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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
34dc7c2f BB |
23 | */ |
24 | ||
60101509 | 25 | |
34dc7c2f BB |
26 | #include <sys/types.h> |
27 | #include <sys/param.h> | |
28 | #include <sys/time.h> | |
29 | #include <sys/systm.h> | |
30 | #include <sys/sysmacros.h> | |
31 | #include <sys/resource.h> | |
32 | #include <sys/vfs.h> | |
33 | #include <sys/vnode.h> | |
34 | #include <sys/sid.h> | |
35 | #include <sys/file.h> | |
36 | #include <sys/stat.h> | |
37 | #include <sys/kmem.h> | |
38 | #include <sys/cmn_err.h> | |
39 | #include <sys/errno.h> | |
40 | #include <sys/unistd.h> | |
41 | #include <sys/sdt.h> | |
42 | #include <sys/fs/zfs.h> | |
43 | #include <sys/mode.h> | |
44 | #include <sys/policy.h> | |
45 | #include <sys/zfs_znode.h> | |
46 | #include <sys/zfs_fuid.h> | |
47 | #include <sys/zfs_acl.h> | |
48 | #include <sys/zfs_dir.h> | |
49 | #include <sys/zfs_vfsops.h> | |
50 | #include <sys/dmu.h> | |
51 | #include <sys/dnode.h> | |
52 | #include <sys/zap.h> | |
428870ff | 53 | #include <sys/sa.h> |
34dc7c2f | 54 | #include "fs/fs_subr.h" |
34dc7c2f BB |
55 | |
56 | #define ALLOW ACE_ACCESS_ALLOWED_ACE_TYPE | |
57 | #define DENY ACE_ACCESS_DENIED_ACE_TYPE | |
58 | #define MAX_ACE_TYPE ACE_SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE | |
b128c09f | 59 | #define MIN_ACE_TYPE ALLOW |
34dc7c2f BB |
60 | |
61 | #define OWNING_GROUP (ACE_GROUP|ACE_IDENTIFIER_GROUP) | |
62 | #define EVERYONE_ALLOW_MASK (ACE_READ_ACL|ACE_READ_ATTRIBUTES | \ | |
63 | ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE) | |
64 | #define EVERYONE_DENY_MASK (ACE_WRITE_ACL|ACE_WRITE_OWNER | \ | |
65 | ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS) | |
66 | #define OWNER_ALLOW_MASK (ACE_WRITE_ACL | ACE_WRITE_OWNER | \ | |
67 | ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS) | |
34dc7c2f BB |
68 | |
69 | #define ZFS_CHECKED_MASKS (ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_READ_DATA| \ | |
70 | ACE_READ_NAMED_ATTRS|ACE_WRITE_DATA|ACE_WRITE_ATTRIBUTES| \ | |
71 | ACE_WRITE_NAMED_ATTRS|ACE_APPEND_DATA|ACE_EXECUTE|ACE_WRITE_OWNER| \ | |
72 | ACE_WRITE_ACL|ACE_DELETE|ACE_DELETE_CHILD|ACE_SYNCHRONIZE) | |
73 | ||
9babb374 BB |
74 | #define WRITE_MASK_DATA (ACE_WRITE_DATA|ACE_APPEND_DATA|ACE_WRITE_NAMED_ATTRS) |
75 | #define WRITE_MASK_ATTRS (ACE_WRITE_ACL|ACE_WRITE_OWNER|ACE_WRITE_ATTRIBUTES| \ | |
76 | ACE_DELETE|ACE_DELETE_CHILD) | |
77 | #define WRITE_MASK (WRITE_MASK_DATA|WRITE_MASK_ATTRS) | |
34dc7c2f BB |
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 | ||
45d1cae3 BB |
96 | #define ALL_MODE_EXECS (S_IXUSR | S_IXGRP | S_IXOTH) |
97 | ||
34dc7c2f BB |
98 | static uint16_t |
99 | zfs_ace_v0_get_type(void *acep) | |
100 | { | |
101 | return (((zfs_oldace_t *)acep)->z_type); | |
102 | } | |
103 | ||
104 | static uint16_t | |
105 | zfs_ace_v0_get_flags(void *acep) | |
106 | { | |
107 | return (((zfs_oldace_t *)acep)->z_flags); | |
108 | } | |
109 | ||
110 | static uint32_t | |
111 | zfs_ace_v0_get_mask(void *acep) | |
112 | { | |
113 | return (((zfs_oldace_t *)acep)->z_access_mask); | |
114 | } | |
115 | ||
116 | static uint64_t | |
117 | zfs_ace_v0_get_who(void *acep) | |
118 | { | |
119 | return (((zfs_oldace_t *)acep)->z_fuid); | |
120 | } | |
121 | ||
122 | static void | |
123 | zfs_ace_v0_set_type(void *acep, uint16_t type) | |
124 | { | |
125 | ((zfs_oldace_t *)acep)->z_type = type; | |
126 | } | |
127 | ||
128 | static void | |
129 | zfs_ace_v0_set_flags(void *acep, uint16_t flags) | |
130 | { | |
131 | ((zfs_oldace_t *)acep)->z_flags = flags; | |
132 | } | |
133 | ||
134 | static void | |
135 | zfs_ace_v0_set_mask(void *acep, uint32_t mask) | |
136 | { | |
137 | ((zfs_oldace_t *)acep)->z_access_mask = mask; | |
138 | } | |
139 | ||
140 | static void | |
141 | zfs_ace_v0_set_who(void *acep, uint64_t who) | |
142 | { | |
143 | ((zfs_oldace_t *)acep)->z_fuid = who; | |
144 | } | |
145 | ||
146 | /*ARGSUSED*/ | |
147 | static size_t | |
148 | zfs_ace_v0_size(void *acep) | |
149 | { | |
150 | return (sizeof (zfs_oldace_t)); | |
151 | } | |
152 | ||
153 | static size_t | |
154 | zfs_ace_v0_abstract_size(void) | |
155 | { | |
156 | return (sizeof (zfs_oldace_t)); | |
157 | } | |
158 | ||
159 | static int | |
160 | zfs_ace_v0_mask_off(void) | |
161 | { | |
162 | return (offsetof(zfs_oldace_t, z_access_mask)); | |
163 | } | |
164 | ||
165 | /*ARGSUSED*/ | |
166 | static int | |
167 | zfs_ace_v0_data(void *acep, void **datap) | |
168 | { | |
169 | *datap = NULL; | |
170 | return (0); | |
171 | } | |
172 | ||
173 | static acl_ops_t zfs_acl_v0_ops = { | |
174 | zfs_ace_v0_get_mask, | |
175 | zfs_ace_v0_set_mask, | |
176 | zfs_ace_v0_get_flags, | |
177 | zfs_ace_v0_set_flags, | |
178 | zfs_ace_v0_get_type, | |
179 | zfs_ace_v0_set_type, | |
180 | zfs_ace_v0_get_who, | |
181 | zfs_ace_v0_set_who, | |
182 | zfs_ace_v0_size, | |
183 | zfs_ace_v0_abstract_size, | |
184 | zfs_ace_v0_mask_off, | |
185 | zfs_ace_v0_data | |
186 | }; | |
187 | ||
188 | static uint16_t | |
189 | zfs_ace_fuid_get_type(void *acep) | |
190 | { | |
191 | return (((zfs_ace_hdr_t *)acep)->z_type); | |
192 | } | |
193 | ||
194 | static uint16_t | |
195 | zfs_ace_fuid_get_flags(void *acep) | |
196 | { | |
197 | return (((zfs_ace_hdr_t *)acep)->z_flags); | |
198 | } | |
199 | ||
200 | static uint32_t | |
201 | zfs_ace_fuid_get_mask(void *acep) | |
202 | { | |
203 | return (((zfs_ace_hdr_t *)acep)->z_access_mask); | |
204 | } | |
205 | ||
206 | static uint64_t | |
207 | zfs_ace_fuid_get_who(void *args) | |
208 | { | |
209 | uint16_t entry_type; | |
210 | zfs_ace_t *acep = args; | |
211 | ||
212 | entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS; | |
213 | ||
214 | if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP || | |
215 | entry_type == ACE_EVERYONE) | |
216 | return (-1); | |
217 | return (((zfs_ace_t *)acep)->z_fuid); | |
218 | } | |
219 | ||
220 | static void | |
221 | zfs_ace_fuid_set_type(void *acep, uint16_t type) | |
222 | { | |
223 | ((zfs_ace_hdr_t *)acep)->z_type = type; | |
224 | } | |
225 | ||
226 | static void | |
227 | zfs_ace_fuid_set_flags(void *acep, uint16_t flags) | |
228 | { | |
229 | ((zfs_ace_hdr_t *)acep)->z_flags = flags; | |
230 | } | |
231 | ||
232 | static void | |
233 | zfs_ace_fuid_set_mask(void *acep, uint32_t mask) | |
234 | { | |
235 | ((zfs_ace_hdr_t *)acep)->z_access_mask = mask; | |
236 | } | |
237 | ||
238 | static void | |
239 | zfs_ace_fuid_set_who(void *arg, uint64_t who) | |
240 | { | |
241 | zfs_ace_t *acep = arg; | |
242 | ||
243 | uint16_t entry_type = acep->z_hdr.z_flags & ACE_TYPE_FLAGS; | |
244 | ||
245 | if (entry_type == ACE_OWNER || entry_type == OWNING_GROUP || | |
246 | entry_type == ACE_EVERYONE) | |
247 | return; | |
248 | acep->z_fuid = who; | |
249 | } | |
250 | ||
251 | static size_t | |
252 | zfs_ace_fuid_size(void *acep) | |
253 | { | |
254 | zfs_ace_hdr_t *zacep = acep; | |
255 | uint16_t entry_type; | |
256 | ||
257 | switch (zacep->z_type) { | |
258 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
259 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
260 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
261 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
262 | return (sizeof (zfs_object_ace_t)); | |
263 | case ALLOW: | |
264 | case DENY: | |
265 | entry_type = | |
266 | (((zfs_ace_hdr_t *)acep)->z_flags & ACE_TYPE_FLAGS); | |
267 | if (entry_type == ACE_OWNER || | |
b128c09f | 268 | entry_type == OWNING_GROUP || |
34dc7c2f BB |
269 | entry_type == ACE_EVERYONE) |
270 | return (sizeof (zfs_ace_hdr_t)); | |
271 | /*FALLTHROUGH*/ | |
272 | default: | |
273 | return (sizeof (zfs_ace_t)); | |
274 | } | |
275 | } | |
276 | ||
277 | static size_t | |
278 | zfs_ace_fuid_abstract_size(void) | |
279 | { | |
280 | return (sizeof (zfs_ace_hdr_t)); | |
281 | } | |
282 | ||
283 | static int | |
284 | zfs_ace_fuid_mask_off(void) | |
285 | { | |
286 | return (offsetof(zfs_ace_hdr_t, z_access_mask)); | |
287 | } | |
288 | ||
289 | static int | |
290 | zfs_ace_fuid_data(void *acep, void **datap) | |
291 | { | |
292 | zfs_ace_t *zacep = acep; | |
293 | zfs_object_ace_t *zobjp; | |
294 | ||
295 | switch (zacep->z_hdr.z_type) { | |
296 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
297 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
298 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
299 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
300 | zobjp = acep; | |
301 | *datap = (caddr_t)zobjp + sizeof (zfs_ace_t); | |
302 | return (sizeof (zfs_object_ace_t) - sizeof (zfs_ace_t)); | |
303 | default: | |
304 | *datap = NULL; | |
305 | return (0); | |
306 | } | |
307 | } | |
308 | ||
309 | static acl_ops_t zfs_acl_fuid_ops = { | |
310 | zfs_ace_fuid_get_mask, | |
311 | zfs_ace_fuid_set_mask, | |
312 | zfs_ace_fuid_get_flags, | |
313 | zfs_ace_fuid_set_flags, | |
314 | zfs_ace_fuid_get_type, | |
315 | zfs_ace_fuid_set_type, | |
316 | zfs_ace_fuid_get_who, | |
317 | zfs_ace_fuid_set_who, | |
318 | zfs_ace_fuid_size, | |
319 | zfs_ace_fuid_abstract_size, | |
320 | zfs_ace_fuid_mask_off, | |
321 | zfs_ace_fuid_data | |
322 | }; | |
323 | ||
428870ff BB |
324 | /* |
325 | * The following three functions are provided for compatibility with | |
326 | * older ZPL version in order to determine if the file use to have | |
327 | * an external ACL and what version of ACL previously existed on the | |
328 | * file. Would really be nice to not need this, sigh. | |
329 | */ | |
428870ff BB |
330 | uint64_t |
331 | zfs_external_acl(znode_t *zp) | |
332 | { | |
333 | zfs_acl_phys_t acl_phys; | |
572e2857 | 334 | int error; |
428870ff BB |
335 | |
336 | if (zp->z_is_sa) | |
337 | return (0); | |
338 | ||
572e2857 BB |
339 | /* |
340 | * Need to deal with a potential | |
341 | * race where zfs_sa_upgrade could cause | |
342 | * z_isa_sa to change. | |
343 | * | |
344 | * If the lookup fails then the state of z_is_sa should have | |
345 | * changed. | |
346 | */ | |
428870ff | 347 | |
3558fd73 | 348 | if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(ZTOZSB(zp)), |
572e2857 BB |
349 | &acl_phys, sizeof (acl_phys))) == 0) |
350 | return (acl_phys.z_acl_extern_obj); | |
351 | else { | |
352 | /* | |
353 | * after upgrade the SA_ZPL_ZNODE_ACL should have been | |
354 | * removed | |
355 | */ | |
356 | VERIFY(zp->z_is_sa && error == ENOENT); | |
357 | return (0); | |
358 | } | |
428870ff BB |
359 | } |
360 | ||
361 | /* | |
362 | * Determine size of ACL in bytes | |
363 | * | |
364 | * This is more complicated than it should be since we have to deal | |
365 | * with old external ACLs. | |
366 | */ | |
367 | static int | |
368 | zfs_acl_znode_info(znode_t *zp, int *aclsize, int *aclcount, | |
369 | zfs_acl_phys_t *aclphys) | |
370 | { | |
3558fd73 | 371 | zfs_sb_t *zsb = ZTOZSB(zp); |
428870ff BB |
372 | uint64_t acl_count; |
373 | int size; | |
374 | int error; | |
375 | ||
572e2857 | 376 | ASSERT(MUTEX_HELD(&zp->z_acl_lock)); |
428870ff | 377 | if (zp->z_is_sa) { |
3558fd73 | 378 | if ((error = sa_size(zp->z_sa_hdl, SA_ZPL_DACL_ACES(zsb), |
428870ff BB |
379 | &size)) != 0) |
380 | return (error); | |
381 | *aclsize = size; | |
3558fd73 | 382 | if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_COUNT(zsb), |
428870ff BB |
383 | &acl_count, sizeof (acl_count))) != 0) |
384 | return (error); | |
385 | *aclcount = acl_count; | |
386 | } else { | |
3558fd73 | 387 | if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zsb), |
428870ff BB |
388 | aclphys, sizeof (*aclphys))) != 0) |
389 | return (error); | |
390 | ||
391 | if (aclphys->z_acl_version == ZFS_ACL_VERSION_INITIAL) { | |
392 | *aclsize = ZFS_ACL_SIZE(aclphys->z_acl_size); | |
393 | *aclcount = aclphys->z_acl_size; | |
394 | } else { | |
395 | *aclsize = aclphys->z_acl_size; | |
396 | *aclcount = aclphys->z_acl_count; | |
397 | } | |
398 | } | |
399 | return (0); | |
400 | } | |
401 | ||
402 | int | |
403 | zfs_znode_acl_version(znode_t *zp) | |
404 | { | |
405 | zfs_acl_phys_t acl_phys; | |
406 | ||
572e2857 | 407 | if (zp->z_is_sa) |
428870ff | 408 | return (ZFS_ACL_VERSION_FUID); |
572e2857 BB |
409 | else { |
410 | int error; | |
411 | ||
412 | /* | |
413 | * Need to deal with a potential | |
414 | * race where zfs_sa_upgrade could cause | |
415 | * z_isa_sa to change. | |
416 | * | |
417 | * If the lookup fails then the state of z_is_sa should have | |
418 | * changed. | |
419 | */ | |
420 | if ((error = sa_lookup(zp->z_sa_hdl, | |
3558fd73 | 421 | SA_ZPL_ZNODE_ACL(ZTOZSB(zp)), |
572e2857 BB |
422 | &acl_phys, sizeof (acl_phys))) == 0) |
423 | return (acl_phys.z_acl_version); | |
424 | else { | |
425 | /* | |
426 | * After upgrade SA_ZPL_ZNODE_ACL should have | |
427 | * been removed. | |
428 | */ | |
429 | VERIFY(zp->z_is_sa && error == ENOENT); | |
430 | return (ZFS_ACL_VERSION_FUID); | |
431 | } | |
428870ff BB |
432 | } |
433 | } | |
434 | ||
34dc7c2f BB |
435 | static int |
436 | zfs_acl_version(int version) | |
437 | { | |
438 | if (version < ZPL_VERSION_FUID) | |
439 | return (ZFS_ACL_VERSION_INITIAL); | |
440 | else | |
441 | return (ZFS_ACL_VERSION_FUID); | |
442 | } | |
443 | ||
444 | static int | |
445 | zfs_acl_version_zp(znode_t *zp) | |
446 | { | |
3558fd73 | 447 | return (zfs_acl_version(ZTOZSB(zp)->z_version)); |
34dc7c2f BB |
448 | } |
449 | ||
428870ff | 450 | zfs_acl_t * |
34dc7c2f BB |
451 | zfs_acl_alloc(int vers) |
452 | { | |
453 | zfs_acl_t *aclp; | |
454 | ||
455 | aclp = kmem_zalloc(sizeof (zfs_acl_t), KM_SLEEP); | |
456 | list_create(&aclp->z_acl, sizeof (zfs_acl_node_t), | |
457 | offsetof(zfs_acl_node_t, z_next)); | |
458 | aclp->z_version = vers; | |
459 | if (vers == ZFS_ACL_VERSION_FUID) | |
460 | aclp->z_ops = zfs_acl_fuid_ops; | |
461 | else | |
462 | aclp->z_ops = zfs_acl_v0_ops; | |
463 | return (aclp); | |
464 | } | |
465 | ||
428870ff | 466 | zfs_acl_node_t * |
34dc7c2f BB |
467 | zfs_acl_node_alloc(size_t bytes) |
468 | { | |
469 | zfs_acl_node_t *aclnode; | |
470 | ||
471 | aclnode = kmem_zalloc(sizeof (zfs_acl_node_t), KM_SLEEP); | |
472 | if (bytes) { | |
473 | aclnode->z_acldata = kmem_alloc(bytes, KM_SLEEP); | |
474 | aclnode->z_allocdata = aclnode->z_acldata; | |
475 | aclnode->z_allocsize = bytes; | |
476 | aclnode->z_size = bytes; | |
477 | } | |
478 | ||
479 | return (aclnode); | |
480 | } | |
481 | ||
482 | static void | |
483 | zfs_acl_node_free(zfs_acl_node_t *aclnode) | |
484 | { | |
485 | if (aclnode->z_allocsize) | |
486 | kmem_free(aclnode->z_allocdata, aclnode->z_allocsize); | |
487 | kmem_free(aclnode, sizeof (zfs_acl_node_t)); | |
488 | } | |
489 | ||
490 | static void | |
491 | zfs_acl_release_nodes(zfs_acl_t *aclp) | |
492 | { | |
493 | zfs_acl_node_t *aclnode; | |
494 | ||
149e873a | 495 | while ((aclnode = list_head(&aclp->z_acl))) { |
34dc7c2f BB |
496 | list_remove(&aclp->z_acl, aclnode); |
497 | zfs_acl_node_free(aclnode); | |
498 | } | |
499 | aclp->z_acl_count = 0; | |
500 | aclp->z_acl_bytes = 0; | |
501 | } | |
502 | ||
503 | void | |
504 | zfs_acl_free(zfs_acl_t *aclp) | |
505 | { | |
506 | zfs_acl_release_nodes(aclp); | |
507 | list_destroy(&aclp->z_acl); | |
508 | kmem_free(aclp, sizeof (zfs_acl_t)); | |
509 | } | |
510 | ||
511 | static boolean_t | |
b128c09f | 512 | zfs_acl_valid_ace_type(uint_t type, uint_t flags) |
34dc7c2f | 513 | { |
b128c09f | 514 | uint16_t entry_type; |
34dc7c2f | 515 | |
b128c09f BB |
516 | switch (type) { |
517 | case ALLOW: | |
518 | case DENY: | |
519 | case ACE_SYSTEM_AUDIT_ACE_TYPE: | |
520 | case ACE_SYSTEM_ALARM_ACE_TYPE: | |
521 | entry_type = flags & ACE_TYPE_FLAGS; | |
522 | return (entry_type == ACE_OWNER || | |
523 | entry_type == OWNING_GROUP || | |
524 | entry_type == ACE_EVERYONE || entry_type == 0 || | |
525 | entry_type == ACE_IDENTIFIER_GROUP); | |
34dc7c2f | 526 | default: |
b128c09f BB |
527 | if (type >= MIN_ACE_TYPE && type <= MAX_ACE_TYPE) |
528 | return (B_TRUE); | |
34dc7c2f | 529 | } |
b128c09f BB |
530 | return (B_FALSE); |
531 | } | |
34dc7c2f | 532 | |
b128c09f | 533 | static boolean_t |
3558fd73 | 534 | zfs_ace_valid(umode_t obj_mode, zfs_acl_t *aclp, uint16_t type, uint16_t iflags) |
b128c09f | 535 | { |
34dc7c2f | 536 | /* |
b128c09f | 537 | * first check type of entry |
34dc7c2f BB |
538 | */ |
539 | ||
b128c09f | 540 | if (!zfs_acl_valid_ace_type(type, iflags)) |
34dc7c2f | 541 | return (B_FALSE); |
34dc7c2f BB |
542 | |
543 | switch (type) { | |
544 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
545 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
546 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
547 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
548 | if (aclp->z_version < ZFS_ACL_VERSION_FUID) | |
549 | return (B_FALSE); | |
550 | aclp->z_hints |= ZFS_ACL_OBJ_ACE; | |
551 | } | |
552 | ||
553 | /* | |
b128c09f | 554 | * next check inheritance level flags |
34dc7c2f | 555 | */ |
34dc7c2f | 556 | |
3558fd73 | 557 | if (S_ISDIR(obj_mode) && |
b128c09f | 558 | (iflags & (ACE_FILE_INHERIT_ACE|ACE_DIRECTORY_INHERIT_ACE))) |
34dc7c2f BB |
559 | aclp->z_hints |= ZFS_INHERIT_ACE; |
560 | ||
561 | if (iflags & (ACE_INHERIT_ONLY_ACE|ACE_NO_PROPAGATE_INHERIT_ACE)) { | |
562 | if ((iflags & (ACE_FILE_INHERIT_ACE| | |
563 | ACE_DIRECTORY_INHERIT_ACE)) == 0) { | |
564 | return (B_FALSE); | |
565 | } | |
566 | } | |
567 | ||
568 | return (B_TRUE); | |
569 | } | |
570 | ||
571 | static void * | |
572 | zfs_acl_next_ace(zfs_acl_t *aclp, void *start, uint64_t *who, | |
573 | uint32_t *access_mask, uint16_t *iflags, uint16_t *type) | |
574 | { | |
575 | zfs_acl_node_t *aclnode; | |
576 | ||
428870ff BB |
577 | ASSERT(aclp); |
578 | ||
34dc7c2f BB |
579 | if (start == NULL) { |
580 | aclnode = list_head(&aclp->z_acl); | |
581 | if (aclnode == NULL) | |
582 | return (NULL); | |
583 | ||
584 | aclp->z_next_ace = aclnode->z_acldata; | |
585 | aclp->z_curr_node = aclnode; | |
586 | aclnode->z_ace_idx = 0; | |
587 | } | |
588 | ||
589 | aclnode = aclp->z_curr_node; | |
590 | ||
591 | if (aclnode == NULL) | |
592 | return (NULL); | |
593 | ||
594 | if (aclnode->z_ace_idx >= aclnode->z_ace_count) { | |
595 | aclnode = list_next(&aclp->z_acl, aclnode); | |
596 | if (aclnode == NULL) | |
597 | return (NULL); | |
598 | else { | |
599 | aclp->z_curr_node = aclnode; | |
600 | aclnode->z_ace_idx = 0; | |
601 | aclp->z_next_ace = aclnode->z_acldata; | |
602 | } | |
603 | } | |
604 | ||
605 | if (aclnode->z_ace_idx < aclnode->z_ace_count) { | |
606 | void *acep = aclp->z_next_ace; | |
b128c09f BB |
607 | size_t ace_size; |
608 | ||
609 | /* | |
610 | * Make sure we don't overstep our bounds | |
611 | */ | |
612 | ace_size = aclp->z_ops.ace_size(acep); | |
613 | ||
614 | if (((caddr_t)acep + ace_size) > | |
615 | ((caddr_t)aclnode->z_acldata + aclnode->z_size)) { | |
616 | return (NULL); | |
617 | } | |
618 | ||
34dc7c2f BB |
619 | *iflags = aclp->z_ops.ace_flags_get(acep); |
620 | *type = aclp->z_ops.ace_type_get(acep); | |
621 | *access_mask = aclp->z_ops.ace_mask_get(acep); | |
622 | *who = aclp->z_ops.ace_who_get(acep); | |
b128c09f | 623 | aclp->z_next_ace = (caddr_t)aclp->z_next_ace + ace_size; |
34dc7c2f | 624 | aclnode->z_ace_idx++; |
428870ff | 625 | |
34dc7c2f BB |
626 | return ((void *)acep); |
627 | } | |
628 | return (NULL); | |
629 | } | |
630 | ||
631 | /*ARGSUSED*/ | |
632 | static uint64_t | |
633 | zfs_ace_walk(void *datap, uint64_t cookie, int aclcnt, | |
634 | uint16_t *flags, uint16_t *type, uint32_t *mask) | |
635 | { | |
636 | zfs_acl_t *aclp = datap; | |
637 | zfs_ace_hdr_t *acep = (zfs_ace_hdr_t *)(uintptr_t)cookie; | |
638 | uint64_t who; | |
639 | ||
640 | acep = zfs_acl_next_ace(aclp, acep, &who, mask, | |
641 | flags, type); | |
642 | return ((uint64_t)(uintptr_t)acep); | |
643 | } | |
644 | ||
34dc7c2f BB |
645 | /* |
646 | * Copy ACE to internal ZFS format. | |
647 | * While processing the ACL each ACE will be validated for correctness. | |
648 | * ACE FUIDs will be created later. | |
649 | */ | |
650 | int | |
3558fd73 | 651 | zfs_copy_ace_2_fuid(zfs_sb_t *zsb, umode_t obj_mode, zfs_acl_t *aclp, |
428870ff | 652 | void *datap, zfs_ace_t *z_acl, uint64_t aclcnt, size_t *size, |
9babb374 | 653 | zfs_fuid_info_t **fuidp, cred_t *cr) |
34dc7c2f BB |
654 | { |
655 | int i; | |
656 | uint16_t entry_type; | |
657 | zfs_ace_t *aceptr = z_acl; | |
658 | ace_t *acep = datap; | |
659 | zfs_object_ace_t *zobjacep; | |
660 | ace_object_t *aceobjp; | |
661 | ||
662 | for (i = 0; i != aclcnt; i++) { | |
663 | aceptr->z_hdr.z_access_mask = acep->a_access_mask; | |
664 | aceptr->z_hdr.z_flags = acep->a_flags; | |
665 | aceptr->z_hdr.z_type = acep->a_type; | |
666 | entry_type = aceptr->z_hdr.z_flags & ACE_TYPE_FLAGS; | |
667 | if (entry_type != ACE_OWNER && entry_type != OWNING_GROUP && | |
668 | entry_type != ACE_EVERYONE) { | |
3558fd73 | 669 | aceptr->z_fuid = zfs_fuid_create(zsb, acep->a_who, |
9babb374 BB |
670 | cr, (entry_type == 0) ? |
671 | ZFS_ACE_USER : ZFS_ACE_GROUP, fuidp); | |
34dc7c2f BB |
672 | } |
673 | ||
674 | /* | |
675 | * Make sure ACE is valid | |
676 | */ | |
3558fd73 | 677 | if (zfs_ace_valid(obj_mode, aclp, aceptr->z_hdr.z_type, |
34dc7c2f BB |
678 | aceptr->z_hdr.z_flags) != B_TRUE) |
679 | return (EINVAL); | |
680 | ||
681 | switch (acep->a_type) { | |
682 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
683 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
684 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
685 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
686 | zobjacep = (zfs_object_ace_t *)aceptr; | |
687 | aceobjp = (ace_object_t *)acep; | |
688 | ||
689 | bcopy(aceobjp->a_obj_type, zobjacep->z_object_type, | |
690 | sizeof (aceobjp->a_obj_type)); | |
691 | bcopy(aceobjp->a_inherit_obj_type, | |
692 | zobjacep->z_inherit_type, | |
693 | sizeof (aceobjp->a_inherit_obj_type)); | |
694 | acep = (ace_t *)((caddr_t)acep + sizeof (ace_object_t)); | |
695 | break; | |
696 | default: | |
697 | acep = (ace_t *)((caddr_t)acep + sizeof (ace_t)); | |
698 | } | |
699 | ||
700 | aceptr = (zfs_ace_t *)((caddr_t)aceptr + | |
701 | aclp->z_ops.ace_size(aceptr)); | |
702 | } | |
703 | ||
704 | *size = (caddr_t)aceptr - (caddr_t)z_acl; | |
705 | ||
706 | return (0); | |
707 | } | |
708 | ||
709 | /* | |
710 | * Copy ZFS ACEs to fixed size ace_t layout | |
711 | */ | |
712 | static void | |
3558fd73 | 713 | zfs_copy_fuid_2_ace(zfs_sb_t *zsb, zfs_acl_t *aclp, cred_t *cr, |
34dc7c2f BB |
714 | void *datap, int filter) |
715 | { | |
716 | uint64_t who; | |
717 | uint32_t access_mask; | |
718 | uint16_t iflags, type; | |
719 | zfs_ace_hdr_t *zacep = NULL; | |
720 | ace_t *acep = datap; | |
721 | ace_object_t *objacep; | |
722 | zfs_object_ace_t *zobjacep; | |
723 | size_t ace_size; | |
724 | uint16_t entry_type; | |
725 | ||
149e873a BB |
726 | while ((zacep = zfs_acl_next_ace(aclp, zacep, |
727 | &who, &access_mask, &iflags, &type))) { | |
34dc7c2f BB |
728 | |
729 | switch (type) { | |
730 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
731 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
732 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
733 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
734 | if (filter) { | |
735 | continue; | |
736 | } | |
737 | zobjacep = (zfs_object_ace_t *)zacep; | |
738 | objacep = (ace_object_t *)acep; | |
739 | bcopy(zobjacep->z_object_type, | |
740 | objacep->a_obj_type, | |
741 | sizeof (zobjacep->z_object_type)); | |
742 | bcopy(zobjacep->z_inherit_type, | |
743 | objacep->a_inherit_obj_type, | |
744 | sizeof (zobjacep->z_inherit_type)); | |
745 | ace_size = sizeof (ace_object_t); | |
746 | break; | |
747 | default: | |
748 | ace_size = sizeof (ace_t); | |
749 | break; | |
750 | } | |
751 | ||
752 | entry_type = (iflags & ACE_TYPE_FLAGS); | |
753 | if ((entry_type != ACE_OWNER && | |
b128c09f | 754 | entry_type != OWNING_GROUP && |
34dc7c2f | 755 | entry_type != ACE_EVERYONE)) { |
3558fd73 | 756 | acep->a_who = zfs_fuid_map_id(zsb, who, |
34dc7c2f BB |
757 | cr, (entry_type & ACE_IDENTIFIER_GROUP) ? |
758 | ZFS_ACE_GROUP : ZFS_ACE_USER); | |
759 | } else { | |
760 | acep->a_who = (uid_t)(int64_t)who; | |
761 | } | |
762 | acep->a_access_mask = access_mask; | |
763 | acep->a_flags = iflags; | |
764 | acep->a_type = type; | |
765 | acep = (ace_t *)((caddr_t)acep + ace_size); | |
766 | } | |
767 | } | |
768 | ||
769 | static int | |
3558fd73 | 770 | zfs_copy_ace_2_oldace(umode_t obj_mode, zfs_acl_t *aclp, ace_t *acep, |
34dc7c2f BB |
771 | zfs_oldace_t *z_acl, int aclcnt, size_t *size) |
772 | { | |
773 | int i; | |
774 | zfs_oldace_t *aceptr = z_acl; | |
775 | ||
776 | for (i = 0; i != aclcnt; i++, aceptr++) { | |
777 | aceptr->z_access_mask = acep[i].a_access_mask; | |
778 | aceptr->z_type = acep[i].a_type; | |
779 | aceptr->z_flags = acep[i].a_flags; | |
780 | aceptr->z_fuid = acep[i].a_who; | |
781 | /* | |
782 | * Make sure ACE is valid | |
783 | */ | |
3558fd73 | 784 | if (zfs_ace_valid(obj_mode, aclp, aceptr->z_type, |
34dc7c2f BB |
785 | aceptr->z_flags) != B_TRUE) |
786 | return (EINVAL); | |
787 | } | |
788 | *size = (caddr_t)aceptr - (caddr_t)z_acl; | |
789 | return (0); | |
790 | } | |
791 | ||
792 | /* | |
793 | * convert old ACL format to new | |
794 | */ | |
795 | void | |
9babb374 | 796 | zfs_acl_xform(znode_t *zp, zfs_acl_t *aclp, cred_t *cr) |
34dc7c2f BB |
797 | { |
798 | zfs_oldace_t *oldaclp; | |
799 | int i; | |
800 | uint16_t type, iflags; | |
801 | uint32_t access_mask; | |
802 | uint64_t who; | |
803 | void *cookie = NULL; | |
804 | zfs_acl_node_t *newaclnode; | |
805 | ||
806 | ASSERT(aclp->z_version == ZFS_ACL_VERSION_INITIAL); | |
807 | /* | |
808 | * First create the ACE in a contiguous piece of memory | |
809 | * for zfs_copy_ace_2_fuid(). | |
810 | * | |
811 | * We only convert an ACL once, so this won't happen | |
812 | * everytime. | |
813 | */ | |
814 | oldaclp = kmem_alloc(sizeof (zfs_oldace_t) * aclp->z_acl_count, | |
815 | KM_SLEEP); | |
816 | i = 0; | |
149e873a BB |
817 | while ((cookie = zfs_acl_next_ace(aclp, cookie, &who, |
818 | &access_mask, &iflags, &type))) { | |
34dc7c2f BB |
819 | oldaclp[i].z_flags = iflags; |
820 | oldaclp[i].z_type = type; | |
821 | oldaclp[i].z_fuid = who; | |
822 | oldaclp[i++].z_access_mask = access_mask; | |
823 | } | |
824 | ||
825 | newaclnode = zfs_acl_node_alloc(aclp->z_acl_count * | |
826 | sizeof (zfs_object_ace_t)); | |
827 | aclp->z_ops = zfs_acl_fuid_ops; | |
3558fd73 BB |
828 | VERIFY(zfs_copy_ace_2_fuid(ZTOZSB(zp), ZTOI(zp)->i_mode, |
829 | aclp, oldaclp, newaclnode->z_acldata, aclp->z_acl_count, | |
9babb374 | 830 | &newaclnode->z_size, NULL, cr) == 0); |
34dc7c2f BB |
831 | newaclnode->z_ace_count = aclp->z_acl_count; |
832 | aclp->z_version = ZFS_ACL_VERSION; | |
833 | kmem_free(oldaclp, aclp->z_acl_count * sizeof (zfs_oldace_t)); | |
834 | ||
835 | /* | |
836 | * Release all previous ACL nodes | |
837 | */ | |
838 | ||
839 | zfs_acl_release_nodes(aclp); | |
840 | ||
841 | list_insert_head(&aclp->z_acl, newaclnode); | |
842 | ||
843 | aclp->z_acl_bytes = newaclnode->z_size; | |
844 | aclp->z_acl_count = newaclnode->z_ace_count; | |
845 | ||
846 | } | |
847 | ||
848 | /* | |
849 | * Convert unix access mask to v4 access mask | |
850 | */ | |
851 | static uint32_t | |
852 | zfs_unix_to_v4(uint32_t access_mask) | |
853 | { | |
854 | uint32_t new_mask = 0; | |
855 | ||
856 | if (access_mask & S_IXOTH) | |
857 | new_mask |= ACE_EXECUTE; | |
858 | if (access_mask & S_IWOTH) | |
859 | new_mask |= ACE_WRITE_DATA; | |
860 | if (access_mask & S_IROTH) | |
861 | new_mask |= ACE_READ_DATA; | |
862 | return (new_mask); | |
863 | } | |
864 | ||
865 | static void | |
866 | zfs_set_ace(zfs_acl_t *aclp, void *acep, uint32_t access_mask, | |
867 | uint16_t access_type, uint64_t fuid, uint16_t entry_type) | |
868 | { | |
869 | uint16_t type = entry_type & ACE_TYPE_FLAGS; | |
870 | ||
871 | aclp->z_ops.ace_mask_set(acep, access_mask); | |
872 | aclp->z_ops.ace_type_set(acep, access_type); | |
873 | aclp->z_ops.ace_flags_set(acep, entry_type); | |
b128c09f | 874 | if ((type != ACE_OWNER && type != OWNING_GROUP && |
34dc7c2f BB |
875 | type != ACE_EVERYONE)) |
876 | aclp->z_ops.ace_who_set(acep, fuid); | |
877 | } | |
878 | ||
879 | /* | |
880 | * Determine mode of file based on ACL. | |
881 | * Also, create FUIDs for any User/Group ACEs | |
882 | */ | |
428870ff BB |
883 | uint64_t |
884 | zfs_mode_compute(uint64_t fmode, zfs_acl_t *aclp, | |
885 | uint64_t *pflags, uint64_t fuid, uint64_t fgid) | |
34dc7c2f BB |
886 | { |
887 | int entry_type; | |
888 | mode_t mode; | |
889 | mode_t seen = 0; | |
890 | zfs_ace_hdr_t *acep = NULL; | |
891 | uint64_t who; | |
892 | uint16_t iflags, type; | |
893 | uint32_t access_mask; | |
45d1cae3 | 894 | boolean_t an_exec_denied = B_FALSE; |
34dc7c2f | 895 | |
428870ff | 896 | mode = (fmode & (S_IFMT | S_ISUID | S_ISGID | S_ISVTX)); |
34dc7c2f | 897 | |
149e873a BB |
898 | while ((acep = zfs_acl_next_ace(aclp, acep, &who, |
899 | &access_mask, &iflags, &type))) { | |
34dc7c2f | 900 | |
b128c09f | 901 | if (!zfs_acl_valid_ace_type(type, iflags)) |
34dc7c2f BB |
902 | continue; |
903 | ||
904 | entry_type = (iflags & ACE_TYPE_FLAGS); | |
905 | ||
b128c09f BB |
906 | /* |
907 | * Skip over owner@, group@ or everyone@ inherit only ACEs | |
908 | */ | |
909 | if ((iflags & ACE_INHERIT_ONLY_ACE) && | |
910 | (entry_type == ACE_OWNER || entry_type == ACE_EVERYONE || | |
911 | entry_type == OWNING_GROUP)) | |
912 | continue; | |
913 | ||
428870ff BB |
914 | if (entry_type == ACE_OWNER || (entry_type == 0 && |
915 | who == fuid)) { | |
34dc7c2f BB |
916 | if ((access_mask & ACE_READ_DATA) && |
917 | (!(seen & S_IRUSR))) { | |
918 | seen |= S_IRUSR; | |
919 | if (type == ALLOW) { | |
920 | mode |= S_IRUSR; | |
921 | } | |
922 | } | |
923 | if ((access_mask & ACE_WRITE_DATA) && | |
924 | (!(seen & S_IWUSR))) { | |
925 | seen |= S_IWUSR; | |
926 | if (type == ALLOW) { | |
927 | mode |= S_IWUSR; | |
928 | } | |
929 | } | |
930 | if ((access_mask & ACE_EXECUTE) && | |
931 | (!(seen & S_IXUSR))) { | |
932 | seen |= S_IXUSR; | |
933 | if (type == ALLOW) { | |
934 | mode |= S_IXUSR; | |
935 | } | |
936 | } | |
428870ff BB |
937 | } else if (entry_type == OWNING_GROUP || |
938 | (entry_type == ACE_IDENTIFIER_GROUP && who == fgid)) { | |
34dc7c2f BB |
939 | if ((access_mask & ACE_READ_DATA) && |
940 | (!(seen & S_IRGRP))) { | |
941 | seen |= S_IRGRP; | |
942 | if (type == ALLOW) { | |
943 | mode |= S_IRGRP; | |
944 | } | |
945 | } | |
946 | if ((access_mask & ACE_WRITE_DATA) && | |
947 | (!(seen & S_IWGRP))) { | |
948 | seen |= S_IWGRP; | |
949 | if (type == ALLOW) { | |
950 | mode |= S_IWGRP; | |
951 | } | |
952 | } | |
953 | if ((access_mask & ACE_EXECUTE) && | |
954 | (!(seen & S_IXGRP))) { | |
955 | seen |= S_IXGRP; | |
956 | if (type == ALLOW) { | |
957 | mode |= S_IXGRP; | |
958 | } | |
959 | } | |
960 | } else if (entry_type == ACE_EVERYONE) { | |
961 | if ((access_mask & ACE_READ_DATA)) { | |
962 | if (!(seen & S_IRUSR)) { | |
963 | seen |= S_IRUSR; | |
964 | if (type == ALLOW) { | |
965 | mode |= S_IRUSR; | |
966 | } | |
967 | } | |
968 | if (!(seen & S_IRGRP)) { | |
969 | seen |= S_IRGRP; | |
970 | if (type == ALLOW) { | |
971 | mode |= S_IRGRP; | |
972 | } | |
973 | } | |
974 | if (!(seen & S_IROTH)) { | |
975 | seen |= S_IROTH; | |
976 | if (type == ALLOW) { | |
977 | mode |= S_IROTH; | |
978 | } | |
979 | } | |
980 | } | |
981 | if ((access_mask & ACE_WRITE_DATA)) { | |
982 | if (!(seen & S_IWUSR)) { | |
983 | seen |= S_IWUSR; | |
984 | if (type == ALLOW) { | |
985 | mode |= S_IWUSR; | |
986 | } | |
987 | } | |
988 | if (!(seen & S_IWGRP)) { | |
989 | seen |= S_IWGRP; | |
990 | if (type == ALLOW) { | |
991 | mode |= S_IWGRP; | |
992 | } | |
993 | } | |
994 | if (!(seen & S_IWOTH)) { | |
995 | seen |= S_IWOTH; | |
996 | if (type == ALLOW) { | |
997 | mode |= S_IWOTH; | |
998 | } | |
999 | } | |
1000 | } | |
1001 | if ((access_mask & ACE_EXECUTE)) { | |
1002 | if (!(seen & S_IXUSR)) { | |
1003 | seen |= S_IXUSR; | |
1004 | if (type == ALLOW) { | |
1005 | mode |= S_IXUSR; | |
1006 | } | |
1007 | } | |
1008 | if (!(seen & S_IXGRP)) { | |
1009 | seen |= S_IXGRP; | |
1010 | if (type == ALLOW) { | |
1011 | mode |= S_IXGRP; | |
1012 | } | |
1013 | } | |
1014 | if (!(seen & S_IXOTH)) { | |
1015 | seen |= S_IXOTH; | |
1016 | if (type == ALLOW) { | |
1017 | mode |= S_IXOTH; | |
1018 | } | |
1019 | } | |
1020 | } | |
45d1cae3 BB |
1021 | } else { |
1022 | /* | |
1023 | * Only care if this IDENTIFIER_GROUP or | |
1024 | * USER ACE denies execute access to someone, | |
1025 | * mode is not affected | |
1026 | */ | |
1027 | if ((access_mask & ACE_EXECUTE) && type == DENY) | |
1028 | an_exec_denied = B_TRUE; | |
34dc7c2f | 1029 | } |
34dc7c2f | 1030 | } |
45d1cae3 BB |
1031 | |
1032 | /* | |
1033 | * Failure to allow is effectively a deny, so execute permission | |
1034 | * is denied if it was never mentioned or if we explicitly | |
1035 | * weren't allowed it. | |
1036 | */ | |
1037 | if (!an_exec_denied && | |
1038 | ((seen & ALL_MODE_EXECS) != ALL_MODE_EXECS || | |
1039 | (mode & ALL_MODE_EXECS) != ALL_MODE_EXECS)) | |
1040 | an_exec_denied = B_TRUE; | |
1041 | ||
1042 | if (an_exec_denied) | |
428870ff | 1043 | *pflags &= ~ZFS_NO_EXECS_DENIED; |
45d1cae3 | 1044 | else |
428870ff | 1045 | *pflags |= ZFS_NO_EXECS_DENIED; |
45d1cae3 | 1046 | |
34dc7c2f BB |
1047 | return (mode); |
1048 | } | |
1049 | ||
34dc7c2f | 1050 | /* |
45d1cae3 BB |
1051 | * Read an external acl object. If the intent is to modify, always |
1052 | * create a new acl and leave any cached acl in place. | |
34dc7c2f BB |
1053 | */ |
1054 | static int | |
572e2857 BB |
1055 | zfs_acl_node_read(znode_t *zp, boolean_t have_lock, zfs_acl_t **aclpp, |
1056 | boolean_t will_modify) | |
34dc7c2f | 1057 | { |
34dc7c2f | 1058 | zfs_acl_t *aclp; |
428870ff BB |
1059 | int aclsize; |
1060 | int acl_count; | |
34dc7c2f | 1061 | zfs_acl_node_t *aclnode; |
428870ff BB |
1062 | zfs_acl_phys_t znode_acl; |
1063 | int version; | |
1064 | int error; | |
572e2857 | 1065 | boolean_t drop_lock = B_FALSE; |
34dc7c2f BB |
1066 | |
1067 | ASSERT(MUTEX_HELD(&zp->z_acl_lock)); | |
1068 | ||
45d1cae3 BB |
1069 | if (zp->z_acl_cached && !will_modify) { |
1070 | *aclpp = zp->z_acl_cached; | |
1071 | return (0); | |
1072 | } | |
1073 | ||
572e2857 BB |
1074 | /* |
1075 | * close race where znode could be upgrade while trying to | |
1076 | * read the znode attributes. | |
1077 | * | |
1078 | * But this could only happen if the file isn't already an SA | |
1079 | * znode | |
1080 | */ | |
1081 | if (!zp->z_is_sa && !have_lock) { | |
1082 | mutex_enter(&zp->z_lock); | |
1083 | drop_lock = B_TRUE; | |
1084 | } | |
1085 | version = zfs_znode_acl_version(zp); | |
34dc7c2f | 1086 | |
428870ff | 1087 | if ((error = zfs_acl_znode_info(zp, &aclsize, |
572e2857 BB |
1088 | &acl_count, &znode_acl)) != 0) { |
1089 | goto done; | |
1090 | } | |
428870ff BB |
1091 | |
1092 | aclp = zfs_acl_alloc(version); | |
34dc7c2f | 1093 | |
34dc7c2f BB |
1094 | aclp->z_acl_count = acl_count; |
1095 | aclp->z_acl_bytes = aclsize; | |
1096 | ||
428870ff BB |
1097 | aclnode = zfs_acl_node_alloc(aclsize); |
1098 | aclnode->z_ace_count = aclp->z_acl_count; | |
1099 | aclnode->z_size = aclsize; | |
1100 | ||
1101 | if (!zp->z_is_sa) { | |
1102 | if (znode_acl.z_acl_extern_obj) { | |
3558fd73 | 1103 | error = dmu_read(ZTOZSB(zp)->z_os, |
428870ff BB |
1104 | znode_acl.z_acl_extern_obj, 0, aclnode->z_size, |
1105 | aclnode->z_acldata, DMU_READ_PREFETCH); | |
1106 | } else { | |
1107 | bcopy(znode_acl.z_ace_data, aclnode->z_acldata, | |
1108 | aclnode->z_size); | |
1109 | } | |
1110 | } else { | |
3558fd73 | 1111 | error = sa_lookup(zp->z_sa_hdl, SA_ZPL_DACL_ACES(ZTOZSB(zp)), |
428870ff BB |
1112 | aclnode->z_acldata, aclnode->z_size); |
1113 | } | |
1114 | ||
34dc7c2f BB |
1115 | if (error != 0) { |
1116 | zfs_acl_free(aclp); | |
428870ff | 1117 | zfs_acl_node_free(aclnode); |
b128c09f BB |
1118 | /* convert checksum errors into IO errors */ |
1119 | if (error == ECKSUM) | |
1120 | error = EIO; | |
572e2857 | 1121 | goto done; |
34dc7c2f BB |
1122 | } |
1123 | ||
428870ff BB |
1124 | list_insert_head(&aclp->z_acl, aclnode); |
1125 | ||
34dc7c2f | 1126 | *aclpp = aclp; |
45d1cae3 BB |
1127 | if (!will_modify) |
1128 | zp->z_acl_cached = aclp; | |
572e2857 BB |
1129 | done: |
1130 | if (drop_lock) | |
1131 | mutex_exit(&zp->z_lock); | |
1132 | return (error); | |
34dc7c2f BB |
1133 | } |
1134 | ||
428870ff BB |
1135 | /*ARGSUSED*/ |
1136 | void | |
1137 | zfs_acl_data_locator(void **dataptr, uint32_t *length, uint32_t buflen, | |
1138 | boolean_t start, void *userdata) | |
1139 | { | |
1140 | zfs_acl_locator_cb_t *cb = (zfs_acl_locator_cb_t *)userdata; | |
1141 | ||
1142 | if (start) { | |
1143 | cb->cb_acl_node = list_head(&cb->cb_aclp->z_acl); | |
1144 | } else { | |
1145 | cb->cb_acl_node = list_next(&cb->cb_aclp->z_acl, | |
1146 | cb->cb_acl_node); | |
1147 | } | |
1148 | *dataptr = cb->cb_acl_node->z_acldata; | |
1149 | *length = cb->cb_acl_node->z_size; | |
1150 | } | |
1151 | ||
428870ff BB |
1152 | int |
1153 | zfs_acl_chown_setattr(znode_t *zp) | |
1154 | { | |
1155 | int error; | |
1156 | zfs_acl_t *aclp; | |
428870ff | 1157 | |
572e2857 BB |
1158 | ASSERT(MUTEX_HELD(&zp->z_lock)); |
1159 | ASSERT(MUTEX_HELD(&zp->z_acl_lock)); | |
428870ff | 1160 | |
572e2857 | 1161 | if ((error = zfs_acl_node_read(zp, B_TRUE, &aclp, B_FALSE)) == 0) |
428870ff | 1162 | zp->z_mode = zfs_mode_compute(zp->z_mode, aclp, |
572e2857 | 1163 | &zp->z_pflags, zp->z_uid, zp->z_gid); |
428870ff BB |
1164 | return (error); |
1165 | } | |
1166 | ||
538f669f BB |
1167 | static void |
1168 | acl_trivial_access_masks(mode_t mode, uint32_t *allow0, uint32_t *deny1, | |
1169 | uint32_t *deny2, uint32_t *owner, uint32_t *group, uint32_t *everyone) | |
1170 | { | |
1171 | *deny1 = *deny2 = *allow0 = *group = 0; | |
1172 | ||
1173 | if (!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH))) | |
1174 | *deny1 |= ACE_READ_DATA; | |
1175 | if (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH))) | |
1176 | *deny1 |= ACE_WRITE_DATA; | |
1177 | if (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH))) | |
1178 | *deny1 |= ACE_EXECUTE; | |
1179 | ||
1180 | if (!(mode & S_IRGRP) && (mode & S_IROTH)) | |
1181 | *deny2 = ACE_READ_DATA; | |
1182 | if (!(mode & S_IWGRP) && (mode & S_IWOTH)) | |
1183 | *deny2 |= ACE_WRITE_DATA; | |
1184 | if (!(mode & S_IXGRP) && (mode & S_IXOTH)) | |
1185 | *deny2 |= ACE_EXECUTE; | |
1186 | ||
1187 | if ((mode & S_IRUSR) && (!(mode & S_IRGRP) && (mode & S_IROTH))) | |
1188 | *allow0 |= ACE_READ_DATA; | |
1189 | if ((mode & S_IWUSR) && (!(mode & S_IWGRP) && (mode & S_IWOTH))) | |
1190 | *allow0 |= ACE_WRITE_DATA; | |
1191 | if ((mode & S_IXUSR) && (!(mode & S_IXGRP) && (mode & S_IXOTH))) | |
1192 | *allow0 |= ACE_EXECUTE; | |
1193 | ||
1194 | *owner = ACE_WRITE_ATTRIBUTES|ACE_WRITE_OWNER|ACE_WRITE_ACL| | |
1195 | ACE_WRITE_NAMED_ATTRS|ACE_READ_ACL|ACE_READ_ATTRIBUTES| | |
1196 | ACE_READ_NAMED_ATTRS|ACE_SYNCHRONIZE; | |
1197 | if (mode & S_IRUSR) | |
1198 | *owner |= ACE_READ_DATA; | |
1199 | if (mode & S_IWUSR) | |
1200 | *owner |= ACE_WRITE_DATA|ACE_APPEND_DATA; | |
1201 | if (mode & S_IXUSR) | |
1202 | *owner |= ACE_EXECUTE; | |
1203 | ||
1204 | *group = ACE_READ_ACL|ACE_READ_ATTRIBUTES| ACE_READ_NAMED_ATTRS| | |
1205 | ACE_SYNCHRONIZE; | |
1206 | if (mode & S_IRGRP) | |
1207 | *group |= ACE_READ_DATA; | |
1208 | if (mode & S_IWGRP) | |
1209 | *group |= ACE_WRITE_DATA|ACE_APPEND_DATA; | |
1210 | if (mode & S_IXGRP) | |
1211 | *group |= ACE_EXECUTE; | |
1212 | ||
1213 | *everyone = ACE_READ_ACL|ACE_READ_ATTRIBUTES| ACE_READ_NAMED_ATTRS| | |
1214 | ACE_SYNCHRONIZE; | |
1215 | if (mode & S_IROTH) | |
1216 | *everyone |= ACE_READ_DATA; | |
1217 | if (mode & S_IWOTH) | |
1218 | *everyone |= ACE_WRITE_DATA|ACE_APPEND_DATA; | |
1219 | if (mode & S_IXOTH) | |
1220 | *everyone |= ACE_EXECUTE; | |
1221 | } | |
1222 | ||
1223 | /* | |
1224 | * ace_trivial: | |
1225 | * determine whether an ace_t acl is trivial | |
1226 | * | |
1227 | * Trivialness implies that the acl is composed of only | |
1228 | * owner, group, everyone entries. ACL can't | |
1229 | * have read_acl denied, and write_owner/write_acl/write_attributes | |
1230 | * can only be owner@ entry. | |
1231 | */ | |
1232 | static int | |
1233 | ace_trivial_common(void *acep, int aclcnt, | |
1234 | uint64_t (*walk)(void *, uint64_t, int aclcnt, | |
1235 | uint16_t *, uint16_t *, uint32_t *)) | |
1236 | { | |
1237 | uint16_t flags; | |
1238 | uint32_t mask; | |
1239 | uint16_t type; | |
1240 | uint64_t cookie = 0; | |
1241 | ||
1242 | while ((cookie = walk(acep, cookie, aclcnt, &flags, &type, &mask))) { | |
1243 | switch (flags & ACE_TYPE_FLAGS) { | |
1244 | case ACE_OWNER: | |
1245 | case ACE_GROUP|ACE_IDENTIFIER_GROUP: | |
1246 | case ACE_EVERYONE: | |
1247 | break; | |
1248 | default: | |
1249 | return (1); | |
1250 | } | |
1251 | ||
1252 | if (flags & (ACE_FILE_INHERIT_ACE| | |
1253 | ACE_DIRECTORY_INHERIT_ACE|ACE_NO_PROPAGATE_INHERIT_ACE| | |
1254 | ACE_INHERIT_ONLY_ACE)) | |
1255 | return (1); | |
1256 | ||
1257 | /* | |
1258 | * Special check for some special bits | |
1259 | * | |
1260 | * Don't allow anybody to deny reading basic | |
1261 | * attributes or a files ACL. | |
1262 | */ | |
1263 | if ((mask & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) && | |
1264 | (type == ACE_ACCESS_DENIED_ACE_TYPE)) | |
1265 | return (1); | |
1266 | ||
1267 | /* | |
1268 | * Delete permissions are never set by default | |
1269 | */ | |
1270 | if (mask & (ACE_DELETE|ACE_DELETE_CHILD)) | |
1271 | return (1); | |
1272 | /* | |
1273 | * only allow owner@ to have | |
1274 | * write_acl/write_owner/write_attributes/write_xattr/ | |
1275 | */ | |
1276 | if (type == ACE_ACCESS_ALLOWED_ACE_TYPE && | |
1277 | (!(flags & ACE_OWNER) && (mask & | |
1278 | (ACE_WRITE_OWNER|ACE_WRITE_ACL| ACE_WRITE_ATTRIBUTES| | |
1279 | ACE_WRITE_NAMED_ATTRS)))) | |
1280 | return (1); | |
1281 | ||
1282 | } | |
1283 | ||
1284 | return (0); | |
1285 | } | |
1286 | ||
34dc7c2f BB |
1287 | /* |
1288 | * common code for setting ACLs. | |
1289 | * | |
1290 | * This function is called from zfs_mode_update, zfs_perm_init, and zfs_setacl. | |
1291 | * zfs_setacl passes a non-NULL inherit pointer (ihp) to indicate that it's | |
1292 | * already checked the acl and knows whether to inherit. | |
1293 | */ | |
1294 | int | |
9babb374 | 1295 | zfs_aclset_common(znode_t *zp, zfs_acl_t *aclp, cred_t *cr, dmu_tx_t *tx) |
34dc7c2f | 1296 | { |
428870ff | 1297 | int error; |
3558fd73 | 1298 | zfs_sb_t *zsb = ZTOZSB(zp); |
428870ff BB |
1299 | dmu_object_type_t otype; |
1300 | zfs_acl_locator_cb_t locate = { 0 }; | |
1301 | uint64_t mode; | |
1302 | sa_bulk_attr_t bulk[5]; | |
1303 | uint64_t ctime[2]; | |
1304 | int count = 0; | |
428870ff BB |
1305 | |
1306 | mode = zp->z_mode; | |
1307 | ||
572e2857 BB |
1308 | mode = zfs_mode_compute(mode, aclp, &zp->z_pflags, |
1309 | zp->z_uid, zp->z_gid); | |
34dc7c2f | 1310 | |
428870ff | 1311 | zp->z_mode = mode; |
3558fd73 | 1312 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zsb), NULL, |
428870ff | 1313 | &mode, sizeof (mode)); |
3558fd73 | 1314 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zsb), NULL, |
428870ff | 1315 | &zp->z_pflags, sizeof (zp->z_pflags)); |
3558fd73 | 1316 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zsb), NULL, |
428870ff | 1317 | &ctime, sizeof (ctime)); |
34dc7c2f | 1318 | |
45d1cae3 BB |
1319 | if (zp->z_acl_cached) { |
1320 | zfs_acl_free(zp->z_acl_cached); | |
1321 | zp->z_acl_cached = NULL; | |
1322 | } | |
1323 | ||
34dc7c2f | 1324 | /* |
428870ff | 1325 | * Upgrade needed? |
34dc7c2f | 1326 | */ |
3558fd73 | 1327 | if (!zsb->z_use_fuids) { |
34dc7c2f BB |
1328 | otype = DMU_OT_OLDACL; |
1329 | } else { | |
1330 | if ((aclp->z_version == ZFS_ACL_VERSION_INITIAL) && | |
3558fd73 | 1331 | (zsb->z_version >= ZPL_VERSION_FUID)) |
9babb374 | 1332 | zfs_acl_xform(zp, aclp, cr); |
34dc7c2f BB |
1333 | ASSERT(aclp->z_version >= ZFS_ACL_VERSION_FUID); |
1334 | otype = DMU_OT_ACL; | |
1335 | } | |
1336 | ||
428870ff BB |
1337 | /* |
1338 | * Arrgh, we have to handle old on disk format | |
1339 | * as well as newer (preferred) SA format. | |
1340 | */ | |
1341 | ||
1342 | if (zp->z_is_sa) { /* the easy case, just update the ACL attribute */ | |
1343 | locate.cb_aclp = aclp; | |
3558fd73 | 1344 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_ACES(zsb), |
428870ff | 1345 | zfs_acl_data_locator, &locate, aclp->z_acl_bytes); |
3558fd73 | 1346 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_DACL_COUNT(zsb), |
428870ff BB |
1347 | NULL, &aclp->z_acl_count, sizeof (uint64_t)); |
1348 | } else { /* Painful legacy way */ | |
1349 | zfs_acl_node_t *aclnode; | |
1350 | uint64_t off = 0; | |
1351 | zfs_acl_phys_t acl_phys; | |
1352 | uint64_t aoid; | |
1353 | ||
3558fd73 | 1354 | if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_ZNODE_ACL(zsb), |
428870ff BB |
1355 | &acl_phys, sizeof (acl_phys))) != 0) |
1356 | return (error); | |
1357 | ||
1358 | aoid = acl_phys.z_acl_extern_obj; | |
1359 | ||
1360 | if (aclp->z_acl_bytes > ZFS_ACE_SPACE) { | |
1361 | /* | |
1362 | * If ACL was previously external and we are now | |
1363 | * converting to new ACL format then release old | |
1364 | * ACL object and create a new one. | |
1365 | */ | |
1366 | if (aoid && | |
1367 | aclp->z_version != acl_phys.z_acl_version) { | |
3558fd73 | 1368 | error = dmu_object_free(zsb->z_os, aoid, tx); |
428870ff BB |
1369 | if (error) |
1370 | return (error); | |
1371 | aoid = 0; | |
1372 | } | |
1373 | if (aoid == 0) { | |
3558fd73 | 1374 | aoid = dmu_object_alloc(zsb->z_os, |
428870ff BB |
1375 | otype, aclp->z_acl_bytes, |
1376 | otype == DMU_OT_ACL ? | |
1377 | DMU_OT_SYSACL : DMU_OT_NONE, | |
1378 | otype == DMU_OT_ACL ? | |
1379 | DN_MAX_BONUSLEN : 0, tx); | |
1380 | } else { | |
3558fd73 | 1381 | (void) dmu_object_set_blocksize(zsb->z_os, |
428870ff BB |
1382 | aoid, aclp->z_acl_bytes, 0, tx); |
1383 | } | |
1384 | acl_phys.z_acl_extern_obj = aoid; | |
1385 | for (aclnode = list_head(&aclp->z_acl); aclnode; | |
1386 | aclnode = list_next(&aclp->z_acl, aclnode)) { | |
1387 | if (aclnode->z_ace_count == 0) | |
1388 | continue; | |
3558fd73 | 1389 | dmu_write(zsb->z_os, aoid, off, |
428870ff BB |
1390 | aclnode->z_size, aclnode->z_acldata, tx); |
1391 | off += aclnode->z_size; | |
1392 | } | |
34dc7c2f | 1393 | } else { |
428870ff BB |
1394 | void *start = acl_phys.z_ace_data; |
1395 | /* | |
1396 | * Migrating back embedded? | |
1397 | */ | |
1398 | if (acl_phys.z_acl_extern_obj) { | |
3558fd73 | 1399 | error = dmu_object_free(zsb->z_os, |
428870ff BB |
1400 | acl_phys.z_acl_extern_obj, tx); |
1401 | if (error) | |
1402 | return (error); | |
1403 | acl_phys.z_acl_extern_obj = 0; | |
1404 | } | |
1405 | ||
1406 | for (aclnode = list_head(&aclp->z_acl); aclnode; | |
1407 | aclnode = list_next(&aclp->z_acl, aclnode)) { | |
1408 | if (aclnode->z_ace_count == 0) | |
1409 | continue; | |
1410 | bcopy(aclnode->z_acldata, start, | |
1411 | aclnode->z_size); | |
1412 | start = (caddr_t)start + aclnode->z_size; | |
1413 | } | |
34dc7c2f | 1414 | } |
34dc7c2f | 1415 | /* |
428870ff BB |
1416 | * If Old version then swap count/bytes to match old |
1417 | * layout of znode_acl_phys_t. | |
34dc7c2f | 1418 | */ |
428870ff BB |
1419 | if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) { |
1420 | acl_phys.z_acl_size = aclp->z_acl_count; | |
1421 | acl_phys.z_acl_count = aclp->z_acl_bytes; | |
1422 | } else { | |
1423 | acl_phys.z_acl_size = aclp->z_acl_bytes; | |
1424 | acl_phys.z_acl_count = aclp->z_acl_count; | |
34dc7c2f | 1425 | } |
428870ff | 1426 | acl_phys.z_acl_version = aclp->z_version; |
34dc7c2f | 1427 | |
3558fd73 | 1428 | SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ZNODE_ACL(zsb), NULL, |
428870ff | 1429 | &acl_phys, sizeof (acl_phys)); |
34dc7c2f BB |
1430 | } |
1431 | ||
34dc7c2f BB |
1432 | /* |
1433 | * Replace ACL wide bits, but first clear them. | |
1434 | */ | |
428870ff | 1435 | zp->z_pflags &= ~ZFS_ACL_WIDE_FLAGS; |
34dc7c2f | 1436 | |
428870ff | 1437 | zp->z_pflags |= aclp->z_hints; |
34dc7c2f BB |
1438 | |
1439 | if (ace_trivial_common(aclp, 0, zfs_ace_walk) == 0) | |
428870ff | 1440 | zp->z_pflags |= ZFS_ACL_TRIVIAL; |
34dc7c2f | 1441 | |
428870ff BB |
1442 | zfs_tstamp_update_setup(zp, STATE_CHANGED, NULL, ctime, B_TRUE); |
1443 | return (sa_bulk_update(zp->z_sa_hdl, bulk, count, tx)); | |
34dc7c2f BB |
1444 | } |
1445 | ||
34dc7c2f | 1446 | static void |
3558fd73 | 1447 | zfs_acl_chmod(zfs_sb_t *zsb, uint64_t mode, zfs_acl_t *aclp) |
34dc7c2f | 1448 | { |
428870ff | 1449 | void *acep = NULL; |
34dc7c2f | 1450 | uint64_t who; |
428870ff BB |
1451 | int new_count, new_bytes; |
1452 | int ace_size; | |
3558fd73 | 1453 | int entry_type; |
34dc7c2f BB |
1454 | uint16_t iflags, type; |
1455 | uint32_t access_mask; | |
428870ff | 1456 | zfs_acl_node_t *newnode; |
3558fd73 BB |
1457 | size_t abstract_size = aclp->z_ops.ace_abstract_size(); |
1458 | void *zacep; | |
1459 | uint32_t owner, group, everyone; | |
428870ff BB |
1460 | uint32_t deny1, deny2, allow0; |
1461 | ||
1462 | new_count = new_bytes = 0; | |
1463 | ||
1464 | acl_trivial_access_masks((mode_t)mode, &allow0, &deny1, &deny2, | |
1465 | &owner, &group, &everyone); | |
1466 | ||
1467 | newnode = zfs_acl_node_alloc((abstract_size * 6) + aclp->z_acl_bytes); | |
1468 | ||
1469 | zacep = newnode->z_acldata; | |
1470 | if (allow0) { | |
1471 | zfs_set_ace(aclp, zacep, allow0, ALLOW, -1, ACE_OWNER); | |
1472 | zacep = (void *)((uintptr_t)zacep + abstract_size); | |
1473 | new_count++; | |
1474 | new_bytes += abstract_size; | |
1475 | } if (deny1) { | |
1476 | zfs_set_ace(aclp, zacep, deny1, DENY, -1, ACE_OWNER); | |
1477 | zacep = (void *)((uintptr_t)zacep + abstract_size); | |
1478 | new_count++; | |
1479 | new_bytes += abstract_size; | |
1480 | } | |
1481 | if (deny2) { | |
1482 | zfs_set_ace(aclp, zacep, deny2, DENY, -1, OWNING_GROUP); | |
1483 | zacep = (void *)((uintptr_t)zacep + abstract_size); | |
1484 | new_count++; | |
1485 | new_bytes += abstract_size; | |
1486 | } | |
34dc7c2f | 1487 | |
149e873a BB |
1488 | while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask, |
1489 | &iflags, &type))) { | |
428870ff | 1490 | uint16_t inherit_flags; |
34dc7c2f BB |
1491 | |
1492 | entry_type = (iflags & ACE_TYPE_FLAGS); | |
428870ff BB |
1493 | inherit_flags = (iflags & ALL_INHERIT); |
1494 | ||
1495 | if ((entry_type == ACE_OWNER || entry_type == ACE_EVERYONE || | |
1496 | (entry_type == OWNING_GROUP)) && | |
1497 | ((inherit_flags & ACE_INHERIT_ONLY_ACE) == 0)) { | |
1498 | continue; | |
1499 | } | |
34dc7c2f BB |
1500 | |
1501 | if ((type != ALLOW && type != DENY) || | |
428870ff BB |
1502 | (inherit_flags & ACE_INHERIT_ONLY_ACE)) { |
1503 | if (inherit_flags) | |
34dc7c2f BB |
1504 | aclp->z_hints |= ZFS_INHERIT_ACE; |
1505 | switch (type) { | |
1506 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
1507 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
1508 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
1509 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
1510 | aclp->z_hints |= ZFS_ACL_OBJ_ACE; | |
1511 | break; | |
1512 | } | |
34dc7c2f | 1513 | } else { |
34dc7c2f | 1514 | |
428870ff BB |
1515 | /* |
1516 | * Limit permissions to be no greater than | |
1517 | * group permissions | |
1518 | */ | |
3558fd73 | 1519 | if (zsb->z_acl_inherit == ZFS_ACL_RESTRICTED) { |
428870ff BB |
1520 | if (!(mode & S_IRGRP)) |
1521 | access_mask &= ~ACE_READ_DATA; | |
1522 | if (!(mode & S_IWGRP)) | |
1523 | access_mask &= | |
1524 | ~(ACE_WRITE_DATA|ACE_APPEND_DATA); | |
1525 | if (!(mode & S_IXGRP)) | |
1526 | access_mask &= ~ACE_EXECUTE; | |
1527 | access_mask &= | |
1528 | ~(ACE_WRITE_OWNER|ACE_WRITE_ACL| | |
1529 | ACE_WRITE_ATTRIBUTES|ACE_WRITE_NAMED_ATTRS); | |
1530 | } | |
34dc7c2f | 1531 | } |
428870ff BB |
1532 | zfs_set_ace(aclp, zacep, access_mask, type, who, iflags); |
1533 | ace_size = aclp->z_ops.ace_size(acep); | |
1534 | zacep = (void *)((uintptr_t)zacep + ace_size); | |
1535 | new_count++; | |
1536 | new_bytes += ace_size; | |
1537 | } | |
1538 | zfs_set_ace(aclp, zacep, owner, 0, -1, ACE_OWNER); | |
1539 | zacep = (void *)((uintptr_t)zacep + abstract_size); | |
1540 | zfs_set_ace(aclp, zacep, group, 0, -1, OWNING_GROUP); | |
1541 | zacep = (void *)((uintptr_t)zacep + abstract_size); | |
1542 | zfs_set_ace(aclp, zacep, everyone, 0, -1, ACE_EVERYONE); | |
1543 | ||
1544 | new_count += 3; | |
1545 | new_bytes += abstract_size * 3; | |
1546 | zfs_acl_release_nodes(aclp); | |
1547 | aclp->z_acl_count = new_count; | |
1548 | aclp->z_acl_bytes = new_bytes; | |
1549 | newnode->z_ace_count = new_count; | |
1550 | newnode->z_size = new_bytes; | |
1551 | list_insert_tail(&aclp->z_acl, newnode); | |
34dc7c2f BB |
1552 | } |
1553 | ||
572e2857 | 1554 | void |
34dc7c2f BB |
1555 | zfs_acl_chmod_setattr(znode_t *zp, zfs_acl_t **aclp, uint64_t mode) |
1556 | { | |
34dc7c2f | 1557 | mutex_enter(&zp->z_acl_lock); |
572e2857 | 1558 | mutex_enter(&zp->z_lock); |
428870ff BB |
1559 | *aclp = zfs_acl_alloc(zfs_acl_version_zp(zp)); |
1560 | (*aclp)->z_hints = zp->z_pflags & V4_ACL_WIDE_FLAGS; | |
3558fd73 | 1561 | zfs_acl_chmod(ZTOZSB(zp), mode, *aclp); |
34dc7c2f | 1562 | mutex_exit(&zp->z_lock); |
572e2857 | 1563 | mutex_exit(&zp->z_acl_lock); |
428870ff | 1564 | ASSERT(*aclp); |
34dc7c2f BB |
1565 | } |
1566 | ||
1567 | /* | |
1568 | * strip off write_owner and write_acl | |
1569 | */ | |
1570 | static void | |
3558fd73 | 1571 | zfs_restricted_update(zfs_sb_t *zsb, zfs_acl_t *aclp, void *acep) |
34dc7c2f BB |
1572 | { |
1573 | uint32_t mask = aclp->z_ops.ace_mask_get(acep); | |
1574 | ||
3558fd73 | 1575 | if ((zsb->z_acl_inherit == ZFS_ACL_RESTRICTED) && |
34dc7c2f BB |
1576 | (aclp->z_ops.ace_type_get(acep) == ALLOW)) { |
1577 | mask &= ~RESTRICTED_CLEAR; | |
1578 | aclp->z_ops.ace_mask_set(acep, mask); | |
1579 | } | |
1580 | } | |
1581 | ||
1582 | /* | |
1583 | * Should ACE be inherited? | |
1584 | */ | |
1585 | static int | |
3558fd73 | 1586 | zfs_ace_can_use(umode_t obj_mode, uint16_t acep_flags) |
34dc7c2f | 1587 | { |
34dc7c2f BB |
1588 | int iflags = (acep_flags & 0xf); |
1589 | ||
3558fd73 | 1590 | if (S_ISDIR(obj_mode) && (iflags & ACE_DIRECTORY_INHERIT_ACE)) |
34dc7c2f BB |
1591 | return (1); |
1592 | else if (iflags & ACE_FILE_INHERIT_ACE) | |
3558fd73 | 1593 | return (!(S_ISDIR(obj_mode) && |
34dc7c2f BB |
1594 | (iflags & ACE_NO_PROPAGATE_INHERIT_ACE))); |
1595 | return (0); | |
1596 | } | |
1597 | ||
1598 | /* | |
1599 | * inherit inheritable ACEs from parent | |
1600 | */ | |
1601 | static zfs_acl_t * | |
3558fd73 | 1602 | zfs_acl_inherit(zfs_sb_t *zsb, umode_t obj_mode, zfs_acl_t *paclp, |
9babb374 | 1603 | uint64_t mode, boolean_t *need_chmod) |
34dc7c2f | 1604 | { |
34dc7c2f | 1605 | void *pacep; |
428870ff BB |
1606 | void *acep; |
1607 | zfs_acl_node_t *aclnode; | |
34dc7c2f BB |
1608 | zfs_acl_t *aclp = NULL; |
1609 | uint64_t who; | |
1610 | uint32_t access_mask; | |
1611 | uint16_t iflags, newflags, type; | |
1612 | size_t ace_size; | |
1613 | void *data1, *data2; | |
1614 | size_t data1sz, data2sz; | |
3558fd73 BB |
1615 | boolean_t vdir = S_ISDIR(obj_mode); |
1616 | boolean_t vreg = S_ISREG(obj_mode); | |
b128c09f BB |
1617 | boolean_t passthrough, passthrough_x, noallow; |
1618 | ||
1619 | passthrough_x = | |
3558fd73 | 1620 | zsb->z_acl_inherit == ZFS_ACL_PASSTHROUGH_X; |
b128c09f | 1621 | passthrough = passthrough_x || |
3558fd73 | 1622 | zsb->z_acl_inherit == ZFS_ACL_PASSTHROUGH; |
b128c09f | 1623 | noallow = |
3558fd73 | 1624 | zsb->z_acl_inherit == ZFS_ACL_NOALLOW; |
34dc7c2f BB |
1625 | |
1626 | *need_chmod = B_TRUE; | |
1627 | pacep = NULL; | |
b128c09f | 1628 | aclp = zfs_acl_alloc(paclp->z_version); |
3558fd73 | 1629 | if (zsb->z_acl_inherit == ZFS_ACL_DISCARD || S_ISLNK(obj_mode)) |
b128c09f | 1630 | return (aclp); |
149e873a BB |
1631 | while ((pacep = zfs_acl_next_ace(paclp, pacep, &who, |
1632 | &access_mask, &iflags, &type))) { | |
34dc7c2f | 1633 | |
b128c09f BB |
1634 | /* |
1635 | * don't inherit bogus ACEs | |
1636 | */ | |
1637 | if (!zfs_acl_valid_ace_type(type, iflags)) | |
1638 | continue; | |
34dc7c2f | 1639 | |
b128c09f BB |
1640 | if (noallow && type == ALLOW) |
1641 | continue; | |
34dc7c2f | 1642 | |
b128c09f | 1643 | ace_size = aclp->z_ops.ace_size(pacep); |
34dc7c2f | 1644 | |
3558fd73 | 1645 | if (!zfs_ace_can_use(obj_mode, iflags)) |
b128c09f BB |
1646 | continue; |
1647 | ||
1648 | /* | |
1649 | * If owner@, group@, or everyone@ inheritable | |
1650 | * then zfs_acl_chmod() isn't needed. | |
1651 | */ | |
1652 | if (passthrough && | |
1653 | ((iflags & (ACE_OWNER|ACE_EVERYONE)) || | |
1654 | ((iflags & OWNING_GROUP) == | |
1655 | OWNING_GROUP)) && (vreg || (vdir && (iflags & | |
1656 | ACE_DIRECTORY_INHERIT_ACE)))) { | |
1657 | *need_chmod = B_FALSE; | |
428870ff | 1658 | } |
b128c09f | 1659 | |
428870ff BB |
1660 | if (!vdir && passthrough_x && |
1661 | ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == 0)) { | |
1662 | access_mask &= ~ACE_EXECUTE; | |
b128c09f BB |
1663 | } |
1664 | ||
1665 | aclnode = zfs_acl_node_alloc(ace_size); | |
1666 | list_insert_tail(&aclp->z_acl, aclnode); | |
1667 | acep = aclnode->z_acldata; | |
1668 | ||
1669 | zfs_set_ace(aclp, acep, access_mask, type, | |
1670 | who, iflags|ACE_INHERITED_ACE); | |
1671 | ||
1672 | /* | |
1673 | * Copy special opaque data if any | |
1674 | */ | |
1675 | if ((data1sz = paclp->z_ops.ace_data(pacep, &data1)) != 0) { | |
1676 | VERIFY((data2sz = aclp->z_ops.ace_data(acep, | |
1677 | &data2)) == data1sz); | |
1678 | bcopy(data1, data2, data2sz); | |
1679 | } | |
428870ff | 1680 | |
b128c09f BB |
1681 | aclp->z_acl_count++; |
1682 | aclnode->z_ace_count++; | |
1683 | aclp->z_acl_bytes += aclnode->z_size; | |
1684 | newflags = aclp->z_ops.ace_flags_get(acep); | |
1685 | ||
1686 | if (vdir) | |
1687 | aclp->z_hints |= ZFS_INHERIT_ACE; | |
1688 | ||
1689 | if ((iflags & ACE_NO_PROPAGATE_INHERIT_ACE) || !vdir) { | |
1690 | newflags &= ~ALL_INHERIT; | |
1691 | aclp->z_ops.ace_flags_set(acep, | |
1692 | newflags|ACE_INHERITED_ACE); | |
3558fd73 | 1693 | zfs_restricted_update(zsb, aclp, acep); |
b128c09f BB |
1694 | continue; |
1695 | } | |
1696 | ||
1697 | ASSERT(vdir); | |
1698 | ||
428870ff BB |
1699 | /* |
1700 | * If only FILE_INHERIT is set then turn on | |
1701 | * inherit_only | |
1702 | */ | |
b128c09f | 1703 | if ((iflags & (ACE_FILE_INHERIT_ACE | |
428870ff | 1704 | ACE_DIRECTORY_INHERIT_ACE)) == ACE_FILE_INHERIT_ACE) { |
b128c09f | 1705 | newflags |= ACE_INHERIT_ONLY_ACE; |
428870ff | 1706 | aclp->z_ops.ace_flags_set(acep, |
b128c09f | 1707 | newflags|ACE_INHERITED_ACE); |
b128c09f | 1708 | } else { |
428870ff | 1709 | newflags &= ~ACE_INHERIT_ONLY_ACE; |
b128c09f BB |
1710 | aclp->z_ops.ace_flags_set(acep, |
1711 | newflags|ACE_INHERITED_ACE); | |
34dc7c2f BB |
1712 | } |
1713 | } | |
1714 | return (aclp); | |
1715 | } | |
1716 | ||
1717 | /* | |
1718 | * Create file system object initial permissions | |
1719 | * including inheritable ACEs. | |
1720 | */ | |
9babb374 BB |
1721 | int |
1722 | zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr, | |
1723 | vsecattr_t *vsecp, zfs_acl_ids_t *acl_ids) | |
34dc7c2f | 1724 | { |
34dc7c2f | 1725 | int error; |
3558fd73 | 1726 | zfs_sb_t *zsb = ZTOZSB(dzp); |
34dc7c2f | 1727 | zfs_acl_t *paclp; |
a405c8a6 | 1728 | #ifdef HAVE_KSID |
34dc7c2f | 1729 | gid_t gid; |
a405c8a6 | 1730 | #endif /* HAVE_KSID */ |
34dc7c2f | 1731 | boolean_t need_chmod = B_TRUE; |
428870ff | 1732 | boolean_t inherited = B_FALSE; |
34dc7c2f | 1733 | |
9babb374 | 1734 | bzero(acl_ids, sizeof (zfs_acl_ids_t)); |
3558fd73 | 1735 | acl_ids->z_mode = vap->va_mode; |
34dc7c2f | 1736 | |
9babb374 | 1737 | if (vsecp) |
3558fd73 BB |
1738 | if ((error = zfs_vsec_2_aclp(zsb, vap->va_mode, vsecp, |
1739 | cr, &acl_ids->z_fuidp, &acl_ids->z_aclp)) != 0) | |
9babb374 | 1740 | return (error); |
a405c8a6 BB |
1741 | |
1742 | acl_ids->z_fuid = vap->va_uid; | |
1743 | acl_ids->z_fgid = vap->va_gid; | |
1744 | #ifdef HAVE_KSID | |
34dc7c2f BB |
1745 | /* |
1746 | * Determine uid and gid. | |
1747 | */ | |
3558fd73 BB |
1748 | if ((flag & IS_ROOT_NODE) || zsb->z_replay || |
1749 | ((flag & IS_XATTR) && (S_ISDIR(vap->va_mode)))) { | |
1750 | acl_ids->z_fuid = zfs_fuid_create(zsb, (uint64_t)vap->va_uid, | |
1751 | cr, ZFS_OWNER, &acl_ids->z_fuidp); | |
1752 | acl_ids->z_fgid = zfs_fuid_create(zsb, (uint64_t)vap->va_gid, | |
1753 | cr, ZFS_GROUP, &acl_ids->z_fuidp); | |
34dc7c2f BB |
1754 | gid = vap->va_gid; |
1755 | } else { | |
3558fd73 | 1756 | acl_ids->z_fuid = zfs_fuid_create_cred(zsb, ZFS_OWNER, |
9babb374 BB |
1757 | cr, &acl_ids->z_fuidp); |
1758 | acl_ids->z_fgid = 0; | |
34dc7c2f | 1759 | if (vap->va_mask & AT_GID) { |
3558fd73 | 1760 | acl_ids->z_fgid = zfs_fuid_create(zsb, |
9babb374 BB |
1761 | (uint64_t)vap->va_gid, |
1762 | cr, ZFS_GROUP, &acl_ids->z_fuidp); | |
34dc7c2f | 1763 | gid = vap->va_gid; |
572e2857 | 1764 | if (acl_ids->z_fgid != dzp->z_gid && |
34dc7c2f BB |
1765 | !groupmember(vap->va_gid, cr) && |
1766 | secpolicy_vnode_create_gid(cr) != 0) | |
9babb374 | 1767 | acl_ids->z_fgid = 0; |
34dc7c2f | 1768 | } |
9babb374 | 1769 | if (acl_ids->z_fgid == 0) { |
428870ff BB |
1770 | if (dzp->z_mode & S_ISGID) { |
1771 | char *domain; | |
1772 | uint32_t rid; | |
1773 | ||
572e2857 | 1774 | acl_ids->z_fgid = dzp->z_gid; |
3558fd73 | 1775 | gid = zfs_fuid_map_id(zsb, acl_ids->z_fgid, |
34dc7c2f | 1776 | cr, ZFS_GROUP); |
428870ff | 1777 | |
3558fd73 | 1778 | if (zsb->z_use_fuids && |
428870ff BB |
1779 | IS_EPHEMERAL(acl_ids->z_fgid)) { |
1780 | domain = zfs_fuid_idx_domain( | |
3558fd73 | 1781 | &zsb->z_fuid_idx, |
428870ff BB |
1782 | FUID_INDEX(acl_ids->z_fgid)); |
1783 | rid = FUID_RID(acl_ids->z_fgid); | |
1784 | zfs_fuid_node_add(&acl_ids->z_fuidp, | |
1785 | domain, rid, | |
1786 | FUID_INDEX(acl_ids->z_fgid), | |
1787 | acl_ids->z_fgid, ZFS_GROUP); | |
1788 | } | |
34dc7c2f | 1789 | } else { |
3558fd73 | 1790 | acl_ids->z_fgid = zfs_fuid_create_cred(zsb, |
9babb374 | 1791 | ZFS_GROUP, cr, &acl_ids->z_fuidp); |
34dc7c2f BB |
1792 | gid = crgetgid(cr); |
1793 | } | |
1794 | } | |
1795 | } | |
a405c8a6 | 1796 | #endif /* HAVE_KSID */ |
34dc7c2f BB |
1797 | |
1798 | /* | |
1799 | * If we're creating a directory, and the parent directory has the | |
1800 | * set-GID bit set, set in on the new directory. | |
1801 | * Otherwise, if the user is neither privileged nor a member of the | |
1802 | * file's new group, clear the file's set-GID bit. | |
1803 | */ | |
1804 | ||
428870ff | 1805 | if (!(flag & IS_ROOT_NODE) && (dzp->z_mode & S_ISGID) && |
3558fd73 | 1806 | (S_ISDIR(vap->va_mode))) { |
9babb374 | 1807 | acl_ids->z_mode |= S_ISGID; |
34dc7c2f | 1808 | } else { |
9babb374 | 1809 | if ((acl_ids->z_mode & S_ISGID) && |
34dc7c2f | 1810 | secpolicy_vnode_setids_setgids(cr, gid) != 0) |
9babb374 | 1811 | acl_ids->z_mode &= ~S_ISGID; |
34dc7c2f BB |
1812 | } |
1813 | ||
9babb374 | 1814 | if (acl_ids->z_aclp == NULL) { |
572e2857 | 1815 | mutex_enter(&dzp->z_acl_lock); |
9babb374 | 1816 | mutex_enter(&dzp->z_lock); |
3558fd73 | 1817 | if (!(flag & IS_ROOT_NODE) && (S_ISDIR(ZTOI(dzp)->i_mode) && |
428870ff BB |
1818 | (dzp->z_pflags & ZFS_INHERIT_ACE)) && |
1819 | !(dzp->z_pflags & ZFS_XATTR)) { | |
572e2857 BB |
1820 | VERIFY(0 == zfs_acl_node_read(dzp, B_TRUE, |
1821 | &paclp, B_FALSE)); | |
3558fd73 BB |
1822 | acl_ids->z_aclp = zfs_acl_inherit(zsb, |
1823 | vap->va_mode, paclp, acl_ids->z_mode, &need_chmod); | |
428870ff | 1824 | inherited = B_TRUE; |
34dc7c2f | 1825 | } else { |
9babb374 BB |
1826 | acl_ids->z_aclp = |
1827 | zfs_acl_alloc(zfs_acl_version_zp(dzp)); | |
428870ff | 1828 | acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL; |
9babb374 BB |
1829 | } |
1830 | mutex_exit(&dzp->z_lock); | |
572e2857 | 1831 | mutex_exit(&dzp->z_acl_lock); |
9babb374 | 1832 | if (need_chmod) { |
3558fd73 | 1833 | acl_ids->z_aclp->z_hints |= S_ISDIR(vap->va_mode) ? |
9babb374 | 1834 | ZFS_ACL_AUTO_INHERIT : 0; |
3558fd73 | 1835 | zfs_acl_chmod(zsb, acl_ids->z_mode, acl_ids->z_aclp); |
34dc7c2f | 1836 | } |
34dc7c2f BB |
1837 | } |
1838 | ||
428870ff BB |
1839 | if (inherited || vsecp) { |
1840 | acl_ids->z_mode = zfs_mode_compute(acl_ids->z_mode, | |
1841 | acl_ids->z_aclp, &acl_ids->z_aclp->z_hints, | |
1842 | acl_ids->z_fuid, acl_ids->z_fgid); | |
1843 | if (ace_trivial_common(acl_ids->z_aclp, 0, zfs_ace_walk) == 0) | |
1844 | acl_ids->z_aclp->z_hints |= ZFS_ACL_TRIVIAL; | |
1845 | } | |
1846 | ||
9babb374 BB |
1847 | return (0); |
1848 | } | |
34dc7c2f | 1849 | |
9babb374 BB |
1850 | /* |
1851 | * Free ACL and fuid_infop, but not the acl_ids structure | |
1852 | */ | |
1853 | void | |
1854 | zfs_acl_ids_free(zfs_acl_ids_t *acl_ids) | |
1855 | { | |
1856 | if (acl_ids->z_aclp) | |
1857 | zfs_acl_free(acl_ids->z_aclp); | |
1858 | if (acl_ids->z_fuidp) | |
1859 | zfs_fuid_info_free(acl_ids->z_fuidp); | |
1860 | acl_ids->z_aclp = NULL; | |
1861 | acl_ids->z_fuidp = NULL; | |
1862 | } | |
34dc7c2f | 1863 | |
9babb374 | 1864 | boolean_t |
3558fd73 | 1865 | zfs_acl_ids_overquota(zfs_sb_t *zsb, zfs_acl_ids_t *acl_ids) |
9babb374 | 1866 | { |
3558fd73 BB |
1867 | return (zfs_fuid_overquota(zsb, B_FALSE, acl_ids->z_fuid) || |
1868 | zfs_fuid_overquota(zsb, B_TRUE, acl_ids->z_fgid)); | |
34dc7c2f BB |
1869 | } |
1870 | ||
1871 | /* | |
1872 | * Retrieve a files ACL | |
1873 | */ | |
1874 | int | |
1875 | zfs_getacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr) | |
1876 | { | |
1877 | zfs_acl_t *aclp; | |
1878 | ulong_t mask; | |
1879 | int error; | |
1880 | int count = 0; | |
1881 | int largeace = 0; | |
1882 | ||
1883 | mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT | | |
1884 | VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES); | |
1885 | ||
34dc7c2f BB |
1886 | if (mask == 0) |
1887 | return (ENOSYS); | |
1888 | ||
149e873a | 1889 | if ((error = zfs_zaccess(zp, ACE_READ_ACL, 0, skipaclchk, cr))) |
428870ff BB |
1890 | return (error); |
1891 | ||
34dc7c2f BB |
1892 | mutex_enter(&zp->z_acl_lock); |
1893 | ||
572e2857 | 1894 | error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE); |
34dc7c2f BB |
1895 | if (error != 0) { |
1896 | mutex_exit(&zp->z_acl_lock); | |
1897 | return (error); | |
1898 | } | |
1899 | ||
1900 | /* | |
1901 | * Scan ACL to determine number of ACEs | |
1902 | */ | |
428870ff | 1903 | if ((zp->z_pflags & ZFS_ACL_OBJ_ACE) && !(mask & VSA_ACE_ALLTYPES)) { |
34dc7c2f BB |
1904 | void *zacep = NULL; |
1905 | uint64_t who; | |
1906 | uint32_t access_mask; | |
1907 | uint16_t type, iflags; | |
1908 | ||
149e873a BB |
1909 | while ((zacep = zfs_acl_next_ace(aclp, zacep, |
1910 | &who, &access_mask, &iflags, &type))) { | |
34dc7c2f BB |
1911 | switch (type) { |
1912 | case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: | |
1913 | case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: | |
1914 | case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: | |
1915 | case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: | |
1916 | largeace++; | |
1917 | continue; | |
1918 | default: | |
1919 | count++; | |
1920 | } | |
1921 | } | |
1922 | vsecp->vsa_aclcnt = count; | |
1923 | } else | |
428870ff | 1924 | count = (int)aclp->z_acl_count; |
34dc7c2f BB |
1925 | |
1926 | if (mask & VSA_ACECNT) { | |
1927 | vsecp->vsa_aclcnt = count; | |
1928 | } | |
1929 | ||
1930 | if (mask & VSA_ACE) { | |
1931 | size_t aclsz; | |
1932 | ||
34dc7c2f BB |
1933 | aclsz = count * sizeof (ace_t) + |
1934 | sizeof (ace_object_t) * largeace; | |
1935 | ||
1936 | vsecp->vsa_aclentp = kmem_alloc(aclsz, KM_SLEEP); | |
1937 | vsecp->vsa_aclentsz = aclsz; | |
1938 | ||
1939 | if (aclp->z_version == ZFS_ACL_VERSION_FUID) | |
3558fd73 | 1940 | zfs_copy_fuid_2_ace(ZTOZSB(zp), aclp, cr, |
34dc7c2f BB |
1941 | vsecp->vsa_aclentp, !(mask & VSA_ACE_ALLTYPES)); |
1942 | else { | |
428870ff BB |
1943 | zfs_acl_node_t *aclnode; |
1944 | void *start = vsecp->vsa_aclentp; | |
1945 | ||
1946 | for (aclnode = list_head(&aclp->z_acl); aclnode; | |
1947 | aclnode = list_next(&aclp->z_acl, aclnode)) { | |
1948 | bcopy(aclnode->z_acldata, start, | |
1949 | aclnode->z_size); | |
1950 | start = (caddr_t)start + aclnode->z_size; | |
1951 | } | |
1952 | ASSERT((caddr_t)start - (caddr_t)vsecp->vsa_aclentp == | |
1953 | aclp->z_acl_bytes); | |
34dc7c2f BB |
1954 | } |
1955 | } | |
1956 | if (mask & VSA_ACE_ACLFLAGS) { | |
1957 | vsecp->vsa_aclflags = 0; | |
428870ff | 1958 | if (zp->z_pflags & ZFS_ACL_DEFAULTED) |
34dc7c2f | 1959 | vsecp->vsa_aclflags |= ACL_DEFAULTED; |
428870ff | 1960 | if (zp->z_pflags & ZFS_ACL_PROTECTED) |
34dc7c2f | 1961 | vsecp->vsa_aclflags |= ACL_PROTECTED; |
428870ff | 1962 | if (zp->z_pflags & ZFS_ACL_AUTO_INHERIT) |
34dc7c2f BB |
1963 | vsecp->vsa_aclflags |= ACL_AUTO_INHERIT; |
1964 | } | |
1965 | ||
1966 | mutex_exit(&zp->z_acl_lock); | |
1967 | ||
34dc7c2f BB |
1968 | return (0); |
1969 | } | |
1970 | ||
1971 | int | |
3558fd73 | 1972 | zfs_vsec_2_aclp(zfs_sb_t *zsb, umode_t obj_mode, |
9babb374 | 1973 | vsecattr_t *vsecp, cred_t *cr, zfs_fuid_info_t **fuidp, zfs_acl_t **zaclp) |
34dc7c2f BB |
1974 | { |
1975 | zfs_acl_t *aclp; | |
1976 | zfs_acl_node_t *aclnode; | |
1977 | int aclcnt = vsecp->vsa_aclcnt; | |
1978 | int error; | |
1979 | ||
1980 | if (vsecp->vsa_aclcnt > MAX_ACL_ENTRIES || vsecp->vsa_aclcnt <= 0) | |
1981 | return (EINVAL); | |
1982 | ||
3558fd73 | 1983 | aclp = zfs_acl_alloc(zfs_acl_version(zsb->z_version)); |
34dc7c2f BB |
1984 | |
1985 | aclp->z_hints = 0; | |
1986 | aclnode = zfs_acl_node_alloc(aclcnt * sizeof (zfs_object_ace_t)); | |
1987 | if (aclp->z_version == ZFS_ACL_VERSION_INITIAL) { | |
3558fd73 | 1988 | if ((error = zfs_copy_ace_2_oldace(obj_mode, aclp, |
34dc7c2f BB |
1989 | (ace_t *)vsecp->vsa_aclentp, aclnode->z_acldata, |
1990 | aclcnt, &aclnode->z_size)) != 0) { | |
1991 | zfs_acl_free(aclp); | |
1992 | zfs_acl_node_free(aclnode); | |
1993 | return (error); | |
1994 | } | |
1995 | } else { | |
3558fd73 | 1996 | if ((error = zfs_copy_ace_2_fuid(zsb, obj_mode, aclp, |
34dc7c2f | 1997 | vsecp->vsa_aclentp, aclnode->z_acldata, aclcnt, |
9babb374 | 1998 | &aclnode->z_size, fuidp, cr)) != 0) { |
34dc7c2f BB |
1999 | zfs_acl_free(aclp); |
2000 | zfs_acl_node_free(aclnode); | |
2001 | return (error); | |
2002 | } | |
2003 | } | |
2004 | aclp->z_acl_bytes = aclnode->z_size; | |
2005 | aclnode->z_ace_count = aclcnt; | |
2006 | aclp->z_acl_count = aclcnt; | |
2007 | list_insert_head(&aclp->z_acl, aclnode); | |
2008 | ||
2009 | /* | |
2010 | * If flags are being set then add them to z_hints | |
2011 | */ | |
2012 | if (vsecp->vsa_mask & VSA_ACE_ACLFLAGS) { | |
2013 | if (vsecp->vsa_aclflags & ACL_PROTECTED) | |
2014 | aclp->z_hints |= ZFS_ACL_PROTECTED; | |
2015 | if (vsecp->vsa_aclflags & ACL_DEFAULTED) | |
2016 | aclp->z_hints |= ZFS_ACL_DEFAULTED; | |
2017 | if (vsecp->vsa_aclflags & ACL_AUTO_INHERIT) | |
2018 | aclp->z_hints |= ZFS_ACL_AUTO_INHERIT; | |
2019 | } | |
2020 | ||
2021 | *zaclp = aclp; | |
2022 | ||
2023 | return (0); | |
2024 | } | |
2025 | ||
2026 | /* | |
2027 | * Set a files ACL | |
2028 | */ | |
2029 | int | |
2030 | zfs_setacl(znode_t *zp, vsecattr_t *vsecp, boolean_t skipaclchk, cred_t *cr) | |
2031 | { | |
3558fd73 BB |
2032 | zfs_sb_t *zsb = ZTOZSB(zp); |
2033 | zilog_t *zilog = zsb->z_log; | |
34dc7c2f BB |
2034 | ulong_t mask = vsecp->vsa_mask & (VSA_ACE | VSA_ACECNT); |
2035 | dmu_tx_t *tx; | |
2036 | int error; | |
2037 | zfs_acl_t *aclp; | |
2038 | zfs_fuid_info_t *fuidp = NULL; | |
9babb374 | 2039 | boolean_t fuid_dirtied; |
572e2857 | 2040 | uint64_t acl_obj; |
34dc7c2f BB |
2041 | |
2042 | if (mask == 0) | |
2043 | return (ENOSYS); | |
2044 | ||
428870ff | 2045 | if (zp->z_pflags & ZFS_IMMUTABLE) |
34dc7c2f BB |
2046 | return (EPERM); |
2047 | ||
149e873a | 2048 | if ((error = zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr))) |
34dc7c2f BB |
2049 | return (error); |
2050 | ||
3558fd73 | 2051 | error = zfs_vsec_2_aclp(zsb, ZTOI(zp)->i_mode, vsecp, cr, &fuidp, |
9babb374 | 2052 | &aclp); |
34dc7c2f BB |
2053 | if (error) |
2054 | return (error); | |
2055 | ||
2056 | /* | |
2057 | * If ACL wide flags aren't being set then preserve any | |
2058 | * existing flags. | |
2059 | */ | |
2060 | if (!(vsecp->vsa_mask & VSA_ACE_ACLFLAGS)) { | |
428870ff BB |
2061 | aclp->z_hints |= |
2062 | (zp->z_pflags & V4_ACL_WIDE_FLAGS); | |
34dc7c2f BB |
2063 | } |
2064 | top: | |
34dc7c2f | 2065 | mutex_enter(&zp->z_acl_lock); |
572e2857 | 2066 | mutex_enter(&zp->z_lock); |
34dc7c2f | 2067 | |
3558fd73 | 2068 | tx = dmu_tx_create(zsb->z_os); |
428870ff BB |
2069 | |
2070 | dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); | |
2071 | ||
3558fd73 | 2072 | fuid_dirtied = zsb->z_fuid_dirty; |
428870ff | 2073 | if (fuid_dirtied) |
3558fd73 | 2074 | zfs_fuid_txhold(zsb, tx); |
428870ff BB |
2075 | |
2076 | /* | |
2077 | * If old version and ACL won't fit in bonus and we aren't | |
2078 | * upgrading then take out necessary DMU holds | |
2079 | */ | |
2080 | ||
572e2857 | 2081 | if ((acl_obj = zfs_external_acl(zp)) != 0) { |
3558fd73 | 2082 | if (zsb->z_version >= ZPL_VERSION_FUID && |
572e2857 BB |
2083 | zfs_znode_acl_version(zp) <= ZFS_ACL_VERSION_INITIAL) { |
2084 | dmu_tx_hold_free(tx, acl_obj, 0, | |
428870ff | 2085 | DMU_OBJECT_END); |
572e2857 BB |
2086 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, |
2087 | aclp->z_acl_bytes); | |
34dc7c2f | 2088 | } else { |
572e2857 | 2089 | dmu_tx_hold_write(tx, acl_obj, 0, aclp->z_acl_bytes); |
34dc7c2f | 2090 | } |
428870ff | 2091 | } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) { |
34dc7c2f BB |
2092 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, aclp->z_acl_bytes); |
2093 | } | |
34dc7c2f | 2094 | |
428870ff | 2095 | zfs_sa_upgrade_txholds(tx, zp); |
fb5f0bc8 | 2096 | error = dmu_tx_assign(tx, TXG_NOWAIT); |
34dc7c2f BB |
2097 | if (error) { |
2098 | mutex_exit(&zp->z_acl_lock); | |
2099 | mutex_exit(&zp->z_lock); | |
2100 | ||
fb5f0bc8 | 2101 | if (error == ERESTART) { |
34dc7c2f BB |
2102 | dmu_tx_wait(tx); |
2103 | dmu_tx_abort(tx); | |
2104 | goto top; | |
2105 | } | |
2106 | dmu_tx_abort(tx); | |
2107 | zfs_acl_free(aclp); | |
2108 | return (error); | |
2109 | } | |
2110 | ||
9babb374 | 2111 | error = zfs_aclset_common(zp, aclp, cr, tx); |
34dc7c2f | 2112 | ASSERT(error == 0); |
572e2857 | 2113 | ASSERT(zp->z_acl_cached == NULL); |
45d1cae3 | 2114 | zp->z_acl_cached = aclp; |
34dc7c2f | 2115 | |
9babb374 | 2116 | if (fuid_dirtied) |
3558fd73 | 2117 | zfs_fuid_sync(zsb, tx); |
9babb374 | 2118 | |
34dc7c2f BB |
2119 | zfs_log_acl(zilog, tx, zp, vsecp, fuidp); |
2120 | ||
2121 | if (fuidp) | |
2122 | zfs_fuid_info_free(fuidp); | |
34dc7c2f | 2123 | dmu_tx_commit(tx); |
c60bc1fb | 2124 | |
34dc7c2f | 2125 | mutex_exit(&zp->z_lock); |
572e2857 | 2126 | mutex_exit(&zp->z_acl_lock); |
34dc7c2f BB |
2127 | |
2128 | return (error); | |
2129 | } | |
2130 | ||
2131 | /* | |
9babb374 BB |
2132 | * Check accesses of interest (AoI) against attributes of the dataset |
2133 | * such as read-only. Returns zero if no AoI conflict with dataset | |
2134 | * attributes, otherwise an appropriate errno is returned. | |
34dc7c2f BB |
2135 | */ |
2136 | static int | |
9babb374 | 2137 | zfs_zaccess_dataset_check(znode_t *zp, uint32_t v4_mode) |
34dc7c2f | 2138 | { |
2cf7f52b | 2139 | if ((v4_mode & WRITE_MASK) && (zfs_is_readonly(ZTOZSB(zp))) && |
3558fd73 BB |
2140 | (!S_ISDEV(ZTOI(zp)->i_mode) || |
2141 | (S_ISDEV(ZTOI(zp)->i_mode) && (v4_mode & WRITE_MASK_ATTRS)))) { | |
34dc7c2f BB |
2142 | return (EROFS); |
2143 | } | |
2144 | ||
2145 | /* | |
2146 | * Only check for READONLY on non-directories. | |
2147 | */ | |
2148 | if ((v4_mode & WRITE_MASK_DATA) && | |
3558fd73 | 2149 | ((!S_ISDIR(ZTOI(zp)->i_mode) && |
428870ff | 2150 | (zp->z_pflags & (ZFS_READONLY | ZFS_IMMUTABLE))) || |
3558fd73 | 2151 | (S_ISDIR(ZTOI(zp)->i_mode) && |
428870ff | 2152 | (zp->z_pflags & ZFS_IMMUTABLE)))) { |
34dc7c2f BB |
2153 | return (EPERM); |
2154 | } | |
2155 | ||
2156 | if ((v4_mode & (ACE_DELETE | ACE_DELETE_CHILD)) && | |
428870ff | 2157 | (zp->z_pflags & ZFS_NOUNLINK)) { |
34dc7c2f BB |
2158 | return (EPERM); |
2159 | } | |
2160 | ||
2161 | if (((v4_mode & (ACE_READ_DATA|ACE_EXECUTE)) && | |
428870ff | 2162 | (zp->z_pflags & ZFS_AV_QUARANTINED))) { |
34dc7c2f BB |
2163 | return (EACCES); |
2164 | } | |
2165 | ||
9babb374 BB |
2166 | return (0); |
2167 | } | |
2168 | ||
2169 | /* | |
2170 | * The primary usage of this function is to loop through all of the | |
2171 | * ACEs in the znode, determining what accesses of interest (AoI) to | |
2172 | * the caller are allowed or denied. The AoI are expressed as bits in | |
2173 | * the working_mode parameter. As each ACE is processed, bits covered | |
2174 | * by that ACE are removed from the working_mode. This removal | |
2175 | * facilitates two things. The first is that when the working mode is | |
2176 | * empty (= 0), we know we've looked at all the AoI. The second is | |
2177 | * that the ACE interpretation rules don't allow a later ACE to undo | |
2178 | * something granted or denied by an earlier ACE. Removing the | |
2179 | * discovered access or denial enforces this rule. At the end of | |
2180 | * processing the ACEs, all AoI that were found to be denied are | |
2181 | * placed into the working_mode, giving the caller a mask of denied | |
2182 | * accesses. Returns: | |
2183 | * 0 if all AoI granted | |
2184 | * EACCESS if the denied mask is non-zero | |
2185 | * other error if abnormal failure (e.g., IO error) | |
2186 | * | |
2187 | * A secondary usage of the function is to determine if any of the | |
2188 | * AoI are granted. If an ACE grants any access in | |
2189 | * the working_mode, we immediately short circuit out of the function. | |
2190 | * This mode is chosen by setting anyaccess to B_TRUE. The | |
2191 | * working_mode is not a denied access mask upon exit if the function | |
2192 | * is used in this manner. | |
2193 | */ | |
2194 | static int | |
2195 | zfs_zaccess_aces_check(znode_t *zp, uint32_t *working_mode, | |
2196 | boolean_t anyaccess, cred_t *cr) | |
2197 | { | |
3558fd73 | 2198 | zfs_sb_t *zsb = ZTOZSB(zp); |
9babb374 BB |
2199 | zfs_acl_t *aclp; |
2200 | int error; | |
2201 | uid_t uid = crgetuid(cr); | |
3558fd73 | 2202 | uint64_t who; |
9babb374 BB |
2203 | uint16_t type, iflags; |
2204 | uint16_t entry_type; | |
2205 | uint32_t access_mask; | |
2206 | uint32_t deny_mask = 0; | |
2207 | zfs_ace_hdr_t *acep = NULL; | |
2208 | boolean_t checkit; | |
572e2857 BB |
2209 | uid_t gowner; |
2210 | uid_t fowner; | |
2211 | ||
2212 | zfs_fuid_map_ids(zp, cr, &fowner, &gowner); | |
34dc7c2f BB |
2213 | |
2214 | mutex_enter(&zp->z_acl_lock); | |
2215 | ||
572e2857 | 2216 | error = zfs_acl_node_read(zp, B_FALSE, &aclp, B_FALSE); |
34dc7c2f BB |
2217 | if (error != 0) { |
2218 | mutex_exit(&zp->z_acl_lock); | |
2219 | return (error); | |
2220 | } | |
2221 | ||
428870ff BB |
2222 | ASSERT(zp->z_acl_cached); |
2223 | ||
149e873a BB |
2224 | while ((acep = zfs_acl_next_ace(aclp, acep, &who, &access_mask, |
2225 | &iflags, &type))) { | |
9babb374 | 2226 | uint32_t mask_matched; |
34dc7c2f | 2227 | |
b128c09f BB |
2228 | if (!zfs_acl_valid_ace_type(type, iflags)) |
2229 | continue; | |
2230 | ||
3558fd73 BB |
2231 | if (S_ISDIR(ZTOI(zp)->i_mode) && |
2232 | (iflags & ACE_INHERIT_ONLY_ACE)) | |
34dc7c2f BB |
2233 | continue; |
2234 | ||
9babb374 BB |
2235 | /* Skip ACE if it does not affect any AoI */ |
2236 | mask_matched = (access_mask & *working_mode); | |
2237 | if (!mask_matched) | |
2238 | continue; | |
2239 | ||
34dc7c2f BB |
2240 | entry_type = (iflags & ACE_TYPE_FLAGS); |
2241 | ||
2242 | checkit = B_FALSE; | |
2243 | ||
2244 | switch (entry_type) { | |
2245 | case ACE_OWNER: | |
572e2857 | 2246 | if (uid == fowner) |
34dc7c2f BB |
2247 | checkit = B_TRUE; |
2248 | break; | |
2249 | case OWNING_GROUP: | |
2250 | who = gowner; | |
2251 | /*FALLTHROUGH*/ | |
2252 | case ACE_IDENTIFIER_GROUP: | |
3558fd73 | 2253 | checkit = zfs_groupmember(zsb, who, cr); |
34dc7c2f BB |
2254 | break; |
2255 | case ACE_EVERYONE: | |
2256 | checkit = B_TRUE; | |
2257 | break; | |
2258 | ||
2259 | /* USER Entry */ | |
2260 | default: | |
2261 | if (entry_type == 0) { | |
2262 | uid_t newid; | |
2263 | ||
3558fd73 | 2264 | newid = zfs_fuid_map_id(zsb, who, cr, |
34dc7c2f BB |
2265 | ZFS_ACE_USER); |
2266 | if (newid != IDMAP_WK_CREATOR_OWNER_UID && | |
2267 | uid == newid) | |
2268 | checkit = B_TRUE; | |
2269 | break; | |
2270 | } else { | |
34dc7c2f BB |
2271 | mutex_exit(&zp->z_acl_lock); |
2272 | return (EIO); | |
2273 | } | |
2274 | } | |
2275 | ||
2276 | if (checkit) { | |
9babb374 BB |
2277 | if (type == DENY) { |
2278 | DTRACE_PROBE3(zfs__ace__denies, | |
2279 | znode_t *, zp, | |
2280 | zfs_ace_hdr_t *, acep, | |
2281 | uint32_t, mask_matched); | |
2282 | deny_mask |= mask_matched; | |
2283 | } else { | |
2284 | DTRACE_PROBE3(zfs__ace__allows, | |
2285 | znode_t *, zp, | |
2286 | zfs_ace_hdr_t *, acep, | |
2287 | uint32_t, mask_matched); | |
2288 | if (anyaccess) { | |
2289 | mutex_exit(&zp->z_acl_lock); | |
9babb374 BB |
2290 | return (0); |
2291 | } | |
34dc7c2f | 2292 | } |
9babb374 | 2293 | *working_mode &= ~mask_matched; |
34dc7c2f BB |
2294 | } |
2295 | ||
2296 | /* Are we done? */ | |
2297 | if (*working_mode == 0) | |
2298 | break; | |
2299 | } | |
2300 | ||
2301 | mutex_exit(&zp->z_acl_lock); | |
34dc7c2f BB |
2302 | |
2303 | /* Put the found 'denies' back on the working mode */ | |
b128c09f BB |
2304 | if (deny_mask) { |
2305 | *working_mode |= deny_mask; | |
34dc7c2f | 2306 | return (EACCES); |
b128c09f BB |
2307 | } else if (*working_mode) { |
2308 | return (-1); | |
2309 | } | |
34dc7c2f BB |
2310 | |
2311 | return (0); | |
2312 | } | |
2313 | ||
9babb374 BB |
2314 | /* |
2315 | * Return true if any access whatsoever granted, we don't actually | |
2316 | * care what access is granted. | |
2317 | */ | |
2318 | boolean_t | |
2319 | zfs_has_access(znode_t *zp, cred_t *cr) | |
2320 | { | |
2321 | uint32_t have = ACE_ALL_PERMS; | |
2322 | ||
2323 | if (zfs_zaccess_aces_check(zp, &have, B_TRUE, cr) != 0) { | |
572e2857 BB |
2324 | uid_t owner; |
2325 | ||
3558fd73 BB |
2326 | owner = zfs_fuid_map_id(ZTOZSB(zp), zp->z_uid, cr, ZFS_OWNER); |
2327 | return (secpolicy_vnode_any_access(cr, ZTOI(zp), owner) == 0); | |
9babb374 BB |
2328 | } |
2329 | return (B_TRUE); | |
2330 | } | |
2331 | ||
2332 | static int | |
2333 | zfs_zaccess_common(znode_t *zp, uint32_t v4_mode, uint32_t *working_mode, | |
2334 | boolean_t *check_privs, boolean_t skipaclchk, cred_t *cr) | |
2335 | { | |
3558fd73 | 2336 | zfs_sb_t *zsb = ZTOZSB(zp); |
9babb374 BB |
2337 | int err; |
2338 | ||
2339 | *working_mode = v4_mode; | |
2340 | *check_privs = B_TRUE; | |
2341 | ||
2342 | /* | |
2343 | * Short circuit empty requests | |
2344 | */ | |
3558fd73 | 2345 | if (v4_mode == 0 || zsb->z_replay) { |
9babb374 BB |
2346 | *working_mode = 0; |
2347 | return (0); | |
2348 | } | |
2349 | ||
2350 | if ((err = zfs_zaccess_dataset_check(zp, v4_mode)) != 0) { | |
2351 | *check_privs = B_FALSE; | |
2352 | return (err); | |
2353 | } | |
2354 | ||
2355 | /* | |
2356 | * The caller requested that the ACL check be skipped. This | |
2357 | * would only happen if the caller checked VOP_ACCESS() with a | |
2358 | * 32 bit ACE mask and already had the appropriate permissions. | |
2359 | */ | |
2360 | if (skipaclchk) { | |
2361 | *working_mode = 0; | |
2362 | return (0); | |
2363 | } | |
2364 | ||
2365 | return (zfs_zaccess_aces_check(zp, working_mode, B_FALSE, cr)); | |
2366 | } | |
2367 | ||
34dc7c2f BB |
2368 | static int |
2369 | zfs_zaccess_append(znode_t *zp, uint32_t *working_mode, boolean_t *check_privs, | |
2370 | cred_t *cr) | |
2371 | { | |
2372 | if (*working_mode != ACE_WRITE_DATA) | |
2373 | return (EACCES); | |
2374 | ||
2375 | return (zfs_zaccess_common(zp, ACE_APPEND_DATA, working_mode, | |
2376 | check_privs, B_FALSE, cr)); | |
2377 | } | |
2378 | ||
45d1cae3 BB |
2379 | int |
2380 | zfs_fastaccesschk_execute(znode_t *zdp, cred_t *cr) | |
2381 | { | |
2382 | boolean_t owner = B_FALSE; | |
2383 | boolean_t groupmbr = B_FALSE; | |
2384 | boolean_t is_attr; | |
45d1cae3 BB |
2385 | uid_t uid = crgetuid(cr); |
2386 | int error; | |
2387 | ||
428870ff | 2388 | if (zdp->z_pflags & ZFS_AV_QUARANTINED) |
45d1cae3 BB |
2389 | return (EACCES); |
2390 | ||
428870ff | 2391 | is_attr = ((zdp->z_pflags & ZFS_XATTR) && |
3558fd73 | 2392 | (S_ISDIR(ZTOI(zdp)->i_mode))); |
45d1cae3 BB |
2393 | if (is_attr) |
2394 | goto slow; | |
2395 | ||
428870ff | 2396 | |
45d1cae3 BB |
2397 | mutex_enter(&zdp->z_acl_lock); |
2398 | ||
428870ff | 2399 | if (zdp->z_pflags & ZFS_NO_EXECS_DENIED) { |
45d1cae3 BB |
2400 | mutex_exit(&zdp->z_acl_lock); |
2401 | return (0); | |
2402 | } | |
2403 | ||
572e2857 | 2404 | if (FUID_INDEX(zdp->z_uid) != 0 || FUID_INDEX(zdp->z_gid) != 0) { |
45d1cae3 BB |
2405 | mutex_exit(&zdp->z_acl_lock); |
2406 | goto slow; | |
2407 | } | |
2408 | ||
428870ff | 2409 | if (uid == zdp->z_uid) { |
45d1cae3 | 2410 | owner = B_TRUE; |
428870ff | 2411 | if (zdp->z_mode & S_IXUSR) { |
45d1cae3 BB |
2412 | mutex_exit(&zdp->z_acl_lock); |
2413 | return (0); | |
2414 | } else { | |
2415 | mutex_exit(&zdp->z_acl_lock); | |
2416 | goto slow; | |
2417 | } | |
2418 | } | |
428870ff | 2419 | if (groupmember(zdp->z_gid, cr)) { |
45d1cae3 | 2420 | groupmbr = B_TRUE; |
428870ff | 2421 | if (zdp->z_mode & S_IXGRP) { |
45d1cae3 BB |
2422 | mutex_exit(&zdp->z_acl_lock); |
2423 | return (0); | |
2424 | } else { | |
2425 | mutex_exit(&zdp->z_acl_lock); | |
2426 | goto slow; | |
2427 | } | |
2428 | } | |
2429 | if (!owner && !groupmbr) { | |
428870ff | 2430 | if (zdp->z_mode & S_IXOTH) { |
45d1cae3 BB |
2431 | mutex_exit(&zdp->z_acl_lock); |
2432 | return (0); | |
2433 | } | |
2434 | } | |
2435 | ||
2436 | mutex_exit(&zdp->z_acl_lock); | |
2437 | ||
2438 | slow: | |
2439 | DTRACE_PROBE(zfs__fastpath__execute__access__miss); | |
3558fd73 | 2440 | ZFS_ENTER(ZTOZSB(zdp)); |
45d1cae3 | 2441 | error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr); |
3558fd73 | 2442 | ZFS_EXIT(ZTOZSB(zdp)); |
45d1cae3 BB |
2443 | return (error); |
2444 | } | |
2445 | ||
34dc7c2f | 2446 | /* |
428870ff BB |
2447 | * Determine whether Access should be granted/denied. |
2448 | * The least priv subsytem is always consulted as a basic privilege | |
2449 | * can define any form of access. | |
34dc7c2f BB |
2450 | */ |
2451 | int | |
2452 | zfs_zaccess(znode_t *zp, int mode, int flags, boolean_t skipaclchk, cred_t *cr) | |
2453 | { | |
2454 | uint32_t working_mode; | |
2455 | int error; | |
2456 | int is_attr; | |
3558fd73 | 2457 | boolean_t check_privs; |
34dc7c2f | 2458 | znode_t *xzp; |
3558fd73 | 2459 | znode_t *check_zp = zp; |
428870ff | 2460 | mode_t needed_bits; |
572e2857 | 2461 | uid_t owner; |
34dc7c2f | 2462 | |
3558fd73 | 2463 | is_attr = ((zp->z_pflags & ZFS_XATTR) && S_ISDIR(ZTOI(zp)->i_mode)); |
34dc7c2f BB |
2464 | |
2465 | /* | |
2466 | * If attribute then validate against base file | |
2467 | */ | |
2468 | if (is_attr) { | |
428870ff BB |
2469 | uint64_t parent; |
2470 | ||
2471 | if ((error = sa_lookup(zp->z_sa_hdl, | |
3558fd73 | 2472 | SA_ZPL_PARENT(ZTOZSB(zp)), &parent, |
428870ff BB |
2473 | sizeof (parent))) != 0) |
2474 | return (error); | |
2475 | ||
3558fd73 | 2476 | if ((error = zfs_zget(ZTOZSB(zp), |
428870ff | 2477 | parent, &xzp)) != 0) { |
34dc7c2f BB |
2478 | return (error); |
2479 | } | |
2480 | ||
2481 | check_zp = xzp; | |
2482 | ||
2483 | /* | |
2484 | * fixup mode to map to xattr perms | |
2485 | */ | |
2486 | ||
2487 | if (mode & (ACE_WRITE_DATA|ACE_APPEND_DATA)) { | |
2488 | mode &= ~(ACE_WRITE_DATA|ACE_APPEND_DATA); | |
2489 | mode |= ACE_WRITE_NAMED_ATTRS; | |
2490 | } | |
2491 | ||
2492 | if (mode & (ACE_READ_DATA|ACE_EXECUTE)) { | |
2493 | mode &= ~(ACE_READ_DATA|ACE_EXECUTE); | |
2494 | mode |= ACE_READ_NAMED_ATTRS; | |
2495 | } | |
2496 | } | |
2497 | ||
3558fd73 | 2498 | owner = zfs_fuid_map_id(ZTOZSB(zp), zp->z_uid, cr, ZFS_OWNER); |
428870ff | 2499 | /* |
3558fd73 BB |
2500 | * Map the bits required to the standard inode flags |
2501 | * S_IRUSR|S_IWUSR|S_IXUSR in the needed_bits. Map the bits | |
2502 | * mapped by working_mode (currently missing) in missing_bits. | |
428870ff BB |
2503 | * Call secpolicy_vnode_access2() with (needed_bits & ~checkmode), |
2504 | * needed_bits. | |
2505 | */ | |
2506 | needed_bits = 0; | |
2507 | ||
2508 | working_mode = mode; | |
2509 | if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES)) && | |
572e2857 | 2510 | owner == crgetuid(cr)) |
428870ff BB |
2511 | working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES); |
2512 | ||
2513 | if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS| | |
2514 | ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE)) | |
3558fd73 | 2515 | needed_bits |= S_IRUSR; |
428870ff BB |
2516 | if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS| |
2517 | ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE)) | |
3558fd73 | 2518 | needed_bits |= S_IWUSR; |
428870ff | 2519 | if (working_mode & ACE_EXECUTE) |
3558fd73 | 2520 | needed_bits |= S_IXUSR; |
428870ff | 2521 | |
34dc7c2f BB |
2522 | if ((error = zfs_zaccess_common(check_zp, mode, &working_mode, |
2523 | &check_privs, skipaclchk, cr)) == 0) { | |
2524 | if (is_attr) | |
3558fd73 BB |
2525 | iput(ZTOI(xzp)); |
2526 | return (secpolicy_vnode_access2(cr, ZTOI(zp), owner, | |
428870ff | 2527 | needed_bits, needed_bits)); |
34dc7c2f BB |
2528 | } |
2529 | ||
2530 | if (error && !check_privs) { | |
2531 | if (is_attr) | |
3558fd73 | 2532 | iput(ZTOI(xzp)); |
34dc7c2f BB |
2533 | return (error); |
2534 | } | |
2535 | ||
2536 | if (error && (flags & V_APPEND)) { | |
2537 | error = zfs_zaccess_append(zp, &working_mode, &check_privs, cr); | |
2538 | } | |
2539 | ||
2540 | if (error && check_privs) { | |
34dc7c2f BB |
2541 | mode_t checkmode = 0; |
2542 | ||
34dc7c2f BB |
2543 | /* |
2544 | * First check for implicit owner permission on | |
2545 | * read_acl/read_attributes | |
2546 | */ | |
2547 | ||
2548 | error = 0; | |
2549 | ASSERT(working_mode != 0); | |
2550 | ||
2551 | if ((working_mode & (ACE_READ_ACL|ACE_READ_ATTRIBUTES) && | |
572e2857 | 2552 | owner == crgetuid(cr))) |
34dc7c2f BB |
2553 | working_mode &= ~(ACE_READ_ACL|ACE_READ_ATTRIBUTES); |
2554 | ||
2555 | if (working_mode & (ACE_READ_DATA|ACE_READ_NAMED_ATTRS| | |
b128c09f | 2556 | ACE_READ_ACL|ACE_READ_ATTRIBUTES|ACE_SYNCHRONIZE)) |
3558fd73 | 2557 | checkmode |= S_IRUSR; |
34dc7c2f | 2558 | if (working_mode & (ACE_WRITE_DATA|ACE_WRITE_NAMED_ATTRS| |
b128c09f | 2559 | ACE_APPEND_DATA|ACE_WRITE_ATTRIBUTES|ACE_SYNCHRONIZE)) |
3558fd73 | 2560 | checkmode |= S_IWUSR; |
34dc7c2f | 2561 | if (working_mode & ACE_EXECUTE) |
3558fd73 | 2562 | checkmode |= S_IXUSR; |
34dc7c2f | 2563 | |
3558fd73 | 2564 | error = secpolicy_vnode_access2(cr, ZTOI(check_zp), owner, |
428870ff | 2565 | needed_bits & ~checkmode, needed_bits); |
34dc7c2f BB |
2566 | |
2567 | if (error == 0 && (working_mode & ACE_WRITE_OWNER)) | |
572e2857 | 2568 | error = secpolicy_vnode_chown(cr, owner); |
34dc7c2f | 2569 | if (error == 0 && (working_mode & ACE_WRITE_ACL)) |
572e2857 | 2570 | error = secpolicy_vnode_setdac(cr, owner); |
34dc7c2f BB |
2571 | |
2572 | if (error == 0 && (working_mode & | |
2573 | (ACE_DELETE|ACE_DELETE_CHILD))) | |
2574 | error = secpolicy_vnode_remove(cr); | |
2575 | ||
b128c09f | 2576 | if (error == 0 && (working_mode & ACE_SYNCHRONIZE)) { |
572e2857 | 2577 | error = secpolicy_vnode_chown(cr, owner); |
b128c09f | 2578 | } |
34dc7c2f BB |
2579 | if (error == 0) { |
2580 | /* | |
2581 | * See if any bits other than those already checked | |
2582 | * for are still present. If so then return EACCES | |
2583 | */ | |
2584 | if (working_mode & ~(ZFS_CHECKED_MASKS)) { | |
2585 | error = EACCES; | |
2586 | } | |
2587 | } | |
428870ff | 2588 | } else if (error == 0) { |
3558fd73 | 2589 | error = secpolicy_vnode_access2(cr, ZTOI(zp), owner, |
428870ff | 2590 | needed_bits, needed_bits); |
34dc7c2f BB |
2591 | } |
2592 | ||
428870ff | 2593 | |
34dc7c2f | 2594 | if (is_attr) |
3558fd73 | 2595 | iput(ZTOI(xzp)); |
34dc7c2f BB |
2596 | |
2597 | return (error); | |
2598 | } | |
2599 | ||
2600 | /* | |
3558fd73 | 2601 | * Translate traditional unix S_IRUSR/S_IWUSR/S_IXUSR mode into |
34dc7c2f BB |
2602 | * native ACL format and call zfs_zaccess() |
2603 | */ | |
2604 | int | |
2605 | zfs_zaccess_rwx(znode_t *zp, mode_t mode, int flags, cred_t *cr) | |
2606 | { | |
2607 | return (zfs_zaccess(zp, zfs_unix_to_v4(mode >> 6), flags, B_FALSE, cr)); | |
2608 | } | |
2609 | ||
2610 | /* | |
2611 | * Access function for secpolicy_vnode_setattr | |
2612 | */ | |
2613 | int | |
2614 | zfs_zaccess_unix(znode_t *zp, mode_t mode, cred_t *cr) | |
2615 | { | |
2616 | int v4_mode = zfs_unix_to_v4(mode >> 6); | |
2617 | ||
2618 | return (zfs_zaccess(zp, v4_mode, 0, B_FALSE, cr)); | |
2619 | } | |
2620 | ||
2621 | static int | |
2622 | zfs_delete_final_check(znode_t *zp, znode_t *dzp, | |
428870ff | 2623 | mode_t available_perms, cred_t *cr) |
34dc7c2f BB |
2624 | { |
2625 | int error; | |
572e2857 BB |
2626 | uid_t downer; |
2627 | ||
3558fd73 | 2628 | downer = zfs_fuid_map_id(ZTOZSB(dzp), dzp->z_uid, cr, ZFS_OWNER); |
34dc7c2f | 2629 | |
3558fd73 BB |
2630 | error = secpolicy_vnode_access2(cr, ZTOI(dzp), |
2631 | downer, available_perms, S_IWUSR|S_IXUSR); | |
34dc7c2f BB |
2632 | |
2633 | if (error == 0) | |
2634 | error = zfs_sticky_remove_access(dzp, zp, cr); | |
2635 | ||
2636 | return (error); | |
2637 | } | |
2638 | ||
2639 | /* | |
2640 | * Determine whether Access should be granted/deny, without | |
2641 | * consulting least priv subsystem. | |
2642 | * | |
2643 | * | |
2644 | * The following chart is the recommended NFSv4 enforcement for | |
2645 | * ability to delete an object. | |
2646 | * | |
2647 | * ------------------------------------------------------- | |
2648 | * | Parent Dir | Target Object Permissions | | |
2649 | * | permissions | | | |
2650 | * ------------------------------------------------------- | |
2651 | * | | ACL Allows | ACL Denies| Delete | | |
2652 | * | | Delete | Delete | unspecified| | |
2653 | * ------------------------------------------------------- | |
2654 | * | ACL Allows | Permit | Permit | Permit | | |
2655 | * | DELETE_CHILD | | | |
2656 | * ------------------------------------------------------- | |
2657 | * | ACL Denies | Permit | Deny | Deny | | |
2658 | * | DELETE_CHILD | | | | | |
2659 | * ------------------------------------------------------- | |
2660 | * | ACL specifies | | | | | |
2661 | * | only allow | Permit | Permit | Permit | | |
2662 | * | write and | | | | | |
2663 | * | execute | | | | | |
2664 | * ------------------------------------------------------- | |
2665 | * | ACL denies | | | | | |
2666 | * | write and | Permit | Deny | Deny | | |
2667 | * | execute | | | | | |
2668 | * ------------------------------------------------------- | |
2669 | * ^ | |
2670 | * | | |
2671 | * No search privilege, can't even look up file? | |
2672 | * | |
2673 | */ | |
2674 | int | |
2675 | zfs_zaccess_delete(znode_t *dzp, znode_t *zp, cred_t *cr) | |
2676 | { | |
2677 | uint32_t dzp_working_mode = 0; | |
2678 | uint32_t zp_working_mode = 0; | |
2679 | int dzp_error, zp_error; | |
428870ff | 2680 | mode_t available_perms; |
34dc7c2f BB |
2681 | boolean_t dzpcheck_privs = B_TRUE; |
2682 | boolean_t zpcheck_privs = B_TRUE; | |
2683 | ||
2684 | /* | |
2685 | * We want specific DELETE permissions to | |
2686 | * take precedence over WRITE/EXECUTE. We don't | |
2687 | * want an ACL such as this to mess us up. | |
2688 | * user:joe:write_data:deny,user:joe:delete:allow | |
2689 | * | |
2690 | * However, deny permissions may ultimately be overridden | |
2691 | * by secpolicy_vnode_access(). | |
2692 | * | |
2693 | * We will ask for all of the necessary permissions and then | |
2694 | * look at the working modes from the directory and target object | |
2695 | * to determine what was found. | |
2696 | */ | |
2697 | ||
428870ff | 2698 | if (zp->z_pflags & (ZFS_IMMUTABLE | ZFS_NOUNLINK)) |
34dc7c2f BB |
2699 | return (EPERM); |
2700 | ||
2701 | /* | |
b128c09f | 2702 | * First row |
34dc7c2f BB |
2703 | * If the directory permissions allow the delete, we are done. |
2704 | */ | |
b128c09f | 2705 | if ((dzp_error = zfs_zaccess_common(dzp, ACE_DELETE_CHILD, |
34dc7c2f BB |
2706 | &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr)) == 0) |
2707 | return (0); | |
2708 | ||
2709 | /* | |
2710 | * If target object has delete permission then we are done | |
2711 | */ | |
2712 | if ((zp_error = zfs_zaccess_common(zp, ACE_DELETE, &zp_working_mode, | |
2713 | &zpcheck_privs, B_FALSE, cr)) == 0) | |
2714 | return (0); | |
2715 | ||
b128c09f BB |
2716 | ASSERT(dzp_error && zp_error); |
2717 | ||
34dc7c2f BB |
2718 | if (!dzpcheck_privs) |
2719 | return (dzp_error); | |
b128c09f | 2720 | if (!zpcheck_privs) |
34dc7c2f BB |
2721 | return (zp_error); |
2722 | ||
34dc7c2f BB |
2723 | /* |
2724 | * Second row | |
b128c09f BB |
2725 | * |
2726 | * If directory returns EACCES then delete_child was denied | |
2727 | * due to deny delete_child. In this case send the request through | |
2728 | * secpolicy_vnode_remove(). We don't use zfs_delete_final_check() | |
2729 | * since that *could* allow the delete based on write/execute permission | |
2730 | * and we want delete permissions to override write/execute. | |
34dc7c2f BB |
2731 | */ |
2732 | ||
34dc7c2f | 2733 | if (dzp_error == EACCES) |
b128c09f | 2734 | return (secpolicy_vnode_remove(cr)); |
34dc7c2f BB |
2735 | |
2736 | /* | |
2737 | * Third Row | |
2738 | * only need to see if we have write/execute on directory. | |
2739 | */ | |
2740 | ||
428870ff BB |
2741 | dzp_error = zfs_zaccess_common(dzp, ACE_EXECUTE|ACE_WRITE_DATA, |
2742 | &dzp_working_mode, &dzpcheck_privs, B_FALSE, cr); | |
34dc7c2f | 2743 | |
428870ff | 2744 | if (dzp_error != 0 && !dzpcheck_privs) |
b128c09f BB |
2745 | return (dzp_error); |
2746 | ||
34dc7c2f | 2747 | /* |
b128c09f | 2748 | * Fourth row |
34dc7c2f BB |
2749 | */ |
2750 | ||
3558fd73 BB |
2751 | available_perms = (dzp_working_mode & ACE_WRITE_DATA) ? 0 : S_IWUSR; |
2752 | available_perms |= (dzp_working_mode & ACE_EXECUTE) ? 0 : S_IXUSR; | |
34dc7c2f | 2753 | |
428870ff | 2754 | return (zfs_delete_final_check(zp, dzp, available_perms, cr)); |
b128c09f | 2755 | |
34dc7c2f BB |
2756 | } |
2757 | ||
2758 | int | |
2759 | zfs_zaccess_rename(znode_t *sdzp, znode_t *szp, znode_t *tdzp, | |
2760 | znode_t *tzp, cred_t *cr) | |
2761 | { | |
2762 | int add_perm; | |
2763 | int error; | |
2764 | ||
428870ff | 2765 | if (szp->z_pflags & ZFS_AV_QUARANTINED) |
34dc7c2f BB |
2766 | return (EACCES); |
2767 | ||
3558fd73 | 2768 | add_perm = S_ISDIR(ZTOI(szp)->i_mode) ? |
34dc7c2f BB |
2769 | ACE_ADD_SUBDIRECTORY : ACE_ADD_FILE; |
2770 | ||
2771 | /* | |
2772 | * Rename permissions are combination of delete permission + | |
2773 | * add file/subdir permission. | |
2774 | */ | |
2775 | ||
2776 | /* | |
2777 | * first make sure we do the delete portion. | |
2778 | * | |
2779 | * If that succeeds then check for add_file/add_subdir permissions | |
2780 | */ | |
2781 | ||
149e873a | 2782 | if ((error = zfs_zaccess_delete(sdzp, szp, cr))) |
34dc7c2f BB |
2783 | return (error); |
2784 | ||
2785 | /* | |
2786 | * If we have a tzp, see if we can delete it? | |
2787 | */ | |
2788 | if (tzp) { | |
149e873a | 2789 | if ((error = zfs_zaccess_delete(tdzp, tzp, cr))) |
34dc7c2f BB |
2790 | return (error); |
2791 | } | |
2792 | ||
2793 | /* | |
2794 | * Now check for add permissions | |
2795 | */ | |
2796 | error = zfs_zaccess(tdzp, add_perm, 0, B_FALSE, cr); | |
2797 | ||
2798 | return (error); | |
2799 | } |