blob: 8e375bb4b37994b9a71c0d31df09962fd10f8082 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/fcntl.c
3 *
4 * vfs operations that deal with the file control API
Steve French5fdae1f2007-06-05 18:30:44 +00005 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * Copyright (C) International Business Machines Corp., 2003,2004
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/fcntl.h>
26#include "cifsglob.h"
27#include "cifsproto.h"
28#include "cifs_unicode.h"
29#include "cifs_debug.h"
30#include "cifsfs.h"
31
32static __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags)
33{
34 __u32 cifs_ntfy_flags = 0;
35
36 /* No way on Linux VFS to ask to monitor xattr
37 changes (and no stream support either */
Steve French5fdae1f2007-06-05 18:30:44 +000038 if (fcntl_notify_flags & DN_ACCESS) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS;
40 }
Steve French5fdae1f2007-06-05 18:30:44 +000041 if (fcntl_notify_flags & DN_MODIFY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 /* What does this mean on directories? */
43 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE |
44 FILE_NOTIFY_CHANGE_SIZE;
45 }
Steve French5fdae1f2007-06-05 18:30:44 +000046 if (fcntl_notify_flags & DN_CREATE) {
47 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION |
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 FILE_NOTIFY_CHANGE_LAST_WRITE;
49 }
Steve French5fdae1f2007-06-05 18:30:44 +000050 if (fcntl_notify_flags & DN_DELETE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE;
52 }
Steve French5fdae1f2007-06-05 18:30:44 +000053 if (fcntl_notify_flags & DN_RENAME) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 /* BB review this - checking various server behaviors */
Steve French5fdae1f2007-06-05 18:30:44 +000055 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME |
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 FILE_NOTIFY_CHANGE_FILE_NAME;
57 }
Steve French5fdae1f2007-06-05 18:30:44 +000058 if (fcntl_notify_flags & DN_ATTRIB) {
59 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY |
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 FILE_NOTIFY_CHANGE_ATTRIBUTES;
61 }
Steve French5fdae1f2007-06-05 18:30:44 +000062/* if (fcntl_notify_flags & DN_MULTISHOT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 cifs_ntfy_flags |= ;
64 } */ /* BB fixme - not sure how to handle this with CIFS yet */
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 return cifs_ntfy_flags;
67}
68
69int cifs_dir_notify(struct file * file, unsigned long arg)
70{
71 int xid;
72 int rc = -EINVAL;
73 int oplock = FALSE;
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;
78 __u16 netfid;
79
Steve French5fdae1f2007-06-05 18:30:44 +000080 if (experimEnabled == 0)
Steve French4ca9c192005-10-10 19:52:13 -070081 return 0;
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 xid = GetXid();
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080084 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 pTcon = cifs_sb->tcon;
86
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080087 full_path = build_path_from_dentry(file->f_path.dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
Steve French5fdae1f2007-06-05 18:30:44 +000089 if (full_path == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 rc = -ENOMEM;
91 } else {
Steve French5fdae1f2007-06-05 18:30:44 +000092 cFYI(1, ("dir notify on file %s Arg 0x%lx", full_path, arg));
93 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 GENERIC_READ | SYNCHRONIZE, 0 /* create options */,
Steve French5fdae1f2007-06-05 18:30:44 +000095 &netfid, &oplock, NULL, cifs_sb->local_nls,
Steve French737b7582005-04-28 22:41:06 -070096 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 /* BB fixme - add this handle to a notify handle list */
Steve French5fdae1f2007-06-05 18:30:44 +000098 if (rc) {
99 cFYI(1, ("Could not open directory for notify"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 } else {
101 filter = convert_to_cifs_notify_flags(arg);
Steve French5fdae1f2007-06-05 18:30:44 +0000102 if (filter != 0) {
103 rc = CIFSSMBNotify(xid, pTcon,
Steve French167a2512005-08-24 20:03:11 -0700104 0 /* no subdirs */, netfid,
105 filter, file, arg & DN_MULTISHOT,
106 cifs_sb->local_nls);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 } else {
108 rc = -EINVAL;
109 }
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 */
Steve French5fdae1f2007-06-05 18:30:44 +0000114 cFYI(1, ("notify rc %d", rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 }
116 }
Steve French5fdae1f2007-06-05 18:30:44 +0000117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 FreeXid(xid);
119 return rc;
120}