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| author | David Howells <dhowells@redhat.com> | 2016-09-22 00:29:32 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2016-09-22 01:23:50 +0100 |
| commit | f07373ead455a396e15a431bc08d8ce1dac6f1cf (patch) | |
| tree | 6322eeac5e068c6e5447b1b18897656d719d90c9 /net/rxrpc/input.c | |
| parent | 5a924b8951f835b5ff8a3d9f434f3b230fc9905f (diff) | |
| download | linux-f07373ead455a396e15a431bc08d8ce1dac6f1cf.tar.bz2 | |
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.c | 14 |
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: |