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 | ||
6d3ea7e4 SF |
47 | char * |
48 | cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, | |
49 | struct cifs_tcon *tcon) | |
50 | { | |
51 | int pplen = vol->prepath ? strlen(vol->prepath) : 0; | |
52 | int dfsplen; | |
53 | char *full_path = NULL; | |
54 | ||
55 | /* if no prefix path, simply set path to the root of share to "" */ | |
56 | if (pplen == 0) { | |
57 | full_path = kzalloc(1, GFP_KERNEL); | |
58 | return full_path; | |
59 | } | |
60 | ||
61 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) | |
62 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
63 | else | |
64 | dfsplen = 0; | |
65 | ||
66 | full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); | |
67 | if (full_path == NULL) | |
68 | return full_path; | |
69 | ||
70 | if (dfsplen) | |
71 | strncpy(full_path, tcon->treeName, dfsplen); | |
72 | strncpy(full_path + dfsplen, vol->prepath, pplen); | |
73 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); | |
74 | full_path[dfsplen + pplen] = 0; /* add trailing null */ | |
75 | return full_path; | |
76 | } | |
77 | ||
1da177e4 LT |
78 | /* Note: caller must free return buffer */ |
79 | char * | |
80 | build_path_from_dentry(struct dentry *direntry) | |
81 | { | |
82 | struct dentry *temp; | |
2fe87f02 | 83 | int namelen; |
646dd539 | 84 | int dfsplen; |
1da177e4 | 85 | char *full_path; |
88274815 | 86 | char dirsep; |
0d424ad0 | 87 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 88 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
dc137bf5 | 89 | unsigned seq; |
1da177e4 | 90 | |
646dd539 | 91 | dirsep = CIFS_DIR_SEP(cifs_sb); |
0d424ad0 JL |
92 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
93 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
646dd539 SF |
94 | else |
95 | dfsplen = 0; | |
1da177e4 | 96 | cifs_bp_rename_retry: |
f87d39d9 | 97 | namelen = dfsplen; |
dc137bf5 AV |
98 | seq = read_seqbegin(&rename_lock); |
99 | rcu_read_lock(); | |
1da177e4 LT |
100 | for (temp = direntry; !IS_ROOT(temp);) { |
101 | namelen += (1 + temp->d_name.len); | |
102 | temp = temp->d_parent; | |
5fdae1f6 | 103 | if (temp == NULL) { |
b6b38f70 | 104 | cERROR(1, "corrupt dentry"); |
dc137bf5 | 105 | rcu_read_unlock(); |
1da177e4 LT |
106 | return NULL; |
107 | } | |
108 | } | |
dc137bf5 | 109 | rcu_read_unlock(); |
1da177e4 LT |
110 | |
111 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 112 | if (full_path == NULL) |
1da177e4 LT |
113 | return full_path; |
114 | full_path[namelen] = 0; /* trailing null */ | |
dc137bf5 | 115 | rcu_read_lock(); |
1da177e4 | 116 | for (temp = direntry; !IS_ROOT(temp);) { |
dc137bf5 | 117 | spin_lock(&temp->d_lock); |
1da177e4 LT |
118 | namelen -= 1 + temp->d_name.len; |
119 | if (namelen < 0) { | |
dc137bf5 | 120 | spin_unlock(&temp->d_lock); |
1da177e4 LT |
121 | break; |
122 | } else { | |
7f57356b | 123 | full_path[namelen] = dirsep; |
1da177e4 LT |
124 | strncpy(full_path + namelen + 1, temp->d_name.name, |
125 | temp->d_name.len); | |
b6b38f70 | 126 | cFYI(0, "name: %s", full_path + namelen); |
1da177e4 | 127 | } |
dc137bf5 | 128 | spin_unlock(&temp->d_lock); |
1da177e4 | 129 | temp = temp->d_parent; |
5fdae1f6 | 130 | if (temp == NULL) { |
b6b38f70 | 131 | cERROR(1, "corrupt dentry"); |
dc137bf5 | 132 | rcu_read_unlock(); |
1da177e4 LT |
133 | kfree(full_path); |
134 | return NULL; | |
135 | } | |
136 | } | |
dc137bf5 AV |
137 | rcu_read_unlock(); |
138 | if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) { | |
fa71f447 JL |
139 | cFYI(1, "did not end path lookup where expected. namelen=%d " |
140 | "dfsplen=%d", namelen, dfsplen); | |
5fdae1f6 | 141 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
142 | of one of the parent directories (we can not lock the dentries |
143 | above us to prevent this, but retrying should be harmless) */ | |
144 | kfree(full_path); | |
1da177e4 LT |
145 | goto cifs_bp_rename_retry; |
146 | } | |
2fe87f02 SF |
147 | /* DIR_SEP already set for byte 0 / vs \ but not for |
148 | subsequent slashes in prepath which currently must | |
149 | be entered the right way - not sure if there is an alternative | |
150 | since the '\' is a valid posix character so we can not switch | |
151 | those safely to '/' if any are found in the middle of the prepath */ | |
152 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
646dd539 SF |
153 | |
154 | if (dfsplen) { | |
0d424ad0 | 155 | strncpy(full_path, tcon->treeName, dfsplen); |
646dd539 SF |
156 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
157 | int i; | |
158 | for (i = 0; i < dfsplen; i++) { | |
159 | if (full_path[i] == '\\') | |
160 | full_path[i] = '/'; | |
161 | } | |
162 | } | |
163 | } | |
1da177e4 LT |
164 | return full_path; |
165 | } | |
166 | ||
d2c12719 MS |
167 | /* |
168 | * Don't allow the separator character in a path component. | |
169 | * The VFS will not allow "/", but "\" is allowed by posix. | |
170 | */ | |
171 | static int | |
172 | check_name(struct dentry *direntry) | |
173 | { | |
174 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); | |
175 | int i; | |
176 | ||
177 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
178 | for (i = 0; i < direntry->d_name.len; i++) { | |
179 | if (direntry->d_name.name[i] == '\\') { | |
180 | cFYI(1, "Invalid file name"); | |
181 | return -EINVAL; | |
182 | } | |
183 | } | |
184 | } | |
185 | return 0; | |
186 | } | |
187 | ||
188 | ||
3979877e | 189 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 | 190 | |
6d5786a3 PS |
191 | static int |
192 | cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, | |
193 | struct tcon_link *tlink, unsigned oflags, umode_t mode, | |
25364138 | 194 | __u32 *oplock, struct cifs_fid *fid, int *created) |
1da177e4 LT |
195 | { |
196 | int rc = -ENOENT; | |
67750fb9 | 197 | int create_options = CREATE_NOT_DIR; |
25364138 | 198 | int desired_access; |
d2c12719 MS |
199 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
200 | struct cifs_tcon *tcon = tlink_tcon(tlink); | |
1da177e4 | 201 | char *full_path = NULL; |
fb8c4b14 | 202 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 203 | struct inode *newinode = NULL; |
d2c12719 | 204 | int disposition; |
25364138 | 205 | struct TCP_Server_Info *server = tcon->ses->server; |
1da177e4 | 206 | |
d2c12719 | 207 | *oplock = 0; |
10b9b98e | 208 | if (tcon->ses->server->oplocks) |
d2c12719 | 209 | *oplock = REQ_OPLOCK; |
c3b2a0c6 | 210 | |
7ffec372 JL |
211 | full_path = build_path_from_dentry(direntry); |
212 | if (full_path == NULL) { | |
213 | rc = -ENOMEM; | |
d2c12719 | 214 | goto out; |
7ffec372 JL |
215 | } |
216 | ||
29e20f9c | 217 | if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open && |
c3b2a0c6 SF |
218 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
219 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
25364138 PS |
220 | rc = cifs_posix_open(full_path, &newinode, inode->i_sb, mode, |
221 | oflags, oplock, &fid->netfid, xid); | |
d2c12719 MS |
222 | switch (rc) { |
223 | case 0: | |
224 | if (newinode == NULL) { | |
225 | /* query inode info */ | |
90e4ee5d | 226 | goto cifs_create_get_file_info; |
d2c12719 MS |
227 | } |
228 | ||
229 | if (!S_ISREG(newinode->i_mode)) { | |
230 | /* | |
231 | * The server may allow us to open things like | |
232 | * FIFOs, but the client isn't set up to deal | |
233 | * with that. If it's not a regular file, just | |
234 | * close it and proceed as if it were a normal | |
235 | * lookup. | |
236 | */ | |
25364138 | 237 | CIFSSMBClose(xid, tcon, fid->netfid); |
d2c12719 MS |
238 | goto cifs_create_get_file_info; |
239 | } | |
240 | /* success, no need to query */ | |
241 | goto cifs_create_set_dentry; | |
242 | ||
243 | case -ENOENT: | |
244 | goto cifs_create_get_file_info; | |
245 | ||
246 | case -EIO: | |
247 | case -EINVAL: | |
248 | /* | |
249 | * EIO could indicate that (posix open) operation is not | |
250 | * supported, despite what server claimed in capability | |
251 | * negotiation. | |
252 | * | |
253 | * POSIX open in samba versions 3.3.1 and earlier could | |
254 | * incorrectly fail with invalid parameter. | |
255 | */ | |
256 | tcon->broken_posix_open = true; | |
257 | break; | |
258 | ||
259 | case -EREMOTE: | |
260 | case -EOPNOTSUPP: | |
261 | /* | |
262 | * EREMOTE indicates DFS junction, which is not handled | |
263 | * in posix open. If either that or op not supported | |
264 | * returned, follow the normal lookup. | |
265 | */ | |
266 | break; | |
e08fc045 | 267 | |
d2c12719 MS |
268 | default: |
269 | goto out; | |
270 | } | |
271 | /* | |
272 | * fallthrough to retry, using older open call, this is case | |
273 | * where server does not support this SMB level, and falsely | |
274 | * claims capability (also get here for DFS case which should be | |
275 | * rare for path not covered on files) | |
276 | */ | |
1da177e4 LT |
277 | } |
278 | ||
25364138 | 279 | desired_access = 0; |
d2c12719 | 280 | if (OPEN_FMODE(oflags) & FMODE_READ) |
25364138 | 281 | desired_access |= GENERIC_READ; /* is this too little? */ |
d2c12719 | 282 | if (OPEN_FMODE(oflags) & FMODE_WRITE) |
25364138 | 283 | desired_access |= GENERIC_WRITE; |
d2c12719 MS |
284 | |
285 | disposition = FILE_OVERWRITE_IF; | |
286 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) | |
287 | disposition = FILE_CREATE; | |
288 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) | |
289 | disposition = FILE_OVERWRITE_IF; | |
290 | else if ((oflags & O_CREAT) == O_CREAT) | |
291 | disposition = FILE_OPEN_IF; | |
292 | else | |
293 | cFYI(1, "Create flag not set in create function"); | |
294 | ||
25364138 PS |
295 | /* |
296 | * BB add processing to set equivalent of mode - e.g. via CreateX with | |
297 | * ACLs | |
298 | */ | |
299 | ||
300 | if (!server->ops->open) { | |
301 | rc = -ENOSYS; | |
302 | goto out; | |
303 | } | |
1da177e4 | 304 | |
5fdae1f6 SF |
305 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
306 | if (buf == NULL) { | |
232341ba | 307 | rc = -ENOMEM; |
d2c12719 | 308 | goto out; |
1da177e4 | 309 | } |
67750fb9 | 310 | |
67750fb9 JL |
311 | /* |
312 | * if we're not using unix extensions, see if we need to set | |
313 | * ATTR_READONLY on the create call | |
314 | */ | |
f818dd55 | 315 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
316 | create_options |= CREATE_OPTION_READONLY; |
317 | ||
3d3ea8e6 SP |
318 | if (backup_cred(cifs_sb)) |
319 | create_options |= CREATE_OPEN_BACKUP_INTENT; | |
320 | ||
25364138 PS |
321 | rc = server->ops->open(xid, tcon, full_path, disposition, |
322 | desired_access, create_options, fid, oplock, | |
323 | buf, cifs_sb); | |
1da177e4 | 324 | if (rc) { |
b6b38f70 | 325 | cFYI(1, "cifs_create returned 0x%x", rc); |
d2c12719 | 326 | goto out; |
c3b2a0c6 SF |
327 | } |
328 | ||
25364138 PS |
329 | /* |
330 | * If Open reported that we actually created a file then we now have to | |
331 | * set the mode if possible. | |
332 | */ | |
d2c12719 | 333 | if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) { |
c3b2a0c6 | 334 | struct cifs_unix_set_info_args args = { |
4e1e7fb9 JL |
335 | .mode = mode, |
336 | .ctime = NO_CHANGE_64, | |
337 | .atime = NO_CHANGE_64, | |
338 | .mtime = NO_CHANGE_64, | |
339 | .device = 0, | |
c3b2a0c6 SF |
340 | }; |
341 | ||
47237687 | 342 | *created |= FILE_CREATED; |
c3b2a0c6 SF |
343 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
344 | args.uid = (__u64) current_fsuid(); | |
345 | if (inode->i_mode & S_ISGID) | |
346 | args.gid = (__u64) inode->i_gid; | |
347 | else | |
348 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 349 | } else { |
c3b2a0c6 SF |
350 | args.uid = NO_CHANGE_64; |
351 | args.gid = NO_CHANGE_64; | |
1da177e4 | 352 | } |
25364138 PS |
353 | CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid->netfid, |
354 | current->tgid); | |
c3b2a0c6 | 355 | } else { |
25364138 PS |
356 | /* |
357 | * BB implement mode setting via Windows security | |
358 | * descriptors e.g. | |
359 | */ | |
c3b2a0c6 SF |
360 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ |
361 | ||
362 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
363 | } | |
1da177e4 | 364 | |
c3b2a0c6 SF |
365 | cifs_create_get_file_info: |
366 | /* server might mask mode so we have to query for it */ | |
367 | if (tcon->unix_ext) | |
25364138 PS |
368 | rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb, |
369 | xid); | |
c3b2a0c6 | 370 | else { |
25364138 PS |
371 | rc = cifs_get_inode_info(&newinode, full_path, buf, inode->i_sb, |
372 | xid, &fid->netfid); | |
c3b2a0c6 | 373 | if (newinode) { |
b8c32dbb PS |
374 | if (server->ops->set_lease_key) |
375 | server->ops->set_lease_key(newinode, fid); | |
c3b2a0c6 SF |
376 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
377 | newinode->i_mode = mode; | |
d2c12719 | 378 | if ((*oplock & CIFS_CREATE_ACTION) && |
c3b2a0c6 SF |
379 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { |
380 | newinode->i_uid = current_fsuid(); | |
381 | if (inode->i_mode & S_ISGID) | |
382 | newinode->i_gid = inode->i_gid; | |
383 | else | |
384 | newinode->i_gid = current_fsgid(); | |
6473a559 | 385 | } |
1da177e4 | 386 | } |
c3b2a0c6 | 387 | } |
1da177e4 | 388 | |
c3b2a0c6 | 389 | cifs_create_set_dentry: |
d2c12719 | 390 | if (rc != 0) { |
b6b38f70 | 391 | cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
25364138 PS |
392 | if (server->ops->close) |
393 | server->ops->close(xid, tcon, fid); | |
d2c12719 MS |
394 | goto out; |
395 | } | |
396 | d_drop(direntry); | |
397 | d_add(direntry, newinode); | |
c3b2a0c6 | 398 | |
d2c12719 MS |
399 | out: |
400 | kfree(buf); | |
401 | kfree(full_path); | |
402 | return rc; | |
403 | } | |
6ca9f3ba | 404 | |
d9585277 | 405 | int |
d2c12719 | 406 | cifs_atomic_open(struct inode *inode, struct dentry *direntry, |
30d90494 | 407 | struct file *file, unsigned oflags, umode_t mode, |
47237687 | 408 | int *opened) |
d2c12719 MS |
409 | { |
410 | int rc; | |
6d5786a3 | 411 | unsigned int xid; |
d2c12719 MS |
412 | struct tcon_link *tlink; |
413 | struct cifs_tcon *tcon; | |
25364138 | 414 | struct TCP_Server_Info *server; |
fb1214e4 | 415 | struct cifs_fid fid; |
233839b1 | 416 | struct cifs_pending_open open; |
d2c12719 | 417 | __u32 oplock; |
fb1214e4 | 418 | struct cifsFileInfo *file_info; |
d2c12719 | 419 | |
fb1214e4 PS |
420 | /* |
421 | * Posix open is only called (at lookup time) for file create now. For | |
d2c12719 MS |
422 | * opens (rather than creates), because we do not know if it is a file |
423 | * or directory yet, and current Samba no longer allows us to do posix | |
424 | * open on dirs, we could end up wasting an open call on what turns out | |
425 | * to be a dir. For file opens, we wait to call posix open till | |
426 | * cifs_open. It could be added to atomic_open in the future but the | |
427 | * performance tradeoff of the extra network request when EISDIR or | |
428 | * EACCES is returned would have to be weighed against the 50% reduction | |
429 | * in network traffic in the other paths. | |
430 | */ | |
431 | if (!(oflags & O_CREAT)) { | |
3798f47a SP |
432 | struct dentry *res; |
433 | ||
434 | /* | |
435 | * Check for hashed negative dentry. We have already revalidated | |
436 | * the dentry and it is fine. No need to perform another lookup. | |
437 | */ | |
438 | if (!d_unhashed(direntry)) | |
439 | return -ENOENT; | |
440 | ||
441 | res = cifs_lookup(inode, direntry, 0); | |
d2c12719 | 442 | if (IS_ERR(res)) |
d9585277 | 443 | return PTR_ERR(res); |
d2c12719 | 444 | |
e45198a6 | 445 | return finish_no_open(file, res); |
d2c12719 MS |
446 | } |
447 | ||
448 | rc = check_name(direntry); | |
449 | if (rc) | |
d9585277 | 450 | return rc; |
d2c12719 | 451 | |
6d5786a3 | 452 | xid = get_xid(); |
d2c12719 MS |
453 | |
454 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", | |
455 | inode, direntry->d_name.name, direntry); | |
456 | ||
457 | tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb)); | |
d2c12719 | 458 | if (IS_ERR(tlink)) |
6d5786a3 | 459 | goto out_free_xid; |
d2c12719 MS |
460 | |
461 | tcon = tlink_tcon(tlink); | |
25364138 | 462 | server = tcon->ses->server; |
d2c12719 | 463 | |
b8c32dbb PS |
464 | if (server->ops->new_lease_key) |
465 | server->ops->new_lease_key(&fid); | |
466 | ||
233839b1 PS |
467 | cifs_add_pending_open(&fid, tlink, &open); |
468 | ||
d2c12719 | 469 | rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, |
25364138 | 470 | &oplock, &fid, opened); |
d2c12719 | 471 | |
233839b1 PS |
472 | if (rc) { |
473 | cifs_del_pending_open(&open); | |
d2c12719 | 474 | goto out; |
233839b1 | 475 | } |
d2c12719 | 476 | |
30d90494 AV |
477 | rc = finish_open(file, direntry, generic_file_open, opened); |
478 | if (rc) { | |
25364138 PS |
479 | if (server->ops->close) |
480 | server->ops->close(xid, tcon, &fid); | |
233839b1 | 481 | cifs_del_pending_open(&open); |
d2c12719 | 482 | goto out; |
5fdae1f6 | 483 | } |
2422f676 | 484 | |
fb1214e4 PS |
485 | file_info = cifs_new_fileinfo(&fid, file, tlink, oplock); |
486 | if (file_info == NULL) { | |
25364138 PS |
487 | if (server->ops->close) |
488 | server->ops->close(xid, tcon, &fid); | |
233839b1 | 489 | cifs_del_pending_open(&open); |
d9585277 | 490 | rc = -ENOMEM; |
d2c12719 MS |
491 | } |
492 | ||
493 | out: | |
494 | cifs_put_tlink(tlink); | |
6d5786a3 PS |
495 | out_free_xid: |
496 | free_xid(xid); | |
d9585277 | 497 | return rc; |
d2c12719 MS |
498 | } |
499 | ||
500 | int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode, | |
ebfc3b49 | 501 | bool excl) |
d2c12719 MS |
502 | { |
503 | int rc; | |
6d5786a3 | 504 | unsigned int xid = get_xid(); |
d2c12719 MS |
505 | /* |
506 | * BB below access is probably too much for mknod to request | |
507 | * but we have to do query and setpathinfo so requesting | |
508 | * less could fail (unless we want to request getatr and setatr | |
509 | * permissions (only). At least for POSIX we do not have to | |
510 | * request so much. | |
511 | */ | |
512 | unsigned oflags = O_EXCL | O_CREAT | O_RDWR; | |
513 | struct tcon_link *tlink; | |
25364138 PS |
514 | struct cifs_tcon *tcon; |
515 | struct TCP_Server_Info *server; | |
516 | struct cifs_fid fid; | |
d2c12719 | 517 | __u32 oplock; |
47237687 | 518 | int created = FILE_CREATED; |
d2c12719 MS |
519 | |
520 | cFYI(1, "cifs_create parent inode = 0x%p name is: %s and dentry = 0x%p", | |
521 | inode, direntry->d_name.name, direntry); | |
522 | ||
523 | tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb)); | |
524 | rc = PTR_ERR(tlink); | |
525 | if (IS_ERR(tlink)) | |
6d5786a3 | 526 | goto out_free_xid; |
d2c12719 | 527 | |
25364138 PS |
528 | tcon = tlink_tcon(tlink); |
529 | server = tcon->ses->server; | |
b8c32dbb PS |
530 | |
531 | if (server->ops->new_lease_key) | |
532 | server->ops->new_lease_key(&fid); | |
533 | ||
534 | rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, | |
535 | &oplock, &fid, &created); | |
25364138 PS |
536 | if (!rc && server->ops->close) |
537 | server->ops->close(xid, tcon, &fid); | |
d2c12719 | 538 | |
7ffec372 | 539 | cifs_put_tlink(tlink); |
6d5786a3 PS |
540 | out_free_xid: |
541 | free_xid(xid); | |
1da177e4 LT |
542 | return rc; |
543 | } | |
544 | ||
1a67aafb | 545 | int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode, |
5fdae1f6 | 546 | dev_t device_number) |
1da177e4 LT |
547 | { |
548 | int rc = -EPERM; | |
6d5786a3 | 549 | unsigned int xid; |
3d3ea8e6 | 550 | int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL; |
1da177e4 | 551 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 552 | struct tcon_link *tlink; |
96daf2b0 | 553 | struct cifs_tcon *pTcon; |
fa2989f4 | 554 | struct cifs_io_parms io_parms; |
1da177e4 | 555 | char *full_path = NULL; |
fb8c4b14 | 556 | struct inode *newinode = NULL; |
5d9ac7fd JL |
557 | int oplock = 0; |
558 | u16 fileHandle; | |
559 | FILE_ALL_INFO *buf = NULL; | |
560 | unsigned int bytes_written; | |
561 | struct win_dev *pdev; | |
1da177e4 LT |
562 | |
563 | if (!old_valid_dev(device_number)) | |
564 | return -EINVAL; | |
565 | ||
1da177e4 | 566 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
567 | tlink = cifs_sb_tlink(cifs_sb); |
568 | if (IS_ERR(tlink)) | |
569 | return PTR_ERR(tlink); | |
570 | ||
571 | pTcon = tlink_tcon(tlink); | |
572 | ||
6d5786a3 | 573 | xid = get_xid(); |
1da177e4 | 574 | |
1da177e4 | 575 | full_path = build_path_from_dentry(direntry); |
5d9ac7fd | 576 | if (full_path == NULL) { |
1da177e4 | 577 | rc = -ENOMEM; |
5d9ac7fd JL |
578 | goto mknod_out; |
579 | } | |
580 | ||
581 | if (pTcon->unix_ext) { | |
4e1e7fb9 | 582 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 583 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
584 | .ctime = NO_CHANGE_64, |
585 | .atime = NO_CHANGE_64, | |
586 | .mtime = NO_CHANGE_64, | |
587 | .device = device_number, | |
588 | }; | |
5fdae1f6 | 589 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
590 | args.uid = (__u64) current_fsuid(); |
591 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 592 | } else { |
4e1e7fb9 JL |
593 | args.uid = NO_CHANGE_64; |
594 | args.gid = NO_CHANGE_64; | |
1da177e4 | 595 | } |
01ea95e3 JL |
596 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
597 | cifs_sb->local_nls, | |
598 | cifs_sb->mnt_cifs_flags & | |
599 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5d9ac7fd JL |
600 | if (rc) |
601 | goto mknod_out; | |
1da177e4 | 602 | |
5d9ac7fd | 603 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 604 | inode->i_sb, xid); |
eda3c029 | 605 | |
5d9ac7fd JL |
606 | if (rc == 0) |
607 | d_instantiate(direntry, newinode); | |
608 | goto mknod_out; | |
1da177e4 LT |
609 | } |
610 | ||
5d9ac7fd JL |
611 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) |
612 | goto mknod_out; | |
613 | ||
614 | ||
615 | cFYI(1, "sfu compat create special file"); | |
616 | ||
617 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
618 | if (buf == NULL) { | |
619 | kfree(full_path); | |
620 | rc = -ENOMEM; | |
6d5786a3 | 621 | free_xid(xid); |
5d9ac7fd JL |
622 | return rc; |
623 | } | |
624 | ||
3d3ea8e6 SP |
625 | if (backup_cred(cifs_sb)) |
626 | create_options |= CREATE_OPEN_BACKUP_INTENT; | |
627 | ||
5d9ac7fd | 628 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, |
3d3ea8e6 | 629 | GENERIC_WRITE, create_options, |
5d9ac7fd JL |
630 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
631 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
632 | if (rc) | |
633 | goto mknod_out; | |
634 | ||
635 | /* BB Do not bother to decode buf since no local inode yet to put | |
636 | * timestamps in, but we can reuse it safely */ | |
637 | ||
638 | pdev = (struct win_dev *)buf; | |
fa2989f4 PS |
639 | io_parms.netfid = fileHandle; |
640 | io_parms.pid = current->tgid; | |
641 | io_parms.tcon = pTcon; | |
642 | io_parms.offset = 0; | |
643 | io_parms.length = sizeof(struct win_dev); | |
5d9ac7fd JL |
644 | if (S_ISCHR(mode)) { |
645 | memcpy(pdev->type, "IntxCHR", 8); | |
646 | pdev->major = | |
647 | cpu_to_le64(MAJOR(device_number)); | |
648 | pdev->minor = | |
649 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
650 | rc = CIFSSMBWrite(xid, &io_parms, |
651 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
652 | NULL, 0); |
653 | } else if (S_ISBLK(mode)) { | |
654 | memcpy(pdev->type, "IntxBLK", 8); | |
655 | pdev->major = | |
656 | cpu_to_le64(MAJOR(device_number)); | |
657 | pdev->minor = | |
658 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
659 | rc = CIFSSMBWrite(xid, &io_parms, |
660 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
661 | NULL, 0); |
662 | } /* else if (S_ISFIFO) */ | |
663 | CIFSSMBClose(xid, pTcon, fileHandle); | |
664 | d_drop(direntry); | |
665 | ||
666 | /* FIXME: add code here to set EAs */ | |
667 | ||
668 | mknod_out: | |
d14537f1 | 669 | kfree(full_path); |
5d9ac7fd | 670 | kfree(buf); |
6d5786a3 | 671 | free_xid(xid); |
7ffec372 | 672 | cifs_put_tlink(tlink); |
1da177e4 LT |
673 | return rc; |
674 | } | |
675 | ||
1da177e4 | 676 | struct dentry * |
5fdae1f6 | 677 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
00cd8dd3 | 678 | unsigned int flags) |
1da177e4 | 679 | { |
6d5786a3 | 680 | unsigned int xid; |
1da177e4 LT |
681 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ |
682 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 683 | struct tcon_link *tlink; |
96daf2b0 | 684 | struct cifs_tcon *pTcon; |
1da177e4 LT |
685 | struct inode *newInode = NULL; |
686 | char *full_path = NULL; | |
687 | ||
6d5786a3 | 688 | xid = get_xid(); |
1da177e4 | 689 | |
b6b38f70 JP |
690 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", |
691 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 692 | |
1da177e4 LT |
693 | /* check whether path exists */ |
694 | ||
695 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
7ffec372 JL |
696 | tlink = cifs_sb_tlink(cifs_sb); |
697 | if (IS_ERR(tlink)) { | |
6d5786a3 | 698 | free_xid(xid); |
7ffec372 JL |
699 | return (struct dentry *)tlink; |
700 | } | |
701 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 702 | |
d2c12719 MS |
703 | rc = check_name(direntry); |
704 | if (rc) | |
7ffec372 | 705 | goto lookup_out; |
5ddf1e0f | 706 | |
1da177e4 LT |
707 | /* can not grab the rename sem here since it would |
708 | deadlock in the cases (beginning of sys_rename itself) | |
709 | in which we already have the sb rename sem */ | |
710 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 711 | if (full_path == NULL) { |
7ffec372 JL |
712 | rc = -ENOMEM; |
713 | goto lookup_out; | |
1da177e4 LT |
714 | } |
715 | ||
716 | if (direntry->d_inode != NULL) { | |
b6b38f70 | 717 | cFYI(1, "non-NULL inode in lookup"); |
1da177e4 | 718 | } else { |
b6b38f70 | 719 | cFYI(1, "NULL inode in lookup"); |
1da177e4 | 720 | } |
b6b38f70 | 721 | cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); |
1da177e4 | 722 | |
a6ce4932 | 723 | if (pTcon->unix_ext) { |
d2c12719 MS |
724 | rc = cifs_get_inode_info_unix(&newInode, full_path, |
725 | parent_dir_inode->i_sb, xid); | |
726 | } else { | |
1da177e4 | 727 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 728 | parent_dir_inode->i_sb, xid, NULL); |
d2c12719 | 729 | } |
1da177e4 LT |
730 | |
731 | if ((rc == 0) && (newInode != NULL)) { | |
1da177e4 | 732 | d_add(direntry, newInode); |
5fdae1f6 | 733 | /* since paths are not looked up by component - the parent |
3abb9272 | 734 | directories are presumed to be good here */ |
1da177e4 LT |
735 | renew_parental_timestamps(direntry); |
736 | ||
737 | } else if (rc == -ENOENT) { | |
738 | rc = 0; | |
3abb9272 | 739 | direntry->d_time = jiffies; |
1da177e4 | 740 | d_add(direntry, NULL); |
5fdae1f6 SF |
741 | /* if it was once a directory (but how can we tell?) we could do |
742 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 743 | } else if (rc != -EACCES) { |
b6b38f70 | 744 | cERROR(1, "Unexpected lookup error %d", rc); |
ed2b9170 SF |
745 | /* We special case check for Access Denied - since that |
746 | is a common return code */ | |
1da177e4 LT |
747 | } |
748 | ||
2422f676 | 749 | lookup_out: |
d14537f1 | 750 | kfree(full_path); |
7ffec372 | 751 | cifs_put_tlink(tlink); |
6d5786a3 | 752 | free_xid(xid); |
1da177e4 LT |
753 | return ERR_PTR(rc); |
754 | } | |
755 | ||
1da177e4 | 756 | static int |
0b728e19 | 757 | cifs_d_revalidate(struct dentry *direntry, unsigned int flags) |
1da177e4 | 758 | { |
0b728e19 | 759 | if (flags & LOOKUP_RCU) |
34286d66 NP |
760 | return -ECHILD; |
761 | ||
1da177e4 | 762 | if (direntry->d_inode) { |
df2cf170 | 763 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 764 | return 0; |
ad4778fb GF |
765 | else { |
766 | /* | |
936ad909 IK |
767 | * If the inode wasn't known to be a dfs entry when |
768 | * the dentry was instantiated, such as when created | |
769 | * via ->readdir(), it needs to be set now since the | |
770 | * attributes will have been updated by | |
771 | * cifs_revalidate_dentry(). | |
ad4778fb | 772 | */ |
936ad909 IK |
773 | if (IS_AUTOMOUNT(direntry->d_inode) && |
774 | !(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) { | |
775 | spin_lock(&direntry->d_lock); | |
776 | direntry->d_flags |= DCACHE_NEED_AUTOMOUNT; | |
777 | spin_unlock(&direntry->d_lock); | |
778 | } | |
779 | ||
262f86ad | 780 | return 1; |
ad4778fb | 781 | } |
1da177e4 LT |
782 | } |
783 | ||
262f86ad NP |
784 | /* |
785 | * This may be nfsd (or something), anyway, we can't see the | |
786 | * intent of this. So, since this can be for creation, drop it. | |
787 | */ | |
0b728e19 | 788 | if (!flags) |
262f86ad NP |
789 | return 0; |
790 | ||
791 | /* | |
792 | * Drop the negative dentry, in order to make sure to use the | |
793 | * case sensitive name which is specified by user if this is | |
794 | * for creation. | |
795 | */ | |
0b728e19 | 796 | if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) |
407938e7 | 797 | return 0; |
262f86ad NP |
798 | |
799 | if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) | |
800 | return 0; | |
801 | ||
802 | return 1; | |
1da177e4 LT |
803 | } |
804 | ||
805 | /* static int cifs_d_delete(struct dentry *direntry) | |
806 | { | |
807 | int rc = 0; | |
808 | ||
b6b38f70 | 809 | cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
1da177e4 LT |
810 | |
811 | return rc; | |
812 | } */ | |
813 | ||
4fd03e84 | 814 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 815 | .d_revalidate = cifs_d_revalidate, |
01c64fea | 816 | .d_automount = cifs_dfs_d_automount, |
5fdae1f6 | 817 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 818 | }; |
b92327fe | 819 | |
b1e6a015 NP |
820 | static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, |
821 | struct qstr *q) | |
b92327fe | 822 | { |
b1e6a015 | 823 | struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; |
b92327fe SF |
824 | unsigned long hash; |
825 | int i; | |
826 | ||
827 | hash = init_name_hash(); | |
828 | for (i = 0; i < q->len; i++) | |
829 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
830 | hash); | |
831 | q->hash = end_name_hash(hash); | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
621e155a NP |
836 | static int cifs_ci_compare(const struct dentry *parent, |
837 | const struct inode *pinode, | |
838 | const struct dentry *dentry, const struct inode *inode, | |
839 | unsigned int len, const char *str, const struct qstr *name) | |
b92327fe | 840 | { |
621e155a | 841 | struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; |
b92327fe | 842 | |
621e155a NP |
843 | if ((name->len == len) && |
844 | (nls_strnicmp(codepage, name->name, str, len) == 0)) | |
b92327fe | 845 | return 0; |
b92327fe SF |
846 | return 1; |
847 | } | |
848 | ||
4fd03e84 | 849 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
850 | .d_revalidate = cifs_d_revalidate, |
851 | .d_hash = cifs_ci_hash, | |
852 | .d_compare = cifs_ci_compare, | |
01c64fea | 853 | .d_automount = cifs_dfs_d_automount, |
b92327fe | 854 | }; |