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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/fcntl.c | |
3 | * | |
4 | * vfs operations that deal with the file control API | |
5fdae1f6 | 5 | * |
1da177e4 LT |
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 | ||
32 | static __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 */ | |
ad7a2926 | 38 | if (fcntl_notify_flags & DN_ACCESS) |
1da177e4 | 39 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS; |
5fdae1f6 | 40 | if (fcntl_notify_flags & DN_MODIFY) { |
1da177e4 LT |
41 | /* What does this mean on directories? */ |
42 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE | | |
43 | FILE_NOTIFY_CHANGE_SIZE; | |
44 | } | |
5fdae1f6 SF |
45 | if (fcntl_notify_flags & DN_CREATE) { |
46 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION | | |
1da177e4 LT |
47 | FILE_NOTIFY_CHANGE_LAST_WRITE; |
48 | } | |
ad7a2926 | 49 | if (fcntl_notify_flags & DN_DELETE) |
1da177e4 | 50 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE; |
5fdae1f6 | 51 | if (fcntl_notify_flags & DN_RENAME) { |
1da177e4 | 52 | /* BB review this - checking various server behaviors */ |
5fdae1f6 | 53 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME | |
1da177e4 LT |
54 | FILE_NOTIFY_CHANGE_FILE_NAME; |
55 | } | |
5fdae1f6 SF |
56 | if (fcntl_notify_flags & DN_ATTRIB) { |
57 | cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY | | |
1da177e4 LT |
58 | FILE_NOTIFY_CHANGE_ATTRIBUTES; |
59 | } | |
5fdae1f6 | 60 | /* if (fcntl_notify_flags & DN_MULTISHOT) { |
1da177e4 LT |
61 | cifs_ntfy_flags |= ; |
62 | } */ /* BB fixme - not sure how to handle this with CIFS yet */ | |
63 | ||
1da177e4 LT |
64 | return cifs_ntfy_flags; |
65 | } | |
66 | ||
fb8c4b14 | 67 | int cifs_dir_notify(struct file *file, unsigned long arg) |
1da177e4 LT |
68 | { |
69 | int xid; | |
70 | int rc = -EINVAL; | |
4b18f2a9 | 71 | int oplock = 0; |
1da177e4 LT |
72 | struct cifs_sb_info *cifs_sb; |
73 | struct cifsTconInfo *pTcon; | |
74 | char *full_path = NULL; | |
75 | __u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES; | |
76 | __u16 netfid; | |
77 | ||
5fdae1f6 | 78 | if (experimEnabled == 0) |
4ca9c190 SF |
79 | return 0; |
80 | ||
1da177e4 | 81 | xid = GetXid(); |
e6a00296 | 82 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
83 | pTcon = cifs_sb->tcon; |
84 | ||
e6a00296 | 85 | full_path = build_path_from_dentry(file->f_path.dentry); |
1da177e4 | 86 | |
5fdae1f6 | 87 | if (full_path == NULL) { |
1da177e4 LT |
88 | rc = -ENOMEM; |
89 | } else { | |
5fdae1f6 SF |
90 | cFYI(1, ("dir notify on file %s Arg 0x%lx", full_path, arg)); |
91 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, | |
1da177e4 | 92 | GENERIC_READ | SYNCHRONIZE, 0 /* create options */, |
5fdae1f6 | 93 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
737b758c | 94 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 95 | /* BB fixme - add this handle to a notify handle list */ |
5fdae1f6 SF |
96 | if (rc) { |
97 | cFYI(1, ("Could not open directory for notify")); | |
1da177e4 LT |
98 | } else { |
99 | filter = convert_to_cifs_notify_flags(arg); | |
5fdae1f6 SF |
100 | if (filter != 0) { |
101 | rc = CIFSSMBNotify(xid, pTcon, | |
167a251a SF |
102 | 0 /* no subdirs */, netfid, |
103 | filter, file, arg & DN_MULTISHOT, | |
104 | cifs_sb->local_nls); | |
1da177e4 LT |
105 | } else { |
106 | rc = -EINVAL; | |
107 | } | |
108 | /* BB add code to close file eventually (at unmount | |
109 | it would close automatically but may be a way | |
110 | to do it easily when inode freed or when | |
111 | notify info is cleared/changed */ | |
5fdae1f6 | 112 | cFYI(1, ("notify rc %d", rc)); |
1da177e4 LT |
113 | } |
114 | } | |
5fdae1f6 | 115 | |
1da177e4 LT |
116 | FreeXid(xid); |
117 | return rc; | |
118 | } |