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9f0a21e6 MM |
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 | |
1d3ba0bf | 9 | * or https://opensource.org/licenses/CDDL-1.0. |
9f0a21e6 MM |
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 | /* | |
22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
23 | * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>. | |
24 | * All rights reserved. | |
25 | * Copyright (c) 2012, 2015 by Delphix. All rights reserved. | |
26 | * Copyright (c) 2014 Integros [integros.com] | |
27 | * Copyright 2016 Nexenta Systems, Inc. All rights reserved. | |
28 | */ | |
29 | ||
30 | /* Portions Copyright 2010 Robert Milkowski */ | |
31 | ||
32 | #include <sys/types.h> | |
33 | #include <sys/param.h> | |
34 | #include <sys/systm.h> | |
35 | #include <sys/kernel.h> | |
36 | #include <sys/sysmacros.h> | |
37 | #include <sys/kmem.h> | |
38 | #include <sys/acl.h> | |
39 | #include <sys/vnode.h> | |
40 | #include <sys/vfs.h> | |
41 | #include <sys/mntent.h> | |
42 | #include <sys/mount.h> | |
43 | #include <sys/cmn_err.h> | |
44 | #include <sys/zfs_znode.h> | |
ab8c935e | 45 | #include <sys/zfs_vnops.h> |
9f0a21e6 MM |
46 | #include <sys/zfs_dir.h> |
47 | #include <sys/zil.h> | |
48 | #include <sys/fs/zfs.h> | |
49 | #include <sys/dmu.h> | |
50 | #include <sys/dsl_prop.h> | |
51 | #include <sys/dsl_dataset.h> | |
52 | #include <sys/dsl_deleg.h> | |
53 | #include <sys/spa.h> | |
54 | #include <sys/zap.h> | |
55 | #include <sys/sa.h> | |
56 | #include <sys/sa_impl.h> | |
57 | #include <sys/policy.h> | |
58 | #include <sys/atomic.h> | |
59 | #include <sys/zfs_ioctl.h> | |
60 | #include <sys/zfs_ctldir.h> | |
61 | #include <sys/zfs_fuid.h> | |
62 | #include <sys/sunddi.h> | |
63 | #include <sys/dmu_objset.h> | |
64 | #include <sys/dsl_dir.h> | |
9f0a21e6 | 65 | #include <sys/jail.h> |
595d3ac2 | 66 | #include <sys/osd.h> |
9f0a21e6 MM |
67 | #include <ufs/ufs/quota.h> |
68 | #include <sys/zfs_quota.h> | |
69 | ||
70 | #include "zfs_comutil.h" | |
71 | ||
72 | #ifndef MNTK_VMSETSIZE_BUG | |
73 | #define MNTK_VMSETSIZE_BUG 0 | |
74 | #endif | |
75 | #ifndef MNTK_NOMSYNC | |
76 | #define MNTK_NOMSYNC 8 | |
77 | #endif | |
78 | ||
9f0a21e6 MM |
79 | struct mtx zfs_debug_mtx; |
80 | MTX_SYSINIT(zfs_debug_mtx, &zfs_debug_mtx, "zfs_debug", MTX_DEF); | |
81 | ||
82 | SYSCTL_NODE(_vfs, OID_AUTO, zfs, CTLFLAG_RW, 0, "ZFS file system"); | |
83 | ||
84 | int zfs_super_owner; | |
85 | SYSCTL_INT(_vfs_zfs, OID_AUTO, super_owner, CTLFLAG_RW, &zfs_super_owner, 0, | |
7ada752a | 86 | "File system owners can perform privileged operation on file systems"); |
9f0a21e6 MM |
87 | |
88 | int zfs_debug_level; | |
89 | SYSCTL_INT(_vfs_zfs, OID_AUTO, debug, CTLFLAG_RWTUN, &zfs_debug_level, 0, | |
90 | "Debug level"); | |
91 | ||
595d3ac2 AJ |
92 | struct zfs_jailparam { |
93 | int mount_snapshot; | |
94 | }; | |
95 | ||
96 | static struct zfs_jailparam zfs_jailparam0 = { | |
97 | .mount_snapshot = 0, | |
98 | }; | |
99 | ||
100 | static int zfs_jailparam_slot; | |
101 | ||
102 | SYSCTL_JAIL_PARAM_SYS_NODE(zfs, CTLFLAG_RW, "Jail ZFS parameters"); | |
103 | SYSCTL_JAIL_PARAM(_zfs, mount_snapshot, CTLTYPE_INT | CTLFLAG_RW, "I", | |
104 | "Allow mounting snapshots in the .zfs directory for unjailed datasets"); | |
105 | ||
9f0a21e6 MM |
106 | SYSCTL_NODE(_vfs_zfs, OID_AUTO, version, CTLFLAG_RD, 0, "ZFS versions"); |
107 | static int zfs_version_acl = ZFS_ACL_VERSION; | |
108 | SYSCTL_INT(_vfs_zfs_version, OID_AUTO, acl, CTLFLAG_RD, &zfs_version_acl, 0, | |
7ada752a | 109 | "ZFS_ACL_VERSION"); |
9f0a21e6 MM |
110 | static int zfs_version_spa = SPA_VERSION; |
111 | SYSCTL_INT(_vfs_zfs_version, OID_AUTO, spa, CTLFLAG_RD, &zfs_version_spa, 0, | |
7ada752a | 112 | "SPA_VERSION"); |
9f0a21e6 MM |
113 | static int zfs_version_zpl = ZPL_VERSION; |
114 | SYSCTL_INT(_vfs_zfs_version, OID_AUTO, zpl, CTLFLAG_RD, &zfs_version_zpl, 0, | |
7ada752a | 115 | "ZPL_VERSION"); |
9f0a21e6 | 116 | |
8dddb25d JH |
117 | #if __FreeBSD_version >= 1400018 |
118 | static int zfs_quotactl(vfs_t *vfsp, int cmds, uid_t id, void *arg, | |
119 | bool *mp_busy); | |
120 | #else | |
9f0a21e6 | 121 | static int zfs_quotactl(vfs_t *vfsp, int cmds, uid_t id, void *arg); |
8dddb25d | 122 | #endif |
9f0a21e6 MM |
123 | static int zfs_mount(vfs_t *vfsp); |
124 | static int zfs_umount(vfs_t *vfsp, int fflag); | |
125 | static int zfs_root(vfs_t *vfsp, int flags, vnode_t **vpp); | |
126 | static int zfs_statfs(vfs_t *vfsp, struct statfs *statp); | |
127 | static int zfs_vget(vfs_t *vfsp, ino_t ino, int flags, vnode_t **vpp); | |
128 | static int zfs_sync(vfs_t *vfsp, int waitfor); | |
2e6af52b RM |
129 | #if __FreeBSD_version >= 1300098 |
130 | static int zfs_checkexp(vfs_t *vfsp, struct sockaddr *nam, uint64_t *extflagsp, | |
131 | struct ucred **credanonp, int *numsecflavors, int *secflavors); | |
132 | #else | |
9f0a21e6 MM |
133 | static int zfs_checkexp(vfs_t *vfsp, struct sockaddr *nam, int *extflagsp, |
134 | struct ucred **credanonp, int *numsecflavors, int **secflavors); | |
2e6af52b | 135 | #endif |
9f0a21e6 MM |
136 | static int zfs_fhtovp(vfs_t *vfsp, fid_t *fidp, int flags, vnode_t **vpp); |
137 | static void zfs_freevfs(vfs_t *vfsp); | |
138 | ||
139 | struct vfsops zfs_vfsops = { | |
140 | .vfs_mount = zfs_mount, | |
141 | .vfs_unmount = zfs_umount, | |
142 | #if __FreeBSD_version >= 1300049 | |
143 | .vfs_root = vfs_cache_root, | |
144 | .vfs_cachedroot = zfs_root, | |
145 | #else | |
146 | .vfs_root = zfs_root, | |
147 | #endif | |
148 | .vfs_statfs = zfs_statfs, | |
149 | .vfs_vget = zfs_vget, | |
150 | .vfs_sync = zfs_sync, | |
151 | .vfs_checkexp = zfs_checkexp, | |
152 | .vfs_fhtovp = zfs_fhtovp, | |
153 | .vfs_quotactl = zfs_quotactl, | |
154 | }; | |
155 | ||
156 | VFS_SET(zfs_vfsops, zfs, VFCF_JAIL | VFCF_DELEGADMIN); | |
157 | ||
158 | /* | |
159 | * We need to keep a count of active fs's. | |
160 | * This is necessary to prevent our module | |
161 | * from being unloaded after a umount -f | |
162 | */ | |
163 | static uint32_t zfs_active_fs_count = 0; | |
164 | ||
165 | int | |
166 | zfs_get_temporary_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop, uint64_t *val, | |
167 | char *setpoint) | |
168 | { | |
169 | int error; | |
170 | zfsvfs_t *zfvp; | |
171 | vfs_t *vfsp; | |
172 | objset_t *os; | |
173 | uint64_t tmp = *val; | |
174 | ||
175 | error = dmu_objset_from_ds(ds, &os); | |
176 | if (error != 0) | |
177 | return (error); | |
178 | ||
179 | error = getzfsvfs_impl(os, &zfvp); | |
180 | if (error != 0) | |
181 | return (error); | |
182 | if (zfvp == NULL) | |
183 | return (ENOENT); | |
184 | vfsp = zfvp->z_vfs; | |
185 | switch (zfs_prop) { | |
186 | case ZFS_PROP_ATIME: | |
187 | if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) | |
188 | tmp = 0; | |
189 | if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL)) | |
190 | tmp = 1; | |
191 | break; | |
192 | case ZFS_PROP_DEVICES: | |
193 | if (vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL)) | |
194 | tmp = 0; | |
195 | if (vfs_optionisset(vfsp, MNTOPT_DEVICES, NULL)) | |
196 | tmp = 1; | |
197 | break; | |
198 | case ZFS_PROP_EXEC: | |
199 | if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) | |
200 | tmp = 0; | |
201 | if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) | |
202 | tmp = 1; | |
203 | break; | |
204 | case ZFS_PROP_SETUID: | |
205 | if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) | |
206 | tmp = 0; | |
207 | if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) | |
208 | tmp = 1; | |
209 | break; | |
210 | case ZFS_PROP_READONLY: | |
211 | if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) | |
212 | tmp = 0; | |
213 | if (vfs_optionisset(vfsp, MNTOPT_RO, NULL)) | |
214 | tmp = 1; | |
215 | break; | |
216 | case ZFS_PROP_XATTR: | |
217 | if (zfvp->z_flags & ZSB_XATTR) | |
218 | tmp = zfvp->z_xattr; | |
219 | break; | |
220 | case ZFS_PROP_NBMAND: | |
221 | if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) | |
222 | tmp = 0; | |
223 | if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) | |
224 | tmp = 1; | |
225 | break; | |
226 | default: | |
227 | vfs_unbusy(vfsp); | |
228 | return (ENOENT); | |
229 | } | |
230 | ||
231 | vfs_unbusy(vfsp); | |
232 | if (tmp != *val) { | |
233 | (void) strcpy(setpoint, "temporary"); | |
234 | *val = tmp; | |
235 | } | |
236 | return (0); | |
237 | } | |
238 | ||
239 | static int | |
240 | zfs_getquota(zfsvfs_t *zfsvfs, uid_t id, int isgroup, struct dqblk64 *dqp) | |
241 | { | |
242 | int error = 0; | |
243 | char buf[32]; | |
244 | uint64_t usedobj, quotaobj; | |
245 | uint64_t quota, used = 0; | |
246 | timespec_t now; | |
247 | ||
248 | usedobj = isgroup ? DMU_GROUPUSED_OBJECT : DMU_USERUSED_OBJECT; | |
249 | quotaobj = isgroup ? zfsvfs->z_groupquota_obj : zfsvfs->z_userquota_obj; | |
250 | ||
251 | if (quotaobj == 0 || zfsvfs->z_replay) { | |
252 | error = ENOENT; | |
253 | goto done; | |
254 | } | |
255 | (void) sprintf(buf, "%llx", (longlong_t)id); | |
256 | if ((error = zap_lookup(zfsvfs->z_os, quotaobj, | |
257 | buf, sizeof (quota), 1, "a)) != 0) { | |
258 | dprintf("%s(%d): quotaobj lookup failed\n", | |
259 | __FUNCTION__, __LINE__); | |
260 | goto done; | |
261 | } | |
262 | /* | |
263 | * quota(8) uses bsoftlimit as "quoota", and hardlimit as "limit". | |
264 | * So we set them to be the same. | |
265 | */ | |
266 | dqp->dqb_bsoftlimit = dqp->dqb_bhardlimit = btodb(quota); | |
267 | error = zap_lookup(zfsvfs->z_os, usedobj, buf, sizeof (used), 1, &used); | |
268 | if (error && error != ENOENT) { | |
269 | dprintf("%s(%d): usedobj failed; %d\n", | |
270 | __FUNCTION__, __LINE__, error); | |
271 | goto done; | |
272 | } | |
273 | dqp->dqb_curblocks = btodb(used); | |
274 | dqp->dqb_ihardlimit = dqp->dqb_isoftlimit = 0; | |
275 | vfs_timestamp(&now); | |
276 | /* | |
277 | * Setting this to 0 causes FreeBSD quota(8) to print | |
278 | * the number of days since the epoch, which isn't | |
279 | * particularly useful. | |
280 | */ | |
281 | dqp->dqb_btime = dqp->dqb_itime = now.tv_sec; | |
282 | done: | |
283 | return (error); | |
284 | } | |
285 | ||
286 | static int | |
8dddb25d JH |
287 | #if __FreeBSD_version >= 1400018 |
288 | zfs_quotactl(vfs_t *vfsp, int cmds, uid_t id, void *arg, bool *mp_busy) | |
289 | #else | |
9f0a21e6 | 290 | zfs_quotactl(vfs_t *vfsp, int cmds, uid_t id, void *arg) |
8dddb25d | 291 | #endif |
9f0a21e6 MM |
292 | { |
293 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
294 | struct thread *td; | |
295 | int cmd, type, error = 0; | |
296 | int bitsize; | |
297 | zfs_userquota_prop_t quota_type; | |
298 | struct dqblk64 dqblk = { 0 }; | |
299 | ||
300 | td = curthread; | |
301 | cmd = cmds >> SUBCMDSHIFT; | |
302 | type = cmds & SUBCMDMASK; | |
303 | ||
768eaced CC |
304 | if ((error = zfs_enter(zfsvfs, FTAG)) != 0) |
305 | return (error); | |
9f0a21e6 MM |
306 | if (id == -1) { |
307 | switch (type) { | |
308 | case USRQUOTA: | |
309 | id = td->td_ucred->cr_ruid; | |
310 | break; | |
311 | case GRPQUOTA: | |
312 | id = td->td_ucred->cr_rgid; | |
313 | break; | |
314 | default: | |
315 | error = EINVAL; | |
8dddb25d | 316 | #if __FreeBSD_version < 1400018 |
9f0a21e6 MM |
317 | if (cmd == Q_QUOTAON || cmd == Q_QUOTAOFF) |
318 | vfs_unbusy(vfsp); | |
8dddb25d | 319 | #endif |
9f0a21e6 MM |
320 | goto done; |
321 | } | |
322 | } | |
323 | /* | |
324 | * Map BSD type to: | |
325 | * ZFS_PROP_USERUSED, | |
326 | * ZFS_PROP_USERQUOTA, | |
327 | * ZFS_PROP_GROUPUSED, | |
328 | * ZFS_PROP_GROUPQUOTA | |
329 | */ | |
330 | switch (cmd) { | |
331 | case Q_SETQUOTA: | |
332 | case Q_SETQUOTA32: | |
333 | if (type == USRQUOTA) | |
334 | quota_type = ZFS_PROP_USERQUOTA; | |
335 | else if (type == GRPQUOTA) | |
336 | quota_type = ZFS_PROP_GROUPQUOTA; | |
337 | else | |
338 | error = EINVAL; | |
339 | break; | |
340 | case Q_GETQUOTA: | |
341 | case Q_GETQUOTA32: | |
342 | if (type == USRQUOTA) | |
343 | quota_type = ZFS_PROP_USERUSED; | |
344 | else if (type == GRPQUOTA) | |
345 | quota_type = ZFS_PROP_GROUPUSED; | |
346 | else | |
347 | error = EINVAL; | |
348 | break; | |
349 | } | |
350 | ||
351 | /* | |
352 | * Depending on the cmd, we may need to get | |
353 | * the ruid and domain (see fuidstr_to_sid?), | |
354 | * the fuid (how?), or other information. | |
355 | * Create fuid using zfs_fuid_create(zfsvfs, id, | |
356 | * ZFS_OWNER or ZFS_GROUP, cr, &fuidp)? | |
357 | * I think I can use just the id? | |
358 | * | |
359 | * Look at zfs_id_overquota() to look up a quota. | |
360 | * zap_lookup(something, quotaobj, fuidstring, | |
361 | * sizeof (long long), 1, "a) | |
362 | * | |
363 | * See zfs_set_userquota() to set a quota. | |
364 | */ | |
365 | if ((uint32_t)type >= MAXQUOTAS) { | |
366 | error = EINVAL; | |
367 | goto done; | |
368 | } | |
369 | ||
370 | switch (cmd) { | |
371 | case Q_GETQUOTASIZE: | |
372 | bitsize = 64; | |
373 | error = copyout(&bitsize, arg, sizeof (int)); | |
374 | break; | |
375 | case Q_QUOTAON: | |
376 | // As far as I can tell, you can't turn quotas on or off on zfs | |
377 | error = 0; | |
8dddb25d | 378 | #if __FreeBSD_version < 1400018 |
9f0a21e6 | 379 | vfs_unbusy(vfsp); |
8dddb25d | 380 | #endif |
9f0a21e6 MM |
381 | break; |
382 | case Q_QUOTAOFF: | |
383 | error = ENOTSUP; | |
8dddb25d | 384 | #if __FreeBSD_version < 1400018 |
9f0a21e6 | 385 | vfs_unbusy(vfsp); |
8dddb25d | 386 | #endif |
9f0a21e6 MM |
387 | break; |
388 | case Q_SETQUOTA: | |
7b0e3903 | 389 | error = copyin(arg, &dqblk, sizeof (dqblk)); |
9f0a21e6 MM |
390 | if (error == 0) |
391 | error = zfs_set_userquota(zfsvfs, quota_type, | |
392 | "", id, dbtob(dqblk.dqb_bhardlimit)); | |
393 | break; | |
394 | case Q_GETQUOTA: | |
395 | error = zfs_getquota(zfsvfs, id, type == GRPQUOTA, &dqblk); | |
396 | if (error == 0) | |
397 | error = copyout(&dqblk, arg, sizeof (dqblk)); | |
398 | break; | |
399 | default: | |
400 | error = EINVAL; | |
401 | break; | |
402 | } | |
403 | done: | |
768eaced | 404 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
405 | return (error); |
406 | } | |
407 | ||
408 | ||
409 | boolean_t | |
410 | zfs_is_readonly(zfsvfs_t *zfsvfs) | |
411 | { | |
412 | return (!!(zfsvfs->z_vfs->vfs_flag & VFS_RDONLY)); | |
413 | } | |
414 | ||
9f0a21e6 MM |
415 | static int |
416 | zfs_sync(vfs_t *vfsp, int waitfor) | |
417 | { | |
418 | ||
419 | /* | |
420 | * Data integrity is job one. We don't want a compromised kernel | |
421 | * writing to the storage pool, so we never sync during panic. | |
422 | */ | |
423 | if (panicstr) | |
424 | return (0); | |
425 | ||
426 | /* | |
427 | * Ignore the system syncher. ZFS already commits async data | |
428 | * at zfs_txg_timeout intervals. | |
429 | */ | |
430 | if (waitfor == MNT_LAZY) | |
431 | return (0); | |
432 | ||
433 | if (vfsp != NULL) { | |
434 | /* | |
435 | * Sync a specific filesystem. | |
436 | */ | |
437 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
438 | dsl_pool_t *dp; | |
439 | int error; | |
440 | ||
768eaced CC |
441 | if ((error = zfs_enter(zfsvfs, FTAG)) != 0) |
442 | return (error); | |
9f0a21e6 MM |
443 | dp = dmu_objset_pool(zfsvfs->z_os); |
444 | ||
445 | /* | |
446 | * If the system is shutting down, then skip any | |
447 | * filesystems which may exist on a suspended pool. | |
448 | */ | |
449 | if (rebooting && spa_suspended(dp->dp_spa)) { | |
768eaced | 450 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
451 | return (0); |
452 | } | |
453 | ||
454 | if (zfsvfs->z_log != NULL) | |
455 | zil_commit(zfsvfs->z_log, 0); | |
456 | ||
768eaced | 457 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
458 | } else { |
459 | /* | |
460 | * Sync all ZFS filesystems. This is what happens when you | |
76d04993 | 461 | * run sync(8). Unlike other filesystems, ZFS honors the |
9f0a21e6 MM |
462 | * request by waiting for all pools to commit all dirty data. |
463 | */ | |
464 | spa_sync_allpools(); | |
465 | } | |
466 | ||
467 | return (0); | |
468 | } | |
469 | ||
470 | static void | |
471 | atime_changed_cb(void *arg, uint64_t newval) | |
472 | { | |
473 | zfsvfs_t *zfsvfs = arg; | |
474 | ||
475 | if (newval == TRUE) { | |
476 | zfsvfs->z_atime = TRUE; | |
477 | zfsvfs->z_vfs->vfs_flag &= ~MNT_NOATIME; | |
478 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME); | |
479 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_ATIME, NULL, 0); | |
480 | } else { | |
481 | zfsvfs->z_atime = FALSE; | |
482 | zfsvfs->z_vfs->vfs_flag |= MNT_NOATIME; | |
483 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_ATIME); | |
484 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOATIME, NULL, 0); | |
485 | } | |
486 | } | |
487 | ||
488 | static void | |
489 | xattr_changed_cb(void *arg, uint64_t newval) | |
490 | { | |
491 | zfsvfs_t *zfsvfs = arg; | |
492 | ||
493 | if (newval == ZFS_XATTR_OFF) { | |
494 | zfsvfs->z_flags &= ~ZSB_XATTR; | |
495 | } else { | |
496 | zfsvfs->z_flags |= ZSB_XATTR; | |
497 | ||
498 | if (newval == ZFS_XATTR_SA) | |
499 | zfsvfs->z_xattr_sa = B_TRUE; | |
500 | else | |
501 | zfsvfs->z_xattr_sa = B_FALSE; | |
502 | } | |
503 | } | |
504 | ||
505 | static void | |
506 | blksz_changed_cb(void *arg, uint64_t newval) | |
507 | { | |
508 | zfsvfs_t *zfsvfs = arg; | |
509 | ASSERT3U(newval, <=, spa_maxblocksize(dmu_objset_spa(zfsvfs->z_os))); | |
510 | ASSERT3U(newval, >=, SPA_MINBLOCKSIZE); | |
511 | ASSERT(ISP2(newval)); | |
512 | ||
513 | zfsvfs->z_max_blksz = newval; | |
514 | zfsvfs->z_vfs->mnt_stat.f_iosize = newval; | |
515 | } | |
516 | ||
517 | static void | |
518 | readonly_changed_cb(void *arg, uint64_t newval) | |
519 | { | |
520 | zfsvfs_t *zfsvfs = arg; | |
521 | ||
522 | if (newval) { | |
523 | /* XXX locking on vfs_flag? */ | |
524 | zfsvfs->z_vfs->vfs_flag |= VFS_RDONLY; | |
525 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RW); | |
526 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RO, NULL, 0); | |
527 | } else { | |
528 | /* XXX locking on vfs_flag? */ | |
529 | zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; | |
530 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_RO); | |
531 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_RW, NULL, 0); | |
532 | } | |
533 | } | |
534 | ||
535 | static void | |
536 | setuid_changed_cb(void *arg, uint64_t newval) | |
537 | { | |
538 | zfsvfs_t *zfsvfs = arg; | |
539 | ||
540 | if (newval == FALSE) { | |
541 | zfsvfs->z_vfs->vfs_flag |= VFS_NOSETUID; | |
542 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_SETUID); | |
543 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID, NULL, 0); | |
544 | } else { | |
545 | zfsvfs->z_vfs->vfs_flag &= ~VFS_NOSETUID; | |
546 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOSETUID); | |
547 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_SETUID, NULL, 0); | |
548 | } | |
549 | } | |
550 | ||
551 | static void | |
552 | exec_changed_cb(void *arg, uint64_t newval) | |
553 | { | |
554 | zfsvfs_t *zfsvfs = arg; | |
555 | ||
556 | if (newval == FALSE) { | |
557 | zfsvfs->z_vfs->vfs_flag |= VFS_NOEXEC; | |
558 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_EXEC); | |
559 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC, NULL, 0); | |
560 | } else { | |
561 | zfsvfs->z_vfs->vfs_flag &= ~VFS_NOEXEC; | |
562 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NOEXEC); | |
563 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_EXEC, NULL, 0); | |
564 | } | |
565 | } | |
566 | ||
567 | /* | |
568 | * The nbmand mount option can be changed at mount time. | |
569 | * We can't allow it to be toggled on live file systems or incorrect | |
570 | * behavior may be seen from cifs clients | |
571 | * | |
572 | * This property isn't registered via dsl_prop_register(), but this callback | |
573 | * will be called when a file system is first mounted | |
574 | */ | |
575 | static void | |
576 | nbmand_changed_cb(void *arg, uint64_t newval) | |
577 | { | |
578 | zfsvfs_t *zfsvfs = arg; | |
579 | if (newval == FALSE) { | |
580 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND); | |
581 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND, NULL, 0); | |
582 | } else { | |
583 | vfs_clearmntopt(zfsvfs->z_vfs, MNTOPT_NONBMAND); | |
584 | vfs_setmntopt(zfsvfs->z_vfs, MNTOPT_NBMAND, NULL, 0); | |
585 | } | |
586 | } | |
587 | ||
588 | static void | |
589 | snapdir_changed_cb(void *arg, uint64_t newval) | |
590 | { | |
591 | zfsvfs_t *zfsvfs = arg; | |
592 | ||
593 | zfsvfs->z_show_ctldir = newval; | |
594 | } | |
595 | ||
9f0a21e6 MM |
596 | static void |
597 | acl_mode_changed_cb(void *arg, uint64_t newval) | |
598 | { | |
599 | zfsvfs_t *zfsvfs = arg; | |
600 | ||
601 | zfsvfs->z_acl_mode = newval; | |
602 | } | |
603 | ||
604 | static void | |
605 | acl_inherit_changed_cb(void *arg, uint64_t newval) | |
606 | { | |
607 | zfsvfs_t *zfsvfs = arg; | |
608 | ||
609 | zfsvfs->z_acl_inherit = newval; | |
610 | } | |
611 | ||
485b50bb RM |
612 | static void |
613 | acl_type_changed_cb(void *arg, uint64_t newval) | |
614 | { | |
615 | zfsvfs_t *zfsvfs = arg; | |
616 | ||
617 | zfsvfs->z_acl_type = newval; | |
618 | } | |
619 | ||
9f0a21e6 MM |
620 | static int |
621 | zfs_register_callbacks(vfs_t *vfsp) | |
622 | { | |
623 | struct dsl_dataset *ds = NULL; | |
624 | objset_t *os = NULL; | |
625 | zfsvfs_t *zfsvfs = NULL; | |
626 | uint64_t nbmand; | |
627 | boolean_t readonly = B_FALSE; | |
628 | boolean_t do_readonly = B_FALSE; | |
629 | boolean_t setuid = B_FALSE; | |
630 | boolean_t do_setuid = B_FALSE; | |
631 | boolean_t exec = B_FALSE; | |
632 | boolean_t do_exec = B_FALSE; | |
633 | boolean_t xattr = B_FALSE; | |
634 | boolean_t atime = B_FALSE; | |
635 | boolean_t do_atime = B_FALSE; | |
636 | boolean_t do_xattr = B_FALSE; | |
637 | int error = 0; | |
638 | ||
e4efb709 | 639 | ASSERT3P(vfsp, !=, NULL); |
9f0a21e6 | 640 | zfsvfs = vfsp->vfs_data; |
e4efb709 | 641 | ASSERT3P(zfsvfs, !=, NULL); |
9f0a21e6 MM |
642 | os = zfsvfs->z_os; |
643 | ||
644 | /* | |
645 | * This function can be called for a snapshot when we update snapshot's | |
646 | * mount point, which isn't really supported. | |
647 | */ | |
648 | if (dmu_objset_is_snapshot(os)) | |
649 | return (EOPNOTSUPP); | |
650 | ||
651 | /* | |
652 | * The act of registering our callbacks will destroy any mount | |
653 | * options we may have. In order to enable temporary overrides | |
654 | * of mount options, we stash away the current values and | |
655 | * restore them after we register the callbacks. | |
656 | */ | |
657 | if (vfs_optionisset(vfsp, MNTOPT_RO, NULL) || | |
658 | !spa_writeable(dmu_objset_spa(os))) { | |
659 | readonly = B_TRUE; | |
660 | do_readonly = B_TRUE; | |
661 | } else if (vfs_optionisset(vfsp, MNTOPT_RW, NULL)) { | |
662 | readonly = B_FALSE; | |
663 | do_readonly = B_TRUE; | |
664 | } | |
665 | if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) { | |
666 | setuid = B_FALSE; | |
667 | do_setuid = B_TRUE; | |
668 | } else if (vfs_optionisset(vfsp, MNTOPT_SETUID, NULL)) { | |
669 | setuid = B_TRUE; | |
670 | do_setuid = B_TRUE; | |
671 | } | |
672 | if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) { | |
673 | exec = B_FALSE; | |
674 | do_exec = B_TRUE; | |
675 | } else if (vfs_optionisset(vfsp, MNTOPT_EXEC, NULL)) { | |
676 | exec = B_TRUE; | |
677 | do_exec = B_TRUE; | |
678 | } | |
679 | if (vfs_optionisset(vfsp, MNTOPT_NOXATTR, NULL)) { | |
680 | zfsvfs->z_xattr = xattr = ZFS_XATTR_OFF; | |
681 | do_xattr = B_TRUE; | |
682 | } else if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL)) { | |
683 | zfsvfs->z_xattr = xattr = ZFS_XATTR_DIR; | |
684 | do_xattr = B_TRUE; | |
685 | } else if (vfs_optionisset(vfsp, MNTOPT_DIRXATTR, NULL)) { | |
686 | zfsvfs->z_xattr = xattr = ZFS_XATTR_DIR; | |
687 | do_xattr = B_TRUE; | |
688 | } else if (vfs_optionisset(vfsp, MNTOPT_SAXATTR, NULL)) { | |
689 | zfsvfs->z_xattr = xattr = ZFS_XATTR_SA; | |
690 | do_xattr = B_TRUE; | |
691 | } | |
692 | if (vfs_optionisset(vfsp, MNTOPT_NOATIME, NULL)) { | |
693 | atime = B_FALSE; | |
694 | do_atime = B_TRUE; | |
695 | } else if (vfs_optionisset(vfsp, MNTOPT_ATIME, NULL)) { | |
696 | atime = B_TRUE; | |
697 | do_atime = B_TRUE; | |
698 | } | |
699 | ||
700 | /* | |
701 | * We need to enter pool configuration here, so that we can use | |
702 | * dsl_prop_get_int_ds() to handle the special nbmand property below. | |
703 | * dsl_prop_get_integer() can not be used, because it has to acquire | |
704 | * spa_namespace_lock and we can not do that because we already hold | |
705 | * z_teardown_lock. The problem is that spa_write_cachefile() is called | |
706 | * with spa_namespace_lock held and the function calls ZFS vnode | |
707 | * operations to write the cache file and thus z_teardown_lock is | |
708 | * acquired after spa_namespace_lock. | |
709 | */ | |
710 | ds = dmu_objset_ds(os); | |
711 | dsl_pool_config_enter(dmu_objset_pool(os), FTAG); | |
712 | ||
713 | /* | |
714 | * nbmand is a special property. It can only be changed at | |
715 | * mount time. | |
716 | * | |
717 | * This is weird, but it is documented to only be changeable | |
718 | * at mount time. | |
719 | */ | |
720 | if (vfs_optionisset(vfsp, MNTOPT_NONBMAND, NULL)) { | |
721 | nbmand = B_FALSE; | |
722 | } else if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) { | |
723 | nbmand = B_TRUE; | |
724 | } else if ((error = dsl_prop_get_int_ds(ds, "nbmand", &nbmand) != 0)) { | |
725 | dsl_pool_config_exit(dmu_objset_pool(os), FTAG); | |
726 | return (error); | |
727 | } | |
728 | ||
729 | /* | |
730 | * Register property callbacks. | |
731 | * | |
732 | * It would probably be fine to just check for i/o error from | |
733 | * the first prop_register(), but I guess I like to go | |
734 | * overboard... | |
735 | */ | |
736 | error = dsl_prop_register(ds, | |
737 | zfs_prop_to_name(ZFS_PROP_ATIME), atime_changed_cb, zfsvfs); | |
738 | error = error ? error : dsl_prop_register(ds, | |
739 | zfs_prop_to_name(ZFS_PROP_XATTR), xattr_changed_cb, zfsvfs); | |
740 | error = error ? error : dsl_prop_register(ds, | |
741 | zfs_prop_to_name(ZFS_PROP_RECORDSIZE), blksz_changed_cb, zfsvfs); | |
742 | error = error ? error : dsl_prop_register(ds, | |
743 | zfs_prop_to_name(ZFS_PROP_READONLY), readonly_changed_cb, zfsvfs); | |
744 | error = error ? error : dsl_prop_register(ds, | |
745 | zfs_prop_to_name(ZFS_PROP_SETUID), setuid_changed_cb, zfsvfs); | |
746 | error = error ? error : dsl_prop_register(ds, | |
747 | zfs_prop_to_name(ZFS_PROP_EXEC), exec_changed_cb, zfsvfs); | |
748 | error = error ? error : dsl_prop_register(ds, | |
749 | zfs_prop_to_name(ZFS_PROP_SNAPDIR), snapdir_changed_cb, zfsvfs); | |
485b50bb RM |
750 | error = error ? error : dsl_prop_register(ds, |
751 | zfs_prop_to_name(ZFS_PROP_ACLTYPE), acl_type_changed_cb, zfsvfs); | |
9f0a21e6 MM |
752 | error = error ? error : dsl_prop_register(ds, |
753 | zfs_prop_to_name(ZFS_PROP_ACLMODE), acl_mode_changed_cb, zfsvfs); | |
754 | error = error ? error : dsl_prop_register(ds, | |
755 | zfs_prop_to_name(ZFS_PROP_ACLINHERIT), acl_inherit_changed_cb, | |
756 | zfsvfs); | |
9f0a21e6 MM |
757 | dsl_pool_config_exit(dmu_objset_pool(os), FTAG); |
758 | if (error) | |
759 | goto unregister; | |
760 | ||
761 | /* | |
762 | * Invoke our callbacks to restore temporary mount options. | |
763 | */ | |
764 | if (do_readonly) | |
765 | readonly_changed_cb(zfsvfs, readonly); | |
766 | if (do_setuid) | |
767 | setuid_changed_cb(zfsvfs, setuid); | |
768 | if (do_exec) | |
769 | exec_changed_cb(zfsvfs, exec); | |
770 | if (do_xattr) | |
771 | xattr_changed_cb(zfsvfs, xattr); | |
772 | if (do_atime) | |
773 | atime_changed_cb(zfsvfs, atime); | |
774 | ||
775 | nbmand_changed_cb(zfsvfs, nbmand); | |
776 | ||
777 | return (0); | |
778 | ||
779 | unregister: | |
780 | dsl_prop_unregister_all(ds, zfsvfs); | |
781 | return (error); | |
782 | } | |
783 | ||
784 | /* | |
785 | * Associate this zfsvfs with the given objset, which must be owned. | |
786 | * This will cache a bunch of on-disk state from the objset in the | |
787 | * zfsvfs. | |
788 | */ | |
789 | static int | |
790 | zfsvfs_init(zfsvfs_t *zfsvfs, objset_t *os) | |
791 | { | |
792 | int error; | |
793 | uint64_t val; | |
794 | ||
795 | zfsvfs->z_max_blksz = SPA_OLD_MAXBLOCKSIZE; | |
796 | zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE; | |
797 | zfsvfs->z_os = os; | |
798 | ||
799 | error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zfsvfs->z_version); | |
800 | if (error != 0) | |
801 | return (error); | |
802 | if (zfsvfs->z_version > | |
803 | zfs_zpl_version_map(spa_version(dmu_objset_spa(os)))) { | |
804 | (void) printf("Can't mount a version %lld file system " | |
805 | "on a version %lld pool\n. Pool must be upgraded to mount " | |
806 | "this file system.", (u_longlong_t)zfsvfs->z_version, | |
807 | (u_longlong_t)spa_version(dmu_objset_spa(os))); | |
808 | return (SET_ERROR(ENOTSUP)); | |
809 | } | |
810 | error = zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &val); | |
811 | if (error != 0) | |
812 | return (error); | |
813 | zfsvfs->z_norm = (int)val; | |
814 | ||
815 | error = zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &val); | |
816 | if (error != 0) | |
817 | return (error); | |
818 | zfsvfs->z_utf8 = (val != 0); | |
819 | ||
820 | error = zfs_get_zplprop(os, ZFS_PROP_CASE, &val); | |
821 | if (error != 0) | |
822 | return (error); | |
823 | zfsvfs->z_case = (uint_t)val; | |
824 | ||
485b50bb RM |
825 | error = zfs_get_zplprop(os, ZFS_PROP_ACLTYPE, &val); |
826 | if (error != 0) | |
827 | return (error); | |
828 | zfsvfs->z_acl_type = (uint_t)val; | |
829 | ||
9f0a21e6 MM |
830 | /* |
831 | * Fold case on file systems that are always or sometimes case | |
832 | * insensitive. | |
833 | */ | |
834 | if (zfsvfs->z_case == ZFS_CASE_INSENSITIVE || | |
835 | zfsvfs->z_case == ZFS_CASE_MIXED) | |
836 | zfsvfs->z_norm |= U8_TEXTPREP_TOUPPER; | |
837 | ||
838 | zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); | |
839 | zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); | |
840 | ||
841 | uint64_t sa_obj = 0; | |
842 | if (zfsvfs->z_use_sa) { | |
843 | /* should either have both of these objects or none */ | |
844 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, | |
845 | &sa_obj); | |
846 | if (error != 0) | |
847 | return (error); | |
210231ed RM |
848 | |
849 | error = zfs_get_zplprop(os, ZFS_PROP_XATTR, &val); | |
850 | if (error == 0 && val == ZFS_XATTR_SA) | |
851 | zfsvfs->z_xattr_sa = B_TRUE; | |
9f0a21e6 MM |
852 | } |
853 | ||
854 | error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END, | |
855 | &zfsvfs->z_attr_table); | |
856 | if (error != 0) | |
857 | return (error); | |
858 | ||
859 | if (zfsvfs->z_version >= ZPL_VERSION_SA) | |
860 | sa_register_update_callback(os, zfs_sa_upgrade); | |
861 | ||
862 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ, 8, 1, | |
863 | &zfsvfs->z_root); | |
864 | if (error != 0) | |
865 | return (error); | |
e4efb709 | 866 | ASSERT3U(zfsvfs->z_root, !=, 0); |
9f0a21e6 MM |
867 | |
868 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET, 8, 1, | |
869 | &zfsvfs->z_unlinkedobj); | |
870 | if (error != 0) | |
871 | return (error); | |
872 | ||
873 | error = zap_lookup(os, MASTER_NODE_OBJ, | |
874 | zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA], | |
875 | 8, 1, &zfsvfs->z_userquota_obj); | |
876 | if (error == ENOENT) | |
877 | zfsvfs->z_userquota_obj = 0; | |
878 | else if (error != 0) | |
879 | return (error); | |
880 | ||
881 | error = zap_lookup(os, MASTER_NODE_OBJ, | |
882 | zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA], | |
883 | 8, 1, &zfsvfs->z_groupquota_obj); | |
884 | if (error == ENOENT) | |
885 | zfsvfs->z_groupquota_obj = 0; | |
886 | else if (error != 0) | |
887 | return (error); | |
888 | ||
889 | error = zap_lookup(os, MASTER_NODE_OBJ, | |
890 | zfs_userquota_prop_prefixes[ZFS_PROP_PROJECTQUOTA], | |
891 | 8, 1, &zfsvfs->z_projectquota_obj); | |
892 | if (error == ENOENT) | |
893 | zfsvfs->z_projectquota_obj = 0; | |
894 | else if (error != 0) | |
895 | return (error); | |
896 | ||
897 | error = zap_lookup(os, MASTER_NODE_OBJ, | |
898 | zfs_userquota_prop_prefixes[ZFS_PROP_USEROBJQUOTA], | |
899 | 8, 1, &zfsvfs->z_userobjquota_obj); | |
900 | if (error == ENOENT) | |
901 | zfsvfs->z_userobjquota_obj = 0; | |
902 | else if (error != 0) | |
903 | return (error); | |
904 | ||
905 | error = zap_lookup(os, MASTER_NODE_OBJ, | |
906 | zfs_userquota_prop_prefixes[ZFS_PROP_GROUPOBJQUOTA], | |
907 | 8, 1, &zfsvfs->z_groupobjquota_obj); | |
908 | if (error == ENOENT) | |
909 | zfsvfs->z_groupobjquota_obj = 0; | |
910 | else if (error != 0) | |
911 | return (error); | |
912 | ||
913 | error = zap_lookup(os, MASTER_NODE_OBJ, | |
914 | zfs_userquota_prop_prefixes[ZFS_PROP_PROJECTOBJQUOTA], | |
915 | 8, 1, &zfsvfs->z_projectobjquota_obj); | |
916 | if (error == ENOENT) | |
917 | zfsvfs->z_projectobjquota_obj = 0; | |
918 | else if (error != 0) | |
919 | return (error); | |
920 | ||
921 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_FUID_TABLES, 8, 1, | |
922 | &zfsvfs->z_fuid_obj); | |
923 | if (error == ENOENT) | |
924 | zfsvfs->z_fuid_obj = 0; | |
925 | else if (error != 0) | |
926 | return (error); | |
927 | ||
928 | error = zap_lookup(os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1, | |
929 | &zfsvfs->z_shares_dir); | |
930 | if (error == ENOENT) | |
931 | zfsvfs->z_shares_dir = 0; | |
932 | else if (error != 0) | |
933 | return (error); | |
934 | ||
935 | /* | |
936 | * Only use the name cache if we are looking for a | |
937 | * name on a file system that does not require normalization | |
938 | * or case folding. We can also look there if we happen to be | |
939 | * on a non-normalizing, mixed sensitivity file system IF we | |
940 | * are looking for the exact name (which is always the case on | |
941 | * FreeBSD). | |
942 | */ | |
943 | zfsvfs->z_use_namecache = !zfsvfs->z_norm || | |
944 | ((zfsvfs->z_case == ZFS_CASE_MIXED) && | |
945 | !(zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER)); | |
946 | ||
947 | return (0); | |
948 | } | |
949 | ||
950 | taskq_t *zfsvfs_taskq; | |
951 | ||
952 | static void | |
953 | zfsvfs_task_unlinked_drain(void *context, int pending __unused) | |
954 | { | |
955 | ||
956 | zfs_unlinked_drain((zfsvfs_t *)context); | |
957 | } | |
958 | ||
959 | int | |
960 | zfsvfs_create(const char *osname, boolean_t readonly, zfsvfs_t **zfvp) | |
961 | { | |
962 | objset_t *os; | |
963 | zfsvfs_t *zfsvfs; | |
964 | int error; | |
965 | boolean_t ro = (readonly || (strchr(osname, '@') != NULL)); | |
966 | ||
967 | /* | |
968 | * XXX: Fix struct statfs so this isn't necessary! | |
969 | * | |
970 | * The 'osname' is used as the filesystem's special node, which means | |
971 | * it must fit in statfs.f_mntfromname, or else it can't be | |
972 | * enumerated, so libzfs_mnttab_find() returns NULL, which causes | |
973 | * 'zfs unmount' to think it's not mounted when it is. | |
974 | */ | |
975 | if (strlen(osname) >= MNAMELEN) | |
976 | return (SET_ERROR(ENAMETOOLONG)); | |
977 | ||
978 | zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); | |
979 | ||
980 | error = dmu_objset_own(osname, DMU_OST_ZFS, ro, B_TRUE, zfsvfs, | |
981 | &os); | |
982 | if (error != 0) { | |
983 | kmem_free(zfsvfs, sizeof (zfsvfs_t)); | |
984 | return (error); | |
985 | } | |
986 | ||
987 | error = zfsvfs_create_impl(zfvp, zfsvfs, os); | |
988 | ||
989 | return (error); | |
990 | } | |
991 | ||
992 | ||
993 | int | |
994 | zfsvfs_create_impl(zfsvfs_t **zfvp, zfsvfs_t *zfsvfs, objset_t *os) | |
995 | { | |
996 | int error; | |
997 | ||
998 | zfsvfs->z_vfs = NULL; | |
999 | zfsvfs->z_parent = zfsvfs; | |
1000 | ||
1001 | mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); | |
1002 | mutex_init(&zfsvfs->z_lock, NULL, MUTEX_DEFAULT, NULL); | |
1003 | list_create(&zfsvfs->z_all_znodes, sizeof (znode_t), | |
1004 | offsetof(znode_t, z_link_node)); | |
1005 | TASK_INIT(&zfsvfs->z_unlinked_drain_task, 0, | |
1006 | zfsvfs_task_unlinked_drain, zfsvfs); | |
5ebe425a | 1007 | ZFS_TEARDOWN_INIT(zfsvfs); |
9847f77f | 1008 | ZFS_TEARDOWN_INACTIVE_INIT(zfsvfs); |
9f0a21e6 MM |
1009 | rw_init(&zfsvfs->z_fuid_lock, NULL, RW_DEFAULT, NULL); |
1010 | for (int i = 0; i != ZFS_OBJ_MTX_SZ; i++) | |
1011 | mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); | |
1012 | ||
1013 | error = zfsvfs_init(zfsvfs, os); | |
1014 | if (error != 0) { | |
1015 | dmu_objset_disown(os, B_TRUE, zfsvfs); | |
1016 | *zfvp = NULL; | |
1017 | kmem_free(zfsvfs, sizeof (zfsvfs_t)); | |
1018 | return (error); | |
1019 | } | |
1020 | ||
1021 | *zfvp = zfsvfs; | |
1022 | return (0); | |
1023 | } | |
1024 | ||
1025 | static int | |
1026 | zfsvfs_setup(zfsvfs_t *zfsvfs, boolean_t mounting) | |
1027 | { | |
1028 | int error; | |
1029 | ||
1030 | /* | |
1031 | * Check for a bad on-disk format version now since we | |
1032 | * lied about owning the dataset readonly before. | |
1033 | */ | |
1034 | if (!(zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) && | |
1035 | dmu_objset_incompatible_encryption_version(zfsvfs->z_os)) | |
1036 | return (SET_ERROR(EROFS)); | |
1037 | ||
1038 | error = zfs_register_callbacks(zfsvfs->z_vfs); | |
1039 | if (error) | |
1040 | return (error); | |
1041 | ||
9f0a21e6 MM |
1042 | /* |
1043 | * If we are not mounting (ie: online recv), then we don't | |
1044 | * have to worry about replaying the log as we blocked all | |
1045 | * operations out since we closed the ZIL. | |
1046 | */ | |
1047 | if (mounting) { | |
1048 | boolean_t readonly; | |
1049 | ||
4547fc4e | 1050 | ASSERT3P(zfsvfs->z_kstat.dk_kstats, ==, NULL); |
fb087146 AH |
1051 | error = dataset_kstats_create(&zfsvfs->z_kstat, zfsvfs->z_os); |
1052 | if (error) | |
1053 | return (error); | |
1054 | zfsvfs->z_log = zil_open(zfsvfs->z_os, zfs_get_data, | |
1055 | &zfsvfs->z_kstat.dk_zil_sums); | |
4547fc4e | 1056 | |
9f0a21e6 MM |
1057 | /* |
1058 | * During replay we remove the read only flag to | |
1059 | * allow replays to succeed. | |
1060 | */ | |
1061 | readonly = zfsvfs->z_vfs->vfs_flag & VFS_RDONLY; | |
1062 | if (readonly != 0) { | |
1063 | zfsvfs->z_vfs->vfs_flag &= ~VFS_RDONLY; | |
1064 | } else { | |
1065 | dsl_dir_t *dd; | |
4547fc4e AJ |
1066 | zap_stats_t zs; |
1067 | ||
1068 | if (zap_get_stats(zfsvfs->z_os, zfsvfs->z_unlinkedobj, | |
1069 | &zs) == 0) { | |
1070 | dataset_kstats_update_nunlinks_kstat( | |
1071 | &zfsvfs->z_kstat, zs.zs_num_entries); | |
1072 | dprintf_ds(zfsvfs->z_os->os_dsl_dataset, | |
1073 | "num_entries in unlinked set: %llu", | |
8e739b2c | 1074 | (u_longlong_t)zs.zs_num_entries); |
4547fc4e | 1075 | } |
9f0a21e6 MM |
1076 | |
1077 | zfs_unlinked_drain(zfsvfs); | |
1078 | dd = zfsvfs->z_os->os_dsl_dataset->ds_dir; | |
1079 | dd->dd_activity_cancelled = B_FALSE; | |
1080 | } | |
1081 | ||
1082 | /* | |
1083 | * Parse and replay the intent log. | |
1084 | * | |
1085 | * Because of ziltest, this must be done after | |
1086 | * zfs_unlinked_drain(). (Further note: ziltest | |
1087 | * doesn't use readonly mounts, where | |
1088 | * zfs_unlinked_drain() isn't called.) This is because | |
1089 | * ziltest causes spa_sync() to think it's committed, | |
1090 | * but actually it is not, so the intent log contains | |
1091 | * many txg's worth of changes. | |
1092 | * | |
1093 | * In particular, if object N is in the unlinked set in | |
1094 | * the last txg to actually sync, then it could be | |
1095 | * actually freed in a later txg and then reallocated | |
1096 | * in a yet later txg. This would write a "create | |
1097 | * object N" record to the intent log. Normally, this | |
1098 | * would be fine because the spa_sync() would have | |
1099 | * written out the fact that object N is free, before | |
1100 | * we could write the "create object N" intent log | |
1101 | * record. | |
1102 | * | |
1103 | * But when we are in ziltest mode, we advance the "open | |
1104 | * txg" without actually spa_sync()-ing the changes to | |
1105 | * disk. So we would see that object N is still | |
1106 | * allocated and in the unlinked set, and there is an | |
1107 | * intent log record saying to allocate it. | |
1108 | */ | |
1109 | if (spa_writeable(dmu_objset_spa(zfsvfs->z_os))) { | |
1110 | if (zil_replay_disable) { | |
1111 | zil_destroy(zfsvfs->z_log, B_FALSE); | |
1112 | } else { | |
1113 | boolean_t use_nc = zfsvfs->z_use_namecache; | |
1114 | zfsvfs->z_use_namecache = B_FALSE; | |
1115 | zfsvfs->z_replay = B_TRUE; | |
1116 | zil_replay(zfsvfs->z_os, zfsvfs, | |
1117 | zfs_replay_vector); | |
1118 | zfsvfs->z_replay = B_FALSE; | |
1119 | zfsvfs->z_use_namecache = use_nc; | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | /* restore readonly bit */ | |
1124 | if (readonly != 0) | |
1125 | zfsvfs->z_vfs->vfs_flag |= VFS_RDONLY; | |
fb087146 AH |
1126 | } else { |
1127 | ASSERT3P(zfsvfs->z_kstat.dk_kstats, !=, NULL); | |
1128 | zfsvfs->z_log = zil_open(zfsvfs->z_os, zfs_get_data, | |
1129 | &zfsvfs->z_kstat.dk_zil_sums); | |
9f0a21e6 MM |
1130 | } |
1131 | ||
1132 | /* | |
1133 | * Set the objset user_ptr to track its zfsvfs. | |
1134 | */ | |
1135 | mutex_enter(&zfsvfs->z_os->os_user_ptr_lock); | |
1136 | dmu_objset_set_user(zfsvfs->z_os, zfsvfs); | |
1137 | mutex_exit(&zfsvfs->z_os->os_user_ptr_lock); | |
1138 | ||
1139 | return (0); | |
1140 | } | |
1141 | ||
9f0a21e6 MM |
1142 | void |
1143 | zfsvfs_free(zfsvfs_t *zfsvfs) | |
1144 | { | |
1145 | int i; | |
1146 | ||
9f0a21e6 MM |
1147 | zfs_fuid_destroy(zfsvfs); |
1148 | ||
1149 | mutex_destroy(&zfsvfs->z_znodes_lock); | |
1150 | mutex_destroy(&zfsvfs->z_lock); | |
e4efb709 | 1151 | ASSERT3U(zfsvfs->z_nr_znodes, ==, 0); |
9f0a21e6 | 1152 | list_destroy(&zfsvfs->z_all_znodes); |
5ebe425a | 1153 | ZFS_TEARDOWN_DESTROY(zfsvfs); |
9847f77f | 1154 | ZFS_TEARDOWN_INACTIVE_DESTROY(zfsvfs); |
9f0a21e6 MM |
1155 | rw_destroy(&zfsvfs->z_fuid_lock); |
1156 | for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) | |
1157 | mutex_destroy(&zfsvfs->z_hold_mtx[i]); | |
4547fc4e | 1158 | dataset_kstats_destroy(&zfsvfs->z_kstat); |
9f0a21e6 MM |
1159 | kmem_free(zfsvfs, sizeof (zfsvfs_t)); |
1160 | } | |
1161 | ||
1162 | static void | |
1163 | zfs_set_fuid_feature(zfsvfs_t *zfsvfs) | |
1164 | { | |
1165 | zfsvfs->z_use_fuids = USE_FUIDS(zfsvfs->z_version, zfsvfs->z_os); | |
9f0a21e6 MM |
1166 | zfsvfs->z_use_sa = USE_SA(zfsvfs->z_version, zfsvfs->z_os); |
1167 | } | |
1168 | ||
1169 | static int | |
1170 | zfs_domount(vfs_t *vfsp, char *osname) | |
1171 | { | |
1172 | uint64_t recordsize, fsid_guid; | |
1173 | int error = 0; | |
1174 | zfsvfs_t *zfsvfs; | |
1175 | ||
e4efb709 RM |
1176 | ASSERT3P(vfsp, !=, NULL); |
1177 | ASSERT3P(osname, !=, NULL); | |
9f0a21e6 MM |
1178 | |
1179 | error = zfsvfs_create(osname, vfsp->mnt_flag & MNT_RDONLY, &zfsvfs); | |
1180 | if (error) | |
1181 | return (error); | |
1182 | zfsvfs->z_vfs = vfsp; | |
1183 | ||
1184 | if ((error = dsl_prop_get_integer(osname, | |
1185 | "recordsize", &recordsize, NULL))) | |
1186 | goto out; | |
1187 | zfsvfs->z_vfs->vfs_bsize = SPA_MINBLOCKSIZE; | |
1188 | zfsvfs->z_vfs->mnt_stat.f_iosize = recordsize; | |
1189 | ||
1190 | vfsp->vfs_data = zfsvfs; | |
1191 | vfsp->mnt_flag |= MNT_LOCAL; | |
1192 | vfsp->mnt_kern_flag |= MNTK_LOOKUP_SHARED; | |
1193 | vfsp->mnt_kern_flag |= MNTK_SHARED_WRITES; | |
1194 | vfsp->mnt_kern_flag |= MNTK_EXTENDED_SHARED; | |
1195 | /* | |
1196 | * This can cause a loss of coherence between ARC and page cache | |
1197 | * on ZoF - unclear if the problem is in FreeBSD or ZoF | |
1198 | */ | |
1199 | vfsp->mnt_kern_flag |= MNTK_NO_IOPF; /* vn_io_fault can be used */ | |
1200 | vfsp->mnt_kern_flag |= MNTK_NOMSYNC; | |
1201 | vfsp->mnt_kern_flag |= MNTK_VMSETSIZE_BUG; | |
1202 | ||
1b376d17 MM |
1203 | #if defined(_KERNEL) && !defined(KMEM_DEBUG) |
1204 | vfsp->mnt_kern_flag |= MNTK_FPLOOKUP; | |
1205 | #endif | |
9f0a21e6 MM |
1206 | /* |
1207 | * The fsid is 64 bits, composed of an 8-bit fs type, which | |
1208 | * separates our fsid from any other filesystem types, and a | |
1209 | * 56-bit objset unique ID. The objset unique ID is unique to | |
1210 | * all objsets open on this system, provided by unique_create(). | |
1211 | * The 8-bit fs type must be put in the low bits of fsid[1] | |
1212 | * because that's where other Solaris filesystems put it. | |
1213 | */ | |
1214 | fsid_guid = dmu_objset_fsid_guid(zfsvfs->z_os); | |
e4efb709 | 1215 | ASSERT3U((fsid_guid & ~((1ULL << 56) - 1)), ==, 0); |
9f0a21e6 | 1216 | vfsp->vfs_fsid.val[0] = fsid_guid; |
e4efb709 | 1217 | vfsp->vfs_fsid.val[1] = ((fsid_guid >> 32) << 8) | |
9f0a21e6 MM |
1218 | (vfsp->mnt_vfc->vfc_typenum & 0xFF); |
1219 | ||
1220 | /* | |
1221 | * Set features for file system. | |
1222 | */ | |
1223 | zfs_set_fuid_feature(zfsvfs); | |
9f0a21e6 MM |
1224 | |
1225 | if (dmu_objset_is_snapshot(zfsvfs->z_os)) { | |
1226 | uint64_t pval; | |
1227 | ||
1228 | atime_changed_cb(zfsvfs, B_FALSE); | |
1229 | readonly_changed_cb(zfsvfs, B_TRUE); | |
1230 | if ((error = dsl_prop_get_integer(osname, | |
1231 | "xattr", &pval, NULL))) | |
1232 | goto out; | |
1233 | xattr_changed_cb(zfsvfs, pval); | |
485b50bb RM |
1234 | if ((error = dsl_prop_get_integer(osname, |
1235 | "acltype", &pval, NULL))) | |
1236 | goto out; | |
1237 | acl_type_changed_cb(zfsvfs, pval); | |
9f0a21e6 MM |
1238 | zfsvfs->z_issnap = B_TRUE; |
1239 | zfsvfs->z_os->os_sync = ZFS_SYNC_DISABLED; | |
1240 | ||
1241 | mutex_enter(&zfsvfs->z_os->os_user_ptr_lock); | |
1242 | dmu_objset_set_user(zfsvfs->z_os, zfsvfs); | |
1243 | mutex_exit(&zfsvfs->z_os->os_user_ptr_lock); | |
1244 | } else { | |
1245 | if ((error = zfsvfs_setup(zfsvfs, B_TRUE))) | |
1246 | goto out; | |
1247 | } | |
1248 | ||
1249 | vfs_mountedfrom(vfsp, osname); | |
1250 | ||
1251 | if (!zfsvfs->z_issnap) | |
1252 | zfsctl_create(zfsvfs); | |
1253 | out: | |
1254 | if (error) { | |
1255 | dmu_objset_disown(zfsvfs->z_os, B_TRUE, zfsvfs); | |
1256 | zfsvfs_free(zfsvfs); | |
1257 | } else { | |
1258 | atomic_inc_32(&zfs_active_fs_count); | |
1259 | } | |
1260 | ||
1261 | return (error); | |
1262 | } | |
1263 | ||
65c7cc49 | 1264 | static void |
9f0a21e6 MM |
1265 | zfs_unregister_callbacks(zfsvfs_t *zfsvfs) |
1266 | { | |
1267 | objset_t *os = zfsvfs->z_os; | |
1268 | ||
1269 | if (!dmu_objset_is_snapshot(os)) | |
1270 | dsl_prop_unregister_all(dmu_objset_ds(os), zfsvfs); | |
1271 | } | |
1272 | ||
9f0a21e6 MM |
1273 | static int |
1274 | getpoolname(const char *osname, char *poolname) | |
1275 | { | |
1276 | char *p; | |
1277 | ||
1278 | p = strchr(osname, '/'); | |
1279 | if (p == NULL) { | |
1280 | if (strlen(osname) >= MAXNAMELEN) | |
1281 | return (ENAMETOOLONG); | |
1282 | (void) strcpy(poolname, osname); | |
1283 | } else { | |
1284 | if (p - osname >= MAXNAMELEN) | |
1285 | return (ENAMETOOLONG); | |
7584fbe8 | 1286 | (void) strlcpy(poolname, osname, p - osname + 1); |
9f0a21e6 MM |
1287 | } |
1288 | return (0); | |
1289 | } | |
1290 | ||
e464f7c7 MZ |
1291 | static void |
1292 | fetch_osname_options(char *name, bool *checkpointrewind) | |
1293 | { | |
1294 | ||
1295 | if (name[0] == '!') { | |
1296 | *checkpointrewind = true; | |
1297 | memmove(name, name + 1, strlen(name)); | |
1298 | } else { | |
1299 | *checkpointrewind = false; | |
1300 | } | |
1301 | } | |
1302 | ||
9f0a21e6 MM |
1303 | static int |
1304 | zfs_mount(vfs_t *vfsp) | |
1305 | { | |
1306 | kthread_t *td = curthread; | |
1307 | vnode_t *mvp = vfsp->mnt_vnodecovered; | |
1308 | cred_t *cr = td->td_ucred; | |
1309 | char *osname; | |
1310 | int error = 0; | |
1311 | int canwrite; | |
595d3ac2 | 1312 | bool checkpointrewind, isctlsnap = false; |
9f0a21e6 MM |
1313 | |
1314 | if (vfs_getopt(vfsp->mnt_optnew, "from", (void **)&osname, NULL)) | |
1315 | return (SET_ERROR(EINVAL)); | |
1316 | ||
1317 | /* | |
1318 | * If full-owner-access is enabled and delegated administration is | |
1319 | * turned on, we must set nosuid. | |
1320 | */ | |
1321 | if (zfs_super_owner && | |
1322 | dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr) != ECANCELED) { | |
1323 | secpolicy_fs_mount_clearopts(cr, vfsp); | |
1324 | } | |
1325 | ||
e464f7c7 | 1326 | fetch_osname_options(osname, &checkpointrewind); |
d27a0028 AJ |
1327 | isctlsnap = (mvp != NULL && zfsctl_is_node(mvp) && |
1328 | strchr(osname, '@') != NULL); | |
e464f7c7 | 1329 | |
9f0a21e6 MM |
1330 | /* |
1331 | * Check for mount privilege? | |
1332 | * | |
1333 | * If we don't have privilege then see if | |
1334 | * we have local permission to allow it | |
1335 | */ | |
1336 | error = secpolicy_fs_mount(cr, mvp, vfsp); | |
595d3ac2 AJ |
1337 | if (error && isctlsnap) { |
1338 | secpolicy_fs_mount_clearopts(cr, vfsp); | |
1339 | } else if (error) { | |
9f0a21e6 MM |
1340 | if (dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr) != 0) |
1341 | goto out; | |
1342 | ||
1343 | if (!(vfsp->vfs_flag & MS_REMOUNT)) { | |
1344 | vattr_t vattr; | |
1345 | ||
1346 | /* | |
1347 | * Make sure user is the owner of the mount point | |
1348 | * or has sufficient privileges. | |
1349 | */ | |
1350 | ||
1351 | vattr.va_mask = AT_UID; | |
1352 | ||
1353 | vn_lock(mvp, LK_SHARED | LK_RETRY); | |
1354 | if (VOP_GETATTR(mvp, &vattr, cr)) { | |
1355 | VOP_UNLOCK1(mvp); | |
1356 | goto out; | |
1357 | } | |
1358 | ||
1359 | if (secpolicy_vnode_owner(mvp, cr, vattr.va_uid) != 0 && | |
1360 | VOP_ACCESS(mvp, VWRITE, cr, td) != 0) { | |
1361 | VOP_UNLOCK1(mvp); | |
1362 | goto out; | |
1363 | } | |
1364 | VOP_UNLOCK1(mvp); | |
1365 | } | |
1366 | ||
1367 | secpolicy_fs_mount_clearopts(cr, vfsp); | |
1368 | } | |
1369 | ||
1370 | /* | |
1371 | * Refuse to mount a filesystem if we are in a local zone and the | |
1372 | * dataset is not visible. | |
1373 | */ | |
1374 | if (!INGLOBALZONE(curproc) && | |
1375 | (!zone_dataset_visible(osname, &canwrite) || !canwrite)) { | |
595d3ac2 AJ |
1376 | boolean_t mount_snapshot = B_FALSE; |
1377 | ||
1378 | /* | |
1379 | * Snapshots may be mounted in .zfs for unjailed datasets | |
1380 | * if allowed by the jail param zfs.mount_snapshot. | |
1381 | */ | |
1382 | if (isctlsnap) { | |
1383 | struct prison *pr; | |
1384 | struct zfs_jailparam *zjp; | |
1385 | ||
1386 | pr = curthread->td_ucred->cr_prison; | |
1387 | mtx_lock(&pr->pr_mtx); | |
1388 | zjp = osd_jail_get(pr, zfs_jailparam_slot); | |
1389 | mtx_unlock(&pr->pr_mtx); | |
1390 | if (zjp && zjp->mount_snapshot) | |
1391 | mount_snapshot = B_TRUE; | |
1392 | } | |
1393 | if (!mount_snapshot) { | |
1394 | error = SET_ERROR(EPERM); | |
1395 | goto out; | |
1396 | } | |
9f0a21e6 MM |
1397 | } |
1398 | ||
9f0a21e6 MM |
1399 | vfsp->vfs_flag |= MNT_NFS4ACLS; |
1400 | ||
1401 | /* | |
1402 | * When doing a remount, we simply refresh our temporary properties | |
1403 | * according to those options set in the current VFS options. | |
1404 | */ | |
1405 | if (vfsp->vfs_flag & MS_REMOUNT) { | |
1406 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1407 | ||
1408 | /* | |
1409 | * Refresh mount options with z_teardown_lock blocking I/O while | |
1410 | * the filesystem is in an inconsistent state. | |
1411 | * The lock also serializes this code with filesystem | |
1412 | * manipulations between entry to zfs_suspend_fs() and return | |
1413 | * from zfs_resume_fs(). | |
1414 | */ | |
5ebe425a | 1415 | ZFS_TEARDOWN_ENTER_WRITE(zfsvfs, FTAG); |
9f0a21e6 MM |
1416 | zfs_unregister_callbacks(zfsvfs); |
1417 | error = zfs_register_callbacks(vfsp); | |
5ebe425a | 1418 | ZFS_TEARDOWN_EXIT(zfsvfs, FTAG); |
9f0a21e6 MM |
1419 | goto out; |
1420 | } | |
1421 | ||
1422 | /* Initial root mount: try hard to import the requested root pool. */ | |
1423 | if ((vfsp->vfs_flag & MNT_ROOTFS) != 0 && | |
1424 | (vfsp->vfs_flag & MNT_UPDATE) == 0) { | |
1425 | char pname[MAXNAMELEN]; | |
1426 | ||
1427 | error = getpoolname(osname, pname); | |
1428 | if (error == 0) | |
e464f7c7 | 1429 | error = spa_import_rootpool(pname, checkpointrewind); |
9f0a21e6 MM |
1430 | if (error) |
1431 | goto out; | |
1432 | } | |
1433 | DROP_GIANT(); | |
1434 | error = zfs_domount(vfsp, osname); | |
1435 | PICKUP_GIANT(); | |
1436 | ||
1437 | out: | |
1438 | return (error); | |
1439 | } | |
1440 | ||
1441 | static int | |
1442 | zfs_statfs(vfs_t *vfsp, struct statfs *statp) | |
1443 | { | |
1444 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1445 | uint64_t refdbytes, availbytes, usedobjs, availobjs; | |
768eaced | 1446 | int error; |
9f0a21e6 MM |
1447 | |
1448 | statp->f_version = STATFS_VERSION; | |
1449 | ||
768eaced CC |
1450 | if ((error = zfs_enter(zfsvfs, FTAG)) != 0) |
1451 | return (error); | |
9f0a21e6 MM |
1452 | |
1453 | dmu_objset_space(zfsvfs->z_os, | |
1454 | &refdbytes, &availbytes, &usedobjs, &availobjs); | |
1455 | ||
1456 | /* | |
1457 | * The underlying storage pool actually uses multiple block sizes. | |
1458 | * We report the fragsize as the smallest block size we support, | |
1459 | * and we report our blocksize as the filesystem's maximum blocksize. | |
1460 | */ | |
1461 | statp->f_bsize = SPA_MINBLOCKSIZE; | |
1462 | statp->f_iosize = zfsvfs->z_vfs->mnt_stat.f_iosize; | |
1463 | ||
1464 | /* | |
1465 | * The following report "total" blocks of various kinds in the | |
1466 | * file system, but reported in terms of f_frsize - the | |
1467 | * "fragment" size. | |
1468 | */ | |
1469 | ||
1470 | statp->f_blocks = (refdbytes + availbytes) >> SPA_MINBLOCKSHIFT; | |
1471 | statp->f_bfree = availbytes / statp->f_bsize; | |
1472 | statp->f_bavail = statp->f_bfree; /* no root reservation */ | |
1473 | ||
1474 | /* | |
1475 | * statvfs() should really be called statufs(), because it assumes | |
1476 | * static metadata. ZFS doesn't preallocate files, so the best | |
1477 | * we can do is report the max that could possibly fit in f_files, | |
1478 | * and that minus the number actually used in f_ffree. | |
1479 | * For f_ffree, report the smaller of the number of object available | |
1480 | * and the number of blocks (each object will take at least a block). | |
1481 | */ | |
1482 | statp->f_ffree = MIN(availobjs, statp->f_bfree); | |
1483 | statp->f_files = statp->f_ffree + usedobjs; | |
1484 | ||
1485 | /* | |
1486 | * We're a zfs filesystem. | |
1487 | */ | |
1488 | strlcpy(statp->f_fstypename, "zfs", | |
1489 | sizeof (statp->f_fstypename)); | |
1490 | ||
1491 | strlcpy(statp->f_mntfromname, vfsp->mnt_stat.f_mntfromname, | |
1492 | sizeof (statp->f_mntfromname)); | |
1493 | strlcpy(statp->f_mntonname, vfsp->mnt_stat.f_mntonname, | |
1494 | sizeof (statp->f_mntonname)); | |
1495 | ||
1496 | statp->f_namemax = MAXNAMELEN - 1; | |
1497 | ||
768eaced | 1498 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
1499 | return (0); |
1500 | } | |
1501 | ||
1502 | static int | |
1503 | zfs_root(vfs_t *vfsp, int flags, vnode_t **vpp) | |
1504 | { | |
1505 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1506 | znode_t *rootzp; | |
1507 | int error; | |
1508 | ||
768eaced CC |
1509 | if ((error = zfs_enter(zfsvfs, FTAG)) != 0) |
1510 | return (error); | |
9f0a21e6 MM |
1511 | |
1512 | error = zfs_zget(zfsvfs, zfsvfs->z_root, &rootzp); | |
1513 | if (error == 0) | |
1514 | *vpp = ZTOV(rootzp); | |
1515 | ||
768eaced | 1516 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
1517 | |
1518 | if (error == 0) { | |
1519 | error = vn_lock(*vpp, flags); | |
1520 | if (error != 0) { | |
1521 | VN_RELE(*vpp); | |
1522 | *vpp = NULL; | |
1523 | } | |
1524 | } | |
1525 | return (error); | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * Teardown the zfsvfs::z_os. | |
1530 | * | |
1531 | * Note, if 'unmounting' is FALSE, we return with the 'z_teardown_lock' | |
1532 | * and 'z_teardown_inactive_lock' held. | |
1533 | */ | |
1534 | static int | |
1535 | zfsvfs_teardown(zfsvfs_t *zfsvfs, boolean_t unmounting) | |
1536 | { | |
1537 | znode_t *zp; | |
1538 | dsl_dir_t *dd; | |
1539 | ||
1540 | /* | |
1541 | * If someone has not already unmounted this file system, | |
1542 | * drain the zrele_taskq to ensure all active references to the | |
1543 | * zfsvfs_t have been handled only then can it be safely destroyed. | |
1544 | */ | |
1545 | if (zfsvfs->z_os) { | |
1546 | /* | |
1547 | * If we're unmounting we have to wait for the list to | |
1548 | * drain completely. | |
1549 | * | |
1550 | * If we're not unmounting there's no guarantee the list | |
1551 | * will drain completely, but zreles run from the taskq | |
1552 | * may add the parents of dir-based xattrs to the taskq | |
1553 | * so we want to wait for these. | |
1554 | * | |
1555 | * We can safely read z_nr_znodes without locking because the | |
1556 | * VFS has already blocked operations which add to the | |
1557 | * z_all_znodes list and thus increment z_nr_znodes. | |
1558 | */ | |
1559 | int round = 0; | |
1560 | while (zfsvfs->z_nr_znodes > 0) { | |
1561 | taskq_wait_outstanding(dsl_pool_zrele_taskq( | |
1562 | dmu_objset_pool(zfsvfs->z_os)), 0); | |
1563 | if (++round > 1 && !unmounting) | |
1564 | break; | |
1565 | } | |
1566 | } | |
5ebe425a | 1567 | ZFS_TEARDOWN_ENTER_WRITE(zfsvfs, FTAG); |
9f0a21e6 MM |
1568 | |
1569 | if (!unmounting) { | |
1570 | /* | |
1571 | * We purge the parent filesystem's vfsp as the parent | |
1572 | * filesystem and all of its snapshots have their vnode's | |
1573 | * v_vfsp set to the parent's filesystem's vfsp. Note, | |
1574 | * 'z_parent' is self referential for non-snapshots. | |
1575 | */ | |
1576 | #ifdef FREEBSD_NAMECACHE | |
f6bb7c02 MG |
1577 | #if __FreeBSD_version >= 1300117 |
1578 | cache_purgevfs(zfsvfs->z_parent->z_vfs); | |
1579 | #else | |
9f0a21e6 | 1580 | cache_purgevfs(zfsvfs->z_parent->z_vfs, true); |
f6bb7c02 | 1581 | #endif |
9f0a21e6 MM |
1582 | #endif |
1583 | } | |
1584 | ||
1585 | /* | |
1586 | * Close the zil. NB: Can't close the zil while zfs_inactive | |
1587 | * threads are blocked as zil_close can call zfs_inactive. | |
1588 | */ | |
1589 | if (zfsvfs->z_log) { | |
1590 | zil_close(zfsvfs->z_log); | |
1591 | zfsvfs->z_log = NULL; | |
1592 | } | |
1593 | ||
9847f77f | 1594 | ZFS_TEARDOWN_INACTIVE_ENTER_WRITE(zfsvfs); |
9f0a21e6 MM |
1595 | |
1596 | /* | |
1597 | * If we are not unmounting (ie: online recv) and someone already | |
1598 | * unmounted this file system while we were doing the switcheroo, | |
1599 | * or a reopen of z_os failed then just bail out now. | |
1600 | */ | |
1601 | if (!unmounting && (zfsvfs->z_unmounted || zfsvfs->z_os == NULL)) { | |
9847f77f | 1602 | ZFS_TEARDOWN_INACTIVE_EXIT_WRITE(zfsvfs); |
5ebe425a | 1603 | ZFS_TEARDOWN_EXIT(zfsvfs, FTAG); |
9f0a21e6 MM |
1604 | return (SET_ERROR(EIO)); |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * At this point there are no vops active, and any new vops will | |
1609 | * fail with EIO since we have z_teardown_lock for writer (only | |
dd4bc569 | 1610 | * relevant for forced unmount). |
9f0a21e6 MM |
1611 | * |
1612 | * Release all holds on dbufs. | |
1613 | */ | |
1614 | mutex_enter(&zfsvfs->z_znodes_lock); | |
1615 | for (zp = list_head(&zfsvfs->z_all_znodes); zp != NULL; | |
e4efb709 RM |
1616 | zp = list_next(&zfsvfs->z_all_znodes, zp)) { |
1617 | if (zp->z_sa_hdl != NULL) { | |
9f0a21e6 MM |
1618 | zfs_znode_dmu_fini(zp); |
1619 | } | |
e4efb709 | 1620 | } |
9f0a21e6 MM |
1621 | mutex_exit(&zfsvfs->z_znodes_lock); |
1622 | ||
1623 | /* | |
1624 | * If we are unmounting, set the unmounted flag and let new vops | |
1625 | * unblock. zfs_inactive will have the unmounted behavior, and all | |
1626 | * other vops will fail with EIO. | |
1627 | */ | |
1628 | if (unmounting) { | |
1629 | zfsvfs->z_unmounted = B_TRUE; | |
9847f77f | 1630 | ZFS_TEARDOWN_INACTIVE_EXIT_WRITE(zfsvfs); |
5ebe425a | 1631 | ZFS_TEARDOWN_EXIT(zfsvfs, FTAG); |
9f0a21e6 MM |
1632 | } |
1633 | ||
1634 | /* | |
1635 | * z_os will be NULL if there was an error in attempting to reopen | |
1636 | * zfsvfs, so just return as the properties had already been | |
1637 | * unregistered and cached data had been evicted before. | |
1638 | */ | |
1639 | if (zfsvfs->z_os == NULL) | |
1640 | return (0); | |
1641 | ||
1642 | /* | |
1643 | * Unregister properties. | |
1644 | */ | |
1645 | zfs_unregister_callbacks(zfsvfs); | |
1646 | ||
1647 | /* | |
1648 | * Evict cached data | |
1649 | */ | |
1650 | if (!zfs_is_readonly(zfsvfs)) | |
1651 | txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0); | |
1652 | dmu_objset_evict_dbufs(zfsvfs->z_os); | |
1653 | dd = zfsvfs->z_os->os_dsl_dataset->ds_dir; | |
1654 | dsl_dir_cancel_waiters(dd); | |
1655 | ||
1656 | return (0); | |
1657 | } | |
1658 | ||
9f0a21e6 MM |
1659 | static int |
1660 | zfs_umount(vfs_t *vfsp, int fflag) | |
1661 | { | |
1662 | kthread_t *td = curthread; | |
1663 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1664 | objset_t *os; | |
1665 | cred_t *cr = td->td_ucred; | |
1666 | int ret; | |
1667 | ||
1668 | ret = secpolicy_fs_unmount(cr, vfsp); | |
1669 | if (ret) { | |
1670 | if (dsl_deleg_access((char *)vfsp->vfs_resource, | |
1671 | ZFS_DELEG_PERM_MOUNT, cr)) | |
1672 | return (ret); | |
1673 | } | |
1674 | ||
1675 | /* | |
1676 | * Unmount any snapshots mounted under .zfs before unmounting the | |
1677 | * dataset itself. | |
1678 | */ | |
1679 | if (zfsvfs->z_ctldir != NULL) { | |
1680 | if ((ret = zfsctl_umount_snapshots(vfsp, fflag, cr)) != 0) | |
1681 | return (ret); | |
1682 | } | |
1683 | ||
1684 | if (fflag & MS_FORCE) { | |
1685 | /* | |
1686 | * Mark file system as unmounted before calling | |
1687 | * vflush(FORCECLOSE). This way we ensure no future vnops | |
1688 | * will be called and risk operating on DOOMED vnodes. | |
1689 | */ | |
5ebe425a | 1690 | ZFS_TEARDOWN_ENTER_WRITE(zfsvfs, FTAG); |
9f0a21e6 | 1691 | zfsvfs->z_unmounted = B_TRUE; |
5ebe425a | 1692 | ZFS_TEARDOWN_EXIT(zfsvfs, FTAG); |
9f0a21e6 MM |
1693 | } |
1694 | ||
1695 | /* | |
1696 | * Flush all the files. | |
1697 | */ | |
1698 | ret = vflush(vfsp, 0, (fflag & MS_FORCE) ? FORCECLOSE : 0, td); | |
1699 | if (ret != 0) | |
1700 | return (ret); | |
1701 | while (taskqueue_cancel(zfsvfs_taskq->tq_queue, | |
1702 | &zfsvfs->z_unlinked_drain_task, NULL) != 0) | |
1703 | taskqueue_drain(zfsvfs_taskq->tq_queue, | |
1704 | &zfsvfs->z_unlinked_drain_task); | |
1705 | ||
e4efb709 | 1706 | VERIFY0(zfsvfs_teardown(zfsvfs, B_TRUE)); |
9f0a21e6 MM |
1707 | os = zfsvfs->z_os; |
1708 | ||
1709 | /* | |
1710 | * z_os will be NULL if there was an error in | |
1711 | * attempting to reopen zfsvfs. | |
1712 | */ | |
1713 | if (os != NULL) { | |
1714 | /* | |
1715 | * Unset the objset user_ptr. | |
1716 | */ | |
1717 | mutex_enter(&os->os_user_ptr_lock); | |
1718 | dmu_objset_set_user(os, NULL); | |
1719 | mutex_exit(&os->os_user_ptr_lock); | |
1720 | ||
1721 | /* | |
1722 | * Finally release the objset | |
1723 | */ | |
1724 | dmu_objset_disown(os, B_TRUE, zfsvfs); | |
1725 | } | |
1726 | ||
1727 | /* | |
1728 | * We can now safely destroy the '.zfs' directory node. | |
1729 | */ | |
1730 | if (zfsvfs->z_ctldir != NULL) | |
1731 | zfsctl_destroy(zfsvfs); | |
1732 | zfs_freevfs(vfsp); | |
1733 | ||
1734 | return (0); | |
1735 | } | |
1736 | ||
1737 | static int | |
1738 | zfs_vget(vfs_t *vfsp, ino_t ino, int flags, vnode_t **vpp) | |
1739 | { | |
1740 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1741 | znode_t *zp; | |
1742 | int err; | |
1743 | ||
1744 | /* | |
1745 | * zfs_zget() can't operate on virtual entries like .zfs/ or | |
1746 | * .zfs/snapshot/ directories, that's why we return EOPNOTSUPP. | |
1747 | * This will make NFS to switch to LOOKUP instead of using VGET. | |
1748 | */ | |
1749 | if (ino == ZFSCTL_INO_ROOT || ino == ZFSCTL_INO_SNAPDIR || | |
1750 | (zfsvfs->z_shares_dir != 0 && ino == zfsvfs->z_shares_dir)) | |
1751 | return (EOPNOTSUPP); | |
1752 | ||
768eaced CC |
1753 | if ((err = zfs_enter(zfsvfs, FTAG)) != 0) |
1754 | return (err); | |
9f0a21e6 MM |
1755 | err = zfs_zget(zfsvfs, ino, &zp); |
1756 | if (err == 0 && zp->z_unlinked) { | |
1757 | vrele(ZTOV(zp)); | |
1758 | err = EINVAL; | |
1759 | } | |
1760 | if (err == 0) | |
1761 | *vpp = ZTOV(zp); | |
768eaced | 1762 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
1763 | if (err == 0) { |
1764 | err = vn_lock(*vpp, flags); | |
1765 | if (err != 0) | |
1766 | vrele(*vpp); | |
1767 | } | |
1768 | if (err != 0) | |
1769 | *vpp = NULL; | |
1770 | return (err); | |
1771 | } | |
1772 | ||
1c08fa8b | 1773 | static int |
2e6af52b | 1774 | #if __FreeBSD_version >= 1300098 |
1c08fa8b RM |
1775 | zfs_checkexp(vfs_t *vfsp, struct sockaddr *nam, uint64_t *extflagsp, |
1776 | struct ucred **credanonp, int *numsecflavors, int *secflavors) | |
2e6af52b | 1777 | #else |
9f0a21e6 MM |
1778 | zfs_checkexp(vfs_t *vfsp, struct sockaddr *nam, int *extflagsp, |
1779 | struct ucred **credanonp, int *numsecflavors, int **secflavors) | |
2e6af52b | 1780 | #endif |
9f0a21e6 MM |
1781 | { |
1782 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1783 | ||
1784 | /* | |
1785 | * If this is regular file system vfsp is the same as | |
1786 | * zfsvfs->z_parent->z_vfs, but if it is snapshot, | |
1787 | * zfsvfs->z_parent->z_vfs represents parent file system | |
1788 | * which we have to use here, because only this file system | |
1789 | * has mnt_export configured. | |
1790 | */ | |
1791 | return (vfs_stdcheckexp(zfsvfs->z_parent->z_vfs, nam, extflagsp, | |
1792 | credanonp, numsecflavors, secflavors)); | |
1793 | } | |
1794 | ||
c70bb2f6 AZ |
1795 | _Static_assert(sizeof (struct fid) >= SHORT_FID_LEN, |
1796 | "struct fid bigger than SHORT_FID_LEN"); | |
1797 | _Static_assert(sizeof (struct fid) >= LONG_FID_LEN, | |
1798 | "struct fid bigger than LONG_FID_LEN"); | |
9f0a21e6 MM |
1799 | |
1800 | static int | |
1801 | zfs_fhtovp(vfs_t *vfsp, fid_t *fidp, int flags, vnode_t **vpp) | |
1802 | { | |
1803 | struct componentname cn; | |
1804 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
1805 | znode_t *zp; | |
1806 | vnode_t *dvp; | |
1807 | uint64_t object = 0; | |
1808 | uint64_t fid_gen = 0; | |
43dbf881 | 1809 | uint64_t setgen = 0; |
9f0a21e6 MM |
1810 | uint64_t gen_mask; |
1811 | uint64_t zp_gen; | |
1812 | int i, err; | |
1813 | ||
1814 | *vpp = NULL; | |
1815 | ||
768eaced CC |
1816 | if ((err = zfs_enter(zfsvfs, FTAG)) != 0) |
1817 | return (err); | |
9f0a21e6 MM |
1818 | |
1819 | /* | |
1820 | * On FreeBSD we can get snapshot's mount point or its parent file | |
1821 | * system mount point depending if snapshot is already mounted or not. | |
1822 | */ | |
1823 | if (zfsvfs->z_parent == zfsvfs && fidp->fid_len == LONG_FID_LEN) { | |
1824 | zfid_long_t *zlfid = (zfid_long_t *)fidp; | |
1825 | uint64_t objsetid = 0; | |
9f0a21e6 MM |
1826 | |
1827 | for (i = 0; i < sizeof (zlfid->zf_setid); i++) | |
1828 | objsetid |= ((uint64_t)zlfid->zf_setid[i]) << (8 * i); | |
1829 | ||
1830 | for (i = 0; i < sizeof (zlfid->zf_setgen); i++) | |
1831 | setgen |= ((uint64_t)zlfid->zf_setgen[i]) << (8 * i); | |
1832 | ||
768eaced | 1833 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
1834 | |
1835 | err = zfsctl_lookup_objset(vfsp, objsetid, &zfsvfs); | |
1836 | if (err) | |
1837 | return (SET_ERROR(EINVAL)); | |
768eaced CC |
1838 | if ((err = zfs_enter(zfsvfs, FTAG)) != 0) |
1839 | return (err); | |
9f0a21e6 MM |
1840 | } |
1841 | ||
1842 | if (fidp->fid_len == SHORT_FID_LEN || fidp->fid_len == LONG_FID_LEN) { | |
1843 | zfid_short_t *zfid = (zfid_short_t *)fidp; | |
1844 | ||
1845 | for (i = 0; i < sizeof (zfid->zf_object); i++) | |
1846 | object |= ((uint64_t)zfid->zf_object[i]) << (8 * i); | |
1847 | ||
1848 | for (i = 0; i < sizeof (zfid->zf_gen); i++) | |
1849 | fid_gen |= ((uint64_t)zfid->zf_gen[i]) << (8 * i); | |
1850 | } else { | |
768eaced | 1851 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
1852 | return (SET_ERROR(EINVAL)); |
1853 | } | |
1854 | ||
ed566bf1 MJ |
1855 | if (fidp->fid_len == LONG_FID_LEN && setgen != 0) { |
1856 | zfs_exit(zfsvfs, FTAG); | |
43dbf881 AZ |
1857 | dprintf("snapdir fid: fid_gen (%llu) and setgen (%llu)\n", |
1858 | (u_longlong_t)fid_gen, (u_longlong_t)setgen); | |
1859 | return (SET_ERROR(EINVAL)); | |
1860 | } | |
1861 | ||
9f0a21e6 MM |
1862 | /* |
1863 | * A zero fid_gen means we are in .zfs or the .zfs/snapshot | |
1864 | * directory tree. If the object == zfsvfs->z_shares_dir, then | |
1865 | * we are in the .zfs/shares directory tree. | |
1866 | */ | |
1867 | if ((fid_gen == 0 && | |
1868 | (object == ZFSCTL_INO_ROOT || object == ZFSCTL_INO_SNAPDIR)) || | |
1869 | (zfsvfs->z_shares_dir != 0 && object == zfsvfs->z_shares_dir)) { | |
768eaced | 1870 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
1871 | VERIFY0(zfsctl_root(zfsvfs, LK_SHARED, &dvp)); |
1872 | if (object == ZFSCTL_INO_SNAPDIR) { | |
1873 | cn.cn_nameptr = "snapshot"; | |
1874 | cn.cn_namelen = strlen(cn.cn_nameptr); | |
1875 | cn.cn_nameiop = LOOKUP; | |
1876 | cn.cn_flags = ISLASTCN | LOCKLEAF; | |
1877 | cn.cn_lkflags = flags; | |
1878 | VERIFY0(VOP_LOOKUP(dvp, vpp, &cn)); | |
1879 | vput(dvp); | |
1880 | } else if (object == zfsvfs->z_shares_dir) { | |
1881 | /* | |
1882 | * XXX This branch must not be taken, | |
1883 | * if it is, then the lookup below will | |
1884 | * explode. | |
1885 | */ | |
1886 | cn.cn_nameptr = "shares"; | |
1887 | cn.cn_namelen = strlen(cn.cn_nameptr); | |
1888 | cn.cn_nameiop = LOOKUP; | |
1889 | cn.cn_flags = ISLASTCN; | |
1890 | cn.cn_lkflags = flags; | |
1891 | VERIFY0(VOP_LOOKUP(dvp, vpp, &cn)); | |
1892 | vput(dvp); | |
1893 | } else { | |
1894 | *vpp = dvp; | |
1895 | } | |
1896 | return (err); | |
1897 | } | |
1898 | ||
1899 | gen_mask = -1ULL >> (64 - 8 * i); | |
1900 | ||
8e739b2c RE |
1901 | dprintf("getting %llu [%llu mask %llx]\n", (u_longlong_t)object, |
1902 | (u_longlong_t)fid_gen, | |
1903 | (u_longlong_t)gen_mask); | |
9f0a21e6 | 1904 | if ((err = zfs_zget(zfsvfs, object, &zp))) { |
768eaced | 1905 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
1906 | return (err); |
1907 | } | |
1908 | (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), &zp_gen, | |
1909 | sizeof (uint64_t)); | |
1910 | zp_gen = zp_gen & gen_mask; | |
1911 | if (zp_gen == 0) | |
1912 | zp_gen = 1; | |
1913 | if (zp->z_unlinked || zp_gen != fid_gen) { | |
8e739b2c RE |
1914 | dprintf("znode gen (%llu) != fid gen (%llu)\n", |
1915 | (u_longlong_t)zp_gen, (u_longlong_t)fid_gen); | |
9f0a21e6 | 1916 | vrele(ZTOV(zp)); |
768eaced | 1917 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
1918 | return (SET_ERROR(EINVAL)); |
1919 | } | |
1920 | ||
1921 | *vpp = ZTOV(zp); | |
768eaced | 1922 | zfs_exit(zfsvfs, FTAG); |
9f0a21e6 MM |
1923 | err = vn_lock(*vpp, flags); |
1924 | if (err == 0) | |
1925 | vnode_create_vobject(*vpp, zp->z_size, curthread); | |
1926 | else | |
1927 | *vpp = NULL; | |
1928 | return (err); | |
1929 | } | |
1930 | ||
1931 | /* | |
1932 | * Block out VOPs and close zfsvfs_t::z_os | |
1933 | * | |
1934 | * Note, if successful, then we return with the 'z_teardown_lock' and | |
1935 | * 'z_teardown_inactive_lock' write held. We leave ownership of the underlying | |
1936 | * dataset and objset intact so that they can be atomically handed off during | |
1937 | * a subsequent rollback or recv operation and the resume thereafter. | |
1938 | */ | |
1939 | int | |
1940 | zfs_suspend_fs(zfsvfs_t *zfsvfs) | |
1941 | { | |
1942 | int error; | |
1943 | ||
1944 | if ((error = zfsvfs_teardown(zfsvfs, B_FALSE)) != 0) | |
1945 | return (error); | |
1946 | ||
1947 | return (0); | |
1948 | } | |
1949 | ||
1950 | /* | |
1951 | * Rebuild SA and release VOPs. Note that ownership of the underlying dataset | |
1952 | * is an invariant across any of the operations that can be performed while the | |
1953 | * filesystem was suspended. Whether it succeeded or failed, the preconditions | |
1954 | * are the same: the relevant objset and associated dataset are owned by | |
1955 | * zfsvfs, held, and long held on entry. | |
1956 | */ | |
1957 | int | |
1958 | zfs_resume_fs(zfsvfs_t *zfsvfs, dsl_dataset_t *ds) | |
1959 | { | |
1960 | int err; | |
1961 | znode_t *zp; | |
1962 | ||
5ebe425a | 1963 | ASSERT(ZFS_TEARDOWN_WRITE_HELD(zfsvfs)); |
9847f77f | 1964 | ASSERT(ZFS_TEARDOWN_INACTIVE_WRITE_HELD(zfsvfs)); |
9f0a21e6 MM |
1965 | |
1966 | /* | |
1967 | * We already own this, so just update the objset_t, as the one we | |
1968 | * had before may have been evicted. | |
1969 | */ | |
1970 | objset_t *os; | |
1971 | VERIFY3P(ds->ds_owner, ==, zfsvfs); | |
1972 | VERIFY(dsl_dataset_long_held(ds)); | |
1973 | dsl_pool_t *dp = spa_get_dsl(dsl_dataset_get_spa(ds)); | |
1974 | dsl_pool_config_enter(dp, FTAG); | |
1975 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
1976 | dsl_pool_config_exit(dp, FTAG); | |
1977 | ||
1978 | err = zfsvfs_init(zfsvfs, os); | |
1979 | if (err != 0) | |
1980 | goto bail; | |
1981 | ||
1982 | ds->ds_dir->dd_activity_cancelled = B_FALSE; | |
e4efb709 | 1983 | VERIFY0(zfsvfs_setup(zfsvfs, B_FALSE)); |
9f0a21e6 MM |
1984 | |
1985 | zfs_set_fuid_feature(zfsvfs); | |
1986 | ||
1987 | /* | |
1988 | * Attempt to re-establish all the active znodes with | |
1989 | * their dbufs. If a zfs_rezget() fails, then we'll let | |
768eaced | 1990 | * any potential callers discover that via zfs_enter_verify_zp |
9f0a21e6 MM |
1991 | * when they try to use their znode. |
1992 | */ | |
1993 | mutex_enter(&zfsvfs->z_znodes_lock); | |
1994 | for (zp = list_head(&zfsvfs->z_all_znodes); zp; | |
1995 | zp = list_next(&zfsvfs->z_all_znodes, zp)) { | |
1996 | (void) zfs_rezget(zp); | |
1997 | } | |
1998 | mutex_exit(&zfsvfs->z_znodes_lock); | |
1999 | ||
2000 | bail: | |
2001 | /* release the VOPs */ | |
9847f77f | 2002 | ZFS_TEARDOWN_INACTIVE_EXIT_WRITE(zfsvfs); |
5ebe425a | 2003 | ZFS_TEARDOWN_EXIT(zfsvfs, FTAG); |
9f0a21e6 MM |
2004 | |
2005 | if (err) { | |
2006 | /* | |
2007 | * Since we couldn't setup the sa framework, try to force | |
2008 | * unmount this file system. | |
2009 | */ | |
2010 | if (vn_vfswlock(zfsvfs->z_vfs->vfs_vnodecovered) == 0) { | |
2011 | vfs_ref(zfsvfs->z_vfs); | |
2012 | (void) dounmount(zfsvfs->z_vfs, MS_FORCE, curthread); | |
2013 | } | |
2014 | } | |
2015 | return (err); | |
2016 | } | |
2017 | ||
2018 | static void | |
2019 | zfs_freevfs(vfs_t *vfsp) | |
2020 | { | |
2021 | zfsvfs_t *zfsvfs = vfsp->vfs_data; | |
2022 | ||
2023 | zfsvfs_free(zfsvfs); | |
2024 | ||
2025 | atomic_dec_32(&zfs_active_fs_count); | |
2026 | } | |
2027 | ||
2028 | #ifdef __i386__ | |
2029 | static int desiredvnodes_backup; | |
47ed79ff MM |
2030 | #include <sys/vmmeter.h> |
2031 | ||
2032 | ||
2033 | #include <vm/vm_page.h> | |
2034 | #include <vm/vm_object.h> | |
2035 | #include <vm/vm_kern.h> | |
2036 | #include <vm/vm_map.h> | |
9f0a21e6 MM |
2037 | #endif |
2038 | ||
2039 | static void | |
2040 | zfs_vnodes_adjust(void) | |
2041 | { | |
2042 | #ifdef __i386__ | |
2043 | int newdesiredvnodes; | |
2044 | ||
2045 | desiredvnodes_backup = desiredvnodes; | |
2046 | ||
2047 | /* | |
2048 | * We calculate newdesiredvnodes the same way it is done in | |
2049 | * vntblinit(). If it is equal to desiredvnodes, it means that | |
2050 | * it wasn't tuned by the administrator and we can tune it down. | |
2051 | */ | |
2052 | newdesiredvnodes = min(maxproc + vm_cnt.v_page_count / 4, 2 * | |
2053 | vm_kmem_size / (5 * (sizeof (struct vm_object) + | |
2054 | sizeof (struct vnode)))); | |
2055 | if (newdesiredvnodes == desiredvnodes) | |
2056 | desiredvnodes = (3 * newdesiredvnodes) / 4; | |
2057 | #endif | |
2058 | } | |
2059 | ||
2060 | static void | |
2061 | zfs_vnodes_adjust_back(void) | |
2062 | { | |
2063 | ||
2064 | #ifdef __i386__ | |
2065 | desiredvnodes = desiredvnodes_backup; | |
2066 | #endif | |
2067 | } | |
2068 | ||
2069 | void | |
2070 | zfs_init(void) | |
2071 | { | |
2072 | ||
2073 | printf("ZFS filesystem version: " ZPL_VERSION_STRING "\n"); | |
2074 | ||
2075 | /* | |
2076 | * Initialize .zfs directory structures | |
2077 | */ | |
2078 | zfsctl_init(); | |
2079 | ||
2080 | /* | |
2081 | * Initialize znode cache, vnode ops, etc... | |
2082 | */ | |
2083 | zfs_znode_init(); | |
2084 | ||
2085 | /* | |
2086 | * Reduce number of vnodes. Originally number of vnodes is calculated | |
2087 | * with UFS inode in mind. We reduce it here, because it's too big for | |
2088 | * ZFS/i386. | |
2089 | */ | |
2090 | zfs_vnodes_adjust(); | |
2091 | ||
7bcb7f08 | 2092 | dmu_objset_register_type(DMU_OST_ZFS, zpl_get_file_info); |
9f0a21e6 MM |
2093 | |
2094 | zfsvfs_taskq = taskq_create("zfsvfs", 1, minclsyspri, 0, 0, 0); | |
2095 | } | |
2096 | ||
2097 | void | |
2098 | zfs_fini(void) | |
2099 | { | |
2100 | taskq_destroy(zfsvfs_taskq); | |
2101 | zfsctl_fini(); | |
2102 | zfs_znode_fini(); | |
2103 | zfs_vnodes_adjust_back(); | |
2104 | } | |
2105 | ||
2106 | int | |
2107 | zfs_busy(void) | |
2108 | { | |
2109 | return (zfs_active_fs_count != 0); | |
2110 | } | |
2111 | ||
2112 | /* | |
2113 | * Release VOPs and unmount a suspended filesystem. | |
2114 | */ | |
2115 | int | |
2116 | zfs_end_fs(zfsvfs_t *zfsvfs, dsl_dataset_t *ds) | |
2117 | { | |
5ebe425a | 2118 | ASSERT(ZFS_TEARDOWN_WRITE_HELD(zfsvfs)); |
9847f77f | 2119 | ASSERT(ZFS_TEARDOWN_INACTIVE_WRITE_HELD(zfsvfs)); |
9f0a21e6 MM |
2120 | |
2121 | /* | |
2122 | * We already own this, so just hold and rele it to update the | |
2123 | * objset_t, as the one we had before may have been evicted. | |
2124 | */ | |
2125 | objset_t *os; | |
2126 | VERIFY3P(ds->ds_owner, ==, zfsvfs); | |
2127 | VERIFY(dsl_dataset_long_held(ds)); | |
2128 | dsl_pool_t *dp = spa_get_dsl(dsl_dataset_get_spa(ds)); | |
2129 | dsl_pool_config_enter(dp, FTAG); | |
2130 | VERIFY0(dmu_objset_from_ds(ds, &os)); | |
2131 | dsl_pool_config_exit(dp, FTAG); | |
2132 | zfsvfs->z_os = os; | |
2133 | ||
2134 | /* release the VOPs */ | |
9847f77f | 2135 | ZFS_TEARDOWN_INACTIVE_EXIT_WRITE(zfsvfs); |
5ebe425a | 2136 | ZFS_TEARDOWN_EXIT(zfsvfs, FTAG); |
9f0a21e6 MM |
2137 | |
2138 | /* | |
2139 | * Try to force unmount this file system. | |
2140 | */ | |
2141 | (void) zfs_umount(zfsvfs->z_vfs, 0); | |
2142 | zfsvfs->z_unmounted = B_TRUE; | |
2143 | return (0); | |
2144 | } | |
2145 | ||
2146 | int | |
2147 | zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers) | |
2148 | { | |
2149 | int error; | |
2150 | objset_t *os = zfsvfs->z_os; | |
2151 | dmu_tx_t *tx; | |
2152 | ||
2153 | if (newvers < ZPL_VERSION_INITIAL || newvers > ZPL_VERSION) | |
2154 | return (SET_ERROR(EINVAL)); | |
2155 | ||
2156 | if (newvers < zfsvfs->z_version) | |
2157 | return (SET_ERROR(EINVAL)); | |
2158 | ||
2159 | if (zfs_spa_version_map(newvers) > | |
2160 | spa_version(dmu_objset_spa(zfsvfs->z_os))) | |
2161 | return (SET_ERROR(ENOTSUP)); | |
2162 | ||
2163 | tx = dmu_tx_create(os); | |
2164 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_FALSE, ZPL_VERSION_STR); | |
2165 | if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) { | |
2166 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, B_TRUE, | |
2167 | ZFS_SA_ATTRS); | |
2168 | dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); | |
2169 | } | |
2170 | error = dmu_tx_assign(tx, TXG_WAIT); | |
2171 | if (error) { | |
2172 | dmu_tx_abort(tx); | |
2173 | return (error); | |
2174 | } | |
2175 | ||
2176 | error = zap_update(os, MASTER_NODE_OBJ, ZPL_VERSION_STR, | |
2177 | 8, 1, &newvers, tx); | |
2178 | ||
2179 | if (error) { | |
2180 | dmu_tx_commit(tx); | |
2181 | return (error); | |
2182 | } | |
2183 | ||
2184 | if (newvers >= ZPL_VERSION_SA && !zfsvfs->z_use_sa) { | |
2185 | uint64_t sa_obj; | |
2186 | ||
2187 | ASSERT3U(spa_version(dmu_objset_spa(zfsvfs->z_os)), >=, | |
2188 | SPA_VERSION_SA); | |
2189 | sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE, | |
2190 | DMU_OT_NONE, 0, tx); | |
2191 | ||
2192 | error = zap_add(os, MASTER_NODE_OBJ, | |
2193 | ZFS_SA_ATTRS, 8, 1, &sa_obj, tx); | |
2194 | ASSERT0(error); | |
2195 | ||
e4efb709 | 2196 | VERIFY0(sa_set_sa_object(os, sa_obj)); |
9f0a21e6 MM |
2197 | sa_register_update_callback(os, zfs_sa_upgrade); |
2198 | } | |
2199 | ||
2200 | spa_history_log_internal_ds(dmu_objset_ds(os), "upgrade", tx, | |
47ed79ff MM |
2201 | "from %ju to %ju", (uintmax_t)zfsvfs->z_version, |
2202 | (uintmax_t)newvers); | |
9f0a21e6 MM |
2203 | dmu_tx_commit(tx); |
2204 | ||
2205 | zfsvfs->z_version = newvers; | |
2206 | os->os_version = newvers; | |
2207 | ||
2208 | zfs_set_fuid_feature(zfsvfs); | |
2209 | ||
2210 | return (0); | |
2211 | } | |
2212 | ||
2213 | /* | |
2214 | * Read a property stored within the master node. | |
2215 | */ | |
2216 | int | |
2217 | zfs_get_zplprop(objset_t *os, zfs_prop_t prop, uint64_t *value) | |
2218 | { | |
2219 | uint64_t *cached_copy = NULL; | |
2220 | ||
2221 | /* | |
2222 | * Figure out where in the objset_t the cached copy would live, if it | |
2223 | * is available for the requested property. | |
2224 | */ | |
2225 | if (os != NULL) { | |
2226 | switch (prop) { | |
2227 | case ZFS_PROP_VERSION: | |
2228 | cached_copy = &os->os_version; | |
2229 | break; | |
2230 | case ZFS_PROP_NORMALIZE: | |
2231 | cached_copy = &os->os_normalization; | |
2232 | break; | |
2233 | case ZFS_PROP_UTF8ONLY: | |
2234 | cached_copy = &os->os_utf8only; | |
2235 | break; | |
2236 | case ZFS_PROP_CASE: | |
2237 | cached_copy = &os->os_casesensitivity; | |
2238 | break; | |
2239 | default: | |
2240 | break; | |
2241 | } | |
2242 | } | |
2243 | if (cached_copy != NULL && *cached_copy != OBJSET_PROP_UNINITIALIZED) { | |
2244 | *value = *cached_copy; | |
2245 | return (0); | |
2246 | } | |
2247 | ||
2248 | /* | |
2249 | * If the property wasn't cached, look up the file system's value for | |
2250 | * the property. For the version property, we look up a slightly | |
2251 | * different string. | |
2252 | */ | |
2253 | const char *pname; | |
2254 | int error = ENOENT; | |
2255 | if (prop == ZFS_PROP_VERSION) { | |
2256 | pname = ZPL_VERSION_STR; | |
2257 | } else { | |
2258 | pname = zfs_prop_to_name(prop); | |
2259 | } | |
2260 | ||
2261 | if (os != NULL) { | |
2262 | ASSERT3U(os->os_phys->os_type, ==, DMU_OST_ZFS); | |
2263 | error = zap_lookup(os, MASTER_NODE_OBJ, pname, 8, 1, value); | |
2264 | } | |
2265 | ||
2266 | if (error == ENOENT) { | |
2267 | /* No value set, use the default value */ | |
2268 | switch (prop) { | |
2269 | case ZFS_PROP_VERSION: | |
2270 | *value = ZPL_VERSION; | |
2271 | break; | |
2272 | case ZFS_PROP_NORMALIZE: | |
2273 | case ZFS_PROP_UTF8ONLY: | |
2274 | *value = 0; | |
2275 | break; | |
2276 | case ZFS_PROP_CASE: | |
2277 | *value = ZFS_CASE_SENSITIVE; | |
2278 | break; | |
485b50bb RM |
2279 | case ZFS_PROP_ACLTYPE: |
2280 | *value = ZFS_ACLTYPE_NFSV4; | |
2281 | break; | |
9f0a21e6 MM |
2282 | default: |
2283 | return (error); | |
2284 | } | |
2285 | error = 0; | |
2286 | } | |
2287 | ||
2288 | /* | |
2289 | * If one of the methods for getting the property value above worked, | |
2290 | * copy it into the objset_t's cache. | |
2291 | */ | |
2292 | if (error == 0 && cached_copy != NULL) { | |
2293 | *cached_copy = *value; | |
2294 | } | |
2295 | ||
2296 | return (error); | |
2297 | } | |
2298 | ||
2299 | /* | |
dd4bc569 | 2300 | * Return true if the corresponding vfs's unmounted flag is set. |
9f0a21e6 MM |
2301 | * Otherwise return false. |
2302 | * If this function returns true we know VFS unmount has been initiated. | |
2303 | */ | |
2304 | boolean_t | |
2305 | zfs_get_vfs_flag_unmounted(objset_t *os) | |
2306 | { | |
2307 | zfsvfs_t *zfvp; | |
2308 | boolean_t unmounted = B_FALSE; | |
2309 | ||
e4efb709 | 2310 | ASSERT3U(dmu_objset_type(os), ==, DMU_OST_ZFS); |
9f0a21e6 MM |
2311 | |
2312 | mutex_enter(&os->os_user_ptr_lock); | |
2313 | zfvp = dmu_objset_get_user(os); | |
2314 | if (zfvp != NULL && zfvp->z_vfs != NULL && | |
2315 | (zfvp->z_vfs->mnt_kern_flag & MNTK_UNMOUNT)) | |
2316 | unmounted = B_TRUE; | |
2317 | mutex_exit(&os->os_user_ptr_lock); | |
2318 | ||
2319 | return (unmounted); | |
2320 | } | |
2321 | ||
2322 | #ifdef _KERNEL | |
2323 | void | |
2324 | zfsvfs_update_fromname(const char *oldname, const char *newname) | |
2325 | { | |
2326 | char tmpbuf[MAXPATHLEN]; | |
2327 | struct mount *mp; | |
2328 | char *fromname; | |
2329 | size_t oldlen; | |
2330 | ||
2331 | oldlen = strlen(oldname); | |
2332 | ||
2333 | mtx_lock(&mountlist_mtx); | |
2334 | TAILQ_FOREACH(mp, &mountlist, mnt_list) { | |
2335 | fromname = mp->mnt_stat.f_mntfromname; | |
2336 | if (strcmp(fromname, oldname) == 0) { | |
2337 | (void) strlcpy(fromname, newname, | |
2338 | sizeof (mp->mnt_stat.f_mntfromname)); | |
2339 | continue; | |
2340 | } | |
2341 | if (strncmp(fromname, oldname, oldlen) == 0 && | |
2342 | (fromname[oldlen] == '/' || fromname[oldlen] == '@')) { | |
2343 | (void) snprintf(tmpbuf, sizeof (tmpbuf), "%s%s", | |
2344 | newname, fromname + oldlen); | |
2345 | (void) strlcpy(fromname, tmpbuf, | |
2346 | sizeof (mp->mnt_stat.f_mntfromname)); | |
2347 | continue; | |
2348 | } | |
2349 | } | |
2350 | mtx_unlock(&mountlist_mtx); | |
2351 | } | |
2352 | #endif | |
595d3ac2 AJ |
2353 | |
2354 | /* | |
2355 | * Find a prison with ZFS info. | |
2356 | * Return the ZFS info and the (locked) prison. | |
2357 | */ | |
2358 | static struct zfs_jailparam * | |
2359 | zfs_jailparam_find(struct prison *spr, struct prison **prp) | |
2360 | { | |
2361 | struct prison *pr; | |
2362 | struct zfs_jailparam *zjp; | |
2363 | ||
2364 | for (pr = spr; ; pr = pr->pr_parent) { | |
2365 | mtx_lock(&pr->pr_mtx); | |
2366 | if (pr == &prison0) { | |
2367 | zjp = &zfs_jailparam0; | |
2368 | break; | |
2369 | } | |
2370 | zjp = osd_jail_get(pr, zfs_jailparam_slot); | |
2371 | if (zjp != NULL) | |
2372 | break; | |
2373 | mtx_unlock(&pr->pr_mtx); | |
2374 | } | |
2375 | *prp = pr; | |
2376 | ||
2377 | return (zjp); | |
2378 | } | |
2379 | ||
2380 | /* | |
2381 | * Ensure a prison has its own ZFS info. If zjpp is non-null, point it to the | |
2382 | * ZFS info and lock the prison. | |
2383 | */ | |
2384 | static void | |
2385 | zfs_jailparam_alloc(struct prison *pr, struct zfs_jailparam **zjpp) | |
2386 | { | |
2387 | struct prison *ppr; | |
2388 | struct zfs_jailparam *zjp, *nzjp; | |
2389 | void **rsv; | |
2390 | ||
2391 | /* If this prison already has ZFS info, return that. */ | |
2392 | zjp = zfs_jailparam_find(pr, &ppr); | |
2393 | if (ppr == pr) | |
2394 | goto done; | |
2395 | ||
2396 | /* | |
2397 | * Allocate a new info record. Then check again, in case something | |
2398 | * changed during the allocation. | |
2399 | */ | |
2400 | mtx_unlock(&ppr->pr_mtx); | |
2401 | nzjp = malloc(sizeof (struct zfs_jailparam), M_PRISON, M_WAITOK); | |
2402 | rsv = osd_reserve(zfs_jailparam_slot); | |
2403 | zjp = zfs_jailparam_find(pr, &ppr); | |
2404 | if (ppr == pr) { | |
2405 | free(nzjp, M_PRISON); | |
2406 | osd_free_reserved(rsv); | |
2407 | goto done; | |
2408 | } | |
2409 | /* Inherit the initial values from the ancestor. */ | |
2410 | mtx_lock(&pr->pr_mtx); | |
2411 | (void) osd_jail_set_reserved(pr, zfs_jailparam_slot, rsv, nzjp); | |
2412 | (void) memcpy(nzjp, zjp, sizeof (*zjp)); | |
2413 | zjp = nzjp; | |
2414 | mtx_unlock(&ppr->pr_mtx); | |
2415 | done: | |
2416 | if (zjpp != NULL) | |
2417 | *zjpp = zjp; | |
2418 | else | |
2419 | mtx_unlock(&pr->pr_mtx); | |
2420 | } | |
2421 | ||
2422 | /* | |
2423 | * Jail OSD methods for ZFS VFS info. | |
2424 | */ | |
2425 | static int | |
2426 | zfs_jailparam_create(void *obj, void *data) | |
2427 | { | |
2428 | struct prison *pr = obj; | |
2429 | struct vfsoptlist *opts = data; | |
2430 | int jsys; | |
2431 | ||
2432 | if (vfs_copyopt(opts, "zfs", &jsys, sizeof (jsys)) == 0 && | |
2433 | jsys == JAIL_SYS_INHERIT) | |
2434 | return (0); | |
2435 | /* | |
2436 | * Inherit a prison's initial values from its parent | |
2437 | * (different from JAIL_SYS_INHERIT which also inherits changes). | |
2438 | */ | |
2439 | zfs_jailparam_alloc(pr, NULL); | |
2440 | return (0); | |
2441 | } | |
2442 | ||
2443 | static int | |
2444 | zfs_jailparam_get(void *obj, void *data) | |
2445 | { | |
2446 | struct prison *ppr, *pr = obj; | |
2447 | struct vfsoptlist *opts = data; | |
2448 | struct zfs_jailparam *zjp; | |
2449 | int jsys, error; | |
2450 | ||
2451 | zjp = zfs_jailparam_find(pr, &ppr); | |
2452 | jsys = (ppr == pr) ? JAIL_SYS_NEW : JAIL_SYS_INHERIT; | |
2453 | error = vfs_setopt(opts, "zfs", &jsys, sizeof (jsys)); | |
2454 | if (error != 0 && error != ENOENT) | |
2455 | goto done; | |
2456 | if (jsys == JAIL_SYS_NEW) { | |
2457 | error = vfs_setopt(opts, "zfs.mount_snapshot", | |
2458 | &zjp->mount_snapshot, sizeof (zjp->mount_snapshot)); | |
2459 | if (error != 0 && error != ENOENT) | |
2460 | goto done; | |
2461 | } else { | |
2462 | /* | |
2463 | * If this prison is inheriting its ZFS info, report | |
2464 | * empty/zero parameters. | |
2465 | */ | |
2466 | static int mount_snapshot = 0; | |
2467 | ||
2468 | error = vfs_setopt(opts, "zfs.mount_snapshot", | |
2469 | &mount_snapshot, sizeof (mount_snapshot)); | |
2470 | if (error != 0 && error != ENOENT) | |
2471 | goto done; | |
2472 | } | |
2473 | error = 0; | |
2474 | done: | |
2475 | mtx_unlock(&ppr->pr_mtx); | |
2476 | return (error); | |
2477 | } | |
2478 | ||
2479 | static int | |
2480 | zfs_jailparam_set(void *obj, void *data) | |
2481 | { | |
2482 | struct prison *pr = obj; | |
2483 | struct prison *ppr; | |
2484 | struct vfsoptlist *opts = data; | |
2485 | int error, jsys, mount_snapshot; | |
2486 | ||
2487 | /* Set the parameters, which should be correct. */ | |
2488 | error = vfs_copyopt(opts, "zfs", &jsys, sizeof (jsys)); | |
2489 | if (error == ENOENT) | |
2490 | jsys = -1; | |
2491 | error = vfs_copyopt(opts, "zfs.mount_snapshot", &mount_snapshot, | |
2492 | sizeof (mount_snapshot)); | |
2493 | if (error == ENOENT) | |
2494 | mount_snapshot = -1; | |
2495 | else | |
2496 | jsys = JAIL_SYS_NEW; | |
2497 | if (jsys == JAIL_SYS_NEW) { | |
2498 | /* "zfs=new" or "zfs.*": the prison gets its own ZFS info. */ | |
2499 | struct zfs_jailparam *zjp; | |
2500 | ||
2501 | /* | |
2502 | * A child jail cannot have more permissions than its parent | |
2503 | */ | |
2504 | if (pr->pr_parent != &prison0) { | |
2505 | zjp = zfs_jailparam_find(pr->pr_parent, &ppr); | |
2506 | mtx_unlock(&ppr->pr_mtx); | |
2507 | if (zjp->mount_snapshot < mount_snapshot) { | |
2508 | return (EPERM); | |
2509 | } | |
2510 | } | |
2511 | zfs_jailparam_alloc(pr, &zjp); | |
2512 | if (mount_snapshot != -1) | |
2513 | zjp->mount_snapshot = mount_snapshot; | |
2514 | mtx_unlock(&pr->pr_mtx); | |
2515 | } else { | |
2516 | /* "zfs=inherit": inherit the parent's ZFS info. */ | |
2517 | mtx_lock(&pr->pr_mtx); | |
2518 | osd_jail_del(pr, zfs_jailparam_slot); | |
2519 | mtx_unlock(&pr->pr_mtx); | |
2520 | } | |
2521 | return (0); | |
2522 | } | |
2523 | ||
2524 | static int | |
2525 | zfs_jailparam_check(void *obj __unused, void *data) | |
2526 | { | |
2527 | struct vfsoptlist *opts = data; | |
2528 | int error, jsys, mount_snapshot; | |
2529 | ||
2530 | /* Check that the parameters are correct. */ | |
2531 | error = vfs_copyopt(opts, "zfs", &jsys, sizeof (jsys)); | |
2532 | if (error != ENOENT) { | |
2533 | if (error != 0) | |
2534 | return (error); | |
2535 | if (jsys != JAIL_SYS_NEW && jsys != JAIL_SYS_INHERIT) | |
2536 | return (EINVAL); | |
2537 | } | |
2538 | error = vfs_copyopt(opts, "zfs.mount_snapshot", &mount_snapshot, | |
2539 | sizeof (mount_snapshot)); | |
2540 | if (error != ENOENT) { | |
2541 | if (error != 0) | |
2542 | return (error); | |
2543 | if (mount_snapshot != 0 && mount_snapshot != 1) | |
2544 | return (EINVAL); | |
2545 | } | |
2546 | return (0); | |
2547 | } | |
2548 | ||
2549 | static void | |
2550 | zfs_jailparam_destroy(void *data) | |
2551 | { | |
2552 | ||
2553 | free(data, M_PRISON); | |
2554 | } | |
2555 | ||
2556 | static void | |
2557 | zfs_jailparam_sysinit(void *arg __unused) | |
2558 | { | |
2559 | struct prison *pr; | |
2560 | osd_method_t methods[PR_MAXMETHOD] = { | |
2561 | [PR_METHOD_CREATE] = zfs_jailparam_create, | |
2562 | [PR_METHOD_GET] = zfs_jailparam_get, | |
2563 | [PR_METHOD_SET] = zfs_jailparam_set, | |
2564 | [PR_METHOD_CHECK] = zfs_jailparam_check, | |
2565 | }; | |
2566 | ||
2567 | zfs_jailparam_slot = osd_jail_register(zfs_jailparam_destroy, methods); | |
2568 | /* Copy the defaults to any existing prisons. */ | |
2569 | sx_slock(&allprison_lock); | |
2570 | TAILQ_FOREACH(pr, &allprison, pr_list) | |
2571 | zfs_jailparam_alloc(pr, NULL); | |
2572 | sx_sunlock(&allprison_lock); | |
2573 | } | |
2574 | ||
2575 | static void | |
2576 | zfs_jailparam_sysuninit(void *arg __unused) | |
2577 | { | |
2578 | ||
2579 | osd_jail_deregister(zfs_jailparam_slot); | |
2580 | } | |
2581 | ||
2582 | SYSINIT(zfs_jailparam_sysinit, SI_SUB_DRIVERS, SI_ORDER_ANY, | |
2583 | zfs_jailparam_sysinit, NULL); | |
2584 | SYSUNINIT(zfs_jailparam_sysuninit, SI_SUB_DRIVERS, SI_ORDER_ANY, | |
2585 | zfs_jailparam_sysuninit, NULL); |