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Test that when the hash policy is set to custom, traffic is distributed
only according to the outer fields set in the fib_multipath_hash_fields
sysctl.
Each time set a different field and make sure traffic is only
distributed when the field is changed in the packet stream.
The test only verifies the behavior with non-encapsulated IPv4 and IPv6
packets. Subsequent patches will add tests for IPv4/IPv6 overlays on top
of IPv4/IPv6 underlay networks.
Example output:
# ./custom_multipath_hash.sh
TEST: ping [ OK ]
TEST: ping6 [ OK ]
INFO: Running IPv4 custom multipath hash tests
TEST: Multipath hash field: Source IP (balanced) [ OK ]
INFO: Packets sent on path1 / path2: 6353 / 6254
TEST: Multipath hash field: Source IP (unbalanced) [ OK ]
INFO: Packets sent on path1 / path2: 0 / 12600
TEST: Multipath hash field: Destination IP (balanced) [ OK ]
INFO: Packets sent on path1 / path2: 6102 / 6502
TEST: Multipath hash field: Destination IP (unbalanced) [ OK ]
INFO: Packets sent on path1 / path2: 1 / 12601
TEST: Multipath hash field: Source port (balanced) [ OK ]
INFO: Packets sent on path1 / path2: 16428 / 16345
TEST: Multipath hash field: Source port (unbalanced) [ OK ]
INFO: Packets sent on path1 / path2: 32770 / 2
TEST: Multipath hash field: Destination port (balanced) [ OK ]
INFO: Packets sent on path1 / path2: 16428 / 16345
TEST: Multipath hash field: Destination port (unbalanced) [ OK ]
INFO: Packets sent on path1 / path2: 32770 / 2
INFO: Running IPv6 custom multipath hash tests
TEST: Multipath hash field: Source IP (balanced) [ OK ]
INFO: Packets sent on path1 / path2: 6704 / 5903
TEST: Multipath hash field: Source IP (unbalanced) [ OK ]
INFO: Packets sent on path1 / path2: 12600 / 0
TEST: Multipath hash field: Destination IP (balanced) [ OK ]
INFO: Packets sent on path1 / path2: 5551 / 7052
TEST: Multipath hash field: Destination IP (unbalanced) [ OK ]
INFO: Packets sent on path1 / path2: 12603 / 0
TEST: Multipath hash field: Flowlabel (balanced) [ OK ]
INFO: Packets sent on path1 / path2: 8378 / 8080
TEST: Multipath hash field: Flowlabel (unbalanced) [ OK ]
INFO: Packets sent on path1 / path2: 2 / 12603
TEST: Multipath hash field: Source port (balanced) [ OK ]
INFO: Packets sent on path1 / path2: 16385 / 16388
TEST: Multipath hash field: Source port (unbalanced) [ OK ]
INFO: Packets sent on path1 / path2: 0 / 32774
TEST: Multipath hash field: Destination port (balanced) [ OK ]
INFO: Packets sent on path1 / path2: 16386 / 16390
TEST: Multipath hash field: Destination port (unbalanced) [ OK ]
INFO: Packets sent on path1 / path2: 32771 / 2
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Ido Schimmel