blob: 5699b5036ed805189d367796d9a673730e773b8b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/dir.c
3 *
4 * vfs operations that deal with dentries
Steve French5fdae1f2007-06-05 18:30:44 +00005 *
Steve Frenchc3b2a0c2009-02-20 04:32:45 +00006 * Copyright (C) International Business Machines Corp., 2002,2009
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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>
Jeff Layton3bc303c2009-09-21 06:47:50 -040027#include <linux/mount.h>
Jeff Layton6ca9f3b2010-06-16 13:40:16 -040028#include <linux/file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#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
Steve French99ee4db2007-02-27 05:35:17 +000036static void
Linus Torvalds1da177e2005-04-16 15:20:36 -070037renew_parental_timestamps(struct dentry *direntry)
38{
Steve French5fdae1f2007-06-05 18:30:44 +000039 /* BB check if there is a way to get the kernel to do this or if we
40 really need this */
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 do {
42 direntry->d_time = jiffies;
43 direntry = direntry->d_parent;
Steve French5fdae1f2007-06-05 18:30:44 +000044 } while (!IS_ROOT(direntry));
Linus Torvalds1da177e2005-04-16 15:20:36 -070045}
46
Steve French6d3ea7e2012-11-28 22:34:41 -060047char *
48cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
49 struct cifs_tcon *tcon)
50{
Jeff Layton839db3d2012-12-10 06:10:45 -050051 int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
Steve French6d3ea7e2012-11-28 22:34:41 -060052 int dfsplen;
53 char *full_path = NULL;
54
55 /* if no prefix path, simply set path to the root of share to "" */
56 if (pplen == 0) {
57 full_path = kzalloc(1, GFP_KERNEL);
58 return full_path;
59 }
60
61 if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
62 dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
63 else
64 dfsplen = 0;
65
66 full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL);
67 if (full_path == NULL)
68 return full_path;
69
70 if (dfsplen)
71 strncpy(full_path, tcon->treeName, dfsplen);
Jeff Layton839db3d2012-12-10 06:10:45 -050072 full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb);
73 strncpy(full_path + dfsplen + 1, vol->prepath, pplen);
Steve French6d3ea7e2012-11-28 22:34:41 -060074 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
75 full_path[dfsplen + pplen] = 0; /* add trailing null */
76 return full_path;
77}
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079/* Note: caller must free return buffer */
80char *
81build_path_from_dentry(struct dentry *direntry)
82{
83 struct dentry *temp;
Steve French2fe87f02006-09-21 07:02:52 +000084 int namelen;
Steve French646dd532008-05-15 01:50:56 +000085 int dfsplen;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 char *full_path;
Steve French88274812006-03-09 22:21:45 +000087 char dirsep;
Jeff Layton0d424ad2010-09-20 16:01:35 -070088 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
Steve French96daf2b2011-05-27 04:34:02 +000089 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
Al Virodc137bf2011-07-16 23:37:20 -040090 unsigned seq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Steve French646dd532008-05-15 01:50:56 +000092 dirsep = CIFS_DIR_SEP(cifs_sb);
Jeff Layton0d424ad2010-09-20 16:01:35 -070093 if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
94 dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
Steve French646dd532008-05-15 01:50:56 +000095 else
96 dfsplen = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097cifs_bp_rename_retry:
Steve Frenchf87d39d2011-05-27 03:50:55 +000098 namelen = dfsplen;
Al Virodc137bf2011-07-16 23:37:20 -040099 seq = read_seqbegin(&rename_lock);
100 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 for (temp = direntry; !IS_ROOT(temp);) {
102 namelen += (1 + temp->d_name.len);
103 temp = temp->d_parent;
Steve French5fdae1f2007-06-05 18:30:44 +0000104 if (temp == NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500105 cifs_dbg(VFS, "corrupt dentry\n");
Al Virodc137bf2011-07-16 23:37:20 -0400106 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 return NULL;
108 }
109 }
Al Virodc137bf2011-07-16 23:37:20 -0400110 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
112 full_path = kmalloc(namelen+1, GFP_KERNEL);
Steve French5fdae1f2007-06-05 18:30:44 +0000113 if (full_path == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 return full_path;
115 full_path[namelen] = 0; /* trailing null */
Al Virodc137bf2011-07-16 23:37:20 -0400116 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 for (temp = direntry; !IS_ROOT(temp);) {
Al Virodc137bf2011-07-16 23:37:20 -0400118 spin_lock(&temp->d_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 namelen -= 1 + temp->d_name.len;
120 if (namelen < 0) {
Al Virodc137bf2011-07-16 23:37:20 -0400121 spin_unlock(&temp->d_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 break;
123 } else {
Steve French7f573562005-08-30 11:32:14 -0700124 full_path[namelen] = dirsep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 strncpy(full_path + namelen + 1, temp->d_name.name,
126 temp->d_name.len);
Joe Perchesf96637b2013-05-04 22:12:25 -0500127 cifs_dbg(FYI, "name: %s\n", full_path + namelen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 }
Al Virodc137bf2011-07-16 23:37:20 -0400129 spin_unlock(&temp->d_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 temp = temp->d_parent;
Steve French5fdae1f2007-06-05 18:30:44 +0000131 if (temp == NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500132 cifs_dbg(VFS, "corrupt dentry\n");
Al Virodc137bf2011-07-16 23:37:20 -0400133 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 kfree(full_path);
135 return NULL;
136 }
137 }
Al Virodc137bf2011-07-16 23:37:20 -0400138 rcu_read_unlock();
139 if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500140 cifs_dbg(FYI, "did not end path lookup where expected. namelen=%ddfsplen=%d\n",
141 namelen, dfsplen);
Steve French5fdae1f2007-06-05 18:30:44 +0000142 /* presumably this is only possible if racing with a rename
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 of one of the parent directories (we can not lock the dentries
144 above us to prevent this, but retrying should be harmless) */
145 kfree(full_path);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 goto cifs_bp_rename_retry;
147 }
Steve French2fe87f02006-09-21 07:02:52 +0000148 /* DIR_SEP already set for byte 0 / vs \ but not for
149 subsequent slashes in prepath which currently must
150 be entered the right way - not sure if there is an alternative
151 since the '\' is a valid posix character so we can not switch
152 those safely to '/' if any are found in the middle of the prepath */
153 /* BB test paths to Windows with '/' in the midst of prepath */
Steve French646dd532008-05-15 01:50:56 +0000154
155 if (dfsplen) {
Jeff Layton0d424ad2010-09-20 16:01:35 -0700156 strncpy(full_path, tcon->treeName, dfsplen);
Steve French646dd532008-05-15 01:50:56 +0000157 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
158 int i;
159 for (i = 0; i < dfsplen; i++) {
160 if (full_path[i] == '\\')
161 full_path[i] = '/';
162 }
163 }
164 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 return full_path;
166}
167
Miklos Szeredid2c12712012-06-05 15:10:23 +0200168/*
169 * Don't allow the separator character in a path component.
170 * The VFS will not allow "/", but "\" is allowed by posix.
171 */
172static int
173check_name(struct dentry *direntry)
174{
175 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
176 int i;
177
178 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
179 for (i = 0; i < direntry->d_name.len; i++) {
180 if (direntry->d_name.name[i] == '\\') {
Joe Perchesf96637b2013-05-04 22:12:25 -0500181 cifs_dbg(FYI, "Invalid file name\n");
Miklos Szeredid2c12712012-06-05 15:10:23 +0200182 return -EINVAL;
183 }
184 }
185 }
186 return 0;
187}
188
189
Steve French39798772006-05-31 22:40:51 +0000190/* Inode operations in similar order to how they appear in Linux file fs.h */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400192static int
193cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid,
194 struct tcon_link *tlink, unsigned oflags, umode_t mode,
Pavel Shilovsky25364132012-09-18 16:20:27 -0700195 __u32 *oplock, struct cifs_fid *fid, int *created)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196{
197 int rc = -ENOENT;
Jeff Layton67750fb2008-05-09 22:28:02 +0000198 int create_options = CREATE_NOT_DIR;
Pavel Shilovsky25364132012-09-18 16:20:27 -0700199 int desired_access;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200200 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
201 struct cifs_tcon *tcon = tlink_tcon(tlink);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 char *full_path = NULL;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000203 FILE_ALL_INFO *buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 struct inode *newinode = NULL;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200205 int disposition;
Pavel Shilovsky25364132012-09-18 16:20:27 -0700206 struct TCP_Server_Info *server = tcon->ses->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
Miklos Szeredid2c12712012-06-05 15:10:23 +0200208 *oplock = 0;
Pavel Shilovsky10b9b982012-03-20 12:55:09 +0300209 if (tcon->ses->server->oplocks)
Miklos Szeredid2c12712012-06-05 15:10:23 +0200210 *oplock = REQ_OPLOCK;
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000211
Jeff Layton7ffec372010-09-29 19:51:11 -0400212 full_path = build_path_from_dentry(direntry);
213 if (full_path == NULL) {
214 rc = -ENOMEM;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200215 goto out;
Jeff Layton7ffec372010-09-29 19:51:11 -0400216 }
217
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400218 if (tcon->unix_ext && cap_unix(tcon->ses) && !tcon->broken_posix_open &&
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000219 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
220 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
Pavel Shilovsky25364132012-09-18 16:20:27 -0700221 rc = cifs_posix_open(full_path, &newinode, inode->i_sb, mode,
222 oflags, oplock, &fid->netfid, xid);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200223 switch (rc) {
224 case 0:
225 if (newinode == NULL) {
226 /* query inode info */
Steve French90e4ee52009-05-08 03:04:30 +0000227 goto cifs_create_get_file_info;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200228 }
229
230 if (!S_ISREG(newinode->i_mode)) {
231 /*
232 * The server may allow us to open things like
233 * FIFOs, but the client isn't set up to deal
234 * with that. If it's not a regular file, just
235 * close it and proceed as if it were a normal
236 * lookup.
237 */
Pavel Shilovsky25364132012-09-18 16:20:27 -0700238 CIFSSMBClose(xid, tcon, fid->netfid);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200239 goto cifs_create_get_file_info;
240 }
241 /* success, no need to query */
242 goto cifs_create_set_dentry;
243
244 case -ENOENT:
245 goto cifs_create_get_file_info;
246
247 case -EIO:
248 case -EINVAL:
249 /*
250 * EIO could indicate that (posix open) operation is not
251 * supported, despite what server claimed in capability
252 * negotiation.
253 *
254 * POSIX open in samba versions 3.3.1 and earlier could
255 * incorrectly fail with invalid parameter.
256 */
257 tcon->broken_posix_open = true;
258 break;
259
260 case -EREMOTE:
261 case -EOPNOTSUPP:
262 /*
263 * EREMOTE indicates DFS junction, which is not handled
264 * in posix open. If either that or op not supported
265 * returned, follow the normal lookup.
266 */
267 break;
268
269 default:
270 goto out;
271 }
272 /*
273 * fallthrough to retry, using older open call, this is case
274 * where server does not support this SMB level, and falsely
275 * claims capability (also get here for DFS case which should be
276 * rare for path not covered on files)
277 */
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000278 }
Steve Frenchf818dd52009-01-19 02:38:35 +0000279
Pavel Shilovsky25364132012-09-18 16:20:27 -0700280 desired_access = 0;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200281 if (OPEN_FMODE(oflags) & FMODE_READ)
Pavel Shilovsky25364132012-09-18 16:20:27 -0700282 desired_access |= GENERIC_READ; /* is this too little? */
Miklos Szeredid2c12712012-06-05 15:10:23 +0200283 if (OPEN_FMODE(oflags) & FMODE_WRITE)
Pavel Shilovsky25364132012-09-18 16:20:27 -0700284 desired_access |= GENERIC_WRITE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Miklos Szeredid2c12712012-06-05 15:10:23 +0200286 disposition = FILE_OVERWRITE_IF;
287 if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
288 disposition = FILE_CREATE;
289 else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
290 disposition = FILE_OVERWRITE_IF;
291 else if ((oflags & O_CREAT) == O_CREAT)
292 disposition = FILE_OPEN_IF;
293 else
Joe Perchesf96637b2013-05-04 22:12:25 -0500294 cifs_dbg(FYI, "Create flag not set in create function\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
Pavel Shilovsky25364132012-09-18 16:20:27 -0700296 /*
297 * BB add processing to set equivalent of mode - e.g. via CreateX with
298 * ACLs
299 */
300
301 if (!server->ops->open) {
302 rc = -ENOSYS;
303 goto out;
304 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
Steve French5fdae1f2007-06-05 18:30:44 +0000306 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
307 if (buf == NULL) {
Jeff Layton232341b2010-08-05 13:58:38 -0400308 rc = -ENOMEM;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200309 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 }
Jeff Layton67750fb2008-05-09 22:28:02 +0000311
Jeff Layton67750fb2008-05-09 22:28:02 +0000312 /*
313 * if we're not using unix extensions, see if we need to set
314 * ATTR_READONLY on the create call
315 */
Steve Frenchf818dd52009-01-19 02:38:35 +0000316 if (!tcon->unix_ext && (mode & S_IWUGO) == 0)
Jeff Layton67750fb2008-05-09 22:28:02 +0000317 create_options |= CREATE_OPTION_READONLY;
318
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -0500319 if (backup_cred(cifs_sb))
320 create_options |= CREATE_OPEN_BACKUP_INTENT;
321
Pavel Shilovsky25364132012-09-18 16:20:27 -0700322 rc = server->ops->open(xid, tcon, full_path, disposition,
323 desired_access, create_options, fid, oplock,
324 buf, cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500326 cifs_dbg(FYI, "cifs_create returned 0x%x\n", rc);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200327 goto out;
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000328 }
329
Pavel Shilovsky25364132012-09-18 16:20:27 -0700330 /*
331 * If Open reported that we actually created a file then we now have to
332 * set the mode if possible.
333 */
Miklos Szeredid2c12712012-06-05 15:10:23 +0200334 if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) {
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000335 struct cifs_unix_set_info_args args = {
Jeff Layton4e1e7fb2008-08-02 07:26:12 -0400336 .mode = mode,
337 .ctime = NO_CHANGE_64,
338 .atime = NO_CHANGE_64,
339 .mtime = NO_CHANGE_64,
340 .device = 0,
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000341 };
Jeff Layton4e1e7fb2008-08-02 07:26:12 -0400342
Al Viro47237682012-06-10 05:01:45 -0400343 *created |= FILE_CREATED;
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000344 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
Eric W. Biederman49418b22013-02-06 00:57:56 -0800345 args.uid = current_fsuid();
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000346 if (inode->i_mode & S_ISGID)
Eric W. Biederman49418b22013-02-06 00:57:56 -0800347 args.gid = inode->i_gid;
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000348 else
Eric W. Biederman49418b22013-02-06 00:57:56 -0800349 args.gid = current_fsgid();
Steve French3ce53fc2007-06-08 14:55:14 +0000350 } else {
Eric W. Biederman49418b22013-02-06 00:57:56 -0800351 args.uid = INVALID_UID; /* no change */
352 args.gid = INVALID_GID; /* no change */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 }
Pavel Shilovsky25364132012-09-18 16:20:27 -0700354 CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid->netfid,
355 current->tgid);
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000356 } else {
Pavel Shilovsky25364132012-09-18 16:20:27 -0700357 /*
358 * BB implement mode setting via Windows security
359 * descriptors e.g.
360 */
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000361 /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000363 /* Could set r/o dos attribute if mode & 0222 == 0 */
364 }
365
366cifs_create_get_file_info:
367 /* server might mask mode so we have to query for it */
368 if (tcon->unix_ext)
Pavel Shilovsky25364132012-09-18 16:20:27 -0700369 rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb,
370 xid);
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000371 else {
Pavel Shilovsky25364132012-09-18 16:20:27 -0700372 rc = cifs_get_inode_info(&newinode, full_path, buf, inode->i_sb,
373 xid, &fid->netfid);
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000374 if (newinode) {
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700375 if (server->ops->set_lease_key)
376 server->ops->set_lease_key(newinode, fid);
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000377 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
378 newinode->i_mode = mode;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200379 if ((*oplock & CIFS_CREATE_ACTION) &&
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000380 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) {
381 newinode->i_uid = current_fsuid();
382 if (inode->i_mode & S_ISGID)
383 newinode->i_gid = inode->i_gid;
384 else
385 newinode->i_gid = current_fsgid();
Steve French6473a552005-11-29 20:20:10 -0800386 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 }
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000388 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
Steve Frenchc3b2a0c2009-02-20 04:32:45 +0000390cifs_create_set_dentry:
Miklos Szeredid2c12712012-06-05 15:10:23 +0200391 if (rc != 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500392 cifs_dbg(FYI, "Create worked, get_inode_info failed rc = %d\n",
393 rc);
Pavel Shilovsky25364132012-09-18 16:20:27 -0700394 if (server->ops->close)
395 server->ops->close(xid, tcon, fid);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200396 goto out;
Steve French5fdae1f2007-06-05 18:30:44 +0000397 }
Miklos Szeredid2c12712012-06-05 15:10:23 +0200398 d_drop(direntry);
399 d_add(direntry, newinode);
Jeff Layton2422f672010-06-16 13:40:16 -0400400
Miklos Szeredid2c12712012-06-05 15:10:23 +0200401out:
Steve Frenchd14537f12005-04-28 22:41:05 -0700402 kfree(buf);
403 kfree(full_path);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200404 return rc;
405}
406
Al Virod9585272012-06-22 12:39:14 +0400407int
Miklos Szeredid2c12712012-06-05 15:10:23 +0200408cifs_atomic_open(struct inode *inode, struct dentry *direntry,
Al Viro30d90492012-06-22 12:40:19 +0400409 struct file *file, unsigned oflags, umode_t mode,
Al Viro47237682012-06-10 05:01:45 -0400410 int *opened)
Miklos Szeredid2c12712012-06-05 15:10:23 +0200411{
412 int rc;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400413 unsigned int xid;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200414 struct tcon_link *tlink;
415 struct cifs_tcon *tcon;
Pavel Shilovsky25364132012-09-18 16:20:27 -0700416 struct TCP_Server_Info *server;
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700417 struct cifs_fid fid;
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700418 struct cifs_pending_open open;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200419 __u32 oplock;
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700420 struct cifsFileInfo *file_info;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200421
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700422 /*
423 * Posix open is only called (at lookup time) for file create now. For
Miklos Szeredid2c12712012-06-05 15:10:23 +0200424 * opens (rather than creates), because we do not know if it is a file
425 * or directory yet, and current Samba no longer allows us to do posix
426 * open on dirs, we could end up wasting an open call on what turns out
427 * to be a dir. For file opens, we wait to call posix open till
428 * cifs_open. It could be added to atomic_open in the future but the
429 * performance tradeoff of the extra network request when EISDIR or
430 * EACCES is returned would have to be weighed against the 50% reduction
431 * in network traffic in the other paths.
432 */
433 if (!(oflags & O_CREAT)) {
Sachin Prabhu3798f472012-11-05 11:39:32 +0000434 struct dentry *res;
435
436 /*
437 * Check for hashed negative dentry. We have already revalidated
438 * the dentry and it is fine. No need to perform another lookup.
439 */
440 if (!d_unhashed(direntry))
441 return -ENOENT;
442
443 res = cifs_lookup(inode, direntry, 0);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200444 if (IS_ERR(res))
Al Virod9585272012-06-22 12:39:14 +0400445 return PTR_ERR(res);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200446
Al Viroe45198a2012-06-10 06:48:09 -0400447 return finish_no_open(file, res);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200448 }
449
450 rc = check_name(direntry);
451 if (rc)
Al Virod9585272012-06-22 12:39:14 +0400452 return rc;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200453
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400454 xid = get_xid();
Miklos Szeredid2c12712012-06-05 15:10:23 +0200455
Joe Perchesf96637b2013-05-04 22:12:25 -0500456 cifs_dbg(FYI, "parent inode = 0x%p name is: %s and dentry = 0x%p\n",
457 inode, direntry->d_name.name, direntry);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200458
459 tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
Wei Yongjunefb79f22013-04-04 14:16:21 +0800460 if (IS_ERR(tlink)) {
461 rc = PTR_ERR(tlink);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400462 goto out_free_xid;
Wei Yongjunefb79f22013-04-04 14:16:21 +0800463 }
Miklos Szeredid2c12712012-06-05 15:10:23 +0200464
465 tcon = tlink_tcon(tlink);
Pavel Shilovsky25364132012-09-18 16:20:27 -0700466 server = tcon->ses->server;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200467
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700468 if (server->ops->new_lease_key)
469 server->ops->new_lease_key(&fid);
470
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700471 cifs_add_pending_open(&fid, tlink, &open);
472
Miklos Szeredid2c12712012-06-05 15:10:23 +0200473 rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
Pavel Shilovsky25364132012-09-18 16:20:27 -0700474 &oplock, &fid, opened);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200475
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700476 if (rc) {
477 cifs_del_pending_open(&open);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200478 goto out;
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700479 }
Miklos Szeredid2c12712012-06-05 15:10:23 +0200480
Al Viro30d90492012-06-22 12:40:19 +0400481 rc = finish_open(file, direntry, generic_file_open, opened);
482 if (rc) {
Pavel Shilovsky25364132012-09-18 16:20:27 -0700483 if (server->ops->close)
484 server->ops->close(xid, tcon, &fid);
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700485 cifs_del_pending_open(&open);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200486 goto out;
487 }
488
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700489 file_info = cifs_new_fileinfo(&fid, file, tlink, oplock);
490 if (file_info == NULL) {
Pavel Shilovsky25364132012-09-18 16:20:27 -0700491 if (server->ops->close)
492 server->ops->close(xid, tcon, &fid);
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700493 cifs_del_pending_open(&open);
Al Virod9585272012-06-22 12:39:14 +0400494 rc = -ENOMEM;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200495 }
496
497out:
Jeff Layton7ffec372010-09-29 19:51:11 -0400498 cifs_put_tlink(tlink);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400499out_free_xid:
500 free_xid(xid);
Al Virod9585272012-06-22 12:39:14 +0400501 return rc;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200502}
503
504int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
Al Viroebfc3b42012-06-10 18:05:36 -0400505 bool excl)
Miklos Szeredid2c12712012-06-05 15:10:23 +0200506{
507 int rc;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400508 unsigned int xid = get_xid();
Miklos Szeredid2c12712012-06-05 15:10:23 +0200509 /*
510 * BB below access is probably too much for mknod to request
511 * but we have to do query and setpathinfo so requesting
512 * less could fail (unless we want to request getatr and setatr
513 * permissions (only). At least for POSIX we do not have to
514 * request so much.
515 */
516 unsigned oflags = O_EXCL | O_CREAT | O_RDWR;
517 struct tcon_link *tlink;
Pavel Shilovsky25364132012-09-18 16:20:27 -0700518 struct cifs_tcon *tcon;
519 struct TCP_Server_Info *server;
520 struct cifs_fid fid;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200521 __u32 oplock;
Al Viro47237682012-06-10 05:01:45 -0400522 int created = FILE_CREATED;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200523
Joe Perchesf96637b2013-05-04 22:12:25 -0500524 cifs_dbg(FYI, "cifs_create parent inode = 0x%p name is: %s and dentry = 0x%p\n",
525 inode, direntry->d_name.name, direntry);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200526
527 tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
528 rc = PTR_ERR(tlink);
529 if (IS_ERR(tlink))
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400530 goto out_free_xid;
Miklos Szeredid2c12712012-06-05 15:10:23 +0200531
Pavel Shilovsky25364132012-09-18 16:20:27 -0700532 tcon = tlink_tcon(tlink);
533 server = tcon->ses->server;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700534
535 if (server->ops->new_lease_key)
536 server->ops->new_lease_key(&fid);
537
538 rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
539 &oplock, &fid, &created);
Pavel Shilovsky25364132012-09-18 16:20:27 -0700540 if (!rc && server->ops->close)
541 server->ops->close(xid, tcon, &fid);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200542
543 cifs_put_tlink(tlink);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400544out_free_xid:
545 free_xid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 return rc;
547}
548
Al Viro1a67aaf2011-07-26 01:52:52 -0400549int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode,
Steve French5fdae1f2007-06-05 18:30:44 +0000550 dev_t device_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551{
552 int rc = -EPERM;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400553 unsigned int xid;
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -0500554 int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 struct cifs_sb_info *cifs_sb;
Jeff Layton7ffec372010-09-29 19:51:11 -0400556 struct tcon_link *tlink;
Steve French96daf2b2011-05-27 04:34:02 +0000557 struct cifs_tcon *pTcon;
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +0400558 struct cifs_io_parms io_parms;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 char *full_path = NULL;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000560 struct inode *newinode = NULL;
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400561 int oplock = 0;
562 u16 fileHandle;
563 FILE_ALL_INFO *buf = NULL;
564 unsigned int bytes_written;
565 struct win_dev *pdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
567 if (!old_valid_dev(device_number))
568 return -EINVAL;
569
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 cifs_sb = CIFS_SB(inode->i_sb);
Jeff Layton7ffec372010-09-29 19:51:11 -0400571 tlink = cifs_sb_tlink(cifs_sb);
572 if (IS_ERR(tlink))
573 return PTR_ERR(tlink);
574
575 pTcon = tlink_tcon(tlink);
576
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400577 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 full_path = build_path_from_dentry(direntry);
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400580 if (full_path == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 rc = -ENOMEM;
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400582 goto mknod_out;
583 }
584
585 if (pTcon->unix_ext) {
Jeff Layton4e1e7fb2008-08-02 07:26:12 -0400586 struct cifs_unix_set_info_args args = {
Al Viroce3b0f82009-03-29 19:08:22 -0400587 .mode = mode & ~current_umask(),
Jeff Layton4e1e7fb2008-08-02 07:26:12 -0400588 .ctime = NO_CHANGE_64,
589 .atime = NO_CHANGE_64,
590 .mtime = NO_CHANGE_64,
591 .device = device_number,
592 };
Steve French5fdae1f2007-06-05 18:30:44 +0000593 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
Eric W. Biederman49418b22013-02-06 00:57:56 -0800594 args.uid = current_fsuid();
595 args.gid = current_fsgid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 } else {
Eric W. Biederman49418b22013-02-06 00:57:56 -0800597 args.uid = INVALID_UID; /* no change */
598 args.gid = INVALID_GID; /* no change */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 }
Jeff Layton01ea95e2009-07-09 20:02:49 -0400600 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args,
601 cifs_sb->local_nls,
602 cifs_sb->mnt_cifs_flags &
603 CIFS_MOUNT_MAP_SPECIAL_CHR);
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400604 if (rc)
605 goto mknod_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400607 rc = cifs_get_inode_info_unix(&newinode, full_path,
Steve French5fdae1f2007-06-05 18:30:44 +0000608 inode->i_sb, xid);
Steve Frenchd7245c22005-07-14 18:25:12 -0500609
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400610 if (rc == 0)
611 d_instantiate(direntry, newinode);
612 goto mknod_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 }
614
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400615 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
616 goto mknod_out;
617
618
Joe Perchesf96637b2013-05-04 22:12:25 -0500619 cifs_dbg(FYI, "sfu compat create special file\n");
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400620
621 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
622 if (buf == NULL) {
623 kfree(full_path);
624 rc = -ENOMEM;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400625 free_xid(xid);
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400626 return rc;
627 }
628
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -0500629 if (backup_cred(cifs_sb))
630 create_options |= CREATE_OPEN_BACKUP_INTENT;
631
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400632 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE,
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -0500633 GENERIC_WRITE, create_options,
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400634 &fileHandle, &oplock, buf, cifs_sb->local_nls,
635 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
636 if (rc)
637 goto mknod_out;
638
639 /* BB Do not bother to decode buf since no local inode yet to put
640 * timestamps in, but we can reuse it safely */
641
642 pdev = (struct win_dev *)buf;
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +0400643 io_parms.netfid = fileHandle;
644 io_parms.pid = current->tgid;
645 io_parms.tcon = pTcon;
646 io_parms.offset = 0;
647 io_parms.length = sizeof(struct win_dev);
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400648 if (S_ISCHR(mode)) {
649 memcpy(pdev->type, "IntxCHR", 8);
650 pdev->major =
651 cpu_to_le64(MAJOR(device_number));
652 pdev->minor =
653 cpu_to_le64(MINOR(device_number));
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +0400654 rc = CIFSSMBWrite(xid, &io_parms,
655 &bytes_written, (char *)pdev,
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400656 NULL, 0);
657 } else if (S_ISBLK(mode)) {
658 memcpy(pdev->type, "IntxBLK", 8);
659 pdev->major =
660 cpu_to_le64(MAJOR(device_number));
661 pdev->minor =
662 cpu_to_le64(MINOR(device_number));
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +0400663 rc = CIFSSMBWrite(xid, &io_parms,
664 &bytes_written, (char *)pdev,
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400665 NULL, 0);
666 } /* else if (S_ISFIFO) */
667 CIFSSMBClose(xid, pTcon, fileHandle);
668 d_drop(direntry);
669
670 /* FIXME: add code here to set EAs */
671
672mknod_out:
Steve Frenchd14537f12005-04-28 22:41:05 -0700673 kfree(full_path);
Jeff Layton5d9ac7f2010-08-05 13:58:22 -0400674 kfree(buf);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400675 free_xid(xid);
Jeff Layton7ffec372010-09-29 19:51:11 -0400676 cifs_put_tlink(tlink);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 return rc;
678}
679
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680struct dentry *
Steve French5fdae1f2007-06-05 18:30:44 +0000681cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400682 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683{
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400684 unsigned int xid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 int rc = 0; /* to get around spurious gcc warning, set to zero here */
686 struct cifs_sb_info *cifs_sb;
Jeff Layton7ffec372010-09-29 19:51:11 -0400687 struct tcon_link *tlink;
Steve French96daf2b2011-05-27 04:34:02 +0000688 struct cifs_tcon *pTcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 struct inode *newInode = NULL;
690 char *full_path = NULL;
691
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400692 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693
Joe Perchesf96637b2013-05-04 22:12:25 -0500694 cifs_dbg(FYI, "parent inode = 0x%p name is: %s and dentry = 0x%p\n",
695 parent_dir_inode, direntry->d_name.name, direntry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 /* check whether path exists */
698
699 cifs_sb = CIFS_SB(parent_dir_inode->i_sb);
Jeff Layton7ffec372010-09-29 19:51:11 -0400700 tlink = cifs_sb_tlink(cifs_sb);
701 if (IS_ERR(tlink)) {
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400702 free_xid(xid);
Jeff Layton7ffec372010-09-29 19:51:11 -0400703 return (struct dentry *)tlink;
704 }
705 pTcon = tlink_tcon(tlink);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Miklos Szeredid2c12712012-06-05 15:10:23 +0200707 rc = check_name(direntry);
708 if (rc)
Jeff Layton7ffec372010-09-29 19:51:11 -0400709 goto lookup_out;
Jeff Layton5ddf1e02009-07-05 11:01:02 -0400710
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 /* can not grab the rename sem here since it would
712 deadlock in the cases (beginning of sys_rename itself)
713 in which we already have the sb rename sem */
714 full_path = build_path_from_dentry(direntry);
Steve French5fdae1f2007-06-05 18:30:44 +0000715 if (full_path == NULL) {
Jeff Layton7ffec372010-09-29 19:51:11 -0400716 rc = -ENOMEM;
717 goto lookup_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 }
719
720 if (direntry->d_inode != NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500721 cifs_dbg(FYI, "non-NULL inode in lookup\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -0500723 cifs_dbg(FYI, "NULL inode in lookup\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 }
Joe Perchesf96637b2013-05-04 22:12:25 -0500725 cifs_dbg(FYI, "Full path: %s inode = 0x%p\n",
726 full_path, direntry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
Steve Frencha6ce4932009-04-09 01:14:32 +0000728 if (pTcon->unix_ext) {
Miklos Szeredid2c12712012-06-05 15:10:23 +0200729 rc = cifs_get_inode_info_unix(&newInode, full_path,
730 parent_dir_inode->i_sb, xid);
731 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 rc = cifs_get_inode_info(&newInode, full_path, NULL,
Steve Frencha6ce4932009-04-09 01:14:32 +0000733 parent_dir_inode->i_sb, xid, NULL);
Miklos Szeredid2c12712012-06-05 15:10:23 +0200734 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
736 if ((rc == 0) && (newInode != NULL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 d_add(direntry, newInode);
Steve French5fdae1f2007-06-05 18:30:44 +0000738 /* since paths are not looked up by component - the parent
Steve French3abb9272005-11-28 08:16:13 -0800739 directories are presumed to be good here */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 renew_parental_timestamps(direntry);
741
742 } else if (rc == -ENOENT) {
743 rc = 0;
Steve French3abb9272005-11-28 08:16:13 -0800744 direntry->d_time = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 d_add(direntry, NULL);
Steve French5fdae1f2007-06-05 18:30:44 +0000746 /* if it was once a directory (but how can we tell?) we could do
747 shrink_dcache_parent(direntry); */
Steve Frenched2b9172008-01-20 00:30:29 +0000748 } else if (rc != -EACCES) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500749 cifs_dbg(VFS, "Unexpected lookup error %d\n", rc);
Steve Frenched2b9172008-01-20 00:30:29 +0000750 /* We special case check for Access Denied - since that
751 is a common return code */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 }
753
Jeff Layton2422f672010-06-16 13:40:16 -0400754lookup_out:
Steve Frenchd14537f12005-04-28 22:41:05 -0700755 kfree(full_path);
Jeff Layton7ffec372010-09-29 19:51:11 -0400756 cifs_put_tlink(tlink);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400757 free_xid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 return ERR_PTR(rc);
759}
760
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761static int
Al Viro0b728e12012-06-10 16:03:43 -0400762cifs_d_revalidate(struct dentry *direntry, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763{
Al Viro0b728e12012-06-10 16:03:43 -0400764 if (flags & LOOKUP_RCU)
Nick Piggin34286d62011-01-07 17:49:57 +1100765 return -ECHILD;
766
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 if (direntry->d_inode) {
Jeff Laytondf2cf172010-02-12 07:44:16 -0500768 if (cifs_revalidate_dentry(direntry))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 return 0;
Gerlando Falautoad4778f2011-10-18 10:58:50 +0200770 else {
771 /*
Ian Kent936ad902012-05-02 07:19:09 -0400772 * If the inode wasn't known to be a dfs entry when
773 * the dentry was instantiated, such as when created
774 * via ->readdir(), it needs to be set now since the
775 * attributes will have been updated by
776 * cifs_revalidate_dentry().
Gerlando Falautoad4778f2011-10-18 10:58:50 +0200777 */
Ian Kent936ad902012-05-02 07:19:09 -0400778 if (IS_AUTOMOUNT(direntry->d_inode) &&
779 !(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) {
780 spin_lock(&direntry->d_lock);
781 direntry->d_flags |= DCACHE_NEED_AUTOMOUNT;
782 spin_unlock(&direntry->d_lock);
783 }
784
Nick Piggin262f86a2010-11-11 18:42:16 +1100785 return 1;
Gerlando Falautoad4778f2011-10-18 10:58:50 +0200786 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 }
788
Nick Piggin262f86a2010-11-11 18:42:16 +1100789 /*
790 * This may be nfsd (or something), anyway, we can't see the
791 * intent of this. So, since this can be for creation, drop it.
792 */
Al Viro0b728e12012-06-10 16:03:43 -0400793 if (!flags)
Nick Piggin262f86a2010-11-11 18:42:16 +1100794 return 0;
795
796 /*
797 * Drop the negative dentry, in order to make sure to use the
798 * case sensitive name which is specified by user if this is
799 * for creation.
800 */
Al Viro0b728e12012-06-10 16:03:43 -0400801 if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
Al Viro407938e2011-06-25 21:37:18 -0400802 return 0;
Nick Piggin262f86a2010-11-11 18:42:16 +1100803
804 if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled)
805 return 0;
806
807 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808}
809
810/* static int cifs_d_delete(struct dentry *direntry)
811{
812 int rc = 0;
813
Joe Perchesf96637b2013-05-04 22:12:25 -0500814 cifs_dbg(FYI, "In cifs d_delete, name = %s\n", direntry->d_name.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
816 return rc;
817} */
818
Al Viro4fd03e82009-02-20 05:57:07 +0000819const struct dentry_operations cifs_dentry_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 .d_revalidate = cifs_d_revalidate,
David Howells01c64fe2011-01-14 18:45:47 +0000821 .d_automount = cifs_dfs_d_automount,
Steve French5fdae1f2007-06-05 18:30:44 +0000822/* d_delete: cifs_d_delete, */ /* not needed except for debugging */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823};
Steve Frenchb92327f2005-08-22 20:09:43 -0700824
Nick Pigginb1e6a012011-01-07 17:49:28 +1100825static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode,
826 struct qstr *q)
Steve Frenchb92327f2005-08-22 20:09:43 -0700827{
Nick Pigginb1e6a012011-01-07 17:49:28 +1100828 struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
Steve Frenchb92327f2005-08-22 20:09:43 -0700829 unsigned long hash;
830 int i;
831
832 hash = init_name_hash();
833 for (i = 0; i < q->len; i++)
834 hash = partial_name_hash(nls_tolower(codepage, q->name[i]),
835 hash);
836 q->hash = end_name_hash(hash);
837
838 return 0;
839}
840
Nick Piggin621e1552011-01-07 17:49:27 +1100841static int cifs_ci_compare(const struct dentry *parent,
842 const struct inode *pinode,
843 const struct dentry *dentry, const struct inode *inode,
844 unsigned int len, const char *str, const struct qstr *name)
Steve Frenchb92327f2005-08-22 20:09:43 -0700845{
Nick Piggin621e1552011-01-07 17:49:27 +1100846 struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls;
Steve Frenchb92327f2005-08-22 20:09:43 -0700847
Nick Piggin621e1552011-01-07 17:49:27 +1100848 if ((name->len == len) &&
849 (nls_strnicmp(codepage, name->name, str, len) == 0))
Steve Frenchb92327f2005-08-22 20:09:43 -0700850 return 0;
Steve Frenchb92327f2005-08-22 20:09:43 -0700851 return 1;
852}
853
Al Viro4fd03e82009-02-20 05:57:07 +0000854const struct dentry_operations cifs_ci_dentry_ops = {
Steve Frenchb92327f2005-08-22 20:09:43 -0700855 .d_revalidate = cifs_d_revalidate,
856 .d_hash = cifs_ci_hash,
857 .d_compare = cifs_ci_compare,
David Howells01c64fe2011-01-14 18:45:47 +0000858 .d_automount = cifs_dfs_d_automount,
Steve Frenchb92327f2005-08-22 20:09:43 -0700859};