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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/dir.c | |
3 | * | |
4 | * vfs operations that deal with dentries | |
5 | * | |
83451879 | 6 | * Copyright (C) International Business Machines Corp., 2002,2005 |
1da177e4 LT |
7 | * Author(s): Steve French (sfrench@us.ibm.com) |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | #include <linux/fs.h> | |
24 | #include <linux/stat.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/namei.h> | |
27 | #include "cifsfs.h" | |
28 | #include "cifspdu.h" | |
29 | #include "cifsglob.h" | |
30 | #include "cifsproto.h" | |
31 | #include "cifs_debug.h" | |
32 | #include "cifs_fs_sb.h" | |
33 | ||
34 | void | |
35 | renew_parental_timestamps(struct dentry *direntry) | |
36 | { | |
37 | /* BB check if there is a way to get the kernel to do this or if we really need this */ | |
38 | do { | |
39 | direntry->d_time = jiffies; | |
40 | direntry = direntry->d_parent; | |
41 | } while (!IS_ROOT(direntry)); | |
42 | } | |
43 | ||
44 | /* Note: caller must free return buffer */ | |
45 | char * | |
46 | build_path_from_dentry(struct dentry *direntry) | |
47 | { | |
48 | struct dentry *temp; | |
49 | int namelen = 0; | |
50 | char *full_path; | |
88274815 | 51 | char dirsep; |
1da177e4 LT |
52 | |
53 | if(direntry == NULL) | |
54 | return NULL; /* not much we can do if dentry is freed and | |
55 | we need to reopen the file after it was closed implicitly | |
56 | when the server crashed */ | |
57 | ||
88274815 | 58 | dirsep = CIFS_DIR_SEP(CIFS_SB(direntry->d_sb)); |
1da177e4 LT |
59 | cifs_bp_rename_retry: |
60 | for (temp = direntry; !IS_ROOT(temp);) { | |
61 | namelen += (1 + temp->d_name.len); | |
62 | temp = temp->d_parent; | |
63 | if(temp == NULL) { | |
64 | cERROR(1,("corrupt dentry")); | |
65 | return NULL; | |
66 | } | |
67 | } | |
68 | ||
69 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
70 | if(full_path == NULL) | |
71 | return full_path; | |
72 | full_path[namelen] = 0; /* trailing null */ | |
73 | ||
74 | for (temp = direntry; !IS_ROOT(temp);) { | |
75 | namelen -= 1 + temp->d_name.len; | |
76 | if (namelen < 0) { | |
77 | break; | |
78 | } else { | |
7f57356b | 79 | full_path[namelen] = dirsep; |
1da177e4 LT |
80 | strncpy(full_path + namelen + 1, temp->d_name.name, |
81 | temp->d_name.len); | |
82 | cFYI(0, (" name: %s ", full_path + namelen)); | |
83 | } | |
84 | temp = temp->d_parent; | |
85 | if(temp == NULL) { | |
86 | cERROR(1,("corrupt dentry")); | |
87 | kfree(full_path); | |
88 | return NULL; | |
89 | } | |
90 | } | |
91 | if (namelen != 0) { | |
92 | cERROR(1, | |
93 | ("We did not end path lookup where we expected namelen is %d", | |
94 | namelen)); | |
95 | /* presumably this is only possible if we were racing with a rename | |
96 | of one of the parent directories (we can not lock the dentries | |
97 | above us to prevent this, but retrying should be harmless) */ | |
98 | kfree(full_path); | |
99 | namelen = 0; | |
100 | goto cifs_bp_rename_retry; | |
101 | } | |
102 | ||
103 | return full_path; | |
104 | } | |
105 | ||
737b758c | 106 | /* char * build_wildcard_path_from_dentry(struct dentry *direntry) |
1da177e4 | 107 | { |
1da177e4 LT |
108 | if(full_path == NULL) |
109 | return full_path; | |
110 | ||
111 | full_path[namelen] = '\\'; | |
112 | full_path[namelen+1] = '*'; | |
737b758c SF |
113 | full_path[namelen+2] = 0; |
114 | BB remove above eight lines BB */ | |
1da177e4 LT |
115 | |
116 | /* Inode operations in similar order to how they appear in the Linux file fs.h */ | |
117 | ||
118 | int | |
119 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
120 | struct nameidata *nd) | |
121 | { | |
122 | int rc = -ENOENT; | |
123 | int xid; | |
124 | int oplock = 0; | |
125 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; | |
126 | __u16 fileHandle; | |
127 | struct cifs_sb_info *cifs_sb; | |
128 | struct cifsTconInfo *pTcon; | |
129 | char *full_path = NULL; | |
130 | FILE_ALL_INFO * buf = NULL; | |
131 | struct inode *newinode = NULL; | |
132 | struct cifsFileInfo * pCifsFile = NULL; | |
133 | struct cifsInodeInfo * pCifsInode; | |
134 | int disposition = FILE_OVERWRITE_IF; | |
135 | int write_only = FALSE; | |
136 | ||
137 | xid = GetXid(); | |
138 | ||
139 | cifs_sb = CIFS_SB(inode->i_sb); | |
140 | pTcon = cifs_sb->tcon; | |
141 | ||
1da177e4 | 142 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
143 | if(full_path == NULL) { |
144 | FreeXid(xid); | |
145 | return -ENOMEM; | |
146 | } | |
147 | ||
e08fc045 MS |
148 | if(nd && (nd->flags & LOOKUP_OPEN)) { |
149 | int oflags = nd->intent.open.flags; | |
150 | ||
151 | desiredAccess = 0; | |
152 | if (oflags & FMODE_READ) | |
153 | desiredAccess |= GENERIC_READ; | |
154 | if (oflags & FMODE_WRITE) { | |
155 | desiredAccess |= GENERIC_WRITE; | |
156 | if (!(oflags & FMODE_READ)) | |
157 | write_only = TRUE; | |
1da177e4 LT |
158 | } |
159 | ||
e08fc045 | 160 | if((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 161 | disposition = FILE_CREATE; |
e08fc045 | 162 | else if((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 163 | disposition = FILE_OVERWRITE_IF; |
e08fc045 | 164 | else if((oflags & O_CREAT) == O_CREAT) |
1da177e4 LT |
165 | disposition = FILE_OPEN_IF; |
166 | else { | |
167 | cFYI(1,("Create flag not set in create function")); | |
168 | } | |
169 | } | |
170 | ||
171 | /* BB add processing to set equivalent of mode - e.g. via CreateX with ACLs */ | |
172 | if (oplockEnabled) | |
173 | oplock = REQ_OPLOCK; | |
174 | ||
175 | buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL); | |
176 | if(buf == NULL) { | |
177 | kfree(full_path); | |
178 | FreeXid(xid); | |
179 | return -ENOMEM; | |
180 | } | |
181 | ||
182 | rc = CIFSSMBOpen(xid, pTcon, full_path, disposition, | |
183 | desiredAccess, CREATE_NOT_DIR, | |
737b758c SF |
184 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
185 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
a9d02ad4 SF |
186 | if(rc == -EIO) { |
187 | /* old server, retry the open legacy style */ | |
188 | rc = SMBLegacyOpen(xid, pTcon, full_path, disposition, | |
189 | desiredAccess, CREATE_NOT_DIR, | |
190 | &fileHandle, &oplock, buf, cifs_sb->local_nls, | |
191 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
192 | } | |
1da177e4 LT |
193 | if (rc) { |
194 | cFYI(1, ("cifs_create returned 0x%x ", rc)); | |
195 | } else { | |
196 | /* If Open reported that we actually created a file | |
197 | then we now have to set the mode if possible */ | |
198 | if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX) && | |
199 | (oplock & CIFS_CREATE_ACTION)) | |
200 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
201 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, | |
83451879 SF |
202 | (__u64)current->fsuid, |
203 | (__u64)current->fsgid, | |
1da177e4 | 204 | 0 /* dev */, |
737b758c SF |
205 | cifs_sb->local_nls, |
206 | cifs_sb->mnt_cifs_flags & | |
207 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
208 | } else { |
209 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, | |
210 | (__u64)-1, | |
211 | (__u64)-1, | |
212 | 0 /* dev */, | |
737b758c SF |
213 | cifs_sb->local_nls, |
214 | cifs_sb->mnt_cifs_flags & | |
215 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
216 | } |
217 | else { | |
d7245c2c | 218 | /* BB implement mode setting via Windows security descriptors */ |
1da177e4 LT |
219 | /* eg CIFSSMBWinSetPerms(xid,pTcon,full_path,mode,-1,-1,local_nls);*/ |
220 | /* could set r/o dos attribute if mode & 0222 == 0 */ | |
221 | } | |
222 | ||
223 | /* BB server might mask mode so we have to query for Unix case*/ | |
224 | if (pTcon->ses->capabilities & CAP_UNIX) | |
225 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
226 | inode->i_sb,xid); | |
227 | else { | |
228 | rc = cifs_get_inode_info(&newinode, full_path, | |
229 | buf, inode->i_sb,xid); | |
6473a559 | 230 | if(newinode) { |
1da177e4 | 231 | newinode->i_mode = mode; |
6473a559 SF |
232 | if((oplock & CIFS_CREATE_ACTION) && |
233 | (cifs_sb->mnt_cifs_flags & | |
234 | CIFS_MOUNT_SET_UID)) { | |
235 | newinode->i_uid = current->fsuid; | |
236 | newinode->i_gid = current->fsgid; | |
237 | } | |
238 | } | |
1da177e4 LT |
239 | } |
240 | ||
241 | if (rc != 0) { | |
4a6d87f1 SF |
242 | cFYI(1, |
243 | ("Create worked but get_inode_info failed rc = %d", | |
1da177e4 LT |
244 | rc)); |
245 | } else { | |
b92327fe SF |
246 | if (pTcon->nocase) |
247 | direntry->d_op = &cifs_ci_dentry_ops; | |
248 | else | |
249 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
250 | d_instantiate(direntry, newinode); |
251 | } | |
252 | if((nd->flags & LOOKUP_OPEN) == FALSE) { | |
253 | /* mknod case - do not leave file open */ | |
254 | CIFSSMBClose(xid, pTcon, fileHandle); | |
255 | } else if(newinode) { | |
d14537f1 | 256 | pCifsFile = |
a048d7a8 | 257 | kzalloc(sizeof (struct cifsFileInfo), GFP_KERNEL); |
d14537f1 SF |
258 | |
259 | if(pCifsFile == NULL) | |
260 | goto cifs_create_out; | |
d14537f1 SF |
261 | pCifsFile->netfid = fileHandle; |
262 | pCifsFile->pid = current->tgid; | |
263 | pCifsFile->pInode = newinode; | |
264 | pCifsFile->invalidHandle = FALSE; | |
265 | pCifsFile->closePend = FALSE; | |
266 | init_MUTEX(&pCifsFile->fh_sem); | |
267 | /* set the following in open now | |
268 | pCifsFile->pfile = file; */ | |
269 | write_lock(&GlobalSMBSeslock); | |
270 | list_add(&pCifsFile->tlist,&pTcon->openFileList); | |
271 | pCifsInode = CIFS_I(newinode); | |
272 | if(pCifsInode) { | |
1da177e4 | 273 | /* if readable file instance put first in list*/ |
d14537f1 SF |
274 | if (write_only == TRUE) { |
275 | list_add_tail(&pCifsFile->flist, | |
276 | &pCifsInode->openFileList); | |
277 | } else { | |
278 | list_add(&pCifsFile->flist, | |
279 | &pCifsInode->openFileList); | |
1da177e4 | 280 | } |
d14537f1 SF |
281 | if((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
282 | pCifsInode->clientCanCacheAll = TRUE; | |
283 | pCifsInode->clientCanCacheRead = TRUE; | |
284 | cFYI(1,("Exclusive Oplock for inode %p", | |
285 | newinode)); | |
286 | } else if((oplock & 0xF) == OPLOCK_READ) | |
287 | pCifsInode->clientCanCacheRead = TRUE; | |
1da177e4 | 288 | } |
d14537f1 | 289 | write_unlock(&GlobalSMBSeslock); |
1da177e4 LT |
290 | } |
291 | } | |
d14537f1 SF |
292 | cifs_create_out: |
293 | kfree(buf); | |
294 | kfree(full_path); | |
1da177e4 | 295 | FreeXid(xid); |
1da177e4 LT |
296 | return rc; |
297 | } | |
298 | ||
86c96b4b SF |
299 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
300 | dev_t device_number) | |
1da177e4 LT |
301 | { |
302 | int rc = -EPERM; | |
303 | int xid; | |
304 | struct cifs_sb_info *cifs_sb; | |
305 | struct cifsTconInfo *pTcon; | |
306 | char *full_path = NULL; | |
307 | struct inode * newinode = NULL; | |
308 | ||
309 | if (!old_valid_dev(device_number)) | |
310 | return -EINVAL; | |
311 | ||
312 | xid = GetXid(); | |
313 | ||
314 | cifs_sb = CIFS_SB(inode->i_sb); | |
315 | pTcon = cifs_sb->tcon; | |
316 | ||
1da177e4 | 317 | full_path = build_path_from_dentry(direntry); |
1da177e4 LT |
318 | if(full_path == NULL) |
319 | rc = -ENOMEM; | |
4a6d87f1 | 320 | else if (pTcon->ses->capabilities & CAP_UNIX) { |
1da177e4 LT |
321 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
322 | rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, | |
83451879 | 323 | mode,(__u64)current->fsuid,(__u64)current->fsgid, |
737b758c SF |
324 | device_number, cifs_sb->local_nls, |
325 | cifs_sb->mnt_cifs_flags & | |
326 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
327 | } else { |
328 | rc = CIFSSMBUnixSetPerms(xid, pTcon, | |
329 | full_path, mode, (__u64)-1, (__u64)-1, | |
737b758c SF |
330 | device_number, cifs_sb->local_nls, |
331 | cifs_sb->mnt_cifs_flags & | |
332 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
333 | } |
334 | ||
335 | if(!rc) { | |
336 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
337 | inode->i_sb,xid); | |
b92327fe SF |
338 | if (pTcon->nocase) |
339 | direntry->d_op = &cifs_ci_dentry_ops; | |
340 | else | |
341 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
342 | if(rc == 0) |
343 | d_instantiate(direntry, newinode); | |
344 | } | |
d7245c2c | 345 | } else { |
eda3c029 SF |
346 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
347 | int oplock = 0; | |
348 | u16 fileHandle; | |
349 | FILE_ALL_INFO * buf; | |
d7245c2c SF |
350 | |
351 | cFYI(1,("sfu compat create special file")); | |
d7245c2c | 352 | |
eda3c029 SF |
353 | buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL); |
354 | if(buf == NULL) { | |
355 | kfree(full_path); | |
356 | FreeXid(xid); | |
357 | return -ENOMEM; | |
358 | } | |
359 | ||
360 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
361 | FILE_CREATE, /* fail if exists */ | |
362 | GENERIC_WRITE /* BB would | |
363 | WRITE_OWNER | WRITE_DAC be better? */, | |
364 | /* Create a file and set the | |
365 | file attribute to SYSTEM */ | |
366 | CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
367 | &fileHandle, &oplock, buf, | |
368 | cifs_sb->local_nls, | |
369 | cifs_sb->mnt_cifs_flags & | |
370 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
371 | ||
372 | if(!rc) { | |
373 | /* BB Do not bother to decode buf since no | |
86c96b4b SF |
374 | local inode yet to put timestamps in, |
375 | but we can reuse it safely */ | |
376 | int bytes_written; | |
377 | struct win_dev *pdev; | |
378 | pdev = (struct win_dev *)buf; | |
379 | if(S_ISCHR(mode)) { | |
380 | memcpy(pdev->type, "IntxCHR", 8); | |
381 | pdev->major = | |
382 | cpu_to_le64(MAJOR(device_number)); | |
383 | pdev->minor = | |
384 | cpu_to_le64(MINOR(device_number)); | |
385 | rc = CIFSSMBWrite(xid, pTcon, | |
386 | fileHandle, | |
387 | sizeof(struct win_dev), | |
388 | 0, &bytes_written, (char *)pdev, | |
389 | NULL, 0); | |
390 | } else if(S_ISBLK(mode)) { | |
391 | memcpy(pdev->type, "IntxBLK", 8); | |
392 | pdev->major = | |
393 | cpu_to_le64(MAJOR(device_number)); | |
394 | pdev->minor = | |
395 | cpu_to_le64(MINOR(device_number)); | |
396 | rc = CIFSSMBWrite(xid, pTcon, | |
397 | fileHandle, | |
398 | sizeof(struct win_dev), | |
399 | 0, &bytes_written, (char *)pdev, | |
400 | NULL, 0); | |
401 | } /* else if(S_ISFIFO */ | |
eda3c029 SF |
402 | CIFSSMBClose(xid, pTcon, fileHandle); |
403 | d_drop(direntry); | |
404 | } | |
405 | kfree(buf); | |
d7245c2c SF |
406 | /* add code here to set EAs */ |
407 | } | |
1da177e4 LT |
408 | } |
409 | ||
d14537f1 | 410 | kfree(full_path); |
1da177e4 | 411 | FreeXid(xid); |
1da177e4 LT |
412 | return rc; |
413 | } | |
414 | ||
415 | ||
416 | struct dentry * | |
417 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, struct nameidata *nd) | |
418 | { | |
419 | int xid; | |
420 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
421 | struct cifs_sb_info *cifs_sb; | |
422 | struct cifsTconInfo *pTcon; | |
423 | struct inode *newInode = NULL; | |
424 | char *full_path = NULL; | |
425 | ||
426 | xid = GetXid(); | |
427 | ||
428 | cFYI(1, | |
429 | (" parent inode = 0x%p name is: %s and dentry = 0x%p", | |
430 | parent_dir_inode, direntry->d_name.name, direntry)); | |
431 | ||
432 | /* BB Add check of incoming data - e.g. frame not longer than maximum SMB - let server check the namelen BB */ | |
433 | ||
434 | /* check whether path exists */ | |
435 | ||
436 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
437 | pTcon = cifs_sb->tcon; | |
438 | ||
296034f7 SF |
439 | /* |
440 | * Don't allow the separator character in a path component. | |
441 | * The VFS will not allow "/", but "\" is allowed by posix. | |
442 | */ | |
443 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
444 | int i; | |
445 | for (i = 0; i < direntry->d_name.len; i++) | |
446 | if (direntry->d_name.name[i] == '\\') { | |
447 | cFYI(1, ("Invalid file name")); | |
448 | FreeXid(xid); | |
449 | return ERR_PTR(-EINVAL); | |
450 | } | |
451 | } | |
452 | ||
1da177e4 LT |
453 | /* can not grab the rename sem here since it would |
454 | deadlock in the cases (beginning of sys_rename itself) | |
455 | in which we already have the sb rename sem */ | |
456 | full_path = build_path_from_dentry(direntry); | |
457 | if(full_path == NULL) { | |
458 | FreeXid(xid); | |
459 | return ERR_PTR(-ENOMEM); | |
460 | } | |
461 | ||
462 | if (direntry->d_inode != NULL) { | |
463 | cFYI(1, (" non-NULL inode in lookup")); | |
464 | } else { | |
465 | cFYI(1, (" NULL inode in lookup")); | |
466 | } | |
467 | cFYI(1, | |
468 | (" Full path: %s inode = 0x%p", full_path, direntry->d_inode)); | |
469 | ||
470 | if (pTcon->ses->capabilities & CAP_UNIX) | |
471 | rc = cifs_get_inode_info_unix(&newInode, full_path, | |
472 | parent_dir_inode->i_sb,xid); | |
473 | else | |
474 | rc = cifs_get_inode_info(&newInode, full_path, NULL, | |
475 | parent_dir_inode->i_sb,xid); | |
476 | ||
477 | if ((rc == 0) && (newInode != NULL)) { | |
b92327fe SF |
478 | if (pTcon->nocase) |
479 | direntry->d_op = &cifs_ci_dentry_ops; | |
480 | else | |
481 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
482 | d_add(direntry, newInode); |
483 | ||
3abb9272 SF |
484 | /* since paths are not looked up by component - the parent |
485 | directories are presumed to be good here */ | |
1da177e4 LT |
486 | renew_parental_timestamps(direntry); |
487 | ||
488 | } else if (rc == -ENOENT) { | |
489 | rc = 0; | |
3abb9272 SF |
490 | direntry->d_time = jiffies; |
491 | if (pTcon->nocase) | |
492 | direntry->d_op = &cifs_ci_dentry_ops; | |
493 | else | |
494 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 495 | d_add(direntry, NULL); |
3abb9272 SF |
496 | /* if it was once a directory (but how can we tell?) we could do |
497 | shrink_dcache_parent(direntry); */ | |
1da177e4 | 498 | } else { |
b2aeb9d5 SF |
499 | cERROR(1,("Error 0x%x on cifs_get_inode_info in lookup of %s", |
500 | rc,full_path)); | |
1da177e4 LT |
501 | /* BB special case check for Access Denied - watch security |
502 | exposure of returning dir info implicitly via different rc | |
503 | if file exists or not but no access BB */ | |
504 | } | |
505 | ||
d14537f1 | 506 | kfree(full_path); |
1da177e4 LT |
507 | FreeXid(xid); |
508 | return ERR_PTR(rc); | |
509 | } | |
510 | ||
1da177e4 LT |
511 | static int |
512 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
513 | { | |
514 | int isValid = 1; | |
515 | ||
1da177e4 LT |
516 | if (direntry->d_inode) { |
517 | if (cifs_revalidate(direntry)) { | |
1da177e4 LT |
518 | return 0; |
519 | } | |
520 | } else { | |
3abb9272 SF |
521 | cFYI(1, ("neg dentry 0x%p name = %s", |
522 | direntry, direntry->d_name.name)); | |
523 | if(time_after(jiffies, direntry->d_time + HZ) || | |
524 | !lookupCacheEnabled) { | |
525 | d_drop(direntry); | |
526 | isValid = 0; | |
527 | } | |
1da177e4 LT |
528 | } |
529 | ||
1da177e4 LT |
530 | return isValid; |
531 | } | |
532 | ||
533 | /* static int cifs_d_delete(struct dentry *direntry) | |
534 | { | |
535 | int rc = 0; | |
536 | ||
537 | cFYI(1, ("In cifs d_delete, name = %s", direntry->d_name.name)); | |
538 | ||
539 | return rc; | |
540 | } */ | |
541 | ||
542 | struct dentry_operations cifs_dentry_ops = { | |
543 | .d_revalidate = cifs_d_revalidate, | |
544 | /* d_delete: cifs_d_delete, *//* not needed except for debugging */ | |
545 | /* no need for d_hash, d_compare, d_release, d_iput ... yet. BB confirm this BB */ | |
546 | }; | |
b92327fe SF |
547 | |
548 | static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) | |
549 | { | |
550 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
551 | unsigned long hash; | |
552 | int i; | |
553 | ||
554 | hash = init_name_hash(); | |
555 | for (i = 0; i < q->len; i++) | |
556 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
557 | hash); | |
558 | q->hash = end_name_hash(hash); | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
563 | static int cifs_ci_compare(struct dentry *dentry, struct qstr *a, | |
564 | struct qstr *b) | |
565 | { | |
566 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
567 | ||
568 | if ((a->len == b->len) && | |
569 | (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) { | |
570 | /* | |
571 | * To preserve case, don't let an existing negative dentry's | |
572 | * case take precedence. If a is not a negative dentry, this | |
573 | * should have no side effects | |
574 | */ | |
575 | memcpy((unsigned char *)a->name, b->name, a->len); | |
576 | return 0; | |
577 | } | |
578 | return 1; | |
579 | } | |
580 | ||
581 | struct dentry_operations cifs_ci_dentry_ops = { | |
582 | .d_revalidate = cifs_d_revalidate, | |
583 | .d_hash = cifs_ci_hash, | |
584 | .d_compare = cifs_ci_compare, | |
585 | }; |