Commit 68d6d1ae authored by David Howells's avatar David Howells
Browse files

rxrpc: Separate the connection's protocol service ID from the lookup ID 



Keep the rxrpc_connection struct's idea of the service ID that is exposed
in the protocol separate from the service ID that's used as a lookup key.

This allows the protocol service ID on a client connection to get upgraded
without making the connection unfindable for other client calls that also
would like to use the upgraded connection.

The connection's actual service ID is then returned through recvmsg() by
way of msg_name.

Whilst we're at it, we get rid of the last_service_id field from each
channel.  The service ID is per-connection, not per-call and an entire
connection is upgraded in one go.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent aae1a2ce

net/rxrpc/af_rxrpc.c

+2 −3
Original line number Diff line number Diff line
@@ -131,9 +131,8 @@ static int rxrpc_validate_address(struct rxrpc_sock *rx, 
static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)

{

	struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr;

	struct sock *sk = sock->sk;

	struct rxrpc_local *local;

	struct rxrpc_sock *rx = rxrpc_sk(sk);

	struct rxrpc_sock *rx = rxrpc_sk(sock->sk);

	u16 service_id = srx->srx_service;

	int ret;
@@ -152,7 +151,7 @@ static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len) 


	memcpy(&rx->srx, srx, sizeof(rx->srx));



	local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx);

	local = rxrpc_lookup_local(sock_net(&rx->sk), &rx->srx);

	if (IS_ERR(local)) {

		ret = PTR_ERR(local);

		goto error_unlock;

net/rxrpc/ar-internal.h

+1 −1
Original line number Diff line number Diff line
@@ -386,7 +386,6 @@ struct rxrpc_connection { 
		u32			call_counter;	/* Call ID counter */

		u32			last_call;	/* ID of last call */

		u8			last_type;	/* Type of last packet */

		u16			last_service_id;

		union {

			u32		last_seq;

			u32		last_abort;
@@ -417,6 +416,7 @@ struct rxrpc_connection { 
	atomic_t		serial;		/* packet serial number counter */

	unsigned int		hi_serial;	/* highest serial number received */

	u32			security_nonce;	/* response re-use preventer */

	u16			service_id;	/* Service ID, possibly upgraded */

	u8			size_align;	/* data size alignment (for security) */

	u8			security_size;	/* security header size */

	u8			security_ix;	/* security type */

net/rxrpc/conn_client.c

+4 −0
Original line number Diff line number Diff line
@@ -188,6 +188,7 @@ rxrpc_alloc_client_connection(struct rxrpc_conn_parameters *cp, gfp_t gfp) 
	conn->params		= *cp;

	conn->out_clientflag	= RXRPC_CLIENT_INITIATED;

	conn->state		= RXRPC_CONN_CLIENT;

	conn->service_id	= cp->service_id;



	ret = rxrpc_get_client_connection_id(conn, gfp);

	if (ret < 0)
@@ -343,6 +344,7 @@ static int rxrpc_get_client_conn(struct rxrpc_call *call, 
	if (cp->exclusive) {

		call->conn = candidate;

		call->security_ix = candidate->security_ix;

		call->service_id = candidate->service_id;

		_leave(" = 0 [exclusive %d]", candidate->debug_id);

		return 0;

	}
@@ -392,6 +394,7 @@ candidate_published: 
	set_bit(RXRPC_CONN_IN_CLIENT_CONNS, &candidate->flags);

	call->conn = candidate;

	call->security_ix = candidate->security_ix;

	call->service_id = candidate->service_id;

	spin_unlock(&local->client_conns_lock);

	_leave(" = 0 [new %d]", candidate->debug_id);

	return 0;
@@ -413,6 +416,7 @@ found_extant_conn: 
	spin_lock(&conn->channel_lock);

	call->conn = conn;

	call->security_ix = conn->security_ix;

	call->service_id = conn->service_id;

	list_add(&call->chan_wait_link, &conn->waiting_calls);

	spin_unlock(&conn->channel_lock);

	_leave(" = 0 [extant %d]", conn->debug_id);

net/rxrpc/conn_event.c

+2 −2
Original line number Diff line number Diff line
@@ -74,7 +74,7 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn, 
	pkt.whdr.userStatus	= 0;

	pkt.whdr.securityIndex	= conn->security_ix;

	pkt.whdr._rsvd		= 0;

	pkt.whdr.serviceId	= htons(chan->last_service_id);

	pkt.whdr.serviceId	= htons(conn->service_id);



	len = sizeof(pkt.whdr);

	switch (chan->last_type) {
@@ -208,7 +208,7 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn, 
	whdr.userStatus	= 0;

	whdr.securityIndex = conn->security_ix;

	whdr._rsvd	= 0;

	whdr.serviceId	= htons(conn->params.service_id);

	whdr.serviceId	= htons(conn->service_id);



	word		= htonl(conn->local_abort);

net/rxrpc/conn_object.c

+0 −1
Original line number Diff line number Diff line
@@ -167,7 +167,6 @@ void __rxrpc_disconnect_call(struct rxrpc_connection *conn, 
		 * through the channel, whilst disposing of the actual call record.

		 */

		trace_rxrpc_disconnect_call(call);

		chan->last_service_id = call->service_id;

		if (call->abort_code) {

			chan->last_abort = call->abort_code;

			chan->last_type = RXRPC_PACKET_TYPE_ABORT;

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