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authorDavid Howells <dhowells@redhat.com>2016-09-22 00:29:32 +0100
committerDavid Howells <dhowells@redhat.com>2016-09-22 01:23:50 +0100
commitf07373ead455a396e15a431bc08d8ce1dac6f1cf (patch)
tree6322eeac5e068c6e5447b1b18897656d719d90c9 /net/rxrpc/input.c
parent5a924b8951f835b5ff8a3d9f434f3b230fc9905f (diff)
rxrpc: Add re-sent Tx annotation
Add a Tx-phase annotation for packet buffers to indicate that a buffer has already been retransmitted. This will be used by future congestion management. Re-retransmissions of a packet don't affect the congestion window managment in the same way as initial retransmissions. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc/input.c')
-rw-r--r--net/rxrpc/input.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 7ac1edf3aac7..aa261df9fc9e 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -388,17 +388,25 @@ static void rxrpc_input_soft_acks(struct rxrpc_call *call, u8 *acks,
{
bool resend = false;
int ix;
+ u8 annotation, anno_type;
for (; nr_acks > 0; nr_acks--, seq++) {
ix = seq & RXRPC_RXTX_BUFF_MASK;
+ annotation = call->rxtx_annotations[ix];
+ anno_type = annotation & RXRPC_TX_ANNO_MASK;
+ annotation &= ~RXRPC_TX_ANNO_MASK;
switch (*acks++) {
case RXRPC_ACK_TYPE_ACK:
- call->rxtx_annotations[ix] = RXRPC_TX_ANNO_ACK;
+ if (anno_type == RXRPC_TX_ANNO_ACK)
+ continue;
+ call->rxtx_annotations[ix] =
+ RXRPC_TX_ANNO_ACK | annotation;
break;
case RXRPC_ACK_TYPE_NACK:
- if (call->rxtx_annotations[ix] == RXRPC_TX_ANNO_NAK)
+ if (anno_type == RXRPC_TX_ANNO_NAK)
continue;
- call->rxtx_annotations[ix] = RXRPC_TX_ANNO_NAK;
+ call->rxtx_annotations[ix] =
+ RXRPC_TX_ANNO_NAK | annotation;
resend = true;
break;
default: