ioctl.c

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/*
 *   fs/cifs/ioctl.c
 *
 *   vfs operations that deal with io control
 *
 *   Copyright (C) International Business Machines  Corp., 2005,2007
 *   Author(s): Steve French ([email protected])
 *
 *   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"

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 */
    unsigned int xid;
    struct cifs_sb_info *cifs_sb;
#ifdef CONFIG_CIFS_POSIX
    struct cifsFileInfo *pSMBFile = filep->private_data;
    struct cifs_tcon *tcon;
    __u64   ExtAttrBits = 0;
    __u64   ExtAttrMask = 0;
    __u64   caps;
#endif /* CONFIG_CIFS_POSIX */

    xid = get_xid();

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

    cifs_sb = CIFS_SB(inode->i_sb);

    switch (command) {
#ifdef CONFIG_CIFS_POSIX
        case FS_IOC_GETFLAGS:
            if (pSMBFile == NULL)
                break;
            tcon = tlink_tcon(pSMBFile->tlink);
            caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
            if (CIFS_UNIX_EXTATTR_CAP & caps) {
                rc = CIFSGetExtAttr(xid, tcon,
                            pSMBFile->fid.netfid,
                            &ExtAttrBits, &ExtAttrMask);
                if (rc == 0)
                    rc = put_user(ExtAttrBits &
                        FS_FL_USER_VISIBLE,
                        (int __user *)arg);
            }
            break;

        case FS_IOC_SETFLAGS:
            if (pSMBFile == NULL)
                break;
            tcon = tlink_tcon(pSMBFile->tlink);
            caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
            if (CIFS_UNIX_EXTATTR_CAP & caps) {
                if (get_user(ExtAttrBits, (int __user *)arg)) {
                    rc = -EFAULT;
                    break;
                }
                /*
                 * rc = CIFSGetExtAttr(xid, tcon,
                 *             pSMBFile->fid.netfid,
                 *             extAttrBits,
                 *             &ExtAttrMask);
                 */
            }
            cFYI(1, "set flags not implemented yet");
            break;
#endif /* CONFIG_CIFS_POSIX */
        default:
            cFYI(1, "unsupported ioctl");
            break;
    }

    free_xid(xid);
    return rc;
}