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 /* 2255434c77Sek * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 2675c76197Speteh /* Portions Copyright 2007 Jeremy Teo */ 2775c76197Speteh 28fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 29fa9e4066Sahrens 3055434c77Sek #ifdef _KERNEL 31fa9e4066Sahrens #include <sys/types.h> 32fa9e4066Sahrens #include <sys/param.h> 33fa9e4066Sahrens #include <sys/time.h> 34fa9e4066Sahrens #include <sys/systm.h> 35fa9e4066Sahrens #include <sys/sysmacros.h> 36fa9e4066Sahrens #include <sys/resource.h> 37fa9e4066Sahrens #include <sys/mntent.h> 3872fc53bcSmarks #include <sys/mkdev.h> 39fa9e4066Sahrens #include <sys/vfs.h> 40aa59c4cbSrsb #include <sys/vfs_opreg.h> 41fa9e4066Sahrens #include <sys/vnode.h> 42fa9e4066Sahrens #include <sys/file.h> 43fa9e4066Sahrens #include <sys/kmem.h> 44fa9e4066Sahrens #include <sys/errno.h> 45fa9e4066Sahrens #include <sys/unistd.h> 46fa9e4066Sahrens #include <sys/mode.h> 47fa9e4066Sahrens #include <sys/atomic.h> 48fa9e4066Sahrens #include <vm/pvn.h> 49fa9e4066Sahrens #include "fs/fs_subr.h" 50fa9e4066Sahrens #include <sys/zfs_dir.h> 51fa9e4066Sahrens #include <sys/zfs_acl.h> 52fa9e4066Sahrens #include <sys/zfs_ioctl.h> 53104e2ed7Sperrin #include <sys/zfs_rlock.h> 54da6c28aaSamw #include <sys/zfs_fuid.h> 55da6c28aaSamw #include <sys/zfs_i18n.h> 56fa9e4066Sahrens #include <sys/fs/zfs.h> 57da6c28aaSamw #include <sys/kidmap.h> 5855434c77Sek #endif /* _KERNEL */ 5955434c77Sek 6055434c77Sek #include <sys/dmu.h> 6155434c77Sek #include <sys/refcount.h> 6255434c77Sek #include <sys/stat.h> 6355434c77Sek #include <sys/zap.h> 6455434c77Sek #include <sys/zfs_znode.h> 65fa9e4066Sahrens 6655434c77Sek /* 6755434c77Sek * Functions needed for userland (ie: libzpool) are not put under 6855434c77Sek * #ifdef_KERNEL; the rest of the functions have dependencies 6955434c77Sek * (such as VFS logic) that will not compile easily in userland. 7055434c77Sek */ 7155434c77Sek #ifdef _KERNEL 72fa9e4066Sahrens struct kmem_cache *znode_cache = NULL; 73fa9e4066Sahrens 74fa9e4066Sahrens /*ARGSUSED*/ 75fa9e4066Sahrens static void 76fa9e4066Sahrens znode_pageout_func(dmu_buf_t *dbuf, void *user_ptr) 77fa9e4066Sahrens { 78fa9e4066Sahrens znode_t *zp = user_ptr; 79fa9e4066Sahrens vnode_t *vp = ZTOV(zp); 80fa9e4066Sahrens 81ea8dc4b6Seschrock mutex_enter(&zp->z_lock); 82*4ccbb6e7Sahrens zp->z_dbuf = NULL; 83fa9e4066Sahrens if (vp->v_count == 0) { 84ea8dc4b6Seschrock mutex_exit(&zp->z_lock); 85fa9e4066Sahrens vn_invalid(vp); 86fa9e4066Sahrens zfs_znode_free(zp); 87ea8dc4b6Seschrock } else { 88ea8dc4b6Seschrock mutex_exit(&zp->z_lock); 89fa9e4066Sahrens } 90fa9e4066Sahrens } 91fa9e4066Sahrens 92fa9e4066Sahrens /*ARGSUSED*/ 93fa9e4066Sahrens static int 94fa9e4066Sahrens zfs_znode_cache_constructor(void *buf, void *cdrarg, int kmflags) 95fa9e4066Sahrens { 96fa9e4066Sahrens znode_t *zp = buf; 97fa9e4066Sahrens 98fa9e4066Sahrens zp->z_vnode = vn_alloc(KM_SLEEP); 99fa9e4066Sahrens zp->z_vnode->v_data = (caddr_t)zp; 100fa9e4066Sahrens mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL); 101fa9e4066Sahrens rw_init(&zp->z_map_lock, NULL, RW_DEFAULT, NULL); 102104e2ed7Sperrin rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL); 103af2c4821Smaybee rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL); 104fa9e4066Sahrens mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL); 105104e2ed7Sperrin 106104e2ed7Sperrin mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL); 107104e2ed7Sperrin avl_create(&zp->z_range_avl, zfs_range_compare, 108104e2ed7Sperrin sizeof (rl_t), offsetof(rl_t, r_node)); 109104e2ed7Sperrin 110*4ccbb6e7Sahrens zp->z_dbuf = NULL; 111fa9e4066Sahrens zp->z_dirlocks = 0; 112fa9e4066Sahrens return (0); 113fa9e4066Sahrens } 114fa9e4066Sahrens 115fa9e4066Sahrens /*ARGSUSED*/ 116fa9e4066Sahrens static void 117fa9e4066Sahrens zfs_znode_cache_destructor(void *buf, void *cdarg) 118fa9e4066Sahrens { 119fa9e4066Sahrens znode_t *zp = buf; 120fa9e4066Sahrens 121fa9e4066Sahrens ASSERT(zp->z_dirlocks == 0); 122fa9e4066Sahrens mutex_destroy(&zp->z_lock); 123fa9e4066Sahrens rw_destroy(&zp->z_map_lock); 124104e2ed7Sperrin rw_destroy(&zp->z_parent_lock); 125af2c4821Smaybee rw_destroy(&zp->z_name_lock); 126fa9e4066Sahrens mutex_destroy(&zp->z_acl_lock); 127104e2ed7Sperrin avl_destroy(&zp->z_range_avl); 128c25056deSgw mutex_destroy(&zp->z_range_lock); 129fa9e4066Sahrens 130*4ccbb6e7Sahrens ASSERT(zp->z_dbuf == NULL); 131fa9e4066Sahrens ASSERT(ZTOV(zp)->v_count == 0); 132fa9e4066Sahrens vn_free(ZTOV(zp)); 133fa9e4066Sahrens } 134fa9e4066Sahrens 135fa9e4066Sahrens void 136fa9e4066Sahrens zfs_znode_init(void) 137fa9e4066Sahrens { 138fa9e4066Sahrens /* 139fa9e4066Sahrens * Initialize zcache 140fa9e4066Sahrens */ 141fa9e4066Sahrens ASSERT(znode_cache == NULL); 142fa9e4066Sahrens znode_cache = kmem_cache_create("zfs_znode_cache", 143fa9e4066Sahrens sizeof (znode_t), 0, zfs_znode_cache_constructor, 144fa9e4066Sahrens zfs_znode_cache_destructor, NULL, NULL, NULL, 0); 145fa9e4066Sahrens } 146fa9e4066Sahrens 147fa9e4066Sahrens void 148fa9e4066Sahrens zfs_znode_fini(void) 149fa9e4066Sahrens { 150fa9e4066Sahrens /* 151fa9e4066Sahrens * Cleanup vfs & vnode ops 152fa9e4066Sahrens */ 153fa9e4066Sahrens zfs_remove_op_tables(); 154fa9e4066Sahrens 155fa9e4066Sahrens /* 156fa9e4066Sahrens * Cleanup zcache 157fa9e4066Sahrens */ 158fa9e4066Sahrens if (znode_cache) 159fa9e4066Sahrens kmem_cache_destroy(znode_cache); 160fa9e4066Sahrens znode_cache = NULL; 161fa9e4066Sahrens } 162fa9e4066Sahrens 163fa9e4066Sahrens struct vnodeops *zfs_dvnodeops; 164fa9e4066Sahrens struct vnodeops *zfs_fvnodeops; 165fa9e4066Sahrens struct vnodeops *zfs_symvnodeops; 166fa9e4066Sahrens struct vnodeops *zfs_xdvnodeops; 167fa9e4066Sahrens struct vnodeops *zfs_evnodeops; 168fa9e4066Sahrens 169fa9e4066Sahrens void 170fa9e4066Sahrens zfs_remove_op_tables() 171fa9e4066Sahrens { 172fa9e4066Sahrens /* 173fa9e4066Sahrens * Remove vfs ops 174fa9e4066Sahrens */ 175fa9e4066Sahrens ASSERT(zfsfstype); 176fa9e4066Sahrens (void) vfs_freevfsops_by_type(zfsfstype); 177fa9e4066Sahrens zfsfstype = 0; 178fa9e4066Sahrens 179fa9e4066Sahrens /* 180fa9e4066Sahrens * Remove vnode ops 181fa9e4066Sahrens */ 182fa9e4066Sahrens if (zfs_dvnodeops) 183fa9e4066Sahrens vn_freevnodeops(zfs_dvnodeops); 184fa9e4066Sahrens if (zfs_fvnodeops) 185fa9e4066Sahrens vn_freevnodeops(zfs_fvnodeops); 186fa9e4066Sahrens if (zfs_symvnodeops) 187fa9e4066Sahrens vn_freevnodeops(zfs_symvnodeops); 188fa9e4066Sahrens if (zfs_xdvnodeops) 189fa9e4066Sahrens vn_freevnodeops(zfs_xdvnodeops); 190fa9e4066Sahrens if (zfs_evnodeops) 191fa9e4066Sahrens vn_freevnodeops(zfs_evnodeops); 192fa9e4066Sahrens 193fa9e4066Sahrens zfs_dvnodeops = NULL; 194fa9e4066Sahrens zfs_fvnodeops = NULL; 195fa9e4066Sahrens zfs_symvnodeops = NULL; 196fa9e4066Sahrens zfs_xdvnodeops = NULL; 197fa9e4066Sahrens zfs_evnodeops = NULL; 198fa9e4066Sahrens } 199fa9e4066Sahrens 200fa9e4066Sahrens extern const fs_operation_def_t zfs_dvnodeops_template[]; 201fa9e4066Sahrens extern const fs_operation_def_t zfs_fvnodeops_template[]; 202fa9e4066Sahrens extern const fs_operation_def_t zfs_xdvnodeops_template[]; 203fa9e4066Sahrens extern const fs_operation_def_t zfs_symvnodeops_template[]; 204fa9e4066Sahrens extern const fs_operation_def_t zfs_evnodeops_template[]; 205fa9e4066Sahrens 206fa9e4066Sahrens int 207fa9e4066Sahrens zfs_create_op_tables() 208fa9e4066Sahrens { 209fa9e4066Sahrens int error; 210fa9e4066Sahrens 211fa9e4066Sahrens /* 212fa9e4066Sahrens * zfs_dvnodeops can be set if mod_remove() calls mod_installfs() 213fa9e4066Sahrens * due to a failure to remove the the 2nd modlinkage (zfs_modldrv). 214fa9e4066Sahrens * In this case we just return as the ops vectors are already set up. 215fa9e4066Sahrens */ 216fa9e4066Sahrens if (zfs_dvnodeops) 217fa9e4066Sahrens return (0); 218fa9e4066Sahrens 219fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template, 220fa9e4066Sahrens &zfs_dvnodeops); 221fa9e4066Sahrens if (error) 222fa9e4066Sahrens return (error); 223fa9e4066Sahrens 224fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template, 225fa9e4066Sahrens &zfs_fvnodeops); 226fa9e4066Sahrens if (error) 227fa9e4066Sahrens return (error); 228fa9e4066Sahrens 229fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template, 230fa9e4066Sahrens &zfs_symvnodeops); 231fa9e4066Sahrens if (error) 232fa9e4066Sahrens return (error); 233fa9e4066Sahrens 234fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template, 235fa9e4066Sahrens &zfs_xdvnodeops); 236fa9e4066Sahrens if (error) 237fa9e4066Sahrens return (error); 238fa9e4066Sahrens 239fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template, 240fa9e4066Sahrens &zfs_evnodeops); 241fa9e4066Sahrens 242fa9e4066Sahrens return (error); 243fa9e4066Sahrens } 244fa9e4066Sahrens 245fa9e4066Sahrens /* 246fa9e4066Sahrens * zfs_init_fs - Initialize the zfsvfs struct and the file system 247fa9e4066Sahrens * incore "master" object. Verify version compatibility. 248fa9e4066Sahrens */ 249fa9e4066Sahrens int 250fa9e4066Sahrens zfs_init_fs(zfsvfs_t *zfsvfs, znode_t **zpp, cred_t *cr) 251fa9e4066Sahrens { 252fa9e4066Sahrens extern int zfsfstype; 253fa9e4066Sahrens 254fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 255fa9e4066Sahrens int i, error; 256fa9e4066Sahrens dmu_object_info_t doi; 257a2eea2e1Sahrens uint64_t fsid_guid; 258fa9e4066Sahrens 259fa9e4066Sahrens *zpp = NULL; 260fa9e4066Sahrens 261fa9e4066Sahrens /* 262fa9e4066Sahrens * XXX - hack to auto-create the pool root filesystem at 263fa9e4066Sahrens * the first attempted mount. 264fa9e4066Sahrens */ 265fa9e4066Sahrens if (dmu_object_info(os, MASTER_NODE_OBJ, &doi) == ENOENT) { 266fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(os); 267da6c28aaSamw uint64_t zpl_version; 268fa9e4066Sahrens 269ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, TRUE, NULL); /* master */ 270ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, TRUE, NULL); /* del queue */ 271fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); /* root node */ 272fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 273fa9e4066Sahrens ASSERT3U(error, ==, 0); 274da6c28aaSamw if (spa_version(dmu_objset_spa(os)) >= SPA_VERSION_FUID) 275da6c28aaSamw zpl_version = ZPL_VERSION; 276da6c28aaSamw else 277da6c28aaSamw zpl_version = ZPL_VERSION_FUID - 1; 278da6c28aaSamw zfs_create_fs(os, cr, zpl_version, 0, tx); 279fa9e4066Sahrens dmu_tx_commit(tx); 280fa9e4066Sahrens } 281fa9e4066Sahrens 282e7437265Sahrens error = zap_lookup(os, MASTER_NODE_OBJ, ZPL_VERSION_STR, 8, 1, 283e7437265Sahrens &zfsvfs->z_version); 284ea8dc4b6Seschrock if (error) { 285ea8dc4b6Seschrock return (error); 286e7437265Sahrens } else if (zfsvfs->z_version > ZPL_VERSION) { 287fa9e4066Sahrens (void) printf("Mismatched versions: File system " 288fa9e4066Sahrens "is version %lld on-disk format, which is " 289fa9e4066Sahrens "incompatible with this software version %lld!", 290e7437265Sahrens (u_longlong_t)zfsvfs->z_version, ZPL_VERSION); 291fa9e4066Sahrens return (ENOTSUP); 292fa9e4066Sahrens } 293fa9e4066Sahrens 294fa9e4066Sahrens /* 295fa9e4066Sahrens * The fsid is 64 bits, composed of an 8-bit fs type, which 296fa9e4066Sahrens * separates our fsid from any other filesystem types, and a 297fa9e4066Sahrens * 56-bit objset unique ID. The objset unique ID is unique to 298fa9e4066Sahrens * all objsets open on this system, provided by unique_create(). 299fa9e4066Sahrens * The 8-bit fs type must be put in the low bits of fsid[1] 300fa9e4066Sahrens * because that's where other Solaris filesystems put it. 301fa9e4066Sahrens */ 302a2eea2e1Sahrens fsid_guid = dmu_objset_fsid_guid(os); 303a2eea2e1Sahrens ASSERT((fsid_guid & ~((1ULL<<56)-1)) == 0); 304a2eea2e1Sahrens zfsvfs->z_vfs->vfs_fsid.val[0] = fsid_guid; 305a2eea2e1Sahrens zfsvfs->z_vfs->vfs_fsid.val[1] = ((fsid_guid>>32) << 8) | 306fa9e4066Sahrens zfsfstype & 0xFF; 307fa9e4066Sahrens 308893a6d32Sahrens error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, 309893a6d32Sahrens &zfsvfs->z_root); 310ea8dc4b6Seschrock if (error) 311ea8dc4b6Seschrock return (error); 312893a6d32Sahrens ASSERT(zfsvfs->z_root != 0); 313fa9e4066Sahrens 314c25056deSgw error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1, 315c25056deSgw &zfsvfs->z_unlinkedobj); 316c25056deSgw if (error) 317c25056deSgw return (error); 318c25056deSgw 319fa9e4066Sahrens /* 320fa9e4066Sahrens * Initialize zget mutex's 321fa9e4066Sahrens */ 322fa9e4066Sahrens for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 323fa9e4066Sahrens mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); 324fa9e4066Sahrens 325893a6d32Sahrens error = zfs_zget(zfsvfs, zfsvfs->z_root, zpp); 326c25056deSgw if (error) { 327c25056deSgw /* 328c25056deSgw * On error, we destroy the mutexes here since it's not 329c25056deSgw * possible for the caller to determine if the mutexes were 330c25056deSgw * initialized properly. 331c25056deSgw */ 332c25056deSgw for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 333c25056deSgw mutex_destroy(&zfsvfs->z_hold_mtx[i]); 334fa9e4066Sahrens return (error); 335c25056deSgw } 336893a6d32Sahrens ASSERT3U((*zpp)->z_id, ==, zfsvfs->z_root); 337da6c28aaSamw error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1, 338da6c28aaSamw &zfsvfs->z_fuid_obj); 339da6c28aaSamw if (error == ENOENT) 340da6c28aaSamw error = 0; 341da6c28aaSamw 342fa9e4066Sahrens return (0); 343fa9e4066Sahrens } 344fa9e4066Sahrens 34572fc53bcSmarks /* 34672fc53bcSmarks * define a couple of values we need available 34772fc53bcSmarks * for both 64 and 32 bit environments. 34872fc53bcSmarks */ 34972fc53bcSmarks #ifndef NBITSMINOR64 35072fc53bcSmarks #define NBITSMINOR64 32 35172fc53bcSmarks #endif 35272fc53bcSmarks #ifndef MAXMAJ64 35372fc53bcSmarks #define MAXMAJ64 0xffffffffUL 35472fc53bcSmarks #endif 35572fc53bcSmarks #ifndef MAXMIN64 35672fc53bcSmarks #define MAXMIN64 0xffffffffUL 35772fc53bcSmarks #endif 35872fc53bcSmarks 35972fc53bcSmarks /* 36072fc53bcSmarks * Create special expldev for ZFS private use. 36172fc53bcSmarks * Can't use standard expldev since it doesn't do 36272fc53bcSmarks * what we want. The standard expldev() takes a 36372fc53bcSmarks * dev32_t in LP64 and expands it to a long dev_t. 36472fc53bcSmarks * We need an interface that takes a dev32_t in ILP32 36572fc53bcSmarks * and expands it to a long dev_t. 36672fc53bcSmarks */ 36772fc53bcSmarks static uint64_t 36872fc53bcSmarks zfs_expldev(dev_t dev) 36972fc53bcSmarks { 37072fc53bcSmarks #ifndef _LP64 37172fc53bcSmarks major_t major = (major_t)dev >> NBITSMINOR32 & MAXMAJ32; 37272fc53bcSmarks return (((uint64_t)major << NBITSMINOR64) | 37372fc53bcSmarks ((minor_t)dev & MAXMIN32)); 37472fc53bcSmarks #else 37572fc53bcSmarks return (dev); 37672fc53bcSmarks #endif 37772fc53bcSmarks } 37872fc53bcSmarks 37972fc53bcSmarks /* 38072fc53bcSmarks * Special cmpldev for ZFS private use. 38172fc53bcSmarks * Can't use standard cmpldev since it takes 38272fc53bcSmarks * a long dev_t and compresses it to dev32_t in 38372fc53bcSmarks * LP64. We need to do a compaction of a long dev_t 38472fc53bcSmarks * to a dev32_t in ILP32. 38572fc53bcSmarks */ 38672fc53bcSmarks dev_t 38772fc53bcSmarks zfs_cmpldev(uint64_t dev) 38872fc53bcSmarks { 38972fc53bcSmarks #ifndef _LP64 39072fc53bcSmarks minor_t minor = (minor_t)dev & MAXMIN64; 39172fc53bcSmarks major_t major = (major_t)(dev >> NBITSMINOR64) & MAXMAJ64; 39272fc53bcSmarks 39372fc53bcSmarks if (major > MAXMAJ32 || minor > MAXMIN32) 39472fc53bcSmarks return (NODEV32); 39572fc53bcSmarks 39672fc53bcSmarks return (((dev32_t)major << NBITSMINOR32) | minor); 39772fc53bcSmarks #else 39872fc53bcSmarks return (dev); 39972fc53bcSmarks #endif 40072fc53bcSmarks } 40172fc53bcSmarks 402*4ccbb6e7Sahrens static void 403*4ccbb6e7Sahrens zfs_znode_dmu_init(znode_t *zp, dmu_buf_t *db) 404*4ccbb6e7Sahrens { 405*4ccbb6e7Sahrens znode_t *nzp; 406*4ccbb6e7Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 407*4ccbb6e7Sahrens 408*4ccbb6e7Sahrens ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp))); 409*4ccbb6e7Sahrens 410*4ccbb6e7Sahrens mutex_enter(&zp->z_lock); 411*4ccbb6e7Sahrens 412*4ccbb6e7Sahrens ASSERT(zp->z_dbuf == NULL); 413*4ccbb6e7Sahrens zp->z_dbuf = db; 414*4ccbb6e7Sahrens nzp = dmu_buf_set_user_ie(db, zp, &zp->z_phys, znode_pageout_func); 415*4ccbb6e7Sahrens 416*4ccbb6e7Sahrens /* 417*4ccbb6e7Sahrens * there should be no 418*4ccbb6e7Sahrens * concurrent zgets on this object. 419*4ccbb6e7Sahrens */ 420*4ccbb6e7Sahrens if (nzp != NULL) 421*4ccbb6e7Sahrens panic("existing znode %p for dbuf %p", nzp, db); 422*4ccbb6e7Sahrens 423*4ccbb6e7Sahrens /* 424*4ccbb6e7Sahrens * Slap on VROOT if we are the root znode 425*4ccbb6e7Sahrens */ 426*4ccbb6e7Sahrens if (zp->z_id == zfsvfs->z_root) 427*4ccbb6e7Sahrens ZTOV(zp)->v_flag |= VROOT; 428*4ccbb6e7Sahrens 429*4ccbb6e7Sahrens mutex_exit(&zp->z_lock); 430*4ccbb6e7Sahrens vn_exists(ZTOV(zp)); 431*4ccbb6e7Sahrens } 432*4ccbb6e7Sahrens 433*4ccbb6e7Sahrens static void 434*4ccbb6e7Sahrens zfs_znode_dmu_fini(znode_t *zp) 435*4ccbb6e7Sahrens { 436*4ccbb6e7Sahrens dmu_buf_t *db = zp->z_dbuf; 437*4ccbb6e7Sahrens ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp))); 438*4ccbb6e7Sahrens ASSERT(zp->z_dbuf != NULL); 439*4ccbb6e7Sahrens zp->z_dbuf = NULL; 440*4ccbb6e7Sahrens dmu_buf_rele(db, NULL); 441*4ccbb6e7Sahrens } 442*4ccbb6e7Sahrens 443fa9e4066Sahrens /* 444fa9e4066Sahrens * Construct a new znode/vnode and intialize. 445fa9e4066Sahrens * 446fa9e4066Sahrens * This does not do a call to dmu_set_user() that is 447fa9e4066Sahrens * up to the caller to do, in case you don't want to 448fa9e4066Sahrens * return the znode 449fa9e4066Sahrens */ 450ea8dc4b6Seschrock static znode_t * 451*4ccbb6e7Sahrens zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz) 452fa9e4066Sahrens { 453fa9e4066Sahrens znode_t *zp; 454fa9e4066Sahrens vnode_t *vp; 455fa9e4066Sahrens 456fa9e4066Sahrens zp = kmem_cache_alloc(znode_cache, KM_SLEEP); 457fa9e4066Sahrens 458fa9e4066Sahrens ASSERT(zp->z_dirlocks == NULL); 459*4ccbb6e7Sahrens ASSERT(zp->z_dbuf == NULL); 460fa9e4066Sahrens 461*4ccbb6e7Sahrens zp->z_phys = NULL; 462fa9e4066Sahrens zp->z_zfsvfs = zfsvfs; 463893a6d32Sahrens zp->z_unlinked = 0; 464fa9e4066Sahrens zp->z_atime_dirty = 0; 465fa9e4066Sahrens zp->z_mapcnt = 0; 466fa9e4066Sahrens zp->z_last_itx = 0; 467*4ccbb6e7Sahrens zp->z_id = db->db_object; 468fa9e4066Sahrens zp->z_blksz = blksz; 469fa9e4066Sahrens zp->z_seq = 0x7A4653; 47067bd71c6Sperrin zp->z_sync_cnt = 0; 471*4ccbb6e7Sahrens 472*4ccbb6e7Sahrens vp = ZTOV(zp); 473*4ccbb6e7Sahrens vn_reinit(vp); 474*4ccbb6e7Sahrens 475*4ccbb6e7Sahrens zfs_znode_dmu_init(zp, db); 476*4ccbb6e7Sahrens 477f18faf3fSek zp->z_gen = zp->z_phys->zp_gen; 478fa9e4066Sahrens 479fa9e4066Sahrens mutex_enter(&zfsvfs->z_znodes_lock); 480fa9e4066Sahrens list_insert_tail(&zfsvfs->z_all_znodes, zp); 481fa9e4066Sahrens mutex_exit(&zfsvfs->z_znodes_lock); 482fa9e4066Sahrens 483fa9e4066Sahrens vp->v_vfsp = zfsvfs->z_parent->z_vfs; 484fa9e4066Sahrens vp->v_type = IFTOVT((mode_t)zp->z_phys->zp_mode); 485fa9e4066Sahrens 486fa9e4066Sahrens switch (vp->v_type) { 487fa9e4066Sahrens case VDIR: 488fa9e4066Sahrens if (zp->z_phys->zp_flags & ZFS_XATTR) { 489fa9e4066Sahrens vn_setops(vp, zfs_xdvnodeops); 490fa9e4066Sahrens vp->v_flag |= V_XATTRDIR; 491*4ccbb6e7Sahrens } else { 492fa9e4066Sahrens vn_setops(vp, zfs_dvnodeops); 493*4ccbb6e7Sahrens } 4947f6e3e7dSperrin zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */ 495fa9e4066Sahrens break; 496fa9e4066Sahrens case VBLK: 497fa9e4066Sahrens case VCHR: 49872fc53bcSmarks vp->v_rdev = zfs_cmpldev(zp->z_phys->zp_rdev); 499fa9e4066Sahrens /*FALLTHROUGH*/ 500fa9e4066Sahrens case VFIFO: 501fa9e4066Sahrens case VSOCK: 502fa9e4066Sahrens case VDOOR: 503fa9e4066Sahrens vn_setops(vp, zfs_fvnodeops); 504fa9e4066Sahrens break; 505fa9e4066Sahrens case VREG: 506fa9e4066Sahrens vp->v_flag |= VMODSORT; 507fa9e4066Sahrens vn_setops(vp, zfs_fvnodeops); 508fa9e4066Sahrens break; 509fa9e4066Sahrens case VLNK: 510fa9e4066Sahrens vn_setops(vp, zfs_symvnodeops); 511fa9e4066Sahrens break; 512fa9e4066Sahrens default: 513fa9e4066Sahrens vn_setops(vp, zfs_evnodeops); 514fa9e4066Sahrens break; 515fa9e4066Sahrens } 516fa9e4066Sahrens 517*4ccbb6e7Sahrens /* it can be NULL from zfs_create_fs */ 518*4ccbb6e7Sahrens if (zfsvfs->z_vfs) 519*4ccbb6e7Sahrens VFS_HOLD(zfsvfs->z_vfs); 520fa9e4066Sahrens return (zp); 521fa9e4066Sahrens } 522fa9e4066Sahrens 523fa9e4066Sahrens /* 524fa9e4066Sahrens * Create a new DMU object to hold a zfs znode. 525fa9e4066Sahrens * 526fa9e4066Sahrens * IN: dzp - parent directory for new znode 527fa9e4066Sahrens * vap - file attributes for new znode 528fa9e4066Sahrens * tx - dmu transaction id for zap operations 529fa9e4066Sahrens * cr - credentials of caller 530fa9e4066Sahrens * flag - flags: 531fa9e4066Sahrens * IS_ROOT_NODE - new object will be root 532fa9e4066Sahrens * IS_XATTR - new object is an attribute 533fa9e4066Sahrens * IS_REPLAY - intent log replay 534da6c28aaSamw * bonuslen - length of bonus buffer 535da6c28aaSamw * setaclp - File/Dir initial ACL 536da6c28aaSamw * fuidp - Tracks fuid allocation. 537fa9e4066Sahrens * 538*4ccbb6e7Sahrens * OUT: zpp - allocated znode 539fa9e4066Sahrens * 540fa9e4066Sahrens */ 541fa9e4066Sahrens void 542*4ccbb6e7Sahrens zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr, 543da6c28aaSamw uint_t flag, znode_t **zpp, int bonuslen, zfs_acl_t *setaclp, 544da6c28aaSamw zfs_fuid_info_t **fuidp) 545fa9e4066Sahrens { 546*4ccbb6e7Sahrens dmu_buf_t *db; 547fa9e4066Sahrens znode_phys_t *pzp; 548fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 549fa9e4066Sahrens timestruc_t now; 550*4ccbb6e7Sahrens uint64_t gen, obj; 551fa9e4066Sahrens int err; 552fa9e4066Sahrens 553fa9e4066Sahrens ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE)); 554fa9e4066Sahrens 555fa9e4066Sahrens if (zfsvfs->z_assign >= TXG_INITIAL) { /* ZIL replay */ 556*4ccbb6e7Sahrens obj = vap->va_nodeid; 557fa9e4066Sahrens flag |= IS_REPLAY; 558fa9e4066Sahrens now = vap->va_ctime; /* see zfs_replay_create() */ 559fa9e4066Sahrens gen = vap->va_nblocks; /* ditto */ 560fa9e4066Sahrens } else { 561*4ccbb6e7Sahrens obj = 0; 562fa9e4066Sahrens gethrestime(&now); 563fa9e4066Sahrens gen = dmu_tx_get_txg(tx); 564fa9e4066Sahrens } 565fa9e4066Sahrens 566fa9e4066Sahrens /* 567fa9e4066Sahrens * Create a new DMU object. 568fa9e4066Sahrens */ 569ea8dc4b6Seschrock /* 570ea8dc4b6Seschrock * There's currently no mechanism for pre-reading the blocks that will 571ea8dc4b6Seschrock * be to needed allocate a new object, so we accept the small chance 572ea8dc4b6Seschrock * that there will be an i/o error and we will fail one of the 573ea8dc4b6Seschrock * assertions below. 574ea8dc4b6Seschrock */ 575fa9e4066Sahrens if (vap->va_type == VDIR) { 576fa9e4066Sahrens if (flag & IS_REPLAY) { 577*4ccbb6e7Sahrens err = zap_create_claim_norm(zfsvfs->z_os, obj, 578da6c28aaSamw zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS, 579fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 580fa9e4066Sahrens ASSERT3U(err, ==, 0); 581fa9e4066Sahrens } else { 582*4ccbb6e7Sahrens obj = zap_create_norm(zfsvfs->z_os, 583da6c28aaSamw zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS, 584fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 585fa9e4066Sahrens } 586fa9e4066Sahrens } else { 587fa9e4066Sahrens if (flag & IS_REPLAY) { 588*4ccbb6e7Sahrens err = dmu_object_claim(zfsvfs->z_os, obj, 589fa9e4066Sahrens DMU_OT_PLAIN_FILE_CONTENTS, 0, 590fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 591fa9e4066Sahrens ASSERT3U(err, ==, 0); 592fa9e4066Sahrens } else { 593*4ccbb6e7Sahrens obj = dmu_object_alloc(zfsvfs->z_os, 594fa9e4066Sahrens DMU_OT_PLAIN_FILE_CONTENTS, 0, 595fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 596fa9e4066Sahrens } 597fa9e4066Sahrens } 598*4ccbb6e7Sahrens VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, obj, NULL, &db)); 599*4ccbb6e7Sahrens dmu_buf_will_dirty(db, tx); 600fa9e4066Sahrens 601fa9e4066Sahrens /* 602fa9e4066Sahrens * Initialize the znode physical data to zero. 603fa9e4066Sahrens */ 604*4ccbb6e7Sahrens ASSERT(db->db_size >= sizeof (znode_phys_t)); 605*4ccbb6e7Sahrens bzero(db->db_data, db->db_size); 606*4ccbb6e7Sahrens pzp = db->db_data; 607fa9e4066Sahrens 608fa9e4066Sahrens /* 609fa9e4066Sahrens * If this is the root, fix up the half-initialized parent pointer 610fa9e4066Sahrens * to reference the just-allocated physical data area. 611fa9e4066Sahrens */ 612fa9e4066Sahrens if (flag & IS_ROOT_NODE) { 613fa9e4066Sahrens dzp->z_phys = pzp; 614*4ccbb6e7Sahrens dzp->z_id = obj; 615fa9e4066Sahrens } 616fa9e4066Sahrens 617fa9e4066Sahrens /* 618fa9e4066Sahrens * If parent is an xattr, so am I. 619fa9e4066Sahrens */ 620fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) 621fa9e4066Sahrens flag |= IS_XATTR; 622fa9e4066Sahrens 623fa9e4066Sahrens if (vap->va_type == VBLK || vap->va_type == VCHR) { 62472fc53bcSmarks pzp->zp_rdev = zfs_expldev(vap->va_rdev); 625fa9e4066Sahrens } 626fa9e4066Sahrens 627da6c28aaSamw if (zfsvfs->z_use_fuids) 628da6c28aaSamw pzp->zp_flags = ZFS_ARCHIVE | ZFS_AV_MODIFIED; 629da6c28aaSamw 630fa9e4066Sahrens if (vap->va_type == VDIR) { 631fa9e4066Sahrens pzp->zp_size = 2; /* contents ("." and "..") */ 632fa9e4066Sahrens pzp->zp_links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1; 633fa9e4066Sahrens } 634fa9e4066Sahrens 635fa9e4066Sahrens pzp->zp_parent = dzp->z_id; 636fa9e4066Sahrens if (flag & IS_XATTR) 637fa9e4066Sahrens pzp->zp_flags |= ZFS_XATTR; 638fa9e4066Sahrens 639fa9e4066Sahrens pzp->zp_gen = gen; 640fa9e4066Sahrens 641fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_crtime); 642fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_ctime); 643fa9e4066Sahrens 644fa9e4066Sahrens if (vap->va_mask & AT_ATIME) { 645fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 646fa9e4066Sahrens } else { 647fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_atime); 648fa9e4066Sahrens } 649fa9e4066Sahrens 650fa9e4066Sahrens if (vap->va_mask & AT_MTIME) { 651fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 652fa9e4066Sahrens } else { 653fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_mtime); 654fa9e4066Sahrens } 655fa9e4066Sahrens 656fa9e4066Sahrens pzp->zp_mode = MAKEIMODE(vap->va_type, vap->va_mode); 657*4ccbb6e7Sahrens ZFS_OBJ_HOLD_ENTER(zfsvfs, obj) 658*4ccbb6e7Sahrens *zpp = zfs_znode_alloc(zfsvfs, db, 0); 659*4ccbb6e7Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, obj); 660*4ccbb6e7Sahrens zfs_perm_init(*zpp, dzp, flag, vap, tx, cr, setaclp, fuidp); 661fa9e4066Sahrens } 662fa9e4066Sahrens 663da6c28aaSamw void 664da6c28aaSamw zfs_xvattr_set(znode_t *zp, xvattr_t *xvap) 665da6c28aaSamw { 666da6c28aaSamw xoptattr_t *xoap; 667da6c28aaSamw 668da6c28aaSamw xoap = xva_getxoptattr(xvap); 669da6c28aaSamw ASSERT(xoap); 670da6c28aaSamw 671da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { 672da6c28aaSamw ZFS_TIME_ENCODE(&xoap->xoa_createtime, zp->z_phys->zp_crtime); 673da6c28aaSamw XVA_SET_RTN(xvap, XAT_CREATETIME); 674da6c28aaSamw } 675da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { 676da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_READONLY, xoap->xoa_readonly); 677da6c28aaSamw XVA_SET_RTN(xvap, XAT_READONLY); 678da6c28aaSamw } 679da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { 680da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_HIDDEN, xoap->xoa_hidden); 681da6c28aaSamw XVA_SET_RTN(xvap, XAT_HIDDEN); 682da6c28aaSamw } 683da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { 684da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_SYSTEM, xoap->xoa_system); 685da6c28aaSamw XVA_SET_RTN(xvap, XAT_SYSTEM); 686da6c28aaSamw } 687da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { 688da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_ARCHIVE, xoap->xoa_archive); 689da6c28aaSamw XVA_SET_RTN(xvap, XAT_ARCHIVE); 690da6c28aaSamw } 691da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 692da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_IMMUTABLE, xoap->xoa_immutable); 693da6c28aaSamw XVA_SET_RTN(xvap, XAT_IMMUTABLE); 694da6c28aaSamw } 695da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 696da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_NOUNLINK, xoap->xoa_nounlink); 697da6c28aaSamw XVA_SET_RTN(xvap, XAT_NOUNLINK); 698da6c28aaSamw } 699da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 700da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_APPENDONLY, xoap->xoa_appendonly); 701da6c28aaSamw XVA_SET_RTN(xvap, XAT_APPENDONLY); 702da6c28aaSamw } 703da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 704da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_NODUMP, xoap->xoa_nodump); 705da6c28aaSamw XVA_SET_RTN(xvap, XAT_NODUMP); 706da6c28aaSamw } 707da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { 708da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_OPAQUE, xoap->xoa_opaque); 709da6c28aaSamw XVA_SET_RTN(xvap, XAT_OPAQUE); 710da6c28aaSamw } 711da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 712da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_AV_QUARANTINED, 713da6c28aaSamw xoap->xoa_av_quarantined); 714da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); 715da6c28aaSamw } 716da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 717da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_AV_MODIFIED, xoap->xoa_av_modified); 718da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_MODIFIED); 719da6c28aaSamw } 720da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) { 721da6c28aaSamw (void) memcpy(zp->z_phys + 1, xoap->xoa_av_scanstamp, 722da6c28aaSamw sizeof (xoap->xoa_av_scanstamp)); 723da6c28aaSamw zp->z_phys->zp_flags |= ZFS_BONUS_SCANSTAMP; 724da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); 725da6c28aaSamw } 726da6c28aaSamw } 727da6c28aaSamw 728fa9e4066Sahrens int 729fa9e4066Sahrens zfs_zget(zfsvfs_t *zfsvfs, uint64_t obj_num, znode_t **zpp) 730fa9e4066Sahrens { 731fa9e4066Sahrens dmu_object_info_t doi; 732fa9e4066Sahrens dmu_buf_t *db; 733fa9e4066Sahrens znode_t *zp; 734ea8dc4b6Seschrock int err; 735fa9e4066Sahrens 736fa9e4066Sahrens *zpp = NULL; 737fa9e4066Sahrens 738fa9e4066Sahrens ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num); 739fa9e4066Sahrens 740ea8dc4b6Seschrock err = dmu_bonus_hold(zfsvfs->z_os, obj_num, NULL, &db); 741ea8dc4b6Seschrock if (err) { 742fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 743ea8dc4b6Seschrock return (err); 744fa9e4066Sahrens } 745fa9e4066Sahrens 746fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 747fa9e4066Sahrens if (doi.doi_bonus_type != DMU_OT_ZNODE || 748fa9e4066Sahrens doi.doi_bonus_size < sizeof (znode_phys_t)) { 749ea8dc4b6Seschrock dmu_buf_rele(db, NULL); 750fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 751fa9e4066Sahrens return (EINVAL); 752fa9e4066Sahrens } 753fa9e4066Sahrens 754fa9e4066Sahrens zp = dmu_buf_get_user(db); 755fa9e4066Sahrens if (zp != NULL) { 756fa9e4066Sahrens mutex_enter(&zp->z_lock); 757fa9e4066Sahrens 758*4ccbb6e7Sahrens /* 759*4ccbb6e7Sahrens * Since we do immediate eviction of the z_dbuf, we 760*4ccbb6e7Sahrens * should never find a dbuf with a znode that doesn't 761*4ccbb6e7Sahrens * know about the dbuf. 762*4ccbb6e7Sahrens */ 763*4ccbb6e7Sahrens ASSERT3P(zp->z_dbuf, ==, db); 764fa9e4066Sahrens ASSERT3U(zp->z_id, ==, obj_num); 765893a6d32Sahrens if (zp->z_unlinked) { 766*4ccbb6e7Sahrens err = ENOENT; 767fa9e4066Sahrens } else { 768*4ccbb6e7Sahrens VN_HOLD(ZTOV(zp)); 769*4ccbb6e7Sahrens *zpp = zp; 770*4ccbb6e7Sahrens err = 0; 771fa9e4066Sahrens } 772*4ccbb6e7Sahrens dmu_buf_rele(db, NULL); 773fa9e4066Sahrens mutex_exit(&zp->z_lock); 774ea8dc4b6Seschrock ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 775*4ccbb6e7Sahrens return (err); 776fa9e4066Sahrens } 777fa9e4066Sahrens 778fa9e4066Sahrens /* 779fa9e4066Sahrens * Not found create new znode/vnode 780fa9e4066Sahrens */ 781*4ccbb6e7Sahrens zp = zfs_znode_alloc(zfsvfs, db, doi.doi_data_block_size); 782ea8dc4b6Seschrock ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 783fa9e4066Sahrens *zpp = zp; 784fa9e4066Sahrens return (0); 785fa9e4066Sahrens } 786fa9e4066Sahrens 787f18faf3fSek int 788f18faf3fSek zfs_rezget(znode_t *zp) 789f18faf3fSek { 790f18faf3fSek zfsvfs_t *zfsvfs = zp->z_zfsvfs; 791f18faf3fSek dmu_object_info_t doi; 792f18faf3fSek dmu_buf_t *db; 793f18faf3fSek uint64_t obj_num = zp->z_id; 794f18faf3fSek int err; 795f18faf3fSek 796f18faf3fSek ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num); 797f18faf3fSek 798f18faf3fSek err = dmu_bonus_hold(zfsvfs->z_os, obj_num, NULL, &db); 799f18faf3fSek if (err) { 800f18faf3fSek ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 801f18faf3fSek return (err); 802f18faf3fSek } 803f18faf3fSek 804f18faf3fSek dmu_object_info_from_db(db, &doi); 805f18faf3fSek if (doi.doi_bonus_type != DMU_OT_ZNODE || 806f18faf3fSek doi.doi_bonus_size < sizeof (znode_phys_t)) { 807f18faf3fSek dmu_buf_rele(db, NULL); 808f18faf3fSek ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 809f18faf3fSek return (EINVAL); 810f18faf3fSek } 811f18faf3fSek 812f18faf3fSek if (((znode_phys_t *)db->db_data)->zp_gen != zp->z_gen) { 813f18faf3fSek dmu_buf_rele(db, NULL); 814f18faf3fSek ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 815f18faf3fSek return (EIO); 816f18faf3fSek } 817f18faf3fSek 818*4ccbb6e7Sahrens zfs_znode_dmu_init(zp, db); 819f18faf3fSek zp->z_unlinked = (zp->z_phys->zp_links == 0); 820f18faf3fSek 821f18faf3fSek ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 822f18faf3fSek 823f18faf3fSek return (0); 824f18faf3fSek } 825f18faf3fSek 826fa9e4066Sahrens void 827fa9e4066Sahrens zfs_znode_delete(znode_t *zp, dmu_tx_t *tx) 828fa9e4066Sahrens { 829fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 830*4ccbb6e7Sahrens uint64_t obj = zp->z_id; 831fa9e4066Sahrens 832*4ccbb6e7Sahrens ZFS_OBJ_HOLD_ENTER(zfsvfs, obj); 833fa9e4066Sahrens if (zp->z_phys->zp_acl.z_acl_extern_obj) { 834*4ccbb6e7Sahrens VERIFY(0 == dmu_object_free(zfsvfs->z_os, 835*4ccbb6e7Sahrens zp->z_phys->zp_acl.z_acl_extern_obj, tx)); 836fa9e4066Sahrens } 837*4ccbb6e7Sahrens VERIFY(0 == dmu_object_free(zfsvfs->z_os, obj, tx)); 838*4ccbb6e7Sahrens zfs_znode_dmu_fini(zp); 839*4ccbb6e7Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, obj); 840fa9e4066Sahrens } 841fa9e4066Sahrens 842fa9e4066Sahrens void 843fa9e4066Sahrens zfs_zinactive(znode_t *zp) 844fa9e4066Sahrens { 845fa9e4066Sahrens vnode_t *vp = ZTOV(zp); 846fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 847fa9e4066Sahrens uint64_t z_id = zp->z_id; 848fa9e4066Sahrens 849*4ccbb6e7Sahrens ASSERT(zp->z_dbuf && zp->z_phys); 850fa9e4066Sahrens 851fa9e4066Sahrens /* 852fa9e4066Sahrens * Don't allow a zfs_zget() while were trying to release this znode 853fa9e4066Sahrens */ 854fa9e4066Sahrens ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id); 855fa9e4066Sahrens 856fa9e4066Sahrens mutex_enter(&zp->z_lock); 857fa9e4066Sahrens mutex_enter(&vp->v_lock); 858fa9e4066Sahrens vp->v_count--; 859fa9e4066Sahrens if (vp->v_count > 0 || vn_has_cached_data(vp)) { 860fa9e4066Sahrens /* 861fa9e4066Sahrens * If the hold count is greater than zero, somebody has 862fa9e4066Sahrens * obtained a new reference on this znode while we were 863fa9e4066Sahrens * processing it here, so we are done. If we still have 864fa9e4066Sahrens * mapped pages then we are also done, since we don't 865fa9e4066Sahrens * want to inactivate the znode until the pages get pushed. 866fa9e4066Sahrens * 867fa9e4066Sahrens * XXX - if vn_has_cached_data(vp) is true, but count == 0, 868fa9e4066Sahrens * this seems like it would leave the znode hanging with 869fa9e4066Sahrens * no chance to go inactive... 870fa9e4066Sahrens */ 871fa9e4066Sahrens mutex_exit(&vp->v_lock); 872fa9e4066Sahrens mutex_exit(&zp->z_lock); 873fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); 874fa9e4066Sahrens return; 875fa9e4066Sahrens } 876fa9e4066Sahrens mutex_exit(&vp->v_lock); 877fa9e4066Sahrens 878fa9e4066Sahrens /* 879fa9e4066Sahrens * If this was the last reference to a file with no links, 880fa9e4066Sahrens * remove the file from the file system. 881fa9e4066Sahrens */ 882893a6d32Sahrens if (zp->z_unlinked) { 883fa9e4066Sahrens mutex_exit(&zp->z_lock); 884fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); 885893a6d32Sahrens zfs_rmnode(zp); 886fa9e4066Sahrens VFS_RELE(zfsvfs->z_vfs); 887fa9e4066Sahrens return; 888fa9e4066Sahrens } 889fa9e4066Sahrens mutex_exit(&zp->z_lock); 890*4ccbb6e7Sahrens zfs_znode_dmu_fini(zp); 891fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); 892*4ccbb6e7Sahrens /* it can be NULL from zfs_create_fs */ 893*4ccbb6e7Sahrens if (zfsvfs->z_vfs) 894*4ccbb6e7Sahrens VFS_RELE(zfsvfs->z_vfs); 895fa9e4066Sahrens } 896fa9e4066Sahrens 897fa9e4066Sahrens void 898fa9e4066Sahrens zfs_znode_free(znode_t *zp) 899fa9e4066Sahrens { 900fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 901fa9e4066Sahrens 902fa9e4066Sahrens mutex_enter(&zfsvfs->z_znodes_lock); 903fa9e4066Sahrens list_remove(&zfsvfs->z_all_znodes, zp); 904fa9e4066Sahrens mutex_exit(&zfsvfs->z_znodes_lock); 905fa9e4066Sahrens 906fa9e4066Sahrens kmem_cache_free(znode_cache, zp); 907fa9e4066Sahrens } 908fa9e4066Sahrens 909fa9e4066Sahrens void 910fa9e4066Sahrens zfs_time_stamper_locked(znode_t *zp, uint_t flag, dmu_tx_t *tx) 911fa9e4066Sahrens { 912fa9e4066Sahrens timestruc_t now; 913fa9e4066Sahrens 914fa9e4066Sahrens ASSERT(MUTEX_HELD(&zp->z_lock)); 915fa9e4066Sahrens 916fa9e4066Sahrens gethrestime(&now); 917fa9e4066Sahrens 918fa9e4066Sahrens if (tx) { 919fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 920fa9e4066Sahrens zp->z_atime_dirty = 0; 921fa9e4066Sahrens zp->z_seq++; 922fa9e4066Sahrens } else { 923fa9e4066Sahrens zp->z_atime_dirty = 1; 924fa9e4066Sahrens } 925fa9e4066Sahrens 926fa9e4066Sahrens if (flag & AT_ATIME) 927fa9e4066Sahrens ZFS_TIME_ENCODE(&now, zp->z_phys->zp_atime); 928fa9e4066Sahrens 929da6c28aaSamw if (flag & AT_MTIME) { 930fa9e4066Sahrens ZFS_TIME_ENCODE(&now, zp->z_phys->zp_mtime); 931da6c28aaSamw if (zp->z_zfsvfs->z_use_fuids) 932da6c28aaSamw zp->z_phys->zp_flags |= (ZFS_ARCHIVE | ZFS_AV_MODIFIED); 933da6c28aaSamw } 934fa9e4066Sahrens 935da6c28aaSamw if (flag & AT_CTIME) { 936fa9e4066Sahrens ZFS_TIME_ENCODE(&now, zp->z_phys->zp_ctime); 937da6c28aaSamw if (zp->z_zfsvfs->z_use_fuids) 938da6c28aaSamw zp->z_phys->zp_flags |= ZFS_ARCHIVE; 939da6c28aaSamw } 940fa9e4066Sahrens } 941fa9e4066Sahrens 942fa9e4066Sahrens /* 943fa9e4066Sahrens * Update the requested znode timestamps with the current time. 944fa9e4066Sahrens * If we are in a transaction, then go ahead and mark the znode 945fa9e4066Sahrens * dirty in the transaction so the timestamps will go to disk. 946fa9e4066Sahrens * Otherwise, we will get pushed next time the znode is updated 947fa9e4066Sahrens * in a transaction, or when this znode eventually goes inactive. 948fa9e4066Sahrens * 949fa9e4066Sahrens * Why is this OK? 950fa9e4066Sahrens * 1 - Only the ACCESS time is ever updated outside of a transaction. 951fa9e4066Sahrens * 2 - Multiple consecutive updates will be collapsed into a single 952fa9e4066Sahrens * znode update by the transaction grouping semantics of the DMU. 953fa9e4066Sahrens */ 954fa9e4066Sahrens void 955fa9e4066Sahrens zfs_time_stamper(znode_t *zp, uint_t flag, dmu_tx_t *tx) 956fa9e4066Sahrens { 957fa9e4066Sahrens mutex_enter(&zp->z_lock); 958fa9e4066Sahrens zfs_time_stamper_locked(zp, flag, tx); 959fa9e4066Sahrens mutex_exit(&zp->z_lock); 960fa9e4066Sahrens } 961fa9e4066Sahrens 962fa9e4066Sahrens /* 963104e2ed7Sperrin * Grow the block size for a file. 964fa9e4066Sahrens * 965fa9e4066Sahrens * IN: zp - znode of file to free data in. 966fa9e4066Sahrens * size - requested block size 967fa9e4066Sahrens * tx - open transaction. 968fa9e4066Sahrens * 969fa9e4066Sahrens * NOTE: this function assumes that the znode is write locked. 970fa9e4066Sahrens */ 971104e2ed7Sperrin void 972fa9e4066Sahrens zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx) 973fa9e4066Sahrens { 974fa9e4066Sahrens int error; 975fa9e4066Sahrens u_longlong_t dummy; 976fa9e4066Sahrens 977fa9e4066Sahrens if (size <= zp->z_blksz) 978104e2ed7Sperrin return; 979fa9e4066Sahrens /* 980fa9e4066Sahrens * If the file size is already greater than the current blocksize, 981fa9e4066Sahrens * we will not grow. If there is more than one block in a file, 982fa9e4066Sahrens * the blocksize cannot change. 983fa9e4066Sahrens */ 984fa9e4066Sahrens if (zp->z_blksz && zp->z_phys->zp_size > zp->z_blksz) 985104e2ed7Sperrin return; 986fa9e4066Sahrens 987fa9e4066Sahrens error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id, 988fa9e4066Sahrens size, 0, tx); 989fa9e4066Sahrens if (error == ENOTSUP) 990104e2ed7Sperrin return; 991fa9e4066Sahrens ASSERT3U(error, ==, 0); 992fa9e4066Sahrens 993fa9e4066Sahrens /* What blocksize did we actually get? */ 994fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &zp->z_blksz, &dummy); 995fa9e4066Sahrens } 996fa9e4066Sahrens 997fa9e4066Sahrens /* 998fa9e4066Sahrens * This is a dummy interface used when pvn_vplist_dirty() should *not* 999fa9e4066Sahrens * be calling back into the fs for a putpage(). E.g.: when truncating 1000fa9e4066Sahrens * a file, the pages being "thrown away* don't need to be written out. 1001fa9e4066Sahrens */ 1002fa9e4066Sahrens /* ARGSUSED */ 1003fa9e4066Sahrens static int 1004fa9e4066Sahrens zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp, 1005fa9e4066Sahrens int flags, cred_t *cr) 1006fa9e4066Sahrens { 1007fa9e4066Sahrens ASSERT(0); 1008fa9e4066Sahrens return (0); 1009fa9e4066Sahrens } 1010fa9e4066Sahrens 1011fa9e4066Sahrens /* 1012104e2ed7Sperrin * Free space in a file. 1013fa9e4066Sahrens * 1014fa9e4066Sahrens * IN: zp - znode of file to free data in. 10155730cc9aSmaybee * off - start of section to free. 1016fa9e4066Sahrens * len - length of section to free (0 => to EOF). 1017fa9e4066Sahrens * flag - current file open mode flags. 1018fa9e4066Sahrens * 1019fa9e4066Sahrens * RETURN: 0 if success 1020fa9e4066Sahrens * error code if failure 1021fa9e4066Sahrens */ 1022fa9e4066Sahrens int 10235730cc9aSmaybee zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log) 1024fa9e4066Sahrens { 1025fa9e4066Sahrens vnode_t *vp = ZTOV(zp); 10265730cc9aSmaybee dmu_tx_t *tx; 10275730cc9aSmaybee zfsvfs_t *zfsvfs = zp->z_zfsvfs; 10285730cc9aSmaybee zilog_t *zilog = zfsvfs->z_log; 10295730cc9aSmaybee rl_t *rl; 10305730cc9aSmaybee uint64_t end = off + len; 10315730cc9aSmaybee uint64_t size, new_blksz; 1032da6c28aaSamw uint64_t pflags = zp->z_phys->zp_flags; 1033104e2ed7Sperrin int error; 1034fa9e4066Sahrens 1035da6c28aaSamw if ((pflags & (ZFS_IMMUTABLE|ZFS_READONLY)) || 1036da6c28aaSamw off < zp->z_phys->zp_size && (pflags & ZFS_APPENDONLY)) 1037da6c28aaSamw return (EPERM); 1038da6c28aaSamw 10398ef9dde0Smarks if (ZTOV(zp)->v_type == VFIFO) 10408ef9dde0Smarks return (0); 10418ef9dde0Smarks 10425730cc9aSmaybee /* 10435730cc9aSmaybee * If we will change zp_size then lock the whole file, 10445730cc9aSmaybee * otherwise just lock the range being freed. 10455730cc9aSmaybee */ 10465730cc9aSmaybee if (len == 0 || off + len > zp->z_phys->zp_size) { 10475730cc9aSmaybee rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER); 10485730cc9aSmaybee } else { 10495730cc9aSmaybee rl = zfs_range_lock(zp, off, len, RL_WRITER); 10505730cc9aSmaybee /* recheck, in case zp_size changed */ 10515730cc9aSmaybee if (off + len > zp->z_phys->zp_size) { 10525730cc9aSmaybee /* lost race: file size changed, lock whole file */ 1053c5c6ffa0Smaybee zfs_range_unlock(rl); 10545730cc9aSmaybee rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER); 10555730cc9aSmaybee } 10565730cc9aSmaybee } 10575730cc9aSmaybee 1058fa9e4066Sahrens /* 1059fa9e4066Sahrens * Nothing to do if file already at desired length. 1060fa9e4066Sahrens */ 10615730cc9aSmaybee size = zp->z_phys->zp_size; 106275c76197Speteh if (len == 0 && size == off && off != 0) { 1063c5c6ffa0Smaybee zfs_range_unlock(rl); 1064fa9e4066Sahrens return (0); 1065fa9e4066Sahrens } 1066fa9e4066Sahrens 1067fa9e4066Sahrens /* 1068fa9e4066Sahrens * Check for any locks in the region to be freed. 1069fa9e4066Sahrens */ 1070fa9e4066Sahrens if (MANDLOCK(vp, (mode_t)zp->z_phys->zp_mode)) { 10715730cc9aSmaybee uint64_t start = off; 10725730cc9aSmaybee uint64_t extent = len; 1073fa9e4066Sahrens 10745730cc9aSmaybee if (off > size) { 1075fa9e4066Sahrens start = size; 10765730cc9aSmaybee extent += off - size; 10775730cc9aSmaybee } else if (len == 0) { 10785730cc9aSmaybee extent = size - off; 10795730cc9aSmaybee } 10805730cc9aSmaybee if (error = chklock(vp, FWRITE, start, extent, flag, NULL)) { 1081c5c6ffa0Smaybee zfs_range_unlock(rl); 1082fa9e4066Sahrens return (error); 10835730cc9aSmaybee } 1084fa9e4066Sahrens } 1085fa9e4066Sahrens 10865730cc9aSmaybee tx = dmu_tx_create(zfsvfs->z_os); 10875730cc9aSmaybee dmu_tx_hold_bonus(tx, zp->z_id); 10885730cc9aSmaybee new_blksz = 0; 10895730cc9aSmaybee if (end > size && 10905730cc9aSmaybee (!ISP2(zp->z_blksz) || zp->z_blksz < zfsvfs->z_max_blksz)) { 1091fa9e4066Sahrens /* 1092fa9e4066Sahrens * We are growing the file past the current block size. 1093fa9e4066Sahrens */ 1094fa9e4066Sahrens if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) { 1095fa9e4066Sahrens ASSERT(!ISP2(zp->z_blksz)); 1096fa9e4066Sahrens new_blksz = MIN(end, SPA_MAXBLOCKSIZE); 1097fa9e4066Sahrens } else { 1098fa9e4066Sahrens new_blksz = MIN(end, zp->z_zfsvfs->z_max_blksz); 1099fa9e4066Sahrens } 11005730cc9aSmaybee dmu_tx_hold_write(tx, zp->z_id, 0, MIN(end, new_blksz)); 11015730cc9aSmaybee } else if (off < size) { 11025730cc9aSmaybee /* 11035730cc9aSmaybee * If len == 0, we are truncating the file. 11045730cc9aSmaybee */ 11055730cc9aSmaybee dmu_tx_hold_free(tx, zp->z_id, off, len ? len : DMU_OBJECT_END); 11065730cc9aSmaybee } 11075730cc9aSmaybee 11085730cc9aSmaybee error = dmu_tx_assign(tx, zfsvfs->z_assign); 11095730cc9aSmaybee if (error) { 11108a2f1b91Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) 11118a2f1b91Sahrens dmu_tx_wait(tx); 11125730cc9aSmaybee dmu_tx_abort(tx); 1113c5c6ffa0Smaybee zfs_range_unlock(rl); 11145730cc9aSmaybee return (error); 1115fa9e4066Sahrens } 11165730cc9aSmaybee 11175730cc9aSmaybee if (new_blksz) 11185730cc9aSmaybee zfs_grow_blocksize(zp, new_blksz, tx); 11195730cc9aSmaybee 1120fa9e4066Sahrens if (end > size || len == 0) 1121fa9e4066Sahrens zp->z_phys->zp_size = end; 11225730cc9aSmaybee 11235730cc9aSmaybee if (off < size) { 11245730cc9aSmaybee objset_t *os = zfsvfs->z_os; 11255dc8af33Smaybee uint64_t rlen = len; 11265730cc9aSmaybee 11275730cc9aSmaybee if (len == 0) 11285dc8af33Smaybee rlen = -1; 11295730cc9aSmaybee else if (end > size) 11305dc8af33Smaybee rlen = size - off; 11315dc8af33Smaybee VERIFY(0 == dmu_free_range(os, zp->z_id, off, rlen, tx)); 11325730cc9aSmaybee } 11335730cc9aSmaybee 11345730cc9aSmaybee if (log) { 11355730cc9aSmaybee zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 1136b19a79ecSperrin zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len); 11375730cc9aSmaybee } 11385730cc9aSmaybee 1139c5c6ffa0Smaybee zfs_range_unlock(rl); 11405730cc9aSmaybee 11415730cc9aSmaybee dmu_tx_commit(tx); 11425730cc9aSmaybee 1143fa9e4066Sahrens /* 11445730cc9aSmaybee * Clear any mapped pages in the truncated region. This has to 11455730cc9aSmaybee * happen outside of the transaction to avoid the possibility of 11465730cc9aSmaybee * a deadlock with someone trying to push a page that we are 11475730cc9aSmaybee * about to invalidate. 1148fa9e4066Sahrens */ 1149fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 11505730cc9aSmaybee if (off < size && vn_has_cached_data(vp)) { 1151fa9e4066Sahrens page_t *pp; 11525730cc9aSmaybee uint64_t start = off & PAGEMASK; 11535730cc9aSmaybee int poff = off & PAGEOFFSET; 1154fa9e4066Sahrens 11555730cc9aSmaybee if (poff != 0 && (pp = page_lookup(vp, start, SE_SHARED))) { 1156fa9e4066Sahrens /* 1157fa9e4066Sahrens * We need to zero a partial page. 1158fa9e4066Sahrens */ 11595730cc9aSmaybee pagezero(pp, poff, PAGESIZE - poff); 1160fa9e4066Sahrens start += PAGESIZE; 1161fa9e4066Sahrens page_unlock(pp); 1162fa9e4066Sahrens } 1163fa9e4066Sahrens error = pvn_vplist_dirty(vp, start, zfs_no_putpage, 11645730cc9aSmaybee B_INVAL | B_TRUNC, NULL); 1165fa9e4066Sahrens ASSERT(error == 0); 1166fa9e4066Sahrens } 1167fa9e4066Sahrens rw_exit(&zp->z_map_lock); 1168fa9e4066Sahrens 1169fa9e4066Sahrens return (0); 1170fa9e4066Sahrens } 1171fa9e4066Sahrens 1172fa9e4066Sahrens void 1173da6c28aaSamw zfs_create_fs(objset_t *os, cred_t *cr, uint64_t version, 1174da6c28aaSamw int norm, dmu_tx_t *tx) 1175fa9e4066Sahrens { 1176fa9e4066Sahrens zfsvfs_t zfsvfs; 1177*4ccbb6e7Sahrens uint64_t moid, doid; 1178fa9e4066Sahrens int error; 1179fa9e4066Sahrens znode_t *rootzp = NULL; 1180fa9e4066Sahrens vnode_t *vp; 1181fa9e4066Sahrens vattr_t vattr; 1182*4ccbb6e7Sahrens znode_t *zp; 1183fa9e4066Sahrens 1184fa9e4066Sahrens /* 1185fa9e4066Sahrens * First attempt to create master node. 1186fa9e4066Sahrens */ 1187ea8dc4b6Seschrock /* 1188ea8dc4b6Seschrock * In an empty objset, there are no blocks to read and thus 1189ea8dc4b6Seschrock * there can be no i/o errors (which we assert below). 1190ea8dc4b6Seschrock */ 1191fa9e4066Sahrens moid = MASTER_NODE_OBJ; 1192fa9e4066Sahrens error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE, 1193fa9e4066Sahrens DMU_OT_NONE, 0, tx); 1194fa9e4066Sahrens ASSERT(error == 0); 1195fa9e4066Sahrens 1196fa9e4066Sahrens /* 1197fa9e4066Sahrens * Set starting attributes. 1198fa9e4066Sahrens */ 1199fa9e4066Sahrens 1200e7437265Sahrens error = zap_update(os, moid, ZPL_VERSION_STR, 8, 1, &version, tx); 1201fa9e4066Sahrens ASSERT(error == 0); 1202fa9e4066Sahrens 1203fa9e4066Sahrens /* 1204fa9e4066Sahrens * Create a delete queue. 1205fa9e4066Sahrens */ 1206893a6d32Sahrens doid = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx); 1207fa9e4066Sahrens 1208893a6d32Sahrens error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &doid, tx); 1209fa9e4066Sahrens ASSERT(error == 0); 1210fa9e4066Sahrens 1211fa9e4066Sahrens /* 1212fa9e4066Sahrens * Create root znode. Create minimal znode/vnode/zfsvfs 1213fa9e4066Sahrens * to allow zfs_mknode to work. 1214fa9e4066Sahrens */ 1215fa9e4066Sahrens vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 1216fa9e4066Sahrens vattr.va_type = VDIR; 1217fa9e4066Sahrens vattr.va_mode = S_IFDIR|0755; 1218ecd6cf80Smarks vattr.va_uid = crgetuid(cr); 1219ecd6cf80Smarks vattr.va_gid = crgetgid(cr); 1220fa9e4066Sahrens 1221fa9e4066Sahrens rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP); 1222fa9e4066Sahrens rootzp->z_zfsvfs = &zfsvfs; 1223893a6d32Sahrens rootzp->z_unlinked = 0; 1224fa9e4066Sahrens rootzp->z_atime_dirty = 0; 1225fa9e4066Sahrens 1226fa9e4066Sahrens vp = ZTOV(rootzp); 1227fa9e4066Sahrens vn_reinit(vp); 1228fa9e4066Sahrens vp->v_type = VDIR; 1229fa9e4066Sahrens 1230fa9e4066Sahrens bzero(&zfsvfs, sizeof (zfsvfs_t)); 1231fa9e4066Sahrens 1232fa9e4066Sahrens zfsvfs.z_os = os; 1233fa9e4066Sahrens zfsvfs.z_assign = TXG_NOWAIT; 1234fa9e4066Sahrens zfsvfs.z_parent = &zfsvfs; 1235da6c28aaSamw zfsvfs.z_version = version; 1236da6c28aaSamw zfsvfs.z_use_fuids = USE_FUIDS(version, os); 1237da6c28aaSamw zfsvfs.z_norm = norm; 1238fa9e4066Sahrens 1239fa9e4066Sahrens mutex_init(&zfsvfs.z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); 1240fa9e4066Sahrens list_create(&zfsvfs.z_all_znodes, sizeof (znode_t), 1241fa9e4066Sahrens offsetof(znode_t, z_link_node)); 1242fa9e4066Sahrens 1243*4ccbb6e7Sahrens zfs_mknode(rootzp, &vattr, tx, cr, IS_ROOT_NODE, 1244*4ccbb6e7Sahrens &zp, 0, NULL, NULL); 1245*4ccbb6e7Sahrens VN_RELE(ZTOV(zp)); 1246*4ccbb6e7Sahrens error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx); 1247fa9e4066Sahrens ASSERT(error == 0); 1248fa9e4066Sahrens 1249fa9e4066Sahrens ZTOV(rootzp)->v_count = 0; 1250fa9e4066Sahrens kmem_cache_free(znode_cache, rootzp); 1251fa9e4066Sahrens } 125255434c77Sek 1253da6c28aaSamw #endif /* _KERNEL */ 125455434c77Sek /* 125555434c77Sek * Given an object number, return its parent object number and whether 125655434c77Sek * or not the object is an extended attribute directory. 125755434c77Sek */ 125855434c77Sek static int 125955434c77Sek zfs_obj_to_pobj(objset_t *osp, uint64_t obj, uint64_t *pobjp, int *is_xattrdir) 126055434c77Sek { 126155434c77Sek dmu_buf_t *db; 126255434c77Sek dmu_object_info_t doi; 126355434c77Sek znode_phys_t *zp; 126455434c77Sek int error; 126555434c77Sek 126655434c77Sek if ((error = dmu_bonus_hold(osp, obj, FTAG, &db)) != 0) 126755434c77Sek return (error); 126855434c77Sek 126955434c77Sek dmu_object_info_from_db(db, &doi); 127055434c77Sek if (doi.doi_bonus_type != DMU_OT_ZNODE || 127155434c77Sek doi.doi_bonus_size < sizeof (znode_phys_t)) { 127255434c77Sek dmu_buf_rele(db, FTAG); 127355434c77Sek return (EINVAL); 127455434c77Sek } 127555434c77Sek 127655434c77Sek zp = db->db_data; 127755434c77Sek *pobjp = zp->zp_parent; 127855434c77Sek *is_xattrdir = ((zp->zp_flags & ZFS_XATTR) != 0) && 127955434c77Sek S_ISDIR(zp->zp_mode); 128055434c77Sek dmu_buf_rele(db, FTAG); 128155434c77Sek 128255434c77Sek return (0); 128355434c77Sek } 128455434c77Sek 128555434c77Sek int 128655434c77Sek zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len) 128755434c77Sek { 128855434c77Sek char *path = buf + len - 1; 128955434c77Sek int error; 129055434c77Sek 129155434c77Sek *path = '\0'; 129255434c77Sek 129355434c77Sek for (;;) { 129455434c77Sek uint64_t pobj; 129555434c77Sek char component[MAXNAMELEN + 2]; 129655434c77Sek size_t complen; 129755434c77Sek int is_xattrdir; 129855434c77Sek 129955434c77Sek if ((error = zfs_obj_to_pobj(osp, obj, &pobj, 130055434c77Sek &is_xattrdir)) != 0) 130155434c77Sek break; 130255434c77Sek 130355434c77Sek if (pobj == obj) { 130455434c77Sek if (path[0] != '/') 130555434c77Sek *--path = '/'; 130655434c77Sek break; 130755434c77Sek } 130855434c77Sek 130955434c77Sek component[0] = '/'; 131055434c77Sek if (is_xattrdir) { 131155434c77Sek (void) sprintf(component + 1, "<xattrdir>"); 131255434c77Sek } else { 1313e7437265Sahrens error = zap_value_search(osp, pobj, obj, 1314e7437265Sahrens ZFS_DIRENT_OBJ(-1ULL), component + 1); 131555434c77Sek if (error != 0) 131655434c77Sek break; 131755434c77Sek } 131855434c77Sek 131955434c77Sek complen = strlen(component); 132055434c77Sek path -= complen; 132155434c77Sek ASSERT(path >= buf); 132255434c77Sek bcopy(component, path, complen); 132355434c77Sek obj = pobj; 132455434c77Sek } 132555434c77Sek 132655434c77Sek if (error == 0) 132755434c77Sek (void) memmove(buf, path, buf + len - path); 132855434c77Sek return (error); 132955434c77Sek } 1330