fs/cifs/ioctl.c

   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 long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
  32 {
  33         struct inode *inode = file_inode(filep);
  34         int rc = -ENOTTY; /* strange error - but the precedent */
  35         unsigned int xid;
  36         struct cifs_sb_info *cifs_sb;
  37 #ifdef CONFIG_CIFS_POSIX
  38         struct cifsFileInfo *pSMBFile = filep->private_data;
  39         struct cifs_tcon *tcon;
  40         __u64   ExtAttrBits = 0;
  41         __u64   ExtAttrMask = 0;
  42         __u64   caps;
  43 #endif /* CONFIG_CIFS_POSIX */
  44
  45         xid = get_xid();
  46
  47         cFYI(1, "ioctl file %p  cmd %u  arg %lu", filep, command, arg);
  48
  49         cifs_sb = CIFS_SB(inode->i_sb);
  50
  51         switch (command) {
  52 #ifdef CONFIG_CIFS_POSIX
  53                 case FS_IOC_GETFLAGS:
  54                         if (pSMBFile == NULL)
  55                                 break;
  56                         tcon = tlink_tcon(pSMBFile->tlink);
  57                         caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
  58                         if (CIFS_UNIX_EXTATTR_CAP & caps) {
  59                                 rc = CIFSGetExtAttr(xid, tcon,
  60                                                     pSMBFile->fid.netfid,
  61                                                     &ExtAttrBits, &ExtAttrMask);
  62                                 if (rc == 0)
  63                                         rc = put_user(ExtAttrBits &
  64                                                 FS_FL_USER_VISIBLE,
  65                                                 (int __user *)arg);
  66                         }
  67                         break;
  68
  69                 case FS_IOC_SETFLAGS:
  70                         if (pSMBFile == NULL)
  71                                 break;
  72                         tcon = tlink_tcon(pSMBFile->tlink);
  73                         caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
  74                         if (CIFS_UNIX_EXTATTR_CAP & caps) {
  75                                 if (get_user(ExtAttrBits, (int __user *)arg)) {
  76                                         rc = -EFAULT;
  77                                         break;
  78                                 }
  79                                 /*
  80                                  * rc = CIFSGetExtAttr(xid, tcon,
  81                                  *                     pSMBFile->fid.netfid,
  82                                  *                     extAttrBits,
  83                                  *                     &ExtAttrMask);
  84                                  */
  85                         }
  86                         cFYI(1, "set flags not implemented yet");
  87                         break;
  88 #endif /* CONFIG_CIFS_POSIX */
  89                 default:
  90                         cFYI(1, "unsupported ioctl");
  91                         break;
  92         }
  93
  94         free_xid(xid);
  95         return rc;
  96 }