The goal of these patches is to fix the following problem: a session is
established (TCP, SCTP) and after a new policy is inserted. The current
code does not recalculate the route, thus the traffic is not encrypted.
The patch propose to check flow_cache_genid value when checking a dst
entry, which is incremented each time a policy is inserted or deleted.
v2: use net->ipv4.rt_genid instead of flow_cache_genid (and thus save a test
in fast path). Also move it to net->rt_genid, to be able to use it for IPv6
too. Note that IPv6 will have one more test in fast path.
v3: remove unrelated "#ifdef CONFIG_XFRM" in IPv6 part
bump rt_genid in selinux code (same place than flow_cache_genid)
Patches are tested with TCP and SCTP, IPv4 and IPv6.
Comments are welcome.
Regards,
Nicolas
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