4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2013, 2017 by Delphix. All rights reserved.
25 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
28 #include <sys/zfs_context.h>
29 #include <sys/types.h>
30 #include <sys/param.h>
31 #include <sys/sysmacros.h>
33 #include <sys/dmu_impl.h>
34 #include <sys/dmu_objset.h>
35 #include <sys/dmu_tx.h>
37 #include <sys/dnode.h>
40 #include <sys/sunddi.h>
41 #include <sys/sa_impl.h>
42 #include <sys/dnode.h>
43 #include <sys/errno.h>
44 #include <sys/zfs_context.h>
47 #include <sys/zfs_znode.h>
51 * ZFS System attributes:
53 * A generic mechanism to allow for arbitrary attributes
54 * to be stored in a dnode. The data will be stored in the bonus buffer of
55 * the dnode and if necessary a special "spill" block will be used to handle
56 * overflow situations. The spill block will be sized to fit the data
57 * from 512 - 128K. When a spill block is used the BP (blkptr_t) for the
58 * spill block is stored at the end of the current bonus buffer. Any
59 * attributes that would be in the way of the blkptr_t will be relocated
60 * into the spill block.
62 * Attribute registration:
64 * Stored persistently on a per dataset basis
65 * a mapping between attribute "string" names and their actual attribute
66 * numeric values, length, and byteswap function. The names are only used
67 * during registration. All attributes are known by their unique attribute
68 * id value. If an attribute can have a variable size then the value
69 * 0 will be used to indicate this.
73 * Attribute layouts are a way to compactly store multiple attributes, but
74 * without taking the overhead associated with managing each attribute
75 * individually. Since you will typically have the same set of attributes
76 * stored in the same order a single table will be used to represent that
77 * layout. The ZPL for example will usually have only about 10 different
78 * layouts (regular files, device files, symlinks,
79 * regular files + scanstamp, files/dir with extended attributes, and then
80 * you have the possibility of all of those minus ACL, because it would
81 * be kicked out into the spill block)
83 * Layouts are simply an array of the attributes and their
84 * ordering i.e. [0, 1, 4, 5, 2]
86 * Each distinct layout is given a unique layout number and that is whats
87 * stored in the header at the beginning of the SA data buffer.
89 * A layout only covers a single dbuf (bonus or spill). If a set of
90 * attributes is split up between the bonus buffer and a spill buffer then
91 * two different layouts will be used. This allows us to byteswap the
92 * spill without looking at the bonus buffer and keeps the on disk format of
93 * the bonus and spill buffer the same.
95 * Adding a single attribute will cause the entire set of attributes to
96 * be rewritten and could result in a new layout number being constructed
97 * as part of the rewrite if no such layout exists for the new set of
98 * attribues. The new attribute will be appended to the end of the already
99 * existing attributes.
101 * Both the attribute registration and attribute layout information are
102 * stored in normal ZAP attributes. Their should be a small number of
103 * known layouts and the set of attributes is assumed to typically be quite
106 * The registered attributes and layout "table" information is maintained
107 * in core and a special "sa_os_t" is attached to the objset_t.
109 * A special interface is provided to allow for quickly applying
110 * a large set of attributes at once. sa_replace_all_by_template() is
111 * used to set an array of attributes. This is used by the ZPL when
112 * creating a brand new file. The template that is passed into the function
113 * specifies the attribute, size for variable length attributes, location of
114 * data and special "data locator" function if the data isn't in a contiguous
117 * Byteswap implications:
119 * Since the SA attributes are not entirely self describing we can't do
120 * the normal byteswap processing. The special ZAP layout attribute and
121 * attribute registration attributes define the byteswap function and the
122 * size of the attributes, unless it is variable sized.
123 * The normal ZFS byteswapping infrastructure assumes you don't need
124 * to read any objects in order to do the necessary byteswapping. Whereas
125 * SA attributes can only be properly byteswapped if the dataset is opened
126 * and the layout/attribute ZAP attributes are available. Because of this
127 * the SA attributes will be byteswapped when they are first accessed by
128 * the SA code that will read the SA data.
131 typedef void (sa_iterfunc_t)(void *hdr, void *addr, sa_attr_type_t,
132 uint16_t length, int length_idx, boolean_t, void *userp);
134 static int sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype);
135 static void sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab);
136 static sa_idx_tab_t *sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype,
138 static void sa_idx_tab_rele(objset_t *os, void *arg);
139 static void sa_copy_data(sa_data_locator_t *func, void *start, void *target,
141 static int sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
142 sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
143 uint16_t buflen, dmu_tx_t *tx);
145 arc_byteswap_func_t sa_bswap_table[] = {
146 byteswap_uint64_array,
147 byteswap_uint32_array,
148 byteswap_uint16_array,
149 byteswap_uint8_array,
153 #ifdef HAVE_EFFICIENT_UNALIGNED_ACCESS
154 #define SA_COPY_DATA(f, s, t, l) \
158 *(uint64_t *)t = *(uint64_t *)s; \
159 } else if (l == 16) { \
160 *(uint64_t *)t = *(uint64_t *)s; \
161 *(uint64_t *)((uintptr_t)t + 8) = \
162 *(uint64_t *)((uintptr_t)s + 8); \
167 sa_copy_data(f, s, t, l); \
171 #define SA_COPY_DATA(f, s, t, l) sa_copy_data(f, s, t, l)
175 * This table is fixed and cannot be changed. Its purpose is to
176 * allow the SA code to work with both old/new ZPL file systems.
177 * It contains the list of legacy attributes. These attributes aren't
178 * stored in the "attribute" registry zap objects, since older ZPL file systems
179 * won't have the registry. Only objsets of type ZFS_TYPE_FILESYSTEM will
180 * use this static table.
182 sa_attr_reg_t sa_legacy_attrs[] = {
183 {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0},
184 {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1},
185 {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2},
186 {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3},
187 {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4},
188 {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5},
189 {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6},
190 {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7},
191 {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8},
192 {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9},
193 {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10},
194 {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11},
195 {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12},
196 {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13},
197 {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14},
198 {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15},
202 * This is only used for objects of type DMU_OT_ZNODE
204 sa_attr_type_t sa_legacy_zpl_layout[] = {
205 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
209 * Special dummy layout used for buffers with no attributes.
211 sa_attr_type_t sa_dummy_zpl_layout[] = { 0 };
213 static int sa_legacy_attr_count = ARRAY_SIZE(sa_legacy_attrs);
214 static kmem_cache_t *sa_cache = NULL;
218 sa_cache_constructor(void *buf, void *unused, int kmflag)
220 sa_handle_t *hdl = buf;
222 mutex_init(&hdl->sa_lock, NULL, MUTEX_DEFAULT, NULL);
228 sa_cache_destructor(void *buf, void *unused)
230 sa_handle_t *hdl = buf;
231 mutex_destroy(&hdl->sa_lock);
237 sa_cache = kmem_cache_create("sa_cache",
238 sizeof (sa_handle_t), 0, sa_cache_constructor,
239 sa_cache_destructor, NULL, NULL, NULL, 0);
246 kmem_cache_destroy(sa_cache);
250 layout_num_compare(const void *arg1, const void *arg2)
252 const sa_lot_t *node1 = (const sa_lot_t *)arg1;
253 const sa_lot_t *node2 = (const sa_lot_t *)arg2;
255 return (AVL_CMP(node1->lot_num, node2->lot_num));
259 layout_hash_compare(const void *arg1, const void *arg2)
261 const sa_lot_t *node1 = (const sa_lot_t *)arg1;
262 const sa_lot_t *node2 = (const sa_lot_t *)arg2;
264 int cmp = AVL_CMP(node1->lot_hash, node2->lot_hash);
268 return (AVL_CMP(node1->lot_instance, node2->lot_instance));
272 sa_layout_equal(sa_lot_t *tbf, sa_attr_type_t *attrs, int count)
276 if (count != tbf->lot_attr_count)
279 for (i = 0; i != count; i++) {
280 if (attrs[i] != tbf->lot_attrs[i])
286 #define SA_ATTR_HASH(attr) (zfs_crc64_table[(-1ULL ^ attr) & 0xFF])
289 sa_layout_info_hash(sa_attr_type_t *attrs, int attr_count)
292 uint64_t crc = -1ULL;
294 for (i = 0; i != attr_count; i++)
295 crc ^= SA_ATTR_HASH(attrs[i]);
301 sa_get_spill(sa_handle_t *hdl)
304 if (hdl->sa_spill == NULL) {
305 if ((rc = dmu_spill_hold_existing(hdl->sa_bonus, NULL,
306 &hdl->sa_spill)) == 0)
307 VERIFY(0 == sa_build_index(hdl, SA_SPILL));
316 * Main attribute lookup/update function
317 * returns 0 for success or non zero for failures
319 * Operates on bulk array, first failure will abort further processing
322 sa_attr_op(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
323 sa_data_op_t data_op, dmu_tx_t *tx)
325 sa_os_t *sa = hdl->sa_os->os_sa;
328 sa_buf_type_t buftypes;
333 for (i = 0; i != count; i++) {
334 ASSERT(bulk[i].sa_attr <= hdl->sa_os->os_sa->sa_num_attrs);
336 bulk[i].sa_addr = NULL;
337 /* First check the bonus buffer */
339 if (hdl->sa_bonus_tab && TOC_ATTR_PRESENT(
340 hdl->sa_bonus_tab->sa_idx_tab[bulk[i].sa_attr])) {
341 SA_ATTR_INFO(sa, hdl->sa_bonus_tab,
342 SA_GET_HDR(hdl, SA_BONUS),
343 bulk[i].sa_attr, bulk[i], SA_BONUS, hdl);
344 if (tx && !(buftypes & SA_BONUS)) {
345 dmu_buf_will_dirty(hdl->sa_bonus, tx);
346 buftypes |= SA_BONUS;
349 if (bulk[i].sa_addr == NULL &&
350 ((error = sa_get_spill(hdl)) == 0)) {
351 if (TOC_ATTR_PRESENT(
352 hdl->sa_spill_tab->sa_idx_tab[bulk[i].sa_attr])) {
353 SA_ATTR_INFO(sa, hdl->sa_spill_tab,
354 SA_GET_HDR(hdl, SA_SPILL),
355 bulk[i].sa_attr, bulk[i], SA_SPILL, hdl);
356 if (tx && !(buftypes & SA_SPILL) &&
357 bulk[i].sa_size == bulk[i].sa_length) {
358 dmu_buf_will_dirty(hdl->sa_spill, tx);
359 buftypes |= SA_SPILL;
363 if (error && error != ENOENT) {
364 return ((error == ECKSUM) ? EIO : error);
369 if (bulk[i].sa_addr == NULL)
370 return (SET_ERROR(ENOENT));
371 if (bulk[i].sa_data) {
372 SA_COPY_DATA(bulk[i].sa_data_func,
373 bulk[i].sa_addr, bulk[i].sa_data,
379 /* existing rewrite of attr */
380 if (bulk[i].sa_addr &&
381 bulk[i].sa_size == bulk[i].sa_length) {
382 SA_COPY_DATA(bulk[i].sa_data_func,
383 bulk[i].sa_data, bulk[i].sa_addr,
386 } else if (bulk[i].sa_addr) { /* attr size change */
387 error = sa_modify_attrs(hdl, bulk[i].sa_attr,
388 SA_REPLACE, bulk[i].sa_data_func,
389 bulk[i].sa_data, bulk[i].sa_length, tx);
390 } else { /* adding new attribute */
391 error = sa_modify_attrs(hdl, bulk[i].sa_attr,
392 SA_ADD, bulk[i].sa_data_func,
393 bulk[i].sa_data, bulk[i].sa_length, tx);
406 sa_add_layout_entry(objset_t *os, sa_attr_type_t *attrs, int attr_count,
407 uint64_t lot_num, uint64_t hash, boolean_t zapadd, dmu_tx_t *tx)
409 sa_os_t *sa = os->os_sa;
410 sa_lot_t *tb, *findtb;
414 ASSERT(MUTEX_HELD(&sa->sa_lock));
415 tb = kmem_zalloc(sizeof (sa_lot_t), KM_SLEEP);
416 tb->lot_attr_count = attr_count;
417 tb->lot_attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
419 bcopy(attrs, tb->lot_attrs, sizeof (sa_attr_type_t) * attr_count);
420 tb->lot_num = lot_num;
422 tb->lot_instance = 0;
427 if (sa->sa_layout_attr_obj == 0) {
428 sa->sa_layout_attr_obj = zap_create_link(os,
429 DMU_OT_SA_ATTR_LAYOUTS,
430 sa->sa_master_obj, SA_LAYOUTS, tx);
433 (void) snprintf(attr_name, sizeof (attr_name),
435 VERIFY(0 == zap_update(os, os->os_sa->sa_layout_attr_obj,
436 attr_name, 2, attr_count, attrs, tx));
439 list_create(&tb->lot_idx_tab, sizeof (sa_idx_tab_t),
440 offsetof(sa_idx_tab_t, sa_next));
442 for (i = 0; i != attr_count; i++) {
443 if (sa->sa_attr_table[tb->lot_attrs[i]].sa_length == 0)
447 avl_add(&sa->sa_layout_num_tree, tb);
449 /* verify we don't have a hash collision */
450 if ((findtb = avl_find(&sa->sa_layout_hash_tree, tb, &loc)) != NULL) {
451 for (; findtb && findtb->lot_hash == hash;
452 findtb = AVL_NEXT(&sa->sa_layout_hash_tree, findtb)) {
453 if (findtb->lot_instance != tb->lot_instance)
458 avl_add(&sa->sa_layout_hash_tree, tb);
463 sa_find_layout(objset_t *os, uint64_t hash, sa_attr_type_t *attrs,
464 int count, dmu_tx_t *tx, sa_lot_t **lot)
466 sa_lot_t *tb, tbsearch;
468 sa_os_t *sa = os->os_sa;
469 boolean_t found = B_FALSE;
471 mutex_enter(&sa->sa_lock);
472 tbsearch.lot_hash = hash;
473 tbsearch.lot_instance = 0;
474 tb = avl_find(&sa->sa_layout_hash_tree, &tbsearch, &loc);
476 for (; tb && tb->lot_hash == hash;
477 tb = AVL_NEXT(&sa->sa_layout_hash_tree, tb)) {
478 if (sa_layout_equal(tb, attrs, count) == 0) {
485 tb = sa_add_layout_entry(os, attrs, count,
486 avl_numnodes(&sa->sa_layout_num_tree), hash, B_TRUE, tx);
488 mutex_exit(&sa->sa_lock);
493 sa_resize_spill(sa_handle_t *hdl, uint32_t size, dmu_tx_t *tx)
499 blocksize = SPA_MINBLOCKSIZE;
500 } else if (size > SPA_OLD_MAXBLOCKSIZE) {
502 return (SET_ERROR(EFBIG));
504 blocksize = P2ROUNDUP_TYPED(size, SPA_MINBLOCKSIZE, uint32_t);
507 error = dbuf_spill_set_blksz(hdl->sa_spill, blocksize, tx);
513 sa_copy_data(sa_data_locator_t *func, void *datastart, void *target, int buflen)
516 bcopy(datastart, target, buflen);
521 void *saptr = target;
526 while (bytes < buflen) {
527 func(&dataptr, &length, buflen, start, datastart);
528 bcopy(dataptr, saptr, length);
529 saptr = (void *)((caddr_t)saptr + length);
537 * Determine several different values pertaining to system attribute
540 * Return the size of the sa_hdr_phys_t header for the buffer. Each
541 * variable length attribute except the first contributes two bytes to
542 * the header size, which is then rounded up to an 8-byte boundary.
544 * The following output parameters are also computed.
546 * index - The index of the first attribute in attr_desc that will
547 * spill over. Only valid if will_spill is set.
549 * total - The total number of bytes of all system attributes described
552 * will_spill - Set when spilling is necessary. It is only set when
553 * the buftype is SA_BONUS.
556 sa_find_sizes(sa_os_t *sa, sa_bulk_attr_t *attr_desc, int attr_count,
557 dmu_buf_t *db, sa_buf_type_t buftype, int full_space, int *index,
558 int *total, boolean_t *will_spill)
560 int var_size_count = 0;
565 if (buftype == SA_BONUS && sa->sa_force_spill) {
568 *will_spill = B_TRUE;
574 *will_spill = B_FALSE;
577 hdrsize = (SA_BONUSTYPE_FROM_DB(db) == DMU_OT_ZNODE) ? 0 :
578 sizeof (sa_hdr_phys_t);
580 ASSERT(IS_P2ALIGNED(full_space, 8));
582 for (i = 0; i != attr_count; i++) {
583 boolean_t is_var_sz, might_spill_here;
586 *total = P2ROUNDUP(*total, 8);
587 *total += attr_desc[i].sa_length;
591 is_var_sz = (SA_REGISTERED_LEN(sa, attr_desc[i].sa_attr) == 0);
596 * Calculate what the SA header size would be if this
597 * attribute doesn't spill.
599 tmp_hdrsize = hdrsize + ((is_var_sz && var_size_count > 1) ?
600 sizeof (uint16_t) : 0);
603 * Check whether this attribute spans into the space
604 * that would be used by the spill block pointer should
605 * a spill block be needed.
608 buftype == SA_BONUS && *index == -1 &&
609 (*total + P2ROUNDUP(tmp_hdrsize, 8)) >
610 (full_space - sizeof (blkptr_t));
612 if (is_var_sz && var_size_count > 1) {
613 if (buftype == SA_SPILL ||
614 tmp_hdrsize + *total < full_space) {
616 * Record the extra header size in case this
617 * increase needs to be reversed due to
620 hdrsize = tmp_hdrsize;
621 if (*index != -1 || might_spill_here)
622 extra_hdrsize += sizeof (uint16_t);
624 ASSERT(buftype == SA_BONUS);
627 *will_spill = B_TRUE;
633 * Store index of where spill *could* occur. Then
634 * continue to count the remaining attribute sizes. The
635 * sum is used later for sizing bonus and spill buffer.
637 if (might_spill_here)
640 if ((*total + P2ROUNDUP(hdrsize, 8)) > full_space &&
642 *will_spill = B_TRUE;
646 hdrsize -= extra_hdrsize;
648 hdrsize = P2ROUNDUP(hdrsize, 8);
652 #define BUF_SPACE_NEEDED(total, header) (total + header)
655 * Find layout that corresponds to ordering of attributes
656 * If not found a new layout number is created and added to
657 * persistent layout tables.
660 sa_build_layouts(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, int attr_count,
663 sa_os_t *sa = hdl->sa_os->os_sa;
665 sa_buf_type_t buftype;
666 sa_hdr_phys_t *sahdr;
668 sa_attr_type_t *attrs, *attrs_start;
673 int spillhdrsize = 0;
675 dmu_object_type_t bonustype;
682 dmu_buf_will_dirty(hdl->sa_bonus, tx);
683 bonustype = SA_BONUSTYPE_FROM_DB(hdl->sa_bonus);
684 dmu_object_dnsize_from_db(hdl->sa_bonus, &dnodesize);
685 bonuslen = DN_BONUS_SIZE(dnodesize);
687 /* first determine bonus header size and sum of all attributes */
688 hdrsize = sa_find_sizes(sa, attr_desc, attr_count, hdl->sa_bonus,
689 SA_BONUS, bonuslen, &spill_idx, &used, &spilling);
691 if (used > SPA_OLD_MAXBLOCKSIZE)
692 return (SET_ERROR(EFBIG));
694 VERIFY0(dmu_set_bonus(hdl->sa_bonus, spilling ?
695 MIN(bonuslen - sizeof (blkptr_t), used + hdrsize) :
696 used + hdrsize, tx));
698 ASSERT((bonustype == DMU_OT_ZNODE && spilling == 0) ||
699 bonustype == DMU_OT_SA);
701 /* setup and size spill buffer when needed */
705 if (hdl->sa_spill == NULL) {
706 VERIFY(dmu_spill_hold_by_bonus(hdl->sa_bonus, 0, NULL,
707 &hdl->sa_spill) == 0);
709 dmu_buf_will_dirty(hdl->sa_spill, tx);
711 spillhdrsize = sa_find_sizes(sa, &attr_desc[spill_idx],
712 attr_count - spill_idx, hdl->sa_spill, SA_SPILL,
713 hdl->sa_spill->db_size, &i, &spill_used, &dummy);
715 if (spill_used > SPA_OLD_MAXBLOCKSIZE)
716 return (SET_ERROR(EFBIG));
718 if (BUF_SPACE_NEEDED(spill_used, spillhdrsize) >
719 hdl->sa_spill->db_size)
720 VERIFY(0 == sa_resize_spill(hdl,
721 BUF_SPACE_NEEDED(spill_used, spillhdrsize), tx));
724 /* setup starting pointers to lay down data */
725 data_start = (void *)((uintptr_t)hdl->sa_bonus->db_data + hdrsize);
726 sahdr = (sa_hdr_phys_t *)hdl->sa_bonus->db_data;
729 attrs_start = attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
733 for (i = 0, len_idx = 0, hash = -1ULL; i != attr_count; i++) {
736 ASSERT(IS_P2ALIGNED(data_start, 8));
737 attrs[i] = attr_desc[i].sa_attr;
738 length = SA_REGISTERED_LEN(sa, attrs[i]);
740 length = attr_desc[i].sa_length;
742 if (spilling && i == spill_idx) { /* switch to spill buffer */
743 VERIFY(bonustype == DMU_OT_SA);
744 if (buftype == SA_BONUS && !sa->sa_force_spill) {
745 sa_find_layout(hdl->sa_os, hash, attrs_start,
746 lot_count, tx, &lot);
747 SA_SET_HDR(sahdr, lot->lot_num, hdrsize);
754 sahdr = (sa_hdr_phys_t *)hdl->sa_spill->db_data;
755 sahdr->sa_magic = SA_MAGIC;
756 data_start = (void *)((uintptr_t)sahdr +
758 attrs_start = &attrs[i];
761 hash ^= SA_ATTR_HASH(attrs[i]);
762 attr_desc[i].sa_addr = data_start;
763 attr_desc[i].sa_size = length;
764 SA_COPY_DATA(attr_desc[i].sa_data_func, attr_desc[i].sa_data,
766 if (sa->sa_attr_table[attrs[i]].sa_length == 0) {
767 sahdr->sa_lengths[len_idx++] = length;
769 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
774 sa_find_layout(hdl->sa_os, hash, attrs_start, lot_count, tx, &lot);
777 * Verify that old znodes always have layout number 0.
778 * Must be DMU_OT_SA for arbitrary layouts
780 VERIFY((bonustype == DMU_OT_ZNODE && lot->lot_num == 0) ||
781 (bonustype == DMU_OT_SA && lot->lot_num > 1));
783 if (bonustype == DMU_OT_SA) {
784 SA_SET_HDR(sahdr, lot->lot_num,
785 buftype == SA_BONUS ? hdrsize : spillhdrsize);
788 kmem_free(attrs, sizeof (sa_attr_type_t) * attr_count);
789 if (hdl->sa_bonus_tab) {
790 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
791 hdl->sa_bonus_tab = NULL;
793 if (!sa->sa_force_spill)
794 VERIFY(0 == sa_build_index(hdl, SA_BONUS));
796 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
799 * remove spill block that is no longer needed.
801 dmu_buf_rele(hdl->sa_spill, NULL);
802 hdl->sa_spill = NULL;
803 hdl->sa_spill_tab = NULL;
804 VERIFY(0 == dmu_rm_spill(hdl->sa_os,
805 sa_handle_object(hdl), tx));
807 VERIFY(0 == sa_build_index(hdl, SA_SPILL));
815 sa_free_attr_table(sa_os_t *sa)
819 if (sa->sa_attr_table == NULL)
822 for (i = 0; i != sa->sa_num_attrs; i++) {
823 if (sa->sa_attr_table[i].sa_name)
824 kmem_free(sa->sa_attr_table[i].sa_name,
825 strlen(sa->sa_attr_table[i].sa_name) + 1);
828 kmem_free(sa->sa_attr_table,
829 sizeof (sa_attr_table_t) * sa->sa_num_attrs);
831 sa->sa_attr_table = NULL;
835 sa_attr_table_setup(objset_t *os, sa_attr_reg_t *reg_attrs, int count)
837 sa_os_t *sa = os->os_sa;
838 uint64_t sa_attr_count = 0;
839 uint64_t sa_reg_count = 0;
845 int registered_count = 0;
847 dmu_objset_type_t ostype = dmu_objset_type(os);
850 kmem_zalloc(count * sizeof (sa_attr_type_t), KM_SLEEP);
851 sa->sa_user_table_sz = count * sizeof (sa_attr_type_t);
853 if (sa->sa_reg_attr_obj != 0) {
854 error = zap_count(os, sa->sa_reg_attr_obj,
858 * Make sure we retrieved a count and that it isn't zero
860 if (error || (error == 0 && sa_attr_count == 0)) {
862 error = SET_ERROR(EINVAL);
865 sa_reg_count = sa_attr_count;
868 if (ostype == DMU_OST_ZFS && sa_attr_count == 0)
869 sa_attr_count += sa_legacy_attr_count;
871 /* Allocate attribute numbers for attributes that aren't registered */
872 for (i = 0; i != count; i++) {
873 boolean_t found = B_FALSE;
876 if (ostype == DMU_OST_ZFS) {
877 for (j = 0; j != sa_legacy_attr_count; j++) {
878 if (strcmp(reg_attrs[i].sa_name,
879 sa_legacy_attrs[j].sa_name) == 0) {
880 sa->sa_user_table[i] =
881 sa_legacy_attrs[j].sa_attr;
889 if (sa->sa_reg_attr_obj)
890 error = zap_lookup(os, sa->sa_reg_attr_obj,
891 reg_attrs[i].sa_name, 8, 1, &attr_value);
893 error = SET_ERROR(ENOENT);
896 sa->sa_user_table[i] = (sa_attr_type_t)sa_attr_count;
900 sa->sa_user_table[i] = ATTR_NUM(attr_value);
907 sa->sa_num_attrs = sa_attr_count;
908 tb = sa->sa_attr_table =
909 kmem_zalloc(sizeof (sa_attr_table_t) * sa_attr_count, KM_SLEEP);
912 * Attribute table is constructed from requested attribute list,
913 * previously foreign registered attributes, and also the legacy
914 * ZPL set of attributes.
917 if (sa->sa_reg_attr_obj) {
918 for (zap_cursor_init(&zc, os, sa->sa_reg_attr_obj);
919 (error = zap_cursor_retrieve(&zc, &za)) == 0;
920 zap_cursor_advance(&zc)) {
922 value = za.za_first_integer;
925 tb[ATTR_NUM(value)].sa_attr = ATTR_NUM(value);
926 tb[ATTR_NUM(value)].sa_length = ATTR_LENGTH(value);
927 tb[ATTR_NUM(value)].sa_byteswap = ATTR_BSWAP(value);
928 tb[ATTR_NUM(value)].sa_registered = B_TRUE;
930 if (tb[ATTR_NUM(value)].sa_name) {
933 tb[ATTR_NUM(value)].sa_name =
934 kmem_zalloc(strlen(za.za_name) +1, KM_SLEEP);
935 (void) strlcpy(tb[ATTR_NUM(value)].sa_name, za.za_name,
936 strlen(za.za_name) +1);
938 zap_cursor_fini(&zc);
940 * Make sure we processed the correct number of registered
943 if (registered_count != sa_reg_count) {
950 if (ostype == DMU_OST_ZFS) {
951 for (i = 0; i != sa_legacy_attr_count; i++) {
954 tb[i].sa_attr = sa_legacy_attrs[i].sa_attr;
955 tb[i].sa_length = sa_legacy_attrs[i].sa_length;
956 tb[i].sa_byteswap = sa_legacy_attrs[i].sa_byteswap;
957 tb[i].sa_registered = B_FALSE;
959 kmem_zalloc(strlen(sa_legacy_attrs[i].sa_name) +1,
961 (void) strlcpy(tb[i].sa_name,
962 sa_legacy_attrs[i].sa_name,
963 strlen(sa_legacy_attrs[i].sa_name) + 1);
967 for (i = 0; i != count; i++) {
968 sa_attr_type_t attr_id;
970 attr_id = sa->sa_user_table[i];
971 if (tb[attr_id].sa_name)
974 tb[attr_id].sa_length = reg_attrs[i].sa_length;
975 tb[attr_id].sa_byteswap = reg_attrs[i].sa_byteswap;
976 tb[attr_id].sa_attr = attr_id;
977 tb[attr_id].sa_name =
978 kmem_zalloc(strlen(reg_attrs[i].sa_name) + 1, KM_SLEEP);
979 (void) strlcpy(tb[attr_id].sa_name, reg_attrs[i].sa_name,
980 strlen(reg_attrs[i].sa_name) + 1);
983 sa->sa_need_attr_registration =
984 (sa_attr_count != registered_count);
988 kmem_free(sa->sa_user_table, count * sizeof (sa_attr_type_t));
989 sa->sa_user_table = NULL;
990 sa_free_attr_table(sa);
996 sa_setup(objset_t *os, uint64_t sa_obj, sa_attr_reg_t *reg_attrs, int count,
997 sa_attr_type_t **user_table)
1002 dmu_objset_type_t ostype = dmu_objset_type(os);
1006 mutex_enter(&os->os_user_ptr_lock);
1008 mutex_enter(&os->os_sa->sa_lock);
1009 mutex_exit(&os->os_user_ptr_lock);
1010 tb = os->os_sa->sa_user_table;
1011 mutex_exit(&os->os_sa->sa_lock);
1016 sa = kmem_zalloc(sizeof (sa_os_t), KM_SLEEP);
1017 mutex_init(&sa->sa_lock, NULL, MUTEX_DEFAULT, NULL);
1018 sa->sa_master_obj = sa_obj;
1021 mutex_enter(&sa->sa_lock);
1022 mutex_exit(&os->os_user_ptr_lock);
1023 avl_create(&sa->sa_layout_num_tree, layout_num_compare,
1024 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_num_node));
1025 avl_create(&sa->sa_layout_hash_tree, layout_hash_compare,
1026 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_hash_node));
1029 error = zap_lookup(os, sa_obj, SA_LAYOUTS,
1030 8, 1, &sa->sa_layout_attr_obj);
1031 if (error != 0 && error != ENOENT)
1033 error = zap_lookup(os, sa_obj, SA_REGISTRY,
1034 8, 1, &sa->sa_reg_attr_obj);
1035 if (error != 0 && error != ENOENT)
1039 if ((error = sa_attr_table_setup(os, reg_attrs, count)) != 0)
1042 if (sa->sa_layout_attr_obj != 0) {
1043 uint64_t layout_count;
1045 error = zap_count(os, sa->sa_layout_attr_obj,
1049 * Layout number count should be > 0
1051 if (error || (error == 0 && layout_count == 0)) {
1053 error = SET_ERROR(EINVAL);
1057 for (zap_cursor_init(&zc, os, sa->sa_layout_attr_obj);
1058 (error = zap_cursor_retrieve(&zc, &za)) == 0;
1059 zap_cursor_advance(&zc)) {
1060 sa_attr_type_t *lot_attrs;
1063 lot_attrs = kmem_zalloc(sizeof (sa_attr_type_t) *
1064 za.za_num_integers, KM_SLEEP);
1066 if ((error = (zap_lookup(os, sa->sa_layout_attr_obj,
1067 za.za_name, 2, za.za_num_integers,
1068 lot_attrs))) != 0) {
1069 kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
1070 za.za_num_integers);
1073 VERIFY(ddi_strtoull(za.za_name, NULL, 10,
1074 (unsigned long long *)&lot_num) == 0);
1076 (void) sa_add_layout_entry(os, lot_attrs,
1077 za.za_num_integers, lot_num,
1078 sa_layout_info_hash(lot_attrs,
1079 za.za_num_integers), B_FALSE, NULL);
1080 kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
1081 za.za_num_integers);
1083 zap_cursor_fini(&zc);
1086 * Make sure layout count matches number of entries added
1089 if (avl_numnodes(&sa->sa_layout_num_tree) != layout_count) {
1095 /* Add special layout number for old ZNODES */
1096 if (ostype == DMU_OST_ZFS) {
1097 (void) sa_add_layout_entry(os, sa_legacy_zpl_layout,
1098 sa_legacy_attr_count, 0,
1099 sa_layout_info_hash(sa_legacy_zpl_layout,
1100 sa_legacy_attr_count), B_FALSE, NULL);
1102 (void) sa_add_layout_entry(os, sa_dummy_zpl_layout, 0, 1,
1105 *user_table = os->os_sa->sa_user_table;
1106 mutex_exit(&sa->sa_lock);
1110 sa_free_attr_table(sa);
1111 if (sa->sa_user_table)
1112 kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
1113 mutex_exit(&sa->sa_lock);
1114 avl_destroy(&sa->sa_layout_hash_tree);
1115 avl_destroy(&sa->sa_layout_num_tree);
1116 mutex_destroy(&sa->sa_lock);
1117 kmem_free(sa, sizeof (sa_os_t));
1118 return ((error == ECKSUM) ? EIO : error);
1122 sa_tear_down(objset_t *os)
1124 sa_os_t *sa = os->os_sa;
1128 kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
1130 /* Free up attr table */
1132 sa_free_attr_table(sa);
1136 avl_destroy_nodes(&sa->sa_layout_hash_tree, &cookie))) {
1138 while ((tab = list_head(&layout->lot_idx_tab))) {
1139 ASSERT(zfs_refcount_count(&tab->sa_refcount));
1140 sa_idx_tab_rele(os, tab);
1145 while ((layout = avl_destroy_nodes(&sa->sa_layout_num_tree, &cookie))) {
1146 kmem_free(layout->lot_attrs,
1147 sizeof (sa_attr_type_t) * layout->lot_attr_count);
1148 kmem_free(layout, sizeof (sa_lot_t));
1151 avl_destroy(&sa->sa_layout_hash_tree);
1152 avl_destroy(&sa->sa_layout_num_tree);
1153 mutex_destroy(&sa->sa_lock);
1155 kmem_free(sa, sizeof (sa_os_t));
1160 sa_build_idx_tab(void *hdr, void *attr_addr, sa_attr_type_t attr,
1161 uint16_t length, int length_idx, boolean_t var_length, void *userp)
1163 sa_idx_tab_t *idx_tab = userp;
1166 ASSERT(idx_tab->sa_variable_lengths);
1167 idx_tab->sa_variable_lengths[length_idx] = length;
1169 TOC_ATTR_ENCODE(idx_tab->sa_idx_tab[attr], length_idx,
1170 (uint32_t)((uintptr_t)attr_addr - (uintptr_t)hdr));
1174 sa_attr_iter(objset_t *os, sa_hdr_phys_t *hdr, dmu_object_type_t type,
1175 sa_iterfunc_t func, sa_lot_t *tab, void *userp)
1181 sa_os_t *sa = os->os_sa;
1183 uint16_t *length_start = NULL;
1184 uint8_t length_idx = 0;
1187 search.lot_num = SA_LAYOUT_NUM(hdr, type);
1188 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
1192 if (IS_SA_BONUSTYPE(type)) {
1193 data_start = (void *)P2ROUNDUP(((uintptr_t)hdr +
1194 offsetof(sa_hdr_phys_t, sa_lengths) +
1195 (sizeof (uint16_t) * tb->lot_var_sizes)), 8);
1196 length_start = hdr->sa_lengths;
1201 for (i = 0; i != tb->lot_attr_count; i++) {
1202 int attr_length, reg_length;
1205 reg_length = sa->sa_attr_table[tb->lot_attrs[i]].sa_length;
1207 attr_length = reg_length;
1210 attr_length = length_start[length_idx];
1211 idx_len = length_idx++;
1214 func(hdr, data_start, tb->lot_attrs[i], attr_length,
1215 idx_len, reg_length == 0 ? B_TRUE : B_FALSE, userp);
1217 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
1224 sa_byteswap_cb(void *hdr, void *attr_addr, sa_attr_type_t attr,
1225 uint16_t length, int length_idx, boolean_t variable_length, void *userp)
1227 sa_handle_t *hdl = userp;
1228 sa_os_t *sa = hdl->sa_os->os_sa;
1230 sa_bswap_table[sa->sa_attr_table[attr].sa_byteswap](attr_addr, length);
1234 sa_byteswap(sa_handle_t *hdl, sa_buf_type_t buftype)
1236 sa_hdr_phys_t *sa_hdr_phys = SA_GET_HDR(hdl, buftype);
1238 int num_lengths = 1;
1240 ASSERTV(sa_os_t *sa = hdl->sa_os->os_sa);
1242 ASSERT(MUTEX_HELD(&sa->sa_lock));
1243 if (sa_hdr_phys->sa_magic == SA_MAGIC)
1246 db = SA_GET_DB(hdl, buftype);
1248 if (buftype == SA_SPILL) {
1249 arc_release(db->db_buf, NULL);
1250 arc_buf_thaw(db->db_buf);
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);
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;
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]);
1267 sa_attr_iter(hdl->sa_os, sa_hdr_phys, DMU_OT_SA,
1268 sa_byteswap_cb, NULL, hdl);
1270 if (buftype == SA_SPILL)
1271 arc_buf_freeze(((dmu_buf_impl_t *)hdl->sa_spill)->db_buf);
1275 sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype)
1277 sa_hdr_phys_t *sa_hdr_phys;
1278 dmu_buf_impl_t *db = SA_GET_DB(hdl, buftype);
1279 dmu_object_type_t bonustype = SA_BONUSTYPE_FROM_DB(db);
1280 sa_os_t *sa = hdl->sa_os->os_sa;
1281 sa_idx_tab_t *idx_tab;
1283 sa_hdr_phys = SA_GET_HDR(hdl, buftype);
1285 mutex_enter(&sa->sa_lock);
1287 /* Do we need to byteswap? */
1289 /* only check if not old znode */
1290 if (IS_SA_BONUSTYPE(bonustype) && sa_hdr_phys->sa_magic != SA_MAGIC &&
1291 sa_hdr_phys->sa_magic != 0) {
1292 if (BSWAP_32(sa_hdr_phys->sa_magic) != SA_MAGIC) {
1293 mutex_exit(&sa->sa_lock);
1294 zfs_dbgmsg("Buffer Header: %x != SA_MAGIC:%x "
1295 "object=%#llx\n", sa_hdr_phys->sa_magic, SA_MAGIC,
1297 return (SET_ERROR(EIO));
1299 sa_byteswap(hdl, buftype);
1302 idx_tab = sa_find_idx_tab(hdl->sa_os, bonustype, sa_hdr_phys);
1304 if (buftype == SA_BONUS)
1305 hdl->sa_bonus_tab = idx_tab;
1307 hdl->sa_spill_tab = idx_tab;
1309 mutex_exit(&sa->sa_lock);
1315 sa_evict_sync(void *dbu)
1317 panic("evicting sa dbuf\n");
1321 sa_idx_tab_rele(objset_t *os, void *arg)
1323 sa_os_t *sa = os->os_sa;
1324 sa_idx_tab_t *idx_tab = arg;
1326 if (idx_tab == NULL)
1329 mutex_enter(&sa->sa_lock);
1330 if (zfs_refcount_remove(&idx_tab->sa_refcount, NULL) == 0) {
1331 list_remove(&idx_tab->sa_layout->lot_idx_tab, idx_tab);
1332 if (idx_tab->sa_variable_lengths)
1333 kmem_free(idx_tab->sa_variable_lengths,
1335 idx_tab->sa_layout->lot_var_sizes);
1336 zfs_refcount_destroy(&idx_tab->sa_refcount);
1337 kmem_free(idx_tab->sa_idx_tab,
1338 sizeof (uint32_t) * sa->sa_num_attrs);
1339 kmem_free(idx_tab, sizeof (sa_idx_tab_t));
1341 mutex_exit(&sa->sa_lock);
1345 sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab)
1347 ASSERTV(sa_os_t *sa = os->os_sa);
1349 ASSERT(MUTEX_HELD(&sa->sa_lock));
1350 (void) zfs_refcount_add(&idx_tab->sa_refcount, NULL);
1354 sa_spill_rele(sa_handle_t *hdl)
1356 mutex_enter(&hdl->sa_lock);
1357 if (hdl->sa_spill) {
1358 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
1359 dmu_buf_rele(hdl->sa_spill, NULL);
1360 hdl->sa_spill = NULL;
1361 hdl->sa_spill_tab = NULL;
1363 mutex_exit(&hdl->sa_lock);
1367 sa_handle_destroy(sa_handle_t *hdl)
1369 dmu_buf_t *db = hdl->sa_bonus;
1371 mutex_enter(&hdl->sa_lock);
1372 (void) dmu_buf_remove_user(db, &hdl->sa_dbu);
1374 if (hdl->sa_bonus_tab)
1375 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
1377 if (hdl->sa_spill_tab)
1378 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
1380 dmu_buf_rele(hdl->sa_bonus, NULL);
1383 dmu_buf_rele((dmu_buf_t *)hdl->sa_spill, NULL);
1384 mutex_exit(&hdl->sa_lock);
1386 kmem_cache_free(sa_cache, hdl);
1390 sa_handle_get_from_db(objset_t *os, dmu_buf_t *db, void *userp,
1391 sa_handle_type_t hdl_type, sa_handle_t **handlepp)
1394 sa_handle_t *handle = NULL;
1396 dmu_object_info_t doi;
1398 dmu_object_info_from_db(db, &doi);
1399 ASSERT(doi.doi_bonus_type == DMU_OT_SA ||
1400 doi.doi_bonus_type == DMU_OT_ZNODE);
1402 /* find handle, if it exists */
1403 /* if one doesn't exist then create a new one, and initialize it */
1405 if (hdl_type == SA_HDL_SHARED)
1406 handle = dmu_buf_get_user(db);
1408 if (handle == NULL) {
1409 sa_handle_t *winner = NULL;
1411 handle = kmem_cache_alloc(sa_cache, KM_SLEEP);
1412 handle->sa_dbu.dbu_evict_func_sync = NULL;
1413 handle->sa_dbu.dbu_evict_func_async = NULL;
1414 handle->sa_userp = userp;
1415 handle->sa_bonus = db;
1417 handle->sa_spill = NULL;
1418 handle->sa_bonus_tab = NULL;
1419 handle->sa_spill_tab = NULL;
1421 error = sa_build_index(handle, SA_BONUS);
1423 if (hdl_type == SA_HDL_SHARED) {
1424 dmu_buf_init_user(&handle->sa_dbu, sa_evict_sync, NULL,
1426 winner = dmu_buf_set_user_ie(db, &handle->sa_dbu);
1429 if (winner != NULL) {
1430 kmem_cache_free(sa_cache, handle);
1440 sa_handle_get(objset_t *objset, uint64_t objid, void *userp,
1441 sa_handle_type_t hdl_type, sa_handle_t **handlepp)
1446 if ((error = dmu_bonus_hold(objset, objid, NULL, &db)))
1449 return (sa_handle_get_from_db(objset, db, userp, hdl_type,
1454 sa_buf_hold(objset_t *objset, uint64_t obj_num, void *tag, dmu_buf_t **db)
1456 return (dmu_bonus_hold(objset, obj_num, tag, db));
1460 sa_buf_rele(dmu_buf_t *db, void *tag)
1462 dmu_buf_rele(db, tag);
1466 sa_lookup_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count)
1469 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1470 return (sa_attr_op(hdl, bulk, count, SA_LOOKUP, NULL));
1474 sa_lookup_locked(sa_handle_t *hdl, sa_attr_type_t attr, void *buf,
1478 sa_bulk_attr_t bulk;
1480 VERIFY3U(buflen, <=, SA_ATTR_MAX_LEN);
1482 bulk.sa_attr = attr;
1484 bulk.sa_length = buflen;
1485 bulk.sa_data_func = NULL;
1488 error = sa_lookup_impl(hdl, &bulk, 1);
1493 sa_lookup(sa_handle_t *hdl, sa_attr_type_t attr, void *buf, uint32_t buflen)
1497 mutex_enter(&hdl->sa_lock);
1498 error = sa_lookup_locked(hdl, attr, buf, buflen);
1499 mutex_exit(&hdl->sa_lock);
1506 sa_lookup_uio(sa_handle_t *hdl, sa_attr_type_t attr, uio_t *uio)
1509 sa_bulk_attr_t bulk;
1511 bulk.sa_data = NULL;
1512 bulk.sa_attr = attr;
1513 bulk.sa_data_func = NULL;
1517 mutex_enter(&hdl->sa_lock);
1518 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) == 0) {
1519 error = uiomove((void *)bulk.sa_addr, MIN(bulk.sa_size,
1520 uio->uio_resid), UIO_READ, uio);
1522 mutex_exit(&hdl->sa_lock);
1527 * For the existed object that is upgraded from old system, its ondisk layout
1528 * has no slot for the project ID attribute. But quota accounting logic needs
1529 * to access related slots by offset directly. So we need to adjust these old
1530 * objects' layout to make the project ID to some unified and fixed offset.
1533 sa_add_projid(sa_handle_t *hdl, dmu_tx_t *tx, uint64_t projid)
1535 znode_t *zp = sa_get_userdata(hdl);
1536 dmu_buf_t *db = sa_get_db(hdl);
1537 zfsvfs_t *zfsvfs = ZTOZSB(zp);
1538 int count = 0, err = 0;
1539 sa_bulk_attr_t *bulk, *attrs;
1540 zfs_acl_locator_cb_t locate = { 0 };
1541 uint64_t uid, gid, mode, rdev, xattr = 0, parent, gen, links;
1542 uint64_t crtime[2], mtime[2], ctime[2], atime[2];
1543 zfs_acl_phys_t znode_acl = { 0 };
1544 char scanstamp[AV_SCANSTAMP_SZ];
1546 if (zp->z_acl_cached == NULL) {
1549 mutex_enter(&zp->z_acl_lock);
1550 err = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE);
1551 mutex_exit(&zp->z_acl_lock);
1552 if (err != 0 && err != ENOENT)
1556 bulk = kmem_zalloc(sizeof (sa_bulk_attr_t) * ZPL_END, KM_SLEEP);
1557 attrs = kmem_zalloc(sizeof (sa_bulk_attr_t) * ZPL_END, KM_SLEEP);
1558 mutex_enter(&hdl->sa_lock);
1559 mutex_enter(&zp->z_lock);
1561 err = sa_lookup_locked(hdl, SA_ZPL_PROJID(zfsvfs), &projid,
1563 if (unlikely(err == 0))
1564 /* Someone has added project ID attr by race. */
1569 /* First do a bulk query of the attributes that aren't cached */
1571 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
1573 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL,
1575 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
1577 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
1579 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL,
1581 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
1583 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
1585 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
1587 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL,
1589 if (S_ISBLK(ZTOI(zp)->i_mode) || S_ISCHR(ZTOI(zp)->i_mode))
1590 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL,
1593 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL,
1595 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL,
1597 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL,
1599 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL,
1601 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL,
1603 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL,
1605 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL,
1607 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_XATTR(zfsvfs), NULL,
1609 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_RDEV(zfsvfs), NULL,
1611 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL,
1613 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL,
1615 SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zfsvfs), NULL,
1618 err = sa_bulk_lookup_locked(hdl, bulk, count);
1622 err = sa_lookup_locked(hdl, SA_ZPL_XATTR(zfsvfs), &xattr, 8);
1623 if (err != 0 && err != ENOENT)
1626 zp->z_projid = projid;
1627 zp->z_pflags |= ZFS_PROJID;
1628 links = ZTOI(zp)->i_nlink;
1632 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8);
1633 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_SIZE(zfsvfs), NULL,
1635 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_GEN(zfsvfs), NULL, &gen, 8);
1636 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_UID(zfsvfs), NULL, &uid, 8);
1637 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_GID(zfsvfs), NULL, &gid, 8);
1638 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8);
1639 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_FLAGS(zfsvfs), NULL,
1641 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_ATIME(zfsvfs), NULL, &atime, 16);
1642 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16);
1643 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16);
1644 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_CRTIME(zfsvfs), NULL,
1646 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_LINKS(zfsvfs), NULL, &links, 8);
1647 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_PROJID(zfsvfs), NULL, &projid, 8);
1649 if (S_ISBLK(ZTOI(zp)->i_mode) || S_ISCHR(ZTOI(zp)->i_mode))
1650 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_RDEV(zfsvfs), NULL,
1653 if (zp->z_acl_cached != NULL) {
1654 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_DACL_COUNT(zfsvfs), NULL,
1655 &zp->z_acl_cached->z_acl_count, 8);
1656 if (zp->z_acl_cached->z_version < ZFS_ACL_VERSION_FUID)
1657 zfs_acl_xform(zp, zp->z_acl_cached, CRED());
1658 locate.cb_aclp = zp->z_acl_cached;
1659 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_DACL_ACES(zfsvfs),
1660 zfs_acl_data_locator, &locate,
1661 zp->z_acl_cached->z_acl_bytes);
1665 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_XATTR(zfsvfs), NULL,
1668 if (zp->z_pflags & ZFS_BONUS_SCANSTAMP) {
1669 bcopy((caddr_t)db->db_data + ZFS_OLD_ZNODE_PHYS_SIZE,
1670 scanstamp, AV_SCANSTAMP_SZ);
1671 SA_ADD_BULK_ATTR(attrs, count, SA_ZPL_SCANSTAMP(zfsvfs), NULL,
1672 scanstamp, AV_SCANSTAMP_SZ);
1673 zp->z_pflags &= ~ZFS_BONUS_SCANSTAMP;
1676 VERIFY(dmu_set_bonustype(db, DMU_OT_SA, tx) == 0);
1677 VERIFY(sa_replace_all_by_template_locked(hdl, attrs, count, tx) == 0);
1678 if (znode_acl.z_acl_extern_obj) {
1679 VERIFY(0 == dmu_object_free(zfsvfs->z_os,
1680 znode_acl.z_acl_extern_obj, tx));
1683 zp->z_is_sa = B_TRUE;
1686 mutex_exit(&zp->z_lock);
1687 mutex_exit(&hdl->sa_lock);
1688 kmem_free(attrs, sizeof (sa_bulk_attr_t) * ZPL_END);
1689 kmem_free(bulk, sizeof (sa_bulk_attr_t) * ZPL_END);
1694 static sa_idx_tab_t *
1695 sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype, sa_hdr_phys_t *hdr)
1697 sa_idx_tab_t *idx_tab;
1698 sa_os_t *sa = os->os_sa;
1699 sa_lot_t *tb, search;
1703 * Deterimine layout number. If SA node and header == 0 then
1704 * force the index table to the dummy "1" empty layout.
1706 * The layout number would only be zero for a newly created file
1707 * that has not added any attributes yet, or with crypto enabled which
1708 * doesn't write any attributes to the bonus buffer.
1711 search.lot_num = SA_LAYOUT_NUM(hdr, bonustype);
1713 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
1715 /* Verify header size is consistent with layout information */
1717 ASSERT((IS_SA_BONUSTYPE(bonustype) &&
1718 SA_HDR_SIZE_MATCH_LAYOUT(hdr, tb)) || !IS_SA_BONUSTYPE(bonustype) ||
1719 (IS_SA_BONUSTYPE(bonustype) && hdr->sa_layout_info == 0));
1722 * See if any of the already existing TOC entries can be reused?
1725 for (idx_tab = list_head(&tb->lot_idx_tab); idx_tab;
1726 idx_tab = list_next(&tb->lot_idx_tab, idx_tab)) {
1727 boolean_t valid_idx = B_TRUE;
1730 if (tb->lot_var_sizes != 0 &&
1731 idx_tab->sa_variable_lengths != NULL) {
1732 for (i = 0; i != tb->lot_var_sizes; i++) {
1733 if (hdr->sa_lengths[i] !=
1734 idx_tab->sa_variable_lengths[i]) {
1735 valid_idx = B_FALSE;
1741 sa_idx_tab_hold(os, idx_tab);
1746 /* No such luck, create a new entry */
1747 idx_tab = kmem_zalloc(sizeof (sa_idx_tab_t), KM_SLEEP);
1748 idx_tab->sa_idx_tab =
1749 kmem_zalloc(sizeof (uint32_t) * sa->sa_num_attrs, KM_SLEEP);
1750 idx_tab->sa_layout = tb;
1751 zfs_refcount_create(&idx_tab->sa_refcount);
1752 if (tb->lot_var_sizes)
1753 idx_tab->sa_variable_lengths = kmem_alloc(sizeof (uint16_t) *
1754 tb->lot_var_sizes, KM_SLEEP);
1756 sa_attr_iter(os, hdr, bonustype, sa_build_idx_tab,
1758 sa_idx_tab_hold(os, idx_tab); /* one hold for consumer */
1759 sa_idx_tab_hold(os, idx_tab); /* one for layout */
1760 list_insert_tail(&tb->lot_idx_tab, idx_tab);
1765 sa_default_locator(void **dataptr, uint32_t *len, uint32_t total_len,
1766 boolean_t start, void *userdata)
1770 *dataptr = userdata;
1775 sa_attr_register_sync(sa_handle_t *hdl, dmu_tx_t *tx)
1777 uint64_t attr_value = 0;
1778 sa_os_t *sa = hdl->sa_os->os_sa;
1779 sa_attr_table_t *tb = sa->sa_attr_table;
1782 mutex_enter(&sa->sa_lock);
1784 if (!sa->sa_need_attr_registration || sa->sa_master_obj == 0) {
1785 mutex_exit(&sa->sa_lock);
1789 if (sa->sa_reg_attr_obj == 0) {
1790 sa->sa_reg_attr_obj = zap_create_link(hdl->sa_os,
1791 DMU_OT_SA_ATTR_REGISTRATION,
1792 sa->sa_master_obj, SA_REGISTRY, tx);
1794 for (i = 0; i != sa->sa_num_attrs; i++) {
1795 if (sa->sa_attr_table[i].sa_registered)
1797 ATTR_ENCODE(attr_value, tb[i].sa_attr, tb[i].sa_length,
1799 VERIFY(0 == zap_update(hdl->sa_os, sa->sa_reg_attr_obj,
1800 tb[i].sa_name, 8, 1, &attr_value, tx));
1801 tb[i].sa_registered = B_TRUE;
1803 sa->sa_need_attr_registration = B_FALSE;
1804 mutex_exit(&sa->sa_lock);
1808 * Replace all attributes with attributes specified in template.
1809 * If dnode had a spill buffer then those attributes will be
1810 * also be replaced, possibly with just an empty spill block
1812 * This interface is intended to only be used for bulk adding of
1813 * attributes for a new file. It will also be used by the ZPL
1814 * when converting and old formatted znode to native SA support.
1817 sa_replace_all_by_template_locked(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
1818 int attr_count, dmu_tx_t *tx)
1820 sa_os_t *sa = hdl->sa_os->os_sa;
1822 if (sa->sa_need_attr_registration)
1823 sa_attr_register_sync(hdl, tx);
1824 return (sa_build_layouts(hdl, attr_desc, attr_count, tx));
1828 sa_replace_all_by_template(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
1829 int attr_count, dmu_tx_t *tx)
1833 mutex_enter(&hdl->sa_lock);
1834 error = sa_replace_all_by_template_locked(hdl, attr_desc,
1836 mutex_exit(&hdl->sa_lock);
1841 * Add/remove a single attribute or replace a variable-sized attribute value
1842 * with a value of a different size, and then rewrite the entire set
1844 * Same-length attribute value replacement (including fixed-length attributes)
1845 * is handled more efficiently by the upper layers.
1848 sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
1849 sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
1850 uint16_t buflen, dmu_tx_t *tx)
1852 sa_os_t *sa = hdl->sa_os->os_sa;
1853 dmu_buf_impl_t *db = (dmu_buf_impl_t *)hdl->sa_bonus;
1855 sa_bulk_attr_t *attr_desc;
1857 int bonus_attr_count = 0;
1858 int bonus_data_size = 0;
1859 int spill_data_size = 0;
1860 int spill_attr_count = 0;
1862 uint16_t length, reg_length;
1863 int i, j, k, length_idx;
1865 sa_idx_tab_t *idx_tab;
1869 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1871 /* First make of copy of the old data */
1875 if (dn->dn_bonuslen != 0) {
1876 bonus_data_size = hdl->sa_bonus->db_size;
1877 old_data[0] = kmem_alloc(bonus_data_size, KM_SLEEP);
1878 bcopy(hdl->sa_bonus->db_data, old_data[0],
1879 hdl->sa_bonus->db_size);
1880 bonus_attr_count = hdl->sa_bonus_tab->sa_layout->lot_attr_count;
1886 /* Bring spill buffer online if it isn't currently */
1888 if ((error = sa_get_spill(hdl)) == 0) {
1889 spill_data_size = hdl->sa_spill->db_size;
1890 old_data[1] = vmem_alloc(spill_data_size, KM_SLEEP);
1891 bcopy(hdl->sa_spill->db_data, old_data[1],
1892 hdl->sa_spill->db_size);
1894 hdl->sa_spill_tab->sa_layout->lot_attr_count;
1895 } else if (error && error != ENOENT) {
1897 kmem_free(old_data[0], bonus_data_size);
1903 /* build descriptor of all attributes */
1905 attr_count = bonus_attr_count + spill_attr_count;
1906 if (action == SA_ADD)
1908 else if (action == SA_REMOVE)
1911 attr_desc = kmem_zalloc(sizeof (sa_bulk_attr_t) * attr_count, KM_SLEEP);
1914 * loop through bonus and spill buffer if it exists, and
1915 * build up new attr_descriptor to reset the attributes
1918 count = bonus_attr_count;
1919 hdr = SA_GET_HDR(hdl, SA_BONUS);
1920 idx_tab = SA_IDX_TAB_GET(hdl, SA_BONUS);
1921 for (; k != 2; k++) {
1923 * Iterate over each attribute in layout. Fetch the
1924 * size of variable-length attributes needing rewrite
1925 * from sa_lengths[].
1927 for (i = 0, length_idx = 0; i != count; i++) {
1928 sa_attr_type_t attr;
1930 attr = idx_tab->sa_layout->lot_attrs[i];
1931 reg_length = SA_REGISTERED_LEN(sa, attr);
1932 if (reg_length == 0) {
1933 length = hdr->sa_lengths[length_idx];
1936 length = reg_length;
1938 if (attr == newattr) {
1940 * There is nothing to do for SA_REMOVE,
1941 * so it is just skipped.
1943 if (action == SA_REMOVE)
1947 * Duplicate attributes are not allowed, so the
1948 * action can not be SA_ADD here.
1950 ASSERT3S(action, ==, SA_REPLACE);
1953 * Only a variable-sized attribute can be
1954 * replaced here, and its size must be changing.
1956 ASSERT3U(reg_length, ==, 0);
1957 ASSERT3U(length, !=, buflen);
1958 SA_ADD_BULK_ATTR(attr_desc, j, attr,
1959 locator, datastart, buflen);
1961 SA_ADD_BULK_ATTR(attr_desc, j, attr,
1963 (TOC_OFF(idx_tab->sa_idx_tab[attr]) +
1964 (uintptr_t)old_data[k]), length);
1967 if (k == 0 && hdl->sa_spill) {
1968 hdr = SA_GET_HDR(hdl, SA_SPILL);
1969 idx_tab = SA_IDX_TAB_GET(hdl, SA_SPILL);
1970 count = spill_attr_count;
1975 if (action == SA_ADD) {
1976 reg_length = SA_REGISTERED_LEN(sa, newattr);
1977 IMPLY(reg_length != 0, reg_length == buflen);
1978 SA_ADD_BULK_ATTR(attr_desc, j, newattr, locator,
1981 ASSERT3U(j, ==, attr_count);
1983 error = sa_build_layouts(hdl, attr_desc, attr_count, tx);
1986 kmem_free(old_data[0], bonus_data_size);
1988 vmem_free(old_data[1], spill_data_size);
1989 kmem_free(attr_desc, sizeof (sa_bulk_attr_t) * attr_count);
1995 sa_bulk_update_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
1999 sa_os_t *sa = hdl->sa_os->os_sa;
2000 dmu_object_type_t bonustype;
2001 dmu_buf_t *saved_spill;
2004 ASSERT(MUTEX_HELD(&hdl->sa_lock));
2006 bonustype = SA_BONUSTYPE_FROM_DB(SA_GET_DB(hdl, SA_BONUS));
2007 saved_spill = hdl->sa_spill;
2009 /* sync out registration table if necessary */
2010 if (sa->sa_need_attr_registration)
2011 sa_attr_register_sync(hdl, tx);
2013 error = sa_attr_op(hdl, bulk, count, SA_UPDATE, tx);
2014 if (error == 0 && !IS_SA_BONUSTYPE(bonustype) && sa->sa_update_cb)
2015 sa->sa_update_cb(hdl, tx);
2018 * If saved_spill is NULL and current sa_spill is not NULL that
2019 * means we increased the refcount of the spill buffer through
2020 * sa_get_spill() or dmu_spill_hold_by_dnode(). Therefore we
2021 * must release the hold before calling dmu_tx_commit() to avoid
2022 * making a copy of this buffer in dbuf_sync_leaf() due to the
2023 * reference count now being greater than 1.
2025 if (!saved_spill && hdl->sa_spill) {
2026 if (hdl->sa_spill_tab) {
2027 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
2028 hdl->sa_spill_tab = NULL;
2031 dmu_buf_rele((dmu_buf_t *)hdl->sa_spill, NULL);
2032 hdl->sa_spill = NULL;
2039 * update or add new attribute
2042 sa_update(sa_handle_t *hdl, sa_attr_type_t type,
2043 void *buf, uint32_t buflen, dmu_tx_t *tx)
2046 sa_bulk_attr_t bulk;
2048 VERIFY3U(buflen, <=, SA_ATTR_MAX_LEN);
2050 bulk.sa_attr = type;
2051 bulk.sa_data_func = NULL;
2052 bulk.sa_length = buflen;
2055 mutex_enter(&hdl->sa_lock);
2056 error = sa_bulk_update_impl(hdl, &bulk, 1, tx);
2057 mutex_exit(&hdl->sa_lock);
2062 * Return size of an attribute
2066 sa_size(sa_handle_t *hdl, sa_attr_type_t attr, int *size)
2068 sa_bulk_attr_t bulk;
2071 bulk.sa_data = NULL;
2072 bulk.sa_attr = attr;
2073 bulk.sa_data_func = NULL;
2076 mutex_enter(&hdl->sa_lock);
2077 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) != 0) {
2078 mutex_exit(&hdl->sa_lock);
2081 *size = bulk.sa_size;
2083 mutex_exit(&hdl->sa_lock);
2088 sa_bulk_lookup_locked(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
2091 ASSERT(MUTEX_HELD(&hdl->sa_lock));
2092 return (sa_lookup_impl(hdl, attrs, count));
2096 sa_bulk_lookup(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
2101 mutex_enter(&hdl->sa_lock);
2102 error = sa_bulk_lookup_locked(hdl, attrs, count);
2103 mutex_exit(&hdl->sa_lock);
2108 sa_bulk_update(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count, dmu_tx_t *tx)
2113 mutex_enter(&hdl->sa_lock);
2114 error = sa_bulk_update_impl(hdl, attrs, count, tx);
2115 mutex_exit(&hdl->sa_lock);
2120 sa_remove(sa_handle_t *hdl, sa_attr_type_t attr, dmu_tx_t *tx)
2124 mutex_enter(&hdl->sa_lock);
2125 error = sa_modify_attrs(hdl, attr, SA_REMOVE, NULL,
2127 mutex_exit(&hdl->sa_lock);
2132 sa_object_info(sa_handle_t *hdl, dmu_object_info_t *doi)
2134 dmu_object_info_from_db((dmu_buf_t *)hdl->sa_bonus, doi);
2138 sa_object_size(sa_handle_t *hdl, uint32_t *blksize, u_longlong_t *nblocks)
2140 dmu_object_size_from_db((dmu_buf_t *)hdl->sa_bonus,
2145 sa_set_userp(sa_handle_t *hdl, void *ptr)
2147 hdl->sa_userp = ptr;
2151 sa_get_db(sa_handle_t *hdl)
2153 return ((dmu_buf_t *)hdl->sa_bonus);
2157 sa_get_userdata(sa_handle_t *hdl)
2159 return (hdl->sa_userp);
2163 sa_register_update_callback_locked(objset_t *os, sa_update_cb_t *func)
2165 ASSERT(MUTEX_HELD(&os->os_sa->sa_lock));
2166 os->os_sa->sa_update_cb = func;
2170 sa_register_update_callback(objset_t *os, sa_update_cb_t *func)
2173 mutex_enter(&os->os_sa->sa_lock);
2174 sa_register_update_callback_locked(os, func);
2175 mutex_exit(&os->os_sa->sa_lock);
2179 sa_handle_object(sa_handle_t *hdl)
2181 return (hdl->sa_bonus->db_object);
2185 sa_enabled(objset_t *os)
2187 return (os->os_sa == NULL);
2191 sa_set_sa_object(objset_t *os, uint64_t sa_object)
2193 sa_os_t *sa = os->os_sa;
2195 if (sa->sa_master_obj)
2198 sa->sa_master_obj = sa_object;
2204 sa_hdrsize(void *arg)
2206 sa_hdr_phys_t *hdr = arg;
2208 return (SA_HDR_SIZE(hdr));
2212 sa_handle_lock(sa_handle_t *hdl)
2215 mutex_enter(&hdl->sa_lock);
2219 sa_handle_unlock(sa_handle_t *hdl)
2222 mutex_exit(&hdl->sa_lock);
2226 EXPORT_SYMBOL(sa_handle_get);
2227 EXPORT_SYMBOL(sa_handle_get_from_db);
2228 EXPORT_SYMBOL(sa_handle_destroy);
2229 EXPORT_SYMBOL(sa_buf_hold);
2230 EXPORT_SYMBOL(sa_buf_rele);
2231 EXPORT_SYMBOL(sa_spill_rele);
2232 EXPORT_SYMBOL(sa_lookup);
2233 EXPORT_SYMBOL(sa_update);
2234 EXPORT_SYMBOL(sa_remove);
2235 EXPORT_SYMBOL(sa_bulk_lookup);
2236 EXPORT_SYMBOL(sa_bulk_lookup_locked);
2237 EXPORT_SYMBOL(sa_bulk_update);
2238 EXPORT_SYMBOL(sa_size);
2239 EXPORT_SYMBOL(sa_object_info);
2240 EXPORT_SYMBOL(sa_object_size);
2241 EXPORT_SYMBOL(sa_get_userdata);
2242 EXPORT_SYMBOL(sa_set_userp);
2243 EXPORT_SYMBOL(sa_get_db);
2244 EXPORT_SYMBOL(sa_handle_object);
2245 EXPORT_SYMBOL(sa_register_update_callback);
2246 EXPORT_SYMBOL(sa_setup);
2247 EXPORT_SYMBOL(sa_replace_all_by_template);
2248 EXPORT_SYMBOL(sa_replace_all_by_template_locked);
2249 EXPORT_SYMBOL(sa_enabled);
2250 EXPORT_SYMBOL(sa_cache_init);
2251 EXPORT_SYMBOL(sa_cache_fini);
2252 EXPORT_SYMBOL(sa_set_sa_object);
2253 EXPORT_SYMBOL(sa_hdrsize);
2254 EXPORT_SYMBOL(sa_handle_lock);
2255 EXPORT_SYMBOL(sa_handle_unlock);
2256 EXPORT_SYMBOL(sa_lookup_uio);
2257 EXPORT_SYMBOL(sa_add_projid);
2258 #endif /* _KERNEL */