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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 SF |
75 | if (temp == NULL) { |
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); | |
2fe87f02 | 93 | cFYI(0, ("name: %s", full_path + namelen)); |
1da177e4 LT |
94 | } |
95 | temp = temp->d_parent; | |
5fdae1f6 SF |
96 | if (temp == NULL) { |
97 | cERROR(1, ("corrupt dentry")); | |
1da177e4 LT |
98 | kfree(full_path); |
99 | return NULL; | |
100 | } | |
101 | } | |
646dd539 | 102 | if (namelen != pplen + dfsplen) { |
1da177e4 | 103 | cERROR(1, |
2fe87f02 | 104 | ("did not end path lookup where expected namelen is %d", |
1da177e4 | 105 | namelen)); |
5fdae1f6 | 106 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
107 | of one of the parent directories (we can not lock the dentries |
108 | above us to prevent this, but retrying should be harmless) */ | |
109 | kfree(full_path); | |
1da177e4 LT |
110 | goto cifs_bp_rename_retry; |
111 | } | |
2fe87f02 SF |
112 | /* DIR_SEP already set for byte 0 / vs \ but not for |
113 | subsequent slashes in prepath which currently must | |
114 | be entered the right way - not sure if there is an alternative | |
115 | since the '\' is a valid posix character so we can not switch | |
116 | those safely to '/' if any are found in the middle of the prepath */ | |
117 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
646dd539 SF |
118 | |
119 | if (dfsplen) { | |
120 | strncpy(full_path, cifs_sb->tcon->treeName, dfsplen); | |
121 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
122 | int i; | |
123 | for (i = 0; i < dfsplen; i++) { | |
124 | if (full_path[i] == '\\') | |
125 | full_path[i] = '/'; | |
126 | } | |
127 | } | |
128 | } | |
129 | strncpy(full_path + dfsplen, CIFS_SB(direntry->d_sb)->prepath, pplen); | |
1da177e4 LT |
130 | return full_path; |
131 | } | |
132 | ||
086f68bd JL |
133 | struct cifsFileInfo * |
134 | cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, | |
135 | struct file *file, struct vfsmount *mnt, unsigned int oflags) | |
a6ce4932 SF |
136 | { |
137 | int oplock = 0; | |
138 | struct cifsFileInfo *pCifsFile; | |
139 | struct cifsInodeInfo *pCifsInode; | |
3bc303c2 | 140 | struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb); |
a6ce4932 SF |
141 | |
142 | pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
a6ce4932 | 143 | if (pCifsFile == NULL) |
086f68bd | 144 | return pCifsFile; |
a6ce4932 SF |
145 | |
146 | if (oplockEnabled) | |
147 | oplock = REQ_OPLOCK; | |
148 | ||
149 | pCifsFile->netfid = fileHandle; | |
150 | pCifsFile->pid = current->tgid; | |
48541bd3 | 151 | pCifsFile->pInode = igrab(newinode); |
3bc303c2 | 152 | pCifsFile->mnt = mnt; |
086f68bd | 153 | pCifsFile->pfile = file; |
a6ce4932 | 154 | pCifsFile->invalidHandle = false; |
bc8cd439 | 155 | pCifsFile->closePend = false; |
a6ce4932 SF |
156 | mutex_init(&pCifsFile->fh_mutex); |
157 | mutex_init(&pCifsFile->lock_mutex); | |
158 | INIT_LIST_HEAD(&pCifsFile->llist); | |
6ab409b5 | 159 | atomic_set(&pCifsFile->count, 1); |
3bc303c2 | 160 | slow_work_init(&pCifsFile->oplock_break, &cifs_oplock_break_ops); |
a6ce4932 | 161 | |
a6ce4932 | 162 | write_lock(&GlobalSMBSeslock); |
3bc303c2 | 163 | list_add(&pCifsFile->tlist, &cifs_sb->tcon->openFileList); |
a6ce4932 SF |
164 | pCifsInode = CIFS_I(newinode); |
165 | if (pCifsInode) { | |
166 | /* if readable file instance put first in list*/ | |
086f68bd JL |
167 | if (oflags & FMODE_READ) |
168 | list_add(&pCifsFile->flist, &pCifsInode->openFileList); | |
169 | else | |
a6ce4932 SF |
170 | list_add_tail(&pCifsFile->flist, |
171 | &pCifsInode->openFileList); | |
bc8cd439 | 172 | |
a6ce4932 SF |
173 | if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
174 | pCifsInode->clientCanCacheAll = true; | |
175 | pCifsInode->clientCanCacheRead = true; | |
bc8cd439 | 176 | cFYI(1, ("Exclusive Oplock inode %p", newinode)); |
a6ce4932 | 177 | } else if ((oplock & 0xF) == OPLOCK_READ) |
bc8cd439 | 178 | pCifsInode->clientCanCacheRead = true; |
a6ce4932 SF |
179 | } |
180 | write_unlock(&GlobalSMBSeslock); | |
086f68bd JL |
181 | |
182 | return pCifsFile; | |
a6ce4932 SF |
183 | } |
184 | ||
7fc8f4e9 | 185 | int cifs_posix_open(char *full_path, struct inode **pinode, |
3bc303c2 | 186 | struct vfsmount *mnt, int mode, int oflags, |
590a3fe0 | 187 | __u32 *poplock, __u16 *pnetfid, int xid) |
c3b2a0c6 SF |
188 | { |
189 | int rc; | |
c3b2a0c6 SF |
190 | FILE_UNIX_BASIC_INFO *presp_data; |
191 | __u32 posix_flags = 0; | |
3bc303c2 | 192 | struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb); |
cc0bad75 | 193 | struct cifs_fattr fattr; |
c3b2a0c6 SF |
194 | |
195 | cFYI(1, ("posix open %s", full_path)); | |
196 | ||
197 | presp_data = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
198 | if (presp_data == NULL) | |
199 | return -ENOMEM; | |
200 | ||
201 | /* So far cifs posix extensions can only map the following flags. | |
202 | There are other valid fmode oflags such as FMODE_LSEEK, FMODE_PREAD, but | |
203 | so far we do not seem to need them, and we can treat them as local only */ | |
204 | if ((oflags & (FMODE_READ | FMODE_WRITE)) == | |
205 | (FMODE_READ | FMODE_WRITE)) | |
206 | posix_flags = SMB_O_RDWR; | |
207 | else if (oflags & FMODE_READ) | |
208 | posix_flags = SMB_O_RDONLY; | |
209 | else if (oflags & FMODE_WRITE) | |
210 | posix_flags = SMB_O_WRONLY; | |
211 | if (oflags & O_CREAT) | |
212 | posix_flags |= SMB_O_CREAT; | |
213 | if (oflags & O_EXCL) | |
214 | posix_flags |= SMB_O_EXCL; | |
215 | if (oflags & O_TRUNC) | |
216 | posix_flags |= SMB_O_TRUNC; | |
6b2f3d1f CH |
217 | /* be safe and imply O_SYNC for O_DSYNC */ |
218 | if (oflags & O_DSYNC) | |
c3b2a0c6 SF |
219 | posix_flags |= SMB_O_SYNC; |
220 | if (oflags & O_DIRECTORY) | |
221 | posix_flags |= SMB_O_DIRECTORY; | |
222 | if (oflags & O_NOFOLLOW) | |
223 | posix_flags |= SMB_O_NOFOLLOW; | |
224 | if (oflags & O_DIRECT) | |
225 | posix_flags |= SMB_O_DIRECT; | |
226 | ||
703a3b8e | 227 | mode &= ~current_umask(); |
c3b2a0c6 | 228 | rc = CIFSPOSIXCreate(xid, cifs_sb->tcon, posix_flags, mode, |
590a3fe0 | 229 | pnetfid, presp_data, poplock, full_path, |
c3b2a0c6 SF |
230 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
231 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
232 | if (rc) | |
233 | goto posix_open_ret; | |
234 | ||
235 | if (presp_data->Type == cpu_to_le32(-1)) | |
236 | goto posix_open_ret; /* open ok, caller does qpathinfo */ | |
237 | ||
c3b2a0c6 SF |
238 | if (!pinode) |
239 | goto posix_open_ret; /* caller does not need info */ | |
240 | ||
cc0bad75 JL |
241 | cifs_unix_basic_to_fattr(&fattr, presp_data, cifs_sb); |
242 | ||
243 | /* get new inode and set it up */ | |
85a6dac5 | 244 | if (*pinode == NULL) { |
3bc303c2 | 245 | *pinode = cifs_iget(mnt->mnt_sb, &fattr); |
cc0bad75 JL |
246 | if (!*pinode) { |
247 | rc = -ENOMEM; | |
248 | goto posix_open_ret; | |
249 | } | |
250 | } else { | |
251 | cifs_fattr_to_inode(*pinode, &fattr); | |
85a6dac5 | 252 | } |
c3b2a0c6 | 253 | |
086f68bd | 254 | cifs_new_fileinfo(*pinode, *pnetfid, NULL, mnt, oflags); |
a6ce4932 | 255 | |
c3b2a0c6 SF |
256 | posix_open_ret: |
257 | kfree(presp_data); | |
258 | return rc; | |
259 | } | |
260 | ||
f818dd55 SF |
261 | static void setup_cifs_dentry(struct cifsTconInfo *tcon, |
262 | struct dentry *direntry, | |
263 | struct inode *newinode) | |
264 | { | |
265 | if (tcon->nocase) | |
266 | direntry->d_op = &cifs_ci_dentry_ops; | |
267 | else | |
268 | direntry->d_op = &cifs_dentry_ops; | |
269 | d_instantiate(direntry, newinode); | |
270 | } | |
271 | ||
3979877e | 272 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 LT |
273 | |
274 | int | |
275 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
276 | struct nameidata *nd) | |
277 | { | |
278 | int rc = -ENOENT; | |
279 | int xid; | |
67750fb9 | 280 | int create_options = CREATE_NOT_DIR; |
590a3fe0 | 281 | __u32 oplock = 0; |
c3b2a0c6 | 282 | int oflags; |
90e4ee5d | 283 | bool posix_create = false; |
c3b2a0c6 SF |
284 | /* |
285 | * BB below access is probably too much for mknod to request | |
286 | * but we have to do query and setpathinfo so requesting | |
287 | * less could fail (unless we want to request getatr and setatr | |
288 | * permissions (only). At least for POSIX we do not have to | |
289 | * request so much. | |
290 | */ | |
1da177e4 LT |
291 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; |
292 | __u16 fileHandle; | |
293 | struct cifs_sb_info *cifs_sb; | |
f818dd55 | 294 | struct cifsTconInfo *tcon; |
1da177e4 | 295 | char *full_path = NULL; |
fb8c4b14 | 296 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 297 | struct inode *newinode = NULL; |
1da177e4 | 298 | int disposition = FILE_OVERWRITE_IF; |
1da177e4 LT |
299 | |
300 | xid = GetXid(); | |
301 | ||
302 | cifs_sb = CIFS_SB(inode->i_sb); | |
f818dd55 | 303 | tcon = cifs_sb->tcon; |
1da177e4 | 304 | |
1da177e4 | 305 | full_path = build_path_from_dentry(direntry); |
5fdae1f6 | 306 | if (full_path == NULL) { |
0f3bc09e | 307 | rc = -ENOMEM; |
1da177e4 | 308 | FreeXid(xid); |
0f3bc09e | 309 | return rc; |
1da177e4 LT |
310 | } |
311 | ||
c3b2a0c6 SF |
312 | if (oplockEnabled) |
313 | oplock = REQ_OPLOCK; | |
f818dd55 | 314 | |
c3b2a0c6 SF |
315 | if (nd && (nd->flags & LOOKUP_OPEN)) |
316 | oflags = nd->intent.open.flags; | |
317 | else | |
318 | oflags = FMODE_READ; | |
319 | ||
320 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && | |
321 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
322 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
3bc303c2 | 323 | rc = cifs_posix_open(full_path, &newinode, nd->path.mnt, |
c3b2a0c6 SF |
324 | mode, oflags, &oplock, &fileHandle, xid); |
325 | /* EIO could indicate that (posix open) operation is not | |
326 | supported, despite what server claimed in capability | |
327 | negotation. EREMOTE indicates DFS junction, which is not | |
328 | handled in posix open */ | |
329 | ||
90e4ee5d SF |
330 | if (rc == 0) { |
331 | posix_create = true; | |
332 | if (newinode == NULL) /* query inode info */ | |
333 | goto cifs_create_get_file_info; | |
334 | else /* success, no need to query */ | |
335 | goto cifs_create_set_dentry; | |
336 | } else if ((rc != -EIO) && (rc != -EREMOTE) && | |
703a3b8e | 337 | (rc != -EOPNOTSUPP) && (rc != -EINVAL)) |
c3b2a0c6 SF |
338 | goto cifs_create_out; |
339 | /* else fallthrough to retry, using older open call, this is | |
340 | case where server does not support this SMB level, and | |
341 | falsely claims capability (also get here for DFS case | |
342 | which should be rare for path not covered on files) */ | |
343 | } | |
e08fc045 | 344 | |
c3b2a0c6 SF |
345 | if (nd && (nd->flags & LOOKUP_OPEN)) { |
346 | /* if the file is going to stay open, then we | |
347 | need to set the desired access properly */ | |
e08fc045 MS |
348 | desiredAccess = 0; |
349 | if (oflags & FMODE_READ) | |
c3b2a0c6 | 350 | desiredAccess |= GENERIC_READ; /* is this too little? */ |
086f68bd | 351 | if (oflags & FMODE_WRITE) |
e08fc045 | 352 | desiredAccess |= GENERIC_WRITE; |
1da177e4 | 353 | |
5fdae1f6 | 354 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 355 | disposition = FILE_CREATE; |
5fdae1f6 | 356 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 357 | disposition = FILE_OVERWRITE_IF; |
5fdae1f6 | 358 | else if ((oflags & O_CREAT) == O_CREAT) |
1da177e4 | 359 | disposition = FILE_OPEN_IF; |
ad7a2926 | 360 | else |
5fdae1f6 | 361 | cFYI(1, ("Create flag not set in create function")); |
1da177e4 LT |
362 | } |
363 | ||
5fdae1f6 SF |
364 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
365 | ACLs */ | |
1da177e4 | 366 | |
5fdae1f6 SF |
367 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
368 | if (buf == NULL) { | |
1da177e4 LT |
369 | kfree(full_path); |
370 | FreeXid(xid); | |
371 | return -ENOMEM; | |
372 | } | |
67750fb9 | 373 | |
67750fb9 JL |
374 | /* |
375 | * if we're not using unix extensions, see if we need to set | |
376 | * ATTR_READONLY on the create call | |
377 | */ | |
f818dd55 | 378 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
379 | create_options |= CREATE_OPTION_READONLY; |
380 | ||
5fdae1f6 | 381 | if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS) |
f818dd55 | 382 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
67750fb9 | 383 | desiredAccess, create_options, |
737b758c SF |
384 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
385 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5bafd765 SF |
386 | else |
387 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
388 | ||
5fdae1f6 | 389 | if (rc == -EIO) { |
a9d02ad4 | 390 | /* old server, retry the open legacy style */ |
f818dd55 | 391 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
67750fb9 | 392 | desiredAccess, create_options, |
a9d02ad4 SF |
393 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
394 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5fdae1f6 | 395 | } |
1da177e4 | 396 | if (rc) { |
26a21b98 | 397 | cFYI(1, ("cifs_create returned 0x%x", rc)); |
c3b2a0c6 SF |
398 | goto cifs_create_out; |
399 | } | |
400 | ||
401 | /* If Open reported that we actually created a file | |
402 | then we now have to set the mode if possible */ | |
403 | if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { | |
404 | struct cifs_unix_set_info_args args = { | |
4e1e7fb9 JL |
405 | .mode = mode, |
406 | .ctime = NO_CHANGE_64, | |
407 | .atime = NO_CHANGE_64, | |
408 | .mtime = NO_CHANGE_64, | |
409 | .device = 0, | |
c3b2a0c6 SF |
410 | }; |
411 | ||
412 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
413 | args.uid = (__u64) current_fsuid(); | |
414 | if (inode->i_mode & S_ISGID) | |
415 | args.gid = (__u64) inode->i_gid; | |
416 | else | |
417 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 418 | } else { |
c3b2a0c6 SF |
419 | args.uid = NO_CHANGE_64; |
420 | args.gid = NO_CHANGE_64; | |
1da177e4 | 421 | } |
01ea95e3 JL |
422 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, |
423 | cifs_sb->local_nls, | |
424 | cifs_sb->mnt_cifs_flags & | |
425 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
c3b2a0c6 SF |
426 | } else { |
427 | /* BB implement mode setting via Windows security | |
428 | descriptors e.g. */ | |
429 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ | |
430 | ||
431 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
432 | } | |
1da177e4 | 433 | |
c3b2a0c6 SF |
434 | cifs_create_get_file_info: |
435 | /* server might mask mode so we have to query for it */ | |
436 | if (tcon->unix_ext) | |
437 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
438 | inode->i_sb, xid); | |
439 | else { | |
440 | rc = cifs_get_inode_info(&newinode, full_path, buf, | |
441 | inode->i_sb, xid, &fileHandle); | |
442 | if (newinode) { | |
443 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
444 | newinode->i_mode = mode; | |
445 | if ((oplock & CIFS_CREATE_ACTION) && | |
446 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { | |
447 | newinode->i_uid = current_fsuid(); | |
448 | if (inode->i_mode & S_ISGID) | |
449 | newinode->i_gid = inode->i_gid; | |
450 | else | |
451 | newinode->i_gid = current_fsgid(); | |
6473a559 | 452 | } |
1da177e4 | 453 | } |
c3b2a0c6 | 454 | } |
1da177e4 | 455 | |
c3b2a0c6 SF |
456 | cifs_create_set_dentry: |
457 | if (rc == 0) | |
458 | setup_cifs_dentry(tcon, direntry, newinode); | |
459 | else | |
460 | cFYI(1, ("Create worked, get_inode_info failed rc = %d", rc)); | |
461 | ||
462 | /* nfsd case - nfs srv does not set nd */ | |
463 | if ((nd == NULL) || (!(nd->flags & LOOKUP_OPEN))) { | |
464 | /* mknod case - do not leave file open */ | |
465 | CIFSSMBClose(xid, tcon, fileHandle); | |
90e4ee5d | 466 | } else if (!(posix_create) && (newinode)) { |
086f68bd JL |
467 | cifs_new_fileinfo(newinode, fileHandle, NULL, |
468 | nd->path.mnt, oflags); | |
5fdae1f6 | 469 | } |
d14537f1 SF |
470 | cifs_create_out: |
471 | kfree(buf); | |
472 | kfree(full_path); | |
1da177e4 | 473 | FreeXid(xid); |
1da177e4 LT |
474 | return rc; |
475 | } | |
476 | ||
5fdae1f6 SF |
477 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
478 | dev_t device_number) | |
1da177e4 LT |
479 | { |
480 | int rc = -EPERM; | |
481 | int xid; | |
482 | struct cifs_sb_info *cifs_sb; | |
483 | struct cifsTconInfo *pTcon; | |
484 | char *full_path = NULL; | |
fb8c4b14 | 485 | struct inode *newinode = NULL; |
1da177e4 LT |
486 | |
487 | if (!old_valid_dev(device_number)) | |
488 | return -EINVAL; | |
489 | ||
490 | xid = GetXid(); | |
491 | ||
492 | cifs_sb = CIFS_SB(inode->i_sb); | |
493 | pTcon = cifs_sb->tcon; | |
494 | ||
1da177e4 | 495 | full_path = build_path_from_dentry(direntry); |
5fdae1f6 | 496 | if (full_path == NULL) |
1da177e4 | 497 | rc = -ENOMEM; |
c18c842b | 498 | else if (pTcon->unix_ext) { |
4e1e7fb9 | 499 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 500 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
501 | .ctime = NO_CHANGE_64, |
502 | .atime = NO_CHANGE_64, | |
503 | .mtime = NO_CHANGE_64, | |
504 | .device = device_number, | |
505 | }; | |
5fdae1f6 | 506 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
507 | args.uid = (__u64) current_fsuid(); |
508 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 509 | } else { |
4e1e7fb9 JL |
510 | args.uid = NO_CHANGE_64; |
511 | args.gid = NO_CHANGE_64; | |
1da177e4 | 512 | } |
01ea95e3 JL |
513 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
514 | cifs_sb->local_nls, | |
515 | cifs_sb->mnt_cifs_flags & | |
516 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 517 | |
5fdae1f6 | 518 | if (!rc) { |
1da177e4 | 519 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 520 | inode->i_sb, xid); |
b92327fe SF |
521 | if (pTcon->nocase) |
522 | direntry->d_op = &cifs_ci_dentry_ops; | |
523 | else | |
524 | direntry->d_op = &cifs_dentry_ops; | |
5fdae1f6 | 525 | if (rc == 0) |
1da177e4 LT |
526 | d_instantiate(direntry, newinode); |
527 | } | |
d7245c2c | 528 | } else { |
5fdae1f6 | 529 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
eda3c029 SF |
530 | int oplock = 0; |
531 | u16 fileHandle; | |
ad7a2926 | 532 | FILE_ALL_INFO *buf; |
d7245c2c | 533 | |
5fdae1f6 | 534 | cFYI(1, ("sfu compat create special file")); |
d7245c2c | 535 | |
5fdae1f6 SF |
536 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
537 | if (buf == NULL) { | |
eda3c029 | 538 | kfree(full_path); |
0f3bc09e | 539 | rc = -ENOMEM; |
eda3c029 | 540 | FreeXid(xid); |
0f3bc09e | 541 | return rc; |
eda3c029 SF |
542 | } |
543 | ||
544 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
545 | FILE_CREATE, /* fail if exists */ | |
5fdae1f6 | 546 | GENERIC_WRITE /* BB would |
eda3c029 SF |
547 | WRITE_OWNER | WRITE_DAC be better? */, |
548 | /* Create a file and set the | |
549 | file attribute to SYSTEM */ | |
550 | CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
551 | &fileHandle, &oplock, buf, | |
552 | cifs_sb->local_nls, | |
5fdae1f6 | 553 | cifs_sb->mnt_cifs_flags & |
eda3c029 SF |
554 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
555 | ||
5bafd765 SF |
556 | /* BB FIXME - add handling for backlevel servers |
557 | which need legacy open and check for all | |
5fdae1f6 SF |
558 | calls to SMBOpen for fallback to SMBLeagcyOpen */ |
559 | if (!rc) { | |
eda3c029 | 560 | /* BB Do not bother to decode buf since no |
86c96b4b SF |
561 | local inode yet to put timestamps in, |
562 | but we can reuse it safely */ | |
77159b4d | 563 | unsigned int bytes_written; |
86c96b4b SF |
564 | struct win_dev *pdev; |
565 | pdev = (struct win_dev *)buf; | |
5fdae1f6 | 566 | if (S_ISCHR(mode)) { |
86c96b4b SF |
567 | memcpy(pdev->type, "IntxCHR", 8); |
568 | pdev->major = | |
569 | cpu_to_le64(MAJOR(device_number)); | |
5fdae1f6 | 570 | pdev->minor = |
86c96b4b SF |
571 | cpu_to_le64(MINOR(device_number)); |
572 | rc = CIFSSMBWrite(xid, pTcon, | |
573 | fileHandle, | |
574 | sizeof(struct win_dev), | |
575 | 0, &bytes_written, (char *)pdev, | |
576 | NULL, 0); | |
5fdae1f6 | 577 | } else if (S_ISBLK(mode)) { |
86c96b4b SF |
578 | memcpy(pdev->type, "IntxBLK", 8); |
579 | pdev->major = | |
580 | cpu_to_le64(MAJOR(device_number)); | |
581 | pdev->minor = | |
582 | cpu_to_le64(MINOR(device_number)); | |
583 | rc = CIFSSMBWrite(xid, pTcon, | |
584 | fileHandle, | |
585 | sizeof(struct win_dev), | |
586 | 0, &bytes_written, (char *)pdev, | |
587 | NULL, 0); | |
588 | } /* else if(S_ISFIFO */ | |
eda3c029 SF |
589 | CIFSSMBClose(xid, pTcon, fileHandle); |
590 | d_drop(direntry); | |
591 | } | |
592 | kfree(buf); | |
d7245c2c SF |
593 | /* add code here to set EAs */ |
594 | } | |
1da177e4 LT |
595 | } |
596 | ||
d14537f1 | 597 | kfree(full_path); |
1da177e4 | 598 | FreeXid(xid); |
1da177e4 LT |
599 | return rc; |
600 | } | |
601 | ||
1da177e4 | 602 | struct dentry * |
5fdae1f6 SF |
603 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
604 | struct nameidata *nd) | |
1da177e4 LT |
605 | { |
606 | int xid; | |
607 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
590a3fe0 | 608 | __u32 oplock = 0; |
a6ce4932 SF |
609 | __u16 fileHandle = 0; |
610 | bool posix_open = false; | |
1da177e4 LT |
611 | struct cifs_sb_info *cifs_sb; |
612 | struct cifsTconInfo *pTcon; | |
613 | struct inode *newInode = NULL; | |
614 | char *full_path = NULL; | |
a6ce4932 | 615 | struct file *filp; |
1da177e4 LT |
616 | |
617 | xid = GetXid(); | |
618 | ||
61e74801 | 619 | cFYI(1, ("parent inode = 0x%p name is: %s and dentry = 0x%p", |
1da177e4 LT |
620 | parent_dir_inode, direntry->d_name.name, direntry)); |
621 | ||
1da177e4 LT |
622 | /* check whether path exists */ |
623 | ||
624 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
625 | pTcon = cifs_sb->tcon; | |
626 | ||
296034f7 SF |
627 | /* |
628 | * Don't allow the separator character in a path component. | |
629 | * The VFS will not allow "/", but "\" is allowed by posix. | |
630 | */ | |
631 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
632 | int i; | |
633 | for (i = 0; i < direntry->d_name.len; i++) | |
634 | if (direntry->d_name.name[i] == '\\') { | |
635 | cFYI(1, ("Invalid file name")); | |
636 | FreeXid(xid); | |
637 | return ERR_PTR(-EINVAL); | |
638 | } | |
639 | } | |
640 | ||
5ddf1e0f JL |
641 | /* |
642 | * O_EXCL: optimize away the lookup, but don't hash the dentry. Let | |
643 | * the VFS handle the create. | |
644 | */ | |
8e6c0332 | 645 | if (nd && (nd->flags & LOOKUP_EXCL)) { |
5ddf1e0f | 646 | d_instantiate(direntry, NULL); |
2f81e752 | 647 | return NULL; |
5ddf1e0f JL |
648 | } |
649 | ||
1da177e4 LT |
650 | /* can not grab the rename sem here since it would |
651 | deadlock in the cases (beginning of sys_rename itself) | |
652 | in which we already have the sb rename sem */ | |
653 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 654 | if (full_path == NULL) { |
1da177e4 LT |
655 | FreeXid(xid); |
656 | return ERR_PTR(-ENOMEM); | |
657 | } | |
658 | ||
659 | if (direntry->d_inode != NULL) { | |
61e74801 | 660 | cFYI(1, ("non-NULL inode in lookup")); |
1da177e4 | 661 | } else { |
61e74801 | 662 | cFYI(1, ("NULL inode in lookup")); |
1da177e4 | 663 | } |
61e74801 | 664 | cFYI(1, ("Full path: %s inode = 0x%p", full_path, direntry->d_inode)); |
1da177e4 | 665 | |
8db14ca1 SF |
666 | /* Posix open is only called (at lookup time) for file create now. |
667 | * For opens (rather than creates), because we do not know if it | |
668 | * is a file or directory yet, and current Samba no longer allows | |
669 | * us to do posix open on dirs, we could end up wasting an open call | |
670 | * on what turns out to be a dir. For file opens, we wait to call posix | |
671 | * open till cifs_open. It could be added here (lookup) in the future | |
672 | * but the performance tradeoff of the extra network request when EISDIR | |
673 | * or EACCES is returned would have to be weighed against the 50% | |
674 | * reduction in network traffic in the other paths. | |
675 | */ | |
a6ce4932 | 676 | if (pTcon->unix_ext) { |
8e6c0332 | 677 | if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) && |
8db14ca1 SF |
678 | (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && |
679 | (nd->intent.open.flags & O_CREAT)) { | |
3bc303c2 | 680 | rc = cifs_posix_open(full_path, &newInode, nd->path.mnt, |
703a3b8e | 681 | nd->intent.open.create_mode, |
a6ce4932 SF |
682 | nd->intent.open.flags, &oplock, |
683 | &fileHandle, xid); | |
8db14ca1 SF |
684 | /* |
685 | * The check below works around a bug in POSIX | |
686 | * open in samba versions 3.3.1 and earlier where | |
687 | * open could incorrectly fail with invalid parameter. | |
688 | * If either that or op not supported returned, follow | |
689 | * the normal lookup. | |
690 | */ | |
691 | if ((rc == 0) || (rc == -ENOENT)) | |
692 | posix_open = true; | |
693 | else if ((rc == -EINVAL) || (rc != -EOPNOTSUPP)) | |
694 | pTcon->broken_posix_open = true; | |
a6ce4932 SF |
695 | } |
696 | if (!posix_open) | |
697 | rc = cifs_get_inode_info_unix(&newInode, full_path, | |
698 | parent_dir_inode->i_sb, xid); | |
699 | } else | |
1da177e4 | 700 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 701 | parent_dir_inode->i_sb, xid, NULL); |
1da177e4 LT |
702 | |
703 | if ((rc == 0) && (newInode != NULL)) { | |
b92327fe SF |
704 | if (pTcon->nocase) |
705 | direntry->d_op = &cifs_ci_dentry_ops; | |
706 | else | |
707 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 708 | d_add(direntry, newInode); |
a6ce4932 SF |
709 | if (posix_open) |
710 | filp = lookup_instantiate_filp(nd, direntry, NULL); | |
5fdae1f6 | 711 | /* since paths are not looked up by component - the parent |
3abb9272 | 712 | directories are presumed to be good here */ |
1da177e4 LT |
713 | renew_parental_timestamps(direntry); |
714 | ||
715 | } else if (rc == -ENOENT) { | |
716 | rc = 0; | |
3abb9272 SF |
717 | direntry->d_time = jiffies; |
718 | if (pTcon->nocase) | |
719 | direntry->d_op = &cifs_ci_dentry_ops; | |
720 | else | |
721 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 722 | d_add(direntry, NULL); |
5fdae1f6 SF |
723 | /* if it was once a directory (but how can we tell?) we could do |
724 | shrink_dcache_parent(direntry); */ | |
ed2b9170 SF |
725 | } else if (rc != -EACCES) { |
726 | cERROR(1, ("Unexpected lookup error %d", rc)); | |
727 | /* We special case check for Access Denied - since that | |
728 | is a common return code */ | |
1da177e4 LT |
729 | } |
730 | ||
d14537f1 | 731 | kfree(full_path); |
1da177e4 LT |
732 | FreeXid(xid); |
733 | return ERR_PTR(rc); | |
734 | } | |
735 | ||
1da177e4 LT |
736 | static int |
737 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
738 | { | |
739 | int isValid = 1; | |
740 | ||
1da177e4 | 741 | if (direntry->d_inode) { |
df2cf170 | 742 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 743 | return 0; |
1da177e4 | 744 | } else { |
3abb9272 SF |
745 | cFYI(1, ("neg dentry 0x%p name = %s", |
746 | direntry, direntry->d_name.name)); | |
5fdae1f6 | 747 | if (time_after(jiffies, direntry->d_time + HZ) || |
3abb9272 SF |
748 | !lookupCacheEnabled) { |
749 | d_drop(direntry); | |
750 | isValid = 0; | |
5fdae1f6 | 751 | } |
1da177e4 LT |
752 | } |
753 | ||
1da177e4 LT |
754 | return isValid; |
755 | } | |
756 | ||
757 | /* static int cifs_d_delete(struct dentry *direntry) | |
758 | { | |
759 | int rc = 0; | |
760 | ||
761 | cFYI(1, ("In cifs d_delete, name = %s", direntry->d_name.name)); | |
762 | ||
763 | return rc; | |
764 | } */ | |
765 | ||
4fd03e84 | 766 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 767 | .d_revalidate = cifs_d_revalidate, |
5fdae1f6 | 768 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 769 | }; |
b92327fe SF |
770 | |
771 | static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) | |
772 | { | |
773 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
774 | unsigned long hash; | |
775 | int i; | |
776 | ||
777 | hash = init_name_hash(); | |
778 | for (i = 0; i < q->len; i++) | |
779 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
780 | hash); | |
781 | q->hash = end_name_hash(hash); | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
786 | static int cifs_ci_compare(struct dentry *dentry, struct qstr *a, | |
787 | struct qstr *b) | |
788 | { | |
789 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
790 | ||
791 | if ((a->len == b->len) && | |
792 | (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) { | |
793 | /* | |
794 | * To preserve case, don't let an existing negative dentry's | |
795 | * case take precedence. If a is not a negative dentry, this | |
796 | * should have no side effects | |
797 | */ | |
c3291637 | 798 | memcpy((void *)a->name, b->name, a->len); |
b92327fe SF |
799 | return 0; |
800 | } | |
801 | return 1; | |
802 | } | |
803 | ||
4fd03e84 | 804 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
805 | .d_revalidate = cifs_d_revalidate, |
806 | .d_hash = cifs_ci_hash, | |
807 | .d_compare = cifs_ci_compare, | |
808 | }; |