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Message-Id: <1453801492-3397-1-git-send-email-decui@microsoft.com> Date: Tue, 26 Jan 2016 01:44:52 -0800 From: Dexuan Cui <decui@...rosoft.com> To: gregkh@...uxfoundation.org, davem@...emloft.net, stephen@...workplumber.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, driverdev-devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com, jasowang@...hat.com, kys@...rosoft.com, vkuznets@...hat.com Cc: pebolle@...cali.nl, stefanha@...hat.com, dan.carpenter@...cle.com Subject: [PATCH V6 5/8] Drivers: hv: vmbus: add a hvsock flag in struct hv_driver Only the coming hv_sock driver has a "true" value for this flag. We treat the hvsock offers/channels as special VMBus devices. Since the hv_sock driver handles all the hvsock offers/channels, we need to tweak vmbus_match() for hv_sock driver, so we introduce this flag. Signed-off-by: Dexuan Cui <decui@...rosoft.com> --- drivers/hv/vmbus_drv.c | 4 ++++ include/linux/hyperv.h | 14 ++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 328e4c3..c1c9d71 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -562,6 +562,10 @@ static int vmbus_match(struct device *device, struct device_driver *driver) struct hv_driver *drv = drv_to_hv_drv(driver); struct hv_device *hv_dev = device_to_hv_device(device); + /* The hv_sock driver handles all hv_sock offers. */ + if (is_hvsock_channel(hv_dev->channel)) + return drv->hvsock; + if (hv_vmbus_get_id(drv->id_table, &hv_dev->dev_type)) return 1; diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index b835d80..5587711 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -964,6 +964,20 @@ extern void vmbus_ontimer(unsigned long data); struct hv_driver { const char *name; + /* + * A hvsock offer, which has a VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER + * channel flag, actually doesn't mean a synthetic device because the + * offer's if_type/if_instance can change for every new hvsock + * connection. + * + * However, to facilitate the notification of new-offer/rescind-offer + * from vmbus driver to hvsock driver, we can handle hvsock offer as + * a special vmbus device, and hence we need the below flag to + * indicate if the driver is the hvsock driver or not: we need to + * specially treat the hvosck offer & driver in vmbus_match(). + */ + bool hvsock; + /* the device type supported by this driver */ uuid_le dev_type; const struct hv_vmbus_device_id *id_table; -- 2.1.0
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