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[aoe] Start retry timer before potential temporary transmission failure 

The retry timer needs to be running as soon as we know that we are
trying to transmit a command.  If transmission fails because of a
temporary error condition, then the timer will allow us to retry the
transmission later.
pull/1/head
Michael Brown 2008-11-08 04:36:42 +00:00
parent ed196a3ed2
commit 43aa69d7b3
1 changed files with 11 additions and 4 deletions
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15
src/net/aoe.c
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@ -94,6 +94,13 @@ static int aoe_send_command ( struct aoe_session *aoe ) {
return -ENETUNREACH; return -ENETUNREACH;
} }
/* If we are transmitting anything that requires a response,
* start the retransmission timer. Do this before attempting
* to allocate the I/O buffer, in case allocation itself
* fails.
*/
start_timer ( &aoe->timer );
/* Calculate count and data_out_len for this subcommand */ /* Calculate count and data_out_len for this subcommand */
count = command->cb.count.native; count = command->cb.count.native;
if ( count > AOE_MAX_COUNT ) if ( count > AOE_MAX_COUNT )
@ -101,8 +108,8 @@ static int aoe_send_command ( struct aoe_session *aoe ) {
data_out_len = ( command->data_out ? ( count * ATA_SECTOR_SIZE ) : 0 ); data_out_len = ( command->data_out ? ( count * ATA_SECTOR_SIZE ) : 0 );
/* Create outgoing I/O buffer */ /* Create outgoing I/O buffer */
iobuf = alloc_iob ( ETH_HLEN + sizeof ( *aoehdr ) + sizeof ( *aoecmd ) + iobuf = alloc_iob ( ETH_HLEN + sizeof ( *aoehdr ) +
data_out_len ); sizeof ( *aoecmd ) + data_out_len );
if ( ! iobuf ) if ( ! iobuf )
return -ENOMEM; return -ENOMEM;
iob_reserve ( iobuf, ETH_HLEN ); iob_reserve ( iobuf, ETH_HLEN );
@ -133,7 +140,6 @@ static int aoe_send_command ( struct aoe_session *aoe ) {
aoe->command_offset, data_out_len ); aoe->command_offset, data_out_len );
/* Send packet */ /* Send packet */
start_timer ( &aoe->timer );
return net_tx ( iobuf, aoe->netdev, &aoe_protocol, aoe->target ); return net_tx ( iobuf, aoe->netdev, &aoe_protocol, aoe->target );
} }
@ -231,7 +237,8 @@ static int aoe_rx_response ( struct aoe_session *aoe, struct aoehdr *aoehdr,
* @ret rc Return status code * @ret rc Return status code
* *
*/ */
static int aoe_rx ( struct io_buffer *iobuf, struct net_device *netdev __unused, static int aoe_rx ( struct io_buffer *iobuf,
struct net_device *netdev __unused,
const void *ll_source ) { const void *ll_source ) {
struct aoehdr *aoehdr = iobuf->data; struct aoehdr *aoehdr = iobuf->data;
unsigned int len = iob_len ( iobuf ); unsigned int len = iob_len ( iobuf );