]>
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 | 52 | int namelen; |
646dd539 | 53 | int dfsplen; |
1da177e4 | 54 | char *full_path; |
88274815 | 55 | char dirsep; |
0d424ad0 | 56 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 57 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
dc137bf5 | 58 | unsigned seq; |
1da177e4 | 59 | |
646dd539 | 60 | dirsep = CIFS_DIR_SEP(cifs_sb); |
0d424ad0 JL |
61 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
62 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
646dd539 SF |
63 | else |
64 | dfsplen = 0; | |
1da177e4 | 65 | cifs_bp_rename_retry: |
f87d39d9 | 66 | namelen = dfsplen; |
dc137bf5 AV |
67 | seq = read_seqbegin(&rename_lock); |
68 | rcu_read_lock(); | |
1da177e4 LT |
69 | for (temp = direntry; !IS_ROOT(temp);) { |
70 | namelen += (1 + temp->d_name.len); | |
71 | temp = temp->d_parent; | |
5fdae1f6 | 72 | if (temp == NULL) { |
b6b38f70 | 73 | cERROR(1, "corrupt dentry"); |
dc137bf5 | 74 | rcu_read_unlock(); |
1da177e4 LT |
75 | return NULL; |
76 | } | |
77 | } | |
dc137bf5 | 78 | rcu_read_unlock(); |
1da177e4 LT |
79 | |
80 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 81 | if (full_path == NULL) |
1da177e4 LT |
82 | return full_path; |
83 | full_path[namelen] = 0; /* trailing null */ | |
dc137bf5 | 84 | rcu_read_lock(); |
1da177e4 | 85 | for (temp = direntry; !IS_ROOT(temp);) { |
dc137bf5 | 86 | spin_lock(&temp->d_lock); |
1da177e4 LT |
87 | namelen -= 1 + temp->d_name.len; |
88 | if (namelen < 0) { | |
dc137bf5 | 89 | spin_unlock(&temp->d_lock); |
1da177e4 LT |
90 | break; |
91 | } else { | |
7f57356b | 92 | full_path[namelen] = dirsep; |
1da177e4 LT |
93 | strncpy(full_path + namelen + 1, temp->d_name.name, |
94 | temp->d_name.len); | |
b6b38f70 | 95 | cFYI(0, "name: %s", full_path + namelen); |
1da177e4 | 96 | } |
dc137bf5 | 97 | spin_unlock(&temp->d_lock); |
1da177e4 | 98 | temp = temp->d_parent; |
5fdae1f6 | 99 | if (temp == NULL) { |
b6b38f70 | 100 | cERROR(1, "corrupt dentry"); |
dc137bf5 | 101 | rcu_read_unlock(); |
1da177e4 LT |
102 | kfree(full_path); |
103 | return NULL; | |
104 | } | |
105 | } | |
dc137bf5 AV |
106 | rcu_read_unlock(); |
107 | if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) { | |
fa71f447 JL |
108 | cFYI(1, "did not end path lookup where expected. namelen=%d " |
109 | "dfsplen=%d", namelen, dfsplen); | |
5fdae1f6 | 110 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
111 | of one of the parent directories (we can not lock the dentries |
112 | above us to prevent this, but retrying should be harmless) */ | |
113 | kfree(full_path); | |
1da177e4 LT |
114 | goto cifs_bp_rename_retry; |
115 | } | |
2fe87f02 SF |
116 | /* DIR_SEP already set for byte 0 / vs \ but not for |
117 | subsequent slashes in prepath which currently must | |
118 | be entered the right way - not sure if there is an alternative | |
119 | since the '\' is a valid posix character so we can not switch | |
120 | those safely to '/' if any are found in the middle of the prepath */ | |
121 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
646dd539 SF |
122 | |
123 | if (dfsplen) { | |
0d424ad0 | 124 | strncpy(full_path, tcon->treeName, dfsplen); |
646dd539 SF |
125 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
126 | int i; | |
127 | for (i = 0; i < dfsplen; i++) { | |
128 | if (full_path[i] == '\\') | |
129 | full_path[i] = '/'; | |
130 | } | |
131 | } | |
132 | } | |
1da177e4 LT |
133 | return full_path; |
134 | } | |
135 | ||
3979877e | 136 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 LT |
137 | |
138 | int | |
139 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
140 | struct nameidata *nd) | |
141 | { | |
142 | int rc = -ENOENT; | |
143 | int xid; | |
67750fb9 | 144 | int create_options = CREATE_NOT_DIR; |
590a3fe0 | 145 | __u32 oplock = 0; |
c3b2a0c6 SF |
146 | int oflags; |
147 | /* | |
148 | * BB below access is probably too much for mknod to request | |
149 | * but we have to do query and setpathinfo so requesting | |
150 | * less could fail (unless we want to request getatr and setatr | |
151 | * permissions (only). At least for POSIX we do not have to | |
152 | * request so much. | |
153 | */ | |
1da177e4 LT |
154 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; |
155 | __u16 fileHandle; | |
156 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 157 | struct tcon_link *tlink; |
96daf2b0 | 158 | struct cifs_tcon *tcon; |
1da177e4 | 159 | char *full_path = NULL; |
fb8c4b14 | 160 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 161 | struct inode *newinode = NULL; |
1da177e4 | 162 | int disposition = FILE_OVERWRITE_IF; |
1da177e4 LT |
163 | |
164 | xid = GetXid(); | |
165 | ||
166 | cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 JL |
167 | tlink = cifs_sb_tlink(cifs_sb); |
168 | if (IS_ERR(tlink)) { | |
169 | FreeXid(xid); | |
170 | return PTR_ERR(tlink); | |
1da177e4 | 171 | } |
7ffec372 | 172 | tcon = tlink_tcon(tlink); |
1da177e4 | 173 | |
c3b2a0c6 SF |
174 | if (oplockEnabled) |
175 | oplock = REQ_OPLOCK; | |
f818dd55 | 176 | |
dd7dd556 | 177 | if (nd) |
608712fe | 178 | oflags = nd->intent.open.file->f_flags; |
c3b2a0c6 | 179 | else |
608712fe | 180 | oflags = O_RDONLY | O_CREAT; |
c3b2a0c6 | 181 | |
7ffec372 JL |
182 | full_path = build_path_from_dentry(direntry); |
183 | if (full_path == NULL) { | |
184 | rc = -ENOMEM; | |
185 | goto cifs_create_out; | |
186 | } | |
187 | ||
c3b2a0c6 SF |
188 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && |
189 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
190 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
fa588e0c | 191 | rc = cifs_posix_open(full_path, &newinode, |
fa588e0c | 192 | inode->i_sb, mode, oflags, &oplock, &fileHandle, xid); |
c3b2a0c6 SF |
193 | /* EIO could indicate that (posix open) operation is not |
194 | supported, despite what server claimed in capability | |
25985edc | 195 | negotiation. EREMOTE indicates DFS junction, which is not |
c3b2a0c6 SF |
196 | handled in posix open */ |
197 | ||
90e4ee5d | 198 | if (rc == 0) { |
90e4ee5d SF |
199 | if (newinode == NULL) /* query inode info */ |
200 | goto cifs_create_get_file_info; | |
201 | else /* success, no need to query */ | |
202 | goto cifs_create_set_dentry; | |
203 | } else if ((rc != -EIO) && (rc != -EREMOTE) && | |
703a3b8e | 204 | (rc != -EOPNOTSUPP) && (rc != -EINVAL)) |
c3b2a0c6 SF |
205 | goto cifs_create_out; |
206 | /* else fallthrough to retry, using older open call, this is | |
207 | case where server does not support this SMB level, and | |
208 | falsely claims capability (also get here for DFS case | |
209 | which should be rare for path not covered on files) */ | |
210 | } | |
e08fc045 | 211 | |
dd7dd556 | 212 | if (nd) { |
c3b2a0c6 SF |
213 | /* if the file is going to stay open, then we |
214 | need to set the desired access properly */ | |
e08fc045 | 215 | desiredAccess = 0; |
608712fe | 216 | if (OPEN_FMODE(oflags) & FMODE_READ) |
c3b2a0c6 | 217 | desiredAccess |= GENERIC_READ; /* is this too little? */ |
608712fe | 218 | if (OPEN_FMODE(oflags) & FMODE_WRITE) |
e08fc045 | 219 | desiredAccess |= GENERIC_WRITE; |
1da177e4 | 220 | |
5fdae1f6 | 221 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 222 | disposition = FILE_CREATE; |
5fdae1f6 | 223 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 224 | disposition = FILE_OVERWRITE_IF; |
5fdae1f6 | 225 | else if ((oflags & O_CREAT) == O_CREAT) |
1da177e4 | 226 | disposition = FILE_OPEN_IF; |
ad7a2926 | 227 | else |
b6b38f70 | 228 | cFYI(1, "Create flag not set in create function"); |
1da177e4 LT |
229 | } |
230 | ||
5fdae1f6 SF |
231 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
232 | ACLs */ | |
1da177e4 | 233 | |
5fdae1f6 SF |
234 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
235 | if (buf == NULL) { | |
232341ba JL |
236 | rc = -ENOMEM; |
237 | goto cifs_create_out; | |
1da177e4 | 238 | } |
67750fb9 | 239 | |
67750fb9 JL |
240 | /* |
241 | * if we're not using unix extensions, see if we need to set | |
242 | * ATTR_READONLY on the create call | |
243 | */ | |
f818dd55 | 244 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
245 | create_options |= CREATE_OPTION_READONLY; |
246 | ||
a6e8a845 | 247 | if (tcon->ses->capabilities & CAP_NT_SMBS) |
f818dd55 | 248 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
67750fb9 | 249 | desiredAccess, create_options, |
737b758c SF |
250 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
251 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5bafd765 SF |
252 | else |
253 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
254 | ||
5fdae1f6 | 255 | if (rc == -EIO) { |
a9d02ad4 | 256 | /* old server, retry the open legacy style */ |
f818dd55 | 257 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
67750fb9 | 258 | desiredAccess, create_options, |
a9d02ad4 SF |
259 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
260 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5fdae1f6 | 261 | } |
1da177e4 | 262 | if (rc) { |
b6b38f70 | 263 | cFYI(1, "cifs_create returned 0x%x", rc); |
c3b2a0c6 SF |
264 | goto cifs_create_out; |
265 | } | |
266 | ||
267 | /* If Open reported that we actually created a file | |
268 | then we now have to set the mode if possible */ | |
269 | if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { | |
270 | struct cifs_unix_set_info_args args = { | |
4e1e7fb9 JL |
271 | .mode = mode, |
272 | .ctime = NO_CHANGE_64, | |
273 | .atime = NO_CHANGE_64, | |
274 | .mtime = NO_CHANGE_64, | |
275 | .device = 0, | |
c3b2a0c6 SF |
276 | }; |
277 | ||
278 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
279 | args.uid = (__u64) current_fsuid(); | |
280 | if (inode->i_mode & S_ISGID) | |
281 | args.gid = (__u64) inode->i_gid; | |
282 | else | |
283 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 284 | } else { |
c3b2a0c6 SF |
285 | args.uid = NO_CHANGE_64; |
286 | args.gid = NO_CHANGE_64; | |
1da177e4 | 287 | } |
d44a9fe2 JL |
288 | CIFSSMBUnixSetFileInfo(xid, tcon, &args, fileHandle, |
289 | current->tgid); | |
c3b2a0c6 SF |
290 | } else { |
291 | /* BB implement mode setting via Windows security | |
292 | descriptors e.g. */ | |
293 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ | |
294 | ||
295 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
296 | } | |
1da177e4 | 297 | |
c3b2a0c6 SF |
298 | cifs_create_get_file_info: |
299 | /* server might mask mode so we have to query for it */ | |
300 | if (tcon->unix_ext) | |
301 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
302 | inode->i_sb, xid); | |
303 | else { | |
304 | rc = cifs_get_inode_info(&newinode, full_path, buf, | |
305 | inode->i_sb, xid, &fileHandle); | |
306 | if (newinode) { | |
307 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
308 | newinode->i_mode = mode; | |
309 | if ((oplock & CIFS_CREATE_ACTION) && | |
310 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { | |
311 | newinode->i_uid = current_fsuid(); | |
312 | if (inode->i_mode & S_ISGID) | |
313 | newinode->i_gid = inode->i_gid; | |
314 | else | |
315 | newinode->i_gid = current_fsgid(); | |
6473a559 | 316 | } |
1da177e4 | 317 | } |
c3b2a0c6 | 318 | } |
1da177e4 | 319 | |
c3b2a0c6 SF |
320 | cifs_create_set_dentry: |
321 | if (rc == 0) | |
1c929cfe | 322 | d_instantiate(direntry, newinode); |
c3b2a0c6 | 323 | else |
b6b38f70 | 324 | cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
c3b2a0c6 | 325 | |
dd7dd556 | 326 | if (newinode && nd) { |
fdb36038 | 327 | struct cifsFileInfo *pfile_info; |
6ca9f3ba JL |
328 | struct file *filp; |
329 | ||
330 | filp = lookup_instantiate_filp(nd, direntry, generic_file_open); | |
331 | if (IS_ERR(filp)) { | |
332 | rc = PTR_ERR(filp); | |
333 | CIFSSMBClose(xid, tcon, fileHandle); | |
334 | goto cifs_create_out; | |
335 | } | |
336 | ||
abfe1eed | 337 | pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock); |
6ca9f3ba JL |
338 | if (pfile_info == NULL) { |
339 | fput(filp); | |
340 | CIFSSMBClose(xid, tcon, fileHandle); | |
fdb36038 | 341 | rc = -ENOMEM; |
6ca9f3ba | 342 | } |
2422f676 JL |
343 | } else { |
344 | CIFSSMBClose(xid, tcon, fileHandle); | |
5fdae1f6 | 345 | } |
2422f676 | 346 | |
d14537f1 SF |
347 | cifs_create_out: |
348 | kfree(buf); | |
349 | kfree(full_path); | |
7ffec372 | 350 | cifs_put_tlink(tlink); |
1da177e4 | 351 | FreeXid(xid); |
1da177e4 LT |
352 | return rc; |
353 | } | |
354 | ||
5fdae1f6 SF |
355 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
356 | dev_t device_number) | |
1da177e4 LT |
357 | { |
358 | int rc = -EPERM; | |
359 | int xid; | |
360 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 361 | struct tcon_link *tlink; |
96daf2b0 | 362 | struct cifs_tcon *pTcon; |
fa2989f4 | 363 | struct cifs_io_parms io_parms; |
1da177e4 | 364 | char *full_path = NULL; |
fb8c4b14 | 365 | struct inode *newinode = NULL; |
5d9ac7fd JL |
366 | int oplock = 0; |
367 | u16 fileHandle; | |
368 | FILE_ALL_INFO *buf = NULL; | |
369 | unsigned int bytes_written; | |
370 | struct win_dev *pdev; | |
1da177e4 LT |
371 | |
372 | if (!old_valid_dev(device_number)) | |
373 | return -EINVAL; | |
374 | ||
1da177e4 | 375 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
376 | tlink = cifs_sb_tlink(cifs_sb); |
377 | if (IS_ERR(tlink)) | |
378 | return PTR_ERR(tlink); | |
379 | ||
380 | pTcon = tlink_tcon(tlink); | |
381 | ||
382 | xid = GetXid(); | |
1da177e4 | 383 | |
1da177e4 | 384 | full_path = build_path_from_dentry(direntry); |
5d9ac7fd | 385 | if (full_path == NULL) { |
1da177e4 | 386 | rc = -ENOMEM; |
5d9ac7fd JL |
387 | goto mknod_out; |
388 | } | |
389 | ||
390 | if (pTcon->unix_ext) { | |
4e1e7fb9 | 391 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 392 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
393 | .ctime = NO_CHANGE_64, |
394 | .atime = NO_CHANGE_64, | |
395 | .mtime = NO_CHANGE_64, | |
396 | .device = device_number, | |
397 | }; | |
5fdae1f6 | 398 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
399 | args.uid = (__u64) current_fsuid(); |
400 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 401 | } else { |
4e1e7fb9 JL |
402 | args.uid = NO_CHANGE_64; |
403 | args.gid = NO_CHANGE_64; | |
1da177e4 | 404 | } |
01ea95e3 JL |
405 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
406 | cifs_sb->local_nls, | |
407 | cifs_sb->mnt_cifs_flags & | |
408 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5d9ac7fd JL |
409 | if (rc) |
410 | goto mknod_out; | |
1da177e4 | 411 | |
5d9ac7fd | 412 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 413 | inode->i_sb, xid); |
eda3c029 | 414 | |
5d9ac7fd JL |
415 | if (rc == 0) |
416 | d_instantiate(direntry, newinode); | |
417 | goto mknod_out; | |
1da177e4 LT |
418 | } |
419 | ||
5d9ac7fd JL |
420 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) |
421 | goto mknod_out; | |
422 | ||
423 | ||
424 | cFYI(1, "sfu compat create special file"); | |
425 | ||
426 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
427 | if (buf == NULL) { | |
428 | kfree(full_path); | |
429 | rc = -ENOMEM; | |
430 | FreeXid(xid); | |
431 | return rc; | |
432 | } | |
433 | ||
434 | /* FIXME: would WRITE_OWNER | WRITE_DAC be better? */ | |
435 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, | |
436 | GENERIC_WRITE, CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
437 | &fileHandle, &oplock, buf, cifs_sb->local_nls, | |
438 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
439 | if (rc) | |
440 | goto mknod_out; | |
441 | ||
442 | /* BB Do not bother to decode buf since no local inode yet to put | |
443 | * timestamps in, but we can reuse it safely */ | |
444 | ||
445 | pdev = (struct win_dev *)buf; | |
fa2989f4 PS |
446 | io_parms.netfid = fileHandle; |
447 | io_parms.pid = current->tgid; | |
448 | io_parms.tcon = pTcon; | |
449 | io_parms.offset = 0; | |
450 | io_parms.length = sizeof(struct win_dev); | |
5d9ac7fd JL |
451 | if (S_ISCHR(mode)) { |
452 | memcpy(pdev->type, "IntxCHR", 8); | |
453 | pdev->major = | |
454 | cpu_to_le64(MAJOR(device_number)); | |
455 | pdev->minor = | |
456 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
457 | rc = CIFSSMBWrite(xid, &io_parms, |
458 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
459 | NULL, 0); |
460 | } else if (S_ISBLK(mode)) { | |
461 | memcpy(pdev->type, "IntxBLK", 8); | |
462 | pdev->major = | |
463 | cpu_to_le64(MAJOR(device_number)); | |
464 | pdev->minor = | |
465 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
466 | rc = CIFSSMBWrite(xid, &io_parms, |
467 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
468 | NULL, 0); |
469 | } /* else if (S_ISFIFO) */ | |
470 | CIFSSMBClose(xid, pTcon, fileHandle); | |
471 | d_drop(direntry); | |
472 | ||
473 | /* FIXME: add code here to set EAs */ | |
474 | ||
475 | mknod_out: | |
d14537f1 | 476 | kfree(full_path); |
5d9ac7fd | 477 | kfree(buf); |
1da177e4 | 478 | FreeXid(xid); |
7ffec372 | 479 | cifs_put_tlink(tlink); |
1da177e4 LT |
480 | return rc; |
481 | } | |
482 | ||
1da177e4 | 483 | struct dentry * |
5fdae1f6 SF |
484 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
485 | struct nameidata *nd) | |
1da177e4 LT |
486 | { |
487 | int xid; | |
488 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
590a3fe0 | 489 | __u32 oplock = 0; |
a6ce4932 SF |
490 | __u16 fileHandle = 0; |
491 | bool posix_open = false; | |
1da177e4 | 492 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 493 | struct tcon_link *tlink; |
96daf2b0 | 494 | struct cifs_tcon *pTcon; |
2422f676 | 495 | struct cifsFileInfo *cfile; |
1da177e4 LT |
496 | struct inode *newInode = NULL; |
497 | char *full_path = NULL; | |
a6ce4932 | 498 | struct file *filp; |
1da177e4 LT |
499 | |
500 | xid = GetXid(); | |
501 | ||
b6b38f70 JP |
502 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", |
503 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 504 | |
1da177e4 LT |
505 | /* check whether path exists */ |
506 | ||
507 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
7ffec372 JL |
508 | tlink = cifs_sb_tlink(cifs_sb); |
509 | if (IS_ERR(tlink)) { | |
510 | FreeXid(xid); | |
511 | return (struct dentry *)tlink; | |
512 | } | |
513 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 514 | |
296034f7 SF |
515 | /* |
516 | * Don't allow the separator character in a path component. | |
517 | * The VFS will not allow "/", but "\" is allowed by posix. | |
518 | */ | |
519 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
520 | int i; | |
521 | for (i = 0; i < direntry->d_name.len; i++) | |
522 | if (direntry->d_name.name[i] == '\\') { | |
b6b38f70 | 523 | cFYI(1, "Invalid file name"); |
7ffec372 JL |
524 | rc = -EINVAL; |
525 | goto lookup_out; | |
296034f7 SF |
526 | } |
527 | } | |
528 | ||
5ddf1e0f JL |
529 | /* |
530 | * O_EXCL: optimize away the lookup, but don't hash the dentry. Let | |
531 | * the VFS handle the create. | |
532 | */ | |
8e6c0332 | 533 | if (nd && (nd->flags & LOOKUP_EXCL)) { |
5ddf1e0f | 534 | d_instantiate(direntry, NULL); |
7ffec372 JL |
535 | rc = 0; |
536 | goto lookup_out; | |
5ddf1e0f JL |
537 | } |
538 | ||
1da177e4 LT |
539 | /* can not grab the rename sem here since it would |
540 | deadlock in the cases (beginning of sys_rename itself) | |
541 | in which we already have the sb rename sem */ | |
542 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 543 | if (full_path == NULL) { |
7ffec372 JL |
544 | rc = -ENOMEM; |
545 | goto lookup_out; | |
1da177e4 LT |
546 | } |
547 | ||
548 | if (direntry->d_inode != NULL) { | |
b6b38f70 | 549 | cFYI(1, "non-NULL inode in lookup"); |
1da177e4 | 550 | } else { |
b6b38f70 | 551 | cFYI(1, "NULL inode in lookup"); |
1da177e4 | 552 | } |
b6b38f70 | 553 | cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); |
1da177e4 | 554 | |
8db14ca1 SF |
555 | /* Posix open is only called (at lookup time) for file create now. |
556 | * For opens (rather than creates), because we do not know if it | |
557 | * is a file or directory yet, and current Samba no longer allows | |
558 | * us to do posix open on dirs, we could end up wasting an open call | |
559 | * on what turns out to be a dir. For file opens, we wait to call posix | |
560 | * open till cifs_open. It could be added here (lookup) in the future | |
561 | * but the performance tradeoff of the extra network request when EISDIR | |
562 | * or EACCES is returned would have to be weighed against the 50% | |
563 | * reduction in network traffic in the other paths. | |
564 | */ | |
a6ce4932 | 565 | if (pTcon->unix_ext) { |
43527803 | 566 | if (nd && !(nd->flags & LOOKUP_DIRECTORY) && |
8db14ca1 | 567 | (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && |
608712fe | 568 | (nd->intent.open.file->f_flags & O_CREAT)) { |
2422f676 | 569 | rc = cifs_posix_open(full_path, &newInode, |
fa588e0c | 570 | parent_dir_inode->i_sb, |
703a3b8e | 571 | nd->intent.open.create_mode, |
608712fe | 572 | nd->intent.open.file->f_flags, &oplock, |
a6ce4932 | 573 | &fileHandle, xid); |
8db14ca1 SF |
574 | /* |
575 | * The check below works around a bug in POSIX | |
576 | * open in samba versions 3.3.1 and earlier where | |
577 | * open could incorrectly fail with invalid parameter. | |
578 | * If either that or op not supported returned, follow | |
579 | * the normal lookup. | |
580 | */ | |
581 | if ((rc == 0) || (rc == -ENOENT)) | |
582 | posix_open = true; | |
583 | else if ((rc == -EINVAL) || (rc != -EOPNOTSUPP)) | |
584 | pTcon->broken_posix_open = true; | |
a6ce4932 SF |
585 | } |
586 | if (!posix_open) | |
587 | rc = cifs_get_inode_info_unix(&newInode, full_path, | |
588 | parent_dir_inode->i_sb, xid); | |
589 | } else | |
1da177e4 | 590 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 591 | parent_dir_inode->i_sb, xid, NULL); |
1da177e4 LT |
592 | |
593 | if ((rc == 0) && (newInode != NULL)) { | |
1da177e4 | 594 | d_add(direntry, newInode); |
2422f676 | 595 | if (posix_open) { |
6ca9f3ba JL |
596 | filp = lookup_instantiate_filp(nd, direntry, |
597 | generic_file_open); | |
598 | if (IS_ERR(filp)) { | |
599 | rc = PTR_ERR(filp); | |
600 | CIFSSMBClose(xid, pTcon, fileHandle); | |
601 | goto lookup_out; | |
602 | } | |
603 | ||
abfe1eed JL |
604 | cfile = cifs_new_fileinfo(fileHandle, filp, tlink, |
605 | oplock); | |
2422f676 | 606 | if (cfile == NULL) { |
6ca9f3ba | 607 | fput(filp); |
2422f676 JL |
608 | CIFSSMBClose(xid, pTcon, fileHandle); |
609 | rc = -ENOMEM; | |
610 | goto lookup_out; | |
611 | } | |
2422f676 | 612 | } |
5fdae1f6 | 613 | /* since paths are not looked up by component - the parent |
3abb9272 | 614 | directories are presumed to be good here */ |
1da177e4 LT |
615 | renew_parental_timestamps(direntry); |
616 | ||
617 | } else if (rc == -ENOENT) { | |
618 | rc = 0; | |
3abb9272 | 619 | direntry->d_time = jiffies; |
1da177e4 | 620 | d_add(direntry, NULL); |
5fdae1f6 SF |
621 | /* if it was once a directory (but how can we tell?) we could do |
622 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 623 | } else if (rc != -EACCES) { |
b6b38f70 | 624 | cERROR(1, "Unexpected lookup error %d", rc); |
ed2b9170 SF |
625 | /* We special case check for Access Denied - since that |
626 | is a common return code */ | |
1da177e4 LT |
627 | } |
628 | ||
2422f676 | 629 | lookup_out: |
d14537f1 | 630 | kfree(full_path); |
7ffec372 | 631 | cifs_put_tlink(tlink); |
1da177e4 LT |
632 | FreeXid(xid); |
633 | return ERR_PTR(rc); | |
634 | } | |
635 | ||
1da177e4 LT |
636 | static int |
637 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
638 | { | |
3ca30d40 | 639 | if (nd && (nd->flags & LOOKUP_RCU)) |
34286d66 NP |
640 | return -ECHILD; |
641 | ||
1da177e4 | 642 | if (direntry->d_inode) { |
df2cf170 | 643 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 644 | return 0; |
262f86ad NP |
645 | else |
646 | return 1; | |
1da177e4 LT |
647 | } |
648 | ||
262f86ad NP |
649 | /* |
650 | * This may be nfsd (or something), anyway, we can't see the | |
651 | * intent of this. So, since this can be for creation, drop it. | |
652 | */ | |
653 | if (!nd) | |
654 | return 0; | |
655 | ||
656 | /* | |
657 | * Drop the negative dentry, in order to make sure to use the | |
658 | * case sensitive name which is specified by user if this is | |
659 | * for creation. | |
660 | */ | |
407938e7 AV |
661 | if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) |
662 | return 0; | |
262f86ad NP |
663 | |
664 | if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) | |
665 | return 0; | |
666 | ||
667 | return 1; | |
1da177e4 LT |
668 | } |
669 | ||
670 | /* static int cifs_d_delete(struct dentry *direntry) | |
671 | { | |
672 | int rc = 0; | |
673 | ||
b6b38f70 | 674 | cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
1da177e4 LT |
675 | |
676 | return rc; | |
677 | } */ | |
678 | ||
4fd03e84 | 679 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 680 | .d_revalidate = cifs_d_revalidate, |
01c64fea | 681 | .d_automount = cifs_dfs_d_automount, |
5fdae1f6 | 682 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 683 | }; |
b92327fe | 684 | |
b1e6a015 NP |
685 | static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, |
686 | struct qstr *q) | |
b92327fe | 687 | { |
b1e6a015 | 688 | struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; |
b92327fe SF |
689 | unsigned long hash; |
690 | int i; | |
691 | ||
692 | hash = init_name_hash(); | |
693 | for (i = 0; i < q->len; i++) | |
694 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
695 | hash); | |
696 | q->hash = end_name_hash(hash); | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
621e155a NP |
701 | static int cifs_ci_compare(const struct dentry *parent, |
702 | const struct inode *pinode, | |
703 | const struct dentry *dentry, const struct inode *inode, | |
704 | unsigned int len, const char *str, const struct qstr *name) | |
b92327fe | 705 | { |
621e155a | 706 | struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; |
b92327fe | 707 | |
621e155a NP |
708 | if ((name->len == len) && |
709 | (nls_strnicmp(codepage, name->name, str, len) == 0)) | |
b92327fe | 710 | return 0; |
b92327fe SF |
711 | return 1; |
712 | } | |
713 | ||
4fd03e84 | 714 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
715 | .d_revalidate = cifs_d_revalidate, |
716 | .d_hash = cifs_ci_hash, | |
717 | .d_compare = cifs_ci_compare, | |
01c64fea | 718 | .d_automount = cifs_dfs_d_automount, |
b92327fe | 719 | }; |