From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161785AbcA1EzH (ORCPT ); Wed, 27 Jan 2016 23:55:07 -0500 Received: from p3plsmtps2ded04.prod.phx3.secureserver.net ([208.109.80.198]:39575 "EHLO p3plsmtps2ded04.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161566AbcA1ExV (ORCPT ); Wed, 27 Jan 2016 23:53:21 -0500 x-originating-ip: 72.167.245.219 From: "K. Y. Srinivasan" To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, jasowang@redhat.com Cc: Dexuan Cui , "K. Y. Srinivasan" Subject: [PATCH V2 10/13] Drivers: hv: vmbus: add a per-channel rescind callback Date: Wed, 27 Jan 2016 22:29:42 -0800 Message-Id: <1453962585-32069-10-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1453962585-32069-1-git-send-email-kys@microsoft.com> References: <1453962559-32028-1-git-send-email-kys@microsoft.com> <1453962585-32069-1-git-send-email-kys@microsoft.com> X-CMAE-Envelope: MS4wfPkj92qegPvWL87g9KE57urpYp4DHUyShOiBtDB4IlWF0gL7pjBrZQ33saaJPRk+mIuIrx3YnY11omrkQDBzRQ8dDeN5i5JT/wZWYHaDLW3pSiDEGUNJ rjICCtTAlgR5n/QQBqIFk8caCGmWENezFMZ8vN0BSe8Z6uwa8V2Oc1ZXP2vibt9ky5yoHSh8SDlkfNkKsXzjh8sw6nTn96xatx8DT8XPA+UJjs/2MogTmsx/ 1/mXuYFkMp5MMYGa7vqe1l/4E3ZCzASunmsgem18fyLKSe+CcYoKIHpLXJfFDCABKpOkpgkvGpFZH6V238dTdv14y521/iazARZ9H9L5Rhvs2YPmSClTOyjX mHqTslF4f6qAwTDx/bQxeAJYGs83fYV96WkfKvQnwPkgnkl7JCr9WYOcoMEbW4DFI2KPzAC/MUrGP67w+8pqzoOx+l7ExQ== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dexuan Cui This will be used by the coming hv_sock driver. Signed-off-by: Dexuan Cui Signed-off-by: K. Y. Srinivasan --- drivers/hv/channel_mgmt.c | 11 +++++++++++ include/linux/hyperv.h | 9 +++++++++ 2 files changed, 20 insertions(+), 0 deletions(-) diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 60ca25b..76864c9 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -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); diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index f636f91..2e54e34 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -766,6 +766,12 @@ 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 * as all sc_list operations. @@ -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 -- 1.7.4.1