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Use hotplug support to notify persistent reference holders when a 

net_device is unregistered.
pull/1/head
Michael Brown 2007-01-04 03:09:28 +00:00
parent 0063725d28
commit bdf79ec8dc
2 changed files with 9 additions and 0 deletions
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5
src/include/gpxe/netdevice.h
View File

@ -10,6 +10,7 @@
#include <stdint.h> #include <stdint.h>
#include <gpxe/list.h> #include <gpxe/list.h>
#include <gpxe/tables.h> #include <gpxe/tables.h>
#include <gpxe/hotplug.h>
struct pk_buff; struct pk_buff;
struct net_device; struct net_device;
@ -137,6 +138,10 @@ struct ll_protocol {
struct net_device { struct net_device {
/** List of network devices */ /** List of network devices */
struct list_head list; struct list_head list;
/** List of persistent reference holders */
struct list_head references;
/** Transmit packet /** Transmit packet
* *
* @v netdev Network device * @v netdev Network device

4
src/net/netdevice.c
View File

@ -161,6 +161,7 @@ struct net_device * alloc_netdev ( size_t priv_size ) {
netdev = calloc ( 1, sizeof ( *netdev ) + priv_size ); netdev = calloc ( 1, sizeof ( *netdev ) + priv_size );
if ( netdev ) { if ( netdev ) {
INIT_LIST_HEAD ( &netdev->references );
INIT_LIST_HEAD ( &netdev->rx_queue ); INIT_LIST_HEAD ( &netdev->rx_queue );
netdev->priv = ( ( ( void * ) netdev ) + sizeof ( *netdev ) ); netdev->priv = ( ( ( void * ) netdev ) + sizeof ( *netdev ) );
} }
@ -201,6 +202,9 @@ void unregister_netdev ( struct net_device *netdev ) {
free_pkb ( pkb ); free_pkb ( pkb );
} }
/* Kill off any persistent references to this device */
forget_references ( &netdev->references );
/* Remove from device list */ /* Remove from device list */
list_del ( &netdev->list ); list_del ( &netdev->list );
DBG ( "%s unregistered\n", netdev_name ( netdev ) ); DBG ( "%s unregistered\n", netdev_name ( netdev ) );