Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/dir.c | |
3 | * | |
4 | * vfs operations that deal with dentries | |
5fdae1f6 | 5 | * |
c3b2a0c6 | 6 | * Copyright (C) International Business Machines Corp., 2002,2009 |
1da177e4 LT |
7 | * Author(s): Steve French (sfrench@us.ibm.com) |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | #include <linux/fs.h> | |
24 | #include <linux/stat.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/namei.h> | |
3bc303c2 | 27 | #include <linux/mount.h> |
6ca9f3ba | 28 | #include <linux/file.h> |
1da177e4 LT |
29 | #include "cifsfs.h" |
30 | #include "cifspdu.h" | |
31 | #include "cifsglob.h" | |
32 | #include "cifsproto.h" | |
33 | #include "cifs_debug.h" | |
34 | #include "cifs_fs_sb.h" | |
35 | ||
99ee4dbd | 36 | static void |
1da177e4 LT |
37 | renew_parental_timestamps(struct dentry *direntry) |
38 | { | |
5fdae1f6 SF |
39 | /* BB check if there is a way to get the kernel to do this or if we |
40 | really need this */ | |
1da177e4 LT |
41 | do { |
42 | direntry->d_time = jiffies; | |
43 | direntry = direntry->d_parent; | |
5fdae1f6 | 44 | } while (!IS_ROOT(direntry)); |
1da177e4 LT |
45 | } |
46 | ||
47 | /* Note: caller must free return buffer */ | |
48 | char * | |
49 | build_path_from_dentry(struct dentry *direntry) | |
50 | { | |
51 | struct dentry *temp; | |
2fe87f02 | 52 | int namelen; |
646dd539 | 53 | int dfsplen; |
1da177e4 | 54 | char *full_path; |
88274815 | 55 | char dirsep; |
0d424ad0 | 56 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 57 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
dc137bf5 | 58 | unsigned seq; |
1da177e4 | 59 | |
646dd539 | 60 | dirsep = CIFS_DIR_SEP(cifs_sb); |
0d424ad0 JL |
61 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
62 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
646dd539 SF |
63 | else |
64 | dfsplen = 0; | |
1da177e4 | 65 | cifs_bp_rename_retry: |
f87d39d9 | 66 | namelen = dfsplen; |
dc137bf5 AV |
67 | seq = read_seqbegin(&rename_lock); |
68 | rcu_read_lock(); | |
1da177e4 LT |
69 | for (temp = direntry; !IS_ROOT(temp);) { |
70 | namelen += (1 + temp->d_name.len); | |
71 | temp = temp->d_parent; | |
5fdae1f6 | 72 | if (temp == NULL) { |
b6b38f70 | 73 | cERROR(1, "corrupt dentry"); |
dc137bf5 | 74 | rcu_read_unlock(); |
1da177e4 LT |
75 | return NULL; |
76 | } | |
77 | } | |
dc137bf5 | 78 | rcu_read_unlock(); |
1da177e4 LT |
79 | |
80 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 81 | if (full_path == NULL) |
1da177e4 LT |
82 | return full_path; |
83 | full_path[namelen] = 0; /* trailing null */ | |
dc137bf5 | 84 | rcu_read_lock(); |
1da177e4 | 85 | for (temp = direntry; !IS_ROOT(temp);) { |
dc137bf5 | 86 | spin_lock(&temp->d_lock); |
1da177e4 LT |
87 | namelen -= 1 + temp->d_name.len; |
88 | if (namelen < 0) { | |
dc137bf5 | 89 | spin_unlock(&temp->d_lock); |
1da177e4 LT |
90 | break; |
91 | } else { | |
7f57356b | 92 | full_path[namelen] = dirsep; |
1da177e4 LT |
93 | strncpy(full_path + namelen + 1, temp->d_name.name, |
94 | temp->d_name.len); | |
b6b38f70 | 95 | cFYI(0, "name: %s", full_path + namelen); |
1da177e4 | 96 | } |
dc137bf5 | 97 | spin_unlock(&temp->d_lock); |
1da177e4 | 98 | temp = temp->d_parent; |
5fdae1f6 | 99 | if (temp == NULL) { |
b6b38f70 | 100 | cERROR(1, "corrupt dentry"); |
dc137bf5 | 101 | rcu_read_unlock(); |
1da177e4 LT |
102 | kfree(full_path); |
103 | return NULL; | |
104 | } | |
105 | } | |
dc137bf5 AV |
106 | rcu_read_unlock(); |
107 | if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) { | |
fa71f447 JL |
108 | cFYI(1, "did not end path lookup where expected. namelen=%d " |
109 | "dfsplen=%d", namelen, dfsplen); | |
5fdae1f6 | 110 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
111 | of one of the parent directories (we can not lock the dentries |
112 | above us to prevent this, but retrying should be harmless) */ | |
113 | kfree(full_path); | |
1da177e4 LT |
114 | goto cifs_bp_rename_retry; |
115 | } | |
2fe87f02 SF |
116 | /* DIR_SEP already set for byte 0 / vs \ but not for |
117 | subsequent slashes in prepath which currently must | |
118 | be entered the right way - not sure if there is an alternative | |
119 | since the '\' is a valid posix character so we can not switch | |
120 | those safely to '/' if any are found in the middle of the prepath */ | |
121 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
646dd539 SF |
122 | |
123 | if (dfsplen) { | |
0d424ad0 | 124 | strncpy(full_path, tcon->treeName, dfsplen); |
646dd539 SF |
125 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
126 | int i; | |
127 | for (i = 0; i < dfsplen; i++) { | |
128 | if (full_path[i] == '\\') | |
129 | full_path[i] = '/'; | |
130 | } | |
131 | } | |
132 | } | |
1da177e4 LT |
133 | return full_path; |
134 | } | |
135 | ||
d2c12719 MS |
136 | /* |
137 | * Don't allow the separator character in a path component. | |
138 | * The VFS will not allow "/", but "\" is allowed by posix. | |
139 | */ | |
140 | static int | |
141 | check_name(struct dentry *direntry) | |
142 | { | |
143 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); | |
144 | int i; | |
145 | ||
146 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
147 | for (i = 0; i < direntry->d_name.len; i++) { | |
148 | if (direntry->d_name.name[i] == '\\') { | |
149 | cFYI(1, "Invalid file name"); | |
150 | return -EINVAL; | |
151 | } | |
152 | } | |
153 | } | |
154 | return 0; | |
155 | } | |
156 | ||
157 | ||
3979877e | 158 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 | 159 | |
d2c12719 MS |
160 | static int cifs_do_create(struct inode *inode, struct dentry *direntry, |
161 | int xid, struct tcon_link *tlink, unsigned oflags, | |
162 | umode_t mode, __u32 *oplock, __u16 *fileHandle, | |
47237687 | 163 | int *created) |
1da177e4 LT |
164 | { |
165 | int rc = -ENOENT; | |
67750fb9 | 166 | int create_options = CREATE_NOT_DIR; |
d2c12719 MS |
167 | int desiredAccess; |
168 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
169 | struct cifs_tcon *tcon = tlink_tcon(tlink); | |
1da177e4 | 170 | char *full_path = NULL; |
fb8c4b14 | 171 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 172 | struct inode *newinode = NULL; |
d2c12719 | 173 | int disposition; |
1da177e4 | 174 | |
d2c12719 | 175 | *oplock = 0; |
10b9b98e | 176 | if (tcon->ses->server->oplocks) |
d2c12719 | 177 | *oplock = REQ_OPLOCK; |
c3b2a0c6 | 178 | |
7ffec372 JL |
179 | full_path = build_path_from_dentry(direntry); |
180 | if (full_path == NULL) { | |
181 | rc = -ENOMEM; | |
d2c12719 | 182 | goto out; |
7ffec372 JL |
183 | } |
184 | ||
c3b2a0c6 | 185 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && |
d2c12719 | 186 | !tcon->broken_posix_open && |
c3b2a0c6 SF |
187 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
188 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
fa588e0c | 189 | rc = cifs_posix_open(full_path, &newinode, |
d2c12719 MS |
190 | inode->i_sb, mode, oflags, oplock, fileHandle, xid); |
191 | switch (rc) { | |
192 | case 0: | |
193 | if (newinode == NULL) { | |
194 | /* query inode info */ | |
90e4ee5d | 195 | goto cifs_create_get_file_info; |
d2c12719 MS |
196 | } |
197 | ||
198 | if (!S_ISREG(newinode->i_mode)) { | |
199 | /* | |
200 | * The server may allow us to open things like | |
201 | * FIFOs, but the client isn't set up to deal | |
202 | * with that. If it's not a regular file, just | |
203 | * close it and proceed as if it were a normal | |
204 | * lookup. | |
205 | */ | |
206 | CIFSSMBClose(xid, tcon, *fileHandle); | |
207 | goto cifs_create_get_file_info; | |
208 | } | |
209 | /* success, no need to query */ | |
210 | goto cifs_create_set_dentry; | |
211 | ||
212 | case -ENOENT: | |
213 | goto cifs_create_get_file_info; | |
214 | ||
215 | case -EIO: | |
216 | case -EINVAL: | |
217 | /* | |
218 | * EIO could indicate that (posix open) operation is not | |
219 | * supported, despite what server claimed in capability | |
220 | * negotiation. | |
221 | * | |
222 | * POSIX open in samba versions 3.3.1 and earlier could | |
223 | * incorrectly fail with invalid parameter. | |
224 | */ | |
225 | tcon->broken_posix_open = true; | |
226 | break; | |
227 | ||
228 | case -EREMOTE: | |
229 | case -EOPNOTSUPP: | |
230 | /* | |
231 | * EREMOTE indicates DFS junction, which is not handled | |
232 | * in posix open. If either that or op not supported | |
233 | * returned, follow the normal lookup. | |
234 | */ | |
235 | break; | |
e08fc045 | 236 | |
d2c12719 MS |
237 | default: |
238 | goto out; | |
239 | } | |
240 | /* | |
241 | * fallthrough to retry, using older open call, this is case | |
242 | * where server does not support this SMB level, and falsely | |
243 | * claims capability (also get here for DFS case which should be | |
244 | * rare for path not covered on files) | |
245 | */ | |
1da177e4 LT |
246 | } |
247 | ||
d2c12719 MS |
248 | desiredAccess = 0; |
249 | if (OPEN_FMODE(oflags) & FMODE_READ) | |
250 | desiredAccess |= GENERIC_READ; /* is this too little? */ | |
251 | if (OPEN_FMODE(oflags) & FMODE_WRITE) | |
252 | desiredAccess |= GENERIC_WRITE; | |
253 | ||
254 | disposition = FILE_OVERWRITE_IF; | |
255 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) | |
256 | disposition = FILE_CREATE; | |
257 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) | |
258 | disposition = FILE_OVERWRITE_IF; | |
259 | else if ((oflags & O_CREAT) == O_CREAT) | |
260 | disposition = FILE_OPEN_IF; | |
261 | else | |
262 | cFYI(1, "Create flag not set in create function"); | |
263 | ||
5fdae1f6 SF |
264 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
265 | ACLs */ | |
1da177e4 | 266 | |
5fdae1f6 SF |
267 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
268 | if (buf == NULL) { | |
232341ba | 269 | rc = -ENOMEM; |
d2c12719 | 270 | goto out; |
1da177e4 | 271 | } |
67750fb9 | 272 | |
67750fb9 JL |
273 | /* |
274 | * if we're not using unix extensions, see if we need to set | |
275 | * ATTR_READONLY on the create call | |
276 | */ | |
f818dd55 | 277 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
278 | create_options |= CREATE_OPTION_READONLY; |
279 | ||
3d3ea8e6 SP |
280 | if (backup_cred(cifs_sb)) |
281 | create_options |= CREATE_OPEN_BACKUP_INTENT; | |
282 | ||
a6e8a845 | 283 | if (tcon->ses->capabilities & CAP_NT_SMBS) |
f818dd55 | 284 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
67750fb9 | 285 | desiredAccess, create_options, |
d2c12719 | 286 | fileHandle, oplock, buf, cifs_sb->local_nls, |
737b758c | 287 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
5bafd765 SF |
288 | else |
289 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
290 | ||
5fdae1f6 | 291 | if (rc == -EIO) { |
a9d02ad4 | 292 | /* old server, retry the open legacy style */ |
f818dd55 | 293 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
67750fb9 | 294 | desiredAccess, create_options, |
d2c12719 | 295 | fileHandle, oplock, buf, cifs_sb->local_nls, |
a9d02ad4 | 296 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
5fdae1f6 | 297 | } |
1da177e4 | 298 | if (rc) { |
b6b38f70 | 299 | cFYI(1, "cifs_create returned 0x%x", rc); |
d2c12719 | 300 | goto out; |
c3b2a0c6 SF |
301 | } |
302 | ||
303 | /* If Open reported that we actually created a file | |
304 | then we now have to set the mode if possible */ | |
d2c12719 | 305 | if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) { |
c3b2a0c6 | 306 | struct cifs_unix_set_info_args args = { |
4e1e7fb9 JL |
307 | .mode = mode, |
308 | .ctime = NO_CHANGE_64, | |
309 | .atime = NO_CHANGE_64, | |
310 | .mtime = NO_CHANGE_64, | |
311 | .device = 0, | |
c3b2a0c6 SF |
312 | }; |
313 | ||
47237687 | 314 | *created |= FILE_CREATED; |
c3b2a0c6 SF |
315 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
316 | args.uid = (__u64) current_fsuid(); | |
317 | if (inode->i_mode & S_ISGID) | |
318 | args.gid = (__u64) inode->i_gid; | |
319 | else | |
320 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 321 | } else { |
c3b2a0c6 SF |
322 | args.uid = NO_CHANGE_64; |
323 | args.gid = NO_CHANGE_64; | |
1da177e4 | 324 | } |
d2c12719 | 325 | CIFSSMBUnixSetFileInfo(xid, tcon, &args, *fileHandle, |
d44a9fe2 | 326 | current->tgid); |
c3b2a0c6 SF |
327 | } else { |
328 | /* BB implement mode setting via Windows security | |
329 | descriptors e.g. */ | |
330 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ | |
331 | ||
332 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
333 | } | |
1da177e4 | 334 | |
c3b2a0c6 SF |
335 | cifs_create_get_file_info: |
336 | /* server might mask mode so we have to query for it */ | |
337 | if (tcon->unix_ext) | |
338 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
339 | inode->i_sb, xid); | |
340 | else { | |
341 | rc = cifs_get_inode_info(&newinode, full_path, buf, | |
d2c12719 | 342 | inode->i_sb, xid, fileHandle); |
c3b2a0c6 SF |
343 | if (newinode) { |
344 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
345 | newinode->i_mode = mode; | |
d2c12719 | 346 | if ((*oplock & CIFS_CREATE_ACTION) && |
c3b2a0c6 SF |
347 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { |
348 | newinode->i_uid = current_fsuid(); | |
349 | if (inode->i_mode & S_ISGID) | |
350 | newinode->i_gid = inode->i_gid; | |
351 | else | |
352 | newinode->i_gid = current_fsgid(); | |
6473a559 | 353 | } |
1da177e4 | 354 | } |
c3b2a0c6 | 355 | } |
1da177e4 | 356 | |
c3b2a0c6 | 357 | cifs_create_set_dentry: |
d2c12719 | 358 | if (rc != 0) { |
b6b38f70 | 359 | cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
d2c12719 MS |
360 | goto out; |
361 | } | |
362 | d_drop(direntry); | |
363 | d_add(direntry, newinode); | |
c3b2a0c6 | 364 | |
d2c12719 MS |
365 | /* ENOENT for create? How weird... */ |
366 | rc = -ENOENT; | |
367 | if (!newinode) { | |
368 | CIFSSMBClose(xid, tcon, *fileHandle); | |
369 | goto out; | |
370 | } | |
371 | rc = 0; | |
6ca9f3ba | 372 | |
d2c12719 MS |
373 | out: |
374 | kfree(buf); | |
375 | kfree(full_path); | |
376 | return rc; | |
377 | } | |
6ca9f3ba | 378 | |
d9585277 | 379 | int |
d2c12719 | 380 | cifs_atomic_open(struct inode *inode, struct dentry *direntry, |
30d90494 | 381 | struct file *file, unsigned oflags, umode_t mode, |
47237687 | 382 | int *opened) |
d2c12719 MS |
383 | { |
384 | int rc; | |
385 | int xid; | |
386 | struct tcon_link *tlink; | |
387 | struct cifs_tcon *tcon; | |
388 | __u16 fileHandle; | |
389 | __u32 oplock; | |
390 | struct file *filp; | |
391 | struct cifsFileInfo *pfile_info; | |
392 | ||
393 | /* Posix open is only called (at lookup time) for file create now. For | |
394 | * opens (rather than creates), because we do not know if it is a file | |
395 | * or directory yet, and current Samba no longer allows us to do posix | |
396 | * open on dirs, we could end up wasting an open call on what turns out | |
397 | * to be a dir. For file opens, we wait to call posix open till | |
398 | * cifs_open. It could be added to atomic_open in the future but the | |
399 | * performance tradeoff of the extra network request when EISDIR or | |
400 | * EACCES is returned would have to be weighed against the 50% reduction | |
401 | * in network traffic in the other paths. | |
402 | */ | |
403 | if (!(oflags & O_CREAT)) { | |
00cd8dd3 | 404 | struct dentry *res = cifs_lookup(inode, direntry, 0); |
d2c12719 | 405 | if (IS_ERR(res)) |
d9585277 | 406 | return PTR_ERR(res); |
d2c12719 | 407 | |
e45198a6 | 408 | return finish_no_open(file, res); |
d2c12719 MS |
409 | } |
410 | ||
411 | rc = check_name(direntry); | |
412 | if (rc) | |
d9585277 | 413 | return rc; |
d2c12719 MS |
414 | |
415 | xid = GetXid(); | |
416 | ||
417 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", | |
418 | inode, direntry->d_name.name, direntry); | |
419 | ||
420 | tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb)); | |
421 | filp = ERR_CAST(tlink); | |
422 | if (IS_ERR(tlink)) | |
423 | goto free_xid; | |
424 | ||
425 | tcon = tlink_tcon(tlink); | |
426 | ||
427 | rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, | |
47237687 | 428 | &oplock, &fileHandle, opened); |
d2c12719 | 429 | |
d9585277 | 430 | if (rc) |
d2c12719 | 431 | goto out; |
d2c12719 | 432 | |
30d90494 AV |
433 | rc = finish_open(file, direntry, generic_file_open, opened); |
434 | if (rc) { | |
2422f676 | 435 | CIFSSMBClose(xid, tcon, fileHandle); |
d2c12719 | 436 | goto out; |
5fdae1f6 | 437 | } |
2422f676 | 438 | |
d2c12719 MS |
439 | pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock); |
440 | if (pfile_info == NULL) { | |
441 | CIFSSMBClose(xid, tcon, fileHandle); | |
442 | fput(filp); | |
d9585277 | 443 | rc = -ENOMEM; |
d2c12719 MS |
444 | } |
445 | ||
446 | out: | |
447 | cifs_put_tlink(tlink); | |
448 | free_xid: | |
449 | FreeXid(xid); | |
d9585277 | 450 | return rc; |
d2c12719 MS |
451 | } |
452 | ||
453 | int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode, | |
ebfc3b49 | 454 | bool excl) |
d2c12719 MS |
455 | { |
456 | int rc; | |
457 | int xid = GetXid(); | |
458 | /* | |
459 | * BB below access is probably too much for mknod to request | |
460 | * but we have to do query and setpathinfo so requesting | |
461 | * less could fail (unless we want to request getatr and setatr | |
462 | * permissions (only). At least for POSIX we do not have to | |
463 | * request so much. | |
464 | */ | |
465 | unsigned oflags = O_EXCL | O_CREAT | O_RDWR; | |
466 | struct tcon_link *tlink; | |
467 | __u16 fileHandle; | |
468 | __u32 oplock; | |
47237687 | 469 | int created = FILE_CREATED; |
d2c12719 MS |
470 | |
471 | cFYI(1, "cifs_create parent inode = 0x%p name is: %s and dentry = 0x%p", | |
472 | inode, direntry->d_name.name, direntry); | |
473 | ||
474 | tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb)); | |
475 | rc = PTR_ERR(tlink); | |
476 | if (IS_ERR(tlink)) | |
477 | goto free_xid; | |
478 | ||
479 | rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode, | |
480 | &oplock, &fileHandle, &created); | |
481 | if (!rc) | |
482 | CIFSSMBClose(xid, tlink_tcon(tlink), fileHandle); | |
483 | ||
7ffec372 | 484 | cifs_put_tlink(tlink); |
d2c12719 | 485 | free_xid: |
1da177e4 | 486 | FreeXid(xid); |
d2c12719 | 487 | |
1da177e4 LT |
488 | return rc; |
489 | } | |
490 | ||
1a67aafb | 491 | int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode, |
5fdae1f6 | 492 | dev_t device_number) |
1da177e4 LT |
493 | { |
494 | int rc = -EPERM; | |
495 | int xid; | |
3d3ea8e6 | 496 | int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL; |
1da177e4 | 497 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 498 | struct tcon_link *tlink; |
96daf2b0 | 499 | struct cifs_tcon *pTcon; |
fa2989f4 | 500 | struct cifs_io_parms io_parms; |
1da177e4 | 501 | char *full_path = NULL; |
fb8c4b14 | 502 | struct inode *newinode = NULL; |
5d9ac7fd JL |
503 | int oplock = 0; |
504 | u16 fileHandle; | |
505 | FILE_ALL_INFO *buf = NULL; | |
506 | unsigned int bytes_written; | |
507 | struct win_dev *pdev; | |
1da177e4 LT |
508 | |
509 | if (!old_valid_dev(device_number)) | |
510 | return -EINVAL; | |
511 | ||
1da177e4 | 512 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
513 | tlink = cifs_sb_tlink(cifs_sb); |
514 | if (IS_ERR(tlink)) | |
515 | return PTR_ERR(tlink); | |
516 | ||
517 | pTcon = tlink_tcon(tlink); | |
518 | ||
519 | xid = GetXid(); | |
1da177e4 | 520 | |
1da177e4 | 521 | full_path = build_path_from_dentry(direntry); |
5d9ac7fd | 522 | if (full_path == NULL) { |
1da177e4 | 523 | rc = -ENOMEM; |
5d9ac7fd JL |
524 | goto mknod_out; |
525 | } | |
526 | ||
527 | if (pTcon->unix_ext) { | |
4e1e7fb9 | 528 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 529 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
530 | .ctime = NO_CHANGE_64, |
531 | .atime = NO_CHANGE_64, | |
532 | .mtime = NO_CHANGE_64, | |
533 | .device = device_number, | |
534 | }; | |
5fdae1f6 | 535 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
536 | args.uid = (__u64) current_fsuid(); |
537 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 538 | } else { |
4e1e7fb9 JL |
539 | args.uid = NO_CHANGE_64; |
540 | args.gid = NO_CHANGE_64; | |
1da177e4 | 541 | } |
01ea95e3 JL |
542 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
543 | cifs_sb->local_nls, | |
544 | cifs_sb->mnt_cifs_flags & | |
545 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5d9ac7fd JL |
546 | if (rc) |
547 | goto mknod_out; | |
1da177e4 | 548 | |
5d9ac7fd | 549 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 550 | inode->i_sb, xid); |
eda3c029 | 551 | |
5d9ac7fd JL |
552 | if (rc == 0) |
553 | d_instantiate(direntry, newinode); | |
554 | goto mknod_out; | |
1da177e4 LT |
555 | } |
556 | ||
5d9ac7fd JL |
557 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) |
558 | goto mknod_out; | |
559 | ||
560 | ||
561 | cFYI(1, "sfu compat create special file"); | |
562 | ||
563 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
564 | if (buf == NULL) { | |
565 | kfree(full_path); | |
566 | rc = -ENOMEM; | |
567 | FreeXid(xid); | |
568 | return rc; | |
569 | } | |
570 | ||
3d3ea8e6 SP |
571 | if (backup_cred(cifs_sb)) |
572 | create_options |= CREATE_OPEN_BACKUP_INTENT; | |
573 | ||
5d9ac7fd | 574 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, |
3d3ea8e6 | 575 | GENERIC_WRITE, create_options, |
5d9ac7fd JL |
576 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
577 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
578 | if (rc) | |
579 | goto mknod_out; | |
580 | ||
581 | /* BB Do not bother to decode buf since no local inode yet to put | |
582 | * timestamps in, but we can reuse it safely */ | |
583 | ||
584 | pdev = (struct win_dev *)buf; | |
fa2989f4 PS |
585 | io_parms.netfid = fileHandle; |
586 | io_parms.pid = current->tgid; | |
587 | io_parms.tcon = pTcon; | |
588 | io_parms.offset = 0; | |
589 | io_parms.length = sizeof(struct win_dev); | |
5d9ac7fd JL |
590 | if (S_ISCHR(mode)) { |
591 | memcpy(pdev->type, "IntxCHR", 8); | |
592 | pdev->major = | |
593 | cpu_to_le64(MAJOR(device_number)); | |
594 | pdev->minor = | |
595 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
596 | rc = CIFSSMBWrite(xid, &io_parms, |
597 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
598 | NULL, 0); |
599 | } else if (S_ISBLK(mode)) { | |
600 | memcpy(pdev->type, "IntxBLK", 8); | |
601 | pdev->major = | |
602 | cpu_to_le64(MAJOR(device_number)); | |
603 | pdev->minor = | |
604 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
605 | rc = CIFSSMBWrite(xid, &io_parms, |
606 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
607 | NULL, 0); |
608 | } /* else if (S_ISFIFO) */ | |
609 | CIFSSMBClose(xid, pTcon, fileHandle); | |
610 | d_drop(direntry); | |
611 | ||
612 | /* FIXME: add code here to set EAs */ | |
613 | ||
614 | mknod_out: | |
d14537f1 | 615 | kfree(full_path); |
5d9ac7fd | 616 | kfree(buf); |
1da177e4 | 617 | FreeXid(xid); |
7ffec372 | 618 | cifs_put_tlink(tlink); |
1da177e4 LT |
619 | return rc; |
620 | } | |
621 | ||
1da177e4 | 622 | struct dentry * |
5fdae1f6 | 623 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
00cd8dd3 | 624 | unsigned int flags) |
1da177e4 LT |
625 | { |
626 | int xid; | |
627 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
628 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 629 | struct tcon_link *tlink; |
96daf2b0 | 630 | struct cifs_tcon *pTcon; |
1da177e4 LT |
631 | struct inode *newInode = NULL; |
632 | char *full_path = NULL; | |
633 | ||
634 | xid = GetXid(); | |
635 | ||
b6b38f70 JP |
636 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", |
637 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 638 | |
1da177e4 LT |
639 | /* check whether path exists */ |
640 | ||
641 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
7ffec372 JL |
642 | tlink = cifs_sb_tlink(cifs_sb); |
643 | if (IS_ERR(tlink)) { | |
644 | FreeXid(xid); | |
645 | return (struct dentry *)tlink; | |
646 | } | |
647 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 648 | |
d2c12719 MS |
649 | rc = check_name(direntry); |
650 | if (rc) | |
7ffec372 | 651 | goto lookup_out; |
5ddf1e0f | 652 | |
1da177e4 LT |
653 | /* can not grab the rename sem here since it would |
654 | deadlock in the cases (beginning of sys_rename itself) | |
655 | in which we already have the sb rename sem */ | |
656 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 657 | if (full_path == NULL) { |
7ffec372 JL |
658 | rc = -ENOMEM; |
659 | goto lookup_out; | |
1da177e4 LT |
660 | } |
661 | ||
662 | if (direntry->d_inode != NULL) { | |
b6b38f70 | 663 | cFYI(1, "non-NULL inode in lookup"); |
1da177e4 | 664 | } else { |
b6b38f70 | 665 | cFYI(1, "NULL inode in lookup"); |
1da177e4 | 666 | } |
b6b38f70 | 667 | cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); |
1da177e4 | 668 | |
a6ce4932 | 669 | if (pTcon->unix_ext) { |
d2c12719 MS |
670 | rc = cifs_get_inode_info_unix(&newInode, full_path, |
671 | parent_dir_inode->i_sb, xid); | |
672 | } else { | |
1da177e4 | 673 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 674 | parent_dir_inode->i_sb, xid, NULL); |
d2c12719 | 675 | } |
1da177e4 LT |
676 | |
677 | if ((rc == 0) && (newInode != NULL)) { | |
1da177e4 | 678 | d_add(direntry, newInode); |
5fdae1f6 | 679 | /* since paths are not looked up by component - the parent |
3abb9272 | 680 | directories are presumed to be good here */ |
1da177e4 LT |
681 | renew_parental_timestamps(direntry); |
682 | ||
683 | } else if (rc == -ENOENT) { | |
684 | rc = 0; | |
3abb9272 | 685 | direntry->d_time = jiffies; |
1da177e4 | 686 | d_add(direntry, NULL); |
5fdae1f6 SF |
687 | /* if it was once a directory (but how can we tell?) we could do |
688 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 689 | } else if (rc != -EACCES) { |
b6b38f70 | 690 | cERROR(1, "Unexpected lookup error %d", rc); |
ed2b9170 SF |
691 | /* We special case check for Access Denied - since that |
692 | is a common return code */ | |
1da177e4 LT |
693 | } |
694 | ||
2422f676 | 695 | lookup_out: |
d14537f1 | 696 | kfree(full_path); |
7ffec372 | 697 | cifs_put_tlink(tlink); |
1da177e4 LT |
698 | FreeXid(xid); |
699 | return ERR_PTR(rc); | |
700 | } | |
701 | ||
1da177e4 | 702 | static int |
0b728e19 | 703 | cifs_d_revalidate(struct dentry *direntry, unsigned int flags) |
1da177e4 | 704 | { |
0b728e19 | 705 | if (flags & LOOKUP_RCU) |
34286d66 NP |
706 | return -ECHILD; |
707 | ||
1da177e4 | 708 | if (direntry->d_inode) { |
df2cf170 | 709 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 710 | return 0; |
ad4778fb GF |
711 | else { |
712 | /* | |
936ad909 IK |
713 | * If the inode wasn't known to be a dfs entry when |
714 | * the dentry was instantiated, such as when created | |
715 | * via ->readdir(), it needs to be set now since the | |
716 | * attributes will have been updated by | |
717 | * cifs_revalidate_dentry(). | |
ad4778fb | 718 | */ |
936ad909 IK |
719 | if (IS_AUTOMOUNT(direntry->d_inode) && |
720 | !(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) { | |
721 | spin_lock(&direntry->d_lock); | |
722 | direntry->d_flags |= DCACHE_NEED_AUTOMOUNT; | |
723 | spin_unlock(&direntry->d_lock); | |
724 | } | |
725 | ||
262f86ad | 726 | return 1; |
ad4778fb | 727 | } |
1da177e4 LT |
728 | } |
729 | ||
262f86ad NP |
730 | /* |
731 | * This may be nfsd (or something), anyway, we can't see the | |
732 | * intent of this. So, since this can be for creation, drop it. | |
733 | */ | |
0b728e19 | 734 | if (!flags) |
262f86ad NP |
735 | return 0; |
736 | ||
737 | /* | |
738 | * Drop the negative dentry, in order to make sure to use the | |
739 | * case sensitive name which is specified by user if this is | |
740 | * for creation. | |
741 | */ | |
0b728e19 | 742 | if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) |
407938e7 | 743 | return 0; |
262f86ad NP |
744 | |
745 | if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) | |
746 | return 0; | |
747 | ||
748 | return 1; | |
1da177e4 LT |
749 | } |
750 | ||
751 | /* static int cifs_d_delete(struct dentry *direntry) | |
752 | { | |
753 | int rc = 0; | |
754 | ||
b6b38f70 | 755 | cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
1da177e4 LT |
756 | |
757 | return rc; | |
758 | } */ | |
759 | ||
4fd03e84 | 760 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 761 | .d_revalidate = cifs_d_revalidate, |
01c64fea | 762 | .d_automount = cifs_dfs_d_automount, |
5fdae1f6 | 763 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 764 | }; |
b92327fe | 765 | |
b1e6a015 NP |
766 | static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, |
767 | struct qstr *q) | |
b92327fe | 768 | { |
b1e6a015 | 769 | struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; |
b92327fe SF |
770 | unsigned long hash; |
771 | int i; | |
772 | ||
773 | hash = init_name_hash(); | |
774 | for (i = 0; i < q->len; i++) | |
775 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
776 | hash); | |
777 | q->hash = end_name_hash(hash); | |
778 | ||
779 | return 0; | |
780 | } | |
781 | ||
621e155a NP |
782 | static int cifs_ci_compare(const struct dentry *parent, |
783 | const struct inode *pinode, | |
784 | const struct dentry *dentry, const struct inode *inode, | |
785 | unsigned int len, const char *str, const struct qstr *name) | |
b92327fe | 786 | { |
621e155a | 787 | struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; |
b92327fe | 788 | |
621e155a NP |
789 | if ((name->len == len) && |
790 | (nls_strnicmp(codepage, name->name, str, len) == 0)) | |
b92327fe | 791 | return 0; |
b92327fe SF |
792 | return 1; |
793 | } | |
794 | ||
4fd03e84 | 795 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
796 | .d_revalidate = cifs_d_revalidate, |
797 | .d_hash = cifs_ci_hash, | |
798 | .d_compare = cifs_ci_compare, | |
01c64fea | 799 | .d_automount = cifs_dfs_d_automount, |
b92327fe | 800 | }; |