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/*
* Copyright (c) 2017-2019 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.
*/
#include <vnet/session/session_table.h>
#include <vnet/session/session.h>
/**
* Pool of session tables
*/
static session_table_t *lookup_tables;
session_table_t *
_get_session_tables (void)
{
return lookup_tables;
}
session_table_t *
session_table_alloc (void)
{
session_table_t *slt;
pool_get_aligned (lookup_tables, slt, CLIB_CACHE_LINE_BYTES);
clib_memset (slt, 0, sizeof (*slt));
return slt;
}
u32
session_table_index (session_table_t * slt)
{
return (slt - lookup_tables);
}
session_table_t *
session_table_get (u32 table_index)
{
if (pool_is_free_index (lookup_tables, table_index))
return 0;
return pool_elt_at_index (lookup_tables, table_index);
}
#define foreach_hash_table_parameter \
_(v4,session,buckets,20000) \
_(v4,session,memory,(64<<20)) \
_(v6,session,buckets,20000) \
_(v6,session,memory,(64<<20)) \
_(v4,halfopen,buckets,20000) \
_(v4,halfopen,memory,(64<<20)) \
_(v6,halfopen,buckets,20000) \
_(v6,halfopen,memory,(64<<20))
/**
* Initialize session table hash tables
*
* If vpp configured with set of table parameters it uses them,
* otherwise it uses defaults above.
*/
void
session_table_init (session_table_t * slt, u8 fib_proto)
{
u8 all = fib_proto > FIB_PROTOCOL_IP6 ? 1 : 0;
int i;
#define _(af,table,parm,value) \
u32 configured_##af##_##table##_table_##parm = value;
foreach_hash_table_parameter;
#undef _
#define _(af,table,parm,value) \
if (session_main.configured_##af##_##table##_table_##parm) \
configured_##af##_##table##_table_##parm = \
session_main.configured_##af##_##table##_table_##parm;
foreach_hash_table_parameter;
#undef _
if (fib_proto == FIB_PROTOCOL_IP4 || all)
{
clib_bihash_init2_args_16_8_t _a, *a = &_a;
memset (a, 0, sizeof (*a));
a->h = &slt->v4_session_hash;
a->name = "v4 session table";
a->nbuckets = configured_v4_session_table_buckets;
a->memory_size = configured_v4_session_table_memory;
a->dont_add_to_all_bihash_list = 1;
a->instantiate_immediately = 1;
clib_bihash_init2_16_8 (a);
memset (a, 0, sizeof (*a));
a->h = &slt->v4_half_open_hash;
a->name = "v4 half-open table";
a->nbuckets = configured_v4_halfopen_table_buckets;
a->memory_size = configured_v4_halfopen_table_memory;
a->dont_add_to_all_bihash_list = 1;
a->instantiate_immediately = 1;
clib_bihash_init2_16_8 (a);
}
if (fib_proto == FIB_PROTOCOL_IP6 || all)
{
clib_bihash_init2_args_48_8_t _a, *a = &_a;
memset (a, 0, sizeof (*a));
a->h = &slt->v6_session_hash;
a->name = "v6 session table";
a->nbuckets = configured_v6_session_table_buckets;
a->memory_size = configured_v6_session_table_memory;
a->dont_add_to_all_bihash_list = 1;
a->instantiate_immediately = 1;
clib_bihash_init2_48_8 (a);
memset (a, 0, sizeof (*a));
a->h = &slt->v6_half_open_hash;
a->name = "v6 half-open table";
a->nbuckets = configured_v6_halfopen_table_buckets;
a->memory_size = configured_v6_halfopen_table_memory;
a->dont_add_to_all_bihash_list = 1;
a->instantiate_immediately = 1;
clib_bihash_init2_48_8 (a);
}
vec_validate (slt->session_rules, TRANSPORT_N_PROTOS - 1);
for (i = 0; i < TRANSPORT_N_PROTOS; i++)
session_rules_table_init (&slt->session_rules[i]);
}
typedef struct _ip4_session_table_walk_ctx_t
{
ip4_session_table_walk_fn_t fn;
void *ctx;
} ip4_session_table_walk_ctx_t;
static int
ip4_session_table_walk_cb (clib_bihash_kv_16_8_t * kvp, void *arg)
{
ip4_session_table_walk_ctx_t *ctx = arg;
ctx->fn (kvp, ctx->ctx);
return (BIHASH_WALK_CONTINUE);
}
void
ip4_session_table_walk (clib_bihash_16_8_t * hash,
ip4_session_table_walk_fn_t fn, void *arg)
{
ip4_session_table_walk_ctx_t ctx = {
.fn = fn,
.ctx = arg,
};
clib_bihash_foreach_key_value_pair_16_8 (hash, ip4_session_table_walk_cb,
&ctx);
}
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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