[PATCH V6 6/8] Drivers: hv: vmbus: add a per-channel rescind callback
From: Dexuan Cui <decui@microsoft.com>
Date: 2016-01-26 08:08:46
Also in:
lkml
Subsystem:
hyper-v/azure core and drivers, the rest · Maintainers:
"K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, Linus Torvalds
This will be used by the coming hv_sock driver. Signed-off-by: Dexuan Cui <decui@microsoft.com> --- drivers/hv/channel_mgmt.c | 11 +++++++++++ include/linux/hyperv.h | 9 +++++++++ 2 files changed, 20 insertions(+)
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 4611b50..b782944 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c@@ -608,6 +608,10 @@ 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.
@@ -977,3 +981,10 @@ 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 5587711..ff89d4c 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h@@ -740,6 +740,12 @@ 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.
@@ -825,6 +831,9 @@ 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
--
2.1.0