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 /* 22c717a561Smaybee * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 27fa9e4066Sahrens 28ecd6cf80Smarks #include <sys/cred.h> 29fa9e4066Sahrens #include <sys/zfs_context.h> 30fa9e4066Sahrens #include <sys/dmu_objset.h> 31fa9e4066Sahrens #include <sys/dsl_dir.h> 32fa9e4066Sahrens #include <sys/dsl_dataset.h> 33fa9e4066Sahrens #include <sys/dsl_prop.h> 34fa9e4066Sahrens #include <sys/dsl_pool.h> 351d452cf5Sahrens #include <sys/dsl_synctask.h> 36ecd6cf80Smarks #include <sys/dsl_deleg.h> 37fa9e4066Sahrens #include <sys/dnode.h> 38fa9e4066Sahrens #include <sys/dbuf.h> 39a2eea2e1Sahrens #include <sys/zvol.h> 40fa9e4066Sahrens #include <sys/dmu_tx.h> 41fa9e4066Sahrens #include <sys/zio_checksum.h> 42fa9e4066Sahrens #include <sys/zap.h> 43fa9e4066Sahrens #include <sys/zil.h> 44fa9e4066Sahrens #include <sys/dmu_impl.h> 45ecd6cf80Smarks #include <sys/zfs_ioctl.h> 46fa9e4066Sahrens 47fa9e4066Sahrens spa_t * 48fa9e4066Sahrens dmu_objset_spa(objset_t *os) 49fa9e4066Sahrens { 50fa9e4066Sahrens return (os->os->os_spa); 51fa9e4066Sahrens } 52fa9e4066Sahrens 53fa9e4066Sahrens zilog_t * 54fa9e4066Sahrens dmu_objset_zil(objset_t *os) 55fa9e4066Sahrens { 56fa9e4066Sahrens return (os->os->os_zil); 57fa9e4066Sahrens } 58fa9e4066Sahrens 59fa9e4066Sahrens dsl_pool_t * 60fa9e4066Sahrens dmu_objset_pool(objset_t *os) 61fa9e4066Sahrens { 62fa9e4066Sahrens dsl_dataset_t *ds; 63fa9e4066Sahrens 64fa9e4066Sahrens if ((ds = os->os->os_dsl_dataset) != NULL && ds->ds_dir) 65fa9e4066Sahrens return (ds->ds_dir->dd_pool); 66fa9e4066Sahrens else 67fa9e4066Sahrens return (spa_get_dsl(os->os->os_spa)); 68fa9e4066Sahrens } 69fa9e4066Sahrens 70fa9e4066Sahrens dsl_dataset_t * 71fa9e4066Sahrens dmu_objset_ds(objset_t *os) 72fa9e4066Sahrens { 73fa9e4066Sahrens return (os->os->os_dsl_dataset); 74fa9e4066Sahrens } 75fa9e4066Sahrens 76fa9e4066Sahrens dmu_objset_type_t 77fa9e4066Sahrens dmu_objset_type(objset_t *os) 78fa9e4066Sahrens { 79fa9e4066Sahrens return (os->os->os_phys->os_type); 80fa9e4066Sahrens } 81fa9e4066Sahrens 82fa9e4066Sahrens void 83fa9e4066Sahrens dmu_objset_name(objset_t *os, char *buf) 84fa9e4066Sahrens { 85fa9e4066Sahrens dsl_dataset_name(os->os->os_dsl_dataset, buf); 86fa9e4066Sahrens } 87fa9e4066Sahrens 88fa9e4066Sahrens uint64_t 89fa9e4066Sahrens dmu_objset_id(objset_t *os) 90fa9e4066Sahrens { 91fa9e4066Sahrens dsl_dataset_t *ds = os->os->os_dsl_dataset; 92fa9e4066Sahrens 93fa9e4066Sahrens return (ds ? ds->ds_object : 0); 94fa9e4066Sahrens } 95fa9e4066Sahrens 96fa9e4066Sahrens static void 97fa9e4066Sahrens checksum_changed_cb(void *arg, uint64_t newval) 98fa9e4066Sahrens { 99fa9e4066Sahrens objset_impl_t *osi = arg; 100fa9e4066Sahrens 101fa9e4066Sahrens /* 102fa9e4066Sahrens * Inheritance should have been done by now. 103fa9e4066Sahrens */ 104fa9e4066Sahrens ASSERT(newval != ZIO_CHECKSUM_INHERIT); 105fa9e4066Sahrens 106fa9e4066Sahrens osi->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE); 107fa9e4066Sahrens } 108fa9e4066Sahrens 109fa9e4066Sahrens static void 110fa9e4066Sahrens compression_changed_cb(void *arg, uint64_t newval) 111fa9e4066Sahrens { 112fa9e4066Sahrens objset_impl_t *osi = arg; 113fa9e4066Sahrens 114fa9e4066Sahrens /* 115fa9e4066Sahrens * Inheritance and range checking should have been done by now. 116fa9e4066Sahrens */ 117fa9e4066Sahrens ASSERT(newval != ZIO_COMPRESS_INHERIT); 118fa9e4066Sahrens 119fa9e4066Sahrens osi->os_compress = zio_compress_select(newval, ZIO_COMPRESS_ON_VALUE); 120fa9e4066Sahrens } 121fa9e4066Sahrens 122d0ad202dSahrens static void 123d0ad202dSahrens copies_changed_cb(void *arg, uint64_t newval) 124d0ad202dSahrens { 125d0ad202dSahrens objset_impl_t *osi = arg; 126d0ad202dSahrens 127d0ad202dSahrens /* 128d0ad202dSahrens * Inheritance and range checking should have been done by now. 129d0ad202dSahrens */ 130d0ad202dSahrens ASSERT(newval > 0); 131d0ad202dSahrens ASSERT(newval <= spa_max_replication(osi->os_spa)); 132d0ad202dSahrens 133d0ad202dSahrens osi->os_copies = newval; 134d0ad202dSahrens } 135d0ad202dSahrens 136fa9e4066Sahrens void 137fa9e4066Sahrens dmu_objset_byteswap(void *buf, size_t size) 138fa9e4066Sahrens { 139fa9e4066Sahrens objset_phys_t *osp = buf; 140fa9e4066Sahrens 141fa9e4066Sahrens ASSERT(size == sizeof (objset_phys_t)); 142fa9e4066Sahrens dnode_byteswap(&osp->os_meta_dnode); 143fa9e4066Sahrens byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t)); 144fa9e4066Sahrens osp->os_type = BSWAP_64(osp->os_type); 145fa9e4066Sahrens } 146fa9e4066Sahrens 147ea8dc4b6Seschrock int 148ea8dc4b6Seschrock dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 149ea8dc4b6Seschrock objset_impl_t **osip) 150fa9e4066Sahrens { 15191ebeef5Sahrens objset_impl_t *osi; 152fa9e4066Sahrens int i, err, checksum; 153fa9e4066Sahrens 15491ebeef5Sahrens ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock)); 15591ebeef5Sahrens 156fa9e4066Sahrens osi = kmem_zalloc(sizeof (objset_impl_t), KM_SLEEP); 157fa9e4066Sahrens osi->os.os = osi; 158fa9e4066Sahrens osi->os_dsl_dataset = ds; 159fa9e4066Sahrens osi->os_spa = spa; 160c717a561Smaybee osi->os_rootbp = bp; 161c717a561Smaybee if (!BP_IS_HOLE(osi->os_rootbp)) { 16213506d1eSmaybee uint32_t aflags = ARC_WAIT; 163ea8dc4b6Seschrock zbookmark_t zb; 164ea8dc4b6Seschrock zb.zb_objset = ds ? ds->ds_object : 0; 165ea8dc4b6Seschrock zb.zb_object = 0; 166ea8dc4b6Seschrock zb.zb_level = -1; 167ea8dc4b6Seschrock zb.zb_blkid = 0; 168ea8dc4b6Seschrock 169c717a561Smaybee dprintf_bp(osi->os_rootbp, "reading %s", ""); 170c717a561Smaybee err = arc_read(NULL, spa, osi->os_rootbp, 171fa9e4066Sahrens dmu_ot[DMU_OT_OBJSET].ot_byteswap, 172c717a561Smaybee arc_getbuf_func, &osi->os_phys_buf, 17313506d1eSmaybee ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &aflags, &zb); 174ea8dc4b6Seschrock if (err) { 175ea8dc4b6Seschrock kmem_free(osi, sizeof (objset_impl_t)); 176ea8dc4b6Seschrock return (err); 177ea8dc4b6Seschrock } 178c717a561Smaybee osi->os_phys = osi->os_phys_buf->b_data; 179bd00f61bSrm if (ds == NULL || dsl_dataset_is_snapshot(ds) == 0) 180bd00f61bSrm arc_release(osi->os_phys_buf, &osi->os_phys_buf); 181fa9e4066Sahrens } else { 182c717a561Smaybee osi->os_phys_buf = arc_buf_alloc(spa, sizeof (objset_phys_t), 183c717a561Smaybee &osi->os_phys_buf, ARC_BUFC_METADATA); 184c717a561Smaybee osi->os_phys = osi->os_phys_buf->b_data; 185fa9e4066Sahrens bzero(osi->os_phys, sizeof (objset_phys_t)); 186fa9e4066Sahrens } 187fa9e4066Sahrens 188fa9e4066Sahrens /* 189fa9e4066Sahrens * Note: the changed_cb will be called once before the register 190fa9e4066Sahrens * func returns, thus changing the checksum/compression from the 19199653d4eSeschrock * default (fletcher2/off). Snapshots don't need to know, and 19299653d4eSeschrock * registering would complicate clone promotion. 193fa9e4066Sahrens */ 19499653d4eSeschrock if (ds && ds->ds_phys->ds_num_children == 0) { 195fa9e4066Sahrens err = dsl_prop_register(ds, "checksum", 196fa9e4066Sahrens checksum_changed_cb, osi); 197ea8dc4b6Seschrock if (err == 0) 198ea8dc4b6Seschrock err = dsl_prop_register(ds, "compression", 199ea8dc4b6Seschrock compression_changed_cb, osi); 200d0ad202dSahrens if (err == 0) 201d0ad202dSahrens err = dsl_prop_register(ds, "copies", 202d0ad202dSahrens copies_changed_cb, osi); 203ea8dc4b6Seschrock if (err) { 204c717a561Smaybee VERIFY(arc_buf_remove_ref(osi->os_phys_buf, 205c717a561Smaybee &osi->os_phys_buf) == 1); 206ea8dc4b6Seschrock kmem_free(osi, sizeof (objset_impl_t)); 207ea8dc4b6Seschrock return (err); 208ea8dc4b6Seschrock } 20999653d4eSeschrock } else if (ds == NULL) { 210fa9e4066Sahrens /* It's the meta-objset. */ 211fa9e4066Sahrens osi->os_checksum = ZIO_CHECKSUM_FLETCHER_4; 212ea8dc4b6Seschrock osi->os_compress = ZIO_COMPRESS_LZJB; 213d0ad202dSahrens osi->os_copies = spa_max_replication(spa); 214fa9e4066Sahrens } 215fa9e4066Sahrens 216ea8dc4b6Seschrock osi->os_zil = zil_alloc(&osi->os, &osi->os_phys->os_zil_header); 217ea8dc4b6Seschrock 218fa9e4066Sahrens /* 219fa9e4066Sahrens * Metadata always gets compressed and checksummed. 220fa9e4066Sahrens * If the data checksum is multi-bit correctable, and it's not 221fa9e4066Sahrens * a ZBT-style checksum, then it's suitable for metadata as well. 222fa9e4066Sahrens * Otherwise, the metadata checksum defaults to fletcher4. 223fa9e4066Sahrens */ 224fa9e4066Sahrens checksum = osi->os_checksum; 225fa9e4066Sahrens 226fa9e4066Sahrens if (zio_checksum_table[checksum].ci_correctable && 227fa9e4066Sahrens !zio_checksum_table[checksum].ci_zbt) 228fa9e4066Sahrens osi->os_md_checksum = checksum; 229fa9e4066Sahrens else 230fa9e4066Sahrens osi->os_md_checksum = ZIO_CHECKSUM_FLETCHER_4; 231ea8dc4b6Seschrock osi->os_md_compress = ZIO_COMPRESS_LZJB; 232fa9e4066Sahrens 233fa9e4066Sahrens for (i = 0; i < TXG_SIZE; i++) { 234fa9e4066Sahrens list_create(&osi->os_dirty_dnodes[i], sizeof (dnode_t), 235fa9e4066Sahrens offsetof(dnode_t, dn_dirty_link[i])); 236fa9e4066Sahrens list_create(&osi->os_free_dnodes[i], sizeof (dnode_t), 237fa9e4066Sahrens offsetof(dnode_t, dn_dirty_link[i])); 238fa9e4066Sahrens } 239fa9e4066Sahrens list_create(&osi->os_dnodes, sizeof (dnode_t), 240fa9e4066Sahrens offsetof(dnode_t, dn_link)); 241fa9e4066Sahrens list_create(&osi->os_downgraded_dbufs, sizeof (dmu_buf_impl_t), 242fa9e4066Sahrens offsetof(dmu_buf_impl_t, db_link)); 243fa9e4066Sahrens 2445ad82045Snd mutex_init(&osi->os_lock, NULL, MUTEX_DEFAULT, NULL); 2455ad82045Snd mutex_init(&osi->os_obj_lock, NULL, MUTEX_DEFAULT, NULL); 246f18faf3fSek mutex_init(&osi->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL); 2475ad82045Snd 248fa9e4066Sahrens osi->os_meta_dnode = dnode_special_open(osi, 249fa9e4066Sahrens &osi->os_phys->os_meta_dnode, DMU_META_DNODE_OBJECT); 250fa9e4066Sahrens 25191ebeef5Sahrens /* 25291ebeef5Sahrens * We should be the only thread trying to do this because we 25391ebeef5Sahrens * have ds_opening_lock 25491ebeef5Sahrens */ 25591ebeef5Sahrens if (ds) { 25691ebeef5Sahrens VERIFY(NULL == dsl_dataset_set_user_ptr(ds, osi, 25791ebeef5Sahrens dmu_objset_evict)); 258fa9e4066Sahrens } 259fa9e4066Sahrens 260ea8dc4b6Seschrock *osip = osi; 261ea8dc4b6Seschrock return (0); 262fa9e4066Sahrens } 263fa9e4066Sahrens 264*3cb34c60Sahrens static int 265*3cb34c60Sahrens dmu_objset_open_ds_os(dsl_dataset_t *ds, objset_t *os, dmu_objset_type_t type) 266*3cb34c60Sahrens { 267*3cb34c60Sahrens objset_impl_t *osi; 268*3cb34c60Sahrens int err; 269*3cb34c60Sahrens 270*3cb34c60Sahrens mutex_enter(&ds->ds_opening_lock); 271*3cb34c60Sahrens osi = dsl_dataset_get_user_ptr(ds); 272*3cb34c60Sahrens if (osi == NULL) { 273*3cb34c60Sahrens err = dmu_objset_open_impl(dsl_dataset_get_spa(ds), 274*3cb34c60Sahrens ds, &ds->ds_phys->ds_bp, &osi); 275*3cb34c60Sahrens if (err) 276*3cb34c60Sahrens return (err); 277*3cb34c60Sahrens } 278*3cb34c60Sahrens mutex_exit(&ds->ds_opening_lock); 279*3cb34c60Sahrens 280*3cb34c60Sahrens os->os = osi; 281*3cb34c60Sahrens os->os_mode = DS_MODE_NONE; 282*3cb34c60Sahrens 283*3cb34c60Sahrens if (type != DMU_OST_ANY && type != os->os->os_phys->os_type) 284*3cb34c60Sahrens return (EINVAL); 285*3cb34c60Sahrens return (0); 286*3cb34c60Sahrens } 287*3cb34c60Sahrens 288*3cb34c60Sahrens int 289*3cb34c60Sahrens dmu_objset_open_ds(dsl_dataset_t *ds, dmu_objset_type_t type, objset_t **osp) 290*3cb34c60Sahrens { 291*3cb34c60Sahrens objset_t *os; 292*3cb34c60Sahrens int err; 293*3cb34c60Sahrens 294*3cb34c60Sahrens os = kmem_alloc(sizeof (objset_t), KM_SLEEP); 295*3cb34c60Sahrens err = dmu_objset_open_ds_os(ds, os, type); 296*3cb34c60Sahrens if (err) 297*3cb34c60Sahrens kmem_free(os, sizeof (objset_t)); 298*3cb34c60Sahrens else 299*3cb34c60Sahrens *osp = os; 300*3cb34c60Sahrens return (err); 301*3cb34c60Sahrens } 302*3cb34c60Sahrens 303fa9e4066Sahrens /* called from zpl */ 304fa9e4066Sahrens int 305fa9e4066Sahrens dmu_objset_open(const char *name, dmu_objset_type_t type, int mode, 306fa9e4066Sahrens objset_t **osp) 307fa9e4066Sahrens { 308fa9e4066Sahrens objset_t *os; 309f18faf3fSek dsl_dataset_t *ds; 310f18faf3fSek int err; 311fa9e4066Sahrens 312*3cb34c60Sahrens ASSERT(mode != DS_MODE_NONE); 313*3cb34c60Sahrens 314fa9e4066Sahrens os = kmem_alloc(sizeof (objset_t), KM_SLEEP); 315fa9e4066Sahrens err = dsl_dataset_open(name, mode, os, &ds); 316fa9e4066Sahrens if (err) { 317fa9e4066Sahrens kmem_free(os, sizeof (objset_t)); 318fa9e4066Sahrens return (err); 319fa9e4066Sahrens } 320fa9e4066Sahrens 321*3cb34c60Sahrens err = dmu_objset_open_ds_os(ds, os, type); 322fa9e4066Sahrens os->os_mode = mode; 323*3cb34c60Sahrens if (err) { 324*3cb34c60Sahrens kmem_free(os, sizeof (objset_t)); 325*3cb34c60Sahrens dsl_dataset_close(ds, mode, os); 326*3cb34c60Sahrens } else { 327*3cb34c60Sahrens *osp = os; 328fa9e4066Sahrens } 329*3cb34c60Sahrens return (err); 330fa9e4066Sahrens } 331fa9e4066Sahrens 332fa9e4066Sahrens void 333fa9e4066Sahrens dmu_objset_close(objset_t *os) 334fa9e4066Sahrens { 335*3cb34c60Sahrens if (os->os_mode != DS_MODE_NONE) 336*3cb34c60Sahrens dsl_dataset_close(os->os->os_dsl_dataset, os->os_mode, os); 337fa9e4066Sahrens kmem_free(os, sizeof (objset_t)); 338fa9e4066Sahrens } 339fa9e4066Sahrens 340436b2950Sperrin int 3411934e92fSmaybee dmu_objset_evict_dbufs(objset_t *os) 342ea8dc4b6Seschrock { 343ea8dc4b6Seschrock objset_impl_t *osi = os->os; 344ea8dc4b6Seschrock dnode_t *dn; 345c543ec06Sahrens 346c543ec06Sahrens mutex_enter(&osi->os_lock); 347c543ec06Sahrens 348c543ec06Sahrens /* process the mdn last, since the other dnodes have holds on it */ 349c543ec06Sahrens list_remove(&osi->os_dnodes, osi->os_meta_dnode); 350c543ec06Sahrens list_insert_tail(&osi->os_dnodes, osi->os_meta_dnode); 351ea8dc4b6Seschrock 352ea8dc4b6Seschrock /* 353c543ec06Sahrens * Find the first dnode with holds. We have to do this dance 354c543ec06Sahrens * because dnode_add_ref() only works if you already have a 355c543ec06Sahrens * hold. If there are no holds then it has no dbufs so OK to 356c543ec06Sahrens * skip. 357ea8dc4b6Seschrock */ 358c543ec06Sahrens for (dn = list_head(&osi->os_dnodes); 3591934e92fSmaybee dn && !dnode_add_ref(dn, FTAG); 360c543ec06Sahrens dn = list_next(&osi->os_dnodes, dn)) 361c543ec06Sahrens continue; 362c543ec06Sahrens 363c543ec06Sahrens while (dn) { 364c543ec06Sahrens dnode_t *next_dn = dn; 365c543ec06Sahrens 366c543ec06Sahrens do { 367c543ec06Sahrens next_dn = list_next(&osi->os_dnodes, next_dn); 3681934e92fSmaybee } while (next_dn && !dnode_add_ref(next_dn, FTAG)); 369c543ec06Sahrens 370c543ec06Sahrens mutex_exit(&osi->os_lock); 3711934e92fSmaybee dnode_evict_dbufs(dn); 372c543ec06Sahrens dnode_rele(dn, FTAG); 373c543ec06Sahrens mutex_enter(&osi->os_lock); 374c543ec06Sahrens dn = next_dn; 375ea8dc4b6Seschrock } 376ea8dc4b6Seschrock mutex_exit(&osi->os_lock); 3771934e92fSmaybee return (list_head(&osi->os_dnodes) != osi->os_meta_dnode); 378ea8dc4b6Seschrock } 379ea8dc4b6Seschrock 380fa9e4066Sahrens void 381fa9e4066Sahrens dmu_objset_evict(dsl_dataset_t *ds, void *arg) 382fa9e4066Sahrens { 383fa9e4066Sahrens objset_impl_t *osi = arg; 384ea8dc4b6Seschrock objset_t os; 38599653d4eSeschrock int i; 386fa9e4066Sahrens 387fa9e4066Sahrens for (i = 0; i < TXG_SIZE; i++) { 388fa9e4066Sahrens ASSERT(list_head(&osi->os_dirty_dnodes[i]) == NULL); 389fa9e4066Sahrens ASSERT(list_head(&osi->os_free_dnodes[i]) == NULL); 390fa9e4066Sahrens } 391fa9e4066Sahrens 39299653d4eSeschrock if (ds && ds->ds_phys->ds_num_children == 0) { 39399653d4eSeschrock VERIFY(0 == dsl_prop_unregister(ds, "checksum", 39499653d4eSeschrock checksum_changed_cb, osi)); 39599653d4eSeschrock VERIFY(0 == dsl_prop_unregister(ds, "compression", 39699653d4eSeschrock compression_changed_cb, osi)); 397d0ad202dSahrens VERIFY(0 == dsl_prop_unregister(ds, "copies", 398d0ad202dSahrens copies_changed_cb, osi)); 399fa9e4066Sahrens } 400fa9e4066Sahrens 401ea8dc4b6Seschrock /* 402ea8dc4b6Seschrock * We should need only a single pass over the dnode list, since 403ea8dc4b6Seschrock * nothing can be added to the list at this point. 404ea8dc4b6Seschrock */ 405ea8dc4b6Seschrock os.os = osi; 4061934e92fSmaybee (void) dmu_objset_evict_dbufs(&os); 407ea8dc4b6Seschrock 408fa9e4066Sahrens ASSERT3P(list_head(&osi->os_dnodes), ==, osi->os_meta_dnode); 409fa9e4066Sahrens ASSERT3P(list_tail(&osi->os_dnodes), ==, osi->os_meta_dnode); 410fa9e4066Sahrens ASSERT3P(list_head(&osi->os_meta_dnode->dn_dbufs), ==, NULL); 411fa9e4066Sahrens 412fa9e4066Sahrens dnode_special_close(osi->os_meta_dnode); 413fa9e4066Sahrens zil_free(osi->os_zil); 414fa9e4066Sahrens 415c717a561Smaybee VERIFY(arc_buf_remove_ref(osi->os_phys_buf, &osi->os_phys_buf) == 1); 4165ad82045Snd mutex_destroy(&osi->os_lock); 4175ad82045Snd mutex_destroy(&osi->os_obj_lock); 418f18faf3fSek mutex_destroy(&osi->os_user_ptr_lock); 419fa9e4066Sahrens kmem_free(osi, sizeof (objset_impl_t)); 420fa9e4066Sahrens } 421fa9e4066Sahrens 422fa9e4066Sahrens /* called from dsl for meta-objset */ 423fa9e4066Sahrens objset_impl_t * 424c717a561Smaybee dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp, 425c717a561Smaybee dmu_objset_type_t type, dmu_tx_t *tx) 426fa9e4066Sahrens { 427fa9e4066Sahrens objset_impl_t *osi; 428fa9e4066Sahrens dnode_t *mdn; 429fa9e4066Sahrens 430fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 43191ebeef5Sahrens if (ds) 43291ebeef5Sahrens mutex_enter(&ds->ds_opening_lock); 433c717a561Smaybee VERIFY(0 == dmu_objset_open_impl(spa, ds, bp, &osi)); 43491ebeef5Sahrens if (ds) 43591ebeef5Sahrens mutex_exit(&ds->ds_opening_lock); 436fa9e4066Sahrens mdn = osi->os_meta_dnode; 437fa9e4066Sahrens 438fa9e4066Sahrens dnode_allocate(mdn, DMU_OT_DNODE, 1 << DNODE_BLOCK_SHIFT, 439fa9e4066Sahrens DN_MAX_INDBLKSHIFT, DMU_OT_NONE, 0, tx); 440fa9e4066Sahrens 441fa9e4066Sahrens /* 442fa9e4066Sahrens * We don't want to have to increase the meta-dnode's nlevels 443fa9e4066Sahrens * later, because then we could do it in quescing context while 444fa9e4066Sahrens * we are also accessing it in open context. 445fa9e4066Sahrens * 446fa9e4066Sahrens * This precaution is not necessary for the MOS (ds == NULL), 447fa9e4066Sahrens * because the MOS is only updated in syncing context. 448fa9e4066Sahrens * This is most fortunate: the MOS is the only objset that 449fa9e4066Sahrens * needs to be synced multiple times as spa_sync() iterates 450fa9e4066Sahrens * to convergence, so minimizing its dn_nlevels matters. 451fa9e4066Sahrens */ 452ea8dc4b6Seschrock if (ds != NULL) { 453ea8dc4b6Seschrock int levels = 1; 454ea8dc4b6Seschrock 455ea8dc4b6Seschrock /* 456ea8dc4b6Seschrock * Determine the number of levels necessary for the meta-dnode 457ea8dc4b6Seschrock * to contain DN_MAX_OBJECT dnodes. 458ea8dc4b6Seschrock */ 459ea8dc4b6Seschrock while ((uint64_t)mdn->dn_nblkptr << (mdn->dn_datablkshift + 460ea8dc4b6Seschrock (levels - 1) * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) < 461ea8dc4b6Seschrock DN_MAX_OBJECT * sizeof (dnode_phys_t)) 462ea8dc4b6Seschrock levels++; 463ea8dc4b6Seschrock 464fa9e4066Sahrens mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] = 465ea8dc4b6Seschrock mdn->dn_nlevels = levels; 466ea8dc4b6Seschrock } 467fa9e4066Sahrens 468fa9e4066Sahrens ASSERT(type != DMU_OST_NONE); 469fa9e4066Sahrens ASSERT(type != DMU_OST_ANY); 470fa9e4066Sahrens ASSERT(type < DMU_OST_NUMTYPES); 471fa9e4066Sahrens osi->os_phys->os_type = type; 472fa9e4066Sahrens 473fa9e4066Sahrens dsl_dataset_dirty(ds, tx); 474fa9e4066Sahrens 475fa9e4066Sahrens return (osi); 476fa9e4066Sahrens } 477fa9e4066Sahrens 478fa9e4066Sahrens struct oscarg { 479ecd6cf80Smarks void (*userfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); 480fa9e4066Sahrens void *userarg; 481fa9e4066Sahrens dsl_dataset_t *clone_parent; 482fa9e4066Sahrens const char *lastname; 483fa9e4066Sahrens dmu_objset_type_t type; 484fa9e4066Sahrens }; 485fa9e4066Sahrens 486ecd6cf80Smarks /*ARGSUSED*/ 487fa9e4066Sahrens static int 4881d452cf5Sahrens dmu_objset_create_check(void *arg1, void *arg2, dmu_tx_t *tx) 489fa9e4066Sahrens { 4901d452cf5Sahrens dsl_dir_t *dd = arg1; 4911d452cf5Sahrens struct oscarg *oa = arg2; 4921d452cf5Sahrens objset_t *mos = dd->dd_pool->dp_meta_objset; 493fa9e4066Sahrens int err; 4941d452cf5Sahrens uint64_t ddobj; 4951d452cf5Sahrens 4961d452cf5Sahrens err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj, 4971d452cf5Sahrens oa->lastname, sizeof (uint64_t), 1, &ddobj); 4981d452cf5Sahrens if (err != ENOENT) 4991d452cf5Sahrens return (err ? err : EEXIST); 5001d452cf5Sahrens 5011d452cf5Sahrens if (oa->clone_parent != NULL) { 5021d452cf5Sahrens /* 5031d452cf5Sahrens * You can't clone across pools. 5041d452cf5Sahrens */ 5051d452cf5Sahrens if (oa->clone_parent->ds_dir->dd_pool != dd->dd_pool) 5061d452cf5Sahrens return (EXDEV); 5071d452cf5Sahrens 5081d452cf5Sahrens /* 5091d452cf5Sahrens * You can only clone snapshots, not the head datasets. 5101d452cf5Sahrens */ 5111d452cf5Sahrens if (oa->clone_parent->ds_phys->ds_num_children == 0) 5121d452cf5Sahrens return (EINVAL); 5131d452cf5Sahrens } 514ecd6cf80Smarks 5151d452cf5Sahrens return (0); 5161d452cf5Sahrens } 5171d452cf5Sahrens 5181d452cf5Sahrens static void 519ecd6cf80Smarks dmu_objset_create_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx) 5201d452cf5Sahrens { 5211d452cf5Sahrens dsl_dir_t *dd = arg1; 5221d452cf5Sahrens struct oscarg *oa = arg2; 5231d452cf5Sahrens dsl_dataset_t *ds; 524c717a561Smaybee blkptr_t *bp; 5251d452cf5Sahrens uint64_t dsobj; 526fa9e4066Sahrens 527fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 528fa9e4066Sahrens 5291d452cf5Sahrens dsobj = dsl_dataset_create_sync(dd, oa->lastname, 530*3cb34c60Sahrens oa->clone_parent, cr, tx); 531fa9e4066Sahrens 5321d452cf5Sahrens VERIFY(0 == dsl_dataset_open_obj(dd->dd_pool, dsobj, NULL, 533ea8dc4b6Seschrock DS_MODE_STANDARD | DS_MODE_READONLY, FTAG, &ds)); 534c717a561Smaybee bp = dsl_dataset_get_blkptr(ds); 535c717a561Smaybee if (BP_IS_HOLE(bp)) { 536fa9e4066Sahrens objset_impl_t *osi; 537fa9e4066Sahrens 538fa9e4066Sahrens /* This is an empty dmu_objset; not a clone. */ 539fa9e4066Sahrens osi = dmu_objset_create_impl(dsl_dataset_get_spa(ds), 540c717a561Smaybee ds, bp, oa->type, tx); 541fa9e4066Sahrens 542fa9e4066Sahrens if (oa->userfunc) 543ecd6cf80Smarks oa->userfunc(&osi->os, oa->userarg, cr, tx); 544fa9e4066Sahrens } 545ecd6cf80Smarks 546ecd6cf80Smarks spa_history_internal_log(LOG_DS_CREATE, dd->dd_pool->dp_spa, 547ecd6cf80Smarks tx, cr, "dataset = %llu", dsobj); 548ecd6cf80Smarks 549fa9e4066Sahrens dsl_dataset_close(ds, DS_MODE_STANDARD | DS_MODE_READONLY, FTAG); 550fa9e4066Sahrens } 551fa9e4066Sahrens 552fa9e4066Sahrens int 553fa9e4066Sahrens dmu_objset_create(const char *name, dmu_objset_type_t type, 554fa9e4066Sahrens objset_t *clone_parent, 555ecd6cf80Smarks void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg) 556fa9e4066Sahrens { 5571d452cf5Sahrens dsl_dir_t *pdd; 558fa9e4066Sahrens const char *tail; 559fa9e4066Sahrens int err = 0; 5601d452cf5Sahrens struct oscarg oa = { 0 }; 561fa9e4066Sahrens 5621d452cf5Sahrens ASSERT(strchr(name, '@') == NULL); 5631d452cf5Sahrens err = dsl_dir_open(name, FTAG, &pdd, &tail); 564ea8dc4b6Seschrock if (err) 565ea8dc4b6Seschrock return (err); 566fa9e4066Sahrens if (tail == NULL) { 5671d452cf5Sahrens dsl_dir_close(pdd, FTAG); 568fa9e4066Sahrens return (EEXIST); 569fa9e4066Sahrens } 570fa9e4066Sahrens 571fa9e4066Sahrens dprintf("name=%s\n", name); 572fa9e4066Sahrens 5731d452cf5Sahrens oa.userfunc = func; 5741d452cf5Sahrens oa.userarg = arg; 5751d452cf5Sahrens oa.lastname = tail; 5761d452cf5Sahrens oa.type = type; 577ecd6cf80Smarks 5781d452cf5Sahrens if (clone_parent != NULL) { 579fa9e4066Sahrens /* 5801d452cf5Sahrens * You can't clone to a different type. 581fa9e4066Sahrens */ 5821d452cf5Sahrens if (clone_parent->os->os_phys->os_type != type) { 5831d452cf5Sahrens dsl_dir_close(pdd, FTAG); 5841d452cf5Sahrens return (EINVAL); 585fa9e4066Sahrens } 5861d452cf5Sahrens oa.clone_parent = clone_parent->os->os_dsl_dataset; 587fa9e4066Sahrens } 5881d452cf5Sahrens err = dsl_sync_task_do(pdd->dd_pool, dmu_objset_create_check, 5891d452cf5Sahrens dmu_objset_create_sync, pdd, &oa, 5); 5901d452cf5Sahrens dsl_dir_close(pdd, FTAG); 591fa9e4066Sahrens return (err); 592fa9e4066Sahrens } 593fa9e4066Sahrens 594fa9e4066Sahrens int 595fa9e4066Sahrens dmu_objset_destroy(const char *name) 596fa9e4066Sahrens { 597fa9e4066Sahrens objset_t *os; 598fa9e4066Sahrens int error; 599fa9e4066Sahrens 600fa9e4066Sahrens /* 601fa9e4066Sahrens * If it looks like we'll be able to destroy it, and there's 602fa9e4066Sahrens * an unplayed replay log sitting around, destroy the log. 603fa9e4066Sahrens * It would be nicer to do this in dsl_dataset_destroy_sync(), 604fa9e4066Sahrens * but the replay log objset is modified in open context. 605fa9e4066Sahrens */ 606*3cb34c60Sahrens error = dmu_objset_open(name, DMU_OST_ANY, 607*3cb34c60Sahrens DS_MODE_EXCLUSIVE|DS_MODE_READONLY, &os); 608fa9e4066Sahrens if (error == 0) { 609*3cb34c60Sahrens dsl_dataset_t *ds = os->os->os_dsl_dataset; 610d80c45e0Sbonwick zil_destroy(dmu_objset_zil(os), B_FALSE); 611*3cb34c60Sahrens 612*3cb34c60Sahrens /* 613*3cb34c60Sahrens * dsl_dataset_destroy() closes the ds. 614*3cb34c60Sahrens * os is just used as the tag after it's freed. 615*3cb34c60Sahrens */ 616*3cb34c60Sahrens kmem_free(os, sizeof (objset_t)); 617*3cb34c60Sahrens error = dsl_dataset_destroy(ds, os); 618fa9e4066Sahrens } 619fa9e4066Sahrens 620*3cb34c60Sahrens return (error); 621fa9e4066Sahrens } 622fa9e4066Sahrens 623fa9e4066Sahrens int 624fa9e4066Sahrens dmu_objset_rollback(const char *name) 625fa9e4066Sahrens { 626fa9e4066Sahrens int err; 627fa9e4066Sahrens objset_t *os; 628*3cb34c60Sahrens dsl_dataset_t *ds; 629fa9e4066Sahrens 6301d452cf5Sahrens err = dmu_objset_open(name, DMU_OST_ANY, 6311d452cf5Sahrens DS_MODE_EXCLUSIVE | DS_MODE_INCONSISTENT, &os); 6323a8a1de4Sperrin if (err) 6333a8a1de4Sperrin return (err); 6343a8a1de4Sperrin 635*3cb34c60Sahrens ds = os->os->os_dsl_dataset; 636*3cb34c60Sahrens err = dsl_dataset_rollback(ds, os->os->os_phys->os_type); 6373a8a1de4Sperrin 638*3cb34c60Sahrens /* 639*3cb34c60Sahrens * NB: we close the objset manually because the rollback 640*3cb34c60Sahrens * actually implicitly called dmu_objset_evict(), thus freeing 641*3cb34c60Sahrens * the objset_impl_t. 642*3cb34c60Sahrens */ 643*3cb34c60Sahrens dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, os); 644*3cb34c60Sahrens kmem_free(os, sizeof (objset_t)); 645fa9e4066Sahrens return (err); 646fa9e4066Sahrens } 647fa9e4066Sahrens 6481d452cf5Sahrens struct snaparg { 6491d452cf5Sahrens dsl_sync_task_group_t *dstg; 6501d452cf5Sahrens char *snapname; 6511d452cf5Sahrens char failed[MAXPATHLEN]; 652ecd6cf80Smarks boolean_t checkperms; 653*3cb34c60Sahrens list_t objsets; 654*3cb34c60Sahrens }; 655*3cb34c60Sahrens 656*3cb34c60Sahrens struct osnode { 657*3cb34c60Sahrens list_node_t node; 658*3cb34c60Sahrens objset_t *os; 6591d452cf5Sahrens }; 6601d452cf5Sahrens 6611d452cf5Sahrens static int 6621d452cf5Sahrens dmu_objset_snapshot_one(char *name, void *arg) 6631d452cf5Sahrens { 6641d452cf5Sahrens struct snaparg *sn = arg; 6651d452cf5Sahrens objset_t *os; 666f2e10be3Srm dmu_objset_stats_t stat; 6671d452cf5Sahrens int err; 6681d452cf5Sahrens 6691d452cf5Sahrens (void) strcpy(sn->failed, name); 6701d452cf5Sahrens 671ecd6cf80Smarks /* 672ecd6cf80Smarks * Check permissions only when requested. This only applies when 673ecd6cf80Smarks * doing a recursive snapshot. The permission checks for the starting 674ecd6cf80Smarks * dataset have already been performed in zfs_secpolicy_snapshot() 675ecd6cf80Smarks */ 676ecd6cf80Smarks if (sn->checkperms == B_TRUE && 677ecd6cf80Smarks (err = zfs_secpolicy_snapshot_perms(name, CRED()))) 678ecd6cf80Smarks return (err); 679ecd6cf80Smarks 6801d452cf5Sahrens err = dmu_objset_open(name, DMU_OST_ANY, DS_MODE_STANDARD, &os); 6811d452cf5Sahrens if (err != 0) 6821d452cf5Sahrens return (err); 6831d452cf5Sahrens 684f2e10be3Srm /* 685f2e10be3Srm * If the objset is in an inconsistent state, return busy. 686f2e10be3Srm */ 687f2e10be3Srm dmu_objset_fast_stat(os, &stat); 688f2e10be3Srm if (stat.dds_inconsistent) { 689f2e10be3Srm dmu_objset_close(os); 690f2e10be3Srm return (EBUSY); 691f2e10be3Srm } 692f2e10be3Srm 6931d452cf5Sahrens /* 6941d452cf5Sahrens * NB: we need to wait for all in-flight changes to get to disk, 6951d452cf5Sahrens * so that we snapshot those changes. zil_suspend does this as 6961d452cf5Sahrens * a side effect. 6971d452cf5Sahrens */ 6981d452cf5Sahrens err = zil_suspend(dmu_objset_zil(os)); 6991d452cf5Sahrens if (err == 0) { 700*3cb34c60Sahrens struct osnode *osn; 7011d452cf5Sahrens dsl_sync_task_create(sn->dstg, dsl_dataset_snapshot_check, 702*3cb34c60Sahrens dsl_dataset_snapshot_sync, os->os->os_dsl_dataset, 703*3cb34c60Sahrens sn->snapname, 3); 704*3cb34c60Sahrens osn = kmem_alloc(sizeof (struct osnode), KM_SLEEP); 705*3cb34c60Sahrens osn->os = os; 706*3cb34c60Sahrens list_insert_tail(&sn->objsets, osn); 707f2e10be3Srm } else { 708f2e10be3Srm dmu_objset_close(os); 7091d452cf5Sahrens } 710f2e10be3Srm 7111d452cf5Sahrens return (err); 7121d452cf5Sahrens } 7131d452cf5Sahrens 7141d452cf5Sahrens int 7151d452cf5Sahrens dmu_objset_snapshot(char *fsname, char *snapname, boolean_t recursive) 7161d452cf5Sahrens { 7171d452cf5Sahrens dsl_sync_task_t *dst; 718*3cb34c60Sahrens struct osnode *osn; 7191d452cf5Sahrens struct snaparg sn = { 0 }; 7201d452cf5Sahrens spa_t *spa; 7211d452cf5Sahrens int err; 7221d452cf5Sahrens 7231d452cf5Sahrens (void) strcpy(sn.failed, fsname); 7241d452cf5Sahrens 72540feaa91Sahrens err = spa_open(fsname, &spa, FTAG); 7261d452cf5Sahrens if (err) 7271d452cf5Sahrens return (err); 7281d452cf5Sahrens 7291d452cf5Sahrens sn.dstg = dsl_sync_task_group_create(spa_get_dsl(spa)); 7301d452cf5Sahrens sn.snapname = snapname; 731*3cb34c60Sahrens list_create(&sn.objsets, sizeof (struct osnode), 732*3cb34c60Sahrens offsetof(struct osnode, node)); 7331d452cf5Sahrens 7340b69c2f0Sahrens if (recursive) { 735ecd6cf80Smarks sn.checkperms = B_TRUE; 7360b69c2f0Sahrens err = dmu_objset_find(fsname, 7370b69c2f0Sahrens dmu_objset_snapshot_one, &sn, DS_FIND_CHILDREN); 7380b69c2f0Sahrens } else { 739ecd6cf80Smarks sn.checkperms = B_FALSE; 7401d452cf5Sahrens err = dmu_objset_snapshot_one(fsname, &sn); 7410b69c2f0Sahrens } 7421d452cf5Sahrens 7431d452cf5Sahrens if (err) 7441d452cf5Sahrens goto out; 7451d452cf5Sahrens 7461d452cf5Sahrens err = dsl_sync_task_group_wait(sn.dstg); 7471d452cf5Sahrens 7481d452cf5Sahrens for (dst = list_head(&sn.dstg->dstg_tasks); dst; 7491d452cf5Sahrens dst = list_next(&sn.dstg->dstg_tasks, dst)) { 750*3cb34c60Sahrens dsl_dataset_t *ds = dst->dst_arg1; 7511d452cf5Sahrens if (dst->dst_err) 752*3cb34c60Sahrens dsl_dataset_name(ds, sn.failed); 753*3cb34c60Sahrens } 754*3cb34c60Sahrens 755*3cb34c60Sahrens while (osn = list_head(&sn.objsets)) { 756*3cb34c60Sahrens list_remove(&sn.objsets, osn); 757*3cb34c60Sahrens zil_resume(dmu_objset_zil(osn->os)); 758*3cb34c60Sahrens dmu_objset_close(osn->os); 759*3cb34c60Sahrens kmem_free(osn, sizeof (struct osnode)); 7601d452cf5Sahrens } 761*3cb34c60Sahrens list_destroy(&sn.objsets); 7621d452cf5Sahrens out: 7631d452cf5Sahrens if (err) 7641d452cf5Sahrens (void) strcpy(fsname, sn.failed); 7651d452cf5Sahrens dsl_sync_task_group_destroy(sn.dstg); 7661d452cf5Sahrens spa_close(spa, FTAG); 7671d452cf5Sahrens return (err); 7681d452cf5Sahrens } 7691d452cf5Sahrens 770fa9e4066Sahrens static void 771c717a561Smaybee dmu_objset_sync_dnodes(list_t *list, dmu_tx_t *tx) 772fa9e4066Sahrens { 773c717a561Smaybee dnode_t *dn; 774faafa6e3Sahrens 775c717a561Smaybee while (dn = list_head(list)) { 776c717a561Smaybee ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT); 777c717a561Smaybee ASSERT(dn->dn_dbuf->db_data_pending); 778c717a561Smaybee /* 779c717a561Smaybee * Initialize dn_zio outside dnode_sync() 780c717a561Smaybee * to accomodate meta-dnode 781c717a561Smaybee */ 782c717a561Smaybee dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio; 783c717a561Smaybee ASSERT(dn->dn_zio); 784faafa6e3Sahrens 785c717a561Smaybee ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS); 786c717a561Smaybee list_remove(list, dn); 787c717a561Smaybee dnode_sync(dn, tx); 788fa9e4066Sahrens } 789fa9e4066Sahrens } 790fa9e4066Sahrens 791fa9e4066Sahrens /* ARGSUSED */ 792fa9e4066Sahrens static void 793c717a561Smaybee ready(zio_t *zio, arc_buf_t *abuf, void *arg) 794fa9e4066Sahrens { 795fa9e4066Sahrens objset_impl_t *os = arg; 796c717a561Smaybee blkptr_t *bp = os->os_rootbp; 797c717a561Smaybee dnode_phys_t *dnp = &os->os_phys->os_meta_dnode; 798fa9e4066Sahrens int i; 799fa9e4066Sahrens 8000a4e9518Sgw ASSERT(bp == zio->io_bp); 8010a4e9518Sgw 802fa9e4066Sahrens /* 803fa9e4066Sahrens * Update rootbp fill count. 804fa9e4066Sahrens */ 805c717a561Smaybee bp->blk_fill = 1; /* count the meta-dnode */ 806fa9e4066Sahrens for (i = 0; i < dnp->dn_nblkptr; i++) 807c717a561Smaybee bp->blk_fill += dnp->dn_blkptr[i].blk_fill; 8080a4e9518Sgw 8090a4e9518Sgw BP_SET_TYPE(bp, DMU_OT_OBJSET); 8100a4e9518Sgw BP_SET_LEVEL(bp, 0); 8110a4e9518Sgw 8120a4e9518Sgw /* We must do this after we've set the bp's type and level */ 8130a4e9518Sgw if (!DVA_EQUAL(BP_IDENTITY(bp), 8140a4e9518Sgw BP_IDENTITY(&zio->io_bp_orig))) { 8150a4e9518Sgw if (zio->io_bp_orig.blk_birth == os->os_synctx->tx_txg) 8160a4e9518Sgw dsl_dataset_block_kill(os->os_dsl_dataset, 8170a4e9518Sgw &zio->io_bp_orig, NULL, os->os_synctx); 8180a4e9518Sgw dsl_dataset_block_born(os->os_dsl_dataset, bp, os->os_synctx); 8190a4e9518Sgw } 820c717a561Smaybee } 821c717a561Smaybee 822c717a561Smaybee /* ARGSUSED */ 823c717a561Smaybee static void 824c717a561Smaybee killer(zio_t *zio, arc_buf_t *abuf, void *arg) 825c717a561Smaybee { 826c717a561Smaybee objset_impl_t *os = arg; 827c717a561Smaybee 828c717a561Smaybee ASSERT3U(zio->io_error, ==, 0); 829c717a561Smaybee arc_release(os->os_phys_buf, &os->os_phys_buf); 830fa9e4066Sahrens } 831fa9e4066Sahrens 832fa9e4066Sahrens /* called from dsl */ 833fa9e4066Sahrens void 834c717a561Smaybee dmu_objset_sync(objset_impl_t *os, zio_t *pio, dmu_tx_t *tx) 835fa9e4066Sahrens { 836fa9e4066Sahrens int txgoff; 837ea8dc4b6Seschrock zbookmark_t zb; 838c717a561Smaybee zio_t *zio; 839c717a561Smaybee list_t *list; 840c717a561Smaybee dbuf_dirty_record_t *dr; 841c717a561Smaybee 842c717a561Smaybee dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg); 843fa9e4066Sahrens 844fa9e4066Sahrens ASSERT(dmu_tx_is_syncing(tx)); 845fa9e4066Sahrens /* XXX the write_done callback should really give us the tx... */ 846fa9e4066Sahrens os->os_synctx = tx; 847fa9e4066Sahrens 84887bd5c1eSahrens if (os->os_dsl_dataset == NULL) { 84987bd5c1eSahrens /* 85087bd5c1eSahrens * This is the MOS. If we have upgraded, 85187bd5c1eSahrens * spa_max_replication() could change, so reset 85287bd5c1eSahrens * os_copies here. 85387bd5c1eSahrens */ 85487bd5c1eSahrens os->os_copies = spa_max_replication(os->os_spa); 85587bd5c1eSahrens } 85687bd5c1eSahrens 857fa9e4066Sahrens /* 858c717a561Smaybee * Create the root block IO 859fa9e4066Sahrens */ 860ea8dc4b6Seschrock zb.zb_objset = os->os_dsl_dataset ? os->os_dsl_dataset->ds_object : 0; 861ea8dc4b6Seschrock zb.zb_object = 0; 862ea8dc4b6Seschrock zb.zb_level = -1; 863ea8dc4b6Seschrock zb.zb_blkid = 0; 86491ebeef5Sahrens if (BP_IS_OLDER(os->os_rootbp, tx->tx_txg)) { 865c717a561Smaybee dsl_dataset_block_kill(os->os_dsl_dataset, 866c717a561Smaybee os->os_rootbp, pio, tx); 86791ebeef5Sahrens } 868c717a561Smaybee zio = arc_write(pio, os->os_spa, os->os_md_checksum, 86944cd46caSbillm os->os_md_compress, 870d0ad202dSahrens dmu_get_replication_level(os, &zb, DMU_OT_OBJSET), 871c717a561Smaybee tx->tx_txg, os->os_rootbp, os->os_phys_buf, ready, killer, os, 872fdb2e906Sek ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED | ZIO_FLAG_METADATA, 873fdb2e906Sek &zb); 874c717a561Smaybee 875c717a561Smaybee /* 876c717a561Smaybee * Sync meta-dnode - the parent IO for the sync is the root block 877c717a561Smaybee */ 878c717a561Smaybee os->os_meta_dnode->dn_zio = zio; 879c717a561Smaybee dnode_sync(os->os_meta_dnode, tx); 880c717a561Smaybee 881c717a561Smaybee txgoff = tx->tx_txg & TXG_MASK; 882fa9e4066Sahrens 883c717a561Smaybee dmu_objset_sync_dnodes(&os->os_free_dnodes[txgoff], tx); 884c717a561Smaybee dmu_objset_sync_dnodes(&os->os_dirty_dnodes[txgoff], tx); 885fa9e4066Sahrens 886c717a561Smaybee list = &os->os_meta_dnode->dn_dirty_records[txgoff]; 887c717a561Smaybee while (dr = list_head(list)) { 888c717a561Smaybee ASSERT(dr->dr_dbuf->db_level == 0); 889c717a561Smaybee list_remove(list, dr); 890c717a561Smaybee if (dr->dr_zio) 891c717a561Smaybee zio_nowait(dr->dr_zio); 892c717a561Smaybee } 893c717a561Smaybee /* 894c717a561Smaybee * Free intent log blocks up to this tx. 895c717a561Smaybee */ 896c717a561Smaybee zil_sync(os->os_zil, tx); 897c717a561Smaybee zio_nowait(zio); 898fa9e4066Sahrens } 899fa9e4066Sahrens 900fa9e4066Sahrens void 901a2eea2e1Sahrens dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 902a2eea2e1Sahrens uint64_t *usedobjsp, uint64_t *availobjsp) 903fa9e4066Sahrens { 904a2eea2e1Sahrens dsl_dataset_space(os->os->os_dsl_dataset, refdbytesp, availbytesp, 905a2eea2e1Sahrens usedobjsp, availobjsp); 906a2eea2e1Sahrens } 907a2eea2e1Sahrens 908a2eea2e1Sahrens uint64_t 909a2eea2e1Sahrens dmu_objset_fsid_guid(objset_t *os) 910a2eea2e1Sahrens { 911a2eea2e1Sahrens return (dsl_dataset_fsid_guid(os->os->os_dsl_dataset)); 912a2eea2e1Sahrens } 913a2eea2e1Sahrens 914a2eea2e1Sahrens void 915a2eea2e1Sahrens dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat) 916a2eea2e1Sahrens { 917a2eea2e1Sahrens stat->dds_type = os->os->os_phys->os_type; 918a2eea2e1Sahrens if (os->os->os_dsl_dataset) 919a2eea2e1Sahrens dsl_dataset_fast_stat(os->os->os_dsl_dataset, stat); 920a2eea2e1Sahrens } 921a2eea2e1Sahrens 922a2eea2e1Sahrens void 923a2eea2e1Sahrens dmu_objset_stats(objset_t *os, nvlist_t *nv) 924a2eea2e1Sahrens { 925a2eea2e1Sahrens ASSERT(os->os->os_dsl_dataset || 926a2eea2e1Sahrens os->os->os_phys->os_type == DMU_OST_META); 927a2eea2e1Sahrens 928a2eea2e1Sahrens if (os->os->os_dsl_dataset != NULL) 929a2eea2e1Sahrens dsl_dataset_stats(os->os->os_dsl_dataset, nv); 930a2eea2e1Sahrens 931a2eea2e1Sahrens dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE, 932a2eea2e1Sahrens os->os->os_phys->os_type); 933fa9e4066Sahrens } 934fa9e4066Sahrens 935fa9e4066Sahrens int 936fa9e4066Sahrens dmu_objset_is_snapshot(objset_t *os) 937fa9e4066Sahrens { 938fa9e4066Sahrens if (os->os->os_dsl_dataset != NULL) 939fa9e4066Sahrens return (dsl_dataset_is_snapshot(os->os->os_dsl_dataset)); 940fa9e4066Sahrens else 941fa9e4066Sahrens return (B_FALSE); 942fa9e4066Sahrens } 943fa9e4066Sahrens 944fa9e4066Sahrens int 945fa9e4066Sahrens dmu_snapshot_list_next(objset_t *os, int namelen, char *name, 94687e5029aSahrens uint64_t *idp, uint64_t *offp) 947fa9e4066Sahrens { 948fa9e4066Sahrens dsl_dataset_t *ds = os->os->os_dsl_dataset; 949fa9e4066Sahrens zap_cursor_t cursor; 950fa9e4066Sahrens zap_attribute_t attr; 951fa9e4066Sahrens 952fa9e4066Sahrens if (ds->ds_phys->ds_snapnames_zapobj == 0) 953fa9e4066Sahrens return (ENOENT); 954fa9e4066Sahrens 955fa9e4066Sahrens zap_cursor_init_serialized(&cursor, 956fa9e4066Sahrens ds->ds_dir->dd_pool->dp_meta_objset, 957fa9e4066Sahrens ds->ds_phys->ds_snapnames_zapobj, *offp); 958fa9e4066Sahrens 95987e5029aSahrens if (zap_cursor_retrieve(&cursor, &attr) != 0) { 96087e5029aSahrens zap_cursor_fini(&cursor); 96187e5029aSahrens return (ENOENT); 96287e5029aSahrens } 96387e5029aSahrens 96487e5029aSahrens if (strlen(attr.za_name) + 1 > namelen) { 96587e5029aSahrens zap_cursor_fini(&cursor); 96687e5029aSahrens return (ENAMETOOLONG); 96787e5029aSahrens } 96887e5029aSahrens 96987e5029aSahrens (void) strcpy(name, attr.za_name); 97087e5029aSahrens if (idp) 97187e5029aSahrens *idp = attr.za_first_integer; 97287e5029aSahrens zap_cursor_advance(&cursor); 97387e5029aSahrens *offp = zap_cursor_serialize(&cursor); 97487e5029aSahrens zap_cursor_fini(&cursor); 97587e5029aSahrens 97687e5029aSahrens return (0); 97787e5029aSahrens } 97887e5029aSahrens 97987e5029aSahrens int 98087e5029aSahrens dmu_dir_list_next(objset_t *os, int namelen, char *name, 98187e5029aSahrens uint64_t *idp, uint64_t *offp) 98287e5029aSahrens { 98387e5029aSahrens dsl_dir_t *dd = os->os->os_dsl_dataset->ds_dir; 98487e5029aSahrens zap_cursor_t cursor; 98587e5029aSahrens zap_attribute_t attr; 98687e5029aSahrens 98787e5029aSahrens /* there is no next dir on a snapshot! */ 98887e5029aSahrens if (os->os->os_dsl_dataset->ds_object != 98987e5029aSahrens dd->dd_phys->dd_head_dataset_obj) 990fa9e4066Sahrens return (ENOENT); 991fa9e4066Sahrens 99287e5029aSahrens zap_cursor_init_serialized(&cursor, 99387e5029aSahrens dd->dd_pool->dp_meta_objset, 99487e5029aSahrens dd->dd_phys->dd_child_dir_zapobj, *offp); 99587e5029aSahrens 99687e5029aSahrens if (zap_cursor_retrieve(&cursor, &attr) != 0) { 99787e5029aSahrens zap_cursor_fini(&cursor); 99887e5029aSahrens return (ENOENT); 99987e5029aSahrens } 100087e5029aSahrens 100187e5029aSahrens if (strlen(attr.za_name) + 1 > namelen) { 100287e5029aSahrens zap_cursor_fini(&cursor); 1003fa9e4066Sahrens return (ENAMETOOLONG); 100487e5029aSahrens } 1005fa9e4066Sahrens 1006fa9e4066Sahrens (void) strcpy(name, attr.za_name); 100787e5029aSahrens if (idp) 100887e5029aSahrens *idp = attr.za_first_integer; 1009fa9e4066Sahrens zap_cursor_advance(&cursor); 1010fa9e4066Sahrens *offp = zap_cursor_serialize(&cursor); 101187e5029aSahrens zap_cursor_fini(&cursor); 1012fa9e4066Sahrens 1013fa9e4066Sahrens return (0); 1014fa9e4066Sahrens } 1015fa9e4066Sahrens 1016fa9e4066Sahrens /* 1017fa9e4066Sahrens * Find all objsets under name, and for each, call 'func(child_name, arg)'. 1018fa9e4066Sahrens */ 10191d452cf5Sahrens int 10201d452cf5Sahrens dmu_objset_find(char *name, int func(char *, void *), void *arg, int flags) 1021fa9e4066Sahrens { 1022fa9e4066Sahrens dsl_dir_t *dd; 1023fa9e4066Sahrens objset_t *os; 1024fa9e4066Sahrens uint64_t snapobj; 1025fa9e4066Sahrens zap_cursor_t zc; 1026b7661cccSmmusante zap_attribute_t *attr; 1027fa9e4066Sahrens char *child; 1028ea8dc4b6Seschrock int do_self, err; 1029fa9e4066Sahrens 1030ea8dc4b6Seschrock err = dsl_dir_open(name, FTAG, &dd, NULL); 1031ea8dc4b6Seschrock if (err) 10321d452cf5Sahrens return (err); 1033fa9e4066Sahrens 10341d452cf5Sahrens /* NB: the $MOS dir doesn't have a head dataset */ 1035fa9e4066Sahrens do_self = (dd->dd_phys->dd_head_dataset_obj != 0); 1036b7661cccSmmusante attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); 1037fa9e4066Sahrens 1038fa9e4066Sahrens /* 1039fa9e4066Sahrens * Iterate over all children. 1040fa9e4066Sahrens */ 10410b69c2f0Sahrens if (flags & DS_FIND_CHILDREN) { 10420b69c2f0Sahrens for (zap_cursor_init(&zc, dd->dd_pool->dp_meta_objset, 10430b69c2f0Sahrens dd->dd_phys->dd_child_dir_zapobj); 1044b7661cccSmmusante zap_cursor_retrieve(&zc, attr) == 0; 10450b69c2f0Sahrens (void) zap_cursor_advance(&zc)) { 1046b7661cccSmmusante ASSERT(attr->za_integer_length == sizeof (uint64_t)); 1047b7661cccSmmusante ASSERT(attr->za_num_integers == 1); 1048fa9e4066Sahrens 10490b69c2f0Sahrens /* 10500b69c2f0Sahrens * No separating '/' because parent's name ends in /. 10510b69c2f0Sahrens */ 10520b69c2f0Sahrens child = kmem_alloc(MAXPATHLEN, KM_SLEEP); 10530b69c2f0Sahrens /* XXX could probably just use name here */ 10540b69c2f0Sahrens dsl_dir_name(dd, child); 10550b69c2f0Sahrens (void) strcat(child, "/"); 1056b7661cccSmmusante (void) strcat(child, attr->za_name); 10570b69c2f0Sahrens err = dmu_objset_find(child, func, arg, flags); 10580b69c2f0Sahrens kmem_free(child, MAXPATHLEN); 10590b69c2f0Sahrens if (err) 10600b69c2f0Sahrens break; 10610b69c2f0Sahrens } 10620b69c2f0Sahrens zap_cursor_fini(&zc); 10631d452cf5Sahrens 10640b69c2f0Sahrens if (err) { 10650b69c2f0Sahrens dsl_dir_close(dd, FTAG); 1066b7661cccSmmusante kmem_free(attr, sizeof (zap_attribute_t)); 10670b69c2f0Sahrens return (err); 10680b69c2f0Sahrens } 1069fa9e4066Sahrens } 1070fa9e4066Sahrens 1071fa9e4066Sahrens /* 1072fa9e4066Sahrens * Iterate over all snapshots. 1073fa9e4066Sahrens */ 1074fa9e4066Sahrens if ((flags & DS_FIND_SNAPSHOTS) && 1075fa9e4066Sahrens dmu_objset_open(name, DMU_OST_ANY, 1076fa9e4066Sahrens DS_MODE_STANDARD | DS_MODE_READONLY, &os) == 0) { 1077fa9e4066Sahrens 1078fa9e4066Sahrens snapobj = os->os->os_dsl_dataset->ds_phys->ds_snapnames_zapobj; 1079fa9e4066Sahrens dmu_objset_close(os); 1080fa9e4066Sahrens 1081fa9e4066Sahrens for (zap_cursor_init(&zc, dd->dd_pool->dp_meta_objset, snapobj); 1082b7661cccSmmusante zap_cursor_retrieve(&zc, attr) == 0; 1083fa9e4066Sahrens (void) zap_cursor_advance(&zc)) { 1084b7661cccSmmusante ASSERT(attr->za_integer_length == sizeof (uint64_t)); 1085b7661cccSmmusante ASSERT(attr->za_num_integers == 1); 1086fa9e4066Sahrens 1087fa9e4066Sahrens child = kmem_alloc(MAXPATHLEN, KM_SLEEP); 1088fa9e4066Sahrens /* XXX could probably just use name here */ 1089fa9e4066Sahrens dsl_dir_name(dd, child); 1090fa9e4066Sahrens (void) strcat(child, "@"); 1091b7661cccSmmusante (void) strcat(child, attr->za_name); 10921d452cf5Sahrens err = func(child, arg); 1093fa9e4066Sahrens kmem_free(child, MAXPATHLEN); 10941d452cf5Sahrens if (err) 10951d452cf5Sahrens break; 1096fa9e4066Sahrens } 109787e5029aSahrens zap_cursor_fini(&zc); 1098fa9e4066Sahrens } 1099fa9e4066Sahrens 1100fa9e4066Sahrens dsl_dir_close(dd, FTAG); 1101b7661cccSmmusante kmem_free(attr, sizeof (zap_attribute_t)); 1102fa9e4066Sahrens 11031d452cf5Sahrens if (err) 11041d452cf5Sahrens return (err); 11051d452cf5Sahrens 1106fa9e4066Sahrens /* 1107fa9e4066Sahrens * Apply to self if appropriate. 1108fa9e4066Sahrens */ 1109fa9e4066Sahrens if (do_self) 11101d452cf5Sahrens err = func(name, arg); 11111d452cf5Sahrens return (err); 1112fa9e4066Sahrens } 1113f18faf3fSek 1114f18faf3fSek void 1115f18faf3fSek dmu_objset_set_user(objset_t *os, void *user_ptr) 1116f18faf3fSek { 1117f18faf3fSek ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock)); 1118f18faf3fSek os->os->os_user_ptr = user_ptr; 1119f18faf3fSek } 1120f18faf3fSek 1121f18faf3fSek void * 1122f18faf3fSek dmu_objset_get_user(objset_t *os) 1123f18faf3fSek { 1124f18faf3fSek ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock)); 1125f18faf3fSek return (os->os->os_user_ptr); 1126f18faf3fSek } 1127