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> |
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; |
0d424ad0 JL |
57 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
58 | struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); | |
1da177e4 | 59 | |
5fdae1f6 | 60 | if (direntry == NULL) |
1da177e4 LT |
61 | return NULL; /* not much we can do if dentry is freed and |
62 | we need to reopen the file after it was closed implicitly | |
63 | when the server crashed */ | |
64 | ||
646dd539 SF |
65 | dirsep = CIFS_DIR_SEP(cifs_sb); |
66 | pplen = cifs_sb->prepathlen; | |
0d424ad0 JL |
67 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
68 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
646dd539 SF |
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) { | |
0d424ad0 | 120 | strncpy(full_path, tcon->treeName, dfsplen); |
646dd539 SF |
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 | ||
f818dd55 SF |
133 | static void setup_cifs_dentry(struct cifsTconInfo *tcon, |
134 | struct dentry *direntry, | |
135 | struct inode *newinode) | |
136 | { | |
137 | if (tcon->nocase) | |
fb045adb | 138 | d_set_d_op(direntry, &cifs_ci_dentry_ops); |
f818dd55 | 139 | else |
fb045adb | 140 | d_set_d_op(direntry, &cifs_dentry_ops); |
f818dd55 SF |
141 | d_instantiate(direntry, newinode); |
142 | } | |
143 | ||
3979877e | 144 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 LT |
145 | |
146 | int | |
147 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
148 | struct nameidata *nd) | |
149 | { | |
150 | int rc = -ENOENT; | |
151 | int xid; | |
67750fb9 | 152 | int create_options = CREATE_NOT_DIR; |
590a3fe0 | 153 | __u32 oplock = 0; |
c3b2a0c6 SF |
154 | int oflags; |
155 | /* | |
156 | * BB below access is probably too much for mknod to request | |
157 | * but we have to do query and setpathinfo so requesting | |
158 | * less could fail (unless we want to request getatr and setatr | |
159 | * permissions (only). At least for POSIX we do not have to | |
160 | * request so much. | |
161 | */ | |
1da177e4 LT |
162 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; |
163 | __u16 fileHandle; | |
164 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 165 | struct tcon_link *tlink; |
f818dd55 | 166 | struct cifsTconInfo *tcon; |
1da177e4 | 167 | char *full_path = NULL; |
fb8c4b14 | 168 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 169 | struct inode *newinode = NULL; |
1da177e4 | 170 | int disposition = FILE_OVERWRITE_IF; |
1da177e4 LT |
171 | |
172 | xid = GetXid(); | |
173 | ||
174 | cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 JL |
175 | tlink = cifs_sb_tlink(cifs_sb); |
176 | if (IS_ERR(tlink)) { | |
177 | FreeXid(xid); | |
178 | return PTR_ERR(tlink); | |
1da177e4 | 179 | } |
7ffec372 | 180 | tcon = tlink_tcon(tlink); |
1da177e4 | 181 | |
c3b2a0c6 SF |
182 | if (oplockEnabled) |
183 | oplock = REQ_OPLOCK; | |
f818dd55 | 184 | |
c3b2a0c6 | 185 | if (nd && (nd->flags & LOOKUP_OPEN)) |
608712fe | 186 | oflags = nd->intent.open.file->f_flags; |
c3b2a0c6 | 187 | else |
608712fe | 188 | oflags = O_RDONLY | O_CREAT; |
c3b2a0c6 | 189 | |
7ffec372 JL |
190 | full_path = build_path_from_dentry(direntry); |
191 | if (full_path == NULL) { | |
192 | rc = -ENOMEM; | |
193 | goto cifs_create_out; | |
194 | } | |
195 | ||
c3b2a0c6 SF |
196 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && |
197 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
198 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
fa588e0c | 199 | rc = cifs_posix_open(full_path, &newinode, |
fa588e0c | 200 | inode->i_sb, mode, oflags, &oplock, &fileHandle, xid); |
c3b2a0c6 SF |
201 | /* EIO could indicate that (posix open) operation is not |
202 | supported, despite what server claimed in capability | |
203 | negotation. EREMOTE indicates DFS junction, which is not | |
204 | handled in posix open */ | |
205 | ||
90e4ee5d | 206 | if (rc == 0) { |
90e4ee5d SF |
207 | if (newinode == NULL) /* query inode info */ |
208 | goto cifs_create_get_file_info; | |
209 | else /* success, no need to query */ | |
210 | goto cifs_create_set_dentry; | |
211 | } else if ((rc != -EIO) && (rc != -EREMOTE) && | |
703a3b8e | 212 | (rc != -EOPNOTSUPP) && (rc != -EINVAL)) |
c3b2a0c6 SF |
213 | goto cifs_create_out; |
214 | /* else fallthrough to retry, using older open call, this is | |
215 | case where server does not support this SMB level, and | |
216 | falsely claims capability (also get here for DFS case | |
217 | which should be rare for path not covered on files) */ | |
218 | } | |
e08fc045 | 219 | |
c3b2a0c6 SF |
220 | if (nd && (nd->flags & LOOKUP_OPEN)) { |
221 | /* if the file is going to stay open, then we | |
222 | need to set the desired access properly */ | |
e08fc045 | 223 | desiredAccess = 0; |
608712fe | 224 | if (OPEN_FMODE(oflags) & FMODE_READ) |
c3b2a0c6 | 225 | desiredAccess |= GENERIC_READ; /* is this too little? */ |
608712fe | 226 | if (OPEN_FMODE(oflags) & FMODE_WRITE) |
e08fc045 | 227 | desiredAccess |= GENERIC_WRITE; |
1da177e4 | 228 | |
5fdae1f6 | 229 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 230 | disposition = FILE_CREATE; |
5fdae1f6 | 231 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 232 | disposition = FILE_OVERWRITE_IF; |
5fdae1f6 | 233 | else if ((oflags & O_CREAT) == O_CREAT) |
1da177e4 | 234 | disposition = FILE_OPEN_IF; |
ad7a2926 | 235 | else |
b6b38f70 | 236 | cFYI(1, "Create flag not set in create function"); |
1da177e4 LT |
237 | } |
238 | ||
5fdae1f6 SF |
239 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
240 | ACLs */ | |
1da177e4 | 241 | |
5fdae1f6 SF |
242 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
243 | if (buf == NULL) { | |
232341ba JL |
244 | rc = -ENOMEM; |
245 | goto cifs_create_out; | |
1da177e4 | 246 | } |
67750fb9 | 247 | |
67750fb9 JL |
248 | /* |
249 | * if we're not using unix extensions, see if we need to set | |
250 | * ATTR_READONLY on the create call | |
251 | */ | |
f818dd55 | 252 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
253 | create_options |= CREATE_OPTION_READONLY; |
254 | ||
a6e8a845 | 255 | if (tcon->ses->capabilities & CAP_NT_SMBS) |
f818dd55 | 256 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
67750fb9 | 257 | desiredAccess, create_options, |
737b758c SF |
258 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
259 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5bafd765 SF |
260 | else |
261 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
262 | ||
5fdae1f6 | 263 | if (rc == -EIO) { |
a9d02ad4 | 264 | /* old server, retry the open legacy style */ |
f818dd55 | 265 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
67750fb9 | 266 | desiredAccess, create_options, |
a9d02ad4 SF |
267 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
268 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5fdae1f6 | 269 | } |
1da177e4 | 270 | if (rc) { |
b6b38f70 | 271 | cFYI(1, "cifs_create returned 0x%x", rc); |
c3b2a0c6 SF |
272 | goto cifs_create_out; |
273 | } | |
274 | ||
275 | /* If Open reported that we actually created a file | |
276 | then we now have to set the mode if possible */ | |
277 | if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { | |
278 | struct cifs_unix_set_info_args args = { | |
4e1e7fb9 JL |
279 | .mode = mode, |
280 | .ctime = NO_CHANGE_64, | |
281 | .atime = NO_CHANGE_64, | |
282 | .mtime = NO_CHANGE_64, | |
283 | .device = 0, | |
c3b2a0c6 SF |
284 | }; |
285 | ||
286 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
287 | args.uid = (__u64) current_fsuid(); | |
288 | if (inode->i_mode & S_ISGID) | |
289 | args.gid = (__u64) inode->i_gid; | |
290 | else | |
291 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 292 | } else { |
c3b2a0c6 SF |
293 | args.uid = NO_CHANGE_64; |
294 | args.gid = NO_CHANGE_64; | |
1da177e4 | 295 | } |
01ea95e3 JL |
296 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, |
297 | cifs_sb->local_nls, | |
298 | cifs_sb->mnt_cifs_flags & | |
299 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
c3b2a0c6 SF |
300 | } else { |
301 | /* BB implement mode setting via Windows security | |
302 | descriptors e.g. */ | |
303 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ | |
304 | ||
305 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
306 | } | |
1da177e4 | 307 | |
c3b2a0c6 SF |
308 | cifs_create_get_file_info: |
309 | /* server might mask mode so we have to query for it */ | |
310 | if (tcon->unix_ext) | |
311 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
312 | inode->i_sb, xid); | |
313 | else { | |
314 | rc = cifs_get_inode_info(&newinode, full_path, buf, | |
315 | inode->i_sb, xid, &fileHandle); | |
316 | if (newinode) { | |
317 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
318 | newinode->i_mode = mode; | |
319 | if ((oplock & CIFS_CREATE_ACTION) && | |
320 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { | |
321 | newinode->i_uid = current_fsuid(); | |
322 | if (inode->i_mode & S_ISGID) | |
323 | newinode->i_gid = inode->i_gid; | |
324 | else | |
325 | newinode->i_gid = current_fsgid(); | |
6473a559 | 326 | } |
1da177e4 | 327 | } |
c3b2a0c6 | 328 | } |
1da177e4 | 329 | |
c3b2a0c6 SF |
330 | cifs_create_set_dentry: |
331 | if (rc == 0) | |
332 | setup_cifs_dentry(tcon, direntry, newinode); | |
333 | else | |
b6b38f70 | 334 | cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
c3b2a0c6 | 335 | |
2422f676 | 336 | if (newinode && nd && (nd->flags & LOOKUP_OPEN)) { |
fdb36038 | 337 | struct cifsFileInfo *pfile_info; |
6ca9f3ba JL |
338 | struct file *filp; |
339 | ||
340 | filp = lookup_instantiate_filp(nd, direntry, generic_file_open); | |
341 | if (IS_ERR(filp)) { | |
342 | rc = PTR_ERR(filp); | |
343 | CIFSSMBClose(xid, tcon, fileHandle); | |
344 | goto cifs_create_out; | |
345 | } | |
346 | ||
abfe1eed | 347 | pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock); |
6ca9f3ba JL |
348 | if (pfile_info == NULL) { |
349 | fput(filp); | |
350 | CIFSSMBClose(xid, tcon, fileHandle); | |
fdb36038 | 351 | rc = -ENOMEM; |
6ca9f3ba | 352 | } |
2422f676 JL |
353 | } else { |
354 | CIFSSMBClose(xid, tcon, fileHandle); | |
5fdae1f6 | 355 | } |
2422f676 | 356 | |
d14537f1 SF |
357 | cifs_create_out: |
358 | kfree(buf); | |
359 | kfree(full_path); | |
7ffec372 | 360 | cifs_put_tlink(tlink); |
1da177e4 | 361 | FreeXid(xid); |
1da177e4 LT |
362 | return rc; |
363 | } | |
364 | ||
5fdae1f6 SF |
365 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
366 | dev_t device_number) | |
1da177e4 LT |
367 | { |
368 | int rc = -EPERM; | |
369 | int xid; | |
370 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 371 | struct tcon_link *tlink; |
1da177e4 LT |
372 | struct cifsTconInfo *pTcon; |
373 | char *full_path = NULL; | |
fb8c4b14 | 374 | struct inode *newinode = NULL; |
5d9ac7fd JL |
375 | int oplock = 0; |
376 | u16 fileHandle; | |
377 | FILE_ALL_INFO *buf = NULL; | |
378 | unsigned int bytes_written; | |
379 | struct win_dev *pdev; | |
1da177e4 LT |
380 | |
381 | if (!old_valid_dev(device_number)) | |
382 | return -EINVAL; | |
383 | ||
1da177e4 | 384 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
385 | tlink = cifs_sb_tlink(cifs_sb); |
386 | if (IS_ERR(tlink)) | |
387 | return PTR_ERR(tlink); | |
388 | ||
389 | pTcon = tlink_tcon(tlink); | |
390 | ||
391 | xid = GetXid(); | |
1da177e4 | 392 | |
1da177e4 | 393 | full_path = build_path_from_dentry(direntry); |
5d9ac7fd | 394 | if (full_path == NULL) { |
1da177e4 | 395 | rc = -ENOMEM; |
5d9ac7fd JL |
396 | goto mknod_out; |
397 | } | |
398 | ||
399 | if (pTcon->unix_ext) { | |
4e1e7fb9 | 400 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 401 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
402 | .ctime = NO_CHANGE_64, |
403 | .atime = NO_CHANGE_64, | |
404 | .mtime = NO_CHANGE_64, | |
405 | .device = device_number, | |
406 | }; | |
5fdae1f6 | 407 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
408 | args.uid = (__u64) current_fsuid(); |
409 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 410 | } else { |
4e1e7fb9 JL |
411 | args.uid = NO_CHANGE_64; |
412 | args.gid = NO_CHANGE_64; | |
1da177e4 | 413 | } |
01ea95e3 JL |
414 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
415 | cifs_sb->local_nls, | |
416 | cifs_sb->mnt_cifs_flags & | |
417 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5d9ac7fd JL |
418 | if (rc) |
419 | goto mknod_out; | |
1da177e4 | 420 | |
5d9ac7fd | 421 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 422 | inode->i_sb, xid); |
5d9ac7fd | 423 | if (pTcon->nocase) |
fb045adb | 424 | d_set_d_op(direntry, &cifs_ci_dentry_ops); |
5d9ac7fd | 425 | else |
fb045adb | 426 | d_set_d_op(direntry, &cifs_dentry_ops); |
eda3c029 | 427 | |
5d9ac7fd JL |
428 | if (rc == 0) |
429 | d_instantiate(direntry, newinode); | |
430 | goto mknod_out; | |
1da177e4 LT |
431 | } |
432 | ||
5d9ac7fd JL |
433 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) |
434 | goto mknod_out; | |
435 | ||
436 | ||
437 | cFYI(1, "sfu compat create special file"); | |
438 | ||
439 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
440 | if (buf == NULL) { | |
441 | kfree(full_path); | |
442 | rc = -ENOMEM; | |
443 | FreeXid(xid); | |
444 | return rc; | |
445 | } | |
446 | ||
447 | /* FIXME: would WRITE_OWNER | WRITE_DAC be better? */ | |
448 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, | |
449 | GENERIC_WRITE, CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
450 | &fileHandle, &oplock, buf, cifs_sb->local_nls, | |
451 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
452 | if (rc) | |
453 | goto mknod_out; | |
454 | ||
455 | /* BB Do not bother to decode buf since no local inode yet to put | |
456 | * timestamps in, but we can reuse it safely */ | |
457 | ||
458 | pdev = (struct win_dev *)buf; | |
459 | if (S_ISCHR(mode)) { | |
460 | memcpy(pdev->type, "IntxCHR", 8); | |
461 | pdev->major = | |
462 | cpu_to_le64(MAJOR(device_number)); | |
463 | pdev->minor = | |
464 | cpu_to_le64(MINOR(device_number)); | |
465 | rc = CIFSSMBWrite(xid, pTcon, | |
466 | fileHandle, | |
467 | sizeof(struct win_dev), | |
468 | 0, &bytes_written, (char *)pdev, | |
469 | NULL, 0); | |
470 | } else if (S_ISBLK(mode)) { | |
471 | memcpy(pdev->type, "IntxBLK", 8); | |
472 | pdev->major = | |
473 | cpu_to_le64(MAJOR(device_number)); | |
474 | pdev->minor = | |
475 | cpu_to_le64(MINOR(device_number)); | |
476 | rc = CIFSSMBWrite(xid, pTcon, | |
477 | fileHandle, | |
478 | sizeof(struct win_dev), | |
479 | 0, &bytes_written, (char *)pdev, | |
480 | NULL, 0); | |
481 | } /* else if (S_ISFIFO) */ | |
482 | CIFSSMBClose(xid, pTcon, fileHandle); | |
483 | d_drop(direntry); | |
484 | ||
485 | /* FIXME: add code here to set EAs */ | |
486 | ||
487 | mknod_out: | |
d14537f1 | 488 | kfree(full_path); |
5d9ac7fd | 489 | kfree(buf); |
1da177e4 | 490 | FreeXid(xid); |
7ffec372 | 491 | cifs_put_tlink(tlink); |
1da177e4 LT |
492 | return rc; |
493 | } | |
494 | ||
1da177e4 | 495 | struct dentry * |
5fdae1f6 SF |
496 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
497 | struct nameidata *nd) | |
1da177e4 LT |
498 | { |
499 | int xid; | |
500 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
590a3fe0 | 501 | __u32 oplock = 0; |
a6ce4932 SF |
502 | __u16 fileHandle = 0; |
503 | bool posix_open = false; | |
1da177e4 | 504 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 505 | struct tcon_link *tlink; |
1da177e4 | 506 | struct cifsTconInfo *pTcon; |
2422f676 | 507 | struct cifsFileInfo *cfile; |
1da177e4 LT |
508 | struct inode *newInode = NULL; |
509 | char *full_path = NULL; | |
a6ce4932 | 510 | struct file *filp; |
1da177e4 LT |
511 | |
512 | xid = GetXid(); | |
513 | ||
b6b38f70 JP |
514 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", |
515 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 516 | |
1da177e4 LT |
517 | /* check whether path exists */ |
518 | ||
519 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
7ffec372 JL |
520 | tlink = cifs_sb_tlink(cifs_sb); |
521 | if (IS_ERR(tlink)) { | |
522 | FreeXid(xid); | |
523 | return (struct dentry *)tlink; | |
524 | } | |
525 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 526 | |
296034f7 SF |
527 | /* |
528 | * Don't allow the separator character in a path component. | |
529 | * The VFS will not allow "/", but "\" is allowed by posix. | |
530 | */ | |
531 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
532 | int i; | |
533 | for (i = 0; i < direntry->d_name.len; i++) | |
534 | if (direntry->d_name.name[i] == '\\') { | |
b6b38f70 | 535 | cFYI(1, "Invalid file name"); |
7ffec372 JL |
536 | rc = -EINVAL; |
537 | goto lookup_out; | |
296034f7 SF |
538 | } |
539 | } | |
540 | ||
5ddf1e0f JL |
541 | /* |
542 | * O_EXCL: optimize away the lookup, but don't hash the dentry. Let | |
543 | * the VFS handle the create. | |
544 | */ | |
8e6c0332 | 545 | if (nd && (nd->flags & LOOKUP_EXCL)) { |
5ddf1e0f | 546 | d_instantiate(direntry, NULL); |
7ffec372 JL |
547 | rc = 0; |
548 | goto lookup_out; | |
5ddf1e0f JL |
549 | } |
550 | ||
1da177e4 LT |
551 | /* can not grab the rename sem here since it would |
552 | deadlock in the cases (beginning of sys_rename itself) | |
553 | in which we already have the sb rename sem */ | |
554 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 555 | if (full_path == NULL) { |
7ffec372 JL |
556 | rc = -ENOMEM; |
557 | goto lookup_out; | |
1da177e4 LT |
558 | } |
559 | ||
560 | if (direntry->d_inode != NULL) { | |
b6b38f70 | 561 | cFYI(1, "non-NULL inode in lookup"); |
1da177e4 | 562 | } else { |
b6b38f70 | 563 | cFYI(1, "NULL inode in lookup"); |
1da177e4 | 564 | } |
b6b38f70 | 565 | cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); |
1da177e4 | 566 | |
8db14ca1 SF |
567 | /* Posix open is only called (at lookup time) for file create now. |
568 | * For opens (rather than creates), because we do not know if it | |
569 | * is a file or directory yet, and current Samba no longer allows | |
570 | * us to do posix open on dirs, we could end up wasting an open call | |
571 | * on what turns out to be a dir. For file opens, we wait to call posix | |
572 | * open till cifs_open. It could be added here (lookup) in the future | |
573 | * but the performance tradeoff of the extra network request when EISDIR | |
574 | * or EACCES is returned would have to be weighed against the 50% | |
575 | * reduction in network traffic in the other paths. | |
576 | */ | |
a6ce4932 | 577 | if (pTcon->unix_ext) { |
8e6c0332 | 578 | if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) && |
8db14ca1 | 579 | (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && |
608712fe | 580 | (nd->intent.open.file->f_flags & O_CREAT)) { |
2422f676 | 581 | rc = cifs_posix_open(full_path, &newInode, |
fa588e0c | 582 | parent_dir_inode->i_sb, |
703a3b8e | 583 | nd->intent.open.create_mode, |
608712fe | 584 | nd->intent.open.file->f_flags, &oplock, |
a6ce4932 | 585 | &fileHandle, xid); |
8db14ca1 SF |
586 | /* |
587 | * The check below works around a bug in POSIX | |
588 | * open in samba versions 3.3.1 and earlier where | |
589 | * open could incorrectly fail with invalid parameter. | |
590 | * If either that or op not supported returned, follow | |
591 | * the normal lookup. | |
592 | */ | |
593 | if ((rc == 0) || (rc == -ENOENT)) | |
594 | posix_open = true; | |
595 | else if ((rc == -EINVAL) || (rc != -EOPNOTSUPP)) | |
596 | pTcon->broken_posix_open = true; | |
a6ce4932 SF |
597 | } |
598 | if (!posix_open) | |
599 | rc = cifs_get_inode_info_unix(&newInode, full_path, | |
600 | parent_dir_inode->i_sb, xid); | |
601 | } else | |
1da177e4 | 602 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 603 | parent_dir_inode->i_sb, xid, NULL); |
1da177e4 LT |
604 | |
605 | if ((rc == 0) && (newInode != NULL)) { | |
b92327fe | 606 | if (pTcon->nocase) |
fb045adb | 607 | d_set_d_op(direntry, &cifs_ci_dentry_ops); |
b92327fe | 608 | else |
fb045adb | 609 | d_set_d_op(direntry, &cifs_dentry_ops); |
1da177e4 | 610 | d_add(direntry, newInode); |
2422f676 | 611 | if (posix_open) { |
6ca9f3ba JL |
612 | filp = lookup_instantiate_filp(nd, direntry, |
613 | generic_file_open); | |
614 | if (IS_ERR(filp)) { | |
615 | rc = PTR_ERR(filp); | |
616 | CIFSSMBClose(xid, pTcon, fileHandle); | |
617 | goto lookup_out; | |
618 | } | |
619 | ||
abfe1eed JL |
620 | cfile = cifs_new_fileinfo(fileHandle, filp, tlink, |
621 | oplock); | |
2422f676 | 622 | if (cfile == NULL) { |
6ca9f3ba | 623 | fput(filp); |
2422f676 JL |
624 | CIFSSMBClose(xid, pTcon, fileHandle); |
625 | rc = -ENOMEM; | |
626 | goto lookup_out; | |
627 | } | |
2422f676 | 628 | } |
5fdae1f6 | 629 | /* since paths are not looked up by component - the parent |
3abb9272 | 630 | directories are presumed to be good here */ |
1da177e4 LT |
631 | renew_parental_timestamps(direntry); |
632 | ||
633 | } else if (rc == -ENOENT) { | |
634 | rc = 0; | |
3abb9272 SF |
635 | direntry->d_time = jiffies; |
636 | if (pTcon->nocase) | |
fb045adb | 637 | d_set_d_op(direntry, &cifs_ci_dentry_ops); |
3abb9272 | 638 | else |
fb045adb | 639 | d_set_d_op(direntry, &cifs_dentry_ops); |
1da177e4 | 640 | d_add(direntry, NULL); |
5fdae1f6 SF |
641 | /* if it was once a directory (but how can we tell?) we could do |
642 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 643 | } else if (rc != -EACCES) { |
b6b38f70 | 644 | cERROR(1, "Unexpected lookup error %d", rc); |
ed2b9170 SF |
645 | /* We special case check for Access Denied - since that |
646 | is a common return code */ | |
1da177e4 LT |
647 | } |
648 | ||
2422f676 | 649 | lookup_out: |
d14537f1 | 650 | kfree(full_path); |
7ffec372 | 651 | cifs_put_tlink(tlink); |
1da177e4 LT |
652 | FreeXid(xid); |
653 | return ERR_PTR(rc); | |
654 | } | |
655 | ||
1da177e4 LT |
656 | static int |
657 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
658 | { | |
1da177e4 | 659 | if (direntry->d_inode) { |
df2cf170 | 660 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 661 | return 0; |
79eb4dde NP |
662 | else |
663 | return 1; | |
1da177e4 LT |
664 | } |
665 | ||
79eb4dde NP |
666 | /* |
667 | * This may be nfsd (or something), anyway, we can't see the | |
668 | * intent of this. So, since this can be for creation, drop it. | |
669 | */ | |
670 | if (!nd) | |
671 | return 0; | |
672 | ||
673 | /* | |
674 | * Drop the negative dentry, in order to make sure to use the | |
675 | * case sensitive name which is specified by user if this is | |
676 | * for creation. | |
677 | */ | |
678 | if (!(nd->flags & (LOOKUP_CONTINUE | LOOKUP_PARENT))) { | |
679 | if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) | |
680 | return 0; | |
681 | } | |
682 | ||
683 | if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) | |
684 | return 0; | |
685 | ||
686 | return 1; | |
1da177e4 LT |
687 | } |
688 | ||
689 | /* static int cifs_d_delete(struct dentry *direntry) | |
690 | { | |
691 | int rc = 0; | |
692 | ||
b6b38f70 | 693 | cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
1da177e4 LT |
694 | |
695 | return rc; | |
696 | } */ | |
697 | ||
4fd03e84 | 698 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 699 | .d_revalidate = cifs_d_revalidate, |
5fdae1f6 | 700 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 701 | }; |
b92327fe | 702 | |
b1e6a015 NP |
703 | static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, |
704 | struct qstr *q) | |
b92327fe | 705 | { |
b1e6a015 | 706 | struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; |
b92327fe SF |
707 | unsigned long hash; |
708 | int i; | |
709 | ||
710 | hash = init_name_hash(); | |
711 | for (i = 0; i < q->len; i++) | |
712 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
713 | hash); | |
714 | q->hash = end_name_hash(hash); | |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
621e155a NP |
719 | static int cifs_ci_compare(const struct dentry *parent, |
720 | const struct inode *pinode, | |
721 | const struct dentry *dentry, const struct inode *inode, | |
722 | unsigned int len, const char *str, const struct qstr *name) | |
b92327fe | 723 | { |
621e155a | 724 | struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; |
b92327fe | 725 | |
621e155a NP |
726 | if ((name->len == len) && |
727 | (nls_strnicmp(codepage, name->name, str, len) == 0)) | |
b92327fe | 728 | return 0; |
b92327fe SF |
729 | return 1; |
730 | } | |
731 | ||
4fd03e84 | 732 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
733 | .d_revalidate = cifs_d_revalidate, |
734 | .d_hash = cifs_ci_hash, | |
735 | .d_compare = cifs_ci_compare, | |
736 | }; |