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 | |
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 | 65 | dirsep = CIFS_DIR_SEP(cifs_sb); |
0d424ad0 JL |
66 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
67 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
646dd539 SF |
68 | else |
69 | dfsplen = 0; | |
1da177e4 | 70 | cifs_bp_rename_retry: |
f87d39d9 | 71 | namelen = dfsplen; |
dc137bf5 AV |
72 | seq = read_seqbegin(&rename_lock); |
73 | rcu_read_lock(); | |
1da177e4 LT |
74 | for (temp = direntry; !IS_ROOT(temp);) { |
75 | namelen += (1 + temp->d_name.len); | |
76 | temp = temp->d_parent; | |
5fdae1f6 | 77 | if (temp == NULL) { |
b6b38f70 | 78 | cERROR(1, "corrupt dentry"); |
dc137bf5 | 79 | rcu_read_unlock(); |
1da177e4 LT |
80 | return NULL; |
81 | } | |
82 | } | |
dc137bf5 | 83 | rcu_read_unlock(); |
1da177e4 LT |
84 | |
85 | full_path = kmalloc(namelen+1, GFP_KERNEL); | |
5fdae1f6 | 86 | if (full_path == NULL) |
1da177e4 LT |
87 | return full_path; |
88 | full_path[namelen] = 0; /* trailing null */ | |
dc137bf5 | 89 | rcu_read_lock(); |
1da177e4 | 90 | for (temp = direntry; !IS_ROOT(temp);) { |
dc137bf5 | 91 | spin_lock(&temp->d_lock); |
1da177e4 LT |
92 | namelen -= 1 + temp->d_name.len; |
93 | if (namelen < 0) { | |
dc137bf5 | 94 | spin_unlock(&temp->d_lock); |
1da177e4 LT |
95 | break; |
96 | } else { | |
7f57356b | 97 | full_path[namelen] = dirsep; |
1da177e4 LT |
98 | strncpy(full_path + namelen + 1, temp->d_name.name, |
99 | temp->d_name.len); | |
b6b38f70 | 100 | cFYI(0, "name: %s", full_path + namelen); |
1da177e4 | 101 | } |
dc137bf5 | 102 | spin_unlock(&temp->d_lock); |
1da177e4 | 103 | temp = temp->d_parent; |
5fdae1f6 | 104 | if (temp == NULL) { |
b6b38f70 | 105 | cERROR(1, "corrupt dentry"); |
dc137bf5 | 106 | rcu_read_unlock(); |
1da177e4 LT |
107 | kfree(full_path); |
108 | return NULL; | |
109 | } | |
110 | } | |
dc137bf5 AV |
111 | rcu_read_unlock(); |
112 | if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) { | |
b6b38f70 JP |
113 | cERROR(1, "did not end path lookup where expected namelen is %d", |
114 | namelen); | |
5fdae1f6 | 115 | /* presumably this is only possible if racing with a rename |
1da177e4 LT |
116 | of one of the parent directories (we can not lock the dentries |
117 | above us to prevent this, but retrying should be harmless) */ | |
118 | kfree(full_path); | |
1da177e4 LT |
119 | goto cifs_bp_rename_retry; |
120 | } | |
2fe87f02 SF |
121 | /* DIR_SEP already set for byte 0 / vs \ but not for |
122 | subsequent slashes in prepath which currently must | |
123 | be entered the right way - not sure if there is an alternative | |
124 | since the '\' is a valid posix character so we can not switch | |
125 | those safely to '/' if any are found in the middle of the prepath */ | |
126 | /* BB test paths to Windows with '/' in the midst of prepath */ | |
646dd539 SF |
127 | |
128 | if (dfsplen) { | |
0d424ad0 | 129 | strncpy(full_path, tcon->treeName, dfsplen); |
646dd539 SF |
130 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
131 | int i; | |
132 | for (i = 0; i < dfsplen; i++) { | |
133 | if (full_path[i] == '\\') | |
134 | full_path[i] = '/'; | |
135 | } | |
136 | } | |
137 | } | |
1da177e4 LT |
138 | return full_path; |
139 | } | |
140 | ||
3979877e | 141 | /* Inode operations in similar order to how they appear in Linux file fs.h */ |
1da177e4 LT |
142 | |
143 | int | |
144 | cifs_create(struct inode *inode, struct dentry *direntry, int mode, | |
145 | struct nameidata *nd) | |
146 | { | |
147 | int rc = -ENOENT; | |
148 | int xid; | |
67750fb9 | 149 | int create_options = CREATE_NOT_DIR; |
590a3fe0 | 150 | __u32 oplock = 0; |
c3b2a0c6 SF |
151 | int oflags; |
152 | /* | |
153 | * BB below access is probably too much for mknod to request | |
154 | * but we have to do query and setpathinfo so requesting | |
155 | * less could fail (unless we want to request getatr and setatr | |
156 | * permissions (only). At least for POSIX we do not have to | |
157 | * request so much. | |
158 | */ | |
1da177e4 LT |
159 | int desiredAccess = GENERIC_READ | GENERIC_WRITE; |
160 | __u16 fileHandle; | |
161 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 162 | struct tcon_link *tlink; |
96daf2b0 | 163 | struct cifs_tcon *tcon; |
1da177e4 | 164 | char *full_path = NULL; |
fb8c4b14 | 165 | FILE_ALL_INFO *buf = NULL; |
1da177e4 | 166 | struct inode *newinode = NULL; |
1da177e4 | 167 | int disposition = FILE_OVERWRITE_IF; |
1da177e4 LT |
168 | |
169 | xid = GetXid(); | |
170 | ||
171 | cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 JL |
172 | tlink = cifs_sb_tlink(cifs_sb); |
173 | if (IS_ERR(tlink)) { | |
174 | FreeXid(xid); | |
175 | return PTR_ERR(tlink); | |
1da177e4 | 176 | } |
7ffec372 | 177 | tcon = tlink_tcon(tlink); |
1da177e4 | 178 | |
c3b2a0c6 SF |
179 | if (oplockEnabled) |
180 | oplock = REQ_OPLOCK; | |
f818dd55 | 181 | |
dd7dd556 | 182 | if (nd) |
608712fe | 183 | oflags = nd->intent.open.file->f_flags; |
c3b2a0c6 | 184 | else |
608712fe | 185 | oflags = O_RDONLY | O_CREAT; |
c3b2a0c6 | 186 | |
7ffec372 JL |
187 | full_path = build_path_from_dentry(direntry); |
188 | if (full_path == NULL) { | |
189 | rc = -ENOMEM; | |
190 | goto cifs_create_out; | |
191 | } | |
192 | ||
c3b2a0c6 SF |
193 | if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && |
194 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
195 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
fa588e0c | 196 | rc = cifs_posix_open(full_path, &newinode, |
fa588e0c | 197 | inode->i_sb, mode, oflags, &oplock, &fileHandle, xid); |
c3b2a0c6 SF |
198 | /* EIO could indicate that (posix open) operation is not |
199 | supported, despite what server claimed in capability | |
25985edc | 200 | negotiation. EREMOTE indicates DFS junction, which is not |
c3b2a0c6 SF |
201 | handled in posix open */ |
202 | ||
90e4ee5d | 203 | if (rc == 0) { |
90e4ee5d SF |
204 | if (newinode == NULL) /* query inode info */ |
205 | goto cifs_create_get_file_info; | |
206 | else /* success, no need to query */ | |
207 | goto cifs_create_set_dentry; | |
208 | } else if ((rc != -EIO) && (rc != -EREMOTE) && | |
703a3b8e | 209 | (rc != -EOPNOTSUPP) && (rc != -EINVAL)) |
c3b2a0c6 SF |
210 | goto cifs_create_out; |
211 | /* else fallthrough to retry, using older open call, this is | |
212 | case where server does not support this SMB level, and | |
213 | falsely claims capability (also get here for DFS case | |
214 | which should be rare for path not covered on files) */ | |
215 | } | |
e08fc045 | 216 | |
dd7dd556 | 217 | if (nd) { |
c3b2a0c6 SF |
218 | /* if the file is going to stay open, then we |
219 | need to set the desired access properly */ | |
e08fc045 | 220 | desiredAccess = 0; |
608712fe | 221 | if (OPEN_FMODE(oflags) & FMODE_READ) |
c3b2a0c6 | 222 | desiredAccess |= GENERIC_READ; /* is this too little? */ |
608712fe | 223 | if (OPEN_FMODE(oflags) & FMODE_WRITE) |
e08fc045 | 224 | desiredAccess |= GENERIC_WRITE; |
1da177e4 | 225 | |
5fdae1f6 | 226 | if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
1da177e4 | 227 | disposition = FILE_CREATE; |
5fdae1f6 | 228 | else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
1da177e4 | 229 | disposition = FILE_OVERWRITE_IF; |
5fdae1f6 | 230 | else if ((oflags & O_CREAT) == O_CREAT) |
1da177e4 | 231 | disposition = FILE_OPEN_IF; |
ad7a2926 | 232 | else |
b6b38f70 | 233 | cFYI(1, "Create flag not set in create function"); |
1da177e4 LT |
234 | } |
235 | ||
5fdae1f6 SF |
236 | /* BB add processing to set equivalent of mode - e.g. via CreateX with |
237 | ACLs */ | |
1da177e4 | 238 | |
5fdae1f6 SF |
239 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
240 | if (buf == NULL) { | |
232341ba JL |
241 | rc = -ENOMEM; |
242 | goto cifs_create_out; | |
1da177e4 | 243 | } |
67750fb9 | 244 | |
67750fb9 JL |
245 | /* |
246 | * if we're not using unix extensions, see if we need to set | |
247 | * ATTR_READONLY on the create call | |
248 | */ | |
f818dd55 | 249 | if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
67750fb9 JL |
250 | create_options |= CREATE_OPTION_READONLY; |
251 | ||
a6e8a845 | 252 | if (tcon->ses->capabilities & CAP_NT_SMBS) |
f818dd55 | 253 | rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
67750fb9 | 254 | desiredAccess, create_options, |
737b758c SF |
255 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
256 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5bafd765 SF |
257 | else |
258 | rc = -EIO; /* no NT SMB support fall into legacy open below */ | |
259 | ||
5fdae1f6 | 260 | if (rc == -EIO) { |
a9d02ad4 | 261 | /* old server, retry the open legacy style */ |
f818dd55 | 262 | rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
67750fb9 | 263 | desiredAccess, create_options, |
a9d02ad4 SF |
264 | &fileHandle, &oplock, buf, cifs_sb->local_nls, |
265 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5fdae1f6 | 266 | } |
1da177e4 | 267 | if (rc) { |
b6b38f70 | 268 | cFYI(1, "cifs_create returned 0x%x", rc); |
c3b2a0c6 SF |
269 | goto cifs_create_out; |
270 | } | |
271 | ||
272 | /* If Open reported that we actually created a file | |
273 | then we now have to set the mode if possible */ | |
274 | if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) { | |
275 | struct cifs_unix_set_info_args args = { | |
4e1e7fb9 JL |
276 | .mode = mode, |
277 | .ctime = NO_CHANGE_64, | |
278 | .atime = NO_CHANGE_64, | |
279 | .mtime = NO_CHANGE_64, | |
280 | .device = 0, | |
c3b2a0c6 SF |
281 | }; |
282 | ||
283 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
284 | args.uid = (__u64) current_fsuid(); | |
285 | if (inode->i_mode & S_ISGID) | |
286 | args.gid = (__u64) inode->i_gid; | |
287 | else | |
288 | args.gid = (__u64) current_fsgid(); | |
3ce53fc4 | 289 | } else { |
c3b2a0c6 SF |
290 | args.uid = NO_CHANGE_64; |
291 | args.gid = NO_CHANGE_64; | |
1da177e4 | 292 | } |
d44a9fe2 JL |
293 | CIFSSMBUnixSetFileInfo(xid, tcon, &args, fileHandle, |
294 | current->tgid); | |
c3b2a0c6 SF |
295 | } else { |
296 | /* BB implement mode setting via Windows security | |
297 | descriptors e.g. */ | |
298 | /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ | |
299 | ||
300 | /* Could set r/o dos attribute if mode & 0222 == 0 */ | |
301 | } | |
1da177e4 | 302 | |
c3b2a0c6 SF |
303 | cifs_create_get_file_info: |
304 | /* server might mask mode so we have to query for it */ | |
305 | if (tcon->unix_ext) | |
306 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
307 | inode->i_sb, xid); | |
308 | else { | |
309 | rc = cifs_get_inode_info(&newinode, full_path, buf, | |
310 | inode->i_sb, xid, &fileHandle); | |
311 | if (newinode) { | |
312 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
313 | newinode->i_mode = mode; | |
314 | if ((oplock & CIFS_CREATE_ACTION) && | |
315 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) { | |
316 | newinode->i_uid = current_fsuid(); | |
317 | if (inode->i_mode & S_ISGID) | |
318 | newinode->i_gid = inode->i_gid; | |
319 | else | |
320 | newinode->i_gid = current_fsgid(); | |
6473a559 | 321 | } |
1da177e4 | 322 | } |
c3b2a0c6 | 323 | } |
1da177e4 | 324 | |
c3b2a0c6 SF |
325 | cifs_create_set_dentry: |
326 | if (rc == 0) | |
1c929cfe | 327 | d_instantiate(direntry, newinode); |
c3b2a0c6 | 328 | else |
b6b38f70 | 329 | cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
c3b2a0c6 | 330 | |
dd7dd556 | 331 | if (newinode && nd) { |
fdb36038 | 332 | struct cifsFileInfo *pfile_info; |
6ca9f3ba JL |
333 | struct file *filp; |
334 | ||
335 | filp = lookup_instantiate_filp(nd, direntry, generic_file_open); | |
336 | if (IS_ERR(filp)) { | |
337 | rc = PTR_ERR(filp); | |
338 | CIFSSMBClose(xid, tcon, fileHandle); | |
339 | goto cifs_create_out; | |
340 | } | |
341 | ||
abfe1eed | 342 | pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock); |
6ca9f3ba JL |
343 | if (pfile_info == NULL) { |
344 | fput(filp); | |
345 | CIFSSMBClose(xid, tcon, fileHandle); | |
fdb36038 | 346 | rc = -ENOMEM; |
6ca9f3ba | 347 | } |
2422f676 JL |
348 | } else { |
349 | CIFSSMBClose(xid, tcon, fileHandle); | |
5fdae1f6 | 350 | } |
2422f676 | 351 | |
d14537f1 SF |
352 | cifs_create_out: |
353 | kfree(buf); | |
354 | kfree(full_path); | |
7ffec372 | 355 | cifs_put_tlink(tlink); |
1da177e4 | 356 | FreeXid(xid); |
1da177e4 LT |
357 | return rc; |
358 | } | |
359 | ||
5fdae1f6 SF |
360 | int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, |
361 | dev_t device_number) | |
1da177e4 LT |
362 | { |
363 | int rc = -EPERM; | |
364 | int xid; | |
365 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 366 | struct tcon_link *tlink; |
96daf2b0 | 367 | struct cifs_tcon *pTcon; |
fa2989f4 | 368 | struct cifs_io_parms io_parms; |
1da177e4 | 369 | char *full_path = NULL; |
fb8c4b14 | 370 | struct inode *newinode = NULL; |
5d9ac7fd JL |
371 | int oplock = 0; |
372 | u16 fileHandle; | |
373 | FILE_ALL_INFO *buf = NULL; | |
374 | unsigned int bytes_written; | |
375 | struct win_dev *pdev; | |
1da177e4 LT |
376 | |
377 | if (!old_valid_dev(device_number)) | |
378 | return -EINVAL; | |
379 | ||
1da177e4 | 380 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
381 | tlink = cifs_sb_tlink(cifs_sb); |
382 | if (IS_ERR(tlink)) | |
383 | return PTR_ERR(tlink); | |
384 | ||
385 | pTcon = tlink_tcon(tlink); | |
386 | ||
387 | xid = GetXid(); | |
1da177e4 | 388 | |
1da177e4 | 389 | full_path = build_path_from_dentry(direntry); |
5d9ac7fd | 390 | if (full_path == NULL) { |
1da177e4 | 391 | rc = -ENOMEM; |
5d9ac7fd JL |
392 | goto mknod_out; |
393 | } | |
394 | ||
395 | if (pTcon->unix_ext) { | |
4e1e7fb9 | 396 | struct cifs_unix_set_info_args args = { |
ce3b0f8d | 397 | .mode = mode & ~current_umask(), |
4e1e7fb9 JL |
398 | .ctime = NO_CHANGE_64, |
399 | .atime = NO_CHANGE_64, | |
400 | .mtime = NO_CHANGE_64, | |
401 | .device = device_number, | |
402 | }; | |
5fdae1f6 | 403 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 DH |
404 | args.uid = (__u64) current_fsuid(); |
405 | args.gid = (__u64) current_fsgid(); | |
1da177e4 | 406 | } else { |
4e1e7fb9 JL |
407 | args.uid = NO_CHANGE_64; |
408 | args.gid = NO_CHANGE_64; | |
1da177e4 | 409 | } |
01ea95e3 JL |
410 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
411 | cifs_sb->local_nls, | |
412 | cifs_sb->mnt_cifs_flags & | |
413 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
5d9ac7fd JL |
414 | if (rc) |
415 | goto mknod_out; | |
1da177e4 | 416 | |
5d9ac7fd | 417 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f6 | 418 | inode->i_sb, xid); |
eda3c029 | 419 | |
5d9ac7fd JL |
420 | if (rc == 0) |
421 | d_instantiate(direntry, newinode); | |
422 | goto mknod_out; | |
1da177e4 LT |
423 | } |
424 | ||
5d9ac7fd JL |
425 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) |
426 | goto mknod_out; | |
427 | ||
428 | ||
429 | cFYI(1, "sfu compat create special file"); | |
430 | ||
431 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
432 | if (buf == NULL) { | |
433 | kfree(full_path); | |
434 | rc = -ENOMEM; | |
435 | FreeXid(xid); | |
436 | return rc; | |
437 | } | |
438 | ||
439 | /* FIXME: would WRITE_OWNER | WRITE_DAC be better? */ | |
440 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, | |
441 | GENERIC_WRITE, CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, | |
442 | &fileHandle, &oplock, buf, cifs_sb->local_nls, | |
443 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
444 | if (rc) | |
445 | goto mknod_out; | |
446 | ||
447 | /* BB Do not bother to decode buf since no local inode yet to put | |
448 | * timestamps in, but we can reuse it safely */ | |
449 | ||
450 | pdev = (struct win_dev *)buf; | |
fa2989f4 PS |
451 | io_parms.netfid = fileHandle; |
452 | io_parms.pid = current->tgid; | |
453 | io_parms.tcon = pTcon; | |
454 | io_parms.offset = 0; | |
455 | io_parms.length = sizeof(struct win_dev); | |
5d9ac7fd JL |
456 | if (S_ISCHR(mode)) { |
457 | memcpy(pdev->type, "IntxCHR", 8); | |
458 | pdev->major = | |
459 | cpu_to_le64(MAJOR(device_number)); | |
460 | pdev->minor = | |
461 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
462 | rc = CIFSSMBWrite(xid, &io_parms, |
463 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
464 | NULL, 0); |
465 | } else if (S_ISBLK(mode)) { | |
466 | memcpy(pdev->type, "IntxBLK", 8); | |
467 | pdev->major = | |
468 | cpu_to_le64(MAJOR(device_number)); | |
469 | pdev->minor = | |
470 | cpu_to_le64(MINOR(device_number)); | |
fa2989f4 PS |
471 | rc = CIFSSMBWrite(xid, &io_parms, |
472 | &bytes_written, (char *)pdev, | |
5d9ac7fd JL |
473 | NULL, 0); |
474 | } /* else if (S_ISFIFO) */ | |
475 | CIFSSMBClose(xid, pTcon, fileHandle); | |
476 | d_drop(direntry); | |
477 | ||
478 | /* FIXME: add code here to set EAs */ | |
479 | ||
480 | mknod_out: | |
d14537f1 | 481 | kfree(full_path); |
5d9ac7fd | 482 | kfree(buf); |
1da177e4 | 483 | FreeXid(xid); |
7ffec372 | 484 | cifs_put_tlink(tlink); |
1da177e4 LT |
485 | return rc; |
486 | } | |
487 | ||
1da177e4 | 488 | struct dentry * |
5fdae1f6 SF |
489 | cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, |
490 | struct nameidata *nd) | |
1da177e4 LT |
491 | { |
492 | int xid; | |
493 | int rc = 0; /* to get around spurious gcc warning, set to zero here */ | |
590a3fe0 | 494 | __u32 oplock = 0; |
a6ce4932 SF |
495 | __u16 fileHandle = 0; |
496 | bool posix_open = false; | |
1da177e4 | 497 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 498 | struct tcon_link *tlink; |
96daf2b0 | 499 | struct cifs_tcon *pTcon; |
2422f676 | 500 | struct cifsFileInfo *cfile; |
1da177e4 LT |
501 | struct inode *newInode = NULL; |
502 | char *full_path = NULL; | |
a6ce4932 | 503 | struct file *filp; |
1da177e4 LT |
504 | |
505 | xid = GetXid(); | |
506 | ||
b6b38f70 JP |
507 | cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", |
508 | parent_dir_inode, direntry->d_name.name, direntry); | |
1da177e4 | 509 | |
1da177e4 LT |
510 | /* check whether path exists */ |
511 | ||
512 | cifs_sb = CIFS_SB(parent_dir_inode->i_sb); | |
7ffec372 JL |
513 | tlink = cifs_sb_tlink(cifs_sb); |
514 | if (IS_ERR(tlink)) { | |
515 | FreeXid(xid); | |
516 | return (struct dentry *)tlink; | |
517 | } | |
518 | pTcon = tlink_tcon(tlink); | |
1da177e4 | 519 | |
296034f7 SF |
520 | /* |
521 | * Don't allow the separator character in a path component. | |
522 | * The VFS will not allow "/", but "\" is allowed by posix. | |
523 | */ | |
524 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) { | |
525 | int i; | |
526 | for (i = 0; i < direntry->d_name.len; i++) | |
527 | if (direntry->d_name.name[i] == '\\') { | |
b6b38f70 | 528 | cFYI(1, "Invalid file name"); |
7ffec372 JL |
529 | rc = -EINVAL; |
530 | goto lookup_out; | |
296034f7 SF |
531 | } |
532 | } | |
533 | ||
5ddf1e0f JL |
534 | /* |
535 | * O_EXCL: optimize away the lookup, but don't hash the dentry. Let | |
536 | * the VFS handle the create. | |
537 | */ | |
8e6c0332 | 538 | if (nd && (nd->flags & LOOKUP_EXCL)) { |
5ddf1e0f | 539 | d_instantiate(direntry, NULL); |
7ffec372 JL |
540 | rc = 0; |
541 | goto lookup_out; | |
5ddf1e0f JL |
542 | } |
543 | ||
1da177e4 LT |
544 | /* can not grab the rename sem here since it would |
545 | deadlock in the cases (beginning of sys_rename itself) | |
546 | in which we already have the sb rename sem */ | |
547 | full_path = build_path_from_dentry(direntry); | |
5fdae1f6 | 548 | if (full_path == NULL) { |
7ffec372 JL |
549 | rc = -ENOMEM; |
550 | goto lookup_out; | |
1da177e4 LT |
551 | } |
552 | ||
553 | if (direntry->d_inode != NULL) { | |
b6b38f70 | 554 | cFYI(1, "non-NULL inode in lookup"); |
1da177e4 | 555 | } else { |
b6b38f70 | 556 | cFYI(1, "NULL inode in lookup"); |
1da177e4 | 557 | } |
b6b38f70 | 558 | cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); |
1da177e4 | 559 | |
8db14ca1 SF |
560 | /* Posix open is only called (at lookup time) for file create now. |
561 | * For opens (rather than creates), because we do not know if it | |
562 | * is a file or directory yet, and current Samba no longer allows | |
563 | * us to do posix open on dirs, we could end up wasting an open call | |
564 | * on what turns out to be a dir. For file opens, we wait to call posix | |
565 | * open till cifs_open. It could be added here (lookup) in the future | |
566 | * but the performance tradeoff of the extra network request when EISDIR | |
567 | * or EACCES is returned would have to be weighed against the 50% | |
568 | * reduction in network traffic in the other paths. | |
569 | */ | |
a6ce4932 | 570 | if (pTcon->unix_ext) { |
8e6c0332 | 571 | if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) && |
8db14ca1 | 572 | (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && |
608712fe | 573 | (nd->intent.open.file->f_flags & O_CREAT)) { |
2422f676 | 574 | rc = cifs_posix_open(full_path, &newInode, |
fa588e0c | 575 | parent_dir_inode->i_sb, |
703a3b8e | 576 | nd->intent.open.create_mode, |
608712fe | 577 | nd->intent.open.file->f_flags, &oplock, |
a6ce4932 | 578 | &fileHandle, xid); |
8db14ca1 SF |
579 | /* |
580 | * The check below works around a bug in POSIX | |
581 | * open in samba versions 3.3.1 and earlier where | |
582 | * open could incorrectly fail with invalid parameter. | |
583 | * If either that or op not supported returned, follow | |
584 | * the normal lookup. | |
585 | */ | |
586 | if ((rc == 0) || (rc == -ENOENT)) | |
587 | posix_open = true; | |
588 | else if ((rc == -EINVAL) || (rc != -EOPNOTSUPP)) | |
589 | pTcon->broken_posix_open = true; | |
a6ce4932 SF |
590 | } |
591 | if (!posix_open) | |
592 | rc = cifs_get_inode_info_unix(&newInode, full_path, | |
593 | parent_dir_inode->i_sb, xid); | |
594 | } else | |
1da177e4 | 595 | rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932 | 596 | parent_dir_inode->i_sb, xid, NULL); |
1da177e4 LT |
597 | |
598 | if ((rc == 0) && (newInode != NULL)) { | |
1da177e4 | 599 | d_add(direntry, newInode); |
2422f676 | 600 | if (posix_open) { |
6ca9f3ba JL |
601 | filp = lookup_instantiate_filp(nd, direntry, |
602 | generic_file_open); | |
603 | if (IS_ERR(filp)) { | |
604 | rc = PTR_ERR(filp); | |
605 | CIFSSMBClose(xid, pTcon, fileHandle); | |
606 | goto lookup_out; | |
607 | } | |
608 | ||
abfe1eed JL |
609 | cfile = cifs_new_fileinfo(fileHandle, filp, tlink, |
610 | oplock); | |
2422f676 | 611 | if (cfile == NULL) { |
6ca9f3ba | 612 | fput(filp); |
2422f676 JL |
613 | CIFSSMBClose(xid, pTcon, fileHandle); |
614 | rc = -ENOMEM; | |
615 | goto lookup_out; | |
616 | } | |
2422f676 | 617 | } |
5fdae1f6 | 618 | /* since paths are not looked up by component - the parent |
3abb9272 | 619 | directories are presumed to be good here */ |
1da177e4 LT |
620 | renew_parental_timestamps(direntry); |
621 | ||
622 | } else if (rc == -ENOENT) { | |
623 | rc = 0; | |
3abb9272 | 624 | direntry->d_time = jiffies; |
1da177e4 | 625 | d_add(direntry, NULL); |
5fdae1f6 SF |
626 | /* if it was once a directory (but how can we tell?) we could do |
627 | shrink_dcache_parent(direntry); */ | |
ed2b9170 | 628 | } else if (rc != -EACCES) { |
b6b38f70 | 629 | cERROR(1, "Unexpected lookup error %d", rc); |
ed2b9170 SF |
630 | /* We special case check for Access Denied - since that |
631 | is a common return code */ | |
1da177e4 LT |
632 | } |
633 | ||
2422f676 | 634 | lookup_out: |
d14537f1 | 635 | kfree(full_path); |
7ffec372 | 636 | cifs_put_tlink(tlink); |
1da177e4 LT |
637 | FreeXid(xid); |
638 | return ERR_PTR(rc); | |
639 | } | |
640 | ||
1da177e4 LT |
641 | static int |
642 | cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) | |
643 | { | |
34286d66 NP |
644 | if (nd->flags & LOOKUP_RCU) |
645 | return -ECHILD; | |
646 | ||
1da177e4 | 647 | if (direntry->d_inode) { |
df2cf170 | 648 | if (cifs_revalidate_dentry(direntry)) |
1da177e4 | 649 | return 0; |
262f86ad NP |
650 | else |
651 | return 1; | |
1da177e4 LT |
652 | } |
653 | ||
262f86ad NP |
654 | /* |
655 | * This may be nfsd (or something), anyway, we can't see the | |
656 | * intent of this. So, since this can be for creation, drop it. | |
657 | */ | |
658 | if (!nd) | |
659 | return 0; | |
660 | ||
661 | /* | |
662 | * Drop the negative dentry, in order to make sure to use the | |
663 | * case sensitive name which is specified by user if this is | |
664 | * for creation. | |
665 | */ | |
666 | if (!(nd->flags & (LOOKUP_CONTINUE | LOOKUP_PARENT))) { | |
667 | if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) | |
668 | return 0; | |
669 | } | |
670 | ||
671 | if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) | |
672 | return 0; | |
673 | ||
674 | return 1; | |
1da177e4 LT |
675 | } |
676 | ||
677 | /* static int cifs_d_delete(struct dentry *direntry) | |
678 | { | |
679 | int rc = 0; | |
680 | ||
b6b38f70 | 681 | cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
1da177e4 LT |
682 | |
683 | return rc; | |
684 | } */ | |
685 | ||
4fd03e84 | 686 | const struct dentry_operations cifs_dentry_ops = { |
1da177e4 | 687 | .d_revalidate = cifs_d_revalidate, |
01c64fea | 688 | .d_automount = cifs_dfs_d_automount, |
5fdae1f6 | 689 | /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4 | 690 | }; |
b92327fe | 691 | |
b1e6a015 NP |
692 | static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, |
693 | struct qstr *q) | |
b92327fe | 694 | { |
b1e6a015 | 695 | struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; |
b92327fe SF |
696 | unsigned long hash; |
697 | int i; | |
698 | ||
699 | hash = init_name_hash(); | |
700 | for (i = 0; i < q->len; i++) | |
701 | hash = partial_name_hash(nls_tolower(codepage, q->name[i]), | |
702 | hash); | |
703 | q->hash = end_name_hash(hash); | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
621e155a NP |
708 | static int cifs_ci_compare(const struct dentry *parent, |
709 | const struct inode *pinode, | |
710 | const struct dentry *dentry, const struct inode *inode, | |
711 | unsigned int len, const char *str, const struct qstr *name) | |
b92327fe | 712 | { |
621e155a | 713 | struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; |
b92327fe | 714 | |
621e155a NP |
715 | if ((name->len == len) && |
716 | (nls_strnicmp(codepage, name->name, str, len) == 0)) | |
b92327fe | 717 | return 0; |
b92327fe SF |
718 | return 1; |
719 | } | |
720 | ||
4fd03e84 | 721 | const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe SF |
722 | .d_revalidate = cifs_d_revalidate, |
723 | .d_hash = cifs_ci_hash, | |
724 | .d_compare = cifs_ci_compare, | |
01c64fea | 725 | .d_automount = cifs_dfs_d_automount, |
b92327fe | 726 | }; |