return s;
}
+always_inline void
+ipsec4_out_spd_add_flow_cache_entry (ipsec_main_t *im, u8 pr, u32 la, u32 ra,
+ u16 lp, u16 rp, u32 pol_id)
+{
+ u64 hash;
+ u8 overwrite = 0, stale_overwrite = 0;
+ ipsec4_spd_5tuple_t ip4_5tuple = { .ip4_addr = { (ip4_address_t) la,
+ (ip4_address_t) ra },
+ .port = { lp, rp },
+ .proto = pr };
+
+ ip4_5tuple.kv_16_8.value = (((u64) pol_id) << 32) | ((u64) im->epoch_count);
+
+ hash = ipsec4_hash_16_8 (&ip4_5tuple.kv_16_8);
+ hash &= (im->ipsec4_out_spd_hash_num_buckets - 1);
+
+ ipsec_spinlock_lock (&im->ipsec4_out_spd_hash_tbl[hash].bucket_lock);
+ /* Check if we are overwriting an existing entry so we know
+ whether to increment the flow cache counter. Since flow
+ cache counter is reset on any policy add/remove, but
+ hash table values are not, we also need to check if the entry
+ we are overwriting is stale or not. If it's a stale entry
+ overwrite, we still want to increment flow cache counter */
+ overwrite = (im->ipsec4_out_spd_hash_tbl[hash].value != 0);
+ /* Check for stale entry by comparing with current epoch count */
+ if (PREDICT_FALSE (overwrite))
+ stale_overwrite =
+ (im->epoch_count !=
+ ((u32) (im->ipsec4_out_spd_hash_tbl[hash].value & 0xFFFFFFFF)));
+ clib_memcpy_fast (&im->ipsec4_out_spd_hash_tbl[hash], &ip4_5tuple.kv_16_8,
+ sizeof (ip4_5tuple.kv_16_8));
+ ipsec_spinlock_unlock (&im->ipsec4_out_spd_hash_tbl[hash].bucket_lock);
+
+ /* Increment the counter to track active flow cache entries
+ when entering a fresh entry or overwriting a stale one */
+ if (!overwrite || stale_overwrite)
+ clib_atomic_fetch_add_relax (&im->ipsec4_out_spd_flow_cache_entries, 1);
+
+ return;
+}
+
+always_inline ipsec_policy_t *
+ipsec4_out_spd_find_flow_cache_entry (ipsec_main_t *im, u8 pr, u32 la, u32 ra,
+ u16 lp, u16 rp)
+{
+ ipsec_policy_t *p = NULL;
+ ipsec4_hash_kv_16_8_t kv_result;
+ u64 hash;
+
+ if (PREDICT_FALSE ((pr != IP_PROTOCOL_TCP) && (pr != IP_PROTOCOL_UDP) &&
+ (pr != IP_PROTOCOL_SCTP)))
+ {
+ lp = 0;
+ rp = 0;
+ }
+ ipsec4_spd_5tuple_t ip4_5tuple = { .ip4_addr = { (ip4_address_t) la,
+ (ip4_address_t) ra },
+ .port = { lp, rp },
+ .proto = pr };
+
+ hash = ipsec4_hash_16_8 (&ip4_5tuple.kv_16_8);
+ hash &= (im->ipsec4_out_spd_hash_num_buckets - 1);
+
+ ipsec_spinlock_lock (&im->ipsec4_out_spd_hash_tbl[hash].bucket_lock);
+ kv_result = im->ipsec4_out_spd_hash_tbl[hash];
+ ipsec_spinlock_unlock (&im->ipsec4_out_spd_hash_tbl[hash].bucket_lock);
+
+ if (ipsec4_hash_key_compare_16_8 ((u64 *) &ip4_5tuple.kv_16_8,
+ (u64 *) &kv_result))
+ {
+ if (im->epoch_count == ((u32) (kv_result.value & 0xFFFFFFFF)))
+ {
+ /* Get the policy based on the index */
+ p =
+ pool_elt_at_index (im->policies, ((u32) (kv_result.value >> 32)));
+ }
+ }
+
+ return p;
+}
+
always_inline ipsec_policy_t *
-ipsec_output_policy_match (ipsec_spd_t * spd, u8 pr, u32 la, u32 ra, u16 lp,
- u16 rp)
+ipsec_output_policy_match (ipsec_spd_t *spd, u8 pr, u32 la, u32 ra, u16 lp,
+ u16 rp, u8 flow_cache_enabled)
{
ipsec_main_t *im = &ipsec_main;
ipsec_policy_t *p;
if (la > clib_net_to_host_u32 (p->laddr.stop.ip4.as_u32))
continue;
- if (PREDICT_FALSE
- ((pr != IP_PROTOCOL_TCP) && (pr != IP_PROTOCOL_UDP)
- && (pr != IP_PROTOCOL_SCTP)))
- return p;
+ if (PREDICT_FALSE ((pr != IP_PROTOCOL_TCP) && (pr != IP_PROTOCOL_UDP) &&
+ (pr != IP_PROTOCOL_SCTP)))
+ {
+ lp = 0;
+ rp = 0;
+ goto add_flow_cache;
+ }
if (lp < p->lport.start)
continue;
if (rp > p->rport.stop)
continue;
+ add_flow_cache:
+ if (flow_cache_enabled)
+ {
+ /* Add an Entry in Flow cache */
+ ipsec4_out_spd_add_flow_cache_entry (
+ im, pr, clib_host_to_net_u32 (la), clib_host_to_net_u32 (ra),
+ clib_host_to_net_u16 (lp), clib_host_to_net_u16 (rp), *i);
+ }
+
return p;
}
return 0;
ipsec_spd_t *spd0 = 0;
int bogus;
u64 nc_protect = 0, nc_bypass = 0, nc_discard = 0, nc_nomatch = 0;
+ u8 flow_cache_enabled = im->flow_cache_flag;
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
{
u32 bi0, pi0, bi1;
vlib_buffer_t *b0, *b1;
- ipsec_policy_t *p0;
+ ipsec_policy_t *p0 = NULL;
ip4_header_t *ip0;
ip6_header_t *ip6_0 = 0;
udp_header_t *udp0;
sw_if_index0, spd_index0, spd0->id);
#endif
- p0 = ipsec_output_policy_match (spd0, ip0->protocol,
- clib_net_to_host_u32
- (ip0->src_address.as_u32),
- clib_net_to_host_u32
- (ip0->dst_address.as_u32),
- clib_net_to_host_u16
- (udp0->src_port),
- clib_net_to_host_u16
- (udp0->dst_port));
+ /*
+ * Check whether flow cache is enabled.
+ */
+ if (flow_cache_enabled)
+ {
+ p0 = ipsec4_out_spd_find_flow_cache_entry (
+ im, ip0->protocol, ip0->src_address.as_u32,
+ ip0->dst_address.as_u32, udp0->src_port, udp0->dst_port);
+ }
+
+ /* Fall back to linear search if flow cache lookup fails */
+ if (p0 == NULL)
+ {
+ p0 = ipsec_output_policy_match (
+ spd0, ip0->protocol,
+ clib_net_to_host_u32 (ip0->src_address.as_u32),
+ clib_net_to_host_u32 (ip0->dst_address.as_u32),
+ clib_net_to_host_u16 (udp0->src_port),
+ clib_net_to_host_u16 (udp0->dst_port), flow_cache_enabled);
+ }
}
tcp0 = (void *) udp0;
if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_OFFLOAD))
{
- u32 oflags = vnet_buffer (b0)->oflags;
+ vnet_buffer_oflags_t oflags = vnet_buffer (b0)->oflags;
/*
* Clearing offload flags before checksum is computed
Code Review / vpp.git / blobdiff