Commit | Line | Data |
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bcb02034 SF |
1 | /* |
2 | * fs/cifs/cifsacl.c | |
3 | * | |
8b1327f6 | 4 | * Copyright (C) International Business Machines Corp., 2007,2008 |
bcb02034 SF |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * Contains the routines for mapping CIFS/NTFS ACLs | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
65874007 | 24 | #include <linux/fs.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
4d79dba0 SP |
26 | #include <linux/string.h> |
27 | #include <linux/keyctl.h> | |
28 | #include <linux/key-type.h> | |
29 | #include <keys/user-type.h> | |
65874007 SF |
30 | #include "cifspdu.h" |
31 | #include "cifsglob.h" | |
d0d66c44 | 32 | #include "cifsacl.h" |
65874007 SF |
33 | #include "cifsproto.h" |
34 | #include "cifs_debug.h" | |
65874007 | 35 | |
297647c2 | 36 | |
af6f4612 | 37 | static struct cifs_wksid wksidarr[NUM_WK_SIDS] = { |
297647c2 SF |
38 | {{1, 0, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0} }, "null user"}, |
39 | {{1, 1, {0, 0, 0, 0, 0, 1}, {0, 0, 0, 0, 0} }, "nobody"}, | |
536abdb0 JL |
40 | {{1, 1, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(11), 0, 0, 0, 0} }, "net-users"}, |
41 | {{1, 1, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(18), 0, 0, 0, 0} }, "sys"}, | |
42 | {{1, 2, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(32), __constant_cpu_to_le32(544), 0, 0, 0} }, "root"}, | |
43 | {{1, 2, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(32), __constant_cpu_to_le32(545), 0, 0, 0} }, "users"}, | |
44 | {{1, 2, {0, 0, 0, 0, 0, 5}, {__constant_cpu_to_le32(32), __constant_cpu_to_le32(546), 0, 0, 0} }, "guest"} } | |
44093ca2 | 45 | ; |
297647c2 SF |
46 | |
47 | ||
2fbc2f17 | 48 | /* security id for everyone/world system group */ |
e01b6400 SP |
49 | static const struct cifs_sid sid_everyone = { |
50 | 1, 1, {0, 0, 0, 0, 0, 1}, {0} }; | |
2fbc2f17 SP |
51 | /* security id for Authenticated Users system group */ |
52 | static const struct cifs_sid sid_authusers = { | |
53 | 1, 1, {0, 0, 0, 0, 0, 5}, {11} }; | |
bcb02034 | 54 | /* group users */ |
ad7a2926 | 55 | static const struct cifs_sid sid_user = {1, 2 , {0, 0, 0, 0, 0, 5}, {} }; |
d0d66c44 | 56 | |
4d79dba0 SP |
57 | static const struct cred *root_cred; |
58 | ||
59 | /* | |
60 | * Run idmap cache shrinker. | |
61 | */ | |
62 | static int | |
63 | cifs_idmap_shrinker(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask) | |
64 | { | |
65 | /* Use a pruning scheme in a subsequent patch instead */ | |
66 | cifs_destroy_idmaptrees(); | |
67 | return 0; | |
68 | } | |
69 | ||
70 | static struct shrinker cifs_shrinker = { | |
71 | .shrink = cifs_idmap_shrinker, | |
72 | .seeks = DEFAULT_SEEKS, | |
73 | }; | |
74 | ||
75 | static int | |
76 | cifs_idmap_key_instantiate(struct key *key, const void *data, size_t datalen) | |
77 | { | |
78 | char *payload; | |
79 | ||
80 | payload = kmalloc(datalen, GFP_KERNEL); | |
81 | if (!payload) | |
82 | return -ENOMEM; | |
83 | ||
84 | memcpy(payload, data, datalen); | |
85 | key->payload.data = payload; | |
86 | return 0; | |
87 | } | |
88 | ||
89 | static inline void | |
90 | cifs_idmap_key_destroy(struct key *key) | |
91 | { | |
92 | kfree(key->payload.data); | |
93 | } | |
94 | ||
95 | static | |
96 | struct key_type cifs_idmap_key_type = { | |
97 | .name = "cifs.cifs_idmap", | |
98 | .instantiate = cifs_idmap_key_instantiate, | |
99 | .destroy = cifs_idmap_key_destroy, | |
100 | .describe = user_describe, | |
101 | .match = user_match, | |
102 | }; | |
103 | ||
104 | int | |
105 | init_cifs_idmap(void) | |
106 | { | |
107 | struct cred *cred; | |
108 | struct key *keyring; | |
109 | int ret; | |
110 | ||
111 | cFYI(1, "Registering the %s key type\n", cifs_idmap_key_type.name); | |
112 | ||
113 | /* create an override credential set with a special thread keyring in | |
114 | * which requests are cached | |
115 | * | |
116 | * this is used to prevent malicious redirections from being installed | |
117 | * with add_key(). | |
118 | */ | |
119 | cred = prepare_kernel_cred(NULL); | |
120 | if (!cred) | |
121 | return -ENOMEM; | |
122 | ||
123 | keyring = key_alloc(&key_type_keyring, ".cifs_idmap", 0, 0, cred, | |
124 | (KEY_POS_ALL & ~KEY_POS_SETATTR) | | |
125 | KEY_USR_VIEW | KEY_USR_READ, | |
126 | KEY_ALLOC_NOT_IN_QUOTA); | |
127 | if (IS_ERR(keyring)) { | |
128 | ret = PTR_ERR(keyring); | |
129 | goto failed_put_cred; | |
130 | } | |
131 | ||
132 | ret = key_instantiate_and_link(keyring, NULL, 0, NULL, NULL); | |
133 | if (ret < 0) | |
134 | goto failed_put_key; | |
135 | ||
136 | ret = register_key_type(&cifs_idmap_key_type); | |
137 | if (ret < 0) | |
138 | goto failed_put_key; | |
139 | ||
140 | /* instruct request_key() to use this special keyring as a cache for | |
141 | * the results it looks up */ | |
142 | cred->thread_keyring = keyring; | |
143 | cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING; | |
144 | root_cred = cred; | |
145 | ||
146 | spin_lock_init(&siduidlock); | |
147 | uidtree = RB_ROOT; | |
148 | spin_lock_init(&sidgidlock); | |
149 | gidtree = RB_ROOT; | |
150 | ||
151 | register_shrinker(&cifs_shrinker); | |
152 | ||
153 | cFYI(1, "cifs idmap keyring: %d\n", key_serial(keyring)); | |
154 | return 0; | |
155 | ||
156 | failed_put_key: | |
157 | key_put(keyring); | |
158 | failed_put_cred: | |
159 | put_cred(cred); | |
160 | return ret; | |
161 | } | |
162 | ||
163 | void | |
164 | exit_cifs_idmap(void) | |
165 | { | |
166 | key_revoke(root_cred->thread_keyring); | |
167 | unregister_key_type(&cifs_idmap_key_type); | |
168 | put_cred(root_cred); | |
169 | unregister_shrinker(&cifs_shrinker); | |
170 | cFYI(1, "Unregistered %s key type\n", cifs_idmap_key_type.name); | |
171 | } | |
172 | ||
173 | void | |
174 | cifs_destroy_idmaptrees(void) | |
175 | { | |
176 | struct rb_root *root; | |
177 | struct rb_node *node; | |
178 | ||
179 | root = &uidtree; | |
180 | spin_lock(&siduidlock); | |
181 | while ((node = rb_first(root))) | |
182 | rb_erase(node, root); | |
183 | spin_unlock(&siduidlock); | |
184 | ||
185 | root = &gidtree; | |
186 | spin_lock(&sidgidlock); | |
187 | while ((node = rb_first(root))) | |
188 | rb_erase(node, root); | |
189 | spin_unlock(&sidgidlock); | |
190 | } | |
297647c2 SF |
191 | |
192 | int match_sid(struct cifs_sid *ctsid) | |
193 | { | |
194 | int i, j; | |
195 | int num_subauth, num_sat, num_saw; | |
196 | struct cifs_sid *cwsid; | |
197 | ||
198 | if (!ctsid) | |
ef571cad | 199 | return -1; |
297647c2 SF |
200 | |
201 | for (i = 0; i < NUM_WK_SIDS; ++i) { | |
202 | cwsid = &(wksidarr[i].cifssid); | |
203 | ||
204 | /* compare the revision */ | |
205 | if (ctsid->revision != cwsid->revision) | |
206 | continue; | |
207 | ||
208 | /* compare all of the six auth values */ | |
209 | for (j = 0; j < 6; ++j) { | |
210 | if (ctsid->authority[j] != cwsid->authority[j]) | |
211 | break; | |
212 | } | |
213 | if (j < 6) | |
214 | continue; /* all of the auth values did not match */ | |
215 | ||
216 | /* compare all of the subauth values if any */ | |
ce51ae14 DK |
217 | num_sat = ctsid->num_subauth; |
218 | num_saw = cwsid->num_subauth; | |
297647c2 SF |
219 | num_subauth = num_sat < num_saw ? num_sat : num_saw; |
220 | if (num_subauth) { | |
221 | for (j = 0; j < num_subauth; ++j) { | |
222 | if (ctsid->sub_auth[j] != cwsid->sub_auth[j]) | |
223 | break; | |
224 | } | |
225 | if (j < num_subauth) | |
226 | continue; /* all sub_auth values do not match */ | |
227 | } | |
228 | ||
b6b38f70 | 229 | cFYI(1, "matching sid: %s\n", wksidarr[i].sidname); |
ef571cad | 230 | return 0; /* sids compare/match */ |
297647c2 SF |
231 | } |
232 | ||
b6b38f70 | 233 | cFYI(1, "No matching sid"); |
ef571cad | 234 | return -1; |
297647c2 SF |
235 | } |
236 | ||
a750e77c SF |
237 | /* if the two SIDs (roughly equivalent to a UUID for a user or group) are |
238 | the same returns 1, if they do not match returns 0 */ | |
630f3f0c | 239 | int compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid) |
297647c2 SF |
240 | { |
241 | int i; | |
242 | int num_subauth, num_sat, num_saw; | |
243 | ||
244 | if ((!ctsid) || (!cwsid)) | |
ef571cad | 245 | return 0; |
297647c2 SF |
246 | |
247 | /* compare the revision */ | |
248 | if (ctsid->revision != cwsid->revision) | |
ef571cad | 249 | return 0; |
297647c2 SF |
250 | |
251 | /* compare all of the six auth values */ | |
252 | for (i = 0; i < 6; ++i) { | |
253 | if (ctsid->authority[i] != cwsid->authority[i]) | |
ef571cad | 254 | return 0; |
297647c2 SF |
255 | } |
256 | ||
257 | /* compare all of the subauth values if any */ | |
adbc0358 | 258 | num_sat = ctsid->num_subauth; |
adddd49d | 259 | num_saw = cwsid->num_subauth; |
297647c2 SF |
260 | num_subauth = num_sat < num_saw ? num_sat : num_saw; |
261 | if (num_subauth) { | |
262 | for (i = 0; i < num_subauth; ++i) { | |
263 | if (ctsid->sub_auth[i] != cwsid->sub_auth[i]) | |
ef571cad | 264 | return 0; |
297647c2 SF |
265 | } |
266 | } | |
267 | ||
ef571cad | 268 | return 1; /* sids compare/match */ |
297647c2 SF |
269 | } |
270 | ||
97837582 SF |
271 | |
272 | /* copy ntsd, owner sid, and group sid from a security descriptor to another */ | |
273 | static void copy_sec_desc(const struct cifs_ntsd *pntsd, | |
274 | struct cifs_ntsd *pnntsd, __u32 sidsoffset) | |
275 | { | |
276 | int i; | |
277 | ||
278 | struct cifs_sid *owner_sid_ptr, *group_sid_ptr; | |
279 | struct cifs_sid *nowner_sid_ptr, *ngroup_sid_ptr; | |
280 | ||
281 | /* copy security descriptor control portion */ | |
282 | pnntsd->revision = pntsd->revision; | |
283 | pnntsd->type = pntsd->type; | |
284 | pnntsd->dacloffset = cpu_to_le32(sizeof(struct cifs_ntsd)); | |
285 | pnntsd->sacloffset = 0; | |
286 | pnntsd->osidoffset = cpu_to_le32(sidsoffset); | |
287 | pnntsd->gsidoffset = cpu_to_le32(sidsoffset + sizeof(struct cifs_sid)); | |
288 | ||
289 | /* copy owner sid */ | |
290 | owner_sid_ptr = (struct cifs_sid *)((char *)pntsd + | |
291 | le32_to_cpu(pntsd->osidoffset)); | |
292 | nowner_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset); | |
293 | ||
294 | nowner_sid_ptr->revision = owner_sid_ptr->revision; | |
295 | nowner_sid_ptr->num_subauth = owner_sid_ptr->num_subauth; | |
296 | for (i = 0; i < 6; i++) | |
297 | nowner_sid_ptr->authority[i] = owner_sid_ptr->authority[i]; | |
298 | for (i = 0; i < 5; i++) | |
299 | nowner_sid_ptr->sub_auth[i] = owner_sid_ptr->sub_auth[i]; | |
300 | ||
301 | /* copy group sid */ | |
302 | group_sid_ptr = (struct cifs_sid *)((char *)pntsd + | |
303 | le32_to_cpu(pntsd->gsidoffset)); | |
304 | ngroup_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset + | |
305 | sizeof(struct cifs_sid)); | |
306 | ||
307 | ngroup_sid_ptr->revision = group_sid_ptr->revision; | |
308 | ngroup_sid_ptr->num_subauth = group_sid_ptr->num_subauth; | |
309 | for (i = 0; i < 6; i++) | |
310 | ngroup_sid_ptr->authority[i] = group_sid_ptr->authority[i]; | |
311 | for (i = 0; i < 5; i++) | |
b1910ad6 | 312 | ngroup_sid_ptr->sub_auth[i] = group_sid_ptr->sub_auth[i]; |
97837582 SF |
313 | |
314 | return; | |
315 | } | |
316 | ||
317 | ||
630f3f0c SF |
318 | /* |
319 | change posix mode to reflect permissions | |
320 | pmode is the existing mode (we only want to overwrite part of this | |
321 | bits to set can be: S_IRWXU, S_IRWXG or S_IRWXO ie 00700 or 00070 or 00007 | |
322 | */ | |
9b5e6857 | 323 | static void access_flags_to_mode(__le32 ace_flags, int type, umode_t *pmode, |
15b03959 | 324 | umode_t *pbits_to_set) |
630f3f0c | 325 | { |
9b5e6857 | 326 | __u32 flags = le32_to_cpu(ace_flags); |
15b03959 | 327 | /* the order of ACEs is important. The canonical order is to begin with |
ce06c9f0 | 328 | DENY entries followed by ALLOW, otherwise an allow entry could be |
15b03959 | 329 | encountered first, making the subsequent deny entry like "dead code" |
ce06c9f0 | 330 | which would be superflous since Windows stops when a match is made |
15b03959 SF |
331 | for the operation you are trying to perform for your user */ |
332 | ||
333 | /* For deny ACEs we change the mask so that subsequent allow access | |
334 | control entries do not turn on the bits we are denying */ | |
335 | if (type == ACCESS_DENIED) { | |
ad7a2926 | 336 | if (flags & GENERIC_ALL) |
15b03959 | 337 | *pbits_to_set &= ~S_IRWXUGO; |
ad7a2926 | 338 | |
9b5e6857 AV |
339 | if ((flags & GENERIC_WRITE) || |
340 | ((flags & FILE_WRITE_RIGHTS) == FILE_WRITE_RIGHTS)) | |
15b03959 | 341 | *pbits_to_set &= ~S_IWUGO; |
9b5e6857 AV |
342 | if ((flags & GENERIC_READ) || |
343 | ((flags & FILE_READ_RIGHTS) == FILE_READ_RIGHTS)) | |
15b03959 | 344 | *pbits_to_set &= ~S_IRUGO; |
9b5e6857 AV |
345 | if ((flags & GENERIC_EXECUTE) || |
346 | ((flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS)) | |
15b03959 SF |
347 | *pbits_to_set &= ~S_IXUGO; |
348 | return; | |
349 | } else if (type != ACCESS_ALLOWED) { | |
b6b38f70 | 350 | cERROR(1, "unknown access control type %d", type); |
15b03959 SF |
351 | return; |
352 | } | |
353 | /* else ACCESS_ALLOWED type */ | |
630f3f0c | 354 | |
9b5e6857 | 355 | if (flags & GENERIC_ALL) { |
15b03959 | 356 | *pmode |= (S_IRWXUGO & (*pbits_to_set)); |
b6b38f70 | 357 | cFYI(DBG2, "all perms"); |
d61e5808 SF |
358 | return; |
359 | } | |
9b5e6857 AV |
360 | if ((flags & GENERIC_WRITE) || |
361 | ((flags & FILE_WRITE_RIGHTS) == FILE_WRITE_RIGHTS)) | |
15b03959 | 362 | *pmode |= (S_IWUGO & (*pbits_to_set)); |
9b5e6857 AV |
363 | if ((flags & GENERIC_READ) || |
364 | ((flags & FILE_READ_RIGHTS) == FILE_READ_RIGHTS)) | |
15b03959 | 365 | *pmode |= (S_IRUGO & (*pbits_to_set)); |
9b5e6857 AV |
366 | if ((flags & GENERIC_EXECUTE) || |
367 | ((flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS)) | |
15b03959 | 368 | *pmode |= (S_IXUGO & (*pbits_to_set)); |
630f3f0c | 369 | |
b6b38f70 | 370 | cFYI(DBG2, "access flags 0x%x mode now 0x%x", flags, *pmode); |
630f3f0c SF |
371 | return; |
372 | } | |
373 | ||
ce06c9f0 SF |
374 | /* |
375 | Generate access flags to reflect permissions mode is the existing mode. | |
376 | This function is called for every ACE in the DACL whose SID matches | |
377 | with either owner or group or everyone. | |
378 | */ | |
379 | ||
380 | static void mode_to_access_flags(umode_t mode, umode_t bits_to_use, | |
381 | __u32 *pace_flags) | |
382 | { | |
383 | /* reset access mask */ | |
384 | *pace_flags = 0x0; | |
385 | ||
386 | /* bits to use are either S_IRWXU or S_IRWXG or S_IRWXO */ | |
387 | mode &= bits_to_use; | |
388 | ||
389 | /* check for R/W/X UGO since we do not know whose flags | |
390 | is this but we have cleared all the bits sans RWX for | |
391 | either user or group or other as per bits_to_use */ | |
392 | if (mode & S_IRUGO) | |
393 | *pace_flags |= SET_FILE_READ_RIGHTS; | |
394 | if (mode & S_IWUGO) | |
395 | *pace_flags |= SET_FILE_WRITE_RIGHTS; | |
396 | if (mode & S_IXUGO) | |
397 | *pace_flags |= SET_FILE_EXEC_RIGHTS; | |
398 | ||
b6b38f70 | 399 | cFYI(DBG2, "mode: 0x%x, access flags now 0x%x", mode, *pace_flags); |
ce06c9f0 SF |
400 | return; |
401 | } | |
402 | ||
2b210adc | 403 | static __u16 fill_ace_for_sid(struct cifs_ace *pntace, |
97837582 SF |
404 | const struct cifs_sid *psid, __u64 nmode, umode_t bits) |
405 | { | |
406 | int i; | |
407 | __u16 size = 0; | |
408 | __u32 access_req = 0; | |
409 | ||
410 | pntace->type = ACCESS_ALLOWED; | |
411 | pntace->flags = 0x0; | |
412 | mode_to_access_flags(nmode, bits, &access_req); | |
413 | if (!access_req) | |
414 | access_req = SET_MINIMUM_RIGHTS; | |
415 | pntace->access_req = cpu_to_le32(access_req); | |
416 | ||
417 | pntace->sid.revision = psid->revision; | |
418 | pntace->sid.num_subauth = psid->num_subauth; | |
419 | for (i = 0; i < 6; i++) | |
420 | pntace->sid.authority[i] = psid->authority[i]; | |
421 | for (i = 0; i < psid->num_subauth; i++) | |
422 | pntace->sid.sub_auth[i] = psid->sub_auth[i]; | |
423 | ||
424 | size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth * 4); | |
425 | pntace->size = cpu_to_le16(size); | |
426 | ||
ef571cad | 427 | return size; |
97837582 SF |
428 | } |
429 | ||
297647c2 | 430 | |
953f8681 SF |
431 | #ifdef CONFIG_CIFS_DEBUG2 |
432 | static void dump_ace(struct cifs_ace *pace, char *end_of_acl) | |
d0d66c44 | 433 | { |
d0d66c44 | 434 | int num_subauth; |
d0d66c44 SP |
435 | |
436 | /* validate that we do not go past end of acl */ | |
297647c2 | 437 | |
44093ca2 | 438 | if (le16_to_cpu(pace->size) < 16) { |
b6b38f70 | 439 | cERROR(1, "ACE too small %d", le16_to_cpu(pace->size)); |
44093ca2 SF |
440 | return; |
441 | } | |
442 | ||
443 | if (end_of_acl < (char *)pace + le16_to_cpu(pace->size)) { | |
b6b38f70 | 444 | cERROR(1, "ACL too small to parse ACE"); |
d0d66c44 | 445 | return; |
44093ca2 | 446 | } |
d0d66c44 | 447 | |
44093ca2 | 448 | num_subauth = pace->sid.num_subauth; |
d0d66c44 | 449 | if (num_subauth) { |
8f18c131 | 450 | int i; |
b6b38f70 | 451 | cFYI(1, "ACE revision %d num_auth %d type %d flags %d size %d", |
44093ca2 | 452 | pace->sid.revision, pace->sid.num_subauth, pace->type, |
b6b38f70 | 453 | pace->flags, le16_to_cpu(pace->size)); |
d12fd121 | 454 | for (i = 0; i < num_subauth; ++i) { |
b6b38f70 JP |
455 | cFYI(1, "ACE sub_auth[%d]: 0x%x", i, |
456 | le32_to_cpu(pace->sid.sub_auth[i])); | |
d12fd121 SF |
457 | } |
458 | ||
459 | /* BB add length check to make sure that we do not have huge | |
460 | num auths and therefore go off the end */ | |
d12fd121 SF |
461 | } |
462 | ||
463 | return; | |
464 | } | |
953f8681 | 465 | #endif |
d12fd121 | 466 | |
d0d66c44 | 467 | |
a750e77c | 468 | static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, |
d61e5808 | 469 | struct cifs_sid *pownersid, struct cifs_sid *pgrpsid, |
0b8f18e3 | 470 | struct cifs_fattr *fattr) |
d0d66c44 SP |
471 | { |
472 | int i; | |
473 | int num_aces = 0; | |
474 | int acl_size; | |
475 | char *acl_base; | |
d0d66c44 SP |
476 | struct cifs_ace **ppace; |
477 | ||
478 | /* BB need to add parm so we can store the SID BB */ | |
479 | ||
2b83457b SF |
480 | if (!pdacl) { |
481 | /* no DACL in the security descriptor, set | |
482 | all the permissions for user/group/other */ | |
0b8f18e3 | 483 | fattr->cf_mode |= S_IRWXUGO; |
2b83457b SF |
484 | return; |
485 | } | |
486 | ||
d0d66c44 | 487 | /* validate that we do not go past end of acl */ |
af6f4612 | 488 | if (end_of_acl < (char *)pdacl + le16_to_cpu(pdacl->size)) { |
b6b38f70 | 489 | cERROR(1, "ACL too small to parse DACL"); |
d0d66c44 SP |
490 | return; |
491 | } | |
492 | ||
b6b38f70 | 493 | cFYI(DBG2, "DACL revision %d size %d num aces %d", |
af6f4612 | 494 | le16_to_cpu(pdacl->revision), le16_to_cpu(pdacl->size), |
b6b38f70 | 495 | le32_to_cpu(pdacl->num_aces)); |
d0d66c44 | 496 | |
7505e052 SF |
497 | /* reset rwx permissions for user/group/other. |
498 | Also, if num_aces is 0 i.e. DACL has no ACEs, | |
499 | user/group/other have no permissions */ | |
0b8f18e3 | 500 | fattr->cf_mode &= ~(S_IRWXUGO); |
7505e052 | 501 | |
d0d66c44 SP |
502 | acl_base = (char *)pdacl; |
503 | acl_size = sizeof(struct cifs_acl); | |
504 | ||
adbc0358 | 505 | num_aces = le32_to_cpu(pdacl->num_aces); |
d0d66c44 | 506 | if (num_aces > 0) { |
15b03959 SF |
507 | umode_t user_mask = S_IRWXU; |
508 | umode_t group_mask = S_IRWXG; | |
2fbc2f17 | 509 | umode_t other_mask = S_IRWXU | S_IRWXG | S_IRWXO; |
15b03959 | 510 | |
d0d66c44 SP |
511 | ppace = kmalloc(num_aces * sizeof(struct cifs_ace *), |
512 | GFP_KERNEL); | |
8132b65b SF |
513 | if (!ppace) { |
514 | cERROR(1, "DACL memory allocation error"); | |
515 | return; | |
516 | } | |
d0d66c44 | 517 | |
d0d66c44 | 518 | for (i = 0; i < num_aces; ++i) { |
44093ca2 | 519 | ppace[i] = (struct cifs_ace *) (acl_base + acl_size); |
953f8681 SF |
520 | #ifdef CONFIG_CIFS_DEBUG2 |
521 | dump_ace(ppace[i], end_of_acl); | |
522 | #endif | |
e01b6400 SP |
523 | if (compare_sids(&(ppace[i]->sid), pownersid)) |
524 | access_flags_to_mode(ppace[i]->access_req, | |
15b03959 | 525 | ppace[i]->type, |
0b8f18e3 | 526 | &fattr->cf_mode, |
15b03959 | 527 | &user_mask); |
e01b6400 SP |
528 | if (compare_sids(&(ppace[i]->sid), pgrpsid)) |
529 | access_flags_to_mode(ppace[i]->access_req, | |
15b03959 | 530 | ppace[i]->type, |
0b8f18e3 | 531 | &fattr->cf_mode, |
15b03959 | 532 | &group_mask); |
e01b6400 SP |
533 | if (compare_sids(&(ppace[i]->sid), &sid_everyone)) |
534 | access_flags_to_mode(ppace[i]->access_req, | |
15b03959 | 535 | ppace[i]->type, |
0b8f18e3 | 536 | &fattr->cf_mode, |
15b03959 | 537 | &other_mask); |
2fbc2f17 SP |
538 | if (compare_sids(&(ppace[i]->sid), &sid_authusers)) |
539 | access_flags_to_mode(ppace[i]->access_req, | |
540 | ppace[i]->type, | |
541 | &fattr->cf_mode, | |
542 | &other_mask); | |
543 | ||
e01b6400 | 544 | |
44093ca2 | 545 | /* memcpy((void *)(&(cifscred->aces[i])), |
d12fd121 SF |
546 | (void *)ppace[i], |
547 | sizeof(struct cifs_ace)); */ | |
d0d66c44 | 548 | |
44093ca2 SF |
549 | acl_base = (char *)ppace[i]; |
550 | acl_size = le16_to_cpu(ppace[i]->size); | |
d0d66c44 SP |
551 | } |
552 | ||
553 | kfree(ppace); | |
d0d66c44 SP |
554 | } |
555 | ||
556 | return; | |
557 | } | |
558 | ||
bcb02034 | 559 | |
97837582 SF |
560 | static int set_chmod_dacl(struct cifs_acl *pndacl, struct cifs_sid *pownersid, |
561 | struct cifs_sid *pgrpsid, __u64 nmode) | |
562 | { | |
2b210adc | 563 | u16 size = 0; |
97837582 SF |
564 | struct cifs_acl *pnndacl; |
565 | ||
566 | pnndacl = (struct cifs_acl *)((char *)pndacl + sizeof(struct cifs_acl)); | |
567 | ||
568 | size += fill_ace_for_sid((struct cifs_ace *) ((char *)pnndacl + size), | |
569 | pownersid, nmode, S_IRWXU); | |
570 | size += fill_ace_for_sid((struct cifs_ace *)((char *)pnndacl + size), | |
571 | pgrpsid, nmode, S_IRWXG); | |
572 | size += fill_ace_for_sid((struct cifs_ace *)((char *)pnndacl + size), | |
573 | &sid_everyone, nmode, S_IRWXO); | |
574 | ||
575 | pndacl->size = cpu_to_le16(size + sizeof(struct cifs_acl)); | |
d9f382ef | 576 | pndacl->num_aces = cpu_to_le32(3); |
97837582 | 577 | |
ef571cad | 578 | return 0; |
97837582 SF |
579 | } |
580 | ||
581 | ||
bcb02034 SF |
582 | static int parse_sid(struct cifs_sid *psid, char *end_of_acl) |
583 | { | |
584 | /* BB need to add parm so we can store the SID BB */ | |
585 | ||
b9c7a2bb SF |
586 | /* validate that we do not go past end of ACL - sid must be at least 8 |
587 | bytes long (assuming no sub-auths - e.g. the null SID */ | |
588 | if (end_of_acl < (char *)psid + 8) { | |
b6b38f70 | 589 | cERROR(1, "ACL too small to parse SID %p", psid); |
bcb02034 SF |
590 | return -EINVAL; |
591 | } | |
d0d66c44 | 592 | |
af6f4612 | 593 | if (psid->num_subauth) { |
bcb02034 | 594 | #ifdef CONFIG_CIFS_DEBUG2 |
8f18c131 | 595 | int i; |
b6b38f70 JP |
596 | cFYI(1, "SID revision %d num_auth %d", |
597 | psid->revision, psid->num_subauth); | |
bcb02034 | 598 | |
af6f4612 | 599 | for (i = 0; i < psid->num_subauth; i++) { |
b6b38f70 JP |
600 | cFYI(1, "SID sub_auth[%d]: 0x%x ", i, |
601 | le32_to_cpu(psid->sub_auth[i])); | |
d0d66c44 SP |
602 | } |
603 | ||
d12fd121 | 604 | /* BB add length check to make sure that we do not have huge |
d0d66c44 | 605 | num auths and therefore go off the end */ |
b6b38f70 JP |
606 | cFYI(1, "RID 0x%x", |
607 | le32_to_cpu(psid->sub_auth[psid->num_subauth-1])); | |
bcb02034 | 608 | #endif |
d0d66c44 SP |
609 | } |
610 | ||
bcb02034 SF |
611 | return 0; |
612 | } | |
613 | ||
d0d66c44 | 614 | |
bcb02034 | 615 | /* Convert CIFS ACL to POSIX form */ |
630f3f0c | 616 | static int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len, |
0b8f18e3 | 617 | struct cifs_fattr *fattr) |
bcb02034 | 618 | { |
d0d66c44 | 619 | int rc; |
bcb02034 SF |
620 | struct cifs_sid *owner_sid_ptr, *group_sid_ptr; |
621 | struct cifs_acl *dacl_ptr; /* no need for SACL ptr */ | |
bcb02034 | 622 | char *end_of_acl = ((char *)pntsd) + acl_len; |
7505e052 | 623 | __u32 dacloffset; |
bcb02034 | 624 | |
0b8f18e3 | 625 | if (pntsd == NULL) |
b9c7a2bb SF |
626 | return -EIO; |
627 | ||
bcb02034 | 628 | owner_sid_ptr = (struct cifs_sid *)((char *)pntsd + |
af6f4612 | 629 | le32_to_cpu(pntsd->osidoffset)); |
bcb02034 | 630 | group_sid_ptr = (struct cifs_sid *)((char *)pntsd + |
af6f4612 | 631 | le32_to_cpu(pntsd->gsidoffset)); |
7505e052 | 632 | dacloffset = le32_to_cpu(pntsd->dacloffset); |
63d2583f | 633 | dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset); |
b6b38f70 | 634 | cFYI(DBG2, "revision %d type 0x%x ooffset 0x%x goffset 0x%x " |
bcb02034 | 635 | "sacloffset 0x%x dacloffset 0x%x", |
af6f4612 SF |
636 | pntsd->revision, pntsd->type, le32_to_cpu(pntsd->osidoffset), |
637 | le32_to_cpu(pntsd->gsidoffset), | |
b6b38f70 | 638 | le32_to_cpu(pntsd->sacloffset), dacloffset); |
b9c7a2bb | 639 | /* cifs_dump_mem("owner_sid: ", owner_sid_ptr, 64); */ |
bcb02034 SF |
640 | rc = parse_sid(owner_sid_ptr, end_of_acl); |
641 | if (rc) | |
642 | return rc; | |
643 | ||
644 | rc = parse_sid(group_sid_ptr, end_of_acl); | |
645 | if (rc) | |
646 | return rc; | |
647 | ||
7505e052 SF |
648 | if (dacloffset) |
649 | parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr, | |
0b8f18e3 | 650 | group_sid_ptr, fattr); |
7505e052 | 651 | else |
b6b38f70 | 652 | cFYI(1, "no ACL"); /* BB grant all or default perms? */ |
d0d66c44 | 653 | |
bcb02034 SF |
654 | /* cifscred->uid = owner_sid_ptr->rid; |
655 | cifscred->gid = group_sid_ptr->rid; | |
656 | memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr, | |
630f3f0c | 657 | sizeof(struct cifs_sid)); |
bcb02034 | 658 | memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr, |
630f3f0c | 659 | sizeof(struct cifs_sid)); */ |
bcb02034 | 660 | |
ef571cad | 661 | return 0; |
bcb02034 | 662 | } |
b9c7a2bb SF |
663 | |
664 | ||
97837582 SF |
665 | /* Convert permission bits from mode to equivalent CIFS ACL */ |
666 | static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd, | |
cce246ee | 667 | struct inode *inode, __u64 nmode) |
97837582 SF |
668 | { |
669 | int rc = 0; | |
670 | __u32 dacloffset; | |
671 | __u32 ndacloffset; | |
672 | __u32 sidsoffset; | |
673 | struct cifs_sid *owner_sid_ptr, *group_sid_ptr; | |
674 | struct cifs_acl *dacl_ptr = NULL; /* no need for SACL ptr */ | |
675 | struct cifs_acl *ndacl_ptr = NULL; /* no need for SACL ptr */ | |
676 | ||
677 | if ((inode == NULL) || (pntsd == NULL) || (pnntsd == NULL)) | |
ef571cad | 678 | return -EIO; |
97837582 SF |
679 | |
680 | owner_sid_ptr = (struct cifs_sid *)((char *)pntsd + | |
681 | le32_to_cpu(pntsd->osidoffset)); | |
682 | group_sid_ptr = (struct cifs_sid *)((char *)pntsd + | |
683 | le32_to_cpu(pntsd->gsidoffset)); | |
684 | ||
685 | dacloffset = le32_to_cpu(pntsd->dacloffset); | |
686 | dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset); | |
687 | ||
688 | ndacloffset = sizeof(struct cifs_ntsd); | |
689 | ndacl_ptr = (struct cifs_acl *)((char *)pnntsd + ndacloffset); | |
690 | ndacl_ptr->revision = dacl_ptr->revision; | |
691 | ndacl_ptr->size = 0; | |
692 | ndacl_ptr->num_aces = 0; | |
693 | ||
694 | rc = set_chmod_dacl(ndacl_ptr, owner_sid_ptr, group_sid_ptr, nmode); | |
695 | ||
696 | sidsoffset = ndacloffset + le16_to_cpu(ndacl_ptr->size); | |
697 | ||
698 | /* copy security descriptor control portion and owner and group sid */ | |
699 | copy_sec_desc(pntsd, pnntsd, sidsoffset); | |
700 | ||
ef571cad | 701 | return rc; |
97837582 SF |
702 | } |
703 | ||
1bf4072d CH |
704 | static struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb, |
705 | __u16 fid, u32 *pacllen) | |
b9c7a2bb | 706 | { |
b9c7a2bb | 707 | struct cifs_ntsd *pntsd = NULL; |
1bf4072d | 708 | int xid, rc; |
7ffec372 JL |
709 | struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); |
710 | ||
711 | if (IS_ERR(tlink)) | |
987b21d7 | 712 | return ERR_CAST(tlink); |
b9c7a2bb | 713 | |
1bf4072d | 714 | xid = GetXid(); |
7ffec372 | 715 | rc = CIFSSMBGetCIFSACL(xid, tlink_tcon(tlink), fid, &pntsd, pacllen); |
1bf4072d | 716 | FreeXid(xid); |
b9c7a2bb | 717 | |
7ffec372 | 718 | cifs_put_tlink(tlink); |
b9c7a2bb | 719 | |
987b21d7 SP |
720 | cFYI(1, "%s: rc = %d ACL len %d", __func__, rc, *pacllen); |
721 | if (rc) | |
722 | return ERR_PTR(rc); | |
1bf4072d CH |
723 | return pntsd; |
724 | } | |
8b1327f6 | 725 | |
1bf4072d CH |
726 | static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, |
727 | const char *path, u32 *pacllen) | |
728 | { | |
729 | struct cifs_ntsd *pntsd = NULL; | |
730 | int oplock = 0; | |
731 | int xid, rc; | |
732 | __u16 fid; | |
7ffec372 JL |
733 | struct cifsTconInfo *tcon; |
734 | struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); | |
735 | ||
736 | if (IS_ERR(tlink)) | |
987b21d7 | 737 | return ERR_CAST(tlink); |
b9c7a2bb | 738 | |
7ffec372 | 739 | tcon = tlink_tcon(tlink); |
1bf4072d CH |
740 | xid = GetXid(); |
741 | ||
7ffec372 | 742 | rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, READ_CONTROL, 0, |
1bf4072d CH |
743 | &fid, &oplock, NULL, cifs_sb->local_nls, |
744 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
987b21d7 SP |
745 | if (!rc) { |
746 | rc = CIFSSMBGetCIFSACL(xid, tcon, fid, &pntsd, pacllen); | |
747 | CIFSSMBClose(xid, tcon, fid); | |
b9c7a2bb SF |
748 | } |
749 | ||
7ffec372 | 750 | cifs_put_tlink(tlink); |
7505e052 | 751 | FreeXid(xid); |
987b21d7 SP |
752 | |
753 | cFYI(1, "%s: rc = %d ACL len %d", __func__, rc, *pacllen); | |
754 | if (rc) | |
755 | return ERR_PTR(rc); | |
7505e052 SF |
756 | return pntsd; |
757 | } | |
758 | ||
1bf4072d | 759 | /* Retrieve an ACL from the server */ |
fbeba8bb | 760 | struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb, |
1bf4072d CH |
761 | struct inode *inode, const char *path, |
762 | u32 *pacllen) | |
763 | { | |
764 | struct cifs_ntsd *pntsd = NULL; | |
765 | struct cifsFileInfo *open_file = NULL; | |
766 | ||
767 | if (inode) | |
6508d904 | 768 | open_file = find_readable_file(CIFS_I(inode), true); |
1bf4072d CH |
769 | if (!open_file) |
770 | return get_cifs_acl_by_path(cifs_sb, path, pacllen); | |
771 | ||
772 | pntsd = get_cifs_acl_by_fid(cifs_sb, open_file->netfid, pacllen); | |
6ab409b5 | 773 | cifsFileInfo_put(open_file); |
1bf4072d CH |
774 | return pntsd; |
775 | } | |
776 | ||
b96d31a6 CH |
777 | static int set_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb, __u16 fid, |
778 | struct cifs_ntsd *pnntsd, u32 acllen) | |
97837582 | 779 | { |
b96d31a6 | 780 | int xid, rc; |
7ffec372 JL |
781 | struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); |
782 | ||
783 | if (IS_ERR(tlink)) | |
784 | return PTR_ERR(tlink); | |
97837582 | 785 | |
b96d31a6 | 786 | xid = GetXid(); |
7ffec372 | 787 | rc = CIFSSMBSetCIFSACL(xid, tlink_tcon(tlink), fid, pnntsd, acllen); |
b96d31a6 | 788 | FreeXid(xid); |
7ffec372 | 789 | cifs_put_tlink(tlink); |
97837582 | 790 | |
b6b38f70 | 791 | cFYI(DBG2, "SetCIFSACL rc = %d", rc); |
b96d31a6 CH |
792 | return rc; |
793 | } | |
97837582 | 794 | |
b96d31a6 CH |
795 | static int set_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, const char *path, |
796 | struct cifs_ntsd *pnntsd, u32 acllen) | |
797 | { | |
798 | int oplock = 0; | |
799 | int xid, rc; | |
800 | __u16 fid; | |
7ffec372 JL |
801 | struct cifsTconInfo *tcon; |
802 | struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); | |
97837582 | 803 | |
7ffec372 JL |
804 | if (IS_ERR(tlink)) |
805 | return PTR_ERR(tlink); | |
806 | ||
807 | tcon = tlink_tcon(tlink); | |
97837582 SF |
808 | xid = GetXid(); |
809 | ||
7ffec372 | 810 | rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, WRITE_DAC, 0, |
b96d31a6 CH |
811 | &fid, &oplock, NULL, cifs_sb->local_nls, |
812 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
813 | if (rc) { | |
b6b38f70 | 814 | cERROR(1, "Unable to open file to set ACL"); |
b96d31a6 | 815 | goto out; |
97837582 SF |
816 | } |
817 | ||
7ffec372 | 818 | rc = CIFSSMBSetCIFSACL(xid, tcon, fid, pnntsd, acllen); |
b6b38f70 | 819 | cFYI(DBG2, "SetCIFSACL rc = %d", rc); |
97837582 | 820 | |
7ffec372 JL |
821 | CIFSSMBClose(xid, tcon, fid); |
822 | out: | |
97837582 | 823 | FreeXid(xid); |
7ffec372 | 824 | cifs_put_tlink(tlink); |
b96d31a6 CH |
825 | return rc; |
826 | } | |
97837582 | 827 | |
b96d31a6 | 828 | /* Set an ACL on the server */ |
b73b9a4b | 829 | int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen, |
b96d31a6 CH |
830 | struct inode *inode, const char *path) |
831 | { | |
832 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
833 | struct cifsFileInfo *open_file; | |
834 | int rc; | |
835 | ||
b6b38f70 | 836 | cFYI(DBG2, "set ACL for %s from mode 0x%x", path, inode->i_mode); |
b96d31a6 | 837 | |
6508d904 | 838 | open_file = find_readable_file(CIFS_I(inode), true); |
b96d31a6 CH |
839 | if (!open_file) |
840 | return set_cifs_acl_by_path(cifs_sb, path, pnntsd, acllen); | |
841 | ||
842 | rc = set_cifs_acl_by_fid(cifs_sb, open_file->netfid, pnntsd, acllen); | |
6ab409b5 | 843 | cifsFileInfo_put(open_file); |
ef571cad | 844 | return rc; |
97837582 SF |
845 | } |
846 | ||
7505e052 | 847 | /* Translate the CIFS ACL (simlar to NTFS ACL) for a file into mode bits */ |
987b21d7 | 848 | int |
0b8f18e3 JL |
849 | cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, |
850 | struct inode *inode, const char *path, const __u16 *pfid) | |
7505e052 SF |
851 | { |
852 | struct cifs_ntsd *pntsd = NULL; | |
853 | u32 acllen = 0; | |
854 | int rc = 0; | |
855 | ||
b6b38f70 | 856 | cFYI(DBG2, "converting ACL to mode for %s", path); |
1bf4072d CH |
857 | |
858 | if (pfid) | |
859 | pntsd = get_cifs_acl_by_fid(cifs_sb, *pfid, &acllen); | |
860 | else | |
861 | pntsd = get_cifs_acl(cifs_sb, inode, path, &acllen); | |
7505e052 SF |
862 | |
863 | /* if we can retrieve the ACL, now parse Access Control Entries, ACEs */ | |
987b21d7 SP |
864 | if (IS_ERR(pntsd)) { |
865 | rc = PTR_ERR(pntsd); | |
866 | cERROR(1, "%s: error %d getting sec desc", __func__, rc); | |
867 | } else { | |
0b8f18e3 | 868 | rc = parse_sec_desc(pntsd, acllen, fattr); |
987b21d7 SP |
869 | kfree(pntsd); |
870 | if (rc) | |
871 | cERROR(1, "parse sec desc failed rc = %d", rc); | |
872 | } | |
7505e052 | 873 | |
987b21d7 | 874 | return rc; |
b9c7a2bb | 875 | } |
953f8681 | 876 | |
7505e052 | 877 | /* Convert mode bits to an ACL so we can update the ACL on the server */ |
78415d2d | 878 | int mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode) |
953f8681 SF |
879 | { |
880 | int rc = 0; | |
cce246ee | 881 | __u32 secdesclen = 0; |
97837582 SF |
882 | struct cifs_ntsd *pntsd = NULL; /* acl obtained from server */ |
883 | struct cifs_ntsd *pnntsd = NULL; /* modified acl to be sent to server */ | |
953f8681 | 884 | |
b6b38f70 | 885 | cFYI(DBG2, "set ACL from mode for %s", path); |
953f8681 SF |
886 | |
887 | /* Get the security descriptor */ | |
1bf4072d | 888 | pntsd = get_cifs_acl(CIFS_SB(inode->i_sb), inode, path, &secdesclen); |
953f8681 | 889 | |
97837582 SF |
890 | /* Add three ACEs for owner, group, everyone getting rid of |
891 | other ACEs as chmod disables ACEs and set the security descriptor */ | |
953f8681 | 892 | |
987b21d7 SP |
893 | if (IS_ERR(pntsd)) { |
894 | rc = PTR_ERR(pntsd); | |
895 | cERROR(1, "%s: error %d getting sec desc", __func__, rc); | |
896 | } else { | |
97837582 SF |
897 | /* allocate memory for the smb header, |
898 | set security descriptor request security descriptor | |
899 | parameters, and secuirty descriptor itself */ | |
953f8681 | 900 | |
cce246ee SF |
901 | secdesclen = secdesclen < DEFSECDESCLEN ? |
902 | DEFSECDESCLEN : secdesclen; | |
903 | pnntsd = kmalloc(secdesclen, GFP_KERNEL); | |
97837582 | 904 | if (!pnntsd) { |
b6b38f70 | 905 | cERROR(1, "Unable to allocate security descriptor"); |
97837582 | 906 | kfree(pntsd); |
ef571cad | 907 | return -ENOMEM; |
97837582 | 908 | } |
7505e052 | 909 | |
cce246ee | 910 | rc = build_sec_desc(pntsd, pnntsd, inode, nmode); |
97837582 | 911 | |
b6b38f70 | 912 | cFYI(DBG2, "build_sec_desc rc: %d", rc); |
97837582 SF |
913 | |
914 | if (!rc) { | |
915 | /* Set the security descriptor */ | |
cce246ee | 916 | rc = set_cifs_acl(pnntsd, secdesclen, inode, path); |
b6b38f70 | 917 | cFYI(DBG2, "set_cifs_acl rc: %d", rc); |
97837582 SF |
918 | } |
919 | ||
920 | kfree(pnntsd); | |
921 | kfree(pntsd); | |
922 | } | |
923 | ||
ef571cad | 924 | return rc; |
953f8681 | 925 | } |