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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License version 2 for more details (a copy is included | |
14 | * in the LICENSE file that accompanied this code). | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * version 2 along with this program; If not, see | |
18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf | |
19 | * | |
20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
21 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
30 | * Copyright (c) 2012, Intel Corporation. | |
31 | */ | |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | * | |
36 | * lustre/obdclass/acl.c | |
37 | * | |
38 | * Lustre Access Control List. | |
39 | * | |
40 | * Author: Fan Yong <fanyong@clusterfs.com> | |
41 | */ | |
42 | ||
43 | #define DEBUG_SUBSYSTEM S_SEC | |
44 | #include <lu_object.h> | |
45 | #include <lustre_acl.h> | |
46 | #include <lustre_eacl.h> | |
47 | #include <obd_support.h> | |
48 | ||
49 | #ifdef CONFIG_FS_POSIX_ACL | |
50 | ||
51 | #define CFS_ACL_XATTR_VERSION POSIX_ACL_XATTR_VERSION | |
52 | ||
53 | enum { | |
54 | ES_UNK = 0, /* unknown stat */ | |
55 | ES_UNC = 1, /* ACL entry is not changed */ | |
56 | ES_MOD = 2, /* ACL entry is modified */ | |
57 | ES_ADD = 3, /* ACL entry is added */ | |
58 | ES_DEL = 4 /* ACL entry is deleted */ | |
59 | }; | |
60 | ||
61 | static inline void lustre_ext_acl_le_to_cpu(ext_acl_xattr_entry *d, | |
62 | ext_acl_xattr_entry *s) | |
63 | { | |
64 | d->e_tag = le16_to_cpu(s->e_tag); | |
65 | d->e_perm = le16_to_cpu(s->e_perm); | |
66 | d->e_id = le32_to_cpu(s->e_id); | |
67 | d->e_stat = le32_to_cpu(s->e_stat); | |
68 | } | |
69 | ||
70 | static inline void lustre_ext_acl_cpu_to_le(ext_acl_xattr_entry *d, | |
71 | ext_acl_xattr_entry *s) | |
72 | { | |
73 | d->e_tag = cpu_to_le16(s->e_tag); | |
74 | d->e_perm = cpu_to_le16(s->e_perm); | |
75 | d->e_id = cpu_to_le32(s->e_id); | |
76 | d->e_stat = cpu_to_le32(s->e_stat); | |
77 | } | |
78 | ||
79 | static inline void lustre_posix_acl_le_to_cpu(posix_acl_xattr_entry *d, | |
80 | posix_acl_xattr_entry *s) | |
81 | { | |
82 | d->e_tag = le16_to_cpu(s->e_tag); | |
83 | d->e_perm = le16_to_cpu(s->e_perm); | |
84 | d->e_id = le32_to_cpu(s->e_id); | |
85 | } | |
86 | ||
87 | static inline void lustre_posix_acl_cpu_to_le(posix_acl_xattr_entry *d, | |
88 | posix_acl_xattr_entry *s) | |
89 | { | |
90 | d->e_tag = cpu_to_le16(s->e_tag); | |
91 | d->e_perm = cpu_to_le16(s->e_perm); | |
92 | d->e_id = cpu_to_le32(s->e_id); | |
93 | } | |
94 | ||
95 | ||
96 | /* if "new_count == 0", then "new = {a_version, NULL}", NOT NULL. */ | |
97 | static int lustre_posix_acl_xattr_reduce_space(posix_acl_xattr_header **header, | |
98 | int old_count, int new_count) | |
99 | { | |
100 | int old_size = CFS_ACL_XATTR_SIZE(old_count, posix_acl_xattr); | |
101 | int new_size = CFS_ACL_XATTR_SIZE(new_count, posix_acl_xattr); | |
102 | posix_acl_xattr_header *new; | |
103 | ||
104 | if (unlikely(old_count <= new_count)) | |
105 | return old_size; | |
106 | ||
107 | OBD_ALLOC(new, new_size); | |
108 | if (unlikely(new == NULL)) | |
109 | return -ENOMEM; | |
110 | ||
111 | memcpy(new, *header, new_size); | |
112 | OBD_FREE(*header, old_size); | |
113 | *header = new; | |
114 | return new_size; | |
115 | } | |
116 | ||
117 | /* if "new_count == 0", then "new = {0, NULL}", NOT NULL. */ | |
118 | static int lustre_ext_acl_xattr_reduce_space(ext_acl_xattr_header **header, | |
119 | int old_count) | |
120 | { | |
121 | int ext_count = le32_to_cpu((*header)->a_count); | |
122 | int ext_size = CFS_ACL_XATTR_SIZE(ext_count, ext_acl_xattr); | |
123 | int old_size = CFS_ACL_XATTR_SIZE(old_count, ext_acl_xattr); | |
124 | ext_acl_xattr_header *new; | |
125 | ||
126 | if (unlikely(old_count <= ext_count)) | |
127 | return 0; | |
128 | ||
129 | OBD_ALLOC(new, ext_size); | |
130 | if (unlikely(new == NULL)) | |
131 | return -ENOMEM; | |
132 | ||
133 | memcpy(new, *header, ext_size); | |
134 | OBD_FREE(*header, old_size); | |
135 | *header = new; | |
136 | return 0; | |
137 | } | |
138 | ||
139 | /* | |
140 | * Generate new extended ACL based on the posix ACL. | |
141 | */ | |
142 | ext_acl_xattr_header * | |
143 | lustre_posix_acl_xattr_2ext(posix_acl_xattr_header *header, int size) | |
144 | { | |
145 | int count, i, esize; | |
146 | ext_acl_xattr_header *new; | |
d7e09d03 PT |
147 | |
148 | if (unlikely(size < 0)) | |
0a3bdb00 | 149 | return ERR_PTR(-EINVAL); |
d7e09d03 PT |
150 | else if (!size) |
151 | count = 0; | |
152 | else | |
153 | count = CFS_ACL_XATTR_COUNT(size, posix_acl_xattr); | |
154 | esize = CFS_ACL_XATTR_SIZE(count, ext_acl_xattr); | |
155 | OBD_ALLOC(new, esize); | |
156 | if (unlikely(new == NULL)) | |
0a3bdb00 | 157 | return ERR_PTR(-ENOMEM); |
d7e09d03 PT |
158 | |
159 | new->a_count = cpu_to_le32(count); | |
160 | for (i = 0; i < count; i++) { | |
161 | new->a_entries[i].e_tag = header->a_entries[i].e_tag; | |
162 | new->a_entries[i].e_perm = header->a_entries[i].e_perm; | |
163 | new->a_entries[i].e_id = header->a_entries[i].e_id; | |
164 | new->a_entries[i].e_stat = cpu_to_le32(ES_UNK); | |
165 | } | |
166 | ||
0a3bdb00 | 167 | return new; |
d7e09d03 PT |
168 | } |
169 | EXPORT_SYMBOL(lustre_posix_acl_xattr_2ext); | |
170 | ||
171 | /* | |
172 | * Filter out the "nobody" entries in the posix ACL. | |
173 | */ | |
174 | int lustre_posix_acl_xattr_filter(posix_acl_xattr_header *header, int size, | |
175 | posix_acl_xattr_header **out) | |
176 | { | |
177 | int count, i, j, rc = 0; | |
178 | __u32 id; | |
179 | posix_acl_xattr_header *new; | |
d7e09d03 PT |
180 | |
181 | if (unlikely(size < 0)) | |
0a3bdb00 | 182 | return -EINVAL; |
d7e09d03 | 183 | else if (!size) |
0a3bdb00 | 184 | return 0; |
d7e09d03 PT |
185 | |
186 | OBD_ALLOC(new, size); | |
187 | if (unlikely(new == NULL)) | |
0a3bdb00 | 188 | return -ENOMEM; |
d7e09d03 PT |
189 | |
190 | new->a_version = cpu_to_le32(CFS_ACL_XATTR_VERSION); | |
191 | count = CFS_ACL_XATTR_COUNT(size, posix_acl_xattr); | |
192 | for (i = 0, j = 0; i < count; i++) { | |
193 | id = le32_to_cpu(header->a_entries[i].e_id); | |
194 | switch (le16_to_cpu(header->a_entries[i].e_tag)) { | |
195 | case ACL_USER_OBJ: | |
196 | case ACL_GROUP_OBJ: | |
197 | case ACL_MASK: | |
198 | case ACL_OTHER: | |
199 | if (id != ACL_UNDEFINED_ID) | |
200 | GOTO(_out, rc = -EIO); | |
201 | ||
202 | memcpy(&new->a_entries[j++], &header->a_entries[i], | |
203 | sizeof(posix_acl_xattr_entry)); | |
204 | break; | |
205 | case ACL_USER: | |
206 | if (id != NOBODY_UID) | |
207 | memcpy(&new->a_entries[j++], | |
208 | &header->a_entries[i], | |
209 | sizeof(posix_acl_xattr_entry)); | |
210 | break; | |
211 | case ACL_GROUP: | |
212 | if (id != NOBODY_GID) | |
213 | memcpy(&new->a_entries[j++], | |
214 | &header->a_entries[i], | |
215 | sizeof(posix_acl_xattr_entry)); | |
216 | break; | |
217 | default: | |
218 | GOTO(_out, rc = -EIO); | |
219 | } | |
220 | } | |
221 | ||
222 | /* free unused space. */ | |
223 | rc = lustre_posix_acl_xattr_reduce_space(&new, count, j); | |
224 | if (rc >= 0) { | |
225 | size = rc; | |
226 | *out = new; | |
227 | rc = 0; | |
228 | } | |
d7e09d03 PT |
229 | |
230 | _out: | |
231 | if (rc) { | |
232 | OBD_FREE(new, size); | |
233 | size = rc; | |
234 | } | |
235 | return size; | |
236 | } | |
237 | EXPORT_SYMBOL(lustre_posix_acl_xattr_filter); | |
238 | ||
239 | /* | |
240 | * Release the posix ACL space. | |
241 | */ | |
242 | void lustre_posix_acl_xattr_free(posix_acl_xattr_header *header, int size) | |
243 | { | |
244 | OBD_FREE(header, size); | |
245 | } | |
246 | EXPORT_SYMBOL(lustre_posix_acl_xattr_free); | |
247 | ||
248 | /* | |
249 | * Release the extended ACL space. | |
250 | */ | |
251 | void lustre_ext_acl_xattr_free(ext_acl_xattr_header *header) | |
252 | { | |
253 | OBD_FREE(header, CFS_ACL_XATTR_SIZE(le32_to_cpu(header->a_count), \ | |
254 | ext_acl_xattr)); | |
255 | } | |
256 | EXPORT_SYMBOL(lustre_ext_acl_xattr_free); | |
257 | ||
258 | static ext_acl_xattr_entry * | |
259 | lustre_ext_acl_xattr_search(ext_acl_xattr_header *header, | |
260 | posix_acl_xattr_entry *entry, int *pos) | |
261 | { | |
262 | int once, start, end, i, j, count = le32_to_cpu(header->a_count); | |
263 | ||
264 | once = 0; | |
265 | start = *pos; | |
266 | end = count; | |
267 | ||
268 | again: | |
269 | for (i = start; i < end; i++) { | |
270 | if (header->a_entries[i].e_tag == entry->e_tag && | |
271 | header->a_entries[i].e_id == entry->e_id) { | |
272 | j = i; | |
273 | if (++i >= count) | |
274 | i = 0; | |
275 | *pos = i; | |
276 | return &header->a_entries[j]; | |
277 | } | |
278 | } | |
279 | ||
280 | if (!once) { | |
281 | once = 1; | |
282 | start = 0; | |
283 | end = *pos; | |
284 | goto again; | |
285 | } | |
286 | ||
287 | return NULL; | |
288 | } | |
289 | ||
290 | /* | |
291 | * Merge the posix ACL and the extended ACL into new posix ACL. | |
292 | */ | |
293 | int lustre_acl_xattr_merge2posix(posix_acl_xattr_header *posix_header, int size, | |
294 | ext_acl_xattr_header *ext_header, | |
295 | posix_acl_xattr_header **out) | |
296 | { | |
297 | int posix_count, posix_size, i, j; | |
298 | int ext_count = le32_to_cpu(ext_header->a_count), pos = 0, rc = 0; | |
299 | posix_acl_xattr_entry pe = {ACL_MASK, 0, ACL_UNDEFINED_ID}; | |
300 | posix_acl_xattr_header *new; | |
301 | ext_acl_xattr_entry *ee, ae; | |
d7e09d03 PT |
302 | |
303 | lustre_posix_acl_cpu_to_le(&pe, &pe); | |
304 | ee = lustre_ext_acl_xattr_search(ext_header, &pe, &pos); | |
305 | if (ee == NULL || le32_to_cpu(ee->e_stat) == ES_DEL) { | |
306 | /* there are only base ACL entries at most. */ | |
307 | posix_count = 3; | |
308 | posix_size = CFS_ACL_XATTR_SIZE(posix_count, posix_acl_xattr); | |
309 | OBD_ALLOC(new, posix_size); | |
310 | if (unlikely(new == NULL)) | |
0a3bdb00 | 311 | return -ENOMEM; |
d7e09d03 PT |
312 | |
313 | new->a_version = cpu_to_le32(CFS_ACL_XATTR_VERSION); | |
314 | for (i = 0, j = 0; i < ext_count; i++) { | |
315 | lustre_ext_acl_le_to_cpu(&ae, | |
316 | &ext_header->a_entries[i]); | |
317 | switch (ae.e_tag) { | |
318 | case ACL_USER_OBJ: | |
319 | case ACL_GROUP_OBJ: | |
320 | case ACL_OTHER: | |
321 | if (ae.e_id != ACL_UNDEFINED_ID) | |
322 | GOTO(_out, rc = -EIO); | |
323 | ||
324 | if (ae.e_stat != ES_DEL) { | |
325 | new->a_entries[j].e_tag = | |
326 | ext_header->a_entries[i].e_tag; | |
327 | new->a_entries[j].e_perm = | |
328 | ext_header->a_entries[i].e_perm; | |
329 | new->a_entries[j++].e_id = | |
330 | ext_header->a_entries[i].e_id; | |
331 | } | |
332 | break; | |
333 | case ACL_MASK: | |
334 | case ACL_USER: | |
335 | case ACL_GROUP: | |
336 | if (ae.e_stat == ES_DEL) | |
337 | break; | |
338 | default: | |
339 | GOTO(_out, rc = -EIO); | |
340 | } | |
341 | } | |
342 | } else { | |
343 | /* maybe there are valid ACL_USER or ACL_GROUP entries in the | |
344 | * original server-side ACL, they are regarded as ES_UNC stat.*/ | |
345 | int ori_posix_count; | |
346 | ||
347 | if (unlikely(size < 0)) | |
0a3bdb00 | 348 | return -EINVAL; |
d7e09d03 PT |
349 | else if (!size) |
350 | ori_posix_count = 0; | |
351 | else | |
352 | ori_posix_count = | |
353 | CFS_ACL_XATTR_COUNT(size, posix_acl_xattr); | |
354 | posix_count = ori_posix_count + ext_count; | |
355 | posix_size = | |
356 | CFS_ACL_XATTR_SIZE(posix_count, posix_acl_xattr); | |
357 | OBD_ALLOC(new, posix_size); | |
358 | if (unlikely(new == NULL)) | |
0a3bdb00 | 359 | return -ENOMEM; |
d7e09d03 PT |
360 | |
361 | new->a_version = cpu_to_le32(CFS_ACL_XATTR_VERSION); | |
362 | /* 1. process the unchanged ACL entries | |
363 | * in the original server-side ACL. */ | |
364 | pos = 0; | |
365 | for (i = 0, j = 0; i < ori_posix_count; i++) { | |
366 | ee = lustre_ext_acl_xattr_search(ext_header, | |
367 | &posix_header->a_entries[i], &pos); | |
368 | if (ee == NULL) | |
369 | memcpy(&new->a_entries[j++], | |
370 | &posix_header->a_entries[i], | |
371 | sizeof(posix_acl_xattr_entry)); | |
372 | } | |
373 | ||
374 | /* 2. process the non-deleted entries | |
375 | * from client-side extended ACL. */ | |
376 | for (i = 0; i < ext_count; i++) { | |
377 | if (le16_to_cpu(ext_header->a_entries[i].e_stat) != | |
378 | ES_DEL) { | |
379 | new->a_entries[j].e_tag = | |
380 | ext_header->a_entries[i].e_tag; | |
381 | new->a_entries[j].e_perm = | |
382 | ext_header->a_entries[i].e_perm; | |
383 | new->a_entries[j++].e_id = | |
384 | ext_header->a_entries[i].e_id; | |
385 | } | |
386 | } | |
387 | } | |
388 | ||
389 | /* free unused space. */ | |
390 | rc = lustre_posix_acl_xattr_reduce_space(&new, posix_count, j); | |
391 | if (rc >= 0) { | |
392 | posix_size = rc; | |
393 | *out = new; | |
394 | rc = 0; | |
395 | } | |
d7e09d03 PT |
396 | |
397 | _out: | |
398 | if (rc) { | |
399 | OBD_FREE(new, posix_size); | |
400 | posix_size = rc; | |
401 | } | |
402 | return posix_size; | |
403 | } | |
404 | EXPORT_SYMBOL(lustre_acl_xattr_merge2posix); | |
405 | ||
406 | /* | |
407 | * Merge the posix ACL and the extended ACL into new extended ACL. | |
408 | */ | |
409 | ext_acl_xattr_header * | |
410 | lustre_acl_xattr_merge2ext(posix_acl_xattr_header *posix_header, int size, | |
411 | ext_acl_xattr_header *ext_header) | |
412 | { | |
413 | int ori_ext_count, posix_count, ext_count, ext_size; | |
414 | int i, j, pos = 0, rc = 0; | |
415 | posix_acl_xattr_entry pae; | |
416 | ext_acl_xattr_header *new; | |
417 | ext_acl_xattr_entry *ee, eae; | |
d7e09d03 PT |
418 | |
419 | if (unlikely(size < 0)) | |
0a3bdb00 | 420 | return ERR_PTR(-EINVAL); |
d7e09d03 PT |
421 | else if (!size) |
422 | posix_count = 0; | |
423 | else | |
424 | posix_count = CFS_ACL_XATTR_COUNT(size, posix_acl_xattr); | |
425 | ori_ext_count = le32_to_cpu(ext_header->a_count); | |
426 | ext_count = posix_count + ori_ext_count; | |
427 | ext_size = CFS_ACL_XATTR_SIZE(ext_count, ext_acl_xattr); | |
428 | ||
429 | OBD_ALLOC(new, ext_size); | |
430 | if (unlikely(new == NULL)) | |
0a3bdb00 | 431 | return ERR_PTR(-ENOMEM); |
d7e09d03 PT |
432 | |
433 | for (i = 0, j = 0; i < posix_count; i++) { | |
434 | lustre_posix_acl_le_to_cpu(&pae, &posix_header->a_entries[i]); | |
435 | switch (pae.e_tag) { | |
436 | case ACL_USER_OBJ: | |
437 | case ACL_GROUP_OBJ: | |
438 | case ACL_MASK: | |
439 | case ACL_OTHER: | |
440 | if (pae.e_id != ACL_UNDEFINED_ID) | |
441 | GOTO(out, rc = -EIO); | |
442 | case ACL_USER: | |
443 | /* ignore "nobody" entry. */ | |
444 | if (pae.e_id == NOBODY_UID) | |
445 | break; | |
446 | ||
447 | new->a_entries[j].e_tag = | |
448 | posix_header->a_entries[i].e_tag; | |
449 | new->a_entries[j].e_perm = | |
450 | posix_header->a_entries[i].e_perm; | |
451 | new->a_entries[j].e_id = | |
452 | posix_header->a_entries[i].e_id; | |
453 | ee = lustre_ext_acl_xattr_search(ext_header, | |
454 | &posix_header->a_entries[i], &pos); | |
455 | if (ee) { | |
456 | if (posix_header->a_entries[i].e_perm != | |
457 | ee->e_perm) | |
458 | /* entry modified. */ | |
459 | ee->e_stat = | |
460 | new->a_entries[j++].e_stat = | |
461 | cpu_to_le32(ES_MOD); | |
462 | else | |
463 | /* entry unchanged. */ | |
464 | ee->e_stat = | |
465 | new->a_entries[j++].e_stat = | |
466 | cpu_to_le32(ES_UNC); | |
467 | } else { | |
468 | /* new entry. */ | |
469 | new->a_entries[j++].e_stat = | |
470 | cpu_to_le32(ES_ADD); | |
471 | } | |
472 | break; | |
473 | case ACL_GROUP: | |
474 | /* ignore "nobody" entry. */ | |
475 | if (pae.e_id == NOBODY_GID) | |
476 | break; | |
477 | new->a_entries[j].e_tag = | |
478 | posix_header->a_entries[i].e_tag; | |
479 | new->a_entries[j].e_perm = | |
480 | posix_header->a_entries[i].e_perm; | |
481 | new->a_entries[j].e_id = | |
482 | posix_header->a_entries[i].e_id; | |
483 | ee = lustre_ext_acl_xattr_search(ext_header, | |
484 | &posix_header->a_entries[i], &pos); | |
485 | if (ee) { | |
486 | if (posix_header->a_entries[i].e_perm != | |
487 | ee->e_perm) | |
488 | /* entry modified. */ | |
489 | ee->e_stat = | |
490 | new->a_entries[j++].e_stat = | |
491 | cpu_to_le32(ES_MOD); | |
492 | else | |
493 | /* entry unchanged. */ | |
494 | ee->e_stat = | |
495 | new->a_entries[j++].e_stat = | |
496 | cpu_to_le32(ES_UNC); | |
497 | } else { | |
498 | /* new entry. */ | |
499 | new->a_entries[j++].e_stat = | |
500 | cpu_to_le32(ES_ADD); | |
501 | } | |
502 | break; | |
503 | default: | |
504 | GOTO(out, rc = -EIO); | |
505 | } | |
506 | } | |
507 | ||
508 | /* process deleted entries. */ | |
509 | for (i = 0; i < ori_ext_count; i++) { | |
510 | lustre_ext_acl_le_to_cpu(&eae, &ext_header->a_entries[i]); | |
511 | if (eae.e_stat == ES_UNK) { | |
512 | /* ignore "nobody" entry. */ | |
513 | if ((eae.e_tag == ACL_USER && eae.e_id == NOBODY_UID) || | |
514 | (eae.e_tag == ACL_GROUP && eae.e_id == NOBODY_GID)) | |
515 | continue; | |
516 | ||
517 | new->a_entries[j].e_tag = | |
518 | ext_header->a_entries[i].e_tag; | |
519 | new->a_entries[j].e_perm = | |
520 | ext_header->a_entries[i].e_perm; | |
521 | new->a_entries[j].e_id = ext_header->a_entries[i].e_id; | |
522 | new->a_entries[j++].e_stat = cpu_to_le32(ES_DEL); | |
523 | } | |
524 | } | |
525 | ||
526 | new->a_count = cpu_to_le32(j); | |
527 | /* free unused space. */ | |
528 | rc = lustre_ext_acl_xattr_reduce_space(&new, ext_count); | |
d7e09d03 PT |
529 | |
530 | out: | |
531 | if (rc) { | |
532 | OBD_FREE(new, ext_size); | |
533 | new = ERR_PTR(rc); | |
534 | } | |
535 | return new; | |
536 | } | |
537 | EXPORT_SYMBOL(lustre_acl_xattr_merge2ext); | |
538 | ||
539 | #endif |