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1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
22 | * Copyright 2008 Sun Microsystems, Inc. All rights reserved. | |
23 | * Use is subject to license terms. | |
24 | */ | |
25 | ||
26 | #pragma ident "@(#)zfs_acl.c 1.25 08/04/08 SMI" | |
27 | ||
28 | #include <sys/types.h> | |
29 | #include <sys/param.h> | |
30 | #include <sys/time.h> | |
31 | #include <sys/systm.h> | |
32 | #include <sys/sysmacros.h> | |
33 | #include <sys/resource.h> | |
34 | #include <sys/vfs.h> | |
35 | #include <sys/vnode.h> | |
36 | #include <sys/sid.h> | |
37 | #include <sys/file.h> | |
38 | #include <sys/stat.h> | |
39 | #include <sys/kmem.h> | |
40 | #include <sys/cmn_err.h> | |
41 | #include <sys/errno.h> | |
42 | #include <sys/unistd.h> | |
43 | #include <sys/sdt.h> | |
44 | #include <sys/fs/zfs.h> | |
45 | #include <sys/mode.h> | |
46 | #include <sys/policy.h> | |
47 | #include <sys/zfs_znode.h> | |
48 | #include <sys/zfs_fuid.h> | |
49 | #include <sys/zfs_acl.h> | |
50 | #include <sys/zfs_dir.h> | |
51 | #include <sys/zfs_vfsops.h> | |
52 | #include <sys/dmu.h> | |
53 | #include <sys/dnode.h> | |
54 | #include <sys/zap.h> | |
55 | #include "fs/fs_subr.h" | |
56 | #include <acl/acl_common.h> | |
57 | ||
58 | #define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE | |
59 | #define DENY ACE_ACCESS_DENIED_ACE_TYPE | |
60 | #define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE | |
61 | ||
62 | #define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP) | |
63 | #define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \ | |
64 | ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE) | |
65 | #define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \ | |
66 | ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS) | |
67 | #define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \ | |
68 | ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS) | |
69 | #define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS) | |
70 | ||
71 | #define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \ | |
72 | ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \ | |
73 | ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \ | |
74 | ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE) | |
75 | ||
76 | #define WRITE_MASK (WRITE_MASK_DATA|ACE_WRITE_ATTRIBUTES|ACE_WRITE_ACL|\ | |
77 | ACE_WRITE_OWNER) | |
78 | ||
79 | #define OGE_CLEAR (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \ | |
80 | ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE) | |
81 | ||
82 | #define OKAY_MASK_BITS (ACE_READ_DATA|ACE_LIST_DIRECTORY|ACE_WRITE_DATA| \ | |
83 | ACE_ADD_FILE|ACE_APPEND_DATA|ACE_ADD_SUBDIRECTORY|ACE_EXECUTE) | |
84 | ||
85 | #define ALL_INHERIT (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE | \ | |
86 | ACE_NO_PROPAGATE_INHERIT_ACE|ACE_INHERIT_ONLY_ACE|ACE_INHERITED_ACE) | |
87 | ||
88 | #define RESTRICTED_CLEAR (ACE_WRITE_ACL|ACE_WRITE_OWNER) | |
89 | ||
90 | #define V4_ACL_WIDE_FLAGS (ZFS_ACL_AUTO_INHERIT|ZFS_ACL_DEFAULTED|\ | |
91 | ZFS_ACL_PROTECTED) | |
92 | ||
93 | #define ZFS_ACL_WIDE_FLAGS (V4_ACL_WIDE_FLAGS|ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|\ | |
94 | ZFS_ACL_OBJ_ACE) | |
95 | ||
96 | static uint16_t | |
97 | zfs_ace_v0_get_type(void *acep) | |
98 | { | |
99 | return (((zfs_oldace_t *)acep)->z_type); | |
100 | } | |
101 | ||
102 | static uint16_t | |
103 | zfs_ace_v0_get_flags(void *acep) | |
104 | { | |
105 | return (((zfs_oldace_t *)acep)->z_flags); | |
106 | } | |
107 | ||
108 | static uint32_t | |
109 | zfs_ace_v0_get_mask(void *acep) | |
110 | { | |
111 | return (((zfs_oldace_t *)acep)->z_access_mask); | |
112 | } | |
113 | ||
114 | static uint64_t | |
115 | zfs_ace_v0_get_who(void *acep) | |
116 | { | |
117 | return (((zfs_oldace_t *)acep)->z_fuid); | |
118 | } | |
119 | ||
120 | static void | |
121 | zfs_ace_v0_set_type(void *acep, uint16_t type) | |
122 | { | |
123 | ((zfs_oldace_t *)acep)->z_type = type; | |
124 | } | |
125 | ||
126 | static void | |
127 | zfs_ace_v0_set_flags(void *acep, uint16_t flags) | |
128 | { | |
129 | ((zfs_oldace_t *)acep)->z_flags = flags; | |
130 | } | |
131 | ||
132 | static void | |
133 | zfs_ace_v0_set_mask(void *acep, uint32_t mask) | |
134 | { | |
135 | ((zfs_oldace_t *)acep)->z_access_mask = mask; | |
136 | } | |
137 | ||
138 | static void | |
139 | zfs_ace_v0_set_who(void *acep, uint64_t who) | |
140 | { | |
141 | ((zfs_oldace_t *)acep)->z_fuid = who; | |
142 | } | |
143 | ||
144 | /*ARGSUSED*/ | |
145 | static size_t | |
146 | zfs_ace_v0_size(void *acep) | |
147 | { | |
148 | return (sizeof (zfs_oldace_t)); | |
149 | } | |
150 | ||
151 | static size_t | |
152 | zfs_ace_v0_abstract_size(void) | |
153 | { | |
154 | return (sizeof (zfs_oldace_t)); | |
155 | } | |
156 | ||
157 | static int | |
158 | zfs_ace_v0_mask_off(void) | |
159 | { | |
160 | return (offsetof(zfs_oldace_t, z_access_mask)); | |
161 | } | |
162 | ||
163 | /*ARGSUSED*/ | |
164 | static int | |
165 | zfs_ace_v0_data(void *acep, void **datap) | |
166 | { | |
167 | *datap = NULL; | |
168 | return (0); | |
169 | } | |
170 | ||
171 | static acl_ops_t zfs_acl_v0_ops = { | |
172 | zfs_ace_v0_get_mask, | |
173 | zfs_ace_v0_set_mask, | |
174 | zfs_ace_v0_get_flags, | |
175 | zfs_ace_v0_set_flags, | |
176 | zfs_ace_v0_get_type, | |
177 | zfs_ace_v0_set_type, | |
178 | zfs_ace_v0_get_who, | |
179 | zfs_ace_v0_set_who, | |
180 | zfs_ace_v0_size, | |
181 | zfs_ace_v0_abstract_size, | |
182 | zfs_ace_v0_mask_off, | |
183 | zfs_ace_v0_data | |
184 | }; | |
185 | ||
186 | static uint16_t | |
187 | zfs_ace_fuid_get_type(void *acep) | |
188 | { | |
189 | return (((zfs_ace_hdr_t *)acep)->z_type); | |
190 | } | |
191 | ||
192 | static uint16_t | |
193 | zfs_ace_fuid_get_flags(void *acep) | |
194 | { | |
195 | return (((zfs_ace_hdr_t *)acep)->z_flags); | |
196 | } | |
197 | ||
198 | static uint32_t | |
199 | zfs_ace_fuid_get_mask(void *acep) | |
200 | { | |
201 | return (((zfs_ace_hdr_t *)acep)->z_access_mask); | |
202 | } | |
203 | ||
204 | static uint64_t | |
205 | zfs_ace_fuid_get_who(void *args) | |
206 | { | |
207 | uint16_t entry_type; | |
208 | zfs_ace_t *acep = args; | |
209 | ||
210 | entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS; | |
211 | ||
212 | if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP || | |
213 | entry_type == ACE_EVERYONE) | |
214 | return (-1); | |
215 | return (((zfs_ace_t *)acep)->z_fuid); | |
216 | } | |
217 | ||
218 | static void | |
219 | zfs_ace_fuid_set_type(void *acep, uint16_t type) | |
220 | { | |
221 | ((zfs_ace_hdr_t *)acep)->z_type = type; | |
222 | } | |
223 | ||
224 | static void | |
225 | zfs_ace_fuid_set_flags(void *acep, uint16_t flags) | |
226 | { | |
227 | ((zfs_ace_hdr_t *)acep)->z_flags = flags; | |
228 | } | |
229 | ||
230 | static void | |
231 | zfs_ace_fuid_set_mask(void *acep, uint32_t mask) | |
232 | { | |
233 | ((zfs_ace_hdr_t *)acep)->z_access_mask = mask; | |
234 | } | |
235 | ||
236 | static void | |
237 | zfs_ace_fuid_set_who(void *arg, uint64_t who) | |
238 | { | |
239 | zfs_ace_t *acep = arg; | |
240 | ||
241 | uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS; | |
242 | ||
243 | if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP || | |
244 | entry_type == ACE_EVERYONE) | |
245 | return; | |
246 | acep->z_fuid = who; | |
247 | } | |
248 | ||
249 | static size_t | |
250 | zfs_ace_fuid_size(void *acep) | |
251 | { | |
252 | zfs_ace_hdr_t *zacep = acep; | |
253 | uint16_t entry_type; | |
254 | ||
255 | switch (zacep->z_type) { | |
256 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
257 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
258 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
259 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
260 | return (sizeof (zfs_object_ace_t)); | |
261 | case ALLOW: | |
262 | case DENY: | |
263 | entry_type = | |
264 | (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS); | |
265 | if (entry_type == ACE_OWNER || | |
266 | entry_type == (ACE_GROUP | ACE_IDENTIFIER_GROUP) || | |
267 | entry_type == ACE_EVERYONE) | |
268 | return (sizeof (zfs_ace_hdr_t)); | |
269 | /*FALLTHROUGH*/ | |
270 | default: | |
271 | return (sizeof (zfs_ace_t)); | |
272 | } | |
273 | } | |
274 | ||
275 | static size_t | |
276 | zfs_ace_fuid_abstract_size(void) | |
277 | { | |
278 | return (sizeof (zfs_ace_hdr_t)); | |
279 | } | |
280 | ||
281 | static int | |
282 | zfs_ace_fuid_mask_off(void) | |
283 | { | |
284 | return (offsetof(zfs_ace_hdr_t, z_access_mask)); | |
285 | } | |
286 | ||
287 | static int | |
288 | zfs_ace_fuid_data(void *acep, void **datap) | |
289 | { | |
290 | zfs_ace_t *zacep = acep; | |
291 | zfs_object_ace_t *zobjp; | |
292 | ||
293 | switch (zacep->z_hdr.z_type) { | |
294 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
295 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
296 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
297 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
298 | zobjp = acep; | |
299 | *datap = (caddr_t)zobjp + sizeof (zfs_ace_t); | |
300 | return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t)); | |
301 | default: | |
302 | *datap = NULL; | |
303 | return (0); | |
304 | } | |
305 | } | |
306 | ||
307 | static acl_ops_t zfs_acl_fuid_ops = { | |
308 | zfs_ace_fuid_get_mask, | |
309 | zfs_ace_fuid_set_mask, | |
310 | zfs_ace_fuid_get_flags, | |
311 | zfs_ace_fuid_set_flags, | |
312 | zfs_ace_fuid_get_type, | |
313 | zfs_ace_fuid_set_type, | |
314 | zfs_ace_fuid_get_who, | |
315 | zfs_ace_fuid_set_who, | |
316 | zfs_ace_fuid_size, | |
317 | zfs_ace_fuid_abstract_size, | |
318 | zfs_ace_fuid_mask_off, | |
319 | zfs_ace_fuid_data | |
320 | }; | |
321 | ||
322 | static int | |
323 | zfs_acl_version(int version) | |
324 | { | |
325 | if (version < ZPL_VERSION_FUID) | |
326 | return (ZFS_ACL_VERSION_INITIAL); | |
327 | else | |
328 | return (ZFS_ACL_VERSION_FUID); | |
329 | } | |
330 | ||
331 | static int | |
332 | zfs_acl_version_zp(znode_t *zp) | |
333 | { | |
334 | return (zfs_acl_version(zp->z_zfsvfs->z_version)); | |
335 | } | |
336 | ||
337 | static zfs_acl_t * | |
338 | zfs_acl_alloc(int vers) | |
339 | { | |
340 | zfs_acl_t *aclp; | |
341 | ||
342 | aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP); | |
343 | list_create(&aclp->z_acl, sizeof (zfs_acl_node_t), | |
344 | offsetof(zfs_acl_node_t, z_next)); | |
345 | aclp->z_version = vers; | |
346 | if (vers == ZFS_ACL_VERSION_FUID) | |
347 | aclp->z_ops = zfs_acl_fuid_ops; | |
348 | else | |
349 | aclp->z_ops = zfs_acl_v0_ops; | |
350 | return (aclp); | |
351 | } | |
352 | ||
353 | static zfs_acl_node_t * | |
354 | zfs_acl_node_alloc(size_t bytes) | |
355 | { | |
356 | zfs_acl_node_t *aclnode; | |
357 | ||
358 | aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_SLEEP); | |
359 | if (bytes) { | |
360 | aclnode->z_acldata = kmem_alloc(bytes, KM_SLEEP); | |
361 | aclnode->z_allocdata = aclnode->z_acldata; | |
362 | aclnode->z_allocsize = bytes; | |
363 | aclnode->z_size = bytes; | |
364 | } | |
365 | ||
366 | return (aclnode); | |
367 | } | |
368 | ||
369 | static void | |
370 | zfs_acl_node_free(zfs_acl_node_t *aclnode) | |
371 | { | |
372 | if (aclnode->z_allocsize) | |
373 | kmem_free(aclnode->z_allocdata, aclnode->z_allocsize); | |
374 | kmem_free(aclnode, sizeof (zfs_acl_node_t)); | |
375 | } | |
376 | ||
377 | static void | |
378 | zfs_acl_release_nodes(zfs_acl_t *aclp) | |
379 | { | |
380 | zfs_acl_node_t *aclnode; | |
381 | ||
382 | while (aclnode = list_head(&aclp->z_acl)) { | |
383 | list_remove(&aclp->z_acl, aclnode); | |
384 | zfs_acl_node_free(aclnode); | |
385 | } | |
386 | aclp->z_acl_count = 0; | |
387 | aclp->z_acl_bytes = 0; | |
388 | } | |
389 | ||
390 | void | |
391 | zfs_acl_free(zfs_acl_t *aclp) | |
392 | { | |
393 | zfs_acl_release_nodes(aclp); | |
394 | list_destroy(&aclp->z_acl); | |
395 | kmem_free(aclp, sizeof (zfs_acl_t)); | |
396 | } | |
397 | ||
398 | static boolean_t | |
399 | zfs_ace_valid(vtype_t obj_type, zfs_acl_t *aclp, uint16_t type, uint16_t iflags) | |
400 | { | |
401 | /* | |
402 | * first check type of entry | |
403 | */ | |
404 | ||
405 | switch (iflags & ACE_TYPE_FLAGS) { | |
406 | case ACE_OWNER: | |
407 | case (ACE_IDENTIFIER_GROUP | ACE_GROUP): | |
408 | case ACE_IDENTIFIER_GROUP: | |
409 | case ACE_EVERYONE: | |
410 | case 0: /* User entry */ | |
411 | break; | |
412 | default: | |
413 | return (B_FALSE); | |
414 | ||
415 | } | |
416 | ||
417 | /* | |
418 | * next check inheritance level flags | |
419 | */ | |
420 | ||
421 | if (type != ALLOW && type > MAX_ACE_TYPE) { | |
422 | return (B_FALSE); | |
423 | } | |
424 | ||
425 | switch (type) { | |
426 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
427 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
428 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
429 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
430 | if (aclp->z_version < ZFS_ACL_VERSION_FUID) | |
431 | return (B_FALSE); | |
432 | aclp->z_hints |= ZFS_ACL_OBJ_ACE; | |
433 | } | |
434 | ||
435 | /* | |
436 | * Only directories should have inheritance flags. | |
437 | */ | |
438 | if (obj_type != VDIR && (iflags & | |
439 | (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE| | |
440 | ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE))) { | |
441 | return (B_FALSE); | |
442 | } | |
443 | ||
444 | if (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE)) | |
445 | aclp->z_hints |= ZFS_INHERIT_ACE; | |
446 | ||
447 | if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) { | |
448 | if ((iflags & (ACE_FILE_INHERIT_ACE| | |
449 | ACE_DIRECTORY_INHERIT_ACE)) == 0) { | |
450 | return (B_FALSE); | |
451 | } | |
452 | } | |
453 | ||
454 | return (B_TRUE); | |
455 | } | |
456 | ||
457 | static void * | |
458 | zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who, | |
459 | uint32_t *access_mask, uint16_t *iflags, uint16_t *type) | |
460 | { | |
461 | zfs_acl_node_t *aclnode; | |
462 | ||
463 | if (start == NULL) { | |
464 | aclnode = list_head(&aclp->z_acl); | |
465 | if (aclnode == NULL) | |
466 | return (NULL); | |
467 | ||
468 | aclp->z_next_ace = aclnode->z_acldata; | |
469 | aclp->z_curr_node = aclnode; | |
470 | aclnode->z_ace_idx = 0; | |
471 | } | |
472 | ||
473 | aclnode = aclp->z_curr_node; | |
474 | ||
475 | if (aclnode == NULL) | |
476 | return (NULL); | |
477 | ||
478 | if (aclnode->z_ace_idx >= aclnode->z_ace_count) { | |
479 | aclnode = list_next(&aclp->z_acl, aclnode); | |
480 | if (aclnode == NULL) | |
481 | return (NULL); | |
482 | else { | |
483 | aclp->z_curr_node = aclnode; | |
484 | aclnode->z_ace_idx = 0; | |
485 | aclp->z_next_ace = aclnode->z_acldata; | |
486 | } | |
487 | } | |
488 | ||
489 | if (aclnode->z_ace_idx < aclnode->z_ace_count) { | |
490 | void *acep = aclp->z_next_ace; | |
491 | *iflags = aclp->z_ops.ace_flags_get(acep); | |
492 | *type = aclp->z_ops.ace_type_get(acep); | |
493 | *access_mask = aclp->z_ops.ace_mask_get(acep); | |
494 | *who = aclp->z_ops.ace_who_get(acep); | |
495 | aclp->z_next_ace = (caddr_t)aclp->z_next_ace + | |
496 | aclp->z_ops.ace_size(acep); | |
497 | aclnode->z_ace_idx++; | |
498 | return ((void *)acep); | |
499 | } | |
500 | return (NULL); | |
501 | } | |
502 | ||
503 | /*ARGSUSED*/ | |
504 | static uint64_t | |
505 | zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt, | |
506 | uint16_t *flags, uint16_t *type, uint32_t *mask) | |
507 | { | |
508 | zfs_acl_t *aclp = datap; | |
509 | zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie; | |
510 | uint64_t who; | |
511 | ||
512 | acep = zfs_acl_next_ace(aclp, acep, &who, mask, | |
513 | flags, type); | |
514 | return ((uint64_t)(uintptr_t)acep); | |
515 | } | |
516 | ||
517 | static zfs_acl_node_t * | |
518 | zfs_acl_curr_node(zfs_acl_t *aclp) | |
519 | { | |
520 | ASSERT(aclp->z_curr_node); | |
521 | return (aclp->z_curr_node); | |
522 | } | |
523 | ||
524 | /* | |
525 | * Copy ACE to internal ZFS format. | |
526 | * While processing the ACL each ACE will be validated for correctness. | |
527 | * ACE FUIDs will be created later. | |
528 | */ | |
529 | int | |
530 | zfs_copy_ace_2_fuid(vtype_t obj_type, zfs_acl_t *aclp, void *datap, | |
531 | zfs_ace_t *z_acl, int aclcnt, size_t *size) | |
532 | { | |
533 | int i; | |
534 | uint16_t entry_type; | |
535 | zfs_ace_t *aceptr = z_acl; | |
536 | ace_t *acep = datap; | |
537 | zfs_object_ace_t *zobjacep; | |
538 | ace_object_t *aceobjp; | |
539 | ||
540 | for (i = 0; i != aclcnt; i++) { | |
541 | aceptr->z_hdr.z_access_mask = acep->a_access_mask; | |
542 | aceptr->z_hdr.z_flags = acep->a_flags; | |
543 | aceptr->z_hdr.z_type = acep->a_type; | |
544 | entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS; | |
545 | if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP && | |
546 | entry_type != ACE_EVERYONE) { | |
547 | if (!aclp->z_has_fuids) | |
548 | aclp->z_has_fuids = IS_EPHEMERAL(acep->a_who); | |
549 | aceptr->z_fuid = (uint64_t)acep->a_who; | |
550 | } | |
551 | ||
552 | /* | |
553 | * Make sure ACE is valid | |
554 | */ | |
555 | if (zfs_ace_valid(obj_type, aclp, aceptr->z_hdr.z_type, | |
556 | aceptr->z_hdr.z_flags) != B_TRUE) | |
557 | return (EINVAL); | |
558 | ||
559 | switch (acep->a_type) { | |
560 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
561 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
562 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
563 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
564 | zobjacep = (zfs_object_ace_t *)aceptr; | |
565 | aceobjp = (ace_object_t *)acep; | |
566 | ||
567 | bcopy(aceobjp->a_obj_type, zobjacep->z_object_type, | |
568 | sizeof (aceobjp->a_obj_type)); | |
569 | bcopy(aceobjp->a_inherit_obj_type, | |
570 | zobjacep->z_inherit_type, | |
571 | sizeof (aceobjp->a_inherit_obj_type)); | |
572 | acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t)); | |
573 | break; | |
574 | default: | |
575 | acep = (ace_t *)((caddr_t)acep + sizeof (ace_t)); | |
576 | } | |
577 | ||
578 | aceptr = (zfs_ace_t *)((caddr_t)aceptr + | |
579 | aclp->z_ops.ace_size(aceptr)); | |
580 | } | |
581 | ||
582 | *size = (caddr_t)aceptr - (caddr_t)z_acl; | |
583 | ||
584 | return (0); | |
585 | } | |
586 | ||
587 | /* | |
588 | * Copy ZFS ACEs to fixed size ace_t layout | |
589 | */ | |
590 | static void | |
591 | zfs_copy_fuid_2_ace(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, cred_t *cr, | |
592 | void *datap, int filter) | |
593 | { | |
594 | uint64_t who; | |
595 | uint32_t access_mask; | |
596 | uint16_t iflags, type; | |
597 | zfs_ace_hdr_t *zacep = NULL; | |
598 | ace_t *acep = datap; | |
599 | ace_object_t *objacep; | |
600 | zfs_object_ace_t *zobjacep; | |
601 | size_t ace_size; | |
602 | uint16_t entry_type; | |
603 | ||
604 | while (zacep = zfs_acl_next_ace(aclp, zacep, | |
605 | &who, &access_mask, &iflags, &type)) { | |
606 | ||
607 | switch (type) { | |
608 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
609 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
610 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
611 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
612 | if (filter) { | |
613 | continue; | |
614 | } | |
615 | zobjacep = (zfs_object_ace_t *)zacep; | |
616 | objacep = (ace_object_t *)acep; | |
617 | bcopy(zobjacep->z_object_type, | |
618 | objacep->a_obj_type, | |
619 | sizeof (zobjacep->z_object_type)); | |
620 | bcopy(zobjacep->z_inherit_type, | |
621 | objacep->a_inherit_obj_type, | |
622 | sizeof (zobjacep->z_inherit_type)); | |
623 | ace_size = sizeof (ace_object_t); | |
624 | break; | |
625 | default: | |
626 | ace_size = sizeof (ace_t); | |
627 | break; | |
628 | } | |
629 | ||
630 | entry_type = (iflags & ACE_TYPE_FLAGS); | |
631 | if ((entry_type != ACE_OWNER && | |
632 | entry_type != (ACE_GROUP | ACE_IDENTIFIER_GROUP) && | |
633 | entry_type != ACE_EVERYONE)) { | |
634 | acep->a_who = zfs_fuid_map_id(zfsvfs, who, | |
635 | cr, (entry_type & ACE_IDENTIFIER_GROUP) ? | |
636 | ZFS_ACE_GROUP : ZFS_ACE_USER); | |
637 | } else { | |
638 | acep->a_who = (uid_t)(int64_t)who; | |
639 | } | |
640 | acep->a_access_mask = access_mask; | |
641 | acep->a_flags = iflags; | |
642 | acep->a_type = type; | |
643 | acep = (ace_t *)((caddr_t)acep + ace_size); | |
644 | } | |
645 | } | |
646 | ||
647 | static int | |
648 | zfs_copy_ace_2_oldace(vtype_t obj_type, zfs_acl_t *aclp, ace_t *acep, | |
649 | zfs_oldace_t *z_acl, int aclcnt, size_t *size) | |
650 | { | |
651 | int i; | |
652 | zfs_oldace_t *aceptr = z_acl; | |
653 | ||
654 | for (i = 0; i != aclcnt; i++, aceptr++) { | |
655 | aceptr->z_access_mask = acep[i].a_access_mask; | |
656 | aceptr->z_type = acep[i].a_type; | |
657 | aceptr->z_flags = acep[i].a_flags; | |
658 | aceptr->z_fuid = acep[i].a_who; | |
659 | /* | |
660 | * Make sure ACE is valid | |
661 | */ | |
662 | if (zfs_ace_valid(obj_type, aclp, aceptr->z_type, | |
663 | aceptr->z_flags) != B_TRUE) | |
664 | return (EINVAL); | |
665 | } | |
666 | *size = (caddr_t)aceptr - (caddr_t)z_acl; | |
667 | return (0); | |
668 | } | |
669 | ||
670 | /* | |
671 | * convert old ACL format to new | |
672 | */ | |
673 | void | |
674 | zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp) | |
675 | { | |
676 | zfs_oldace_t *oldaclp; | |
677 | int i; | |
678 | uint16_t type, iflags; | |
679 | uint32_t access_mask; | |
680 | uint64_t who; | |
681 | void *cookie = NULL; | |
682 | zfs_acl_node_t *newaclnode; | |
683 | ||
684 | ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL); | |
685 | /* | |
686 | * First create the ACE in a contiguous piece of memory | |
687 | * for zfs_copy_ace_2_fuid(). | |
688 | * | |
689 | * We only convert an ACL once, so this won't happen | |
690 | * everytime. | |
691 | */ | |
692 | oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count, | |
693 | KM_SLEEP); | |
694 | i = 0; | |
695 | while (cookie = zfs_acl_next_ace(aclp, cookie, &who, | |
696 | &access_mask, &iflags, &type)) { | |
697 | oldaclp[i].z_flags = iflags; | |
698 | oldaclp[i].z_type = type; | |
699 | oldaclp[i].z_fuid = who; | |
700 | oldaclp[i++].z_access_mask = access_mask; | |
701 | } | |
702 | ||
703 | newaclnode = zfs_acl_node_alloc(aclp->z_acl_count * | |
704 | sizeof (zfs_object_ace_t)); | |
705 | aclp->z_ops = zfs_acl_fuid_ops; | |
706 | VERIFY(zfs_copy_ace_2_fuid(ZTOV(zp)->v_type, aclp, oldaclp, | |
707 | newaclnode->z_acldata, aclp->z_acl_count, | |
708 | &newaclnode->z_size) == 0); | |
709 | newaclnode->z_ace_count = aclp->z_acl_count; | |
710 | aclp->z_version = ZFS_ACL_VERSION; | |
711 | kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t)); | |
712 | ||
713 | /* | |
714 | * Release all previous ACL nodes | |
715 | */ | |
716 | ||
717 | zfs_acl_release_nodes(aclp); | |
718 | ||
719 | list_insert_head(&aclp->z_acl, newaclnode); | |
720 | ||
721 | aclp->z_acl_bytes = newaclnode->z_size; | |
722 | aclp->z_acl_count = newaclnode->z_ace_count; | |
723 | ||
724 | } | |
725 | ||
726 | /* | |
727 | * Convert unix access mask to v4 access mask | |
728 | */ | |
729 | static uint32_t | |
730 | zfs_unix_to_v4(uint32_t access_mask) | |
731 | { | |
732 | uint32_t new_mask = 0; | |
733 | ||
734 | if (access_mask & S_IXOTH) | |
735 | new_mask |= ACE_EXECUTE; | |
736 | if (access_mask & S_IWOTH) | |
737 | new_mask |= ACE_WRITE_DATA; | |
738 | if (access_mask & S_IROTH) | |
739 | new_mask |= ACE_READ_DATA; | |
740 | return (new_mask); | |
741 | } | |
742 | ||
743 | static void | |
744 | zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask, | |
745 | uint16_t access_type, uint64_t fuid, uint16_t entry_type) | |
746 | { | |
747 | uint16_t type = entry_type & ACE_TYPE_FLAGS; | |
748 | ||
749 | aclp->z_ops.ace_mask_set(acep, access_mask); | |
750 | aclp->z_ops.ace_type_set(acep, access_type); | |
751 | aclp->z_ops.ace_flags_set(acep, entry_type); | |
752 | if ((type != ACE_OWNER && type != (ACE_GROUP | ACE_IDENTIFIER_GROUP) && | |
753 | type != ACE_EVERYONE)) | |
754 | aclp->z_ops.ace_who_set(acep, fuid); | |
755 | } | |
756 | ||
757 | /* | |
758 | * Determine mode of file based on ACL. | |
759 | * Also, create FUIDs for any User/Group ACEs | |
760 | */ | |
761 | static uint64_t | |
762 | zfs_mode_fuid_compute(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, | |
763 | zfs_fuid_info_t **fuidp, dmu_tx_t *tx) | |
764 | { | |
765 | int entry_type; | |
766 | mode_t mode; | |
767 | mode_t seen = 0; | |
768 | zfs_ace_hdr_t *acep = NULL; | |
769 | uint64_t who; | |
770 | uint16_t iflags, type; | |
771 | uint32_t access_mask; | |
772 | ||
773 | mode = (zp->z_phys->zp_mode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX)); | |
774 | ||
775 | while (acep = zfs_acl_next_ace(aclp, acep, &who, | |
776 | &access_mask, &iflags, &type)) { | |
777 | ||
778 | /* | |
779 | * Skip over inherit only ACEs | |
780 | */ | |
781 | if (iflags & ACE_INHERIT_ONLY_ACE) | |
782 | continue; | |
783 | ||
784 | entry_type = (iflags & ACE_TYPE_FLAGS); | |
785 | ||
786 | if (entry_type == ACE_OWNER) { | |
787 | if ((access_mask & ACE_READ_DATA) && | |
788 | (!(seen & S_IRUSR))) { | |
789 | seen |= S_IRUSR; | |
790 | if (type == ALLOW) { | |
791 | mode |= S_IRUSR; | |
792 | } | |
793 | } | |
794 | if ((access_mask & ACE_WRITE_DATA) && | |
795 | (!(seen & S_IWUSR))) { | |
796 | seen |= S_IWUSR; | |
797 | if (type == ALLOW) { | |
798 | mode |= S_IWUSR; | |
799 | } | |
800 | } | |
801 | if ((access_mask & ACE_EXECUTE) && | |
802 | (!(seen & S_IXUSR))) { | |
803 | seen |= S_IXUSR; | |
804 | if (type == ALLOW) { | |
805 | mode |= S_IXUSR; | |
806 | } | |
807 | } | |
808 | } else if (entry_type == OWNING_GROUP) { | |
809 | if ((access_mask & ACE_READ_DATA) && | |
810 | (!(seen & S_IRGRP))) { | |
811 | seen |= S_IRGRP; | |
812 | if (type == ALLOW) { | |
813 | mode |= S_IRGRP; | |
814 | } | |
815 | } | |
816 | if ((access_mask & ACE_WRITE_DATA) && | |
817 | (!(seen & S_IWGRP))) { | |
818 | seen |= S_IWGRP; | |
819 | if (type == ALLOW) { | |
820 | mode |= S_IWGRP; | |
821 | } | |
822 | } | |
823 | if ((access_mask & ACE_EXECUTE) && | |
824 | (!(seen & S_IXGRP))) { | |
825 | seen |= S_IXGRP; | |
826 | if (type == ALLOW) { | |
827 | mode |= S_IXGRP; | |
828 | } | |
829 | } | |
830 | } else if (entry_type == ACE_EVERYONE) { | |
831 | if ((access_mask & ACE_READ_DATA)) { | |
832 | if (!(seen & S_IRUSR)) { | |
833 | seen |= S_IRUSR; | |
834 | if (type == ALLOW) { | |
835 | mode |= S_IRUSR; | |
836 | } | |
837 | } | |
838 | if (!(seen & S_IRGRP)) { | |
839 | seen |= S_IRGRP; | |
840 | if (type == ALLOW) { | |
841 | mode |= S_IRGRP; | |
842 | } | |
843 | } | |
844 | if (!(seen & S_IROTH)) { | |
845 | seen |= S_IROTH; | |
846 | if (type == ALLOW) { | |
847 | mode |= S_IROTH; | |
848 | } | |
849 | } | |
850 | } | |
851 | if ((access_mask & ACE_WRITE_DATA)) { | |
852 | if (!(seen & S_IWUSR)) { | |
853 | seen |= S_IWUSR; | |
854 | if (type == ALLOW) { | |
855 | mode |= S_IWUSR; | |
856 | } | |
857 | } | |
858 | if (!(seen & S_IWGRP)) { | |
859 | seen |= S_IWGRP; | |
860 | if (type == ALLOW) { | |
861 | mode |= S_IWGRP; | |
862 | } | |
863 | } | |
864 | if (!(seen & S_IWOTH)) { | |
865 | seen |= S_IWOTH; | |
866 | if (type == ALLOW) { | |
867 | mode |= S_IWOTH; | |
868 | } | |
869 | } | |
870 | } | |
871 | if ((access_mask & ACE_EXECUTE)) { | |
872 | if (!(seen & S_IXUSR)) { | |
873 | seen |= S_IXUSR; | |
874 | if (type == ALLOW) { | |
875 | mode |= S_IXUSR; | |
876 | } | |
877 | } | |
878 | if (!(seen & S_IXGRP)) { | |
879 | seen |= S_IXGRP; | |
880 | if (type == ALLOW) { | |
881 | mode |= S_IXGRP; | |
882 | } | |
883 | } | |
884 | if (!(seen & S_IXOTH)) { | |
885 | seen |= S_IXOTH; | |
886 | if (type == ALLOW) { | |
887 | mode |= S_IXOTH; | |
888 | } | |
889 | } | |
890 | } | |
891 | } | |
892 | /* | |
893 | * Now handle FUID create for user/group ACEs | |
894 | */ | |
895 | if (entry_type == 0 || entry_type == ACE_IDENTIFIER_GROUP) { | |
896 | aclp->z_ops.ace_who_set(acep, | |
897 | zfs_fuid_create(zp->z_zfsvfs, who, cr, | |
898 | (entry_type == 0) ? ZFS_ACE_USER : ZFS_ACE_GROUP, | |
899 | tx, fuidp)); | |
900 | } | |
901 | } | |
902 | return (mode); | |
903 | } | |
904 | ||
905 | static zfs_acl_t * | |
906 | zfs_acl_node_read_internal(znode_t *zp, boolean_t will_modify) | |
907 | { | |
908 | zfs_acl_t *aclp; | |
909 | zfs_acl_node_t *aclnode; | |
910 | ||
911 | aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version); | |
912 | ||
913 | /* | |
914 | * Version 0 to 1 znode_acl_phys has the size/count fields swapped. | |
915 | * Version 0 didn't have a size field, only a count. | |
916 | */ | |
917 | if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) { | |
918 | aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_size; | |
919 | aclp->z_acl_bytes = ZFS_ACL_SIZE(aclp->z_acl_count); | |
920 | } else { | |
921 | aclp->z_acl_count = zp->z_phys->zp_acl.z_acl_count; | |
922 | aclp->z_acl_bytes = zp->z_phys->zp_acl.z_acl_size; | |
923 | } | |
924 | ||
925 | aclnode = zfs_acl_node_alloc(will_modify ? aclp->z_acl_bytes : 0); | |
926 | aclnode->z_ace_count = aclp->z_acl_count; | |
927 | if (will_modify) { | |
928 | bcopy(zp->z_phys->zp_acl.z_ace_data, aclnode->z_acldata, | |
929 | aclp->z_acl_bytes); | |
930 | } else { | |
931 | aclnode->z_size = aclp->z_acl_bytes; | |
932 | aclnode->z_acldata = &zp->z_phys->zp_acl.z_ace_data[0]; | |
933 | } | |
934 | ||
935 | list_insert_head(&aclp->z_acl, aclnode); | |
936 | ||
937 | return (aclp); | |
938 | } | |
939 | ||
940 | /* | |
941 | * Read an external acl object. | |
942 | */ | |
943 | static int | |
944 | zfs_acl_node_read(znode_t *zp, zfs_acl_t **aclpp, boolean_t will_modify) | |
945 | { | |
946 | uint64_t extacl = zp->z_phys->zp_acl.z_acl_extern_obj; | |
947 | zfs_acl_t *aclp; | |
948 | size_t aclsize; | |
949 | size_t acl_count; | |
950 | zfs_acl_node_t *aclnode; | |
951 | int error; | |
952 | ||
953 | ASSERT(MUTEX_HELD(&zp->z_acl_lock)); | |
954 | ||
955 | if (zp->z_phys->zp_acl.z_acl_extern_obj == 0) { | |
956 | *aclpp = zfs_acl_node_read_internal(zp, will_modify); | |
957 | return (0); | |
958 | } | |
959 | ||
960 | aclp = zfs_acl_alloc(zp->z_phys->zp_acl.z_acl_version); | |
961 | if (zp->z_phys->zp_acl.z_acl_version == ZFS_ACL_VERSION_INITIAL) { | |
962 | zfs_acl_phys_v0_t *zacl0 = | |
963 | (zfs_acl_phys_v0_t *)&zp->z_phys->zp_acl; | |
964 | ||
965 | aclsize = ZFS_ACL_SIZE(zacl0->z_acl_count); | |
966 | acl_count = zacl0->z_acl_count; | |
967 | } else { | |
968 | aclsize = zp->z_phys->zp_acl.z_acl_size; | |
969 | acl_count = zp->z_phys->zp_acl.z_acl_count; | |
970 | if (aclsize == 0) | |
971 | aclsize = acl_count * sizeof (zfs_ace_t); | |
972 | } | |
973 | aclnode = zfs_acl_node_alloc(aclsize); | |
974 | list_insert_head(&aclp->z_acl, aclnode); | |
975 | error = dmu_read(zp->z_zfsvfs->z_os, extacl, 0, | |
976 | aclsize, aclnode->z_acldata); | |
977 | aclnode->z_ace_count = acl_count; | |
978 | aclp->z_acl_count = acl_count; | |
979 | aclp->z_acl_bytes = aclsize; | |
980 | ||
981 | if (error != 0) { | |
982 | zfs_acl_free(aclp); | |
983 | return (error); | |
984 | } | |
985 | ||
986 | *aclpp = aclp; | |
987 | return (0); | |
988 | } | |
989 | ||
990 | /* | |
991 | * common code for setting ACLs. | |
992 | * | |
993 | * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl. | |
994 | * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's | |
995 | * already checked the acl and knows whether to inherit. | |
996 | */ | |
997 | int | |
998 | zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, | |
999 | zfs_fuid_info_t **fuidp, dmu_tx_t *tx) | |
1000 | { | |
1001 | int error; | |
1002 | znode_phys_t *zphys = zp->z_phys; | |
1003 | zfs_acl_phys_t *zacl = &zphys->zp_acl; | |
1004 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
1005 | uint64_t aoid = zphys->zp_acl.z_acl_extern_obj; | |
1006 | uint64_t off = 0; | |
1007 | dmu_object_type_t otype; | |
1008 | zfs_acl_node_t *aclnode; | |
1009 | ||
1010 | ASSERT(MUTEX_HELD(&zp->z_lock)); | |
1011 | ASSERT(MUTEX_HELD(&zp->z_acl_lock)); | |
1012 | ||
1013 | dmu_buf_will_dirty(zp->z_dbuf, tx); | |
1014 | ||
1015 | zphys->zp_mode = zfs_mode_fuid_compute(zp, aclp, cr, fuidp, tx); | |
1016 | ||
1017 | /* | |
1018 | * Decide which opbject type to use. If we are forced to | |
1019 | * use old ACL format than transform ACL into zfs_oldace_t | |
1020 | * layout. | |
1021 | */ | |
1022 | if (!zfsvfs->z_use_fuids) { | |
1023 | otype = DMU_OT_OLDACL; | |
1024 | } else { | |
1025 | if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) && | |
1026 | (zfsvfs->z_version >= ZPL_VERSION_FUID)) | |
1027 | zfs_acl_xform(zp, aclp); | |
1028 | ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID); | |
1029 | otype = DMU_OT_ACL; | |
1030 | } | |
1031 | ||
1032 | if (aclp->z_acl_bytes > ZFS_ACE_SPACE) { | |
1033 | /* | |
1034 | * If ACL was previously external and we are now | |
1035 | * converting to new ACL format then release old | |
1036 | * ACL object and create a new one. | |
1037 | */ | |
1038 | if (aoid && aclp->z_version != zacl->z_acl_version) { | |
1039 | error = dmu_object_free(zfsvfs->z_os, | |
1040 | zp->z_phys->zp_acl.z_acl_extern_obj, tx); | |
1041 | if (error) | |
1042 | return (error); | |
1043 | aoid = 0; | |
1044 | } | |
1045 | if (aoid == 0) { | |
1046 | aoid = dmu_object_alloc(zfsvfs->z_os, | |
1047 | otype, aclp->z_acl_bytes, | |
1048 | otype == DMU_OT_ACL ? DMU_OT_SYSACL : DMU_OT_NONE, | |
1049 | otype == DMU_OT_ACL ? DN_MAX_BONUSLEN : 0, tx); | |
1050 | } else { | |
1051 | (void) dmu_object_set_blocksize(zfsvfs->z_os, aoid, | |
1052 | aclp->z_acl_bytes, 0, tx); | |
1053 | } | |
1054 | zphys->zp_acl.z_acl_extern_obj = aoid; | |
1055 | for (aclnode = list_head(&aclp->z_acl); aclnode; | |
1056 | aclnode = list_next(&aclp->z_acl, aclnode)) { | |
1057 | if (aclnode->z_ace_count == 0) | |
1058 | continue; | |
1059 | dmu_write(zfsvfs->z_os, aoid, off, | |
1060 | aclnode->z_size, aclnode->z_acldata, tx); | |
1061 | off += aclnode->z_size; | |
1062 | } | |
1063 | } else { | |
1064 | void *start = zacl->z_ace_data; | |
1065 | /* | |
1066 | * Migrating back embedded? | |
1067 | */ | |
1068 | if (zphys->zp_acl.z_acl_extern_obj) { | |
1069 | error = dmu_object_free(zfsvfs->z_os, | |
1070 | zp->z_phys->zp_acl.z_acl_extern_obj, tx); | |
1071 | if (error) | |
1072 | return (error); | |
1073 | zphys->zp_acl.z_acl_extern_obj = 0; | |
1074 | } | |
1075 | ||
1076 | for (aclnode = list_head(&aclp->z_acl); aclnode; | |
1077 | aclnode = list_next(&aclp->z_acl, aclnode)) { | |
1078 | if (aclnode->z_ace_count == 0) | |
1079 | continue; | |
1080 | bcopy(aclnode->z_acldata, start, aclnode->z_size); | |
1081 | start = (caddr_t)start + aclnode->z_size; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * If Old version then swap count/bytes to match old | |
1087 | * layout of znode_acl_phys_t. | |
1088 | */ | |
1089 | if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) { | |
1090 | zphys->zp_acl.z_acl_size = aclp->z_acl_count; | |
1091 | zphys->zp_acl.z_acl_count = aclp->z_acl_bytes; | |
1092 | } else { | |
1093 | zphys->zp_acl.z_acl_size = aclp->z_acl_bytes; | |
1094 | zphys->zp_acl.z_acl_count = aclp->z_acl_count; | |
1095 | } | |
1096 | ||
1097 | zphys->zp_acl.z_acl_version = aclp->z_version; | |
1098 | ||
1099 | /* | |
1100 | * Replace ACL wide bits, but first clear them. | |
1101 | */ | |
1102 | zp->z_phys->zp_flags &= ~ZFS_ACL_WIDE_FLAGS; | |
1103 | ||
1104 | zp->z_phys->zp_flags |= aclp->z_hints; | |
1105 | ||
1106 | if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0) | |
1107 | zp->z_phys->zp_flags |= ZFS_ACL_TRIVIAL; | |
1108 | ||
1109 | zfs_time_stamper_locked(zp, STATE_CHANGED, tx); | |
1110 | return (0); | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * Update access mask for prepended ACE | |
1115 | * | |
1116 | * This applies the "groupmask" value for aclmode property. | |
1117 | */ | |
1118 | static void | |
1119 | zfs_acl_prepend_fixup(zfs_acl_t *aclp, void *acep, void *origacep, | |
1120 | mode_t mode, uint64_t owner) | |
1121 | { | |
1122 | int rmask, wmask, xmask; | |
1123 | int user_ace; | |
1124 | uint16_t aceflags; | |
1125 | uint32_t origmask, acepmask; | |
1126 | uint64_t fuid; | |
1127 | ||
1128 | aceflags = aclp->z_ops.ace_flags_get(acep); | |
1129 | fuid = aclp->z_ops.ace_who_get(acep); | |
1130 | origmask = aclp->z_ops.ace_mask_get(origacep); | |
1131 | acepmask = aclp->z_ops.ace_mask_get(acep); | |
1132 | ||
1133 | user_ace = (!(aceflags & | |
1134 | (ACE_OWNER|ACE_GROUP|ACE_IDENTIFIER_GROUP))); | |
1135 | ||
1136 | if (user_ace && (fuid == owner)) { | |
1137 | rmask = S_IRUSR; | |
1138 | wmask = S_IWUSR; | |
1139 | xmask = S_IXUSR; | |
1140 | } else { | |
1141 | rmask = S_IRGRP; | |
1142 | wmask = S_IWGRP; | |
1143 | xmask = S_IXGRP; | |
1144 | } | |
1145 | ||
1146 | if (origmask & ACE_READ_DATA) { | |
1147 | if (mode & rmask) { | |
1148 | acepmask &= ~ACE_READ_DATA; | |
1149 | } else { | |
1150 | acepmask |= ACE_READ_DATA; | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | if (origmask & ACE_WRITE_DATA) { | |
1155 | if (mode & wmask) { | |
1156 | acepmask &= ~ACE_WRITE_DATA; | |
1157 | } else { | |
1158 | acepmask |= ACE_WRITE_DATA; | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | if (origmask & ACE_APPEND_DATA) { | |
1163 | if (mode & wmask) { | |
1164 | acepmask &= ~ACE_APPEND_DATA; | |
1165 | } else { | |
1166 | acepmask |= ACE_APPEND_DATA; | |
1167 | } | |
1168 | } | |
1169 | ||
1170 | if (origmask & ACE_EXECUTE) { | |
1171 | if (mode & xmask) { | |
1172 | acepmask &= ~ACE_EXECUTE; | |
1173 | } else { | |
1174 | acepmask |= ACE_EXECUTE; | |
1175 | } | |
1176 | } | |
1177 | aclp->z_ops.ace_mask_set(acep, acepmask); | |
1178 | } | |
1179 | ||
1180 | /* | |
1181 | * Apply mode to canonical six ACEs. | |
1182 | */ | |
1183 | static void | |
1184 | zfs_acl_fixup_canonical_six(zfs_acl_t *aclp, mode_t mode) | |
1185 | { | |
1186 | zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl); | |
1187 | void *acep; | |
1188 | int maskoff = aclp->z_ops.ace_mask_off(); | |
1189 | size_t abstract_size = aclp->z_ops.ace_abstract_size(); | |
1190 | ||
1191 | ASSERT(aclnode != NULL); | |
1192 | ||
1193 | acep = (void *)((caddr_t)aclnode->z_acldata + | |
1194 | aclnode->z_size - (abstract_size * 6)); | |
1195 | ||
1196 | /* | |
1197 | * Fixup final ACEs to match the mode | |
1198 | */ | |
1199 | ||
1200 | adjust_ace_pair_common(acep, maskoff, abstract_size, | |
1201 | (mode & 0700) >> 6); /* owner@ */ | |
1202 | ||
1203 | acep = (caddr_t)acep + (abstract_size * 2); | |
1204 | ||
1205 | adjust_ace_pair_common(acep, maskoff, abstract_size, | |
1206 | (mode & 0070) >> 3); /* group@ */ | |
1207 | ||
1208 | acep = (caddr_t)acep + (abstract_size * 2); | |
1209 | adjust_ace_pair_common(acep, maskoff, | |
1210 | abstract_size, mode); /* everyone@ */ | |
1211 | } | |
1212 | ||
1213 | ||
1214 | static int | |
1215 | zfs_acl_ace_match(zfs_acl_t *aclp, void *acep, int allow_deny, | |
1216 | int entry_type, int accessmask) | |
1217 | { | |
1218 | uint32_t mask = aclp->z_ops.ace_mask_get(acep); | |
1219 | uint16_t type = aclp->z_ops.ace_type_get(acep); | |
1220 | uint16_t flags = aclp->z_ops.ace_flags_get(acep); | |
1221 | ||
1222 | return (mask == accessmask && type == allow_deny && | |
1223 | ((flags & ACE_TYPE_FLAGS) == entry_type)); | |
1224 | } | |
1225 | ||
1226 | /* | |
1227 | * Can prepended ACE be reused? | |
1228 | */ | |
1229 | static int | |
1230 | zfs_reuse_deny(zfs_acl_t *aclp, void *acep, void *prevacep) | |
1231 | { | |
1232 | int okay_masks; | |
1233 | uint16_t prevtype; | |
1234 | uint16_t prevflags; | |
1235 | uint16_t flags; | |
1236 | uint32_t mask, prevmask; | |
1237 | ||
1238 | if (prevacep == NULL) | |
1239 | return (B_FALSE); | |
1240 | ||
1241 | prevtype = aclp->z_ops.ace_type_get(prevacep); | |
1242 | prevflags = aclp->z_ops.ace_flags_get(prevacep); | |
1243 | flags = aclp->z_ops.ace_flags_get(acep); | |
1244 | mask = aclp->z_ops.ace_mask_get(acep); | |
1245 | prevmask = aclp->z_ops.ace_mask_get(prevacep); | |
1246 | ||
1247 | if (prevtype != DENY) | |
1248 | return (B_FALSE); | |
1249 | ||
1250 | if (prevflags != (flags & ACE_IDENTIFIER_GROUP)) | |
1251 | return (B_FALSE); | |
1252 | ||
1253 | okay_masks = (mask & OKAY_MASK_BITS); | |
1254 | ||
1255 | if (prevmask & ~okay_masks) | |
1256 | return (B_FALSE); | |
1257 | ||
1258 | return (B_TRUE); | |
1259 | } | |
1260 | ||
1261 | ||
1262 | /* | |
1263 | * Insert new ACL node into chain of zfs_acl_node_t's | |
1264 | * | |
1265 | * This will result in two possible results. | |
1266 | * 1. If the ACL is currently just a single zfs_acl_node and | |
1267 | * we are prepending the entry then current acl node will have | |
1268 | * a new node inserted above it. | |
1269 | * | |
1270 | * 2. If we are inserting in the middle of current acl node then | |
1271 | * the current node will be split in two and new node will be inserted | |
1272 | * in between the two split nodes. | |
1273 | */ | |
1274 | static zfs_acl_node_t * | |
1275 | zfs_acl_ace_insert(zfs_acl_t *aclp, void *acep) | |
1276 | { | |
1277 | zfs_acl_node_t *newnode; | |
1278 | zfs_acl_node_t *trailernode = NULL; | |
1279 | zfs_acl_node_t *currnode = zfs_acl_curr_node(aclp); | |
1280 | int curr_idx = aclp->z_curr_node->z_ace_idx; | |
1281 | int trailer_count; | |
1282 | size_t oldsize; | |
1283 | ||
1284 | newnode = zfs_acl_node_alloc(aclp->z_ops.ace_size(acep)); | |
1285 | newnode->z_ace_count = 1; | |
1286 | ||
1287 | oldsize = currnode->z_size; | |
1288 | ||
1289 | if (curr_idx != 1) { | |
1290 | trailernode = zfs_acl_node_alloc(0); | |
1291 | trailernode->z_acldata = acep; | |
1292 | ||
1293 | trailer_count = currnode->z_ace_count - curr_idx + 1; | |
1294 | currnode->z_ace_count = curr_idx - 1; | |
1295 | currnode->z_size = (caddr_t)acep - (caddr_t)currnode->z_acldata; | |
1296 | trailernode->z_size = oldsize - currnode->z_size; | |
1297 | trailernode->z_ace_count = trailer_count; | |
1298 | } | |
1299 | ||
1300 | aclp->z_acl_count += 1; | |
1301 | aclp->z_acl_bytes += aclp->z_ops.ace_size(acep); | |
1302 | ||
1303 | if (curr_idx == 1) | |
1304 | list_insert_before(&aclp->z_acl, currnode, newnode); | |
1305 | else | |
1306 | list_insert_after(&aclp->z_acl, currnode, newnode); | |
1307 | if (trailernode) { | |
1308 | list_insert_after(&aclp->z_acl, newnode, trailernode); | |
1309 | aclp->z_curr_node = trailernode; | |
1310 | trailernode->z_ace_idx = 1; | |
1311 | } | |
1312 | ||
1313 | return (newnode); | |
1314 | } | |
1315 | ||
1316 | /* | |
1317 | * Prepend deny ACE | |
1318 | */ | |
1319 | static void * | |
1320 | zfs_acl_prepend_deny(znode_t *zp, zfs_acl_t *aclp, void *acep, | |
1321 | mode_t mode) | |
1322 | { | |
1323 | zfs_acl_node_t *aclnode; | |
1324 | void *newacep; | |
1325 | uint64_t fuid; | |
1326 | uint16_t flags; | |
1327 | ||
1328 | aclnode = zfs_acl_ace_insert(aclp, acep); | |
1329 | newacep = aclnode->z_acldata; | |
1330 | fuid = aclp->z_ops.ace_who_get(acep); | |
1331 | flags = aclp->z_ops.ace_flags_get(acep); | |
1332 | zfs_set_ace(aclp, newacep, 0, DENY, fuid, (flags & ACE_TYPE_FLAGS)); | |
1333 | zfs_acl_prepend_fixup(aclp, newacep, acep, mode, zp->z_phys->zp_uid); | |
1334 | ||
1335 | return (newacep); | |
1336 | } | |
1337 | ||
1338 | /* | |
1339 | * Split an inherited ACE into inherit_only ACE | |
1340 | * and original ACE with inheritance flags stripped off. | |
1341 | */ | |
1342 | static void | |
1343 | zfs_acl_split_ace(zfs_acl_t *aclp, zfs_ace_hdr_t *acep) | |
1344 | { | |
1345 | zfs_acl_node_t *aclnode; | |
1346 | zfs_acl_node_t *currnode; | |
1347 | void *newacep; | |
1348 | uint16_t type, flags; | |
1349 | uint32_t mask; | |
1350 | uint64_t fuid; | |
1351 | ||
1352 | type = aclp->z_ops.ace_type_get(acep); | |
1353 | flags = aclp->z_ops.ace_flags_get(acep); | |
1354 | mask = aclp->z_ops.ace_mask_get(acep); | |
1355 | fuid = aclp->z_ops.ace_who_get(acep); | |
1356 | ||
1357 | aclnode = zfs_acl_ace_insert(aclp, acep); | |
1358 | newacep = aclnode->z_acldata; | |
1359 | ||
1360 | aclp->z_ops.ace_type_set(newacep, type); | |
1361 | aclp->z_ops.ace_flags_set(newacep, flags | ACE_INHERIT_ONLY_ACE); | |
1362 | aclp->z_ops.ace_mask_set(newacep, mask); | |
1363 | aclp->z_ops.ace_type_set(newacep, type); | |
1364 | aclp->z_ops.ace_who_set(newacep, fuid); | |
1365 | aclp->z_next_ace = acep; | |
1366 | flags &= ~ALL_INHERIT; | |
1367 | aclp->z_ops.ace_flags_set(acep, flags); | |
1368 | currnode = zfs_acl_curr_node(aclp); | |
1369 | ASSERT(currnode->z_ace_idx >= 1); | |
1370 | currnode->z_ace_idx -= 1; | |
1371 | } | |
1372 | ||
1373 | /* | |
1374 | * Are ACES started at index i, the canonical six ACES? | |
1375 | */ | |
1376 | static int | |
1377 | zfs_have_canonical_six(zfs_acl_t *aclp) | |
1378 | { | |
1379 | void *acep; | |
1380 | zfs_acl_node_t *aclnode = list_tail(&aclp->z_acl); | |
1381 | int i = 0; | |
1382 | size_t abstract_size = aclp->z_ops.ace_abstract_size(); | |
1383 | ||
1384 | ASSERT(aclnode != NULL); | |
1385 | ||
1386 | if (aclnode->z_ace_count < 6) | |
1387 | return (0); | |
1388 | ||
1389 | acep = (void *)((caddr_t)aclnode->z_acldata + | |
1390 | aclnode->z_size - (aclp->z_ops.ace_abstract_size() * 6)); | |
1391 | ||
1392 | if ((zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++), | |
1393 | DENY, ACE_OWNER, 0) && | |
1394 | zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++), | |
1395 | ALLOW, ACE_OWNER, OWNER_ALLOW_MASK) && | |
1396 | zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++), DENY, | |
1397 | OWNING_GROUP, 0) && zfs_acl_ace_match(aclp, (caddr_t)acep + | |
1398 | (abstract_size * i++), | |
1399 | ALLOW, OWNING_GROUP, 0) && | |
1400 | zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++), | |
1401 | DENY, ACE_EVERYONE, EVERYONE_DENY_MASK) && | |
1402 | zfs_acl_ace_match(aclp, (caddr_t)acep + (abstract_size * i++), | |
1403 | ALLOW, ACE_EVERYONE, EVERYONE_ALLOW_MASK))) { | |
1404 | return (1); | |
1405 | } else { | |
1406 | return (0); | |
1407 | } | |
1408 | } | |
1409 | ||
1410 | ||
1411 | /* | |
1412 | * Apply step 1g, to group entries | |
1413 | * | |
1414 | * Need to deal with corner case where group may have | |
1415 | * greater permissions than owner. If so then limit | |
1416 | * group permissions, based on what extra permissions | |
1417 | * group has. | |
1418 | */ | |
1419 | static void | |
1420 | zfs_fixup_group_entries(zfs_acl_t *aclp, void *acep, void *prevacep, | |
1421 | mode_t mode) | |
1422 | { | |
1423 | uint32_t prevmask = aclp->z_ops.ace_mask_get(prevacep); | |
1424 | uint32_t mask = aclp->z_ops.ace_mask_get(acep); | |
1425 | uint16_t prevflags = aclp->z_ops.ace_flags_get(prevacep); | |
1426 | mode_t extramode = (mode >> 3) & 07; | |
1427 | mode_t ownermode = (mode >> 6); | |
1428 | ||
1429 | if (prevflags & ACE_IDENTIFIER_GROUP) { | |
1430 | ||
1431 | extramode &= ~ownermode; | |
1432 | ||
1433 | if (extramode) { | |
1434 | if (extramode & S_IROTH) { | |
1435 | prevmask &= ~ACE_READ_DATA; | |
1436 | mask &= ~ACE_READ_DATA; | |
1437 | } | |
1438 | if (extramode & S_IWOTH) { | |
1439 | prevmask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA); | |
1440 | mask &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA); | |
1441 | } | |
1442 | if (extramode & S_IXOTH) { | |
1443 | prevmask &= ~ACE_EXECUTE; | |
1444 | mask &= ~ACE_EXECUTE; | |
1445 | } | |
1446 | } | |
1447 | } | |
1448 | aclp->z_ops.ace_mask_set(acep, mask); | |
1449 | aclp->z_ops.ace_mask_set(prevacep, prevmask); | |
1450 | } | |
1451 | ||
1452 | /* | |
1453 | * Apply the chmod algorithm as described | |
1454 | * in PSARC/2002/240 | |
1455 | */ | |
1456 | static void | |
1457 | zfs_acl_chmod(znode_t *zp, uint64_t mode, zfs_acl_t *aclp) | |
1458 | { | |
1459 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
1460 | void *acep = NULL, *prevacep = NULL; | |
1461 | uint64_t who; | |
1462 | int i; | |
1463 | int entry_type; | |
1464 | int reuse_deny; | |
1465 | int need_canonical_six = 1; | |
1466 | uint16_t iflags, type; | |
1467 | uint32_t access_mask; | |
1468 | ||
1469 | ASSERT(MUTEX_HELD(&zp->z_acl_lock)); | |
1470 | ASSERT(MUTEX_HELD(&zp->z_lock)); | |
1471 | ||
1472 | aclp->z_hints = (zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS); | |
1473 | ||
1474 | /* | |
1475 | * If discard then just discard all ACL nodes which | |
1476 | * represent the ACEs. | |
1477 | * | |
1478 | * New owner@/group@/everone@ ACEs will be added | |
1479 | * later. | |
1480 | */ | |
1481 | if (zfsvfs->z_acl_mode == ZFS_ACL_DISCARD) | |
1482 | zfs_acl_release_nodes(aclp); | |
1483 | ||
1484 | while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask, | |
1485 | &iflags, &type)) { | |
1486 | ||
1487 | entry_type = (iflags & ACE_TYPE_FLAGS); | |
1488 | iflags = (iflags & ALL_INHERIT); | |
1489 | ||
1490 | if ((type != ALLOW && type != DENY) || | |
1491 | (iflags & ACE_INHERIT_ONLY_ACE)) { | |
1492 | if (iflags) | |
1493 | aclp->z_hints |= ZFS_INHERIT_ACE; | |
1494 | switch (type) { | |
1495 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
1496 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
1497 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
1498 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
1499 | aclp->z_hints |= ZFS_ACL_OBJ_ACE; | |
1500 | break; | |
1501 | } | |
1502 | goto nextace; | |
1503 | } | |
1504 | ||
1505 | /* | |
1506 | * Need to split ace into two? | |
1507 | */ | |
1508 | if ((iflags & (ACE_FILE_INHERIT_ACE| | |
1509 | ACE_DIRECTORY_INHERIT_ACE)) && | |
1510 | (!(iflags & ACE_INHERIT_ONLY_ACE))) { | |
1511 | zfs_acl_split_ace(aclp, acep); | |
1512 | aclp->z_hints |= ZFS_INHERIT_ACE; | |
1513 | goto nextace; | |
1514 | } | |
1515 | ||
1516 | if (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE || | |
1517 | (entry_type == OWNING_GROUP)) { | |
1518 | access_mask &= ~OGE_CLEAR; | |
1519 | aclp->z_ops.ace_mask_set(acep, access_mask); | |
1520 | goto nextace; | |
1521 | } else { | |
1522 | reuse_deny = B_TRUE; | |
1523 | if (type == ALLOW) { | |
1524 | ||
1525 | /* | |
1526 | * Check preceding ACE if any, to see | |
1527 | * if we need to prepend a DENY ACE. | |
1528 | * This is only applicable when the acl_mode | |
1529 | * property == groupmask. | |
1530 | */ | |
1531 | if (zfsvfs->z_acl_mode == ZFS_ACL_GROUPMASK) { | |
1532 | ||
1533 | reuse_deny = zfs_reuse_deny(aclp, acep, | |
1534 | prevacep); | |
1535 | ||
1536 | if (!reuse_deny) { | |
1537 | prevacep = | |
1538 | zfs_acl_prepend_deny(zp, | |
1539 | aclp, acep, mode); | |
1540 | } else { | |
1541 | zfs_acl_prepend_fixup( | |
1542 | aclp, prevacep, | |
1543 | acep, mode, | |
1544 | zp->z_phys->zp_uid); | |
1545 | } | |
1546 | zfs_fixup_group_entries(aclp, acep, | |
1547 | prevacep, mode); | |
1548 | ||
1549 | } | |
1550 | } | |
1551 | } | |
1552 | nextace: | |
1553 | prevacep = acep; | |
1554 | } | |
1555 | ||
1556 | /* | |
1557 | * Check out last six aces, if we have six. | |
1558 | */ | |
1559 | ||
1560 | if (aclp->z_acl_count >= 6) { | |
1561 | if (zfs_have_canonical_six(aclp)) { | |
1562 | need_canonical_six = 0; | |
1563 | } | |
1564 | } | |
1565 | ||
1566 | if (need_canonical_six) { | |
1567 | size_t abstract_size = aclp->z_ops.ace_abstract_size(); | |
1568 | void *zacep; | |
1569 | zfs_acl_node_t *aclnode = | |
1570 | zfs_acl_node_alloc(abstract_size * 6); | |
1571 | ||
1572 | aclnode->z_size = abstract_size * 6; | |
1573 | aclnode->z_ace_count = 6; | |
1574 | aclp->z_acl_bytes += aclnode->z_size; | |
1575 | list_insert_tail(&aclp->z_acl, aclnode); | |
1576 | ||
1577 | zacep = aclnode->z_acldata; | |
1578 | ||
1579 | i = 0; | |
1580 | zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), | |
1581 | 0, DENY, -1, ACE_OWNER); | |
1582 | zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), | |
1583 | OWNER_ALLOW_MASK, ALLOW, -1, ACE_OWNER); | |
1584 | zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0, | |
1585 | DENY, -1, OWNING_GROUP); | |
1586 | zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), 0, | |
1587 | ALLOW, -1, OWNING_GROUP); | |
1588 | zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), | |
1589 | EVERYONE_DENY_MASK, DENY, -1, ACE_EVERYONE); | |
1590 | zfs_set_ace(aclp, (caddr_t)zacep + (abstract_size * i++), | |
1591 | EVERYONE_ALLOW_MASK, ALLOW, -1, ACE_EVERYONE); | |
1592 | aclp->z_acl_count += 6; | |
1593 | } | |
1594 | ||
1595 | zfs_acl_fixup_canonical_six(aclp, mode); | |
1596 | } | |
1597 | ||
1598 | int | |
1599 | zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode) | |
1600 | { | |
1601 | int error; | |
1602 | ||
1603 | mutex_enter(&zp->z_lock); | |
1604 | mutex_enter(&zp->z_acl_lock); | |
1605 | *aclp = NULL; | |
1606 | error = zfs_acl_node_read(zp, aclp, B_TRUE); | |
1607 | if (error == 0) | |
1608 | zfs_acl_chmod(zp, mode, *aclp); | |
1609 | mutex_exit(&zp->z_acl_lock); | |
1610 | mutex_exit(&zp->z_lock); | |
1611 | return (error); | |
1612 | } | |
1613 | ||
1614 | /* | |
1615 | * strip off write_owner and write_acl | |
1616 | */ | |
1617 | static void | |
1618 | zfs_restricted_update(zfsvfs_t *zfsvfs, zfs_acl_t *aclp, void *acep) | |
1619 | { | |
1620 | uint32_t mask = aclp->z_ops.ace_mask_get(acep); | |
1621 | ||
1622 | if ((zfsvfs->z_acl_inherit == ZFS_ACL_RESTRICTED) && | |
1623 | (aclp->z_ops.ace_type_get(acep) == ALLOW)) { | |
1624 | mask &= ~RESTRICTED_CLEAR; | |
1625 | aclp->z_ops.ace_mask_set(acep, mask); | |
1626 | } | |
1627 | } | |
1628 | ||
1629 | /* | |
1630 | * Should ACE be inherited? | |
1631 | */ | |
1632 | static int | |
1633 | zfs_ace_can_use(znode_t *zp, uint16_t acep_flags) | |
1634 | { | |
1635 | int vtype = ZTOV(zp)->v_type; | |
1636 | int iflags = (acep_flags & 0xf); | |
1637 | ||
1638 | if ((vtype == VDIR) && (iflags & ACE_DIRECTORY_INHERIT_ACE)) | |
1639 | return (1); | |
1640 | else if (iflags & ACE_FILE_INHERIT_ACE) | |
1641 | return (!((vtype == VDIR) && | |
1642 | (iflags & ACE_NO_PROPAGATE_INHERIT_ACE))); | |
1643 | return (0); | |
1644 | } | |
1645 | ||
1646 | /* | |
1647 | * inherit inheritable ACEs from parent | |
1648 | */ | |
1649 | static zfs_acl_t * | |
1650 | zfs_acl_inherit(znode_t *zp, zfs_acl_t *paclp, boolean_t *need_chmod) | |
1651 | { | |
1652 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
1653 | void *pacep; | |
1654 | void *acep, *acep2; | |
1655 | zfs_acl_node_t *aclnode, *aclnode2; | |
1656 | zfs_acl_t *aclp = NULL; | |
1657 | uint64_t who; | |
1658 | uint32_t access_mask; | |
1659 | uint16_t iflags, newflags, type; | |
1660 | size_t ace_size; | |
1661 | void *data1, *data2; | |
1662 | size_t data1sz, data2sz; | |
1663 | enum vtype vntype = ZTOV(zp)->v_type; | |
1664 | ||
1665 | *need_chmod = B_TRUE; | |
1666 | pacep = NULL; | |
1667 | aclp = zfs_acl_alloc(zfs_acl_version_zp(zp)); | |
1668 | if (zfsvfs->z_acl_inherit != ZFS_ACL_DISCARD) { | |
1669 | while (pacep = zfs_acl_next_ace(paclp, pacep, &who, | |
1670 | &access_mask, &iflags, &type)) { | |
1671 | ||
1672 | if (zfsvfs->z_acl_inherit == ZFS_ACL_NOALLOW && | |
1673 | type == ALLOW) | |
1674 | continue; | |
1675 | ||
1676 | ace_size = aclp->z_ops.ace_size(pacep); | |
1677 | ||
1678 | if (!zfs_ace_can_use(zp, iflags)) | |
1679 | continue; | |
1680 | ||
1681 | /* | |
1682 | * If owner@, group@, or everyone@ inheritable | |
1683 | * then zfs_acl_chmod() isn't needed. | |
1684 | */ | |
1685 | if (zfsvfs->z_acl_inherit == | |
1686 | ZFS_ACL_PASSTHROUGH && | |
1687 | ((iflags & (ACE_OWNER|ACE_EVERYONE)) || | |
1688 | ((iflags & OWNING_GROUP) == | |
1689 | OWNING_GROUP)) && (vntype == VREG || | |
1690 | (vntype == VDIR && | |
1691 | (iflags & ACE_DIRECTORY_INHERIT_ACE)))) | |
1692 | *need_chmod = B_FALSE; | |
1693 | ||
1694 | aclnode = zfs_acl_node_alloc(ace_size); | |
1695 | list_insert_tail(&aclp->z_acl, aclnode); | |
1696 | acep = aclnode->z_acldata; | |
1697 | zfs_set_ace(aclp, acep, access_mask, type, | |
1698 | who, iflags|ACE_INHERITED_ACE); | |
1699 | ||
1700 | /* | |
1701 | * Copy special opaque data if any | |
1702 | */ | |
1703 | if ((data1sz = paclp->z_ops.ace_data(pacep, | |
1704 | &data1)) != 0) { | |
1705 | VERIFY((data2sz = aclp->z_ops.ace_data(acep, | |
1706 | &data2)) == data1sz); | |
1707 | bcopy(data1, data2, data2sz); | |
1708 | } | |
1709 | aclp->z_acl_count++; | |
1710 | aclnode->z_ace_count++; | |
1711 | aclp->z_acl_bytes += aclnode->z_size; | |
1712 | newflags = aclp->z_ops.ace_flags_get(acep); | |
1713 | ||
1714 | if (vntype == VDIR) | |
1715 | aclp->z_hints |= ZFS_INHERIT_ACE; | |
1716 | ||
1717 | if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || | |
1718 | (vntype != VDIR)) { | |
1719 | newflags &= ~ALL_INHERIT; | |
1720 | aclp->z_ops.ace_flags_set(acep, | |
1721 | newflags|ACE_INHERITED_ACE); | |
1722 | zfs_restricted_update(zfsvfs, aclp, acep); | |
1723 | continue; | |
1724 | } | |
1725 | ||
1726 | ASSERT(vntype == VDIR); | |
1727 | ||
1728 | newflags = aclp->z_ops.ace_flags_get(acep); | |
1729 | if ((iflags & (ACE_FILE_INHERIT_ACE | | |
1730 | ACE_DIRECTORY_INHERIT_ACE)) != | |
1731 | ACE_FILE_INHERIT_ACE) { | |
1732 | aclnode2 = zfs_acl_node_alloc(ace_size); | |
1733 | list_insert_tail(&aclp->z_acl, aclnode2); | |
1734 | acep2 = aclnode2->z_acldata; | |
1735 | zfs_set_ace(aclp, acep2, | |
1736 | access_mask, type, who, | |
1737 | iflags|ACE_INHERITED_ACE); | |
1738 | newflags |= ACE_INHERIT_ONLY_ACE; | |
1739 | aclp->z_ops.ace_flags_set(acep, newflags); | |
1740 | newflags &= ~ALL_INHERIT; | |
1741 | aclp->z_ops.ace_flags_set(acep2, | |
1742 | newflags|ACE_INHERITED_ACE); | |
1743 | ||
1744 | /* | |
1745 | * Copy special opaque data if any | |
1746 | */ | |
1747 | if ((data1sz = aclp->z_ops.ace_data(acep, | |
1748 | &data1)) != 0) { | |
1749 | VERIFY((data2sz = | |
1750 | aclp->z_ops.ace_data(acep2, | |
1751 | &data2)) == data1sz); | |
1752 | bcopy(data1, data2, data1sz); | |
1753 | } | |
1754 | aclp->z_acl_count++; | |
1755 | aclnode2->z_ace_count++; | |
1756 | aclp->z_acl_bytes += aclnode->z_size; | |
1757 | zfs_restricted_update(zfsvfs, aclp, acep2); | |
1758 | } else { | |
1759 | newflags |= ACE_INHERIT_ONLY_ACE; | |
1760 | aclp->z_ops.ace_flags_set(acep, | |
1761 | newflags|ACE_INHERITED_ACE); | |
1762 | } | |
1763 | } | |
1764 | } | |
1765 | return (aclp); | |
1766 | } | |
1767 | ||
1768 | /* | |
1769 | * Create file system object initial permissions | |
1770 | * including inheritable ACEs. | |
1771 | */ | |
1772 | void | |
1773 | zfs_perm_init(znode_t *zp, znode_t *parent, int flag, | |
1774 | vattr_t *vap, dmu_tx_t *tx, cred_t *cr, | |
1775 | zfs_acl_t *setaclp, zfs_fuid_info_t **fuidp) | |
1776 | { | |
1777 | uint64_t mode, fuid, fgid; | |
1778 | int error; | |
1779 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
1780 | zfs_acl_t *aclp = NULL; | |
1781 | zfs_acl_t *paclp; | |
1782 | xvattr_t *xvap = (xvattr_t *)vap; | |
1783 | gid_t gid; | |
1784 | boolean_t need_chmod = B_TRUE; | |
1785 | ||
1786 | if (setaclp) | |
1787 | aclp = setaclp; | |
1788 | ||
1789 | mode = MAKEIMODE(vap->va_type, vap->va_mode); | |
1790 | ||
1791 | /* | |
1792 | * Determine uid and gid. | |
1793 | */ | |
1794 | if ((flag & (IS_ROOT_NODE | IS_REPLAY)) || | |
1795 | ((flag & IS_XATTR) && (vap->va_type == VDIR))) { | |
1796 | fuid = zfs_fuid_create(zfsvfs, vap->va_uid, cr, | |
1797 | ZFS_OWNER, tx, fuidp); | |
1798 | fgid = zfs_fuid_create(zfsvfs, vap->va_gid, cr, | |
1799 | ZFS_GROUP, tx, fuidp); | |
1800 | gid = vap->va_gid; | |
1801 | } else { | |
1802 | fuid = zfs_fuid_create_cred(zfsvfs, ZFS_OWNER, tx, cr, fuidp); | |
1803 | fgid = 0; | |
1804 | if (vap->va_mask & AT_GID) { | |
1805 | fgid = zfs_fuid_create(zfsvfs, vap->va_gid, cr, | |
1806 | ZFS_GROUP, tx, fuidp); | |
1807 | gid = vap->va_gid; | |
1808 | if (fgid != parent->z_phys->zp_gid && | |
1809 | !groupmember(vap->va_gid, cr) && | |
1810 | secpolicy_vnode_create_gid(cr) != 0) | |
1811 | fgid = 0; | |
1812 | } | |
1813 | if (fgid == 0) { | |
1814 | if (parent->z_phys->zp_mode & S_ISGID) { | |
1815 | fgid = parent->z_phys->zp_gid; | |
1816 | gid = zfs_fuid_map_id(zfsvfs, fgid, | |
1817 | cr, ZFS_GROUP); | |
1818 | } else { | |
1819 | fgid = zfs_fuid_create_cred(zfsvfs, | |
1820 | ZFS_GROUP, tx, cr, fuidp); | |
1821 | gid = crgetgid(cr); | |
1822 | } | |
1823 | } | |
1824 | } | |
1825 | ||
1826 | /* | |
1827 | * If we're creating a directory, and the parent directory has the | |
1828 | * set-GID bit set, set in on the new directory. | |
1829 | * Otherwise, if the user is neither privileged nor a member of the | |
1830 | * file's new group, clear the file's set-GID bit. | |
1831 | */ | |
1832 | ||
1833 | if ((parent->z_phys->zp_mode & S_ISGID) && (vap->va_type == VDIR)) { | |
1834 | mode |= S_ISGID; | |
1835 | } else { | |
1836 | if ((mode & S_ISGID) && | |
1837 | secpolicy_vnode_setids_setgids(cr, gid) != 0) | |
1838 | mode &= ~S_ISGID; | |
1839 | } | |
1840 | ||
1841 | zp->z_phys->zp_uid = fuid; | |
1842 | zp->z_phys->zp_gid = fgid; | |
1843 | zp->z_phys->zp_mode = mode; | |
1844 | ||
1845 | if (aclp == NULL) { | |
1846 | mutex_enter(&parent->z_lock); | |
1847 | if (parent->z_phys->zp_flags & ZFS_INHERIT_ACE) { | |
1848 | mutex_enter(&parent->z_acl_lock); | |
1849 | VERIFY(0 == zfs_acl_node_read(parent, &paclp, B_FALSE)); | |
1850 | mutex_exit(&parent->z_acl_lock); | |
1851 | aclp = zfs_acl_inherit(zp, paclp, &need_chmod); | |
1852 | zfs_acl_free(paclp); | |
1853 | } else { | |
1854 | aclp = zfs_acl_alloc(zfs_acl_version_zp(zp)); | |
1855 | } | |
1856 | mutex_exit(&parent->z_lock); | |
1857 | mutex_enter(&zp->z_lock); | |
1858 | mutex_enter(&zp->z_acl_lock); | |
1859 | if (need_chmod) | |
1860 | zfs_acl_chmod(zp, mode, aclp); | |
1861 | } else { | |
1862 | mutex_enter(&zp->z_lock); | |
1863 | mutex_enter(&zp->z_acl_lock); | |
1864 | } | |
1865 | ||
1866 | /* Force auto_inherit on all new directory objects */ | |
1867 | if (vap->va_type == VDIR) | |
1868 | aclp->z_hints |= ZFS_ACL_AUTO_INHERIT; | |
1869 | ||
1870 | error = zfs_aclset_common(zp, aclp, cr, fuidp, tx); | |
1871 | ||
1872 | /* Set optional attributes if any */ | |
1873 | if (vap->va_mask & AT_XVATTR) | |
1874 | zfs_xvattr_set(zp, xvap); | |
1875 | ||
1876 | mutex_exit(&zp->z_lock); | |
1877 | mutex_exit(&zp->z_acl_lock); | |
1878 | ASSERT3U(error, ==, 0); | |
1879 | ||
1880 | if (aclp != setaclp) | |
1881 | zfs_acl_free(aclp); | |
1882 | } | |
1883 | ||
1884 | /* | |
1885 | * Retrieve a files ACL | |
1886 | */ | |
1887 | int | |
1888 | zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr) | |
1889 | { | |
1890 | zfs_acl_t *aclp; | |
1891 | ulong_t mask; | |
1892 | int error; | |
1893 | int count = 0; | |
1894 | int largeace = 0; | |
1895 | ||
1896 | mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT | | |
1897 | VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES); | |
1898 | ||
1899 | if (error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr)) | |
1900 | return (error); | |
1901 | ||
1902 | if (mask == 0) | |
1903 | return (ENOSYS); | |
1904 | ||
1905 | mutex_enter(&zp->z_acl_lock); | |
1906 | ||
1907 | error = zfs_acl_node_read(zp, &aclp, B_FALSE); | |
1908 | if (error != 0) { | |
1909 | mutex_exit(&zp->z_acl_lock); | |
1910 | return (error); | |
1911 | } | |
1912 | ||
1913 | /* | |
1914 | * Scan ACL to determine number of ACEs | |
1915 | */ | |
1916 | if ((zp->z_phys->zp_flags & ZFS_ACL_OBJ_ACE) && | |
1917 | !(mask & VSA_ACE_ALLTYPES)) { | |
1918 | void *zacep = NULL; | |
1919 | uint64_t who; | |
1920 | uint32_t access_mask; | |
1921 | uint16_t type, iflags; | |
1922 | ||
1923 | while (zacep = zfs_acl_next_ace(aclp, zacep, | |
1924 | &who, &access_mask, &iflags, &type)) { | |
1925 | switch (type) { | |
1926 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
1927 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
1928 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
1929 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
1930 | largeace++; | |
1931 | continue; | |
1932 | default: | |
1933 | count++; | |
1934 | } | |
1935 | } | |
1936 | vsecp->vsa_aclcnt = count; | |
1937 | } else | |
1938 | count = aclp->z_acl_count; | |
1939 | ||
1940 | if (mask & VSA_ACECNT) { | |
1941 | vsecp->vsa_aclcnt = count; | |
1942 | } | |
1943 | ||
1944 | if (mask & VSA_ACE) { | |
1945 | size_t aclsz; | |
1946 | ||
1947 | zfs_acl_node_t *aclnode = list_head(&aclp->z_acl); | |
1948 | ||
1949 | aclsz = count * sizeof (ace_t) + | |
1950 | sizeof (ace_object_t) * largeace; | |
1951 | ||
1952 | vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP); | |
1953 | vsecp->vsa_aclentsz = aclsz; | |
1954 | ||
1955 | if (aclp->z_version == ZFS_ACL_VERSION_FUID) | |
1956 | zfs_copy_fuid_2_ace(zp->z_zfsvfs, aclp, cr, | |
1957 | vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES)); | |
1958 | else { | |
1959 | bcopy(aclnode->z_acldata, vsecp->vsa_aclentp, | |
1960 | count * sizeof (ace_t)); | |
1961 | } | |
1962 | } | |
1963 | if (mask & VSA_ACE_ACLFLAGS) { | |
1964 | vsecp->vsa_aclflags = 0; | |
1965 | if (zp->z_phys->zp_flags & ZFS_ACL_DEFAULTED) | |
1966 | vsecp->vsa_aclflags |= ACL_DEFAULTED; | |
1967 | if (zp->z_phys->zp_flags & ZFS_ACL_PROTECTED) | |
1968 | vsecp->vsa_aclflags |= ACL_PROTECTED; | |
1969 | if (zp->z_phys->zp_flags & ZFS_ACL_AUTO_INHERIT) | |
1970 | vsecp->vsa_aclflags |= ACL_AUTO_INHERIT; | |
1971 | } | |
1972 | ||
1973 | mutex_exit(&zp->z_acl_lock); | |
1974 | ||
1975 | zfs_acl_free(aclp); | |
1976 | ||
1977 | return (0); | |
1978 | } | |
1979 | ||
1980 | int | |
1981 | zfs_vsec_2_aclp(zfsvfs_t *zfsvfs, vtype_t obj_type, | |
1982 | vsecattr_t *vsecp, zfs_acl_t **zaclp) | |
1983 | { | |
1984 | zfs_acl_t *aclp; | |
1985 | zfs_acl_node_t *aclnode; | |
1986 | int aclcnt = vsecp->vsa_aclcnt; | |
1987 | int error; | |
1988 | ||
1989 | if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0) | |
1990 | return (EINVAL); | |
1991 | ||
1992 | aclp = zfs_acl_alloc(zfs_acl_version(zfsvfs->z_version)); | |
1993 | ||
1994 | aclp->z_hints = 0; | |
1995 | aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t)); | |
1996 | if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) { | |
1997 | if ((error = zfs_copy_ace_2_oldace(obj_type, aclp, | |
1998 | (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata, | |
1999 | aclcnt, &aclnode->z_size)) != 0) { | |
2000 | zfs_acl_free(aclp); | |
2001 | zfs_acl_node_free(aclnode); | |
2002 | return (error); | |
2003 | } | |
2004 | } else { | |
2005 | if ((error = zfs_copy_ace_2_fuid(obj_type, aclp, | |
2006 | vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt, | |
2007 | &aclnode->z_size)) != 0) { | |
2008 | zfs_acl_free(aclp); | |
2009 | zfs_acl_node_free(aclnode); | |
2010 | return (error); | |
2011 | } | |
2012 | } | |
2013 | aclp->z_acl_bytes = aclnode->z_size; | |
2014 | aclnode->z_ace_count = aclcnt; | |
2015 | aclp->z_acl_count = aclcnt; | |
2016 | list_insert_head(&aclp->z_acl, aclnode); | |
2017 | ||
2018 | /* | |
2019 | * If flags are being set then add them to z_hints | |
2020 | */ | |
2021 | if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) { | |
2022 | if (vsecp->vsa_aclflags & ACL_PROTECTED) | |
2023 | aclp->z_hints |= ZFS_ACL_PROTECTED; | |
2024 | if (vsecp->vsa_aclflags & ACL_DEFAULTED) | |
2025 | aclp->z_hints |= ZFS_ACL_DEFAULTED; | |
2026 | if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT) | |
2027 | aclp->z_hints |= ZFS_ACL_AUTO_INHERIT; | |
2028 | } | |
2029 | ||
2030 | *zaclp = aclp; | |
2031 | ||
2032 | return (0); | |
2033 | } | |
2034 | ||
2035 | /* | |
2036 | * Set a files ACL | |
2037 | */ | |
2038 | int | |
2039 | zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr) | |
2040 | { | |
2041 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
2042 | zilog_t *zilog = zfsvfs->z_log; | |
2043 | ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT); | |
2044 | dmu_tx_t *tx; | |
2045 | int error; | |
2046 | zfs_acl_t *aclp; | |
2047 | zfs_fuid_info_t *fuidp = NULL; | |
2048 | ||
2049 | if (mask == 0) | |
2050 | return (ENOSYS); | |
2051 | ||
2052 | if (zp->z_phys->zp_flags & ZFS_IMMUTABLE) | |
2053 | return (EPERM); | |
2054 | ||
2055 | if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr)) | |
2056 | return (error); | |
2057 | ||
2058 | error = zfs_vsec_2_aclp(zfsvfs, ZTOV(zp)->v_type, vsecp, &aclp); | |
2059 | if (error) | |
2060 | return (error); | |
2061 | ||
2062 | /* | |
2063 | * If ACL wide flags aren't being set then preserve any | |
2064 | * existing flags. | |
2065 | */ | |
2066 | if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) { | |
2067 | aclp->z_hints |= (zp->z_phys->zp_flags & V4_ACL_WIDE_FLAGS); | |
2068 | } | |
2069 | top: | |
2070 | if (error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr)) { | |
2071 | zfs_acl_free(aclp); | |
2072 | return (error); | |
2073 | } | |
2074 | ||
2075 | mutex_enter(&zp->z_lock); | |
2076 | mutex_enter(&zp->z_acl_lock); | |
2077 | ||
2078 | tx = dmu_tx_create(zfsvfs->z_os); | |
2079 | dmu_tx_hold_bonus(tx, zp->z_id); | |
2080 | ||
2081 | if (zp->z_phys->zp_acl.z_acl_extern_obj) { | |
2082 | /* Are we upgrading ACL? */ | |
2083 | if (zfsvfs->z_version <= ZPL_VERSION_FUID && | |
2084 | zp->z_phys->zp_acl.z_acl_version == | |
2085 | ZFS_ACL_VERSION_INITIAL) { | |
2086 | dmu_tx_hold_free(tx, | |
2087 | zp->z_phys->zp_acl.z_acl_extern_obj, | |
2088 | 0, DMU_OBJECT_END); | |
2089 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, | |
2090 | 0, aclp->z_acl_bytes); | |
2091 | } else { | |
2092 | dmu_tx_hold_write(tx, | |
2093 | zp->z_phys->zp_acl.z_acl_extern_obj, | |
2094 | 0, aclp->z_acl_bytes); | |
2095 | } | |
2096 | } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) { | |
2097 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes); | |
2098 | } | |
2099 | if (aclp->z_has_fuids) { | |
2100 | if (zfsvfs->z_fuid_obj == 0) { | |
2101 | dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); | |
2102 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, | |
2103 | FUID_SIZE_ESTIMATE(zfsvfs)); | |
2104 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); | |
2105 | } else { | |
2106 | dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); | |
2107 | dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, | |
2108 | FUID_SIZE_ESTIMATE(zfsvfs)); | |
2109 | } | |
2110 | } | |
2111 | ||
2112 | error = dmu_tx_assign(tx, zfsvfs->z_assign); | |
2113 | if (error) { | |
2114 | mutex_exit(&zp->z_acl_lock); | |
2115 | mutex_exit(&zp->z_lock); | |
2116 | ||
2117 | if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { | |
2118 | dmu_tx_wait(tx); | |
2119 | dmu_tx_abort(tx); | |
2120 | goto top; | |
2121 | } | |
2122 | dmu_tx_abort(tx); | |
2123 | zfs_acl_free(aclp); | |
2124 | return (error); | |
2125 | } | |
2126 | ||
2127 | error = zfs_aclset_common(zp, aclp, cr, &fuidp, tx); | |
2128 | ASSERT(error == 0); | |
2129 | ||
2130 | zfs_log_acl(zilog, tx, zp, vsecp, fuidp); | |
2131 | ||
2132 | if (fuidp) | |
2133 | zfs_fuid_info_free(fuidp); | |
2134 | zfs_acl_free(aclp); | |
2135 | dmu_tx_commit(tx); | |
2136 | done: | |
2137 | mutex_exit(&zp->z_acl_lock); | |
2138 | mutex_exit(&zp->z_lock); | |
2139 | ||
2140 | return (error); | |
2141 | } | |
2142 | ||
2143 | /* | |
2144 | * working_mode returns the permissions that were not granted | |
2145 | */ | |
2146 | static int | |
2147 | zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode, | |
2148 | boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr) | |
2149 | { | |
2150 | zfs_acl_t *aclp; | |
2151 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
2152 | int error; | |
2153 | uid_t uid = crgetuid(cr); | |
2154 | uint64_t who; | |
2155 | uint16_t type, iflags; | |
2156 | uint16_t entry_type; | |
2157 | uint32_t access_mask; | |
2158 | uint32_t deny_mask = 0; | |
2159 | zfs_ace_hdr_t *acep = NULL; | |
2160 | boolean_t checkit; | |
2161 | uid_t fowner; | |
2162 | uid_t gowner; | |
2163 | ||
2164 | /* | |
2165 | * Short circuit empty requests | |
2166 | */ | |
2167 | if (v4_mode == 0) | |
2168 | return (0); | |
2169 | ||
2170 | *check_privs = B_TRUE; | |
2171 | ||
2172 | if (zfsvfs->z_assign >= TXG_INITIAL) { /* ZIL replay */ | |
2173 | *working_mode = 0; | |
2174 | return (0); | |
2175 | } | |
2176 | ||
2177 | *working_mode = v4_mode; | |
2178 | ||
2179 | if ((v4_mode & WRITE_MASK) && | |
2180 | (zp->z_zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) && | |
2181 | (!IS_DEVVP(ZTOV(zp)))) { | |
2182 | *check_privs = B_FALSE; | |
2183 | return (EROFS); | |
2184 | } | |
2185 | ||
2186 | /* | |
2187 | * Only check for READONLY on non-directories. | |
2188 | */ | |
2189 | if ((v4_mode & WRITE_MASK_DATA) && | |
2190 | (((ZTOV(zp)->v_type != VDIR) && | |
2191 | (zp->z_phys->zp_flags & (ZFS_READONLY | ZFS_IMMUTABLE))) || | |
2192 | (ZTOV(zp)->v_type == VDIR && | |
2193 | (zp->z_phys->zp_flags & ZFS_IMMUTABLE)))) { | |
2194 | *check_privs = B_FALSE; | |
2195 | return (EPERM); | |
2196 | } | |
2197 | ||
2198 | if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) && | |
2199 | (zp->z_phys->zp_flags & ZFS_NOUNLINK)) { | |
2200 | *check_privs = B_FALSE; | |
2201 | return (EPERM); | |
2202 | } | |
2203 | ||
2204 | if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) && | |
2205 | (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED))) { | |
2206 | *check_privs = B_FALSE; | |
2207 | return (EACCES); | |
2208 | } | |
2209 | ||
2210 | /* | |
2211 | * The caller requested that the ACL check be skipped. This | |
2212 | * would only happen if the caller checked VOP_ACCESS() with a | |
2213 | * 32 bit ACE mask and already had the appropriate permissions. | |
2214 | */ | |
2215 | if (skipaclchk) { | |
2216 | *working_mode = 0; | |
2217 | return (0); | |
2218 | } | |
2219 | ||
2220 | zfs_fuid_map_ids(zp, cr, &fowner, &gowner); | |
2221 | ||
2222 | mutex_enter(&zp->z_acl_lock); | |
2223 | ||
2224 | error = zfs_acl_node_read(zp, &aclp, B_FALSE); | |
2225 | if (error != 0) { | |
2226 | mutex_exit(&zp->z_acl_lock); | |
2227 | return (error); | |
2228 | } | |
2229 | ||
2230 | while (acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask, | |
2231 | &iflags, &type)) { | |
2232 | ||
2233 | if (iflags & ACE_INHERIT_ONLY_ACE) | |
2234 | continue; | |
2235 | ||
2236 | entry_type = (iflags & ACE_TYPE_FLAGS); | |
2237 | ||
2238 | checkit = B_FALSE; | |
2239 | ||
2240 | switch (entry_type) { | |
2241 | case ACE_OWNER: | |
2242 | if (uid == fowner) | |
2243 | checkit = B_TRUE; | |
2244 | break; | |
2245 | case OWNING_GROUP: | |
2246 | who = gowner; | |
2247 | /*FALLTHROUGH*/ | |
2248 | case ACE_IDENTIFIER_GROUP: | |
2249 | checkit = zfs_groupmember(zfsvfs, who, cr); | |
2250 | break; | |
2251 | case ACE_EVERYONE: | |
2252 | checkit = B_TRUE; | |
2253 | break; | |
2254 | ||
2255 | /* USER Entry */ | |
2256 | default: | |
2257 | if (entry_type == 0) { | |
2258 | uid_t newid; | |
2259 | ||
2260 | newid = zfs_fuid_map_id(zfsvfs, who, cr, | |
2261 | ZFS_ACE_USER); | |
2262 | if (newid != IDMAP_WK_CREATOR_OWNER_UID && | |
2263 | uid == newid) | |
2264 | checkit = B_TRUE; | |
2265 | break; | |
2266 | } else { | |
2267 | zfs_acl_free(aclp); | |
2268 | mutex_exit(&zp->z_acl_lock); | |
2269 | return (EIO); | |
2270 | } | |
2271 | } | |
2272 | ||
2273 | if (checkit) { | |
2274 | uint32_t mask_matched = (access_mask & *working_mode); | |
2275 | ||
2276 | if (mask_matched) { | |
2277 | if (type == DENY) | |
2278 | deny_mask |= mask_matched; | |
2279 | ||
2280 | *working_mode &= ~mask_matched; | |
2281 | } | |
2282 | } | |
2283 | ||
2284 | /* Are we done? */ | |
2285 | if (*working_mode == 0) | |
2286 | break; | |
2287 | } | |
2288 | ||
2289 | mutex_exit(&zp->z_acl_lock); | |
2290 | zfs_acl_free(aclp); | |
2291 | ||
2292 | /* Put the found 'denies' back on the working mode */ | |
2293 | *working_mode |= deny_mask; | |
2294 | ||
2295 | if (*working_mode) | |
2296 | return (EACCES); | |
2297 | ||
2298 | return (0); | |
2299 | } | |
2300 | ||
2301 | static int | |
2302 | zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs, | |
2303 | cred_t *cr) | |
2304 | { | |
2305 | if (*working_mode != ACE_WRITE_DATA) | |
2306 | return (EACCES); | |
2307 | ||
2308 | return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode, | |
2309 | check_privs, B_FALSE, cr)); | |
2310 | } | |
2311 | ||
2312 | /* | |
2313 | * Determine whether Access should be granted/denied, invoking least | |
2314 | * priv subsytem when a deny is determined. | |
2315 | */ | |
2316 | int | |
2317 | zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr) | |
2318 | { | |
2319 | uint32_t working_mode; | |
2320 | int error; | |
2321 | int is_attr; | |
2322 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
2323 | boolean_t check_privs; | |
2324 | znode_t *xzp; | |
2325 | znode_t *check_zp = zp; | |
2326 | ||
2327 | is_attr = ((zp->z_phys->zp_flags & ZFS_XATTR) && | |
2328 | (ZTOV(zp)->v_type == VDIR)); | |
2329 | ||
2330 | /* | |
2331 | * If attribute then validate against base file | |
2332 | */ | |
2333 | if (is_attr) { | |
2334 | if ((error = zfs_zget(zp->z_zfsvfs, | |
2335 | zp->z_phys->zp_parent, &xzp)) != 0) { | |
2336 | return (error); | |
2337 | } | |
2338 | ||
2339 | check_zp = xzp; | |
2340 | ||
2341 | /* | |
2342 | * fixup mode to map to xattr perms | |
2343 | */ | |
2344 | ||
2345 | if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) { | |
2346 | mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA); | |
2347 | mode |= ACE_WRITE_NAMED_ATTRS; | |
2348 | } | |
2349 | ||
2350 | if (mode & (ACE_READ_DATA|ACE_EXECUTE)) { | |
2351 | mode &= ~(ACE_READ_DATA|ACE_EXECUTE); | |
2352 | mode |= ACE_READ_NAMED_ATTRS; | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | if ((error = zfs_zaccess_common(check_zp, mode, &working_mode, | |
2357 | &check_privs, skipaclchk, cr)) == 0) { | |
2358 | if (is_attr) | |
2359 | VN_RELE(ZTOV(xzp)); | |
2360 | return (0); | |
2361 | } | |
2362 | ||
2363 | if (error && !check_privs) { | |
2364 | if (is_attr) | |
2365 | VN_RELE(ZTOV(xzp)); | |
2366 | return (error); | |
2367 | } | |
2368 | ||
2369 | if (error && (flags & V_APPEND)) { | |
2370 | error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr); | |
2371 | } | |
2372 | ||
2373 | if (error && check_privs) { | |
2374 | uid_t owner; | |
2375 | mode_t checkmode = 0; | |
2376 | ||
2377 | owner = zfs_fuid_map_id(zfsvfs, check_zp->z_phys->zp_uid, cr, | |
2378 | ZFS_OWNER); | |
2379 | ||
2380 | /* | |
2381 | * First check for implicit owner permission on | |
2382 | * read_acl/read_attributes | |
2383 | */ | |
2384 | ||
2385 | error = 0; | |
2386 | ASSERT(working_mode != 0); | |
2387 | ||
2388 | if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) && | |
2389 | owner == crgetuid(cr))) | |
2390 | working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES); | |
2391 | ||
2392 | if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS| | |
2393 | ACE_READ_ACL|ACE_READ_ATTRIBUTES)) | |
2394 | checkmode |= VREAD; | |
2395 | if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS| | |
2396 | ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES)) | |
2397 | checkmode |= VWRITE; | |
2398 | if (working_mode & ACE_EXECUTE) | |
2399 | checkmode |= VEXEC; | |
2400 | ||
2401 | if (checkmode) | |
2402 | error = secpolicy_vnode_access(cr, ZTOV(check_zp), | |
2403 | owner, checkmode); | |
2404 | ||
2405 | if (error == 0 && (working_mode & ACE_WRITE_OWNER)) | |
2406 | error = secpolicy_vnode_create_gid(cr); | |
2407 | if (error == 0 && (working_mode & ACE_WRITE_ACL)) | |
2408 | error = secpolicy_vnode_setdac(cr, owner); | |
2409 | ||
2410 | if (error == 0 && (working_mode & | |
2411 | (ACE_DELETE|ACE_DELETE_CHILD))) | |
2412 | error = secpolicy_vnode_remove(cr); | |
2413 | ||
2414 | if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) | |
2415 | error = secpolicy_vnode_owner(cr, owner); | |
2416 | ||
2417 | if (error == 0) { | |
2418 | /* | |
2419 | * See if any bits other than those already checked | |
2420 | * for are still present. If so then return EACCES | |
2421 | */ | |
2422 | if (working_mode & ~(ZFS_CHECKED_MASKS)) { | |
2423 | error = EACCES; | |
2424 | } | |
2425 | } | |
2426 | } | |
2427 | ||
2428 | if (is_attr) | |
2429 | VN_RELE(ZTOV(xzp)); | |
2430 | ||
2431 | return (error); | |
2432 | } | |
2433 | ||
2434 | /* | |
2435 | * Translate traditional unix VREAD/VWRITE/VEXEC mode into | |
2436 | * native ACL format and call zfs_zaccess() | |
2437 | */ | |
2438 | int | |
2439 | zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr) | |
2440 | { | |
2441 | return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr)); | |
2442 | } | |
2443 | ||
2444 | /* | |
2445 | * Access function for secpolicy_vnode_setattr | |
2446 | */ | |
2447 | int | |
2448 | zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr) | |
2449 | { | |
2450 | int v4_mode = zfs_unix_to_v4(mode >> 6); | |
2451 | ||
2452 | return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr)); | |
2453 | } | |
2454 | ||
2455 | static int | |
2456 | zfs_delete_final_check(znode_t *zp, znode_t *dzp, | |
2457 | mode_t missing_perms, cred_t *cr) | |
2458 | { | |
2459 | int error; | |
2460 | uid_t downer; | |
2461 | zfsvfs_t *zfsvfs = zp->z_zfsvfs; | |
2462 | ||
2463 | downer = zfs_fuid_map_id(zfsvfs, dzp->z_phys->zp_uid, cr, ZFS_OWNER); | |
2464 | ||
2465 | error = secpolicy_vnode_access(cr, ZTOV(dzp), downer, missing_perms); | |
2466 | ||
2467 | if (error == 0) | |
2468 | error = zfs_sticky_remove_access(dzp, zp, cr); | |
2469 | ||
2470 | return (error); | |
2471 | } | |
2472 | ||
2473 | /* | |
2474 | * Determine whether Access should be granted/deny, without | |
2475 | * consulting least priv subsystem. | |
2476 | * | |
2477 | * | |
2478 | * The following chart is the recommended NFSv4 enforcement for | |
2479 | * ability to delete an object. | |
2480 | * | |
2481 | * ------------------------------------------------------- | |
2482 | * | Parent Dir | Target Object Permissions | | |
2483 | * | permissions | | | |
2484 | * ------------------------------------------------------- | |
2485 | * | | ACL Allows | ACL Denies| Delete | | |
2486 | * | | Delete | Delete | unspecified| | |
2487 | * ------------------------------------------------------- | |
2488 | * | ACL Allows | Permit | Permit | Permit | | |
2489 | * | DELETE_CHILD | | | |
2490 | * ------------------------------------------------------- | |
2491 | * | ACL Denies | Permit | Deny | Deny | | |
2492 | * | DELETE_CHILD | | | | | |
2493 | * ------------------------------------------------------- | |
2494 | * | ACL specifies | | | | | |
2495 | * | only allow | Permit | Permit | Permit | | |
2496 | * | write and | | | | | |
2497 | * | execute | | | | | |
2498 | * ------------------------------------------------------- | |
2499 | * | ACL denies | | | | | |
2500 | * | write and | Permit | Deny | Deny | | |
2501 | * | execute | | | | | |
2502 | * ------------------------------------------------------- | |
2503 | * ^ | |
2504 | * | | |
2505 | * No search privilege, can't even look up file? | |
2506 | * | |
2507 | */ | |
2508 | int | |
2509 | zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr) | |
2510 | { | |
2511 | uint32_t dzp_working_mode = 0; | |
2512 | uint32_t zp_working_mode = 0; | |
2513 | int dzp_error, zp_error; | |
2514 | mode_t missing_perms; | |
2515 | boolean_t dzpcheck_privs = B_TRUE; | |
2516 | boolean_t zpcheck_privs = B_TRUE; | |
2517 | ||
2518 | /* | |
2519 | * We want specific DELETE permissions to | |
2520 | * take precedence over WRITE/EXECUTE. We don't | |
2521 | * want an ACL such as this to mess us up. | |
2522 | * user:joe:write_data:deny,user:joe:delete:allow | |
2523 | * | |
2524 | * However, deny permissions may ultimately be overridden | |
2525 | * by secpolicy_vnode_access(). | |
2526 | * | |
2527 | * We will ask for all of the necessary permissions and then | |
2528 | * look at the working modes from the directory and target object | |
2529 | * to determine what was found. | |
2530 | */ | |
2531 | ||
2532 | if (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_NOUNLINK)) | |
2533 | return (EPERM); | |
2534 | ||
2535 | /* | |
2536 | * If the directory permissions allow the delete, we are done. | |
2537 | */ | |
2538 | if ((dzp_error = zfs_zaccess_common(dzp, | |
2539 | ACE_DELETE_CHILD|ACE_EXECUTE|ACE_WRITE_DATA, | |
2540 | &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0) | |
2541 | return (0); | |
2542 | ||
2543 | /* | |
2544 | * If target object has delete permission then we are done | |
2545 | */ | |
2546 | if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode, | |
2547 | &zpcheck_privs, B_FALSE, cr)) == 0) | |
2548 | return (0); | |
2549 | ||
2550 | if (!dzpcheck_privs) | |
2551 | return (dzp_error); | |
2552 | else if (!zpcheck_privs) | |
2553 | return (zp_error); | |
2554 | ||
2555 | /* | |
2556 | * First check the first row. | |
2557 | * We only need to see if parent Allows delete_child | |
2558 | */ | |
2559 | if ((dzp_working_mode & ACE_DELETE_CHILD) == 0) | |
2560 | return (0); | |
2561 | ||
2562 | /* | |
2563 | * Second row | |
2564 | * we already have the necessary information in | |
2565 | * zp_working_mode, zp_error and dzp_error. | |
2566 | */ | |
2567 | ||
2568 | if ((zp_working_mode & ACE_DELETE) == 0) | |
2569 | return (0); | |
2570 | ||
2571 | /* | |
2572 | * determine the needed permissions based off of the directories | |
2573 | * working mode | |
2574 | */ | |
2575 | ||
2576 | missing_perms = (dzp_working_mode & ACE_WRITE_DATA) ? VWRITE : 0; | |
2577 | missing_perms |= (dzp_working_mode & ACE_EXECUTE) ? VEXEC : 0; | |
2578 | ||
2579 | if (dzp_error == EACCES) | |
2580 | return (zfs_delete_final_check(zp, dzp, missing_perms, cr)); | |
2581 | ||
2582 | /* | |
2583 | * Third Row | |
2584 | * only need to see if we have write/execute on directory. | |
2585 | */ | |
2586 | ||
2587 | if (missing_perms == 0) | |
2588 | return (zfs_sticky_remove_access(dzp, zp, cr)); | |
2589 | ||
2590 | /* | |
2591 | * Fourth Row | |
2592 | */ | |
2593 | ||
2594 | if (missing_perms && ((zp_working_mode & ACE_DELETE) == 0)) | |
2595 | return (zfs_sticky_remove_access(dzp, zp, cr)); | |
2596 | ||
2597 | return (zfs_delete_final_check(zp, dzp, missing_perms, cr)); | |
2598 | } | |
2599 | ||
2600 | int | |
2601 | zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp, | |
2602 | znode_t *tzp, cred_t *cr) | |
2603 | { | |
2604 | int add_perm; | |
2605 | int error; | |
2606 | ||
2607 | if (szp->z_phys->zp_flags & ZFS_AV_QUARANTINED) | |
2608 | return (EACCES); | |
2609 | ||
2610 | add_perm = (ZTOV(szp)->v_type == VDIR) ? | |
2611 | ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE; | |
2612 | ||
2613 | /* | |
2614 | * Rename permissions are combination of delete permission + | |
2615 | * add file/subdir permission. | |
2616 | */ | |
2617 | ||
2618 | /* | |
2619 | * first make sure we do the delete portion. | |
2620 | * | |
2621 | * If that succeeds then check for add_file/add_subdir permissions | |
2622 | */ | |
2623 | ||
2624 | if (error = zfs_zaccess_delete(sdzp, szp, cr)) | |
2625 | return (error); | |
2626 | ||
2627 | /* | |
2628 | * If we have a tzp, see if we can delete it? | |
2629 | */ | |
2630 | if (tzp) { | |
2631 | if (error = zfs_zaccess_delete(tdzp, tzp, cr)) | |
2632 | return (error); | |
2633 | } | |
2634 | ||
2635 | /* | |
2636 | * Now check for add permissions | |
2637 | */ | |
2638 | error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr); | |
2639 | ||
2640 | return (error); | |
2641 | } |