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Commit | Line | Data |
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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> |
1da177e4 LT |
28 | #include "cifsfs.h" |
29 | #include "cifspdu.h" | |
30 | #include "cifsglob.h" | |
31 | #include "cifsproto.h" | |
32 | #include "cifs_debug.h" | |
33 | #include "cifs_fs_sb.h" | |
34 | ||
99ee4dbd | 35 | static void |
1da177e4 LT |
36 | renew_parental_timestamps(struct dentry *direntry) |
37 | { | |
5fdae1f6 SF |
38 | /* BB check if there is a way to get the kernel to do this or if we |
39 | really need this */ | |
1da177e4 LT |
40 | do { |
41 | direntry->d_time = jiffies; | |
42 | direntry = direntry->d_parent; | |
5fdae1f6 | 43 | } while (!IS_ROOT(direntry)); |
1da177e4 LT |
44 | } |
45 | ||
46 | /* Note: caller must free return buffer */ | |
47 | char * | |
48 | build_path_from_dentry(struct dentry *direntry) | |
49 | { | |
50 | struct dentry *temp; | |
2fe87f02 SF |
51 | int namelen; |
52 | int pplen; | |
646dd539 | 53 | int dfsplen; |
1da177e4 | 54 | char *full_path; |
88274815 | 55 | char dirsep; |
646dd539 | 56 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 57 | |
5fdae1f6 | 58 | if (direntry == NULL) |
1da177e4 LT |
59 | return NULL; /* not much we can do if dentry is freed and |
60 | we need to reopen the file after it was closed implicitly | |
61 | when the server crashed */ | |
62 | ||
646dd539 SF |
63 | cifs_sb = CIFS_SB(direntry->d_sb); |
64 | dirsep = CIFS_DIR_SEP(cifs_sb); | |
65 | pplen = cifs_sb->prepathlen; | |
66 | if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS)) | |
67 | dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1); | |
68 | else | |
69 | dfsplen = 0; | |
1da177e4 | 70 | cifs_bp_rename_retry: |
646dd539 | 71 | namelen = pplen + dfsplen; |
1da177e4 LT |
72 | for (temp = direntry; !IS_ROOT(temp);) { |
73 | namelen += (1 + temp->d_name.len); | |
74 | temp = temp->d_parent; | |
5fdae1f6 | 75 | if (temp == NULL) { |
b6b38f70 | 76 | cERROR(1, "corrupt dentry"); |
1da177e4 LT |
77 | return NULL; |
78 | } | |
79 | } | |
80 | ||
81 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 82 | if (full_path == NULL) |
1da177e4 LT |
83 | return full_path; |
84 | full_path[namelen] = 0; /* trailing null */ | |
1da177e4 LT |
85 | for (temp = direntry; !IS_ROOT(temp);) { |
86 | namelen -= 1 + temp->d_name.len; | |
87 | if (namelen < 0) { | |
88 | break; | |
89 | } else { | |
7f57356b | 90 | full_path[namelen] = dirsep; |
1da177e4 LT |
91 | strncpy(full_path + namelen + 1, temp->d_name.name, |
92 | temp->d_name.len); | |
b6b38f70 | 93 | cFYI(0, "name: %s", full_path + namelen); |
1da177e4 LT |
94 | } |
95 | temp = temp->d_parent; | |
5fdae1f6 | 96 | if (temp == NULL) { |
b6b38f70 | 97 | cERROR(1, "corrupt dentry"); |
1da177e4 LT |
98 | kfree(full_path); |
99 | return NULL; | |
100 | } | |
101 | } | |
646dd539 | 102 | if (namelen != pplen + dfsplen) { |
b6b38f70 JP |
103 | cERROR(1, "did not end path lookup where expected namelen is %d", |
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 | ||
fae683f7 SJ |
132 | /* |
133 | * When called with struct file pointer set to NULL, there is no way we could | |
134 | * update file->private_data, but getting it stuck on openFileList provides a | |
135 | * way to access it from cifs_fill_filedata and thereby set file->private_data | |
136 | * from cifs_open. | |
137 | */ | |
086f68bd JL |
138 | struct cifsFileInfo * |
139 | cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, | |
140 | struct file *file, struct vfsmount *mnt, unsigned int oflags) | |
a6ce4932 SF |
141 | { |
142 | int oplock = 0; | |
143 | struct cifsFileInfo *pCifsFile; | |
144 | struct cifsInodeInfo *pCifsInode; | |
3bc303c2 | 145 | struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb); |
a6ce4932 SF |
146 | |
147 | pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
a6ce4932 | 148 | if (pCifsFile == NULL) |
086f68bd | 149 | return pCifsFile; |
a6ce4932 SF |
150 | |
151 | if (oplockEnabled) | |
152 | oplock = REQ_OPLOCK; | |
153 | ||
154 | pCifsFile->netfid = fileHandle; | |
155 | pCifsFile->pid = current->tgid; | |
48541bd3 | 156 | pCifsFile->pInode = igrab(newinode); |
3bc303c2 | 157 | pCifsFile->mnt = mnt; |
086f68bd | 158 | pCifsFile->pfile = file; |
a6ce4932 | 159 | pCifsFile->invalidHandle = false; |
bc8cd439 | 160 | pCifsFile->closePend = false; |
a6ce4932 SF |
161 | mutex_init(&pCifsFile->fh_mutex); |
162 | mutex_init(&pCifsFile->lock_mutex); | |
163 | INIT_LIST_HEAD(&pCifsFile->llist); | |
6ab409b5 | 164 | atomic_set(&pCifsFile->count, 1); |
3bc303c2 | 165 | slow_work_init(&pCifsFile->oplock_break, &cifs_oplock_break_ops); |
a6ce4932 | 166 | |
a6ce4932 | 167 | write_lock(&GlobalSMBSeslock); |
3bc303c2 | 168 | list_add(&pCifsFile->tlist, &cifs_sb->tcon->openFileList); |
a6ce4932 SF |
169 | pCifsInode = CIFS_I(newinode); |
170 | if (pCifsInode) { | |
171 | /* if readable file instance put first in list*/ | |
086f68bd JL |
172 | if (oflags & FMODE_READ) |
173 | list_add(&pCifsFile->flist, &pCifsInode->openFileList); | |
174 | else | |
a6ce4932 SF |
175 | list_add_tail(&pCifsFile->flist, |
176 | &pCifsInode->openFileList); | |
bc8cd439 | 177 | |
a6ce4932 SF |
178 | if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
179 | pCifsInode->clientCanCacheAll = true; | |
180 | pCifsInode->clientCanCacheRead = true; | |
b6b38f70 | 181 | cFYI(1, "Exclusive Oplock inode %p", newinode); |
a6ce4932 | 182 | } else if ((oplock & 0xF) == OPLOCK_READ) |
bc8cd439 | 183 | pCifsInode->clientCanCacheRead = true; |
a6ce4932 SF |
184 | } |
185 | write_unlock(&GlobalSMBSeslock); | |
086f68bd JL |
186 | |
187 | return pCifsFile; | |
a6ce4932 SF |
188 | } |
189 | ||
7fc8f4e9 | 190 | int cifs_posix_open(char *full_path, struct inode **pinode, |
fa588e0c SF |
191 | struct vfsmount *mnt, struct super_block *sb, |
192 | int mode, int oflags, | |
193 | __u32 *poplock, __u16 *pnetfid, int xid) | |
c3b2a0c6 SF |
194 | { |
195 | int rc; | |
c3b2a0c6 SF |
196 | FILE_UNIX_BASIC_INFO *presp_data; |
197 | __u32 posix_flags = 0; | |
fa588e0c | 198 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
cc0bad75 | 199 | struct cifs_fattr fattr; |
c3b2a0c6 | 200 | |
b6b38f70 | 201 | cFYI(1, "posix open %s", full_path); |
c3b2a0c6 SF |
202 | |
203 | presp_data = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
204 | if (presp_data == NULL) | |
205 | return -ENOMEM; | |
206 | ||
207 | /* So far cifs posix extensions can only map the following flags. | |
208 | There are other valid fmode oflags such as FMODE_LSEEK, FMODE_PREAD, but | |
209 | so far we do not seem to need them, and we can treat them as local only */ | |
210 | if ((oflags & (FMODE_READ | FMODE_WRITE)) == | |
211 | (FMODE_READ | FMODE_WRITE)) | |
212 | posix_flags = SMB_O_RDWR; | |
213 | else if (oflags & FMODE_READ) | |
214 | posix_flags = SMB_O_RDONLY; | |
215 | else if (oflags & FMODE_WRITE) | |
216 | posix_flags = SMB_O_WRONLY; | |
217 | if (oflags & O_CREAT) | |
218 | posix_flags |= SMB_O_CREAT; | |
219 | if (oflags & O_EXCL) | |
220 | posix_flags |= SMB_O_EXCL; | |
221 | if (oflags & O_TRUNC) | |
222 | posix_flags |= SMB_O_TRUNC; | |
6b2f3d1f CH |
223 | /* be safe and imply O_SYNC for O_DSYNC */ |
224 | if (oflags & O_DSYNC) | |
c3b2a0c6 SF |
225 | posix_flags |= SMB_O_SYNC; |
226 | if (oflags & O_DIRECTORY) | |
227 | posix_flags |= SMB_O_DIRECTORY; | |
228 | if (oflags & O_NOFOLLOW) | |
229 | posix_flags |= SMB_O_NOFOLLOW; | |
230 | if (oflags & O_DIRECT) | |
231 | posix_flags |= SMB_O_DIRECT; | |
232 | ||
703a3b8e | 233 | mode &= ~current_umask(); |
c3b2a0c6 | 234 | rc = CIFSPOSIXCreate(xid, cifs_sb->tcon, posix_flags, mode, |
590a3fe0 | 235 | pnetfid, presp_data, poplock, full_path, |
c3b2a0c6 SF |
236 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
237 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
238 | if (rc) | |
239 | goto posix_open_ret; | |
240 | ||
241 | if (presp_data->Type == cpu_to_le32(-1)) | |
242 | goto posix_open_ret; /* open ok, caller does qpathinfo */ | |
243 | ||
c3b2a0c6 SF |
244 | if (!pinode) |
245 | goto posix_open_ret; /* caller does not need info */ | |
246 | ||
cc0bad75 JL |
247 | cifs_unix_basic_to_fattr(&fattr, presp_data, cifs_sb); |
248 | ||
249 | /* get new inode and set it up */ | |
85a6dac5 | 250 | if (*pinode == NULL) { |
fa588e0c | 251 | *pinode = cifs_iget(sb, &fattr); |
cc0bad75 JL |
252 | if (!*pinode) { |
253 | rc = -ENOMEM; | |
254 | goto posix_open_ret; | |
255 | } | |
256 | } else { | |
257 | cifs_fattr_to_inode(*pinode, &fattr); | |
85a6dac5 | 258 | } |
c3b2a0c6 | 259 | |
fae683f7 SJ |
260 | /* |
261 | * cifs_fill_filedata() takes care of setting cifsFileInfo pointer to | |
262 | * file->private_data. | |
263 | */ | |
fdb36038 SJ |
264 | if (mnt) { |
265 | struct cifsFileInfo *pfile_info; | |
266 | ||
267 | pfile_info = cifs_new_fileinfo(*pinode, *pnetfid, NULL, mnt, | |
268 | oflags); | |
269 | if (pfile_info == NULL) | |
270 | rc = -ENOMEM; | |
271 | } | |
a6ce4932 | 272 | |
c3b2a0c6 SF |
273 | posix_open_ret: |
274 | kfree(presp_data); | |
275 | return rc; | |
276 | } | |
277 | ||
f818dd55 SF |
278 | static void setup_cifs_dentry(struct cifsTconInfo *tcon, |
279 | struct dentry *direntry, | |
280 | struct inode *newinode) | |
281 | { | |
282 | if (tcon->nocase) | |
283 | direntry->d_op = &cifs_ci_dentry_ops; | |
284 | else | |
285 | direntry->d_op = &cifs_dentry_ops; | |
286 | d_instantiate(direntry, newinode); | |
287 | } | |
288 | ||
3979877e | 289 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 LT |
290 | |
291 | int | |
292 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
293 | struct nameidata *nd) | |
294 | { | |
295 | int rc = -ENOENT; | |
296 | int xid; | |
67750fb9 | 297 | int create_options = CREATE_NOT_DIR; |
590a3fe0 | 298 | __u32 oplock = 0; |
c3b2a0c6 | 299 | int oflags; |
90e4ee5d | 300 | bool posix_create = false; |
c3b2a0c6 SF |
301 | /* |
302 | * BB below access is probably too much for mknod to request | |
303 | * but we have to do query and setpathinfo so requesting | |
304 | * less could fail (unless we want to request getatr and setatr | |
305 | * permissions (only). At least for POSIX we do not have to | |
306 | * request so much. | |
307 | */ | |
1da177e4 LT |
308 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; |
309 | __u16 fileHandle; | |
310 | struct cifs_sb_info *cifs_sb; | |
f818dd55 | 311 | struct cifsTconInfo *tcon; |
1da177e4 | 312 | char *full_path = NULL; |
fb8c4b14 | 313 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 314 | struct inode *newinode = NULL; |
1da177e4 | 315 | int disposition = FILE_OVERWRITE_IF; |
1da177e4 LT |
316 | |
317 | xid = GetXid(); | |
318 | ||
319 | cifs_sb = CIFS_SB(inode->i_sb); | |
f818dd55 | 320 | tcon = cifs_sb->tcon; |
1da177e4 | 321 | |
1da177e4 | 322 | full_path = build_path_from_dentry(direntry); |
5fdae1f6 | 323 | if (full_path == NULL) { |
0f3bc09e | 324 | rc = -ENOMEM; |
1da177e4 | 325 | FreeXid(xid); |
0f3bc09e | 326 | return rc; |
1da177e4 LT |
327 | } |
328 | ||
c3b2a0c6 SF |
329 | if (oplockEnabled) |
330 | oplock = REQ_OPLOCK; | |
f818dd55 | 331 | |
c3b2a0c6 SF |
332 | if (nd && (nd->flags & LOOKUP_OPEN)) |
333 | oflags = nd->intent.open.flags; | |
334 | else | |
fa588e0c | 335 | oflags = FMODE_READ | SMB_O_CREAT; |
c3b2a0c6 SF |
336 | |
337 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && | |
338 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
339 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
fa588e0c SF |
340 | rc = cifs_posix_open(full_path, &newinode, |
341 | nd ? nd->path.mnt : NULL, | |
342 | inode->i_sb, mode, oflags, &oplock, &fileHandle, xid); | |
c3b2a0c6 SF |
343 | /* EIO could indicate that (posix open) operation is not |
344 | supported, despite what server claimed in capability | |
345 | negotation. EREMOTE indicates DFS junction, which is not | |
346 | handled in posix open */ | |
347 | ||
90e4ee5d SF |
348 | if (rc == 0) { |
349 | posix_create = true; | |
350 | if (newinode == NULL) /* query inode info */ | |
351 | goto cifs_create_get_file_info; | |
352 | else /* success, no need to query */ | |
353 | goto cifs_create_set_dentry; | |
354 | } else if ((rc != -EIO) && (rc != -EREMOTE) && | |
703a3b8e | 355 | (rc != -EOPNOTSUPP) && (rc != -EINVAL)) |
c3b2a0c6 SF |
356 | goto cifs_create_out; |
357 | /* else fallthrough to retry, using older open call, this is | |
358 | case where server does not support this SMB level, and | |
359 | falsely claims capability (also get here for DFS case | |
360 | which should be rare for path not covered on files) */ | |
361 | } | |
e08fc045 | 362 | |
c3b2a0c6 SF |
363 | if (nd && (nd->flags & LOOKUP_OPEN)) { |
364 | /* if the file is going to stay open, then we | |
365 | need to set the desired access properly */ | |
e08fc045 MS |
366 | desiredAccess = 0; |
367 | if (oflags & FMODE_READ) | |
c3b2a0c6 | 368 | desiredAccess |= GENERIC_READ; /* is this too little? */ |
086f68bd | 369 | if (oflags & FMODE_WRITE) |
e08fc045 | 370 | desiredAccess |= GENERIC_WRITE; |
1da177e4 | 371 | |
5fdae1f6 | 372 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 373 | disposition = FILE_CREATE; |
5fdae1f6 | 374 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 375 | disposition = FILE_OVERWRITE_IF; |
5fdae1f6 | 376 | else if ((oflags & O_CREAT) == O_CREAT) |
1da177e4 | 377 | disposition = FILE_OPEN_IF; |
ad7a2926 | 378 | else |
b6b38f70 | 379 | cFYI(1, "Create flag not set in create function"); |
1da177e4 LT |
380 | } |
381 | ||
5fdae1f6 SF |
382 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
383 | ACLs */ | |
1da177e4 | 384 | |
5fdae1f6 SF |
385 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
386 | if (buf == NULL) { | |
1da177e4 LT |
387 | kfree(full_path); |
388 | FreeXid(xid); | |
389 | return -ENOMEM; | |
390 | } | |
67750fb9 | 391 | |
67750fb9 JL |
392 | /* |
393 | * if we're not using unix extensions, see if we need to set | |
394 | * ATTR_READONLY on the create call | |
395 | */ | |
f818dd55 | 396 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
397 | create_options |= CREATE_OPTION_READONLY; |
398 | ||
5fdae1f6 | 399 | if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS) |
f818dd55 | 400 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
67750fb9 | 401 | desiredAccess, create_options, |
737b758c SF |
402 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
403 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5bafd765 SF |
404 | else |
405 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
406 | ||
5fdae1f6 | 407 | if (rc == -EIO) { |
a9d02ad4 | 408 | /* old server, retry the open legacy style */ |
f818dd55 | 409 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
67750fb9 | 410 | desiredAccess, create_options, |
a9d02ad4 SF |
411 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
412 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5fdae1f6 | 413 | } |
1da177e4 | 414 | if (rc) { |
b6b38f70 | 415 | cFYI(1, "cifs_create returned 0x%x", rc); |
c3b2a0c6 SF |
416 | goto cifs_create_out; |
417 | } | |
418 | ||
419 | /* If Open reported that we actually created a file | |
420 | then we now have to set the mode if possible */ | |
421 | if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { | |
422 | struct cifs_unix_set_info_args args = { | |
4e1e7fb9 JL |
423 | .mode = mode, |
424 | .ctime = NO_CHANGE_64, | |
425 | .atime = NO_CHANGE_64, | |
426 | .mtime = NO_CHANGE_64, | |
427 | .device = 0, | |
c3b2a0c6 SF |
428 | }; |
429 | ||
430 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
431 | args.uid = (__u64) current_fsuid(); | |
432 | if (inode->i_mode & S_ISGID) | |
433 | args.gid = (__u64) inode->i_gid; | |
434 | else | |
435 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 436 | } else { |
c3b2a0c6 SF |
437 | args.uid = NO_CHANGE_64; |
438 | args.gid = NO_CHANGE_64; | |
1da177e4 | 439 | } |
01ea95e3 JL |
440 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, |
441 | cifs_sb->local_nls, | |
442 | cifs_sb->mnt_cifs_flags & | |
443 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
c3b2a0c6 SF |
444 | } else { |
445 | /* BB implement mode setting via Windows security | |
446 | descriptors e.g. */ | |
447 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ | |
448 | ||
449 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
450 | } | |
1da177e4 | 451 | |
c3b2a0c6 SF |
452 | cifs_create_get_file_info: |
453 | /* server might mask mode so we have to query for it */ | |
454 | if (tcon->unix_ext) | |
455 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
456 | inode->i_sb, xid); | |
457 | else { | |
458 | rc = cifs_get_inode_info(&newinode, full_path, buf, | |
459 | inode->i_sb, xid, &fileHandle); | |
460 | if (newinode) { | |
461 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
462 | newinode->i_mode = mode; | |
463 | if ((oplock & CIFS_CREATE_ACTION) && | |
464 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { | |
465 | newinode->i_uid = current_fsuid(); | |
466 | if (inode->i_mode & S_ISGID) | |
467 | newinode->i_gid = inode->i_gid; | |
468 | else | |
469 | newinode->i_gid = current_fsgid(); | |
6473a559 | 470 | } |
1da177e4 | 471 | } |
c3b2a0c6 | 472 | } |
1da177e4 | 473 | |
c3b2a0c6 SF |
474 | cifs_create_set_dentry: |
475 | if (rc == 0) | |
476 | setup_cifs_dentry(tcon, direntry, newinode); | |
477 | else | |
b6b38f70 | 478 | cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
c3b2a0c6 SF |
479 | |
480 | /* nfsd case - nfs srv does not set nd */ | |
481 | if ((nd == NULL) || (!(nd->flags & LOOKUP_OPEN))) { | |
482 | /* mknod case - do not leave file open */ | |
483 | CIFSSMBClose(xid, tcon, fileHandle); | |
90e4ee5d | 484 | } else if (!(posix_create) && (newinode)) { |
fdb36038 | 485 | struct cifsFileInfo *pfile_info; |
fae683f7 SJ |
486 | /* |
487 | * cifs_fill_filedata() takes care of setting cifsFileInfo | |
488 | * pointer to file->private_data. | |
489 | */ | |
fdb36038 SJ |
490 | pfile_info = cifs_new_fileinfo(newinode, fileHandle, NULL, |
491 | nd->path.mnt, oflags); | |
492 | if (pfile_info == NULL) | |
493 | rc = -ENOMEM; | |
5fdae1f6 | 494 | } |
d14537f1 SF |
495 | cifs_create_out: |
496 | kfree(buf); | |
497 | kfree(full_path); | |
1da177e4 | 498 | FreeXid(xid); |
1da177e4 LT |
499 | return rc; |
500 | } | |
501 | ||
5fdae1f6 SF |
502 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
503 | dev_t device_number) | |
1da177e4 LT |
504 | { |
505 | int rc = -EPERM; | |
506 | int xid; | |
507 | struct cifs_sb_info *cifs_sb; | |
508 | struct cifsTconInfo *pTcon; | |
509 | char *full_path = NULL; | |
fb8c4b14 | 510 | struct inode *newinode = NULL; |
1da177e4 LT |
511 | |
512 | if (!old_valid_dev(device_number)) | |
513 | return -EINVAL; | |
514 | ||
515 | xid = GetXid(); | |
516 | ||
517 | cifs_sb = CIFS_SB(inode->i_sb); | |
518 | pTcon = cifs_sb->tcon; | |
519 | ||
1da177e4 | 520 | full_path = build_path_from_dentry(direntry); |
5fdae1f6 | 521 | if (full_path == NULL) |
1da177e4 | 522 | rc = -ENOMEM; |
c18c842b | 523 | else if (pTcon->unix_ext) { |
4e1e7fb9 | 524 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 525 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
526 | .ctime = NO_CHANGE_64, |
527 | .atime = NO_CHANGE_64, | |
528 | .mtime = NO_CHANGE_64, | |
529 | .device = device_number, | |
530 | }; | |
5fdae1f6 | 531 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
532 | args.uid = (__u64) current_fsuid(); |
533 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 534 | } else { |
4e1e7fb9 JL |
535 | args.uid = NO_CHANGE_64; |
536 | args.gid = NO_CHANGE_64; | |
1da177e4 | 537 | } |
01ea95e3 JL |
538 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
539 | cifs_sb->local_nls, | |
540 | cifs_sb->mnt_cifs_flags & | |
541 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 542 | |
5fdae1f6 | 543 | if (!rc) { |
1da177e4 | 544 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 545 | inode->i_sb, xid); |
b92327fe SF |
546 | if (pTcon->nocase) |
547 | direntry->d_op = &cifs_ci_dentry_ops; | |
548 | else | |
549 | direntry->d_op = &cifs_dentry_ops; | |
5fdae1f6 | 550 | if (rc == 0) |
1da177e4 LT |
551 | d_instantiate(direntry, newinode); |
552 | } | |
d7245c2c | 553 | } else { |
5fdae1f6 | 554 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
eda3c029 SF |
555 | int oplock = 0; |
556 | u16 fileHandle; | |
ad7a2926 | 557 | FILE_ALL_INFO *buf; |
d7245c2c | 558 | |
b6b38f70 | 559 | cFYI(1, "sfu compat create special file"); |
d7245c2c | 560 | |
5fdae1f6 SF |
561 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
562 | if (buf == NULL) { | |
eda3c029 | 563 | kfree(full_path); |
0f3bc09e | 564 | rc = -ENOMEM; |
eda3c029 | 565 | FreeXid(xid); |
0f3bc09e | 566 | return rc; |
eda3c029 SF |
567 | } |
568 | ||
569 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
570 | FILE_CREATE, /* fail if exists */ | |
5fdae1f6 | 571 | GENERIC_WRITE /* BB would |
eda3c029 SF |
572 | WRITE_OWNER | WRITE_DAC be better? */, |
573 | /* Create a file and set the | |
574 | file attribute to SYSTEM */ | |
575 | CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
576 | &fileHandle, &oplock, buf, | |
577 | cifs_sb->local_nls, | |
5fdae1f6 | 578 | cifs_sb->mnt_cifs_flags & |
eda3c029 SF |
579 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
580 | ||
5bafd765 SF |
581 | /* BB FIXME - add handling for backlevel servers |
582 | which need legacy open and check for all | |
5fdae1f6 SF |
583 | calls to SMBOpen for fallback to SMBLeagcyOpen */ |
584 | if (!rc) { | |
eda3c029 | 585 | /* BB Do not bother to decode buf since no |
86c96b4b SF |
586 | local inode yet to put timestamps in, |
587 | but we can reuse it safely */ | |
77159b4d | 588 | unsigned int bytes_written; |
86c96b4b SF |
589 | struct win_dev *pdev; |
590 | pdev = (struct win_dev *)buf; | |
5fdae1f6 | 591 | if (S_ISCHR(mode)) { |
86c96b4b SF |
592 | memcpy(pdev->type, "IntxCHR", 8); |
593 | pdev->major = | |
594 | cpu_to_le64(MAJOR(device_number)); | |
5fdae1f6 | 595 | pdev->minor = |
86c96b4b SF |
596 | cpu_to_le64(MINOR(device_number)); |
597 | rc = CIFSSMBWrite(xid, pTcon, | |
598 | fileHandle, | |
599 | sizeof(struct win_dev), | |
600 | 0, &bytes_written, (char *)pdev, | |
601 | NULL, 0); | |
5fdae1f6 | 602 | } else if (S_ISBLK(mode)) { |
86c96b4b SF |
603 | memcpy(pdev->type, "IntxBLK", 8); |
604 | pdev->major = | |
605 | cpu_to_le64(MAJOR(device_number)); | |
606 | pdev->minor = | |
607 | cpu_to_le64(MINOR(device_number)); | |
608 | rc = CIFSSMBWrite(xid, pTcon, | |
609 | fileHandle, | |
610 | sizeof(struct win_dev), | |
611 | 0, &bytes_written, (char *)pdev, | |
612 | NULL, 0); | |
613 | } /* else if(S_ISFIFO */ | |
eda3c029 SF |
614 | CIFSSMBClose(xid, pTcon, fileHandle); |
615 | d_drop(direntry); | |
616 | } | |
617 | kfree(buf); | |
d7245c2c SF |
618 | /* add code here to set EAs */ |
619 | } | |
1da177e4 LT |
620 | } |
621 | ||
d14537f1 | 622 | kfree(full_path); |
1da177e4 | 623 | FreeXid(xid); |
1da177e4 LT |
624 | return rc; |
625 | } | |
626 | ||
1da177e4 | 627 | struct dentry * |
5fdae1f6 SF |
628 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
629 | struct nameidata *nd) | |
1da177e4 LT |
630 | { |
631 | int xid; | |
632 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
590a3fe0 | 633 | __u32 oplock = 0; |
a6ce4932 SF |
634 | __u16 fileHandle = 0; |
635 | bool posix_open = false; | |
1da177e4 LT |
636 | struct cifs_sb_info *cifs_sb; |
637 | struct cifsTconInfo *pTcon; | |
638 | struct inode *newInode = NULL; | |
639 | char *full_path = NULL; | |
a6ce4932 | 640 | struct file *filp; |
1da177e4 LT |
641 | |
642 | xid = GetXid(); | |
643 | ||
b6b38f70 JP |
644 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", |
645 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 646 | |
1da177e4 LT |
647 | /* check whether path exists */ |
648 | ||
649 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
650 | pTcon = cifs_sb->tcon; | |
651 | ||
296034f7 SF |
652 | /* |
653 | * Don't allow the separator character in a path component. | |
654 | * The VFS will not allow "/", but "\" is allowed by posix. | |
655 | */ | |
656 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
657 | int i; | |
658 | for (i = 0; i < direntry->d_name.len; i++) | |
659 | if (direntry->d_name.name[i] == '\\') { | |
b6b38f70 | 660 | cFYI(1, "Invalid file name"); |
296034f7 SF |
661 | FreeXid(xid); |
662 | return ERR_PTR(-EINVAL); | |
663 | } | |
664 | } | |
665 | ||
5ddf1e0f JL |
666 | /* |
667 | * O_EXCL: optimize away the lookup, but don't hash the dentry. Let | |
668 | * the VFS handle the create. | |
669 | */ | |
8e6c0332 | 670 | if (nd && (nd->flags & LOOKUP_EXCL)) { |
5ddf1e0f | 671 | d_instantiate(direntry, NULL); |
2f81e752 | 672 | return NULL; |
5ddf1e0f JL |
673 | } |
674 | ||
1da177e4 LT |
675 | /* can not grab the rename sem here since it would |
676 | deadlock in the cases (beginning of sys_rename itself) | |
677 | in which we already have the sb rename sem */ | |
678 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 679 | if (full_path == NULL) { |
1da177e4 LT |
680 | FreeXid(xid); |
681 | return ERR_PTR(-ENOMEM); | |
682 | } | |
683 | ||
684 | if (direntry->d_inode != NULL) { | |
b6b38f70 | 685 | cFYI(1, "non-NULL inode in lookup"); |
1da177e4 | 686 | } else { |
b6b38f70 | 687 | cFYI(1, "NULL inode in lookup"); |
1da177e4 | 688 | } |
b6b38f70 | 689 | cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); |
1da177e4 | 690 | |
8db14ca1 SF |
691 | /* Posix open is only called (at lookup time) for file create now. |
692 | * For opens (rather than creates), because we do not know if it | |
693 | * is a file or directory yet, and current Samba no longer allows | |
694 | * us to do posix open on dirs, we could end up wasting an open call | |
695 | * on what turns out to be a dir. For file opens, we wait to call posix | |
696 | * open till cifs_open. It could be added here (lookup) in the future | |
697 | * but the performance tradeoff of the extra network request when EISDIR | |
698 | * or EACCES is returned would have to be weighed against the 50% | |
699 | * reduction in network traffic in the other paths. | |
700 | */ | |
a6ce4932 | 701 | if (pTcon->unix_ext) { |
8e6c0332 | 702 | if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) && |
8db14ca1 SF |
703 | (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && |
704 | (nd->intent.open.flags & O_CREAT)) { | |
3bc303c2 | 705 | rc = cifs_posix_open(full_path, &newInode, nd->path.mnt, |
fa588e0c | 706 | parent_dir_inode->i_sb, |
703a3b8e | 707 | nd->intent.open.create_mode, |
a6ce4932 SF |
708 | nd->intent.open.flags, &oplock, |
709 | &fileHandle, xid); | |
8db14ca1 SF |
710 | /* |
711 | * The check below works around a bug in POSIX | |
712 | * open in samba versions 3.3.1 and earlier where | |
713 | * open could incorrectly fail with invalid parameter. | |
714 | * If either that or op not supported returned, follow | |
715 | * the normal lookup. | |
716 | */ | |
717 | if ((rc == 0) || (rc == -ENOENT)) | |
718 | posix_open = true; | |
719 | else if ((rc == -EINVAL) || (rc != -EOPNOTSUPP)) | |
720 | pTcon->broken_posix_open = true; | |
a6ce4932 SF |
721 | } |
722 | if (!posix_open) | |
723 | rc = cifs_get_inode_info_unix(&newInode, full_path, | |
724 | parent_dir_inode->i_sb, xid); | |
725 | } else | |
1da177e4 | 726 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 727 | parent_dir_inode->i_sb, xid, NULL); |
1da177e4 LT |
728 | |
729 | if ((rc == 0) && (newInode != NULL)) { | |
b92327fe SF |
730 | if (pTcon->nocase) |
731 | direntry->d_op = &cifs_ci_dentry_ops; | |
732 | else | |
733 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 734 | d_add(direntry, newInode); |
a6ce4932 SF |
735 | if (posix_open) |
736 | filp = lookup_instantiate_filp(nd, direntry, NULL); | |
5fdae1f6 | 737 | /* since paths are not looked up by component - the parent |
3abb9272 | 738 | directories are presumed to be good here */ |
1da177e4 LT |
739 | renew_parental_timestamps(direntry); |
740 | ||
741 | } else if (rc == -ENOENT) { | |
742 | rc = 0; | |
3abb9272 SF |
743 | direntry->d_time = jiffies; |
744 | if (pTcon->nocase) | |
745 | direntry->d_op = &cifs_ci_dentry_ops; | |
746 | else | |
747 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 748 | d_add(direntry, NULL); |
5fdae1f6 SF |
749 | /* if it was once a directory (but how can we tell?) we could do |
750 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 751 | } else if (rc != -EACCES) { |
b6b38f70 | 752 | cERROR(1, "Unexpected lookup error %d", rc); |
ed2b9170 SF |
753 | /* We special case check for Access Denied - since that |
754 | is a common return code */ | |
1da177e4 LT |
755 | } |
756 | ||
d14537f1 | 757 | kfree(full_path); |
1da177e4 LT |
758 | FreeXid(xid); |
759 | return ERR_PTR(rc); | |
760 | } | |
761 | ||
1da177e4 LT |
762 | static int |
763 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
764 | { | |
765 | int isValid = 1; | |
766 | ||
1da177e4 | 767 | if (direntry->d_inode) { |
df2cf170 | 768 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 769 | return 0; |
1da177e4 | 770 | } else { |
b6b38f70 JP |
771 | cFYI(1, "neg dentry 0x%p name = %s", |
772 | direntry, direntry->d_name.name); | |
5fdae1f6 | 773 | if (time_after(jiffies, direntry->d_time + HZ) || |
3abb9272 SF |
774 | !lookupCacheEnabled) { |
775 | d_drop(direntry); | |
776 | isValid = 0; | |
5fdae1f6 | 777 | } |
1da177e4 LT |
778 | } |
779 | ||
1da177e4 LT |
780 | return isValid; |
781 | } | |
782 | ||
783 | /* static int cifs_d_delete(struct dentry *direntry) | |
784 | { | |
785 | int rc = 0; | |
786 | ||
b6b38f70 | 787 | cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
1da177e4 LT |
788 | |
789 | return rc; | |
790 | } */ | |
791 | ||
4fd03e84 | 792 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 793 | .d_revalidate = cifs_d_revalidate, |
5fdae1f6 | 794 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 795 | }; |
b92327fe SF |
796 | |
797 | static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) | |
798 | { | |
799 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
800 | unsigned long hash; | |
801 | int i; | |
802 | ||
803 | hash = init_name_hash(); | |
804 | for (i = 0; i < q->len; i++) | |
805 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
806 | hash); | |
807 | q->hash = end_name_hash(hash); | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | static int cifs_ci_compare(struct dentry *dentry, struct qstr *a, | |
813 | struct qstr *b) | |
814 | { | |
815 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
816 | ||
817 | if ((a->len == b->len) && | |
818 | (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) { | |
819 | /* | |
820 | * To preserve case, don't let an existing negative dentry's | |
821 | * case take precedence. If a is not a negative dentry, this | |
822 | * should have no side effects | |
823 | */ | |
c3291637 | 824 | memcpy((void *)a->name, b->name, a->len); |
b92327fe SF |
825 | return 0; |
826 | } | |
827 | return 1; | |
828 | } | |
829 | ||
4fd03e84 | 830 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
831 | .d_revalidate = cifs_d_revalidate, |
832 | .d_hash = cifs_ci_hash, | |
833 | .d_compare = cifs_ci_compare, | |
834 | }; |