zfs_vfsops.c revision 242554
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. 23229565Smm * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>. 24229565Smm * All rights reserved. 25168404Spjd */ 26168404Spjd 27219089Spjd/* Portions Copyright 2010 Robert Milkowski */ 28219089Spjd 29168404Spjd#include <sys/types.h> 30168404Spjd#include <sys/param.h> 31168404Spjd#include <sys/systm.h> 32168404Spjd#include <sys/kernel.h> 33168404Spjd#include <sys/sysmacros.h> 34168404Spjd#include <sys/kmem.h> 35168404Spjd#include <sys/acl.h> 36168404Spjd#include <sys/vnode.h> 37168404Spjd#include <sys/vfs.h> 38168404Spjd#include <sys/mntent.h> 39168404Spjd#include <sys/mount.h> 40168404Spjd#include <sys/cmn_err.h> 41168404Spjd#include <sys/zfs_znode.h> 42168404Spjd#include <sys/zfs_dir.h> 43168404Spjd#include <sys/zil.h> 44168404Spjd#include <sys/fs/zfs.h> 45168404Spjd#include <sys/dmu.h> 46168404Spjd#include <sys/dsl_prop.h> 47168404Spjd#include <sys/dsl_dataset.h> 48185029Spjd#include <sys/dsl_deleg.h> 49168404Spjd#include <sys/spa.h> 50168404Spjd#include <sys/zap.h> 51219089Spjd#include <sys/sa.h> 52168404Spjd#include <sys/varargs.h> 53168962Spjd#include <sys/policy.h> 54168404Spjd#include <sys/atomic.h> 55168404Spjd#include <sys/zfs_ioctl.h> 56168404Spjd#include <sys/zfs_ctldir.h> 57185029Spjd#include <sys/zfs_fuid.h> 58168962Spjd#include <sys/sunddi.h> 59168404Spjd#include <sys/dnlc.h> 60185029Spjd#include <sys/dmu_objset.h> 61185029Spjd#include <sys/spa_boot.h> 62219089Spjd#include <sys/sa.h> 63232728Smm#include <sys/jail.h> 64219089Spjd#include "zfs_comutil.h" 65168404Spjd 66168404Spjdstruct mtx zfs_debug_mtx; 67168404SpjdMTX_SYSINIT(zfs_debug_mtx, &zfs_debug_mtx, "zfs_debug", MTX_DEF); 68185029Spjd 69168404SpjdSYSCTL_NODE(_vfs, OID_AUTO, zfs, CTLFLAG_RW, 0, "ZFS file system"); 70185029Spjd 71219089Spjdint zfs_super_owner; 72185029SpjdSYSCTL_INT(_vfs_zfs, OID_AUTO, super_owner, CTLFLAG_RW, &zfs_super_owner, 0, 73185029Spjd "File system owner can perform privileged operation on his file systems"); 74185029Spjd 75219089Spjdint zfs_debug_level; 76168713SpjdTUNABLE_INT("vfs.zfs.debug", &zfs_debug_level); 77168404SpjdSYSCTL_INT(_vfs_zfs, OID_AUTO, debug, CTLFLAG_RW, &zfs_debug_level, 0, 78168404Spjd "Debug level"); 79168404Spjd 80185029SpjdSYSCTL_NODE(_vfs_zfs, OID_AUTO, version, CTLFLAG_RD, 0, "ZFS versions"); 81185029Spjdstatic int zfs_version_acl = ZFS_ACL_VERSION; 82185029SpjdSYSCTL_INT(_vfs_zfs_version, OID_AUTO, acl, CTLFLAG_RD, &zfs_version_acl, 0, 83185029Spjd "ZFS_ACL_VERSION"); 84185029Spjdstatic int zfs_version_spa = SPA_VERSION; 85185029SpjdSYSCTL_INT(_vfs_zfs_version, OID_AUTO, spa, CTLFLAG_RD, &zfs_version_spa, 0, 86185029Spjd "SPA_VERSION"); 87185029Spjdstatic int zfs_version_zpl = ZPL_VERSION; 88185029SpjdSYSCTL_INT(_vfs_zfs_version, OID_AUTO, zpl, CTLFLAG_RD, &zfs_version_zpl, 0, 89185029Spjd "ZPL_VERSION"); 90185029Spjd 91191990Sattiliostatic int zfs_mount(vfs_t *vfsp); 92191990Sattiliostatic int zfs_umount(vfs_t *vfsp, int fflag); 93191990Sattiliostatic int zfs_root(vfs_t *vfsp, int flags, vnode_t **vpp); 94191990Sattiliostatic int zfs_statfs(vfs_t *vfsp, struct statfs *statp); 95168404Spjdstatic int zfs_vget(vfs_t *vfsp, ino_t ino, int flags, vnode_t **vpp); 96191990Sattiliostatic int zfs_sync(vfs_t *vfsp, int waitfor); 97196982Spjdstatic int zfs_checkexp(vfs_t *vfsp, struct sockaddr *nam, int *extflagsp, 98196982Spjd struct ucred **credanonp, int *numsecflavors, int **secflavors); 99222167Srmacklemstatic int zfs_fhtovp(vfs_t *vfsp, fid_t *fidp, int flags, vnode_t **vpp); 100168404Spjdstatic void zfs_objset_close(zfsvfs_t *zfsvfs); 101168404Spjdstatic void zfs_freevfs(vfs_t *vfsp); 102168404Spjd 103168404Spjdstatic struct vfsops zfs_vfsops = { 104168404Spjd .vfs_mount = zfs_mount, 105168404Spjd .vfs_unmount = zfs_umount, 106168404Spjd .vfs_root = zfs_root, 107168404Spjd .vfs_statfs = zfs_statfs, 108168404Spjd .vfs_vget = zfs_vget, 109168404Spjd .vfs_sync = zfs_sync, 110196982Spjd .vfs_checkexp = zfs_checkexp, 111168404Spjd .vfs_fhtovp = zfs_fhtovp, 112168404Spjd}; 113168404Spjd 114185029SpjdVFS_SET(zfs_vfsops, zfs, VFCF_JAIL | VFCF_DELEGADMIN); 115168404Spjd 116168404Spjd/* 117168404Spjd * We need to keep a count of active fs's. 118168404Spjd * This is necessary to prevent our module 119168404Spjd * from being unloaded after a umount -f 120168404Spjd */ 121168404Spjdstatic uint32_t zfs_active_fs_count = 0; 122168404Spjd 123168404Spjd/*ARGSUSED*/ 124168404Spjdstatic int 125191990Sattiliozfs_sync(vfs_t *vfsp, int waitfor) 126168404Spjd{ 127168404Spjd 128168404Spjd /* 129168404Spjd * Data integrity is job one. We don't want a compromised kernel 130168404Spjd * writing to the storage pool, so we never sync during panic. 131168404Spjd */ 132168404Spjd if (panicstr) 133168404Spjd return (0); 134168404Spjd 135168404Spjd if (vfsp != NULL) { 136168404Spjd /* 137168404Spjd * Sync a specific filesystem. 138168404Spjd */ 139168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 140209962Smm dsl_pool_t *dp; 141168404Spjd int error; 142168404Spjd 143191990Sattilio error = vfs_stdsync(vfsp, waitfor); 144168404Spjd if (error != 0) 145168404Spjd return (error); 146168404Spjd 147168404Spjd ZFS_ENTER(zfsvfs); 148209962Smm dp = dmu_objset_pool(zfsvfs->z_os); 149209962Smm 150209962Smm /* 151209962Smm * If the system is shutting down, then skip any 152209962Smm * filesystems which may exist on a suspended pool. 153209962Smm */ 154209962Smm if (sys_shutdown && spa_suspended(dp->dp_spa)) { 155209962Smm ZFS_EXIT(zfsvfs); 156209962Smm return (0); 157209962Smm } 158209962Smm 159168404Spjd if (zfsvfs->z_log != NULL) 160219089Spjd zil_commit(zfsvfs->z_log, 0); 161219089Spjd 162168404Spjd ZFS_EXIT(zfsvfs); 163168404Spjd } else { 164168404Spjd /* 165168404Spjd * Sync all ZFS filesystems. This is what happens when you 166168404Spjd * run sync(1M). Unlike other filesystems, ZFS honors the 167168404Spjd * request by waiting for all pools to commit all dirty data. 168168404Spjd */ 169168404Spjd spa_sync_allpools(); 170168404Spjd } 171168404Spjd 172168404Spjd return (0); 173168404Spjd} 174168404Spjd 175219089Spjd#ifndef __FreeBSD__ 176219089Spjdstatic int 177219089Spjdzfs_create_unique_device(dev_t *dev) 178219089Spjd{ 179219089Spjd major_t new_major; 180219089Spjd 181219089Spjd do { 182219089Spjd ASSERT3U(zfs_minor, <=, MAXMIN32); 183219089Spjd minor_t start = zfs_minor; 184219089Spjd do { 185219089Spjd mutex_enter(&zfs_dev_mtx); 186219089Spjd if (zfs_minor >= MAXMIN32) { 187219089Spjd /* 188219089Spjd * If we're still using the real major 189219089Spjd * keep out of /dev/zfs and /dev/zvol minor 190219089Spjd * number space. If we're using a getudev()'ed 191219089Spjd * major number, we can use all of its minors. 192219089Spjd */ 193219089Spjd if (zfs_major == ddi_name_to_major(ZFS_DRIVER)) 194219089Spjd zfs_minor = ZFS_MIN_MINOR; 195219089Spjd else 196219089Spjd zfs_minor = 0; 197219089Spjd } else { 198219089Spjd zfs_minor++; 199219089Spjd } 200219089Spjd *dev = makedevice(zfs_major, zfs_minor); 201219089Spjd mutex_exit(&zfs_dev_mtx); 202219089Spjd } while (vfs_devismounted(*dev) && zfs_minor != start); 203219089Spjd if (zfs_minor == start) { 204219089Spjd /* 205219089Spjd * We are using all ~262,000 minor numbers for the 206219089Spjd * current major number. Create a new major number. 207219089Spjd */ 208219089Spjd if ((new_major = getudev()) == (major_t)-1) { 209219089Spjd cmn_err(CE_WARN, 210219089Spjd "zfs_mount: Can't get unique major " 211219089Spjd "device number."); 212219089Spjd return (-1); 213219089Spjd } 214219089Spjd mutex_enter(&zfs_dev_mtx); 215219089Spjd zfs_major = new_major; 216219089Spjd zfs_minor = 0; 217219089Spjd 218219089Spjd mutex_exit(&zfs_dev_mtx); 219219089Spjd } else { 220219089Spjd break; 221219089Spjd } 222219089Spjd /* CONSTANTCONDITION */ 223219089Spjd } while (1); 224219089Spjd 225219089Spjd return (0); 226219089Spjd} 227219089Spjd#endif /* !__FreeBSD__ */ 228219089Spjd 229168404Spjdstatic void 230168404Spjdatime_changed_cb(void *arg, uint64_t newval) 231168404Spjd{ 232168404Spjd zfsvfs_t *zfsvfs = arg; 233168404Spjd 234168404Spjd if (newval == TRUE) { 235168404Spjd zfsvfs->z_atime = TRUE; 236168404Spjd zfsvfs->z_vfs->vfs_flag &= ~MNT_NOATIME; 237168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME); 238168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_ATIME, NULL, 0); 239168404Spjd } else { 240168404Spjd zfsvfs->z_atime = FALSE; 241168404Spjd zfsvfs->z_vfs->vfs_flag |= MNT_NOATIME; 242168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_ATIME); 243168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME, NULL, 0); 244168404Spjd } 245168404Spjd} 246168404Spjd 247168404Spjdstatic void 248168404Spjdxattr_changed_cb(void *arg, uint64_t newval) 249168404Spjd{ 250168404Spjd zfsvfs_t *zfsvfs = arg; 251168404Spjd 252168404Spjd if (newval == TRUE) { 253168404Spjd /* XXX locking on vfs_flag? */ 254168404Spjd#ifdef TODO 255168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_XATTR; 256168404Spjd#endif 257168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR); 258168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_XATTR, NULL, 0); 259168404Spjd } else { 260168404Spjd /* XXX locking on vfs_flag? */ 261168404Spjd#ifdef TODO 262168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_XATTR; 263168404Spjd#endif 264168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_XATTR); 265168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR, NULL, 0); 266168404Spjd } 267168404Spjd} 268168404Spjd 269168404Spjdstatic void 270168404Spjdblksz_changed_cb(void *arg, uint64_t newval) 271168404Spjd{ 272168404Spjd zfsvfs_t *zfsvfs = arg; 273168404Spjd 274168404Spjd if (newval < SPA_MINBLOCKSIZE || 275168404Spjd newval > SPA_MAXBLOCKSIZE || !ISP2(newval)) 276168404Spjd newval = SPA_MAXBLOCKSIZE; 277168404Spjd 278168404Spjd zfsvfs->z_max_blksz = newval; 279204101Spjd zfsvfs->z_vfs->mnt_stat.f_iosize = newval; 280168404Spjd} 281168404Spjd 282168404Spjdstatic void 283168404Spjdreadonly_changed_cb(void *arg, uint64_t newval) 284168404Spjd{ 285168404Spjd zfsvfs_t *zfsvfs = arg; 286168404Spjd 287168404Spjd if (newval) { 288168404Spjd /* XXX locking on vfs_flag? */ 289168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_RDONLY; 290168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RW); 291168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RO, NULL, 0); 292168404Spjd } else { 293168404Spjd /* XXX locking on vfs_flag? */ 294168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; 295168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RO); 296168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RW, NULL, 0); 297168404Spjd } 298168404Spjd} 299168404Spjd 300168404Spjdstatic void 301168404Spjdsetuid_changed_cb(void *arg, uint64_t newval) 302168404Spjd{ 303168404Spjd zfsvfs_t *zfsvfs = arg; 304168404Spjd 305168404Spjd if (newval == FALSE) { 306168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_NOSETUID; 307168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_SETUID); 308168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID, NULL, 0); 309168404Spjd } else { 310168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_NOSETUID; 311168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID); 312168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_SETUID, NULL, 0); 313168404Spjd } 314168404Spjd} 315168404Spjd 316168404Spjdstatic void 317168404Spjdexec_changed_cb(void *arg, uint64_t newval) 318168404Spjd{ 319168404Spjd zfsvfs_t *zfsvfs = arg; 320168404Spjd 321168404Spjd if (newval == FALSE) { 322168404Spjd zfsvfs->z_vfs->vfs_flag |= VFS_NOEXEC; 323168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_EXEC); 324168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC, NULL, 0); 325168404Spjd } else { 326168404Spjd zfsvfs->z_vfs->vfs_flag &= ~VFS_NOEXEC; 327168404Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC); 328168404Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_EXEC, NULL, 0); 329168404Spjd } 330168404Spjd} 331168404Spjd 332185029Spjd/* 333185029Spjd * The nbmand mount option can be changed at mount time. 334185029Spjd * We can't allow it to be toggled on live file systems or incorrect 335185029Spjd * behavior may be seen from cifs clients 336185029Spjd * 337185029Spjd * This property isn't registered via dsl_prop_register(), but this callback 338185029Spjd * will be called when a file system is first mounted 339185029Spjd */ 340168404Spjdstatic void 341185029Spjdnbmand_changed_cb(void *arg, uint64_t newval) 342185029Spjd{ 343185029Spjd zfsvfs_t *zfsvfs = arg; 344185029Spjd if (newval == FALSE) { 345185029Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND); 346185029Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND, NULL, 0); 347185029Spjd } else { 348185029Spjd vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND); 349185029Spjd vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND, NULL, 0); 350185029Spjd } 351185029Spjd} 352185029Spjd 353185029Spjdstatic void 354168404Spjdsnapdir_changed_cb(void *arg, uint64_t newval) 355168404Spjd{ 356168404Spjd zfsvfs_t *zfsvfs = arg; 357168404Spjd 358168404Spjd zfsvfs->z_show_ctldir = newval; 359168404Spjd} 360168404Spjd 361168404Spjdstatic void 362185029Spjdvscan_changed_cb(void *arg, uint64_t newval) 363185029Spjd{ 364185029Spjd zfsvfs_t *zfsvfs = arg; 365185029Spjd 366185029Spjd zfsvfs->z_vscan = newval; 367185029Spjd} 368185029Spjd 369185029Spjdstatic void 370224174Smmacl_mode_changed_cb(void *arg, uint64_t newval) 371224174Smm{ 372224174Smm zfsvfs_t *zfsvfs = arg; 373224174Smm 374224174Smm zfsvfs->z_acl_mode = newval; 375224174Smm} 376224174Smm 377224174Smmstatic void 378168404Spjdacl_inherit_changed_cb(void *arg, uint64_t newval) 379168404Spjd{ 380168404Spjd zfsvfs_t *zfsvfs = arg; 381168404Spjd 382168404Spjd zfsvfs->z_acl_inherit = newval; 383168404Spjd} 384168404Spjd 385168404Spjdstatic int 386168404Spjdzfs_register_callbacks(vfs_t *vfsp) 387168404Spjd{ 388168404Spjd struct dsl_dataset *ds = NULL; 389168404Spjd objset_t *os = NULL; 390168404Spjd zfsvfs_t *zfsvfs = NULL; 391185029Spjd uint64_t nbmand; 392219089Spjd int readonly, do_readonly = B_FALSE; 393219089Spjd int setuid, do_setuid = B_FALSE; 394219089Spjd int exec, do_exec = B_FALSE; 395219089Spjd int xattr, do_xattr = B_FALSE; 396219089Spjd int atime, do_atime = B_FALSE; 397168404Spjd int error = 0; 398168404Spjd 399168404Spjd ASSERT(vfsp); 400168404Spjd zfsvfs = vfsp->vfs_data; 401168404Spjd ASSERT(zfsvfs); 402168404Spjd os = zfsvfs->z_os; 403168404Spjd 404168404Spjd /* 405196965Spjd * This function can be called for a snapshot when we update snapshot's 406196965Spjd * mount point, which isn't really supported. 407196965Spjd */ 408196965Spjd if (dmu_objset_is_snapshot(os)) 409196965Spjd return (EOPNOTSUPP); 410196965Spjd 411196965Spjd /* 412168404Spjd * The act of registering our callbacks will destroy any mount 413168404Spjd * options we may have. In order to enable temporary overrides 414168404Spjd * of mount options, we stash away the current values and 415168404Spjd * restore them after we register the callbacks. 416168404Spjd */ 417219089Spjd if (vfs_optionisset(vfsp, MNTOPT_RO, NULL) || 418219089Spjd !spa_writeable(dmu_objset_spa(os))) { 419168404Spjd readonly = B_TRUE; 420168404Spjd do_readonly = B_TRUE; 421168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) { 422168404Spjd readonly = B_FALSE; 423168404Spjd do_readonly = B_TRUE; 424168404Spjd } 425168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) { 426168404Spjd setuid = B_FALSE; 427168404Spjd do_setuid = B_TRUE; 428168404Spjd } else { 429168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) { 430168404Spjd setuid = B_FALSE; 431168404Spjd do_setuid = B_TRUE; 432168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) { 433168404Spjd setuid = B_TRUE; 434168404Spjd do_setuid = B_TRUE; 435168404Spjd } 436168404Spjd } 437168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) { 438168404Spjd exec = B_FALSE; 439168404Spjd do_exec = B_TRUE; 440168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) { 441168404Spjd exec = B_TRUE; 442168404Spjd do_exec = B_TRUE; 443168404Spjd } 444168404Spjd if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL)) { 445168404Spjd xattr = B_FALSE; 446168404Spjd do_xattr = B_TRUE; 447168404Spjd } else if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL)) { 448168404Spjd xattr = B_TRUE; 449168404Spjd do_xattr = B_TRUE; 450168404Spjd } 451185029Spjd if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) { 452185029Spjd atime = B_FALSE; 453185029Spjd do_atime = B_TRUE; 454185029Spjd } else if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL)) { 455185029Spjd atime = B_TRUE; 456185029Spjd do_atime = B_TRUE; 457185029Spjd } 458168404Spjd 459168404Spjd /* 460185029Spjd * nbmand is a special property. It can only be changed at 461185029Spjd * mount time. 462185029Spjd * 463185029Spjd * This is weird, but it is documented to only be changeable 464185029Spjd * at mount time. 465185029Spjd */ 466185029Spjd if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) { 467185029Spjd nbmand = B_FALSE; 468185029Spjd } else if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) { 469185029Spjd nbmand = B_TRUE; 470185029Spjd } else { 471185029Spjd char osname[MAXNAMELEN]; 472185029Spjd 473185029Spjd dmu_objset_name(os, osname); 474185029Spjd if (error = dsl_prop_get_integer(osname, "nbmand", &nbmand, 475185029Spjd NULL)) { 476185029Spjd return (error); 477185029Spjd } 478185029Spjd } 479185029Spjd 480185029Spjd /* 481168404Spjd * Register property callbacks. 482168404Spjd * 483168404Spjd * It would probably be fine to just check for i/o error from 484168404Spjd * the first prop_register(), but I guess I like to go 485168404Spjd * overboard... 486168404Spjd */ 487168404Spjd ds = dmu_objset_ds(os); 488168404Spjd error = dsl_prop_register(ds, "atime", atime_changed_cb, zfsvfs); 489168404Spjd error = error ? error : dsl_prop_register(ds, 490168404Spjd "xattr", xattr_changed_cb, zfsvfs); 491168404Spjd error = error ? error : dsl_prop_register(ds, 492168404Spjd "recordsize", blksz_changed_cb, zfsvfs); 493168404Spjd error = error ? error : dsl_prop_register(ds, 494168404Spjd "readonly", readonly_changed_cb, zfsvfs); 495168404Spjd error = error ? error : dsl_prop_register(ds, 496168404Spjd "setuid", setuid_changed_cb, zfsvfs); 497168404Spjd error = error ? error : dsl_prop_register(ds, 498168404Spjd "exec", exec_changed_cb, zfsvfs); 499168404Spjd error = error ? error : dsl_prop_register(ds, 500168404Spjd "snapdir", snapdir_changed_cb, zfsvfs); 501168404Spjd error = error ? error : dsl_prop_register(ds, 502224174Smm "aclmode", acl_mode_changed_cb, zfsvfs); 503224174Smm error = error ? error : dsl_prop_register(ds, 504168404Spjd "aclinherit", acl_inherit_changed_cb, zfsvfs); 505185029Spjd error = error ? error : dsl_prop_register(ds, 506185029Spjd "vscan", vscan_changed_cb, zfsvfs); 507168404Spjd if (error) 508168404Spjd goto unregister; 509168404Spjd 510168404Spjd /* 511168404Spjd * Invoke our callbacks to restore temporary mount options. 512168404Spjd */ 513168404Spjd if (do_readonly) 514168404Spjd readonly_changed_cb(zfsvfs, readonly); 515168404Spjd if (do_setuid) 516168404Spjd setuid_changed_cb(zfsvfs, setuid); 517168404Spjd if (do_exec) 518168404Spjd exec_changed_cb(zfsvfs, exec); 519168404Spjd if (do_xattr) 520168404Spjd xattr_changed_cb(zfsvfs, xattr); 521185029Spjd if (do_atime) 522185029Spjd atime_changed_cb(zfsvfs, atime); 523168404Spjd 524185029Spjd nbmand_changed_cb(zfsvfs, nbmand); 525185029Spjd 526168404Spjd return (0); 527168404Spjd 528168404Spjdunregister: 529168404Spjd /* 530168404Spjd * We may attempt to unregister some callbacks that are not 531168404Spjd * registered, but this is OK; it will simply return ENOMSG, 532168404Spjd * which we will ignore. 533168404Spjd */ 534168404Spjd (void) dsl_prop_unregister(ds, "atime", atime_changed_cb, zfsvfs); 535168404Spjd (void) dsl_prop_unregister(ds, "xattr", xattr_changed_cb, zfsvfs); 536168404Spjd (void) dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, zfsvfs); 537168404Spjd (void) dsl_prop_unregister(ds, "readonly", readonly_changed_cb, zfsvfs); 538168404Spjd (void) dsl_prop_unregister(ds, "setuid", setuid_changed_cb, zfsvfs); 539168404Spjd (void) dsl_prop_unregister(ds, "exec", exec_changed_cb, zfsvfs); 540168404Spjd (void) dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, zfsvfs); 541224174Smm (void) dsl_prop_unregister(ds, "aclmode", acl_mode_changed_cb, zfsvfs); 542168404Spjd (void) dsl_prop_unregister(ds, "aclinherit", acl_inherit_changed_cb, 543168404Spjd zfsvfs); 544185029Spjd (void) dsl_prop_unregister(ds, "vscan", vscan_changed_cb, zfsvfs); 545168404Spjd return (error); 546168404Spjd 547168404Spjd} 548168404Spjd 549219089Spjdstatic int 550219089Spjdzfs_space_delta_cb(dmu_object_type_t bonustype, void *data, 551219089Spjd uint64_t *userp, uint64_t *groupp) 552209962Smm{ 553219089Spjd znode_phys_t *znp = data; 554219089Spjd int error = 0; 555209962Smm 556219089Spjd /* 557219089Spjd * Is it a valid type of object to track? 558219089Spjd */ 559219089Spjd if (bonustype != DMU_OT_ZNODE && bonustype != DMU_OT_SA) 560219089Spjd return (ENOENT); 561209962Smm 562219089Spjd /* 563219089Spjd * If we have a NULL data pointer 564219089Spjd * then assume the id's aren't changing and 565219089Spjd * return EEXIST to the dmu to let it know to 566219089Spjd * use the same ids 567219089Spjd */ 568219089Spjd if (data == NULL) 569219089Spjd return (EEXIST); 570209962Smm 571219089Spjd if (bonustype == DMU_OT_ZNODE) { 572219089Spjd *userp = znp->zp_uid; 573219089Spjd *groupp = znp->zp_gid; 574219089Spjd } else { 575219089Spjd int hdrsize; 576209962Smm 577219089Spjd ASSERT(bonustype == DMU_OT_SA); 578219089Spjd hdrsize = sa_hdrsize(data); 579209962Smm 580219089Spjd if (hdrsize != 0) { 581219089Spjd *userp = *((uint64_t *)((uintptr_t)data + hdrsize + 582219089Spjd SA_UID_OFFSET)); 583219089Spjd *groupp = *((uint64_t *)((uintptr_t)data + hdrsize + 584219089Spjd SA_GID_OFFSET)); 585219089Spjd } else { 586219089Spjd /* 587219089Spjd * This should only happen for newly created 588219089Spjd * files that haven't had the znode data filled 589219089Spjd * in yet. 590219089Spjd */ 591219089Spjd *userp = 0; 592219089Spjd *groupp = 0; 593219089Spjd } 594209962Smm } 595219089Spjd return (error); 596209962Smm} 597209962Smm 598209962Smmstatic void 599209962Smmfuidstr_to_sid(zfsvfs_t *zfsvfs, const char *fuidstr, 600209962Smm char *domainbuf, int buflen, uid_t *ridp) 601209962Smm{ 602209962Smm uint64_t fuid; 603209962Smm const char *domain; 604209962Smm 605209962Smm fuid = strtonum(fuidstr, NULL); 606209962Smm 607209962Smm domain = zfs_fuid_find_by_idx(zfsvfs, FUID_INDEX(fuid)); 608209962Smm if (domain) 609209962Smm (void) strlcpy(domainbuf, domain, buflen); 610209962Smm else 611209962Smm domainbuf[0] = '\0'; 612209962Smm *ridp = FUID_RID(fuid); 613209962Smm} 614209962Smm 615209962Smmstatic uint64_t 616209962Smmzfs_userquota_prop_to_obj(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type) 617209962Smm{ 618209962Smm switch (type) { 619209962Smm case ZFS_PROP_USERUSED: 620209962Smm return (DMU_USERUSED_OBJECT); 621209962Smm case ZFS_PROP_GROUPUSED: 622209962Smm return (DMU_GROUPUSED_OBJECT); 623209962Smm case ZFS_PROP_USERQUOTA: 624209962Smm return (zfsvfs->z_userquota_obj); 625209962Smm case ZFS_PROP_GROUPQUOTA: 626209962Smm return (zfsvfs->z_groupquota_obj); 627209962Smm } 628209962Smm return (0); 629209962Smm} 630209962Smm 631209962Smmint 632209962Smmzfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 633209962Smm uint64_t *cookiep, void *vbuf, uint64_t *bufsizep) 634209962Smm{ 635209962Smm int error; 636209962Smm zap_cursor_t zc; 637209962Smm zap_attribute_t za; 638209962Smm zfs_useracct_t *buf = vbuf; 639209962Smm uint64_t obj; 640209962Smm 641209962Smm if (!dmu_objset_userspace_present(zfsvfs->z_os)) 642209962Smm return (ENOTSUP); 643209962Smm 644209962Smm obj = zfs_userquota_prop_to_obj(zfsvfs, type); 645209962Smm if (obj == 0) { 646209962Smm *bufsizep = 0; 647209962Smm return (0); 648209962Smm } 649209962Smm 650209962Smm for (zap_cursor_init_serialized(&zc, zfsvfs->z_os, obj, *cookiep); 651209962Smm (error = zap_cursor_retrieve(&zc, &za)) == 0; 652209962Smm zap_cursor_advance(&zc)) { 653209962Smm if ((uintptr_t)buf - (uintptr_t)vbuf + sizeof (zfs_useracct_t) > 654209962Smm *bufsizep) 655209962Smm break; 656209962Smm 657209962Smm fuidstr_to_sid(zfsvfs, za.za_name, 658209962Smm buf->zu_domain, sizeof (buf->zu_domain), &buf->zu_rid); 659209962Smm 660209962Smm buf->zu_space = za.za_first_integer; 661209962Smm buf++; 662209962Smm } 663209962Smm if (error == ENOENT) 664209962Smm error = 0; 665209962Smm 666209962Smm ASSERT3U((uintptr_t)buf - (uintptr_t)vbuf, <=, *bufsizep); 667209962Smm *bufsizep = (uintptr_t)buf - (uintptr_t)vbuf; 668209962Smm *cookiep = zap_cursor_serialize(&zc); 669209962Smm zap_cursor_fini(&zc); 670209962Smm return (error); 671209962Smm} 672209962Smm 673209962Smm/* 674209962Smm * buf must be big enough (eg, 32 bytes) 675209962Smm */ 676168404Spjdstatic int 677209962Smmid_to_fuidstr(zfsvfs_t *zfsvfs, const char *domain, uid_t rid, 678209962Smm char *buf, boolean_t addok) 679209962Smm{ 680209962Smm uint64_t fuid; 681209962Smm int domainid = 0; 682209962Smm 683209962Smm if (domain && domain[0]) { 684209962Smm domainid = zfs_fuid_find_by_domain(zfsvfs, domain, NULL, addok); 685209962Smm if (domainid == -1) 686209962Smm return (ENOENT); 687209962Smm } 688209962Smm fuid = FUID_ENCODE(domainid, rid); 689209962Smm (void) sprintf(buf, "%llx", (longlong_t)fuid); 690209962Smm return (0); 691209962Smm} 692209962Smm 693209962Smmint 694209962Smmzfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 695209962Smm const char *domain, uint64_t rid, uint64_t *valp) 696209962Smm{ 697209962Smm char buf[32]; 698209962Smm int err; 699209962Smm uint64_t obj; 700209962Smm 701209962Smm *valp = 0; 702209962Smm 703209962Smm if (!dmu_objset_userspace_present(zfsvfs->z_os)) 704209962Smm return (ENOTSUP); 705209962Smm 706209962Smm obj = zfs_userquota_prop_to_obj(zfsvfs, type); 707209962Smm if (obj == 0) 708209962Smm return (0); 709209962Smm 710209962Smm err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_FALSE); 711209962Smm if (err) 712209962Smm return (err); 713209962Smm 714209962Smm err = zap_lookup(zfsvfs->z_os, obj, buf, 8, 1, valp); 715209962Smm if (err == ENOENT) 716209962Smm err = 0; 717209962Smm return (err); 718209962Smm} 719209962Smm 720209962Smmint 721209962Smmzfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, 722209962Smm const char *domain, uint64_t rid, uint64_t quota) 723209962Smm{ 724209962Smm char buf[32]; 725209962Smm int err; 726209962Smm dmu_tx_t *tx; 727209962Smm uint64_t *objp; 728209962Smm boolean_t fuid_dirtied; 729209962Smm 730209962Smm if (type != ZFS_PROP_USERQUOTA && type != ZFS_PROP_GROUPQUOTA) 731209962Smm return (EINVAL); 732209962Smm 733209962Smm if (zfsvfs->z_version < ZPL_VERSION_USERSPACE) 734209962Smm return (ENOTSUP); 735209962Smm 736209962Smm objp = (type == ZFS_PROP_USERQUOTA) ? &zfsvfs->z_userquota_obj : 737209962Smm &zfsvfs->z_groupquota_obj; 738209962Smm 739209962Smm err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_TRUE); 740209962Smm if (err) 741209962Smm return (err); 742209962Smm fuid_dirtied = zfsvfs->z_fuid_dirty; 743209962Smm 744209962Smm tx = dmu_tx_create(zfsvfs->z_os); 745209962Smm dmu_tx_hold_zap(tx, *objp ? *objp : DMU_NEW_OBJECT, B_TRUE, NULL); 746209962Smm if (*objp == 0) { 747209962Smm dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE, 748209962Smm zfs_userquota_prop_prefixes[type]); 749209962Smm } 750209962Smm if (fuid_dirtied) 751209962Smm zfs_fuid_txhold(zfsvfs, tx); 752209962Smm err = dmu_tx_assign(tx, TXG_WAIT); 753209962Smm if (err) { 754209962Smm dmu_tx_abort(tx); 755209962Smm return (err); 756209962Smm } 757209962Smm 758209962Smm mutex_enter(&zfsvfs->z_lock); 759209962Smm if (*objp == 0) { 760209962Smm *objp = zap_create(zfsvfs->z_os, DMU_OT_USERGROUP_QUOTA, 761209962Smm DMU_OT_NONE, 0, tx); 762209962Smm VERIFY(0 == zap_add(zfsvfs->z_os, MASTER_NODE_OBJ, 763209962Smm zfs_userquota_prop_prefixes[type], 8, 1, objp, tx)); 764209962Smm } 765209962Smm mutex_exit(&zfsvfs->z_lock); 766209962Smm 767209962Smm if (quota == 0) { 768209962Smm err = zap_remove(zfsvfs->z_os, *objp, buf, tx); 769209962Smm if (err == ENOENT) 770209962Smm err = 0; 771209962Smm } else { 772209962Smm err = zap_update(zfsvfs->z_os, *objp, buf, 8, 1, "a, tx); 773209962Smm } 774209962Smm ASSERT(err == 0); 775209962Smm if (fuid_dirtied) 776209962Smm zfs_fuid_sync(zfsvfs, tx); 777209962Smm dmu_tx_commit(tx); 778209962Smm return (err); 779209962Smm} 780209962Smm 781209962Smmboolean_t 782219089Spjdzfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup, uint64_t fuid) 783209962Smm{ 784209962Smm char buf[32]; 785209962Smm uint64_t used, quota, usedobj, quotaobj; 786209962Smm int err; 787209962Smm 788209962Smm usedobj = isgroup ? DMU_GROUPUSED_OBJECT : DMU_USERUSED_OBJECT; 789209962Smm quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj; 790209962Smm 791209962Smm if (quotaobj == 0 || zfsvfs->z_replay) 792209962Smm return (B_FALSE); 793209962Smm 794209962Smm (void) sprintf(buf, "%llx", (longlong_t)fuid); 795209962Smm err = zap_lookup(zfsvfs->z_os, quotaobj, buf, 8, 1, "a); 796209962Smm if (err != 0) 797209962Smm return (B_FALSE); 798209962Smm 799209962Smm err = zap_lookup(zfsvfs->z_os, usedobj, buf, 8, 1, &used); 800209962Smm if (err != 0) 801209962Smm return (B_FALSE); 802209962Smm return (used >= quota); 803209962Smm} 804209962Smm 805219089Spjdboolean_t 806219089Spjdzfs_owner_overquota(zfsvfs_t *zfsvfs, znode_t *zp, boolean_t isgroup) 807219089Spjd{ 808219089Spjd uint64_t fuid; 809219089Spjd uint64_t quotaobj; 810219089Spjd 811219089Spjd quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj; 812219089Spjd 813219089Spjd fuid = isgroup ? zp->z_gid : zp->z_uid; 814219089Spjd 815219089Spjd if (quotaobj == 0 || zfsvfs->z_replay) 816219089Spjd return (B_FALSE); 817219089Spjd 818219089Spjd return (zfs_fuid_overquota(zfsvfs, isgroup, fuid)); 819219089Spjd} 820219089Spjd 821209962Smmint 822219089Spjdzfsvfs_create(const char *osname, zfsvfs_t **zfvp) 823209962Smm{ 824209962Smm objset_t *os; 825209962Smm zfsvfs_t *zfsvfs; 826209962Smm uint64_t zval; 827209962Smm int i, error; 828219089Spjd uint64_t sa_obj; 829209962Smm 830219089Spjd zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); 831219089Spjd 832219089Spjd /* 833219089Spjd * We claim to always be readonly so we can open snapshots; 834219089Spjd * other ZPL code will prevent us from writing to snapshots. 835219089Spjd */ 836219089Spjd error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zfsvfs, &os); 837219089Spjd if (error) { 838219089Spjd kmem_free(zfsvfs, sizeof (zfsvfs_t)); 839209962Smm return (error); 840209962Smm } 841209962Smm 842209962Smm /* 843209962Smm * Initialize the zfs-specific filesystem structure. 844209962Smm * Should probably make this a kmem cache, shuffle fields, 845209962Smm * and just bzero up to z_hold_mtx[]. 846209962Smm */ 847209962Smm zfsvfs->z_vfs = NULL; 848209962Smm zfsvfs->z_parent = zfsvfs; 849209962Smm zfsvfs->z_max_blksz = SPA_MAXBLOCKSIZE; 850209962Smm zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE; 851209962Smm zfsvfs->z_os = os; 852209962Smm 853209962Smm error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version); 854209962Smm if (error) { 855209962Smm goto out; 856219089Spjd } else if (zfsvfs->z_version > 857219089Spjd zfs_zpl_version_map(spa_version(dmu_objset_spa(os)))) { 858219089Spjd (void) printf("Can't mount a version %lld file system " 859219089Spjd "on a version %lld pool\n. Pool must be upgraded to mount " 860219089Spjd "this file system.", (u_longlong_t)zfsvfs->z_version, 861219089Spjd (u_longlong_t)spa_version(dmu_objset_spa(os))); 862209962Smm error = ENOTSUP; 863209962Smm goto out; 864209962Smm } 865209962Smm if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0) 866209962Smm goto out; 867209962Smm zfsvfs->z_norm = (int)zval; 868209962Smm 869209962Smm if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0) 870209962Smm goto out; 871209962Smm zfsvfs->z_utf8 = (zval != 0); 872209962Smm 873209962Smm if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0) 874209962Smm goto out; 875209962Smm zfsvfs->z_case = (uint_t)zval; 876209962Smm 877209962Smm /* 878209962Smm * Fold case on file systems that are always or sometimes case 879209962Smm * insensitive. 880209962Smm */ 881209962Smm if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE || 882209962Smm zfsvfs->z_case == ZFS_CASE_MIXED) 883209962Smm zfsvfs->z_norm |= U8_TEXTPREP_TOUPPER; 884209962Smm 885209962Smm zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); 886219089Spjd zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); 887209962Smm 888219089Spjd if (zfsvfs->z_use_sa) { 889219089Spjd /* should either have both of these objects or none */ 890219089Spjd error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, 891219089Spjd &sa_obj); 892219089Spjd if (error) 893219089Spjd return (error); 894219089Spjd } else { 895219089Spjd /* 896219089Spjd * Pre SA versions file systems should never touch 897219089Spjd * either the attribute registration or layout objects. 898219089Spjd */ 899219089Spjd sa_obj = 0; 900219089Spjd } 901219089Spjd 902219089Spjd error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END, 903219089Spjd &zfsvfs->z_attr_table); 904219089Spjd if (error) 905219089Spjd goto out; 906219089Spjd 907219089Spjd if (zfsvfs->z_version >= ZPL_VERSION_SA) 908219089Spjd sa_register_update_callback(os, zfs_sa_upgrade); 909219089Spjd 910209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, 911209962Smm &zfsvfs->z_root); 912209962Smm if (error) 913209962Smm goto out; 914209962Smm ASSERT(zfsvfs->z_root != 0); 915209962Smm 916209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1, 917209962Smm &zfsvfs->z_unlinkedobj); 918209962Smm if (error) 919209962Smm goto out; 920209962Smm 921209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, 922209962Smm zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA], 923209962Smm 8, 1, &zfsvfs->z_userquota_obj); 924209962Smm if (error && error != ENOENT) 925209962Smm goto out; 926209962Smm 927209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, 928209962Smm zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA], 929209962Smm 8, 1, &zfsvfs->z_groupquota_obj); 930209962Smm if (error && error != ENOENT) 931209962Smm goto out; 932209962Smm 933209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1, 934209962Smm &zfsvfs->z_fuid_obj); 935209962Smm if (error && error != ENOENT) 936209962Smm goto out; 937209962Smm 938209962Smm error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1, 939209962Smm &zfsvfs->z_shares_dir); 940209962Smm if (error && error != ENOENT) 941209962Smm goto out; 942209962Smm 943209962Smm mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); 944209962Smm mutex_init(&zfsvfs->z_lock, NULL, MUTEX_DEFAULT, NULL); 945209962Smm list_create(&zfsvfs->z_all_znodes, sizeof (znode_t), 946209962Smm offsetof(znode_t, z_link_node)); 947209962Smm rrw_init(&zfsvfs->z_teardown_lock); 948209962Smm rw_init(&zfsvfs->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL); 949209962Smm rw_init(&zfsvfs->z_fuid_lock, NULL, RW_DEFAULT, NULL); 950209962Smm for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 951209962Smm mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); 952209962Smm 953219089Spjd *zfvp = zfsvfs; 954209962Smm return (0); 955209962Smm 956209962Smmout: 957219089Spjd dmu_objset_disown(os, zfsvfs); 958219089Spjd *zfvp = NULL; 959209962Smm kmem_free(zfsvfs, sizeof (zfsvfs_t)); 960209962Smm return (error); 961209962Smm} 962209962Smm 963209962Smmstatic int 964185029Spjdzfsvfs_setup(zfsvfs_t *zfsvfs, boolean_t mounting) 965168404Spjd{ 966185029Spjd int error; 967185029Spjd 968185029Spjd error = zfs_register_callbacks(zfsvfs->z_vfs); 969185029Spjd if (error) 970185029Spjd return (error); 971185029Spjd 972185029Spjd /* 973185029Spjd * Set the objset user_ptr to track its zfsvfs. 974185029Spjd */ 975219089Spjd mutex_enter(&zfsvfs->z_os->os_user_ptr_lock); 976185029Spjd dmu_objset_set_user(zfsvfs->z_os, zfsvfs); 977219089Spjd mutex_exit(&zfsvfs->z_os->os_user_ptr_lock); 978185029Spjd 979208689Smm zfsvfs->z_log = zil_open(zfsvfs->z_os, zfs_get_data); 980208689Smm 981185029Spjd /* 982185029Spjd * If we are not mounting (ie: online recv), then we don't 983185029Spjd * have to worry about replaying the log as we blocked all 984185029Spjd * operations out since we closed the ZIL. 985185029Spjd */ 986185029Spjd if (mounting) { 987185029Spjd boolean_t readonly; 988185029Spjd 989185029Spjd /* 990185029Spjd * During replay we remove the read only flag to 991185029Spjd * allow replays to succeed. 992185029Spjd */ 993185029Spjd readonly = zfsvfs->z_vfs->vfs_flag & VFS_RDONLY; 994208689Smm if (readonly != 0) 995208689Smm zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; 996208689Smm else 997208689Smm zfs_unlinked_drain(zfsvfs); 998185029Spjd 999219089Spjd /* 1000219089Spjd * Parse and replay the intent log. 1001219089Spjd * 1002219089Spjd * Because of ziltest, this must be done after 1003219089Spjd * zfs_unlinked_drain(). (Further note: ziltest 1004219089Spjd * doesn't use readonly mounts, where 1005219089Spjd * zfs_unlinked_drain() isn't called.) This is because 1006219089Spjd * ziltest causes spa_sync() to think it's committed, 1007219089Spjd * but actually it is not, so the intent log contains 1008219089Spjd * many txg's worth of changes. 1009219089Spjd * 1010219089Spjd * In particular, if object N is in the unlinked set in 1011219089Spjd * the last txg to actually sync, then it could be 1012219089Spjd * actually freed in a later txg and then reallocated 1013219089Spjd * in a yet later txg. This would write a "create 1014219089Spjd * object N" record to the intent log. Normally, this 1015219089Spjd * would be fine because the spa_sync() would have 1016219089Spjd * written out the fact that object N is free, before 1017219089Spjd * we could write the "create object N" intent log 1018219089Spjd * record. 1019219089Spjd * 1020219089Spjd * But when we are in ziltest mode, we advance the "open 1021219089Spjd * txg" without actually spa_sync()-ing the changes to 1022219089Spjd * disk. So we would see that object N is still 1023219089Spjd * allocated and in the unlinked set, and there is an 1024219089Spjd * intent log record saying to allocate it. 1025219089Spjd */ 1026219089Spjd if (spa_writeable(dmu_objset_spa(zfsvfs->z_os))) { 1027219089Spjd if (zil_replay_disable) { 1028219089Spjd zil_destroy(zfsvfs->z_log, B_FALSE); 1029219089Spjd } else { 1030219089Spjd zfsvfs->z_replay = B_TRUE; 1031219089Spjd zil_replay(zfsvfs->z_os, zfsvfs, 1032219089Spjd zfs_replay_vector); 1033219089Spjd zfsvfs->z_replay = B_FALSE; 1034219089Spjd } 1035208689Smm } 1036185029Spjd zfsvfs->z_vfs->vfs_flag |= readonly; /* restore readonly bit */ 1037185029Spjd } 1038185029Spjd 1039185029Spjd return (0); 1040185029Spjd} 1041185029Spjd 1042210470Smmextern krwlock_t zfsvfs_lock; /* in zfs_znode.c */ 1043210470Smm 1044209962Smmvoid 1045209962Smmzfsvfs_free(zfsvfs_t *zfsvfs) 1046185029Spjd{ 1047209962Smm int i; 1048209962Smm 1049210470Smm /* 1050210470Smm * This is a barrier to prevent the filesystem from going away in 1051210470Smm * zfs_znode_move() until we can safely ensure that the filesystem is 1052210470Smm * not unmounted. We consider the filesystem valid before the barrier 1053210470Smm * and invalid after the barrier. 1054210470Smm */ 1055210470Smm rw_enter(&zfsvfs_lock, RW_READER); 1056210470Smm rw_exit(&zfsvfs_lock); 1057210470Smm 1058209962Smm zfs_fuid_destroy(zfsvfs); 1059209962Smm 1060185029Spjd mutex_destroy(&zfsvfs->z_znodes_lock); 1061209962Smm mutex_destroy(&zfsvfs->z_lock); 1062185029Spjd list_destroy(&zfsvfs->z_all_znodes); 1063185029Spjd rrw_destroy(&zfsvfs->z_teardown_lock); 1064185029Spjd rw_destroy(&zfsvfs->z_teardown_inactive_lock); 1065185029Spjd rw_destroy(&zfsvfs->z_fuid_lock); 1066209962Smm for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) 1067209962Smm mutex_destroy(&zfsvfs->z_hold_mtx[i]); 1068185029Spjd kmem_free(zfsvfs, sizeof (zfsvfs_t)); 1069185029Spjd} 1070185029Spjd 1071209962Smmstatic void 1072209962Smmzfs_set_fuid_feature(zfsvfs_t *zfsvfs) 1073209962Smm{ 1074209962Smm zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); 1075219089Spjd if (zfsvfs->z_vfs) { 1076219089Spjd if (zfsvfs->z_use_fuids) { 1077219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_XVATTR); 1078219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_SYSATTR_VIEWS); 1079219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACEMASKONACCESS); 1080219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACLONCREATE); 1081219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACCESS_FILTER); 1082219089Spjd vfs_set_feature(zfsvfs->z_vfs, VFSFT_REPARSE); 1083219089Spjd } else { 1084219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_XVATTR); 1085219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_SYSATTR_VIEWS); 1086219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACEMASKONACCESS); 1087219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACLONCREATE); 1088219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_ACCESS_FILTER); 1089219089Spjd vfs_clear_feature(zfsvfs->z_vfs, VFSFT_REPARSE); 1090219089Spjd } 1091209962Smm } 1092219089Spjd zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); 1093209962Smm} 1094209962Smm 1095185029Spjdstatic int 1096185029Spjdzfs_domount(vfs_t *vfsp, char *osname) 1097185029Spjd{ 1098209962Smm uint64_t recordsize, fsid_guid; 1099168404Spjd int error = 0; 1100168404Spjd zfsvfs_t *zfsvfs; 1101209962Smm vnode_t *vp; 1102168404Spjd 1103168404Spjd ASSERT(vfsp); 1104168404Spjd ASSERT(osname); 1105168404Spjd 1106219089Spjd error = zfsvfs_create(osname, &zfsvfs); 1107209962Smm if (error) 1108209962Smm return (error); 1109168404Spjd zfsvfs->z_vfs = vfsp; 1110168404Spjd 1111168404Spjd if (error = dsl_prop_get_integer(osname, "recordsize", &recordsize, 1112168404Spjd NULL)) 1113168404Spjd goto out; 1114204101Spjd zfsvfs->z_vfs->vfs_bsize = SPA_MINBLOCKSIZE; 1115204101Spjd zfsvfs->z_vfs->mnt_stat.f_iosize = recordsize; 1116168404Spjd 1117168404Spjd vfsp->vfs_data = zfsvfs; 1118218386Strasz vfsp->mnt_flag |= MNT_LOCAL; 1119168404Spjd vfsp->mnt_kern_flag |= MNTK_MPSAFE; 1120168404Spjd vfsp->mnt_kern_flag |= MNTK_LOOKUP_SHARED; 1121193440Sps vfsp->mnt_kern_flag |= MNTK_SHARED_WRITES; 1122168404Spjd 1123209962Smm /* 1124209962Smm * The fsid is 64 bits, composed of an 8-bit fs type, which 1125209962Smm * separates our fsid from any other filesystem types, and a 1126209962Smm * 56-bit objset unique ID. The objset unique ID is unique to 1127209962Smm * all objsets open on this system, provided by unique_create(). 1128209962Smm * The 8-bit fs type must be put in the low bits of fsid[1] 1129209962Smm * because that's where other Solaris filesystems put it. 1130209962Smm */ 1131209962Smm fsid_guid = dmu_objset_fsid_guid(zfsvfs->z_os); 1132209962Smm ASSERT((fsid_guid & ~((1ULL<<56)-1)) == 0); 1133209962Smm vfsp->vfs_fsid.val[0] = fsid_guid; 1134209962Smm vfsp->vfs_fsid.val[1] = ((fsid_guid>>32) << 8) | 1135209962Smm vfsp->mnt_vfc->vfc_typenum & 0xFF; 1136168404Spjd 1137185029Spjd /* 1138185029Spjd * Set features for file system. 1139185029Spjd */ 1140209962Smm zfs_set_fuid_feature(zfsvfs); 1141185029Spjd if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE) { 1142185029Spjd vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); 1143185029Spjd vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); 1144185029Spjd vfs_set_feature(vfsp, VFSFT_NOCASESENSITIVE); 1145185029Spjd } else if (zfsvfs->z_case == ZFS_CASE_MIXED) { 1146185029Spjd vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); 1147185029Spjd vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); 1148185029Spjd } 1149219089Spjd vfs_set_feature(vfsp, VFSFT_ZEROCOPY_SUPPORTED); 1150185029Spjd 1151168404Spjd if (dmu_objset_is_snapshot(zfsvfs->z_os)) { 1152185029Spjd uint64_t pval; 1153168404Spjd 1154168404Spjd atime_changed_cb(zfsvfs, B_FALSE); 1155168404Spjd readonly_changed_cb(zfsvfs, B_TRUE); 1156185029Spjd if (error = dsl_prop_get_integer(osname, "xattr", &pval, NULL)) 1157168404Spjd goto out; 1158185029Spjd xattr_changed_cb(zfsvfs, pval); 1159168404Spjd zfsvfs->z_issnap = B_TRUE; 1160219089Spjd zfsvfs->z_os->os_sync = ZFS_SYNC_DISABLED; 1161209962Smm 1162219089Spjd mutex_enter(&zfsvfs->z_os->os_user_ptr_lock); 1163209962Smm dmu_objset_set_user(zfsvfs->z_os, zfsvfs); 1164219089Spjd mutex_exit(&zfsvfs->z_os->os_user_ptr_lock); 1165168404Spjd } else { 1166185029Spjd error = zfsvfs_setup(zfsvfs, B_TRUE); 1167168404Spjd } 1168168404Spjd 1169168404Spjd vfs_mountedfrom(vfsp, osname); 1170209962Smm /* Grab extra reference. */ 1171209962Smm VERIFY(VFS_ROOT(vfsp, LK_EXCLUSIVE, &vp) == 0); 1172209962Smm VOP_UNLOCK(vp, 0); 1173168404Spjd 1174168404Spjd if (!zfsvfs->z_issnap) 1175168404Spjd zfsctl_create(zfsvfs); 1176168404Spjdout: 1177168404Spjd if (error) { 1178219089Spjd dmu_objset_disown(zfsvfs->z_os, zfsvfs); 1179209962Smm zfsvfs_free(zfsvfs); 1180168404Spjd } else { 1181168404Spjd atomic_add_32(&zfs_active_fs_count, 1); 1182168404Spjd } 1183168404Spjd 1184168404Spjd return (error); 1185168404Spjd} 1186168404Spjd 1187168404Spjdvoid 1188168404Spjdzfs_unregister_callbacks(zfsvfs_t *zfsvfs) 1189168404Spjd{ 1190168404Spjd objset_t *os = zfsvfs->z_os; 1191168404Spjd struct dsl_dataset *ds; 1192168404Spjd 1193168404Spjd /* 1194168404Spjd * Unregister properties. 1195168404Spjd */ 1196168404Spjd if (!dmu_objset_is_snapshot(os)) { 1197168404Spjd ds = dmu_objset_ds(os); 1198168404Spjd VERIFY(dsl_prop_unregister(ds, "atime", atime_changed_cb, 1199168404Spjd zfsvfs) == 0); 1200168404Spjd 1201168404Spjd VERIFY(dsl_prop_unregister(ds, "xattr", xattr_changed_cb, 1202168404Spjd zfsvfs) == 0); 1203168404Spjd 1204168404Spjd VERIFY(dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, 1205168404Spjd zfsvfs) == 0); 1206168404Spjd 1207168404Spjd VERIFY(dsl_prop_unregister(ds, "readonly", readonly_changed_cb, 1208168404Spjd zfsvfs) == 0); 1209168404Spjd 1210168404Spjd VERIFY(dsl_prop_unregister(ds, "setuid", setuid_changed_cb, 1211168404Spjd zfsvfs) == 0); 1212168404Spjd 1213168404Spjd VERIFY(dsl_prop_unregister(ds, "exec", exec_changed_cb, 1214168404Spjd zfsvfs) == 0); 1215168404Spjd 1216168404Spjd VERIFY(dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, 1217168404Spjd zfsvfs) == 0); 1218168404Spjd 1219224174Smm VERIFY(dsl_prop_unregister(ds, "aclmode", acl_mode_changed_cb, 1220224174Smm zfsvfs) == 0); 1221224174Smm 1222168404Spjd VERIFY(dsl_prop_unregister(ds, "aclinherit", 1223168404Spjd acl_inherit_changed_cb, zfsvfs) == 0); 1224185029Spjd 1225185029Spjd VERIFY(dsl_prop_unregister(ds, "vscan", 1226185029Spjd vscan_changed_cb, zfsvfs) == 0); 1227168404Spjd } 1228168404Spjd} 1229168404Spjd 1230219089Spjd#ifdef SECLABEL 1231219089Spjd/* 1232219089Spjd * Convert a decimal digit string to a uint64_t integer. 1233219089Spjd */ 1234219089Spjdstatic int 1235219089Spjdstr_to_uint64(char *str, uint64_t *objnum) 1236219089Spjd{ 1237219089Spjd uint64_t num = 0; 1238219089Spjd 1239219089Spjd while (*str) { 1240219089Spjd if (*str < '0' || *str > '9') 1241219089Spjd return (EINVAL); 1242219089Spjd 1243219089Spjd num = num*10 + *str++ - '0'; 1244219089Spjd } 1245219089Spjd 1246219089Spjd *objnum = num; 1247219089Spjd return (0); 1248219089Spjd} 1249219089Spjd 1250219089Spjd/* 1251219089Spjd * The boot path passed from the boot loader is in the form of 1252219089Spjd * "rootpool-name/root-filesystem-object-number'. Convert this 1253219089Spjd * string to a dataset name: "rootpool-name/root-filesystem-name". 1254219089Spjd */ 1255219089Spjdstatic int 1256219089Spjdzfs_parse_bootfs(char *bpath, char *outpath) 1257219089Spjd{ 1258219089Spjd char *slashp; 1259219089Spjd uint64_t objnum; 1260219089Spjd int error; 1261219089Spjd 1262219089Spjd if (*bpath == 0 || *bpath == '/') 1263219089Spjd return (EINVAL); 1264219089Spjd 1265219089Spjd (void) strcpy(outpath, bpath); 1266219089Spjd 1267219089Spjd slashp = strchr(bpath, '/'); 1268219089Spjd 1269219089Spjd /* if no '/', just return the pool name */ 1270219089Spjd if (slashp == NULL) { 1271219089Spjd return (0); 1272219089Spjd } 1273219089Spjd 1274219089Spjd /* if not a number, just return the root dataset name */ 1275219089Spjd if (str_to_uint64(slashp+1, &objnum)) { 1276219089Spjd return (0); 1277219089Spjd } 1278219089Spjd 1279219089Spjd *slashp = '\0'; 1280219089Spjd error = dsl_dsobj_to_dsname(bpath, objnum, outpath); 1281219089Spjd *slashp = '/'; 1282219089Spjd 1283219089Spjd return (error); 1284219089Spjd} 1285219089Spjd 1286219089Spjd/* 1287219089Spjd * zfs_check_global_label: 1288219089Spjd * Check that the hex label string is appropriate for the dataset 1289219089Spjd * being mounted into the global_zone proper. 1290219089Spjd * 1291219089Spjd * Return an error if the hex label string is not default or 1292219089Spjd * admin_low/admin_high. For admin_low labels, the corresponding 1293219089Spjd * dataset must be readonly. 1294219089Spjd */ 1295219089Spjdint 1296219089Spjdzfs_check_global_label(const char *dsname, const char *hexsl) 1297219089Spjd{ 1298219089Spjd if (strcasecmp(hexsl, ZFS_MLSLABEL_DEFAULT) == 0) 1299219089Spjd return (0); 1300219089Spjd if (strcasecmp(hexsl, ADMIN_HIGH) == 0) 1301219089Spjd return (0); 1302219089Spjd if (strcasecmp(hexsl, ADMIN_LOW) == 0) { 1303219089Spjd /* must be readonly */ 1304219089Spjd uint64_t rdonly; 1305219089Spjd 1306219089Spjd if (dsl_prop_get_integer(dsname, 1307219089Spjd zfs_prop_to_name(ZFS_PROP_READONLY), &rdonly, NULL)) 1308219089Spjd return (EACCES); 1309219089Spjd return (rdonly ? 0 : EACCES); 1310219089Spjd } 1311219089Spjd return (EACCES); 1312219089Spjd} 1313219089Spjd 1314219089Spjd/* 1315219089Spjd * zfs_mount_label_policy: 1316219089Spjd * Determine whether the mount is allowed according to MAC check. 1317219089Spjd * by comparing (where appropriate) label of the dataset against 1318219089Spjd * the label of the zone being mounted into. If the dataset has 1319219089Spjd * no label, create one. 1320219089Spjd * 1321219089Spjd * Returns: 1322219089Spjd * 0 : access allowed 1323219089Spjd * >0 : error code, such as EACCES 1324219089Spjd */ 1325219089Spjdstatic int 1326219089Spjdzfs_mount_label_policy(vfs_t *vfsp, char *osname) 1327219089Spjd{ 1328219089Spjd int error, retv; 1329219089Spjd zone_t *mntzone = NULL; 1330219089Spjd ts_label_t *mnt_tsl; 1331219089Spjd bslabel_t *mnt_sl; 1332219089Spjd bslabel_t ds_sl; 1333219089Spjd char ds_hexsl[MAXNAMELEN]; 1334219089Spjd 1335219089Spjd retv = EACCES; /* assume the worst */ 1336219089Spjd 1337219089Spjd /* 1338219089Spjd * Start by getting the dataset label if it exists. 1339219089Spjd */ 1340219089Spjd error = dsl_prop_get(osname, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 1341219089Spjd 1, sizeof (ds_hexsl), &ds_hexsl, NULL); 1342219089Spjd if (error) 1343219089Spjd return (EACCES); 1344219089Spjd 1345219089Spjd /* 1346219089Spjd * If labeling is NOT enabled, then disallow the mount of datasets 1347219089Spjd * which have a non-default label already. No other label checks 1348219089Spjd * are needed. 1349219089Spjd */ 1350219089Spjd if (!is_system_labeled()) { 1351219089Spjd if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0) 1352219089Spjd return (0); 1353219089Spjd return (EACCES); 1354219089Spjd } 1355219089Spjd 1356219089Spjd /* 1357219089Spjd * Get the label of the mountpoint. If mounting into the global 1358219089Spjd * zone (i.e. mountpoint is not within an active zone and the 1359219089Spjd * zoned property is off), the label must be default or 1360219089Spjd * admin_low/admin_high only; no other checks are needed. 1361219089Spjd */ 1362219089Spjd mntzone = zone_find_by_any_path(refstr_value(vfsp->vfs_mntpt), B_FALSE); 1363219089Spjd if (mntzone->zone_id == GLOBAL_ZONEID) { 1364219089Spjd uint64_t zoned; 1365219089Spjd 1366219089Spjd zone_rele(mntzone); 1367219089Spjd 1368219089Spjd if (dsl_prop_get_integer(osname, 1369219089Spjd zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) 1370219089Spjd return (EACCES); 1371219089Spjd if (!zoned) 1372219089Spjd return (zfs_check_global_label(osname, ds_hexsl)); 1373219089Spjd else 1374219089Spjd /* 1375219089Spjd * This is the case of a zone dataset being mounted 1376219089Spjd * initially, before the zone has been fully created; 1377219089Spjd * allow this mount into global zone. 1378219089Spjd */ 1379219089Spjd return (0); 1380219089Spjd } 1381219089Spjd 1382219089Spjd mnt_tsl = mntzone->zone_slabel; 1383219089Spjd ASSERT(mnt_tsl != NULL); 1384219089Spjd label_hold(mnt_tsl); 1385219089Spjd mnt_sl = label2bslabel(mnt_tsl); 1386219089Spjd 1387219089Spjd if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0) { 1388219089Spjd /* 1389219089Spjd * The dataset doesn't have a real label, so fabricate one. 1390219089Spjd */ 1391219089Spjd char *str = NULL; 1392219089Spjd 1393219089Spjd if (l_to_str_internal(mnt_sl, &str) == 0 && 1394219089Spjd dsl_prop_set(osname, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 1395219089Spjd ZPROP_SRC_LOCAL, 1, strlen(str) + 1, str) == 0) 1396219089Spjd retv = 0; 1397219089Spjd if (str != NULL) 1398219089Spjd kmem_free(str, strlen(str) + 1); 1399219089Spjd } else if (hexstr_to_label(ds_hexsl, &ds_sl) == 0) { 1400219089Spjd /* 1401219089Spjd * Now compare labels to complete the MAC check. If the 1402219089Spjd * labels are equal then allow access. If the mountpoint 1403219089Spjd * label dominates the dataset label, allow readonly access. 1404219089Spjd * Otherwise, access is denied. 1405219089Spjd */ 1406219089Spjd if (blequal(mnt_sl, &ds_sl)) 1407219089Spjd retv = 0; 1408219089Spjd else if (bldominates(mnt_sl, &ds_sl)) { 1409219089Spjd vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0); 1410219089Spjd retv = 0; 1411219089Spjd } 1412219089Spjd } 1413219089Spjd 1414219089Spjd label_rele(mnt_tsl); 1415219089Spjd zone_rele(mntzone); 1416219089Spjd return (retv); 1417219089Spjd} 1418219089Spjd#endif /* SECLABEL */ 1419219089Spjd 1420219089Spjd#ifdef OPENSOLARIS_MOUNTROOT 1421219089Spjdstatic int 1422219089Spjdzfs_mountroot(vfs_t *vfsp, enum whymountroot why) 1423219089Spjd{ 1424219089Spjd int error = 0; 1425219089Spjd static int zfsrootdone = 0; 1426219089Spjd zfsvfs_t *zfsvfs = NULL; 1427219089Spjd znode_t *zp = NULL; 1428219089Spjd vnode_t *vp = NULL; 1429219089Spjd char *zfs_bootfs; 1430219089Spjd char *zfs_devid; 1431219089Spjd 1432219089Spjd ASSERT(vfsp); 1433219089Spjd 1434219089Spjd /* 1435219089Spjd * The filesystem that we mount as root is defined in the 1436219089Spjd * boot property "zfs-bootfs" with a format of 1437219089Spjd * "poolname/root-dataset-objnum". 1438219089Spjd */ 1439219089Spjd if (why == ROOT_INIT) { 1440219089Spjd if (zfsrootdone++) 1441219089Spjd return (EBUSY); 1442219089Spjd /* 1443219089Spjd * the process of doing a spa_load will require the 1444219089Spjd * clock to be set before we could (for example) do 1445219089Spjd * something better by looking at the timestamp on 1446219089Spjd * an uberblock, so just set it to -1. 1447219089Spjd */ 1448219089Spjd clkset(-1); 1449219089Spjd 1450219089Spjd if ((zfs_bootfs = spa_get_bootprop("zfs-bootfs")) == NULL) { 1451219089Spjd cmn_err(CE_NOTE, "spa_get_bootfs: can not get " 1452219089Spjd "bootfs name"); 1453219089Spjd return (EINVAL); 1454219089Spjd } 1455219089Spjd zfs_devid = spa_get_bootprop("diskdevid"); 1456219089Spjd error = spa_import_rootpool(rootfs.bo_name, zfs_devid); 1457219089Spjd if (zfs_devid) 1458219089Spjd spa_free_bootprop(zfs_devid); 1459219089Spjd if (error) { 1460219089Spjd spa_free_bootprop(zfs_bootfs); 1461219089Spjd cmn_err(CE_NOTE, "spa_import_rootpool: error %d", 1462219089Spjd error); 1463219089Spjd return (error); 1464219089Spjd } 1465219089Spjd if (error = zfs_parse_bootfs(zfs_bootfs, rootfs.bo_name)) { 1466219089Spjd spa_free_bootprop(zfs_bootfs); 1467219089Spjd cmn_err(CE_NOTE, "zfs_parse_bootfs: error %d", 1468219089Spjd error); 1469219089Spjd return (error); 1470219089Spjd } 1471219089Spjd 1472219089Spjd spa_free_bootprop(zfs_bootfs); 1473219089Spjd 1474219089Spjd if (error = vfs_lock(vfsp)) 1475219089Spjd return (error); 1476219089Spjd 1477219089Spjd if (error = zfs_domount(vfsp, rootfs.bo_name)) { 1478219089Spjd cmn_err(CE_NOTE, "zfs_domount: error %d", error); 1479219089Spjd goto out; 1480219089Spjd } 1481219089Spjd 1482219089Spjd zfsvfs = (zfsvfs_t *)vfsp->vfs_data; 1483219089Spjd ASSERT(zfsvfs); 1484219089Spjd if (error = zfs_zget(zfsvfs, zfsvfs->z_root, &zp)) { 1485219089Spjd cmn_err(CE_NOTE, "zfs_zget: error %d", error); 1486219089Spjd goto out; 1487219089Spjd } 1488219089Spjd 1489219089Spjd vp = ZTOV(zp); 1490219089Spjd mutex_enter(&vp->v_lock); 1491219089Spjd vp->v_flag |= VROOT; 1492219089Spjd mutex_exit(&vp->v_lock); 1493219089Spjd rootvp = vp; 1494219089Spjd 1495219089Spjd /* 1496219089Spjd * Leave rootvp held. The root file system is never unmounted. 1497219089Spjd */ 1498219089Spjd 1499219089Spjd vfs_add((struct vnode *)0, vfsp, 1500219089Spjd (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); 1501219089Spjdout: 1502219089Spjd vfs_unlock(vfsp); 1503219089Spjd return (error); 1504219089Spjd } else if (why == ROOT_REMOUNT) { 1505219089Spjd readonly_changed_cb(vfsp->vfs_data, B_FALSE); 1506219089Spjd vfsp->vfs_flag |= VFS_REMOUNT; 1507219089Spjd 1508219089Spjd /* refresh mount options */ 1509219089Spjd zfs_unregister_callbacks(vfsp->vfs_data); 1510219089Spjd return (zfs_register_callbacks(vfsp)); 1511219089Spjd 1512219089Spjd } else if (why == ROOT_UNMOUNT) { 1513219089Spjd zfs_unregister_callbacks((zfsvfs_t *)vfsp->vfs_data); 1514219089Spjd (void) zfs_sync(vfsp, 0, 0); 1515219089Spjd return (0); 1516219089Spjd } 1517219089Spjd 1518219089Spjd /* 1519219089Spjd * if "why" is equal to anything else other than ROOT_INIT, 1520219089Spjd * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it. 1521219089Spjd */ 1522219089Spjd return (ENOTSUP); 1523219089Spjd} 1524219089Spjd#endif /* OPENSOLARIS_MOUNTROOT */ 1525219089Spjd 1526242554Savgstatic int 1527242554Savggetpoolname(const char *osname, char *poolname) 1528242554Savg{ 1529242554Savg char *p; 1530242554Savg 1531242554Savg p = strchr(osname, '/'); 1532242554Savg if (p == NULL) { 1533242554Savg if (strlen(osname) >= MAXNAMELEN) 1534242554Savg return (ENAMETOOLONG); 1535242554Savg (void) strcpy(poolname, osname); 1536242554Savg } else { 1537242554Savg if (p - osname >= MAXNAMELEN) 1538242554Savg return (ENAMETOOLONG); 1539242554Savg (void) strncpy(poolname, osname, p - osname); 1540242554Savg poolname[p - osname] = '\0'; 1541242554Savg } 1542242554Savg return (0); 1543242554Savg} 1544242554Savg 1545168404Spjd/*ARGSUSED*/ 1546168404Spjdstatic int 1547191990Sattiliozfs_mount(vfs_t *vfsp) 1548168404Spjd{ 1549191990Sattilio kthread_t *td = curthread; 1550185029Spjd vnode_t *mvp = vfsp->mnt_vnodecovered; 1551185029Spjd cred_t *cr = td->td_ucred; 1552185029Spjd char *osname; 1553185029Spjd int error = 0; 1554185029Spjd int canwrite; 1555168404Spjd 1556232728Smm if (!prison_allow(td->td_ucred, PR_ALLOW_MOUNT_ZFS)) 1557232728Smm return (EPERM); 1558232728Smm 1559185029Spjd if (vfs_getopt(vfsp->mnt_optnew, "from", (void **)&osname, NULL)) 1560185029Spjd return (EINVAL); 1561185029Spjd 1562168404Spjd /* 1563185029Spjd * If full-owner-access is enabled and delegated administration is 1564185029Spjd * turned on, we must set nosuid. 1565185029Spjd */ 1566185029Spjd if (zfs_super_owner && 1567185029Spjd dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr) != ECANCELED) { 1568185029Spjd secpolicy_fs_mount_clearopts(cr, vfsp); 1569185029Spjd } 1570185029Spjd 1571185029Spjd /* 1572185029Spjd * Check for mount privilege? 1573185029Spjd * 1574185029Spjd * If we don't have privilege then see if 1575185029Spjd * we have local permission to allow it 1576185029Spjd */ 1577185029Spjd error = secpolicy_fs_mount(cr, mvp, vfsp); 1578185029Spjd if (error) { 1579212694Smm if (dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr) != 0) 1580196944Spjd goto out; 1581196944Spjd 1582196944Spjd if (!(vfsp->vfs_flag & MS_REMOUNT)) { 1583185029Spjd vattr_t vattr; 1584185029Spjd 1585185029Spjd /* 1586185029Spjd * Make sure user is the owner of the mount point 1587185029Spjd * or has sufficient privileges. 1588185029Spjd */ 1589185029Spjd 1590185029Spjd vattr.va_mask = AT_UID; 1591185029Spjd 1592196662Spjd vn_lock(mvp, LK_SHARED | LK_RETRY); 1593212694Smm if (VOP_GETATTR(mvp, &vattr, cr)) { 1594196662Spjd VOP_UNLOCK(mvp, 0); 1595185029Spjd goto out; 1596185029Spjd } 1597185029Spjd 1598185029Spjd if (secpolicy_vnode_owner(mvp, cr, vattr.va_uid) != 0 && 1599185029Spjd VOP_ACCESS(mvp, VWRITE, cr, td) != 0) { 1600196662Spjd VOP_UNLOCK(mvp, 0); 1601185029Spjd goto out; 1602185029Spjd } 1603196662Spjd VOP_UNLOCK(mvp, 0); 1604196944Spjd } 1605185029Spjd 1606196944Spjd secpolicy_fs_mount_clearopts(cr, vfsp); 1607185029Spjd } 1608185029Spjd 1609185029Spjd /* 1610185029Spjd * Refuse to mount a filesystem if we are in a local zone and the 1611185029Spjd * dataset is not visible. 1612185029Spjd */ 1613185029Spjd if (!INGLOBALZONE(curthread) && 1614185029Spjd (!zone_dataset_visible(osname, &canwrite) || !canwrite)) { 1615185029Spjd error = EPERM; 1616185029Spjd goto out; 1617185029Spjd } 1618185029Spjd 1619219089Spjd#ifdef SECLABEL 1620219089Spjd error = zfs_mount_label_policy(vfsp, osname); 1621219089Spjd if (error) 1622219089Spjd goto out; 1623219089Spjd#endif 1624219089Spjd 1625218386Strasz vfsp->vfs_flag |= MNT_NFS4ACLS; 1626218386Strasz 1627185029Spjd /* 1628168404Spjd * When doing a remount, we simply refresh our temporary properties 1629168404Spjd * according to those options set in the current VFS options. 1630168404Spjd */ 1631185029Spjd if (vfsp->vfs_flag & MS_REMOUNT) { 1632185029Spjd /* refresh mount options */ 1633185029Spjd zfs_unregister_callbacks(vfsp->vfs_data); 1634185029Spjd error = zfs_register_callbacks(vfsp); 1635185029Spjd goto out; 1636185029Spjd } 1637168404Spjd 1638242554Savg /* Initial root mount: try hard to import the requested root pool. */ 1639242554Savg if ((vfsp->vfs_flag & MNT_ROOTFS) != 0 && 1640242554Savg (vfsp->vfs_flag & MNT_UPDATE) == 0) { 1641242554Savg char pname[MAXNAMELEN]; 1642242554Savg spa_t *spa; 1643242554Savg int prefer_cache; 1644242554Savg 1645242554Savg error = getpoolname(osname, pname); 1646242554Savg if (error) 1647242554Savg goto out; 1648242554Savg 1649242554Savg prefer_cache = 1; 1650242554Savg TUNABLE_INT_FETCH("vfs.zfs.rootpool.prefer_cached_config", 1651242554Savg &prefer_cache); 1652242554Savg mutex_enter(&spa_namespace_lock); 1653242554Savg spa = spa_lookup(pname); 1654242554Savg mutex_exit(&spa_namespace_lock); 1655242554Savg if (!prefer_cache || spa == NULL) { 1656242554Savg error = spa_import_rootpool(pname); 1657242554Savg if (error) 1658242554Savg goto out; 1659242554Savg } 1660242554Savg } 1661168510Spjd DROP_GIANT(); 1662185029Spjd error = zfs_domount(vfsp, osname); 1663168510Spjd PICKUP_GIANT(); 1664209962Smm 1665215260Smm#ifdef sun 1666209962Smm /* 1667209962Smm * Add an extra VFS_HOLD on our parent vfs so that it can't 1668209962Smm * disappear due to a forced unmount. 1669209962Smm */ 1670209962Smm if (error == 0 && ((zfsvfs_t *)vfsp->vfs_data)->z_issnap) 1671209962Smm VFS_HOLD(mvp->v_vfsp); 1672215260Smm#endif /* sun */ 1673209962Smm 1674185029Spjdout: 1675168510Spjd return (error); 1676168404Spjd} 1677168404Spjd 1678168404Spjdstatic int 1679191990Sattiliozfs_statfs(vfs_t *vfsp, struct statfs *statp) 1680169170Spjd{ 1681168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1682168404Spjd uint64_t refdbytes, availbytes, usedobjs, availobjs; 1683168404Spjd 1684168404Spjd statp->f_version = STATFS_VERSION; 1685168404Spjd 1686168404Spjd ZFS_ENTER(zfsvfs); 1687168404Spjd 1688168404Spjd dmu_objset_space(zfsvfs->z_os, 1689168404Spjd &refdbytes, &availbytes, &usedobjs, &availobjs); 1690168404Spjd 1691168404Spjd /* 1692168404Spjd * The underlying storage pool actually uses multiple block sizes. 1693168404Spjd * We report the fragsize as the smallest block size we support, 1694168404Spjd * and we report our blocksize as the filesystem's maximum blocksize. 1695168404Spjd */ 1696204101Spjd statp->f_bsize = SPA_MINBLOCKSIZE; 1697204101Spjd statp->f_iosize = zfsvfs->z_vfs->mnt_stat.f_iosize; 1698168404Spjd 1699168404Spjd /* 1700168404Spjd * The following report "total" blocks of various kinds in the 1701168404Spjd * file system, but reported in terms of f_frsize - the 1702168404Spjd * "fragment" size. 1703168404Spjd */ 1704168404Spjd 1705204101Spjd statp->f_blocks = (refdbytes + availbytes) >> SPA_MINBLOCKSHIFT; 1706168404Spjd statp->f_bfree = availbytes / statp->f_bsize; 1707168404Spjd statp->f_bavail = statp->f_bfree; /* no root reservation */ 1708168404Spjd 1709168404Spjd /* 1710168404Spjd * statvfs() should really be called statufs(), because it assumes 1711168404Spjd * static metadata. ZFS doesn't preallocate files, so the best 1712168404Spjd * we can do is report the max that could possibly fit in f_files, 1713168404Spjd * and that minus the number actually used in f_ffree. 1714168404Spjd * For f_ffree, report the smaller of the number of object available 1715168404Spjd * and the number of blocks (each object will take at least a block). 1716168404Spjd */ 1717168404Spjd statp->f_ffree = MIN(availobjs, statp->f_bfree); 1718168404Spjd statp->f_files = statp->f_ffree + usedobjs; 1719168404Spjd 1720168404Spjd /* 1721168404Spjd * We're a zfs filesystem. 1722168404Spjd */ 1723168404Spjd (void) strlcpy(statp->f_fstypename, "zfs", sizeof(statp->f_fstypename)); 1724168404Spjd 1725168404Spjd strlcpy(statp->f_mntfromname, vfsp->mnt_stat.f_mntfromname, 1726168404Spjd sizeof(statp->f_mntfromname)); 1727168404Spjd strlcpy(statp->f_mntonname, vfsp->mnt_stat.f_mntonname, 1728168404Spjd sizeof(statp->f_mntonname)); 1729168404Spjd 1730168404Spjd statp->f_namemax = ZFS_MAXNAMELEN; 1731168404Spjd 1732168404Spjd ZFS_EXIT(zfsvfs); 1733168404Spjd return (0); 1734168404Spjd} 1735168404Spjd 1736219089Spjdint 1737219089Spjdzfs_vnode_lock(vnode_t *vp, int flags) 1738219089Spjd{ 1739219089Spjd int error; 1740219089Spjd 1741219089Spjd ASSERT(vp != NULL); 1742219089Spjd 1743219089Spjd /* 1744219089Spjd * Check if the file system wasn't forcibly unmounted in the meantime. 1745219089Spjd */ 1746219089Spjd error = vn_lock(vp, flags); 1747219089Spjd if (error == 0 && (vp->v_iflag & VI_DOOMED) != 0) { 1748219089Spjd VOP_UNLOCK(vp, 0); 1749219089Spjd error = ENOENT; 1750219089Spjd } 1751219089Spjd 1752219089Spjd return (error); 1753219089Spjd} 1754219089Spjd 1755168404Spjdstatic int 1756191990Sattiliozfs_root(vfs_t *vfsp, int flags, vnode_t **vpp) 1757168404Spjd{ 1758168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1759168404Spjd znode_t *rootzp; 1760168404Spjd int error; 1761168404Spjd 1762197459Spjd ZFS_ENTER_NOERROR(zfsvfs); 1763168404Spjd 1764168404Spjd error = zfs_zget(zfsvfs, zfsvfs->z_root, &rootzp); 1765219089Spjd if (error == 0) 1766219089Spjd *vpp = ZTOV(rootzp); 1767206667Spjd 1768206667Spjd ZFS_EXIT(zfsvfs); 1769206667Spjd 1770168404Spjd if (error == 0) { 1771219089Spjd error = zfs_vnode_lock(*vpp, flags); 1772219089Spjd if (error == 0) 1773219089Spjd (*vpp)->v_vflag |= VV_ROOT; 1774168404Spjd } 1775219089Spjd if (error != 0) 1776219089Spjd *vpp = NULL; 1777168404Spjd 1778168404Spjd return (error); 1779168404Spjd} 1780168404Spjd 1781185029Spjd/* 1782185029Spjd * Teardown the zfsvfs::z_os. 1783185029Spjd * 1784185029Spjd * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock' 1785185029Spjd * and 'z_teardown_inactive_lock' held. 1786185029Spjd */ 1787185029Spjdstatic int 1788185029Spjdzfsvfs_teardown(zfsvfs_t *zfsvfs, boolean_t unmounting) 1789185029Spjd{ 1790185029Spjd znode_t *zp; 1791185029Spjd 1792185029Spjd rrw_enter(&zfsvfs->z_teardown_lock, RW_WRITER, FTAG); 1793185029Spjd 1794185029Spjd if (!unmounting) { 1795185029Spjd /* 1796185029Spjd * We purge the parent filesystem's vfsp as the parent 1797185029Spjd * filesystem and all of its snapshots have their vnode's 1798185029Spjd * v_vfsp set to the parent's filesystem's vfsp. Note, 1799185029Spjd * 'z_parent' is self referential for non-snapshots. 1800185029Spjd */ 1801185029Spjd (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); 1802197351Spjd#ifdef FREEBSD_NAMECACHE 1803197351Spjd cache_purgevfs(zfsvfs->z_parent->z_vfs); 1804197351Spjd#endif 1805185029Spjd } 1806185029Spjd 1807185029Spjd /* 1808185029Spjd * Close the zil. NB: Can't close the zil while zfs_inactive 1809185029Spjd * threads are blocked as zil_close can call zfs_inactive. 1810185029Spjd */ 1811185029Spjd if (zfsvfs->z_log) { 1812185029Spjd zil_close(zfsvfs->z_log); 1813185029Spjd zfsvfs->z_log = NULL; 1814185029Spjd } 1815185029Spjd 1816185029Spjd rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_WRITER); 1817185029Spjd 1818185029Spjd /* 1819185029Spjd * If we are not unmounting (ie: online recv) and someone already 1820185029Spjd * unmounted this file system while we were doing the switcheroo, 1821185029Spjd * or a reopen of z_os failed then just bail out now. 1822185029Spjd */ 1823185029Spjd if (!unmounting && (zfsvfs->z_unmounted || zfsvfs->z_os == NULL)) { 1824185029Spjd rw_exit(&zfsvfs->z_teardown_inactive_lock); 1825185029Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 1826185029Spjd return (EIO); 1827185029Spjd } 1828185029Spjd 1829185029Spjd /* 1830185029Spjd * At this point there are no vops active, and any new vops will 1831185029Spjd * fail with EIO since we have z_teardown_lock for writer (only 1832185029Spjd * relavent for forced unmount). 1833185029Spjd * 1834185029Spjd * Release all holds on dbufs. 1835185029Spjd */ 1836185029Spjd mutex_enter(&zfsvfs->z_znodes_lock); 1837185029Spjd for (zp = list_head(&zfsvfs->z_all_znodes); zp != NULL; 1838185029Spjd zp = list_next(&zfsvfs->z_all_znodes, zp)) 1839219089Spjd if (zp->z_sa_hdl) { 1840196297Spjd ASSERT(ZTOV(zp)->v_count >= 0); 1841185029Spjd zfs_znode_dmu_fini(zp); 1842185029Spjd } 1843185029Spjd mutex_exit(&zfsvfs->z_znodes_lock); 1844185029Spjd 1845185029Spjd /* 1846185029Spjd * If we are unmounting, set the unmounted flag and let new vops 1847185029Spjd * unblock. zfs_inactive will have the unmounted behavior, and all 1848185029Spjd * other vops will fail with EIO. 1849185029Spjd */ 1850185029Spjd if (unmounting) { 1851185029Spjd zfsvfs->z_unmounted = B_TRUE; 1852185029Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 1853185029Spjd rw_exit(&zfsvfs->z_teardown_inactive_lock); 1854197133Spjd 1855197133Spjd#ifdef __FreeBSD__ 1856197133Spjd /* 1857197133Spjd * Some znodes might not be fully reclaimed, wait for them. 1858197133Spjd */ 1859197133Spjd mutex_enter(&zfsvfs->z_znodes_lock); 1860197133Spjd while (list_head(&zfsvfs->z_all_znodes) != NULL) { 1861197133Spjd msleep(zfsvfs, &zfsvfs->z_znodes_lock, 0, 1862197133Spjd "zteardown", 0); 1863197133Spjd } 1864197133Spjd mutex_exit(&zfsvfs->z_znodes_lock); 1865197133Spjd#endif 1866185029Spjd } 1867185029Spjd 1868185029Spjd /* 1869185029Spjd * z_os will be NULL if there was an error in attempting to reopen 1870185029Spjd * zfsvfs, so just return as the properties had already been 1871185029Spjd * unregistered and cached data had been evicted before. 1872185029Spjd */ 1873185029Spjd if (zfsvfs->z_os == NULL) 1874185029Spjd return (0); 1875185029Spjd 1876185029Spjd /* 1877185029Spjd * Unregister properties. 1878185029Spjd */ 1879185029Spjd zfs_unregister_callbacks(zfsvfs); 1880185029Spjd 1881185029Spjd /* 1882185029Spjd * Evict cached data 1883185029Spjd */ 1884219089Spjd if (dmu_objset_is_dirty_anywhere(zfsvfs->z_os)) 1885219089Spjd if (!(zfsvfs->z_vfs->vfs_flag & VFS_RDONLY)) 1886219089Spjd txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0); 1887219089Spjd (void) dmu_objset_evict_dbufs(zfsvfs->z_os); 1888185029Spjd 1889185029Spjd return (0); 1890185029Spjd} 1891185029Spjd 1892168404Spjd/*ARGSUSED*/ 1893168404Spjdstatic int 1894191990Sattiliozfs_umount(vfs_t *vfsp, int fflag) 1895168404Spjd{ 1896209962Smm kthread_t *td = curthread; 1897168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 1898185029Spjd objset_t *os; 1899209962Smm cred_t *cr = td->td_ucred; 1900168404Spjd int ret; 1901168404Spjd 1902185029Spjd ret = secpolicy_fs_unmount(cr, vfsp); 1903185029Spjd if (ret) { 1904212694Smm if (dsl_deleg_access((char *)refstr_value(vfsp->vfs_resource), 1905212694Smm ZFS_DELEG_PERM_MOUNT, cr)) 1906185029Spjd return (ret); 1907185029Spjd } 1908219089Spjd 1909185029Spjd /* 1910185029Spjd * We purge the parent filesystem's vfsp as the parent filesystem 1911185029Spjd * and all of its snapshots have their vnode's v_vfsp set to the 1912185029Spjd * parent's filesystem's vfsp. Note, 'z_parent' is self 1913185029Spjd * referential for non-snapshots. 1914185029Spjd */ 1915185029Spjd (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); 1916168404Spjd 1917168404Spjd /* 1918168404Spjd * Unmount any snapshots mounted under .zfs before unmounting the 1919168404Spjd * dataset itself. 1920168404Spjd */ 1921169170Spjd if (zfsvfs->z_ctldir != NULL) { 1922168404Spjd if ((ret = zfsctl_umount_snapshots(vfsp, fflag, cr)) != 0) 1923168404Spjd return (ret); 1924209962Smm ret = vflush(vfsp, 0, 0, td); 1925168404Spjd ASSERT(ret == EBUSY); 1926168404Spjd if (!(fflag & MS_FORCE)) { 1927168404Spjd if (zfsvfs->z_ctldir->v_count > 1) 1928168404Spjd return (EBUSY); 1929168404Spjd ASSERT(zfsvfs->z_ctldir->v_count == 1); 1930168404Spjd } 1931168404Spjd zfsctl_destroy(zfsvfs); 1932168404Spjd ASSERT(zfsvfs->z_ctldir == NULL); 1933168404Spjd } 1934168404Spjd 1935197459Spjd if (fflag & MS_FORCE) { 1936197459Spjd /* 1937197459Spjd * Mark file system as unmounted before calling 1938197459Spjd * vflush(FORCECLOSE). This way we ensure no future vnops 1939197459Spjd * will be called and risk operating on DOOMED vnodes. 1940197459Spjd */ 1941197459Spjd rrw_enter(&zfsvfs->z_teardown_lock, RW_WRITER, FTAG); 1942197459Spjd zfsvfs->z_unmounted = B_TRUE; 1943197459Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 1944197459Spjd } 1945197459Spjd 1946168404Spjd /* 1947168404Spjd * Flush all the files. 1948168404Spjd */ 1949209962Smm ret = vflush(vfsp, 1, (fflag & MS_FORCE) ? FORCECLOSE : 0, td); 1950168404Spjd if (ret != 0) { 1951168404Spjd if (!zfsvfs->z_issnap) { 1952168404Spjd zfsctl_create(zfsvfs); 1953168404Spjd ASSERT(zfsvfs->z_ctldir != NULL); 1954168404Spjd } 1955168404Spjd return (ret); 1956168404Spjd } 1957168404Spjd 1958185029Spjd if (!(fflag & MS_FORCE)) { 1959185029Spjd /* 1960185029Spjd * Check the number of active vnodes in the file system. 1961185029Spjd * Our count is maintained in the vfs structure, but the 1962185029Spjd * number is off by 1 to indicate a hold on the vfs 1963185029Spjd * structure itself. 1964185029Spjd * 1965185029Spjd * The '.zfs' directory maintains a reference of its 1966185029Spjd * own, and any active references underneath are 1967185029Spjd * reflected in the vnode count. 1968185029Spjd */ 1969185029Spjd if (zfsvfs->z_ctldir == NULL) { 1970185029Spjd if (vfsp->vfs_count > 1) 1971185029Spjd return (EBUSY); 1972185029Spjd } else { 1973185029Spjd if (vfsp->vfs_count > 2 || 1974185029Spjd zfsvfs->z_ctldir->v_count > 1) 1975185029Spjd return (EBUSY); 1976185029Spjd } 1977185029Spjd } else { 1978168404Spjd MNT_ILOCK(vfsp); 1979168404Spjd vfsp->mnt_kern_flag |= MNTK_UNMOUNTF; 1980168404Spjd MNT_IUNLOCK(vfsp); 1981185029Spjd } 1982168404Spjd 1983185029Spjd VERIFY(zfsvfs_teardown(zfsvfs, B_TRUE) == 0); 1984185029Spjd os = zfsvfs->z_os; 1985185029Spjd 1986185029Spjd /* 1987185029Spjd * z_os will be NULL if there was an error in 1988185029Spjd * attempting to reopen zfsvfs. 1989185029Spjd */ 1990185029Spjd if (os != NULL) { 1991168404Spjd /* 1992185029Spjd * Unset the objset user_ptr. 1993168404Spjd */ 1994219089Spjd mutex_enter(&os->os_user_ptr_lock); 1995185029Spjd dmu_objset_set_user(os, NULL); 1996219089Spjd mutex_exit(&os->os_user_ptr_lock); 1997185029Spjd 1998185029Spjd /* 1999185029Spjd * Finally release the objset 2000185029Spjd */ 2001219089Spjd dmu_objset_disown(os, zfsvfs); 2002168404Spjd } 2003168404Spjd 2004185029Spjd /* 2005185029Spjd * We can now safely destroy the '.zfs' directory node. 2006185029Spjd */ 2007185029Spjd if (zfsvfs->z_ctldir != NULL) 2008185029Spjd zfsctl_destroy(zfsvfs); 2009185029Spjd if (zfsvfs->z_issnap) { 2010185029Spjd vnode_t *svp = vfsp->mnt_vnodecovered; 2011185029Spjd 2012197515Spjd if (svp->v_count >= 2) 2013192211Skmacy VN_RELE(svp); 2014185029Spjd } 2015168404Spjd zfs_freevfs(vfsp); 2016168404Spjd 2017168404Spjd return (0); 2018168404Spjd} 2019168404Spjd 2020168404Spjdstatic int 2021168404Spjdzfs_vget(vfs_t *vfsp, ino_t ino, int flags, vnode_t **vpp) 2022168404Spjd{ 2023168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 2024168404Spjd znode_t *zp; 2025168404Spjd int err; 2026168404Spjd 2027197167Spjd /* 2028215397Savg * zfs_zget() can't operate on virtual entries like .zfs/ or 2029211855Spjd * .zfs/snapshot/ directories, that's why we return EOPNOTSUPP. 2030211855Spjd * This will make NFS to switch to LOOKUP instead of using VGET. 2031197167Spjd */ 2032197167Spjd if (ino == ZFSCTL_INO_ROOT || ino == ZFSCTL_INO_SNAPDIR) 2033197167Spjd return (EOPNOTSUPP); 2034197167Spjd 2035168404Spjd ZFS_ENTER(zfsvfs); 2036168404Spjd err = zfs_zget(zfsvfs, ino, &zp); 2037168404Spjd if (err == 0 && zp->z_unlinked) { 2038168404Spjd VN_RELE(ZTOV(zp)); 2039168404Spjd err = EINVAL; 2040168404Spjd } 2041219089Spjd if (err == 0) 2042219089Spjd *vpp = ZTOV(zp); 2043206667Spjd ZFS_EXIT(zfsvfs); 2044219089Spjd if (err == 0) 2045219089Spjd err = zfs_vnode_lock(*vpp, flags); 2046168404Spjd if (err != 0) 2047168404Spjd *vpp = NULL; 2048171063Sdfr return (err); 2049168404Spjd} 2050168404Spjd 2051168404Spjdstatic int 2052196982Spjdzfs_checkexp(vfs_t *vfsp, struct sockaddr *nam, int *extflagsp, 2053196982Spjd struct ucred **credanonp, int *numsecflavors, int **secflavors) 2054196982Spjd{ 2055196982Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 2056196982Spjd 2057196982Spjd /* 2058196982Spjd * If this is regular file system vfsp is the same as 2059196982Spjd * zfsvfs->z_parent->z_vfs, but if it is snapshot, 2060196982Spjd * zfsvfs->z_parent->z_vfs represents parent file system 2061196982Spjd * which we have to use here, because only this file system 2062196982Spjd * has mnt_export configured. 2063196982Spjd */ 2064196982Spjd return (vfs_stdcheckexp(zfsvfs->z_parent->z_vfs, nam, extflagsp, 2065196982Spjd credanonp, numsecflavors, secflavors)); 2066196982Spjd} 2067196982Spjd 2068197151SpjdCTASSERT(SHORT_FID_LEN <= sizeof(struct fid)); 2069197151SpjdCTASSERT(LONG_FID_LEN <= sizeof(struct fid)); 2070196982Spjd 2071196982Spjdstatic int 2072222167Srmacklemzfs_fhtovp(vfs_t *vfsp, fid_t *fidp, int flags, vnode_t **vpp) 2073168404Spjd{ 2074168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 2075168404Spjd znode_t *zp; 2076168404Spjd uint64_t object = 0; 2077168404Spjd uint64_t fid_gen = 0; 2078168404Spjd uint64_t gen_mask; 2079168404Spjd uint64_t zp_gen; 2080219089Spjd int i, err; 2081168404Spjd 2082168404Spjd *vpp = NULL; 2083168404Spjd 2084168404Spjd ZFS_ENTER(zfsvfs); 2085168404Spjd 2086196979Spjd /* 2087197177Spjd * On FreeBSD we can get snapshot's mount point or its parent file 2088197177Spjd * system mount point depending if snapshot is already mounted or not. 2089196979Spjd */ 2090197177Spjd if (zfsvfs->z_parent == zfsvfs && fidp->fid_len == LONG_FID_LEN) { 2091168404Spjd zfid_long_t *zlfid = (zfid_long_t *)fidp; 2092168404Spjd uint64_t objsetid = 0; 2093168404Spjd uint64_t setgen = 0; 2094168404Spjd 2095168404Spjd for (i = 0; i < sizeof (zlfid->zf_setid); i++) 2096168404Spjd objsetid |= ((uint64_t)zlfid->zf_setid[i]) << (8 * i); 2097168404Spjd 2098168404Spjd for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 2099168404Spjd setgen |= ((uint64_t)zlfid->zf_setgen[i]) << (8 * i); 2100168404Spjd 2101168404Spjd ZFS_EXIT(zfsvfs); 2102168404Spjd 2103168404Spjd err = zfsctl_lookup_objset(vfsp, objsetid, &zfsvfs); 2104168404Spjd if (err) 2105168404Spjd return (EINVAL); 2106168404Spjd ZFS_ENTER(zfsvfs); 2107168404Spjd } 2108168404Spjd 2109168404Spjd if (fidp->fid_len == SHORT_FID_LEN || fidp->fid_len == LONG_FID_LEN) { 2110168404Spjd zfid_short_t *zfid = (zfid_short_t *)fidp; 2111168404Spjd 2112168404Spjd for (i = 0; i < sizeof (zfid->zf_object); i++) 2113168404Spjd object |= ((uint64_t)zfid->zf_object[i]) << (8 * i); 2114168404Spjd 2115168404Spjd for (i = 0; i < sizeof (zfid->zf_gen); i++) 2116168404Spjd fid_gen |= ((uint64_t)zfid->zf_gen[i]) << (8 * i); 2117168404Spjd } else { 2118168404Spjd ZFS_EXIT(zfsvfs); 2119168404Spjd return (EINVAL); 2120168404Spjd } 2121168404Spjd 2122168404Spjd /* A zero fid_gen means we are in the .zfs control directories */ 2123168404Spjd if (fid_gen == 0 && 2124168404Spjd (object == ZFSCTL_INO_ROOT || object == ZFSCTL_INO_SNAPDIR)) { 2125168404Spjd *vpp = zfsvfs->z_ctldir; 2126168404Spjd ASSERT(*vpp != NULL); 2127168404Spjd if (object == ZFSCTL_INO_SNAPDIR) { 2128168404Spjd VERIFY(zfsctl_root_lookup(*vpp, "snapshot", vpp, NULL, 2129185029Spjd 0, NULL, NULL, NULL, NULL, NULL) == 0); 2130168404Spjd } else { 2131168404Spjd VN_HOLD(*vpp); 2132168404Spjd } 2133206667Spjd ZFS_EXIT(zfsvfs); 2134222199Srmacklem err = zfs_vnode_lock(*vpp, flags | LK_RETRY); 2135219089Spjd if (err != 0) 2136219089Spjd *vpp = NULL; 2137219089Spjd return (err); 2138168404Spjd } 2139168404Spjd 2140168404Spjd gen_mask = -1ULL >> (64 - 8 * i); 2141168404Spjd 2142168404Spjd dprintf("getting %llu [%u mask %llx]\n", object, fid_gen, gen_mask); 2143168404Spjd if (err = zfs_zget(zfsvfs, object, &zp)) { 2144168404Spjd ZFS_EXIT(zfsvfs); 2145168404Spjd return (err); 2146168404Spjd } 2147219089Spjd (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), &zp_gen, 2148219089Spjd sizeof (uint64_t)); 2149219089Spjd zp_gen = zp_gen & gen_mask; 2150168404Spjd if (zp_gen == 0) 2151168404Spjd zp_gen = 1; 2152168404Spjd if (zp->z_unlinked || zp_gen != fid_gen) { 2153168404Spjd dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen, fid_gen); 2154168404Spjd VN_RELE(ZTOV(zp)); 2155168404Spjd ZFS_EXIT(zfsvfs); 2156168404Spjd return (EINVAL); 2157168404Spjd } 2158168404Spjd 2159219089Spjd *vpp = ZTOV(zp); 2160206667Spjd ZFS_EXIT(zfsvfs); 2161222199Srmacklem err = zfs_vnode_lock(*vpp, flags | LK_RETRY); 2162219089Spjd if (err == 0) 2163219089Spjd vnode_create_vobject(*vpp, zp->z_size, curthread); 2164219089Spjd else 2165219089Spjd *vpp = NULL; 2166219089Spjd return (err); 2167168404Spjd} 2168168404Spjd 2169185029Spjd/* 2170185029Spjd * Block out VOPs and close zfsvfs_t::z_os 2171185029Spjd * 2172185029Spjd * Note, if successful, then we return with the 'z_teardown_lock' and 2173185029Spjd * 'z_teardown_inactive_lock' write held. 2174185029Spjd */ 2175185029Spjdint 2176219089Spjdzfs_suspend_fs(zfsvfs_t *zfsvfs) 2177168404Spjd{ 2178185029Spjd int error; 2179168404Spjd 2180185029Spjd if ((error = zfsvfs_teardown(zfsvfs, B_FALSE)) != 0) 2181185029Spjd return (error); 2182219089Spjd dmu_objset_disown(zfsvfs->z_os, zfsvfs); 2183168404Spjd 2184185029Spjd return (0); 2185185029Spjd} 2186168404Spjd 2187185029Spjd/* 2188185029Spjd * Reopen zfsvfs_t::z_os and release VOPs. 2189185029Spjd */ 2190185029Spjdint 2191219089Spjdzfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname) 2192185029Spjd{ 2193185029Spjd int err; 2194168404Spjd 2195185029Spjd ASSERT(RRW_WRITE_HELD(&zfsvfs->z_teardown_lock)); 2196185029Spjd ASSERT(RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock)); 2197185029Spjd 2198219089Spjd err = dmu_objset_own(osname, DMU_OST_ZFS, B_FALSE, zfsvfs, 2199219089Spjd &zfsvfs->z_os); 2200185029Spjd if (err) { 2201185029Spjd zfsvfs->z_os = NULL; 2202185029Spjd } else { 2203185029Spjd znode_t *zp; 2204219089Spjd uint64_t sa_obj = 0; 2205185029Spjd 2206219089Spjd /* 2207219089Spjd * Make sure version hasn't changed 2208219089Spjd */ 2209219089Spjd 2210219089Spjd err = zfs_get_zplprop(zfsvfs->z_os, ZFS_PROP_VERSION, 2211219089Spjd &zfsvfs->z_version); 2212219089Spjd 2213219089Spjd if (err) 2214219089Spjd goto bail; 2215219089Spjd 2216219089Spjd err = zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ, 2217219089Spjd ZFS_SA_ATTRS, 8, 1, &sa_obj); 2218219089Spjd 2219219089Spjd if (err && zfsvfs->z_version >= ZPL_VERSION_SA) 2220219089Spjd goto bail; 2221219089Spjd 2222219089Spjd if ((err = sa_setup(zfsvfs->z_os, sa_obj, 2223219089Spjd zfs_attr_table, ZPL_END, &zfsvfs->z_attr_table)) != 0) 2224219089Spjd goto bail; 2225219089Spjd 2226219089Spjd if (zfsvfs->z_version >= ZPL_VERSION_SA) 2227219089Spjd sa_register_update_callback(zfsvfs->z_os, 2228219089Spjd zfs_sa_upgrade); 2229219089Spjd 2230185029Spjd VERIFY(zfsvfs_setup(zfsvfs, B_FALSE) == 0); 2231185029Spjd 2232219089Spjd zfs_set_fuid_feature(zfsvfs); 2233219089Spjd 2234185029Spjd /* 2235185029Spjd * Attempt to re-establish all the active znodes with 2236185029Spjd * their dbufs. If a zfs_rezget() fails, then we'll let 2237185029Spjd * any potential callers discover that via ZFS_ENTER_VERIFY_VP 2238185029Spjd * when they try to use their znode. 2239185029Spjd */ 2240185029Spjd mutex_enter(&zfsvfs->z_znodes_lock); 2241185029Spjd for (zp = list_head(&zfsvfs->z_all_znodes); zp; 2242185029Spjd zp = list_next(&zfsvfs->z_all_znodes, zp)) { 2243185029Spjd (void) zfs_rezget(zp); 2244185029Spjd } 2245185029Spjd mutex_exit(&zfsvfs->z_znodes_lock); 2246168404Spjd } 2247168404Spjd 2248219089Spjdbail: 2249185029Spjd /* release the VOPs */ 2250185029Spjd rw_exit(&zfsvfs->z_teardown_inactive_lock); 2251185029Spjd rrw_exit(&zfsvfs->z_teardown_lock, FTAG); 2252185029Spjd 2253185029Spjd if (err) { 2254185029Spjd /* 2255219089Spjd * Since we couldn't reopen zfsvfs::z_os, or 2256219089Spjd * setup the sa framework force unmount this file system. 2257185029Spjd */ 2258185029Spjd if (vn_vfswlock(zfsvfs->z_vfs->vfs_vnodecovered) == 0) 2259185029Spjd (void) dounmount(zfsvfs->z_vfs, MS_FORCE, curthread); 2260168404Spjd } 2261185029Spjd return (err); 2262168404Spjd} 2263168404Spjd 2264168404Spjdstatic void 2265168404Spjdzfs_freevfs(vfs_t *vfsp) 2266168404Spjd{ 2267168404Spjd zfsvfs_t *zfsvfs = vfsp->vfs_data; 2268168404Spjd 2269215260Smm#ifdef sun 2270209962Smm /* 2271209962Smm * If this is a snapshot, we have an extra VFS_HOLD on our parent 2272219089Spjd * from zfs_mount(). Release it here. If we came through 2273219089Spjd * zfs_mountroot() instead, we didn't grab an extra hold, so 2274219089Spjd * skip the VFS_RELE for rootvfs. 2275209962Smm */ 2276219089Spjd if (zfsvfs->z_issnap && (vfsp != rootvfs)) 2277209962Smm VFS_RELE(zfsvfs->z_parent->z_vfs); 2278215260Smm#endif /* sun */ 2279168404Spjd 2280209962Smm zfsvfs_free(zfsvfs); 2281185029Spjd 2282168404Spjd atomic_add_32(&zfs_active_fs_count, -1); 2283168404Spjd} 2284168404Spjd 2285172135Spjd#ifdef __i386__ 2286172135Spjdstatic int desiredvnodes_backup; 2287172135Spjd#endif 2288172135Spjd 2289172135Spjdstatic void 2290172135Spjdzfs_vnodes_adjust(void) 2291172135Spjd{ 2292172135Spjd#ifdef __i386__ 2293185029Spjd int newdesiredvnodes; 2294172135Spjd 2295172135Spjd desiredvnodes_backup = desiredvnodes; 2296172135Spjd 2297172135Spjd /* 2298172135Spjd * We calculate newdesiredvnodes the same way it is done in 2299172135Spjd * vntblinit(). If it is equal to desiredvnodes, it means that 2300172135Spjd * it wasn't tuned by the administrator and we can tune it down. 2301172135Spjd */ 2302185029Spjd newdesiredvnodes = min(maxproc + cnt.v_page_count / 4, 2 * 2303185029Spjd vm_kmem_size / (5 * (sizeof(struct vm_object) + 2304185029Spjd sizeof(struct vnode)))); 2305185029Spjd if (newdesiredvnodes == desiredvnodes) 2306185029Spjd desiredvnodes = (3 * newdesiredvnodes) / 4; 2307172135Spjd#endif 2308172135Spjd} 2309172135Spjd 2310172135Spjdstatic void 2311172135Spjdzfs_vnodes_adjust_back(void) 2312172135Spjd{ 2313172135Spjd 2314172135Spjd#ifdef __i386__ 2315172135Spjd desiredvnodes = desiredvnodes_backup; 2316172135Spjd#endif 2317172135Spjd} 2318172135Spjd 2319168404Spjdvoid 2320168404Spjdzfs_init(void) 2321168404Spjd{ 2322168404Spjd 2323202129Sdelphij printf("ZFS filesystem version " ZPL_VERSION_STRING "\n"); 2324168404Spjd 2325168404Spjd /* 2326219089Spjd * Initialize .zfs directory structures 2327168404Spjd */ 2328219089Spjd zfsctl_init(); 2329168404Spjd 2330168404Spjd /* 2331219089Spjd * Initialize znode cache, vnode ops, etc... 2332168404Spjd */ 2333219089Spjd zfs_znode_init(); 2334172135Spjd 2335172135Spjd /* 2336219089Spjd * Reduce number of vnodes. Originally number of vnodes is calculated 2337172135Spjd * with UFS inode in mind. We reduce it here, because it's too big for 2338172135Spjd * ZFS/i386. 2339172135Spjd */ 2340172135Spjd zfs_vnodes_adjust(); 2341209962Smm 2342209962Smm dmu_objset_register_type(DMU_OST_ZFS, zfs_space_delta_cb); 2343168404Spjd} 2344168404Spjd 2345168404Spjdvoid 2346168404Spjdzfs_fini(void) 2347168404Spjd{ 2348168404Spjd zfsctl_fini(); 2349168404Spjd zfs_znode_fini(); 2350172135Spjd zfs_vnodes_adjust_back(); 2351168404Spjd} 2352168404Spjd 2353168404Spjdint 2354168404Spjdzfs_busy(void) 2355168404Spjd{ 2356168404Spjd return (zfs_active_fs_count != 0); 2357168404Spjd} 2358185029Spjd 2359185029Spjdint 2360209962Smmzfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers) 2361185029Spjd{ 2362185029Spjd int error; 2363209962Smm objset_t *os = zfsvfs->z_os; 2364185029Spjd dmu_tx_t *tx; 2365185029Spjd 2366185029Spjd if (newvers < ZPL_VERSION_INITIAL || newvers > ZPL_VERSION) 2367185029Spjd return (EINVAL); 2368185029Spjd 2369209962Smm if (newvers < zfsvfs->z_version) 2370209962Smm return (EINVAL); 2371185029Spjd 2372219089Spjd if (zfs_spa_version_map(newvers) > 2373219089Spjd spa_version(dmu_objset_spa(zfsvfs->z_os))) 2374219089Spjd return (ENOTSUP); 2375219089Spjd 2376185029Spjd tx = dmu_tx_create(os); 2377209962Smm dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_FALSE, ZPL_VERSION_STR); 2378219089Spjd if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) { 2379219089Spjd dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE, 2380219089Spjd ZFS_SA_ATTRS); 2381219089Spjd dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 2382219089Spjd } 2383185029Spjd error = dmu_tx_assign(tx, TXG_WAIT); 2384185029Spjd if (error) { 2385185029Spjd dmu_tx_abort(tx); 2386209962Smm return (error); 2387185029Spjd } 2388219089Spjd 2389209962Smm error = zap_update(os, MASTER_NODE_OBJ, ZPL_VERSION_STR, 2390209962Smm 8, 1, &newvers, tx); 2391185029Spjd 2392209962Smm if (error) { 2393209962Smm dmu_tx_commit(tx); 2394209962Smm return (error); 2395209962Smm } 2396209962Smm 2397219089Spjd if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) { 2398219089Spjd uint64_t sa_obj; 2399219089Spjd 2400219089Spjd ASSERT3U(spa_version(dmu_objset_spa(zfsvfs->z_os)), >=, 2401219089Spjd SPA_VERSION_SA); 2402219089Spjd sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE, 2403219089Spjd DMU_OT_NONE, 0, tx); 2404219089Spjd 2405219089Spjd error = zap_add(os, MASTER_NODE_OBJ, 2406219089Spjd ZFS_SA_ATTRS, 8, 1, &sa_obj, tx); 2407219089Spjd ASSERT3U(error, ==, 0); 2408219089Spjd 2409219089Spjd VERIFY(0 == sa_set_sa_object(os, sa_obj)); 2410219089Spjd sa_register_update_callback(os, zfs_sa_upgrade); 2411219089Spjd } 2412219089Spjd 2413219089Spjd spa_history_log_internal(LOG_DS_UPGRADE, 2414219089Spjd dmu_objset_spa(os), tx, "oldver=%llu newver=%llu dataset = %llu", 2415209962Smm zfsvfs->z_version, newvers, dmu_objset_id(os)); 2416209962Smm 2417185029Spjd dmu_tx_commit(tx); 2418185029Spjd 2419209962Smm zfsvfs->z_version = newvers; 2420209962Smm 2421219089Spjd zfs_set_fuid_feature(zfsvfs); 2422209962Smm 2423209962Smm return (0); 2424185029Spjd} 2425219089Spjd 2426185029Spjd/* 2427185029Spjd * Read a property stored within the master node. 2428185029Spjd */ 2429185029Spjdint 2430185029Spjdzfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value) 2431185029Spjd{ 2432185029Spjd const char *pname; 2433185029Spjd int error = ENOENT; 2434185029Spjd 2435185029Spjd /* 2436185029Spjd * Look up the file system's value for the property. For the 2437185029Spjd * version property, we look up a slightly different string. 2438185029Spjd */ 2439185029Spjd if (prop == ZFS_PROP_VERSION) 2440185029Spjd pname = ZPL_VERSION_STR; 2441185029Spjd else 2442185029Spjd pname = zfs_prop_to_name(prop); 2443185029Spjd 2444185029Spjd if (os != NULL) 2445185029Spjd error = zap_lookup(os, MASTER_NODE_OBJ, pname, 8, 1, value); 2446185029Spjd 2447185029Spjd if (error == ENOENT) { 2448185029Spjd /* No value set, use the default value */ 2449185029Spjd switch (prop) { 2450185029Spjd case ZFS_PROP_VERSION: 2451185029Spjd *value = ZPL_VERSION; 2452185029Spjd break; 2453185029Spjd case ZFS_PROP_NORMALIZE: 2454185029Spjd case ZFS_PROP_UTF8ONLY: 2455185029Spjd *value = 0; 2456185029Spjd break; 2457185029Spjd case ZFS_PROP_CASE: 2458185029Spjd *value = ZFS_CASE_SENSITIVE; 2459185029Spjd break; 2460185029Spjd default: 2461185029Spjd return (error); 2462185029Spjd } 2463185029Spjd error = 0; 2464185029Spjd } 2465185029Spjd return (error); 2466185029Spjd} 2467229565Smm 2468229565Smm#ifdef _KERNEL 2469229565Smmvoid 2470229565Smmzfsvfs_update_fromname(const char *oldname, const char *newname) 2471229565Smm{ 2472229565Smm char tmpbuf[MAXPATHLEN]; 2473229565Smm struct mount *mp; 2474229565Smm char *fromname; 2475229565Smm size_t oldlen; 2476229565Smm 2477229565Smm oldlen = strlen(oldname); 2478229565Smm 2479229565Smm mtx_lock(&mountlist_mtx); 2480229565Smm TAILQ_FOREACH(mp, &mountlist, mnt_list) { 2481229565Smm fromname = mp->mnt_stat.f_mntfromname; 2482229565Smm if (strcmp(fromname, oldname) == 0) { 2483229565Smm (void)strlcpy(fromname, newname, 2484229565Smm sizeof(mp->mnt_stat.f_mntfromname)); 2485229565Smm continue; 2486229565Smm } 2487229565Smm if (strncmp(fromname, oldname, oldlen) == 0 && 2488229565Smm (fromname[oldlen] == '/' || fromname[oldlen] == '@')) { 2489229565Smm (void)snprintf(tmpbuf, sizeof(tmpbuf), "%s%s", 2490229565Smm newname, fromname + oldlen); 2491229565Smm (void)strlcpy(fromname, tmpbuf, 2492229565Smm sizeof(mp->mnt_stat.f_mntfromname)); 2493229565Smm continue; 2494229565Smm } 2495229565Smm } 2496229565Smm mtx_unlock(&mountlist_mtx); 2497229565Smm} 2498229565Smm#endif 2499