xen-netfront: reduce gso_max_size to account for max TCP header

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The maximum packet including header that can be handled by netfront / netback
wire format is 65535. Reduce gso_max_size accordingly.

Drop skb and print warning when skb->len > 65535. This can 1) save the effort
to send malformed packet to netback, 2) help spotting misconfiguration of
netfront in the future.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Wei Liu 2013-04-22 02:20:41 +00:00 • committed by David S. Miller

parent 697089dc13

commit 9ecd1a75d9

2 changed files with 16 additions and 2 deletions

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17

drivers/net/xen-netfront.c

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1

include/xen/interface/io/netif.h

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