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-rw-r--r--net/rxrpc/ar-accept.c119
1 files changed, 112 insertions, 7 deletions
diff --git a/net/rxrpc/ar-accept.c b/net/rxrpc/ar-accept.c
index e7af780cd6f9..92a87fde8bfe 100644
--- a/net/rxrpc/ar-accept.c
+++ b/net/rxrpc/ar-accept.c
@@ -139,7 +139,7 @@ static int rxrpc_accept_incoming_call(struct rxrpc_local *local,
call->conn->state = RXRPC_CONN_SERVER_CHALLENGING;
atomic_inc(&call->conn->usage);
set_bit(RXRPC_CONN_CHALLENGE, &call->conn->events);
- schedule_work(&call->conn->processor);
+ rxrpc_queue_conn(call->conn);
} else {
_debug("conn ready");
call->state = RXRPC_CALL_SERVER_ACCEPTING;
@@ -183,7 +183,7 @@ invalid_service:
if (!test_bit(RXRPC_CALL_RELEASE, &call->flags) &&
!test_and_set_bit(RXRPC_CALL_RELEASE, &call->events)) {
rxrpc_get_call(call);
- schedule_work(&call->processor);
+ rxrpc_queue_call(call);
}
read_unlock_bh(&call->state_lock);
rxrpc_put_call(call);
@@ -310,7 +310,8 @@ security_mismatch:
* handle acceptance of a call by userspace
* - assign the user call ID to the call at the front of the queue
*/
-int rxrpc_accept_call(struct rxrpc_sock *rx, unsigned long user_call_ID)
+struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *rx,
+ unsigned long user_call_ID)
{
struct rxrpc_call *call;
struct rb_node *parent, **pp;
@@ -374,12 +375,76 @@ int rxrpc_accept_call(struct rxrpc_sock *rx, unsigned long user_call_ID)
BUG();
if (test_and_set_bit(RXRPC_CALL_ACCEPTED, &call->events))
BUG();
- schedule_work(&call->processor);
+ rxrpc_queue_call(call);
+ rxrpc_get_call(call);
write_unlock_bh(&call->state_lock);
write_unlock(&rx->call_lock);
- _leave(" = 0");
- return 0;
+ _leave(" = %p{%d}", call, call->debug_id);
+ return call;
+
+ /* if the call is already dying or dead, then we leave the socket's ref
+ * on it to be released by rxrpc_dead_call_expired() as induced by
+ * rxrpc_release_call() */
+out_release:
+ _debug("release %p", call);
+ if (!test_bit(RXRPC_CALL_RELEASED, &call->flags) &&
+ !test_and_set_bit(RXRPC_CALL_RELEASE, &call->events))
+ rxrpc_queue_call(call);
+out_discard:
+ write_unlock_bh(&call->state_lock);
+ _debug("discard %p", call);
+out:
+ write_unlock(&rx->call_lock);
+ _leave(" = %d", ret);
+ return ERR_PTR(ret);
+}
+
+/*
+ * handle rejectance of a call by userspace
+ * - reject the call at the front of the queue
+ */
+int rxrpc_reject_call(struct rxrpc_sock *rx)
+{
+ struct rxrpc_call *call;
+ int ret;
+
+ _enter("");
+
+ ASSERT(!irqs_disabled());
+
+ write_lock(&rx->call_lock);
+
+ ret = -ENODATA;
+ if (list_empty(&rx->acceptq))
+ goto out;
+
+ /* dequeue the first call and check it's still valid */
+ call = list_entry(rx->acceptq.next, struct rxrpc_call, accept_link);
+ list_del_init(&call->accept_link);
+ sk_acceptq_removed(&rx->sk);
+
+ write_lock_bh(&call->state_lock);
+ switch (call->state) {
+ case RXRPC_CALL_SERVER_ACCEPTING:
+ call->state = RXRPC_CALL_SERVER_BUSY;
+ if (test_and_set_bit(RXRPC_CALL_REJECT_BUSY, &call->events))
+ rxrpc_queue_call(call);
+ ret = 0;
+ goto out_release;
+ case RXRPC_CALL_REMOTELY_ABORTED:
+ case RXRPC_CALL_LOCALLY_ABORTED:
+ ret = -ECONNABORTED;
+ goto out_release;
+ case RXRPC_CALL_NETWORK_ERROR:
+ ret = call->conn->error;
+ goto out_release;
+ case RXRPC_CALL_DEAD:
+ ret = -ETIME;
+ goto out_discard;
+ default:
+ BUG();
+ }
/* if the call is already dying or dead, then we leave the socket's ref
* on it to be released by rxrpc_dead_call_expired() as induced by
@@ -388,7 +453,7 @@ out_release:
_debug("release %p", call);
if (!test_bit(RXRPC_CALL_RELEASED, &call->flags) &&
!test_and_set_bit(RXRPC_CALL_RELEASE, &call->events))
- schedule_work(&call->processor);
+ rxrpc_queue_call(call);
out_discard:
write_unlock_bh(&call->state_lock);
_debug("discard %p", call);
@@ -397,3 +462,43 @@ out:
_leave(" = %d", ret);
return ret;
}
+
+/**
+ * rxrpc_kernel_accept_call - Allow a kernel service to accept an incoming call
+ * @sock: The socket on which the impending call is waiting
+ * @user_call_ID: The tag to attach to the call
+ *
+ * Allow a kernel service to accept an incoming call, assuming the incoming
+ * call is still valid.
+ */
+struct rxrpc_call *rxrpc_kernel_accept_call(struct socket *sock,
+ unsigned long user_call_ID)
+{
+ struct rxrpc_call *call;
+
+ _enter(",%lx", user_call_ID);
+ call = rxrpc_accept_call(rxrpc_sk(sock->sk), user_call_ID);
+ _leave(" = %p", call);
+ return call;
+}
+
+EXPORT_SYMBOL(rxrpc_kernel_accept_call);
+
+/**
+ * rxrpc_kernel_reject_call - Allow a kernel service to reject an incoming call
+ * @sock: The socket on which the impending call is waiting
+ *
+ * Allow a kernel service to reject an incoming call with a BUSY message,
+ * assuming the incoming call is still valid.
+ */
+int rxrpc_kernel_reject_call(struct socket *sock)
+{
+ int ret;
+
+ _enter("");
+ ret = rxrpc_reject_call(rxrpc_sk(sock->sk));
+ _leave(" = %d", ret);
+ return ret;
+}
+
+EXPORT_SYMBOL(rxrpc_kernel_reject_call);