1 // SPDX-License-Identifier: LGPL-2.1
2 /*
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 */
8 #include <linux/fs.h>
9 #include <linux/stat.h>
10 #include <linux/slab.h>
11 #include <linux/namei.h>
12 #include "cifsfs.h"
13 #include "cifspdu.h"
14 #include "cifsglob.h"
15 #include "cifsproto.h"
16 #include "cifs_debug.h"
17 #include "cifs_fs_sb.h"
18 #include "cifs_unicode.h"
19 #include "smb2proto.h"
20 #include "cifs_ioctl.h"
21
22 /*
23 * M-F Symlink Functions - Begin
24 */
25
26 #define CIFS_MF_SYMLINK_LEN_OFFSET (4+1)
27 #define CIFS_MF_SYMLINK_MD5_OFFSET (CIFS_MF_SYMLINK_LEN_OFFSET+(4+1))
28 #define CIFS_MF_SYMLINK_LINK_OFFSET (CIFS_MF_SYMLINK_MD5_OFFSET+(32+1))
29 #define CIFS_MF_SYMLINK_LINK_MAXLEN (1024)
30 #define CIFS_MF_SYMLINK_FILE_SIZE \
31 (CIFS_MF_SYMLINK_LINK_OFFSET + CIFS_MF_SYMLINK_LINK_MAXLEN)
32
33 #define CIFS_MF_SYMLINK_LEN_FORMAT "XSym\n%04u\n"
34 #define CIFS_MF_SYMLINK_MD5_FORMAT "%16phN\n"
35 #define CIFS_MF_SYMLINK_MD5_ARGS(md5_hash) md5_hash
36
37 static int
symlink_hash(unsigned int link_len,const char * link_str,u8 * md5_hash)38 symlink_hash(unsigned int link_len, const char *link_str, u8 *md5_hash)
39 {
40 int rc;
41 struct shash_desc *md5 = NULL;
42
43 rc = cifs_alloc_hash("md5", &md5);
44 if (rc)
45 goto symlink_hash_err;
46
47 rc = crypto_shash_init(md5);
48 if (rc) {
49 cifs_dbg(VFS, "%s: Could not init md5 shash\n", __func__);
50 goto symlink_hash_err;
51 }
52 rc = crypto_shash_update(md5, link_str, link_len);
53 if (rc) {
54 cifs_dbg(VFS, "%s: Could not update with link_str\n", __func__);
55 goto symlink_hash_err;
56 }
57 rc = crypto_shash_final(md5, md5_hash);
58 if (rc)
59 cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
60
61 symlink_hash_err:
62 cifs_free_hash(&md5);
63 return rc;
64 }
65
66 static int
parse_mf_symlink(const u8 * buf,unsigned int buf_len,unsigned int * _link_len,char ** _link_str)67 parse_mf_symlink(const u8 *buf, unsigned int buf_len, unsigned int *_link_len,
68 char **_link_str)
69 {
70 int rc;
71 unsigned int link_len;
72 const char *md5_str1;
73 const char *link_str;
74 u8 md5_hash[16];
75 char md5_str2[34];
76
77 if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE)
78 return -EINVAL;
79
80 md5_str1 = (const char *)&buf[CIFS_MF_SYMLINK_MD5_OFFSET];
81 link_str = (const char *)&buf[CIFS_MF_SYMLINK_LINK_OFFSET];
82
83 rc = sscanf(buf, CIFS_MF_SYMLINK_LEN_FORMAT, &link_len);
84 if (rc != 1)
85 return -EINVAL;
86
87 if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN)
88 return -EINVAL;
89
90 rc = symlink_hash(link_len, link_str, md5_hash);
91 if (rc) {
92 cifs_dbg(FYI, "%s: MD5 hash failure: %d\n", __func__, rc);
93 return rc;
94 }
95
96 scnprintf(md5_str2, sizeof(md5_str2),
97 CIFS_MF_SYMLINK_MD5_FORMAT,
98 CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
99
100 if (strncmp(md5_str1, md5_str2, 17) != 0)
101 return -EINVAL;
102
103 if (_link_str) {
104 *_link_str = kstrndup(link_str, link_len, GFP_KERNEL);
105 if (!*_link_str)
106 return -ENOMEM;
107 }
108
109 *_link_len = link_len;
110 return 0;
111 }
112
113 static int
format_mf_symlink(u8 * buf,unsigned int buf_len,const char * link_str)114 format_mf_symlink(u8 *buf, unsigned int buf_len, const char *link_str)
115 {
116 int rc;
117 unsigned int link_len;
118 unsigned int ofs;
119 u8 md5_hash[16];
120
121 if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE)
122 return -EINVAL;
123
124 link_len = strlen(link_str);
125
126 if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN)
127 return -ENAMETOOLONG;
128
129 rc = symlink_hash(link_len, link_str, md5_hash);
130 if (rc) {
131 cifs_dbg(FYI, "%s: MD5 hash failure: %d\n", __func__, rc);
132 return rc;
133 }
134
135 scnprintf(buf, buf_len,
136 CIFS_MF_SYMLINK_LEN_FORMAT CIFS_MF_SYMLINK_MD5_FORMAT,
137 link_len,
138 CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
139
140 ofs = CIFS_MF_SYMLINK_LINK_OFFSET;
141 memcpy(buf + ofs, link_str, link_len);
142
143 ofs += link_len;
144 if (ofs < CIFS_MF_SYMLINK_FILE_SIZE) {
145 buf[ofs] = '\n';
146 ofs++;
147 }
148
149 while (ofs < CIFS_MF_SYMLINK_FILE_SIZE) {
150 buf[ofs] = ' ';
151 ofs++;
152 }
153
154 return 0;
155 }
156
157 bool
couldbe_mf_symlink(const struct cifs_fattr * fattr)158 couldbe_mf_symlink(const struct cifs_fattr *fattr)
159 {
160 if (!S_ISREG(fattr->cf_mode))
161 /* it's not a symlink */
162 return false;
163
164 if (fattr->cf_eof != CIFS_MF_SYMLINK_FILE_SIZE)
165 /* it's not a symlink */
166 return false;
167
168 return true;
169 }
170
171 static int
create_mf_symlink(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * fromName,const char * toName)172 create_mf_symlink(const unsigned int xid, struct cifs_tcon *tcon,
173 struct cifs_sb_info *cifs_sb, const char *fromName,
174 const char *toName)
175 {
176 int rc;
177 u8 *buf;
178 unsigned int bytes_written = 0;
179
180 buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL);
181 if (!buf)
182 return -ENOMEM;
183
184 rc = format_mf_symlink(buf, CIFS_MF_SYMLINK_FILE_SIZE, toName);
185 if (rc)
186 goto out;
187
188 if (tcon->ses->server->ops->create_mf_symlink)
189 rc = tcon->ses->server->ops->create_mf_symlink(xid, tcon,
190 cifs_sb, fromName, buf, &bytes_written);
191 else
192 rc = -EOPNOTSUPP;
193
194 if (rc)
195 goto out;
196
197 if (bytes_written != CIFS_MF_SYMLINK_FILE_SIZE)
198 rc = -EIO;
199 out:
200 kfree(buf);
201 return rc;
202 }
203
204 int
check_mf_symlink(unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,struct cifs_fattr * fattr,const unsigned char * path)205 check_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
206 struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr,
207 const unsigned char *path)
208 {
209 int rc;
210 u8 *buf = NULL;
211 unsigned int link_len = 0;
212 unsigned int bytes_read = 0;
213 char *symlink = NULL;
214
215 if (!couldbe_mf_symlink(fattr))
216 /* it's not a symlink */
217 return 0;
218
219 buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL);
220 if (!buf)
221 return -ENOMEM;
222
223 if (tcon->ses->server->ops->query_mf_symlink)
224 rc = tcon->ses->server->ops->query_mf_symlink(xid, tcon,
225 cifs_sb, path, buf, &bytes_read);
226 else
227 rc = -ENOSYS;
228
229 if (rc)
230 goto out;
231
232 if (bytes_read == 0) /* not a symlink */
233 goto out;
234
235 rc = parse_mf_symlink(buf, bytes_read, &link_len, &symlink);
236 if (rc == -EINVAL) {
237 /* it's not a symlink */
238 rc = 0;
239 goto out;
240 }
241
242 if (rc != 0)
243 goto out;
244
245 /* it is a symlink */
246 fattr->cf_eof = link_len;
247 fattr->cf_mode &= ~S_IFMT;
248 fattr->cf_mode |= S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO;
249 fattr->cf_dtype = DT_LNK;
250 fattr->cf_symlink_target = symlink;
251 out:
252 kfree(buf);
253 return rc;
254 }
255
256 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
257 /*
258 * SMB 1.0 Protocol specific functions
259 */
260
261 int
cifs_query_mf_symlink(unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const unsigned char * path,char * pbuf,unsigned int * pbytes_read)262 cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
263 struct cifs_sb_info *cifs_sb, const unsigned char *path,
264 char *pbuf, unsigned int *pbytes_read)
265 {
266 int rc;
267 int oplock = 0;
268 struct cifs_fid fid;
269 struct cifs_open_parms oparms;
270 struct cifs_io_parms io_parms = {0};
271 int buf_type = CIFS_NO_BUFFER;
272 FILE_ALL_INFO file_info;
273
274 oparms = (struct cifs_open_parms) {
275 .tcon = tcon,
276 .cifs_sb = cifs_sb,
277 .desired_access = GENERIC_READ,
278 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
279 .disposition = FILE_OPEN,
280 .path = path,
281 .fid = &fid,
282 };
283
284 rc = CIFS_open(xid, &oparms, &oplock, &file_info);
285 if (rc)
286 return rc;
287
288 if (file_info.EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
289 rc = -ENOENT;
290 /* it's not a symlink */
291 goto out;
292 }
293
294 io_parms.netfid = fid.netfid;
295 io_parms.pid = current->tgid;
296 io_parms.tcon = tcon;
297 io_parms.offset = 0;
298 io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
299
300 rc = CIFSSMBRead(xid, &io_parms, pbytes_read, &pbuf, &buf_type);
301 out:
302 CIFSSMBClose(xid, tcon, fid.netfid);
303 return rc;
304 }
305
306 int
cifs_create_mf_symlink(unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const unsigned char * path,char * pbuf,unsigned int * pbytes_written)307 cifs_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
308 struct cifs_sb_info *cifs_sb, const unsigned char *path,
309 char *pbuf, unsigned int *pbytes_written)
310 {
311 int rc;
312 int oplock = 0;
313 struct cifs_fid fid;
314 struct cifs_open_parms oparms;
315 struct cifs_io_parms io_parms = {0};
316
317 oparms = (struct cifs_open_parms) {
318 .tcon = tcon,
319 .cifs_sb = cifs_sb,
320 .desired_access = GENERIC_WRITE,
321 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
322 .disposition = FILE_CREATE,
323 .path = path,
324 .fid = &fid,
325 };
326
327 rc = CIFS_open(xid, &oparms, &oplock, NULL);
328 if (rc)
329 return rc;
330
331 io_parms.netfid = fid.netfid;
332 io_parms.pid = current->tgid;
333 io_parms.tcon = tcon;
334 io_parms.offset = 0;
335 io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
336
337 rc = CIFSSMBWrite(xid, &io_parms, pbytes_written, pbuf);
338 CIFSSMBClose(xid, tcon, fid.netfid);
339 return rc;
340 }
341 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
342
343 /*
344 * SMB 2.1/SMB3 Protocol specific functions
345 */
346 int
smb3_query_mf_symlink(unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const unsigned char * path,char * pbuf,unsigned int * pbytes_read)347 smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
348 struct cifs_sb_info *cifs_sb, const unsigned char *path,
349 char *pbuf, unsigned int *pbytes_read)
350 {
351 int rc;
352 struct cifs_fid fid;
353 struct cifs_open_parms oparms;
354 struct cifs_io_parms io_parms = {0};
355 int buf_type = CIFS_NO_BUFFER;
356 __le16 *utf16_path;
357 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
358 struct smb2_file_all_info *pfile_info = NULL;
359
360 oparms = (struct cifs_open_parms) {
361 .tcon = tcon,
362 .cifs_sb = cifs_sb,
363 .desired_access = GENERIC_READ,
364 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
365 .disposition = FILE_OPEN,
366 .fid = &fid,
367 };
368
369 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
370 if (utf16_path == NULL)
371 return -ENOMEM;
372
373 pfile_info = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
374 GFP_KERNEL);
375
376 if (pfile_info == NULL) {
377 kfree(utf16_path);
378 return -ENOMEM;
379 }
380
381 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, pfile_info, NULL,
382 NULL, NULL);
383 if (rc)
384 goto qmf_out_open_fail;
385
386 if (pfile_info->EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
387 /* it's not a symlink */
388 rc = -ENOENT; /* Is there a better rc to return? */
389 goto qmf_out;
390 }
391
392 io_parms.netfid = fid.netfid;
393 io_parms.pid = current->tgid;
394 io_parms.tcon = tcon;
395 io_parms.offset = 0;
396 io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
397 io_parms.persistent_fid = fid.persistent_fid;
398 io_parms.volatile_fid = fid.volatile_fid;
399 rc = SMB2_read(xid, &io_parms, pbytes_read, &pbuf, &buf_type);
400 qmf_out:
401 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
402 qmf_out_open_fail:
403 kfree(utf16_path);
404 kfree(pfile_info);
405 return rc;
406 }
407
408 int
smb3_create_mf_symlink(unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const unsigned char * path,char * pbuf,unsigned int * pbytes_written)409 smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
410 struct cifs_sb_info *cifs_sb, const unsigned char *path,
411 char *pbuf, unsigned int *pbytes_written)
412 {
413 int rc;
414 struct cifs_fid fid;
415 struct cifs_open_parms oparms;
416 struct cifs_io_parms io_parms = {0};
417 __le16 *utf16_path;
418 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
419 struct kvec iov[2];
420
421 cifs_dbg(FYI, "%s: path: %s\n", __func__, path);
422
423 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
424 if (!utf16_path)
425 return -ENOMEM;
426
427 oparms = (struct cifs_open_parms) {
428 .tcon = tcon,
429 .cifs_sb = cifs_sb,
430 .desired_access = GENERIC_WRITE,
431 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
432 .disposition = FILE_CREATE,
433 .fid = &fid,
434 .mode = 0644,
435 };
436
437 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
438 NULL, NULL);
439 if (rc) {
440 kfree(utf16_path);
441 return rc;
442 }
443
444 io_parms.netfid = fid.netfid;
445 io_parms.pid = current->tgid;
446 io_parms.tcon = tcon;
447 io_parms.offset = 0;
448 io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
449 io_parms.persistent_fid = fid.persistent_fid;
450 io_parms.volatile_fid = fid.volatile_fid;
451
452 /* iov[0] is reserved for smb header */
453 iov[1].iov_base = pbuf;
454 iov[1].iov_len = CIFS_MF_SYMLINK_FILE_SIZE;
455
456 rc = SMB2_write(xid, &io_parms, pbytes_written, iov, 1);
457
458 /* Make sure we wrote all of the symlink data */
459 if ((rc == 0) && (*pbytes_written != CIFS_MF_SYMLINK_FILE_SIZE))
460 rc = -EIO;
461
462 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
463
464 kfree(utf16_path);
465 return rc;
466 }
467
468 /*
469 * M-F Symlink Functions - End
470 */
471
472 int
cifs_hardlink(struct dentry * old_file,struct inode * inode,struct dentry * direntry)473 cifs_hardlink(struct dentry *old_file, struct inode *inode,
474 struct dentry *direntry)
475 {
476 int rc = -EACCES;
477 unsigned int xid;
478 const char *from_name, *to_name;
479 void *page1, *page2;
480 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
481 struct tcon_link *tlink;
482 struct cifs_tcon *tcon;
483 struct TCP_Server_Info *server;
484 struct cifsInodeInfo *cifsInode;
485
486 if (unlikely(cifs_forced_shutdown(cifs_sb)))
487 return -EIO;
488
489 tlink = cifs_sb_tlink(cifs_sb);
490 if (IS_ERR(tlink))
491 return PTR_ERR(tlink);
492 tcon = tlink_tcon(tlink);
493
494 xid = get_xid();
495 page1 = alloc_dentry_path();
496 page2 = alloc_dentry_path();
497
498 from_name = build_path_from_dentry(old_file, page1);
499 if (IS_ERR(from_name)) {
500 rc = PTR_ERR(from_name);
501 goto cifs_hl_exit;
502 }
503 to_name = build_path_from_dentry(direntry, page2);
504 if (IS_ERR(to_name)) {
505 rc = PTR_ERR(to_name);
506 goto cifs_hl_exit;
507 }
508
509 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
510 if (tcon->unix_ext)
511 rc = CIFSUnixCreateHardLink(xid, tcon, from_name, to_name,
512 cifs_sb->local_nls,
513 cifs_remap(cifs_sb));
514 else {
515 #else
516 {
517 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
518 server = tcon->ses->server;
519 if (!server->ops->create_hardlink) {
520 rc = -ENOSYS;
521 goto cifs_hl_exit;
522 }
523 rc = server->ops->create_hardlink(xid, tcon, from_name, to_name,
524 cifs_sb);
525 if ((rc == -EIO) || (rc == -EINVAL))
526 rc = -EOPNOTSUPP;
527 }
528
529 d_drop(direntry); /* force new lookup from server of target */
530
531 /*
532 * if source file is cached (oplocked) revalidate will not go to server
533 * until the file is closed or oplock broken so update nlinks locally
534 */
535 if (d_really_is_positive(old_file)) {
536 cifsInode = CIFS_I(d_inode(old_file));
537 if (rc == 0) {
538 spin_lock(&d_inode(old_file)->i_lock);
539 inc_nlink(d_inode(old_file));
540 spin_unlock(&d_inode(old_file)->i_lock);
541
542 /*
543 * parent dir timestamps will update from srv within a
544 * second, would it really be worth it to set the parent
545 * dir cifs inode time to zero to force revalidate
546 * (faster) for it too?
547 */
548 }
549 /*
550 * if not oplocked will force revalidate to get info on source
551 * file from srv. Note Samba server prior to 4.2 has bug -
552 * not updating src file ctime on hardlinks but Windows servers
553 * handle it properly
554 */
555 cifsInode->time = 0;
556
557 /*
558 * Will update parent dir timestamps from srv within a second.
559 * Would it really be worth it to set the parent dir (cifs
560 * inode) time field to zero to force revalidate on parent
561 * directory faster ie
562 *
563 * CIFS_I(inode)->time = 0;
564 */
565 }
566
567 cifs_hl_exit:
568 free_dentry_path(page1);
569 free_dentry_path(page2);
570 free_xid(xid);
571 cifs_put_tlink(tlink);
572 return rc;
573 }
574
575 int
576 cifs_symlink(struct mnt_idmap *idmap, struct inode *inode,
577 struct dentry *direntry, const char *symname)
578 {
579 int rc = -EOPNOTSUPP;
580 unsigned int xid;
581 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
582 struct tcon_link *tlink;
583 struct cifs_tcon *pTcon;
584 const char *full_path;
585 void *page;
586 struct inode *newinode = NULL;
587
588 if (unlikely(cifs_forced_shutdown(cifs_sb)))
589 return -EIO;
590
591 page = alloc_dentry_path();
592 if (!page)
593 return -ENOMEM;
594
595 xid = get_xid();
596
597 tlink = cifs_sb_tlink(cifs_sb);
598 if (IS_ERR(tlink)) {
599 rc = PTR_ERR(tlink);
600 goto symlink_exit;
601 }
602 pTcon = tlink_tcon(tlink);
603
604 full_path = build_path_from_dentry(direntry, page);
605 if (IS_ERR(full_path)) {
606 rc = PTR_ERR(full_path);
607 goto symlink_exit;
608 }
609
610 cifs_dbg(FYI, "Full path: %s\n", full_path);
611 cifs_dbg(FYI, "symname is %s\n", symname);
612
613 /* BB what if DFS and this volume is on different share? BB */
614 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
615 rc = create_mf_symlink(xid, pTcon, cifs_sb, full_path, symname);
616 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
617 else if (pTcon->unix_ext)
618 rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname,
619 cifs_sb->local_nls,
620 cifs_remap(cifs_sb));
621 #endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
622 /* else
623 rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName,
624 cifs_sb_target->local_nls); */
625
626 if (rc == 0) {
627 if (pTcon->posix_extensions)
628 rc = smb311_posix_get_inode_info(&newinode, full_path, inode->i_sb, xid);
629 else if (pTcon->unix_ext)
630 rc = cifs_get_inode_info_unix(&newinode, full_path,
631 inode->i_sb, xid);
632 else
633 rc = cifs_get_inode_info(&newinode, full_path, NULL,
634 inode->i_sb, xid, NULL);
635
636 if (rc != 0) {
637 cifs_dbg(FYI, "Create symlink ok, getinodeinfo fail rc = %d\n",
638 rc);
639 } else {
640 d_instantiate(direntry, newinode);
641 }
642 }
643 symlink_exit:
644 free_dentry_path(page);
645 cifs_put_tlink(tlink);
646 free_xid(xid);
647 return rc;
648 }
649