zfs_vfsops.c revision 248653
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. 23226707Spjd * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>. 24226707Spjd * All rights reserved. 25248571Smm * Copyright (c) 2012 by Delphix. All rights reserved. 26168404Spjd */ 27168404Spjd 28219089Spjd/* Portions Copyright 2010 Robert Milkowski */ 29219089Spjd 30168404Spjd#include <sys/types.h> 31168404Spjd#include <sys/param.h> 32168404Spjd#include <sys/systm.h> 33168404Spjd#include <sys/kernel.h> 34168404Spjd#include <sys/sysmacros.h> 35168404Spjd#include <sys/kmem.h> 36168404Spjd#include <sys/acl.h> 37168404Spjd#include <sys/vnode.h> 38168404Spjd#include <sys/vfs.h> 39168404Spjd#include <sys/mntent.h> 40168404Spjd#include <sys/mount.h> 41168404Spjd#include <sys/cmn_err.h> 42168404Spjd#include <sys/zfs_znode.h> 43168404Spjd#include <sys/zfs_dir.h> 44168404Spjd#include <sys/zil.h> 45168404Spjd#include <sys/fs/zfs.h> 46168404Spjd#include <sys/dmu.h> 47168404Spjd#include <sys/dsl_prop.h> 48168404Spjd#include <sys/dsl_dataset.h> 49185029Spjd#include <sys/dsl_deleg.h> 50168404Spjd#include <sys/spa.h> 51168404Spjd#include <sys/zap.h> 52219089Spjd#include <sys/sa.h> 53240955Smm#include <sys/sa_impl.h> 54168404Spjd#include <sys/varargs.h> 55168962Spjd#include <sys/policy.h> 56168404Spjd#include <sys/atomic.h> 57168404Spjd#include <sys/zfs_ioctl.h> 58168404Spjd#include <sys/zfs_ctldir.h> 59185029Spjd#include <sys/zfs_fuid.h> 60168962Spjd#include <sys/sunddi.h> 61168404Spjd#include <sys/dnlc.h> 62185029Spjd#include <sys/dmu_objset.h> 63185029Spjd#include <sys/spa_boot.h> 64232186Smm#include <sys/jail.h> 65219089Spjd#include "zfs_comutil.h" 66168404Spjd 67168404Spjdstruct mtx zfs_debug_mtx; 68168404SpjdMTX_SYSINIT(zfs_debug_mtx, &zfs_debug_mtx, "zfs_debug", MTX_DEF); 69185029Spjd 70168404SpjdSYSCTL_NODE(_vfs, OID_AUTO, zfs, CTLFLAG_RW, 0, "ZFS file system"); 71185029Spjd 72219089Spjdint zfs_super_owner; 73185029SpjdSYSCTL_INT(_vfs_zfs, OID_AUTO, super_owner, CTLFLAG_RW, &zfs_super_owner, 0, 74185029Spjd "File system owner can perform privileged operation on his file systems"); 75185029Spjd 76219089Spjdint zfs_debug_level; 77168713SpjdTUNABLE_INT("vfs.zfs.debug", &zfs_debug_level); 78168404SpjdSYSCTL_INT(_vfs_zfs, OID_AUTO, debug, CTLFLAG_RW, &zfs_debug_level, 0, 79168404Spjd "Debug level"); 80168404Spjd 81185029SpjdSYSCTL_NODE(_vfs_zfs, OID_AUTO, version, CTLFLAG_RD, 0, "ZFS versions"); 82185029Spjdstatic int zfs_version_acl = ZFS_ACL_VERSION; 83185029SpjdSYSCTL_INT(_vfs_zfs_version, OID_AUTO, acl, CTLFLAG_RD, &zfs_version_acl, 0, 84185029Spjd "ZFS_ACL_VERSION"); 85185029Spjdstatic int zfs_version_spa = SPA_VERSION; 86185029SpjdSYSCTL_INT(_vfs_zfs_version, OID_AUTO, spa, CTLFLAG_RD, &zfs_version_spa, 0, 87185029Spjd "SPA_VERSION"); 88185029Spjdstatic int zfs_version_zpl = ZPL_VERSION; 89185029SpjdSYSCTL_INT(_vfs_zfs_version, OID_AUTO, zpl, CTLFLAG_RD, &zfs_version_zpl, 0, 90185029Spjd "ZPL_VERSION"); 91185029Spjd 92191990Sattiliostatic int zfs_mount(vfs_t *vfsp); 93191990Sattiliostatic int zfs_umount(vfs_t *vfsp, int fflag); 94191990Sattiliostatic int zfs_root(vfs_t *vfsp, int flags, vnode_t **vpp); 95191990Sattiliostatic int zfs_statfs(vfs_t *vfsp, struct statfs *statp); 96168404Spjdstatic int zfs_vget(vfs_t *vfsp, ino_t ino, int flags, vnode_t **vpp); 97191990Sattiliostatic int zfs_sync(vfs_t *vfsp, int waitfor); 98196982Spjdstatic int zfs_checkexp(vfs_t *vfsp, struct sockaddr *nam, int *extflagsp, 99196982Spjd struct ucred **credanonp, int *numsecflavors, int **secflavors); 100222167Srmacklemstatic int zfs_fhtovp(vfs_t *vfsp, fid_t *fidp, int flags, vnode_t **vpp); 101168404Spjdstatic void zfs_objset_close(zfsvfs_t *zfsvfs); 102168404Spjdstatic void zfs_freevfs(vfs_t *vfsp); 103168404Spjd 104168404Spjdstatic struct vfsops zfs_vfsops = { 105168404Spjd .vfs_mount = zfs_mount, 106168404Spjd .vfs_unmount = zfs_umount, 107168404Spjd .vfs_root = zfs_root, 108168404Spjd .vfs_statfs = zfs_statfs, 109168404Spjd .vfs_vget = zfs_vget, 110168404Spjd .vfs_sync = zfs_sync, 111196982Spjd .vfs_checkexp = zfs_checkexp, 112168404Spjd .vfs_fhtovp = zfs_fhtovp, 113168404Spjd}; 114168404Spjd 115185029SpjdVFS_SET(zfs_vfsops, zfs, VFCF_JAIL | VFCF_DELEGADMIN); 116168404Spjd 117168404Spjd/* 118168404Spjd * We need to keep a count of active fs's. 119168404Spjd * This is necessary to prevent our module 120168404Spjd * from being unloaded after a umount -f 121168404Spjd */ 122168404Spjdstatic uint32_t zfs_active_fs_count = 0; 123168404Spjd 124168404Spjd/*ARGSUSED*/ 125168404Spjdstatic int 126191990Sattiliozfs_sync(vfs_t *vfsp, int waitfor) 127168404Spjd{ 128168404Spjd 129168404Spjd /* 130168404Spjd * Data integrity is job one. We don't want a compromised kernel 131168404Spjd * writing to the storage pool, so we never sync during panic. 132168404Spjd */ 133168404Spjd if (panicstr) 134168404Spjd return (0); 135168404Spjd 136168404Spjd if (vfsp != NULL) { 137168404Spjd /* 138168404Spjd * Sync a specific filesystem. 139168404Spjd */ 140168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 141209962Smm dsl_pool_t *dp; 142168404Spjd int error; 143168404Spjd 144191990Sattilio error = vfs_stdsync(vfsp, waitfor); 145168404Spjd if (error != 0) 146168404Spjd return (error); 147168404Spjd 148168404Spjd ZFS_ENTER(zfsvfs); 149209962Smm dp = dmu_objset_pool(zfsvfs->z_os); 150209962Smm 151209962Smm /* 152209962Smm * If the system is shutting down, then skip any 153209962Smm * filesystems which may exist on a suspended pool. 154209962Smm */ 155209962Smm if (sys_shutdown && spa_suspended(dp->dp_spa)) { 156209962Smm ZFS_EXIT(zfsvfs); 157209962Smm return (0); 158209962Smm } 159209962Smm 160168404Spjd if (zfsvfs->z_log != NULL) 161219089Spjd zil_commit(zfsvfs->z_log, 0); 162219089Spjd 163168404Spjd ZFS_EXIT(zfsvfs); 164168404Spjd } else { 165168404Spjd /* 166168404Spjd * Sync all ZFS filesystems. This is what happens when you 167168404Spjd * run sync(1M). Unlike other filesystems, ZFS honors the 168168404Spjd * request by waiting for all pools to commit all dirty data. 169168404Spjd */ 170168404Spjd spa_sync_allpools(); 171168404Spjd } 172168404Spjd 173168404Spjd return (0); 174168404Spjd} 175168404Spjd 176219089Spjd#ifndef __FreeBSD__ 177219089Spjdstatic int 178219089Spjdzfs_create_unique_device(dev_t *dev) 179219089Spjd{ 180219089Spjd major_t new_major; 181219089Spjd 182219089Spjd do { 183219089Spjd ASSERT3U(zfs_minor, <=, MAXMIN32); 184219089Spjd minor_t start = zfs_minor; 185219089Spjd do { 186219089Spjd mutex_enter(&zfs_dev_mtx); 187219089Spjd if (zfs_minor >= MAXMIN32) { 188219089Spjd /* 189219089Spjd * If we're still using the real major 190219089Spjd * keep out of /dev/zfs and /dev/zvol minor 191219089Spjd * number space. If we're using a getudev()'ed 192219089Spjd * major number, we can use all of its minors. 193219089Spjd */ 194219089Spjd if (zfs_major == ddi_name_to_major(ZFS_DRIVER)) 195219089Spjd zfs_minor = ZFS_MIN_MINOR; 196219089Spjd else 197219089Spjd zfs_minor = 0; 198219089Spjd } else { 199219089Spjd zfs_minor++; 200219089Spjd } 201219089Spjd *dev = makedevice(zfs_major, zfs_minor); 202219089Spjd mutex_exit(&zfs_dev_mtx); 203219089Spjd } while (vfs_devismounted(*dev) && zfs_minor != start); 204219089Spjd if (zfs_minor == start) { 205219089Spjd /* 206219089Spjd * We are using all ~262,000 minor numbers for the 207219089Spjd * current major number. Create a new major number. 208219089Spjd */ 209219089Spjd if ((new_major = getudev()) == (major_t)-1) { 210219089Spjd cmn_err(CE_WARN, 211219089Spjd "zfs_mount: Can't get unique major " 212219089Spjd "device number."); 213219089Spjd return (-1); 214219089Spjd } 215219089Spjd mutex_enter(&zfs_dev_mtx); 216219089Spjd zfs_major = new_major; 217219089Spjd zfs_minor = 0; 218219089Spjd 219219089Spjd mutex_exit(&zfs_dev_mtx); 220219089Spjd } else { 221219089Spjd break; 222219089Spjd } 223219089Spjd /* CONSTANTCONDITION */ 224219089Spjd } while (1); 225219089Spjd 226219089Spjd return (0); 227219089Spjd} 228219089Spjd#endif /* !__FreeBSD__ */ 229219089Spjd 230168404Spjdstatic void 231168404Spjdatime_changed_cb(void *arg, uint64_t newval) 232168404Spjd{ 233168404Spjd zfsvfs_t *zfsvfs = arg; 234168404Spjd 235168404Spjd if (newval == TRUE) { 236168404Spjd zfsvfs->z_atime = TRUE; 237168404Spjd zfsvfs->z_vfs->vfs_flag &= ~MNT_NOATIME; 238168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME); 239168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_ATIME, NULL, 0); 240168404Spjd } else { 241168404Spjd zfsvfs->z_atime = FALSE; 242168404Spjd zfsvfs->z_vfs->vfs_flag |= MNT_NOATIME; 243168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_ATIME); 244168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME, NULL, 0); 245168404Spjd } 246168404Spjd} 247168404Spjd 248168404Spjdstatic void 249168404Spjdxattr_changed_cb(void *arg, uint64_t newval) 250168404Spjd{ 251168404Spjd zfsvfs_t *zfsvfs = arg; 252168404Spjd 253168404Spjd if (newval == TRUE) { 254168404Spjd /* XXX locking on vfs_flag? */ 255168404Spjd#ifdef TODO 256168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_XATTR; 257168404Spjd#endif 258168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR); 259168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_XATTR, NULL, 0); 260168404Spjd } else { 261168404Spjd /* XXX locking on vfs_flag? */ 262168404Spjd#ifdef TODO 263168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_XATTR; 264168404Spjd#endif 265168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_XATTR); 266168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR, NULL, 0); 267168404Spjd } 268168404Spjd} 269168404Spjd 270168404Spjdstatic void 271168404Spjdblksz_changed_cb(void *arg, uint64_t newval) 272168404Spjd{ 273168404Spjd zfsvfs_t *zfsvfs = arg; 274168404Spjd 275168404Spjd if (newval < SPA_MINBLOCKSIZE || 276168404Spjd newval > SPA_MAXBLOCKSIZE || !ISP2(newval)) 277168404Spjd newval = SPA_MAXBLOCKSIZE; 278168404Spjd 279168404Spjd zfsvfs->z_max_blksz = newval; 280204101Spjd zfsvfs->z_vfs->mnt_stat.f_iosize = newval; 281168404Spjd} 282168404Spjd 283168404Spjdstatic void 284168404Spjdreadonly_changed_cb(void *arg, uint64_t newval) 285168404Spjd{ 286168404Spjd zfsvfs_t *zfsvfs = arg; 287168404Spjd 288168404Spjd if (newval) { 289168404Spjd /* XXX locking on vfs_flag? */ 290168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_RDONLY; 291168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RW); 292168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RO, NULL, 0); 293168404Spjd } else { 294168404Spjd /* XXX locking on vfs_flag? */ 295168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; 296168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RO); 297168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RW, NULL, 0); 298168404Spjd } 299168404Spjd} 300168404Spjd 301168404Spjdstatic void 302168404Spjdsetuid_changed_cb(void *arg, uint64_t newval) 303168404Spjd{ 304168404Spjd zfsvfs_t *zfsvfs = arg; 305168404Spjd 306168404Spjd if (newval == FALSE) { 307168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_NOSETUID; 308168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_SETUID); 309168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID, NULL, 0); 310168404Spjd } else { 311168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_NOSETUID; 312168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID); 313168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_SETUID, NULL, 0); 314168404Spjd } 315168404Spjd} 316168404Spjd 317168404Spjdstatic void 318168404Spjdexec_changed_cb(void *arg, uint64_t newval) 319168404Spjd{ 320168404Spjd zfsvfs_t *zfsvfs = arg; 321168404Spjd 322168404Spjd if (newval == FALSE) { 323168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_NOEXEC; 324168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_EXEC); 325168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC, NULL, 0); 326168404Spjd } else { 327168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_NOEXEC; 328168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC); 329168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_EXEC, NULL, 0); 330168404Spjd } 331168404Spjd} 332168404Spjd 333185029Spjd/* 334185029Spjd * The nbmand mount option can be changed at mount time. 335185029Spjd * We can't allow it to be toggled on live file systems or incorrect 336185029Spjd * behavior may be seen from cifs clients 337185029Spjd * 338185029Spjd * This property isn't registered via dsl_prop_register(), but this callback 339185029Spjd * will be called when a file system is first mounted 340185029Spjd */ 341168404Spjdstatic void 342185029Spjdnbmand_changed_cb(void *arg, uint64_t newval) 343185029Spjd{ 344185029Spjd zfsvfs_t *zfsvfs = arg; 345185029Spjd if (newval == FALSE) { 346185029Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND); 347185029Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND, NULL, 0); 348185029Spjd } else { 349185029Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND); 350185029Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND, NULL, 0); 351185029Spjd } 352185029Spjd} 353185029Spjd 354185029Spjdstatic void 355168404Spjdsnapdir_changed_cb(void *arg, uint64_t newval) 356168404Spjd{ 357168404Spjd zfsvfs_t *zfsvfs = arg; 358168404Spjd 359168404Spjd zfsvfs->z_show_ctldir = newval; 360168404Spjd} 361168404Spjd 362168404Spjdstatic void 363185029Spjdvscan_changed_cb(void *arg, uint64_t newval) 364185029Spjd{ 365185029Spjd zfsvfs_t *zfsvfs = arg; 366185029Spjd 367185029Spjd zfsvfs->z_vscan = newval; 368185029Spjd} 369185029Spjd 370185029Spjdstatic void 371224174Smmacl_mode_changed_cb(void *arg, uint64_t newval) 372224174Smm{ 373224174Smm zfsvfs_t *zfsvfs = arg; 374224174Smm 375224174Smm zfsvfs->z_acl_mode = newval; 376224174Smm} 377224174Smm 378224174Smmstatic void 379168404Spjdacl_inherit_changed_cb(void *arg, uint64_t newval) 380168404Spjd{ 381168404Spjd zfsvfs_t *zfsvfs = arg; 382168404Spjd 383168404Spjd zfsvfs->z_acl_inherit = newval; 384168404Spjd} 385168404Spjd 386168404Spjdstatic int 387168404Spjdzfs_register_callbacks(vfs_t *vfsp) 388168404Spjd{ 389168404Spjd struct dsl_dataset *ds = NULL; 390168404Spjd objset_t *os = NULL; 391168404Spjd zfsvfs_t *zfsvfs = NULL; 392185029Spjd uint64_t nbmand; 393247187Smm boolean_t readonly = B_FALSE; 394247187Smm boolean_t do_readonly = B_FALSE; 395247187Smm boolean_t setuid = B_FALSE; 396247187Smm boolean_t do_setuid = B_FALSE; 397247187Smm boolean_t exec = B_FALSE; 398247187Smm boolean_t do_exec = B_FALSE; 399248571Smm#ifdef illumos 400247187Smm boolean_t devices = B_FALSE; 401247187Smm boolean_t do_devices = B_FALSE; 402248571Smm#endif 403247187Smm boolean_t xattr = B_FALSE; 404247187Smm boolean_t do_xattr = B_FALSE; 405247187Smm boolean_t atime = B_FALSE; 406247187Smm boolean_t do_atime = B_FALSE; 407168404Spjd int error = 0; 408168404Spjd 409168404Spjd ASSERT(vfsp); 410168404Spjd zfsvfs = vfsp->vfs_data; 411168404Spjd ASSERT(zfsvfs); 412168404Spjd os = zfsvfs->z_os; 413168404Spjd 414168404Spjd /* 415196965Spjd * This function can be called for a snapshot when we update snapshot's 416196965Spjd * mount point, which isn't really supported. 417196965Spjd */ 418196965Spjd if (dmu_objset_is_snapshot(os)) 419196965Spjd return (EOPNOTSUPP); 420196965Spjd 421196965Spjd /* 422168404Spjd * The act of registering our callbacks will destroy any mount 423168404Spjd * options we may have. In order to enable temporary overrides 424168404Spjd * of mount options, we stash away the current values and 425168404Spjd * restore them after we register the callbacks. 426168404Spjd */ 427219089Spjd if (vfs_optionisset(vfsp, MNTOPT_RO, NULL) || 428219089Spjd !spa_writeable(dmu_objset_spa(os))) { 429168404Spjd readonly = B_TRUE; 430168404Spjd do_readonly = B_TRUE; 431168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) { 432168404Spjd readonly = B_FALSE; 433168404Spjd do_readonly = B_TRUE; 434168404Spjd } 435168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) { 436168404Spjd setuid = B_FALSE; 437168404Spjd do_setuid = B_TRUE; 438168404Spjd } else { 439168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) { 440168404Spjd setuid = B_FALSE; 441168404Spjd do_setuid = B_TRUE; 442168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) { 443168404Spjd setuid = B_TRUE; 444168404Spjd do_setuid = B_TRUE; 445168404Spjd } 446168404Spjd } 447168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) { 448168404Spjd exec = B_FALSE; 449168404Spjd do_exec = B_TRUE; 450168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) { 451168404Spjd exec = B_TRUE; 452168404Spjd do_exec = B_TRUE; 453168404Spjd } 454168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL)) { 455168404Spjd xattr = B_FALSE; 456168404Spjd do_xattr = B_TRUE; 457168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL)) { 458168404Spjd xattr = B_TRUE; 459168404Spjd do_xattr = B_TRUE; 460168404Spjd } 461185029Spjd if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) { 462185029Spjd atime = B_FALSE; 463185029Spjd do_atime = B_TRUE; 464185029Spjd } else if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL)) { 465185029Spjd atime = B_TRUE; 466185029Spjd do_atime = B_TRUE; 467185029Spjd } 468168404Spjd 469168404Spjd /* 470185029Spjd * nbmand is a special property. It can only be changed at 471185029Spjd * mount time. 472185029Spjd * 473185029Spjd * This is weird, but it is documented to only be changeable 474185029Spjd * at mount time. 475185029Spjd */ 476185029Spjd if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) { 477185029Spjd nbmand = B_FALSE; 478185029Spjd } else if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) { 479185029Spjd nbmand = B_TRUE; 480185029Spjd } else { 481185029Spjd char osname[MAXNAMELEN]; 482185029Spjd 483185029Spjd dmu_objset_name(os, osname); 484185029Spjd if (error = dsl_prop_get_integer(osname, "nbmand", &nbmand, 485185029Spjd NULL)) { 486185029Spjd return (error); 487185029Spjd } 488185029Spjd } 489185029Spjd 490185029Spjd /* 491168404Spjd * Register property callbacks. 492168404Spjd * 493168404Spjd * It would probably be fine to just check for i/o error from 494168404Spjd * the first prop_register(), but I guess I like to go 495168404Spjd * overboard... 496168404Spjd */ 497168404Spjd ds = dmu_objset_ds(os); 498248571Smm dsl_pool_config_enter(dmu_objset_pool(os), FTAG); 499248571Smm error = dsl_prop_register(ds, 500248571Smm zfs_prop_to_name(ZFS_PROP_ATIME), atime_changed_cb, zfsvfs); 501168404Spjd error = error ? error : dsl_prop_register(ds, 502248571Smm zfs_prop_to_name(ZFS_PROP_XATTR), xattr_changed_cb, zfsvfs); 503168404Spjd error = error ? error : dsl_prop_register(ds, 504248571Smm zfs_prop_to_name(ZFS_PROP_RECORDSIZE), blksz_changed_cb, zfsvfs); 505168404Spjd error = error ? error : dsl_prop_register(ds, 506248571Smm zfs_prop_to_name(ZFS_PROP_READONLY), readonly_changed_cb, zfsvfs); 507248571Smm#ifdef illumos 508168404Spjd error = error ? error : dsl_prop_register(ds, 509248571Smm zfs_prop_to_name(ZFS_PROP_DEVICES), devices_changed_cb, zfsvfs); 510248571Smm#endif 511168404Spjd error = error ? error : dsl_prop_register(ds, 512248571Smm zfs_prop_to_name(ZFS_PROP_SETUID), setuid_changed_cb, zfsvfs); 513168404Spjd error = error ? error : dsl_prop_register(ds, 514248571Smm zfs_prop_to_name(ZFS_PROP_EXEC), exec_changed_cb, zfsvfs); 515168404Spjd error = error ? error : dsl_prop_register(ds, 516248571Smm zfs_prop_to_name(ZFS_PROP_SNAPDIR), snapdir_changed_cb, zfsvfs); 517224174Smm error = error ? error : dsl_prop_register(ds, 518248571Smm zfs_prop_to_name(ZFS_PROP_ACLMODE), acl_mode_changed_cb, zfsvfs); 519185029Spjd error = error ? error : dsl_prop_register(ds, 520248571Smm zfs_prop_to_name(ZFS_PROP_ACLINHERIT), acl_inherit_changed_cb, 521248571Smm zfsvfs); 522248571Smm error = error ? error : dsl_prop_register(ds, 523248571Smm zfs_prop_to_name(ZFS_PROP_VSCAN), vscan_changed_cb, zfsvfs); 524248571Smm dsl_pool_config_exit(dmu_objset_pool(os), FTAG); 525168404Spjd if (error) 526168404Spjd goto unregister; 527168404Spjd 528168404Spjd /* 529168404Spjd * Invoke our callbacks to restore temporary mount options. 530168404Spjd */ 531168404Spjd if (do_readonly) 532168404Spjd readonly_changed_cb(zfsvfs, readonly); 533168404Spjd if (do_setuid) 534168404Spjd setuid_changed_cb(zfsvfs, setuid); 535168404Spjd if (do_exec) 536168404Spjd exec_changed_cb(zfsvfs, exec); 537168404Spjd if (do_xattr) 538168404Spjd xattr_changed_cb(zfsvfs, xattr); 539185029Spjd if (do_atime) 540185029Spjd atime_changed_cb(zfsvfs, atime); 541168404Spjd 542185029Spjd nbmand_changed_cb(zfsvfs, nbmand); 543185029Spjd 544168404Spjd return (0); 545168404Spjd 546168404Spjdunregister: 547168404Spjd /* 548168404Spjd * We may attempt to unregister some callbacks that are not 549168404Spjd * registered, but this is OK; it will simply return ENOMSG, 550168404Spjd * which we will ignore. 551168404Spjd */ 552248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ATIME), 553248571Smm atime_changed_cb, zfsvfs); 554248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_XATTR), 555248571Smm xattr_changed_cb, zfsvfs); 556248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_RECORDSIZE), 557248571Smm blksz_changed_cb, zfsvfs); 558248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_READONLY), 559248571Smm readonly_changed_cb, zfsvfs); 560248571Smm#ifdef illumos 561248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_DEVICES), 562248571Smm devices_changed_cb, zfsvfs); 563248571Smm#endif 564248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_SETUID), 565248571Smm setuid_changed_cb, zfsvfs); 566248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_EXEC), 567248571Smm exec_changed_cb, zfsvfs); 568248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_SNAPDIR), 569248571Smm snapdir_changed_cb, zfsvfs); 570248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ACLMODE), 571248571Smm acl_mode_changed_cb, zfsvfs); 572248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_ACLINHERIT), 573248571Smm acl_inherit_changed_cb, zfsvfs); 574248571Smm (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_VSCAN), 575248571Smm vscan_changed_cb, zfsvfs); 576168404Spjd return (error); 577168404Spjd} 578168404Spjd 579219089Spjdstatic int 580219089Spjdzfs_space_delta_cb(dmu_object_type_t bonustype, void *data, 581219089Spjd uint64_t *userp, uint64_t *groupp) 582209962Smm{ 583219089Spjd /* 584219089Spjd * Is it a valid type of object to track? 585219089Spjd */ 586219089Spjd if (bonustype != DMU_OT_ZNODE && bonustype != DMU_OT_SA) 587219089Spjd return (ENOENT); 588209962Smm 589219089Spjd /* 590219089Spjd * If we have a NULL data pointer 591219089Spjd * then assume the id's aren't changing and 592219089Spjd * return EEXIST to the dmu to let it know to 593219089Spjd * use the same ids 594219089Spjd */ 595219089Spjd if (data == NULL) 596219089Spjd return (EEXIST); 597209962Smm 598219089Spjd if (bonustype == DMU_OT_ZNODE) { 599240955Smm znode_phys_t *znp = data; 600219089Spjd *userp = znp->zp_uid; 601219089Spjd *groupp = znp->zp_gid; 602219089Spjd } else { 603219089Spjd int hdrsize; 604240955Smm sa_hdr_phys_t *sap = data; 605240955Smm sa_hdr_phys_t sa = *sap; 606240955Smm boolean_t swap = B_FALSE; 607209962Smm 608219089Spjd ASSERT(bonustype == DMU_OT_SA); 609209962Smm 610240955Smm if (sa.sa_magic == 0) { 611219089Spjd /* 612219089Spjd * This should only happen for newly created 613219089Spjd * files that haven't had the znode data filled 614219089Spjd * in yet. 615219089Spjd */ 616219089Spjd *userp = 0; 617219089Spjd *groupp = 0; 618240955Smm return (0); 619219089Spjd } 620240955Smm if (sa.sa_magic == BSWAP_32(SA_MAGIC)) { 621240955Smm sa.sa_magic = SA_MAGIC; 622240955Smm sa.sa_layout_info = BSWAP_16(sa.sa_layout_info); 623240955Smm swap = B_TRUE; 624240955Smm } else { 625240955Smm VERIFY3U(sa.sa_magic, ==, SA_MAGIC); 626240955Smm } 627240955Smm 628240955Smm hdrsize = sa_hdrsize(&sa); 629240955Smm VERIFY3U(hdrsize, >=, sizeof (sa_hdr_phys_t)); 630240955Smm *userp = *((uint64_t *)((uintptr_t)data + hdrsize + 631240955Smm SA_UID_OFFSET)); 632240955Smm *groupp = *((uint64_t *)((uintptr_t)data + hdrsize + 633240955Smm SA_GID_OFFSET)); 634240955Smm if (swap) { 635240955Smm *userp = BSWAP_64(*userp); 636240955Smm *groupp = BSWAP_64(*groupp); 637240955Smm } 638209962Smm } 639248571Smm return (0); 640209962Smm} 641209962Smm 642209962Smmstatic void 643209962Smmfuidstr_to_sid(zfsvfs_t *zfsvfs, const char *fuidstr, 644209962Smm char *domainbuf, int buflen, uid_t *ridp) 645209962Smm{ 646209962Smm uint64_t fuid; 647209962Smm const char *domain; 648209962Smm 649209962Smm fuid = strtonum(fuidstr, NULL); 650209962Smm 651209962Smm domain = zfs_fuid_find_by_idx(zfsvfs, FUID_INDEX(fuid)); 652209962Smm if (domain) 653209962Smm (void) strlcpy(domainbuf, domain, buflen); 654209962Smm else 655209962Smm domainbuf[0] = '\0'; 656209962Smm *ridp = FUID_RID(fuid); 657209962Smm} 658209962Smm 659209962Smmstatic uint64_t 660209962Smmzfs_userquota_prop_to_obj(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type) 661209962Smm{ 662209962Smm switch (type) { 663209962Smm case ZFS_PROP_USERUSED: 664209962Smm return (DMU_USERUSED_OBJECT); 665209962Smm case ZFS_PROP_GROUPUSED: 666209962Smm return (DMU_GROUPUSED_OBJECT); 667209962Smm case ZFS_PROP_USERQUOTA: 668209962Smm return (zfsvfs->z_userquota_obj); 669209962Smm case ZFS_PROP_GROUPQUOTA: 670209962Smm return (zfsvfs->z_groupquota_obj); 671209962Smm } 672209962Smm return (0); 673209962Smm} 674209962Smm 675209962Smmint 676209962Smmzfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 677209962Smm uint64_t *cookiep, void *vbuf, uint64_t *bufsizep) 678209962Smm{ 679209962Smm int error; 680209962Smm zap_cursor_t zc; 681209962Smm zap_attribute_t za; 682209962Smm zfs_useracct_t *buf = vbuf; 683209962Smm uint64_t obj; 684209962Smm 685209962Smm if (!dmu_objset_userspace_present(zfsvfs->z_os)) 686209962Smm return (ENOTSUP); 687209962Smm 688209962Smm obj = zfs_userquota_prop_to_obj(zfsvfs, type); 689209962Smm if (obj == 0) { 690209962Smm *bufsizep = 0; 691209962Smm return (0); 692209962Smm } 693209962Smm 694209962Smm for (zap_cursor_init_serialized(&zc, zfsvfs->z_os, obj, *cookiep); 695209962Smm (error = zap_cursor_retrieve(&zc, &za)) == 0; 696209962Smm zap_cursor_advance(&zc)) { 697209962Smm if ((uintptr_t)buf - (uintptr_t)vbuf + sizeof (zfs_useracct_t) > 698209962Smm *bufsizep) 699209962Smm break; 700209962Smm 701209962Smm fuidstr_to_sid(zfsvfs, za.za_name, 702209962Smm buf->zu_domain, sizeof (buf->zu_domain), &buf->zu_rid); 703209962Smm 704209962Smm buf->zu_space = za.za_first_integer; 705209962Smm buf++; 706209962Smm } 707209962Smm if (error == ENOENT) 708209962Smm error = 0; 709209962Smm 710209962Smm ASSERT3U((uintptr_t)buf - (uintptr_t)vbuf, <=, *bufsizep); 711209962Smm *bufsizep = (uintptr_t)buf - (uintptr_t)vbuf; 712209962Smm *cookiep = zap_cursor_serialize(&zc); 713209962Smm zap_cursor_fini(&zc); 714209962Smm return (error); 715209962Smm} 716209962Smm 717209962Smm/* 718209962Smm * buf must be big enough (eg, 32 bytes) 719209962Smm */ 720168404Spjdstatic int 721209962Smmid_to_fuidstr(zfsvfs_t *zfsvfs, const char *domain, uid_t rid, 722209962Smm char *buf, boolean_t addok) 723209962Smm{ 724209962Smm uint64_t fuid; 725209962Smm int domainid = 0; 726209962Smm 727209962Smm if (domain && domain[0]) { 728209962Smm domainid = zfs_fuid_find_by_domain(zfsvfs, domain, NULL, addok); 729209962Smm if (domainid == -1) 730209962Smm return (ENOENT); 731209962Smm } 732209962Smm fuid = FUID_ENCODE(domainid, rid); 733209962Smm (void) sprintf(buf, "%llx", (longlong_t)fuid); 734209962Smm return (0); 735209962Smm} 736209962Smm 737209962Smmint 738209962Smmzfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 739209962Smm const char *domain, uint64_t rid, uint64_t *valp) 740209962Smm{ 741209962Smm char buf[32]; 742209962Smm int err; 743209962Smm uint64_t obj; 744209962Smm 745209962Smm *valp = 0; 746209962Smm 747209962Smm if (!dmu_objset_userspace_present(zfsvfs->z_os)) 748209962Smm return (ENOTSUP); 749209962Smm 750209962Smm obj = zfs_userquota_prop_to_obj(zfsvfs, type); 751209962Smm if (obj == 0) 752209962Smm return (0); 753209962Smm 754209962Smm err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_FALSE); 755209962Smm if (err) 756209962Smm return (err); 757209962Smm 758209962Smm err = zap_lookup(zfsvfs->z_os, obj, buf, 8, 1, valp); 759209962Smm if (err == ENOENT) 760209962Smm err = 0; 761209962Smm return (err); 762209962Smm} 763209962Smm 764209962Smmint 765209962Smmzfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 766209962Smm const char *domain, uint64_t rid, uint64_t quota) 767209962Smm{ 768209962Smm char buf[32]; 769209962Smm int err; 770209962Smm dmu_tx_t *tx; 771209962Smm uint64_t *objp; 772209962Smm boolean_t fuid_dirtied; 773209962Smm 774209962Smm if (type != ZFS_PROP_USERQUOTA && type != ZFS_PROP_GROUPQUOTA) 775209962Smm return (EINVAL); 776209962Smm 777209962Smm if (zfsvfs->z_version < ZPL_VERSION_USERSPACE) 778209962Smm return (ENOTSUP); 779209962Smm 780209962Smm objp = (type == ZFS_PROP_USERQUOTA) ? &zfsvfs->z_userquota_obj : 781209962Smm &zfsvfs->z_groupquota_obj; 782209962Smm 783209962Smm err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_TRUE); 784209962Smm if (err) 785209962Smm return (err); 786209962Smm fuid_dirtied = zfsvfs->z_fuid_dirty; 787209962Smm 788209962Smm tx = dmu_tx_create(zfsvfs->z_os); 789209962Smm dmu_tx_hold_zap(tx, *objp ? *objp : DMU_NEW_OBJECT, B_TRUE, NULL); 790209962Smm if (*objp == 0) { 791209962Smm dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE, 792209962Smm zfs_userquota_prop_prefixes[type]); 793209962Smm } 794209962Smm if (fuid_dirtied) 795209962Smm zfs_fuid_txhold(zfsvfs, tx); 796209962Smm err = dmu_tx_assign(tx, TXG_WAIT); 797209962Smm if (err) { 798209962Smm dmu_tx_abort(tx); 799209962Smm return (err); 800209962Smm } 801209962Smm 802209962Smm mutex_enter(&zfsvfs->z_lock); 803209962Smm if (*objp == 0) { 804209962Smm *objp = zap_create(zfsvfs->z_os, DMU_OT_USERGROUP_QUOTA, 805209962Smm DMU_OT_NONE, 0, tx); 806209962Smm VERIFY(0 == zap_add(zfsvfs->z_os, MASTER_NODE_OBJ, 807209962Smm zfs_userquota_prop_prefixes[type], 8, 1, objp, tx)); 808209962Smm } 809209962Smm mutex_exit(&zfsvfs->z_lock); 810209962Smm 811209962Smm if (quota == 0) { 812209962Smm err = zap_remove(zfsvfs->z_os, *objp, buf, tx); 813209962Smm if (err == ENOENT) 814209962Smm err = 0; 815209962Smm } else { 816209962Smm err = zap_update(zfsvfs->z_os, *objp, buf, 8, 1, "a, tx); 817209962Smm } 818209962Smm ASSERT(err == 0); 819209962Smm if (fuid_dirtied) 820209962Smm zfs_fuid_sync(zfsvfs, tx); 821209962Smm dmu_tx_commit(tx); 822209962Smm return (err); 823209962Smm} 824209962Smm 825209962Smmboolean_t 826219089Spjdzfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup, uint64_t fuid) 827209962Smm{ 828209962Smm char buf[32]; 829209962Smm uint64_t used, quota, usedobj, quotaobj; 830209962Smm int err; 831209962Smm 832209962Smm usedobj = isgroup ? DMU_GROUPUSED_OBJECT : DMU_USERUSED_OBJECT; 833209962Smm quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj; 834209962Smm 835209962Smm if (quotaobj == 0 || zfsvfs->z_replay) 836209962Smm return (B_FALSE); 837209962Smm 838209962Smm (void) sprintf(buf, "%llx", (longlong_t)fuid); 839209962Smm err = zap_lookup(zfsvfs->z_os, quotaobj, buf, 8, 1, "a); 840209962Smm if (err != 0) 841209962Smm return (B_FALSE); 842209962Smm 843209962Smm err = zap_lookup(zfsvfs->z_os, usedobj, buf, 8, 1, &used); 844209962Smm if (err != 0) 845209962Smm return (B_FALSE); 846209962Smm return (used >= quota); 847209962Smm} 848209962Smm 849219089Spjdboolean_t 850219089Spjdzfs_owner_overquota(zfsvfs_t *zfsvfs, znode_t *zp, boolean_t isgroup) 851219089Spjd{ 852219089Spjd uint64_t fuid; 853219089Spjd uint64_t quotaobj; 854219089Spjd 855219089Spjd quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj; 856219089Spjd 857219089Spjd fuid = isgroup ? zp->z_gid : zp->z_uid; 858219089Spjd 859219089Spjd if (quotaobj == 0 || zfsvfs->z_replay) 860219089Spjd return (B_FALSE); 861219089Spjd 862219089Spjd return (zfs_fuid_overquota(zfsvfs, isgroup, fuid)); 863219089Spjd} 864219089Spjd 865209962Smmint 866219089Spjdzfsvfs_create(const char *osname, zfsvfs_t **zfvp) 867209962Smm{ 868209962Smm objset_t *os; 869209962Smm zfsvfs_t *zfsvfs; 870209962Smm uint64_t zval; 871209962Smm int i, error; 872219089Spjd uint64_t sa_obj; 873209962Smm 874219089Spjd zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); 875219089Spjd 876219089Spjd /* 877219089Spjd * We claim to always be readonly so we can open snapshots; 878219089Spjd * other ZPL code will prevent us from writing to snapshots. 879219089Spjd */ 880219089Spjd error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zfsvfs, &os); 881219089Spjd if (error) { 882219089Spjd kmem_free(zfsvfs, sizeof (zfsvfs_t)); 883209962Smm return (error); 884209962Smm } 885209962Smm 886209962Smm /* 887209962Smm * Initialize the zfs-specific filesystem structure. 888209962Smm * Should probably make this a kmem cache, shuffle fields, 889209962Smm * and just bzero up to z_hold_mtx[]. 890209962Smm */ 891209962Smm zfsvfs->z_vfs = NULL; 892209962Smm zfsvfs->z_parent = zfsvfs; 893209962Smm zfsvfs->z_max_blksz = SPA_MAXBLOCKSIZE; 894209962Smm zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE; 895209962Smm zfsvfs->z_os = os; 896209962Smm 897209962Smm error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version); 898209962Smm if (error) { 899209962Smm goto out; 900219089Spjd } else if (zfsvfs->z_version > 901219089Spjd zfs_zpl_version_map(spa_version(dmu_objset_spa(os)))) { 902219089Spjd (void) printf("Can't mount a version %lld file system " 903219089Spjd "on a version %lld pool\n. Pool must be upgraded to mount " 904219089Spjd "this file system.", (u_longlong_t)zfsvfs->z_version, 905219089Spjd (u_longlong_t)spa_version(dmu_objset_spa(os))); 906209962Smm error = ENOTSUP; 907209962Smm goto out; 908209962Smm } 909209962Smm if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0) 910209962Smm goto out; 911209962Smm zfsvfs->z_norm = (int)zval; 912209962Smm 913209962Smm if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0) 914209962Smm goto out; 915209962Smm zfsvfs->z_utf8 = (zval != 0); 916209962Smm 917209962Smm if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0) 918209962Smm goto out; 919209962Smm zfsvfs->z_case = (uint_t)zval; 920209962Smm 921209962Smm /* 922209962Smm * Fold case on file systems that are always or sometimes case 923209962Smm * insensitive. 924209962Smm */ 925209962Smm if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE || 926209962Smm zfsvfs->z_case == ZFS_CASE_MIXED) 927209962Smm zfsvfs->z_norm |= U8_TEXTPREP_TOUPPER; 928209962Smm 929209962Smm zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); 930219089Spjd zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); 931209962Smm 932219089Spjd if (zfsvfs->z_use_sa) { 933219089Spjd /* should either have both of these objects or none */ 934219089Spjd error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, 935219089Spjd &sa_obj); 936219089Spjd if (error) 937219089Spjd return (error); 938219089Spjd } else { 939219089Spjd /* 940219089Spjd * Pre SA versions file systems should never touch 941219089Spjd * either the attribute registration or layout objects. 942219089Spjd */ 943219089Spjd sa_obj = 0; 944219089Spjd } 945219089Spjd 946219089Spjd error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END, 947219089Spjd &zfsvfs->z_attr_table); 948219089Spjd if (error) 949219089Spjd goto out; 950219089Spjd 951219089Spjd if (zfsvfs->z_version >= ZPL_VERSION_SA) 952219089Spjd sa_register_update_callback(os, zfs_sa_upgrade); 953219089Spjd 954209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, 955209962Smm &zfsvfs->z_root); 956209962Smm if (error) 957209962Smm goto out; 958209962Smm ASSERT(zfsvfs->z_root != 0); 959209962Smm 960209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1, 961209962Smm &zfsvfs->z_unlinkedobj); 962209962Smm if (error) 963209962Smm goto out; 964209962Smm 965209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, 966209962Smm zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA], 967209962Smm 8, 1, &zfsvfs->z_userquota_obj); 968209962Smm if (error && error != ENOENT) 969209962Smm goto out; 970209962Smm 971209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, 972209962Smm zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA], 973209962Smm 8, 1, &zfsvfs->z_groupquota_obj); 974209962Smm if (error && error != ENOENT) 975209962Smm goto out; 976209962Smm 977209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1, 978209962Smm &zfsvfs->z_fuid_obj); 979209962Smm if (error && error != ENOENT) 980209962Smm goto out; 981209962Smm 982209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1, 983209962Smm &zfsvfs->z_shares_dir); 984209962Smm if (error && error != ENOENT) 985209962Smm goto out; 986209962Smm 987209962Smm mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); 988209962Smm mutex_init(&zfsvfs->z_lock, NULL, MUTEX_DEFAULT, NULL); 989209962Smm list_create(&zfsvfs->z_all_znodes, sizeof (znode_t), 990209962Smm offsetof(znode_t, z_link_node)); 991248571Smm rrw_init(&zfsvfs->z_teardown_lock, B_FALSE); 992209962Smm rw_init(&zfsvfs->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL); 993209962Smm rw_init(&zfsvfs->z_fuid_lock, NULL, RW_DEFAULT, NULL); 994209962Smm for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 995209962Smm mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); 996209962Smm 997219089Spjd *zfvp = zfsvfs; 998209962Smm return (0); 999209962Smm 1000209962Smmout: 1001219089Spjd dmu_objset_disown(os, zfsvfs); 1002219089Spjd *zfvp = NULL; 1003209962Smm kmem_free(zfsvfs, sizeof (zfsvfs_t)); 1004209962Smm return (error); 1005209962Smm} 1006209962Smm 1007209962Smmstatic int 1008185029Spjdzfsvfs_setup(zfsvfs_t *zfsvfs, boolean_t mounting) 1009168404Spjd{ 1010185029Spjd int error; 1011185029Spjd 1012185029Spjd error = zfs_register_callbacks(zfsvfs->z_vfs); 1013185029Spjd if (error) 1014185029Spjd return (error); 1015185029Spjd 1016185029Spjd /* 1017185029Spjd * Set the objset user_ptr to track its zfsvfs. 1018185029Spjd */ 1019219089Spjd mutex_enter(&zfsvfs->z_os->os_user_ptr_lock); 1020185029Spjd dmu_objset_set_user(zfsvfs->z_os, zfsvfs); 1021219089Spjd mutex_exit(&zfsvfs->z_os->os_user_ptr_lock); 1022185029Spjd 1023208689Smm zfsvfs->z_log = zil_open(zfsvfs->z_os, zfs_get_data); 1024208689Smm 1025185029Spjd /* 1026185029Spjd * If we are not mounting (ie: online recv), then we don't 1027185029Spjd * have to worry about replaying the log as we blocked all 1028185029Spjd * operations out since we closed the ZIL. 1029185029Spjd */ 1030185029Spjd if (mounting) { 1031185029Spjd boolean_t readonly; 1032185029Spjd 1033185029Spjd /* 1034185029Spjd * During replay we remove the read only flag to 1035185029Spjd * allow replays to succeed. 1036185029Spjd */ 1037185029Spjd readonly = zfsvfs->z_vfs->vfs_flag & VFS_RDONLY; 1038208689Smm if (readonly != 0) 1039208689Smm zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; 1040208689Smm else 1041208689Smm zfs_unlinked_drain(zfsvfs); 1042185029Spjd 1043219089Spjd /* 1044219089Spjd * Parse and replay the intent log. 1045219089Spjd * 1046219089Spjd * Because of ziltest, this must be done after 1047219089Spjd * zfs_unlinked_drain(). (Further note: ziltest 1048219089Spjd * doesn't use readonly mounts, where 1049219089Spjd * zfs_unlinked_drain() isn't called.) This is because 1050219089Spjd * ziltest causes spa_sync() to think it's committed, 1051219089Spjd * but actually it is not, so the intent log contains 1052219089Spjd * many txg's worth of changes. 1053219089Spjd * 1054219089Spjd * In particular, if object N is in the unlinked set in 1055219089Spjd * the last txg to actually sync, then it could be 1056219089Spjd * actually freed in a later txg and then reallocated 1057219089Spjd * in a yet later txg. This would write a "create 1058219089Spjd * object N" record to the intent log. Normally, this 1059219089Spjd * would be fine because the spa_sync() would have 1060219089Spjd * written out the fact that object N is free, before 1061219089Spjd * we could write the "create object N" intent log 1062219089Spjd * record. 1063219089Spjd * 1064219089Spjd * But when we are in ziltest mode, we advance the "open 1065219089Spjd * txg" without actually spa_sync()-ing the changes to 1066219089Spjd * disk. So we would see that object N is still 1067219089Spjd * allocated and in the unlinked set, and there is an 1068219089Spjd * intent log record saying to allocate it. 1069219089Spjd */ 1070219089Spjd if (spa_writeable(dmu_objset_spa(zfsvfs->z_os))) { 1071219089Spjd if (zil_replay_disable) { 1072219089Spjd zil_destroy(zfsvfs->z_log, B_FALSE); 1073219089Spjd } else { 1074219089Spjd zfsvfs->z_replay = B_TRUE; 1075219089Spjd zil_replay(zfsvfs->z_os, zfsvfs, 1076219089Spjd zfs_replay_vector); 1077219089Spjd zfsvfs->z_replay = B_FALSE; 1078219089Spjd } 1079208689Smm } 1080185029Spjd zfsvfs->z_vfs->vfs_flag |= readonly; /* restore readonly bit */ 1081185029Spjd } 1082185029Spjd 1083185029Spjd return (0); 1084185029Spjd} 1085185029Spjd 1086210470Smmextern krwlock_t zfsvfs_lock; /* in zfs_znode.c */ 1087210470Smm 1088209962Smmvoid 1089209962Smmzfsvfs_free(zfsvfs_t *zfsvfs) 1090185029Spjd{ 1091209962Smm int i; 1092209962Smm 1093210470Smm /* 1094210470Smm * This is a barrier to prevent the filesystem from going away in 1095210470Smm * zfs_znode_move() until we can safely ensure that the filesystem is 1096210470Smm * not unmounted. We consider the filesystem valid before the barrier 1097210470Smm * and invalid after the barrier. 1098210470Smm */ 1099210470Smm rw_enter(&zfsvfs_lock, RW_READER); 1100210470Smm rw_exit(&zfsvfs_lock); 1101210470Smm 1102209962Smm zfs_fuid_destroy(zfsvfs); 1103209962Smm 1104185029Spjd mutex_destroy(&zfsvfs->z_znodes_lock); 1105209962Smm mutex_destroy(&zfsvfs->z_lock); 1106185029Spjd list_destroy(&zfsvfs->z_all_znodes); 1107185029Spjd rrw_destroy(&zfsvfs->z_teardown_lock); 1108185029Spjd rw_destroy(&zfsvfs->z_teardown_inactive_lock); 1109185029Spjd rw_destroy(&zfsvfs->z_fuid_lock); 1110209962Smm for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 1111209962Smm mutex_destroy(&zfsvfs->z_hold_mtx[i]); 1112185029Spjd kmem_free(zfsvfs, sizeof (zfsvfs_t)); 1113185029Spjd} 1114185029Spjd 1115209962Smmstatic void 1116209962Smmzfs_set_fuid_feature(zfsvfs_t *zfsvfs) 1117209962Smm{ 1118209962Smm zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); 1119219089Spjd if (zfsvfs->z_vfs) { 1120219089Spjd if (zfsvfs->z_use_fuids) { 1121219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_XVATTR); 1122219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_SYSATTR_VIEWS); 1123219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACEMASKONACCESS); 1124219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACLONCREATE); 1125219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACCESS_FILTER); 1126219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_REPARSE); 1127219089Spjd } else { 1128219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_XVATTR); 1129219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_SYSATTR_VIEWS); 1130219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACEMASKONACCESS); 1131219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACLONCREATE); 1132219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACCESS_FILTER); 1133219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_REPARSE); 1134219089Spjd } 1135209962Smm } 1136219089Spjd zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); 1137209962Smm} 1138209962Smm 1139185029Spjdstatic int 1140185029Spjdzfs_domount(vfs_t *vfsp, char *osname) 1141185029Spjd{ 1142209962Smm uint64_t recordsize, fsid_guid; 1143168404Spjd int error = 0; 1144168404Spjd zfsvfs_t *zfsvfs; 1145209962Smm vnode_t *vp; 1146168404Spjd 1147168404Spjd ASSERT(vfsp); 1148168404Spjd ASSERT(osname); 1149168404Spjd 1150219089Spjd error = zfsvfs_create(osname, &zfsvfs); 1151209962Smm if (error) 1152209962Smm return (error); 1153168404Spjd zfsvfs->z_vfs = vfsp; 1154168404Spjd 1155168404Spjd if (error = dsl_prop_get_integer(osname, "recordsize", &recordsize, 1156168404Spjd NULL)) 1157168404Spjd goto out; 1158204101Spjd zfsvfs->z_vfs->vfs_bsize = SPA_MINBLOCKSIZE; 1159204101Spjd zfsvfs->z_vfs->mnt_stat.f_iosize = recordsize; 1160168404Spjd 1161168404Spjd vfsp->vfs_data = zfsvfs; 1162218386Strasz vfsp->mnt_flag |= MNT_LOCAL; 1163168404Spjd vfsp->mnt_kern_flag |= MNTK_LOOKUP_SHARED; 1164193440Sps vfsp->mnt_kern_flag |= MNTK_SHARED_WRITES; 1165242573Savg vfsp->mnt_kern_flag |= MNTK_EXTENDED_SHARED; 1166168404Spjd 1167209962Smm /* 1168209962Smm * The fsid is 64 bits, composed of an 8-bit fs type, which 1169209962Smm * separates our fsid from any other filesystem types, and a 1170209962Smm * 56-bit objset unique ID. The objset unique ID is unique to 1171209962Smm * all objsets open on this system, provided by unique_create(). 1172209962Smm * The 8-bit fs type must be put in the low bits of fsid[1] 1173209962Smm * because that's where other Solaris filesystems put it. 1174209962Smm */ 1175209962Smm fsid_guid = dmu_objset_fsid_guid(zfsvfs->z_os); 1176209962Smm ASSERT((fsid_guid & ~((1ULL<<56)-1)) == 0); 1177209962Smm vfsp->vfs_fsid.val[0] = fsid_guid; 1178209962Smm vfsp->vfs_fsid.val[1] = ((fsid_guid>>32) << 8) | 1179209962Smm vfsp->mnt_vfc->vfc_typenum & 0xFF; 1180168404Spjd 1181185029Spjd /* 1182185029Spjd * Set features for file system. 1183185029Spjd */ 1184209962Smm zfs_set_fuid_feature(zfsvfs); 1185185029Spjd if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE) { 1186185029Spjd vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); 1187185029Spjd vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); 1188185029Spjd vfs_set_feature(vfsp, VFSFT_NOCASESENSITIVE); 1189185029Spjd } else if (zfsvfs->z_case == ZFS_CASE_MIXED) { 1190185029Spjd vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); 1191185029Spjd vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); 1192185029Spjd } 1193219089Spjd vfs_set_feature(vfsp, VFSFT_ZEROCOPY_SUPPORTED); 1194185029Spjd 1195168404Spjd if (dmu_objset_is_snapshot(zfsvfs->z_os)) { 1196185029Spjd uint64_t pval; 1197168404Spjd 1198168404Spjd atime_changed_cb(zfsvfs, B_FALSE); 1199168404Spjd readonly_changed_cb(zfsvfs, B_TRUE); 1200185029Spjd if (error = dsl_prop_get_integer(osname, "xattr", &pval, NULL)) 1201168404Spjd goto out; 1202185029Spjd xattr_changed_cb(zfsvfs, pval); 1203168404Spjd zfsvfs->z_issnap = B_TRUE; 1204219089Spjd zfsvfs->z_os->os_sync = ZFS_SYNC_DISABLED; 1205209962Smm 1206219089Spjd mutex_enter(&zfsvfs->z_os->os_user_ptr_lock); 1207209962Smm dmu_objset_set_user(zfsvfs->z_os, zfsvfs); 1208219089Spjd mutex_exit(&zfsvfs->z_os->os_user_ptr_lock); 1209168404Spjd } else { 1210185029Spjd error = zfsvfs_setup(zfsvfs, B_TRUE); 1211168404Spjd } 1212168404Spjd 1213168404Spjd vfs_mountedfrom(vfsp, osname); 1214209962Smm /* Grab extra reference. */ 1215209962Smm VERIFY(VFS_ROOT(vfsp, LK_EXCLUSIVE, &vp) == 0); 1216209962Smm VOP_UNLOCK(vp, 0); 1217168404Spjd 1218168404Spjd if (!zfsvfs->z_issnap) 1219168404Spjd zfsctl_create(zfsvfs); 1220168404Spjdout: 1221168404Spjd if (error) { 1222219089Spjd dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1223209962Smm zfsvfs_free(zfsvfs); 1224168404Spjd } else { 1225168404Spjd atomic_add_32(&zfs_active_fs_count, 1); 1226168404Spjd } 1227168404Spjd 1228168404Spjd return (error); 1229168404Spjd} 1230168404Spjd 1231168404Spjdvoid 1232168404Spjdzfs_unregister_callbacks(zfsvfs_t *zfsvfs) 1233168404Spjd{ 1234168404Spjd objset_t *os = zfsvfs->z_os; 1235168404Spjd struct dsl_dataset *ds; 1236168404Spjd 1237168404Spjd /* 1238168404Spjd * Unregister properties. 1239168404Spjd */ 1240168404Spjd if (!dmu_objset_is_snapshot(os)) { 1241168404Spjd ds = dmu_objset_ds(os); 1242168404Spjd VERIFY(dsl_prop_unregister(ds, "atime", atime_changed_cb, 1243168404Spjd zfsvfs) == 0); 1244168404Spjd 1245168404Spjd VERIFY(dsl_prop_unregister(ds, "xattr", xattr_changed_cb, 1246168404Spjd zfsvfs) == 0); 1247168404Spjd 1248168404Spjd VERIFY(dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, 1249168404Spjd zfsvfs) == 0); 1250168404Spjd 1251168404Spjd VERIFY(dsl_prop_unregister(ds, "readonly", readonly_changed_cb, 1252168404Spjd zfsvfs) == 0); 1253168404Spjd 1254168404Spjd VERIFY(dsl_prop_unregister(ds, "setuid", setuid_changed_cb, 1255168404Spjd zfsvfs) == 0); 1256168404Spjd 1257168404Spjd VERIFY(dsl_prop_unregister(ds, "exec", exec_changed_cb, 1258168404Spjd zfsvfs) == 0); 1259168404Spjd 1260168404Spjd VERIFY(dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, 1261168404Spjd zfsvfs) == 0); 1262168404Spjd 1263224174Smm VERIFY(dsl_prop_unregister(ds, "aclmode", acl_mode_changed_cb, 1264224174Smm zfsvfs) == 0); 1265224174Smm 1266168404Spjd VERIFY(dsl_prop_unregister(ds, "aclinherit", 1267168404Spjd acl_inherit_changed_cb, zfsvfs) == 0); 1268185029Spjd 1269185029Spjd VERIFY(dsl_prop_unregister(ds, "vscan", 1270185029Spjd vscan_changed_cb, zfsvfs) == 0); 1271168404Spjd } 1272168404Spjd} 1273168404Spjd 1274219089Spjd#ifdef SECLABEL 1275219089Spjd/* 1276219089Spjd * Convert a decimal digit string to a uint64_t integer. 1277219089Spjd */ 1278219089Spjdstatic int 1279219089Spjdstr_to_uint64(char *str, uint64_t *objnum) 1280219089Spjd{ 1281219089Spjd uint64_t num = 0; 1282219089Spjd 1283219089Spjd while (*str) { 1284219089Spjd if (*str < '0' || *str > '9') 1285219089Spjd return (EINVAL); 1286219089Spjd 1287219089Spjd num = num*10 + *str++ - '0'; 1288219089Spjd } 1289219089Spjd 1290219089Spjd *objnum = num; 1291219089Spjd return (0); 1292219089Spjd} 1293219089Spjd 1294219089Spjd/* 1295219089Spjd * The boot path passed from the boot loader is in the form of 1296219089Spjd * "rootpool-name/root-filesystem-object-number'. Convert this 1297219089Spjd * string to a dataset name: "rootpool-name/root-filesystem-name". 1298219089Spjd */ 1299219089Spjdstatic int 1300219089Spjdzfs_parse_bootfs(char *bpath, char *outpath) 1301219089Spjd{ 1302219089Spjd char *slashp; 1303219089Spjd uint64_t objnum; 1304219089Spjd int error; 1305219089Spjd 1306219089Spjd if (*bpath == 0 || *bpath == '/') 1307219089Spjd return (EINVAL); 1308219089Spjd 1309219089Spjd (void) strcpy(outpath, bpath); 1310219089Spjd 1311219089Spjd slashp = strchr(bpath, '/'); 1312219089Spjd 1313219089Spjd /* if no '/', just return the pool name */ 1314219089Spjd if (slashp == NULL) { 1315219089Spjd return (0); 1316219089Spjd } 1317219089Spjd 1318219089Spjd /* if not a number, just return the root dataset name */ 1319219089Spjd if (str_to_uint64(slashp+1, &objnum)) { 1320219089Spjd return (0); 1321219089Spjd } 1322219089Spjd 1323219089Spjd *slashp = '\0'; 1324219089Spjd error = dsl_dsobj_to_dsname(bpath, objnum, outpath); 1325219089Spjd *slashp = '/'; 1326219089Spjd 1327219089Spjd return (error); 1328219089Spjd} 1329219089Spjd 1330219089Spjd/* 1331219089Spjd * zfs_check_global_label: 1332219089Spjd * Check that the hex label string is appropriate for the dataset 1333219089Spjd * being mounted into the global_zone proper. 1334219089Spjd * 1335219089Spjd * Return an error if the hex label string is not default or 1336219089Spjd * admin_low/admin_high. For admin_low labels, the corresponding 1337219089Spjd * dataset must be readonly. 1338219089Spjd */ 1339219089Spjdint 1340219089Spjdzfs_check_global_label(const char *dsname, const char *hexsl) 1341219089Spjd{ 1342219089Spjd if (strcasecmp(hexsl, ZFS_MLSLABEL_DEFAULT) == 0) 1343219089Spjd return (0); 1344219089Spjd if (strcasecmp(hexsl, ADMIN_HIGH) == 0) 1345219089Spjd return (0); 1346219089Spjd if (strcasecmp(hexsl, ADMIN_LOW) == 0) { 1347219089Spjd /* must be readonly */ 1348219089Spjd uint64_t rdonly; 1349219089Spjd 1350219089Spjd if (dsl_prop_get_integer(dsname, 1351219089Spjd zfs_prop_to_name(ZFS_PROP_READONLY), &rdonly, NULL)) 1352219089Spjd return (EACCES); 1353219089Spjd return (rdonly ? 0 : EACCES); 1354219089Spjd } 1355219089Spjd return (EACCES); 1356219089Spjd} 1357219089Spjd 1358219089Spjd/* 1359219089Spjd * zfs_mount_label_policy: 1360219089Spjd * Determine whether the mount is allowed according to MAC check. 1361219089Spjd * by comparing (where appropriate) label of the dataset against 1362219089Spjd * the label of the zone being mounted into. If the dataset has 1363219089Spjd * no label, create one. 1364219089Spjd * 1365219089Spjd * Returns: 1366219089Spjd * 0 : access allowed 1367219089Spjd * >0 : error code, such as EACCES 1368219089Spjd */ 1369219089Spjdstatic int 1370219089Spjdzfs_mount_label_policy(vfs_t *vfsp, char *osname) 1371219089Spjd{ 1372219089Spjd int error, retv; 1373219089Spjd zone_t *mntzone = NULL; 1374219089Spjd ts_label_t *mnt_tsl; 1375219089Spjd bslabel_t *mnt_sl; 1376219089Spjd bslabel_t ds_sl; 1377219089Spjd char ds_hexsl[MAXNAMELEN]; 1378219089Spjd 1379219089Spjd retv = EACCES; /* assume the worst */ 1380219089Spjd 1381219089Spjd /* 1382219089Spjd * Start by getting the dataset label if it exists. 1383219089Spjd */ 1384219089Spjd error = dsl_prop_get(osname, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 1385219089Spjd 1, sizeof (ds_hexsl), &ds_hexsl, NULL); 1386219089Spjd if (error) 1387219089Spjd return (EACCES); 1388219089Spjd 1389219089Spjd /* 1390219089Spjd * If labeling is NOT enabled, then disallow the mount of datasets 1391219089Spjd * which have a non-default label already. No other label checks 1392219089Spjd * are needed. 1393219089Spjd */ 1394219089Spjd if (!is_system_labeled()) { 1395219089Spjd if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0) 1396219089Spjd return (0); 1397219089Spjd return (EACCES); 1398219089Spjd } 1399219089Spjd 1400219089Spjd /* 1401219089Spjd * Get the label of the mountpoint. If mounting into the global 1402219089Spjd * zone (i.e. mountpoint is not within an active zone and the 1403219089Spjd * zoned property is off), the label must be default or 1404219089Spjd * admin_low/admin_high only; no other checks are needed. 1405219089Spjd */ 1406219089Spjd mntzone = zone_find_by_any_path(refstr_value(vfsp->vfs_mntpt), B_FALSE); 1407219089Spjd if (mntzone->zone_id == GLOBAL_ZONEID) { 1408219089Spjd uint64_t zoned; 1409219089Spjd 1410219089Spjd zone_rele(mntzone); 1411219089Spjd 1412219089Spjd if (dsl_prop_get_integer(osname, 1413219089Spjd zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) 1414219089Spjd return (EACCES); 1415219089Spjd if (!zoned) 1416219089Spjd return (zfs_check_global_label(osname, ds_hexsl)); 1417219089Spjd else 1418219089Spjd /* 1419219089Spjd * This is the case of a zone dataset being mounted 1420219089Spjd * initially, before the zone has been fully created; 1421219089Spjd * allow this mount into global zone. 1422219089Spjd */ 1423219089Spjd return (0); 1424219089Spjd } 1425219089Spjd 1426219089Spjd mnt_tsl = mntzone->zone_slabel; 1427219089Spjd ASSERT(mnt_tsl != NULL); 1428219089Spjd label_hold(mnt_tsl); 1429219089Spjd mnt_sl = label2bslabel(mnt_tsl); 1430219089Spjd 1431219089Spjd if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0) { 1432219089Spjd /* 1433219089Spjd * The dataset doesn't have a real label, so fabricate one. 1434219089Spjd */ 1435219089Spjd char *str = NULL; 1436219089Spjd 1437219089Spjd if (l_to_str_internal(mnt_sl, &str) == 0 && 1438248571Smm dsl_prop_set_string(osname, 1439248571Smm zfs_prop_to_name(ZFS_PROP_MLSLABEL), 1440248571Smm ZPROP_SRC_LOCAL, str) == 0) 1441219089Spjd retv = 0; 1442219089Spjd if (str != NULL) 1443219089Spjd kmem_free(str, strlen(str) + 1); 1444219089Spjd } else if (hexstr_to_label(ds_hexsl, &ds_sl) == 0) { 1445219089Spjd /* 1446219089Spjd * Now compare labels to complete the MAC check. If the 1447219089Spjd * labels are equal then allow access. If the mountpoint 1448219089Spjd * label dominates the dataset label, allow readonly access. 1449219089Spjd * Otherwise, access is denied. 1450219089Spjd */ 1451219089Spjd if (blequal(mnt_sl, &ds_sl)) 1452219089Spjd retv = 0; 1453219089Spjd else if (bldominates(mnt_sl, &ds_sl)) { 1454219089Spjd vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0); 1455219089Spjd retv = 0; 1456219089Spjd } 1457219089Spjd } 1458219089Spjd 1459219089Spjd label_rele(mnt_tsl); 1460219089Spjd zone_rele(mntzone); 1461219089Spjd return (retv); 1462219089Spjd} 1463219089Spjd#endif /* SECLABEL */ 1464219089Spjd 1465219089Spjd#ifdef OPENSOLARIS_MOUNTROOT 1466219089Spjdstatic int 1467219089Spjdzfs_mountroot(vfs_t *vfsp, enum whymountroot why) 1468219089Spjd{ 1469219089Spjd int error = 0; 1470219089Spjd static int zfsrootdone = 0; 1471219089Spjd zfsvfs_t *zfsvfs = NULL; 1472219089Spjd znode_t *zp = NULL; 1473219089Spjd vnode_t *vp = NULL; 1474219089Spjd char *zfs_bootfs; 1475219089Spjd char *zfs_devid; 1476219089Spjd 1477219089Spjd ASSERT(vfsp); 1478219089Spjd 1479219089Spjd /* 1480219089Spjd * The filesystem that we mount as root is defined in the 1481219089Spjd * boot property "zfs-bootfs" with a format of 1482219089Spjd * "poolname/root-dataset-objnum". 1483219089Spjd */ 1484219089Spjd if (why == ROOT_INIT) { 1485219089Spjd if (zfsrootdone++) 1486219089Spjd return (EBUSY); 1487219089Spjd /* 1488219089Spjd * the process of doing a spa_load will require the 1489219089Spjd * clock to be set before we could (for example) do 1490219089Spjd * something better by looking at the timestamp on 1491219089Spjd * an uberblock, so just set it to -1. 1492219089Spjd */ 1493219089Spjd clkset(-1); 1494219089Spjd 1495219089Spjd if ((zfs_bootfs = spa_get_bootprop("zfs-bootfs")) == NULL) { 1496219089Spjd cmn_err(CE_NOTE, "spa_get_bootfs: can not get " 1497219089Spjd "bootfs name"); 1498219089Spjd return (EINVAL); 1499219089Spjd } 1500219089Spjd zfs_devid = spa_get_bootprop("diskdevid"); 1501219089Spjd error = spa_import_rootpool(rootfs.bo_name, zfs_devid); 1502219089Spjd if (zfs_devid) 1503219089Spjd spa_free_bootprop(zfs_devid); 1504219089Spjd if (error) { 1505219089Spjd spa_free_bootprop(zfs_bootfs); 1506219089Spjd cmn_err(CE_NOTE, "spa_import_rootpool: error %d", 1507219089Spjd error); 1508219089Spjd return (error); 1509219089Spjd } 1510219089Spjd if (error = zfs_parse_bootfs(zfs_bootfs, rootfs.bo_name)) { 1511219089Spjd spa_free_bootprop(zfs_bootfs); 1512219089Spjd cmn_err(CE_NOTE, "zfs_parse_bootfs: error %d", 1513219089Spjd error); 1514219089Spjd return (error); 1515219089Spjd } 1516219089Spjd 1517219089Spjd spa_free_bootprop(zfs_bootfs); 1518219089Spjd 1519219089Spjd if (error = vfs_lock(vfsp)) 1520219089Spjd return (error); 1521219089Spjd 1522219089Spjd if (error = zfs_domount(vfsp, rootfs.bo_name)) { 1523219089Spjd cmn_err(CE_NOTE, "zfs_domount: error %d", error); 1524219089Spjd goto out; 1525219089Spjd } 1526219089Spjd 1527219089Spjd zfsvfs = (zfsvfs_t *)vfsp->vfs_data; 1528219089Spjd ASSERT(zfsvfs); 1529219089Spjd if (error = zfs_zget(zfsvfs, zfsvfs->z_root, &zp)) { 1530219089Spjd cmn_err(CE_NOTE, "zfs_zget: error %d", error); 1531219089Spjd goto out; 1532219089Spjd } 1533219089Spjd 1534219089Spjd vp = ZTOV(zp); 1535219089Spjd mutex_enter(&vp->v_lock); 1536219089Spjd vp->v_flag |= VROOT; 1537219089Spjd mutex_exit(&vp->v_lock); 1538219089Spjd rootvp = vp; 1539219089Spjd 1540219089Spjd /* 1541219089Spjd * Leave rootvp held. The root file system is never unmounted. 1542219089Spjd */ 1543219089Spjd 1544219089Spjd vfs_add((struct vnode *)0, vfsp, 1545219089Spjd (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); 1546219089Spjdout: 1547219089Spjd vfs_unlock(vfsp); 1548219089Spjd return (error); 1549219089Spjd } else if (why == ROOT_REMOUNT) { 1550219089Spjd readonly_changed_cb(vfsp->vfs_data, B_FALSE); 1551219089Spjd vfsp->vfs_flag |= VFS_REMOUNT; 1552219089Spjd 1553219089Spjd /* refresh mount options */ 1554219089Spjd zfs_unregister_callbacks(vfsp->vfs_data); 1555219089Spjd return (zfs_register_callbacks(vfsp)); 1556219089Spjd 1557219089Spjd } else if (why == ROOT_UNMOUNT) { 1558219089Spjd zfs_unregister_callbacks((zfsvfs_t *)vfsp->vfs_data); 1559219089Spjd (void) zfs_sync(vfsp, 0, 0); 1560219089Spjd return (0); 1561219089Spjd } 1562219089Spjd 1563219089Spjd /* 1564219089Spjd * if "why" is equal to anything else other than ROOT_INIT, 1565219089Spjd * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it. 1566219089Spjd */ 1567219089Spjd return (ENOTSUP); 1568219089Spjd} 1569219089Spjd#endif /* OPENSOLARIS_MOUNTROOT */ 1570219089Spjd 1571241286Savgstatic int 1572241286Savggetpoolname(const char *osname, char *poolname) 1573241286Savg{ 1574241286Savg char *p; 1575241286Savg 1576241286Savg p = strchr(osname, '/'); 1577241286Savg if (p == NULL) { 1578241286Savg if (strlen(osname) >= MAXNAMELEN) 1579241286Savg return (ENAMETOOLONG); 1580241286Savg (void) strcpy(poolname, osname); 1581241286Savg } else { 1582241286Savg if (p - osname >= MAXNAMELEN) 1583241286Savg return (ENAMETOOLONG); 1584241286Savg (void) strncpy(poolname, osname, p - osname); 1585241286Savg poolname[p - osname] = '\0'; 1586241286Savg } 1587241286Savg return (0); 1588241286Savg} 1589241286Savg 1590168404Spjd/*ARGSUSED*/ 1591168404Spjdstatic int 1592191990Sattiliozfs_mount(vfs_t *vfsp) 1593168404Spjd{ 1594191990Sattilio kthread_t *td = curthread; 1595185029Spjd vnode_t *mvp = vfsp->mnt_vnodecovered; 1596185029Spjd cred_t *cr = td->td_ucred; 1597185029Spjd char *osname; 1598185029Spjd int error = 0; 1599185029Spjd int canwrite; 1600168404Spjd 1601232186Smm if (!prison_allow(td->td_ucred, PR_ALLOW_MOUNT_ZFS)) 1602232186Smm return (EPERM); 1603232186Smm 1604185029Spjd if (vfs_getopt(vfsp->mnt_optnew, "from", (void **)&osname, NULL)) 1605185029Spjd return (EINVAL); 1606185029Spjd 1607168404Spjd /* 1608185029Spjd * If full-owner-access is enabled and delegated administration is 1609185029Spjd * turned on, we must set nosuid. 1610185029Spjd */ 1611185029Spjd if (zfs_super_owner && 1612185029Spjd dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr) != ECANCELED) { 1613185029Spjd secpolicy_fs_mount_clearopts(cr, vfsp); 1614185029Spjd } 1615185029Spjd 1616185029Spjd /* 1617185029Spjd * Check for mount privilege? 1618185029Spjd * 1619185029Spjd * If we don't have privilege then see if 1620185029Spjd * we have local permission to allow it 1621185029Spjd */ 1622185029Spjd error = secpolicy_fs_mount(cr, mvp, vfsp); 1623185029Spjd if (error) { 1624212694Smm if (dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr) != 0) 1625196944Spjd goto out; 1626196944Spjd 1627196944Spjd if (!(vfsp->vfs_flag & MS_REMOUNT)) { 1628185029Spjd vattr_t vattr; 1629185029Spjd 1630185029Spjd /* 1631185029Spjd * Make sure user is the owner of the mount point 1632185029Spjd * or has sufficient privileges. 1633185029Spjd */ 1634185029Spjd 1635185029Spjd vattr.va_mask = AT_UID; 1636185029Spjd 1637196662Spjd vn_lock(mvp, LK_SHARED | LK_RETRY); 1638212694Smm if (VOP_GETATTR(mvp, &vattr, cr)) { 1639196662Spjd VOP_UNLOCK(mvp, 0); 1640185029Spjd goto out; 1641185029Spjd } 1642185029Spjd 1643185029Spjd if (secpolicy_vnode_owner(mvp, cr, vattr.va_uid) != 0 && 1644185029Spjd VOP_ACCESS(mvp, VWRITE, cr, td) != 0) { 1645196662Spjd VOP_UNLOCK(mvp, 0); 1646185029Spjd goto out; 1647185029Spjd } 1648196662Spjd VOP_UNLOCK(mvp, 0); 1649196944Spjd } 1650185029Spjd 1651196944Spjd secpolicy_fs_mount_clearopts(cr, vfsp); 1652185029Spjd } 1653185029Spjd 1654185029Spjd /* 1655185029Spjd * Refuse to mount a filesystem if we are in a local zone and the 1656185029Spjd * dataset is not visible. 1657185029Spjd */ 1658185029Spjd if (!INGLOBALZONE(curthread) && 1659185029Spjd (!zone_dataset_visible(osname, &canwrite) || !canwrite)) { 1660185029Spjd error = EPERM; 1661185029Spjd goto out; 1662185029Spjd } 1663185029Spjd 1664219089Spjd#ifdef SECLABEL 1665219089Spjd error = zfs_mount_label_policy(vfsp, osname); 1666219089Spjd if (error) 1667219089Spjd goto out; 1668219089Spjd#endif 1669219089Spjd 1670218386Strasz vfsp->vfs_flag |= MNT_NFS4ACLS; 1671218386Strasz 1672185029Spjd /* 1673168404Spjd * When doing a remount, we simply refresh our temporary properties 1674168404Spjd * according to those options set in the current VFS options. 1675168404Spjd */ 1676185029Spjd if (vfsp->vfs_flag & MS_REMOUNT) { 1677185029Spjd /* refresh mount options */ 1678185029Spjd zfs_unregister_callbacks(vfsp->vfs_data); 1679185029Spjd error = zfs_register_callbacks(vfsp); 1680185029Spjd goto out; 1681185029Spjd } 1682168404Spjd 1683241286Savg /* Initial root mount: try hard to import the requested root pool. */ 1684241286Savg if ((vfsp->vfs_flag & MNT_ROOTFS) != 0 && 1685241286Savg (vfsp->vfs_flag & MNT_UPDATE) == 0) { 1686241286Savg char pname[MAXNAMELEN]; 1687241286Savg 1688241286Savg error = getpoolname(osname, pname); 1689242567Savg if (error == 0) 1690242567Savg error = spa_import_rootpool(pname); 1691241286Savg if (error) 1692241286Savg goto out; 1693241286Savg } 1694168510Spjd DROP_GIANT(); 1695185029Spjd error = zfs_domount(vfsp, osname); 1696168510Spjd PICKUP_GIANT(); 1697209962Smm 1698215260Smm#ifdef sun 1699209962Smm /* 1700209962Smm * Add an extra VFS_HOLD on our parent vfs so that it can't 1701209962Smm * disappear due to a forced unmount. 1702209962Smm */ 1703209962Smm if (error == 0 && ((zfsvfs_t *)vfsp->vfs_data)->z_issnap) 1704209962Smm VFS_HOLD(mvp->v_vfsp); 1705215260Smm#endif /* sun */ 1706209962Smm 1707185029Spjdout: 1708168510Spjd return (error); 1709168404Spjd} 1710168404Spjd 1711168404Spjdstatic int 1712191990Sattiliozfs_statfs(vfs_t *vfsp, struct statfs *statp) 1713169170Spjd{ 1714168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1715168404Spjd uint64_t refdbytes, availbytes, usedobjs, availobjs; 1716168404Spjd 1717168404Spjd statp->f_version = STATFS_VERSION; 1718168404Spjd 1719168404Spjd ZFS_ENTER(zfsvfs); 1720168404Spjd 1721168404Spjd dmu_objset_space(zfsvfs->z_os, 1722168404Spjd &refdbytes, &availbytes, &usedobjs, &availobjs); 1723168404Spjd 1724168404Spjd /* 1725168404Spjd * The underlying storage pool actually uses multiple block sizes. 1726168404Spjd * We report the fragsize as the smallest block size we support, 1727168404Spjd * and we report our blocksize as the filesystem's maximum blocksize. 1728168404Spjd */ 1729204101Spjd statp->f_bsize = SPA_MINBLOCKSIZE; 1730204101Spjd statp->f_iosize = zfsvfs->z_vfs->mnt_stat.f_iosize; 1731168404Spjd 1732168404Spjd /* 1733168404Spjd * The following report "total" blocks of various kinds in the 1734168404Spjd * file system, but reported in terms of f_frsize - the 1735168404Spjd * "fragment" size. 1736168404Spjd */ 1737168404Spjd 1738204101Spjd statp->f_blocks = (refdbytes + availbytes) >> SPA_MINBLOCKSHIFT; 1739168404Spjd statp->f_bfree = availbytes / statp->f_bsize; 1740168404Spjd statp->f_bavail = statp->f_bfree; /* no root reservation */ 1741168404Spjd 1742168404Spjd /* 1743168404Spjd * statvfs() should really be called statufs(), because it assumes 1744168404Spjd * static metadata. ZFS doesn't preallocate files, so the best 1745168404Spjd * we can do is report the max that could possibly fit in f_files, 1746168404Spjd * and that minus the number actually used in f_ffree. 1747168404Spjd * For f_ffree, report the smaller of the number of object available 1748168404Spjd * and the number of blocks (each object will take at least a block). 1749168404Spjd */ 1750168404Spjd statp->f_ffree = MIN(availobjs, statp->f_bfree); 1751168404Spjd statp->f_files = statp->f_ffree + usedobjs; 1752168404Spjd 1753168404Spjd /* 1754168404Spjd * We're a zfs filesystem. 1755168404Spjd */ 1756168404Spjd (void) strlcpy(statp->f_fstypename, "zfs", sizeof(statp->f_fstypename)); 1757168404Spjd 1758168404Spjd strlcpy(statp->f_mntfromname, vfsp->mnt_stat.f_mntfromname, 1759168404Spjd sizeof(statp->f_mntfromname)); 1760168404Spjd strlcpy(statp->f_mntonname, vfsp->mnt_stat.f_mntonname, 1761168404Spjd sizeof(statp->f_mntonname)); 1762168404Spjd 1763168404Spjd statp->f_namemax = ZFS_MAXNAMELEN; 1764168404Spjd 1765168404Spjd ZFS_EXIT(zfsvfs); 1766168404Spjd return (0); 1767168404Spjd} 1768168404Spjd 1769219089Spjdint 1770219089Spjdzfs_vnode_lock(vnode_t *vp, int flags) 1771219089Spjd{ 1772219089Spjd int error; 1773219089Spjd 1774219089Spjd ASSERT(vp != NULL); 1775219089Spjd 1776219089Spjd error = vn_lock(vp, flags); 1777219089Spjd return (error); 1778219089Spjd} 1779219089Spjd 1780168404Spjdstatic int 1781191990Sattiliozfs_root(vfs_t *vfsp, int flags, vnode_t **vpp) 1782168404Spjd{ 1783168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1784168404Spjd znode_t *rootzp; 1785168404Spjd int error; 1786168404Spjd 1787197459Spjd ZFS_ENTER_NOERROR(zfsvfs); 1788168404Spjd 1789168404Spjd error = zfs_zget(zfsvfs, zfsvfs->z_root, &rootzp); 1790219089Spjd if (error == 0) 1791219089Spjd *vpp = ZTOV(rootzp); 1792206667Spjd 1793206667Spjd ZFS_EXIT(zfsvfs); 1794206667Spjd 1795168404Spjd if (error == 0) { 1796219089Spjd error = zfs_vnode_lock(*vpp, flags); 1797219089Spjd if (error == 0) 1798219089Spjd (*vpp)->v_vflag |= VV_ROOT; 1799168404Spjd } 1800219089Spjd if (error != 0) 1801219089Spjd *vpp = NULL; 1802168404Spjd 1803168404Spjd return (error); 1804168404Spjd} 1805168404Spjd 1806185029Spjd/* 1807185029Spjd * Teardown the zfsvfs::z_os. 1808185029Spjd * 1809185029Spjd * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock' 1810185029Spjd * and 'z_teardown_inactive_lock' held. 1811185029Spjd */ 1812185029Spjdstatic int 1813185029Spjdzfsvfs_teardown(zfsvfs_t *zfsvfs, boolean_t unmounting) 1814185029Spjd{ 1815185029Spjd znode_t *zp; 1816185029Spjd 1817185029Spjd rrw_enter(&zfsvfs->z_teardown_lock, RW_WRITER, FTAG); 1818185029Spjd 1819185029Spjd if (!unmounting) { 1820185029Spjd /* 1821185029Spjd * We purge the parent filesystem's vfsp as the parent 1822185029Spjd * filesystem and all of its snapshots have their vnode's 1823185029Spjd * v_vfsp set to the parent's filesystem's vfsp. Note, 1824185029Spjd * 'z_parent' is self referential for non-snapshots. 1825185029Spjd */ 1826185029Spjd (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); 1827197351Spjd#ifdef FREEBSD_NAMECACHE 1828197351Spjd cache_purgevfs(zfsvfs->z_parent->z_vfs); 1829197351Spjd#endif 1830185029Spjd } 1831185029Spjd 1832185029Spjd /* 1833185029Spjd * Close the zil. NB: Can't close the zil while zfs_inactive 1834185029Spjd * threads are blocked as zil_close can call zfs_inactive. 1835185029Spjd */ 1836185029Spjd if (zfsvfs->z_log) { 1837185029Spjd zil_close(zfsvfs->z_log); 1838185029Spjd zfsvfs->z_log = NULL; 1839185029Spjd } 1840185029Spjd 1841185029Spjd rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_WRITER); 1842185029Spjd 1843185029Spjd /* 1844185029Spjd * If we are not unmounting (ie: online recv) and someone already 1845185029Spjd * unmounted this file system while we were doing the switcheroo, 1846185029Spjd * or a reopen of z_os failed then just bail out now. 1847185029Spjd */ 1848185029Spjd if (!unmounting && (zfsvfs->z_unmounted || zfsvfs->z_os == NULL)) { 1849185029Spjd rw_exit(&zfsvfs->z_teardown_inactive_lock); 1850185029Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 1851185029Spjd return (EIO); 1852185029Spjd } 1853185029Spjd 1854185029Spjd /* 1855185029Spjd * At this point there are no vops active, and any new vops will 1856185029Spjd * fail with EIO since we have z_teardown_lock for writer (only 1857185029Spjd * relavent for forced unmount). 1858185029Spjd * 1859185029Spjd * Release all holds on dbufs. 1860185029Spjd */ 1861185029Spjd mutex_enter(&zfsvfs->z_znodes_lock); 1862185029Spjd for (zp = list_head(&zfsvfs->z_all_znodes); zp != NULL; 1863185029Spjd zp = list_next(&zfsvfs->z_all_znodes, zp)) 1864219089Spjd if (zp->z_sa_hdl) { 1865196297Spjd ASSERT(ZTOV(zp)->v_count >= 0); 1866185029Spjd zfs_znode_dmu_fini(zp); 1867185029Spjd } 1868185029Spjd mutex_exit(&zfsvfs->z_znodes_lock); 1869185029Spjd 1870185029Spjd /* 1871185029Spjd * If we are unmounting, set the unmounted flag and let new vops 1872185029Spjd * unblock. zfs_inactive will have the unmounted behavior, and all 1873185029Spjd * other vops will fail with EIO. 1874185029Spjd */ 1875185029Spjd if (unmounting) { 1876185029Spjd zfsvfs->z_unmounted = B_TRUE; 1877185029Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 1878185029Spjd rw_exit(&zfsvfs->z_teardown_inactive_lock); 1879185029Spjd } 1880185029Spjd 1881185029Spjd /* 1882185029Spjd * z_os will be NULL if there was an error in attempting to reopen 1883185029Spjd * zfsvfs, so just return as the properties had already been 1884185029Spjd * unregistered and cached data had been evicted before. 1885185029Spjd */ 1886185029Spjd if (zfsvfs->z_os == NULL) 1887185029Spjd return (0); 1888185029Spjd 1889185029Spjd /* 1890185029Spjd * Unregister properties. 1891185029Spjd */ 1892185029Spjd zfs_unregister_callbacks(zfsvfs); 1893185029Spjd 1894185029Spjd /* 1895185029Spjd * Evict cached data 1896185029Spjd */ 1897239774Smm if (dsl_dataset_is_dirty(dmu_objset_ds(zfsvfs->z_os)) && 1898239774Smm !(zfsvfs->z_vfs->vfs_flag & VFS_RDONLY)) 1899239774Smm txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0); 1900248571Smm dmu_objset_evict_dbufs(zfsvfs->z_os); 1901185029Spjd 1902185029Spjd return (0); 1903185029Spjd} 1904185029Spjd 1905168404Spjd/*ARGSUSED*/ 1906168404Spjdstatic int 1907191990Sattiliozfs_umount(vfs_t *vfsp, int fflag) 1908168404Spjd{ 1909209962Smm kthread_t *td = curthread; 1910168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1911185029Spjd objset_t *os; 1912209962Smm cred_t *cr = td->td_ucred; 1913168404Spjd int ret; 1914168404Spjd 1915185029Spjd ret = secpolicy_fs_unmount(cr, vfsp); 1916185029Spjd if (ret) { 1917212694Smm if (dsl_deleg_access((char *)refstr_value(vfsp->vfs_resource), 1918212694Smm ZFS_DELEG_PERM_MOUNT, cr)) 1919185029Spjd return (ret); 1920185029Spjd } 1921219089Spjd 1922185029Spjd /* 1923185029Spjd * We purge the parent filesystem's vfsp as the parent filesystem 1924185029Spjd * and all of its snapshots have their vnode's v_vfsp set to the 1925185029Spjd * parent's filesystem's vfsp. Note, 'z_parent' is self 1926185029Spjd * referential for non-snapshots. 1927185029Spjd */ 1928185029Spjd (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); 1929168404Spjd 1930168404Spjd /* 1931168404Spjd * Unmount any snapshots mounted under .zfs before unmounting the 1932168404Spjd * dataset itself. 1933168404Spjd */ 1934169170Spjd if (zfsvfs->z_ctldir != NULL) { 1935168404Spjd if ((ret = zfsctl_umount_snapshots(vfsp, fflag, cr)) != 0) 1936168404Spjd return (ret); 1937209962Smm ret = vflush(vfsp, 0, 0, td); 1938168404Spjd ASSERT(ret == EBUSY); 1939168404Spjd if (!(fflag & MS_FORCE)) { 1940168404Spjd if (zfsvfs->z_ctldir->v_count > 1) 1941168404Spjd return (EBUSY); 1942168404Spjd ASSERT(zfsvfs->z_ctldir->v_count == 1); 1943168404Spjd } 1944168404Spjd zfsctl_destroy(zfsvfs); 1945168404Spjd ASSERT(zfsvfs->z_ctldir == NULL); 1946168404Spjd } 1947168404Spjd 1948197459Spjd if (fflag & MS_FORCE) { 1949197459Spjd /* 1950197459Spjd * Mark file system as unmounted before calling 1951197459Spjd * vflush(FORCECLOSE). This way we ensure no future vnops 1952197459Spjd * will be called and risk operating on DOOMED vnodes. 1953197459Spjd */ 1954197459Spjd rrw_enter(&zfsvfs->z_teardown_lock, RW_WRITER, FTAG); 1955197459Spjd zfsvfs->z_unmounted = B_TRUE; 1956197459Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 1957197459Spjd } 1958197459Spjd 1959168404Spjd /* 1960168404Spjd * Flush all the files. 1961168404Spjd */ 1962209962Smm ret = vflush(vfsp, 1, (fflag & MS_FORCE) ? FORCECLOSE : 0, td); 1963168404Spjd if (ret != 0) { 1964168404Spjd if (!zfsvfs->z_issnap) { 1965168404Spjd zfsctl_create(zfsvfs); 1966168404Spjd ASSERT(zfsvfs->z_ctldir != NULL); 1967168404Spjd } 1968168404Spjd return (ret); 1969168404Spjd } 1970168404Spjd 1971248653Swill#ifdef sun 1972185029Spjd if (!(fflag & MS_FORCE)) { 1973185029Spjd /* 1974185029Spjd * Check the number of active vnodes in the file system. 1975185029Spjd * Our count is maintained in the vfs structure, but the 1976185029Spjd * number is off by 1 to indicate a hold on the vfs 1977185029Spjd * structure itself. 1978185029Spjd * 1979185029Spjd * The '.zfs' directory maintains a reference of its 1980185029Spjd * own, and any active references underneath are 1981185029Spjd * reflected in the vnode count. 1982185029Spjd */ 1983185029Spjd if (zfsvfs->z_ctldir == NULL) { 1984185029Spjd if (vfsp->vfs_count > 1) 1985185029Spjd return (EBUSY); 1986185029Spjd } else { 1987185029Spjd if (vfsp->vfs_count > 2 || 1988185029Spjd zfsvfs->z_ctldir->v_count > 1) 1989185029Spjd return (EBUSY); 1990185029Spjd } 1991185029Spjd } 1992248653Swill#endif 1993168404Spjd 1994185029Spjd VERIFY(zfsvfs_teardown(zfsvfs, B_TRUE) == 0); 1995185029Spjd os = zfsvfs->z_os; 1996185029Spjd 1997185029Spjd /* 1998185029Spjd * z_os will be NULL if there was an error in 1999185029Spjd * attempting to reopen zfsvfs. 2000185029Spjd */ 2001185029Spjd if (os != NULL) { 2002168404Spjd /* 2003185029Spjd * Unset the objset user_ptr. 2004168404Spjd */ 2005219089Spjd mutex_enter(&os->os_user_ptr_lock); 2006185029Spjd dmu_objset_set_user(os, NULL); 2007219089Spjd mutex_exit(&os->os_user_ptr_lock); 2008185029Spjd 2009185029Spjd /* 2010185029Spjd * Finally release the objset 2011185029Spjd */ 2012219089Spjd dmu_objset_disown(os, zfsvfs); 2013168404Spjd } 2014168404Spjd 2015185029Spjd /* 2016185029Spjd * We can now safely destroy the '.zfs' directory node. 2017185029Spjd */ 2018185029Spjd if (zfsvfs->z_ctldir != NULL) 2019185029Spjd zfsctl_destroy(zfsvfs); 2020185029Spjd if (zfsvfs->z_issnap) { 2021185029Spjd vnode_t *svp = vfsp->mnt_vnodecovered; 2022185029Spjd 2023197515Spjd if (svp->v_count >= 2) 2024192211Skmacy VN_RELE(svp); 2025185029Spjd } 2026168404Spjd zfs_freevfs(vfsp); 2027168404Spjd 2028168404Spjd return (0); 2029168404Spjd} 2030168404Spjd 2031168404Spjdstatic int 2032168404Spjdzfs_vget(vfs_t *vfsp, ino_t ino, int flags, vnode_t **vpp) 2033168404Spjd{ 2034168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 2035168404Spjd znode_t *zp; 2036168404Spjd int err; 2037168404Spjd 2038197167Spjd /* 2039215397Savg * zfs_zget() can't operate on virtual entries like .zfs/ or 2040211855Spjd * .zfs/snapshot/ directories, that's why we return EOPNOTSUPP. 2041211855Spjd * This will make NFS to switch to LOOKUP instead of using VGET. 2042197167Spjd */ 2043246532Savg if (ino == ZFSCTL_INO_ROOT || ino == ZFSCTL_INO_SNAPDIR || 2044246532Savg (zfsvfs->z_shares_dir != 0 && ino == zfsvfs->z_shares_dir)) 2045197167Spjd return (EOPNOTSUPP); 2046197167Spjd 2047168404Spjd ZFS_ENTER(zfsvfs); 2048168404Spjd err = zfs_zget(zfsvfs, ino, &zp); 2049168404Spjd if (err == 0 && zp->z_unlinked) { 2050168404Spjd VN_RELE(ZTOV(zp)); 2051168404Spjd err = EINVAL; 2052168404Spjd } 2053219089Spjd if (err == 0) 2054219089Spjd *vpp = ZTOV(zp); 2055206667Spjd ZFS_EXIT(zfsvfs); 2056219089Spjd if (err == 0) 2057219089Spjd err = zfs_vnode_lock(*vpp, flags); 2058168404Spjd if (err != 0) 2059168404Spjd *vpp = NULL; 2060245409Skib else 2061245409Skib (*vpp)->v_hash = ino; 2062171063Sdfr return (err); 2063168404Spjd} 2064168404Spjd 2065168404Spjdstatic int 2066196982Spjdzfs_checkexp(vfs_t *vfsp, struct sockaddr *nam, int *extflagsp, 2067196982Spjd struct ucred **credanonp, int *numsecflavors, int **secflavors) 2068196982Spjd{ 2069196982Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 2070196982Spjd 2071196982Spjd /* 2072196982Spjd * If this is regular file system vfsp is the same as 2073196982Spjd * zfsvfs->z_parent->z_vfs, but if it is snapshot, 2074196982Spjd * zfsvfs->z_parent->z_vfs represents parent file system 2075196982Spjd * which we have to use here, because only this file system 2076196982Spjd * has mnt_export configured. 2077196982Spjd */ 2078196982Spjd return (vfs_stdcheckexp(zfsvfs->z_parent->z_vfs, nam, extflagsp, 2079196982Spjd credanonp, numsecflavors, secflavors)); 2080196982Spjd} 2081196982Spjd 2082197151SpjdCTASSERT(SHORT_FID_LEN <= sizeof(struct fid)); 2083197151SpjdCTASSERT(LONG_FID_LEN <= sizeof(struct fid)); 2084196982Spjd 2085196982Spjdstatic int 2086222167Srmacklemzfs_fhtovp(vfs_t *vfsp, fid_t *fidp, int flags, vnode_t **vpp) 2087168404Spjd{ 2088168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 2089168404Spjd znode_t *zp; 2090168404Spjd uint64_t object = 0; 2091168404Spjd uint64_t fid_gen = 0; 2092168404Spjd uint64_t gen_mask; 2093168404Spjd uint64_t zp_gen; 2094219089Spjd int i, err; 2095168404Spjd 2096168404Spjd *vpp = NULL; 2097168404Spjd 2098168404Spjd ZFS_ENTER(zfsvfs); 2099168404Spjd 2100196979Spjd /* 2101197177Spjd * On FreeBSD we can get snapshot's mount point or its parent file 2102197177Spjd * system mount point depending if snapshot is already mounted or not. 2103196979Spjd */ 2104197177Spjd if (zfsvfs->z_parent == zfsvfs && fidp->fid_len == LONG_FID_LEN) { 2105168404Spjd zfid_long_t *zlfid = (zfid_long_t *)fidp; 2106168404Spjd uint64_t objsetid = 0; 2107168404Spjd uint64_t setgen = 0; 2108168404Spjd 2109168404Spjd for (i = 0; i < sizeof (zlfid->zf_setid); i++) 2110168404Spjd objsetid |= ((uint64_t)zlfid->zf_setid[i]) << (8 * i); 2111168404Spjd 2112168404Spjd for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 2113168404Spjd setgen |= ((uint64_t)zlfid->zf_setgen[i]) << (8 * i); 2114168404Spjd 2115168404Spjd ZFS_EXIT(zfsvfs); 2116168404Spjd 2117168404Spjd err = zfsctl_lookup_objset(vfsp, objsetid, &zfsvfs); 2118168404Spjd if (err) 2119168404Spjd return (EINVAL); 2120168404Spjd ZFS_ENTER(zfsvfs); 2121168404Spjd } 2122168404Spjd 2123168404Spjd if (fidp->fid_len == SHORT_FID_LEN || fidp->fid_len == LONG_FID_LEN) { 2124168404Spjd zfid_short_t *zfid = (zfid_short_t *)fidp; 2125168404Spjd 2126168404Spjd for (i = 0; i < sizeof (zfid->zf_object); i++) 2127168404Spjd object |= ((uint64_t)zfid->zf_object[i]) << (8 * i); 2128168404Spjd 2129168404Spjd for (i = 0; i < sizeof (zfid->zf_gen); i++) 2130168404Spjd fid_gen |= ((uint64_t)zfid->zf_gen[i]) << (8 * i); 2131168404Spjd } else { 2132168404Spjd ZFS_EXIT(zfsvfs); 2133168404Spjd return (EINVAL); 2134168404Spjd } 2135168404Spjd 2136246532Savg /* 2137246532Savg * A zero fid_gen means we are in .zfs or the .zfs/snapshot 2138246532Savg * directory tree. If the object == zfsvfs->z_shares_dir, then 2139246532Savg * we are in the .zfs/shares directory tree. 2140246532Savg */ 2141246532Savg if ((fid_gen == 0 && 2142246532Savg (object == ZFSCTL_INO_ROOT || object == ZFSCTL_INO_SNAPDIR)) || 2143246532Savg (zfsvfs->z_shares_dir != 0 && object == zfsvfs->z_shares_dir)) { 2144168404Spjd *vpp = zfsvfs->z_ctldir; 2145168404Spjd ASSERT(*vpp != NULL); 2146168404Spjd if (object == ZFSCTL_INO_SNAPDIR) { 2147168404Spjd VERIFY(zfsctl_root_lookup(*vpp, "snapshot", vpp, NULL, 2148185029Spjd 0, NULL, NULL, NULL, NULL, NULL) == 0); 2149246532Savg } else if (object == zfsvfs->z_shares_dir) { 2150246532Savg VERIFY(zfsctl_root_lookup(*vpp, "shares", vpp, NULL, 2151246532Savg 0, NULL, NULL, NULL, NULL, NULL) == 0); 2152168404Spjd } else { 2153168404Spjd VN_HOLD(*vpp); 2154168404Spjd } 2155206667Spjd ZFS_EXIT(zfsvfs); 2156243519Savg err = zfs_vnode_lock(*vpp, flags); 2157219089Spjd if (err != 0) 2158219089Spjd *vpp = NULL; 2159219089Spjd return (err); 2160168404Spjd } 2161168404Spjd 2162168404Spjd gen_mask = -1ULL >> (64 - 8 * i); 2163168404Spjd 2164168404Spjd dprintf("getting %llu [%u mask %llx]\n", object, fid_gen, gen_mask); 2165168404Spjd if (err = zfs_zget(zfsvfs, object, &zp)) { 2166168404Spjd ZFS_EXIT(zfsvfs); 2167168404Spjd return (err); 2168168404Spjd } 2169219089Spjd (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), &zp_gen, 2170219089Spjd sizeof (uint64_t)); 2171219089Spjd zp_gen = zp_gen & gen_mask; 2172168404Spjd if (zp_gen == 0) 2173168404Spjd zp_gen = 1; 2174168404Spjd if (zp->z_unlinked || zp_gen != fid_gen) { 2175168404Spjd dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen, fid_gen); 2176168404Spjd VN_RELE(ZTOV(zp)); 2177168404Spjd ZFS_EXIT(zfsvfs); 2178168404Spjd return (EINVAL); 2179168404Spjd } 2180168404Spjd 2181219089Spjd *vpp = ZTOV(zp); 2182206667Spjd ZFS_EXIT(zfsvfs); 2183222199Srmacklem err = zfs_vnode_lock(*vpp, flags | LK_RETRY); 2184219089Spjd if (err == 0) 2185219089Spjd vnode_create_vobject(*vpp, zp->z_size, curthread); 2186219089Spjd else 2187219089Spjd *vpp = NULL; 2188219089Spjd return (err); 2189168404Spjd} 2190168404Spjd 2191185029Spjd/* 2192185029Spjd * Block out VOPs and close zfsvfs_t::z_os 2193185029Spjd * 2194185029Spjd * Note, if successful, then we return with the 'z_teardown_lock' and 2195185029Spjd * 'z_teardown_inactive_lock' write held. 2196185029Spjd */ 2197185029Spjdint 2198219089Spjdzfs_suspend_fs(zfsvfs_t *zfsvfs) 2199168404Spjd{ 2200185029Spjd int error; 2201168404Spjd 2202185029Spjd if ((error = zfsvfs_teardown(zfsvfs, B_FALSE)) != 0) 2203185029Spjd return (error); 2204219089Spjd dmu_objset_disown(zfsvfs->z_os, zfsvfs); 2205168404Spjd 2206185029Spjd return (0); 2207185029Spjd} 2208168404Spjd 2209185029Spjd/* 2210185029Spjd * Reopen zfsvfs_t::z_os and release VOPs. 2211185029Spjd */ 2212185029Spjdint 2213219089Spjdzfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname) 2214185029Spjd{ 2215185029Spjd int err; 2216168404Spjd 2217185029Spjd ASSERT(RRW_WRITE_HELD(&zfsvfs->z_teardown_lock)); 2218185029Spjd ASSERT(RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock)); 2219185029Spjd 2220219089Spjd err = dmu_objset_own(osname, DMU_OST_ZFS, B_FALSE, zfsvfs, 2221219089Spjd &zfsvfs->z_os); 2222185029Spjd if (err) { 2223185029Spjd zfsvfs->z_os = NULL; 2224185029Spjd } else { 2225185029Spjd znode_t *zp; 2226219089Spjd uint64_t sa_obj = 0; 2227185029Spjd 2228219089Spjd /* 2229219089Spjd * Make sure version hasn't changed 2230219089Spjd */ 2231219089Spjd 2232219089Spjd err = zfs_get_zplprop(zfsvfs->z_os, ZFS_PROP_VERSION, 2233219089Spjd &zfsvfs->z_version); 2234219089Spjd 2235219089Spjd if (err) 2236219089Spjd goto bail; 2237219089Spjd 2238219089Spjd err = zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ, 2239219089Spjd ZFS_SA_ATTRS, 8, 1, &sa_obj); 2240219089Spjd 2241219089Spjd if (err && zfsvfs->z_version >= ZPL_VERSION_SA) 2242219089Spjd goto bail; 2243219089Spjd 2244219089Spjd if ((err = sa_setup(zfsvfs->z_os, sa_obj, 2245219089Spjd zfs_attr_table, ZPL_END, &zfsvfs->z_attr_table)) != 0) 2246219089Spjd goto bail; 2247219089Spjd 2248219089Spjd if (zfsvfs->z_version >= ZPL_VERSION_SA) 2249219089Spjd sa_register_update_callback(zfsvfs->z_os, 2250219089Spjd zfs_sa_upgrade); 2251219089Spjd 2252185029Spjd VERIFY(zfsvfs_setup(zfsvfs, B_FALSE) == 0); 2253185029Spjd 2254219089Spjd zfs_set_fuid_feature(zfsvfs); 2255219089Spjd 2256185029Spjd /* 2257185029Spjd * Attempt to re-establish all the active znodes with 2258185029Spjd * their dbufs. If a zfs_rezget() fails, then we'll let 2259185029Spjd * any potential callers discover that via ZFS_ENTER_VERIFY_VP 2260185029Spjd * when they try to use their znode. 2261185029Spjd */ 2262185029Spjd mutex_enter(&zfsvfs->z_znodes_lock); 2263185029Spjd for (zp = list_head(&zfsvfs->z_all_znodes); zp; 2264185029Spjd zp = list_next(&zfsvfs->z_all_znodes, zp)) { 2265185029Spjd (void) zfs_rezget(zp); 2266185029Spjd } 2267185029Spjd mutex_exit(&zfsvfs->z_znodes_lock); 2268168404Spjd } 2269168404Spjd 2270219089Spjdbail: 2271185029Spjd /* release the VOPs */ 2272185029Spjd rw_exit(&zfsvfs->z_teardown_inactive_lock); 2273185029Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 2274185029Spjd 2275185029Spjd if (err) { 2276185029Spjd /* 2277219089Spjd * Since we couldn't reopen zfsvfs::z_os, or 2278219089Spjd * setup the sa framework force unmount this file system. 2279185029Spjd */ 2280185029Spjd if (vn_vfswlock(zfsvfs->z_vfs->vfs_vnodecovered) == 0) 2281185029Spjd (void) dounmount(zfsvfs->z_vfs, MS_FORCE, curthread); 2282168404Spjd } 2283185029Spjd return (err); 2284168404Spjd} 2285168404Spjd 2286168404Spjdstatic void 2287168404Spjdzfs_freevfs(vfs_t *vfsp) 2288168404Spjd{ 2289168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 2290168404Spjd 2291215260Smm#ifdef sun 2292209962Smm /* 2293209962Smm * If this is a snapshot, we have an extra VFS_HOLD on our parent 2294219089Spjd * from zfs_mount(). Release it here. If we came through 2295219089Spjd * zfs_mountroot() instead, we didn't grab an extra hold, so 2296219089Spjd * skip the VFS_RELE for rootvfs. 2297209962Smm */ 2298219089Spjd if (zfsvfs->z_issnap && (vfsp != rootvfs)) 2299209962Smm VFS_RELE(zfsvfs->z_parent->z_vfs); 2300215260Smm#endif /* sun */ 2301168404Spjd 2302209962Smm zfsvfs_free(zfsvfs); 2303185029Spjd 2304168404Spjd atomic_add_32(&zfs_active_fs_count, -1); 2305168404Spjd} 2306168404Spjd 2307172135Spjd#ifdef __i386__ 2308172135Spjdstatic int desiredvnodes_backup; 2309172135Spjd#endif 2310172135Spjd 2311172135Spjdstatic void 2312172135Spjdzfs_vnodes_adjust(void) 2313172135Spjd{ 2314172135Spjd#ifdef __i386__ 2315185029Spjd int newdesiredvnodes; 2316172135Spjd 2317172135Spjd desiredvnodes_backup = desiredvnodes; 2318172135Spjd 2319172135Spjd /* 2320172135Spjd * We calculate newdesiredvnodes the same way it is done in 2321172135Spjd * vntblinit(). If it is equal to desiredvnodes, it means that 2322172135Spjd * it wasn't tuned by the administrator and we can tune it down. 2323172135Spjd */ 2324185029Spjd newdesiredvnodes = min(maxproc + cnt.v_page_count / 4, 2 * 2325185029Spjd vm_kmem_size / (5 * (sizeof(struct vm_object) + 2326185029Spjd sizeof(struct vnode)))); 2327185029Spjd if (newdesiredvnodes == desiredvnodes) 2328185029Spjd desiredvnodes = (3 * newdesiredvnodes) / 4; 2329172135Spjd#endif 2330172135Spjd} 2331172135Spjd 2332172135Spjdstatic void 2333172135Spjdzfs_vnodes_adjust_back(void) 2334172135Spjd{ 2335172135Spjd 2336172135Spjd#ifdef __i386__ 2337172135Spjd desiredvnodes = desiredvnodes_backup; 2338172135Spjd#endif 2339172135Spjd} 2340172135Spjd 2341168404Spjdvoid 2342168404Spjdzfs_init(void) 2343168404Spjd{ 2344168404Spjd 2345236884Smm printf("ZFS filesystem version: " ZPL_VERSION_STRING "\n"); 2346168404Spjd 2347168404Spjd /* 2348219089Spjd * Initialize .zfs directory structures 2349168404Spjd */ 2350219089Spjd zfsctl_init(); 2351168404Spjd 2352168404Spjd /* 2353219089Spjd * Initialize znode cache, vnode ops, etc... 2354168404Spjd */ 2355219089Spjd zfs_znode_init(); 2356172135Spjd 2357172135Spjd /* 2358219089Spjd * Reduce number of vnodes. Originally number of vnodes is calculated 2359172135Spjd * with UFS inode in mind. We reduce it here, because it's too big for 2360172135Spjd * ZFS/i386. 2361172135Spjd */ 2362172135Spjd zfs_vnodes_adjust(); 2363209962Smm 2364209962Smm dmu_objset_register_type(DMU_OST_ZFS, zfs_space_delta_cb); 2365168404Spjd} 2366168404Spjd 2367168404Spjdvoid 2368168404Spjdzfs_fini(void) 2369168404Spjd{ 2370168404Spjd zfsctl_fini(); 2371168404Spjd zfs_znode_fini(); 2372172135Spjd zfs_vnodes_adjust_back(); 2373168404Spjd} 2374168404Spjd 2375168404Spjdint 2376168404Spjdzfs_busy(void) 2377168404Spjd{ 2378168404Spjd return (zfs_active_fs_count != 0); 2379168404Spjd} 2380185029Spjd 2381185029Spjdint 2382209962Smmzfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers) 2383185029Spjd{ 2384185029Spjd int error; 2385209962Smm objset_t *os = zfsvfs->z_os; 2386185029Spjd dmu_tx_t *tx; 2387185029Spjd 2388185029Spjd if (newvers < ZPL_VERSION_INITIAL || newvers > ZPL_VERSION) 2389185029Spjd return (EINVAL); 2390185029Spjd 2391209962Smm if (newvers < zfsvfs->z_version) 2392209962Smm return (EINVAL); 2393185029Spjd 2394219089Spjd if (zfs_spa_version_map(newvers) > 2395219089Spjd spa_version(dmu_objset_spa(zfsvfs->z_os))) 2396219089Spjd return (ENOTSUP); 2397219089Spjd 2398185029Spjd tx = dmu_tx_create(os); 2399209962Smm dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_FALSE, ZPL_VERSION_STR); 2400219089Spjd if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) { 2401219089Spjd dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE, 2402219089Spjd ZFS_SA_ATTRS); 2403219089Spjd dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 2404219089Spjd } 2405185029Spjd error = dmu_tx_assign(tx, TXG_WAIT); 2406185029Spjd if (error) { 2407185029Spjd dmu_tx_abort(tx); 2408209962Smm return (error); 2409185029Spjd } 2410219089Spjd 2411209962Smm error = zap_update(os, MASTER_NODE_OBJ, ZPL_VERSION_STR, 2412209962Smm 8, 1, &newvers, tx); 2413185029Spjd 2414209962Smm if (error) { 2415209962Smm dmu_tx_commit(tx); 2416209962Smm return (error); 2417209962Smm } 2418209962Smm 2419219089Spjd if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) { 2420219089Spjd uint64_t sa_obj; 2421219089Spjd 2422219089Spjd ASSERT3U(spa_version(dmu_objset_spa(zfsvfs->z_os)), >=, 2423219089Spjd SPA_VERSION_SA); 2424219089Spjd sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE, 2425219089Spjd DMU_OT_NONE, 0, tx); 2426219089Spjd 2427219089Spjd error = zap_add(os, MASTER_NODE_OBJ, 2428219089Spjd ZFS_SA_ATTRS, 8, 1, &sa_obj, tx); 2429240415Smm ASSERT0(error); 2430219089Spjd 2431219089Spjd VERIFY(0 == sa_set_sa_object(os, sa_obj)); 2432219089Spjd sa_register_update_callback(os, zfs_sa_upgrade); 2433219089Spjd } 2434219089Spjd 2435248571Smm spa_history_log_internal_ds(dmu_objset_ds(os), "upgrade", tx, 2436248571Smm "from %llu to %llu", zfsvfs->z_version, newvers); 2437209962Smm 2438185029Spjd dmu_tx_commit(tx); 2439185029Spjd 2440209962Smm zfsvfs->z_version = newvers; 2441209962Smm 2442219089Spjd zfs_set_fuid_feature(zfsvfs); 2443209962Smm 2444209962Smm return (0); 2445185029Spjd} 2446219089Spjd 2447185029Spjd/* 2448185029Spjd * Read a property stored within the master node. 2449185029Spjd */ 2450185029Spjdint 2451185029Spjdzfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value) 2452185029Spjd{ 2453185029Spjd const char *pname; 2454185029Spjd int error = ENOENT; 2455185029Spjd 2456185029Spjd /* 2457185029Spjd * Look up the file system's value for the property. For the 2458185029Spjd * version property, we look up a slightly different string. 2459185029Spjd */ 2460185029Spjd if (prop == ZFS_PROP_VERSION) 2461185029Spjd pname = ZPL_VERSION_STR; 2462185029Spjd else 2463185029Spjd pname = zfs_prop_to_name(prop); 2464185029Spjd 2465185029Spjd if (os != NULL) 2466185029Spjd error = zap_lookup(os, MASTER_NODE_OBJ, pname, 8, 1, value); 2467185029Spjd 2468185029Spjd if (error == ENOENT) { 2469185029Spjd /* No value set, use the default value */ 2470185029Spjd switch (prop) { 2471185029Spjd case ZFS_PROP_VERSION: 2472185029Spjd *value = ZPL_VERSION; 2473185029Spjd break; 2474185029Spjd case ZFS_PROP_NORMALIZE: 2475185029Spjd case ZFS_PROP_UTF8ONLY: 2476185029Spjd *value = 0; 2477185029Spjd break; 2478185029Spjd case ZFS_PROP_CASE: 2479185029Spjd *value = ZFS_CASE_SENSITIVE; 2480185029Spjd break; 2481185029Spjd default: 2482185029Spjd return (error); 2483185029Spjd } 2484185029Spjd error = 0; 2485185029Spjd } 2486185029Spjd return (error); 2487185029Spjd} 2488226676Spjd 2489226676Spjd#ifdef _KERNEL 2490226676Spjdvoid 2491226676Spjdzfsvfs_update_fromname(const char *oldname, const char *newname) 2492226676Spjd{ 2493226676Spjd char tmpbuf[MAXPATHLEN]; 2494226676Spjd struct mount *mp; 2495226676Spjd char *fromname; 2496226676Spjd size_t oldlen; 2497226676Spjd 2498226676Spjd oldlen = strlen(oldname); 2499226676Spjd 2500226676Spjd mtx_lock(&mountlist_mtx); 2501226676Spjd TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2502226676Spjd fromname = mp->mnt_stat.f_mntfromname; 2503226676Spjd if (strcmp(fromname, oldname) == 0) { 2504226676Spjd (void)strlcpy(fromname, newname, 2505226676Spjd sizeof(mp->mnt_stat.f_mntfromname)); 2506226676Spjd continue; 2507226676Spjd } 2508226676Spjd if (strncmp(fromname, oldname, oldlen) == 0 && 2509226700Spjd (fromname[oldlen] == '/' || fromname[oldlen] == '@')) { 2510226676Spjd (void)snprintf(tmpbuf, sizeof(tmpbuf), "%s%s", 2511226676Spjd newname, fromname + oldlen); 2512226676Spjd (void)strlcpy(fromname, tmpbuf, 2513226676Spjd sizeof(mp->mnt_stat.f_mntfromname)); 2514226676Spjd continue; 2515226676Spjd } 2516226676Spjd } 2517226676Spjd mtx_unlock(&mountlist_mtx); 2518226676Spjd} 2519226676Spjd#endif 2520