Commit | Line | Data |
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929be906 | 1 | // SPDX-License-Identifier: LGPL-2.1 |
bcb02034 | 2 | /* |
bcb02034 | 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 | * | |
bcb02034 SF |
9 | */ |
10 | ||
65874007 | 11 | #include <linux/fs.h> |
5a0e3ad6 | 12 | #include <linux/slab.h> |
4d79dba0 SP |
13 | #include <linux/string.h> |
14 | #include <linux/keyctl.h> | |
15 | #include <linux/key-type.h> | |
bd9684b0 | 16 | #include <uapi/linux/posix_acl.h> |
dc1af4c4 CB |
17 | #include <linux/posix_acl.h> |
18 | #include <linux/posix_acl_xattr.h> | |
4d79dba0 | 19 | #include <keys/user-type.h> |
65874007 SF |
20 | #include "cifspdu.h" |
21 | #include "cifsglob.h" | |
d0d66c44 | 22 | #include "cifsacl.h" |
65874007 SF |
23 | #include "cifsproto.h" |
24 | #include "cifs_debug.h" | |
8401e936 | 25 | #include "fs_context.h" |
bd9684b0 CB |
26 | #include "cifs_fs_sb.h" |
27 | #include "cifs_unicode.h" | |
65874007 | 28 | |
2fbc2f17 | 29 | /* security id for everyone/world system group */ |
e01b6400 SP |
30 | static const struct cifs_sid sid_everyone = { |
31 | 1, 1, {0, 0, 0, 0, 0, 1}, {0} }; | |
2fbc2f17 SP |
32 | /* security id for Authenticated Users system group */ |
33 | static const struct cifs_sid sid_authusers = { | |
bc09d141 | 34 | 1, 1, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(11)} }; |
d0d66c44 | 35 | |
3514de3f SF |
36 | /* S-1-22-1 Unmapped Unix users */ |
37 | static const struct cifs_sid sid_unix_users = {1, 1, {0, 0, 0, 0, 0, 22}, | |
38 | {cpu_to_le32(1), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }; | |
39 | ||
40 | /* S-1-22-2 Unmapped Unix groups */ | |
41 | static const struct cifs_sid sid_unix_groups = { 1, 1, {0, 0, 0, 0, 0, 22}, | |
42 | {cpu_to_le32(2), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }; | |
43 | ||
44 | /* | |
cba22b1c | 45 | * See https://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx |
3514de3f SF |
46 | */ |
47 | ||
48 | /* S-1-5-88 MS NFS and Apple style UID/GID/mode */ | |
49 | ||
50 | /* S-1-5-88-1 Unix uid */ | |
51 | static const struct cifs_sid sid_unix_NFS_users = { 1, 2, {0, 0, 0, 0, 0, 5}, | |
52 | {cpu_to_le32(88), | |
53 | cpu_to_le32(1), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }; | |
54 | ||
55 | /* S-1-5-88-2 Unix gid */ | |
56 | static const struct cifs_sid sid_unix_NFS_groups = { 1, 2, {0, 0, 0, 0, 0, 5}, | |
57 | {cpu_to_le32(88), | |
58 | cpu_to_le32(2), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }; | |
59 | ||
60 | /* S-1-5-88-3 Unix mode */ | |
61 | static const struct cifs_sid sid_unix_NFS_mode = { 1, 2, {0, 0, 0, 0, 0, 5}, | |
62 | {cpu_to_le32(88), | |
63 | cpu_to_le32(3), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }; | |
64 | ||
b1a6dc21 | 65 | static const struct cred *root_cred; |
9409ae58 | 66 | |
4d79dba0 | 67 | static int |
cf7f601c | 68 | cifs_idmap_key_instantiate(struct key *key, struct key_preparsed_payload *prep) |
4d79dba0 SP |
69 | { |
70 | char *payload; | |
71 | ||
41a9f1f6 JL |
72 | /* |
73 | * If the payload is less than or equal to the size of a pointer, then | |
74 | * an allocation here is wasteful. Just copy the data directly to the | |
75 | * payload.value union member instead. | |
76 | * | |
77 | * With this however, you must check the datalen before trying to | |
78 | * dereference payload.data! | |
79 | */ | |
1f630680 | 80 | if (prep->datalen <= sizeof(key->payload)) { |
146aa8b1 DH |
81 | key->payload.data[0] = NULL; |
82 | memcpy(&key->payload, prep->data, prep->datalen); | |
83 | } else { | |
84 | payload = kmemdup(prep->data, prep->datalen, GFP_KERNEL); | |
85 | if (!payload) | |
86 | return -ENOMEM; | |
87 | key->payload.data[0] = payload; | |
41a9f1f6 | 88 | } |
4d79dba0 | 89 | |
cf7f601c | 90 | key->datalen = prep->datalen; |
4d79dba0 SP |
91 | return 0; |
92 | } | |
93 | ||
94 | static inline void | |
95 | cifs_idmap_key_destroy(struct key *key) | |
96 | { | |
1f630680 | 97 | if (key->datalen > sizeof(key->payload)) |
146aa8b1 | 98 | kfree(key->payload.data[0]); |
4d79dba0 SP |
99 | } |
100 | ||
b1a6dc21 | 101 | static struct key_type cifs_idmap_key_type = { |
c4aca0c0 | 102 | .name = "cifs.idmap", |
4d79dba0 SP |
103 | .instantiate = cifs_idmap_key_instantiate, |
104 | .destroy = cifs_idmap_key_destroy, | |
105 | .describe = user_describe, | |
4d79dba0 SP |
106 | }; |
107 | ||
faa65f07 JL |
108 | static char * |
109 | sid_to_key_str(struct cifs_sid *sidptr, unsigned int type) | |
9409ae58 | 110 | { |
faa65f07 | 111 | int i, len; |
ee13b2ba | 112 | unsigned int saval; |
faa65f07 | 113 | char *sidstr, *strptr; |
193cdd8a | 114 | unsigned long long id_auth_val; |
9409ae58 | 115 | |
faa65f07 JL |
116 | /* 3 bytes for prefix */ |
117 | sidstr = kmalloc(3 + SID_STRING_BASE_SIZE + | |
118 | (SID_STRING_SUBAUTH_SIZE * sidptr->num_subauth), | |
119 | GFP_KERNEL); | |
120 | if (!sidstr) | |
121 | return sidstr; | |
9409ae58 | 122 | |
faa65f07 JL |
123 | strptr = sidstr; |
124 | len = sprintf(strptr, "%cs:S-%hhu", type == SIDOWNER ? 'o' : 'g', | |
125 | sidptr->revision); | |
126 | strptr += len; | |
9409ae58 | 127 | |
193cdd8a JL |
128 | /* The authority field is a single 48-bit number */ |
129 | id_auth_val = (unsigned long long)sidptr->authority[5]; | |
130 | id_auth_val |= (unsigned long long)sidptr->authority[4] << 8; | |
131 | id_auth_val |= (unsigned long long)sidptr->authority[3] << 16; | |
132 | id_auth_val |= (unsigned long long)sidptr->authority[2] << 24; | |
133 | id_auth_val |= (unsigned long long)sidptr->authority[1] << 32; | |
134 | id_auth_val |= (unsigned long long)sidptr->authority[0] << 48; | |
135 | ||
136 | /* | |
137 | * MS-DTYP states that if the authority is >= 2^32, then it should be | |
138 | * expressed as a hex value. | |
139 | */ | |
140 | if (id_auth_val <= UINT_MAX) | |
141 | len = sprintf(strptr, "-%llu", id_auth_val); | |
142 | else | |
143 | len = sprintf(strptr, "-0x%llx", id_auth_val); | |
144 | ||
145 | strptr += len; | |
9409ae58 SP |
146 | |
147 | for (i = 0; i < sidptr->num_subauth; ++i) { | |
148 | saval = le32_to_cpu(sidptr->sub_auth[i]); | |
faa65f07 JL |
149 | len = sprintf(strptr, "-%u", saval); |
150 | strptr += len; | |
9409ae58 | 151 | } |
faa65f07 JL |
152 | |
153 | return sidstr; | |
9409ae58 SP |
154 | } |
155 | ||
436bb435 JL |
156 | /* |
157 | * if the two SIDs (roughly equivalent to a UUID for a user or group) are | |
158 | * the same returns zero, if they do not match returns non-zero. | |
159 | */ | |
160 | static int | |
161 | compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid) | |
162 | { | |
163 | int i; | |
164 | int num_subauth, num_sat, num_saw; | |
165 | ||
166 | if ((!ctsid) || (!cwsid)) | |
167 | return 1; | |
168 | ||
169 | /* compare the revision */ | |
170 | if (ctsid->revision != cwsid->revision) { | |
171 | if (ctsid->revision > cwsid->revision) | |
172 | return 1; | |
173 | else | |
174 | return -1; | |
175 | } | |
176 | ||
177 | /* compare all of the six auth values */ | |
178 | for (i = 0; i < NUM_AUTHS; ++i) { | |
179 | if (ctsid->authority[i] != cwsid->authority[i]) { | |
180 | if (ctsid->authority[i] > cwsid->authority[i]) | |
181 | return 1; | |
182 | else | |
183 | return -1; | |
184 | } | |
185 | } | |
186 | ||
187 | /* compare all of the subauth values if any */ | |
188 | num_sat = ctsid->num_subauth; | |
189 | num_saw = cwsid->num_subauth; | |
190 | num_subauth = num_sat < num_saw ? num_sat : num_saw; | |
191 | if (num_subauth) { | |
192 | for (i = 0; i < num_subauth; ++i) { | |
193 | if (ctsid->sub_auth[i] != cwsid->sub_auth[i]) { | |
194 | if (le32_to_cpu(ctsid->sub_auth[i]) > | |
195 | le32_to_cpu(cwsid->sub_auth[i])) | |
196 | return 1; | |
197 | else | |
198 | return -1; | |
199 | } | |
200 | } | |
201 | } | |
202 | ||
203 | return 0; /* sids compare/match */ | |
204 | } | |
205 | ||
3514de3f SF |
206 | static bool |
207 | is_well_known_sid(const struct cifs_sid *psid, uint32_t *puid, bool is_group) | |
208 | { | |
209 | int i; | |
210 | int num_subauth; | |
211 | const struct cifs_sid *pwell_known_sid; | |
212 | ||
213 | if (!psid || (puid == NULL)) | |
214 | return false; | |
215 | ||
216 | num_subauth = psid->num_subauth; | |
217 | ||
218 | /* check if Mac (or Windows NFS) vs. Samba format for Unix owner SID */ | |
219 | if (num_subauth == 2) { | |
220 | if (is_group) | |
221 | pwell_known_sid = &sid_unix_groups; | |
222 | else | |
223 | pwell_known_sid = &sid_unix_users; | |
224 | } else if (num_subauth == 3) { | |
225 | if (is_group) | |
226 | pwell_known_sid = &sid_unix_NFS_groups; | |
227 | else | |
228 | pwell_known_sid = &sid_unix_NFS_users; | |
229 | } else | |
230 | return false; | |
231 | ||
232 | /* compare the revision */ | |
233 | if (psid->revision != pwell_known_sid->revision) | |
234 | return false; | |
235 | ||
236 | /* compare all of the six auth values */ | |
237 | for (i = 0; i < NUM_AUTHS; ++i) { | |
238 | if (psid->authority[i] != pwell_known_sid->authority[i]) { | |
239 | cifs_dbg(FYI, "auth %d did not match\n", i); | |
240 | return false; | |
241 | } | |
242 | } | |
243 | ||
244 | if (num_subauth == 2) { | |
245 | if (psid->sub_auth[0] != pwell_known_sid->sub_auth[0]) | |
246 | return false; | |
247 | ||
248 | *puid = le32_to_cpu(psid->sub_auth[1]); | |
249 | } else /* 3 subauths, ie Windows/Mac style */ { | |
250 | *puid = le32_to_cpu(psid->sub_auth[0]); | |
251 | if ((psid->sub_auth[0] != pwell_known_sid->sub_auth[0]) || | |
252 | (psid->sub_auth[1] != pwell_known_sid->sub_auth[1])) | |
253 | return false; | |
254 | ||
255 | *puid = le32_to_cpu(psid->sub_auth[2]); | |
256 | } | |
257 | ||
258 | cifs_dbg(FYI, "Unix UID %d returned from SID\n", *puid); | |
259 | return true; /* well known sid found, uid returned */ | |
260 | } | |
261 | ||
f5065508 | 262 | static __u16 |
36960e44 JL |
263 | cifs_copy_sid(struct cifs_sid *dst, const struct cifs_sid *src) |
264 | { | |
36f87ee7 | 265 | int i; |
f5065508 | 266 | __u16 size = 1 + 1 + 6; |
36f87ee7 JL |
267 | |
268 | dst->revision = src->revision; | |
30c9d6cc | 269 | dst->num_subauth = min_t(u8, src->num_subauth, SID_MAX_SUB_AUTHORITIES); |
36f87ee7 JL |
270 | for (i = 0; i < NUM_AUTHS; ++i) |
271 | dst->authority[i] = src->authority[i]; | |
272 | for (i = 0; i < dst->num_subauth; ++i) | |
273 | dst->sub_auth[i] = src->sub_auth[i]; | |
f5065508 SP |
274 | size += (dst->num_subauth * 4); |
275 | ||
276 | return size; | |
36960e44 JL |
277 | } |
278 | ||
9409ae58 | 279 | static int |
faa65f07 | 280 | id_to_sid(unsigned int cid, uint sidtype, struct cifs_sid *ssid) |
9409ae58 | 281 | { |
faa65f07 | 282 | int rc; |
21fed0d5 | 283 | struct key *sidkey; |
2ae03025 JL |
284 | struct cifs_sid *ksid; |
285 | unsigned int ksid_size; | |
faa65f07 | 286 | char desc[3 + 10 + 1]; /* 3 byte prefix + 10 bytes for value + NULL */ |
21fed0d5 | 287 | const struct cred *saved_cred; |
21fed0d5 | 288 | |
faa65f07 JL |
289 | rc = snprintf(desc, sizeof(desc), "%ci:%u", |
290 | sidtype == SIDOWNER ? 'o' : 'g', cid); | |
291 | if (rc >= sizeof(desc)) | |
292 | return -EINVAL; | |
21fed0d5 | 293 | |
faa65f07 JL |
294 | rc = 0; |
295 | saved_cred = override_creds(root_cred); | |
028db3e2 | 296 | sidkey = request_key(&cifs_idmap_key_type, desc, ""); |
faa65f07 | 297 | if (IS_ERR(sidkey)) { |
21fed0d5 | 298 | rc = -EINVAL; |
f96637be JP |
299 | cifs_dbg(FYI, "%s: Can't map %cid %u to a SID\n", |
300 | __func__, sidtype == SIDOWNER ? 'u' : 'g', cid); | |
faa65f07 JL |
301 | goto out_revert_creds; |
302 | } else if (sidkey->datalen < CIFS_SID_BASE_SIZE) { | |
303 | rc = -EIO; | |
f96637be JP |
304 | cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu)\n", |
305 | __func__, sidkey->datalen); | |
2ae03025 | 306 | goto invalidate_key; |
21fed0d5 | 307 | } |
2ae03025 | 308 | |
1f630680 JL |
309 | /* |
310 | * A sid is usually too large to be embedded in payload.value, but if | |
311 | * there are no subauthorities and the host has 8-byte pointers, then | |
312 | * it could be. | |
313 | */ | |
314 | ksid = sidkey->datalen <= sizeof(sidkey->payload) ? | |
146aa8b1 DH |
315 | (struct cifs_sid *)&sidkey->payload : |
316 | (struct cifs_sid *)sidkey->payload.data[0]; | |
1f630680 | 317 | |
2ae03025 JL |
318 | ksid_size = CIFS_SID_BASE_SIZE + (ksid->num_subauth * sizeof(__le32)); |
319 | if (ksid_size > sidkey->datalen) { | |
320 | rc = -EIO; | |
f96637be JP |
321 | cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu, ksid_size=%u)\n", |
322 | __func__, sidkey->datalen, ksid_size); | |
2ae03025 JL |
323 | goto invalidate_key; |
324 | } | |
1f630680 | 325 | |
2ae03025 | 326 | cifs_copy_sid(ssid, ksid); |
faa65f07 JL |
327 | out_key_put: |
328 | key_put(sidkey); | |
329 | out_revert_creds: | |
330 | revert_creds(saved_cred); | |
21fed0d5 | 331 | return rc; |
2ae03025 JL |
332 | |
333 | invalidate_key: | |
334 | key_invalidate(sidkey); | |
335 | goto out_key_put; | |
21fed0d5 SP |
336 | } |
337 | ||
9934430e | 338 | int |
9409ae58 SP |
339 | sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid, |
340 | struct cifs_fattr *fattr, uint sidtype) | |
341 | { | |
f2d67931 | 342 | int rc = 0; |
faa65f07 JL |
343 | struct key *sidkey; |
344 | char *sidstr; | |
9409ae58 | 345 | const struct cred *saved_cred; |
8401e936 RS |
346 | kuid_t fuid = cifs_sb->ctx->linux_uid; |
347 | kgid_t fgid = cifs_sb->ctx->linux_gid; | |
9409ae58 SP |
348 | |
349 | /* | |
faa65f07 JL |
350 | * If we have too many subauthorities, then something is really wrong. |
351 | * Just return an error. | |
9409ae58 | 352 | */ |
faa65f07 | 353 | if (unlikely(psid->num_subauth > SID_MAX_SUB_AUTHORITIES)) { |
f96637be JP |
354 | cifs_dbg(FYI, "%s: %u subauthorities is too many!\n", |
355 | __func__, psid->num_subauth); | |
faa65f07 | 356 | return -EIO; |
9409ae58 SP |
357 | } |
358 | ||
9934430e SF |
359 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) || |
360 | (cifs_sb_master_tcon(cifs_sb)->posix_extensions)) { | |
3514de3f SF |
361 | uint32_t unix_id; |
362 | bool is_group; | |
363 | ||
364 | if (sidtype != SIDOWNER) | |
365 | is_group = true; | |
366 | else | |
367 | is_group = false; | |
368 | ||
369 | if (is_well_known_sid(psid, &unix_id, is_group) == false) | |
370 | goto try_upcall_to_get_id; | |
371 | ||
372 | if (is_group) { | |
373 | kgid_t gid; | |
374 | gid_t id; | |
375 | ||
376 | id = (gid_t)unix_id; | |
377 | gid = make_kgid(&init_user_ns, id); | |
378 | if (gid_valid(gid)) { | |
379 | fgid = gid; | |
380 | goto got_valid_id; | |
381 | } | |
382 | } else { | |
383 | kuid_t uid; | |
384 | uid_t id; | |
385 | ||
386 | id = (uid_t)unix_id; | |
387 | uid = make_kuid(&init_user_ns, id); | |
388 | if (uid_valid(uid)) { | |
389 | fuid = uid; | |
390 | goto got_valid_id; | |
391 | } | |
392 | } | |
393 | /* If unable to find uid/gid easily from SID try via upcall */ | |
394 | } | |
395 | ||
396 | try_upcall_to_get_id: | |
faa65f07 JL |
397 | sidstr = sid_to_key_str(psid, sidtype); |
398 | if (!sidstr) | |
399 | return -ENOMEM; | |
400 | ||
401 | saved_cred = override_creds(root_cred); | |
028db3e2 | 402 | sidkey = request_key(&cifs_idmap_key_type, sidstr, ""); |
faa65f07 | 403 | if (IS_ERR(sidkey)) { |
f96637be JP |
404 | cifs_dbg(FYI, "%s: Can't map SID %s to a %cid\n", |
405 | __func__, sidstr, sidtype == SIDOWNER ? 'u' : 'g'); | |
faa65f07 JL |
406 | goto out_revert_creds; |
407 | } | |
408 | ||
409 | /* | |
410 | * FIXME: Here we assume that uid_t and gid_t are same size. It's | |
411 | * probably a safe assumption but might be better to check based on | |
412 | * sidtype. | |
413 | */ | |
355958f2 | 414 | BUILD_BUG_ON(sizeof(uid_t) != sizeof(gid_t)); |
41a9f1f6 | 415 | if (sidkey->datalen != sizeof(uid_t)) { |
f96637be JP |
416 | cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu)\n", |
417 | __func__, sidkey->datalen); | |
2ae03025 | 418 | key_invalidate(sidkey); |
faa65f07 | 419 | goto out_key_put; |
9409ae58 SP |
420 | } |
421 | ||
8abf2775 EB |
422 | if (sidtype == SIDOWNER) { |
423 | kuid_t uid; | |
424 | uid_t id; | |
146aa8b1 | 425 | memcpy(&id, &sidkey->payload.data[0], sizeof(uid_t)); |
8abf2775 EB |
426 | uid = make_kuid(&init_user_ns, id); |
427 | if (uid_valid(uid)) | |
428 | fuid = uid; | |
429 | } else { | |
430 | kgid_t gid; | |
431 | gid_t id; | |
146aa8b1 | 432 | memcpy(&id, &sidkey->payload.data[0], sizeof(gid_t)); |
8abf2775 EB |
433 | gid = make_kgid(&init_user_ns, id); |
434 | if (gid_valid(gid)) | |
435 | fgid = gid; | |
436 | } | |
faa65f07 JL |
437 | |
438 | out_key_put: | |
439 | key_put(sidkey); | |
440 | out_revert_creds: | |
441 | revert_creds(saved_cred); | |
442 | kfree(sidstr); | |
9409ae58 | 443 | |
faa65f07 JL |
444 | /* |
445 | * Note that we return 0 here unconditionally. If the mapping | |
8401e936 | 446 | * fails then we just fall back to using the ctx->linux_uid/linux_gid. |
faa65f07 | 447 | */ |
3514de3f | 448 | got_valid_id: |
f2d67931 | 449 | rc = 0; |
faa65f07 JL |
450 | if (sidtype == SIDOWNER) |
451 | fattr->cf_uid = fuid; | |
452 | else | |
453 | fattr->cf_gid = fgid; | |
f2d67931 | 454 | return rc; |
9409ae58 SP |
455 | } |
456 | ||
4d79dba0 SP |
457 | int |
458 | init_cifs_idmap(void) | |
459 | { | |
460 | struct cred *cred; | |
461 | struct key *keyring; | |
462 | int ret; | |
463 | ||
f96637be JP |
464 | cifs_dbg(FYI, "Registering the %s key type\n", |
465 | cifs_idmap_key_type.name); | |
4d79dba0 SP |
466 | |
467 | /* create an override credential set with a special thread keyring in | |
468 | * which requests are cached | |
469 | * | |
470 | * this is used to prevent malicious redirections from being installed | |
471 | * with add_key(). | |
472 | */ | |
5a17f040 | 473 | cred = prepare_kernel_cred(&init_task); |
4d79dba0 SP |
474 | if (!cred) |
475 | return -ENOMEM; | |
476 | ||
8e3028b9 EB |
477 | keyring = keyring_alloc(".cifs_idmap", |
478 | GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, cred, | |
028db3e2 LT |
479 | (KEY_POS_ALL & ~KEY_POS_SETATTR) | |
480 | KEY_USR_VIEW | KEY_USR_READ, | |
5ac7eace | 481 | KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL); |
4d79dba0 SP |
482 | if (IS_ERR(keyring)) { |
483 | ret = PTR_ERR(keyring); | |
484 | goto failed_put_cred; | |
485 | } | |
486 | ||
4d79dba0 SP |
487 | ret = register_key_type(&cifs_idmap_key_type); |
488 | if (ret < 0) | |
489 | goto failed_put_key; | |
490 | ||
491 | /* instruct request_key() to use this special keyring as a cache for | |
492 | * the results it looks up */ | |
700920eb | 493 | set_bit(KEY_FLAG_ROOT_CAN_CLEAR, &keyring->flags); |
4d79dba0 SP |
494 | cred->thread_keyring = keyring; |
495 | cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING; | |
496 | root_cred = cred; | |
497 | ||
f96637be | 498 | cifs_dbg(FYI, "cifs idmap keyring: %d\n", key_serial(keyring)); |
4d79dba0 SP |
499 | return 0; |
500 | ||
501 | failed_put_key: | |
502 | key_put(keyring); | |
503 | failed_put_cred: | |
504 | put_cred(cred); | |
505 | return ret; | |
506 | } | |
507 | ||
508 | void | |
509 | exit_cifs_idmap(void) | |
510 | { | |
511 | key_revoke(root_cred->thread_keyring); | |
512 | unregister_key_type(&cifs_idmap_key_type); | |
513 | put_cred(root_cred); | |
f96637be | 514 | cifs_dbg(FYI, "Unregistered %s key type\n", cifs_idmap_key_type.name); |
4d79dba0 SP |
515 | } |
516 | ||
97837582 | 517 | /* copy ntsd, owner sid, and group sid from a security descriptor to another */ |
bc3e9dd9 SP |
518 | static __u32 copy_sec_desc(const struct cifs_ntsd *pntsd, |
519 | struct cifs_ntsd *pnntsd, | |
520 | __u32 sidsoffset, | |
521 | struct cifs_sid *pownersid, | |
522 | struct cifs_sid *pgrpsid) | |
97837582 | 523 | { |
97837582 SF |
524 | struct cifs_sid *owner_sid_ptr, *group_sid_ptr; |
525 | struct cifs_sid *nowner_sid_ptr, *ngroup_sid_ptr; | |
526 | ||
527 | /* copy security descriptor control portion */ | |
528 | pnntsd->revision = pntsd->revision; | |
529 | pnntsd->type = pntsd->type; | |
530 | pnntsd->dacloffset = cpu_to_le32(sizeof(struct cifs_ntsd)); | |
531 | pnntsd->sacloffset = 0; | |
532 | pnntsd->osidoffset = cpu_to_le32(sidsoffset); | |
533 | pnntsd->gsidoffset = cpu_to_le32(sidsoffset + sizeof(struct cifs_sid)); | |
534 | ||
535 | /* copy owner sid */ | |
bc3e9dd9 SP |
536 | if (pownersid) |
537 | owner_sid_ptr = pownersid; | |
538 | else | |
539 | owner_sid_ptr = (struct cifs_sid *)((char *)pntsd + | |
97837582 SF |
540 | le32_to_cpu(pntsd->osidoffset)); |
541 | nowner_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset); | |
36960e44 | 542 | cifs_copy_sid(nowner_sid_ptr, owner_sid_ptr); |
97837582 SF |
543 | |
544 | /* copy group sid */ | |
bc3e9dd9 SP |
545 | if (pgrpsid) |
546 | group_sid_ptr = pgrpsid; | |
547 | else | |
548 | group_sid_ptr = (struct cifs_sid *)((char *)pntsd + | |
97837582 SF |
549 | le32_to_cpu(pntsd->gsidoffset)); |
550 | ngroup_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset + | |
551 | sizeof(struct cifs_sid)); | |
36960e44 | 552 | cifs_copy_sid(ngroup_sid_ptr, group_sid_ptr); |
97837582 | 553 | |
bc3e9dd9 | 554 | return sidsoffset + (2 * sizeof(struct cifs_sid)); |
97837582 SF |
555 | } |
556 | ||
557 | ||
630f3f0c SF |
558 | /* |
559 | change posix mode to reflect permissions | |
560 | pmode is the existing mode (we only want to overwrite part of this | |
561 | bits to set can be: S_IRWXU, S_IRWXG or S_IRWXO ie 00700 or 00070 or 00007 | |
562 | */ | |
9b5e6857 | 563 | static void access_flags_to_mode(__le32 ace_flags, int type, umode_t *pmode, |
0f22053e | 564 | umode_t *pdenied, umode_t mask) |
630f3f0c | 565 | { |
9b5e6857 | 566 | __u32 flags = le32_to_cpu(ace_flags); |
0f22053e SP |
567 | /* |
568 | * Do not assume "preferred" or "canonical" order. | |
569 | * The first DENY or ALLOW ACE which matches perfectly is | |
570 | * the permission to be used. Once allowed or denied, same | |
571 | * permission in later ACEs do not matter. | |
572 | */ | |
573 | ||
574 | /* If not already allowed, deny these bits */ | |
15b03959 | 575 | if (type == ACCESS_DENIED) { |
0f22053e SP |
576 | if (flags & GENERIC_ALL && |
577 | !(*pmode & mask & 0777)) | |
578 | *pdenied |= mask & 0777; | |
579 | ||
580 | if (((flags & GENERIC_WRITE) || | |
581 | ((flags & FILE_WRITE_RIGHTS) == FILE_WRITE_RIGHTS)) && | |
582 | !(*pmode & mask & 0222)) | |
583 | *pdenied |= mask & 0222; | |
584 | ||
585 | if (((flags & GENERIC_READ) || | |
586 | ((flags & FILE_READ_RIGHTS) == FILE_READ_RIGHTS)) && | |
587 | !(*pmode & mask & 0444)) | |
588 | *pdenied |= mask & 0444; | |
589 | ||
590 | if (((flags & GENERIC_EXECUTE) || | |
591 | ((flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS)) && | |
592 | !(*pmode & mask & 0111)) | |
593 | *pdenied |= mask & 0111; | |
594 | ||
15b03959 SF |
595 | return; |
596 | } else if (type != ACCESS_ALLOWED) { | |
f96637be | 597 | cifs_dbg(VFS, "unknown access control type %d\n", type); |
15b03959 SF |
598 | return; |
599 | } | |
600 | /* else ACCESS_ALLOWED type */ | |
630f3f0c | 601 | |
0f22053e SP |
602 | if ((flags & GENERIC_ALL) && |
603 | !(*pdenied & mask & 0777)) { | |
604 | *pmode |= mask & 0777; | |
f96637be | 605 | cifs_dbg(NOISY, "all perms\n"); |
d61e5808 SF |
606 | return; |
607 | } | |
0f22053e SP |
608 | |
609 | if (((flags & GENERIC_WRITE) || | |
610 | ((flags & FILE_WRITE_RIGHTS) == FILE_WRITE_RIGHTS)) && | |
611 | !(*pdenied & mask & 0222)) | |
612 | *pmode |= mask & 0222; | |
613 | ||
614 | if (((flags & GENERIC_READ) || | |
615 | ((flags & FILE_READ_RIGHTS) == FILE_READ_RIGHTS)) && | |
616 | !(*pdenied & mask & 0444)) | |
617 | *pmode |= mask & 0444; | |
618 | ||
619 | if (((flags & GENERIC_EXECUTE) || | |
620 | ((flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS)) && | |
621 | !(*pdenied & mask & 0111)) | |
622 | *pmode |= mask & 0111; | |
630f3f0c | 623 | |
f2156d35 SP |
624 | /* If DELETE_CHILD is set only on an owner ACE, set sticky bit */ |
625 | if (flags & FILE_DELETE_CHILD) { | |
626 | if (mask == ACL_OWNER_MASK) { | |
627 | if (!(*pdenied & 01000)) | |
628 | *pmode |= 01000; | |
629 | } else if (!(*pdenied & 01000)) { | |
630 | *pmode &= ~01000; | |
631 | *pdenied |= 01000; | |
632 | } | |
633 | } | |
634 | ||
f52aa79d | 635 | cifs_dbg(NOISY, "access flags 0x%x mode now %04o\n", flags, *pmode); |
630f3f0c SF |
636 | return; |
637 | } | |
638 | ||
ce06c9f0 SF |
639 | /* |
640 | Generate access flags to reflect permissions mode is the existing mode. | |
641 | This function is called for every ACE in the DACL whose SID matches | |
642 | with either owner or group or everyone. | |
643 | */ | |
644 | ||
645 | static void mode_to_access_flags(umode_t mode, umode_t bits_to_use, | |
646 | __u32 *pace_flags) | |
647 | { | |
648 | /* reset access mask */ | |
649 | *pace_flags = 0x0; | |
650 | ||
651 | /* bits to use are either S_IRWXU or S_IRWXG or S_IRWXO */ | |
652 | mode &= bits_to_use; | |
653 | ||
654 | /* check for R/W/X UGO since we do not know whose flags | |
655 | is this but we have cleared all the bits sans RWX for | |
656 | either user or group or other as per bits_to_use */ | |
657 | if (mode & S_IRUGO) | |
658 | *pace_flags |= SET_FILE_READ_RIGHTS; | |
659 | if (mode & S_IWUGO) | |
660 | *pace_flags |= SET_FILE_WRITE_RIGHTS; | |
661 | if (mode & S_IXUGO) | |
662 | *pace_flags |= SET_FILE_EXEC_RIGHTS; | |
663 | ||
f52aa79d | 664 | cifs_dbg(NOISY, "mode: %04o, access flags now 0x%x\n", |
f96637be | 665 | mode, *pace_flags); |
ce06c9f0 SF |
666 | return; |
667 | } | |
668 | ||
bc3e9dd9 | 669 | static __u16 cifs_copy_ace(struct cifs_ace *dst, struct cifs_ace *src, struct cifs_sid *psid) |
f5065508 SP |
670 | { |
671 | __u16 size = 1 + 1 + 2 + 4; | |
672 | ||
673 | dst->type = src->type; | |
674 | dst->flags = src->flags; | |
f5065508 | 675 | dst->access_req = src->access_req; |
bc3e9dd9 SP |
676 | |
677 | /* Check if there's a replacement sid specified */ | |
678 | if (psid) | |
679 | size += cifs_copy_sid(&dst->sid, psid); | |
680 | else | |
681 | size += cifs_copy_sid(&dst->sid, &src->sid); | |
682 | ||
683 | dst->size = cpu_to_le16(size); | |
f5065508 SP |
684 | |
685 | return size; | |
686 | } | |
687 | ||
2b210adc | 688 | static __u16 fill_ace_for_sid(struct cifs_ace *pntace, |
f2156d35 SP |
689 | const struct cifs_sid *psid, __u64 nmode, |
690 | umode_t bits, __u8 access_type, | |
691 | bool allow_delete_child) | |
97837582 SF |
692 | { |
693 | int i; | |
694 | __u16 size = 0; | |
695 | __u32 access_req = 0; | |
696 | ||
0f22053e | 697 | pntace->type = access_type; |
97837582 SF |
698 | pntace->flags = 0x0; |
699 | mode_to_access_flags(nmode, bits, &access_req); | |
f2156d35 SP |
700 | |
701 | if (access_type == ACCESS_ALLOWED && allow_delete_child) | |
702 | access_req |= FILE_DELETE_CHILD; | |
703 | ||
0f22053e | 704 | if (access_type == ACCESS_ALLOWED && !access_req) |
97837582 | 705 | access_req = SET_MINIMUM_RIGHTS; |
0f22053e SP |
706 | else if (access_type == ACCESS_DENIED) |
707 | access_req &= ~SET_MINIMUM_RIGHTS; | |
f2156d35 | 708 | |
97837582 SF |
709 | pntace->access_req = cpu_to_le32(access_req); |
710 | ||
711 | pntace->sid.revision = psid->revision; | |
712 | pntace->sid.num_subauth = psid->num_subauth; | |
852e2295 | 713 | for (i = 0; i < NUM_AUTHS; i++) |
97837582 SF |
714 | pntace->sid.authority[i] = psid->authority[i]; |
715 | for (i = 0; i < psid->num_subauth; i++) | |
716 | pntace->sid.sub_auth[i] = psid->sub_auth[i]; | |
717 | ||
718 | size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth * 4); | |
719 | pntace->size = cpu_to_le16(size); | |
720 | ||
ef571cad | 721 | return size; |
97837582 SF |
722 | } |
723 | ||
297647c2 | 724 | |
953f8681 SF |
725 | #ifdef CONFIG_CIFS_DEBUG2 |
726 | static void dump_ace(struct cifs_ace *pace, char *end_of_acl) | |
d0d66c44 | 727 | { |
d0d66c44 | 728 | int num_subauth; |
d0d66c44 SP |
729 | |
730 | /* validate that we do not go past end of acl */ | |
297647c2 | 731 | |
44093ca2 | 732 | if (le16_to_cpu(pace->size) < 16) { |
f96637be | 733 | cifs_dbg(VFS, "ACE too small %d\n", le16_to_cpu(pace->size)); |
44093ca2 SF |
734 | return; |
735 | } | |
736 | ||
737 | if (end_of_acl < (char *)pace + le16_to_cpu(pace->size)) { | |
f96637be | 738 | cifs_dbg(VFS, "ACL too small to parse ACE\n"); |
d0d66c44 | 739 | return; |
44093ca2 | 740 | } |
d0d66c44 | 741 | |
44093ca2 | 742 | num_subauth = pace->sid.num_subauth; |
d0d66c44 | 743 | if (num_subauth) { |
8f18c131 | 744 | int i; |
f96637be JP |
745 | cifs_dbg(FYI, "ACE revision %d num_auth %d type %d flags %d size %d\n", |
746 | pace->sid.revision, pace->sid.num_subauth, pace->type, | |
747 | pace->flags, le16_to_cpu(pace->size)); | |
d12fd121 | 748 | for (i = 0; i < num_subauth; ++i) { |
f96637be JP |
749 | cifs_dbg(FYI, "ACE sub_auth[%d]: 0x%x\n", |
750 | i, le32_to_cpu(pace->sid.sub_auth[i])); | |
d12fd121 SF |
751 | } |
752 | ||
753 | /* BB add length check to make sure that we do not have huge | |
754 | num auths and therefore go off the end */ | |
d12fd121 SF |
755 | } |
756 | ||
757 | return; | |
758 | } | |
953f8681 | 759 | #endif |
d12fd121 | 760 | |
a750e77c | 761 | static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl, |
d61e5808 | 762 | struct cifs_sid *pownersid, struct cifs_sid *pgrpsid, |
e2f8fbfb | 763 | struct cifs_fattr *fattr, bool mode_from_special_sid) |
d0d66c44 SP |
764 | { |
765 | int i; | |
766 | int num_aces = 0; | |
767 | int acl_size; | |
768 | char *acl_base; | |
d0d66c44 SP |
769 | struct cifs_ace **ppace; |
770 | ||
771 | /* BB need to add parm so we can store the SID BB */ | |
772 | ||
2b83457b SF |
773 | if (!pdacl) { |
774 | /* no DACL in the security descriptor, set | |
775 | all the permissions for user/group/other */ | |
0f22053e | 776 | fattr->cf_mode |= 0777; |
2b83457b SF |
777 | return; |
778 | } | |
779 | ||
d0d66c44 | 780 | /* validate that we do not go past end of acl */ |
af6f4612 | 781 | if (end_of_acl < (char *)pdacl + le16_to_cpu(pdacl->size)) { |
f96637be | 782 | cifs_dbg(VFS, "ACL too small to parse DACL\n"); |
d0d66c44 SP |
783 | return; |
784 | } | |
785 | ||
f96637be JP |
786 | cifs_dbg(NOISY, "DACL revision %d size %d num aces %d\n", |
787 | le16_to_cpu(pdacl->revision), le16_to_cpu(pdacl->size), | |
788 | le32_to_cpu(pdacl->num_aces)); | |
d0d66c44 | 789 | |
7505e052 SF |
790 | /* reset rwx permissions for user/group/other. |
791 | Also, if num_aces is 0 i.e. DACL has no ACEs, | |
792 | user/group/other have no permissions */ | |
0f22053e | 793 | fattr->cf_mode &= ~(0777); |
7505e052 | 794 | |
d0d66c44 SP |
795 | acl_base = (char *)pdacl; |
796 | acl_size = sizeof(struct cifs_acl); | |
797 | ||
adbc0358 | 798 | num_aces = le32_to_cpu(pdacl->num_aces); |
a5ff3769 | 799 | if (num_aces > 0) { |
0f22053e | 800 | umode_t denied_mode = 0; |
15b03959 | 801 | |
7250170c DC |
802 | if (num_aces > ULONG_MAX / sizeof(struct cifs_ace *)) |
803 | return; | |
6da2ec56 KC |
804 | ppace = kmalloc_array(num_aces, sizeof(struct cifs_ace *), |
805 | GFP_KERNEL); | |
f96637be | 806 | if (!ppace) |
8132b65b | 807 | return; |
d0d66c44 | 808 | |
d0d66c44 | 809 | for (i = 0; i < num_aces; ++i) { |
44093ca2 | 810 | ppace[i] = (struct cifs_ace *) (acl_base + acl_size); |
953f8681 SF |
811 | #ifdef CONFIG_CIFS_DEBUG2 |
812 | dump_ace(ppace[i], end_of_acl); | |
813 | #endif | |
e2f8fbfb SF |
814 | if (mode_from_special_sid && |
815 | (compare_sids(&(ppace[i]->sid), | |
816 | &sid_unix_NFS_mode) == 0)) { | |
817 | /* | |
818 | * Full permissions are: | |
819 | * 07777 = S_ISUID | S_ISGID | S_ISVTX | | |
820 | * S_IRWXU | S_IRWXG | S_IRWXO | |
821 | */ | |
822 | fattr->cf_mode &= ~07777; | |
823 | fattr->cf_mode |= | |
824 | le32_to_cpu(ppace[i]->sid.sub_auth[2]); | |
825 | break; | |
0f22053e SP |
826 | } else { |
827 | if (compare_sids(&(ppace[i]->sid), pownersid) == 0) { | |
828 | access_flags_to_mode(ppace[i]->access_req, | |
829 | ppace[i]->type, | |
830 | &fattr->cf_mode, | |
831 | &denied_mode, | |
832 | ACL_OWNER_MASK); | |
833 | } else if (compare_sids(&(ppace[i]->sid), pgrpsid) == 0) { | |
834 | access_flags_to_mode(ppace[i]->access_req, | |
835 | ppace[i]->type, | |
836 | &fattr->cf_mode, | |
837 | &denied_mode, | |
838 | ACL_GROUP_MASK); | |
839 | } else if ((compare_sids(&(ppace[i]->sid), &sid_everyone) == 0) || | |
840 | (compare_sids(&(ppace[i]->sid), &sid_authusers) == 0)) { | |
841 | access_flags_to_mode(ppace[i]->access_req, | |
842 | ppace[i]->type, | |
843 | &fattr->cf_mode, | |
844 | &denied_mode, | |
845 | ACL_EVERYONE_MASK); | |
846 | } | |
847 | } | |
2fbc2f17 | 848 | |
e01b6400 | 849 | |
44093ca2 | 850 | /* memcpy((void *)(&(cifscred->aces[i])), |
d12fd121 SF |
851 | (void *)ppace[i], |
852 | sizeof(struct cifs_ace)); */ | |
d0d66c44 | 853 | |
44093ca2 SF |
854 | acl_base = (char *)ppace[i]; |
855 | acl_size = le16_to_cpu(ppace[i]->size); | |
d0d66c44 SP |
856 | } |
857 | ||
858 | kfree(ppace); | |
d0d66c44 SP |
859 | } |
860 | ||
861 | return; | |
862 | } | |
863 | ||
643fbcee SF |
864 | unsigned int setup_authusers_ACE(struct cifs_ace *pntace) |
865 | { | |
866 | int i; | |
867 | unsigned int ace_size = 20; | |
868 | ||
869 | pntace->type = ACCESS_ALLOWED_ACE_TYPE; | |
870 | pntace->flags = 0x0; | |
871 | pntace->access_req = cpu_to_le32(GENERIC_ALL); | |
872 | pntace->sid.num_subauth = 1; | |
873 | pntace->sid.revision = 1; | |
874 | for (i = 0; i < NUM_AUTHS; i++) | |
875 | pntace->sid.authority[i] = sid_authusers.authority[i]; | |
876 | ||
877 | pntace->sid.sub_auth[0] = sid_authusers.sub_auth[0]; | |
878 | ||
879 | /* size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth*4) */ | |
880 | pntace->size = cpu_to_le16(ace_size); | |
881 | return ace_size; | |
882 | } | |
883 | ||
fdef665b SF |
884 | /* |
885 | * Fill in the special SID based on the mode. See | |
cba22b1c | 886 | * https://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx |
fdef665b SF |
887 | */ |
888 | unsigned int setup_special_mode_ACE(struct cifs_ace *pntace, __u64 nmode) | |
889 | { | |
890 | int i; | |
891 | unsigned int ace_size = 28; | |
892 | ||
893 | pntace->type = ACCESS_DENIED_ACE_TYPE; | |
894 | pntace->flags = 0x0; | |
895 | pntace->access_req = 0; | |
896 | pntace->sid.num_subauth = 3; | |
897 | pntace->sid.revision = 1; | |
898 | for (i = 0; i < NUM_AUTHS; i++) | |
899 | pntace->sid.authority[i] = sid_unix_NFS_mode.authority[i]; | |
900 | ||
901 | pntace->sid.sub_auth[0] = sid_unix_NFS_mode.sub_auth[0]; | |
902 | pntace->sid.sub_auth[1] = sid_unix_NFS_mode.sub_auth[1]; | |
903 | pntace->sid.sub_auth[2] = cpu_to_le32(nmode & 07777); | |
904 | ||
905 | /* size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth*4) */ | |
906 | pntace->size = cpu_to_le16(ace_size); | |
907 | return ace_size; | |
908 | } | |
bcb02034 | 909 | |
975221ec SF |
910 | unsigned int setup_special_user_owner_ACE(struct cifs_ace *pntace) |
911 | { | |
912 | int i; | |
913 | unsigned int ace_size = 28; | |
914 | ||
915 | pntace->type = ACCESS_ALLOWED_ACE_TYPE; | |
916 | pntace->flags = 0x0; | |
917 | pntace->access_req = cpu_to_le32(GENERIC_ALL); | |
918 | pntace->sid.num_subauth = 3; | |
919 | pntace->sid.revision = 1; | |
920 | for (i = 0; i < NUM_AUTHS; i++) | |
921 | pntace->sid.authority[i] = sid_unix_NFS_users.authority[i]; | |
922 | ||
923 | pntace->sid.sub_auth[0] = sid_unix_NFS_users.sub_auth[0]; | |
924 | pntace->sid.sub_auth[1] = sid_unix_NFS_users.sub_auth[1]; | |
925 | pntace->sid.sub_auth[2] = cpu_to_le32(current_fsgid().val); | |
926 | ||
927 | /* size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth*4) */ | |
928 | pntace->size = cpu_to_le16(ace_size); | |
929 | return ace_size; | |
930 | } | |
931 | ||
f5065508 SP |
932 | static void populate_new_aces(char *nacl_base, |
933 | struct cifs_sid *pownersid, | |
934 | struct cifs_sid *pgrpsid, | |
935 | __u64 *pnmode, u32 *pnum_aces, u16 *pnsize, | |
936 | bool modefromsid) | |
97837582 | 937 | { |
0f22053e | 938 | __u64 nmode; |
f5065508 SP |
939 | u32 num_aces = 0; |
940 | u16 nsize = 0; | |
0f22053e SP |
941 | __u64 user_mode; |
942 | __u64 group_mode; | |
943 | __u64 other_mode; | |
944 | __u64 deny_user_mode = 0; | |
945 | __u64 deny_group_mode = 0; | |
f2156d35 | 946 | bool sticky_set = false; |
f5065508 | 947 | struct cifs_ace *pnntace = NULL; |
97837582 | 948 | |
0f22053e | 949 | nmode = *pnmode; |
f5065508 SP |
950 | num_aces = *pnum_aces; |
951 | nsize = *pnsize; | |
0f22053e | 952 | |
22442179 | 953 | if (modefromsid) { |
f5065508 SP |
954 | pnntace = (struct cifs_ace *) (nacl_base + nsize); |
955 | nsize += setup_special_mode_ACE(pnntace, nmode); | |
e37a02c7 | 956 | num_aces++; |
0c6f4ebf RS |
957 | pnntace = (struct cifs_ace *) (nacl_base + nsize); |
958 | nsize += setup_authusers_ACE(pnntace); | |
959 | num_aces++; | |
0f22053e | 960 | goto set_size; |
e37a02c7 AA |
961 | } |
962 | ||
0f22053e SP |
963 | /* |
964 | * We'll try to keep the mode as requested by the user. | |
965 | * But in cases where we cannot meaningfully convert that | |
966 | * into ACL, return back the updated mode, so that it is | |
967 | * updated in the inode. | |
968 | */ | |
969 | ||
970 | if (!memcmp(pownersid, pgrpsid, sizeof(struct cifs_sid))) { | |
971 | /* | |
972 | * Case when owner and group SIDs are the same. | |
973 | * Set the more restrictive of the two modes. | |
974 | */ | |
975 | user_mode = nmode & (nmode << 3) & 0700; | |
976 | group_mode = nmode & (nmode >> 3) & 0070; | |
977 | } else { | |
978 | user_mode = nmode & 0700; | |
979 | group_mode = nmode & 0070; | |
980 | } | |
981 | ||
982 | other_mode = nmode & 0007; | |
983 | ||
984 | /* We need DENY ACE when the perm is more restrictive than the next sets. */ | |
985 | deny_user_mode = ~(user_mode) & ((group_mode << 3) | (other_mode << 6)) & 0700; | |
986 | deny_group_mode = ~(group_mode) & (other_mode << 3) & 0070; | |
987 | ||
988 | *pnmode = user_mode | group_mode | other_mode | (nmode & ~0777); | |
989 | ||
f2156d35 SP |
990 | /* This tells if we should allow delete child for group and everyone. */ |
991 | if (nmode & 01000) | |
992 | sticky_set = true; | |
993 | ||
0f22053e | 994 | if (deny_user_mode) { |
f5065508 SP |
995 | pnntace = (struct cifs_ace *) (nacl_base + nsize); |
996 | nsize += fill_ace_for_sid(pnntace, pownersid, deny_user_mode, | |
997 | 0700, ACCESS_DENIED, false); | |
0f22053e SP |
998 | num_aces++; |
999 | } | |
f5065508 | 1000 | |
0f22053e SP |
1001 | /* Group DENY ACE does not conflict with owner ALLOW ACE. Keep in preferred order*/ |
1002 | if (deny_group_mode && !(deny_group_mode & (user_mode >> 3))) { | |
f5065508 SP |
1003 | pnntace = (struct cifs_ace *) (nacl_base + nsize); |
1004 | nsize += fill_ace_for_sid(pnntace, pgrpsid, deny_group_mode, | |
1005 | 0070, ACCESS_DENIED, false); | |
0f22053e SP |
1006 | num_aces++; |
1007 | } | |
f5065508 SP |
1008 | |
1009 | pnntace = (struct cifs_ace *) (nacl_base + nsize); | |
1010 | nsize += fill_ace_for_sid(pnntace, pownersid, user_mode, | |
1011 | 0700, ACCESS_ALLOWED, true); | |
e37a02c7 | 1012 | num_aces++; |
f5065508 | 1013 | |
0f22053e SP |
1014 | /* Group DENY ACE conflicts with owner ALLOW ACE. So keep it after. */ |
1015 | if (deny_group_mode && (deny_group_mode & (user_mode >> 3))) { | |
f5065508 SP |
1016 | pnntace = (struct cifs_ace *) (nacl_base + nsize); |
1017 | nsize += fill_ace_for_sid(pnntace, pgrpsid, deny_group_mode, | |
1018 | 0070, ACCESS_DENIED, false); | |
0f22053e SP |
1019 | num_aces++; |
1020 | } | |
f5065508 SP |
1021 | |
1022 | pnntace = (struct cifs_ace *) (nacl_base + nsize); | |
1023 | nsize += fill_ace_for_sid(pnntace, pgrpsid, group_mode, | |
1024 | 0070, ACCESS_ALLOWED, !sticky_set); | |
e37a02c7 | 1025 | num_aces++; |
f5065508 SP |
1026 | |
1027 | pnntace = (struct cifs_ace *) (nacl_base + nsize); | |
1028 | nsize += fill_ace_for_sid(pnntace, &sid_everyone, other_mode, | |
1029 | 0007, ACCESS_ALLOWED, !sticky_set); | |
e37a02c7 | 1030 | num_aces++; |
22442179 | 1031 | |
0f22053e | 1032 | set_size: |
f5065508 SP |
1033 | *pnum_aces = num_aces; |
1034 | *pnsize = nsize; | |
1035 | } | |
1036 | ||
1037 | static __u16 replace_sids_and_copy_aces(struct cifs_acl *pdacl, struct cifs_acl *pndacl, | |
1038 | struct cifs_sid *pownersid, struct cifs_sid *pgrpsid, | |
1039 | struct cifs_sid *pnownersid, struct cifs_sid *pngrpsid) | |
1040 | { | |
1041 | int i; | |
1042 | u16 size = 0; | |
1043 | struct cifs_ace *pntace = NULL; | |
1044 | char *acl_base = NULL; | |
1045 | u32 src_num_aces = 0; | |
1046 | u16 nsize = 0; | |
1047 | struct cifs_ace *pnntace = NULL; | |
1048 | char *nacl_base = NULL; | |
1049 | u16 ace_size = 0; | |
1050 | ||
1051 | acl_base = (char *)pdacl; | |
1052 | size = sizeof(struct cifs_acl); | |
1053 | src_num_aces = le32_to_cpu(pdacl->num_aces); | |
1054 | ||
1055 | nacl_base = (char *)pndacl; | |
1056 | nsize = sizeof(struct cifs_acl); | |
1057 | ||
1058 | /* Go through all the ACEs */ | |
1059 | for (i = 0; i < src_num_aces; ++i) { | |
1060 | pntace = (struct cifs_ace *) (acl_base + size); | |
1061 | pnntace = (struct cifs_ace *) (nacl_base + nsize); | |
1062 | ||
1063 | if (pnownersid && compare_sids(&pntace->sid, pownersid) == 0) | |
bc3e9dd9 | 1064 | ace_size = cifs_copy_ace(pnntace, pntace, pnownersid); |
f5065508 | 1065 | else if (pngrpsid && compare_sids(&pntace->sid, pgrpsid) == 0) |
bc3e9dd9 | 1066 | ace_size = cifs_copy_ace(pnntace, pntace, pngrpsid); |
f5065508 | 1067 | else |
bc3e9dd9 | 1068 | ace_size = cifs_copy_ace(pnntace, pntace, NULL); |
f5065508 SP |
1069 | |
1070 | size += le16_to_cpu(pntace->size); | |
1071 | nsize += ace_size; | |
1072 | } | |
1073 | ||
1074 | return nsize; | |
1075 | } | |
1076 | ||
1077 | static int set_chmod_dacl(struct cifs_acl *pdacl, struct cifs_acl *pndacl, | |
1078 | struct cifs_sid *pownersid, struct cifs_sid *pgrpsid, | |
1079 | __u64 *pnmode, bool mode_from_sid) | |
1080 | { | |
1081 | int i; | |
1082 | u16 size = 0; | |
1083 | struct cifs_ace *pntace = NULL; | |
1084 | char *acl_base = NULL; | |
1085 | u32 src_num_aces = 0; | |
1086 | u16 nsize = 0; | |
1087 | struct cifs_ace *pnntace = NULL; | |
1088 | char *nacl_base = NULL; | |
1089 | u32 num_aces = 0; | |
f5065508 SP |
1090 | bool new_aces_set = false; |
1091 | ||
1092 | /* Assuming that pndacl and pnmode are never NULL */ | |
f5065508 SP |
1093 | nacl_base = (char *)pndacl; |
1094 | nsize = sizeof(struct cifs_acl); | |
1095 | ||
1096 | /* If pdacl is NULL, we don't have a src. Simply populate new ACL. */ | |
1097 | if (!pdacl) { | |
1098 | populate_new_aces(nacl_base, | |
1099 | pownersid, pgrpsid, | |
1100 | pnmode, &num_aces, &nsize, | |
1101 | mode_from_sid); | |
1102 | goto finalize_dacl; | |
1103 | } | |
1104 | ||
1105 | acl_base = (char *)pdacl; | |
1106 | size = sizeof(struct cifs_acl); | |
1107 | src_num_aces = le32_to_cpu(pdacl->num_aces); | |
1108 | ||
1109 | /* Retain old ACEs which we can retain */ | |
1110 | for (i = 0; i < src_num_aces; ++i) { | |
1111 | pntace = (struct cifs_ace *) (acl_base + size); | |
f5065508 SP |
1112 | |
1113 | if (!new_aces_set && (pntace->flags & INHERITED_ACE)) { | |
1114 | /* Place the new ACEs in between existing explicit and inherited */ | |
1115 | populate_new_aces(nacl_base, | |
1116 | pownersid, pgrpsid, | |
1117 | pnmode, &num_aces, &nsize, | |
1118 | mode_from_sid); | |
1119 | ||
1120 | new_aces_set = true; | |
1121 | } | |
1122 | ||
1123 | /* If it's any one of the ACE we're replacing, skip! */ | |
3bffbe9e | 1124 | if (((compare_sids(&pntace->sid, &sid_unix_NFS_mode) == 0) || |
f5065508 SP |
1125 | (compare_sids(&pntace->sid, pownersid) == 0) || |
1126 | (compare_sids(&pntace->sid, pgrpsid) == 0) || | |
1127 | (compare_sids(&pntace->sid, &sid_everyone) == 0) || | |
5171317d | 1128 | (compare_sids(&pntace->sid, &sid_authusers) == 0))) { |
f5065508 SP |
1129 | goto next_ace; |
1130 | } | |
1131 | ||
5171317d SP |
1132 | /* update the pointer to the next ACE to populate*/ |
1133 | pnntace = (struct cifs_ace *) (nacl_base + nsize); | |
1134 | ||
bc3e9dd9 | 1135 | nsize += cifs_copy_ace(pnntace, pntace, NULL); |
f5065508 SP |
1136 | num_aces++; |
1137 | ||
1138 | next_ace: | |
23bda5e6 | 1139 | size += le16_to_cpu(pntace->size); |
f5065508 SP |
1140 | } |
1141 | ||
1142 | /* If inherited ACEs are not present, place the new ones at the tail */ | |
1143 | if (!new_aces_set) { | |
1144 | populate_new_aces(nacl_base, | |
1145 | pownersid, pgrpsid, | |
1146 | pnmode, &num_aces, &nsize, | |
1147 | mode_from_sid); | |
1148 | ||
1149 | new_aces_set = true; | |
1150 | } | |
1151 | ||
1152 | finalize_dacl: | |
e37a02c7 | 1153 | pndacl->num_aces = cpu_to_le32(num_aces); |
f5065508 | 1154 | pndacl->size = cpu_to_le16(nsize); |
97837582 | 1155 | |
ef571cad | 1156 | return 0; |
97837582 SF |
1157 | } |
1158 | ||
bcb02034 SF |
1159 | static int parse_sid(struct cifs_sid *psid, char *end_of_acl) |
1160 | { | |
1161 | /* BB need to add parm so we can store the SID BB */ | |
1162 | ||
b9c7a2bb SF |
1163 | /* validate that we do not go past end of ACL - sid must be at least 8 |
1164 | bytes long (assuming no sub-auths - e.g. the null SID */ | |
1165 | if (end_of_acl < (char *)psid + 8) { | |
f96637be | 1166 | cifs_dbg(VFS, "ACL too small to parse SID %p\n", psid); |
bcb02034 SF |
1167 | return -EINVAL; |
1168 | } | |
d0d66c44 | 1169 | |
bcb02034 | 1170 | #ifdef CONFIG_CIFS_DEBUG2 |
fc03d8a5 | 1171 | if (psid->num_subauth) { |
8f18c131 | 1172 | int i; |
f96637be JP |
1173 | cifs_dbg(FYI, "SID revision %d num_auth %d\n", |
1174 | psid->revision, psid->num_subauth); | |
bcb02034 | 1175 | |
af6f4612 | 1176 | for (i = 0; i < psid->num_subauth; i++) { |
f96637be JP |
1177 | cifs_dbg(FYI, "SID sub_auth[%d]: 0x%x\n", |
1178 | i, le32_to_cpu(psid->sub_auth[i])); | |
d0d66c44 SP |
1179 | } |
1180 | ||
d12fd121 | 1181 | /* BB add length check to make sure that we do not have huge |
d0d66c44 | 1182 | num auths and therefore go off the end */ |
f96637be JP |
1183 | cifs_dbg(FYI, "RID 0x%x\n", |
1184 | le32_to_cpu(psid->sub_auth[psid->num_subauth-1])); | |
d0d66c44 | 1185 | } |
fc03d8a5 | 1186 | #endif |
d0d66c44 | 1187 | |
bcb02034 SF |
1188 | return 0; |
1189 | } | |
1190 | ||
d0d66c44 | 1191 | |
bcb02034 | 1192 | /* Convert CIFS ACL to POSIX form */ |
9409ae58 | 1193 | static int parse_sec_desc(struct cifs_sb_info *cifs_sb, |
e2f8fbfb SF |
1194 | struct cifs_ntsd *pntsd, int acl_len, struct cifs_fattr *fattr, |
1195 | bool get_mode_from_special_sid) | |
bcb02034 | 1196 | { |
9409ae58 | 1197 | int rc = 0; |
bcb02034 SF |
1198 | struct cifs_sid *owner_sid_ptr, *group_sid_ptr; |
1199 | struct cifs_acl *dacl_ptr; /* no need for SACL ptr */ | |
bcb02034 | 1200 | char *end_of_acl = ((char *)pntsd) + acl_len; |
7505e052 | 1201 | __u32 dacloffset; |
bcb02034 | 1202 | |
0b8f18e3 | 1203 | if (pntsd == NULL) |
b9c7a2bb SF |
1204 | return -EIO; |
1205 | ||
bcb02034 | 1206 | owner_sid_ptr = (struct cifs_sid *)((char *)pntsd + |
af6f4612 | 1207 | le32_to_cpu(pntsd->osidoffset)); |
bcb02034 | 1208 | group_sid_ptr = (struct cifs_sid *)((char *)pntsd + |
af6f4612 | 1209 | le32_to_cpu(pntsd->gsidoffset)); |
7505e052 | 1210 | dacloffset = le32_to_cpu(pntsd->dacloffset); |
63d2583f | 1211 | dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset); |
f96637be | 1212 | cifs_dbg(NOISY, "revision %d type 0x%x ooffset 0x%x goffset 0x%x sacloffset 0x%x dacloffset 0x%x\n", |
af6f4612 SF |
1213 | pntsd->revision, pntsd->type, le32_to_cpu(pntsd->osidoffset), |
1214 | le32_to_cpu(pntsd->gsidoffset), | |
b6b38f70 | 1215 | le32_to_cpu(pntsd->sacloffset), dacloffset); |
b9c7a2bb | 1216 | /* cifs_dump_mem("owner_sid: ", owner_sid_ptr, 64); */ |
bcb02034 | 1217 | rc = parse_sid(owner_sid_ptr, end_of_acl); |
9409ae58 | 1218 | if (rc) { |
f96637be | 1219 | cifs_dbg(FYI, "%s: Error %d parsing Owner SID\n", __func__, rc); |
9409ae58 SP |
1220 | return rc; |
1221 | } | |
1222 | rc = sid_to_id(cifs_sb, owner_sid_ptr, fattr, SIDOWNER); | |
1223 | if (rc) { | |
f96637be JP |
1224 | cifs_dbg(FYI, "%s: Error %d mapping Owner SID to uid\n", |
1225 | __func__, rc); | |
bcb02034 | 1226 | return rc; |
9409ae58 | 1227 | } |
bcb02034 SF |
1228 | |
1229 | rc = parse_sid(group_sid_ptr, end_of_acl); | |
9409ae58 | 1230 | if (rc) { |
f96637be JP |
1231 | cifs_dbg(FYI, "%s: Error %d mapping Owner SID to gid\n", |
1232 | __func__, rc); | |
bcb02034 | 1233 | return rc; |
9409ae58 SP |
1234 | } |
1235 | rc = sid_to_id(cifs_sb, group_sid_ptr, fattr, SIDGROUP); | |
1236 | if (rc) { | |
f96637be JP |
1237 | cifs_dbg(FYI, "%s: Error %d mapping Group SID to gid\n", |
1238 | __func__, rc); | |
9409ae58 SP |
1239 | return rc; |
1240 | } | |
bcb02034 | 1241 | |
7505e052 SF |
1242 | if (dacloffset) |
1243 | parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr, | |
e2f8fbfb | 1244 | group_sid_ptr, fattr, get_mode_from_special_sid); |
7505e052 | 1245 | else |
f96637be | 1246 | cifs_dbg(FYI, "no ACL\n"); /* BB grant all or default perms? */ |
d0d66c44 | 1247 | |
9409ae58 | 1248 | return rc; |
bcb02034 | 1249 | } |
b9c7a2bb | 1250 | |
97837582 SF |
1251 | /* Convert permission bits from mode to equivalent CIFS ACL */ |
1252 | static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd, | |
f5065508 | 1253 | __u32 secdesclen, __u32 *pnsecdesclen, __u64 *pnmode, kuid_t uid, kgid_t gid, |
a6603398 | 1254 | bool mode_from_sid, bool id_from_sid, int *aclflag) |
97837582 SF |
1255 | { |
1256 | int rc = 0; | |
1257 | __u32 dacloffset; | |
1258 | __u32 ndacloffset; | |
1259 | __u32 sidsoffset; | |
1260 | struct cifs_sid *owner_sid_ptr, *group_sid_ptr; | |
bc3e9dd9 | 1261 | struct cifs_sid *nowner_sid_ptr = NULL, *ngroup_sid_ptr = NULL; |
97837582 SF |
1262 | struct cifs_acl *dacl_ptr = NULL; /* no need for SACL ptr */ |
1263 | struct cifs_acl *ndacl_ptr = NULL; /* no need for SACL ptr */ | |
f5065508 | 1264 | char *end_of_acl = ((char *)pntsd) + secdesclen; |
bc3e9dd9 | 1265 | u16 size = 0; |
97837582 | 1266 | |
bc3e9dd9 SP |
1267 | dacloffset = le32_to_cpu(pntsd->dacloffset); |
1268 | if (dacloffset) { | |
1269 | dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset); | |
1270 | if (end_of_acl < (char *)dacl_ptr + le16_to_cpu(dacl_ptr->size)) { | |
f1ebe48d SP |
1271 | cifs_dbg(VFS, "Server returned illegal ACL size\n"); |
1272 | return -EINVAL; | |
f5065508 | 1273 | } |
bc3e9dd9 SP |
1274 | } |
1275 | ||
1276 | owner_sid_ptr = (struct cifs_sid *)((char *)pntsd + | |
1277 | le32_to_cpu(pntsd->osidoffset)); | |
1278 | group_sid_ptr = (struct cifs_sid *)((char *)pntsd + | |
1279 | le32_to_cpu(pntsd->gsidoffset)); | |
f5065508 | 1280 | |
bc3e9dd9 | 1281 | if (pnmode && *pnmode != NO_CHANGE_64) { /* chmod */ |
a5ff3769 SP |
1282 | ndacloffset = sizeof(struct cifs_ntsd); |
1283 | ndacl_ptr = (struct cifs_acl *)((char *)pnntsd + ndacloffset); | |
f5065508 SP |
1284 | ndacl_ptr->revision = |
1285 | dacloffset ? dacl_ptr->revision : cpu_to_le16(ACL_REVISION); | |
a5ff3769 | 1286 | |
23bda5e6 | 1287 | ndacl_ptr->size = cpu_to_le16(0); |
f5065508 SP |
1288 | ndacl_ptr->num_aces = cpu_to_le32(0); |
1289 | ||
1290 | rc = set_chmod_dacl(dacl_ptr, ndacl_ptr, owner_sid_ptr, group_sid_ptr, | |
0f22053e | 1291 | pnmode, mode_from_sid); |
bc3e9dd9 | 1292 | |
a5ff3769 | 1293 | sidsoffset = ndacloffset + le16_to_cpu(ndacl_ptr->size); |
bc3e9dd9 SP |
1294 | /* copy the non-dacl portion of secdesc */ |
1295 | *pnsecdesclen = copy_sec_desc(pntsd, pnntsd, sidsoffset, | |
1296 | NULL, NULL); | |
1297 | ||
1298 | *aclflag |= CIFS_ACL_DACL; | |
a5ff3769 | 1299 | } else { |
f5065508 SP |
1300 | ndacloffset = sizeof(struct cifs_ntsd); |
1301 | ndacl_ptr = (struct cifs_acl *)((char *)pnntsd + ndacloffset); | |
1302 | ndacl_ptr->revision = | |
1303 | dacloffset ? dacl_ptr->revision : cpu_to_le16(ACL_REVISION); | |
a5628263 | 1304 | ndacl_ptr->num_aces = dacl_ptr ? dacl_ptr->num_aces : 0; |
f5065508 | 1305 | |
8abf2775 EB |
1306 | if (uid_valid(uid)) { /* chown */ |
1307 | uid_t id; | |
26d3dade | 1308 | nowner_sid_ptr = kzalloc(sizeof(struct cifs_sid), |
a5ff3769 | 1309 | GFP_KERNEL); |
bc3e9dd9 SP |
1310 | if (!nowner_sid_ptr) { |
1311 | rc = -ENOMEM; | |
1312 | goto chown_chgrp_exit; | |
1313 | } | |
8abf2775 | 1314 | id = from_kuid(&init_user_ns, uid); |
a6603398 SF |
1315 | if (id_from_sid) { |
1316 | struct owner_sid *osid = (struct owner_sid *)nowner_sid_ptr; | |
1317 | /* Populate the user ownership fields S-1-5-88-1 */ | |
1318 | osid->Revision = 1; | |
1319 | osid->NumAuth = 3; | |
1320 | osid->Authority[5] = 5; | |
1321 | osid->SubAuthorities[0] = cpu_to_le32(88); | |
1322 | osid->SubAuthorities[1] = cpu_to_le32(1); | |
1323 | osid->SubAuthorities[2] = cpu_to_le32(id); | |
bc3e9dd9 | 1324 | |
a6603398 SF |
1325 | } else { /* lookup sid with upcall */ |
1326 | rc = id_to_sid(id, SIDOWNER, nowner_sid_ptr); | |
1327 | if (rc) { | |
1328 | cifs_dbg(FYI, "%s: Mapping error %d for owner id %d\n", | |
1329 | __func__, rc, id); | |
bc3e9dd9 | 1330 | goto chown_chgrp_exit; |
a6603398 | 1331 | } |
a5ff3769 | 1332 | } |
bc3e9dd9 | 1333 | *aclflag |= CIFS_ACL_OWNER; |
a5ff3769 | 1334 | } |
8abf2775 EB |
1335 | if (gid_valid(gid)) { /* chgrp */ |
1336 | gid_t id; | |
26d3dade | 1337 | ngroup_sid_ptr = kzalloc(sizeof(struct cifs_sid), |
a5ff3769 | 1338 | GFP_KERNEL); |
bc3e9dd9 SP |
1339 | if (!ngroup_sid_ptr) { |
1340 | rc = -ENOMEM; | |
1341 | goto chown_chgrp_exit; | |
1342 | } | |
8abf2775 | 1343 | id = from_kgid(&init_user_ns, gid); |
a6603398 SF |
1344 | if (id_from_sid) { |
1345 | struct owner_sid *gsid = (struct owner_sid *)ngroup_sid_ptr; | |
1346 | /* Populate the group ownership fields S-1-5-88-2 */ | |
1347 | gsid->Revision = 1; | |
1348 | gsid->NumAuth = 3; | |
1349 | gsid->Authority[5] = 5; | |
1350 | gsid->SubAuthorities[0] = cpu_to_le32(88); | |
1351 | gsid->SubAuthorities[1] = cpu_to_le32(2); | |
1352 | gsid->SubAuthorities[2] = cpu_to_le32(id); | |
bc3e9dd9 | 1353 | |
a6603398 SF |
1354 | } else { /* lookup sid with upcall */ |
1355 | rc = id_to_sid(id, SIDGROUP, ngroup_sid_ptr); | |
1356 | if (rc) { | |
1357 | cifs_dbg(FYI, "%s: Mapping error %d for group id %d\n", | |
1358 | __func__, rc, id); | |
bc3e9dd9 | 1359 | goto chown_chgrp_exit; |
a6603398 | 1360 | } |
a5ff3769 | 1361 | } |
bc3e9dd9 | 1362 | *aclflag |= CIFS_ACL_GROUP; |
a5ff3769 | 1363 | } |
bc3e9dd9 SP |
1364 | |
1365 | if (dacloffset) { | |
1366 | /* Replace ACEs for old owner with new one */ | |
1367 | size = replace_sids_and_copy_aces(dacl_ptr, ndacl_ptr, | |
1368 | owner_sid_ptr, group_sid_ptr, | |
1369 | nowner_sid_ptr, ngroup_sid_ptr); | |
1370 | ndacl_ptr->size = cpu_to_le16(size); | |
1371 | } | |
1372 | ||
1373 | sidsoffset = ndacloffset + le16_to_cpu(ndacl_ptr->size); | |
1374 | /* copy the non-dacl portion of secdesc */ | |
1375 | *pnsecdesclen = copy_sec_desc(pntsd, pnntsd, sidsoffset, | |
1376 | nowner_sid_ptr, ngroup_sid_ptr); | |
1377 | ||
1378 | chown_chgrp_exit: | |
1379 | /* errors could jump here. So make sure we return soon after this */ | |
1380 | kfree(nowner_sid_ptr); | |
1381 | kfree(ngroup_sid_ptr); | |
a5ff3769 | 1382 | } |
97837582 | 1383 | |
ef571cad | 1384 | return rc; |
97837582 SF |
1385 | } |
1386 | ||
fb157ed2 | 1387 | #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY |
42eacf9e | 1388 | struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb, |
3970acf7 BP |
1389 | const struct cifs_fid *cifsfid, u32 *pacllen, |
1390 | u32 __maybe_unused unused) | |
b9c7a2bb | 1391 | { |
b9c7a2bb | 1392 | struct cifs_ntsd *pntsd = NULL; |
6d5786a3 PS |
1393 | unsigned int xid; |
1394 | int rc; | |
7ffec372 JL |
1395 | struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); |
1396 | ||
1397 | if (IS_ERR(tlink)) | |
987b21d7 | 1398 | return ERR_CAST(tlink); |
b9c7a2bb | 1399 | |
6d5786a3 | 1400 | xid = get_xid(); |
42eacf9e SF |
1401 | rc = CIFSSMBGetCIFSACL(xid, tlink_tcon(tlink), cifsfid->netfid, &pntsd, |
1402 | pacllen); | |
6d5786a3 | 1403 | free_xid(xid); |
b9c7a2bb | 1404 | |
7ffec372 | 1405 | cifs_put_tlink(tlink); |
b9c7a2bb | 1406 | |
f96637be | 1407 | cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); |
987b21d7 SP |
1408 | if (rc) |
1409 | return ERR_PTR(rc); | |
1bf4072d CH |
1410 | return pntsd; |
1411 | } | |
8b1327f6 | 1412 | |
1bf4072d CH |
1413 | static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, |
1414 | const char *path, u32 *pacllen) | |
1415 | { | |
1416 | struct cifs_ntsd *pntsd = NULL; | |
1417 | int oplock = 0; | |
6d5786a3 | 1418 | unsigned int xid; |
0f060936 | 1419 | int rc; |
96daf2b0 | 1420 | struct cifs_tcon *tcon; |
7ffec372 | 1421 | struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); |
d81b8a40 PS |
1422 | struct cifs_fid fid; |
1423 | struct cifs_open_parms oparms; | |
7ffec372 JL |
1424 | |
1425 | if (IS_ERR(tlink)) | |
987b21d7 | 1426 | return ERR_CAST(tlink); |
b9c7a2bb | 1427 | |
7ffec372 | 1428 | tcon = tlink_tcon(tlink); |
6d5786a3 | 1429 | xid = get_xid(); |
1bf4072d | 1430 | |
de036dca VL |
1431 | oparms = (struct cifs_open_parms) { |
1432 | .tcon = tcon, | |
1433 | .cifs_sb = cifs_sb, | |
1434 | .desired_access = READ_CONTROL, | |
1435 | .create_options = cifs_create_options(cifs_sb, 0), | |
1436 | .disposition = FILE_OPEN, | |
1437 | .path = path, | |
1438 | .fid = &fid, | |
1439 | }; | |
d81b8a40 PS |
1440 | |
1441 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
987b21d7 | 1442 | if (!rc) { |
d81b8a40 PS |
1443 | rc = CIFSSMBGetCIFSACL(xid, tcon, fid.netfid, &pntsd, pacllen); |
1444 | CIFSSMBClose(xid, tcon, fid.netfid); | |
b9c7a2bb SF |
1445 | } |
1446 | ||
7ffec372 | 1447 | cifs_put_tlink(tlink); |
6d5786a3 | 1448 | free_xid(xid); |
987b21d7 | 1449 | |
f96637be | 1450 | cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); |
987b21d7 SP |
1451 | if (rc) |
1452 | return ERR_PTR(rc); | |
7505e052 SF |
1453 | return pntsd; |
1454 | } | |
1455 | ||
1bf4072d | 1456 | /* Retrieve an ACL from the server */ |
fbeba8bb | 1457 | struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb, |
1bf4072d | 1458 | struct inode *inode, const char *path, |
3970acf7 | 1459 | u32 *pacllen, u32 info) |
1bf4072d CH |
1460 | { |
1461 | struct cifs_ntsd *pntsd = NULL; | |
1462 | struct cifsFileInfo *open_file = NULL; | |
1463 | ||
1464 | if (inode) | |
6508d904 | 1465 | open_file = find_readable_file(CIFS_I(inode), true); |
1bf4072d CH |
1466 | if (!open_file) |
1467 | return get_cifs_acl_by_path(cifs_sb, path, pacllen); | |
1468 | ||
3970acf7 | 1469 | pntsd = get_cifs_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); |
6ab409b5 | 1470 | cifsFileInfo_put(open_file); |
1bf4072d CH |
1471 | return pntsd; |
1472 | } | |
1473 | ||
a5ff3769 SP |
1474 | /* Set an ACL on the server */ |
1475 | int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen, | |
1476 | struct inode *inode, const char *path, int aclflag) | |
b96d31a6 CH |
1477 | { |
1478 | int oplock = 0; | |
6d5786a3 | 1479 | unsigned int xid; |
0f060936 | 1480 | int rc, access_flags; |
96daf2b0 | 1481 | struct cifs_tcon *tcon; |
a5ff3769 | 1482 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 | 1483 | struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); |
d81b8a40 PS |
1484 | struct cifs_fid fid; |
1485 | struct cifs_open_parms oparms; | |
97837582 | 1486 | |
7ffec372 JL |
1487 | if (IS_ERR(tlink)) |
1488 | return PTR_ERR(tlink); | |
1489 | ||
1490 | tcon = tlink_tcon(tlink); | |
6d5786a3 | 1491 | xid = get_xid(); |
97837582 | 1492 | |
a5ff3769 SP |
1493 | if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP) |
1494 | access_flags = WRITE_OWNER; | |
1495 | else | |
1496 | access_flags = WRITE_DAC; | |
1497 | ||
de036dca VL |
1498 | oparms = (struct cifs_open_parms) { |
1499 | .tcon = tcon, | |
1500 | .cifs_sb = cifs_sb, | |
1501 | .desired_access = access_flags, | |
1502 | .create_options = cifs_create_options(cifs_sb, 0), | |
1503 | .disposition = FILE_OPEN, | |
1504 | .path = path, | |
1505 | .fid = &fid, | |
1506 | }; | |
d81b8a40 PS |
1507 | |
1508 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
b96d31a6 | 1509 | if (rc) { |
f96637be | 1510 | cifs_dbg(VFS, "Unable to open file to set ACL\n"); |
b96d31a6 | 1511 | goto out; |
97837582 SF |
1512 | } |
1513 | ||
d81b8a40 | 1514 | rc = CIFSSMBSetCIFSACL(xid, tcon, fid.netfid, pnntsd, acllen, aclflag); |
f96637be | 1515 | cifs_dbg(NOISY, "SetCIFSACL rc = %d\n", rc); |
97837582 | 1516 | |
d81b8a40 | 1517 | CIFSSMBClose(xid, tcon, fid.netfid); |
7ffec372 | 1518 | out: |
6d5786a3 | 1519 | free_xid(xid); |
7ffec372 | 1520 | cifs_put_tlink(tlink); |
b96d31a6 CH |
1521 | return rc; |
1522 | } | |
fb157ed2 | 1523 | #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */ |
97837582 | 1524 | |
36c7ce4a | 1525 | /* Translate the CIFS ACL (similar to NTFS ACL) for a file into mode bits */ |
987b21d7 | 1526 | int |
0b8f18e3 | 1527 | cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, |
e2f8fbfb SF |
1528 | struct inode *inode, bool mode_from_special_sid, |
1529 | const char *path, const struct cifs_fid *pfid) | |
7505e052 SF |
1530 | { |
1531 | struct cifs_ntsd *pntsd = NULL; | |
1532 | u32 acllen = 0; | |
1533 | int rc = 0; | |
42eacf9e | 1534 | struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); |
ecdcf622 | 1535 | struct smb_version_operations *ops; |
3970acf7 | 1536 | const u32 info = 0; |
7505e052 | 1537 | |
f96637be | 1538 | cifs_dbg(NOISY, "converting ACL to mode for %s\n", path); |
1bf4072d | 1539 | |
42eacf9e SF |
1540 | if (IS_ERR(tlink)) |
1541 | return PTR_ERR(tlink); | |
7505e052 | 1542 | |
ecdcf622 JP |
1543 | ops = tlink_tcon(tlink)->ses->server->ops; |
1544 | ||
1545 | if (pfid && (ops->get_acl_by_fid)) | |
3970acf7 | 1546 | pntsd = ops->get_acl_by_fid(cifs_sb, pfid, &acllen, info); |
ecdcf622 | 1547 | else if (ops->get_acl) |
3970acf7 | 1548 | pntsd = ops->get_acl(cifs_sb, inode, path, &acllen, info); |
42eacf9e SF |
1549 | else { |
1550 | cifs_put_tlink(tlink); | |
1551 | return -EOPNOTSUPP; | |
1552 | } | |
7505e052 | 1553 | /* if we can retrieve the ACL, now parse Access Control Entries, ACEs */ |
987b21d7 SP |
1554 | if (IS_ERR(pntsd)) { |
1555 | rc = PTR_ERR(pntsd); | |
f96637be | 1556 | cifs_dbg(VFS, "%s: error %d getting sec desc\n", __func__, rc); |
e2f8fbfb SF |
1557 | } else if (mode_from_special_sid) { |
1558 | rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr, true); | |
98128572 | 1559 | kfree(pntsd); |
987b21d7 | 1560 | } else { |
e2f8fbfb SF |
1561 | /* get approximated mode from ACL */ |
1562 | rc = parse_sec_desc(cifs_sb, pntsd, acllen, fattr, false); | |
987b21d7 SP |
1563 | kfree(pntsd); |
1564 | if (rc) | |
f96637be | 1565 | cifs_dbg(VFS, "parse sec desc failed rc = %d\n", rc); |
987b21d7 | 1566 | } |
7505e052 | 1567 | |
42eacf9e SF |
1568 | cifs_put_tlink(tlink); |
1569 | ||
987b21d7 | 1570 | return rc; |
b9c7a2bb | 1571 | } |
953f8681 | 1572 | |
7505e052 | 1573 | /* Convert mode bits to an ACL so we can update the ACL on the server */ |
a5ff3769 | 1574 | int |
0f22053e | 1575 | id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 *pnmode, |
8abf2775 | 1576 | kuid_t uid, kgid_t gid) |
953f8681 SF |
1577 | { |
1578 | int rc = 0; | |
a5ff3769 | 1579 | int aclflag = CIFS_ACL_DACL; /* default flag to set */ |
cce246ee | 1580 | __u32 secdesclen = 0; |
f5065508 SP |
1581 | __u32 nsecdesclen = 0; |
1582 | __u32 dacloffset = 0; | |
1583 | struct cifs_acl *dacl_ptr = NULL; | |
97837582 SF |
1584 | struct cifs_ntsd *pntsd = NULL; /* acl obtained from server */ |
1585 | struct cifs_ntsd *pnntsd = NULL; /* modified acl to be sent to server */ | |
83e3bc23 SF |
1586 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
1587 | struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); | |
ecdcf622 | 1588 | struct smb_version_operations *ops; |
a6603398 | 1589 | bool mode_from_sid, id_from_sid; |
3970acf7 | 1590 | const u32 info = 0; |
83e3bc23 SF |
1591 | |
1592 | if (IS_ERR(tlink)) | |
1593 | return PTR_ERR(tlink); | |
ecdcf622 JP |
1594 | |
1595 | ops = tlink_tcon(tlink)->ses->server->ops; | |
953f8681 | 1596 | |
f96637be | 1597 | cifs_dbg(NOISY, "set ACL from mode for %s\n", path); |
953f8681 SF |
1598 | |
1599 | /* Get the security descriptor */ | |
83e3bc23 | 1600 | |
ecdcf622 | 1601 | if (ops->get_acl == NULL) { |
83e3bc23 SF |
1602 | cifs_put_tlink(tlink); |
1603 | return -EOPNOTSUPP; | |
1604 | } | |
1605 | ||
3970acf7 | 1606 | pntsd = ops->get_acl(cifs_sb, inode, path, &secdesclen, info); |
987b21d7 SP |
1607 | if (IS_ERR(pntsd)) { |
1608 | rc = PTR_ERR(pntsd); | |
f96637be | 1609 | cifs_dbg(VFS, "%s: error %d getting sec desc\n", __func__, rc); |
83e3bc23 SF |
1610 | cifs_put_tlink(tlink); |
1611 | return rc; | |
c78cd838 | 1612 | } |
7505e052 | 1613 | |
f5065508 SP |
1614 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) |
1615 | mode_from_sid = true; | |
1616 | else | |
1617 | mode_from_sid = false; | |
1618 | ||
1619 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) | |
1620 | id_from_sid = true; | |
1621 | else | |
1622 | id_from_sid = false; | |
1623 | ||
1624 | /* Potentially, five new ACEs can be added to the ACL for U,G,O mapping */ | |
1625 | nsecdesclen = secdesclen; | |
1626 | if (pnmode && *pnmode != NO_CHANGE_64) { /* chmod */ | |
1627 | if (mode_from_sid) | |
0c6f4ebf | 1628 | nsecdesclen += 2 * sizeof(struct cifs_ace); |
f5065508 SP |
1629 | else /* cifsacl */ |
1630 | nsecdesclen += 5 * sizeof(struct cifs_ace); | |
bc3e9dd9 SP |
1631 | } else { /* chown */ |
1632 | /* When ownership changes, changes new owner sid length could be different */ | |
1633 | nsecdesclen = sizeof(struct cifs_ntsd) + (sizeof(struct cifs_sid) * 2); | |
1634 | dacloffset = le32_to_cpu(pntsd->dacloffset); | |
1635 | if (dacloffset) { | |
1636 | dacl_ptr = (struct cifs_acl *)((char *)pntsd + dacloffset); | |
1637 | if (mode_from_sid) | |
1638 | nsecdesclen += | |
23bda5e6 | 1639 | le32_to_cpu(dacl_ptr->num_aces) * sizeof(struct cifs_ace); |
bc3e9dd9 SP |
1640 | else /* cifsacl */ |
1641 | nsecdesclen += le16_to_cpu(dacl_ptr->size); | |
1642 | } | |
f5065508 SP |
1643 | } |
1644 | ||
c78cd838 JL |
1645 | /* |
1646 | * Add three ACEs for owner, group, everyone getting rid of other ACEs | |
1647 | * as chmod disables ACEs and set the security descriptor. Allocate | |
1648 | * memory for the smb header, set security descriptor request security | |
c45adff7 | 1649 | * descriptor parameters, and security descriptor itself |
c78cd838 | 1650 | */ |
f5065508 SP |
1651 | nsecdesclen = max_t(u32, nsecdesclen, DEFAULT_SEC_DESC_LEN); |
1652 | pnntsd = kmalloc(nsecdesclen, GFP_KERNEL); | |
c78cd838 | 1653 | if (!pnntsd) { |
c78cd838 | 1654 | kfree(pntsd); |
83e3bc23 | 1655 | cifs_put_tlink(tlink); |
c78cd838 JL |
1656 | return -ENOMEM; |
1657 | } | |
97837582 | 1658 | |
f5065508 | 1659 | rc = build_sec_desc(pntsd, pnntsd, secdesclen, &nsecdesclen, pnmode, uid, gid, |
a6603398 | 1660 | mode_from_sid, id_from_sid, &aclflag); |
97837582 | 1661 | |
f96637be | 1662 | cifs_dbg(NOISY, "build_sec_desc rc: %d\n", rc); |
97837582 | 1663 | |
ecdcf622 | 1664 | if (ops->set_acl == NULL) |
83e3bc23 SF |
1665 | rc = -EOPNOTSUPP; |
1666 | ||
c78cd838 JL |
1667 | if (!rc) { |
1668 | /* Set the security descriptor */ | |
f5065508 | 1669 | rc = ops->set_acl(pnntsd, nsecdesclen, inode, path, aclflag); |
f96637be | 1670 | cifs_dbg(NOISY, "set_cifs_acl rc: %d\n", rc); |
97837582 | 1671 | } |
83e3bc23 | 1672 | cifs_put_tlink(tlink); |
97837582 | 1673 | |
c78cd838 JL |
1674 | kfree(pnntsd); |
1675 | kfree(pntsd); | |
ef571cad | 1676 | return rc; |
953f8681 | 1677 | } |
bd9684b0 | 1678 | |
77435322 | 1679 | struct posix_acl *cifs_get_acl(struct mnt_idmap *idmap, |
bd9684b0 CB |
1680 | struct dentry *dentry, int type) |
1681 | { | |
1682 | #if defined(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) && defined(CONFIG_CIFS_POSIX) | |
1683 | struct posix_acl *acl = NULL; | |
1684 | ssize_t rc = -EOPNOTSUPP; | |
1685 | unsigned int xid; | |
1686 | struct super_block *sb = dentry->d_sb; | |
1687 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1688 | struct tcon_link *tlink; | |
1689 | struct cifs_tcon *pTcon; | |
1690 | const char *full_path; | |
1691 | void *page; | |
1692 | ||
1693 | tlink = cifs_sb_tlink(cifs_sb); | |
1694 | if (IS_ERR(tlink)) | |
1695 | return ERR_CAST(tlink); | |
1696 | pTcon = tlink_tcon(tlink); | |
1697 | ||
1698 | xid = get_xid(); | |
1699 | page = alloc_dentry_path(); | |
1700 | ||
1701 | full_path = build_path_from_dentry(dentry, page); | |
1702 | if (IS_ERR(full_path)) { | |
1703 | acl = ERR_CAST(full_path); | |
1704 | goto out; | |
1705 | } | |
1706 | ||
1707 | /* return alt name if available as pseudo attr */ | |
1708 | switch (type) { | |
1709 | case ACL_TYPE_ACCESS: | |
1710 | if (sb->s_flags & SB_POSIXACL) | |
1711 | rc = cifs_do_get_acl(xid, pTcon, full_path, &acl, | |
1712 | ACL_TYPE_ACCESS, | |
1713 | cifs_sb->local_nls, | |
1714 | cifs_remap(cifs_sb)); | |
1715 | break; | |
1716 | ||
1717 | case ACL_TYPE_DEFAULT: | |
1718 | if (sb->s_flags & SB_POSIXACL) | |
1719 | rc = cifs_do_get_acl(xid, pTcon, full_path, &acl, | |
1720 | ACL_TYPE_DEFAULT, | |
1721 | cifs_sb->local_nls, | |
1722 | cifs_remap(cifs_sb)); | |
1723 | break; | |
1724 | } | |
1725 | ||
1726 | if (rc < 0) { | |
1727 | if (rc == -EINVAL) | |
1728 | acl = ERR_PTR(-EOPNOTSUPP); | |
1729 | else | |
1730 | acl = ERR_PTR(rc); | |
1731 | } | |
1732 | ||
1733 | out: | |
1734 | free_dentry_path(page); | |
1735 | free_xid(xid); | |
1736 | cifs_put_tlink(tlink); | |
1737 | return acl; | |
1738 | #else | |
1739 | return ERR_PTR(-EOPNOTSUPP); | |
1740 | #endif | |
1741 | } | |
dc1af4c4 | 1742 | |
13e83a49 | 1743 | int cifs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, |
dc1af4c4 CB |
1744 | struct posix_acl *acl, int type) |
1745 | { | |
1746 | #if defined(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) && defined(CONFIG_CIFS_POSIX) | |
1747 | int rc = -EOPNOTSUPP; | |
1748 | unsigned int xid; | |
1749 | struct super_block *sb = dentry->d_sb; | |
1750 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1751 | struct tcon_link *tlink; | |
1752 | struct cifs_tcon *pTcon; | |
1753 | const char *full_path; | |
1754 | void *page; | |
1755 | ||
1756 | tlink = cifs_sb_tlink(cifs_sb); | |
1757 | if (IS_ERR(tlink)) | |
1758 | return PTR_ERR(tlink); | |
1759 | pTcon = tlink_tcon(tlink); | |
1760 | ||
1761 | xid = get_xid(); | |
1762 | page = alloc_dentry_path(); | |
1763 | ||
1764 | full_path = build_path_from_dentry(dentry, page); | |
1765 | if (IS_ERR(full_path)) { | |
1766 | rc = PTR_ERR(full_path); | |
1767 | goto out; | |
1768 | } | |
cb2144d6 CB |
1769 | |
1770 | if (!acl) | |
1771 | goto out; | |
1772 | ||
dc1af4c4 CB |
1773 | /* return dos attributes as pseudo xattr */ |
1774 | /* return alt name if available as pseudo attr */ | |
1775 | ||
1776 | /* if proc/fs/cifs/streamstoxattr is set then | |
1777 | search server for EAs or streams to | |
1778 | returns as xattrs */ | |
1779 | if (posix_acl_xattr_size(acl->a_count) > CIFSMaxBufSize) { | |
1780 | cifs_dbg(FYI, "size of EA value too large\n"); | |
1781 | rc = -EOPNOTSUPP; | |
1782 | goto out; | |
1783 | } | |
1784 | ||
1785 | switch (type) { | |
1786 | case ACL_TYPE_ACCESS: | |
dc1af4c4 CB |
1787 | if (sb->s_flags & SB_POSIXACL) |
1788 | rc = cifs_do_set_acl(xid, pTcon, full_path, acl, | |
1789 | ACL_TYPE_ACCESS, | |
1790 | cifs_sb->local_nls, | |
1791 | cifs_remap(cifs_sb)); | |
1792 | break; | |
1793 | ||
1794 | case ACL_TYPE_DEFAULT: | |
dc1af4c4 CB |
1795 | if (sb->s_flags & SB_POSIXACL) |
1796 | rc = cifs_do_set_acl(xid, pTcon, full_path, acl, | |
1797 | ACL_TYPE_DEFAULT, | |
1798 | cifs_sb->local_nls, | |
1799 | cifs_remap(cifs_sb)); | |
1800 | break; | |
1801 | } | |
1802 | ||
1803 | out: | |
1804 | free_dentry_path(page); | |
1805 | free_xid(xid); | |
1806 | cifs_put_tlink(tlink); | |
1807 | return rc; | |
1808 | #else | |
1809 | return -EOPNOTSUPP; | |
1810 | #endif | |
1811 | } |