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xen-netback: implement dynamic multicast control

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My recent patch to the Xen Project documents a protocol for 'dynamic
multicast control' in netif.h. This extends the previous multicast control
protocol to not require a shared ring reconnection to turn the feature off.
Instead the backend watches the "request-multicast-control" key in xenstore
and turns the feature off if the key value is written to zero.

This patch adds support for dynamic multicast control in xen-netback.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Durrant 2016-02-02 11:55:05 +00:00 • committed by David S. Miller
parent ce30905aa1
commit 22fae97d86
2 changed files with 82 additions and 8 deletions
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1
drivers/net/xen-netback/common.h
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@ -251,6 +251,7 @@ struct xenvif {
unsigned int stalled_queues;
struct xenbus_watch credit_watch;
struct xenbus_watch mcast_ctrl_watch;
spinlock_t lock;