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> 54*da6c28aaSamw #include <sys/zfs_fuid.h> 55*da6c28aaSamw #include <sys/zfs_i18n.h> 56fa9e4066Sahrens #include <sys/fs/zfs.h> 57*da6c28aaSamw #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); 82fa9e4066Sahrens if (vp->v_count == 0) { 83ea8dc4b6Seschrock mutex_exit(&zp->z_lock); 84fa9e4066Sahrens vn_invalid(vp); 85fa9e4066Sahrens zfs_znode_free(zp); 86ea8dc4b6Seschrock } else { 87ea8dc4b6Seschrock /* signal force unmount that this znode can be freed */ 88ea8dc4b6Seschrock zp->z_dbuf = NULL; 89ea8dc4b6Seschrock mutex_exit(&zp->z_lock); 90fa9e4066Sahrens } 91fa9e4066Sahrens } 92fa9e4066Sahrens 93fa9e4066Sahrens /*ARGSUSED*/ 94fa9e4066Sahrens static int 95fa9e4066Sahrens zfs_znode_cache_constructor(void *buf, void *cdrarg, int kmflags) 96fa9e4066Sahrens { 97fa9e4066Sahrens znode_t *zp = buf; 98fa9e4066Sahrens 99fa9e4066Sahrens zp->z_vnode = vn_alloc(KM_SLEEP); 100fa9e4066Sahrens zp->z_vnode->v_data = (caddr_t)zp; 101fa9e4066Sahrens mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL); 102fa9e4066Sahrens rw_init(&zp->z_map_lock, NULL, RW_DEFAULT, NULL); 103104e2ed7Sperrin rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL); 104af2c4821Smaybee rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL); 105fa9e4066Sahrens mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL); 106104e2ed7Sperrin 107104e2ed7Sperrin mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL); 108104e2ed7Sperrin avl_create(&zp->z_range_avl, zfs_range_compare, 109104e2ed7Sperrin sizeof (rl_t), offsetof(rl_t, r_node)); 110104e2ed7Sperrin 111fa9e4066Sahrens zp->z_dbuf_held = 0; 112fa9e4066Sahrens zp->z_dirlocks = 0; 113fa9e4066Sahrens return (0); 114fa9e4066Sahrens } 115fa9e4066Sahrens 116fa9e4066Sahrens /*ARGSUSED*/ 117fa9e4066Sahrens static void 118fa9e4066Sahrens zfs_znode_cache_destructor(void *buf, void *cdarg) 119fa9e4066Sahrens { 120fa9e4066Sahrens znode_t *zp = buf; 121fa9e4066Sahrens 122fa9e4066Sahrens ASSERT(zp->z_dirlocks == 0); 123fa9e4066Sahrens mutex_destroy(&zp->z_lock); 124fa9e4066Sahrens rw_destroy(&zp->z_map_lock); 125104e2ed7Sperrin rw_destroy(&zp->z_parent_lock); 126af2c4821Smaybee rw_destroy(&zp->z_name_lock); 127fa9e4066Sahrens mutex_destroy(&zp->z_acl_lock); 128104e2ed7Sperrin avl_destroy(&zp->z_range_avl); 129c25056deSgw mutex_destroy(&zp->z_range_lock); 130fa9e4066Sahrens 131fa9e4066Sahrens ASSERT(zp->z_dbuf_held == 0); 132fa9e4066Sahrens ASSERT(ZTOV(zp)->v_count == 0); 133fa9e4066Sahrens vn_free(ZTOV(zp)); 134fa9e4066Sahrens } 135fa9e4066Sahrens 136fa9e4066Sahrens void 137fa9e4066Sahrens zfs_znode_init(void) 138fa9e4066Sahrens { 139fa9e4066Sahrens /* 140fa9e4066Sahrens * Initialize zcache 141fa9e4066Sahrens */ 142fa9e4066Sahrens ASSERT(znode_cache == NULL); 143fa9e4066Sahrens znode_cache = kmem_cache_create("zfs_znode_cache", 144fa9e4066Sahrens sizeof (znode_t), 0, zfs_znode_cache_constructor, 145fa9e4066Sahrens zfs_znode_cache_destructor, NULL, NULL, NULL, 0); 146fa9e4066Sahrens } 147fa9e4066Sahrens 148fa9e4066Sahrens void 149fa9e4066Sahrens zfs_znode_fini(void) 150fa9e4066Sahrens { 151fa9e4066Sahrens /* 152fa9e4066Sahrens * Cleanup vfs & vnode ops 153fa9e4066Sahrens */ 154fa9e4066Sahrens zfs_remove_op_tables(); 155fa9e4066Sahrens 156fa9e4066Sahrens /* 157fa9e4066Sahrens * Cleanup zcache 158fa9e4066Sahrens */ 159fa9e4066Sahrens if (znode_cache) 160fa9e4066Sahrens kmem_cache_destroy(znode_cache); 161fa9e4066Sahrens znode_cache = NULL; 162fa9e4066Sahrens } 163fa9e4066Sahrens 164fa9e4066Sahrens struct vnodeops *zfs_dvnodeops; 165fa9e4066Sahrens struct vnodeops *zfs_fvnodeops; 166fa9e4066Sahrens struct vnodeops *zfs_symvnodeops; 167fa9e4066Sahrens struct vnodeops *zfs_xdvnodeops; 168fa9e4066Sahrens struct vnodeops *zfs_evnodeops; 169fa9e4066Sahrens 170fa9e4066Sahrens void 171fa9e4066Sahrens zfs_remove_op_tables() 172fa9e4066Sahrens { 173fa9e4066Sahrens /* 174fa9e4066Sahrens * Remove vfs ops 175fa9e4066Sahrens */ 176fa9e4066Sahrens ASSERT(zfsfstype); 177fa9e4066Sahrens (void) vfs_freevfsops_by_type(zfsfstype); 178fa9e4066Sahrens zfsfstype = 0; 179fa9e4066Sahrens 180fa9e4066Sahrens /* 181fa9e4066Sahrens * Remove vnode ops 182fa9e4066Sahrens */ 183fa9e4066Sahrens if (zfs_dvnodeops) 184fa9e4066Sahrens vn_freevnodeops(zfs_dvnodeops); 185fa9e4066Sahrens if (zfs_fvnodeops) 186fa9e4066Sahrens vn_freevnodeops(zfs_fvnodeops); 187fa9e4066Sahrens if (zfs_symvnodeops) 188fa9e4066Sahrens vn_freevnodeops(zfs_symvnodeops); 189fa9e4066Sahrens if (zfs_xdvnodeops) 190fa9e4066Sahrens vn_freevnodeops(zfs_xdvnodeops); 191fa9e4066Sahrens if (zfs_evnodeops) 192fa9e4066Sahrens vn_freevnodeops(zfs_evnodeops); 193fa9e4066Sahrens 194fa9e4066Sahrens zfs_dvnodeops = NULL; 195fa9e4066Sahrens zfs_fvnodeops = NULL; 196fa9e4066Sahrens zfs_symvnodeops = NULL; 197fa9e4066Sahrens zfs_xdvnodeops = NULL; 198fa9e4066Sahrens zfs_evnodeops = NULL; 199fa9e4066Sahrens } 200fa9e4066Sahrens 201fa9e4066Sahrens extern const fs_operation_def_t zfs_dvnodeops_template[]; 202fa9e4066Sahrens extern const fs_operation_def_t zfs_fvnodeops_template[]; 203fa9e4066Sahrens extern const fs_operation_def_t zfs_xdvnodeops_template[]; 204fa9e4066Sahrens extern const fs_operation_def_t zfs_symvnodeops_template[]; 205fa9e4066Sahrens extern const fs_operation_def_t zfs_evnodeops_template[]; 206fa9e4066Sahrens 207fa9e4066Sahrens int 208fa9e4066Sahrens zfs_create_op_tables() 209fa9e4066Sahrens { 210fa9e4066Sahrens int error; 211fa9e4066Sahrens 212fa9e4066Sahrens /* 213fa9e4066Sahrens * zfs_dvnodeops can be set if mod_remove() calls mod_installfs() 214fa9e4066Sahrens * due to a failure to remove the the 2nd modlinkage (zfs_modldrv). 215fa9e4066Sahrens * In this case we just return as the ops vectors are already set up. 216fa9e4066Sahrens */ 217fa9e4066Sahrens if (zfs_dvnodeops) 218fa9e4066Sahrens return (0); 219fa9e4066Sahrens 220fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template, 221fa9e4066Sahrens &zfs_dvnodeops); 222fa9e4066Sahrens if (error) 223fa9e4066Sahrens return (error); 224fa9e4066Sahrens 225fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template, 226fa9e4066Sahrens &zfs_fvnodeops); 227fa9e4066Sahrens if (error) 228fa9e4066Sahrens return (error); 229fa9e4066Sahrens 230fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template, 231fa9e4066Sahrens &zfs_symvnodeops); 232fa9e4066Sahrens if (error) 233fa9e4066Sahrens return (error); 234fa9e4066Sahrens 235fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template, 236fa9e4066Sahrens &zfs_xdvnodeops); 237fa9e4066Sahrens if (error) 238fa9e4066Sahrens return (error); 239fa9e4066Sahrens 240fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template, 241fa9e4066Sahrens &zfs_evnodeops); 242fa9e4066Sahrens 243fa9e4066Sahrens return (error); 244fa9e4066Sahrens } 245fa9e4066Sahrens 246fa9e4066Sahrens /* 247fa9e4066Sahrens * zfs_init_fs - Initialize the zfsvfs struct and the file system 248fa9e4066Sahrens * incore "master" object. Verify version compatibility. 249fa9e4066Sahrens */ 250fa9e4066Sahrens int 251fa9e4066Sahrens zfs_init_fs(zfsvfs_t *zfsvfs, znode_t **zpp, cred_t *cr) 252fa9e4066Sahrens { 253fa9e4066Sahrens extern int zfsfstype; 254fa9e4066Sahrens 255fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 256fa9e4066Sahrens int i, error; 257fa9e4066Sahrens dmu_object_info_t doi; 258a2eea2e1Sahrens uint64_t fsid_guid; 259fa9e4066Sahrens 260fa9e4066Sahrens *zpp = NULL; 261fa9e4066Sahrens 262fa9e4066Sahrens /* 263fa9e4066Sahrens * XXX - hack to auto-create the pool root filesystem at 264fa9e4066Sahrens * the first attempted mount. 265fa9e4066Sahrens */ 266fa9e4066Sahrens if (dmu_object_info(os, MASTER_NODE_OBJ, &doi) == ENOENT) { 267fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(os); 268*da6c28aaSamw uint64_t zpl_version; 269fa9e4066Sahrens 270ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, TRUE, NULL); /* master */ 271ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, TRUE, NULL); /* del queue */ 272fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); /* root node */ 273fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 274fa9e4066Sahrens ASSERT3U(error, ==, 0); 275*da6c28aaSamw if (spa_version(dmu_objset_spa(os)) >= SPA_VERSION_FUID) 276*da6c28aaSamw zpl_version = ZPL_VERSION; 277*da6c28aaSamw else 278*da6c28aaSamw zpl_version = ZPL_VERSION_FUID - 1; 279*da6c28aaSamw zfs_create_fs(os, cr, zpl_version, 0, tx); 280fa9e4066Sahrens dmu_tx_commit(tx); 281fa9e4066Sahrens } 282fa9e4066Sahrens 283e7437265Sahrens error = zap_lookup(os, MASTER_NODE_OBJ, ZPL_VERSION_STR, 8, 1, 284e7437265Sahrens &zfsvfs->z_version); 285ea8dc4b6Seschrock if (error) { 286ea8dc4b6Seschrock return (error); 287e7437265Sahrens } else if (zfsvfs->z_version > ZPL_VERSION) { 288fa9e4066Sahrens (void) printf("Mismatched versions: File system " 289fa9e4066Sahrens "is version %lld on-disk format, which is " 290fa9e4066Sahrens "incompatible with this software version %lld!", 291e7437265Sahrens (u_longlong_t)zfsvfs->z_version, ZPL_VERSION); 292fa9e4066Sahrens return (ENOTSUP); 293fa9e4066Sahrens } 294fa9e4066Sahrens 295fa9e4066Sahrens /* 296fa9e4066Sahrens * The fsid is 64 bits, composed of an 8-bit fs type, which 297fa9e4066Sahrens * separates our fsid from any other filesystem types, and a 298fa9e4066Sahrens * 56-bit objset unique ID. The objset unique ID is unique to 299fa9e4066Sahrens * all objsets open on this system, provided by unique_create(). 300fa9e4066Sahrens * The 8-bit fs type must be put in the low bits of fsid[1] 301fa9e4066Sahrens * because that's where other Solaris filesystems put it. 302fa9e4066Sahrens */ 303a2eea2e1Sahrens fsid_guid = dmu_objset_fsid_guid(os); 304a2eea2e1Sahrens ASSERT((fsid_guid & ~((1ULL<<56)-1)) == 0); 305a2eea2e1Sahrens zfsvfs->z_vfs->vfs_fsid.val[0] = fsid_guid; 306a2eea2e1Sahrens zfsvfs->z_vfs->vfs_fsid.val[1] = ((fsid_guid>>32) << 8) | 307fa9e4066Sahrens zfsfstype & 0xFF; 308fa9e4066Sahrens 309893a6d32Sahrens error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, 310893a6d32Sahrens &zfsvfs->z_root); 311ea8dc4b6Seschrock if (error) 312ea8dc4b6Seschrock return (error); 313893a6d32Sahrens ASSERT(zfsvfs->z_root != 0); 314fa9e4066Sahrens 315c25056deSgw error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1, 316c25056deSgw &zfsvfs->z_unlinkedobj); 317c25056deSgw if (error) 318c25056deSgw return (error); 319c25056deSgw 320fa9e4066Sahrens /* 321fa9e4066Sahrens * Initialize zget mutex's 322fa9e4066Sahrens */ 323fa9e4066Sahrens for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 324fa9e4066Sahrens mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); 325fa9e4066Sahrens 326893a6d32Sahrens error = zfs_zget(zfsvfs, zfsvfs->z_root, zpp); 327c25056deSgw if (error) { 328c25056deSgw /* 329c25056deSgw * On error, we destroy the mutexes here since it's not 330c25056deSgw * possible for the caller to determine if the mutexes were 331c25056deSgw * initialized properly. 332c25056deSgw */ 333c25056deSgw for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 334c25056deSgw mutex_destroy(&zfsvfs->z_hold_mtx[i]); 335fa9e4066Sahrens return (error); 336c25056deSgw } 337893a6d32Sahrens ASSERT3U((*zpp)->z_id, ==, zfsvfs->z_root); 338*da6c28aaSamw error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1, 339*da6c28aaSamw &zfsvfs->z_fuid_obj); 340*da6c28aaSamw if (error == ENOENT) 341*da6c28aaSamw error = 0; 342*da6c28aaSamw 343fa9e4066Sahrens return (0); 344fa9e4066Sahrens } 345fa9e4066Sahrens 34672fc53bcSmarks /* 34772fc53bcSmarks * define a couple of values we need available 34872fc53bcSmarks * for both 64 and 32 bit environments. 34972fc53bcSmarks */ 35072fc53bcSmarks #ifndef NBITSMINOR64 35172fc53bcSmarks #define NBITSMINOR64 32 35272fc53bcSmarks #endif 35372fc53bcSmarks #ifndef MAXMAJ64 35472fc53bcSmarks #define MAXMAJ64 0xffffffffUL 35572fc53bcSmarks #endif 35672fc53bcSmarks #ifndef MAXMIN64 35772fc53bcSmarks #define MAXMIN64 0xffffffffUL 35872fc53bcSmarks #endif 35972fc53bcSmarks 36072fc53bcSmarks /* 36172fc53bcSmarks * Create special expldev for ZFS private use. 36272fc53bcSmarks * Can't use standard expldev since it doesn't do 36372fc53bcSmarks * what we want. The standard expldev() takes a 36472fc53bcSmarks * dev32_t in LP64 and expands it to a long dev_t. 36572fc53bcSmarks * We need an interface that takes a dev32_t in ILP32 36672fc53bcSmarks * and expands it to a long dev_t. 36772fc53bcSmarks */ 36872fc53bcSmarks static uint64_t 36972fc53bcSmarks zfs_expldev(dev_t dev) 37072fc53bcSmarks { 37172fc53bcSmarks #ifndef _LP64 37272fc53bcSmarks major_t major = (major_t)dev >> NBITSMINOR32 & MAXMAJ32; 37372fc53bcSmarks return (((uint64_t)major << NBITSMINOR64) | 37472fc53bcSmarks ((minor_t)dev & MAXMIN32)); 37572fc53bcSmarks #else 37672fc53bcSmarks return (dev); 37772fc53bcSmarks #endif 37872fc53bcSmarks } 37972fc53bcSmarks 38072fc53bcSmarks /* 38172fc53bcSmarks * Special cmpldev for ZFS private use. 38272fc53bcSmarks * Can't use standard cmpldev since it takes 38372fc53bcSmarks * a long dev_t and compresses it to dev32_t in 38472fc53bcSmarks * LP64. We need to do a compaction of a long dev_t 38572fc53bcSmarks * to a dev32_t in ILP32. 38672fc53bcSmarks */ 38772fc53bcSmarks dev_t 38872fc53bcSmarks zfs_cmpldev(uint64_t dev) 38972fc53bcSmarks { 39072fc53bcSmarks #ifndef _LP64 39172fc53bcSmarks minor_t minor = (minor_t)dev & MAXMIN64; 39272fc53bcSmarks major_t major = (major_t)(dev >> NBITSMINOR64) & MAXMAJ64; 39372fc53bcSmarks 39472fc53bcSmarks if (major > MAXMAJ32 || minor > MAXMIN32) 39572fc53bcSmarks return (NODEV32); 39672fc53bcSmarks 39772fc53bcSmarks return (((dev32_t)major << NBITSMINOR32) | minor); 39872fc53bcSmarks #else 39972fc53bcSmarks return (dev); 40072fc53bcSmarks #endif 40172fc53bcSmarks } 40272fc53bcSmarks 403fa9e4066Sahrens /* 404fa9e4066Sahrens * Construct a new znode/vnode and intialize. 405fa9e4066Sahrens * 406fa9e4066Sahrens * This does not do a call to dmu_set_user() that is 407fa9e4066Sahrens * up to the caller to do, in case you don't want to 408fa9e4066Sahrens * return the znode 409fa9e4066Sahrens */ 410ea8dc4b6Seschrock static znode_t * 411fa9e4066Sahrens zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, uint64_t obj_num, int blksz) 412fa9e4066Sahrens { 413fa9e4066Sahrens znode_t *zp; 414fa9e4066Sahrens vnode_t *vp; 415fa9e4066Sahrens 416fa9e4066Sahrens zp = kmem_cache_alloc(znode_cache, KM_SLEEP); 417fa9e4066Sahrens 418fa9e4066Sahrens ASSERT(zp->z_dirlocks == NULL); 419fa9e4066Sahrens 420fa9e4066Sahrens zp->z_phys = db->db_data; 421fa9e4066Sahrens zp->z_zfsvfs = zfsvfs; 422893a6d32Sahrens zp->z_unlinked = 0; 423fa9e4066Sahrens zp->z_atime_dirty = 0; 424fa9e4066Sahrens zp->z_dbuf_held = 0; 425fa9e4066Sahrens zp->z_mapcnt = 0; 426fa9e4066Sahrens zp->z_last_itx = 0; 427fa9e4066Sahrens zp->z_dbuf = db; 428fa9e4066Sahrens zp->z_id = obj_num; 429fa9e4066Sahrens zp->z_blksz = blksz; 430fa9e4066Sahrens zp->z_seq = 0x7A4653; 43167bd71c6Sperrin zp->z_sync_cnt = 0; 432f18faf3fSek zp->z_gen = zp->z_phys->zp_gen; 433fa9e4066Sahrens 434fa9e4066Sahrens mutex_enter(&zfsvfs->z_znodes_lock); 435fa9e4066Sahrens list_insert_tail(&zfsvfs->z_all_znodes, zp); 436fa9e4066Sahrens mutex_exit(&zfsvfs->z_znodes_lock); 437fa9e4066Sahrens 438fa9e4066Sahrens vp = ZTOV(zp); 439fa9e4066Sahrens vn_reinit(vp); 440fa9e4066Sahrens 441fa9e4066Sahrens vp->v_vfsp = zfsvfs->z_parent->z_vfs; 442fa9e4066Sahrens vp->v_type = IFTOVT((mode_t)zp->z_phys->zp_mode); 443fa9e4066Sahrens 444fa9e4066Sahrens switch (vp->v_type) { 445fa9e4066Sahrens case VDIR: 446fa9e4066Sahrens if (zp->z_phys->zp_flags & ZFS_XATTR) { 447fa9e4066Sahrens vn_setops(vp, zfs_xdvnodeops); 448fa9e4066Sahrens vp->v_flag |= V_XATTRDIR; 449fa9e4066Sahrens } else 450fa9e4066Sahrens vn_setops(vp, zfs_dvnodeops); 4517f6e3e7dSperrin zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */ 452fa9e4066Sahrens break; 453fa9e4066Sahrens case VBLK: 454fa9e4066Sahrens case VCHR: 45572fc53bcSmarks vp->v_rdev = zfs_cmpldev(zp->z_phys->zp_rdev); 456fa9e4066Sahrens /*FALLTHROUGH*/ 457fa9e4066Sahrens case VFIFO: 458fa9e4066Sahrens case VSOCK: 459fa9e4066Sahrens case VDOOR: 460fa9e4066Sahrens vn_setops(vp, zfs_fvnodeops); 461fa9e4066Sahrens break; 462fa9e4066Sahrens case VREG: 463fa9e4066Sahrens vp->v_flag |= VMODSORT; 464fa9e4066Sahrens vn_setops(vp, zfs_fvnodeops); 465fa9e4066Sahrens break; 466fa9e4066Sahrens case VLNK: 467fa9e4066Sahrens vn_setops(vp, zfs_symvnodeops); 468fa9e4066Sahrens break; 469fa9e4066Sahrens default: 470fa9e4066Sahrens vn_setops(vp, zfs_evnodeops); 471fa9e4066Sahrens break; 472fa9e4066Sahrens } 473fa9e4066Sahrens 474fa9e4066Sahrens return (zp); 475fa9e4066Sahrens } 476fa9e4066Sahrens 477fa9e4066Sahrens static void 478fa9e4066Sahrens zfs_znode_dmu_init(znode_t *zp) 479fa9e4066Sahrens { 480fa9e4066Sahrens znode_t *nzp; 481fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 482fa9e4066Sahrens dmu_buf_t *db = zp->z_dbuf; 483fa9e4066Sahrens 484fa9e4066Sahrens mutex_enter(&zp->z_lock); 485fa9e4066Sahrens 4868cb045d0Sek nzp = dmu_buf_set_user_ie(db, zp, &zp->z_phys, znode_pageout_func); 487fa9e4066Sahrens 488fa9e4066Sahrens /* 489fa9e4066Sahrens * there should be no 490fa9e4066Sahrens * concurrent zgets on this object. 491fa9e4066Sahrens */ 492fa9e4066Sahrens ASSERT3P(nzp, ==, NULL); 493fa9e4066Sahrens 494fa9e4066Sahrens /* 495fa9e4066Sahrens * Slap on VROOT if we are the root znode 496fa9e4066Sahrens */ 497fa9e4066Sahrens if (zp->z_id == zfsvfs->z_root) { 498fa9e4066Sahrens ZTOV(zp)->v_flag |= VROOT; 499fa9e4066Sahrens } 500fa9e4066Sahrens 501fa9e4066Sahrens ASSERT(zp->z_dbuf_held == 0); 502fa9e4066Sahrens zp->z_dbuf_held = 1; 503fa9e4066Sahrens VFS_HOLD(zfsvfs->z_vfs); 504fa9e4066Sahrens mutex_exit(&zp->z_lock); 505fa9e4066Sahrens vn_exists(ZTOV(zp)); 506fa9e4066Sahrens } 507fa9e4066Sahrens 508fa9e4066Sahrens /* 509fa9e4066Sahrens * Create a new DMU object to hold a zfs znode. 510fa9e4066Sahrens * 511fa9e4066Sahrens * IN: dzp - parent directory for new znode 512fa9e4066Sahrens * vap - file attributes for new znode 513fa9e4066Sahrens * tx - dmu transaction id for zap operations 514fa9e4066Sahrens * cr - credentials of caller 515fa9e4066Sahrens * flag - flags: 516fa9e4066Sahrens * IS_ROOT_NODE - new object will be root 517fa9e4066Sahrens * IS_XATTR - new object is an attribute 518fa9e4066Sahrens * IS_REPLAY - intent log replay 519*da6c28aaSamw * bonuslen - length of bonus buffer 520*da6c28aaSamw * setaclp - File/Dir initial ACL 521*da6c28aaSamw * fuidp - Tracks fuid allocation. 522fa9e4066Sahrens * 523fa9e4066Sahrens * OUT: oid - ID of created object 524*da6c28aaSamw * zpp - allocated znode 525fa9e4066Sahrens * 526fa9e4066Sahrens */ 527fa9e4066Sahrens void 528fa9e4066Sahrens zfs_mknode(znode_t *dzp, vattr_t *vap, uint64_t *oid, dmu_tx_t *tx, cred_t *cr, 529*da6c28aaSamw uint_t flag, znode_t **zpp, int bonuslen, zfs_acl_t *setaclp, 530*da6c28aaSamw zfs_fuid_info_t **fuidp) 531fa9e4066Sahrens { 532fa9e4066Sahrens dmu_buf_t *dbp; 533fa9e4066Sahrens znode_phys_t *pzp; 534fa9e4066Sahrens znode_t *zp; 535fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 536fa9e4066Sahrens timestruc_t now; 537fa9e4066Sahrens uint64_t gen; 538fa9e4066Sahrens int err; 539fa9e4066Sahrens 540fa9e4066Sahrens ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE)); 541fa9e4066Sahrens 542fa9e4066Sahrens if (zfsvfs->z_assign >= TXG_INITIAL) { /* ZIL replay */ 543fa9e4066Sahrens *oid = vap->va_nodeid; 544fa9e4066Sahrens flag |= IS_REPLAY; 545fa9e4066Sahrens now = vap->va_ctime; /* see zfs_replay_create() */ 546fa9e4066Sahrens gen = vap->va_nblocks; /* ditto */ 547fa9e4066Sahrens } else { 548fa9e4066Sahrens *oid = 0; 549fa9e4066Sahrens gethrestime(&now); 550fa9e4066Sahrens gen = dmu_tx_get_txg(tx); 551fa9e4066Sahrens } 552fa9e4066Sahrens 553fa9e4066Sahrens /* 554fa9e4066Sahrens * Create a new DMU object. 555fa9e4066Sahrens */ 556ea8dc4b6Seschrock /* 557ea8dc4b6Seschrock * There's currently no mechanism for pre-reading the blocks that will 558ea8dc4b6Seschrock * be to needed allocate a new object, so we accept the small chance 559ea8dc4b6Seschrock * that there will be an i/o error and we will fail one of the 560ea8dc4b6Seschrock * assertions below. 561ea8dc4b6Seschrock */ 562fa9e4066Sahrens if (vap->va_type == VDIR) { 563fa9e4066Sahrens if (flag & IS_REPLAY) { 564*da6c28aaSamw err = zap_create_claim_norm(zfsvfs->z_os, *oid, 565*da6c28aaSamw zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS, 566fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 567fa9e4066Sahrens ASSERT3U(err, ==, 0); 568fa9e4066Sahrens } else { 569*da6c28aaSamw *oid = zap_create_norm(zfsvfs->z_os, 570*da6c28aaSamw zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS, 571fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 572fa9e4066Sahrens } 573fa9e4066Sahrens } else { 574fa9e4066Sahrens if (flag & IS_REPLAY) { 575fa9e4066Sahrens err = dmu_object_claim(zfsvfs->z_os, *oid, 576fa9e4066Sahrens DMU_OT_PLAIN_FILE_CONTENTS, 0, 577fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 578fa9e4066Sahrens ASSERT3U(err, ==, 0); 579fa9e4066Sahrens } else { 580fa9e4066Sahrens *oid = dmu_object_alloc(zfsvfs->z_os, 581fa9e4066Sahrens DMU_OT_PLAIN_FILE_CONTENTS, 0, 582fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 583fa9e4066Sahrens } 584fa9e4066Sahrens } 585ea8dc4b6Seschrock VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, *oid, NULL, &dbp)); 586fa9e4066Sahrens dmu_buf_will_dirty(dbp, tx); 587fa9e4066Sahrens 588fa9e4066Sahrens /* 589fa9e4066Sahrens * Initialize the znode physical data to zero. 590fa9e4066Sahrens */ 591fa9e4066Sahrens ASSERT(dbp->db_size >= sizeof (znode_phys_t)); 592fa9e4066Sahrens bzero(dbp->db_data, dbp->db_size); 593fa9e4066Sahrens pzp = dbp->db_data; 594fa9e4066Sahrens 595fa9e4066Sahrens /* 596fa9e4066Sahrens * If this is the root, fix up the half-initialized parent pointer 597fa9e4066Sahrens * to reference the just-allocated physical data area. 598fa9e4066Sahrens */ 599fa9e4066Sahrens if (flag & IS_ROOT_NODE) { 600fa9e4066Sahrens dzp->z_phys = pzp; 601fa9e4066Sahrens dzp->z_id = *oid; 602fa9e4066Sahrens } 603fa9e4066Sahrens 604fa9e4066Sahrens /* 605fa9e4066Sahrens * If parent is an xattr, so am I. 606fa9e4066Sahrens */ 607fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) 608fa9e4066Sahrens flag |= IS_XATTR; 609fa9e4066Sahrens 610fa9e4066Sahrens if (vap->va_type == VBLK || vap->va_type == VCHR) { 61172fc53bcSmarks pzp->zp_rdev = zfs_expldev(vap->va_rdev); 612fa9e4066Sahrens } 613fa9e4066Sahrens 614*da6c28aaSamw if (zfsvfs->z_use_fuids) 615*da6c28aaSamw pzp->zp_flags = ZFS_ARCHIVE | ZFS_AV_MODIFIED; 616*da6c28aaSamw 617fa9e4066Sahrens if (vap->va_type == VDIR) { 618fa9e4066Sahrens pzp->zp_size = 2; /* contents ("." and "..") */ 619fa9e4066Sahrens pzp->zp_links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1; 620fa9e4066Sahrens } 621fa9e4066Sahrens 622fa9e4066Sahrens pzp->zp_parent = dzp->z_id; 623fa9e4066Sahrens if (flag & IS_XATTR) 624fa9e4066Sahrens pzp->zp_flags |= ZFS_XATTR; 625fa9e4066Sahrens 626fa9e4066Sahrens pzp->zp_gen = gen; 627fa9e4066Sahrens 628fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_crtime); 629fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_ctime); 630fa9e4066Sahrens 631fa9e4066Sahrens if (vap->va_mask & AT_ATIME) { 632fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 633fa9e4066Sahrens } else { 634fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_atime); 635fa9e4066Sahrens } 636fa9e4066Sahrens 637fa9e4066Sahrens if (vap->va_mask & AT_MTIME) { 638fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 639fa9e4066Sahrens } else { 640fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_mtime); 641fa9e4066Sahrens } 642fa9e4066Sahrens 643fa9e4066Sahrens pzp->zp_mode = MAKEIMODE(vap->va_type, vap->va_mode); 644fa9e4066Sahrens zp = zfs_znode_alloc(zfsvfs, dbp, *oid, 0); 645fa9e4066Sahrens 646*da6c28aaSamw zfs_perm_init(zp, dzp, flag, vap, tx, cr, setaclp, fuidp); 647fa9e4066Sahrens 648fa9e4066Sahrens if (zpp) { 649fa9e4066Sahrens kmutex_t *hash_mtx = ZFS_OBJ_MUTEX(zp); 650fa9e4066Sahrens 651fa9e4066Sahrens mutex_enter(hash_mtx); 652fa9e4066Sahrens zfs_znode_dmu_init(zp); 653ea8dc4b6Seschrock mutex_exit(hash_mtx); 654ea8dc4b6Seschrock 655fa9e4066Sahrens *zpp = zp; 656fa9e4066Sahrens } else { 657fa9e4066Sahrens ZTOV(zp)->v_count = 0; 658ea8dc4b6Seschrock dmu_buf_rele(dbp, NULL); 659fa9e4066Sahrens zfs_znode_free(zp); 660fa9e4066Sahrens } 661fa9e4066Sahrens } 662fa9e4066Sahrens 663*da6c28aaSamw void 664*da6c28aaSamw zfs_xvattr_set(znode_t *zp, xvattr_t *xvap) 665*da6c28aaSamw { 666*da6c28aaSamw xoptattr_t *xoap; 667*da6c28aaSamw 668*da6c28aaSamw xoap = xva_getxoptattr(xvap); 669*da6c28aaSamw ASSERT(xoap); 670*da6c28aaSamw 671*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { 672*da6c28aaSamw ZFS_TIME_ENCODE(&xoap->xoa_createtime, zp->z_phys->zp_crtime); 673*da6c28aaSamw XVA_SET_RTN(xvap, XAT_CREATETIME); 674*da6c28aaSamw } 675*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { 676*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_READONLY, xoap->xoa_readonly); 677*da6c28aaSamw XVA_SET_RTN(xvap, XAT_READONLY); 678*da6c28aaSamw } 679*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { 680*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_HIDDEN, xoap->xoa_hidden); 681*da6c28aaSamw XVA_SET_RTN(xvap, XAT_HIDDEN); 682*da6c28aaSamw } 683*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { 684*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_SYSTEM, xoap->xoa_system); 685*da6c28aaSamw XVA_SET_RTN(xvap, XAT_SYSTEM); 686*da6c28aaSamw } 687*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { 688*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_ARCHIVE, xoap->xoa_archive); 689*da6c28aaSamw XVA_SET_RTN(xvap, XAT_ARCHIVE); 690*da6c28aaSamw } 691*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 692*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_IMMUTABLE, xoap->xoa_immutable); 693*da6c28aaSamw XVA_SET_RTN(xvap, XAT_IMMUTABLE); 694*da6c28aaSamw } 695*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 696*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_NOUNLINK, xoap->xoa_nounlink); 697*da6c28aaSamw XVA_SET_RTN(xvap, XAT_NOUNLINK); 698*da6c28aaSamw } 699*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 700*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_APPENDONLY, xoap->xoa_appendonly); 701*da6c28aaSamw XVA_SET_RTN(xvap, XAT_APPENDONLY); 702*da6c28aaSamw } 703*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 704*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_NODUMP, xoap->xoa_nodump); 705*da6c28aaSamw XVA_SET_RTN(xvap, XAT_NODUMP); 706*da6c28aaSamw } 707*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { 708*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_OPAQUE, xoap->xoa_opaque); 709*da6c28aaSamw XVA_SET_RTN(xvap, XAT_OPAQUE); 710*da6c28aaSamw } 711*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 712*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_AV_QUARANTINED, 713*da6c28aaSamw xoap->xoa_av_quarantined); 714*da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); 715*da6c28aaSamw } 716*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 717*da6c28aaSamw ZFS_ATTR_SET(zp, ZFS_AV_MODIFIED, xoap->xoa_av_modified); 718*da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_MODIFIED); 719*da6c28aaSamw } 720*da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) { 721*da6c28aaSamw (void) memcpy(zp->z_phys + 1, xoap->xoa_av_scanstamp, 722*da6c28aaSamw sizeof (xoap->xoa_av_scanstamp)); 723*da6c28aaSamw zp->z_phys->zp_flags |= ZFS_BONUS_SCANSTAMP; 724*da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); 725*da6c28aaSamw } 726*da6c28aaSamw } 727*da6c28aaSamw 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 ASSERT(db->db_object == obj_num); 755fa9e4066Sahrens ASSERT(db->db_offset == -1); 756fa9e4066Sahrens ASSERT(db->db_data != NULL); 757fa9e4066Sahrens 758fa9e4066Sahrens zp = dmu_buf_get_user(db); 759fa9e4066Sahrens 760fa9e4066Sahrens if (zp != NULL) { 761fa9e4066Sahrens mutex_enter(&zp->z_lock); 762fa9e4066Sahrens 763fa9e4066Sahrens ASSERT3U(zp->z_id, ==, obj_num); 764893a6d32Sahrens if (zp->z_unlinked) { 765ea8dc4b6Seschrock dmu_buf_rele(db, NULL); 766fa9e4066Sahrens mutex_exit(&zp->z_lock); 767fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 768fa9e4066Sahrens return (ENOENT); 769fa9e4066Sahrens } else if (zp->z_dbuf_held) { 770ea8dc4b6Seschrock dmu_buf_rele(db, NULL); 771fa9e4066Sahrens } else { 772fa9e4066Sahrens zp->z_dbuf_held = 1; 773fa9e4066Sahrens VFS_HOLD(zfsvfs->z_vfs); 774fa9e4066Sahrens } 775fa9e4066Sahrens 776ea8dc4b6Seschrock 777fa9e4066Sahrens VN_HOLD(ZTOV(zp)); 778fa9e4066Sahrens mutex_exit(&zp->z_lock); 779ea8dc4b6Seschrock ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 780fa9e4066Sahrens *zpp = zp; 781fa9e4066Sahrens return (0); 782fa9e4066Sahrens } 783fa9e4066Sahrens 784fa9e4066Sahrens /* 785fa9e4066Sahrens * Not found create new znode/vnode 786fa9e4066Sahrens */ 787fa9e4066Sahrens zp = zfs_znode_alloc(zfsvfs, db, obj_num, doi.doi_data_block_size); 788fa9e4066Sahrens ASSERT3U(zp->z_id, ==, obj_num); 789fa9e4066Sahrens zfs_znode_dmu_init(zp); 790ea8dc4b6Seschrock ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 791fa9e4066Sahrens *zpp = zp; 792fa9e4066Sahrens return (0); 793fa9e4066Sahrens } 794fa9e4066Sahrens 795f18faf3fSek int 796f18faf3fSek zfs_rezget(znode_t *zp) 797f18faf3fSek { 798f18faf3fSek zfsvfs_t *zfsvfs = zp->z_zfsvfs; 799f18faf3fSek dmu_object_info_t doi; 800f18faf3fSek dmu_buf_t *db; 801f18faf3fSek uint64_t obj_num = zp->z_id; 802f18faf3fSek int err; 803f18faf3fSek 804f18faf3fSek ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num); 805f18faf3fSek 806f18faf3fSek err = dmu_bonus_hold(zfsvfs->z_os, obj_num, NULL, &db); 807f18faf3fSek if (err) { 808f18faf3fSek ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 809f18faf3fSek return (err); 810f18faf3fSek } 811f18faf3fSek 812f18faf3fSek dmu_object_info_from_db(db, &doi); 813f18faf3fSek if (doi.doi_bonus_type != DMU_OT_ZNODE || 814f18faf3fSek doi.doi_bonus_size < sizeof (znode_phys_t)) { 815f18faf3fSek dmu_buf_rele(db, NULL); 816f18faf3fSek ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 817f18faf3fSek return (EINVAL); 818f18faf3fSek } 819f18faf3fSek 820f18faf3fSek ASSERT(db->db_object == obj_num); 821f18faf3fSek ASSERT(db->db_offset == -1); 822f18faf3fSek ASSERT(db->db_data != NULL); 823f18faf3fSek 824f18faf3fSek if (((znode_phys_t *)db->db_data)->zp_gen != zp->z_gen) { 825f18faf3fSek dmu_buf_rele(db, NULL); 826f18faf3fSek ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 827f18faf3fSek return (EIO); 828f18faf3fSek } 829f18faf3fSek 830f18faf3fSek zp->z_dbuf = db; 831f18faf3fSek zp->z_phys = db->db_data; 832f18faf3fSek zfs_znode_dmu_init(zp); 833f18faf3fSek zp->z_unlinked = (zp->z_phys->zp_links == 0); 834f18faf3fSek 835f18faf3fSek /* release the hold from zfs_znode_dmu_init() */ 836f18faf3fSek VFS_RELE(zfsvfs->z_vfs); 837f18faf3fSek ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 838f18faf3fSek 839f18faf3fSek return (0); 840f18faf3fSek } 841f18faf3fSek 842fa9e4066Sahrens void 843fa9e4066Sahrens zfs_znode_delete(znode_t *zp, dmu_tx_t *tx) 844fa9e4066Sahrens { 845fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 846fa9e4066Sahrens int error; 847fa9e4066Sahrens 848fa9e4066Sahrens ZFS_OBJ_HOLD_ENTER(zfsvfs, zp->z_id); 849fa9e4066Sahrens if (zp->z_phys->zp_acl.z_acl_extern_obj) { 850fa9e4066Sahrens error = dmu_object_free(zfsvfs->z_os, 851fa9e4066Sahrens zp->z_phys->zp_acl.z_acl_extern_obj, tx); 852fa9e4066Sahrens ASSERT3U(error, ==, 0); 853fa9e4066Sahrens } 854fa9e4066Sahrens error = dmu_object_free(zfsvfs->z_os, zp->z_id, tx); 855fa9e4066Sahrens ASSERT3U(error, ==, 0); 856fa9e4066Sahrens zp->z_dbuf_held = 0; 857fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, zp->z_id); 858ea8dc4b6Seschrock dmu_buf_rele(zp->z_dbuf, NULL); 859fa9e4066Sahrens } 860fa9e4066Sahrens 861fa9e4066Sahrens void 862fa9e4066Sahrens zfs_zinactive(znode_t *zp) 863fa9e4066Sahrens { 864fa9e4066Sahrens vnode_t *vp = ZTOV(zp); 865fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 866fa9e4066Sahrens uint64_t z_id = zp->z_id; 867fa9e4066Sahrens 868fa9e4066Sahrens ASSERT(zp->z_dbuf_held && zp->z_phys); 869fa9e4066Sahrens 870fa9e4066Sahrens /* 871fa9e4066Sahrens * Don't allow a zfs_zget() while were trying to release this znode 872fa9e4066Sahrens */ 873fa9e4066Sahrens ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id); 874fa9e4066Sahrens 875fa9e4066Sahrens mutex_enter(&zp->z_lock); 876fa9e4066Sahrens mutex_enter(&vp->v_lock); 877fa9e4066Sahrens vp->v_count--; 878fa9e4066Sahrens if (vp->v_count > 0 || vn_has_cached_data(vp)) { 879fa9e4066Sahrens /* 880fa9e4066Sahrens * If the hold count is greater than zero, somebody has 881fa9e4066Sahrens * obtained a new reference on this znode while we were 882fa9e4066Sahrens * processing it here, so we are done. If we still have 883fa9e4066Sahrens * mapped pages then we are also done, since we don't 884fa9e4066Sahrens * want to inactivate the znode until the pages get pushed. 885fa9e4066Sahrens * 886fa9e4066Sahrens * XXX - if vn_has_cached_data(vp) is true, but count == 0, 887fa9e4066Sahrens * this seems like it would leave the znode hanging with 888fa9e4066Sahrens * no chance to go inactive... 889fa9e4066Sahrens */ 890fa9e4066Sahrens mutex_exit(&vp->v_lock); 891fa9e4066Sahrens mutex_exit(&zp->z_lock); 892fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); 893fa9e4066Sahrens return; 894fa9e4066Sahrens } 895fa9e4066Sahrens mutex_exit(&vp->v_lock); 896fa9e4066Sahrens 897fa9e4066Sahrens /* 898fa9e4066Sahrens * If this was the last reference to a file with no links, 899fa9e4066Sahrens * remove the file from the file system. 900fa9e4066Sahrens */ 901893a6d32Sahrens if (zp->z_unlinked) { 902fa9e4066Sahrens mutex_exit(&zp->z_lock); 903fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); 904893a6d32Sahrens zfs_rmnode(zp); 905fa9e4066Sahrens VFS_RELE(zfsvfs->z_vfs); 906fa9e4066Sahrens return; 907fa9e4066Sahrens } 908ea8dc4b6Seschrock ASSERT(zp->z_phys); 909ea8dc4b6Seschrock ASSERT(zp->z_dbuf_held); 910fa9e4066Sahrens 911ea8dc4b6Seschrock zp->z_dbuf_held = 0; 912fa9e4066Sahrens mutex_exit(&zp->z_lock); 913ea8dc4b6Seschrock dmu_buf_rele(zp->z_dbuf, NULL); 914fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); 915ea8dc4b6Seschrock VFS_RELE(zfsvfs->z_vfs); 916fa9e4066Sahrens } 917fa9e4066Sahrens 918fa9e4066Sahrens void 919fa9e4066Sahrens zfs_znode_free(znode_t *zp) 920fa9e4066Sahrens { 921fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 922fa9e4066Sahrens 923fa9e4066Sahrens mutex_enter(&zfsvfs->z_znodes_lock); 924fa9e4066Sahrens list_remove(&zfsvfs->z_all_znodes, zp); 925fa9e4066Sahrens mutex_exit(&zfsvfs->z_znodes_lock); 926fa9e4066Sahrens 927fa9e4066Sahrens kmem_cache_free(znode_cache, zp); 928fa9e4066Sahrens } 929fa9e4066Sahrens 930fa9e4066Sahrens void 931fa9e4066Sahrens zfs_time_stamper_locked(znode_t *zp, uint_t flag, dmu_tx_t *tx) 932fa9e4066Sahrens { 933fa9e4066Sahrens timestruc_t now; 934fa9e4066Sahrens 935fa9e4066Sahrens ASSERT(MUTEX_HELD(&zp->z_lock)); 936fa9e4066Sahrens 937fa9e4066Sahrens gethrestime(&now); 938fa9e4066Sahrens 939fa9e4066Sahrens if (tx) { 940fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 941fa9e4066Sahrens zp->z_atime_dirty = 0; 942fa9e4066Sahrens zp->z_seq++; 943fa9e4066Sahrens } else { 944fa9e4066Sahrens zp->z_atime_dirty = 1; 945fa9e4066Sahrens } 946fa9e4066Sahrens 947fa9e4066Sahrens if (flag & AT_ATIME) 948fa9e4066Sahrens ZFS_TIME_ENCODE(&now, zp->z_phys->zp_atime); 949fa9e4066Sahrens 950*da6c28aaSamw if (flag & AT_MTIME) { 951fa9e4066Sahrens ZFS_TIME_ENCODE(&now, zp->z_phys->zp_mtime); 952*da6c28aaSamw if (zp->z_zfsvfs->z_use_fuids) 953*da6c28aaSamw zp->z_phys->zp_flags |= (ZFS_ARCHIVE | ZFS_AV_MODIFIED); 954*da6c28aaSamw } 955fa9e4066Sahrens 956*da6c28aaSamw if (flag & AT_CTIME) { 957fa9e4066Sahrens ZFS_TIME_ENCODE(&now, zp->z_phys->zp_ctime); 958*da6c28aaSamw if (zp->z_zfsvfs->z_use_fuids) 959*da6c28aaSamw zp->z_phys->zp_flags |= ZFS_ARCHIVE; 960*da6c28aaSamw } 961fa9e4066Sahrens } 962fa9e4066Sahrens 963fa9e4066Sahrens /* 964fa9e4066Sahrens * Update the requested znode timestamps with the current time. 965fa9e4066Sahrens * If we are in a transaction, then go ahead and mark the znode 966fa9e4066Sahrens * dirty in the transaction so the timestamps will go to disk. 967fa9e4066Sahrens * Otherwise, we will get pushed next time the znode is updated 968fa9e4066Sahrens * in a transaction, or when this znode eventually goes inactive. 969fa9e4066Sahrens * 970fa9e4066Sahrens * Why is this OK? 971fa9e4066Sahrens * 1 - Only the ACCESS time is ever updated outside of a transaction. 972fa9e4066Sahrens * 2 - Multiple consecutive updates will be collapsed into a single 973fa9e4066Sahrens * znode update by the transaction grouping semantics of the DMU. 974fa9e4066Sahrens */ 975fa9e4066Sahrens void 976fa9e4066Sahrens zfs_time_stamper(znode_t *zp, uint_t flag, dmu_tx_t *tx) 977fa9e4066Sahrens { 978fa9e4066Sahrens mutex_enter(&zp->z_lock); 979fa9e4066Sahrens zfs_time_stamper_locked(zp, flag, tx); 980fa9e4066Sahrens mutex_exit(&zp->z_lock); 981fa9e4066Sahrens } 982fa9e4066Sahrens 983fa9e4066Sahrens /* 984104e2ed7Sperrin * Grow the block size for a file. 985fa9e4066Sahrens * 986fa9e4066Sahrens * IN: zp - znode of file to free data in. 987fa9e4066Sahrens * size - requested block size 988fa9e4066Sahrens * tx - open transaction. 989fa9e4066Sahrens * 990fa9e4066Sahrens * NOTE: this function assumes that the znode is write locked. 991fa9e4066Sahrens */ 992104e2ed7Sperrin void 993fa9e4066Sahrens zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx) 994fa9e4066Sahrens { 995fa9e4066Sahrens int error; 996fa9e4066Sahrens u_longlong_t dummy; 997fa9e4066Sahrens 998fa9e4066Sahrens if (size <= zp->z_blksz) 999104e2ed7Sperrin return; 1000fa9e4066Sahrens /* 1001fa9e4066Sahrens * If the file size is already greater than the current blocksize, 1002fa9e4066Sahrens * we will not grow. If there is more than one block in a file, 1003fa9e4066Sahrens * the blocksize cannot change. 1004fa9e4066Sahrens */ 1005fa9e4066Sahrens if (zp->z_blksz && zp->z_phys->zp_size > zp->z_blksz) 1006104e2ed7Sperrin return; 1007fa9e4066Sahrens 1008fa9e4066Sahrens error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id, 1009fa9e4066Sahrens size, 0, tx); 1010fa9e4066Sahrens if (error == ENOTSUP) 1011104e2ed7Sperrin return; 1012fa9e4066Sahrens ASSERT3U(error, ==, 0); 1013fa9e4066Sahrens 1014fa9e4066Sahrens /* What blocksize did we actually get? */ 1015fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &zp->z_blksz, &dummy); 1016fa9e4066Sahrens } 1017fa9e4066Sahrens 1018fa9e4066Sahrens /* 1019fa9e4066Sahrens * This is a dummy interface used when pvn_vplist_dirty() should *not* 1020fa9e4066Sahrens * be calling back into the fs for a putpage(). E.g.: when truncating 1021fa9e4066Sahrens * a file, the pages being "thrown away* don't need to be written out. 1022fa9e4066Sahrens */ 1023fa9e4066Sahrens /* ARGSUSED */ 1024fa9e4066Sahrens static int 1025fa9e4066Sahrens zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp, 1026fa9e4066Sahrens int flags, cred_t *cr) 1027fa9e4066Sahrens { 1028fa9e4066Sahrens ASSERT(0); 1029fa9e4066Sahrens return (0); 1030fa9e4066Sahrens } 1031fa9e4066Sahrens 1032fa9e4066Sahrens /* 1033104e2ed7Sperrin * Free space in a file. 1034fa9e4066Sahrens * 1035fa9e4066Sahrens * IN: zp - znode of file to free data in. 10365730cc9aSmaybee * off - start of section to free. 1037fa9e4066Sahrens * len - length of section to free (0 => to EOF). 1038fa9e4066Sahrens * flag - current file open mode flags. 1039fa9e4066Sahrens * 1040fa9e4066Sahrens * RETURN: 0 if success 1041fa9e4066Sahrens * error code if failure 1042fa9e4066Sahrens */ 1043fa9e4066Sahrens int 10445730cc9aSmaybee zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log) 1045fa9e4066Sahrens { 1046fa9e4066Sahrens vnode_t *vp = ZTOV(zp); 10475730cc9aSmaybee dmu_tx_t *tx; 10485730cc9aSmaybee zfsvfs_t *zfsvfs = zp->z_zfsvfs; 10495730cc9aSmaybee zilog_t *zilog = zfsvfs->z_log; 10505730cc9aSmaybee rl_t *rl; 10515730cc9aSmaybee uint64_t end = off + len; 10525730cc9aSmaybee uint64_t size, new_blksz; 1053*da6c28aaSamw uint64_t pflags = zp->z_phys->zp_flags; 1054104e2ed7Sperrin int error; 1055fa9e4066Sahrens 1056*da6c28aaSamw if ((pflags & (ZFS_IMMUTABLE|ZFS_READONLY)) || 1057*da6c28aaSamw off < zp->z_phys->zp_size && (pflags & ZFS_APPENDONLY)) 1058*da6c28aaSamw return (EPERM); 1059*da6c28aaSamw 10608ef9dde0Smarks if (ZTOV(zp)->v_type == VFIFO) 10618ef9dde0Smarks return (0); 10628ef9dde0Smarks 10635730cc9aSmaybee /* 10645730cc9aSmaybee * If we will change zp_size then lock the whole file, 10655730cc9aSmaybee * otherwise just lock the range being freed. 10665730cc9aSmaybee */ 10675730cc9aSmaybee if (len == 0 || off + len > zp->z_phys->zp_size) { 10685730cc9aSmaybee rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER); 10695730cc9aSmaybee } else { 10705730cc9aSmaybee rl = zfs_range_lock(zp, off, len, RL_WRITER); 10715730cc9aSmaybee /* recheck, in case zp_size changed */ 10725730cc9aSmaybee if (off + len > zp->z_phys->zp_size) { 10735730cc9aSmaybee /* lost race: file size changed, lock whole file */ 1074c5c6ffa0Smaybee zfs_range_unlock(rl); 10755730cc9aSmaybee rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER); 10765730cc9aSmaybee } 10775730cc9aSmaybee } 10785730cc9aSmaybee 1079fa9e4066Sahrens /* 1080fa9e4066Sahrens * Nothing to do if file already at desired length. 1081fa9e4066Sahrens */ 10825730cc9aSmaybee size = zp->z_phys->zp_size; 108375c76197Speteh if (len == 0 && size == off && off != 0) { 1084c5c6ffa0Smaybee zfs_range_unlock(rl); 1085fa9e4066Sahrens return (0); 1086fa9e4066Sahrens } 1087fa9e4066Sahrens 1088fa9e4066Sahrens /* 1089fa9e4066Sahrens * Check for any locks in the region to be freed. 1090fa9e4066Sahrens */ 1091fa9e4066Sahrens if (MANDLOCK(vp, (mode_t)zp->z_phys->zp_mode)) { 10925730cc9aSmaybee uint64_t start = off; 10935730cc9aSmaybee uint64_t extent = len; 1094fa9e4066Sahrens 10955730cc9aSmaybee if (off > size) { 1096fa9e4066Sahrens start = size; 10975730cc9aSmaybee extent += off - size; 10985730cc9aSmaybee } else if (len == 0) { 10995730cc9aSmaybee extent = size - off; 11005730cc9aSmaybee } 11015730cc9aSmaybee if (error = chklock(vp, FWRITE, start, extent, flag, NULL)) { 1102c5c6ffa0Smaybee zfs_range_unlock(rl); 1103fa9e4066Sahrens return (error); 11045730cc9aSmaybee } 1105fa9e4066Sahrens } 1106fa9e4066Sahrens 11075730cc9aSmaybee tx = dmu_tx_create(zfsvfs->z_os); 11085730cc9aSmaybee dmu_tx_hold_bonus(tx, zp->z_id); 11095730cc9aSmaybee new_blksz = 0; 11105730cc9aSmaybee if (end > size && 11115730cc9aSmaybee (!ISP2(zp->z_blksz) || zp->z_blksz < zfsvfs->z_max_blksz)) { 1112fa9e4066Sahrens /* 1113fa9e4066Sahrens * We are growing the file past the current block size. 1114fa9e4066Sahrens */ 1115fa9e4066Sahrens if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) { 1116fa9e4066Sahrens ASSERT(!ISP2(zp->z_blksz)); 1117fa9e4066Sahrens new_blksz = MIN(end, SPA_MAXBLOCKSIZE); 1118fa9e4066Sahrens } else { 1119fa9e4066Sahrens new_blksz = MIN(end, zp->z_zfsvfs->z_max_blksz); 1120fa9e4066Sahrens } 11215730cc9aSmaybee dmu_tx_hold_write(tx, zp->z_id, 0, MIN(end, new_blksz)); 11225730cc9aSmaybee } else if (off < size) { 11235730cc9aSmaybee /* 11245730cc9aSmaybee * If len == 0, we are truncating the file. 11255730cc9aSmaybee */ 11265730cc9aSmaybee dmu_tx_hold_free(tx, zp->z_id, off, len ? len : DMU_OBJECT_END); 11275730cc9aSmaybee } 11285730cc9aSmaybee 11295730cc9aSmaybee error = dmu_tx_assign(tx, zfsvfs->z_assign); 11305730cc9aSmaybee if (error) { 11318a2f1b91Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) 11328a2f1b91Sahrens dmu_tx_wait(tx); 11335730cc9aSmaybee dmu_tx_abort(tx); 1134c5c6ffa0Smaybee zfs_range_unlock(rl); 11355730cc9aSmaybee return (error); 1136fa9e4066Sahrens } 11375730cc9aSmaybee 11385730cc9aSmaybee if (new_blksz) 11395730cc9aSmaybee zfs_grow_blocksize(zp, new_blksz, tx); 11405730cc9aSmaybee 1141fa9e4066Sahrens if (end > size || len == 0) 1142fa9e4066Sahrens zp->z_phys->zp_size = end; 11435730cc9aSmaybee 11445730cc9aSmaybee if (off < size) { 11455730cc9aSmaybee objset_t *os = zfsvfs->z_os; 11465dc8af33Smaybee uint64_t rlen = len; 11475730cc9aSmaybee 11485730cc9aSmaybee if (len == 0) 11495dc8af33Smaybee rlen = -1; 11505730cc9aSmaybee else if (end > size) 11515dc8af33Smaybee rlen = size - off; 11525dc8af33Smaybee VERIFY(0 == dmu_free_range(os, zp->z_id, off, rlen, tx)); 11535730cc9aSmaybee } 11545730cc9aSmaybee 11555730cc9aSmaybee if (log) { 11565730cc9aSmaybee zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 1157b19a79ecSperrin zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len); 11585730cc9aSmaybee } 11595730cc9aSmaybee 1160c5c6ffa0Smaybee zfs_range_unlock(rl); 11615730cc9aSmaybee 11625730cc9aSmaybee dmu_tx_commit(tx); 11635730cc9aSmaybee 1164fa9e4066Sahrens /* 11655730cc9aSmaybee * Clear any mapped pages in the truncated region. This has to 11665730cc9aSmaybee * happen outside of the transaction to avoid the possibility of 11675730cc9aSmaybee * a deadlock with someone trying to push a page that we are 11685730cc9aSmaybee * about to invalidate. 1169fa9e4066Sahrens */ 1170fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 11715730cc9aSmaybee if (off < size && vn_has_cached_data(vp)) { 1172fa9e4066Sahrens page_t *pp; 11735730cc9aSmaybee uint64_t start = off & PAGEMASK; 11745730cc9aSmaybee int poff = off & PAGEOFFSET; 1175fa9e4066Sahrens 11765730cc9aSmaybee if (poff != 0 && (pp = page_lookup(vp, start, SE_SHARED))) { 1177fa9e4066Sahrens /* 1178fa9e4066Sahrens * We need to zero a partial page. 1179fa9e4066Sahrens */ 11805730cc9aSmaybee pagezero(pp, poff, PAGESIZE - poff); 1181fa9e4066Sahrens start += PAGESIZE; 1182fa9e4066Sahrens page_unlock(pp); 1183fa9e4066Sahrens } 1184fa9e4066Sahrens error = pvn_vplist_dirty(vp, start, zfs_no_putpage, 11855730cc9aSmaybee B_INVAL | B_TRUNC, NULL); 1186fa9e4066Sahrens ASSERT(error == 0); 1187fa9e4066Sahrens } 1188fa9e4066Sahrens rw_exit(&zp->z_map_lock); 1189fa9e4066Sahrens 1190fa9e4066Sahrens return (0); 1191fa9e4066Sahrens } 1192fa9e4066Sahrens 1193fa9e4066Sahrens void 1194*da6c28aaSamw zfs_create_fs(objset_t *os, cred_t *cr, uint64_t version, 1195*da6c28aaSamw int norm, dmu_tx_t *tx) 1196fa9e4066Sahrens { 1197fa9e4066Sahrens zfsvfs_t zfsvfs; 1198fa9e4066Sahrens uint64_t moid, doid, roid = 0; 1199fa9e4066Sahrens int error; 1200fa9e4066Sahrens znode_t *rootzp = NULL; 1201fa9e4066Sahrens vnode_t *vp; 1202fa9e4066Sahrens vattr_t vattr; 1203fa9e4066Sahrens 1204fa9e4066Sahrens /* 1205fa9e4066Sahrens * First attempt to create master node. 1206fa9e4066Sahrens */ 1207ea8dc4b6Seschrock /* 1208ea8dc4b6Seschrock * In an empty objset, there are no blocks to read and thus 1209ea8dc4b6Seschrock * there can be no i/o errors (which we assert below). 1210ea8dc4b6Seschrock */ 1211fa9e4066Sahrens moid = MASTER_NODE_OBJ; 1212fa9e4066Sahrens error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE, 1213fa9e4066Sahrens DMU_OT_NONE, 0, tx); 1214fa9e4066Sahrens ASSERT(error == 0); 1215fa9e4066Sahrens 1216fa9e4066Sahrens /* 1217fa9e4066Sahrens * Set starting attributes. 1218fa9e4066Sahrens */ 1219fa9e4066Sahrens 1220e7437265Sahrens error = zap_update(os, moid, ZPL_VERSION_STR, 8, 1, &version, tx); 1221fa9e4066Sahrens ASSERT(error == 0); 1222fa9e4066Sahrens 1223fa9e4066Sahrens /* 1224fa9e4066Sahrens * Create a delete queue. 1225fa9e4066Sahrens */ 1226893a6d32Sahrens doid = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx); 1227fa9e4066Sahrens 1228893a6d32Sahrens error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &doid, tx); 1229fa9e4066Sahrens ASSERT(error == 0); 1230fa9e4066Sahrens 1231fa9e4066Sahrens /* 1232fa9e4066Sahrens * Create root znode. Create minimal znode/vnode/zfsvfs 1233fa9e4066Sahrens * to allow zfs_mknode to work. 1234fa9e4066Sahrens */ 1235fa9e4066Sahrens vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 1236fa9e4066Sahrens vattr.va_type = VDIR; 1237fa9e4066Sahrens vattr.va_mode = S_IFDIR|0755; 1238ecd6cf80Smarks vattr.va_uid = crgetuid(cr); 1239ecd6cf80Smarks vattr.va_gid = crgetgid(cr); 1240fa9e4066Sahrens 1241fa9e4066Sahrens rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP); 1242fa9e4066Sahrens rootzp->z_zfsvfs = &zfsvfs; 1243893a6d32Sahrens rootzp->z_unlinked = 0; 1244fa9e4066Sahrens rootzp->z_atime_dirty = 0; 1245fa9e4066Sahrens rootzp->z_dbuf_held = 0; 1246fa9e4066Sahrens 1247fa9e4066Sahrens vp = ZTOV(rootzp); 1248fa9e4066Sahrens vn_reinit(vp); 1249fa9e4066Sahrens vp->v_type = VDIR; 1250fa9e4066Sahrens 1251fa9e4066Sahrens bzero(&zfsvfs, sizeof (zfsvfs_t)); 1252fa9e4066Sahrens 1253fa9e4066Sahrens zfsvfs.z_os = os; 1254fa9e4066Sahrens zfsvfs.z_assign = TXG_NOWAIT; 1255fa9e4066Sahrens zfsvfs.z_parent = &zfsvfs; 1256*da6c28aaSamw zfsvfs.z_version = version; 1257*da6c28aaSamw zfsvfs.z_use_fuids = USE_FUIDS(version, os); 1258*da6c28aaSamw zfsvfs.z_norm = norm; 1259fa9e4066Sahrens 1260fa9e4066Sahrens mutex_init(&zfsvfs.z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); 1261fa9e4066Sahrens list_create(&zfsvfs.z_all_znodes, sizeof (znode_t), 1262fa9e4066Sahrens offsetof(znode_t, z_link_node)); 1263fa9e4066Sahrens 1264*da6c28aaSamw zfs_mknode(rootzp, &vattr, &roid, tx, cr, IS_ROOT_NODE, 1265*da6c28aaSamw NULL, 0, NULL, NULL); 1266fa9e4066Sahrens ASSERT3U(rootzp->z_id, ==, roid); 1267fa9e4066Sahrens error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &roid, tx); 1268fa9e4066Sahrens ASSERT(error == 0); 1269fa9e4066Sahrens 1270fa9e4066Sahrens ZTOV(rootzp)->v_count = 0; 1271fa9e4066Sahrens kmem_cache_free(znode_cache, rootzp); 1272fa9e4066Sahrens } 127355434c77Sek 1274*da6c28aaSamw #endif /* _KERNEL */ 127555434c77Sek /* 127655434c77Sek * Given an object number, return its parent object number and whether 127755434c77Sek * or not the object is an extended attribute directory. 127855434c77Sek */ 127955434c77Sek static int 128055434c77Sek zfs_obj_to_pobj(objset_t *osp, uint64_t obj, uint64_t *pobjp, int *is_xattrdir) 128155434c77Sek { 128255434c77Sek dmu_buf_t *db; 128355434c77Sek dmu_object_info_t doi; 128455434c77Sek znode_phys_t *zp; 128555434c77Sek int error; 128655434c77Sek 128755434c77Sek if ((error = dmu_bonus_hold(osp, obj, FTAG, &db)) != 0) 128855434c77Sek return (error); 128955434c77Sek 129055434c77Sek dmu_object_info_from_db(db, &doi); 129155434c77Sek if (doi.doi_bonus_type != DMU_OT_ZNODE || 129255434c77Sek doi.doi_bonus_size < sizeof (znode_phys_t)) { 129355434c77Sek dmu_buf_rele(db, FTAG); 129455434c77Sek return (EINVAL); 129555434c77Sek } 129655434c77Sek 129755434c77Sek zp = db->db_data; 129855434c77Sek *pobjp = zp->zp_parent; 129955434c77Sek *is_xattrdir = ((zp->zp_flags & ZFS_XATTR) != 0) && 130055434c77Sek S_ISDIR(zp->zp_mode); 130155434c77Sek dmu_buf_rele(db, FTAG); 130255434c77Sek 130355434c77Sek return (0); 130455434c77Sek } 130555434c77Sek 130655434c77Sek int 130755434c77Sek zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len) 130855434c77Sek { 130955434c77Sek char *path = buf + len - 1; 131055434c77Sek int error; 131155434c77Sek 131255434c77Sek *path = '\0'; 131355434c77Sek 131455434c77Sek for (;;) { 131555434c77Sek uint64_t pobj; 131655434c77Sek char component[MAXNAMELEN + 2]; 131755434c77Sek size_t complen; 131855434c77Sek int is_xattrdir; 131955434c77Sek 132055434c77Sek if ((error = zfs_obj_to_pobj(osp, obj, &pobj, 132155434c77Sek &is_xattrdir)) != 0) 132255434c77Sek break; 132355434c77Sek 132455434c77Sek if (pobj == obj) { 132555434c77Sek if (path[0] != '/') 132655434c77Sek *--path = '/'; 132755434c77Sek break; 132855434c77Sek } 132955434c77Sek 133055434c77Sek component[0] = '/'; 133155434c77Sek if (is_xattrdir) { 133255434c77Sek (void) sprintf(component + 1, "<xattrdir>"); 133355434c77Sek } else { 1334e7437265Sahrens error = zap_value_search(osp, pobj, obj, 1335e7437265Sahrens ZFS_DIRENT_OBJ(-1ULL), component + 1); 133655434c77Sek if (error != 0) 133755434c77Sek break; 133855434c77Sek } 133955434c77Sek 134055434c77Sek complen = strlen(component); 134155434c77Sek path -= complen; 134255434c77Sek ASSERT(path >= buf); 134355434c77Sek bcopy(component, path, complen); 134455434c77Sek obj = pobj; 134555434c77Sek } 134655434c77Sek 134755434c77Sek if (error == 0) 134855434c77Sek (void) memmove(buf, path, buf + len - path); 134955434c77Sek return (error); 135055434c77Sek } 1351