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 * Portions Copyright 2011 iXsystems, Inc
25 * Copyright (c) 2012 by Delphix. All rights reserved.
28 #include <sys/zfs_context.h>
29 #include <sys/types.h>
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/sysmacros.h>
34 #include <sys/dmu_impl.h>
35 #include <sys/dmu_objset.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 * ZFS System attributes:
49 * A generic mechanism to allow for arbitrary attributes
50 * to be stored in a dnode. The data will be stored in the bonus buffer of
51 * the dnode and if necessary a special "spill" block will be used to handle
52 * overflow situations. The spill block will be sized to fit the data
53 * from 512 - 128K. When a spill block is used the BP (blkptr_t) for the
54 * spill block is stored at the end of the current bonus buffer. Any
55 * attributes that would be in the way of the blkptr_t will be relocated
56 * into the spill block.
58 * Attribute registration:
60 * Stored persistently on a per dataset basis
61 * a mapping between attribute "string" names and their actual attribute
62 * numeric values, length, and byteswap function. The names are only used
63 * during registration. All attributes are known by their unique attribute
64 * id value. If an attribute can have a variable size then the value
65 * 0 will be used to indicate this.
69 * Attribute layouts are a way to compactly store multiple attributes, but
70 * without taking the overhead associated with managing each attribute
71 * individually. Since you will typically have the same set of attributes
72 * stored in the same order a single table will be used to represent that
73 * layout. The ZPL for example will usually have only about 10 different
74 * layouts (regular files, device files, symlinks,
75 * regular files + scanstamp, files/dir with extended attributes, and then
76 * you have the possibility of all of those minus ACL, because it would
77 * be kicked out into the spill block)
79 * Layouts are simply an array of the attributes and their
80 * ordering i.e. [0, 1, 4, 5, 2]
82 * Each distinct layout is given a unique layout number and that is whats
83 * stored in the header at the beginning of the SA data buffer.
85 * A layout only covers a single dbuf (bonus or spill). If a set of
86 * attributes is split up between the bonus buffer and a spill buffer then
87 * two different layouts will be used. This allows us to byteswap the
88 * spill without looking at the bonus buffer and keeps the on disk format of
89 * the bonus and spill buffer the same.
91 * Adding a single attribute will cause the entire set of attributes to
92 * be rewritten and could result in a new layout number being constructed
93 * as part of the rewrite if no such layout exists for the new set of
94 * attribues. The new attribute will be appended to the end of the already
95 * existing attributes.
97 * Both the attribute registration and attribute layout information are
98 * stored in normal ZAP attributes. Their should be a small number of
99 * known layouts and the set of attributes is assumed to typically be quite
102 * The registered attributes and layout "table" information is maintained
103 * in core and a special "sa_os_t" is attached to the objset_t.
105 * A special interface is provided to allow for quickly applying
106 * a large set of attributes at once. sa_replace_all_by_template() is
107 * used to set an array of attributes. This is used by the ZPL when
108 * creating a brand new file. The template that is passed into the function
109 * specifies the attribute, size for variable length attributes, location of
110 * data and special "data locator" function if the data isn't in a contiguous
113 * Byteswap implications:
114 * Since the SA attributes are not entirely self describing we can't do
115 * the normal byteswap processing. The special ZAP layout attribute and
116 * attribute registration attributes define the byteswap function and the
117 * size of the attributes, unless it is variable sized.
118 * The normal ZFS byteswapping infrastructure assumes you don't need
119 * to read any objects in order to do the necessary byteswapping. Whereas
120 * SA attributes can only be properly byteswapped if the dataset is opened
121 * and the layout/attribute ZAP attributes are available. Because of this
122 * the SA attributes will be byteswapped when they are first accessed by
123 * the SA code that will read the SA data.
126 typedef void (sa_iterfunc_t)(void *hdr, void *addr, sa_attr_type_t,
127 uint16_t length, int length_idx, boolean_t, void *userp);
129 static int sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype);
130 static void sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab);
131 static void *sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype,
133 static void sa_idx_tab_rele(objset_t *os, void *arg);
134 static void sa_copy_data(sa_data_locator_t *func, void *start, void *target,
136 static int sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
137 sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
138 uint16_t buflen, dmu_tx_t *tx);
140 arc_byteswap_func_t *sa_bswap_table[] = {
141 byteswap_uint64_array,
142 byteswap_uint32_array,
143 byteswap_uint16_array,
144 byteswap_uint8_array,
148 #define SA_COPY_DATA(f, s, t, l) \
152 *(uint64_t *)t = *(uint64_t *)s; \
153 } else if (l == 16) { \
154 *(uint64_t *)t = *(uint64_t *)s; \
155 *(uint64_t *)((uintptr_t)t + 8) = \
156 *(uint64_t *)((uintptr_t)s + 8); \
161 sa_copy_data(f, s, t, l); \
165 * This table is fixed and cannot be changed. Its purpose is to
166 * allow the SA code to work with both old/new ZPL file systems.
167 * It contains the list of legacy attributes. These attributes aren't
168 * stored in the "attribute" registry zap objects, since older ZPL file systems
169 * won't have the registry. Only objsets of type ZFS_TYPE_FILESYSTEM will
170 * use this static table.
172 sa_attr_reg_t sa_legacy_attrs[] = {
173 {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0},
174 {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1},
175 {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2},
176 {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3},
177 {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4},
178 {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5},
179 {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6},
180 {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7},
181 {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8},
182 {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9},
183 {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10},
184 {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11},
185 {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12},
186 {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13},
187 {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14},
188 {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15},
193 * This is only used for objects of type DMU_OT_ZNODE
195 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
200 * Special dummy layout used for buffers with no attributes.
203 sa_attr_type_t sa_dummy_zpl_layout[] = { 0 };
205 static int sa_legacy_attr_count = 16;
206 static kmem_cache_t *sa_cache = NULL;
210 sa_cache_constructor(void *buf, void *unused, int kmflag)
212 sa_handle_t *hdl = buf;
214 hdl->sa_bonus_tab = NULL;
215 hdl->sa_spill_tab = NULL;
217 hdl->sa_userp = NULL;
218 hdl->sa_bonus = NULL;
219 hdl->sa_spill = NULL;
220 mutex_init(&hdl->sa_lock, NULL, MUTEX_DEFAULT, NULL);
226 sa_cache_destructor(void *buf, void *unused)
228 sa_handle_t *hdl = buf;
229 mutex_destroy(&hdl->sa_lock);
235 sa_cache = kmem_cache_create("sa_cache",
236 sizeof (sa_handle_t), 0, sa_cache_constructor,
237 sa_cache_destructor, NULL, NULL, NULL, 0);
244 kmem_cache_destroy(sa_cache);
248 layout_num_compare(const void *arg1, const void *arg2)
250 const sa_lot_t *node1 = arg1;
251 const sa_lot_t *node2 = arg2;
253 if (node1->lot_num > node2->lot_num)
255 else if (node1->lot_num < node2->lot_num)
261 layout_hash_compare(const void *arg1, const void *arg2)
263 const sa_lot_t *node1 = arg1;
264 const sa_lot_t *node2 = arg2;
266 if (node1->lot_hash > node2->lot_hash)
268 if (node1->lot_hash < node2->lot_hash)
270 if (node1->lot_instance > node2->lot_instance)
272 if (node1->lot_instance < node2->lot_instance)
278 sa_layout_equal(sa_lot_t *tbf, sa_attr_type_t *attrs, int count)
282 if (count != tbf->lot_attr_count)
285 for (i = 0; i != count; i++) {
286 if (attrs[i] != tbf->lot_attrs[i])
292 #define SA_ATTR_HASH(attr) (zfs_crc64_table[(-1ULL ^ attr) & 0xFF])
295 sa_layout_info_hash(sa_attr_type_t *attrs, int attr_count)
298 uint64_t crc = -1ULL;
300 for (i = 0; i != attr_count; i++)
301 crc ^= SA_ATTR_HASH(attrs[i]);
307 sa_get_spill(sa_handle_t *hdl)
310 if (hdl->sa_spill == NULL) {
311 if ((rc = dmu_spill_hold_existing(hdl->sa_bonus, NULL,
312 &hdl->sa_spill)) == 0)
313 VERIFY(0 == sa_build_index(hdl, SA_SPILL));
322 * Main attribute lookup/update function
323 * returns 0 for success or non zero for failures
325 * Operates on bulk array, first failure will abort further processing
328 sa_attr_op(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
329 sa_data_op_t data_op, dmu_tx_t *tx)
331 sa_os_t *sa = hdl->sa_os->os_sa;
334 sa_buf_type_t buftypes;
339 for (i = 0; i != count; i++) {
340 ASSERT(bulk[i].sa_attr <= hdl->sa_os->os_sa->sa_num_attrs);
342 bulk[i].sa_addr = NULL;
343 /* First check the bonus buffer */
345 if (hdl->sa_bonus_tab && TOC_ATTR_PRESENT(
346 hdl->sa_bonus_tab->sa_idx_tab[bulk[i].sa_attr])) {
347 SA_ATTR_INFO(sa, hdl->sa_bonus_tab,
348 SA_GET_HDR(hdl, SA_BONUS),
349 bulk[i].sa_attr, bulk[i], SA_BONUS, hdl);
350 if (tx && !(buftypes & SA_BONUS)) {
351 dmu_buf_will_dirty(hdl->sa_bonus, tx);
352 buftypes |= SA_BONUS;
355 if (bulk[i].sa_addr == NULL &&
356 ((error = sa_get_spill(hdl)) == 0)) {
357 if (TOC_ATTR_PRESENT(
358 hdl->sa_spill_tab->sa_idx_tab[bulk[i].sa_attr])) {
359 SA_ATTR_INFO(sa, hdl->sa_spill_tab,
360 SA_GET_HDR(hdl, SA_SPILL),
361 bulk[i].sa_attr, bulk[i], SA_SPILL, hdl);
362 if (tx && !(buftypes & SA_SPILL) &&
363 bulk[i].sa_size == bulk[i].sa_length) {
364 dmu_buf_will_dirty(hdl->sa_spill, tx);
365 buftypes |= SA_SPILL;
369 if (error && error != ENOENT) {
370 return ((error == ECKSUM) ? EIO : error);
375 if (bulk[i].sa_addr == NULL)
377 if (bulk[i].sa_data) {
378 SA_COPY_DATA(bulk[i].sa_data_func,
379 bulk[i].sa_addr, bulk[i].sa_data,
385 /* existing rewrite of attr */
386 if (bulk[i].sa_addr &&
387 bulk[i].sa_size == bulk[i].sa_length) {
388 SA_COPY_DATA(bulk[i].sa_data_func,
389 bulk[i].sa_data, bulk[i].sa_addr,
392 } else if (bulk[i].sa_addr) { /* attr size change */
393 error = sa_modify_attrs(hdl, bulk[i].sa_attr,
394 SA_REPLACE, bulk[i].sa_data_func,
395 bulk[i].sa_data, bulk[i].sa_length, tx);
396 } else { /* adding new attribute */
397 error = sa_modify_attrs(hdl, bulk[i].sa_attr,
398 SA_ADD, bulk[i].sa_data_func,
399 bulk[i].sa_data, bulk[i].sa_length, tx);
410 sa_add_layout_entry(objset_t *os, sa_attr_type_t *attrs, int attr_count,
411 uint64_t lot_num, uint64_t hash, boolean_t zapadd, dmu_tx_t *tx)
413 sa_os_t *sa = os->os_sa;
414 sa_lot_t *tb, *findtb;
418 ASSERT(MUTEX_HELD(&sa->sa_lock));
419 tb = kmem_zalloc(sizeof (sa_lot_t), KM_SLEEP);
420 tb->lot_attr_count = attr_count;
421 tb->lot_attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
423 bcopy(attrs, tb->lot_attrs, sizeof (sa_attr_type_t) * attr_count);
424 tb->lot_num = lot_num;
426 tb->lot_instance = 0;
431 if (sa->sa_layout_attr_obj == 0) {
432 sa->sa_layout_attr_obj = zap_create_link(os,
433 DMU_OT_SA_ATTR_LAYOUTS,
434 sa->sa_master_obj, SA_LAYOUTS, tx);
437 (void) snprintf(attr_name, sizeof (attr_name),
439 VERIFY(0 == zap_update(os, os->os_sa->sa_layout_attr_obj,
440 attr_name, 2, attr_count, attrs, tx));
443 list_create(&tb->lot_idx_tab, sizeof (sa_idx_tab_t),
444 offsetof(sa_idx_tab_t, sa_next));
446 for (i = 0; i != attr_count; i++) {
447 if (sa->sa_attr_table[tb->lot_attrs[i]].sa_length == 0)
451 avl_add(&sa->sa_layout_num_tree, tb);
453 /* verify we don't have a hash collision */
454 if ((findtb = avl_find(&sa->sa_layout_hash_tree, tb, &loc)) != NULL) {
455 for (; findtb && findtb->lot_hash == hash;
456 findtb = AVL_NEXT(&sa->sa_layout_hash_tree, findtb)) {
457 if (findtb->lot_instance != tb->lot_instance)
462 avl_add(&sa->sa_layout_hash_tree, tb);
467 sa_find_layout(objset_t *os, uint64_t hash, sa_attr_type_t *attrs,
468 int count, dmu_tx_t *tx, sa_lot_t **lot)
470 sa_lot_t *tb, tbsearch;
472 sa_os_t *sa = os->os_sa;
473 boolean_t found = B_FALSE;
475 mutex_enter(&sa->sa_lock);
476 tbsearch.lot_hash = hash;
477 tbsearch.lot_instance = 0;
478 tb = avl_find(&sa->sa_layout_hash_tree, &tbsearch, &loc);
480 for (; tb && tb->lot_hash == hash;
481 tb = AVL_NEXT(&sa->sa_layout_hash_tree, tb)) {
482 if (sa_layout_equal(tb, attrs, count) == 0) {
489 tb = sa_add_layout_entry(os, attrs, count,
490 avl_numnodes(&sa->sa_layout_num_tree), hash, B_TRUE, tx);
492 mutex_exit(&sa->sa_lock);
497 sa_resize_spill(sa_handle_t *hdl, uint32_t size, dmu_tx_t *tx)
503 blocksize = SPA_MINBLOCKSIZE;
504 } else if (size > SPA_MAXBLOCKSIZE) {
508 blocksize = P2ROUNDUP_TYPED(size, SPA_MINBLOCKSIZE, uint32_t);
511 error = dbuf_spill_set_blksz(hdl->sa_spill, blocksize, tx);
517 sa_copy_data(sa_data_locator_t *func, void *datastart, void *target, int buflen)
520 bcopy(datastart, target, buflen);
525 void *saptr = target;
530 while (bytes < buflen) {
531 func(&dataptr, &length, buflen, start, datastart);
532 bcopy(dataptr, saptr, length);
533 saptr = (void *)((caddr_t)saptr + length);
541 * Determine several different sizes
542 * first the sa header size
543 * the number of bytes to be stored
544 * if spill would occur the index in the attribute array is returned
546 * the boolean will_spill will be set when spilling is necessary. It
547 * is only set when the buftype is SA_BONUS
550 sa_find_sizes(sa_os_t *sa, sa_bulk_attr_t *attr_desc, int attr_count,
551 dmu_buf_t *db, sa_buf_type_t buftype, int *index, int *total,
552 boolean_t *will_spill)
558 boolean_t done = B_FALSE;
560 if (buftype == SA_BONUS && sa->sa_force_spill) {
563 *will_spill = B_TRUE;
570 if (buftype == SA_BONUS)
571 *will_spill = B_FALSE;
573 hdrsize = (SA_BONUSTYPE_FROM_DB(db) == DMU_OT_ZNODE) ? 0 :
574 sizeof (sa_hdr_phys_t);
576 full_space = (buftype == SA_BONUS) ? DN_MAX_BONUSLEN : db->db_size;
578 for (i = 0; i != attr_count; i++) {
581 *total += P2ROUNDUP(attr_desc[i].sa_length, 8);
585 is_var_sz = (SA_REGISTERED_LEN(sa, attr_desc[i].sa_attr) == 0);
590 if (is_var_sz && var_size > 1) {
591 if (P2ROUNDUP(hdrsize + sizeof (uint16_t), 8) +
592 *total < full_space) {
593 hdrsize += sizeof (uint16_t);
597 if (buftype == SA_BONUS)
598 *will_spill = B_TRUE;
604 * find index of where spill *could* occur.
605 * Then continue to count of remainder attribute
606 * space. The sum is used later for sizing bonus
609 if (buftype == SA_BONUS && *index == -1 &&
610 (*total + P2ROUNDUP(hdrsize, 8)) >
611 (full_space - sizeof (blkptr_t))) {
617 if ((*total + P2ROUNDUP(hdrsize, 8)) > full_space &&
619 *will_spill = B_TRUE;
622 hdrsize = P2ROUNDUP(hdrsize, 8);
626 #define BUF_SPACE_NEEDED(total, header) (total + header)
629 * Find layout that corresponds to ordering of attributes
630 * If not found a new layout number is created and added to
631 * persistent layout tables.
634 sa_build_layouts(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, int attr_count,
637 sa_os_t *sa = hdl->sa_os->os_sa;
639 sa_buf_type_t buftype;
640 sa_hdr_phys_t *sahdr;
643 sa_attr_type_t *attrs, *attrs_start;
645 int hdrsize, spillhdrsize;
647 dmu_object_type_t bonustype;
653 dmu_buf_will_dirty(hdl->sa_bonus, tx);
654 bonustype = SA_BONUSTYPE_FROM_DB(hdl->sa_bonus);
656 /* first determine bonus header size and sum of all attributes */
657 hdrsize = sa_find_sizes(sa, attr_desc, attr_count, hdl->sa_bonus,
658 SA_BONUS, &i, &used, &spilling);
660 if (used > SPA_MAXBLOCKSIZE)
663 VERIFY(0 == dmu_set_bonus(hdl->sa_bonus, spilling ?
664 MIN(DN_MAX_BONUSLEN - sizeof (blkptr_t), used + hdrsize) :
665 used + hdrsize, tx));
667 ASSERT((bonustype == DMU_OT_ZNODE && spilling == 0) ||
668 bonustype == DMU_OT_SA);
670 /* setup and size spill buffer when needed */
674 if (hdl->sa_spill == NULL) {
675 VERIFY(dmu_spill_hold_by_bonus(hdl->sa_bonus, NULL,
676 &hdl->sa_spill) == 0);
678 dmu_buf_will_dirty(hdl->sa_spill, tx);
680 spillhdrsize = sa_find_sizes(sa, &attr_desc[i],
681 attr_count - i, hdl->sa_spill, SA_SPILL, &i,
682 &spill_used, &dummy);
684 if (spill_used > SPA_MAXBLOCKSIZE)
687 buf_space = hdl->sa_spill->db_size - spillhdrsize;
688 if (BUF_SPACE_NEEDED(spill_used, spillhdrsize) >
689 hdl->sa_spill->db_size)
690 VERIFY(0 == sa_resize_spill(hdl,
691 BUF_SPACE_NEEDED(spill_used, spillhdrsize), tx));
694 /* setup starting pointers to lay down data */
695 data_start = (void *)((uintptr_t)hdl->sa_bonus->db_data + hdrsize);
696 sahdr = (sa_hdr_phys_t *)hdl->sa_bonus->db_data;
700 buf_space = (sa->sa_force_spill) ?
701 0 : SA_BLKPTR_SPACE - hdrsize;
703 buf_space = hdl->sa_bonus->db_size - hdrsize;
705 attrs_start = attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count,
709 for (i = 0, len_idx = 0, hash = -1ULL; i != attr_count; i++) {
712 attrs[i] = attr_desc[i].sa_attr;
713 length = SA_REGISTERED_LEN(sa, attrs[i]);
715 length = attr_desc[i].sa_length;
717 VERIFY(length == attr_desc[i].sa_length);
719 if (buf_space < length) { /* switch to spill buffer */
720 VERIFY(bonustype == DMU_OT_SA);
721 if (buftype == SA_BONUS && !sa->sa_force_spill) {
722 sa_find_layout(hdl->sa_os, hash, attrs_start,
723 lot_count, tx, &lot);
724 SA_SET_HDR(sahdr, lot->lot_num, hdrsize);
731 sahdr = (sa_hdr_phys_t *)hdl->sa_spill->db_data;
732 sahdr->sa_magic = SA_MAGIC;
733 data_start = (void *)((uintptr_t)sahdr +
735 attrs_start = &attrs[i];
736 buf_space = hdl->sa_spill->db_size - spillhdrsize;
739 hash ^= SA_ATTR_HASH(attrs[i]);
740 attr_desc[i].sa_addr = data_start;
741 attr_desc[i].sa_size = length;
742 SA_COPY_DATA(attr_desc[i].sa_data_func, attr_desc[i].sa_data,
744 if (sa->sa_attr_table[attrs[i]].sa_length == 0) {
745 sahdr->sa_lengths[len_idx++] = length;
747 VERIFY((uintptr_t)data_start % 8 == 0);
748 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
750 buf_space -= P2ROUNDUP(length, 8);
754 sa_find_layout(hdl->sa_os, hash, attrs_start, lot_count, tx, &lot);
757 * Verify that old znodes always have layout number 0.
758 * Must be DMU_OT_SA for arbitrary layouts
760 VERIFY((bonustype == DMU_OT_ZNODE && lot->lot_num == 0) ||
761 (bonustype == DMU_OT_SA && lot->lot_num > 1));
763 if (bonustype == DMU_OT_SA) {
764 SA_SET_HDR(sahdr, lot->lot_num,
765 buftype == SA_BONUS ? hdrsize : spillhdrsize);
768 kmem_free(attrs, sizeof (sa_attr_type_t) * attr_count);
769 if (hdl->sa_bonus_tab) {
770 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
771 hdl->sa_bonus_tab = NULL;
773 if (!sa->sa_force_spill)
774 VERIFY(0 == sa_build_index(hdl, SA_BONUS));
776 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
779 * remove spill block that is no longer needed.
781 dmu_buf_rele(hdl->sa_spill, NULL);
782 hdl->sa_spill = NULL;
783 hdl->sa_spill_tab = NULL;
784 VERIFY(0 == dmu_rm_spill(hdl->sa_os,
785 sa_handle_object(hdl), tx));
787 VERIFY(0 == sa_build_index(hdl, SA_SPILL));
795 sa_free_attr_table(sa_os_t *sa)
799 if (sa->sa_attr_table == NULL)
802 for (i = 0; i != sa->sa_num_attrs; i++) {
803 if (sa->sa_attr_table[i].sa_name)
804 kmem_free(sa->sa_attr_table[i].sa_name,
805 strlen(sa->sa_attr_table[i].sa_name) + 1);
808 kmem_free(sa->sa_attr_table,
809 sizeof (sa_attr_table_t) * sa->sa_num_attrs);
811 sa->sa_attr_table = NULL;
815 sa_attr_table_setup(objset_t *os, sa_attr_reg_t *reg_attrs, int count)
817 sa_os_t *sa = os->os_sa;
818 uint64_t sa_attr_count = 0;
819 uint64_t sa_reg_count;
825 int registered_count = 0;
827 dmu_objset_type_t ostype = dmu_objset_type(os);
830 kmem_zalloc(count * sizeof (sa_attr_type_t), KM_SLEEP);
831 sa->sa_user_table_sz = count * sizeof (sa_attr_type_t);
833 if (sa->sa_reg_attr_obj != 0) {
834 error = zap_count(os, sa->sa_reg_attr_obj,
838 * Make sure we retrieved a count and that it isn't zero
840 if (error || (error == 0 && sa_attr_count == 0)) {
845 sa_reg_count = sa_attr_count;
848 if (ostype == DMU_OST_ZFS && sa_attr_count == 0)
849 sa_attr_count += sa_legacy_attr_count;
851 /* Allocate attribute numbers for attributes that aren't registered */
852 for (i = 0; i != count; i++) {
853 boolean_t found = B_FALSE;
856 if (ostype == DMU_OST_ZFS) {
857 for (j = 0; j != sa_legacy_attr_count; j++) {
858 if (strcmp(reg_attrs[i].sa_name,
859 sa_legacy_attrs[j].sa_name) == 0) {
860 sa->sa_user_table[i] =
861 sa_legacy_attrs[j].sa_attr;
869 if (sa->sa_reg_attr_obj)
870 error = zap_lookup(os, sa->sa_reg_attr_obj,
871 reg_attrs[i].sa_name, 8, 1, &attr_value);
876 sa->sa_user_table[i] = (sa_attr_type_t)sa_attr_count;
880 sa->sa_user_table[i] = ATTR_NUM(attr_value);
887 sa->sa_num_attrs = sa_attr_count;
888 tb = sa->sa_attr_table =
889 kmem_zalloc(sizeof (sa_attr_table_t) * sa_attr_count, KM_SLEEP);
892 * Attribute table is constructed from requested attribute list,
893 * previously foreign registered attributes, and also the legacy
894 * ZPL set of attributes.
897 if (sa->sa_reg_attr_obj) {
898 for (zap_cursor_init(&zc, os, sa->sa_reg_attr_obj);
899 (error = zap_cursor_retrieve(&zc, &za)) == 0;
900 zap_cursor_advance(&zc)) {
902 value = za.za_first_integer;
905 tb[ATTR_NUM(value)].sa_attr = ATTR_NUM(value);
906 tb[ATTR_NUM(value)].sa_length = ATTR_LENGTH(value);
907 tb[ATTR_NUM(value)].sa_byteswap = ATTR_BSWAP(value);
908 tb[ATTR_NUM(value)].sa_registered = B_TRUE;
910 if (tb[ATTR_NUM(value)].sa_name) {
913 tb[ATTR_NUM(value)].sa_name =
914 kmem_zalloc(strlen(za.za_name) +1, KM_SLEEP);
915 (void) strlcpy(tb[ATTR_NUM(value)].sa_name, za.za_name,
916 strlen(za.za_name) +1);
918 zap_cursor_fini(&zc);
920 * Make sure we processed the correct number of registered
923 if (registered_count != sa_reg_count) {
930 if (ostype == DMU_OST_ZFS) {
931 for (i = 0; i != sa_legacy_attr_count; i++) {
934 tb[i].sa_attr = sa_legacy_attrs[i].sa_attr;
935 tb[i].sa_length = sa_legacy_attrs[i].sa_length;
936 tb[i].sa_byteswap = sa_legacy_attrs[i].sa_byteswap;
937 tb[i].sa_registered = B_FALSE;
939 kmem_zalloc(strlen(sa_legacy_attrs[i].sa_name) +1,
941 (void) strlcpy(tb[i].sa_name,
942 sa_legacy_attrs[i].sa_name,
943 strlen(sa_legacy_attrs[i].sa_name) + 1);
947 for (i = 0; i != count; i++) {
948 sa_attr_type_t attr_id;
950 attr_id = sa->sa_user_table[i];
951 if (tb[attr_id].sa_name)
954 tb[attr_id].sa_length = reg_attrs[i].sa_length;
955 tb[attr_id].sa_byteswap = reg_attrs[i].sa_byteswap;
956 tb[attr_id].sa_attr = attr_id;
957 tb[attr_id].sa_name =
958 kmem_zalloc(strlen(reg_attrs[i].sa_name) + 1, KM_SLEEP);
959 (void) strlcpy(tb[attr_id].sa_name, reg_attrs[i].sa_name,
960 strlen(reg_attrs[i].sa_name) + 1);
963 sa->sa_need_attr_registration =
964 (sa_attr_count != registered_count);
968 kmem_free(sa->sa_user_table, count * sizeof (sa_attr_type_t));
969 sa->sa_user_table = NULL;
970 sa_free_attr_table(sa);
971 return ((error != 0) ? error : EINVAL);
975 sa_setup(objset_t *os, uint64_t sa_obj, sa_attr_reg_t *reg_attrs, int count,
976 sa_attr_type_t **user_table)
981 dmu_objset_type_t ostype = dmu_objset_type(os);
985 mutex_enter(&os->os_lock);
987 mutex_enter(&os->os_sa->sa_lock);
988 mutex_exit(&os->os_lock);
989 tb = os->os_sa->sa_user_table;
990 mutex_exit(&os->os_sa->sa_lock);
995 sa = kmem_zalloc(sizeof (sa_os_t), KM_SLEEP);
996 mutex_init(&sa->sa_lock, NULL, MUTEX_DEFAULT, NULL);
997 sa->sa_master_obj = sa_obj;
1000 mutex_enter(&sa->sa_lock);
1001 mutex_exit(&os->os_lock);
1002 avl_create(&sa->sa_layout_num_tree, layout_num_compare,
1003 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_num_node));
1004 avl_create(&sa->sa_layout_hash_tree, layout_hash_compare,
1005 sizeof (sa_lot_t), offsetof(sa_lot_t, lot_hash_node));
1008 error = zap_lookup(os, sa_obj, SA_LAYOUTS,
1009 8, 1, &sa->sa_layout_attr_obj);
1010 if (error != 0 && error != ENOENT)
1012 error = zap_lookup(os, sa_obj, SA_REGISTRY,
1013 8, 1, &sa->sa_reg_attr_obj);
1014 if (error != 0 && error != ENOENT)
1018 if ((error = sa_attr_table_setup(os, reg_attrs, count)) != 0)
1021 if (sa->sa_layout_attr_obj != 0) {
1022 uint64_t layout_count;
1024 error = zap_count(os, sa->sa_layout_attr_obj,
1028 * Layout number count should be > 0
1030 if (error || (error == 0 && layout_count == 0)) {
1036 for (zap_cursor_init(&zc, os, sa->sa_layout_attr_obj);
1037 (error = zap_cursor_retrieve(&zc, &za)) == 0;
1038 zap_cursor_advance(&zc)) {
1039 sa_attr_type_t *lot_attrs;
1042 lot_attrs = kmem_zalloc(sizeof (sa_attr_type_t) *
1043 za.za_num_integers, KM_SLEEP);
1045 if ((error = (zap_lookup(os, sa->sa_layout_attr_obj,
1046 za.za_name, 2, za.za_num_integers,
1047 lot_attrs))) != 0) {
1048 kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
1049 za.za_num_integers);
1052 VERIFY(ddi_strtoull(za.za_name, NULL, 10,
1053 (unsigned long long *)&lot_num) == 0);
1055 (void) sa_add_layout_entry(os, lot_attrs,
1056 za.za_num_integers, lot_num,
1057 sa_layout_info_hash(lot_attrs,
1058 za.za_num_integers), B_FALSE, NULL);
1059 kmem_free(lot_attrs, sizeof (sa_attr_type_t) *
1060 za.za_num_integers);
1062 zap_cursor_fini(&zc);
1065 * Make sure layout count matches number of entries added
1068 if (avl_numnodes(&sa->sa_layout_num_tree) != layout_count) {
1074 /* Add special layout number for old ZNODES */
1075 if (ostype == DMU_OST_ZFS) {
1076 (void) sa_add_layout_entry(os, sa_legacy_zpl_layout,
1077 sa_legacy_attr_count, 0,
1078 sa_layout_info_hash(sa_legacy_zpl_layout,
1079 sa_legacy_attr_count), B_FALSE, NULL);
1081 (void) sa_add_layout_entry(os, sa_dummy_zpl_layout, 0, 1,
1084 *user_table = os->os_sa->sa_user_table;
1085 mutex_exit(&sa->sa_lock);
1089 sa_free_attr_table(sa);
1090 if (sa->sa_user_table)
1091 kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
1092 mutex_exit(&sa->sa_lock);
1093 kmem_free(sa, sizeof (sa_os_t));
1094 return ((error == ECKSUM) ? EIO : error);
1098 sa_tear_down(objset_t *os)
1100 sa_os_t *sa = os->os_sa;
1104 kmem_free(sa->sa_user_table, sa->sa_user_table_sz);
1106 /* Free up attr table */
1108 sa_free_attr_table(sa);
1111 while (layout = avl_destroy_nodes(&sa->sa_layout_hash_tree, &cookie)) {
1113 while (tab = list_head(&layout->lot_idx_tab)) {
1114 ASSERT(refcount_count(&tab->sa_refcount));
1115 sa_idx_tab_rele(os, tab);
1120 while (layout = avl_destroy_nodes(&sa->sa_layout_num_tree, &cookie)) {
1121 kmem_free(layout->lot_attrs,
1122 sizeof (sa_attr_type_t) * layout->lot_attr_count);
1123 kmem_free(layout, sizeof (sa_lot_t));
1126 avl_destroy(&sa->sa_layout_hash_tree);
1127 avl_destroy(&sa->sa_layout_num_tree);
1129 kmem_free(sa, sizeof (sa_os_t));
1134 sa_build_idx_tab(void *hdr, void *attr_addr, sa_attr_type_t attr,
1135 uint16_t length, int length_idx, boolean_t var_length, void *userp)
1137 sa_idx_tab_t *idx_tab = userp;
1140 ASSERT(idx_tab->sa_variable_lengths);
1141 idx_tab->sa_variable_lengths[length_idx] = length;
1143 TOC_ATTR_ENCODE(idx_tab->sa_idx_tab[attr], length_idx,
1144 (uint32_t)((uintptr_t)attr_addr - (uintptr_t)hdr));
1148 sa_attr_iter(objset_t *os, sa_hdr_phys_t *hdr, dmu_object_type_t type,
1149 sa_iterfunc_t func, sa_lot_t *tab, void *userp)
1155 sa_os_t *sa = os->os_sa;
1157 uint16_t *length_start = NULL;
1158 uint8_t length_idx = 0;
1161 search.lot_num = SA_LAYOUT_NUM(hdr, type);
1162 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
1166 if (IS_SA_BONUSTYPE(type)) {
1167 data_start = (void *)P2ROUNDUP(((uintptr_t)hdr +
1168 offsetof(sa_hdr_phys_t, sa_lengths) +
1169 (sizeof (uint16_t) * tb->lot_var_sizes)), 8);
1170 length_start = hdr->sa_lengths;
1175 for (i = 0; i != tb->lot_attr_count; i++) {
1176 int attr_length, reg_length;
1179 reg_length = sa->sa_attr_table[tb->lot_attrs[i]].sa_length;
1181 attr_length = reg_length;
1184 attr_length = length_start[length_idx];
1185 idx_len = length_idx++;
1188 func(hdr, data_start, tb->lot_attrs[i], attr_length,
1189 idx_len, reg_length == 0 ? B_TRUE : B_FALSE, userp);
1191 data_start = (void *)P2ROUNDUP(((uintptr_t)data_start +
1198 sa_byteswap_cb(void *hdr, void *attr_addr, sa_attr_type_t attr,
1199 uint16_t length, int length_idx, boolean_t variable_length, void *userp)
1201 sa_handle_t *hdl = userp;
1202 sa_os_t *sa = hdl->sa_os->os_sa;
1204 sa_bswap_table[sa->sa_attr_table[attr].sa_byteswap](attr_addr, length);
1208 sa_byteswap(sa_handle_t *hdl, sa_buf_type_t buftype)
1210 sa_hdr_phys_t *sa_hdr_phys = SA_GET_HDR(hdl, buftype);
1212 sa_os_t *sa = hdl->sa_os->os_sa;
1213 int num_lengths = 1;
1216 ASSERT(MUTEX_HELD(&sa->sa_lock));
1217 if (sa_hdr_phys->sa_magic == SA_MAGIC)
1220 db = SA_GET_DB(hdl, buftype);
1222 if (buftype == SA_SPILL) {
1223 arc_release(db->db_buf, NULL);
1224 arc_buf_thaw(db->db_buf);
1227 sa_hdr_phys->sa_magic = BSWAP_32(sa_hdr_phys->sa_magic);
1228 sa_hdr_phys->sa_layout_info = BSWAP_16(sa_hdr_phys->sa_layout_info);
1231 * Determine number of variable lenghts in header
1232 * The standard 8 byte header has one for free and a
1233 * 16 byte header would have 4 + 1;
1235 if (SA_HDR_SIZE(sa_hdr_phys) > 8)
1236 num_lengths += (SA_HDR_SIZE(sa_hdr_phys) - 8) >> 1;
1237 for (i = 0; i != num_lengths; i++)
1238 sa_hdr_phys->sa_lengths[i] =
1239 BSWAP_16(sa_hdr_phys->sa_lengths[i]);
1241 sa_attr_iter(hdl->sa_os, sa_hdr_phys, DMU_OT_SA,
1242 sa_byteswap_cb, NULL, hdl);
1244 if (buftype == SA_SPILL)
1245 arc_buf_freeze(((dmu_buf_impl_t *)hdl->sa_spill)->db_buf);
1249 sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype)
1251 sa_hdr_phys_t *sa_hdr_phys;
1252 dmu_buf_impl_t *db = SA_GET_DB(hdl, buftype);
1253 dmu_object_type_t bonustype = SA_BONUSTYPE_FROM_DB(db);
1254 sa_os_t *sa = hdl->sa_os->os_sa;
1255 sa_idx_tab_t *idx_tab;
1257 sa_hdr_phys = SA_GET_HDR(hdl, buftype);
1259 mutex_enter(&sa->sa_lock);
1261 /* Do we need to byteswap? */
1263 /* only check if not old znode */
1264 if (IS_SA_BONUSTYPE(bonustype) && sa_hdr_phys->sa_magic != SA_MAGIC &&
1265 sa_hdr_phys->sa_magic != 0) {
1266 VERIFY(BSWAP_32(sa_hdr_phys->sa_magic) == SA_MAGIC);
1267 sa_byteswap(hdl, buftype);
1270 idx_tab = sa_find_idx_tab(hdl->sa_os, bonustype, sa_hdr_phys);
1272 if (buftype == SA_BONUS)
1273 hdl->sa_bonus_tab = idx_tab;
1275 hdl->sa_spill_tab = idx_tab;
1277 mutex_exit(&sa->sa_lock);
1283 sa_evict(dmu_buf_t *db, void *sap)
1285 panic("evicting sa dbuf %p\n", (void *)db);
1289 sa_idx_tab_rele(objset_t *os, void *arg)
1291 sa_os_t *sa = os->os_sa;
1292 sa_idx_tab_t *idx_tab = arg;
1294 if (idx_tab == NULL)
1297 mutex_enter(&sa->sa_lock);
1298 if (refcount_remove(&idx_tab->sa_refcount, NULL) == 0) {
1299 list_remove(&idx_tab->sa_layout->lot_idx_tab, idx_tab);
1300 if (idx_tab->sa_variable_lengths)
1301 kmem_free(idx_tab->sa_variable_lengths,
1303 idx_tab->sa_layout->lot_var_sizes);
1304 refcount_destroy(&idx_tab->sa_refcount);
1305 kmem_free(idx_tab->sa_idx_tab,
1306 sizeof (uint32_t) * sa->sa_num_attrs);
1307 kmem_free(idx_tab, sizeof (sa_idx_tab_t));
1309 mutex_exit(&sa->sa_lock);
1313 sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab)
1315 sa_os_t *sa = os->os_sa;
1317 ASSERT(MUTEX_HELD(&sa->sa_lock));
1318 (void) refcount_add(&idx_tab->sa_refcount, NULL);
1322 sa_handle_destroy(sa_handle_t *hdl)
1324 mutex_enter(&hdl->sa_lock);
1325 (void) dmu_buf_update_user((dmu_buf_t *)hdl->sa_bonus, hdl,
1328 if (hdl->sa_bonus_tab) {
1329 sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab);
1330 hdl->sa_bonus_tab = NULL;
1332 if (hdl->sa_spill_tab) {
1333 sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab);
1334 hdl->sa_spill_tab = NULL;
1337 dmu_buf_rele(hdl->sa_bonus, NULL);
1340 dmu_buf_rele((dmu_buf_t *)hdl->sa_spill, NULL);
1341 mutex_exit(&hdl->sa_lock);
1343 kmem_cache_free(sa_cache, hdl);
1347 sa_handle_get_from_db(objset_t *os, dmu_buf_t *db, void *userp,
1348 sa_handle_type_t hdl_type, sa_handle_t **handlepp)
1351 dmu_object_info_t doi;
1352 sa_handle_t *handle;
1355 dmu_object_info_from_db(db, &doi);
1356 ASSERT(doi.doi_bonus_type == DMU_OT_SA ||
1357 doi.doi_bonus_type == DMU_OT_ZNODE);
1359 /* find handle, if it exists */
1360 /* if one doesn't exist then create a new one, and initialize it */
1362 handle = (hdl_type == SA_HDL_SHARED) ? dmu_buf_get_user(db) : NULL;
1363 if (handle == NULL) {
1364 sa_handle_t *newhandle;
1365 handle = kmem_cache_alloc(sa_cache, KM_SLEEP);
1366 handle->sa_userp = userp;
1367 handle->sa_bonus = db;
1369 handle->sa_spill = NULL;
1371 error = sa_build_index(handle, SA_BONUS);
1372 newhandle = (hdl_type == SA_HDL_SHARED) ?
1373 dmu_buf_set_user_ie(db, handle,
1374 NULL, sa_evict) : NULL;
1376 if (newhandle != NULL) {
1377 kmem_cache_free(sa_cache, handle);
1387 sa_handle_get(objset_t *objset, uint64_t objid, void *userp,
1388 sa_handle_type_t hdl_type, sa_handle_t **handlepp)
1393 if (error = dmu_bonus_hold(objset, objid, NULL, &db))
1396 return (sa_handle_get_from_db(objset, db, userp, hdl_type,
1401 sa_buf_hold(objset_t *objset, uint64_t obj_num, void *tag, dmu_buf_t **db)
1403 return (dmu_bonus_hold(objset, obj_num, tag, db));
1407 sa_buf_rele(dmu_buf_t *db, void *tag)
1409 dmu_buf_rele(db, tag);
1413 sa_lookup_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count)
1416 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1417 return (sa_attr_op(hdl, bulk, count, SA_LOOKUP, NULL));
1421 sa_lookup(sa_handle_t *hdl, sa_attr_type_t attr, void *buf, uint32_t buflen)
1424 sa_bulk_attr_t bulk;
1426 bulk.sa_attr = attr;
1428 bulk.sa_length = buflen;
1429 bulk.sa_data_func = NULL;
1432 mutex_enter(&hdl->sa_lock);
1433 error = sa_lookup_impl(hdl, &bulk, 1);
1434 mutex_exit(&hdl->sa_lock);
1440 sa_lookup_uio(sa_handle_t *hdl, sa_attr_type_t attr, uio_t *uio)
1443 sa_bulk_attr_t bulk;
1445 bulk.sa_data = NULL;
1446 bulk.sa_attr = attr;
1447 bulk.sa_data_func = NULL;
1451 mutex_enter(&hdl->sa_lock);
1452 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) == 0) {
1453 error = uiomove((void *)bulk.sa_addr, MIN(bulk.sa_size,
1454 uio->uio_resid), UIO_READ, uio);
1456 mutex_exit(&hdl->sa_lock);
1463 sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype, void *data)
1465 sa_idx_tab_t *idx_tab;
1466 sa_hdr_phys_t *hdr = (sa_hdr_phys_t *)data;
1467 sa_os_t *sa = os->os_sa;
1468 sa_lot_t *tb, search;
1472 * Deterimine layout number. If SA node and header == 0 then
1473 * force the index table to the dummy "1" empty layout.
1475 * The layout number would only be zero for a newly created file
1476 * that has not added any attributes yet, or with crypto enabled which
1477 * doesn't write any attributes to the bonus buffer.
1480 search.lot_num = SA_LAYOUT_NUM(hdr, bonustype);
1482 tb = avl_find(&sa->sa_layout_num_tree, &search, &loc);
1484 /* Verify header size is consistent with layout information */
1486 ASSERT(IS_SA_BONUSTYPE(bonustype) &&
1487 SA_HDR_SIZE_MATCH_LAYOUT(hdr, tb) || !IS_SA_BONUSTYPE(bonustype) ||
1488 (IS_SA_BONUSTYPE(bonustype) && hdr->sa_layout_info == 0));
1491 * See if any of the already existing TOC entries can be reused?
1494 for (idx_tab = list_head(&tb->lot_idx_tab); idx_tab;
1495 idx_tab = list_next(&tb->lot_idx_tab, idx_tab)) {
1496 boolean_t valid_idx = B_TRUE;
1499 if (tb->lot_var_sizes != 0 &&
1500 idx_tab->sa_variable_lengths != NULL) {
1501 for (i = 0; i != tb->lot_var_sizes; i++) {
1502 if (hdr->sa_lengths[i] !=
1503 idx_tab->sa_variable_lengths[i]) {
1504 valid_idx = B_FALSE;
1510 sa_idx_tab_hold(os, idx_tab);
1515 /* No such luck, create a new entry */
1516 idx_tab = kmem_zalloc(sizeof (sa_idx_tab_t), KM_SLEEP);
1517 idx_tab->sa_idx_tab =
1518 kmem_zalloc(sizeof (uint32_t) * sa->sa_num_attrs, KM_SLEEP);
1519 idx_tab->sa_layout = tb;
1520 refcount_create(&idx_tab->sa_refcount);
1521 if (tb->lot_var_sizes)
1522 idx_tab->sa_variable_lengths = kmem_alloc(sizeof (uint16_t) *
1523 tb->lot_var_sizes, KM_SLEEP);
1525 sa_attr_iter(os, hdr, bonustype, sa_build_idx_tab,
1527 sa_idx_tab_hold(os, idx_tab); /* one hold for consumer */
1528 sa_idx_tab_hold(os, idx_tab); /* one for layout */
1529 list_insert_tail(&tb->lot_idx_tab, idx_tab);
1534 sa_default_locator(void **dataptr, uint32_t *len, uint32_t total_len,
1535 boolean_t start, void *userdata)
1539 *dataptr = userdata;
1544 sa_attr_register_sync(sa_handle_t *hdl, dmu_tx_t *tx)
1546 uint64_t attr_value = 0;
1547 sa_os_t *sa = hdl->sa_os->os_sa;
1548 sa_attr_table_t *tb = sa->sa_attr_table;
1551 mutex_enter(&sa->sa_lock);
1553 if (!sa->sa_need_attr_registration || sa->sa_master_obj == 0) {
1554 mutex_exit(&sa->sa_lock);
1558 if (sa->sa_reg_attr_obj == 0) {
1559 sa->sa_reg_attr_obj = zap_create_link(hdl->sa_os,
1560 DMU_OT_SA_ATTR_REGISTRATION,
1561 sa->sa_master_obj, SA_REGISTRY, tx);
1563 for (i = 0; i != sa->sa_num_attrs; i++) {
1564 if (sa->sa_attr_table[i].sa_registered)
1566 ATTR_ENCODE(attr_value, tb[i].sa_attr, tb[i].sa_length,
1568 VERIFY(0 == zap_update(hdl->sa_os, sa->sa_reg_attr_obj,
1569 tb[i].sa_name, 8, 1, &attr_value, tx));
1570 tb[i].sa_registered = B_TRUE;
1572 sa->sa_need_attr_registration = B_FALSE;
1573 mutex_exit(&sa->sa_lock);
1577 * Replace all attributes with attributes specified in template.
1578 * If dnode had a spill buffer then those attributes will be
1579 * also be replaced, possibly with just an empty spill block
1581 * This interface is intended to only be used for bulk adding of
1582 * attributes for a new file. It will also be used by the ZPL
1583 * when converting and old formatted znode to native SA support.
1586 sa_replace_all_by_template_locked(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
1587 int attr_count, dmu_tx_t *tx)
1589 sa_os_t *sa = hdl->sa_os->os_sa;
1591 if (sa->sa_need_attr_registration)
1592 sa_attr_register_sync(hdl, tx);
1593 return (sa_build_layouts(hdl, attr_desc, attr_count, tx));
1597 sa_replace_all_by_template(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc,
1598 int attr_count, dmu_tx_t *tx)
1602 mutex_enter(&hdl->sa_lock);
1603 error = sa_replace_all_by_template_locked(hdl, attr_desc,
1605 mutex_exit(&hdl->sa_lock);
1610 * Add/remove a single attribute or replace a variable-sized attribute value
1611 * with a value of a different size, and then rewrite the entire set
1613 * Same-length attribute value replacement (including fixed-length attributes)
1614 * is handled more efficiently by the upper layers.
1617 sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
1618 sa_data_op_t action, sa_data_locator_t *locator, void *datastart,
1619 uint16_t buflen, dmu_tx_t *tx)
1621 sa_os_t *sa = hdl->sa_os->os_sa;
1622 dmu_buf_impl_t *db = (dmu_buf_impl_t *)hdl->sa_bonus;
1624 sa_bulk_attr_t *attr_desc;
1626 int bonus_attr_count = 0;
1627 int bonus_data_size, spill_data_size;
1628 int spill_attr_count = 0;
1631 int i, j, k, length_idx;
1633 sa_idx_tab_t *idx_tab;
1637 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1639 /* First make of copy of the old data */
1643 if (dn->dn_bonuslen != 0) {
1644 bonus_data_size = hdl->sa_bonus->db_size;
1645 old_data[0] = kmem_alloc(bonus_data_size, KM_SLEEP);
1646 bcopy(hdl->sa_bonus->db_data, old_data[0],
1647 hdl->sa_bonus->db_size);
1648 bonus_attr_count = hdl->sa_bonus_tab->sa_layout->lot_attr_count;
1654 /* Bring spill buffer online if it isn't currently */
1656 if ((error = sa_get_spill(hdl)) == 0) {
1657 spill_data_size = hdl->sa_spill->db_size;
1658 old_data[1] = kmem_alloc(spill_data_size, KM_SLEEP);
1659 bcopy(hdl->sa_spill->db_data, old_data[1],
1660 hdl->sa_spill->db_size);
1662 hdl->sa_spill_tab->sa_layout->lot_attr_count;
1663 } else if (error && error != ENOENT) {
1665 kmem_free(old_data[0], bonus_data_size);
1671 /* build descriptor of all attributes */
1673 attr_count = bonus_attr_count + spill_attr_count;
1674 if (action == SA_ADD)
1676 else if (action == SA_REMOVE)
1679 attr_desc = kmem_zalloc(sizeof (sa_bulk_attr_t) * attr_count, KM_SLEEP);
1682 * loop through bonus and spill buffer if it exists, and
1683 * build up new attr_descriptor to reset the attributes
1686 count = bonus_attr_count;
1687 hdr = SA_GET_HDR(hdl, SA_BONUS);
1688 idx_tab = SA_IDX_TAB_GET(hdl, SA_BONUS);
1689 for (; k != 2; k++) {
1690 /* iterate over each attribute in layout */
1691 for (i = 0, length_idx = 0; i != count; i++) {
1692 sa_attr_type_t attr;
1694 attr = idx_tab->sa_layout->lot_attrs[i];
1695 if (attr == newattr) {
1696 /* duplicate attributes are not allowed */
1697 ASSERT(action == SA_REPLACE ||
1698 action == SA_REMOVE);
1699 /* must be variable-sized to be replaced here */
1700 if (action == SA_REPLACE) {
1701 ASSERT(SA_REGISTERED_LEN(sa, attr) == 0);
1702 SA_ADD_BULK_ATTR(attr_desc, j, attr,
1703 locator, datastart, buflen);
1706 length = SA_REGISTERED_LEN(sa, attr);
1708 length = hdr->sa_lengths[length_idx];
1711 SA_ADD_BULK_ATTR(attr_desc, j, attr,
1713 (TOC_OFF(idx_tab->sa_idx_tab[attr]) +
1714 (uintptr_t)old_data[k]), length);
1716 if (SA_REGISTERED_LEN(sa, attr) == 0)
1719 if (k == 0 && hdl->sa_spill) {
1720 hdr = SA_GET_HDR(hdl, SA_SPILL);
1721 idx_tab = SA_IDX_TAB_GET(hdl, SA_SPILL);
1722 count = spill_attr_count;
1727 if (action == SA_ADD) {
1728 length = SA_REGISTERED_LEN(sa, newattr);
1732 SA_ADD_BULK_ATTR(attr_desc, j, newattr, locator,
1735 ASSERT3U(j, ==, attr_count);
1737 error = sa_build_layouts(hdl, attr_desc, attr_count, tx);
1740 kmem_free(old_data[0], bonus_data_size);
1742 kmem_free(old_data[1], spill_data_size);
1743 kmem_free(attr_desc, sizeof (sa_bulk_attr_t) * attr_count);
1749 sa_bulk_update_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count,
1753 sa_os_t *sa = hdl->sa_os->os_sa;
1754 dmu_object_type_t bonustype;
1756 bonustype = SA_BONUSTYPE_FROM_DB(SA_GET_DB(hdl, SA_BONUS));
1759 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1761 /* sync out registration table if necessary */
1762 if (sa->sa_need_attr_registration)
1763 sa_attr_register_sync(hdl, tx);
1765 error = sa_attr_op(hdl, bulk, count, SA_UPDATE, tx);
1766 if (error == 0 && !IS_SA_BONUSTYPE(bonustype) && sa->sa_update_cb)
1767 sa->sa_update_cb(hdl, tx);
1773 * update or add new attribute
1776 sa_update(sa_handle_t *hdl, sa_attr_type_t type,
1777 void *buf, uint32_t buflen, dmu_tx_t *tx)
1780 sa_bulk_attr_t bulk;
1782 bulk.sa_attr = type;
1783 bulk.sa_data_func = NULL;
1784 bulk.sa_length = buflen;
1787 mutex_enter(&hdl->sa_lock);
1788 error = sa_bulk_update_impl(hdl, &bulk, 1, tx);
1789 mutex_exit(&hdl->sa_lock);
1794 sa_update_from_cb(sa_handle_t *hdl, sa_attr_type_t attr,
1795 uint32_t buflen, sa_data_locator_t *locator, void *userdata, dmu_tx_t *tx)
1798 sa_bulk_attr_t bulk;
1800 bulk.sa_attr = attr;
1801 bulk.sa_data = userdata;
1802 bulk.sa_data_func = locator;
1803 bulk.sa_length = buflen;
1805 mutex_enter(&hdl->sa_lock);
1806 error = sa_bulk_update_impl(hdl, &bulk, 1, tx);
1807 mutex_exit(&hdl->sa_lock);
1812 * Return size of an attribute
1816 sa_size(sa_handle_t *hdl, sa_attr_type_t attr, int *size)
1818 sa_bulk_attr_t bulk;
1821 bulk.sa_data = NULL;
1822 bulk.sa_attr = attr;
1823 bulk.sa_data_func = NULL;
1826 mutex_enter(&hdl->sa_lock);
1827 if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) != 0) {
1828 mutex_exit(&hdl->sa_lock);
1831 *size = bulk.sa_size;
1833 mutex_exit(&hdl->sa_lock);
1838 sa_bulk_lookup_locked(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
1841 ASSERT(MUTEX_HELD(&hdl->sa_lock));
1842 return (sa_lookup_impl(hdl, attrs, count));
1846 sa_bulk_lookup(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count)
1851 mutex_enter(&hdl->sa_lock);
1852 error = sa_bulk_lookup_locked(hdl, attrs, count);
1853 mutex_exit(&hdl->sa_lock);
1858 sa_bulk_update(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count, dmu_tx_t *tx)
1863 mutex_enter(&hdl->sa_lock);
1864 error = sa_bulk_update_impl(hdl, attrs, count, tx);
1865 mutex_exit(&hdl->sa_lock);
1870 sa_remove(sa_handle_t *hdl, sa_attr_type_t attr, dmu_tx_t *tx)
1874 mutex_enter(&hdl->sa_lock);
1875 error = sa_modify_attrs(hdl, attr, SA_REMOVE, NULL,
1877 mutex_exit(&hdl->sa_lock);
1882 sa_object_info(sa_handle_t *hdl, dmu_object_info_t *doi)
1884 dmu_object_info_from_db((dmu_buf_t *)hdl->sa_bonus, doi);
1888 sa_object_size(sa_handle_t *hdl, uint32_t *blksize, u_longlong_t *nblocks)
1890 dmu_object_size_from_db((dmu_buf_t *)hdl->sa_bonus,
1895 sa_update_user(sa_handle_t *newhdl, sa_handle_t *oldhdl)
1897 (void) dmu_buf_update_user((dmu_buf_t *)newhdl->sa_bonus,
1898 oldhdl, newhdl, NULL, sa_evict);
1899 oldhdl->sa_bonus = NULL;
1903 sa_set_userp(sa_handle_t *hdl, void *ptr)
1905 hdl->sa_userp = ptr;
1909 sa_get_db(sa_handle_t *hdl)
1911 return ((dmu_buf_t *)hdl->sa_bonus);
1915 sa_get_userdata(sa_handle_t *hdl)
1917 return (hdl->sa_userp);
1921 sa_register_update_callback_locked(objset_t *os, sa_update_cb_t *func)
1923 ASSERT(MUTEX_HELD(&os->os_sa->sa_lock));
1924 os->os_sa->sa_update_cb = func;
1928 sa_register_update_callback(objset_t *os, sa_update_cb_t *func)
1931 mutex_enter(&os->os_sa->sa_lock);
1932 sa_register_update_callback_locked(os, func);
1933 mutex_exit(&os->os_sa->sa_lock);
1937 sa_handle_object(sa_handle_t *hdl)
1939 return (hdl->sa_bonus->db_object);
1943 sa_enabled(objset_t *os)
1945 return (os->os_sa == NULL);
1949 sa_set_sa_object(objset_t *os, uint64_t sa_object)
1951 sa_os_t *sa = os->os_sa;
1953 if (sa->sa_master_obj)
1956 sa->sa_master_obj = sa_object;
1962 sa_hdrsize(void *arg)
1964 sa_hdr_phys_t *hdr = arg;
1966 return (SA_HDR_SIZE(hdr));
1970 sa_handle_lock(sa_handle_t *hdl)
1973 mutex_enter(&hdl->sa_lock);
1977 sa_handle_unlock(sa_handle_t *hdl)
1980 mutex_exit(&hdl->sa_lock);