4 * vfs operations that deal with the file control API
6 * Copyright (C) International Business Machines Corp., 2003,2004
7 * Author(s): Steve French (sfrench@us.ibm.com)
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.
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.
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
24 #include <linux/stat.h>
25 #include <linux/fcntl.h>
27 #include "cifsproto.h"
28 #include "cifs_unicode.h"
29 #include "cifs_debug.h"
32 static __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags)
34 __u32 cifs_ntfy_flags = 0;
36 /* No way on Linux VFS to ask to monitor xattr
37 changes (and no stream support either */
38 if (fcntl_notify_flags & DN_ACCESS) {
39 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS;
41 if (fcntl_notify_flags & DN_MODIFY) {
42 /* What does this mean on directories? */
43 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE |
44 FILE_NOTIFY_CHANGE_SIZE;
46 if (fcntl_notify_flags & DN_CREATE) {
47 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION |
48 FILE_NOTIFY_CHANGE_LAST_WRITE;
50 if (fcntl_notify_flags & DN_DELETE) {
51 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE;
53 if (fcntl_notify_flags & DN_RENAME) {
54 /* BB review this - checking various server behaviors */
55 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME |
56 FILE_NOTIFY_CHANGE_FILE_NAME;
58 if (fcntl_notify_flags & DN_ATTRIB) {
59 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY |
60 FILE_NOTIFY_CHANGE_ATTRIBUTES;
62 /* if (fcntl_notify_flags & DN_MULTISHOT) {
64 } */ /* BB fixme - not sure how to handle this with CIFS yet */
66 return cifs_ntfy_flags;
69 int cifs_dir_notify(struct file *file, unsigned long arg)
74 struct cifs_sb_info *cifs_sb;
75 struct cifsTconInfo *pTcon;
76 char *full_path = NULL;
77 __u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES;
80 if (experimEnabled == 0)
84 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
85 pTcon = cifs_sb->tcon;
87 full_path = build_path_from_dentry(file->f_path.dentry);
89 if (full_path == NULL) {
92 cFYI(1, ("dir notify on file %s Arg 0x%lx", full_path, arg));
93 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
94 GENERIC_READ | SYNCHRONIZE, 0 /* create options */,
95 &netfid, &oplock, NULL, cifs_sb->local_nls,
96 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
97 /* BB fixme - add this handle to a notify handle list */
99 cFYI(1, ("Could not open directory for notify"));
101 filter = convert_to_cifs_notify_flags(arg);
103 rc = CIFSSMBNotify(xid, pTcon,
104 0 /* no subdirs */, netfid,
105 filter, file, arg & DN_MULTISHOT,
110 /* BB add code to close file eventually (at unmount
111 it would close automatically but may be a way
112 to do it easily when inode freed or when
113 notify info is cleared/changed */
114 cFYI(1, ("notify rc %d", rc));