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| author | Michael Brown | 2007-01-09 22:47:01 +0100 |
|---|---|---|
| committer | Michael Brown | 2007-01-09 22:47:01 +0100 |
| commit | c65fae2475ca652ef7948f286881b0c06bce861b (patch) | |
| tree | 5588ec4b947ecc79201ee613d1cd0a0a7ca6d1d8 /src/include | |
| parent | Autopadding was sometimes overwriting the struct list_head at the end (diff) | |
| download | ipxe-c65fae2475ca652ef7948f286881b0c06bce861b.tar.gz ipxe-c65fae2475ca652ef7948f286881b0c06bce861b.tar.xz ipxe-c65fae2475ca652ef7948f286881b0c06bce861b.zip | |
Add RX quotas to the net device poll() method. This avoids the problem
of alloc_pkb() exhaustion when e.g. an iSCSI-booted DOS session is left
idle for a long time at the C:\ prompt and builds up a huge packet
backlog.
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/gpxe/netdevice.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/include/gpxe/netdevice.h b/src/include/gpxe/netdevice.h index ad1f90130..bc0827284 100644 --- a/src/include/gpxe/netdevice.h +++ b/src/include/gpxe/netdevice.h @@ -181,15 +181,16 @@ struct net_device { /** Poll for received packet * * @v netdev Network device + * @v rx_quota Maximum number of packets to receive * * This method should cause the hardware to check for received * packets. Any received packets should be delivered via - * netdev_rx(). + * netdev_rx(), up to a maximum of @c rx_quota packets. * * This method is guaranteed to be called only when the device * is open. */ - void ( * poll ) ( struct net_device *netdev ); + void ( * poll ) ( struct net_device *netdev, unsigned int rx_quota ); /** Link-layer protocol */ struct ll_protocol *ll_protocol; @@ -238,7 +239,7 @@ extern int netdev_tx ( struct net_device *netdev, struct pk_buff *pkb ); void netdev_tx_complete ( struct net_device *netdev, struct pk_buff *pkb ); void netdev_tx_complete_next ( struct net_device *netdev ); extern void netdev_rx ( struct net_device *netdev, struct pk_buff *pkb ); -extern int netdev_poll ( struct net_device *netdev ); +extern int netdev_poll ( struct net_device *netdev, unsigned int rx_quota ); extern struct pk_buff * netdev_rx_dequeue ( struct net_device *netdev ); extern struct net_device * alloc_netdev ( size_t priv_size ); extern int register_netdev ( struct net_device *netdev ); |