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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 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
34dc7c2f BB |
23 | */ |
24 | ||
428870ff BB |
25 | /* Portions Copyright 2010 Robert Milkowski */ |
26 | ||
34dc7c2f BB |
27 | #include <sys/types.h> |
28 | #include <sys/param.h> | |
29 | #include <sys/systm.h> | |
30 | #include <sys/sysmacros.h> | |
31 | #include <sys/kmem.h> | |
32 | #include <sys/pathname.h> | |
33 | #include <sys/vnode.h> | |
34 | #include <sys/vfs.h> | |
35 | #include <sys/vfs_opreg.h> | |
36 | #include <sys/mntent.h> | |
37 | #include <sys/mount.h> | |
38 | #include <sys/cmn_err.h> | |
39 | #include "fs/fs_subr.h" | |
40 | #include <sys/zfs_znode.h> | |
41 | #include <sys/zfs_dir.h> | |
42 | #include <sys/zil.h> | |
43 | #include <sys/fs/zfs.h> | |
44 | #include <sys/dmu.h> | |
45 | #include <sys/dsl_prop.h> | |
46 | #include <sys/dsl_dataset.h> | |
47 | #include <sys/dsl_deleg.h> | |
48 | #include <sys/spa.h> | |
49 | #include <sys/zap.h> | |
428870ff | 50 | #include <sys/sa.h> |
34dc7c2f BB |
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> | |
56 | #include <sys/refstr.h> | |
57 | #include <sys/zfs_ioctl.h> | |
58 | #include <sys/zfs_ctldir.h> | |
59 | #include <sys/zfs_fuid.h> | |
60 | #include <sys/bootconf.h> | |
61 | #include <sys/sunddi.h> | |
62 | #include <sys/dnlc.h> | |
63 | #include <sys/dmu_objset.h> | |
64 | #include <sys/spa_boot.h> | |
428870ff BB |
65 | #include <sys/sa.h> |
66 | #include "zfs_comutil.h" | |
34dc7c2f | 67 | |
60101509 | 68 | #ifdef HAVE_ZPL |
34dc7c2f BB |
69 | int zfsfstype; |
70 | vfsops_t *zfs_vfsops = NULL; | |
71 | static major_t zfs_major; | |
72 | static minor_t zfs_minor; | |
73 | static kmutex_t zfs_dev_mtx; | |
74 | ||
9babb374 BB |
75 | extern int sys_shutdown; |
76 | ||
34dc7c2f BB |
77 | static int zfs_mount(vfs_t *vfsp, vnode_t *mvp, struct mounta *uap, cred_t *cr); |
78 | static int zfs_umount(vfs_t *vfsp, int fflag, cred_t *cr); | |
79 | static int zfs_mountroot(vfs_t *vfsp, enum whymountroot); | |
80 | static int zfs_root(vfs_t *vfsp, vnode_t **vpp); | |
81 | static int zfs_statvfs(vfs_t *vfsp, struct statvfs64 *statp); | |
82 | static int zfs_vget(vfs_t *vfsp, vnode_t **vpp, fid_t *fidp); | |
83 | static void zfs_freevfs(vfs_t *vfsp); | |
84 | ||
85 | static const fs_operation_def_t zfs_vfsops_template[] = { | |
86 | VFSNAME_MOUNT, { .vfs_mount = zfs_mount }, | |
87 | VFSNAME_MOUNTROOT, { .vfs_mountroot = zfs_mountroot }, | |
88 | VFSNAME_UNMOUNT, { .vfs_unmount = zfs_umount }, | |
89 | VFSNAME_ROOT, { .vfs_root = zfs_root }, | |
90 | VFSNAME_STATVFS, { .vfs_statvfs = zfs_statvfs }, | |
91 | VFSNAME_SYNC, { .vfs_sync = zfs_sync }, | |
92 | VFSNAME_VGET, { .vfs_vget = zfs_vget }, | |
93 | VFSNAME_FREEVFS, { .vfs_freevfs = zfs_freevfs }, | |
94 | NULL, NULL | |
95 | }; | |
96 | ||
97 | static const fs_operation_def_t zfs_vfsops_eio_template[] = { | |
98 | VFSNAME_FREEVFS, { .vfs_freevfs = zfs_freevfs }, | |
99 | NULL, NULL | |
100 | }; | |
101 | ||
102 | /* | |
103 | * We need to keep a count of active fs's. | |
104 | * This is necessary to prevent our module | |
105 | * from being unloaded after a umount -f | |
106 | */ | |
107 | static uint32_t zfs_active_fs_count = 0; | |
108 | ||
109 | static char *noatime_cancel[] = { MNTOPT_ATIME, NULL }; | |
110 | static char *atime_cancel[] = { MNTOPT_NOATIME, NULL }; | |
111 | static char *noxattr_cancel[] = { MNTOPT_XATTR, NULL }; | |
112 | static char *xattr_cancel[] = { MNTOPT_NOXATTR, NULL }; | |
113 | ||
114 | /* | |
115 | * MO_DEFAULT is not used since the default value is determined | |
116 | * by the equivalent property. | |
117 | */ | |
118 | static mntopt_t mntopts[] = { | |
119 | { MNTOPT_NOXATTR, noxattr_cancel, NULL, 0, NULL }, | |
120 | { MNTOPT_XATTR, xattr_cancel, NULL, 0, NULL }, | |
121 | { MNTOPT_NOATIME, noatime_cancel, NULL, 0, NULL }, | |
122 | { MNTOPT_ATIME, atime_cancel, NULL, 0, NULL } | |
123 | }; | |
124 | ||
125 | static mntopts_t zfs_mntopts = { | |
126 | sizeof (mntopts) / sizeof (mntopt_t), | |
127 | mntopts | |
128 | }; | |
129 | ||
130 | /*ARGSUSED*/ | |
131 | int | |
132 | zfs_sync(vfs_t *vfsp, short flag, cred_t *cr) | |
133 | { | |
134 | /* | |
135 | * Data integrity is job one. We don't want a compromised kernel | |
136 | * writing to the storage pool, so we never sync during panic. | |
137 | */ | |
138 | if (panicstr) | |
139 | return (0); | |
140 | ||
141 | /* | |
142 | * SYNC_ATTR is used by fsflush() to force old filesystems like UFS | |
143 | * to sync metadata, which they would otherwise cache indefinitely. | |
144 | * Semantically, the only requirement is that the sync be initiated. | |
145 | * The DMU syncs out txgs frequently, so there's nothing to do. | |
146 | */ | |
147 | if (flag & SYNC_ATTR) | |
148 | return (0); | |
149 | ||
150 | if (vfsp != NULL) { | |
151 | /* | |
152 | * Sync a specific filesystem. | |
153 | */ | |
154 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
9babb374 | 155 | dsl_pool_t *dp; |
34dc7c2f BB |
156 | |
157 | ZFS_ENTER(zfsvfs); | |
9babb374 BB |
158 | dp = dmu_objset_pool(zfsvfs->z_os); |
159 | ||
160 | /* | |
161 | * If the system is shutting down, then skip any | |
162 | * filesystems which may exist on a suspended pool. | |
163 | */ | |
164 | if (sys_shutdown && spa_suspended(dp->dp_spa)) { | |
165 | ZFS_EXIT(zfsvfs); | |
166 | return (0); | |
167 | } | |
168 | ||
34dc7c2f | 169 | if (zfsvfs->z_log != NULL) |
572e2857 | 170 | zil_commit(zfsvfs->z_log, 0); |
428870ff | 171 | |
34dc7c2f BB |
172 | ZFS_EXIT(zfsvfs); |
173 | } else { | |
174 | /* | |
175 | * Sync all ZFS filesystems. This is what happens when you | |
176 | * run sync(1M). Unlike other filesystems, ZFS honors the | |
177 | * request by waiting for all pools to commit all dirty data. | |
178 | */ | |
179 | spa_sync_allpools(); | |
180 | } | |
181 | ||
182 | return (0); | |
183 | } | |
184 | ||
185 | static int | |
186 | zfs_create_unique_device(dev_t *dev) | |
187 | { | |
188 | major_t new_major; | |
189 | ||
190 | do { | |
191 | ASSERT3U(zfs_minor, <=, MAXMIN32); | |
192 | minor_t start = zfs_minor; | |
193 | do { | |
194 | mutex_enter(&zfs_dev_mtx); | |
195 | if (zfs_minor >= MAXMIN32) { | |
196 | /* | |
197 | * If we're still using the real major | |
198 | * keep out of /dev/zfs and /dev/zvol minor | |
199 | * number space. If we're using a getudev()'ed | |
200 | * major number, we can use all of its minors. | |
201 | */ | |
202 | if (zfs_major == ddi_name_to_major(ZFS_DRIVER)) | |
203 | zfs_minor = ZFS_MIN_MINOR; | |
204 | else | |
205 | zfs_minor = 0; | |
206 | } else { | |
207 | zfs_minor++; | |
208 | } | |
209 | *dev = makedevice(zfs_major, zfs_minor); | |
210 | mutex_exit(&zfs_dev_mtx); | |
211 | } while (vfs_devismounted(*dev) && zfs_minor != start); | |
212 | if (zfs_minor == start) { | |
213 | /* | |
214 | * We are using all ~262,000 minor numbers for the | |
215 | * current major number. Create a new major number. | |
216 | */ | |
217 | if ((new_major = getudev()) == (major_t)-1) { | |
218 | cmn_err(CE_WARN, | |
219 | "zfs_mount: Can't get unique major " | |
220 | "device number."); | |
221 | return (-1); | |
222 | } | |
223 | mutex_enter(&zfs_dev_mtx); | |
224 | zfs_major = new_major; | |
225 | zfs_minor = 0; | |
226 | ||
227 | mutex_exit(&zfs_dev_mtx); | |
228 | } else { | |
229 | break; | |
230 | } | |
231 | /* CONSTANTCONDITION */ | |
232 | } while (1); | |
233 | ||
234 | return (0); | |
235 | } | |
236 | ||
237 | static void | |
238 | atime_changed_cb(void *arg, uint64_t newval) | |
239 | { | |
240 | zfsvfs_t *zfsvfs = arg; | |
241 | ||
242 | if (newval == TRUE) { | |
243 | zfsvfs->z_atime = TRUE; | |
244 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME); | |
245 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_ATIME, NULL, 0); | |
246 | } else { | |
247 | zfsvfs->z_atime = FALSE; | |
248 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_ATIME); | |
249 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME, NULL, 0); | |
250 | } | |
251 | } | |
252 | ||
253 | static void | |
254 | xattr_changed_cb(void *arg, uint64_t newval) | |
255 | { | |
256 | zfsvfs_t *zfsvfs = arg; | |
257 | ||
258 | if (newval == TRUE) { | |
259 | /* XXX locking on vfs_flag? */ | |
260 | zfsvfs->z_vfs->vfs_flag |= VFS_XATTR; | |
261 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR); | |
262 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_XATTR, NULL, 0); | |
263 | } else { | |
264 | /* XXX locking on vfs_flag? */ | |
265 | zfsvfs->z_vfs->vfs_flag &= ~VFS_XATTR; | |
266 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_XATTR); | |
267 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOXATTR, NULL, 0); | |
268 | } | |
269 | } | |
270 | ||
271 | static void | |
272 | blksz_changed_cb(void *arg, uint64_t newval) | |
273 | { | |
274 | zfsvfs_t *zfsvfs = arg; | |
275 | ||
276 | if (newval < SPA_MINBLOCKSIZE || | |
277 | newval > SPA_MAXBLOCKSIZE || !ISP2(newval)) | |
278 | newval = SPA_MAXBLOCKSIZE; | |
279 | ||
280 | zfsvfs->z_max_blksz = newval; | |
281 | zfsvfs->z_vfs->vfs_bsize = newval; | |
282 | } | |
283 | ||
284 | static void | |
285 | readonly_changed_cb(void *arg, uint64_t newval) | |
286 | { | |
287 | zfsvfs_t *zfsvfs = arg; | |
288 | ||
289 | if (newval) { | |
290 | /* XXX locking on vfs_flag? */ | |
291 | zfsvfs->z_vfs->vfs_flag |= VFS_RDONLY; | |
292 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RW); | |
293 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RO, NULL, 0); | |
294 | } else { | |
295 | /* XXX locking on vfs_flag? */ | |
296 | zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; | |
297 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RO); | |
298 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RW, NULL, 0); | |
299 | } | |
300 | } | |
301 | ||
302 | static void | |
303 | devices_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_NODEVICES; | |
309 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_DEVICES); | |
310 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NODEVICES, NULL, 0); | |
311 | } else { | |
312 | zfsvfs->z_vfs->vfs_flag &= ~VFS_NODEVICES; | |
313 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NODEVICES); | |
314 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_DEVICES, NULL, 0); | |
315 | } | |
316 | } | |
317 | ||
318 | static void | |
319 | setuid_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_NOSETUID; | |
325 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_SETUID); | |
326 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID, NULL, 0); | |
327 | } else { | |
328 | zfsvfs->z_vfs->vfs_flag &= ~VFS_NOSETUID; | |
329 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID); | |
330 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_SETUID, NULL, 0); | |
331 | } | |
332 | } | |
333 | ||
334 | static void | |
335 | exec_changed_cb(void *arg, uint64_t newval) | |
336 | { | |
337 | zfsvfs_t *zfsvfs = arg; | |
338 | ||
339 | if (newval == FALSE) { | |
340 | zfsvfs->z_vfs->vfs_flag |= VFS_NOEXEC; | |
341 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_EXEC); | |
342 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC, NULL, 0); | |
343 | } else { | |
344 | zfsvfs->z_vfs->vfs_flag &= ~VFS_NOEXEC; | |
345 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC); | |
346 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_EXEC, NULL, 0); | |
347 | } | |
348 | } | |
349 | ||
350 | /* | |
351 | * The nbmand mount option can be changed at mount time. | |
352 | * We can't allow it to be toggled on live file systems or incorrect | |
353 | * behavior may be seen from cifs clients | |
354 | * | |
355 | * This property isn't registered via dsl_prop_register(), but this callback | |
356 | * will be called when a file system is first mounted | |
357 | */ | |
358 | static void | |
359 | nbmand_changed_cb(void *arg, uint64_t newval) | |
360 | { | |
361 | zfsvfs_t *zfsvfs = arg; | |
362 | if (newval == FALSE) { | |
363 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND); | |
364 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND, NULL, 0); | |
365 | } else { | |
366 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND); | |
367 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND, NULL, 0); | |
368 | } | |
369 | } | |
370 | ||
371 | static void | |
372 | snapdir_changed_cb(void *arg, uint64_t newval) | |
373 | { | |
374 | zfsvfs_t *zfsvfs = arg; | |
375 | ||
376 | zfsvfs->z_show_ctldir = newval; | |
377 | } | |
378 | ||
379 | static void | |
380 | vscan_changed_cb(void *arg, uint64_t newval) | |
381 | { | |
382 | zfsvfs_t *zfsvfs = arg; | |
383 | ||
384 | zfsvfs->z_vscan = newval; | |
385 | } | |
386 | ||
34dc7c2f BB |
387 | static void |
388 | acl_inherit_changed_cb(void *arg, uint64_t newval) | |
389 | { | |
390 | zfsvfs_t *zfsvfs = arg; | |
391 | ||
392 | zfsvfs->z_acl_inherit = newval; | |
393 | } | |
394 | ||
395 | static int | |
396 | zfs_register_callbacks(vfs_t *vfsp) | |
397 | { | |
398 | struct dsl_dataset *ds = NULL; | |
399 | objset_t *os = NULL; | |
400 | zfsvfs_t *zfsvfs = NULL; | |
401 | uint64_t nbmand; | |
402 | int readonly, do_readonly = B_FALSE; | |
403 | int setuid, do_setuid = B_FALSE; | |
404 | int exec, do_exec = B_FALSE; | |
405 | int devices, do_devices = B_FALSE; | |
406 | int xattr, do_xattr = B_FALSE; | |
407 | int atime, do_atime = B_FALSE; | |
408 | int error = 0; | |
409 | ||
410 | ASSERT(vfsp); | |
411 | zfsvfs = vfsp->vfs_data; | |
412 | ASSERT(zfsvfs); | |
413 | os = zfsvfs->z_os; | |
414 | ||
415 | /* | |
416 | * The act of registering our callbacks will destroy any mount | |
417 | * options we may have. In order to enable temporary overrides | |
418 | * of mount options, we stash away the current values and | |
419 | * restore them after we register the callbacks. | |
420 | */ | |
572e2857 BB |
421 | if (vfs_optionisset(vfsp, MNTOPT_RO, NULL) || |
422 | !spa_writeable(dmu_objset_spa(os))) { | |
34dc7c2f BB |
423 | readonly = B_TRUE; |
424 | do_readonly = B_TRUE; | |
425 | } else if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) { | |
426 | readonly = B_FALSE; | |
427 | do_readonly = B_TRUE; | |
428 | } | |
429 | if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) { | |
430 | devices = B_FALSE; | |
431 | setuid = B_FALSE; | |
432 | do_devices = B_TRUE; | |
433 | do_setuid = B_TRUE; | |
434 | } else { | |
435 | if (vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL)) { | |
436 | devices = B_FALSE; | |
437 | do_devices = B_TRUE; | |
438 | } else if (vfs_optionisset(vfsp, MNTOPT_DEVICES, NULL)) { | |
439 | devices = B_TRUE; | |
440 | do_devices = B_TRUE; | |
441 | } | |
442 | ||
443 | if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) { | |
444 | setuid = B_FALSE; | |
445 | do_setuid = B_TRUE; | |
446 | } else if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) { | |
447 | setuid = B_TRUE; | |
448 | do_setuid = B_TRUE; | |
449 | } | |
450 | } | |
451 | if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) { | |
452 | exec = B_FALSE; | |
453 | do_exec = B_TRUE; | |
454 | } else if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) { | |
455 | exec = B_TRUE; | |
456 | do_exec = B_TRUE; | |
457 | } | |
458 | if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL)) { | |
459 | xattr = B_FALSE; | |
460 | do_xattr = B_TRUE; | |
461 | } else if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL)) { | |
462 | xattr = B_TRUE; | |
463 | do_xattr = B_TRUE; | |
464 | } | |
465 | if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) { | |
466 | atime = B_FALSE; | |
467 | do_atime = B_TRUE; | |
468 | } else if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL)) { | |
469 | atime = B_TRUE; | |
470 | do_atime = B_TRUE; | |
471 | } | |
472 | ||
473 | /* | |
474 | * nbmand is a special property. It can only be changed at | |
475 | * mount time. | |
476 | * | |
477 | * This is weird, but it is documented to only be changeable | |
478 | * at mount time. | |
479 | */ | |
480 | if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) { | |
481 | nbmand = B_FALSE; | |
482 | } else if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) { | |
483 | nbmand = B_TRUE; | |
484 | } else { | |
485 | char osname[MAXNAMELEN]; | |
486 | ||
487 | dmu_objset_name(os, osname); | |
149e873a BB |
488 | if ((error = dsl_prop_get_integer(osname, "nbmand", &nbmand, |
489 | NULL))) { | |
b128c09f BB |
490 | return (error); |
491 | } | |
34dc7c2f BB |
492 | } |
493 | ||
494 | /* | |
495 | * Register property callbacks. | |
496 | * | |
497 | * It would probably be fine to just check for i/o error from | |
498 | * the first prop_register(), but I guess I like to go | |
499 | * overboard... | |
500 | */ | |
501 | ds = dmu_objset_ds(os); | |
502 | error = dsl_prop_register(ds, "atime", atime_changed_cb, zfsvfs); | |
503 | error = error ? error : dsl_prop_register(ds, | |
504 | "xattr", xattr_changed_cb, zfsvfs); | |
505 | error = error ? error : dsl_prop_register(ds, | |
506 | "recordsize", blksz_changed_cb, zfsvfs); | |
507 | error = error ? error : dsl_prop_register(ds, | |
508 | "readonly", readonly_changed_cb, zfsvfs); | |
509 | error = error ? error : dsl_prop_register(ds, | |
510 | "devices", devices_changed_cb, zfsvfs); | |
511 | error = error ? error : dsl_prop_register(ds, | |
512 | "setuid", setuid_changed_cb, zfsvfs); | |
513 | error = error ? error : dsl_prop_register(ds, | |
514 | "exec", exec_changed_cb, zfsvfs); | |
515 | error = error ? error : dsl_prop_register(ds, | |
516 | "snapdir", snapdir_changed_cb, zfsvfs); | |
34dc7c2f BB |
517 | error = error ? error : dsl_prop_register(ds, |
518 | "aclinherit", acl_inherit_changed_cb, zfsvfs); | |
519 | error = error ? error : dsl_prop_register(ds, | |
520 | "vscan", vscan_changed_cb, zfsvfs); | |
521 | if (error) | |
522 | goto unregister; | |
523 | ||
524 | /* | |
525 | * Invoke our callbacks to restore temporary mount options. | |
526 | */ | |
527 | if (do_readonly) | |
528 | readonly_changed_cb(zfsvfs, readonly); | |
529 | if (do_setuid) | |
530 | setuid_changed_cb(zfsvfs, setuid); | |
531 | if (do_exec) | |
532 | exec_changed_cb(zfsvfs, exec); | |
533 | if (do_devices) | |
534 | devices_changed_cb(zfsvfs, devices); | |
535 | if (do_xattr) | |
536 | xattr_changed_cb(zfsvfs, xattr); | |
537 | if (do_atime) | |
538 | atime_changed_cb(zfsvfs, atime); | |
539 | ||
540 | nbmand_changed_cb(zfsvfs, nbmand); | |
541 | ||
542 | return (0); | |
543 | ||
544 | unregister: | |
545 | /* | |
546 | * We may attempt to unregister some callbacks that are not | |
547 | * registered, but this is OK; it will simply return ENOMSG, | |
548 | * which we will ignore. | |
549 | */ | |
550 | (void) dsl_prop_unregister(ds, "atime", atime_changed_cb, zfsvfs); | |
551 | (void) dsl_prop_unregister(ds, "xattr", xattr_changed_cb, zfsvfs); | |
552 | (void) dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, zfsvfs); | |
553 | (void) dsl_prop_unregister(ds, "readonly", readonly_changed_cb, zfsvfs); | |
554 | (void) dsl_prop_unregister(ds, "devices", devices_changed_cb, zfsvfs); | |
555 | (void) dsl_prop_unregister(ds, "setuid", setuid_changed_cb, zfsvfs); | |
556 | (void) dsl_prop_unregister(ds, "exec", exec_changed_cb, zfsvfs); | |
557 | (void) dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, zfsvfs); | |
34dc7c2f BB |
558 | (void) dsl_prop_unregister(ds, "aclinherit", acl_inherit_changed_cb, |
559 | zfsvfs); | |
560 | (void) dsl_prop_unregister(ds, "vscan", vscan_changed_cb, zfsvfs); | |
561 | return (error); | |
562 | ||
563 | } | |
0151834d | 564 | #endif /* HAVE_ZPL */ |
34dc7c2f | 565 | |
428870ff BB |
566 | static int |
567 | zfs_space_delta_cb(dmu_object_type_t bonustype, void *data, | |
568 | uint64_t *userp, uint64_t *groupp) | |
9babb374 | 569 | { |
428870ff BB |
570 | znode_phys_t *znp = data; |
571 | int error = 0; | |
9babb374 | 572 | |
428870ff BB |
573 | /* |
574 | * Is it a valid type of object to track? | |
575 | */ | |
576 | if (bonustype != DMU_OT_ZNODE && bonustype != DMU_OT_SA) | |
577 | return (ENOENT); | |
9babb374 | 578 | |
428870ff BB |
579 | /* |
580 | * If we have a NULL data pointer | |
581 | * then assume the id's aren't changing and | |
582 | * return EEXIST to the dmu to let it know to | |
583 | * use the same ids | |
584 | */ | |
585 | if (data == NULL) | |
586 | return (EEXIST); | |
9babb374 | 587 | |
428870ff BB |
588 | if (bonustype == DMU_OT_ZNODE) { |
589 | *userp = znp->zp_uid; | |
590 | *groupp = znp->zp_gid; | |
9babb374 | 591 | } else { |
428870ff | 592 | int hdrsize; |
9babb374 | 593 | |
428870ff BB |
594 | ASSERT(bonustype == DMU_OT_SA); |
595 | hdrsize = sa_hdrsize(data); | |
596 | ||
597 | if (hdrsize != 0) { | |
598 | *userp = *((uint64_t *)((uintptr_t)data + hdrsize + | |
599 | SA_UID_OFFSET)); | |
600 | *groupp = *((uint64_t *)((uintptr_t)data + hdrsize + | |
601 | SA_GID_OFFSET)); | |
602 | } else { | |
603 | /* | |
604 | * This should only happen for newly created | |
605 | * files that haven't had the znode data filled | |
606 | * in yet. | |
607 | */ | |
608 | *userp = 0; | |
609 | *groupp = 0; | |
610 | } | |
9babb374 | 611 | } |
428870ff | 612 | return (error); |
9babb374 BB |
613 | } |
614 | ||
0151834d | 615 | #ifdef HAVE_ZPL |
9babb374 BB |
616 | static void |
617 | fuidstr_to_sid(zfsvfs_t *zfsvfs, const char *fuidstr, | |
618 | char *domainbuf, int buflen, uid_t *ridp) | |
619 | { | |
9babb374 BB |
620 | uint64_t fuid; |
621 | const char *domain; | |
622 | ||
623 | fuid = strtonum(fuidstr, NULL); | |
624 | ||
625 | domain = zfs_fuid_find_by_idx(zfsvfs, FUID_INDEX(fuid)); | |
626 | if (domain) | |
627 | (void) strlcpy(domainbuf, domain, buflen); | |
628 | else | |
629 | domainbuf[0] = '\0'; | |
630 | *ridp = FUID_RID(fuid); | |
631 | } | |
632 | ||
633 | static uint64_t | |
634 | zfs_userquota_prop_to_obj(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type) | |
635 | { | |
636 | switch (type) { | |
637 | case ZFS_PROP_USERUSED: | |
638 | return (DMU_USERUSED_OBJECT); | |
639 | case ZFS_PROP_GROUPUSED: | |
640 | return (DMU_GROUPUSED_OBJECT); | |
641 | case ZFS_PROP_USERQUOTA: | |
642 | return (zfsvfs->z_userquota_obj); | |
643 | case ZFS_PROP_GROUPQUOTA: | |
644 | return (zfsvfs->z_groupquota_obj); | |
149e873a BB |
645 | default: |
646 | return (ENOTSUP); | |
9babb374 BB |
647 | } |
648 | return (0); | |
649 | } | |
650 | ||
651 | int | |
652 | zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, | |
653 | uint64_t *cookiep, void *vbuf, uint64_t *bufsizep) | |
654 | { | |
655 | int error; | |
656 | zap_cursor_t zc; | |
657 | zap_attribute_t za; | |
658 | zfs_useracct_t *buf = vbuf; | |
659 | uint64_t obj; | |
660 | ||
661 | if (!dmu_objset_userspace_present(zfsvfs->z_os)) | |
662 | return (ENOTSUP); | |
663 | ||
664 | obj = zfs_userquota_prop_to_obj(zfsvfs, type); | |
665 | if (obj == 0) { | |
666 | *bufsizep = 0; | |
667 | return (0); | |
668 | } | |
669 | ||
670 | for (zap_cursor_init_serialized(&zc, zfsvfs->z_os, obj, *cookiep); | |
671 | (error = zap_cursor_retrieve(&zc, &za)) == 0; | |
672 | zap_cursor_advance(&zc)) { | |
673 | if ((uintptr_t)buf - (uintptr_t)vbuf + sizeof (zfs_useracct_t) > | |
674 | *bufsizep) | |
675 | break; | |
676 | ||
677 | fuidstr_to_sid(zfsvfs, za.za_name, | |
678 | buf->zu_domain, sizeof (buf->zu_domain), &buf->zu_rid); | |
679 | ||
680 | buf->zu_space = za.za_first_integer; | |
681 | buf++; | |
682 | } | |
683 | if (error == ENOENT) | |
684 | error = 0; | |
685 | ||
686 | ASSERT3U((uintptr_t)buf - (uintptr_t)vbuf, <=, *bufsizep); | |
687 | *bufsizep = (uintptr_t)buf - (uintptr_t)vbuf; | |
688 | *cookiep = zap_cursor_serialize(&zc); | |
689 | zap_cursor_fini(&zc); | |
690 | return (error); | |
691 | } | |
692 | ||
693 | /* | |
694 | * buf must be big enough (eg, 32 bytes) | |
695 | */ | |
696 | static int | |
697 | id_to_fuidstr(zfsvfs_t *zfsvfs, const char *domain, uid_t rid, | |
698 | char *buf, boolean_t addok) | |
699 | { | |
700 | uint64_t fuid; | |
701 | int domainid = 0; | |
702 | ||
703 | if (domain && domain[0]) { | |
704 | domainid = zfs_fuid_find_by_domain(zfsvfs, domain, NULL, addok); | |
705 | if (domainid == -1) | |
706 | return (ENOENT); | |
707 | } | |
708 | fuid = FUID_ENCODE(domainid, rid); | |
709 | (void) sprintf(buf, "%llx", (longlong_t)fuid); | |
710 | return (0); | |
711 | } | |
712 | ||
713 | int | |
714 | zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, | |
715 | const char *domain, uint64_t rid, uint64_t *valp) | |
716 | { | |
717 | char buf[32]; | |
718 | int err; | |
719 | uint64_t obj; | |
720 | ||
721 | *valp = 0; | |
722 | ||
723 | if (!dmu_objset_userspace_present(zfsvfs->z_os)) | |
724 | return (ENOTSUP); | |
725 | ||
726 | obj = zfs_userquota_prop_to_obj(zfsvfs, type); | |
727 | if (obj == 0) | |
728 | return (0); | |
729 | ||
730 | err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_FALSE); | |
731 | if (err) | |
732 | return (err); | |
733 | ||
734 | err = zap_lookup(zfsvfs->z_os, obj, buf, 8, 1, valp); | |
735 | if (err == ENOENT) | |
736 | err = 0; | |
737 | return (err); | |
738 | } | |
739 | ||
740 | int | |
741 | zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, | |
742 | const char *domain, uint64_t rid, uint64_t quota) | |
743 | { | |
744 | char buf[32]; | |
745 | int err; | |
746 | dmu_tx_t *tx; | |
747 | uint64_t *objp; | |
748 | boolean_t fuid_dirtied; | |
749 | ||
750 | if (type != ZFS_PROP_USERQUOTA && type != ZFS_PROP_GROUPQUOTA) | |
751 | return (EINVAL); | |
752 | ||
753 | if (zfsvfs->z_version < ZPL_VERSION_USERSPACE) | |
754 | return (ENOTSUP); | |
755 | ||
756 | objp = (type == ZFS_PROP_USERQUOTA) ? &zfsvfs->z_userquota_obj : | |
757 | &zfsvfs->z_groupquota_obj; | |
758 | ||
759 | err = id_to_fuidstr(zfsvfs, domain, rid, buf, B_TRUE); | |
760 | if (err) | |
761 | return (err); | |
762 | fuid_dirtied = zfsvfs->z_fuid_dirty; | |
763 | ||
764 | tx = dmu_tx_create(zfsvfs->z_os); | |
765 | dmu_tx_hold_zap(tx, *objp ? *objp : DMU_NEW_OBJECT, B_TRUE, NULL); | |
766 | if (*objp == 0) { | |
767 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE, | |
768 | zfs_userquota_prop_prefixes[type]); | |
769 | } | |
770 | if (fuid_dirtied) | |
771 | zfs_fuid_txhold(zfsvfs, tx); | |
772 | err = dmu_tx_assign(tx, TXG_WAIT); | |
773 | if (err) { | |
774 | dmu_tx_abort(tx); | |
775 | return (err); | |
776 | } | |
777 | ||
778 | mutex_enter(&zfsvfs->z_lock); | |
779 | if (*objp == 0) { | |
780 | *objp = zap_create(zfsvfs->z_os, DMU_OT_USERGROUP_QUOTA, | |
781 | DMU_OT_NONE, 0, tx); | |
782 | VERIFY(0 == zap_add(zfsvfs->z_os, MASTER_NODE_OBJ, | |
783 | zfs_userquota_prop_prefixes[type], 8, 1, objp, tx)); | |
784 | } | |
785 | mutex_exit(&zfsvfs->z_lock); | |
786 | ||
787 | if (quota == 0) { | |
788 | err = zap_remove(zfsvfs->z_os, *objp, buf, tx); | |
789 | if (err == ENOENT) | |
790 | err = 0; | |
791 | } else { | |
792 | err = zap_update(zfsvfs->z_os, *objp, buf, 8, 1, "a, tx); | |
793 | } | |
794 | ASSERT(err == 0); | |
795 | if (fuid_dirtied) | |
796 | zfs_fuid_sync(zfsvfs, tx); | |
797 | dmu_tx_commit(tx); | |
798 | return (err); | |
799 | } | |
800 | ||
801 | boolean_t | |
428870ff | 802 | zfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup, uint64_t fuid) |
9babb374 BB |
803 | { |
804 | char buf[32]; | |
805 | uint64_t used, quota, usedobj, quotaobj; | |
806 | int err; | |
807 | ||
808 | usedobj = isgroup ? DMU_GROUPUSED_OBJECT : DMU_USERUSED_OBJECT; | |
809 | quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj; | |
810 | ||
811 | if (quotaobj == 0 || zfsvfs->z_replay) | |
812 | return (B_FALSE); | |
813 | ||
814 | (void) sprintf(buf, "%llx", (longlong_t)fuid); | |
815 | err = zap_lookup(zfsvfs->z_os, quotaobj, buf, 8, 1, "a); | |
816 | if (err != 0) | |
817 | return (B_FALSE); | |
818 | ||
819 | err = zap_lookup(zfsvfs->z_os, usedobj, buf, 8, 1, &used); | |
820 | if (err != 0) | |
821 | return (B_FALSE); | |
822 | return (used >= quota); | |
823 | } | |
824 | ||
428870ff BB |
825 | boolean_t |
826 | zfs_owner_overquota(zfsvfs_t *zfsvfs, znode_t *zp, boolean_t isgroup) | |
827 | { | |
828 | uint64_t fuid; | |
829 | uint64_t quotaobj; | |
428870ff BB |
830 | |
831 | quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj; | |
832 | ||
572e2857 | 833 | fuid = isgroup ? zp->z_gid : zp->z_uid; |
428870ff BB |
834 | |
835 | if (quotaobj == 0 || zfsvfs->z_replay) | |
836 | return (B_FALSE); | |
837 | ||
428870ff BB |
838 | return (zfs_fuid_overquota(zfsvfs, isgroup, fuid)); |
839 | } | |
840 | ||
9babb374 | 841 | int |
428870ff | 842 | zfsvfs_create(const char *osname, zfsvfs_t **zfvp) |
9babb374 BB |
843 | { |
844 | objset_t *os; | |
845 | zfsvfs_t *zfsvfs; | |
846 | uint64_t zval; | |
847 | int i, error; | |
428870ff | 848 | uint64_t sa_obj; |
9babb374 | 849 | |
428870ff | 850 | zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); |
9babb374 | 851 | |
428870ff BB |
852 | /* |
853 | * We claim to always be readonly so we can open snapshots; | |
854 | * other ZPL code will prevent us from writing to snapshots. | |
855 | */ | |
856 | error = dmu_objset_own(osname, DMU_OST_ZFS, B_TRUE, zfsvfs, &os); | |
857 | if (error) { | |
858 | kmem_free(zfsvfs, sizeof (zfsvfs_t)); | |
9babb374 | 859 | return (error); |
428870ff | 860 | } |
9babb374 BB |
861 | |
862 | /* | |
863 | * Initialize the zfs-specific filesystem structure. | |
864 | * Should probably make this a kmem cache, shuffle fields, | |
865 | * and just bzero up to z_hold_mtx[]. | |
866 | */ | |
9babb374 BB |
867 | zfsvfs->z_vfs = NULL; |
868 | zfsvfs->z_parent = zfsvfs; | |
869 | zfsvfs->z_max_blksz = SPA_MAXBLOCKSIZE; | |
870 | zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE; | |
871 | zfsvfs->z_os = os; | |
872 | ||
873 | error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version); | |
874 | if (error) { | |
875 | goto out; | |
428870ff BB |
876 | } else if (zfsvfs->z_version > |
877 | zfs_zpl_version_map(spa_version(dmu_objset_spa(os)))) { | |
149e873a | 878 | (void) printk("Can't mount a version %lld file system " |
428870ff BB |
879 | "on a version %lld pool\n. Pool must be upgraded to mount " |
880 | "this file system.", (u_longlong_t)zfsvfs->z_version, | |
881 | (u_longlong_t)spa_version(dmu_objset_spa(os))); | |
9babb374 BB |
882 | error = ENOTSUP; |
883 | goto out; | |
884 | } | |
9babb374 BB |
885 | if ((error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &zval)) != 0) |
886 | goto out; | |
887 | zfsvfs->z_norm = (int)zval; | |
888 | ||
889 | if ((error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &zval)) != 0) | |
890 | goto out; | |
891 | zfsvfs->z_utf8 = (zval != 0); | |
892 | ||
893 | if ((error = zfs_get_zplprop(os, ZFS_PROP_CASE, &zval)) != 0) | |
894 | goto out; | |
895 | zfsvfs->z_case = (uint_t)zval; | |
896 | ||
897 | /* | |
898 | * Fold case on file systems that are always or sometimes case | |
899 | * insensitive. | |
900 | */ | |
901 | if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE || | |
902 | zfsvfs->z_case == ZFS_CASE_MIXED) | |
903 | zfsvfs->z_norm |= U8_TEXTPREP_TOUPPER; | |
904 | ||
905 | zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); | |
428870ff BB |
906 | zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); |
907 | ||
908 | if (zfsvfs->z_use_sa) { | |
909 | /* should either have both of these objects or none */ | |
910 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, | |
911 | &sa_obj); | |
912 | if (error) | |
913 | return (error); | |
914 | } else { | |
915 | /* | |
916 | * Pre SA versions file systems should never touch | |
917 | * either the attribute registration or layout objects. | |
918 | */ | |
919 | sa_obj = 0; | |
920 | } | |
921 | ||
572e2857 BB |
922 | error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END, |
923 | &zfsvfs->z_attr_table); | |
924 | if (error) | |
925 | goto out; | |
428870ff BB |
926 | |
927 | if (zfsvfs->z_version >= ZPL_VERSION_SA) | |
928 | sa_register_update_callback(os, zfs_sa_upgrade); | |
9babb374 BB |
929 | |
930 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, | |
931 | &zfsvfs->z_root); | |
932 | if (error) | |
933 | goto out; | |
934 | ASSERT(zfsvfs->z_root != 0); | |
935 | ||
936 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1, | |
937 | &zfsvfs->z_unlinkedobj); | |
938 | if (error) | |
939 | goto out; | |
940 | ||
941 | error = zap_lookup(os, MASTER_NODE_OBJ, | |
942 | zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA], | |
943 | 8, 1, &zfsvfs->z_userquota_obj); | |
944 | if (error && error != ENOENT) | |
945 | goto out; | |
946 | ||
947 | error = zap_lookup(os, MASTER_NODE_OBJ, | |
948 | zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA], | |
949 | 8, 1, &zfsvfs->z_groupquota_obj); | |
950 | if (error && error != ENOENT) | |
951 | goto out; | |
952 | ||
953 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1, | |
954 | &zfsvfs->z_fuid_obj); | |
955 | if (error && error != ENOENT) | |
956 | goto out; | |
957 | ||
958 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1, | |
959 | &zfsvfs->z_shares_dir); | |
960 | if (error && error != ENOENT) | |
961 | goto out; | |
962 | ||
963 | mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); | |
9babb374 BB |
964 | mutex_init(&zfsvfs->z_lock, NULL, MUTEX_DEFAULT, NULL); |
965 | list_create(&zfsvfs->z_all_znodes, sizeof (znode_t), | |
966 | offsetof(znode_t, z_link_node)); | |
967 | rrw_init(&zfsvfs->z_teardown_lock); | |
968 | rw_init(&zfsvfs->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL); | |
969 | rw_init(&zfsvfs->z_fuid_lock, NULL, RW_DEFAULT, NULL); | |
970 | for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) | |
971 | mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); | |
972 | ||
428870ff | 973 | *zfvp = zfsvfs; |
9babb374 BB |
974 | return (0); |
975 | ||
976 | out: | |
428870ff BB |
977 | dmu_objset_disown(os, zfsvfs); |
978 | *zfvp = NULL; | |
9babb374 BB |
979 | kmem_free(zfsvfs, sizeof (zfsvfs_t)); |
980 | return (error); | |
981 | } | |
982 | ||
34dc7c2f BB |
983 | static int |
984 | zfsvfs_setup(zfsvfs_t *zfsvfs, boolean_t mounting) | |
985 | { | |
34dc7c2f BB |
986 | int error; |
987 | ||
988 | error = zfs_register_callbacks(zfsvfs->z_vfs); | |
989 | if (error) | |
990 | return (error); | |
991 | ||
992 | /* | |
993 | * Set the objset user_ptr to track its zfsvfs. | |
994 | */ | |
428870ff | 995 | mutex_enter(&zfsvfs->z_os->os_user_ptr_lock); |
34dc7c2f | 996 | dmu_objset_set_user(zfsvfs->z_os, zfsvfs); |
428870ff | 997 | mutex_exit(&zfsvfs->z_os->os_user_ptr_lock); |
34dc7c2f | 998 | |
9babb374 | 999 | zfsvfs->z_log = zil_open(zfsvfs->z_os, zfs_get_data); |
9babb374 | 1000 | |
34dc7c2f BB |
1001 | /* |
1002 | * If we are not mounting (ie: online recv), then we don't | |
1003 | * have to worry about replaying the log as we blocked all | |
1004 | * operations out since we closed the ZIL. | |
1005 | */ | |
1006 | if (mounting) { | |
b128c09f BB |
1007 | boolean_t readonly; |
1008 | ||
34dc7c2f BB |
1009 | /* |
1010 | * During replay we remove the read only flag to | |
1011 | * allow replays to succeed. | |
1012 | */ | |
1013 | readonly = zfsvfs->z_vfs->vfs_flag & VFS_RDONLY; | |
fb5f0bc8 BB |
1014 | if (readonly != 0) |
1015 | zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; | |
1016 | else | |
1017 | zfs_unlinked_drain(zfsvfs); | |
34dc7c2f | 1018 | |
428870ff BB |
1019 | /* |
1020 | * Parse and replay the intent log. | |
1021 | * | |
1022 | * Because of ziltest, this must be done after | |
1023 | * zfs_unlinked_drain(). (Further note: ziltest | |
1024 | * doesn't use readonly mounts, where | |
1025 | * zfs_unlinked_drain() isn't called.) This is because | |
1026 | * ziltest causes spa_sync() to think it's committed, | |
1027 | * but actually it is not, so the intent log contains | |
1028 | * many txg's worth of changes. | |
1029 | * | |
1030 | * In particular, if object N is in the unlinked set in | |
1031 | * the last txg to actually sync, then it could be | |
1032 | * actually freed in a later txg and then reallocated | |
1033 | * in a yet later txg. This would write a "create | |
1034 | * object N" record to the intent log. Normally, this | |
1035 | * would be fine because the spa_sync() would have | |
1036 | * written out the fact that object N is free, before | |
1037 | * we could write the "create object N" intent log | |
1038 | * record. | |
1039 | * | |
1040 | * But when we are in ziltest mode, we advance the "open | |
1041 | * txg" without actually spa_sync()-ing the changes to | |
1042 | * disk. So we would see that object N is still | |
1043 | * allocated and in the unlinked set, and there is an | |
1044 | * intent log record saying to allocate it. | |
1045 | */ | |
572e2857 BB |
1046 | if (spa_writeable(dmu_objset_spa(zfsvfs->z_os))) { |
1047 | if (zil_replay_disable) { | |
1048 | zil_destroy(zfsvfs->z_log, B_FALSE); | |
1049 | } else { | |
1050 | zfsvfs->z_replay = B_TRUE; | |
1051 | zil_replay(zfsvfs->z_os, zfsvfs, | |
1052 | zfs_replay_vector); | |
1053 | zfsvfs->z_replay = B_FALSE; | |
1054 | } | |
fb5f0bc8 | 1055 | } |
34dc7c2f BB |
1056 | zfsvfs->z_vfs->vfs_flag |= readonly; /* restore readonly bit */ |
1057 | } | |
1058 | ||
34dc7c2f BB |
1059 | return (0); |
1060 | } | |
1061 | ||
9babb374 BB |
1062 | void |
1063 | zfsvfs_free(zfsvfs_t *zfsvfs) | |
34dc7c2f | 1064 | { |
9babb374 BB |
1065 | int i; |
1066 | extern krwlock_t zfsvfs_lock; /* in zfs_znode.c */ | |
1067 | ||
1068 | /* | |
1069 | * This is a barrier to prevent the filesystem from going away in | |
1070 | * zfs_znode_move() until we can safely ensure that the filesystem is | |
1071 | * not unmounted. We consider the filesystem valid before the barrier | |
1072 | * and invalid after the barrier. | |
1073 | */ | |
1074 | rw_enter(&zfsvfs_lock, RW_READER); | |
1075 | rw_exit(&zfsvfs_lock); | |
1076 | ||
1077 | zfs_fuid_destroy(zfsvfs); | |
1078 | ||
34dc7c2f | 1079 | mutex_destroy(&zfsvfs->z_znodes_lock); |
9babb374 | 1080 | mutex_destroy(&zfsvfs->z_lock); |
34dc7c2f BB |
1081 | list_destroy(&zfsvfs->z_all_znodes); |
1082 | rrw_destroy(&zfsvfs->z_teardown_lock); | |
1083 | rw_destroy(&zfsvfs->z_teardown_inactive_lock); | |
1084 | rw_destroy(&zfsvfs->z_fuid_lock); | |
9babb374 BB |
1085 | for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) |
1086 | mutex_destroy(&zfsvfs->z_hold_mtx[i]); | |
34dc7c2f BB |
1087 | kmem_free(zfsvfs, sizeof (zfsvfs_t)); |
1088 | } | |
1089 | ||
9babb374 BB |
1090 | static void |
1091 | zfs_set_fuid_feature(zfsvfs_t *zfsvfs) | |
1092 | { | |
1093 | zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); | |
1094 | if (zfsvfs->z_use_fuids && zfsvfs->z_vfs) { | |
1095 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_XVATTR); | |
1096 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_SYSATTR_VIEWS); | |
1097 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACEMASKONACCESS); | |
1098 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACLONCREATE); | |
1099 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_ACCESS_FILTER); | |
428870ff | 1100 | vfs_set_feature(zfsvfs->z_vfs, VFSFT_REPARSE); |
9babb374 | 1101 | } |
428870ff | 1102 | zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); |
9babb374 BB |
1103 | } |
1104 | ||
34dc7c2f | 1105 | static int |
b128c09f | 1106 | zfs_domount(vfs_t *vfsp, char *osname) |
34dc7c2f BB |
1107 | { |
1108 | dev_t mount_dev; | |
9babb374 | 1109 | uint64_t recordsize, fsid_guid; |
34dc7c2f | 1110 | int error = 0; |
34dc7c2f | 1111 | zfsvfs_t *zfsvfs; |
34dc7c2f BB |
1112 | |
1113 | ASSERT(vfsp); | |
1114 | ASSERT(osname); | |
1115 | ||
428870ff | 1116 | error = zfsvfs_create(osname, &zfsvfs); |
9babb374 BB |
1117 | if (error) |
1118 | return (error); | |
34dc7c2f | 1119 | zfsvfs->z_vfs = vfsp; |
34dc7c2f BB |
1120 | |
1121 | /* Initialize the generic filesystem structure. */ | |
1122 | vfsp->vfs_bcount = 0; | |
1123 | vfsp->vfs_data = NULL; | |
1124 | ||
1125 | if (zfs_create_unique_device(&mount_dev) == -1) { | |
1126 | error = ENODEV; | |
1127 | goto out; | |
1128 | } | |
1129 | ASSERT(vfs_devismounted(mount_dev) == 0); | |
1130 | ||
149e873a BB |
1131 | if ((error = dsl_prop_get_integer(osname, "recordsize", |
1132 | &recordsize, NULL))) | |
34dc7c2f BB |
1133 | goto out; |
1134 | ||
1135 | vfsp->vfs_dev = mount_dev; | |
1136 | vfsp->vfs_fstype = zfsfstype; | |
1137 | vfsp->vfs_bsize = recordsize; | |
1138 | vfsp->vfs_flag |= VFS_NOTRUNC; | |
1139 | vfsp->vfs_data = zfsvfs; | |
1140 | ||
9babb374 BB |
1141 | /* |
1142 | * The fsid is 64 bits, composed of an 8-bit fs type, which | |
1143 | * separates our fsid from any other filesystem types, and a | |
1144 | * 56-bit objset unique ID. The objset unique ID is unique to | |
1145 | * all objsets open on this system, provided by unique_create(). | |
1146 | * The 8-bit fs type must be put in the low bits of fsid[1] | |
1147 | * because that's where other Solaris filesystems put it. | |
1148 | */ | |
1149 | fsid_guid = dmu_objset_fsid_guid(zfsvfs->z_os); | |
1150 | ASSERT((fsid_guid & ~((1ULL<<56)-1)) == 0); | |
1151 | vfsp->vfs_fsid.val[0] = fsid_guid; | |
1152 | vfsp->vfs_fsid.val[1] = ((fsid_guid>>32) << 8) | | |
1153 | zfsfstype & 0xFF; | |
34dc7c2f BB |
1154 | |
1155 | /* | |
1156 | * Set features for file system. | |
1157 | */ | |
9babb374 | 1158 | zfs_set_fuid_feature(zfsvfs); |
34dc7c2f BB |
1159 | if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE) { |
1160 | vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); | |
1161 | vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); | |
1162 | vfs_set_feature(vfsp, VFSFT_NOCASESENSITIVE); | |
1163 | } else if (zfsvfs->z_case == ZFS_CASE_MIXED) { | |
1164 | vfs_set_feature(vfsp, VFSFT_DIRENTFLAGS); | |
1165 | vfs_set_feature(vfsp, VFSFT_CASEINSENSITIVE); | |
1166 | } | |
428870ff | 1167 | vfs_set_feature(vfsp, VFSFT_ZEROCOPY_SUPPORTED); |
34dc7c2f BB |
1168 | |
1169 | if (dmu_objset_is_snapshot(zfsvfs->z_os)) { | |
1170 | uint64_t pval; | |
1171 | ||
34dc7c2f BB |
1172 | atime_changed_cb(zfsvfs, B_FALSE); |
1173 | readonly_changed_cb(zfsvfs, B_TRUE); | |
149e873a | 1174 | if ((error = dsl_prop_get_integer(osname,"xattr",&pval,NULL))) |
34dc7c2f BB |
1175 | goto out; |
1176 | xattr_changed_cb(zfsvfs, pval); | |
1177 | zfsvfs->z_issnap = B_TRUE; | |
572e2857 | 1178 | zfsvfs->z_os->os_sync = ZFS_SYNC_DISABLED; |
9babb374 | 1179 | |
428870ff | 1180 | mutex_enter(&zfsvfs->z_os->os_user_ptr_lock); |
9babb374 | 1181 | dmu_objset_set_user(zfsvfs->z_os, zfsvfs); |
428870ff | 1182 | mutex_exit(&zfsvfs->z_os->os_user_ptr_lock); |
34dc7c2f BB |
1183 | } else { |
1184 | error = zfsvfs_setup(zfsvfs, B_TRUE); | |
1185 | } | |
1186 | ||
1187 | if (!zfsvfs->z_issnap) | |
1188 | zfsctl_create(zfsvfs); | |
1189 | out: | |
1190 | if (error) { | |
428870ff | 1191 | dmu_objset_disown(zfsvfs->z_os, zfsvfs); |
9babb374 | 1192 | zfsvfs_free(zfsvfs); |
34dc7c2f BB |
1193 | } else { |
1194 | atomic_add_32(&zfs_active_fs_count, 1); | |
1195 | } | |
1196 | ||
1197 | return (error); | |
1198 | } | |
1199 | ||
1200 | void | |
1201 | zfs_unregister_callbacks(zfsvfs_t *zfsvfs) | |
1202 | { | |
1203 | objset_t *os = zfsvfs->z_os; | |
1204 | struct dsl_dataset *ds; | |
1205 | ||
1206 | /* | |
1207 | * Unregister properties. | |
1208 | */ | |
1209 | if (!dmu_objset_is_snapshot(os)) { | |
1210 | ds = dmu_objset_ds(os); | |
1211 | VERIFY(dsl_prop_unregister(ds, "atime", atime_changed_cb, | |
1212 | zfsvfs) == 0); | |
1213 | ||
1214 | VERIFY(dsl_prop_unregister(ds, "xattr", xattr_changed_cb, | |
1215 | zfsvfs) == 0); | |
1216 | ||
1217 | VERIFY(dsl_prop_unregister(ds, "recordsize", blksz_changed_cb, | |
1218 | zfsvfs) == 0); | |
1219 | ||
1220 | VERIFY(dsl_prop_unregister(ds, "readonly", readonly_changed_cb, | |
1221 | zfsvfs) == 0); | |
1222 | ||
1223 | VERIFY(dsl_prop_unregister(ds, "devices", devices_changed_cb, | |
1224 | zfsvfs) == 0); | |
1225 | ||
1226 | VERIFY(dsl_prop_unregister(ds, "setuid", setuid_changed_cb, | |
1227 | zfsvfs) == 0); | |
1228 | ||
1229 | VERIFY(dsl_prop_unregister(ds, "exec", exec_changed_cb, | |
1230 | zfsvfs) == 0); | |
1231 | ||
1232 | VERIFY(dsl_prop_unregister(ds, "snapdir", snapdir_changed_cb, | |
1233 | zfsvfs) == 0); | |
1234 | ||
34dc7c2f BB |
1235 | VERIFY(dsl_prop_unregister(ds, "aclinherit", |
1236 | acl_inherit_changed_cb, zfsvfs) == 0); | |
1237 | ||
1238 | VERIFY(dsl_prop_unregister(ds, "vscan", | |
1239 | vscan_changed_cb, zfsvfs) == 0); | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * Convert a decimal digit string to a uint64_t integer. | |
1245 | */ | |
1246 | static int | |
1247 | str_to_uint64(char *str, uint64_t *objnum) | |
1248 | { | |
1249 | uint64_t num = 0; | |
1250 | ||
1251 | while (*str) { | |
1252 | if (*str < '0' || *str > '9') | |
1253 | return (EINVAL); | |
1254 | ||
1255 | num = num*10 + *str++ - '0'; | |
1256 | } | |
1257 | ||
1258 | *objnum = num; | |
1259 | return (0); | |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * The boot path passed from the boot loader is in the form of | |
1264 | * "rootpool-name/root-filesystem-object-number'. Convert this | |
1265 | * string to a dataset name: "rootpool-name/root-filesystem-name". | |
1266 | */ | |
1267 | static int | |
1268 | zfs_parse_bootfs(char *bpath, char *outpath) | |
1269 | { | |
1270 | char *slashp; | |
1271 | uint64_t objnum; | |
1272 | int error; | |
1273 | ||
1274 | if (*bpath == 0 || *bpath == '/') | |
1275 | return (EINVAL); | |
1276 | ||
b128c09f BB |
1277 | (void) strcpy(outpath, bpath); |
1278 | ||
34dc7c2f BB |
1279 | slashp = strchr(bpath, '/'); |
1280 | ||
1281 | /* if no '/', just return the pool name */ | |
1282 | if (slashp == NULL) { | |
34dc7c2f BB |
1283 | return (0); |
1284 | } | |
1285 | ||
b128c09f BB |
1286 | /* if not a number, just return the root dataset name */ |
1287 | if (str_to_uint64(slashp+1, &objnum)) { | |
1288 | return (0); | |
1289 | } | |
34dc7c2f BB |
1290 | |
1291 | *slashp = '\0'; | |
1292 | error = dsl_dsobj_to_dsname(bpath, objnum, outpath); | |
1293 | *slashp = '/'; | |
1294 | ||
1295 | return (error); | |
1296 | } | |
1297 | ||
428870ff BB |
1298 | /* |
1299 | * zfs_check_global_label: | |
1300 | * Check that the hex label string is appropriate for the dataset | |
1301 | * being mounted into the global_zone proper. | |
1302 | * | |
1303 | * Return an error if the hex label string is not default or | |
1304 | * admin_low/admin_high. For admin_low labels, the corresponding | |
1305 | * dataset must be readonly. | |
1306 | */ | |
1307 | int | |
1308 | zfs_check_global_label(const char *dsname, const char *hexsl) | |
1309 | { | |
1310 | if (strcasecmp(hexsl, ZFS_MLSLABEL_DEFAULT) == 0) | |
1311 | return (0); | |
1312 | if (strcasecmp(hexsl, ADMIN_HIGH) == 0) | |
1313 | return (0); | |
1314 | if (strcasecmp(hexsl, ADMIN_LOW) == 0) { | |
1315 | /* must be readonly */ | |
1316 | uint64_t rdonly; | |
1317 | ||
1318 | if (dsl_prop_get_integer(dsname, | |
1319 | zfs_prop_to_name(ZFS_PROP_READONLY), &rdonly, NULL)) | |
1320 | return (EACCES); | |
1321 | return (rdonly ? 0 : EACCES); | |
1322 | } | |
1323 | return (EACCES); | |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | * zfs_mount_label_policy: | |
1328 | * Determine whether the mount is allowed according to MAC check. | |
1329 | * by comparing (where appropriate) label of the dataset against | |
1330 | * the label of the zone being mounted into. If the dataset has | |
1331 | * no label, create one. | |
1332 | * | |
1333 | * Returns: | |
1334 | * 0 : access allowed | |
1335 | * >0 : error code, such as EACCES | |
1336 | */ | |
1337 | static int | |
1338 | zfs_mount_label_policy(vfs_t *vfsp, char *osname) | |
1339 | { | |
1340 | int error, retv; | |
1341 | zone_t *mntzone = NULL; | |
1342 | ts_label_t *mnt_tsl; | |
1343 | bslabel_t *mnt_sl; | |
1344 | bslabel_t ds_sl; | |
1345 | char ds_hexsl[MAXNAMELEN]; | |
1346 | ||
1347 | retv = EACCES; /* assume the worst */ | |
1348 | ||
1349 | /* | |
1350 | * Start by getting the dataset label if it exists. | |
1351 | */ | |
1352 | error = dsl_prop_get(osname, zfs_prop_to_name(ZFS_PROP_MLSLABEL), | |
1353 | 1, sizeof (ds_hexsl), &ds_hexsl, NULL); | |
1354 | if (error) | |
1355 | return (EACCES); | |
1356 | ||
1357 | /* | |
1358 | * If labeling is NOT enabled, then disallow the mount of datasets | |
1359 | * which have a non-default label already. No other label checks | |
1360 | * are needed. | |
1361 | */ | |
1362 | if (!is_system_labeled()) { | |
1363 | if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0) | |
1364 | return (0); | |
1365 | return (EACCES); | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * Get the label of the mountpoint. If mounting into the global | |
1370 | * zone (i.e. mountpoint is not within an active zone and the | |
1371 | * zoned property is off), the label must be default or | |
1372 | * admin_low/admin_high only; no other checks are needed. | |
1373 | */ | |
1374 | mntzone = zone_find_by_any_path(refstr_value(vfsp->vfs_mntpt), B_FALSE); | |
1375 | if (mntzone->zone_id == GLOBAL_ZONEID) { | |
1376 | uint64_t zoned; | |
1377 | ||
1378 | zone_rele(mntzone); | |
1379 | ||
1380 | if (dsl_prop_get_integer(osname, | |
1381 | zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) | |
1382 | return (EACCES); | |
1383 | if (!zoned) | |
1384 | return (zfs_check_global_label(osname, ds_hexsl)); | |
1385 | else | |
1386 | /* | |
1387 | * This is the case of a zone dataset being mounted | |
1388 | * initially, before the zone has been fully created; | |
1389 | * allow this mount into global zone. | |
1390 | */ | |
1391 | return (0); | |
1392 | } | |
1393 | ||
1394 | mnt_tsl = mntzone->zone_slabel; | |
1395 | ASSERT(mnt_tsl != NULL); | |
1396 | label_hold(mnt_tsl); | |
1397 | mnt_sl = label2bslabel(mnt_tsl); | |
1398 | ||
1399 | if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) == 0) { | |
1400 | /* | |
1401 | * The dataset doesn't have a real label, so fabricate one. | |
1402 | */ | |
1403 | char *str = NULL; | |
1404 | ||
1405 | if (l_to_str_internal(mnt_sl, &str) == 0 && | |
1406 | dsl_prop_set(osname, zfs_prop_to_name(ZFS_PROP_MLSLABEL), | |
1407 | ZPROP_SRC_LOCAL, 1, strlen(str) + 1, str) == 0) | |
1408 | retv = 0; | |
1409 | if (str != NULL) | |
1410 | kmem_free(str, strlen(str) + 1); | |
1411 | } else if (hexstr_to_label(ds_hexsl, &ds_sl) == 0) { | |
1412 | /* | |
1413 | * Now compare labels to complete the MAC check. If the | |
1414 | * labels are equal then allow access. If the mountpoint | |
1415 | * label dominates the dataset label, allow readonly access. | |
1416 | * Otherwise, access is denied. | |
1417 | */ | |
1418 | if (blequal(mnt_sl, &ds_sl)) | |
1419 | retv = 0; | |
1420 | else if (bldominates(mnt_sl, &ds_sl)) { | |
1421 | vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0); | |
1422 | retv = 0; | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | label_rele(mnt_tsl); | |
1427 | zone_rele(mntzone); | |
1428 | return (retv); | |
1429 | } | |
1430 | ||
34dc7c2f BB |
1431 | static int |
1432 | zfs_mountroot(vfs_t *vfsp, enum whymountroot why) | |
1433 | { | |
1434 | int error = 0; | |
1435 | static int zfsrootdone = 0; | |
1436 | zfsvfs_t *zfsvfs = NULL; | |
1437 | znode_t *zp = NULL; | |
1438 | vnode_t *vp = NULL; | |
1439 | char *zfs_bootfs; | |
b128c09f | 1440 | char *zfs_devid; |
34dc7c2f BB |
1441 | |
1442 | ASSERT(vfsp); | |
1443 | ||
1444 | /* | |
1445 | * The filesystem that we mount as root is defined in the | |
1446 | * boot property "zfs-bootfs" with a format of | |
1447 | * "poolname/root-dataset-objnum". | |
1448 | */ | |
1449 | if (why == ROOT_INIT) { | |
1450 | if (zfsrootdone++) | |
1451 | return (EBUSY); | |
1452 | /* | |
1453 | * the process of doing a spa_load will require the | |
1454 | * clock to be set before we could (for example) do | |
1455 | * something better by looking at the timestamp on | |
1456 | * an uberblock, so just set it to -1. | |
1457 | */ | |
1458 | clkset(-1); | |
1459 | ||
b128c09f BB |
1460 | if ((zfs_bootfs = spa_get_bootprop("zfs-bootfs")) == NULL) { |
1461 | cmn_err(CE_NOTE, "spa_get_bootfs: can not get " | |
1462 | "bootfs name"); | |
34dc7c2f BB |
1463 | return (EINVAL); |
1464 | } | |
b128c09f BB |
1465 | zfs_devid = spa_get_bootprop("diskdevid"); |
1466 | error = spa_import_rootpool(rootfs.bo_name, zfs_devid); | |
1467 | if (zfs_devid) | |
1468 | spa_free_bootprop(zfs_devid); | |
1469 | if (error) { | |
1470 | spa_free_bootprop(zfs_bootfs); | |
1471 | cmn_err(CE_NOTE, "spa_import_rootpool: error %d", | |
34dc7c2f BB |
1472 | error); |
1473 | return (error); | |
1474 | } | |
34dc7c2f | 1475 | if (error = zfs_parse_bootfs(zfs_bootfs, rootfs.bo_name)) { |
b128c09f BB |
1476 | spa_free_bootprop(zfs_bootfs); |
1477 | cmn_err(CE_NOTE, "zfs_parse_bootfs: error %d", | |
34dc7c2f BB |
1478 | error); |
1479 | return (error); | |
1480 | } | |
1481 | ||
b128c09f | 1482 | spa_free_bootprop(zfs_bootfs); |
34dc7c2f BB |
1483 | |
1484 | if (error = vfs_lock(vfsp)) | |
1485 | return (error); | |
1486 | ||
b128c09f BB |
1487 | if (error = zfs_domount(vfsp, rootfs.bo_name)) { |
1488 | cmn_err(CE_NOTE, "zfs_domount: error %d", error); | |
34dc7c2f BB |
1489 | goto out; |
1490 | } | |
1491 | ||
1492 | zfsvfs = (zfsvfs_t *)vfsp->vfs_data; | |
1493 | ASSERT(zfsvfs); | |
1494 | if (error = zfs_zget(zfsvfs, zfsvfs->z_root, &zp)) { | |
b128c09f | 1495 | cmn_err(CE_NOTE, "zfs_zget: error %d", error); |
34dc7c2f BB |
1496 | goto out; |
1497 | } | |
1498 | ||
1499 | vp = ZTOV(zp); | |
1500 | mutex_enter(&vp->v_lock); | |
1501 | vp->v_flag |= VROOT; | |
1502 | mutex_exit(&vp->v_lock); | |
1503 | rootvp = vp; | |
1504 | ||
1505 | /* | |
b128c09f | 1506 | * Leave rootvp held. The root file system is never unmounted. |
34dc7c2f | 1507 | */ |
34dc7c2f BB |
1508 | |
1509 | vfs_add((struct vnode *)0, vfsp, | |
1510 | (vfsp->vfs_flag & VFS_RDONLY) ? MS_RDONLY : 0); | |
1511 | out: | |
1512 | vfs_unlock(vfsp); | |
1513 | return (error); | |
1514 | } else if (why == ROOT_REMOUNT) { | |
1515 | readonly_changed_cb(vfsp->vfs_data, B_FALSE); | |
1516 | vfsp->vfs_flag |= VFS_REMOUNT; | |
1517 | ||
1518 | /* refresh mount options */ | |
1519 | zfs_unregister_callbacks(vfsp->vfs_data); | |
1520 | return (zfs_register_callbacks(vfsp)); | |
1521 | ||
1522 | } else if (why == ROOT_UNMOUNT) { | |
1523 | zfs_unregister_callbacks((zfsvfs_t *)vfsp->vfs_data); | |
1524 | (void) zfs_sync(vfsp, 0, 0); | |
1525 | return (0); | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * if "why" is equal to anything else other than ROOT_INIT, | |
1530 | * ROOT_REMOUNT, or ROOT_UNMOUNT, we do not support it. | |
1531 | */ | |
1532 | return (ENOTSUP); | |
1533 | } | |
1534 | ||
1535 | /*ARGSUSED*/ | |
1536 | static int | |
1537 | zfs_mount(vfs_t *vfsp, vnode_t *mvp, struct mounta *uap, cred_t *cr) | |
1538 | { | |
1539 | char *osname; | |
1540 | pathname_t spn; | |
1541 | int error = 0; | |
1542 | uio_seg_t fromspace = (uap->flags & MS_SYSSPACE) ? | |
1543 | UIO_SYSSPACE : UIO_USERSPACE; | |
1544 | int canwrite; | |
1545 | ||
1546 | if (mvp->v_type != VDIR) | |
1547 | return (ENOTDIR); | |
1548 | ||
1549 | mutex_enter(&mvp->v_lock); | |
1550 | if ((uap->flags & MS_REMOUNT) == 0 && | |
1551 | (uap->flags & MS_OVERLAY) == 0 && | |
1552 | (mvp->v_count != 1 || (mvp->v_flag & VROOT))) { | |
1553 | mutex_exit(&mvp->v_lock); | |
1554 | return (EBUSY); | |
1555 | } | |
1556 | mutex_exit(&mvp->v_lock); | |
1557 | ||
1558 | /* | |
1559 | * ZFS does not support passing unparsed data in via MS_DATA. | |
1560 | * Users should use the MS_OPTIONSTR interface; this means | |
1561 | * that all option parsing is already done and the options struct | |
1562 | * can be interrogated. | |
1563 | */ | |
1564 | if ((uap->flags & MS_DATA) && uap->datalen > 0) | |
1565 | return (EINVAL); | |
1566 | ||
1567 | /* | |
1568 | * Get the objset name (the "special" mount argument). | |
1569 | */ | |
149e873a | 1570 | if ((error = pn_get(uap->spec, fromspace, &spn))) |
34dc7c2f BB |
1571 | return (error); |
1572 | ||
1573 | osname = spn.pn_path; | |
1574 | ||
1575 | /* | |
1576 | * Check for mount privilege? | |
1577 | * | |
1578 | * If we don't have privilege then see if | |
1579 | * we have local permission to allow it | |
1580 | */ | |
1581 | error = secpolicy_fs_mount(cr, mvp, vfsp); | |
1582 | if (error) { | |
428870ff | 1583 | if (dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr) == 0) { |
34dc7c2f BB |
1584 | vattr_t vattr; |
1585 | ||
1586 | /* | |
1587 | * Make sure user is the owner of the mount point | |
1588 | * or has sufficient privileges. | |
1589 | */ | |
1590 | ||
1591 | vattr.va_mask = AT_UID; | |
1592 | ||
428870ff | 1593 | if (VOP_GETATTR(mvp, &vattr, 0, cr, NULL)) { |
34dc7c2f BB |
1594 | goto out; |
1595 | } | |
1596 | ||
1597 | if (secpolicy_vnode_owner(cr, vattr.va_uid) != 0 && | |
1598 | VOP_ACCESS(mvp, VWRITE, 0, cr, NULL) != 0) { | |
34dc7c2f BB |
1599 | goto out; |
1600 | } | |
34dc7c2f BB |
1601 | secpolicy_fs_mount_clearopts(cr, vfsp); |
1602 | } else { | |
1603 | goto out; | |
1604 | } | |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * Refuse to mount a filesystem if we are in a local zone and the | |
1609 | * dataset is not visible. | |
1610 | */ | |
1611 | if (!INGLOBALZONE(curproc) && | |
1612 | (!zone_dataset_visible(osname, &canwrite) || !canwrite)) { | |
1613 | error = EPERM; | |
1614 | goto out; | |
1615 | } | |
1616 | ||
428870ff BB |
1617 | error = zfs_mount_label_policy(vfsp, osname); |
1618 | if (error) | |
1619 | goto out; | |
1620 | ||
34dc7c2f BB |
1621 | /* |
1622 | * When doing a remount, we simply refresh our temporary properties | |
1623 | * according to those options set in the current VFS options. | |
1624 | */ | |
1625 | if (uap->flags & MS_REMOUNT) { | |
1626 | /* refresh mount options */ | |
1627 | zfs_unregister_callbacks(vfsp->vfs_data); | |
1628 | error = zfs_register_callbacks(vfsp); | |
1629 | goto out; | |
1630 | } | |
1631 | ||
b128c09f | 1632 | error = zfs_domount(vfsp, osname); |
34dc7c2f | 1633 | |
9babb374 BB |
1634 | /* |
1635 | * Add an extra VFS_HOLD on our parent vfs so that it can't | |
1636 | * disappear due to a forced unmount. | |
1637 | */ | |
1638 | if (error == 0 && ((zfsvfs_t *)vfsp->vfs_data)->z_issnap) | |
1639 | VFS_HOLD(mvp->v_vfsp); | |
1640 | ||
34dc7c2f BB |
1641 | out: |
1642 | pn_free(&spn); | |
1643 | return (error); | |
1644 | } | |
1645 | ||
1646 | static int | |
1647 | zfs_statvfs(vfs_t *vfsp, struct statvfs64 *statp) | |
1648 | { | |
1649 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1650 | dev32_t d32; | |
1651 | uint64_t refdbytes, availbytes, usedobjs, availobjs; | |
1652 | ||
1653 | ZFS_ENTER(zfsvfs); | |
1654 | ||
1655 | dmu_objset_space(zfsvfs->z_os, | |
1656 | &refdbytes, &availbytes, &usedobjs, &availobjs); | |
1657 | ||
1658 | /* | |
1659 | * The underlying storage pool actually uses multiple block sizes. | |
1660 | * We report the fragsize as the smallest block size we support, | |
1661 | * and we report our blocksize as the filesystem's maximum blocksize. | |
1662 | */ | |
1663 | statp->f_frsize = 1UL << SPA_MINBLOCKSHIFT; | |
1664 | statp->f_bsize = zfsvfs->z_max_blksz; | |
1665 | ||
1666 | /* | |
1667 | * The following report "total" blocks of various kinds in the | |
1668 | * file system, but reported in terms of f_frsize - the | |
1669 | * "fragment" size. | |
1670 | */ | |
1671 | ||
1672 | statp->f_blocks = (refdbytes + availbytes) >> SPA_MINBLOCKSHIFT; | |
1673 | statp->f_bfree = availbytes >> SPA_MINBLOCKSHIFT; | |
1674 | statp->f_bavail = statp->f_bfree; /* no root reservation */ | |
1675 | ||
1676 | /* | |
1677 | * statvfs() should really be called statufs(), because it assumes | |
1678 | * static metadata. ZFS doesn't preallocate files, so the best | |
1679 | * we can do is report the max that could possibly fit in f_files, | |
1680 | * and that minus the number actually used in f_ffree. | |
1681 | * For f_ffree, report the smaller of the number of object available | |
1682 | * and the number of blocks (each object will take at least a block). | |
1683 | */ | |
1684 | statp->f_ffree = MIN(availobjs, statp->f_bfree); | |
1685 | statp->f_favail = statp->f_ffree; /* no "root reservation" */ | |
1686 | statp->f_files = statp->f_ffree + usedobjs; | |
1687 | ||
1688 | (void) cmpldev(&d32, vfsp->vfs_dev); | |
1689 | statp->f_fsid = d32; | |
1690 | ||
1691 | /* | |
1692 | * We're a zfs filesystem. | |
1693 | */ | |
1694 | (void) strcpy(statp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name); | |
1695 | ||
1696 | statp->f_flag = vf_to_stf(vfsp->vfs_flag); | |
1697 | ||
1698 | statp->f_namemax = ZFS_MAXNAMELEN; | |
1699 | ||
1700 | /* | |
1701 | * We have all of 32 characters to stuff a string here. | |
1702 | * Is there anything useful we could/should provide? | |
1703 | */ | |
1704 | bzero(statp->f_fstr, sizeof (statp->f_fstr)); | |
1705 | ||
1706 | ZFS_EXIT(zfsvfs); | |
1707 | return (0); | |
1708 | } | |
1709 | ||
1710 | static int | |
1711 | zfs_root(vfs_t *vfsp, vnode_t **vpp) | |
1712 | { | |
1713 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1714 | znode_t *rootzp; | |
1715 | int error; | |
1716 | ||
1717 | ZFS_ENTER(zfsvfs); | |
1718 | ||
1719 | error = zfs_zget(zfsvfs, zfsvfs->z_root, &rootzp); | |
1720 | if (error == 0) | |
1721 | *vpp = ZTOV(rootzp); | |
1722 | ||
1723 | ZFS_EXIT(zfsvfs); | |
1724 | return (error); | |
1725 | } | |
1726 | ||
1727 | /* | |
1728 | * Teardown the zfsvfs::z_os. | |
1729 | * | |
1730 | * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock' | |
1731 | * and 'z_teardown_inactive_lock' held. | |
1732 | */ | |
1733 | static int | |
1734 | zfsvfs_teardown(zfsvfs_t *zfsvfs, boolean_t unmounting) | |
1735 | { | |
1736 | znode_t *zp; | |
1737 | ||
1738 | rrw_enter(&zfsvfs->z_teardown_lock, RW_WRITER, FTAG); | |
1739 | ||
1740 | if (!unmounting) { | |
1741 | /* | |
1742 | * We purge the parent filesystem's vfsp as the parent | |
1743 | * filesystem and all of its snapshots have their vnode's | |
1744 | * v_vfsp set to the parent's filesystem's vfsp. Note, | |
1745 | * 'z_parent' is self referential for non-snapshots. | |
1746 | */ | |
1747 | (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); | |
1748 | } | |
1749 | ||
1750 | /* | |
1751 | * Close the zil. NB: Can't close the zil while zfs_inactive | |
1752 | * threads are blocked as zil_close can call zfs_inactive. | |
1753 | */ | |
1754 | if (zfsvfs->z_log) { | |
1755 | zil_close(zfsvfs->z_log); | |
1756 | zfsvfs->z_log = NULL; | |
1757 | } | |
1758 | ||
1759 | rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_WRITER); | |
1760 | ||
1761 | /* | |
1762 | * If we are not unmounting (ie: online recv) and someone already | |
1763 | * unmounted this file system while we were doing the switcheroo, | |
1764 | * or a reopen of z_os failed then just bail out now. | |
1765 | */ | |
1766 | if (!unmounting && (zfsvfs->z_unmounted || zfsvfs->z_os == NULL)) { | |
1767 | rw_exit(&zfsvfs->z_teardown_inactive_lock); | |
1768 | rrw_exit(&zfsvfs->z_teardown_lock, FTAG); | |
1769 | return (EIO); | |
1770 | } | |
1771 | ||
1772 | /* | |
1773 | * At this point there are no vops active, and any new vops will | |
1774 | * fail with EIO since we have z_teardown_lock for writer (only | |
1775 | * relavent for forced unmount). | |
1776 | * | |
1777 | * Release all holds on dbufs. | |
1778 | */ | |
1779 | mutex_enter(&zfsvfs->z_znodes_lock); | |
1780 | for (zp = list_head(&zfsvfs->z_all_znodes); zp != NULL; | |
1781 | zp = list_next(&zfsvfs->z_all_znodes, zp)) | |
428870ff | 1782 | if (zp->z_sa_hdl) { |
34dc7c2f BB |
1783 | ASSERT(ZTOV(zp)->v_count > 0); |
1784 | zfs_znode_dmu_fini(zp); | |
1785 | } | |
1786 | mutex_exit(&zfsvfs->z_znodes_lock); | |
1787 | ||
1788 | /* | |
1789 | * If we are unmounting, set the unmounted flag and let new vops | |
1790 | * unblock. zfs_inactive will have the unmounted behavior, and all | |
1791 | * other vops will fail with EIO. | |
1792 | */ | |
1793 | if (unmounting) { | |
1794 | zfsvfs->z_unmounted = B_TRUE; | |
1795 | rrw_exit(&zfsvfs->z_teardown_lock, FTAG); | |
1796 | rw_exit(&zfsvfs->z_teardown_inactive_lock); | |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * z_os will be NULL if there was an error in attempting to reopen | |
1801 | * zfsvfs, so just return as the properties had already been | |
1802 | * unregistered and cached data had been evicted before. | |
1803 | */ | |
1804 | if (zfsvfs->z_os == NULL) | |
1805 | return (0); | |
1806 | ||
1807 | /* | |
1808 | * Unregister properties. | |
1809 | */ | |
1810 | zfs_unregister_callbacks(zfsvfs); | |
1811 | ||
1812 | /* | |
1813 | * Evict cached data | |
1814 | */ | |
572e2857 BB |
1815 | if (dmu_objset_is_dirty_anywhere(zfsvfs->z_os)) |
1816 | if (!(zfsvfs->z_vfs->vfs_flag & VFS_RDONLY)) | |
1817 | txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0); | |
1818 | (void) dmu_objset_evict_dbufs(zfsvfs->z_os); | |
34dc7c2f BB |
1819 | |
1820 | return (0); | |
1821 | } | |
1822 | ||
1823 | /*ARGSUSED*/ | |
1824 | static int | |
1825 | zfs_umount(vfs_t *vfsp, int fflag, cred_t *cr) | |
1826 | { | |
1827 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1828 | objset_t *os; | |
1829 | int ret; | |
1830 | ||
1831 | ret = secpolicy_fs_unmount(cr, vfsp); | |
1832 | if (ret) { | |
428870ff BB |
1833 | if (dsl_deleg_access((char *)refstr_value(vfsp->vfs_resource), |
1834 | ZFS_DELEG_PERM_MOUNT, cr)) | |
34dc7c2f BB |
1835 | return (ret); |
1836 | } | |
1837 | ||
1838 | /* | |
1839 | * We purge the parent filesystem's vfsp as the parent filesystem | |
1840 | * and all of its snapshots have their vnode's v_vfsp set to the | |
1841 | * parent's filesystem's vfsp. Note, 'z_parent' is self | |
1842 | * referential for non-snapshots. | |
1843 | */ | |
1844 | (void) dnlc_purge_vfsp(zfsvfs->z_parent->z_vfs, 0); | |
1845 | ||
1846 | /* | |
1847 | * Unmount any snapshots mounted under .zfs before unmounting the | |
1848 | * dataset itself. | |
1849 | */ | |
1850 | if (zfsvfs->z_ctldir != NULL && | |
1851 | (ret = zfsctl_umount_snapshots(vfsp, fflag, cr)) != 0) { | |
1852 | return (ret); | |
1853 | } | |
1854 | ||
1855 | if (!(fflag & MS_FORCE)) { | |
1856 | /* | |
1857 | * Check the number of active vnodes in the file system. | |
1858 | * Our count is maintained in the vfs structure, but the | |
1859 | * number is off by 1 to indicate a hold on the vfs | |
1860 | * structure itself. | |
1861 | * | |
1862 | * The '.zfs' directory maintains a reference of its | |
1863 | * own, and any active references underneath are | |
1864 | * reflected in the vnode count. | |
1865 | */ | |
1866 | if (zfsvfs->z_ctldir == NULL) { | |
1867 | if (vfsp->vfs_count > 1) | |
1868 | return (EBUSY); | |
1869 | } else { | |
1870 | if (vfsp->vfs_count > 2 || | |
1871 | zfsvfs->z_ctldir->v_count > 1) | |
1872 | return (EBUSY); | |
1873 | } | |
1874 | } | |
1875 | ||
1876 | vfsp->vfs_flag |= VFS_UNMOUNTED; | |
1877 | ||
1878 | VERIFY(zfsvfs_teardown(zfsvfs, B_TRUE) == 0); | |
1879 | os = zfsvfs->z_os; | |
1880 | ||
1881 | /* | |
1882 | * z_os will be NULL if there was an error in | |
1883 | * attempting to reopen zfsvfs. | |
1884 | */ | |
1885 | if (os != NULL) { | |
1886 | /* | |
1887 | * Unset the objset user_ptr. | |
1888 | */ | |
428870ff | 1889 | mutex_enter(&os->os_user_ptr_lock); |
34dc7c2f | 1890 | dmu_objset_set_user(os, NULL); |
428870ff | 1891 | mutex_exit(&os->os_user_ptr_lock); |
34dc7c2f BB |
1892 | |
1893 | /* | |
b128c09f | 1894 | * Finally release the objset |
34dc7c2f | 1895 | */ |
428870ff | 1896 | dmu_objset_disown(os, zfsvfs); |
34dc7c2f BB |
1897 | } |
1898 | ||
1899 | /* | |
1900 | * We can now safely destroy the '.zfs' directory node. | |
1901 | */ | |
1902 | if (zfsvfs->z_ctldir != NULL) | |
1903 | zfsctl_destroy(zfsvfs); | |
1904 | ||
1905 | return (0); | |
1906 | } | |
1907 | ||
1908 | static int | |
1909 | zfs_vget(vfs_t *vfsp, vnode_t **vpp, fid_t *fidp) | |
1910 | { | |
1911 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1912 | znode_t *zp; | |
1913 | uint64_t object = 0; | |
1914 | uint64_t fid_gen = 0; | |
1915 | uint64_t gen_mask; | |
1916 | uint64_t zp_gen; | |
1917 | int i, err; | |
1918 | ||
1919 | *vpp = NULL; | |
1920 | ||
1921 | ZFS_ENTER(zfsvfs); | |
1922 | ||
1923 | if (fidp->fid_len == LONG_FID_LEN) { | |
1924 | zfid_long_t *zlfid = (zfid_long_t *)fidp; | |
1925 | uint64_t objsetid = 0; | |
1926 | uint64_t setgen = 0; | |
1927 | ||
1928 | for (i = 0; i < sizeof (zlfid->zf_setid); i++) | |
1929 | objsetid |= ((uint64_t)zlfid->zf_setid[i]) << (8 * i); | |
1930 | ||
1931 | for (i = 0; i < sizeof (zlfid->zf_setgen); i++) | |
1932 | setgen |= ((uint64_t)zlfid->zf_setgen[i]) << (8 * i); | |
1933 | ||
1934 | ZFS_EXIT(zfsvfs); | |
1935 | ||
1936 | err = zfsctl_lookup_objset(vfsp, objsetid, &zfsvfs); | |
1937 | if (err) | |
1938 | return (EINVAL); | |
1939 | ZFS_ENTER(zfsvfs); | |
1940 | } | |
1941 | ||
1942 | if (fidp->fid_len == SHORT_FID_LEN || fidp->fid_len == LONG_FID_LEN) { | |
1943 | zfid_short_t *zfid = (zfid_short_t *)fidp; | |
1944 | ||
1945 | for (i = 0; i < sizeof (zfid->zf_object); i++) | |
1946 | object |= ((uint64_t)zfid->zf_object[i]) << (8 * i); | |
1947 | ||
1948 | for (i = 0; i < sizeof (zfid->zf_gen); i++) | |
1949 | fid_gen |= ((uint64_t)zfid->zf_gen[i]) << (8 * i); | |
1950 | } else { | |
1951 | ZFS_EXIT(zfsvfs); | |
1952 | return (EINVAL); | |
1953 | } | |
1954 | ||
1955 | /* A zero fid_gen means we are in the .zfs control directories */ | |
1956 | if (fid_gen == 0 && | |
1957 | (object == ZFSCTL_INO_ROOT || object == ZFSCTL_INO_SNAPDIR)) { | |
1958 | *vpp = zfsvfs->z_ctldir; | |
1959 | ASSERT(*vpp != NULL); | |
1960 | if (object == ZFSCTL_INO_SNAPDIR) { | |
1961 | VERIFY(zfsctl_root_lookup(*vpp, "snapshot", vpp, NULL, | |
1962 | 0, NULL, NULL, NULL, NULL, NULL) == 0); | |
1963 | } else { | |
1964 | VN_HOLD(*vpp); | |
1965 | } | |
1966 | ZFS_EXIT(zfsvfs); | |
1967 | return (0); | |
1968 | } | |
1969 | ||
1970 | gen_mask = -1ULL >> (64 - 8 * i); | |
1971 | ||
1972 | dprintf("getting %llu [%u mask %llx]\n", object, fid_gen, gen_mask); | |
149e873a | 1973 | if ((err = zfs_zget(zfsvfs, object, &zp))) { |
34dc7c2f BB |
1974 | ZFS_EXIT(zfsvfs); |
1975 | return (err); | |
1976 | } | |
428870ff BB |
1977 | (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), &zp_gen, |
1978 | sizeof (uint64_t)); | |
1979 | zp_gen = zp_gen & gen_mask; | |
34dc7c2f BB |
1980 | if (zp_gen == 0) |
1981 | zp_gen = 1; | |
1982 | if (zp->z_unlinked || zp_gen != fid_gen) { | |
1983 | dprintf("znode gen (%u) != fid gen (%u)\n", zp_gen, fid_gen); | |
1984 | VN_RELE(ZTOV(zp)); | |
1985 | ZFS_EXIT(zfsvfs); | |
1986 | return (EINVAL); | |
1987 | } | |
1988 | ||
1989 | *vpp = ZTOV(zp); | |
1990 | ZFS_EXIT(zfsvfs); | |
1991 | return (0); | |
1992 | } | |
1993 | ||
1994 | /* | |
1995 | * Block out VOPs and close zfsvfs_t::z_os | |
1996 | * | |
1997 | * Note, if successful, then we return with the 'z_teardown_lock' and | |
1998 | * 'z_teardown_inactive_lock' write held. | |
1999 | */ | |
2000 | int | |
428870ff | 2001 | zfs_suspend_fs(zfsvfs_t *zfsvfs) |
34dc7c2f BB |
2002 | { |
2003 | int error; | |
2004 | ||
2005 | if ((error = zfsvfs_teardown(zfsvfs, B_FALSE)) != 0) | |
2006 | return (error); | |
428870ff | 2007 | dmu_objset_disown(zfsvfs->z_os, zfsvfs); |
34dc7c2f BB |
2008 | |
2009 | return (0); | |
2010 | } | |
2011 | ||
2012 | /* | |
2013 | * Reopen zfsvfs_t::z_os and release VOPs. | |
2014 | */ | |
2015 | int | |
428870ff | 2016 | zfs_resume_fs(zfsvfs_t *zfsvfs, const char *osname) |
34dc7c2f | 2017 | { |
428870ff | 2018 | int err, err2; |
34dc7c2f BB |
2019 | |
2020 | ASSERT(RRW_WRITE_HELD(&zfsvfs->z_teardown_lock)); | |
2021 | ASSERT(RW_WRITE_HELD(&zfsvfs->z_teardown_inactive_lock)); | |
2022 | ||
428870ff BB |
2023 | err = dmu_objset_own(osname, DMU_OST_ZFS, B_FALSE, zfsvfs, |
2024 | &zfsvfs->z_os); | |
34dc7c2f BB |
2025 | if (err) { |
2026 | zfsvfs->z_os = NULL; | |
2027 | } else { | |
2028 | znode_t *zp; | |
428870ff BB |
2029 | uint64_t sa_obj = 0; |
2030 | ||
2031 | err2 = zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ, | |
2032 | ZFS_SA_ATTRS, 8, 1, &sa_obj); | |
2033 | ||
2034 | if ((err || err2) && zfsvfs->z_version >= ZPL_VERSION_SA) | |
2035 | goto bail; | |
2036 | ||
2037 | ||
572e2857 BB |
2038 | if ((err = sa_setup(zfsvfs->z_os, sa_obj, |
2039 | zfs_attr_table, ZPL_END, &zfsvfs->z_attr_table)) != 0) | |
2040 | goto bail; | |
34dc7c2f BB |
2041 | |
2042 | VERIFY(zfsvfs_setup(zfsvfs, B_FALSE) == 0); | |
2043 | ||
2044 | /* | |
2045 | * Attempt to re-establish all the active znodes with | |
2046 | * their dbufs. If a zfs_rezget() fails, then we'll let | |
2047 | * any potential callers discover that via ZFS_ENTER_VERIFY_VP | |
2048 | * when they try to use their znode. | |
2049 | */ | |
2050 | mutex_enter(&zfsvfs->z_znodes_lock); | |
2051 | for (zp = list_head(&zfsvfs->z_all_znodes); zp; | |
2052 | zp = list_next(&zfsvfs->z_all_znodes, zp)) { | |
2053 | (void) zfs_rezget(zp); | |
2054 | } | |
2055 | mutex_exit(&zfsvfs->z_znodes_lock); | |
2056 | ||
2057 | } | |
2058 | ||
428870ff | 2059 | bail: |
34dc7c2f BB |
2060 | /* release the VOPs */ |
2061 | rw_exit(&zfsvfs->z_teardown_inactive_lock); | |
2062 | rrw_exit(&zfsvfs->z_teardown_lock, FTAG); | |
2063 | ||
2064 | if (err) { | |
2065 | /* | |
2066 | * Since we couldn't reopen zfsvfs::z_os, force | |
2067 | * unmount this file system. | |
2068 | */ | |
2069 | if (vn_vfswlock(zfsvfs->z_vfs->vfs_vnodecovered) == 0) | |
2070 | (void) dounmount(zfsvfs->z_vfs, MS_FORCE, CRED()); | |
2071 | } | |
2072 | return (err); | |
2073 | } | |
2074 | ||
2075 | static void | |
2076 | zfs_freevfs(vfs_t *vfsp) | |
2077 | { | |
2078 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
34dc7c2f | 2079 | |
9babb374 BB |
2080 | /* |
2081 | * If this is a snapshot, we have an extra VFS_HOLD on our parent | |
428870ff BB |
2082 | * from zfs_mount(). Release it here. If we came through |
2083 | * zfs_mountroot() instead, we didn't grab an extra hold, so | |
2084 | * skip the VFS_RELE for rootvfs. | |
9babb374 | 2085 | */ |
428870ff | 2086 | if (zfsvfs->z_issnap && (vfsp != rootvfs)) |
9babb374 | 2087 | VFS_RELE(zfsvfs->z_parent->z_vfs); |
34dc7c2f | 2088 | |
9babb374 | 2089 | zfsvfs_free(zfsvfs); |
34dc7c2f BB |
2090 | |
2091 | atomic_add_32(&zfs_active_fs_count, -1); | |
2092 | } | |
2093 | ||
2094 | /* | |
2095 | * VFS_INIT() initialization. Note that there is no VFS_FINI(), | |
2096 | * so we can't safely do any non-idempotent initialization here. | |
2097 | * Leave that to zfs_init() and zfs_fini(), which are called | |
2098 | * from the module's _init() and _fini() entry points. | |
2099 | */ | |
2100 | /*ARGSUSED*/ | |
2101 | static int | |
2102 | zfs_vfsinit(int fstype, char *name) | |
2103 | { | |
2104 | int error; | |
2105 | ||
2106 | zfsfstype = fstype; | |
2107 | ||
2108 | /* | |
2109 | * Setup vfsops and vnodeops tables. | |
2110 | */ | |
2111 | error = vfs_setfsops(fstype, zfs_vfsops_template, &zfs_vfsops); | |
2112 | if (error != 0) { | |
2113 | cmn_err(CE_WARN, "zfs: bad vfs ops template"); | |
2114 | } | |
2115 | ||
2116 | error = zfs_create_op_tables(); | |
2117 | if (error) { | |
2118 | zfs_remove_op_tables(); | |
2119 | cmn_err(CE_WARN, "zfs: bad vnode ops template"); | |
2120 | (void) vfs_freevfsops_by_type(zfsfstype); | |
2121 | return (error); | |
2122 | } | |
2123 | ||
2124 | mutex_init(&zfs_dev_mtx, NULL, MUTEX_DEFAULT, NULL); | |
2125 | ||
2126 | /* | |
2127 | * Unique major number for all zfs mounts. | |
2128 | * If we run out of 32-bit minors, we'll getudev() another major. | |
2129 | */ | |
2130 | zfs_major = ddi_name_to_major(ZFS_DRIVER); | |
2131 | zfs_minor = ZFS_MIN_MINOR; | |
2132 | ||
2133 | return (0); | |
2134 | } | |
60101509 | 2135 | #endif /* HAVE_ZPL */ |
34dc7c2f BB |
2136 | |
2137 | void | |
2138 | zfs_init(void) | |
2139 | { | |
60101509 | 2140 | #ifdef HAVE_ZPL |
34dc7c2f BB |
2141 | /* |
2142 | * Initialize .zfs directory structures | |
2143 | */ | |
2144 | zfsctl_init(); | |
2145 | ||
2146 | /* | |
2147 | * Initialize znode cache, vnode ops, etc... | |
2148 | */ | |
2149 | zfs_znode_init(); | |
0151834d | 2150 | #endif /* HAVE_ZPL */ |
9babb374 BB |
2151 | |
2152 | dmu_objset_register_type(DMU_OST_ZFS, zfs_space_delta_cb); | |
34dc7c2f BB |
2153 | } |
2154 | ||
2155 | void | |
2156 | zfs_fini(void) | |
2157 | { | |
60101509 | 2158 | #ifdef HAVE_ZPL |
34dc7c2f BB |
2159 | zfsctl_fini(); |
2160 | zfs_znode_fini(); | |
60101509 | 2161 | #endif /* HAVE_ZPL */ |
34dc7c2f BB |
2162 | } |
2163 | ||
60101509 | 2164 | #ifdef HAVE_ZPL |
34dc7c2f | 2165 | int |
9babb374 | 2166 | zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers) |
34dc7c2f BB |
2167 | { |
2168 | int error; | |
9babb374 | 2169 | objset_t *os = zfsvfs->z_os; |
34dc7c2f | 2170 | dmu_tx_t *tx; |
34dc7c2f BB |
2171 | |
2172 | if (newvers < ZPL_VERSION_INITIAL || newvers > ZPL_VERSION) | |
2173 | return (EINVAL); | |
2174 | ||
9babb374 BB |
2175 | if (newvers < zfsvfs->z_version) |
2176 | return (EINVAL); | |
34dc7c2f | 2177 | |
428870ff BB |
2178 | if (zfs_spa_version_map(newvers) > |
2179 | spa_version(dmu_objset_spa(zfsvfs->z_os))) | |
2180 | return (ENOTSUP); | |
2181 | ||
34dc7c2f | 2182 | tx = dmu_tx_create(os); |
9babb374 | 2183 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_FALSE, ZPL_VERSION_STR); |
428870ff BB |
2184 | if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) { |
2185 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE, | |
2186 | ZFS_SA_ATTRS); | |
2187 | dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); | |
2188 | } | |
34dc7c2f BB |
2189 | error = dmu_tx_assign(tx, TXG_WAIT); |
2190 | if (error) { | |
2191 | dmu_tx_abort(tx); | |
9babb374 BB |
2192 | return (error); |
2193 | } | |
428870ff | 2194 | |
9babb374 BB |
2195 | error = zap_update(os, MASTER_NODE_OBJ, ZPL_VERSION_STR, |
2196 | 8, 1, &newvers, tx); | |
2197 | ||
2198 | if (error) { | |
2199 | dmu_tx_commit(tx); | |
2200 | return (error); | |
34dc7c2f | 2201 | } |
34dc7c2f | 2202 | |
428870ff BB |
2203 | if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) { |
2204 | uint64_t sa_obj; | |
2205 | ||
2206 | ASSERT3U(spa_version(dmu_objset_spa(zfsvfs->z_os)), >=, | |
2207 | SPA_VERSION_SA); | |
2208 | sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE, | |
2209 | DMU_OT_NONE, 0, tx); | |
2210 | ||
2211 | error = zap_add(os, MASTER_NODE_OBJ, | |
2212 | ZFS_SA_ATTRS, 8, 1, &sa_obj, tx); | |
2213 | ASSERT3U(error, ==, 0); | |
2214 | ||
2215 | VERIFY(0 == sa_set_sa_object(os, sa_obj)); | |
2216 | sa_register_update_callback(os, zfs_sa_upgrade); | |
2217 | } | |
2218 | ||
2219 | spa_history_log_internal(LOG_DS_UPGRADE, | |
2220 | dmu_objset_spa(os), tx, "oldver=%llu newver=%llu dataset = %llu", | |
9babb374 BB |
2221 | zfsvfs->z_version, newvers, dmu_objset_id(os)); |
2222 | ||
34dc7c2f BB |
2223 | dmu_tx_commit(tx); |
2224 | ||
9babb374 BB |
2225 | zfsvfs->z_version = newvers; |
2226 | ||
2227 | if (zfsvfs->z_version >= ZPL_VERSION_FUID) | |
2228 | zfs_set_fuid_feature(zfsvfs); | |
2229 | ||
2230 | return (0); | |
34dc7c2f | 2231 | } |
60101509 | 2232 | #endif /* HAVE_ZPL */ |
34dc7c2f BB |
2233 | |
2234 | /* | |
2235 | * Read a property stored within the master node. | |
2236 | */ | |
2237 | int | |
2238 | zfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value) | |
2239 | { | |
2240 | const char *pname; | |
b128c09f | 2241 | int error = ENOENT; |
34dc7c2f BB |
2242 | |
2243 | /* | |
2244 | * Look up the file system's value for the property. For the | |
2245 | * version property, we look up a slightly different string. | |
2246 | */ | |
2247 | if (prop == ZFS_PROP_VERSION) | |
2248 | pname = ZPL_VERSION_STR; | |
2249 | else | |
2250 | pname = zfs_prop_to_name(prop); | |
2251 | ||
b128c09f BB |
2252 | if (os != NULL) |
2253 | error = zap_lookup(os, MASTER_NODE_OBJ, pname, 8, 1, value); | |
34dc7c2f BB |
2254 | |
2255 | if (error == ENOENT) { | |
2256 | /* No value set, use the default value */ | |
2257 | switch (prop) { | |
2258 | case ZFS_PROP_VERSION: | |
2259 | *value = ZPL_VERSION; | |
2260 | break; | |
2261 | case ZFS_PROP_NORMALIZE: | |
2262 | case ZFS_PROP_UTF8ONLY: | |
2263 | *value = 0; | |
2264 | break; | |
2265 | case ZFS_PROP_CASE: | |
2266 | *value = ZFS_CASE_SENSITIVE; | |
2267 | break; | |
2268 | default: | |
2269 | return (error); | |
2270 | } | |
2271 | error = 0; | |
2272 | } | |
2273 | return (error); | |
2274 | } | |
2275 | ||
60101509 | 2276 | #ifdef HAVE_ZPL |
34dc7c2f BB |
2277 | static vfsdef_t vfw = { |
2278 | VFSDEF_VERSION, | |
2279 | MNTTYPE_ZFS, | |
2280 | zfs_vfsinit, | |
2281 | VSW_HASPROTO|VSW_CANRWRO|VSW_CANREMOUNT|VSW_VOLATILEDEV|VSW_STATS| | |
572e2857 | 2282 | VSW_XID|VSW_ZMOUNT, |
34dc7c2f BB |
2283 | &zfs_mntopts |
2284 | }; | |
2285 | ||
2286 | struct modlfs zfs_modlfs = { | |
2287 | &mod_fsops, "ZFS filesystem version " SPA_VERSION_STRING, &vfw | |
2288 | }; | |
60101509 | 2289 | #endif /* HAVE_ZPL */ |