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Updated retry timer mechanism to incorporate smoothed RTT estimation.

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AoE now uses the retry timer mechanism.
This commit is contained in:
Michael Brown
2006-06-01 14:33:52 +00:00
parent 50415b3aca
commit 48fb6c6dc2
3 changed files with 102 additions and 60 deletions
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29
src/net/aoe.c
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@@ -115,9 +115,27 @@ static int aoe_send_command ( struct aoe_session *aoe ) {
aoe->command_offset, data_out_len );
/* Send packet */
start_timer ( &aoe->timer );
return net_transmit_via ( pkb, aoe->netdev );
}
/**
* Handle AoE retry timer expiry
*
* @v timer AoE retry timer
* @v fail Failure indicator
*/
static void aoe_timer_expired ( struct retry_timer *timer, int fail ) {
struct aoe_session *aoe =
container_of ( timer, struct aoe_session, timer );
if ( fail ) {
aoe_done ( aoe, -ETIMEDOUT );
} else {
aoe_send_command ( aoe );
}
}
/**
* Handle AoE response
*
@@ -134,10 +152,18 @@ static int aoe_rx_response ( struct aoe_session *aoe, struct aoehdr *aoehdr,
unsigned int data_len;
/* Sanity check */
if ( len < ( sizeof ( *aoehdr ) + sizeof ( *aoecmd ) ) )
if ( len < ( sizeof ( *aoehdr ) + sizeof ( *aoecmd ) ) ) {
/* Ignore packet; allow timer to trigger retransmit */
return -EINVAL;
}
rx_data_len = ( len - sizeof ( *aoehdr ) - sizeof ( *aoecmd ) );
/* Stop retry timer. After this point, every code path must
* either terminate the AoE operation via aoe_done(), or
* transmit a new packet.
*/
stop_timer ( &aoe->timer );
/* Check for fatal errors */
if ( aoehdr->ver_flags & AOE_FL_ERROR ) {
aoe_done ( aoe, -EIO );
@@ -268,6 +294,7 @@ NET_PROTOCOL ( aoe_protocol );
*/
void aoe_open ( struct aoe_session *aoe ) {
memset ( aoe->target, 0xff, sizeof ( aoe->target ) );
aoe->timer.expired = aoe_timer_expired;
list_add ( &aoe->list, &aoe_sessions );
}