src/patches/linux/0025-Drivers-hv-vmbus-Support-per-channel-driver-state.patch

   1 From 4b71288758aa1d510402b84ca93b1ef566575d22 Mon Sep 17 00:00:00 2001
   2 From: "K. Y. Srinivasan" <kys@microsoft.com>
   3 Date: Mon, 3 Feb 2014 12:42:45 -0800
   4 Subject: [PATCH 25/25] Drivers: hv: vmbus: Support per-channel driver state
   5
   6 As we implement Virtual Receive Side Scaling on the networking side
   7 (the VRSS patches are currently under review), it will be useful to have
   8 per-channel state that vmbus drivers can manage. Add support for
   9 managing per-channel state.
  10
  11 Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
  12 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  13 ---
  14  include/linux/hyperv.h | 14 ++++++++++++++
  15  1 file changed, 14 insertions(+)
  16
  17 diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
  18 index 6088058a3e00..732dc7e37e96 100644
  19 --- a/include/linux/hyperv.h
  20 +++ b/include/linux/hyperv.h
  21 @@ -1045,6 +1045,10 @@ struct vmbus_channel {
  22          * This will be NULL for the primary channel.
  23          */
  24         struct vmbus_channel *primary_channel;
  25 +       /*
  26 +        * Support per-channel state for use by vmbus drivers.
  27 +        */
  28 +       void *per_channel_state;
  29  };
  30
  31  static inline void set_channel_read_state(struct vmbus_channel *c, bool state)
  32 @@ -1052,6 +1056,16 @@ static inline void set_channel_read_state(struct vmbus_channel *c, bool state)
  33         c->batched_reading = state;
  34  }
  35
  36 +static inline void set_per_channel_state(struct vmbus_channel *c, void *s)
  37 +{
  38 +       c->per_channel_state = s;
  39 +}
  40 +
  41 +static inline void *get_per_channel_state(struct vmbus_channel *c)
  42 +{
  43 +       return c->per_channel_state;
  44 +}
  45 +
  46  void vmbus_onmessage(void *context);
  47
  48  int vmbus_request_offers(void);
  49 --
  50 2.4.3
  51