Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/dir.c | |
3 | * | |
4 | * vfs operations that deal with dentries | |
5 | * | |
6 | * Copyright (C) International Business Machines Corp., 2002,2003 | |
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; | |
7f57356b | 51 | char dirsep = CIFS_DIR_SEP(CIFS_SB(direntry->d_sb)); |
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 | ||
58 | cifs_bp_rename_retry: | |
59 | for (temp = direntry; !IS_ROOT(temp);) { | |
60 | namelen += (1 + temp->d_name.len); | |
61 | temp = temp->d_parent; | |
62 | if(temp == NULL) { | |
63 | cERROR(1,("corrupt dentry")); | |
64 | return NULL; | |
65 | } | |
66 | } | |
67 | ||
68 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
69 | if(full_path == NULL) | |
70 | return full_path; | |
71 | full_path[namelen] = 0; /* trailing null */ | |
72 | ||
73 | for (temp = direntry; !IS_ROOT(temp);) { | |
74 | namelen -= 1 + temp->d_name.len; | |
75 | if (namelen < 0) { | |
76 | break; | |
77 | } else { | |
7f57356b | 78 | full_path[namelen] = dirsep; |
1da177e4 LT |
79 | strncpy(full_path + namelen + 1, temp->d_name.name, |
80 | temp->d_name.len); | |
81 | cFYI(0, (" name: %s ", full_path + namelen)); | |
82 | } | |
83 | temp = temp->d_parent; | |
84 | if(temp == NULL) { | |
85 | cERROR(1,("corrupt dentry")); | |
86 | kfree(full_path); | |
87 | return NULL; | |
88 | } | |
89 | } | |
90 | if (namelen != 0) { | |
91 | cERROR(1, | |
92 | ("We did not end path lookup where we expected namelen is %d", | |
93 | namelen)); | |
94 | /* presumably this is only possible if we were racing with a rename | |
95 | of one of the parent directories (we can not lock the dentries | |
96 | above us to prevent this, but retrying should be harmless) */ | |
97 | kfree(full_path); | |
98 | namelen = 0; | |
99 | goto cifs_bp_rename_retry; | |
100 | } | |
101 | ||
102 | return full_path; | |
103 | } | |
104 | ||
737b758c | 105 | /* char * build_wildcard_path_from_dentry(struct dentry *direntry) |
1da177e4 | 106 | { |
1da177e4 LT |
107 | if(full_path == NULL) |
108 | return full_path; | |
109 | ||
110 | full_path[namelen] = '\\'; | |
111 | full_path[namelen+1] = '*'; | |
737b758c SF |
112 | full_path[namelen+2] = 0; |
113 | BB remove above eight lines BB */ | |
1da177e4 LT |
114 | |
115 | /* Inode operations in similar order to how they appear in the Linux file fs.h */ | |
116 | ||
117 | int | |
118 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
119 | struct nameidata *nd) | |
120 | { | |
121 | int rc = -ENOENT; | |
122 | int xid; | |
123 | int oplock = 0; | |
124 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; | |
125 | __u16 fileHandle; | |
126 | struct cifs_sb_info *cifs_sb; | |
127 | struct cifsTconInfo *pTcon; | |
128 | char *full_path = NULL; | |
129 | FILE_ALL_INFO * buf = NULL; | |
130 | struct inode *newinode = NULL; | |
131 | struct cifsFileInfo * pCifsFile = NULL; | |
132 | struct cifsInodeInfo * pCifsInode; | |
133 | int disposition = FILE_OVERWRITE_IF; | |
134 | int write_only = FALSE; | |
135 | ||
136 | xid = GetXid(); | |
137 | ||
138 | cifs_sb = CIFS_SB(inode->i_sb); | |
139 | pTcon = cifs_sb->tcon; | |
140 | ||
141 | down(&direntry->d_sb->s_vfs_rename_sem); | |
142 | full_path = build_path_from_dentry(direntry); | |
143 | up(&direntry->d_sb->s_vfs_rename_sem); | |
144 | if(full_path == NULL) { | |
145 | FreeXid(xid); | |
146 | return -ENOMEM; | |
147 | } | |
148 | ||
e08fc045 MS |
149 | if(nd && (nd->flags & LOOKUP_OPEN)) { |
150 | int oflags = nd->intent.open.flags; | |
151 | ||
152 | desiredAccess = 0; | |
153 | if (oflags & FMODE_READ) | |
154 | desiredAccess |= GENERIC_READ; | |
155 | if (oflags & FMODE_WRITE) { | |
156 | desiredAccess |= GENERIC_WRITE; | |
157 | if (!(oflags & FMODE_READ)) | |
158 | write_only = TRUE; | |
1da177e4 LT |
159 | } |
160 | ||
e08fc045 | 161 | if((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 162 | disposition = FILE_CREATE; |
e08fc045 | 163 | else if((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 164 | disposition = FILE_OVERWRITE_IF; |
e08fc045 | 165 | else if((oflags & O_CREAT) == O_CREAT) |
1da177e4 LT |
166 | disposition = FILE_OPEN_IF; |
167 | else { | |
168 | cFYI(1,("Create flag not set in create function")); | |
169 | } | |
170 | } | |
171 | ||
172 | /* BB add processing to set equivalent of mode - e.g. via CreateX with ACLs */ | |
173 | if (oplockEnabled) | |
174 | oplock = REQ_OPLOCK; | |
175 | ||
176 | buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL); | |
177 | if(buf == NULL) { | |
178 | kfree(full_path); | |
179 | FreeXid(xid); | |
180 | return -ENOMEM; | |
181 | } | |
182 | ||
183 | rc = CIFSSMBOpen(xid, pTcon, full_path, disposition, | |
184 | desiredAccess, CREATE_NOT_DIR, | |
737b758c SF |
185 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
186 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
a9d02ad4 SF |
187 | if(rc == -EIO) { |
188 | /* old server, retry the open legacy style */ | |
189 | rc = SMBLegacyOpen(xid, pTcon, full_path, disposition, | |
190 | desiredAccess, CREATE_NOT_DIR, | |
191 | &fileHandle, &oplock, buf, cifs_sb->local_nls, | |
192 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
193 | } | |
1da177e4 LT |
194 | if (rc) { |
195 | cFYI(1, ("cifs_create returned 0x%x ", rc)); | |
196 | } else { | |
197 | /* If Open reported that we actually created a file | |
198 | then we now have to set the mode if possible */ | |
199 | if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX) && | |
200 | (oplock & CIFS_CREATE_ACTION)) | |
201 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
202 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, | |
203 | (__u64)current->euid, | |
204 | (__u64)current->egid, | |
205 | 0 /* dev */, | |
737b758c SF |
206 | cifs_sb->local_nls, |
207 | cifs_sb->mnt_cifs_flags & | |
208 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
209 | } else { |
210 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, | |
211 | (__u64)-1, | |
212 | (__u64)-1, | |
213 | 0 /* dev */, | |
737b758c SF |
214 | cifs_sb->local_nls, |
215 | cifs_sb->mnt_cifs_flags & | |
216 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
217 | } |
218 | else { | |
d7245c2c | 219 | /* BB implement mode setting via Windows security descriptors */ |
1da177e4 LT |
220 | /* eg CIFSSMBWinSetPerms(xid,pTcon,full_path,mode,-1,-1,local_nls);*/ |
221 | /* could set r/o dos attribute if mode & 0222 == 0 */ | |
222 | } | |
223 | ||
224 | /* BB server might mask mode so we have to query for Unix case*/ | |
225 | if (pTcon->ses->capabilities & CAP_UNIX) | |
226 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
227 | inode->i_sb,xid); | |
228 | else { | |
229 | rc = cifs_get_inode_info(&newinode, full_path, | |
230 | buf, inode->i_sb,xid); | |
231 | if(newinode) | |
232 | newinode->i_mode = mode; | |
233 | } | |
234 | ||
235 | if (rc != 0) { | |
4a6d87f1 SF |
236 | cFYI(1, |
237 | ("Create worked but get_inode_info failed rc = %d", | |
1da177e4 LT |
238 | rc)); |
239 | } else { | |
b92327fe SF |
240 | if (pTcon->nocase) |
241 | direntry->d_op = &cifs_ci_dentry_ops; | |
242 | else | |
243 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
244 | d_instantiate(direntry, newinode); |
245 | } | |
246 | if((nd->flags & LOOKUP_OPEN) == FALSE) { | |
247 | /* mknod case - do not leave file open */ | |
248 | CIFSSMBClose(xid, pTcon, fileHandle); | |
249 | } else if(newinode) { | |
d14537f1 | 250 | pCifsFile = |
1da177e4 | 251 | kmalloc(sizeof (struct cifsFileInfo), GFP_KERNEL); |
d14537f1 SF |
252 | |
253 | if(pCifsFile == NULL) | |
254 | goto cifs_create_out; | |
255 | memset((char *)pCifsFile, 0, | |
256 | sizeof (struct cifsFileInfo)); | |
257 | pCifsFile->netfid = fileHandle; | |
258 | pCifsFile->pid = current->tgid; | |
259 | pCifsFile->pInode = newinode; | |
260 | pCifsFile->invalidHandle = FALSE; | |
261 | pCifsFile->closePend = FALSE; | |
262 | init_MUTEX(&pCifsFile->fh_sem); | |
263 | /* set the following in open now | |
264 | pCifsFile->pfile = file; */ | |
265 | write_lock(&GlobalSMBSeslock); | |
266 | list_add(&pCifsFile->tlist,&pTcon->openFileList); | |
267 | pCifsInode = CIFS_I(newinode); | |
268 | if(pCifsInode) { | |
1da177e4 | 269 | /* if readable file instance put first in list*/ |
d14537f1 SF |
270 | if (write_only == TRUE) { |
271 | list_add_tail(&pCifsFile->flist, | |
272 | &pCifsInode->openFileList); | |
273 | } else { | |
274 | list_add(&pCifsFile->flist, | |
275 | &pCifsInode->openFileList); | |
1da177e4 | 276 | } |
d14537f1 SF |
277 | if((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
278 | pCifsInode->clientCanCacheAll = TRUE; | |
279 | pCifsInode->clientCanCacheRead = TRUE; | |
280 | cFYI(1,("Exclusive Oplock for inode %p", | |
281 | newinode)); | |
282 | } else if((oplock & 0xF) == OPLOCK_READ) | |
283 | pCifsInode->clientCanCacheRead = TRUE; | |
1da177e4 | 284 | } |
d14537f1 | 285 | write_unlock(&GlobalSMBSeslock); |
1da177e4 LT |
286 | } |
287 | } | |
d14537f1 SF |
288 | cifs_create_out: |
289 | kfree(buf); | |
290 | kfree(full_path); | |
1da177e4 | 291 | FreeXid(xid); |
1da177e4 LT |
292 | return rc; |
293 | } | |
294 | ||
86c96b4b SF |
295 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
296 | dev_t device_number) | |
1da177e4 LT |
297 | { |
298 | int rc = -EPERM; | |
299 | int xid; | |
300 | struct cifs_sb_info *cifs_sb; | |
301 | struct cifsTconInfo *pTcon; | |
302 | char *full_path = NULL; | |
303 | struct inode * newinode = NULL; | |
304 | ||
305 | if (!old_valid_dev(device_number)) | |
306 | return -EINVAL; | |
307 | ||
308 | xid = GetXid(); | |
309 | ||
310 | cifs_sb = CIFS_SB(inode->i_sb); | |
311 | pTcon = cifs_sb->tcon; | |
312 | ||
313 | down(&direntry->d_sb->s_vfs_rename_sem); | |
314 | full_path = build_path_from_dentry(direntry); | |
315 | up(&direntry->d_sb->s_vfs_rename_sem); | |
316 | if(full_path == NULL) | |
317 | rc = -ENOMEM; | |
4a6d87f1 | 318 | else if (pTcon->ses->capabilities & CAP_UNIX) { |
1da177e4 LT |
319 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
320 | rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, | |
321 | mode,(__u64)current->euid,(__u64)current->egid, | |
737b758c SF |
322 | device_number, cifs_sb->local_nls, |
323 | cifs_sb->mnt_cifs_flags & | |
324 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
325 | } else { |
326 | rc = CIFSSMBUnixSetPerms(xid, pTcon, | |
327 | full_path, mode, (__u64)-1, (__u64)-1, | |
737b758c SF |
328 | device_number, cifs_sb->local_nls, |
329 | cifs_sb->mnt_cifs_flags & | |
330 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
331 | } |
332 | ||
333 | if(!rc) { | |
334 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
335 | inode->i_sb,xid); | |
b92327fe SF |
336 | if (pTcon->nocase) |
337 | direntry->d_op = &cifs_ci_dentry_ops; | |
338 | else | |
339 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
340 | if(rc == 0) |
341 | d_instantiate(direntry, newinode); | |
342 | } | |
d7245c2c | 343 | } else { |
eda3c029 SF |
344 | if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
345 | int oplock = 0; | |
346 | u16 fileHandle; | |
347 | FILE_ALL_INFO * buf; | |
d7245c2c SF |
348 | |
349 | cFYI(1,("sfu compat create special file")); | |
d7245c2c | 350 | |
eda3c029 SF |
351 | buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL); |
352 | if(buf == NULL) { | |
353 | kfree(full_path); | |
354 | FreeXid(xid); | |
355 | return -ENOMEM; | |
356 | } | |
357 | ||
358 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
359 | FILE_CREATE, /* fail if exists */ | |
360 | GENERIC_WRITE /* BB would | |
361 | WRITE_OWNER | WRITE_DAC be better? */, | |
362 | /* Create a file and set the | |
363 | file attribute to SYSTEM */ | |
364 | CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
365 | &fileHandle, &oplock, buf, | |
366 | cifs_sb->local_nls, | |
367 | cifs_sb->mnt_cifs_flags & | |
368 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
369 | ||
370 | if(!rc) { | |
371 | /* BB Do not bother to decode buf since no | |
86c96b4b SF |
372 | local inode yet to put timestamps in, |
373 | but we can reuse it safely */ | |
374 | int bytes_written; | |
375 | struct win_dev *pdev; | |
376 | pdev = (struct win_dev *)buf; | |
377 | if(S_ISCHR(mode)) { | |
378 | memcpy(pdev->type, "IntxCHR", 8); | |
379 | pdev->major = | |
380 | cpu_to_le64(MAJOR(device_number)); | |
381 | pdev->minor = | |
382 | cpu_to_le64(MINOR(device_number)); | |
383 | rc = CIFSSMBWrite(xid, pTcon, | |
384 | fileHandle, | |
385 | sizeof(struct win_dev), | |
386 | 0, &bytes_written, (char *)pdev, | |
387 | NULL, 0); | |
388 | } else if(S_ISBLK(mode)) { | |
389 | memcpy(pdev->type, "IntxBLK", 8); | |
390 | pdev->major = | |
391 | cpu_to_le64(MAJOR(device_number)); | |
392 | pdev->minor = | |
393 | cpu_to_le64(MINOR(device_number)); | |
394 | rc = CIFSSMBWrite(xid, pTcon, | |
395 | fileHandle, | |
396 | sizeof(struct win_dev), | |
397 | 0, &bytes_written, (char *)pdev, | |
398 | NULL, 0); | |
399 | } /* else if(S_ISFIFO */ | |
eda3c029 SF |
400 | CIFSSMBClose(xid, pTcon, fileHandle); |
401 | d_drop(direntry); | |
402 | } | |
403 | kfree(buf); | |
d7245c2c SF |
404 | /* add code here to set EAs */ |
405 | } | |
1da177e4 LT |
406 | } |
407 | ||
d14537f1 | 408 | kfree(full_path); |
1da177e4 | 409 | FreeXid(xid); |
1da177e4 LT |
410 | return rc; |
411 | } | |
412 | ||
413 | ||
414 | struct dentry * | |
415 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, struct nameidata *nd) | |
416 | { | |
417 | int xid; | |
418 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
419 | struct cifs_sb_info *cifs_sb; | |
420 | struct cifsTconInfo *pTcon; | |
421 | struct inode *newInode = NULL; | |
422 | char *full_path = NULL; | |
423 | ||
424 | xid = GetXid(); | |
425 | ||
426 | cFYI(1, | |
427 | (" parent inode = 0x%p name is: %s and dentry = 0x%p", | |
428 | parent_dir_inode, direntry->d_name.name, direntry)); | |
429 | ||
430 | /* BB Add check of incoming data - e.g. frame not longer than maximum SMB - let server check the namelen BB */ | |
431 | ||
432 | /* check whether path exists */ | |
433 | ||
434 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
435 | pTcon = cifs_sb->tcon; | |
436 | ||
437 | /* can not grab the rename sem here since it would | |
438 | deadlock in the cases (beginning of sys_rename itself) | |
439 | in which we already have the sb rename sem */ | |
440 | full_path = build_path_from_dentry(direntry); | |
441 | if(full_path == NULL) { | |
442 | FreeXid(xid); | |
443 | return ERR_PTR(-ENOMEM); | |
444 | } | |
445 | ||
446 | if (direntry->d_inode != NULL) { | |
447 | cFYI(1, (" non-NULL inode in lookup")); | |
448 | } else { | |
449 | cFYI(1, (" NULL inode in lookup")); | |
450 | } | |
451 | cFYI(1, | |
452 | (" Full path: %s inode = 0x%p", full_path, direntry->d_inode)); | |
453 | ||
454 | if (pTcon->ses->capabilities & CAP_UNIX) | |
455 | rc = cifs_get_inode_info_unix(&newInode, full_path, | |
456 | parent_dir_inode->i_sb,xid); | |
457 | else | |
458 | rc = cifs_get_inode_info(&newInode, full_path, NULL, | |
459 | parent_dir_inode->i_sb,xid); | |
460 | ||
461 | if ((rc == 0) && (newInode != NULL)) { | |
b92327fe SF |
462 | if (pTcon->nocase) |
463 | direntry->d_op = &cifs_ci_dentry_ops; | |
464 | else | |
465 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
466 | d_add(direntry, newInode); |
467 | ||
468 | /* since paths are not looked up by component - the parent directories are presumed to be good here */ | |
469 | renew_parental_timestamps(direntry); | |
470 | ||
471 | } else if (rc == -ENOENT) { | |
472 | rc = 0; | |
473 | d_add(direntry, NULL); | |
474 | } else { | |
b2aeb9d5 SF |
475 | cERROR(1,("Error 0x%x on cifs_get_inode_info in lookup of %s", |
476 | rc,full_path)); | |
1da177e4 LT |
477 | /* BB special case check for Access Denied - watch security |
478 | exposure of returning dir info implicitly via different rc | |
479 | if file exists or not but no access BB */ | |
480 | } | |
481 | ||
d14537f1 | 482 | kfree(full_path); |
1da177e4 LT |
483 | FreeXid(xid); |
484 | return ERR_PTR(rc); | |
485 | } | |
486 | ||
1da177e4 LT |
487 | static int |
488 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
489 | { | |
490 | int isValid = 1; | |
491 | ||
492 | /* lock_kernel(); *//* surely we do not want to lock the kernel for a whole network round trip which could take seconds */ | |
493 | ||
494 | if (direntry->d_inode) { | |
495 | if (cifs_revalidate(direntry)) { | |
496 | /* unlock_kernel(); */ | |
497 | return 0; | |
498 | } | |
499 | } else { | |
500 | cFYI(1, | |
501 | ("In cifs_d_revalidate with no inode but name = %s and dentry 0x%p", | |
502 | direntry->d_name.name, direntry)); | |
503 | } | |
504 | ||
505 | /* unlock_kernel(); */ | |
506 | ||
507 | return isValid; | |
508 | } | |
509 | ||
510 | /* static int cifs_d_delete(struct dentry *direntry) | |
511 | { | |
512 | int rc = 0; | |
513 | ||
514 | cFYI(1, ("In cifs d_delete, name = %s", direntry->d_name.name)); | |
515 | ||
516 | return rc; | |
517 | } */ | |
518 | ||
519 | struct dentry_operations cifs_dentry_ops = { | |
520 | .d_revalidate = cifs_d_revalidate, | |
521 | /* d_delete: cifs_d_delete, *//* not needed except for debugging */ | |
522 | /* no need for d_hash, d_compare, d_release, d_iput ... yet. BB confirm this BB */ | |
523 | }; | |
b92327fe SF |
524 | |
525 | static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) | |
526 | { | |
527 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
528 | unsigned long hash; | |
529 | int i; | |
530 | ||
531 | hash = init_name_hash(); | |
532 | for (i = 0; i < q->len; i++) | |
533 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
534 | hash); | |
535 | q->hash = end_name_hash(hash); | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
540 | static int cifs_ci_compare(struct dentry *dentry, struct qstr *a, | |
541 | struct qstr *b) | |
542 | { | |
543 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
544 | ||
545 | if ((a->len == b->len) && | |
546 | (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) { | |
547 | /* | |
548 | * To preserve case, don't let an existing negative dentry's | |
549 | * case take precedence. If a is not a negative dentry, this | |
550 | * should have no side effects | |
551 | */ | |
552 | memcpy((unsigned char *)a->name, b->name, a->len); | |
553 | return 0; | |
554 | } | |
555 | return 1; | |
556 | } | |
557 | ||
558 | struct dentry_operations cifs_ci_dentry_ops = { | |
559 | .d_revalidate = cifs_d_revalidate, | |
560 | .d_hash = cifs_ci_hash, | |
561 | .d_compare = cifs_ci_compare, | |
562 | }; |