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> | |
27 | #include "cifsfs.h" | |
28 | #include "cifspdu.h" | |
29 | #include "cifsglob.h" | |
30 | #include "cifsproto.h" | |
31 | #include "cifs_debug.h" | |
32 | #include "cifs_fs_sb.h" | |
33 | ||
99ee4dbd | 34 | static void |
1da177e4 LT |
35 | renew_parental_timestamps(struct dentry *direntry) |
36 | { | |
5fdae1f6 SF |
37 | /* BB check if there is a way to get the kernel to do this or if we |
38 | really need this */ | |
1da177e4 LT |
39 | do { |
40 | direntry->d_time = jiffies; | |
41 | direntry = direntry->d_parent; | |
5fdae1f6 | 42 | } while (!IS_ROOT(direntry)); |
1da177e4 LT |
43 | } |
44 | ||
45 | /* Note: caller must free return buffer */ | |
46 | char * | |
47 | build_path_from_dentry(struct dentry *direntry) | |
48 | { | |
49 | struct dentry *temp; | |
2fe87f02 SF |
50 | int namelen; |
51 | int pplen; | |
646dd539 | 52 | int dfsplen; |
1da177e4 | 53 | char *full_path; |
88274815 | 54 | char dirsep; |
646dd539 | 55 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 56 | |
5fdae1f6 | 57 | if (direntry == NULL) |
1da177e4 LT |
58 | return NULL; /* not much we can do if dentry is freed and |
59 | we need to reopen the file after it was closed implicitly | |
60 | when the server crashed */ | |
61 | ||
646dd539 SF |
62 | cifs_sb = CIFS_SB(direntry->d_sb); |
63 | dirsep = CIFS_DIR_SEP(cifs_sb); | |
64 | pplen = cifs_sb->prepathlen; | |
65 | if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS)) | |
66 | dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1); | |
67 | else | |
68 | dfsplen = 0; | |
1da177e4 | 69 | cifs_bp_rename_retry: |
646dd539 | 70 | namelen = pplen + dfsplen; |
1da177e4 LT |
71 | for (temp = direntry; !IS_ROOT(temp);) { |
72 | namelen += (1 + temp->d_name.len); | |
73 | temp = temp->d_parent; | |
5fdae1f6 SF |
74 | if (temp == NULL) { |
75 | cERROR(1, ("corrupt dentry")); | |
1da177e4 LT |
76 | return NULL; |
77 | } | |
78 | } | |
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 */ | |
1da177e4 LT |
84 | for (temp = direntry; !IS_ROOT(temp);) { |
85 | namelen -= 1 + temp->d_name.len; | |
86 | if (namelen < 0) { | |
87 | break; | |
88 | } else { | |
7f57356b | 89 | full_path[namelen] = dirsep; |
1da177e4 LT |
90 | strncpy(full_path + namelen + 1, temp->d_name.name, |
91 | temp->d_name.len); | |
2fe87f02 | 92 | cFYI(0, ("name: %s", full_path + namelen)); |
1da177e4 LT |
93 | } |
94 | temp = temp->d_parent; | |
5fdae1f6 SF |
95 | if (temp == NULL) { |
96 | cERROR(1, ("corrupt dentry")); | |
1da177e4 LT |
97 | kfree(full_path); |
98 | return NULL; | |
99 | } | |
100 | } | |
646dd539 | 101 | if (namelen != pplen + dfsplen) { |
1da177e4 | 102 | cERROR(1, |
2fe87f02 | 103 | ("did not end path lookup where expected namelen is %d", |
1da177e4 | 104 | namelen)); |
5fdae1f6 | 105 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
106 | of one of the parent directories (we can not lock the dentries |
107 | above us to prevent this, but retrying should be harmless) */ | |
108 | kfree(full_path); | |
1da177e4 LT |
109 | goto cifs_bp_rename_retry; |
110 | } | |
2fe87f02 SF |
111 | /* DIR_SEP already set for byte 0 / vs \ but not for |
112 | subsequent slashes in prepath which currently must | |
113 | be entered the right way - not sure if there is an alternative | |
114 | since the '\' is a valid posix character so we can not switch | |
115 | those safely to '/' if any are found in the middle of the prepath */ | |
116 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
646dd539 SF |
117 | |
118 | if (dfsplen) { | |
119 | strncpy(full_path, cifs_sb->tcon->treeName, dfsplen); | |
120 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
121 | int i; | |
122 | for (i = 0; i < dfsplen; i++) { | |
123 | if (full_path[i] == '\\') | |
124 | full_path[i] = '/'; | |
125 | } | |
126 | } | |
127 | } | |
128 | strncpy(full_path + dfsplen, CIFS_SB(direntry->d_sb)->prepath, pplen); | |
1da177e4 LT |
129 | return full_path; |
130 | } | |
131 | ||
7fc8f4e9 | 132 | int cifs_posix_open(char *full_path, struct inode **pinode, |
c3b2a0c6 SF |
133 | struct super_block *sb, int mode, int oflags, |
134 | int *poplock, __u16 *pnetfid, int xid) | |
135 | { | |
136 | int rc; | |
137 | __u32 oplock; | |
138 | FILE_UNIX_BASIC_INFO *presp_data; | |
139 | __u32 posix_flags = 0; | |
140 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
141 | ||
142 | cFYI(1, ("posix open %s", full_path)); | |
143 | ||
144 | presp_data = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
145 | if (presp_data == NULL) | |
146 | return -ENOMEM; | |
147 | ||
148 | /* So far cifs posix extensions can only map the following flags. | |
149 | There are other valid fmode oflags such as FMODE_LSEEK, FMODE_PREAD, but | |
150 | so far we do not seem to need them, and we can treat them as local only */ | |
151 | if ((oflags & (FMODE_READ | FMODE_WRITE)) == | |
152 | (FMODE_READ | FMODE_WRITE)) | |
153 | posix_flags = SMB_O_RDWR; | |
154 | else if (oflags & FMODE_READ) | |
155 | posix_flags = SMB_O_RDONLY; | |
156 | else if (oflags & FMODE_WRITE) | |
157 | posix_flags = SMB_O_WRONLY; | |
158 | if (oflags & O_CREAT) | |
159 | posix_flags |= SMB_O_CREAT; | |
160 | if (oflags & O_EXCL) | |
161 | posix_flags |= SMB_O_EXCL; | |
162 | if (oflags & O_TRUNC) | |
163 | posix_flags |= SMB_O_TRUNC; | |
164 | if (oflags & O_APPEND) | |
165 | posix_flags |= SMB_O_APPEND; | |
166 | if (oflags & O_SYNC) | |
167 | posix_flags |= SMB_O_SYNC; | |
168 | if (oflags & O_DIRECTORY) | |
169 | posix_flags |= SMB_O_DIRECTORY; | |
170 | if (oflags & O_NOFOLLOW) | |
171 | posix_flags |= SMB_O_NOFOLLOW; | |
172 | if (oflags & O_DIRECT) | |
173 | posix_flags |= SMB_O_DIRECT; | |
174 | ||
175 | ||
176 | rc = CIFSPOSIXCreate(xid, cifs_sb->tcon, posix_flags, mode, | |
177 | pnetfid, presp_data, &oplock, full_path, | |
178 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
179 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
180 | if (rc) | |
181 | goto posix_open_ret; | |
182 | ||
183 | if (presp_data->Type == cpu_to_le32(-1)) | |
184 | goto posix_open_ret; /* open ok, caller does qpathinfo */ | |
185 | ||
186 | /* get new inode and set it up */ | |
187 | if (!pinode) | |
188 | goto posix_open_ret; /* caller does not need info */ | |
189 | ||
85a6dac5 SF |
190 | if (*pinode == NULL) { |
191 | __u64 unique_id = le64_to_cpu(presp_data->UniqueId); | |
192 | *pinode = cifs_new_inode(sb, &unique_id); | |
193 | } | |
7fc8f4e9 | 194 | /* else an inode was passed in. Update its info, don't create one */ |
c3b2a0c6 SF |
195 | |
196 | /* We do not need to close the file if new_inode fails since | |
197 | the caller will retry qpathinfo as long as inode is null */ | |
198 | if (*pinode == NULL) | |
199 | goto posix_open_ret; | |
200 | ||
201 | posix_fill_in_inode(*pinode, presp_data, 1); | |
202 | ||
203 | posix_open_ret: | |
204 | kfree(presp_data); | |
205 | return rc; | |
206 | } | |
207 | ||
f818dd55 SF |
208 | static void setup_cifs_dentry(struct cifsTconInfo *tcon, |
209 | struct dentry *direntry, | |
210 | struct inode *newinode) | |
211 | { | |
212 | if (tcon->nocase) | |
213 | direntry->d_op = &cifs_ci_dentry_ops; | |
214 | else | |
215 | direntry->d_op = &cifs_dentry_ops; | |
216 | d_instantiate(direntry, newinode); | |
217 | } | |
218 | ||
3979877e | 219 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 LT |
220 | |
221 | int | |
222 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
223 | struct nameidata *nd) | |
224 | { | |
225 | int rc = -ENOENT; | |
226 | int xid; | |
67750fb9 | 227 | int create_options = CREATE_NOT_DIR; |
1da177e4 | 228 | int oplock = 0; |
c3b2a0c6 SF |
229 | int oflags; |
230 | /* | |
231 | * BB below access is probably too much for mknod to request | |
232 | * but we have to do query and setpathinfo so requesting | |
233 | * less could fail (unless we want to request getatr and setatr | |
234 | * permissions (only). At least for POSIX we do not have to | |
235 | * request so much. | |
236 | */ | |
1da177e4 LT |
237 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; |
238 | __u16 fileHandle; | |
239 | struct cifs_sb_info *cifs_sb; | |
f818dd55 | 240 | struct cifsTconInfo *tcon; |
1da177e4 | 241 | char *full_path = NULL; |
fb8c4b14 | 242 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 243 | struct inode *newinode = NULL; |
fb8c4b14 | 244 | struct cifsInodeInfo *pCifsInode; |
1da177e4 | 245 | int disposition = FILE_OVERWRITE_IF; |
4b18f2a9 | 246 | bool write_only = false; |
1da177e4 LT |
247 | |
248 | xid = GetXid(); | |
249 | ||
250 | cifs_sb = CIFS_SB(inode->i_sb); | |
f818dd55 | 251 | tcon = cifs_sb->tcon; |
1da177e4 | 252 | |
1da177e4 | 253 | full_path = build_path_from_dentry(direntry); |
5fdae1f6 | 254 | if (full_path == NULL) { |
1da177e4 LT |
255 | FreeXid(xid); |
256 | return -ENOMEM; | |
257 | } | |
258 | ||
ce3b0f8d | 259 | mode &= ~current_umask(); |
c3b2a0c6 SF |
260 | if (oplockEnabled) |
261 | oplock = REQ_OPLOCK; | |
f818dd55 | 262 | |
c3b2a0c6 SF |
263 | if (nd && (nd->flags & LOOKUP_OPEN)) |
264 | oflags = nd->intent.open.flags; | |
265 | else | |
266 | oflags = FMODE_READ; | |
267 | ||
268 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && | |
269 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
270 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
271 | rc = cifs_posix_open(full_path, &newinode, inode->i_sb, | |
272 | mode, oflags, &oplock, &fileHandle, xid); | |
273 | /* EIO could indicate that (posix open) operation is not | |
274 | supported, despite what server claimed in capability | |
275 | negotation. EREMOTE indicates DFS junction, which is not | |
276 | handled in posix open */ | |
277 | ||
278 | if ((rc == 0) && (newinode == NULL)) | |
279 | goto cifs_create_get_file_info; /* query inode info */ | |
280 | else if (rc == 0) /* success, no need to query */ | |
281 | goto cifs_create_set_dentry; | |
282 | else if ((rc != -EIO) && (rc != -EREMOTE) && | |
283 | (rc != -EOPNOTSUPP)) /* path not found or net err */ | |
284 | goto cifs_create_out; | |
285 | /* else fallthrough to retry, using older open call, this is | |
286 | case where server does not support this SMB level, and | |
287 | falsely claims capability (also get here for DFS case | |
288 | which should be rare for path not covered on files) */ | |
289 | } | |
e08fc045 | 290 | |
c3b2a0c6 SF |
291 | if (nd && (nd->flags & LOOKUP_OPEN)) { |
292 | /* if the file is going to stay open, then we | |
293 | need to set the desired access properly */ | |
e08fc045 MS |
294 | desiredAccess = 0; |
295 | if (oflags & FMODE_READ) | |
c3b2a0c6 | 296 | desiredAccess |= GENERIC_READ; /* is this too little? */ |
e08fc045 MS |
297 | if (oflags & FMODE_WRITE) { |
298 | desiredAccess |= GENERIC_WRITE; | |
299 | if (!(oflags & FMODE_READ)) | |
4b18f2a9 | 300 | write_only = true; |
1da177e4 LT |
301 | } |
302 | ||
5fdae1f6 | 303 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 304 | disposition = FILE_CREATE; |
5fdae1f6 | 305 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 306 | disposition = FILE_OVERWRITE_IF; |
5fdae1f6 | 307 | else if ((oflags & O_CREAT) == O_CREAT) |
1da177e4 | 308 | disposition = FILE_OPEN_IF; |
ad7a2926 | 309 | else |
5fdae1f6 | 310 | cFYI(1, ("Create flag not set in create function")); |
1da177e4 LT |
311 | } |
312 | ||
5fdae1f6 SF |
313 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
314 | ACLs */ | |
1da177e4 | 315 | |
5fdae1f6 SF |
316 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
317 | if (buf == NULL) { | |
1da177e4 LT |
318 | kfree(full_path); |
319 | FreeXid(xid); | |
320 | return -ENOMEM; | |
321 | } | |
67750fb9 | 322 | |
67750fb9 JL |
323 | /* |
324 | * if we're not using unix extensions, see if we need to set | |
325 | * ATTR_READONLY on the create call | |
326 | */ | |
f818dd55 | 327 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
328 | create_options |= CREATE_OPTION_READONLY; |
329 | ||
5fdae1f6 | 330 | if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS) |
f818dd55 | 331 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
67750fb9 | 332 | desiredAccess, create_options, |
737b758c SF |
333 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
334 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5bafd765 SF |
335 | else |
336 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
337 | ||
5fdae1f6 | 338 | if (rc == -EIO) { |
a9d02ad4 | 339 | /* old server, retry the open legacy style */ |
f818dd55 | 340 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
67750fb9 | 341 | desiredAccess, create_options, |
a9d02ad4 SF |
342 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
343 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5fdae1f6 | 344 | } |
1da177e4 | 345 | if (rc) { |
26a21b98 | 346 | cFYI(1, ("cifs_create returned 0x%x", rc)); |
c3b2a0c6 SF |
347 | goto cifs_create_out; |
348 | } | |
349 | ||
350 | /* If Open reported that we actually created a file | |
351 | then we now have to set the mode if possible */ | |
352 | if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { | |
353 | struct cifs_unix_set_info_args args = { | |
4e1e7fb9 JL |
354 | .mode = mode, |
355 | .ctime = NO_CHANGE_64, | |
356 | .atime = NO_CHANGE_64, | |
357 | .mtime = NO_CHANGE_64, | |
358 | .device = 0, | |
c3b2a0c6 SF |
359 | }; |
360 | ||
361 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
362 | args.uid = (__u64) current_fsuid(); | |
363 | if (inode->i_mode & S_ISGID) | |
364 | args.gid = (__u64) inode->i_gid; | |
365 | else | |
366 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 367 | } else { |
c3b2a0c6 SF |
368 | args.uid = NO_CHANGE_64; |
369 | args.gid = NO_CHANGE_64; | |
1da177e4 | 370 | } |
c3b2a0c6 SF |
371 | CIFSSMBUnixSetInfo(xid, tcon, full_path, &args, |
372 | cifs_sb->local_nls, | |
373 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
374 | } else { | |
375 | /* BB implement mode setting via Windows security | |
376 | descriptors e.g. */ | |
377 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ | |
378 | ||
379 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
380 | } | |
1da177e4 | 381 | |
c3b2a0c6 SF |
382 | cifs_create_get_file_info: |
383 | /* server might mask mode so we have to query for it */ | |
384 | if (tcon->unix_ext) | |
385 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
386 | inode->i_sb, xid); | |
387 | else { | |
388 | rc = cifs_get_inode_info(&newinode, full_path, buf, | |
389 | inode->i_sb, xid, &fileHandle); | |
390 | if (newinode) { | |
391 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
392 | newinode->i_mode = mode; | |
393 | if ((oplock & CIFS_CREATE_ACTION) && | |
394 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { | |
395 | newinode->i_uid = current_fsuid(); | |
396 | if (inode->i_mode & S_ISGID) | |
397 | newinode->i_gid = inode->i_gid; | |
398 | else | |
399 | newinode->i_gid = current_fsgid(); | |
6473a559 | 400 | } |
1da177e4 | 401 | } |
c3b2a0c6 | 402 | } |
1da177e4 | 403 | |
c3b2a0c6 SF |
404 | cifs_create_set_dentry: |
405 | if (rc == 0) | |
406 | setup_cifs_dentry(tcon, direntry, newinode); | |
407 | else | |
408 | cFYI(1, ("Create worked, get_inode_info failed rc = %d", rc)); | |
409 | ||
410 | /* nfsd case - nfs srv does not set nd */ | |
411 | if ((nd == NULL) || (!(nd->flags & LOOKUP_OPEN))) { | |
412 | /* mknod case - do not leave file open */ | |
413 | CIFSSMBClose(xid, tcon, fileHandle); | |
414 | } else if (newinode) { | |
415 | struct cifsFileInfo *pCifsFile = | |
416 | kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
417 | ||
418 | if (pCifsFile == NULL) | |
419 | goto cifs_create_out; | |
420 | pCifsFile->netfid = fileHandle; | |
421 | pCifsFile->pid = current->tgid; | |
422 | pCifsFile->pInode = newinode; | |
423 | pCifsFile->invalidHandle = false; | |
424 | pCifsFile->closePend = false; | |
425 | init_MUTEX(&pCifsFile->fh_sem); | |
426 | mutex_init(&pCifsFile->lock_mutex); | |
427 | INIT_LIST_HEAD(&pCifsFile->llist); | |
428 | atomic_set(&pCifsFile->wrtPending, 0); | |
429 | ||
430 | /* set the following in open now | |
d14537f1 | 431 | pCifsFile->pfile = file; */ |
c3b2a0c6 SF |
432 | write_lock(&GlobalSMBSeslock); |
433 | list_add(&pCifsFile->tlist, &tcon->openFileList); | |
434 | pCifsInode = CIFS_I(newinode); | |
435 | if (pCifsInode) { | |
436 | /* if readable file instance put first in list*/ | |
437 | if (write_only) { | |
438 | list_add_tail(&pCifsFile->flist, | |
439 | &pCifsInode->openFileList); | |
440 | } else { | |
441 | list_add(&pCifsFile->flist, | |
442 | &pCifsInode->openFileList); | |
1da177e4 | 443 | } |
c3b2a0c6 SF |
444 | if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
445 | pCifsInode->clientCanCacheAll = true; | |
446 | pCifsInode->clientCanCacheRead = true; | |
447 | cFYI(1, ("Exclusive Oplock inode %p", | |
448 | newinode)); | |
449 | } else if ((oplock & 0xF) == OPLOCK_READ) | |
450 | pCifsInode->clientCanCacheRead = true; | |
1da177e4 | 451 | } |
c3b2a0c6 | 452 | write_unlock(&GlobalSMBSeslock); |
5fdae1f6 | 453 | } |
d14537f1 SF |
454 | cifs_create_out: |
455 | kfree(buf); | |
456 | kfree(full_path); | |
1da177e4 | 457 | FreeXid(xid); |
1da177e4 LT |
458 | return rc; |
459 | } | |
460 | ||
5fdae1f6 SF |
461 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
462 | dev_t device_number) | |
1da177e4 LT |
463 | { |
464 | int rc = -EPERM; | |
465 | int xid; | |
466 | struct cifs_sb_info *cifs_sb; | |
467 | struct cifsTconInfo *pTcon; | |
468 | char *full_path = NULL; | |
fb8c4b14 | 469 | struct inode *newinode = NULL; |
1da177e4 LT |
470 | |
471 | if (!old_valid_dev(device_number)) | |
472 | return -EINVAL; | |
473 | ||
474 | xid = GetXid(); | |
475 | ||
476 | cifs_sb = CIFS_SB(inode->i_sb); | |
477 | pTcon = cifs_sb->tcon; | |
478 | ||
1da177e4 | 479 | full_path = build_path_from_dentry(direntry); |
5fdae1f6 | 480 | if (full_path == NULL) |
1da177e4 | 481 | rc = -ENOMEM; |
c18c842b | 482 | else if (pTcon->unix_ext) { |
4e1e7fb9 | 483 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 484 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
485 | .ctime = NO_CHANGE_64, |
486 | .atime = NO_CHANGE_64, | |
487 | .mtime = NO_CHANGE_64, | |
488 | .device = device_number, | |
489 | }; | |
5fdae1f6 | 490 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
491 | args.uid = (__u64) current_fsuid(); |
492 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 493 | } else { |
4e1e7fb9 JL |
494 | args.uid = NO_CHANGE_64; |
495 | args.gid = NO_CHANGE_64; | |
1da177e4 | 496 | } |
4e1e7fb9 JL |
497 | rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, |
498 | &args, cifs_sb->local_nls, | |
499 | cifs_sb->mnt_cifs_flags & | |
500 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 501 | |
5fdae1f6 | 502 | if (!rc) { |
1da177e4 | 503 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 504 | inode->i_sb, xid); |
b92327fe SF |
505 | if (pTcon->nocase) |
506 | direntry->d_op = &cifs_ci_dentry_ops; | |
507 | else | |
508 | direntry->d_op = &cifs_dentry_ops; | |
5fdae1f6 | 509 | if (rc == 0) |
1da177e4 LT |
510 | d_instantiate(direntry, newinode); |
511 | } | |
d7245c2c | 512 | } else { |
5fdae1f6 | 513 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
eda3c029 SF |
514 | int oplock = 0; |
515 | u16 fileHandle; | |
ad7a2926 | 516 | FILE_ALL_INFO *buf; |
d7245c2c | 517 | |
5fdae1f6 | 518 | cFYI(1, ("sfu compat create special file")); |
d7245c2c | 519 | |
5fdae1f6 SF |
520 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
521 | if (buf == NULL) { | |
eda3c029 SF |
522 | kfree(full_path); |
523 | FreeXid(xid); | |
524 | return -ENOMEM; | |
525 | } | |
526 | ||
527 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
528 | FILE_CREATE, /* fail if exists */ | |
5fdae1f6 | 529 | GENERIC_WRITE /* BB would |
eda3c029 SF |
530 | WRITE_OWNER | WRITE_DAC be better? */, |
531 | /* Create a file and set the | |
532 | file attribute to SYSTEM */ | |
533 | CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
534 | &fileHandle, &oplock, buf, | |
535 | cifs_sb->local_nls, | |
5fdae1f6 | 536 | cifs_sb->mnt_cifs_flags & |
eda3c029 SF |
537 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
538 | ||
5bafd765 SF |
539 | /* BB FIXME - add handling for backlevel servers |
540 | which need legacy open and check for all | |
5fdae1f6 SF |
541 | calls to SMBOpen for fallback to SMBLeagcyOpen */ |
542 | if (!rc) { | |
eda3c029 | 543 | /* BB Do not bother to decode buf since no |
86c96b4b SF |
544 | local inode yet to put timestamps in, |
545 | but we can reuse it safely */ | |
77159b4d | 546 | unsigned int bytes_written; |
86c96b4b SF |
547 | struct win_dev *pdev; |
548 | pdev = (struct win_dev *)buf; | |
5fdae1f6 | 549 | if (S_ISCHR(mode)) { |
86c96b4b SF |
550 | memcpy(pdev->type, "IntxCHR", 8); |
551 | pdev->major = | |
552 | cpu_to_le64(MAJOR(device_number)); | |
5fdae1f6 | 553 | pdev->minor = |
86c96b4b SF |
554 | cpu_to_le64(MINOR(device_number)); |
555 | rc = CIFSSMBWrite(xid, pTcon, | |
556 | fileHandle, | |
557 | sizeof(struct win_dev), | |
558 | 0, &bytes_written, (char *)pdev, | |
559 | NULL, 0); | |
5fdae1f6 | 560 | } else if (S_ISBLK(mode)) { |
86c96b4b SF |
561 | memcpy(pdev->type, "IntxBLK", 8); |
562 | pdev->major = | |
563 | cpu_to_le64(MAJOR(device_number)); | |
564 | pdev->minor = | |
565 | cpu_to_le64(MINOR(device_number)); | |
566 | rc = CIFSSMBWrite(xid, pTcon, | |
567 | fileHandle, | |
568 | sizeof(struct win_dev), | |
569 | 0, &bytes_written, (char *)pdev, | |
570 | NULL, 0); | |
571 | } /* else if(S_ISFIFO */ | |
eda3c029 SF |
572 | CIFSSMBClose(xid, pTcon, fileHandle); |
573 | d_drop(direntry); | |
574 | } | |
575 | kfree(buf); | |
d7245c2c SF |
576 | /* add code here to set EAs */ |
577 | } | |
1da177e4 LT |
578 | } |
579 | ||
d14537f1 | 580 | kfree(full_path); |
1da177e4 | 581 | FreeXid(xid); |
1da177e4 LT |
582 | return rc; |
583 | } | |
584 | ||
585 | ||
586 | struct dentry * | |
5fdae1f6 SF |
587 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
588 | struct nameidata *nd) | |
1da177e4 LT |
589 | { |
590 | int xid; | |
591 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
592 | struct cifs_sb_info *cifs_sb; | |
593 | struct cifsTconInfo *pTcon; | |
594 | struct inode *newInode = NULL; | |
595 | char *full_path = NULL; | |
596 | ||
597 | xid = GetXid(); | |
598 | ||
61e74801 | 599 | cFYI(1, ("parent inode = 0x%p name is: %s and dentry = 0x%p", |
1da177e4 LT |
600 | parent_dir_inode, direntry->d_name.name, direntry)); |
601 | ||
1da177e4 LT |
602 | /* check whether path exists */ |
603 | ||
604 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
605 | pTcon = cifs_sb->tcon; | |
606 | ||
296034f7 SF |
607 | /* |
608 | * Don't allow the separator character in a path component. | |
609 | * The VFS will not allow "/", but "\" is allowed by posix. | |
610 | */ | |
611 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
612 | int i; | |
613 | for (i = 0; i < direntry->d_name.len; i++) | |
614 | if (direntry->d_name.name[i] == '\\') { | |
615 | cFYI(1, ("Invalid file name")); | |
616 | FreeXid(xid); | |
617 | return ERR_PTR(-EINVAL); | |
618 | } | |
619 | } | |
620 | ||
1da177e4 LT |
621 | /* can not grab the rename sem here since it would |
622 | deadlock in the cases (beginning of sys_rename itself) | |
623 | in which we already have the sb rename sem */ | |
624 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 625 | if (full_path == NULL) { |
1da177e4 LT |
626 | FreeXid(xid); |
627 | return ERR_PTR(-ENOMEM); | |
628 | } | |
629 | ||
630 | if (direntry->d_inode != NULL) { | |
61e74801 | 631 | cFYI(1, ("non-NULL inode in lookup")); |
1da177e4 | 632 | } else { |
61e74801 | 633 | cFYI(1, ("NULL inode in lookup")); |
1da177e4 | 634 | } |
61e74801 | 635 | cFYI(1, ("Full path: %s inode = 0x%p", full_path, direntry->d_inode)); |
1da177e4 | 636 | |
c18c842b | 637 | if (pTcon->unix_ext) |
1da177e4 | 638 | rc = cifs_get_inode_info_unix(&newInode, full_path, |
5fdae1f6 | 639 | parent_dir_inode->i_sb, xid); |
1da177e4 LT |
640 | else |
641 | rc = cifs_get_inode_info(&newInode, full_path, NULL, | |
8b1327f6 | 642 | parent_dir_inode->i_sb, xid, NULL); |
1da177e4 LT |
643 | |
644 | if ((rc == 0) && (newInode != NULL)) { | |
b92327fe SF |
645 | if (pTcon->nocase) |
646 | direntry->d_op = &cifs_ci_dentry_ops; | |
647 | else | |
648 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 LT |
649 | d_add(direntry, newInode); |
650 | ||
5fdae1f6 | 651 | /* since paths are not looked up by component - the parent |
3abb9272 | 652 | directories are presumed to be good here */ |
1da177e4 LT |
653 | renew_parental_timestamps(direntry); |
654 | ||
655 | } else if (rc == -ENOENT) { | |
656 | rc = 0; | |
3abb9272 SF |
657 | direntry->d_time = jiffies; |
658 | if (pTcon->nocase) | |
659 | direntry->d_op = &cifs_ci_dentry_ops; | |
660 | else | |
661 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 662 | d_add(direntry, NULL); |
5fdae1f6 SF |
663 | /* if it was once a directory (but how can we tell?) we could do |
664 | shrink_dcache_parent(direntry); */ | |
ed2b9170 SF |
665 | } else if (rc != -EACCES) { |
666 | cERROR(1, ("Unexpected lookup error %d", rc)); | |
667 | /* We special case check for Access Denied - since that | |
668 | is a common return code */ | |
1da177e4 LT |
669 | } |
670 | ||
d14537f1 | 671 | kfree(full_path); |
1da177e4 LT |
672 | FreeXid(xid); |
673 | return ERR_PTR(rc); | |
674 | } | |
675 | ||
1da177e4 LT |
676 | static int |
677 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
678 | { | |
679 | int isValid = 1; | |
680 | ||
1da177e4 | 681 | if (direntry->d_inode) { |
ad7a2926 | 682 | if (cifs_revalidate(direntry)) |
1da177e4 | 683 | return 0; |
1da177e4 | 684 | } else { |
3abb9272 SF |
685 | cFYI(1, ("neg dentry 0x%p name = %s", |
686 | direntry, direntry->d_name.name)); | |
5fdae1f6 | 687 | if (time_after(jiffies, direntry->d_time + HZ) || |
3abb9272 SF |
688 | !lookupCacheEnabled) { |
689 | d_drop(direntry); | |
690 | isValid = 0; | |
5fdae1f6 | 691 | } |
1da177e4 LT |
692 | } |
693 | ||
1da177e4 LT |
694 | return isValid; |
695 | } | |
696 | ||
697 | /* static int cifs_d_delete(struct dentry *direntry) | |
698 | { | |
699 | int rc = 0; | |
700 | ||
701 | cFYI(1, ("In cifs d_delete, name = %s", direntry->d_name.name)); | |
702 | ||
703 | return rc; | |
704 | } */ | |
705 | ||
4fd03e84 | 706 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 707 | .d_revalidate = cifs_d_revalidate, |
5fdae1f6 | 708 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 709 | }; |
b92327fe SF |
710 | |
711 | static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) | |
712 | { | |
713 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
714 | unsigned long hash; | |
715 | int i; | |
716 | ||
717 | hash = init_name_hash(); | |
718 | for (i = 0; i < q->len; i++) | |
719 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
720 | hash); | |
721 | q->hash = end_name_hash(hash); | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
726 | static int cifs_ci_compare(struct dentry *dentry, struct qstr *a, | |
727 | struct qstr *b) | |
728 | { | |
729 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
730 | ||
731 | if ((a->len == b->len) && | |
732 | (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) { | |
733 | /* | |
734 | * To preserve case, don't let an existing negative dentry's | |
735 | * case take precedence. If a is not a negative dentry, this | |
736 | * should have no side effects | |
737 | */ | |
c3291637 | 738 | memcpy((void *)a->name, b->name, a->len); |
b92327fe SF |
739 | return 0; |
740 | } | |
741 | return 1; | |
742 | } | |
743 | ||
4fd03e84 | 744 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
745 | .d_revalidate = cifs_d_revalidate, |
746 | .d_hash = cifs_ci_hash, | |
747 | .d_compare = cifs_ci_compare, | |
748 | }; |