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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 | /* | |
23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
24 | * Copyright (c) 2011, 2018 by Delphix. All rights reserved. | |
25 | * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. | |
26 | * Copyright 2017 Nexenta Systems, Inc. | |
27 | */ | |
28 | ||
29 | #include <sys/zio.h> | |
30 | #include <sys/spa.h> | |
31 | #include <sys/dmu.h> | |
32 | #include <sys/zfs_context.h> | |
33 | #include <sys/zap.h> | |
34 | #include <sys/refcount.h> | |
35 | #include <sys/zap_impl.h> | |
36 | #include <sys/zap_leaf.h> | |
37 | #include <sys/avl.h> | |
38 | #include <sys/arc.h> | |
39 | #include <sys/dmu_objset.h> | |
40 | ||
41 | #ifdef _KERNEL | |
42 | #include <sys/sunddi.h> | |
43 | #endif | |
44 | ||
45 | extern inline mzap_phys_t *zap_m_phys(zap_t *zap); | |
46 | ||
47 | static int mzap_upgrade(zap_t **zapp, | |
48 | void *tag, dmu_tx_t *tx, zap_flags_t flags); | |
49 | ||
50 | uint64_t | |
51 | zap_getflags(zap_t *zap) | |
52 | { | |
53 | if (zap->zap_ismicro) | |
54 | return (0); | |
55 | return (zap_f_phys(zap)->zap_flags); | |
56 | } | |
57 | ||
58 | int | |
59 | zap_hashbits(zap_t *zap) | |
60 | { | |
61 | if (zap_getflags(zap) & ZAP_FLAG_HASH64) | |
62 | return (48); | |
63 | else | |
64 | return (28); | |
65 | } | |
66 | ||
67 | uint32_t | |
68 | zap_maxcd(zap_t *zap) | |
69 | { | |
70 | if (zap_getflags(zap) & ZAP_FLAG_HASH64) | |
71 | return ((1<<16)-1); | |
72 | else | |
73 | return (-1U); | |
74 | } | |
75 | ||
76 | static uint64_t | |
77 | zap_hash(zap_name_t *zn) | |
78 | { | |
79 | zap_t *zap = zn->zn_zap; | |
80 | uint64_t h = 0; | |
81 | ||
82 | if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { | |
83 | ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); | |
84 | h = *(uint64_t *)zn->zn_key_orig; | |
85 | } else { | |
86 | h = zap->zap_salt; | |
87 | ASSERT(h != 0); | |
88 | ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); | |
89 | ||
90 | if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { | |
91 | const uint64_t *wp = zn->zn_key_norm; | |
92 | ||
93 | ASSERT(zn->zn_key_intlen == 8); | |
94 | for (int i = 0; i < zn->zn_key_norm_numints; | |
95 | wp++, i++) { | |
96 | uint64_t word = *wp; | |
97 | ||
98 | for (int j = 0; j < zn->zn_key_intlen; j++) { | |
99 | h = (h >> 8) ^ | |
100 | zfs_crc64_table[(h ^ word) & 0xFF]; | |
101 | word >>= NBBY; | |
102 | } | |
103 | } | |
104 | } else { | |
105 | const uint8_t *cp = zn->zn_key_norm; | |
106 | ||
107 | /* | |
108 | * We previously stored the terminating null on | |
109 | * disk, but didn't hash it, so we need to | |
110 | * continue to not hash it. (The | |
111 | * zn_key_*_numints includes the terminating | |
112 | * null for non-binary keys.) | |
113 | */ | |
114 | int len = zn->zn_key_norm_numints - 1; | |
115 | ||
116 | ASSERT(zn->zn_key_intlen == 1); | |
117 | for (int i = 0; i < len; cp++, i++) { | |
118 | h = (h >> 8) ^ | |
119 | zfs_crc64_table[(h ^ *cp) & 0xFF]; | |
120 | } | |
121 | } | |
122 | } | |
123 | /* | |
124 | * Don't use all 64 bits, since we need some in the cookie for | |
125 | * the collision differentiator. We MUST use the high bits, | |
126 | * since those are the ones that we first pay attention to when | |
127 | * choosing the bucket. | |
128 | */ | |
129 | h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); | |
130 | ||
131 | return (h); | |
132 | } | |
133 | ||
134 | static int | |
135 | zap_normalize(zap_t *zap, const char *name, char *namenorm, int normflags) | |
136 | { | |
137 | ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); | |
138 | ||
139 | size_t inlen = strlen(name) + 1; | |
140 | size_t outlen = ZAP_MAXNAMELEN; | |
141 | ||
142 | int err = 0; | |
143 | (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, | |
144 | normflags | U8_TEXTPREP_IGNORE_NULL | U8_TEXTPREP_IGNORE_INVALID, | |
145 | U8_UNICODE_LATEST, &err); | |
146 | ||
147 | return (err); | |
148 | } | |
149 | ||
150 | boolean_t | |
151 | zap_match(zap_name_t *zn, const char *matchname) | |
152 | { | |
153 | ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); | |
154 | ||
155 | if (zn->zn_matchtype & MT_NORMALIZE) { | |
156 | char norm[ZAP_MAXNAMELEN]; | |
157 | ||
158 | if (zap_normalize(zn->zn_zap, matchname, norm, | |
159 | zn->zn_normflags) != 0) | |
160 | return (B_FALSE); | |
161 | ||
162 | return (strcmp(zn->zn_key_norm, norm) == 0); | |
163 | } else { | |
164 | return (strcmp(zn->zn_key_orig, matchname) == 0); | |
165 | } | |
166 | } | |
167 | ||
168 | void | |
169 | zap_name_free(zap_name_t *zn) | |
170 | { | |
171 | kmem_free(zn, sizeof (zap_name_t)); | |
172 | } | |
173 | ||
174 | zap_name_t * | |
175 | zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) | |
176 | { | |
177 | zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); | |
178 | ||
179 | zn->zn_zap = zap; | |
180 | zn->zn_key_intlen = sizeof (*key); | |
181 | zn->zn_key_orig = key; | |
182 | zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; | |
183 | zn->zn_matchtype = mt; | |
184 | zn->zn_normflags = zap->zap_normflags; | |
185 | ||
186 | /* | |
187 | * If we're dealing with a case sensitive lookup on a mixed or | |
188 | * insensitive fs, remove U8_TEXTPREP_TOUPPER or the lookup | |
189 | * will fold case to all caps overriding the lookup request. | |
190 | */ | |
191 | if (mt & MT_MATCH_CASE) | |
192 | zn->zn_normflags &= ~U8_TEXTPREP_TOUPPER; | |
193 | ||
194 | if (zap->zap_normflags) { | |
195 | /* | |
196 | * We *must* use zap_normflags because this normalization is | |
197 | * what the hash is computed from. | |
198 | */ | |
199 | if (zap_normalize(zap, key, zn->zn_normbuf, | |
200 | zap->zap_normflags) != 0) { | |
201 | zap_name_free(zn); | |
202 | return (NULL); | |
203 | } | |
204 | zn->zn_key_norm = zn->zn_normbuf; | |
205 | zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; | |
206 | } else { | |
207 | if (mt != 0) { | |
208 | zap_name_free(zn); | |
209 | return (NULL); | |
210 | } | |
211 | zn->zn_key_norm = zn->zn_key_orig; | |
212 | zn->zn_key_norm_numints = zn->zn_key_orig_numints; | |
213 | } | |
214 | ||
215 | zn->zn_hash = zap_hash(zn); | |
216 | ||
217 | if (zap->zap_normflags != zn->zn_normflags) { | |
218 | /* | |
219 | * We *must* use zn_normflags because this normalization is | |
220 | * what the matching is based on. (Not the hash!) | |
221 | */ | |
222 | if (zap_normalize(zap, key, zn->zn_normbuf, | |
223 | zn->zn_normflags) != 0) { | |
224 | zap_name_free(zn); | |
225 | return (NULL); | |
226 | } | |
227 | zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; | |
228 | } | |
229 | ||
230 | return (zn); | |
231 | } | |
232 | ||
233 | zap_name_t * | |
234 | zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) | |
235 | { | |
236 | zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); | |
237 | ||
238 | ASSERT(zap->zap_normflags == 0); | |
239 | zn->zn_zap = zap; | |
240 | zn->zn_key_intlen = sizeof (*key); | |
241 | zn->zn_key_orig = zn->zn_key_norm = key; | |
242 | zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; | |
243 | zn->zn_matchtype = 0; | |
244 | ||
245 | zn->zn_hash = zap_hash(zn); | |
246 | return (zn); | |
247 | } | |
248 | ||
249 | static void | |
250 | mzap_byteswap(mzap_phys_t *buf, size_t size) | |
251 | { | |
252 | buf->mz_block_type = BSWAP_64(buf->mz_block_type); | |
253 | buf->mz_salt = BSWAP_64(buf->mz_salt); | |
254 | buf->mz_normflags = BSWAP_64(buf->mz_normflags); | |
255 | int max = (size / MZAP_ENT_LEN) - 1; | |
256 | for (int i = 0; i < max; i++) { | |
257 | buf->mz_chunk[i].mze_value = | |
258 | BSWAP_64(buf->mz_chunk[i].mze_value); | |
259 | buf->mz_chunk[i].mze_cd = | |
260 | BSWAP_32(buf->mz_chunk[i].mze_cd); | |
261 | } | |
262 | } | |
263 | ||
264 | void | |
265 | zap_byteswap(void *buf, size_t size) | |
266 | { | |
267 | uint64_t block_type = *(uint64_t *)buf; | |
268 | ||
269 | if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { | |
270 | /* ASSERT(magic == ZAP_LEAF_MAGIC); */ | |
271 | mzap_byteswap(buf, size); | |
272 | } else { | |
273 | fzap_byteswap(buf, size); | |
274 | } | |
275 | } | |
276 | ||
277 | static int | |
278 | mze_compare(const void *arg1, const void *arg2) | |
279 | { | |
280 | const mzap_ent_t *mze1 = arg1; | |
281 | const mzap_ent_t *mze2 = arg2; | |
282 | ||
283 | int cmp = AVL_CMP(mze1->mze_hash, mze2->mze_hash); | |
284 | if (likely(cmp)) | |
285 | return (cmp); | |
286 | ||
287 | return (AVL_CMP(mze1->mze_cd, mze2->mze_cd)); | |
288 | } | |
289 | ||
290 | static void | |
291 | mze_insert(zap_t *zap, int chunkid, uint64_t hash) | |
292 | { | |
293 | ASSERT(zap->zap_ismicro); | |
294 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
295 | ||
296 | mzap_ent_t *mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); | |
297 | mze->mze_chunkid = chunkid; | |
298 | mze->mze_hash = hash; | |
299 | mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; | |
300 | ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); | |
301 | avl_add(&zap->zap_m.zap_avl, mze); | |
302 | } | |
303 | ||
304 | static mzap_ent_t * | |
305 | mze_find(zap_name_t *zn) | |
306 | { | |
307 | mzap_ent_t mze_tofind; | |
308 | mzap_ent_t *mze; | |
309 | avl_index_t idx; | |
310 | avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; | |
311 | ||
312 | ASSERT(zn->zn_zap->zap_ismicro); | |
313 | ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); | |
314 | ||
315 | mze_tofind.mze_hash = zn->zn_hash; | |
316 | mze_tofind.mze_cd = 0; | |
317 | ||
318 | mze = avl_find(avl, &mze_tofind, &idx); | |
319 | if (mze == NULL) | |
320 | mze = avl_nearest(avl, idx, AVL_AFTER); | |
321 | for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { | |
322 | ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); | |
323 | if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) | |
324 | return (mze); | |
325 | } | |
326 | ||
327 | return (NULL); | |
328 | } | |
329 | ||
330 | static uint32_t | |
331 | mze_find_unused_cd(zap_t *zap, uint64_t hash) | |
332 | { | |
333 | mzap_ent_t mze_tofind; | |
334 | avl_index_t idx; | |
335 | avl_tree_t *avl = &zap->zap_m.zap_avl; | |
336 | ||
337 | ASSERT(zap->zap_ismicro); | |
338 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
339 | ||
340 | mze_tofind.mze_hash = hash; | |
341 | mze_tofind.mze_cd = 0; | |
342 | ||
343 | uint32_t cd = 0; | |
344 | for (mzap_ent_t *mze = avl_find(avl, &mze_tofind, &idx); | |
345 | mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { | |
346 | if (mze->mze_cd != cd) | |
347 | break; | |
348 | cd++; | |
349 | } | |
350 | ||
351 | return (cd); | |
352 | } | |
353 | ||
354 | /* | |
355 | * Each mzap entry requires at max : 4 chunks | |
356 | * 3 chunks for names + 1 chunk for value. | |
357 | */ | |
358 | #define MZAP_ENT_CHUNKS (1 + ZAP_LEAF_ARRAY_NCHUNKS(MZAP_NAME_LEN) + \ | |
359 | ZAP_LEAF_ARRAY_NCHUNKS(sizeof (uint64_t))) | |
360 | ||
361 | /* | |
362 | * Check if the current entry keeps the colliding entries under the fatzap leaf | |
363 | * size. | |
364 | */ | |
365 | static boolean_t | |
366 | mze_canfit_fzap_leaf(zap_name_t *zn, uint64_t hash) | |
367 | { | |
368 | zap_t *zap = zn->zn_zap; | |
369 | mzap_ent_t mze_tofind; | |
370 | mzap_ent_t *mze; | |
371 | avl_index_t idx; | |
372 | avl_tree_t *avl = &zap->zap_m.zap_avl; | |
373 | uint32_t mzap_ents = 0; | |
374 | ||
375 | mze_tofind.mze_hash = hash; | |
376 | mze_tofind.mze_cd = 0; | |
377 | ||
378 | for (mze = avl_find(avl, &mze_tofind, &idx); | |
379 | mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { | |
380 | mzap_ents++; | |
381 | } | |
382 | ||
383 | /* Include the new entry being added */ | |
384 | mzap_ents++; | |
385 | ||
386 | return (ZAP_LEAF_NUMCHUNKS_DEF > (mzap_ents * MZAP_ENT_CHUNKS)); | |
387 | } | |
388 | ||
389 | static void | |
390 | mze_remove(zap_t *zap, mzap_ent_t *mze) | |
391 | { | |
392 | ASSERT(zap->zap_ismicro); | |
393 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
394 | ||
395 | avl_remove(&zap->zap_m.zap_avl, mze); | |
396 | kmem_free(mze, sizeof (mzap_ent_t)); | |
397 | } | |
398 | ||
399 | static void | |
400 | mze_destroy(zap_t *zap) | |
401 | { | |
402 | mzap_ent_t *mze; | |
403 | void *avlcookie = NULL; | |
404 | ||
405 | while ((mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie))) | |
406 | kmem_free(mze, sizeof (mzap_ent_t)); | |
407 | avl_destroy(&zap->zap_m.zap_avl); | |
408 | } | |
409 | ||
410 | static zap_t * | |
411 | mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) | |
412 | { | |
413 | zap_t *winner; | |
414 | uint64_t *zap_hdr = (uint64_t *)db->db_data; | |
415 | uint64_t zap_block_type = zap_hdr[0]; | |
416 | uint64_t zap_magic = zap_hdr[1]; | |
417 | ||
418 | ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); | |
419 | ||
420 | zap_t *zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); | |
421 | rw_init(&zap->zap_rwlock, NULL, RW_DEFAULT, NULL); | |
422 | rw_enter(&zap->zap_rwlock, RW_WRITER); | |
423 | zap->zap_objset = os; | |
424 | zap->zap_object = obj; | |
425 | zap->zap_dbuf = db; | |
426 | ||
427 | if (zap_block_type != ZBT_MICRO) { | |
428 | mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, MUTEX_DEFAULT, | |
429 | 0); | |
430 | zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1; | |
431 | if (zap_block_type != ZBT_HEADER || zap_magic != ZAP_MAGIC) { | |
432 | winner = NULL; /* No actual winner here... */ | |
433 | goto handle_winner; | |
434 | } | |
435 | } else { | |
436 | zap->zap_ismicro = TRUE; | |
437 | } | |
438 | ||
439 | /* | |
440 | * Make sure that zap_ismicro is set before we let others see | |
441 | * it, because zap_lockdir() checks zap_ismicro without the lock | |
442 | * held. | |
443 | */ | |
444 | dmu_buf_init_user(&zap->zap_dbu, zap_evict_sync, NULL, &zap->zap_dbuf); | |
445 | winner = dmu_buf_set_user(db, &zap->zap_dbu); | |
446 | ||
447 | if (winner != NULL) | |
448 | goto handle_winner; | |
449 | ||
450 | if (zap->zap_ismicro) { | |
451 | zap->zap_salt = zap_m_phys(zap)->mz_salt; | |
452 | zap->zap_normflags = zap_m_phys(zap)->mz_normflags; | |
453 | zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; | |
454 | avl_create(&zap->zap_m.zap_avl, mze_compare, | |
455 | sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); | |
456 | ||
457 | for (int i = 0; i < zap->zap_m.zap_num_chunks; i++) { | |
458 | mzap_ent_phys_t *mze = | |
459 | &zap_m_phys(zap)->mz_chunk[i]; | |
460 | if (mze->mze_name[0]) { | |
461 | zap_name_t *zn; | |
462 | ||
463 | zap->zap_m.zap_num_entries++; | |
464 | zn = zap_name_alloc(zap, mze->mze_name, 0); | |
465 | mze_insert(zap, i, zn->zn_hash); | |
466 | zap_name_free(zn); | |
467 | } | |
468 | } | |
469 | } else { | |
470 | zap->zap_salt = zap_f_phys(zap)->zap_salt; | |
471 | zap->zap_normflags = zap_f_phys(zap)->zap_normflags; | |
472 | ||
473 | ASSERT3U(sizeof (struct zap_leaf_header), ==, | |
474 | 2*ZAP_LEAF_CHUNKSIZE); | |
475 | ||
476 | /* | |
477 | * The embedded pointer table should not overlap the | |
478 | * other members. | |
479 | */ | |
480 | ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, | |
481 | &zap_f_phys(zap)->zap_salt); | |
482 | ||
483 | /* | |
484 | * The embedded pointer table should end at the end of | |
485 | * the block | |
486 | */ | |
487 | ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, | |
488 | 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - | |
489 | (uintptr_t)zap_f_phys(zap), ==, | |
490 | zap->zap_dbuf->db_size); | |
491 | } | |
492 | rw_exit(&zap->zap_rwlock); | |
493 | return (zap); | |
494 | ||
495 | handle_winner: | |
496 | rw_exit(&zap->zap_rwlock); | |
497 | rw_destroy(&zap->zap_rwlock); | |
498 | if (!zap->zap_ismicro) | |
499 | mutex_destroy(&zap->zap_f.zap_num_entries_mtx); | |
500 | kmem_free(zap, sizeof (zap_t)); | |
501 | return (winner); | |
502 | } | |
503 | ||
504 | /* | |
505 | * This routine "consumes" the caller's hold on the dbuf, which must | |
506 | * have the specified tag. | |
507 | */ | |
508 | static int | |
509 | zap_lockdir_impl(dmu_buf_t *db, void *tag, dmu_tx_t *tx, | |
510 | krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) | |
511 | { | |
512 | ASSERT0(db->db_offset); | |
513 | objset_t *os = dmu_buf_get_objset(db); | |
514 | uint64_t obj = db->db_object; | |
515 | dmu_object_info_t doi; | |
516 | ||
517 | *zapp = NULL; | |
518 | ||
519 | dmu_object_info_from_db(db, &doi); | |
520 | if (DMU_OT_BYTESWAP(doi.doi_type) != DMU_BSWAP_ZAP) | |
521 | return (SET_ERROR(EINVAL)); | |
522 | ||
523 | zap_t *zap = dmu_buf_get_user(db); | |
524 | if (zap == NULL) { | |
525 | zap = mzap_open(os, obj, db); | |
526 | if (zap == NULL) { | |
527 | /* | |
528 | * mzap_open() didn't like what it saw on-disk. | |
529 | * Check for corruption! | |
530 | */ | |
531 | return (SET_ERROR(EIO)); | |
532 | } | |
533 | } | |
534 | ||
535 | /* | |
536 | * We're checking zap_ismicro without the lock held, in order to | |
537 | * tell what type of lock we want. Once we have some sort of | |
538 | * lock, see if it really is the right type. In practice this | |
539 | * can only be different if it was upgraded from micro to fat, | |
540 | * and micro wanted WRITER but fat only needs READER. | |
541 | */ | |
542 | krw_t lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; | |
543 | rw_enter(&zap->zap_rwlock, lt); | |
544 | if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { | |
545 | /* it was upgraded, now we only need reader */ | |
546 | ASSERT(lt == RW_WRITER); | |
547 | ASSERT(RW_READER == | |
548 | ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)); | |
549 | rw_downgrade(&zap->zap_rwlock); | |
550 | lt = RW_READER; | |
551 | } | |
552 | ||
553 | zap->zap_objset = os; | |
554 | ||
555 | if (lt == RW_WRITER) | |
556 | dmu_buf_will_dirty(db, tx); | |
557 | ||
558 | ASSERT3P(zap->zap_dbuf, ==, db); | |
559 | ||
560 | ASSERT(!zap->zap_ismicro || | |
561 | zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); | |
562 | if (zap->zap_ismicro && tx && adding && | |
563 | zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { | |
564 | uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; | |
565 | if (newsz > MZAP_MAX_BLKSZ) { | |
566 | dprintf("upgrading obj %llu: num_entries=%u\n", | |
567 | obj, zap->zap_m.zap_num_entries); | |
568 | *zapp = zap; | |
569 | int err = mzap_upgrade(zapp, tag, tx, 0); | |
570 | if (err != 0) | |
571 | rw_exit(&zap->zap_rwlock); | |
572 | return (err); | |
573 | } | |
574 | VERIFY0(dmu_object_set_blocksize(os, obj, newsz, 0, tx)); | |
575 | zap->zap_m.zap_num_chunks = | |
576 | db->db_size / MZAP_ENT_LEN - 1; | |
577 | } | |
578 | ||
579 | *zapp = zap; | |
580 | return (0); | |
581 | } | |
582 | ||
583 | static int | |
584 | zap_lockdir_by_dnode(dnode_t *dn, dmu_tx_t *tx, | |
585 | krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp) | |
586 | { | |
587 | dmu_buf_t *db; | |
588 | ||
589 | int err = dmu_buf_hold_by_dnode(dn, 0, tag, &db, DMU_READ_NO_PREFETCH); | |
590 | if (err != 0) { | |
591 | return (err); | |
592 | } | |
593 | #ifdef ZFS_DEBUG | |
594 | { | |
595 | dmu_object_info_t doi; | |
596 | dmu_object_info_from_db(db, &doi); | |
597 | ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); | |
598 | } | |
599 | #endif | |
600 | ||
601 | err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp); | |
602 | if (err != 0) { | |
603 | dmu_buf_rele(db, tag); | |
604 | } | |
605 | return (err); | |
606 | } | |
607 | ||
608 | int | |
609 | zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, | |
610 | krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp) | |
611 | { | |
612 | dmu_buf_t *db; | |
613 | ||
614 | int err = dmu_buf_hold(os, obj, 0, tag, &db, DMU_READ_NO_PREFETCH); | |
615 | if (err != 0) | |
616 | return (err); | |
617 | #ifdef ZFS_DEBUG | |
618 | { | |
619 | dmu_object_info_t doi; | |
620 | dmu_object_info_from_db(db, &doi); | |
621 | ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); | |
622 | } | |
623 | #endif | |
624 | err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp); | |
625 | if (err != 0) | |
626 | dmu_buf_rele(db, tag); | |
627 | return (err); | |
628 | } | |
629 | ||
630 | void | |
631 | zap_unlockdir(zap_t *zap, void *tag) | |
632 | { | |
633 | rw_exit(&zap->zap_rwlock); | |
634 | dmu_buf_rele(zap->zap_dbuf, tag); | |
635 | } | |
636 | ||
637 | static int | |
638 | mzap_upgrade(zap_t **zapp, void *tag, dmu_tx_t *tx, zap_flags_t flags) | |
639 | { | |
640 | int err = 0; | |
641 | zap_t *zap = *zapp; | |
642 | ||
643 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
644 | ||
645 | int sz = zap->zap_dbuf->db_size; | |
646 | mzap_phys_t *mzp = vmem_alloc(sz, KM_SLEEP); | |
647 | bcopy(zap->zap_dbuf->db_data, mzp, sz); | |
648 | int nchunks = zap->zap_m.zap_num_chunks; | |
649 | ||
650 | if (!flags) { | |
651 | err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, | |
652 | 1ULL << fzap_default_block_shift, 0, tx); | |
653 | if (err != 0) { | |
654 | vmem_free(mzp, sz); | |
655 | return (err); | |
656 | } | |
657 | } | |
658 | ||
659 | dprintf("upgrading obj=%llu with %u chunks\n", | |
660 | zap->zap_object, nchunks); | |
661 | /* XXX destroy the avl later, so we can use the stored hash value */ | |
662 | mze_destroy(zap); | |
663 | ||
664 | fzap_upgrade(zap, tx, flags); | |
665 | ||
666 | for (int i = 0; i < nchunks; i++) { | |
667 | mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; | |
668 | if (mze->mze_name[0] == 0) | |
669 | continue; | |
670 | dprintf("adding %s=%llu\n", | |
671 | mze->mze_name, mze->mze_value); | |
672 | zap_name_t *zn = zap_name_alloc(zap, mze->mze_name, 0); | |
673 | /* If we fail here, we would end up losing entries */ | |
674 | VERIFY0(fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, | |
675 | tag, tx)); | |
676 | zap = zn->zn_zap; /* fzap_add_cd() may change zap */ | |
677 | zap_name_free(zn); | |
678 | } | |
679 | vmem_free(mzp, sz); | |
680 | *zapp = zap; | |
681 | return (0); | |
682 | } | |
683 | ||
684 | /* | |
685 | * The "normflags" determine the behavior of the matchtype_t which is | |
686 | * passed to zap_lookup_norm(). Names which have the same normalized | |
687 | * version will be stored with the same hash value, and therefore we can | |
688 | * perform normalization-insensitive lookups. We can be Unicode form- | |
689 | * insensitive and/or case-insensitive. The following flags are valid for | |
690 | * "normflags": | |
691 | * | |
692 | * U8_TEXTPREP_NFC | |
693 | * U8_TEXTPREP_NFD | |
694 | * U8_TEXTPREP_NFKC | |
695 | * U8_TEXTPREP_NFKD | |
696 | * U8_TEXTPREP_TOUPPER | |
697 | * | |
698 | * The *_NF* (Normalization Form) flags are mutually exclusive; at most one | |
699 | * of them may be supplied. | |
700 | */ | |
701 | void | |
702 | mzap_create_impl(dnode_t *dn, int normflags, zap_flags_t flags, dmu_tx_t *tx) | |
703 | { | |
704 | dmu_buf_t *db; | |
705 | ||
706 | VERIFY0(dmu_buf_hold_by_dnode(dn, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); | |
707 | ||
708 | dmu_buf_will_dirty(db, tx); | |
709 | mzap_phys_t *zp = db->db_data; | |
710 | zp->mz_block_type = ZBT_MICRO; | |
711 | zp->mz_salt = | |
712 | ((uintptr_t)db ^ (uintptr_t)tx ^ (dn->dn_object << 1)) | 1ULL; | |
713 | zp->mz_normflags = normflags; | |
714 | ||
715 | if (flags != 0) { | |
716 | zap_t *zap; | |
717 | /* Only fat zap supports flags; upgrade immediately. */ | |
718 | VERIFY0(zap_lockdir_impl(db, FTAG, tx, RW_WRITER, | |
719 | B_FALSE, B_FALSE, &zap)); | |
720 | VERIFY0(mzap_upgrade(&zap, FTAG, tx, flags)); | |
721 | zap_unlockdir(zap, FTAG); | |
722 | } else { | |
723 | dmu_buf_rele(db, FTAG); | |
724 | } | |
725 | } | |
726 | ||
727 | static uint64_t | |
728 | zap_create_impl(objset_t *os, int normflags, zap_flags_t flags, | |
729 | dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, | |
730 | dmu_object_type_t bonustype, int bonuslen, int dnodesize, | |
731 | dnode_t **allocated_dnode, void *tag, dmu_tx_t *tx) | |
732 | { | |
733 | uint64_t obj; | |
734 | ||
735 | ASSERT3U(DMU_OT_BYTESWAP(ot), ==, DMU_BSWAP_ZAP); | |
736 | ||
737 | if (allocated_dnode == NULL) { | |
738 | dnode_t *dn; | |
739 | obj = dmu_object_alloc_hold(os, ot, 1ULL << leaf_blockshift, | |
740 | indirect_blockshift, bonustype, bonuslen, dnodesize, | |
741 | &dn, FTAG, tx); | |
742 | mzap_create_impl(dn, normflags, flags, tx); | |
743 | dnode_rele(dn, FTAG); | |
744 | } else { | |
745 | obj = dmu_object_alloc_hold(os, ot, 1ULL << leaf_blockshift, | |
746 | indirect_blockshift, bonustype, bonuslen, dnodesize, | |
747 | allocated_dnode, tag, tx); | |
748 | mzap_create_impl(*allocated_dnode, normflags, flags, tx); | |
749 | } | |
750 | ||
751 | return (obj); | |
752 | } | |
753 | ||
754 | int | |
755 | zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, | |
756 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
757 | { | |
758 | return (zap_create_claim_dnsize(os, obj, ot, bonustype, bonuslen, | |
759 | 0, tx)); | |
760 | } | |
761 | ||
762 | int | |
763 | zap_create_claim_dnsize(objset_t *os, uint64_t obj, dmu_object_type_t ot, | |
764 | dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx) | |
765 | { | |
766 | return (zap_create_claim_norm_dnsize(os, obj, | |
767 | 0, ot, bonustype, bonuslen, dnodesize, tx)); | |
768 | } | |
769 | ||
770 | int | |
771 | zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, | |
772 | dmu_object_type_t ot, | |
773 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
774 | { | |
775 | return (zap_create_claim_norm_dnsize(os, obj, normflags, ot, bonustype, | |
776 | bonuslen, 0, tx)); | |
777 | } | |
778 | ||
779 | int | |
780 | zap_create_claim_norm_dnsize(objset_t *os, uint64_t obj, int normflags, | |
781 | dmu_object_type_t ot, dmu_object_type_t bonustype, int bonuslen, | |
782 | int dnodesize, dmu_tx_t *tx) | |
783 | { | |
784 | dnode_t *dn; | |
785 | int error; | |
786 | ||
787 | ASSERT3U(DMU_OT_BYTESWAP(ot), ==, DMU_BSWAP_ZAP); | |
788 | error = dmu_object_claim_dnsize(os, obj, ot, 0, bonustype, bonuslen, | |
789 | dnodesize, tx); | |
790 | if (error != 0) | |
791 | return (error); | |
792 | ||
793 | error = dnode_hold(os, obj, FTAG, &dn); | |
794 | if (error != 0) | |
795 | return (error); | |
796 | ||
797 | mzap_create_impl(dn, normflags, 0, tx); | |
798 | ||
799 | dnode_rele(dn, FTAG); | |
800 | ||
801 | return (0); | |
802 | } | |
803 | ||
804 | uint64_t | |
805 | zap_create(objset_t *os, dmu_object_type_t ot, | |
806 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
807 | { | |
808 | return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); | |
809 | } | |
810 | ||
811 | uint64_t | |
812 | zap_create_dnsize(objset_t *os, dmu_object_type_t ot, | |
813 | dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx) | |
814 | { | |
815 | return (zap_create_norm_dnsize(os, 0, ot, bonustype, bonuslen, | |
816 | dnodesize, tx)); | |
817 | } | |
818 | ||
819 | uint64_t | |
820 | zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, | |
821 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
822 | { | |
823 | return (zap_create_norm_dnsize(os, normflags, ot, bonustype, bonuslen, | |
824 | 0, tx)); | |
825 | } | |
826 | ||
827 | uint64_t | |
828 | zap_create_norm_dnsize(objset_t *os, int normflags, dmu_object_type_t ot, | |
829 | dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx) | |
830 | { | |
831 | return (zap_create_impl(os, normflags, 0, ot, 0, 0, | |
832 | bonustype, bonuslen, dnodesize, NULL, NULL, tx)); | |
833 | } | |
834 | ||
835 | uint64_t | |
836 | zap_create_flags(objset_t *os, int normflags, zap_flags_t flags, | |
837 | dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, | |
838 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
839 | { | |
840 | return (zap_create_flags_dnsize(os, normflags, flags, ot, | |
841 | leaf_blockshift, indirect_blockshift, bonustype, bonuslen, 0, tx)); | |
842 | } | |
843 | ||
844 | uint64_t | |
845 | zap_create_flags_dnsize(objset_t *os, int normflags, zap_flags_t flags, | |
846 | dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, | |
847 | dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx) | |
848 | { | |
849 | return (zap_create_impl(os, normflags, flags, ot, leaf_blockshift, | |
850 | indirect_blockshift, bonustype, bonuslen, dnodesize, NULL, NULL, | |
851 | tx)); | |
852 | } | |
853 | ||
854 | /* | |
855 | * Create a zap object and return a pointer to the newly allocated dnode via | |
856 | * the allocated_dnode argument. The returned dnode will be held and the | |
857 | * caller is responsible for releasing the hold by calling dnode_rele(). | |
858 | */ | |
859 | uint64_t | |
860 | zap_create_hold(objset_t *os, int normflags, zap_flags_t flags, | |
861 | dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, | |
862 | dmu_object_type_t bonustype, int bonuslen, int dnodesize, | |
863 | dnode_t **allocated_dnode, void *tag, dmu_tx_t *tx) | |
864 | { | |
865 | return (zap_create_impl(os, normflags, flags, ot, leaf_blockshift, | |
866 | indirect_blockshift, bonustype, bonuslen, dnodesize, | |
867 | allocated_dnode, tag, tx)); | |
868 | } | |
869 | ||
870 | int | |
871 | zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) | |
872 | { | |
873 | /* | |
874 | * dmu_object_free will free the object number and free the | |
875 | * data. Freeing the data will cause our pageout function to be | |
876 | * called, which will destroy our data (zap_leaf_t's and zap_t). | |
877 | */ | |
878 | ||
879 | return (dmu_object_free(os, zapobj, tx)); | |
880 | } | |
881 | ||
882 | void | |
883 | zap_evict_sync(void *dbu) | |
884 | { | |
885 | zap_t *zap = dbu; | |
886 | ||
887 | rw_destroy(&zap->zap_rwlock); | |
888 | ||
889 | if (zap->zap_ismicro) | |
890 | mze_destroy(zap); | |
891 | else | |
892 | mutex_destroy(&zap->zap_f.zap_num_entries_mtx); | |
893 | ||
894 | kmem_free(zap, sizeof (zap_t)); | |
895 | } | |
896 | ||
897 | int | |
898 | zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) | |
899 | { | |
900 | zap_t *zap; | |
901 | ||
902 | int err = | |
903 | zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); | |
904 | if (err != 0) | |
905 | return (err); | |
906 | if (!zap->zap_ismicro) { | |
907 | err = fzap_count(zap, count); | |
908 | } else { | |
909 | *count = zap->zap_m.zap_num_entries; | |
910 | } | |
911 | zap_unlockdir(zap, FTAG); | |
912 | return (err); | |
913 | } | |
914 | ||
915 | /* | |
916 | * zn may be NULL; if not specified, it will be computed if needed. | |
917 | * See also the comment above zap_entry_normalization_conflict(). | |
918 | */ | |
919 | static boolean_t | |
920 | mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) | |
921 | { | |
922 | int direction = AVL_BEFORE; | |
923 | boolean_t allocdzn = B_FALSE; | |
924 | ||
925 | if (zap->zap_normflags == 0) | |
926 | return (B_FALSE); | |
927 | ||
928 | again: | |
929 | for (mzap_ent_t *other = avl_walk(&zap->zap_m.zap_avl, mze, direction); | |
930 | other && other->mze_hash == mze->mze_hash; | |
931 | other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { | |
932 | ||
933 | if (zn == NULL) { | |
934 | zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, | |
935 | MT_NORMALIZE); | |
936 | allocdzn = B_TRUE; | |
937 | } | |
938 | if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { | |
939 | if (allocdzn) | |
940 | zap_name_free(zn); | |
941 | return (B_TRUE); | |
942 | } | |
943 | } | |
944 | ||
945 | if (direction == AVL_BEFORE) { | |
946 | direction = AVL_AFTER; | |
947 | goto again; | |
948 | } | |
949 | ||
950 | if (allocdzn) | |
951 | zap_name_free(zn); | |
952 | return (B_FALSE); | |
953 | } | |
954 | ||
955 | /* | |
956 | * Routines for manipulating attributes. | |
957 | */ | |
958 | ||
959 | int | |
960 | zap_lookup(objset_t *os, uint64_t zapobj, const char *name, | |
961 | uint64_t integer_size, uint64_t num_integers, void *buf) | |
962 | { | |
963 | return (zap_lookup_norm(os, zapobj, name, integer_size, | |
964 | num_integers, buf, 0, NULL, 0, NULL)); | |
965 | } | |
966 | ||
967 | static int | |
968 | zap_lookup_impl(zap_t *zap, const char *name, | |
969 | uint64_t integer_size, uint64_t num_integers, void *buf, | |
970 | matchtype_t mt, char *realname, int rn_len, | |
971 | boolean_t *ncp) | |
972 | { | |
973 | int err = 0; | |
974 | ||
975 | zap_name_t *zn = zap_name_alloc(zap, name, mt); | |
976 | if (zn == NULL) | |
977 | return (SET_ERROR(ENOTSUP)); | |
978 | ||
979 | if (!zap->zap_ismicro) { | |
980 | err = fzap_lookup(zn, integer_size, num_integers, buf, | |
981 | realname, rn_len, ncp); | |
982 | } else { | |
983 | mzap_ent_t *mze = mze_find(zn); | |
984 | if (mze == NULL) { | |
985 | err = SET_ERROR(ENOENT); | |
986 | } else { | |
987 | if (num_integers < 1) { | |
988 | err = SET_ERROR(EOVERFLOW); | |
989 | } else if (integer_size != 8) { | |
990 | err = SET_ERROR(EINVAL); | |
991 | } else { | |
992 | *(uint64_t *)buf = | |
993 | MZE_PHYS(zap, mze)->mze_value; | |
994 | (void) strlcpy(realname, | |
995 | MZE_PHYS(zap, mze)->mze_name, rn_len); | |
996 | if (ncp) { | |
997 | *ncp = mzap_normalization_conflict(zap, | |
998 | zn, mze); | |
999 | } | |
1000 | } | |
1001 | } | |
1002 | } | |
1003 | zap_name_free(zn); | |
1004 | return (err); | |
1005 | } | |
1006 | ||
1007 | int | |
1008 | zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, | |
1009 | uint64_t integer_size, uint64_t num_integers, void *buf, | |
1010 | matchtype_t mt, char *realname, int rn_len, | |
1011 | boolean_t *ncp) | |
1012 | { | |
1013 | zap_t *zap; | |
1014 | ||
1015 | int err = | |
1016 | zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); | |
1017 | if (err != 0) | |
1018 | return (err); | |
1019 | err = zap_lookup_impl(zap, name, integer_size, | |
1020 | num_integers, buf, mt, realname, rn_len, ncp); | |
1021 | zap_unlockdir(zap, FTAG); | |
1022 | return (err); | |
1023 | } | |
1024 | ||
1025 | int | |
1026 | zap_prefetch(objset_t *os, uint64_t zapobj, const char *name) | |
1027 | { | |
1028 | zap_t *zap; | |
1029 | int err; | |
1030 | zap_name_t *zn; | |
1031 | ||
1032 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); | |
1033 | if (err) | |
1034 | return (err); | |
1035 | zn = zap_name_alloc(zap, name, 0); | |
1036 | if (zn == NULL) { | |
1037 | zap_unlockdir(zap, FTAG); | |
1038 | return (SET_ERROR(ENOTSUP)); | |
1039 | } | |
1040 | ||
1041 | fzap_prefetch(zn); | |
1042 | zap_name_free(zn); | |
1043 | zap_unlockdir(zap, FTAG); | |
1044 | return (err); | |
1045 | } | |
1046 | ||
1047 | int | |
1048 | zap_lookup_by_dnode(dnode_t *dn, const char *name, | |
1049 | uint64_t integer_size, uint64_t num_integers, void *buf) | |
1050 | { | |
1051 | return (zap_lookup_norm_by_dnode(dn, name, integer_size, | |
1052 | num_integers, buf, 0, NULL, 0, NULL)); | |
1053 | } | |
1054 | ||
1055 | int | |
1056 | zap_lookup_norm_by_dnode(dnode_t *dn, const char *name, | |
1057 | uint64_t integer_size, uint64_t num_integers, void *buf, | |
1058 | matchtype_t mt, char *realname, int rn_len, | |
1059 | boolean_t *ncp) | |
1060 | { | |
1061 | zap_t *zap; | |
1062 | ||
1063 | int err = zap_lockdir_by_dnode(dn, NULL, RW_READER, TRUE, FALSE, | |
1064 | FTAG, &zap); | |
1065 | if (err != 0) | |
1066 | return (err); | |
1067 | err = zap_lookup_impl(zap, name, integer_size, | |
1068 | num_integers, buf, mt, realname, rn_len, ncp); | |
1069 | zap_unlockdir(zap, FTAG); | |
1070 | return (err); | |
1071 | } | |
1072 | ||
1073 | int | |
1074 | zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1075 | int key_numints) | |
1076 | { | |
1077 | zap_t *zap; | |
1078 | ||
1079 | int err = | |
1080 | zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); | |
1081 | if (err != 0) | |
1082 | return (err); | |
1083 | zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1084 | if (zn == NULL) { | |
1085 | zap_unlockdir(zap, FTAG); | |
1086 | return (SET_ERROR(ENOTSUP)); | |
1087 | } | |
1088 | ||
1089 | fzap_prefetch(zn); | |
1090 | zap_name_free(zn); | |
1091 | zap_unlockdir(zap, FTAG); | |
1092 | return (err); | |
1093 | } | |
1094 | ||
1095 | int | |
1096 | zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1097 | int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) | |
1098 | { | |
1099 | zap_t *zap; | |
1100 | ||
1101 | int err = | |
1102 | zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); | |
1103 | if (err != 0) | |
1104 | return (err); | |
1105 | zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1106 | if (zn == NULL) { | |
1107 | zap_unlockdir(zap, FTAG); | |
1108 | return (SET_ERROR(ENOTSUP)); | |
1109 | } | |
1110 | ||
1111 | err = fzap_lookup(zn, integer_size, num_integers, buf, | |
1112 | NULL, 0, NULL); | |
1113 | zap_name_free(zn); | |
1114 | zap_unlockdir(zap, FTAG); | |
1115 | return (err); | |
1116 | } | |
1117 | ||
1118 | int | |
1119 | zap_contains(objset_t *os, uint64_t zapobj, const char *name) | |
1120 | { | |
1121 | int err = zap_lookup_norm(os, zapobj, name, 0, | |
1122 | 0, NULL, 0, NULL, 0, NULL); | |
1123 | if (err == EOVERFLOW || err == EINVAL) | |
1124 | err = 0; /* found, but skipped reading the value */ | |
1125 | return (err); | |
1126 | } | |
1127 | ||
1128 | int | |
1129 | zap_length(objset_t *os, uint64_t zapobj, const char *name, | |
1130 | uint64_t *integer_size, uint64_t *num_integers) | |
1131 | { | |
1132 | zap_t *zap; | |
1133 | ||
1134 | int err = | |
1135 | zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); | |
1136 | if (err != 0) | |
1137 | return (err); | |
1138 | zap_name_t *zn = zap_name_alloc(zap, name, 0); | |
1139 | if (zn == NULL) { | |
1140 | zap_unlockdir(zap, FTAG); | |
1141 | return (SET_ERROR(ENOTSUP)); | |
1142 | } | |
1143 | if (!zap->zap_ismicro) { | |
1144 | err = fzap_length(zn, integer_size, num_integers); | |
1145 | } else { | |
1146 | mzap_ent_t *mze = mze_find(zn); | |
1147 | if (mze == NULL) { | |
1148 | err = SET_ERROR(ENOENT); | |
1149 | } else { | |
1150 | if (integer_size) | |
1151 | *integer_size = 8; | |
1152 | if (num_integers) | |
1153 | *num_integers = 1; | |
1154 | } | |
1155 | } | |
1156 | zap_name_free(zn); | |
1157 | zap_unlockdir(zap, FTAG); | |
1158 | return (err); | |
1159 | } | |
1160 | ||
1161 | int | |
1162 | zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1163 | int key_numints, uint64_t *integer_size, uint64_t *num_integers) | |
1164 | { | |
1165 | zap_t *zap; | |
1166 | ||
1167 | int err = | |
1168 | zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); | |
1169 | if (err != 0) | |
1170 | return (err); | |
1171 | zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1172 | if (zn == NULL) { | |
1173 | zap_unlockdir(zap, FTAG); | |
1174 | return (SET_ERROR(ENOTSUP)); | |
1175 | } | |
1176 | err = fzap_length(zn, integer_size, num_integers); | |
1177 | zap_name_free(zn); | |
1178 | zap_unlockdir(zap, FTAG); | |
1179 | return (err); | |
1180 | } | |
1181 | ||
1182 | static void | |
1183 | mzap_addent(zap_name_t *zn, uint64_t value) | |
1184 | { | |
1185 | zap_t *zap = zn->zn_zap; | |
1186 | int start = zap->zap_m.zap_alloc_next; | |
1187 | ||
1188 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
1189 | ||
1190 | #ifdef ZFS_DEBUG | |
1191 | for (int i = 0; i < zap->zap_m.zap_num_chunks; i++) { | |
1192 | mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; | |
1193 | ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); | |
1194 | } | |
1195 | #endif | |
1196 | ||
1197 | uint32_t cd = mze_find_unused_cd(zap, zn->zn_hash); | |
1198 | /* given the limited size of the microzap, this can't happen */ | |
1199 | ASSERT(cd < zap_maxcd(zap)); | |
1200 | ||
1201 | again: | |
1202 | for (int i = start; i < zap->zap_m.zap_num_chunks; i++) { | |
1203 | mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; | |
1204 | if (mze->mze_name[0] == 0) { | |
1205 | mze->mze_value = value; | |
1206 | mze->mze_cd = cd; | |
1207 | (void) strlcpy(mze->mze_name, zn->zn_key_orig, | |
1208 | sizeof (mze->mze_name)); | |
1209 | zap->zap_m.zap_num_entries++; | |
1210 | zap->zap_m.zap_alloc_next = i+1; | |
1211 | if (zap->zap_m.zap_alloc_next == | |
1212 | zap->zap_m.zap_num_chunks) | |
1213 | zap->zap_m.zap_alloc_next = 0; | |
1214 | mze_insert(zap, i, zn->zn_hash); | |
1215 | return; | |
1216 | } | |
1217 | } | |
1218 | if (start != 0) { | |
1219 | start = 0; | |
1220 | goto again; | |
1221 | } | |
1222 | cmn_err(CE_PANIC, "out of entries!"); | |
1223 | } | |
1224 | ||
1225 | static int | |
1226 | zap_add_impl(zap_t *zap, const char *key, | |
1227 | int integer_size, uint64_t num_integers, | |
1228 | const void *val, dmu_tx_t *tx, void *tag) | |
1229 | { | |
1230 | const uint64_t *intval = val; | |
1231 | int err = 0; | |
1232 | ||
1233 | zap_name_t *zn = zap_name_alloc(zap, key, 0); | |
1234 | if (zn == NULL) { | |
1235 | zap_unlockdir(zap, tag); | |
1236 | return (SET_ERROR(ENOTSUP)); | |
1237 | } | |
1238 | if (!zap->zap_ismicro) { | |
1239 | err = fzap_add(zn, integer_size, num_integers, val, tag, tx); | |
1240 | zap = zn->zn_zap; /* fzap_add() may change zap */ | |
1241 | } else if (integer_size != 8 || num_integers != 1 || | |
1242 | strlen(key) >= MZAP_NAME_LEN || | |
1243 | !mze_canfit_fzap_leaf(zn, zn->zn_hash)) { | |
1244 | err = mzap_upgrade(&zn->zn_zap, tag, tx, 0); | |
1245 | if (err == 0) { | |
1246 | err = fzap_add(zn, integer_size, num_integers, val, | |
1247 | tag, tx); | |
1248 | } | |
1249 | zap = zn->zn_zap; /* fzap_add() may change zap */ | |
1250 | } else { | |
1251 | if (mze_find(zn) != NULL) { | |
1252 | err = SET_ERROR(EEXIST); | |
1253 | } else { | |
1254 | mzap_addent(zn, *intval); | |
1255 | } | |
1256 | } | |
1257 | ASSERT(zap == zn->zn_zap); | |
1258 | zap_name_free(zn); | |
1259 | if (zap != NULL) /* may be NULL if fzap_add() failed */ | |
1260 | zap_unlockdir(zap, tag); | |
1261 | return (err); | |
1262 | } | |
1263 | ||
1264 | int | |
1265 | zap_add(objset_t *os, uint64_t zapobj, const char *key, | |
1266 | int integer_size, uint64_t num_integers, | |
1267 | const void *val, dmu_tx_t *tx) | |
1268 | { | |
1269 | zap_t *zap; | |
1270 | int err; | |
1271 | ||
1272 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); | |
1273 | if (err != 0) | |
1274 | return (err); | |
1275 | err = zap_add_impl(zap, key, integer_size, num_integers, val, tx, FTAG); | |
1276 | /* zap_add_impl() calls zap_unlockdir() */ | |
1277 | return (err); | |
1278 | } | |
1279 | ||
1280 | int | |
1281 | zap_add_by_dnode(dnode_t *dn, const char *key, | |
1282 | int integer_size, uint64_t num_integers, | |
1283 | const void *val, dmu_tx_t *tx) | |
1284 | { | |
1285 | zap_t *zap; | |
1286 | int err; | |
1287 | ||
1288 | err = zap_lockdir_by_dnode(dn, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); | |
1289 | if (err != 0) | |
1290 | return (err); | |
1291 | err = zap_add_impl(zap, key, integer_size, num_integers, val, tx, FTAG); | |
1292 | /* zap_add_impl() calls zap_unlockdir() */ | |
1293 | return (err); | |
1294 | } | |
1295 | ||
1296 | int | |
1297 | zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1298 | int key_numints, int integer_size, uint64_t num_integers, | |
1299 | const void *val, dmu_tx_t *tx) | |
1300 | { | |
1301 | zap_t *zap; | |
1302 | ||
1303 | int err = | |
1304 | zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); | |
1305 | if (err != 0) | |
1306 | return (err); | |
1307 | zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1308 | if (zn == NULL) { | |
1309 | zap_unlockdir(zap, FTAG); | |
1310 | return (SET_ERROR(ENOTSUP)); | |
1311 | } | |
1312 | err = fzap_add(zn, integer_size, num_integers, val, FTAG, tx); | |
1313 | zap = zn->zn_zap; /* fzap_add() may change zap */ | |
1314 | zap_name_free(zn); | |
1315 | if (zap != NULL) /* may be NULL if fzap_add() failed */ | |
1316 | zap_unlockdir(zap, FTAG); | |
1317 | return (err); | |
1318 | } | |
1319 | ||
1320 | int | |
1321 | zap_update(objset_t *os, uint64_t zapobj, const char *name, | |
1322 | int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) | |
1323 | { | |
1324 | zap_t *zap; | |
1325 | const uint64_t *intval = val; | |
1326 | ||
1327 | int err = | |
1328 | zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); | |
1329 | if (err != 0) | |
1330 | return (err); | |
1331 | zap_name_t *zn = zap_name_alloc(zap, name, 0); | |
1332 | if (zn == NULL) { | |
1333 | zap_unlockdir(zap, FTAG); | |
1334 | return (SET_ERROR(ENOTSUP)); | |
1335 | } | |
1336 | if (!zap->zap_ismicro) { | |
1337 | err = fzap_update(zn, integer_size, num_integers, val, | |
1338 | FTAG, tx); | |
1339 | zap = zn->zn_zap; /* fzap_update() may change zap */ | |
1340 | } else if (integer_size != 8 || num_integers != 1 || | |
1341 | strlen(name) >= MZAP_NAME_LEN) { | |
1342 | dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", | |
1343 | zapobj, integer_size, num_integers, name); | |
1344 | err = mzap_upgrade(&zn->zn_zap, FTAG, tx, 0); | |
1345 | if (err == 0) { | |
1346 | err = fzap_update(zn, integer_size, num_integers, | |
1347 | val, FTAG, tx); | |
1348 | } | |
1349 | zap = zn->zn_zap; /* fzap_update() may change zap */ | |
1350 | } else { | |
1351 | mzap_ent_t *mze = mze_find(zn); | |
1352 | if (mze != NULL) { | |
1353 | MZE_PHYS(zap, mze)->mze_value = *intval; | |
1354 | } else { | |
1355 | mzap_addent(zn, *intval); | |
1356 | } | |
1357 | } | |
1358 | ASSERT(zap == zn->zn_zap); | |
1359 | zap_name_free(zn); | |
1360 | if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ | |
1361 | zap_unlockdir(zap, FTAG); | |
1362 | return (err); | |
1363 | } | |
1364 | ||
1365 | int | |
1366 | zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1367 | int key_numints, | |
1368 | int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) | |
1369 | { | |
1370 | zap_t *zap; | |
1371 | ||
1372 | int err = | |
1373 | zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); | |
1374 | if (err != 0) | |
1375 | return (err); | |
1376 | zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1377 | if (zn == NULL) { | |
1378 | zap_unlockdir(zap, FTAG); | |
1379 | return (SET_ERROR(ENOTSUP)); | |
1380 | } | |
1381 | err = fzap_update(zn, integer_size, num_integers, val, FTAG, tx); | |
1382 | zap = zn->zn_zap; /* fzap_update() may change zap */ | |
1383 | zap_name_free(zn); | |
1384 | if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ | |
1385 | zap_unlockdir(zap, FTAG); | |
1386 | return (err); | |
1387 | } | |
1388 | ||
1389 | int | |
1390 | zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) | |
1391 | { | |
1392 | return (zap_remove_norm(os, zapobj, name, 0, tx)); | |
1393 | } | |
1394 | ||
1395 | static int | |
1396 | zap_remove_impl(zap_t *zap, const char *name, | |
1397 | matchtype_t mt, dmu_tx_t *tx) | |
1398 | { | |
1399 | int err = 0; | |
1400 | ||
1401 | zap_name_t *zn = zap_name_alloc(zap, name, mt); | |
1402 | if (zn == NULL) | |
1403 | return (SET_ERROR(ENOTSUP)); | |
1404 | if (!zap->zap_ismicro) { | |
1405 | err = fzap_remove(zn, tx); | |
1406 | } else { | |
1407 | mzap_ent_t *mze = mze_find(zn); | |
1408 | if (mze == NULL) { | |
1409 | err = SET_ERROR(ENOENT); | |
1410 | } else { | |
1411 | zap->zap_m.zap_num_entries--; | |
1412 | bzero(&zap_m_phys(zap)->mz_chunk[mze->mze_chunkid], | |
1413 | sizeof (mzap_ent_phys_t)); | |
1414 | mze_remove(zap, mze); | |
1415 | } | |
1416 | } | |
1417 | zap_name_free(zn); | |
1418 | return (err); | |
1419 | } | |
1420 | ||
1421 | int | |
1422 | zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, | |
1423 | matchtype_t mt, dmu_tx_t *tx) | |
1424 | { | |
1425 | zap_t *zap; | |
1426 | int err; | |
1427 | ||
1428 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); | |
1429 | if (err) | |
1430 | return (err); | |
1431 | err = zap_remove_impl(zap, name, mt, tx); | |
1432 | zap_unlockdir(zap, FTAG); | |
1433 | return (err); | |
1434 | } | |
1435 | ||
1436 | int | |
1437 | zap_remove_by_dnode(dnode_t *dn, const char *name, dmu_tx_t *tx) | |
1438 | { | |
1439 | zap_t *zap; | |
1440 | int err; | |
1441 | ||
1442 | err = zap_lockdir_by_dnode(dn, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); | |
1443 | if (err) | |
1444 | return (err); | |
1445 | err = zap_remove_impl(zap, name, 0, tx); | |
1446 | zap_unlockdir(zap, FTAG); | |
1447 | return (err); | |
1448 | } | |
1449 | ||
1450 | int | |
1451 | zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1452 | int key_numints, dmu_tx_t *tx) | |
1453 | { | |
1454 | zap_t *zap; | |
1455 | ||
1456 | int err = | |
1457 | zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); | |
1458 | if (err != 0) | |
1459 | return (err); | |
1460 | zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1461 | if (zn == NULL) { | |
1462 | zap_unlockdir(zap, FTAG); | |
1463 | return (SET_ERROR(ENOTSUP)); | |
1464 | } | |
1465 | err = fzap_remove(zn, tx); | |
1466 | zap_name_free(zn); | |
1467 | zap_unlockdir(zap, FTAG); | |
1468 | return (err); | |
1469 | } | |
1470 | ||
1471 | /* | |
1472 | * Routines for iterating over the attributes. | |
1473 | */ | |
1474 | ||
1475 | static void | |
1476 | zap_cursor_init_impl(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, | |
1477 | uint64_t serialized, boolean_t prefetch) | |
1478 | { | |
1479 | zc->zc_objset = os; | |
1480 | zc->zc_zap = NULL; | |
1481 | zc->zc_leaf = NULL; | |
1482 | zc->zc_zapobj = zapobj; | |
1483 | zc->zc_serialized = serialized; | |
1484 | zc->zc_hash = 0; | |
1485 | zc->zc_cd = 0; | |
1486 | zc->zc_prefetch = prefetch; | |
1487 | } | |
1488 | void | |
1489 | zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, | |
1490 | uint64_t serialized) | |
1491 | { | |
1492 | zap_cursor_init_impl(zc, os, zapobj, serialized, B_TRUE); | |
1493 | } | |
1494 | ||
1495 | /* | |
1496 | * Initialize a cursor at the beginning of the ZAP object. The entire | |
1497 | * ZAP object will be prefetched. | |
1498 | */ | |
1499 | void | |
1500 | zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) | |
1501 | { | |
1502 | zap_cursor_init_impl(zc, os, zapobj, 0, B_TRUE); | |
1503 | } | |
1504 | ||
1505 | /* | |
1506 | * Initialize a cursor at the beginning, but request that we not prefetch | |
1507 | * the entire ZAP object. | |
1508 | */ | |
1509 | void | |
1510 | zap_cursor_init_noprefetch(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) | |
1511 | { | |
1512 | zap_cursor_init_impl(zc, os, zapobj, 0, B_FALSE); | |
1513 | } | |
1514 | ||
1515 | void | |
1516 | zap_cursor_fini(zap_cursor_t *zc) | |
1517 | { | |
1518 | if (zc->zc_zap) { | |
1519 | rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); | |
1520 | zap_unlockdir(zc->zc_zap, NULL); | |
1521 | zc->zc_zap = NULL; | |
1522 | } | |
1523 | if (zc->zc_leaf) { | |
1524 | rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); | |
1525 | zap_put_leaf(zc->zc_leaf); | |
1526 | zc->zc_leaf = NULL; | |
1527 | } | |
1528 | zc->zc_objset = NULL; | |
1529 | } | |
1530 | ||
1531 | uint64_t | |
1532 | zap_cursor_serialize(zap_cursor_t *zc) | |
1533 | { | |
1534 | if (zc->zc_hash == -1ULL) | |
1535 | return (-1ULL); | |
1536 | if (zc->zc_zap == NULL) | |
1537 | return (zc->zc_serialized); | |
1538 | ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); | |
1539 | ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); | |
1540 | ||
1541 | /* | |
1542 | * We want to keep the high 32 bits of the cursor zero if we can, so | |
1543 | * that 32-bit programs can access this. So usually use a small | |
1544 | * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits | |
1545 | * of the cursor. | |
1546 | * | |
1547 | * [ collision differentiator | zap_hashbits()-bit hash value ] | |
1548 | */ | |
1549 | return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | | |
1550 | ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); | |
1551 | } | |
1552 | ||
1553 | int | |
1554 | zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) | |
1555 | { | |
1556 | int err; | |
1557 | ||
1558 | if (zc->zc_hash == -1ULL) | |
1559 | return (SET_ERROR(ENOENT)); | |
1560 | ||
1561 | if (zc->zc_zap == NULL) { | |
1562 | int hb; | |
1563 | err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, | |
1564 | RW_READER, TRUE, FALSE, NULL, &zc->zc_zap); | |
1565 | if (err != 0) | |
1566 | return (err); | |
1567 | ||
1568 | /* | |
1569 | * To support zap_cursor_init_serialized, advance, retrieve, | |
1570 | * we must add to the existing zc_cd, which may already | |
1571 | * be 1 due to the zap_cursor_advance. | |
1572 | */ | |
1573 | ASSERT(zc->zc_hash == 0); | |
1574 | hb = zap_hashbits(zc->zc_zap); | |
1575 | zc->zc_hash = zc->zc_serialized << (64 - hb); | |
1576 | zc->zc_cd += zc->zc_serialized >> hb; | |
1577 | if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ | |
1578 | zc->zc_cd = 0; | |
1579 | } else { | |
1580 | rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); | |
1581 | } | |
1582 | if (!zc->zc_zap->zap_ismicro) { | |
1583 | err = fzap_cursor_retrieve(zc->zc_zap, zc, za); | |
1584 | } else { | |
1585 | avl_index_t idx; | |
1586 | mzap_ent_t mze_tofind; | |
1587 | ||
1588 | mze_tofind.mze_hash = zc->zc_hash; | |
1589 | mze_tofind.mze_cd = zc->zc_cd; | |
1590 | ||
1591 | mzap_ent_t *mze = | |
1592 | avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); | |
1593 | if (mze == NULL) { | |
1594 | mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, | |
1595 | idx, AVL_AFTER); | |
1596 | } | |
1597 | if (mze) { | |
1598 | mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); | |
1599 | ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); | |
1600 | za->za_normalization_conflict = | |
1601 | mzap_normalization_conflict(zc->zc_zap, NULL, mze); | |
1602 | za->za_integer_length = 8; | |
1603 | za->za_num_integers = 1; | |
1604 | za->za_first_integer = mzep->mze_value; | |
1605 | (void) strcpy(za->za_name, mzep->mze_name); | |
1606 | zc->zc_hash = mze->mze_hash; | |
1607 | zc->zc_cd = mze->mze_cd; | |
1608 | err = 0; | |
1609 | } else { | |
1610 | zc->zc_hash = -1ULL; | |
1611 | err = SET_ERROR(ENOENT); | |
1612 | } | |
1613 | } | |
1614 | rw_exit(&zc->zc_zap->zap_rwlock); | |
1615 | return (err); | |
1616 | } | |
1617 | ||
1618 | void | |
1619 | zap_cursor_advance(zap_cursor_t *zc) | |
1620 | { | |
1621 | if (zc->zc_hash == -1ULL) | |
1622 | return; | |
1623 | zc->zc_cd++; | |
1624 | } | |
1625 | ||
1626 | int | |
1627 | zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) | |
1628 | { | |
1629 | zap_t *zap; | |
1630 | ||
1631 | int err = | |
1632 | zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); | |
1633 | if (err != 0) | |
1634 | return (err); | |
1635 | ||
1636 | bzero(zs, sizeof (zap_stats_t)); | |
1637 | ||
1638 | if (zap->zap_ismicro) { | |
1639 | zs->zs_blocksize = zap->zap_dbuf->db_size; | |
1640 | zs->zs_num_entries = zap->zap_m.zap_num_entries; | |
1641 | zs->zs_num_blocks = 1; | |
1642 | } else { | |
1643 | fzap_get_stats(zap, zs); | |
1644 | } | |
1645 | zap_unlockdir(zap, FTAG); | |
1646 | return (0); | |
1647 | } | |
1648 | ||
1649 | #if defined(_KERNEL) | |
1650 | EXPORT_SYMBOL(zap_create); | |
1651 | EXPORT_SYMBOL(zap_create_dnsize); | |
1652 | EXPORT_SYMBOL(zap_create_norm); | |
1653 | EXPORT_SYMBOL(zap_create_norm_dnsize); | |
1654 | EXPORT_SYMBOL(zap_create_flags); | |
1655 | EXPORT_SYMBOL(zap_create_flags_dnsize); | |
1656 | EXPORT_SYMBOL(zap_create_claim); | |
1657 | EXPORT_SYMBOL(zap_create_claim_norm); | |
1658 | EXPORT_SYMBOL(zap_create_claim_norm_dnsize); | |
1659 | EXPORT_SYMBOL(zap_create_hold); | |
1660 | EXPORT_SYMBOL(zap_destroy); | |
1661 | EXPORT_SYMBOL(zap_lookup); | |
1662 | EXPORT_SYMBOL(zap_lookup_by_dnode); | |
1663 | EXPORT_SYMBOL(zap_lookup_norm); | |
1664 | EXPORT_SYMBOL(zap_lookup_uint64); | |
1665 | EXPORT_SYMBOL(zap_contains); | |
1666 | EXPORT_SYMBOL(zap_prefetch); | |
1667 | EXPORT_SYMBOL(zap_prefetch_uint64); | |
1668 | EXPORT_SYMBOL(zap_add); | |
1669 | EXPORT_SYMBOL(zap_add_by_dnode); | |
1670 | EXPORT_SYMBOL(zap_add_uint64); | |
1671 | EXPORT_SYMBOL(zap_update); | |
1672 | EXPORT_SYMBOL(zap_update_uint64); | |
1673 | EXPORT_SYMBOL(zap_length); | |
1674 | EXPORT_SYMBOL(zap_length_uint64); | |
1675 | EXPORT_SYMBOL(zap_remove); | |
1676 | EXPORT_SYMBOL(zap_remove_by_dnode); | |
1677 | EXPORT_SYMBOL(zap_remove_norm); | |
1678 | EXPORT_SYMBOL(zap_remove_uint64); | |
1679 | EXPORT_SYMBOL(zap_count); | |
1680 | EXPORT_SYMBOL(zap_value_search); | |
1681 | EXPORT_SYMBOL(zap_join); | |
1682 | EXPORT_SYMBOL(zap_join_increment); | |
1683 | EXPORT_SYMBOL(zap_add_int); | |
1684 | EXPORT_SYMBOL(zap_remove_int); | |
1685 | EXPORT_SYMBOL(zap_lookup_int); | |
1686 | EXPORT_SYMBOL(zap_increment_int); | |
1687 | EXPORT_SYMBOL(zap_add_int_key); | |
1688 | EXPORT_SYMBOL(zap_lookup_int_key); | |
1689 | EXPORT_SYMBOL(zap_increment); | |
1690 | EXPORT_SYMBOL(zap_cursor_init); | |
1691 | EXPORT_SYMBOL(zap_cursor_fini); | |
1692 | EXPORT_SYMBOL(zap_cursor_retrieve); | |
1693 | EXPORT_SYMBOL(zap_cursor_advance); | |
1694 | EXPORT_SYMBOL(zap_cursor_serialize); | |
1695 | EXPORT_SYMBOL(zap_cursor_init_serialized); | |
1696 | EXPORT_SYMBOL(zap_get_stats); | |
1697 | #endif |