1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 223f9d6ad7SLin Ling * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 234445fffbSMatthew Ahrens * Copyright (c) 2012 by Delphix. All rights reserved. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #include <sys/dmu.h> 27a9799022Sck #include <sys/dmu_objset.h> 28fa9e4066Sahrens #include <sys/dmu_tx.h> 29fa9e4066Sahrens #include <sys/dsl_dataset.h> 30fa9e4066Sahrens #include <sys/dsl_dir.h> 31fa9e4066Sahrens #include <sys/dsl_prop.h> 321d452cf5Sahrens #include <sys/dsl_synctask.h> 33ecd6cf80Smarks #include <sys/dsl_deleg.h> 34fa9e4066Sahrens #include <sys/spa.h> 35b24ab676SJeff Bonwick #include <sys/metaslab.h> 36fa9e4066Sahrens #include <sys/zap.h> 37fa9e4066Sahrens #include <sys/zio.h> 38fa9e4066Sahrens #include <sys/arc.h> 39ecd6cf80Smarks #include <sys/sunddi.h> 40fa9e4066Sahrens #include "zfs_namecheck.h" 41fa9e4066Sahrens 42a9799022Sck static uint64_t dsl_dir_space_towrite(dsl_dir_t *dd); 434445fffbSMatthew Ahrens static void dsl_dir_set_reservation_sync_impl(dsl_dir_t *dd, 444445fffbSMatthew Ahrens uint64_t value, dmu_tx_t *tx); 45fa9e4066Sahrens 46fa9e4066Sahrens /* ARGSUSED */ 47fa9e4066Sahrens static void 48fa9e4066Sahrens dsl_dir_evict(dmu_buf_t *db, void *arg) 49fa9e4066Sahrens { 50fa9e4066Sahrens dsl_dir_t *dd = arg; 51fa9e4066Sahrens dsl_pool_t *dp = dd->dd_pool; 52fa9e4066Sahrens int t; 53fa9e4066Sahrens 54fa9e4066Sahrens for (t = 0; t < TXG_SIZE; t++) { 55fa9e4066Sahrens ASSERT(!txg_list_member(&dp->dp_dirty_dirs, dd, t)); 56fa9e4066Sahrens ASSERT(dd->dd_tempreserved[t] == 0); 57fa9e4066Sahrens ASSERT(dd->dd_space_towrite[t] == 0); 58fa9e4066Sahrens } 59fa9e4066Sahrens 60fa9e4066Sahrens if (dd->dd_parent) 61fa9e4066Sahrens dsl_dir_close(dd->dd_parent, dd); 62fa9e4066Sahrens 63fa9e4066Sahrens spa_close(dd->dd_pool->dp_spa, dd); 64fa9e4066Sahrens 65fa9e4066Sahrens /* 663f9d6ad7SLin Ling * The props callback list should have been cleaned up by 673f9d6ad7SLin Ling * objset_evict(). 68fa9e4066Sahrens */ 69fa9e4066Sahrens list_destroy(&dd->dd_prop_cbs); 705ad82045Snd mutex_destroy(&dd->dd_lock); 71fa9e4066Sahrens kmem_free(dd, sizeof (dsl_dir_t)); 72fa9e4066Sahrens } 73fa9e4066Sahrens 74ea8dc4b6Seschrock int 75fa9e4066Sahrens dsl_dir_open_obj(dsl_pool_t *dp, uint64_t ddobj, 76ea8dc4b6Seschrock const char *tail, void *tag, dsl_dir_t **ddp) 77fa9e4066Sahrens { 78fa9e4066Sahrens dmu_buf_t *dbuf; 79fa9e4066Sahrens dsl_dir_t *dd; 80ea8dc4b6Seschrock int err; 81fa9e4066Sahrens 82fa9e4066Sahrens ASSERT(RW_LOCK_HELD(&dp->dp_config_rwlock) || 83fa9e4066Sahrens dsl_pool_sync_context(dp)); 84fa9e4066Sahrens 85ea8dc4b6Seschrock err = dmu_bonus_hold(dp->dp_meta_objset, ddobj, tag, &dbuf); 86ea8dc4b6Seschrock if (err) 87ea8dc4b6Seschrock return (err); 88fa9e4066Sahrens dd = dmu_buf_get_user(dbuf); 89fa9e4066Sahrens #ifdef ZFS_DEBUG 90fa9e4066Sahrens { 91fa9e4066Sahrens dmu_object_info_t doi; 92fa9e4066Sahrens dmu_object_info_from_db(dbuf, &doi); 931649cd4bStabriz ASSERT3U(doi.doi_type, ==, DMU_OT_DSL_DIR); 9474e7dc98SMatthew Ahrens ASSERT3U(doi.doi_bonus_size, >=, sizeof (dsl_dir_phys_t)); 95fa9e4066Sahrens } 96fa9e4066Sahrens #endif 97fa9e4066Sahrens if (dd == NULL) { 98fa9e4066Sahrens dsl_dir_t *winner; 99fa9e4066Sahrens 100fa9e4066Sahrens dd = kmem_zalloc(sizeof (dsl_dir_t), KM_SLEEP); 101fa9e4066Sahrens dd->dd_object = ddobj; 102fa9e4066Sahrens dd->dd_dbuf = dbuf; 103fa9e4066Sahrens dd->dd_pool = dp; 104fa9e4066Sahrens dd->dd_phys = dbuf->db_data; 1055ad82045Snd mutex_init(&dd->dd_lock, NULL, MUTEX_DEFAULT, NULL); 106fa9e4066Sahrens 107fa9e4066Sahrens list_create(&dd->dd_prop_cbs, sizeof (dsl_prop_cb_record_t), 108fa9e4066Sahrens offsetof(dsl_prop_cb_record_t, cbr_node)); 109fa9e4066Sahrens 11071eb0538SChris Kirby dsl_dir_snap_cmtime_update(dd); 11171eb0538SChris Kirby 112fa9e4066Sahrens if (dd->dd_phys->dd_parent_obj) { 113ea8dc4b6Seschrock err = dsl_dir_open_obj(dp, dd->dd_phys->dd_parent_obj, 114ea8dc4b6Seschrock NULL, dd, &dd->dd_parent); 11574e7dc98SMatthew Ahrens if (err) 11674e7dc98SMatthew Ahrens goto errout; 117fa9e4066Sahrens if (tail) { 118fa9e4066Sahrens #ifdef ZFS_DEBUG 119fa9e4066Sahrens uint64_t foundobj; 120fa9e4066Sahrens 121fa9e4066Sahrens err = zap_lookup(dp->dp_meta_objset, 122e7437265Sahrens dd->dd_parent->dd_phys->dd_child_dir_zapobj, 123fa9e4066Sahrens tail, sizeof (foundobj), 1, &foundobj); 124ea8dc4b6Seschrock ASSERT(err || foundobj == ddobj); 125fa9e4066Sahrens #endif 126fa9e4066Sahrens (void) strcpy(dd->dd_myname, tail); 127fa9e4066Sahrens } else { 128fa9e4066Sahrens err = zap_value_search(dp->dp_meta_objset, 129e7437265Sahrens dd->dd_parent->dd_phys->dd_child_dir_zapobj, 130e7437265Sahrens ddobj, 0, dd->dd_myname); 131ea8dc4b6Seschrock } 13274e7dc98SMatthew Ahrens if (err) 13374e7dc98SMatthew Ahrens goto errout; 134fa9e4066Sahrens } else { 135fa9e4066Sahrens (void) strcpy(dd->dd_myname, spa_name(dp->dp_spa)); 136fa9e4066Sahrens } 137fa9e4066Sahrens 1383f9d6ad7SLin Ling if (dsl_dir_is_clone(dd)) { 1393f9d6ad7SLin Ling dmu_buf_t *origin_bonus; 1403f9d6ad7SLin Ling dsl_dataset_phys_t *origin_phys; 1413f9d6ad7SLin Ling 1423f9d6ad7SLin Ling /* 1433f9d6ad7SLin Ling * We can't open the origin dataset, because 1443f9d6ad7SLin Ling * that would require opening this dsl_dir. 1453f9d6ad7SLin Ling * Just look at its phys directly instead. 1463f9d6ad7SLin Ling */ 1473f9d6ad7SLin Ling err = dmu_bonus_hold(dp->dp_meta_objset, 1483f9d6ad7SLin Ling dd->dd_phys->dd_origin_obj, FTAG, &origin_bonus); 1493f9d6ad7SLin Ling if (err) 1503f9d6ad7SLin Ling goto errout; 1513f9d6ad7SLin Ling origin_phys = origin_bonus->db_data; 1523f9d6ad7SLin Ling dd->dd_origin_txg = 1533f9d6ad7SLin Ling origin_phys->ds_creation_txg; 1543f9d6ad7SLin Ling dmu_buf_rele(origin_bonus, FTAG); 1553f9d6ad7SLin Ling } 1563f9d6ad7SLin Ling 157fa9e4066Sahrens winner = dmu_buf_set_user_ie(dbuf, dd, &dd->dd_phys, 158fa9e4066Sahrens dsl_dir_evict); 159fa9e4066Sahrens if (winner) { 160fa9e4066Sahrens if (dd->dd_parent) 161fa9e4066Sahrens dsl_dir_close(dd->dd_parent, dd); 1625ad82045Snd mutex_destroy(&dd->dd_lock); 163fa9e4066Sahrens kmem_free(dd, sizeof (dsl_dir_t)); 164fa9e4066Sahrens dd = winner; 165fa9e4066Sahrens } else { 166fa9e4066Sahrens spa_open_ref(dp->dp_spa, dd); 167fa9e4066Sahrens } 168fa9e4066Sahrens } 169fa9e4066Sahrens 170fa9e4066Sahrens /* 171fa9e4066Sahrens * The dsl_dir_t has both open-to-close and instantiate-to-evict 172fa9e4066Sahrens * holds on the spa. We need the open-to-close holds because 173fa9e4066Sahrens * otherwise the spa_refcnt wouldn't change when we open a 174fa9e4066Sahrens * dir which the spa also has open, so we could incorrectly 175fa9e4066Sahrens * think it was OK to unload/export/destroy the pool. We need 176fa9e4066Sahrens * the instantiate-to-evict hold because the dsl_dir_t has a 177fa9e4066Sahrens * pointer to the dd_pool, which has a pointer to the spa_t. 178fa9e4066Sahrens */ 179fa9e4066Sahrens spa_open_ref(dp->dp_spa, tag); 180fa9e4066Sahrens ASSERT3P(dd->dd_pool, ==, dp); 181fa9e4066Sahrens ASSERT3U(dd->dd_object, ==, ddobj); 182fa9e4066Sahrens ASSERT3P(dd->dd_dbuf, ==, dbuf); 183ea8dc4b6Seschrock *ddp = dd; 184ea8dc4b6Seschrock return (0); 18574e7dc98SMatthew Ahrens 18674e7dc98SMatthew Ahrens errout: 18774e7dc98SMatthew Ahrens if (dd->dd_parent) 18874e7dc98SMatthew Ahrens dsl_dir_close(dd->dd_parent, dd); 18974e7dc98SMatthew Ahrens mutex_destroy(&dd->dd_lock); 19074e7dc98SMatthew Ahrens kmem_free(dd, sizeof (dsl_dir_t)); 19174e7dc98SMatthew Ahrens dmu_buf_rele(dbuf, tag); 19274e7dc98SMatthew Ahrens return (err); 193fa9e4066Sahrens } 194fa9e4066Sahrens 195fa9e4066Sahrens void 196fa9e4066Sahrens dsl_dir_close(dsl_dir_t *dd, void *tag) 197fa9e4066Sahrens { 198fa9e4066Sahrens dprintf_dd(dd, "%s\n", ""); 199fa9e4066Sahrens spa_close(dd->dd_pool->dp_spa, tag); 200ea8dc4b6Seschrock dmu_buf_rele(dd->dd_dbuf, tag); 201fa9e4066Sahrens } 202fa9e4066Sahrens 20315f66a7fSek /* buf must be long enough (MAXNAMELEN + strlen(MOS_DIR_NAME) + 1 should do) */ 204fa9e4066Sahrens void 205fa9e4066Sahrens dsl_dir_name(dsl_dir_t *dd, char *buf) 206fa9e4066Sahrens { 207fa9e4066Sahrens if (dd->dd_parent) { 208fa9e4066Sahrens dsl_dir_name(dd->dd_parent, buf); 209fa9e4066Sahrens (void) strcat(buf, "/"); 210fa9e4066Sahrens } else { 211fa9e4066Sahrens buf[0] = '\0'; 212fa9e4066Sahrens } 213fa9e4066Sahrens if (!MUTEX_HELD(&dd->dd_lock)) { 214fa9e4066Sahrens /* 215fa9e4066Sahrens * recursive mutex so that we can use 216fa9e4066Sahrens * dprintf_dd() with dd_lock held 217fa9e4066Sahrens */ 218fa9e4066Sahrens mutex_enter(&dd->dd_lock); 219fa9e4066Sahrens (void) strcat(buf, dd->dd_myname); 220fa9e4066Sahrens mutex_exit(&dd->dd_lock); 221fa9e4066Sahrens } else { 222fa9e4066Sahrens (void) strcat(buf, dd->dd_myname); 223fa9e4066Sahrens } 224fa9e4066Sahrens } 225fa9e4066Sahrens 226*ce636f8bSMatthew Ahrens /* Calculate name length, avoiding all the strcat calls of dsl_dir_name */ 227b7661cccSmmusante int 228b7661cccSmmusante dsl_dir_namelen(dsl_dir_t *dd) 229b7661cccSmmusante { 230b7661cccSmmusante int result = 0; 231b7661cccSmmusante 232b7661cccSmmusante if (dd->dd_parent) { 233b7661cccSmmusante /* parent's name + 1 for the "/" */ 234b7661cccSmmusante result = dsl_dir_namelen(dd->dd_parent) + 1; 235b7661cccSmmusante } 236b7661cccSmmusante 237b7661cccSmmusante if (!MUTEX_HELD(&dd->dd_lock)) { 238b7661cccSmmusante /* see dsl_dir_name */ 239b7661cccSmmusante mutex_enter(&dd->dd_lock); 240b7661cccSmmusante result += strlen(dd->dd_myname); 241b7661cccSmmusante mutex_exit(&dd->dd_lock); 242b7661cccSmmusante } else { 243b7661cccSmmusante result += strlen(dd->dd_myname); 244b7661cccSmmusante } 245b7661cccSmmusante 246b7661cccSmmusante return (result); 247b7661cccSmmusante } 248b7661cccSmmusante 249fa9e4066Sahrens static int 250fa9e4066Sahrens getcomponent(const char *path, char *component, const char **nextp) 251fa9e4066Sahrens { 252fa9e4066Sahrens char *p; 253ccba0801SRich Morris if ((path == NULL) || (path[0] == '\0')) 254203a47d8Snd return (ENOENT); 255fa9e4066Sahrens /* This would be a good place to reserve some namespace... */ 256fa9e4066Sahrens p = strpbrk(path, "/@"); 257fa9e4066Sahrens if (p && (p[1] == '/' || p[1] == '@')) { 258fa9e4066Sahrens /* two separators in a row */ 259fa9e4066Sahrens return (EINVAL); 260fa9e4066Sahrens } 261fa9e4066Sahrens if (p == NULL || p == path) { 262fa9e4066Sahrens /* 263fa9e4066Sahrens * if the first thing is an @ or /, it had better be an 264fa9e4066Sahrens * @ and it had better not have any more ats or slashes, 265fa9e4066Sahrens * and it had better have something after the @. 266fa9e4066Sahrens */ 267fa9e4066Sahrens if (p != NULL && 268fa9e4066Sahrens (p[0] != '@' || strpbrk(path+1, "/@") || p[1] == '\0')) 269fa9e4066Sahrens return (EINVAL); 270fa9e4066Sahrens if (strlen(path) >= MAXNAMELEN) 271fa9e4066Sahrens return (ENAMETOOLONG); 272fa9e4066Sahrens (void) strcpy(component, path); 273fa9e4066Sahrens p = NULL; 274fa9e4066Sahrens } else if (p[0] == '/') { 275fa9e4066Sahrens if (p-path >= MAXNAMELEN) 276fa9e4066Sahrens return (ENAMETOOLONG); 277fa9e4066Sahrens (void) strncpy(component, path, p - path); 278fa9e4066Sahrens component[p-path] = '\0'; 279fa9e4066Sahrens p++; 280fa9e4066Sahrens } else if (p[0] == '@') { 281fa9e4066Sahrens /* 282fa9e4066Sahrens * if the next separator is an @, there better not be 283fa9e4066Sahrens * any more slashes. 284fa9e4066Sahrens */ 285fa9e4066Sahrens if (strchr(path, '/')) 286fa9e4066Sahrens return (EINVAL); 287fa9e4066Sahrens if (p-path >= MAXNAMELEN) 288fa9e4066Sahrens return (ENAMETOOLONG); 289fa9e4066Sahrens (void) strncpy(component, path, p - path); 290fa9e4066Sahrens component[p-path] = '\0'; 291fa9e4066Sahrens } else { 292fa9e4066Sahrens ASSERT(!"invalid p"); 293fa9e4066Sahrens } 294fa9e4066Sahrens *nextp = p; 295fa9e4066Sahrens return (0); 296fa9e4066Sahrens } 297fa9e4066Sahrens 298fa9e4066Sahrens /* 299fa9e4066Sahrens * same as dsl_open_dir, ignore the first component of name and use the 300fa9e4066Sahrens * spa instead 301fa9e4066Sahrens */ 302ea8dc4b6Seschrock int 303ea8dc4b6Seschrock dsl_dir_open_spa(spa_t *spa, const char *name, void *tag, 304ea8dc4b6Seschrock dsl_dir_t **ddp, const char **tailp) 305fa9e4066Sahrens { 306fa9e4066Sahrens char buf[MAXNAMELEN]; 307fa9e4066Sahrens const char *next, *nextnext = NULL; 308fa9e4066Sahrens int err; 309fa9e4066Sahrens dsl_dir_t *dd; 310fa9e4066Sahrens dsl_pool_t *dp; 311fa9e4066Sahrens uint64_t ddobj; 312fa9e4066Sahrens int openedspa = FALSE; 313fa9e4066Sahrens 314fa9e4066Sahrens dprintf("%s\n", name); 315fa9e4066Sahrens 316fa9e4066Sahrens err = getcomponent(name, buf, &next); 317fa9e4066Sahrens if (err) 318ea8dc4b6Seschrock return (err); 319fa9e4066Sahrens if (spa == NULL) { 320fa9e4066Sahrens err = spa_open(buf, &spa, FTAG); 321fa9e4066Sahrens if (err) { 322fa9e4066Sahrens dprintf("spa_open(%s) failed\n", buf); 323ea8dc4b6Seschrock return (err); 324fa9e4066Sahrens } 325fa9e4066Sahrens openedspa = TRUE; 326fa9e4066Sahrens 327fa9e4066Sahrens /* XXX this assertion belongs in spa_open */ 328fa9e4066Sahrens ASSERT(!dsl_pool_sync_context(spa_get_dsl(spa))); 329fa9e4066Sahrens } 330fa9e4066Sahrens 331fa9e4066Sahrens dp = spa_get_dsl(spa); 332fa9e4066Sahrens 333fa9e4066Sahrens rw_enter(&dp->dp_config_rwlock, RW_READER); 334ea8dc4b6Seschrock err = dsl_dir_open_obj(dp, dp->dp_root_dir_obj, NULL, tag, &dd); 335ea8dc4b6Seschrock if (err) { 336ea8dc4b6Seschrock rw_exit(&dp->dp_config_rwlock); 337ea8dc4b6Seschrock if (openedspa) 338ea8dc4b6Seschrock spa_close(spa, FTAG); 339ea8dc4b6Seschrock return (err); 340ea8dc4b6Seschrock } 341ea8dc4b6Seschrock 342fa9e4066Sahrens while (next != NULL) { 343fa9e4066Sahrens dsl_dir_t *child_ds; 344fa9e4066Sahrens err = getcomponent(next, buf, &nextnext); 345ea8dc4b6Seschrock if (err) 346ea8dc4b6Seschrock break; 347fa9e4066Sahrens ASSERT(next[0] != '\0'); 348fa9e4066Sahrens if (next[0] == '@') 349fa9e4066Sahrens break; 350fa9e4066Sahrens dprintf("looking up %s in obj%lld\n", 351fa9e4066Sahrens buf, dd->dd_phys->dd_child_dir_zapobj); 352fa9e4066Sahrens 353fa9e4066Sahrens err = zap_lookup(dp->dp_meta_objset, 354fa9e4066Sahrens dd->dd_phys->dd_child_dir_zapobj, 355fa9e4066Sahrens buf, sizeof (ddobj), 1, &ddobj); 356ea8dc4b6Seschrock if (err) { 357ea8dc4b6Seschrock if (err == ENOENT) 358ea8dc4b6Seschrock err = 0; 359fa9e4066Sahrens break; 360fa9e4066Sahrens } 361fa9e4066Sahrens 362ea8dc4b6Seschrock err = dsl_dir_open_obj(dp, ddobj, buf, tag, &child_ds); 363ea8dc4b6Seschrock if (err) 364ea8dc4b6Seschrock break; 365fa9e4066Sahrens dsl_dir_close(dd, tag); 366fa9e4066Sahrens dd = child_ds; 367fa9e4066Sahrens next = nextnext; 368fa9e4066Sahrens } 369fa9e4066Sahrens rw_exit(&dp->dp_config_rwlock); 370fa9e4066Sahrens 371ea8dc4b6Seschrock if (err) { 372ea8dc4b6Seschrock dsl_dir_close(dd, tag); 373ea8dc4b6Seschrock if (openedspa) 374ea8dc4b6Seschrock spa_close(spa, FTAG); 375ea8dc4b6Seschrock return (err); 376ea8dc4b6Seschrock } 377ea8dc4b6Seschrock 378fa9e4066Sahrens /* 379fa9e4066Sahrens * It's an error if there's more than one component left, or 380fa9e4066Sahrens * tailp==NULL and there's any component left. 381fa9e4066Sahrens */ 382fa9e4066Sahrens if (next != NULL && 383fa9e4066Sahrens (tailp == NULL || (nextnext && nextnext[0] != '\0'))) { 384fa9e4066Sahrens /* bad path name */ 385fa9e4066Sahrens dsl_dir_close(dd, tag); 386fa9e4066Sahrens dprintf("next=%p (%s) tail=%p\n", next, next?next:"", tailp); 387ea8dc4b6Seschrock err = ENOENT; 388fa9e4066Sahrens } 389fa9e4066Sahrens if (tailp) 390fa9e4066Sahrens *tailp = next; 391fa9e4066Sahrens if (openedspa) 392fa9e4066Sahrens spa_close(spa, FTAG); 393ea8dc4b6Seschrock *ddp = dd; 394ea8dc4b6Seschrock return (err); 395fa9e4066Sahrens } 396fa9e4066Sahrens 397fa9e4066Sahrens /* 398fa9e4066Sahrens * Return the dsl_dir_t, and possibly the last component which couldn't 399fa9e4066Sahrens * be found in *tail. Return NULL if the path is bogus, or if 400fa9e4066Sahrens * tail==NULL and we couldn't parse the whole name. (*tail)[0] == '@' 401fa9e4066Sahrens * means that the last component is a snapshot. 402fa9e4066Sahrens */ 403ea8dc4b6Seschrock int 404ea8dc4b6Seschrock dsl_dir_open(const char *name, void *tag, dsl_dir_t **ddp, const char **tailp) 405fa9e4066Sahrens { 406ea8dc4b6Seschrock return (dsl_dir_open_spa(NULL, name, tag, ddp, tailp)); 407fa9e4066Sahrens } 408fa9e4066Sahrens 4091d452cf5Sahrens uint64_t 410088f3894Sahrens dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds, const char *name, 411088f3894Sahrens dmu_tx_t *tx) 412fa9e4066Sahrens { 413088f3894Sahrens objset_t *mos = dp->dp_meta_objset; 414fa9e4066Sahrens uint64_t ddobj; 415cde58dbcSMatthew Ahrens dsl_dir_phys_t *ddphys; 416fa9e4066Sahrens dmu_buf_t *dbuf; 417fa9e4066Sahrens 4181649cd4bStabriz ddobj = dmu_object_alloc(mos, DMU_OT_DSL_DIR, 0, 4191649cd4bStabriz DMU_OT_DSL_DIR, sizeof (dsl_dir_phys_t), tx); 420088f3894Sahrens if (pds) { 421088f3894Sahrens VERIFY(0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, 422088f3894Sahrens name, sizeof (uint64_t), 1, &ddobj, tx)); 423088f3894Sahrens } else { 424088f3894Sahrens /* it's the root dir */ 425088f3894Sahrens VERIFY(0 == zap_add(mos, DMU_POOL_DIRECTORY_OBJECT, 426088f3894Sahrens DMU_POOL_ROOT_DATASET, sizeof (uint64_t), 1, &ddobj, tx)); 427088f3894Sahrens } 428ea8dc4b6Seschrock VERIFY(0 == dmu_bonus_hold(mos, ddobj, FTAG, &dbuf)); 429fa9e4066Sahrens dmu_buf_will_dirty(dbuf, tx); 430cde58dbcSMatthew Ahrens ddphys = dbuf->db_data; 431fa9e4066Sahrens 432cde58dbcSMatthew Ahrens ddphys->dd_creation_time = gethrestime_sec(); 433088f3894Sahrens if (pds) 434cde58dbcSMatthew Ahrens ddphys->dd_parent_obj = pds->dd_object; 435cde58dbcSMatthew Ahrens ddphys->dd_props_zapobj = zap_create(mos, 436fa9e4066Sahrens DMU_OT_DSL_PROPS, DMU_OT_NONE, 0, tx); 437cde58dbcSMatthew Ahrens ddphys->dd_child_dir_zapobj = zap_create(mos, 43887e5029aSahrens DMU_OT_DSL_DIR_CHILD_MAP, DMU_OT_NONE, 0, tx); 43974e7dc98SMatthew Ahrens if (spa_version(dp->dp_spa) >= SPA_VERSION_USED_BREAKDOWN) 440cde58dbcSMatthew Ahrens ddphys->dd_flags |= DD_FLAG_USED_BREAKDOWN; 441ea8dc4b6Seschrock dmu_buf_rele(dbuf, FTAG); 442fa9e4066Sahrens 4431d452cf5Sahrens return (ddobj); 444fa9e4066Sahrens } 445fa9e4066Sahrens 4461d452cf5Sahrens /* ARGSUSED */ 447fa9e4066Sahrens int 4481d452cf5Sahrens dsl_dir_destroy_check(void *arg1, void *arg2, dmu_tx_t *tx) 449fa9e4066Sahrens { 4504445fffbSMatthew Ahrens dsl_dir_t *dd = arg1; 4511d452cf5Sahrens dsl_pool_t *dp = dd->dd_pool; 452fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 4531d452cf5Sahrens int err; 4541d452cf5Sahrens uint64_t count; 455fa9e4066Sahrens 4561d452cf5Sahrens /* 4571d452cf5Sahrens * There should be exactly two holds, both from 4581d452cf5Sahrens * dsl_dataset_destroy: one on the dd directory, and one on its 4591d452cf5Sahrens * head ds. Otherwise, someone is trying to lookup something 4601d452cf5Sahrens * inside this dir while we want to destroy it. The 4611d452cf5Sahrens * config_rwlock ensures that nobody else opens it after we 4621d452cf5Sahrens * check. 4631d452cf5Sahrens */ 4641d452cf5Sahrens if (dmu_buf_refcount(dd->dd_dbuf) > 2) 4651d452cf5Sahrens return (EBUSY); 466fa9e4066Sahrens 4671d452cf5Sahrens err = zap_count(mos, dd->dd_phys->dd_child_dir_zapobj, &count); 468ea8dc4b6Seschrock if (err) 4691d452cf5Sahrens return (err); 4701d452cf5Sahrens if (count != 0) 4711d452cf5Sahrens return (EEXIST); 472fa9e4066Sahrens 4731d452cf5Sahrens return (0); 4741d452cf5Sahrens } 475fa9e4066Sahrens 4761d452cf5Sahrens void 4773f9d6ad7SLin Ling dsl_dir_destroy_sync(void *arg1, void *tag, dmu_tx_t *tx) 4781d452cf5Sahrens { 4794445fffbSMatthew Ahrens dsl_dir_t *dd = arg1; 4801d452cf5Sahrens objset_t *mos = dd->dd_pool->dp_meta_objset; 48192241e0bSTom Erickson uint64_t obj; 48274e7dc98SMatthew Ahrens dd_used_t t; 483fa9e4066Sahrens 4841d452cf5Sahrens ASSERT(RW_WRITE_HELD(&dd->dd_pool->dp_config_rwlock)); 485fa9e4066Sahrens ASSERT(dd->dd_phys->dd_head_dataset_obj == 0); 486fa9e4066Sahrens 4874445fffbSMatthew Ahrens /* 4884445fffbSMatthew Ahrens * Remove our reservation. The impl() routine avoids setting the 4894445fffbSMatthew Ahrens * actual property, which would require the (already destroyed) ds. 4904445fffbSMatthew Ahrens */ 4914445fffbSMatthew Ahrens dsl_dir_set_reservation_sync_impl(dd, 0, tx); 49292241e0bSTom Erickson 493b420f3adSRichard Lowe ASSERT3U(dd->dd_phys->dd_used_bytes, ==, 0); 494b420f3adSRichard Lowe ASSERT3U(dd->dd_phys->dd_reserved, ==, 0); 49574e7dc98SMatthew Ahrens for (t = 0; t < DD_USED_NUM; t++) 496b420f3adSRichard Lowe ASSERT3U(dd->dd_phys->dd_used_breakdown[t], ==, 0); 497fa9e4066Sahrens 4981d452cf5Sahrens VERIFY(0 == zap_destroy(mos, dd->dd_phys->dd_child_dir_zapobj, tx)); 4991d452cf5Sahrens VERIFY(0 == zap_destroy(mos, dd->dd_phys->dd_props_zapobj, tx)); 500ecd6cf80Smarks VERIFY(0 == dsl_deleg_destroy(mos, dd->dd_phys->dd_deleg_zapobj, tx)); 5011d452cf5Sahrens VERIFY(0 == zap_remove(mos, 5021d452cf5Sahrens dd->dd_parent->dd_phys->dd_child_dir_zapobj, dd->dd_myname, tx)); 503fa9e4066Sahrens 5041d452cf5Sahrens obj = dd->dd_object; 5051d452cf5Sahrens dsl_dir_close(dd, tag); 5061d452cf5Sahrens VERIFY(0 == dmu_object_free(mos, obj, tx)); 507fa9e4066Sahrens } 508fa9e4066Sahrens 509088f3894Sahrens boolean_t 510088f3894Sahrens dsl_dir_is_clone(dsl_dir_t *dd) 511fa9e4066Sahrens { 512088f3894Sahrens return (dd->dd_phys->dd_origin_obj && 513088f3894Sahrens (dd->dd_pool->dp_origin_snap == NULL || 514088f3894Sahrens dd->dd_phys->dd_origin_obj != 515088f3894Sahrens dd->dd_pool->dp_origin_snap->ds_object)); 516fa9e4066Sahrens } 517fa9e4066Sahrens 518fa9e4066Sahrens void 519a2eea2e1Sahrens dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv) 520fa9e4066Sahrens { 521fa9e4066Sahrens mutex_enter(&dd->dd_lock); 52274e7dc98SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USED, 52374e7dc98SMatthew Ahrens dd->dd_phys->dd_used_bytes); 524a9799022Sck dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_QUOTA, dd->dd_phys->dd_quota); 525a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_RESERVATION, 526a2eea2e1Sahrens dd->dd_phys->dd_reserved); 527a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_COMPRESSRATIO, 528a2eea2e1Sahrens dd->dd_phys->dd_compressed_bytes == 0 ? 100 : 529a2eea2e1Sahrens (dd->dd_phys->dd_uncompressed_bytes * 100 / 530a2eea2e1Sahrens dd->dd_phys->dd_compressed_bytes)); 53174e7dc98SMatthew Ahrens if (dd->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN) { 53274e7dc98SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDSNAP, 53374e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[DD_USED_SNAP]); 53474e7dc98SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDDS, 53574e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[DD_USED_HEAD]); 53674e7dc98SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDREFRESERV, 53774e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[DD_USED_REFRSRV]); 53874e7dc98SMatthew Ahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USEDCHILD, 53974e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[DD_USED_CHILD] + 54074e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[DD_USED_CHILD_RSRV]); 54174e7dc98SMatthew Ahrens } 542fa9e4066Sahrens mutex_exit(&dd->dd_lock); 543fa9e4066Sahrens 5444ccbb6e7Sahrens rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER); 545088f3894Sahrens if (dsl_dir_is_clone(dd)) { 546fa9e4066Sahrens dsl_dataset_t *ds; 547a2eea2e1Sahrens char buf[MAXNAMELEN]; 548fa9e4066Sahrens 549745cd3c5Smaybee VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool, 550745cd3c5Smaybee dd->dd_phys->dd_origin_obj, FTAG, &ds)); 551a2eea2e1Sahrens dsl_dataset_name(ds, buf); 552745cd3c5Smaybee dsl_dataset_rele(ds, FTAG); 553a2eea2e1Sahrens dsl_prop_nvlist_add_string(nv, ZFS_PROP_ORIGIN, buf); 554fa9e4066Sahrens } 5554ccbb6e7Sahrens rw_exit(&dd->dd_pool->dp_config_rwlock); 556fa9e4066Sahrens } 557fa9e4066Sahrens 558fa9e4066Sahrens void 559fa9e4066Sahrens dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx) 560fa9e4066Sahrens { 561fa9e4066Sahrens dsl_pool_t *dp = dd->dd_pool; 562fa9e4066Sahrens 563fa9e4066Sahrens ASSERT(dd->dd_phys); 564fa9e4066Sahrens 565fa9e4066Sahrens if (txg_list_add(&dp->dp_dirty_dirs, dd, tx->tx_txg) == 0) { 566fa9e4066Sahrens /* up the hold count until we can be written out */ 567fa9e4066Sahrens dmu_buf_add_ref(dd->dd_dbuf, dd); 568fa9e4066Sahrens } 569fa9e4066Sahrens } 570fa9e4066Sahrens 571fa9e4066Sahrens static int64_t 572fa9e4066Sahrens parent_delta(dsl_dir_t *dd, uint64_t used, int64_t delta) 573fa9e4066Sahrens { 574fa9e4066Sahrens uint64_t old_accounted = MAX(used, dd->dd_phys->dd_reserved); 575fa9e4066Sahrens uint64_t new_accounted = MAX(used + delta, dd->dd_phys->dd_reserved); 576fa9e4066Sahrens return (new_accounted - old_accounted); 577fa9e4066Sahrens } 578fa9e4066Sahrens 579fa9e4066Sahrens void 580fa9e4066Sahrens dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx) 581fa9e4066Sahrens { 582fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 583fa9e4066Sahrens 584fa9e4066Sahrens mutex_enter(&dd->dd_lock); 585b420f3adSRichard Lowe ASSERT3U(dd->dd_tempreserved[tx->tx_txg&TXG_MASK], ==, 0); 586fa9e4066Sahrens dprintf_dd(dd, "txg=%llu towrite=%lluK\n", tx->tx_txg, 587fa9e4066Sahrens dd->dd_space_towrite[tx->tx_txg&TXG_MASK] / 1024); 588fa9e4066Sahrens dd->dd_space_towrite[tx->tx_txg&TXG_MASK] = 0; 589fa9e4066Sahrens mutex_exit(&dd->dd_lock); 590fa9e4066Sahrens 591fa9e4066Sahrens /* release the hold from dsl_dir_dirty */ 592ea8dc4b6Seschrock dmu_buf_rele(dd->dd_dbuf, dd); 593fa9e4066Sahrens } 594fa9e4066Sahrens 595fa9e4066Sahrens static uint64_t 596a9799022Sck dsl_dir_space_towrite(dsl_dir_t *dd) 597fa9e4066Sahrens { 598a9799022Sck uint64_t space = 0; 599fa9e4066Sahrens int i; 600fa9e4066Sahrens 601fa9e4066Sahrens ASSERT(MUTEX_HELD(&dd->dd_lock)); 602fa9e4066Sahrens 603fa9e4066Sahrens for (i = 0; i < TXG_SIZE; i++) { 604fa9e4066Sahrens space += dd->dd_space_towrite[i&TXG_MASK]; 605fa9e4066Sahrens ASSERT3U(dd->dd_space_towrite[i&TXG_MASK], >=, 0); 606fa9e4066Sahrens } 607fa9e4066Sahrens return (space); 608fa9e4066Sahrens } 609fa9e4066Sahrens 610fa9e4066Sahrens /* 611fa9e4066Sahrens * How much space would dd have available if ancestor had delta applied 612fa9e4066Sahrens * to it? If ondiskonly is set, we're only interested in what's 613fa9e4066Sahrens * on-disk, not estimated pending changes. 614fa9e4066Sahrens */ 615a2eea2e1Sahrens uint64_t 616fa9e4066Sahrens dsl_dir_space_available(dsl_dir_t *dd, 617fa9e4066Sahrens dsl_dir_t *ancestor, int64_t delta, int ondiskonly) 618fa9e4066Sahrens { 619fa9e4066Sahrens uint64_t parentspace, myspace, quota, used; 620fa9e4066Sahrens 621fa9e4066Sahrens /* 622fa9e4066Sahrens * If there are no restrictions otherwise, assume we have 623fa9e4066Sahrens * unlimited space available. 624fa9e4066Sahrens */ 625fa9e4066Sahrens quota = UINT64_MAX; 626fa9e4066Sahrens parentspace = UINT64_MAX; 627fa9e4066Sahrens 628fa9e4066Sahrens if (dd->dd_parent != NULL) { 629fa9e4066Sahrens parentspace = dsl_dir_space_available(dd->dd_parent, 630fa9e4066Sahrens ancestor, delta, ondiskonly); 631fa9e4066Sahrens } 632fa9e4066Sahrens 633fa9e4066Sahrens mutex_enter(&dd->dd_lock); 634fa9e4066Sahrens if (dd->dd_phys->dd_quota != 0) 635fa9e4066Sahrens quota = dd->dd_phys->dd_quota; 63674e7dc98SMatthew Ahrens used = dd->dd_phys->dd_used_bytes; 637a9799022Sck if (!ondiskonly) 638a9799022Sck used += dsl_dir_space_towrite(dd); 639fa9e4066Sahrens 640fa9e4066Sahrens if (dd->dd_parent == NULL) { 64199653d4eSeschrock uint64_t poolsize = dsl_pool_adjustedsize(dd->dd_pool, FALSE); 642fa9e4066Sahrens quota = MIN(quota, poolsize); 643fa9e4066Sahrens } 644fa9e4066Sahrens 645fa9e4066Sahrens if (dd->dd_phys->dd_reserved > used && parentspace != UINT64_MAX) { 646fa9e4066Sahrens /* 647fa9e4066Sahrens * We have some space reserved, in addition to what our 648fa9e4066Sahrens * parent gave us. 649fa9e4066Sahrens */ 650fa9e4066Sahrens parentspace += dd->dd_phys->dd_reserved - used; 651fa9e4066Sahrens } 652fa9e4066Sahrens 65374e7dc98SMatthew Ahrens if (dd == ancestor) { 65474e7dc98SMatthew Ahrens ASSERT(delta <= 0); 65574e7dc98SMatthew Ahrens ASSERT(used >= -delta); 65674e7dc98SMatthew Ahrens used += delta; 65774e7dc98SMatthew Ahrens if (parentspace != UINT64_MAX) 65874e7dc98SMatthew Ahrens parentspace -= delta; 65974e7dc98SMatthew Ahrens } 66074e7dc98SMatthew Ahrens 661fa9e4066Sahrens if (used > quota) { 662fa9e4066Sahrens /* over quota */ 663fa9e4066Sahrens myspace = 0; 664fa9e4066Sahrens } else { 665fa9e4066Sahrens /* 66699653d4eSeschrock * the lesser of the space provided by our parent and 66799653d4eSeschrock * the space left in our quota 668fa9e4066Sahrens */ 669fa9e4066Sahrens myspace = MIN(parentspace, quota - used); 670fa9e4066Sahrens } 671fa9e4066Sahrens 672fa9e4066Sahrens mutex_exit(&dd->dd_lock); 673fa9e4066Sahrens 674fa9e4066Sahrens return (myspace); 675fa9e4066Sahrens } 676fa9e4066Sahrens 677fa9e4066Sahrens struct tempreserve { 678fa9e4066Sahrens list_node_t tr_node; 6791ab7f2deSmaybee dsl_pool_t *tr_dp; 680fa9e4066Sahrens dsl_dir_t *tr_ds; 681fa9e4066Sahrens uint64_t tr_size; 682fa9e4066Sahrens }; 683fa9e4066Sahrens 684fa9e4066Sahrens static int 685a9799022Sck dsl_dir_tempreserve_impl(dsl_dir_t *dd, uint64_t asize, boolean_t netfree, 686a9799022Sck boolean_t ignorequota, boolean_t checkrefquota, list_t *tr_list, 6876df6c3bcSck dmu_tx_t *tx, boolean_t first) 688fa9e4066Sahrens { 689fa9e4066Sahrens uint64_t txg = tx->tx_txg; 690a9799022Sck uint64_t est_inflight, used_on_disk, quota, parent_rsrv; 691468c413aSTim Haley uint64_t deferred = 0; 692a9799022Sck struct tempreserve *tr; 693468c413aSTim Haley int retval = EDQUOT; 694fa9e4066Sahrens int txgidx = txg & TXG_MASK; 695fa9e4066Sahrens int i; 6969082849eSck uint64_t ref_rsrv = 0; 697fa9e4066Sahrens 698fa9e4066Sahrens ASSERT3U(txg, !=, 0); 699a9799022Sck ASSERT3S(asize, >, 0); 700fa9e4066Sahrens 701fa9e4066Sahrens mutex_enter(&dd->dd_lock); 702a9799022Sck 703fa9e4066Sahrens /* 704fa9e4066Sahrens * Check against the dsl_dir's quota. We don't add in the delta 705fa9e4066Sahrens * when checking for over-quota because they get one free hit. 706fa9e4066Sahrens */ 707a9799022Sck est_inflight = dsl_dir_space_towrite(dd); 708fa9e4066Sahrens for (i = 0; i < TXG_SIZE; i++) 709a9799022Sck est_inflight += dd->dd_tempreserved[i]; 71074e7dc98SMatthew Ahrens used_on_disk = dd->dd_phys->dd_used_bytes; 711fa9e4066Sahrens 712f4d2e9e6Smaybee /* 7136df6c3bcSck * On the first iteration, fetch the dataset's used-on-disk and 7146df6c3bcSck * refreservation values. Also, if checkrefquota is set, test if 7156df6c3bcSck * allocating this space would exceed the dataset's refquota. 716f4d2e9e6Smaybee */ 7176df6c3bcSck if (first && tx->tx_objset) { 718c3fdb13aSmaybee int error; 719503ad85cSMatthew Ahrens dsl_dataset_t *ds = tx->tx_objset->os_dsl_dataset; 7209082849eSck 721a9799022Sck error = dsl_dataset_check_quota(ds, checkrefquota, 7229082849eSck asize, est_inflight, &used_on_disk, &ref_rsrv); 723a9799022Sck if (error) { 724a9799022Sck mutex_exit(&dd->dd_lock); 725a9799022Sck return (error); 726a9799022Sck } 727a9799022Sck } 728a9799022Sck 729a9799022Sck /* 730a9799022Sck * If this transaction will result in a net free of space, 731a9799022Sck * we want to let it through. 732a9799022Sck */ 733a9799022Sck if (ignorequota || netfree || dd->dd_phys->dd_quota == 0) 734f4d2e9e6Smaybee quota = UINT64_MAX; 735f4d2e9e6Smaybee else 736fa9e4066Sahrens quota = dd->dd_phys->dd_quota; 737fa9e4066Sahrens 738fa9e4066Sahrens /* 739468c413aSTim Haley * Adjust the quota against the actual pool size at the root 740468c413aSTim Haley * minus any outstanding deferred frees. 741f4d2e9e6Smaybee * To ensure that it's possible to remove files from a full 742f4d2e9e6Smaybee * pool without inducing transient overcommits, we throttle 743fa9e4066Sahrens * netfree transactions against a quota that is slightly larger, 744fa9e4066Sahrens * but still within the pool's allocation slop. In cases where 745fa9e4066Sahrens * we're very close to full, this will allow a steady trickle of 746fa9e4066Sahrens * removes to get through. 747fa9e4066Sahrens */ 7481934e92fSmaybee if (dd->dd_parent == NULL) { 749b24ab676SJeff Bonwick spa_t *spa = dd->dd_pool->dp_spa; 750fa9e4066Sahrens uint64_t poolsize = dsl_pool_adjustedsize(dd->dd_pool, netfree); 751b24ab676SJeff Bonwick deferred = metaslab_class_get_deferred(spa_normal_class(spa)); 752468c413aSTim Haley if (poolsize - deferred < quota) { 753468c413aSTim Haley quota = poolsize - deferred; 754468c413aSTim Haley retval = ENOSPC; 755fa9e4066Sahrens } 756fa9e4066Sahrens } 757fa9e4066Sahrens 758fa9e4066Sahrens /* 759fa9e4066Sahrens * If they are requesting more space, and our current estimate 760a9799022Sck * is over quota, they get to try again unless the actual 761ea8dc4b6Seschrock * on-disk is over quota and there are no pending changes (which 762ea8dc4b6Seschrock * may free up space for us). 763fa9e4066Sahrens */ 764468c413aSTim Haley if (used_on_disk + est_inflight >= quota) { 765468c413aSTim Haley if (est_inflight > 0 || used_on_disk < quota || 766468c413aSTim Haley (retval == ENOSPC && used_on_disk < quota + deferred)) 767468c413aSTim Haley retval = ERESTART; 768a9799022Sck dprintf_dd(dd, "failing: used=%lluK inflight = %lluK " 769fa9e4066Sahrens "quota=%lluK tr=%lluK err=%d\n", 770a9799022Sck used_on_disk>>10, est_inflight>>10, 771468c413aSTim Haley quota>>10, asize>>10, retval); 772fa9e4066Sahrens mutex_exit(&dd->dd_lock); 773468c413aSTim Haley return (retval); 774fa9e4066Sahrens } 775fa9e4066Sahrens 776fa9e4066Sahrens /* We need to up our estimated delta before dropping dd_lock */ 777fa9e4066Sahrens dd->dd_tempreserved[txgidx] += asize; 778fa9e4066Sahrens 7799082849eSck parent_rsrv = parent_delta(dd, used_on_disk + est_inflight, 7809082849eSck asize - ref_rsrv); 781fa9e4066Sahrens mutex_exit(&dd->dd_lock); 782fa9e4066Sahrens 7831ab7f2deSmaybee tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP); 784fa9e4066Sahrens tr->tr_ds = dd; 785fa9e4066Sahrens tr->tr_size = asize; 786fa9e4066Sahrens list_insert_tail(tr_list, tr); 787fa9e4066Sahrens 788fa9e4066Sahrens /* see if it's OK with our parent */ 7891934e92fSmaybee if (dd->dd_parent && parent_rsrv) { 7901934e92fSmaybee boolean_t ismos = (dd->dd_phys->dd_head_dataset_obj == 0); 7911934e92fSmaybee 792fa9e4066Sahrens return (dsl_dir_tempreserve_impl(dd->dd_parent, 7936df6c3bcSck parent_rsrv, netfree, ismos, TRUE, tr_list, tx, FALSE)); 794fa9e4066Sahrens } else { 795fa9e4066Sahrens return (0); 796fa9e4066Sahrens } 797fa9e4066Sahrens } 798fa9e4066Sahrens 799fa9e4066Sahrens /* 800fa9e4066Sahrens * Reserve space in this dsl_dir, to be used in this tx's txg. 801a9799022Sck * After the space has been dirtied (and dsl_dir_willuse_space() 802a9799022Sck * has been called), the reservation should be canceled, using 803a9799022Sck * dsl_dir_tempreserve_clear(). 804fa9e4066Sahrens */ 805fa9e4066Sahrens int 806a9799022Sck dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t lsize, uint64_t asize, 807a9799022Sck uint64_t fsize, uint64_t usize, void **tr_cookiep, dmu_tx_t *tx) 808fa9e4066Sahrens { 8091ab7f2deSmaybee int err; 810fa9e4066Sahrens list_t *tr_list; 811fa9e4066Sahrens 812a9799022Sck if (asize == 0) { 813a9799022Sck *tr_cookiep = NULL; 814a9799022Sck return (0); 815a9799022Sck } 816a9799022Sck 817fa9e4066Sahrens tr_list = kmem_alloc(sizeof (list_t), KM_SLEEP); 818fa9e4066Sahrens list_create(tr_list, sizeof (struct tempreserve), 819fa9e4066Sahrens offsetof(struct tempreserve, tr_node)); 820a9799022Sck ASSERT3S(asize, >, 0); 821ea8dc4b6Seschrock ASSERT3S(fsize, >=, 0); 822fa9e4066Sahrens 8231ab7f2deSmaybee err = arc_tempreserve_space(lsize, tx->tx_txg); 824fa9e4066Sahrens if (err == 0) { 825fa9e4066Sahrens struct tempreserve *tr; 826fa9e4066Sahrens 8271ab7f2deSmaybee tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP); 8281ab7f2deSmaybee tr->tr_size = lsize; 8291ab7f2deSmaybee list_insert_tail(tr_list, tr); 8301ab7f2deSmaybee 8311ab7f2deSmaybee err = dsl_pool_tempreserve_space(dd->dd_pool, asize, tx); 8321ab7f2deSmaybee } else { 8331ab7f2deSmaybee if (err == EAGAIN) { 8341ab7f2deSmaybee txg_delay(dd->dd_pool, tx->tx_txg, 1); 8351ab7f2deSmaybee err = ERESTART; 836fa9e4066Sahrens } 8371ab7f2deSmaybee dsl_pool_memory_pressure(dd->dd_pool); 8381ab7f2deSmaybee } 8391ab7f2deSmaybee 8401ab7f2deSmaybee if (err == 0) { 8411ab7f2deSmaybee struct tempreserve *tr; 8421ab7f2deSmaybee 8431ab7f2deSmaybee tr = kmem_zalloc(sizeof (struct tempreserve), KM_SLEEP); 8441ab7f2deSmaybee tr->tr_dp = dd->dd_pool; 8451ab7f2deSmaybee tr->tr_size = asize; 8461ab7f2deSmaybee list_insert_tail(tr_list, tr); 8471ab7f2deSmaybee 8481ab7f2deSmaybee err = dsl_dir_tempreserve_impl(dd, asize, fsize >= asize, 8496df6c3bcSck FALSE, asize > usize, tr_list, tx, TRUE); 850fa9e4066Sahrens } 851fa9e4066Sahrens 852fa9e4066Sahrens if (err) 853fa9e4066Sahrens dsl_dir_tempreserve_clear(tr_list, tx); 854fa9e4066Sahrens else 855fa9e4066Sahrens *tr_cookiep = tr_list; 8561ab7f2deSmaybee 857fa9e4066Sahrens return (err); 858fa9e4066Sahrens } 859fa9e4066Sahrens 860fa9e4066Sahrens /* 861fa9e4066Sahrens * Clear a temporary reservation that we previously made with 862fa9e4066Sahrens * dsl_dir_tempreserve_space(). 863fa9e4066Sahrens */ 864fa9e4066Sahrens void 865fa9e4066Sahrens dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx) 866fa9e4066Sahrens { 867fa9e4066Sahrens int txgidx = tx->tx_txg & TXG_MASK; 868fa9e4066Sahrens list_t *tr_list = tr_cookie; 869fa9e4066Sahrens struct tempreserve *tr; 870fa9e4066Sahrens 871fa9e4066Sahrens ASSERT3U(tx->tx_txg, !=, 0); 872fa9e4066Sahrens 873a9799022Sck if (tr_cookie == NULL) 874a9799022Sck return; 875a9799022Sck 876fa9e4066Sahrens while (tr = list_head(tr_list)) { 8771ab7f2deSmaybee if (tr->tr_dp) { 8781ab7f2deSmaybee dsl_pool_tempreserve_clear(tr->tr_dp, tr->tr_size, tx); 8791ab7f2deSmaybee } else if (tr->tr_ds) { 880fa9e4066Sahrens mutex_enter(&tr->tr_ds->dd_lock); 881fa9e4066Sahrens ASSERT3U(tr->tr_ds->dd_tempreserved[txgidx], >=, 882fa9e4066Sahrens tr->tr_size); 883fa9e4066Sahrens tr->tr_ds->dd_tempreserved[txgidx] -= tr->tr_size; 884fa9e4066Sahrens mutex_exit(&tr->tr_ds->dd_lock); 8851ab7f2deSmaybee } else { 8861ab7f2deSmaybee arc_tempreserve_clear(tr->tr_size); 887fa9e4066Sahrens } 888fa9e4066Sahrens list_remove(tr_list, tr); 889fa9e4066Sahrens kmem_free(tr, sizeof (struct tempreserve)); 890fa9e4066Sahrens } 891fa9e4066Sahrens 892fa9e4066Sahrens kmem_free(tr_list, sizeof (list_t)); 893fa9e4066Sahrens } 894fa9e4066Sahrens 8951ab7f2deSmaybee static void 8961ab7f2deSmaybee dsl_dir_willuse_space_impl(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx) 897fa9e4066Sahrens { 898fa9e4066Sahrens int64_t parent_space; 899fa9e4066Sahrens uint64_t est_used; 900fa9e4066Sahrens 901fa9e4066Sahrens mutex_enter(&dd->dd_lock); 902fa9e4066Sahrens if (space > 0) 903fa9e4066Sahrens dd->dd_space_towrite[tx->tx_txg & TXG_MASK] += space; 904fa9e4066Sahrens 90574e7dc98SMatthew Ahrens est_used = dsl_dir_space_towrite(dd) + dd->dd_phys->dd_used_bytes; 906fa9e4066Sahrens parent_space = parent_delta(dd, est_used, space); 907fa9e4066Sahrens mutex_exit(&dd->dd_lock); 908fa9e4066Sahrens 909fa9e4066Sahrens /* Make sure that we clean up dd_space_to* */ 910fa9e4066Sahrens dsl_dir_dirty(dd, tx); 911fa9e4066Sahrens 912fa9e4066Sahrens /* XXX this is potentially expensive and unnecessary... */ 913fa9e4066Sahrens if (parent_space && dd->dd_parent) 9141ab7f2deSmaybee dsl_dir_willuse_space_impl(dd->dd_parent, parent_space, tx); 9151ab7f2deSmaybee } 9161ab7f2deSmaybee 9171ab7f2deSmaybee /* 9181ab7f2deSmaybee * Call in open context when we think we're going to write/free space, 9191ab7f2deSmaybee * eg. when dirtying data. Be conservative (ie. OK to write less than 9201ab7f2deSmaybee * this or free more than this, but don't write more or free less). 9211ab7f2deSmaybee */ 9221ab7f2deSmaybee void 9231ab7f2deSmaybee dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx) 9241ab7f2deSmaybee { 9251ab7f2deSmaybee dsl_pool_willuse_space(dd->dd_pool, space, tx); 9261ab7f2deSmaybee dsl_dir_willuse_space_impl(dd, space, tx); 927fa9e4066Sahrens } 928fa9e4066Sahrens 929fa9e4066Sahrens /* call from syncing context when we actually write/free space for this dd */ 930fa9e4066Sahrens void 93174e7dc98SMatthew Ahrens dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type, 932fa9e4066Sahrens int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx) 933fa9e4066Sahrens { 934fa9e4066Sahrens int64_t accounted_delta; 93502c8f3f0SMatthew Ahrens boolean_t needlock = !MUTEX_HELD(&dd->dd_lock); 936fa9e4066Sahrens 937fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 93874e7dc98SMatthew Ahrens ASSERT(type < DD_USED_NUM); 939fa9e4066Sahrens 94002c8f3f0SMatthew Ahrens if (needlock) 94102c8f3f0SMatthew Ahrens mutex_enter(&dd->dd_lock); 94274e7dc98SMatthew Ahrens accounted_delta = parent_delta(dd, dd->dd_phys->dd_used_bytes, used); 94374e7dc98SMatthew Ahrens ASSERT(used >= 0 || dd->dd_phys->dd_used_bytes >= -used); 944fa9e4066Sahrens ASSERT(compressed >= 0 || 945fa9e4066Sahrens dd->dd_phys->dd_compressed_bytes >= -compressed); 946fa9e4066Sahrens ASSERT(uncompressed >= 0 || 947fa9e4066Sahrens dd->dd_phys->dd_uncompressed_bytes >= -uncompressed); 948*ce636f8bSMatthew Ahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 94974e7dc98SMatthew Ahrens dd->dd_phys->dd_used_bytes += used; 950fa9e4066Sahrens dd->dd_phys->dd_uncompressed_bytes += uncompressed; 951fa9e4066Sahrens dd->dd_phys->dd_compressed_bytes += compressed; 95274e7dc98SMatthew Ahrens 95374e7dc98SMatthew Ahrens if (dd->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN) { 95474e7dc98SMatthew Ahrens ASSERT(used > 0 || 95574e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[type] >= -used); 95674e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[type] += used; 95774e7dc98SMatthew Ahrens #ifdef DEBUG 95874e7dc98SMatthew Ahrens dd_used_t t; 95974e7dc98SMatthew Ahrens uint64_t u = 0; 96074e7dc98SMatthew Ahrens for (t = 0; t < DD_USED_NUM; t++) 96174e7dc98SMatthew Ahrens u += dd->dd_phys->dd_used_breakdown[t]; 96274e7dc98SMatthew Ahrens ASSERT3U(u, ==, dd->dd_phys->dd_used_bytes); 96374e7dc98SMatthew Ahrens #endif 96474e7dc98SMatthew Ahrens } 96502c8f3f0SMatthew Ahrens if (needlock) 96602c8f3f0SMatthew Ahrens mutex_exit(&dd->dd_lock); 967fa9e4066Sahrens 968fa9e4066Sahrens if (dd->dd_parent != NULL) { 96974e7dc98SMatthew Ahrens dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD, 970fa9e4066Sahrens accounted_delta, compressed, uncompressed, tx); 97174e7dc98SMatthew Ahrens dsl_dir_transfer_space(dd->dd_parent, 97274e7dc98SMatthew Ahrens used - accounted_delta, 97374e7dc98SMatthew Ahrens DD_USED_CHILD_RSRV, DD_USED_CHILD, tx); 974fa9e4066Sahrens } 975fa9e4066Sahrens } 976fa9e4066Sahrens 97774e7dc98SMatthew Ahrens void 97874e7dc98SMatthew Ahrens dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta, 97974e7dc98SMatthew Ahrens dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx) 98074e7dc98SMatthew Ahrens { 98102c8f3f0SMatthew Ahrens boolean_t needlock = !MUTEX_HELD(&dd->dd_lock); 98202c8f3f0SMatthew Ahrens 98374e7dc98SMatthew Ahrens ASSERT(dmu_tx_is_syncing(tx)); 98474e7dc98SMatthew Ahrens ASSERT(oldtype < DD_USED_NUM); 98574e7dc98SMatthew Ahrens ASSERT(newtype < DD_USED_NUM); 98674e7dc98SMatthew Ahrens 98774e7dc98SMatthew Ahrens if (delta == 0 || !(dd->dd_phys->dd_flags & DD_FLAG_USED_BREAKDOWN)) 98874e7dc98SMatthew Ahrens return; 98974e7dc98SMatthew Ahrens 99002c8f3f0SMatthew Ahrens if (needlock) 99102c8f3f0SMatthew Ahrens mutex_enter(&dd->dd_lock); 99274e7dc98SMatthew Ahrens ASSERT(delta > 0 ? 99374e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[oldtype] >= delta : 99474e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[newtype] >= -delta); 99574e7dc98SMatthew Ahrens ASSERT(dd->dd_phys->dd_used_bytes >= ABS(delta)); 996*ce636f8bSMatthew Ahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 99774e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[oldtype] -= delta; 99874e7dc98SMatthew Ahrens dd->dd_phys->dd_used_breakdown[newtype] += delta; 99902c8f3f0SMatthew Ahrens if (needlock) 100002c8f3f0SMatthew Ahrens mutex_exit(&dd->dd_lock); 100174e7dc98SMatthew Ahrens } 100274e7dc98SMatthew Ahrens 1003fa9e4066Sahrens static int 10041d452cf5Sahrens dsl_dir_set_quota_check(void *arg1, void *arg2, dmu_tx_t *tx) 1005fa9e4066Sahrens { 100692241e0bSTom Erickson dsl_dataset_t *ds = arg1; 100792241e0bSTom Erickson dsl_dir_t *dd = ds->ds_dir; 100892241e0bSTom Erickson dsl_prop_setarg_t *psa = arg2; 100992241e0bSTom Erickson int err; 10101d452cf5Sahrens uint64_t towrite; 1011fa9e4066Sahrens 101292241e0bSTom Erickson if ((err = dsl_prop_predict_sync(ds->ds_dir, psa)) != 0) 101392241e0bSTom Erickson return (err); 101492241e0bSTom Erickson 101592241e0bSTom Erickson if (psa->psa_effective_value == 0) 10161d452cf5Sahrens return (0); 1017fa9e4066Sahrens 1018fa9e4066Sahrens mutex_enter(&dd->dd_lock); 10191d452cf5Sahrens /* 10201d452cf5Sahrens * If we are doing the preliminary check in open context, and 10211d452cf5Sahrens * there are pending changes, then don't fail it, since the 1022a9799022Sck * pending changes could under-estimate the amount of space to be 10231d452cf5Sahrens * freed up. 10241d452cf5Sahrens */ 1025a9799022Sck towrite = dsl_dir_space_towrite(dd); 10261d452cf5Sahrens if ((dmu_tx_is_syncing(tx) || towrite == 0) && 102792241e0bSTom Erickson (psa->psa_effective_value < dd->dd_phys->dd_reserved || 102892241e0bSTom Erickson psa->psa_effective_value < dd->dd_phys->dd_used_bytes + towrite)) { 1029fa9e4066Sahrens err = ENOSPC; 1030fa9e4066Sahrens } 1031fa9e4066Sahrens mutex_exit(&dd->dd_lock); 1032fa9e4066Sahrens return (err); 1033fa9e4066Sahrens } 1034fa9e4066Sahrens 10353f9d6ad7SLin Ling extern dsl_syncfunc_t dsl_prop_set_sync; 103692241e0bSTom Erickson 10371d452cf5Sahrens static void 10383f9d6ad7SLin Ling dsl_dir_set_quota_sync(void *arg1, void *arg2, dmu_tx_t *tx) 10391d452cf5Sahrens { 104092241e0bSTom Erickson dsl_dataset_t *ds = arg1; 104192241e0bSTom Erickson dsl_dir_t *dd = ds->ds_dir; 104292241e0bSTom Erickson dsl_prop_setarg_t *psa = arg2; 104392241e0bSTom Erickson uint64_t effective_value = psa->psa_effective_value; 104492241e0bSTom Erickson 10453f9d6ad7SLin Ling dsl_prop_set_sync(ds, psa, tx); 104692241e0bSTom Erickson DSL_PROP_CHECK_PREDICTION(dd, psa); 10471d452cf5Sahrens 10481d452cf5Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 10491d452cf5Sahrens 10501d452cf5Sahrens mutex_enter(&dd->dd_lock); 105192241e0bSTom Erickson dd->dd_phys->dd_quota = effective_value; 10521d452cf5Sahrens mutex_exit(&dd->dd_lock); 1053ecd6cf80Smarks 10544445fffbSMatthew Ahrens spa_history_log_internal_dd(dd, "set quota", tx, 10554445fffbSMatthew Ahrens "quota=%lld", (longlong_t)effective_value); 10561d452cf5Sahrens } 10571d452cf5Sahrens 1058fa9e4066Sahrens int 105992241e0bSTom Erickson dsl_dir_set_quota(const char *ddname, zprop_source_t source, uint64_t quota) 1060fa9e4066Sahrens { 1061fa9e4066Sahrens dsl_dir_t *dd; 106292241e0bSTom Erickson dsl_dataset_t *ds; 106392241e0bSTom Erickson dsl_prop_setarg_t psa; 1064fa9e4066Sahrens int err; 1065fa9e4066Sahrens 106692241e0bSTom Erickson dsl_prop_setarg_init_uint64(&psa, "quota", source, "a); 106792241e0bSTom Erickson 106892241e0bSTom Erickson err = dsl_dataset_hold(ddname, FTAG, &ds); 1069ea8dc4b6Seschrock if (err) 1070ea8dc4b6Seschrock return (err); 1071fa9e4066Sahrens 107292241e0bSTom Erickson err = dsl_dir_open(ddname, FTAG, &dd, NULL); 107392241e0bSTom Erickson if (err) { 107492241e0bSTom Erickson dsl_dataset_rele(ds, FTAG); 107592241e0bSTom Erickson return (err); 1076a9b821a0Sck } 107792241e0bSTom Erickson 107892241e0bSTom Erickson ASSERT(ds->ds_dir == dd); 107992241e0bSTom Erickson 108092241e0bSTom Erickson /* 108192241e0bSTom Erickson * If someone removes a file, then tries to set the quota, we want to 108292241e0bSTom Erickson * make sure the file freeing takes effect. 108392241e0bSTom Erickson */ 108492241e0bSTom Erickson txg_wait_open(dd->dd_pool, 0); 108592241e0bSTom Erickson 108692241e0bSTom Erickson err = dsl_sync_task_do(dd->dd_pool, dsl_dir_set_quota_check, 108792241e0bSTom Erickson dsl_dir_set_quota_sync, ds, &psa, 0); 108892241e0bSTom Erickson 1089fa9e4066Sahrens dsl_dir_close(dd, FTAG); 109092241e0bSTom Erickson dsl_dataset_rele(ds, FTAG); 1091fa9e4066Sahrens return (err); 1092fa9e4066Sahrens } 1093fa9e4066Sahrens 1094a9799022Sck int 10951d452cf5Sahrens dsl_dir_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx) 1096fa9e4066Sahrens { 109792241e0bSTom Erickson dsl_dataset_t *ds = arg1; 109892241e0bSTom Erickson dsl_dir_t *dd = ds->ds_dir; 109992241e0bSTom Erickson dsl_prop_setarg_t *psa = arg2; 110092241e0bSTom Erickson uint64_t effective_value; 1101fa9e4066Sahrens uint64_t used, avail; 110292241e0bSTom Erickson int err; 110392241e0bSTom Erickson 110492241e0bSTom Erickson if ((err = dsl_prop_predict_sync(ds->ds_dir, psa)) != 0) 110592241e0bSTom Erickson return (err); 110692241e0bSTom Erickson 110792241e0bSTom Erickson effective_value = psa->psa_effective_value; 1108fa9e4066Sahrens 11091d452cf5Sahrens /* 11101d452cf5Sahrens * If we are doing the preliminary check in open context, the 11111d452cf5Sahrens * space estimates may be inaccurate. 11121d452cf5Sahrens */ 11131d452cf5Sahrens if (!dmu_tx_is_syncing(tx)) 11141d452cf5Sahrens return (0); 11151d452cf5Sahrens 1116fa9e4066Sahrens mutex_enter(&dd->dd_lock); 111774e7dc98SMatthew Ahrens used = dd->dd_phys->dd_used_bytes; 1118fa9e4066Sahrens mutex_exit(&dd->dd_lock); 1119fa9e4066Sahrens 1120fa9e4066Sahrens if (dd->dd_parent) { 1121fa9e4066Sahrens avail = dsl_dir_space_available(dd->dd_parent, 1122fa9e4066Sahrens NULL, 0, FALSE); 1123fa9e4066Sahrens } else { 1124fa9e4066Sahrens avail = dsl_pool_adjustedsize(dd->dd_pool, B_FALSE) - used; 1125fa9e4066Sahrens } 1126fa9e4066Sahrens 112792241e0bSTom Erickson if (MAX(used, effective_value) > MAX(used, dd->dd_phys->dd_reserved)) { 112892241e0bSTom Erickson uint64_t delta = MAX(used, effective_value) - 1129379c004dSEric Schrock MAX(used, dd->dd_phys->dd_reserved); 1130379c004dSEric Schrock 1131379c004dSEric Schrock if (delta > avail) 1132379c004dSEric Schrock return (ENOSPC); 1133379c004dSEric Schrock if (dd->dd_phys->dd_quota > 0 && 113492241e0bSTom Erickson effective_value > dd->dd_phys->dd_quota) 1135379c004dSEric Schrock return (ENOSPC); 1136379c004dSEric Schrock } 1137379c004dSEric Schrock 11381d452cf5Sahrens return (0); 11391d452cf5Sahrens } 11401d452cf5Sahrens 11411d452cf5Sahrens static void 11424445fffbSMatthew Ahrens dsl_dir_set_reservation_sync_impl(dsl_dir_t *dd, uint64_t value, dmu_tx_t *tx) 11431d452cf5Sahrens { 11441d452cf5Sahrens uint64_t used; 11451d452cf5Sahrens int64_t delta; 11461d452cf5Sahrens 1147a9799022Sck dmu_buf_will_dirty(dd->dd_dbuf, tx); 1148a9799022Sck 11491d452cf5Sahrens mutex_enter(&dd->dd_lock); 115074e7dc98SMatthew Ahrens used = dd->dd_phys->dd_used_bytes; 11514445fffbSMatthew Ahrens delta = MAX(used, value) - MAX(used, dd->dd_phys->dd_reserved); 11524445fffbSMatthew Ahrens dd->dd_phys->dd_reserved = value; 1153fa9e4066Sahrens 1154fa9e4066Sahrens if (dd->dd_parent != NULL) { 1155fa9e4066Sahrens /* Roll up this additional usage into our ancestors */ 115674e7dc98SMatthew Ahrens dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD_RSRV, 115774e7dc98SMatthew Ahrens delta, 0, 0, tx); 1158fa9e4066Sahrens } 115902c8f3f0SMatthew Ahrens mutex_exit(&dd->dd_lock); 11604445fffbSMatthew Ahrens } 11614445fffbSMatthew Ahrens 11624445fffbSMatthew Ahrens 11634445fffbSMatthew Ahrens static void 11644445fffbSMatthew Ahrens dsl_dir_set_reservation_sync(void *arg1, void *arg2, dmu_tx_t *tx) 11654445fffbSMatthew Ahrens { 11664445fffbSMatthew Ahrens dsl_dataset_t *ds = arg1; 11674445fffbSMatthew Ahrens dsl_dir_t *dd = ds->ds_dir; 11684445fffbSMatthew Ahrens dsl_prop_setarg_t *psa = arg2; 11694445fffbSMatthew Ahrens uint64_t value = psa->psa_effective_value; 11704445fffbSMatthew Ahrens 11714445fffbSMatthew Ahrens dsl_prop_set_sync(ds, psa, tx); 11724445fffbSMatthew Ahrens DSL_PROP_CHECK_PREDICTION(dd, psa); 1173ecd6cf80Smarks 11744445fffbSMatthew Ahrens dsl_dir_set_reservation_sync_impl(dd, value, tx); 11754445fffbSMatthew Ahrens 11764445fffbSMatthew Ahrens spa_history_log_internal_dd(dd, "set reservation", tx, 11774445fffbSMatthew Ahrens "reservation=%lld", (longlong_t)value); 1178fa9e4066Sahrens } 1179fa9e4066Sahrens 1180fa9e4066Sahrens int 118192241e0bSTom Erickson dsl_dir_set_reservation(const char *ddname, zprop_source_t source, 118292241e0bSTom Erickson uint64_t reservation) 1183fa9e4066Sahrens { 1184fa9e4066Sahrens dsl_dir_t *dd; 118592241e0bSTom Erickson dsl_dataset_t *ds; 118692241e0bSTom Erickson dsl_prop_setarg_t psa; 1187fa9e4066Sahrens int err; 1188fa9e4066Sahrens 118992241e0bSTom Erickson dsl_prop_setarg_init_uint64(&psa, "reservation", source, &reservation); 119092241e0bSTom Erickson 119192241e0bSTom Erickson err = dsl_dataset_hold(ddname, FTAG, &ds); 1192ea8dc4b6Seschrock if (err) 1193ea8dc4b6Seschrock return (err); 119492241e0bSTom Erickson 119592241e0bSTom Erickson err = dsl_dir_open(ddname, FTAG, &dd, NULL); 119692241e0bSTom Erickson if (err) { 119792241e0bSTom Erickson dsl_dataset_rele(ds, FTAG); 119892241e0bSTom Erickson return (err); 119992241e0bSTom Erickson } 120092241e0bSTom Erickson 120192241e0bSTom Erickson ASSERT(ds->ds_dir == dd); 120292241e0bSTom Erickson 12031d452cf5Sahrens err = dsl_sync_task_do(dd->dd_pool, dsl_dir_set_reservation_check, 120492241e0bSTom Erickson dsl_dir_set_reservation_sync, ds, &psa, 0); 120592241e0bSTom Erickson 1206fa9e4066Sahrens dsl_dir_close(dd, FTAG); 120792241e0bSTom Erickson dsl_dataset_rele(ds, FTAG); 1208fa9e4066Sahrens return (err); 1209fa9e4066Sahrens } 1210fa9e4066Sahrens 1211fa9e4066Sahrens static dsl_dir_t * 1212fa9e4066Sahrens closest_common_ancestor(dsl_dir_t *ds1, dsl_dir_t *ds2) 1213fa9e4066Sahrens { 1214fa9e4066Sahrens for (; ds1; ds1 = ds1->dd_parent) { 1215fa9e4066Sahrens dsl_dir_t *dd; 1216fa9e4066Sahrens for (dd = ds2; dd; dd = dd->dd_parent) { 1217fa9e4066Sahrens if (ds1 == dd) 1218fa9e4066Sahrens return (dd); 1219fa9e4066Sahrens } 1220fa9e4066Sahrens } 1221fa9e4066Sahrens return (NULL); 1222fa9e4066Sahrens } 1223fa9e4066Sahrens 1224fa9e4066Sahrens /* 1225fa9e4066Sahrens * If delta is applied to dd, how much of that delta would be applied to 1226fa9e4066Sahrens * ancestor? Syncing context only. 1227fa9e4066Sahrens */ 1228fa9e4066Sahrens static int64_t 1229fa9e4066Sahrens would_change(dsl_dir_t *dd, int64_t delta, dsl_dir_t *ancestor) 1230fa9e4066Sahrens { 1231fa9e4066Sahrens if (dd == ancestor) 1232fa9e4066Sahrens return (delta); 1233fa9e4066Sahrens 1234fa9e4066Sahrens mutex_enter(&dd->dd_lock); 123574e7dc98SMatthew Ahrens delta = parent_delta(dd, dd->dd_phys->dd_used_bytes, delta); 1236fa9e4066Sahrens mutex_exit(&dd->dd_lock); 1237fa9e4066Sahrens return (would_change(dd->dd_parent, delta, ancestor)); 1238fa9e4066Sahrens } 1239fa9e4066Sahrens 12401d452cf5Sahrens struct renamearg { 12411d452cf5Sahrens dsl_dir_t *newparent; 12421d452cf5Sahrens const char *mynewname; 12431d452cf5Sahrens }; 12441d452cf5Sahrens 12451d452cf5Sahrens static int 12461d452cf5Sahrens dsl_dir_rename_check(void *arg1, void *arg2, dmu_tx_t *tx) 1247fa9e4066Sahrens { 12481d452cf5Sahrens dsl_dir_t *dd = arg1; 12491d452cf5Sahrens struct renamearg *ra = arg2; 1250fa9e4066Sahrens dsl_pool_t *dp = dd->dd_pool; 1251fa9e4066Sahrens objset_t *mos = dp->dp_meta_objset; 12521d452cf5Sahrens int err; 12531d452cf5Sahrens uint64_t val; 1254fa9e4066Sahrens 1255b91a2f0bSMatthew Ahrens /* 1256b91a2f0bSMatthew Ahrens * There should only be one reference, from dmu_objset_rename(). 1257b91a2f0bSMatthew Ahrens * Fleeting holds are also possible (eg, from "zfs list" getting 1258b91a2f0bSMatthew Ahrens * stats), but any that are present in open context will likely 1259b91a2f0bSMatthew Ahrens * be gone by syncing context, so only fail from syncing 1260b91a2f0bSMatthew Ahrens * context. 1261b91a2f0bSMatthew Ahrens */ 1262b91a2f0bSMatthew Ahrens if (dmu_tx_is_syncing(tx) && dmu_buf_refcount(dd->dd_dbuf) > 1) 1263fa9e4066Sahrens return (EBUSY); 1264fa9e4066Sahrens 12651d452cf5Sahrens /* check for existing name */ 12661d452cf5Sahrens err = zap_lookup(mos, ra->newparent->dd_phys->dd_child_dir_zapobj, 12671d452cf5Sahrens ra->mynewname, 8, 1, &val); 12681d452cf5Sahrens if (err == 0) 12691d452cf5Sahrens return (EEXIST); 12701d452cf5Sahrens if (err != ENOENT) 12711d452cf5Sahrens return (err); 12721d452cf5Sahrens 12731d452cf5Sahrens if (ra->newparent != dd->dd_parent) { 127499653d4eSeschrock /* is there enough space? */ 127599653d4eSeschrock uint64_t myspace = 127674e7dc98SMatthew Ahrens MAX(dd->dd_phys->dd_used_bytes, dd->dd_phys->dd_reserved); 1277fa9e4066Sahrens 12781d452cf5Sahrens /* no rename into our descendant */ 12791d452cf5Sahrens if (closest_common_ancestor(dd, ra->newparent) == dd) 1280fa9e4066Sahrens return (EINVAL); 1281fa9e4066Sahrens 12821d452cf5Sahrens if (err = dsl_dir_transfer_possible(dd->dd_parent, 12831d452cf5Sahrens ra->newparent, myspace)) 128499653d4eSeschrock return (err); 12851d452cf5Sahrens } 1286fa9e4066Sahrens 12871d452cf5Sahrens return (0); 12881d452cf5Sahrens } 12891d452cf5Sahrens 12901d452cf5Sahrens static void 12913f9d6ad7SLin Ling dsl_dir_rename_sync(void *arg1, void *arg2, dmu_tx_t *tx) 12921d452cf5Sahrens { 12931d452cf5Sahrens dsl_dir_t *dd = arg1; 12941d452cf5Sahrens struct renamearg *ra = arg2; 12951d452cf5Sahrens dsl_pool_t *dp = dd->dd_pool; 12961d452cf5Sahrens objset_t *mos = dp->dp_meta_objset; 12971d452cf5Sahrens int err; 12984445fffbSMatthew Ahrens char namebuf[MAXNAMELEN]; 12991d452cf5Sahrens 13001d452cf5Sahrens ASSERT(dmu_buf_refcount(dd->dd_dbuf) <= 2); 13011d452cf5Sahrens 13024445fffbSMatthew Ahrens /* Log this before we change the name. */ 13034445fffbSMatthew Ahrens dsl_dir_name(ra->newparent, namebuf); 13044445fffbSMatthew Ahrens spa_history_log_internal_dd(dd, "rename", tx, 13054445fffbSMatthew Ahrens "-> %s/%s", namebuf, ra->mynewname); 13064445fffbSMatthew Ahrens 13071d452cf5Sahrens if (ra->newparent != dd->dd_parent) { 130874e7dc98SMatthew Ahrens dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD, 130974e7dc98SMatthew Ahrens -dd->dd_phys->dd_used_bytes, 1310fa9e4066Sahrens -dd->dd_phys->dd_compressed_bytes, 1311fa9e4066Sahrens -dd->dd_phys->dd_uncompressed_bytes, tx); 131274e7dc98SMatthew Ahrens dsl_dir_diduse_space(ra->newparent, DD_USED_CHILD, 131374e7dc98SMatthew Ahrens dd->dd_phys->dd_used_bytes, 1314fa9e4066Sahrens dd->dd_phys->dd_compressed_bytes, 1315fa9e4066Sahrens dd->dd_phys->dd_uncompressed_bytes, tx); 131674e7dc98SMatthew Ahrens 131774e7dc98SMatthew Ahrens if (dd->dd_phys->dd_reserved > dd->dd_phys->dd_used_bytes) { 131874e7dc98SMatthew Ahrens uint64_t unused_rsrv = dd->dd_phys->dd_reserved - 131974e7dc98SMatthew Ahrens dd->dd_phys->dd_used_bytes; 132074e7dc98SMatthew Ahrens 132174e7dc98SMatthew Ahrens dsl_dir_diduse_space(dd->dd_parent, DD_USED_CHILD_RSRV, 132274e7dc98SMatthew Ahrens -unused_rsrv, 0, 0, tx); 132374e7dc98SMatthew Ahrens dsl_dir_diduse_space(ra->newparent, DD_USED_CHILD_RSRV, 132474e7dc98SMatthew Ahrens unused_rsrv, 0, 0, tx); 132574e7dc98SMatthew Ahrens } 1326fa9e4066Sahrens } 1327fa9e4066Sahrens 1328fa9e4066Sahrens dmu_buf_will_dirty(dd->dd_dbuf, tx); 1329fa9e4066Sahrens 1330fa9e4066Sahrens /* remove from old parent zapobj */ 1331fa9e4066Sahrens err = zap_remove(mos, dd->dd_parent->dd_phys->dd_child_dir_zapobj, 1332fa9e4066Sahrens dd->dd_myname, tx); 1333b420f3adSRichard Lowe ASSERT3U(err, ==, 0); 1334fa9e4066Sahrens 13351d452cf5Sahrens (void) strcpy(dd->dd_myname, ra->mynewname); 1336fa9e4066Sahrens dsl_dir_close(dd->dd_parent, dd); 13371d452cf5Sahrens dd->dd_phys->dd_parent_obj = ra->newparent->dd_object; 1338ea8dc4b6Seschrock VERIFY(0 == dsl_dir_open_obj(dd->dd_pool, 13391d452cf5Sahrens ra->newparent->dd_object, NULL, dd, &dd->dd_parent)); 1340fa9e4066Sahrens 1341fa9e4066Sahrens /* add to new parent zapobj */ 13421d452cf5Sahrens err = zap_add(mos, ra->newparent->dd_phys->dd_child_dir_zapobj, 1343fa9e4066Sahrens dd->dd_myname, 8, 1, &dd->dd_object, tx); 1344b420f3adSRichard Lowe ASSERT3U(err, ==, 0); 1345ecd6cf80Smarks 13461d452cf5Sahrens } 1347fa9e4066Sahrens 13481d452cf5Sahrens int 13491d452cf5Sahrens dsl_dir_rename(dsl_dir_t *dd, const char *newname) 13501d452cf5Sahrens { 13511d452cf5Sahrens struct renamearg ra; 13521d452cf5Sahrens int err; 13531d452cf5Sahrens 13541d452cf5Sahrens /* new parent should exist */ 13551d452cf5Sahrens err = dsl_dir_open(newname, FTAG, &ra.newparent, &ra.mynewname); 13561d452cf5Sahrens if (err) 13571d452cf5Sahrens return (err); 13581d452cf5Sahrens 13591d452cf5Sahrens /* can't rename to different pool */ 13601d452cf5Sahrens if (dd->dd_pool != ra.newparent->dd_pool) { 13611d452cf5Sahrens err = ENXIO; 13621d452cf5Sahrens goto out; 13631d452cf5Sahrens } 13641d452cf5Sahrens 13651d452cf5Sahrens /* new name should not already exist */ 13661d452cf5Sahrens if (ra.mynewname == NULL) { 13671d452cf5Sahrens err = EEXIST; 13681d452cf5Sahrens goto out; 13691d452cf5Sahrens } 13701d452cf5Sahrens 13711d452cf5Sahrens err = dsl_sync_task_do(dd->dd_pool, 13721d452cf5Sahrens dsl_dir_rename_check, dsl_dir_rename_sync, dd, &ra, 3); 13731d452cf5Sahrens 13741d452cf5Sahrens out: 13751d452cf5Sahrens dsl_dir_close(ra.newparent, FTAG); 13761d452cf5Sahrens return (err); 1377fa9e4066Sahrens } 137899653d4eSeschrock 137999653d4eSeschrock int 138099653d4eSeschrock dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space) 138199653d4eSeschrock { 138299653d4eSeschrock dsl_dir_t *ancestor; 138399653d4eSeschrock int64_t adelta; 138499653d4eSeschrock uint64_t avail; 138599653d4eSeschrock 138699653d4eSeschrock ancestor = closest_common_ancestor(sdd, tdd); 138799653d4eSeschrock adelta = would_change(sdd, -space, ancestor); 138899653d4eSeschrock avail = dsl_dir_space_available(tdd, ancestor, adelta, FALSE); 138999653d4eSeschrock if (avail < space) 139099653d4eSeschrock return (ENOSPC); 139199653d4eSeschrock 139299653d4eSeschrock return (0); 139399653d4eSeschrock } 139471eb0538SChris Kirby 139571eb0538SChris Kirby timestruc_t 139671eb0538SChris Kirby dsl_dir_snap_cmtime(dsl_dir_t *dd) 139771eb0538SChris Kirby { 139871eb0538SChris Kirby timestruc_t t; 139971eb0538SChris Kirby 140071eb0538SChris Kirby mutex_enter(&dd->dd_lock); 140171eb0538SChris Kirby t = dd->dd_snap_cmtime; 140271eb0538SChris Kirby mutex_exit(&dd->dd_lock); 140371eb0538SChris Kirby 140471eb0538SChris Kirby return (t); 140571eb0538SChris Kirby } 140671eb0538SChris Kirby 140771eb0538SChris Kirby void 140871eb0538SChris Kirby dsl_dir_snap_cmtime_update(dsl_dir_t *dd) 140971eb0538SChris Kirby { 141071eb0538SChris Kirby timestruc_t t; 141171eb0538SChris Kirby 141271eb0538SChris Kirby gethrestime(&t); 141371eb0538SChris Kirby mutex_enter(&dd->dd_lock); 141471eb0538SChris Kirby dd->dd_snap_cmtime = t; 141571eb0538SChris Kirby mutex_exit(&dd->dd_lock); 141671eb0538SChris Kirby } 1417