ipsec: compress ipsec_sa_t so data used by dataplane code fits in cacheline

Change-Id: I81ecdf9fdcfcb017117b47dc031f93208e004d7c
Signed-off-by: Damjan Marion <damarion@cisco.com>
Signed-off-by: Neale Ranns <nranns@cisco.com>

11 files changed, 129 insertions, 91 deletions

diff --git a/src/vnet/ipsec/ah_decrypt.c b/src/vnet/ipsec/ah_decrypt.c
index b0916f99ef6..87e1de1b3ce 100644
--- a/src/vnet/ipsec/ah_decrypt.c
+++ b/src/vnet/ipsec/ah_decrypt.c
@@ -151,11 +151,11 @@ ah_decrypt_inline (vlib_main_t * vm,
 	  seq = clib_host_to_net_u32 (ah0->seq_no);
 
 	  /* anti-replay check */
-	  if (sa0->use_anti_replay)
+	  if (ipsec_sa_is_set_USE_ANTI_REPLAY (sa0))
 	    {
 	      int rv = 0;
 
-	      if (PREDICT_TRUE (sa0->use_esn))
+	      if (PREDICT_TRUE (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa0)))
 		rv = esp_replay_check_esn (sa0, seq);
 	      else
 		rv = esp_replay_check (sa0, seq);
@@ -210,9 +210,10 @@ ah_decrypt_inline (vlib_main_t * vm,
 		  goto trace;
 		}
 
-	      if (PREDICT_TRUE (sa0->use_anti_replay))
+	      if (PREDICT_TRUE (ipsec_sa_is_set_USE_ANTI_REPLAY (sa0)))
 		{
-		  if (PREDICT_TRUE (sa0->use_esn))
+		  if (PREDICT_TRUE
+		      (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa0)))
 		    esp_replay_advance_esn (sa0, seq);
 		  else
 		    esp_replay_advance (sa0, seq);
@@ -225,7 +226,7 @@ ah_decrypt_inline (vlib_main_t * vm,
 			       icv_padding_len);
 	  i_b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 
-	  if (PREDICT_TRUE (sa0->is_tunnel))
+	  if (PREDICT_TRUE (ipsec_sa_is_set_IS_TUNNEL (sa0)))
 	    {			/* tunnel mode */
 	      if (PREDICT_TRUE (ah0->nexthdr == IP_PROTOCOL_IP_IN_IP))
 		next0 = AH_DECRYPT_NEXT_IP4_INPUT;
diff --git a/src/vnet/ipsec/ah_encrypt.c b/src/vnet/ipsec/ah_encrypt.c
index 95be1412c90..2eab3ac1746 100644
--- a/src/vnet/ipsec/ah_encrypt.c
+++ b/src/vnet/ipsec/ah_encrypt.c
@@ -140,7 +140,7 @@ ah_encrypt_inline (vlib_main_t * vm,
 	  ttl = ih0->ip4.ttl;
 	  tos = ih0->ip4.tos;
 
-	  if (PREDICT_TRUE (sa0->is_tunnel))
+	  if (PREDICT_TRUE (ipsec_sa_is_set_IS_TUNNEL (sa0)))
 	    {
 	      if (is_ip6)
 		adv = -sizeof (ip6_and_ah_header_t);
@@ -156,7 +156,7 @@ ah_encrypt_inline (vlib_main_t * vm,
 	  const u8 padding_len = ah_calc_icv_padding_len (icv_size, is_ip6);
 	  adv -= padding_len;
 	  /* transport mode save the eth header before it is overwritten */
-	  if (PREDICT_FALSE (!sa0->is_tunnel))
+	  if (PREDICT_FALSE (!ipsec_sa_is_set_IS_TUNNEL (sa0)))
 	    {
 	      ethernet_header_t *ieh0 = (ethernet_header_t *)
 		((u8 *) vlib_buffer_get_current (i_b0) -
@@ -177,7 +177,7 @@ ah_encrypt_inline (vlib_main_t * vm,
 	      hop_limit = ih6_0->ip6.hop_limit;
 	      ip_version_traffic_class_and_flow_label =
 		ih6_0->ip6.ip_version_traffic_class_and_flow_label;
-	      if (PREDICT_TRUE (sa0->is_tunnel))
+	      if (PREDICT_TRUE (ipsec_sa_is_set_IS_TUNNEL (sa0)))
 		{
 		  next_hdr_type = IP_PROTOCOL_IPV6;
 		}
@@ -206,7 +206,7 @@ ah_encrypt_inline (vlib_main_t * vm,
 	      oh0 = vlib_buffer_get_current (i_b0);
 	      clib_memset (oh0, 0, sizeof (ip4_and_ah_header_t));
 
-	      if (PREDICT_TRUE (sa0->is_tunnel))
+	      if (PREDICT_TRUE (ipsec_sa_is_set_IS_TUNNEL (sa0)))
 		{
 		  next_hdr_type = IP_PROTOCOL_IP_IN_IP;
 		}
@@ -233,7 +233,8 @@ ah_encrypt_inline (vlib_main_t * vm,
 	    }
 
 
-	  if (PREDICT_TRUE (!is_ip6 && sa0->is_tunnel && !sa0->is_tunnel_ip6))
+	  if (PREDICT_TRUE (!is_ip6 && ipsec_sa_is_set_IS_TUNNEL (sa0) &&
+			    !ipsec_sa_is_set_IS_TUNNEL_V6 (sa0)))
 	    {
 	      oh0->ip4.src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32;
 	      oh0->ip4.dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32;
@@ -242,7 +243,8 @@ ah_encrypt_inline (vlib_main_t * vm,
 	      vnet_buffer (i_b0)->ip.adj_index[VLIB_TX] =
 		sa0->dpo[IPSEC_PROTOCOL_AH].dpoi_index;
 	    }
-	  else if (is_ip6 && sa0->is_tunnel && sa0->is_tunnel_ip6)
+	  else if (is_ip6 && ipsec_sa_is_set_IS_TUNNEL (sa0) &&
+		   ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))
 	    {
 	      oh6_0->ip6.src_address.as_u64[0] =
 		sa0->tunnel_src_addr.ip6.as_u64[0];
@@ -282,7 +284,7 @@ ah_encrypt_inline (vlib_main_t * vm,
 	      oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
 	    }
 
-	  if (!sa0->is_tunnel)
+	  if (!ipsec_sa_is_set_IS_TUNNEL (sa0))
 	    {
 	      next0 = AH_ENCRYPT_NEXT_INTERFACE_OUTPUT;
 	      vlib_buffer_advance (i_b0, -sizeof (ethernet_header_t));
diff --git a/src/vnet/ipsec/esp.h b/src/vnet/ipsec/esp.h
index 063b74b7c5c..1f894ab09af 100644
--- a/src/vnet/ipsec/esp.h
+++ b/src/vnet/ipsec/esp.h
@@ -184,12 +184,12 @@ esp_replay_advance_esn (ipsec_sa_t * sa, u32 seq)
 always_inline int
 esp_seq_advance (ipsec_sa_t * sa)
 {
-  if (PREDICT_TRUE (sa->use_esn))
+  if (PREDICT_TRUE (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa)))
     {
       if (PREDICT_FALSE (sa->seq == ESP_SEQ_MAX))
 	{
-	  if (PREDICT_FALSE
-	      (sa->use_anti_replay && sa->seq_hi == ESP_SEQ_MAX))
+	  if (PREDICT_FALSE (ipsec_sa_is_set_USE_ANTI_REPLAY (sa) &&
+			     sa->seq_hi == ESP_SEQ_MAX))
 	    return 1;
 	  sa->seq_hi++;
 	}
@@ -197,7 +197,8 @@ esp_seq_advance (ipsec_sa_t * sa)
     }
   else
     {
-      if (PREDICT_FALSE (sa->use_anti_replay && sa->seq == ESP_SEQ_MAX))
+      if (PREDICT_FALSE (ipsec_sa_is_set_USE_ANTI_REPLAY (sa) &&
+			 sa->seq == ESP_SEQ_MAX))
 	return 1;
       sa->seq++;
     }
@@ -223,7 +224,7 @@ hmac_calc (vlib_main_t * vm, ipsec_sa_t * sa, u8 * data, int data_len,
   op->dst = signature;
   op->hmac_trunc_len = sa->integ_trunc_size;
 
-  if (sa->use_esn)
+  if (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa))
     {
       u32 seq_hi = clib_host_to_net_u32 (sa->seq_hi);
 
diff --git a/src/vnet/ipsec/esp_decrypt.c b/src/vnet/ipsec/esp_decrypt.c
index 7860ca33d18..7f3c320e12c 100644
--- a/src/vnet/ipsec/esp_decrypt.c
+++ b/src/vnet/ipsec/esp_decrypt.c
@@ -147,11 +147,11 @@ esp_decrypt_inline (vlib_main_t * vm,
       seq = clib_host_to_net_u32 (esp0->seq);
 
       /* anti-replay check */
-      if (sa0->use_anti_replay)
+      if (ipsec_sa_is_set_USE_ANTI_REPLAY (sa0))
 	{
 	  int rv = 0;
 
-	  if (PREDICT_TRUE (sa0->use_esn))
+	  if (PREDICT_TRUE (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa0)))
 	    rv = esp_replay_check_esn (sa0, seq);
 	  else
 	    rv = esp_replay_check (sa0, seq);
@@ -197,9 +197,9 @@ esp_decrypt_inline (vlib_main_t * vm,
 	    }
 	}
 
-      if (PREDICT_TRUE (sa0->use_anti_replay))
+      if (PREDICT_TRUE (ipsec_sa_is_set_USE_ANTI_REPLAY (sa0)))
 	{
-	  if (PREDICT_TRUE (sa0->use_esn))
+	  if (PREDICT_TRUE (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa0)))
 	    esp_replay_advance_esn (sa0, seq);
 	  else
 	    esp_replay_advance (sa0, seq);
@@ -222,7 +222,8 @@ esp_decrypt_inline (vlib_main_t * vm,
 	  ob[0]->current_data = sizeof (ethernet_header_t);
 
 	  /* transport mode */
-	  if (PREDICT_FALSE (!sa0->is_tunnel && !sa0->is_tunnel_ip6))
+	  if (PREDICT_FALSE (!ipsec_sa_is_set_IS_TUNNEL (sa0) &&
+			     !ipsec_sa_is_set_IS_TUNNEL_V6 (sa0)))
 	    {
 	      tunnel_mode = 0;
 
@@ -235,7 +236,7 @@ esp_decrypt_inline (vlib_main_t * vm,
 	      else
 		{
 		  ip_hdr_size = sizeof (ip4_header_t);
-		  if (sa0->udp_encap)
+		  if (ipsec_sa_is_set_UDP_ENCAP (sa0))
 		    ih4 = (ip4_header_t *) ((u8 *) esp0 - ip_hdr_size -
 					    sizeof (udp_header_t));
 		  else
diff --git a/src/vnet/ipsec/esp_encrypt.c b/src/vnet/ipsec/esp_encrypt.c
index c792a149f12..6e5007151b9 100644
--- a/src/vnet/ipsec/esp_encrypt.c
+++ b/src/vnet/ipsec/esp_encrypt.c
@@ -289,7 +289,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
       /* space for IV */
       hdr_len = iv_sz;
 
-      if (sa0->is_tunnel)
+      if (ipsec_sa_is_set_IS_TUNNEL (sa0))
 	{
 	  payload = vlib_buffer_get_current (b[0]);
 	  next_hdr_ptr = esp_add_footer_and_icv (b[0], block_sz, icv_sz);
@@ -303,7 +303,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 	  esp = (esp_header_t *) (payload - hdr_len);
 
 	  /* optional UDP header */
-	  if (sa0->udp_encap)
+	  if (ipsec_sa_is_set_UDP_ENCAP (sa0))
 	    {
 	      hdr_len += sizeof (udp_header_t);
 	      esp_fill_udp_hdr (sa0, (udp_header_t *) (payload - hdr_len),
@@ -311,7 +311,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 	    }
 
 	  /* IP header */
-	  if (sa0->is_tunnel_ip6)
+	  if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))
 	    {
 	      ip6_header_t *ip6;
 	      u16 len = sizeof (ip6_header_t);
@@ -361,7 +361,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 	  esp = (esp_header_t *) (payload - hdr_len);
 
 	  /* optional UDP header */
-	  if (sa0->udp_encap)
+	  if (ipsec_sa_is_set_UDP_ENCAP (sa0))
 	    {
 	      hdr_len += sizeof (udp_header_t);
 	      udp = (udp_header_t *) (payload - hdr_len);
@@ -434,7 +434,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 	  op->len = payload_len - icv_sz + iv_sz + sizeof (esp_header_t);
 	  op->flags = 0;
 	  op->user_data = b - bufs;
-	  if (sa0->use_esn)
+	  if (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa0))
 	    {
 	      u32 seq_hi = clib_net_to_host_u32 (sa0->seq_hi);
 	      clib_memcpy_fast (op->dst, &seq_hi, sizeof (seq_hi));
@@ -455,7 +455,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 	  tr->sa_index = sa_index0;
 	  tr->spi = sa0->spi;
 	  tr->seq = sa0->seq - 1;
-	  tr->udp_encap = sa0->udp_encap;
+	  tr->udp_encap = ipsec_sa_is_set_UDP_ENCAP (sa0);
 	  tr->crypto_alg = sa0->crypto_alg;
 	  tr->integ_alg = sa0->integ_alg;
 	}
diff --git a/src/vnet/ipsec/ipsec_api.c b/src/vnet/ipsec/ipsec_api.c
index f43cae99cc9..da175b2e5b9 100644
--- a/src/vnet/ipsec/ipsec_api.c
+++ b/src/vnet/ipsec/ipsec_api.c
@@ -320,15 +320,15 @@ ipsec_sad_flags_encode (const ipsec_sa_t * sa)
 {
   vl_api_ipsec_sad_flags_t flags = IPSEC_API_SAD_FLAG_NONE;
 
-  if (sa->use_esn)
+  if (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa))
     flags |= IPSEC_API_SAD_FLAG_USE_EXTENDED_SEQ_NUM;
-  if (sa->use_anti_replay)
+  if (ipsec_sa_is_set_USE_ANTI_REPLAY (sa))
     flags |= IPSEC_API_SAD_FLAG_USE_ANTI_REPLAY;
-  if (sa->is_tunnel)
+  if (ipsec_sa_is_set_IS_TUNNEL (sa))
     flags |= IPSEC_API_SAD_FLAG_IS_TUNNEL;
-  if (sa->is_tunnel_ip6)
+  if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa))
     flags |= IPSEC_API_SAD_FLAG_IS_TUNNEL_V6;
-  if (sa->udp_encap)
+  if (ipsec_sa_is_set_UDP_ENCAP (sa))
     flags |= IPSEC_API_SAD_FLAG_UDP_ENCAP;
 
   return clib_host_to_net_u32 (flags);
@@ -690,7 +690,7 @@ send_ipsec_sa_details (ipsec_sa_t * sa, vl_api_registration_t * reg,
 
   mp->entry.flags = ipsec_sad_flags_encode (sa);
 
-  if (sa->is_tunnel)
+  if (ipsec_sa_is_set_IS_TUNNEL (sa))
     {
       ip_address_encode (&sa->tunnel_src_addr, IP46_TYPE_ANY,
 			 &mp->entry.tunnel_src);
@@ -702,12 +702,12 @@ send_ipsec_sa_details (ipsec_sa_t * sa, vl_api_registration_t * reg,
   mp->salt = clib_host_to_net_u32 (sa->salt);
   mp->seq_outbound = clib_host_to_net_u64 (((u64) sa->seq));
   mp->last_seq_inbound = clib_host_to_net_u64 (((u64) sa->last_seq));
-  if (sa->use_esn)
+  if (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa))
     {
       mp->seq_outbound |= (u64) (clib_host_to_net_u32 (sa->seq_hi));
       mp->last_seq_inbound |= (u64) (clib_host_to_net_u32 (sa->last_seq_hi));
     }
-  if (sa->use_anti_replay)
+  if (ipsec_sa_is_set_USE_ANTI_REPLAY (sa))
     mp->replay_window = clib_host_to_net_u64 (sa->replay_window);
 
   vl_api_send_msg (reg, (u8 *) mp);
diff --git a/src/vnet/ipsec/ipsec_format.c b/src/vnet/ipsec/ipsec_format.c
index e682386eee1..1ad3a53c45b 100644
--- a/src/vnet/ipsec/ipsec_format.c
+++ b/src/vnet/ipsec/ipsec_format.c
@@ -256,12 +256,13 @@ format_ipsec_sa (u8 * s, va_list * args)
 
   s = format (s, "[%d] sa 0x%x spi %u mode %s%s protocol %s%s%s%s",
 	      sai, sa->id, sa->spi,
-	      sa->is_tunnel ? "tunnel" : "transport",
-	      sa->is_tunnel_ip6 ? "-ip6" : "",
+	      ipsec_sa_is_set_IS_TUNNEL (sa) ? "tunnel" : "transport",
+	      ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? "-ip6" : "",
 	      sa->protocol ? "esp" : "ah",
-	      sa->udp_encap ? " udp-encap-enabled" : "",
-	      sa->use_anti_replay ? " anti-replay" : "",
-	      sa->use_esn ? " extended-sequence-number" : "");
+	      ipsec_sa_is_set_UDP_ENCAP (sa) ? " udp-encap-enabled" : "",
+	      ipsec_sa_is_set_USE_ANTI_REPLAY (sa) ? " anti-replay" : "",
+	      ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa) ?
+	      " extended-sequence-number" : "");
   s = format (s, "\n   seq %u seq-hi %u", sa->seq, sa->seq_hi);
   s = format (s, "\n   last-seq %u last-seq-hi %u window %U",
 	      sa->last_seq, sa->last_seq_hi,
@@ -276,7 +277,7 @@ format_ipsec_sa (u8 * s, va_list * args)
   vlib_get_combined_counter (&ipsec_sa_counters, sai, &counts);
   s = format (s, "\n   packets %u bytes %u", counts.packets, counts.bytes);
 
-  if (sa->is_tunnel)
+  if (ipsec_sa_is_set_IS_TUNNEL (sa))
     {
       tx_table_id = fib_table_get_table_id (sa->tx_fib_index,
 					    FIB_PROTOCOL_IP4);
diff --git a/src/vnet/ipsec/ipsec_if.c b/src/vnet/ipsec/ipsec_if.c
index bf3460423fb..b1c05346dd0 100644
--- a/src/vnet/ipsec/ipsec_if.c
+++ b/src/vnet/ipsec/ipsec_if.c
@@ -466,7 +466,7 @@ ipsec_add_del_ipsec_gre_tunnel (vnet_main_t * vnm,
   osa = p[0];
   sa = pool_elt_at_index (im->sad, p[0]);
 
-  if (sa->is_tunnel)
+  if (ipsec_sa_is_set_IS_TUNNEL (sa))
     {
       key.remote_ip = sa->tunnel_dst_addr.ip4.as_u32;
       key.spi = clib_host_to_net_u32 (sa->spi);
@@ -599,13 +599,14 @@ ipsec_set_interface_sa (vnet_main_t * vnm, u32 hw_if_index, u32 sa_id,
       old_sa_index = t->input_sa_index;
       old_sa = pool_elt_at_index (im->sad, old_sa_index);
 
-      if (sa->is_tunnel_ip6 ^ old_sa->is_tunnel_ip6)
+      if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ^
+	  ipsec_sa_is_set_IS_TUNNEL_V6 (old_sa))
 	{
 	  clib_warning ("IPsec interface SA endpoints type can't be changed");
 	  return VNET_API_ERROR_INVALID_VALUE;
 	}
 
-      if (sa->is_tunnel_ip6)
+      if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa))
 	{
 	  ipsec6_tunnel_key_t key;
 
@@ -651,7 +652,8 @@ ipsec_set_interface_sa (vnet_main_t * vnm, u32 hw_if_index, u32 sa_id,
       old_sa_index = t->output_sa_index;
       old_sa = pool_elt_at_index (im->sad, old_sa_index);
 
-      if (sa->is_tunnel_ip6 ^ old_sa->is_tunnel_ip6)
+      if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ^
+	  ipsec_sa_is_set_IS_TUNNEL_V6 (old_sa))
 	{
 	  clib_warning ("IPsec interface SA endpoints type can't be changed");
 	  return VNET_API_ERROR_INVALID_VALUE;
diff --git a/src/vnet/ipsec/ipsec_input.c b/src/vnet/ipsec/ipsec_input.c
index 0070e33e729..970211eccaa 100644
--- a/src/vnet/ipsec/ipsec_input.c
+++ b/src/vnet/ipsec/ipsec_input.c
@@ -84,7 +84,7 @@ ipsec_input_protect_policy_match (ipsec_spd_t * spd, u32 sa, u32 da, u32 spi)
     if (spi != s->spi)
       continue;
 
-    if (s->is_tunnel)
+    if (ipsec_sa_is_set_IS_TUNNEL (s))
       {
 	if (da != clib_net_to_host_u32 (s->tunnel_dst_addr.ip4.as_u32))
 	  continue;
@@ -140,7 +140,7 @@ ipsec6_input_protect_policy_match (ipsec_spd_t * spd,
     if (spi != s->spi)
       continue;
 
-    if (s->is_tunnel)
+    if (ipsec_sa_is_set_IS_TUNNEL (s))
       {
 	if (!ip6_address_is_equal (sa, &s->tunnel_src_addr.ip6))
 	  continue;
diff --git a/src/vnet/ipsec/ipsec_sa.c b/src/vnet/ipsec/ipsec_sa.c
index 3e29c0406e3..3d62395bd7c 100644
--- a/src/vnet/ipsec/ipsec_sa.c
+++ b/src/vnet/ipsec/ipsec_sa.c
@@ -73,17 +73,18 @@ ipsec_sa_stack (ipsec_sa_t * sa)
   fib_forward_chain_type_t fct;
   dpo_id_t tmp = DPO_INVALID;
 
-  fct = fib_forw_chain_type_from_fib_proto ((sa->is_tunnel_ip6 ?
-					     FIB_PROTOCOL_IP6 :
-					     FIB_PROTOCOL_IP4));
+  fct =
+    fib_forw_chain_type_from_fib_proto ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ?
+					 FIB_PROTOCOL_IP6 :
+					 FIB_PROTOCOL_IP4));
 
   fib_entry_contribute_forwarding (sa->fib_entry_index, fct, &tmp);
 
-  dpo_stack_from_node ((sa->is_tunnel_ip6 ?
+  dpo_stack_from_node ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ?
 			im->ah6_encrypt_node_index :
 			im->ah4_encrypt_node_index),
 		       &sa->dpo[IPSEC_PROTOCOL_AH], &tmp);
-  dpo_stack_from_node ((sa->is_tunnel_ip6 ?
+  dpo_stack_from_node ((ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ?
 			im->esp6_encrypt_node_index :
 			im->esp4_encrypt_node_index),
 		       &sa->dpo[IPSEC_PROTOCOL_ESP], &tmp);
@@ -135,7 +136,7 @@ ipsec_sa_add (u32 id,
   if (p)
     return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
 
-  pool_get_zero (im->sad, sa);
+  pool_get_aligned_zero (im->sad, sa, CLIB_CACHE_LINE_BYTES);
 
   fib_node_init (&sa->node, FIB_NODE_TYPE_IPSEC_SA);
   sa_index = sa - im->sad;
@@ -155,15 +156,15 @@ ipsec_sa_add (u32 id,
   ip46_address_copy (&sa->tunnel_dst_addr, tun_dst);
 
   if (flags & IPSEC_SA_FLAG_USE_EXTENDED_SEQ_NUM)
-    sa->use_esn = 1;
+    ipsec_sa_set_USE_EXTENDED_SEQ_NUM (sa);
   if (flags & IPSEC_SA_FLAG_USE_ANTI_REPLAY)
-    sa->use_anti_replay = 1;
+    ipsec_sa_set_USE_ANTI_REPLAY (sa);
   if (flags & IPSEC_SA_FLAG_IS_TUNNEL)
-    sa->is_tunnel = 1;
+    ipsec_sa_set_IS_TUNNEL (sa);
   if (flags & IPSEC_SA_FLAG_IS_TUNNEL_V6)
-    sa->is_tunnel_ip6 = 1;
+    ipsec_sa_set_IS_TUNNEL_V6 (sa);
   if (flags & IPSEC_SA_FLAG_UDP_ENCAP)
-    sa->udp_encap = 1;
+    ipsec_sa_set_UDP_ENCAP (sa);
 
   err = ipsec_check_support_cb (im, sa);
   if (err)
@@ -180,13 +181,13 @@ ipsec_sa_add (u32 id,
       return VNET_API_ERROR_SYSCALL_ERROR_1;
     }
 
-  if (sa->is_tunnel)
+  if (ipsec_sa_is_set_IS_TUNNEL (sa))
     {
-      fib_protocol_t fproto = (sa->is_tunnel_ip6 ?
+      fib_protocol_t fproto = (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ?
 			       FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4);
       fib_prefix_t pfx = {
 	.fp_addr = sa->tunnel_dst_addr,
-	.fp_len = (sa->is_tunnel_ip6 ? 128 : 32),
+	.fp_len = (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? 128 : 32),
 	.fp_proto = fproto,
       };
       sa->tx_fib_index = fib_table_find (fproto, tx_table_id);
@@ -205,7 +206,7 @@ ipsec_sa_add (u32 id,
       ipsec_sa_stack (sa);
 
       /* generate header templates */
-      if (sa->is_tunnel_ip6)
+      if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa))
 	{
 	  sa->ip6_hdr.ip_version_traffic_class_and_flow_label = 0x60;
 	  sa->ip6_hdr.hop_limit = 254;
@@ -217,7 +218,7 @@ ipsec_sa_add (u32 id,
 	    sa->tunnel_dst_addr.ip6.as_u64[0];
 	  sa->ip6_hdr.dst_address.as_u64[1] =
 	    sa->tunnel_dst_addr.ip6.as_u64[1];
-	  if (sa->udp_encap)
+	  if (ipsec_sa_is_set_UDP_ENCAP (sa))
 	    sa->ip6_hdr.protocol = IP_PROTOCOL_UDP;
 	  else
 	    sa->ip6_hdr.protocol = IP_PROTOCOL_IPSEC_ESP;
@@ -229,7 +230,7 @@ ipsec_sa_add (u32 id,
 	  sa->ip4_hdr.src_address.as_u32 = sa->tunnel_src_addr.ip4.as_u32;
 	  sa->ip4_hdr.dst_address.as_u32 = sa->tunnel_dst_addr.ip4.as_u32;
 
-	  if (sa->udp_encap)
+	  if (ipsec_sa_is_set_UDP_ENCAP (sa))
 	    sa->ip4_hdr.protocol = IP_PROTOCOL_UDP;
 	  else
 	    sa->ip4_hdr.protocol = IP_PROTOCOL_IPSEC_ESP;
@@ -237,7 +238,7 @@ ipsec_sa_add (u32 id,
 	}
     }
 
-  if (sa->udp_encap)
+  if (ipsec_sa_is_set_UDP_ENCAP (sa))
     {
       sa->udp_hdr.src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
       sa->udp_hdr.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
@@ -277,7 +278,8 @@ ipsec_sa_del (u32 id)
   err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
   if (err)
     return VNET_API_ERROR_SYSCALL_ERROR_1;
-  if (sa->is_tunnel)
+
+  if (ipsec_sa_is_set_IS_TUNNEL (sa))
     {
       fib_entry_child_remove (sa->fib_entry_index, sa->sibling);
       fib_table_entry_special_remove
diff --git a/src/vnet/ipsec/ipsec_sa.h b/src/vnet/ipsec/ipsec_sa.h
index d3335a2d956..1cd215340f5 100644
--- a/src/vnet/ipsec/ipsec_sa.h
+++ b/src/vnet/ipsec/ipsec_sa.h
@@ -94,55 +94,83 @@ typedef enum ipsec_sad_flags_t_
 #define _(v, f, s) IPSEC_SA_FLAG_##f = v,
   foreach_ipsec_sa_flags
 #undef _
-} ipsec_sa_flags_t;
+} __attribute__ ((packed)) ipsec_sa_flags_t;
+
+STATIC_ASSERT (sizeof (ipsec_sa_flags_t) == 1, "IPSEC SA flags > 1 byte");
 
 typedef struct
 {
+  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
+
+  /* flags */
+  ipsec_sa_flags_t flags;
+
+  u8 crypto_iv_size;
+  u8 crypto_block_size;
+  u8 integ_trunc_size;
+  u32 spi;
+  u32 seq;
+  u32 seq_hi;
+  u32 last_seq;
+  u32 last_seq_hi;
+  u64 replay_window;
+
+  vnet_crypto_op_type_t crypto_enc_op_type;
+  vnet_crypto_op_type_t crypto_dec_op_type;
+  vnet_crypto_op_type_t integ_op_type;
+
+  dpo_id_t dpo[IPSEC_N_PROTOCOLS];
+
+  /* data accessed by dataplane code should be above this comment */
+    CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
+
+  union
+  {
+    ip4_header_t ip4_hdr;
+    ip6_header_t ip6_hdr;
+  };
+  udp_header_t udp_hdr;
+
+
   fib_node_t node;
   u32 id;
-  u32 spi;
   u32 stat_index;
   ipsec_protocol_t protocol;
 
   ipsec_crypto_alg_t crypto_alg;
   ipsec_key_t crypto_key;
-  u8 crypto_iv_size;
-  u8 crypto_block_size;
-  vnet_crypto_op_type_t crypto_enc_op_type;
-  vnet_crypto_op_type_t crypto_dec_op_type;
 
   ipsec_integ_alg_t integ_alg;
   ipsec_key_t integ_key;
-  vnet_crypto_op_type_t integ_op_type;
-  u8 integ_trunc_size;
 
-  u8 use_esn;
-  u8 use_anti_replay;
-
-  u8 is_tunnel;
-  u8 is_tunnel_ip6;
-  u8 udp_encap;
   ip46_address_t tunnel_src_addr;
   ip46_address_t tunnel_dst_addr;
-  ip4_header_t ip4_hdr;
-  ip6_header_t ip6_hdr;
-  udp_header_t udp_hdr;
 
   fib_node_index_t fib_entry_index;
   u32 sibling;
-  dpo_id_t dpo[IPSEC_N_PROTOCOLS];
 
   u32 tx_fib_index;
   u32 salt;
 
   /* runtime */
-  u32 seq;
-  u32 seq_hi;
-  u32 last_seq;
-  u32 last_seq_hi;
-  u64 replay_window;
 } ipsec_sa_t;
 
+STATIC_ASSERT_OFFSET_OF (ipsec_sa_t, cacheline1, CLIB_CACHE_LINE_BYTES);
+
+#define _(a,v,s)                                                        \
+  always_inline int                                                     \
+  ipsec_sa_is_set_##v (const ipsec_sa_t *sa) {                          \
+    return (sa->flags & IPSEC_SA_FLAG_##v);                             \
+  }
+foreach_ipsec_sa_flags
+#undef _
+#define _(a,v,s)                                                        \
+  always_inline int                                                     \
+  ipsec_sa_set_##v (ipsec_sa_t *sa) {                                   \
+    return (sa->flags |= IPSEC_SA_FLAG_##v);                            \
+  }
+  foreach_ipsec_sa_flags
+#undef _
 /**
  * @brief
  * SA packet & bytes counters