1 789 ahrens /* 2 789 ahrens * CDDL HEADER START 3 789 ahrens * 4 789 ahrens * The contents of this file are subject to the terms of the 5 1544 eschrock * Common Development and Distribution License (the "License"). 6 1544 eschrock * You may not use this file except in compliance with the License. 7 789 ahrens * 8 789 ahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 789 ahrens * or http://www.opensolaris.org/os/licensing. 10 789 ahrens * See the License for the specific language governing permissions 11 789 ahrens * and limitations under the License. 12 789 ahrens * 13 789 ahrens * When distributing Covered Code, include this CDDL HEADER in each 14 789 ahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 789 ahrens * If applicable, add the following below this CDDL HEADER, with the 16 789 ahrens * fields enclosed by brackets "[]" replaced with your own identifying 17 789 ahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18 789 ahrens * 19 789 ahrens * CDDL HEADER END 20 789 ahrens */ 21 789 ahrens /* 22 8525 Eric * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 789 ahrens * Use is subject to license terms. 24 789 ahrens */ 25 789 ahrens 26 789 ahrens #include <sys/dmu.h> 27 5378 ck153898 #include <sys/dmu_objset.h> 28 789 ahrens #include <sys/dmu_tx.h> 29 789 ahrens #include <sys/dsl_dataset.h> 30 789 ahrens #include <sys/dsl_dir.h> 31 789 ahrens #include <sys/dsl_prop.h> 32 2199 ahrens #include <sys/dsl_synctask.h> 33 4543 marks #include <sys/dsl_deleg.h> 34 789 ahrens #include <sys/spa.h> 35 10922 Jeff #include <sys/metaslab.h> 36 789 ahrens #include <sys/zap.h> 37 789 ahrens #include <sys/zio.h> 38 789 ahrens #include <sys/arc.h> 39 4543 marks #include <sys/sunddi.h> 40 789 ahrens #include "zfs_namecheck.h" 41 789 ahrens 42 5378 ck153898 static uint64_t dsl_dir_space_towrite(dsl_dir_t *dd); 43 4543 marks static void dsl_dir_set_reservation_sync(void *arg1, void *arg2, 44 4543 marks cred_t *cr, dmu_tx_t *tx); 45 789 ahrens 46 789 ahrens 47 789 ahrens /* ARGSUSED */ 48 789 ahrens static void 49 789 ahrens dsl_dir_evict(dmu_buf_t *db, void *arg) 50 789 ahrens { 51 789 ahrens dsl_dir_t *dd = arg; 52 789 ahrens dsl_pool_t *dp = dd->dd_pool; 53 789 ahrens int t; 54 789 ahrens 55 789 ahrens for (t = 0; t < TXG_SIZE; t++) { 56 789 ahrens ASSERT(!txg_list_member(&dp->dp_dirty_dirs, dd, t)); 57 789 ahrens ASSERT(dd->dd_tempreserved[t] == 0); 58 789 ahrens ASSERT(dd->dd_space_towrite[t] == 0); 59 789 ahrens } 60 789 ahrens 61 789 ahrens if (dd->dd_parent) 62 789 ahrens dsl_dir_close(dd->dd_parent, dd); 63 789 ahrens 64 789 ahrens spa_close(dd->dd_pool->dp_spa, dd); 65 789 ahrens 66 789 ahrens /* 67 789 ahrens * The props callback list should be empty since they hold the 68 789 ahrens * dir open. 69 789 ahrens */ 70 789 ahrens list_destroy(&dd->dd_prop_cbs); 71 2856 nd150628 mutex_destroy(&dd->dd_lock); 72 789 ahrens kmem_free(dd, sizeof (dsl_dir_t)); 73 789 ahrens } 74 789 ahrens 75 1544 eschrock int 76 789 ahrens dsl_dir_open_obj(dsl_pool_t *dp, uint64_t ddobj, 77 1544 eschrock const char *tail, void *tag, dsl_dir_t **ddp) 78 789 ahrens { 79 789 ahrens dmu_buf_t *dbuf; 80 789 ahrens dsl_dir_t *dd; 81 1544 eschrock int err; 82 789 ahrens 83 789 ahrens ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || 84 789 ahrens dsl_pool_sync_context(dp)); 85 789 ahrens 86 1544 eschrock err = dmu_bonus_hold(dp->dp_meta_objset, ddobj, tag, &dbuf); 87 1544 eschrock if (err) 88 1544 eschrock return (err); 89 789 ahrens dd = dmu_buf_get_user(dbuf); 90 789 ahrens #ifdef ZFS_DEBUG 91 789 ahrens { 92 789 ahrens dmu_object_info_t doi; 93 789 ahrens dmu_object_info_from_db(dbuf, &doi); 94 928 tabriz ASSERT3U(doi.doi_type, ==, DMU_OT_DSL_DIR); 95 7390 Matthew ASSERT3U(doi.doi_bonus_size, >=, sizeof (dsl_dir_phys_t)); 96 789 ahrens } 97 789 ahrens #endif 98 789 ahrens if (dd == NULL) { 99 789 ahrens dsl_dir_t *winner; 100 789 ahrens 101 789 ahrens dd = kmem_zalloc(sizeof (dsl_dir_t), KM_SLEEP); 102 789 ahrens dd->dd_object = ddobj; 103 789 ahrens dd->dd_dbuf = dbuf; 104 789 ahrens dd->dd_pool = dp; 105 789 ahrens dd->dd_phys = dbuf->db_data; 106 2856 nd150628 mutex_init(&dd->dd_lock, NULL, MUTEX_DEFAULT, NULL); 107 789 ahrens 108 789 ahrens list_create(&dd->dd_prop_cbs, sizeof (dsl_prop_cb_record_t), 109 789 ahrens offsetof(dsl_prop_cb_record_t, cbr_node)); 110 10373 chris 111 10373 chris dsl_dir_snap_cmtime_update(dd); 112 789 ahrens 113 789 ahrens if (dd->dd_phys->dd_parent_obj) { 114 1544 eschrock err = dsl_dir_open_obj(dp, dd->dd_phys->dd_parent_obj, 115 1544 eschrock NULL, dd, &dd->dd_parent); 116 7390 Matthew if (err) 117 7390 Matthew goto errout; 118 789 ahrens if (tail) { 119 789 ahrens #ifdef ZFS_DEBUG 120 789 ahrens uint64_t foundobj; 121 789 ahrens 122 789 ahrens err = zap_lookup(dp->dp_meta_objset, 123 4577 ahrens dd->dd_parent->dd_phys->dd_child_dir_zapobj, 124 789 ahrens tail, sizeof (foundobj), 1, &foundobj); 125 1544 eschrock ASSERT(err || foundobj == ddobj); 126 789 ahrens #endif 127 789 ahrens (void) strcpy(dd->dd_myname, tail); 128 789 ahrens } else { 129 789 ahrens err = zap_value_search(dp->dp_meta_objset, 130 4577 ahrens dd->dd_parent->dd_phys->dd_child_dir_zapobj, 131 4577 ahrens ddobj, 0, dd->dd_myname); 132 1544 eschrock } 133 7390 Matthew if (err) 134 7390 Matthew goto errout; 135 789 ahrens } else { 136 789 ahrens (void) strcpy(dd->dd_myname, spa_name(dp->dp_spa)); 137 789 ahrens } 138 789 ahrens 139 789 ahrens winner = dmu_buf_set_user_ie(dbuf, dd, &dd->dd_phys, 140 789 ahrens dsl_dir_evict); 141 789 ahrens if (winner) { 142 789 ahrens if (dd->dd_parent) 143 789 ahrens dsl_dir_close(dd->dd_parent, dd); 144 2856 nd150628 mutex_destroy(&dd->dd_lock); 145 789 ahrens kmem_free(dd, sizeof (dsl_dir_t)); 146 789 ahrens dd = winner; 147 789 ahrens } else { 148 789 ahrens spa_open_ref(dp->dp_spa, dd); 149 789 ahrens } 150 789 ahrens } 151 789 ahrens 152 789 ahrens /* 153 789 ahrens * The dsl_dir_t has both open-to-close and instantiate-to-evict 154 789 ahrens * holds on the spa. We need the open-to-close holds because 155 789 ahrens * otherwise the spa_refcnt wouldn't change when we open a 156 789 ahrens * dir which the spa also has open, so we could incorrectly 157 789 ahrens * think it was OK to unload/export/destroy the pool. We need 158 789 ahrens * the instantiate-to-evict hold because the dsl_dir_t has a 159 789 ahrens * pointer to the dd_pool, which has a pointer to the spa_t. 160 789 ahrens */ 161 789 ahrens spa_open_ref(dp->dp_spa, tag); 162 789 ahrens ASSERT3P(dd->dd_pool, ==, dp); 163 789 ahrens ASSERT3U(dd->dd_object, ==, ddobj); 164 789 ahrens ASSERT3P(dd->dd_dbuf, ==, dbuf); 165 1544 eschrock *ddp = dd; 166 1544 eschrock return (0); 167 7390 Matthew 168 7390 Matthew errout: 169 7390 Matthew if (dd->dd_parent) 170 7390 Matthew dsl_dir_close(dd->dd_parent, dd); 171 7390 Matthew mutex_destroy(&dd->dd_lock); 172 7390 Matthew kmem_free(dd, sizeof (dsl_dir_t)); 173 7390 Matthew dmu_buf_rele(dbuf, tag); 174 7390 Matthew return (err); 175 7390 Matthew 176 789 ahrens } 177 789 ahrens 178 789 ahrens void 179 789 ahrens dsl_dir_close(dsl_dir_t *dd, void *tag) 180 789 ahrens { 181 789 ahrens dprintf_dd(dd, "%s\n", ""); 182 789 ahrens spa_close(dd->dd_pool->dp_spa, tag); 183 1544 eschrock dmu_buf_rele(dd->dd_dbuf, tag); 184 789 ahrens } 185 789 ahrens 186 2467 ek110237 /* buf must be long enough (MAXNAMELEN + strlen(MOS_DIR_NAME) + 1 should do) */ 187 789 ahrens void 188 789 ahrens dsl_dir_name(dsl_dir_t *dd, char *buf) 189 789 ahrens { 190 789 ahrens if (dd->dd_parent) { 191 789 ahrens dsl_dir_name(dd->dd_parent, buf); 192 789 ahrens (void) strcat(buf, "/"); 193 789 ahrens } else { 194 789 ahrens buf[0] = '\0'; 195 789 ahrens } 196 789 ahrens if (!MUTEX_HELD(&dd->dd_lock)) { 197 789 ahrens /* 198 789 ahrens * recursive mutex so that we can use 199 789 ahrens * dprintf_dd() with dd_lock held 200 789 ahrens */ 201 789 ahrens mutex_enter(&dd->dd_lock); 202 789 ahrens (void) strcat(buf, dd->dd_myname); 203 789 ahrens mutex_exit(&dd->dd_lock); 204 789 ahrens } else { 205 789 ahrens (void) strcat(buf, dd->dd_myname); 206 789 ahrens } 207 3978 mmusante } 208 3978 mmusante 209 3978 mmusante /* Calculate name legnth, avoiding all the strcat calls of dsl_dir_name */ 210 3978 mmusante int 211 3978 mmusante dsl_dir_namelen(dsl_dir_t *dd) 212 3978 mmusante { 213 3978 mmusante int result = 0; 214 3978 mmusante 215 3978 mmusante if (dd->dd_parent) { 216 3978 mmusante /* parent's name + 1 for the "/" */ 217 3978 mmusante result = dsl_dir_namelen(dd->dd_parent) + 1; 218 3978 mmusante } 219 3978 mmusante 220 3978 mmusante if (!MUTEX_HELD(&dd->dd_lock)) { 221 3978 mmusante /* see dsl_dir_name */ 222 3978 mmusante mutex_enter(&dd->dd_lock); 223 3978 mmusante result += strlen(dd->dd_myname); 224 3978 mmusante mutex_exit(&dd->dd_lock); 225 3978 mmusante } else { 226 3978 mmusante result += strlen(dd->dd_myname); 227 3978 mmusante } 228 3978 mmusante 229 3978 mmusante return (result); 230 789 ahrens } 231 789 ahrens 232 789 ahrens static int 233 789 ahrens getcomponent(const char *path, char *component, const char **nextp) 234 789 ahrens { 235 789 ahrens char *p; 236 8924 Richard if ((path == NULL) || (path[0] == '\0')) 237 2731 nd150628 return (ENOENT); 238 789 ahrens /* This would be a good place to reserve some namespace... */ 239 789 ahrens p = strpbrk(path, "/@"); 240 789 ahrens if (p && (p[1] == '/' || p[1] == '@')) { 241 789 ahrens /* two separators in a row */ 242 789 ahrens return (EINVAL); 243 789 ahrens } 244 789 ahrens if (p == NULL || p == path) { 245 789 ahrens /* 246 789 ahrens * if the first thing is an @ or /, it had better be an 247 789 ahrens * @ and it had better not have any more ats or slashes, 248 789 ahrens * and it had better have something after the @. 249 789 ahrens */ 250 789 ahrens if (p != NULL && 251 789 ahrens (p[0] != '@' || strpbrk(path+1, "/@") || p[1] == '\0')) 252 789 ahrens return (EINVAL); 253 789 ahrens if (strlen(path) >= MAXNAMELEN) 254 789 ahrens return (ENAMETOOLONG); 255 789 ahrens (void) strcpy(component, path); 256 789 ahrens p = NULL; 257 789 ahrens } else if (p[0] == '/') { 258 789 ahrens if (p-path >= MAXNAMELEN) 259 789 ahrens return (ENAMETOOLONG); 260 789 ahrens (void) strncpy(component, path, p - path); 261 789 ahrens component[p-path] = '\0'; 262 789 ahrens p++; 263 789 ahrens } else if (p[0] == '@') { 264 789 ahrens /* 265 789 ahrens * if the next separator is an @, there better not be 266 789 ahrens * any more slashes. 267 789 ahrens */ 268 789 ahrens if (strchr(path, '/')) 269 789 ahrens return (EINVAL); 270 789 ahrens if (p-path >= MAXNAMELEN) 271 789 ahrens return (ENAMETOOLONG); 272 789 ahrens (void) strncpy(component, path, p - path); 273 789 ahrens component[p-path] = '\0'; 274 789 ahrens } else { 275 789 ahrens ASSERT(!"invalid p"); 276 789 ahrens } 277 789 ahrens *nextp = p; 278 789 ahrens return (0); 279 789 ahrens } 280 789 ahrens 281 789 ahrens /* 282 789 ahrens * same as dsl_open_dir, ignore the first component of name and use the 283 789 ahrens * spa instead 284 789 ahrens */ 285 1544 eschrock int 286 1544 eschrock dsl_dir_open_spa(spa_t *spa, const char *name, void *tag, 287 1544 eschrock dsl_dir_t **ddp, const char **tailp) 288 789 ahrens { 289 789 ahrens char buf[MAXNAMELEN]; 290 789 ahrens const char *next, *nextnext = NULL; 291 789 ahrens int err; 292 789 ahrens dsl_dir_t *dd; 293 789 ahrens dsl_pool_t *dp; 294 789 ahrens uint64_t ddobj; 295 789 ahrens int openedspa = FALSE; 296 789 ahrens 297 789 ahrens dprintf("%s\n", name); 298 789 ahrens 299 789 ahrens err = getcomponent(name, buf, &next); 300 789 ahrens if (err) 301 1544 eschrock return (err); 302 789 ahrens if (spa == NULL) { 303 789 ahrens err = spa_open(buf, &spa, FTAG); 304 789 ahrens if (err) { 305 789 ahrens dprintf("spa_open(%s) failed\n", buf); 306 1544 eschrock return (err); 307 789 ahrens } 308 789 ahrens openedspa = TRUE; 309 789 ahrens 310 789 ahrens /* XXX this assertion belongs in spa_open */ 311 789 ahrens ASSERT(!dsl_pool_sync_context(spa_get_dsl(spa))); 312 789 ahrens } 313 789 ahrens 314 789 ahrens dp = spa_get_dsl(spa); 315 789 ahrens 316 789 ahrens rw_enter(&dp->dp_config_rwlock, RW_READER); 317 1544 eschrock err = dsl_dir_open_obj(dp, dp->dp_root_dir_obj, NULL, tag, &dd); 318 1544 eschrock if (err) { 319 1544 eschrock rw_exit(&dp->dp_config_rwlock); 320 1544 eschrock if (openedspa) 321 1544 eschrock spa_close(spa, FTAG); 322 1544 eschrock return (err); 323 1544 eschrock } 324 1544 eschrock 325 789 ahrens while (next != NULL) { 326 789 ahrens dsl_dir_t *child_ds; 327 789 ahrens err = getcomponent(next, buf, &nextnext); 328 1544 eschrock if (err) 329 1544 eschrock break; 330 789 ahrens ASSERT(next[0] != '\0'); 331 789 ahrens if (next[0] == '@') 332 789 ahrens break; 333 789 ahrens dprintf("looking up %s in obj%lld\n", 334 789 ahrens buf, dd->dd_phys->dd_child_dir_zapobj); 335 789 ahrens 336 789 ahrens err = zap_lookup(dp->dp_meta_objset, 337 789 ahrens dd->dd_phys->dd_child_dir_zapobj, 338 789 ahrens buf, sizeof (ddobj), 1, &ddobj); 339 1544 eschrock if (err) { 340 1544 eschrock if (err == ENOENT) 341 1544 eschrock err = 0; 342 789 ahrens break; 343 789 ahrens } 344 789 ahrens 345 1544 eschrock err = dsl_dir_open_obj(dp, ddobj, buf, tag, &child_ds); 346 1544 eschrock if (err) 347 1544 eschrock break; 348 789 ahrens dsl_dir_close(dd, tag); 349 789 ahrens dd = child_ds; 350 789 ahrens next = nextnext; 351 789 ahrens } 352 789 ahrens rw_exit(&dp->dp_config_rwlock); 353 1544 eschrock 354 1544 eschrock if (err) { 355 1544 eschrock dsl_dir_close(dd, tag); 356 1544 eschrock if (openedspa) 357 1544 eschrock spa_close(spa, FTAG); 358 1544 eschrock return (err); 359 1544 eschrock } 360 789 ahrens 361 789 ahrens /* 362 789 ahrens * It's an error if there's more than one component left, or 363 789 ahrens * tailp==NULL and there's any component left. 364 789 ahrens */ 365 789 ahrens if (next != NULL && 366 789 ahrens (tailp == NULL || (nextnext && nextnext[0] != '\0'))) { 367 789 ahrens /* bad path name */ 368 789 ahrens dsl_dir_close(dd, tag); 369 789 ahrens dprintf("next=%p (%s) tail=%p\n", next, next?next:"", tailp); 370 1544 eschrock err = ENOENT; 371 789 ahrens } 372 789 ahrens if (tailp) 373 789 ahrens *tailp = next; 374 789 ahrens if (openedspa) 375 789 ahrens spa_close(spa, FTAG); 376 1544 eschrock *ddp = dd; 377 1544 eschrock return (err); 378 789 ahrens } 379 789 ahrens 380 789 ahrens /* 381 789 ahrens * Return the dsl_dir_t, and possibly the last component which couldn't 382 789 ahrens * be found in *tail. Return NULL if the path is bogus, or if 383 789 ahrens * tail==NULL and we couldn't parse the whole name. (*tail)[0] == '@' 384 789 ahrens * means that the last component is a snapshot. 385 789 ahrens */ 386 1544 eschrock int 387 1544 eschrock dsl_dir_open(const char *name, void *tag, dsl_dir_t **ddp, const char **tailp) 388 789 ahrens { 389 1544 eschrock return (dsl_dir_open_spa(NULL, name, tag, ddp, tailp)); 390 789 ahrens } 391 789 ahrens 392 2199 ahrens uint64_t 393 7046 ahrens dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds, const char *name, 394 7046 ahrens dmu_tx_t *tx) 395 789 ahrens { 396 7046 ahrens objset_t *mos = dp->dp_meta_objset; 397 789 ahrens uint64_t ddobj; 398 789 ahrens dsl_dir_phys_t *dsphys; 399 789 ahrens dmu_buf_t *dbuf; 400 789 ahrens 401 928 tabriz ddobj = dmu_object_alloc(mos, DMU_OT_DSL_DIR, 0, 402 928 tabriz DMU_OT_DSL_DIR, sizeof (dsl_dir_phys_t), tx); 403 7046 ahrens if (pds) { 404 7046 ahrens VERIFY(0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, 405 7046 ahrens name, sizeof (uint64_t), 1, &ddobj, tx)); 406 7046 ahrens } else { 407 7046 ahrens /* it's the root dir */ 408 7046 ahrens VERIFY(0 == zap_add(mos, DMU_POOL_DIRECTORY_OBJECT, 409 7046 ahrens DMU_POOL_ROOT_DATASET, sizeof (uint64_t), 1, &ddobj, tx)); 410 7046 ahrens } 411 1544 eschrock VERIFY(0 == dmu_bonus_hold(mos, ddobj, FTAG, &dbuf)); 412 789 ahrens dmu_buf_will_dirty(dbuf, tx); 413 789 ahrens dsphys = dbuf->db_data; 414 789 ahrens 415 789 ahrens dsphys->dd_creation_time = gethrestime_sec(); 416 7046 ahrens if (pds) 417 7046 ahrens dsphys->dd_parent_obj = pds->dd_object; 418 789 ahrens dsphys->dd_props_zapobj = zap_create(mos, 419 789 ahrens DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx); 420 789 ahrens dsphys->dd_child_dir_zapobj = zap_create(mos, 421 885 ahrens DMU_OT_DSL_DIR_CHILD_MAP, DMU_OT_NONE, 0, tx); 422 7390 Matthew if (spa_version(dp->dp_spa) >= SPA_VERSION_USED_BREAKDOWN) 423 7390 Matthew dsphys->dd_flags |= DD_FLAG_USED_BREAKDOWN; 424 1544 eschrock dmu_buf_rele(dbuf, FTAG); 425 789 ahrens 426 2199 ahrens return (ddobj); 427 2199 ahrens } 428 2199 ahrens 429 2199 ahrens /* ARGSUSED */ 430 2199 ahrens int 431 2199 ahrens dsl_dir_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) 432 2199 ahrens { 433 11022 Tom dsl_dataset_t *ds = arg1; 434 11022 Tom dsl_dir_t *dd = ds->ds_dir; 435 2199 ahrens dsl_pool_t *dp = dd->dd_pool; 436 2199 ahrens objset_t *mos = dp->dp_meta_objset; 437 2199 ahrens int err; 438 2199 ahrens uint64_t count; 439 2199 ahrens 440 2199 ahrens /* 441 2199 ahrens * There should be exactly two holds, both from 442 2199 ahrens * dsl_dataset_destroy: one on the dd directory, and one on its 443 2199 ahrens * head ds. Otherwise, someone is trying to lookup something 444 2199 ahrens * inside this dir while we want to destroy it. The 445 2199 ahrens * config_rwlock ensures that nobody else opens it after we 446 2199 ahrens * check. 447 2199 ahrens */ 448 2199 ahrens if (dmu_buf_refcount(dd->dd_dbuf) > 2) 449 2199 ahrens return (EBUSY); 450 2199 ahrens 451 2199 ahrens err = zap_count(mos, dd->dd_phys->dd_child_dir_zapobj, &count); 452 2199 ahrens if (err) 453 2199 ahrens return (err); 454 2199 ahrens if (count != 0) 455 2199 ahrens return (EEXIST); 456 789 ahrens 457 789 ahrens return (0); 458 789 ahrens } 459 789 ahrens 460 2199 ahrens void 461 4543 marks dsl_dir_destroy_sync(void *arg1, void *tag, cred_t *cr, dmu_tx_t *tx) 462 789 ahrens { 463 11022 Tom dsl_dataset_t *ds = arg1; 464 11022 Tom dsl_dir_t *dd = ds->ds_dir; 465 2199 ahrens objset_t *mos = dd->dd_pool->dp_meta_objset; 466 11022 Tom dsl_prop_setarg_t psa; 467 11022 Tom uint64_t value = 0; 468 11022 Tom uint64_t obj; 469 7390 Matthew dd_used_t t; 470 789 ahrens 471 2199 ahrens ASSERT(RW_WRITE_HELD(&dd->dd_pool->dp_config_rwlock)); 472 789 ahrens ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); 473 789 ahrens 474 2199 ahrens /* Remove our reservation. */ 475 11022 Tom dsl_prop_setarg_init_uint64(&psa, "reservation", 476 11022 Tom (ZPROP_SRC_NONE | ZPROP_SRC_LOCAL | ZPROP_SRC_RECEIVED), 477 11022 Tom &value); 478 11022 Tom psa.psa_effective_value = 0; /* predict default value */ 479 11022 Tom 480 11022 Tom dsl_dir_set_reservation_sync(ds, &psa, cr, tx); 481 11022 Tom 482 7390 Matthew ASSERT3U(dd->dd_phys->dd_used_bytes, ==, 0); 483 789 ahrens ASSERT3U(dd->dd_phys->dd_reserved, ==, 0); 484 7390 Matthew for (t = 0; t < DD_USED_NUM; t++) 485 7390 Matthew ASSERT3U(dd->dd_phys->dd_used_breakdown[t], ==, 0); 486 789 ahrens 487 2199 ahrens VERIFY(0 == zap_destroy(mos, dd->dd_phys->dd_child_dir_zapobj, tx)); 488 2199 ahrens VERIFY(0 == zap_destroy(mos, dd->dd_phys->dd_props_zapobj, tx)); 489 4543 marks VERIFY(0 == dsl_deleg_destroy(mos, dd->dd_phys->dd_deleg_zapobj, tx)); 490 2199 ahrens VERIFY(0 == zap_remove(mos, 491 2199 ahrens dd->dd_parent->dd_phys->dd_child_dir_zapobj, dd->dd_myname, tx)); 492 789 ahrens 493 2199 ahrens obj = dd->dd_object; 494 2199 ahrens dsl_dir_close(dd, tag); 495 2199 ahrens VERIFY(0 == dmu_object_free(mos, obj, tx)); 496 789 ahrens } 497 789 ahrens 498 7046 ahrens boolean_t 499 7046 ahrens dsl_dir_is_clone(dsl_dir_t *dd) 500 789 ahrens { 501 7046 ahrens return (dd->dd_phys->dd_origin_obj && 502 7046 ahrens (dd->dd_pool->dp_origin_snap == NULL || 503 7046 ahrens dd->dd_phys->dd_origin_obj != 504 7046 ahrens dd->dd_pool->dp_origin_snap->ds_object)); 505 789 ahrens } 506 789 ahrens 507 789 ahrens void 508 2885 ahrens dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv) 509 789 ahrens { 510 789 ahrens mutex_enter(&dd->dd_lock); 511 7390 Matthew dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, 512 7390 Matthew dd->dd_phys->dd_used_bytes); 513 5378 ck153898 dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_QUOTA, dd->dd_phys->dd_quota); 514 2885 ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_RESERVATION, 515 2885 ahrens dd->dd_phys->dd_reserved); 516 2885 ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, 517 2885 ahrens dd->dd_phys->dd_compressed_bytes == 0 ? 100 : 518 2885 ahrens (dd->dd_phys->dd_uncompressed_bytes * 100 / 519 2885 ahrens dd->dd_phys->dd_compressed_bytes)); 520 7390 Matthew if (dd->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN) { 521 7390 Matthew dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDSNAP, 522 7390 Matthew dd->dd_phys->dd_used_breakdown[DD_USED_SNAP]); 523 7390 Matthew dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDDS, 524 7390 Matthew dd->dd_phys->dd_used_breakdown[DD_USED_HEAD]); 525 7390 Matthew dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDREFRESERV, 526 7390 Matthew dd->dd_phys->dd_used_breakdown[DD_USED_REFRSRV]); 527 7390 Matthew dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDCHILD, 528 7390 Matthew dd->dd_phys->dd_used_breakdown[DD_USED_CHILD] + 529 7390 Matthew dd->dd_phys->dd_used_breakdown[DD_USED_CHILD_RSRV]); 530 7390 Matthew } 531 789 ahrens mutex_exit(&dd->dd_lock); 532 789 ahrens 533 5446 ahrens rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); 534 7046 ahrens if (dsl_dir_is_clone(dd)) { 535 789 ahrens dsl_dataset_t *ds; 536 2885 ahrens char buf[MAXNAMELEN]; 537 789 ahrens 538 6689 maybee VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool, 539 6689 maybee dd->dd_phys->dd_origin_obj, FTAG, &ds)); 540 2885 ahrens dsl_dataset_name(ds, buf); 541 6689 maybee dsl_dataset_rele(ds, FTAG); 542 2885 ahrens dsl_prop_nvlist_add_string(nv, ZFS_PROP_ORIGIN, buf); 543 789 ahrens } 544 5446 ahrens rw_exit(&dd->dd_pool->dp_config_rwlock); 545 789 ahrens } 546 789 ahrens 547 789 ahrens void 548 789 ahrens dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx) 549 789 ahrens { 550 789 ahrens dsl_pool_t *dp = dd->dd_pool; 551 789 ahrens 552 789 ahrens ASSERT(dd->dd_phys); 553 789 ahrens 554 789 ahrens if (txg_list_add(&dp->dp_dirty_dirs, dd, tx->tx_txg) == 0) { 555 789 ahrens /* up the hold count until we can be written out */ 556 789 ahrens dmu_buf_add_ref(dd->dd_dbuf, dd); 557 789 ahrens } 558 789 ahrens } 559 789 ahrens 560 789 ahrens static int64_t 561 789 ahrens parent_delta(dsl_dir_t *dd, uint64_t used, int64_t delta) 562 789 ahrens { 563 789 ahrens uint64_t old_accounted = MAX(used, dd->dd_phys->dd_reserved); 564 789 ahrens uint64_t new_accounted = MAX(used + delta, dd->dd_phys->dd_reserved); 565 789 ahrens return (new_accounted - old_accounted); 566 789 ahrens } 567 789 ahrens 568 789 ahrens void 569 789 ahrens dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx) 570 789 ahrens { 571 789 ahrens ASSERT(dmu_tx_is_syncing(tx)); 572 789 ahrens 573 789 ahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 574 789 ahrens 575 789 ahrens mutex_enter(&dd->dd_lock); 576 789 ahrens ASSERT3U(dd->dd_tempreserved[tx->tx_txg&TXG_MASK], ==, 0); 577 789 ahrens dprintf_dd(dd, "txg=%llu towrite=%lluK\n", tx->tx_txg, 578 789 ahrens dd->dd_space_towrite[tx->tx_txg&TXG_MASK] / 1024); 579 789 ahrens dd->dd_space_towrite[tx->tx_txg&TXG_MASK] = 0; 580 789 ahrens mutex_exit(&dd->dd_lock); 581 789 ahrens 582 789 ahrens /* release the hold from dsl_dir_dirty */ 583 1544 eschrock dmu_buf_rele(dd->dd_dbuf, dd); 584 789 ahrens } 585 789 ahrens 586 789 ahrens static uint64_t 587 5378 ck153898 dsl_dir_space_towrite(dsl_dir_t *dd) 588 789 ahrens { 589 5378 ck153898 uint64_t space = 0; 590 789 ahrens int i; 591 789 ahrens 592 789 ahrens ASSERT(MUTEX_HELD(&dd->dd_lock)); 593 789 ahrens 594 789 ahrens for (i = 0; i < TXG_SIZE; i++) { 595 789 ahrens space += dd->dd_space_towrite[i&TXG_MASK]; 596 789 ahrens ASSERT3U(dd->dd_space_towrite[i&TXG_MASK], >=, 0); 597 789 ahrens } 598 789 ahrens return (space); 599 789 ahrens } 600 789 ahrens 601 789 ahrens /* 602 789 ahrens * How much space would dd have available if ancestor had delta applied 603 789 ahrens * to it? If ondiskonly is set, we're only interested in what's 604 789 ahrens * on-disk, not estimated pending changes. 605 789 ahrens */ 606 2885 ahrens uint64_t 607 789 ahrens dsl_dir_space_available(dsl_dir_t *dd, 608 789 ahrens dsl_dir_t *ancestor, int64_t delta, int ondiskonly) 609 789 ahrens { 610 789 ahrens uint64_t parentspace, myspace, quota, used; 611 789 ahrens 612 789 ahrens /* 613 789 ahrens * If there are no restrictions otherwise, assume we have 614 789 ahrens * unlimited space available. 615 789 ahrens */ 616 789 ahrens quota = UINT64_MAX; 617 789 ahrens parentspace = UINT64_MAX; 618 789 ahrens 619 789 ahrens if (dd->dd_parent != NULL) { 620 789 ahrens parentspace = dsl_dir_space_available(dd->dd_parent, 621 789 ahrens ancestor, delta, ondiskonly); 622 789 ahrens } 623 789 ahrens 624 789 ahrens mutex_enter(&dd->dd_lock); 625 789 ahrens if (dd->dd_phys->dd_quota != 0) 626 789 ahrens quota = dd->dd_phys->dd_quota; 627 7390 Matthew used = dd->dd_phys->dd_used_bytes; 628 5378 ck153898 if (!ondiskonly) 629 5378 ck153898 used += dsl_dir_space_towrite(dd); 630 789 ahrens 631 789 ahrens if (dd->dd_parent == NULL) { 632 2082 eschrock uint64_t poolsize = dsl_pool_adjustedsize(dd->dd_pool, FALSE); 633 789 ahrens quota = MIN(quota, poolsize); 634 789 ahrens } 635 789 ahrens 636 789 ahrens if (dd->dd_phys->dd_reserved > used && parentspace != UINT64_MAX) { 637 789 ahrens /* 638 789 ahrens * We have some space reserved, in addition to what our 639 789 ahrens * parent gave us. 640 789 ahrens */ 641 789 ahrens parentspace += dd->dd_phys->dd_reserved - used; 642 7390 Matthew } 643 7390 Matthew 644 7390 Matthew if (dd == ancestor) { 645 7390 Matthew ASSERT(delta <= 0); 646 7390 Matthew ASSERT(used >= -delta); 647 7390 Matthew used += delta; 648 7390 Matthew if (parentspace != UINT64_MAX) 649 7390 Matthew parentspace -= delta; 650 789 ahrens } 651 789 ahrens 652 789 ahrens if (used > quota) { 653 789 ahrens /* over quota */ 654 789 ahrens myspace = 0; 655 2082 eschrock 656 2082 eschrock /* 657 2082 eschrock * While it's OK to be a little over quota, if 658 2082 eschrock * we think we are using more space than there 659 2082 eschrock * is in the pool (which is already 1.6% more than 660 2082 eschrock * dsl_pool_adjustedsize()), something is very 661 2082 eschrock * wrong. 662 2082 eschrock */ 663 10974 Jeff ASSERT3U(used, <=, spa_get_dspace(dd->dd_pool->dp_spa)); 664 789 ahrens } else { 665 789 ahrens /* 666 2082 eschrock * the lesser of the space provided by our parent and 667 2082 eschrock * the space left in our quota 668 789 ahrens */ 669 789 ahrens myspace = MIN(parentspace, quota - used); 670 789 ahrens } 671 789 ahrens 672 789 ahrens mutex_exit(&dd->dd_lock); 673 789 ahrens 674 789 ahrens return (myspace); 675 789 ahrens } 676 789 ahrens 677 789 ahrens struct tempreserve { 678 789 ahrens list_node_t tr_node; 679 6245 maybee dsl_pool_t *tr_dp; 680 789 ahrens dsl_dir_t *tr_ds; 681 789 ahrens uint64_t tr_size; 682 789 ahrens }; 683 789 ahrens 684 789 ahrens static int 685 5378 ck153898 dsl_dir_tempreserve_impl(dsl_dir_t *dd, uint64_t asize, boolean_t netfree, 686 5378 ck153898 boolean_t ignorequota, boolean_t checkrefquota, list_t *tr_list, 687 6300 ck153898 dmu_tx_t *tx, boolean_t first) 688 789 ahrens { 689 789 ahrens uint64_t txg = tx->tx_txg; 690 5378 ck153898 uint64_t est_inflight, used_on_disk, quota, parent_rsrv; 691 10921 Tim uint64_t deferred = 0; 692 5378 ck153898 struct tempreserve *tr; 693 10921 Tim int retval = EDQUOT; 694 789 ahrens int txgidx = txg & TXG_MASK; 695 789 ahrens int i; 696 5831 ck153898 uint64_t ref_rsrv = 0; 697 789 ahrens 698 789 ahrens ASSERT3U(txg, !=, 0); 699 5378 ck153898 ASSERT3S(asize, >, 0); 700 789 ahrens 701 789 ahrens mutex_enter(&dd->dd_lock); 702 5378 ck153898 703 789 ahrens /* 704 789 ahrens * Check against the dsl_dir's quota. We don't add in the delta 705 789 ahrens * when checking for over-quota because they get one free hit. 706 789 ahrens */ 707 5378 ck153898 est_inflight = dsl_dir_space_towrite(dd); 708 789 ahrens for (i = 0; i < TXG_SIZE; i++) 709 5378 ck153898 est_inflight += dd->dd_tempreserved[i]; 710 7390 Matthew used_on_disk = dd->dd_phys->dd_used_bytes; 711 789 ahrens 712 4709 maybee /* 713 6300 ck153898 * On the first iteration, fetch the dataset's used-on-disk and 714 6300 ck153898 * refreservation values. Also, if checkrefquota is set, test if 715 6300 ck153898 * allocating this space would exceed the dataset's refquota. 716 4709 maybee */ 717 6300 ck153898 if (first && tx->tx_objset) { 718 5392 maybee int error; 719 10298 Matthew dsl_dataset_t *ds = tx->tx_objset->os_dsl_dataset; 720 5392 maybee 721 5378 ck153898 error = dsl_dataset_check_quota(ds, checkrefquota, 722 5831 ck153898 asize, est_inflight, &used_on_disk, &ref_rsrv); 723 5378 ck153898 if (error) { 724 5378 ck153898 mutex_exit(&dd->dd_lock); 725 5378 ck153898 return (error); 726 5378 ck153898 } 727 5378 ck153898 } 728 5378 ck153898 729 5378 ck153898 /* 730 5378 ck153898 * If this transaction will result in a net free of space, 731 5378 ck153898 * we want to let it through. 732 5378 ck153898 */ 733 5378 ck153898 if (ignorequota || netfree || dd->dd_phys->dd_quota == 0) 734 4709 maybee quota = UINT64_MAX; 735 4709 maybee else 736 789 ahrens quota = dd->dd_phys->dd_quota; 737 789 ahrens 738 789 ahrens /* 739 10921 Tim * Adjust the quota against the actual pool size at the root 740 10921 Tim * minus any outstanding deferred frees. 741 4709 maybee * To ensure that it's possible to remove files from a full 742 4709 maybee * pool without inducing transient overcommits, we throttle 743 789 ahrens * netfree transactions against a quota that is slightly larger, 744 789 ahrens * but still within the pool's allocation slop. In cases where 745 789 ahrens * we're very close to full, this will allow a steady trickle of 746 789 ahrens * removes to get through. 747 789 ahrens */ 748 4944 maybee if (dd->dd_parent == NULL) { 749 10922 Jeff spa_t *spa = dd->dd_pool->dp_spa; 750 789 ahrens uint64_t poolsize = dsl_pool_adjustedsize(dd->dd_pool, netfree); 751 10922 Jeff deferred = metaslab_class_get_deferred(spa_normal_class(spa)); 752 10921 Tim if (poolsize - deferred < quota) { 753 10921 Tim quota = poolsize - deferred; 754 10921 Tim retval = ENOSPC; 755 789 ahrens } 756 789 ahrens } 757 789 ahrens 758 789 ahrens /* 759 789 ahrens * If they are requesting more space, and our current estimate 760 5378 ck153898 * is over quota, they get to try again unless the actual 761 1544 eschrock * on-disk is over quota and there are no pending changes (which 762 1544 eschrock * may free up space for us). 763 789 ahrens */ 764 10921 Tim if (used_on_disk + est_inflight >= quota) { 765 10921 Tim if (est_inflight > 0 || used_on_disk < quota || 766 10921 Tim (retval == ENOSPC && used_on_disk < quota + deferred)) 767 10921 Tim retval = ERESTART; 768 5378 ck153898 dprintf_dd(dd, "failing: used=%lluK inflight = %lluK " 769 789 ahrens "quota=%lluK tr=%lluK err=%d\n", 770 5378 ck153898 used_on_disk>>10, est_inflight>>10, 771 10921 Tim quota>>10, asize>>10, retval); 772 789 ahrens mutex_exit(&dd->dd_lock); 773 10921 Tim return (retval); 774 789 ahrens } 775 789 ahrens 776 789 ahrens /* We need to up our estimated delta before dropping dd_lock */ 777 789 ahrens dd->dd_tempreserved[txgidx] += asize; 778 789 ahrens 779 5831 ck153898 parent_rsrv = parent_delta(dd, used_on_disk + est_inflight, 780 5831 ck153898 asize - ref_rsrv); 781 789 ahrens mutex_exit(&dd->dd_lock); 782 789 ahrens 783 6245 maybee tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP); 784 789 ahrens tr->tr_ds = dd; 785 789 ahrens tr->tr_size = asize; 786 789 ahrens list_insert_tail(tr_list, tr); 787 789 ahrens 788 789 ahrens /* see if it's OK with our parent */ 789 4944 maybee if (dd->dd_parent && parent_rsrv) { 790 4944 maybee boolean_t ismos = (dd->dd_phys->dd_head_dataset_obj == 0); 791 4944 maybee 792 789 ahrens return (dsl_dir_tempreserve_impl(dd->dd_parent, 793 6300 ck153898 parent_rsrv, netfree, ismos, TRUE, tr_list, tx, FALSE)); 794 789 ahrens } else { 795 789 ahrens return (0); 796 789 ahrens } 797 789 ahrens } 798 789 ahrens 799 789 ahrens /* 800 789 ahrens * Reserve space in this dsl_dir, to be used in this tx's txg. 801 5378 ck153898 * After the space has been dirtied (and dsl_dir_willuse_space() 802 5378 ck153898 * has been called), the reservation should be canceled, using 803 5378 ck153898 * dsl_dir_tempreserve_clear(). 804 789 ahrens */ 805 789 ahrens int 806 5378 ck153898 dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t lsize, uint64_t asize, 807 5378 ck153898 uint64_t fsize, uint64_t usize, void **tr_cookiep, dmu_tx_t *tx) 808 789 ahrens { 809 6245 maybee int err; 810 789 ahrens list_t *tr_list; 811 789 ahrens 812 5378 ck153898 if (asize == 0) { 813 5378 ck153898 *tr_cookiep = NULL; 814 5378 ck153898 return (0); 815 5378 ck153898 } 816 5378 ck153898 817 789 ahrens tr_list = kmem_alloc(sizeof (list_t), KM_SLEEP); 818 789 ahrens list_create(tr_list, sizeof (struct tempreserve), 819 789 ahrens offsetof(struct tempreserve, tr_node)); 820 5378 ck153898 ASSERT3S(asize, >, 0); 821 1544 eschrock ASSERT3S(fsize, >=, 0); 822 789 ahrens 823 6245 maybee err = arc_tempreserve_space(lsize, tx->tx_txg); 824 6245 maybee if (err == 0) { 825 6245 maybee struct tempreserve *tr; 826 6245 maybee 827 6245 maybee tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP); 828 6245 maybee tr->tr_size = lsize; 829 6245 maybee list_insert_tail(tr_list, tr); 830 6245 maybee 831 6245 maybee err = dsl_pool_tempreserve_space(dd->dd_pool, asize, tx); 832 6245 maybee } else { 833 6245 maybee if (err == EAGAIN) { 834 6245 maybee txg_delay(dd->dd_pool, tx->tx_txg, 1); 835 6245 maybee err = ERESTART; 836 6245 maybee } 837 6245 maybee dsl_pool_memory_pressure(dd->dd_pool); 838 6245 maybee } 839 789 ahrens 840 789 ahrens if (err == 0) { 841 789 ahrens struct tempreserve *tr; 842 789 ahrens 843 6245 maybee tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP); 844 6245 maybee tr->tr_dp = dd->dd_pool; 845 6245 maybee tr->tr_size = asize; 846 6245 maybee list_insert_tail(tr_list, tr); 847 6245 maybee 848 6245 maybee err = dsl_dir_tempreserve_impl(dd, asize, fsize >= asize, 849 6300 ck153898 FALSE, asize > usize, tr_list, tx, TRUE); 850 789 ahrens } 851 789 ahrens 852 789 ahrens if (err) 853 789 ahrens dsl_dir_tempreserve_clear(tr_list, tx); 854 789 ahrens else 855 789 ahrens *tr_cookiep = tr_list; 856 6245 maybee 857 789 ahrens return (err); 858 789 ahrens } 859 789 ahrens 860 789 ahrens /* 861 789 ahrens * Clear a temporary reservation that we previously made with 862 789 ahrens * dsl_dir_tempreserve_space(). 863 789 ahrens */ 864 789 ahrens void 865 789 ahrens dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx) 866 789 ahrens { 867 789 ahrens int txgidx = tx->tx_txg & TXG_MASK; 868 789 ahrens list_t *tr_list = tr_cookie; 869 789 ahrens struct tempreserve *tr; 870 789 ahrens 871 789 ahrens ASSERT3U(tx->tx_txg, !=, 0); 872 789 ahrens 873 5378 ck153898 if (tr_cookie == NULL) 874 5378 ck153898 return; 875 5378 ck153898 876 789 ahrens while (tr = list_head(tr_list)) { 877 6245 maybee if (tr->tr_dp) { 878 6245 maybee dsl_pool_tempreserve_clear(tr->tr_dp, tr->tr_size, tx); 879 6245 maybee } else if (tr->tr_ds) { 880 789 ahrens mutex_enter(&tr->tr_ds->dd_lock); 881 789 ahrens ASSERT3U(tr->tr_ds->dd_tempreserved[txgidx], >=, 882 789 ahrens tr->tr_size); 883 789 ahrens tr->tr_ds->dd_tempreserved[txgidx] -= tr->tr_size; 884 789 ahrens mutex_exit(&tr->tr_ds->dd_lock); 885 6245 maybee } else { 886 6245 maybee arc_tempreserve_clear(tr->tr_size); 887 789 ahrens } 888 789 ahrens list_remove(tr_list, tr); 889 789 ahrens kmem_free(tr, sizeof (struct tempreserve)); 890 789 ahrens } 891 789 ahrens 892 789 ahrens kmem_free(tr_list, sizeof (list_t)); 893 789 ahrens } 894 789 ahrens 895 6245 maybee static void 896 6245 maybee dsl_dir_willuse_space_impl(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx) 897 789 ahrens { 898 789 ahrens int64_t parent_space; 899 789 ahrens uint64_t est_used; 900 789 ahrens 901 789 ahrens mutex_enter(&dd->dd_lock); 902 789 ahrens if (space > 0) 903 789 ahrens dd->dd_space_towrite[tx->tx_txg & TXG_MASK] += space; 904 789 ahrens 905 7390 Matthew est_used = dsl_dir_space_towrite(dd) + dd->dd_phys->dd_used_bytes; 906 789 ahrens parent_space = parent_delta(dd, est_used, space); 907 789 ahrens mutex_exit(&dd->dd_lock); 908 789 ahrens 909 789 ahrens /* Make sure that we clean up dd_space_to* */ 910 789 ahrens dsl_dir_dirty(dd, tx); 911 789 ahrens 912 789 ahrens /* XXX this is potentially expensive and unnecessary... */ 913 789 ahrens if (parent_space && dd->dd_parent) 914 6245 maybee dsl_dir_willuse_space_impl(dd->dd_parent, parent_space, tx); 915 6245 maybee } 916 6245 maybee 917 6245 maybee /* 918 6245 maybee * Call in open context when we think we're going to write/free space, 919 6245 maybee * eg. when dirtying data. Be conservative (ie. OK to write less than 920 6245 maybee * this or free more than this, but don't write more or free less). 921 6245 maybee */ 922 6245 maybee void 923 6245 maybee dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx) 924 6245 maybee { 925 6245 maybee dsl_pool_willuse_space(dd->dd_pool, space, tx); 926 6245 maybee dsl_dir_willuse_space_impl(dd, space, tx); 927 789 ahrens } 928 789 ahrens 929 789 ahrens /* call from syncing context when we actually write/free space for this dd */ 930 789 ahrens void 931 7390 Matthew dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type, 932 789 ahrens int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx) 933 789 ahrens { 934 789 ahrens int64_t accounted_delta; 935 7595 Matthew boolean_t needlock = !MUTEX_HELD(&dd->dd_lock); 936 789 ahrens 937 789 ahrens ASSERT(dmu_tx_is_syncing(tx)); 938 7390 Matthew ASSERT(type < DD_USED_NUM); 939 789 ahrens 940 789 ahrens dsl_dir_dirty(dd, tx); 941 789 ahrens 942 7595 Matthew if (needlock) 943 7595 Matthew mutex_enter(&dd->dd_lock); 944 7390 Matthew accounted_delta = parent_delta(dd, dd->dd_phys->dd_used_bytes, used); 945 7390 Matthew ASSERT(used >= 0 || dd->dd_phys->dd_used_bytes >= -used); 946 789 ahrens ASSERT(compressed >= 0 || 947 789 ahrens dd->dd_phys->dd_compressed_bytes >= -compressed); 948 789 ahrens ASSERT(uncompressed >= 0 || 949 789 ahrens dd->dd_phys->dd_uncompressed_bytes >= -uncompressed); 950 7390 Matthew dd->dd_phys->dd_used_bytes += used; 951 789 ahrens dd->dd_phys->dd_uncompressed_bytes += uncompressed; 952 789 ahrens dd->dd_phys->dd_compressed_bytes += compressed; 953 7390 Matthew 954 7390 Matthew if (dd->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN) { 955 7390 Matthew ASSERT(used > 0 || 956 7390 Matthew dd->dd_phys->dd_used_breakdown[type] >= -used); 957 7390 Matthew dd->dd_phys->dd_used_breakdown[type] += used; 958 7390 Matthew #ifdef DEBUG 959 7390 Matthew dd_used_t t; 960 7390 Matthew uint64_t u = 0; 961 7390 Matthew for (t = 0; t < DD_USED_NUM; t++) 962 7390 Matthew u += dd->dd_phys->dd_used_breakdown[t]; 963 7390 Matthew ASSERT3U(u, ==, dd->dd_phys->dd_used_bytes); 964 7390 Matthew #endif 965 7390 Matthew } 966 7595 Matthew if (needlock) 967 7595 Matthew mutex_exit(&dd->dd_lock); 968 789 ahrens 969 789 ahrens if (dd->dd_parent != NULL) { 970 7390 Matthew dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD, 971 789 ahrens accounted_delta, compressed, uncompressed, tx); 972 7390 Matthew dsl_dir_transfer_space(dd->dd_parent, 973 7390 Matthew used - accounted_delta, 974 7390 Matthew DD_USED_CHILD_RSRV, DD_USED_CHILD, tx); 975 789 ahrens } 976 789 ahrens } 977 7390 Matthew 978 7390 Matthew void 979 7390 Matthew dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta, 980 7390 Matthew dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx) 981 7390 Matthew { 982 7595 Matthew boolean_t needlock = !MUTEX_HELD(&dd->dd_lock); 983 7595 Matthew 984 7390 Matthew ASSERT(dmu_tx_is_syncing(tx)); 985 7390 Matthew ASSERT(oldtype < DD_USED_NUM); 986 7390 Matthew ASSERT(newtype < DD_USED_NUM); 987 7390 Matthew 988 7390 Matthew if (delta == 0 || !(dd->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN)) 989 7390 Matthew return; 990 7390 Matthew 991 7390 Matthew dsl_dir_dirty(dd, tx); 992 7595 Matthew if (needlock) 993 7595 Matthew mutex_enter(&dd->dd_lock); 994 7390 Matthew ASSERT(delta > 0 ? 995 7390 Matthew dd->dd_phys->dd_used_breakdown[oldtype] >= delta : 996 7390 Matthew dd->dd_phys->dd_used_breakdown[newtype] >= -delta); 997 7390 Matthew ASSERT(dd->dd_phys->dd_used_bytes >= ABS(delta)); 998 7390 Matthew dd->dd_phys->dd_used_breakdown[oldtype] -= delta; 999 7390 Matthew dd->dd_phys->dd_used_breakdown[newtype] += delta; 1000 7595 Matthew if (needlock) 1001 7595 Matthew mutex_exit(&dd->dd_lock); 1002 7390 Matthew } 1003 789 ahrens 1004 789 ahrens static int 1005 2199 ahrens dsl_dir_set_quota_check(void *arg1, void *arg2, dmu_tx_t *tx) 1006 789 ahrens { 1007 11022 Tom dsl_dataset_t *ds = arg1; 1008 11022 Tom dsl_dir_t *dd = ds->ds_dir; 1009 11022 Tom dsl_prop_setarg_t *psa = arg2; 1010 11022 Tom int err; 1011 2199 ahrens uint64_t towrite; 1012 2199 ahrens 1013 11022 Tom if ((err = dsl_prop_predict_sync(ds->ds_dir, psa)) != 0) 1014 11022 Tom return (err); 1015 11022 Tom 1016 11022 Tom if (psa->psa_effective_value == 0) 1017 2199 ahrens return (0); 1018 2199 ahrens 1019 2199 ahrens mutex_enter(&dd->dd_lock); 1020 2199 ahrens /* 1021 2199 ahrens * If we are doing the preliminary check in open context, and 1022 2199 ahrens * there are pending changes, then don't fail it, since the 1023 5378 ck153898 * pending changes could under-estimate the amount of space to be 1024 2199 ahrens * freed up. 1025 2199 ahrens */ 1026 5378 ck153898 towrite = dsl_dir_space_towrite(dd); 1027 2199 ahrens if ((dmu_tx_is_syncing(tx) || towrite == 0) && 1028 11022 Tom (psa->psa_effective_value < dd->dd_phys->dd_reserved || 1029 11022 Tom psa->psa_effective_value < dd->dd_phys->dd_used_bytes + towrite)) { 1030 2199 ahrens err = ENOSPC; 1031 2199 ahrens } 1032 2199 ahrens mutex_exit(&dd->dd_lock); 1033 2199 ahrens return (err); 1034 2199 ahrens } 1035 2199 ahrens 1036 11022 Tom extern void dsl_prop_set_sync(void *, void *, cred_t *, dmu_tx_t *); 1037 11022 Tom 1038 4543 marks /* ARGSUSED */ 1039 2199 ahrens static void 1040 4543 marks dsl_dir_set_quota_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 1041 2199 ahrens { 1042 11022 Tom dsl_dataset_t *ds = arg1; 1043 11022 Tom dsl_dir_t *dd = ds->ds_dir; 1044 11022 Tom dsl_prop_setarg_t *psa = arg2; 1045 11022 Tom uint64_t effective_value = psa->psa_effective_value; 1046 11022 Tom 1047 11022 Tom dsl_prop_set_sync(ds, psa, cr, tx); 1048 11022 Tom DSL_PROP_CHECK_PREDICTION(dd, psa); 1049 789 ahrens 1050 789 ahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 1051 789 ahrens 1052 789 ahrens mutex_enter(&dd->dd_lock); 1053 11022 Tom dd->dd_phys->dd_quota = effective_value; 1054 789 ahrens mutex_exit(&dd->dd_lock); 1055 4543 marks 1056 4543 marks spa_history_internal_log(LOG_DS_QUOTA, dd->dd_pool->dp_spa, 1057 4543 marks tx, cr, "%lld dataset = %llu ", 1058 11022 Tom (longlong_t)effective_value, dd->dd_phys->dd_head_dataset_obj); 1059 789 ahrens } 1060 789 ahrens 1061 789 ahrens int 1062 11022 Tom dsl_dir_set_quota(const char *ddname, zprop_source_t source, uint64_t quota) 1063 789 ahrens { 1064 789 ahrens dsl_dir_t *dd; 1065 11022 Tom dsl_dataset_t *ds; 1066 11022 Tom dsl_prop_setarg_t psa; 1067 789 ahrens int err; 1068 789 ahrens 1069 11022 Tom dsl_prop_setarg_init_uint64(&psa, "quota", source, "a); 1070 11022 Tom 1071 11022 Tom err = dsl_dataset_hold(ddname, FTAG, &ds); 1072 1544 eschrock if (err) 1073 1544 eschrock return (err); 1074 789 ahrens 1075 11022 Tom err = dsl_dir_open(ddname, FTAG, &dd, NULL); 1076 11022 Tom if (err) { 1077 11022 Tom dsl_dataset_rele(ds, FTAG); 1078 11022 Tom return (err); 1079 11022 Tom } 1080 5481 ck153898 1081 11022 Tom ASSERT(ds->ds_dir == dd); 1082 11022 Tom 1083 11022 Tom /* 1084 11022 Tom * If someone removes a file, then tries to set the quota, we want to 1085 11022 Tom * make sure the file freeing takes effect. 1086 11022 Tom */ 1087 11022 Tom txg_wait_open(dd->dd_pool, 0); 1088 11022 Tom 1089 11022 Tom err = dsl_sync_task_do(dd->dd_pool, dsl_dir_set_quota_check, 1090 11022 Tom dsl_dir_set_quota_sync, ds, &psa, 0); 1091 11022 Tom 1092 789 ahrens dsl_dir_close(dd, FTAG); 1093 11022 Tom dsl_dataset_rele(ds, FTAG); 1094 789 ahrens return (err); 1095 789 ahrens } 1096 789 ahrens 1097 5378 ck153898 int 1098 2199 ahrens dsl_dir_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx) 1099 789 ahrens { 1100 11022 Tom dsl_dataset_t *ds = arg1; 1101 11022 Tom dsl_dir_t *dd = ds->ds_dir; 1102 11022 Tom dsl_prop_setarg_t *psa = arg2; 1103 11022 Tom uint64_t effective_value; 1104 789 ahrens uint64_t used, avail; 1105 11022 Tom int err; 1106 11022 Tom 1107 11022 Tom if ((err = dsl_prop_predict_sync(ds->ds_dir, psa)) != 0) 1108 11022 Tom return (err); 1109 11022 Tom 1110 11022 Tom effective_value = psa->psa_effective_value; 1111 2199 ahrens 1112 2199 ahrens /* 1113 2199 ahrens * If we are doing the preliminary check in open context, the 1114 2199 ahrens * space estimates may be inaccurate. 1115 2199 ahrens */ 1116 2199 ahrens if (!dmu_tx_is_syncing(tx)) 1117 2199 ahrens return (0); 1118 789 ahrens 1119 789 ahrens mutex_enter(&dd->dd_lock); 1120 7390 Matthew used = dd->dd_phys->dd_used_bytes; 1121 789 ahrens mutex_exit(&dd->dd_lock); 1122 789 ahrens 1123 789 ahrens if (dd->dd_parent) { 1124 789 ahrens avail = dsl_dir_space_available(dd->dd_parent, 1125 789 ahrens NULL, 0, FALSE); 1126 789 ahrens } else { 1127 789 ahrens avail = dsl_pool_adjustedsize(dd->dd_pool, B_FALSE) - used; 1128 789 ahrens } 1129 789 ahrens 1130 11022 Tom if (MAX(used, effective_value) > MAX(used, dd->dd_phys->dd_reserved)) { 1131 11022 Tom uint64_t delta = MAX(used, effective_value) - 1132 8525 Eric MAX(used, dd->dd_phys->dd_reserved); 1133 8525 Eric 1134 8525 Eric if (delta > avail) 1135 8525 Eric return (ENOSPC); 1136 8525 Eric if (dd->dd_phys->dd_quota > 0 && 1137 11022 Tom effective_value > dd->dd_phys->dd_quota) 1138 8525 Eric return (ENOSPC); 1139 8525 Eric } 1140 8525 Eric 1141 2199 ahrens return (0); 1142 2199 ahrens } 1143 2199 ahrens 1144 4543 marks /* ARGSUSED */ 1145 2199 ahrens static void 1146 4543 marks dsl_dir_set_reservation_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 1147 2199 ahrens { 1148 11022 Tom dsl_dataset_t *ds = arg1; 1149 11022 Tom dsl_dir_t *dd = ds->ds_dir; 1150 11022 Tom dsl_prop_setarg_t *psa = arg2; 1151 11022 Tom uint64_t effective_value = psa->psa_effective_value; 1152 2199 ahrens uint64_t used; 1153 2199 ahrens int64_t delta; 1154 11022 Tom 1155 11022 Tom dsl_prop_set_sync(ds, psa, cr, tx); 1156 11022 Tom DSL_PROP_CHECK_PREDICTION(dd, psa); 1157 2199 ahrens 1158 5378 ck153898 dmu_buf_will_dirty(dd->dd_dbuf, tx); 1159 5378 ck153898 1160 2199 ahrens mutex_enter(&dd->dd_lock); 1161 7390 Matthew used = dd->dd_phys->dd_used_bytes; 1162 11022 Tom delta = MAX(used, effective_value) - 1163 2199 ahrens MAX(used, dd->dd_phys->dd_reserved); 1164 11022 Tom dd->dd_phys->dd_reserved = effective_value; 1165 789 ahrens 1166 789 ahrens if (dd->dd_parent != NULL) { 1167 789 ahrens /* Roll up this additional usage into our ancestors */ 1168 7390 Matthew dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD_RSRV, 1169 7390 Matthew delta, 0, 0, tx); 1170 789 ahrens } 1171 7595 Matthew mutex_exit(&dd->dd_lock); 1172 4543 marks 1173 4543 marks spa_history_internal_log(LOG_DS_RESERVATION, dd->dd_pool->dp_spa, 1174 4543 marks tx, cr, "%lld dataset = %llu", 1175 11022 Tom (longlong_t)effective_value, dd->dd_phys->dd_head_dataset_obj); 1176 789 ahrens } 1177 789 ahrens 1178 789 ahrens int 1179 11022 Tom dsl_dir_set_reservation(const char *ddname, zprop_source_t source, 1180 11022 Tom uint64_t reservation) 1181 789 ahrens { 1182 789 ahrens dsl_dir_t *dd; 1183 11022 Tom dsl_dataset_t *ds; 1184 11022 Tom dsl_prop_setarg_t psa; 1185 789 ahrens int err; 1186 789 ahrens 1187 11022 Tom dsl_prop_setarg_init_uint64(&psa, "reservation", source, &reservation); 1188 11022 Tom 1189 11022 Tom err = dsl_dataset_hold(ddname, FTAG, &ds); 1190 1544 eschrock if (err) 1191 1544 eschrock return (err); 1192 11022 Tom 1193 11022 Tom err = dsl_dir_open(ddname, FTAG, &dd, NULL); 1194 11022 Tom if (err) { 1195 11022 Tom dsl_dataset_rele(ds, FTAG); 1196 11022 Tom return (err); 1197 11022 Tom } 1198 11022 Tom 1199 11022 Tom ASSERT(ds->ds_dir == dd); 1200 11022 Tom 1201 2199 ahrens err = dsl_sync_task_do(dd->dd_pool, dsl_dir_set_reservation_check, 1202 11022 Tom dsl_dir_set_reservation_sync, ds, &psa, 0); 1203 11022 Tom 1204 789 ahrens dsl_dir_close(dd, FTAG); 1205 11022 Tom dsl_dataset_rele(ds, FTAG); 1206 789 ahrens return (err); 1207 789 ahrens } 1208 789 ahrens 1209 789 ahrens static dsl_dir_t * 1210 789 ahrens closest_common_ancestor(dsl_dir_t *ds1, dsl_dir_t *ds2) 1211 789 ahrens { 1212 789 ahrens for (; ds1; ds1 = ds1->dd_parent) { 1213 789 ahrens dsl_dir_t *dd; 1214 789 ahrens for (dd = ds2; dd; dd = dd->dd_parent) { 1215 789 ahrens if (ds1 == dd) 1216 789 ahrens return (dd); 1217 789 ahrens } 1218 789 ahrens } 1219 789 ahrens return (NULL); 1220 789 ahrens } 1221 789 ahrens 1222 789 ahrens /* 1223 789 ahrens * If delta is applied to dd, how much of that delta would be applied to 1224 789 ahrens * ancestor? Syncing context only. 1225 789 ahrens */ 1226 789 ahrens static int64_t 1227 789 ahrens would_change(dsl_dir_t *dd, int64_t delta, dsl_dir_t *ancestor) 1228 789 ahrens { 1229 789 ahrens if (dd == ancestor) 1230 789 ahrens return (delta); 1231 789 ahrens 1232 789 ahrens mutex_enter(&dd->dd_lock); 1233 7390 Matthew delta = parent_delta(dd, dd->dd_phys->dd_used_bytes, delta); 1234 789 ahrens mutex_exit(&dd->dd_lock); 1235 789 ahrens return (would_change(dd->dd_parent, delta, ancestor)); 1236 789 ahrens } 1237 789 ahrens 1238 2199 ahrens struct renamearg { 1239 2199 ahrens dsl_dir_t *newparent; 1240 2199 ahrens const char *mynewname; 1241 2199 ahrens }; 1242 2199 ahrens 1243 4543 marks /*ARGSUSED*/ 1244 2199 ahrens static int 1245 2199 ahrens dsl_dir_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) 1246 789 ahrens { 1247 2199 ahrens dsl_dir_t *dd = arg1; 1248 2199 ahrens struct renamearg *ra = arg2; 1249 789 ahrens dsl_pool_t *dp = dd->dd_pool; 1250 789 ahrens objset_t *mos = dp->dp_meta_objset; 1251 2199 ahrens int err; 1252 2199 ahrens uint64_t val; 1253 789 ahrens 1254 2199 ahrens /* There should be 2 references: the open and the dirty */ 1255 2199 ahrens if (dmu_buf_refcount(dd->dd_dbuf) > 2) 1256 2199 ahrens return (EBUSY); 1257 789 ahrens 1258 2199 ahrens /* check for existing name */ 1259 2199 ahrens err = zap_lookup(mos, ra->newparent->dd_phys->dd_child_dir_zapobj, 1260 2199 ahrens ra->mynewname, 8, 1, &val); 1261 2199 ahrens if (err == 0) 1262 2199 ahrens return (EEXIST); 1263 2199 ahrens if (err != ENOENT) 1264 1544 eschrock return (err); 1265 789 ahrens 1266 2199 ahrens if (ra->newparent != dd->dd_parent) { 1267 2082 eschrock /* is there enough space? */ 1268 2082 eschrock uint64_t myspace = 1269 7390 Matthew MAX(dd->dd_phys->dd_used_bytes, dd->dd_phys->dd_reserved); 1270 789 ahrens 1271 2199 ahrens /* no rename into our descendant */ 1272 2199 ahrens if (closest_common_ancestor(dd, ra->newparent) == dd) 1273 789 ahrens return (EINVAL); 1274 789 ahrens 1275 2199 ahrens if (err = dsl_dir_transfer_possible(dd->dd_parent, 1276 2199 ahrens ra->newparent, myspace)) 1277 2082 eschrock return (err); 1278 2199 ahrens } 1279 789 ahrens 1280 2199 ahrens return (0); 1281 2199 ahrens } 1282 2199 ahrens 1283 2199 ahrens static void 1284 4543 marks dsl_dir_rename_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 1285 2199 ahrens { 1286 2199 ahrens dsl_dir_t *dd = arg1; 1287 2199 ahrens struct renamearg *ra = arg2; 1288 2199 ahrens dsl_pool_t *dp = dd->dd_pool; 1289 2199 ahrens objset_t *mos = dp->dp_meta_objset; 1290 2199 ahrens int err; 1291 2199 ahrens 1292 2199 ahrens ASSERT(dmu_buf_refcount(dd->dd_dbuf) <= 2); 1293 2199 ahrens 1294 2199 ahrens if (ra->newparent != dd->dd_parent) { 1295 7390 Matthew dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD, 1296 7390 Matthew -dd->dd_phys->dd_used_bytes, 1297 789 ahrens -dd->dd_phys->dd_compressed_bytes, 1298 789 ahrens -dd->dd_phys->dd_uncompressed_bytes, tx); 1299 7390 Matthew dsl_dir_diduse_space(ra->newparent, DD_USED_CHILD, 1300 7390 Matthew dd->dd_phys->dd_used_bytes, 1301 789 ahrens dd->dd_phys->dd_compressed_bytes, 1302 789 ahrens dd->dd_phys->dd_uncompressed_bytes, tx); 1303 7390 Matthew 1304 7390 Matthew if (dd->dd_phys->dd_reserved > dd->dd_phys->dd_used_bytes) { 1305 7390 Matthew uint64_t unused_rsrv = dd->dd_phys->dd_reserved - 1306 7390 Matthew dd->dd_phys->dd_used_bytes; 1307 7390 Matthew 1308 7390 Matthew dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD_RSRV, 1309 7390 Matthew -unused_rsrv, 0, 0, tx); 1310 7390 Matthew dsl_dir_diduse_space(ra->newparent, DD_USED_CHILD_RSRV, 1311 7390 Matthew unused_rsrv, 0, 0, tx); 1312 7390 Matthew } 1313 789 ahrens } 1314 789 ahrens 1315 789 ahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 1316 789 ahrens 1317 789 ahrens /* remove from old parent zapobj */ 1318 789 ahrens err = zap_remove(mos, dd->dd_parent->dd_phys->dd_child_dir_zapobj, 1319 789 ahrens dd->dd_myname, tx); 1320 789 ahrens ASSERT3U(err, ==, 0); 1321 789 ahrens 1322 2199 ahrens (void) strcpy(dd->dd_myname, ra->mynewname); 1323 789 ahrens dsl_dir_close(dd->dd_parent, dd); 1324 2199 ahrens dd->dd_phys->dd_parent_obj = ra->newparent->dd_object; 1325 1544 eschrock VERIFY(0 == dsl_dir_open_obj(dd->dd_pool, 1326 2199 ahrens ra->newparent->dd_object, NULL, dd, &dd->dd_parent)); 1327 789 ahrens 1328 789 ahrens /* add to new parent zapobj */ 1329 2199 ahrens err = zap_add(mos, ra->newparent->dd_phys->dd_child_dir_zapobj, 1330 789 ahrens dd->dd_myname, 8, 1, &dd->dd_object, tx); 1331 789 ahrens ASSERT3U(err, ==, 0); 1332 4543 marks 1333 4543 marks spa_history_internal_log(LOG_DS_RENAME, dd->dd_pool->dp_spa, 1334 4543 marks tx, cr, "dataset = %llu", dd->dd_phys->dd_head_dataset_obj); 1335 2199 ahrens } 1336 789 ahrens 1337 2199 ahrens int 1338 2199 ahrens dsl_dir_rename(dsl_dir_t *dd, const char *newname) 1339 2199 ahrens { 1340 2199 ahrens struct renamearg ra; 1341 2199 ahrens int err; 1342 2199 ahrens 1343 2199 ahrens /* new parent should exist */ 1344 2199 ahrens err = dsl_dir_open(newname, FTAG, &ra.newparent, &ra.mynewname); 1345 2199 ahrens if (err) 1346 2199 ahrens return (err); 1347 2199 ahrens 1348 2199 ahrens /* can't rename to different pool */ 1349 2199 ahrens if (dd->dd_pool != ra.newparent->dd_pool) { 1350 2199 ahrens err = ENXIO; 1351 2199 ahrens goto out; 1352 2199 ahrens } 1353 2199 ahrens 1354 2199 ahrens /* new name should not already exist */ 1355 2199 ahrens if (ra.mynewname == NULL) { 1356 2199 ahrens err = EEXIST; 1357 2199 ahrens goto out; 1358 2199 ahrens } 1359 2199 ahrens 1360 2199 ahrens err = dsl_sync_task_do(dd->dd_pool, 1361 2199 ahrens dsl_dir_rename_check, dsl_dir_rename_sync, dd, &ra, 3); 1362 2199 ahrens 1363 2199 ahrens out: 1364 2199 ahrens dsl_dir_close(ra.newparent, FTAG); 1365 2199 ahrens return (err); 1366 789 ahrens } 1367 2082 eschrock 1368 2082 eschrock int 1369 2082 eschrock dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space) 1370 2082 eschrock { 1371 2082 eschrock dsl_dir_t *ancestor; 1372 2082 eschrock int64_t adelta; 1373 2082 eschrock uint64_t avail; 1374 2082 eschrock 1375 2082 eschrock ancestor = closest_common_ancestor(sdd, tdd); 1376 2082 eschrock adelta = would_change(sdd, -space, ancestor); 1377 2082 eschrock avail = dsl_dir_space_available(tdd, ancestor, adelta, FALSE); 1378 2082 eschrock if (avail < space) 1379 2082 eschrock return (ENOSPC); 1380 2082 eschrock 1381 2082 eschrock return (0); 1382 2082 eschrock } 1383 10373 chris 1384 10373 chris timestruc_t 1385 10373 chris dsl_dir_snap_cmtime(dsl_dir_t *dd) 1386 10373 chris { 1387 10373 chris timestruc_t t; 1388 10373 chris 1389 10373 chris mutex_enter(&dd->dd_lock); 1390 10373 chris t = dd->dd_snap_cmtime; 1391 10373 chris mutex_exit(&dd->dd_lock); 1392 10373 chris 1393 10373 chris return (t); 1394 10373 chris } 1395 10373 chris 1396 10373 chris void 1397 10373 chris dsl_dir_snap_cmtime_update(dsl_dir_t *dd) 1398 10373 chris { 1399 10373 chris timestruc_t t; 1400 10373 chris 1401 10373 chris gethrestime(&t); 1402 10373 chris mutex_enter(&dd->dd_lock); 1403 10373 chris dd->dd_snap_cmtime = t; 1404 10373 chris mutex_exit(&dd->dd_lock); 1405 10373 chris } 1406
Indexes created Sat Nov 28 01:19:25 UTC 2009
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