tmp_suning_uos_patched/net/core
Eric Dumazet 960fb622f8 net: provide a per host RSS key generic infrastructure
RSS (Receive Side Scaling) typically uses Toeplitz hash and a 40 or 52 bytes
RSS key.

Some drivers use a constant (and well known key), some drivers use a random
key per port, making bonding setups hard to tune. Well known keys increase
attack surface, considering that number of queues is usually a power of two.

This patch provides infrastructure to help drivers doing the right thing.

netdev_rss_key_fill() should be used by drivers to initialize their RSS key,
even if they provide ethtool -X support to let user redefine the key later.

A new /proc/sys/net/core/netdev_rss_key file can be used to get the host
RSS key even for drivers not providing ethtool -x support, in case some
applications want to precisely setup flows to match some RX queues.

Tested:

myhost:~# cat /proc/sys/net/core/netdev_rss_key
11:63:99:bb:79:fb:a5:a7:07:45:b2:20:bf:02:42:2d:08:1a:dd:19:2b:6b:23:ac:56:28:9d:70:c3:ac:e8:16:4b:b7:c1:10:53:a4:78:41:36:40:74:b6:15:ca:27:44:aa:b3:4d:72

myhost:~# ethtool -x eth0
RX flow hash indirection table for eth0 with 8 RX ring(s):
    0:      0     1     2     3     4     5     6     7
RSS hash key:
11:63:99:bb:79:fb:a5:a7:07:45:b2:20:bf:02:42:2d:08:1a:dd:19:2b:6b:23:ac:56:28:9d:70:c3:ac:e8:16:4b:b7:c1:10:53:a4:78:41

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-16 15:59:11 -05:00
..
datagram.c net: Kill skb_copy_datagram_const_iovec 2014-11-07 12:13:34 -05:00
dev_addr_lists.c net: Add support for device specific address syncing 2014-06-02 10:40:54 -07:00
dev_ioctl.c dev_ioctl: remove dev_load() CAP_SYS_MODULE message 2014-09-05 12:04:40 -07:00
dev.c net: generic dev_disable_lro() stacked device handling 2014-11-13 14:48:56 -05:00
drop_monitor.c net: Replace get_cpu_var through this_cpu_ptr 2014-08-26 13:45:47 -04:00
dst.c ipv4: fix dst race in sk_dst_get() 2014-06-25 17:41:44 -07:00
ethtool.c net: provide a per host RSS key generic infrastructure 2014-11-16 15:59:11 -05:00
fib_rules.c
filter.c net: filter: fix the comments 2014-10-10 15:11:51 -04:00
flow_dissector.c flow-dissector: Fix alignment issue in __skb_flow_get_ports 2014-10-10 15:33:47 -04:00
flow.c
gen_estimator.c net: sched: make bstats per cpu and estimator RCU safe 2014-09-30 01:02:26 -04:00
gen_stats.c net_sched: fix unused variables in __gnet_stats_copy_basic_cpu() 2014-10-07 00:10:49 -04:00
iovec.c net: sendmsg: fix NULL pointer dereference 2014-07-29 12:20:22 -07:00
link_watch.c
Makefile dmaengine-3.17 2014-10-07 20:39:25 -04:00
neighbour.c neigh: remove dynamic neigh table registration support 2014-11-11 15:23:54 -05:00
net_namespace.c netns: remove one sparse warning 2014-09-09 20:10:45 -07:00
net-procfs.c
net-sysfs.c net: gro: add a per device gro flush timer 2014-11-10 12:05:59 -05:00
net-sysfs.h
net-traces.c
netclassid_cgroup.c cgroup: rename cgroup_subsys->base_cftypes to ->legacy_cftypes 2014-07-15 11:05:09 -04:00
netevent.c
netpoll.c net: Pass a "more" indication down into netdev_start_xmit() code paths. 2014-09-01 17:39:55 -07:00
netprio_cgroup.c cgroup: rename cgroup_subsys->base_cftypes to ->legacy_cftypes 2014-07-15 11:05:09 -04:00
pktgen.c net: pktgen: packet bursting via skb->xmit_more 2014-10-01 22:08:12 -04:00
ptp_classifier.c net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
request_sock.c inet: reduce TLB pressure for listeners 2014-06-25 16:37:24 -07:00
rtnetlink.c rtnl/do_setlink(): notify when a netdev is modified 2014-09-02 12:57:04 -07:00
scm.c
secure_seq.c net: use ktime_get_ns() and ktime_get_real_ns() helpers 2014-08-22 19:57:23 -07:00
skbuff.c udp: Changes to udp_offload to support remote checksum offload 2014-11-05 16:30:03 -05:00
sock_diag.c net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
sock.c net: introduce SO_INCOMING_CPU 2014-11-11 13:00:06 -05:00
stream.c
sysctl_net_core.c net: provide a per host RSS key generic infrastructure 2014-11-16 15:59:11 -05:00
timestamping.c net-timestamp: Make the clone operation stand-alone from phy timestamping 2014-09-05 17:43:45 -07:00
tso.c net: tso: fix unaligned access to crafted TCP header in helper API 2014-10-22 12:52:55 -04:00
utils.c net: Convert LIMIT_NETDEBUG to net_dbg_ratelimited 2014-11-11 14:10:31 -05:00