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rxrpc: Move peer lookup from call-accept to new-incoming-conn

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Move the lookup of a peer from a call that's being accepted into the
function that creates a new incoming connection.  This will allow us to
avoid incrementing the peer's usage count in some cases in future.

Note that I haven't bother to integrate rxrpc_get_addr_from_skb() with
rxrpc_extract_addr_from_skb() as I'm going to delete the former in the very
near future.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2016-06-29 14:40:39 +01:00
parent 7877a4a4bd
commit d991b4a32f
4 changed files with 51 additions and 26 deletions
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31
net/rxrpc/call_accept.c
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@@ -75,7 +75,6 @@ static int rxrpc_accept_incoming_call(struct rxrpc_local *local,
{
struct rxrpc_connection *conn;
struct rxrpc_skb_priv *sp, *nsp;
struct rxrpc_peer *peer;
struct rxrpc_call *call;
struct sk_buff *notification;
int ret;
@@ -94,15 +93,7 @@ static int rxrpc_accept_incoming_call(struct rxrpc_local *local,
rxrpc_new_skb(notification);
notification->mark = RXRPC_SKB_MARK_NEW_CALL;
peer = rxrpc_lookup_peer(local, srx, GFP_NOIO);
if (!peer) {
_debug("no peer");
ret = -EBUSY;
goto error;
}
conn = rxrpc_incoming_connection(local, peer, skb);
rxrpc_put_peer(peer);
conn = rxrpc_incoming_connection(local, srx, skb);
if (IS_ERR(conn)) {
_debug("no conn");
ret = PTR_ERR(conn);
@@ -226,20 +217,8 @@ void rxrpc_accept_incoming_calls(struct rxrpc_local *local)
whdr._rsvd = 0;
whdr.serviceId = htons(sp->hdr.serviceId);
/* determine the remote address */
memset(&srx, 0, sizeof(srx));
srx.srx_family = AF_RXRPC;
srx.transport.family = local->srx.transport.family;
srx.transport_type = local->srx.transport_type;
switch (srx.transport.family) {
case AF_INET:
srx.transport_len = sizeof(struct sockaddr_in);
srx.transport.sin.sin_port = udp_hdr(skb)->source;
srx.transport.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
break;
default:
goto busy;
}
if (rxrpc_extract_addr_from_skb(&srx, skb) < 0)
goto drop;
/* get the socket providing the service */
read_lock_bh(&local->services_lock);
@@ -285,6 +264,10 @@ busy:
rxrpc_free_skb(skb);
return;
drop:
rxrpc_free_skb(skb);
return;
invalid_service:
skb->priority = RX_INVALID_OPERATION;
rxrpc_reject_packet(local, skb);