root/fs/cifs/ioctl.c

DEFINITIONS

1. cifs_ioctl

/*
 *   fs/cifs/ioctl.c
 *
 *   vfs operations that deal with io control
 *
 *   Copyright (C) International Business Machines  Corp., 2005,2007
 *   Author(s): Steve French (sfrench@us.ibm.com)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/fs.h>
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifsfs.h"

#define CIFS_IOC_CHECKUMOUNT _IO(0xCF, 2)

long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
{
        struct inode *inode = filep->f_dentry->d_inode;
        int rc = -ENOTTY; /* strange error - but the precedent */
        int xid;
        struct cifs_sb_info *cifs_sb;
#ifdef CONFIG_CIFS_POSIX
        __u64   ExtAttrBits = 0;
        __u64   ExtAttrMask = 0;
        __u64   caps;
        struct cifsTconInfo *tcon;
        struct cifsFileInfo *pSMBFile =
                (struct cifsFileInfo *)filep->private_data;
#endif /* CONFIG_CIFS_POSIX */

        xid = GetXid();

        cFYI(1, ("ioctl file %p  cmd %u  arg %lu", filep, command, arg));

        cifs_sb = CIFS_SB(inode->i_sb);

#ifdef CONFIG_CIFS_POSIX
        tcon = cifs_sb->tcon;
        if (tcon)
                caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
        else {
                rc = -EIO;
                FreeXid(xid);
                return -EIO;
        }
#endif /* CONFIG_CIFS_POSIX */

        switch (command) {
                case CIFS_IOC_CHECKUMOUNT:
                        cFYI(1, ("User unmount attempted"));
                        if (cifs_sb->mnt_uid == current->uid)
                                rc = 0;
                        else {
                                rc = -EACCES;
                                cFYI(1, ("uids do not match"));
                        }
                        break;
#ifdef CONFIG_CIFS_POSIX
                case FS_IOC_GETFLAGS:
                        if (CIFS_UNIX_EXTATTR_CAP & caps) {
                                if (pSMBFile == NULL)
                                        break;
                                rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid,
                                        &ExtAttrBits, &ExtAttrMask);
                                if (rc == 0)
                                        rc = put_user(ExtAttrBits &
                                                FS_FL_USER_VISIBLE,
                                                (int __user *)arg);
                        }
                        break;

                case FS_IOC_SETFLAGS:
                        if (CIFS_UNIX_EXTATTR_CAP & caps) {
                                if (get_user(ExtAttrBits, (int __user *)arg)) {
                                        rc = -EFAULT;
                                        break;
                                }
                                if (pSMBFile == NULL)
                                        break;
                                /* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid,
                                        extAttrBits, &ExtAttrMask);*/
                        }
                        cFYI(1, ("set flags not implemented yet"));
                        break;
#endif /* CONFIG_CIFS_POSIX */
                default:
                        cFYI(1, ("unsupported ioctl"));
                        break;
        }

        FreeXid(xid);
        return rc;
}