From acd4c63e3c6e70ea3f58527d9bace7c0e38df719 Mon Sep 17 00:00:00 2001
From: Florin Coras <fcoras@cisco.com>
Date: Thu, 15 Jun 2017 14:33:48 -0700
Subject: Fix map-notify processing with multiple workers

Change-Id: Id160346ebf533ee5f55bd735803624a75ed997b9
Signed-off-by: Florin Coras <fcoras@cisco.com>
---
 src/vnet/lisp-cp/control.c | 39 +++++++++++++++++++++++++++++++++------
 src/vnet/lisp-cp/control.h | 18 +++++++++++-------
 2 files changed, 44 insertions(+), 13 deletions(-)

diff --git a/src/vnet/lisp-cp/control.c b/src/vnet/lisp-cp/control.c
index db78678d9c6..22b5c82c7ce 100644
--- a/src/vnet/lisp-cp/control.c
+++ b/src/vnet/lisp-cp/control.c
@@ -3352,14 +3352,14 @@ mapping_start_expiration_timer (lisp_cp_main_t * lcm, u32 mi,
 static void
 map_records_arg_free (map_records_arg_t * a)
 {
+  lisp_cp_main_t *lcm = vnet_lisp_cp_get_main ();
   mapping_t *m;
   vec_foreach (m, a->mappings)
   {
     vec_free (m->locators);
     gid_address_free (&m->eid);
   }
-
-  clib_mem_free (a);
+  pool_put (lcm->map_records_args_pool[vlib_get_thread_index ()], a);
 }
 
 void *
@@ -3420,7 +3420,7 @@ process_map_reply (map_records_arg_t * a)
   pool_put (lcm->pending_map_requests_pool, pmr);
 
 done:
-  map_records_arg_free (a);
+  a->is_free = 1;
   return 0;
 }
 
@@ -3471,7 +3471,7 @@ process_map_notify (map_records_arg_t * a)
       return;
     }
 
-  map_records_arg_free (a);
+  a->is_free = 1;
   hash_unset (lcm->map_register_messages_by_nonce, a->nonce);
 }
 
@@ -3556,6 +3556,24 @@ parse_map_records (vlib_buffer_t * b, map_records_arg_t * a, u8 count)
   return 0;
 }
 
+static map_records_arg_t *
+map_record_args_get ()
+{
+  lisp_cp_main_t *lcm = vnet_lisp_cp_get_main ();
+  map_records_arg_t *rec;
+
+  /* Cleanup first */
+  /* *INDENT-OFF* */
+  pool_foreach (rec, lcm->map_records_args_pool[vlib_get_thread_index()], ({
+    if (rec->is_free)
+      map_records_arg_free (rec);
+  }));
+  /* *INDENT-ON* */
+
+  pool_get (lcm->map_records_args_pool[vlib_get_thread_index ()], rec);
+  return rec;
+}
+
 static map_records_arg_t *
 parse_map_notify (vlib_buffer_t * b)
 {
@@ -3567,8 +3585,9 @@ parse_map_notify (vlib_buffer_t * b)
   gid_address_t deid;
   u16 auth_data_len = 0;
   u8 record_count;
-  map_records_arg_t *a = clib_mem_alloc (sizeof (*a));
+  map_records_arg_t *a;
 
+  a = map_record_args_get ();
   memset (a, 0, sizeof (*a));
   mnotif_hdr = vlib_buffer_get_current (b);
   vlib_buffer_pull (b, sizeof (*mnotif_hdr));
@@ -3791,8 +3810,11 @@ parse_map_reply (vlib_buffer_t * b)
   u32 i, len = 0;
   mapping_t m;
   map_reply_hdr_t *mrep_hdr;
-  map_records_arg_t *a = clib_mem_alloc (sizeof (*a));
+  map_records_arg_t *a;
+
+  a = map_record_args_get ();
   memset (a, 0, sizeof (*a));
+
   locator_t *locators;
 
   mrep_hdr = vlib_buffer_get_current (b);
@@ -3948,6 +3970,8 @@ lisp_cp_init (vlib_main_t * vm)
 {
   lisp_cp_main_t *lcm = vnet_lisp_cp_get_main ();
   clib_error_t *error = 0;
+  vlib_thread_main_t *vtm = vlib_get_thread_main ();
+  u32 num_threads;
 
   if ((error = vlib_call_init_function (vm, lisp_gpe_init)))
     return error;
@@ -3965,6 +3989,9 @@ lisp_cp_init (vlib_main_t * vm)
   lcm->do_map_resolver_election = 1;
   lcm->map_request_mode = MR_MODE_DST_ONLY;
 
+  num_threads = 1 /* main thread */  + vtm->n_threads;
+  vec_validate (lcm->map_records_args_pool, num_threads - 1);
+
   /* default vrf mapped to vni 0 */
   hash_set (lcm->table_id_by_vni, 0, 0);
   hash_set (lcm->vni_by_table_id, 0, 0);
diff --git a/src/vnet/lisp-cp/control.h b/src/vnet/lisp-cp/control.h
index ad90b5269ff..cf2eb6ef453 100644
--- a/src/vnet/lisp-cp/control.h
+++ b/src/vnet/lisp-cp/control.h
@@ -124,6 +124,14 @@ typedef struct
   u32 bd;
 } lisp_l2_arp_key_t;
 
+typedef struct
+{
+  u64 nonce;
+  u8 is_rloc_probe;
+  mapping_t *mappings;
+  volatile u8 is_free;
+} map_records_arg_t;
+
 typedef struct
 {
   u32 flags;
@@ -226,6 +234,9 @@ typedef struct
   /* timing wheel for mappping timeouts */
   timing_wheel_t wheel;
 
+  /** Per thread pool of records shared with thread0 */
+  map_records_arg_t **map_records_args_pool;
+
   /* commodity */
   ip4_main_t *im4;
   ip6_main_t *im6;
@@ -288,13 +299,6 @@ typedef struct
   u8 key_id;
 } vnet_lisp_add_del_mapping_args_t;
 
-typedef struct
-{
-  u64 nonce;
-  u8 is_rloc_probe;
-  mapping_t *mappings;
-} map_records_arg_t;
-
 int
 vnet_lisp_map_cache_add_del (vnet_lisp_add_del_mapping_args_t * a,
 			     u32 * map_index);
-- 
cgit 1.2.3-korg