Commit 499e8401 authored by Dexuan Cui's avatar Dexuan Cui Committed by Greg Kroah-Hartman
Browse files

Drivers: hv: vmbus: add a per-channel rescind callback 



This will be used by the coming hv_sock driver.

Signed-off-by: default avatarDexuan Cui <decui@microsoft.com>
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8981da32

drivers/hv/channel_mgmt.c

+11 −0
Original line number Diff line number Diff line
@@ -741,6 +741,10 @@ static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) 
	spin_unlock_irqrestore(&channel->lock, flags);



	if (channel->device_obj) {

		if (channel->chn_rescind_callback) {

			channel->chn_rescind_callback(channel);

			return;

		}

		/*

		 * We will have to unregister this device from the

		 * driver core.
@@ -1110,3 +1114,10 @@ bool vmbus_are_subchannels_present(struct vmbus_channel *primary) 
	return ret;

}

EXPORT_SYMBOL_GPL(vmbus_are_subchannels_present);



void vmbus_set_chn_rescind_callback(struct vmbus_channel *channel,

		void (*chn_rescind_cb)(struct vmbus_channel *))

{

	channel->chn_rescind_callback = chn_rescind_cb;

}

EXPORT_SYMBOL_GPL(vmbus_set_chn_rescind_callback);

include/linux/hyperv.h

+9 −0
Original line number Diff line number Diff line
@@ -765,6 +765,12 @@ struct vmbus_channel { 
	 */

	void (*sc_creation_callback)(struct vmbus_channel *new_sc);



	/*

	 * Channel rescind callback. Some channels (the hvsock ones), need to

	 * register a callback which is invoked in vmbus_onoffer_rescind().

	 */

	void (*chn_rescind_callback)(struct vmbus_channel *channel);



	/*

	 * The spinlock to protect the structure. It is being used to protect

	 * test-and-set access to various attributes of the structure as well
@@ -851,6 +857,9 @@ 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_chn_rescind_callback(struct vmbus_channel *channel,

		void (*chn_rescind_cb)(struct vmbus_channel *));



/*

 * Retrieve the (sub) channel on which to send an outgoing request.

 * When a primary channel has multiple sub-channels, we choose a