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Commit dc71db34 authored by David Howells's avatar David Howells
Browse files

rxrpc: Fix checks as to whether we should set up a new call 



There's a check in rxrpc_data_ready() that's checking the CLIENT_INITIATED
flag in the packet type field rather than in the packet flags field.

Fix this by creating a pair of helper functions to check whether the packet
is going to the client or to the server and use them generally.

Fixes: 248f219c ("rxrpc: Rewrite the data and ack handling code")
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent 092ffc51

net/rxrpc/ar-internal.h

+10 −0
Original line number Diff line number Diff line
@@ -463,6 +463,16 @@ struct rxrpc_connection { 
	u8			out_clientflag;	/* RXRPC_CLIENT_INITIATED if we are client */

};



static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)

{

	return sp->hdr.flags & RXRPC_CLIENT_INITIATED;

}



static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)

{

	return !rxrpc_to_server(sp);

}



/*

 * Flags in call->flags.

 */

net/rxrpc/conn_object.c

+1 −1
Original line number Diff line number Diff line
@@ -96,7 +96,7 @@ struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *local, 
	k.epoch	= sp->hdr.epoch;

	k.cid	= sp->hdr.cid & RXRPC_CIDMASK;



	if (sp->hdr.flags & RXRPC_CLIENT_INITIATED) {

	if (rxrpc_to_server(sp)) {

		/* We need to look up service connections by the full protocol

		 * parameter set.  We look up the peer first as an intermediate

		 * step and then the connection from the peer's tree.

net/rxrpc/input.c

+4 −8
Original line number Diff line number Diff line
@@ -1177,10 +1177,6 @@ void rxrpc_data_ready(struct sock *udp_sk) 


	trace_rxrpc_rx_packet(sp);



	_net("Rx RxRPC %s ep=%x call=%x:%x",

	     sp->hdr.flags & RXRPC_CLIENT_INITIATED ? "ToServer" : "ToClient",

	     sp->hdr.epoch, sp->hdr.cid, sp->hdr.callNumber);



	if (sp->hdr.type >= RXRPC_N_PACKET_TYPES ||

	    !((RXRPC_SUPPORTED_PACKET_TYPES >> sp->hdr.type) & 1)) {

		_proto("Rx Bad Packet Type %u", sp->hdr.type);
@@ -1189,13 +1185,13 @@ void rxrpc_data_ready(struct sock *udp_sk) 


	switch (sp->hdr.type) {

	case RXRPC_PACKET_TYPE_VERSION:

		if (!(sp->hdr.flags & RXRPC_CLIENT_INITIATED))

		if (rxrpc_to_client(sp))

			goto discard;

		rxrpc_post_packet_to_local(local, skb);

		goto out;



	case RXRPC_PACKET_TYPE_BUSY:

		if (sp->hdr.flags & RXRPC_CLIENT_INITIATED)

		if (rxrpc_to_server(sp))

			goto discard;

		/* Fall through */
@@ -1280,7 +1276,7 @@ void rxrpc_data_ready(struct sock *udp_sk) 
		call = rcu_dereference(chan->call);



		if (sp->hdr.callNumber > chan->call_id) {

			if (!(sp->hdr.flags & RXRPC_CLIENT_INITIATED)) {

			if (rxrpc_to_client(sp)) {

				rcu_read_unlock();

				goto reject_packet;

			}
@@ -1303,7 +1299,7 @@ void rxrpc_data_ready(struct sock *udp_sk) 
	}



	if (!call || atomic_read(&call->usage) == 0) {

		if (!(sp->hdr.type & RXRPC_CLIENT_INITIATED) ||

		if (rxrpc_to_client(sp) ||

		    sp->hdr.callNumber == 0 ||

		    sp->hdr.type != RXRPC_PACKET_TYPE_DATA)

			goto bad_message_unlock;