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Make open() and close() an official part of the netdevice API.

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Call netdevice's poll() and transmit() methods only when device is open.
This commit is contained in:
Michael Brown
2007-01-04 04:20:08 +00:00
parent d4894f0127
commit 0c03bb5a9a
6 changed files with 138 additions and 19 deletions
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68
src/net/netdevice.c
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@@ -54,6 +54,12 @@ static LIST_HEAD ( net_devices );
int netdev_tx ( struct net_device *netdev, struct pk_buff *pkb ) {
DBG ( "%s transmitting %p+%zx\n", netdev_name ( netdev ),
pkb->data, pkb_len ( pkb ) );
if ( ! ( netdev->state & NETDEV_OPEN ) ) {
free_pkb ( pkb );
return -ENETUNREACH;
}
return netdev->transmit ( netdev, pkb );
}
@@ -100,7 +106,7 @@ int net_tx ( struct pk_buff *pkb, struct net_device *netdev,
* @ret rc Return status code
*/
int net_rx ( struct pk_buff *pkb, struct net_device *netdev,
uint16_t net_proto, const void *ll_source ) {
uint16_t net_proto, const void *ll_source ) {
struct net_protocol *net_protocol;
/* Hand off to network-layer protocol, if any */
@@ -125,7 +131,10 @@ int net_rx ( struct pk_buff *pkb, struct net_device *netdev,
* packets will be added to the RX packet queue via netdev_rx().
*/
int netdev_poll ( struct net_device *netdev ) {
netdev->poll ( netdev );
if ( netdev->state & NETDEV_OPEN )
netdev->poll ( netdev );
return ( ! list_empty ( &netdev->rx_queue ) );
}
@@ -186,15 +195,46 @@ int register_netdev ( struct net_device *netdev ) {
}
/**
* Unregister network device
* Open network device
*
* @v netdev Network device
*
* Removes the network device from the list of network devices.
* @ret rc Return status code
*/
void unregister_netdev ( struct net_device *netdev ) {
int netdev_open ( struct net_device *netdev ) {
int rc;
/* Do nothing if device is already open */
if ( netdev->state & NETDEV_OPEN )
return 0;
DBG ( "%s opening\n", netdev_name ( netdev ) );
/* Open the device */
if ( ( rc = netdev->open ( netdev ) ) != 0 )
return rc;
/* Mark as opened */
netdev->state |= NETDEV_OPEN;
return 0;
}
/**
* Close network device
*
* @v netdev Network device
*/
void netdev_close ( struct net_device *netdev ) {
struct pk_buff *pkb;
/* Do nothing if device is already closed */
if ( ! ( netdev->state & NETDEV_OPEN ) )
return;
DBG ( "%s closing\n", netdev_name ( netdev ) );
/* Close the device */
netdev->close ( netdev );
/* Discard any packets in the RX queue */
while ( ( pkb = netdev_rx_dequeue ( netdev ) ) ) {
DBG ( "%s discarding %p+%zx\n", netdev_name ( netdev ),
@@ -202,6 +242,22 @@ void unregister_netdev ( struct net_device *netdev ) {
free_pkb ( pkb );
}
/* Mark as closed */
netdev->state &= ~NETDEV_OPEN;
}
/**
* Unregister network device
*
* @v netdev Network device
*
* Removes the network device from the list of network devices.
*/
void unregister_netdev ( struct net_device *netdev ) {
/* Ensure device is closed */
netdev_close ( netdev );
/* Kill off any persistent references to this device */
forget_references ( &netdev->references );