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65 lines
2.3 KiB
Diff
65 lines
2.3 KiB
Diff
From fb6b14a429dae008b7fee772a1e27cb09db459b7 Mon Sep 17 00:00:00 2001
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From: Dexuan Cui <decui@microsoft.com>
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Date: Wed, 27 Jan 2016 22:29:41 -0800
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Subject: [PATCH 19/25] Drivers: hv: vmbus: add a hvsock flag in struct
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hv_driver
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Only the coming hv_sock driver has a "true" value for this flag.
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We treat the hvsock offers/channels as special VMBus devices.
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Since the hv_sock driver handles all the hvsock offers/channels, we need to
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tweak vmbus_match() for hv_sock driver, so we introduce this flag.
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Signed-off-by: Dexuan Cui <decui@microsoft.com>
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Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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(cherry picked from commit 8981da320a11217589aa3c50f9e891bcdef07ece)
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---
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drivers/hv/vmbus_drv.c | 4 ++++
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include/linux/hyperv.h | 14 ++++++++++++++
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2 files changed, 18 insertions(+)
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diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
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index 7e46a48..7d607ad 100644
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--- a/drivers/hv/vmbus_drv.c
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+++ b/drivers/hv/vmbus_drv.c
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@@ -563,6 +563,10 @@ static int vmbus_match(struct device *device, struct device_driver *driver)
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struct hv_driver *drv = drv_to_hv_drv(driver);
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struct hv_device *hv_dev = device_to_hv_device(device);
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+ /* The hv_sock driver handles all hv_sock offers. */
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+ if (is_hvsock_channel(hv_dev->channel))
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+ return drv->hvsock;
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+
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if (hv_vmbus_get_id(drv->id_table, hv_dev->dev_type.b))
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return 1;
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diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
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index 3f485a4..9ee79af 100644
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--- a/include/linux/hyperv.h
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+++ b/include/linux/hyperv.h
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@@ -966,6 +966,20 @@ extern void vmbus_ontimer(unsigned long data);
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struct hv_driver {
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const char *name;
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+ /*
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+ * A hvsock offer, which has a VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER
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+ * channel flag, actually doesn't mean a synthetic device because the
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+ * offer's if_type/if_instance can change for every new hvsock
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+ * connection.
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+ *
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+ * However, to facilitate the notification of new-offer/rescind-offer
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+ * from vmbus driver to hvsock driver, we can handle hvsock offer as
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+ * a special vmbus device, and hence we need the below flag to
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+ * indicate if the driver is the hvsock driver or not: we need to
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+ * specially treat the hvosck offer & driver in vmbus_match().
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+ */
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+ bool hvsock;
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+
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/* the device type supported by this driver */
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uuid_le dev_type;
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const struct hv_vmbus_device_id *id_table;
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--
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2.8.0.rc3
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