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-rw-r--r--net/rxrpc/af_rxrpc.c21
-rw-r--r--net/rxrpc/ar-internal.h3
-rw-r--r--net/rxrpc/call_accept.c8
-rw-r--r--net/rxrpc/local_object.c3
-rw-r--r--net/rxrpc/security.c8
5 files changed, 18 insertions, 25 deletions
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index 8dbf7bed2cc4..44c9c2b0b190 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -136,7 +136,8 @@ 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), *prx;
+ struct rxrpc_sock *rx = rxrpc_sk(sk);
+ u16 service_id = srx->srx_service;
int ret;
_enter("%p,%p,%d", rx, saddr, len);
@@ -160,15 +161,12 @@ static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
goto error_unlock;
}
- if (rx->srx.srx_service) {
+ if (service_id) {
write_lock(&local->services_lock);
- hlist_for_each_entry(prx, &local->services, listen_link) {
- if (prx->srx.srx_service == rx->srx.srx_service)
- goto service_in_use;
- }
-
+ if (rcu_access_pointer(local->service))
+ goto service_in_use;
rx->local = local;
- hlist_add_head_rcu(&rx->listen_link, &local->services);
+ rcu_assign_pointer(local->service, rx);
write_unlock(&local->services_lock);
rx->sk.sk_state = RXRPC_SERVER_BOUND;
@@ -599,7 +597,6 @@ static int rxrpc_create(struct net *net, struct socket *sock, int protocol,
rx->family = protocol;
rx->calls = RB_ROOT;
- INIT_HLIST_NODE(&rx->listen_link);
spin_lock_init(&rx->incoming_lock);
INIT_LIST_HEAD(&rx->sock_calls);
INIT_LIST_HEAD(&rx->to_be_accepted);
@@ -681,11 +678,9 @@ static int rxrpc_release_sock(struct sock *sk)
sk->sk_state = RXRPC_CLOSE;
spin_unlock_bh(&sk->sk_receive_queue.lock);
- ASSERTCMP(rx->listen_link.next, !=, LIST_POISON1);
-
- if (!hlist_unhashed(&rx->listen_link)) {
+ if (rx->local && rx->local->service == rx) {
write_lock(&rx->local->services_lock);
- hlist_del_rcu(&rx->listen_link);
+ rx->local->service = NULL;
write_unlock(&rx->local->services_lock);
}
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 6aadaa7d8b43..539db54697f9 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -93,7 +93,6 @@ struct rxrpc_sock {
rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
struct rxrpc_local *local; /* local endpoint */
- struct hlist_node listen_link; /* link in the local endpoint's listen list */
struct rxrpc_backlog *backlog; /* Preallocation for services */
spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
struct list_head sock_calls; /* List of calls owned by this socket */
@@ -216,7 +215,7 @@ struct rxrpc_local {
struct list_head link;
struct socket *socket; /* my UDP socket */
struct work_struct processor;
- struct hlist_head services; /* services listening on this endpoint */
+ struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
struct sk_buff_head reject_queue; /* packets awaiting rejection */
struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
diff --git a/net/rxrpc/call_accept.c b/net/rxrpc/call_accept.c
index a8d39d7cf42c..3cac231d8405 100644
--- a/net/rxrpc/call_accept.c
+++ b/net/rxrpc/call_accept.c
@@ -331,14 +331,14 @@ struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *local,
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
struct rxrpc_sock *rx;
struct rxrpc_call *call;
+ u16 service_id = sp->hdr.serviceId;
_enter("");
/* Get the socket providing the service */
- hlist_for_each_entry_rcu_bh(rx, &local->services, listen_link) {
- if (rx->srx.srx_service == sp->hdr.serviceId)
- goto found_service;
- }
+ rx = rcu_dereference(local->service);
+ if (service_id == rx->srx.srx_service)
+ goto found_service;
trace_rxrpc_abort("INV", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,
RX_INVALID_OPERATION, EOPNOTSUPP);
diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index e3fad80b0795..ff4864d550b8 100644
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -86,7 +86,6 @@ static struct rxrpc_local *rxrpc_alloc_local(const struct sockaddr_rxrpc *srx)
atomic_set(&local->usage, 1);
INIT_LIST_HEAD(&local->link);
INIT_WORK(&local->processor, rxrpc_local_processor);
- INIT_HLIST_HEAD(&local->services);
init_rwsem(&local->defrag_sem);
skb_queue_head_init(&local->reject_queue);
skb_queue_head_init(&local->event_queue);
@@ -292,7 +291,7 @@ static void rxrpc_local_destroyer(struct rxrpc_local *local)
mutex_unlock(&rxrpc_local_mutex);
ASSERT(RB_EMPTY_ROOT(&local->client_conns));
- ASSERT(hlist_empty(&local->services));
+ ASSERT(!local->service);
if (socket) {
local->socket = NULL;
diff --git a/net/rxrpc/security.c b/net/rxrpc/security.c
index 82d8134e9287..7d921e56e715 100644
--- a/net/rxrpc/security.c
+++ b/net/rxrpc/security.c
@@ -131,10 +131,10 @@ int rxrpc_init_server_conn_security(struct rxrpc_connection *conn)
/* find the service */
read_lock(&local->services_lock);
- hlist_for_each_entry(rx, &local->services, listen_link) {
- if (rx->srx.srx_service == conn->params.service_id)
- goto found_service;
- }
+ rx = rcu_dereference_protected(local->service,
+ lockdep_is_held(&local->services_lock));
+ if (rx && rx->srx.srx_service == conn->params.service_id)
+ goto found_service;
/* the service appears to have died */
read_unlock(&local->services_lock);