Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/dmu.c @ 2743:632c24f376ff
6461438 zfs send/recv code should live in its own file
| author | ahrens |
|---|---|
| date | Fri, 15 Sep 2006 11:21:46 -0700 |
| parents | 12e2ad22b970 |
| children | c0259887ebbc |
| rev | line source |
|---|---|
| 789 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
| 1544 | 5 * Common Development and Distribution License (the "License"). |
| 6 * You may not use this file except in compliance with the License. | |
| 789 | 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 /* | |
| 1544 | 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. |
| 789 | 23 * Use is subject to license terms. |
| 24 */ | |
| 25 | |
| 26 #pragma ident "%Z%%M% %I% %E% SMI" | |
| 27 | |
| 28 #include <sys/dmu.h> | |
| 29 #include <sys/dmu_impl.h> | |
| 30 #include <sys/dmu_tx.h> | |
| 31 #include <sys/dbuf.h> | |
| 32 #include <sys/dnode.h> | |
| 33 #include <sys/zfs_context.h> | |
| 34 #include <sys/dmu_objset.h> | |
| 35 #include <sys/dmu_traverse.h> | |
| 36 #include <sys/dsl_dataset.h> | |
| 37 #include <sys/dsl_dir.h> | |
| 38 #include <sys/dsl_pool.h> | |
| 2199 | 39 #include <sys/dsl_synctask.h> |
| 789 | 40 #include <sys/dmu_zfetch.h> |
| 41 #include <sys/zfs_ioctl.h> | |
| 42 #include <sys/zap.h> | |
| 1544 | 43 #include <sys/zio_checksum.h> |
|
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44 #ifdef _KERNEL |
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45 #include <sys/vmsystm.h> |
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46 #endif |
| 789 | 47 |
| 48 const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES] = { | |
| 49 { byteswap_uint8_array, TRUE, "unallocated" }, | |
| 50 { zap_byteswap, TRUE, "object directory" }, | |
| 51 { byteswap_uint64_array, TRUE, "object array" }, | |
| 52 { byteswap_uint8_array, TRUE, "packed nvlist" }, | |
| 53 { byteswap_uint64_array, TRUE, "packed nvlist size" }, | |
| 54 { byteswap_uint64_array, TRUE, "bplist" }, | |
| 55 { byteswap_uint64_array, TRUE, "bplist header" }, | |
| 56 { byteswap_uint64_array, TRUE, "SPA space map header" }, | |
| 57 { byteswap_uint64_array, TRUE, "SPA space map" }, | |
| 58 { byteswap_uint64_array, TRUE, "ZIL intent log" }, | |
| 59 { dnode_buf_byteswap, TRUE, "DMU dnode" }, | |
| 60 { dmu_objset_byteswap, TRUE, "DMU objset" }, | |
| 61 { byteswap_uint64_array, TRUE, "DSL directory" }, | |
| 62 { zap_byteswap, TRUE, "DSL directory child map"}, | |
| 63 { zap_byteswap, TRUE, "DSL dataset snap map" }, | |
| 64 { zap_byteswap, TRUE, "DSL props" }, | |
| 65 { byteswap_uint64_array, TRUE, "DSL dataset" }, | |
| 66 { zfs_znode_byteswap, TRUE, "ZFS znode" }, | |
| 67 { zfs_acl_byteswap, TRUE, "ZFS ACL" }, | |
| 68 { byteswap_uint8_array, FALSE, "ZFS plain file" }, | |
| 69 { zap_byteswap, TRUE, "ZFS directory" }, | |
| 70 { zap_byteswap, TRUE, "ZFS master node" }, | |
| 71 { zap_byteswap, TRUE, "ZFS delete queue" }, | |
| 72 { byteswap_uint8_array, FALSE, "zvol object" }, | |
| 73 { zap_byteswap, TRUE, "zvol prop" }, | |
| 74 { byteswap_uint8_array, FALSE, "other uint8[]" }, | |
| 75 { byteswap_uint64_array, FALSE, "other uint64[]" }, | |
| 76 { zap_byteswap, TRUE, "other ZAP" }, | |
| 1544 | 77 { zap_byteswap, TRUE, "persistent error log" }, |
| 789 | 78 }; |
| 79 | |
| 80 int | |
| 1544 | 81 dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset, |
| 82 void *tag, dmu_buf_t **dbp) | |
| 789 | 83 { |
| 84 dnode_t *dn; | |
| 85 uint64_t blkid; | |
| 86 dmu_buf_impl_t *db; | |
| 1544 | 87 int err; |
| 789 | 88 |
| 1544 | 89 err = dnode_hold(os->os, object, FTAG, &dn); |
| 90 if (err) | |
| 91 return (err); | |
| 789 | 92 blkid = dbuf_whichblock(dn, offset); |
| 93 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
| 1544 | 94 db = dbuf_hold(dn, blkid, tag); |
| 789 | 95 rw_exit(&dn->dn_struct_rwlock); |
| 1544 | 96 if (db == NULL) { |
| 97 err = EIO; | |
| 98 } else { | |
| 99 err = dbuf_read(db, NULL, DB_RF_CANFAIL); | |
| 100 if (err) { | |
| 101 dbuf_rele(db, tag); | |
| 102 db = NULL; | |
| 103 } | |
| 104 } | |
| 105 | |
| 789 | 106 dnode_rele(dn, FTAG); |
| 1544 | 107 *dbp = &db->db; |
| 108 return (err); | |
| 789 | 109 } |
| 110 | |
| 111 int | |
| 112 dmu_bonus_max(void) | |
| 113 { | |
| 114 return (DN_MAX_BONUSLEN); | |
| 115 } | |
| 116 | |
| 117 /* | |
| 1544 | 118 * returns ENOENT, EIO, or 0. |
| 789 | 119 */ |
| 1544 | 120 int |
| 121 dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp) | |
| 789 | 122 { |
| 1544 | 123 dnode_t *dn; |
| 124 int err, count; | |
| 789 | 125 dmu_buf_impl_t *db; |
| 126 | |
| 1544 | 127 err = dnode_hold(os->os, object, FTAG, &dn); |
| 128 if (err) | |
| 129 return (err); | |
| 789 | 130 |
| 1544 | 131 rw_enter(&dn->dn_struct_rwlock, RW_READER); |
| 132 if (dn->dn_bonus == NULL) { | |
| 789 | 133 rw_exit(&dn->dn_struct_rwlock); |
| 1544 | 134 rw_enter(&dn->dn_struct_rwlock, RW_WRITER); |
| 135 if (dn->dn_bonus == NULL) | |
| 136 dn->dn_bonus = dbuf_create_bonus(dn); | |
| 789 | 137 } |
| 1544 | 138 db = dn->dn_bonus; |
| 139 rw_exit(&dn->dn_struct_rwlock); | |
| 140 mutex_enter(&db->db_mtx); | |
| 141 count = refcount_add(&db->db_holds, tag); | |
| 142 mutex_exit(&db->db_mtx); | |
| 143 if (count == 1) | |
| 144 dnode_add_ref(dn, db); | |
| 789 | 145 dnode_rele(dn, FTAG); |
| 1544 | 146 |
| 147 VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED)); | |
| 148 | |
| 149 *dbp = &db->db; | |
| 150 return (0); | |
| 789 | 151 } |
| 152 | |
| 2391 | 153 /* |
| 154 * Note: longer-term, we should modify all of the dmu_buf_*() interfaces | |
| 155 * to take a held dnode rather than <os, object> -- the lookup is wasteful, | |
| 156 * and can induce severe lock contention when writing to several files | |
| 157 * whose dnodes are in the same block. | |
| 158 */ | |
| 159 static int | |
| 160 dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset, | |
| 1544 | 161 uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) |
| 789 | 162 { |
| 163 dmu_buf_t **dbp; | |
| 164 uint64_t blkid, nblks, i; | |
| 1544 | 165 uint32_t flags; |
| 166 int err; | |
| 167 zio_t *zio; | |
| 168 | |
| 169 ASSERT(length <= DMU_MAX_ACCESS); | |
| 789 | 170 |
| 1544 | 171 flags = DB_RF_CANFAIL | DB_RF_NEVERWAIT; |
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172 if (length > zfetch_array_rd_sz) |
| 1544 | 173 flags |= DB_RF_NOPREFETCH; |
| 174 | |
| 789 | 175 rw_enter(&dn->dn_struct_rwlock, RW_READER); |
| 176 if (dn->dn_datablkshift) { | |
| 177 int blkshift = dn->dn_datablkshift; | |
| 178 nblks = (P2ROUNDUP(offset+length, 1ULL<<blkshift) - | |
| 179 P2ALIGN(offset, 1ULL<<blkshift)) >> blkshift; | |
| 180 } else { | |
| 181 ASSERT3U(offset + length, <=, dn->dn_datablksz); | |
| 182 nblks = 1; | |
| 183 } | |
| 1544 | 184 dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_SLEEP); |
| 789 | 185 |
| 1544 | 186 zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, TRUE); |
| 789 | 187 blkid = dbuf_whichblock(dn, offset); |
| 188 for (i = 0; i < nblks; i++) { | |
| 1544 | 189 dmu_buf_impl_t *db = dbuf_hold(dn, blkid+i, tag); |
| 190 if (db == NULL) { | |
| 191 rw_exit(&dn->dn_struct_rwlock); | |
| 192 dmu_buf_rele_array(dbp, nblks, tag); | |
| 193 zio_nowait(zio); | |
| 194 return (EIO); | |
| 195 } | |
| 196 /* initiate async i/o */ | |
| 2391 | 197 if (read) { |
| 1544 | 198 rw_exit(&dn->dn_struct_rwlock); |
| 199 (void) dbuf_read(db, zio, flags); | |
| 200 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
| 201 } | |
| 202 dbp[i] = &db->db; | |
| 789 | 203 } |
| 204 rw_exit(&dn->dn_struct_rwlock); | |
| 205 | |
| 1544 | 206 /* wait for async i/o */ |
| 207 err = zio_wait(zio); | |
| 208 if (err) { | |
| 209 dmu_buf_rele_array(dbp, nblks, tag); | |
| 210 return (err); | |
| 789 | 211 } |
| 212 | |
| 1544 | 213 /* wait for other io to complete */ |
| 214 if (read) { | |
| 215 for (i = 0; i < nblks; i++) { | |
| 216 dmu_buf_impl_t *db = (dmu_buf_impl_t *)dbp[i]; | |
| 217 mutex_enter(&db->db_mtx); | |
| 218 while (db->db_state == DB_READ || | |
| 219 db->db_state == DB_FILL) | |
| 220 cv_wait(&db->db_changed, &db->db_mtx); | |
| 221 if (db->db_state == DB_UNCACHED) | |
| 222 err = EIO; | |
| 223 mutex_exit(&db->db_mtx); | |
| 224 if (err) { | |
| 225 dmu_buf_rele_array(dbp, nblks, tag); | |
| 226 return (err); | |
| 227 } | |
| 228 } | |
| 229 } | |
| 789 | 230 |
| 1544 | 231 *numbufsp = nblks; |
| 232 *dbpp = dbp; | |
| 233 return (0); | |
| 789 | 234 } |
| 235 | |
| 2391 | 236 int |
| 237 dmu_buf_hold_array(objset_t *os, uint64_t object, uint64_t offset, | |
| 238 uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) | |
| 239 { | |
| 240 dnode_t *dn; | |
| 241 int err; | |
| 242 | |
| 243 err = dnode_hold(os->os, object, FTAG, &dn); | |
| 244 if (err) | |
| 245 return (err); | |
| 246 | |
| 247 err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, | |
| 248 numbufsp, dbpp); | |
| 249 | |
| 250 dnode_rele(dn, FTAG); | |
| 251 | |
| 252 return (err); | |
| 253 } | |
| 254 | |
| 255 int | |
| 256 dmu_buf_hold_array_by_bonus(dmu_buf_t *db, uint64_t offset, | |
| 257 uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp) | |
| 258 { | |
| 259 dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; | |
| 260 int err; | |
| 261 | |
| 262 err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag, | |
| 263 numbufsp, dbpp); | |
| 264 | |
| 265 return (err); | |
| 266 } | |
| 267 | |
| 789 | 268 void |
| 1544 | 269 dmu_buf_rele_array(dmu_buf_t **dbp_fake, int numbufs, void *tag) |
| 789 | 270 { |
| 271 int i; | |
| 272 dmu_buf_impl_t **dbp = (dmu_buf_impl_t **)dbp_fake; | |
| 273 | |
| 274 if (numbufs == 0) | |
| 275 return; | |
| 276 | |
| 1544 | 277 for (i = 0; i < numbufs; i++) { |
| 278 if (dbp[i]) | |
| 279 dbuf_rele(dbp[i], tag); | |
| 280 } | |
| 789 | 281 |
| 282 kmem_free(dbp, sizeof (dmu_buf_t *) * numbufs); | |
| 283 } | |
| 284 | |
| 285 void | |
| 286 dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset, uint64_t len) | |
| 287 { | |
| 288 dnode_t *dn; | |
| 289 uint64_t blkid; | |
| 1544 | 290 int nblks, i, err; |
| 789 | 291 |
| 292 if (len == 0) { /* they're interested in the bonus buffer */ | |
| 293 dn = os->os->os_meta_dnode; | |
| 294 | |
| 295 if (object == 0 || object >= DN_MAX_OBJECT) | |
| 296 return; | |
| 297 | |
| 298 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
| 299 blkid = dbuf_whichblock(dn, object * sizeof (dnode_phys_t)); | |
| 300 dbuf_prefetch(dn, blkid); | |
| 301 rw_exit(&dn->dn_struct_rwlock); | |
| 302 return; | |
| 303 } | |
| 304 | |
| 305 /* | |
| 306 * XXX - Note, if the dnode for the requested object is not | |
| 307 * already cached, we will do a *synchronous* read in the | |
| 308 * dnode_hold() call. The same is true for any indirects. | |
| 309 */ | |
| 1544 | 310 err = dnode_hold(os->os, object, FTAG, &dn); |
| 311 if (err != 0) | |
| 789 | 312 return; |
| 313 | |
| 314 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
| 315 if (dn->dn_datablkshift) { | |
| 316 int blkshift = dn->dn_datablkshift; | |
| 317 nblks = (P2ROUNDUP(offset+len, 1<<blkshift) - | |
| 318 P2ALIGN(offset, 1<<blkshift)) >> blkshift; | |
| 319 } else { | |
| 320 nblks = (offset < dn->dn_datablksz); | |
| 321 } | |
| 322 | |
| 323 if (nblks != 0) { | |
| 324 blkid = dbuf_whichblock(dn, offset); | |
| 325 for (i = 0; i < nblks; i++) | |
| 326 dbuf_prefetch(dn, blkid+i); | |
| 327 } | |
| 328 | |
| 329 rw_exit(&dn->dn_struct_rwlock); | |
| 330 | |
| 331 dnode_rele(dn, FTAG); | |
| 332 } | |
| 333 | |
| 1544 | 334 int |
| 789 | 335 dmu_free_range(objset_t *os, uint64_t object, uint64_t offset, |
| 336 uint64_t size, dmu_tx_t *tx) | |
| 337 { | |
| 1544 | 338 dnode_t *dn; |
| 339 int err = dnode_hold(os->os, object, FTAG, &dn); | |
| 340 if (err) | |
| 341 return (err); | |
| 789 | 342 ASSERT(offset < UINT64_MAX); |
| 343 ASSERT(size == -1ULL || size <= UINT64_MAX - offset); | |
| 344 dnode_free_range(dn, offset, size, tx); | |
| 345 dnode_rele(dn, FTAG); | |
| 1544 | 346 return (0); |
| 789 | 347 } |
| 348 | |
| 1544 | 349 int |
| 350 dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, | |
| 351 void *buf) | |
| 789 | 352 { |
| 353 dnode_t *dn; | |
| 354 dmu_buf_t **dbp; | |
| 1544 | 355 int numbufs, i, err; |
| 789 | 356 |
| 1544 | 357 /* |
| 358 * Deal with odd block sizes, where there can't be data past the | |
| 359 * first block. | |
| 360 */ | |
| 361 err = dnode_hold(os->os, object, FTAG, &dn); | |
| 362 if (err) | |
| 363 return (err); | |
| 789 | 364 if (dn->dn_datablkshift == 0) { |
| 365 int newsz = offset > dn->dn_datablksz ? 0 : | |
| 366 MIN(size, dn->dn_datablksz - offset); | |
| 367 bzero((char *)buf + newsz, size - newsz); | |
| 368 size = newsz; | |
| 369 } | |
| 370 dnode_rele(dn, FTAG); | |
| 371 | |
| 372 while (size > 0) { | |
| 373 uint64_t mylen = MIN(size, DMU_MAX_ACCESS / 2); | |
| 374 int err; | |
| 375 | |
| 376 /* | |
| 377 * NB: we could do this block-at-a-time, but it's nice | |
| 378 * to be reading in parallel. | |
| 379 */ | |
| 1544 | 380 err = dmu_buf_hold_array(os, object, offset, mylen, |
| 381 TRUE, FTAG, &numbufs, &dbp); | |
| 382 if (err) | |
| 789 | 383 return (err); |
| 384 | |
| 385 for (i = 0; i < numbufs; i++) { | |
| 386 int tocpy; | |
| 387 int bufoff; | |
| 388 dmu_buf_t *db = dbp[i]; | |
| 389 | |
| 390 ASSERT(size > 0); | |
| 391 | |
| 392 bufoff = offset - db->db_offset; | |
| 393 tocpy = (int)MIN(db->db_size - bufoff, size); | |
| 394 | |
| 395 bcopy((char *)db->db_data + bufoff, buf, tocpy); | |
| 396 | |
| 397 offset += tocpy; | |
| 398 size -= tocpy; | |
| 399 buf = (char *)buf + tocpy; | |
| 400 } | |
| 1544 | 401 dmu_buf_rele_array(dbp, numbufs, FTAG); |
| 789 | 402 } |
| 403 return (0); | |
| 404 } | |
| 405 | |
| 406 void | |
| 407 dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, | |
| 408 const void *buf, dmu_tx_t *tx) | |
| 409 { | |
| 410 dmu_buf_t **dbp; | |
| 411 int numbufs, i; | |
| 412 | |
| 2391 | 413 if (size == 0) |
| 414 return; | |
| 415 | |
| 1544 | 416 VERIFY(0 == dmu_buf_hold_array(os, object, offset, size, |
| 417 FALSE, FTAG, &numbufs, &dbp)); | |
| 789 | 418 |
| 419 for (i = 0; i < numbufs; i++) { | |
| 420 int tocpy; | |
| 421 int bufoff; | |
| 422 dmu_buf_t *db = dbp[i]; | |
| 423 | |
| 424 ASSERT(size > 0); | |
| 425 | |
| 426 bufoff = offset - db->db_offset; | |
| 427 tocpy = (int)MIN(db->db_size - bufoff, size); | |
| 428 | |
| 429 ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); | |
| 430 | |
| 431 if (tocpy == db->db_size) | |
| 432 dmu_buf_will_fill(db, tx); | |
| 433 else | |
| 434 dmu_buf_will_dirty(db, tx); | |
| 435 | |
| 436 bcopy(buf, (char *)db->db_data + bufoff, tocpy); | |
| 437 | |
| 438 if (tocpy == db->db_size) | |
| 439 dmu_buf_fill_done(db, tx); | |
| 440 | |
| 441 offset += tocpy; | |
| 442 size -= tocpy; | |
| 443 buf = (char *)buf + tocpy; | |
| 444 } | |
| 1544 | 445 dmu_buf_rele_array(dbp, numbufs, FTAG); |
| 789 | 446 } |
| 447 | |
| 448 #ifdef _KERNEL | |
| 449 int | |
| 450 dmu_write_uio(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, | |
| 451 uio_t *uio, dmu_tx_t *tx) | |
| 452 { | |
| 453 dmu_buf_t **dbp; | |
| 454 int numbufs, i; | |
| 455 int err = 0; | |
| 456 | |
| 2391 | 457 if (size == 0) |
| 458 return (0); | |
| 459 | |
| 1544 | 460 err = dmu_buf_hold_array(os, object, offset, size, |
| 461 FALSE, FTAG, &numbufs, &dbp); | |
| 462 if (err) | |
| 463 return (err); | |
| 789 | 464 |
| 465 for (i = 0; i < numbufs; i++) { | |
| 466 int tocpy; | |
| 467 int bufoff; | |
| 468 dmu_buf_t *db = dbp[i]; | |
| 469 | |
| 470 ASSERT(size > 0); | |
| 471 | |
| 472 bufoff = offset - db->db_offset; | |
| 473 tocpy = (int)MIN(db->db_size - bufoff, size); | |
| 474 | |
| 475 ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); | |
| 476 | |
| 477 if (tocpy == db->db_size) | |
| 478 dmu_buf_will_fill(db, tx); | |
| 479 else | |
| 480 dmu_buf_will_dirty(db, tx); | |
| 481 | |
| 482 /* | |
| 483 * XXX uiomove could block forever (eg. nfs-backed | |
| 484 * pages). There needs to be a uiolockdown() function | |
| 485 * to lock the pages in memory, so that uiomove won't | |
| 486 * block. | |
| 487 */ | |
| 488 err = uiomove((char *)db->db_data + bufoff, tocpy, | |
| 489 UIO_WRITE, uio); | |
| 490 | |
| 491 if (tocpy == db->db_size) | |
| 492 dmu_buf_fill_done(db, tx); | |
| 493 | |
| 494 if (err) | |
| 495 break; | |
| 496 | |
| 497 offset += tocpy; | |
| 498 size -= tocpy; | |
| 499 } | |
| 1544 | 500 dmu_buf_rele_array(dbp, numbufs, FTAG); |
| 789 | 501 return (err); |
| 502 } | |
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504 int |
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505 dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, |
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506 page_t *pp, dmu_tx_t *tx) |
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507 { |
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508 dmu_buf_t **dbp; |
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509 int numbufs, i; |
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510 int err; |
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511 |
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512 if (size == 0) |
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513 return (0); |
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514 |
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515 err = dmu_buf_hold_array(os, object, offset, size, |
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516 FALSE, FTAG, &numbufs, &dbp); |
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517 if (err) |
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518 return (err); |
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519 |
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520 for (i = 0; i < numbufs; i++) { |
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521 int tocpy, copied, thiscpy; |
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522 int bufoff; |
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523 dmu_buf_t *db = dbp[i]; |
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524 caddr_t va; |
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525 |
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526 ASSERT(size > 0); |
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527 ASSERT3U(db->db_size, >=, PAGESIZE); |
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528 |
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529 bufoff = offset - db->db_offset; |
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530 tocpy = (int)MIN(db->db_size - bufoff, size); |
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531 |
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532 ASSERT(i == 0 || i == numbufs-1 || tocpy == db->db_size); |
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533 |
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534 if (tocpy == db->db_size) |
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535 dmu_buf_will_fill(db, tx); |
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536 else |
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537 dmu_buf_will_dirty(db, tx); |
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538 |
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539 for (copied = 0; copied < tocpy; copied += PAGESIZE) { |
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540 ASSERT3U(pp->p_offset, ==, db->db_offset + bufoff); |
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541 thiscpy = MIN(PAGESIZE, tocpy - copied); |
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542 va = ppmapin(pp, PROT_READ, (caddr_t)-1); |
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543 bcopy(va, (char *)db->db_data + bufoff, thiscpy); |
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544 ppmapout(va); |
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545 pp = pp->p_next; |
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546 bufoff += PAGESIZE; |
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547 } |
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548 |
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549 if (tocpy == db->db_size) |
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550 dmu_buf_fill_done(db, tx); |
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551 |
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552 if (err) |
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553 break; |
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554 |
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555 offset += tocpy; |
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556 size -= tocpy; |
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557 } |
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558 dmu_buf_rele_array(dbp, numbufs, FTAG); |
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559 return (err); |
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560 } |
| 789 | 561 #endif |
| 562 | |
| 2237 | 563 typedef struct { |
| 564 uint64_t txg; | |
| 565 dmu_buf_impl_t *db; | |
| 566 dmu_sync_cb_t *done; | |
| 567 void *arg; | |
| 568 } dmu_sync_cbin_t; | |
| 569 | |
| 570 typedef union { | |
| 571 dmu_sync_cbin_t data; | |
| 572 blkptr_t blk; | |
| 573 } dmu_sync_cbarg_t; | |
| 574 | |
| 575 /* ARGSUSED */ | |
| 576 static void | |
| 577 dmu_sync_done(zio_t *zio, arc_buf_t *buf, void *varg) | |
| 578 { | |
| 579 dmu_sync_cbin_t *in = (dmu_sync_cbin_t *)varg; | |
| 580 dmu_buf_impl_t *db = in->db; | |
| 581 uint64_t txg = in->txg; | |
| 582 dmu_sync_cb_t *done = in->done; | |
| 583 void *arg = in->arg; | |
| 584 blkptr_t *blk = (blkptr_t *)varg; | |
| 585 | |
| 586 if (!BP_IS_HOLE(zio->io_bp)) { | |
| 587 zio->io_bp->blk_fill = 1; | |
| 588 BP_SET_TYPE(zio->io_bp, db->db_dnode->dn_type); | |
| 589 BP_SET_LEVEL(zio->io_bp, 0); | |
| 590 } | |
| 591 | |
| 592 *blk = *zio->io_bp; /* structure assignment */ | |
| 593 | |
| 594 mutex_enter(&db->db_mtx); | |
| 595 ASSERT(db->db_d.db_overridden_by[txg&TXG_MASK] == IN_DMU_SYNC); | |
| 596 db->db_d.db_overridden_by[txg&TXG_MASK] = blk; | |
| 597 cv_broadcast(&db->db_changed); | |
| 598 mutex_exit(&db->db_mtx); | |
| 599 | |
| 600 if (done) | |
| 601 done(&(db->db), arg); | |
| 602 } | |
| 603 | |
| 789 | 604 /* |
| 2237 | 605 * Intent log support: sync the block associated with db to disk. |
| 606 * N.B. and XXX: the caller is responsible for making sure that the | |
| 607 * data isn't changing while dmu_sync() is writing it. | |
| 789 | 608 * |
| 609 * Return values: | |
| 610 * | |
| 2237 | 611 * EEXIST: this txg has already been synced, so there's nothing to to. |
| 789 | 612 * The caller should not log the write. |
| 613 * | |
| 614 * ENOENT: the block was dbuf_free_range()'d, so there's nothing to do. | |
| 615 * The caller should not log the write. | |
| 616 * | |
| 2237 | 617 * EALREADY: this block is already in the process of being synced. |
| 618 * The caller should track its progress (somehow). | |
| 789 | 619 * |
| 2237 | 620 * EINPROGRESS: the IO has been initiated. |
| 621 * The caller should log this blkptr in the callback. | |
| 789 | 622 * |
| 2237 | 623 * 0: completed. Sets *bp to the blkptr just written. |
| 624 * The caller should log this blkptr immediately. | |
| 789 | 625 */ |
| 626 int | |
| 2237 | 627 dmu_sync(zio_t *pio, dmu_buf_t *db_fake, |
| 628 blkptr_t *bp, uint64_t txg, dmu_sync_cb_t *done, void *arg) | |
| 789 | 629 { |
| 2237 | 630 dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake; |
| 631 objset_impl_t *os = db->db_objset; | |
| 632 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool; | |
| 789 | 633 tx_state_t *tx = &dp->dp_tx; |
| 2237 | 634 dmu_sync_cbin_t *in; |
| 789 | 635 blkptr_t *blk; |
| 2237 | 636 zbookmark_t zb; |
| 637 uint32_t arc_flag; | |
| 789 | 638 int err; |
| 639 | |
| 640 ASSERT(BP_IS_HOLE(bp)); | |
| 641 ASSERT(txg != 0); | |
| 642 | |
| 2237 | 643 |
| 789 | 644 dprintf("dmu_sync txg=%llu, s,o,q %llu %llu %llu\n", |
| 645 txg, tx->tx_synced_txg, tx->tx_open_txg, tx->tx_quiesced_txg); | |
| 646 | |
| 647 /* | |
| 2237 | 648 * XXX - would be nice if we could do this without suspending... |
| 1544 | 649 */ |
| 2237 | 650 txg_suspend(dp); |
| 1544 | 651 |
| 652 /* | |
| 789 | 653 * If this txg already synced, there's nothing to do. |
| 654 */ | |
| 655 if (txg <= tx->tx_synced_txg) { | |
| 2237 | 656 txg_resume(dp); |
| 789 | 657 /* |
| 658 * If we're running ziltest, we need the blkptr regardless. | |
| 659 */ | |
| 660 if (txg > spa_freeze_txg(dp->dp_spa)) { | |
| 661 /* if db_blkptr == NULL, this was an empty write */ | |
| 662 if (db->db_blkptr) | |
| 663 *bp = *db->db_blkptr; /* structure assignment */ | |
| 664 return (0); | |
| 665 } | |
| 2237 | 666 return (EEXIST); |
| 789 | 667 } |
| 668 | |
| 669 mutex_enter(&db->db_mtx); | |
| 670 | |
| 2237 | 671 blk = db->db_d.db_overridden_by[txg&TXG_MASK]; |
| 672 if (blk == IN_DMU_SYNC) { | |
| 673 /* | |
| 674 * We have already issued a sync write for this buffer. | |
| 675 */ | |
| 676 mutex_exit(&db->db_mtx); | |
| 677 txg_resume(dp); | |
| 678 return (EALREADY); | |
| 679 } else if (blk != NULL) { | |
| 680 /* | |
| 681 * This buffer had already been synced. It could not | |
| 682 * have been dirtied since, or we would have cleared blk. | |
| 683 */ | |
| 684 *bp = *blk; /* structure assignment */ | |
| 789 | 685 mutex_exit(&db->db_mtx); |
| 2237 | 686 txg_resume(dp); |
| 687 return (0); | |
| 688 } | |
| 689 | |
| 690 if (txg == tx->tx_syncing_txg) { | |
| 691 while (db->db_data_pending) { | |
| 692 /* | |
| 693 * IO is in-progress. Wait for it to finish. | |
| 694 * XXX - would be nice to be able to somehow "attach" | |
| 695 * this zio to the parent zio passed in. | |
| 696 */ | |
| 697 cv_wait(&db->db_changed, &db->db_mtx); | |
| 2391 | 698 if (!db->db_data_pending && |
| 699 db->db_blkptr && BP_IS_HOLE(db->db_blkptr)) { | |
| 700 /* | |
| 701 * IO was compressed away | |
| 702 */ | |
| 703 *bp = *db->db_blkptr; /* structure assignment */ | |
| 704 mutex_exit(&db->db_mtx); | |
| 705 txg_resume(dp); | |
| 706 return (0); | |
| 707 } | |
| 2237 | 708 ASSERT(db->db_data_pending || |
| 709 (db->db_blkptr && db->db_blkptr->blk_birth == txg)); | |
| 710 } | |
| 711 | |
| 712 if (db->db_blkptr && db->db_blkptr->blk_birth == txg) { | |
| 713 /* | |
| 714 * IO is already completed. | |
| 715 */ | |
| 716 *bp = *db->db_blkptr; /* structure assignment */ | |
| 717 mutex_exit(&db->db_mtx); | |
| 718 txg_resume(dp); | |
| 719 return (0); | |
| 720 } | |
| 721 } | |
| 722 | |
| 723 if (db->db_d.db_data_old[txg&TXG_MASK] == NULL) { | |
| 724 /* | |
| 725 * This dbuf isn't dirty, must have been free_range'd. | |
| 726 * There's no need to log writes to freed blocks, so we're done. | |
| 727 */ | |
| 728 mutex_exit(&db->db_mtx); | |
| 729 txg_resume(dp); | |
| 789 | 730 return (ENOENT); |
| 731 } | |
| 732 | |
| 2237 | 733 ASSERT(db->db_d.db_overridden_by[txg&TXG_MASK] == NULL); |
| 734 db->db_d.db_overridden_by[txg&TXG_MASK] = IN_DMU_SYNC; | |
| 789 | 735 /* |
| 2237 | 736 * XXX - a little ugly to stash the blkptr in the callback |
| 737 * buffer. We always need to make sure the following is true: | |
| 738 * ASSERT(sizeof(blkptr_t) >= sizeof(dmu_sync_cbin_t)); | |
| 789 | 739 */ |
| 2237 | 740 in = kmem_alloc(sizeof (blkptr_t), KM_SLEEP); |
| 741 in->db = db; | |
| 742 in->txg = txg; | |
| 743 in->done = done; | |
| 744 in->arg = arg; | |
| 745 mutex_exit(&db->db_mtx); | |
| 746 txg_resume(dp); | |
| 789 | 747 |
| 2237 | 748 arc_flag = pio == NULL ? ARC_WAIT : ARC_NOWAIT; |
| 749 zb.zb_objset = os->os_dsl_dataset->ds_object; | |
| 1544 | 750 zb.zb_object = db->db.db_object; |
| 751 zb.zb_level = db->db_level; | |
| 752 zb.zb_blkid = db->db_blkid; | |
| 2237 | 753 err = arc_write(pio, os->os_spa, |
| 754 zio_checksum_select(db->db_dnode->dn_checksum, os->os_checksum), | |
| 755 zio_compress_select(db->db_dnode->dn_compress, os->os_compress), | |
| 756 dmu_get_replication_level(os->os_spa, &zb, db->db_dnode->dn_type), | |
| 757 txg, bp, db->db_d.db_data_old[txg&TXG_MASK], dmu_sync_done, in, | |
| 758 ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, arc_flag, &zb); | |
| 789 | 759 ASSERT(err == 0); |
| 760 | |
| 2237 | 761 return (arc_flag == ARC_NOWAIT ? EINPROGRESS : 0); |
| 789 | 762 } |
| 763 | |
| 764 uint64_t | |
| 765 dmu_object_max_nonzero_offset(objset_t *os, uint64_t object) | |
| 766 { | |
| 1544 | 767 dnode_t *dn; |
| 768 | |
| 769 /* XXX assumes dnode_hold will not get an i/o error */ | |
| 770 (void) dnode_hold(os->os, object, FTAG, &dn); | |
| 789 | 771 uint64_t rv = dnode_max_nonzero_offset(dn); |
| 772 dnode_rele(dn, FTAG); | |
| 773 return (rv); | |
| 774 } | |
| 775 | |
| 776 int | |
| 777 dmu_object_set_blocksize(objset_t *os, uint64_t object, uint64_t size, int ibs, | |
| 778 dmu_tx_t *tx) | |
| 779 { | |
| 1544 | 780 dnode_t *dn; |
| 781 int err; | |
| 782 | |
| 783 err = dnode_hold(os->os, object, FTAG, &dn); | |
| 784 if (err) | |
| 785 return (err); | |
| 786 err = dnode_set_blksz(dn, size, ibs, tx); | |
| 789 | 787 dnode_rele(dn, FTAG); |
| 788 return (err); | |
| 789 } | |
| 790 | |
| 791 void | |
| 792 dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum, | |
| 793 dmu_tx_t *tx) | |
| 794 { | |
| 1544 | 795 dnode_t *dn; |
| 796 | |
| 797 /* XXX assumes dnode_hold will not get an i/o error */ | |
| 798 (void) dnode_hold(os->os, object, FTAG, &dn); | |
| 789 | 799 ASSERT(checksum < ZIO_CHECKSUM_FUNCTIONS); |
| 800 dn->dn_checksum = checksum; | |
| 801 dnode_setdirty(dn, tx); | |
| 802 dnode_rele(dn, FTAG); | |
| 803 } | |
| 804 | |
| 805 void | |
| 806 dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress, | |
| 807 dmu_tx_t *tx) | |
| 808 { | |
| 1544 | 809 dnode_t *dn; |
| 810 | |
| 811 /* XXX assumes dnode_hold will not get an i/o error */ | |
| 812 (void) dnode_hold(os->os, object, FTAG, &dn); | |
| 789 | 813 ASSERT(compress < ZIO_COMPRESS_FUNCTIONS); |
| 814 dn->dn_compress = compress; | |
| 815 dnode_setdirty(dn, tx); | |
| 816 dnode_rele(dn, FTAG); | |
| 817 } | |
| 818 | |
|
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819 /* |
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820 * XXX - eventually, this should take into account per-dataset (or |
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821 * even per-object?) user requests for higher levels of replication. |
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822 */ |
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823 int |
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824 dmu_get_replication_level(spa_t *spa, zbookmark_t *zb, dmu_object_type_t ot) |
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825 { |
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826 int ncopies = 1; |
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827 |
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828 if (dmu_ot[ot].ot_metadata) |
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829 ncopies++; |
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830 if (zb->zb_level != 0) |
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831 ncopies++; |
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832 if (zb->zb_objset == 0 && zb->zb_object == 0) |
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833 ncopies++; |
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834 return (MIN(ncopies, spa_max_replication(spa))); |
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835 } |
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836 |
| 789 | 837 int |
| 838 dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, uint64_t *off) | |
| 839 { | |
| 840 dnode_t *dn; | |
| 841 int i, err; | |
| 842 | |
| 1544 | 843 err = dnode_hold(os->os, object, FTAG, &dn); |
| 844 if (err) | |
| 845 return (err); | |
| 789 | 846 /* |
| 847 * Sync any current changes before | |
| 848 * we go trundling through the block pointers. | |
| 849 */ | |
| 850 for (i = 0; i < TXG_SIZE; i++) { | |
|
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851 if (list_link_active(&dn->dn_dirty_link[i])) |
| 789 | 852 break; |
| 853 } | |
| 854 if (i != TXG_SIZE) { | |
| 855 dnode_rele(dn, FTAG); | |
| 856 txg_wait_synced(dmu_objset_pool(os), 0); | |
| 1544 | 857 err = dnode_hold(os->os, object, FTAG, &dn); |
| 858 if (err) | |
| 859 return (err); | |
| 789 | 860 } |
| 861 | |
| 862 err = dnode_next_offset(dn, hole, off, 1, 1); | |
| 863 dnode_rele(dn, FTAG); | |
| 864 | |
| 865 return (err); | |
| 866 } | |
| 867 | |
| 868 void | |
| 869 dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi) | |
| 870 { | |
| 871 rw_enter(&dn->dn_struct_rwlock, RW_READER); | |
| 872 mutex_enter(&dn->dn_mtx); | |
| 873 | |
| 874 doi->doi_data_block_size = dn->dn_datablksz; | |
| 875 doi->doi_metadata_block_size = dn->dn_indblkshift ? | |
| 876 1ULL << dn->dn_indblkshift : 0; | |
| 877 doi->doi_indirection = dn->dn_nlevels; | |
| 878 doi->doi_checksum = dn->dn_checksum; | |
| 879 doi->doi_compress = dn->dn_compress; | |
| 2082 | 880 doi->doi_physical_blks = (DN_USED_BYTES(dn->dn_phys) + |
| 881 SPA_MINBLOCKSIZE/2) >> SPA_MINBLOCKSHIFT; | |
| 789 | 882 doi->doi_max_block_offset = dn->dn_phys->dn_maxblkid; |
| 883 doi->doi_type = dn->dn_type; | |
| 884 doi->doi_bonus_size = dn->dn_bonuslen; | |
| 885 doi->doi_bonus_type = dn->dn_bonustype; | |
| 886 | |
| 887 mutex_exit(&dn->dn_mtx); | |
| 888 rw_exit(&dn->dn_struct_rwlock); | |
| 889 } | |
| 890 | |
| 891 /* | |
| 892 * Get information on a DMU object. | |
| 893 * If doi is NULL, just indicates whether the object exists. | |
| 894 */ | |
| 895 int | |
| 896 dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi) | |
| 897 { | |
| 1544 | 898 dnode_t *dn; |
| 899 int err = dnode_hold(os->os, object, FTAG, &dn); | |
| 789 | 900 |
| 1544 | 901 if (err) |
| 902 return (err); | |
| 789 | 903 |
| 904 if (doi != NULL) | |
| 905 dmu_object_info_from_dnode(dn, doi); | |
| 906 | |
| 907 dnode_rele(dn, FTAG); | |
| 908 return (0); | |
| 909 } | |
| 910 | |
| 911 /* | |
| 912 * As above, but faster; can be used when you have a held dbuf in hand. | |
| 913 */ | |
| 914 void | |
| 915 dmu_object_info_from_db(dmu_buf_t *db, dmu_object_info_t *doi) | |
| 916 { | |
| 917 dmu_object_info_from_dnode(((dmu_buf_impl_t *)db)->db_dnode, doi); | |
| 918 } | |
| 919 | |
| 920 /* | |
| 921 * Faster still when you only care about the size. | |
| 922 * This is specifically optimized for zfs_getattr(). | |
| 923 */ | |
| 924 void | |
| 925 dmu_object_size_from_db(dmu_buf_t *db, uint32_t *blksize, u_longlong_t *nblk512) | |
| 926 { | |
| 927 dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode; | |
| 928 | |
| 929 *blksize = dn->dn_datablksz; | |
| 2082 | 930 /* add 1 for dnode space */ |
| 931 *nblk512 = ((DN_USED_BYTES(dn->dn_phys) + SPA_MINBLOCKSIZE/2) >> | |
| 932 SPA_MINBLOCKSHIFT) + 1; | |
| 789 | 933 } |
| 934 | |
| 1544 | 935 /* |
| 936 * Given a bookmark, return the name of the dataset, object, and range in | |
| 937 * human-readable format. | |
| 938 */ | |
| 939 int | |
| 2676 | 940 spa_bookmark_name(spa_t *spa, zbookmark_t *zb, nvlist_t *nvl) |
| 1544 | 941 { |
| 942 dsl_pool_t *dp; | |
| 943 dsl_dataset_t *ds = NULL; | |
| 944 objset_t *os = NULL; | |
| 945 dnode_t *dn = NULL; | |
| 946 int err, shift; | |
| 2676 | 947 char dsname[MAXNAMELEN]; |
| 948 char objname[32]; | |
| 949 char range[64]; | |
| 1544 | 950 |
| 951 dp = spa_get_dsl(spa); | |
| 952 if (zb->zb_objset != 0) { | |
| 953 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 954 err = dsl_dataset_open_obj(dp, zb->zb_objset, | |
| 955 NULL, DS_MODE_NONE, FTAG, &ds); | |
| 956 if (err) { | |
| 957 rw_exit(&dp->dp_config_rwlock); | |
| 958 return (err); | |
| 959 } | |
| 960 dsl_dataset_name(ds, dsname); | |
| 961 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 962 rw_exit(&dp->dp_config_rwlock); | |
| 963 | |
| 964 err = dmu_objset_open(dsname, DMU_OST_ANY, DS_MODE_NONE, &os); | |
| 965 if (err) | |
| 966 goto out; | |
| 967 | |
| 968 } else { | |
| 969 dsl_dataset_name(NULL, dsname); | |
| 970 os = dp->dp_meta_objset; | |
| 971 } | |
| 972 | |
| 973 | |
| 974 if (zb->zb_object == DMU_META_DNODE_OBJECT) { | |
| 2676 | 975 (void) strncpy(objname, "mdn", sizeof (objname)); |
| 1544 | 976 } else { |
| 2676 | 977 (void) snprintf(objname, sizeof (objname), "%lld", |
| 1544 | 978 (longlong_t)zb->zb_object); |
| 979 } | |
| 980 | |
| 981 err = dnode_hold(os->os, zb->zb_object, FTAG, &dn); | |
| 982 if (err) | |
| 983 goto out; | |
| 984 | |
| 985 shift = (dn->dn_datablkshift?dn->dn_datablkshift:SPA_MAXBLOCKSHIFT) + | |
| 986 zb->zb_level * (dn->dn_indblkshift - SPA_BLKPTRSHIFT); | |
| 2676 | 987 (void) snprintf(range, sizeof (range), "%llu-%llu", |
| 1544 | 988 (u_longlong_t)(zb->zb_blkid << shift), |
| 989 (u_longlong_t)((zb->zb_blkid+1) << shift)); | |
| 990 | |
| 2676 | 991 if ((err = nvlist_add_string(nvl, ZPOOL_ERR_DATASET, dsname)) != 0 || |
| 992 (err = nvlist_add_string(nvl, ZPOOL_ERR_OBJECT, objname)) != 0 || | |
| 993 (err = nvlist_add_string(nvl, ZPOOL_ERR_RANGE, range)) != 0) | |
| 994 goto out; | |
| 995 | |
| 1544 | 996 out: |
| 997 if (dn) | |
| 998 dnode_rele(dn, FTAG); | |
| 999 if (os && os != dp->dp_meta_objset) | |
| 1000 dmu_objset_close(os); | |
| 1001 return (err); | |
| 1002 } | |
| 1003 | |
| 789 | 1004 void |
| 1005 byteswap_uint64_array(void *vbuf, size_t size) | |
| 1006 { | |
| 1007 uint64_t *buf = vbuf; | |
| 1008 size_t count = size >> 3; | |
| 1009 int i; | |
| 1010 | |
| 1011 ASSERT((size & 7) == 0); | |
| 1012 | |
| 1013 for (i = 0; i < count; i++) | |
| 1014 buf[i] = BSWAP_64(buf[i]); | |
| 1015 } | |
| 1016 | |
| 1017 void | |
| 1018 byteswap_uint32_array(void *vbuf, size_t size) | |
| 1019 { | |
| 1020 uint32_t *buf = vbuf; | |
| 1021 size_t count = size >> 2; | |
| 1022 int i; | |
| 1023 | |
| 1024 ASSERT((size & 3) == 0); | |
| 1025 | |
| 1026 for (i = 0; i < count; i++) | |
| 1027 buf[i] = BSWAP_32(buf[i]); | |
| 1028 } | |
| 1029 | |
| 1030 void | |
| 1031 byteswap_uint16_array(void *vbuf, size_t size) | |
| 1032 { | |
| 1033 uint16_t *buf = vbuf; | |
| 1034 size_t count = size >> 1; | |
| 1035 int i; | |
| 1036 | |
| 1037 ASSERT((size & 1) == 0); | |
| 1038 | |
| 1039 for (i = 0; i < count; i++) | |
| 1040 buf[i] = BSWAP_16(buf[i]); | |
| 1041 } | |
| 1042 | |
| 1043 /* ARGSUSED */ | |
| 1044 void | |
| 1045 byteswap_uint8_array(void *vbuf, size_t size) | |
| 1046 { | |
| 1047 } | |
| 1048 | |
| 1049 void | |
| 1050 dmu_init(void) | |
| 1051 { | |
| 1052 dbuf_init(); | |
| 1053 dnode_init(); | |
| 1054 arc_init(); | |
| 1055 } | |
| 1056 | |
| 1057 void | |
| 1058 dmu_fini(void) | |
| 1059 { | |
| 1060 arc_fini(); | |
| 1061 dnode_fini(); | |
| 1062 dbuf_fini(); | |
| 1063 } |