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/*
* ioctl.c
*
* Copyright (C) 1995, 1996 by Volker Lendecke
*
*/
#include <asm/segment.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ncp_fs.h>
#include <linux/ioctl.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/ncp.h>
int
ncp_ioctl (struct inode * inode, struct file * filp,
unsigned int cmd, unsigned long arg)
{
int result;
struct ncp_ioctl_request request;
struct ncp_fs_info info;
struct ncp_server *server = NCP_SERVER(inode);
/*
* Binary compatible with 1.3.XX releases.
* Take this out in 2.1.0 development series.
* <mec@duracef.shout.net> 12 Mar 1996
*/
switch(cmd) {
case _IOR('n', 1, unsigned char *):
cmd = NCP_IOC_NCPREQUEST;
break;
case _IOR('u', 1, uid_t):
cmd = NCP_IOC_GETMOUNTUID;
break;
case _IO('l', 1):
cmd = NCP_IOC_CONN_LOGGED_IN;
break;
case _IOWR('i', 1, unsigned char *):
cmd = NCP_IOC_GET_FS_INFO;
break;
}
switch(cmd) {
case NCP_IOC_NCPREQUEST:
if ( (permission(inode, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid))
{
return -EACCES;
}
if ((result = verify_area(VERIFY_READ, (char *)arg,
sizeof(request))) != 0)
{
return result;
}
memcpy_fromfs(&request, (struct ncp_ioctl_request *)arg,
sizeof(request));
if ( (request.function > 255)
|| (request.size >
NCP_PACKET_SIZE - sizeof(struct ncp_request_header)))
{
return -EINVAL;
}
if ((result = verify_area(VERIFY_WRITE, (char *)request.data,
NCP_PACKET_SIZE)) != 0)
{
return result;
}
ncp_lock_server(server);
/* FIXME: We hack around in the server's structures
here to be able to use ncp_request */
server->has_subfunction = 0;
server->current_size = request.size;
memcpy_fromfs(server->packet, request.data, request.size);
ncp_request(server, request.function);
DPRINTK("ncp_ioctl: copy %d bytes\n",
server->reply_size);
memcpy_tofs(request.data, server->packet, server->reply_size);
ncp_unlock_server(server);
return server->reply_size;
case NCP_IOC_CONN_LOGGED_IN:
if ( (permission(inode, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid))
{
return -EACCES;
}
return ncp_conn_logged_in(server);
case NCP_IOC_GET_FS_INFO:
if ( (permission(inode, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid))
{
return -EACCES;
}
if ((result = verify_area(VERIFY_WRITE, (char *)arg,
sizeof(info))) != 0)
{
return result;
}
memcpy_fromfs(&info, (struct ncp_fs_info *)arg,
sizeof(info));
if (info.version != NCP_GET_FS_INFO_VERSION)
{
DPRINTK("info.version invalid: %d\n", info.version);
return -EINVAL;
}
info.addr = server->m.serv_addr;
info.mounted_uid = server->m.mounted_uid;
info.connection = server->connection;
info.buffer_size = server->buffer_size;
info.volume_number = NCP_ISTRUCT(inode)->volNumber;
info.directory_id = NCP_ISTRUCT(inode)->DosDirNum;
memcpy_tofs((struct ncp_fs_info *)arg, &info, sizeof(info));
return 0;
case NCP_IOC_GETMOUNTUID:
if ( (permission(inode, MAY_READ) != 0)
&& (current->uid != server->m.mounted_uid))
{
return -EACCES;
}
if ((result = verify_area(VERIFY_WRITE, (uid_t*) arg,
sizeof(uid_t))) != 0)
{
return result;
}
put_fs_word(server->m.mounted_uid, (uid_t*) arg);
return 0;
default:
return -EINVAL;
}
return -EINVAL;
}
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