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authorStephen Suryaputra <ssuryaextr@gmail.com>2019-06-13 14:38:58 -0400
committerDavid S. Miller <davem@davemloft.net>2019-06-14 19:42:35 -0700
commit363887a2cdfeb6af52a9b78d84697662adf6f8d5 (patch)
treedeae85756a29cfb317bf71a5b473ed71861c7338 /Documentation
parent31c03aef9bc22a64a8324d650ca4198819ef3a33 (diff)
ipv4: Support multipath hashing on inner IP pkts for GRE tunnel
Multipath hash policy value of 0 isn't distributing since the outer IP dest and src aren't varied eventhough the inner ones are. Since the flow is on the inner ones in the case of tunneled traffic, hashing on them is desired. This is done mainly for IP over GRE, hence only tested for that. But anything else supported by flow dissection should work. v2: Use skb_flow_dissect_flow_keys() directly so that other tunneling can be supported through flow dissection (per Nikolay Aleksandrov). v3: Remove accidental inclusion of ports in the hash keys and clarify the documentation (Nikolay Alexandrov). Signed-off-by: Stephen Suryaputra <ssuryaextr@gmail.com> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/networking/ip-sysctl.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index f4b1043e92ed..dc473354d90b 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -80,6 +80,7 @@ fib_multipath_hash_policy - INTEGER
Possible values:
0 - Layer 3
1 - Layer 4
+ 2 - Layer 3 or inner Layer 3 if present
fib_sync_mem - UNSIGNED INTEGER
Amount of dirty memory from fib entries that can be backlogged before