu_bonus_hold(objset, objid, NULL, &db))
1390 1391 return (error);
1391 1392
1392 1393 return (sa_handle_get_from_db(objset, db, userp, hdl_type,
1393 1394 handlepp));
1394 1395 }
1395 1396
1396 1397 int
1397 1398 sa_buf_hold(objset_t *objset, uint64_t obj_num, void *tag, dmu_buf_t **db)
1398 1399 {
1399 1400 return (dmu_bonus_hold(objset, obj_num, tag, db));
1400 1401 }
1401 1402
1402 1403 void
1403 1404 sa_buf_rele(dmu_buf_t *db, void *tag)
1404 1405 {
1405 1406 dmu_buf_rele(db, tag);
1406 1407 }
1407 1408
1408 1409 int
1409 1410 sa_lookup_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count)
1410 1411 {
1411 1412 ASSERT(hdl);
1412 1413 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1413 1414 return (sa_attr_op(hdl, bulk, count, SA_LOOKUP, NULL));
1414 1415 }
1415 1416
1416 1417 int
1417 1418 sa_lookup(sa_handle_t *hdl, sa_attr_type_t attr, void *buf, uint32_t buflen)
1418 1419 {
1419 1420 int error;
1420 1421 sa_bulk_attr_t bulk;
1421 1422
1422 1423 bulk.sa_attr = attr;
1423 1424 bulk.sa_data = buf;
1424 1425 bulk.sa_length = buflen;
1425 1426 bulk.sa_data_func = NULL;
1426 1427
1427 1428 ASSERT(hdl);
1428 1429 mutex_enter(&hdl->sa_lock);
1429 1430 error = sa_lookup_impl(hdl, &bulk, 1);
1430 1431 mutex_exit(&hdl->sa_lock);
1431 1432 return (error);
1432 1433 }
1433 1434
1434 1435 #ifdef _KERNEL
1435 1436 int
1436 1437 sa_lookup_uio(sa_handle_t *hdl, sa_attr_type_t attr, uio_t *uio)
1437 1438 {
1438 1439 int error;
1439 1440 sa_bulk_attr_t bulk;
1440 1441
1441 1442 bulk.sa_data = NULL;
1442 1443 bulk.sa_attr = attr;
1443 1444 bulk.sa_data_func = NULL;
1444 1445
1445 1446 ASSERT(hdl);
1446 1447
1447 1448 mutex_enter(&hdl->sa_lock);
1448 1449 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) == 0) {
1449 1450 error = uiomove((void *)bulk.sa_addr, MIN(bulk.sa_size,
1450 1451 uio->uio_resid), UIO_READ, uio);
1451 1452 }
1452 1453 mutex_exit(&hdl->sa_lock);
1453 1454 return (error);
1454 1455
1455 1456 }
1456 1457 #endif
1457 1458
1458 1459 void *
1459 1460 sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype, void *data)
1460 1461 {
1461 1462 sa_idx_tab_t *idx_tab;
1462 1463 sa_hdr_phys_t *hdr = (sa_hdr_phys_t *)data;
1463 1464 sa_os_t *sa = os->os_sa;
1464 1465 sa_lot_t *tb, search;
1465 1466 avl_index_t loc;
1466 1467
1467 1468 /*
1468 1469 * Deterimine layout number. If SA node and header == 0 then
1469 1470 * force the index table to the dummy "1" empty layout.
1470 1471 *
1471 1472 * The layout number would only be zero for a newly created file
1472 1473 * that has not added any attributes yet, or with crypto enabled which
1473 1474 * doesn't write any attributes to the bonus buffer.
1474 1475 */
1475 1476
1476 1477 search.lot_num = SA_LAYOUT_NUM(hdr, bonustype);
1477 1478
1478 1479 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
1479 1480
1480 1481 /* Verify header size is consistent with layout information */
1481 1482 ASSERT(tb);
1482 1483 ASSERT(IS_SA_BONUSTYPE(bonustype) &&
1483 1484 SA_HDR_SIZE_MATCH_LAYOUT(hdr, tb) || !IS_SA_BONUSTYPE(bonustype) ||
1484 1485 (IS_SA_BONUSTYPE(bonustype) && hdr->sa_layout_info == 0));
1485 1486
1486 1487 /*
1487 1488 * See if any of the already existing TOC entries can be reused?
1488 1489 */
1489 1490
1490 1491 for (idx_tab = list_head(&tb->lot_idx_tab); idx_tab;
1491 1492 idx_tab = list_next(&tb->lot_idx_tab, idx_tab)) {
1492 1493 boolean_t valid_idx = B_TRUE;
1493 1494 int i;
1494 1495
1495 1496 if (tb->lot_var_sizes != 0 &&
1496 1497 idx_tab->sa_variable_lengths != NULL) {
1497 1498 for (i = 0; i != tb->lot_var_sizes; i++) {
1498 1499 if (hdr->sa_lengths[i] !=
1499 1500 idx_tab->sa_variable_lengths[i]) {
1500 1501 valid_idx = B_FALSE;
1501 1502 break;
1502 1503 }
1503 1504 }
1504 1505 }
1505 1506 if (valid_idx) {
1506 1507 sa_idx_tab_hold(os, idx_tab);
1507 1508 return (idx_tab);
1508 1509 }
1509 1510 }
1510 1511
1511 1512 /* No such luck, create a new entry */
1512 1513 idx_tab = kmem_zalloc(sizeof (sa_idx_tab_t), KM_SLEEP);
1513 1514 idx_tab->sa_idx_tab =
1514 1515 kmem_zalloc(sizeof (uint32_t) * sa->sa_num_attrs, KM_SLEEP);
1515 1516 idx_tab->sa_layout = tb;
1516 1517 refcount_create(&idx_tab->sa_refcount);
1517 1518 if (tb->lot_var_sizes)
1518 1519 idx_tab->sa_variable_lengths = kmem_alloc(sizeof (uint16_t) *
1519 1520 tb->lot_var_sizes, KM_SLEEP);
1520 1521
1521 1522 sa_attr_iter(os, hdr, bonustype, sa_build_idx_tab,
1522 1523 tb, idx_tab);
1523 1524 sa_idx_tab_hold(os, idx_tab); /* one hold for consumer */
1524 1525 sa_idx_tab_hold(os, idx_tab); /* one for layout */
1525 1526 list_insert_tail(&tb->lot_idx_tab, idx_tab);
1526 1527 return (idx_tab);
1527 1528 }
1528 1529
1529 1530 void
1530 1531 sa_default_locator(void **dataptr, uint32_t *len, uint32_t total_len,
1531 1532 boolean_t start, void *userdata)
1532 1533 {
1533 1534 ASSERT(start);
1534 1535
1535 1536 *dataptr = userdata;
1536 1537 *len = total_len;
1537 1538 }
1538 1539
1539 1540 static void
1540 1541 sa_attr_register_sync(sa_handle_t *hdl, dmu_tx_t *tx)
1541 1542 {
1542 1543 uint64_t attr_value = 0;
1543 1544 sa_os_t *sa = hdl->sa_os->os_sa;
1544 1545 sa_attr_table_t *tb = sa->sa_attr_table;
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1545 1546 int i;
1546 1547
1547 1548 mutex_enter(&sa->sa_lock);
1548 1549
1549 1550 if (!sa->sa_need_attr_registration || sa->sa_master_obj == NULL) {
1550 1551 mutex_exit(&sa->sa_lock);
1551 1552 return;
1552 1553 }
1553 1554
1554 1555 if (sa->sa_reg_attr_obj == NULL) {
1555 - sa->sa_reg_attr_obj = zap_create(hdl->sa_os,
1556 - DMU_OT_SA_ATTR_REGISTRATION, DMU_OT_NONE, 0, tx);
1557 - VERIFY(zap_add(hdl->sa_os, sa->sa_master_obj,
1558 - SA_REGISTRY, 8, 1, &sa->sa_reg_attr_obj, tx) == 0);
1556 + sa->sa_reg_attr_obj = zap_create_link(hdl->sa_os,
1557 + DMU_OT_SA_ATTR_REGISTRATION,
1558 + sa->sa_master_obj, SA_REGISTRY, tx);
1559 1559 }
1560 1560 for (i = 0; i != sa->sa_num_attrs; i++) {
1561 1561 if (sa->sa_attr_table[i].sa_registered)
1562 1562 continue;
1563 1563 ATTR_ENCODE(attr_value, tb[i].sa_attr, tb[i].sa_length,
1564 1564 tb[i].sa_byteswap);
1565 1565 VERIFY(0 == zap_update(hdl->sa_os, sa->sa_reg_attr_obj,
1566 1566 tb[i].sa_name, 8, 1, &attr_value, tx));
1567 1567 tb[i].sa_registered = B_TRUE;
1568 1568 }
1569 1569 sa->sa_need_attr_registration = B_FALSE;
1570 1570 mutex_exit(&sa->sa_lock);
1571 1571 }
1572 1572
1573 1573 /*
1574 1574 * Replace all attributes with attributes specified in template.
1575 1575 * If dnode had a spill buffer then those attributes will be
1576 1576 * also be replaced, possibly with just an empty spill block
1577 1577 *
1578 1578 * This interface is intended to only be used for bulk adding of
1579 1579 * attributes for a new file. It will also be used by the ZPL
1580 1580 * when converting and old formatted znode to native SA support.
1581 1581 */
1582 1582 int
1583 1583 sa_replace_all_by_template_locked(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
1584 1584 int attr_count, dmu_tx_t *tx)
1585 1585 {
1586 1586 sa_os_t *sa = hdl->sa_os->os_sa;
1587 1587
1588 1588 if (sa->sa_need_attr_registration)
1589 1589 sa_attr_register_sync(hdl, tx);
1590 1590 return (sa_build_layouts(hdl, attr_desc, attr_count, tx));
1591 1591 }
1592 1592
1593 1593 int
1594 1594 sa_replace_all_by_template(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
1595 1595 int attr_count, dmu_tx_t *tx)
1596 1596 {
1597 1597 int error;
1598 1598
1599 1599 mutex_enter(&hdl->sa_lock);
1600 1600 error = sa_replace_all_by_template_locked(hdl, attr_desc,
1601 1601 attr_count, tx);
1602 1602 mutex_exit(&hdl->sa_lock);
1603 1603 return (error);
1604 1604 }
1605 1605
1606 1606 /*
1607 1607 * add/remove/replace a single attribute and then rewrite the entire set
1608 1608 * of attributes.
1609 1609 */
1610 1610 static int
1611 1611 sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
1612 1612 sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
1613 1613 uint16_t buflen, dmu_tx_t *tx)
1614 1614 {
1615 1615 sa_os_t *sa = hdl->sa_os->os_sa;
1616 1616 dmu_buf_impl_t *db = (dmu_buf_impl_t *)hdl->sa_bonus;
1617 1617 dnode_t *dn;
1618 1618 sa_bulk_attr_t *attr_desc;
1619 1619 void *old_data[2];
1620 1620 int bonus_attr_count = 0;
1621 1621 int bonus_data_size, spill_data_size;
1622 1622 int spill_attr_count = 0;
1623 1623 int error;
1624 1624 uint16_t length;
1625 1625 int i, j, k, length_idx;
1626 1626 sa_hdr_phys_t *hdr;
1627 1627 sa_idx_tab_t *idx_tab;
1628 1628 int attr_count;
1629 1629 int count;
1630 1630
1631 1631 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1632 1632
1633 1633 /* First make of copy of the old data */
1634 1634
1635 1635 DB_DNODE_ENTER(db);
1636 1636 dn = DB_DNODE(db);
1637 1637 if (dn->dn_bonuslen != 0) {
1638 1638 bonus_data_size = hdl->sa_bonus->db_size;
1639 1639 old_data[0] = kmem_alloc(bonus_data_size, KM_SLEEP);
1640 1640 bcopy(hdl->sa_bonus->db_data, old_data[0],
1641 1641 hdl->sa_bonus->db_size);
1642 1642 bonus_attr_count = hdl->sa_bonus_tab->sa_layout->lot_attr_count;
1643 1643 } else {
1644 1644 old_data[0] = NULL;
1645 1645 }
1646 1646 DB_DNODE_EXIT(db);
1647 1647
1648 1648 /* Bring spill buffer online if it isn't currently */
1649 1649
1650 1650 if ((error = sa_get_spill(hdl)) == 0) {
1651 1651 spill_data_size = hdl->sa_spill->db_size;
1652 1652 old_data[1] = kmem_alloc(spill_data_size, KM_SLEEP);
1653 1653 bcopy(hdl->sa_spill->db_data, old_data[1],
1654 1654 hdl->sa_spill->db_size);
1655 1655 spill_attr_count =
1656 1656 hdl->sa_spill_tab->sa_layout->lot_attr_count;
1657 1657 } else if (error && error != ENOENT) {
1658 1658 if (old_data[0])
1659 1659 kmem_free(old_data[0], bonus_data_size);
1660 1660 return (error);
1661 1661 } else {
1662 1662 old_data[1] = NULL;
1663 1663 }
1664 1664
1665 1665 /* build descriptor of all attributes */
1666 1666
1667 1667 attr_count = bonus_attr_count + spill_attr_count;
1668 1668 if (action == SA_ADD)
1669 1669 attr_count++;
1670 1670 else if (action == SA_REMOVE)
1671 1671 attr_count--;
1672 1672
1673 1673 attr_desc = kmem_zalloc(sizeof (sa_bulk_attr_t) * attr_count, KM_SLEEP);
1674 1674
1675 1675 /*
1676 1676 * loop through bonus and spill buffer if it exists, and
1677 1677 * build up new attr_descriptor to reset the attributes
1678 1678 */
1679 1679 k = j = 0;
1680 1680 count = bonus_attr_count;
1681 1681 hdr = SA_GET_HDR(hdl, SA_BONUS);
1682 1682 idx_tab = SA_IDX_TAB_GET(hdl, SA_BONUS);
1683 1683 for (; k != 2; k++) {
1684 1684 /* iterate over each attribute in layout */
1685 1685 for (i = 0, length_idx = 0; i != count; i++) {
1686 1686 sa_attr_type_t attr;
1687 1687
1688 1688 attr = idx_tab->sa_layout->lot_attrs[i];
1689 1689 if (attr == newattr) {
1690 1690 if (action == SA_REMOVE) {
1691 1691 j++;
1692 1692 continue;
1693 1693 }
1694 1694 ASSERT(SA_REGISTERED_LEN(sa, attr) == 0);
1695 1695 ASSERT(action == SA_REPLACE);
1696 1696 SA_ADD_BULK_ATTR(attr_desc, j, attr,
1697 1697 locator, datastart, buflen);
1698 1698 } else {
1699 1699 length = SA_REGISTERED_LEN(sa, attr);
1700 1700 if (length == 0) {
1701 1701 length = hdr->sa_lengths[length_idx++];
1702 1702 }
1703 1703
1704 1704 SA_ADD_BULK_ATTR(attr_desc, j, attr,
1705 1705 NULL, (void *)
1706 1706 (TOC_OFF(idx_tab->sa_idx_tab[attr]) +
1707 1707 (uintptr_t)old_data[k]), length);
1708 1708 }
1709 1709 }
1710 1710 if (k == 0 && hdl->sa_spill) {
1711 1711 hdr = SA_GET_HDR(hdl, SA_SPILL);
1712 1712 idx_tab = SA_IDX_TAB_GET(hdl, SA_SPILL);
1713 1713 count = spill_attr_count;
1714 1714 } else {
1715 1715 break;
1716 1716 }
1717 1717 }
1718 1718 if (action == SA_ADD) {
1719 1719 length = SA_REGISTERED_LEN(sa, newattr);
1720 1720 if (length == 0) {
1721 1721 length = buflen;
1722 1722 }
1723 1723 SA_ADD_BULK_ATTR(attr_desc, j, newattr, locator,
1724 1724 datastart, buflen);
1725 1725 }
1726 1726
1727 1727 error = sa_build_layouts(hdl, attr_desc, attr_count, tx);
1728 1728
1729 1729 if (old_data[0])
1730 1730 kmem_free(old_data[0], bonus_data_size);
1731 1731 if (old_data[1])
1732 1732 kmem_free(old_data[1], spill_data_size);
1733 1733 kmem_free(attr_desc, sizeof (sa_bulk_attr_t) * attr_count);
1734 1734
1735 1735 return (error);
1736 1736 }
1737 1737
1738 1738 static int
1739 1739 sa_bulk_update_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
1740 1740 dmu_tx_t *tx)
1741 1741 {
1742 1742 int error;
1743 1743 sa_os_t *sa = hdl->sa_os->os_sa;
1744 1744 dmu_object_type_t bonustype;
1745 1745
1746 1746 bonustype = SA_BONUSTYPE_FROM_DB(SA_GET_DB(hdl, SA_BONUS));
1747 1747
1748 1748 ASSERT(hdl);
1749 1749 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1750 1750
1751 1751 /* sync out registration table if necessary */
1752 1752 if (sa->sa_need_attr_registration)
1753 1753 sa_attr_register_sync(hdl, tx);
1754 1754
1755 1755 error = sa_attr_op(hdl, bulk, count, SA_UPDATE, tx);
1756 1756 if (error == 0 && !IS_SA_BONUSTYPE(bonustype) && sa->sa_update_cb)
1757 1757 sa->sa_update_cb(hdl, tx);
1758 1758
1759 1759 return (error);
1760 1760 }
1761 1761
1762 1762 /*
1763 1763 * update or add new attribute
1764 1764 */
1765 1765 int
1766 1766 sa_update(sa_handle_t *hdl, sa_attr_type_t type,
1767 1767 void *buf, uint32_t buflen, dmu_tx_t *tx)
1768 1768 {
1769 1769 int error;
1770 1770 sa_bulk_attr_t bulk;
1771 1771
1772 1772 bulk.sa_attr = type;
1773 1773 bulk.sa_data_func = NULL;
1774 1774 bulk.sa_length = buflen;
1775 1775 bulk.sa_data = buf;
1776 1776
1777 1777 mutex_enter(&hdl->sa_lock);
1778 1778 error = sa_bulk_update_impl(hdl, &bulk, 1, tx);
1779 1779 mutex_exit(&hdl->sa_lock);
1780 1780 return (error);
1781 1781 }
1782 1782
1783 1783 int
1784 1784 sa_update_from_cb(sa_handle_t *hdl, sa_attr_type_t attr,
1785 1785 uint32_t buflen, sa_data_locator_t *locator, void *userdata, dmu_tx_t *tx)
1786 1786 {
1787 1787 int error;
1788 1788 sa_bulk_attr_t bulk;
1789 1789
1790 1790 bulk.sa_attr = attr;
1791 1791 bulk.sa_data = userdata;
1792 1792 bulk.sa_data_func = locator;
1793 1793 bulk.sa_length = buflen;
1794 1794
1795 1795 mutex_enter(&hdl->sa_lock);
1796 1796 error = sa_bulk_update_impl(hdl, &bulk, 1, tx);
1797 1797 mutex_exit(&hdl->sa_lock);
1798 1798 return (error);
1799 1799 }
1800 1800
1801 1801 /*
1802 1802 * Return size of an attribute
1803 1803 */
1804 1804
1805 1805 int
1806 1806 sa_size(sa_handle_t *hdl, sa_attr_type_t attr, int *size)
1807 1807 {
1808 1808 sa_bulk_attr_t bulk;
1809 1809 int error;
1810 1810
1811 1811 bulk.sa_data = NULL;
1812 1812 bulk.sa_attr = attr;
1813 1813 bulk.sa_data_func = NULL;
1814 1814
1815 1815 ASSERT(hdl);
1816 1816 mutex_enter(&hdl->sa_lock);
1817 1817 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) != 0) {
1818 1818 mutex_exit(&hdl->sa_lock);
1819 1819 return (error);
1820 1820 }
1821 1821 *size = bulk.sa_size;
1822 1822
1823 1823 mutex_exit(&hdl->sa_lock);
1824 1824 return (0);
1825 1825 }
1826 1826
1827 1827 int
1828 1828 sa_bulk_lookup_locked(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
1829 1829 {
1830 1830 ASSERT(hdl);
1831 1831 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1832 1832 return (sa_lookup_impl(hdl, attrs, count));
1833 1833 }
1834 1834
1835 1835 int
1836 1836 sa_bulk_lookup(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
1837 1837 {
1838 1838 int error;
1839 1839
1840 1840 ASSERT(hdl);
1841 1841 mutex_enter(&hdl->sa_lock);
1842 1842 error = sa_bulk_lookup_locked(hdl, attrs, count);
1843 1843 mutex_exit(&hdl->sa_lock);
1844 1844 return (error);
1845 1845 }
1846 1846
1847 1847 int
1848 1848 sa_bulk_update(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count, dmu_tx_t *tx)
1849 1849 {
1850 1850 int error;
1851 1851
1852 1852 ASSERT(hdl);
1853 1853 mutex_enter(&hdl->sa_lock);
1854 1854 error = sa_bulk_update_impl(hdl, attrs, count, tx);
1855 1855 mutex_exit(&hdl->sa_lock);
1856 1856 return (error);
1857 1857 }
1858 1858
1859 1859 int
1860 1860 sa_remove(sa_handle_t *hdl, sa_attr_type_t attr, dmu_tx_t *tx)
1861 1861 {
1862 1862 int error;
1863 1863
1864 1864 mutex_enter(&hdl->sa_lock);
1865 1865 error = sa_modify_attrs(hdl, attr, SA_REMOVE, NULL,
1866 1866 NULL, 0, tx);
1867 1867 mutex_exit(&hdl->sa_lock);
1868 1868 return (error);
1869 1869 }
1870 1870
1871 1871 void
1872 1872 sa_object_info(sa_handle_t *hdl, dmu_object_info_t *doi)
1873 1873 {
1874 1874 dmu_object_info_from_db((dmu_buf_t *)hdl->sa_bonus, doi);
1875 1875 }
1876 1876
1877 1877 void
1878 1878 sa_object_size(sa_handle_t *hdl, uint32_t *blksize, u_longlong_t *nblocks)
1879 1879 {
1880 1880 dmu_object_size_from_db((dmu_buf_t *)hdl->sa_bonus,
1881 1881 blksize, nblocks);
1882 1882 }
1883 1883
1884 1884 void
1885 1885 sa_update_user(sa_handle_t *newhdl, sa_handle_t *oldhdl)
1886 1886 {
1887 1887 (void) dmu_buf_update_user((dmu_buf_t *)newhdl->sa_bonus,
1888 1888 oldhdl, newhdl, NULL, sa_evict);
1889 1889 oldhdl->sa_bonus = NULL;
1890 1890 }
1891 1891
1892 1892 void
1893 1893 sa_set_userp(sa_handle_t *hdl, void *ptr)
1894 1894 {
1895 1895 hdl->sa_userp = ptr;
1896 1896 }
1897 1897
1898 1898 dmu_buf_t *
1899 1899 sa_get_db(sa_handle_t *hdl)
1900 1900 {
1901 1901 return ((dmu_buf_t *)hdl->sa_bonus);
1902 1902 }
1903 1903
1904 1904 void *
1905 1905 sa_get_userdata(sa_handle_t *hdl)
1906 1906 {
1907 1907 return (hdl->sa_userp);
1908 1908 }
1909 1909
1910 1910 void
1911 1911 sa_register_update_callback_locked(objset_t *os, sa_update_cb_t *func)
1912 1912 {
1913 1913 ASSERT(MUTEX_HELD(&os->os_sa->sa_lock));
1914 1914 os->os_sa->sa_update_cb = func;
1915 1915 }
1916 1916
1917 1917 void
1918 1918 sa_register_update_callback(objset_t *os, sa_update_cb_t *func)
1919 1919 {
1920 1920
1921 1921 mutex_enter(&os->os_sa->sa_lock);
1922 1922 sa_register_update_callback_locked(os, func);
1923 1923 mutex_exit(&os->os_sa->sa_lock);
1924 1924 }
1925 1925
1926 1926 uint64_t
1927 1927 sa_handle_object(sa_handle_t *hdl)
1928 1928 {
1929 1929 return (hdl->sa_bonus->db_object);
1930 1930 }
1931 1931
1932 1932 boolean_t
1933 1933 sa_enabled(objset_t *os)
1934 1934 {
1935 1935 return (os->os_sa == NULL);
1936 1936 }
1937 1937
1938 1938 int
1939 1939 sa_set_sa_object(objset_t *os, uint64_t sa_object)
1940 1940 {
1941 1941 sa_os_t *sa = os->os_sa;
1942 1942
1943 1943 if (sa->sa_master_obj)
1944 1944 return (1);
1945 1945
1946 1946 sa->sa_master_obj = sa_object;
1947 1947
1948 1948 return (0);
1949 1949 }
1950 1950
1951 1951 int
1952 1952 sa_hdrsize(void *arg)
1953 1953 {
1954 1954 sa_hdr_phys_t *hdr = arg;
1955 1955
1956 1956 return (SA_HDR_SIZE(hdr));
1957 1957 }
1958 1958
1959 1959 void
1960 1960 sa_handle_lock(sa_handle_t *hdl)
1961 1961 {
1962 1962 ASSERT(hdl);
1963 1963 mutex_enter(&hdl->sa_lock);
1964 1964 }
1965 1965
1966 1966 void
1967 1967 sa_handle_unlock(sa_handle_t *hdl)
1968 1968 {
1969 1969 ASSERT(hdl);
1970 1970 mutex_exit(&hdl->sa_lock);
1971 1971 }
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