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Diffstat (limited to 'net/rxrpc/af_rxrpc.c')
-rw-r--r--net/rxrpc/af_rxrpc.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index 31e97f714ca9..fb17552fd292 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -337,6 +337,75 @@ void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call)
EXPORT_SYMBOL(rxrpc_kernel_end_call);
/**
+ * rxrpc_kernel_check_call - Check a call's state
+ * @sock: The socket the call is on
+ * @call: The call to check
+ * @_compl: Where to store the completion state
+ * @_abort_code: Where to store any abort code
+ *
+ * Allow a kernel service to query the state of a call and find out the manner
+ * of its termination if it has completed. Returns -EINPROGRESS if the call is
+ * still going, 0 if the call finished successfully, -ECONNABORTED if the call
+ * was aborted and an appropriate error if the call failed in some other way.
+ */
+int rxrpc_kernel_check_call(struct socket *sock, struct rxrpc_call *call,
+ enum rxrpc_call_completion *_compl, u32 *_abort_code)
+{
+ if (call->state != RXRPC_CALL_COMPLETE)
+ return -EINPROGRESS;
+ smp_rmb();
+ *_compl = call->completion;
+ *_abort_code = call->abort_code;
+ return call->error;
+}
+EXPORT_SYMBOL(rxrpc_kernel_check_call);
+
+/**
+ * rxrpc_kernel_retry_call - Allow a kernel service to retry a call
+ * @sock: The socket the call is on
+ * @call: The call to retry
+ * @srx: The address of the peer to contact
+ * @key: The security context to use (defaults to socket setting)
+ *
+ * Allow a kernel service to try resending a client call that failed due to a
+ * network error to a new address. The Tx queue is maintained intact, thereby
+ * relieving the need to re-encrypt any request data that has already been
+ * buffered.
+ */
+int rxrpc_kernel_retry_call(struct socket *sock, struct rxrpc_call *call,
+ struct sockaddr_rxrpc *srx, struct key *key)
+{
+ struct rxrpc_conn_parameters cp;
+ struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
+ int ret;
+
+ _enter("%d{%d}", call->debug_id, atomic_read(&call->usage));
+
+ if (!key)
+ key = rx->key;
+ if (key && !key->payload.data[0])
+ key = NULL; /* a no-security key */
+
+ memset(&cp, 0, sizeof(cp));
+ cp.local = rx->local;
+ cp.key = key;
+ cp.security_level = 0;
+ cp.exclusive = false;
+ cp.service_id = srx->srx_service;
+
+ mutex_lock(&call->user_mutex);
+
+ ret = rxrpc_prepare_call_for_retry(rx, call);
+ if (ret == 0)
+ ret = rxrpc_retry_client_call(rx, call, &cp, srx, GFP_KERNEL);
+
+ mutex_unlock(&call->user_mutex);
+ _leave(" = %d", ret);
+ return ret;
+}
+EXPORT_SYMBOL(rxrpc_kernel_retry_call);
+
+/**
* rxrpc_kernel_new_call_notification - Get notifications of new calls
* @sock: The socket to intercept received messages on
* @notify_new_call: Function to be called when new calls appear