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[NETDEV] Add notion of link state

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Add ability for network devices to flag link up/down state to the
networking core.

Autobooting code will now wait for link-up before attempting DHCP.

IPoIB reflects the Infiniband link state as the network device link state
(which is not strictly correct; we also need a succesful IPoIB IPv4
broadcast group join), but is probably more informative.
This commit is contained in:
Michael Brown
2008-04-22 17:40:50 +01:00
parent d72bf13b78
commit 1ba959c6b3
13 changed files with 110 additions and 2 deletions
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20
src/drivers/net/ipoib.c
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@@ -471,6 +471,12 @@ static int ipoib_transmit ( struct net_device *netdev,
}
iob_pull ( iobuf, ( sizeof ( *ipoib_pshdr ) ) );
/* Attempting transmission while link is down will put the
* queue pair into an error state, so don't try it.
*/
if ( ! ibdev->link_up )
return -ENETUNREACH;
/* Construct address vector */
memset ( &av, 0, sizeof ( av ) );
av.qkey = IB_GLOBAL_QKEY;
@@ -790,6 +796,10 @@ static int ipoib_join_broadcast_group ( struct ipoib_device *ipoib ) {
return rc;
}
/* We will set link up on the network device when we receive
* the broadcast join response.
*/
return 0;
}
@@ -907,16 +917,24 @@ static struct net_device_operations ipoib_operations = {
*/
static void ipoib_set_ib_params ( struct ipoib_device *ipoib ) {
struct ib_device *ibdev = ipoib->ibdev;
struct net_device *netdev = ipoib->netdev;
struct ipoib_mac *mac;
/* Calculate GID portion of MAC address based on port GID */
mac = ( ( struct ipoib_mac * ) ipoib->netdev->ll_addr );
mac = ( ( struct ipoib_mac * ) netdev->ll_addr );
memcpy ( &mac->gid, &ibdev->port_gid, sizeof ( mac->gid ) );
/* Calculate broadcast GID based on partition key */
memcpy ( &ipoib->broadcast_gid, &ipv4_broadcast_gid,
sizeof ( ipoib->broadcast_gid ) );
ipoib->broadcast_gid.u.words[2] = htons ( ibdev->pkey );
/* Set net device link state to reflect Infiniband link state */
if ( ibdev->link_up ) {
netdev_link_up ( netdev );
} else {
netdev_link_down ( netdev );
}
}
/**