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/sched.h>
  14 #include <linux/mm.h>
  15 #include <linux/highuid.h>
  16
  17 #include <linux/smb_fs.h>
  18 #include <linux/smb_mount.h>
  19
  20 #include <asm/uaccess.h>
  21
  22 int
  23 smb_ioctl(struct inode *inode, struct file *filp,
  24           unsigned int cmd, unsigned long arg)
  25 {
  26         struct smb_sb_info *server = SMB_SERVER(inode);
  27         struct smb_conn_opt opt;
  28         int result = -EINVAL;
  29
  30         switch (cmd) {
  31         case SMB_IOC_GETMOUNTUID:
  32                 result = put_user(NEW_TO_OLD_UID(server->mnt->mounted_uid),
  33                                   (uid16_t *) arg);
  34                 break;
  35         case SMB_IOC_GETMOUNTUID32:
  36                 result = put_user(server->mnt->mounted_uid, (uid_t *) arg);
  37                 break;
  38
  39         case SMB_IOC_NEWCONN:
  40                 /* require an argument == the mount data, else it is EINVAL */
  41                 if (!arg)
  42                         break;
  43
  44                 result = -EFAULT;
  45                 if (!copy_from_user(&opt, (void *)arg, sizeof(opt)))
  46                         result = smb_newconn(server, &opt);
  47                 break;
  48         default:
  49         }
  50
  51         return result;
  52 }