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Diffstat (limited to 'net/rxrpc/af_rxrpc.c')
-rw-r--r--net/rxrpc/af_rxrpc.c141
1 files changed, 133 insertions, 8 deletions
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index bfa8822e2286..2c57df9c131b 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -41,6 +41,8 @@ atomic_t rxrpc_debug_id;
/* count of skbs currently in use */
atomic_t rxrpc_n_skbs;
+struct workqueue_struct *rxrpc_workqueue;
+
static void rxrpc_sock_destructor(struct sock *);
/*
@@ -214,7 +216,8 @@ static int rxrpc_listen(struct socket *sock, int backlog)
*/
static struct rxrpc_transport *rxrpc_name_to_transport(struct socket *sock,
struct sockaddr *addr,
- int addr_len, int flags)
+ int addr_len, int flags,
+ gfp_t gfp)
{
struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *) addr;
struct rxrpc_transport *trans;
@@ -232,17 +235,129 @@ static struct rxrpc_transport *rxrpc_name_to_transport(struct socket *sock,
return ERR_PTR(-EAFNOSUPPORT);
/* find a remote transport endpoint from the local one */
- peer = rxrpc_get_peer(srx, GFP_KERNEL);
+ peer = rxrpc_get_peer(srx, gfp);
if (IS_ERR(peer))
return ERR_PTR(PTR_ERR(peer));
/* find a transport */
- trans = rxrpc_get_transport(rx->local, peer, GFP_KERNEL);
+ trans = rxrpc_get_transport(rx->local, peer, gfp);
rxrpc_put_peer(peer);
_leave(" = %p", trans);
return trans;
}
+/**
+ * rxrpc_kernel_begin_call - Allow a kernel service to begin a call
+ * @sock: The socket on which to make the call
+ * @srx: The address of the peer to contact (defaults to socket setting)
+ * @key: The security context to use (defaults to socket setting)
+ * @user_call_ID: The ID to use
+ *
+ * Allow a kernel service to begin a call on the nominated socket. This just
+ * sets up all the internal tracking structures and allocates connection and
+ * call IDs as appropriate. The call to be used is returned.
+ *
+ * The default socket destination address and security may be overridden by
+ * supplying @srx and @key.
+ */
+struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
+ struct sockaddr_rxrpc *srx,
+ struct key *key,
+ unsigned long user_call_ID,
+ gfp_t gfp)
+{
+ struct rxrpc_conn_bundle *bundle;
+ struct rxrpc_transport *trans;
+ struct rxrpc_call *call;
+ struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
+ __be16 service_id;
+
+ _enter(",,%x,%lx", key_serial(key), user_call_ID);
+
+ lock_sock(&rx->sk);
+
+ if (srx) {
+ trans = rxrpc_name_to_transport(sock, (struct sockaddr *) srx,
+ sizeof(*srx), 0, gfp);
+ if (IS_ERR(trans)) {
+ call = ERR_PTR(PTR_ERR(trans));
+ trans = NULL;
+ goto out;
+ }
+ } else {
+ trans = rx->trans;
+ if (!trans) {
+ call = ERR_PTR(-ENOTCONN);
+ goto out;
+ }
+ atomic_inc(&trans->usage);
+ }
+
+ service_id = rx->service_id;
+ if (srx)
+ service_id = htons(srx->srx_service);
+
+ if (!key)
+ key = rx->key;
+ if (key && !key->payload.data)
+ key = NULL; /* a no-security key */
+
+ bundle = rxrpc_get_bundle(rx, trans, key, service_id, gfp);
+ if (IS_ERR(bundle)) {
+ call = ERR_PTR(PTR_ERR(bundle));
+ goto out;
+ }
+
+ call = rxrpc_get_client_call(rx, trans, bundle, user_call_ID, true,
+ gfp);
+ rxrpc_put_bundle(trans, bundle);
+out:
+ rxrpc_put_transport(trans);
+ release_sock(&rx->sk);
+ _leave(" = %p", call);
+ return call;
+}
+
+EXPORT_SYMBOL(rxrpc_kernel_begin_call);
+
+/**
+ * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using
+ * @call: The call to end
+ *
+ * Allow a kernel service to end a call it was using. The call must be
+ * complete before this is called (the call should be aborted if necessary).
+ */
+void rxrpc_kernel_end_call(struct rxrpc_call *call)
+{
+ _enter("%d{%d}", call->debug_id, atomic_read(&call->usage));
+ rxrpc_remove_user_ID(call->socket, call);
+ rxrpc_put_call(call);
+}
+
+EXPORT_SYMBOL(rxrpc_kernel_end_call);
+
+/**
+ * rxrpc_kernel_intercept_rx_messages - Intercept received RxRPC messages
+ * @sock: The socket to intercept received messages on
+ * @interceptor: The function to pass the messages to
+ *
+ * Allow a kernel service to intercept messages heading for the Rx queue on an
+ * RxRPC socket. They get passed to the specified function instead.
+ * @interceptor should free the socket buffers it is given. @interceptor is
+ * called with the socket receive queue spinlock held and softirqs disabled -
+ * this ensures that the messages will be delivered in the right order.
+ */
+void rxrpc_kernel_intercept_rx_messages(struct socket *sock,
+ rxrpc_interceptor_t interceptor)
+{
+ struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
+
+ _enter("");
+ rx->interceptor = interceptor;
+}
+
+EXPORT_SYMBOL(rxrpc_kernel_intercept_rx_messages);
+
/*
* connect an RxRPC socket
* - this just targets it at a specific destination; no actual connection
@@ -294,7 +409,8 @@ static int rxrpc_connect(struct socket *sock, struct sockaddr *addr,
return -EBUSY; /* server sockets can't connect as well */
}
- trans = rxrpc_name_to_transport(sock, addr, addr_len, flags);
+ trans = rxrpc_name_to_transport(sock, addr, addr_len, flags,
+ GFP_KERNEL);
if (IS_ERR(trans)) {
release_sock(&rx->sk);
_leave(" = %ld", PTR_ERR(trans));
@@ -344,7 +460,7 @@ static int rxrpc_sendmsg(struct kiocb *iocb, struct socket *sock,
if (m->msg_name) {
ret = -EISCONN;
trans = rxrpc_name_to_transport(sock, m->msg_name,
- m->msg_namelen, 0);
+ m->msg_namelen, 0, GFP_KERNEL);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
trans = NULL;
@@ -576,7 +692,7 @@ static int rxrpc_release_sock(struct sock *sk)
/* try to flush out this socket */
rxrpc_release_calls_on_socket(rx);
- flush_scheduled_work();
+ flush_workqueue(rxrpc_workqueue);
rxrpc_purge_queue(&sk->sk_receive_queue);
if (rx->conn) {
@@ -673,15 +789,21 @@ static int __init af_rxrpc_init(void)
rxrpc_epoch = htonl(xtime.tv_sec);
+ ret = -ENOMEM;
rxrpc_call_jar = kmem_cache_create(
"rxrpc_call_jar", sizeof(struct rxrpc_call), 0,
SLAB_HWCACHE_ALIGN, NULL, NULL);
if (!rxrpc_call_jar) {
printk(KERN_NOTICE "RxRPC: Failed to allocate call jar\n");
- ret = -ENOMEM;
goto error_call_jar;
}
+ rxrpc_workqueue = create_workqueue("krxrpcd");
+ if (!rxrpc_workqueue) {
+ printk(KERN_NOTICE "RxRPC: Failed to allocate work queue\n");
+ goto error_work_queue;
+ }
+
ret = proto_register(&rxrpc_proto, 1);
if (ret < 0) {
printk(KERN_CRIT "RxRPC: Cannot register protocol\n");
@@ -719,6 +841,8 @@ error_key_type:
error_sock:
proto_unregister(&rxrpc_proto);
error_proto:
+ destroy_workqueue(rxrpc_workqueue);
+error_work_queue:
kmem_cache_destroy(rxrpc_call_jar);
error_call_jar:
return ret;
@@ -743,9 +867,10 @@ static void __exit af_rxrpc_exit(void)
ASSERTCMP(atomic_read(&rxrpc_n_skbs), ==, 0);
_debug("flush scheduled work");
- flush_scheduled_work();
+ flush_workqueue(rxrpc_workqueue);
proc_net_remove("rxrpc_conns");
proc_net_remove("rxrpc_calls");
+ destroy_workqueue(rxrpc_workqueue);
kmem_cache_destroy(rxrpc_call_jar);
_leave("");
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 23:22:26 +0000