Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/link.c | |
3 | * | |
366781c1 | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/fs.h> | |
22 | #include <linux/stat.h> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
1da177e4 LT |
24 | #include <linux/namei.h> |
25 | #include "cifsfs.h" | |
26 | #include "cifspdu.h" | |
27 | #include "cifsglob.h" | |
28 | #include "cifsproto.h" | |
29 | #include "cifs_debug.h" | |
30 | #include "cifs_fs_sb.h" | |
c69c1b6e SM |
31 | #include "md5.h" |
32 | ||
33 | #define CIFS_MF_SYMLINK_LEN_OFFSET (4+1) | |
34 | #define CIFS_MF_SYMLINK_MD5_OFFSET (CIFS_MF_SYMLINK_LEN_OFFSET+(4+1)) | |
35 | #define CIFS_MF_SYMLINK_LINK_OFFSET (CIFS_MF_SYMLINK_MD5_OFFSET+(32+1)) | |
36 | #define CIFS_MF_SYMLINK_LINK_MAXLEN (1024) | |
37 | #define CIFS_MF_SYMLINK_FILE_SIZE \ | |
38 | (CIFS_MF_SYMLINK_LINK_OFFSET + CIFS_MF_SYMLINK_LINK_MAXLEN) | |
39 | ||
40 | #define CIFS_MF_SYMLINK_LEN_FORMAT "XSym\n%04u\n" | |
41 | #define CIFS_MF_SYMLINK_MD5_FORMAT \ | |
42 | "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n" | |
43 | #define CIFS_MF_SYMLINK_MD5_ARGS(md5_hash) \ | |
44 | md5_hash[0], md5_hash[1], md5_hash[2], md5_hash[3], \ | |
45 | md5_hash[4], md5_hash[5], md5_hash[6], md5_hash[7], \ | |
46 | md5_hash[8], md5_hash[9], md5_hash[10], md5_hash[11],\ | |
47 | md5_hash[12], md5_hash[13], md5_hash[14], md5_hash[15] | |
48 | ||
49 | static int | |
50 | CIFSParseMFSymlink(const u8 *buf, | |
51 | unsigned int buf_len, | |
52 | unsigned int *_link_len, | |
53 | char **_link_str) | |
54 | { | |
55 | int rc; | |
56 | unsigned int link_len; | |
57 | const char *md5_str1; | |
58 | const char *link_str; | |
59 | struct MD5Context md5_ctx; | |
60 | u8 md5_hash[16]; | |
61 | char md5_str2[34]; | |
62 | ||
63 | if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE) | |
64 | return -EINVAL; | |
65 | ||
66 | md5_str1 = (const char *)&buf[CIFS_MF_SYMLINK_MD5_OFFSET]; | |
67 | link_str = (const char *)&buf[CIFS_MF_SYMLINK_LINK_OFFSET]; | |
68 | ||
69 | rc = sscanf(buf, CIFS_MF_SYMLINK_LEN_FORMAT, &link_len); | |
70 | if (rc != 1) | |
71 | return -EINVAL; | |
72 | ||
73 | cifs_MD5_init(&md5_ctx); | |
74 | cifs_MD5_update(&md5_ctx, (const u8 *)link_str, link_len); | |
75 | cifs_MD5_final(md5_hash, &md5_ctx); | |
76 | ||
77 | snprintf(md5_str2, sizeof(md5_str2), | |
78 | CIFS_MF_SYMLINK_MD5_FORMAT, | |
79 | CIFS_MF_SYMLINK_MD5_ARGS(md5_hash)); | |
80 | ||
81 | if (strncmp(md5_str1, md5_str2, 17) != 0) | |
82 | return -EINVAL; | |
83 | ||
84 | if (_link_str) { | |
85 | *_link_str = kstrndup(link_str, link_len, GFP_KERNEL); | |
86 | if (!*_link_str) | |
87 | return -ENOMEM; | |
88 | } | |
89 | ||
90 | *_link_len = link_len; | |
91 | return 0; | |
92 | } | |
1da177e4 | 93 | |
0fd43ae4 | 94 | static int |
18bddd10 SM |
95 | CIFSFormatMFSymlink(u8 *buf, unsigned int buf_len, const char *link_str) |
96 | { | |
97 | unsigned int link_len; | |
98 | unsigned int ofs; | |
99 | struct MD5Context md5_ctx; | |
100 | u8 md5_hash[16]; | |
101 | ||
102 | if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE) | |
103 | return -EINVAL; | |
104 | ||
105 | link_len = strlen(link_str); | |
106 | ||
107 | if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN) | |
108 | return -ENAMETOOLONG; | |
109 | ||
110 | cifs_MD5_init(&md5_ctx); | |
111 | cifs_MD5_update(&md5_ctx, (const u8 *)link_str, link_len); | |
112 | cifs_MD5_final(md5_hash, &md5_ctx); | |
113 | ||
114 | snprintf(buf, buf_len, | |
115 | CIFS_MF_SYMLINK_LEN_FORMAT CIFS_MF_SYMLINK_MD5_FORMAT, | |
116 | link_len, | |
117 | CIFS_MF_SYMLINK_MD5_ARGS(md5_hash)); | |
118 | ||
119 | ofs = CIFS_MF_SYMLINK_LINK_OFFSET; | |
120 | memcpy(buf + ofs, link_str, link_len); | |
121 | ||
122 | ofs += link_len; | |
123 | if (ofs < CIFS_MF_SYMLINK_FILE_SIZE) { | |
124 | buf[ofs] = '\n'; | |
125 | ofs++; | |
126 | } | |
127 | ||
128 | while (ofs < CIFS_MF_SYMLINK_FILE_SIZE) { | |
129 | buf[ofs] = ' '; | |
130 | ofs++; | |
131 | } | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
8713d01d SM |
136 | static int |
137 | CIFSCreateMFSymLink(const int xid, struct cifsTconInfo *tcon, | |
138 | const char *fromName, const char *toName, | |
139 | const struct nls_table *nls_codepage, int remap) | |
140 | { | |
141 | int rc; | |
142 | int oplock = 0; | |
143 | __u16 netfid = 0; | |
144 | u8 *buf; | |
145 | unsigned int bytes_written = 0; | |
146 | ||
147 | buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL); | |
148 | if (!buf) | |
149 | return -ENOMEM; | |
150 | ||
151 | rc = CIFSFormatMFSymlink(buf, CIFS_MF_SYMLINK_FILE_SIZE, toName); | |
152 | if (rc != 0) { | |
153 | kfree(buf); | |
154 | return rc; | |
155 | } | |
156 | ||
157 | rc = CIFSSMBOpen(xid, tcon, fromName, FILE_CREATE, GENERIC_WRITE, | |
158 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
159 | nls_codepage, remap); | |
160 | if (rc != 0) { | |
161 | kfree(buf); | |
162 | return rc; | |
163 | } | |
164 | ||
165 | rc = CIFSSMBWrite(xid, tcon, netfid, | |
166 | CIFS_MF_SYMLINK_FILE_SIZE /* length */, | |
167 | 0 /* offset */, | |
168 | &bytes_written, buf, NULL, 0); | |
169 | CIFSSMBClose(xid, tcon, netfid); | |
170 | kfree(buf); | |
171 | if (rc != 0) | |
172 | return rc; | |
173 | ||
174 | if (bytes_written != CIFS_MF_SYMLINK_FILE_SIZE) | |
175 | return -EIO; | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
180 | static int | |
0fd43ae4 SM |
181 | CIFSQueryMFSymLink(const int xid, struct cifsTconInfo *tcon, |
182 | const unsigned char *searchName, char **symlinkinfo, | |
183 | const struct nls_table *nls_codepage, int remap) | |
184 | { | |
185 | int rc; | |
186 | int oplock = 0; | |
187 | __u16 netfid = 0; | |
188 | u8 *buf; | |
189 | char *pbuf; | |
190 | unsigned int bytes_read = 0; | |
191 | int buf_type = CIFS_NO_BUFFER; | |
192 | unsigned int link_len = 0; | |
193 | FILE_ALL_INFO file_info; | |
194 | ||
195 | rc = CIFSSMBOpen(xid, tcon, searchName, FILE_OPEN, GENERIC_READ, | |
196 | CREATE_NOT_DIR, &netfid, &oplock, &file_info, | |
197 | nls_codepage, remap); | |
198 | if (rc != 0) | |
199 | return rc; | |
200 | ||
201 | if (file_info.EndOfFile != CIFS_MF_SYMLINK_FILE_SIZE) { | |
202 | CIFSSMBClose(xid, tcon, netfid); | |
203 | /* it's not a symlink */ | |
204 | return -EINVAL; | |
205 | } | |
206 | ||
207 | buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL); | |
208 | if (!buf) | |
209 | return -ENOMEM; | |
210 | pbuf = buf; | |
211 | ||
212 | rc = CIFSSMBRead(xid, tcon, netfid, | |
213 | CIFS_MF_SYMLINK_FILE_SIZE /* length */, | |
214 | 0 /* offset */, | |
215 | &bytes_read, &pbuf, &buf_type); | |
216 | CIFSSMBClose(xid, tcon, netfid); | |
217 | if (rc != 0) { | |
218 | kfree(buf); | |
219 | return rc; | |
220 | } | |
221 | ||
222 | rc = CIFSParseMFSymlink(buf, bytes_read, &link_len, symlinkinfo); | |
223 | kfree(buf); | |
224 | if (rc != 0) | |
225 | return rc; | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
8bfb50a8 SM |
230 | bool |
231 | CIFSCouldBeMFSymlink(const struct cifs_fattr *fattr) | |
232 | { | |
233 | if (!(fattr->cf_mode & S_IFREG)) | |
234 | /* it's not a symlink */ | |
235 | return false; | |
236 | ||
237 | if (fattr->cf_eof != CIFS_MF_SYMLINK_FILE_SIZE) | |
238 | /* it's not a symlink */ | |
239 | return false; | |
240 | ||
241 | return true; | |
242 | } | |
243 | ||
244 | int | |
245 | CIFSCheckMFSymlink(struct cifs_fattr *fattr, | |
246 | const unsigned char *path, | |
247 | struct cifs_sb_info *cifs_sb, int xid) | |
248 | { | |
249 | int rc; | |
250 | int oplock = 0; | |
251 | __u16 netfid = 0; | |
7ffec372 JL |
252 | struct tcon_link *tlink; |
253 | struct cifsTconInfo *pTcon; | |
8bfb50a8 SM |
254 | u8 *buf; |
255 | char *pbuf; | |
256 | unsigned int bytes_read = 0; | |
257 | int buf_type = CIFS_NO_BUFFER; | |
258 | unsigned int link_len = 0; | |
259 | FILE_ALL_INFO file_info; | |
260 | ||
261 | if (!CIFSCouldBeMFSymlink(fattr)) | |
262 | /* it's not a symlink */ | |
263 | return 0; | |
264 | ||
7ffec372 JL |
265 | tlink = cifs_sb_tlink(cifs_sb); |
266 | if (IS_ERR(tlink)) | |
267 | return PTR_ERR(tlink); | |
268 | pTcon = tlink_tcon(tlink); | |
269 | ||
8bfb50a8 SM |
270 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
271 | CREATE_NOT_DIR, &netfid, &oplock, &file_info, | |
272 | cifs_sb->local_nls, | |
273 | cifs_sb->mnt_cifs_flags & | |
274 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
275 | if (rc != 0) | |
7ffec372 | 276 | goto out; |
8bfb50a8 SM |
277 | |
278 | if (file_info.EndOfFile != CIFS_MF_SYMLINK_FILE_SIZE) { | |
279 | CIFSSMBClose(xid, pTcon, netfid); | |
280 | /* it's not a symlink */ | |
7ffec372 | 281 | goto out; |
8bfb50a8 SM |
282 | } |
283 | ||
284 | buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL); | |
7ffec372 JL |
285 | if (!buf) { |
286 | rc = -ENOMEM; | |
287 | goto out; | |
288 | } | |
8bfb50a8 SM |
289 | pbuf = buf; |
290 | ||
291 | rc = CIFSSMBRead(xid, pTcon, netfid, | |
292 | CIFS_MF_SYMLINK_FILE_SIZE /* length */, | |
293 | 0 /* offset */, | |
294 | &bytes_read, &pbuf, &buf_type); | |
295 | CIFSSMBClose(xid, pTcon, netfid); | |
296 | if (rc != 0) { | |
297 | kfree(buf); | |
7ffec372 | 298 | goto out; |
8bfb50a8 SM |
299 | } |
300 | ||
301 | rc = CIFSParseMFSymlink(buf, bytes_read, &link_len, NULL); | |
302 | kfree(buf); | |
7ffec372 | 303 | if (rc == -EINVAL) { |
8bfb50a8 | 304 | /* it's not a symlink */ |
7ffec372 JL |
305 | rc = 0; |
306 | goto out; | |
307 | } | |
308 | ||
8bfb50a8 | 309 | if (rc != 0) |
7ffec372 | 310 | goto out; |
8bfb50a8 SM |
311 | |
312 | /* it is a symlink */ | |
313 | fattr->cf_eof = link_len; | |
314 | fattr->cf_mode &= ~S_IFMT; | |
315 | fattr->cf_mode |= S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO; | |
316 | fattr->cf_dtype = DT_LNK; | |
7ffec372 JL |
317 | out: |
318 | cifs_put_tlink(tlink); | |
319 | return rc; | |
8bfb50a8 SM |
320 | } |
321 | ||
1da177e4 LT |
322 | int |
323 | cifs_hardlink(struct dentry *old_file, struct inode *inode, | |
324 | struct dentry *direntry) | |
325 | { | |
326 | int rc = -EACCES; | |
327 | int xid; | |
328 | char *fromName = NULL; | |
329 | char *toName = NULL; | |
7ffec372 JL |
330 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
331 | struct tcon_link *tlink; | |
1da177e4 LT |
332 | struct cifsTconInfo *pTcon; |
333 | struct cifsInodeInfo *cifsInode; | |
334 | ||
7ffec372 JL |
335 | tlink = cifs_sb_tlink(cifs_sb); |
336 | if (IS_ERR(tlink)) | |
337 | return PTR_ERR(tlink); | |
338 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 339 | |
7ffec372 | 340 | xid = GetXid(); |
1da177e4 | 341 | |
7f57356b SF |
342 | fromName = build_path_from_dentry(old_file); |
343 | toName = build_path_from_dentry(direntry); | |
fb8c4b14 | 344 | if ((fromName == NULL) || (toName == NULL)) { |
1da177e4 LT |
345 | rc = -ENOMEM; |
346 | goto cifs_hl_exit; | |
347 | } | |
348 | ||
c18c842b | 349 | if (pTcon->unix_ext) |
1da177e4 | 350 | rc = CIFSUnixCreateHardLink(xid, pTcon, fromName, toName, |
7ffec372 JL |
351 | cifs_sb->local_nls, |
352 | cifs_sb->mnt_cifs_flags & | |
737b758c | 353 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 LT |
354 | else { |
355 | rc = CIFSCreateHardLink(xid, pTcon, fromName, toName, | |
7ffec372 JL |
356 | cifs_sb->local_nls, |
357 | cifs_sb->mnt_cifs_flags & | |
737b758c | 358 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
fb8c4b14 SF |
359 | if ((rc == -EIO) || (rc == -EINVAL)) |
360 | rc = -EOPNOTSUPP; | |
1da177e4 LT |
361 | } |
362 | ||
31ec35d6 SF |
363 | d_drop(direntry); /* force new lookup from server of target */ |
364 | ||
365 | /* if source file is cached (oplocked) revalidate will not go to server | |
366 | until the file is closed or oplock broken so update nlinks locally */ | |
fb8c4b14 | 367 | if (old_file->d_inode) { |
31ec35d6 | 368 | cifsInode = CIFS_I(old_file->d_inode); |
fb8c4b14 | 369 | if (rc == 0) { |
31ec35d6 | 370 | old_file->d_inode->i_nlink++; |
1b2b2126 SF |
371 | /* BB should we make this contingent on superblock flag NOATIME? */ |
372 | /* old_file->d_inode->i_ctime = CURRENT_TIME;*/ | |
31ec35d6 SF |
373 | /* parent dir timestamps will update from srv |
374 | within a second, would it really be worth it | |
375 | to set the parent dir cifs inode time to zero | |
376 | to force revalidate (faster) for it too? */ | |
377 | } | |
fb8c4b14 | 378 | /* if not oplocked will force revalidate to get info |
31ec35d6 SF |
379 | on source file from srv */ |
380 | cifsInode->time = 0; | |
381 | ||
fb8c4b14 | 382 | /* Will update parent dir timestamps from srv within a second. |
31ec35d6 SF |
383 | Would it really be worth it to set the parent dir (cifs |
384 | inode) time field to zero to force revalidate on parent | |
fb8c4b14 | 385 | directory faster ie |
31ec35d6 | 386 | CIFS_I(inode)->time = 0; */ |
1da177e4 | 387 | } |
1da177e4 LT |
388 | |
389 | cifs_hl_exit: | |
f99d49ad JJ |
390 | kfree(fromName); |
391 | kfree(toName); | |
1da177e4 | 392 | FreeXid(xid); |
7ffec372 | 393 | cifs_put_tlink(tlink); |
1da177e4 LT |
394 | return rc; |
395 | } | |
396 | ||
cc314eef | 397 | void * |
1da177e4 LT |
398 | cifs_follow_link(struct dentry *direntry, struct nameidata *nd) |
399 | { | |
400 | struct inode *inode = direntry->d_inode; | |
8b6427a2 | 401 | int rc = -ENOMEM; |
1da177e4 LT |
402 | int xid; |
403 | char *full_path = NULL; | |
8b6427a2 JL |
404 | char *target_path = NULL; |
405 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 JL |
406 | struct tcon_link *tlink = NULL; |
407 | struct cifsTconInfo *tcon; | |
1da177e4 LT |
408 | |
409 | xid = GetXid(); | |
410 | ||
7ffec372 JL |
411 | tlink = cifs_sb_tlink(cifs_sb); |
412 | if (IS_ERR(tlink)) { | |
413 | rc = PTR_ERR(tlink); | |
414 | tlink = NULL; | |
415 | goto out; | |
416 | } | |
417 | tcon = tlink_tcon(tlink); | |
418 | ||
8b6427a2 JL |
419 | /* |
420 | * For now, we just handle symlinks with unix extensions enabled. | |
421 | * Eventually we should handle NTFS reparse points, and MacOS | |
422 | * symlink support. For instance... | |
423 | * | |
424 | * rc = CIFSSMBQueryReparseLinkInfo(...) | |
425 | * | |
426 | * For now, just return -EACCES when the server doesn't support posix | |
427 | * extensions. Note that we still allow querying symlinks when posix | |
428 | * extensions are manually disabled. We could disable these as well | |
429 | * but there doesn't seem to be any harm in allowing the client to | |
430 | * read them. | |
431 | */ | |
1b12b9c1 SM |
432 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
433 | && !(tcon->ses->capabilities & CAP_UNIX)) { | |
8b6427a2 JL |
434 | rc = -EACCES; |
435 | goto out; | |
436 | } | |
1da177e4 | 437 | |
8b6427a2 | 438 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 439 | if (!full_path) |
460b9696 | 440 | goto out; |
1da177e4 | 441 | |
b6b38f70 | 442 | cFYI(1, "Full path: %s inode = 0x%p", full_path, inode); |
1da177e4 | 443 | |
1b12b9c1 SM |
444 | rc = -EACCES; |
445 | /* | |
446 | * First try Minshall+French Symlinks, if configured | |
447 | * and fallback to UNIX Extensions Symlinks. | |
448 | */ | |
449 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) | |
450 | rc = CIFSQueryMFSymLink(xid, tcon, full_path, &target_path, | |
451 | cifs_sb->local_nls, | |
452 | cifs_sb->mnt_cifs_flags & | |
453 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
454 | ||
455 | if ((rc != 0) && (tcon->ses->capabilities & CAP_UNIX)) | |
456 | rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, &target_path, | |
457 | cifs_sb->local_nls); | |
458 | ||
8b6427a2 JL |
459 | kfree(full_path); |
460 | out: | |
460b9696 | 461 | if (rc != 0) { |
1da177e4 LT |
462 | kfree(target_path); |
463 | target_path = ERR_PTR(rc); | |
464 | } | |
465 | ||
1da177e4 | 466 | FreeXid(xid); |
7ffec372 JL |
467 | if (tlink) |
468 | cifs_put_tlink(tlink); | |
1da177e4 | 469 | nd_set_link(nd, target_path); |
460b9696 | 470 | return NULL; |
1da177e4 LT |
471 | } |
472 | ||
473 | int | |
474 | cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname) | |
475 | { | |
476 | int rc = -EOPNOTSUPP; | |
477 | int xid; | |
7ffec372 JL |
478 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
479 | struct tcon_link *tlink; | |
1da177e4 LT |
480 | struct cifsTconInfo *pTcon; |
481 | char *full_path = NULL; | |
482 | struct inode *newinode = NULL; | |
483 | ||
484 | xid = GetXid(); | |
485 | ||
7ffec372 JL |
486 | tlink = cifs_sb_tlink(cifs_sb); |
487 | if (IS_ERR(tlink)) { | |
488 | rc = PTR_ERR(tlink); | |
489 | goto symlink_exit; | |
490 | } | |
491 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 492 | |
7f57356b | 493 | full_path = build_path_from_dentry(direntry); |
fb8c4b14 | 494 | if (full_path == NULL) { |
0f3bc09e | 495 | rc = -ENOMEM; |
7ffec372 | 496 | goto symlink_exit; |
1da177e4 LT |
497 | } |
498 | ||
b6b38f70 JP |
499 | cFYI(1, "Full path: %s", full_path); |
500 | cFYI(1, "symname is %s", symname); | |
1da177e4 LT |
501 | |
502 | /* BB what if DFS and this volume is on different share? BB */ | |
1b12b9c1 SM |
503 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
504 | rc = CIFSCreateMFSymLink(xid, pTcon, full_path, symname, | |
505 | cifs_sb->local_nls, | |
506 | cifs_sb->mnt_cifs_flags & | |
507 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
508 | else if (pTcon->unix_ext) | |
1da177e4 LT |
509 | rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname, |
510 | cifs_sb->local_nls); | |
511 | /* else | |
fb8c4b14 SF |
512 | rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName, |
513 | cifs_sb_target->local_nls); */ | |
1da177e4 LT |
514 | |
515 | if (rc == 0) { | |
c18c842b | 516 | if (pTcon->unix_ext) |
1da177e4 | 517 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 518 | inode->i_sb, xid); |
1da177e4 LT |
519 | else |
520 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
8b1327f6 | 521 | inode->i_sb, xid, NULL); |
1da177e4 LT |
522 | |
523 | if (rc != 0) { | |
b6b38f70 JP |
524 | cFYI(1, "Create symlink ok, getinodeinfo fail rc = %d", |
525 | rc); | |
1da177e4 | 526 | } else { |
b92327fe SF |
527 | if (pTcon->nocase) |
528 | direntry->d_op = &cifs_ci_dentry_ops; | |
529 | else | |
530 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
531 | d_instantiate(direntry, newinode); |
532 | } | |
533 | } | |
7ffec372 | 534 | symlink_exit: |
f99d49ad | 535 | kfree(full_path); |
7ffec372 | 536 | cifs_put_tlink(tlink); |
1da177e4 LT |
537 | FreeXid(xid); |
538 | return rc; | |
539 | } | |
540 | ||
cc314eef | 541 | void cifs_put_link(struct dentry *direntry, struct nameidata *nd, void *cookie) |
1da177e4 LT |
542 | { |
543 | char *p = nd_get_link(nd); | |
544 | if (!IS_ERR(p)) | |
545 | kfree(p); | |
546 | } |