1 /*
2 * fs/cifs/ioctl.c
3 *
4 * vfs operations that deal with io control
5 *
6 * Copyright (C) International Business Machines Corp., 2005,2007
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
24 #include <linux/fs.h>
25 #include "cifspdu.h"
26 #include "cifsglob.h"
27 #include "cifsproto.h"
28 #include "cifs_debug.h"
29 #include "cifsfs.h"
30
31 #define CIFS_IOC_CHECKUMOUNT _IO(0xCF, 2)
32
cifs_ioctl(struct file * filep,unsigned int command,unsigned long arg)33 long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
34 {
35 struct inode *inode = filep->f_dentry->d_inode;
36 int rc = -ENOTTY; /* strange error - but the precedent */
37 int xid;
38 struct cifs_sb_info *cifs_sb;
39 #ifdef CONFIG_CIFS_POSIX
40 __u64 ExtAttrBits = 0;
41 __u64 ExtAttrMask = 0;
42 __u64 caps;
43 struct cifsTconInfo *tcon;
44 struct cifsFileInfo *pSMBFile =
45 (struct cifsFileInfo *)filep->private_data;
46 #endif /* CONFIG_CIFS_POSIX */
47
48 xid = GetXid();
49
50 cFYI(1, ("ioctl file %p cmd %u arg %lu", filep, command, arg));
51
52 cifs_sb = CIFS_SB(inode->i_sb);
53
54 #ifdef CONFIG_CIFS_POSIX
55 tcon = cifs_sb->tcon;
56 if (tcon)
57 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
58 else {
59 rc = -EIO;
60 FreeXid(xid);
61 return -EIO;
62 }
63 #endif /* CONFIG_CIFS_POSIX */
64
65 switch (command) {
66 case CIFS_IOC_CHECKUMOUNT:
67 cFYI(1, ("User unmount attempted"));
68 if (cifs_sb->mnt_uid == current_uid())
69 rc = 0;
70 else {
71 rc = -EACCES;
72 cFYI(1, ("uids do not match"));
73 }
74 break;
75 #ifdef CONFIG_CIFS_POSIX
76 case FS_IOC_GETFLAGS:
77 if (CIFS_UNIX_EXTATTR_CAP & caps) {
78 if (pSMBFile == NULL)
79 break;
80 rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid,
81 &ExtAttrBits, &ExtAttrMask);
82 if (rc == 0)
83 rc = put_user(ExtAttrBits &
84 FS_FL_USER_VISIBLE,
85 (int __user *)arg);
86 }
87 break;
88
89 case FS_IOC_SETFLAGS:
90 if (CIFS_UNIX_EXTATTR_CAP & caps) {
91 if (get_user(ExtAttrBits, (int __user *)arg)) {
92 rc = -EFAULT;
93 break;
94 }
95 if (pSMBFile == NULL)
96 break;
97 /* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid,
98 extAttrBits, &ExtAttrMask);*/
99 }
100 cFYI(1, ("set flags not implemented yet"));
101 break;
102 #endif /* CONFIG_CIFS_POSIX */
103 default:
104 cFYI(1, ("unsupported ioctl"));
105 break;
106 }
107
108 FreeXid(xid);
109 return rc;
110 }
111