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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
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 | /* | |
9babb374 | 22 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f BB |
23 | * Use is subject to license terms. |
24 | */ | |
25 | ||
34dc7c2f BB |
26 | #include <sys/types.h> |
27 | #include <sys/param.h> | |
28 | #include <sys/systm.h> | |
29 | #include <sys/sysmacros.h> | |
30 | #include <sys/kmem.h> | |
31 | #include <sys/pathname.h> | |
32 | #include <sys/vnode.h> | |
33 | #include <sys/vfs.h> | |
34 | #include <sys/vfs_opreg.h> | |
35 | #include <sys/mntent.h> | |
36 | #include <sys/mount.h> | |
37 | #include <sys/cmn_err.h> | |
38 | #include "fs/fs_subr.h" | |
39 | #include <sys/zfs_znode.h> | |
40 | #include <sys/zfs_dir.h> | |
41 | #include <sys/zil.h> | |
42 | #include <sys/fs/zfs.h> | |
43 | #include <sys/dmu.h> | |
44 | #include <sys/dsl_prop.h> | |
45 | #include <sys/dsl_dataset.h> | |
46 | #include <sys/dsl_deleg.h> | |
47 | #include <sys/spa.h> | |
48 | #include <sys/zap.h> | |
49 | #include <sys/varargs.h> | |
50 | #include <sys/policy.h> | |
51 | #include <sys/atomic.h> | |
52 | #include <sys/mkdev.h> | |
53 | #include <sys/modctl.h> | |
54 | #include <sys/refstr.h> | |
55 | #include <sys/zfs_ioctl.h> | |
56 | #include <sys/zfs_ctldir.h> | |
57 | #include <sys/zfs_fuid.h> | |
58 | #include <sys/bootconf.h> | |
59 | #include <sys/sunddi.h> | |
60 | #include <sys/dnlc.h> | |
61 | #include <sys/dmu_objset.h> | |
62 | #include <sys/spa_boot.h> | |
63 | ||
64 | int zfsfstype; | |
65 | vfsops_t *zfs_vfsops = NULL; | |
66 | static major_t zfs_major; | |
67 | static minor_t zfs_minor; | |
68 | static kmutex_t zfs_dev_mtx; | |
69 | ||
9babb374 BB |
70 | extern int sys_shutdown; |
71 | ||
34dc7c2f BB |
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); | |
74 | static int zfs_mountroot(vfs_t *vfsp, enum whymountroot); | |
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[] = { | |
81 | VFSNAME_MOUNT, { .vfs_mount = zfs_mount }, | |
82 | VFSNAME_MOUNTROOT, { .vfs_mountroot = zfs_mountroot }, | |
83 | VFSNAME_UNMOUNT, { .vfs_unmount = zfs_umount }, | |
84 | VFSNAME_ROOT, { .vfs_root = zfs_root }, | |
85 | VFSNAME_STATVFS, { .vfs_statvfs = zfs_statvfs }, | |
86 | VFSNAME_SYNC, { .vfs_sync = zfs_sync }, | |
87 | VFSNAME_VGET, { .vfs_vget = zfs_vget }, | |
88 | VFSNAME_FREEVFS, { .vfs_freevfs = zfs_freevfs }, | |
89 | NULL, NULL | |
90 | }; | |
91 | ||
92 | static const fs_operation_def_t zfs_vfsops_eio_template[] = { | |
93 | VFSNAME_FREEVFS, { .vfs_freevfs = zfs_freevfs }, | |
94 | NULL, NULL | |
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 }; | |
106 | static char *noxattr_cancel[] = { MNTOPT_XATTR, NULL }; | |
107 | static char *xattr_cancel[] = { MNTOPT_NOXATTR, NULL }; | |
108 | ||
109 | /* | |
110 | * MO_DEFAULT is not used since the default value is determined | |
111 | * by the equivalent property. | |
112 | */ | |
113 | static mntopt_t mntopts[] = { | |
114 | { MNTOPT_NOXATTR, noxattr_cancel, NULL, 0, NULL }, | |
115 | { MNTOPT_XATTR, xattr_cancel, NULL, 0, NULL }, | |
116 | { MNTOPT_NOATIME, noatime_cancel, NULL, 0, NULL }, | |
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; | |
9babb374 | 150 | dsl_pool_t *dp; |
34dc7c2f BB |
151 | |
152 | ZFS_ENTER(zfsvfs); | |
9babb374 BB |
153 | dp = dmu_objset_pool(zfsvfs->z_os); |
154 | ||
155 | /* | |
156 | * If the system is shutting down, then skip any | |
157 | * filesystems which may exist on a suspended pool. | |
158 | */ | |
159 | if (sys_shutdown && spa_suspended(dp->dp_spa)) { | |
160 | ZFS_EXIT(zfsvfs); | |
161 | return (0); | |
162 | } | |
163 | ||
34dc7c2f BB |
164 | if (zfsvfs->z_log != NULL) |
165 | zil_commit(zfsvfs->z_log, UINT64_MAX, 0); | |
166 | else | |
9babb374 | 167 | txg_wait_synced(dp, 0); |
34dc7c2f BB |
168 | ZFS_EXIT(zfsvfs); |
169 | } else { | |
170 | /* | |
171 | * Sync all ZFS filesystems. This is what happens when you | |
172 | * run sync(1M). Unlike other filesystems, ZFS honors the | |
173 | * request by waiting for all pools to commit all dirty data. | |
174 | */ | |
175 | spa_sync_allpools(); | |
176 | } | |
177 | ||
178 | return (0); | |
179 | } | |
180 | ||
181 | static int | |
182 | zfs_create_unique_device(dev_t *dev) | |
183 | { | |
184 | major_t new_major; | |
185 | ||
186 | do { | |
187 | ASSERT3U(zfs_minor, <=, MAXMIN32); | |
188 | minor_t start = zfs_minor; | |
189 | do { | |
190 | mutex_enter(&zfs_dev_mtx); | |
191 | if (zfs_minor >= MAXMIN32) { | |
192 | /* | |
193 | * If we're still using the real major | |
194 | * keep out of /dev/zfs and /dev/zvol minor | |
195 | * number space. If we're using a getudev()'ed | |
196 | * major number, we can use all of its minors. | |
197 | */ | |
198 | if (zfs_major == ddi_name_to_major(ZFS_DRIVER)) | |
199 | zfs_minor = ZFS_MIN_MINOR; | |
200 | else | |
201 | zfs_minor = 0; | |
202 | } else { | |
203 | zfs_minor++; | |
204 | } | |
205 | *dev = makedevice(zfs_major, zfs_minor); | |
206 | mutex_exit(&zfs_dev_mtx); | |
207 | } while (vfs_devismounted(*dev) && zfs_minor != start); | |
208 | if (zfs_minor == start) { | |
209 | /* | |
210 | * We are using all ~262,000 minor numbers for the | |
211 | * current major number. Create a new major number. | |
212 | */ | |
213 | if ((new_major = getudev()) == (major_t)-1) { | |
214 | cmn_err(CE_WARN, | |
215 | "zfs_mount: Can't get unique major " | |
216 | "device number."); | |
217 | return (-1); | |
218 | } | |
219 | mutex_enter(&zfs_dev_mtx); | |
220 | zfs_major = new_major; | |
221 | zfs_minor = 0; | |
222 | ||
223 | mutex_exit(&zfs_dev_mtx); | |
224 | } else { | |
225 | break; | |
226 | } | |
227 | /* CONSTANTCONDITION */ | |
228 | } while (1); | |
229 | ||
230 | return (0); | |
231 | } | |
232 | ||
233 | static void | |
234 | atime_changed_cb(void *arg, uint64_t newval) | |
235 | { | |
236 | zfsvfs_t *zfsvfs = arg; | |
237 | ||
238 | if (newval == TRUE) { | |
239 | zfsvfs->z_atime = TRUE; | |
240 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME); | |
241 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_ATIME, NULL, 0); | |
242 | } else { | |
243 | zfsvfs->z_atime = FALSE; | |
244 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_ATIME); | |
245 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME, NULL, 0); | |
246 | } | |
247 | } | |
248 | ||
249 | static void | |
250 | xattr_changed_cb(void *arg, uint64_t newval) | |
251 | { | |
252 | zfsvfs_t *zfsvfs = arg; | |
253 | ||
254 | if (newval == TRUE) { | |
255 | /* XXX locking on vfs_flag? */ | |
256 | zfsvfs->z_vfs->vfs_flag |= VFS_XATTR; | |
257 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR); | |
258 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_XATTR, NULL, 0); | |
259 | } else { | |
260 | /* XXX locking on vfs_flag? */ | |
261 | zfsvfs->z_vfs->vfs_flag &= ~VFS_XATTR; | |
262 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_XATTR); | |
263 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR, NULL, 0); | |
264 | } | |
265 | } | |
266 | ||
267 | static void | |
268 | blksz_changed_cb(void *arg, uint64_t newval) | |
269 | { | |
270 | zfsvfs_t *zfsvfs = arg; | |
271 | ||
272 | if (newval < SPA_MINBLOCKSIZE || | |
273 | newval > SPA_MAXBLOCKSIZE || !ISP2(newval)) | |
274 | newval = SPA_MAXBLOCKSIZE; | |
275 | ||
276 | zfsvfs->z_max_blksz = newval; | |
277 | zfsvfs->z_vfs->vfs_bsize = newval; | |
278 | } | |
279 | ||
280 | static void | |
281 | readonly_changed_cb(void *arg, uint64_t newval) | |
282 | { | |
283 | zfsvfs_t *zfsvfs = arg; | |
284 | ||
285 | if (newval) { | |
286 | /* XXX locking on vfs_flag? */ | |
287 | zfsvfs->z_vfs->vfs_flag |= VFS_RDONLY; | |
288 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RW); | |
289 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RO, NULL, 0); | |
290 | } else { | |
291 | /* XXX locking on vfs_flag? */ | |
292 | zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; | |
293 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RO); | |
294 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RW, NULL, 0); | |
295 | } | |
296 | } | |
297 | ||
298 | static void | |
299 | devices_changed_cb(void *arg, uint64_t newval) | |
300 | { | |
301 | zfsvfs_t *zfsvfs = arg; | |
302 | ||
303 | if (newval == FALSE) { | |
304 | zfsvfs->z_vfs->vfs_flag |= VFS_NODEVICES; | |
305 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_DEVICES); | |
306 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NODEVICES, NULL, 0); | |
307 | } else { | |
308 | zfsvfs->z_vfs->vfs_flag &= ~VFS_NODEVICES; | |
309 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NODEVICES); | |
310 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_DEVICES, NULL, 0); | |
311 | } | |
312 | } | |
313 | ||
314 | static void | |
315 | setuid_changed_cb(void *arg, uint64_t newval) | |
316 | { | |
317 | zfsvfs_t *zfsvfs = arg; | |
318 | ||
319 | if (newval == FALSE) { | |
320 | zfsvfs->z_vfs->vfs_flag |= VFS_NOSETUID; | |
321 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_SETUID); | |
322 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID, NULL, 0); | |
323 | } else { | |
324 | zfsvfs->z_vfs->vfs_flag &= ~VFS_NOSETUID; | |
325 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID); | |
326 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_SETUID, NULL, 0); | |
327 | } | |
328 | } | |
329 | ||
330 | static void | |
331 | exec_changed_cb(void *arg, uint64_t newval) | |
332 | { | |
333 | zfsvfs_t *zfsvfs = arg; | |
334 | ||
335 | if (newval == FALSE) { | |
336 | zfsvfs->z_vfs->vfs_flag |= VFS_NOEXEC; | |
337 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_EXEC); | |
338 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC, NULL, 0); | |
339 | } else { | |
340 | zfsvfs->z_vfs->vfs_flag &= ~VFS_NOEXEC; | |
341 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC); | |
342 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_EXEC, NULL, 0); | |
343 | } | |
344 | } | |
345 | ||
346 | /* | |
347 | * The nbmand mount option can be changed at mount time. | |
348 | * We can't allow it to be toggled on live file systems or incorrect | |
349 | * behavior may be seen from cifs clients | |
350 | * | |
351 | * This property isn't registered via dsl_prop_register(), but this callback | |
352 | * will be called when a file system is first mounted | |
353 | */ | |
354 | static void | |
355 | nbmand_changed_cb(void *arg, uint64_t newval) | |
356 | { | |
357 | zfsvfs_t *zfsvfs = arg; | |
358 | if (newval == FALSE) { | |
359 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND); | |
360 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND, NULL, 0); | |
361 | } else { | |
362 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND); | |
363 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND, NULL, 0); | |
364 | } | |
365 | } | |
366 | ||
367 | static void | |
368 | snapdir_changed_cb(void *arg, uint64_t newval) | |
369 | { | |
370 | zfsvfs_t *zfsvfs = arg; | |
371 | ||
372 | zfsvfs->z_show_ctldir = newval; | |
373 | } | |
374 | ||
375 | static void | |
376 | vscan_changed_cb(void *arg, uint64_t newval) | |
377 | { | |
378 | zfsvfs_t *zfsvfs = arg; | |
379 | ||
380 | zfsvfs->z_vscan = newval; | |
381 | } | |
382 | ||
383 | static void | |
384 | acl_mode_changed_cb(void *arg, uint64_t newval) | |
385 | { | |
386 | zfsvfs_t *zfsvfs = arg; | |
387 | ||
388 | zfsvfs->z_acl_mode = newval; | |
389 | } | |
390 | ||
391 | static void | |
392 | acl_inherit_changed_cb(void *arg, uint64_t newval) | |
393 | { | |
394 | zfsvfs_t *zfsvfs = arg; | |
395 | ||
396 | zfsvfs->z_acl_inherit = newval; | |
397 | } | |
398 | ||
399 | static int | |
400 | zfs_register_callbacks(vfs_t *vfsp) | |
401 | { | |
402 | struct dsl_dataset *ds = NULL; | |
403 | objset_t *os = NULL; | |
404 | zfsvfs_t *zfsvfs = NULL; | |
405 | uint64_t nbmand; | |
406 | int readonly, do_readonly = B_FALSE; | |
407 | int setuid, do_setuid = B_FALSE; | |
408 | int exec, do_exec = B_FALSE; | |
409 | int devices, do_devices = B_FALSE; | |
410 | int xattr, do_xattr = B_FALSE; | |
411 | int atime, do_atime = B_FALSE; | |
412 | int error = 0; | |
413 | ||
414 | ASSERT(vfsp); | |
415 | zfsvfs = vfsp->vfs_data; | |
416 | ASSERT(zfsvfs); | |
417 | os = zfsvfs->z_os; | |
418 | ||
419 | /* | |
420 | * The act of registering our callbacks will destroy any mount | |
421 | * options we may have. In order to enable temporary overrides | |
422 | * of mount options, we stash away the current values and | |
423 | * restore them after we register the callbacks. | |
424 | */ | |
425 | if (vfs_optionisset(vfsp, MNTOPT_RO, NULL)) { | |
426 | readonly = B_TRUE; | |
427 | do_readonly = B_TRUE; | |
428 | } else if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) { | |
429 | readonly = B_FALSE; | |
430 | do_readonly = B_TRUE; | |
431 | } | |
432 | if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) { | |
433 | devices = B_FALSE; | |
434 | setuid = B_FALSE; | |
435 | do_devices = B_TRUE; | |
436 | do_setuid = B_TRUE; | |
437 | } else { | |
438 | if (vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL)) { | |
439 | devices = B_FALSE; | |
440 | do_devices = B_TRUE; | |
441 | } else if (vfs_optionisset(vfsp, MNTOPT_DEVICES, NULL)) { | |
442 | devices = B_TRUE; | |
443 | do_devices = B_TRUE; | |
444 | } | |
445 | ||
446 | if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) { | |
447 | setuid = B_FALSE; | |
448 | do_setuid = B_TRUE; | |
449 | } else if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) { | |
450 | setuid = B_TRUE; | |
451 | do_setuid = B_TRUE; | |
452 | } | |
453 | } | |
454 | if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) { | |
455 | exec = B_FALSE; | |
456 | do_exec = B_TRUE; | |
457 | } else if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) { | |
458 | exec = B_TRUE; | |
459 | do_exec = B_TRUE; | |
460 | } | |
461 | if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL)) { | |
462 | xattr = B_FALSE; | |
463 | do_xattr = B_TRUE; | |
464 | } else if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL)) { | |
465 | xattr = B_TRUE; | |
466 | do_xattr = B_TRUE; | |
467 | } | |
468 | if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) { | |
469 | atime = B_FALSE; | |
470 | do_atime = B_TRUE; | |
471 | } else if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL)) { | |
472 | atime = B_TRUE; | |
473 | do_atime = B_TRUE; | |
474 | } | |
475 | ||
476 | /* | |
477 | * nbmand is a special property. It can only be changed at | |
478 | * mount time. | |
479 | * | |
480 | * This is weird, but it is documented to only be changeable | |
481 | * at mount time. | |
482 | */ | |
483 | if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) { | |
484 | nbmand = B_FALSE; | |
485 | } else if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) { | |
486 | nbmand = B_TRUE; | |
487 | } else { | |
488 | char osname[MAXNAMELEN]; | |
489 | ||
490 | dmu_objset_name(os, osname); | |
491 | if (error = dsl_prop_get_integer(osname, "nbmand", &nbmand, | |
b128c09f BB |
492 | NULL)) { |
493 | return (error); | |
494 | } | |
34dc7c2f BB |
495 | } |
496 | ||
497 | /* | |
498 | * Register property callbacks. | |
499 | * | |
500 | * It would probably be fine to just check for i/o error from | |
501 | * the first prop_register(), but I guess I like to go | |
502 | * overboard... | |
503 | */ | |
504 | ds = dmu_objset_ds(os); | |
505 | error = dsl_prop_register(ds, "atime", atime_changed_cb, zfsvfs); | |
506 | error = error ? error : dsl_prop_register(ds, | |
507 | "xattr", xattr_changed_cb, zfsvfs); | |
508 | error = error ? error : dsl_prop_register(ds, | |
509 | "recordsize", blksz_changed_cb, zfsvfs); | |
510 | error = error ? error : dsl_prop_register(ds, | |
511 | "readonly", readonly_changed_cb, zfsvfs); | |
512 | error = error ? error : dsl_prop_register(ds, | |
513 | "devices", devices_changed_cb, zfsvfs); | |
514 | error = error ? error : dsl_prop_register(ds, | |
515 | "setuid", setuid_changed_cb, zfsvfs); | |
516 | error = error ? error : dsl_prop_register(ds, | |
517 | "exec", exec_changed_cb, zfsvfs); | |
518 | error = error ? error : dsl_prop_register(ds, | |
519 | "snapdir", snapdir_changed_cb, zfsvfs); | |
520 | error = error ? error : dsl_prop_register(ds, | |
521 | "aclmode", acl_mode_changed_cb, zfsvfs); | |
522 | error = error ? error : dsl_prop_register(ds, | |
523 | "aclinherit", acl_inherit_changed_cb, zfsvfs); | |
524 | error = error ? error : dsl_prop_register(ds, | |
525 | "vscan", vscan_changed_cb, zfsvfs); | |
526 | if (error) | |
527 | goto unregister; | |
528 | ||
529 | /* | |
530 | * Invoke our callbacks to restore temporary mount options. | |
531 | */ | |
532 | if (do_readonly) | |
533 | readonly_changed_cb(zfsvfs, readonly); | |
534 | if (do_setuid) | |
535 | setuid_changed_cb(zfsvfs, setuid); | |
536 | if (do_exec) | |
537 | exec_changed_cb(zfsvfs, exec); | |
538 | if (do_devices) | |
539 | devices_changed_cb(zfsvfs, devices); | |
540 | if (do_xattr) | |
541 | xattr_changed_cb(zfsvfs, xattr); | |
542 | if (do_atime) | |
543 | atime_changed_cb(zfsvfs, atime); | |
544 | ||
545 | nbmand_changed_cb(zfsvfs, nbmand); | |
546 | ||
547 | return (0); | |
548 | ||
549 | unregister: | |
550 | /* | |
551 | * We may attempt to unregister some callbacks that are not | |
552 | * registered, but this is OK; it will simply return ENOMSG, | |
553 | * which we will ignore. | |
554 | */ | |
555 | (void) dsl_prop_unregister(ds, "atime", atime_changed_cb, zfsvfs); | |
556 | (void) dsl_prop_unregister(ds, "xattr", xattr_changed_cb, zfsvfs); | |
557 | (void) dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, zfsvfs); | |
558 | (void) dsl_prop_unregister(ds, "readonly", readonly_changed_cb, zfsvfs); | |
559 | (void) dsl_prop_unregister(ds, "devices", devices_changed_cb, zfsvfs); | |
560 | (void) dsl_prop_unregister(ds, "setuid", setuid_changed_cb, zfsvfs); | |
561 | (void) dsl_prop_unregister(ds, "exec", exec_changed_cb, zfsvfs); | |
562 | (void) dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, zfsvfs); | |
563 | (void) dsl_prop_unregister(ds, "aclmode", acl_mode_changed_cb, zfsvfs); | |
564 | (void) dsl_prop_unregister(ds, "aclinherit", acl_inherit_changed_cb, | |
565 | zfsvfs); | |
566 | (void) dsl_prop_unregister(ds, "vscan", vscan_changed_cb, zfsvfs); | |
567 | return (error); | |
568 | ||
569 | } | |
570 | ||
9babb374 BB |
571 | static void |
572 | uidacct(objset_t *os, boolean_t isgroup, uint64_t fuid, | |
573 | int64_t delta, dmu_tx_t *tx) | |
574 | { | |
575 | uint64_t used = 0; | |
576 | char buf[32]; | |
577 | int err; | |
578 | uint64_t obj = isgroup ? DMU_GROUPUSED_OBJECT : DMU_USERUSED_OBJECT; | |
579 | ||
580 | if (delta == 0) | |
581 | return; | |
582 | ||
583 | (void) snprintf(buf, sizeof (buf), "%llx", (longlong_t)fuid); | |
584 | err = zap_lookup(os, obj, buf, 8, 1, &used); | |
585 | ASSERT(err == 0 || err == ENOENT); | |
586 | /* no underflow/overflow */ | |
587 | ASSERT(delta > 0 || used >= -delta); | |
588 | ASSERT(delta < 0 || used + delta > used); | |
589 | used += delta; | |
590 | if (used == 0) | |
591 | err = zap_remove(os, obj, buf, tx); | |
592 | else | |
593 | err = zap_update(os, obj, buf, 8, 1, &used, tx); | |
594 | ASSERT(err == 0); | |
595 | } | |
596 | ||
597 | static void | |
598 | zfs_space_delta_cb(objset_t *os, dmu_object_type_t bonustype, | |
599 | void *oldbonus, void *newbonus, | |
600 | uint64_t oldused, uint64_t newused, dmu_tx_t *tx) | |
601 | { | |
602 | znode_phys_t *oldznp = oldbonus; | |
603 | znode_phys_t *newznp = newbonus; | |
604 | ||
605 | if (bonustype != DMU_OT_ZNODE) | |
606 | return; | |
607 | ||
608 | /* We charge 512 for the dnode (if it's allocated). */ | |
609 | if (oldznp->zp_gen != 0) | |
610 | oldused += DNODE_SIZE; | |
611 | if (newznp->zp_gen != 0) | |
612 | newused += DNODE_SIZE; | |
613 | ||
614 | if (oldznp->zp_uid == newznp->zp_uid) { | |
615 | uidacct(os, B_FALSE, oldznp->zp_uid, newused-oldused, tx); | |
616 | } else { | |
617 | uidacct(os, B_FALSE, oldznp->zp_uid, -oldused, tx); | |
618 | uidacct(os, B_FALSE, newznp->zp_uid, newused, tx); | |
619 | } | |
620 | ||
621 | if (oldznp->zp_gid == newznp->zp_gid) { | |
622 | uidacct(os, B_TRUE, oldznp->zp_gid, newused-oldused, tx); | |
623 | } else { | |
624 | uidacct(os, B_TRUE, oldznp->zp_gid, -oldused, tx); | |
625 | uidacct(os, B_TRUE, newznp->zp_gid, newused, tx); | |
626 | } | |
627 | } | |
628 | ||
629 | static void | |
630 | fuidstr_to_sid(zfsvfs_t *zfsvfs, const char *fuidstr, | |
631 | char *domainbuf, int buflen, uid_t *ridp) | |
632 | { | |
633 | extern uint64_t strtonum(const char *str, char **nptr); | |
634 | uint64_t fuid; | |
635 | const char *domain; | |
636 | ||
637 | fuid = strtonum(fuidstr, NULL); | |
638 | ||
639 | domain = zfs_fuid_find_by_idx(zfsvfs, FUID_INDEX(fuid)); | |
640 | if (domain) | |
641 | (void) strlcpy(domainbuf, domain, buflen); | |
642 | else | |
643 | domainbuf[0] = '\0'; | |
644 | *ridp = FUID_RID(fuid); | |
645 | } | |
646 | ||
647 | static uint64_t | |
648 | zfs_userquota_prop_to_obj(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type) | |
649 | { | |
650 | switch (type) { | |
651 | case ZFS_PROP_USERUSED: | |
652 | return (DMU_USERUSED_OBJECT); | |
653 | case ZFS_PROP_GROUPUSED: | |
654 | return (DMU_GROUPUSED_OBJECT); | |
655 | case ZFS_PROP_USERQUOTA: | |
656 | return (zfsvfs->z_userquota_obj); | |
657 | case ZFS_PROP_GROUPQUOTA: | |
658 | return (zfsvfs->z_groupquota_obj); | |
659 | } | |
660 | return (0); | |
661 | } | |
662 | ||
663 | int | |
664 | zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, | |
665 | uint64_t *cookiep, void *vbuf, uint64_t *bufsizep) | |
666 | { | |
667 | int error; | |
668 | zap_cursor_t zc; | |
669 | zap_attribute_t za; | |
670 | zfs_useracct_t *buf = vbuf; | |
671 | uint64_t obj; | |
672 | ||
673 | if (!dmu_objset_userspace_present(zfsvfs->z_os)) | |
674 | return (ENOTSUP); | |
675 | ||
676 | obj = zfs_userquota_prop_to_obj(zfsvfs, type); | |
677 | if (obj == 0) { | |
678 | *bufsizep = 0; | |
679 | return (0); | |
680 | } | |
681 | ||
682 | for (zap_cursor_init_serialized(&zc, zfsvfs->z_os, obj, *cookiep); | |
683 | (error = zap_cursor_retrieve(&zc, &za)) == 0; | |
684 | zap_cursor_advance(&zc)) { | |
685 | if ((uintptr_t)buf - (uintptr_t)vbuf + sizeof (zfs_useracct_t) > | |
686 | *bufsizep) | |
687 | break; | |
688 | ||
689 | fuidstr_to_sid(zfsvfs, za.za_name, | |
690 | buf->zu_domain, sizeof (buf->zu_domain), &buf->zu_rid); | |
691 | ||
692 | buf->zu_space = za.za_first_integer; | |
693 | buf++; | |
694 | } | |
695 | if (error == ENOENT) | |
696 | error = 0; | |
697 | ||
698 | ASSERT3U((uintptr_t)buf - (uintptr_t)vbuf, <=, *bufsizep); | |
699 | *bufsizep = (uintptr_t)buf - (uintptr_t)vbuf; | |
700 | *cookiep = zap_cursor_serialize(&zc); | |
701 | zap_cursor_fini(&zc); | |
702 | return (error); | |
703 | } | |
704 | ||
705 | /* | |
706 | * buf must be big enough (eg, 32 bytes) | |
707 | */ | |
708 | static int | |
709 | id_to_fuidstr(zfsvfs_t *zfsvfs, const char *domain, uid_t rid, | |
710 | char *buf, boolean_t addok) | |
711 | { | |
712 | uint64_t fuid; | |
713 | int domainid = 0; | |
714 | ||
715 | if (domain && domain[0]) { | |
716 | domainid = zfs_fuid_find_by_domain(zfsvfs, domain, NULL, addok); | |
717 | if (domainid == -1) | |
718 | return (ENOENT); | |
719 | } | |
720 | fuid = FUID_ENCODE(domainid, rid); | |
721 | (void) sprintf(buf, "%llx", (longlong_t)fuid); | |
722 | return (0); | |
723 | } | |
724 | ||
725 | int | |
726 | zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, | |
727 | const char *domain, uint64_t rid, uint64_t *valp) | |
728 | { | |
729 | char buf[32]; | |
730 | int err; | |
731 | uint64_t obj; | |
732 | ||
733 | *valp = 0; | |
734 | ||
735 | if (!dmu_objset_userspace_present(zfsvfs->z_os)) | |
736 | return (ENOTSUP); | |
737 | ||
738 | obj = zfs_userquota_prop_to_obj(zfsvfs, type); | |
739 | if (obj == 0) | |
740 | return (0); | |
741 | ||
742 | err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_FALSE); | |
743 | if (err) | |
744 | return (err); | |
745 | ||
746 | err = zap_lookup(zfsvfs->z_os, obj, buf, 8, 1, valp); | |
747 | if (err == ENOENT) | |
748 | err = 0; | |
749 | return (err); | |
750 | } | |
751 | ||
752 | int | |
753 | zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, | |
754 | const char *domain, uint64_t rid, uint64_t quota) | |
755 | { | |
756 | char buf[32]; | |
757 | int err; | |
758 | dmu_tx_t *tx; | |
759 | uint64_t *objp; | |
760 | boolean_t fuid_dirtied; | |
761 | ||
762 | if (type != ZFS_PROP_USERQUOTA && type != ZFS_PROP_GROUPQUOTA) | |
763 | return (EINVAL); | |
764 | ||
765 | if (zfsvfs->z_version < ZPL_VERSION_USERSPACE) | |
766 | return (ENOTSUP); | |
767 | ||
768 | objp = (type == ZFS_PROP_USERQUOTA) ? &zfsvfs->z_userquota_obj : | |
769 | &zfsvfs->z_groupquota_obj; | |
770 | ||
771 | err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_TRUE); | |
772 | if (err) | |
773 | return (err); | |
774 | fuid_dirtied = zfsvfs->z_fuid_dirty; | |
775 | ||
776 | tx = dmu_tx_create(zfsvfs->z_os); | |
777 | dmu_tx_hold_zap(tx, *objp ? *objp : DMU_NEW_OBJECT, B_TRUE, NULL); | |
778 | if (*objp == 0) { | |
779 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE, | |
780 | zfs_userquota_prop_prefixes[type]); | |
781 | } | |
782 | if (fuid_dirtied) | |
783 | zfs_fuid_txhold(zfsvfs, tx); | |
784 | err = dmu_tx_assign(tx, TXG_WAIT); | |
785 | if (err) { | |
786 | dmu_tx_abort(tx); | |
787 | return (err); | |
788 | } | |
789 | ||
790 | mutex_enter(&zfsvfs->z_lock); | |
791 | if (*objp == 0) { | |
792 | *objp = zap_create(zfsvfs->z_os, DMU_OT_USERGROUP_QUOTA, | |
793 | DMU_OT_NONE, 0, tx); | |
794 | VERIFY(0 == zap_add(zfsvfs->z_os, MASTER_NODE_OBJ, | |
795 | zfs_userquota_prop_prefixes[type], 8, 1, objp, tx)); | |
796 | } | |
797 | mutex_exit(&zfsvfs->z_lock); | |
798 | ||
799 | if (quota == 0) { | |
800 | err = zap_remove(zfsvfs->z_os, *objp, buf, tx); | |
801 | if (err == ENOENT) | |
802 | err = 0; | |
803 | } else { | |
804 | err = zap_update(zfsvfs->z_os, *objp, buf, 8, 1, "a, tx); | |
805 | } | |
806 | ASSERT(err == 0); | |
807 | if (fuid_dirtied) | |
808 | zfs_fuid_sync(zfsvfs, tx); | |
809 | dmu_tx_commit(tx); | |
810 | return (err); | |
811 | } | |
812 | ||
813 | boolean_t | |
814 | zfs_usergroup_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup, uint64_t fuid) | |
815 | { | |
816 | char buf[32]; | |
817 | uint64_t used, quota, usedobj, quotaobj; | |
818 | int err; | |
819 | ||
820 | usedobj = isgroup ? DMU_GROUPUSED_OBJECT : DMU_USERUSED_OBJECT; | |
821 | quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj; | |
822 | ||
823 | if (quotaobj == 0 || zfsvfs->z_replay) | |
824 | return (B_FALSE); | |
825 | ||
826 | (void) sprintf(buf, "%llx", (longlong_t)fuid); | |
827 | err = zap_lookup(zfsvfs->z_os, quotaobj, buf, 8, 1, "a); | |
828 | if (err != 0) | |
829 | return (B_FALSE); | |
830 | ||
831 | err = zap_lookup(zfsvfs->z_os, usedobj, buf, 8, 1, &used); | |
832 | if (err != 0) | |
833 | return (B_FALSE); | |
834 | return (used >= quota); | |
835 | } | |
836 | ||
837 | int | |
838 | zfsvfs_create(const char *osname, int mode, zfsvfs_t **zvp) | |
839 | { | |
840 | objset_t *os; | |
841 | zfsvfs_t *zfsvfs; | |
842 | uint64_t zval; | |
843 | int i, error; | |
844 | ||
845 | if (error = dsl_prop_get_integer(osname, "readonly", &zval, NULL)) | |
846 | return (error); | |
847 | if (zval) | |
848 | mode |= DS_MODE_READONLY; | |
849 | ||
850 | error = dmu_objset_open(osname, DMU_OST_ZFS, mode, &os); | |
851 | if (error == EROFS) { | |
852 | mode |= DS_MODE_READONLY; | |
853 | error = dmu_objset_open(osname, DMU_OST_ZFS, mode, &os); | |
854 | } | |
855 | if (error) | |
856 | return (error); | |
857 | ||
858 | /* | |
859 | * Initialize the zfs-specific filesystem structure. | |
860 | * Should probably make this a kmem cache, shuffle fields, | |
861 | * and just bzero up to z_hold_mtx[]. | |
862 | */ | |
863 | zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); | |
864 | zfsvfs->z_vfs = NULL; | |
865 | zfsvfs->z_parent = zfsvfs; | |
866 | zfsvfs->z_max_blksz = SPA_MAXBLOCKSIZE; | |
867 | zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE; | |
868 | zfsvfs->z_os = os; | |
869 | ||
870 | error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version); | |
871 | if (error) { | |
872 | goto out; | |
873 | } else if (zfsvfs->z_version > ZPL_VERSION) { | |
874 | (void) printf("Mismatched versions: File system " | |
875 | "is version %llu on-disk format, which is " | |
876 | "incompatible with this software version %lld!", | |
877 | (u_longlong_t)zfsvfs->z_version, ZPL_VERSION); | |
878 | error = ENOTSUP; | |
879 | goto out; | |
880 | } | |
881 | ||
882 | if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0) | |
883 | goto out; | |
884 | zfsvfs->z_norm = (int)zval; | |
885 | ||
886 | if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0) | |
887 | goto out; | |
888 | zfsvfs->z_utf8 = (zval != 0); | |
889 | ||
890 | if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0) | |
891 | goto out; | |
892 | zfsvfs->z_case = (uint_t)zval; | |
893 | ||
894 | /* | |
895 | * Fold case on file systems that are always or sometimes case | |
896 | * insensitive. | |
897 | */ | |
898 | if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE || | |
899 | zfsvfs->z_case == ZFS_CASE_MIXED) | |
900 | zfsvfs->z_norm |= U8_TEXTPREP_TOUPPER; | |
901 | ||
902 | zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); | |
903 | ||
904 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, | |
905 | &zfsvfs->z_root); | |
906 | if (error) | |
907 | goto out; | |
908 | ASSERT(zfsvfs->z_root != 0); | |
909 | ||
910 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1, | |
911 | &zfsvfs->z_unlinkedobj); | |
912 | if (error) | |
913 | goto out; | |
914 | ||
915 | error = zap_lookup(os, MASTER_NODE_OBJ, | |
916 | zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA], | |
917 | 8, 1, &zfsvfs->z_userquota_obj); | |
918 | if (error && error != ENOENT) | |
919 | goto out; | |
920 | ||
921 | error = zap_lookup(os, MASTER_NODE_OBJ, | |
922 | zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA], | |
923 | 8, 1, &zfsvfs->z_groupquota_obj); | |
924 | if (error && error != ENOENT) | |
925 | goto out; | |
926 | ||
927 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1, | |
928 | &zfsvfs->z_fuid_obj); | |
929 | if (error && error != ENOENT) | |
930 | goto out; | |
931 | ||
932 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1, | |
933 | &zfsvfs->z_shares_dir); | |
934 | if (error && error != ENOENT) | |
935 | goto out; | |
936 | ||
937 | mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); | |
938 | mutex_init(&zfsvfs->z_online_recv_lock, NULL, MUTEX_DEFAULT, NULL); | |
939 | mutex_init(&zfsvfs->z_lock, NULL, MUTEX_DEFAULT, NULL); | |
940 | list_create(&zfsvfs->z_all_znodes, sizeof (znode_t), | |
941 | offsetof(znode_t, z_link_node)); | |
942 | rrw_init(&zfsvfs->z_teardown_lock); | |
943 | rw_init(&zfsvfs->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL); | |
944 | rw_init(&zfsvfs->z_fuid_lock, NULL, RW_DEFAULT, NULL); | |
945 | for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) | |
946 | mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); | |
947 | ||
948 | *zvp = zfsvfs; | |
949 | return (0); | |
950 | ||
951 | out: | |
952 | dmu_objset_close(os); | |
953 | *zvp = NULL; | |
954 | kmem_free(zfsvfs, sizeof (zfsvfs_t)); | |
955 | return (error); | |
956 | } | |
957 | ||
34dc7c2f BB |
958 | static int |
959 | zfsvfs_setup(zfsvfs_t *zfsvfs, boolean_t mounting) | |
960 | { | |
34dc7c2f BB |
961 | int error; |
962 | ||
963 | error = zfs_register_callbacks(zfsvfs->z_vfs); | |
964 | if (error) | |
965 | return (error); | |
966 | ||
967 | /* | |
968 | * Set the objset user_ptr to track its zfsvfs. | |
969 | */ | |
970 | mutex_enter(&zfsvfs->z_os->os->os_user_ptr_lock); | |
971 | dmu_objset_set_user(zfsvfs->z_os, zfsvfs); | |
972 | mutex_exit(&zfsvfs->z_os->os->os_user_ptr_lock); | |
973 | ||
9babb374 BB |
974 | zfsvfs->z_log = zil_open(zfsvfs->z_os, zfs_get_data); |
975 | if (zil_disable) { | |
976 | zil_destroy(zfsvfs->z_log, 0); | |
977 | zfsvfs->z_log = NULL; | |
978 | } | |
979 | ||
34dc7c2f BB |
980 | /* |
981 | * If we are not mounting (ie: online recv), then we don't | |
982 | * have to worry about replaying the log as we blocked all | |
983 | * operations out since we closed the ZIL. | |
984 | */ | |
985 | if (mounting) { | |
b128c09f BB |
986 | boolean_t readonly; |
987 | ||
34dc7c2f BB |
988 | /* |
989 | * During replay we remove the read only flag to | |
990 | * allow replays to succeed. | |
991 | */ | |
992 | readonly = zfsvfs->z_vfs->vfs_flag & VFS_RDONLY; | |
fb5f0bc8 BB |
993 | if (readonly != 0) |
994 | zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; | |
995 | else | |
996 | zfs_unlinked_drain(zfsvfs); | |
34dc7c2f | 997 | |
9babb374 | 998 | if (zfsvfs->z_log) { |
fb5f0bc8 BB |
999 | /* |
1000 | * Parse and replay the intent log. | |
1001 | * | |
1002 | * Because of ziltest, this must be done after | |
1003 | * zfs_unlinked_drain(). (Further note: ziltest | |
1004 | * doesn't use readonly mounts, where | |
1005 | * zfs_unlinked_drain() isn't called.) This is because | |
1006 | * ziltest causes spa_sync() to think it's committed, | |
1007 | * but actually it is not, so the intent log contains | |
1008 | * many txg's worth of changes. | |
1009 | * | |
1010 | * In particular, if object N is in the unlinked set in | |
1011 | * the last txg to actually sync, then it could be | |
1012 | * actually freed in a later txg and then reallocated | |
1013 | * in a yet later txg. This would write a "create | |
1014 | * object N" record to the intent log. Normally, this | |
1015 | * would be fine because the spa_sync() would have | |
1016 | * written out the fact that object N is free, before | |
1017 | * we could write the "create object N" intent log | |
1018 | * record. | |
1019 | * | |
1020 | * But when we are in ziltest mode, we advance the "open | |
1021 | * txg" without actually spa_sync()-ing the changes to | |
1022 | * disk. So we would see that object N is still | |
1023 | * allocated and in the unlinked set, and there is an | |
1024 | * intent log record saying to allocate it. | |
1025 | */ | |
1026 | zfsvfs->z_replay = B_TRUE; | |
1027 | zil_replay(zfsvfs->z_os, zfsvfs, zfs_replay_vector); | |
1028 | zfsvfs->z_replay = B_FALSE; | |
1029 | } | |
34dc7c2f BB |
1030 | zfsvfs->z_vfs->vfs_flag |= readonly; /* restore readonly bit */ |
1031 | } | |
1032 | ||
34dc7c2f BB |
1033 | return (0); |
1034 | } | |
1035 | ||
9babb374 BB |
1036 | void |
1037 | zfsvfs_free(zfsvfs_t *zfsvfs) | |
34dc7c2f | 1038 | { |
9babb374 BB |
1039 | int i; |
1040 | extern krwlock_t zfsvfs_lock; /* in zfs_znode.c */ | |
1041 | ||
1042 | /* | |
1043 | * This is a barrier to prevent the filesystem from going away in | |
1044 | * zfs_znode_move() until we can safely ensure that the filesystem is | |
1045 | * not unmounted. We consider the filesystem valid before the barrier | |
1046 | * and invalid after the barrier. | |
1047 | */ | |
1048 | rw_enter(&zfsvfs_lock, RW_READER); | |
1049 | rw_exit(&zfsvfs_lock); | |
1050 | ||
1051 | zfs_fuid_destroy(zfsvfs); | |
1052 | ||
34dc7c2f BB |
1053 | mutex_destroy(&zfsvfs->z_znodes_lock); |
1054 | mutex_destroy(&zfsvfs->z_online_recv_lock); | |
9babb374 | 1055 | mutex_destroy(&zfsvfs->z_lock); |
34dc7c2f BB |
1056 | list_destroy(&zfsvfs->z_all_znodes); |
1057 | rrw_destroy(&zfsvfs->z_teardown_lock); | |
1058 | rw_destroy(&zfsvfs->z_teardown_inactive_lock); | |
1059 | rw_destroy(&zfsvfs->z_fuid_lock); | |
9babb374 BB |
1060 | for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) |
1061 | mutex_destroy(&zfsvfs->z_hold_mtx[i]); | |
34dc7c2f BB |
1062 | kmem_free(zfsvfs, sizeof (zfsvfs_t)); |
1063 | } | |
1064 | ||
9babb374 BB |
1065 | static void |
1066 | zfs_set_fuid_feature(zfsvfs_t *zfsvfs) | |
1067 | { | |
1068 | zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); | |
1069 | if (zfsvfs->z_use_fuids && zfsvfs->z_vfs) { | |
1070 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_XVATTR); | |
1071 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_SYSATTR_VIEWS); | |
1072 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACEMASKONACCESS); | |
1073 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACLONCREATE); | |
1074 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACCESS_FILTER); | |
1075 | } | |
1076 | } | |
1077 | ||
34dc7c2f | 1078 | static int |
b128c09f | 1079 | zfs_domount(vfs_t *vfsp, char *osname) |
34dc7c2f BB |
1080 | { |
1081 | dev_t mount_dev; | |
9babb374 | 1082 | uint64_t recordsize, fsid_guid; |
34dc7c2f | 1083 | int error = 0; |
34dc7c2f | 1084 | zfsvfs_t *zfsvfs; |
34dc7c2f BB |
1085 | |
1086 | ASSERT(vfsp); | |
1087 | ASSERT(osname); | |
1088 | ||
9babb374 BB |
1089 | error = zfsvfs_create(osname, DS_MODE_OWNER, &zfsvfs); |
1090 | if (error) | |
1091 | return (error); | |
34dc7c2f | 1092 | zfsvfs->z_vfs = vfsp; |
34dc7c2f BB |
1093 | |
1094 | /* Initialize the generic filesystem structure. */ | |
1095 | vfsp->vfs_bcount = 0; | |
1096 | vfsp->vfs_data = NULL; | |
1097 | ||
1098 | if (zfs_create_unique_device(&mount_dev) == -1) { | |
1099 | error = ENODEV; | |
1100 | goto out; | |
1101 | } | |
1102 | ASSERT(vfs_devismounted(mount_dev) == 0); | |
1103 | ||
1104 | if (error = dsl_prop_get_integer(osname, "recordsize", &recordsize, | |
1105 | NULL)) | |
1106 | goto out; | |
1107 | ||
1108 | vfsp->vfs_dev = mount_dev; | |
1109 | vfsp->vfs_fstype = zfsfstype; | |
1110 | vfsp->vfs_bsize = recordsize; | |
1111 | vfsp->vfs_flag |= VFS_NOTRUNC; | |
1112 | vfsp->vfs_data = zfsvfs; | |
1113 | ||
9babb374 BB |
1114 | /* |
1115 | * The fsid is 64 bits, composed of an 8-bit fs type, which | |
1116 | * separates our fsid from any other filesystem types, and a | |
1117 | * 56-bit objset unique ID. The objset unique ID is unique to | |
1118 | * all objsets open on this system, provided by unique_create(). | |
1119 | * The 8-bit fs type must be put in the low bits of fsid[1] | |
1120 | * because that's where other Solaris filesystems put it. | |
1121 | */ | |
1122 | fsid_guid = dmu_objset_fsid_guid(zfsvfs->z_os); | |
1123 | ASSERT((fsid_guid & ~((1ULL<<56)-1)) == 0); | |
1124 | vfsp->vfs_fsid.val[0] = fsid_guid; | |
1125 | vfsp->vfs_fsid.val[1] = ((fsid_guid>>32) << 8) | | |
1126 | zfsfstype & 0xFF; | |
34dc7c2f BB |
1127 | |
1128 | /* | |
1129 | * Set features for file system. | |
1130 | */ | |
9babb374 | 1131 | zfs_set_fuid_feature(zfsvfs); |
34dc7c2f BB |
1132 | if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE) { |
1133 | vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); | |
1134 | vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); | |
1135 | vfs_set_feature(vfsp, VFSFT_NOCASESENSITIVE); | |
1136 | } else if (zfsvfs->z_case == ZFS_CASE_MIXED) { | |
1137 | vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); | |
1138 | vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); | |
1139 | } | |
1140 | ||
1141 | if (dmu_objset_is_snapshot(zfsvfs->z_os)) { | |
1142 | uint64_t pval; | |
1143 | ||
34dc7c2f BB |
1144 | atime_changed_cb(zfsvfs, B_FALSE); |
1145 | readonly_changed_cb(zfsvfs, B_TRUE); | |
1146 | if (error = dsl_prop_get_integer(osname, "xattr", &pval, NULL)) | |
1147 | goto out; | |
1148 | xattr_changed_cb(zfsvfs, pval); | |
1149 | zfsvfs->z_issnap = B_TRUE; | |
9babb374 BB |
1150 | |
1151 | mutex_enter(&zfsvfs->z_os->os->os_user_ptr_lock); | |
1152 | dmu_objset_set_user(zfsvfs->z_os, zfsvfs); | |
1153 | mutex_exit(&zfsvfs->z_os->os->os_user_ptr_lock); | |
34dc7c2f BB |
1154 | } else { |
1155 | error = zfsvfs_setup(zfsvfs, B_TRUE); | |
1156 | } | |
1157 | ||
1158 | if (!zfsvfs->z_issnap) | |
1159 | zfsctl_create(zfsvfs); | |
1160 | out: | |
1161 | if (error) { | |
9babb374 BB |
1162 | dmu_objset_close(zfsvfs->z_os); |
1163 | zfsvfs_free(zfsvfs); | |
34dc7c2f BB |
1164 | } else { |
1165 | atomic_add_32(&zfs_active_fs_count, 1); | |
1166 | } | |
1167 | ||
1168 | return (error); | |
1169 | } | |
1170 | ||
1171 | void | |
1172 | zfs_unregister_callbacks(zfsvfs_t *zfsvfs) | |
1173 | { | |
1174 | objset_t *os = zfsvfs->z_os; | |
1175 | struct dsl_dataset *ds; | |
1176 | ||
1177 | /* | |
1178 | * Unregister properties. | |
1179 | */ | |
1180 | if (!dmu_objset_is_snapshot(os)) { | |
1181 | ds = dmu_objset_ds(os); | |
1182 | VERIFY(dsl_prop_unregister(ds, "atime", atime_changed_cb, | |
1183 | zfsvfs) == 0); | |
1184 | ||
1185 | VERIFY(dsl_prop_unregister(ds, "xattr", xattr_changed_cb, | |
1186 | zfsvfs) == 0); | |
1187 | ||
1188 | VERIFY(dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, | |
1189 | zfsvfs) == 0); | |
1190 | ||
1191 | VERIFY(dsl_prop_unregister(ds, "readonly", readonly_changed_cb, | |
1192 | zfsvfs) == 0); | |
1193 | ||
1194 | VERIFY(dsl_prop_unregister(ds, "devices", devices_changed_cb, | |
1195 | zfsvfs) == 0); | |
1196 | ||
1197 | VERIFY(dsl_prop_unregister(ds, "setuid", setuid_changed_cb, | |
1198 | zfsvfs) == 0); | |
1199 | ||
1200 | VERIFY(dsl_prop_unregister(ds, "exec", exec_changed_cb, | |
1201 | zfsvfs) == 0); | |
1202 | ||
1203 | VERIFY(dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, | |
1204 | zfsvfs) == 0); | |
1205 | ||
1206 | VERIFY(dsl_prop_unregister(ds, "aclmode", acl_mode_changed_cb, | |
1207 | zfsvfs) == 0); | |
1208 | ||
1209 | VERIFY(dsl_prop_unregister(ds, "aclinherit", | |
1210 | acl_inherit_changed_cb, zfsvfs) == 0); | |
1211 | ||
1212 | VERIFY(dsl_prop_unregister(ds, "vscan", | |
1213 | vscan_changed_cb, zfsvfs) == 0); | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | /* | |
1218 | * Convert a decimal digit string to a uint64_t integer. | |
1219 | */ | |
1220 | static int | |
1221 | str_to_uint64(char *str, uint64_t *objnum) | |
1222 | { | |
1223 | uint64_t num = 0; | |
1224 | ||
1225 | while (*str) { | |
1226 | if (*str < '0' || *str > '9') | |
1227 | return (EINVAL); | |
1228 | ||
1229 | num = num*10 + *str++ - '0'; | |
1230 | } | |
1231 | ||
1232 | *objnum = num; | |
1233 | return (0); | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * The boot path passed from the boot loader is in the form of | |
1238 | * "rootpool-name/root-filesystem-object-number'. Convert this | |
1239 | * string to a dataset name: "rootpool-name/root-filesystem-name". | |
1240 | */ | |
1241 | static int | |
1242 | zfs_parse_bootfs(char *bpath, char *outpath) | |
1243 | { | |
1244 | char *slashp; | |
1245 | uint64_t objnum; | |
1246 | int error; | |
1247 | ||
1248 | if (*bpath == 0 || *bpath == '/') | |
1249 | return (EINVAL); | |
1250 | ||
b128c09f BB |
1251 | (void) strcpy(outpath, bpath); |
1252 | ||
34dc7c2f BB |
1253 | slashp = strchr(bpath, '/'); |
1254 | ||
1255 | /* if no '/', just return the pool name */ | |
1256 | if (slashp == NULL) { | |
34dc7c2f BB |
1257 | return (0); |
1258 | } | |
1259 | ||
b128c09f BB |
1260 | /* if not a number, just return the root dataset name */ |
1261 | if (str_to_uint64(slashp+1, &objnum)) { | |
1262 | return (0); | |
1263 | } | |
34dc7c2f BB |
1264 | |
1265 | *slashp = '\0'; | |
1266 | error = dsl_dsobj_to_dsname(bpath, objnum, outpath); | |
1267 | *slashp = '/'; | |
1268 | ||
1269 | return (error); | |
1270 | } | |
1271 | ||
1272 | static int | |
1273 | zfs_mountroot(vfs_t *vfsp, enum whymountroot why) | |
1274 | { | |
1275 | int error = 0; | |
1276 | static int zfsrootdone = 0; | |
1277 | zfsvfs_t *zfsvfs = NULL; | |
1278 | znode_t *zp = NULL; | |
1279 | vnode_t *vp = NULL; | |
1280 | char *zfs_bootfs; | |
b128c09f | 1281 | char *zfs_devid; |
34dc7c2f BB |
1282 | |
1283 | ASSERT(vfsp); | |
1284 | ||
1285 | /* | |
1286 | * The filesystem that we mount as root is defined in the | |
1287 | * boot property "zfs-bootfs" with a format of | |
1288 | * "poolname/root-dataset-objnum". | |
1289 | */ | |
1290 | if (why == ROOT_INIT) { | |
1291 | if (zfsrootdone++) | |
1292 | return (EBUSY); | |
1293 | /* | |
1294 | * the process of doing a spa_load will require the | |
1295 | * clock to be set before we could (for example) do | |
1296 | * something better by looking at the timestamp on | |
1297 | * an uberblock, so just set it to -1. | |
1298 | */ | |
1299 | clkset(-1); | |
1300 | ||
b128c09f BB |
1301 | if ((zfs_bootfs = spa_get_bootprop("zfs-bootfs")) == NULL) { |
1302 | cmn_err(CE_NOTE, "spa_get_bootfs: can not get " | |
1303 | "bootfs name"); | |
34dc7c2f BB |
1304 | return (EINVAL); |
1305 | } | |
b128c09f BB |
1306 | zfs_devid = spa_get_bootprop("diskdevid"); |
1307 | error = spa_import_rootpool(rootfs.bo_name, zfs_devid); | |
1308 | if (zfs_devid) | |
1309 | spa_free_bootprop(zfs_devid); | |
1310 | if (error) { | |
1311 | spa_free_bootprop(zfs_bootfs); | |
1312 | cmn_err(CE_NOTE, "spa_import_rootpool: error %d", | |
34dc7c2f BB |
1313 | error); |
1314 | return (error); | |
1315 | } | |
34dc7c2f | 1316 | if (error = zfs_parse_bootfs(zfs_bootfs, rootfs.bo_name)) { |
b128c09f BB |
1317 | spa_free_bootprop(zfs_bootfs); |
1318 | cmn_err(CE_NOTE, "zfs_parse_bootfs: error %d", | |
34dc7c2f BB |
1319 | error); |
1320 | return (error); | |
1321 | } | |
1322 | ||
b128c09f | 1323 | spa_free_bootprop(zfs_bootfs); |
34dc7c2f BB |
1324 | |
1325 | if (error = vfs_lock(vfsp)) | |
1326 | return (error); | |
1327 | ||
b128c09f BB |
1328 | if (error = zfs_domount(vfsp, rootfs.bo_name)) { |
1329 | cmn_err(CE_NOTE, "zfs_domount: error %d", error); | |
34dc7c2f BB |
1330 | goto out; |
1331 | } | |
1332 | ||
1333 | zfsvfs = (zfsvfs_t *)vfsp->vfs_data; | |
1334 | ASSERT(zfsvfs); | |
1335 | if (error = zfs_zget(zfsvfs, zfsvfs->z_root, &zp)) { | |
b128c09f | 1336 | cmn_err(CE_NOTE, "zfs_zget: error %d", error); |
34dc7c2f BB |
1337 | goto out; |
1338 | } | |
1339 | ||
1340 | vp = ZTOV(zp); | |
1341 | mutex_enter(&vp->v_lock); | |
1342 | vp->v_flag |= VROOT; | |
1343 | mutex_exit(&vp->v_lock); | |
1344 | rootvp = vp; | |
1345 | ||
1346 | /* | |
b128c09f | 1347 | * Leave rootvp held. The root file system is never unmounted. |
34dc7c2f | 1348 | */ |
34dc7c2f BB |
1349 | |
1350 | vfs_add((struct vnode *)0, vfsp, | |
1351 | (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); | |
1352 | out: | |
1353 | vfs_unlock(vfsp); | |
1354 | return (error); | |
1355 | } else if (why == ROOT_REMOUNT) { | |
1356 | readonly_changed_cb(vfsp->vfs_data, B_FALSE); | |
1357 | vfsp->vfs_flag |= VFS_REMOUNT; | |
1358 | ||
1359 | /* refresh mount options */ | |
1360 | zfs_unregister_callbacks(vfsp->vfs_data); | |
1361 | return (zfs_register_callbacks(vfsp)); | |
1362 | ||
1363 | } else if (why == ROOT_UNMOUNT) { | |
1364 | zfs_unregister_callbacks((zfsvfs_t *)vfsp->vfs_data); | |
1365 | (void) zfs_sync(vfsp, 0, 0); | |
1366 | return (0); | |
1367 | } | |
1368 | ||
1369 | /* | |
1370 | * if "why" is equal to anything else other than ROOT_INIT, | |
1371 | * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it. | |
1372 | */ | |
1373 | return (ENOTSUP); | |
1374 | } | |
1375 | ||
1376 | /*ARGSUSED*/ | |
1377 | static int | |
1378 | zfs_mount(vfs_t *vfsp, vnode_t *mvp, struct mounta *uap, cred_t *cr) | |
1379 | { | |
1380 | char *osname; | |
1381 | pathname_t spn; | |
1382 | int error = 0; | |
1383 | uio_seg_t fromspace = (uap->flags & MS_SYSSPACE) ? | |
1384 | UIO_SYSSPACE : UIO_USERSPACE; | |
1385 | int canwrite; | |
1386 | ||
1387 | if (mvp->v_type != VDIR) | |
1388 | return (ENOTDIR); | |
1389 | ||
1390 | mutex_enter(&mvp->v_lock); | |
1391 | if ((uap->flags & MS_REMOUNT) == 0 && | |
1392 | (uap->flags & MS_OVERLAY) == 0 && | |
1393 | (mvp->v_count != 1 || (mvp->v_flag & VROOT))) { | |
1394 | mutex_exit(&mvp->v_lock); | |
1395 | return (EBUSY); | |
1396 | } | |
1397 | mutex_exit(&mvp->v_lock); | |
1398 | ||
1399 | /* | |
1400 | * ZFS does not support passing unparsed data in via MS_DATA. | |
1401 | * Users should use the MS_OPTIONSTR interface; this means | |
1402 | * that all option parsing is already done and the options struct | |
1403 | * can be interrogated. | |
1404 | */ | |
1405 | if ((uap->flags & MS_DATA) && uap->datalen > 0) | |
1406 | return (EINVAL); | |
1407 | ||
1408 | /* | |
1409 | * Get the objset name (the "special" mount argument). | |
1410 | */ | |
1411 | if (error = pn_get(uap->spec, fromspace, &spn)) | |
1412 | return (error); | |
1413 | ||
1414 | osname = spn.pn_path; | |
1415 | ||
1416 | /* | |
1417 | * Check for mount privilege? | |
1418 | * | |
1419 | * If we don't have privilege then see if | |
1420 | * we have local permission to allow it | |
1421 | */ | |
1422 | error = secpolicy_fs_mount(cr, mvp, vfsp); | |
1423 | if (error) { | |
1424 | error = dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr); | |
1425 | if (error == 0) { | |
1426 | vattr_t vattr; | |
1427 | ||
1428 | /* | |
1429 | * Make sure user is the owner of the mount point | |
1430 | * or has sufficient privileges. | |
1431 | */ | |
1432 | ||
1433 | vattr.va_mask = AT_UID; | |
1434 | ||
1435 | if (error = VOP_GETATTR(mvp, &vattr, 0, cr, NULL)) { | |
1436 | goto out; | |
1437 | } | |
1438 | ||
1439 | if (secpolicy_vnode_owner(cr, vattr.va_uid) != 0 && | |
1440 | VOP_ACCESS(mvp, VWRITE, 0, cr, NULL) != 0) { | |
1441 | error = EPERM; | |
1442 | goto out; | |
1443 | } | |
1444 | ||
1445 | secpolicy_fs_mount_clearopts(cr, vfsp); | |
1446 | } else { | |
1447 | goto out; | |
1448 | } | |
1449 | } | |
1450 | ||
1451 | /* | |
1452 | * Refuse to mount a filesystem if we are in a local zone and the | |
1453 | * dataset is not visible. | |
1454 | */ | |
1455 | if (!INGLOBALZONE(curproc) && | |
1456 | (!zone_dataset_visible(osname, &canwrite) || !canwrite)) { | |
1457 | error = EPERM; | |
1458 | goto out; | |
1459 | } | |
1460 | ||
1461 | /* | |
1462 | * When doing a remount, we simply refresh our temporary properties | |
1463 | * according to those options set in the current VFS options. | |
1464 | */ | |
1465 | if (uap->flags & MS_REMOUNT) { | |
1466 | /* refresh mount options */ | |
1467 | zfs_unregister_callbacks(vfsp->vfs_data); | |
1468 | error = zfs_register_callbacks(vfsp); | |
1469 | goto out; | |
1470 | } | |
1471 | ||
b128c09f | 1472 | error = zfs_domount(vfsp, osname); |
34dc7c2f | 1473 | |
9babb374 BB |
1474 | /* |
1475 | * Add an extra VFS_HOLD on our parent vfs so that it can't | |
1476 | * disappear due to a forced unmount. | |
1477 | */ | |
1478 | if (error == 0 && ((zfsvfs_t *)vfsp->vfs_data)->z_issnap) | |
1479 | VFS_HOLD(mvp->v_vfsp); | |
1480 | ||
34dc7c2f BB |
1481 | out: |
1482 | pn_free(&spn); | |
1483 | return (error); | |
1484 | } | |
1485 | ||
1486 | static int | |
1487 | zfs_statvfs(vfs_t *vfsp, struct statvfs64 *statp) | |
1488 | { | |
1489 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1490 | dev32_t d32; | |
1491 | uint64_t refdbytes, availbytes, usedobjs, availobjs; | |
1492 | ||
1493 | ZFS_ENTER(zfsvfs); | |
1494 | ||
1495 | dmu_objset_space(zfsvfs->z_os, | |
1496 | &refdbytes, &availbytes, &usedobjs, &availobjs); | |
1497 | ||
1498 | /* | |
1499 | * The underlying storage pool actually uses multiple block sizes. | |
1500 | * We report the fragsize as the smallest block size we support, | |
1501 | * and we report our blocksize as the filesystem's maximum blocksize. | |
1502 | */ | |
1503 | statp->f_frsize = 1UL << SPA_MINBLOCKSHIFT; | |
1504 | statp->f_bsize = zfsvfs->z_max_blksz; | |
1505 | ||
1506 | /* | |
1507 | * The following report "total" blocks of various kinds in the | |
1508 | * file system, but reported in terms of f_frsize - the | |
1509 | * "fragment" size. | |
1510 | */ | |
1511 | ||
1512 | statp->f_blocks = (refdbytes + availbytes) >> SPA_MINBLOCKSHIFT; | |
1513 | statp->f_bfree = availbytes >> SPA_MINBLOCKSHIFT; | |
1514 | statp->f_bavail = statp->f_bfree; /* no root reservation */ | |
1515 | ||
1516 | /* | |
1517 | * statvfs() should really be called statufs(), because it assumes | |
1518 | * static metadata. ZFS doesn't preallocate files, so the best | |
1519 | * we can do is report the max that could possibly fit in f_files, | |
1520 | * and that minus the number actually used in f_ffree. | |
1521 | * For f_ffree, report the smaller of the number of object available | |
1522 | * and the number of blocks (each object will take at least a block). | |
1523 | */ | |
1524 | statp->f_ffree = MIN(availobjs, statp->f_bfree); | |
1525 | statp->f_favail = statp->f_ffree; /* no "root reservation" */ | |
1526 | statp->f_files = statp->f_ffree + usedobjs; | |
1527 | ||
1528 | (void) cmpldev(&d32, vfsp->vfs_dev); | |
1529 | statp->f_fsid = d32; | |
1530 | ||
1531 | /* | |
1532 | * We're a zfs filesystem. | |
1533 | */ | |
1534 | (void) strcpy(statp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name); | |
1535 | ||
1536 | statp->f_flag = vf_to_stf(vfsp->vfs_flag); | |
1537 | ||
1538 | statp->f_namemax = ZFS_MAXNAMELEN; | |
1539 | ||
1540 | /* | |
1541 | * We have all of 32 characters to stuff a string here. | |
1542 | * Is there anything useful we could/should provide? | |
1543 | */ | |
1544 | bzero(statp->f_fstr, sizeof (statp->f_fstr)); | |
1545 | ||
1546 | ZFS_EXIT(zfsvfs); | |
1547 | return (0); | |
1548 | } | |
1549 | ||
1550 | static int | |
1551 | zfs_root(vfs_t *vfsp, vnode_t **vpp) | |
1552 | { | |
1553 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1554 | znode_t *rootzp; | |
1555 | int error; | |
1556 | ||
1557 | ZFS_ENTER(zfsvfs); | |
1558 | ||
1559 | error = zfs_zget(zfsvfs, zfsvfs->z_root, &rootzp); | |
1560 | if (error == 0) | |
1561 | *vpp = ZTOV(rootzp); | |
1562 | ||
1563 | ZFS_EXIT(zfsvfs); | |
1564 | return (error); | |
1565 | } | |
1566 | ||
1567 | /* | |
1568 | * Teardown the zfsvfs::z_os. | |
1569 | * | |
1570 | * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock' | |
1571 | * and 'z_teardown_inactive_lock' held. | |
1572 | */ | |
1573 | static int | |
1574 | zfsvfs_teardown(zfsvfs_t *zfsvfs, boolean_t unmounting) | |
1575 | { | |
1576 | znode_t *zp; | |
1577 | ||
1578 | rrw_enter(&zfsvfs->z_teardown_lock, RW_WRITER, FTAG); | |
1579 | ||
1580 | if (!unmounting) { | |
1581 | /* | |
1582 | * We purge the parent filesystem's vfsp as the parent | |
1583 | * filesystem and all of its snapshots have their vnode's | |
1584 | * v_vfsp set to the parent's filesystem's vfsp. Note, | |
1585 | * 'z_parent' is self referential for non-snapshots. | |
1586 | */ | |
1587 | (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); | |
1588 | } | |
1589 | ||
1590 | /* | |
1591 | * Close the zil. NB: Can't close the zil while zfs_inactive | |
1592 | * threads are blocked as zil_close can call zfs_inactive. | |
1593 | */ | |
1594 | if (zfsvfs->z_log) { | |
1595 | zil_close(zfsvfs->z_log); | |
1596 | zfsvfs->z_log = NULL; | |
1597 | } | |
1598 | ||
1599 | rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_WRITER); | |
1600 | ||
1601 | /* | |
1602 | * If we are not unmounting (ie: online recv) and someone already | |
1603 | * unmounted this file system while we were doing the switcheroo, | |
1604 | * or a reopen of z_os failed then just bail out now. | |
1605 | */ | |
1606 | if (!unmounting && (zfsvfs->z_unmounted || zfsvfs->z_os == NULL)) { | |
1607 | rw_exit(&zfsvfs->z_teardown_inactive_lock); | |
1608 | rrw_exit(&zfsvfs->z_teardown_lock, FTAG); | |
1609 | return (EIO); | |
1610 | } | |
1611 | ||
1612 | /* | |
1613 | * At this point there are no vops active, and any new vops will | |
1614 | * fail with EIO since we have z_teardown_lock for writer (only | |
1615 | * relavent for forced unmount). | |
1616 | * | |
1617 | * Release all holds on dbufs. | |
1618 | */ | |
1619 | mutex_enter(&zfsvfs->z_znodes_lock); | |
1620 | for (zp = list_head(&zfsvfs->z_all_znodes); zp != NULL; | |
1621 | zp = list_next(&zfsvfs->z_all_znodes, zp)) | |
1622 | if (zp->z_dbuf) { | |
1623 | ASSERT(ZTOV(zp)->v_count > 0); | |
1624 | zfs_znode_dmu_fini(zp); | |
1625 | } | |
1626 | mutex_exit(&zfsvfs->z_znodes_lock); | |
1627 | ||
1628 | /* | |
1629 | * If we are unmounting, set the unmounted flag and let new vops | |
1630 | * unblock. zfs_inactive will have the unmounted behavior, and all | |
1631 | * other vops will fail with EIO. | |
1632 | */ | |
1633 | if (unmounting) { | |
1634 | zfsvfs->z_unmounted = B_TRUE; | |
1635 | rrw_exit(&zfsvfs->z_teardown_lock, FTAG); | |
1636 | rw_exit(&zfsvfs->z_teardown_inactive_lock); | |
1637 | } | |
1638 | ||
1639 | /* | |
1640 | * z_os will be NULL if there was an error in attempting to reopen | |
1641 | * zfsvfs, so just return as the properties had already been | |
1642 | * unregistered and cached data had been evicted before. | |
1643 | */ | |
1644 | if (zfsvfs->z_os == NULL) | |
1645 | return (0); | |
1646 | ||
1647 | /* | |
1648 | * Unregister properties. | |
1649 | */ | |
1650 | zfs_unregister_callbacks(zfsvfs); | |
1651 | ||
1652 | /* | |
1653 | * Evict cached data | |
1654 | */ | |
1655 | if (dmu_objset_evict_dbufs(zfsvfs->z_os)) { | |
1656 | txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0); | |
1657 | (void) dmu_objset_evict_dbufs(zfsvfs->z_os); | |
1658 | } | |
1659 | ||
1660 | return (0); | |
1661 | } | |
1662 | ||
1663 | /*ARGSUSED*/ | |
1664 | static int | |
1665 | zfs_umount(vfs_t *vfsp, int fflag, cred_t *cr) | |
1666 | { | |
1667 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1668 | objset_t *os; | |
1669 | int ret; | |
1670 | ||
1671 | ret = secpolicy_fs_unmount(cr, vfsp); | |
1672 | if (ret) { | |
1673 | ret = dsl_deleg_access((char *)refstr_value(vfsp->vfs_resource), | |
1674 | ZFS_DELEG_PERM_MOUNT, cr); | |
1675 | if (ret) | |
1676 | return (ret); | |
1677 | } | |
1678 | ||
1679 | /* | |
1680 | * We purge the parent filesystem's vfsp as the parent filesystem | |
1681 | * and all of its snapshots have their vnode's v_vfsp set to the | |
1682 | * parent's filesystem's vfsp. Note, 'z_parent' is self | |
1683 | * referential for non-snapshots. | |
1684 | */ | |
1685 | (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); | |
1686 | ||
1687 | /* | |
1688 | * Unmount any snapshots mounted under .zfs before unmounting the | |
1689 | * dataset itself. | |
1690 | */ | |
1691 | if (zfsvfs->z_ctldir != NULL && | |
1692 | (ret = zfsctl_umount_snapshots(vfsp, fflag, cr)) != 0) { | |
1693 | return (ret); | |
1694 | } | |
1695 | ||
1696 | if (!(fflag & MS_FORCE)) { | |
1697 | /* | |
1698 | * Check the number of active vnodes in the file system. | |
1699 | * Our count is maintained in the vfs structure, but the | |
1700 | * number is off by 1 to indicate a hold on the vfs | |
1701 | * structure itself. | |
1702 | * | |
1703 | * The '.zfs' directory maintains a reference of its | |
1704 | * own, and any active references underneath are | |
1705 | * reflected in the vnode count. | |
1706 | */ | |
1707 | if (zfsvfs->z_ctldir == NULL) { | |
1708 | if (vfsp->vfs_count > 1) | |
1709 | return (EBUSY); | |
1710 | } else { | |
1711 | if (vfsp->vfs_count > 2 || | |
1712 | zfsvfs->z_ctldir->v_count > 1) | |
1713 | return (EBUSY); | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | vfsp->vfs_flag |= VFS_UNMOUNTED; | |
1718 | ||
1719 | VERIFY(zfsvfs_teardown(zfsvfs, B_TRUE) == 0); | |
1720 | os = zfsvfs->z_os; | |
1721 | ||
1722 | /* | |
1723 | * z_os will be NULL if there was an error in | |
1724 | * attempting to reopen zfsvfs. | |
1725 | */ | |
1726 | if (os != NULL) { | |
1727 | /* | |
1728 | * Unset the objset user_ptr. | |
1729 | */ | |
1730 | mutex_enter(&os->os->os_user_ptr_lock); | |
1731 | dmu_objset_set_user(os, NULL); | |
1732 | mutex_exit(&os->os->os_user_ptr_lock); | |
1733 | ||
1734 | /* | |
b128c09f | 1735 | * Finally release the objset |
34dc7c2f BB |
1736 | */ |
1737 | dmu_objset_close(os); | |
1738 | } | |
1739 | ||
1740 | /* | |
1741 | * We can now safely destroy the '.zfs' directory node. | |
1742 | */ | |
1743 | if (zfsvfs->z_ctldir != NULL) | |
1744 | zfsctl_destroy(zfsvfs); | |
1745 | ||
1746 | return (0); | |
1747 | } | |
1748 | ||
1749 | static int | |
1750 | zfs_vget(vfs_t *vfsp, vnode_t **vpp, fid_t *fidp) | |
1751 | { | |
1752 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1753 | znode_t *zp; | |
1754 | uint64_t object = 0; | |
1755 | uint64_t fid_gen = 0; | |
1756 | uint64_t gen_mask; | |
1757 | uint64_t zp_gen; | |
1758 | int i, err; | |
1759 | ||
1760 | *vpp = NULL; | |
1761 | ||
1762 | ZFS_ENTER(zfsvfs); | |
1763 | ||
1764 | if (fidp->fid_len == LONG_FID_LEN) { | |
1765 | zfid_long_t *zlfid = (zfid_long_t *)fidp; | |
1766 | uint64_t objsetid = 0; | |
1767 | uint64_t setgen = 0; | |
1768 | ||
1769 | for (i = 0; i < sizeof (zlfid->zf_setid); i++) | |
1770 | objsetid |= ((uint64_t)zlfid->zf_setid[i]) << (8 * i); | |
1771 | ||
1772 | for (i = 0; i < sizeof (zlfid->zf_setgen); i++) | |
1773 | setgen |= ((uint64_t)zlfid->zf_setgen[i]) << (8 * i); | |
1774 | ||
1775 | ZFS_EXIT(zfsvfs); | |
1776 | ||
1777 | err = zfsctl_lookup_objset(vfsp, objsetid, &zfsvfs); | |
1778 | if (err) | |
1779 | return (EINVAL); | |
1780 | ZFS_ENTER(zfsvfs); | |
1781 | } | |
1782 | ||
1783 | if (fidp->fid_len == SHORT_FID_LEN || fidp->fid_len == LONG_FID_LEN) { | |
1784 | zfid_short_t *zfid = (zfid_short_t *)fidp; | |
1785 | ||
1786 | for (i = 0; i < sizeof (zfid->zf_object); i++) | |
1787 | object |= ((uint64_t)zfid->zf_object[i]) << (8 * i); | |
1788 | ||
1789 | for (i = 0; i < sizeof (zfid->zf_gen); i++) | |
1790 | fid_gen |= ((uint64_t)zfid->zf_gen[i]) << (8 * i); | |
1791 | } else { | |
1792 | ZFS_EXIT(zfsvfs); | |
1793 | return (EINVAL); | |
1794 | } | |
1795 | ||
1796 | /* A zero fid_gen means we are in the .zfs control directories */ | |
1797 | if (fid_gen == 0 && | |
1798 | (object == ZFSCTL_INO_ROOT || object == ZFSCTL_INO_SNAPDIR)) { | |
1799 | *vpp = zfsvfs->z_ctldir; | |
1800 | ASSERT(*vpp != NULL); | |
1801 | if (object == ZFSCTL_INO_SNAPDIR) { | |
1802 | VERIFY(zfsctl_root_lookup(*vpp, "snapshot", vpp, NULL, | |
1803 | 0, NULL, NULL, NULL, NULL, NULL) == 0); | |
1804 | } else { | |
1805 | VN_HOLD(*vpp); | |
1806 | } | |
1807 | ZFS_EXIT(zfsvfs); | |
1808 | return (0); | |
1809 | } | |
1810 | ||
1811 | gen_mask = -1ULL >> (64 - 8 * i); | |
1812 | ||
1813 | dprintf("getting %llu [%u mask %llx]\n", object, fid_gen, gen_mask); | |
1814 | if (err = zfs_zget(zfsvfs, object, &zp)) { | |
1815 | ZFS_EXIT(zfsvfs); | |
1816 | return (err); | |
1817 | } | |
1818 | zp_gen = zp->z_phys->zp_gen & gen_mask; | |
1819 | if (zp_gen == 0) | |
1820 | zp_gen = 1; | |
1821 | if (zp->z_unlinked || zp_gen != fid_gen) { | |
1822 | dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen, fid_gen); | |
1823 | VN_RELE(ZTOV(zp)); | |
1824 | ZFS_EXIT(zfsvfs); | |
1825 | return (EINVAL); | |
1826 | } | |
1827 | ||
1828 | *vpp = ZTOV(zp); | |
1829 | ZFS_EXIT(zfsvfs); | |
1830 | return (0); | |
1831 | } | |
1832 | ||
1833 | /* | |
1834 | * Block out VOPs and close zfsvfs_t::z_os | |
1835 | * | |
1836 | * Note, if successful, then we return with the 'z_teardown_lock' and | |
1837 | * 'z_teardown_inactive_lock' write held. | |
1838 | */ | |
1839 | int | |
9babb374 | 1840 | zfs_suspend_fs(zfsvfs_t *zfsvfs, char *name, int *modep) |
34dc7c2f BB |
1841 | { |
1842 | int error; | |
1843 | ||
1844 | if ((error = zfsvfs_teardown(zfsvfs, B_FALSE)) != 0) | |
1845 | return (error); | |
1846 | ||
9babb374 BB |
1847 | *modep = zfsvfs->z_os->os_mode; |
1848 | if (name) | |
1849 | dmu_objset_name(zfsvfs->z_os, name); | |
34dc7c2f BB |
1850 | dmu_objset_close(zfsvfs->z_os); |
1851 | ||
1852 | return (0); | |
1853 | } | |
1854 | ||
1855 | /* | |
1856 | * Reopen zfsvfs_t::z_os and release VOPs. | |
1857 | */ | |
1858 | int | |
1859 | zfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname, int mode) | |
1860 | { | |
1861 | int err; | |
1862 | ||
1863 | ASSERT(RRW_WRITE_HELD(&zfsvfs->z_teardown_lock)); | |
1864 | ASSERT(RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock)); | |
1865 | ||
1866 | err = dmu_objset_open(osname, DMU_OST_ZFS, mode, &zfsvfs->z_os); | |
1867 | if (err) { | |
1868 | zfsvfs->z_os = NULL; | |
1869 | } else { | |
1870 | znode_t *zp; | |
1871 | ||
1872 | VERIFY(zfsvfs_setup(zfsvfs, B_FALSE) == 0); | |
1873 | ||
1874 | /* | |
1875 | * Attempt to re-establish all the active znodes with | |
1876 | * their dbufs. If a zfs_rezget() fails, then we'll let | |
1877 | * any potential callers discover that via ZFS_ENTER_VERIFY_VP | |
1878 | * when they try to use their znode. | |
1879 | */ | |
1880 | mutex_enter(&zfsvfs->z_znodes_lock); | |
1881 | for (zp = list_head(&zfsvfs->z_all_znodes); zp; | |
1882 | zp = list_next(&zfsvfs->z_all_znodes, zp)) { | |
1883 | (void) zfs_rezget(zp); | |
1884 | } | |
1885 | mutex_exit(&zfsvfs->z_znodes_lock); | |
1886 | ||
1887 | } | |
1888 | ||
1889 | /* release the VOPs */ | |
1890 | rw_exit(&zfsvfs->z_teardown_inactive_lock); | |
1891 | rrw_exit(&zfsvfs->z_teardown_lock, FTAG); | |
1892 | ||
1893 | if (err) { | |
1894 | /* | |
1895 | * Since we couldn't reopen zfsvfs::z_os, force | |
1896 | * unmount this file system. | |
1897 | */ | |
1898 | if (vn_vfswlock(zfsvfs->z_vfs->vfs_vnodecovered) == 0) | |
1899 | (void) dounmount(zfsvfs->z_vfs, MS_FORCE, CRED()); | |
1900 | } | |
1901 | return (err); | |
1902 | } | |
1903 | ||
1904 | static void | |
1905 | zfs_freevfs(vfs_t *vfsp) | |
1906 | { | |
1907 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
34dc7c2f | 1908 | |
9babb374 BB |
1909 | /* |
1910 | * If this is a snapshot, we have an extra VFS_HOLD on our parent | |
1911 | * from zfs_mount(). Release it here. | |
1912 | */ | |
1913 | if (zfsvfs->z_issnap) | |
1914 | VFS_RELE(zfsvfs->z_parent->z_vfs); | |
34dc7c2f | 1915 | |
9babb374 | 1916 | zfsvfs_free(zfsvfs); |
34dc7c2f BB |
1917 | |
1918 | atomic_add_32(&zfs_active_fs_count, -1); | |
1919 | } | |
1920 | ||
1921 | /* | |
1922 | * VFS_INIT() initialization. Note that there is no VFS_FINI(), | |
1923 | * so we can't safely do any non-idempotent initialization here. | |
1924 | * Leave that to zfs_init() and zfs_fini(), which are called | |
1925 | * from the module's _init() and _fini() entry points. | |
1926 | */ | |
1927 | /*ARGSUSED*/ | |
1928 | static int | |
1929 | zfs_vfsinit(int fstype, char *name) | |
1930 | { | |
1931 | int error; | |
1932 | ||
1933 | zfsfstype = fstype; | |
1934 | ||
1935 | /* | |
1936 | * Setup vfsops and vnodeops tables. | |
1937 | */ | |
1938 | error = vfs_setfsops(fstype, zfs_vfsops_template, &zfs_vfsops); | |
1939 | if (error != 0) { | |
1940 | cmn_err(CE_WARN, "zfs: bad vfs ops template"); | |
1941 | } | |
1942 | ||
1943 | error = zfs_create_op_tables(); | |
1944 | if (error) { | |
1945 | zfs_remove_op_tables(); | |
1946 | cmn_err(CE_WARN, "zfs: bad vnode ops template"); | |
1947 | (void) vfs_freevfsops_by_type(zfsfstype); | |
1948 | return (error); | |
1949 | } | |
1950 | ||
1951 | mutex_init(&zfs_dev_mtx, NULL, MUTEX_DEFAULT, NULL); | |
1952 | ||
1953 | /* | |
1954 | * Unique major number for all zfs mounts. | |
1955 | * If we run out of 32-bit minors, we'll getudev() another major. | |
1956 | */ | |
1957 | zfs_major = ddi_name_to_major(ZFS_DRIVER); | |
1958 | zfs_minor = ZFS_MIN_MINOR; | |
1959 | ||
1960 | return (0); | |
1961 | } | |
1962 | ||
1963 | void | |
1964 | zfs_init(void) | |
1965 | { | |
1966 | /* | |
1967 | * Initialize .zfs directory structures | |
1968 | */ | |
1969 | zfsctl_init(); | |
1970 | ||
1971 | /* | |
1972 | * Initialize znode cache, vnode ops, etc... | |
1973 | */ | |
1974 | zfs_znode_init(); | |
9babb374 BB |
1975 | |
1976 | dmu_objset_register_type(DMU_OST_ZFS, zfs_space_delta_cb); | |
34dc7c2f BB |
1977 | } |
1978 | ||
1979 | void | |
1980 | zfs_fini(void) | |
1981 | { | |
1982 | zfsctl_fini(); | |
1983 | zfs_znode_fini(); | |
1984 | } | |
1985 | ||
1986 | int | |
1987 | zfs_busy(void) | |
1988 | { | |
1989 | return (zfs_active_fs_count != 0); | |
1990 | } | |
1991 | ||
1992 | int | |
9babb374 | 1993 | zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers) |
34dc7c2f BB |
1994 | { |
1995 | int error; | |
9babb374 | 1996 | objset_t *os = zfsvfs->z_os; |
34dc7c2f | 1997 | dmu_tx_t *tx; |
34dc7c2f BB |
1998 | |
1999 | if (newvers < ZPL_VERSION_INITIAL || newvers > ZPL_VERSION) | |
2000 | return (EINVAL); | |
2001 | ||
9babb374 BB |
2002 | if (newvers < zfsvfs->z_version) |
2003 | return (EINVAL); | |
34dc7c2f BB |
2004 | |
2005 | tx = dmu_tx_create(os); | |
9babb374 | 2006 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_FALSE, ZPL_VERSION_STR); |
34dc7c2f BB |
2007 | error = dmu_tx_assign(tx, TXG_WAIT); |
2008 | if (error) { | |
2009 | dmu_tx_abort(tx); | |
9babb374 BB |
2010 | return (error); |
2011 | } | |
2012 | error = zap_update(os, MASTER_NODE_OBJ, ZPL_VERSION_STR, | |
2013 | 8, 1, &newvers, tx); | |
2014 | ||
2015 | if (error) { | |
2016 | dmu_tx_commit(tx); | |
2017 | return (error); | |
34dc7c2f | 2018 | } |
34dc7c2f BB |
2019 | |
2020 | spa_history_internal_log(LOG_DS_UPGRADE, | |
2021 | dmu_objset_spa(os), tx, CRED(), | |
9babb374 BB |
2022 | "oldver=%llu newver=%llu dataset = %llu", |
2023 | zfsvfs->z_version, newvers, dmu_objset_id(os)); | |
2024 | ||
34dc7c2f BB |
2025 | dmu_tx_commit(tx); |
2026 | ||
9babb374 BB |
2027 | zfsvfs->z_version = newvers; |
2028 | ||
2029 | if (zfsvfs->z_version >= ZPL_VERSION_FUID) | |
2030 | zfs_set_fuid_feature(zfsvfs); | |
2031 | ||
2032 | return (0); | |
34dc7c2f BB |
2033 | } |
2034 | ||
2035 | /* | |
2036 | * Read a property stored within the master node. | |
2037 | */ | |
2038 | int | |
2039 | zfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value) | |
2040 | { | |
2041 | const char *pname; | |
b128c09f | 2042 | int error = ENOENT; |
34dc7c2f BB |
2043 | |
2044 | /* | |
2045 | * Look up the file system's value for the property. For the | |
2046 | * version property, we look up a slightly different string. | |
2047 | */ | |
2048 | if (prop == ZFS_PROP_VERSION) | |
2049 | pname = ZPL_VERSION_STR; | |
2050 | else | |
2051 | pname = zfs_prop_to_name(prop); | |
2052 | ||
b128c09f BB |
2053 | if (os != NULL) |
2054 | error = zap_lookup(os, MASTER_NODE_OBJ, pname, 8, 1, value); | |
34dc7c2f BB |
2055 | |
2056 | if (error == ENOENT) { | |
2057 | /* No value set, use the default value */ | |
2058 | switch (prop) { | |
2059 | case ZFS_PROP_VERSION: | |
2060 | *value = ZPL_VERSION; | |
2061 | break; | |
2062 | case ZFS_PROP_NORMALIZE: | |
2063 | case ZFS_PROP_UTF8ONLY: | |
2064 | *value = 0; | |
2065 | break; | |
2066 | case ZFS_PROP_CASE: | |
2067 | *value = ZFS_CASE_SENSITIVE; | |
2068 | break; | |
2069 | default: | |
2070 | return (error); | |
2071 | } | |
2072 | error = 0; | |
2073 | } | |
2074 | return (error); | |
2075 | } | |
2076 | ||
2077 | static vfsdef_t vfw = { | |
2078 | VFSDEF_VERSION, | |
2079 | MNTTYPE_ZFS, | |
2080 | zfs_vfsinit, | |
2081 | VSW_HASPROTO|VSW_CANRWRO|VSW_CANREMOUNT|VSW_VOLATILEDEV|VSW_STATS| | |
2082 | VSW_XID, | |
2083 | &zfs_mntopts | |
2084 | }; | |
2085 | ||
2086 | struct modlfs zfs_modlfs = { | |
2087 | &mod_fsops, "ZFS filesystem version " SPA_VERSION_STRING, &vfw | |
2088 | }; |