ia64/linux-2.6.18-xen.hg

view fs/cifs/fcntl.c @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
1 /*
2 * fs/cifs/fcntl.c
3 *
4 * vfs operations that deal with the file control API
5 *
6 * 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"
32 static __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags)
33 {
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;
40 }
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;
45 }
46 if(fcntl_notify_flags & DN_CREATE) {
47 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION |
48 FILE_NOTIFY_CHANGE_LAST_WRITE;
49 }
50 if(fcntl_notify_flags & DN_DELETE) {
51 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE;
52 }
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;
57 }
58 if(fcntl_notify_flags & DN_ATTRIB) {
59 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY |
60 FILE_NOTIFY_CHANGE_ATTRIBUTES;
61 }
62 /* if(fcntl_notify_flags & DN_MULTISHOT) {
63 cifs_ntfy_flags |= ;
64 } */ /* BB fixme - not sure how to handle this with CIFS yet */
67 return cifs_ntfy_flags;
68 }
70 int cifs_dir_notify(struct file * file, unsigned long arg)
71 {
72 int xid;
73 int rc = -EINVAL;
74 int oplock = FALSE;
75 struct cifs_sb_info *cifs_sb;
76 struct cifsTconInfo *pTcon;
77 char *full_path = NULL;
78 __u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES;
79 __u16 netfid;
82 if(experimEnabled == 0)
83 return 0;
85 xid = GetXid();
86 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
87 pTcon = cifs_sb->tcon;
89 full_path = build_path_from_dentry(file->f_dentry);
91 if(full_path == NULL) {
92 rc = -ENOMEM;
93 } else {
94 cFYI(1,("dir notify on file %s Arg 0x%lx",full_path,arg));
95 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
96 GENERIC_READ | SYNCHRONIZE, 0 /* create options */,
97 &netfid, &oplock,NULL, cifs_sb->local_nls,
98 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
99 /* BB fixme - add this handle to a notify handle list */
100 if(rc) {
101 cFYI(1,("Could not open directory for notify"));
102 } else {
103 filter = convert_to_cifs_notify_flags(arg);
104 if(filter != 0) {
105 rc = CIFSSMBNotify(xid, pTcon,
106 0 /* no subdirs */, netfid,
107 filter, file, arg & DN_MULTISHOT,
108 cifs_sb->local_nls);
109 } else {
110 rc = -EINVAL;
111 }
112 /* BB add code to close file eventually (at unmount
113 it would close automatically but may be a way
114 to do it easily when inode freed or when
115 notify info is cleared/changed */
116 cFYI(1,("notify rc %d",rc));
117 }
118 }
120 FreeXid(xid);
121 return rc;
122 }