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authorFlorin Coras <fcoras@cisco.com>2021-05-07 19:39:43 -0700
committerFlorin Coras <florin.coras@gmail.com>2021-05-10 20:53:32 +0000
commitea72764204dac0a1ab6412bc27b758faead2ca10 (patch)
treed22e849e0e0a84b11c42373c1b97fb6b715d3098 /src/vnet/session/application.h
parente2272ac27c31b8cf7ecf0ff8d4244f90034a09f4 (diff)
session: use half-open sessions for vc establishment
Use half-open sessions to track virtual circuit connection establishment. These sesssions can only be allocated and freed by the thread that allocates half-open connections (main). Consequently, they can only be freed on half-open cleanup notifications from transports. Goal is to simplify state tracking within the session layer but it's also a first step towards allowing builtin apps to track and cleanup outstanding connects. Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I8a535906d13eb7f8966deb82333839de80f8049f
Diffstat (limited to 'src/vnet/session/application.h')
-rw-r--r--src/vnet/session/application.h13
1 files changed, 4 insertions, 9 deletions
diff --git a/src/vnet/session/application.h b/src/vnet/session/application.h
index a8ddfec07f5..5beb813655b 100644
--- a/src/vnet/session/application.h
+++ b/src/vnet/session/application.h
@@ -61,8 +61,8 @@ typedef struct app_worker_
u8 app_is_builtin;
- /** Per transport proto hash tables of half-open connection handles */
- uword **half_open_table;
+ /** Pool of half-open session handles. Tracked in case worker detaches */
+ session_handle_t *half_open_table;
/** Protects detached seg managers */
clib_spinlock_t detached_seg_managers_lock;
@@ -313,13 +313,8 @@ int app_worker_accept_notify (app_worker_t * app_wrk, session_t * s);
int app_worker_init_connected (app_worker_t * app_wrk, session_t * s);
int app_worker_connect_notify (app_worker_t * app_wrk, session_t * s,
session_error_t err, u32 opaque);
-int app_worker_add_half_open (app_worker_t * app_wrk, transport_proto_t tp,
- session_handle_t ho_handle,
- session_handle_t wrk_handle);
-int app_worker_del_half_open (app_worker_t * app_wrk, transport_proto_t tp,
- session_handle_t ho_handle);
-u64 app_worker_lookup_half_open (app_worker_t * app_wrk, transport_proto_t tp,
- session_handle_t ho_handle);
+int app_worker_add_half_open (app_worker_t *app_wrk, session_handle_t sh);
+int app_worker_del_half_open (app_worker_t *app_wrk, u32 ho_index);
int app_worker_close_notify (app_worker_t * app_wrk, session_t * s);
int app_worker_transport_closed_notify (app_worker_t * app_wrk,
session_t * s);
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/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#undef BIHASH_TYPE
#undef BIHASH_KVP_PER_PAGE
#undef BIHASH_32_64_SVM
#undef BIHASH_ENABLE_STATS
#undef BIHASH_KVP_AT_BUCKET_LEVEL
#undef BIHASH_LAZY_INSTANTIATE
#undef BIHASH_BUCKET_PREFETCH_CACHE_LINES

#define BIHASH_TYPE			   _40_56
#define BIHASH_KVP_PER_PAGE 2
#define BIHASH_KVP_AT_BUCKET_LEVEL 1
#define BIHASH_LAZY_INSTANTIATE 1
#define BIHASH_BUCKET_PREFETCH_CACHE_LINES 2

#ifndef __included_bihash_40_56_h__
#define __included_bihash_40_56_h__

#include <vppinfra/crc32.h>
#include <vppinfra/heap.h>
#include <vppinfra/format.h>
#include <vppinfra/pool.h>
#include <vppinfra/xxhash.h>

typedef struct
{
  u64 key[5];
  u64 value[7];
} clib_bihash_kv_40_56_t;

static inline int
clib_bihash_is_free_40_56 (const clib_bihash_kv_40_56_t *v)
{
  /* Free values are clib_memset to 0xff, check a bit... */
  if (v->key[0] == ~0ULL && v->value[0] == ~0ULL)
    return 1;
  return 0;
}

static inline u64
clib_bihash_hash_40_56 (const clib_bihash_kv_40_56_t *v)
{
#ifdef clib_crc32c_uses_intrinsics
  return clib_crc32c ((u8 *) v->key, 40);
#else
  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4];
  return clib_xxhash (tmp);
#endif
}

static inline u8 *
format_bihash_kvp_40_56 (u8 *s, va_list *args)
{
  clib_bihash_kv_40_56_t *v = va_arg (*args, clib_bihash_kv_40_56_t *);

  s = format (s,
	      "key %llu %llu %llu %llu %llu"
	      "value %llu %llu %llu %llu %llu %llu %llu",
	      v->key[0], v->key[1], v->key[2], v->key[3], v->key[4],
	      v->value[0], v->value[1], v->value[2], v->value[3], v->value[4],
	      v->value[5], v->value[6]);
  return s;
}

static inline int
clib_bihash_key_compare_40_56 (u64 *a, u64 *b)
{
#if defined (CLIB_HAVE_VEC512)
  u64x8 v;
  v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
  return (u64x8_is_zero_mask (v) & 0x1f) == 0;
#elif defined (CLIB_HAVE_VEC256)
  u64x4 v = { a[4] ^ b[4], 0, 0, 0 };
  v |= u64x4_load_unaligned (a) ^ u64x4_load_unaligned (b);
  return u64x4_is_all_zero (v);
#elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
  u64x2 v = { a[4] ^ b[4], 0 };
  v |= u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
  v |= u64x2_load_unaligned (a + 2) ^ u64x2_load_unaligned (b + 2);
  return u64x2_is_all_zero (v);
#else
  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
	  | (a[4] ^ b[4])) == 0;
#endif
}

#undef __included_bihash_template_h__
#include <vppinfra/bihash_template.h>

typedef clib_bihash_kv_40_56_t cnat_bihash_kv_t;
typedef clib_bihash_40_56_t cnat_bihash_t;

#define cnat_bihash_search_i2_hash  clib_bihash_search_inline_2_with_hash_40_56
#define cnat_bihash_search_i2	    clib_bihash_search_inline_2_40_56
#define cnat_bihash_add_del	    clib_bihash_add_del_40_56
#define cnat_bihash_hash	    clib_bihash_hash_40_56
#define cnat_bihash_prefetch_bucket clib_bihash_prefetch_bucket_40_56
#define cnat_bihash_prefetch_data   clib_bihash_prefetch_data_40_56

#endif /* __included_bihash_40_56_h__ */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */