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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 | */ | |
21 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
34dc7c2f BB |
23 | */ |
24 | ||
428870ff | 25 | #include <sys/zio.h> |
34dc7c2f BB |
26 | #include <sys/spa.h> |
27 | #include <sys/dmu.h> | |
28 | #include <sys/zfs_context.h> | |
29 | #include <sys/zap.h> | |
30 | #include <sys/refcount.h> | |
31 | #include <sys/zap_impl.h> | |
32 | #include <sys/zap_leaf.h> | |
33 | #include <sys/avl.h> | |
428870ff | 34 | #include <sys/arc.h> |
34dc7c2f BB |
35 | |
36 | #ifdef _KERNEL | |
37 | #include <sys/sunddi.h> | |
38 | #endif | |
39 | ||
428870ff | 40 | static int mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags); |
34dc7c2f | 41 | |
428870ff BB |
42 | uint64_t |
43 | zap_getflags(zap_t *zap) | |
44 | { | |
45 | if (zap->zap_ismicro) | |
46 | return (0); | |
47 | return (zap->zap_u.zap_fat.zap_phys->zap_flags); | |
48 | } | |
34dc7c2f | 49 | |
428870ff BB |
50 | int |
51 | zap_hashbits(zap_t *zap) | |
34dc7c2f | 52 | { |
428870ff BB |
53 | if (zap_getflags(zap) & ZAP_FLAG_HASH64) |
54 | return (48); | |
55 | else | |
56 | return (28); | |
57 | } | |
34dc7c2f | 58 | |
428870ff BB |
59 | uint32_t |
60 | zap_maxcd(zap_t *zap) | |
61 | { | |
62 | if (zap_getflags(zap) & ZAP_FLAG_HASH64) | |
63 | return ((1<<16)-1); | |
64 | else | |
65 | return (-1U); | |
66 | } | |
34dc7c2f | 67 | |
428870ff BB |
68 | static uint64_t |
69 | zap_hash(zap_name_t *zn) | |
70 | { | |
71 | zap_t *zap = zn->zn_zap; | |
72 | uint64_t h = 0; | |
34dc7c2f | 73 | |
428870ff BB |
74 | if (zap_getflags(zap) & ZAP_FLAG_PRE_HASHED_KEY) { |
75 | ASSERT(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY); | |
76 | h = *(uint64_t *)zn->zn_key_orig; | |
77 | } else { | |
78 | h = zap->zap_salt; | |
79 | ASSERT(h != 0); | |
80 | ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); | |
81 | ||
82 | if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { | |
83 | int i; | |
84 | const uint64_t *wp = zn->zn_key_norm; | |
85 | ||
86 | ASSERT(zn->zn_key_intlen == 8); | |
87 | for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { | |
88 | int j; | |
89 | uint64_t word = *wp; | |
90 | ||
91 | for (j = 0; j < zn->zn_key_intlen; j++) { | |
92 | h = (h >> 8) ^ | |
93 | zfs_crc64_table[(h ^ word) & 0xFF]; | |
94 | word >>= NBBY; | |
95 | } | |
96 | } | |
97 | } else { | |
98 | int i, len; | |
99 | const uint8_t *cp = zn->zn_key_norm; | |
100 | ||
101 | /* | |
102 | * We previously stored the terminating null on | |
103 | * disk, but didn't hash it, so we need to | |
104 | * continue to not hash it. (The | |
105 | * zn_key_*_numints includes the terminating | |
106 | * null for non-binary keys.) | |
107 | */ | |
108 | len = zn->zn_key_norm_numints - 1; | |
109 | ||
110 | ASSERT(zn->zn_key_intlen == 1); | |
111 | for (i = 0; i < len; cp++, i++) { | |
112 | h = (h >> 8) ^ | |
113 | zfs_crc64_table[(h ^ *cp) & 0xFF]; | |
114 | } | |
115 | } | |
116 | } | |
34dc7c2f | 117 | /* |
428870ff BB |
118 | * Don't use all 64 bits, since we need some in the cookie for |
119 | * the collision differentiator. We MUST use the high bits, | |
120 | * since those are the ones that we first pay attention to when | |
34dc7c2f BB |
121 | * chosing the bucket. |
122 | */ | |
428870ff | 123 | h &= ~((1ULL << (64 - zap_hashbits(zap))) - 1); |
34dc7c2f | 124 | |
428870ff | 125 | return (h); |
34dc7c2f BB |
126 | } |
127 | ||
128 | static int | |
129 | zap_normalize(zap_t *zap, const char *name, char *namenorm) | |
130 | { | |
131 | size_t inlen, outlen; | |
132 | int err; | |
133 | ||
428870ff BB |
134 | ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); |
135 | ||
34dc7c2f BB |
136 | inlen = strlen(name) + 1; |
137 | outlen = ZAP_MAXNAMELEN; | |
138 | ||
139 | err = 0; | |
140 | (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, | |
9babb374 BB |
141 | zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL | |
142 | U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err); | |
34dc7c2f BB |
143 | |
144 | return (err); | |
145 | } | |
146 | ||
147 | boolean_t | |
148 | zap_match(zap_name_t *zn, const char *matchname) | |
149 | { | |
428870ff BB |
150 | ASSERT(!(zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY)); |
151 | ||
34dc7c2f BB |
152 | if (zn->zn_matchtype == MT_FIRST) { |
153 | char norm[ZAP_MAXNAMELEN]; | |
154 | ||
155 | if (zap_normalize(zn->zn_zap, matchname, norm) != 0) | |
156 | return (B_FALSE); | |
157 | ||
428870ff | 158 | return (strcmp(zn->zn_key_norm, norm) == 0); |
34dc7c2f BB |
159 | } else { |
160 | /* MT_BEST or MT_EXACT */ | |
428870ff | 161 | return (strcmp(zn->zn_key_orig, matchname) == 0); |
34dc7c2f BB |
162 | } |
163 | } | |
164 | ||
165 | void | |
166 | zap_name_free(zap_name_t *zn) | |
167 | { | |
168 | kmem_free(zn, sizeof (zap_name_t)); | |
169 | } | |
170 | ||
34dc7c2f | 171 | zap_name_t * |
428870ff | 172 | zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt) |
34dc7c2f BB |
173 | { |
174 | zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); | |
175 | ||
176 | zn->zn_zap = zap; | |
428870ff BB |
177 | zn->zn_key_intlen = sizeof (*key); |
178 | zn->zn_key_orig = key; | |
179 | zn->zn_key_orig_numints = strlen(zn->zn_key_orig) + 1; | |
34dc7c2f BB |
180 | zn->zn_matchtype = mt; |
181 | if (zap->zap_normflags) { | |
428870ff | 182 | if (zap_normalize(zap, key, zn->zn_normbuf) != 0) { |
34dc7c2f BB |
183 | zap_name_free(zn); |
184 | return (NULL); | |
185 | } | |
428870ff BB |
186 | zn->zn_key_norm = zn->zn_normbuf; |
187 | zn->zn_key_norm_numints = strlen(zn->zn_key_norm) + 1; | |
34dc7c2f BB |
188 | } else { |
189 | if (mt != MT_EXACT) { | |
190 | zap_name_free(zn); | |
191 | return (NULL); | |
192 | } | |
428870ff BB |
193 | zn->zn_key_norm = zn->zn_key_orig; |
194 | zn->zn_key_norm_numints = zn->zn_key_orig_numints; | |
34dc7c2f BB |
195 | } |
196 | ||
428870ff BB |
197 | zn->zn_hash = zap_hash(zn); |
198 | return (zn); | |
199 | } | |
200 | ||
201 | zap_name_t * | |
202 | zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) | |
203 | { | |
204 | zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP); | |
205 | ||
206 | ASSERT(zap->zap_normflags == 0); | |
207 | zn->zn_zap = zap; | |
208 | zn->zn_key_intlen = sizeof (*key); | |
209 | zn->zn_key_orig = zn->zn_key_norm = key; | |
210 | zn->zn_key_orig_numints = zn->zn_key_norm_numints = numints; | |
211 | zn->zn_matchtype = MT_EXACT; | |
212 | ||
213 | zn->zn_hash = zap_hash(zn); | |
34dc7c2f BB |
214 | return (zn); |
215 | } | |
216 | ||
217 | static void | |
218 | mzap_byteswap(mzap_phys_t *buf, size_t size) | |
219 | { | |
220 | int i, max; | |
221 | buf->mz_block_type = BSWAP_64(buf->mz_block_type); | |
222 | buf->mz_salt = BSWAP_64(buf->mz_salt); | |
223 | buf->mz_normflags = BSWAP_64(buf->mz_normflags); | |
224 | max = (size / MZAP_ENT_LEN) - 1; | |
225 | for (i = 0; i < max; i++) { | |
226 | buf->mz_chunk[i].mze_value = | |
227 | BSWAP_64(buf->mz_chunk[i].mze_value); | |
228 | buf->mz_chunk[i].mze_cd = | |
229 | BSWAP_32(buf->mz_chunk[i].mze_cd); | |
230 | } | |
231 | } | |
232 | ||
233 | void | |
234 | zap_byteswap(void *buf, size_t size) | |
235 | { | |
236 | uint64_t block_type; | |
237 | ||
238 | block_type = *(uint64_t *)buf; | |
239 | ||
240 | if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { | |
241 | /* ASSERT(magic == ZAP_LEAF_MAGIC); */ | |
242 | mzap_byteswap(buf, size); | |
243 | } else { | |
244 | fzap_byteswap(buf, size); | |
245 | } | |
246 | } | |
247 | ||
248 | static int | |
249 | mze_compare(const void *arg1, const void *arg2) | |
250 | { | |
251 | const mzap_ent_t *mze1 = arg1; | |
252 | const mzap_ent_t *mze2 = arg2; | |
253 | ||
254 | if (mze1->mze_hash > mze2->mze_hash) | |
255 | return (+1); | |
256 | if (mze1->mze_hash < mze2->mze_hash) | |
257 | return (-1); | |
428870ff | 258 | if (mze1->mze_cd > mze2->mze_cd) |
34dc7c2f | 259 | return (+1); |
428870ff | 260 | if (mze1->mze_cd < mze2->mze_cd) |
34dc7c2f BB |
261 | return (-1); |
262 | return (0); | |
263 | } | |
264 | ||
265 | static void | |
428870ff | 266 | mze_insert(zap_t *zap, int chunkid, uint64_t hash) |
34dc7c2f BB |
267 | { |
268 | mzap_ent_t *mze; | |
269 | ||
270 | ASSERT(zap->zap_ismicro); | |
271 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
34dc7c2f BB |
272 | |
273 | mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); | |
274 | mze->mze_chunkid = chunkid; | |
275 | mze->mze_hash = hash; | |
428870ff BB |
276 | mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; |
277 | ASSERT(MZE_PHYS(zap, mze)->mze_name[0] != 0); | |
34dc7c2f BB |
278 | avl_add(&zap->zap_m.zap_avl, mze); |
279 | } | |
280 | ||
281 | static mzap_ent_t * | |
282 | mze_find(zap_name_t *zn) | |
283 | { | |
284 | mzap_ent_t mze_tofind; | |
285 | mzap_ent_t *mze; | |
286 | avl_index_t idx; | |
287 | avl_tree_t *avl = &zn->zn_zap->zap_m.zap_avl; | |
288 | ||
289 | ASSERT(zn->zn_zap->zap_ismicro); | |
290 | ASSERT(RW_LOCK_HELD(&zn->zn_zap->zap_rwlock)); | |
291 | ||
34dc7c2f | 292 | mze_tofind.mze_hash = zn->zn_hash; |
428870ff | 293 | mze_tofind.mze_cd = 0; |
34dc7c2f BB |
294 | |
295 | again: | |
296 | mze = avl_find(avl, &mze_tofind, &idx); | |
297 | if (mze == NULL) | |
298 | mze = avl_nearest(avl, idx, AVL_AFTER); | |
299 | for (; mze && mze->mze_hash == zn->zn_hash; mze = AVL_NEXT(avl, mze)) { | |
428870ff BB |
300 | ASSERT3U(mze->mze_cd, ==, MZE_PHYS(zn->zn_zap, mze)->mze_cd); |
301 | if (zap_match(zn, MZE_PHYS(zn->zn_zap, mze)->mze_name)) | |
34dc7c2f BB |
302 | return (mze); |
303 | } | |
304 | if (zn->zn_matchtype == MT_BEST) { | |
305 | zn->zn_matchtype = MT_FIRST; | |
306 | goto again; | |
307 | } | |
308 | return (NULL); | |
309 | } | |
310 | ||
311 | static uint32_t | |
312 | mze_find_unused_cd(zap_t *zap, uint64_t hash) | |
313 | { | |
314 | mzap_ent_t mze_tofind; | |
315 | mzap_ent_t *mze; | |
316 | avl_index_t idx; | |
317 | avl_tree_t *avl = &zap->zap_m.zap_avl; | |
318 | uint32_t cd; | |
319 | ||
320 | ASSERT(zap->zap_ismicro); | |
321 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
322 | ||
323 | mze_tofind.mze_hash = hash; | |
428870ff | 324 | mze_tofind.mze_cd = 0; |
34dc7c2f BB |
325 | |
326 | cd = 0; | |
327 | for (mze = avl_find(avl, &mze_tofind, &idx); | |
328 | mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { | |
428870ff | 329 | if (mze->mze_cd != cd) |
34dc7c2f BB |
330 | break; |
331 | cd++; | |
332 | } | |
333 | ||
334 | return (cd); | |
335 | } | |
336 | ||
337 | static void | |
338 | mze_remove(zap_t *zap, mzap_ent_t *mze) | |
339 | { | |
340 | ASSERT(zap->zap_ismicro); | |
341 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
342 | ||
343 | avl_remove(&zap->zap_m.zap_avl, mze); | |
344 | kmem_free(mze, sizeof (mzap_ent_t)); | |
345 | } | |
346 | ||
347 | static void | |
348 | mze_destroy(zap_t *zap) | |
349 | { | |
350 | mzap_ent_t *mze; | |
351 | void *avlcookie = NULL; | |
352 | ||
c65aa5b2 | 353 | while ((mze = avl_destroy_nodes(&zap->zap_m.zap_avl, &avlcookie))) |
34dc7c2f BB |
354 | kmem_free(mze, sizeof (mzap_ent_t)); |
355 | avl_destroy(&zap->zap_m.zap_avl); | |
356 | } | |
357 | ||
358 | static zap_t * | |
359 | mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) | |
360 | { | |
361 | zap_t *winner; | |
362 | zap_t *zap; | |
363 | int i; | |
364 | ||
365 | ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); | |
366 | ||
367 | zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); | |
ef5319df | 368 | rw_init(&zap->zap_rwlock, NULL, RW_DEFAULT, NULL); |
34dc7c2f BB |
369 | rw_enter(&zap->zap_rwlock, RW_WRITER); |
370 | zap->zap_objset = os; | |
371 | zap->zap_object = obj; | |
372 | zap->zap_dbuf = db; | |
373 | ||
374 | if (*(uint64_t *)db->db_data != ZBT_MICRO) { | |
375 | mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0); | |
376 | zap->zap_f.zap_block_shift = highbit(db->db_size) - 1; | |
377 | } else { | |
378 | zap->zap_ismicro = TRUE; | |
379 | } | |
380 | ||
381 | /* | |
382 | * Make sure that zap_ismicro is set before we let others see | |
383 | * it, because zap_lockdir() checks zap_ismicro without the lock | |
384 | * held. | |
385 | */ | |
386 | winner = dmu_buf_set_user(db, zap, &zap->zap_m.zap_phys, zap_evict); | |
387 | ||
388 | if (winner != NULL) { | |
389 | rw_exit(&zap->zap_rwlock); | |
390 | rw_destroy(&zap->zap_rwlock); | |
391 | if (!zap->zap_ismicro) | |
392 | mutex_destroy(&zap->zap_f.zap_num_entries_mtx); | |
393 | kmem_free(zap, sizeof (zap_t)); | |
394 | return (winner); | |
395 | } | |
396 | ||
397 | if (zap->zap_ismicro) { | |
398 | zap->zap_salt = zap->zap_m.zap_phys->mz_salt; | |
399 | zap->zap_normflags = zap->zap_m.zap_phys->mz_normflags; | |
400 | zap->zap_m.zap_num_chunks = db->db_size / MZAP_ENT_LEN - 1; | |
401 | avl_create(&zap->zap_m.zap_avl, mze_compare, | |
402 | sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); | |
403 | ||
404 | for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { | |
405 | mzap_ent_phys_t *mze = | |
406 | &zap->zap_m.zap_phys->mz_chunk[i]; | |
407 | if (mze->mze_name[0]) { | |
408 | zap_name_t *zn; | |
409 | ||
410 | zap->zap_m.zap_num_entries++; | |
411 | zn = zap_name_alloc(zap, mze->mze_name, | |
412 | MT_EXACT); | |
428870ff | 413 | mze_insert(zap, i, zn->zn_hash); |
34dc7c2f BB |
414 | zap_name_free(zn); |
415 | } | |
416 | } | |
417 | } else { | |
418 | zap->zap_salt = zap->zap_f.zap_phys->zap_salt; | |
419 | zap->zap_normflags = zap->zap_f.zap_phys->zap_normflags; | |
420 | ||
421 | ASSERT3U(sizeof (struct zap_leaf_header), ==, | |
422 | 2*ZAP_LEAF_CHUNKSIZE); | |
423 | ||
424 | /* | |
425 | * The embedded pointer table should not overlap the | |
426 | * other members. | |
427 | */ | |
428 | ASSERT3P(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), >, | |
429 | &zap->zap_f.zap_phys->zap_salt); | |
430 | ||
431 | /* | |
432 | * The embedded pointer table should end at the end of | |
433 | * the block | |
434 | */ | |
435 | ASSERT3U((uintptr_t)&ZAP_EMBEDDED_PTRTBL_ENT(zap, | |
436 | 1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)) - | |
437 | (uintptr_t)zap->zap_f.zap_phys, ==, | |
438 | zap->zap_dbuf->db_size); | |
439 | } | |
440 | rw_exit(&zap->zap_rwlock); | |
441 | return (zap); | |
442 | } | |
443 | ||
444 | int | |
445 | zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, | |
446 | krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) | |
447 | { | |
448 | zap_t *zap; | |
449 | dmu_buf_t *db; | |
450 | krw_t lt; | |
451 | int err; | |
452 | ||
453 | *zapp = NULL; | |
454 | ||
428870ff | 455 | err = dmu_buf_hold(os, obj, 0, NULL, &db, DMU_READ_NO_PREFETCH); |
34dc7c2f BB |
456 | if (err) |
457 | return (err); | |
458 | ||
459 | #ifdef ZFS_DEBUG | |
460 | { | |
461 | dmu_object_info_t doi; | |
462 | dmu_object_info_from_db(db, &doi); | |
463 | ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap); | |
464 | } | |
465 | #endif | |
466 | ||
467 | zap = dmu_buf_get_user(db); | |
468 | if (zap == NULL) | |
469 | zap = mzap_open(os, obj, db); | |
470 | ||
471 | /* | |
472 | * We're checking zap_ismicro without the lock held, in order to | |
473 | * tell what type of lock we want. Once we have some sort of | |
474 | * lock, see if it really is the right type. In practice this | |
475 | * can only be different if it was upgraded from micro to fat, | |
476 | * and micro wanted WRITER but fat only needs READER. | |
477 | */ | |
478 | lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; | |
479 | rw_enter(&zap->zap_rwlock, lt); | |
480 | if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { | |
481 | /* it was upgraded, now we only need reader */ | |
482 | ASSERT(lt == RW_WRITER); | |
483 | ASSERT(RW_READER == | |
484 | (!zap->zap_ismicro && fatreader) ? RW_READER : lti); | |
485 | rw_downgrade(&zap->zap_rwlock); | |
486 | lt = RW_READER; | |
487 | } | |
488 | ||
489 | zap->zap_objset = os; | |
490 | ||
491 | if (lt == RW_WRITER) | |
492 | dmu_buf_will_dirty(db, tx); | |
493 | ||
494 | ASSERT3P(zap->zap_dbuf, ==, db); | |
495 | ||
496 | ASSERT(!zap->zap_ismicro || | |
497 | zap->zap_m.zap_num_entries <= zap->zap_m.zap_num_chunks); | |
498 | if (zap->zap_ismicro && tx && adding && | |
499 | zap->zap_m.zap_num_entries == zap->zap_m.zap_num_chunks) { | |
500 | uint64_t newsz = db->db_size + SPA_MINBLOCKSIZE; | |
501 | if (newsz > MZAP_MAX_BLKSZ) { | |
502 | dprintf("upgrading obj %llu: num_entries=%u\n", | |
503 | obj, zap->zap_m.zap_num_entries); | |
504 | *zapp = zap; | |
428870ff | 505 | return (mzap_upgrade(zapp, tx, 0)); |
34dc7c2f BB |
506 | } |
507 | err = dmu_object_set_blocksize(os, obj, newsz, 0, tx); | |
508 | ASSERT3U(err, ==, 0); | |
509 | zap->zap_m.zap_num_chunks = | |
510 | db->db_size / MZAP_ENT_LEN - 1; | |
511 | } | |
512 | ||
513 | *zapp = zap; | |
514 | return (0); | |
515 | } | |
516 | ||
517 | void | |
518 | zap_unlockdir(zap_t *zap) | |
519 | { | |
520 | rw_exit(&zap->zap_rwlock); | |
521 | dmu_buf_rele(zap->zap_dbuf, NULL); | |
522 | } | |
523 | ||
524 | static int | |
428870ff | 525 | mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags) |
34dc7c2f BB |
526 | { |
527 | mzap_phys_t *mzp; | |
428870ff BB |
528 | int i, sz, nchunks; |
529 | int err = 0; | |
34dc7c2f BB |
530 | zap_t *zap = *zapp; |
531 | ||
532 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
533 | ||
534 | sz = zap->zap_dbuf->db_size; | |
00b46022 | 535 | mzp = vmem_alloc(sz, KM_SLEEP); |
34dc7c2f BB |
536 | bcopy(zap->zap_dbuf->db_data, mzp, sz); |
537 | nchunks = zap->zap_m.zap_num_chunks; | |
538 | ||
428870ff BB |
539 | if (!flags) { |
540 | err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, | |
541 | 1ULL << fzap_default_block_shift, 0, tx); | |
542 | if (err) { | |
00b46022 | 543 | vmem_free(mzp, sz); |
428870ff BB |
544 | return (err); |
545 | } | |
34dc7c2f BB |
546 | } |
547 | ||
548 | dprintf("upgrading obj=%llu with %u chunks\n", | |
549 | zap->zap_object, nchunks); | |
550 | /* XXX destroy the avl later, so we can use the stored hash value */ | |
551 | mze_destroy(zap); | |
552 | ||
428870ff | 553 | fzap_upgrade(zap, tx, flags); |
34dc7c2f BB |
554 | |
555 | for (i = 0; i < nchunks; i++) { | |
34dc7c2f BB |
556 | mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; |
557 | zap_name_t *zn; | |
558 | if (mze->mze_name[0] == 0) | |
559 | continue; | |
560 | dprintf("adding %s=%llu\n", | |
561 | mze->mze_name, mze->mze_value); | |
562 | zn = zap_name_alloc(zap, mze->mze_name, MT_EXACT); | |
563 | err = fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tx); | |
564 | zap = zn->zn_zap; /* fzap_add_cd() may change zap */ | |
565 | zap_name_free(zn); | |
566 | if (err) | |
567 | break; | |
568 | } | |
00b46022 | 569 | vmem_free(mzp, sz); |
34dc7c2f BB |
570 | *zapp = zap; |
571 | return (err); | |
572 | } | |
573 | ||
574 | static void | |
428870ff BB |
575 | mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, |
576 | dmu_tx_t *tx) | |
34dc7c2f BB |
577 | { |
578 | dmu_buf_t *db; | |
579 | mzap_phys_t *zp; | |
580 | ||
428870ff | 581 | VERIFY(0 == dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); |
34dc7c2f BB |
582 | |
583 | #ifdef ZFS_DEBUG | |
584 | { | |
585 | dmu_object_info_t doi; | |
586 | dmu_object_info_from_db(db, &doi); | |
587 | ASSERT(dmu_ot[doi.doi_type].ot_byteswap == zap_byteswap); | |
588 | } | |
589 | #endif | |
590 | ||
591 | dmu_buf_will_dirty(db, tx); | |
592 | zp = db->db_data; | |
593 | zp->mz_block_type = ZBT_MICRO; | |
594 | zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; | |
595 | zp->mz_normflags = normflags; | |
596 | dmu_buf_rele(db, FTAG); | |
428870ff BB |
597 | |
598 | if (flags != 0) { | |
599 | zap_t *zap; | |
600 | /* Only fat zap supports flags; upgrade immediately. */ | |
601 | VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, | |
602 | B_FALSE, B_FALSE, &zap)); | |
603 | VERIFY3U(0, ==, mzap_upgrade(&zap, tx, flags)); | |
604 | zap_unlockdir(zap); | |
605 | } | |
34dc7c2f BB |
606 | } |
607 | ||
608 | int | |
609 | zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot, | |
610 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
611 | { | |
612 | return (zap_create_claim_norm(os, obj, | |
613 | 0, ot, bonustype, bonuslen, tx)); | |
614 | } | |
615 | ||
616 | int | |
617 | zap_create_claim_norm(objset_t *os, uint64_t obj, int normflags, | |
618 | dmu_object_type_t ot, | |
619 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
620 | { | |
621 | int err; | |
622 | ||
623 | err = dmu_object_claim(os, obj, ot, 0, bonustype, bonuslen, tx); | |
624 | if (err != 0) | |
625 | return (err); | |
428870ff | 626 | mzap_create_impl(os, obj, normflags, 0, tx); |
34dc7c2f BB |
627 | return (0); |
628 | } | |
629 | ||
630 | uint64_t | |
631 | zap_create(objset_t *os, dmu_object_type_t ot, | |
632 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
633 | { | |
634 | return (zap_create_norm(os, 0, ot, bonustype, bonuslen, tx)); | |
635 | } | |
636 | ||
637 | uint64_t | |
638 | zap_create_norm(objset_t *os, int normflags, dmu_object_type_t ot, | |
639 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
640 | { | |
641 | uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); | |
642 | ||
428870ff BB |
643 | mzap_create_impl(os, obj, normflags, 0, tx); |
644 | return (obj); | |
645 | } | |
646 | ||
647 | uint64_t | |
648 | zap_create_flags(objset_t *os, int normflags, zap_flags_t flags, | |
649 | dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift, | |
650 | dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) | |
651 | { | |
652 | uint64_t obj = dmu_object_alloc(os, ot, 0, bonustype, bonuslen, tx); | |
653 | ||
654 | ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT && | |
655 | leaf_blockshift <= SPA_MAXBLOCKSHIFT && | |
656 | indirect_blockshift >= SPA_MINBLOCKSHIFT && | |
657 | indirect_blockshift <= SPA_MAXBLOCKSHIFT); | |
658 | ||
659 | VERIFY(dmu_object_set_blocksize(os, obj, | |
660 | 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0); | |
661 | ||
662 | mzap_create_impl(os, obj, normflags, flags, tx); | |
34dc7c2f BB |
663 | return (obj); |
664 | } | |
665 | ||
666 | int | |
667 | zap_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx) | |
668 | { | |
669 | /* | |
670 | * dmu_object_free will free the object number and free the | |
671 | * data. Freeing the data will cause our pageout function to be | |
672 | * called, which will destroy our data (zap_leaf_t's and zap_t). | |
673 | */ | |
674 | ||
675 | return (dmu_object_free(os, zapobj, tx)); | |
676 | } | |
677 | ||
678 | _NOTE(ARGSUSED(0)) | |
679 | void | |
680 | zap_evict(dmu_buf_t *db, void *vzap) | |
681 | { | |
682 | zap_t *zap = vzap; | |
683 | ||
684 | rw_destroy(&zap->zap_rwlock); | |
685 | ||
686 | if (zap->zap_ismicro) | |
687 | mze_destroy(zap); | |
688 | else | |
689 | mutex_destroy(&zap->zap_f.zap_num_entries_mtx); | |
690 | ||
691 | kmem_free(zap, sizeof (zap_t)); | |
692 | } | |
693 | ||
694 | int | |
695 | zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) | |
696 | { | |
697 | zap_t *zap; | |
698 | int err; | |
699 | ||
700 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); | |
701 | if (err) | |
702 | return (err); | |
703 | if (!zap->zap_ismicro) { | |
704 | err = fzap_count(zap, count); | |
705 | } else { | |
706 | *count = zap->zap_m.zap_num_entries; | |
707 | } | |
708 | zap_unlockdir(zap); | |
709 | return (err); | |
710 | } | |
711 | ||
712 | /* | |
713 | * zn may be NULL; if not specified, it will be computed if needed. | |
714 | * See also the comment above zap_entry_normalization_conflict(). | |
715 | */ | |
716 | static boolean_t | |
717 | mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) | |
718 | { | |
719 | mzap_ent_t *other; | |
720 | int direction = AVL_BEFORE; | |
721 | boolean_t allocdzn = B_FALSE; | |
722 | ||
723 | if (zap->zap_normflags == 0) | |
724 | return (B_FALSE); | |
725 | ||
726 | again: | |
727 | for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); | |
728 | other && other->mze_hash == mze->mze_hash; | |
729 | other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { | |
730 | ||
731 | if (zn == NULL) { | |
428870ff | 732 | zn = zap_name_alloc(zap, MZE_PHYS(zap, mze)->mze_name, |
34dc7c2f BB |
733 | MT_FIRST); |
734 | allocdzn = B_TRUE; | |
735 | } | |
428870ff | 736 | if (zap_match(zn, MZE_PHYS(zap, other)->mze_name)) { |
34dc7c2f BB |
737 | if (allocdzn) |
738 | zap_name_free(zn); | |
739 | return (B_TRUE); | |
740 | } | |
741 | } | |
742 | ||
743 | if (direction == AVL_BEFORE) { | |
744 | direction = AVL_AFTER; | |
745 | goto again; | |
746 | } | |
747 | ||
748 | if (allocdzn) | |
749 | zap_name_free(zn); | |
750 | return (B_FALSE); | |
751 | } | |
752 | ||
753 | /* | |
754 | * Routines for manipulating attributes. | |
755 | */ | |
756 | ||
757 | int | |
758 | zap_lookup(objset_t *os, uint64_t zapobj, const char *name, | |
759 | uint64_t integer_size, uint64_t num_integers, void *buf) | |
760 | { | |
761 | return (zap_lookup_norm(os, zapobj, name, integer_size, | |
762 | num_integers, buf, MT_EXACT, NULL, 0, NULL)); | |
763 | } | |
764 | ||
765 | int | |
766 | zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, | |
767 | uint64_t integer_size, uint64_t num_integers, void *buf, | |
768 | matchtype_t mt, char *realname, int rn_len, | |
769 | boolean_t *ncp) | |
770 | { | |
771 | zap_t *zap; | |
772 | int err; | |
773 | mzap_ent_t *mze; | |
774 | zap_name_t *zn; | |
775 | ||
776 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); | |
777 | if (err) | |
778 | return (err); | |
779 | zn = zap_name_alloc(zap, name, mt); | |
780 | if (zn == NULL) { | |
781 | zap_unlockdir(zap); | |
782 | return (ENOTSUP); | |
783 | } | |
784 | ||
785 | if (!zap->zap_ismicro) { | |
786 | err = fzap_lookup(zn, integer_size, num_integers, buf, | |
787 | realname, rn_len, ncp); | |
788 | } else { | |
789 | mze = mze_find(zn); | |
790 | if (mze == NULL) { | |
791 | err = ENOENT; | |
792 | } else { | |
793 | if (num_integers < 1) { | |
794 | err = EOVERFLOW; | |
795 | } else if (integer_size != 8) { | |
796 | err = EINVAL; | |
797 | } else { | |
428870ff BB |
798 | *(uint64_t *)buf = |
799 | MZE_PHYS(zap, mze)->mze_value; | |
34dc7c2f | 800 | (void) strlcpy(realname, |
428870ff | 801 | MZE_PHYS(zap, mze)->mze_name, rn_len); |
34dc7c2f BB |
802 | if (ncp) { |
803 | *ncp = mzap_normalization_conflict(zap, | |
804 | zn, mze); | |
805 | } | |
806 | } | |
807 | } | |
808 | } | |
809 | zap_name_free(zn); | |
810 | zap_unlockdir(zap); | |
811 | return (err); | |
812 | } | |
813 | ||
428870ff BB |
814 | int |
815 | zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
816 | int key_numints) | |
817 | { | |
818 | zap_t *zap; | |
819 | int err; | |
820 | zap_name_t *zn; | |
821 | ||
822 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); | |
823 | if (err) | |
824 | return (err); | |
825 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
826 | if (zn == NULL) { | |
827 | zap_unlockdir(zap); | |
828 | return (ENOTSUP); | |
829 | } | |
830 | ||
831 | fzap_prefetch(zn); | |
832 | zap_name_free(zn); | |
833 | zap_unlockdir(zap); | |
834 | return (err); | |
835 | } | |
836 | ||
837 | int | |
838 | zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
839 | int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) | |
840 | { | |
841 | zap_t *zap; | |
842 | int err; | |
843 | zap_name_t *zn; | |
844 | ||
845 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); | |
846 | if (err) | |
847 | return (err); | |
848 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
849 | if (zn == NULL) { | |
850 | zap_unlockdir(zap); | |
851 | return (ENOTSUP); | |
852 | } | |
853 | ||
854 | err = fzap_lookup(zn, integer_size, num_integers, buf, | |
855 | NULL, 0, NULL); | |
856 | zap_name_free(zn); | |
857 | zap_unlockdir(zap); | |
858 | return (err); | |
859 | } | |
860 | ||
861 | int | |
862 | zap_contains(objset_t *os, uint64_t zapobj, const char *name) | |
863 | { | |
864 | int err = (zap_lookup_norm(os, zapobj, name, 0, | |
865 | 0, NULL, MT_EXACT, NULL, 0, NULL)); | |
866 | if (err == EOVERFLOW || err == EINVAL) | |
867 | err = 0; /* found, but skipped reading the value */ | |
868 | return (err); | |
869 | } | |
870 | ||
34dc7c2f BB |
871 | int |
872 | zap_length(objset_t *os, uint64_t zapobj, const char *name, | |
873 | uint64_t *integer_size, uint64_t *num_integers) | |
874 | { | |
875 | zap_t *zap; | |
876 | int err; | |
877 | mzap_ent_t *mze; | |
878 | zap_name_t *zn; | |
879 | ||
880 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); | |
881 | if (err) | |
882 | return (err); | |
883 | zn = zap_name_alloc(zap, name, MT_EXACT); | |
884 | if (zn == NULL) { | |
885 | zap_unlockdir(zap); | |
886 | return (ENOTSUP); | |
887 | } | |
888 | if (!zap->zap_ismicro) { | |
889 | err = fzap_length(zn, integer_size, num_integers); | |
890 | } else { | |
891 | mze = mze_find(zn); | |
892 | if (mze == NULL) { | |
893 | err = ENOENT; | |
894 | } else { | |
895 | if (integer_size) | |
896 | *integer_size = 8; | |
897 | if (num_integers) | |
898 | *num_integers = 1; | |
899 | } | |
900 | } | |
901 | zap_name_free(zn); | |
902 | zap_unlockdir(zap); | |
903 | return (err); | |
904 | } | |
905 | ||
428870ff BB |
906 | int |
907 | zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
908 | int key_numints, uint64_t *integer_size, uint64_t *num_integers) | |
909 | { | |
910 | zap_t *zap; | |
911 | int err; | |
912 | zap_name_t *zn; | |
913 | ||
914 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); | |
915 | if (err) | |
916 | return (err); | |
917 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
918 | if (zn == NULL) { | |
919 | zap_unlockdir(zap); | |
920 | return (ENOTSUP); | |
921 | } | |
922 | err = fzap_length(zn, integer_size, num_integers); | |
923 | zap_name_free(zn); | |
924 | zap_unlockdir(zap); | |
925 | return (err); | |
926 | } | |
927 | ||
34dc7c2f BB |
928 | static void |
929 | mzap_addent(zap_name_t *zn, uint64_t value) | |
930 | { | |
931 | int i; | |
932 | zap_t *zap = zn->zn_zap; | |
933 | int start = zap->zap_m.zap_alloc_next; | |
934 | uint32_t cd; | |
935 | ||
34dc7c2f BB |
936 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); |
937 | ||
938 | #ifdef ZFS_DEBUG | |
939 | for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { | |
1fde1e37 | 940 | ASSERTV(mzap_ent_phys_t *mze=&zap->zap_m.zap_phys->mz_chunk[i]); |
428870ff | 941 | ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); |
34dc7c2f BB |
942 | } |
943 | #endif | |
944 | ||
945 | cd = mze_find_unused_cd(zap, zn->zn_hash); | |
946 | /* given the limited size of the microzap, this can't happen */ | |
428870ff | 947 | ASSERT(cd < zap_maxcd(zap)); |
34dc7c2f BB |
948 | |
949 | again: | |
950 | for (i = start; i < zap->zap_m.zap_num_chunks; i++) { | |
951 | mzap_ent_phys_t *mze = &zap->zap_m.zap_phys->mz_chunk[i]; | |
952 | if (mze->mze_name[0] == 0) { | |
953 | mze->mze_value = value; | |
954 | mze->mze_cd = cd; | |
428870ff | 955 | (void) strcpy(mze->mze_name, zn->zn_key_orig); |
34dc7c2f BB |
956 | zap->zap_m.zap_num_entries++; |
957 | zap->zap_m.zap_alloc_next = i+1; | |
958 | if (zap->zap_m.zap_alloc_next == | |
959 | zap->zap_m.zap_num_chunks) | |
960 | zap->zap_m.zap_alloc_next = 0; | |
428870ff | 961 | mze_insert(zap, i, zn->zn_hash); |
34dc7c2f BB |
962 | return; |
963 | } | |
964 | } | |
965 | if (start != 0) { | |
966 | start = 0; | |
967 | goto again; | |
968 | } | |
969 | ASSERT(!"out of entries!"); | |
970 | } | |
971 | ||
972 | int | |
428870ff | 973 | zap_add(objset_t *os, uint64_t zapobj, const char *key, |
34dc7c2f BB |
974 | int integer_size, uint64_t num_integers, |
975 | const void *val, dmu_tx_t *tx) | |
976 | { | |
977 | zap_t *zap; | |
978 | int err; | |
979 | mzap_ent_t *mze; | |
980 | const uint64_t *intval = val; | |
981 | zap_name_t *zn; | |
982 | ||
983 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); | |
984 | if (err) | |
985 | return (err); | |
428870ff | 986 | zn = zap_name_alloc(zap, key, MT_EXACT); |
34dc7c2f BB |
987 | if (zn == NULL) { |
988 | zap_unlockdir(zap); | |
989 | return (ENOTSUP); | |
990 | } | |
991 | if (!zap->zap_ismicro) { | |
992 | err = fzap_add(zn, integer_size, num_integers, val, tx); | |
993 | zap = zn->zn_zap; /* fzap_add() may change zap */ | |
994 | } else if (integer_size != 8 || num_integers != 1 || | |
428870ff BB |
995 | strlen(key) >= MZAP_NAME_LEN) { |
996 | err = mzap_upgrade(&zn->zn_zap, tx, 0); | |
34dc7c2f BB |
997 | if (err == 0) |
998 | err = fzap_add(zn, integer_size, num_integers, val, tx); | |
999 | zap = zn->zn_zap; /* fzap_add() may change zap */ | |
1000 | } else { | |
1001 | mze = mze_find(zn); | |
1002 | if (mze != NULL) { | |
1003 | err = EEXIST; | |
1004 | } else { | |
1005 | mzap_addent(zn, *intval); | |
1006 | } | |
1007 | } | |
1008 | ASSERT(zap == zn->zn_zap); | |
1009 | zap_name_free(zn); | |
1010 | if (zap != NULL) /* may be NULL if fzap_add() failed */ | |
1011 | zap_unlockdir(zap); | |
1012 | return (err); | |
1013 | } | |
1014 | ||
428870ff BB |
1015 | int |
1016 | zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1017 | int key_numints, int integer_size, uint64_t num_integers, | |
1018 | const void *val, dmu_tx_t *tx) | |
1019 | { | |
1020 | zap_t *zap; | |
1021 | int err; | |
1022 | zap_name_t *zn; | |
1023 | ||
1024 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); | |
1025 | if (err) | |
1026 | return (err); | |
1027 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1028 | if (zn == NULL) { | |
1029 | zap_unlockdir(zap); | |
1030 | return (ENOTSUP); | |
1031 | } | |
1032 | err = fzap_add(zn, integer_size, num_integers, val, tx); | |
1033 | zap = zn->zn_zap; /* fzap_add() may change zap */ | |
1034 | zap_name_free(zn); | |
1035 | if (zap != NULL) /* may be NULL if fzap_add() failed */ | |
1036 | zap_unlockdir(zap); | |
1037 | return (err); | |
1038 | } | |
1039 | ||
34dc7c2f BB |
1040 | int |
1041 | zap_update(objset_t *os, uint64_t zapobj, const char *name, | |
1042 | int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) | |
1043 | { | |
1044 | zap_t *zap; | |
1045 | mzap_ent_t *mze; | |
1046 | const uint64_t *intval = val; | |
1047 | zap_name_t *zn; | |
1048 | int err; | |
1049 | ||
428870ff | 1050 | #ifdef ZFS_DEBUG |
1fde1e37 BB |
1051 | uint64_t oldval; |
1052 | ||
428870ff BB |
1053 | /* |
1054 | * If there is an old value, it shouldn't change across the | |
1055 | * lockdir (eg, due to bprewrite's xlation). | |
1056 | */ | |
1057 | if (integer_size == 8 && num_integers == 1) | |
1058 | (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); | |
1059 | #endif | |
1060 | ||
34dc7c2f BB |
1061 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); |
1062 | if (err) | |
1063 | return (err); | |
1064 | zn = zap_name_alloc(zap, name, MT_EXACT); | |
1065 | if (zn == NULL) { | |
1066 | zap_unlockdir(zap); | |
1067 | return (ENOTSUP); | |
1068 | } | |
1069 | if (!zap->zap_ismicro) { | |
1070 | err = fzap_update(zn, integer_size, num_integers, val, tx); | |
1071 | zap = zn->zn_zap; /* fzap_update() may change zap */ | |
1072 | } else if (integer_size != 8 || num_integers != 1 || | |
1073 | strlen(name) >= MZAP_NAME_LEN) { | |
1074 | dprintf("upgrading obj %llu: intsz=%u numint=%llu name=%s\n", | |
1075 | zapobj, integer_size, num_integers, name); | |
428870ff | 1076 | err = mzap_upgrade(&zn->zn_zap, tx, 0); |
34dc7c2f BB |
1077 | if (err == 0) |
1078 | err = fzap_update(zn, integer_size, num_integers, | |
1079 | val, tx); | |
1080 | zap = zn->zn_zap; /* fzap_update() may change zap */ | |
1081 | } else { | |
1082 | mze = mze_find(zn); | |
1083 | if (mze != NULL) { | |
428870ff BB |
1084 | ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); |
1085 | MZE_PHYS(zap, mze)->mze_value = *intval; | |
34dc7c2f BB |
1086 | } else { |
1087 | mzap_addent(zn, *intval); | |
1088 | } | |
1089 | } | |
1090 | ASSERT(zap == zn->zn_zap); | |
1091 | zap_name_free(zn); | |
1092 | if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ | |
1093 | zap_unlockdir(zap); | |
1094 | return (err); | |
1095 | } | |
1096 | ||
428870ff BB |
1097 | int |
1098 | zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1099 | int key_numints, | |
1100 | int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) | |
1101 | { | |
1102 | zap_t *zap; | |
1103 | zap_name_t *zn; | |
1104 | int err; | |
1105 | ||
1106 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, &zap); | |
1107 | if (err) | |
1108 | return (err); | |
1109 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1110 | if (zn == NULL) { | |
1111 | zap_unlockdir(zap); | |
1112 | return (ENOTSUP); | |
1113 | } | |
1114 | err = fzap_update(zn, integer_size, num_integers, val, tx); | |
1115 | zap = zn->zn_zap; /* fzap_update() may change zap */ | |
1116 | zap_name_free(zn); | |
1117 | if (zap != NULL) /* may be NULL if fzap_upgrade() failed */ | |
1118 | zap_unlockdir(zap); | |
1119 | return (err); | |
1120 | } | |
1121 | ||
34dc7c2f BB |
1122 | int |
1123 | zap_remove(objset_t *os, uint64_t zapobj, const char *name, dmu_tx_t *tx) | |
1124 | { | |
1125 | return (zap_remove_norm(os, zapobj, name, MT_EXACT, tx)); | |
1126 | } | |
1127 | ||
1128 | int | |
1129 | zap_remove_norm(objset_t *os, uint64_t zapobj, const char *name, | |
1130 | matchtype_t mt, dmu_tx_t *tx) | |
1131 | { | |
1132 | zap_t *zap; | |
1133 | int err; | |
1134 | mzap_ent_t *mze; | |
1135 | zap_name_t *zn; | |
1136 | ||
1137 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); | |
1138 | if (err) | |
1139 | return (err); | |
1140 | zn = zap_name_alloc(zap, name, mt); | |
1141 | if (zn == NULL) { | |
1142 | zap_unlockdir(zap); | |
1143 | return (ENOTSUP); | |
1144 | } | |
1145 | if (!zap->zap_ismicro) { | |
1146 | err = fzap_remove(zn, tx); | |
1147 | } else { | |
1148 | mze = mze_find(zn); | |
1149 | if (mze == NULL) { | |
1150 | err = ENOENT; | |
1151 | } else { | |
1152 | zap->zap_m.zap_num_entries--; | |
1153 | bzero(&zap->zap_m.zap_phys->mz_chunk[mze->mze_chunkid], | |
1154 | sizeof (mzap_ent_phys_t)); | |
1155 | mze_remove(zap, mze); | |
1156 | } | |
1157 | } | |
1158 | zap_name_free(zn); | |
1159 | zap_unlockdir(zap); | |
1160 | return (err); | |
1161 | } | |
1162 | ||
428870ff BB |
1163 | int |
1164 | zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, | |
1165 | int key_numints, dmu_tx_t *tx) | |
1166 | { | |
1167 | zap_t *zap; | |
1168 | int err; | |
1169 | zap_name_t *zn; | |
1170 | ||
1171 | err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, &zap); | |
1172 | if (err) | |
1173 | return (err); | |
1174 | zn = zap_name_alloc_uint64(zap, key, key_numints); | |
1175 | if (zn == NULL) { | |
1176 | zap_unlockdir(zap); | |
1177 | return (ENOTSUP); | |
1178 | } | |
1179 | err = fzap_remove(zn, tx); | |
1180 | zap_name_free(zn); | |
1181 | zap_unlockdir(zap); | |
1182 | return (err); | |
1183 | } | |
1184 | ||
34dc7c2f BB |
1185 | /* |
1186 | * Routines for iterating over the attributes. | |
1187 | */ | |
1188 | ||
34dc7c2f BB |
1189 | void |
1190 | zap_cursor_init_serialized(zap_cursor_t *zc, objset_t *os, uint64_t zapobj, | |
1191 | uint64_t serialized) | |
1192 | { | |
1193 | zc->zc_objset = os; | |
1194 | zc->zc_zap = NULL; | |
1195 | zc->zc_leaf = NULL; | |
1196 | zc->zc_zapobj = zapobj; | |
428870ff BB |
1197 | zc->zc_serialized = serialized; |
1198 | zc->zc_hash = 0; | |
1199 | zc->zc_cd = 0; | |
34dc7c2f BB |
1200 | } |
1201 | ||
1202 | void | |
1203 | zap_cursor_init(zap_cursor_t *zc, objset_t *os, uint64_t zapobj) | |
1204 | { | |
1205 | zap_cursor_init_serialized(zc, os, zapobj, 0); | |
1206 | } | |
1207 | ||
1208 | void | |
1209 | zap_cursor_fini(zap_cursor_t *zc) | |
1210 | { | |
1211 | if (zc->zc_zap) { | |
1212 | rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); | |
1213 | zap_unlockdir(zc->zc_zap); | |
1214 | zc->zc_zap = NULL; | |
1215 | } | |
1216 | if (zc->zc_leaf) { | |
1217 | rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); | |
1218 | zap_put_leaf(zc->zc_leaf); | |
1219 | zc->zc_leaf = NULL; | |
1220 | } | |
1221 | zc->zc_objset = NULL; | |
1222 | } | |
1223 | ||
1224 | uint64_t | |
1225 | zap_cursor_serialize(zap_cursor_t *zc) | |
1226 | { | |
1227 | if (zc->zc_hash == -1ULL) | |
1228 | return (-1ULL); | |
428870ff BB |
1229 | if (zc->zc_zap == NULL) |
1230 | return (zc->zc_serialized); | |
1231 | ASSERT((zc->zc_hash & zap_maxcd(zc->zc_zap)) == 0); | |
1232 | ASSERT(zc->zc_cd < zap_maxcd(zc->zc_zap)); | |
1233 | ||
1234 | /* | |
1235 | * We want to keep the high 32 bits of the cursor zero if we can, so | |
1236 | * that 32-bit programs can access this. So usually use a small | |
1237 | * (28-bit) hash value so we can fit 4 bits of cd into the low 32-bits | |
1238 | * of the cursor. | |
1239 | * | |
1240 | * [ collision differentiator | zap_hashbits()-bit hash value ] | |
1241 | */ | |
1242 | return ((zc->zc_hash >> (64 - zap_hashbits(zc->zc_zap))) | | |
1243 | ((uint64_t)zc->zc_cd << zap_hashbits(zc->zc_zap))); | |
34dc7c2f BB |
1244 | } |
1245 | ||
1246 | int | |
1247 | zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) | |
1248 | { | |
1249 | int err; | |
1250 | avl_index_t idx; | |
1251 | mzap_ent_t mze_tofind; | |
1252 | mzap_ent_t *mze; | |
1253 | ||
1254 | if (zc->zc_hash == -1ULL) | |
1255 | return (ENOENT); | |
1256 | ||
1257 | if (zc->zc_zap == NULL) { | |
428870ff | 1258 | int hb; |
34dc7c2f BB |
1259 | err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, |
1260 | RW_READER, TRUE, FALSE, &zc->zc_zap); | |
1261 | if (err) | |
1262 | return (err); | |
428870ff BB |
1263 | |
1264 | /* | |
1265 | * To support zap_cursor_init_serialized, advance, retrieve, | |
1266 | * we must add to the existing zc_cd, which may already | |
1267 | * be 1 due to the zap_cursor_advance. | |
1268 | */ | |
1269 | ASSERT(zc->zc_hash == 0); | |
1270 | hb = zap_hashbits(zc->zc_zap); | |
1271 | zc->zc_hash = zc->zc_serialized << (64 - hb); | |
1272 | zc->zc_cd += zc->zc_serialized >> hb; | |
1273 | if (zc->zc_cd >= zap_maxcd(zc->zc_zap)) /* corrupt serialized */ | |
1274 | zc->zc_cd = 0; | |
34dc7c2f BB |
1275 | } else { |
1276 | rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); | |
1277 | } | |
1278 | if (!zc->zc_zap->zap_ismicro) { | |
1279 | err = fzap_cursor_retrieve(zc->zc_zap, zc, za); | |
1280 | } else { | |
1281 | err = ENOENT; | |
1282 | ||
1283 | mze_tofind.mze_hash = zc->zc_hash; | |
428870ff | 1284 | mze_tofind.mze_cd = zc->zc_cd; |
34dc7c2f BB |
1285 | |
1286 | mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); | |
1287 | if (mze == NULL) { | |
1288 | mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, | |
1289 | idx, AVL_AFTER); | |
1290 | } | |
1291 | if (mze) { | |
428870ff BB |
1292 | mzap_ent_phys_t *mzep = MZE_PHYS(zc->zc_zap, mze); |
1293 | ASSERT3U(mze->mze_cd, ==, mzep->mze_cd); | |
34dc7c2f BB |
1294 | za->za_normalization_conflict = |
1295 | mzap_normalization_conflict(zc->zc_zap, NULL, mze); | |
1296 | za->za_integer_length = 8; | |
1297 | za->za_num_integers = 1; | |
428870ff BB |
1298 | za->za_first_integer = mzep->mze_value; |
1299 | (void) strcpy(za->za_name, mzep->mze_name); | |
34dc7c2f | 1300 | zc->zc_hash = mze->mze_hash; |
428870ff | 1301 | zc->zc_cd = mze->mze_cd; |
34dc7c2f BB |
1302 | err = 0; |
1303 | } else { | |
1304 | zc->zc_hash = -1ULL; | |
1305 | } | |
1306 | } | |
1307 | rw_exit(&zc->zc_zap->zap_rwlock); | |
1308 | return (err); | |
1309 | } | |
1310 | ||
1311 | void | |
1312 | zap_cursor_advance(zap_cursor_t *zc) | |
1313 | { | |
1314 | if (zc->zc_hash == -1ULL) | |
1315 | return; | |
1316 | zc->zc_cd++; | |
428870ff BB |
1317 | } |
1318 | ||
1319 | int | |
1320 | zap_cursor_move_to_key(zap_cursor_t *zc, const char *name, matchtype_t mt) | |
1321 | { | |
1322 | int err = 0; | |
1323 | mzap_ent_t *mze; | |
1324 | zap_name_t *zn; | |
1325 | ||
1326 | if (zc->zc_zap == NULL) { | |
1327 | err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, | |
1328 | RW_READER, TRUE, FALSE, &zc->zc_zap); | |
1329 | if (err) | |
1330 | return (err); | |
1331 | } else { | |
1332 | rw_enter(&zc->zc_zap->zap_rwlock, RW_READER); | |
34dc7c2f | 1333 | } |
428870ff BB |
1334 | |
1335 | zn = zap_name_alloc(zc->zc_zap, name, mt); | |
1336 | if (zn == NULL) { | |
1337 | rw_exit(&zc->zc_zap->zap_rwlock); | |
1338 | return (ENOTSUP); | |
1339 | } | |
1340 | ||
1341 | if (!zc->zc_zap->zap_ismicro) { | |
1342 | err = fzap_cursor_move_to_key(zc, zn); | |
1343 | } else { | |
1344 | mze = mze_find(zn); | |
1345 | if (mze == NULL) { | |
1346 | err = ENOENT; | |
1347 | goto out; | |
1348 | } | |
1349 | zc->zc_hash = mze->mze_hash; | |
1350 | zc->zc_cd = mze->mze_cd; | |
1351 | } | |
1352 | ||
1353 | out: | |
1354 | zap_name_free(zn); | |
1355 | rw_exit(&zc->zc_zap->zap_rwlock); | |
1356 | return (err); | |
34dc7c2f BB |
1357 | } |
1358 | ||
1359 | int | |
1360 | zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) | |
1361 | { | |
1362 | int err; | |
1363 | zap_t *zap; | |
1364 | ||
1365 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); | |
1366 | if (err) | |
1367 | return (err); | |
1368 | ||
1369 | bzero(zs, sizeof (zap_stats_t)); | |
1370 | ||
1371 | if (zap->zap_ismicro) { | |
1372 | zs->zs_blocksize = zap->zap_dbuf->db_size; | |
1373 | zs->zs_num_entries = zap->zap_m.zap_num_entries; | |
1374 | zs->zs_num_blocks = 1; | |
1375 | } else { | |
1376 | fzap_get_stats(zap, zs); | |
1377 | } | |
1378 | zap_unlockdir(zap); | |
1379 | return (0); | |
1380 | } | |
9babb374 BB |
1381 | |
1382 | int | |
1383 | zap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add, | |
45d1cae3 | 1384 | uint64_t *towrite, uint64_t *tooverwrite) |
9babb374 BB |
1385 | { |
1386 | zap_t *zap; | |
1387 | int err = 0; | |
1388 | ||
1389 | ||
1390 | /* | |
1391 | * Since, we don't have a name, we cannot figure out which blocks will | |
1392 | * be affected in this operation. So, account for the worst case : | |
1393 | * - 3 blocks overwritten: target leaf, ptrtbl block, header block | |
1394 | * - 4 new blocks written if adding: | |
1395 | * - 2 blocks for possibly split leaves, | |
1396 | * - 2 grown ptrtbl blocks | |
1397 | * | |
1398 | * This also accomodates the case where an add operation to a fairly | |
1399 | * large microzap results in a promotion to fatzap. | |
1400 | */ | |
1401 | if (name == NULL) { | |
1402 | *towrite += (3 + (add ? 4 : 0)) * SPA_MAXBLOCKSIZE; | |
1403 | return (err); | |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * We lock the zap with adding == FALSE. Because, if we pass | |
1408 | * the actual value of add, it could trigger a mzap_upgrade(). | |
1409 | * At present we are just evaluating the possibility of this operation | |
1410 | * and hence we donot want to trigger an upgrade. | |
1411 | */ | |
1412 | err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap); | |
1413 | if (err) | |
1414 | return (err); | |
1415 | ||
1416 | if (!zap->zap_ismicro) { | |
1417 | zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT); | |
1418 | if (zn) { | |
1419 | err = fzap_count_write(zn, add, towrite, | |
1420 | tooverwrite); | |
1421 | zap_name_free(zn); | |
1422 | } else { | |
1423 | /* | |
1424 | * We treat this case as similar to (name == NULL) | |
1425 | */ | |
1426 | *towrite += (3 + (add ? 4 : 0)) * SPA_MAXBLOCKSIZE; | |
1427 | } | |
1428 | } else { | |
45d1cae3 BB |
1429 | /* |
1430 | * We are here if (name != NULL) and this is a micro-zap. | |
1431 | * We account for the header block depending on whether it | |
1432 | * is freeable. | |
1433 | * | |
1434 | * Incase of an add-operation it is hard to find out | |
1435 | * if this add will promote this microzap to fatzap. | |
1436 | * Hence, we consider the worst case and account for the | |
1437 | * blocks assuming this microzap would be promoted to a | |
1438 | * fatzap. | |
1439 | * | |
1440 | * 1 block overwritten : header block | |
1441 | * 4 new blocks written : 2 new split leaf, 2 grown | |
1442 | * ptrtbl blocks | |
1443 | */ | |
1444 | if (dmu_buf_freeable(zap->zap_dbuf)) | |
1445 | *tooverwrite += SPA_MAXBLOCKSIZE; | |
1446 | else | |
1447 | *towrite += SPA_MAXBLOCKSIZE; | |
1448 | ||
1449 | if (add) { | |
1450 | *towrite += 4 * SPA_MAXBLOCKSIZE; | |
9babb374 BB |
1451 | } |
1452 | } | |
1453 | ||
1454 | zap_unlockdir(zap); | |
1455 | return (err); | |
1456 | } | |
c28b2279 BB |
1457 | |
1458 | #if defined(_KERNEL) && defined(HAVE_SPL) | |
1459 | EXPORT_SYMBOL(zap_add); | |
1460 | EXPORT_SYMBOL(zap_create); | |
1461 | EXPORT_SYMBOL(zap_cursor_advance); | |
1462 | EXPORT_SYMBOL(zap_cursor_fini); | |
1463 | EXPORT_SYMBOL(zap_cursor_init); | |
1464 | EXPORT_SYMBOL(zap_cursor_init_serialized); | |
1465 | EXPORT_SYMBOL(zap_cursor_move_to_key); | |
1466 | EXPORT_SYMBOL(zap_cursor_retrieve); | |
1467 | EXPORT_SYMBOL(zap_cursor_serialize); | |
1468 | EXPORT_SYMBOL(zap_lookup); | |
1469 | EXPORT_SYMBOL(zap_lookup_norm); | |
1470 | EXPORT_SYMBOL(zap_remove); | |
1471 | EXPORT_SYMBOL(zap_update); | |
1472 | #endif |