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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> |
6ca9f3ba | 28 | #include <linux/file.h> |
1da177e4 LT |
29 | #include "cifsfs.h" |
30 | #include "cifspdu.h" | |
31 | #include "cifsglob.h" | |
32 | #include "cifsproto.h" | |
33 | #include "cifs_debug.h" | |
34 | #include "cifs_fs_sb.h" | |
35 | ||
99ee4dbd | 36 | static void |
1da177e4 LT |
37 | renew_parental_timestamps(struct dentry *direntry) |
38 | { | |
5fdae1f6 SF |
39 | /* BB check if there is a way to get the kernel to do this or if we |
40 | really need this */ | |
1da177e4 LT |
41 | do { |
42 | direntry->d_time = jiffies; | |
43 | direntry = direntry->d_parent; | |
5fdae1f6 | 44 | } while (!IS_ROOT(direntry)); |
1da177e4 LT |
45 | } |
46 | ||
47 | /* Note: caller must free return buffer */ | |
48 | char * | |
49 | build_path_from_dentry(struct dentry *direntry) | |
50 | { | |
51 | struct dentry *temp; | |
2fe87f02 SF |
52 | int namelen; |
53 | int pplen; | |
646dd539 | 54 | int dfsplen; |
1da177e4 | 55 | char *full_path; |
88274815 | 56 | char dirsep; |
646dd539 | 57 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 58 | |
5fdae1f6 | 59 | if (direntry == NULL) |
1da177e4 LT |
60 | return NULL; /* not much we can do if dentry is freed and |
61 | we need to reopen the file after it was closed implicitly | |
62 | when the server crashed */ | |
63 | ||
646dd539 SF |
64 | cifs_sb = CIFS_SB(direntry->d_sb); |
65 | dirsep = CIFS_DIR_SEP(cifs_sb); | |
66 | pplen = cifs_sb->prepathlen; | |
67 | if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS)) | |
68 | dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1); | |
69 | else | |
70 | dfsplen = 0; | |
1da177e4 | 71 | cifs_bp_rename_retry: |
646dd539 | 72 | namelen = pplen + dfsplen; |
1da177e4 LT |
73 | for (temp = direntry; !IS_ROOT(temp);) { |
74 | namelen += (1 + temp->d_name.len); | |
75 | temp = temp->d_parent; | |
5fdae1f6 | 76 | if (temp == NULL) { |
b6b38f70 | 77 | cERROR(1, "corrupt dentry"); |
1da177e4 LT |
78 | return NULL; |
79 | } | |
80 | } | |
81 | ||
82 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 83 | if (full_path == NULL) |
1da177e4 LT |
84 | return full_path; |
85 | full_path[namelen] = 0; /* trailing null */ | |
1da177e4 LT |
86 | for (temp = direntry; !IS_ROOT(temp);) { |
87 | namelen -= 1 + temp->d_name.len; | |
88 | if (namelen < 0) { | |
89 | break; | |
90 | } else { | |
7f57356b | 91 | full_path[namelen] = dirsep; |
1da177e4 LT |
92 | strncpy(full_path + namelen + 1, temp->d_name.name, |
93 | temp->d_name.len); | |
b6b38f70 | 94 | cFYI(0, "name: %s", full_path + namelen); |
1da177e4 LT |
95 | } |
96 | temp = temp->d_parent; | |
5fdae1f6 | 97 | if (temp == NULL) { |
b6b38f70 | 98 | cERROR(1, "corrupt dentry"); |
1da177e4 LT |
99 | kfree(full_path); |
100 | return NULL; | |
101 | } | |
102 | } | |
646dd539 | 103 | if (namelen != pplen + dfsplen) { |
b6b38f70 JP |
104 | cERROR(1, "did not end path lookup where expected namelen is %d", |
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 | ||
fae683f7 SJ |
133 | /* |
134 | * When called with struct file pointer set to NULL, there is no way we could | |
135 | * update file->private_data, but getting it stuck on openFileList provides a | |
136 | * way to access it from cifs_fill_filedata and thereby set file->private_data | |
137 | * from cifs_open. | |
138 | */ | |
086f68bd JL |
139 | struct cifsFileInfo * |
140 | cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, | |
141 | struct file *file, struct vfsmount *mnt, unsigned int oflags) | |
a6ce4932 SF |
142 | { |
143 | int oplock = 0; | |
144 | struct cifsFileInfo *pCifsFile; | |
145 | struct cifsInodeInfo *pCifsInode; | |
3bc303c2 | 146 | struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb); |
a6ce4932 SF |
147 | |
148 | pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
a6ce4932 | 149 | if (pCifsFile == NULL) |
086f68bd | 150 | return pCifsFile; |
a6ce4932 SF |
151 | |
152 | if (oplockEnabled) | |
153 | oplock = REQ_OPLOCK; | |
154 | ||
155 | pCifsFile->netfid = fileHandle; | |
156 | pCifsFile->pid = current->tgid; | |
48541bd3 | 157 | pCifsFile->pInode = igrab(newinode); |
3bc303c2 | 158 | pCifsFile->mnt = mnt; |
086f68bd | 159 | pCifsFile->pfile = file; |
a6ce4932 | 160 | pCifsFile->invalidHandle = false; |
bc8cd439 | 161 | pCifsFile->closePend = false; |
a6ce4932 SF |
162 | mutex_init(&pCifsFile->fh_mutex); |
163 | mutex_init(&pCifsFile->lock_mutex); | |
164 | INIT_LIST_HEAD(&pCifsFile->llist); | |
6ab409b5 | 165 | atomic_set(&pCifsFile->count, 1); |
3bc303c2 | 166 | slow_work_init(&pCifsFile->oplock_break, &cifs_oplock_break_ops); |
a6ce4932 | 167 | |
a6ce4932 | 168 | write_lock(&GlobalSMBSeslock); |
3bc303c2 | 169 | list_add(&pCifsFile->tlist, &cifs_sb->tcon->openFileList); |
a6ce4932 SF |
170 | pCifsInode = CIFS_I(newinode); |
171 | if (pCifsInode) { | |
172 | /* if readable file instance put first in list*/ | |
086f68bd JL |
173 | if (oflags & FMODE_READ) |
174 | list_add(&pCifsFile->flist, &pCifsInode->openFileList); | |
175 | else | |
a6ce4932 SF |
176 | list_add_tail(&pCifsFile->flist, |
177 | &pCifsInode->openFileList); | |
bc8cd439 | 178 | |
a6ce4932 SF |
179 | if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { |
180 | pCifsInode->clientCanCacheAll = true; | |
181 | pCifsInode->clientCanCacheRead = true; | |
b6b38f70 | 182 | cFYI(1, "Exclusive Oplock inode %p", newinode); |
a6ce4932 | 183 | } else if ((oplock & 0xF) == OPLOCK_READ) |
bc8cd439 | 184 | pCifsInode->clientCanCacheRead = true; |
a6ce4932 SF |
185 | } |
186 | write_unlock(&GlobalSMBSeslock); | |
086f68bd | 187 | |
6ca9f3ba JL |
188 | file->private_data = pCifsFile; |
189 | ||
086f68bd | 190 | return pCifsFile; |
a6ce4932 SF |
191 | } |
192 | ||
7fc8f4e9 | 193 | int cifs_posix_open(char *full_path, struct inode **pinode, |
2422f676 | 194 | struct super_block *sb, int mode, int oflags, |
fa588e0c | 195 | __u32 *poplock, __u16 *pnetfid, int xid) |
c3b2a0c6 SF |
196 | { |
197 | int rc; | |
c3b2a0c6 SF |
198 | FILE_UNIX_BASIC_INFO *presp_data; |
199 | __u32 posix_flags = 0; | |
fa588e0c | 200 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
cc0bad75 | 201 | struct cifs_fattr fattr; |
c3b2a0c6 | 202 | |
b6b38f70 | 203 | cFYI(1, "posix open %s", full_path); |
c3b2a0c6 SF |
204 | |
205 | presp_data = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
206 | if (presp_data == NULL) | |
207 | return -ENOMEM; | |
208 | ||
209 | /* So far cifs posix extensions can only map the following flags. | |
210 | There are other valid fmode oflags such as FMODE_LSEEK, FMODE_PREAD, but | |
211 | so far we do not seem to need them, and we can treat them as local only */ | |
212 | if ((oflags & (FMODE_READ | FMODE_WRITE)) == | |
213 | (FMODE_READ | FMODE_WRITE)) | |
214 | posix_flags = SMB_O_RDWR; | |
215 | else if (oflags & FMODE_READ) | |
216 | posix_flags = SMB_O_RDONLY; | |
217 | else if (oflags & FMODE_WRITE) | |
218 | posix_flags = SMB_O_WRONLY; | |
219 | if (oflags & O_CREAT) | |
220 | posix_flags |= SMB_O_CREAT; | |
221 | if (oflags & O_EXCL) | |
222 | posix_flags |= SMB_O_EXCL; | |
223 | if (oflags & O_TRUNC) | |
224 | posix_flags |= SMB_O_TRUNC; | |
6b2f3d1f CH |
225 | /* be safe and imply O_SYNC for O_DSYNC */ |
226 | if (oflags & O_DSYNC) | |
c3b2a0c6 SF |
227 | posix_flags |= SMB_O_SYNC; |
228 | if (oflags & O_DIRECTORY) | |
229 | posix_flags |= SMB_O_DIRECTORY; | |
230 | if (oflags & O_NOFOLLOW) | |
231 | posix_flags |= SMB_O_NOFOLLOW; | |
232 | if (oflags & O_DIRECT) | |
233 | posix_flags |= SMB_O_DIRECT; | |
234 | ||
703a3b8e | 235 | mode &= ~current_umask(); |
c3b2a0c6 | 236 | rc = CIFSPOSIXCreate(xid, cifs_sb->tcon, posix_flags, mode, |
590a3fe0 | 237 | pnetfid, presp_data, poplock, full_path, |
c3b2a0c6 SF |
238 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
239 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
240 | if (rc) | |
241 | goto posix_open_ret; | |
242 | ||
243 | if (presp_data->Type == cpu_to_le32(-1)) | |
244 | goto posix_open_ret; /* open ok, caller does qpathinfo */ | |
245 | ||
c3b2a0c6 SF |
246 | if (!pinode) |
247 | goto posix_open_ret; /* caller does not need info */ | |
248 | ||
cc0bad75 JL |
249 | cifs_unix_basic_to_fattr(&fattr, presp_data, cifs_sb); |
250 | ||
251 | /* get new inode and set it up */ | |
85a6dac5 | 252 | if (*pinode == NULL) { |
4065c802 | 253 | cifs_fill_uniqueid(sb, &fattr); |
fa588e0c | 254 | *pinode = cifs_iget(sb, &fattr); |
cc0bad75 JL |
255 | if (!*pinode) { |
256 | rc = -ENOMEM; | |
257 | goto posix_open_ret; | |
258 | } | |
259 | } else { | |
260 | cifs_fattr_to_inode(*pinode, &fattr); | |
85a6dac5 | 261 | } |
c3b2a0c6 SF |
262 | |
263 | posix_open_ret: | |
264 | kfree(presp_data); | |
265 | return rc; | |
266 | } | |
267 | ||
f818dd55 SF |
268 | static void setup_cifs_dentry(struct cifsTconInfo *tcon, |
269 | struct dentry *direntry, | |
270 | struct inode *newinode) | |
271 | { | |
272 | if (tcon->nocase) | |
273 | direntry->d_op = &cifs_ci_dentry_ops; | |
274 | else | |
275 | direntry->d_op = &cifs_dentry_ops; | |
276 | d_instantiate(direntry, newinode); | |
277 | } | |
278 | ||
3979877e | 279 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 LT |
280 | |
281 | int | |
282 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
283 | struct nameidata *nd) | |
284 | { | |
285 | int rc = -ENOENT; | |
286 | int xid; | |
67750fb9 | 287 | int create_options = CREATE_NOT_DIR; |
590a3fe0 | 288 | __u32 oplock = 0; |
c3b2a0c6 SF |
289 | int oflags; |
290 | /* | |
291 | * BB below access is probably too much for mknod to request | |
292 | * but we have to do query and setpathinfo so requesting | |
293 | * less could fail (unless we want to request getatr and setatr | |
294 | * permissions (only). At least for POSIX we do not have to | |
295 | * request so much. | |
296 | */ | |
1da177e4 LT |
297 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; |
298 | __u16 fileHandle; | |
299 | struct cifs_sb_info *cifs_sb; | |
f818dd55 | 300 | struct cifsTconInfo *tcon; |
1da177e4 | 301 | char *full_path = NULL; |
fb8c4b14 | 302 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 303 | struct inode *newinode = NULL; |
1da177e4 | 304 | int disposition = FILE_OVERWRITE_IF; |
1da177e4 LT |
305 | |
306 | xid = GetXid(); | |
307 | ||
308 | cifs_sb = CIFS_SB(inode->i_sb); | |
f818dd55 | 309 | tcon = cifs_sb->tcon; |
1da177e4 | 310 | |
1da177e4 | 311 | full_path = build_path_from_dentry(direntry); |
5fdae1f6 | 312 | if (full_path == NULL) { |
0f3bc09e | 313 | rc = -ENOMEM; |
1da177e4 | 314 | FreeXid(xid); |
0f3bc09e | 315 | return rc; |
1da177e4 LT |
316 | } |
317 | ||
c3b2a0c6 SF |
318 | if (oplockEnabled) |
319 | oplock = REQ_OPLOCK; | |
f818dd55 | 320 | |
c3b2a0c6 SF |
321 | if (nd && (nd->flags & LOOKUP_OPEN)) |
322 | oflags = nd->intent.open.flags; | |
323 | else | |
fa588e0c | 324 | oflags = FMODE_READ | SMB_O_CREAT; |
c3b2a0c6 SF |
325 | |
326 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && | |
327 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
328 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
fa588e0c | 329 | rc = cifs_posix_open(full_path, &newinode, |
fa588e0c | 330 | inode->i_sb, mode, oflags, &oplock, &fileHandle, xid); |
c3b2a0c6 SF |
331 | /* EIO could indicate that (posix open) operation is not |
332 | supported, despite what server claimed in capability | |
333 | negotation. EREMOTE indicates DFS junction, which is not | |
334 | handled in posix open */ | |
335 | ||
90e4ee5d | 336 | if (rc == 0) { |
90e4ee5d SF |
337 | if (newinode == NULL) /* query inode info */ |
338 | goto cifs_create_get_file_info; | |
339 | else /* success, no need to query */ | |
340 | goto cifs_create_set_dentry; | |
341 | } else if ((rc != -EIO) && (rc != -EREMOTE) && | |
703a3b8e | 342 | (rc != -EOPNOTSUPP) && (rc != -EINVAL)) |
c3b2a0c6 SF |
343 | goto cifs_create_out; |
344 | /* else fallthrough to retry, using older open call, this is | |
345 | case where server does not support this SMB level, and | |
346 | falsely claims capability (also get here for DFS case | |
347 | which should be rare for path not covered on files) */ | |
348 | } | |
e08fc045 | 349 | |
c3b2a0c6 SF |
350 | if (nd && (nd->flags & LOOKUP_OPEN)) { |
351 | /* if the file is going to stay open, then we | |
352 | need to set the desired access properly */ | |
e08fc045 MS |
353 | desiredAccess = 0; |
354 | if (oflags & FMODE_READ) | |
c3b2a0c6 | 355 | desiredAccess |= GENERIC_READ; /* is this too little? */ |
086f68bd | 356 | if (oflags & FMODE_WRITE) |
e08fc045 | 357 | desiredAccess |= GENERIC_WRITE; |
1da177e4 | 358 | |
5fdae1f6 | 359 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 360 | disposition = FILE_CREATE; |
5fdae1f6 | 361 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 362 | disposition = FILE_OVERWRITE_IF; |
5fdae1f6 | 363 | else if ((oflags & O_CREAT) == O_CREAT) |
1da177e4 | 364 | disposition = FILE_OPEN_IF; |
ad7a2926 | 365 | else |
b6b38f70 | 366 | cFYI(1, "Create flag not set in create function"); |
1da177e4 LT |
367 | } |
368 | ||
5fdae1f6 SF |
369 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
370 | ACLs */ | |
1da177e4 | 371 | |
5fdae1f6 SF |
372 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
373 | if (buf == NULL) { | |
1da177e4 LT |
374 | kfree(full_path); |
375 | FreeXid(xid); | |
376 | return -ENOMEM; | |
377 | } | |
67750fb9 | 378 | |
67750fb9 JL |
379 | /* |
380 | * if we're not using unix extensions, see if we need to set | |
381 | * ATTR_READONLY on the create call | |
382 | */ | |
f818dd55 | 383 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
384 | create_options |= CREATE_OPTION_READONLY; |
385 | ||
5fdae1f6 | 386 | if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS) |
f818dd55 | 387 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
67750fb9 | 388 | desiredAccess, create_options, |
737b758c SF |
389 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
390 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5bafd765 SF |
391 | else |
392 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
393 | ||
5fdae1f6 | 394 | if (rc == -EIO) { |
a9d02ad4 | 395 | /* old server, retry the open legacy style */ |
f818dd55 | 396 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
67750fb9 | 397 | desiredAccess, create_options, |
a9d02ad4 SF |
398 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
399 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5fdae1f6 | 400 | } |
1da177e4 | 401 | if (rc) { |
b6b38f70 | 402 | cFYI(1, "cifs_create returned 0x%x", rc); |
c3b2a0c6 SF |
403 | goto cifs_create_out; |
404 | } | |
405 | ||
406 | /* If Open reported that we actually created a file | |
407 | then we now have to set the mode if possible */ | |
408 | if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { | |
409 | struct cifs_unix_set_info_args args = { | |
4e1e7fb9 JL |
410 | .mode = mode, |
411 | .ctime = NO_CHANGE_64, | |
412 | .atime = NO_CHANGE_64, | |
413 | .mtime = NO_CHANGE_64, | |
414 | .device = 0, | |
c3b2a0c6 SF |
415 | }; |
416 | ||
417 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
418 | args.uid = (__u64) current_fsuid(); | |
419 | if (inode->i_mode & S_ISGID) | |
420 | args.gid = (__u64) inode->i_gid; | |
421 | else | |
422 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 423 | } else { |
c3b2a0c6 SF |
424 | args.uid = NO_CHANGE_64; |
425 | args.gid = NO_CHANGE_64; | |
1da177e4 | 426 | } |
01ea95e3 JL |
427 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, |
428 | cifs_sb->local_nls, | |
429 | cifs_sb->mnt_cifs_flags & | |
430 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
c3b2a0c6 SF |
431 | } else { |
432 | /* BB implement mode setting via Windows security | |
433 | descriptors e.g. */ | |
434 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ | |
435 | ||
436 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
437 | } | |
1da177e4 | 438 | |
c3b2a0c6 SF |
439 | cifs_create_get_file_info: |
440 | /* server might mask mode so we have to query for it */ | |
441 | if (tcon->unix_ext) | |
442 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
443 | inode->i_sb, xid); | |
444 | else { | |
445 | rc = cifs_get_inode_info(&newinode, full_path, buf, | |
446 | inode->i_sb, xid, &fileHandle); | |
447 | if (newinode) { | |
448 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
449 | newinode->i_mode = mode; | |
450 | if ((oplock & CIFS_CREATE_ACTION) && | |
451 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { | |
452 | newinode->i_uid = current_fsuid(); | |
453 | if (inode->i_mode & S_ISGID) | |
454 | newinode->i_gid = inode->i_gid; | |
455 | else | |
456 | newinode->i_gid = current_fsgid(); | |
6473a559 | 457 | } |
1da177e4 | 458 | } |
c3b2a0c6 | 459 | } |
1da177e4 | 460 | |
c3b2a0c6 SF |
461 | cifs_create_set_dentry: |
462 | if (rc == 0) | |
463 | setup_cifs_dentry(tcon, direntry, newinode); | |
464 | else | |
b6b38f70 | 465 | cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
c3b2a0c6 | 466 | |
2422f676 | 467 | if (newinode && nd && (nd->flags & LOOKUP_OPEN)) { |
fdb36038 | 468 | struct cifsFileInfo *pfile_info; |
6ca9f3ba JL |
469 | struct file *filp; |
470 | ||
471 | filp = lookup_instantiate_filp(nd, direntry, generic_file_open); | |
472 | if (IS_ERR(filp)) { | |
473 | rc = PTR_ERR(filp); | |
474 | CIFSSMBClose(xid, tcon, fileHandle); | |
475 | goto cifs_create_out; | |
476 | } | |
477 | ||
478 | pfile_info = cifs_new_fileinfo(newinode, fileHandle, filp, | |
fdb36038 | 479 | nd->path.mnt, oflags); |
6ca9f3ba JL |
480 | if (pfile_info == NULL) { |
481 | fput(filp); | |
482 | CIFSSMBClose(xid, tcon, fileHandle); | |
fdb36038 | 483 | rc = -ENOMEM; |
6ca9f3ba | 484 | } |
2422f676 JL |
485 | } else { |
486 | CIFSSMBClose(xid, tcon, fileHandle); | |
5fdae1f6 | 487 | } |
2422f676 | 488 | |
d14537f1 SF |
489 | cifs_create_out: |
490 | kfree(buf); | |
491 | kfree(full_path); | |
1da177e4 | 492 | FreeXid(xid); |
1da177e4 LT |
493 | return rc; |
494 | } | |
495 | ||
5fdae1f6 SF |
496 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
497 | dev_t device_number) | |
1da177e4 LT |
498 | { |
499 | int rc = -EPERM; | |
500 | int xid; | |
501 | struct cifs_sb_info *cifs_sb; | |
502 | struct cifsTconInfo *pTcon; | |
503 | char *full_path = NULL; | |
fb8c4b14 | 504 | struct inode *newinode = NULL; |
1da177e4 LT |
505 | |
506 | if (!old_valid_dev(device_number)) | |
507 | return -EINVAL; | |
508 | ||
509 | xid = GetXid(); | |
510 | ||
511 | cifs_sb = CIFS_SB(inode->i_sb); | |
512 | pTcon = cifs_sb->tcon; | |
513 | ||
1da177e4 | 514 | full_path = build_path_from_dentry(direntry); |
5fdae1f6 | 515 | if (full_path == NULL) |
1da177e4 | 516 | rc = -ENOMEM; |
c18c842b | 517 | else if (pTcon->unix_ext) { |
4e1e7fb9 | 518 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 519 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
520 | .ctime = NO_CHANGE_64, |
521 | .atime = NO_CHANGE_64, | |
522 | .mtime = NO_CHANGE_64, | |
523 | .device = device_number, | |
524 | }; | |
5fdae1f6 | 525 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
526 | args.uid = (__u64) current_fsuid(); |
527 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 528 | } else { |
4e1e7fb9 JL |
529 | args.uid = NO_CHANGE_64; |
530 | args.gid = NO_CHANGE_64; | |
1da177e4 | 531 | } |
01ea95e3 JL |
532 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
533 | cifs_sb->local_nls, | |
534 | cifs_sb->mnt_cifs_flags & | |
535 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 536 | |
5fdae1f6 | 537 | if (!rc) { |
1da177e4 | 538 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 539 | inode->i_sb, xid); |
b92327fe SF |
540 | if (pTcon->nocase) |
541 | direntry->d_op = &cifs_ci_dentry_ops; | |
542 | else | |
543 | direntry->d_op = &cifs_dentry_ops; | |
5fdae1f6 | 544 | if (rc == 0) |
1da177e4 LT |
545 | d_instantiate(direntry, newinode); |
546 | } | |
d7245c2c | 547 | } else { |
5fdae1f6 | 548 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
eda3c029 SF |
549 | int oplock = 0; |
550 | u16 fileHandle; | |
ad7a2926 | 551 | FILE_ALL_INFO *buf; |
d7245c2c | 552 | |
b6b38f70 | 553 | cFYI(1, "sfu compat create special file"); |
d7245c2c | 554 | |
5fdae1f6 SF |
555 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
556 | if (buf == NULL) { | |
eda3c029 | 557 | kfree(full_path); |
0f3bc09e | 558 | rc = -ENOMEM; |
eda3c029 | 559 | FreeXid(xid); |
0f3bc09e | 560 | return rc; |
eda3c029 SF |
561 | } |
562 | ||
563 | rc = CIFSSMBOpen(xid, pTcon, full_path, | |
564 | FILE_CREATE, /* fail if exists */ | |
5fdae1f6 | 565 | GENERIC_WRITE /* BB would |
eda3c029 SF |
566 | WRITE_OWNER | WRITE_DAC be better? */, |
567 | /* Create a file and set the | |
568 | file attribute to SYSTEM */ | |
569 | CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
570 | &fileHandle, &oplock, buf, | |
571 | cifs_sb->local_nls, | |
5fdae1f6 | 572 | cifs_sb->mnt_cifs_flags & |
eda3c029 SF |
573 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
574 | ||
5bafd765 SF |
575 | /* BB FIXME - add handling for backlevel servers |
576 | which need legacy open and check for all | |
5fdae1f6 SF |
577 | calls to SMBOpen for fallback to SMBLeagcyOpen */ |
578 | if (!rc) { | |
eda3c029 | 579 | /* BB Do not bother to decode buf since no |
86c96b4b SF |
580 | local inode yet to put timestamps in, |
581 | but we can reuse it safely */ | |
77159b4d | 582 | unsigned int bytes_written; |
86c96b4b SF |
583 | struct win_dev *pdev; |
584 | pdev = (struct win_dev *)buf; | |
5fdae1f6 | 585 | if (S_ISCHR(mode)) { |
86c96b4b SF |
586 | memcpy(pdev->type, "IntxCHR", 8); |
587 | pdev->major = | |
588 | cpu_to_le64(MAJOR(device_number)); | |
5fdae1f6 | 589 | pdev->minor = |
86c96b4b SF |
590 | cpu_to_le64(MINOR(device_number)); |
591 | rc = CIFSSMBWrite(xid, pTcon, | |
592 | fileHandle, | |
593 | sizeof(struct win_dev), | |
594 | 0, &bytes_written, (char *)pdev, | |
595 | NULL, 0); | |
5fdae1f6 | 596 | } else if (S_ISBLK(mode)) { |
86c96b4b SF |
597 | memcpy(pdev->type, "IntxBLK", 8); |
598 | pdev->major = | |
599 | cpu_to_le64(MAJOR(device_number)); | |
600 | pdev->minor = | |
601 | cpu_to_le64(MINOR(device_number)); | |
602 | rc = CIFSSMBWrite(xid, pTcon, | |
603 | fileHandle, | |
604 | sizeof(struct win_dev), | |
605 | 0, &bytes_written, (char *)pdev, | |
606 | NULL, 0); | |
607 | } /* else if(S_ISFIFO */ | |
eda3c029 SF |
608 | CIFSSMBClose(xid, pTcon, fileHandle); |
609 | d_drop(direntry); | |
610 | } | |
611 | kfree(buf); | |
d7245c2c SF |
612 | /* add code here to set EAs */ |
613 | } | |
1da177e4 LT |
614 | } |
615 | ||
d14537f1 | 616 | kfree(full_path); |
1da177e4 | 617 | FreeXid(xid); |
1da177e4 LT |
618 | return rc; |
619 | } | |
620 | ||
1da177e4 | 621 | struct dentry * |
5fdae1f6 SF |
622 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
623 | struct nameidata *nd) | |
1da177e4 LT |
624 | { |
625 | int xid; | |
626 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
590a3fe0 | 627 | __u32 oplock = 0; |
a6ce4932 SF |
628 | __u16 fileHandle = 0; |
629 | bool posix_open = false; | |
1da177e4 LT |
630 | struct cifs_sb_info *cifs_sb; |
631 | struct cifsTconInfo *pTcon; | |
2422f676 | 632 | struct cifsFileInfo *cfile; |
1da177e4 LT |
633 | struct inode *newInode = NULL; |
634 | char *full_path = NULL; | |
a6ce4932 | 635 | struct file *filp; |
1da177e4 LT |
636 | |
637 | xid = GetXid(); | |
638 | ||
b6b38f70 JP |
639 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", |
640 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 641 | |
1da177e4 LT |
642 | /* check whether path exists */ |
643 | ||
644 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
645 | pTcon = cifs_sb->tcon; | |
646 | ||
296034f7 SF |
647 | /* |
648 | * Don't allow the separator character in a path component. | |
649 | * The VFS will not allow "/", but "\" is allowed by posix. | |
650 | */ | |
651 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
652 | int i; | |
653 | for (i = 0; i < direntry->d_name.len; i++) | |
654 | if (direntry->d_name.name[i] == '\\') { | |
b6b38f70 | 655 | cFYI(1, "Invalid file name"); |
296034f7 SF |
656 | FreeXid(xid); |
657 | return ERR_PTR(-EINVAL); | |
658 | } | |
659 | } | |
660 | ||
5ddf1e0f JL |
661 | /* |
662 | * O_EXCL: optimize away the lookup, but don't hash the dentry. Let | |
663 | * the VFS handle the create. | |
664 | */ | |
8e6c0332 | 665 | if (nd && (nd->flags & LOOKUP_EXCL)) { |
5ddf1e0f | 666 | d_instantiate(direntry, NULL); |
2f81e752 | 667 | return NULL; |
5ddf1e0f JL |
668 | } |
669 | ||
1da177e4 LT |
670 | /* can not grab the rename sem here since it would |
671 | deadlock in the cases (beginning of sys_rename itself) | |
672 | in which we already have the sb rename sem */ | |
673 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 674 | if (full_path == NULL) { |
1da177e4 LT |
675 | FreeXid(xid); |
676 | return ERR_PTR(-ENOMEM); | |
677 | } | |
678 | ||
679 | if (direntry->d_inode != NULL) { | |
b6b38f70 | 680 | cFYI(1, "non-NULL inode in lookup"); |
1da177e4 | 681 | } else { |
b6b38f70 | 682 | cFYI(1, "NULL inode in lookup"); |
1da177e4 | 683 | } |
b6b38f70 | 684 | cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); |
1da177e4 | 685 | |
8db14ca1 SF |
686 | /* Posix open is only called (at lookup time) for file create now. |
687 | * For opens (rather than creates), because we do not know if it | |
688 | * is a file or directory yet, and current Samba no longer allows | |
689 | * us to do posix open on dirs, we could end up wasting an open call | |
690 | * on what turns out to be a dir. For file opens, we wait to call posix | |
691 | * open till cifs_open. It could be added here (lookup) in the future | |
692 | * but the performance tradeoff of the extra network request when EISDIR | |
693 | * or EACCES is returned would have to be weighed against the 50% | |
694 | * reduction in network traffic in the other paths. | |
695 | */ | |
a6ce4932 | 696 | if (pTcon->unix_ext) { |
8e6c0332 | 697 | if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) && |
8db14ca1 SF |
698 | (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && |
699 | (nd->intent.open.flags & O_CREAT)) { | |
2422f676 | 700 | rc = cifs_posix_open(full_path, &newInode, |
fa588e0c | 701 | parent_dir_inode->i_sb, |
703a3b8e | 702 | nd->intent.open.create_mode, |
a6ce4932 SF |
703 | nd->intent.open.flags, &oplock, |
704 | &fileHandle, xid); | |
8db14ca1 SF |
705 | /* |
706 | * The check below works around a bug in POSIX | |
707 | * open in samba versions 3.3.1 and earlier where | |
708 | * open could incorrectly fail with invalid parameter. | |
709 | * If either that or op not supported returned, follow | |
710 | * the normal lookup. | |
711 | */ | |
712 | if ((rc == 0) || (rc == -ENOENT)) | |
713 | posix_open = true; | |
714 | else if ((rc == -EINVAL) || (rc != -EOPNOTSUPP)) | |
715 | pTcon->broken_posix_open = true; | |
a6ce4932 SF |
716 | } |
717 | if (!posix_open) | |
718 | rc = cifs_get_inode_info_unix(&newInode, full_path, | |
719 | parent_dir_inode->i_sb, xid); | |
720 | } else | |
1da177e4 | 721 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 722 | parent_dir_inode->i_sb, xid, NULL); |
1da177e4 LT |
723 | |
724 | if ((rc == 0) && (newInode != NULL)) { | |
b92327fe SF |
725 | if (pTcon->nocase) |
726 | direntry->d_op = &cifs_ci_dentry_ops; | |
727 | else | |
728 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 729 | d_add(direntry, newInode); |
2422f676 | 730 | if (posix_open) { |
6ca9f3ba JL |
731 | filp = lookup_instantiate_filp(nd, direntry, |
732 | generic_file_open); | |
733 | if (IS_ERR(filp)) { | |
734 | rc = PTR_ERR(filp); | |
735 | CIFSSMBClose(xid, pTcon, fileHandle); | |
736 | goto lookup_out; | |
737 | } | |
738 | ||
739 | cfile = cifs_new_fileinfo(newInode, fileHandle, filp, | |
2422f676 JL |
740 | nd->path.mnt, |
741 | nd->intent.open.flags); | |
742 | if (cfile == NULL) { | |
6ca9f3ba | 743 | fput(filp); |
2422f676 JL |
744 | CIFSSMBClose(xid, pTcon, fileHandle); |
745 | rc = -ENOMEM; | |
746 | goto lookup_out; | |
747 | } | |
2422f676 | 748 | } |
5fdae1f6 | 749 | /* since paths are not looked up by component - the parent |
3abb9272 | 750 | directories are presumed to be good here */ |
1da177e4 LT |
751 | renew_parental_timestamps(direntry); |
752 | ||
753 | } else if (rc == -ENOENT) { | |
754 | rc = 0; | |
3abb9272 SF |
755 | direntry->d_time = jiffies; |
756 | if (pTcon->nocase) | |
757 | direntry->d_op = &cifs_ci_dentry_ops; | |
758 | else | |
759 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 760 | d_add(direntry, NULL); |
5fdae1f6 SF |
761 | /* if it was once a directory (but how can we tell?) we could do |
762 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 763 | } else if (rc != -EACCES) { |
b6b38f70 | 764 | cERROR(1, "Unexpected lookup error %d", rc); |
ed2b9170 SF |
765 | /* We special case check for Access Denied - since that |
766 | is a common return code */ | |
1da177e4 LT |
767 | } |
768 | ||
2422f676 | 769 | lookup_out: |
d14537f1 | 770 | kfree(full_path); |
1da177e4 LT |
771 | FreeXid(xid); |
772 | return ERR_PTR(rc); | |
773 | } | |
774 | ||
1da177e4 LT |
775 | static int |
776 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
777 | { | |
778 | int isValid = 1; | |
779 | ||
1da177e4 | 780 | if (direntry->d_inode) { |
df2cf170 | 781 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 782 | return 0; |
1da177e4 | 783 | } else { |
b6b38f70 JP |
784 | cFYI(1, "neg dentry 0x%p name = %s", |
785 | direntry, direntry->d_name.name); | |
5fdae1f6 | 786 | if (time_after(jiffies, direntry->d_time + HZ) || |
3abb9272 SF |
787 | !lookupCacheEnabled) { |
788 | d_drop(direntry); | |
789 | isValid = 0; | |
5fdae1f6 | 790 | } |
1da177e4 LT |
791 | } |
792 | ||
1da177e4 LT |
793 | return isValid; |
794 | } | |
795 | ||
796 | /* static int cifs_d_delete(struct dentry *direntry) | |
797 | { | |
798 | int rc = 0; | |
799 | ||
b6b38f70 | 800 | cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
1da177e4 LT |
801 | |
802 | return rc; | |
803 | } */ | |
804 | ||
4fd03e84 | 805 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 806 | .d_revalidate = cifs_d_revalidate, |
5fdae1f6 | 807 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 808 | }; |
b92327fe SF |
809 | |
810 | static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) | |
811 | { | |
812 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
813 | unsigned long hash; | |
814 | int i; | |
815 | ||
816 | hash = init_name_hash(); | |
817 | for (i = 0; i < q->len; i++) | |
818 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
819 | hash); | |
820 | q->hash = end_name_hash(hash); | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | static int cifs_ci_compare(struct dentry *dentry, struct qstr *a, | |
826 | struct qstr *b) | |
827 | { | |
828 | struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; | |
829 | ||
830 | if ((a->len == b->len) && | |
831 | (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) { | |
832 | /* | |
833 | * To preserve case, don't let an existing negative dentry's | |
834 | * case take precedence. If a is not a negative dentry, this | |
835 | * should have no side effects | |
836 | */ | |
c3291637 | 837 | memcpy((void *)a->name, b->name, a->len); |
b92327fe SF |
838 | return 0; |
839 | } | |
840 | return 1; | |
841 | } | |
842 | ||
4fd03e84 | 843 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
844 | .d_revalidate = cifs_d_revalidate, |
845 | .d_hash = cifs_ci_hash, | |
846 | .d_compare = cifs_ci_compare, | |
847 | }; |