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
   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 <linux/ext2_fs.h>
  26 #include "cifspdu.h"
  27 #include "cifsglob.h"
  28 #include "cifsproto.h"
  29 #include "cifs_debug.h"
  30 #include "cifsfs.h"
  31
  32 #define CIFS_IOC_CHECKUMOUNT _IO(0xCF, 2)
  33
  34 int cifs_ioctl (struct inode * inode, struct file * filep,
  35                 unsigned int command, unsigned long arg)
  36 {
  37         int rc = -ENOTTY; /* strange error - but the precedent */
  38 #ifdef CONFIG_CIFS_POSIX
  39         __u64   ExtAttrBits = 0;
  40         __u64   ExtAttrMask = 0;
  41 #endif /* CONFIG_CIFS_POSIX */
  42         __u64   caps;
  43         int xid;
  44         struct cifs_sb_info *cifs_sb;
  45         struct cifsTconInfo *tcon;
  46         struct cifsFileInfo *pSMBFile =
  47                 (struct cifsFileInfo *)filep->private_data;
  48
  49         xid = GetXid();
  50
  51         cFYI(1,("ioctl file %p  cmd %u  arg %lu",filep,command,arg));
  52
  53         cifs_sb = CIFS_SB(inode->i_sb);
  54         tcon = cifs_sb->tcon;
  55
  56         if(tcon)
  57                 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
  58         else {
  59                 rc = -EIO;
  60                 goto cifs_ioctl_out;
  61         }
  62
  63         switch(command) {
  64                 case CIFS_IOC_CHECKUMOUNT:
  65                         cFYI(1,("User unmount attempted"));
  66                         /* BB FIXME - add missing code here FIXME */
  67                         if(cifs_sb->mnt_uid == current->uid)
  68                                 rc = 0;
  69                         else {
  70                                 rc = -EACCES;
  71                                 cFYI(1,("uids do not match"));
  72                         }
  73                         break;
  74 #ifdef CONFIG_CIFS_POSIX
  75                 case EXT2_IOC_GETFLAGS:
  76                         if(CIFS_UNIX_EXTATTR_CAP & caps) {
  77                                 if (pSMBFile == NULL)
  78                                         goto cifs_ioctl_out;
  79                                 rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid,
  80                                         &ExtAttrBits, &ExtAttrMask);
  81                                 if(rc == 0)
  82                                         rc = put_user(ExtAttrBits &
  83                                                 EXT2_FL_USER_VISIBLE,
  84                                                 (int __user *)arg);
  85                         }
  86                         break;
  87
  88                 case EXT2_IOC_SETFLAGS:
  89                         if(CIFS_UNIX_EXTATTR_CAP & caps) {
  90                                 if(get_user(ExtAttrBits,(int __user *)arg)) {
  91                                         rc = -EFAULT;
  92                                         goto cifs_ioctl_out;
  93                                 }
  94                                 if (pSMBFile == NULL)
  95                                         goto cifs_ioctl_out;
  96                                 /* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid,
  97                                         extAttrBits, &ExtAttrMask);*/
  98
  99                         }
 100                         cFYI(1,("set flags not implemented yet"));
 101                         break;
 102 #endif /* CONFIG_CIFS_POSIX */
 103                 default:
 104                         cFYI(1,("unsupported ioctl"));
 105                         break;
 106         }
 107
 108 cifs_ioctl_out:
 109         FreeXid(xid);
 110         return rc;
 111 }