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
31 __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags)
32 {
33 __u32 cifs_ntfy_flags = 0;
34
35 /* No way on Linux VFS to ask to monitor xattr
36 changes (and no stream support either */
37 if(fcntl_notify_flags & DN_ACCESS) {
38 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS;
39 }
40 if(fcntl_notify_flags & DN_MODIFY) {
41 /* What does this mean on directories? */
42 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE |
43 FILE_NOTIFY_CHANGE_SIZE;
44 }
45 if(fcntl_notify_flags & DN_CREATE) {
46 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION |
47 FILE_NOTIFY_CHANGE_LAST_WRITE;
48 }
49 if(fcntl_notify_flags & DN_DELETE) {
50 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE;
51 }
52 if(fcntl_notify_flags & DN_RENAME) {
53 /* BB review this - checking various server behaviors */
54 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME |
55 FILE_NOTIFY_CHANGE_FILE_NAME;
56 }
57 if(fcntl_notify_flags & DN_ATTRIB) {
58 cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY |
59 FILE_NOTIFY_CHANGE_ATTRIBUTES;
60 }
61 /* if(fcntl_notify_flags & DN_MULTISHOT) {
62 cifs_ntfy_flags |= ;
63 } */ /* BB fixme - not sure how to handle this with CIFS yet */
64
65
66 return cifs_ntfy_flags;
67 }
68
69 int 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
80 xid = GetXid();
81 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
82 pTcon = cifs_sb->tcon;
83
84 down(&file->f_dentry->d_sb->s_vfs_rename_sem);
85 full_path = build_path_from_dentry(file->f_dentry);
86 up(&file->f_dentry->d_sb->s_vfs_rename_sem);
87
88 if(full_path == NULL) {
89 rc = -ENOMEM;
90 } else {
91 cERROR(1,("cifs dir notify on file %s with arg 0x%lx",full_path,arg)); /* BB removeme BB */
92 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
93 GENERIC_READ | SYNCHRONIZE, 0 /* create options */,
94 &netfid, &oplock,NULL, cifs_sb->local_nls);
95 /* BB fixme - add this handle to a notify handle list */
96 if(rc) {
97 cERROR(1,("Could not open directory for notify")); /* BB remove BB */
98 } else {
99 filter = convert_to_cifs_notify_flags(arg);
100 if(filter != 0) {
101 rc = CIFSSMBNotify(xid, pTcon, 0 /* no subdirs */, netfid,
102 filter, cifs_sb->local_nls);
103 } else {
104 rc = -EINVAL;
105 }
106 /* BB add code to close file eventually (at unmount
107 it would close automatically but may be a way
108 to do it easily when inode freed or when
109 notify info is cleared/changed */
110 cERROR(1,("notify rc %d",rc));
111 }
112 }
113
114 FreeXid(xid);
115 return rc;
116 }
117
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