zfs_vfsops.c revision 222199
1168404Spjd/* 2168404Spjd * CDDL HEADER START 3168404Spjd * 4168404Spjd * The contents of this file are subject to the terms of the 5168404Spjd * Common Development and Distribution License (the "License"). 6168404Spjd * You may not use this file except in compliance with the License. 7168404Spjd * 8168404Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9168404Spjd * or http://www.opensolaris.org/os/licensing. 10168404Spjd * See the License for the specific language governing permissions 11168404Spjd * and limitations under the License. 12168404Spjd * 13168404Spjd * When distributing Covered Code, include this CDDL HEADER in each 14168404Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15168404Spjd * If applicable, add the following below this CDDL HEADER, with the 16168404Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17168404Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18168404Spjd * 19168404Spjd * CDDL HEADER END 20168404Spjd */ 21168404Spjd/* 22219089Spjd * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23168404Spjd */ 24168404Spjd 25219089Spjd/* Portions Copyright 2010 Robert Milkowski */ 26219089Spjd 27168404Spjd#include <sys/types.h> 28168404Spjd#include <sys/param.h> 29168404Spjd#include <sys/systm.h> 30168404Spjd#include <sys/kernel.h> 31168404Spjd#include <sys/sysmacros.h> 32168404Spjd#include <sys/kmem.h> 33168404Spjd#include <sys/acl.h> 34168404Spjd#include <sys/vnode.h> 35168404Spjd#include <sys/vfs.h> 36168404Spjd#include <sys/mntent.h> 37168404Spjd#include <sys/mount.h> 38168404Spjd#include <sys/cmn_err.h> 39168404Spjd#include <sys/zfs_znode.h> 40168404Spjd#include <sys/zfs_dir.h> 41168404Spjd#include <sys/zil.h> 42168404Spjd#include <sys/fs/zfs.h> 43168404Spjd#include <sys/dmu.h> 44168404Spjd#include <sys/dsl_prop.h> 45168404Spjd#include <sys/dsl_dataset.h> 46185029Spjd#include <sys/dsl_deleg.h> 47168404Spjd#include <sys/spa.h> 48168404Spjd#include <sys/zap.h> 49219089Spjd#include <sys/sa.h> 50168404Spjd#include <sys/varargs.h> 51168962Spjd#include <sys/policy.h> 52168404Spjd#include <sys/atomic.h> 53168404Spjd#include <sys/zfs_ioctl.h> 54168404Spjd#include <sys/zfs_ctldir.h> 55185029Spjd#include <sys/zfs_fuid.h> 56168962Spjd#include <sys/sunddi.h> 57168404Spjd#include <sys/dnlc.h> 58185029Spjd#include <sys/dmu_objset.h> 59185029Spjd#include <sys/spa_boot.h> 60219089Spjd#include <sys/sa.h> 61219089Spjd#include "zfs_comutil.h" 62168404Spjd 63168404Spjdstruct mtx zfs_debug_mtx; 64168404SpjdMTX_SYSINIT(zfs_debug_mtx, &zfs_debug_mtx, "zfs_debug", MTX_DEF); 65185029Spjd 66168404SpjdSYSCTL_NODE(_vfs, OID_AUTO, zfs, CTLFLAG_RW, 0, "ZFS file system"); 67185029Spjd 68219089Spjdint zfs_super_owner; 69185029SpjdSYSCTL_INT(_vfs_zfs, OID_AUTO, super_owner, CTLFLAG_RW, &zfs_super_owner, 0, 70185029Spjd "File system owner can perform privileged operation on his file systems"); 71185029Spjd 72219089Spjdint zfs_debug_level; 73168713SpjdTUNABLE_INT("vfs.zfs.debug", &zfs_debug_level); 74168404SpjdSYSCTL_INT(_vfs_zfs, OID_AUTO, debug, CTLFLAG_RW, &zfs_debug_level, 0, 75168404Spjd "Debug level"); 76168404Spjd 77185029SpjdSYSCTL_NODE(_vfs_zfs, OID_AUTO, version, CTLFLAG_RD, 0, "ZFS versions"); 78185029Spjdstatic int zfs_version_acl = ZFS_ACL_VERSION; 79185029SpjdSYSCTL_INT(_vfs_zfs_version, OID_AUTO, acl, CTLFLAG_RD, &zfs_version_acl, 0, 80185029Spjd "ZFS_ACL_VERSION"); 81185029Spjdstatic int zfs_version_spa = SPA_VERSION; 82185029SpjdSYSCTL_INT(_vfs_zfs_version, OID_AUTO, spa, CTLFLAG_RD, &zfs_version_spa, 0, 83185029Spjd "SPA_VERSION"); 84185029Spjdstatic int zfs_version_zpl = ZPL_VERSION; 85185029SpjdSYSCTL_INT(_vfs_zfs_version, OID_AUTO, zpl, CTLFLAG_RD, &zfs_version_zpl, 0, 86185029Spjd "ZPL_VERSION"); 87185029Spjd 88191990Sattiliostatic int zfs_mount(vfs_t *vfsp); 89191990Sattiliostatic int zfs_umount(vfs_t *vfsp, int fflag); 90191990Sattiliostatic int zfs_root(vfs_t *vfsp, int flags, vnode_t **vpp); 91191990Sattiliostatic int zfs_statfs(vfs_t *vfsp, struct statfs *statp); 92168404Spjdstatic int zfs_vget(vfs_t *vfsp, ino_t ino, int flags, vnode_t **vpp); 93191990Sattiliostatic int zfs_sync(vfs_t *vfsp, int waitfor); 94196982Spjdstatic int zfs_checkexp(vfs_t *vfsp, struct sockaddr *nam, int *extflagsp, 95196982Spjd struct ucred **credanonp, int *numsecflavors, int **secflavors); 96222167Srmacklemstatic int zfs_fhtovp(vfs_t *vfsp, fid_t *fidp, int flags, vnode_t **vpp); 97168404Spjdstatic void zfs_objset_close(zfsvfs_t *zfsvfs); 98168404Spjdstatic void zfs_freevfs(vfs_t *vfsp); 99168404Spjd 100168404Spjdstatic struct vfsops zfs_vfsops = { 101168404Spjd .vfs_mount = zfs_mount, 102168404Spjd .vfs_unmount = zfs_umount, 103168404Spjd .vfs_root = zfs_root, 104168404Spjd .vfs_statfs = zfs_statfs, 105168404Spjd .vfs_vget = zfs_vget, 106168404Spjd .vfs_sync = zfs_sync, 107196982Spjd .vfs_checkexp = zfs_checkexp, 108168404Spjd .vfs_fhtovp = zfs_fhtovp, 109168404Spjd}; 110168404Spjd 111185029SpjdVFS_SET(zfs_vfsops, zfs, VFCF_JAIL | VFCF_DELEGADMIN); 112168404Spjd 113168404Spjd/* 114168404Spjd * We need to keep a count of active fs's. 115168404Spjd * This is necessary to prevent our module 116168404Spjd * from being unloaded after a umount -f 117168404Spjd */ 118168404Spjdstatic uint32_t zfs_active_fs_count = 0; 119168404Spjd 120168404Spjd/*ARGSUSED*/ 121168404Spjdstatic int 122191990Sattiliozfs_sync(vfs_t *vfsp, int waitfor) 123168404Spjd{ 124168404Spjd 125168404Spjd /* 126168404Spjd * Data integrity is job one. We don't want a compromised kernel 127168404Spjd * writing to the storage pool, so we never sync during panic. 128168404Spjd */ 129168404Spjd if (panicstr) 130168404Spjd return (0); 131168404Spjd 132168404Spjd if (vfsp != NULL) { 133168404Spjd /* 134168404Spjd * Sync a specific filesystem. 135168404Spjd */ 136168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 137209962Smm dsl_pool_t *dp; 138168404Spjd int error; 139168404Spjd 140191990Sattilio error = vfs_stdsync(vfsp, waitfor); 141168404Spjd if (error != 0) 142168404Spjd return (error); 143168404Spjd 144168404Spjd ZFS_ENTER(zfsvfs); 145209962Smm dp = dmu_objset_pool(zfsvfs->z_os); 146209962Smm 147209962Smm /* 148209962Smm * If the system is shutting down, then skip any 149209962Smm * filesystems which may exist on a suspended pool. 150209962Smm */ 151209962Smm if (sys_shutdown && spa_suspended(dp->dp_spa)) { 152209962Smm ZFS_EXIT(zfsvfs); 153209962Smm return (0); 154209962Smm } 155209962Smm 156168404Spjd if (zfsvfs->z_log != NULL) 157219089Spjd zil_commit(zfsvfs->z_log, 0); 158219089Spjd 159168404Spjd ZFS_EXIT(zfsvfs); 160168404Spjd } else { 161168404Spjd /* 162168404Spjd * Sync all ZFS filesystems. This is what happens when you 163168404Spjd * run sync(1M). Unlike other filesystems, ZFS honors the 164168404Spjd * request by waiting for all pools to commit all dirty data. 165168404Spjd */ 166168404Spjd spa_sync_allpools(); 167168404Spjd } 168168404Spjd 169168404Spjd return (0); 170168404Spjd} 171168404Spjd 172219089Spjd#ifndef __FreeBSD__ 173219089Spjdstatic int 174219089Spjdzfs_create_unique_device(dev_t *dev) 175219089Spjd{ 176219089Spjd major_t new_major; 177219089Spjd 178219089Spjd do { 179219089Spjd ASSERT3U(zfs_minor, <=, MAXMIN32); 180219089Spjd minor_t start = zfs_minor; 181219089Spjd do { 182219089Spjd mutex_enter(&zfs_dev_mtx); 183219089Spjd if (zfs_minor >= MAXMIN32) { 184219089Spjd /* 185219089Spjd * If we're still using the real major 186219089Spjd * keep out of /dev/zfs and /dev/zvol minor 187219089Spjd * number space. If we're using a getudev()'ed 188219089Spjd * major number, we can use all of its minors. 189219089Spjd */ 190219089Spjd if (zfs_major == ddi_name_to_major(ZFS_DRIVER)) 191219089Spjd zfs_minor = ZFS_MIN_MINOR; 192219089Spjd else 193219089Spjd zfs_minor = 0; 194219089Spjd } else { 195219089Spjd zfs_minor++; 196219089Spjd } 197219089Spjd *dev = makedevice(zfs_major, zfs_minor); 198219089Spjd mutex_exit(&zfs_dev_mtx); 199219089Spjd } while (vfs_devismounted(*dev) && zfs_minor != start); 200219089Spjd if (zfs_minor == start) { 201219089Spjd /* 202219089Spjd * We are using all ~262,000 minor numbers for the 203219089Spjd * current major number. Create a new major number. 204219089Spjd */ 205219089Spjd if ((new_major = getudev()) == (major_t)-1) { 206219089Spjd cmn_err(CE_WARN, 207219089Spjd "zfs_mount: Can't get unique major " 208219089Spjd "device number."); 209219089Spjd return (-1); 210219089Spjd } 211219089Spjd mutex_enter(&zfs_dev_mtx); 212219089Spjd zfs_major = new_major; 213219089Spjd zfs_minor = 0; 214219089Spjd 215219089Spjd mutex_exit(&zfs_dev_mtx); 216219089Spjd } else { 217219089Spjd break; 218219089Spjd } 219219089Spjd /* CONSTANTCONDITION */ 220219089Spjd } while (1); 221219089Spjd 222219089Spjd return (0); 223219089Spjd} 224219089Spjd#endif /* !__FreeBSD__ */ 225219089Spjd 226168404Spjdstatic void 227168404Spjdatime_changed_cb(void *arg, uint64_t newval) 228168404Spjd{ 229168404Spjd zfsvfs_t *zfsvfs = arg; 230168404Spjd 231168404Spjd if (newval == TRUE) { 232168404Spjd zfsvfs->z_atime = TRUE; 233168404Spjd zfsvfs->z_vfs->vfs_flag &= ~MNT_NOATIME; 234168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME); 235168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_ATIME, NULL, 0); 236168404Spjd } else { 237168404Spjd zfsvfs->z_atime = FALSE; 238168404Spjd zfsvfs->z_vfs->vfs_flag |= MNT_NOATIME; 239168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_ATIME); 240168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME, NULL, 0); 241168404Spjd } 242168404Spjd} 243168404Spjd 244168404Spjdstatic void 245168404Spjdxattr_changed_cb(void *arg, uint64_t newval) 246168404Spjd{ 247168404Spjd zfsvfs_t *zfsvfs = arg; 248168404Spjd 249168404Spjd if (newval == TRUE) { 250168404Spjd /* XXX locking on vfs_flag? */ 251168404Spjd#ifdef TODO 252168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_XATTR; 253168404Spjd#endif 254168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR); 255168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_XATTR, NULL, 0); 256168404Spjd } else { 257168404Spjd /* XXX locking on vfs_flag? */ 258168404Spjd#ifdef TODO 259168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_XATTR; 260168404Spjd#endif 261168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_XATTR); 262168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR, NULL, 0); 263168404Spjd } 264168404Spjd} 265168404Spjd 266168404Spjdstatic void 267168404Spjdblksz_changed_cb(void *arg, uint64_t newval) 268168404Spjd{ 269168404Spjd zfsvfs_t *zfsvfs = arg; 270168404Spjd 271168404Spjd if (newval < SPA_MINBLOCKSIZE || 272168404Spjd newval > SPA_MAXBLOCKSIZE || !ISP2(newval)) 273168404Spjd newval = SPA_MAXBLOCKSIZE; 274168404Spjd 275168404Spjd zfsvfs->z_max_blksz = newval; 276204101Spjd zfsvfs->z_vfs->mnt_stat.f_iosize = newval; 277168404Spjd} 278168404Spjd 279168404Spjdstatic void 280168404Spjdreadonly_changed_cb(void *arg, uint64_t newval) 281168404Spjd{ 282168404Spjd zfsvfs_t *zfsvfs = arg; 283168404Spjd 284168404Spjd if (newval) { 285168404Spjd /* XXX locking on vfs_flag? */ 286168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_RDONLY; 287168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RW); 288168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RO, NULL, 0); 289168404Spjd } else { 290168404Spjd /* XXX locking on vfs_flag? */ 291168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; 292168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RO); 293168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RW, NULL, 0); 294168404Spjd } 295168404Spjd} 296168404Spjd 297168404Spjdstatic void 298168404Spjdsetuid_changed_cb(void *arg, uint64_t newval) 299168404Spjd{ 300168404Spjd zfsvfs_t *zfsvfs = arg; 301168404Spjd 302168404Spjd if (newval == FALSE) { 303168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_NOSETUID; 304168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_SETUID); 305168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID, NULL, 0); 306168404Spjd } else { 307168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_NOSETUID; 308168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID); 309168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_SETUID, NULL, 0); 310168404Spjd } 311168404Spjd} 312168404Spjd 313168404Spjdstatic void 314168404Spjdexec_changed_cb(void *arg, uint64_t newval) 315168404Spjd{ 316168404Spjd zfsvfs_t *zfsvfs = arg; 317168404Spjd 318168404Spjd if (newval == FALSE) { 319168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_NOEXEC; 320168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_EXEC); 321168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC, NULL, 0); 322168404Spjd } else { 323168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_NOEXEC; 324168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC); 325168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_EXEC, NULL, 0); 326168404Spjd } 327168404Spjd} 328168404Spjd 329185029Spjd/* 330185029Spjd * The nbmand mount option can be changed at mount time. 331185029Spjd * We can't allow it to be toggled on live file systems or incorrect 332185029Spjd * behavior may be seen from cifs clients 333185029Spjd * 334185029Spjd * This property isn't registered via dsl_prop_register(), but this callback 335185029Spjd * will be called when a file system is first mounted 336185029Spjd */ 337168404Spjdstatic void 338185029Spjdnbmand_changed_cb(void *arg, uint64_t newval) 339185029Spjd{ 340185029Spjd zfsvfs_t *zfsvfs = arg; 341185029Spjd if (newval == FALSE) { 342185029Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND); 343185029Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND, NULL, 0); 344185029Spjd } else { 345185029Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND); 346185029Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND, NULL, 0); 347185029Spjd } 348185029Spjd} 349185029Spjd 350185029Spjdstatic void 351168404Spjdsnapdir_changed_cb(void *arg, uint64_t newval) 352168404Spjd{ 353168404Spjd zfsvfs_t *zfsvfs = arg; 354168404Spjd 355168404Spjd zfsvfs->z_show_ctldir = newval; 356168404Spjd} 357168404Spjd 358168404Spjdstatic void 359185029Spjdvscan_changed_cb(void *arg, uint64_t newval) 360185029Spjd{ 361185029Spjd zfsvfs_t *zfsvfs = arg; 362185029Spjd 363185029Spjd zfsvfs->z_vscan = newval; 364185029Spjd} 365185029Spjd 366185029Spjdstatic void 367168404Spjdacl_inherit_changed_cb(void *arg, uint64_t newval) 368168404Spjd{ 369168404Spjd zfsvfs_t *zfsvfs = arg; 370168404Spjd 371168404Spjd zfsvfs->z_acl_inherit = newval; 372168404Spjd} 373168404Spjd 374168404Spjdstatic int 375168404Spjdzfs_register_callbacks(vfs_t *vfsp) 376168404Spjd{ 377168404Spjd struct dsl_dataset *ds = NULL; 378168404Spjd objset_t *os = NULL; 379168404Spjd zfsvfs_t *zfsvfs = NULL; 380185029Spjd uint64_t nbmand; 381219089Spjd int readonly, do_readonly = B_FALSE; 382219089Spjd int setuid, do_setuid = B_FALSE; 383219089Spjd int exec, do_exec = B_FALSE; 384219089Spjd int xattr, do_xattr = B_FALSE; 385219089Spjd int atime, do_atime = B_FALSE; 386168404Spjd int error = 0; 387168404Spjd 388168404Spjd ASSERT(vfsp); 389168404Spjd zfsvfs = vfsp->vfs_data; 390168404Spjd ASSERT(zfsvfs); 391168404Spjd os = zfsvfs->z_os; 392168404Spjd 393168404Spjd /* 394196965Spjd * This function can be called for a snapshot when we update snapshot's 395196965Spjd * mount point, which isn't really supported. 396196965Spjd */ 397196965Spjd if (dmu_objset_is_snapshot(os)) 398196965Spjd return (EOPNOTSUPP); 399196965Spjd 400196965Spjd /* 401168404Spjd * The act of registering our callbacks will destroy any mount 402168404Spjd * options we may have. In order to enable temporary overrides 403168404Spjd * of mount options, we stash away the current values and 404168404Spjd * restore them after we register the callbacks. 405168404Spjd */ 406219089Spjd if (vfs_optionisset(vfsp, MNTOPT_RO, NULL) || 407219089Spjd !spa_writeable(dmu_objset_spa(os))) { 408168404Spjd readonly = B_TRUE; 409168404Spjd do_readonly = B_TRUE; 410168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) { 411168404Spjd readonly = B_FALSE; 412168404Spjd do_readonly = B_TRUE; 413168404Spjd } 414168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) { 415168404Spjd setuid = B_FALSE; 416168404Spjd do_setuid = B_TRUE; 417168404Spjd } else { 418168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) { 419168404Spjd setuid = B_FALSE; 420168404Spjd do_setuid = B_TRUE; 421168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) { 422168404Spjd setuid = B_TRUE; 423168404Spjd do_setuid = B_TRUE; 424168404Spjd } 425168404Spjd } 426168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) { 427168404Spjd exec = B_FALSE; 428168404Spjd do_exec = B_TRUE; 429168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) { 430168404Spjd exec = B_TRUE; 431168404Spjd do_exec = B_TRUE; 432168404Spjd } 433168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL)) { 434168404Spjd xattr = B_FALSE; 435168404Spjd do_xattr = B_TRUE; 436168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL)) { 437168404Spjd xattr = B_TRUE; 438168404Spjd do_xattr = B_TRUE; 439168404Spjd } 440185029Spjd if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) { 441185029Spjd atime = B_FALSE; 442185029Spjd do_atime = B_TRUE; 443185029Spjd } else if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL)) { 444185029Spjd atime = B_TRUE; 445185029Spjd do_atime = B_TRUE; 446185029Spjd } 447168404Spjd 448168404Spjd /* 449185029Spjd * nbmand is a special property. It can only be changed at 450185029Spjd * mount time. 451185029Spjd * 452185029Spjd * This is weird, but it is documented to only be changeable 453185029Spjd * at mount time. 454185029Spjd */ 455185029Spjd if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) { 456185029Spjd nbmand = B_FALSE; 457185029Spjd } else if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) { 458185029Spjd nbmand = B_TRUE; 459185029Spjd } else { 460185029Spjd char osname[MAXNAMELEN]; 461185029Spjd 462185029Spjd dmu_objset_name(os, osname); 463185029Spjd if (error = dsl_prop_get_integer(osname, "nbmand", &nbmand, 464185029Spjd NULL)) { 465185029Spjd return (error); 466185029Spjd } 467185029Spjd } 468185029Spjd 469185029Spjd /* 470168404Spjd * Register property callbacks. 471168404Spjd * 472168404Spjd * It would probably be fine to just check for i/o error from 473168404Spjd * the first prop_register(), but I guess I like to go 474168404Spjd * overboard... 475168404Spjd */ 476168404Spjd ds = dmu_objset_ds(os); 477168404Spjd error = dsl_prop_register(ds, "atime", atime_changed_cb, zfsvfs); 478168404Spjd error = error ? error : dsl_prop_register(ds, 479168404Spjd "xattr", xattr_changed_cb, zfsvfs); 480168404Spjd error = error ? error : dsl_prop_register(ds, 481168404Spjd "recordsize", blksz_changed_cb, zfsvfs); 482168404Spjd error = error ? error : dsl_prop_register(ds, 483168404Spjd "readonly", readonly_changed_cb, zfsvfs); 484168404Spjd error = error ? error : dsl_prop_register(ds, 485168404Spjd "setuid", setuid_changed_cb, zfsvfs); 486168404Spjd error = error ? error : dsl_prop_register(ds, 487168404Spjd "exec", exec_changed_cb, zfsvfs); 488168404Spjd error = error ? error : dsl_prop_register(ds, 489168404Spjd "snapdir", snapdir_changed_cb, zfsvfs); 490168404Spjd error = error ? error : dsl_prop_register(ds, 491168404Spjd "aclinherit", acl_inherit_changed_cb, zfsvfs); 492185029Spjd error = error ? error : dsl_prop_register(ds, 493185029Spjd "vscan", vscan_changed_cb, zfsvfs); 494168404Spjd if (error) 495168404Spjd goto unregister; 496168404Spjd 497168404Spjd /* 498168404Spjd * Invoke our callbacks to restore temporary mount options. 499168404Spjd */ 500168404Spjd if (do_readonly) 501168404Spjd readonly_changed_cb(zfsvfs, readonly); 502168404Spjd if (do_setuid) 503168404Spjd setuid_changed_cb(zfsvfs, setuid); 504168404Spjd if (do_exec) 505168404Spjd exec_changed_cb(zfsvfs, exec); 506168404Spjd if (do_xattr) 507168404Spjd xattr_changed_cb(zfsvfs, xattr); 508185029Spjd if (do_atime) 509185029Spjd atime_changed_cb(zfsvfs, atime); 510168404Spjd 511185029Spjd nbmand_changed_cb(zfsvfs, nbmand); 512185029Spjd 513168404Spjd return (0); 514168404Spjd 515168404Spjdunregister: 516168404Spjd /* 517168404Spjd * We may attempt to unregister some callbacks that are not 518168404Spjd * registered, but this is OK; it will simply return ENOMSG, 519168404Spjd * which we will ignore. 520168404Spjd */ 521168404Spjd (void) dsl_prop_unregister(ds, "atime", atime_changed_cb, zfsvfs); 522168404Spjd (void) dsl_prop_unregister(ds, "xattr", xattr_changed_cb, zfsvfs); 523168404Spjd (void) dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, zfsvfs); 524168404Spjd (void) dsl_prop_unregister(ds, "readonly", readonly_changed_cb, zfsvfs); 525168404Spjd (void) dsl_prop_unregister(ds, "setuid", setuid_changed_cb, zfsvfs); 526168404Spjd (void) dsl_prop_unregister(ds, "exec", exec_changed_cb, zfsvfs); 527168404Spjd (void) dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, zfsvfs); 528168404Spjd (void) dsl_prop_unregister(ds, "aclinherit", acl_inherit_changed_cb, 529168404Spjd zfsvfs); 530185029Spjd (void) dsl_prop_unregister(ds, "vscan", vscan_changed_cb, zfsvfs); 531168404Spjd return (error); 532168404Spjd 533168404Spjd} 534168404Spjd 535219089Spjdstatic int 536219089Spjdzfs_space_delta_cb(dmu_object_type_t bonustype, void *data, 537219089Spjd uint64_t *userp, uint64_t *groupp) 538209962Smm{ 539219089Spjd znode_phys_t *znp = data; 540219089Spjd int error = 0; 541209962Smm 542219089Spjd /* 543219089Spjd * Is it a valid type of object to track? 544219089Spjd */ 545219089Spjd if (bonustype != DMU_OT_ZNODE && bonustype != DMU_OT_SA) 546219089Spjd return (ENOENT); 547209962Smm 548219089Spjd /* 549219089Spjd * If we have a NULL data pointer 550219089Spjd * then assume the id's aren't changing and 551219089Spjd * return EEXIST to the dmu to let it know to 552219089Spjd * use the same ids 553219089Spjd */ 554219089Spjd if (data == NULL) 555219089Spjd return (EEXIST); 556209962Smm 557219089Spjd if (bonustype == DMU_OT_ZNODE) { 558219089Spjd *userp = znp->zp_uid; 559219089Spjd *groupp = znp->zp_gid; 560219089Spjd } else { 561219089Spjd int hdrsize; 562209962Smm 563219089Spjd ASSERT(bonustype == DMU_OT_SA); 564219089Spjd hdrsize = sa_hdrsize(data); 565209962Smm 566219089Spjd if (hdrsize != 0) { 567219089Spjd *userp = *((uint64_t *)((uintptr_t)data + hdrsize + 568219089Spjd SA_UID_OFFSET)); 569219089Spjd *groupp = *((uint64_t *)((uintptr_t)data + hdrsize + 570219089Spjd SA_GID_OFFSET)); 571219089Spjd } else { 572219089Spjd /* 573219089Spjd * This should only happen for newly created 574219089Spjd * files that haven't had the znode data filled 575219089Spjd * in yet. 576219089Spjd */ 577219089Spjd *userp = 0; 578219089Spjd *groupp = 0; 579219089Spjd } 580209962Smm } 581219089Spjd return (error); 582209962Smm} 583209962Smm 584209962Smmstatic void 585209962Smmfuidstr_to_sid(zfsvfs_t *zfsvfs, const char *fuidstr, 586209962Smm char *domainbuf, int buflen, uid_t *ridp) 587209962Smm{ 588209962Smm uint64_t fuid; 589209962Smm const char *domain; 590209962Smm 591209962Smm fuid = strtonum(fuidstr, NULL); 592209962Smm 593209962Smm domain = zfs_fuid_find_by_idx(zfsvfs, FUID_INDEX(fuid)); 594209962Smm if (domain) 595209962Smm (void) strlcpy(domainbuf, domain, buflen); 596209962Smm else 597209962Smm domainbuf[0] = '\0'; 598209962Smm *ridp = FUID_RID(fuid); 599209962Smm} 600209962Smm 601209962Smmstatic uint64_t 602209962Smmzfs_userquota_prop_to_obj(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type) 603209962Smm{ 604209962Smm switch (type) { 605209962Smm case ZFS_PROP_USERUSED: 606209962Smm return (DMU_USERUSED_OBJECT); 607209962Smm case ZFS_PROP_GROUPUSED: 608209962Smm return (DMU_GROUPUSED_OBJECT); 609209962Smm case ZFS_PROP_USERQUOTA: 610209962Smm return (zfsvfs->z_userquota_obj); 611209962Smm case ZFS_PROP_GROUPQUOTA: 612209962Smm return (zfsvfs->z_groupquota_obj); 613209962Smm } 614209962Smm return (0); 615209962Smm} 616209962Smm 617209962Smmint 618209962Smmzfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 619209962Smm uint64_t *cookiep, void *vbuf, uint64_t *bufsizep) 620209962Smm{ 621209962Smm int error; 622209962Smm zap_cursor_t zc; 623209962Smm zap_attribute_t za; 624209962Smm zfs_useracct_t *buf = vbuf; 625209962Smm uint64_t obj; 626209962Smm 627209962Smm if (!dmu_objset_userspace_present(zfsvfs->z_os)) 628209962Smm return (ENOTSUP); 629209962Smm 630209962Smm obj = zfs_userquota_prop_to_obj(zfsvfs, type); 631209962Smm if (obj == 0) { 632209962Smm *bufsizep = 0; 633209962Smm return (0); 634209962Smm } 635209962Smm 636209962Smm for (zap_cursor_init_serialized(&zc, zfsvfs->z_os, obj, *cookiep); 637209962Smm (error = zap_cursor_retrieve(&zc, &za)) == 0; 638209962Smm zap_cursor_advance(&zc)) { 639209962Smm if ((uintptr_t)buf - (uintptr_t)vbuf + sizeof (zfs_useracct_t) > 640209962Smm *bufsizep) 641209962Smm break; 642209962Smm 643209962Smm fuidstr_to_sid(zfsvfs, za.za_name, 644209962Smm buf->zu_domain, sizeof (buf->zu_domain), &buf->zu_rid); 645209962Smm 646209962Smm buf->zu_space = za.za_first_integer; 647209962Smm buf++; 648209962Smm } 649209962Smm if (error == ENOENT) 650209962Smm error = 0; 651209962Smm 652209962Smm ASSERT3U((uintptr_t)buf - (uintptr_t)vbuf, <=, *bufsizep); 653209962Smm *bufsizep = (uintptr_t)buf - (uintptr_t)vbuf; 654209962Smm *cookiep = zap_cursor_serialize(&zc); 655209962Smm zap_cursor_fini(&zc); 656209962Smm return (error); 657209962Smm} 658209962Smm 659209962Smm/* 660209962Smm * buf must be big enough (eg, 32 bytes) 661209962Smm */ 662168404Spjdstatic int 663209962Smmid_to_fuidstr(zfsvfs_t *zfsvfs, const char *domain, uid_t rid, 664209962Smm char *buf, boolean_t addok) 665209962Smm{ 666209962Smm uint64_t fuid; 667209962Smm int domainid = 0; 668209962Smm 669209962Smm if (domain && domain[0]) { 670209962Smm domainid = zfs_fuid_find_by_domain(zfsvfs, domain, NULL, addok); 671209962Smm if (domainid == -1) 672209962Smm return (ENOENT); 673209962Smm } 674209962Smm fuid = FUID_ENCODE(domainid, rid); 675209962Smm (void) sprintf(buf, "%llx", (longlong_t)fuid); 676209962Smm return (0); 677209962Smm} 678209962Smm 679209962Smmint 680209962Smmzfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 681209962Smm const char *domain, uint64_t rid, uint64_t *valp) 682209962Smm{ 683209962Smm char buf[32]; 684209962Smm int err; 685209962Smm uint64_t obj; 686209962Smm 687209962Smm *valp = 0; 688209962Smm 689209962Smm if (!dmu_objset_userspace_present(zfsvfs->z_os)) 690209962Smm return (ENOTSUP); 691209962Smm 692209962Smm obj = zfs_userquota_prop_to_obj(zfsvfs, type); 693209962Smm if (obj == 0) 694209962Smm return (0); 695209962Smm 696209962Smm err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_FALSE); 697209962Smm if (err) 698209962Smm return (err); 699209962Smm 700209962Smm err = zap_lookup(zfsvfs->z_os, obj, buf, 8, 1, valp); 701209962Smm if (err == ENOENT) 702209962Smm err = 0; 703209962Smm return (err); 704209962Smm} 705209962Smm 706209962Smmint 707209962Smmzfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 708209962Smm const char *domain, uint64_t rid, uint64_t quota) 709209962Smm{ 710209962Smm char buf[32]; 711209962Smm int err; 712209962Smm dmu_tx_t *tx; 713209962Smm uint64_t *objp; 714209962Smm boolean_t fuid_dirtied; 715209962Smm 716209962Smm if (type != ZFS_PROP_USERQUOTA && type != ZFS_PROP_GROUPQUOTA) 717209962Smm return (EINVAL); 718209962Smm 719209962Smm if (zfsvfs->z_version < ZPL_VERSION_USERSPACE) 720209962Smm return (ENOTSUP); 721209962Smm 722209962Smm objp = (type == ZFS_PROP_USERQUOTA) ? &zfsvfs->z_userquota_obj : 723209962Smm &zfsvfs->z_groupquota_obj; 724209962Smm 725209962Smm err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_TRUE); 726209962Smm if (err) 727209962Smm return (err); 728209962Smm fuid_dirtied = zfsvfs->z_fuid_dirty; 729209962Smm 730209962Smm tx = dmu_tx_create(zfsvfs->z_os); 731209962Smm dmu_tx_hold_zap(tx, *objp ? *objp : DMU_NEW_OBJECT, B_TRUE, NULL); 732209962Smm if (*objp == 0) { 733209962Smm dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE, 734209962Smm zfs_userquota_prop_prefixes[type]); 735209962Smm } 736209962Smm if (fuid_dirtied) 737209962Smm zfs_fuid_txhold(zfsvfs, tx); 738209962Smm err = dmu_tx_assign(tx, TXG_WAIT); 739209962Smm if (err) { 740209962Smm dmu_tx_abort(tx); 741209962Smm return (err); 742209962Smm } 743209962Smm 744209962Smm mutex_enter(&zfsvfs->z_lock); 745209962Smm if (*objp == 0) { 746209962Smm *objp = zap_create(zfsvfs->z_os, DMU_OT_USERGROUP_QUOTA, 747209962Smm DMU_OT_NONE, 0, tx); 748209962Smm VERIFY(0 == zap_add(zfsvfs->z_os, MASTER_NODE_OBJ, 749209962Smm zfs_userquota_prop_prefixes[type], 8, 1, objp, tx)); 750209962Smm } 751209962Smm mutex_exit(&zfsvfs->z_lock); 752209962Smm 753209962Smm if (quota == 0) { 754209962Smm err = zap_remove(zfsvfs->z_os, *objp, buf, tx); 755209962Smm if (err == ENOENT) 756209962Smm err = 0; 757209962Smm } else { 758209962Smm err = zap_update(zfsvfs->z_os, *objp, buf, 8, 1, "a, tx); 759209962Smm } 760209962Smm ASSERT(err == 0); 761209962Smm if (fuid_dirtied) 762209962Smm zfs_fuid_sync(zfsvfs, tx); 763209962Smm dmu_tx_commit(tx); 764209962Smm return (err); 765209962Smm} 766209962Smm 767209962Smmboolean_t 768219089Spjdzfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup, uint64_t fuid) 769209962Smm{ 770209962Smm char buf[32]; 771209962Smm uint64_t used, quota, usedobj, quotaobj; 772209962Smm int err; 773209962Smm 774209962Smm usedobj = isgroup ? DMU_GROUPUSED_OBJECT : DMU_USERUSED_OBJECT; 775209962Smm quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj; 776209962Smm 777209962Smm if (quotaobj == 0 || zfsvfs->z_replay) 778209962Smm return (B_FALSE); 779209962Smm 780209962Smm (void) sprintf(buf, "%llx", (longlong_t)fuid); 781209962Smm err = zap_lookup(zfsvfs->z_os, quotaobj, buf, 8, 1, "a); 782209962Smm if (err != 0) 783209962Smm return (B_FALSE); 784209962Smm 785209962Smm err = zap_lookup(zfsvfs->z_os, usedobj, buf, 8, 1, &used); 786209962Smm if (err != 0) 787209962Smm return (B_FALSE); 788209962Smm return (used >= quota); 789209962Smm} 790209962Smm 791219089Spjdboolean_t 792219089Spjdzfs_owner_overquota(zfsvfs_t *zfsvfs, znode_t *zp, boolean_t isgroup) 793219089Spjd{ 794219089Spjd uint64_t fuid; 795219089Spjd uint64_t quotaobj; 796219089Spjd 797219089Spjd quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj; 798219089Spjd 799219089Spjd fuid = isgroup ? zp->z_gid : zp->z_uid; 800219089Spjd 801219089Spjd if (quotaobj == 0 || zfsvfs->z_replay) 802219089Spjd return (B_FALSE); 803219089Spjd 804219089Spjd return (zfs_fuid_overquota(zfsvfs, isgroup, fuid)); 805219089Spjd} 806219089Spjd 807209962Smmint 808219089Spjdzfsvfs_create(const char *osname, zfsvfs_t **zfvp) 809209962Smm{ 810209962Smm objset_t *os; 811209962Smm zfsvfs_t *zfsvfs; 812209962Smm uint64_t zval; 813209962Smm int i, error; 814219089Spjd uint64_t sa_obj; 815209962Smm 816219089Spjd zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); 817219089Spjd 818219089Spjd /* 819219089Spjd * We claim to always be readonly so we can open snapshots; 820219089Spjd * other ZPL code will prevent us from writing to snapshots. 821219089Spjd */ 822219089Spjd error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zfsvfs, &os); 823219089Spjd if (error) { 824219089Spjd kmem_free(zfsvfs, sizeof (zfsvfs_t)); 825209962Smm return (error); 826209962Smm } 827209962Smm 828209962Smm /* 829209962Smm * Initialize the zfs-specific filesystem structure. 830209962Smm * Should probably make this a kmem cache, shuffle fields, 831209962Smm * and just bzero up to z_hold_mtx[]. 832209962Smm */ 833209962Smm zfsvfs->z_vfs = NULL; 834209962Smm zfsvfs->z_parent = zfsvfs; 835209962Smm zfsvfs->z_max_blksz = SPA_MAXBLOCKSIZE; 836209962Smm zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE; 837209962Smm zfsvfs->z_os = os; 838209962Smm 839209962Smm error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version); 840209962Smm if (error) { 841209962Smm goto out; 842219089Spjd } else if (zfsvfs->z_version > 843219089Spjd zfs_zpl_version_map(spa_version(dmu_objset_spa(os)))) { 844219089Spjd (void) printf("Can't mount a version %lld file system " 845219089Spjd "on a version %lld pool\n. Pool must be upgraded to mount " 846219089Spjd "this file system.", (u_longlong_t)zfsvfs->z_version, 847219089Spjd (u_longlong_t)spa_version(dmu_objset_spa(os))); 848209962Smm error = ENOTSUP; 849209962Smm goto out; 850209962Smm } 851209962Smm if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0) 852209962Smm goto out; 853209962Smm zfsvfs->z_norm = (int)zval; 854209962Smm 855209962Smm if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0) 856209962Smm goto out; 857209962Smm zfsvfs->z_utf8 = (zval != 0); 858209962Smm 859209962Smm if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0) 860209962Smm goto out; 861209962Smm zfsvfs->z_case = (uint_t)zval; 862209962Smm 863209962Smm /* 864209962Smm * Fold case on file systems that are always or sometimes case 865209962Smm * insensitive. 866209962Smm */ 867209962Smm if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE || 868209962Smm zfsvfs->z_case == ZFS_CASE_MIXED) 869209962Smm zfsvfs->z_norm |= U8_TEXTPREP_TOUPPER; 870209962Smm 871209962Smm zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); 872219089Spjd zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); 873209962Smm 874219089Spjd if (zfsvfs->z_use_sa) { 875219089Spjd /* should either have both of these objects or none */ 876219089Spjd error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, 877219089Spjd &sa_obj); 878219089Spjd if (error) 879219089Spjd return (error); 880219089Spjd } else { 881219089Spjd /* 882219089Spjd * Pre SA versions file systems should never touch 883219089Spjd * either the attribute registration or layout objects. 884219089Spjd */ 885219089Spjd sa_obj = 0; 886219089Spjd } 887219089Spjd 888219089Spjd error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END, 889219089Spjd &zfsvfs->z_attr_table); 890219089Spjd if (error) 891219089Spjd goto out; 892219089Spjd 893219089Spjd if (zfsvfs->z_version >= ZPL_VERSION_SA) 894219089Spjd sa_register_update_callback(os, zfs_sa_upgrade); 895219089Spjd 896209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, 897209962Smm &zfsvfs->z_root); 898209962Smm if (error) 899209962Smm goto out; 900209962Smm ASSERT(zfsvfs->z_root != 0); 901209962Smm 902209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1, 903209962Smm &zfsvfs->z_unlinkedobj); 904209962Smm if (error) 905209962Smm goto out; 906209962Smm 907209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, 908209962Smm zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA], 909209962Smm 8, 1, &zfsvfs->z_userquota_obj); 910209962Smm if (error && error != ENOENT) 911209962Smm goto out; 912209962Smm 913209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, 914209962Smm zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA], 915209962Smm 8, 1, &zfsvfs->z_groupquota_obj); 916209962Smm if (error && error != ENOENT) 917209962Smm goto out; 918209962Smm 919209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1, 920209962Smm &zfsvfs->z_fuid_obj); 921209962Smm if (error && error != ENOENT) 922209962Smm goto out; 923209962Smm 924209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1, 925209962Smm &zfsvfs->z_shares_dir); 926209962Smm if (error && error != ENOENT) 927209962Smm goto out; 928209962Smm 929209962Smm mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); 930209962Smm mutex_init(&zfsvfs->z_lock, NULL, MUTEX_DEFAULT, NULL); 931209962Smm list_create(&zfsvfs->z_all_znodes, sizeof (znode_t), 932209962Smm offsetof(znode_t, z_link_node)); 933209962Smm rrw_init(&zfsvfs->z_teardown_lock); 934209962Smm rw_init(&zfsvfs->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL); 935209962Smm rw_init(&zfsvfs->z_fuid_lock, NULL, RW_DEFAULT, NULL); 936209962Smm for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 937209962Smm mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); 938209962Smm 939219089Spjd *zfvp = zfsvfs; 940209962Smm return (0); 941209962Smm 942209962Smmout: 943219089Spjd dmu_objset_disown(os, zfsvfs); 944219089Spjd *zfvp = NULL; 945209962Smm kmem_free(zfsvfs, sizeof (zfsvfs_t)); 946209962Smm return (error); 947209962Smm} 948209962Smm 949209962Smmstatic int 950185029Spjdzfsvfs_setup(zfsvfs_t *zfsvfs, boolean_t mounting) 951168404Spjd{ 952185029Spjd int error; 953185029Spjd 954185029Spjd error = zfs_register_callbacks(zfsvfs->z_vfs); 955185029Spjd if (error) 956185029Spjd return (error); 957185029Spjd 958185029Spjd /* 959185029Spjd * Set the objset user_ptr to track its zfsvfs. 960185029Spjd */ 961219089Spjd mutex_enter(&zfsvfs->z_os->os_user_ptr_lock); 962185029Spjd dmu_objset_set_user(zfsvfs->z_os, zfsvfs); 963219089Spjd mutex_exit(&zfsvfs->z_os->os_user_ptr_lock); 964185029Spjd 965208689Smm zfsvfs->z_log = zil_open(zfsvfs->z_os, zfs_get_data); 966208689Smm 967185029Spjd /* 968185029Spjd * If we are not mounting (ie: online recv), then we don't 969185029Spjd * have to worry about replaying the log as we blocked all 970185029Spjd * operations out since we closed the ZIL. 971185029Spjd */ 972185029Spjd if (mounting) { 973185029Spjd boolean_t readonly; 974185029Spjd 975185029Spjd /* 976185029Spjd * During replay we remove the read only flag to 977185029Spjd * allow replays to succeed. 978185029Spjd */ 979185029Spjd readonly = zfsvfs->z_vfs->vfs_flag & VFS_RDONLY; 980208689Smm if (readonly != 0) 981208689Smm zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; 982208689Smm else 983208689Smm zfs_unlinked_drain(zfsvfs); 984185029Spjd 985219089Spjd /* 986219089Spjd * Parse and replay the intent log. 987219089Spjd * 988219089Spjd * Because of ziltest, this must be done after 989219089Spjd * zfs_unlinked_drain(). (Further note: ziltest 990219089Spjd * doesn't use readonly mounts, where 991219089Spjd * zfs_unlinked_drain() isn't called.) This is because 992219089Spjd * ziltest causes spa_sync() to think it's committed, 993219089Spjd * but actually it is not, so the intent log contains 994219089Spjd * many txg's worth of changes. 995219089Spjd * 996219089Spjd * In particular, if object N is in the unlinked set in 997219089Spjd * the last txg to actually sync, then it could be 998219089Spjd * actually freed in a later txg and then reallocated 999219089Spjd * in a yet later txg. This would write a "create 1000219089Spjd * object N" record to the intent log. Normally, this 1001219089Spjd * would be fine because the spa_sync() would have 1002219089Spjd * written out the fact that object N is free, before 1003219089Spjd * we could write the "create object N" intent log 1004219089Spjd * record. 1005219089Spjd * 1006219089Spjd * But when we are in ziltest mode, we advance the "open 1007219089Spjd * txg" without actually spa_sync()-ing the changes to 1008219089Spjd * disk. So we would see that object N is still 1009219089Spjd * allocated and in the unlinked set, and there is an 1010219089Spjd * intent log record saying to allocate it. 1011219089Spjd */ 1012219089Spjd if (spa_writeable(dmu_objset_spa(zfsvfs->z_os))) { 1013219089Spjd if (zil_replay_disable) { 1014219089Spjd zil_destroy(zfsvfs->z_log, B_FALSE); 1015219089Spjd } else { 1016219089Spjd zfsvfs->z_replay = B_TRUE; 1017219089Spjd zil_replay(zfsvfs->z_os, zfsvfs, 1018219089Spjd zfs_replay_vector); 1019219089Spjd zfsvfs->z_replay = B_FALSE; 1020219089Spjd } 1021208689Smm } 1022185029Spjd zfsvfs->z_vfs->vfs_flag |= readonly; /* restore readonly bit */ 1023185029Spjd } 1024185029Spjd 1025185029Spjd return (0); 1026185029Spjd} 1027185029Spjd 1028210470Smmextern krwlock_t zfsvfs_lock; /* in zfs_znode.c */ 1029210470Smm 1030209962Smmvoid 1031209962Smmzfsvfs_free(zfsvfs_t *zfsvfs) 1032185029Spjd{ 1033209962Smm int i; 1034209962Smm 1035210470Smm /* 1036210470Smm * This is a barrier to prevent the filesystem from going away in 1037210470Smm * zfs_znode_move() until we can safely ensure that the filesystem is 1038210470Smm * not unmounted. We consider the filesystem valid before the barrier 1039210470Smm * and invalid after the barrier. 1040210470Smm */ 1041210470Smm rw_enter(&zfsvfs_lock, RW_READER); 1042210470Smm rw_exit(&zfsvfs_lock); 1043210470Smm 1044209962Smm zfs_fuid_destroy(zfsvfs); 1045209962Smm 1046185029Spjd mutex_destroy(&zfsvfs->z_znodes_lock); 1047209962Smm mutex_destroy(&zfsvfs->z_lock); 1048185029Spjd list_destroy(&zfsvfs->z_all_znodes); 1049185029Spjd rrw_destroy(&zfsvfs->z_teardown_lock); 1050185029Spjd rw_destroy(&zfsvfs->z_teardown_inactive_lock); 1051185029Spjd rw_destroy(&zfsvfs->z_fuid_lock); 1052209962Smm for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 1053209962Smm mutex_destroy(&zfsvfs->z_hold_mtx[i]); 1054185029Spjd kmem_free(zfsvfs, sizeof (zfsvfs_t)); 1055185029Spjd} 1056185029Spjd 1057209962Smmstatic void 1058209962Smmzfs_set_fuid_feature(zfsvfs_t *zfsvfs) 1059209962Smm{ 1060209962Smm zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); 1061219089Spjd if (zfsvfs->z_vfs) { 1062219089Spjd if (zfsvfs->z_use_fuids) { 1063219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_XVATTR); 1064219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_SYSATTR_VIEWS); 1065219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACEMASKONACCESS); 1066219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACLONCREATE); 1067219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACCESS_FILTER); 1068219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_REPARSE); 1069219089Spjd } else { 1070219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_XVATTR); 1071219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_SYSATTR_VIEWS); 1072219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACEMASKONACCESS); 1073219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACLONCREATE); 1074219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACCESS_FILTER); 1075219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_REPARSE); 1076219089Spjd } 1077209962Smm } 1078219089Spjd zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); 1079209962Smm} 1080209962Smm 1081185029Spjdstatic int 1082185029Spjdzfs_domount(vfs_t *vfsp, char *osname) 1083185029Spjd{ 1084209962Smm uint64_t recordsize, fsid_guid; 1085168404Spjd int error = 0; 1086168404Spjd zfsvfs_t *zfsvfs; 1087209962Smm vnode_t *vp; 1088168404Spjd 1089168404Spjd ASSERT(vfsp); 1090168404Spjd ASSERT(osname); 1091168404Spjd 1092219089Spjd error = zfsvfs_create(osname, &zfsvfs); 1093209962Smm if (error) 1094209962Smm return (error); 1095168404Spjd zfsvfs->z_vfs = vfsp; 1096168404Spjd 1097168404Spjd if (error = dsl_prop_get_integer(osname, "recordsize", &recordsize, 1098168404Spjd NULL)) 1099168404Spjd goto out; 1100204101Spjd zfsvfs->z_vfs->vfs_bsize = SPA_MINBLOCKSIZE; 1101204101Spjd zfsvfs->z_vfs->mnt_stat.f_iosize = recordsize; 1102168404Spjd 1103168404Spjd vfsp->vfs_data = zfsvfs; 1104218386Strasz vfsp->mnt_flag |= MNT_LOCAL; 1105168404Spjd vfsp->mnt_kern_flag |= MNTK_MPSAFE; 1106168404Spjd vfsp->mnt_kern_flag |= MNTK_LOOKUP_SHARED; 1107193440Sps vfsp->mnt_kern_flag |= MNTK_SHARED_WRITES; 1108168404Spjd 1109209962Smm /* 1110209962Smm * The fsid is 64 bits, composed of an 8-bit fs type, which 1111209962Smm * separates our fsid from any other filesystem types, and a 1112209962Smm * 56-bit objset unique ID. The objset unique ID is unique to 1113209962Smm * all objsets open on this system, provided by unique_create(). 1114209962Smm * The 8-bit fs type must be put in the low bits of fsid[1] 1115209962Smm * because that's where other Solaris filesystems put it. 1116209962Smm */ 1117209962Smm fsid_guid = dmu_objset_fsid_guid(zfsvfs->z_os); 1118209962Smm ASSERT((fsid_guid & ~((1ULL<<56)-1)) == 0); 1119209962Smm vfsp->vfs_fsid.val[0] = fsid_guid; 1120209962Smm vfsp->vfs_fsid.val[1] = ((fsid_guid>>32) << 8) | 1121209962Smm vfsp->mnt_vfc->vfc_typenum & 0xFF; 1122168404Spjd 1123185029Spjd /* 1124185029Spjd * Set features for file system. 1125185029Spjd */ 1126209962Smm zfs_set_fuid_feature(zfsvfs); 1127185029Spjd if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE) { 1128185029Spjd vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); 1129185029Spjd vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); 1130185029Spjd vfs_set_feature(vfsp, VFSFT_NOCASESENSITIVE); 1131185029Spjd } else if (zfsvfs->z_case == ZFS_CASE_MIXED) { 1132185029Spjd vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); 1133185029Spjd vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); 1134185029Spjd } 1135219089Spjd vfs_set_feature(vfsp, VFSFT_ZEROCOPY_SUPPORTED); 1136185029Spjd 1137168404Spjd if (dmu_objset_is_snapshot(zfsvfs->z_os)) { 1138185029Spjd uint64_t pval; 1139168404Spjd 1140168404Spjd atime_changed_cb(zfsvfs, B_FALSE); 1141168404Spjd readonly_changed_cb(zfsvfs, B_TRUE); 1142185029Spjd if (error = dsl_prop_get_integer(osname, "xattr", &pval, NULL)) 1143168404Spjd goto out; 1144185029Spjd xattr_changed_cb(zfsvfs, pval); 1145168404Spjd zfsvfs->z_issnap = B_TRUE; 1146219089Spjd zfsvfs->z_os->os_sync = ZFS_SYNC_DISABLED; 1147209962Smm 1148219089Spjd mutex_enter(&zfsvfs->z_os->os_user_ptr_lock); 1149209962Smm dmu_objset_set_user(zfsvfs->z_os, zfsvfs); 1150219089Spjd mutex_exit(&zfsvfs->z_os->os_user_ptr_lock); 1151168404Spjd } else { 1152185029Spjd error = zfsvfs_setup(zfsvfs, B_TRUE); 1153168404Spjd } 1154168404Spjd 1155168404Spjd vfs_mountedfrom(vfsp, osname); 1156209962Smm /* Grab extra reference. */ 1157209962Smm VERIFY(VFS_ROOT(vfsp, LK_EXCLUSIVE, &vp) == 0); 1158209962Smm VOP_UNLOCK(vp, 0); 1159168404Spjd 1160168404Spjd if (!zfsvfs->z_issnap) 1161168404Spjd zfsctl_create(zfsvfs); 1162168404Spjdout: 1163168404Spjd if (error) { 1164219089Spjd dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1165209962Smm zfsvfs_free(zfsvfs); 1166168404Spjd } else { 1167168404Spjd atomic_add_32(&zfs_active_fs_count, 1); 1168168404Spjd } 1169168404Spjd 1170168404Spjd return (error); 1171168404Spjd} 1172168404Spjd 1173168404Spjdvoid 1174168404Spjdzfs_unregister_callbacks(zfsvfs_t *zfsvfs) 1175168404Spjd{ 1176168404Spjd objset_t *os = zfsvfs->z_os; 1177168404Spjd struct dsl_dataset *ds; 1178168404Spjd 1179168404Spjd /* 1180168404Spjd * Unregister properties. 1181168404Spjd */ 1182168404Spjd if (!dmu_objset_is_snapshot(os)) { 1183168404Spjd ds = dmu_objset_ds(os); 1184168404Spjd VERIFY(dsl_prop_unregister(ds, "atime", atime_changed_cb, 1185168404Spjd zfsvfs) == 0); 1186168404Spjd 1187168404Spjd VERIFY(dsl_prop_unregister(ds, "xattr", xattr_changed_cb, 1188168404Spjd zfsvfs) == 0); 1189168404Spjd 1190168404Spjd VERIFY(dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, 1191168404Spjd zfsvfs) == 0); 1192168404Spjd 1193168404Spjd VERIFY(dsl_prop_unregister(ds, "readonly", readonly_changed_cb, 1194168404Spjd zfsvfs) == 0); 1195168404Spjd 1196168404Spjd VERIFY(dsl_prop_unregister(ds, "setuid", setuid_changed_cb, 1197168404Spjd zfsvfs) == 0); 1198168404Spjd 1199168404Spjd VERIFY(dsl_prop_unregister(ds, "exec", exec_changed_cb, 1200168404Spjd zfsvfs) == 0); 1201168404Spjd 1202168404Spjd VERIFY(dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, 1203168404Spjd zfsvfs) == 0); 1204168404Spjd 1205168404Spjd VERIFY(dsl_prop_unregister(ds, "aclinherit", 1206168404Spjd acl_inherit_changed_cb, zfsvfs) == 0); 1207185029Spjd 1208185029Spjd VERIFY(dsl_prop_unregister(ds, "vscan", 1209185029Spjd vscan_changed_cb, zfsvfs) == 0); 1210168404Spjd } 1211168404Spjd} 1212168404Spjd 1213219089Spjd#ifdef SECLABEL 1214219089Spjd/* 1215219089Spjd * Convert a decimal digit string to a uint64_t integer. 1216219089Spjd */ 1217219089Spjdstatic int 1218219089Spjdstr_to_uint64(char *str, uint64_t *objnum) 1219219089Spjd{ 1220219089Spjd uint64_t num = 0; 1221219089Spjd 1222219089Spjd while (*str) { 1223219089Spjd if (*str < '0' || *str > '9') 1224219089Spjd return (EINVAL); 1225219089Spjd 1226219089Spjd num = num*10 + *str++ - '0'; 1227219089Spjd } 1228219089Spjd 1229219089Spjd *objnum = num; 1230219089Spjd return (0); 1231219089Spjd} 1232219089Spjd 1233219089Spjd/* 1234219089Spjd * The boot path passed from the boot loader is in the form of 1235219089Spjd * "rootpool-name/root-filesystem-object-number'. Convert this 1236219089Spjd * string to a dataset name: "rootpool-name/root-filesystem-name". 1237219089Spjd */ 1238219089Spjdstatic int 1239219089Spjdzfs_parse_bootfs(char *bpath, char *outpath) 1240219089Spjd{ 1241219089Spjd char *slashp; 1242219089Spjd uint64_t objnum; 1243219089Spjd int error; 1244219089Spjd 1245219089Spjd if (*bpath == 0 || *bpath == '/') 1246219089Spjd return (EINVAL); 1247219089Spjd 1248219089Spjd (void) strcpy(outpath, bpath); 1249219089Spjd 1250219089Spjd slashp = strchr(bpath, '/'); 1251219089Spjd 1252219089Spjd /* if no '/', just return the pool name */ 1253219089Spjd if (slashp == NULL) { 1254219089Spjd return (0); 1255219089Spjd } 1256219089Spjd 1257219089Spjd /* if not a number, just return the root dataset name */ 1258219089Spjd if (str_to_uint64(slashp+1, &objnum)) { 1259219089Spjd return (0); 1260219089Spjd } 1261219089Spjd 1262219089Spjd *slashp = '\0'; 1263219089Spjd error = dsl_dsobj_to_dsname(bpath, objnum, outpath); 1264219089Spjd *slashp = '/'; 1265219089Spjd 1266219089Spjd return (error); 1267219089Spjd} 1268219089Spjd 1269219089Spjd/* 1270219089Spjd * zfs_check_global_label: 1271219089Spjd * Check that the hex label string is appropriate for the dataset 1272219089Spjd * being mounted into the global_zone proper. 1273219089Spjd * 1274219089Spjd * Return an error if the hex label string is not default or 1275219089Spjd * admin_low/admin_high. For admin_low labels, the corresponding 1276219089Spjd * dataset must be readonly. 1277219089Spjd */ 1278219089Spjdint 1279219089Spjdzfs_check_global_label(const char *dsname, const char *hexsl) 1280219089Spjd{ 1281219089Spjd if (strcasecmp(hexsl, ZFS_MLSLABEL_DEFAULT) == 0) 1282219089Spjd return (0); 1283219089Spjd if (strcasecmp(hexsl, ADMIN_HIGH) == 0) 1284219089Spjd return (0); 1285219089Spjd if (strcasecmp(hexsl, ADMIN_LOW) == 0) { 1286219089Spjd /* must be readonly */ 1287219089Spjd uint64_t rdonly; 1288219089Spjd 1289219089Spjd if (dsl_prop_get_integer(dsname, 1290219089Spjd zfs_prop_to_name(ZFS_PROP_READONLY), &rdonly, NULL)) 1291219089Spjd return (EACCES); 1292219089Spjd return (rdonly ? 0 : EACCES); 1293219089Spjd } 1294219089Spjd return (EACCES); 1295219089Spjd} 1296219089Spjd 1297219089Spjd/* 1298219089Spjd * zfs_mount_label_policy: 1299219089Spjd * Determine whether the mount is allowed according to MAC check. 1300219089Spjd * by comparing (where appropriate) label of the dataset against 1301219089Spjd * the label of the zone being mounted into. If the dataset has 1302219089Spjd * no label, create one. 1303219089Spjd * 1304219089Spjd * Returns: 1305219089Spjd * 0 : access allowed 1306219089Spjd * >0 : error code, such as EACCES 1307219089Spjd */ 1308219089Spjdstatic int 1309219089Spjdzfs_mount_label_policy(vfs_t *vfsp, char *osname) 1310219089Spjd{ 1311219089Spjd int error, retv; 1312219089Spjd zone_t *mntzone = NULL; 1313219089Spjd ts_label_t *mnt_tsl; 1314219089Spjd bslabel_t *mnt_sl; 1315219089Spjd bslabel_t ds_sl; 1316219089Spjd char ds_hexsl[MAXNAMELEN]; 1317219089Spjd 1318219089Spjd retv = EACCES; /* assume the worst */ 1319219089Spjd 1320219089Spjd /* 1321219089Spjd * Start by getting the dataset label if it exists. 1322219089Spjd */ 1323219089Spjd error = dsl_prop_get(osname, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 1324219089Spjd 1, sizeof (ds_hexsl), &ds_hexsl, NULL); 1325219089Spjd if (error) 1326219089Spjd return (EACCES); 1327219089Spjd 1328219089Spjd /* 1329219089Spjd * If labeling is NOT enabled, then disallow the mount of datasets 1330219089Spjd * which have a non-default label already. No other label checks 1331219089Spjd * are needed. 1332219089Spjd */ 1333219089Spjd if (!is_system_labeled()) { 1334219089Spjd if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0) 1335219089Spjd return (0); 1336219089Spjd return (EACCES); 1337219089Spjd } 1338219089Spjd 1339219089Spjd /* 1340219089Spjd * Get the label of the mountpoint. If mounting into the global 1341219089Spjd * zone (i.e. mountpoint is not within an active zone and the 1342219089Spjd * zoned property is off), the label must be default or 1343219089Spjd * admin_low/admin_high only; no other checks are needed. 1344219089Spjd */ 1345219089Spjd mntzone = zone_find_by_any_path(refstr_value(vfsp->vfs_mntpt), B_FALSE); 1346219089Spjd if (mntzone->zone_id == GLOBAL_ZONEID) { 1347219089Spjd uint64_t zoned; 1348219089Spjd 1349219089Spjd zone_rele(mntzone); 1350219089Spjd 1351219089Spjd if (dsl_prop_get_integer(osname, 1352219089Spjd zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) 1353219089Spjd return (EACCES); 1354219089Spjd if (!zoned) 1355219089Spjd return (zfs_check_global_label(osname, ds_hexsl)); 1356219089Spjd else 1357219089Spjd /* 1358219089Spjd * This is the case of a zone dataset being mounted 1359219089Spjd * initially, before the zone has been fully created; 1360219089Spjd * allow this mount into global zone. 1361219089Spjd */ 1362219089Spjd return (0); 1363219089Spjd } 1364219089Spjd 1365219089Spjd mnt_tsl = mntzone->zone_slabel; 1366219089Spjd ASSERT(mnt_tsl != NULL); 1367219089Spjd label_hold(mnt_tsl); 1368219089Spjd mnt_sl = label2bslabel(mnt_tsl); 1369219089Spjd 1370219089Spjd if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0) { 1371219089Spjd /* 1372219089Spjd * The dataset doesn't have a real label, so fabricate one. 1373219089Spjd */ 1374219089Spjd char *str = NULL; 1375219089Spjd 1376219089Spjd if (l_to_str_internal(mnt_sl, &str) == 0 && 1377219089Spjd dsl_prop_set(osname, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 1378219089Spjd ZPROP_SRC_LOCAL, 1, strlen(str) + 1, str) == 0) 1379219089Spjd retv = 0; 1380219089Spjd if (str != NULL) 1381219089Spjd kmem_free(str, strlen(str) + 1); 1382219089Spjd } else if (hexstr_to_label(ds_hexsl, &ds_sl) == 0) { 1383219089Spjd /* 1384219089Spjd * Now compare labels to complete the MAC check. If the 1385219089Spjd * labels are equal then allow access. If the mountpoint 1386219089Spjd * label dominates the dataset label, allow readonly access. 1387219089Spjd * Otherwise, access is denied. 1388219089Spjd */ 1389219089Spjd if (blequal(mnt_sl, &ds_sl)) 1390219089Spjd retv = 0; 1391219089Spjd else if (bldominates(mnt_sl, &ds_sl)) { 1392219089Spjd vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0); 1393219089Spjd retv = 0; 1394219089Spjd } 1395219089Spjd } 1396219089Spjd 1397219089Spjd label_rele(mnt_tsl); 1398219089Spjd zone_rele(mntzone); 1399219089Spjd return (retv); 1400219089Spjd} 1401219089Spjd#endif /* SECLABEL */ 1402219089Spjd 1403219089Spjd#ifdef OPENSOLARIS_MOUNTROOT 1404219089Spjdstatic int 1405219089Spjdzfs_mountroot(vfs_t *vfsp, enum whymountroot why) 1406219089Spjd{ 1407219089Spjd int error = 0; 1408219089Spjd static int zfsrootdone = 0; 1409219089Spjd zfsvfs_t *zfsvfs = NULL; 1410219089Spjd znode_t *zp = NULL; 1411219089Spjd vnode_t *vp = NULL; 1412219089Spjd char *zfs_bootfs; 1413219089Spjd char *zfs_devid; 1414219089Spjd 1415219089Spjd ASSERT(vfsp); 1416219089Spjd 1417219089Spjd /* 1418219089Spjd * The filesystem that we mount as root is defined in the 1419219089Spjd * boot property "zfs-bootfs" with a format of 1420219089Spjd * "poolname/root-dataset-objnum". 1421219089Spjd */ 1422219089Spjd if (why == ROOT_INIT) { 1423219089Spjd if (zfsrootdone++) 1424219089Spjd return (EBUSY); 1425219089Spjd /* 1426219089Spjd * the process of doing a spa_load will require the 1427219089Spjd * clock to be set before we could (for example) do 1428219089Spjd * something better by looking at the timestamp on 1429219089Spjd * an uberblock, so just set it to -1. 1430219089Spjd */ 1431219089Spjd clkset(-1); 1432219089Spjd 1433219089Spjd if ((zfs_bootfs = spa_get_bootprop("zfs-bootfs")) == NULL) { 1434219089Spjd cmn_err(CE_NOTE, "spa_get_bootfs: can not get " 1435219089Spjd "bootfs name"); 1436219089Spjd return (EINVAL); 1437219089Spjd } 1438219089Spjd zfs_devid = spa_get_bootprop("diskdevid"); 1439219089Spjd error = spa_import_rootpool(rootfs.bo_name, zfs_devid); 1440219089Spjd if (zfs_devid) 1441219089Spjd spa_free_bootprop(zfs_devid); 1442219089Spjd if (error) { 1443219089Spjd spa_free_bootprop(zfs_bootfs); 1444219089Spjd cmn_err(CE_NOTE, "spa_import_rootpool: error %d", 1445219089Spjd error); 1446219089Spjd return (error); 1447219089Spjd } 1448219089Spjd if (error = zfs_parse_bootfs(zfs_bootfs, rootfs.bo_name)) { 1449219089Spjd spa_free_bootprop(zfs_bootfs); 1450219089Spjd cmn_err(CE_NOTE, "zfs_parse_bootfs: error %d", 1451219089Spjd error); 1452219089Spjd return (error); 1453219089Spjd } 1454219089Spjd 1455219089Spjd spa_free_bootprop(zfs_bootfs); 1456219089Spjd 1457219089Spjd if (error = vfs_lock(vfsp)) 1458219089Spjd return (error); 1459219089Spjd 1460219089Spjd if (error = zfs_domount(vfsp, rootfs.bo_name)) { 1461219089Spjd cmn_err(CE_NOTE, "zfs_domount: error %d", error); 1462219089Spjd goto out; 1463219089Spjd } 1464219089Spjd 1465219089Spjd zfsvfs = (zfsvfs_t *)vfsp->vfs_data; 1466219089Spjd ASSERT(zfsvfs); 1467219089Spjd if (error = zfs_zget(zfsvfs, zfsvfs->z_root, &zp)) { 1468219089Spjd cmn_err(CE_NOTE, "zfs_zget: error %d", error); 1469219089Spjd goto out; 1470219089Spjd } 1471219089Spjd 1472219089Spjd vp = ZTOV(zp); 1473219089Spjd mutex_enter(&vp->v_lock); 1474219089Spjd vp->v_flag |= VROOT; 1475219089Spjd mutex_exit(&vp->v_lock); 1476219089Spjd rootvp = vp; 1477219089Spjd 1478219089Spjd /* 1479219089Spjd * Leave rootvp held. The root file system is never unmounted. 1480219089Spjd */ 1481219089Spjd 1482219089Spjd vfs_add((struct vnode *)0, vfsp, 1483219089Spjd (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); 1484219089Spjdout: 1485219089Spjd vfs_unlock(vfsp); 1486219089Spjd return (error); 1487219089Spjd } else if (why == ROOT_REMOUNT) { 1488219089Spjd readonly_changed_cb(vfsp->vfs_data, B_FALSE); 1489219089Spjd vfsp->vfs_flag |= VFS_REMOUNT; 1490219089Spjd 1491219089Spjd /* refresh mount options */ 1492219089Spjd zfs_unregister_callbacks(vfsp->vfs_data); 1493219089Spjd return (zfs_register_callbacks(vfsp)); 1494219089Spjd 1495219089Spjd } else if (why == ROOT_UNMOUNT) { 1496219089Spjd zfs_unregister_callbacks((zfsvfs_t *)vfsp->vfs_data); 1497219089Spjd (void) zfs_sync(vfsp, 0, 0); 1498219089Spjd return (0); 1499219089Spjd } 1500219089Spjd 1501219089Spjd /* 1502219089Spjd * if "why" is equal to anything else other than ROOT_INIT, 1503219089Spjd * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it. 1504219089Spjd */ 1505219089Spjd return (ENOTSUP); 1506219089Spjd} 1507219089Spjd#endif /* OPENSOLARIS_MOUNTROOT */ 1508219089Spjd 1509168404Spjd/*ARGSUSED*/ 1510168404Spjdstatic int 1511191990Sattiliozfs_mount(vfs_t *vfsp) 1512168404Spjd{ 1513191990Sattilio kthread_t *td = curthread; 1514185029Spjd vnode_t *mvp = vfsp->mnt_vnodecovered; 1515185029Spjd cred_t *cr = td->td_ucred; 1516185029Spjd char *osname; 1517185029Spjd int error = 0; 1518185029Spjd int canwrite; 1519168404Spjd 1520185029Spjd if (vfs_getopt(vfsp->mnt_optnew, "from", (void **)&osname, NULL)) 1521185029Spjd return (EINVAL); 1522185029Spjd 1523168404Spjd /* 1524185029Spjd * If full-owner-access is enabled and delegated administration is 1525185029Spjd * turned on, we must set nosuid. 1526185029Spjd */ 1527185029Spjd if (zfs_super_owner && 1528185029Spjd dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr) != ECANCELED) { 1529185029Spjd secpolicy_fs_mount_clearopts(cr, vfsp); 1530185029Spjd } 1531185029Spjd 1532185029Spjd /* 1533185029Spjd * Check for mount privilege? 1534185029Spjd * 1535185029Spjd * If we don't have privilege then see if 1536185029Spjd * we have local permission to allow it 1537185029Spjd */ 1538185029Spjd error = secpolicy_fs_mount(cr, mvp, vfsp); 1539185029Spjd if (error) { 1540212694Smm if (dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr) != 0) 1541196944Spjd goto out; 1542196944Spjd 1543196944Spjd if (!(vfsp->vfs_flag & MS_REMOUNT)) { 1544185029Spjd vattr_t vattr; 1545185029Spjd 1546185029Spjd /* 1547185029Spjd * Make sure user is the owner of the mount point 1548185029Spjd * or has sufficient privileges. 1549185029Spjd */ 1550185029Spjd 1551185029Spjd vattr.va_mask = AT_UID; 1552185029Spjd 1553196662Spjd vn_lock(mvp, LK_SHARED | LK_RETRY); 1554212694Smm if (VOP_GETATTR(mvp, &vattr, cr)) { 1555196662Spjd VOP_UNLOCK(mvp, 0); 1556185029Spjd goto out; 1557185029Spjd } 1558185029Spjd 1559185029Spjd if (secpolicy_vnode_owner(mvp, cr, vattr.va_uid) != 0 && 1560185029Spjd VOP_ACCESS(mvp, VWRITE, cr, td) != 0) { 1561196662Spjd VOP_UNLOCK(mvp, 0); 1562185029Spjd goto out; 1563185029Spjd } 1564196662Spjd VOP_UNLOCK(mvp, 0); 1565196944Spjd } 1566185029Spjd 1567196944Spjd secpolicy_fs_mount_clearopts(cr, vfsp); 1568185029Spjd } 1569185029Spjd 1570185029Spjd /* 1571185029Spjd * Refuse to mount a filesystem if we are in a local zone and the 1572185029Spjd * dataset is not visible. 1573185029Spjd */ 1574185029Spjd if (!INGLOBALZONE(curthread) && 1575185029Spjd (!zone_dataset_visible(osname, &canwrite) || !canwrite)) { 1576185029Spjd error = EPERM; 1577185029Spjd goto out; 1578185029Spjd } 1579185029Spjd 1580219089Spjd#ifdef SECLABEL 1581219089Spjd error = zfs_mount_label_policy(vfsp, osname); 1582219089Spjd if (error) 1583219089Spjd goto out; 1584219089Spjd#endif 1585219089Spjd 1586218386Strasz vfsp->vfs_flag |= MNT_NFS4ACLS; 1587218386Strasz 1588185029Spjd /* 1589168404Spjd * When doing a remount, we simply refresh our temporary properties 1590168404Spjd * according to those options set in the current VFS options. 1591168404Spjd */ 1592185029Spjd if (vfsp->vfs_flag & MS_REMOUNT) { 1593185029Spjd /* refresh mount options */ 1594185029Spjd zfs_unregister_callbacks(vfsp->vfs_data); 1595185029Spjd error = zfs_register_callbacks(vfsp); 1596185029Spjd goto out; 1597185029Spjd } 1598168404Spjd 1599168510Spjd DROP_GIANT(); 1600185029Spjd error = zfs_domount(vfsp, osname); 1601168510Spjd PICKUP_GIANT(); 1602209962Smm 1603215260Smm#ifdef sun 1604209962Smm /* 1605209962Smm * Add an extra VFS_HOLD on our parent vfs so that it can't 1606209962Smm * disappear due to a forced unmount. 1607209962Smm */ 1608209962Smm if (error == 0 && ((zfsvfs_t *)vfsp->vfs_data)->z_issnap) 1609209962Smm VFS_HOLD(mvp->v_vfsp); 1610215260Smm#endif /* sun */ 1611209962Smm 1612185029Spjdout: 1613168510Spjd return (error); 1614168404Spjd} 1615168404Spjd 1616168404Spjdstatic int 1617191990Sattiliozfs_statfs(vfs_t *vfsp, struct statfs *statp) 1618169170Spjd{ 1619168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1620168404Spjd uint64_t refdbytes, availbytes, usedobjs, availobjs; 1621168404Spjd 1622168404Spjd statp->f_version = STATFS_VERSION; 1623168404Spjd 1624168404Spjd ZFS_ENTER(zfsvfs); 1625168404Spjd 1626168404Spjd dmu_objset_space(zfsvfs->z_os, 1627168404Spjd &refdbytes, &availbytes, &usedobjs, &availobjs); 1628168404Spjd 1629168404Spjd /* 1630168404Spjd * The underlying storage pool actually uses multiple block sizes. 1631168404Spjd * We report the fragsize as the smallest block size we support, 1632168404Spjd * and we report our blocksize as the filesystem's maximum blocksize. 1633168404Spjd */ 1634204101Spjd statp->f_bsize = SPA_MINBLOCKSIZE; 1635204101Spjd statp->f_iosize = zfsvfs->z_vfs->mnt_stat.f_iosize; 1636168404Spjd 1637168404Spjd /* 1638168404Spjd * The following report "total" blocks of various kinds in the 1639168404Spjd * file system, but reported in terms of f_frsize - the 1640168404Spjd * "fragment" size. 1641168404Spjd */ 1642168404Spjd 1643204101Spjd statp->f_blocks = (refdbytes + availbytes) >> SPA_MINBLOCKSHIFT; 1644168404Spjd statp->f_bfree = availbytes / statp->f_bsize; 1645168404Spjd statp->f_bavail = statp->f_bfree; /* no root reservation */ 1646168404Spjd 1647168404Spjd /* 1648168404Spjd * statvfs() should really be called statufs(), because it assumes 1649168404Spjd * static metadata. ZFS doesn't preallocate files, so the best 1650168404Spjd * we can do is report the max that could possibly fit in f_files, 1651168404Spjd * and that minus the number actually used in f_ffree. 1652168404Spjd * For f_ffree, report the smaller of the number of object available 1653168404Spjd * and the number of blocks (each object will take at least a block). 1654168404Spjd */ 1655168404Spjd statp->f_ffree = MIN(availobjs, statp->f_bfree); 1656168404Spjd statp->f_files = statp->f_ffree + usedobjs; 1657168404Spjd 1658168404Spjd /* 1659168404Spjd * We're a zfs filesystem. 1660168404Spjd */ 1661168404Spjd (void) strlcpy(statp->f_fstypename, "zfs", sizeof(statp->f_fstypename)); 1662168404Spjd 1663168404Spjd strlcpy(statp->f_mntfromname, vfsp->mnt_stat.f_mntfromname, 1664168404Spjd sizeof(statp->f_mntfromname)); 1665168404Spjd strlcpy(statp->f_mntonname, vfsp->mnt_stat.f_mntonname, 1666168404Spjd sizeof(statp->f_mntonname)); 1667168404Spjd 1668168404Spjd statp->f_namemax = ZFS_MAXNAMELEN; 1669168404Spjd 1670168404Spjd ZFS_EXIT(zfsvfs); 1671168404Spjd return (0); 1672168404Spjd} 1673168404Spjd 1674219089Spjdint 1675219089Spjdzfs_vnode_lock(vnode_t *vp, int flags) 1676219089Spjd{ 1677219089Spjd int error; 1678219089Spjd 1679219089Spjd ASSERT(vp != NULL); 1680219089Spjd 1681219089Spjd /* 1682219089Spjd * Check if the file system wasn't forcibly unmounted in the meantime. 1683219089Spjd */ 1684219089Spjd error = vn_lock(vp, flags); 1685219089Spjd if (error == 0 && (vp->v_iflag & VI_DOOMED) != 0) { 1686219089Spjd VOP_UNLOCK(vp, 0); 1687219089Spjd error = ENOENT; 1688219089Spjd } 1689219089Spjd 1690219089Spjd return (error); 1691219089Spjd} 1692219089Spjd 1693168404Spjdstatic int 1694191990Sattiliozfs_root(vfs_t *vfsp, int flags, vnode_t **vpp) 1695168404Spjd{ 1696168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1697168404Spjd znode_t *rootzp; 1698168404Spjd int error; 1699168404Spjd 1700197459Spjd ZFS_ENTER_NOERROR(zfsvfs); 1701168404Spjd 1702168404Spjd error = zfs_zget(zfsvfs, zfsvfs->z_root, &rootzp); 1703219089Spjd if (error == 0) 1704219089Spjd *vpp = ZTOV(rootzp); 1705206667Spjd 1706206667Spjd ZFS_EXIT(zfsvfs); 1707206667Spjd 1708168404Spjd if (error == 0) { 1709219089Spjd error = zfs_vnode_lock(*vpp, flags); 1710219089Spjd if (error == 0) 1711219089Spjd (*vpp)->v_vflag |= VV_ROOT; 1712168404Spjd } 1713219089Spjd if (error != 0) 1714219089Spjd *vpp = NULL; 1715168404Spjd 1716168404Spjd return (error); 1717168404Spjd} 1718168404Spjd 1719185029Spjd/* 1720185029Spjd * Teardown the zfsvfs::z_os. 1721185029Spjd * 1722185029Spjd * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock' 1723185029Spjd * and 'z_teardown_inactive_lock' held. 1724185029Spjd */ 1725185029Spjdstatic int 1726185029Spjdzfsvfs_teardown(zfsvfs_t *zfsvfs, boolean_t unmounting) 1727185029Spjd{ 1728185029Spjd znode_t *zp; 1729185029Spjd 1730185029Spjd rrw_enter(&zfsvfs->z_teardown_lock, RW_WRITER, FTAG); 1731185029Spjd 1732185029Spjd if (!unmounting) { 1733185029Spjd /* 1734185029Spjd * We purge the parent filesystem's vfsp as the parent 1735185029Spjd * filesystem and all of its snapshots have their vnode's 1736185029Spjd * v_vfsp set to the parent's filesystem's vfsp. Note, 1737185029Spjd * 'z_parent' is self referential for non-snapshots. 1738185029Spjd */ 1739185029Spjd (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); 1740197351Spjd#ifdef FREEBSD_NAMECACHE 1741197351Spjd cache_purgevfs(zfsvfs->z_parent->z_vfs); 1742197351Spjd#endif 1743185029Spjd } 1744185029Spjd 1745185029Spjd /* 1746185029Spjd * Close the zil. NB: Can't close the zil while zfs_inactive 1747185029Spjd * threads are blocked as zil_close can call zfs_inactive. 1748185029Spjd */ 1749185029Spjd if (zfsvfs->z_log) { 1750185029Spjd zil_close(zfsvfs->z_log); 1751185029Spjd zfsvfs->z_log = NULL; 1752185029Spjd } 1753185029Spjd 1754185029Spjd rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_WRITER); 1755185029Spjd 1756185029Spjd /* 1757185029Spjd * If we are not unmounting (ie: online recv) and someone already 1758185029Spjd * unmounted this file system while we were doing the switcheroo, 1759185029Spjd * or a reopen of z_os failed then just bail out now. 1760185029Spjd */ 1761185029Spjd if (!unmounting && (zfsvfs->z_unmounted || zfsvfs->z_os == NULL)) { 1762185029Spjd rw_exit(&zfsvfs->z_teardown_inactive_lock); 1763185029Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 1764185029Spjd return (EIO); 1765185029Spjd } 1766185029Spjd 1767185029Spjd /* 1768185029Spjd * At this point there are no vops active, and any new vops will 1769185029Spjd * fail with EIO since we have z_teardown_lock for writer (only 1770185029Spjd * relavent for forced unmount). 1771185029Spjd * 1772185029Spjd * Release all holds on dbufs. 1773185029Spjd */ 1774185029Spjd mutex_enter(&zfsvfs->z_znodes_lock); 1775185029Spjd for (zp = list_head(&zfsvfs->z_all_znodes); zp != NULL; 1776185029Spjd zp = list_next(&zfsvfs->z_all_znodes, zp)) 1777219089Spjd if (zp->z_sa_hdl) { 1778196297Spjd ASSERT(ZTOV(zp)->v_count >= 0); 1779185029Spjd zfs_znode_dmu_fini(zp); 1780185029Spjd } 1781185029Spjd mutex_exit(&zfsvfs->z_znodes_lock); 1782185029Spjd 1783185029Spjd /* 1784185029Spjd * If we are unmounting, set the unmounted flag and let new vops 1785185029Spjd * unblock. zfs_inactive will have the unmounted behavior, and all 1786185029Spjd * other vops will fail with EIO. 1787185029Spjd */ 1788185029Spjd if (unmounting) { 1789185029Spjd zfsvfs->z_unmounted = B_TRUE; 1790185029Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 1791185029Spjd rw_exit(&zfsvfs->z_teardown_inactive_lock); 1792197133Spjd 1793197133Spjd#ifdef __FreeBSD__ 1794197133Spjd /* 1795197133Spjd * Some znodes might not be fully reclaimed, wait for them. 1796197133Spjd */ 1797197133Spjd mutex_enter(&zfsvfs->z_znodes_lock); 1798197133Spjd while (list_head(&zfsvfs->z_all_znodes) != NULL) { 1799197133Spjd msleep(zfsvfs, &zfsvfs->z_znodes_lock, 0, 1800197133Spjd "zteardown", 0); 1801197133Spjd } 1802197133Spjd mutex_exit(&zfsvfs->z_znodes_lock); 1803197133Spjd#endif 1804185029Spjd } 1805185029Spjd 1806185029Spjd /* 1807185029Spjd * z_os will be NULL if there was an error in attempting to reopen 1808185029Spjd * zfsvfs, so just return as the properties had already been 1809185029Spjd * unregistered and cached data had been evicted before. 1810185029Spjd */ 1811185029Spjd if (zfsvfs->z_os == NULL) 1812185029Spjd return (0); 1813185029Spjd 1814185029Spjd /* 1815185029Spjd * Unregister properties. 1816185029Spjd */ 1817185029Spjd zfs_unregister_callbacks(zfsvfs); 1818185029Spjd 1819185029Spjd /* 1820185029Spjd * Evict cached data 1821185029Spjd */ 1822219089Spjd if (dmu_objset_is_dirty_anywhere(zfsvfs->z_os)) 1823219089Spjd if (!(zfsvfs->z_vfs->vfs_flag & VFS_RDONLY)) 1824219089Spjd txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0); 1825219089Spjd (void) dmu_objset_evict_dbufs(zfsvfs->z_os); 1826185029Spjd 1827185029Spjd return (0); 1828185029Spjd} 1829185029Spjd 1830168404Spjd/*ARGSUSED*/ 1831168404Spjdstatic int 1832191990Sattiliozfs_umount(vfs_t *vfsp, int fflag) 1833168404Spjd{ 1834209962Smm kthread_t *td = curthread; 1835168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1836185029Spjd objset_t *os; 1837209962Smm cred_t *cr = td->td_ucred; 1838168404Spjd int ret; 1839168404Spjd 1840185029Spjd ret = secpolicy_fs_unmount(cr, vfsp); 1841185029Spjd if (ret) { 1842212694Smm if (dsl_deleg_access((char *)refstr_value(vfsp->vfs_resource), 1843212694Smm ZFS_DELEG_PERM_MOUNT, cr)) 1844185029Spjd return (ret); 1845185029Spjd } 1846219089Spjd 1847185029Spjd /* 1848185029Spjd * We purge the parent filesystem's vfsp as the parent filesystem 1849185029Spjd * and all of its snapshots have their vnode's v_vfsp set to the 1850185029Spjd * parent's filesystem's vfsp. Note, 'z_parent' is self 1851185029Spjd * referential for non-snapshots. 1852185029Spjd */ 1853185029Spjd (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); 1854168404Spjd 1855168404Spjd /* 1856168404Spjd * Unmount any snapshots mounted under .zfs before unmounting the 1857168404Spjd * dataset itself. 1858168404Spjd */ 1859169170Spjd if (zfsvfs->z_ctldir != NULL) { 1860168404Spjd if ((ret = zfsctl_umount_snapshots(vfsp, fflag, cr)) != 0) 1861168404Spjd return (ret); 1862209962Smm ret = vflush(vfsp, 0, 0, td); 1863168404Spjd ASSERT(ret == EBUSY); 1864168404Spjd if (!(fflag & MS_FORCE)) { 1865168404Spjd if (zfsvfs->z_ctldir->v_count > 1) 1866168404Spjd return (EBUSY); 1867168404Spjd ASSERT(zfsvfs->z_ctldir->v_count == 1); 1868168404Spjd } 1869168404Spjd zfsctl_destroy(zfsvfs); 1870168404Spjd ASSERT(zfsvfs->z_ctldir == NULL); 1871168404Spjd } 1872168404Spjd 1873197459Spjd if (fflag & MS_FORCE) { 1874197459Spjd /* 1875197459Spjd * Mark file system as unmounted before calling 1876197459Spjd * vflush(FORCECLOSE). This way we ensure no future vnops 1877197459Spjd * will be called and risk operating on DOOMED vnodes. 1878197459Spjd */ 1879197459Spjd rrw_enter(&zfsvfs->z_teardown_lock, RW_WRITER, FTAG); 1880197459Spjd zfsvfs->z_unmounted = B_TRUE; 1881197459Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 1882197459Spjd } 1883197459Spjd 1884168404Spjd /* 1885168404Spjd * Flush all the files. 1886168404Spjd */ 1887209962Smm ret = vflush(vfsp, 1, (fflag & MS_FORCE) ? FORCECLOSE : 0, td); 1888168404Spjd if (ret != 0) { 1889168404Spjd if (!zfsvfs->z_issnap) { 1890168404Spjd zfsctl_create(zfsvfs); 1891168404Spjd ASSERT(zfsvfs->z_ctldir != NULL); 1892168404Spjd } 1893168404Spjd return (ret); 1894168404Spjd } 1895168404Spjd 1896185029Spjd if (!(fflag & MS_FORCE)) { 1897185029Spjd /* 1898185029Spjd * Check the number of active vnodes in the file system. 1899185029Spjd * Our count is maintained in the vfs structure, but the 1900185029Spjd * number is off by 1 to indicate a hold on the vfs 1901185029Spjd * structure itself. 1902185029Spjd * 1903185029Spjd * The '.zfs' directory maintains a reference of its 1904185029Spjd * own, and any active references underneath are 1905185029Spjd * reflected in the vnode count. 1906185029Spjd */ 1907185029Spjd if (zfsvfs->z_ctldir == NULL) { 1908185029Spjd if (vfsp->vfs_count > 1) 1909185029Spjd return (EBUSY); 1910185029Spjd } else { 1911185029Spjd if (vfsp->vfs_count > 2 || 1912185029Spjd zfsvfs->z_ctldir->v_count > 1) 1913185029Spjd return (EBUSY); 1914185029Spjd } 1915185029Spjd } else { 1916168404Spjd MNT_ILOCK(vfsp); 1917168404Spjd vfsp->mnt_kern_flag |= MNTK_UNMOUNTF; 1918168404Spjd MNT_IUNLOCK(vfsp); 1919185029Spjd } 1920168404Spjd 1921185029Spjd VERIFY(zfsvfs_teardown(zfsvfs, B_TRUE) == 0); 1922185029Spjd os = zfsvfs->z_os; 1923185029Spjd 1924185029Spjd /* 1925185029Spjd * z_os will be NULL if there was an error in 1926185029Spjd * attempting to reopen zfsvfs. 1927185029Spjd */ 1928185029Spjd if (os != NULL) { 1929168404Spjd /* 1930185029Spjd * Unset the objset user_ptr. 1931168404Spjd */ 1932219089Spjd mutex_enter(&os->os_user_ptr_lock); 1933185029Spjd dmu_objset_set_user(os, NULL); 1934219089Spjd mutex_exit(&os->os_user_ptr_lock); 1935185029Spjd 1936185029Spjd /* 1937185029Spjd * Finally release the objset 1938185029Spjd */ 1939219089Spjd dmu_objset_disown(os, zfsvfs); 1940168404Spjd } 1941168404Spjd 1942185029Spjd /* 1943185029Spjd * We can now safely destroy the '.zfs' directory node. 1944185029Spjd */ 1945185029Spjd if (zfsvfs->z_ctldir != NULL) 1946185029Spjd zfsctl_destroy(zfsvfs); 1947185029Spjd if (zfsvfs->z_issnap) { 1948185029Spjd vnode_t *svp = vfsp->mnt_vnodecovered; 1949185029Spjd 1950197515Spjd if (svp->v_count >= 2) 1951192211Skmacy VN_RELE(svp); 1952185029Spjd } 1953168404Spjd zfs_freevfs(vfsp); 1954168404Spjd 1955168404Spjd return (0); 1956168404Spjd} 1957168404Spjd 1958168404Spjdstatic int 1959168404Spjdzfs_vget(vfs_t *vfsp, ino_t ino, int flags, vnode_t **vpp) 1960168404Spjd{ 1961168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1962168404Spjd znode_t *zp; 1963168404Spjd int err; 1964168404Spjd 1965197167Spjd /* 1966215397Savg * zfs_zget() can't operate on virtual entries like .zfs/ or 1967211855Spjd * .zfs/snapshot/ directories, that's why we return EOPNOTSUPP. 1968211855Spjd * This will make NFS to switch to LOOKUP instead of using VGET. 1969197167Spjd */ 1970197167Spjd if (ino == ZFSCTL_INO_ROOT || ino == ZFSCTL_INO_SNAPDIR) 1971197167Spjd return (EOPNOTSUPP); 1972197167Spjd 1973168404Spjd ZFS_ENTER(zfsvfs); 1974168404Spjd err = zfs_zget(zfsvfs, ino, &zp); 1975168404Spjd if (err == 0 && zp->z_unlinked) { 1976168404Spjd VN_RELE(ZTOV(zp)); 1977168404Spjd err = EINVAL; 1978168404Spjd } 1979219089Spjd if (err == 0) 1980219089Spjd *vpp = ZTOV(zp); 1981206667Spjd ZFS_EXIT(zfsvfs); 1982219089Spjd if (err == 0) 1983219089Spjd err = zfs_vnode_lock(*vpp, flags); 1984168404Spjd if (err != 0) 1985168404Spjd *vpp = NULL; 1986171063Sdfr return (err); 1987168404Spjd} 1988168404Spjd 1989168404Spjdstatic int 1990196982Spjdzfs_checkexp(vfs_t *vfsp, struct sockaddr *nam, int *extflagsp, 1991196982Spjd struct ucred **credanonp, int *numsecflavors, int **secflavors) 1992196982Spjd{ 1993196982Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1994196982Spjd 1995196982Spjd /* 1996196982Spjd * If this is regular file system vfsp is the same as 1997196982Spjd * zfsvfs->z_parent->z_vfs, but if it is snapshot, 1998196982Spjd * zfsvfs->z_parent->z_vfs represents parent file system 1999196982Spjd * which we have to use here, because only this file system 2000196982Spjd * has mnt_export configured. 2001196982Spjd */ 2002196982Spjd return (vfs_stdcheckexp(zfsvfs->z_parent->z_vfs, nam, extflagsp, 2003196982Spjd credanonp, numsecflavors, secflavors)); 2004196982Spjd} 2005196982Spjd 2006197151SpjdCTASSERT(SHORT_FID_LEN <= sizeof(struct fid)); 2007197151SpjdCTASSERT(LONG_FID_LEN <= sizeof(struct fid)); 2008196982Spjd 2009196982Spjdstatic int 2010222167Srmacklemzfs_fhtovp(vfs_t *vfsp, fid_t *fidp, int flags, vnode_t **vpp) 2011168404Spjd{ 2012168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 2013168404Spjd znode_t *zp; 2014168404Spjd uint64_t object = 0; 2015168404Spjd uint64_t fid_gen = 0; 2016168404Spjd uint64_t gen_mask; 2017168404Spjd uint64_t zp_gen; 2018219089Spjd int i, err; 2019168404Spjd 2020168404Spjd *vpp = NULL; 2021168404Spjd 2022168404Spjd ZFS_ENTER(zfsvfs); 2023168404Spjd 2024196979Spjd /* 2025197177Spjd * On FreeBSD we can get snapshot's mount point or its parent file 2026197177Spjd * system mount point depending if snapshot is already mounted or not. 2027196979Spjd */ 2028197177Spjd if (zfsvfs->z_parent == zfsvfs && fidp->fid_len == LONG_FID_LEN) { 2029168404Spjd zfid_long_t *zlfid = (zfid_long_t *)fidp; 2030168404Spjd uint64_t objsetid = 0; 2031168404Spjd uint64_t setgen = 0; 2032168404Spjd 2033168404Spjd for (i = 0; i < sizeof (zlfid->zf_setid); i++) 2034168404Spjd objsetid |= ((uint64_t)zlfid->zf_setid[i]) << (8 * i); 2035168404Spjd 2036168404Spjd for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 2037168404Spjd setgen |= ((uint64_t)zlfid->zf_setgen[i]) << (8 * i); 2038168404Spjd 2039168404Spjd ZFS_EXIT(zfsvfs); 2040168404Spjd 2041168404Spjd err = zfsctl_lookup_objset(vfsp, objsetid, &zfsvfs); 2042168404Spjd if (err) 2043168404Spjd return (EINVAL); 2044168404Spjd ZFS_ENTER(zfsvfs); 2045168404Spjd } 2046168404Spjd 2047168404Spjd if (fidp->fid_len == SHORT_FID_LEN || fidp->fid_len == LONG_FID_LEN) { 2048168404Spjd zfid_short_t *zfid = (zfid_short_t *)fidp; 2049168404Spjd 2050168404Spjd for (i = 0; i < sizeof (zfid->zf_object); i++) 2051168404Spjd object |= ((uint64_t)zfid->zf_object[i]) << (8 * i); 2052168404Spjd 2053168404Spjd for (i = 0; i < sizeof (zfid->zf_gen); i++) 2054168404Spjd fid_gen |= ((uint64_t)zfid->zf_gen[i]) << (8 * i); 2055168404Spjd } else { 2056168404Spjd ZFS_EXIT(zfsvfs); 2057168404Spjd return (EINVAL); 2058168404Spjd } 2059168404Spjd 2060168404Spjd /* A zero fid_gen means we are in the .zfs control directories */ 2061168404Spjd if (fid_gen == 0 && 2062168404Spjd (object == ZFSCTL_INO_ROOT || object == ZFSCTL_INO_SNAPDIR)) { 2063168404Spjd *vpp = zfsvfs->z_ctldir; 2064168404Spjd ASSERT(*vpp != NULL); 2065168404Spjd if (object == ZFSCTL_INO_SNAPDIR) { 2066168404Spjd VERIFY(zfsctl_root_lookup(*vpp, "snapshot", vpp, NULL, 2067185029Spjd 0, NULL, NULL, NULL, NULL, NULL) == 0); 2068168404Spjd } else { 2069168404Spjd VN_HOLD(*vpp); 2070168404Spjd } 2071206667Spjd ZFS_EXIT(zfsvfs); 2072222199Srmacklem err = zfs_vnode_lock(*vpp, flags | LK_RETRY); 2073219089Spjd if (err != 0) 2074219089Spjd *vpp = NULL; 2075219089Spjd return (err); 2076168404Spjd } 2077168404Spjd 2078168404Spjd gen_mask = -1ULL >> (64 - 8 * i); 2079168404Spjd 2080168404Spjd dprintf("getting %llu [%u mask %llx]\n", object, fid_gen, gen_mask); 2081168404Spjd if (err = zfs_zget(zfsvfs, object, &zp)) { 2082168404Spjd ZFS_EXIT(zfsvfs); 2083168404Spjd return (err); 2084168404Spjd } 2085219089Spjd (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), &zp_gen, 2086219089Spjd sizeof (uint64_t)); 2087219089Spjd zp_gen = zp_gen & gen_mask; 2088168404Spjd if (zp_gen == 0) 2089168404Spjd zp_gen = 1; 2090168404Spjd if (zp->z_unlinked || zp_gen != fid_gen) { 2091168404Spjd dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen, fid_gen); 2092168404Spjd VN_RELE(ZTOV(zp)); 2093168404Spjd ZFS_EXIT(zfsvfs); 2094168404Spjd return (EINVAL); 2095168404Spjd } 2096168404Spjd 2097219089Spjd *vpp = ZTOV(zp); 2098206667Spjd ZFS_EXIT(zfsvfs); 2099222199Srmacklem err = zfs_vnode_lock(*vpp, flags | LK_RETRY); 2100219089Spjd if (err == 0) 2101219089Spjd vnode_create_vobject(*vpp, zp->z_size, curthread); 2102219089Spjd else 2103219089Spjd *vpp = NULL; 2104219089Spjd return (err); 2105168404Spjd} 2106168404Spjd 2107185029Spjd/* 2108185029Spjd * Block out VOPs and close zfsvfs_t::z_os 2109185029Spjd * 2110185029Spjd * Note, if successful, then we return with the 'z_teardown_lock' and 2111185029Spjd * 'z_teardown_inactive_lock' write held. 2112185029Spjd */ 2113185029Spjdint 2114219089Spjdzfs_suspend_fs(zfsvfs_t *zfsvfs) 2115168404Spjd{ 2116185029Spjd int error; 2117168404Spjd 2118185029Spjd if ((error = zfsvfs_teardown(zfsvfs, B_FALSE)) != 0) 2119185029Spjd return (error); 2120219089Spjd dmu_objset_disown(zfsvfs->z_os, zfsvfs); 2121168404Spjd 2122185029Spjd return (0); 2123185029Spjd} 2124168404Spjd 2125185029Spjd/* 2126185029Spjd * Reopen zfsvfs_t::z_os and release VOPs. 2127185029Spjd */ 2128185029Spjdint 2129219089Spjdzfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname) 2130185029Spjd{ 2131185029Spjd int err; 2132168404Spjd 2133185029Spjd ASSERT(RRW_WRITE_HELD(&zfsvfs->z_teardown_lock)); 2134185029Spjd ASSERT(RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock)); 2135185029Spjd 2136219089Spjd err = dmu_objset_own(osname, DMU_OST_ZFS, B_FALSE, zfsvfs, 2137219089Spjd &zfsvfs->z_os); 2138185029Spjd if (err) { 2139185029Spjd zfsvfs->z_os = NULL; 2140185029Spjd } else { 2141185029Spjd znode_t *zp; 2142219089Spjd uint64_t sa_obj = 0; 2143185029Spjd 2144219089Spjd /* 2145219089Spjd * Make sure version hasn't changed 2146219089Spjd */ 2147219089Spjd 2148219089Spjd err = zfs_get_zplprop(zfsvfs->z_os, ZFS_PROP_VERSION, 2149219089Spjd &zfsvfs->z_version); 2150219089Spjd 2151219089Spjd if (err) 2152219089Spjd goto bail; 2153219089Spjd 2154219089Spjd err = zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ, 2155219089Spjd ZFS_SA_ATTRS, 8, 1, &sa_obj); 2156219089Spjd 2157219089Spjd if (err && zfsvfs->z_version >= ZPL_VERSION_SA) 2158219089Spjd goto bail; 2159219089Spjd 2160219089Spjd if ((err = sa_setup(zfsvfs->z_os, sa_obj, 2161219089Spjd zfs_attr_table, ZPL_END, &zfsvfs->z_attr_table)) != 0) 2162219089Spjd goto bail; 2163219089Spjd 2164219089Spjd if (zfsvfs->z_version >= ZPL_VERSION_SA) 2165219089Spjd sa_register_update_callback(zfsvfs->z_os, 2166219089Spjd zfs_sa_upgrade); 2167219089Spjd 2168185029Spjd VERIFY(zfsvfs_setup(zfsvfs, B_FALSE) == 0); 2169185029Spjd 2170219089Spjd zfs_set_fuid_feature(zfsvfs); 2171219089Spjd 2172185029Spjd /* 2173185029Spjd * Attempt to re-establish all the active znodes with 2174185029Spjd * their dbufs. If a zfs_rezget() fails, then we'll let 2175185029Spjd * any potential callers discover that via ZFS_ENTER_VERIFY_VP 2176185029Spjd * when they try to use their znode. 2177185029Spjd */ 2178185029Spjd mutex_enter(&zfsvfs->z_znodes_lock); 2179185029Spjd for (zp = list_head(&zfsvfs->z_all_znodes); zp; 2180185029Spjd zp = list_next(&zfsvfs->z_all_znodes, zp)) { 2181185029Spjd (void) zfs_rezget(zp); 2182185029Spjd } 2183185029Spjd mutex_exit(&zfsvfs->z_znodes_lock); 2184168404Spjd } 2185168404Spjd 2186219089Spjdbail: 2187185029Spjd /* release the VOPs */ 2188185029Spjd rw_exit(&zfsvfs->z_teardown_inactive_lock); 2189185029Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 2190185029Spjd 2191185029Spjd if (err) { 2192185029Spjd /* 2193219089Spjd * Since we couldn't reopen zfsvfs::z_os, or 2194219089Spjd * setup the sa framework force unmount this file system. 2195185029Spjd */ 2196185029Spjd if (vn_vfswlock(zfsvfs->z_vfs->vfs_vnodecovered) == 0) 2197185029Spjd (void) dounmount(zfsvfs->z_vfs, MS_FORCE, curthread); 2198168404Spjd } 2199185029Spjd return (err); 2200168404Spjd} 2201168404Spjd 2202168404Spjdstatic void 2203168404Spjdzfs_freevfs(vfs_t *vfsp) 2204168404Spjd{ 2205168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 2206168404Spjd 2207215260Smm#ifdef sun 2208209962Smm /* 2209209962Smm * If this is a snapshot, we have an extra VFS_HOLD on our parent 2210219089Spjd * from zfs_mount(). Release it here. If we came through 2211219089Spjd * zfs_mountroot() instead, we didn't grab an extra hold, so 2212219089Spjd * skip the VFS_RELE for rootvfs. 2213209962Smm */ 2214219089Spjd if (zfsvfs->z_issnap && (vfsp != rootvfs)) 2215209962Smm VFS_RELE(zfsvfs->z_parent->z_vfs); 2216215260Smm#endif /* sun */ 2217168404Spjd 2218209962Smm zfsvfs_free(zfsvfs); 2219185029Spjd 2220168404Spjd atomic_add_32(&zfs_active_fs_count, -1); 2221168404Spjd} 2222168404Spjd 2223172135Spjd#ifdef __i386__ 2224172135Spjdstatic int desiredvnodes_backup; 2225172135Spjd#endif 2226172135Spjd 2227172135Spjdstatic void 2228172135Spjdzfs_vnodes_adjust(void) 2229172135Spjd{ 2230172135Spjd#ifdef __i386__ 2231185029Spjd int newdesiredvnodes; 2232172135Spjd 2233172135Spjd desiredvnodes_backup = desiredvnodes; 2234172135Spjd 2235172135Spjd /* 2236172135Spjd * We calculate newdesiredvnodes the same way it is done in 2237172135Spjd * vntblinit(). If it is equal to desiredvnodes, it means that 2238172135Spjd * it wasn't tuned by the administrator and we can tune it down. 2239172135Spjd */ 2240185029Spjd newdesiredvnodes = min(maxproc + cnt.v_page_count / 4, 2 * 2241185029Spjd vm_kmem_size / (5 * (sizeof(struct vm_object) + 2242185029Spjd sizeof(struct vnode)))); 2243185029Spjd if (newdesiredvnodes == desiredvnodes) 2244185029Spjd desiredvnodes = (3 * newdesiredvnodes) / 4; 2245172135Spjd#endif 2246172135Spjd} 2247172135Spjd 2248172135Spjdstatic void 2249172135Spjdzfs_vnodes_adjust_back(void) 2250172135Spjd{ 2251172135Spjd 2252172135Spjd#ifdef __i386__ 2253172135Spjd desiredvnodes = desiredvnodes_backup; 2254172135Spjd#endif 2255172135Spjd} 2256172135Spjd 2257168404Spjdvoid 2258168404Spjdzfs_init(void) 2259168404Spjd{ 2260168404Spjd 2261202129Sdelphij printf("ZFS filesystem version " ZPL_VERSION_STRING "\n"); 2262168404Spjd 2263168404Spjd /* 2264219089Spjd * Initialize .zfs directory structures 2265168404Spjd */ 2266219089Spjd zfsctl_init(); 2267168404Spjd 2268168404Spjd /* 2269219089Spjd * Initialize znode cache, vnode ops, etc... 2270168404Spjd */ 2271219089Spjd zfs_znode_init(); 2272172135Spjd 2273172135Spjd /* 2274219089Spjd * Reduce number of vnodes. Originally number of vnodes is calculated 2275172135Spjd * with UFS inode in mind. We reduce it here, because it's too big for 2276172135Spjd * ZFS/i386. 2277172135Spjd */ 2278172135Spjd zfs_vnodes_adjust(); 2279209962Smm 2280209962Smm dmu_objset_register_type(DMU_OST_ZFS, zfs_space_delta_cb); 2281168404Spjd} 2282168404Spjd 2283168404Spjdvoid 2284168404Spjdzfs_fini(void) 2285168404Spjd{ 2286168404Spjd zfsctl_fini(); 2287168404Spjd zfs_znode_fini(); 2288172135Spjd zfs_vnodes_adjust_back(); 2289168404Spjd} 2290168404Spjd 2291168404Spjdint 2292168404Spjdzfs_busy(void) 2293168404Spjd{ 2294168404Spjd return (zfs_active_fs_count != 0); 2295168404Spjd} 2296185029Spjd 2297185029Spjdint 2298209962Smmzfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers) 2299185029Spjd{ 2300185029Spjd int error; 2301209962Smm objset_t *os = zfsvfs->z_os; 2302185029Spjd dmu_tx_t *tx; 2303185029Spjd 2304185029Spjd if (newvers < ZPL_VERSION_INITIAL || newvers > ZPL_VERSION) 2305185029Spjd return (EINVAL); 2306185029Spjd 2307209962Smm if (newvers < zfsvfs->z_version) 2308209962Smm return (EINVAL); 2309185029Spjd 2310219089Spjd if (zfs_spa_version_map(newvers) > 2311219089Spjd spa_version(dmu_objset_spa(zfsvfs->z_os))) 2312219089Spjd return (ENOTSUP); 2313219089Spjd 2314185029Spjd tx = dmu_tx_create(os); 2315209962Smm dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_FALSE, ZPL_VERSION_STR); 2316219089Spjd if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) { 2317219089Spjd dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE, 2318219089Spjd ZFS_SA_ATTRS); 2319219089Spjd dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 2320219089Spjd } 2321185029Spjd error = dmu_tx_assign(tx, TXG_WAIT); 2322185029Spjd if (error) { 2323185029Spjd dmu_tx_abort(tx); 2324209962Smm return (error); 2325185029Spjd } 2326219089Spjd 2327209962Smm error = zap_update(os, MASTER_NODE_OBJ, ZPL_VERSION_STR, 2328209962Smm 8, 1, &newvers, tx); 2329185029Spjd 2330209962Smm if (error) { 2331209962Smm dmu_tx_commit(tx); 2332209962Smm return (error); 2333209962Smm } 2334209962Smm 2335219089Spjd if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) { 2336219089Spjd uint64_t sa_obj; 2337219089Spjd 2338219089Spjd ASSERT3U(spa_version(dmu_objset_spa(zfsvfs->z_os)), >=, 2339219089Spjd SPA_VERSION_SA); 2340219089Spjd sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE, 2341219089Spjd DMU_OT_NONE, 0, tx); 2342219089Spjd 2343219089Spjd error = zap_add(os, MASTER_NODE_OBJ, 2344219089Spjd ZFS_SA_ATTRS, 8, 1, &sa_obj, tx); 2345219089Spjd ASSERT3U(error, ==, 0); 2346219089Spjd 2347219089Spjd VERIFY(0 == sa_set_sa_object(os, sa_obj)); 2348219089Spjd sa_register_update_callback(os, zfs_sa_upgrade); 2349219089Spjd } 2350219089Spjd 2351219089Spjd spa_history_log_internal(LOG_DS_UPGRADE, 2352219089Spjd dmu_objset_spa(os), tx, "oldver=%llu newver=%llu dataset = %llu", 2353209962Smm zfsvfs->z_version, newvers, dmu_objset_id(os)); 2354209962Smm 2355185029Spjd dmu_tx_commit(tx); 2356185029Spjd 2357209962Smm zfsvfs->z_version = newvers; 2358209962Smm 2359219089Spjd zfs_set_fuid_feature(zfsvfs); 2360209962Smm 2361209962Smm return (0); 2362185029Spjd} 2363219089Spjd 2364185029Spjd/* 2365185029Spjd * Read a property stored within the master node. 2366185029Spjd */ 2367185029Spjdint 2368185029Spjdzfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value) 2369185029Spjd{ 2370185029Spjd const char *pname; 2371185029Spjd int error = ENOENT; 2372185029Spjd 2373185029Spjd /* 2374185029Spjd * Look up the file system's value for the property. For the 2375185029Spjd * version property, we look up a slightly different string. 2376185029Spjd */ 2377185029Spjd if (prop == ZFS_PROP_VERSION) 2378185029Spjd pname = ZPL_VERSION_STR; 2379185029Spjd else 2380185029Spjd pname = zfs_prop_to_name(prop); 2381185029Spjd 2382185029Spjd if (os != NULL) 2383185029Spjd error = zap_lookup(os, MASTER_NODE_OBJ, pname, 8, 1, value); 2384185029Spjd 2385185029Spjd if (error == ENOENT) { 2386185029Spjd /* No value set, use the default value */ 2387185029Spjd switch (prop) { 2388185029Spjd case ZFS_PROP_VERSION: 2389185029Spjd *value = ZPL_VERSION; 2390185029Spjd break; 2391185029Spjd case ZFS_PROP_NORMALIZE: 2392185029Spjd case ZFS_PROP_UTF8ONLY: 2393185029Spjd *value = 0; 2394185029Spjd break; 2395185029Spjd case ZFS_PROP_CASE: 2396185029Spjd *value = ZFS_CASE_SENSITIVE; 2397185029Spjd break; 2398185029Spjd default: 2399185029Spjd return (error); 2400185029Spjd } 2401185029Spjd error = 0; 2402185029Spjd } 2403185029Spjd return (error); 2404185029Spjd} 2405