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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 | |
5fdae1f6 | 5 | * |
ad7a2926 | 6 | * Copyright (C) International Business Machines Corp., 2002,2008 |
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 | ||
99ee4dbd | 34 | static void |
1da177e4 LT |
35 | renew_parental_timestamps(struct dentry *direntry) |
36 | { | |
5fdae1f6 SF |
37 | /* BB check if there is a way to get the kernel to do this or if we |
38 | really need this */ | |
1da177e4 LT |
39 | do { |
40 | direntry->d_time = jiffies; | |
41 | direntry = direntry->d_parent; | |
5fdae1f6 | 42 | } while (!IS_ROOT(direntry)); |
1da177e4 LT |
43 | } |
44 | ||
45 | /* Note: caller must free return buffer */ | |
46 | char * | |
47 | build_path_from_dentry(struct dentry *direntry) | |
48 | { | |
49 | struct dentry *temp; | |
2fe87f02 SF |
50 | int namelen; |
51 | int pplen; | |
1da177e4 | 52 | char *full_path; |
88274815 | 53 | char dirsep; |
1da177e4 | 54 | |
5fdae1f6 | 55 | if (direntry == NULL) |
1da177e4 LT |
56 | return NULL; /* not much we can do if dentry is freed and |
57 | we need to reopen the file after it was closed implicitly | |
58 | when the server crashed */ | |
59 | ||
88274815 | 60 | dirsep = CIFS_DIR_SEP(CIFS_SB(direntry->d_sb)); |
2fe87f02 | 61 | pplen = CIFS_SB(direntry->d_sb)->prepathlen; |
1da177e4 | 62 | cifs_bp_rename_retry: |
5fdae1f6 | 63 | namelen = pplen; |
1da177e4 LT |
64 | for (temp = direntry; !IS_ROOT(temp);) { |
65 | namelen += (1 + temp->d_name.len); | |
66 | temp = temp->d_parent; | |
5fdae1f6 SF |
67 | if (temp == NULL) { |
68 | cERROR(1, ("corrupt dentry")); | |
1da177e4 LT |
69 | return NULL; |
70 | } | |
71 | } | |
72 | ||
73 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 74 | if (full_path == NULL) |
1da177e4 LT |
75 | return full_path; |
76 | full_path[namelen] = 0; /* trailing null */ | |
1da177e4 LT |
77 | for (temp = direntry; !IS_ROOT(temp);) { |
78 | namelen -= 1 + temp->d_name.len; | |
79 | if (namelen < 0) { | |
80 | break; | |
81 | } else { | |
7f57356b | 82 | full_path[namelen] = dirsep; |
1da177e4 LT |
83 | strncpy(full_path + namelen + 1, temp->d_name.name, |
84 | temp->d_name.len); | |
2fe87f02 | 85 | cFYI(0, ("name: %s", full_path + namelen)); |
1da177e4 LT |
86 | } |
87 | temp = temp->d_parent; | |
5fdae1f6 SF |
88 | if (temp == NULL) { |
89 | cERROR(1, ("corrupt dentry")); | |
1da177e4 LT |
90 | kfree(full_path); |
91 | return NULL; | |
92 | } | |
93 | } | |
2fe87f02 | 94 | if (namelen != pplen) { |
1da177e4 | 95 | cERROR(1, |
2fe87f02 | 96 | ("did not end path lookup where expected namelen is %d", |
1da177e4 | 97 | namelen)); |
5fdae1f6 | 98 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
99 | of one of the parent directories (we can not lock the dentries |
100 | above us to prevent this, but retrying should be harmless) */ | |
101 | kfree(full_path); | |
1da177e4 LT |
102 | goto cifs_bp_rename_retry; |
103 | } | |
2fe87f02 SF |
104 | /* DIR_SEP already set for byte 0 / vs \ but not for |
105 | subsequent slashes in prepath which currently must | |
106 | be entered the right way - not sure if there is an alternative | |
107 | since the '\' is a valid posix character so we can not switch | |
108 | those safely to '/' if any are found in the middle of the prepath */ | |
109 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
5fdae1f6 | 110 | strncpy(full_path, CIFS_SB(direntry->d_sb)->prepath, pplen); |
1da177e4 LT |
111 | return full_path; |
112 | } | |
113 | ||
3979877e | 114 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 LT |
115 | |
116 | int | |
117 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
118 | struct nameidata *nd) | |
119 | { | |
120 | int rc = -ENOENT; | |
121 | int xid; | |
122 | int oplock = 0; | |
123 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; | |
124 | __u16 fileHandle; | |
125 | struct cifs_sb_info *cifs_sb; | |
126 | struct cifsTconInfo *pTcon; | |
127 | char *full_path = NULL; | |
fb8c4b14 | 128 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 129 | struct inode *newinode = NULL; |
fb8c4b14 SF |
130 | struct cifsFileInfo *pCifsFile = NULL; |
131 | struct cifsInodeInfo *pCifsInode; | |
1da177e4 | 132 | int disposition = FILE_OVERWRITE_IF; |
4b18f2a9 | 133 | bool write_only = false; |
1da177e4 LT |
134 | |
135 | xid = GetXid(); | |
136 | ||
137 | cifs_sb = CIFS_SB(inode->i_sb); | |
138 | pTcon = cifs_sb->tcon; | |
139 | ||
1da177e4 | 140 | full_path = build_path_from_dentry(direntry); |
5fdae1f6 | 141 | if (full_path == NULL) { |
1da177e4 LT |
142 | FreeXid(xid); |
143 | return -ENOMEM; | |
144 | } | |
145 | ||
5fdae1f6 | 146 | if (nd && (nd->flags & LOOKUP_OPEN)) { |
e08fc045 MS |
147 | int oflags = nd->intent.open.flags; |
148 | ||
149 | desiredAccess = 0; | |
150 | if (oflags & FMODE_READ) | |
151 | desiredAccess |= GENERIC_READ; | |
152 | if (oflags & FMODE_WRITE) { | |
153 | desiredAccess |= GENERIC_WRITE; | |
154 | if (!(oflags & FMODE_READ)) | |
4b18f2a9 | 155 | write_only = true; |
1da177e4 LT |
156 | } |
157 | ||
5fdae1f6 | 158 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 159 | disposition = FILE_CREATE; |
5fdae1f6 | 160 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 161 | disposition = FILE_OVERWRITE_IF; |
5fdae1f6 | 162 | else if ((oflags & O_CREAT) == O_CREAT) |
1da177e4 | 163 | disposition = FILE_OPEN_IF; |
ad7a2926 | 164 | else |
5fdae1f6 | 165 | cFYI(1, ("Create flag not set in create function")); |
1da177e4 LT |
166 | } |
167 | ||
5fdae1f6 SF |
168 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
169 | ACLs */ | |
1da177e4 LT |
170 | if (oplockEnabled) |
171 | oplock = REQ_OPLOCK; | |
172 | ||
5fdae1f6 SF |
173 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
174 | if (buf == NULL) { | |
1da177e4 LT |
175 | kfree(full_path); |
176 | FreeXid(xid); | |
177 | return -ENOMEM; | |
178 | } | |
5fdae1f6 | 179 | if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS) |
5bafd765 | 180 | rc = CIFSSMBOpen(xid, pTcon, full_path, disposition, |
1da177e4 | 181 | desiredAccess, CREATE_NOT_DIR, |
737b758c SF |
182 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
183 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5bafd765 SF |
184 | else |
185 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
186 | ||
5fdae1f6 | 187 | if (rc == -EIO) { |
a9d02ad4 SF |
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); | |
5fdae1f6 | 193 | } |
1da177e4 | 194 | if (rc) { |
26a21b98 | 195 | cFYI(1, ("cifs_create returned 0x%x", rc)); |
1da177e4 LT |
196 | } else { |
197 | /* If Open reported that we actually created a file | |
198 | then we now have to set the mode if possible */ | |
c18c842b | 199 | if ((pTcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { |
3ce53fc4 | 200 | mode &= ~current->fs->umask; |
5fdae1f6 | 201 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
1da177e4 | 202 | CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, |
83451879 SF |
203 | (__u64)current->fsuid, |
204 | (__u64)current->fsgid, | |
1da177e4 | 205 | 0 /* dev */, |
5fdae1f6 SF |
206 | cifs_sb->local_nls, |
207 | cifs_sb->mnt_cifs_flags & | |
737b758c | 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 | 214 | cifs_sb->local_nls, |
5fdae1f6 | 215 | cifs_sb->mnt_cifs_flags & |
737b758c | 216 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 217 | } |
3ce53fc4 | 218 | } else { |
5fdae1f6 SF |
219 | /* BB implement mode setting via Windows security |
220 | descriptors e.g. */ | |
221 | /* CIFSSMBWinSetPerms(xid,pTcon,path,mode,-1,-1,nls);*/ | |
222 | ||
223 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
1da177e4 LT |
224 | } |
225 | ||
c18c842b SF |
226 | /* server might mask mode so we have to query for it */ |
227 | if (pTcon->unix_ext) | |
1da177e4 | 228 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 229 | inode->i_sb, xid); |
1da177e4 LT |
230 | else { |
231 | rc = cifs_get_inode_info(&newinode, full_path, | |
8b1327f6 SF |
232 | buf, inode->i_sb, xid, |
233 | &fileHandle); | |
5fdae1f6 | 234 | if (newinode) { |
1da177e4 | 235 | newinode->i_mode = mode; |
5fdae1f6 SF |
236 | if ((oplock & CIFS_CREATE_ACTION) && |
237 | (cifs_sb->mnt_cifs_flags & | |
6473a559 SF |
238 | CIFS_MOUNT_SET_UID)) { |
239 | newinode->i_uid = current->fsuid; | |
240 | newinode->i_gid = current->fsgid; | |
241 | } | |
242 | } | |
1da177e4 LT |
243 | } |
244 | ||
245 | if (rc != 0) { | |
4a6d87f1 SF |
246 | cFYI(1, |
247 | ("Create worked but get_inode_info failed rc = %d", | |
1da177e4 LT |
248 | rc)); |
249 | } else { | |
b92327fe SF |
250 | if (pTcon->nocase) |
251 | direntry->d_op = &cifs_ci_dentry_ops; | |
252 | else | |
253 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
254 | d_instantiate(direntry, newinode); |
255 | } | |
7521a3c5 | 256 | if ((nd == NULL /* nfsd case - nfs srv does not set nd */) || |
4b18f2a9 | 257 | (!(nd->flags & LOOKUP_OPEN))) { |
1da177e4 LT |
258 | /* mknod case - do not leave file open */ |
259 | CIFSSMBClose(xid, pTcon, fileHandle); | |
5fdae1f6 | 260 | } else if (newinode) { |
d14537f1 | 261 | pCifsFile = |
92ad9b93 | 262 | kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); |
221601c3 | 263 | |
5fdae1f6 | 264 | if (pCifsFile == NULL) |
d14537f1 | 265 | goto cifs_create_out; |
d14537f1 SF |
266 | pCifsFile->netfid = fileHandle; |
267 | pCifsFile->pid = current->tgid; | |
268 | pCifsFile->pInode = newinode; | |
4b18f2a9 SF |
269 | pCifsFile->invalidHandle = false; |
270 | pCifsFile->closePend = false; | |
d14537f1 | 271 | init_MUTEX(&pCifsFile->fh_sem); |
796e5661 | 272 | mutex_init(&pCifsFile->lock_mutex); |
e466e487 | 273 | INIT_LIST_HEAD(&pCifsFile->llist); |
5fdae1f6 | 274 | atomic_set(&pCifsFile->wrtPending, 0); |
e466e487 | 275 | |
5fdae1f6 | 276 | /* set the following in open now |
d14537f1 SF |
277 | pCifsFile->pfile = file; */ |
278 | write_lock(&GlobalSMBSeslock); | |
5fdae1f6 | 279 | list_add(&pCifsFile->tlist, &pTcon->openFileList); |
d14537f1 | 280 | pCifsInode = CIFS_I(newinode); |
5fdae1f6 | 281 | if (pCifsInode) { |
1da177e4 | 282 | /* if readable file instance put first in list*/ |
4b18f2a9 | 283 | if (write_only) { |
5fdae1f6 | 284 | list_add_tail(&pCifsFile->flist, |
d14537f1 SF |
285 | &pCifsInode->openFileList); |
286 | } else { | |
287 | list_add(&pCifsFile->flist, | |
288 | &pCifsInode->openFileList); | |
1da177e4 | 289 | } |
5fdae1f6 | 290 | if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
4b18f2a9 SF |
291 | pCifsInode->clientCanCacheAll = true; |
292 | pCifsInode->clientCanCacheRead = true; | |
221601c3 | 293 | cFYI(1, ("Exclusive Oplock inode %p", |
d14537f1 | 294 | newinode)); |
5fdae1f6 | 295 | } else if ((oplock & 0xF) == OPLOCK_READ) |
4b18f2a9 | 296 | pCifsInode->clientCanCacheRead = true; |
1da177e4 | 297 | } |
d14537f1 | 298 | write_unlock(&GlobalSMBSeslock); |
1da177e4 | 299 | } |
5fdae1f6 | 300 | } |
d14537f1 SF |
301 | cifs_create_out: |
302 | kfree(buf); | |
303 | kfree(full_path); | |
1da177e4 | 304 | FreeXid(xid); |
1da177e4 LT |
305 | return rc; |
306 | } | |
307 | ||
5fdae1f6 SF |
308 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
309 | dev_t device_number) | |
1da177e4 LT |
310 | { |
311 | int rc = -EPERM; | |
312 | int xid; | |
313 | struct cifs_sb_info *cifs_sb; | |
314 | struct cifsTconInfo *pTcon; | |
315 | char *full_path = NULL; | |
fb8c4b14 | 316 | struct inode *newinode = NULL; |
1da177e4 LT |
317 | |
318 | if (!old_valid_dev(device_number)) | |
319 | return -EINVAL; | |
320 | ||
321 | xid = GetXid(); | |
322 | ||
323 | cifs_sb = CIFS_SB(inode->i_sb); | |
324 | pTcon = cifs_sb->tcon; | |
325 | ||
1da177e4 | 326 | full_path = build_path_from_dentry(direntry); |
5fdae1f6 | 327 | if (full_path == NULL) |
1da177e4 | 328 | rc = -ENOMEM; |
c18c842b | 329 | else if (pTcon->unix_ext) { |
3ce53fc4 | 330 | mode &= ~current->fs->umask; |
5fdae1f6 | 331 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
1da177e4 | 332 | rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, |
5fdae1f6 SF |
333 | mode, (__u64)current->fsuid, |
334 | (__u64)current->fsgid, | |
737b758c | 335 | device_number, cifs_sb->local_nls, |
5fdae1f6 | 336 | cifs_sb->mnt_cifs_flags & |
737b758c | 337 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 LT |
338 | } else { |
339 | rc = CIFSSMBUnixSetPerms(xid, pTcon, | |
340 | full_path, mode, (__u64)-1, (__u64)-1, | |
737b758c | 341 | device_number, cifs_sb->local_nls, |
5fdae1f6 | 342 | cifs_sb->mnt_cifs_flags & |
737b758c | 343 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 LT |
344 | } |
345 | ||
5fdae1f6 | 346 | if (!rc) { |
1da177e4 | 347 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 348 | inode->i_sb, xid); |
b92327fe SF |
349 | if (pTcon->nocase) |
350 | direntry->d_op = &cifs_ci_dentry_ops; | |
351 | else | |
352 | direntry->d_op = &cifs_dentry_ops; | |
5fdae1f6 | 353 | if (rc == 0) |
1da177e4 LT |
354 | d_instantiate(direntry, newinode); |
355 | } | |
d7245c2c | 356 | } else { |
5fdae1f6 | 357 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
eda3c029 SF |
358 | int oplock = 0; |
359 | u16 fileHandle; | |
ad7a2926 | 360 | FILE_ALL_INFO *buf; |
d7245c2c | 361 | |
5fdae1f6 | 362 | cFYI(1, ("sfu compat create special file")); |
d7245c2c | 363 | |
5fdae1f6 SF |
364 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
365 | if (buf == NULL) { | |
eda3c029 SF |
366 | kfree(full_path); |
367 | FreeXid(xid); | |
368 | return -ENOMEM; | |
369 | } | |
370 | ||
371 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
372 | FILE_CREATE, /* fail if exists */ | |
5fdae1f6 | 373 | GENERIC_WRITE /* BB would |
eda3c029 SF |
374 | WRITE_OWNER | WRITE_DAC be better? */, |
375 | /* Create a file and set the | |
376 | file attribute to SYSTEM */ | |
377 | CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
378 | &fileHandle, &oplock, buf, | |
379 | cifs_sb->local_nls, | |
5fdae1f6 | 380 | cifs_sb->mnt_cifs_flags & |
eda3c029 SF |
381 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
382 | ||
5bafd765 SF |
383 | /* BB FIXME - add handling for backlevel servers |
384 | which need legacy open and check for all | |
5fdae1f6 SF |
385 | calls to SMBOpen for fallback to SMBLeagcyOpen */ |
386 | if (!rc) { | |
eda3c029 | 387 | /* BB Do not bother to decode buf since no |
86c96b4b SF |
388 | local inode yet to put timestamps in, |
389 | but we can reuse it safely */ | |
77159b4d | 390 | unsigned int bytes_written; |
86c96b4b SF |
391 | struct win_dev *pdev; |
392 | pdev = (struct win_dev *)buf; | |
5fdae1f6 | 393 | if (S_ISCHR(mode)) { |
86c96b4b SF |
394 | memcpy(pdev->type, "IntxCHR", 8); |
395 | pdev->major = | |
396 | cpu_to_le64(MAJOR(device_number)); | |
5fdae1f6 | 397 | pdev->minor = |
86c96b4b SF |
398 | cpu_to_le64(MINOR(device_number)); |
399 | rc = CIFSSMBWrite(xid, pTcon, | |
400 | fileHandle, | |
401 | sizeof(struct win_dev), | |
402 | 0, &bytes_written, (char *)pdev, | |
403 | NULL, 0); | |
5fdae1f6 | 404 | } else if (S_ISBLK(mode)) { |
86c96b4b SF |
405 | memcpy(pdev->type, "IntxBLK", 8); |
406 | pdev->major = | |
407 | cpu_to_le64(MAJOR(device_number)); | |
408 | pdev->minor = | |
409 | cpu_to_le64(MINOR(device_number)); | |
410 | rc = CIFSSMBWrite(xid, pTcon, | |
411 | fileHandle, | |
412 | sizeof(struct win_dev), | |
413 | 0, &bytes_written, (char *)pdev, | |
414 | NULL, 0); | |
415 | } /* else if(S_ISFIFO */ | |
eda3c029 SF |
416 | CIFSSMBClose(xid, pTcon, fileHandle); |
417 | d_drop(direntry); | |
418 | } | |
419 | kfree(buf); | |
d7245c2c SF |
420 | /* add code here to set EAs */ |
421 | } | |
1da177e4 LT |
422 | } |
423 | ||
d14537f1 | 424 | kfree(full_path); |
1da177e4 | 425 | FreeXid(xid); |
1da177e4 LT |
426 | return rc; |
427 | } | |
428 | ||
429 | ||
430 | struct dentry * | |
5fdae1f6 SF |
431 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
432 | struct nameidata *nd) | |
1da177e4 LT |
433 | { |
434 | int xid; | |
435 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
436 | struct cifs_sb_info *cifs_sb; | |
437 | struct cifsTconInfo *pTcon; | |
438 | struct inode *newInode = NULL; | |
439 | char *full_path = NULL; | |
440 | ||
441 | xid = GetXid(); | |
442 | ||
92ad9b93 | 443 | cFYI(1, (" parent inode = 0x%p name is: %s and dentry = 0x%p", |
1da177e4 LT |
444 | parent_dir_inode, direntry->d_name.name, direntry)); |
445 | ||
1da177e4 LT |
446 | /* check whether path exists */ |
447 | ||
448 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
449 | pTcon = cifs_sb->tcon; | |
450 | ||
296034f7 SF |
451 | /* |
452 | * Don't allow the separator character in a path component. | |
453 | * The VFS will not allow "/", but "\" is allowed by posix. | |
454 | */ | |
455 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
456 | int i; | |
457 | for (i = 0; i < direntry->d_name.len; i++) | |
458 | if (direntry->d_name.name[i] == '\\') { | |
459 | cFYI(1, ("Invalid file name")); | |
460 | FreeXid(xid); | |
461 | return ERR_PTR(-EINVAL); | |
462 | } | |
463 | } | |
464 | ||
1da177e4 LT |
465 | /* can not grab the rename sem here since it would |
466 | deadlock in the cases (beginning of sys_rename itself) | |
467 | in which we already have the sb rename sem */ | |
468 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 469 | if (full_path == NULL) { |
1da177e4 LT |
470 | FreeXid(xid); |
471 | return ERR_PTR(-ENOMEM); | |
472 | } | |
473 | ||
474 | if (direntry->d_inode != NULL) { | |
475 | cFYI(1, (" non-NULL inode in lookup")); | |
476 | } else { | |
477 | cFYI(1, (" NULL inode in lookup")); | |
478 | } | |
479 | cFYI(1, | |
480 | (" Full path: %s inode = 0x%p", full_path, direntry->d_inode)); | |
481 | ||
c18c842b | 482 | if (pTcon->unix_ext) |
1da177e4 | 483 | rc = cifs_get_inode_info_unix(&newInode, full_path, |
5fdae1f6 | 484 | parent_dir_inode->i_sb, xid); |
1da177e4 LT |
485 | else |
486 | rc = cifs_get_inode_info(&newInode, full_path, NULL, | |
8b1327f6 | 487 | parent_dir_inode->i_sb, xid, NULL); |
1da177e4 LT |
488 | |
489 | if ((rc == 0) && (newInode != NULL)) { | |
b92327fe SF |
490 | if (pTcon->nocase) |
491 | direntry->d_op = &cifs_ci_dentry_ops; | |
492 | else | |
493 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
494 | d_add(direntry, newInode); |
495 | ||
5fdae1f6 | 496 | /* since paths are not looked up by component - the parent |
3abb9272 | 497 | directories are presumed to be good here */ |
1da177e4 LT |
498 | renew_parental_timestamps(direntry); |
499 | ||
500 | } else if (rc == -ENOENT) { | |
501 | rc = 0; | |
3abb9272 SF |
502 | direntry->d_time = jiffies; |
503 | if (pTcon->nocase) | |
504 | direntry->d_op = &cifs_ci_dentry_ops; | |
505 | else | |
506 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 507 | d_add(direntry, NULL); |
5fdae1f6 SF |
508 | /* if it was once a directory (but how can we tell?) we could do |
509 | shrink_dcache_parent(direntry); */ | |
ed2b9170 SF |
510 | } else if (rc != -EACCES) { |
511 | cERROR(1, ("Unexpected lookup error %d", rc)); | |
512 | /* We special case check for Access Denied - since that | |
513 | is a common return code */ | |
1da177e4 LT |
514 | } |
515 | ||
d14537f1 | 516 | kfree(full_path); |
1da177e4 LT |
517 | FreeXid(xid); |
518 | return ERR_PTR(rc); | |
519 | } | |
520 | ||
1da177e4 LT |
521 | static int |
522 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
523 | { | |
524 | int isValid = 1; | |
525 | ||
1da177e4 | 526 | if (direntry->d_inode) { |
ad7a2926 | 527 | if (cifs_revalidate(direntry)) |
1da177e4 | 528 | return 0; |
1da177e4 | 529 | } else { |
3abb9272 SF |
530 | cFYI(1, ("neg dentry 0x%p name = %s", |
531 | direntry, direntry->d_name.name)); | |
5fdae1f6 | 532 | if (time_after(jiffies, direntry->d_time + HZ) || |
3abb9272 SF |
533 | !lookupCacheEnabled) { |
534 | d_drop(direntry); | |
535 | isValid = 0; | |
5fdae1f6 | 536 | } |
1da177e4 LT |
537 | } |
538 | ||
1da177e4 LT |
539 | return isValid; |
540 | } | |
541 | ||
542 | /* static int cifs_d_delete(struct dentry *direntry) | |
543 | { | |
544 | int rc = 0; | |
545 | ||
546 | cFYI(1, ("In cifs d_delete, name = %s", direntry->d_name.name)); | |
547 | ||
548 | return rc; | |
549 | } */ | |
550 | ||
551 | struct dentry_operations cifs_dentry_ops = { | |
552 | .d_revalidate = cifs_d_revalidate, | |
5fdae1f6 | 553 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 554 | }; |
b92327fe SF |
555 | |
556 | static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) | |
557 | { | |
558 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
559 | unsigned long hash; | |
560 | int i; | |
561 | ||
562 | hash = init_name_hash(); | |
563 | for (i = 0; i < q->len; i++) | |
564 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
565 | hash); | |
566 | q->hash = end_name_hash(hash); | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
571 | static int cifs_ci_compare(struct dentry *dentry, struct qstr *a, | |
572 | struct qstr *b) | |
573 | { | |
574 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
575 | ||
576 | if ((a->len == b->len) && | |
577 | (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) { | |
578 | /* | |
579 | * To preserve case, don't let an existing negative dentry's | |
580 | * case take precedence. If a is not a negative dentry, this | |
581 | * should have no side effects | |
582 | */ | |
44093ca2 | 583 | memcpy(a->name, b->name, a->len); |
b92327fe SF |
584 | return 0; |
585 | } | |
586 | return 1; | |
587 | } | |
588 | ||
589 | struct dentry_operations cifs_ci_dentry_ops = { | |
590 | .d_revalidate = cifs_d_revalidate, | |
591 | .d_hash = cifs_ci_hash, | |
592 | .d_compare = cifs_ci_compare, | |
593 | }; |