blob: a7a47bb36bf30888ea87bd62592ed732bba05d25 [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
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"
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 */
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 */
65
66
67 return cifs_ntfy_flags;
68}
69
70int 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;
80
Steve French4ca9c192005-10-10 19:52:13 -070081
82 if(experimEnabled == 0)
83 return 0;
84
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 xid = GetXid();
86 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
87 pTcon = cifs_sb->tcon;
88
89 down(&file->f_dentry->d_sb->s_vfs_rename_sem);
Steve French7f573562005-08-30 11:32:14 -070090 full_path = build_path_from_dentry(file->f_dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 up(&file->f_dentry->d_sb->s_vfs_rename_sem);
92
93 if(full_path == NULL) {
94 rc = -ENOMEM;
95 } else {
96 cERROR(1,("cifs dir notify on file %s with arg 0x%lx",full_path,arg)); /* BB removeme BB */
97 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
98 GENERIC_READ | SYNCHRONIZE, 0 /* create options */,
Steve French737b7582005-04-28 22:41:06 -070099 &netfid, &oplock,NULL, cifs_sb->local_nls,
100 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 /* BB fixme - add this handle to a notify handle list */
102 if(rc) {
103 cERROR(1,("Could not open directory for notify")); /* BB remove BB */
104 } else {
105 filter = convert_to_cifs_notify_flags(arg);
106 if(filter != 0) {
Steve French167a2512005-08-24 20:03:11 -0700107 rc = CIFSSMBNotify(xid, pTcon,
108 0 /* no subdirs */, netfid,
109 filter, file, arg & DN_MULTISHOT,
110 cifs_sb->local_nls);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 } else {
112 rc = -EINVAL;
113 }
114 /* BB add code to close file eventually (at unmount
115 it would close automatically but may be a way
116 to do it easily when inode freed or when
117 notify info is cleared/changed */
Steve French167a2512005-08-24 20:03:11 -0700118 cFYI(1,("notify rc %d",rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 }
120 }
121
122 FreeXid(xid);
123 return rc;
124}