xen-netback: add control ring boilerplate

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My recent patch to include/xen/interface/io/netif.h defines a new shared
ring (in addition to the rx and tx rings) for passing control messages
from a VM frontend driver to a backend driver.

This patch adds the necessary code to xen-netback to map this new shared
ring, should it be created by a frontend, but does not add implementations
for any of the defined protocol messages. These are added in a subsequent
patch for clarity.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Paul Durrant 2016-05-13 09:37:26 +01:00 • committed by David S. Miller

parent 1ca4673432

commit 4e15ee2cb4

4 changed files with 277 additions and 30 deletions

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28

drivers/net/xen-netback/common.h

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101

drivers/net/xen-netback/interface.c

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99

drivers/net/xen-netback/netback.c

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79

drivers/net/xen-netback/xenbus.c

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