Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/dir.c | |
3 | * | |
4 | * vfs operations that deal with dentries | |
5fdae1f6 | 5 | * |
c3b2a0c6 | 6 | * Copyright (C) International Business Machines Corp., 2002,2009 |
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> | |
3bc303c2 | 27 | #include <linux/mount.h> |
6ca9f3ba | 28 | #include <linux/file.h> |
1da177e4 LT |
29 | #include "cifsfs.h" |
30 | #include "cifspdu.h" | |
31 | #include "cifsglob.h" | |
32 | #include "cifsproto.h" | |
33 | #include "cifs_debug.h" | |
34 | #include "cifs_fs_sb.h" | |
35 | ||
99ee4dbd | 36 | static void |
1da177e4 LT |
37 | renew_parental_timestamps(struct dentry *direntry) |
38 | { | |
5fdae1f6 SF |
39 | /* BB check if there is a way to get the kernel to do this or if we |
40 | really need this */ | |
1da177e4 LT |
41 | do { |
42 | direntry->d_time = jiffies; | |
43 | direntry = direntry->d_parent; | |
5fdae1f6 | 44 | } while (!IS_ROOT(direntry)); |
1da177e4 LT |
45 | } |
46 | ||
47 | /* Note: caller must free return buffer */ | |
48 | char * | |
49 | build_path_from_dentry(struct dentry *direntry) | |
50 | { | |
51 | struct dentry *temp; | |
2fe87f02 SF |
52 | int namelen; |
53 | int pplen; | |
646dd539 | 54 | int dfsplen; |
1da177e4 | 55 | char *full_path; |
88274815 | 56 | char dirsep; |
0d424ad0 JL |
57 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
58 | struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); | |
1da177e4 | 59 | |
5fdae1f6 | 60 | if (direntry == NULL) |
1da177e4 LT |
61 | return NULL; /* not much we can do if dentry is freed and |
62 | we need to reopen the file after it was closed implicitly | |
63 | when the server crashed */ | |
64 | ||
646dd539 SF |
65 | dirsep = CIFS_DIR_SEP(cifs_sb); |
66 | pplen = cifs_sb->prepathlen; | |
0d424ad0 JL |
67 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
68 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
646dd539 SF |
69 | else |
70 | dfsplen = 0; | |
1da177e4 | 71 | cifs_bp_rename_retry: |
646dd539 | 72 | namelen = pplen + dfsplen; |
1da177e4 LT |
73 | for (temp = direntry; !IS_ROOT(temp);) { |
74 | namelen += (1 + temp->d_name.len); | |
75 | temp = temp->d_parent; | |
5fdae1f6 | 76 | if (temp == NULL) { |
b6b38f70 | 77 | cERROR(1, "corrupt dentry"); |
1da177e4 LT |
78 | return NULL; |
79 | } | |
80 | } | |
81 | ||
82 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 83 | if (full_path == NULL) |
1da177e4 LT |
84 | return full_path; |
85 | full_path[namelen] = 0; /* trailing null */ | |
1da177e4 LT |
86 | for (temp = direntry; !IS_ROOT(temp);) { |
87 | namelen -= 1 + temp->d_name.len; | |
88 | if (namelen < 0) { | |
89 | break; | |
90 | } else { | |
7f57356b | 91 | full_path[namelen] = dirsep; |
1da177e4 LT |
92 | strncpy(full_path + namelen + 1, temp->d_name.name, |
93 | temp->d_name.len); | |
b6b38f70 | 94 | cFYI(0, "name: %s", full_path + namelen); |
1da177e4 LT |
95 | } |
96 | temp = temp->d_parent; | |
5fdae1f6 | 97 | if (temp == NULL) { |
b6b38f70 | 98 | cERROR(1, "corrupt dentry"); |
1da177e4 LT |
99 | kfree(full_path); |
100 | return NULL; | |
101 | } | |
102 | } | |
646dd539 | 103 | if (namelen != pplen + dfsplen) { |
b6b38f70 JP |
104 | cERROR(1, "did not end path lookup where expected namelen is %d", |
105 | namelen); | |
5fdae1f6 | 106 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
107 | of one of the parent directories (we can not lock the dentries |
108 | above us to prevent this, but retrying should be harmless) */ | |
109 | kfree(full_path); | |
1da177e4 LT |
110 | goto cifs_bp_rename_retry; |
111 | } | |
2fe87f02 SF |
112 | /* DIR_SEP already set for byte 0 / vs \ but not for |
113 | subsequent slashes in prepath which currently must | |
114 | be entered the right way - not sure if there is an alternative | |
115 | since the '\' is a valid posix character so we can not switch | |
116 | those safely to '/' if any are found in the middle of the prepath */ | |
117 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
646dd539 SF |
118 | |
119 | if (dfsplen) { | |
0d424ad0 | 120 | strncpy(full_path, tcon->treeName, dfsplen); |
646dd539 SF |
121 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
122 | int i; | |
123 | for (i = 0; i < dfsplen; i++) { | |
124 | if (full_path[i] == '\\') | |
125 | full_path[i] = '/'; | |
126 | } | |
127 | } | |
128 | } | |
129 | strncpy(full_path + dfsplen, CIFS_SB(direntry->d_sb)->prepath, pplen); | |
1da177e4 LT |
130 | return full_path; |
131 | } | |
132 | ||
3979877e | 133 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 LT |
134 | |
135 | int | |
136 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
137 | struct nameidata *nd) | |
138 | { | |
139 | int rc = -ENOENT; | |
140 | int xid; | |
67750fb9 | 141 | int create_options = CREATE_NOT_DIR; |
590a3fe0 | 142 | __u32 oplock = 0; |
c3b2a0c6 SF |
143 | int oflags; |
144 | /* | |
145 | * BB below access is probably too much for mknod to request | |
146 | * but we have to do query and setpathinfo so requesting | |
147 | * less could fail (unless we want to request getatr and setatr | |
148 | * permissions (only). At least for POSIX we do not have to | |
149 | * request so much. | |
150 | */ | |
1da177e4 LT |
151 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; |
152 | __u16 fileHandle; | |
153 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 154 | struct tcon_link *tlink; |
f818dd55 | 155 | struct cifsTconInfo *tcon; |
1da177e4 | 156 | char *full_path = NULL; |
fb8c4b14 | 157 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 158 | struct inode *newinode = NULL; |
1da177e4 | 159 | int disposition = FILE_OVERWRITE_IF; |
1da177e4 LT |
160 | |
161 | xid = GetXid(); | |
162 | ||
163 | cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 JL |
164 | tlink = cifs_sb_tlink(cifs_sb); |
165 | if (IS_ERR(tlink)) { | |
166 | FreeXid(xid); | |
167 | return PTR_ERR(tlink); | |
1da177e4 | 168 | } |
7ffec372 | 169 | tcon = tlink_tcon(tlink); |
1da177e4 | 170 | |
c3b2a0c6 SF |
171 | if (oplockEnabled) |
172 | oplock = REQ_OPLOCK; | |
f818dd55 | 173 | |
c3b2a0c6 | 174 | if (nd && (nd->flags & LOOKUP_OPEN)) |
608712fe | 175 | oflags = nd->intent.open.file->f_flags; |
c3b2a0c6 | 176 | else |
608712fe | 177 | oflags = O_RDONLY | O_CREAT; |
c3b2a0c6 | 178 | |
7ffec372 JL |
179 | full_path = build_path_from_dentry(direntry); |
180 | if (full_path == NULL) { | |
181 | rc = -ENOMEM; | |
182 | goto cifs_create_out; | |
183 | } | |
184 | ||
c3b2a0c6 SF |
185 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && |
186 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
187 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
fa588e0c | 188 | rc = cifs_posix_open(full_path, &newinode, |
fa588e0c | 189 | inode->i_sb, mode, oflags, &oplock, &fileHandle, xid); |
c3b2a0c6 SF |
190 | /* EIO could indicate that (posix open) operation is not |
191 | supported, despite what server claimed in capability | |
25985edc | 192 | negotiation. EREMOTE indicates DFS junction, which is not |
c3b2a0c6 SF |
193 | handled in posix open */ |
194 | ||
90e4ee5d | 195 | if (rc == 0) { |
90e4ee5d SF |
196 | if (newinode == NULL) /* query inode info */ |
197 | goto cifs_create_get_file_info; | |
198 | else /* success, no need to query */ | |
199 | goto cifs_create_set_dentry; | |
200 | } else if ((rc != -EIO) && (rc != -EREMOTE) && | |
703a3b8e | 201 | (rc != -EOPNOTSUPP) && (rc != -EINVAL)) |
c3b2a0c6 SF |
202 | goto cifs_create_out; |
203 | /* else fallthrough to retry, using older open call, this is | |
204 | case where server does not support this SMB level, and | |
205 | falsely claims capability (also get here for DFS case | |
206 | which should be rare for path not covered on files) */ | |
207 | } | |
e08fc045 | 208 | |
c3b2a0c6 SF |
209 | if (nd && (nd->flags & LOOKUP_OPEN)) { |
210 | /* if the file is going to stay open, then we | |
211 | need to set the desired access properly */ | |
e08fc045 | 212 | desiredAccess = 0; |
608712fe | 213 | if (OPEN_FMODE(oflags) & FMODE_READ) |
c3b2a0c6 | 214 | desiredAccess |= GENERIC_READ; /* is this too little? */ |
608712fe | 215 | if (OPEN_FMODE(oflags) & FMODE_WRITE) |
e08fc045 | 216 | desiredAccess |= GENERIC_WRITE; |
1da177e4 | 217 | |
5fdae1f6 | 218 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 219 | disposition = FILE_CREATE; |
5fdae1f6 | 220 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 221 | disposition = FILE_OVERWRITE_IF; |
5fdae1f6 | 222 | else if ((oflags & O_CREAT) == O_CREAT) |
1da177e4 | 223 | disposition = FILE_OPEN_IF; |
ad7a2926 | 224 | else |
b6b38f70 | 225 | cFYI(1, "Create flag not set in create function"); |
1da177e4 LT |
226 | } |
227 | ||
5fdae1f6 SF |
228 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
229 | ACLs */ | |
1da177e4 | 230 | |
5fdae1f6 SF |
231 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
232 | if (buf == NULL) { | |
232341ba JL |
233 | rc = -ENOMEM; |
234 | goto cifs_create_out; | |
1da177e4 | 235 | } |
67750fb9 | 236 | |
67750fb9 JL |
237 | /* |
238 | * if we're not using unix extensions, see if we need to set | |
239 | * ATTR_READONLY on the create call | |
240 | */ | |
f818dd55 | 241 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
242 | create_options |= CREATE_OPTION_READONLY; |
243 | ||
a6e8a845 | 244 | if (tcon->ses->capabilities & CAP_NT_SMBS) |
f818dd55 | 245 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
67750fb9 | 246 | desiredAccess, create_options, |
737b758c SF |
247 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
248 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5bafd765 SF |
249 | else |
250 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
251 | ||
5fdae1f6 | 252 | if (rc == -EIO) { |
a9d02ad4 | 253 | /* old server, retry the open legacy style */ |
f818dd55 | 254 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
67750fb9 | 255 | desiredAccess, create_options, |
a9d02ad4 SF |
256 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
257 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5fdae1f6 | 258 | } |
1da177e4 | 259 | if (rc) { |
b6b38f70 | 260 | cFYI(1, "cifs_create returned 0x%x", rc); |
c3b2a0c6 SF |
261 | goto cifs_create_out; |
262 | } | |
263 | ||
264 | /* If Open reported that we actually created a file | |
265 | then we now have to set the mode if possible */ | |
266 | if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { | |
267 | struct cifs_unix_set_info_args args = { | |
4e1e7fb9 JL |
268 | .mode = mode, |
269 | .ctime = NO_CHANGE_64, | |
270 | .atime = NO_CHANGE_64, | |
271 | .mtime = NO_CHANGE_64, | |
272 | .device = 0, | |
c3b2a0c6 SF |
273 | }; |
274 | ||
275 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
276 | args.uid = (__u64) current_fsuid(); | |
277 | if (inode->i_mode & S_ISGID) | |
278 | args.gid = (__u64) inode->i_gid; | |
279 | else | |
280 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 281 | } else { |
c3b2a0c6 SF |
282 | args.uid = NO_CHANGE_64; |
283 | args.gid = NO_CHANGE_64; | |
1da177e4 | 284 | } |
d44a9fe2 JL |
285 | CIFSSMBUnixSetFileInfo(xid, tcon, &args, fileHandle, |
286 | current->tgid); | |
c3b2a0c6 SF |
287 | } else { |
288 | /* BB implement mode setting via Windows security | |
289 | descriptors e.g. */ | |
290 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ | |
291 | ||
292 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
293 | } | |
1da177e4 | 294 | |
c3b2a0c6 SF |
295 | cifs_create_get_file_info: |
296 | /* server might mask mode so we have to query for it */ | |
297 | if (tcon->unix_ext) | |
298 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
299 | inode->i_sb, xid); | |
300 | else { | |
301 | rc = cifs_get_inode_info(&newinode, full_path, buf, | |
302 | inode->i_sb, xid, &fileHandle); | |
303 | if (newinode) { | |
304 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
305 | newinode->i_mode = mode; | |
306 | if ((oplock & CIFS_CREATE_ACTION) && | |
307 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { | |
308 | newinode->i_uid = current_fsuid(); | |
309 | if (inode->i_mode & S_ISGID) | |
310 | newinode->i_gid = inode->i_gid; | |
311 | else | |
312 | newinode->i_gid = current_fsgid(); | |
6473a559 | 313 | } |
1da177e4 | 314 | } |
c3b2a0c6 | 315 | } |
1da177e4 | 316 | |
c3b2a0c6 SF |
317 | cifs_create_set_dentry: |
318 | if (rc == 0) | |
1c929cfe | 319 | d_instantiate(direntry, newinode); |
c3b2a0c6 | 320 | else |
b6b38f70 | 321 | cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
c3b2a0c6 | 322 | |
2422f676 | 323 | if (newinode && nd && (nd->flags & LOOKUP_OPEN)) { |
fdb36038 | 324 | struct cifsFileInfo *pfile_info; |
6ca9f3ba JL |
325 | struct file *filp; |
326 | ||
327 | filp = lookup_instantiate_filp(nd, direntry, generic_file_open); | |
328 | if (IS_ERR(filp)) { | |
329 | rc = PTR_ERR(filp); | |
330 | CIFSSMBClose(xid, tcon, fileHandle); | |
331 | goto cifs_create_out; | |
332 | } | |
333 | ||
abfe1eed | 334 | pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock); |
6ca9f3ba JL |
335 | if (pfile_info == NULL) { |
336 | fput(filp); | |
337 | CIFSSMBClose(xid, tcon, fileHandle); | |
fdb36038 | 338 | rc = -ENOMEM; |
6ca9f3ba | 339 | } |
2422f676 JL |
340 | } else { |
341 | CIFSSMBClose(xid, tcon, fileHandle); | |
5fdae1f6 | 342 | } |
2422f676 | 343 | |
d14537f1 SF |
344 | cifs_create_out: |
345 | kfree(buf); | |
346 | kfree(full_path); | |
7ffec372 | 347 | cifs_put_tlink(tlink); |
1da177e4 | 348 | FreeXid(xid); |
1da177e4 LT |
349 | return rc; |
350 | } | |
351 | ||
5fdae1f6 SF |
352 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
353 | dev_t device_number) | |
1da177e4 LT |
354 | { |
355 | int rc = -EPERM; | |
356 | int xid; | |
357 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 358 | struct tcon_link *tlink; |
1da177e4 LT |
359 | struct cifsTconInfo *pTcon; |
360 | char *full_path = NULL; | |
fb8c4b14 | 361 | struct inode *newinode = NULL; |
5d9ac7fd JL |
362 | int oplock = 0; |
363 | u16 fileHandle; | |
364 | FILE_ALL_INFO *buf = NULL; | |
365 | unsigned int bytes_written; | |
366 | struct win_dev *pdev; | |
1da177e4 LT |
367 | |
368 | if (!old_valid_dev(device_number)) | |
369 | return -EINVAL; | |
370 | ||
1da177e4 | 371 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
372 | tlink = cifs_sb_tlink(cifs_sb); |
373 | if (IS_ERR(tlink)) | |
374 | return PTR_ERR(tlink); | |
375 | ||
376 | pTcon = tlink_tcon(tlink); | |
377 | ||
378 | xid = GetXid(); | |
1da177e4 | 379 | |
1da177e4 | 380 | full_path = build_path_from_dentry(direntry); |
5d9ac7fd | 381 | if (full_path == NULL) { |
1da177e4 | 382 | rc = -ENOMEM; |
5d9ac7fd JL |
383 | goto mknod_out; |
384 | } | |
385 | ||
386 | if (pTcon->unix_ext) { | |
4e1e7fb9 | 387 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 388 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
389 | .ctime = NO_CHANGE_64, |
390 | .atime = NO_CHANGE_64, | |
391 | .mtime = NO_CHANGE_64, | |
392 | .device = device_number, | |
393 | }; | |
5fdae1f6 | 394 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
395 | args.uid = (__u64) current_fsuid(); |
396 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 397 | } else { |
4e1e7fb9 JL |
398 | args.uid = NO_CHANGE_64; |
399 | args.gid = NO_CHANGE_64; | |
1da177e4 | 400 | } |
01ea95e3 JL |
401 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
402 | cifs_sb->local_nls, | |
403 | cifs_sb->mnt_cifs_flags & | |
404 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5d9ac7fd JL |
405 | if (rc) |
406 | goto mknod_out; | |
1da177e4 | 407 | |
5d9ac7fd | 408 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 409 | inode->i_sb, xid); |
eda3c029 | 410 | |
5d9ac7fd JL |
411 | if (rc == 0) |
412 | d_instantiate(direntry, newinode); | |
413 | goto mknod_out; | |
1da177e4 LT |
414 | } |
415 | ||
5d9ac7fd JL |
416 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) |
417 | goto mknod_out; | |
418 | ||
419 | ||
420 | cFYI(1, "sfu compat create special file"); | |
421 | ||
422 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
423 | if (buf == NULL) { | |
424 | kfree(full_path); | |
425 | rc = -ENOMEM; | |
426 | FreeXid(xid); | |
427 | return rc; | |
428 | } | |
429 | ||
430 | /* FIXME: would WRITE_OWNER | WRITE_DAC be better? */ | |
431 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, | |
432 | GENERIC_WRITE, CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
433 | &fileHandle, &oplock, buf, cifs_sb->local_nls, | |
434 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
435 | if (rc) | |
436 | goto mknod_out; | |
437 | ||
438 | /* BB Do not bother to decode buf since no local inode yet to put | |
439 | * timestamps in, but we can reuse it safely */ | |
440 | ||
441 | pdev = (struct win_dev *)buf; | |
442 | if (S_ISCHR(mode)) { | |
443 | memcpy(pdev->type, "IntxCHR", 8); | |
444 | pdev->major = | |
445 | cpu_to_le64(MAJOR(device_number)); | |
446 | pdev->minor = | |
447 | cpu_to_le64(MINOR(device_number)); | |
448 | rc = CIFSSMBWrite(xid, pTcon, | |
449 | fileHandle, | |
450 | sizeof(struct win_dev), | |
451 | 0, &bytes_written, (char *)pdev, | |
452 | NULL, 0); | |
453 | } else if (S_ISBLK(mode)) { | |
454 | memcpy(pdev->type, "IntxBLK", 8); | |
455 | pdev->major = | |
456 | cpu_to_le64(MAJOR(device_number)); | |
457 | pdev->minor = | |
458 | cpu_to_le64(MINOR(device_number)); | |
459 | rc = CIFSSMBWrite(xid, pTcon, | |
460 | fileHandle, | |
461 | sizeof(struct win_dev), | |
462 | 0, &bytes_written, (char *)pdev, | |
463 | NULL, 0); | |
464 | } /* else if (S_ISFIFO) */ | |
465 | CIFSSMBClose(xid, pTcon, fileHandle); | |
466 | d_drop(direntry); | |
467 | ||
468 | /* FIXME: add code here to set EAs */ | |
469 | ||
470 | mknod_out: | |
d14537f1 | 471 | kfree(full_path); |
5d9ac7fd | 472 | kfree(buf); |
1da177e4 | 473 | FreeXid(xid); |
7ffec372 | 474 | cifs_put_tlink(tlink); |
1da177e4 LT |
475 | return rc; |
476 | } | |
477 | ||
1da177e4 | 478 | struct dentry * |
5fdae1f6 SF |
479 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
480 | struct nameidata *nd) | |
1da177e4 LT |
481 | { |
482 | int xid; | |
483 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
590a3fe0 | 484 | __u32 oplock = 0; |
a6ce4932 SF |
485 | __u16 fileHandle = 0; |
486 | bool posix_open = false; | |
1da177e4 | 487 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 488 | struct tcon_link *tlink; |
1da177e4 | 489 | struct cifsTconInfo *pTcon; |
2422f676 | 490 | struct cifsFileInfo *cfile; |
1da177e4 LT |
491 | struct inode *newInode = NULL; |
492 | char *full_path = NULL; | |
a6ce4932 | 493 | struct file *filp; |
1da177e4 LT |
494 | |
495 | xid = GetXid(); | |
496 | ||
b6b38f70 JP |
497 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", |
498 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 499 | |
1da177e4 LT |
500 | /* check whether path exists */ |
501 | ||
502 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
7ffec372 JL |
503 | tlink = cifs_sb_tlink(cifs_sb); |
504 | if (IS_ERR(tlink)) { | |
505 | FreeXid(xid); | |
506 | return (struct dentry *)tlink; | |
507 | } | |
508 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 509 | |
296034f7 SF |
510 | /* |
511 | * Don't allow the separator character in a path component. | |
512 | * The VFS will not allow "/", but "\" is allowed by posix. | |
513 | */ | |
514 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
515 | int i; | |
516 | for (i = 0; i < direntry->d_name.len; i++) | |
517 | if (direntry->d_name.name[i] == '\\') { | |
b6b38f70 | 518 | cFYI(1, "Invalid file name"); |
7ffec372 JL |
519 | rc = -EINVAL; |
520 | goto lookup_out; | |
296034f7 SF |
521 | } |
522 | } | |
523 | ||
5ddf1e0f JL |
524 | /* |
525 | * O_EXCL: optimize away the lookup, but don't hash the dentry. Let | |
526 | * the VFS handle the create. | |
527 | */ | |
8e6c0332 | 528 | if (nd && (nd->flags & LOOKUP_EXCL)) { |
5ddf1e0f | 529 | d_instantiate(direntry, NULL); |
7ffec372 JL |
530 | rc = 0; |
531 | goto lookup_out; | |
5ddf1e0f JL |
532 | } |
533 | ||
1da177e4 LT |
534 | /* can not grab the rename sem here since it would |
535 | deadlock in the cases (beginning of sys_rename itself) | |
536 | in which we already have the sb rename sem */ | |
537 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 538 | if (full_path == NULL) { |
7ffec372 JL |
539 | rc = -ENOMEM; |
540 | goto lookup_out; | |
1da177e4 LT |
541 | } |
542 | ||
543 | if (direntry->d_inode != NULL) { | |
b6b38f70 | 544 | cFYI(1, "non-NULL inode in lookup"); |
1da177e4 | 545 | } else { |
b6b38f70 | 546 | cFYI(1, "NULL inode in lookup"); |
1da177e4 | 547 | } |
b6b38f70 | 548 | cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); |
1da177e4 | 549 | |
8db14ca1 SF |
550 | /* Posix open is only called (at lookup time) for file create now. |
551 | * For opens (rather than creates), because we do not know if it | |
552 | * is a file or directory yet, and current Samba no longer allows | |
553 | * us to do posix open on dirs, we could end up wasting an open call | |
554 | * on what turns out to be a dir. For file opens, we wait to call posix | |
555 | * open till cifs_open. It could be added here (lookup) in the future | |
556 | * but the performance tradeoff of the extra network request when EISDIR | |
557 | * or EACCES is returned would have to be weighed against the 50% | |
558 | * reduction in network traffic in the other paths. | |
559 | */ | |
a6ce4932 | 560 | if (pTcon->unix_ext) { |
8e6c0332 | 561 | if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) && |
8db14ca1 | 562 | (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && |
608712fe | 563 | (nd->intent.open.file->f_flags & O_CREAT)) { |
2422f676 | 564 | rc = cifs_posix_open(full_path, &newInode, |
fa588e0c | 565 | parent_dir_inode->i_sb, |
703a3b8e | 566 | nd->intent.open.create_mode, |
608712fe | 567 | nd->intent.open.file->f_flags, &oplock, |
a6ce4932 | 568 | &fileHandle, xid); |
8db14ca1 SF |
569 | /* |
570 | * The check below works around a bug in POSIX | |
571 | * open in samba versions 3.3.1 and earlier where | |
572 | * open could incorrectly fail with invalid parameter. | |
573 | * If either that or op not supported returned, follow | |
574 | * the normal lookup. | |
575 | */ | |
576 | if ((rc == 0) || (rc == -ENOENT)) | |
577 | posix_open = true; | |
578 | else if ((rc == -EINVAL) || (rc != -EOPNOTSUPP)) | |
579 | pTcon->broken_posix_open = true; | |
a6ce4932 SF |
580 | } |
581 | if (!posix_open) | |
582 | rc = cifs_get_inode_info_unix(&newInode, full_path, | |
583 | parent_dir_inode->i_sb, xid); | |
584 | } else | |
1da177e4 | 585 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 586 | parent_dir_inode->i_sb, xid, NULL); |
1da177e4 LT |
587 | |
588 | if ((rc == 0) && (newInode != NULL)) { | |
1da177e4 | 589 | d_add(direntry, newInode); |
2422f676 | 590 | if (posix_open) { |
6ca9f3ba JL |
591 | filp = lookup_instantiate_filp(nd, direntry, |
592 | generic_file_open); | |
593 | if (IS_ERR(filp)) { | |
594 | rc = PTR_ERR(filp); | |
595 | CIFSSMBClose(xid, pTcon, fileHandle); | |
596 | goto lookup_out; | |
597 | } | |
598 | ||
abfe1eed JL |
599 | cfile = cifs_new_fileinfo(fileHandle, filp, tlink, |
600 | oplock); | |
2422f676 | 601 | if (cfile == NULL) { |
6ca9f3ba | 602 | fput(filp); |
2422f676 JL |
603 | CIFSSMBClose(xid, pTcon, fileHandle); |
604 | rc = -ENOMEM; | |
605 | goto lookup_out; | |
606 | } | |
2422f676 | 607 | } |
5fdae1f6 | 608 | /* since paths are not looked up by component - the parent |
3abb9272 | 609 | directories are presumed to be good here */ |
1da177e4 LT |
610 | renew_parental_timestamps(direntry); |
611 | ||
612 | } else if (rc == -ENOENT) { | |
613 | rc = 0; | |
3abb9272 | 614 | direntry->d_time = jiffies; |
1da177e4 | 615 | d_add(direntry, NULL); |
5fdae1f6 SF |
616 | /* if it was once a directory (but how can we tell?) we could do |
617 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 618 | } else if (rc != -EACCES) { |
b6b38f70 | 619 | cERROR(1, "Unexpected lookup error %d", rc); |
ed2b9170 SF |
620 | /* We special case check for Access Denied - since that |
621 | is a common return code */ | |
1da177e4 LT |
622 | } |
623 | ||
2422f676 | 624 | lookup_out: |
d14537f1 | 625 | kfree(full_path); |
7ffec372 | 626 | cifs_put_tlink(tlink); |
1da177e4 LT |
627 | FreeXid(xid); |
628 | return ERR_PTR(rc); | |
629 | } | |
630 | ||
1da177e4 LT |
631 | static int |
632 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
633 | { | |
34286d66 NP |
634 | if (nd->flags & LOOKUP_RCU) |
635 | return -ECHILD; | |
636 | ||
1da177e4 | 637 | if (direntry->d_inode) { |
df2cf170 | 638 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 639 | return 0; |
262f86ad NP |
640 | else |
641 | return 1; | |
1da177e4 LT |
642 | } |
643 | ||
262f86ad NP |
644 | /* |
645 | * This may be nfsd (or something), anyway, we can't see the | |
646 | * intent of this. So, since this can be for creation, drop it. | |
647 | */ | |
648 | if (!nd) | |
649 | return 0; | |
650 | ||
651 | /* | |
652 | * Drop the negative dentry, in order to make sure to use the | |
653 | * case sensitive name which is specified by user if this is | |
654 | * for creation. | |
655 | */ | |
656 | if (!(nd->flags & (LOOKUP_CONTINUE | LOOKUP_PARENT))) { | |
657 | if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) | |
658 | return 0; | |
659 | } | |
660 | ||
661 | if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) | |
662 | return 0; | |
663 | ||
664 | return 1; | |
1da177e4 LT |
665 | } |
666 | ||
667 | /* static int cifs_d_delete(struct dentry *direntry) | |
668 | { | |
669 | int rc = 0; | |
670 | ||
b6b38f70 | 671 | cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
1da177e4 LT |
672 | |
673 | return rc; | |
674 | } */ | |
675 | ||
4fd03e84 | 676 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 677 | .d_revalidate = cifs_d_revalidate, |
01c64fea | 678 | .d_automount = cifs_dfs_d_automount, |
5fdae1f6 | 679 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 680 | }; |
b92327fe | 681 | |
b1e6a015 NP |
682 | static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, |
683 | struct qstr *q) | |
b92327fe | 684 | { |
b1e6a015 | 685 | struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; |
b92327fe SF |
686 | unsigned long hash; |
687 | int i; | |
688 | ||
689 | hash = init_name_hash(); | |
690 | for (i = 0; i < q->len; i++) | |
691 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
692 | hash); | |
693 | q->hash = end_name_hash(hash); | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
621e155a NP |
698 | static int cifs_ci_compare(const struct dentry *parent, |
699 | const struct inode *pinode, | |
700 | const struct dentry *dentry, const struct inode *inode, | |
701 | unsigned int len, const char *str, const struct qstr *name) | |
b92327fe | 702 | { |
621e155a | 703 | struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; |
b92327fe | 704 | |
621e155a NP |
705 | if ((name->len == len) && |
706 | (nls_strnicmp(codepage, name->name, str, len) == 0)) | |
b92327fe | 707 | return 0; |
b92327fe SF |
708 | return 1; |
709 | } | |
710 | ||
4fd03e84 | 711 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
712 | .d_revalidate = cifs_d_revalidate, |
713 | .d_hash = cifs_ci_hash, | |
714 | .d_compare = cifs_ci_compare, | |
01c64fea | 715 | .d_automount = cifs_dfs_d_automount, |
b92327fe | 716 | }; |