fs/smbfs/ioctl.c

   1 /*
   2  *  ioctl.c
   3  *
   4  *  Copyright (C) 1995, 1996 by Volker Lendecke
   5  *  Copyright (C) 1997 by Volker Lendecke
   6  *
   7  *  Please add a note about your changes to smbfs in the ChangeLog file.
   8  */
   9
  10 #include <linux/errno.h>
  11 #include <linux/fs.h>
  12 #include <linux/ioctl.h>
  13 #include <linux/time.h>
  14 #include <linux/mm.h>
  15 #include <linux/highuid.h>
  16 #include <linux/smp_lock.h>
  17 #include <linux/net.h>
  18
  19 #include <linux/smb_fs.h>
  20 #include <linux/smb_mount.h>
  21
  22 #include <asm/uaccess.h>
  23
  24 #include "proto.h"
  25
  26 long
  27 smb_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
  28 {
  29         struct smb_sb_info *server = server_from_inode(filp->f_path.dentry->d_inode);
  30         struct smb_conn_opt opt;
  31         int result = -EINVAL;
  32
  33         lock_kernel();
  34         switch (cmd) {
  35                 uid16_t uid16;
  36                 uid_t uid32;
  37         case SMB_IOC_GETMOUNTUID:
  38                 SET_UID(uid16, server->mnt->mounted_uid);
  39                 result = put_user(uid16, (uid16_t __user *) arg);
  40                 break;
  41         case SMB_IOC_GETMOUNTUID32:
  42                 SET_UID(uid32, server->mnt->mounted_uid);
  43                 result = put_user(uid32, (uid_t __user *) arg);
  44                 break;
  45
  46         case SMB_IOC_NEWCONN:
  47                 /* arg is smb_conn_opt, or NULL if no connection was made */
  48                 if (!arg) {
  49                         result = 0;
  50                         smb_lock_server(server);
  51                         server->state = CONN_RETRIED;
  52                         printk(KERN_ERR "Connection attempt failed!  [%d]\n",
  53                                server->conn_error);
  54                         smbiod_flush(server);
  55                         smb_unlock_server(server);
  56                         break;
  57                 }
  58
  59                 result = -EFAULT;
  60                 if (!copy_from_user(&opt, (void __user *)arg, sizeof(opt)))
  61                         result = smb_newconn(server, &opt);
  62                 break;
  63         default:
  64                 break;
  65         }
  66         unlock_kernel();
  67
  68         return result;
  69 }