For now only 1 event is defined: HVSOCK_RESCIND_CHANNEL.
We'll have more events in the future.
Signed-off-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
---
drivers/hv/channel_mgmt.c | 18 ++++++++++++++++++
include/linux/hyperv.h | 17 +++++++++++++++++
2 files changed, 35 insertions(+)
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 4611b50..87fc7d2 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -608,6 +608,16 @@ static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr)
spin_unlock_irqrestore(&channel->lock, flags);
if (channel->device_obj) {
+ if (is_hvsock_channel(channel) &&
+ channel->hvsock_event_callback) {
+ channel->hvsock_event_callback(channel,
+ HVSOCK_RESCIND_CHANNEL);
+ /*
+ * We can't invoke vmbus_device_unregister()
+ * until the socket fd is closed.
+ */
+ return;
+ }
/*
* We will have to unregister this device from the
* driver core.
@@ -977,3 +987,11 @@ bool vmbus_are_subchannels_present(struct vmbus_channel *primary)
return ret;
}
EXPORT_SYMBOL_GPL(vmbus_are_subchannels_present);
+
+void vmbus_set_hvsock_event_callback(struct vmbus_channel *channel,
+ void (*hvsock_event_callback)(struct vmbus_channel *,
+ enum hvsock_event))
+{
+ channel->hvsock_event_callback = hvsock_event_callback;
+}
+EXPORT_SYMBOL_GPL(vmbus_set_hvsock_event_callback);
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index b4cc44c..7e507bb 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -645,6 +645,12 @@ enum hv_signal_policy {
HV_SIGNAL_POLICY_EXPLICIT,
};
+/* hvsock related definitions */
+enum hvsock_event {
+ /* The host application is close()-ing the connection */
+ HVSOCK_RESCIND_CHANNEL,
+};
+
struct vmbus_channel {
/* Unique channel id */
int id;
@@ -740,6 +746,13 @@ struct vmbus_channel {
void (*sc_creation_callback)(struct vmbus_channel *new_sc);
/*
+ * hvsock event callback.
+ * For now only 1 event is defined: HVSOCK_RESCIND_CHANNEL.
+ */
+ void (*hvsock_event_callback)(struct vmbus_channel *channel,
+ enum hvsock_event event);
+
+ /*
* The spinlock to protect the structure. It is being used to protect
* test-and-set access to various attributes of the structure as well
* as all sc_list operations.
@@ -825,6 +838,10 @@ int vmbus_request_offers(void);
void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel,
void (*sc_cr_cb)(struct vmbus_channel *new_sc));
+void vmbus_set_hvsock_event_callback(struct vmbus_channel *channel,
+ void (*hvsock_event_callback)(struct vmbus_channel *,
+ enum hvsock_event));
+
/*
* Retrieve the (sub) channel on which to send an outgoing request.
* When a primary channel has multiple sub-channels, we choose a
--
2.1.4
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