af_rxrpc: Keep rxrpc_call pointers in a hashtable
Keep track of rxrpc_call structures in a hashtable so they can be
found directly from the network parameters which define the call.
This allows incoming packets to be routed directly to a call without walking
through hierarchy of peer -> transport -> connection -> call and all the
spinlocks that that entailed.
Signed-off-by: Tim Smith <tim@electronghost.co.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 1ecd070..c831d44 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -396,9 +396,20 @@
#define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
+ struct hlist_node hash_node;
+ unsigned long hash_key; /* Full hash key */
+ u8 in_clientflag; /* Copy of conn->in_clientflag for hashing */
+ struct rxrpc_local *local; /* Local endpoint. Used for hashing. */
+ sa_family_t proto; /* Frame protocol */
/* the following should all be in net order */
__be32 cid; /* connection ID + channel index */
__be32 call_id; /* call ID on connection */
+ __be32 epoch; /* epoch of this connection */
+ __be16 service_id; /* service ID */
+ union { /* Peer IP address for hashing */
+ __be32 ipv4_addr;
+ __u8 ipv6_addr[16]; /* Anticipates eventual IPv6 support */
+ } peer_ip;
};
/*
@@ -453,6 +464,8 @@
extern struct list_head rxrpc_calls;
extern rwlock_t rxrpc_call_lock;
+struct rxrpc_call *rxrpc_find_call_hash(u8, __be32, __be32, __be32,
+ __be16, void *, sa_family_t, const u8 *);
struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *,
struct rxrpc_transport *,
struct rxrpc_conn_bundle *,