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 | { | |
839db3d1 | 51 | int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; |
6d3ea7e4 SF |
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); | |
839db3d1 JL |
72 | full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb); |
73 | strncpy(full_path + dfsplen + 1, vol->prepath, pplen); | |
6d3ea7e4 SF |
74 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
75 | full_path[dfsplen + pplen] = 0; /* add trailing null */ | |
76 | return full_path; | |
77 | } | |
78 | ||
1da177e4 LT |
79 | /* Note: caller must free return buffer */ |
80 | char * | |
81 | build_path_from_dentry(struct dentry *direntry) | |
82 | { | |
83 | struct dentry *temp; | |
2fe87f02 | 84 | int namelen; |
646dd539 | 85 | int dfsplen; |
1da177e4 | 86 | char *full_path; |
88274815 | 87 | char dirsep; |
0d424ad0 | 88 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 89 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
dc137bf5 | 90 | unsigned seq; |
1da177e4 | 91 | |
646dd539 | 92 | dirsep = CIFS_DIR_SEP(cifs_sb); |
0d424ad0 JL |
93 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
94 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
646dd539 SF |
95 | else |
96 | dfsplen = 0; | |
1da177e4 | 97 | cifs_bp_rename_retry: |
f87d39d9 | 98 | namelen = dfsplen; |
dc137bf5 AV |
99 | seq = read_seqbegin(&rename_lock); |
100 | rcu_read_lock(); | |
1da177e4 LT |
101 | for (temp = direntry; !IS_ROOT(temp);) { |
102 | namelen += (1 + temp->d_name.len); | |
103 | temp = temp->d_parent; | |
5fdae1f6 | 104 | if (temp == NULL) { |
f96637be | 105 | cifs_dbg(VFS, "corrupt dentry\n"); |
dc137bf5 | 106 | rcu_read_unlock(); |
1da177e4 LT |
107 | return NULL; |
108 | } | |
109 | } | |
dc137bf5 | 110 | rcu_read_unlock(); |
1da177e4 LT |
111 | |
112 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 113 | if (full_path == NULL) |
1da177e4 LT |
114 | return full_path; |
115 | full_path[namelen] = 0; /* trailing null */ | |
dc137bf5 | 116 | rcu_read_lock(); |
1da177e4 | 117 | for (temp = direntry; !IS_ROOT(temp);) { |
dc137bf5 | 118 | spin_lock(&temp->d_lock); |
1da177e4 LT |
119 | namelen -= 1 + temp->d_name.len; |
120 | if (namelen < 0) { | |
dc137bf5 | 121 | spin_unlock(&temp->d_lock); |
1da177e4 LT |
122 | break; |
123 | } else { | |
7f57356b | 124 | full_path[namelen] = dirsep; |
1da177e4 LT |
125 | strncpy(full_path + namelen + 1, temp->d_name.name, |
126 | temp->d_name.len); | |
f96637be | 127 | cifs_dbg(FYI, "name: %s\n", full_path + namelen); |
1da177e4 | 128 | } |
dc137bf5 | 129 | spin_unlock(&temp->d_lock); |
1da177e4 | 130 | temp = temp->d_parent; |
5fdae1f6 | 131 | if (temp == NULL) { |
f96637be | 132 | cifs_dbg(VFS, "corrupt dentry\n"); |
dc137bf5 | 133 | rcu_read_unlock(); |
1da177e4 LT |
134 | kfree(full_path); |
135 | return NULL; | |
136 | } | |
137 | } | |
dc137bf5 AV |
138 | rcu_read_unlock(); |
139 | if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) { | |
f96637be JP |
140 | cifs_dbg(FYI, "did not end path lookup where expected. namelen=%ddfsplen=%d\n", |
141 | namelen, dfsplen); | |
5fdae1f6 | 142 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
143 | of one of the parent directories (we can not lock the dentries |
144 | above us to prevent this, but retrying should be harmless) */ | |
145 | kfree(full_path); | |
1da177e4 LT |
146 | goto cifs_bp_rename_retry; |
147 | } | |
2fe87f02 SF |
148 | /* DIR_SEP already set for byte 0 / vs \ but not for |
149 | subsequent slashes in prepath which currently must | |
150 | be entered the right way - not sure if there is an alternative | |
151 | since the '\' is a valid posix character so we can not switch | |
152 | those safely to '/' if any are found in the middle of the prepath */ | |
153 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
646dd539 SF |
154 | |
155 | if (dfsplen) { | |
0d424ad0 | 156 | strncpy(full_path, tcon->treeName, dfsplen); |
646dd539 SF |
157 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
158 | int i; | |
159 | for (i = 0; i < dfsplen; i++) { | |
160 | if (full_path[i] == '\\') | |
161 | full_path[i] = '/'; | |
162 | } | |
163 | } | |
164 | } | |
1da177e4 LT |
165 | return full_path; |
166 | } | |
167 | ||
d2c12719 MS |
168 | /* |
169 | * Don't allow the separator character in a path component. | |
170 | * The VFS will not allow "/", but "\" is allowed by posix. | |
171 | */ | |
172 | static int | |
173 | check_name(struct dentry *direntry) | |
174 | { | |
175 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); | |
176 | int i; | |
177 | ||
178 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
179 | for (i = 0; i < direntry->d_name.len; i++) { | |
180 | if (direntry->d_name.name[i] == '\\') { | |
f96637be | 181 | cifs_dbg(FYI, "Invalid file name\n"); |
d2c12719 MS |
182 | return -EINVAL; |
183 | } | |
184 | } | |
185 | } | |
186 | return 0; | |
187 | } | |
188 | ||
189 | ||
3979877e | 190 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 | 191 | |
6d5786a3 PS |
192 | static int |
193 | cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, | |
194 | struct tcon_link *tlink, unsigned oflags, umode_t mode, | |
25364138 | 195 | __u32 *oplock, struct cifs_fid *fid, int *created) |
1da177e4 LT |
196 | { |
197 | int rc = -ENOENT; | |
67750fb9 | 198 | int create_options = CREATE_NOT_DIR; |
25364138 | 199 | int desired_access; |
d2c12719 MS |
200 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
201 | struct cifs_tcon *tcon = tlink_tcon(tlink); | |
1da177e4 | 202 | char *full_path = NULL; |
fb8c4b14 | 203 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 204 | struct inode *newinode = NULL; |
d2c12719 | 205 | int disposition; |
25364138 | 206 | struct TCP_Server_Info *server = tcon->ses->server; |
1da177e4 | 207 | |
d2c12719 | 208 | *oplock = 0; |
10b9b98e | 209 | if (tcon->ses->server->oplocks) |
d2c12719 | 210 | *oplock = REQ_OPLOCK; |
c3b2a0c6 | 211 | |
7ffec372 JL |
212 | full_path = build_path_from_dentry(direntry); |
213 | if (full_path == NULL) { | |
214 | rc = -ENOMEM; | |
d2c12719 | 215 | goto out; |
7ffec372 JL |
216 | } |
217 | ||
29e20f9c | 218 | if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open && |
c3b2a0c6 SF |
219 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
220 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
25364138 PS |
221 | rc = cifs_posix_open(full_path, &newinode, inode->i_sb, mode, |
222 | oflags, oplock, &fid->netfid, xid); | |
d2c12719 MS |
223 | switch (rc) { |
224 | case 0: | |
225 | if (newinode == NULL) { | |
226 | /* query inode info */ | |
90e4ee5d | 227 | goto cifs_create_get_file_info; |
d2c12719 MS |
228 | } |
229 | ||
230 | if (!S_ISREG(newinode->i_mode)) { | |
231 | /* | |
232 | * The server may allow us to open things like | |
233 | * FIFOs, but the client isn't set up to deal | |
234 | * with that. If it's not a regular file, just | |
235 | * close it and proceed as if it were a normal | |
236 | * lookup. | |
237 | */ | |
25364138 | 238 | CIFSSMBClose(xid, tcon, fid->netfid); |
d2c12719 MS |
239 | goto cifs_create_get_file_info; |
240 | } | |
241 | /* success, no need to query */ | |
242 | goto cifs_create_set_dentry; | |
243 | ||
244 | case -ENOENT: | |
245 | goto cifs_create_get_file_info; | |
246 | ||
247 | case -EIO: | |
248 | case -EINVAL: | |
249 | /* | |
250 | * EIO could indicate that (posix open) operation is not | |
251 | * supported, despite what server claimed in capability | |
252 | * negotiation. | |
253 | * | |
254 | * POSIX open in samba versions 3.3.1 and earlier could | |
255 | * incorrectly fail with invalid parameter. | |
256 | */ | |
257 | tcon->broken_posix_open = true; | |
258 | break; | |
259 | ||
260 | case -EREMOTE: | |
261 | case -EOPNOTSUPP: | |
262 | /* | |
263 | * EREMOTE indicates DFS junction, which is not handled | |
264 | * in posix open. If either that or op not supported | |
265 | * returned, follow the normal lookup. | |
266 | */ | |
267 | break; | |
e08fc045 | 268 | |
d2c12719 MS |
269 | default: |
270 | goto out; | |
271 | } | |
272 | /* | |
273 | * fallthrough to retry, using older open call, this is case | |
274 | * where server does not support this SMB level, and falsely | |
275 | * claims capability (also get here for DFS case which should be | |
276 | * rare for path not covered on files) | |
277 | */ | |
1da177e4 LT |
278 | } |
279 | ||
25364138 | 280 | desired_access = 0; |
d2c12719 | 281 | if (OPEN_FMODE(oflags) & FMODE_READ) |
25364138 | 282 | desired_access |= GENERIC_READ; /* is this too little? */ |
d2c12719 | 283 | if (OPEN_FMODE(oflags) & FMODE_WRITE) |
25364138 | 284 | desired_access |= GENERIC_WRITE; |
d2c12719 MS |
285 | |
286 | disposition = FILE_OVERWRITE_IF; | |
287 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) | |
288 | disposition = FILE_CREATE; | |
289 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) | |
290 | disposition = FILE_OVERWRITE_IF; | |
291 | else if ((oflags & O_CREAT) == O_CREAT) | |
292 | disposition = FILE_OPEN_IF; | |
293 | else | |
f96637be | 294 | cifs_dbg(FYI, "Create flag not set in create function\n"); |
d2c12719 | 295 | |
25364138 PS |
296 | /* |
297 | * BB add processing to set equivalent of mode - e.g. via CreateX with | |
298 | * ACLs | |
299 | */ | |
300 | ||
301 | if (!server->ops->open) { | |
302 | rc = -ENOSYS; | |
303 | goto out; | |
304 | } | |
1da177e4 | 305 | |
5fdae1f6 SF |
306 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
307 | if (buf == NULL) { | |
232341ba | 308 | rc = -ENOMEM; |
d2c12719 | 309 | goto out; |
1da177e4 | 310 | } |
67750fb9 | 311 | |
67750fb9 JL |
312 | /* |
313 | * if we're not using unix extensions, see if we need to set | |
314 | * ATTR_READONLY on the create call | |
315 | */ | |
f818dd55 | 316 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
317 | create_options |= CREATE_OPTION_READONLY; |
318 | ||
3d3ea8e6 SP |
319 | if (backup_cred(cifs_sb)) |
320 | create_options |= CREATE_OPEN_BACKUP_INTENT; | |
321 | ||
25364138 PS |
322 | rc = server->ops->open(xid, tcon, full_path, disposition, |
323 | desired_access, create_options, fid, oplock, | |
324 | buf, cifs_sb); | |
1da177e4 | 325 | if (rc) { |
f96637be | 326 | cifs_dbg(FYI, "cifs_create returned 0x%x\n", rc); |
d2c12719 | 327 | goto out; |
c3b2a0c6 SF |
328 | } |
329 | ||
25364138 PS |
330 | /* |
331 | * If Open reported that we actually created a file then we now have to | |
332 | * set the mode if possible. | |
333 | */ | |
d2c12719 | 334 | if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) { |
c3b2a0c6 | 335 | struct cifs_unix_set_info_args args = { |
4e1e7fb9 JL |
336 | .mode = mode, |
337 | .ctime = NO_CHANGE_64, | |
338 | .atime = NO_CHANGE_64, | |
339 | .mtime = NO_CHANGE_64, | |
340 | .device = 0, | |
c3b2a0c6 SF |
341 | }; |
342 | ||
47237687 | 343 | *created |= FILE_CREATED; |
c3b2a0c6 | 344 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
49418b2c | 345 | args.uid = current_fsuid(); |
c3b2a0c6 | 346 | if (inode->i_mode & S_ISGID) |
49418b2c | 347 | args.gid = inode->i_gid; |
c3b2a0c6 | 348 | else |
49418b2c | 349 | args.gid = current_fsgid(); |
3ce53fc4 | 350 | } else { |
49418b2c EB |
351 | args.uid = INVALID_UID; /* no change */ |
352 | args.gid = INVALID_GID; /* no change */ | |
1da177e4 | 353 | } |
25364138 PS |
354 | CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid->netfid, |
355 | current->tgid); | |
c3b2a0c6 | 356 | } else { |
25364138 PS |
357 | /* |
358 | * BB implement mode setting via Windows security | |
359 | * descriptors e.g. | |
360 | */ | |
c3b2a0c6 SF |
361 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ |
362 | ||
363 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
364 | } | |
1da177e4 | 365 | |
c3b2a0c6 SF |
366 | cifs_create_get_file_info: |
367 | /* server might mask mode so we have to query for it */ | |
368 | if (tcon->unix_ext) | |
25364138 PS |
369 | rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb, |
370 | xid); | |
c3b2a0c6 | 371 | else { |
25364138 PS |
372 | rc = cifs_get_inode_info(&newinode, full_path, buf, inode->i_sb, |
373 | xid, &fid->netfid); | |
c3b2a0c6 | 374 | if (newinode) { |
b8c32dbb PS |
375 | if (server->ops->set_lease_key) |
376 | server->ops->set_lease_key(newinode, fid); | |
c3b2a0c6 SF |
377 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
378 | newinode->i_mode = mode; | |
d2c12719 | 379 | if ((*oplock & CIFS_CREATE_ACTION) && |
c3b2a0c6 SF |
380 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { |
381 | newinode->i_uid = current_fsuid(); | |
382 | if (inode->i_mode & S_ISGID) | |
383 | newinode->i_gid = inode->i_gid; | |
384 | else | |
385 | newinode->i_gid = current_fsgid(); | |
6473a559 | 386 | } |
1da177e4 | 387 | } |
c3b2a0c6 | 388 | } |
1da177e4 | 389 | |
c3b2a0c6 | 390 | cifs_create_set_dentry: |
d2c12719 | 391 | if (rc != 0) { |
f96637be JP |
392 | cifs_dbg(FYI, "Create worked, get_inode_info failed rc = %d\n", |
393 | rc); | |
25364138 PS |
394 | if (server->ops->close) |
395 | server->ops->close(xid, tcon, fid); | |
d2c12719 MS |
396 | goto out; |
397 | } | |
398 | d_drop(direntry); | |
399 | d_add(direntry, newinode); | |
c3b2a0c6 | 400 | |
d2c12719 MS |
401 | out: |
402 | kfree(buf); | |
403 | kfree(full_path); | |
404 | return rc; | |
405 | } | |
6ca9f3ba | 406 | |
d9585277 | 407 | int |
d2c12719 | 408 | cifs_atomic_open(struct inode *inode, struct dentry *direntry, |
30d90494 | 409 | struct file *file, unsigned oflags, umode_t mode, |
47237687 | 410 | int *opened) |
d2c12719 MS |
411 | { |
412 | int rc; | |
6d5786a3 | 413 | unsigned int xid; |
d2c12719 MS |
414 | struct tcon_link *tlink; |
415 | struct cifs_tcon *tcon; | |
25364138 | 416 | struct TCP_Server_Info *server; |
fb1214e4 | 417 | struct cifs_fid fid; |
233839b1 | 418 | struct cifs_pending_open open; |
d2c12719 | 419 | __u32 oplock; |
fb1214e4 | 420 | struct cifsFileInfo *file_info; |
d2c12719 | 421 | |
fb1214e4 PS |
422 | /* |
423 | * Posix open is only called (at lookup time) for file create now. For | |
d2c12719 MS |
424 | * opens (rather than creates), because we do not know if it is a file |
425 | * or directory yet, and current Samba no longer allows us to do posix | |
426 | * open on dirs, we could end up wasting an open call on what turns out | |
427 | * to be a dir. For file opens, we wait to call posix open till | |
428 | * cifs_open. It could be added to atomic_open in the future but the | |
429 | * performance tradeoff of the extra network request when EISDIR or | |
430 | * EACCES is returned would have to be weighed against the 50% reduction | |
431 | * in network traffic in the other paths. | |
432 | */ | |
433 | if (!(oflags & O_CREAT)) { | |
3798f47a SP |
434 | struct dentry *res; |
435 | ||
436 | /* | |
437 | * Check for hashed negative dentry. We have already revalidated | |
438 | * the dentry and it is fine. No need to perform another lookup. | |
439 | */ | |
440 | if (!d_unhashed(direntry)) | |
441 | return -ENOENT; | |
442 | ||
443 | res = cifs_lookup(inode, direntry, 0); | |
d2c12719 | 444 | if (IS_ERR(res)) |
d9585277 | 445 | return PTR_ERR(res); |
d2c12719 | 446 | |
e45198a6 | 447 | return finish_no_open(file, res); |
d2c12719 MS |
448 | } |
449 | ||
450 | rc = check_name(direntry); | |
451 | if (rc) | |
d9585277 | 452 | return rc; |
d2c12719 | 453 | |
6d5786a3 | 454 | xid = get_xid(); |
d2c12719 | 455 | |
f96637be JP |
456 | cifs_dbg(FYI, "parent inode = 0x%p name is: %s and dentry = 0x%p\n", |
457 | inode, direntry->d_name.name, direntry); | |
d2c12719 MS |
458 | |
459 | tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb)); | |
d2c12719 | 460 | if (IS_ERR(tlink)) |
6d5786a3 | 461 | goto out_free_xid; |
d2c12719 MS |
462 | |
463 | tcon = tlink_tcon(tlink); | |
25364138 | 464 | server = tcon->ses->server; |
d2c12719 | 465 | |
b8c32dbb PS |
466 | if (server->ops->new_lease_key) |
467 | server->ops->new_lease_key(&fid); | |
468 | ||
233839b1 PS |
469 | cifs_add_pending_open(&fid, tlink, &open); |
470 | ||
d2c12719 | 471 | rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, |
25364138 | 472 | &oplock, &fid, opened); |
d2c12719 | 473 | |
233839b1 PS |
474 | if (rc) { |
475 | cifs_del_pending_open(&open); | |
d2c12719 | 476 | goto out; |
233839b1 | 477 | } |
d2c12719 | 478 | |
30d90494 AV |
479 | rc = finish_open(file, direntry, generic_file_open, opened); |
480 | if (rc) { | |
25364138 PS |
481 | if (server->ops->close) |
482 | server->ops->close(xid, tcon, &fid); | |
233839b1 | 483 | cifs_del_pending_open(&open); |
d2c12719 | 484 | goto out; |
5fdae1f6 | 485 | } |
2422f676 | 486 | |
fb1214e4 PS |
487 | file_info = cifs_new_fileinfo(&fid, file, tlink, oplock); |
488 | if (file_info == NULL) { | |
25364138 PS |
489 | if (server->ops->close) |
490 | server->ops->close(xid, tcon, &fid); | |
233839b1 | 491 | cifs_del_pending_open(&open); |
d9585277 | 492 | rc = -ENOMEM; |
d2c12719 MS |
493 | } |
494 | ||
495 | out: | |
496 | cifs_put_tlink(tlink); | |
6d5786a3 PS |
497 | out_free_xid: |
498 | free_xid(xid); | |
d9585277 | 499 | return rc; |
d2c12719 MS |
500 | } |
501 | ||
502 | int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode, | |
ebfc3b49 | 503 | bool excl) |
d2c12719 MS |
504 | { |
505 | int rc; | |
6d5786a3 | 506 | unsigned int xid = get_xid(); |
d2c12719 MS |
507 | /* |
508 | * BB below access is probably too much for mknod to request | |
509 | * but we have to do query and setpathinfo so requesting | |
510 | * less could fail (unless we want to request getatr and setatr | |
511 | * permissions (only). At least for POSIX we do not have to | |
512 | * request so much. | |
513 | */ | |
514 | unsigned oflags = O_EXCL | O_CREAT | O_RDWR; | |
515 | struct tcon_link *tlink; | |
25364138 PS |
516 | struct cifs_tcon *tcon; |
517 | struct TCP_Server_Info *server; | |
518 | struct cifs_fid fid; | |
d2c12719 | 519 | __u32 oplock; |
47237687 | 520 | int created = FILE_CREATED; |
d2c12719 | 521 | |
f96637be JP |
522 | cifs_dbg(FYI, "cifs_create parent inode = 0x%p name is: %s and dentry = 0x%p\n", |
523 | inode, direntry->d_name.name, direntry); | |
d2c12719 MS |
524 | |
525 | tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb)); | |
526 | rc = PTR_ERR(tlink); | |
527 | if (IS_ERR(tlink)) | |
6d5786a3 | 528 | goto out_free_xid; |
d2c12719 | 529 | |
25364138 PS |
530 | tcon = tlink_tcon(tlink); |
531 | server = tcon->ses->server; | |
b8c32dbb PS |
532 | |
533 | if (server->ops->new_lease_key) | |
534 | server->ops->new_lease_key(&fid); | |
535 | ||
536 | rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, | |
537 | &oplock, &fid, &created); | |
25364138 PS |
538 | if (!rc && server->ops->close) |
539 | server->ops->close(xid, tcon, &fid); | |
d2c12719 | 540 | |
7ffec372 | 541 | cifs_put_tlink(tlink); |
6d5786a3 PS |
542 | out_free_xid: |
543 | free_xid(xid); | |
1da177e4 LT |
544 | return rc; |
545 | } | |
546 | ||
1a67aafb | 547 | int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode, |
5fdae1f6 | 548 | dev_t device_number) |
1da177e4 LT |
549 | { |
550 | int rc = -EPERM; | |
6d5786a3 | 551 | unsigned int xid; |
3d3ea8e6 | 552 | int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL; |
1da177e4 | 553 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 554 | struct tcon_link *tlink; |
96daf2b0 | 555 | struct cifs_tcon *pTcon; |
fa2989f4 | 556 | struct cifs_io_parms io_parms; |
1da177e4 | 557 | char *full_path = NULL; |
fb8c4b14 | 558 | struct inode *newinode = NULL; |
5d9ac7fd JL |
559 | int oplock = 0; |
560 | u16 fileHandle; | |
561 | FILE_ALL_INFO *buf = NULL; | |
562 | unsigned int bytes_written; | |
563 | struct win_dev *pdev; | |
1da177e4 LT |
564 | |
565 | if (!old_valid_dev(device_number)) | |
566 | return -EINVAL; | |
567 | ||
1da177e4 | 568 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
569 | tlink = cifs_sb_tlink(cifs_sb); |
570 | if (IS_ERR(tlink)) | |
571 | return PTR_ERR(tlink); | |
572 | ||
573 | pTcon = tlink_tcon(tlink); | |
574 | ||
6d5786a3 | 575 | xid = get_xid(); |
1da177e4 | 576 | |
1da177e4 | 577 | full_path = build_path_from_dentry(direntry); |
5d9ac7fd | 578 | if (full_path == NULL) { |
1da177e4 | 579 | rc = -ENOMEM; |
5d9ac7fd JL |
580 | goto mknod_out; |
581 | } | |
582 | ||
583 | if (pTcon->unix_ext) { | |
4e1e7fb9 | 584 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 585 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
586 | .ctime = NO_CHANGE_64, |
587 | .atime = NO_CHANGE_64, | |
588 | .mtime = NO_CHANGE_64, | |
589 | .device = device_number, | |
590 | }; | |
5fdae1f6 | 591 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
49418b2c EB |
592 | args.uid = current_fsuid(); |
593 | args.gid = current_fsgid(); | |
1da177e4 | 594 | } else { |
49418b2c EB |
595 | args.uid = INVALID_UID; /* no change */ |
596 | args.gid = INVALID_GID; /* no change */ | |
1da177e4 | 597 | } |
01ea95e3 JL |
598 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
599 | cifs_sb->local_nls, | |
600 | cifs_sb->mnt_cifs_flags & | |
601 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5d9ac7fd JL |
602 | if (rc) |
603 | goto mknod_out; | |
1da177e4 | 604 | |
5d9ac7fd | 605 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 606 | inode->i_sb, xid); |
eda3c029 | 607 | |
5d9ac7fd JL |
608 | if (rc == 0) |
609 | d_instantiate(direntry, newinode); | |
610 | goto mknod_out; | |
1da177e4 LT |
611 | } |
612 | ||
5d9ac7fd JL |
613 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) |
614 | goto mknod_out; | |
615 | ||
616 | ||
f96637be | 617 | cifs_dbg(FYI, "sfu compat create special file\n"); |
5d9ac7fd JL |
618 | |
619 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
620 | if (buf == NULL) { | |
621 | kfree(full_path); | |
622 | rc = -ENOMEM; | |
6d5786a3 | 623 | free_xid(xid); |
5d9ac7fd JL |
624 | return rc; |
625 | } | |
626 | ||
3d3ea8e6 SP |
627 | if (backup_cred(cifs_sb)) |
628 | create_options |= CREATE_OPEN_BACKUP_INTENT; | |
629 | ||
5d9ac7fd | 630 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, |
3d3ea8e6 | 631 | GENERIC_WRITE, create_options, |
5d9ac7fd JL |
632 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
633 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
634 | if (rc) | |
635 | goto mknod_out; | |
636 | ||
637 | /* BB Do not bother to decode buf since no local inode yet to put | |
638 | * timestamps in, but we can reuse it safely */ | |
639 | ||
640 | pdev = (struct win_dev *)buf; | |
fa2989f4 PS |
641 | io_parms.netfid = fileHandle; |
642 | io_parms.pid = current->tgid; | |
643 | io_parms.tcon = pTcon; | |
644 | io_parms.offset = 0; | |
645 | io_parms.length = sizeof(struct win_dev); | |
5d9ac7fd JL |
646 | if (S_ISCHR(mode)) { |
647 | memcpy(pdev->type, "IntxCHR", 8); | |
648 | pdev->major = | |
649 | cpu_to_le64(MAJOR(device_number)); | |
650 | pdev->minor = | |
651 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
652 | rc = CIFSSMBWrite(xid, &io_parms, |
653 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
654 | NULL, 0); |
655 | } else if (S_ISBLK(mode)) { | |
656 | memcpy(pdev->type, "IntxBLK", 8); | |
657 | pdev->major = | |
658 | cpu_to_le64(MAJOR(device_number)); | |
659 | pdev->minor = | |
660 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
661 | rc = CIFSSMBWrite(xid, &io_parms, |
662 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
663 | NULL, 0); |
664 | } /* else if (S_ISFIFO) */ | |
665 | CIFSSMBClose(xid, pTcon, fileHandle); | |
666 | d_drop(direntry); | |
667 | ||
668 | /* FIXME: add code here to set EAs */ | |
669 | ||
670 | mknod_out: | |
d14537f1 | 671 | kfree(full_path); |
5d9ac7fd | 672 | kfree(buf); |
6d5786a3 | 673 | free_xid(xid); |
7ffec372 | 674 | cifs_put_tlink(tlink); |
1da177e4 LT |
675 | return rc; |
676 | } | |
677 | ||
1da177e4 | 678 | struct dentry * |
5fdae1f6 | 679 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
00cd8dd3 | 680 | unsigned int flags) |
1da177e4 | 681 | { |
6d5786a3 | 682 | unsigned int xid; |
1da177e4 LT |
683 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ |
684 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 685 | struct tcon_link *tlink; |
96daf2b0 | 686 | struct cifs_tcon *pTcon; |
1da177e4 LT |
687 | struct inode *newInode = NULL; |
688 | char *full_path = NULL; | |
689 | ||
6d5786a3 | 690 | xid = get_xid(); |
1da177e4 | 691 | |
f96637be JP |
692 | cifs_dbg(FYI, "parent inode = 0x%p name is: %s and dentry = 0x%p\n", |
693 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 694 | |
1da177e4 LT |
695 | /* check whether path exists */ |
696 | ||
697 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
7ffec372 JL |
698 | tlink = cifs_sb_tlink(cifs_sb); |
699 | if (IS_ERR(tlink)) { | |
6d5786a3 | 700 | free_xid(xid); |
7ffec372 JL |
701 | return (struct dentry *)tlink; |
702 | } | |
703 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 704 | |
d2c12719 MS |
705 | rc = check_name(direntry); |
706 | if (rc) | |
7ffec372 | 707 | goto lookup_out; |
5ddf1e0f | 708 | |
1da177e4 LT |
709 | /* can not grab the rename sem here since it would |
710 | deadlock in the cases (beginning of sys_rename itself) | |
711 | in which we already have the sb rename sem */ | |
712 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 713 | if (full_path == NULL) { |
7ffec372 JL |
714 | rc = -ENOMEM; |
715 | goto lookup_out; | |
1da177e4 LT |
716 | } |
717 | ||
718 | if (direntry->d_inode != NULL) { | |
f96637be | 719 | cifs_dbg(FYI, "non-NULL inode in lookup\n"); |
1da177e4 | 720 | } else { |
f96637be | 721 | cifs_dbg(FYI, "NULL inode in lookup\n"); |
1da177e4 | 722 | } |
f96637be JP |
723 | cifs_dbg(FYI, "Full path: %s inode = 0x%p\n", |
724 | full_path, direntry->d_inode); | |
1da177e4 | 725 | |
a6ce4932 | 726 | if (pTcon->unix_ext) { |
d2c12719 MS |
727 | rc = cifs_get_inode_info_unix(&newInode, full_path, |
728 | parent_dir_inode->i_sb, xid); | |
729 | } else { | |
1da177e4 | 730 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 731 | parent_dir_inode->i_sb, xid, NULL); |
d2c12719 | 732 | } |
1da177e4 LT |
733 | |
734 | if ((rc == 0) && (newInode != NULL)) { | |
1da177e4 | 735 | d_add(direntry, newInode); |
5fdae1f6 | 736 | /* since paths are not looked up by component - the parent |
3abb9272 | 737 | directories are presumed to be good here */ |
1da177e4 LT |
738 | renew_parental_timestamps(direntry); |
739 | ||
740 | } else if (rc == -ENOENT) { | |
741 | rc = 0; | |
3abb9272 | 742 | direntry->d_time = jiffies; |
1da177e4 | 743 | d_add(direntry, NULL); |
5fdae1f6 SF |
744 | /* if it was once a directory (but how can we tell?) we could do |
745 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 746 | } else if (rc != -EACCES) { |
f96637be | 747 | cifs_dbg(VFS, "Unexpected lookup error %d\n", rc); |
ed2b9170 SF |
748 | /* We special case check for Access Denied - since that |
749 | is a common return code */ | |
1da177e4 LT |
750 | } |
751 | ||
2422f676 | 752 | lookup_out: |
d14537f1 | 753 | kfree(full_path); |
7ffec372 | 754 | cifs_put_tlink(tlink); |
6d5786a3 | 755 | free_xid(xid); |
1da177e4 LT |
756 | return ERR_PTR(rc); |
757 | } | |
758 | ||
1da177e4 | 759 | static int |
0b728e19 | 760 | cifs_d_revalidate(struct dentry *direntry, unsigned int flags) |
1da177e4 | 761 | { |
0b728e19 | 762 | if (flags & LOOKUP_RCU) |
34286d66 NP |
763 | return -ECHILD; |
764 | ||
1da177e4 | 765 | if (direntry->d_inode) { |
df2cf170 | 766 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 767 | return 0; |
ad4778fb GF |
768 | else { |
769 | /* | |
936ad909 IK |
770 | * If the inode wasn't known to be a dfs entry when |
771 | * the dentry was instantiated, such as when created | |
772 | * via ->readdir(), it needs to be set now since the | |
773 | * attributes will have been updated by | |
774 | * cifs_revalidate_dentry(). | |
ad4778fb | 775 | */ |
936ad909 IK |
776 | if (IS_AUTOMOUNT(direntry->d_inode) && |
777 | !(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) { | |
778 | spin_lock(&direntry->d_lock); | |
779 | direntry->d_flags |= DCACHE_NEED_AUTOMOUNT; | |
780 | spin_unlock(&direntry->d_lock); | |
781 | } | |
782 | ||
262f86ad | 783 | return 1; |
ad4778fb | 784 | } |
1da177e4 LT |
785 | } |
786 | ||
262f86ad NP |
787 | /* |
788 | * This may be nfsd (or something), anyway, we can't see the | |
789 | * intent of this. So, since this can be for creation, drop it. | |
790 | */ | |
0b728e19 | 791 | if (!flags) |
262f86ad NP |
792 | return 0; |
793 | ||
794 | /* | |
795 | * Drop the negative dentry, in order to make sure to use the | |
796 | * case sensitive name which is specified by user if this is | |
797 | * for creation. | |
798 | */ | |
0b728e19 | 799 | if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) |
407938e7 | 800 | return 0; |
262f86ad NP |
801 | |
802 | if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) | |
803 | return 0; | |
804 | ||
805 | return 1; | |
1da177e4 LT |
806 | } |
807 | ||
808 | /* static int cifs_d_delete(struct dentry *direntry) | |
809 | { | |
810 | int rc = 0; | |
811 | ||
f96637be | 812 | cifs_dbg(FYI, "In cifs d_delete, name = %s\n", direntry->d_name.name); |
1da177e4 LT |
813 | |
814 | return rc; | |
815 | } */ | |
816 | ||
4fd03e84 | 817 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 818 | .d_revalidate = cifs_d_revalidate, |
01c64fea | 819 | .d_automount = cifs_dfs_d_automount, |
5fdae1f6 | 820 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 821 | }; |
b92327fe | 822 | |
b1e6a015 NP |
823 | static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, |
824 | struct qstr *q) | |
b92327fe | 825 | { |
b1e6a015 | 826 | struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; |
b92327fe SF |
827 | unsigned long hash; |
828 | int i; | |
829 | ||
830 | hash = init_name_hash(); | |
831 | for (i = 0; i < q->len; i++) | |
832 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
833 | hash); | |
834 | q->hash = end_name_hash(hash); | |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
621e155a NP |
839 | static int cifs_ci_compare(const struct dentry *parent, |
840 | const struct inode *pinode, | |
841 | const struct dentry *dentry, const struct inode *inode, | |
842 | unsigned int len, const char *str, const struct qstr *name) | |
b92327fe | 843 | { |
621e155a | 844 | struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; |
b92327fe | 845 | |
621e155a NP |
846 | if ((name->len == len) && |
847 | (nls_strnicmp(codepage, name->name, str, len) == 0)) | |
b92327fe | 848 | return 0; |
b92327fe SF |
849 | return 1; |
850 | } | |
851 | ||
4fd03e84 | 852 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
853 | .d_revalidate = cifs_d_revalidate, |
854 | .d_hash = cifs_ci_hash, | |
855 | .d_compare = cifs_ci_compare, | |
01c64fea | 856 | .d_automount = cifs_dfs_d_automount, |
b92327fe | 857 | }; |