Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/zfs_vfsops.c @ 6689:47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
6695465 divide by zero in txg_sync_thread() under heavy load
| author | maybee |
|---|---|
| date | Thu, 22 May 2008 11:13:47 -0700 |
| parents | bbfcb773718e |
| children | 361307ae060d |
| rev | line source |
|---|---|
| 789 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
|
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5 * Common Development and Distribution License (the "License"). |
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6 * You may not use this file except in compliance with the License. |
| 789 | 7 * |
| 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 21 /* | |
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22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
| 789 | 23 * Use is subject to license terms. |
| 24 */ | |
| 25 | |
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26 #pragma ident "%Z%%M% %I% %E% SMI" |
| 789 | 27 |
| 28 #include <sys/types.h> | |
| 29 #include <sys/param.h> | |
| 30 #include <sys/systm.h> | |
| 31 #include <sys/sysmacros.h> | |
| 32 #include <sys/kmem.h> | |
| 33 #include <sys/pathname.h> | |
| 34 #include <sys/vnode.h> | |
| 35 #include <sys/vfs.h> | |
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36 #include <sys/vfs_opreg.h> |
| 789 | 37 #include <sys/mntent.h> |
| 38 #include <sys/mount.h> | |
| 39 #include <sys/cmn_err.h> | |
| 40 #include "fs/fs_subr.h" | |
| 41 #include <sys/zfs_znode.h> | |
| 3461 | 42 #include <sys/zfs_dir.h> |
| 789 | 43 #include <sys/zil.h> |
| 44 #include <sys/fs/zfs.h> | |
| 45 #include <sys/dmu.h> | |
| 46 #include <sys/dsl_prop.h> | |
| 3912 | 47 #include <sys/dsl_dataset.h> |
| 4543 | 48 #include <sys/dsl_deleg.h> |
| 789 | 49 #include <sys/spa.h> |
| 50 #include <sys/zap.h> | |
| 51 #include <sys/varargs.h> | |
| 52 #include <sys/policy.h> | |
| 53 #include <sys/atomic.h> | |
| 54 #include <sys/mkdev.h> | |
| 55 #include <sys/modctl.h> | |
| 4543 | 56 #include <sys/refstr.h> |
| 789 | 57 #include <sys/zfs_ioctl.h> |
| 58 #include <sys/zfs_ctldir.h> | |
| 5331 | 59 #include <sys/zfs_fuid.h> |
| 1544 | 60 #include <sys/bootconf.h> |
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61 #include <sys/sunddi.h> |
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62 #include <sys/dnlc.h> |
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63 #include <sys/dmu_objset.h> |
| 6423 | 64 #include <sys/spa_boot.h> |
| 789 | 65 |
| 66 int zfsfstype; | |
| 67 vfsops_t *zfs_vfsops = NULL; | |
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68 static major_t zfs_major; |
| 789 | 69 static minor_t zfs_minor; |
| 70 static kmutex_t zfs_dev_mtx; | |
| 71 | |
| 72 static int zfs_mount(vfs_t *vfsp, vnode_t *mvp, struct mounta *uap, cred_t *cr); | |
| 73 static int zfs_umount(vfs_t *vfsp, int fflag, cred_t *cr); | |
| 1544 | 74 static int zfs_mountroot(vfs_t *vfsp, enum whymountroot); |
| 789 | 75 static int zfs_root(vfs_t *vfsp, vnode_t **vpp); |
| 76 static int zfs_statvfs(vfs_t *vfsp, struct statvfs64 *statp); | |
| 77 static int zfs_vget(vfs_t *vfsp, vnode_t **vpp, fid_t *fidp); | |
| 78 static void zfs_freevfs(vfs_t *vfsp); | |
| 79 | |
| 80 static const fs_operation_def_t zfs_vfsops_template[] = { | |
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81 VFSNAME_MOUNT, { .vfs_mount = zfs_mount }, |
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82 VFSNAME_MOUNTROOT, { .vfs_mountroot = zfs_mountroot }, |
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83 VFSNAME_UNMOUNT, { .vfs_unmount = zfs_umount }, |
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84 VFSNAME_ROOT, { .vfs_root = zfs_root }, |
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85 VFSNAME_STATVFS, { .vfs_statvfs = zfs_statvfs }, |
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86 VFSNAME_SYNC, { .vfs_sync = zfs_sync }, |
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87 VFSNAME_VGET, { .vfs_vget = zfs_vget }, |
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88 VFSNAME_FREEVFS, { .vfs_freevfs = zfs_freevfs }, |
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89 NULL, NULL |
| 789 | 90 }; |
| 91 | |
| 92 static const fs_operation_def_t zfs_vfsops_eio_template[] = { | |
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93 VFSNAME_FREEVFS, { .vfs_freevfs = zfs_freevfs }, |
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94 NULL, NULL |
| 789 | 95 }; |
| 96 | |
| 97 /* | |
| 98 * We need to keep a count of active fs's. | |
| 99 * This is necessary to prevent our module | |
| 100 * from being unloaded after a umount -f | |
| 101 */ | |
| 102 static uint32_t zfs_active_fs_count = 0; | |
| 103 | |
| 104 static char *noatime_cancel[] = { MNTOPT_ATIME, NULL }; | |
| 105 static char *atime_cancel[] = { MNTOPT_NOATIME, NULL }; | |
| 3234 | 106 static char *noxattr_cancel[] = { MNTOPT_XATTR, NULL }; |
| 107 static char *xattr_cancel[] = { MNTOPT_NOXATTR, NULL }; | |
| 789 | 108 |
| 3234 | 109 /* |
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110 * MO_DEFAULT is not used since the default value is determined |
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111 * by the equivalent property. |
| 3234 | 112 */ |
| 789 | 113 static mntopt_t mntopts[] = { |
| 3234 | 114 { MNTOPT_NOXATTR, noxattr_cancel, NULL, 0, NULL }, |
| 115 { MNTOPT_XATTR, xattr_cancel, NULL, 0, NULL }, | |
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116 { MNTOPT_NOATIME, noatime_cancel, NULL, 0, NULL }, |
| 789 | 117 { MNTOPT_ATIME, atime_cancel, NULL, 0, NULL } |
| 118 }; | |
| 119 | |
| 120 static mntopts_t zfs_mntopts = { | |
| 121 sizeof (mntopts) / sizeof (mntopt_t), | |
| 122 mntopts | |
| 123 }; | |
| 124 | |
| 125 /*ARGSUSED*/ | |
| 126 int | |
| 127 zfs_sync(vfs_t *vfsp, short flag, cred_t *cr) | |
| 128 { | |
| 129 /* | |
| 130 * Data integrity is job one. We don't want a compromised kernel | |
| 131 * writing to the storage pool, so we never sync during panic. | |
| 132 */ | |
| 133 if (panicstr) | |
| 134 return (0); | |
| 135 | |
| 136 /* | |
| 137 * SYNC_ATTR is used by fsflush() to force old filesystems like UFS | |
| 138 * to sync metadata, which they would otherwise cache indefinitely. | |
| 139 * Semantically, the only requirement is that the sync be initiated. | |
| 140 * The DMU syncs out txgs frequently, so there's nothing to do. | |
| 141 */ | |
| 142 if (flag & SYNC_ATTR) | |
| 143 return (0); | |
| 144 | |
| 145 if (vfsp != NULL) { | |
| 146 /* | |
| 147 * Sync a specific filesystem. | |
| 148 */ | |
| 149 zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
| 150 | |
| 151 ZFS_ENTER(zfsvfs); | |
| 152 if (zfsvfs->z_log != NULL) | |
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153 zil_commit(zfsvfs->z_log, UINT64_MAX, 0); |
| 789 | 154 else |
| 155 txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0); | |
| 156 ZFS_EXIT(zfsvfs); | |
| 157 } else { | |
| 158 /* | |
| 159 * Sync all ZFS filesystems. This is what happens when you | |
| 160 * run sync(1M). Unlike other filesystems, ZFS honors the | |
| 161 * request by waiting for all pools to commit all dirty data. | |
| 162 */ | |
| 163 spa_sync_allpools(); | |
| 164 } | |
| 165 | |
| 166 return (0); | |
| 167 } | |
| 168 | |
| 1544 | 169 static int |
| 170 zfs_create_unique_device(dev_t *dev) | |
| 171 { | |
| 172 major_t new_major; | |
| 173 | |
| 174 do { | |
| 175 ASSERT3U(zfs_minor, <=, MAXMIN32); | |
| 176 minor_t start = zfs_minor; | |
| 177 do { | |
| 178 mutex_enter(&zfs_dev_mtx); | |
| 179 if (zfs_minor >= MAXMIN32) { | |
| 180 /* | |
| 181 * If we're still using the real major | |
| 182 * keep out of /dev/zfs and /dev/zvol minor | |
| 183 * number space. If we're using a getudev()'ed | |
| 184 * major number, we can use all of its minors. | |
| 185 */ | |
| 186 if (zfs_major == ddi_name_to_major(ZFS_DRIVER)) | |
| 187 zfs_minor = ZFS_MIN_MINOR; | |
| 188 else | |
| 189 zfs_minor = 0; | |
| 190 } else { | |
| 191 zfs_minor++; | |
| 192 } | |
| 193 *dev = makedevice(zfs_major, zfs_minor); | |
| 194 mutex_exit(&zfs_dev_mtx); | |
| 195 } while (vfs_devismounted(*dev) && zfs_minor != start); | |
| 196 if (zfs_minor == start) { | |
| 197 /* | |
| 198 * We are using all ~262,000 minor numbers for the | |
| 199 * current major number. Create a new major number. | |
| 200 */ | |
| 201 if ((new_major = getudev()) == (major_t)-1) { | |
| 202 cmn_err(CE_WARN, | |
| 203 "zfs_mount: Can't get unique major " | |
| 204 "device number."); | |
| 205 return (-1); | |
| 206 } | |
| 207 mutex_enter(&zfs_dev_mtx); | |
| 208 zfs_major = new_major; | |
| 209 zfs_minor = 0; | |
| 210 | |
| 211 mutex_exit(&zfs_dev_mtx); | |
| 212 } else { | |
| 213 break; | |
| 214 } | |
| 215 /* CONSTANTCONDITION */ | |
| 216 } while (1); | |
| 217 | |
| 218 return (0); | |
| 219 } | |
| 220 | |
| 789 | 221 static void |
| 222 atime_changed_cb(void *arg, uint64_t newval) | |
| 223 { | |
| 224 zfsvfs_t *zfsvfs = arg; | |
| 225 | |
| 226 if (newval == TRUE) { | |
| 227 zfsvfs->z_atime = TRUE; | |
| 228 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME); | |
| 229 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_ATIME, NULL, 0); | |
| 230 } else { | |
| 231 zfsvfs->z_atime = FALSE; | |
| 232 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_ATIME); | |
| 233 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME, NULL, 0); | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 static void | |
| 3234 | 238 xattr_changed_cb(void *arg, uint64_t newval) |
| 239 { | |
| 240 zfsvfs_t *zfsvfs = arg; | |
| 241 | |
| 242 if (newval == TRUE) { | |
| 243 /* XXX locking on vfs_flag? */ | |
| 244 zfsvfs->z_vfs->vfs_flag |= VFS_XATTR; | |
| 245 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR); | |
| 246 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_XATTR, NULL, 0); | |
| 247 } else { | |
| 248 /* XXX locking on vfs_flag? */ | |
| 249 zfsvfs->z_vfs->vfs_flag &= ~VFS_XATTR; | |
| 250 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_XATTR); | |
| 251 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR, NULL, 0); | |
| 252 } | |
| 253 } | |
| 254 | |
| 255 static void | |
| 789 | 256 blksz_changed_cb(void *arg, uint64_t newval) |
| 257 { | |
| 258 zfsvfs_t *zfsvfs = arg; | |
| 259 | |
| 260 if (newval < SPA_MINBLOCKSIZE || | |
| 261 newval > SPA_MAXBLOCKSIZE || !ISP2(newval)) | |
| 262 newval = SPA_MAXBLOCKSIZE; | |
| 263 | |
| 264 zfsvfs->z_max_blksz = newval; | |
| 265 zfsvfs->z_vfs->vfs_bsize = newval; | |
| 266 } | |
| 267 | |
| 268 static void | |
| 269 readonly_changed_cb(void *arg, uint64_t newval) | |
| 270 { | |
| 271 zfsvfs_t *zfsvfs = arg; | |
| 272 | |
| 273 if (newval) { | |
| 274 /* XXX locking on vfs_flag? */ | |
| 275 zfsvfs->z_vfs->vfs_flag |= VFS_RDONLY; | |
| 276 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RW); | |
| 277 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RO, NULL, 0); | |
| 278 } else { | |
| 279 /* XXX locking on vfs_flag? */ | |
| 280 zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; | |
| 281 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RO); | |
| 282 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RW, NULL, 0); | |
| 283 } | |
| 284 } | |
| 285 | |
| 286 static void | |
| 287 devices_changed_cb(void *arg, uint64_t newval) | |
| 288 { | |
| 289 zfsvfs_t *zfsvfs = arg; | |
| 290 | |
| 291 if (newval == FALSE) { | |
| 292 zfsvfs->z_vfs->vfs_flag |= VFS_NODEVICES; | |
| 293 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_DEVICES); | |
| 294 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NODEVICES, NULL, 0); | |
| 295 } else { | |
| 296 zfsvfs->z_vfs->vfs_flag &= ~VFS_NODEVICES; | |
| 297 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NODEVICES); | |
| 298 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_DEVICES, NULL, 0); | |
| 299 } | |
| 300 } | |
| 301 | |
| 302 static void | |
| 303 setuid_changed_cb(void *arg, uint64_t newval) | |
| 304 { | |
| 305 zfsvfs_t *zfsvfs = arg; | |
| 306 | |
| 307 if (newval == FALSE) { | |
| 308 zfsvfs->z_vfs->vfs_flag |= VFS_NOSETUID; | |
| 309 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_SETUID); | |
| 310 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID, NULL, 0); | |
| 311 } else { | |
| 312 zfsvfs->z_vfs->vfs_flag &= ~VFS_NOSETUID; | |
| 313 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID); | |
| 314 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_SETUID, NULL, 0); | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 static void | |
| 319 exec_changed_cb(void *arg, uint64_t newval) | |
| 320 { | |
| 321 zfsvfs_t *zfsvfs = arg; | |
| 322 | |
| 323 if (newval == FALSE) { | |
| 324 zfsvfs->z_vfs->vfs_flag |= VFS_NOEXEC; | |
| 325 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_EXEC); | |
| 326 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC, NULL, 0); | |
| 327 } else { | |
| 328 zfsvfs->z_vfs->vfs_flag &= ~VFS_NOEXEC; | |
| 329 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC); | |
| 330 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_EXEC, NULL, 0); | |
| 331 } | |
| 332 } | |
| 333 | |
| 5331 | 334 /* |
| 335 * The nbmand mount option can be changed at mount time. | |
| 336 * We can't allow it to be toggled on live file systems or incorrect | |
| 337 * behavior may be seen from cifs clients | |
| 338 * | |
| 339 * This property isn't registered via dsl_prop_register(), but this callback | |
| 340 * will be called when a file system is first mounted | |
| 341 */ | |
| 342 static void | |
| 343 nbmand_changed_cb(void *arg, uint64_t newval) | |
| 344 { | |
| 345 zfsvfs_t *zfsvfs = arg; | |
| 346 if (newval == FALSE) { | |
| 347 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND); | |
| 348 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND, NULL, 0); | |
| 349 } else { | |
| 350 vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND); | |
| 351 vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND, NULL, 0); | |
| 352 } | |
| 353 } | |
| 354 | |
| 789 | 355 static void |
| 356 snapdir_changed_cb(void *arg, uint64_t newval) | |
| 357 { | |
| 358 zfsvfs_t *zfsvfs = arg; | |
| 359 | |
| 360 zfsvfs->z_show_ctldir = newval; | |
| 361 } | |
| 362 | |
| 363 static void | |
| 5331 | 364 vscan_changed_cb(void *arg, uint64_t newval) |
| 365 { | |
| 366 zfsvfs_t *zfsvfs = arg; | |
| 367 | |
| 368 zfsvfs->z_vscan = newval; | |
| 369 } | |
| 370 | |
| 371 static void | |
| 789 | 372 acl_mode_changed_cb(void *arg, uint64_t newval) |
| 373 { | |
| 374 zfsvfs_t *zfsvfs = arg; | |
| 375 | |
| 376 zfsvfs->z_acl_mode = newval; | |
| 377 } | |
| 378 | |
| 379 static void | |
| 380 acl_inherit_changed_cb(void *arg, uint64_t newval) | |
| 381 { | |
| 382 zfsvfs_t *zfsvfs = arg; | |
| 383 | |
| 384 zfsvfs->z_acl_inherit = newval; | |
| 385 } | |
| 386 | |
| 1544 | 387 static int |
| 388 zfs_register_callbacks(vfs_t *vfsp) | |
| 389 { | |
| 390 struct dsl_dataset *ds = NULL; | |
| 391 objset_t *os = NULL; | |
| 392 zfsvfs_t *zfsvfs = NULL; | |
| 5331 | 393 uint64_t nbmand; |
| 394 int readonly, do_readonly = B_FALSE; | |
| 395 int setuid, do_setuid = B_FALSE; | |
| 396 int exec, do_exec = B_FALSE; | |
| 397 int devices, do_devices = B_FALSE; | |
| 398 int xattr, do_xattr = B_FALSE; | |
| 399 int atime, do_atime = B_FALSE; | |
| 1544 | 400 int error = 0; |
| 401 | |
| 402 ASSERT(vfsp); | |
| 403 zfsvfs = vfsp->vfs_data; | |
| 404 ASSERT(zfsvfs); | |
| 405 os = zfsvfs->z_os; | |
| 406 | |
| 407 /* | |
| 408 * The act of registering our callbacks will destroy any mount | |
| 409 * options we may have. In order to enable temporary overrides | |
| 3234 | 410 * of mount options, we stash away the current values and |
| 1544 | 411 * restore them after we register the callbacks. |
| 412 */ | |
| 413 if (vfs_optionisset(vfsp, MNTOPT_RO, NULL)) { | |
| 414 readonly = B_TRUE; | |
| 415 do_readonly = B_TRUE; | |
| 416 } else if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) { | |
| 417 readonly = B_FALSE; | |
| 418 do_readonly = B_TRUE; | |
| 419 } | |
| 420 if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) { | |
| 421 devices = B_FALSE; | |
| 422 setuid = B_FALSE; | |
| 423 do_devices = B_TRUE; | |
| 424 do_setuid = B_TRUE; | |
| 425 } else { | |
| 426 if (vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL)) { | |
| 427 devices = B_FALSE; | |
| 428 do_devices = B_TRUE; | |
| 3912 | 429 } else if (vfs_optionisset(vfsp, MNTOPT_DEVICES, NULL)) { |
| 1544 | 430 devices = B_TRUE; |
| 431 do_devices = B_TRUE; | |
| 432 } | |
| 433 | |
| 434 if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) { | |
| 435 setuid = B_FALSE; | |
| 436 do_setuid = B_TRUE; | |
| 437 } else if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) { | |
| 438 setuid = B_TRUE; | |
| 439 do_setuid = B_TRUE; | |
| 440 } | |
| 441 } | |
| 442 if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) { | |
| 443 exec = B_FALSE; | |
| 444 do_exec = B_TRUE; | |
| 445 } else if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) { | |
| 446 exec = B_TRUE; | |
| 447 do_exec = B_TRUE; | |
| 448 } | |
| 3234 | 449 if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL)) { |
| 450 xattr = B_FALSE; | |
| 451 do_xattr = B_TRUE; | |
| 452 } else if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL)) { | |
| 453 xattr = B_TRUE; | |
| 454 do_xattr = B_TRUE; | |
| 455 } | |
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456 if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) { |
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457 atime = B_FALSE; |
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458 do_atime = B_TRUE; |
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459 } else if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL)) { |
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460 atime = B_TRUE; |
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461 do_atime = B_TRUE; |
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462 } |
| 1544 | 463 |
| 464 /* | |
| 5331 | 465 * nbmand is a special property. It can only be changed at |
| 466 * mount time. | |
| 467 * | |
| 468 * This is weird, but it is documented to only be changeable | |
| 469 * at mount time. | |
| 470 */ | |
| 471 if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) { | |
| 472 nbmand = B_FALSE; | |
| 473 } else if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) { | |
| 474 nbmand = B_TRUE; | |
| 475 } else { | |
| 476 char osname[MAXNAMELEN]; | |
| 477 | |
| 478 dmu_objset_name(os, osname); | |
| 479 if (error = dsl_prop_get_integer(osname, "nbmand", &nbmand, | |
| 480 NULL)) | |
| 481 return (error); | |
| 482 } | |
| 483 | |
| 484 /* | |
| 1544 | 485 * Register property callbacks. |
| 486 * | |
| 487 * It would probably be fine to just check for i/o error from | |
| 488 * the first prop_register(), but I guess I like to go | |
| 489 * overboard... | |
| 490 */ | |
| 491 ds = dmu_objset_ds(os); | |
| 492 error = dsl_prop_register(ds, "atime", atime_changed_cb, zfsvfs); | |
| 493 error = error ? error : dsl_prop_register(ds, | |
| 3234 | 494 "xattr", xattr_changed_cb, zfsvfs); |
| 495 error = error ? error : dsl_prop_register(ds, | |
| 1544 | 496 "recordsize", blksz_changed_cb, zfsvfs); |
| 497 error = error ? error : dsl_prop_register(ds, | |
| 498 "readonly", readonly_changed_cb, zfsvfs); | |
| 499 error = error ? error : dsl_prop_register(ds, | |
| 500 "devices", devices_changed_cb, zfsvfs); | |
| 501 error = error ? error : dsl_prop_register(ds, | |
| 502 "setuid", setuid_changed_cb, zfsvfs); | |
| 503 error = error ? error : dsl_prop_register(ds, | |
| 504 "exec", exec_changed_cb, zfsvfs); | |
| 505 error = error ? error : dsl_prop_register(ds, | |
| 506 "snapdir", snapdir_changed_cb, zfsvfs); | |
| 507 error = error ? error : dsl_prop_register(ds, | |
| 508 "aclmode", acl_mode_changed_cb, zfsvfs); | |
| 509 error = error ? error : dsl_prop_register(ds, | |
| 510 "aclinherit", acl_inherit_changed_cb, zfsvfs); | |
| 5331 | 511 error = error ? error : dsl_prop_register(ds, |
| 512 "vscan", vscan_changed_cb, zfsvfs); | |
| 1544 | 513 if (error) |
| 514 goto unregister; | |
| 515 | |
| 516 /* | |
| 517 * Invoke our callbacks to restore temporary mount options. | |
| 518 */ | |
| 519 if (do_readonly) | |
| 520 readonly_changed_cb(zfsvfs, readonly); | |
| 521 if (do_setuid) | |
| 522 setuid_changed_cb(zfsvfs, setuid); | |
| 523 if (do_exec) | |
| 524 exec_changed_cb(zfsvfs, exec); | |
| 525 if (do_devices) | |
| 526 devices_changed_cb(zfsvfs, devices); | |
| 3234 | 527 if (do_xattr) |
| 528 xattr_changed_cb(zfsvfs, xattr); | |
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529 if (do_atime) |
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530 atime_changed_cb(zfsvfs, atime); |
| 1544 | 531 |
| 5331 | 532 nbmand_changed_cb(zfsvfs, nbmand); |
| 533 | |
| 1544 | 534 return (0); |
| 535 | |
| 536 unregister: | |
| 537 /* | |
| 538 * We may attempt to unregister some callbacks that are not | |
| 539 * registered, but this is OK; it will simply return ENOMSG, | |
| 540 * which we will ignore. | |
| 541 */ | |
| 542 (void) dsl_prop_unregister(ds, "atime", atime_changed_cb, zfsvfs); | |
| 3234 | 543 (void) dsl_prop_unregister(ds, "xattr", xattr_changed_cb, zfsvfs); |
| 1544 | 544 (void) dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, zfsvfs); |
| 545 (void) dsl_prop_unregister(ds, "readonly", readonly_changed_cb, zfsvfs); | |
| 546 (void) dsl_prop_unregister(ds, "devices", devices_changed_cb, zfsvfs); | |
| 547 (void) dsl_prop_unregister(ds, "setuid", setuid_changed_cb, zfsvfs); | |
| 548 (void) dsl_prop_unregister(ds, "exec", exec_changed_cb, zfsvfs); | |
| 549 (void) dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, zfsvfs); | |
| 550 (void) dsl_prop_unregister(ds, "aclmode", acl_mode_changed_cb, zfsvfs); | |
| 551 (void) dsl_prop_unregister(ds, "aclinherit", acl_inherit_changed_cb, | |
| 552 zfsvfs); | |
| 5331 | 553 (void) dsl_prop_unregister(ds, "vscan", vscan_changed_cb, zfsvfs); |
| 1544 | 554 return (error); |
| 555 | |
| 556 } | |
| 557 | |
| 558 static int | |
|
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559 zfsvfs_setup(zfsvfs_t *zfsvfs, boolean_t mounting) |
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560 { |
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561 uint_t readonly; |
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562 int error; |
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563 |
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564 error = zfs_register_callbacks(zfsvfs->z_vfs); |
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565 if (error) |
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566 return (error); |
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567 |
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568 /* |
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569 * Set the objset user_ptr to track its zfsvfs. |
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570 */ |
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571 mutex_enter(&zfsvfs->z_os->os->os_user_ptr_lock); |
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572 dmu_objset_set_user(zfsvfs->z_os, zfsvfs); |
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573 mutex_exit(&zfsvfs->z_os->os->os_user_ptr_lock); |
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574 |
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575 /* |
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576 * If we are not mounting (ie: online recv), then we don't |
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577 * have to worry about replaying the log as we blocked all |
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578 * operations out since we closed the ZIL. |
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579 */ |
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580 if (mounting) { |
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581 /* |
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582 * During replay we remove the read only flag to |
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583 * allow replays to succeed. |
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584 */ |
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585 readonly = zfsvfs->z_vfs->vfs_flag & VFS_RDONLY; |
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586 if (readonly != 0) |
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587 zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; |
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588 else |
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589 zfs_unlinked_drain(zfsvfs); |
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590 |
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591 /* |
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592 * Parse and replay the intent log. |
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593 * |
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594 * Because of ziltest, this must be done after |
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595 * zfs_unlinked_drain(). (Further note: ziltest doesn't |
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596 * use readonly mounts, where zfs_unlinked_drain() isn't |
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597 * called.) This is because ziltest causes spa_sync() |
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598 * to think it's committed, but actually it is not, so |
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599 * the intent log contains many txg's worth of changes. |
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600 * |
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601 * In particular, if object N is in the unlinked set in |
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602 * the last txg to actually sync, then it could be |
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603 * actually freed in a later txg and then reallocated in |
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604 * a yet later txg. This would write a "create object |
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605 * N" record to the intent log. Normally, this would be |
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606 * fine because the spa_sync() would have written out |
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607 * the fact that object N is free, before we could write |
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608 * the "create object N" intent log record. |
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609 * |
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610 * But when we are in ziltest mode, we advance the "open |
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611 * txg" without actually spa_sync()-ing the changes to |
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612 * disk. So we would see that object N is still |
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613 * allocated and in the unlinked set, and there is an |
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614 * intent log record saying to allocate it. |
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615 */ |
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616 zil_replay(zfsvfs->z_os, zfsvfs, &zfsvfs->z_assign, |
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617 zfs_replay_vector); |
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618 |
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619 zfsvfs->z_vfs->vfs_flag |= readonly; /* restore readonly bit */ |
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620 } |
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621 |
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622 if (!zil_disable) |
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623 zfsvfs->z_log = zil_open(zfsvfs->z_os, zfs_get_data); |
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624 |
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625 return (0); |
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626 } |
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627 |
|
6083
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
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628 static void |
|
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629 zfs_freezfsvfs(zfsvfs_t *zfsvfs) |
|
23e77aa611b1
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630 { |
|
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
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parents:
5648
diff
changeset
|
631 mutex_destroy(&zfsvfs->z_znodes_lock); |
|
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
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parents:
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diff
changeset
|
632 mutex_destroy(&zfsvfs->z_online_recv_lock); |
|
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
ek110237
parents:
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diff
changeset
|
633 list_destroy(&zfsvfs->z_all_znodes); |
|
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
ek110237
parents:
5648
diff
changeset
|
634 rrw_destroy(&zfsvfs->z_teardown_lock); |
|
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
ek110237
parents:
5648
diff
changeset
|
635 rw_destroy(&zfsvfs->z_teardown_inactive_lock); |
|
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
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parents:
5648
diff
changeset
|
636 rw_destroy(&zfsvfs->z_fuid_lock); |
|
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
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parents:
5648
diff
changeset
|
637 kmem_free(zfsvfs, sizeof (zfsvfs_t)); |
|
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
ek110237
parents:
5648
diff
changeset
|
638 } |
|
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
ek110237
parents:
5648
diff
changeset
|
639 |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5147
diff
changeset
|
640 static int |
| 1544 | 641 zfs_domount(vfs_t *vfsp, char *osname, cred_t *cr) |
| 642 { | |
| 643 dev_t mount_dev; | |
| 644 uint64_t recordsize, readonly; | |
| 645 int error = 0; | |
| 646 int mode; | |
| 647 zfsvfs_t *zfsvfs; | |
| 648 znode_t *zp = NULL; | |
| 649 | |
| 650 ASSERT(vfsp); | |
| 651 ASSERT(osname); | |
| 652 | |
| 653 /* | |
| 654 * Initialize the zfs-specific filesystem structure. | |
| 655 * Should probably make this a kmem cache, shuffle fields, | |
| 656 * and just bzero up to z_hold_mtx[]. | |
| 657 */ | |
| 658 zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); | |
| 659 zfsvfs->z_vfs = vfsp; | |
| 660 zfsvfs->z_parent = zfsvfs; | |
| 661 zfsvfs->z_assign = TXG_NOWAIT; | |
| 662 zfsvfs->z_max_blksz = SPA_MAXBLOCKSIZE; | |
| 663 zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE; | |
| 664 | |
| 665 mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); | |
|
6083
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
ek110237
parents:
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diff
changeset
|
666 mutex_init(&zfsvfs->z_online_recv_lock, NULL, MUTEX_DEFAULT, NULL); |
| 1544 | 667 list_create(&zfsvfs->z_all_znodes, sizeof (znode_t), |
| 668 offsetof(znode_t, z_link_node)); | |
|
5326
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diff
changeset
|
669 rrw_init(&zfsvfs->z_teardown_lock); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
670 rw_init(&zfsvfs->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL); |
|
5498
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6622831 normalization properties are not preserved by "zfs send"
timh
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diff
changeset
|
671 rw_init(&zfsvfs->z_fuid_lock, NULL, RW_DEFAULT, NULL); |
| 1544 | 672 |
| 673 /* Initialize the generic filesystem structure. */ | |
| 674 vfsp->vfs_bcount = 0; | |
| 675 vfsp->vfs_data = NULL; | |
| 676 | |
| 677 if (zfs_create_unique_device(&mount_dev) == -1) { | |
| 678 error = ENODEV; | |
| 679 goto out; | |
| 680 } | |
| 681 ASSERT(vfs_devismounted(mount_dev) == 0); | |
| 682 | |
| 683 if (error = dsl_prop_get_integer(osname, "recordsize", &recordsize, | |
| 684 NULL)) | |
| 685 goto out; | |
| 686 | |
| 687 vfsp->vfs_dev = mount_dev; | |
| 688 vfsp->vfs_fstype = zfsfstype; | |
| 689 vfsp->vfs_bsize = recordsize; | |
| 690 vfsp->vfs_flag |= VFS_NOTRUNC; | |
| 691 vfsp->vfs_data = zfsvfs; | |
| 692 | |
| 693 if (error = dsl_prop_get_integer(osname, "readonly", &readonly, NULL)) | |
| 694 goto out; | |
| 695 | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6570
diff
changeset
|
696 mode = DS_MODE_OWNER; |
| 1544 | 697 if (readonly) |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
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diff
changeset
|
698 mode |= DS_MODE_READONLY; |
| 1544 | 699 |
| 700 error = dmu_objset_open(osname, DMU_OST_ZFS, mode, &zfsvfs->z_os); | |
| 701 if (error == EROFS) { | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
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6570
diff
changeset
|
702 mode = DS_MODE_OWNER | DS_MODE_READONLY; |
| 1544 | 703 error = dmu_objset_open(osname, DMU_OST_ZFS, mode, |
| 704 &zfsvfs->z_os); | |
| 705 } | |
| 706 | |
| 707 if (error) | |
| 708 goto out; | |
| 709 | |
| 710 if (error = zfs_init_fs(zfsvfs, &zp, cr)) | |
| 711 goto out; | |
| 712 | |
| 713 /* The call to zfs_init_fs leaves the vnode held, release it here. */ | |
| 714 VN_RELE(ZTOV(zp)); | |
| 715 | |
| 5331 | 716 /* |
| 717 * Set features for file system. | |
| 718 */ | |
| 719 zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); | |
| 720 if (zfsvfs->z_use_fuids) { | |
| 721 vfs_set_feature(vfsp, VFSFT_XVATTR); | |
| 722 vfs_set_feature(vfsp, VFSFT_ACEMASKONACCESS); | |
| 723 vfs_set_feature(vfsp, VFSFT_ACLONCREATE); | |
| 724 } | |
|
5498
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6622831 normalization properties are not preserved by "zfs send"
timh
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diff
changeset
|
725 if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE) { |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
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diff
changeset
|
726 vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
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diff
changeset
|
727 vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
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diff
changeset
|
728 vfs_set_feature(vfsp, VFSFT_NOCASESENSITIVE); |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
729 } else if (zfsvfs->z_case == ZFS_CASE_MIXED) { |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
730 vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
731 vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
732 } |
| 5331 | 733 |
| 1544 | 734 if (dmu_objset_is_snapshot(zfsvfs->z_os)) { |
| 5331 | 735 uint64_t pval; |
| 3234 | 736 |
| 1544 | 737 ASSERT(mode & DS_MODE_READONLY); |
| 738 atime_changed_cb(zfsvfs, B_FALSE); | |
| 739 readonly_changed_cb(zfsvfs, B_TRUE); | |
| 5331 | 740 if (error = dsl_prop_get_integer(osname, "xattr", &pval, NULL)) |
| 3234 | 741 goto out; |
| 5331 | 742 xattr_changed_cb(zfsvfs, pval); |
| 1544 | 743 zfsvfs->z_issnap = B_TRUE; |
| 744 } else { | |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
5147
diff
changeset
|
745 error = zfsvfs_setup(zfsvfs, B_TRUE); |
| 1544 | 746 } |
| 747 | |
| 748 if (!zfsvfs->z_issnap) | |
| 749 zfsctl_create(zfsvfs); | |
| 750 out: | |
| 751 if (error) { | |
| 752 if (zfsvfs->z_os) | |
| 753 dmu_objset_close(zfsvfs->z_os); | |
|
6083
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
ek110237
parents:
5648
diff
changeset
|
754 zfs_freezfsvfs(zfsvfs); |
| 1544 | 755 } else { |
| 756 atomic_add_32(&zfs_active_fs_count, 1); | |
| 757 } | |
| 758 | |
| 759 return (error); | |
| 760 } | |
| 761 | |
| 762 void | |
| 763 zfs_unregister_callbacks(zfsvfs_t *zfsvfs) | |
| 764 { | |
| 765 objset_t *os = zfsvfs->z_os; | |
| 766 struct dsl_dataset *ds; | |
| 767 | |
| 768 /* | |
| 769 * Unregister properties. | |
| 770 */ | |
| 771 if (!dmu_objset_is_snapshot(os)) { | |
| 772 ds = dmu_objset_ds(os); | |
| 773 VERIFY(dsl_prop_unregister(ds, "atime", atime_changed_cb, | |
| 774 zfsvfs) == 0); | |
| 775 | |
| 3234 | 776 VERIFY(dsl_prop_unregister(ds, "xattr", xattr_changed_cb, |
| 777 zfsvfs) == 0); | |
| 778 | |
| 1544 | 779 VERIFY(dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, |
| 780 zfsvfs) == 0); | |
| 781 | |
| 782 VERIFY(dsl_prop_unregister(ds, "readonly", readonly_changed_cb, | |
| 783 zfsvfs) == 0); | |
| 784 | |
| 785 VERIFY(dsl_prop_unregister(ds, "devices", devices_changed_cb, | |
| 786 zfsvfs) == 0); | |
| 787 | |
| 788 VERIFY(dsl_prop_unregister(ds, "setuid", setuid_changed_cb, | |
| 789 zfsvfs) == 0); | |
| 790 | |
| 791 VERIFY(dsl_prop_unregister(ds, "exec", exec_changed_cb, | |
| 792 zfsvfs) == 0); | |
| 793 | |
| 794 VERIFY(dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, | |
| 795 zfsvfs) == 0); | |
| 796 | |
| 797 VERIFY(dsl_prop_unregister(ds, "aclmode", acl_mode_changed_cb, | |
| 798 zfsvfs) == 0); | |
| 799 | |
| 800 VERIFY(dsl_prop_unregister(ds, "aclinherit", | |
| 801 acl_inherit_changed_cb, zfsvfs) == 0); | |
| 5331 | 802 |
| 803 VERIFY(dsl_prop_unregister(ds, "vscan", | |
| 804 vscan_changed_cb, zfsvfs) == 0); | |
| 1544 | 805 } |
| 806 } | |
| 807 | |
| 3912 | 808 /* |
| 809 * Convert a decimal digit string to a uint64_t integer. | |
| 810 */ | |
| 811 static int | |
| 812 str_to_uint64(char *str, uint64_t *objnum) | |
| 813 { | |
| 814 uint64_t num = 0; | |
| 815 | |
| 816 while (*str) { | |
| 817 if (*str < '0' || *str > '9') | |
| 818 return (EINVAL); | |
| 819 | |
| 820 num = num*10 + *str++ - '0'; | |
| 821 } | |
| 822 | |
| 823 *objnum = num; | |
| 824 return (0); | |
| 825 } | |
| 826 | |
| 827 /* | |
| 828 * The boot path passed from the boot loader is in the form of | |
| 829 * "rootpool-name/root-filesystem-object-number'. Convert this | |
| 830 * string to a dataset name: "rootpool-name/root-filesystem-name". | |
| 831 */ | |
| 832 static int | |
| 6423 | 833 zfs_parse_bootfs(char *bpath, char *outpath) |
| 3912 | 834 { |
| 835 char *slashp; | |
| 836 uint64_t objnum; | |
| 837 int error; | |
| 838 | |
| 839 if (*bpath == 0 || *bpath == '/') | |
| 840 return (EINVAL); | |
| 841 | |
| 842 slashp = strchr(bpath, '/'); | |
| 843 | |
| 844 /* if no '/', just return the pool name */ | |
| 845 if (slashp == NULL) { | |
| 846 (void) strcpy(outpath, bpath); | |
| 847 return (0); | |
| 848 } | |
| 849 | |
| 850 if (error = str_to_uint64(slashp+1, &objnum)) | |
| 851 return (error); | |
| 852 | |
| 853 *slashp = '\0'; | |
| 854 error = dsl_dsobj_to_dsname(bpath, objnum, outpath); | |
| 855 *slashp = '/'; | |
| 856 | |
| 857 return (error); | |
| 858 } | |
| 859 | |
| 1544 | 860 static int |
| 861 zfs_mountroot(vfs_t *vfsp, enum whymountroot why) | |
| 862 { | |
| 863 int error = 0; | |
| 864 static int zfsrootdone = 0; | |
| 865 zfsvfs_t *zfsvfs = NULL; | |
| 866 znode_t *zp = NULL; | |
| 867 vnode_t *vp = NULL; | |
| 6423 | 868 char *zfs_bootfs; |
| 1544 | 869 |
| 870 ASSERT(vfsp); | |
| 871 | |
| 872 /* | |
| 3912 | 873 * The filesystem that we mount as root is defined in the |
| 6423 | 874 * boot property "zfs-bootfs" with a format of |
| 875 * "poolname/root-dataset-objnum". | |
| 1544 | 876 */ |
| 877 if (why == ROOT_INIT) { | |
| 878 if (zfsrootdone++) | |
| 879 return (EBUSY); | |
| 6423 | 880 /* |
| 881 * the process of doing a spa_load will require the | |
| 882 * clock to be set before we could (for example) do | |
| 883 * something better by looking at the timestamp on | |
| 884 * an uberblock, so just set it to -1. | |
| 885 */ | |
| 886 clkset(-1); | |
| 1544 | 887 |
| 6423 | 888 if ((zfs_bootfs = spa_get_bootfs()) == NULL) { |
| 889 cmn_err(CE_NOTE, "\nspa_get_bootfs: can not get " | |
| 890 "bootfs name \n"); | |
| 891 return (EINVAL); | |
| 5648 | 892 } |
| 6423 | 893 |
| 894 if (error = spa_import_rootpool(rootfs.bo_name)) { | |
| 895 spa_free_bootfs(zfs_bootfs); | |
| 896 cmn_err(CE_NOTE, "\nspa_import_rootpool: error %d\n", | |
| 897 error); | |
| 898 return (error); | |
| 899 } | |
| 3912 | 900 |
| 6423 | 901 if (error = zfs_parse_bootfs(zfs_bootfs, rootfs.bo_name)) { |
| 902 spa_free_bootfs(zfs_bootfs); | |
| 903 cmn_err(CE_NOTE, "\nzfs_parse_bootfs: error %d\n", | |
| 904 error); | |
| 905 return (error); | |
| 906 } | |
| 3912 | 907 |
| 6423 | 908 spa_free_bootfs(zfs_bootfs); |
| 1544 | 909 |
| 910 if (error = vfs_lock(vfsp)) | |
| 911 return (error); | |
| 912 | |
| 6423 | 913 if (error = zfs_domount(vfsp, rootfs.bo_name, CRED())) { |
| 914 cmn_err(CE_NOTE, "\nzfs_domount: error %d\n", error); | |
| 1544 | 915 goto out; |
| 6423 | 916 } |
| 1544 | 917 |
| 918 zfsvfs = (zfsvfs_t *)vfsp->vfs_data; | |
| 919 ASSERT(zfsvfs); | |
| 6423 | 920 if (error = zfs_zget(zfsvfs, zfsvfs->z_root, &zp)) { |
| 921 cmn_err(CE_NOTE, "\nzfs_zget: error %d\n", error); | |
| 1544 | 922 goto out; |
| 6423 | 923 } |
| 1544 | 924 |
| 925 vp = ZTOV(zp); | |
| 926 mutex_enter(&vp->v_lock); | |
| 927 vp->v_flag |= VROOT; | |
| 928 mutex_exit(&vp->v_lock); | |
| 929 rootvp = vp; | |
| 930 | |
| 931 /* | |
|
6570
bbfcb773718e
6698415 on zfs root, ace_walk oversteps its bounds, causing panic when kmem_flags is set to 0x4f
marks
parents:
6423
diff
changeset
|
932 * Leave rootvp held. The root file system is never unmounted. |
| 1544 | 933 */ |
| 934 | |
| 935 vfs_add((struct vnode *)0, vfsp, | |
| 936 (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); | |
| 937 out: | |
| 938 vfs_unlock(vfsp); | |
| 6423 | 939 return (error); |
| 1544 | 940 } else if (why == ROOT_REMOUNT) { |
| 941 readonly_changed_cb(vfsp->vfs_data, B_FALSE); | |
| 942 vfsp->vfs_flag |= VFS_REMOUNT; | |
|
4596
3aa6e3b5dfca
6561658 xattrs aren't enabled on zfs root filesystem, weirdness with mount output
lling
parents:
4577
diff
changeset
|
943 |
|
3aa6e3b5dfca
6561658 xattrs aren't enabled on zfs root filesystem, weirdness with mount output
lling
parents:
4577
diff
changeset
|
944 /* refresh mount options */ |
|
3aa6e3b5dfca
6561658 xattrs aren't enabled on zfs root filesystem, weirdness with mount output
lling
parents:
4577
diff
changeset
|
945 zfs_unregister_callbacks(vfsp->vfs_data); |
|
3aa6e3b5dfca
6561658 xattrs aren't enabled on zfs root filesystem, weirdness with mount output
lling
parents:
4577
diff
changeset
|
946 return (zfs_register_callbacks(vfsp)); |
|
3aa6e3b5dfca
6561658 xattrs aren't enabled on zfs root filesystem, weirdness with mount output
lling
parents:
4577
diff
changeset
|
947 |
| 1544 | 948 } else if (why == ROOT_UNMOUNT) { |
| 949 zfs_unregister_callbacks((zfsvfs_t *)vfsp->vfs_data); | |
| 950 (void) zfs_sync(vfsp, 0, 0); | |
| 951 return (0); | |
| 952 } | |
| 953 | |
| 954 /* | |
| 955 * if "why" is equal to anything else other than ROOT_INIT, | |
| 956 * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it. | |
| 957 */ | |
| 958 return (ENOTSUP); | |
| 959 } | |
| 960 | |
| 789 | 961 /*ARGSUSED*/ |
| 962 static int | |
| 963 zfs_mount(vfs_t *vfsp, vnode_t *mvp, struct mounta *uap, cred_t *cr) | |
| 964 { | |
| 965 char *osname; | |
| 966 pathname_t spn; | |
| 967 int error = 0; | |
| 968 uio_seg_t fromspace = (uap->flags & MS_SYSSPACE) ? | |
| 3912 | 969 UIO_SYSSPACE : UIO_USERSPACE; |
| 789 | 970 int canwrite; |
| 971 | |
| 972 if (mvp->v_type != VDIR) | |
| 973 return (ENOTDIR); | |
| 974 | |
| 975 mutex_enter(&mvp->v_lock); | |
| 976 if ((uap->flags & MS_REMOUNT) == 0 && | |
| 977 (uap->flags & MS_OVERLAY) == 0 && | |
| 978 (mvp->v_count != 1 || (mvp->v_flag & VROOT))) { | |
| 979 mutex_exit(&mvp->v_lock); | |
| 980 return (EBUSY); | |
| 981 } | |
| 982 mutex_exit(&mvp->v_lock); | |
| 983 | |
| 984 /* | |
| 985 * ZFS does not support passing unparsed data in via MS_DATA. | |
| 986 * Users should use the MS_OPTIONSTR interface; this means | |
| 987 * that all option parsing is already done and the options struct | |
| 988 * can be interrogated. | |
| 989 */ | |
| 990 if ((uap->flags & MS_DATA) && uap->datalen > 0) | |
| 991 return (EINVAL); | |
| 992 | |
| 993 /* | |
| 994 * Get the objset name (the "special" mount argument). | |
| 995 */ | |
| 996 if (error = pn_get(uap->spec, fromspace, &spn)) | |
| 997 return (error); | |
| 998 | |
| 999 osname = spn.pn_path; | |
| 1000 | |
| 4543 | 1001 /* |
| 1002 * Check for mount privilege? | |
| 1003 * | |
| 1004 * If we don't have privilege then see if | |
| 1005 * we have local permission to allow it | |
| 1006 */ | |
| 1007 error = secpolicy_fs_mount(cr, mvp, vfsp); | |
| 1008 if (error) { | |
| 1009 error = dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr); | |
| 1010 if (error == 0) { | |
| 1011 vattr_t vattr; | |
| 1012 | |
| 1013 /* | |
| 1014 * Make sure user is the owner of the mount point | |
| 1015 * or has sufficient privileges. | |
| 1016 */ | |
| 1017 | |
| 1018 vattr.va_mask = AT_UID; | |
| 1019 | |
| 5331 | 1020 if (error = VOP_GETATTR(mvp, &vattr, 0, cr, NULL)) { |
| 4543 | 1021 goto out; |
| 1022 } | |
| 1023 | |
|
5489
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|
1024 if (secpolicy_vnode_owner(cr, vattr.va_uid) != 0 && |
|
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|
1025 VOP_ACCESS(mvp, VWRITE, 0, cr, NULL) != 0) { |
|
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|
1026 error = EPERM; |
| 4543 | 1027 goto out; |
| 1028 } | |
| 1029 | |
| 1030 secpolicy_fs_mount_clearopts(cr, vfsp); | |
| 1031 } else { | |
| 1032 goto out; | |
| 1033 } | |
| 1034 } | |
| 789 | 1035 |
| 1036 /* | |
| 1037 * Refuse to mount a filesystem if we are in a local zone and the | |
| 1038 * dataset is not visible. | |
| 1039 */ | |
| 1040 if (!INGLOBALZONE(curproc) && | |
| 1041 (!zone_dataset_visible(osname, &canwrite) || !canwrite)) { | |
| 1042 error = EPERM; | |
| 1043 goto out; | |
| 1044 } | |
| 1045 | |
|
4596
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|
1046 /* |
|
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6561658 xattrs aren't enabled on zfs root filesystem, weirdness with mount output
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|
1047 * When doing a remount, we simply refresh our temporary properties |
|
3aa6e3b5dfca
6561658 xattrs aren't enabled on zfs root filesystem, weirdness with mount output
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|
1048 * according to those options set in the current VFS options. |
|
3aa6e3b5dfca
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|
1049 */ |
|
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|
1050 if (uap->flags & MS_REMOUNT) { |
|
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6561658 xattrs aren't enabled on zfs root filesystem, weirdness with mount output
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|
1051 /* refresh mount options */ |
|
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6561658 xattrs aren't enabled on zfs root filesystem, weirdness with mount output
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|
1052 zfs_unregister_callbacks(vfsp->vfs_data); |
|
3aa6e3b5dfca
6561658 xattrs aren't enabled on zfs root filesystem, weirdness with mount output
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|
1053 error = zfs_register_callbacks(vfsp); |
|
3aa6e3b5dfca
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|
1054 goto out; |
|
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diff
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|
1055 } |
|
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|
1056 |
| 1544 | 1057 error = zfs_domount(vfsp, osname, cr); |
| 789 | 1058 |
| 1059 out: | |
| 1060 pn_free(&spn); | |
| 1061 return (error); | |
| 1062 } | |
| 1063 | |
| 1064 static int | |
| 1065 zfs_statvfs(vfs_t *vfsp, struct statvfs64 *statp) | |
| 1066 { | |
| 1067 zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
| 1068 dev32_t d32; | |
| 2885 | 1069 uint64_t refdbytes, availbytes, usedobjs, availobjs; |
| 789 | 1070 |
| 1071 ZFS_ENTER(zfsvfs); | |
| 1072 | |
| 2885 | 1073 dmu_objset_space(zfsvfs->z_os, |
| 1074 &refdbytes, &availbytes, &usedobjs, &availobjs); | |
| 789 | 1075 |
| 1076 /* | |
| 1077 * The underlying storage pool actually uses multiple block sizes. | |
| 1078 * We report the fragsize as the smallest block size we support, | |
| 1079 * and we report our blocksize as the filesystem's maximum blocksize. | |
| 1080 */ | |
| 1081 statp->f_frsize = 1UL << SPA_MINBLOCKSHIFT; | |
| 1082 statp->f_bsize = zfsvfs->z_max_blksz; | |
| 1083 | |
| 1084 /* | |
| 1085 * The following report "total" blocks of various kinds in the | |
| 1086 * file system, but reported in terms of f_frsize - the | |
| 1087 * "fragment" size. | |
| 1088 */ | |
| 1089 | |
| 2885 | 1090 statp->f_blocks = (refdbytes + availbytes) >> SPA_MINBLOCKSHIFT; |
| 1091 statp->f_bfree = availbytes >> SPA_MINBLOCKSHIFT; | |
| 789 | 1092 statp->f_bavail = statp->f_bfree; /* no root reservation */ |
| 1093 | |
| 1094 /* | |
| 1095 * statvfs() should really be called statufs(), because it assumes | |
| 1096 * static metadata. ZFS doesn't preallocate files, so the best | |
| 1097 * we can do is report the max that could possibly fit in f_files, | |
| 1098 * and that minus the number actually used in f_ffree. | |
| 1099 * For f_ffree, report the smaller of the number of object available | |
| 1100 * and the number of blocks (each object will take at least a block). | |
| 1101 */ | |
| 2885 | 1102 statp->f_ffree = MIN(availobjs, statp->f_bfree); |
| 789 | 1103 statp->f_favail = statp->f_ffree; /* no "root reservation" */ |
| 2885 | 1104 statp->f_files = statp->f_ffree + usedobjs; |
| 789 | 1105 |
| 1106 (void) cmpldev(&d32, vfsp->vfs_dev); | |
| 1107 statp->f_fsid = d32; | |
| 1108 | |
| 1109 /* | |
| 1110 * We're a zfs filesystem. | |
| 1111 */ | |
| 1112 (void) strcpy(statp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name); | |
| 1113 | |
|
1123
02a0390fbc7d
6363529 UNIX03/UNIX98 *vsx* CAPI.os/files/fstatvfs/T.fstatvfs 11 FAILS
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849
diff
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|
1114 statp->f_flag = vf_to_stf(vfsp->vfs_flag); |
| 789 | 1115 |
| 1116 statp->f_namemax = ZFS_MAXNAMELEN; | |
| 1117 | |
| 1118 /* | |
| 1119 * We have all of 32 characters to stuff a string here. | |
| 1120 * Is there anything useful we could/should provide? | |
| 1121 */ | |
| 1122 bzero(statp->f_fstr, sizeof (statp->f_fstr)); | |
| 1123 | |
| 1124 ZFS_EXIT(zfsvfs); | |
| 1125 return (0); | |
| 1126 } | |
| 1127 | |
| 1128 static int | |
| 1129 zfs_root(vfs_t *vfsp, vnode_t **vpp) | |
| 1130 { | |
| 1131 zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
| 1132 znode_t *rootzp; | |
| 1133 int error; | |
| 1134 | |
| 1135 ZFS_ENTER(zfsvfs); | |
| 1136 | |
| 1137 error = zfs_zget(zfsvfs, zfsvfs->z_root, &rootzp); | |
| 1138 if (error == 0) | |
| 1139 *vpp = ZTOV(rootzp); | |
| 1140 | |
| 1141 ZFS_EXIT(zfsvfs); | |
| 1142 return (error); | |
| 1143 } | |
| 1144 | |
|
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|
1145 /* |
|
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|
1146 * Teardown the zfsvfs::z_os. |
|
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|
1147 * |
|
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|
1148 * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock' |
|
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|
1149 * and 'z_teardown_inactive_lock' held. |
|
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|
1150 */ |
|
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|
1151 static int |
|
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|
1152 zfsvfs_teardown(zfsvfs_t *zfsvfs, boolean_t unmounting) |
|
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|
1153 { |
|
5642
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6513209 Destroying pools under stress caused a hang in arc_flush
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|
1154 znode_t *zp; |
|
5326
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|
1155 |
|
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|
1156 rrw_enter(&zfsvfs->z_teardown_lock, RW_WRITER, FTAG); |
|
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|
1157 |
|
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|
1158 if (!unmounting) { |
|
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|
1159 /* |
|
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|
1160 * We purge the parent filesystem's vfsp as the parent |
|
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|
1161 * filesystem and all of its snapshots have their vnode's |
|
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|
1162 * v_vfsp set to the parent's filesystem's vfsp. Note, |
|
6752aa2bd5bc
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|
1163 * 'z_parent' is self referential for non-snapshots. |
|
6752aa2bd5bc
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|
1164 */ |
|
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|
1165 (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); |
|
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|
1166 } |
|
6752aa2bd5bc
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|
1167 |
|
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|
1168 /* |
|
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|
1169 * Close the zil. NB: Can't close the zil while zfs_inactive |
|
6752aa2bd5bc
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|
1170 * threads are blocked as zil_close can call zfs_inactive. |
|
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|
1171 */ |
|
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|
1172 if (zfsvfs->z_log) { |
|
6752aa2bd5bc
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|
1173 zil_close(zfsvfs->z_log); |
|
6752aa2bd5bc
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|
1174 zfsvfs->z_log = NULL; |
|
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|
1175 } |
|
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|
1176 |
|
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|
1177 rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_WRITER); |
|
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|
1178 |
|
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|
1179 /* |
|
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1180 * If we are not unmounting (ie: online recv) and someone already |
|
6752aa2bd5bc
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1181 * unmounted this file system while we were doing the switcheroo, |
|
6752aa2bd5bc
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|
1182 * or a reopen of z_os failed then just bail out now. |
|
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|
1183 */ |
|
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|
1184 if (!unmounting && (zfsvfs->z_unmounted || zfsvfs->z_os == NULL)) { |
|
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|
1185 rw_exit(&zfsvfs->z_teardown_inactive_lock); |
|
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|
1186 rrw_exit(&zfsvfs->z_teardown_lock, FTAG); |
|
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|
1187 return (EIO); |
|
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|
1188 } |
|
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|
1189 |
|
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|
1190 /* |
|
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|
1191 * At this point there are no vops active, and any new vops will |
|
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|
1192 * fail with EIO since we have z_teardown_lock for writer (only |
|
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|
1193 * relavent for forced unmount). |
|
6752aa2bd5bc
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|
1194 * |
|
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|
1195 * Release all holds on dbufs. |
|
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|
1196 */ |
|
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|
1197 mutex_enter(&zfsvfs->z_znodes_lock); |
|
5642
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|
1198 for (zp = list_head(&zfsvfs->z_all_znodes); zp != NULL; |
|
504c84876fda
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|
1199 zp = list_next(&zfsvfs->z_all_znodes, zp)) |
| 5446 | 1200 if (zp->z_dbuf) { |
|
5642
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6513209 Destroying pools under stress caused a hang in arc_flush
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changeset
|
1201 ASSERT(ZTOV(zp)->v_count > 0); |
|
504c84876fda
6513209 Destroying pools under stress caused a hang in arc_flush
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|
1202 zfs_znode_dmu_fini(zp); |
|
5326
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|
1203 } |
|
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|
1204 mutex_exit(&zfsvfs->z_znodes_lock); |
|
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|
1205 |
|
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|
1206 /* |
|
6752aa2bd5bc
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|
1207 * If we are unmounting, set the unmounted flag and let new vops |
|
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|
1208 * unblock. zfs_inactive will have the unmounted behavior, and all |
|
6752aa2bd5bc
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|
1209 * other vops will fail with EIO. |
|
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|
1210 */ |
|
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|
1211 if (unmounting) { |
|
6752aa2bd5bc
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|
1212 zfsvfs->z_unmounted = B_TRUE; |
|
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|
1213 rrw_exit(&zfsvfs->z_teardown_lock, FTAG); |
|
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|
1214 rw_exit(&zfsvfs->z_teardown_inactive_lock); |
|
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|
1215 } |
|
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|
1216 |
|
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|
1217 /* |
|
6752aa2bd5bc
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|
1218 * z_os will be NULL if there was an error in attempting to reopen |
|
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|
1219 * zfsvfs, so just return as the properties had already been |
|
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|
1220 * unregistered and cached data had been evicted before. |
|
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|
1221 */ |
|
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|
1222 if (zfsvfs->z_os == NULL) |
|
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|
1223 return (0); |
|
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|
1224 |
|
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1225 /* |
|
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|
1226 * Unregister properties. |
|
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1227 */ |
|
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|
1228 zfs_unregister_callbacks(zfsvfs); |
|
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1229 |
|
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1230 /* |
|
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|
1231 * Evict cached data |
|
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|
1232 */ |
|
6083
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
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|
1233 if (dmu_objset_evict_dbufs(zfsvfs->z_os)) { |
|
5429
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|
1234 txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0); |
|
6083
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
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|
1235 (void) dmu_objset_evict_dbufs(zfsvfs->z_os); |
|
5429
f0cb3b884d95
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|
1236 } |
|
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|
1237 |
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1238 return (0); |
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1239 } |
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|
1240 |
| 789 | 1241 /*ARGSUSED*/ |
| 1242 static int | |
| 1243 zfs_umount(vfs_t *vfsp, int fflag, cred_t *cr) | |
| 1244 { | |
| 1245 zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
|
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1246 objset_t *os; |
| 789 | 1247 int ret; |
| 1248 | |
| 4543 | 1249 ret = secpolicy_fs_unmount(cr, vfsp); |
| 1250 if (ret) { | |
| 1251 ret = dsl_deleg_access((char *)refstr_value(vfsp->vfs_resource), | |
| 1252 ZFS_DELEG_PERM_MOUNT, cr); | |
| 1253 if (ret) | |
| 1254 return (ret); | |
| 1255 } | |
|
1484
d330e98f8ed7
6350001 ZFS lookup performance still much slower than UFS : help tar : help spec SFS
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|
1256 |
|
4736
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|
1257 /* |
|
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|
1258 * We purge the parent filesystem's vfsp as the parent filesystem |
|
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1259 * and all of its snapshots have their vnode's v_vfsp set to the |
|
f8714efb3e12
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1260 * parent's filesystem's vfsp. Note, 'z_parent' is self |
|
f8714efb3e12
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1261 * referential for non-snapshots. |
|
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|
1262 */ |
|
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|
1263 (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); |
|
1484
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|
1264 |
| 789 | 1265 /* |
| 1266 * Unmount any snapshots mounted under .zfs before unmounting the | |
| 1267 * dataset itself. | |
| 1268 */ | |
| 1269 if (zfsvfs->z_ctldir != NULL && | |
| 4543 | 1270 (ret = zfsctl_umount_snapshots(vfsp, fflag, cr)) != 0) { |
| 789 | 1271 return (ret); |
| 4543 | 1272 } |
| 789 | 1273 |
| 4787 | 1274 if (!(fflag & MS_FORCE)) { |
|
4480
0976678e58c5
6544140 assertion failed: err == 0 (0x11 == 0x0), file: ../../common/fs/zfs/zfs_znode.c, line: 555
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|
1275 /* |
| 4787 | 1276 * Check the number of active vnodes in the file system. |
| 1277 * Our count is maintained in the vfs structure, but the | |
| 1278 * number is off by 1 to indicate a hold on the vfs | |
| 1279 * structure itself. | |
| 1280 * | |
| 1281 * The '.zfs' directory maintains a reference of its | |
| 1282 * own, and any active references underneath are | |
| 1283 * reflected in the vnode count. | |
| 789 | 1284 */ |
| 4787 | 1285 if (zfsvfs->z_ctldir == NULL) { |
| 1286 if (vfsp->vfs_count > 1) | |
| 1287 return (EBUSY); | |
| 1288 } else { | |
| 1289 if (vfsp->vfs_count > 2 || | |
|
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|
1290 zfsvfs->z_ctldir->v_count > 1) |
| 4787 | 1291 return (EBUSY); |
| 789 | 1292 } |
| 1293 } | |
| 1294 | |
| 1295 vfsp->vfs_flag |= VFS_UNMOUNTED; | |
| 4787 | 1296 |
|
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1297 VERIFY(zfsvfs_teardown(zfsvfs, B_TRUE) == 0); |
|
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|
1298 os = zfsvfs->z_os; |
| 4787 | 1299 |
| 1300 /* | |
|
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1301 * z_os will be NULL if there was an error in |
|
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|
1302 * attempting to reopen zfsvfs. |
| 4787 | 1303 */ |
|
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|
1304 if (os != NULL) { |
|
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|
1305 /* |
|
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|
1306 * Unset the objset user_ptr. |
|
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|
1307 */ |
|
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|
1308 mutex_enter(&os->os->os_user_ptr_lock); |
|
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|
1309 dmu_objset_set_user(os, NULL); |
|
6752aa2bd5bc
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|
1310 mutex_exit(&os->os->os_user_ptr_lock); |
| 4787 | 1311 |
|
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|
1312 /* |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6570
diff
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|
1313 * Finally release the objset |
|
5326
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|
1314 */ |
|
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|
1315 dmu_objset_close(os); |
| 4787 | 1316 } |
| 1317 | |
| 1318 /* | |
| 1319 * We can now safely destroy the '.zfs' directory node. | |
| 1320 */ | |
| 1321 if (zfsvfs->z_ctldir != NULL) | |
| 1322 zfsctl_destroy(zfsvfs); | |
| 789 | 1323 |
| 1324 return (0); | |
| 1325 } | |
| 1326 | |
| 1327 static int | |
| 1328 zfs_vget(vfs_t *vfsp, vnode_t **vpp, fid_t *fidp) | |
| 1329 { | |
| 1330 zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
| 1331 znode_t *zp; | |
| 1332 uint64_t object = 0; | |
| 1333 uint64_t fid_gen = 0; | |
| 1334 uint64_t gen_mask; | |
| 1335 uint64_t zp_gen; | |
| 1336 int i, err; | |
| 1337 | |
| 1338 *vpp = NULL; | |
| 1339 | |
| 1340 ZFS_ENTER(zfsvfs); | |
| 1341 | |
| 1342 if (fidp->fid_len == LONG_FID_LEN) { | |
| 1343 zfid_long_t *zlfid = (zfid_long_t *)fidp; | |
| 1344 uint64_t objsetid = 0; | |
| 1345 uint64_t setgen = 0; | |
| 1346 | |
| 1347 for (i = 0; i < sizeof (zlfid->zf_setid); i++) | |
| 1348 objsetid |= ((uint64_t)zlfid->zf_setid[i]) << (8 * i); | |
| 1349 | |
| 1350 for (i = 0; i < sizeof (zlfid->zf_setgen); i++) | |
| 1351 setgen |= ((uint64_t)zlfid->zf_setgen[i]) << (8 * i); | |
| 1352 | |
| 1353 ZFS_EXIT(zfsvfs); | |
| 1354 | |
| 1355 err = zfsctl_lookup_objset(vfsp, objsetid, &zfsvfs); | |
| 1356 if (err) | |
| 1357 return (EINVAL); | |
| 1358 ZFS_ENTER(zfsvfs); | |
| 1359 } | |
| 1360 | |
| 1361 if (fidp->fid_len == SHORT_FID_LEN || fidp->fid_len == LONG_FID_LEN) { | |
| 1362 zfid_short_t *zfid = (zfid_short_t *)fidp; | |
| 1363 | |
| 1364 for (i = 0; i < sizeof (zfid->zf_object); i++) | |
| 1365 object |= ((uint64_t)zfid->zf_object[i]) << (8 * i); | |
| 1366 | |
| 1367 for (i = 0; i < sizeof (zfid->zf_gen); i++) | |
| 1368 fid_gen |= ((uint64_t)zfid->zf_gen[i]) << (8 * i); | |
| 1369 } else { | |
| 1370 ZFS_EXIT(zfsvfs); | |
| 1371 return (EINVAL); | |
| 1372 } | |
| 1373 | |
| 1374 /* A zero fid_gen means we are in the .zfs control directories */ | |
| 1375 if (fid_gen == 0 && | |
| 1376 (object == ZFSCTL_INO_ROOT || object == ZFSCTL_INO_SNAPDIR)) { | |
| 1377 *vpp = zfsvfs->z_ctldir; | |
| 1378 ASSERT(*vpp != NULL); | |
| 1379 if (object == ZFSCTL_INO_SNAPDIR) { | |
| 1380 VERIFY(zfsctl_root_lookup(*vpp, "snapshot", vpp, NULL, | |
| 5331 | 1381 0, NULL, NULL, NULL, NULL, NULL) == 0); |
| 789 | 1382 } else { |
| 1383 VN_HOLD(*vpp); | |
| 1384 } | |
| 1385 ZFS_EXIT(zfsvfs); | |
| 1386 return (0); | |
| 1387 } | |
| 1388 | |
| 1389 gen_mask = -1ULL >> (64 - 8 * i); | |
| 1390 | |
| 1391 dprintf("getting %llu [%u mask %llx]\n", object, fid_gen, gen_mask); | |
| 1392 if (err = zfs_zget(zfsvfs, object, &zp)) { | |
| 1393 ZFS_EXIT(zfsvfs); | |
| 1394 return (err); | |
| 1395 } | |
| 1396 zp_gen = zp->z_phys->zp_gen & gen_mask; | |
| 1397 if (zp_gen == 0) | |
| 1398 zp_gen = 1; | |
| 3461 | 1399 if (zp->z_unlinked || zp_gen != fid_gen) { |
| 789 | 1400 dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen, fid_gen); |
| 1401 VN_RELE(ZTOV(zp)); | |
| 1402 ZFS_EXIT(zfsvfs); | |
| 1403 return (EINVAL); | |
| 1404 } | |
| 1405 | |
| 1406 *vpp = ZTOV(zp); | |
| 1407 ZFS_EXIT(zfsvfs); | |
| 1408 return (0); | |
| 1409 } | |
| 1410 | |
|
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1411 /* |
|
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|
1412 * Block out VOPs and close zfsvfs_t::z_os |
|
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|
1413 * |
|
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|
1414 * Note, if successful, then we return with the 'z_teardown_lock' and |
|
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1415 * 'z_teardown_inactive_lock' write held. |
|
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|
1416 */ |
|
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|
1417 int |
|
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|
1418 zfs_suspend_fs(zfsvfs_t *zfsvfs, char *name, int *mode) |
|
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1419 { |
|
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|
1420 int error; |
|
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|
1421 |
|
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1422 if ((error = zfsvfs_teardown(zfsvfs, B_FALSE)) != 0) |
|
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1423 return (error); |
|
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|
1424 |
|
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|
1425 *mode = zfsvfs->z_os->os_mode; |
|
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1426 dmu_objset_name(zfsvfs->z_os, name); |
|
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1427 dmu_objset_close(zfsvfs->z_os); |
|
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|
1428 |
|
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|
1429 return (0); |
|
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|
1430 } |
|
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|
1431 |
|
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|
1432 /* |
|
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1433 * Reopen zfsvfs_t::z_os and release VOPs. |
|
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1434 */ |
|
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|
1435 int |
|
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|
1436 zfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname, int mode) |
|
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|
1437 { |
|
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|
1438 int err; |
|
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|
1439 |
|
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1440 ASSERT(RRW_WRITE_HELD(&zfsvfs->z_teardown_lock)); |
|
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1441 ASSERT(RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock)); |
|
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|
1442 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
1443 err = dmu_objset_open(osname, DMU_OST_ZFS, mode, &zfsvfs->z_os); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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changeset
|
1444 if (err) { |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
1445 zfsvfs->z_os = NULL; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
1446 } else { |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
1447 znode_t *zp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
1448 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1449 VERIFY(zfsvfs_setup(zfsvfs, B_FALSE) == 0); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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|
1450 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
1451 /* |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1452 * Attempt to re-establish all the active znodes with |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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diff
changeset
|
1453 * their dbufs. If a zfs_rezget() fails, then we'll let |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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|
1454 * any potential callers discover that via ZFS_ENTER_VERIFY_VP |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1455 * when they try to use their znode. |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1456 */ |
|
6752aa2bd5bc
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|
1457 mutex_enter(&zfsvfs->z_znodes_lock); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1458 for (zp = list_head(&zfsvfs->z_all_znodes); zp; |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1459 zp = list_next(&zfsvfs->z_all_znodes, zp)) { |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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changeset
|
1460 (void) zfs_rezget(zp); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1461 } |
|
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6425096 want online 'zfs recv' (read only and read/write)
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|
1462 mutex_exit(&zfsvfs->z_znodes_lock); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1463 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1464 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1465 |
|
6752aa2bd5bc
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|
1466 /* release the VOPs */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1467 rw_exit(&zfsvfs->z_teardown_inactive_lock); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1468 rrw_exit(&zfsvfs->z_teardown_lock, FTAG); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1469 |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1470 if (err) { |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1471 /* |
|
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|
1472 * Since we couldn't reopen zfsvfs::z_os, force |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1473 * unmount this file system. |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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changeset
|
1474 */ |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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parents:
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|
1475 if (vn_vfswlock(zfsvfs->z_vfs->vfs_vnodecovered) == 0) |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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diff
changeset
|
1476 (void) dounmount(zfsvfs->z_vfs, MS_FORCE, CRED()); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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changeset
|
1477 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1478 return (err); |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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changeset
|
1479 } |
|
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
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|
1480 |
| 789 | 1481 static void |
| 1482 zfs_freevfs(vfs_t *vfsp) | |
| 1483 { | |
| 1484 zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
|
4831
41ec732c6d9f
6584470 zdb needs to initialize the bpl_lock mutex
gw25295
parents:
4787
diff
changeset
|
1485 int i; |
|
41ec732c6d9f
6584470 zdb needs to initialize the bpl_lock mutex
gw25295
parents:
4787
diff
changeset
|
1486 |
|
41ec732c6d9f
6584470 zdb needs to initialize the bpl_lock mutex
gw25295
parents:
4787
diff
changeset
|
1487 for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) |
|
41ec732c6d9f
6584470 zdb needs to initialize the bpl_lock mutex
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parents:
4787
diff
changeset
|
1488 mutex_destroy(&zfsvfs->z_hold_mtx[i]); |
| 789 | 1489 |
| 5331 | 1490 zfs_fuid_destroy(zfsvfs); |
|
6083
23e77aa611b1
6655963 Panic: 0 == zap_add(mos, pds->dd_phys->dd_child_dir_zapobj, name, sizeof (uint64_t), 1, &ddobj, tx)
ek110237
parents:
5648
diff
changeset
|
1491 zfs_freezfsvfs(zfsvfs); |
| 789 | 1492 |
| 1493 atomic_add_32(&zfs_active_fs_count, -1); | |
| 1494 } | |
| 1495 | |
| 1496 /* | |
| 1497 * VFS_INIT() initialization. Note that there is no VFS_FINI(), | |
| 1498 * so we can't safely do any non-idempotent initialization here. | |
| 1499 * Leave that to zfs_init() and zfs_fini(), which are called | |
| 1500 * from the module's _init() and _fini() entry points. | |
| 1501 */ | |
| 1502 /*ARGSUSED*/ | |
| 1503 static int | |
| 1504 zfs_vfsinit(int fstype, char *name) | |
| 1505 { | |
| 1506 int error; | |
| 1507 | |
| 1508 zfsfstype = fstype; | |
| 1509 | |
| 1510 /* | |
| 1511 * Setup vfsops and vnodeops tables. | |
| 1512 */ | |
| 1513 error = vfs_setfsops(fstype, zfs_vfsops_template, &zfs_vfsops); | |
| 1514 if (error != 0) { | |
| 1515 cmn_err(CE_WARN, "zfs: bad vfs ops template"); | |
| 1516 } | |
| 1517 | |
| 1518 error = zfs_create_op_tables(); | |
| 1519 if (error) { | |
| 1520 zfs_remove_op_tables(); | |
| 1521 cmn_err(CE_WARN, "zfs: bad vnode ops template"); | |
| 1522 (void) vfs_freevfsops_by_type(zfsfstype); | |
| 1523 return (error); | |
| 1524 } | |
| 1525 | |
| 1526 mutex_init(&zfs_dev_mtx, NULL, MUTEX_DEFAULT, NULL); | |
| 1527 | |
| 1528 /* | |
|
849
8d799fd81a9b
6345023 /dev/zfs fails to open once ZFS module is unloaded
bonwick
parents:
789
diff
changeset
|
1529 * Unique major number for all zfs mounts. |
|
8d799fd81a9b
6345023 /dev/zfs fails to open once ZFS module is unloaded
bonwick
parents:
789
diff
changeset
|
1530 * If we run out of 32-bit minors, we'll getudev() another major. |
| 789 | 1531 */ |
|
849
8d799fd81a9b
6345023 /dev/zfs fails to open once ZFS module is unloaded
bonwick
parents:
789
diff
changeset
|
1532 zfs_major = ddi_name_to_major(ZFS_DRIVER); |
|
8d799fd81a9b
6345023 /dev/zfs fails to open once ZFS module is unloaded
bonwick
parents:
789
diff
changeset
|
1533 zfs_minor = ZFS_MIN_MINOR; |
| 789 | 1534 |
| 1535 return (0); | |
| 1536 } | |
| 1537 | |
| 1538 void | |
| 1539 zfs_init(void) | |
| 1540 { | |
| 1541 /* | |
| 1542 * Initialize .zfs directory structures | |
| 1543 */ | |
| 1544 zfsctl_init(); | |
| 1545 | |
| 1546 /* | |
| 1547 * Initialize znode cache, vnode ops, etc... | |
| 1548 */ | |
| 1549 zfs_znode_init(); | |
| 1550 } | |
| 1551 | |
| 1552 void | |
| 1553 zfs_fini(void) | |
| 1554 { | |
| 1555 zfsctl_fini(); | |
| 1556 zfs_znode_fini(); | |
| 1557 } | |
| 1558 | |
| 1559 int | |
| 1560 zfs_busy(void) | |
| 1561 { | |
| 1562 return (zfs_active_fs_count != 0); | |
| 1563 } | |
| 1564 | |
| 4577 | 1565 int |
| 1566 zfs_set_version(const char *name, uint64_t newvers) | |
| 1567 { | |
| 1568 int error; | |
| 1569 objset_t *os; | |
| 1570 dmu_tx_t *tx; | |
| 1571 uint64_t curvers; | |
| 1572 | |
| 1573 /* | |
| 1574 * XXX for now, require that the filesystem be unmounted. Would | |
| 1575 * be nice to find the zfsvfs_t and just update that if | |
| 1576 * possible. | |
| 1577 */ | |
| 1578 | |
| 1579 if (newvers < ZPL_VERSION_INITIAL || newvers > ZPL_VERSION) | |
| 1580 return (EINVAL); | |
| 1581 | |
|
6689
47572a2f5e73
6610506 Eliminate or improve retry logic from callers of dmu_objset_open()
maybee
parents:
6570
diff
changeset
|
1582 error = dmu_objset_open(name, DMU_OST_ZFS, DS_MODE_OWNER, &os); |
| 4577 | 1583 if (error) |
| 1584 return (error); | |
| 1585 | |
| 1586 error = zap_lookup(os, MASTER_NODE_OBJ, ZPL_VERSION_STR, | |
| 1587 8, 1, &curvers); | |
| 1588 if (error) | |
| 1589 goto out; | |
| 1590 if (newvers < curvers) { | |
| 1591 error = EINVAL; | |
| 1592 goto out; | |
| 1593 } | |
| 1594 | |
| 1595 tx = dmu_tx_create(os); | |
| 1596 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, 0, ZPL_VERSION_STR); | |
| 1597 error = dmu_tx_assign(tx, TXG_WAIT); | |
| 1598 if (error) { | |
| 1599 dmu_tx_abort(tx); | |
| 1600 goto out; | |
| 1601 } | |
| 1602 error = zap_update(os, MASTER_NODE_OBJ, ZPL_VERSION_STR, 8, 1, | |
| 1603 &newvers, tx); | |
| 1604 | |
| 1605 spa_history_internal_log(LOG_DS_UPGRADE, | |
| 1606 dmu_objset_spa(os), tx, CRED(), | |
| 1607 "oldver=%llu newver=%llu dataset = %llu", curvers, newvers, | |
| 1608 dmu_objset_id(os)); | |
| 1609 dmu_tx_commit(tx); | |
| 1610 | |
| 1611 out: | |
| 1612 dmu_objset_close(os); | |
| 1613 return (error); | |
| 1614 } | |
| 1615 | |
|
5498
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1616 /* |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1617 * Read a property stored within the master node. |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1618 */ |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
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diff
changeset
|
1619 int |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
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5489
diff
changeset
|
1620 zfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value) |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
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diff
changeset
|
1621 { |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1622 const char *pname; |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1623 int error; |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1624 |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1625 /* |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1626 * Look up the file system's value for the property. For the |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1627 * version property, we look up a slightly different string. |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1628 */ |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1629 if (prop == ZFS_PROP_VERSION) |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1630 pname = ZPL_VERSION_STR; |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1631 else |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1632 pname = zfs_prop_to_name(prop); |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1633 |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1634 error = zap_lookup(os, MASTER_NODE_OBJ, pname, 8, 1, value); |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1635 |
| 6404 | 1636 if (error == ENOENT) { |
|
5498
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1637 /* No value set, use the default value */ |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1638 switch (prop) { |
| 6404 | 1639 case ZFS_PROP_VERSION: |
| 1640 *value = ZPL_VERSION; | |
| 1641 break; | |
|
5498
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1642 case ZFS_PROP_NORMALIZE: |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1643 case ZFS_PROP_UTF8ONLY: |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1644 *value = 0; |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1645 break; |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1646 case ZFS_PROP_CASE: |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1647 *value = ZFS_CASE_SENSITIVE; |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1648 break; |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1649 default: |
| 6404 | 1650 return (error); |
|
5498
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1651 } |
| 6404 | 1652 error = 0; |
|
5498
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1653 } |
| 6404 | 1654 return (error); |
|
5498
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1655 } |
|
334b476844ca
6622831 normalization properties are not preserved by "zfs send"
timh
parents:
5489
diff
changeset
|
1656 |
| 789 | 1657 static vfsdef_t vfw = { |
| 1658 VFSDEF_VERSION, | |
| 1659 MNTTYPE_ZFS, | |
| 1660 zfs_vfsinit, | |
| 5331 | 1661 VSW_HASPROTO|VSW_CANRWRO|VSW_CANREMOUNT|VSW_VOLATILEDEV|VSW_STATS| |
| 1662 VSW_XID, | |
| 789 | 1663 &zfs_mntopts |
| 1664 }; | |
| 1665 | |
| 1666 struct modlfs zfs_modlfs = { | |
| 4577 | 1667 &mod_fsops, "ZFS filesystem version " SPA_VERSION_STRING, &vfw |
| 789 | 1668 }; |