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rxrpc: Add re-sent Tx annotation

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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>
This commit is contained in:
David Howells
2016-09-22 00:29:32 +01:00
parent 5a924b8951
commit f07373ead4
3 changed files with 32 additions and 12 deletions
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2
net/rxrpc/ar-internal.h
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@@ -505,6 +505,8 @@ struct rxrpc_call {
#define RXRPC_TX_ANNO_UNACK 1
#define RXRPC_TX_ANNO_NAK 2
#define RXRPC_TX_ANNO_RETRANS 3
#define RXRPC_TX_ANNO_MASK 0x03
#define RXRPC_TX_ANNO_RESENT 0x04
#define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */
#define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */
#define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */