1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * This file and its contents are supplied under the terms of the
4 * Common Development and Distribution License ("CDDL"), version 1.0.
5 * You may only use this file in accordance with the terms of version
6 * 1.0 of the CDDL.
7 *
8 * A full copy of the text of the CDDL should have accompanied this
9 * source. A copy of the CDDL is also available via the Internet at
10 * https://opensource.org/license/CDDL-1.0.
11 */
12
13 /*
14 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
15 * Copyright (c) 2013, 2017 by Delphix. All rights reserved.
16 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
17 * Copyright 2023 RackTop Systems, Inc.
18 */
19
20 #include <sys/zfs_context.h>
21 #include <sys/types.h>
22 #include <sys/param.h>
23 #include <sys/sysmacros.h>
24 #include <sys/dmu.h>
25 #include <sys/dmu_impl.h>
26 #include <sys/dmu_objset.h>
27 #include <sys/dmu_tx.h>
28 #include <sys/dbuf.h>
29 #include <sys/dnode.h>
30 #include <sys/zap.h>
31 #include <sys/sa.h>
32 #include <sys/sunddi.h>
33 #include <sys/sa_impl.h>
34 #include <sys/errno.h>
35 #include <sys/zfs_context.h>
36
37 #ifdef _KERNEL
38 #include <sys/zfs_znode.h>
39 #endif
40
41 /*
42 * ZFS System attributes:
43 *
44 * A generic mechanism to allow for arbitrary attributes
45 * to be stored in a dnode. The data will be stored in the bonus buffer of
46 * the dnode and if necessary a special "spill" block will be used to handle
47 * overflow situations. The spill block will be sized to fit the data
48 * from 512 - 128K. When a spill block is used the BP (blkptr_t) for the
49 * spill block is stored at the end of the current bonus buffer. Any
50 * attributes that would be in the way of the blkptr_t will be relocated
51 * into the spill block.
52 *
53 * Attribute registration:
54 *
55 * Stored persistently on a per dataset basis
56 * a mapping between attribute "string" names and their actual attribute
57 * numeric values, length, and byteswap function. The names are only used
58 * during registration. All attributes are known by their unique attribute
59 * id value. If an attribute can have a variable size then the value
60 * 0 will be used to indicate this.
61 *
62 * Attribute Layout:
63 *
64 * Attribute layouts are a way to compactly store multiple attributes, but
65 * without taking the overhead associated with managing each attribute
66 * individually. Since you will typically have the same set of attributes
67 * stored in the same order a single table will be used to represent that
68 * layout. The ZPL for example will usually have only about 10 different
69 * layouts (regular files, device files, symlinks,
70 * regular files + scanstamp, files/dir with extended attributes, and then
71 * you have the possibility of all of those minus ACL, because it would
72 * be kicked out into the spill block)
73 *
74 * Layouts are simply an array of the attributes and their
75 * ordering i.e. [0, 1, 4, 5, 2]
76 *
77 * Each distinct layout is given a unique layout number and that is what's
78 * stored in the header at the beginning of the SA data buffer.
79 *
80 * A layout only covers a single dbuf (bonus or spill). If a set of
81 * attributes is split up between the bonus buffer and a spill buffer then
82 * two different layouts will be used. This allows us to byteswap the
83 * spill without looking at the bonus buffer and keeps the on disk format of
84 * the bonus and spill buffer the same.
85 *
86 * Adding a single attribute will cause the entire set of attributes to
87 * be rewritten and could result in a new layout number being constructed
88 * as part of the rewrite if no such layout exists for the new set of
89 * attributes. The new attribute will be appended to the end of the already
90 * existing attributes.
91 *
92 * Both the attribute registration and attribute layout information are
93 * stored in normal ZAP attributes. Their should be a small number of
94 * known layouts and the set of attributes is assumed to typically be quite
95 * small.
96 *
97 * The registered attributes and layout "table" information is maintained
98 * in core and a special "sa_os_t" is attached to the objset_t.
99 *
100 * A special interface is provided to allow for quickly applying
101 * a large set of attributes at once. sa_replace_all_by_template() is
102 * used to set an array of attributes. This is used by the ZPL when
103 * creating a brand new file. The template that is passed into the function
104 * specifies the attribute, size for variable length attributes, location of
105 * data and special "data locator" function if the data isn't in a contiguous
106 * location.
107 *
108 * Byteswap implications:
109 *
110 * Since the SA attributes are not entirely self describing we can't do
111 * the normal byteswap processing. The special ZAP layout attribute and
112 * attribute registration attributes define the byteswap function and the
113 * size of the attributes, unless it is variable sized.
114 * The normal ZFS byteswapping infrastructure assumes you don't need
115 * to read any objects in order to do the necessary byteswapping. Whereas
116 * SA attributes can only be properly byteswapped if the dataset is opened
117 * and the layout/attribute ZAP attributes are available. Because of this
118 * the SA attributes will be byteswapped when they are first accessed by
119 * the SA code that will read the SA data.
120 */
121
122 typedef void (sa_iterfunc_t)(void *hdr, void *addr, sa_attr_type_t,
123 uint16_t length, int length_idx, boolean_t, void *userp);
124
125 static int sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype);
126 static void sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab);
127 static sa_idx_tab_t *sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype,
128 sa_hdr_phys_t *hdr);
129 static void sa_idx_tab_rele(objset_t *os, void *arg);
130 static void sa_copy_data(sa_data_locator_t *func, void *start, void *target,
131 int buflen);
132 static int sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
133 sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
134 uint16_t buflen, dmu_tx_t *tx);
135
136 static arc_byteswap_func_t sa_bswap_table[] = {
137 byteswap_uint64_array,
138 byteswap_uint32_array,
139 byteswap_uint16_array,
140 byteswap_uint8_array,
141 zfs_acl_byteswap,
142 };
143
144 #ifdef HAVE_EFFICIENT_UNALIGNED_ACCESS
145 #define SA_COPY_DATA(f, s, t, l) \
146 do { \
147 if (f == NULL) { \
148 if (l == 8) { \
149 *(uint64_t *)t = *(uint64_t *)s; \
150 } else if (l == 16) { \
151 *(uint64_t *)t = *(uint64_t *)s; \
152 *(uint64_t *)((uintptr_t)t + 8) = \
153 *(uint64_t *)((uintptr_t)s + 8); \
154 } else { \
155 memcpy(t, s, l); \
156 } \
157 } else { \
158 sa_copy_data(f, s, t, l); \
159 } \
160 } while (0)
161 #else
162 #define SA_COPY_DATA(f, s, t, l) sa_copy_data(f, s, t, l)
163 #endif
164
165 /*
166 * This table is fixed and cannot be changed. Its purpose is to
167 * allow the SA code to work with both old/new ZPL file systems.
168 * It contains the list of legacy attributes. These attributes aren't
169 * stored in the "attribute" registry zap objects, since older ZPL file systems
170 * won't have the registry. Only objsets of type ZFS_TYPE_FILESYSTEM will
171 * use this static table.
172 */
173 static const sa_attr_reg_t sa_legacy_attrs[] = {
174 {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0},
175 {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1},
176 {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2},
177 {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3},
178 {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4},
179 {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5},
180 {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6},
181 {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7},
182 {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8},
183 {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9},
184 {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10},
185 {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11},
186 {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12},
187 {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13},
188 {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14},
189 {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15},
190 };
191
192 /*
193 * This is only used for objects of type DMU_OT_ZNODE
194 */
195 static const sa_attr_type_t sa_legacy_zpl_layout[] = {
196 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
197 };
198
199 /*
200 * Special dummy layout used for buffers with no attributes.
201 */
202 static const sa_attr_type_t sa_dummy_zpl_layout[] = { 0 };
203
204 static const size_t sa_legacy_attr_count = ARRAY_SIZE(sa_legacy_attrs);
205 static kmem_cache_t *sa_cache = NULL;
206
207 static int
sa_cache_constructor(void * buf,void * unused,int kmflag)208 sa_cache_constructor(void *buf, void *unused, int kmflag)
209 {
210 (void) unused, (void) kmflag;
211 sa_handle_t *hdl = buf;
212
213 mutex_init(&hdl->sa_lock, NULL, MUTEX_DEFAULT, NULL);
214 return (0);
215 }
216
217 static void
sa_cache_destructor(void * buf,void * unused)218 sa_cache_destructor(void *buf, void *unused)
219 {
220 (void) unused;
221 sa_handle_t *hdl = buf;
222 mutex_destroy(&hdl->sa_lock);
223 }
224
225 void
sa_cache_init(void)226 sa_cache_init(void)
227 {
228 sa_cache = kmem_cache_create("sa_cache",
229 sizeof (sa_handle_t), 0, sa_cache_constructor,
230 sa_cache_destructor, NULL, NULL, NULL, KMC_RECLAIMABLE);
231 }
232
233 void
sa_cache_fini(void)234 sa_cache_fini(void)
235 {
236 if (sa_cache)
237 kmem_cache_destroy(sa_cache);
238 }
239
240 static int
layout_num_compare(const void * arg1,const void * arg2)241 layout_num_compare(const void *arg1, const void *arg2)
242 {
243 const sa_lot_t *node1 = (const sa_lot_t *)arg1;
244 const sa_lot_t *node2 = (const sa_lot_t *)arg2;
245
246 return (TREE_CMP(node1->lot_num, node2->lot_num));
247 }
248
249 static int
layout_hash_compare(const void * arg1,const void * arg2)250 layout_hash_compare(const void *arg1, const void *arg2)
251 {
252 const sa_lot_t *node1 = (const sa_lot_t *)arg1;
253 const sa_lot_t *node2 = (const sa_lot_t *)arg2;
254
255 int cmp = TREE_CMP(node1->lot_hash, node2->lot_hash);
256 if (likely(cmp))
257 return (cmp);
258
259 return (TREE_CMP(node1->lot_instance, node2->lot_instance));
260 }
261
262 static boolean_t
sa_layout_equal(sa_lot_t * tbf,sa_attr_type_t * attrs,int count)263 sa_layout_equal(sa_lot_t *tbf, sa_attr_type_t *attrs, int count)
264 {
265 int i;
266
267 if (count != tbf->lot_attr_count)
268 return (1);
269
270 for (i = 0; i != count; i++) {
271 if (attrs[i] != tbf->lot_attrs[i])
272 return (1);
273 }
274 return (0);
275 }
276
277 #define SA_ATTR_HASH(attr) (zfs_crc64_table[(-1ULL ^ attr) & 0xFF])
278
279 static uint64_t
sa_layout_info_hash(const sa_attr_type_t * attrs,int attr_count)280 sa_layout_info_hash(const sa_attr_type_t *attrs, int attr_count)
281 {
282 uint64_t crc = -1ULL;
283
284 for (int i = 0; i != attr_count; i++)
285 crc ^= SA_ATTR_HASH(attrs[i]);
286
287 return (crc);
288 }
289
290 static int
sa_get_spill(sa_handle_t * hdl)291 sa_get_spill(sa_handle_t *hdl)
292 {
293 int rc;
294 if (hdl->sa_spill == NULL) {
295 if ((rc = dmu_spill_hold_existing(hdl->sa_bonus, NULL,
296 &hdl->sa_spill)) == 0)
297 VERIFY0(sa_build_index(hdl, SA_SPILL));
298 } else {
299 rc = 0;
300 }
301
302 return (rc);
303 }
304
305 /*
306 * Main attribute lookup/update function
307 * returns 0 for success or non zero for failures
308 *
309 * Operates on bulk array, first failure will abort further processing
310 */
311 static int
sa_attr_op(sa_handle_t * hdl,sa_bulk_attr_t * bulk,int count,sa_data_op_t data_op,dmu_tx_t * tx)312 sa_attr_op(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
313 sa_data_op_t data_op, dmu_tx_t *tx)
314 {
315 sa_os_t *sa = hdl->sa_os->os_sa;
316 int i;
317 int error = 0;
318 sa_buf_type_t buftypes;
319
320 buftypes = 0;
321
322 ASSERT(count > 0);
323 for (i = 0; i != count; i++) {
324 ASSERT(bulk[i].sa_attr <= hdl->sa_os->os_sa->sa_num_attrs);
325
326 bulk[i].sa_addr = NULL;
327 /* First check the bonus buffer */
328
329 if (hdl->sa_bonus_tab && TOC_ATTR_PRESENT(
330 hdl->sa_bonus_tab->sa_idx_tab[bulk[i].sa_attr])) {
331 SA_ATTR_INFO(sa, hdl->sa_bonus_tab,
332 SA_GET_HDR(hdl, SA_BONUS),
333 bulk[i].sa_attr, bulk[i], SA_BONUS, hdl);
334 if (tx && !(buftypes & SA_BONUS)) {
335 dmu_buf_will_dirty(hdl->sa_bonus, tx);
336 buftypes |= SA_BONUS;
337 }
338 }
339 if (bulk[i].sa_addr == NULL &&
340 ((error = sa_get_spill(hdl)) == 0)) {
341 if (TOC_ATTR_PRESENT(
342 hdl->sa_spill_tab->sa_idx_tab[bulk[i].sa_attr])) {
343 SA_ATTR_INFO(sa, hdl->sa_spill_tab,
344 SA_GET_HDR(hdl, SA_SPILL),
345 bulk[i].sa_attr, bulk[i], SA_SPILL, hdl);
346 if (tx && !(buftypes & SA_SPILL) &&
347 bulk[i].sa_size == bulk[i].sa_length) {
348 dmu_buf_will_dirty(hdl->sa_spill, tx);
349 buftypes |= SA_SPILL;
350 }
351 }
352 }
353 if (error && error != ENOENT) {
354 return ((error == ECKSUM) ? EIO : error);
355 }
356
357 switch (data_op) {
358 case SA_LOOKUP:
359 if (bulk[i].sa_addr == NULL)
360 return (SET_ERROR(ENOENT));
361 if (bulk[i].sa_data) {
362 SA_COPY_DATA(bulk[i].sa_data_func,
363 bulk[i].sa_addr, bulk[i].sa_data,
364 MIN(bulk[i].sa_size, bulk[i].sa_length));
365 }
366 continue;
367
368 case SA_UPDATE:
369 /* existing rewrite of attr */
370 if (bulk[i].sa_addr &&
371 bulk[i].sa_size == bulk[i].sa_length) {
372 SA_COPY_DATA(bulk[i].sa_data_func,
373 bulk[i].sa_data, bulk[i].sa_addr,
374 bulk[i].sa_length);
375 continue;
376 } else if (bulk[i].sa_addr) { /* attr size change */
377 error = sa_modify_attrs(hdl, bulk[i].sa_attr,
378 SA_REPLACE, bulk[i].sa_data_func,
379 bulk[i].sa_data, bulk[i].sa_length, tx);
380 } else { /* adding new attribute */
381 error = sa_modify_attrs(hdl, bulk[i].sa_attr,
382 SA_ADD, bulk[i].sa_data_func,
383 bulk[i].sa_data, bulk[i].sa_length, tx);
384 }
385 if (error)
386 return (error);
387 break;
388 default:
389 break;
390 }
391 }
392 return (error);
393 }
394
395 static sa_lot_t *
sa_add_layout_entry(objset_t * os,const sa_attr_type_t * attrs,int attr_count,uint64_t lot_num,uint64_t hash,boolean_t zapadd,dmu_tx_t * tx)396 sa_add_layout_entry(objset_t *os, const sa_attr_type_t *attrs, int attr_count,
397 uint64_t lot_num, uint64_t hash, boolean_t zapadd, dmu_tx_t *tx)
398 {
399 sa_os_t *sa = os->os_sa;
400 sa_lot_t *tb, *findtb;
401 int i;
402 avl_index_t loc;
403
404 ASSERT(MUTEX_HELD(&sa->sa_lock));
405 tb = kmem_zalloc(sizeof (sa_lot_t), KM_SLEEP);
406 tb->lot_attr_count = attr_count;
407 tb->lot_attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
408 KM_SLEEP);
409 memcpy(tb->lot_attrs, attrs, sizeof (sa_attr_type_t) * attr_count);
410 tb->lot_num = lot_num;
411 tb->lot_hash = hash;
412 tb->lot_instance = 0;
413
414 if (zapadd) {
415 char attr_name[8];
416
417 if (sa->sa_layout_attr_obj == 0) {
418 sa->sa_layout_attr_obj = zap_create_link(os,
419 DMU_OT_SA_ATTR_LAYOUTS,
420 sa->sa_master_obj, SA_LAYOUTS, tx);
421 }
422
423 (void) snprintf(attr_name, sizeof (attr_name),
424 "%d", (int)lot_num);
425 VERIFY0(zap_update(os, os->os_sa->sa_layout_attr_obj,
426 attr_name, 2, attr_count, attrs, tx));
427 }
428
429 list_create(&tb->lot_idx_tab, sizeof (sa_idx_tab_t),
430 offsetof(sa_idx_tab_t, sa_next));
431
432 for (i = 0; i != attr_count; i++) {
433 if (sa->sa_attr_table[tb->lot_attrs[i]].sa_length == 0)
434 tb->lot_var_sizes++;
435 }
436
437 avl_add(&sa->sa_layout_num_tree, tb);
438
439 /* verify we don't have a hash collision */
440 if ((findtb = avl_find(&sa->sa_layout_hash_tree, tb, &loc)) != NULL) {
441 for (; findtb && findtb->lot_hash == hash;
442 findtb = AVL_NEXT(&sa->sa_layout_hash_tree, findtb)) {
443 if (findtb->lot_instance != tb->lot_instance)
444 break;
445 tb->lot_instance++;
446 }
447 }
448 avl_add(&sa->sa_layout_hash_tree, tb);
449 return (tb);
450 }
451
452 static void
sa_find_layout(objset_t * os,uint64_t hash,sa_attr_type_t * attrs,int count,dmu_tx_t * tx,sa_lot_t ** lot)453 sa_find_layout(objset_t *os, uint64_t hash, sa_attr_type_t *attrs,
454 int count, dmu_tx_t *tx, sa_lot_t **lot)
455 {
456 sa_lot_t *tb, tbsearch;
457 avl_index_t loc;
458 sa_os_t *sa = os->os_sa;
459 boolean_t found = B_FALSE;
460
461 mutex_enter(&sa->sa_lock);
462 tbsearch.lot_hash = hash;
463 tbsearch.lot_instance = 0;
464 tb = avl_find(&sa->sa_layout_hash_tree, &tbsearch, &loc);
465 if (tb) {
466 for (; tb && tb->lot_hash == hash;
467 tb = AVL_NEXT(&sa->sa_layout_hash_tree, tb)) {
468 if (sa_layout_equal(tb, attrs, count) == 0) {
469 found = B_TRUE;
470 break;
471 }
472 }
473 }
474 if (!found) {
475 tb = sa_add_layout_entry(os, attrs, count,
476 avl_numnodes(&sa->sa_layout_num_tree), hash, B_TRUE, tx);
477 }
478 mutex_exit(&sa->sa_lock);
479 *lot = tb;
480 }
481
482 static int
sa_resize_spill(sa_handle_t * hdl,uint32_t size,dmu_tx_t * tx)483 sa_resize_spill(sa_handle_t *hdl, uint32_t size, dmu_tx_t *tx)
484 {
485 int error;
486 uint32_t blocksize;
487
488 if (size == 0) {
489 blocksize = SPA_MINBLOCKSIZE;
490 } else if (size > SPA_OLD_MAXBLOCKSIZE) {
491 ASSERT(0);
492 return (SET_ERROR(EFBIG));
493 } else {
494 blocksize = P2ROUNDUP_TYPED(size, SPA_MINBLOCKSIZE, uint32_t);
495 }
496
497 error = dbuf_spill_set_blksz(hdl->sa_spill, blocksize, tx);
498 ASSERT0(error);
499 return (error);
500 }
501
502 static void
sa_copy_data(sa_data_locator_t * func,void * datastart,void * target,int buflen)503 sa_copy_data(sa_data_locator_t *func, void *datastart, void *target, int buflen)
504 {
505 if (func == NULL) {
506 memcpy(target, datastart, buflen);
507 } else {
508 boolean_t start;
509 int bytes;
510 void *dataptr;
511 void *saptr = target;
512 uint32_t length;
513
514 start = B_TRUE;
515 bytes = 0;
516 while (bytes < buflen) {
517 func(&dataptr, &length, buflen, start, datastart);
518 memcpy(saptr, dataptr, length);
519 saptr = (void *)((caddr_t)saptr + length);
520 bytes += length;
521 start = B_FALSE;
522 }
523 }
524 }
525
526 /*
527 * Determine several different values pertaining to system attribute
528 * buffers.
529 *
530 * Return the size of the sa_hdr_phys_t header for the buffer. Each
531 * variable length attribute except the first contributes two bytes to
532 * the header size, which is then rounded up to an 8-byte boundary.
533 *
534 * The following output parameters are also computed.
535 *
536 * index - The index of the first attribute in attr_desc that will
537 * spill over. Only valid if will_spill is set.
538 *
539 * total - The total number of bytes of all system attributes described
540 * in attr_desc.
541 *
542 * will_spill - Set when spilling is necessary. It is only set when
543 * the buftype is SA_BONUS.
544 */
545 static int
sa_find_sizes(sa_os_t * sa,sa_bulk_attr_t * attr_desc,int attr_count,dmu_buf_t * db,sa_buf_type_t buftype,int full_space,int * index,int * total,boolean_t * will_spill)546 sa_find_sizes(sa_os_t *sa, sa_bulk_attr_t *attr_desc, int attr_count,
547 dmu_buf_t *db, sa_buf_type_t buftype, int full_space, int *index,
548 int *total, boolean_t *will_spill)
549 {
550 int var_size_count = 0;
551 int i;
552 int hdrsize;
553 int extra_hdrsize;
554
555 if (buftype == SA_BONUS && sa->sa_force_spill) {
556 *total = 0;
557 *index = 0;
558 *will_spill = B_TRUE;
559 return (0);
560 }
561
562 *index = -1;
563 *total = 0;
564 *will_spill = B_FALSE;
565
566 extra_hdrsize = 0;
567 hdrsize = (SA_BONUSTYPE_FROM_DB(db) == DMU_OT_ZNODE) ? 0 :
568 sizeof (sa_hdr_phys_t);
569
570 ASSERT(IS_P2ALIGNED(full_space, 8));
571
572 for (i = 0; i != attr_count; i++) {
573 boolean_t is_var_sz, might_spill_here;
574 int tmp_hdrsize;
575
576 *total = P2ROUNDUP(*total, 8);
577 *total += attr_desc[i].sa_length;
578 if (*will_spill)
579 continue;
580
581 is_var_sz = (SA_REGISTERED_LEN(sa, attr_desc[i].sa_attr) == 0);
582 if (is_var_sz)
583 var_size_count++;
584
585 /*
586 * Calculate what the SA header size would be if this
587 * attribute doesn't spill.
588 */
589 tmp_hdrsize = hdrsize + ((is_var_sz && var_size_count > 1) ?
590 sizeof (uint16_t) : 0);
591
592 /*
593 * Check whether this attribute spans into the space
594 * that would be used by the spill block pointer should
595 * a spill block be needed.
596 */
597 might_spill_here =
598 buftype == SA_BONUS && *index == -1 &&
599 (*total + P2ROUNDUP(tmp_hdrsize, 8)) >
600 (full_space - sizeof (blkptr_t));
601
602 if (is_var_sz && var_size_count > 1) {
603 if (buftype == SA_SPILL ||
604 tmp_hdrsize + *total < full_space) {
605 /*
606 * Record the extra header size in case this
607 * increase needs to be reversed due to
608 * spill-over.
609 */
610 hdrsize = tmp_hdrsize;
611 if (*index != -1 || might_spill_here)
612 extra_hdrsize += sizeof (uint16_t);
613 } else {
614 ASSERT(buftype == SA_BONUS);
615 if (*index == -1)
616 *index = i;
617 *will_spill = B_TRUE;
618 continue;
619 }
620 }
621
622 /*
623 * Store index of where spill *could* occur. Then
624 * continue to count the remaining attribute sizes. The
625 * sum is used later for sizing bonus and spill buffer.
626 */
627 if (might_spill_here)
628 *index = i;
629
630 if ((*total + P2ROUNDUP(hdrsize, 8)) > full_space &&
631 buftype == SA_BONUS)
632 *will_spill = B_TRUE;
633 }
634
635 if (*will_spill)
636 hdrsize -= extra_hdrsize;
637
638 hdrsize = P2ROUNDUP(hdrsize, 8);
639 return (hdrsize);
640 }
641
642 #define BUF_SPACE_NEEDED(total, header) (total + header)
643
644 /*
645 * Find layout that corresponds to ordering of attributes
646 * If not found a new layout number is created and added to
647 * persistent layout tables.
648 */
649 static int
sa_build_layouts(sa_handle_t * hdl,sa_bulk_attr_t * attr_desc,int attr_count,dmu_tx_t * tx)650 sa_build_layouts(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, int attr_count,
651 dmu_tx_t *tx)
652 {
653 sa_os_t *sa = hdl->sa_os->os_sa;
654 uint64_t hash;
655 sa_buf_type_t buftype;
656 sa_hdr_phys_t *sahdr;
657 void *data_start;
658 sa_attr_type_t *attrs, *attrs_start;
659 int i, lot_count;
660 int dnodesize;
661 int spill_idx;
662 int hdrsize;
663 int spillhdrsize = 0;
664 int used;
665 dmu_object_type_t bonustype;
666 sa_lot_t *lot;
667 int len_idx;
668 int spill_used;
669 int bonuslen;
670 boolean_t spilling;
671
672 dmu_buf_will_dirty(hdl->sa_bonus, tx);
673 bonustype = SA_BONUSTYPE_FROM_DB(hdl->sa_bonus);
674 dmu_object_dnsize_from_db(hdl->sa_bonus, &dnodesize);
675 bonuslen = DN_BONUS_SIZE(dnodesize);
676
677 /* first determine bonus header size and sum of all attributes */
678 hdrsize = sa_find_sizes(sa, attr_desc, attr_count, hdl->sa_bonus,
679 SA_BONUS, bonuslen, &spill_idx, &used, &spilling);
680
681 if (used > SPA_OLD_MAXBLOCKSIZE)
682 return (SET_ERROR(EFBIG));
683
684 VERIFY0(dmu_set_bonus(hdl->sa_bonus, spilling ?
685 MIN(bonuslen - sizeof (blkptr_t), used + hdrsize) :
686 used + hdrsize, tx));
687
688 ASSERT((bonustype == DMU_OT_ZNODE && spilling == 0) ||
689 bonustype == DMU_OT_SA);
690
691 /* setup and size spill buffer when needed */
692 if (spilling) {
693 boolean_t dummy;
694
695 if (hdl->sa_spill == NULL) {
696 VERIFY0(dmu_spill_hold_by_bonus(hdl->sa_bonus,
697 DB_RF_MUST_SUCCEED, NULL, &hdl->sa_spill));
698 }
699 dmu_buf_will_dirty(hdl->sa_spill, tx);
700
701 spillhdrsize = sa_find_sizes(sa, &attr_desc[spill_idx],
702 attr_count - spill_idx, hdl->sa_spill, SA_SPILL,
703 hdl->sa_spill->db_size, &i, &spill_used, &dummy);
704
705 if (spill_used > SPA_OLD_MAXBLOCKSIZE)
706 return (SET_ERROR(EFBIG));
707
708 if (BUF_SPACE_NEEDED(spill_used, spillhdrsize) >
709 hdl->sa_spill->db_size)
710 VERIFY0(sa_resize_spill(hdl,
711 BUF_SPACE_NEEDED(spill_used, spillhdrsize), tx));
712 }
713
714 /* setup starting pointers to lay down data */
715 data_start = (void *)((uintptr_t)hdl->sa_bonus->db_data + hdrsize);
716 sahdr = (sa_hdr_phys_t *)hdl->sa_bonus->db_data;
717 buftype = SA_BONUS;
718
719 attrs_start = attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
720 KM_SLEEP);
721 lot_count = 0;
722
723 for (i = 0, len_idx = 0, hash = -1ULL; i != attr_count; i++) {
724 uint16_t length;
725
726 ASSERT(IS_P2ALIGNED(data_start, 8));
727 attrs[i] = attr_desc[i].sa_attr;
728 length = SA_REGISTERED_LEN(sa, attrs[i]);
729 if (length == 0)
730 length = attr_desc[i].sa_length;
731
732 if (spilling && i == spill_idx) { /* switch to spill buffer */
733 VERIFY(bonustype == DMU_OT_SA);
734 if (buftype == SA_BONUS && !sa->sa_force_spill) {
735 sa_find_layout(hdl->sa_os, hash, attrs_start,
736 lot_count, tx, &lot);
737 SA_SET_HDR(sahdr, lot->lot_num, hdrsize);
738 }
739
740 buftype = SA_SPILL;
741 hash = -1ULL;
742 len_idx = 0;
743
744 sahdr = (sa_hdr_phys_t *)hdl->sa_spill->db_data;
745 sahdr->sa_magic = SA_MAGIC;
746 data_start = (void *)((uintptr_t)sahdr +
747 spillhdrsize);
748 attrs_start = &attrs[i];
749 lot_count = 0;
750 }
751 hash ^= SA_ATTR_HASH(attrs[i]);
752 attr_desc[i].sa_addr = data_start;
753 attr_desc[i].sa_size = length;
754 SA_COPY_DATA(attr_desc[i].sa_data_func, attr_desc[i].sa_data,
755 data_start, length);
756 if (sa->sa_attr_table[attrs[i]].sa_length == 0) {
757 sahdr->sa_lengths[len_idx++] = length;
758 }
759 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
760 length), 8);
761 lot_count++;
762 }
763
764 sa_find_layout(hdl->sa_os, hash, attrs_start, lot_count, tx, &lot);
765
766 /*
767 * Verify that old znodes always have layout number 0.
768 * Must be DMU_OT_SA for arbitrary layouts
769 */
770 VERIFY((bonustype == DMU_OT_ZNODE && lot->lot_num == 0) ||
771 (bonustype == DMU_OT_SA && lot->lot_num > 1));
772
773 if (bonustype == DMU_OT_SA) {
774 SA_SET_HDR(sahdr, lot->lot_num,
775 buftype == SA_BONUS ? hdrsize : spillhdrsize);
776 }
777
778 kmem_free(attrs, sizeof (sa_attr_type_t) * attr_count);
779 if (hdl->sa_bonus_tab) {
780 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
781 hdl->sa_bonus_tab = NULL;
782 }
783 if (!sa->sa_force_spill)
784 VERIFY0(sa_build_index(hdl, SA_BONUS));
785 if (hdl->sa_spill) {
786 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
787 if (!spilling) {
788 /*
789 * remove spill block that is no longer needed.
790 */
791 dmu_buf_rele(hdl->sa_spill, NULL);
792 hdl->sa_spill = NULL;
793 hdl->sa_spill_tab = NULL;
794 VERIFY0(dmu_rm_spill(hdl->sa_os,
795 sa_handle_object(hdl), tx));
796 } else {
797 VERIFY0(sa_build_index(hdl, SA_SPILL));
798 }
799 }
800
801 return (0);
802 }
803
804 static void
sa_free_attr_table(sa_os_t * sa)805 sa_free_attr_table(sa_os_t *sa)
806 {
807 int i;
808
809 if (sa->sa_attr_table == NULL)
810 return;
811
812 for (i = 0; i != sa->sa_num_attrs; i++) {
813 if (sa->sa_attr_table[i].sa_name)
814 kmem_free(sa->sa_attr_table[i].sa_name,
815 strlen(sa->sa_attr_table[i].sa_name) + 1);
816 }
817
818 kmem_free(sa->sa_attr_table,
819 sizeof (sa_attr_table_t) * sa->sa_num_attrs);
820
821 sa->sa_attr_table = NULL;
822 }
823
824 static int
sa_attr_table_setup(objset_t * os,const sa_attr_reg_t * reg_attrs,int count)825 sa_attr_table_setup(objset_t *os, const sa_attr_reg_t *reg_attrs, int count)
826 {
827 sa_os_t *sa = os->os_sa;
828 uint64_t sa_attr_count = 0;
829 uint64_t sa_reg_count = 0;
830 int error = 0;
831 uint64_t attr_value;
832 sa_attr_table_t *tb;
833 zap_cursor_t zc;
834 zap_attribute_t *za;
835 int registered_count = 0;
836 int i;
837 dmu_objset_type_t ostype = dmu_objset_type(os);
838
839 sa->sa_user_table =
840 kmem_zalloc(count * sizeof (sa_attr_type_t), KM_SLEEP);
841 sa->sa_user_table_sz = count * sizeof (sa_attr_type_t);
842
843 if (sa->sa_reg_attr_obj != 0) {
844 error = zap_count(os, sa->sa_reg_attr_obj,
845 &sa_attr_count);
846
847 /*
848 * Make sure we retrieved a count and that it isn't zero
849 */
850 if (error || (error == 0 && sa_attr_count == 0)) {
851 if (error == 0)
852 error = SET_ERROR(EINVAL);
853 goto bail;
854 }
855 sa_reg_count = sa_attr_count;
856 }
857
858 if (ostype == DMU_OST_ZFS && sa_attr_count == 0)
859 sa_attr_count += sa_legacy_attr_count;
860
861 /* Allocate attribute numbers for attributes that aren't registered */
862 for (i = 0; i != count; i++) {
863 boolean_t found = B_FALSE;
864 int j;
865
866 if (ostype == DMU_OST_ZFS) {
867 for (j = 0; j != sa_legacy_attr_count; j++) {
868 if (strcmp(reg_attrs[i].sa_name,
869 sa_legacy_attrs[j].sa_name) == 0) {
870 sa->sa_user_table[i] =
871 sa_legacy_attrs[j].sa_attr;
872 found = B_TRUE;
873 }
874 }
875 }
876 if (found)
877 continue;
878
879 if (sa->sa_reg_attr_obj)
880 error = zap_lookup(os, sa->sa_reg_attr_obj,
881 reg_attrs[i].sa_name, 8, 1, &attr_value);
882 else
883 error = SET_ERROR(ENOENT);
884 switch (error) {
885 case ENOENT:
886 sa->sa_user_table[i] = (sa_attr_type_t)sa_attr_count;
887 sa_attr_count++;
888 break;
889 case 0:
890 sa->sa_user_table[i] = ATTR_NUM(attr_value);
891 break;
892 default:
893 goto bail;
894 }
895 }
896
897 sa->sa_num_attrs = sa_attr_count;
898 tb = sa->sa_attr_table =
899 kmem_zalloc(sizeof (sa_attr_table_t) * sa_attr_count, KM_SLEEP);
900
901 /*
902 * Attribute table is constructed from requested attribute list,
903 * previously foreign registered attributes, and also the legacy
904 * ZPL set of attributes.
905 */
906
907 if (sa->sa_reg_attr_obj) {
908 za = zap_attribute_alloc();
909 for (zap_cursor_init(&zc, os, sa->sa_reg_attr_obj);
910 (error = zap_cursor_retrieve(&zc, za)) == 0;
911 zap_cursor_advance(&zc)) {
912 uint64_t value;
913 value = za->za_first_integer;
914
915 registered_count++;
916 tb[ATTR_NUM(value)].sa_attr = ATTR_NUM(value);
917 tb[ATTR_NUM(value)].sa_length = ATTR_LENGTH(value);
918 tb[ATTR_NUM(value)].sa_byteswap = ATTR_BSWAP(value);
919 tb[ATTR_NUM(value)].sa_registered = B_TRUE;
920
921 if (tb[ATTR_NUM(value)].sa_name) {
922 continue;
923 }
924 tb[ATTR_NUM(value)].sa_name =
925 kmem_zalloc(strlen(za->za_name) +1, KM_SLEEP);
926 (void) strlcpy(tb[ATTR_NUM(value)].sa_name, za->za_name,
927 strlen(za->za_name) +1);
928 }
929 zap_cursor_fini(&zc);
930 zap_attribute_free(za);
931 /*
932 * Make sure we processed the correct number of registered
933 * attributes
934 */
935 if (registered_count != sa_reg_count) {
936 ASSERT(error != 0);
937 goto bail;
938 }
939
940 }
941
942 if (ostype == DMU_OST_ZFS) {
943 for (i = 0; i != sa_legacy_attr_count; i++) {
944 if (tb[i].sa_name)
945 continue;
946 tb[i].sa_attr = sa_legacy_attrs[i].sa_attr;
947 tb[i].sa_length = sa_legacy_attrs[i].sa_length;
948 tb[i].sa_byteswap = sa_legacy_attrs[i].sa_byteswap;
949 tb[i].sa_registered = B_FALSE;
950 tb[i].sa_name =
951 kmem_zalloc(strlen(sa_legacy_attrs[i].sa_name) +1,
952 KM_SLEEP);
953 (void) strlcpy(tb[i].sa_name,
954 sa_legacy_attrs[i].sa_name,
955 strlen(sa_legacy_attrs[i].sa_name) + 1);
956 }
957 }
958
959 for (i = 0; i != count; i++) {
960 sa_attr_type_t attr_id;
961
962 attr_id = sa->sa_user_table[i];
963 if (tb[attr_id].sa_name)
964 continue;
965
966 tb[attr_id].sa_length = reg_attrs[i].sa_length;
967 tb[attr_id].sa_byteswap = reg_attrs[i].sa_byteswap;
968 tb[attr_id].sa_attr = attr_id;
969 tb[attr_id].sa_name =
970 kmem_zalloc(strlen(reg_attrs[i].sa_name) + 1, KM_SLEEP);
971 (void) strlcpy(tb[attr_id].sa_name, reg_attrs[i].sa_name,
972 strlen(reg_attrs[i].sa_name) + 1);
973 }
974
975 sa->sa_need_attr_registration =
976 (sa_attr_count != registered_count);
977
978 return (0);
979 bail:
980 kmem_free(sa->sa_user_table, count * sizeof (sa_attr_type_t));
981 sa->sa_user_table = NULL;
982 sa_free_attr_table(sa);
983 ASSERT(error != 0);
984 return (error);
985 }
986
987 int
sa_setup(objset_t * os,uint64_t sa_obj,const sa_attr_reg_t * reg_attrs,int count,sa_attr_type_t ** user_table)988 sa_setup(objset_t *os, uint64_t sa_obj, const sa_attr_reg_t *reg_attrs,
989 int count, sa_attr_type_t **user_table)
990 {
991 zap_cursor_t zc;
992 zap_attribute_t *za;
993 sa_os_t *sa;
994 dmu_objset_type_t ostype = dmu_objset_type(os);
995 sa_attr_type_t *tb;
996 int error;
997
998 mutex_enter(&os->os_user_ptr_lock);
999 if (os->os_sa) {
1000 mutex_enter(&os->os_sa->sa_lock);
1001 mutex_exit(&os->os_user_ptr_lock);
1002 tb = os->os_sa->sa_user_table;
1003 mutex_exit(&os->os_sa->sa_lock);
1004 *user_table = tb;
1005 return (0);
1006 }
1007
1008 sa = kmem_zalloc(sizeof (sa_os_t), KM_SLEEP);
1009 mutex_init(&sa->sa_lock, NULL, MUTEX_NOLOCKDEP, NULL);
1010 sa->sa_master_obj = sa_obj;
1011
1012 os->os_sa = sa;
1013 mutex_enter(&sa->sa_lock);
1014 mutex_exit(&os->os_user_ptr_lock);
1015 avl_create(&sa->sa_layout_num_tree, layout_num_compare,
1016 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_num_node));
1017 avl_create(&sa->sa_layout_hash_tree, layout_hash_compare,
1018 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_hash_node));
1019
1020 if (sa_obj) {
1021 error = zap_lookup(os, sa_obj, SA_LAYOUTS,
1022 8, 1, &sa->sa_layout_attr_obj);
1023 if (error != 0 && error != ENOENT)
1024 goto fail;
1025 error = zap_lookup(os, sa_obj, SA_REGISTRY,
1026 8, 1, &sa->sa_reg_attr_obj);
1027 if (error != 0 && error != ENOENT)
1028 goto fail;
1029 }
1030
1031 if ((error = sa_attr_table_setup(os, reg_attrs, count)) != 0)
1032 goto fail;
1033
1034 if (sa->sa_layout_attr_obj != 0) {
1035 uint64_t layout_count;
1036
1037 error = zap_count(os, sa->sa_layout_attr_obj,
1038 &layout_count);
1039
1040 /*
1041 * Layout number count should be > 0
1042 */
1043 if (error || (error == 0 && layout_count == 0)) {
1044 if (error == 0)
1045 error = SET_ERROR(EINVAL);
1046 goto fail;
1047 }
1048
1049 za = zap_attribute_alloc();
1050 for (zap_cursor_init(&zc, os, sa->sa_layout_attr_obj);
1051 (error = zap_cursor_retrieve(&zc, za)) == 0;
1052 zap_cursor_advance(&zc)) {
1053 sa_attr_type_t *lot_attrs;
1054 uint64_t lot_num;
1055
1056 lot_attrs = kmem_zalloc(sizeof (sa_attr_type_t) *
1057 za->za_num_integers, KM_SLEEP);
1058
1059 if ((error = (zap_lookup(os, sa->sa_layout_attr_obj,
1060 za->za_name, 2, za->za_num_integers,
1061 lot_attrs))) != 0) {
1062 kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
1063 za->za_num_integers);
1064 break;
1065 }
1066 VERIFY0(ddi_strtoull(za->za_name, NULL, 10,
1067 (unsigned long long *)&lot_num));
1068
1069 (void) sa_add_layout_entry(os, lot_attrs,
1070 za->za_num_integers, lot_num,
1071 sa_layout_info_hash(lot_attrs,
1072 za->za_num_integers), B_FALSE, NULL);
1073 kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
1074 za->za_num_integers);
1075 }
1076 zap_cursor_fini(&zc);
1077 zap_attribute_free(za);
1078
1079 /*
1080 * Make sure layout count matches number of entries added
1081 * to AVL tree
1082 */
1083 if (avl_numnodes(&sa->sa_layout_num_tree) != layout_count) {
1084 ASSERT(error != 0);
1085 goto fail;
1086 }
1087 }
1088
1089 /* Add special layout number for old ZNODES */
1090 if (ostype == DMU_OST_ZFS) {
1091 (void) sa_add_layout_entry(os, sa_legacy_zpl_layout,
1092 sa_legacy_attr_count, 0,
1093 sa_layout_info_hash(sa_legacy_zpl_layout,
1094 sa_legacy_attr_count), B_FALSE, NULL);
1095
1096 (void) sa_add_layout_entry(os, sa_dummy_zpl_layout, 0, 1,
1097 0, B_FALSE, NULL);
1098 }
1099 *user_table = os->os_sa->sa_user_table;
1100 mutex_exit(&sa->sa_lock);
1101 return (0);
1102 fail:
1103 os->os_sa = NULL;
1104 sa_free_attr_table(sa);
1105 if (sa->sa_user_table)
1106 kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
1107 mutex_exit(&sa->sa_lock);
1108 avl_destroy(&sa->sa_layout_hash_tree);
1109 avl_destroy(&sa->sa_layout_num_tree);
1110 mutex_destroy(&sa->sa_lock);
1111 kmem_free(sa, sizeof (sa_os_t));
1112 return ((error == ECKSUM) ? EIO : error);
1113 }
1114
1115 void
sa_tear_down(objset_t * os)1116 sa_tear_down(objset_t *os)
1117 {
1118 sa_os_t *sa = os->os_sa;
1119 sa_lot_t *layout;
1120 void *cookie;
1121
1122 kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
1123
1124 /* Free up attr table */
1125
1126 sa_free_attr_table(sa);
1127
1128 cookie = NULL;
1129 while ((layout =
1130 avl_destroy_nodes(&sa->sa_layout_hash_tree, &cookie))) {
1131 sa_idx_tab_t *tab;
1132 while ((tab = list_head(&layout->lot_idx_tab))) {
1133 ASSERT(zfs_refcount_count(&tab->sa_refcount));
1134 sa_idx_tab_rele(os, tab);
1135 }
1136 }
1137
1138 cookie = NULL;
1139 while ((layout = avl_destroy_nodes(&sa->sa_layout_num_tree, &cookie))) {
1140 kmem_free(layout->lot_attrs,
1141 sizeof (sa_attr_type_t) * layout->lot_attr_count);
1142 kmem_free(layout, sizeof (sa_lot_t));
1143 }
1144
1145 avl_destroy(&sa->sa_layout_hash_tree);
1146 avl_destroy(&sa->sa_layout_num_tree);
1147 mutex_destroy(&sa->sa_lock);
1148
1149 kmem_free(sa, sizeof (sa_os_t));
1150 os->os_sa = NULL;
1151 }
1152
1153 static void
sa_build_idx_tab(void * hdr,void * attr_addr,sa_attr_type_t attr,uint16_t length,int length_idx,boolean_t var_length,void * userp)1154 sa_build_idx_tab(void *hdr, void *attr_addr, sa_attr_type_t attr,
1155 uint16_t length, int length_idx, boolean_t var_length, void *userp)
1156 {
1157 sa_idx_tab_t *idx_tab = userp;
1158
1159 if (var_length) {
1160 ASSERT(idx_tab->sa_variable_lengths);
1161 idx_tab->sa_variable_lengths[length_idx] = length;
1162 }
1163 TOC_ATTR_ENCODE(idx_tab->sa_idx_tab[attr], length_idx,
1164 (uint32_t)((uintptr_t)attr_addr - (uintptr_t)hdr));
1165 }
1166
1167 static void
sa_attr_iter(objset_t * os,sa_hdr_phys_t * hdr,dmu_object_type_t type,sa_iterfunc_t func,sa_lot_t * tab,void * userp)1168 sa_attr_iter(objset_t *os, sa_hdr_phys_t *hdr, dmu_object_type_t type,
1169 sa_iterfunc_t func, sa_lot_t *tab, void *userp)
1170 {
1171 void *data_start;
1172 sa_lot_t *tb = tab;
1173 sa_lot_t search;
1174 avl_index_t loc;
1175 sa_os_t *sa = os->os_sa;
1176 int i;
1177 uint16_t *length_start = NULL;
1178 uint8_t length_idx = 0;
1179
1180 if (tab == NULL) {
1181 search.lot_num = SA_LAYOUT_NUM(hdr, type);
1182 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
1183 ASSERT(tb);
1184 }
1185
1186 if (IS_SA_BONUSTYPE(type)) {
1187 data_start = (void *)P2ROUNDUP(((uintptr_t)hdr +
1188 offsetof(sa_hdr_phys_t, sa_lengths) +
1189 (sizeof (uint16_t) * tb->lot_var_sizes)), 8);
1190 length_start = hdr->sa_lengths;
1191 } else {
1192 data_start = hdr;
1193 }
1194
1195 for (i = 0; i != tb->lot_attr_count; i++) {
1196 int attr_length, reg_length;
1197 uint8_t idx_len;
1198
1199 reg_length = sa->sa_attr_table[tb->lot_attrs[i]].sa_length;
1200 IMPLY(reg_length == 0, IS_SA_BONUSTYPE(type));
1201 if (reg_length) {
1202 attr_length = reg_length;
1203 idx_len = 0;
1204 } else {
1205 attr_length = length_start[length_idx];
1206 idx_len = length_idx++;
1207 }
1208
1209 func(hdr, data_start, tb->lot_attrs[i], attr_length,
1210 idx_len, reg_length == 0 ? B_TRUE : B_FALSE, userp);
1211
1212 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
1213 attr_length), 8);
1214 }
1215 }
1216
1217 static void
sa_byteswap_cb(void * hdr,void * attr_addr,sa_attr_type_t attr,uint16_t length,int length_idx,boolean_t variable_length,void * userp)1218 sa_byteswap_cb(void *hdr, void *attr_addr, sa_attr_type_t attr,
1219 uint16_t length, int length_idx, boolean_t variable_length, void *userp)
1220 {
1221 (void) hdr, (void) length_idx, (void) variable_length;
1222 sa_handle_t *hdl = userp;
1223 sa_os_t *sa = hdl->sa_os->os_sa;
1224
1225 sa_bswap_table[sa->sa_attr_table[attr].sa_byteswap](attr_addr, length);
1226 }
1227
1228 static void
sa_byteswap(sa_handle_t * hdl,sa_buf_type_t buftype)1229 sa_byteswap(sa_handle_t *hdl, sa_buf_type_t buftype)
1230 {
1231 sa_hdr_phys_t *sa_hdr_phys = SA_GET_HDR(hdl, buftype);
1232 dmu_buf_impl_t *db;
1233 int num_lengths = 1;
1234 int i;
1235 sa_os_t *sa __maybe_unused = hdl->sa_os->os_sa;
1236
1237 ASSERT(MUTEX_HELD(&sa->sa_lock));
1238 if (sa_hdr_phys->sa_magic == SA_MAGIC)
1239 return;
1240
1241 db = SA_GET_DB(hdl, buftype);
1242
1243 /*
1244 * Acquire db_mtx to protect against concurrent access to the buffer
1245 * by dmu_objset_userquota_get_ids() while we perform byte-swapping.
1246 * We also need it for doing arc_release()/arc_buf_freeze().
1247 */
1248 mutex_enter(&db->db_mtx);
1249
1250 if (buftype == SA_SPILL)
1251 arc_release(db->db_buf, NULL);
1252
1253 sa_hdr_phys->sa_magic = BSWAP_32(sa_hdr_phys->sa_magic);
1254 sa_hdr_phys->sa_layout_info = BSWAP_16(sa_hdr_phys->sa_layout_info);
1255
1256 /*
1257 * Determine number of variable lengths in header
1258 * The standard 8 byte header has one for free and a
1259 * 16 byte header would have 4 + 1;
1260 */
1261 if (SA_HDR_SIZE(sa_hdr_phys) > 8)
1262 num_lengths += (SA_HDR_SIZE(sa_hdr_phys) - 8) >> 1;
1263 for (i = 0; i != num_lengths; i++)
1264 sa_hdr_phys->sa_lengths[i] =
1265 BSWAP_16(sa_hdr_phys->sa_lengths[i]);
1266
1267 sa_attr_iter(hdl->sa_os, sa_hdr_phys, DMU_OT_SA,
1268 sa_byteswap_cb, NULL, hdl);
1269
1270 if (buftype == SA_SPILL)
1271 arc_buf_freeze(db->db_buf);
1272
1273 mutex_exit(&db->db_mtx);
1274 }
1275
1276 static int
sa_build_index(sa_handle_t * hdl,sa_buf_type_t buftype)1277 sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype)
1278 {
1279 sa_hdr_phys_t *sa_hdr_phys;
1280 dmu_buf_impl_t *db = SA_GET_DB(hdl, buftype);
1281 dmu_object_type_t bonustype = SA_BONUSTYPE_FROM_DB(db);
1282 sa_os_t *sa = hdl->sa_os->os_sa;
1283 sa_idx_tab_t *idx_tab;
1284
1285 sa_hdr_phys = SA_GET_HDR(hdl, buftype);
1286
1287 mutex_enter(&sa->sa_lock);
1288
1289 /* Do we need to byteswap? */
1290
1291 /* only check if not old znode */
1292 if (IS_SA_BONUSTYPE(bonustype) && sa_hdr_phys->sa_magic != SA_MAGIC &&
1293 sa_hdr_phys->sa_magic != 0) {
1294 if (BSWAP_32(sa_hdr_phys->sa_magic) != SA_MAGIC) {
1295 mutex_exit(&sa->sa_lock);
1296 zfs_dbgmsg("Buffer Header: %x != SA_MAGIC:%x "
1297 "object=%#llx\n", sa_hdr_phys->sa_magic, SA_MAGIC,
1298 (u_longlong_t)db->db.db_object);
1299 return (SET_ERROR(EIO));
1300 }
1301 sa_byteswap(hdl, buftype);
1302 }
1303
1304 idx_tab = sa_find_idx_tab(hdl->sa_os, bonustype, sa_hdr_phys);
1305
1306 if (buftype == SA_BONUS)
1307 hdl->sa_bonus_tab = idx_tab;
1308 else
1309 hdl->sa_spill_tab = idx_tab;
1310
1311 mutex_exit(&sa->sa_lock);
1312 return (0);
1313 }
1314
1315 static void
sa_evict_sync(void * dbu)1316 sa_evict_sync(void *dbu)
1317 {
1318 (void) dbu;
1319 panic("evicting sa dbuf\n");
1320 }
1321
1322 static void
sa_idx_tab_rele(objset_t * os,void * arg)1323 sa_idx_tab_rele(objset_t *os, void *arg)
1324 {
1325 sa_os_t *sa = os->os_sa;
1326 sa_idx_tab_t *idx_tab = arg;
1327
1328 if (idx_tab == NULL)
1329 return;
1330
1331 mutex_enter(&sa->sa_lock);
1332 if (zfs_refcount_remove(&idx_tab->sa_refcount, NULL) == 0) {
1333 list_remove(&idx_tab->sa_layout->lot_idx_tab, idx_tab);
1334 if (idx_tab->sa_variable_lengths)
1335 kmem_free(idx_tab->sa_variable_lengths,
1336 sizeof (uint16_t) *
1337 idx_tab->sa_layout->lot_var_sizes);
1338 zfs_refcount_destroy(&idx_tab->sa_refcount);
1339 kmem_free(idx_tab->sa_idx_tab,
1340 sizeof (uint32_t) * sa->sa_num_attrs);
1341 kmem_free(idx_tab, sizeof (sa_idx_tab_t));
1342 }
1343 mutex_exit(&sa->sa_lock);
1344 }
1345
1346 static void
sa_idx_tab_hold(objset_t * os,sa_idx_tab_t * idx_tab)1347 sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab)
1348 {
1349 sa_os_t *sa __maybe_unused = os->os_sa;
1350
1351 ASSERT(MUTEX_HELD(&sa->sa_lock));
1352 (void) zfs_refcount_add(&idx_tab->sa_refcount, NULL);
1353 }
1354
1355 void
sa_spill_rele(sa_handle_t * hdl)1356 sa_spill_rele(sa_handle_t *hdl)
1357 {
1358 mutex_enter(&hdl->sa_lock);
1359 if (hdl->sa_spill) {
1360 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
1361 dmu_buf_rele(hdl->sa_spill, NULL);
1362 hdl->sa_spill = NULL;
1363 hdl->sa_spill_tab = NULL;
1364 }
1365 mutex_exit(&hdl->sa_lock);
1366 }
1367
1368 void
sa_handle_destroy(sa_handle_t * hdl)1369 sa_handle_destroy(sa_handle_t *hdl)
1370 {
1371 dmu_buf_t *db = hdl->sa_bonus;
1372
1373 mutex_enter(&hdl->sa_lock);
1374 (void) dmu_buf_remove_user(db, &hdl->sa_dbu);
1375
1376 if (hdl->sa_bonus_tab)
1377 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
1378
1379 if (hdl->sa_spill_tab)
1380 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
1381
1382 dmu_buf_rele(hdl->sa_bonus, NULL);
1383
1384 if (hdl->sa_spill)
1385 dmu_buf_rele(hdl->sa_spill, NULL);
1386 mutex_exit(&hdl->sa_lock);
1387
1388 kmem_cache_free(sa_cache, hdl);
1389 }
1390
1391 int
sa_handle_get_from_db(objset_t * os,dmu_buf_t * db,void * userp,sa_handle_type_t hdl_type,sa_handle_t ** handlepp)1392 sa_handle_get_from_db(objset_t *os, dmu_buf_t *db, void *userp,
1393 sa_handle_type_t hdl_type, sa_handle_t **handlepp)
1394 {
1395 int error = 0;
1396 sa_handle_t *handle = NULL;
1397 #ifdef ZFS_DEBUG
1398 dmu_object_info_t doi;
1399
1400 dmu_object_info_from_db(db, &doi);
1401 ASSERT(doi.doi_bonus_type == DMU_OT_SA ||
1402 doi.doi_bonus_type == DMU_OT_ZNODE);
1403 #endif
1404 /* find handle, if it exists */
1405 /* if one doesn't exist then create a new one, and initialize it */
1406
1407 if (hdl_type == SA_HDL_SHARED)
1408 handle = dmu_buf_get_user(db);
1409
1410 if (handle == NULL) {
1411 sa_handle_t *winner = NULL;
1412
1413 handle = kmem_cache_alloc(sa_cache, KM_SLEEP);
1414 handle->sa_dbu.dbu_evict_func_sync = NULL;
1415 handle->sa_dbu.dbu_evict_func_async = NULL;
1416 handle->sa_userp = userp;
1417 handle->sa_bonus = db;
1418 handle->sa_os = os;
1419 handle->sa_spill = NULL;
1420 handle->sa_bonus_tab = NULL;
1421 handle->sa_spill_tab = NULL;
1422
1423 error = sa_build_index(handle, SA_BONUS);
1424
1425 if (hdl_type == SA_HDL_SHARED) {
1426 dmu_buf_init_user(&handle->sa_dbu, sa_evict_sync, NULL,
1427 NULL);
1428 winner = dmu_buf_set_user_ie(db, &handle->sa_dbu);
1429 }
1430
1431 if (winner != NULL) {
1432 kmem_cache_free(sa_cache, handle);
1433 handle = winner;
1434 }
1435 }
1436 *handlepp = handle;
1437
1438 return (error);
1439 }
1440
1441 int
sa_handle_get(objset_t * objset,uint64_t objid,void * userp,sa_handle_type_t hdl_type,sa_handle_t ** handlepp)1442 sa_handle_get(objset_t *objset, uint64_t objid, void *userp,
1443 sa_handle_type_t hdl_type, sa_handle_t **handlepp)
1444 {
1445 dmu_buf_t *db;
1446 int error;
1447
1448 if ((error = dmu_bonus_hold(objset, objid, NULL, &db)))
1449 return (error);
1450
1451 return (sa_handle_get_from_db(objset, db, userp, hdl_type,
1452 handlepp));
1453 }
1454
1455 int
sa_buf_hold(objset_t * objset,uint64_t obj_num,const void * tag,dmu_buf_t ** db)1456 sa_buf_hold(objset_t *objset, uint64_t obj_num, const void *tag, dmu_buf_t **db)
1457 {
1458 return (dmu_bonus_hold(objset, obj_num, tag, db));
1459 }
1460
1461 void
sa_buf_rele(dmu_buf_t * db,const void * tag)1462 sa_buf_rele(dmu_buf_t *db, const void *tag)
1463 {
1464 dmu_buf_rele(db, tag);
1465 }
1466
1467 static int
sa_lookup_impl(sa_handle_t * hdl,sa_bulk_attr_t * bulk,int count)1468 sa_lookup_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count)
1469 {
1470 ASSERT(hdl);
1471 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1472 return (sa_attr_op(hdl, bulk, count, SA_LOOKUP, NULL));
1473 }
1474
1475 static int
sa_lookup_locked(sa_handle_t * hdl,sa_attr_type_t attr,void * buf,uint32_t buflen)1476 sa_lookup_locked(sa_handle_t *hdl, sa_attr_type_t attr, void *buf,
1477 uint32_t buflen)
1478 {
1479 int error;
1480 sa_bulk_attr_t bulk;
1481
1482 VERIFY3U(buflen, <=, SA_ATTR_MAX_LEN);
1483
1484 bulk.sa_attr = attr;
1485 bulk.sa_data = buf;
1486 bulk.sa_length = buflen;
1487 bulk.sa_data_func = NULL;
1488
1489 ASSERT(hdl);
1490 error = sa_lookup_impl(hdl, &bulk, 1);
1491 return (error);
1492 }
1493
1494 int
sa_lookup(sa_handle_t * hdl,sa_attr_type_t attr,void * buf,uint32_t buflen)1495 sa_lookup(sa_handle_t *hdl, sa_attr_type_t attr, void *buf, uint32_t buflen)
1496 {
1497 int error;
1498
1499 mutex_enter(&hdl->sa_lock);
1500 error = sa_lookup_locked(hdl, attr, buf, buflen);
1501 mutex_exit(&hdl->sa_lock);
1502
1503 return (error);
1504 }
1505
1506 /*
1507 * Return size of an attribute
1508 */
1509
1510 static int
sa_size_locked(sa_handle_t * hdl,sa_attr_type_t attr,int * size)1511 sa_size_locked(sa_handle_t *hdl, sa_attr_type_t attr, int *size)
1512 {
1513 sa_bulk_attr_t bulk;
1514 int error;
1515
1516 bulk.sa_data = NULL;
1517 bulk.sa_attr = attr;
1518 bulk.sa_data_func = NULL;
1519
1520 ASSERT(hdl);
1521 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1522 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) != 0) {
1523 return (error);
1524 }
1525 *size = bulk.sa_size;
1526
1527 return (0);
1528 }
1529
1530 int
sa_size(sa_handle_t * hdl,sa_attr_type_t attr,int * size)1531 sa_size(sa_handle_t *hdl, sa_attr_type_t attr, int *size)
1532 {
1533 int error;
1534
1535 mutex_enter(&hdl->sa_lock);
1536 error = sa_size_locked(hdl, attr, size);
1537 mutex_exit(&hdl->sa_lock);
1538
1539 return (error);
1540 }
1541
1542 #ifdef _KERNEL
1543 int
sa_lookup_uio(sa_handle_t * hdl,sa_attr_type_t attr,zfs_uio_t * uio)1544 sa_lookup_uio(sa_handle_t *hdl, sa_attr_type_t attr, zfs_uio_t *uio)
1545 {
1546 int error;
1547 sa_bulk_attr_t bulk;
1548
1549 bulk.sa_data = NULL;
1550 bulk.sa_attr = attr;
1551 bulk.sa_data_func = NULL;
1552
1553 ASSERT(hdl);
1554
1555 mutex_enter(&hdl->sa_lock);
1556 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) == 0) {
1557 error = zfs_uiomove((void *)bulk.sa_addr, MIN(bulk.sa_size,
1558 zfs_uio_resid(uio)), UIO_READ, uio);
1559 }
1560 mutex_exit(&hdl->sa_lock);
1561 return (error);
1562 }
1563
1564 /*
1565 * For the existed object that is upgraded from old system, its ondisk layout
1566 * has no slot for the project ID attribute. But quota accounting logic needs
1567 * to access related slots by offset directly. So we need to adjust these old
1568 * objects' layout to make the project ID to some unified and fixed offset.
1569 */
1570 int
sa_add_projid(sa_handle_t * hdl,dmu_tx_t * tx,uint64_t projid)1571 sa_add_projid(sa_handle_t *hdl, dmu_tx_t *tx, uint64_t projid)
1572 {
1573 znode_t *zp = sa_get_userdata(hdl);
1574 dmu_buf_t *db = sa_get_db(hdl);
1575 zfsvfs_t *zfsvfs = ZTOZSB(zp);
1576 int count = 0, err = 0;
1577 sa_bulk_attr_t *bulk, *attrs;
1578 zfs_acl_locator_cb_t locate = { 0 };
1579 uint64_t uid, gid, mode, rdev, xattr = 0, parent, gen, links;
1580 uint64_t crtime[2], mtime[2], ctime[2], atime[2];
1581 zfs_acl_phys_t znode_acl = { 0 };
1582 char scanstamp[AV_SCANSTAMP_SZ];
1583 char *dxattr_obj = NULL;
1584 int dxattr_size = 0;
1585
1586 if (zp->z_acl_cached == NULL) {
1587 zfs_acl_t *aclp;
1588
1589 mutex_enter(&zp->z_acl_lock);
1590 err = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
1591 mutex_exit(&zp->z_acl_lock);
1592 if (err != 0 && err != ENOENT)
1593 return (err);
1594 }
1595
1596 bulk = kmem_zalloc(sizeof (sa_bulk_attr_t) * ZPL_END, KM_SLEEP);
1597 attrs = kmem_zalloc(sizeof (sa_bulk_attr_t) * ZPL_END, KM_SLEEP);
1598 mutex_enter(&zp->z_lock);
1599 mutex_enter(&hdl->sa_lock);
1600
1601 err = sa_lookup_locked(hdl, SA_ZPL_PROJID(zfsvfs), &projid,
1602 sizeof (uint64_t));
1603 if (unlikely(err == 0))
1604 /* Someone has added project ID attr by race. */
1605 err = EEXIST;
1606 if (err != ENOENT)
1607 goto out;
1608
1609 /* First do a bulk query of the attributes that aren't cached */
1610 if (zp->z_is_sa) {
1611 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
1612 &mode, 8);
1613 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL,
1614 &gen, 8);
1615 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
1616 &uid, 8);
1617 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
1618 &gid, 8);
1619 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL,
1620 &parent, 8);
1621 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
1622 &atime, 16);
1623 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
1624 &mtime, 16);
1625 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
1626 &ctime, 16);
1627 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL,
1628 &crtime, 16);
1629 if (Z_ISBLK(ZTOTYPE(zp)) || Z_ISCHR(ZTOTYPE(zp)))
1630 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL,
1631 &rdev, 8);
1632 } else {
1633 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
1634 &atime, 16);
1635 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
1636 &mtime, 16);
1637 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
1638 &ctime, 16);
1639 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL,
1640 &crtime, 16);
1641 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL,
1642 &gen, 8);
1643 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
1644 &mode, 8);
1645 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL,
1646 &parent, 8);
1647 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL,
1648 &xattr, 8);
1649 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL,
1650 &rdev, 8);
1651 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
1652 &uid, 8);
1653 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
1654 &gid, 8);
1655 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
1656 &znode_acl, 88);
1657 }
1658 err = sa_bulk_lookup_locked(hdl, bulk, count);
1659 if (err != 0)
1660 goto out;
1661
1662 err = sa_lookup_locked(hdl, SA_ZPL_XATTR(zfsvfs), &xattr, 8);
1663 if (err != 0 && err != ENOENT)
1664 goto out;
1665
1666 err = sa_size_locked(hdl, SA_ZPL_DXATTR(zfsvfs), &dxattr_size);
1667 if (err != 0 && err != ENOENT)
1668 goto out;
1669 if (dxattr_size != 0) {
1670 dxattr_obj = vmem_alloc(dxattr_size, KM_SLEEP);
1671 err = sa_lookup_locked(hdl, SA_ZPL_DXATTR(zfsvfs), dxattr_obj,
1672 dxattr_size);
1673 if (err != 0 && err != ENOENT)
1674 goto out;
1675 }
1676
1677 zp->z_projid = projid;
1678 zp->z_pflags |= ZFS_PROJID;
1679 links = ZTONLNK(zp);
1680 count = 0;
1681 err = 0;
1682
1683 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
1684 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_SIZE(zfsvfs), NULL,
1685 &zp->z_size, 8);
1686 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_GEN(zfsvfs), NULL, &gen, 8);
1687 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
1688 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
1689 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
1690 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL,
1691 &zp->z_pflags, 8);
1692 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_ATIME(zfsvfs), NULL, &atime, 16);
1693 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
1694 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
1695 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL,
1696 &crtime, 16);
1697 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_LINKS(zfsvfs), NULL, &links, 8);
1698 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_PROJID(zfsvfs), NULL, &projid, 8);
1699
1700 if (Z_ISBLK(ZTOTYPE(zp)) || Z_ISCHR(ZTOTYPE(zp)))
1701 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_RDEV(zfsvfs), NULL,
1702 &rdev, 8);
1703
1704 if (zp->z_acl_cached != NULL) {
1705 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
1706 &zp->z_acl_cached->z_acl_count, 8);
1707 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID)
1708 zfs_acl_xform(zp, zp->z_acl_cached, CRED());
1709 locate.cb_aclp = zp->z_acl_cached;
1710 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_DACL_ACES(zfsvfs),
1711 zfs_acl_data_locator, &locate,
1712 zp->z_acl_cached->z_acl_bytes);
1713 }
1714
1715 if (xattr)
1716 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_XATTR(zfsvfs), NULL,
1717 &xattr, 8);
1718
1719 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) {
1720 memcpy(scanstamp,
1721 (caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
1722 AV_SCANSTAMP_SZ);
1723 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_SCANSTAMP(zfsvfs), NULL,
1724 scanstamp, AV_SCANSTAMP_SZ);
1725 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP;
1726 }
1727
1728 if (dxattr_obj) {
1729 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_DXATTR(zfsvfs),
1730 NULL, dxattr_obj, dxattr_size);
1731 }
1732
1733 VERIFY0(dmu_set_bonustype(db, DMU_OT_SA, tx));
1734 VERIFY0(sa_replace_all_by_template_locked(hdl, attrs, count, tx));
1735 if (znode_acl.z_acl_extern_obj) {
1736 VERIFY0(dmu_object_free(zfsvfs->z_os,
1737 znode_acl.z_acl_extern_obj, tx));
1738 }
1739
1740 zp->z_is_sa = B_TRUE;
1741
1742 out:
1743 mutex_exit(&hdl->sa_lock);
1744 mutex_exit(&zp->z_lock);
1745 kmem_free(attrs, sizeof (sa_bulk_attr_t) * ZPL_END);
1746 kmem_free(bulk, sizeof (sa_bulk_attr_t) * ZPL_END);
1747 if (dxattr_obj)
1748 vmem_free(dxattr_obj, dxattr_size);
1749 return (err);
1750 }
1751 #endif
1752
1753 static sa_idx_tab_t *
sa_find_idx_tab(objset_t * os,dmu_object_type_t bonustype,sa_hdr_phys_t * hdr)1754 sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype, sa_hdr_phys_t *hdr)
1755 {
1756 sa_idx_tab_t *idx_tab;
1757 sa_os_t *sa = os->os_sa;
1758 sa_lot_t *tb, search;
1759 avl_index_t loc;
1760
1761 /*
1762 * Deterimine layout number. If SA node and header == 0 then
1763 * force the index table to the dummy "1" empty layout.
1764 *
1765 * The layout number would only be zero for a newly created file
1766 * that has not added any attributes yet, or with crypto enabled which
1767 * doesn't write any attributes to the bonus buffer.
1768 */
1769
1770 search.lot_num = SA_LAYOUT_NUM(hdr, bonustype);
1771
1772 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
1773
1774 /* Verify header size is consistent with layout information */
1775 ASSERT(tb);
1776 ASSERT((IS_SA_BONUSTYPE(bonustype) &&
1777 SA_HDR_SIZE_MATCH_LAYOUT(hdr, tb)) || !IS_SA_BONUSTYPE(bonustype) ||
1778 (IS_SA_BONUSTYPE(bonustype) && hdr->sa_layout_info == 0));
1779
1780 /*
1781 * See if any of the already existing TOC entries can be reused?
1782 */
1783
1784 for (idx_tab = list_head(&tb->lot_idx_tab); idx_tab;
1785 idx_tab = list_next(&tb->lot_idx_tab, idx_tab)) {
1786 boolean_t valid_idx = B_TRUE;
1787 int i;
1788
1789 if (tb->lot_var_sizes != 0 &&
1790 idx_tab->sa_variable_lengths != NULL) {
1791 for (i = 0; i != tb->lot_var_sizes; i++) {
1792 if (hdr->sa_lengths[i] !=
1793 idx_tab->sa_variable_lengths[i]) {
1794 valid_idx = B_FALSE;
1795 break;
1796 }
1797 }
1798 }
1799 if (valid_idx) {
1800 sa_idx_tab_hold(os, idx_tab);
1801 return (idx_tab);
1802 }
1803 }
1804
1805 /* No such luck, create a new entry */
1806 idx_tab = kmem_zalloc(sizeof (sa_idx_tab_t), KM_SLEEP);
1807 idx_tab->sa_idx_tab =
1808 kmem_zalloc(sizeof (uint32_t) * sa->sa_num_attrs, KM_SLEEP);
1809 idx_tab->sa_layout = tb;
1810 zfs_refcount_create(&idx_tab->sa_refcount);
1811 if (tb->lot_var_sizes)
1812 idx_tab->sa_variable_lengths = kmem_alloc(sizeof (uint16_t) *
1813 tb->lot_var_sizes, KM_SLEEP);
1814
1815 sa_attr_iter(os, hdr, bonustype, sa_build_idx_tab,
1816 tb, idx_tab);
1817 sa_idx_tab_hold(os, idx_tab); /* one hold for consumer */
1818 sa_idx_tab_hold(os, idx_tab); /* one for layout */
1819 list_insert_tail(&tb->lot_idx_tab, idx_tab);
1820 return (idx_tab);
1821 }
1822
1823 void
sa_default_locator(void ** dataptr,uint32_t * len,uint32_t total_len,boolean_t start,void * userdata)1824 sa_default_locator(void **dataptr, uint32_t *len, uint32_t total_len,
1825 boolean_t start, void *userdata)
1826 {
1827 ASSERT(start);
1828
1829 *dataptr = userdata;
1830 *len = total_len;
1831 }
1832
1833 static void
sa_attr_register_sync(sa_handle_t * hdl,dmu_tx_t * tx)1834 sa_attr_register_sync(sa_handle_t *hdl, dmu_tx_t *tx)
1835 {
1836 uint64_t attr_value = 0;
1837 sa_os_t *sa = hdl->sa_os->os_sa;
1838 sa_attr_table_t *tb = sa->sa_attr_table;
1839 int i;
1840
1841 mutex_enter(&sa->sa_lock);
1842
1843 if (!sa->sa_need_attr_registration || sa->sa_master_obj == 0) {
1844 mutex_exit(&sa->sa_lock);
1845 return;
1846 }
1847
1848 if (sa->sa_reg_attr_obj == 0) {
1849 sa->sa_reg_attr_obj = zap_create_link(hdl->sa_os,
1850 DMU_OT_SA_ATTR_REGISTRATION,
1851 sa->sa_master_obj, SA_REGISTRY, tx);
1852 }
1853 for (i = 0; i != sa->sa_num_attrs; i++) {
1854 if (sa->sa_attr_table[i].sa_registered)
1855 continue;
1856 ATTR_ENCODE(attr_value, tb[i].sa_attr, tb[i].sa_length,
1857 tb[i].sa_byteswap);
1858 VERIFY0(zap_update(hdl->sa_os, sa->sa_reg_attr_obj,
1859 tb[i].sa_name, 8, 1, &attr_value, tx));
1860 tb[i].sa_registered = B_TRUE;
1861 }
1862 sa->sa_need_attr_registration = B_FALSE;
1863 mutex_exit(&sa->sa_lock);
1864 }
1865
1866 /*
1867 * Replace all attributes with attributes specified in template.
1868 * If dnode had a spill buffer then those attributes will be
1869 * also be replaced, possibly with just an empty spill block
1870 *
1871 * This interface is intended to only be used for bulk adding of
1872 * attributes for a new file. It will also be used by the ZPL
1873 * when converting and old formatted znode to native SA support.
1874 */
1875 int
sa_replace_all_by_template_locked(sa_handle_t * hdl,sa_bulk_attr_t * attr_desc,int attr_count,dmu_tx_t * tx)1876 sa_replace_all_by_template_locked(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
1877 int attr_count, dmu_tx_t *tx)
1878 {
1879 sa_os_t *sa = hdl->sa_os->os_sa;
1880
1881 if (sa->sa_need_attr_registration)
1882 sa_attr_register_sync(hdl, tx);
1883 return (sa_build_layouts(hdl, attr_desc, attr_count, tx));
1884 }
1885
1886 int
sa_replace_all_by_template(sa_handle_t * hdl,sa_bulk_attr_t * attr_desc,int attr_count,dmu_tx_t * tx)1887 sa_replace_all_by_template(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
1888 int attr_count, dmu_tx_t *tx)
1889 {
1890 int error;
1891
1892 mutex_enter(&hdl->sa_lock);
1893 error = sa_replace_all_by_template_locked(hdl, attr_desc,
1894 attr_count, tx);
1895 mutex_exit(&hdl->sa_lock);
1896 return (error);
1897 }
1898
1899 /*
1900 * Add/remove a single attribute or replace a variable-sized attribute value
1901 * with a value of a different size, and then rewrite the entire set
1902 * of attributes.
1903 * Same-length attribute value replacement (including fixed-length attributes)
1904 * is handled more efficiently by the upper layers.
1905 */
1906 static int
sa_modify_attrs(sa_handle_t * hdl,sa_attr_type_t newattr,sa_data_op_t action,sa_data_locator_t * locator,void * datastart,uint16_t buflen,dmu_tx_t * tx)1907 sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
1908 sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
1909 uint16_t buflen, dmu_tx_t *tx)
1910 {
1911 sa_os_t *sa = hdl->sa_os->os_sa;
1912 dmu_buf_impl_t *db = (dmu_buf_impl_t *)hdl->sa_bonus;
1913 sa_bulk_attr_t *attr_desc;
1914 void *old_data[2];
1915 int bonus_attr_count = 0;
1916 int bonus_data_size = 0;
1917 int spill_data_size = 0;
1918 int spill_attr_count = 0;
1919 int error;
1920 uint16_t length, reg_length;
1921 int i, j, k, length_idx;
1922 sa_hdr_phys_t *hdr;
1923 sa_idx_tab_t *idx_tab;
1924 int attr_count;
1925 int count;
1926
1927 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1928
1929 /* First make of copy of the old data */
1930
1931 DB_DNODE_ENTER(db);
1932 if (DB_DNODE(db)->dn_bonuslen != 0) {
1933 bonus_data_size = hdl->sa_bonus->db_size;
1934 old_data[0] = kmem_alloc(bonus_data_size, KM_SLEEP);
1935 memcpy(old_data[0], hdl->sa_bonus->db_data,
1936 hdl->sa_bonus->db_size);
1937 bonus_attr_count = hdl->sa_bonus_tab->sa_layout->lot_attr_count;
1938 } else {
1939 old_data[0] = NULL;
1940 }
1941 DB_DNODE_EXIT(db);
1942
1943 /* Bring spill buffer online if it isn't currently */
1944
1945 if ((error = sa_get_spill(hdl)) == 0) {
1946 spill_data_size = hdl->sa_spill->db_size;
1947 old_data[1] = vmem_alloc(spill_data_size, KM_SLEEP);
1948 memcpy(old_data[1], hdl->sa_spill->db_data,
1949 hdl->sa_spill->db_size);
1950 spill_attr_count =
1951 hdl->sa_spill_tab->sa_layout->lot_attr_count;
1952 } else if (error && error != ENOENT) {
1953 if (old_data[0])
1954 kmem_free(old_data[0], bonus_data_size);
1955 return (error);
1956 } else {
1957 old_data[1] = NULL;
1958 }
1959
1960 /* build descriptor of all attributes */
1961
1962 attr_count = bonus_attr_count + spill_attr_count;
1963 if (action == SA_ADD)
1964 attr_count++;
1965 else if (action == SA_REMOVE)
1966 attr_count--;
1967
1968 attr_desc = kmem_zalloc(sizeof (sa_bulk_attr_t) * attr_count, KM_SLEEP);
1969
1970 /*
1971 * loop through bonus and spill buffer if it exists, and
1972 * build up new attr_descriptor to reset the attributes
1973 */
1974 k = j = 0;
1975 count = bonus_attr_count;
1976 hdr = SA_GET_HDR(hdl, SA_BONUS);
1977 idx_tab = SA_IDX_TAB_GET(hdl, SA_BONUS);
1978 for (; ; k++) {
1979 /*
1980 * Iterate over each attribute in layout. Fetch the
1981 * size of variable-length attributes needing rewrite
1982 * from sa_lengths[].
1983 */
1984 for (i = 0, length_idx = 0; i != count; i++) {
1985 sa_attr_type_t attr;
1986
1987 attr = idx_tab->sa_layout->lot_attrs[i];
1988 reg_length = SA_REGISTERED_LEN(sa, attr);
1989 if (reg_length == 0) {
1990 length = hdr->sa_lengths[length_idx];
1991 length_idx++;
1992 } else {
1993 length = reg_length;
1994 }
1995 if (attr == newattr) {
1996 /*
1997 * There is nothing to do for SA_REMOVE,
1998 * so it is just skipped.
1999 */
2000 if (action == SA_REMOVE)
2001 continue;
2002
2003 /*
2004 * Duplicate attributes are not allowed, so the
2005 * action can not be SA_ADD here.
2006 */
2007 ASSERT3S(action, ==, SA_REPLACE);
2008
2009 /*
2010 * Only a variable-sized attribute can be
2011 * replaced here, and its size must be changing.
2012 */
2013 ASSERT0(reg_length);
2014 ASSERT3U(length, !=, buflen);
2015 SA_ADD_BULK_ATTR(attr_desc, j, attr,
2016 locator, datastart, buflen);
2017 } else {
2018 SA_ADD_BULK_ATTR(attr_desc, j, attr,
2019 NULL, (void *)
2020 (TOC_OFF(idx_tab->sa_idx_tab[attr]) +
2021 (uintptr_t)old_data[k]), length);
2022 }
2023 }
2024 if (k == 0 && hdl->sa_spill) {
2025 hdr = SA_GET_HDR(hdl, SA_SPILL);
2026 idx_tab = SA_IDX_TAB_GET(hdl, SA_SPILL);
2027 count = spill_attr_count;
2028 } else {
2029 break;
2030 }
2031 }
2032 if (action == SA_ADD) {
2033 reg_length = SA_REGISTERED_LEN(sa, newattr);
2034 IMPLY(reg_length != 0, reg_length == buflen);
2035 SA_ADD_BULK_ATTR(attr_desc, j, newattr, locator,
2036 datastart, buflen);
2037 }
2038 ASSERT3U(j, ==, attr_count);
2039
2040 error = sa_build_layouts(hdl, attr_desc, attr_count, tx);
2041
2042 if (old_data[0])
2043 kmem_free(old_data[0], bonus_data_size);
2044 if (old_data[1])
2045 vmem_free(old_data[1], spill_data_size);
2046 kmem_free(attr_desc, sizeof (sa_bulk_attr_t) * attr_count);
2047
2048 return (error);
2049 }
2050
2051 static int
sa_bulk_update_impl(sa_handle_t * hdl,sa_bulk_attr_t * bulk,int count,dmu_tx_t * tx)2052 sa_bulk_update_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
2053 dmu_tx_t *tx)
2054 {
2055 int error;
2056 sa_os_t *sa = hdl->sa_os->os_sa;
2057 dmu_object_type_t bonustype;
2058 dmu_buf_t *saved_spill;
2059
2060 ASSERT(hdl);
2061 ASSERT(MUTEX_HELD(&hdl->sa_lock));
2062
2063 bonustype = SA_BONUSTYPE_FROM_DB(SA_GET_DB(hdl, SA_BONUS));
2064 saved_spill = hdl->sa_spill;
2065
2066 /* sync out registration table if necessary */
2067 if (sa->sa_need_attr_registration)
2068 sa_attr_register_sync(hdl, tx);
2069
2070 error = sa_attr_op(hdl, bulk, count, SA_UPDATE, tx);
2071 if (error == 0 && !IS_SA_BONUSTYPE(bonustype) && sa->sa_update_cb)
2072 sa->sa_update_cb(hdl, tx);
2073
2074 /*
2075 * If saved_spill is NULL and current sa_spill is not NULL that
2076 * means we increased the refcount of the spill buffer through
2077 * sa_get_spill() or dmu_spill_hold_by_dnode(). Therefore we
2078 * must release the hold before calling dmu_tx_commit() to avoid
2079 * making a copy of this buffer in dbuf_sync_leaf() due to the
2080 * reference count now being greater than 1.
2081 */
2082 if (!saved_spill && hdl->sa_spill) {
2083 if (hdl->sa_spill_tab) {
2084 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
2085 hdl->sa_spill_tab = NULL;
2086 }
2087
2088 dmu_buf_rele(hdl->sa_spill, NULL);
2089 hdl->sa_spill = NULL;
2090 }
2091
2092 return (error);
2093 }
2094
2095 /*
2096 * update or add new attribute
2097 */
2098 int
sa_update(sa_handle_t * hdl,sa_attr_type_t type,void * buf,uint32_t buflen,dmu_tx_t * tx)2099 sa_update(sa_handle_t *hdl, sa_attr_type_t type,
2100 void *buf, uint32_t buflen, dmu_tx_t *tx)
2101 {
2102 int error;
2103 sa_bulk_attr_t bulk;
2104
2105 VERIFY3U(buflen, <=, SA_ATTR_MAX_LEN);
2106
2107 bulk.sa_attr = type;
2108 bulk.sa_data_func = NULL;
2109 bulk.sa_length = buflen;
2110 bulk.sa_data = buf;
2111
2112 mutex_enter(&hdl->sa_lock);
2113 error = sa_bulk_update_impl(hdl, &bulk, 1, tx);
2114 mutex_exit(&hdl->sa_lock);
2115 return (error);
2116 }
2117
2118 int
sa_bulk_lookup_locked(sa_handle_t * hdl,sa_bulk_attr_t * attrs,int count)2119 sa_bulk_lookup_locked(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
2120 {
2121 ASSERT(hdl);
2122 ASSERT(MUTEX_HELD(&hdl->sa_lock));
2123 return (sa_lookup_impl(hdl, attrs, count));
2124 }
2125
2126 int
sa_bulk_lookup(sa_handle_t * hdl,sa_bulk_attr_t * attrs,int count)2127 sa_bulk_lookup(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
2128 {
2129 int error;
2130
2131 ASSERT(hdl);
2132 mutex_enter(&hdl->sa_lock);
2133 error = sa_bulk_lookup_locked(hdl, attrs, count);
2134 mutex_exit(&hdl->sa_lock);
2135 return (error);
2136 }
2137
2138 int
sa_bulk_update(sa_handle_t * hdl,sa_bulk_attr_t * attrs,int count,dmu_tx_t * tx)2139 sa_bulk_update(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count, dmu_tx_t *tx)
2140 {
2141 int error;
2142
2143 ASSERT(hdl);
2144 mutex_enter(&hdl->sa_lock);
2145 error = sa_bulk_update_impl(hdl, attrs, count, tx);
2146 mutex_exit(&hdl->sa_lock);
2147 return (error);
2148 }
2149
2150 int
sa_remove(sa_handle_t * hdl,sa_attr_type_t attr,dmu_tx_t * tx)2151 sa_remove(sa_handle_t *hdl, sa_attr_type_t attr, dmu_tx_t *tx)
2152 {
2153 int error;
2154
2155 mutex_enter(&hdl->sa_lock);
2156 error = sa_modify_attrs(hdl, attr, SA_REMOVE, NULL,
2157 NULL, 0, tx);
2158 mutex_exit(&hdl->sa_lock);
2159 return (error);
2160 }
2161
2162 void
sa_object_info(sa_handle_t * hdl,dmu_object_info_t * doi)2163 sa_object_info(sa_handle_t *hdl, dmu_object_info_t *doi)
2164 {
2165 dmu_object_info_from_db(hdl->sa_bonus, doi);
2166 }
2167
2168 void
sa_object_size(sa_handle_t * hdl,uint32_t * blksize,u_longlong_t * nblocks)2169 sa_object_size(sa_handle_t *hdl, uint32_t *blksize, u_longlong_t *nblocks)
2170 {
2171 dmu_object_size_from_db(hdl->sa_bonus,
2172 blksize, nblocks);
2173 }
2174
2175 void
sa_set_userp(sa_handle_t * hdl,void * ptr)2176 sa_set_userp(sa_handle_t *hdl, void *ptr)
2177 {
2178 hdl->sa_userp = ptr;
2179 }
2180
2181 dmu_buf_t *
sa_get_db(sa_handle_t * hdl)2182 sa_get_db(sa_handle_t *hdl)
2183 {
2184 return (hdl->sa_bonus);
2185 }
2186
2187 void *
sa_get_userdata(sa_handle_t * hdl)2188 sa_get_userdata(sa_handle_t *hdl)
2189 {
2190 return (hdl->sa_userp);
2191 }
2192
2193 void
sa_register_update_callback_locked(objset_t * os,sa_update_cb_t * func)2194 sa_register_update_callback_locked(objset_t *os, sa_update_cb_t *func)
2195 {
2196 ASSERT(MUTEX_HELD(&os->os_sa->sa_lock));
2197 os->os_sa->sa_update_cb = func;
2198 }
2199
2200 void
sa_register_update_callback(objset_t * os,sa_update_cb_t * func)2201 sa_register_update_callback(objset_t *os, sa_update_cb_t *func)
2202 {
2203
2204 mutex_enter(&os->os_sa->sa_lock);
2205 sa_register_update_callback_locked(os, func);
2206 mutex_exit(&os->os_sa->sa_lock);
2207 }
2208
2209 uint64_t
sa_handle_object(sa_handle_t * hdl)2210 sa_handle_object(sa_handle_t *hdl)
2211 {
2212 return (hdl->sa_bonus->db_object);
2213 }
2214
2215 boolean_t
sa_enabled(objset_t * os)2216 sa_enabled(objset_t *os)
2217 {
2218 return (os->os_sa == NULL);
2219 }
2220
2221 int
sa_set_sa_object(objset_t * os,uint64_t sa_object)2222 sa_set_sa_object(objset_t *os, uint64_t sa_object)
2223 {
2224 sa_os_t *sa = os->os_sa;
2225
2226 if (sa->sa_master_obj)
2227 return (1);
2228
2229 sa->sa_master_obj = sa_object;
2230
2231 return (0);
2232 }
2233
2234 int
sa_hdrsize(void * arg)2235 sa_hdrsize(void *arg)
2236 {
2237 sa_hdr_phys_t *hdr = arg;
2238
2239 return (SA_HDR_SIZE(hdr));
2240 }
2241
2242 void
sa_handle_lock(sa_handle_t * hdl)2243 sa_handle_lock(sa_handle_t *hdl)
2244 {
2245 ASSERT(hdl);
2246 mutex_enter(&hdl->sa_lock);
2247 }
2248
2249 void
sa_handle_unlock(sa_handle_t * hdl)2250 sa_handle_unlock(sa_handle_t *hdl)
2251 {
2252 ASSERT(hdl);
2253 mutex_exit(&hdl->sa_lock);
2254 }
2255
2256 #ifdef _KERNEL
2257 EXPORT_SYMBOL(sa_handle_get);
2258 EXPORT_SYMBOL(sa_handle_get_from_db);
2259 EXPORT_SYMBOL(sa_handle_destroy);
2260 EXPORT_SYMBOL(sa_buf_hold);
2261 EXPORT_SYMBOL(sa_buf_rele);
2262 EXPORT_SYMBOL(sa_spill_rele);
2263 EXPORT_SYMBOL(sa_lookup);
2264 EXPORT_SYMBOL(sa_update);
2265 EXPORT_SYMBOL(sa_remove);
2266 EXPORT_SYMBOL(sa_bulk_lookup);
2267 EXPORT_SYMBOL(sa_bulk_lookup_locked);
2268 EXPORT_SYMBOL(sa_bulk_update);
2269 EXPORT_SYMBOL(sa_size);
2270 EXPORT_SYMBOL(sa_object_info);
2271 EXPORT_SYMBOL(sa_object_size);
2272 EXPORT_SYMBOL(sa_get_userdata);
2273 EXPORT_SYMBOL(sa_set_userp);
2274 EXPORT_SYMBOL(sa_get_db);
2275 EXPORT_SYMBOL(sa_handle_object);
2276 EXPORT_SYMBOL(sa_register_update_callback);
2277 EXPORT_SYMBOL(sa_setup);
2278 EXPORT_SYMBOL(sa_replace_all_by_template);
2279 EXPORT_SYMBOL(sa_replace_all_by_template_locked);
2280 EXPORT_SYMBOL(sa_enabled);
2281 EXPORT_SYMBOL(sa_cache_init);
2282 EXPORT_SYMBOL(sa_cache_fini);
2283 EXPORT_SYMBOL(sa_set_sa_object);
2284 EXPORT_SYMBOL(sa_hdrsize);
2285 EXPORT_SYMBOL(sa_handle_lock);
2286 EXPORT_SYMBOL(sa_handle_unlock);
2287 EXPORT_SYMBOL(sa_lookup_uio);
2288 EXPORT_SYMBOL(sa_add_projid);
2289 #endif /* _KERNEL */
2290