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