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authorDavid Howells <dhowells@redhat.com>2016-09-22 00:29:31 +0100
committerDavid Howells <dhowells@redhat.com>2016-09-22 01:23:50 +0100
commit5a924b8951f835b5ff8a3d9f434f3b230fc9905f (patch)
tree078edaea66512bc65011d3fcf1dead7ec8df405a /net/rxrpc/call_event.c
parent2d7a892626b5616a00d27a40fa23d70d5e618269 (diff)
rxrpc: Don't store the rxrpc header in the Tx queue sk_buffs
Don't store the rxrpc protocol header in sk_buffs on the transmit queue, but rather generate it on the fly and pass it to kernel_sendmsg() as a separate iov. This reduces the amount of storage required. Note that the security header is still stored in the sk_buff as it may get encrypted along with the data (and doesn't change with each transmission). Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc/call_event.c')
-rw-r--r--net/rxrpc/call_event.c11
1 files changed, 2 insertions, 9 deletions
diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c
index 7d1b99824ed9..6247ce25eb21 100644
--- a/net/rxrpc/call_event.c
+++ b/net/rxrpc/call_event.c
@@ -139,7 +139,6 @@ void rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason,
*/
static void rxrpc_resend(struct rxrpc_call *call)
{
- struct rxrpc_wire_header *whdr;
struct rxrpc_skb_priv *sp;
struct sk_buff *skb;
rxrpc_seq_t cursor, seq, top;
@@ -201,15 +200,8 @@ static void rxrpc_resend(struct rxrpc_call *call)
skb = call->rxtx_buffer[ix];
rxrpc_get_skb(skb, rxrpc_skb_tx_got);
spin_unlock_bh(&call->lock);
- sp = rxrpc_skb(skb);
-
- /* Each Tx packet needs a new serial number */
- sp->hdr.serial = atomic_inc_return(&call->conn->serial);
- whdr = (struct rxrpc_wire_header *)skb->head;
- whdr->serial = htonl(sp->hdr.serial);
-
- if (rxrpc_send_data_packet(call->conn, skb) < 0) {
+ if (rxrpc_send_data_packet(call, skb) < 0) {
call->resend_at = now + 2;
rxrpc_free_skb(skb, rxrpc_skb_tx_freed);
return;
@@ -217,6 +209,7 @@ static void rxrpc_resend(struct rxrpc_call *call)
if (rxrpc_is_client_call(call))
rxrpc_expose_client_call(call);
+ sp = rxrpc_skb(skb);
sp->resend_at = now + rxrpc_resend_timeout;
rxrpc_free_skb(skb, rxrpc_skb_tx_freed);