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authorNikolay Aleksandrov <nikolay@cumulusnetworks.com>2016-07-14 19:28:27 +0300
committerDavid S. Miller <davem@davemloft.net>2016-07-17 06:19:43 +0300
commit43b9e127406079d187794a5140a2411fbc6df2df (patch)
tree0950c4475d02bba3959846242e9c0fe5bb758dda /include/linux/mroute6.h
parenta5a18bdf7453d505783e40e47ebb84bfdd35f93b (diff)
downloadlinux-43b9e127406079d187794a5140a2411fbc6df2df.tar.xz
net: ipmr/ip6mr: add support for keeping an entry age
In preparation for hardware offloading of ipmr/ip6mr we need an interface that allows to check (and later update) the age of entries. Relying on stats alone can show activity but not actual age of the entry, furthermore when there're tens of thousands of entries a lot of the hardware implementations only support "hit" bits which are cleared on read to denote that the entry was active and shouldn't be aged out, these can then be naturally translated into age timestamp and will be compatible with the software forwarding age. Using a lastuse entry doesn't affect performance because the members in that cache line are written to along with the age. Since all new users are encouraged to use ipmr via netlink, this is exported via the RTA_EXPIRES attribute. Also do a minor local variable declaration style adjustment - arrange them longest to shortest. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> CC: Roopa Prabhu <roopa@cumulusnetworks.com> CC: Shrijeet Mukherjee <shm@cumulusnetworks.com> CC: Satish Ashok <sashok@cumulusnetworks.com> CC: Donald Sharp <sharpd@cumulusnetworks.com> CC: David S. Miller <davem@davemloft.net> CC: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> CC: James Morris <jmorris@namei.org> CC: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> CC: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/mroute6.h')
-rw-r--r--include/linux/mroute6.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mroute6.h b/include/linux/mroute6.h
index 66982e764051..3987b64040c5 100644
--- a/include/linux/mroute6.h
+++ b/include/linux/mroute6.h
@@ -92,6 +92,7 @@ struct mfc6_cache {
unsigned long bytes;
unsigned long pkt;
unsigned long wrong_if;
+ unsigned long lastuse;
unsigned char ttls[MAXMIFS]; /* TTL thresholds */
} res;
} mfc_un;