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bcb02034 SF |
1 | /* |
2 | * fs/cifs/cifsacl.c | |
3 | * | |
4 | * Copyright (C) International Business Machines Corp., 2007 | |
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 SF |
24 | #include <linux/fs.h> |
25 | #include "cifspdu.h" | |
26 | #include "cifsglob.h" | |
d0d66c44 | 27 | #include "cifsacl.h" |
65874007 SF |
28 | #include "cifsproto.h" |
29 | #include "cifs_debug.h" | |
65874007 | 30 | |
297647c2 SF |
31 | |
32 | #ifdef CONFIG_CIFS_EXPERIMENTAL | |
33 | ||
af6f4612 | 34 | static struct cifs_wksid wksidarr[NUM_WK_SIDS] = { |
297647c2 SF |
35 | {{1, 0, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0} }, "null user"}, |
36 | {{1, 1, {0, 0, 0, 0, 0, 1}, {0, 0, 0, 0, 0} }, "nobody"}, | |
ce51ae14 DK |
37 | {{1, 1, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(11), 0, 0, 0, 0} }, "net-users"}, |
38 | {{1, 1, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(18), 0, 0, 0, 0} }, "sys"}, | |
39 | {{1, 2, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(32), cpu_to_le32(544), 0, 0, 0} }, "root"}, | |
40 | {{1, 2, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(32), cpu_to_le32(545), 0, 0, 0} }, "users"}, | |
44093ca2 SF |
41 | {{1, 2, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(32), cpu_to_le32(546), 0, 0, 0} }, "guest"} } |
42 | ; | |
297647c2 SF |
43 | |
44 | ||
bcb02034 | 45 | /* security id for everyone */ |
e01b6400 SP |
46 | static const struct cifs_sid sid_everyone = { |
47 | 1, 1, {0, 0, 0, 0, 0, 1}, {0} }; | |
bcb02034 SF |
48 | /* group users */ |
49 | static const struct cifs_sid sid_user = | |
d12fd121 | 50 | {1, 2 , {0, 0, 0, 0, 0, 5}, {} }; |
d0d66c44 | 51 | |
297647c2 SF |
52 | |
53 | int match_sid(struct cifs_sid *ctsid) | |
54 | { | |
55 | int i, j; | |
56 | int num_subauth, num_sat, num_saw; | |
57 | struct cifs_sid *cwsid; | |
58 | ||
59 | if (!ctsid) | |
60 | return (-1); | |
61 | ||
62 | for (i = 0; i < NUM_WK_SIDS; ++i) { | |
63 | cwsid = &(wksidarr[i].cifssid); | |
64 | ||
65 | /* compare the revision */ | |
66 | if (ctsid->revision != cwsid->revision) | |
67 | continue; | |
68 | ||
69 | /* compare all of the six auth values */ | |
70 | for (j = 0; j < 6; ++j) { | |
71 | if (ctsid->authority[j] != cwsid->authority[j]) | |
72 | break; | |
73 | } | |
74 | if (j < 6) | |
75 | continue; /* all of the auth values did not match */ | |
76 | ||
77 | /* compare all of the subauth values if any */ | |
ce51ae14 DK |
78 | num_sat = ctsid->num_subauth; |
79 | num_saw = cwsid->num_subauth; | |
297647c2 SF |
80 | num_subauth = num_sat < num_saw ? num_sat : num_saw; |
81 | if (num_subauth) { | |
82 | for (j = 0; j < num_subauth; ++j) { | |
83 | if (ctsid->sub_auth[j] != cwsid->sub_auth[j]) | |
84 | break; | |
85 | } | |
86 | if (j < num_subauth) | |
87 | continue; /* all sub_auth values do not match */ | |
88 | } | |
89 | ||
90 | cFYI(1, ("matching sid: %s\n", wksidarr[i].sidname)); | |
91 | return (0); /* sids compare/match */ | |
92 | } | |
93 | ||
94 | cFYI(1, ("No matching sid")); | |
95 | return (-1); | |
96 | } | |
97 | ||
a750e77c SF |
98 | /* if the two SIDs (roughly equivalent to a UUID for a user or group) are |
99 | the same returns 1, if they do not match returns 0 */ | |
630f3f0c | 100 | int compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid) |
297647c2 SF |
101 | { |
102 | int i; | |
103 | int num_subauth, num_sat, num_saw; | |
104 | ||
105 | if ((!ctsid) || (!cwsid)) | |
a750e77c | 106 | return (0); |
297647c2 SF |
107 | |
108 | /* compare the revision */ | |
109 | if (ctsid->revision != cwsid->revision) | |
a750e77c | 110 | return (0); |
297647c2 SF |
111 | |
112 | /* compare all of the six auth values */ | |
113 | for (i = 0; i < 6; ++i) { | |
114 | if (ctsid->authority[i] != cwsid->authority[i]) | |
a750e77c | 115 | return (0); |
297647c2 SF |
116 | } |
117 | ||
118 | /* compare all of the subauth values if any */ | |
adbc0358 | 119 | num_sat = ctsid->num_subauth; |
adddd49d | 120 | num_saw = cwsid->num_subauth; |
297647c2 SF |
121 | num_subauth = num_sat < num_saw ? num_sat : num_saw; |
122 | if (num_subauth) { | |
123 | for (i = 0; i < num_subauth; ++i) { | |
124 | if (ctsid->sub_auth[i] != cwsid->sub_auth[i]) | |
a750e77c | 125 | return (0); |
297647c2 SF |
126 | } |
127 | } | |
128 | ||
a750e77c | 129 | return (1); /* sids compare/match */ |
297647c2 SF |
130 | } |
131 | ||
630f3f0c SF |
132 | /* |
133 | change posix mode to reflect permissions | |
134 | pmode is the existing mode (we only want to overwrite part of this | |
135 | bits to set can be: S_IRWXU, S_IRWXG or S_IRWXO ie 00700 or 00070 or 00007 | |
136 | */ | |
15b03959 SF |
137 | static void access_flags_to_mode(__u32 ace_flags, int type, umode_t *pmode, |
138 | umode_t *pbits_to_set) | |
630f3f0c | 139 | { |
15b03959 SF |
140 | /* the order of ACEs is important. The canonical order is to begin with |
141 | DENY entries then follow with ALLOW, otherwise an allow entry could be | |
142 | encountered first, making the subsequent deny entry like "dead code" | |
143 | which would be superflous since Windows stops when a match is made | |
144 | for the operation you are trying to perform for your user */ | |
145 | ||
146 | /* For deny ACEs we change the mask so that subsequent allow access | |
147 | control entries do not turn on the bits we are denying */ | |
148 | if (type == ACCESS_DENIED) { | |
149 | if (ace_flags & GENERIC_ALL) { | |
150 | *pbits_to_set &= ~S_IRWXUGO; | |
151 | } | |
152 | if ((ace_flags & GENERIC_WRITE) || | |
153 | ((ace_flags & FILE_WRITE_RIGHTS) == FILE_WRITE_RIGHTS)) | |
154 | *pbits_to_set &= ~S_IWUGO; | |
155 | if ((ace_flags & GENERIC_READ) || | |
156 | ((ace_flags & FILE_READ_RIGHTS) == FILE_READ_RIGHTS)) | |
157 | *pbits_to_set &= ~S_IRUGO; | |
158 | if ((ace_flags & GENERIC_EXECUTE) || | |
159 | ((ace_flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS)) | |
160 | *pbits_to_set &= ~S_IXUGO; | |
161 | return; | |
162 | } else if (type != ACCESS_ALLOWED) { | |
163 | cERROR(1, ("unknown access control type %d", type)); | |
164 | return; | |
165 | } | |
166 | /* else ACCESS_ALLOWED type */ | |
630f3f0c | 167 | |
d61e5808 | 168 | if (ace_flags & GENERIC_ALL) { |
15b03959 | 169 | *pmode |= (S_IRWXUGO & (*pbits_to_set)); |
630f3f0c | 170 | #ifdef CONFIG_CIFS_DEBUG2 |
d61e5808 | 171 | cFYI(1, ("all perms")); |
630f3f0c | 172 | #endif |
d61e5808 SF |
173 | return; |
174 | } | |
e01b6400 SP |
175 | if ((ace_flags & GENERIC_WRITE) || |
176 | ((ace_flags & FILE_WRITE_RIGHTS) == FILE_WRITE_RIGHTS)) | |
15b03959 | 177 | *pmode |= (S_IWUGO & (*pbits_to_set)); |
e01b6400 SP |
178 | if ((ace_flags & GENERIC_READ) || |
179 | ((ace_flags & FILE_READ_RIGHTS) == FILE_READ_RIGHTS)) | |
15b03959 | 180 | *pmode |= (S_IRUGO & (*pbits_to_set)); |
e01b6400 SP |
181 | if ((ace_flags & GENERIC_EXECUTE) || |
182 | ((ace_flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS)) | |
15b03959 | 183 | *pmode |= (S_IXUGO & (*pbits_to_set)); |
630f3f0c | 184 | |
d61e5808 | 185 | #ifdef CONFIG_CIFS_DEBUG2 |
b9c7a2bb | 186 | cFYI(1, ("access flags 0x%x mode now 0x%x", ace_flags, *pmode)); |
d61e5808 | 187 | #endif |
630f3f0c SF |
188 | return; |
189 | } | |
190 | ||
297647c2 | 191 | |
953f8681 SF |
192 | #ifdef CONFIG_CIFS_DEBUG2 |
193 | static void dump_ace(struct cifs_ace *pace, char *end_of_acl) | |
d0d66c44 | 194 | { |
d0d66c44 | 195 | int num_subauth; |
d0d66c44 SP |
196 | |
197 | /* validate that we do not go past end of acl */ | |
297647c2 | 198 | |
44093ca2 SF |
199 | if (le16_to_cpu(pace->size) < 16) { |
200 | cERROR(1, ("ACE too small, %d", le16_to_cpu(pace->size))); | |
201 | return; | |
202 | } | |
203 | ||
204 | if (end_of_acl < (char *)pace + le16_to_cpu(pace->size)) { | |
d0d66c44 SP |
205 | cERROR(1, ("ACL too small to parse ACE")); |
206 | return; | |
44093ca2 | 207 | } |
d0d66c44 | 208 | |
44093ca2 | 209 | num_subauth = pace->sid.num_subauth; |
d0d66c44 | 210 | if (num_subauth) { |
8f18c131 | 211 | int i; |
44093ca2 SF |
212 | cFYI(1, ("ACE revision %d num_auth %d type %d flags %d size %d", |
213 | pace->sid.revision, pace->sid.num_subauth, pace->type, | |
214 | pace->flags, pace->size)); | |
d12fd121 SF |
215 | for (i = 0; i < num_subauth; ++i) { |
216 | cFYI(1, ("ACE sub_auth[%d]: 0x%x", i, | |
44093ca2 | 217 | le32_to_cpu(pace->sid.sub_auth[i]))); |
d12fd121 SF |
218 | } |
219 | ||
220 | /* BB add length check to make sure that we do not have huge | |
221 | num auths and therefore go off the end */ | |
d12fd121 SF |
222 | } |
223 | ||
224 | return; | |
225 | } | |
953f8681 | 226 | #endif |
d12fd121 | 227 | |
d0d66c44 | 228 | |
a750e77c | 229 | static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, |
d61e5808 | 230 | struct cifs_sid *pownersid, struct cifs_sid *pgrpsid, |
630f3f0c | 231 | struct inode *inode) |
d0d66c44 SP |
232 | { |
233 | int i; | |
234 | int num_aces = 0; | |
235 | int acl_size; | |
236 | char *acl_base; | |
d0d66c44 SP |
237 | struct cifs_ace **ppace; |
238 | ||
239 | /* BB need to add parm so we can store the SID BB */ | |
240 | ||
241 | /* validate that we do not go past end of acl */ | |
af6f4612 | 242 | if (end_of_acl < (char *)pdacl + le16_to_cpu(pdacl->size)) { |
d0d66c44 SP |
243 | cERROR(1, ("ACL too small to parse DACL")); |
244 | return; | |
245 | } | |
246 | ||
247 | #ifdef CONFIG_CIFS_DEBUG2 | |
248 | cFYI(1, ("DACL revision %d size %d num aces %d", | |
af6f4612 SF |
249 | le16_to_cpu(pdacl->revision), le16_to_cpu(pdacl->size), |
250 | le32_to_cpu(pdacl->num_aces))); | |
d0d66c44 SP |
251 | #endif |
252 | ||
7505e052 SF |
253 | /* reset rwx permissions for user/group/other. |
254 | Also, if num_aces is 0 i.e. DACL has no ACEs, | |
255 | user/group/other have no permissions */ | |
256 | inode->i_mode &= ~(S_IRWXUGO); | |
257 | ||
258 | if (!pdacl) { | |
259 | /* no DACL in the security descriptor, set | |
260 | all the permissions for user/group/other */ | |
261 | inode->i_mode |= S_IRWXUGO; | |
262 | return; | |
263 | } | |
d0d66c44 SP |
264 | acl_base = (char *)pdacl; |
265 | acl_size = sizeof(struct cifs_acl); | |
266 | ||
adbc0358 | 267 | num_aces = le32_to_cpu(pdacl->num_aces); |
d0d66c44 | 268 | if (num_aces > 0) { |
15b03959 SF |
269 | umode_t user_mask = S_IRWXU; |
270 | umode_t group_mask = S_IRWXG; | |
271 | umode_t other_mask = S_IRWXO; | |
272 | ||
d0d66c44 SP |
273 | ppace = kmalloc(num_aces * sizeof(struct cifs_ace *), |
274 | GFP_KERNEL); | |
275 | ||
d12fd121 | 276 | /* cifscred->cecount = pdacl->num_aces; |
d12fd121 SF |
277 | cifscred->aces = kmalloc(num_aces * |
278 | sizeof(struct cifs_ace *), GFP_KERNEL);*/ | |
d0d66c44 | 279 | |
d0d66c44 | 280 | for (i = 0; i < num_aces; ++i) { |
44093ca2 | 281 | ppace[i] = (struct cifs_ace *) (acl_base + acl_size); |
953f8681 SF |
282 | #ifdef CONFIG_CIFS_DEBUG2 |
283 | dump_ace(ppace[i], end_of_acl); | |
284 | #endif | |
e01b6400 SP |
285 | if (compare_sids(&(ppace[i]->sid), pownersid)) |
286 | access_flags_to_mode(ppace[i]->access_req, | |
15b03959 SF |
287 | ppace[i]->type, |
288 | &(inode->i_mode), | |
289 | &user_mask); | |
e01b6400 SP |
290 | if (compare_sids(&(ppace[i]->sid), pgrpsid)) |
291 | access_flags_to_mode(ppace[i]->access_req, | |
15b03959 SF |
292 | ppace[i]->type, |
293 | &(inode->i_mode), | |
294 | &group_mask); | |
e01b6400 SP |
295 | if (compare_sids(&(ppace[i]->sid), &sid_everyone)) |
296 | access_flags_to_mode(ppace[i]->access_req, | |
15b03959 SF |
297 | ppace[i]->type, |
298 | &(inode->i_mode), | |
299 | &other_mask); | |
e01b6400 | 300 | |
44093ca2 | 301 | /* memcpy((void *)(&(cifscred->aces[i])), |
d12fd121 SF |
302 | (void *)ppace[i], |
303 | sizeof(struct cifs_ace)); */ | |
d0d66c44 | 304 | |
44093ca2 SF |
305 | acl_base = (char *)ppace[i]; |
306 | acl_size = le16_to_cpu(ppace[i]->size); | |
d0d66c44 SP |
307 | } |
308 | ||
309 | kfree(ppace); | |
d0d66c44 SP |
310 | } |
311 | ||
312 | return; | |
313 | } | |
314 | ||
bcb02034 SF |
315 | |
316 | static int parse_sid(struct cifs_sid *psid, char *end_of_acl) | |
317 | { | |
318 | /* BB need to add parm so we can store the SID BB */ | |
319 | ||
b9c7a2bb SF |
320 | /* validate that we do not go past end of ACL - sid must be at least 8 |
321 | bytes long (assuming no sub-auths - e.g. the null SID */ | |
322 | if (end_of_acl < (char *)psid + 8) { | |
323 | cERROR(1, ("ACL too small to parse SID %p", psid)); | |
bcb02034 SF |
324 | return -EINVAL; |
325 | } | |
d0d66c44 | 326 | |
af6f4612 | 327 | if (psid->num_subauth) { |
bcb02034 | 328 | #ifdef CONFIG_CIFS_DEBUG2 |
8f18c131 | 329 | int i; |
44093ca2 SF |
330 | cFYI(1, ("SID revision %d num_auth %d", |
331 | psid->revision, psid->num_subauth)); | |
bcb02034 | 332 | |
af6f4612 | 333 | for (i = 0; i < psid->num_subauth; i++) { |
d0d66c44 | 334 | cFYI(1, ("SID sub_auth[%d]: 0x%x ", i, |
297647c2 | 335 | le32_to_cpu(psid->sub_auth[i]))); |
d0d66c44 SP |
336 | } |
337 | ||
d12fd121 | 338 | /* BB add length check to make sure that we do not have huge |
d0d66c44 | 339 | num auths and therefore go off the end */ |
d12fd121 | 340 | cFYI(1, ("RID 0x%x", |
af6f4612 | 341 | le32_to_cpu(psid->sub_auth[psid->num_subauth-1]))); |
bcb02034 | 342 | #endif |
d0d66c44 SP |
343 | } |
344 | ||
bcb02034 SF |
345 | return 0; |
346 | } | |
347 | ||
d0d66c44 | 348 | |
bcb02034 | 349 | /* Convert CIFS ACL to POSIX form */ |
630f3f0c SF |
350 | static int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len, |
351 | struct inode *inode) | |
bcb02034 | 352 | { |
d0d66c44 | 353 | int rc; |
bcb02034 SF |
354 | struct cifs_sid *owner_sid_ptr, *group_sid_ptr; |
355 | struct cifs_acl *dacl_ptr; /* no need for SACL ptr */ | |
bcb02034 | 356 | char *end_of_acl = ((char *)pntsd) + acl_len; |
7505e052 | 357 | __u32 dacloffset; |
bcb02034 | 358 | |
b9c7a2bb SF |
359 | if ((inode == NULL) || (pntsd == NULL)) |
360 | return -EIO; | |
361 | ||
bcb02034 | 362 | owner_sid_ptr = (struct cifs_sid *)((char *)pntsd + |
af6f4612 | 363 | le32_to_cpu(pntsd->osidoffset)); |
bcb02034 | 364 | group_sid_ptr = (struct cifs_sid *)((char *)pntsd + |
af6f4612 | 365 | le32_to_cpu(pntsd->gsidoffset)); |
7505e052 | 366 | dacloffset = le32_to_cpu(pntsd->dacloffset); |
63d2583f | 367 | dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset); |
bcb02034 SF |
368 | #ifdef CONFIG_CIFS_DEBUG2 |
369 | cFYI(1, ("revision %d type 0x%x ooffset 0x%x goffset 0x%x " | |
370 | "sacloffset 0x%x dacloffset 0x%x", | |
af6f4612 SF |
371 | pntsd->revision, pntsd->type, le32_to_cpu(pntsd->osidoffset), |
372 | le32_to_cpu(pntsd->gsidoffset), | |
7505e052 | 373 | le32_to_cpu(pntsd->sacloffset), dacloffset)); |
bcb02034 | 374 | #endif |
b9c7a2bb | 375 | /* cifs_dump_mem("owner_sid: ", owner_sid_ptr, 64); */ |
bcb02034 SF |
376 | rc = parse_sid(owner_sid_ptr, end_of_acl); |
377 | if (rc) | |
378 | return rc; | |
379 | ||
380 | rc = parse_sid(group_sid_ptr, end_of_acl); | |
381 | if (rc) | |
382 | return rc; | |
383 | ||
7505e052 SF |
384 | if (dacloffset) |
385 | parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr, | |
63d2583f | 386 | group_sid_ptr, inode); |
7505e052 SF |
387 | else |
388 | cFYI(1, ("no ACL")); /* BB grant all or default perms? */ | |
d0d66c44 | 389 | |
bcb02034 SF |
390 | /* cifscred->uid = owner_sid_ptr->rid; |
391 | cifscred->gid = group_sid_ptr->rid; | |
392 | memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr, | |
630f3f0c | 393 | sizeof(struct cifs_sid)); |
bcb02034 | 394 | memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr, |
630f3f0c | 395 | sizeof(struct cifs_sid)); */ |
bcb02034 | 396 | |
297647c2 | 397 | |
bcb02034 SF |
398 | return (0); |
399 | } | |
b9c7a2bb SF |
400 | |
401 | ||
7505e052 SF |
402 | /* Retrieve an ACL from the server */ |
403 | static struct cifs_ntsd *get_cifs_acl(u32 *pacllen, struct inode *inode, | |
404 | const char *path) | |
b9c7a2bb SF |
405 | { |
406 | struct cifsFileInfo *open_file; | |
407 | int unlock_file = FALSE; | |
408 | int xid; | |
409 | int rc = -EIO; | |
410 | __u16 fid; | |
411 | struct super_block *sb; | |
412 | struct cifs_sb_info *cifs_sb; | |
413 | struct cifs_ntsd *pntsd = NULL; | |
b9c7a2bb SF |
414 | |
415 | cFYI(1, ("get mode from ACL for %s", path)); | |
416 | ||
417 | if (inode == NULL) | |
7505e052 | 418 | return NULL; |
b9c7a2bb SF |
419 | |
420 | xid = GetXid(); | |
421 | open_file = find_readable_file(CIFS_I(inode)); | |
422 | sb = inode->i_sb; | |
423 | if (sb == NULL) { | |
424 | FreeXid(xid); | |
7505e052 | 425 | return NULL; |
b9c7a2bb SF |
426 | } |
427 | cifs_sb = CIFS_SB(sb); | |
428 | ||
429 | if (open_file) { | |
430 | unlock_file = TRUE; | |
431 | fid = open_file->netfid; | |
432 | } else { | |
433 | int oplock = FALSE; | |
434 | /* open file */ | |
435 | rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN, | |
953f8681 | 436 | READ_CONTROL, 0, &fid, &oplock, NULL, |
b9c7a2bb SF |
437 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
438 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
439 | if (rc != 0) { | |
440 | cERROR(1, ("Unable to open file to get ACL")); | |
441 | FreeXid(xid); | |
7505e052 | 442 | return NULL; |
b9c7a2bb SF |
443 | } |
444 | } | |
445 | ||
7505e052 SF |
446 | rc = CIFSSMBGetCIFSACL(xid, cifs_sb->tcon, fid, &pntsd, pacllen); |
447 | cFYI(1, ("GetCIFSACL rc = %d ACL len %d", rc, *pacllen)); | |
b9c7a2bb SF |
448 | if (unlock_file == TRUE) |
449 | atomic_dec(&open_file->wrtPending); | |
450 | else | |
451 | CIFSSMBClose(xid, cifs_sb->tcon, fid); | |
452 | ||
7505e052 SF |
453 | FreeXid(xid); |
454 | return pntsd; | |
455 | } | |
456 | ||
457 | /* Translate the CIFS ACL (simlar to NTFS ACL) for a file into mode bits */ | |
458 | void acl_to_uid_mode(struct inode *inode, const char *path) | |
459 | { | |
460 | struct cifs_ntsd *pntsd = NULL; | |
461 | u32 acllen = 0; | |
462 | int rc = 0; | |
463 | ||
464 | #ifdef CONFIG_CIFS_DEBUG2 | |
465 | cFYI(1, ("converting ACL to mode for %s", path)); | |
466 | #endif | |
467 | pntsd = get_cifs_acl(&acllen, inode, path); | |
468 | ||
469 | /* if we can retrieve the ACL, now parse Access Control Entries, ACEs */ | |
470 | if (pntsd) | |
b9c7a2bb | 471 | rc = parse_sec_desc(pntsd, acllen, inode); |
7505e052 SF |
472 | if (rc) |
473 | cFYI(1, ("parse sec desc failed rc = %d", rc)); | |
474 | ||
b9c7a2bb | 475 | kfree(pntsd); |
b9c7a2bb SF |
476 | return; |
477 | } | |
953f8681 | 478 | |
7505e052 | 479 | /* Convert mode bits to an ACL so we can update the ACL on the server */ |
953f8681 SF |
480 | int mode_to_acl(struct inode *inode, const char *path) |
481 | { | |
482 | int rc = 0; | |
483 | __u32 acllen = 0; | |
484 | struct cifs_ntsd *pntsd = NULL; | |
485 | ||
486 | cFYI(1, ("set ACL from mode for %s", path)); | |
487 | ||
488 | /* Get the security descriptor */ | |
7505e052 | 489 | pntsd = get_cifs_acl(&acllen, inode, path); |
953f8681 | 490 | |
7505e052 SF |
491 | /* Add/Modify the three ACEs for owner, group, everyone |
492 | while retaining the other ACEs */ | |
953f8681 SF |
493 | |
494 | /* Set the security descriptor */ | |
953f8681 | 495 | |
7505e052 SF |
496 | |
497 | kfree(pntsd); | |
953f8681 SF |
498 | return rc; |
499 | } | |
297647c2 | 500 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |