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         int xid;
  39         struct cifs_sb_info *cifs_sb;
  40 #ifdef CONFIG_CIFS_POSIX
  41         __u64   ExtAttrBits = 0;
  42         __u64   ExtAttrMask = 0;
  43         __u64   caps;
  44         struct cifsTconInfo *tcon;
  45         struct cifsFileInfo *pSMBFile =
  46                 (struct cifsFileInfo *)filep->private_data;
  47 #endif /* CONFIG_CIFS_POSIX */
  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
  55 #ifdef CONFIG_CIFS_POSIX
  56         tcon = cifs_sb->tcon;
  57         if(tcon)
  58                 caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
  59         else {
  60                 rc = -EIO;
  61                 FreeXid(xid);
  62                 return -EIO;
  63         }
  64 #endif /* CONFIG_CIFS_POSIX */
  65
  66         switch(command) {
  67                 case CIFS_IOC_CHECKUMOUNT:
  68                         cFYI(1,("User unmount attempted"));
  69                         if(cifs_sb->mnt_uid == current->uid)
  70                                 rc = 0;
  71                         else {
  72                                 rc = -EACCES;
  73                                 cFYI(1,("uids do not match"));
  74                         }
  75                         break;
  76 #ifdef CONFIG_CIFS_POSIX
  77                 case EXT2_IOC_GETFLAGS:
  78                         if(CIFS_UNIX_EXTATTR_CAP & caps) {
  79                                 if (pSMBFile == NULL)
  80                                         break;
  81                                 rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid,
  82                                         &ExtAttrBits, &ExtAttrMask);
  83                                 if(rc == 0)
  84                                         rc = put_user(ExtAttrBits &
  85                                                 EXT2_FL_USER_VISIBLE,
  86                                                 (int __user *)arg);
  87                         }
  88                         break;
  89
  90                 case EXT2_IOC_SETFLAGS:
  91                         if(CIFS_UNIX_EXTATTR_CAP & caps) {
  92                                 if(get_user(ExtAttrBits,(int __user *)arg)) {
  93                                         rc = -EFAULT;
  94                                         break;
  95                                 }
  96                                 if (pSMBFile == NULL)
  97                                         break;
  98                                 /* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid,
  99                                         extAttrBits, &ExtAttrMask);*/
 100
 101                         }
 102                         cFYI(1,("set flags not implemented yet"));
 103                         break;
 104 #endif /* CONFIG_CIFS_POSIX */
 105                 default:
 106                         cFYI(1,("unsupported ioctl"));
 107                         break;
 108         }
 109
 110         FreeXid(xid);
 111         return rc;
 112 }