sfc: support TC decap rules matching on enc_ip_tos

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Allow efx_tc_encap_match entries to include an ip_tos and ip_tos_mask.
To avoid partially-overlapping Outer Rules (which can lead to undefined
 behaviour in the hardware), store extra "pseudo" entries in our
 encap_match hashtable, which are used to enforce that all Outer Rule
 entries within a given <src_ip,dst_ip,udp_dport> tuple (or IPv6
 equivalent) have the same ip_tos_mask.
The "direct" encap_match entry takes a reference on the "pseudo",
 allowing it to be destroyed when all "direct" entries using it are
 removed.
efx_tc_em_pseudo_type is an enum rather than just a bool because in
 future an additional pseudo-type will be added to support Conntrack
 offload.

Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Edward Cree 2023-05-11 20:47:30 +01:00 • committed by David S. Miller

parent 56beb35d85

commit 3c9561c0a5

2 changed files with 133 additions and 36 deletions

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145

drivers/net/ethernet/sfc/tc.c

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24

drivers/net/ethernet/sfc/tc.h

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