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34dc7c2f BB |
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 | */ | |
9b7b9cd3 | 21 | |
34dc7c2f | 22 | /* |
428870ff | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
8bea9815 | 24 | * Copyright (c) 2011, 2016 by Delphix. All rights reserved. |
0c66c32d | 25 | * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. |
9b7b9cd3 | 26 | * Copyright 2017 Nexenta Systems, Inc. |
34dc7c2f BB |
27 | */ |
28 | ||
428870ff | 29 | #include <sys/zio.h> |
34dc7c2f BB |
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> | |
428870ff | 38 | #include <sys/arc.h> |
f1512ee6 | 39 | #include <sys/dmu_objset.h> |
34dc7c2f BB |
40 | |
41 | #ifdef _KERNEL | |
42 | #include <sys/sunddi.h> | |
43 | #endif | |
44 | ||
d683ddbb JG |
45 | extern inline mzap_phys_t *zap_m_phys(zap_t *zap); |
46 | ||
8bea9815 MA |
47 | static int mzap_upgrade(zap_t **zapp, |
48 | void *tag, dmu_tx_t *tx, zap_flags_t flags); | |
34dc7c2f | 49 | |
428870ff BB |
50 | uint64_t |
51 | zap_getflags(zap_t *zap) | |
52 | { | |
53 | if (zap->zap_ismicro) | |
54 | return (0); | |
d683ddbb | 55 | return (zap_f_phys(zap)->zap_flags); |
428870ff | 56 | } |
34dc7c2f | 57 | |
428870ff BB |
58 | int |
59 | zap_hashbits(zap_t *zap) | |
34dc7c2f | 60 | { |
428870ff BB |
61 | if (zap_getflags(zap) & ZAP_FLAG_HASH64) |
62 | return (48); | |
63 | else | |
64 | return (28); | |
65 | } | |
34dc7c2f | 66 | |
428870ff BB |
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 | } | |
34dc7c2f | 75 | |
428870ff BB |
76 | static uint64_t |
77 | zap_hash(zap_name_t *zn) | |
78 | { | |
79 | zap_t *zap = zn->zn_zap; | |
80 | uint64_t h = 0; | |
34dc7c2f | 81 | |
428870ff BB |
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 | int i; | |
92 | const uint64_t *wp = zn->zn_key_norm; | |
93 | ||
94 | ASSERT(zn->zn_key_intlen == 8); | |
95 | for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { | |
96 | int j; | |
97 | uint64_t word = *wp; | |
98 | ||
99 | for (j = 0; j < zn->zn_key_intlen; j++) { | |
100 | h = (h >> 8) ^ | |
101 | zfs_crc64_table[(h ^ word) & 0xFF]; | |
102 | word >>= NBBY; | |
103 | } | |
104 | } | |
105 | } else { | |
106 | int i, len; | |
107 | const uint8_t *cp = zn->zn_key_norm; | |
108 | ||
109 | /* | |
110 | * We previously stored the terminating null on | |
111 | * disk, but didn't hash it, so we need to | |
112 | * continue to not hash it. (The | |
113 | * zn_key_*_numints includes the terminating | |
114 | * null for non-binary keys.) | |
115 | */ | |
116 | len = zn->zn_key_norm_numints - 1; | |
117 | ||
118 | ASSERT(zn->zn_key_intlen == 1); | |
119 | for (i = 0; i < len; cp++, i++) { | |
120 | h = (h >> 8) ^ | |
121 | zfs_crc64_table[(h ^ *cp) & 0xFF]; | |
122 | } | |
123 | } | |
124 | } | |
34dc7c2f | 125 | /* |
428870ff BB |
126 | * Don't use all 64 bits, since we need some in the cookie for |
127 | * the collision differentiator. We MUST use the high bits, | |
128 | * since those are the ones that we first pay attention to when | |
4e33ba4c | 129 | * choosing the bucket. |
34dc7c2f | 130 | */ |
428870ff | 131 | h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); |
34dc7c2f | 132 | |
428870ff | 133 | return (h); |
34dc7c2f BB |
134 | } |
135 | ||
136 | static int | |
9b7b9cd3 | 137 | zap_normalize(zap_t *zap, const char *name, char *namenorm, int normflags) |
34dc7c2f BB |
138 | { |
139 | size_t inlen, outlen; | |
140 | int err; | |
141 | ||
428870ff BB |
142 | ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); |
143 | ||
34dc7c2f BB |
144 | inlen = strlen(name) + 1; |
145 | outlen = ZAP_MAXNAMELEN; | |
146 | ||
147 | err = 0; | |
148 | (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, | |
9b7b9cd3 GM |
149 | normflags | U8_TEXTPREP_IGNORE_NULL | U8_TEXTPREP_IGNORE_INVALID, |
150 | U8_UNICODE_LATEST, &err); | |
34dc7c2f BB |
151 | |
152 | return (err); | |
153 | } | |
154 | ||
155 | boolean_t | |
156 | zap_match(zap_name_t *zn, const char *matchname) | |
157 | { | |
428870ff BB |
158 | ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); |
159 | ||
9b7b9cd3 | 160 | if (zn->zn_matchtype & MT_NORMALIZE) { |
34dc7c2f BB |
161 | char norm[ZAP_MAXNAMELEN]; |
162 | ||
9b7b9cd3 GM |
163 | if (zap_normalize(zn->zn_zap, matchname, norm, |
164 | zn->zn_normflags) != 0) | |
34dc7c2f BB |
165 | return (B_FALSE); |
166 | ||
428870ff | 167 | return (strcmp(zn->zn_key_norm, norm) == 0); |
34dc7c2f | 168 | } else { |
428870ff | 169 | return (strcmp(zn->zn_key_orig, matchname) == 0); |
34dc7c2f BB |
170 | } |
171 | } | |
172 | ||
173 | void | |
174 | zap_name_free(zap_name_t *zn) | |
175 | { | |
176 | kmem_free(zn, sizeof (zap_name_t)); | |
177 | } | |
178 | ||
34dc7c2f | 179 | zap_name_t * |
428870ff | 180 | zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) |
34dc7c2f | 181 | { |
79c76d5b | 182 | zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); |
34dc7c2f BB |
183 | |
184 | zn->zn_zap = zap; | |
428870ff BB |
185 | zn->zn_key_intlen = sizeof (*key); |
186 | zn->zn_key_orig = key; | |
187 | zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; | |
34dc7c2f | 188 | zn->zn_matchtype = mt; |
9b7b9cd3 GM |
189 | zn->zn_normflags = zap->zap_normflags; |
190 | ||
191 | /* | |
192 | * If we're dealing with a case sensitive lookup on a mixed or | |
193 | * insensitive fs, remove U8_TEXTPREP_TOUPPER or the lookup | |
194 | * will fold case to all caps overriding the lookup request. | |
195 | */ | |
196 | if (mt & MT_MATCH_CASE) | |
197 | zn->zn_normflags &= ~U8_TEXTPREP_TOUPPER; | |
198 | ||
34dc7c2f | 199 | if (zap->zap_normflags) { |
9b7b9cd3 GM |
200 | /* |
201 | * We *must* use zap_normflags because this normalization is | |
202 | * what the hash is computed from. | |
203 | */ | |
204 | if (zap_normalize(zap, key, zn->zn_normbuf, | |
205 | zap->zap_normflags) != 0) { | |
34dc7c2f BB |
206 | zap_name_free(zn); |
207 | return (NULL); | |
208 | } | |
428870ff BB |
209 | zn->zn_key_norm = zn->zn_normbuf; |
210 | zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; | |
34dc7c2f | 211 | } else { |
9b7b9cd3 | 212 | if (mt != 0) { |
34dc7c2f BB |
213 | zap_name_free(zn); |
214 | return (NULL); | |
215 | } | |
428870ff BB |
216 | zn->zn_key_norm = zn->zn_key_orig; |
217 | zn->zn_key_norm_numints = zn->zn_key_orig_numints; | |
34dc7c2f BB |
218 | } |
219 | ||
428870ff | 220 | zn->zn_hash = zap_hash(zn); |
9b7b9cd3 GM |
221 | |
222 | if (zap->zap_normflags != zn->zn_normflags) { | |
223 | /* | |
224 | * We *must* use zn_normflags because this normalization is | |
225 | * what the matching is based on. (Not the hash!) | |
226 | */ | |
227 | if (zap_normalize(zap, key, zn->zn_normbuf, | |
228 | zn->zn_normflags) != 0) { | |
229 | zap_name_free(zn); | |
230 | return (NULL); | |
231 | } | |
232 | zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; | |
233 | } | |
234 | ||
428870ff BB |
235 | return (zn); |
236 | } | |
237 | ||
238 | zap_name_t * | |
239 | zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) | |
240 | { | |
79c76d5b | 241 | zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); |
428870ff BB |
242 | |
243 | ASSERT(zap->zap_normflags == 0); | |
244 | zn->zn_zap = zap; | |
245 | zn->zn_key_intlen = sizeof (*key); | |
246 | zn->zn_key_orig = zn->zn_key_norm = key; | |
247 | zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; | |
9b7b9cd3 | 248 | zn->zn_matchtype = 0; |
428870ff BB |
249 | |
250 | zn->zn_hash = zap_hash(zn); | |
34dc7c2f BB |
251 | return (zn); |
252 | } | |
253 | ||
254 | static void | |
255 | mzap_byteswap(mzap_phys_t *buf, size_t size) | |
256 | { | |
257 | int i, max; | |
258 | buf->mz_block_type = BSWAP_64(buf->mz_block_type); | |
259 | buf->mz_salt = BSWAP_64(buf->mz_salt); | |
260 | buf->mz_normflags = BSWAP_64(buf->mz_normflags); | |
261 | max = (size / MZAP_ENT_LEN) - 1; | |
262 | for (i = 0; i < max; i++) { | |
263 | buf->mz_chunk[i].mze_value = | |
264 | BSWAP_64(buf->mz_chunk[i].mze_value); | |
265 | buf->mz_chunk[i].mze_cd = | |
266 | BSWAP_32(buf->mz_chunk[i].mze_cd); | |
267 | } | |
268 | } | |
269 | ||
270 | void | |
271 | zap_byteswap(void *buf, size_t size) | |
272 | { | |
273 | uint64_t block_type; | |
274 | ||
275 | block_type = *(uint64_t *)buf; | |
276 | ||
277 | if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { | |
278 | /* ASSERT(magic == ZAP_LEAF_MAGIC); */ | |
279 | mzap_byteswap(buf, size); | |
280 | } else { | |
281 | fzap_byteswap(buf, size); | |
282 | } | |
283 | } | |
284 | ||
285 | static int | |
286 | mze_compare(const void *arg1, const void *arg2) | |
287 | { | |
288 | const mzap_ent_t *mze1 = arg1; | |
289 | const mzap_ent_t *mze2 = arg2; | |
290 | ||
ee36c709 GN |
291 | int cmp = AVL_CMP(mze1->mze_hash, mze2->mze_hash); |
292 | if (likely(cmp)) | |
293 | return (cmp); | |
294 | ||
295 | return (AVL_CMP(mze1->mze_cd, mze2->mze_cd)); | |
34dc7c2f BB |
296 | } |
297 | ||
298 | static void | |
428870ff | 299 | mze_insert(zap_t *zap, int chunkid, uint64_t hash) |
34dc7c2f BB |
300 | { |
301 | mzap_ent_t *mze; | |
302 | ||
303 | ASSERT(zap->zap_ismicro); | |
304 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
34dc7c2f | 305 | |
79c76d5b | 306 | mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); |
34dc7c2f BB |
307 | mze->mze_chunkid = chunkid; |
308 | mze->mze_hash = hash; | |
428870ff BB |
309 | mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; |
310 | ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); | |
34dc7c2f BB |
311 | avl_add(&zap->zap_m.zap_avl, mze); |
312 | } | |
313 | ||
314 | static mzap_ent_t * | |
315 | mze_find(zap_name_t *zn) | |
316 | { | |
317 | mzap_ent_t mze_tofind; | |
318 | mzap_ent_t *mze; | |
319 | avl_index_t idx; | |
320 | avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; | |
321 | ||
322 | ASSERT(zn->zn_zap->zap_ismicro); | |
323 | ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); | |
324 | ||
34dc7c2f | 325 | mze_tofind.mze_hash = zn->zn_hash; |
428870ff | 326 | mze_tofind.mze_cd = 0; |
34dc7c2f | 327 | |
34dc7c2f BB |
328 | mze = avl_find(avl, &mze_tofind, &idx); |
329 | if (mze == NULL) | |
330 | mze = avl_nearest(avl, idx, AVL_AFTER); | |
331 | for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { | |
428870ff BB |
332 | ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); |
333 | if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) | |
34dc7c2f BB |
334 | return (mze); |
335 | } | |
9b7b9cd3 | 336 | |
34dc7c2f BB |
337 | return (NULL); |
338 | } | |
339 | ||
340 | static uint32_t | |
341 | mze_find_unused_cd(zap_t *zap, uint64_t hash) | |
342 | { | |
343 | mzap_ent_t mze_tofind; | |
344 | mzap_ent_t *mze; | |
345 | avl_index_t idx; | |
346 | avl_tree_t *avl = &zap->zap_m.zap_avl; | |
347 | uint32_t cd; | |
348 | ||
349 | ASSERT(zap->zap_ismicro); | |
350 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
351 | ||
352 | mze_tofind.mze_hash = hash; | |
428870ff | 353 | mze_tofind.mze_cd = 0; |
34dc7c2f BB |
354 | |
355 | cd = 0; | |
356 | for (mze = avl_find(avl, &mze_tofind, &idx); | |
357 | mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { | |
428870ff | 358 | if (mze->mze_cd != cd) |
34dc7c2f BB |
359 | break; |
360 | cd++; | |
361 | } | |
362 | ||
363 | return (cd); | |
364 | } | |
365 | ||
599b8648 CC |
366 | /* |
367 | * Each mzap entry requires at max : 4 chunks | |
368 | * 3 chunks for names + 1 chunk for value. | |
369 | */ | |
370 | #define MZAP_ENT_CHUNKS (1 + ZAP_LEAF_ARRAY_NCHUNKS(MZAP_NAME_LEN) + \ | |
371 | ZAP_LEAF_ARRAY_NCHUNKS(sizeof (uint64_t))) | |
372 | ||
373 | /* | |
374 | * Check if the current entry keeps the colliding entries under the fatzap leaf | |
375 | * size. | |
376 | */ | |
377 | static boolean_t | |
378 | mze_canfit_fzap_leaf(zap_name_t *zn, uint64_t hash) | |
379 | { | |
380 | zap_t *zap = zn->zn_zap; | |
381 | mzap_ent_t mze_tofind; | |
382 | mzap_ent_t *mze; | |
383 | avl_index_t idx; | |
384 | avl_tree_t *avl = &zap->zap_m.zap_avl; | |
385 | uint32_t mzap_ents = 0; | |
386 | ||
387 | mze_tofind.mze_hash = hash; | |
388 | mze_tofind.mze_cd = 0; | |
389 | ||
390 | for (mze = avl_find(avl, &mze_tofind, &idx); | |
391 | mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { | |
392 | mzap_ents++; | |
393 | } | |
394 | ||
395 | /* Include the new entry being added */ | |
396 | mzap_ents++; | |
397 | ||
398 | return (ZAP_LEAF_NUMCHUNKS_DEF > (mzap_ents * MZAP_ENT_CHUNKS)); | |
399 | } | |
400 | ||
34dc7c2f BB |
401 | static void |
402 | mze_remove(zap_t *zap, mzap_ent_t *mze) | |
403 | { | |
404 | ASSERT(zap->zap_ismicro); | |
405 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
406 | ||
407 | avl_remove(&zap->zap_m.zap_avl, mze); | |
408 | kmem_free(mze, sizeof (mzap_ent_t)); | |
409 | } | |
410 | ||
411 | static void | |
412 | mze_destroy(zap_t *zap) | |
413 | { | |
414 | mzap_ent_t *mze; | |
415 | void *avlcookie = NULL; | |
416 | ||
c65aa5b2 | 417 | while ((mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie))) |
34dc7c2f BB |
418 | kmem_free(mze, sizeof (mzap_ent_t)); |
419 | avl_destroy(&zap->zap_m.zap_avl); | |
420 | } | |
421 | ||
422 | static zap_t * | |
423 | mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) | |
424 | { | |
425 | zap_t *winner; | |
426 | zap_t *zap; | |
427 | int i; | |
32c8c946 CC |
428 | uint64_t *zap_hdr = (uint64_t *)db->db_data; |
429 | uint64_t zap_block_type = zap_hdr[0]; | |
430 | uint64_t zap_magic = zap_hdr[1]; | |
34dc7c2f BB |
431 | |
432 | ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); | |
433 | ||
79c76d5b | 434 | zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); |
ef5319df | 435 | rw_init(&zap->zap_rwlock, NULL, RW_DEFAULT, NULL); |
34dc7c2f BB |
436 | rw_enter(&zap->zap_rwlock, RW_WRITER); |
437 | zap->zap_objset = os; | |
438 | zap->zap_object = obj; | |
439 | zap->zap_dbuf = db; | |
440 | ||
32c8c946 | 441 | if (zap_block_type != ZBT_MICRO) { |
c17486b2 GN |
442 | mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, MUTEX_DEFAULT, |
443 | 0); | |
9bd274dd | 444 | zap->zap_f.zap_block_shift = highbit64(db->db_size) - 1; |
32c8c946 CC |
445 | if (zap_block_type != ZBT_HEADER || zap_magic != ZAP_MAGIC) { |
446 | winner = NULL; /* No actual winner here... */ | |
447 | goto handle_winner; | |
448 | } | |
34dc7c2f BB |
449 | } else { |
450 | zap->zap_ismicro = TRUE; | |
451 | } | |
452 | ||
453 | /* | |
454 | * Make sure that zap_ismicro is set before we let others see | |
455 | * it, because zap_lockdir() checks zap_ismicro without the lock | |
456 | * held. | |
457 | */ | |
39efbde7 | 458 | dmu_buf_init_user(&zap->zap_dbu, zap_evict_sync, NULL, &zap->zap_dbuf); |
0c66c32d | 459 | winner = dmu_buf_set_user(db, &zap->zap_dbu); |
34dc7c2f | 460 | |
32c8c946 CC |
461 | if (winner != NULL) |
462 | goto handle_winner; | |
34dc7c2f BB |
463 | |
464 | if (zap->zap_ismicro) { | |
d683ddbb JG |
465 | zap->zap_salt = zap_m_phys(zap)->mz_salt; |
466 | zap->zap_normflags = zap_m_phys(zap)->mz_normflags; | |
34dc7c2f BB |
467 | zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; |
468 | avl_create(&zap->zap_m.zap_avl, mze_compare, | |
469 | sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); | |
470 | ||
471 | for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { | |
472 | mzap_ent_phys_t *mze = | |
d683ddbb | 473 | &zap_m_phys(zap)->mz_chunk[i]; |
34dc7c2f BB |
474 | if (mze->mze_name[0]) { |
475 | zap_name_t *zn; | |
476 | ||
477 | zap->zap_m.zap_num_entries++; | |
9b7b9cd3 | 478 | zn = zap_name_alloc(zap, mze->mze_name, 0); |
428870ff | 479 | mze_insert(zap, i, zn->zn_hash); |
34dc7c2f BB |
480 | zap_name_free(zn); |
481 | } | |
482 | } | |
483 | } else { | |
d683ddbb JG |
484 | zap->zap_salt = zap_f_phys(zap)->zap_salt; |
485 | zap->zap_normflags = zap_f_phys(zap)->zap_normflags; | |
34dc7c2f BB |
486 | |
487 | ASSERT3U(sizeof (struct zap_leaf_header), ==, | |
488 | 2*ZAP_LEAF_CHUNKSIZE); | |
489 | ||
490 | /* | |
491 | * The embedded pointer table should not overlap the | |
492 | * other members. | |
493 | */ | |
494 | ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, | |
d683ddbb | 495 | &zap_f_phys(zap)->zap_salt); |
34dc7c2f BB |
496 | |
497 | /* | |
498 | * The embedded pointer table should end at the end of | |
499 | * the block | |
500 | */ | |
501 | ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, | |
502 | 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - | |
d683ddbb | 503 | (uintptr_t)zap_f_phys(zap), ==, |
34dc7c2f BB |
504 | zap->zap_dbuf->db_size); |
505 | } | |
506 | rw_exit(&zap->zap_rwlock); | |
507 | return (zap); | |
32c8c946 CC |
508 | |
509 | handle_winner: | |
510 | rw_exit(&zap->zap_rwlock); | |
511 | rw_destroy(&zap->zap_rwlock); | |
512 | if (!zap->zap_ismicro) | |
513 | mutex_destroy(&zap->zap_f.zap_num_entries_mtx); | |
514 | kmem_free(zap, sizeof (zap_t)); | |
515 | return (winner); | |
34dc7c2f BB |
516 | } |
517 | ||
8bea9815 MA |
518 | static int |
519 | zap_lockdir_impl(dmu_buf_t *db, void *tag, dmu_tx_t *tx, | |
34dc7c2f BB |
520 | krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) |
521 | { | |
ceb49b0a | 522 | dmu_object_info_t doi; |
34dc7c2f | 523 | zap_t *zap; |
34dc7c2f | 524 | krw_t lt; |
34dc7c2f | 525 | |
8bea9815 MA |
526 | objset_t *os = dmu_buf_get_objset(db); |
527 | uint64_t obj = db->db_object; | |
34dc7c2f | 528 | |
8bea9815 MA |
529 | ASSERT0(db->db_offset); |
530 | *zapp = NULL; | |
34dc7c2f | 531 | |
ceb49b0a BB |
532 | dmu_object_info_from_db(db, &doi); |
533 | if (DMU_OT_BYTESWAP(doi.doi_type) != DMU_BSWAP_ZAP) | |
534 | return (SET_ERROR(EINVAL)); | |
34dc7c2f BB |
535 | |
536 | zap = dmu_buf_get_user(db); | |
32c8c946 | 537 | if (zap == NULL) { |
34dc7c2f | 538 | zap = mzap_open(os, obj, db); |
32c8c946 CC |
539 | if (zap == NULL) { |
540 | /* | |
541 | * mzap_open() didn't like what it saw on-disk. | |
542 | * Check for corruption! | |
543 | */ | |
32c8c946 CC |
544 | return (SET_ERROR(EIO)); |
545 | } | |
546 | } | |
34dc7c2f BB |
547 | |
548 | /* | |
549 | * We're checking zap_ismicro without the lock held, in order to | |
550 | * tell what type of lock we want. Once we have some sort of | |
551 | * lock, see if it really is the right type. In practice this | |
552 | * can only be different if it was upgraded from micro to fat, | |
553 | * and micro wanted WRITER but fat only needs READER. | |
554 | */ | |
555 | lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; | |
556 | rw_enter(&zap->zap_rwlock, lt); | |
557 | if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { | |
558 | /* it was upgraded, now we only need reader */ | |
559 | ASSERT(lt == RW_WRITER); | |
560 | ASSERT(RW_READER == | |
6d79eabf | 561 | ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)); |
34dc7c2f BB |
562 | rw_downgrade(&zap->zap_rwlock); |
563 | lt = RW_READER; | |
564 | } | |
565 | ||
566 | zap->zap_objset = os; | |
567 | ||
568 | if (lt == RW_WRITER) | |
569 | dmu_buf_will_dirty(db, tx); | |
570 | ||
571 | ASSERT3P(zap->zap_dbuf, ==, db); | |
572 | ||
573 | ASSERT(!zap->zap_ismicro || | |
574 | zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); | |
575 | if (zap->zap_ismicro && tx && adding && | |
576 | zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { | |
577 | uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; | |
578 | if (newsz > MZAP_MAX_BLKSZ) { | |
579 | dprintf("upgrading obj %llu: num_entries=%u\n", | |
580 | obj, zap->zap_m.zap_num_entries); | |
581 | *zapp = zap; | |
1c27024e | 582 | int err = mzap_upgrade(zapp, tag, tx, 0); |
8bea9815 MA |
583 | if (err != 0) |
584 | rw_exit(&zap->zap_rwlock); | |
585 | return (err); | |
34dc7c2f | 586 | } |
8bea9815 | 587 | VERIFY0(dmu_object_set_blocksize(os, obj, newsz, 0, tx)); |
34dc7c2f BB |
588 | zap->zap_m.zap_num_chunks = |
589 | db->db_size / MZAP_ENT_LEN - 1; | |
590 | } | |
591 | ||
592 | *zapp = zap; | |
593 | return (0); | |
594 | } | |
595 | ||
2bce8049 MA |
596 | static int |
597 | zap_lockdir_by_dnode(dnode_t *dn, dmu_tx_t *tx, | |
598 | krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp) | |
599 | { | |
600 | dmu_buf_t *db; | |
601 | int err; | |
602 | ||
603 | err = dmu_buf_hold_by_dnode(dn, 0, tag, &db, DMU_READ_NO_PREFETCH); | |
604 | if (err != 0) { | |
605 | return (err); | |
606 | } | |
607 | err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp); | |
608 | if (err != 0) { | |
609 | dmu_buf_rele(db, tag); | |
610 | } | |
611 | return (err); | |
612 | } | |
613 | ||
8bea9815 MA |
614 | int |
615 | zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, | |
616 | krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp) | |
617 | { | |
618 | dmu_buf_t *db; | |
619 | int err; | |
620 | ||
621 | err = dmu_buf_hold(os, obj, 0, tag, &db, DMU_READ_NO_PREFETCH); | |
622 | if (err != 0) | |
623 | return (err); | |
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 | ||
34dc7c2f | 630 | void |
8bea9815 | 631 | zap_unlockdir(zap_t *zap, void *tag) |
34dc7c2f BB |
632 | { |
633 | rw_exit(&zap->zap_rwlock); | |
8bea9815 | 634 | dmu_buf_rele(zap->zap_dbuf, tag); |
34dc7c2f BB |
635 | } |
636 | ||
637 | static int | |
8bea9815 | 638 | mzap_upgrade(zap_t **zapp, void *tag, dmu_tx_t *tx, zap_flags_t flags) |
34dc7c2f BB |
639 | { |
640 | mzap_phys_t *mzp; | |
428870ff BB |
641 | int i, sz, nchunks; |
642 | int err = 0; | |
34dc7c2f BB |
643 | zap_t *zap = *zapp; |
644 | ||
645 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
646 | ||
647 | sz = zap->zap_dbuf->db_size; | |
a3fd9d9e | 648 | mzp = vmem_alloc(sz, KM_SLEEP); |
34dc7c2f BB |
649 | bcopy(zap->zap_dbuf->db_data, mzp, sz); |
650 | nchunks = zap->zap_m.zap_num_chunks; | |
651 | ||
428870ff BB |
652 | if (!flags) { |
653 | err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, | |
654 | 1ULL << fzap_default_block_shift, 0, tx); | |
655 | if (err) { | |
a3fd9d9e | 656 | vmem_free(mzp, sz); |
428870ff BB |
657 | return (err); |
658 | } | |
34dc7c2f BB |
659 | } |
660 | ||
661 | dprintf("upgrading obj=%llu with %u chunks\n", | |
662 | zap->zap_object, nchunks); | |
663 | /* XXX destroy the avl later, so we can use the stored hash value */ | |
664 | mze_destroy(zap); | |
665 | ||
428870ff | 666 | fzap_upgrade(zap, tx, flags); |
34dc7c2f BB |
667 | |
668 | for (i = 0; i < nchunks; i++) { | |
34dc7c2f BB |
669 | mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; |
670 | zap_name_t *zn; | |
671 | if (mze->mze_name[0] == 0) | |
672 | continue; | |
673 | dprintf("adding %s=%llu\n", | |
674 | mze->mze_name, mze->mze_value); | |
9b7b9cd3 | 675 | zn = zap_name_alloc(zap, mze->mze_name, 0); |
599b8648 CC |
676 | /* If we fail here, we would end up losing entries */ |
677 | VERIFY0(fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, | |
678 | tag, tx)); | |
34dc7c2f BB |
679 | zap = zn->zn_zap; /* fzap_add_cd() may change zap */ |
680 | zap_name_free(zn); | |
34dc7c2f | 681 | } |
a3fd9d9e | 682 | vmem_free(mzp, sz); |
34dc7c2f | 683 | *zapp = zap; |
599b8648 | 684 | return (0); |
34dc7c2f BB |
685 | } |
686 | ||
9b7b9cd3 GM |
687 | /* |
688 | * The "normflags" determine the behavior of the matchtype_t which is | |
689 | * passed to zap_lookup_norm(). Names which have the same normalized | |
690 | * version will be stored with the same hash value, and therefore we can | |
691 | * perform normalization-insensitive lookups. We can be Unicode form- | |
692 | * insensitive and/or case-insensitive. The following flags are valid for | |
693 | * "normflags": | |
694 | * | |
695 | * U8_TEXTPREP_NFC | |
696 | * U8_TEXTPREP_NFD | |
697 | * U8_TEXTPREP_NFKC | |
698 | * U8_TEXTPREP_NFKD | |
699 | * U8_TEXTPREP_TOUPPER | |
700 | * | |
701 | * The *_NF* (Normalization Form) flags are mutually exclusive; at most one | |
702 | * of them may be supplied. | |
703 | */ | |
fa86b5db | 704 | void |
428870ff BB |
705 | mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, |
706 | dmu_tx_t *tx) | |
34dc7c2f BB |
707 | { |
708 | dmu_buf_t *db; | |
709 | mzap_phys_t *zp; | |
710 | ||
9631681b | 711 | VERIFY0(dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); |
34dc7c2f BB |
712 | |
713 | #ifdef ZFS_DEBUG | |
714 | { | |
715 | dmu_object_info_t doi; | |
716 | dmu_object_info_from_db(db, &doi); | |
9ae529ec | 717 | ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP); |
34dc7c2f BB |
718 | } |
719 | #endif | |
720 | ||
721 | dmu_buf_will_dirty(db, tx); | |
722 | zp = db->db_data; | |
723 | zp->mz_block_type = ZBT_MICRO; | |
724 | zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; | |
725 | zp->mz_normflags = normflags; | |
726 | dmu_buf_rele(db, FTAG); | |
428870ff BB |
727 | |
728 | if (flags != 0) { | |
729 | zap_t *zap; | |
730 | /* Only fat zap supports flags; upgrade immediately. */ | |
731 | VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, | |
8bea9815 MA |
732 | B_FALSE, B_FALSE, FTAG, &zap)); |
733 | VERIFY3U(0, ==, mzap_upgrade(&zap, FTAG, tx, flags)); | |
734 | zap_unlockdir(zap, FTAG); | |
428870ff | 735 | } |
34dc7c2f BB |
736 | } |
737 | ||
738 | int | |
739 | zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, | |
740 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
741 | { | |
50c957f7 NB |
742 | return (zap_create_claim_dnsize(os, obj, ot, bonustype, bonuslen, |
743 | 0, tx)); | |
744 | } | |
745 | ||
746 | int | |
747 | zap_create_claim_dnsize(objset_t *os, uint64_t obj, dmu_object_type_t ot, | |
748 | dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx) | |
749 | { | |
750 | return (zap_create_claim_norm_dnsize(os, obj, | |
751 | 0, ot, bonustype, bonuslen, dnodesize, tx)); | |
34dc7c2f BB |
752 | } |
753 | ||
754 | int | |
755 | zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, | |
756 | dmu_object_type_t ot, | |
757 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
50c957f7 NB |
758 | { |
759 | return (zap_create_claim_norm_dnsize(os, obj, normflags, ot, bonustype, | |
760 | bonuslen, 0, tx)); | |
761 | } | |
762 | ||
763 | int | |
764 | zap_create_claim_norm_dnsize(objset_t *os, uint64_t obj, int normflags, | |
765 | dmu_object_type_t ot, dmu_object_type_t bonustype, int bonuslen, | |
766 | int dnodesize, dmu_tx_t *tx) | |
34dc7c2f BB |
767 | { |
768 | int err; | |
769 | ||
50c957f7 NB |
770 | err = dmu_object_claim_dnsize(os, obj, ot, 0, bonustype, bonuslen, |
771 | dnodesize, tx); | |
34dc7c2f BB |
772 | if (err != 0) |
773 | return (err); | |
428870ff | 774 | mzap_create_impl(os, obj, normflags, 0, tx); |
34dc7c2f BB |
775 | return (0); |
776 | } | |
777 | ||
778 | uint64_t | |
779 | zap_create(objset_t *os, dmu_object_type_t ot, | |
780 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
781 | { | |
782 | return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); | |
783 | } | |
784 | ||
50c957f7 NB |
785 | uint64_t |
786 | zap_create_dnsize(objset_t *os, dmu_object_type_t ot, | |
787 | dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx) | |
788 | { | |
789 | return (zap_create_norm_dnsize(os, 0, ot, bonustype, bonuslen, | |
790 | dnodesize, tx)); | |
791 | } | |
792 | ||
34dc7c2f BB |
793 | uint64_t |
794 | zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, | |
795 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
796 | { | |
50c957f7 NB |
797 | return (zap_create_norm_dnsize(os, normflags, ot, bonustype, bonuslen, |
798 | 0, tx)); | |
799 | } | |
800 | ||
801 | uint64_t | |
802 | zap_create_norm_dnsize(objset_t *os, int normflags, dmu_object_type_t ot, | |
803 | dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx) | |
804 | { | |
805 | uint64_t obj = dmu_object_alloc_dnsize(os, ot, 0, bonustype, bonuslen, | |
806 | dnodesize, tx); | |
34dc7c2f | 807 | |
428870ff BB |
808 | mzap_create_impl(os, obj, normflags, 0, tx); |
809 | return (obj); | |
810 | } | |
811 | ||
812 | uint64_t | |
813 | zap_create_flags(objset_t *os, int normflags, zap_flags_t flags, | |
814 | dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, | |
815 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
816 | { | |
50c957f7 NB |
817 | return (zap_create_flags_dnsize(os, normflags, flags, ot, |
818 | leaf_blockshift, indirect_blockshift, bonustype, bonuslen, 0, tx)); | |
819 | } | |
820 | ||
821 | uint64_t | |
822 | zap_create_flags_dnsize(objset_t *os, int normflags, zap_flags_t flags, | |
823 | dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, | |
824 | dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx) | |
825 | { | |
826 | uint64_t obj = dmu_object_alloc_dnsize(os, ot, 0, bonustype, bonuslen, | |
827 | dnodesize, tx); | |
428870ff BB |
828 | |
829 | ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && | |
f1512ee6 | 830 | leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT && |
428870ff | 831 | indirect_blockshift >= SPA_MINBLOCKSHIFT && |
f1512ee6 | 832 | indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT); |
428870ff BB |
833 | |
834 | VERIFY(dmu_object_set_blocksize(os, obj, | |
835 | 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); | |
836 | ||
837 | mzap_create_impl(os, obj, normflags, flags, tx); | |
34dc7c2f BB |
838 | return (obj); |
839 | } | |
840 | ||
841 | int | |
842 | zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) | |
843 | { | |
844 | /* | |
845 | * dmu_object_free will free the object number and free the | |
846 | * data. Freeing the data will cause our pageout function to be | |
847 | * called, which will destroy our data (zap_leaf_t's and zap_t). | |
848 | */ | |
849 | ||
850 | return (dmu_object_free(os, zapobj, tx)); | |
851 | } | |
852 | ||
34dc7c2f | 853 | void |
39efbde7 | 854 | zap_evict_sync(void *dbu) |
34dc7c2f | 855 | { |
0c66c32d | 856 | zap_t *zap = dbu; |
34dc7c2f BB |
857 | |
858 | rw_destroy(&zap->zap_rwlock); | |
859 | ||
860 | if (zap->zap_ismicro) | |
861 | mze_destroy(zap); | |
862 | else | |
863 | mutex_destroy(&zap->zap_f.zap_num_entries_mtx); | |
864 | ||
865 | kmem_free(zap, sizeof (zap_t)); | |
866 | } | |
867 | ||
868 | int | |
869 | zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) | |
870 | { | |
871 | zap_t *zap; | |
872 | int err; | |
873 | ||
8bea9815 | 874 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); |
34dc7c2f BB |
875 | if (err) |
876 | return (err); | |
877 | if (!zap->zap_ismicro) { | |
878 | err = fzap_count(zap, count); | |
879 | } else { | |
880 | *count = zap->zap_m.zap_num_entries; | |
881 | } | |
8bea9815 | 882 | zap_unlockdir(zap, FTAG); |
34dc7c2f BB |
883 | return (err); |
884 | } | |
885 | ||
886 | /* | |
887 | * zn may be NULL; if not specified, it will be computed if needed. | |
888 | * See also the comment above zap_entry_normalization_conflict(). | |
889 | */ | |
890 | static boolean_t | |
891 | mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) | |
892 | { | |
893 | mzap_ent_t *other; | |
894 | int direction = AVL_BEFORE; | |
895 | boolean_t allocdzn = B_FALSE; | |
896 | ||
897 | if (zap->zap_normflags == 0) | |
898 | return (B_FALSE); | |
899 | ||
900 | again: | |
901 | for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); | |
902 | other && other->mze_hash == mze->mze_hash; | |
903 | other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { | |
904 | ||
905 | if (zn == NULL) { | |
428870ff | 906 | zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, |
9b7b9cd3 | 907 | MT_NORMALIZE); |
34dc7c2f BB |
908 | allocdzn = B_TRUE; |
909 | } | |
428870ff | 910 | if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { |
34dc7c2f BB |
911 | if (allocdzn) |
912 | zap_name_free(zn); | |
913 | return (B_TRUE); | |
914 | } | |
915 | } | |
916 | ||
917 | if (direction == AVL_BEFORE) { | |
918 | direction = AVL_AFTER; | |
919 | goto again; | |
920 | } | |
921 | ||
922 | if (allocdzn) | |
923 | zap_name_free(zn); | |
924 | return (B_FALSE); | |
925 | } | |
926 | ||
927 | /* | |
928 | * Routines for manipulating attributes. | |
929 | */ | |
930 | ||
931 | int | |
932 | zap_lookup(objset_t *os, uint64_t zapobj, const char *name, | |
933 | uint64_t integer_size, uint64_t num_integers, void *buf) | |
934 | { | |
935 | return (zap_lookup_norm(os, zapobj, name, integer_size, | |
9b7b9cd3 | 936 | num_integers, buf, 0, NULL, 0, NULL)); |
34dc7c2f BB |
937 | } |
938 | ||
8bea9815 MA |
939 | static int |
940 | zap_lookup_impl(zap_t *zap, const char *name, | |
34dc7c2f BB |
941 | uint64_t integer_size, uint64_t num_integers, void *buf, |
942 | matchtype_t mt, char *realname, int rn_len, | |
943 | boolean_t *ncp) | |
944 | { | |
8bea9815 | 945 | int err = 0; |
34dc7c2f BB |
946 | mzap_ent_t *mze; |
947 | zap_name_t *zn; | |
948 | ||
34dc7c2f | 949 | zn = zap_name_alloc(zap, name, mt); |
8bea9815 | 950 | if (zn == NULL) |
2e528b49 | 951 | return (SET_ERROR(ENOTSUP)); |
34dc7c2f BB |
952 | |
953 | if (!zap->zap_ismicro) { | |
954 | err = fzap_lookup(zn, integer_size, num_integers, buf, | |
955 | realname, rn_len, ncp); | |
956 | } else { | |
957 | mze = mze_find(zn); | |
958 | if (mze == NULL) { | |
2e528b49 | 959 | err = SET_ERROR(ENOENT); |
34dc7c2f BB |
960 | } else { |
961 | if (num_integers < 1) { | |
2e528b49 | 962 | err = SET_ERROR(EOVERFLOW); |
34dc7c2f | 963 | } else if (integer_size != 8) { |
2e528b49 | 964 | err = SET_ERROR(EINVAL); |
34dc7c2f | 965 | } else { |
428870ff BB |
966 | *(uint64_t *)buf = |
967 | MZE_PHYS(zap, mze)->mze_value; | |
34dc7c2f | 968 | (void) strlcpy(realname, |
428870ff | 969 | MZE_PHYS(zap, mze)->mze_name, rn_len); |
34dc7c2f BB |
970 | if (ncp) { |
971 | *ncp = mzap_normalization_conflict(zap, | |
972 | zn, mze); | |
973 | } | |
974 | } | |
975 | } | |
976 | } | |
977 | zap_name_free(zn); | |
8bea9815 MA |
978 | return (err); |
979 | } | |
980 | ||
981 | int | |
982 | zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, | |
983 | uint64_t integer_size, uint64_t num_integers, void *buf, | |
984 | matchtype_t mt, char *realname, int rn_len, | |
985 | boolean_t *ncp) | |
986 | { | |
987 | zap_t *zap; | |
988 | int err; | |
989 | ||
990 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); | |
991 | if (err != 0) | |
992 | return (err); | |
993 | err = zap_lookup_impl(zap, name, integer_size, | |
994 | num_integers, buf, mt, realname, rn_len, ncp); | |
995 | zap_unlockdir(zap, FTAG); | |
34dc7c2f BB |
996 | return (err); |
997 | } | |
998 | ||
07248450 BB |
999 | int |
1000 | zap_prefetch(objset_t *os, uint64_t zapobj, const char *name) | |
1001 | { | |
1002 | zap_t *zap; | |
1003 | int err; | |
1004 | zap_name_t *zn; | |
1005 | ||
8bea9815 | 1006 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); |
07248450 BB |
1007 | if (err) |
1008 | return (err); | |
9b7b9cd3 | 1009 | zn = zap_name_alloc(zap, name, 0); |
07248450 | 1010 | if (zn == NULL) { |
8bea9815 | 1011 | zap_unlockdir(zap, FTAG); |
07248450 BB |
1012 | return (SET_ERROR(ENOTSUP)); |
1013 | } | |
1014 | ||
1015 | fzap_prefetch(zn); | |
1016 | zap_name_free(zn); | |
8bea9815 | 1017 | zap_unlockdir(zap, FTAG); |
07248450 BB |
1018 | return (err); |
1019 | } | |
1020 | ||
2bce8049 MA |
1021 | int |
1022 | zap_lookup_by_dnode(dnode_t *dn, const char *name, | |
1023 | uint64_t integer_size, uint64_t num_integers, void *buf) | |
1024 | { | |
1025 | return (zap_lookup_norm_by_dnode(dn, name, integer_size, | |
9b7b9cd3 | 1026 | num_integers, buf, 0, NULL, 0, NULL)); |
2bce8049 MA |
1027 | } |
1028 | ||
1029 | int | |
1030 | zap_lookup_norm_by_dnode(dnode_t *dn, const char *name, | |
1031 | uint64_t integer_size, uint64_t num_integers, void *buf, | |
1032 | matchtype_t mt, char *realname, int rn_len, | |
1033 | boolean_t *ncp) | |
1034 | { | |
1035 | zap_t *zap; | |
1036 | int err; | |
1037 | ||
1038 | err = zap_lockdir_by_dnode(dn, NULL, RW_READER, TRUE, FALSE, | |
1039 | FTAG, &zap); | |
1040 | if (err != 0) | |
1041 | return (err); | |
1042 | err = zap_lookup_impl(zap, name, integer_size, | |
1043 | num_integers, buf, mt, realname, rn_len, ncp); | |
1044 | zap_unlockdir(zap, FTAG); | |
1045 | return (err); | |
1046 | } | |
1047 | ||
428870ff BB |
1048 | int |
1049 | zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1050 | int key_numints) | |
1051 | { | |
1052 | zap_t *zap; | |
1053 | int err; | |
1054 | zap_name_t *zn; | |
1055 | ||
8bea9815 | 1056 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); |
428870ff BB |
1057 | if (err) |
1058 | return (err); | |
1059 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1060 | if (zn == NULL) { | |
8bea9815 | 1061 | zap_unlockdir(zap, FTAG); |
2e528b49 | 1062 | return (SET_ERROR(ENOTSUP)); |
428870ff BB |
1063 | } |
1064 | ||
1065 | fzap_prefetch(zn); | |
1066 | zap_name_free(zn); | |
8bea9815 | 1067 | zap_unlockdir(zap, FTAG); |
428870ff BB |
1068 | return (err); |
1069 | } | |
1070 | ||
1071 | int | |
1072 | zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1073 | int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) | |
1074 | { | |
1075 | zap_t *zap; | |
1076 | int err; | |
1077 | zap_name_t *zn; | |
1078 | ||
8bea9815 | 1079 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); |
428870ff BB |
1080 | if (err) |
1081 | return (err); | |
1082 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1083 | if (zn == NULL) { | |
8bea9815 | 1084 | zap_unlockdir(zap, FTAG); |
2e528b49 | 1085 | return (SET_ERROR(ENOTSUP)); |
428870ff BB |
1086 | } |
1087 | ||
1088 | err = fzap_lookup(zn, integer_size, num_integers, buf, | |
1089 | NULL, 0, NULL); | |
1090 | zap_name_free(zn); | |
8bea9815 | 1091 | zap_unlockdir(zap, FTAG); |
428870ff BB |
1092 | return (err); |
1093 | } | |
1094 | ||
1095 | int | |
1096 | zap_contains(objset_t *os, uint64_t zapobj, const char *name) | |
1097 | { | |
fa86b5db | 1098 | int err = zap_lookup_norm(os, zapobj, name, 0, |
9b7b9cd3 | 1099 | 0, NULL, 0, NULL, 0, NULL); |
428870ff BB |
1100 | if (err == EOVERFLOW || err == EINVAL) |
1101 | err = 0; /* found, but skipped reading the value */ | |
1102 | return (err); | |
1103 | } | |
1104 | ||
34dc7c2f BB |
1105 | int |
1106 | zap_length(objset_t *os, uint64_t zapobj, const char *name, | |
1107 | uint64_t *integer_size, uint64_t *num_integers) | |
1108 | { | |
1109 | zap_t *zap; | |
1110 | int err; | |
1111 | mzap_ent_t *mze; | |
1112 | zap_name_t *zn; | |
1113 | ||
8bea9815 | 1114 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); |
34dc7c2f BB |
1115 | if (err) |
1116 | return (err); | |
9b7b9cd3 | 1117 | zn = zap_name_alloc(zap, name, 0); |
34dc7c2f | 1118 | if (zn == NULL) { |
8bea9815 | 1119 | zap_unlockdir(zap, FTAG); |
2e528b49 | 1120 | return (SET_ERROR(ENOTSUP)); |
34dc7c2f BB |
1121 | } |
1122 | if (!zap->zap_ismicro) { | |
1123 | err = fzap_length(zn, integer_size, num_integers); | |
1124 | } else { | |
1125 | mze = mze_find(zn); | |
1126 | if (mze == NULL) { | |
2e528b49 | 1127 | err = SET_ERROR(ENOENT); |
34dc7c2f BB |
1128 | } else { |
1129 | if (integer_size) | |
1130 | *integer_size = 8; | |
1131 | if (num_integers) | |
1132 | *num_integers = 1; | |
1133 | } | |
1134 | } | |
1135 | zap_name_free(zn); | |
8bea9815 | 1136 | zap_unlockdir(zap, FTAG); |
34dc7c2f BB |
1137 | return (err); |
1138 | } | |
1139 | ||
428870ff BB |
1140 | int |
1141 | zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1142 | int key_numints, uint64_t *integer_size, uint64_t *num_integers) | |
1143 | { | |
1144 | zap_t *zap; | |
1145 | int err; | |
1146 | zap_name_t *zn; | |
1147 | ||
8bea9815 | 1148 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); |
428870ff BB |
1149 | if (err) |
1150 | return (err); | |
1151 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1152 | if (zn == NULL) { | |
8bea9815 | 1153 | zap_unlockdir(zap, FTAG); |
2e528b49 | 1154 | return (SET_ERROR(ENOTSUP)); |
428870ff BB |
1155 | } |
1156 | err = fzap_length(zn, integer_size, num_integers); | |
1157 | zap_name_free(zn); | |
8bea9815 | 1158 | zap_unlockdir(zap, FTAG); |
428870ff BB |
1159 | return (err); |
1160 | } | |
1161 | ||
34dc7c2f BB |
1162 | static void |
1163 | mzap_addent(zap_name_t *zn, uint64_t value) | |
1164 | { | |
1165 | int i; | |
1166 | zap_t *zap = zn->zn_zap; | |
1167 | int start = zap->zap_m.zap_alloc_next; | |
1168 | uint32_t cd; | |
1169 | ||
34dc7c2f BB |
1170 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); |
1171 | ||
1172 | #ifdef ZFS_DEBUG | |
1173 | for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { | |
d1d7e268 | 1174 | ASSERTV(mzap_ent_phys_t *mze); |
d683ddbb | 1175 | ASSERT(mze = &zap_m_phys(zap)->mz_chunk[i]); |
428870ff | 1176 | ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); |
34dc7c2f BB |
1177 | } |
1178 | #endif | |
1179 | ||
1180 | cd = mze_find_unused_cd(zap, zn->zn_hash); | |
1181 | /* given the limited size of the microzap, this can't happen */ | |
428870ff | 1182 | ASSERT(cd < zap_maxcd(zap)); |
34dc7c2f BB |
1183 | |
1184 | again: | |
1185 | for (i = start; i < zap->zap_m.zap_num_chunks; i++) { | |
d683ddbb | 1186 | mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; |
34dc7c2f BB |
1187 | if (mze->mze_name[0] == 0) { |
1188 | mze->mze_value = value; | |
1189 | mze->mze_cd = cd; | |
680eada9 | 1190 | (void) strlcpy(mze->mze_name, zn->zn_key_orig, |
1191 | sizeof (mze->mze_name)); | |
34dc7c2f BB |
1192 | zap->zap_m.zap_num_entries++; |
1193 | zap->zap_m.zap_alloc_next = i+1; | |
1194 | if (zap->zap_m.zap_alloc_next == | |
1195 | zap->zap_m.zap_num_chunks) | |
1196 | zap->zap_m.zap_alloc_next = 0; | |
428870ff | 1197 | mze_insert(zap, i, zn->zn_hash); |
34dc7c2f BB |
1198 | return; |
1199 | } | |
1200 | } | |
1201 | if (start != 0) { | |
1202 | start = 0; | |
1203 | goto again; | |
1204 | } | |
989fd514 | 1205 | cmn_err(CE_PANIC, "out of entries!"); |
34dc7c2f BB |
1206 | } |
1207 | ||
0eef1bde | 1208 | static int |
1209 | zap_add_impl(zap_t *zap, const char *key, | |
34dc7c2f | 1210 | int integer_size, uint64_t num_integers, |
0eef1bde | 1211 | const void *val, dmu_tx_t *tx, void *tag) |
34dc7c2f | 1212 | { |
0eef1bde | 1213 | int err = 0; |
34dc7c2f BB |
1214 | mzap_ent_t *mze; |
1215 | const uint64_t *intval = val; | |
1216 | zap_name_t *zn; | |
1217 | ||
9b7b9cd3 | 1218 | zn = zap_name_alloc(zap, key, 0); |
34dc7c2f | 1219 | if (zn == NULL) { |
0eef1bde | 1220 | zap_unlockdir(zap, tag); |
2e528b49 | 1221 | return (SET_ERROR(ENOTSUP)); |
34dc7c2f BB |
1222 | } |
1223 | if (!zap->zap_ismicro) { | |
0eef1bde | 1224 | err = fzap_add(zn, integer_size, num_integers, val, tag, tx); |
34dc7c2f BB |
1225 | zap = zn->zn_zap; /* fzap_add() may change zap */ |
1226 | } else if (integer_size != 8 || num_integers != 1 || | |
599b8648 CC |
1227 | strlen(key) >= MZAP_NAME_LEN || |
1228 | !mze_canfit_fzap_leaf(zn, zn->zn_hash)) { | |
0eef1bde | 1229 | err = mzap_upgrade(&zn->zn_zap, tag, tx, 0); |
8bea9815 MA |
1230 | if (err == 0) { |
1231 | err = fzap_add(zn, integer_size, num_integers, val, | |
0eef1bde | 1232 | tag, tx); |
8bea9815 | 1233 | } |
34dc7c2f BB |
1234 | zap = zn->zn_zap; /* fzap_add() may change zap */ |
1235 | } else { | |
1236 | mze = mze_find(zn); | |
1237 | if (mze != NULL) { | |
2e528b49 | 1238 | err = SET_ERROR(EEXIST); |
34dc7c2f BB |
1239 | } else { |
1240 | mzap_addent(zn, *intval); | |
1241 | } | |
1242 | } | |
1243 | ASSERT(zap == zn->zn_zap); | |
1244 | zap_name_free(zn); | |
66eead53 MA |
1245 | if (zap != NULL) /* may be NULL if fzap_add() failed */ |
1246 | zap_unlockdir(zap, tag); | |
0eef1bde | 1247 | return (err); |
1248 | } | |
1249 | ||
1250 | int | |
1251 | zap_add(objset_t *os, uint64_t zapobj, const char *key, | |
1252 | int integer_size, uint64_t num_integers, | |
1253 | const void *val, dmu_tx_t *tx) | |
1254 | { | |
1255 | zap_t *zap; | |
1256 | int err; | |
1257 | ||
1258 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); | |
1259 | if (err != 0) | |
1260 | return (err); | |
1261 | err = zap_add_impl(zap, key, integer_size, num_integers, val, tx, FTAG); | |
1262 | /* zap_add_impl() calls zap_unlockdir() */ | |
1263 | return (err); | |
1264 | } | |
1265 | ||
1266 | int | |
1267 | zap_add_by_dnode(dnode_t *dn, const char *key, | |
1268 | int integer_size, uint64_t num_integers, | |
1269 | const void *val, dmu_tx_t *tx) | |
1270 | { | |
1271 | zap_t *zap; | |
1272 | int err; | |
1273 | ||
1274 | err = zap_lockdir_by_dnode(dn, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); | |
1275 | if (err != 0) | |
1276 | return (err); | |
1277 | err = zap_add_impl(zap, key, integer_size, num_integers, val, tx, FTAG); | |
1278 | /* zap_add_impl() calls zap_unlockdir() */ | |
34dc7c2f BB |
1279 | return (err); |
1280 | } | |
1281 | ||
428870ff BB |
1282 | int |
1283 | zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1284 | int key_numints, int integer_size, uint64_t num_integers, | |
1285 | const void *val, dmu_tx_t *tx) | |
1286 | { | |
1287 | zap_t *zap; | |
1288 | int err; | |
1289 | zap_name_t *zn; | |
1290 | ||
8bea9815 | 1291 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); |
428870ff BB |
1292 | if (err) |
1293 | return (err); | |
1294 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1295 | if (zn == NULL) { | |
8bea9815 | 1296 | zap_unlockdir(zap, FTAG); |
2e528b49 | 1297 | return (SET_ERROR(ENOTSUP)); |
428870ff | 1298 | } |
8bea9815 | 1299 | err = fzap_add(zn, integer_size, num_integers, val, FTAG, tx); |
428870ff BB |
1300 | zap = zn->zn_zap; /* fzap_add() may change zap */ |
1301 | zap_name_free(zn); | |
1302 | if (zap != NULL) /* may be NULL if fzap_add() failed */ | |
8bea9815 | 1303 | zap_unlockdir(zap, FTAG); |
428870ff BB |
1304 | return (err); |
1305 | } | |
1306 | ||
34dc7c2f BB |
1307 | int |
1308 | zap_update(objset_t *os, uint64_t zapobj, const char *name, | |
1309 | int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) | |
1310 | { | |
1311 | zap_t *zap; | |
1312 | mzap_ent_t *mze; | |
1313 | const uint64_t *intval = val; | |
1314 | zap_name_t *zn; | |
1315 | int err; | |
1316 | ||
428870ff | 1317 | #ifdef ZFS_DEBUG |
1fde1e37 BB |
1318 | uint64_t oldval; |
1319 | ||
428870ff BB |
1320 | /* |
1321 | * If there is an old value, it shouldn't change across the | |
1322 | * lockdir (eg, due to bprewrite's xlation). | |
1323 | */ | |
1324 | if (integer_size == 8 && num_integers == 1) | |
1325 | (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); | |
1326 | #endif | |
1327 | ||
8bea9815 | 1328 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); |
34dc7c2f BB |
1329 | if (err) |
1330 | return (err); | |
9b7b9cd3 | 1331 | zn = zap_name_alloc(zap, name, 0); |
34dc7c2f | 1332 | if (zn == NULL) { |
8bea9815 | 1333 | zap_unlockdir(zap, FTAG); |
2e528b49 | 1334 | return (SET_ERROR(ENOTSUP)); |
34dc7c2f BB |
1335 | } |
1336 | if (!zap->zap_ismicro) { | |
8bea9815 MA |
1337 | err = fzap_update(zn, integer_size, num_integers, val, |
1338 | FTAG, tx); | |
34dc7c2f BB |
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); | |
8bea9815 MA |
1344 | err = mzap_upgrade(&zn->zn_zap, FTAG, tx, 0); |
1345 | if (err == 0) { | |
34dc7c2f | 1346 | err = fzap_update(zn, integer_size, num_integers, |
8bea9815 MA |
1347 | val, FTAG, tx); |
1348 | } | |
34dc7c2f BB |
1349 | zap = zn->zn_zap; /* fzap_update() may change zap */ |
1350 | } else { | |
1351 | mze = mze_find(zn); | |
1352 | if (mze != NULL) { | |
428870ff BB |
1353 | ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); |
1354 | MZE_PHYS(zap, mze)->mze_value = *intval; | |
34dc7c2f BB |
1355 | } else { |
1356 | mzap_addent(zn, *intval); | |
1357 | } | |
1358 | } | |
1359 | ASSERT(zap == zn->zn_zap); | |
1360 | zap_name_free(zn); | |
1361 | if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ | |
8bea9815 | 1362 | zap_unlockdir(zap, FTAG); |
34dc7c2f BB |
1363 | return (err); |
1364 | } | |
1365 | ||
428870ff BB |
1366 | int |
1367 | zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1368 | int key_numints, | |
1369 | int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) | |
1370 | { | |
1371 | zap_t *zap; | |
1372 | zap_name_t *zn; | |
1373 | int err; | |
1374 | ||
8bea9815 | 1375 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); |
428870ff BB |
1376 | if (err) |
1377 | return (err); | |
1378 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1379 | if (zn == NULL) { | |
8bea9815 | 1380 | zap_unlockdir(zap, FTAG); |
2e528b49 | 1381 | return (SET_ERROR(ENOTSUP)); |
428870ff | 1382 | } |
8bea9815 | 1383 | err = fzap_update(zn, integer_size, num_integers, val, FTAG, tx); |
428870ff BB |
1384 | zap = zn->zn_zap; /* fzap_update() may change zap */ |
1385 | zap_name_free(zn); | |
1386 | if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ | |
8bea9815 | 1387 | zap_unlockdir(zap, FTAG); |
428870ff BB |
1388 | return (err); |
1389 | } | |
1390 | ||
34dc7c2f BB |
1391 | int |
1392 | zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) | |
1393 | { | |
9b7b9cd3 | 1394 | return (zap_remove_norm(os, zapobj, name, 0, tx)); |
34dc7c2f BB |
1395 | } |
1396 | ||
0eef1bde | 1397 | static int |
1398 | zap_remove_impl(zap_t *zap, const char *name, | |
34dc7c2f BB |
1399 | matchtype_t mt, dmu_tx_t *tx) |
1400 | { | |
34dc7c2f BB |
1401 | mzap_ent_t *mze; |
1402 | zap_name_t *zn; | |
0eef1bde | 1403 | int err = 0; |
34dc7c2f | 1404 | |
34dc7c2f | 1405 | zn = zap_name_alloc(zap, name, mt); |
0eef1bde | 1406 | if (zn == NULL) |
2e528b49 | 1407 | return (SET_ERROR(ENOTSUP)); |
34dc7c2f BB |
1408 | if (!zap->zap_ismicro) { |
1409 | err = fzap_remove(zn, tx); | |
1410 | } else { | |
1411 | mze = mze_find(zn); | |
1412 | if (mze == NULL) { | |
2e528b49 | 1413 | err = SET_ERROR(ENOENT); |
34dc7c2f BB |
1414 | } else { |
1415 | zap->zap_m.zap_num_entries--; | |
d683ddbb | 1416 | bzero(&zap_m_phys(zap)->mz_chunk[mze->mze_chunkid], |
34dc7c2f BB |
1417 | sizeof (mzap_ent_phys_t)); |
1418 | mze_remove(zap, mze); | |
1419 | } | |
1420 | } | |
1421 | zap_name_free(zn); | |
0eef1bde | 1422 | return (err); |
1423 | } | |
1424 | ||
1425 | int | |
1426 | zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, | |
1427 | matchtype_t mt, dmu_tx_t *tx) | |
1428 | { | |
1429 | zap_t *zap; | |
1430 | int err; | |
1431 | ||
1432 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); | |
1433 | if (err) | |
1434 | return (err); | |
1435 | err = zap_remove_impl(zap, name, mt, tx); | |
1436 | zap_unlockdir(zap, FTAG); | |
1437 | return (err); | |
1438 | } | |
1439 | ||
1440 | int | |
1441 | zap_remove_by_dnode(dnode_t *dn, const char *name, dmu_tx_t *tx) | |
1442 | { | |
1443 | zap_t *zap; | |
1444 | int err; | |
1445 | ||
1446 | err = zap_lockdir_by_dnode(dn, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); | |
1447 | if (err) | |
1448 | return (err); | |
9b7b9cd3 | 1449 | err = zap_remove_impl(zap, name, 0, tx); |
8bea9815 | 1450 | zap_unlockdir(zap, FTAG); |
34dc7c2f BB |
1451 | return (err); |
1452 | } | |
1453 | ||
428870ff BB |
1454 | int |
1455 | zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1456 | int key_numints, dmu_tx_t *tx) | |
1457 | { | |
1458 | zap_t *zap; | |
1459 | int err; | |
1460 | zap_name_t *zn; | |
1461 | ||
8bea9815 | 1462 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); |
428870ff BB |
1463 | if (err) |
1464 | return (err); | |
1465 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1466 | if (zn == NULL) { | |
8bea9815 | 1467 | zap_unlockdir(zap, FTAG); |
2e528b49 | 1468 | return (SET_ERROR(ENOTSUP)); |
428870ff BB |
1469 | } |
1470 | err = fzap_remove(zn, tx); | |
1471 | zap_name_free(zn); | |
8bea9815 | 1472 | zap_unlockdir(zap, FTAG); |
428870ff BB |
1473 | return (err); |
1474 | } | |
1475 | ||
34dc7c2f BB |
1476 | /* |
1477 | * Routines for iterating over the attributes. | |
1478 | */ | |
1479 | ||
34dc7c2f BB |
1480 | void |
1481 | zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, | |
1482 | uint64_t serialized) | |
1483 | { | |
1484 | zc->zc_objset = os; | |
1485 | zc->zc_zap = NULL; | |
1486 | zc->zc_leaf = NULL; | |
1487 | zc->zc_zapobj = zapobj; | |
428870ff BB |
1488 | zc->zc_serialized = serialized; |
1489 | zc->zc_hash = 0; | |
1490 | zc->zc_cd = 0; | |
34dc7c2f BB |
1491 | } |
1492 | ||
1493 | void | |
1494 | zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) | |
1495 | { | |
1496 | zap_cursor_init_serialized(zc, os, zapobj, 0); | |
1497 | } | |
1498 | ||
1499 | void | |
1500 | zap_cursor_fini(zap_cursor_t *zc) | |
1501 | { | |
1502 | if (zc->zc_zap) { | |
1503 | rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); | |
8bea9815 | 1504 | zap_unlockdir(zc->zc_zap, NULL); |
34dc7c2f BB |
1505 | zc->zc_zap = NULL; |
1506 | } | |
1507 | if (zc->zc_leaf) { | |
1508 | rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); | |
1509 | zap_put_leaf(zc->zc_leaf); | |
1510 | zc->zc_leaf = NULL; | |
1511 | } | |
1512 | zc->zc_objset = NULL; | |
1513 | } | |
1514 | ||
1515 | uint64_t | |
1516 | zap_cursor_serialize(zap_cursor_t *zc) | |
1517 | { | |
1518 | if (zc->zc_hash == -1ULL) | |
1519 | return (-1ULL); | |
428870ff BB |
1520 | if (zc->zc_zap == NULL) |
1521 | return (zc->zc_serialized); | |
1522 | ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); | |
1523 | ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); | |
1524 | ||
1525 | /* | |
1526 | * We want to keep the high 32 bits of the cursor zero if we can, so | |
1527 | * that 32-bit programs can access this. So usually use a small | |
1528 | * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits | |
1529 | * of the cursor. | |
1530 | * | |
1531 | * [ collision differentiator | zap_hashbits()-bit hash value ] | |
1532 | */ | |
1533 | return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | | |
1534 | ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); | |
34dc7c2f BB |
1535 | } |
1536 | ||
1537 | int | |
1538 | zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) | |
1539 | { | |
1540 | int err; | |
1541 | avl_index_t idx; | |
1542 | mzap_ent_t mze_tofind; | |
1543 | mzap_ent_t *mze; | |
1544 | ||
1545 | if (zc->zc_hash == -1ULL) | |
2e528b49 | 1546 | return (SET_ERROR(ENOENT)); |
34dc7c2f BB |
1547 | |
1548 | if (zc->zc_zap == NULL) { | |
428870ff | 1549 | int hb; |
34dc7c2f | 1550 | err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, |
8bea9815 | 1551 | RW_READER, TRUE, FALSE, NULL, &zc->zc_zap); |
34dc7c2f BB |
1552 | if (err) |
1553 | return (err); | |
428870ff BB |
1554 | |
1555 | /* | |
1556 | * To support zap_cursor_init_serialized, advance, retrieve, | |
1557 | * we must add to the existing zc_cd, which may already | |
1558 | * be 1 due to the zap_cursor_advance. | |
1559 | */ | |
1560 | ASSERT(zc->zc_hash == 0); | |
1561 | hb = zap_hashbits(zc->zc_zap); | |
1562 | zc->zc_hash = zc->zc_serialized << (64 - hb); | |
1563 | zc->zc_cd += zc->zc_serialized >> hb; | |
1564 | if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ | |
1565 | zc->zc_cd = 0; | |
34dc7c2f BB |
1566 | } else { |
1567 | rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); | |
1568 | } | |
1569 | if (!zc->zc_zap->zap_ismicro) { | |
1570 | err = fzap_cursor_retrieve(zc->zc_zap, zc, za); | |
1571 | } else { | |
34dc7c2f | 1572 | mze_tofind.mze_hash = zc->zc_hash; |
428870ff | 1573 | mze_tofind.mze_cd = zc->zc_cd; |
34dc7c2f BB |
1574 | |
1575 | mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); | |
1576 | if (mze == NULL) { | |
1577 | mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, | |
1578 | idx, AVL_AFTER); | |
1579 | } | |
1580 | if (mze) { | |
428870ff BB |
1581 | mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); |
1582 | ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); | |
34dc7c2f BB |
1583 | za->za_normalization_conflict = |
1584 | mzap_normalization_conflict(zc->zc_zap, NULL, mze); | |
1585 | za->za_integer_length = 8; | |
1586 | za->za_num_integers = 1; | |
428870ff BB |
1587 | za->za_first_integer = mzep->mze_value; |
1588 | (void) strcpy(za->za_name, mzep->mze_name); | |
34dc7c2f | 1589 | zc->zc_hash = mze->mze_hash; |
428870ff | 1590 | zc->zc_cd = mze->mze_cd; |
34dc7c2f BB |
1591 | err = 0; |
1592 | } else { | |
1593 | zc->zc_hash = -1ULL; | |
2e528b49 | 1594 | err = SET_ERROR(ENOENT); |
34dc7c2f BB |
1595 | } |
1596 | } | |
1597 | rw_exit(&zc->zc_zap->zap_rwlock); | |
1598 | return (err); | |
1599 | } | |
1600 | ||
1601 | void | |
1602 | zap_cursor_advance(zap_cursor_t *zc) | |
1603 | { | |
1604 | if (zc->zc_hash == -1ULL) | |
1605 | return; | |
1606 | zc->zc_cd++; | |
428870ff BB |
1607 | } |
1608 | ||
34dc7c2f BB |
1609 | int |
1610 | zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) | |
1611 | { | |
1612 | int err; | |
1613 | zap_t *zap; | |
1614 | ||
8bea9815 | 1615 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); |
34dc7c2f BB |
1616 | if (err) |
1617 | return (err); | |
1618 | ||
1619 | bzero(zs, sizeof (zap_stats_t)); | |
1620 | ||
1621 | if (zap->zap_ismicro) { | |
1622 | zs->zs_blocksize = zap->zap_dbuf->db_size; | |
1623 | zs->zs_num_entries = zap->zap_m.zap_num_entries; | |
1624 | zs->zs_num_blocks = 1; | |
1625 | } else { | |
1626 | fzap_get_stats(zap, zs); | |
1627 | } | |
8bea9815 | 1628 | zap_unlockdir(zap, FTAG); |
34dc7c2f BB |
1629 | return (0); |
1630 | } | |
9babb374 | 1631 | |
c28b2279 | 1632 | #if defined(_KERNEL) && defined(HAVE_SPL) |
c28b2279 | 1633 | EXPORT_SYMBOL(zap_create); |
50c957f7 | 1634 | EXPORT_SYMBOL(zap_create_dnsize); |
dee28b07 | 1635 | EXPORT_SYMBOL(zap_create_norm); |
50c957f7 | 1636 | EXPORT_SYMBOL(zap_create_norm_dnsize); |
dee28b07 | 1637 | EXPORT_SYMBOL(zap_create_flags); |
50c957f7 | 1638 | EXPORT_SYMBOL(zap_create_flags_dnsize); |
dee28b07 BB |
1639 | EXPORT_SYMBOL(zap_create_claim); |
1640 | EXPORT_SYMBOL(zap_create_claim_norm); | |
50c957f7 | 1641 | EXPORT_SYMBOL(zap_create_claim_norm_dnsize); |
dee28b07 | 1642 | EXPORT_SYMBOL(zap_destroy); |
c28b2279 | 1643 | EXPORT_SYMBOL(zap_lookup); |
0eef1bde | 1644 | EXPORT_SYMBOL(zap_lookup_by_dnode); |
c28b2279 | 1645 | EXPORT_SYMBOL(zap_lookup_norm); |
dee28b07 BB |
1646 | EXPORT_SYMBOL(zap_lookup_uint64); |
1647 | EXPORT_SYMBOL(zap_contains); | |
07248450 | 1648 | EXPORT_SYMBOL(zap_prefetch); |
dee28b07 | 1649 | EXPORT_SYMBOL(zap_prefetch_uint64); |
dee28b07 | 1650 | EXPORT_SYMBOL(zap_add); |
0eef1bde | 1651 | EXPORT_SYMBOL(zap_add_by_dnode); |
dee28b07 | 1652 | EXPORT_SYMBOL(zap_add_uint64); |
c28b2279 | 1653 | EXPORT_SYMBOL(zap_update); |
dee28b07 BB |
1654 | EXPORT_SYMBOL(zap_update_uint64); |
1655 | EXPORT_SYMBOL(zap_length); | |
1656 | EXPORT_SYMBOL(zap_length_uint64); | |
1657 | EXPORT_SYMBOL(zap_remove); | |
0eef1bde | 1658 | EXPORT_SYMBOL(zap_remove_by_dnode); |
dee28b07 BB |
1659 | EXPORT_SYMBOL(zap_remove_norm); |
1660 | EXPORT_SYMBOL(zap_remove_uint64); | |
1661 | EXPORT_SYMBOL(zap_count); | |
1662 | EXPORT_SYMBOL(zap_value_search); | |
1663 | EXPORT_SYMBOL(zap_join); | |
1664 | EXPORT_SYMBOL(zap_join_increment); | |
1665 | EXPORT_SYMBOL(zap_add_int); | |
1666 | EXPORT_SYMBOL(zap_remove_int); | |
1667 | EXPORT_SYMBOL(zap_lookup_int); | |
1668 | EXPORT_SYMBOL(zap_increment_int); | |
1669 | EXPORT_SYMBOL(zap_add_int_key); | |
1670 | EXPORT_SYMBOL(zap_lookup_int_key); | |
1671 | EXPORT_SYMBOL(zap_increment); | |
1672 | EXPORT_SYMBOL(zap_cursor_init); | |
1673 | EXPORT_SYMBOL(zap_cursor_fini); | |
1674 | EXPORT_SYMBOL(zap_cursor_retrieve); | |
1675 | EXPORT_SYMBOL(zap_cursor_advance); | |
1676 | EXPORT_SYMBOL(zap_cursor_serialize); | |
dee28b07 BB |
1677 | EXPORT_SYMBOL(zap_cursor_init_serialized); |
1678 | EXPORT_SYMBOL(zap_get_stats); | |
c28b2279 | 1679 | #endif |