2006-09-29 12:58:46 +04:00
/*
2007-10-16 12:27:31 +04:00
* Copyright ( C ) 2002 - 2007 Jeff Dike ( jdike @ { addtoit , linux . intel } . com )
2005-04-17 02:20:36 +04:00
* Licensed under the GPL
*/
# ifndef __UM_NET_USER_H__
# define __UM_NET_USER_H__
# define ETH_ADDR_LEN (6)
# define ETH_HEADER_ETHERTAP (16)
# define ETH_HEADER_OTHER (14)
# define ETH_MAX_PACKET (1500)
# define UML_NET_VERSION (4)
struct net_user_info {
uml: network interface hotplug error handling
This fixes a number of problems associated with network interface hotplug.
The userspace initialization function can fail in some cases, but the
failure was never passed back to eth_configure, which proceeded with the
configuration. This results in a zombie device that is present, but can't
work. This is fixed by allowing the initialization routines to return an
error, which is checked, and the configuration aborted on failure.
eth_configure failed to check for many failures. Even when it did check,
it didn't undo whatever initializations has already happened, so a present,
but partially initialized and non-working device could result. It now
checks everything that can fail, and bails out, undoing whatever had been
done.
The return value of eth_configure was always ignored, so it is now just
void.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-07 01:51:04 +04:00
int ( * init ) ( void * , void * ) ;
2005-04-17 02:20:36 +04:00
int ( * open ) ( void * ) ;
void ( * close ) ( int , void * ) ;
void ( * remove ) ( void * ) ;
void ( * add_address ) ( unsigned char * , unsigned char * , void * ) ;
void ( * delete_address ) ( unsigned char * , unsigned char * , void * ) ;
int max_packet ;
2007-10-16 12:27:31 +04:00
int mtu ;
2005-04-17 02:20:36 +04:00
} ;
extern void ether_user_init ( void * data , void * dev ) ;
2006-09-29 12:58:46 +04:00
extern void iter_addresses ( void * d , void ( * cb ) ( unsigned char * ,
unsigned char * , void * ) ,
2005-04-17 02:20:36 +04:00
void * arg ) ;
extern void * get_output_buffer ( int * len_out ) ;
extern void free_output_buffer ( void * buffer ) ;
extern int tap_open_common ( void * dev , char * gate_addr ) ;
2005-06-09 02:48:01 +04:00
extern void tap_check_ips ( char * gate_addr , unsigned char * eth_addr ) ;
2005-04-17 02:20:36 +04:00
extern void read_output ( int fd , char * output_out , int len ) ;
extern int net_read ( int fd , void * buf , int len ) ;
extern int net_recvfrom ( int fd , void * buf , int len ) ;
extern int net_write ( int fd , void * buf , int len ) ;
extern int net_send ( int fd , void * buf , int len ) ;
extern int net_sendto ( int fd , void * buf , int len , void * to , int sock_len ) ;
extern void open_addr ( unsigned char * addr , unsigned char * netmask , void * arg ) ;
extern void close_addr ( unsigned char * addr , unsigned char * netmask , void * arg ) ;
extern char * split_if_spec ( char * str , . . . ) ;
extern int dev_netmask ( void * d , void * m ) ;
2006-09-29 12:58:46 +04:00
# endif