From 1291e9d1084506c5cba6313ce809d7516bb5868a Mon Sep 17 00:00:00 2001 From: David Howells Date: Thu, 30 Jun 2016 12:02:53 +0100 Subject: rxrpc: Move data_ready peer lookup into rxrpc_find_connection() Move the peer lookup done in input.c by data_ready into rxrpc_find_connection(). Signed-off-by: David Howells diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index 6fdee76..0fe63ba 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -564,7 +564,6 @@ void rxrpc_extract_conn_params(struct rxrpc_conn_proto *, struct rxrpc_local *, struct sk_buff *); struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_local *, - struct rxrpc_peer *, struct sk_buff *); void __rxrpc_disconnect_call(struct rxrpc_call *); void rxrpc_disconnect_call(struct rxrpc_call *); @@ -768,8 +767,6 @@ static inline void rxrpc_sysctl_exit(void) {} /* * utils.c */ -void rxrpc_get_addr_from_skb(struct rxrpc_local *, const struct sk_buff *, - struct sockaddr_rxrpc *); int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); /* diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 89bc648..1307138 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -68,52 +68,91 @@ struct rxrpc_connection *rxrpc_alloc_connection(gfp_t gfp) * packet */ struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_local *local, - struct rxrpc_peer *peer, struct sk_buff *skb) { struct rxrpc_connection *conn; + struct rxrpc_conn_proto k; struct rxrpc_skb_priv *sp = rxrpc_skb(skb); + struct sockaddr_rxrpc srx; + struct rxrpc_peer *peer; struct rb_node *p; - u32 epoch, cid; _enter(",{%x,%x}", sp->hdr.cid, sp->hdr.flags); - read_lock_bh(&peer->conn_lock); + if (rxrpc_extract_addr_from_skb(&srx, skb) < 0) + goto not_found; - cid = sp->hdr.cid & RXRPC_CIDMASK; - epoch = sp->hdr.epoch; + /* We may have to handle mixing IPv4 and IPv6 */ + if (srx.transport.family != local->srx.transport.family) { + pr_warn_ratelimited("AF_RXRPC: Protocol mismatch %u not %u\n", + srx.transport.family, + local->srx.transport.family); + goto not_found; + } + + k.epoch = sp->hdr.epoch; + k.cid = sp->hdr.cid & RXRPC_CIDMASK; if (sp->hdr.flags & RXRPC_CLIENT_INITIATED) { + /* 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. + */ + peer = rxrpc_lookup_peer_rcu(local, &srx); + if (!peer) + goto not_found; + + read_lock_bh(&peer->conn_lock); + p = peer->service_conns.rb_node; while (p) { conn = rb_entry(p, struct rxrpc_connection, service_node); _debug("maybe %x", conn->proto.cid); - if (epoch < conn->proto.epoch) + if (k.epoch < conn->proto.epoch) p = p->rb_left; - else if (epoch > conn->proto.epoch) + else if (k.epoch > conn->proto.epoch) p = p->rb_right; - else if (cid < conn->proto.cid) + else if (k.cid < conn->proto.cid) p = p->rb_left; - else if (cid > conn->proto.cid) + else if (k.cid > conn->proto.cid) p = p->rb_right; else - goto found; + goto found_service_conn; } + read_unlock_bh(&peer->conn_lock); } else { - conn = idr_find(&rxrpc_client_conn_ids, cid >> RXRPC_CIDSHIFT); - if (conn && - conn->proto.epoch == epoch && - conn->params.peer == peer) - goto found; + conn = idr_find(&rxrpc_client_conn_ids, + k.cid >> RXRPC_CIDSHIFT); + if (!conn || + conn->proto.epoch != k.epoch || + conn->params.local != local) + goto not_found; + + peer = conn->params.peer; + switch (srx.transport.family) { + case AF_INET: + if (peer->srx.transport.sin.sin_port != + srx.transport.sin.sin_port || + peer->srx.transport.sin.sin_addr.s_addr != + srx.transport.sin.sin_addr.s_addr) + goto not_found; + break; + default: + BUG(); + } + + conn = rxrpc_get_connection_maybe(conn); + _leave(" = %p", conn); + return conn; } - read_unlock_bh(&peer->conn_lock); +not_found: _leave(" = NULL"); return NULL; -found: +found_service_conn: conn = rxrpc_get_connection_maybe(conn); read_unlock_bh(&peer->conn_lock); _leave(" = %p", conn); diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c index b993f2d..c243647 100644 --- a/net/rxrpc/input.c +++ b/net/rxrpc/input.c @@ -626,32 +626,6 @@ int rxrpc_extract_header(struct rxrpc_skb_priv *sp, struct sk_buff *skb) return 0; } -static struct rxrpc_connection *rxrpc_conn_from_local(struct rxrpc_local *local, - struct sk_buff *skb) -{ - struct rxrpc_peer *peer; - struct rxrpc_connection *conn; - struct sockaddr_rxrpc srx; - - rxrpc_get_addr_from_skb(local, skb, &srx); - rcu_read_lock(); - peer = rxrpc_lookup_peer_rcu(local, &srx); - if (!peer) - goto cant_find_peer; - - conn = rxrpc_find_connection(local, peer, skb); - rcu_read_unlock(); - if (!conn) - goto cant_find_conn; - - return conn; - -cant_find_peer: - rcu_read_unlock(); -cant_find_conn: - return NULL; -} - /* * handle data received on the local endpoint * - may be called in interrupt context @@ -731,7 +705,9 @@ void rxrpc_data_ready(struct sock *sk) * old-fashioned way doesn't really hurt */ struct rxrpc_connection *conn; - conn = rxrpc_conn_from_local(local, skb); + rcu_read_lock(); + conn = rxrpc_find_connection(local, skb); + rcu_read_unlock(); if (!conn) goto cant_route_call; diff --git a/net/rxrpc/utils.c b/net/rxrpc/utils.c index d3db02e..b88914d 100644 --- a/net/rxrpc/utils.c +++ b/net/rxrpc/utils.c @@ -15,33 +15,6 @@ #include "ar-internal.h" /* - * Set up an RxRPC address from a socket buffer. - */ -void rxrpc_get_addr_from_skb(struct rxrpc_local *local, - const struct sk_buff *skb, - struct sockaddr_rxrpc *srx) -{ - memset(srx, 0, sizeof(*srx)); - srx->transport_type = local->srx.transport_type; - srx->transport.family = local->srx.transport.family; - - /* Can we see an ipv4 UDP packet on an ipv6 UDP socket? and vice - * versa? - */ - switch (srx->transport.family) { - case AF_INET: - srx->transport.sin.sin_port = udp_hdr(skb)->source; - srx->transport_len = sizeof(struct sockaddr_in); - memcpy(&srx->transport.sin.sin_addr, &ip_hdr(skb)->saddr, - sizeof(struct in_addr)); - break; - - default: - BUG(); - } -} - -/* * Fill out a peer address from a socket buffer containing a packet. */ int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *srx, struct sk_buff *skb) -- cgit v0.10.2