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path: root/src/vnet/adj/rewrite.h
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2024-04-09fib: fix off-by-one error in rewrite length checkBenoît Ganne1-2/+2
The rewrite string can be up to max_size, and max_size can be up to VNET_REWRITE_TOTAL_BYTES. Don't waste the last byte. Type: fix Change-Id: I2fb7e9873b6b4c1e6a55b172c7f753f3c5910802 Signed-off-by: Benoît Ganne <bganne@cisco.com>
2021-11-02fib: allow vnet rewrite max size to be smaller the pre_dataBenoît Ganne1-2/+2
There is no reason to enforce vnet rewrite size to be equal to pre_data. Moreover, since vnet rewrite size is now saved as u8, this limits pre_data to 192 bytes. Type: fix Fixes: 7dbf9a1a4fff5c3b20ad972289e49e3f88e82f2d Change-Id: I3f848aa905ea4a794f3b4aa62c929a481261a3f1 Signed-off-by: Benoît Ganne <bganne@cisco.com>
2021-03-05fib: format function for adjacency flagsNeale Ranns1-0/+2
Type: improvement Signed-off-by: Neale Ranns <neale@graphiant.com> Change-Id: Ib01ed3231321f0f38c4b1deb885c4cf718cc0147
2020-12-08fib: Adjacency flag for midchain to perfom flow hash (on inner packet)Neale Ranns1-0/+5
Type: feature Signed-off-by: Neale Ranns <neale.ranns@cisco.com> Change-Id: I964afd9266645de5c87d49c58ce6b48c2c18f97f
2020-05-04fib: midchain adjacency optimisationsNeale Ranns1-4/+15
Type: improvement - inline some common encap fixup functions into the midchain rewrite node so we don't incur the cost of the virtual function call - change the copy 'guess' from ethernet_header (which will never happen) to an ip4 header - add adj-midchain-tx to multiarch sources - don't run adj-midchain-tx as a feature, instead put this node as the adj's next and at the end of the feature arc. - cache the feature arc config index (to save the cache miss going to fetch it) - don't check if features are enabled when taking the arc (since we know they are) the last two changes will also benefit normal adjacencies taking the arc (i.e. for NAT, ACLs, etc) for IPSec: - don't run esp_encrypt as a feature, instead when required insert this node into the adj's next and into the end of the feature arc. this implies that encrypt is always 'the last feature' run, which is symmetric with decrypt always being the first. - esp_encrpyt for tunnels has adj-midchain-tx as next node Change-Id: Ida0af56a704302cf2d7797ded5f118a781e8acb7 Signed-off-by: Neale Ranns <nranns@cisco.com>
2019-12-03fib: constify the adjacency in the rewrite nodesNeale Ranns1-3/+3
Type: refactor Signed-off-by: Neale Ranns <nranns@cisco.com> Change-Id: I3aad20b35d89fc541fdf185096d71ca12b09a6e2
2019-11-26fib: reduce save_rewrite_length to u8Klement Sekera1-6/+8
This is a preparation step for migrating NAT to use SVR (shallow virtual reassembly) to conserve space in vnet_buffer. Since max rewrite length is currently pre-data size (128), u8 is sufficient to hold that value. Type: refactor Change-Id: I5374bb396e178245b870cb0bbf1370d2a54230bc Signed-off-by: Klement Sekera <ksekera@cisco.com>
2019-07-24fib: remove unused input parameterZhiyong Yang1-5/+2
Type: style Change-Id: I2a21076fffaeb5726be80356aaffc9fea3d95850 Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
2019-03-26Simplify adjacency rewrite codeBenoît Ganne1-115/+23
Using memcpy instead of complex specific copy logic. This simplify the implementation and also improve perf slightly. Also move adjacency data from tail to head of buffer, which improves cache locality (header and data share the same cacheline) Finally, fix VxLAN which used to workaround vnet_rewrite logic. Change-Id: I770ddad9846f7ee505aa99ad417e6a61d5cbbefa Signed-off-by: Benoît Ganne <bganne@cisco.com>
2019-03-07Honor vnet_rewrite_data_t data_bytes == 0Dave Barach1-1/+15
Avoid the cache miss consequences of spraying [functionally harmless] junk into un-prefetched rewrite space. As things stand, several tunnel encap rewrites set rewrite data_bytes = 0, and take a performance hit due to unwanted speculative copying. Should be performance-neutral in speed-path cases, which won't execute the added check. Change-Id: Id83c0325e58c0f31631b4bae5a06457dfc7ed567 Signed-off-by: Dave Barach <dave@barachs.net>
2018-11-14Remove c-11 memcpy checks from perf-critical codeDave Barach1-1/+1
Change-Id: Id4f37f5d4a03160572954a416efa1ef9b3d79ad1 Signed-off-by: Dave Barach <dave@barachs.net>
2018-10-23c11 safe string handling supportDave Barach1-4/+4
Change-Id: Ied34720ca5a6e6e717eea4e86003e854031b6eab Signed-off-by: Dave Barach <dave@barachs.net>
2018-06-11MTU: Software interface / Per-protocol MTU supportOle Troan1-1/+2
This patch separates setting of hardware interfaec and software interface MTU. Software MTU is L2 payload MTU (i.e. not including L2 header). Per-protocol MTU for IPv4, IPv6 and MPLS can also be set. Currently only IP4, IP6 are enabled in adjacency / rewrite code. Documentation in src/vnet/MTU.md Change-Id: Iee2fd6f0bbc8210748dd8e073ab9fab87d323690 Signed-off-by: Ole Troan <ot@cisco.com>
2018-04-18Mcast rewrite optimisationsNeale Ranns1-16/+5
hard code the address mask offsets. This are protocol specific and only used on ethernet when used at all. Change-Id: Ib1f6f33682f53254ffbb5a241a1583e65420e0c7 Signed-off-by: Neale Ranns <nranns@cisco.com>
2018-02-12Improve MTU handlingNeale Ranns1-0/+3
- setting MTU on an interface updates the L3 max bytes too - value cached in the adjacency is also updated - MTU exceeded generates ICMP to sender Change-Id: I343ec71d8e903b529594c4bd0543f04bc7f370b3 Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
2017-04-03Adjacency layout change and move to vnet/adjNeale Ranns1-0/+350
Change-Id: I03195a86c69f84a301051c6b3ab64456bbf28645 Signed-off-by: Neale Ranns <nranns@cisco.com>