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authorBjorn Andersson <bjorn.andersson@linaro.org>2017-06-07 14:07:39 -0700
committerDavid S. Miller <davem@davemloft.net>2017-06-08 11:34:57 -0400
commitb24844b1b537c34e3069c4bcfb448a5a05c9e0dc (patch)
tree669f69d4c0997832483d89fb4dc344c74d12efe7 /net/qrtr
parent1784473b242585f407d3e75654d5b06f462a355b (diff)
downloadlinux-stericsson-b24844b1b537c34e3069c4bcfb448a5a05c9e0dc.tar.gz
net: qrtr: Inform open sockets about new controller
As the higher level communication only deals with "services" the a service directory is required to keep track of local and remote services. In order for qrtr clients to be informed about when the service directory implementation is available some event needs to be passed to them. Rather than introducing support for broadcasting such a message in-band to all open local sockets we flag each socket with ENETRESET, as there are no other expected operations that would benefit from having support from locally broadcasting messages. Cc: Courtney Cavin <ccavin@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/qrtr')
-rw-r--r--net/qrtr/qrtr.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index d7516098b5aa..c7a5d861906b 100644
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -530,6 +530,26 @@ static int qrtr_port_assign(struct qrtr_sock *ipc, int *port)
return 0;
}
+/* Reset all non-control ports */
+static void qrtr_reset_ports(void)
+{
+ struct qrtr_sock *ipc;
+ int id;
+
+ mutex_lock(&qrtr_port_lock);
+ idr_for_each_entry(&qrtr_ports, ipc, id) {
+ /* Don't reset control port */
+ if (id == 0)
+ continue;
+
+ sock_hold(&ipc->sk);
+ ipc->sk.sk_err = ENETRESET;
+ wake_up_interruptible(sk_sleep(&ipc->sk));
+ sock_put(&ipc->sk);
+ }
+ mutex_unlock(&qrtr_port_lock);
+}
+
/* Bind socket to address.
*
* Socket should be locked upon call.
@@ -558,6 +578,10 @@ static int __qrtr_bind(struct socket *sock,
sock_reset_flag(sk, SOCK_ZAPPED);
+ /* Notify all open ports about the new controller */
+ if (port == QRTR_PORT_CTRL)
+ qrtr_reset_ports();
+
return 0;
}