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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. |
cae5b340 | 23 | * Copyright (c) 2012, 2016 by Delphix. All rights reserved. |
e10b0808 | 24 | * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. |
34dc7c2f BB |
25 | */ |
26 | ||
34dc7c2f BB |
27 | /* |
28 | * This file contains the top half of the zfs directory structure | |
29 | * implementation. The bottom half is in zap_leaf.c. | |
30 | * | |
31 | * The zdir is an extendable hash data structure. There is a table of | |
32 | * pointers to buckets (zap_t->zd_data->zd_leafs). The buckets are | |
33 | * each a constant size and hold a variable number of directory entries. | |
34 | * The buckets (aka "leaf nodes") are implemented in zap_leaf.c. | |
35 | * | |
36 | * The pointer table holds a power of 2 number of pointers. | |
37 | * (1<<zap_t->zd_data->zd_phys->zd_prefix_len). The bucket pointed to | |
38 | * by the pointer at index i in the table holds entries whose hash value | |
39 | * has a zd_prefix_len - bit prefix | |
40 | */ | |
41 | ||
42 | #include <sys/spa.h> | |
43 | #include <sys/dmu.h> | |
44 | #include <sys/zfs_context.h> | |
45 | #include <sys/zfs_znode.h> | |
9babb374 | 46 | #include <sys/fs/zfs.h> |
34dc7c2f BB |
47 | #include <sys/zap.h> |
48 | #include <sys/refcount.h> | |
49 | #include <sys/zap_impl.h> | |
50 | #include <sys/zap_leaf.h> | |
51 | ||
52 | int fzap_default_block_shift = 14; /* 16k blocksize */ | |
53 | ||
e10b0808 | 54 | extern inline zap_phys_t *zap_f_phys(zap_t *zap); |
34dc7c2f | 55 | |
e10b0808 | 56 | static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks); |
34dc7c2f BB |
57 | |
58 | void | |
59 | fzap_byteswap(void *vbuf, size_t size) | |
60 | { | |
61 | uint64_t block_type; | |
62 | ||
63 | block_type = *(uint64_t *)vbuf; | |
64 | ||
65 | if (block_type == ZBT_LEAF || block_type == BSWAP_64(ZBT_LEAF)) | |
66 | zap_leaf_byteswap(vbuf, size); | |
67 | else { | |
68 | /* it's a ptrtbl block */ | |
69 | byteswap_uint64_array(vbuf, size); | |
70 | } | |
71 | } | |
72 | ||
73 | void | |
428870ff | 74 | fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags) |
34dc7c2f BB |
75 | { |
76 | dmu_buf_t *db; | |
77 | zap_leaf_t *l; | |
78 | int i; | |
79 | zap_phys_t *zp; | |
80 | ||
81 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
82 | zap->zap_ismicro = FALSE; | |
83 | ||
cae5b340 AX |
84 | zap->zap_dbu.dbu_evict_func_sync = zap_evict_sync; |
85 | zap->zap_dbu.dbu_evict_func_async = NULL; | |
34dc7c2f | 86 | |
cae5b340 | 87 | mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, MUTEX_DEFAULT, 0); |
ea04106b | 88 | zap->zap_f.zap_block_shift = highbit64(zap->zap_dbuf->db_size) - 1; |
34dc7c2f | 89 | |
e10b0808 | 90 | zp = zap_f_phys(zap); |
34dc7c2f BB |
91 | /* |
92 | * explicitly zero it since it might be coming from an | |
93 | * initialized microzap | |
94 | */ | |
95 | bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size); | |
96 | zp->zap_block_type = ZBT_HEADER; | |
97 | zp->zap_magic = ZAP_MAGIC; | |
98 | ||
99 | zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap); | |
100 | ||
101 | zp->zap_freeblk = 2; /* block 1 will be the first leaf */ | |
102 | zp->zap_num_leafs = 1; | |
103 | zp->zap_num_entries = 0; | |
104 | zp->zap_salt = zap->zap_salt; | |
105 | zp->zap_normflags = zap->zap_normflags; | |
428870ff | 106 | zp->zap_flags = flags; |
34dc7c2f BB |
107 | |
108 | /* block 1 will be the first leaf */ | |
109 | for (i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) | |
110 | ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1; | |
111 | ||
112 | /* | |
113 | * set up block 1 - the first leaf | |
114 | */ | |
115 | VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff | 116 | 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH)); |
34dc7c2f BB |
117 | dmu_buf_will_dirty(db, tx); |
118 | ||
ea04106b | 119 | l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); |
34dc7c2f | 120 | l->l_dbuf = db; |
34dc7c2f BB |
121 | |
122 | zap_leaf_init(l, zp->zap_normflags != 0); | |
123 | ||
124 | kmem_free(l, sizeof (zap_leaf_t)); | |
125 | dmu_buf_rele(db, FTAG); | |
126 | } | |
127 | ||
128 | static int | |
129 | zap_tryupgradedir(zap_t *zap, dmu_tx_t *tx) | |
130 | { | |
131 | if (RW_WRITE_HELD(&zap->zap_rwlock)) | |
132 | return (1); | |
133 | if (rw_tryupgrade(&zap->zap_rwlock)) { | |
134 | dmu_buf_will_dirty(zap->zap_dbuf, tx); | |
135 | return (1); | |
136 | } | |
137 | return (0); | |
138 | } | |
139 | ||
140 | /* | |
141 | * Generic routines for dealing with the pointer & cookie tables. | |
142 | */ | |
143 | ||
144 | static int | |
145 | zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, | |
146 | void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n), | |
147 | dmu_tx_t *tx) | |
148 | { | |
149 | uint64_t b, newblk; | |
150 | dmu_buf_t *db_old, *db_new; | |
151 | int err; | |
152 | int bs = FZAP_BLOCK_SHIFT(zap); | |
153 | int hepb = 1<<(bs-4); | |
154 | /* hepb = half the number of entries in a block */ | |
155 | ||
156 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
157 | ASSERT(tbl->zt_blk != 0); | |
158 | ASSERT(tbl->zt_numblks > 0); | |
159 | ||
160 | if (tbl->zt_nextblk != 0) { | |
161 | newblk = tbl->zt_nextblk; | |
162 | } else { | |
163 | newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2); | |
164 | tbl->zt_nextblk = newblk; | |
c06d4368 | 165 | ASSERT0(tbl->zt_blks_copied); |
cae5b340 AX |
166 | dmu_prefetch(zap->zap_objset, zap->zap_object, 0, |
167 | tbl->zt_blk << bs, tbl->zt_numblks << bs, | |
168 | ZIO_PRIORITY_SYNC_READ); | |
34dc7c2f BB |
169 | } |
170 | ||
171 | /* | |
172 | * Copy the ptrtbl from the old to new location. | |
173 | */ | |
174 | ||
175 | b = tbl->zt_blks_copied; | |
176 | err = dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff | 177 | (tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH); |
34dc7c2f BB |
178 | if (err) |
179 | return (err); | |
180 | ||
181 | /* first half of entries in old[b] go to new[2*b+0] */ | |
182 | VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff | 183 | (newblk + 2*b+0) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); |
34dc7c2f BB |
184 | dmu_buf_will_dirty(db_new, tx); |
185 | transfer_func(db_old->db_data, db_new->db_data, hepb); | |
186 | dmu_buf_rele(db_new, FTAG); | |
187 | ||
188 | /* second half of entries in old[b] go to new[2*b+1] */ | |
189 | VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff | 190 | (newblk + 2*b+1) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); |
34dc7c2f BB |
191 | dmu_buf_will_dirty(db_new, tx); |
192 | transfer_func((uint64_t *)db_old->db_data + hepb, | |
193 | db_new->db_data, hepb); | |
194 | dmu_buf_rele(db_new, FTAG); | |
195 | ||
196 | dmu_buf_rele(db_old, FTAG); | |
197 | ||
198 | tbl->zt_blks_copied++; | |
199 | ||
200 | dprintf("copied block %llu of %llu\n", | |
201 | tbl->zt_blks_copied, tbl->zt_numblks); | |
202 | ||
203 | if (tbl->zt_blks_copied == tbl->zt_numblks) { | |
204 | (void) dmu_free_range(zap->zap_objset, zap->zap_object, | |
205 | tbl->zt_blk << bs, tbl->zt_numblks << bs, tx); | |
206 | ||
207 | tbl->zt_blk = newblk; | |
208 | tbl->zt_numblks *= 2; | |
209 | tbl->zt_shift++; | |
210 | tbl->zt_nextblk = 0; | |
211 | tbl->zt_blks_copied = 0; | |
212 | ||
ea04106b | 213 | dprintf("finished; numblocks now %llu (%uk entries)\n", |
34dc7c2f BB |
214 | tbl->zt_numblks, 1<<(tbl->zt_shift-10)); |
215 | } | |
216 | ||
217 | return (0); | |
218 | } | |
219 | ||
220 | static int | |
221 | zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, | |
222 | dmu_tx_t *tx) | |
223 | { | |
224 | int err; | |
225 | uint64_t blk, off; | |
226 | int bs = FZAP_BLOCK_SHIFT(zap); | |
227 | dmu_buf_t *db; | |
228 | ||
229 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
230 | ASSERT(tbl->zt_blk != 0); | |
231 | ||
232 | dprintf("storing %llx at index %llx\n", val, idx); | |
233 | ||
234 | blk = idx >> (bs-3); | |
235 | off = idx & ((1<<(bs-3))-1); | |
236 | ||
237 | err = dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff | 238 | (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); |
34dc7c2f BB |
239 | if (err) |
240 | return (err); | |
241 | dmu_buf_will_dirty(db, tx); | |
242 | ||
243 | if (tbl->zt_nextblk != 0) { | |
244 | uint64_t idx2 = idx * 2; | |
245 | uint64_t blk2 = idx2 >> (bs-3); | |
246 | uint64_t off2 = idx2 & ((1<<(bs-3))-1); | |
247 | dmu_buf_t *db2; | |
248 | ||
249 | err = dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff BB |
250 | (tbl->zt_nextblk + blk2) << bs, FTAG, &db2, |
251 | DMU_READ_NO_PREFETCH); | |
34dc7c2f BB |
252 | if (err) { |
253 | dmu_buf_rele(db, FTAG); | |
254 | return (err); | |
255 | } | |
256 | dmu_buf_will_dirty(db2, tx); | |
257 | ((uint64_t *)db2->db_data)[off2] = val; | |
258 | ((uint64_t *)db2->db_data)[off2+1] = val; | |
259 | dmu_buf_rele(db2, FTAG); | |
260 | } | |
261 | ||
262 | ((uint64_t *)db->db_data)[off] = val; | |
263 | dmu_buf_rele(db, FTAG); | |
264 | ||
265 | return (0); | |
266 | } | |
267 | ||
268 | static int | |
269 | zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) | |
270 | { | |
271 | uint64_t blk, off; | |
272 | int err; | |
273 | dmu_buf_t *db; | |
cae5b340 | 274 | dnode_t *dn; |
34dc7c2f BB |
275 | int bs = FZAP_BLOCK_SHIFT(zap); |
276 | ||
277 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
278 | ||
279 | blk = idx >> (bs-3); | |
280 | off = idx & ((1<<(bs-3))-1); | |
281 | ||
cae5b340 AX |
282 | /* |
283 | * Note: this is equivalent to dmu_buf_hold(), but we use | |
284 | * _dnode_enter / _by_dnode because it's faster because we don't | |
285 | * have to hold the dnode. | |
286 | */ | |
287 | dn = dmu_buf_dnode_enter(zap->zap_dbuf); | |
288 | err = dmu_buf_hold_by_dnode(dn, | |
428870ff | 289 | (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); |
cae5b340 | 290 | dmu_buf_dnode_exit(zap->zap_dbuf); |
34dc7c2f BB |
291 | if (err) |
292 | return (err); | |
293 | *valp = ((uint64_t *)db->db_data)[off]; | |
294 | dmu_buf_rele(db, FTAG); | |
295 | ||
296 | if (tbl->zt_nextblk != 0) { | |
297 | /* | |
298 | * read the nextblk for the sake of i/o error checking, | |
299 | * so that zap_table_load() will catch errors for | |
300 | * zap_table_store. | |
301 | */ | |
302 | blk = (idx*2) >> (bs-3); | |
303 | ||
cae5b340 AX |
304 | dn = dmu_buf_dnode_enter(zap->zap_dbuf); |
305 | err = dmu_buf_hold_by_dnode(dn, | |
428870ff BB |
306 | (tbl->zt_nextblk + blk) << bs, FTAG, &db, |
307 | DMU_READ_NO_PREFETCH); | |
cae5b340 | 308 | dmu_buf_dnode_exit(zap->zap_dbuf); |
a08ee875 LG |
309 | if (err == 0) |
310 | dmu_buf_rele(db, FTAG); | |
34dc7c2f BB |
311 | } |
312 | return (err); | |
313 | } | |
314 | ||
315 | /* | |
316 | * Routines for growing the ptrtbl. | |
317 | */ | |
318 | ||
319 | static void | |
320 | zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n) | |
321 | { | |
322 | int i; | |
323 | for (i = 0; i < n; i++) { | |
324 | uint64_t lb = src[i]; | |
325 | dst[2*i+0] = lb; | |
326 | dst[2*i+1] = lb; | |
327 | } | |
328 | } | |
329 | ||
330 | static int | |
331 | zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) | |
332 | { | |
428870ff BB |
333 | /* |
334 | * The pointer table should never use more hash bits than we | |
335 | * have (otherwise we'd be using useless zero bits to index it). | |
336 | * If we are within 2 bits of running out, stop growing, since | |
337 | * this is already an aberrant condition. | |
338 | */ | |
e10b0808 | 339 | if (zap_f_phys(zap)->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2) |
a08ee875 | 340 | return (SET_ERROR(ENOSPC)); |
34dc7c2f | 341 | |
e10b0808 | 342 | if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { |
34dc7c2f BB |
343 | /* |
344 | * We are outgrowing the "embedded" ptrtbl (the one | |
345 | * stored in the header block). Give it its own entire | |
346 | * block, which will double the size of the ptrtbl. | |
347 | */ | |
348 | uint64_t newblk; | |
349 | dmu_buf_t *db_new; | |
350 | int err; | |
351 | ||
e10b0808 | 352 | ASSERT3U(zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, |
34dc7c2f | 353 | ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); |
e10b0808 | 354 | ASSERT0(zap_f_phys(zap)->zap_ptrtbl.zt_blk); |
34dc7c2f BB |
355 | |
356 | newblk = zap_allocate_blocks(zap, 1); | |
357 | err = dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff BB |
358 | newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new, |
359 | DMU_READ_NO_PREFETCH); | |
34dc7c2f BB |
360 | if (err) |
361 | return (err); | |
362 | dmu_buf_will_dirty(db_new, tx); | |
363 | zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), | |
364 | db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); | |
365 | dmu_buf_rele(db_new, FTAG); | |
366 | ||
e10b0808 AX |
367 | zap_f_phys(zap)->zap_ptrtbl.zt_blk = newblk; |
368 | zap_f_phys(zap)->zap_ptrtbl.zt_numblks = 1; | |
369 | zap_f_phys(zap)->zap_ptrtbl.zt_shift++; | |
34dc7c2f | 370 | |
e10b0808 AX |
371 | ASSERT3U(1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, |
372 | zap_f_phys(zap)->zap_ptrtbl.zt_numblks << | |
34dc7c2f BB |
373 | (FZAP_BLOCK_SHIFT(zap)-3)); |
374 | ||
375 | return (0); | |
376 | } else { | |
e10b0808 | 377 | return (zap_table_grow(zap, &zap_f_phys(zap)->zap_ptrtbl, |
34dc7c2f BB |
378 | zap_ptrtbl_transfer, tx)); |
379 | } | |
380 | } | |
381 | ||
382 | static void | |
383 | zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) | |
384 | { | |
385 | dmu_buf_will_dirty(zap->zap_dbuf, tx); | |
386 | mutex_enter(&zap->zap_f.zap_num_entries_mtx); | |
e10b0808 AX |
387 | ASSERT(delta > 0 || zap_f_phys(zap)->zap_num_entries >= -delta); |
388 | zap_f_phys(zap)->zap_num_entries += delta; | |
34dc7c2f BB |
389 | mutex_exit(&zap->zap_f.zap_num_entries_mtx); |
390 | } | |
391 | ||
392 | static uint64_t | |
393 | zap_allocate_blocks(zap_t *zap, int nblocks) | |
394 | { | |
395 | uint64_t newblk; | |
396 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
e10b0808 AX |
397 | newblk = zap_f_phys(zap)->zap_freeblk; |
398 | zap_f_phys(zap)->zap_freeblk += nblocks; | |
34dc7c2f BB |
399 | return (newblk); |
400 | } | |
401 | ||
e10b0808 | 402 | static void |
cae5b340 | 403 | zap_leaf_evict_sync(void *dbu) |
e10b0808 AX |
404 | { |
405 | zap_leaf_t *l = dbu; | |
406 | ||
407 | rw_destroy(&l->l_rwlock); | |
408 | kmem_free(l, sizeof (zap_leaf_t)); | |
409 | } | |
410 | ||
34dc7c2f BB |
411 | static zap_leaf_t * |
412 | zap_create_leaf(zap_t *zap, dmu_tx_t *tx) | |
413 | { | |
414 | void *winner; | |
e10b0808 | 415 | zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); |
34dc7c2f BB |
416 | |
417 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
418 | ||
cae5b340 | 419 | rw_init(&l->l_rwlock, NULL, RW_NOLOCKDEP, NULL); |
34dc7c2f BB |
420 | rw_enter(&l->l_rwlock, RW_WRITER); |
421 | l->l_blkid = zap_allocate_blocks(zap, 1); | |
422 | l->l_dbuf = NULL; | |
34dc7c2f BB |
423 | |
424 | VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff BB |
425 | l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf, |
426 | DMU_READ_NO_PREFETCH)); | |
cae5b340 | 427 | dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); |
e10b0808 | 428 | winner = dmu_buf_set_user(l->l_dbuf, &l->l_dbu); |
34dc7c2f BB |
429 | ASSERT(winner == NULL); |
430 | dmu_buf_will_dirty(l->l_dbuf, tx); | |
431 | ||
432 | zap_leaf_init(l, zap->zap_normflags != 0); | |
433 | ||
e10b0808 | 434 | zap_f_phys(zap)->zap_num_leafs++; |
34dc7c2f BB |
435 | |
436 | return (l); | |
437 | } | |
438 | ||
439 | int | |
440 | fzap_count(zap_t *zap, uint64_t *count) | |
441 | { | |
442 | ASSERT(!zap->zap_ismicro); | |
443 | mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ | |
e10b0808 | 444 | *count = zap_f_phys(zap)->zap_num_entries; |
34dc7c2f BB |
445 | mutex_exit(&zap->zap_f.zap_num_entries_mtx); |
446 | return (0); | |
447 | } | |
448 | ||
449 | /* | |
450 | * Routines for obtaining zap_leaf_t's | |
451 | */ | |
452 | ||
453 | void | |
454 | zap_put_leaf(zap_leaf_t *l) | |
455 | { | |
456 | rw_exit(&l->l_rwlock); | |
457 | dmu_buf_rele(l->l_dbuf, NULL); | |
458 | } | |
459 | ||
34dc7c2f BB |
460 | static zap_leaf_t * |
461 | zap_open_leaf(uint64_t blkid, dmu_buf_t *db) | |
462 | { | |
463 | zap_leaf_t *l, *winner; | |
464 | ||
465 | ASSERT(blkid != 0); | |
466 | ||
e10b0808 | 467 | l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); |
ef5319df | 468 | rw_init(&l->l_rwlock, NULL, RW_DEFAULT, NULL); |
34dc7c2f BB |
469 | rw_enter(&l->l_rwlock, RW_WRITER); |
470 | l->l_blkid = blkid; | |
ea04106b | 471 | l->l_bs = highbit64(db->db_size) - 1; |
34dc7c2f | 472 | l->l_dbuf = db; |
34dc7c2f | 473 | |
cae5b340 | 474 | dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); |
e10b0808 | 475 | winner = dmu_buf_set_user(db, &l->l_dbu); |
34dc7c2f BB |
476 | |
477 | rw_exit(&l->l_rwlock); | |
478 | if (winner != NULL) { | |
479 | /* someone else set it first */ | |
cae5b340 | 480 | zap_leaf_evict_sync(&l->l_dbu); |
34dc7c2f BB |
481 | l = winner; |
482 | } | |
483 | ||
484 | /* | |
485 | * lhr_pad was previously used for the next leaf in the leaf | |
486 | * chain. There should be no chained leafs (as we have removed | |
487 | * support for them). | |
488 | */ | |
e10b0808 | 489 | ASSERT0(zap_leaf_phys(l)->l_hdr.lh_pad1); |
34dc7c2f BB |
490 | |
491 | /* | |
492 | * There should be more hash entries than there can be | |
493 | * chunks to put in the hash table | |
494 | */ | |
495 | ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); | |
496 | ||
497 | /* The chunks should begin at the end of the hash table */ | |
b8864a23 | 498 | ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, (zap_leaf_chunk_t *) |
e10b0808 | 499 | &zap_leaf_phys(l)->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); |
34dc7c2f BB |
500 | |
501 | /* The chunks should end at the end of the block */ | |
502 | ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - | |
e10b0808 | 503 | (uintptr_t)zap_leaf_phys(l), ==, l->l_dbuf->db_size); |
34dc7c2f BB |
504 | |
505 | return (l); | |
506 | } | |
507 | ||
508 | static int | |
509 | zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, | |
510 | zap_leaf_t **lp) | |
511 | { | |
512 | dmu_buf_t *db; | |
513 | zap_leaf_t *l; | |
514 | int bs = FZAP_BLOCK_SHIFT(zap); | |
515 | int err; | |
cae5b340 | 516 | dnode_t *dn; |
34dc7c2f BB |
517 | |
518 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
519 | ||
94a40997 AX |
520 | /* |
521 | * If system crashed just after dmu_free_long_range in zfs_rmnode, we | |
522 | * would be left with an empty xattr dir in delete queue. blkid=0 | |
523 | * would be passed in when doing zfs_purgedir. If that's the case we | |
524 | * should just return immediately. The underlying objects should | |
525 | * already be freed, so this should be perfectly fine. | |
526 | */ | |
527 | if (blkid == 0) | |
528 | return (ENOENT); | |
529 | ||
cae5b340 AX |
530 | dn = dmu_buf_dnode_enter(zap->zap_dbuf); |
531 | err = dmu_buf_hold_by_dnode(dn, | |
428870ff | 532 | blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH); |
cae5b340 | 533 | dmu_buf_dnode_exit(zap->zap_dbuf); |
34dc7c2f BB |
534 | if (err) |
535 | return (err); | |
536 | ||
537 | ASSERT3U(db->db_object, ==, zap->zap_object); | |
538 | ASSERT3U(db->db_offset, ==, blkid << bs); | |
539 | ASSERT3U(db->db_size, ==, 1 << bs); | |
540 | ASSERT(blkid != 0); | |
541 | ||
542 | l = dmu_buf_get_user(db); | |
543 | ||
544 | if (l == NULL) | |
545 | l = zap_open_leaf(blkid, db); | |
546 | ||
547 | rw_enter(&l->l_rwlock, lt); | |
548 | /* | |
e10b0808 | 549 | * Must lock before dirtying, otherwise zap_leaf_phys(l) could change, |
34dc7c2f BB |
550 | * causing ASSERT below to fail. |
551 | */ | |
552 | if (lt == RW_WRITER) | |
553 | dmu_buf_will_dirty(db, tx); | |
554 | ASSERT3U(l->l_blkid, ==, blkid); | |
555 | ASSERT3P(l->l_dbuf, ==, db); | |
e10b0808 AX |
556 | ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_block_type, ==, ZBT_LEAF); |
557 | ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); | |
34dc7c2f BB |
558 | |
559 | *lp = l; | |
560 | return (0); | |
561 | } | |
562 | ||
563 | static int | |
564 | zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) | |
565 | { | |
566 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
567 | ||
e10b0808 | 568 | if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { |
34dc7c2f | 569 | ASSERT3U(idx, <, |
e10b0808 | 570 | (1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift)); |
34dc7c2f BB |
571 | *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); |
572 | return (0); | |
573 | } else { | |
e10b0808 | 574 | return (zap_table_load(zap, &zap_f_phys(zap)->zap_ptrtbl, |
34dc7c2f BB |
575 | idx, valp)); |
576 | } | |
577 | } | |
578 | ||
579 | static int | |
580 | zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) | |
581 | { | |
582 | ASSERT(tx != NULL); | |
583 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
584 | ||
e10b0808 | 585 | if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { |
34dc7c2f BB |
586 | ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; |
587 | return (0); | |
588 | } else { | |
e10b0808 | 589 | return (zap_table_store(zap, &zap_f_phys(zap)->zap_ptrtbl, |
34dc7c2f BB |
590 | idx, blk, tx)); |
591 | } | |
592 | } | |
593 | ||
594 | static int | |
595 | zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) | |
596 | { | |
597 | uint64_t idx, blk; | |
598 | int err; | |
599 | ||
600 | ASSERT(zap->zap_dbuf == NULL || | |
e10b0808 | 601 | zap_f_phys(zap) == zap->zap_dbuf->db_data); |
cae5b340 AX |
602 | |
603 | /* Reality check for corrupt zap objects (leaf or header). */ | |
604 | if ((zap_f_phys(zap)->zap_block_type != ZBT_LEAF && | |
605 | zap_f_phys(zap)->zap_block_type != ZBT_HEADER) || | |
606 | zap_f_phys(zap)->zap_magic != ZAP_MAGIC) { | |
607 | return (SET_ERROR(EIO)); | |
608 | } | |
e10b0808 | 609 | idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift); |
34dc7c2f BB |
610 | err = zap_idx_to_blk(zap, idx, &blk); |
611 | if (err != 0) | |
612 | return (err); | |
613 | err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); | |
614 | ||
e10b0808 AX |
615 | ASSERT(err || |
616 | ZAP_HASH_IDX(h, zap_leaf_phys(*lp)->l_hdr.lh_prefix_len) == | |
617 | zap_leaf_phys(*lp)->l_hdr.lh_prefix); | |
34dc7c2f BB |
618 | return (err); |
619 | } | |
620 | ||
621 | static int | |
cae5b340 AX |
622 | zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, |
623 | void *tag, dmu_tx_t *tx, zap_leaf_t **lp) | |
34dc7c2f BB |
624 | { |
625 | zap_t *zap = zn->zn_zap; | |
626 | uint64_t hash = zn->zn_hash; | |
627 | zap_leaf_t *nl; | |
628 | int prefix_diff, i, err; | |
629 | uint64_t sibling; | |
e10b0808 | 630 | int old_prefix_len = zap_leaf_phys(l)->l_hdr.lh_prefix_len; |
34dc7c2f | 631 | |
e10b0808 | 632 | ASSERT3U(old_prefix_len, <=, zap_f_phys(zap)->zap_ptrtbl.zt_shift); |
34dc7c2f BB |
633 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); |
634 | ||
635 | ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, | |
e10b0808 | 636 | zap_leaf_phys(l)->l_hdr.lh_prefix); |
34dc7c2f BB |
637 | |
638 | if (zap_tryupgradedir(zap, tx) == 0 || | |
e10b0808 | 639 | old_prefix_len == zap_f_phys(zap)->zap_ptrtbl.zt_shift) { |
34dc7c2f BB |
640 | /* We failed to upgrade, or need to grow the pointer table */ |
641 | objset_t *os = zap->zap_objset; | |
642 | uint64_t object = zap->zap_object; | |
643 | ||
644 | zap_put_leaf(l); | |
cae5b340 | 645 | zap_unlockdir(zap, tag); |
34dc7c2f | 646 | err = zap_lockdir(os, object, tx, RW_WRITER, |
cae5b340 | 647 | FALSE, FALSE, tag, &zn->zn_zap); |
34dc7c2f BB |
648 | zap = zn->zn_zap; |
649 | if (err) | |
650 | return (err); | |
651 | ASSERT(!zap->zap_ismicro); | |
652 | ||
653 | while (old_prefix_len == | |
e10b0808 | 654 | zap_f_phys(zap)->zap_ptrtbl.zt_shift) { |
34dc7c2f BB |
655 | err = zap_grow_ptrtbl(zap, tx); |
656 | if (err) | |
657 | return (err); | |
658 | } | |
659 | ||
660 | err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); | |
661 | if (err) | |
662 | return (err); | |
663 | ||
e10b0808 | 664 | if (zap_leaf_phys(l)->l_hdr.lh_prefix_len != old_prefix_len) { |
34dc7c2f BB |
665 | /* it split while our locks were down */ |
666 | *lp = l; | |
667 | return (0); | |
668 | } | |
669 | } | |
670 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
e10b0808 | 671 | ASSERT3U(old_prefix_len, <, zap_f_phys(zap)->zap_ptrtbl.zt_shift); |
34dc7c2f | 672 | ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, |
e10b0808 | 673 | zap_leaf_phys(l)->l_hdr.lh_prefix); |
34dc7c2f | 674 | |
e10b0808 | 675 | prefix_diff = zap_f_phys(zap)->zap_ptrtbl.zt_shift - |
34dc7c2f BB |
676 | (old_prefix_len + 1); |
677 | sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; | |
678 | ||
679 | /* check for i/o errors before doing zap_leaf_split */ | |
680 | for (i = 0; i < (1ULL<<prefix_diff); i++) { | |
681 | uint64_t blk; | |
682 | err = zap_idx_to_blk(zap, sibling+i, &blk); | |
683 | if (err) | |
684 | return (err); | |
685 | ASSERT3U(blk, ==, l->l_blkid); | |
686 | } | |
687 | ||
688 | nl = zap_create_leaf(zap, tx); | |
689 | zap_leaf_split(l, nl, zap->zap_normflags != 0); | |
690 | ||
691 | /* set sibling pointers */ | |
c06d4368 | 692 | for (i = 0; i < (1ULL << prefix_diff); i++) { |
34dc7c2f | 693 | err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx); |
c06d4368 | 694 | ASSERT0(err); /* we checked for i/o errors above */ |
34dc7c2f BB |
695 | } |
696 | ||
cae5b340 AX |
697 | ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_prefix_len, >, 0); |
698 | ||
e10b0808 | 699 | if (hash & (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len))) { |
34dc7c2f BB |
700 | /* we want the sibling */ |
701 | zap_put_leaf(l); | |
702 | *lp = nl; | |
703 | } else { | |
704 | zap_put_leaf(nl); | |
705 | *lp = l; | |
706 | } | |
707 | ||
708 | return (0); | |
709 | } | |
710 | ||
711 | static void | |
cae5b340 AX |
712 | zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, |
713 | void *tag, dmu_tx_t *tx) | |
34dc7c2f BB |
714 | { |
715 | zap_t *zap = zn->zn_zap; | |
e10b0808 AX |
716 | int shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; |
717 | int leaffull = (zap_leaf_phys(l)->l_hdr.lh_prefix_len == shift && | |
718 | zap_leaf_phys(l)->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); | |
34dc7c2f BB |
719 | |
720 | zap_put_leaf(l); | |
721 | ||
e10b0808 | 722 | if (leaffull || zap_f_phys(zap)->zap_ptrtbl.zt_nextblk) { |
34dc7c2f BB |
723 | int err; |
724 | ||
725 | /* | |
726 | * We are in the middle of growing the pointer table, or | |
727 | * this leaf will soon make us grow it. | |
728 | */ | |
729 | if (zap_tryupgradedir(zap, tx) == 0) { | |
730 | objset_t *os = zap->zap_objset; | |
731 | uint64_t zapobj = zap->zap_object; | |
732 | ||
cae5b340 | 733 | zap_unlockdir(zap, tag); |
34dc7c2f | 734 | err = zap_lockdir(os, zapobj, tx, |
cae5b340 | 735 | RW_WRITER, FALSE, FALSE, tag, &zn->zn_zap); |
34dc7c2f BB |
736 | zap = zn->zn_zap; |
737 | if (err) | |
738 | return; | |
739 | } | |
740 | ||
741 | /* could have finished growing while our locks were down */ | |
e10b0808 | 742 | if (zap_f_phys(zap)->zap_ptrtbl.zt_shift == shift) |
34dc7c2f BB |
743 | (void) zap_grow_ptrtbl(zap, tx); |
744 | } | |
745 | } | |
746 | ||
34dc7c2f | 747 | static int |
428870ff | 748 | fzap_checkname(zap_name_t *zn) |
34dc7c2f | 749 | { |
428870ff | 750 | if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN) |
a08ee875 | 751 | return (SET_ERROR(ENAMETOOLONG)); |
428870ff BB |
752 | return (0); |
753 | } | |
34dc7c2f | 754 | |
428870ff BB |
755 | static int |
756 | fzap_checksize(uint64_t integer_size, uint64_t num_integers) | |
757 | { | |
34dc7c2f BB |
758 | /* Only integer sizes supported by C */ |
759 | switch (integer_size) { | |
760 | case 1: | |
761 | case 2: | |
762 | case 4: | |
763 | case 8: | |
764 | break; | |
765 | default: | |
a08ee875 | 766 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
767 | } |
768 | ||
769 | if (integer_size * num_integers > ZAP_MAXVALUELEN) | |
770 | return (E2BIG); | |
771 | ||
772 | return (0); | |
773 | } | |
774 | ||
428870ff BB |
775 | static int |
776 | fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) | |
777 | { | |
778 | int err; | |
779 | ||
780 | if ((err = fzap_checkname(zn)) != 0) | |
781 | return (err); | |
782 | return (fzap_checksize(integer_size, num_integers)); | |
783 | } | |
784 | ||
34dc7c2f BB |
785 | /* |
786 | * Routines for manipulating attributes. | |
787 | */ | |
788 | int | |
789 | fzap_lookup(zap_name_t *zn, | |
790 | uint64_t integer_size, uint64_t num_integers, void *buf, | |
791 | char *realname, int rn_len, boolean_t *ncp) | |
792 | { | |
793 | zap_leaf_t *l; | |
794 | int err; | |
795 | zap_entry_handle_t zeh; | |
796 | ||
428870ff | 797 | if ((err = fzap_checkname(zn)) != 0) |
34dc7c2f BB |
798 | return (err); |
799 | ||
800 | err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); | |
801 | if (err != 0) | |
802 | return (err); | |
803 | err = zap_leaf_lookup(l, zn, &zeh); | |
804 | if (err == 0) { | |
428870ff BB |
805 | if ((err = fzap_checksize(integer_size, num_integers)) != 0) { |
806 | zap_put_leaf(l); | |
807 | return (err); | |
808 | } | |
809 | ||
34dc7c2f | 810 | err = zap_entry_read(&zeh, integer_size, num_integers, buf); |
428870ff | 811 | (void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname); |
34dc7c2f BB |
812 | if (ncp) { |
813 | *ncp = zap_entry_normalization_conflict(&zeh, | |
814 | zn, NULL, zn->zn_zap); | |
815 | } | |
816 | } | |
817 | ||
818 | zap_put_leaf(l); | |
819 | return (err); | |
820 | } | |
821 | ||
822 | int | |
823 | fzap_add_cd(zap_name_t *zn, | |
824 | uint64_t integer_size, uint64_t num_integers, | |
cae5b340 | 825 | const void *val, uint32_t cd, void *tag, dmu_tx_t *tx) |
34dc7c2f BB |
826 | { |
827 | zap_leaf_t *l; | |
828 | int err; | |
829 | zap_entry_handle_t zeh; | |
830 | zap_t *zap = zn->zn_zap; | |
831 | ||
832 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
833 | ASSERT(!zap->zap_ismicro); | |
428870ff | 834 | ASSERT(fzap_check(zn, integer_size, num_integers) == 0); |
34dc7c2f BB |
835 | |
836 | err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); | |
837 | if (err != 0) | |
838 | return (err); | |
839 | retry: | |
840 | err = zap_leaf_lookup(l, zn, &zeh); | |
841 | if (err == 0) { | |
a08ee875 | 842 | err = SET_ERROR(EEXIST); |
34dc7c2f BB |
843 | goto out; |
844 | } | |
845 | if (err != ENOENT) | |
846 | goto out; | |
847 | ||
428870ff | 848 | err = zap_entry_create(l, zn, cd, |
34dc7c2f BB |
849 | integer_size, num_integers, val, &zeh); |
850 | ||
851 | if (err == 0) { | |
852 | zap_increment_num_entries(zap, 1, tx); | |
853 | } else if (err == EAGAIN) { | |
cae5b340 | 854 | err = zap_expand_leaf(zn, l, tag, tx, &l); |
34dc7c2f BB |
855 | zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ |
856 | if (err == 0) | |
857 | goto retry; | |
858 | } | |
859 | ||
860 | out: | |
861 | if (zap != NULL) | |
cae5b340 | 862 | zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); |
34dc7c2f BB |
863 | return (err); |
864 | } | |
865 | ||
866 | int | |
867 | fzap_add(zap_name_t *zn, | |
868 | uint64_t integer_size, uint64_t num_integers, | |
cae5b340 | 869 | const void *val, void *tag, dmu_tx_t *tx) |
34dc7c2f | 870 | { |
428870ff | 871 | int err = fzap_check(zn, integer_size, num_integers); |
34dc7c2f BB |
872 | if (err != 0) |
873 | return (err); | |
874 | ||
875 | return (fzap_add_cd(zn, integer_size, num_integers, | |
cae5b340 | 876 | val, ZAP_NEED_CD, tag, tx)); |
34dc7c2f BB |
877 | } |
878 | ||
879 | int | |
880 | fzap_update(zap_name_t *zn, | |
cae5b340 AX |
881 | int integer_size, uint64_t num_integers, const void *val, |
882 | void *tag, dmu_tx_t *tx) | |
34dc7c2f BB |
883 | { |
884 | zap_leaf_t *l; | |
885 | int err, create; | |
886 | zap_entry_handle_t zeh; | |
887 | zap_t *zap = zn->zn_zap; | |
888 | ||
889 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
428870ff | 890 | err = fzap_check(zn, integer_size, num_integers); |
34dc7c2f BB |
891 | if (err != 0) |
892 | return (err); | |
893 | ||
894 | err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); | |
895 | if (err != 0) | |
896 | return (err); | |
897 | retry: | |
898 | err = zap_leaf_lookup(l, zn, &zeh); | |
899 | create = (err == ENOENT); | |
900 | ASSERT(err == 0 || err == ENOENT); | |
901 | ||
902 | if (create) { | |
428870ff BB |
903 | err = zap_entry_create(l, zn, ZAP_NEED_CD, |
904 | integer_size, num_integers, val, &zeh); | |
34dc7c2f BB |
905 | if (err == 0) |
906 | zap_increment_num_entries(zap, 1, tx); | |
907 | } else { | |
908 | err = zap_entry_update(&zeh, integer_size, num_integers, val); | |
909 | } | |
910 | ||
911 | if (err == EAGAIN) { | |
cae5b340 | 912 | err = zap_expand_leaf(zn, l, tag, tx, &l); |
34dc7c2f BB |
913 | zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ |
914 | if (err == 0) | |
915 | goto retry; | |
916 | } | |
917 | ||
918 | if (zap != NULL) | |
cae5b340 | 919 | zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); |
34dc7c2f BB |
920 | return (err); |
921 | } | |
922 | ||
923 | int | |
924 | fzap_length(zap_name_t *zn, | |
925 | uint64_t *integer_size, uint64_t *num_integers) | |
926 | { | |
927 | zap_leaf_t *l; | |
928 | int err; | |
929 | zap_entry_handle_t zeh; | |
930 | ||
931 | err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); | |
932 | if (err != 0) | |
933 | return (err); | |
934 | err = zap_leaf_lookup(l, zn, &zeh); | |
935 | if (err != 0) | |
936 | goto out; | |
937 | ||
938 | if (integer_size) | |
939 | *integer_size = zeh.zeh_integer_size; | |
940 | if (num_integers) | |
941 | *num_integers = zeh.zeh_num_integers; | |
942 | out: | |
943 | zap_put_leaf(l); | |
944 | return (err); | |
945 | } | |
946 | ||
947 | int | |
948 | fzap_remove(zap_name_t *zn, dmu_tx_t *tx) | |
949 | { | |
950 | zap_leaf_t *l; | |
951 | int err; | |
952 | zap_entry_handle_t zeh; | |
953 | ||
954 | err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); | |
955 | if (err != 0) | |
956 | return (err); | |
957 | err = zap_leaf_lookup(l, zn, &zeh); | |
958 | if (err == 0) { | |
959 | zap_entry_remove(&zeh); | |
960 | zap_increment_num_entries(zn->zn_zap, -1, tx); | |
961 | } | |
962 | zap_put_leaf(l); | |
963 | return (err); | |
964 | } | |
965 | ||
428870ff BB |
966 | void |
967 | fzap_prefetch(zap_name_t *zn) | |
968 | { | |
969 | uint64_t idx, blk; | |
970 | zap_t *zap = zn->zn_zap; | |
971 | int bs; | |
972 | ||
973 | idx = ZAP_HASH_IDX(zn->zn_hash, | |
e10b0808 | 974 | zap_f_phys(zap)->zap_ptrtbl.zt_shift); |
428870ff BB |
975 | if (zap_idx_to_blk(zap, idx, &blk) != 0) |
976 | return; | |
977 | bs = FZAP_BLOCK_SHIFT(zap); | |
cae5b340 AX |
978 | dmu_prefetch(zap->zap_objset, zap->zap_object, 0, blk << bs, 1 << bs, |
979 | ZIO_PRIORITY_SYNC_READ); | |
428870ff BB |
980 | } |
981 | ||
b128c09f BB |
982 | /* |
983 | * Helper functions for consumers. | |
984 | */ | |
985 | ||
9ae529ec CS |
986 | uint64_t |
987 | zap_create_link(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, | |
988 | const char *name, dmu_tx_t *tx) | |
cae5b340 AX |
989 | { |
990 | return (zap_create_link_dnsize(os, ot, parent_obj, name, 0, tx)); | |
991 | } | |
992 | ||
993 | uint64_t | |
994 | zap_create_link_dnsize(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, | |
995 | const char *name, int dnodesize, dmu_tx_t *tx) | |
9ae529ec CS |
996 | { |
997 | uint64_t new_obj; | |
998 | ||
cae5b340 AX |
999 | VERIFY((new_obj = zap_create_dnsize(os, ot, DMU_OT_NONE, 0, |
1000 | dnodesize, tx)) > 0); | |
1001 | VERIFY0(zap_add(os, parent_obj, name, sizeof (uint64_t), 1, &new_obj, | |
1002 | tx)); | |
9ae529ec CS |
1003 | |
1004 | return (new_obj); | |
1005 | } | |
1006 | ||
34dc7c2f BB |
1007 | int |
1008 | zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, | |
1009 | char *name) | |
1010 | { | |
1011 | zap_cursor_t zc; | |
1012 | zap_attribute_t *za; | |
1013 | int err; | |
1014 | ||
1015 | if (mask == 0) | |
1016 | mask = -1ULL; | |
1017 | ||
ea04106b | 1018 | za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); |
34dc7c2f BB |
1019 | for (zap_cursor_init(&zc, os, zapobj); |
1020 | (err = zap_cursor_retrieve(&zc, za)) == 0; | |
1021 | zap_cursor_advance(&zc)) { | |
1022 | if ((za->za_first_integer & mask) == (value & mask)) { | |
1023 | (void) strcpy(name, za->za_name); | |
1024 | break; | |
1025 | } | |
1026 | } | |
1027 | zap_cursor_fini(&zc); | |
1028 | kmem_free(za, sizeof (zap_attribute_t)); | |
1029 | return (err); | |
1030 | } | |
1031 | ||
b128c09f BB |
1032 | int |
1033 | zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) | |
1034 | { | |
1035 | zap_cursor_t zc; | |
1036 | zap_attribute_t za; | |
1037 | int err; | |
1038 | ||
a08ee875 | 1039 | err = 0; |
b128c09f BB |
1040 | for (zap_cursor_init(&zc, os, fromobj); |
1041 | zap_cursor_retrieve(&zc, &za) == 0; | |
1042 | (void) zap_cursor_advance(&zc)) { | |
a08ee875 LG |
1043 | if (za.za_integer_length != 8 || za.za_num_integers != 1) { |
1044 | err = SET_ERROR(EINVAL); | |
1045 | break; | |
1046 | } | |
b128c09f BB |
1047 | err = zap_add(os, intoobj, za.za_name, |
1048 | 8, 1, &za.za_first_integer, tx); | |
1049 | if (err) | |
a08ee875 | 1050 | break; |
b128c09f BB |
1051 | } |
1052 | zap_cursor_fini(&zc); | |
a08ee875 | 1053 | return (err); |
b128c09f BB |
1054 | } |
1055 | ||
428870ff BB |
1056 | int |
1057 | zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj, | |
1058 | uint64_t value, dmu_tx_t *tx) | |
1059 | { | |
1060 | zap_cursor_t zc; | |
1061 | zap_attribute_t za; | |
1062 | int err; | |
1063 | ||
a08ee875 | 1064 | err = 0; |
428870ff BB |
1065 | for (zap_cursor_init(&zc, os, fromobj); |
1066 | zap_cursor_retrieve(&zc, &za) == 0; | |
1067 | (void) zap_cursor_advance(&zc)) { | |
a08ee875 LG |
1068 | if (za.za_integer_length != 8 || za.za_num_integers != 1) { |
1069 | err = SET_ERROR(EINVAL); | |
1070 | break; | |
1071 | } | |
428870ff BB |
1072 | err = zap_add(os, intoobj, za.za_name, |
1073 | 8, 1, &value, tx); | |
1074 | if (err) | |
a08ee875 | 1075 | break; |
428870ff BB |
1076 | } |
1077 | zap_cursor_fini(&zc); | |
a08ee875 | 1078 | return (err); |
428870ff BB |
1079 | } |
1080 | ||
1081 | int | |
1082 | zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj, | |
1083 | dmu_tx_t *tx) | |
1084 | { | |
1085 | zap_cursor_t zc; | |
1086 | zap_attribute_t za; | |
1087 | int err; | |
1088 | ||
a08ee875 | 1089 | err = 0; |
428870ff BB |
1090 | for (zap_cursor_init(&zc, os, fromobj); |
1091 | zap_cursor_retrieve(&zc, &za) == 0; | |
1092 | (void) zap_cursor_advance(&zc)) { | |
1093 | uint64_t delta = 0; | |
1094 | ||
a08ee875 LG |
1095 | if (za.za_integer_length != 8 || za.za_num_integers != 1) { |
1096 | err = SET_ERROR(EINVAL); | |
1097 | break; | |
1098 | } | |
428870ff BB |
1099 | |
1100 | err = zap_lookup(os, intoobj, za.za_name, 8, 1, &delta); | |
1101 | if (err != 0 && err != ENOENT) | |
a08ee875 | 1102 | break; |
428870ff BB |
1103 | delta += za.za_first_integer; |
1104 | err = zap_update(os, intoobj, za.za_name, 8, 1, &delta, tx); | |
1105 | if (err) | |
a08ee875 | 1106 | break; |
428870ff BB |
1107 | } |
1108 | zap_cursor_fini(&zc); | |
a08ee875 | 1109 | return (err); |
428870ff BB |
1110 | } |
1111 | ||
b128c09f BB |
1112 | int |
1113 | zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) | |
1114 | { | |
1115 | char name[20]; | |
1116 | ||
1117 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); | |
1118 | return (zap_add(os, obj, name, 8, 1, &value, tx)); | |
1119 | } | |
1120 | ||
1121 | int | |
1122 | zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) | |
1123 | { | |
1124 | char name[20]; | |
1125 | ||
1126 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); | |
1127 | return (zap_remove(os, obj, name, tx)); | |
1128 | } | |
1129 | ||
1130 | int | |
1131 | zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value) | |
1132 | { | |
1133 | char name[20]; | |
1134 | ||
1135 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); | |
1136 | return (zap_lookup(os, obj, name, 8, 1, &value)); | |
1137 | } | |
34dc7c2f | 1138 | |
428870ff BB |
1139 | int |
1140 | zap_add_int_key(objset_t *os, uint64_t obj, | |
1141 | uint64_t key, uint64_t value, dmu_tx_t *tx) | |
1142 | { | |
1143 | char name[20]; | |
1144 | ||
1145 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); | |
1146 | return (zap_add(os, obj, name, 8, 1, &value, tx)); | |
1147 | } | |
1148 | ||
753c3839 MA |
1149 | int |
1150 | zap_update_int_key(objset_t *os, uint64_t obj, | |
1151 | uint64_t key, uint64_t value, dmu_tx_t *tx) | |
1152 | { | |
1153 | char name[20]; | |
1154 | ||
1155 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); | |
1156 | return (zap_update(os, obj, name, 8, 1, &value, tx)); | |
1157 | } | |
1158 | ||
428870ff BB |
1159 | int |
1160 | zap_lookup_int_key(objset_t *os, uint64_t obj, uint64_t key, uint64_t *valuep) | |
1161 | { | |
1162 | char name[20]; | |
1163 | ||
1164 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); | |
1165 | return (zap_lookup(os, obj, name, 8, 1, valuep)); | |
1166 | } | |
1167 | ||
1168 | int | |
1169 | zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta, | |
1170 | dmu_tx_t *tx) | |
1171 | { | |
1172 | uint64_t value = 0; | |
1173 | int err; | |
1174 | ||
1175 | if (delta == 0) | |
1176 | return (0); | |
1177 | ||
1178 | err = zap_lookup(os, obj, name, 8, 1, &value); | |
1179 | if (err != 0 && err != ENOENT) | |
1180 | return (err); | |
1181 | value += delta; | |
1182 | if (value == 0) | |
1183 | err = zap_remove(os, obj, name, tx); | |
1184 | else | |
1185 | err = zap_update(os, obj, name, 8, 1, &value, tx); | |
1186 | return (err); | |
1187 | } | |
1188 | ||
1189 | int | |
1190 | zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta, | |
1191 | dmu_tx_t *tx) | |
1192 | { | |
1193 | char name[20]; | |
1194 | ||
1195 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); | |
1196 | return (zap_increment(os, obj, name, delta, tx)); | |
1197 | } | |
1198 | ||
34dc7c2f BB |
1199 | /* |
1200 | * Routines for iterating over the attributes. | |
1201 | */ | |
1202 | ||
1203 | int | |
1204 | fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) | |
1205 | { | |
1206 | int err = ENOENT; | |
1207 | zap_entry_handle_t zeh; | |
1208 | zap_leaf_t *l; | |
1209 | ||
1210 | /* retrieve the next entry at or after zc_hash/zc_cd */ | |
1211 | /* if no entry, return ENOENT */ | |
1212 | ||
1213 | if (zc->zc_leaf && | |
1214 | (ZAP_HASH_IDX(zc->zc_hash, | |
e10b0808 AX |
1215 | zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix_len) != |
1216 | zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix)) { | |
34dc7c2f BB |
1217 | rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); |
1218 | zap_put_leaf(zc->zc_leaf); | |
1219 | zc->zc_leaf = NULL; | |
1220 | } | |
1221 | ||
1222 | again: | |
1223 | if (zc->zc_leaf == NULL) { | |
1224 | err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, | |
1225 | &zc->zc_leaf); | |
1226 | if (err != 0) | |
1227 | return (err); | |
1228 | } else { | |
1229 | rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); | |
1230 | } | |
1231 | l = zc->zc_leaf; | |
1232 | ||
1233 | err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); | |
1234 | ||
1235 | if (err == ENOENT) { | |
cae5b340 | 1236 | if (zap_leaf_phys(l)->l_hdr.lh_prefix_len == 0) { |
34dc7c2f | 1237 | zc->zc_hash = -1ULL; |
cae5b340 | 1238 | zc->zc_cd = 0; |
34dc7c2f | 1239 | } else { |
cae5b340 AX |
1240 | uint64_t nocare = (1ULL << |
1241 | (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len)) - 1; | |
1242 | ||
1243 | zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; | |
1244 | zc->zc_cd = 0; | |
1245 | ||
1246 | if (zc->zc_hash == 0) { | |
1247 | zc->zc_hash = -1ULL; | |
1248 | } else { | |
1249 | zap_put_leaf(zc->zc_leaf); | |
1250 | zc->zc_leaf = NULL; | |
1251 | goto again; | |
1252 | } | |
34dc7c2f BB |
1253 | } |
1254 | } | |
1255 | ||
1256 | if (err == 0) { | |
1257 | zc->zc_hash = zeh.zeh_hash; | |
1258 | zc->zc_cd = zeh.zeh_cd; | |
1259 | za->za_integer_length = zeh.zeh_integer_size; | |
1260 | za->za_num_integers = zeh.zeh_num_integers; | |
1261 | if (zeh.zeh_num_integers == 0) { | |
1262 | za->za_first_integer = 0; | |
1263 | } else { | |
1264 | err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); | |
1265 | ASSERT(err == 0 || err == EOVERFLOW); | |
1266 | } | |
428870ff | 1267 | err = zap_entry_read_name(zap, &zeh, |
34dc7c2f BB |
1268 | sizeof (za->za_name), za->za_name); |
1269 | ASSERT(err == 0); | |
1270 | ||
1271 | za->za_normalization_conflict = | |
1272 | zap_entry_normalization_conflict(&zeh, | |
1273 | NULL, za->za_name, zap); | |
1274 | } | |
1275 | rw_exit(&zc->zc_leaf->l_rwlock); | |
1276 | return (err); | |
1277 | } | |
1278 | ||
34dc7c2f BB |
1279 | static void |
1280 | zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) | |
1281 | { | |
1282 | int i, err; | |
1283 | uint64_t lastblk = 0; | |
1284 | ||
1285 | /* | |
1286 | * NB: if a leaf has more pointers than an entire ptrtbl block | |
1287 | * can hold, then it'll be accounted for more than once, since | |
1288 | * we won't have lastblk. | |
1289 | */ | |
1290 | for (i = 0; i < len; i++) { | |
1291 | zap_leaf_t *l; | |
1292 | ||
1293 | if (tbl[i] == lastblk) | |
1294 | continue; | |
1295 | lastblk = tbl[i]; | |
1296 | ||
1297 | err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); | |
1298 | if (err == 0) { | |
1299 | zap_leaf_stats(zap, l, zs); | |
1300 | zap_put_leaf(l); | |
1301 | } | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | void | |
1306 | fzap_get_stats(zap_t *zap, zap_stats_t *zs) | |
1307 | { | |
1308 | int bs = FZAP_BLOCK_SHIFT(zap); | |
1309 | zs->zs_blocksize = 1ULL << bs; | |
1310 | ||
1311 | /* | |
1312 | * Set zap_phys_t fields | |
1313 | */ | |
e10b0808 AX |
1314 | zs->zs_num_leafs = zap_f_phys(zap)->zap_num_leafs; |
1315 | zs->zs_num_entries = zap_f_phys(zap)->zap_num_entries; | |
1316 | zs->zs_num_blocks = zap_f_phys(zap)->zap_freeblk; | |
1317 | zs->zs_block_type = zap_f_phys(zap)->zap_block_type; | |
1318 | zs->zs_magic = zap_f_phys(zap)->zap_magic; | |
1319 | zs->zs_salt = zap_f_phys(zap)->zap_salt; | |
34dc7c2f BB |
1320 | |
1321 | /* | |
1322 | * Set zap_ptrtbl fields | |
1323 | */ | |
e10b0808 AX |
1324 | zs->zs_ptrtbl_len = 1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift; |
1325 | zs->zs_ptrtbl_nextblk = zap_f_phys(zap)->zap_ptrtbl.zt_nextblk; | |
34dc7c2f | 1326 | zs->zs_ptrtbl_blks_copied = |
e10b0808 AX |
1327 | zap_f_phys(zap)->zap_ptrtbl.zt_blks_copied; |
1328 | zs->zs_ptrtbl_zt_blk = zap_f_phys(zap)->zap_ptrtbl.zt_blk; | |
1329 | zs->zs_ptrtbl_zt_numblks = zap_f_phys(zap)->zap_ptrtbl.zt_numblks; | |
1330 | zs->zs_ptrtbl_zt_shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; | |
34dc7c2f | 1331 | |
e10b0808 | 1332 | if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { |
34dc7c2f BB |
1333 | /* the ptrtbl is entirely in the header block. */ |
1334 | zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), | |
1335 | 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); | |
1336 | } else { | |
1337 | int b; | |
1338 | ||
cae5b340 | 1339 | dmu_prefetch(zap->zap_objset, zap->zap_object, 0, |
e10b0808 | 1340 | zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs, |
cae5b340 AX |
1341 | zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs, |
1342 | ZIO_PRIORITY_SYNC_READ); | |
34dc7c2f | 1343 | |
e10b0808 | 1344 | for (b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks; |
34dc7c2f BB |
1345 | b++) { |
1346 | dmu_buf_t *db; | |
1347 | int err; | |
1348 | ||
1349 | err = dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
e10b0808 | 1350 | (zap_f_phys(zap)->zap_ptrtbl.zt_blk + b) << bs, |
428870ff | 1351 | FTAG, &db, DMU_READ_NO_PREFETCH); |
34dc7c2f BB |
1352 | if (err == 0) { |
1353 | zap_stats_ptrtbl(zap, db->db_data, | |
1354 | 1<<(bs-3), zs); | |
1355 | dmu_buf_rele(db, FTAG); | |
1356 | } | |
1357 | } | |
1358 | } | |
1359 | } |