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 | 52 | int namelen; |
646dd539 | 53 | int dfsplen; |
1da177e4 | 54 | char *full_path; |
88274815 | 55 | char dirsep; |
0d424ad0 | 56 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 57 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
dc137bf5 | 58 | unsigned seq; |
1da177e4 | 59 | |
646dd539 | 60 | dirsep = CIFS_DIR_SEP(cifs_sb); |
0d424ad0 JL |
61 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
62 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
646dd539 SF |
63 | else |
64 | dfsplen = 0; | |
1da177e4 | 65 | cifs_bp_rename_retry: |
f87d39d9 | 66 | namelen = dfsplen; |
dc137bf5 AV |
67 | seq = read_seqbegin(&rename_lock); |
68 | rcu_read_lock(); | |
1da177e4 LT |
69 | for (temp = direntry; !IS_ROOT(temp);) { |
70 | namelen += (1 + temp->d_name.len); | |
71 | temp = temp->d_parent; | |
5fdae1f6 | 72 | if (temp == NULL) { |
b6b38f70 | 73 | cERROR(1, "corrupt dentry"); |
dc137bf5 | 74 | rcu_read_unlock(); |
1da177e4 LT |
75 | return NULL; |
76 | } | |
77 | } | |
dc137bf5 | 78 | rcu_read_unlock(); |
1da177e4 LT |
79 | |
80 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 81 | if (full_path == NULL) |
1da177e4 LT |
82 | return full_path; |
83 | full_path[namelen] = 0; /* trailing null */ | |
dc137bf5 | 84 | rcu_read_lock(); |
1da177e4 | 85 | for (temp = direntry; !IS_ROOT(temp);) { |
dc137bf5 | 86 | spin_lock(&temp->d_lock); |
1da177e4 LT |
87 | namelen -= 1 + temp->d_name.len; |
88 | if (namelen < 0) { | |
dc137bf5 | 89 | spin_unlock(&temp->d_lock); |
1da177e4 LT |
90 | break; |
91 | } else { | |
7f57356b | 92 | full_path[namelen] = dirsep; |
1da177e4 LT |
93 | strncpy(full_path + namelen + 1, temp->d_name.name, |
94 | temp->d_name.len); | |
b6b38f70 | 95 | cFYI(0, "name: %s", full_path + namelen); |
1da177e4 | 96 | } |
dc137bf5 | 97 | spin_unlock(&temp->d_lock); |
1da177e4 | 98 | temp = temp->d_parent; |
5fdae1f6 | 99 | if (temp == NULL) { |
b6b38f70 | 100 | cERROR(1, "corrupt dentry"); |
dc137bf5 | 101 | rcu_read_unlock(); |
1da177e4 LT |
102 | kfree(full_path); |
103 | return NULL; | |
104 | } | |
105 | } | |
dc137bf5 AV |
106 | rcu_read_unlock(); |
107 | if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) { | |
fa71f447 JL |
108 | cFYI(1, "did not end path lookup where expected. namelen=%d " |
109 | "dfsplen=%d", namelen, dfsplen); | |
5fdae1f6 | 110 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
111 | of one of the parent directories (we can not lock the dentries |
112 | above us to prevent this, but retrying should be harmless) */ | |
113 | kfree(full_path); | |
1da177e4 LT |
114 | goto cifs_bp_rename_retry; |
115 | } | |
2fe87f02 SF |
116 | /* DIR_SEP already set for byte 0 / vs \ but not for |
117 | subsequent slashes in prepath which currently must | |
118 | be entered the right way - not sure if there is an alternative | |
119 | since the '\' is a valid posix character so we can not switch | |
120 | those safely to '/' if any are found in the middle of the prepath */ | |
121 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
646dd539 SF |
122 | |
123 | if (dfsplen) { | |
0d424ad0 | 124 | strncpy(full_path, tcon->treeName, dfsplen); |
646dd539 SF |
125 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
126 | int i; | |
127 | for (i = 0; i < dfsplen; i++) { | |
128 | if (full_path[i] == '\\') | |
129 | full_path[i] = '/'; | |
130 | } | |
131 | } | |
132 | } | |
1da177e4 LT |
133 | return full_path; |
134 | } | |
135 | ||
d2c12719 MS |
136 | /* |
137 | * Don't allow the separator character in a path component. | |
138 | * The VFS will not allow "/", but "\" is allowed by posix. | |
139 | */ | |
140 | static int | |
141 | check_name(struct dentry *direntry) | |
142 | { | |
143 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); | |
144 | int i; | |
145 | ||
146 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
147 | for (i = 0; i < direntry->d_name.len; i++) { | |
148 | if (direntry->d_name.name[i] == '\\') { | |
149 | cFYI(1, "Invalid file name"); | |
150 | return -EINVAL; | |
151 | } | |
152 | } | |
153 | } | |
154 | return 0; | |
155 | } | |
156 | ||
157 | ||
3979877e | 158 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 | 159 | |
6d5786a3 PS |
160 | static int |
161 | cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, | |
162 | struct tcon_link *tlink, unsigned oflags, umode_t mode, | |
163 | __u32 *oplock, __u16 *fileHandle, int *created) | |
1da177e4 LT |
164 | { |
165 | int rc = -ENOENT; | |
67750fb9 | 166 | int create_options = CREATE_NOT_DIR; |
d2c12719 MS |
167 | int desiredAccess; |
168 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
169 | struct cifs_tcon *tcon = tlink_tcon(tlink); | |
1da177e4 | 170 | char *full_path = NULL; |
fb8c4b14 | 171 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 172 | struct inode *newinode = NULL; |
d2c12719 | 173 | int disposition; |
1da177e4 | 174 | |
d2c12719 | 175 | *oplock = 0; |
10b9b98e | 176 | if (tcon->ses->server->oplocks) |
d2c12719 | 177 | *oplock = REQ_OPLOCK; |
c3b2a0c6 | 178 | |
7ffec372 JL |
179 | full_path = build_path_from_dentry(direntry); |
180 | if (full_path == NULL) { | |
181 | rc = -ENOMEM; | |
d2c12719 | 182 | goto out; |
7ffec372 JL |
183 | } |
184 | ||
29e20f9c | 185 | if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open && |
c3b2a0c6 SF |
186 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
187 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
fa588e0c | 188 | rc = cifs_posix_open(full_path, &newinode, |
d2c12719 MS |
189 | inode->i_sb, mode, oflags, oplock, fileHandle, xid); |
190 | switch (rc) { | |
191 | case 0: | |
192 | if (newinode == NULL) { | |
193 | /* query inode info */ | |
90e4ee5d | 194 | goto cifs_create_get_file_info; |
d2c12719 MS |
195 | } |
196 | ||
197 | if (!S_ISREG(newinode->i_mode)) { | |
198 | /* | |
199 | * The server may allow us to open things like | |
200 | * FIFOs, but the client isn't set up to deal | |
201 | * with that. If it's not a regular file, just | |
202 | * close it and proceed as if it were a normal | |
203 | * lookup. | |
204 | */ | |
205 | CIFSSMBClose(xid, tcon, *fileHandle); | |
206 | goto cifs_create_get_file_info; | |
207 | } | |
208 | /* success, no need to query */ | |
209 | goto cifs_create_set_dentry; | |
210 | ||
211 | case -ENOENT: | |
212 | goto cifs_create_get_file_info; | |
213 | ||
214 | case -EIO: | |
215 | case -EINVAL: | |
216 | /* | |
217 | * EIO could indicate that (posix open) operation is not | |
218 | * supported, despite what server claimed in capability | |
219 | * negotiation. | |
220 | * | |
221 | * POSIX open in samba versions 3.3.1 and earlier could | |
222 | * incorrectly fail with invalid parameter. | |
223 | */ | |
224 | tcon->broken_posix_open = true; | |
225 | break; | |
226 | ||
227 | case -EREMOTE: | |
228 | case -EOPNOTSUPP: | |
229 | /* | |
230 | * EREMOTE indicates DFS junction, which is not handled | |
231 | * in posix open. If either that or op not supported | |
232 | * returned, follow the normal lookup. | |
233 | */ | |
234 | break; | |
e08fc045 | 235 | |
d2c12719 MS |
236 | default: |
237 | goto out; | |
238 | } | |
239 | /* | |
240 | * fallthrough to retry, using older open call, this is case | |
241 | * where server does not support this SMB level, and falsely | |
242 | * claims capability (also get here for DFS case which should be | |
243 | * rare for path not covered on files) | |
244 | */ | |
1da177e4 LT |
245 | } |
246 | ||
d2c12719 MS |
247 | desiredAccess = 0; |
248 | if (OPEN_FMODE(oflags) & FMODE_READ) | |
249 | desiredAccess |= GENERIC_READ; /* is this too little? */ | |
250 | if (OPEN_FMODE(oflags) & FMODE_WRITE) | |
251 | desiredAccess |= GENERIC_WRITE; | |
252 | ||
253 | disposition = FILE_OVERWRITE_IF; | |
254 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) | |
255 | disposition = FILE_CREATE; | |
256 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) | |
257 | disposition = FILE_OVERWRITE_IF; | |
258 | else if ((oflags & O_CREAT) == O_CREAT) | |
259 | disposition = FILE_OPEN_IF; | |
260 | else | |
261 | cFYI(1, "Create flag not set in create function"); | |
262 | ||
5fdae1f6 SF |
263 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
264 | ACLs */ | |
1da177e4 | 265 | |
5fdae1f6 SF |
266 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
267 | if (buf == NULL) { | |
232341ba | 268 | rc = -ENOMEM; |
d2c12719 | 269 | goto out; |
1da177e4 | 270 | } |
67750fb9 | 271 | |
67750fb9 JL |
272 | /* |
273 | * if we're not using unix extensions, see if we need to set | |
274 | * ATTR_READONLY on the create call | |
275 | */ | |
f818dd55 | 276 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
277 | create_options |= CREATE_OPTION_READONLY; |
278 | ||
3d3ea8e6 SP |
279 | if (backup_cred(cifs_sb)) |
280 | create_options |= CREATE_OPEN_BACKUP_INTENT; | |
281 | ||
a6e8a845 | 282 | if (tcon->ses->capabilities & CAP_NT_SMBS) |
f818dd55 | 283 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
67750fb9 | 284 | desiredAccess, create_options, |
d2c12719 | 285 | fileHandle, oplock, buf, cifs_sb->local_nls, |
737b758c | 286 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
5bafd765 SF |
287 | else |
288 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
289 | ||
5fdae1f6 | 290 | if (rc == -EIO) { |
a9d02ad4 | 291 | /* old server, retry the open legacy style */ |
f818dd55 | 292 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
67750fb9 | 293 | desiredAccess, create_options, |
d2c12719 | 294 | fileHandle, oplock, buf, cifs_sb->local_nls, |
a9d02ad4 | 295 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
5fdae1f6 | 296 | } |
1da177e4 | 297 | if (rc) { |
b6b38f70 | 298 | cFYI(1, "cifs_create returned 0x%x", rc); |
d2c12719 | 299 | goto out; |
c3b2a0c6 SF |
300 | } |
301 | ||
302 | /* If Open reported that we actually created a file | |
303 | then we now have to set the mode if possible */ | |
d2c12719 | 304 | if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) { |
c3b2a0c6 | 305 | struct cifs_unix_set_info_args args = { |
4e1e7fb9 JL |
306 | .mode = mode, |
307 | .ctime = NO_CHANGE_64, | |
308 | .atime = NO_CHANGE_64, | |
309 | .mtime = NO_CHANGE_64, | |
310 | .device = 0, | |
c3b2a0c6 SF |
311 | }; |
312 | ||
47237687 | 313 | *created |= FILE_CREATED; |
c3b2a0c6 SF |
314 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
315 | args.uid = (__u64) current_fsuid(); | |
316 | if (inode->i_mode & S_ISGID) | |
317 | args.gid = (__u64) inode->i_gid; | |
318 | else | |
319 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 320 | } else { |
c3b2a0c6 SF |
321 | args.uid = NO_CHANGE_64; |
322 | args.gid = NO_CHANGE_64; | |
1da177e4 | 323 | } |
d2c12719 | 324 | CIFSSMBUnixSetFileInfo(xid, tcon, &args, *fileHandle, |
d44a9fe2 | 325 | current->tgid); |
c3b2a0c6 SF |
326 | } else { |
327 | /* BB implement mode setting via Windows security | |
328 | descriptors e.g. */ | |
329 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ | |
330 | ||
331 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
332 | } | |
1da177e4 | 333 | |
c3b2a0c6 SF |
334 | cifs_create_get_file_info: |
335 | /* server might mask mode so we have to query for it */ | |
336 | if (tcon->unix_ext) | |
337 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
338 | inode->i_sb, xid); | |
339 | else { | |
340 | rc = cifs_get_inode_info(&newinode, full_path, buf, | |
d2c12719 | 341 | inode->i_sb, xid, fileHandle); |
c3b2a0c6 SF |
342 | if (newinode) { |
343 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
344 | newinode->i_mode = mode; | |
d2c12719 | 345 | if ((*oplock & CIFS_CREATE_ACTION) && |
c3b2a0c6 SF |
346 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { |
347 | newinode->i_uid = current_fsuid(); | |
348 | if (inode->i_mode & S_ISGID) | |
349 | newinode->i_gid = inode->i_gid; | |
350 | else | |
351 | newinode->i_gid = current_fsgid(); | |
6473a559 | 352 | } |
1da177e4 | 353 | } |
c3b2a0c6 | 354 | } |
1da177e4 | 355 | |
c3b2a0c6 | 356 | cifs_create_set_dentry: |
d2c12719 | 357 | if (rc != 0) { |
b6b38f70 | 358 | cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
d2c12719 MS |
359 | goto out; |
360 | } | |
361 | d_drop(direntry); | |
362 | d_add(direntry, newinode); | |
c3b2a0c6 | 363 | |
d2c12719 MS |
364 | /* ENOENT for create? How weird... */ |
365 | rc = -ENOENT; | |
366 | if (!newinode) { | |
367 | CIFSSMBClose(xid, tcon, *fileHandle); | |
368 | goto out; | |
369 | } | |
370 | rc = 0; | |
6ca9f3ba | 371 | |
d2c12719 MS |
372 | out: |
373 | kfree(buf); | |
374 | kfree(full_path); | |
375 | return rc; | |
376 | } | |
6ca9f3ba | 377 | |
d9585277 | 378 | int |
d2c12719 | 379 | cifs_atomic_open(struct inode *inode, struct dentry *direntry, |
30d90494 | 380 | struct file *file, unsigned oflags, umode_t mode, |
47237687 | 381 | int *opened) |
d2c12719 MS |
382 | { |
383 | int rc; | |
6d5786a3 | 384 | unsigned int xid; |
d2c12719 MS |
385 | struct tcon_link *tlink; |
386 | struct cifs_tcon *tcon; | |
387 | __u16 fileHandle; | |
388 | __u32 oplock; | |
d2c12719 MS |
389 | struct cifsFileInfo *pfile_info; |
390 | ||
391 | /* Posix open is only called (at lookup time) for file create now. For | |
392 | * opens (rather than creates), because we do not know if it is a file | |
393 | * or directory yet, and current Samba no longer allows us to do posix | |
394 | * open on dirs, we could end up wasting an open call on what turns out | |
395 | * to be a dir. For file opens, we wait to call posix open till | |
396 | * cifs_open. It could be added to atomic_open in the future but the | |
397 | * performance tradeoff of the extra network request when EISDIR or | |
398 | * EACCES is returned would have to be weighed against the 50% reduction | |
399 | * in network traffic in the other paths. | |
400 | */ | |
401 | if (!(oflags & O_CREAT)) { | |
00cd8dd3 | 402 | struct dentry *res = cifs_lookup(inode, direntry, 0); |
d2c12719 | 403 | if (IS_ERR(res)) |
d9585277 | 404 | return PTR_ERR(res); |
d2c12719 | 405 | |
e45198a6 | 406 | return finish_no_open(file, res); |
d2c12719 MS |
407 | } |
408 | ||
409 | rc = check_name(direntry); | |
410 | if (rc) | |
d9585277 | 411 | return rc; |
d2c12719 | 412 | |
6d5786a3 | 413 | xid = get_xid(); |
d2c12719 MS |
414 | |
415 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", | |
416 | inode, direntry->d_name.name, direntry); | |
417 | ||
418 | tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb)); | |
d2c12719 | 419 | if (IS_ERR(tlink)) |
6d5786a3 | 420 | goto out_free_xid; |
d2c12719 MS |
421 | |
422 | tcon = tlink_tcon(tlink); | |
423 | ||
424 | rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, | |
47237687 | 425 | &oplock, &fileHandle, opened); |
d2c12719 | 426 | |
d9585277 | 427 | if (rc) |
d2c12719 | 428 | goto out; |
d2c12719 | 429 | |
30d90494 AV |
430 | rc = finish_open(file, direntry, generic_file_open, opened); |
431 | if (rc) { | |
2422f676 | 432 | CIFSSMBClose(xid, tcon, fileHandle); |
d2c12719 | 433 | goto out; |
5fdae1f6 | 434 | } |
2422f676 | 435 | |
4b124100 | 436 | pfile_info = cifs_new_fileinfo(fileHandle, file, tlink, oplock); |
d2c12719 MS |
437 | if (pfile_info == NULL) { |
438 | CIFSSMBClose(xid, tcon, fileHandle); | |
d9585277 | 439 | rc = -ENOMEM; |
d2c12719 MS |
440 | } |
441 | ||
442 | out: | |
443 | cifs_put_tlink(tlink); | |
6d5786a3 PS |
444 | out_free_xid: |
445 | free_xid(xid); | |
d9585277 | 446 | return rc; |
d2c12719 MS |
447 | } |
448 | ||
449 | int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode, | |
ebfc3b49 | 450 | bool excl) |
d2c12719 MS |
451 | { |
452 | int rc; | |
6d5786a3 | 453 | unsigned int xid = get_xid(); |
d2c12719 MS |
454 | /* |
455 | * BB below access is probably too much for mknod to request | |
456 | * but we have to do query and setpathinfo so requesting | |
457 | * less could fail (unless we want to request getatr and setatr | |
458 | * permissions (only). At least for POSIX we do not have to | |
459 | * request so much. | |
460 | */ | |
461 | unsigned oflags = O_EXCL | O_CREAT | O_RDWR; | |
462 | struct tcon_link *tlink; | |
463 | __u16 fileHandle; | |
464 | __u32 oplock; | |
47237687 | 465 | int created = FILE_CREATED; |
d2c12719 MS |
466 | |
467 | cFYI(1, "cifs_create parent inode = 0x%p name is: %s and dentry = 0x%p", | |
468 | inode, direntry->d_name.name, direntry); | |
469 | ||
470 | tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb)); | |
471 | rc = PTR_ERR(tlink); | |
472 | if (IS_ERR(tlink)) | |
6d5786a3 | 473 | goto out_free_xid; |
d2c12719 MS |
474 | |
475 | rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, | |
476 | &oplock, &fileHandle, &created); | |
477 | if (!rc) | |
478 | CIFSSMBClose(xid, tlink_tcon(tlink), fileHandle); | |
479 | ||
7ffec372 | 480 | cifs_put_tlink(tlink); |
6d5786a3 PS |
481 | out_free_xid: |
482 | free_xid(xid); | |
1da177e4 LT |
483 | return rc; |
484 | } | |
485 | ||
1a67aafb | 486 | int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode, |
5fdae1f6 | 487 | dev_t device_number) |
1da177e4 LT |
488 | { |
489 | int rc = -EPERM; | |
6d5786a3 | 490 | unsigned int xid; |
3d3ea8e6 | 491 | int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL; |
1da177e4 | 492 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 493 | struct tcon_link *tlink; |
96daf2b0 | 494 | struct cifs_tcon *pTcon; |
fa2989f4 | 495 | struct cifs_io_parms io_parms; |
1da177e4 | 496 | char *full_path = NULL; |
fb8c4b14 | 497 | struct inode *newinode = NULL; |
5d9ac7fd JL |
498 | int oplock = 0; |
499 | u16 fileHandle; | |
500 | FILE_ALL_INFO *buf = NULL; | |
501 | unsigned int bytes_written; | |
502 | struct win_dev *pdev; | |
1da177e4 LT |
503 | |
504 | if (!old_valid_dev(device_number)) | |
505 | return -EINVAL; | |
506 | ||
1da177e4 | 507 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
508 | tlink = cifs_sb_tlink(cifs_sb); |
509 | if (IS_ERR(tlink)) | |
510 | return PTR_ERR(tlink); | |
511 | ||
512 | pTcon = tlink_tcon(tlink); | |
513 | ||
6d5786a3 | 514 | xid = get_xid(); |
1da177e4 | 515 | |
1da177e4 | 516 | full_path = build_path_from_dentry(direntry); |
5d9ac7fd | 517 | if (full_path == NULL) { |
1da177e4 | 518 | rc = -ENOMEM; |
5d9ac7fd JL |
519 | goto mknod_out; |
520 | } | |
521 | ||
522 | if (pTcon->unix_ext) { | |
4e1e7fb9 | 523 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 524 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
525 | .ctime = NO_CHANGE_64, |
526 | .atime = NO_CHANGE_64, | |
527 | .mtime = NO_CHANGE_64, | |
528 | .device = device_number, | |
529 | }; | |
5fdae1f6 | 530 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
531 | args.uid = (__u64) current_fsuid(); |
532 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 533 | } else { |
4e1e7fb9 JL |
534 | args.uid = NO_CHANGE_64; |
535 | args.gid = NO_CHANGE_64; | |
1da177e4 | 536 | } |
01ea95e3 JL |
537 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
538 | cifs_sb->local_nls, | |
539 | cifs_sb->mnt_cifs_flags & | |
540 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5d9ac7fd JL |
541 | if (rc) |
542 | goto mknod_out; | |
1da177e4 | 543 | |
5d9ac7fd | 544 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 545 | inode->i_sb, xid); |
eda3c029 | 546 | |
5d9ac7fd JL |
547 | if (rc == 0) |
548 | d_instantiate(direntry, newinode); | |
549 | goto mknod_out; | |
1da177e4 LT |
550 | } |
551 | ||
5d9ac7fd JL |
552 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) |
553 | goto mknod_out; | |
554 | ||
555 | ||
556 | cFYI(1, "sfu compat create special file"); | |
557 | ||
558 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
559 | if (buf == NULL) { | |
560 | kfree(full_path); | |
561 | rc = -ENOMEM; | |
6d5786a3 | 562 | free_xid(xid); |
5d9ac7fd JL |
563 | return rc; |
564 | } | |
565 | ||
3d3ea8e6 SP |
566 | if (backup_cred(cifs_sb)) |
567 | create_options |= CREATE_OPEN_BACKUP_INTENT; | |
568 | ||
5d9ac7fd | 569 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, |
3d3ea8e6 | 570 | GENERIC_WRITE, create_options, |
5d9ac7fd JL |
571 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
572 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
573 | if (rc) | |
574 | goto mknod_out; | |
575 | ||
576 | /* BB Do not bother to decode buf since no local inode yet to put | |
577 | * timestamps in, but we can reuse it safely */ | |
578 | ||
579 | pdev = (struct win_dev *)buf; | |
fa2989f4 PS |
580 | io_parms.netfid = fileHandle; |
581 | io_parms.pid = current->tgid; | |
582 | io_parms.tcon = pTcon; | |
583 | io_parms.offset = 0; | |
584 | io_parms.length = sizeof(struct win_dev); | |
5d9ac7fd JL |
585 | if (S_ISCHR(mode)) { |
586 | memcpy(pdev->type, "IntxCHR", 8); | |
587 | pdev->major = | |
588 | cpu_to_le64(MAJOR(device_number)); | |
589 | pdev->minor = | |
590 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
591 | rc = CIFSSMBWrite(xid, &io_parms, |
592 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
593 | NULL, 0); |
594 | } else if (S_ISBLK(mode)) { | |
595 | memcpy(pdev->type, "IntxBLK", 8); | |
596 | pdev->major = | |
597 | cpu_to_le64(MAJOR(device_number)); | |
598 | pdev->minor = | |
599 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
600 | rc = CIFSSMBWrite(xid, &io_parms, |
601 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
602 | NULL, 0); |
603 | } /* else if (S_ISFIFO) */ | |
604 | CIFSSMBClose(xid, pTcon, fileHandle); | |
605 | d_drop(direntry); | |
606 | ||
607 | /* FIXME: add code here to set EAs */ | |
608 | ||
609 | mknod_out: | |
d14537f1 | 610 | kfree(full_path); |
5d9ac7fd | 611 | kfree(buf); |
6d5786a3 | 612 | free_xid(xid); |
7ffec372 | 613 | cifs_put_tlink(tlink); |
1da177e4 LT |
614 | return rc; |
615 | } | |
616 | ||
1da177e4 | 617 | struct dentry * |
5fdae1f6 | 618 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
00cd8dd3 | 619 | unsigned int flags) |
1da177e4 | 620 | { |
6d5786a3 | 621 | unsigned int xid; |
1da177e4 LT |
622 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ |
623 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 624 | struct tcon_link *tlink; |
96daf2b0 | 625 | struct cifs_tcon *pTcon; |
1da177e4 LT |
626 | struct inode *newInode = NULL; |
627 | char *full_path = NULL; | |
628 | ||
6d5786a3 | 629 | xid = get_xid(); |
1da177e4 | 630 | |
b6b38f70 JP |
631 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", |
632 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 633 | |
1da177e4 LT |
634 | /* check whether path exists */ |
635 | ||
636 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
7ffec372 JL |
637 | tlink = cifs_sb_tlink(cifs_sb); |
638 | if (IS_ERR(tlink)) { | |
6d5786a3 | 639 | free_xid(xid); |
7ffec372 JL |
640 | return (struct dentry *)tlink; |
641 | } | |
642 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 643 | |
d2c12719 MS |
644 | rc = check_name(direntry); |
645 | if (rc) | |
7ffec372 | 646 | goto lookup_out; |
5ddf1e0f | 647 | |
1da177e4 LT |
648 | /* can not grab the rename sem here since it would |
649 | deadlock in the cases (beginning of sys_rename itself) | |
650 | in which we already have the sb rename sem */ | |
651 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 652 | if (full_path == NULL) { |
7ffec372 JL |
653 | rc = -ENOMEM; |
654 | goto lookup_out; | |
1da177e4 LT |
655 | } |
656 | ||
657 | if (direntry->d_inode != NULL) { | |
b6b38f70 | 658 | cFYI(1, "non-NULL inode in lookup"); |
1da177e4 | 659 | } else { |
b6b38f70 | 660 | cFYI(1, "NULL inode in lookup"); |
1da177e4 | 661 | } |
b6b38f70 | 662 | cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); |
1da177e4 | 663 | |
a6ce4932 | 664 | if (pTcon->unix_ext) { |
d2c12719 MS |
665 | rc = cifs_get_inode_info_unix(&newInode, full_path, |
666 | parent_dir_inode->i_sb, xid); | |
667 | } else { | |
1da177e4 | 668 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 669 | parent_dir_inode->i_sb, xid, NULL); |
d2c12719 | 670 | } |
1da177e4 LT |
671 | |
672 | if ((rc == 0) && (newInode != NULL)) { | |
1da177e4 | 673 | d_add(direntry, newInode); |
5fdae1f6 | 674 | /* since paths are not looked up by component - the parent |
3abb9272 | 675 | directories are presumed to be good here */ |
1da177e4 LT |
676 | renew_parental_timestamps(direntry); |
677 | ||
678 | } else if (rc == -ENOENT) { | |
679 | rc = 0; | |
3abb9272 | 680 | direntry->d_time = jiffies; |
1da177e4 | 681 | d_add(direntry, NULL); |
5fdae1f6 SF |
682 | /* if it was once a directory (but how can we tell?) we could do |
683 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 684 | } else if (rc != -EACCES) { |
b6b38f70 | 685 | cERROR(1, "Unexpected lookup error %d", rc); |
ed2b9170 SF |
686 | /* We special case check for Access Denied - since that |
687 | is a common return code */ | |
1da177e4 LT |
688 | } |
689 | ||
2422f676 | 690 | lookup_out: |
d14537f1 | 691 | kfree(full_path); |
7ffec372 | 692 | cifs_put_tlink(tlink); |
6d5786a3 | 693 | free_xid(xid); |
1da177e4 LT |
694 | return ERR_PTR(rc); |
695 | } | |
696 | ||
1da177e4 | 697 | static int |
0b728e19 | 698 | cifs_d_revalidate(struct dentry *direntry, unsigned int flags) |
1da177e4 | 699 | { |
0b728e19 | 700 | if (flags & LOOKUP_RCU) |
34286d66 NP |
701 | return -ECHILD; |
702 | ||
1da177e4 | 703 | if (direntry->d_inode) { |
df2cf170 | 704 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 705 | return 0; |
ad4778fb GF |
706 | else { |
707 | /* | |
936ad909 IK |
708 | * If the inode wasn't known to be a dfs entry when |
709 | * the dentry was instantiated, such as when created | |
710 | * via ->readdir(), it needs to be set now since the | |
711 | * attributes will have been updated by | |
712 | * cifs_revalidate_dentry(). | |
ad4778fb | 713 | */ |
936ad909 IK |
714 | if (IS_AUTOMOUNT(direntry->d_inode) && |
715 | !(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) { | |
716 | spin_lock(&direntry->d_lock); | |
717 | direntry->d_flags |= DCACHE_NEED_AUTOMOUNT; | |
718 | spin_unlock(&direntry->d_lock); | |
719 | } | |
720 | ||
262f86ad | 721 | return 1; |
ad4778fb | 722 | } |
1da177e4 LT |
723 | } |
724 | ||
262f86ad NP |
725 | /* |
726 | * This may be nfsd (or something), anyway, we can't see the | |
727 | * intent of this. So, since this can be for creation, drop it. | |
728 | */ | |
0b728e19 | 729 | if (!flags) |
262f86ad NP |
730 | return 0; |
731 | ||
732 | /* | |
733 | * Drop the negative dentry, in order to make sure to use the | |
734 | * case sensitive name which is specified by user if this is | |
735 | * for creation. | |
736 | */ | |
0b728e19 | 737 | if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) |
407938e7 | 738 | return 0; |
262f86ad NP |
739 | |
740 | if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) | |
741 | return 0; | |
742 | ||
743 | return 1; | |
1da177e4 LT |
744 | } |
745 | ||
746 | /* static int cifs_d_delete(struct dentry *direntry) | |
747 | { | |
748 | int rc = 0; | |
749 | ||
b6b38f70 | 750 | cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
1da177e4 LT |
751 | |
752 | return rc; | |
753 | } */ | |
754 | ||
4fd03e84 | 755 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 756 | .d_revalidate = cifs_d_revalidate, |
01c64fea | 757 | .d_automount = cifs_dfs_d_automount, |
5fdae1f6 | 758 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 759 | }; |
b92327fe | 760 | |
b1e6a015 NP |
761 | static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, |
762 | struct qstr *q) | |
b92327fe | 763 | { |
b1e6a015 | 764 | struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; |
b92327fe SF |
765 | unsigned long hash; |
766 | int i; | |
767 | ||
768 | hash = init_name_hash(); | |
769 | for (i = 0; i < q->len; i++) | |
770 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
771 | hash); | |
772 | q->hash = end_name_hash(hash); | |
773 | ||
774 | return 0; | |
775 | } | |
776 | ||
621e155a NP |
777 | static int cifs_ci_compare(const struct dentry *parent, |
778 | const struct inode *pinode, | |
779 | const struct dentry *dentry, const struct inode *inode, | |
780 | unsigned int len, const char *str, const struct qstr *name) | |
b92327fe | 781 | { |
621e155a | 782 | struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; |
b92327fe | 783 | |
621e155a NP |
784 | if ((name->len == len) && |
785 | (nls_strnicmp(codepage, name->name, str, len) == 0)) | |
b92327fe | 786 | return 0; |
b92327fe SF |
787 | return 1; |
788 | } | |
789 | ||
4fd03e84 | 790 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
791 | .d_revalidate = cifs_d_revalidate, |
792 | .d_hash = cifs_ci_hash, | |
793 | .d_compare = cifs_ci_compare, | |
01c64fea | 794 | .d_automount = cifs_dfs_d_automount, |
b92327fe | 795 | }; |