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 struct cifsFileInfo *pSMBFile = filep->private_data;
41 struct cifs_tcon *tcon;
42 __u64 ExtAttrBits = 0;
43 __u64 ExtAttrMask = 0;
44 __u64 caps;
45 #endif /* CONFIG_CIFS_POSIX */
46
47 xid = GetXid();
48
49 cFYI(1, "ioctl file %p cmd %u arg %lu", filep, command, arg);
50
51 cifs_sb = CIFS_SB(inode->i_sb);
52
53 switch (command) {
54 case CIFS_IOC_CHECKUMOUNT:
55 cFYI(1, "User unmount attempted");
56 if (cifs_sb->mnt_uid == current_uid())
57 rc = 0;
58 else {
59 rc = -EACCES;
60 cFYI(1, "uids do not match");
61 }
62 break;
63 #ifdef CONFIG_CIFS_POSIX
64 case FS_IOC_GETFLAGS:
65 if (pSMBFile == NULL)
66 break;
67 tcon = tlink_tcon(pSMBFile->tlink);
68 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
69 if (CIFS_UNIX_EXTATTR_CAP & caps) {
70 rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid,
71 &ExtAttrBits, &ExtAttrMask);
72 if (rc == 0)
73 rc = put_user(ExtAttrBits &
74 FS_FL_USER_VISIBLE,
75 (int __user *)arg);
76 }
77 break;
78
79 case FS_IOC_SETFLAGS:
80 if (pSMBFile == NULL)
81 break;
82 tcon = tlink_tcon(pSMBFile->tlink);
83 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
84 if (CIFS_UNIX_EXTATTR_CAP & caps) {
85 if (get_user(ExtAttrBits, (int __user *)arg)) {
86 rc = -EFAULT;
87 break;
88 }
89 /* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid,
90 extAttrBits, &ExtAttrMask);*/
91 }
92 cFYI(1, "set flags not implemented yet");
93 break;
94 #endif /* CONFIG_CIFS_POSIX */
95 default:
96 cFYI(1, "unsupported ioctl");
97 break;
98 }
99
100 FreeXid(xid);
101 return rc;
102 }
103