xen-netback: Add stat counters for zerocopy

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These counters help determine how often the buffers had to be copied. Also
they help find out if packets are leaked, as if "sent != success + fail",
there are probably packets never freed up properly.

NOTE: if bisect brought you here, you should apply the series up until
"xen-netback: Timeout packets in RX path", otherwise Windows guests can't work
properly and malicious guests can block other guests by not releasing their sent
packets.

Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Zoltan Kiss 2014-03-06 21:48:28 +00:00 • committed by David S. Miller

parent 62bad3199a

commit 1bb332af4c

3 changed files with 26 additions and 1 deletions

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3

drivers/net/xen-netback/common.h

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15

drivers/net/xen-netback/interface.c

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9

drivers/net/xen-netback/netback.c

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