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" | |
ec71e0e1 | 35 | #include "cifs_unicode.h" |
1da177e4 | 36 | |
99ee4dbd | 37 | static void |
1da177e4 LT |
38 | renew_parental_timestamps(struct dentry *direntry) |
39 | { | |
5fdae1f6 SF |
40 | /* BB check if there is a way to get the kernel to do this or if we |
41 | really need this */ | |
1da177e4 LT |
42 | do { |
43 | direntry->d_time = jiffies; | |
44 | direntry = direntry->d_parent; | |
5fdae1f6 | 45 | } while (!IS_ROOT(direntry)); |
1da177e4 LT |
46 | } |
47 | ||
6d3ea7e4 SF |
48 | char * |
49 | cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, | |
50 | struct cifs_tcon *tcon) | |
51 | { | |
839db3d1 | 52 | int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; |
6d3ea7e4 SF |
53 | int dfsplen; |
54 | char *full_path = NULL; | |
55 | ||
56 | /* if no prefix path, simply set path to the root of share to "" */ | |
57 | if (pplen == 0) { | |
58 | full_path = kzalloc(1, GFP_KERNEL); | |
59 | return full_path; | |
60 | } | |
61 | ||
62 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) | |
63 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
64 | else | |
65 | dfsplen = 0; | |
66 | ||
67 | full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); | |
68 | if (full_path == NULL) | |
69 | return full_path; | |
70 | ||
71 | if (dfsplen) | |
72 | strncpy(full_path, tcon->treeName, dfsplen); | |
839db3d1 JL |
73 | full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb); |
74 | strncpy(full_path + dfsplen + 1, vol->prepath, pplen); | |
6d3ea7e4 SF |
75 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
76 | full_path[dfsplen + pplen] = 0; /* add trailing null */ | |
77 | return full_path; | |
78 | } | |
79 | ||
1da177e4 LT |
80 | /* Note: caller must free return buffer */ |
81 | char * | |
82 | build_path_from_dentry(struct dentry *direntry) | |
83 | { | |
84 | struct dentry *temp; | |
2fe87f02 | 85 | int namelen; |
646dd539 | 86 | int dfsplen; |
1da177e4 | 87 | char *full_path; |
88274815 | 88 | char dirsep; |
0d424ad0 | 89 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 90 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
dc137bf5 | 91 | unsigned seq; |
1da177e4 | 92 | |
646dd539 | 93 | dirsep = CIFS_DIR_SEP(cifs_sb); |
0d424ad0 JL |
94 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
95 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
646dd539 SF |
96 | else |
97 | dfsplen = 0; | |
1da177e4 | 98 | cifs_bp_rename_retry: |
f87d39d9 | 99 | namelen = dfsplen; |
dc137bf5 AV |
100 | seq = read_seqbegin(&rename_lock); |
101 | rcu_read_lock(); | |
1da177e4 LT |
102 | for (temp = direntry; !IS_ROOT(temp);) { |
103 | namelen += (1 + temp->d_name.len); | |
104 | temp = temp->d_parent; | |
5fdae1f6 | 105 | if (temp == NULL) { |
f96637be | 106 | cifs_dbg(VFS, "corrupt dentry\n"); |
dc137bf5 | 107 | rcu_read_unlock(); |
1da177e4 LT |
108 | return NULL; |
109 | } | |
110 | } | |
dc137bf5 | 111 | rcu_read_unlock(); |
1da177e4 LT |
112 | |
113 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 114 | if (full_path == NULL) |
1da177e4 LT |
115 | return full_path; |
116 | full_path[namelen] = 0; /* trailing null */ | |
dc137bf5 | 117 | rcu_read_lock(); |
1da177e4 | 118 | for (temp = direntry; !IS_ROOT(temp);) { |
dc137bf5 | 119 | spin_lock(&temp->d_lock); |
1da177e4 LT |
120 | namelen -= 1 + temp->d_name.len; |
121 | if (namelen < 0) { | |
dc137bf5 | 122 | spin_unlock(&temp->d_lock); |
1da177e4 LT |
123 | break; |
124 | } else { | |
7f57356b | 125 | full_path[namelen] = dirsep; |
1da177e4 LT |
126 | strncpy(full_path + namelen + 1, temp->d_name.name, |
127 | temp->d_name.len); | |
f96637be | 128 | cifs_dbg(FYI, "name: %s\n", full_path + namelen); |
1da177e4 | 129 | } |
dc137bf5 | 130 | spin_unlock(&temp->d_lock); |
1da177e4 | 131 | temp = temp->d_parent; |
5fdae1f6 | 132 | if (temp == NULL) { |
f96637be | 133 | cifs_dbg(VFS, "corrupt dentry\n"); |
dc137bf5 | 134 | rcu_read_unlock(); |
1da177e4 LT |
135 | kfree(full_path); |
136 | return NULL; | |
137 | } | |
138 | } | |
dc137bf5 AV |
139 | rcu_read_unlock(); |
140 | if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) { | |
f96637be JP |
141 | cifs_dbg(FYI, "did not end path lookup where expected. namelen=%ddfsplen=%d\n", |
142 | namelen, dfsplen); | |
5fdae1f6 | 143 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
144 | of one of the parent directories (we can not lock the dentries |
145 | above us to prevent this, but retrying should be harmless) */ | |
146 | kfree(full_path); | |
1da177e4 LT |
147 | goto cifs_bp_rename_retry; |
148 | } | |
2fe87f02 SF |
149 | /* DIR_SEP already set for byte 0 / vs \ but not for |
150 | subsequent slashes in prepath which currently must | |
151 | be entered the right way - not sure if there is an alternative | |
152 | since the '\' is a valid posix character so we can not switch | |
153 | those safely to '/' if any are found in the middle of the prepath */ | |
154 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
646dd539 SF |
155 | |
156 | if (dfsplen) { | |
0d424ad0 | 157 | strncpy(full_path, tcon->treeName, dfsplen); |
646dd539 SF |
158 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
159 | int i; | |
160 | for (i = 0; i < dfsplen; i++) { | |
161 | if (full_path[i] == '\\') | |
162 | full_path[i] = '/'; | |
163 | } | |
164 | } | |
165 | } | |
1da177e4 LT |
166 | return full_path; |
167 | } | |
168 | ||
d2c12719 MS |
169 | /* |
170 | * Don't allow the separator character in a path component. | |
171 | * The VFS will not allow "/", but "\" is allowed by posix. | |
172 | */ | |
173 | static int | |
174 | check_name(struct dentry *direntry) | |
175 | { | |
176 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); | |
177 | int i; | |
178 | ||
179 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
180 | for (i = 0; i < direntry->d_name.len; i++) { | |
181 | if (direntry->d_name.name[i] == '\\') { | |
f96637be | 182 | cifs_dbg(FYI, "Invalid file name\n"); |
d2c12719 MS |
183 | return -EINVAL; |
184 | } | |
185 | } | |
186 | } | |
187 | return 0; | |
188 | } | |
189 | ||
190 | ||
3979877e | 191 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 | 192 | |
6d5786a3 PS |
193 | static int |
194 | cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid, | |
195 | struct tcon_link *tlink, unsigned oflags, umode_t mode, | |
25364138 | 196 | __u32 *oplock, struct cifs_fid *fid, int *created) |
1da177e4 LT |
197 | { |
198 | int rc = -ENOENT; | |
67750fb9 | 199 | int create_options = CREATE_NOT_DIR; |
25364138 | 200 | int desired_access; |
d2c12719 MS |
201 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
202 | struct cifs_tcon *tcon = tlink_tcon(tlink); | |
1da177e4 | 203 | char *full_path = NULL; |
fb8c4b14 | 204 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 205 | struct inode *newinode = NULL; |
d2c12719 | 206 | int disposition; |
25364138 | 207 | struct TCP_Server_Info *server = tcon->ses->server; |
226730b4 | 208 | struct cifs_open_parms oparms; |
1da177e4 | 209 | |
d2c12719 | 210 | *oplock = 0; |
10b9b98e | 211 | if (tcon->ses->server->oplocks) |
d2c12719 | 212 | *oplock = REQ_OPLOCK; |
c3b2a0c6 | 213 | |
7ffec372 JL |
214 | full_path = build_path_from_dentry(direntry); |
215 | if (full_path == NULL) { | |
216 | rc = -ENOMEM; | |
d2c12719 | 217 | goto out; |
7ffec372 JL |
218 | } |
219 | ||
29e20f9c | 220 | if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open && |
c3b2a0c6 SF |
221 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
222 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
25364138 PS |
223 | rc = cifs_posix_open(full_path, &newinode, inode->i_sb, mode, |
224 | oflags, oplock, &fid->netfid, xid); | |
d2c12719 MS |
225 | switch (rc) { |
226 | case 0: | |
227 | if (newinode == NULL) { | |
228 | /* query inode info */ | |
90e4ee5d | 229 | goto cifs_create_get_file_info; |
d2c12719 MS |
230 | } |
231 | ||
232 | if (!S_ISREG(newinode->i_mode)) { | |
233 | /* | |
234 | * The server may allow us to open things like | |
235 | * FIFOs, but the client isn't set up to deal | |
236 | * with that. If it's not a regular file, just | |
237 | * close it and proceed as if it were a normal | |
238 | * lookup. | |
239 | */ | |
25364138 | 240 | CIFSSMBClose(xid, tcon, fid->netfid); |
d2c12719 MS |
241 | goto cifs_create_get_file_info; |
242 | } | |
243 | /* success, no need to query */ | |
244 | goto cifs_create_set_dentry; | |
245 | ||
246 | case -ENOENT: | |
247 | goto cifs_create_get_file_info; | |
248 | ||
249 | case -EIO: | |
250 | case -EINVAL: | |
251 | /* | |
252 | * EIO could indicate that (posix open) operation is not | |
253 | * supported, despite what server claimed in capability | |
254 | * negotiation. | |
255 | * | |
256 | * POSIX open in samba versions 3.3.1 and earlier could | |
257 | * incorrectly fail with invalid parameter. | |
258 | */ | |
259 | tcon->broken_posix_open = true; | |
260 | break; | |
261 | ||
262 | case -EREMOTE: | |
263 | case -EOPNOTSUPP: | |
264 | /* | |
265 | * EREMOTE indicates DFS junction, which is not handled | |
266 | * in posix open. If either that or op not supported | |
267 | * returned, follow the normal lookup. | |
268 | */ | |
269 | break; | |
e08fc045 | 270 | |
d2c12719 MS |
271 | default: |
272 | goto out; | |
273 | } | |
274 | /* | |
275 | * fallthrough to retry, using older open call, this is case | |
276 | * where server does not support this SMB level, and falsely | |
277 | * claims capability (also get here for DFS case which should be | |
278 | * rare for path not covered on files) | |
279 | */ | |
1da177e4 LT |
280 | } |
281 | ||
25364138 | 282 | desired_access = 0; |
d2c12719 | 283 | if (OPEN_FMODE(oflags) & FMODE_READ) |
25364138 | 284 | desired_access |= GENERIC_READ; /* is this too little? */ |
d2c12719 | 285 | if (OPEN_FMODE(oflags) & FMODE_WRITE) |
25364138 | 286 | desired_access |= GENERIC_WRITE; |
d2c12719 MS |
287 | |
288 | disposition = FILE_OVERWRITE_IF; | |
289 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) | |
290 | disposition = FILE_CREATE; | |
291 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) | |
292 | disposition = FILE_OVERWRITE_IF; | |
293 | else if ((oflags & O_CREAT) == O_CREAT) | |
294 | disposition = FILE_OPEN_IF; | |
295 | else | |
f96637be | 296 | cifs_dbg(FYI, "Create flag not set in create function\n"); |
d2c12719 | 297 | |
25364138 PS |
298 | /* |
299 | * BB add processing to set equivalent of mode - e.g. via CreateX with | |
300 | * ACLs | |
301 | */ | |
302 | ||
303 | if (!server->ops->open) { | |
304 | rc = -ENOSYS; | |
305 | goto out; | |
306 | } | |
1da177e4 | 307 | |
5fdae1f6 SF |
308 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
309 | if (buf == NULL) { | |
232341ba | 310 | rc = -ENOMEM; |
d2c12719 | 311 | goto out; |
1da177e4 | 312 | } |
67750fb9 | 313 | |
67750fb9 JL |
314 | /* |
315 | * if we're not using unix extensions, see if we need to set | |
316 | * ATTR_READONLY on the create call | |
317 | */ | |
f818dd55 | 318 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
319 | create_options |= CREATE_OPTION_READONLY; |
320 | ||
3d3ea8e6 SP |
321 | if (backup_cred(cifs_sb)) |
322 | create_options |= CREATE_OPEN_BACKUP_INTENT; | |
323 | ||
226730b4 PS |
324 | oparms.tcon = tcon; |
325 | oparms.cifs_sb = cifs_sb; | |
326 | oparms.desired_access = desired_access; | |
327 | oparms.create_options = create_options; | |
328 | oparms.disposition = disposition; | |
329 | oparms.path = full_path; | |
330 | oparms.fid = fid; | |
9cbc0b73 | 331 | oparms.reconnect = false; |
226730b4 PS |
332 | |
333 | rc = server->ops->open(xid, &oparms, oplock, buf); | |
1da177e4 | 334 | if (rc) { |
f96637be | 335 | cifs_dbg(FYI, "cifs_create returned 0x%x\n", rc); |
d2c12719 | 336 | goto out; |
c3b2a0c6 SF |
337 | } |
338 | ||
25364138 PS |
339 | /* |
340 | * If Open reported that we actually created a file then we now have to | |
341 | * set the mode if possible. | |
342 | */ | |
d2c12719 | 343 | if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) { |
c3b2a0c6 | 344 | struct cifs_unix_set_info_args args = { |
4e1e7fb9 JL |
345 | .mode = mode, |
346 | .ctime = NO_CHANGE_64, | |
347 | .atime = NO_CHANGE_64, | |
348 | .mtime = NO_CHANGE_64, | |
349 | .device = 0, | |
c3b2a0c6 SF |
350 | }; |
351 | ||
47237687 | 352 | *created |= FILE_CREATED; |
c3b2a0c6 | 353 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
49418b2c | 354 | args.uid = current_fsuid(); |
c3b2a0c6 | 355 | if (inode->i_mode & S_ISGID) |
49418b2c | 356 | args.gid = inode->i_gid; |
c3b2a0c6 | 357 | else |
49418b2c | 358 | args.gid = current_fsgid(); |
3ce53fc4 | 359 | } else { |
49418b2c EB |
360 | args.uid = INVALID_UID; /* no change */ |
361 | args.gid = INVALID_GID; /* no change */ | |
1da177e4 | 362 | } |
25364138 PS |
363 | CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid->netfid, |
364 | current->tgid); | |
c3b2a0c6 | 365 | } else { |
25364138 PS |
366 | /* |
367 | * BB implement mode setting via Windows security | |
368 | * descriptors e.g. | |
369 | */ | |
c3b2a0c6 SF |
370 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ |
371 | ||
372 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
373 | } | |
1da177e4 | 374 | |
c3b2a0c6 SF |
375 | cifs_create_get_file_info: |
376 | /* server might mask mode so we have to query for it */ | |
377 | if (tcon->unix_ext) | |
25364138 PS |
378 | rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb, |
379 | xid); | |
c3b2a0c6 | 380 | else { |
25364138 PS |
381 | rc = cifs_get_inode_info(&newinode, full_path, buf, inode->i_sb, |
382 | xid, &fid->netfid); | |
c3b2a0c6 | 383 | if (newinode) { |
b8c32dbb PS |
384 | if (server->ops->set_lease_key) |
385 | server->ops->set_lease_key(newinode, fid); | |
c3b2a0c6 SF |
386 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
387 | newinode->i_mode = mode; | |
d2c12719 | 388 | if ((*oplock & CIFS_CREATE_ACTION) && |
c3b2a0c6 SF |
389 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { |
390 | newinode->i_uid = current_fsuid(); | |
391 | if (inode->i_mode & S_ISGID) | |
392 | newinode->i_gid = inode->i_gid; | |
393 | else | |
394 | newinode->i_gid = current_fsgid(); | |
6473a559 | 395 | } |
1da177e4 | 396 | } |
c3b2a0c6 | 397 | } |
1da177e4 | 398 | |
c3b2a0c6 | 399 | cifs_create_set_dentry: |
d2c12719 | 400 | if (rc != 0) { |
f96637be JP |
401 | cifs_dbg(FYI, "Create worked, get_inode_info failed rc = %d\n", |
402 | rc); | |
25364138 PS |
403 | if (server->ops->close) |
404 | server->ops->close(xid, tcon, fid); | |
d2c12719 MS |
405 | goto out; |
406 | } | |
407 | d_drop(direntry); | |
408 | d_add(direntry, newinode); | |
c3b2a0c6 | 409 | |
d2c12719 MS |
410 | out: |
411 | kfree(buf); | |
412 | kfree(full_path); | |
413 | return rc; | |
414 | } | |
6ca9f3ba | 415 | |
d9585277 | 416 | int |
d2c12719 | 417 | cifs_atomic_open(struct inode *inode, struct dentry *direntry, |
30d90494 | 418 | struct file *file, unsigned oflags, umode_t mode, |
47237687 | 419 | int *opened) |
d2c12719 MS |
420 | { |
421 | int rc; | |
6d5786a3 | 422 | unsigned int xid; |
d2c12719 MS |
423 | struct tcon_link *tlink; |
424 | struct cifs_tcon *tcon; | |
25364138 | 425 | struct TCP_Server_Info *server; |
fb1214e4 | 426 | struct cifs_fid fid; |
233839b1 | 427 | struct cifs_pending_open open; |
d2c12719 | 428 | __u32 oplock; |
fb1214e4 | 429 | struct cifsFileInfo *file_info; |
d2c12719 | 430 | |
fb1214e4 PS |
431 | /* |
432 | * Posix open is only called (at lookup time) for file create now. For | |
d2c12719 MS |
433 | * opens (rather than creates), because we do not know if it is a file |
434 | * or directory yet, and current Samba no longer allows us to do posix | |
435 | * open on dirs, we could end up wasting an open call on what turns out | |
436 | * to be a dir. For file opens, we wait to call posix open till | |
437 | * cifs_open. It could be added to atomic_open in the future but the | |
438 | * performance tradeoff of the extra network request when EISDIR or | |
439 | * EACCES is returned would have to be weighed against the 50% reduction | |
440 | * in network traffic in the other paths. | |
441 | */ | |
442 | if (!(oflags & O_CREAT)) { | |
3798f47a SP |
443 | struct dentry *res; |
444 | ||
445 | /* | |
446 | * Check for hashed negative dentry. We have already revalidated | |
447 | * the dentry and it is fine. No need to perform another lookup. | |
448 | */ | |
449 | if (!d_unhashed(direntry)) | |
450 | return -ENOENT; | |
451 | ||
452 | res = cifs_lookup(inode, direntry, 0); | |
d2c12719 | 453 | if (IS_ERR(res)) |
d9585277 | 454 | return PTR_ERR(res); |
d2c12719 | 455 | |
e45198a6 | 456 | return finish_no_open(file, res); |
d2c12719 MS |
457 | } |
458 | ||
459 | rc = check_name(direntry); | |
460 | if (rc) | |
d9585277 | 461 | return rc; |
d2c12719 | 462 | |
6d5786a3 | 463 | xid = get_xid(); |
d2c12719 | 464 | |
f96637be JP |
465 | cifs_dbg(FYI, "parent inode = 0x%p name is: %s and dentry = 0x%p\n", |
466 | inode, direntry->d_name.name, direntry); | |
d2c12719 MS |
467 | |
468 | tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb)); | |
efb79f28 WY |
469 | if (IS_ERR(tlink)) { |
470 | rc = PTR_ERR(tlink); | |
6d5786a3 | 471 | goto out_free_xid; |
efb79f28 | 472 | } |
d2c12719 MS |
473 | |
474 | tcon = tlink_tcon(tlink); | |
25364138 | 475 | server = tcon->ses->server; |
d2c12719 | 476 | |
b8c32dbb PS |
477 | if (server->ops->new_lease_key) |
478 | server->ops->new_lease_key(&fid); | |
479 | ||
233839b1 PS |
480 | cifs_add_pending_open(&fid, tlink, &open); |
481 | ||
d2c12719 | 482 | rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, |
25364138 | 483 | &oplock, &fid, opened); |
d2c12719 | 484 | |
233839b1 PS |
485 | if (rc) { |
486 | cifs_del_pending_open(&open); | |
d2c12719 | 487 | goto out; |
233839b1 | 488 | } |
d2c12719 | 489 | |
30d90494 AV |
490 | rc = finish_open(file, direntry, generic_file_open, opened); |
491 | if (rc) { | |
25364138 PS |
492 | if (server->ops->close) |
493 | server->ops->close(xid, tcon, &fid); | |
233839b1 | 494 | cifs_del_pending_open(&open); |
d2c12719 | 495 | goto out; |
5fdae1f6 | 496 | } |
2422f676 | 497 | |
fb1214e4 PS |
498 | file_info = cifs_new_fileinfo(&fid, file, tlink, oplock); |
499 | if (file_info == NULL) { | |
25364138 PS |
500 | if (server->ops->close) |
501 | server->ops->close(xid, tcon, &fid); | |
233839b1 | 502 | cifs_del_pending_open(&open); |
dfb1d61b | 503 | fput(file); |
d9585277 | 504 | rc = -ENOMEM; |
d2c12719 MS |
505 | } |
506 | ||
507 | out: | |
508 | cifs_put_tlink(tlink); | |
6d5786a3 PS |
509 | out_free_xid: |
510 | free_xid(xid); | |
d9585277 | 511 | return rc; |
d2c12719 MS |
512 | } |
513 | ||
514 | int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode, | |
ebfc3b49 | 515 | bool excl) |
d2c12719 MS |
516 | { |
517 | int rc; | |
6d5786a3 | 518 | unsigned int xid = get_xid(); |
d2c12719 MS |
519 | /* |
520 | * BB below access is probably too much for mknod to request | |
521 | * but we have to do query and setpathinfo so requesting | |
522 | * less could fail (unless we want to request getatr and setatr | |
523 | * permissions (only). At least for POSIX we do not have to | |
524 | * request so much. | |
525 | */ | |
526 | unsigned oflags = O_EXCL | O_CREAT | O_RDWR; | |
527 | struct tcon_link *tlink; | |
25364138 PS |
528 | struct cifs_tcon *tcon; |
529 | struct TCP_Server_Info *server; | |
530 | struct cifs_fid fid; | |
d2c12719 | 531 | __u32 oplock; |
47237687 | 532 | int created = FILE_CREATED; |
d2c12719 | 533 | |
f96637be JP |
534 | cifs_dbg(FYI, "cifs_create parent inode = 0x%p name is: %s and dentry = 0x%p\n", |
535 | inode, direntry->d_name.name, direntry); | |
d2c12719 MS |
536 | |
537 | tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb)); | |
538 | rc = PTR_ERR(tlink); | |
539 | if (IS_ERR(tlink)) | |
6d5786a3 | 540 | goto out_free_xid; |
d2c12719 | 541 | |
25364138 PS |
542 | tcon = tlink_tcon(tlink); |
543 | server = tcon->ses->server; | |
b8c32dbb PS |
544 | |
545 | if (server->ops->new_lease_key) | |
546 | server->ops->new_lease_key(&fid); | |
547 | ||
548 | rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, | |
549 | &oplock, &fid, &created); | |
25364138 PS |
550 | if (!rc && server->ops->close) |
551 | server->ops->close(xid, tcon, &fid); | |
d2c12719 | 552 | |
7ffec372 | 553 | cifs_put_tlink(tlink); |
6d5786a3 PS |
554 | out_free_xid: |
555 | free_xid(xid); | |
1da177e4 LT |
556 | return rc; |
557 | } | |
558 | ||
1a67aafb | 559 | int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode, |
5fdae1f6 | 560 | dev_t device_number) |
1da177e4 LT |
561 | { |
562 | int rc = -EPERM; | |
6d5786a3 | 563 | unsigned int xid; |
3d3ea8e6 | 564 | int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL; |
1da177e4 | 565 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 566 | struct tcon_link *tlink; |
96daf2b0 | 567 | struct cifs_tcon *pTcon; |
fa2989f4 | 568 | struct cifs_io_parms io_parms; |
1da177e4 | 569 | char *full_path = NULL; |
fb8c4b14 | 570 | struct inode *newinode = NULL; |
5d9ac7fd JL |
571 | int oplock = 0; |
572 | u16 fileHandle; | |
573 | FILE_ALL_INFO *buf = NULL; | |
574 | unsigned int bytes_written; | |
575 | struct win_dev *pdev; | |
1da177e4 LT |
576 | |
577 | if (!old_valid_dev(device_number)) | |
578 | return -EINVAL; | |
579 | ||
1da177e4 | 580 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
581 | tlink = cifs_sb_tlink(cifs_sb); |
582 | if (IS_ERR(tlink)) | |
583 | return PTR_ERR(tlink); | |
584 | ||
585 | pTcon = tlink_tcon(tlink); | |
586 | ||
6d5786a3 | 587 | xid = get_xid(); |
1da177e4 | 588 | |
1da177e4 | 589 | full_path = build_path_from_dentry(direntry); |
5d9ac7fd | 590 | if (full_path == NULL) { |
1da177e4 | 591 | rc = -ENOMEM; |
5d9ac7fd JL |
592 | goto mknod_out; |
593 | } | |
594 | ||
595 | if (pTcon->unix_ext) { | |
4e1e7fb9 | 596 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 597 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
598 | .ctime = NO_CHANGE_64, |
599 | .atime = NO_CHANGE_64, | |
600 | .mtime = NO_CHANGE_64, | |
601 | .device = device_number, | |
602 | }; | |
5fdae1f6 | 603 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
49418b2c EB |
604 | args.uid = current_fsuid(); |
605 | args.gid = current_fsgid(); | |
1da177e4 | 606 | } else { |
49418b2c EB |
607 | args.uid = INVALID_UID; /* no change */ |
608 | args.gid = INVALID_GID; /* no change */ | |
1da177e4 | 609 | } |
01ea95e3 JL |
610 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
611 | cifs_sb->local_nls, | |
612 | cifs_sb->mnt_cifs_flags & | |
613 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5d9ac7fd JL |
614 | if (rc) |
615 | goto mknod_out; | |
1da177e4 | 616 | |
5d9ac7fd | 617 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 618 | inode->i_sb, xid); |
eda3c029 | 619 | |
5d9ac7fd JL |
620 | if (rc == 0) |
621 | d_instantiate(direntry, newinode); | |
622 | goto mknod_out; | |
1da177e4 LT |
623 | } |
624 | ||
5d9ac7fd JL |
625 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) |
626 | goto mknod_out; | |
627 | ||
628 | ||
f96637be | 629 | cifs_dbg(FYI, "sfu compat create special file\n"); |
5d9ac7fd JL |
630 | |
631 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
632 | if (buf == NULL) { | |
633 | kfree(full_path); | |
634 | rc = -ENOMEM; | |
6d5786a3 | 635 | free_xid(xid); |
5d9ac7fd JL |
636 | return rc; |
637 | } | |
638 | ||
3d3ea8e6 SP |
639 | if (backup_cred(cifs_sb)) |
640 | create_options |= CREATE_OPEN_BACKUP_INTENT; | |
641 | ||
5d9ac7fd | 642 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, |
3d3ea8e6 | 643 | GENERIC_WRITE, create_options, |
5d9ac7fd JL |
644 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
645 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
646 | if (rc) | |
647 | goto mknod_out; | |
648 | ||
649 | /* BB Do not bother to decode buf since no local inode yet to put | |
650 | * timestamps in, but we can reuse it safely */ | |
651 | ||
652 | pdev = (struct win_dev *)buf; | |
fa2989f4 PS |
653 | io_parms.netfid = fileHandle; |
654 | io_parms.pid = current->tgid; | |
655 | io_parms.tcon = pTcon; | |
656 | io_parms.offset = 0; | |
657 | io_parms.length = sizeof(struct win_dev); | |
5d9ac7fd JL |
658 | if (S_ISCHR(mode)) { |
659 | memcpy(pdev->type, "IntxCHR", 8); | |
660 | pdev->major = | |
661 | cpu_to_le64(MAJOR(device_number)); | |
662 | pdev->minor = | |
663 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
664 | rc = CIFSSMBWrite(xid, &io_parms, |
665 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
666 | NULL, 0); |
667 | } else if (S_ISBLK(mode)) { | |
668 | memcpy(pdev->type, "IntxBLK", 8); | |
669 | pdev->major = | |
670 | cpu_to_le64(MAJOR(device_number)); | |
671 | pdev->minor = | |
672 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
673 | rc = CIFSSMBWrite(xid, &io_parms, |
674 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
675 | NULL, 0); |
676 | } /* else if (S_ISFIFO) */ | |
677 | CIFSSMBClose(xid, pTcon, fileHandle); | |
678 | d_drop(direntry); | |
679 | ||
680 | /* FIXME: add code here to set EAs */ | |
681 | ||
682 | mknod_out: | |
d14537f1 | 683 | kfree(full_path); |
5d9ac7fd | 684 | kfree(buf); |
6d5786a3 | 685 | free_xid(xid); |
7ffec372 | 686 | cifs_put_tlink(tlink); |
1da177e4 LT |
687 | return rc; |
688 | } | |
689 | ||
1da177e4 | 690 | struct dentry * |
5fdae1f6 | 691 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
00cd8dd3 | 692 | unsigned int flags) |
1da177e4 | 693 | { |
6d5786a3 | 694 | unsigned int xid; |
1da177e4 LT |
695 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ |
696 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 697 | struct tcon_link *tlink; |
96daf2b0 | 698 | struct cifs_tcon *pTcon; |
1da177e4 LT |
699 | struct inode *newInode = NULL; |
700 | char *full_path = NULL; | |
701 | ||
6d5786a3 | 702 | xid = get_xid(); |
1da177e4 | 703 | |
f96637be JP |
704 | cifs_dbg(FYI, "parent inode = 0x%p name is: %s and dentry = 0x%p\n", |
705 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 706 | |
1da177e4 LT |
707 | /* check whether path exists */ |
708 | ||
709 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
7ffec372 JL |
710 | tlink = cifs_sb_tlink(cifs_sb); |
711 | if (IS_ERR(tlink)) { | |
6d5786a3 | 712 | free_xid(xid); |
7ffec372 JL |
713 | return (struct dentry *)tlink; |
714 | } | |
715 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 716 | |
d2c12719 MS |
717 | rc = check_name(direntry); |
718 | if (rc) | |
7ffec372 | 719 | goto lookup_out; |
5ddf1e0f | 720 | |
1da177e4 LT |
721 | /* can not grab the rename sem here since it would |
722 | deadlock in the cases (beginning of sys_rename itself) | |
723 | in which we already have the sb rename sem */ | |
724 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 725 | if (full_path == NULL) { |
7ffec372 JL |
726 | rc = -ENOMEM; |
727 | goto lookup_out; | |
1da177e4 LT |
728 | } |
729 | ||
730 | if (direntry->d_inode != NULL) { | |
f96637be | 731 | cifs_dbg(FYI, "non-NULL inode in lookup\n"); |
1da177e4 | 732 | } else { |
f96637be | 733 | cifs_dbg(FYI, "NULL inode in lookup\n"); |
1da177e4 | 734 | } |
f96637be JP |
735 | cifs_dbg(FYI, "Full path: %s inode = 0x%p\n", |
736 | full_path, direntry->d_inode); | |
1da177e4 | 737 | |
a6ce4932 | 738 | if (pTcon->unix_ext) { |
d2c12719 MS |
739 | rc = cifs_get_inode_info_unix(&newInode, full_path, |
740 | parent_dir_inode->i_sb, xid); | |
741 | } else { | |
1da177e4 | 742 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 743 | parent_dir_inode->i_sb, xid, NULL); |
d2c12719 | 744 | } |
1da177e4 LT |
745 | |
746 | if ((rc == 0) && (newInode != NULL)) { | |
1da177e4 | 747 | d_add(direntry, newInode); |
5fdae1f6 | 748 | /* since paths are not looked up by component - the parent |
3abb9272 | 749 | directories are presumed to be good here */ |
1da177e4 LT |
750 | renew_parental_timestamps(direntry); |
751 | ||
752 | } else if (rc == -ENOENT) { | |
753 | rc = 0; | |
3abb9272 | 754 | direntry->d_time = jiffies; |
1da177e4 | 755 | d_add(direntry, NULL); |
5fdae1f6 SF |
756 | /* if it was once a directory (but how can we tell?) we could do |
757 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 758 | } else if (rc != -EACCES) { |
f96637be | 759 | cifs_dbg(VFS, "Unexpected lookup error %d\n", rc); |
ed2b9170 SF |
760 | /* We special case check for Access Denied - since that |
761 | is a common return code */ | |
1da177e4 LT |
762 | } |
763 | ||
2422f676 | 764 | lookup_out: |
d14537f1 | 765 | kfree(full_path); |
7ffec372 | 766 | cifs_put_tlink(tlink); |
6d5786a3 | 767 | free_xid(xid); |
1da177e4 LT |
768 | return ERR_PTR(rc); |
769 | } | |
770 | ||
1da177e4 | 771 | static int |
0b728e19 | 772 | cifs_d_revalidate(struct dentry *direntry, unsigned int flags) |
1da177e4 | 773 | { |
0b728e19 | 774 | if (flags & LOOKUP_RCU) |
34286d66 NP |
775 | return -ECHILD; |
776 | ||
1da177e4 | 777 | if (direntry->d_inode) { |
df2cf170 | 778 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 779 | return 0; |
ad4778fb GF |
780 | else { |
781 | /* | |
936ad909 IK |
782 | * If the inode wasn't known to be a dfs entry when |
783 | * the dentry was instantiated, such as when created | |
784 | * via ->readdir(), it needs to be set now since the | |
785 | * attributes will have been updated by | |
786 | * cifs_revalidate_dentry(). | |
ad4778fb | 787 | */ |
936ad909 IK |
788 | if (IS_AUTOMOUNT(direntry->d_inode) && |
789 | !(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) { | |
790 | spin_lock(&direntry->d_lock); | |
791 | direntry->d_flags |= DCACHE_NEED_AUTOMOUNT; | |
792 | spin_unlock(&direntry->d_lock); | |
793 | } | |
794 | ||
262f86ad | 795 | return 1; |
ad4778fb | 796 | } |
1da177e4 LT |
797 | } |
798 | ||
262f86ad NP |
799 | /* |
800 | * This may be nfsd (or something), anyway, we can't see the | |
801 | * intent of this. So, since this can be for creation, drop it. | |
802 | */ | |
0b728e19 | 803 | if (!flags) |
262f86ad NP |
804 | return 0; |
805 | ||
806 | /* | |
807 | * Drop the negative dentry, in order to make sure to use the | |
808 | * case sensitive name which is specified by user if this is | |
809 | * for creation. | |
810 | */ | |
0b728e19 | 811 | if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) |
407938e7 | 812 | return 0; |
262f86ad NP |
813 | |
814 | if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) | |
815 | return 0; | |
816 | ||
817 | return 1; | |
1da177e4 LT |
818 | } |
819 | ||
820 | /* static int cifs_d_delete(struct dentry *direntry) | |
821 | { | |
822 | int rc = 0; | |
823 | ||
f96637be | 824 | cifs_dbg(FYI, "In cifs d_delete, name = %s\n", direntry->d_name.name); |
1da177e4 LT |
825 | |
826 | return rc; | |
827 | } */ | |
828 | ||
4fd03e84 | 829 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 830 | .d_revalidate = cifs_d_revalidate, |
01c64fea | 831 | .d_automount = cifs_dfs_d_automount, |
5fdae1f6 | 832 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 833 | }; |
b92327fe | 834 | |
da53be12 | 835 | static int cifs_ci_hash(const struct dentry *dentry, struct qstr *q) |
b92327fe | 836 | { |
b1e6a015 | 837 | struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; |
b92327fe | 838 | unsigned long hash; |
ec71e0e1 JL |
839 | wchar_t c; |
840 | int i, charlen; | |
b92327fe SF |
841 | |
842 | hash = init_name_hash(); | |
ec71e0e1 JL |
843 | for (i = 0; i < q->len; i += charlen) { |
844 | charlen = codepage->char2uni(&q->name[i], q->len - i, &c); | |
845 | /* error out if we can't convert the character */ | |
846 | if (unlikely(charlen < 0)) | |
847 | return charlen; | |
848 | hash = partial_name_hash(cifs_toupper(c), hash); | |
849 | } | |
b92327fe SF |
850 | q->hash = end_name_hash(hash); |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
da53be12 | 855 | static int cifs_ci_compare(const struct dentry *parent, const struct dentry *dentry, |
621e155a | 856 | unsigned int len, const char *str, const struct qstr *name) |
b92327fe | 857 | { |
da53be12 | 858 | struct nls_table *codepage = CIFS_SB(parent->d_sb)->local_nls; |
ec71e0e1 JL |
859 | wchar_t c1, c2; |
860 | int i, l1, l2; | |
b92327fe | 861 | |
ec71e0e1 JL |
862 | /* |
863 | * We make the assumption here that uppercase characters in the local | |
864 | * codepage are always the same length as their lowercase counterparts. | |
865 | * | |
866 | * If that's ever not the case, then this will fail to match it. | |
867 | */ | |
868 | if (name->len != len) | |
869 | return 1; | |
870 | ||
871 | for (i = 0; i < len; i += l1) { | |
872 | /* Convert characters in both strings to UTF-16. */ | |
873 | l1 = codepage->char2uni(&str[i], len - i, &c1); | |
874 | l2 = codepage->char2uni(&name->name[i], name->len - i, &c2); | |
875 | ||
876 | /* | |
877 | * If we can't convert either character, just declare it to | |
878 | * be 1 byte long and compare the original byte. | |
879 | */ | |
880 | if (unlikely(l1 < 0 && l2 < 0)) { | |
881 | if (str[i] != name->name[i]) | |
882 | return 1; | |
883 | l1 = 1; | |
884 | continue; | |
885 | } | |
886 | ||
887 | /* | |
888 | * Here, we again ass|u|me that upper/lowercase versions of | |
889 | * a character are the same length in the local NLS. | |
890 | */ | |
891 | if (l1 != l2) | |
892 | return 1; | |
893 | ||
894 | /* Now compare uppercase versions of these characters */ | |
895 | if (cifs_toupper(c1) != cifs_toupper(c2)) | |
896 | return 1; | |
897 | } | |
898 | ||
899 | return 0; | |
b92327fe SF |
900 | } |
901 | ||
4fd03e84 | 902 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
903 | .d_revalidate = cifs_d_revalidate, |
904 | .d_hash = cifs_ci_hash, | |
905 | .d_compare = cifs_ci_compare, | |
01c64fea | 906 | .d_automount = cifs_dfs_d_automount, |
b92327fe | 907 | }; |