]>
Commit | Line | Data |
---|---|---|
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. |
8bea9815 | 23 | * Copyright (c) 2012, 2016 by Delphix. All rights reserved. |
0c66c32d | 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 | ||
d683ddbb JG |
54 | extern inline zap_phys_t *zap_f_phys(zap_t *zap); |
55 | ||
34dc7c2f BB |
56 | static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks); |
57 | ||
34dc7c2f BB |
58 | void |
59 | fzap_byteswap(void *vbuf, size_t size) | |
60 | { | |
d2a12f9e | 61 | uint64_t block_type = *(uint64_t *)vbuf; |
34dc7c2f BB |
62 | |
63 | if (block_type == ZBT_LEAF || block_type == BSWAP_64(ZBT_LEAF)) | |
64 | zap_leaf_byteswap(vbuf, size); | |
65 | else { | |
66 | /* it's a ptrtbl block */ | |
67 | byteswap_uint64_array(vbuf, size); | |
68 | } | |
69 | } | |
70 | ||
71 | void | |
428870ff | 72 | fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags) |
34dc7c2f | 73 | { |
34dc7c2f BB |
74 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); |
75 | zap->zap_ismicro = FALSE; | |
76 | ||
39efbde7 GM |
77 | zap->zap_dbu.dbu_evict_func_sync = zap_evict_sync; |
78 | zap->zap_dbu.dbu_evict_func_async = NULL; | |
34dc7c2f | 79 | |
c17486b2 | 80 | mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, MUTEX_DEFAULT, 0); |
9bd274dd | 81 | zap->zap_f.zap_block_shift = highbit64(zap->zap_dbuf->db_size) - 1; |
34dc7c2f | 82 | |
d2a12f9e | 83 | zap_phys_t *zp = zap_f_phys(zap); |
34dc7c2f BB |
84 | /* |
85 | * explicitly zero it since it might be coming from an | |
86 | * initialized microzap | |
87 | */ | |
88 | bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size); | |
89 | zp->zap_block_type = ZBT_HEADER; | |
90 | zp->zap_magic = ZAP_MAGIC; | |
91 | ||
92 | zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap); | |
93 | ||
94 | zp->zap_freeblk = 2; /* block 1 will be the first leaf */ | |
95 | zp->zap_num_leafs = 1; | |
96 | zp->zap_num_entries = 0; | |
97 | zp->zap_salt = zap->zap_salt; | |
98 | zp->zap_normflags = zap->zap_normflags; | |
428870ff | 99 | zp->zap_flags = flags; |
34dc7c2f BB |
100 | |
101 | /* block 1 will be the first leaf */ | |
d2a12f9e | 102 | for (int i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) |
34dc7c2f BB |
103 | ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1; |
104 | ||
105 | /* | |
106 | * set up block 1 - the first leaf | |
107 | */ | |
d2a12f9e MA |
108 | dmu_buf_t *db; |
109 | VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff | 110 | 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH)); |
34dc7c2f BB |
111 | dmu_buf_will_dirty(db, tx); |
112 | ||
d2a12f9e | 113 | zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); |
34dc7c2f | 114 | l->l_dbuf = db; |
34dc7c2f BB |
115 | |
116 | zap_leaf_init(l, zp->zap_normflags != 0); | |
117 | ||
118 | kmem_free(l, sizeof (zap_leaf_t)); | |
119 | dmu_buf_rele(db, FTAG); | |
120 | } | |
121 | ||
122 | static int | |
123 | zap_tryupgradedir(zap_t *zap, dmu_tx_t *tx) | |
124 | { | |
125 | if (RW_WRITE_HELD(&zap->zap_rwlock)) | |
126 | return (1); | |
127 | if (rw_tryupgrade(&zap->zap_rwlock)) { | |
128 | dmu_buf_will_dirty(zap->zap_dbuf, tx); | |
129 | return (1); | |
130 | } | |
131 | return (0); | |
132 | } | |
133 | ||
134 | /* | |
135 | * Generic routines for dealing with the pointer & cookie tables. | |
136 | */ | |
137 | ||
138 | static int | |
139 | zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, | |
140 | void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n), | |
141 | dmu_tx_t *tx) | |
142 | { | |
d2a12f9e | 143 | uint64_t newblk; |
34dc7c2f BB |
144 | int bs = FZAP_BLOCK_SHIFT(zap); |
145 | int hepb = 1<<(bs-4); | |
146 | /* hepb = half the number of entries in a block */ | |
147 | ||
148 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
149 | ASSERT(tbl->zt_blk != 0); | |
150 | ASSERT(tbl->zt_numblks > 0); | |
151 | ||
152 | if (tbl->zt_nextblk != 0) { | |
153 | newblk = tbl->zt_nextblk; | |
154 | } else { | |
155 | newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2); | |
156 | tbl->zt_nextblk = newblk; | |
c99c9001 | 157 | ASSERT0(tbl->zt_blks_copied); |
fcff0f35 PD |
158 | dmu_prefetch(zap->zap_objset, zap->zap_object, 0, |
159 | tbl->zt_blk << bs, tbl->zt_numblks << bs, | |
160 | ZIO_PRIORITY_SYNC_READ); | |
34dc7c2f BB |
161 | } |
162 | ||
163 | /* | |
164 | * Copy the ptrtbl from the old to new location. | |
165 | */ | |
166 | ||
d2a12f9e MA |
167 | uint64_t b = tbl->zt_blks_copied; |
168 | dmu_buf_t *db_old; | |
169 | int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff | 170 | (tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH); |
d2a12f9e | 171 | if (err != 0) |
34dc7c2f BB |
172 | return (err); |
173 | ||
174 | /* first half of entries in old[b] go to new[2*b+0] */ | |
d2a12f9e MA |
175 | dmu_buf_t *db_new; |
176 | VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff | 177 | (newblk + 2*b+0) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); |
34dc7c2f BB |
178 | dmu_buf_will_dirty(db_new, tx); |
179 | transfer_func(db_old->db_data, db_new->db_data, hepb); | |
180 | dmu_buf_rele(db_new, FTAG); | |
181 | ||
182 | /* second half of entries in old[b] go to new[2*b+1] */ | |
d2a12f9e | 183 | VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, |
428870ff | 184 | (newblk + 2*b+1) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH)); |
34dc7c2f BB |
185 | dmu_buf_will_dirty(db_new, tx); |
186 | transfer_func((uint64_t *)db_old->db_data + hepb, | |
187 | db_new->db_data, hepb); | |
188 | dmu_buf_rele(db_new, FTAG); | |
189 | ||
190 | dmu_buf_rele(db_old, FTAG); | |
191 | ||
192 | tbl->zt_blks_copied++; | |
193 | ||
194 | dprintf("copied block %llu of %llu\n", | |
195 | tbl->zt_blks_copied, tbl->zt_numblks); | |
196 | ||
197 | if (tbl->zt_blks_copied == tbl->zt_numblks) { | |
198 | (void) dmu_free_range(zap->zap_objset, zap->zap_object, | |
199 | tbl->zt_blk << bs, tbl->zt_numblks << bs, tx); | |
200 | ||
201 | tbl->zt_blk = newblk; | |
202 | tbl->zt_numblks *= 2; | |
203 | tbl->zt_shift++; | |
204 | tbl->zt_nextblk = 0; | |
205 | tbl->zt_blks_copied = 0; | |
206 | ||
29e57d15 | 207 | dprintf("finished; numblocks now %llu (%uk entries)\n", |
34dc7c2f BB |
208 | tbl->zt_numblks, 1<<(tbl->zt_shift-10)); |
209 | } | |
210 | ||
211 | return (0); | |
212 | } | |
213 | ||
214 | static int | |
215 | zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, | |
216 | dmu_tx_t *tx) | |
217 | { | |
34dc7c2f | 218 | int bs = FZAP_BLOCK_SHIFT(zap); |
34dc7c2f BB |
219 | |
220 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
221 | ASSERT(tbl->zt_blk != 0); | |
222 | ||
223 | dprintf("storing %llx at index %llx\n", val, idx); | |
224 | ||
d2a12f9e MA |
225 | uint64_t blk = idx >> (bs-3); |
226 | uint64_t off = idx & ((1<<(bs-3))-1); | |
34dc7c2f | 227 | |
d2a12f9e MA |
228 | dmu_buf_t *db; |
229 | int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff | 230 | (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); |
d2a12f9e | 231 | if (err != 0) |
34dc7c2f BB |
232 | return (err); |
233 | dmu_buf_will_dirty(db, tx); | |
234 | ||
235 | if (tbl->zt_nextblk != 0) { | |
236 | uint64_t idx2 = idx * 2; | |
237 | uint64_t blk2 = idx2 >> (bs-3); | |
238 | uint64_t off2 = idx2 & ((1<<(bs-3))-1); | |
239 | dmu_buf_t *db2; | |
240 | ||
241 | err = dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff BB |
242 | (tbl->zt_nextblk + blk2) << bs, FTAG, &db2, |
243 | DMU_READ_NO_PREFETCH); | |
d2a12f9e | 244 | if (err != 0) { |
34dc7c2f BB |
245 | dmu_buf_rele(db, FTAG); |
246 | return (err); | |
247 | } | |
248 | dmu_buf_will_dirty(db2, tx); | |
249 | ((uint64_t *)db2->db_data)[off2] = val; | |
250 | ((uint64_t *)db2->db_data)[off2+1] = val; | |
251 | dmu_buf_rele(db2, FTAG); | |
252 | } | |
253 | ||
254 | ((uint64_t *)db->db_data)[off] = val; | |
255 | dmu_buf_rele(db, FTAG); | |
256 | ||
257 | return (0); | |
258 | } | |
259 | ||
260 | static int | |
261 | zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) | |
262 | { | |
34dc7c2f BB |
263 | int bs = FZAP_BLOCK_SHIFT(zap); |
264 | ||
265 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
266 | ||
d2a12f9e MA |
267 | uint64_t blk = idx >> (bs-3); |
268 | uint64_t off = idx & ((1<<(bs-3))-1); | |
34dc7c2f | 269 | |
2bce8049 MA |
270 | /* |
271 | * Note: this is equivalent to dmu_buf_hold(), but we use | |
272 | * _dnode_enter / _by_dnode because it's faster because we don't | |
273 | * have to hold the dnode. | |
274 | */ | |
d2a12f9e MA |
275 | dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf); |
276 | dmu_buf_t *db; | |
277 | int err = dmu_buf_hold_by_dnode(dn, | |
428870ff | 278 | (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); |
2bce8049 | 279 | dmu_buf_dnode_exit(zap->zap_dbuf); |
d2a12f9e | 280 | if (err != 0) |
34dc7c2f BB |
281 | return (err); |
282 | *valp = ((uint64_t *)db->db_data)[off]; | |
283 | dmu_buf_rele(db, FTAG); | |
284 | ||
285 | if (tbl->zt_nextblk != 0) { | |
286 | /* | |
287 | * read the nextblk for the sake of i/o error checking, | |
288 | * so that zap_table_load() will catch errors for | |
289 | * zap_table_store. | |
290 | */ | |
291 | blk = (idx*2) >> (bs-3); | |
292 | ||
2bce8049 MA |
293 | dn = dmu_buf_dnode_enter(zap->zap_dbuf); |
294 | err = dmu_buf_hold_by_dnode(dn, | |
428870ff BB |
295 | (tbl->zt_nextblk + blk) << bs, FTAG, &db, |
296 | DMU_READ_NO_PREFETCH); | |
2bce8049 | 297 | dmu_buf_dnode_exit(zap->zap_dbuf); |
3a84951d WA |
298 | if (err == 0) |
299 | dmu_buf_rele(db, FTAG); | |
34dc7c2f BB |
300 | } |
301 | return (err); | |
302 | } | |
303 | ||
304 | /* | |
305 | * Routines for growing the ptrtbl. | |
306 | */ | |
307 | ||
308 | static void | |
309 | zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n) | |
310 | { | |
d2a12f9e | 311 | for (int i = 0; i < n; i++) { |
34dc7c2f | 312 | uint64_t lb = src[i]; |
d2a12f9e MA |
313 | dst[2 * i + 0] = lb; |
314 | dst[2 * i + 1] = lb; | |
34dc7c2f BB |
315 | } |
316 | } | |
317 | ||
318 | static int | |
319 | zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) | |
320 | { | |
428870ff BB |
321 | /* |
322 | * The pointer table should never use more hash bits than we | |
323 | * have (otherwise we'd be using useless zero bits to index it). | |
324 | * If we are within 2 bits of running out, stop growing, since | |
325 | * this is already an aberrant condition. | |
326 | */ | |
d683ddbb | 327 | if (zap_f_phys(zap)->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2) |
2e528b49 | 328 | return (SET_ERROR(ENOSPC)); |
34dc7c2f | 329 | |
d683ddbb | 330 | if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { |
34dc7c2f BB |
331 | /* |
332 | * We are outgrowing the "embedded" ptrtbl (the one | |
333 | * stored in the header block). Give it its own entire | |
334 | * block, which will double the size of the ptrtbl. | |
335 | */ | |
d683ddbb | 336 | ASSERT3U(zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, |
34dc7c2f | 337 | ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); |
d683ddbb | 338 | ASSERT0(zap_f_phys(zap)->zap_ptrtbl.zt_blk); |
34dc7c2f | 339 | |
d2a12f9e MA |
340 | uint64_t newblk = zap_allocate_blocks(zap, 1); |
341 | dmu_buf_t *db_new; | |
342 | int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
428870ff BB |
343 | newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new, |
344 | DMU_READ_NO_PREFETCH); | |
d2a12f9e | 345 | if (err != 0) |
34dc7c2f BB |
346 | return (err); |
347 | dmu_buf_will_dirty(db_new, tx); | |
348 | zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), | |
349 | db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); | |
350 | dmu_buf_rele(db_new, FTAG); | |
351 | ||
d683ddbb JG |
352 | zap_f_phys(zap)->zap_ptrtbl.zt_blk = newblk; |
353 | zap_f_phys(zap)->zap_ptrtbl.zt_numblks = 1; | |
354 | zap_f_phys(zap)->zap_ptrtbl.zt_shift++; | |
34dc7c2f | 355 | |
d683ddbb JG |
356 | ASSERT3U(1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, |
357 | zap_f_phys(zap)->zap_ptrtbl.zt_numblks << | |
34dc7c2f BB |
358 | (FZAP_BLOCK_SHIFT(zap)-3)); |
359 | ||
360 | return (0); | |
361 | } else { | |
d683ddbb | 362 | return (zap_table_grow(zap, &zap_f_phys(zap)->zap_ptrtbl, |
34dc7c2f BB |
363 | zap_ptrtbl_transfer, tx)); |
364 | } | |
365 | } | |
366 | ||
367 | static void | |
368 | zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) | |
369 | { | |
370 | dmu_buf_will_dirty(zap->zap_dbuf, tx); | |
371 | mutex_enter(&zap->zap_f.zap_num_entries_mtx); | |
d683ddbb JG |
372 | ASSERT(delta > 0 || zap_f_phys(zap)->zap_num_entries >= -delta); |
373 | zap_f_phys(zap)->zap_num_entries += delta; | |
34dc7c2f BB |
374 | mutex_exit(&zap->zap_f.zap_num_entries_mtx); |
375 | } | |
376 | ||
377 | static uint64_t | |
378 | zap_allocate_blocks(zap_t *zap, int nblocks) | |
379 | { | |
34dc7c2f | 380 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); |
d2a12f9e | 381 | uint64_t newblk = zap_f_phys(zap)->zap_freeblk; |
d683ddbb | 382 | zap_f_phys(zap)->zap_freeblk += nblocks; |
34dc7c2f BB |
383 | return (newblk); |
384 | } | |
385 | ||
0c66c32d | 386 | static void |
39efbde7 | 387 | zap_leaf_evict_sync(void *dbu) |
0c66c32d JG |
388 | { |
389 | zap_leaf_t *l = dbu; | |
390 | ||
391 | rw_destroy(&l->l_rwlock); | |
392 | kmem_free(l, sizeof (zap_leaf_t)); | |
393 | } | |
394 | ||
34dc7c2f BB |
395 | static zap_leaf_t * |
396 | zap_create_leaf(zap_t *zap, dmu_tx_t *tx) | |
397 | { | |
0c66c32d | 398 | zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); |
34dc7c2f BB |
399 | |
400 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
401 | ||
448d7aaa | 402 | rw_init(&l->l_rwlock, NULL, RW_NOLOCKDEP, NULL); |
34dc7c2f BB |
403 | rw_enter(&l->l_rwlock, RW_WRITER); |
404 | l->l_blkid = zap_allocate_blocks(zap, 1); | |
405 | l->l_dbuf = NULL; | |
34dc7c2f | 406 | |
d2a12f9e | 407 | VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, |
428870ff BB |
408 | l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf, |
409 | DMU_READ_NO_PREFETCH)); | |
39efbde7 | 410 | dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); |
d2a12f9e | 411 | VERIFY3P(NULL, ==, dmu_buf_set_user(l->l_dbuf, &l->l_dbu)); |
34dc7c2f BB |
412 | dmu_buf_will_dirty(l->l_dbuf, tx); |
413 | ||
414 | zap_leaf_init(l, zap->zap_normflags != 0); | |
415 | ||
d683ddbb | 416 | zap_f_phys(zap)->zap_num_leafs++; |
34dc7c2f BB |
417 | |
418 | return (l); | |
419 | } | |
420 | ||
421 | int | |
422 | fzap_count(zap_t *zap, uint64_t *count) | |
423 | { | |
424 | ASSERT(!zap->zap_ismicro); | |
425 | mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */ | |
d683ddbb | 426 | *count = zap_f_phys(zap)->zap_num_entries; |
34dc7c2f BB |
427 | mutex_exit(&zap->zap_f.zap_num_entries_mtx); |
428 | return (0); | |
429 | } | |
430 | ||
431 | /* | |
432 | * Routines for obtaining zap_leaf_t's | |
433 | */ | |
434 | ||
435 | void | |
436 | zap_put_leaf(zap_leaf_t *l) | |
437 | { | |
438 | rw_exit(&l->l_rwlock); | |
439 | dmu_buf_rele(l->l_dbuf, NULL); | |
440 | } | |
441 | ||
34dc7c2f BB |
442 | static zap_leaf_t * |
443 | zap_open_leaf(uint64_t blkid, dmu_buf_t *db) | |
444 | { | |
34dc7c2f BB |
445 | ASSERT(blkid != 0); |
446 | ||
d2a12f9e | 447 | zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); |
ef5319df | 448 | rw_init(&l->l_rwlock, NULL, RW_DEFAULT, NULL); |
34dc7c2f BB |
449 | rw_enter(&l->l_rwlock, RW_WRITER); |
450 | l->l_blkid = blkid; | |
9bd274dd | 451 | l->l_bs = highbit64(db->db_size) - 1; |
34dc7c2f | 452 | l->l_dbuf = db; |
34dc7c2f | 453 | |
39efbde7 | 454 | dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); |
d2a12f9e | 455 | zap_leaf_t *winner = dmu_buf_set_user(db, &l->l_dbu); |
34dc7c2f BB |
456 | |
457 | rw_exit(&l->l_rwlock); | |
458 | if (winner != NULL) { | |
459 | /* someone else set it first */ | |
39efbde7 | 460 | zap_leaf_evict_sync(&l->l_dbu); |
34dc7c2f BB |
461 | l = winner; |
462 | } | |
463 | ||
464 | /* | |
465 | * lhr_pad was previously used for the next leaf in the leaf | |
466 | * chain. There should be no chained leafs (as we have removed | |
467 | * support for them). | |
468 | */ | |
d683ddbb | 469 | ASSERT0(zap_leaf_phys(l)->l_hdr.lh_pad1); |
34dc7c2f BB |
470 | |
471 | /* | |
472 | * There should be more hash entries than there can be | |
473 | * chunks to put in the hash table | |
474 | */ | |
475 | ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3); | |
476 | ||
477 | /* The chunks should begin at the end of the hash table */ | |
b8864a23 | 478 | ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, (zap_leaf_chunk_t *) |
d683ddbb | 479 | &zap_leaf_phys(l)->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]); |
34dc7c2f BB |
480 | |
481 | /* The chunks should end at the end of the block */ | |
482 | ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) - | |
d683ddbb | 483 | (uintptr_t)zap_leaf_phys(l), ==, l->l_dbuf->db_size); |
34dc7c2f BB |
484 | |
485 | return (l); | |
486 | } | |
487 | ||
488 | static int | |
489 | zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, | |
490 | zap_leaf_t **lp) | |
491 | { | |
492 | dmu_buf_t *db; | |
34dc7c2f BB |
493 | |
494 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
495 | ||
29572ccd CC |
496 | /* |
497 | * If system crashed just after dmu_free_long_range in zfs_rmnode, we | |
498 | * would be left with an empty xattr dir in delete queue. blkid=0 | |
499 | * would be passed in when doing zfs_purgedir. If that's the case we | |
500 | * should just return immediately. The underlying objects should | |
501 | * already be freed, so this should be perfectly fine. | |
502 | */ | |
503 | if (blkid == 0) | |
ecb2b7dc | 504 | return (SET_ERROR(ENOENT)); |
29572ccd | 505 | |
d2a12f9e | 506 | int bs = FZAP_BLOCK_SHIFT(zap); |
1c27024e | 507 | dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf); |
d2a12f9e | 508 | int err = dmu_buf_hold_by_dnode(dn, |
428870ff | 509 | blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH); |
2bce8049 | 510 | dmu_buf_dnode_exit(zap->zap_dbuf); |
d2a12f9e | 511 | if (err != 0) |
34dc7c2f BB |
512 | return (err); |
513 | ||
514 | ASSERT3U(db->db_object, ==, zap->zap_object); | |
515 | ASSERT3U(db->db_offset, ==, blkid << bs); | |
516 | ASSERT3U(db->db_size, ==, 1 << bs); | |
517 | ASSERT(blkid != 0); | |
518 | ||
d2a12f9e | 519 | zap_leaf_t *l = dmu_buf_get_user(db); |
34dc7c2f BB |
520 | |
521 | if (l == NULL) | |
522 | l = zap_open_leaf(blkid, db); | |
523 | ||
524 | rw_enter(&l->l_rwlock, lt); | |
525 | /* | |
d683ddbb | 526 | * Must lock before dirtying, otherwise zap_leaf_phys(l) could change, |
34dc7c2f BB |
527 | * causing ASSERT below to fail. |
528 | */ | |
529 | if (lt == RW_WRITER) | |
530 | dmu_buf_will_dirty(db, tx); | |
531 | ASSERT3U(l->l_blkid, ==, blkid); | |
532 | ASSERT3P(l->l_dbuf, ==, db); | |
d683ddbb JG |
533 | ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_block_type, ==, ZBT_LEAF); |
534 | ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); | |
34dc7c2f BB |
535 | |
536 | *lp = l; | |
537 | return (0); | |
538 | } | |
539 | ||
540 | static int | |
541 | zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp) | |
542 | { | |
543 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
544 | ||
d683ddbb | 545 | if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { |
34dc7c2f | 546 | ASSERT3U(idx, <, |
d683ddbb | 547 | (1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift)); |
34dc7c2f BB |
548 | *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx); |
549 | return (0); | |
550 | } else { | |
d683ddbb | 551 | return (zap_table_load(zap, &zap_f_phys(zap)->zap_ptrtbl, |
34dc7c2f BB |
552 | idx, valp)); |
553 | } | |
554 | } | |
555 | ||
556 | static int | |
557 | zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) | |
558 | { | |
559 | ASSERT(tx != NULL); | |
560 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
561 | ||
d683ddbb | 562 | if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) { |
34dc7c2f BB |
563 | ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk; |
564 | return (0); | |
565 | } else { | |
d683ddbb | 566 | return (zap_table_store(zap, &zap_f_phys(zap)->zap_ptrtbl, |
34dc7c2f BB |
567 | idx, blk, tx)); |
568 | } | |
569 | } | |
570 | ||
571 | static int | |
572 | zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) | |
573 | { | |
d2a12f9e | 574 | uint64_t blk; |
34dc7c2f BB |
575 | |
576 | ASSERT(zap->zap_dbuf == NULL || | |
d683ddbb | 577 | zap_f_phys(zap) == zap->zap_dbuf->db_data); |
32c8c946 CC |
578 | |
579 | /* Reality check for corrupt zap objects (leaf or header). */ | |
580 | if ((zap_f_phys(zap)->zap_block_type != ZBT_LEAF && | |
581 | zap_f_phys(zap)->zap_block_type != ZBT_HEADER) || | |
582 | zap_f_phys(zap)->zap_magic != ZAP_MAGIC) { | |
583 | return (SET_ERROR(EIO)); | |
584 | } | |
d2a12f9e MA |
585 | |
586 | uint64_t idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift); | |
587 | int err = zap_idx_to_blk(zap, idx, &blk); | |
34dc7c2f BB |
588 | if (err != 0) |
589 | return (err); | |
590 | err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); | |
591 | ||
d683ddbb JG |
592 | ASSERT(err || |
593 | ZAP_HASH_IDX(h, zap_leaf_phys(*lp)->l_hdr.lh_prefix_len) == | |
594 | zap_leaf_phys(*lp)->l_hdr.lh_prefix); | |
34dc7c2f BB |
595 | return (err); |
596 | } | |
597 | ||
598 | static int | |
8bea9815 MA |
599 | zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, |
600 | void *tag, dmu_tx_t *tx, zap_leaf_t **lp) | |
34dc7c2f BB |
601 | { |
602 | zap_t *zap = zn->zn_zap; | |
603 | uint64_t hash = zn->zn_hash; | |
d2a12f9e | 604 | int err; |
d683ddbb | 605 | int old_prefix_len = zap_leaf_phys(l)->l_hdr.lh_prefix_len; |
34dc7c2f | 606 | |
d683ddbb | 607 | ASSERT3U(old_prefix_len, <=, zap_f_phys(zap)->zap_ptrtbl.zt_shift); |
34dc7c2f BB |
608 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); |
609 | ||
610 | ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, | |
d683ddbb | 611 | zap_leaf_phys(l)->l_hdr.lh_prefix); |
34dc7c2f BB |
612 | |
613 | if (zap_tryupgradedir(zap, tx) == 0 || | |
d683ddbb | 614 | old_prefix_len == zap_f_phys(zap)->zap_ptrtbl.zt_shift) { |
34dc7c2f BB |
615 | /* We failed to upgrade, or need to grow the pointer table */ |
616 | objset_t *os = zap->zap_objset; | |
617 | uint64_t object = zap->zap_object; | |
618 | ||
619 | zap_put_leaf(l); | |
8bea9815 | 620 | zap_unlockdir(zap, tag); |
34dc7c2f | 621 | err = zap_lockdir(os, object, tx, RW_WRITER, |
8bea9815 | 622 | FALSE, FALSE, tag, &zn->zn_zap); |
34dc7c2f | 623 | zap = zn->zn_zap; |
d2a12f9e | 624 | if (err != 0) |
34dc7c2f BB |
625 | return (err); |
626 | ASSERT(!zap->zap_ismicro); | |
627 | ||
628 | while (old_prefix_len == | |
d683ddbb | 629 | zap_f_phys(zap)->zap_ptrtbl.zt_shift) { |
34dc7c2f | 630 | err = zap_grow_ptrtbl(zap, tx); |
d2a12f9e | 631 | if (err != 0) |
34dc7c2f BB |
632 | return (err); |
633 | } | |
634 | ||
635 | err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); | |
d2a12f9e | 636 | if (err != 0) |
34dc7c2f BB |
637 | return (err); |
638 | ||
d683ddbb | 639 | if (zap_leaf_phys(l)->l_hdr.lh_prefix_len != old_prefix_len) { |
34dc7c2f BB |
640 | /* it split while our locks were down */ |
641 | *lp = l; | |
642 | return (0); | |
643 | } | |
644 | } | |
645 | ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); | |
d683ddbb | 646 | ASSERT3U(old_prefix_len, <, zap_f_phys(zap)->zap_ptrtbl.zt_shift); |
34dc7c2f | 647 | ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, |
d683ddbb | 648 | zap_leaf_phys(l)->l_hdr.lh_prefix); |
34dc7c2f | 649 | |
d2a12f9e | 650 | int prefix_diff = zap_f_phys(zap)->zap_ptrtbl.zt_shift - |
34dc7c2f | 651 | (old_prefix_len + 1); |
d2a12f9e MA |
652 | uint64_t sibling = |
653 | (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; | |
34dc7c2f BB |
654 | |
655 | /* check for i/o errors before doing zap_leaf_split */ | |
d2a12f9e | 656 | for (int i = 0; i < (1ULL << prefix_diff); i++) { |
34dc7c2f | 657 | uint64_t blk; |
d2a12f9e MA |
658 | err = zap_idx_to_blk(zap, sibling + i, &blk); |
659 | if (err != 0) | |
34dc7c2f BB |
660 | return (err); |
661 | ASSERT3U(blk, ==, l->l_blkid); | |
662 | } | |
663 | ||
d2a12f9e | 664 | zap_leaf_t *nl = zap_create_leaf(zap, tx); |
34dc7c2f BB |
665 | zap_leaf_split(l, nl, zap->zap_normflags != 0); |
666 | ||
667 | /* set sibling pointers */ | |
d2a12f9e MA |
668 | for (int i = 0; i < (1ULL << prefix_diff); i++) { |
669 | err = zap_set_idx_to_blk(zap, sibling + i, nl->l_blkid, tx); | |
c99c9001 | 670 | ASSERT0(err); /* we checked for i/o errors above */ |
34dc7c2f BB |
671 | } |
672 | ||
6ca636a1 GN |
673 | ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_prefix_len, >, 0); |
674 | ||
d683ddbb | 675 | if (hash & (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len))) { |
34dc7c2f BB |
676 | /* we want the sibling */ |
677 | zap_put_leaf(l); | |
678 | *lp = nl; | |
679 | } else { | |
680 | zap_put_leaf(nl); | |
681 | *lp = l; | |
682 | } | |
683 | ||
684 | return (0); | |
685 | } | |
686 | ||
687 | static void | |
8bea9815 MA |
688 | zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, |
689 | void *tag, dmu_tx_t *tx) | |
34dc7c2f BB |
690 | { |
691 | zap_t *zap = zn->zn_zap; | |
d683ddbb JG |
692 | int shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; |
693 | int leaffull = (zap_leaf_phys(l)->l_hdr.lh_prefix_len == shift && | |
694 | zap_leaf_phys(l)->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER); | |
34dc7c2f BB |
695 | |
696 | zap_put_leaf(l); | |
697 | ||
d683ddbb | 698 | if (leaffull || zap_f_phys(zap)->zap_ptrtbl.zt_nextblk) { |
34dc7c2f BB |
699 | /* |
700 | * We are in the middle of growing the pointer table, or | |
701 | * this leaf will soon make us grow it. | |
702 | */ | |
703 | if (zap_tryupgradedir(zap, tx) == 0) { | |
704 | objset_t *os = zap->zap_objset; | |
705 | uint64_t zapobj = zap->zap_object; | |
706 | ||
8bea9815 | 707 | zap_unlockdir(zap, tag); |
d2a12f9e | 708 | int err = zap_lockdir(os, zapobj, tx, |
8bea9815 | 709 | RW_WRITER, FALSE, FALSE, tag, &zn->zn_zap); |
34dc7c2f | 710 | zap = zn->zn_zap; |
d2a12f9e | 711 | if (err != 0) |
34dc7c2f BB |
712 | return; |
713 | } | |
714 | ||
715 | /* could have finished growing while our locks were down */ | |
d683ddbb | 716 | if (zap_f_phys(zap)->zap_ptrtbl.zt_shift == shift) |
34dc7c2f BB |
717 | (void) zap_grow_ptrtbl(zap, tx); |
718 | } | |
719 | } | |
720 | ||
34dc7c2f | 721 | static int |
428870ff | 722 | fzap_checkname(zap_name_t *zn) |
34dc7c2f | 723 | { |
428870ff | 724 | if (zn->zn_key_orig_numints * zn->zn_key_intlen > ZAP_MAXNAMELEN) |
2e528b49 | 725 | return (SET_ERROR(ENAMETOOLONG)); |
428870ff BB |
726 | return (0); |
727 | } | |
34dc7c2f | 728 | |
428870ff BB |
729 | static int |
730 | fzap_checksize(uint64_t integer_size, uint64_t num_integers) | |
731 | { | |
34dc7c2f BB |
732 | /* Only integer sizes supported by C */ |
733 | switch (integer_size) { | |
734 | case 1: | |
735 | case 2: | |
736 | case 4: | |
737 | case 8: | |
738 | break; | |
739 | default: | |
2e528b49 | 740 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
741 | } |
742 | ||
743 | if (integer_size * num_integers > ZAP_MAXVALUELEN) | |
ecb2b7dc | 744 | return (SET_ERROR(E2BIG)); |
34dc7c2f BB |
745 | |
746 | return (0); | |
747 | } | |
748 | ||
428870ff BB |
749 | static int |
750 | fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) | |
751 | { | |
d2a12f9e MA |
752 | int err = fzap_checkname(zn); |
753 | if (err != 0) | |
428870ff BB |
754 | return (err); |
755 | return (fzap_checksize(integer_size, num_integers)); | |
756 | } | |
757 | ||
34dc7c2f BB |
758 | /* |
759 | * Routines for manipulating attributes. | |
760 | */ | |
761 | int | |
762 | fzap_lookup(zap_name_t *zn, | |
763 | uint64_t integer_size, uint64_t num_integers, void *buf, | |
764 | char *realname, int rn_len, boolean_t *ncp) | |
765 | { | |
766 | zap_leaf_t *l; | |
34dc7c2f BB |
767 | zap_entry_handle_t zeh; |
768 | ||
d2a12f9e MA |
769 | int err = fzap_checkname(zn); |
770 | if (err != 0) | |
34dc7c2f BB |
771 | return (err); |
772 | ||
773 | err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); | |
774 | if (err != 0) | |
775 | return (err); | |
776 | err = zap_leaf_lookup(l, zn, &zeh); | |
777 | if (err == 0) { | |
428870ff BB |
778 | if ((err = fzap_checksize(integer_size, num_integers)) != 0) { |
779 | zap_put_leaf(l); | |
780 | return (err); | |
781 | } | |
782 | ||
34dc7c2f | 783 | err = zap_entry_read(&zeh, integer_size, num_integers, buf); |
428870ff | 784 | (void) zap_entry_read_name(zn->zn_zap, &zeh, rn_len, realname); |
34dc7c2f BB |
785 | if (ncp) { |
786 | *ncp = zap_entry_normalization_conflict(&zeh, | |
787 | zn, NULL, zn->zn_zap); | |
788 | } | |
789 | } | |
790 | ||
791 | zap_put_leaf(l); | |
792 | return (err); | |
793 | } | |
794 | ||
795 | int | |
796 | fzap_add_cd(zap_name_t *zn, | |
797 | uint64_t integer_size, uint64_t num_integers, | |
8bea9815 | 798 | const void *val, uint32_t cd, void *tag, dmu_tx_t *tx) |
34dc7c2f BB |
799 | { |
800 | zap_leaf_t *l; | |
801 | int err; | |
802 | zap_entry_handle_t zeh; | |
803 | zap_t *zap = zn->zn_zap; | |
804 | ||
805 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
806 | ASSERT(!zap->zap_ismicro); | |
428870ff | 807 | ASSERT(fzap_check(zn, integer_size, num_integers) == 0); |
34dc7c2f BB |
808 | |
809 | err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); | |
810 | if (err != 0) | |
811 | return (err); | |
812 | retry: | |
813 | err = zap_leaf_lookup(l, zn, &zeh); | |
814 | if (err == 0) { | |
2e528b49 | 815 | err = SET_ERROR(EEXIST); |
34dc7c2f BB |
816 | goto out; |
817 | } | |
818 | if (err != ENOENT) | |
819 | goto out; | |
820 | ||
428870ff | 821 | err = zap_entry_create(l, zn, cd, |
34dc7c2f BB |
822 | integer_size, num_integers, val, &zeh); |
823 | ||
824 | if (err == 0) { | |
825 | zap_increment_num_entries(zap, 1, tx); | |
826 | } else if (err == EAGAIN) { | |
8bea9815 | 827 | err = zap_expand_leaf(zn, l, tag, tx, &l); |
34dc7c2f | 828 | zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ |
599b8648 | 829 | if (err == 0) { |
34dc7c2f | 830 | goto retry; |
599b8648 CC |
831 | } else if (err == ENOSPC) { |
832 | /* | |
833 | * If we failed to expand the leaf, then bailout | |
834 | * as there is no point trying | |
835 | * zap_put_leaf_maybe_grow_ptrtbl(). | |
836 | */ | |
837 | return (err); | |
838 | } | |
34dc7c2f BB |
839 | } |
840 | ||
841 | out: | |
842 | if (zap != NULL) | |
8bea9815 | 843 | zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); |
34dc7c2f BB |
844 | return (err); |
845 | } | |
846 | ||
847 | int | |
848 | fzap_add(zap_name_t *zn, | |
849 | uint64_t integer_size, uint64_t num_integers, | |
8bea9815 | 850 | const void *val, void *tag, dmu_tx_t *tx) |
34dc7c2f | 851 | { |
428870ff | 852 | int err = fzap_check(zn, integer_size, num_integers); |
34dc7c2f BB |
853 | if (err != 0) |
854 | return (err); | |
855 | ||
856 | return (fzap_add_cd(zn, integer_size, num_integers, | |
8bea9815 | 857 | val, ZAP_NEED_CD, tag, tx)); |
34dc7c2f BB |
858 | } |
859 | ||
860 | int | |
861 | fzap_update(zap_name_t *zn, | |
8bea9815 MA |
862 | int integer_size, uint64_t num_integers, const void *val, |
863 | void *tag, dmu_tx_t *tx) | |
34dc7c2f BB |
864 | { |
865 | zap_leaf_t *l; | |
d2a12f9e MA |
866 | int err; |
867 | boolean_t create; | |
34dc7c2f BB |
868 | zap_entry_handle_t zeh; |
869 | zap_t *zap = zn->zn_zap; | |
870 | ||
871 | ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); | |
428870ff | 872 | err = fzap_check(zn, integer_size, num_integers); |
34dc7c2f BB |
873 | if (err != 0) |
874 | return (err); | |
875 | ||
876 | err = zap_deref_leaf(zap, zn->zn_hash, tx, RW_WRITER, &l); | |
877 | if (err != 0) | |
878 | return (err); | |
879 | retry: | |
880 | err = zap_leaf_lookup(l, zn, &zeh); | |
881 | create = (err == ENOENT); | |
882 | ASSERT(err == 0 || err == ENOENT); | |
883 | ||
884 | if (create) { | |
428870ff BB |
885 | err = zap_entry_create(l, zn, ZAP_NEED_CD, |
886 | integer_size, num_integers, val, &zeh); | |
34dc7c2f BB |
887 | if (err == 0) |
888 | zap_increment_num_entries(zap, 1, tx); | |
889 | } else { | |
890 | err = zap_entry_update(&zeh, integer_size, num_integers, val); | |
891 | } | |
892 | ||
893 | if (err == EAGAIN) { | |
8bea9815 | 894 | err = zap_expand_leaf(zn, l, tag, tx, &l); |
34dc7c2f BB |
895 | zap = zn->zn_zap; /* zap_expand_leaf() may change zap */ |
896 | if (err == 0) | |
897 | goto retry; | |
898 | } | |
899 | ||
900 | if (zap != NULL) | |
8bea9815 | 901 | zap_put_leaf_maybe_grow_ptrtbl(zn, l, tag, tx); |
34dc7c2f BB |
902 | return (err); |
903 | } | |
904 | ||
905 | int | |
906 | fzap_length(zap_name_t *zn, | |
907 | uint64_t *integer_size, uint64_t *num_integers) | |
908 | { | |
909 | zap_leaf_t *l; | |
910 | int err; | |
911 | zap_entry_handle_t zeh; | |
912 | ||
913 | err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); | |
914 | if (err != 0) | |
915 | return (err); | |
916 | err = zap_leaf_lookup(l, zn, &zeh); | |
917 | if (err != 0) | |
918 | goto out; | |
919 | ||
d2a12f9e | 920 | if (integer_size != 0) |
34dc7c2f | 921 | *integer_size = zeh.zeh_integer_size; |
d2a12f9e | 922 | if (num_integers != 0) |
34dc7c2f BB |
923 | *num_integers = zeh.zeh_num_integers; |
924 | out: | |
925 | zap_put_leaf(l); | |
926 | return (err); | |
927 | } | |
928 | ||
929 | int | |
930 | fzap_remove(zap_name_t *zn, dmu_tx_t *tx) | |
931 | { | |
932 | zap_leaf_t *l; | |
933 | int err; | |
934 | zap_entry_handle_t zeh; | |
935 | ||
936 | err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, tx, RW_WRITER, &l); | |
937 | if (err != 0) | |
938 | return (err); | |
939 | err = zap_leaf_lookup(l, zn, &zeh); | |
940 | if (err == 0) { | |
941 | zap_entry_remove(&zeh); | |
942 | zap_increment_num_entries(zn->zn_zap, -1, tx); | |
943 | } | |
944 | zap_put_leaf(l); | |
945 | return (err); | |
946 | } | |
947 | ||
428870ff BB |
948 | void |
949 | fzap_prefetch(zap_name_t *zn) | |
950 | { | |
d2a12f9e | 951 | uint64_t blk; |
428870ff | 952 | zap_t *zap = zn->zn_zap; |
428870ff | 953 | |
d2a12f9e | 954 | uint64_t idx = ZAP_HASH_IDX(zn->zn_hash, |
d683ddbb | 955 | zap_f_phys(zap)->zap_ptrtbl.zt_shift); |
428870ff BB |
956 | if (zap_idx_to_blk(zap, idx, &blk) != 0) |
957 | return; | |
d2a12f9e | 958 | int bs = FZAP_BLOCK_SHIFT(zap); |
fcff0f35 PD |
959 | dmu_prefetch(zap->zap_objset, zap->zap_object, 0, blk << bs, 1 << bs, |
960 | ZIO_PRIORITY_SYNC_READ); | |
428870ff BB |
961 | } |
962 | ||
b128c09f BB |
963 | /* |
964 | * Helper functions for consumers. | |
965 | */ | |
966 | ||
9ae529ec CS |
967 | uint64_t |
968 | zap_create_link(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, | |
969 | const char *name, dmu_tx_t *tx) | |
50c957f7 NB |
970 | { |
971 | return (zap_create_link_dnsize(os, ot, parent_obj, name, 0, tx)); | |
972 | } | |
973 | ||
974 | uint64_t | |
975 | zap_create_link_dnsize(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, | |
976 | const char *name, int dnodesize, dmu_tx_t *tx) | |
9ae529ec CS |
977 | { |
978 | uint64_t new_obj; | |
979 | ||
d2a12f9e MA |
980 | new_obj = zap_create_dnsize(os, ot, DMU_OT_NONE, 0, dnodesize, tx); |
981 | VERIFY(new_obj != 0); | |
e0ab3ab5 JS |
982 | VERIFY0(zap_add(os, parent_obj, name, sizeof (uint64_t), 1, &new_obj, |
983 | tx)); | |
9ae529ec CS |
984 | |
985 | return (new_obj); | |
986 | } | |
987 | ||
34dc7c2f BB |
988 | int |
989 | zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, | |
990 | char *name) | |
991 | { | |
992 | zap_cursor_t zc; | |
34dc7c2f BB |
993 | int err; |
994 | ||
995 | if (mask == 0) | |
996 | mask = -1ULL; | |
997 | ||
d2a12f9e | 998 | zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); |
34dc7c2f BB |
999 | for (zap_cursor_init(&zc, os, zapobj); |
1000 | (err = zap_cursor_retrieve(&zc, za)) == 0; | |
1001 | zap_cursor_advance(&zc)) { | |
1002 | if ((za->za_first_integer & mask) == (value & mask)) { | |
1003 | (void) strcpy(name, za->za_name); | |
1004 | break; | |
1005 | } | |
1006 | } | |
1007 | zap_cursor_fini(&zc); | |
d2a12f9e | 1008 | kmem_free(za, sizeof (*za)); |
34dc7c2f BB |
1009 | return (err); |
1010 | } | |
1011 | ||
b128c09f BB |
1012 | int |
1013 | zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) | |
1014 | { | |
1015 | zap_cursor_t zc; | |
d2a12f9e | 1016 | int err = 0; |
b128c09f | 1017 | |
d2a12f9e | 1018 | zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); |
b128c09f | 1019 | for (zap_cursor_init(&zc, os, fromobj); |
d2a12f9e | 1020 | zap_cursor_retrieve(&zc, za) == 0; |
b128c09f | 1021 | (void) zap_cursor_advance(&zc)) { |
d2a12f9e | 1022 | if (za->za_integer_length != 8 || za->za_num_integers != 1) { |
3a84951d WA |
1023 | err = SET_ERROR(EINVAL); |
1024 | break; | |
1025 | } | |
d2a12f9e MA |
1026 | err = zap_add(os, intoobj, za->za_name, |
1027 | 8, 1, &za->za_first_integer, tx); | |
1028 | if (err != 0) | |
3a84951d | 1029 | break; |
b128c09f BB |
1030 | } |
1031 | zap_cursor_fini(&zc); | |
d2a12f9e | 1032 | kmem_free(za, sizeof (*za)); |
3a84951d | 1033 | return (err); |
b128c09f BB |
1034 | } |
1035 | ||
428870ff BB |
1036 | int |
1037 | zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj, | |
1038 | uint64_t value, dmu_tx_t *tx) | |
1039 | { | |
1040 | zap_cursor_t zc; | |
d2a12f9e | 1041 | int err = 0; |
428870ff | 1042 | |
d2a12f9e | 1043 | zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); |
428870ff | 1044 | for (zap_cursor_init(&zc, os, fromobj); |
d2a12f9e | 1045 | zap_cursor_retrieve(&zc, za) == 0; |
428870ff | 1046 | (void) zap_cursor_advance(&zc)) { |
d2a12f9e | 1047 | if (za->za_integer_length != 8 || za->za_num_integers != 1) { |
3a84951d WA |
1048 | err = SET_ERROR(EINVAL); |
1049 | break; | |
1050 | } | |
d2a12f9e | 1051 | err = zap_add(os, intoobj, za->za_name, |
428870ff | 1052 | 8, 1, &value, tx); |
d4a72f23 | 1053 | if (err != 0) |
3a84951d | 1054 | break; |
428870ff BB |
1055 | } |
1056 | zap_cursor_fini(&zc); | |
d2a12f9e | 1057 | kmem_free(za, sizeof (*za)); |
3a84951d | 1058 | return (err); |
428870ff BB |
1059 | } |
1060 | ||
1061 | int | |
1062 | zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj, | |
1063 | dmu_tx_t *tx) | |
1064 | { | |
1065 | zap_cursor_t zc; | |
d2a12f9e | 1066 | int err = 0; |
428870ff | 1067 | |
d2a12f9e | 1068 | zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); |
428870ff | 1069 | for (zap_cursor_init(&zc, os, fromobj); |
d2a12f9e | 1070 | zap_cursor_retrieve(&zc, za) == 0; |
428870ff BB |
1071 | (void) zap_cursor_advance(&zc)) { |
1072 | uint64_t delta = 0; | |
1073 | ||
d2a12f9e | 1074 | if (za->za_integer_length != 8 || za->za_num_integers != 1) { |
3a84951d WA |
1075 | err = SET_ERROR(EINVAL); |
1076 | break; | |
1077 | } | |
428870ff | 1078 | |
d2a12f9e | 1079 | err = zap_lookup(os, intoobj, za->za_name, 8, 1, &delta); |
428870ff | 1080 | if (err != 0 && err != ENOENT) |
3a84951d | 1081 | break; |
d2a12f9e MA |
1082 | delta += za->za_first_integer; |
1083 | err = zap_update(os, intoobj, za->za_name, 8, 1, &delta, tx); | |
1084 | if (err != 0) | |
3a84951d | 1085 | break; |
428870ff BB |
1086 | } |
1087 | zap_cursor_fini(&zc); | |
d2a12f9e | 1088 | kmem_free(za, sizeof (*za)); |
3a84951d | 1089 | return (err); |
428870ff BB |
1090 | } |
1091 | ||
b128c09f BB |
1092 | int |
1093 | zap_add_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) | |
1094 | { | |
1095 | char name[20]; | |
1096 | ||
1097 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); | |
1098 | return (zap_add(os, obj, name, 8, 1, &value, tx)); | |
1099 | } | |
1100 | ||
1101 | int | |
1102 | zap_remove_int(objset_t *os, uint64_t obj, uint64_t value, dmu_tx_t *tx) | |
1103 | { | |
1104 | char name[20]; | |
1105 | ||
1106 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); | |
1107 | return (zap_remove(os, obj, name, tx)); | |
1108 | } | |
1109 | ||
1110 | int | |
1111 | zap_lookup_int(objset_t *os, uint64_t obj, uint64_t value) | |
1112 | { | |
1113 | char name[20]; | |
1114 | ||
1115 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)value); | |
1116 | return (zap_lookup(os, obj, name, 8, 1, &value)); | |
1117 | } | |
34dc7c2f | 1118 | |
428870ff BB |
1119 | int |
1120 | zap_add_int_key(objset_t *os, uint64_t obj, | |
1121 | uint64_t key, uint64_t value, dmu_tx_t *tx) | |
1122 | { | |
1123 | char name[20]; | |
1124 | ||
1125 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); | |
1126 | return (zap_add(os, obj, name, 8, 1, &value, tx)); | |
1127 | } | |
1128 | ||
753c3839 MA |
1129 | int |
1130 | zap_update_int_key(objset_t *os, uint64_t obj, | |
1131 | uint64_t key, uint64_t value, dmu_tx_t *tx) | |
1132 | { | |
1133 | char name[20]; | |
1134 | ||
1135 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); | |
1136 | return (zap_update(os, obj, name, 8, 1, &value, tx)); | |
1137 | } | |
1138 | ||
428870ff BB |
1139 | int |
1140 | zap_lookup_int_key(objset_t *os, uint64_t obj, uint64_t key, uint64_t *valuep) | |
1141 | { | |
1142 | char name[20]; | |
1143 | ||
1144 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); | |
1145 | return (zap_lookup(os, obj, name, 8, 1, valuep)); | |
1146 | } | |
1147 | ||
1148 | int | |
1149 | zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta, | |
1150 | dmu_tx_t *tx) | |
1151 | { | |
1152 | uint64_t value = 0; | |
428870ff BB |
1153 | |
1154 | if (delta == 0) | |
1155 | return (0); | |
1156 | ||
d2a12f9e | 1157 | int err = zap_lookup(os, obj, name, 8, 1, &value); |
428870ff BB |
1158 | if (err != 0 && err != ENOENT) |
1159 | return (err); | |
1160 | value += delta; | |
1161 | if (value == 0) | |
1162 | err = zap_remove(os, obj, name, tx); | |
1163 | else | |
1164 | err = zap_update(os, obj, name, 8, 1, &value, tx); | |
1165 | return (err); | |
1166 | } | |
1167 | ||
1168 | int | |
1169 | zap_increment_int(objset_t *os, uint64_t obj, uint64_t key, int64_t delta, | |
1170 | dmu_tx_t *tx) | |
1171 | { | |
1172 | char name[20]; | |
1173 | ||
1174 | (void) snprintf(name, sizeof (name), "%llx", (longlong_t)key); | |
1175 | return (zap_increment(os, obj, name, delta, tx)); | |
1176 | } | |
1177 | ||
34dc7c2f BB |
1178 | /* |
1179 | * Routines for iterating over the attributes. | |
1180 | */ | |
1181 | ||
1182 | int | |
1183 | fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za) | |
1184 | { | |
1185 | int err = ENOENT; | |
1186 | zap_entry_handle_t zeh; | |
1187 | zap_leaf_t *l; | |
1188 | ||
1189 | /* retrieve the next entry at or after zc_hash/zc_cd */ | |
1190 | /* if no entry, return ENOENT */ | |
1191 | ||
1192 | if (zc->zc_leaf && | |
1193 | (ZAP_HASH_IDX(zc->zc_hash, | |
d683ddbb JG |
1194 | zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix_len) != |
1195 | zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix)) { | |
34dc7c2f BB |
1196 | rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); |
1197 | zap_put_leaf(zc->zc_leaf); | |
1198 | zc->zc_leaf = NULL; | |
1199 | } | |
1200 | ||
1201 | again: | |
1202 | if (zc->zc_leaf == NULL) { | |
1203 | err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER, | |
1204 | &zc->zc_leaf); | |
1205 | if (err != 0) | |
1206 | return (err); | |
1207 | } else { | |
1208 | rw_enter(&zc->zc_leaf->l_rwlock, RW_READER); | |
1209 | } | |
1210 | l = zc->zc_leaf; | |
1211 | ||
1212 | err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh); | |
1213 | ||
1214 | if (err == ENOENT) { | |
6ca636a1 | 1215 | if (zap_leaf_phys(l)->l_hdr.lh_prefix_len == 0) { |
34dc7c2f | 1216 | zc->zc_hash = -1ULL; |
6ca636a1 | 1217 | zc->zc_cd = 0; |
34dc7c2f | 1218 | } else { |
6ca636a1 GN |
1219 | uint64_t nocare = (1ULL << |
1220 | (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len)) - 1; | |
1221 | ||
1222 | zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1; | |
1223 | zc->zc_cd = 0; | |
1224 | ||
1225 | if (zc->zc_hash == 0) { | |
1226 | zc->zc_hash = -1ULL; | |
1227 | } else { | |
1228 | zap_put_leaf(zc->zc_leaf); | |
1229 | zc->zc_leaf = NULL; | |
1230 | goto again; | |
1231 | } | |
34dc7c2f BB |
1232 | } |
1233 | } | |
1234 | ||
1235 | if (err == 0) { | |
1236 | zc->zc_hash = zeh.zeh_hash; | |
1237 | zc->zc_cd = zeh.zeh_cd; | |
1238 | za->za_integer_length = zeh.zeh_integer_size; | |
1239 | za->za_num_integers = zeh.zeh_num_integers; | |
1240 | if (zeh.zeh_num_integers == 0) { | |
1241 | za->za_first_integer = 0; | |
1242 | } else { | |
1243 | err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer); | |
1244 | ASSERT(err == 0 || err == EOVERFLOW); | |
1245 | } | |
428870ff | 1246 | err = zap_entry_read_name(zap, &zeh, |
34dc7c2f BB |
1247 | sizeof (za->za_name), za->za_name); |
1248 | ASSERT(err == 0); | |
1249 | ||
1250 | za->za_normalization_conflict = | |
1251 | zap_entry_normalization_conflict(&zeh, | |
1252 | NULL, za->za_name, zap); | |
1253 | } | |
1254 | rw_exit(&zc->zc_leaf->l_rwlock); | |
1255 | return (err); | |
1256 | } | |
1257 | ||
34dc7c2f BB |
1258 | static void |
1259 | zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) | |
1260 | { | |
34dc7c2f BB |
1261 | uint64_t lastblk = 0; |
1262 | ||
1263 | /* | |
1264 | * NB: if a leaf has more pointers than an entire ptrtbl block | |
1265 | * can hold, then it'll be accounted for more than once, since | |
1266 | * we won't have lastblk. | |
1267 | */ | |
d2a12f9e | 1268 | for (int i = 0; i < len; i++) { |
34dc7c2f BB |
1269 | zap_leaf_t *l; |
1270 | ||
1271 | if (tbl[i] == lastblk) | |
1272 | continue; | |
1273 | lastblk = tbl[i]; | |
1274 | ||
d2a12f9e | 1275 | int err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); |
34dc7c2f BB |
1276 | if (err == 0) { |
1277 | zap_leaf_stats(zap, l, zs); | |
1278 | zap_put_leaf(l); | |
1279 | } | |
1280 | } | |
1281 | } | |
1282 | ||
1283 | void | |
1284 | fzap_get_stats(zap_t *zap, zap_stats_t *zs) | |
1285 | { | |
1286 | int bs = FZAP_BLOCK_SHIFT(zap); | |
1287 | zs->zs_blocksize = 1ULL << bs; | |
1288 | ||
1289 | /* | |
1290 | * Set zap_phys_t fields | |
1291 | */ | |
d683ddbb JG |
1292 | zs->zs_num_leafs = zap_f_phys(zap)->zap_num_leafs; |
1293 | zs->zs_num_entries = zap_f_phys(zap)->zap_num_entries; | |
1294 | zs->zs_num_blocks = zap_f_phys(zap)->zap_freeblk; | |
1295 | zs->zs_block_type = zap_f_phys(zap)->zap_block_type; | |
1296 | zs->zs_magic = zap_f_phys(zap)->zap_magic; | |
1297 | zs->zs_salt = zap_f_phys(zap)->zap_salt; | |
34dc7c2f BB |
1298 | |
1299 | /* | |
1300 | * Set zap_ptrtbl fields | |
1301 | */ | |
d683ddbb JG |
1302 | zs->zs_ptrtbl_len = 1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift; |
1303 | zs->zs_ptrtbl_nextblk = zap_f_phys(zap)->zap_ptrtbl.zt_nextblk; | |
34dc7c2f | 1304 | zs->zs_ptrtbl_blks_copied = |
d683ddbb JG |
1305 | zap_f_phys(zap)->zap_ptrtbl.zt_blks_copied; |
1306 | zs->zs_ptrtbl_zt_blk = zap_f_phys(zap)->zap_ptrtbl.zt_blk; | |
1307 | zs->zs_ptrtbl_zt_numblks = zap_f_phys(zap)->zap_ptrtbl.zt_numblks; | |
1308 | zs->zs_ptrtbl_zt_shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift; | |
34dc7c2f | 1309 | |
d683ddbb | 1310 | if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) { |
34dc7c2f BB |
1311 | /* the ptrtbl is entirely in the header block. */ |
1312 | zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), | |
1313 | 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs); | |
1314 | } else { | |
fcff0f35 | 1315 | dmu_prefetch(zap->zap_objset, zap->zap_object, 0, |
d683ddbb | 1316 | zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs, |
fcff0f35 PD |
1317 | zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs, |
1318 | ZIO_PRIORITY_SYNC_READ); | |
34dc7c2f | 1319 | |
d2a12f9e | 1320 | for (int b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks; |
34dc7c2f BB |
1321 | b++) { |
1322 | dmu_buf_t *db; | |
1323 | int err; | |
1324 | ||
1325 | err = dmu_buf_hold(zap->zap_objset, zap->zap_object, | |
d683ddbb | 1326 | (zap_f_phys(zap)->zap_ptrtbl.zt_blk + b) << bs, |
428870ff | 1327 | FTAG, &db, DMU_READ_NO_PREFETCH); |
34dc7c2f BB |
1328 | if (err == 0) { |
1329 | zap_stats_ptrtbl(zap, db->db_data, | |
1330 | 1<<(bs-3), zs); | |
1331 | dmu_buf_rele(db, FTAG); | |
1332 | } | |
1333 | } | |
1334 | } | |
1335 | } |