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 /* 228ef9dde0Smarks * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 27fa9e4066Sahrens 28fa9e4066Sahrens #include <sys/types.h> 29fa9e4066Sahrens #include <sys/param.h> 30fa9e4066Sahrens #include <sys/time.h> 31fa9e4066Sahrens #include <sys/systm.h> 32fa9e4066Sahrens #include <sys/sysmacros.h> 33fa9e4066Sahrens #include <sys/resource.h> 34fa9e4066Sahrens #include <sys/mntent.h> 35fa9e4066Sahrens #include <sys/vfs.h> 36fa9e4066Sahrens #include <sys/vnode.h> 37fa9e4066Sahrens #include <sys/file.h> 38fa9e4066Sahrens #include <sys/kmem.h> 39fa9e4066Sahrens #include <sys/cmn_err.h> 40fa9e4066Sahrens #include <sys/errno.h> 41fa9e4066Sahrens #include <sys/unistd.h> 42fa9e4066Sahrens #include <sys/stat.h> 43fa9e4066Sahrens #include <sys/mode.h> 44fa9e4066Sahrens #include <sys/atomic.h> 45fa9e4066Sahrens #include <vm/pvn.h> 46fa9e4066Sahrens #include "fs/fs_subr.h" 47fa9e4066Sahrens #include <sys/zfs_dir.h> 48fa9e4066Sahrens #include <sys/zfs_acl.h> 49fa9e4066Sahrens #include <sys/zfs_ioctl.h> 50fa9e4066Sahrens #include <sys/zfs_znode.h> 51*104e2ed7Sperrin #include <sys/zfs_rlock.h> 52fa9e4066Sahrens #include <sys/zap.h> 53fa9e4066Sahrens #include <sys/dmu.h> 54fa9e4066Sahrens #include <sys/fs/zfs.h> 55fa9e4066Sahrens 56fa9e4066Sahrens struct kmem_cache *znode_cache = NULL; 57fa9e4066Sahrens 58fa9e4066Sahrens /*ARGSUSED*/ 59fa9e4066Sahrens static void 60fa9e4066Sahrens znode_pageout_func(dmu_buf_t *dbuf, void *user_ptr) 61fa9e4066Sahrens { 62fa9e4066Sahrens znode_t *zp = user_ptr; 63fa9e4066Sahrens vnode_t *vp = ZTOV(zp); 64fa9e4066Sahrens 65ea8dc4b6Seschrock mutex_enter(&zp->z_lock); 66fa9e4066Sahrens if (vp->v_count == 0) { 67ea8dc4b6Seschrock mutex_exit(&zp->z_lock); 68fa9e4066Sahrens vn_invalid(vp); 69fa9e4066Sahrens zfs_znode_free(zp); 70ea8dc4b6Seschrock } else { 71ea8dc4b6Seschrock /* signal force unmount that this znode can be freed */ 72ea8dc4b6Seschrock zp->z_dbuf = NULL; 73ea8dc4b6Seschrock mutex_exit(&zp->z_lock); 74fa9e4066Sahrens } 75fa9e4066Sahrens } 76fa9e4066Sahrens 77fa9e4066Sahrens /*ARGSUSED*/ 78fa9e4066Sahrens static int 79fa9e4066Sahrens zfs_znode_cache_constructor(void *buf, void *cdrarg, int kmflags) 80fa9e4066Sahrens { 81fa9e4066Sahrens znode_t *zp = buf; 82fa9e4066Sahrens 83fa9e4066Sahrens zp->z_vnode = vn_alloc(KM_SLEEP); 84fa9e4066Sahrens zp->z_vnode->v_data = (caddr_t)zp; 85fa9e4066Sahrens mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL); 86fa9e4066Sahrens rw_init(&zp->z_map_lock, NULL, RW_DEFAULT, NULL); 87*104e2ed7Sperrin rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL); 88fa9e4066Sahrens mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL); 89*104e2ed7Sperrin 90*104e2ed7Sperrin mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL); 91*104e2ed7Sperrin avl_create(&zp->z_range_avl, zfs_range_compare, 92*104e2ed7Sperrin sizeof (rl_t), offsetof(rl_t, r_node)); 93*104e2ed7Sperrin 94fa9e4066Sahrens zp->z_dbuf_held = 0; 95fa9e4066Sahrens zp->z_dirlocks = 0; 96fa9e4066Sahrens return (0); 97fa9e4066Sahrens } 98fa9e4066Sahrens 99fa9e4066Sahrens /*ARGSUSED*/ 100fa9e4066Sahrens static void 101fa9e4066Sahrens zfs_znode_cache_destructor(void *buf, void *cdarg) 102fa9e4066Sahrens { 103fa9e4066Sahrens znode_t *zp = buf; 104fa9e4066Sahrens 105fa9e4066Sahrens ASSERT(zp->z_dirlocks == 0); 106fa9e4066Sahrens mutex_destroy(&zp->z_lock); 107fa9e4066Sahrens rw_destroy(&zp->z_map_lock); 108*104e2ed7Sperrin rw_destroy(&zp->z_parent_lock); 109fa9e4066Sahrens mutex_destroy(&zp->z_acl_lock); 110*104e2ed7Sperrin avl_destroy(&zp->z_range_avl); 111fa9e4066Sahrens 112fa9e4066Sahrens ASSERT(zp->z_dbuf_held == 0); 113fa9e4066Sahrens ASSERT(ZTOV(zp)->v_count == 0); 114fa9e4066Sahrens vn_free(ZTOV(zp)); 115fa9e4066Sahrens } 116fa9e4066Sahrens 117fa9e4066Sahrens void 118fa9e4066Sahrens zfs_znode_init(void) 119fa9e4066Sahrens { 120fa9e4066Sahrens /* 121fa9e4066Sahrens * Initialize zcache 122fa9e4066Sahrens */ 123fa9e4066Sahrens ASSERT(znode_cache == NULL); 124fa9e4066Sahrens znode_cache = kmem_cache_create("zfs_znode_cache", 125fa9e4066Sahrens sizeof (znode_t), 0, zfs_znode_cache_constructor, 126fa9e4066Sahrens zfs_znode_cache_destructor, NULL, NULL, NULL, 0); 127fa9e4066Sahrens } 128fa9e4066Sahrens 129fa9e4066Sahrens void 130fa9e4066Sahrens zfs_znode_fini(void) 131fa9e4066Sahrens { 132fa9e4066Sahrens /* 133fa9e4066Sahrens * Cleanup vfs & vnode ops 134fa9e4066Sahrens */ 135fa9e4066Sahrens zfs_remove_op_tables(); 136fa9e4066Sahrens 137fa9e4066Sahrens /* 138fa9e4066Sahrens * Cleanup zcache 139fa9e4066Sahrens */ 140fa9e4066Sahrens if (znode_cache) 141fa9e4066Sahrens kmem_cache_destroy(znode_cache); 142fa9e4066Sahrens znode_cache = NULL; 143fa9e4066Sahrens } 144fa9e4066Sahrens 145fa9e4066Sahrens struct vnodeops *zfs_dvnodeops; 146fa9e4066Sahrens struct vnodeops *zfs_fvnodeops; 147fa9e4066Sahrens struct vnodeops *zfs_symvnodeops; 148fa9e4066Sahrens struct vnodeops *zfs_xdvnodeops; 149fa9e4066Sahrens struct vnodeops *zfs_evnodeops; 150fa9e4066Sahrens 151fa9e4066Sahrens void 152fa9e4066Sahrens zfs_remove_op_tables() 153fa9e4066Sahrens { 154fa9e4066Sahrens /* 155fa9e4066Sahrens * Remove vfs ops 156fa9e4066Sahrens */ 157fa9e4066Sahrens ASSERT(zfsfstype); 158fa9e4066Sahrens (void) vfs_freevfsops_by_type(zfsfstype); 159fa9e4066Sahrens zfsfstype = 0; 160fa9e4066Sahrens 161fa9e4066Sahrens /* 162fa9e4066Sahrens * Remove vnode ops 163fa9e4066Sahrens */ 164fa9e4066Sahrens if (zfs_dvnodeops) 165fa9e4066Sahrens vn_freevnodeops(zfs_dvnodeops); 166fa9e4066Sahrens if (zfs_fvnodeops) 167fa9e4066Sahrens vn_freevnodeops(zfs_fvnodeops); 168fa9e4066Sahrens if (zfs_symvnodeops) 169fa9e4066Sahrens vn_freevnodeops(zfs_symvnodeops); 170fa9e4066Sahrens if (zfs_xdvnodeops) 171fa9e4066Sahrens vn_freevnodeops(zfs_xdvnodeops); 172fa9e4066Sahrens if (zfs_evnodeops) 173fa9e4066Sahrens vn_freevnodeops(zfs_evnodeops); 174fa9e4066Sahrens 175fa9e4066Sahrens zfs_dvnodeops = NULL; 176fa9e4066Sahrens zfs_fvnodeops = NULL; 177fa9e4066Sahrens zfs_symvnodeops = NULL; 178fa9e4066Sahrens zfs_xdvnodeops = NULL; 179fa9e4066Sahrens zfs_evnodeops = NULL; 180fa9e4066Sahrens } 181fa9e4066Sahrens 182fa9e4066Sahrens extern const fs_operation_def_t zfs_dvnodeops_template[]; 183fa9e4066Sahrens extern const fs_operation_def_t zfs_fvnodeops_template[]; 184fa9e4066Sahrens extern const fs_operation_def_t zfs_xdvnodeops_template[]; 185fa9e4066Sahrens extern const fs_operation_def_t zfs_symvnodeops_template[]; 186fa9e4066Sahrens extern const fs_operation_def_t zfs_evnodeops_template[]; 187fa9e4066Sahrens 188fa9e4066Sahrens int 189fa9e4066Sahrens zfs_create_op_tables() 190fa9e4066Sahrens { 191fa9e4066Sahrens int error; 192fa9e4066Sahrens 193fa9e4066Sahrens /* 194fa9e4066Sahrens * zfs_dvnodeops can be set if mod_remove() calls mod_installfs() 195fa9e4066Sahrens * due to a failure to remove the the 2nd modlinkage (zfs_modldrv). 196fa9e4066Sahrens * In this case we just return as the ops vectors are already set up. 197fa9e4066Sahrens */ 198fa9e4066Sahrens if (zfs_dvnodeops) 199fa9e4066Sahrens return (0); 200fa9e4066Sahrens 201fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template, 202fa9e4066Sahrens &zfs_dvnodeops); 203fa9e4066Sahrens if (error) 204fa9e4066Sahrens return (error); 205fa9e4066Sahrens 206fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template, 207fa9e4066Sahrens &zfs_fvnodeops); 208fa9e4066Sahrens if (error) 209fa9e4066Sahrens return (error); 210fa9e4066Sahrens 211fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template, 212fa9e4066Sahrens &zfs_symvnodeops); 213fa9e4066Sahrens if (error) 214fa9e4066Sahrens return (error); 215fa9e4066Sahrens 216fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template, 217fa9e4066Sahrens &zfs_xdvnodeops); 218fa9e4066Sahrens if (error) 219fa9e4066Sahrens return (error); 220fa9e4066Sahrens 221fa9e4066Sahrens error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template, 222fa9e4066Sahrens &zfs_evnodeops); 223fa9e4066Sahrens 224fa9e4066Sahrens return (error); 225fa9e4066Sahrens } 226fa9e4066Sahrens 227fa9e4066Sahrens /* 228fa9e4066Sahrens * zfs_init_fs - Initialize the zfsvfs struct and the file system 229fa9e4066Sahrens * incore "master" object. Verify version compatibility. 230fa9e4066Sahrens */ 231fa9e4066Sahrens int 232fa9e4066Sahrens zfs_init_fs(zfsvfs_t *zfsvfs, znode_t **zpp, cred_t *cr) 233fa9e4066Sahrens { 234fa9e4066Sahrens extern int zfsfstype; 235fa9e4066Sahrens 236fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 237fa9e4066Sahrens uint64_t zoid; 238fa9e4066Sahrens uint64_t version = ZFS_VERSION; 239fa9e4066Sahrens int i, error; 240fa9e4066Sahrens dmu_object_info_t doi; 241fa9e4066Sahrens dmu_objset_stats_t *stats; 242fa9e4066Sahrens 243fa9e4066Sahrens *zpp = NULL; 244fa9e4066Sahrens 245fa9e4066Sahrens /* 246fa9e4066Sahrens * XXX - hack to auto-create the pool root filesystem at 247fa9e4066Sahrens * the first attempted mount. 248fa9e4066Sahrens */ 249fa9e4066Sahrens if (dmu_object_info(os, MASTER_NODE_OBJ, &doi) == ENOENT) { 250fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(os); 251fa9e4066Sahrens 252ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, TRUE, NULL); /* master */ 253ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, TRUE, NULL); /* del queue */ 254fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); /* root node */ 255fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 256fa9e4066Sahrens ASSERT3U(error, ==, 0); 257fa9e4066Sahrens zfs_create_fs(os, cr, tx); 258fa9e4066Sahrens dmu_tx_commit(tx); 259fa9e4066Sahrens } 260fa9e4066Sahrens 261ea8dc4b6Seschrock error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_VERSION_OBJ, 8, 1, 262ea8dc4b6Seschrock &version); 263ea8dc4b6Seschrock if (error) { 264ea8dc4b6Seschrock return (error); 265fa9e4066Sahrens } else if (version != ZFS_VERSION) { 266fa9e4066Sahrens (void) printf("Mismatched versions: File system " 267fa9e4066Sahrens "is version %lld on-disk format, which is " 268fa9e4066Sahrens "incompatible with this software version %lld!", 269fa9e4066Sahrens (u_longlong_t)version, ZFS_VERSION); 270fa9e4066Sahrens return (ENOTSUP); 271fa9e4066Sahrens } 272fa9e4066Sahrens 273fa9e4066Sahrens /* 274fa9e4066Sahrens * The fsid is 64 bits, composed of an 8-bit fs type, which 275fa9e4066Sahrens * separates our fsid from any other filesystem types, and a 276fa9e4066Sahrens * 56-bit objset unique ID. The objset unique ID is unique to 277fa9e4066Sahrens * all objsets open on this system, provided by unique_create(). 278fa9e4066Sahrens * The 8-bit fs type must be put in the low bits of fsid[1] 279fa9e4066Sahrens * because that's where other Solaris filesystems put it. 280fa9e4066Sahrens */ 281fa9e4066Sahrens stats = kmem_alloc(sizeof (dmu_objset_stats_t), KM_SLEEP); 282fa9e4066Sahrens dmu_objset_stats(os, stats); 283fa9e4066Sahrens ASSERT((stats->dds_fsid_guid & ~((1ULL<<56)-1)) == 0); 284fa9e4066Sahrens zfsvfs->z_vfs->vfs_fsid.val[0] = stats->dds_fsid_guid; 285fa9e4066Sahrens zfsvfs->z_vfs->vfs_fsid.val[1] = ((stats->dds_fsid_guid>>32) << 8) | 286fa9e4066Sahrens zfsfstype & 0xFF; 287fa9e4066Sahrens kmem_free(stats, sizeof (dmu_objset_stats_t)); 288fa9e4066Sahrens stats = NULL; 289fa9e4066Sahrens 290ea8dc4b6Seschrock error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, &zoid); 291ea8dc4b6Seschrock if (error) 292ea8dc4b6Seschrock return (error); 293fa9e4066Sahrens ASSERT(zoid != 0); 294fa9e4066Sahrens zfsvfs->z_root = zoid; 295fa9e4066Sahrens 296fa9e4066Sahrens /* 297fa9e4066Sahrens * Create the per mount vop tables. 298fa9e4066Sahrens */ 299fa9e4066Sahrens 300fa9e4066Sahrens /* 301fa9e4066Sahrens * Initialize zget mutex's 302fa9e4066Sahrens */ 303fa9e4066Sahrens for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 304fa9e4066Sahrens mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); 305fa9e4066Sahrens 306fa9e4066Sahrens error = zfs_zget(zfsvfs, zoid, zpp); 307fa9e4066Sahrens if (error) 308fa9e4066Sahrens return (error); 309fa9e4066Sahrens ASSERT3U((*zpp)->z_id, ==, zoid); 310fa9e4066Sahrens 311ea8dc4b6Seschrock error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_DELETE_QUEUE, 8, 1, &zoid); 312ea8dc4b6Seschrock if (error) 313ea8dc4b6Seschrock return (error); 314fa9e4066Sahrens 315fa9e4066Sahrens zfsvfs->z_dqueue = zoid; 316fa9e4066Sahrens 317fa9e4066Sahrens /* 318fa9e4066Sahrens * Initialize delete head structure 319fa9e4066Sahrens * Thread(s) will be started/stopped via 320fa9e4066Sahrens * readonly_changed_cb() depending 321fa9e4066Sahrens * on whether this is rw/ro mount. 322fa9e4066Sahrens */ 323fa9e4066Sahrens list_create(&zfsvfs->z_delete_head.z_znodes, 324fa9e4066Sahrens sizeof (znode_t), offsetof(znode_t, z_list_node)); 325fa9e4066Sahrens 326fa9e4066Sahrens return (0); 327fa9e4066Sahrens } 328fa9e4066Sahrens 329fa9e4066Sahrens /* 330fa9e4066Sahrens * Construct a new znode/vnode and intialize. 331fa9e4066Sahrens * 332fa9e4066Sahrens * This does not do a call to dmu_set_user() that is 333fa9e4066Sahrens * up to the caller to do, in case you don't want to 334fa9e4066Sahrens * return the znode 335fa9e4066Sahrens */ 336ea8dc4b6Seschrock static znode_t * 337fa9e4066Sahrens zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, uint64_t obj_num, int blksz) 338fa9e4066Sahrens { 339fa9e4066Sahrens znode_t *zp; 340fa9e4066Sahrens vnode_t *vp; 341fa9e4066Sahrens 342fa9e4066Sahrens zp = kmem_cache_alloc(znode_cache, KM_SLEEP); 343fa9e4066Sahrens 344fa9e4066Sahrens ASSERT(zp->z_dirlocks == NULL); 345fa9e4066Sahrens 346fa9e4066Sahrens zp->z_phys = db->db_data; 347fa9e4066Sahrens zp->z_zfsvfs = zfsvfs; 348fa9e4066Sahrens zp->z_active = 1; 349fa9e4066Sahrens zp->z_reap = 0; 350fa9e4066Sahrens zp->z_atime_dirty = 0; 351fa9e4066Sahrens zp->z_dbuf_held = 0; 352fa9e4066Sahrens zp->z_mapcnt = 0; 353fa9e4066Sahrens zp->z_last_itx = 0; 354fa9e4066Sahrens zp->z_dbuf = db; 355fa9e4066Sahrens zp->z_id = obj_num; 356fa9e4066Sahrens zp->z_blksz = blksz; 357fa9e4066Sahrens zp->z_seq = 0x7A4653; 358fa9e4066Sahrens 359fa9e4066Sahrens mutex_enter(&zfsvfs->z_znodes_lock); 360fa9e4066Sahrens list_insert_tail(&zfsvfs->z_all_znodes, zp); 361fa9e4066Sahrens mutex_exit(&zfsvfs->z_znodes_lock); 362fa9e4066Sahrens 363fa9e4066Sahrens vp = ZTOV(zp); 364fa9e4066Sahrens vn_reinit(vp); 365fa9e4066Sahrens 366fa9e4066Sahrens vp->v_vfsp = zfsvfs->z_parent->z_vfs; 367fa9e4066Sahrens vp->v_type = IFTOVT((mode_t)zp->z_phys->zp_mode); 368fa9e4066Sahrens 369fa9e4066Sahrens switch (vp->v_type) { 370fa9e4066Sahrens case VDIR: 371fa9e4066Sahrens if (zp->z_phys->zp_flags & ZFS_XATTR) { 372fa9e4066Sahrens vn_setops(vp, zfs_xdvnodeops); 373fa9e4066Sahrens vp->v_flag |= V_XATTRDIR; 374fa9e4066Sahrens } else 375fa9e4066Sahrens vn_setops(vp, zfs_dvnodeops); 3767f6e3e7dSperrin zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */ 377fa9e4066Sahrens break; 378fa9e4066Sahrens case VBLK: 379fa9e4066Sahrens case VCHR: 380fa9e4066Sahrens vp->v_rdev = (dev_t)zp->z_phys->zp_rdev; 381fa9e4066Sahrens /*FALLTHROUGH*/ 382fa9e4066Sahrens case VFIFO: 383fa9e4066Sahrens case VSOCK: 384fa9e4066Sahrens case VDOOR: 385fa9e4066Sahrens vn_setops(vp, zfs_fvnodeops); 386fa9e4066Sahrens break; 387fa9e4066Sahrens case VREG: 388fa9e4066Sahrens vp->v_flag |= VMODSORT; 389fa9e4066Sahrens vn_setops(vp, zfs_fvnodeops); 390fa9e4066Sahrens break; 391fa9e4066Sahrens case VLNK: 392fa9e4066Sahrens vn_setops(vp, zfs_symvnodeops); 393fa9e4066Sahrens break; 394fa9e4066Sahrens default: 395fa9e4066Sahrens vn_setops(vp, zfs_evnodeops); 396fa9e4066Sahrens break; 397fa9e4066Sahrens } 398fa9e4066Sahrens 399fa9e4066Sahrens return (zp); 400fa9e4066Sahrens } 401fa9e4066Sahrens 402fa9e4066Sahrens static void 403fa9e4066Sahrens zfs_znode_dmu_init(znode_t *zp) 404fa9e4066Sahrens { 405fa9e4066Sahrens znode_t *nzp; 406fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 407fa9e4066Sahrens dmu_buf_t *db = zp->z_dbuf; 408fa9e4066Sahrens 409fa9e4066Sahrens mutex_enter(&zp->z_lock); 410fa9e4066Sahrens 411fa9e4066Sahrens nzp = dmu_buf_set_user(db, zp, &zp->z_phys, znode_pageout_func); 412fa9e4066Sahrens 413fa9e4066Sahrens /* 414fa9e4066Sahrens * there should be no 415fa9e4066Sahrens * concurrent zgets on this object. 416fa9e4066Sahrens */ 417fa9e4066Sahrens ASSERT3P(nzp, ==, NULL); 418fa9e4066Sahrens 419fa9e4066Sahrens /* 420fa9e4066Sahrens * Slap on VROOT if we are the root znode 421fa9e4066Sahrens */ 422fa9e4066Sahrens if (zp->z_id == zfsvfs->z_root) { 423fa9e4066Sahrens ZTOV(zp)->v_flag |= VROOT; 424fa9e4066Sahrens } 425fa9e4066Sahrens 426fa9e4066Sahrens ASSERT(zp->z_dbuf_held == 0); 427fa9e4066Sahrens zp->z_dbuf_held = 1; 428fa9e4066Sahrens VFS_HOLD(zfsvfs->z_vfs); 429fa9e4066Sahrens mutex_exit(&zp->z_lock); 430fa9e4066Sahrens vn_exists(ZTOV(zp)); 431fa9e4066Sahrens } 432fa9e4066Sahrens 433fa9e4066Sahrens /* 434fa9e4066Sahrens * Create a new DMU object to hold a zfs znode. 435fa9e4066Sahrens * 436fa9e4066Sahrens * IN: dzp - parent directory for new znode 437fa9e4066Sahrens * vap - file attributes for new znode 438fa9e4066Sahrens * tx - dmu transaction id for zap operations 439fa9e4066Sahrens * cr - credentials of caller 440fa9e4066Sahrens * flag - flags: 441fa9e4066Sahrens * IS_ROOT_NODE - new object will be root 442fa9e4066Sahrens * IS_XATTR - new object is an attribute 443fa9e4066Sahrens * IS_REPLAY - intent log replay 444fa9e4066Sahrens * 445fa9e4066Sahrens * OUT: oid - ID of created object 446fa9e4066Sahrens * 447fa9e4066Sahrens */ 448fa9e4066Sahrens void 449fa9e4066Sahrens zfs_mknode(znode_t *dzp, vattr_t *vap, uint64_t *oid, dmu_tx_t *tx, cred_t *cr, 450fa9e4066Sahrens uint_t flag, znode_t **zpp, int bonuslen) 451fa9e4066Sahrens { 452fa9e4066Sahrens dmu_buf_t *dbp; 453fa9e4066Sahrens znode_phys_t *pzp; 454fa9e4066Sahrens znode_t *zp; 455fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 456fa9e4066Sahrens timestruc_t now; 457fa9e4066Sahrens uint64_t gen; 458fa9e4066Sahrens int err; 459fa9e4066Sahrens 460fa9e4066Sahrens ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE)); 461fa9e4066Sahrens 462fa9e4066Sahrens if (zfsvfs->z_assign >= TXG_INITIAL) { /* ZIL replay */ 463fa9e4066Sahrens *oid = vap->va_nodeid; 464fa9e4066Sahrens flag |= IS_REPLAY; 465fa9e4066Sahrens now = vap->va_ctime; /* see zfs_replay_create() */ 466fa9e4066Sahrens gen = vap->va_nblocks; /* ditto */ 467fa9e4066Sahrens } else { 468fa9e4066Sahrens *oid = 0; 469fa9e4066Sahrens gethrestime(&now); 470fa9e4066Sahrens gen = dmu_tx_get_txg(tx); 471fa9e4066Sahrens } 472fa9e4066Sahrens 473fa9e4066Sahrens /* 474fa9e4066Sahrens * Create a new DMU object. 475fa9e4066Sahrens */ 476ea8dc4b6Seschrock /* 477ea8dc4b6Seschrock * There's currently no mechanism for pre-reading the blocks that will 478ea8dc4b6Seschrock * be to needed allocate a new object, so we accept the small chance 479ea8dc4b6Seschrock * that there will be an i/o error and we will fail one of the 480ea8dc4b6Seschrock * assertions below. 481ea8dc4b6Seschrock */ 482fa9e4066Sahrens if (vap->va_type == VDIR) { 483fa9e4066Sahrens if (flag & IS_REPLAY) { 484fa9e4066Sahrens err = zap_create_claim(zfsvfs->z_os, *oid, 485fa9e4066Sahrens DMU_OT_DIRECTORY_CONTENTS, 486fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 487fa9e4066Sahrens ASSERT3U(err, ==, 0); 488fa9e4066Sahrens } else { 489fa9e4066Sahrens *oid = zap_create(zfsvfs->z_os, 490fa9e4066Sahrens DMU_OT_DIRECTORY_CONTENTS, 491fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 492fa9e4066Sahrens } 493fa9e4066Sahrens } else { 494fa9e4066Sahrens if (flag & IS_REPLAY) { 495fa9e4066Sahrens err = dmu_object_claim(zfsvfs->z_os, *oid, 496fa9e4066Sahrens DMU_OT_PLAIN_FILE_CONTENTS, 0, 497fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 498fa9e4066Sahrens ASSERT3U(err, ==, 0); 499fa9e4066Sahrens } else { 500fa9e4066Sahrens *oid = dmu_object_alloc(zfsvfs->z_os, 501fa9e4066Sahrens DMU_OT_PLAIN_FILE_CONTENTS, 0, 502fa9e4066Sahrens DMU_OT_ZNODE, sizeof (znode_phys_t) + bonuslen, tx); 503fa9e4066Sahrens } 504fa9e4066Sahrens } 505ea8dc4b6Seschrock VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, *oid, NULL, &dbp)); 506fa9e4066Sahrens dmu_buf_will_dirty(dbp, tx); 507fa9e4066Sahrens 508fa9e4066Sahrens /* 509fa9e4066Sahrens * Initialize the znode physical data to zero. 510fa9e4066Sahrens */ 511fa9e4066Sahrens ASSERT(dbp->db_size >= sizeof (znode_phys_t)); 512fa9e4066Sahrens bzero(dbp->db_data, dbp->db_size); 513fa9e4066Sahrens pzp = dbp->db_data; 514fa9e4066Sahrens 515fa9e4066Sahrens /* 516fa9e4066Sahrens * If this is the root, fix up the half-initialized parent pointer 517fa9e4066Sahrens * to reference the just-allocated physical data area. 518fa9e4066Sahrens */ 519fa9e4066Sahrens if (flag & IS_ROOT_NODE) { 520fa9e4066Sahrens dzp->z_phys = pzp; 521fa9e4066Sahrens dzp->z_id = *oid; 522fa9e4066Sahrens } 523fa9e4066Sahrens 524fa9e4066Sahrens /* 525fa9e4066Sahrens * If parent is an xattr, so am I. 526fa9e4066Sahrens */ 527fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) 528fa9e4066Sahrens flag |= IS_XATTR; 529fa9e4066Sahrens 530fa9e4066Sahrens if (vap->va_type == VBLK || vap->va_type == VCHR) { 531fa9e4066Sahrens pzp->zp_rdev = vap->va_rdev; 532fa9e4066Sahrens } 533fa9e4066Sahrens 534fa9e4066Sahrens if (vap->va_type == VDIR) { 535fa9e4066Sahrens pzp->zp_size = 2; /* contents ("." and "..") */ 536fa9e4066Sahrens pzp->zp_links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1; 537fa9e4066Sahrens } 538fa9e4066Sahrens 539fa9e4066Sahrens pzp->zp_parent = dzp->z_id; 540fa9e4066Sahrens if (flag & IS_XATTR) 541fa9e4066Sahrens pzp->zp_flags |= ZFS_XATTR; 542fa9e4066Sahrens 543fa9e4066Sahrens pzp->zp_gen = gen; 544fa9e4066Sahrens 545fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_crtime); 546fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_ctime); 547fa9e4066Sahrens 548fa9e4066Sahrens if (vap->va_mask & AT_ATIME) { 549fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 550fa9e4066Sahrens } else { 551fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_atime); 552fa9e4066Sahrens } 553fa9e4066Sahrens 554fa9e4066Sahrens if (vap->va_mask & AT_MTIME) { 555fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 556fa9e4066Sahrens } else { 557fa9e4066Sahrens ZFS_TIME_ENCODE(&now, pzp->zp_mtime); 558fa9e4066Sahrens } 559fa9e4066Sahrens 560fa9e4066Sahrens pzp->zp_mode = MAKEIMODE(vap->va_type, vap->va_mode); 561fa9e4066Sahrens zp = zfs_znode_alloc(zfsvfs, dbp, *oid, 0); 562fa9e4066Sahrens 563fa9e4066Sahrens zfs_perm_init(zp, dzp, flag, vap, tx, cr); 564fa9e4066Sahrens 565fa9e4066Sahrens if (zpp) { 566fa9e4066Sahrens kmutex_t *hash_mtx = ZFS_OBJ_MUTEX(zp); 567fa9e4066Sahrens 568fa9e4066Sahrens mutex_enter(hash_mtx); 569fa9e4066Sahrens zfs_znode_dmu_init(zp); 570ea8dc4b6Seschrock mutex_exit(hash_mtx); 571ea8dc4b6Seschrock 572fa9e4066Sahrens *zpp = zp; 573fa9e4066Sahrens } else { 574fa9e4066Sahrens ZTOV(zp)->v_count = 0; 575ea8dc4b6Seschrock dmu_buf_rele(dbp, NULL); 576fa9e4066Sahrens zfs_znode_free(zp); 577fa9e4066Sahrens } 578fa9e4066Sahrens } 579fa9e4066Sahrens 580fa9e4066Sahrens int 581fa9e4066Sahrens zfs_zget(zfsvfs_t *zfsvfs, uint64_t obj_num, znode_t **zpp) 582fa9e4066Sahrens { 583fa9e4066Sahrens dmu_object_info_t doi; 584fa9e4066Sahrens dmu_buf_t *db; 585fa9e4066Sahrens znode_t *zp; 586ea8dc4b6Seschrock int err; 587fa9e4066Sahrens 588fa9e4066Sahrens *zpp = NULL; 589fa9e4066Sahrens 590fa9e4066Sahrens ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num); 591fa9e4066Sahrens 592ea8dc4b6Seschrock err = dmu_bonus_hold(zfsvfs->z_os, obj_num, NULL, &db); 593ea8dc4b6Seschrock if (err) { 594fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 595ea8dc4b6Seschrock return (err); 596fa9e4066Sahrens } 597fa9e4066Sahrens 598fa9e4066Sahrens dmu_object_info_from_db(db, &doi); 599fa9e4066Sahrens if (doi.doi_bonus_type != DMU_OT_ZNODE || 600fa9e4066Sahrens doi.doi_bonus_size < sizeof (znode_phys_t)) { 601ea8dc4b6Seschrock dmu_buf_rele(db, NULL); 602fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 603fa9e4066Sahrens return (EINVAL); 604fa9e4066Sahrens } 605fa9e4066Sahrens 606fa9e4066Sahrens ASSERT(db->db_object == obj_num); 607fa9e4066Sahrens ASSERT(db->db_offset == -1); 608fa9e4066Sahrens ASSERT(db->db_data != NULL); 609fa9e4066Sahrens 610fa9e4066Sahrens zp = dmu_buf_get_user(db); 611fa9e4066Sahrens 612fa9e4066Sahrens if (zp != NULL) { 613fa9e4066Sahrens mutex_enter(&zp->z_lock); 614fa9e4066Sahrens 615fa9e4066Sahrens ASSERT3U(zp->z_id, ==, obj_num); 616fa9e4066Sahrens if (zp->z_reap) { 617ea8dc4b6Seschrock dmu_buf_rele(db, NULL); 618fa9e4066Sahrens mutex_exit(&zp->z_lock); 619fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 620fa9e4066Sahrens return (ENOENT); 621fa9e4066Sahrens } else if (zp->z_dbuf_held) { 622ea8dc4b6Seschrock dmu_buf_rele(db, NULL); 623fa9e4066Sahrens } else { 624fa9e4066Sahrens zp->z_dbuf_held = 1; 625fa9e4066Sahrens VFS_HOLD(zfsvfs->z_vfs); 626fa9e4066Sahrens } 627fa9e4066Sahrens 628ea8dc4b6Seschrock if (zp->z_active == 0) 629fa9e4066Sahrens zp->z_active = 1; 630ea8dc4b6Seschrock 631fa9e4066Sahrens VN_HOLD(ZTOV(zp)); 632fa9e4066Sahrens mutex_exit(&zp->z_lock); 633ea8dc4b6Seschrock ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 634fa9e4066Sahrens *zpp = zp; 635fa9e4066Sahrens return (0); 636fa9e4066Sahrens } 637fa9e4066Sahrens 638fa9e4066Sahrens /* 639fa9e4066Sahrens * Not found create new znode/vnode 640fa9e4066Sahrens */ 641fa9e4066Sahrens zp = zfs_znode_alloc(zfsvfs, db, obj_num, doi.doi_data_block_size); 642fa9e4066Sahrens ASSERT3U(zp->z_id, ==, obj_num); 643fa9e4066Sahrens zfs_znode_dmu_init(zp); 644ea8dc4b6Seschrock ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); 645fa9e4066Sahrens *zpp = zp; 646fa9e4066Sahrens return (0); 647fa9e4066Sahrens } 648fa9e4066Sahrens 649fa9e4066Sahrens void 650fa9e4066Sahrens zfs_znode_delete(znode_t *zp, dmu_tx_t *tx) 651fa9e4066Sahrens { 652fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 653fa9e4066Sahrens int error; 654fa9e4066Sahrens 655fa9e4066Sahrens ZFS_OBJ_HOLD_ENTER(zfsvfs, zp->z_id); 656fa9e4066Sahrens if (zp->z_phys->zp_acl.z_acl_extern_obj) { 657fa9e4066Sahrens error = dmu_object_free(zfsvfs->z_os, 658fa9e4066Sahrens zp->z_phys->zp_acl.z_acl_extern_obj, tx); 659fa9e4066Sahrens ASSERT3U(error, ==, 0); 660fa9e4066Sahrens } 661fa9e4066Sahrens error = dmu_object_free(zfsvfs->z_os, zp->z_id, tx); 662fa9e4066Sahrens ASSERT3U(error, ==, 0); 663fa9e4066Sahrens zp->z_dbuf_held = 0; 664fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, zp->z_id); 665ea8dc4b6Seschrock dmu_buf_rele(zp->z_dbuf, NULL); 666fa9e4066Sahrens } 667fa9e4066Sahrens 668fa9e4066Sahrens void 669fa9e4066Sahrens zfs_zinactive(znode_t *zp) 670fa9e4066Sahrens { 671fa9e4066Sahrens vnode_t *vp = ZTOV(zp); 672fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 673fa9e4066Sahrens uint64_t z_id = zp->z_id; 674fa9e4066Sahrens 675fa9e4066Sahrens ASSERT(zp->z_dbuf_held && zp->z_phys); 676fa9e4066Sahrens 677fa9e4066Sahrens /* 678fa9e4066Sahrens * Don't allow a zfs_zget() while were trying to release this znode 679fa9e4066Sahrens */ 680fa9e4066Sahrens ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id); 681fa9e4066Sahrens 682fa9e4066Sahrens mutex_enter(&zp->z_lock); 683fa9e4066Sahrens mutex_enter(&vp->v_lock); 684fa9e4066Sahrens vp->v_count--; 685fa9e4066Sahrens if (vp->v_count > 0 || vn_has_cached_data(vp)) { 686fa9e4066Sahrens /* 687fa9e4066Sahrens * If the hold count is greater than zero, somebody has 688fa9e4066Sahrens * obtained a new reference on this znode while we were 689fa9e4066Sahrens * processing it here, so we are done. If we still have 690fa9e4066Sahrens * mapped pages then we are also done, since we don't 691fa9e4066Sahrens * want to inactivate the znode until the pages get pushed. 692fa9e4066Sahrens * 693fa9e4066Sahrens * XXX - if vn_has_cached_data(vp) is true, but count == 0, 694fa9e4066Sahrens * this seems like it would leave the znode hanging with 695fa9e4066Sahrens * no chance to go inactive... 696fa9e4066Sahrens */ 697fa9e4066Sahrens mutex_exit(&vp->v_lock); 698fa9e4066Sahrens mutex_exit(&zp->z_lock); 699fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); 700fa9e4066Sahrens return; 701fa9e4066Sahrens } 702fa9e4066Sahrens mutex_exit(&vp->v_lock); 703fa9e4066Sahrens zp->z_active = 0; 704fa9e4066Sahrens 705fa9e4066Sahrens /* 706fa9e4066Sahrens * If this was the last reference to a file with no links, 707fa9e4066Sahrens * remove the file from the file system. 708fa9e4066Sahrens */ 709fa9e4066Sahrens if (zp->z_reap) { 710fa9e4066Sahrens mutex_exit(&zp->z_lock); 711fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); 712fa9e4066Sahrens /* XATTR files are not put on the delete queue */ 713fa9e4066Sahrens if (zp->z_phys->zp_flags & ZFS_XATTR) { 714fa9e4066Sahrens zfs_rmnode(zp); 715fa9e4066Sahrens } else { 716fa9e4066Sahrens mutex_enter(&zfsvfs->z_delete_head.z_mutex); 717fa9e4066Sahrens list_insert_tail(&zfsvfs->z_delete_head.z_znodes, zp); 718fa9e4066Sahrens zfsvfs->z_delete_head.z_znode_count++; 719fa9e4066Sahrens cv_broadcast(&zfsvfs->z_delete_head.z_cv); 720fa9e4066Sahrens mutex_exit(&zfsvfs->z_delete_head.z_mutex); 721fa9e4066Sahrens } 722fa9e4066Sahrens VFS_RELE(zfsvfs->z_vfs); 723fa9e4066Sahrens return; 724fa9e4066Sahrens } 725ea8dc4b6Seschrock ASSERT(zp->z_phys); 726ea8dc4b6Seschrock ASSERT(zp->z_dbuf_held); 727fa9e4066Sahrens 728ea8dc4b6Seschrock zp->z_dbuf_held = 0; 729fa9e4066Sahrens mutex_exit(&zp->z_lock); 730ea8dc4b6Seschrock dmu_buf_rele(zp->z_dbuf, NULL); 731fa9e4066Sahrens ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); 732ea8dc4b6Seschrock VFS_RELE(zfsvfs->z_vfs); 733fa9e4066Sahrens } 734fa9e4066Sahrens 735fa9e4066Sahrens void 736fa9e4066Sahrens zfs_znode_free(znode_t *zp) 737fa9e4066Sahrens { 738fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 739fa9e4066Sahrens 740fa9e4066Sahrens mutex_enter(&zfsvfs->z_znodes_lock); 741fa9e4066Sahrens list_remove(&zfsvfs->z_all_znodes, zp); 742fa9e4066Sahrens mutex_exit(&zfsvfs->z_znodes_lock); 743fa9e4066Sahrens 744fa9e4066Sahrens kmem_cache_free(znode_cache, zp); 745fa9e4066Sahrens } 746fa9e4066Sahrens 747fa9e4066Sahrens void 748fa9e4066Sahrens zfs_time_stamper_locked(znode_t *zp, uint_t flag, dmu_tx_t *tx) 749fa9e4066Sahrens { 750fa9e4066Sahrens timestruc_t now; 751fa9e4066Sahrens 752fa9e4066Sahrens ASSERT(MUTEX_HELD(&zp->z_lock)); 753fa9e4066Sahrens 754fa9e4066Sahrens gethrestime(&now); 755fa9e4066Sahrens 756fa9e4066Sahrens if (tx) { 757fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 758fa9e4066Sahrens zp->z_atime_dirty = 0; 759fa9e4066Sahrens zp->z_seq++; 760fa9e4066Sahrens } else { 761fa9e4066Sahrens zp->z_atime_dirty = 1; 762fa9e4066Sahrens } 763fa9e4066Sahrens 764fa9e4066Sahrens if (flag & AT_ATIME) 765fa9e4066Sahrens ZFS_TIME_ENCODE(&now, zp->z_phys->zp_atime); 766fa9e4066Sahrens 767fa9e4066Sahrens if (flag & AT_MTIME) 768fa9e4066Sahrens ZFS_TIME_ENCODE(&now, zp->z_phys->zp_mtime); 769fa9e4066Sahrens 770fa9e4066Sahrens if (flag & AT_CTIME) 771fa9e4066Sahrens ZFS_TIME_ENCODE(&now, zp->z_phys->zp_ctime); 772fa9e4066Sahrens } 773fa9e4066Sahrens 774fa9e4066Sahrens /* 775fa9e4066Sahrens * Update the requested znode timestamps with the current time. 776fa9e4066Sahrens * If we are in a transaction, then go ahead and mark the znode 777fa9e4066Sahrens * dirty in the transaction so the timestamps will go to disk. 778fa9e4066Sahrens * Otherwise, we will get pushed next time the znode is updated 779fa9e4066Sahrens * in a transaction, or when this znode eventually goes inactive. 780fa9e4066Sahrens * 781fa9e4066Sahrens * Why is this OK? 782fa9e4066Sahrens * 1 - Only the ACCESS time is ever updated outside of a transaction. 783fa9e4066Sahrens * 2 - Multiple consecutive updates will be collapsed into a single 784fa9e4066Sahrens * znode update by the transaction grouping semantics of the DMU. 785fa9e4066Sahrens */ 786fa9e4066Sahrens void 787fa9e4066Sahrens zfs_time_stamper(znode_t *zp, uint_t flag, dmu_tx_t *tx) 788fa9e4066Sahrens { 789fa9e4066Sahrens mutex_enter(&zp->z_lock); 790fa9e4066Sahrens zfs_time_stamper_locked(zp, flag, tx); 791fa9e4066Sahrens mutex_exit(&zp->z_lock); 792fa9e4066Sahrens } 793fa9e4066Sahrens 794fa9e4066Sahrens /* 795*104e2ed7Sperrin * Grow the block size for a file. 796fa9e4066Sahrens * 797fa9e4066Sahrens * IN: zp - znode of file to free data in. 798fa9e4066Sahrens * size - requested block size 799fa9e4066Sahrens * tx - open transaction. 800fa9e4066Sahrens * 801fa9e4066Sahrens * NOTE: this function assumes that the znode is write locked. 802fa9e4066Sahrens */ 803*104e2ed7Sperrin void 804fa9e4066Sahrens zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx) 805fa9e4066Sahrens { 806fa9e4066Sahrens int error; 807fa9e4066Sahrens u_longlong_t dummy; 808fa9e4066Sahrens 809fa9e4066Sahrens if (size <= zp->z_blksz) 810*104e2ed7Sperrin return; 811fa9e4066Sahrens /* 812fa9e4066Sahrens * If the file size is already greater than the current blocksize, 813fa9e4066Sahrens * we will not grow. If there is more than one block in a file, 814fa9e4066Sahrens * the blocksize cannot change. 815fa9e4066Sahrens */ 816fa9e4066Sahrens if (zp->z_blksz && zp->z_phys->zp_size > zp->z_blksz) 817*104e2ed7Sperrin return; 818fa9e4066Sahrens 819fa9e4066Sahrens error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id, 820fa9e4066Sahrens size, 0, tx); 821fa9e4066Sahrens if (error == ENOTSUP) 822*104e2ed7Sperrin return; 823fa9e4066Sahrens ASSERT3U(error, ==, 0); 824fa9e4066Sahrens 825fa9e4066Sahrens /* What blocksize did we actually get? */ 826fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &zp->z_blksz, &dummy); 827fa9e4066Sahrens } 828fa9e4066Sahrens 829fa9e4066Sahrens /* 830fa9e4066Sahrens * This is a dummy interface used when pvn_vplist_dirty() should *not* 831fa9e4066Sahrens * be calling back into the fs for a putpage(). E.g.: when truncating 832fa9e4066Sahrens * a file, the pages being "thrown away* don't need to be written out. 833fa9e4066Sahrens */ 834fa9e4066Sahrens /* ARGSUSED */ 835fa9e4066Sahrens static int 836fa9e4066Sahrens zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp, 837fa9e4066Sahrens int flags, cred_t *cr) 838fa9e4066Sahrens { 839fa9e4066Sahrens ASSERT(0); 840fa9e4066Sahrens return (0); 841fa9e4066Sahrens } 842fa9e4066Sahrens 843fa9e4066Sahrens /* 844*104e2ed7Sperrin * Free space in a file. 845fa9e4066Sahrens * 846fa9e4066Sahrens * IN: zp - znode of file to free data in. 847fa9e4066Sahrens * from - start of section to free. 848fa9e4066Sahrens * len - length of section to free (0 => to EOF). 849fa9e4066Sahrens * flag - current file open mode flags. 850fa9e4066Sahrens * tx - open transaction. 851fa9e4066Sahrens * 852fa9e4066Sahrens * RETURN: 0 if success 853fa9e4066Sahrens * error code if failure 854fa9e4066Sahrens */ 855fa9e4066Sahrens int 856fa9e4066Sahrens zfs_freesp(znode_t *zp, uint64_t from, uint64_t len, int flag, dmu_tx_t *tx, 857fa9e4066Sahrens cred_t *cr) 858fa9e4066Sahrens { 859fa9e4066Sahrens vnode_t *vp = ZTOV(zp); 860fa9e4066Sahrens uint64_t size = zp->z_phys->zp_size; 861fa9e4066Sahrens uint64_t end = from + len; 862*104e2ed7Sperrin int error; 863fa9e4066Sahrens 8648ef9dde0Smarks if (ZTOV(zp)->v_type == VFIFO) 8658ef9dde0Smarks return (0); 8668ef9dde0Smarks 867fa9e4066Sahrens /* 868fa9e4066Sahrens * Nothing to do if file already at desired length. 869fa9e4066Sahrens */ 870fa9e4066Sahrens if (len == 0 && size == from) { 871fa9e4066Sahrens return (0); 872fa9e4066Sahrens } 873fa9e4066Sahrens 874fa9e4066Sahrens /* 875fa9e4066Sahrens * Check for any locks in the region to be freed. 876fa9e4066Sahrens */ 877fa9e4066Sahrens if (MANDLOCK(vp, (mode_t)zp->z_phys->zp_mode)) { 878fa9e4066Sahrens uint64_t start; 879fa9e4066Sahrens 880fa9e4066Sahrens if (size > from) 881fa9e4066Sahrens start = from; 882fa9e4066Sahrens else 883fa9e4066Sahrens start = size; 884fa9e4066Sahrens if (error = chklock(vp, FWRITE, start, 0, flag, NULL)) 885fa9e4066Sahrens return (error); 886fa9e4066Sahrens } 887fa9e4066Sahrens 888fa9e4066Sahrens if (end > zp->z_blksz && (!ISP2(zp->z_blksz) || 889fa9e4066Sahrens zp->z_blksz < zp->z_zfsvfs->z_max_blksz)) { 890fa9e4066Sahrens uint64_t new_blksz; 891fa9e4066Sahrens /* 892fa9e4066Sahrens * We are growing the file past the current block size. 893fa9e4066Sahrens */ 894fa9e4066Sahrens if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) { 895fa9e4066Sahrens ASSERT(!ISP2(zp->z_blksz)); 896fa9e4066Sahrens new_blksz = MIN(end, SPA_MAXBLOCKSIZE); 897fa9e4066Sahrens } else { 898fa9e4066Sahrens new_blksz = MIN(end, zp->z_zfsvfs->z_max_blksz); 899fa9e4066Sahrens } 900*104e2ed7Sperrin zfs_grow_blocksize(zp, new_blksz, tx); 901fa9e4066Sahrens } 902fa9e4066Sahrens if (end > size || len == 0) 903fa9e4066Sahrens zp->z_phys->zp_size = end; 904fa9e4066Sahrens if (from > size) 905fa9e4066Sahrens return (0); 906fa9e4066Sahrens 907fa9e4066Sahrens /* 908fa9e4066Sahrens * Clear any mapped pages in the truncated region. 909fa9e4066Sahrens */ 910fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 911fa9e4066Sahrens if (vn_has_cached_data(vp)) { 912fa9e4066Sahrens page_t *pp; 913fa9e4066Sahrens uint64_t start = from & PAGEMASK; 914fa9e4066Sahrens int off = from & PAGEOFFSET; 915fa9e4066Sahrens 916fa9e4066Sahrens if (off != 0 && (pp = page_lookup(vp, start, SE_SHARED))) { 917fa9e4066Sahrens /* 918fa9e4066Sahrens * We need to zero a partial page. 919fa9e4066Sahrens */ 920fa9e4066Sahrens pagezero(pp, off, PAGESIZE - off); 921fa9e4066Sahrens start += PAGESIZE; 922fa9e4066Sahrens page_unlock(pp); 923fa9e4066Sahrens } 924fa9e4066Sahrens error = pvn_vplist_dirty(vp, start, zfs_no_putpage, 925fa9e4066Sahrens B_INVAL | B_TRUNC, cr); 926fa9e4066Sahrens ASSERT(error == 0); 927fa9e4066Sahrens } 928fa9e4066Sahrens rw_exit(&zp->z_map_lock); 929fa9e4066Sahrens 930fa9e4066Sahrens if (len == 0) 931fa9e4066Sahrens len = -1; 932fa9e4066Sahrens else if (end > size) 933fa9e4066Sahrens len = size - from; 934ea8dc4b6Seschrock VERIFY(0 == dmu_free_range(zp->z_zfsvfs->z_os, 935ea8dc4b6Seschrock zp->z_id, from, len, tx)); 936fa9e4066Sahrens 937fa9e4066Sahrens return (0); 938fa9e4066Sahrens } 939fa9e4066Sahrens 940fa9e4066Sahrens void 941fa9e4066Sahrens zfs_create_fs(objset_t *os, cred_t *cr, dmu_tx_t *tx) 942fa9e4066Sahrens { 943fa9e4066Sahrens zfsvfs_t zfsvfs; 944fa9e4066Sahrens uint64_t moid, doid, roid = 0; 945fa9e4066Sahrens uint64_t version = ZFS_VERSION; 946fa9e4066Sahrens int error; 947fa9e4066Sahrens znode_t *rootzp = NULL; 948fa9e4066Sahrens vnode_t *vp; 949fa9e4066Sahrens vattr_t vattr; 950fa9e4066Sahrens 951fa9e4066Sahrens /* 952fa9e4066Sahrens * First attempt to create master node. 953fa9e4066Sahrens */ 954ea8dc4b6Seschrock /* 955ea8dc4b6Seschrock * In an empty objset, there are no blocks to read and thus 956ea8dc4b6Seschrock * there can be no i/o errors (which we assert below). 957ea8dc4b6Seschrock */ 958fa9e4066Sahrens moid = MASTER_NODE_OBJ; 959fa9e4066Sahrens error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE, 960fa9e4066Sahrens DMU_OT_NONE, 0, tx); 961fa9e4066Sahrens ASSERT(error == 0); 962fa9e4066Sahrens 963fa9e4066Sahrens /* 964fa9e4066Sahrens * Set starting attributes. 965fa9e4066Sahrens */ 966fa9e4066Sahrens 967fa9e4066Sahrens error = zap_update(os, moid, ZFS_VERSION_OBJ, 8, 1, &version, tx); 968fa9e4066Sahrens ASSERT(error == 0); 969fa9e4066Sahrens 970fa9e4066Sahrens /* 971fa9e4066Sahrens * Create a delete queue. 972fa9e4066Sahrens */ 973fa9e4066Sahrens doid = zap_create(os, DMU_OT_DELETE_QUEUE, DMU_OT_NONE, 0, tx); 974fa9e4066Sahrens 975fa9e4066Sahrens error = zap_add(os, moid, ZFS_DELETE_QUEUE, 8, 1, &doid, tx); 976fa9e4066Sahrens ASSERT(error == 0); 977fa9e4066Sahrens 978fa9e4066Sahrens /* 979fa9e4066Sahrens * Create root znode. Create minimal znode/vnode/zfsvfs 980fa9e4066Sahrens * to allow zfs_mknode to work. 981fa9e4066Sahrens */ 982fa9e4066Sahrens vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; 983fa9e4066Sahrens vattr.va_type = VDIR; 984fa9e4066Sahrens vattr.va_mode = S_IFDIR|0755; 985fa9e4066Sahrens vattr.va_uid = 0; 986fa9e4066Sahrens vattr.va_gid = 3; 987fa9e4066Sahrens 988fa9e4066Sahrens rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP); 989fa9e4066Sahrens rootzp->z_zfsvfs = &zfsvfs; 990fa9e4066Sahrens rootzp->z_active = 1; 991fa9e4066Sahrens rootzp->z_reap = 0; 992fa9e4066Sahrens rootzp->z_atime_dirty = 0; 993fa9e4066Sahrens rootzp->z_dbuf_held = 0; 994fa9e4066Sahrens 995fa9e4066Sahrens vp = ZTOV(rootzp); 996fa9e4066Sahrens vn_reinit(vp); 997fa9e4066Sahrens vp->v_type = VDIR; 998fa9e4066Sahrens 999fa9e4066Sahrens bzero(&zfsvfs, sizeof (zfsvfs_t)); 1000fa9e4066Sahrens 1001fa9e4066Sahrens zfsvfs.z_os = os; 1002fa9e4066Sahrens zfsvfs.z_assign = TXG_NOWAIT; 1003fa9e4066Sahrens zfsvfs.z_parent = &zfsvfs; 1004fa9e4066Sahrens 1005fa9e4066Sahrens mutex_init(&zfsvfs.z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); 1006fa9e4066Sahrens list_create(&zfsvfs.z_all_znodes, sizeof (znode_t), 1007fa9e4066Sahrens offsetof(znode_t, z_link_node)); 1008fa9e4066Sahrens 1009fa9e4066Sahrens zfs_mknode(rootzp, &vattr, &roid, tx, cr, IS_ROOT_NODE, NULL, 0); 1010fa9e4066Sahrens ASSERT3U(rootzp->z_id, ==, roid); 1011fa9e4066Sahrens error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &roid, tx); 1012fa9e4066Sahrens ASSERT(error == 0); 1013fa9e4066Sahrens 1014fa9e4066Sahrens ZTOV(rootzp)->v_count = 0; 1015fa9e4066Sahrens kmem_cache_free(znode_cache, rootzp); 1016fa9e4066Sahrens } 1017