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authorDavid Howells <dhowells@redhat.com>2019-05-16 13:50:31 +0100
committerDavid Howells <dhowells@redhat.com>2019-05-16 15:48:30 +0100
commitbbd172e31696709b58eb492fafb574985b778326 (patch)
tree5a215213707da75e8cb0059c5af46d7b438974fb /net/rxrpc
parent51eba99970797229b3ac8527193171adea5222ed (diff)
downloadlinux-stericsson-bbd172e31696709b58eb492fafb574985b778326.tar.gz
rxrpc: Provide kernel interface to set max lifespan on a call
Provide an interface to set max lifespan on a call from inside of the kernel without having to call kernel_sendmsg(). Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc')
-rw-r--r--net/rxrpc/af_rxrpc.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index ae8c5d7f3bf1..213935fbbbf7 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -443,6 +443,31 @@ void rxrpc_kernel_new_call_notification(
}
EXPORT_SYMBOL(rxrpc_kernel_new_call_notification);
+/**
+ * rxrpc_kernel_set_max_life - Set maximum lifespan on a call
+ * @sock: The socket the call is on
+ * @call: The call to configure
+ * @hard_timeout: The maximum lifespan of the call in jiffies
+ *
+ * Set the maximum lifespan of a call. The call will end with ETIME or
+ * ETIMEDOUT if it takes longer than this.
+ */
+void rxrpc_kernel_set_max_life(struct socket *sock, struct rxrpc_call *call,
+ unsigned long hard_timeout)
+{
+ unsigned long now;
+
+ mutex_lock(&call->user_mutex);
+
+ now = jiffies;
+ hard_timeout += now;
+ WRITE_ONCE(call->expect_term_by, hard_timeout);
+ rxrpc_reduce_call_timer(call, hard_timeout, now, rxrpc_timer_set_for_hard);
+
+ mutex_unlock(&call->user_mutex);
+}
+EXPORT_SYMBOL(rxrpc_kernel_set_max_life);
+
/*
* connect an RxRPC socket
* - this just targets it at a specific destination; no actual connection