diff options
| author |   Piotr Bronowski <piotrx.bronowski@intel.com> | 2022-08-31 13:48:14 +0000 |
|---|---|---|
| committer | Piotr Bronowski <piotrx.bronowski@intel.com> | 2022-09-12 11:55:14 +0200 |
| commit | 993b6bee63d4f455db0a6021c9659aad4545acf2 (patch) | |
| tree | 9c098bf4cadb56fbb3170264b0801c1565cac872 /src/vnet/ipsec/ipsec_input.c | |
| parent | a27aa6b413512415a592ecd1f14714fd1634d29c (diff) | |
ipsec: introduce fast path ipv4 inbound matching
This patch introduces fast path matching for inbound traffic ipv4.
Fast path uses bihash tables in order to find matching policy. Adding
and removing policies in fast path is much faster than in current
implementation. It is still new feature and further work needs
and can be done in order to improve perfromance.
Type: feature
Signed-off-by: Piotr Bronowski <piotrx.bronowski@intel.com>
Change-Id: Ifbd5bfecc21b76ddf8363f5dc089d77595196675
Diffstat (limited to 'src/vnet/ipsec/ipsec_input.c')
| -rw-r--r-- | src/vnet/ipsec/ipsec_input.c | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/src/vnet/ipsec/ipsec_input.c b/src/vnet/ipsec/ipsec_input.c index 09166bccf5b..0c572c83e96 100644 --- a/src/vnet/ipsec/ipsec_input.c +++ b/src/vnet/ipsec/ipsec_input.c @@ -19,6 +19,7 @@ #include <vnet/api_errno.h> #include <vnet/ip/ip.h> #include <vnet/feature/feature.h> +#include <vnet/ipsec/ipsec_spd_fp_lookup.h> #include <vnet/ipsec/ipsec.h> #include <vnet/ipsec/esp.h> @@ -149,6 +150,18 @@ ipsec4_input_spd_find_flow_cache_entry (ipsec_main_t *im, u32 sa, u32 da, return p; } +always_inline void +ipsec_fp_in_5tuple_from_ip4_range (ipsec_fp_5tuple_t *tuple, u32 la, u32 ra, + u32 spi, u8 action) +{ + clib_memset (tuple->l3_zero_pad, 0, sizeof (tuple->l3_zero_pad)); + tuple->laddr.as_u32 = la; + tuple->raddr.as_u32 = ra; + tuple->spi = spi; + tuple->action = action; + tuple->is_ipv6 = 0; +} + always_inline ipsec_policy_t * ipsec_input_policy_match (ipsec_spd_t *spd, u32 sa, u32 da, ipsec_spd_policy_type_t policy_type) @@ -317,6 +330,9 @@ VLIB_NODE_FN (ipsec4_input_node) (vlib_main_t * vm, ipsec_policy_t *p0 = NULL; u8 has_space0; bool search_flow_cache = false; + ipsec_policy_t *policies[1]; + ipsec_fp_5tuple_t tuples[1]; + bool ip_v6 = true; if (n_left_from > 2) { @@ -351,7 +367,19 @@ VLIB_NODE_FN (ipsec4_input_node) (vlib_main_t * vm, search_flow_cache = im->input_flow_cache_flag; esp_or_udp: - if (search_flow_cache) // attempt to match policy in flow cache + if (im->fp_spd_ipv4_in_is_enabled && + PREDICT_TRUE (INDEX_INVALID != + spd0->fp_spd.ip4_in_lookup_hash_idx)) + { + ipsec_fp_in_5tuple_from_ip4_range ( + &tuples[0], ip0->src_address.as_u32, ip0->dst_address.as_u32, + clib_net_to_host_u32 (esp0->spi), + IPSEC_SPD_POLICY_IP4_INBOUND_PROTECT); + ipsec_fp_in_policy_match_n (&spd0->fp_spd, !ip_v6, tuples, + policies, 1); + p0 = policies[0]; + } + else if (search_flow_cache) // attempt to match policy in flow cache { p0 = ipsec4_input_spd_find_flow_cache_entry ( im, ip0->src_address.as_u32, ip0->dst_address.as_u32, @@ -392,7 +420,16 @@ VLIB_NODE_FN (ipsec4_input_node) (vlib_main_t * vm, pi0 = ~0; }; - if (search_flow_cache) + if (im->fp_spd_ipv4_in_is_enabled && + PREDICT_TRUE (INDEX_INVALID != + spd0->fp_spd.ip4_in_lookup_hash_idx)) + { + tuples->action = IPSEC_SPD_POLICY_IP4_INBOUND_BYPASS; + ipsec_fp_in_policy_match_n (&spd0->fp_spd, !ip_v6, tuples, + policies, 1); + p0 = policies[0]; + } + else if (search_flow_cache) { p0 = ipsec4_input_spd_find_flow_cache_entry ( im, ip0->src_address.as_u32, ip0->dst_address.as_u32, @@ -424,7 +461,18 @@ VLIB_NODE_FN (ipsec4_input_node) (vlib_main_t * vm, pi0 = ~0; }; - if (search_flow_cache) + if (im->fp_spd_ipv4_in_is_enabled && + PREDICT_TRUE (INDEX_INVALID != + spd0->fp_spd.ip4_in_lookup_hash_idx)) + { + tuples->action = IPSEC_SPD_POLICY_IP4_INBOUND_DISCARD; + ipsec_fp_in_policy_match_n (&spd0->fp_spd, !ip_v6, tuples, + policies, 1); + p0 = policies[0]; + } + else + + if (search_flow_cache) { p0 = ipsec4_input_spd_find_flow_cache_entry ( im, ip0->src_address.as_u32, ip0->dst_address.as_u32, |