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1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
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. | |
7 | * | |
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. | |
12 | * | |
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] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
22 | * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. | |
23 | */ | |
24 | ||
25 | #include <sys/zfs_context.h> | |
26 | #include <sys/types.h> | |
27 | #include <sys/param.h> | |
28 | #include <sys/systm.h> | |
29 | #include <sys/sysmacros.h> | |
30 | #include <sys/dmu.h> | |
31 | #include <sys/dmu_impl.h> | |
32 | #include <sys/dmu_objset.h> | |
33 | #include <sys/dbuf.h> | |
34 | #include <sys/dnode.h> | |
35 | #include <sys/zap.h> | |
36 | #include <sys/sa.h> | |
37 | #include <sys/sunddi.h> | |
38 | #include <sys/sa_impl.h> | |
39 | #include <sys/dnode.h> | |
40 | #include <sys/errno.h> | |
41 | #include <sys/zfs_context.h> | |
42 | ||
43 | /* | |
44 | * ZFS System attributes: | |
45 | * | |
46 | * A generic mechanism to allow for arbitrary attributes | |
47 | * to be stored in a dnode. The data will be stored in the bonus buffer of | |
48 | * the dnode and if necessary a special "spill" block will be used to handle | |
49 | * overflow situations. The spill block will be sized to fit the data | |
50 | * from 512 - 128K. When a spill block is used the BP (blkptr_t) for the | |
51 | * spill block is stored at the end of the current bonus buffer. Any | |
52 | * attributes that would be in the way of the blkptr_t will be relocated | |
53 | * into the spill block. | |
54 | * | |
55 | * Attribute registration: | |
56 | * | |
57 | * Stored persistently on a per dataset basis | |
58 | * a mapping between attribute "string" names and their actual attribute | |
59 | * numeric values, length, and byteswap function. The names are only used | |
60 | * during registration. All attributes are known by their unique attribute | |
61 | * id value. If an attribute can have a variable size then the value | |
62 | * 0 will be used to indicate this. | |
63 | * | |
64 | * Attribute Layout: | |
65 | * | |
66 | * Attribute layouts are a way to compactly store multiple attributes, but | |
67 | * without taking the overhead associated with managing each attribute | |
68 | * individually. Since you will typically have the same set of attributes | |
69 | * stored in the same order a single table will be used to represent that | |
70 | * layout. The ZPL for example will usually have only about 10 different | |
71 | * layouts (regular files, device files, symlinks, | |
72 | * regular files + scanstamp, files/dir with extended attributes, and then | |
73 | * you have the possibility of all of those minus ACL, because it would | |
74 | * be kicked out into the spill block) | |
75 | * | |
76 | * Layouts are simply an array of the attributes and their | |
77 | * ordering i.e. [0, 1, 4, 5, 2] | |
78 | * | |
79 | * Each distinct layout is given a unique layout number and that is whats | |
80 | * stored in the header at the beginning of the SA data buffer. | |
81 | * | |
82 | * A layout only covers a single dbuf (bonus or spill). If a set of | |
83 | * attributes is split up between the bonus buffer and a spill buffer then | |
84 | * two different layouts will be used. This allows us to byteswap the | |
85 | * spill without looking at the bonus buffer and keeps the on disk format of | |
86 | * the bonus and spill buffer the same. | |
87 | * | |
88 | * Adding a single attribute will cause the entire set of attributes to | |
89 | * be rewritten and could result in a new layout number being constructed | |
90 | * as part of the rewrite if no such layout exists for the new set of | |
91 | * attribues. The new attribute will be appended to the end of the already | |
92 | * existing attributes. | |
93 | * | |
94 | * Both the attribute registration and attribute layout information are | |
95 | * stored in normal ZAP attributes. Their should be a small number of | |
96 | * known layouts and the set of attributes is assumed to typically be quite | |
97 | * small. | |
98 | * | |
99 | * The registered attributes and layout "table" information is maintained | |
100 | * in core and a special "sa_os_t" is attached to the objset_t. | |
101 | * | |
102 | * A special interface is provided to allow for quickly applying | |
103 | * a large set of attributes at once. sa_replace_all_by_template() is | |
104 | * used to set an array of attributes. This is used by the ZPL when | |
105 | * creating a brand new file. The template that is passed into the function | |
106 | * specifies the attribute, size for variable length attributes, location of | |
107 | * data and special "data locator" function if the data isn't in a contiguous | |
108 | * location. | |
109 | * | |
110 | * Byteswap implications: | |
111 | * Since the SA attributes are not entirely self describing we can't do | |
112 | * the normal byteswap processing. The special ZAP layout attribute and | |
113 | * attribute registration attributes define the byteswap function and the | |
114 | * size of the attributes, unless it is variable sized. | |
115 | * The normal ZFS byteswapping infrastructure assumes you don't need | |
116 | * to read any objects in order to do the necessary byteswapping. Whereas | |
117 | * SA attributes can only be properly byteswapped if the dataset is opened | |
118 | * and the layout/attribute ZAP attributes are available. Because of this | |
119 | * the SA attributes will be byteswapped when they are first accessed by | |
120 | * the SA code that will read the SA data. | |
121 | */ | |
122 | ||
123 | typedef void (sa_iterfunc_t)(void *hdr, void *addr, sa_attr_type_t, | |
124 | uint16_t length, int length_idx, boolean_t, void *userp); | |
125 | ||
126 | static int sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype); | |
127 | static void sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab); | |
128 | static void *sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype, | |
129 | void *data); | |
130 | static void sa_idx_tab_rele(objset_t *os, void *arg); | |
131 | static void sa_copy_data(sa_data_locator_t *func, void *start, void *target, | |
132 | int buflen); | |
133 | static int sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr, | |
134 | sa_data_op_t action, sa_data_locator_t *locator, void *datastart, | |
135 | uint16_t buflen, dmu_tx_t *tx); | |
136 | ||
137 | arc_byteswap_func_t *sa_bswap_table[] = { | |
138 | byteswap_uint64_array, | |
139 | byteswap_uint32_array, | |
140 | byteswap_uint16_array, | |
141 | byteswap_uint8_array, | |
142 | zfs_acl_byteswap, | |
143 | }; | |
144 | ||
145 | #define SA_COPY_DATA(f, s, t, l) \ | |
146 | { \ | |
147 | if (f == NULL) { \ | |
148 | if (l == 8) { \ | |
149 | *(uint64_t *)t = *(uint64_t *)s; \ | |
150 | } else if (l == 16) { \ | |
151 | *(uint64_t *)t = *(uint64_t *)s; \ | |
152 | *(uint64_t *)((uintptr_t)t + 8) = \ | |
153 | *(uint64_t *)((uintptr_t)s + 8); \ | |
154 | } else { \ | |
155 | bcopy(s, t, l); \ | |
156 | } \ | |
157 | } else \ | |
158 | sa_copy_data(f, s, t, l); \ | |
159 | } | |
160 | ||
161 | /* | |
162 | * This table is fixed and cannot be changed. Its purpose is to | |
163 | * allow the SA code to work with both old/new ZPL file systems. | |
164 | * It contains the list of legacy attributes. These attributes aren't | |
165 | * stored in the "attribute" registry zap objects, since older ZPL file systems | |
166 | * won't have the registry. Only objsets of type ZFS_TYPE_FILESYSTEM will | |
167 | * use this static table. | |
168 | */ | |
169 | sa_attr_reg_t sa_legacy_attrs[] = { | |
170 | {"ZPL_ATIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 0}, | |
171 | {"ZPL_MTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 1}, | |
172 | {"ZPL_CTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 2}, | |
173 | {"ZPL_CRTIME", sizeof (uint64_t) * 2, SA_UINT64_ARRAY, 3}, | |
174 | {"ZPL_GEN", sizeof (uint64_t), SA_UINT64_ARRAY, 4}, | |
175 | {"ZPL_MODE", sizeof (uint64_t), SA_UINT64_ARRAY, 5}, | |
176 | {"ZPL_SIZE", sizeof (uint64_t), SA_UINT64_ARRAY, 6}, | |
177 | {"ZPL_PARENT", sizeof (uint64_t), SA_UINT64_ARRAY, 7}, | |
178 | {"ZPL_LINKS", sizeof (uint64_t), SA_UINT64_ARRAY, 8}, | |
179 | {"ZPL_XATTR", sizeof (uint64_t), SA_UINT64_ARRAY, 9}, | |
180 | {"ZPL_RDEV", sizeof (uint64_t), SA_UINT64_ARRAY, 10}, | |
181 | {"ZPL_FLAGS", sizeof (uint64_t), SA_UINT64_ARRAY, 11}, | |
182 | {"ZPL_UID", sizeof (uint64_t), SA_UINT64_ARRAY, 12}, | |
183 | {"ZPL_GID", sizeof (uint64_t), SA_UINT64_ARRAY, 13}, | |
184 | {"ZPL_PAD", sizeof (uint64_t) * 4, SA_UINT64_ARRAY, 14}, | |
185 | {"ZPL_ZNODE_ACL", 88, SA_UINT8_ARRAY, 15}, | |
186 | }; | |
187 | ||
188 | /* | |
189 | * ZPL legacy layout | |
190 | * This is only used for objects of type DMU_OT_ZNODE | |
191 | */ | |
192 | sa_attr_type_t sa_legacy_zpl_layout[] = { | |
193 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 | |
194 | }; | |
195 | ||
196 | /* | |
197 | * Special dummy layout used for buffers with no attributes. | |
198 | */ | |
199 | ||
200 | sa_attr_type_t sa_dummy_zpl_layout[] = { 0 }; | |
201 | ||
202 | static int sa_legacy_attr_count = 16; | |
203 | static kmem_cache_t *sa_cache = NULL; | |
204 | ||
205 | /*ARGSUSED*/ | |
206 | static int | |
207 | sa_cache_constructor(void *buf, void *unused, int kmflag) | |
208 | { | |
209 | sa_handle_t *hdl = buf; | |
210 | ||
211 | hdl->sa_bonus_tab = NULL; | |
212 | hdl->sa_spill_tab = NULL; | |
213 | hdl->sa_os = NULL; | |
214 | hdl->sa_userp = NULL; | |
215 | hdl->sa_bonus = NULL; | |
216 | hdl->sa_spill = NULL; | |
217 | mutex_init(&hdl->sa_lock, NULL, MUTEX_DEFAULT, NULL); | |
218 | return (0); | |
219 | } | |
220 | ||
221 | /*ARGSUSED*/ | |
222 | static void | |
223 | sa_cache_destructor(void *buf, void *unused) | |
224 | { | |
225 | sa_handle_t *hdl = buf; | |
226 | mutex_destroy(&hdl->sa_lock); | |
227 | } | |
228 | ||
229 | void | |
230 | sa_cache_init(void) | |
231 | { | |
232 | sa_cache = kmem_cache_create("sa_cache", | |
233 | sizeof (sa_handle_t), 0, sa_cache_constructor, | |
234 | sa_cache_destructor, NULL, NULL, NULL, 0); | |
235 | } | |
236 | ||
237 | void | |
238 | sa_cache_fini(void) | |
239 | { | |
240 | if (sa_cache) | |
241 | kmem_cache_destroy(sa_cache); | |
242 | } | |
243 | ||
244 | static int | |
245 | layout_num_compare(const void *arg1, const void *arg2) | |
246 | { | |
247 | const sa_lot_t *node1 = arg1; | |
248 | const sa_lot_t *node2 = arg2; | |
249 | ||
250 | if (node1->lot_num > node2->lot_num) | |
251 | return (1); | |
252 | else if (node1->lot_num < node2->lot_num) | |
253 | return (-1); | |
254 | return (0); | |
255 | } | |
256 | ||
257 | static int | |
258 | layout_hash_compare(const void *arg1, const void *arg2) | |
259 | { | |
260 | const sa_lot_t *node1 = arg1; | |
261 | const sa_lot_t *node2 = arg2; | |
262 | ||
263 | if (node1->lot_hash > node2->lot_hash) | |
264 | return (1); | |
265 | if (node1->lot_hash < node2->lot_hash) | |
266 | return (-1); | |
267 | if (node1->lot_instance > node2->lot_instance) | |
268 | return (1); | |
269 | if (node1->lot_instance < node2->lot_instance) | |
270 | return (-1); | |
271 | return (0); | |
272 | } | |
273 | ||
274 | boolean_t | |
275 | sa_layout_equal(sa_lot_t *tbf, sa_attr_type_t *attrs, int count) | |
276 | { | |
277 | int i; | |
278 | ||
279 | if (count != tbf->lot_attr_count) | |
280 | return (1); | |
281 | ||
282 | for (i = 0; i != count; i++) { | |
283 | if (attrs[i] != tbf->lot_attrs[i]) | |
284 | return (1); | |
285 | } | |
286 | return (0); | |
287 | } | |
288 | ||
289 | #define SA_ATTR_HASH(attr) (zfs_crc64_table[(-1ULL ^ attr) & 0xFF]) | |
290 | ||
291 | static uint64_t | |
292 | sa_layout_info_hash(sa_attr_type_t *attrs, int attr_count) | |
293 | { | |
294 | int i; | |
295 | uint64_t crc = -1ULL; | |
296 | ||
297 | for (i = 0; i != attr_count; i++) | |
298 | crc ^= SA_ATTR_HASH(attrs[i]); | |
299 | ||
300 | return (crc); | |
301 | } | |
302 | ||
572e2857 BB |
303 | static int |
304 | sa_get_spill(sa_handle_t *hdl) | |
428870ff BB |
305 | { |
306 | int rc; | |
307 | if (hdl->sa_spill == NULL) { | |
308 | if ((rc = dmu_spill_hold_existing(hdl->sa_bonus, NULL, | |
309 | &hdl->sa_spill)) == 0) | |
310 | VERIFY(0 == sa_build_index(hdl, SA_SPILL)); | |
311 | } else { | |
312 | rc = 0; | |
313 | } | |
314 | ||
572e2857 | 315 | return (rc); |
428870ff BB |
316 | } |
317 | ||
318 | /* | |
319 | * Main attribute lookup/update function | |
320 | * returns 0 for success or non zero for failures | |
321 | * | |
322 | * Operates on bulk array, first failure will abort further processing | |
323 | */ | |
324 | int | |
325 | sa_attr_op(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count, | |
326 | sa_data_op_t data_op, dmu_tx_t *tx) | |
327 | { | |
328 | sa_os_t *sa = hdl->sa_os->os_sa; | |
329 | int i; | |
330 | int error = 0; | |
331 | sa_buf_type_t buftypes; | |
332 | ||
333 | buftypes = 0; | |
334 | ||
335 | ASSERT(count > 0); | |
336 | for (i = 0; i != count; i++) { | |
337 | ASSERT(bulk[i].sa_attr <= hdl->sa_os->os_sa->sa_num_attrs); | |
338 | ||
339 | bulk[i].sa_addr = NULL; | |
340 | /* First check the bonus buffer */ | |
341 | ||
342 | if (hdl->sa_bonus_tab && TOC_ATTR_PRESENT( | |
343 | hdl->sa_bonus_tab->sa_idx_tab[bulk[i].sa_attr])) { | |
344 | SA_ATTR_INFO(sa, hdl->sa_bonus_tab, | |
345 | SA_GET_HDR(hdl, SA_BONUS), | |
346 | bulk[i].sa_attr, bulk[i], SA_BONUS, hdl); | |
347 | if (tx && !(buftypes & SA_BONUS)) { | |
348 | dmu_buf_will_dirty(hdl->sa_bonus, tx); | |
349 | buftypes |= SA_BONUS; | |
350 | } | |
351 | } | |
572e2857 BB |
352 | if (bulk[i].sa_addr == NULL && |
353 | ((error = sa_get_spill(hdl)) == 0)) { | |
428870ff BB |
354 | if (TOC_ATTR_PRESENT( |
355 | hdl->sa_spill_tab->sa_idx_tab[bulk[i].sa_attr])) { | |
356 | SA_ATTR_INFO(sa, hdl->sa_spill_tab, | |
357 | SA_GET_HDR(hdl, SA_SPILL), | |
358 | bulk[i].sa_attr, bulk[i], SA_SPILL, hdl); | |
359 | if (tx && !(buftypes & SA_SPILL) && | |
360 | bulk[i].sa_size == bulk[i].sa_length) { | |
361 | dmu_buf_will_dirty(hdl->sa_spill, tx); | |
362 | buftypes |= SA_SPILL; | |
363 | } | |
364 | } | |
365 | } | |
572e2857 BB |
366 | if (error && error != ENOENT) { |
367 | return ((error == ECKSUM) ? EIO : error); | |
368 | } | |
369 | ||
428870ff BB |
370 | switch (data_op) { |
371 | case SA_LOOKUP: | |
372 | if (bulk[i].sa_addr == NULL) | |
373 | return (ENOENT); | |
374 | if (bulk[i].sa_data) { | |
375 | SA_COPY_DATA(bulk[i].sa_data_func, | |
376 | bulk[i].sa_addr, bulk[i].sa_data, | |
377 | bulk[i].sa_size); | |
378 | } | |
379 | continue; | |
380 | ||
381 | case SA_UPDATE: | |
382 | /* existing rewrite of attr */ | |
383 | if (bulk[i].sa_addr && | |
384 | bulk[i].sa_size == bulk[i].sa_length) { | |
385 | SA_COPY_DATA(bulk[i].sa_data_func, | |
386 | bulk[i].sa_data, bulk[i].sa_addr, | |
387 | bulk[i].sa_length); | |
388 | continue; | |
389 | } else if (bulk[i].sa_addr) { /* attr size change */ | |
390 | error = sa_modify_attrs(hdl, bulk[i].sa_attr, | |
391 | SA_REPLACE, bulk[i].sa_data_func, | |
392 | bulk[i].sa_data, bulk[i].sa_length, tx); | |
393 | } else { /* adding new attribute */ | |
394 | error = sa_modify_attrs(hdl, bulk[i].sa_attr, | |
395 | SA_ADD, bulk[i].sa_data_func, | |
396 | bulk[i].sa_data, bulk[i].sa_length, tx); | |
397 | } | |
398 | if (error) | |
399 | return (error); | |
400 | break; | |
401 | } | |
402 | } | |
403 | return (error); | |
404 | } | |
405 | ||
406 | static sa_lot_t * | |
407 | sa_add_layout_entry(objset_t *os, sa_attr_type_t *attrs, int attr_count, | |
408 | uint64_t lot_num, uint64_t hash, boolean_t zapadd, dmu_tx_t *tx) | |
409 | { | |
410 | sa_os_t *sa = os->os_sa; | |
411 | sa_lot_t *tb, *findtb; | |
412 | int i; | |
413 | avl_index_t loc; | |
414 | ||
415 | ASSERT(MUTEX_HELD(&sa->sa_lock)); | |
416 | tb = kmem_zalloc(sizeof (sa_lot_t), KM_SLEEP); | |
417 | tb->lot_attr_count = attr_count; | |
418 | tb->lot_attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count, | |
419 | KM_SLEEP); | |
420 | bcopy(attrs, tb->lot_attrs, sizeof (sa_attr_type_t) * attr_count); | |
421 | tb->lot_num = lot_num; | |
422 | tb->lot_hash = hash; | |
423 | tb->lot_instance = 0; | |
424 | ||
425 | if (zapadd) { | |
426 | char attr_name[8]; | |
427 | ||
428 | if (sa->sa_layout_attr_obj == 0) { | |
428870ff BB |
429 | sa->sa_layout_attr_obj = zap_create(os, |
430 | DMU_OT_SA_ATTR_LAYOUTS, DMU_OT_NONE, 0, tx); | |
572e2857 BB |
431 | VERIFY(zap_add(os, sa->sa_master_obj, SA_LAYOUTS, 8, 1, |
432 | &sa->sa_layout_attr_obj, tx) == 0); | |
428870ff BB |
433 | } |
434 | ||
435 | (void) snprintf(attr_name, sizeof (attr_name), | |
436 | "%d", (int)lot_num); | |
437 | VERIFY(0 == zap_update(os, os->os_sa->sa_layout_attr_obj, | |
438 | attr_name, 2, attr_count, attrs, tx)); | |
439 | } | |
440 | ||
441 | list_create(&tb->lot_idx_tab, sizeof (sa_idx_tab_t), | |
442 | offsetof(sa_idx_tab_t, sa_next)); | |
443 | ||
444 | for (i = 0; i != attr_count; i++) { | |
445 | if (sa->sa_attr_table[tb->lot_attrs[i]].sa_length == 0) | |
446 | tb->lot_var_sizes++; | |
447 | } | |
448 | ||
449 | avl_add(&sa->sa_layout_num_tree, tb); | |
450 | ||
451 | /* verify we don't have a hash collision */ | |
452 | if ((findtb = avl_find(&sa->sa_layout_hash_tree, tb, &loc)) != NULL) { | |
453 | for (; findtb && findtb->lot_hash == hash; | |
454 | findtb = AVL_NEXT(&sa->sa_layout_hash_tree, findtb)) { | |
455 | if (findtb->lot_instance != tb->lot_instance) | |
456 | break; | |
457 | tb->lot_instance++; | |
458 | } | |
459 | } | |
460 | avl_add(&sa->sa_layout_hash_tree, tb); | |
461 | return (tb); | |
462 | } | |
463 | ||
464 | static void | |
465 | sa_find_layout(objset_t *os, uint64_t hash, sa_attr_type_t *attrs, | |
466 | int count, dmu_tx_t *tx, sa_lot_t **lot) | |
467 | { | |
468 | sa_lot_t *tb, tbsearch; | |
469 | avl_index_t loc; | |
470 | sa_os_t *sa = os->os_sa; | |
471 | boolean_t found = B_FALSE; | |
472 | ||
473 | mutex_enter(&sa->sa_lock); | |
474 | tbsearch.lot_hash = hash; | |
475 | tbsearch.lot_instance = 0; | |
476 | tb = avl_find(&sa->sa_layout_hash_tree, &tbsearch, &loc); | |
477 | if (tb) { | |
478 | for (; tb && tb->lot_hash == hash; | |
479 | tb = AVL_NEXT(&sa->sa_layout_hash_tree, tb)) { | |
480 | if (sa_layout_equal(tb, attrs, count) == 0) { | |
481 | found = B_TRUE; | |
482 | break; | |
483 | } | |
484 | } | |
485 | } | |
486 | if (!found) { | |
487 | tb = sa_add_layout_entry(os, attrs, count, | |
488 | avl_numnodes(&sa->sa_layout_num_tree), hash, B_TRUE, tx); | |
489 | } | |
490 | mutex_exit(&sa->sa_lock); | |
491 | *lot = tb; | |
492 | } | |
493 | ||
494 | static int | |
495 | sa_resize_spill(sa_handle_t *hdl, uint32_t size, dmu_tx_t *tx) | |
496 | { | |
497 | int error; | |
498 | uint32_t blocksize; | |
499 | ||
500 | if (size == 0) { | |
501 | blocksize = SPA_MINBLOCKSIZE; | |
502 | } else if (size > SPA_MAXBLOCKSIZE) { | |
503 | ASSERT(0); | |
504 | return (EFBIG); | |
505 | } else { | |
506 | blocksize = P2ROUNDUP_TYPED(size, SPA_MINBLOCKSIZE, uint32_t); | |
507 | } | |
508 | ||
509 | error = dbuf_spill_set_blksz(hdl->sa_spill, blocksize, tx); | |
510 | ASSERT(error == 0); | |
511 | return (error); | |
512 | } | |
513 | ||
514 | static void | |
515 | sa_copy_data(sa_data_locator_t *func, void *datastart, void *target, int buflen) | |
516 | { | |
517 | if (func == NULL) { | |
518 | bcopy(datastart, target, buflen); | |
519 | } else { | |
520 | boolean_t start; | |
521 | int bytes; | |
522 | void *dataptr; | |
523 | void *saptr = target; | |
524 | uint32_t length; | |
525 | ||
526 | start = B_TRUE; | |
527 | bytes = 0; | |
528 | while (bytes < buflen) { | |
529 | func(&dataptr, &length, buflen, start, datastart); | |
530 | bcopy(dataptr, saptr, length); | |
531 | saptr = (void *)((caddr_t)saptr + length); | |
532 | bytes += length; | |
533 | start = B_FALSE; | |
534 | } | |
535 | } | |
536 | } | |
537 | ||
538 | /* | |
539 | * Determine several different sizes | |
540 | * first the sa header size | |
541 | * the number of bytes to be stored | |
542 | * if spill would occur the index in the attribute array is returned | |
543 | * | |
544 | * the boolean will_spill will be set when spilling is necessary. It | |
545 | * is only set when the buftype is SA_BONUS | |
546 | */ | |
547 | static int | |
548 | sa_find_sizes(sa_os_t *sa, sa_bulk_attr_t *attr_desc, int attr_count, | |
549 | dmu_buf_t *db, sa_buf_type_t buftype, int *index, int *total, | |
550 | boolean_t *will_spill) | |
551 | { | |
552 | int var_size = 0; | |
553 | int i; | |
554 | int full_space; | |
555 | int hdrsize; | |
556 | boolean_t done = B_FALSE; | |
557 | ||
558 | if (buftype == SA_BONUS && sa->sa_force_spill) { | |
559 | *total = 0; | |
560 | *index = 0; | |
561 | *will_spill = B_TRUE; | |
562 | return (0); | |
563 | } | |
564 | ||
565 | *index = -1; | |
566 | *total = 0; | |
567 | ||
568 | if (buftype == SA_BONUS) | |
569 | *will_spill = B_FALSE; | |
570 | ||
571 | hdrsize = (SA_BONUSTYPE_FROM_DB(db) == DMU_OT_ZNODE) ? 0 : | |
572 | sizeof (sa_hdr_phys_t); | |
573 | ||
574 | full_space = (buftype == SA_BONUS) ? DN_MAX_BONUSLEN : db->db_size; | |
575 | ||
576 | for (i = 0; i != attr_count; i++) { | |
577 | boolean_t is_var_sz; | |
578 | ||
579 | *total += attr_desc[i].sa_length; | |
580 | if (done) | |
581 | goto next; | |
582 | ||
583 | is_var_sz = (SA_REGISTERED_LEN(sa, attr_desc[i].sa_attr) == 0); | |
584 | if (is_var_sz) { | |
585 | var_size++; | |
586 | } | |
587 | ||
588 | if (is_var_sz && var_size > 1) { | |
589 | if (P2ROUNDUP(hdrsize + sizeof (uint16_t), 8) + | |
590 | *total < full_space) { | |
591 | hdrsize += sizeof (uint16_t); | |
592 | } else { | |
593 | done = B_TRUE; | |
594 | *index = i; | |
595 | if (buftype == SA_BONUS) | |
596 | *will_spill = B_TRUE; | |
597 | continue; | |
598 | } | |
599 | } | |
600 | ||
601 | /* | |
602 | * find index of where spill *could* occur. | |
603 | * Then continue to count of remainder attribute | |
604 | * space. The sum is used later for sizing bonus | |
605 | * and spill buffer. | |
606 | */ | |
607 | if (buftype == SA_BONUS && *index == -1 && | |
608 | P2ROUNDUP(*total + hdrsize, 8) > | |
609 | (full_space - sizeof (blkptr_t))) { | |
610 | *index = i; | |
611 | done = B_TRUE; | |
612 | } | |
613 | ||
614 | next: | |
615 | if (P2ROUNDUP(*total + hdrsize, 8) > full_space && | |
616 | buftype == SA_BONUS) | |
617 | *will_spill = B_TRUE; | |
618 | } | |
619 | ||
620 | hdrsize = P2ROUNDUP(hdrsize, 8); | |
621 | return (hdrsize); | |
622 | } | |
623 | ||
624 | #define BUF_SPACE_NEEDED(total, header) (total + header) | |
625 | ||
626 | /* | |
627 | * Find layout that corresponds to ordering of attributes | |
628 | * If not found a new layout number is created and added to | |
629 | * persistent layout tables. | |
630 | */ | |
631 | static int | |
632 | sa_build_layouts(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, int attr_count, | |
633 | dmu_tx_t *tx) | |
634 | { | |
635 | sa_os_t *sa = hdl->sa_os->os_sa; | |
636 | uint64_t hash; | |
637 | sa_buf_type_t buftype; | |
638 | sa_hdr_phys_t *sahdr; | |
639 | void *data_start; | |
640 | int buf_space; | |
641 | sa_attr_type_t *attrs, *attrs_start; | |
642 | int i, lot_count; | |
643 | int hdrsize, spillhdrsize; | |
644 | int used; | |
645 | dmu_object_type_t bonustype; | |
646 | sa_lot_t *lot; | |
647 | int len_idx; | |
648 | int spill_used; | |
649 | boolean_t spilling; | |
650 | ||
651 | dmu_buf_will_dirty(hdl->sa_bonus, tx); | |
652 | bonustype = SA_BONUSTYPE_FROM_DB(hdl->sa_bonus); | |
653 | ||
654 | /* first determine bonus header size and sum of all attributes */ | |
655 | hdrsize = sa_find_sizes(sa, attr_desc, attr_count, hdl->sa_bonus, | |
656 | SA_BONUS, &i, &used, &spilling); | |
657 | ||
658 | if (used > SPA_MAXBLOCKSIZE) | |
659 | return (EFBIG); | |
660 | ||
661 | VERIFY(0 == dmu_set_bonus(hdl->sa_bonus, spilling ? | |
662 | MIN(DN_MAX_BONUSLEN - sizeof (blkptr_t), used + hdrsize) : | |
663 | used + hdrsize, tx)); | |
664 | ||
665 | ASSERT((bonustype == DMU_OT_ZNODE && spilling == 0) || | |
666 | bonustype == DMU_OT_SA); | |
667 | ||
668 | /* setup and size spill buffer when needed */ | |
669 | if (spilling) { | |
670 | boolean_t dummy; | |
671 | ||
672 | if (hdl->sa_spill == NULL) { | |
572e2857 BB |
673 | VERIFY(dmu_spill_hold_by_bonus(hdl->sa_bonus, NULL, |
674 | &hdl->sa_spill) == 0); | |
428870ff BB |
675 | } |
676 | dmu_buf_will_dirty(hdl->sa_spill, tx); | |
677 | ||
678 | spillhdrsize = sa_find_sizes(sa, &attr_desc[i], | |
679 | attr_count - i, hdl->sa_spill, SA_SPILL, &i, | |
680 | &spill_used, &dummy); | |
681 | ||
682 | if (spill_used > SPA_MAXBLOCKSIZE) | |
683 | return (EFBIG); | |
684 | ||
685 | buf_space = hdl->sa_spill->db_size - spillhdrsize; | |
686 | if (BUF_SPACE_NEEDED(spill_used, spillhdrsize) > | |
687 | hdl->sa_spill->db_size) | |
688 | VERIFY(0 == sa_resize_spill(hdl, | |
689 | BUF_SPACE_NEEDED(spill_used, spillhdrsize), tx)); | |
690 | } | |
691 | ||
692 | /* setup starting pointers to lay down data */ | |
693 | data_start = (void *)((uintptr_t)hdl->sa_bonus->db_data + hdrsize); | |
694 | sahdr = (sa_hdr_phys_t *)hdl->sa_bonus->db_data; | |
695 | buftype = SA_BONUS; | |
696 | ||
697 | if (spilling) | |
698 | buf_space = (sa->sa_force_spill) ? | |
699 | 0 : SA_BLKPTR_SPACE - hdrsize; | |
700 | else | |
701 | buf_space = hdl->sa_bonus->db_size - hdrsize; | |
702 | ||
703 | attrs_start = attrs = kmem_alloc(sizeof (sa_attr_type_t) * attr_count, | |
704 | KM_SLEEP); | |
705 | lot_count = 0; | |
706 | ||
707 | for (i = 0, len_idx = 0, hash = -1ULL; i != attr_count; i++) { | |
708 | uint16_t length; | |
709 | ||
710 | attrs[i] = attr_desc[i].sa_attr; | |
711 | length = SA_REGISTERED_LEN(sa, attrs[i]); | |
712 | if (length == 0) | |
713 | length = attr_desc[i].sa_length; | |
714 | ||
715 | if (buf_space < length) { /* switch to spill buffer */ | |
572e2857 | 716 | VERIFY(bonustype == DMU_OT_SA); |
428870ff BB |
717 | if (buftype == SA_BONUS && !sa->sa_force_spill) { |
718 | sa_find_layout(hdl->sa_os, hash, attrs_start, | |
719 | lot_count, tx, &lot); | |
720 | SA_SET_HDR(sahdr, lot->lot_num, hdrsize); | |
721 | } | |
722 | ||
723 | buftype = SA_SPILL; | |
724 | hash = -1ULL; | |
725 | len_idx = 0; | |
726 | ||
727 | sahdr = (sa_hdr_phys_t *)hdl->sa_spill->db_data; | |
728 | sahdr->sa_magic = SA_MAGIC; | |
729 | data_start = (void *)((uintptr_t)sahdr + | |
730 | spillhdrsize); | |
731 | attrs_start = &attrs[i]; | |
732 | buf_space = hdl->sa_spill->db_size - spillhdrsize; | |
733 | lot_count = 0; | |
734 | } | |
735 | hash ^= SA_ATTR_HASH(attrs[i]); | |
736 | attr_desc[i].sa_addr = data_start; | |
737 | attr_desc[i].sa_size = length; | |
738 | SA_COPY_DATA(attr_desc[i].sa_data_func, attr_desc[i].sa_data, | |
739 | data_start, length); | |
740 | if (sa->sa_attr_table[attrs[i]].sa_length == 0) { | |
741 | sahdr->sa_lengths[len_idx++] = length; | |
742 | } | |
743 | data_start = (void *)P2ROUNDUP(((uintptr_t)data_start + | |
744 | length), 8); | |
745 | buf_space -= P2ROUNDUP(length, 8); | |
746 | lot_count++; | |
747 | } | |
748 | ||
749 | sa_find_layout(hdl->sa_os, hash, attrs_start, lot_count, tx, &lot); | |
572e2857 BB |
750 | |
751 | /* | |
752 | * Verify that old znodes always have layout number 0. | |
753 | * Must be DMU_OT_SA for arbitrary layouts | |
754 | */ | |
755 | VERIFY((bonustype == DMU_OT_ZNODE && lot->lot_num == 0) || | |
756 | (bonustype == DMU_OT_SA && lot->lot_num > 1)); | |
757 | ||
428870ff BB |
758 | if (bonustype == DMU_OT_SA) { |
759 | SA_SET_HDR(sahdr, lot->lot_num, | |
760 | buftype == SA_BONUS ? hdrsize : spillhdrsize); | |
761 | } | |
762 | ||
763 | kmem_free(attrs, sizeof (sa_attr_type_t) * attr_count); | |
764 | if (hdl->sa_bonus_tab) { | |
765 | sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab); | |
766 | hdl->sa_bonus_tab = NULL; | |
767 | } | |
768 | if (!sa->sa_force_spill) | |
769 | VERIFY(0 == sa_build_index(hdl, SA_BONUS)); | |
770 | if (hdl->sa_spill) { | |
771 | sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab); | |
772 | if (!spilling) { | |
773 | /* | |
774 | * remove spill block that is no longer needed. | |
428870ff BB |
775 | */ |
776 | dmu_buf_rele(hdl->sa_spill, NULL); | |
777 | hdl->sa_spill = NULL; | |
778 | hdl->sa_spill_tab = NULL; | |
779 | VERIFY(0 == dmu_rm_spill(hdl->sa_os, | |
780 | sa_handle_object(hdl), tx)); | |
781 | } else { | |
782 | VERIFY(0 == sa_build_index(hdl, SA_SPILL)); | |
783 | } | |
784 | } | |
785 | ||
786 | return (0); | |
787 | } | |
788 | ||
789 | static void | |
572e2857 BB |
790 | sa_free_attr_table(sa_os_t *sa) |
791 | { | |
792 | int i; | |
793 | ||
794 | if (sa->sa_attr_table == NULL) | |
795 | return; | |
796 | ||
797 | for (i = 0; i != sa->sa_num_attrs; i++) { | |
798 | if (sa->sa_attr_table[i].sa_name) | |
799 | kmem_free(sa->sa_attr_table[i].sa_name, | |
800 | strlen(sa->sa_attr_table[i].sa_name) + 1); | |
801 | } | |
802 | ||
803 | kmem_free(sa->sa_attr_table, | |
804 | sizeof (sa_attr_table_t) * sa->sa_num_attrs); | |
805 | ||
806 | sa->sa_attr_table = NULL; | |
807 | } | |
808 | ||
809 | static int | |
428870ff BB |
810 | sa_attr_table_setup(objset_t *os, sa_attr_reg_t *reg_attrs, int count) |
811 | { | |
812 | sa_os_t *sa = os->os_sa; | |
813 | uint64_t sa_attr_count = 0; | |
572e2857 | 814 | uint64_t sa_reg_count; |
428870ff BB |
815 | int error = 0; |
816 | uint64_t attr_value; | |
817 | sa_attr_table_t *tb; | |
818 | zap_cursor_t zc; | |
819 | zap_attribute_t za; | |
820 | int registered_count = 0; | |
821 | int i; | |
822 | dmu_objset_type_t ostype = dmu_objset_type(os); | |
823 | ||
824 | sa->sa_user_table = | |
825 | kmem_zalloc(count * sizeof (sa_attr_type_t), KM_SLEEP); | |
826 | sa->sa_user_table_sz = count * sizeof (sa_attr_type_t); | |
827 | ||
572e2857 BB |
828 | if (sa->sa_reg_attr_obj != 0) { |
829 | error = zap_count(os, sa->sa_reg_attr_obj, | |
830 | &sa_attr_count); | |
831 | ||
832 | /* | |
833 | * Make sure we retrieved a count and that it isn't zero | |
834 | */ | |
835 | if (error || (error == 0 && sa_attr_count == 0)) { | |
836 | if (error == 0) | |
837 | error = EINVAL; | |
838 | goto bail; | |
839 | } | |
840 | sa_reg_count = sa_attr_count; | |
841 | } | |
428870ff BB |
842 | |
843 | if (ostype == DMU_OST_ZFS && sa_attr_count == 0) | |
844 | sa_attr_count += sa_legacy_attr_count; | |
845 | ||
846 | /* Allocate attribute numbers for attributes that aren't registered */ | |
847 | for (i = 0; i != count; i++) { | |
848 | boolean_t found = B_FALSE; | |
849 | int j; | |
850 | ||
851 | if (ostype == DMU_OST_ZFS) { | |
852 | for (j = 0; j != sa_legacy_attr_count; j++) { | |
853 | if (strcmp(reg_attrs[i].sa_name, | |
854 | sa_legacy_attrs[j].sa_name) == 0) { | |
855 | sa->sa_user_table[i] = | |
856 | sa_legacy_attrs[j].sa_attr; | |
857 | found = B_TRUE; | |
858 | } | |
859 | } | |
860 | } | |
861 | if (found) | |
862 | continue; | |
863 | ||
864 | if (sa->sa_reg_attr_obj) | |
865 | error = zap_lookup(os, sa->sa_reg_attr_obj, | |
866 | reg_attrs[i].sa_name, 8, 1, &attr_value); | |
867 | else | |
868 | error = ENOENT; | |
869 | switch (error) { | |
428870ff BB |
870 | case ENOENT: |
871 | sa->sa_user_table[i] = (sa_attr_type_t)sa_attr_count; | |
872 | sa_attr_count++; | |
873 | break; | |
874 | case 0: | |
875 | sa->sa_user_table[i] = ATTR_NUM(attr_value); | |
876 | break; | |
572e2857 BB |
877 | default: |
878 | goto bail; | |
428870ff BB |
879 | } |
880 | } | |
881 | ||
572e2857 BB |
882 | sa->sa_num_attrs = sa_attr_count; |
883 | tb = sa->sa_attr_table = | |
428870ff BB |
884 | kmem_zalloc(sizeof (sa_attr_table_t) * sa_attr_count, KM_SLEEP); |
885 | ||
886 | /* | |
887 | * Attribute table is constructed from requested attribute list, | |
888 | * previously foreign registered attributes, and also the legacy | |
889 | * ZPL set of attributes. | |
890 | */ | |
891 | ||
892 | if (sa->sa_reg_attr_obj) { | |
893 | for (zap_cursor_init(&zc, os, sa->sa_reg_attr_obj); | |
572e2857 | 894 | (error = zap_cursor_retrieve(&zc, &za)) == 0; |
428870ff BB |
895 | zap_cursor_advance(&zc)) { |
896 | uint64_t value; | |
897 | value = za.za_first_integer; | |
898 | ||
899 | registered_count++; | |
900 | tb[ATTR_NUM(value)].sa_attr = ATTR_NUM(value); | |
901 | tb[ATTR_NUM(value)].sa_length = ATTR_LENGTH(value); | |
902 | tb[ATTR_NUM(value)].sa_byteswap = ATTR_BSWAP(value); | |
903 | tb[ATTR_NUM(value)].sa_registered = B_TRUE; | |
904 | ||
905 | if (tb[ATTR_NUM(value)].sa_name) { | |
906 | continue; | |
907 | } | |
908 | tb[ATTR_NUM(value)].sa_name = | |
909 | kmem_zalloc(strlen(za.za_name) +1, KM_SLEEP); | |
910 | (void) strlcpy(tb[ATTR_NUM(value)].sa_name, za.za_name, | |
911 | strlen(za.za_name) +1); | |
912 | } | |
913 | zap_cursor_fini(&zc); | |
572e2857 BB |
914 | /* |
915 | * Make sure we processed the correct number of registered | |
916 | * attributes | |
917 | */ | |
918 | if (registered_count != sa_reg_count) { | |
919 | ASSERT(error != 0); | |
920 | goto bail; | |
921 | } | |
922 | ||
428870ff BB |
923 | } |
924 | ||
925 | if (ostype == DMU_OST_ZFS) { | |
926 | for (i = 0; i != sa_legacy_attr_count; i++) { | |
927 | if (tb[i].sa_name) | |
928 | continue; | |
929 | tb[i].sa_attr = sa_legacy_attrs[i].sa_attr; | |
930 | tb[i].sa_length = sa_legacy_attrs[i].sa_length; | |
931 | tb[i].sa_byteswap = sa_legacy_attrs[i].sa_byteswap; | |
932 | tb[i].sa_registered = B_FALSE; | |
933 | tb[i].sa_name = | |
934 | kmem_zalloc(strlen(sa_legacy_attrs[i].sa_name) +1, | |
935 | KM_SLEEP); | |
936 | (void) strlcpy(tb[i].sa_name, | |
937 | sa_legacy_attrs[i].sa_name, | |
938 | strlen(sa_legacy_attrs[i].sa_name) + 1); | |
939 | } | |
940 | } | |
941 | ||
942 | for (i = 0; i != count; i++) { | |
943 | sa_attr_type_t attr_id; | |
944 | ||
945 | attr_id = sa->sa_user_table[i]; | |
946 | if (tb[attr_id].sa_name) | |
947 | continue; | |
948 | ||
949 | tb[attr_id].sa_length = reg_attrs[i].sa_length; | |
950 | tb[attr_id].sa_byteswap = reg_attrs[i].sa_byteswap; | |
951 | tb[attr_id].sa_attr = attr_id; | |
952 | tb[attr_id].sa_name = | |
953 | kmem_zalloc(strlen(reg_attrs[i].sa_name) + 1, KM_SLEEP); | |
954 | (void) strlcpy(tb[attr_id].sa_name, reg_attrs[i].sa_name, | |
955 | strlen(reg_attrs[i].sa_name) + 1); | |
956 | } | |
957 | ||
572e2857 | 958 | sa->sa_need_attr_registration = |
428870ff | 959 | (sa_attr_count != registered_count); |
572e2857 BB |
960 | |
961 | return (0); | |
962 | bail: | |
963 | kmem_free(sa->sa_user_table, count * sizeof (sa_attr_type_t)); | |
964 | sa->sa_user_table = NULL; | |
965 | sa_free_attr_table(sa); | |
966 | return ((error != 0) ? error : EINVAL); | |
428870ff BB |
967 | } |
968 | ||
572e2857 BB |
969 | int |
970 | sa_setup(objset_t *os, uint64_t sa_obj, sa_attr_reg_t *reg_attrs, int count, | |
971 | sa_attr_type_t **user_table) | |
428870ff BB |
972 | { |
973 | zap_cursor_t zc; | |
974 | zap_attribute_t za; | |
975 | sa_os_t *sa; | |
976 | dmu_objset_type_t ostype = dmu_objset_type(os); | |
977 | sa_attr_type_t *tb; | |
572e2857 | 978 | int error; |
428870ff BB |
979 | |
980 | mutex_enter(&os->os_lock); | |
981 | if (os->os_sa) { | |
982 | mutex_enter(&os->os_sa->sa_lock); | |
983 | mutex_exit(&os->os_lock); | |
984 | tb = os->os_sa->sa_user_table; | |
985 | mutex_exit(&os->os_sa->sa_lock); | |
572e2857 BB |
986 | *user_table = tb; |
987 | return (0); | |
428870ff BB |
988 | } |
989 | ||
990 | sa = kmem_zalloc(sizeof (sa_os_t), KM_SLEEP); | |
991 | mutex_init(&sa->sa_lock, NULL, MUTEX_DEFAULT, NULL); | |
992 | sa->sa_master_obj = sa_obj; | |
993 | ||
572e2857 | 994 | os->os_sa = sa; |
428870ff BB |
995 | mutex_enter(&sa->sa_lock); |
996 | mutex_exit(&os->os_lock); | |
997 | avl_create(&sa->sa_layout_num_tree, layout_num_compare, | |
998 | sizeof (sa_lot_t), offsetof(sa_lot_t, lot_num_node)); | |
999 | avl_create(&sa->sa_layout_hash_tree, layout_hash_compare, | |
1000 | sizeof (sa_lot_t), offsetof(sa_lot_t, lot_hash_node)); | |
1001 | ||
1002 | if (sa_obj) { | |
428870ff BB |
1003 | error = zap_lookup(os, sa_obj, SA_LAYOUTS, |
1004 | 8, 1, &sa->sa_layout_attr_obj); | |
572e2857 BB |
1005 | if (error != 0 && error != ENOENT) |
1006 | goto fail; | |
428870ff BB |
1007 | error = zap_lookup(os, sa_obj, SA_REGISTRY, |
1008 | 8, 1, &sa->sa_reg_attr_obj); | |
572e2857 BB |
1009 | if (error != 0 && error != ENOENT) |
1010 | goto fail; | |
428870ff BB |
1011 | } |
1012 | ||
572e2857 BB |
1013 | if ((error = sa_attr_table_setup(os, reg_attrs, count)) != 0) |
1014 | goto fail; | |
428870ff BB |
1015 | |
1016 | if (sa->sa_layout_attr_obj != 0) { | |
572e2857 BB |
1017 | uint64_t layout_count; |
1018 | ||
1019 | error = zap_count(os, sa->sa_layout_attr_obj, | |
1020 | &layout_count); | |
1021 | ||
1022 | /* | |
1023 | * Layout number count should be > 0 | |
1024 | */ | |
1025 | if (error || (error == 0 && layout_count == 0)) { | |
1026 | if (error == 0) | |
1027 | error = EINVAL; | |
1028 | goto fail; | |
1029 | } | |
1030 | ||
428870ff | 1031 | for (zap_cursor_init(&zc, os, sa->sa_layout_attr_obj); |
572e2857 | 1032 | (error = zap_cursor_retrieve(&zc, &za)) == 0; |
428870ff BB |
1033 | zap_cursor_advance(&zc)) { |
1034 | sa_attr_type_t *lot_attrs; | |
1035 | uint64_t lot_num; | |
1036 | ||
1037 | lot_attrs = kmem_zalloc(sizeof (sa_attr_type_t) * | |
1038 | za.za_num_integers, KM_SLEEP); | |
1039 | ||
572e2857 BB |
1040 | if ((error = (zap_lookup(os, sa->sa_layout_attr_obj, |
1041 | za.za_name, 2, za.za_num_integers, | |
1042 | lot_attrs))) != 0) { | |
1043 | kmem_free(lot_attrs, sizeof (sa_attr_type_t) * | |
1044 | za.za_num_integers); | |
1045 | break; | |
1046 | } | |
428870ff BB |
1047 | VERIFY(ddi_strtoull(za.za_name, NULL, 10, |
1048 | (unsigned long long *)&lot_num) == 0); | |
1049 | ||
1050 | (void) sa_add_layout_entry(os, lot_attrs, | |
1051 | za.za_num_integers, lot_num, | |
1052 | sa_layout_info_hash(lot_attrs, | |
1053 | za.za_num_integers), B_FALSE, NULL); | |
1054 | kmem_free(lot_attrs, sizeof (sa_attr_type_t) * | |
1055 | za.za_num_integers); | |
1056 | } | |
1057 | zap_cursor_fini(&zc); | |
572e2857 BB |
1058 | |
1059 | /* | |
1060 | * Make sure layout count matches number of entries added | |
1061 | * to AVL tree | |
1062 | */ | |
1063 | if (avl_numnodes(&sa->sa_layout_num_tree) != layout_count) { | |
1064 | ASSERT(error != 0); | |
1065 | goto fail; | |
1066 | } | |
428870ff BB |
1067 | } |
1068 | ||
1069 | /* Add special layout number for old ZNODES */ | |
1070 | if (ostype == DMU_OST_ZFS) { | |
1071 | (void) sa_add_layout_entry(os, sa_legacy_zpl_layout, | |
1072 | sa_legacy_attr_count, 0, | |
1073 | sa_layout_info_hash(sa_legacy_zpl_layout, | |
1074 | sa_legacy_attr_count), B_FALSE, NULL); | |
1075 | ||
1076 | (void) sa_add_layout_entry(os, sa_dummy_zpl_layout, 0, 1, | |
1077 | 0, B_FALSE, NULL); | |
1078 | } | |
572e2857 | 1079 | *user_table = os->os_sa->sa_user_table; |
428870ff | 1080 | mutex_exit(&sa->sa_lock); |
572e2857 BB |
1081 | return (0); |
1082 | fail: | |
1083 | os->os_sa = NULL; | |
1084 | sa_free_attr_table(sa); | |
1085 | if (sa->sa_user_table) | |
1086 | kmem_free(sa->sa_user_table, sa->sa_user_table_sz); | |
1087 | mutex_exit(&sa->sa_lock); | |
1088 | kmem_free(sa, sizeof (sa_os_t)); | |
1089 | return ((error == ECKSUM) ? EIO : error); | |
428870ff BB |
1090 | } |
1091 | ||
1092 | void | |
1093 | sa_tear_down(objset_t *os) | |
1094 | { | |
1095 | sa_os_t *sa = os->os_sa; | |
1096 | sa_lot_t *layout; | |
1097 | void *cookie; | |
428870ff BB |
1098 | |
1099 | kmem_free(sa->sa_user_table, sa->sa_user_table_sz); | |
1100 | ||
1101 | /* Free up attr table */ | |
1102 | ||
572e2857 | 1103 | sa_free_attr_table(sa); |
428870ff BB |
1104 | |
1105 | cookie = NULL; | |
1106 | while (layout = avl_destroy_nodes(&sa->sa_layout_hash_tree, &cookie)) { | |
1107 | sa_idx_tab_t *tab; | |
1108 | while (tab = list_head(&layout->lot_idx_tab)) { | |
1109 | ASSERT(refcount_count(&tab->sa_refcount)); | |
1110 | sa_idx_tab_rele(os, tab); | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | cookie = NULL; | |
1115 | while (layout = avl_destroy_nodes(&sa->sa_layout_num_tree, &cookie)) { | |
1116 | kmem_free(layout->lot_attrs, | |
1117 | sizeof (sa_attr_type_t) * layout->lot_attr_count); | |
1118 | kmem_free(layout, sizeof (sa_lot_t)); | |
1119 | } | |
1120 | ||
1121 | avl_destroy(&sa->sa_layout_hash_tree); | |
1122 | avl_destroy(&sa->sa_layout_num_tree); | |
1123 | ||
1124 | kmem_free(sa, sizeof (sa_os_t)); | |
1125 | os->os_sa = NULL; | |
1126 | } | |
1127 | ||
1128 | void | |
1129 | sa_build_idx_tab(void *hdr, void *attr_addr, sa_attr_type_t attr, | |
1130 | uint16_t length, int length_idx, boolean_t var_length, void *userp) | |
1131 | { | |
1132 | sa_idx_tab_t *idx_tab = userp; | |
1133 | ||
1134 | if (var_length) { | |
1135 | ASSERT(idx_tab->sa_variable_lengths); | |
1136 | idx_tab->sa_variable_lengths[length_idx] = length; | |
1137 | } | |
1138 | TOC_ATTR_ENCODE(idx_tab->sa_idx_tab[attr], length_idx, | |
1139 | (uint32_t)((uintptr_t)attr_addr - (uintptr_t)hdr)); | |
1140 | } | |
1141 | ||
1142 | static void | |
1143 | sa_attr_iter(objset_t *os, sa_hdr_phys_t *hdr, dmu_object_type_t type, | |
1144 | sa_iterfunc_t func, sa_lot_t *tab, void *userp) | |
1145 | { | |
1146 | void *data_start; | |
1147 | sa_lot_t *tb = tab; | |
1148 | sa_lot_t search; | |
1149 | avl_index_t loc; | |
1150 | sa_os_t *sa = os->os_sa; | |
1151 | int i; | |
1152 | uint16_t *length_start = NULL; | |
1153 | uint8_t length_idx = 0; | |
1154 | ||
1155 | if (tab == NULL) { | |
1156 | search.lot_num = SA_LAYOUT_NUM(hdr, type); | |
1157 | tb = avl_find(&sa->sa_layout_num_tree, &search, &loc); | |
1158 | ASSERT(tb); | |
1159 | } | |
1160 | ||
1161 | if (IS_SA_BONUSTYPE(type)) { | |
1162 | data_start = (void *)P2ROUNDUP(((uintptr_t)hdr + | |
1163 | offsetof(sa_hdr_phys_t, sa_lengths) + | |
1164 | (sizeof (uint16_t) * tb->lot_var_sizes)), 8); | |
1165 | length_start = hdr->sa_lengths; | |
1166 | } else { | |
1167 | data_start = hdr; | |
1168 | } | |
1169 | ||
1170 | for (i = 0; i != tb->lot_attr_count; i++) { | |
1171 | int attr_length, reg_length; | |
1172 | uint8_t idx_len; | |
1173 | ||
1174 | reg_length = sa->sa_attr_table[tb->lot_attrs[i]].sa_length; | |
1175 | if (reg_length) { | |
1176 | attr_length = reg_length; | |
1177 | idx_len = 0; | |
1178 | } else { | |
1179 | attr_length = length_start[length_idx]; | |
1180 | idx_len = length_idx++; | |
1181 | } | |
1182 | ||
1183 | func(hdr, data_start, tb->lot_attrs[i], attr_length, | |
1184 | idx_len, reg_length == 0 ? B_TRUE : B_FALSE, userp); | |
1185 | ||
1186 | data_start = (void *)P2ROUNDUP(((uintptr_t)data_start + | |
1187 | attr_length), 8); | |
1188 | } | |
1189 | } | |
1190 | ||
1191 | /*ARGSUSED*/ | |
1192 | void | |
1193 | sa_byteswap_cb(void *hdr, void *attr_addr, sa_attr_type_t attr, | |
1194 | uint16_t length, int length_idx, boolean_t variable_length, void *userp) | |
1195 | { | |
1196 | sa_handle_t *hdl = userp; | |
1197 | sa_os_t *sa = hdl->sa_os->os_sa; | |
1198 | ||
1199 | sa_bswap_table[sa->sa_attr_table[attr].sa_byteswap](attr_addr, length); | |
1200 | } | |
1201 | ||
1202 | void | |
1203 | sa_byteswap(sa_handle_t *hdl, sa_buf_type_t buftype) | |
1204 | { | |
1205 | sa_hdr_phys_t *sa_hdr_phys = SA_GET_HDR(hdl, buftype); | |
1206 | dmu_buf_impl_t *db; | |
1207 | sa_os_t *sa = hdl->sa_os->os_sa; | |
1208 | int num_lengths = 1; | |
1209 | int i; | |
1210 | ||
1211 | ASSERT(MUTEX_HELD(&sa->sa_lock)); | |
1212 | if (sa_hdr_phys->sa_magic == SA_MAGIC) | |
1213 | return; | |
1214 | ||
1215 | db = SA_GET_DB(hdl, buftype); | |
1216 | ||
1217 | if (buftype == SA_SPILL) { | |
1218 | arc_release(db->db_buf, NULL); | |
1219 | arc_buf_thaw(db->db_buf); | |
1220 | } | |
1221 | ||
1222 | sa_hdr_phys->sa_magic = BSWAP_32(sa_hdr_phys->sa_magic); | |
1223 | sa_hdr_phys->sa_layout_info = BSWAP_16(sa_hdr_phys->sa_layout_info); | |
1224 | ||
1225 | /* | |
1226 | * Determine number of variable lenghts in header | |
1227 | * The standard 8 byte header has one for free and a | |
1228 | * 16 byte header would have 4 + 1; | |
1229 | */ | |
1230 | if (SA_HDR_SIZE(sa_hdr_phys) > 8) | |
1231 | num_lengths += (SA_HDR_SIZE(sa_hdr_phys) - 8) >> 1; | |
1232 | for (i = 0; i != num_lengths; i++) | |
1233 | sa_hdr_phys->sa_lengths[i] = | |
1234 | BSWAP_16(sa_hdr_phys->sa_lengths[i]); | |
1235 | ||
1236 | sa_attr_iter(hdl->sa_os, sa_hdr_phys, DMU_OT_SA, | |
1237 | sa_byteswap_cb, NULL, hdl); | |
1238 | ||
1239 | if (buftype == SA_SPILL) | |
1240 | arc_buf_freeze(((dmu_buf_impl_t *)hdl->sa_spill)->db_buf); | |
1241 | } | |
1242 | ||
1243 | static int | |
1244 | sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype) | |
1245 | { | |
1246 | sa_hdr_phys_t *sa_hdr_phys; | |
1247 | dmu_buf_impl_t *db = SA_GET_DB(hdl, buftype); | |
1248 | dmu_object_type_t bonustype = SA_BONUSTYPE_FROM_DB(db); | |
1249 | sa_os_t *sa = hdl->sa_os->os_sa; | |
1250 | sa_idx_tab_t *idx_tab; | |
1251 | ||
1252 | sa_hdr_phys = SA_GET_HDR(hdl, buftype); | |
1253 | ||
1254 | mutex_enter(&sa->sa_lock); | |
1255 | ||
1256 | /* Do we need to byteswap? */ | |
1257 | ||
1258 | /* only check if not old znode */ | |
1259 | if (IS_SA_BONUSTYPE(bonustype) && sa_hdr_phys->sa_magic != SA_MAGIC && | |
1260 | sa_hdr_phys->sa_magic != 0) { | |
1261 | VERIFY(BSWAP_32(sa_hdr_phys->sa_magic) == SA_MAGIC); | |
1262 | sa_byteswap(hdl, buftype); | |
1263 | } | |
1264 | ||
1265 | idx_tab = sa_find_idx_tab(hdl->sa_os, bonustype, sa_hdr_phys); | |
1266 | ||
1267 | if (buftype == SA_BONUS) | |
1268 | hdl->sa_bonus_tab = idx_tab; | |
1269 | else | |
1270 | hdl->sa_spill_tab = idx_tab; | |
1271 | ||
1272 | mutex_exit(&sa->sa_lock); | |
1273 | return (0); | |
1274 | } | |
1275 | ||
1276 | /*ARGSUSED*/ | |
1277 | void | |
1278 | sa_evict(dmu_buf_t *db, void *sap) | |
1279 | { | |
1280 | panic("evicting sa dbuf %p\n", (void *)db); | |
1281 | } | |
1282 | ||
1283 | static void | |
1284 | sa_idx_tab_rele(objset_t *os, void *arg) | |
1285 | { | |
1286 | sa_os_t *sa = os->os_sa; | |
1287 | sa_idx_tab_t *idx_tab = arg; | |
1288 | ||
1289 | if (idx_tab == NULL) | |
1290 | return; | |
1291 | ||
1292 | mutex_enter(&sa->sa_lock); | |
1293 | if (refcount_remove(&idx_tab->sa_refcount, NULL) == 0) { | |
1294 | list_remove(&idx_tab->sa_layout->lot_idx_tab, idx_tab); | |
1295 | if (idx_tab->sa_variable_lengths) | |
1296 | kmem_free(idx_tab->sa_variable_lengths, | |
1297 | sizeof (uint16_t) * | |
1298 | idx_tab->sa_layout->lot_var_sizes); | |
1299 | refcount_destroy(&idx_tab->sa_refcount); | |
1300 | kmem_free(idx_tab->sa_idx_tab, | |
1301 | sizeof (uint32_t) * sa->sa_num_attrs); | |
1302 | kmem_free(idx_tab, sizeof (sa_idx_tab_t)); | |
1303 | } | |
1304 | mutex_exit(&sa->sa_lock); | |
1305 | } | |
1306 | ||
1307 | static void | |
1308 | sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab) | |
1309 | { | |
1310 | sa_os_t *sa = os->os_sa; | |
1311 | ||
1312 | ASSERT(MUTEX_HELD(&sa->sa_lock)); | |
1313 | (void) refcount_add(&idx_tab->sa_refcount, NULL); | |
1314 | } | |
1315 | ||
1316 | void | |
1317 | sa_handle_destroy(sa_handle_t *hdl) | |
1318 | { | |
1319 | mutex_enter(&hdl->sa_lock); | |
1320 | (void) dmu_buf_update_user((dmu_buf_t *)hdl->sa_bonus, hdl, | |
1321 | NULL, NULL, NULL); | |
1322 | ||
1323 | if (hdl->sa_bonus_tab) { | |
1324 | sa_idx_tab_rele(hdl->sa_os, hdl->sa_bonus_tab); | |
1325 | hdl->sa_bonus_tab = NULL; | |
1326 | } | |
1327 | if (hdl->sa_spill_tab) { | |
1328 | sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab); | |
1329 | hdl->sa_spill_tab = NULL; | |
1330 | } | |
1331 | ||
1332 | dmu_buf_rele(hdl->sa_bonus, NULL); | |
1333 | ||
1334 | if (hdl->sa_spill) | |
1335 | dmu_buf_rele((dmu_buf_t *)hdl->sa_spill, NULL); | |
1336 | mutex_exit(&hdl->sa_lock); | |
1337 | ||
1338 | kmem_cache_free(sa_cache, hdl); | |
1339 | } | |
1340 | ||
1341 | int | |
1342 | sa_handle_get_from_db(objset_t *os, dmu_buf_t *db, void *userp, | |
1343 | sa_handle_type_t hdl_type, sa_handle_t **handlepp) | |
1344 | { | |
1345 | int error = 0; | |
1346 | dmu_object_info_t doi; | |
1347 | sa_handle_t *handle; | |
1348 | ||
1349 | #ifdef ZFS_DEBUG | |
1350 | dmu_object_info_from_db(db, &doi); | |
1351 | ASSERT(doi.doi_bonus_type == DMU_OT_SA || | |
1352 | doi.doi_bonus_type == DMU_OT_ZNODE); | |
1353 | #endif | |
1354 | /* find handle, if it exists */ | |
1355 | /* if one doesn't exist then create a new one, and initialize it */ | |
1356 | ||
1357 | handle = (hdl_type == SA_HDL_SHARED) ? dmu_buf_get_user(db) : NULL; | |
1358 | if (handle == NULL) { | |
1359 | sa_handle_t *newhandle; | |
1360 | handle = kmem_cache_alloc(sa_cache, KM_SLEEP); | |
1361 | handle->sa_userp = userp; | |
1362 | handle->sa_bonus = db; | |
1363 | handle->sa_os = os; | |
1364 | handle->sa_spill = NULL; | |
1365 | ||
1366 | error = sa_build_index(handle, SA_BONUS); | |
1367 | newhandle = (hdl_type == SA_HDL_SHARED) ? | |
1368 | dmu_buf_set_user_ie(db, handle, | |
1369 | NULL, sa_evict) : NULL; | |
1370 | ||
1371 | if (newhandle != NULL) { | |
1372 | kmem_cache_free(sa_cache, handle); | |
1373 | handle = newhandle; | |
1374 | } | |
1375 | } | |
1376 | *handlepp = handle; | |
1377 | ||
1378 | return (error); | |
1379 | } | |
1380 | ||
1381 | int | |
1382 | sa_handle_get(objset_t *objset, uint64_t objid, void *userp, | |
1383 | sa_handle_type_t hdl_type, sa_handle_t **handlepp) | |
1384 | { | |
1385 | dmu_buf_t *db; | |
1386 | int error; | |
1387 | ||
1388 | if (error = dmu_bonus_hold(objset, objid, NULL, &db)) | |
1389 | return (error); | |
1390 | ||
1391 | return (sa_handle_get_from_db(objset, db, userp, hdl_type, | |
1392 | handlepp)); | |
1393 | } | |
1394 | ||
1395 | int | |
1396 | sa_buf_hold(objset_t *objset, uint64_t obj_num, void *tag, dmu_buf_t **db) | |
1397 | { | |
1398 | return (dmu_bonus_hold(objset, obj_num, tag, db)); | |
1399 | } | |
1400 | ||
1401 | void | |
1402 | sa_buf_rele(dmu_buf_t *db, void *tag) | |
1403 | { | |
1404 | dmu_buf_rele(db, tag); | |
1405 | } | |
1406 | ||
1407 | int | |
1408 | sa_lookup_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count) | |
1409 | { | |
1410 | ASSERT(hdl); | |
1411 | ASSERT(MUTEX_HELD(&hdl->sa_lock)); | |
1412 | return (sa_attr_op(hdl, bulk, count, SA_LOOKUP, NULL)); | |
1413 | } | |
1414 | ||
1415 | int | |
1416 | sa_lookup(sa_handle_t *hdl, sa_attr_type_t attr, void *buf, uint32_t buflen) | |
1417 | { | |
1418 | int error; | |
1419 | sa_bulk_attr_t bulk; | |
1420 | ||
1421 | bulk.sa_attr = attr; | |
1422 | bulk.sa_data = buf; | |
1423 | bulk.sa_length = buflen; | |
1424 | bulk.sa_data_func = NULL; | |
1425 | ||
1426 | ASSERT(hdl); | |
1427 | mutex_enter(&hdl->sa_lock); | |
1428 | error = sa_lookup_impl(hdl, &bulk, 1); | |
1429 | mutex_exit(&hdl->sa_lock); | |
1430 | return (error); | |
1431 | } | |
1432 | ||
1433 | #ifdef _KERNEL | |
1434 | int | |
1435 | sa_lookup_uio(sa_handle_t *hdl, sa_attr_type_t attr, uio_t *uio) | |
1436 | { | |
1437 | int error; | |
1438 | sa_bulk_attr_t bulk; | |
1439 | ||
1440 | bulk.sa_data = NULL; | |
1441 | bulk.sa_attr = attr; | |
1442 | bulk.sa_data_func = NULL; | |
1443 | ||
1444 | ASSERT(hdl); | |
1445 | ||
1446 | mutex_enter(&hdl->sa_lock); | |
572e2857 | 1447 | if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) == 0) { |
428870ff BB |
1448 | error = uiomove((void *)bulk.sa_addr, MIN(bulk.sa_size, |
1449 | uio->uio_resid), UIO_READ, uio); | |
428870ff BB |
1450 | } |
1451 | mutex_exit(&hdl->sa_lock); | |
1452 | return (error); | |
1453 | ||
1454 | } | |
1455 | #endif | |
1456 | ||
428870ff BB |
1457 | void * |
1458 | sa_find_idx_tab(objset_t *os, dmu_object_type_t bonustype, void *data) | |
1459 | { | |
1460 | sa_idx_tab_t *idx_tab; | |
1461 | sa_hdr_phys_t *hdr = (sa_hdr_phys_t *)data; | |
1462 | sa_os_t *sa = os->os_sa; | |
1463 | sa_lot_t *tb, search; | |
1464 | avl_index_t loc; | |
1465 | ||
1466 | /* | |
1467 | * Deterimine layout number. If SA node and header == 0 then | |
1468 | * force the index table to the dummy "1" empty layout. | |
1469 | * | |
1470 | * The layout number would only be zero for a newly created file | |
1471 | * that has not added any attributes yet, or with crypto enabled which | |
1472 | * doesn't write any attributes to the bonus buffer. | |
1473 | */ | |
1474 | ||
1475 | search.lot_num = SA_LAYOUT_NUM(hdr, bonustype); | |
1476 | ||
1477 | tb = avl_find(&sa->sa_layout_num_tree, &search, &loc); | |
1478 | ||
1479 | /* Verify header size is consistent with layout information */ | |
1480 | ASSERT(tb); | |
d6320ddb BB |
1481 | ASSERT((IS_SA_BONUSTYPE(bonustype) && |
1482 | SA_HDR_SIZE_MATCH_LAYOUT(hdr, tb)) || !IS_SA_BONUSTYPE(bonustype) || | |
428870ff BB |
1483 | (IS_SA_BONUSTYPE(bonustype) && hdr->sa_layout_info == 0)); |
1484 | ||
1485 | /* | |
1486 | * See if any of the already existing TOC entries can be reused? | |
1487 | */ | |
1488 | ||
1489 | for (idx_tab = list_head(&tb->lot_idx_tab); idx_tab; | |
1490 | idx_tab = list_next(&tb->lot_idx_tab, idx_tab)) { | |
1491 | boolean_t valid_idx = B_TRUE; | |
1492 | int i; | |
1493 | ||
1494 | if (tb->lot_var_sizes != 0 && | |
1495 | idx_tab->sa_variable_lengths != NULL) { | |
1496 | for (i = 0; i != tb->lot_var_sizes; i++) { | |
1497 | if (hdr->sa_lengths[i] != | |
1498 | idx_tab->sa_variable_lengths[i]) { | |
1499 | valid_idx = B_FALSE; | |
1500 | break; | |
1501 | } | |
1502 | } | |
1503 | } | |
1504 | if (valid_idx) { | |
1505 | sa_idx_tab_hold(os, idx_tab); | |
1506 | return (idx_tab); | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | /* No such luck, create a new entry */ | |
1511 | idx_tab = kmem_zalloc(sizeof (sa_idx_tab_t), KM_SLEEP); | |
1512 | idx_tab->sa_idx_tab = | |
1513 | kmem_zalloc(sizeof (uint32_t) * sa->sa_num_attrs, KM_SLEEP); | |
1514 | idx_tab->sa_layout = tb; | |
1515 | refcount_create(&idx_tab->sa_refcount); | |
1516 | if (tb->lot_var_sizes) | |
1517 | idx_tab->sa_variable_lengths = kmem_alloc(sizeof (uint16_t) * | |
1518 | tb->lot_var_sizes, KM_SLEEP); | |
1519 | ||
1520 | sa_attr_iter(os, hdr, bonustype, sa_build_idx_tab, | |
1521 | tb, idx_tab); | |
1522 | sa_idx_tab_hold(os, idx_tab); /* one hold for consumer */ | |
1523 | sa_idx_tab_hold(os, idx_tab); /* one for layout */ | |
1524 | list_insert_tail(&tb->lot_idx_tab, idx_tab); | |
1525 | return (idx_tab); | |
1526 | } | |
1527 | ||
1528 | void | |
1529 | sa_default_locator(void **dataptr, uint32_t *len, uint32_t total_len, | |
1530 | boolean_t start, void *userdata) | |
1531 | { | |
1532 | ASSERT(start); | |
1533 | ||
1534 | *dataptr = userdata; | |
1535 | *len = total_len; | |
1536 | } | |
1537 | ||
1538 | static void | |
1539 | sa_attr_register_sync(sa_handle_t *hdl, dmu_tx_t *tx) | |
1540 | { | |
1541 | uint64_t attr_value = 0; | |
1542 | sa_os_t *sa = hdl->sa_os->os_sa; | |
1543 | sa_attr_table_t *tb = sa->sa_attr_table; | |
1544 | int i; | |
1545 | ||
1546 | mutex_enter(&sa->sa_lock); | |
1547 | ||
b8864a23 | 1548 | if (!sa->sa_need_attr_registration || sa->sa_master_obj == 0) { |
428870ff BB |
1549 | mutex_exit(&sa->sa_lock); |
1550 | return; | |
1551 | } | |
1552 | ||
b8864a23 | 1553 | if (sa->sa_reg_attr_obj == 0) { |
428870ff BB |
1554 | sa->sa_reg_attr_obj = zap_create(hdl->sa_os, |
1555 | DMU_OT_SA_ATTR_REGISTRATION, DMU_OT_NONE, 0, tx); | |
572e2857 BB |
1556 | VERIFY(zap_add(hdl->sa_os, sa->sa_master_obj, |
1557 | SA_REGISTRY, 8, 1, &sa->sa_reg_attr_obj, tx) == 0); | |
428870ff BB |
1558 | } |
1559 | for (i = 0; i != sa->sa_num_attrs; i++) { | |
1560 | if (sa->sa_attr_table[i].sa_registered) | |
1561 | continue; | |
1562 | ATTR_ENCODE(attr_value, tb[i].sa_attr, tb[i].sa_length, | |
1563 | tb[i].sa_byteswap); | |
1564 | VERIFY(0 == zap_update(hdl->sa_os, sa->sa_reg_attr_obj, | |
1565 | tb[i].sa_name, 8, 1, &attr_value, tx)); | |
1566 | tb[i].sa_registered = B_TRUE; | |
1567 | } | |
1568 | sa->sa_need_attr_registration = B_FALSE; | |
1569 | mutex_exit(&sa->sa_lock); | |
1570 | } | |
1571 | ||
1572 | /* | |
1573 | * Replace all attributes with attributes specified in template. | |
1574 | * If dnode had a spill buffer then those attributes will be | |
1575 | * also be replaced, possibly with just an empty spill block | |
1576 | * | |
1577 | * This interface is intended to only be used for bulk adding of | |
1578 | * attributes for a new file. It will also be used by the ZPL | |
1579 | * when converting and old formatted znode to native SA support. | |
1580 | */ | |
1581 | int | |
1582 | sa_replace_all_by_template_locked(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, | |
1583 | int attr_count, dmu_tx_t *tx) | |
1584 | { | |
1585 | sa_os_t *sa = hdl->sa_os->os_sa; | |
1586 | ||
1587 | if (sa->sa_need_attr_registration) | |
1588 | sa_attr_register_sync(hdl, tx); | |
1589 | return (sa_build_layouts(hdl, attr_desc, attr_count, tx)); | |
1590 | } | |
1591 | ||
1592 | int | |
1593 | sa_replace_all_by_template(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, | |
1594 | int attr_count, dmu_tx_t *tx) | |
1595 | { | |
1596 | int error; | |
1597 | ||
1598 | mutex_enter(&hdl->sa_lock); | |
1599 | error = sa_replace_all_by_template_locked(hdl, attr_desc, | |
1600 | attr_count, tx); | |
1601 | mutex_exit(&hdl->sa_lock); | |
1602 | return (error); | |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * add/remove/replace a single attribute and then rewrite the entire set | |
1607 | * of attributes. | |
1608 | */ | |
1609 | static int | |
1610 | sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr, | |
1611 | sa_data_op_t action, sa_data_locator_t *locator, void *datastart, | |
1612 | uint16_t buflen, dmu_tx_t *tx) | |
1613 | { | |
1614 | sa_os_t *sa = hdl->sa_os->os_sa; | |
572e2857 BB |
1615 | dmu_buf_impl_t *db = (dmu_buf_impl_t *)hdl->sa_bonus; |
1616 | dnode_t *dn; | |
428870ff BB |
1617 | sa_bulk_attr_t *attr_desc; |
1618 | void *old_data[2]; | |
1619 | int bonus_attr_count = 0; | |
1620 | int bonus_data_size, spill_data_size; | |
1621 | int spill_attr_count = 0; | |
1622 | int error; | |
1623 | uint16_t length; | |
1624 | int i, j, k, length_idx; | |
1625 | sa_hdr_phys_t *hdr; | |
1626 | sa_idx_tab_t *idx_tab; | |
1627 | int attr_count; | |
1628 | int count; | |
1629 | ||
1630 | ASSERT(MUTEX_HELD(&hdl->sa_lock)); | |
1631 | ||
1632 | /* First make of copy of the old data */ | |
1633 | ||
572e2857 BB |
1634 | DB_DNODE_ENTER(db); |
1635 | dn = DB_DNODE(db); | |
1636 | if (dn->dn_bonuslen != 0) { | |
428870ff BB |
1637 | bonus_data_size = hdl->sa_bonus->db_size; |
1638 | old_data[0] = kmem_alloc(bonus_data_size, KM_SLEEP); | |
1639 | bcopy(hdl->sa_bonus->db_data, old_data[0], | |
1640 | hdl->sa_bonus->db_size); | |
1641 | bonus_attr_count = hdl->sa_bonus_tab->sa_layout->lot_attr_count; | |
1642 | } else { | |
1643 | old_data[0] = NULL; | |
1644 | } | |
572e2857 | 1645 | DB_DNODE_EXIT(db); |
428870ff BB |
1646 | |
1647 | /* Bring spill buffer online if it isn't currently */ | |
1648 | ||
572e2857 | 1649 | if ((error = sa_get_spill(hdl)) == 0) { |
428870ff BB |
1650 | spill_data_size = hdl->sa_spill->db_size; |
1651 | old_data[1] = kmem_alloc(spill_data_size, KM_SLEEP); | |
1652 | bcopy(hdl->sa_spill->db_data, old_data[1], | |
1653 | hdl->sa_spill->db_size); | |
1654 | spill_attr_count = | |
1655 | hdl->sa_spill_tab->sa_layout->lot_attr_count; | |
572e2857 BB |
1656 | } else if (error && error != ENOENT) { |
1657 | if (old_data[0]) | |
1658 | kmem_free(old_data[0], bonus_data_size); | |
1659 | return (error); | |
428870ff BB |
1660 | } else { |
1661 | old_data[1] = NULL; | |
1662 | } | |
1663 | ||
1664 | /* build descriptor of all attributes */ | |
1665 | ||
1666 | attr_count = bonus_attr_count + spill_attr_count; | |
1667 | if (action == SA_ADD) | |
1668 | attr_count++; | |
1669 | else if (action == SA_REMOVE) | |
1670 | attr_count--; | |
1671 | ||
1672 | attr_desc = kmem_zalloc(sizeof (sa_bulk_attr_t) * attr_count, KM_SLEEP); | |
1673 | ||
1674 | /* | |
1675 | * loop through bonus and spill buffer if it exists, and | |
1676 | * build up new attr_descriptor to reset the attributes | |
1677 | */ | |
1678 | k = j = 0; | |
1679 | count = bonus_attr_count; | |
1680 | hdr = SA_GET_HDR(hdl, SA_BONUS); | |
1681 | idx_tab = SA_IDX_TAB_GET(hdl, SA_BONUS); | |
1682 | for (; k != 2; k++) { | |
1683 | /* iterate over each attribute in layout */ | |
1684 | for (i = 0, length_idx = 0; i != count; i++) { | |
1685 | sa_attr_type_t attr; | |
1686 | ||
1687 | attr = idx_tab->sa_layout->lot_attrs[i]; | |
1688 | if (attr == newattr) { | |
1689 | if (action == SA_REMOVE) { | |
1690 | j++; | |
1691 | continue; | |
1692 | } | |
1693 | ASSERT(SA_REGISTERED_LEN(sa, attr) == 0); | |
1694 | ASSERT(action == SA_REPLACE); | |
1695 | SA_ADD_BULK_ATTR(attr_desc, j, attr, | |
1696 | locator, datastart, buflen); | |
1697 | } else { | |
1698 | length = SA_REGISTERED_LEN(sa, attr); | |
1699 | if (length == 0) { | |
1700 | length = hdr->sa_lengths[length_idx++]; | |
1701 | } | |
1702 | ||
1703 | SA_ADD_BULK_ATTR(attr_desc, j, attr, | |
1704 | NULL, (void *) | |
1705 | (TOC_OFF(idx_tab->sa_idx_tab[attr]) + | |
1706 | (uintptr_t)old_data[k]), length); | |
1707 | } | |
1708 | } | |
1709 | if (k == 0 && hdl->sa_spill) { | |
1710 | hdr = SA_GET_HDR(hdl, SA_SPILL); | |
1711 | idx_tab = SA_IDX_TAB_GET(hdl, SA_SPILL); | |
1712 | count = spill_attr_count; | |
1713 | } else { | |
1714 | break; | |
1715 | } | |
1716 | } | |
1717 | if (action == SA_ADD) { | |
1718 | length = SA_REGISTERED_LEN(sa, newattr); | |
1719 | if (length == 0) { | |
1720 | length = buflen; | |
1721 | } | |
1722 | SA_ADD_BULK_ATTR(attr_desc, j, newattr, locator, | |
1723 | datastart, buflen); | |
1724 | } | |
1725 | ||
1726 | error = sa_build_layouts(hdl, attr_desc, attr_count, tx); | |
1727 | ||
1728 | if (old_data[0]) | |
1729 | kmem_free(old_data[0], bonus_data_size); | |
1730 | if (old_data[1]) | |
1731 | kmem_free(old_data[1], spill_data_size); | |
1732 | kmem_free(attr_desc, sizeof (sa_bulk_attr_t) * attr_count); | |
1733 | ||
1734 | return (error); | |
1735 | } | |
1736 | ||
1737 | static int | |
1738 | sa_bulk_update_impl(sa_handle_t *hdl, sa_bulk_attr_t *bulk, int count, | |
1739 | dmu_tx_t *tx) | |
1740 | { | |
1741 | int error; | |
1742 | sa_os_t *sa = hdl->sa_os->os_sa; | |
1743 | dmu_object_type_t bonustype; | |
1744 | ||
1745 | bonustype = SA_BONUSTYPE_FROM_DB(SA_GET_DB(hdl, SA_BONUS)); | |
1746 | ||
1747 | ASSERT(hdl); | |
1748 | ASSERT(MUTEX_HELD(&hdl->sa_lock)); | |
1749 | ||
1750 | /* sync out registration table if necessary */ | |
1751 | if (sa->sa_need_attr_registration) | |
1752 | sa_attr_register_sync(hdl, tx); | |
1753 | ||
1754 | error = sa_attr_op(hdl, bulk, count, SA_UPDATE, tx); | |
1755 | if (error == 0 && !IS_SA_BONUSTYPE(bonustype) && sa->sa_update_cb) | |
1756 | sa->sa_update_cb(hdl, tx); | |
1757 | ||
1758 | return (error); | |
1759 | } | |
1760 | ||
1761 | /* | |
1762 | * update or add new attribute | |
1763 | */ | |
1764 | int | |
1765 | sa_update(sa_handle_t *hdl, sa_attr_type_t type, | |
1766 | void *buf, uint32_t buflen, dmu_tx_t *tx) | |
1767 | { | |
1768 | int error; | |
1769 | sa_bulk_attr_t bulk; | |
1770 | ||
1771 | bulk.sa_attr = type; | |
1772 | bulk.sa_data_func = NULL; | |
1773 | bulk.sa_length = buflen; | |
1774 | bulk.sa_data = buf; | |
1775 | ||
1776 | mutex_enter(&hdl->sa_lock); | |
1777 | error = sa_bulk_update_impl(hdl, &bulk, 1, tx); | |
1778 | mutex_exit(&hdl->sa_lock); | |
1779 | return (error); | |
1780 | } | |
1781 | ||
1782 | int | |
1783 | sa_update_from_cb(sa_handle_t *hdl, sa_attr_type_t attr, | |
1784 | uint32_t buflen, sa_data_locator_t *locator, void *userdata, dmu_tx_t *tx) | |
1785 | { | |
1786 | int error; | |
1787 | sa_bulk_attr_t bulk; | |
1788 | ||
1789 | bulk.sa_attr = attr; | |
1790 | bulk.sa_data = userdata; | |
1791 | bulk.sa_data_func = locator; | |
1792 | bulk.sa_length = buflen; | |
1793 | ||
1794 | mutex_enter(&hdl->sa_lock); | |
1795 | error = sa_bulk_update_impl(hdl, &bulk, 1, tx); | |
1796 | mutex_exit(&hdl->sa_lock); | |
1797 | return (error); | |
1798 | } | |
1799 | ||
1800 | /* | |
1801 | * Return size of an attribute | |
1802 | */ | |
1803 | ||
1804 | int | |
1805 | sa_size(sa_handle_t *hdl, sa_attr_type_t attr, int *size) | |
1806 | { | |
1807 | sa_bulk_attr_t bulk; | |
572e2857 | 1808 | int error; |
428870ff BB |
1809 | |
1810 | bulk.sa_data = NULL; | |
1811 | bulk.sa_attr = attr; | |
1812 | bulk.sa_data_func = NULL; | |
1813 | ||
1814 | ASSERT(hdl); | |
1815 | mutex_enter(&hdl->sa_lock); | |
572e2857 | 1816 | if ((error = sa_attr_op(hdl, &bulk, 1, SA_LOOKUP, NULL)) != 0) { |
428870ff | 1817 | mutex_exit(&hdl->sa_lock); |
572e2857 | 1818 | return (error); |
428870ff BB |
1819 | } |
1820 | *size = bulk.sa_size; | |
1821 | ||
1822 | mutex_exit(&hdl->sa_lock); | |
1823 | return (0); | |
1824 | } | |
1825 | ||
1826 | int | |
1827 | sa_bulk_lookup_locked(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count) | |
1828 | { | |
1829 | ASSERT(hdl); | |
1830 | ASSERT(MUTEX_HELD(&hdl->sa_lock)); | |
1831 | return (sa_lookup_impl(hdl, attrs, count)); | |
1832 | } | |
1833 | ||
1834 | int | |
1835 | sa_bulk_lookup(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count) | |
1836 | { | |
1837 | int error; | |
1838 | ||
1839 | ASSERT(hdl); | |
1840 | mutex_enter(&hdl->sa_lock); | |
1841 | error = sa_bulk_lookup_locked(hdl, attrs, count); | |
1842 | mutex_exit(&hdl->sa_lock); | |
1843 | return (error); | |
1844 | } | |
1845 | ||
1846 | int | |
1847 | sa_bulk_update(sa_handle_t *hdl, sa_bulk_attr_t *attrs, int count, dmu_tx_t *tx) | |
1848 | { | |
1849 | int error; | |
1850 | ||
1851 | ASSERT(hdl); | |
1852 | mutex_enter(&hdl->sa_lock); | |
1853 | error = sa_bulk_update_impl(hdl, attrs, count, tx); | |
1854 | mutex_exit(&hdl->sa_lock); | |
1855 | return (error); | |
1856 | } | |
1857 | ||
1858 | int | |
1859 | sa_remove(sa_handle_t *hdl, sa_attr_type_t attr, dmu_tx_t *tx) | |
1860 | { | |
1861 | int error; | |
1862 | ||
1863 | mutex_enter(&hdl->sa_lock); | |
1864 | error = sa_modify_attrs(hdl, attr, SA_REMOVE, NULL, | |
1865 | NULL, 0, tx); | |
1866 | mutex_exit(&hdl->sa_lock); | |
1867 | return (error); | |
1868 | } | |
1869 | ||
1870 | void | |
1871 | sa_object_info(sa_handle_t *hdl, dmu_object_info_t *doi) | |
1872 | { | |
1873 | dmu_object_info_from_db((dmu_buf_t *)hdl->sa_bonus, doi); | |
1874 | } | |
1875 | ||
1876 | void | |
1877 | sa_object_size(sa_handle_t *hdl, uint32_t *blksize, u_longlong_t *nblocks) | |
1878 | { | |
1879 | dmu_object_size_from_db((dmu_buf_t *)hdl->sa_bonus, | |
1880 | blksize, nblocks); | |
1881 | } | |
1882 | ||
1883 | void | |
1884 | sa_update_user(sa_handle_t *newhdl, sa_handle_t *oldhdl) | |
1885 | { | |
1886 | (void) dmu_buf_update_user((dmu_buf_t *)newhdl->sa_bonus, | |
1887 | oldhdl, newhdl, NULL, sa_evict); | |
1888 | oldhdl->sa_bonus = NULL; | |
1889 | } | |
1890 | ||
1891 | void | |
1892 | sa_set_userp(sa_handle_t *hdl, void *ptr) | |
1893 | { | |
1894 | hdl->sa_userp = ptr; | |
1895 | } | |
1896 | ||
1897 | dmu_buf_t * | |
1898 | sa_get_db(sa_handle_t *hdl) | |
1899 | { | |
1900 | return ((dmu_buf_t *)hdl->sa_bonus); | |
1901 | } | |
1902 | ||
1903 | void * | |
1904 | sa_get_userdata(sa_handle_t *hdl) | |
1905 | { | |
1906 | return (hdl->sa_userp); | |
1907 | } | |
1908 | ||
1909 | void | |
1910 | sa_register_update_callback_locked(objset_t *os, sa_update_cb_t *func) | |
1911 | { | |
1912 | ASSERT(MUTEX_HELD(&os->os_sa->sa_lock)); | |
1913 | os->os_sa->sa_update_cb = func; | |
1914 | } | |
1915 | ||
1916 | void | |
1917 | sa_register_update_callback(objset_t *os, sa_update_cb_t *func) | |
1918 | { | |
1919 | ||
1920 | mutex_enter(&os->os_sa->sa_lock); | |
1921 | sa_register_update_callback_locked(os, func); | |
1922 | mutex_exit(&os->os_sa->sa_lock); | |
1923 | } | |
1924 | ||
1925 | uint64_t | |
1926 | sa_handle_object(sa_handle_t *hdl) | |
1927 | { | |
1928 | return (hdl->sa_bonus->db_object); | |
1929 | } | |
1930 | ||
1931 | boolean_t | |
1932 | sa_enabled(objset_t *os) | |
1933 | { | |
1934 | return (os->os_sa == NULL); | |
1935 | } | |
1936 | ||
1937 | int | |
1938 | sa_set_sa_object(objset_t *os, uint64_t sa_object) | |
1939 | { | |
1940 | sa_os_t *sa = os->os_sa; | |
1941 | ||
1942 | if (sa->sa_master_obj) | |
1943 | return (1); | |
1944 | ||
1945 | sa->sa_master_obj = sa_object; | |
1946 | ||
1947 | return (0); | |
1948 | } | |
1949 | ||
1950 | int | |
1951 | sa_hdrsize(void *arg) | |
1952 | { | |
1953 | sa_hdr_phys_t *hdr = arg; | |
1954 | ||
1955 | return (SA_HDR_SIZE(hdr)); | |
1956 | } | |
1957 | ||
1958 | void | |
1959 | sa_handle_lock(sa_handle_t *hdl) | |
1960 | { | |
1961 | ASSERT(hdl); | |
1962 | mutex_enter(&hdl->sa_lock); | |
1963 | } | |
1964 | ||
1965 | void | |
1966 | sa_handle_unlock(sa_handle_t *hdl) | |
1967 | { | |
1968 | ASSERT(hdl); | |
1969 | mutex_exit(&hdl->sa_lock); | |
1970 | } |