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| author | Dexuan Cui <decui@microsoft.com> | 2016-01-27 22:29:42 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-07 21:34:12 -0800 |
| commit | 499e8401a515d04daa986b995da710d2b9737764 (patch) | |
| tree | c4ed9be1227b81aba0a72632afbc6cab33e9d12a | |
| parent | 8981da320a11217589aa3c50f9e891bcdef07ece (diff) | |
| download | talos-op-linux-499e8401a515d04daa986b995da710d2b9737764.tar.gz talos-op-linux-499e8401a515d04daa986b995da710d2b9737764.zip | |
Drivers: hv: vmbus: add a per-channel rescind callback
This will be used by the coming hv_sock driver.
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/hv/channel_mgmt.c | 11 | ||||
| -rw-r--r-- | 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 60ca25b93b4c..76864c98a110 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 f636f91f104b..2e54e34e5feb 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 |
