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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/ioctl.c
3 *
4 * vfs operations that deal with io control
5 *
Steve Frenchfb8c4b12007-07-10 01:16:18 +00006 * Copyright (C) International Business Machines Corp., 2005,2007
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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 */
Steve Frenchf654bac2005-04-28 22:41:04 -070023
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "cifspdu.h"
26#include "cifsglob.h"
27#include "cifsproto.h"
28#include "cifs_debug.h"
Steve Frenchc67593a2005-04-28 22:41:04 -070029#include "cifsfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
Steve Frenchf28ac912005-04-28 22:41:07 -070031#define CIFS_IOC_CHECKUMOUNT _IO(0xCF, 2)
32
Steve Frenchf9ddcca2008-05-15 05:51:55 +000033long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -070034{
Steve Frenchf9ddcca2008-05-15 05:51:55 +000035 struct inode *inode = filep->f_dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 int rc = -ENOTTY; /* strange error - but the precedent */
Steve Frenchc81156d2005-04-28 22:41:07 -070037 int xid;
38 struct cifs_sb_info *cifs_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#ifdef CONFIG_CIFS_POSIX
Steve Frenchf654bac2005-04-28 22:41:04 -070040 __u64 ExtAttrBits = 0;
41 __u64 ExtAttrMask = 0;
Steve Frenchf28ac912005-04-28 22:41:07 -070042 __u64 caps;
Steve Frenchf654bac2005-04-28 22:41:04 -070043 struct cifsTconInfo *tcon;
Joe Perchesc21dfb62010-07-12 13:50:14 -070044 struct cifsFileInfo *pSMBFile = filep->private_data;
Steve Frenchc81156d2005-04-28 22:41:07 -070045#endif /* CONFIG_CIFS_POSIX */
Steve Frenchf654bac2005-04-28 22:41:04 -070046
47 xid = GetXid();
48
Joe Perchesb6b38f72010-04-21 03:50:45 +000049 cFYI(1, "ioctl file %p cmd %u arg %lu", filep, command, arg);
Steve Frenchf28ac912005-04-28 22:41:07 -070050
Steve Frenchf654bac2005-04-28 22:41:04 -070051 cifs_sb = CIFS_SB(inode->i_sb);
Steve Frenchf654bac2005-04-28 22:41:04 -070052
Steve Frenchc81156d2005-04-28 22:41:07 -070053#ifdef CONFIG_CIFS_POSIX
54 tcon = cifs_sb->tcon;
Steve French5fdae1f2007-06-05 18:30:44 +000055 if (tcon)
Steve Frenchf654bac2005-04-28 22:41:04 -070056 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
57 else {
58 rc = -EIO;
Steve Frenchc81156d2005-04-28 22:41:07 -070059 FreeXid(xid);
60 return -EIO;
Steve Frenchf654bac2005-04-28 22:41:04 -070061 }
Steve Frenchc81156d2005-04-28 22:41:07 -070062#endif /* CONFIG_CIFS_POSIX */
Steve Frenchf654bac2005-04-28 22:41:04 -070063
Steve French5fdae1f2007-06-05 18:30:44 +000064 switch (command) {
Steve Frenchf28ac912005-04-28 22:41:07 -070065 case CIFS_IOC_CHECKUMOUNT:
Joe Perchesb6b38f72010-04-21 03:50:45 +000066 cFYI(1, "User unmount attempted");
David Howellsa001e5b2008-11-14 10:38:47 +110067 if (cifs_sb->mnt_uid == current_uid())
Steve Frenchf28ac912005-04-28 22:41:07 -070068 rc = 0;
69 else {
70 rc = -EACCES;
Joe Perchesb6b38f72010-04-21 03:50:45 +000071 cFYI(1, "uids do not match");
Steve Frenchf28ac912005-04-28 22:41:07 -070072 }
73 break;
74#ifdef CONFIG_CIFS_POSIX
David Howells36695672006-08-29 19:06:16 +010075 case FS_IOC_GETFLAGS:
Steve French5fdae1f2007-06-05 18:30:44 +000076 if (CIFS_UNIX_EXTATTR_CAP & caps) {
Steve Frenchf28ac912005-04-28 22:41:07 -070077 if (pSMBFile == NULL)
Steve Frenchc81156d2005-04-28 22:41:07 -070078 break;
Steve Frenchf654bac2005-04-28 22:41:04 -070079 rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid,
80 &ExtAttrBits, &ExtAttrMask);
Steve French5fdae1f2007-06-05 18:30:44 +000081 if (rc == 0)
Steve Frenchf654bac2005-04-28 22:41:04 -070082 rc = put_user(ExtAttrBits &
David Howells36695672006-08-29 19:06:16 +010083 FS_FL_USER_VISIBLE,
Steve Frenchf654bac2005-04-28 22:41:04 -070084 (int __user *)arg);
85 }
86 break;
87
David Howells36695672006-08-29 19:06:16 +010088 case FS_IOC_SETFLAGS:
Steve French5fdae1f2007-06-05 18:30:44 +000089 if (CIFS_UNIX_EXTATTR_CAP & caps) {
90 if (get_user(ExtAttrBits, (int __user *)arg)) {
Steve Frenchf654bac2005-04-28 22:41:04 -070091 rc = -EFAULT;
Steve Frenchc81156d2005-04-28 22:41:07 -070092 break;
Steve Frenchf654bac2005-04-28 22:41:04 -070093 }
Steve Frenchf28ac912005-04-28 22:41:07 -070094 if (pSMBFile == NULL)
Steve Frenchc81156d2005-04-28 22:41:07 -070095 break;
Steve Frenchf28ac912005-04-28 22:41:07 -070096 /* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid,
Steve Frenchf654bac2005-04-28 22:41:04 -070097 extAttrBits, &ExtAttrMask);*/
Steve Frenchf654bac2005-04-28 22:41:04 -070098 }
Joe Perchesb6b38f72010-04-21 03:50:45 +000099 cFYI(1, "set flags not implemented yet");
Steve Frenchf654bac2005-04-28 22:41:04 -0700100 break;
Steve Frenchf28ac912005-04-28 22:41:07 -0700101#endif /* CONFIG_CIFS_POSIX */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 default:
Joe Perchesb6b38f72010-04-21 03:50:45 +0000103 cFYI(1, "unsupported ioctl");
Steve Frenchf28ac912005-04-28 22:41:07 -0700104 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 }
Steve Frenchf654bac2005-04-28 22:41:04 -0700106
Steve Frenchf654bac2005-04-28 22:41:04 -0700107 FreeXid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 return rc;
Steve French5fdae1f2007-06-05 18:30:44 +0000109}