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vpp/plugins/lb-plugin/lb/lb_test.c
Pierre Pfister 041eacc816 VPP-130: MagLev-like Load Balancer 
This plugin provides load balancing for VPP in a way that is largely inspired
from Google's MagLev: http://research.google.com/pubs/pub44824.html

More info in the README.md

Change-Id: I1223f495d5c2d5200808a398504119f2830337e9
Signed-off-by: Pierre Pfister <ppfister@cisco.com>
2016-08-11 14:05:40 +00:00

294 lines
8.6 KiB
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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.
*/
#include <vat/vat.h>
#include <vlibapi/api.h>
#include <vlibmemory/api.h>
#include <vlibsocket/api.h>
#include <vppinfra/error.h>
#include <lb/lb.h>
//TODO: Move that to vat/plugin_api.c
//////////////////////////
uword unformat_ip46_address (unformat_input_t * input, va_list * args)
{
ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
ip46_type_t type = va_arg (*args, ip46_type_t);
if ((type != IP46_TYPE_IP6) &&
unformat(input, "%U", unformat_ip4_address, &ip46->ip4)) {
ip46_address_mask_ip4(ip46);
return 1;
} else if ((type != IP46_TYPE_IP4) &&
unformat(input, "%U", unformat_ip6_address, &ip46->ip6)) {
return 1;
}
return 0;
}
uword unformat_ip46_prefix (unformat_input_t * input, va_list * args)
{
ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
u8 *len = va_arg (*args, u8 *);
ip46_type_t type = va_arg (*args, ip46_type_t);
u32 l;
if ((type != IP46_TYPE_IP6) && unformat(input, "%U/%u", unformat_ip4_address, &ip46->ip4, &l)) {
if (l > 32)
return 0;
*len = l + 96;
ip46->pad[0] = ip46->pad[1] = ip46->pad[2] = 0;
} else if ((type != IP46_TYPE_IP4) && unformat(input, "%U/%u", unformat_ip6_address, &ip46->ip6, &l)) {
if (l > 128)
return 0;
*len = l;
} else {
return 0;
}
return 1;
}
/////////////////////////
#define vl_msg_id(n,h) n,
typedef enum {
#include <lb/lb.api.h>
/* We'll want to know how many messages IDs we need... */
VL_MSG_FIRST_AVAILABLE,
} vl_msg_id_t;
#undef vl_msg_id
/* define message structures */
#define vl_typedefs
#include <lb/lb.api.h>
#undef vl_typedefs
/* declare message handlers for each api */
#define vl_endianfun /* define message structures */
#include <lb/lb.api.h>
#undef vl_endianfun
/* instantiate all the print functions we know about */
#define vl_print(handle, ...)
#define vl_printfun
#include <lb/lb.api.h>
#undef vl_printfun
/* Get the API version number. */
#define vl_api_version(n,v) static u32 api_version=(v);
#include <lb/lb.api.h>
#undef vl_api_version
typedef struct {
/* API message ID base */
u16 msg_id_base;
vat_main_t *vat_main;
} lb_test_main_t;
lb_test_main_t lb_test_main;
#define foreach_standard_reply_retval_handler \
_(lb_conf_reply) \
_(lb_add_del_vip_reply) \
_(lb_add_del_as_reply)
#define _(n) \
static void vl_api_##n##_t_handler \
(vl_api_##n##_t * mp) \
{ \
vat_main_t * vam = lb_test_main.vat_main; \
i32 retval = ntohl(mp->retval); \
if (vam->async_mode) { \
vam->async_errors += (retval < 0); \
} else { \
vam->retval = retval; \
vam->result_ready = 1; \
} \
}
foreach_standard_reply_retval_handler;
#undef _
/*
* Table of message reply handlers, must include boilerplate handlers
* we just generated
*/
#define foreach_vpe_api_reply_msg \
_(LB_CONF_REPLY, lb_conf_reply) \
_(LB_ADD_DEL_VIP_REPLY, lb_add_del_vip_reply) \
_(LB_ADD_DEL_AS_REPLY, lb_add_del_as_reply)
/* M: construct, but don't yet send a message */
#define M(T,t) \
do { \
vam->result_ready = 0; \
mp = vl_msg_api_alloc(sizeof(*mp)); \
memcpy (mp, &mps, sizeof (*mp)); \
mp->_vl_msg_id = ntohs (VL_API_##T + lbtm->msg_id_base); \
mp->client_index = vam->my_client_index; \
} while(0);
/* S: send a message */
#define S (vl_msg_api_send_shmem (vam->vl_input_queue, (u8 *)&mp))
/* W: wait for results, with timeout */
#define W \
do { \
timeout = vat_time_now (vam) + 1.0; \
\
while (vat_time_now (vam) < timeout) { \
if (vam->result_ready == 1) { \
return (vam->retval); \
} \
} \
return -99; \
} while(0);
static int api_lb_conf (vat_main_t * vam)
{
lb_test_main_t *lbtm = &lb_test_main;
unformat_input_t *i = vam->input;
f64 timeout;
vl_api_lb_conf_t mps, *mp;
if (!unformat(i, "%U %U %u %u",
unformat_ip4_address, &mps.ip4_src_address,
unformat_ip6_address, mps.ip6_src_address,
&mps.sticky_buckets_per_core,
&mps.flow_timeout)) {
errmsg ("invalid arguments\n");
return -99;
}
M(LB_CONF, lb_conf); S; W;
/* NOTREACHED */
return 0;
}
static int api_lb_add_del_vip (vat_main_t * vam)
{
lb_test_main_t *lbtm = &lb_test_main;
unformat_input_t * i = vam->input;
f64 timeout;
vl_api_lb_add_del_vip_t mps, *mp;
mps.is_del = 0;
mps.is_gre4 = 0;
if (!unformat(i, "%U",
unformat_ip46_prefix, mps.ip_prefix, &mps.prefix_length, IP46_TYPE_ANY)) {
errmsg ("invalid prefix\n");
return -99;
}
if (unformat(i, "gre4")) {
mps.is_gre4 = 1;
} else if (unformat(i, "gre6")) {
mps.is_gre4 = 0;
} else {
errmsg ("no encap\n");
return -99;
}
if (!unformat(i, "%d", &mps.new_flows_table_length)) {
errmsg ("no table lentgh\n");
return -99;
}
if (unformat(i, "del")) {
mps.is_del = 1;
}
M(LB_ADD_DEL_VIP, lb_add_del_vip); S; W;
/* NOTREACHED */
return 0;
}
static int api_lb_add_del_as (vat_main_t * vam)
{
lb_test_main_t *lbtm = &lb_test_main;
unformat_input_t * i = vam->input;
f64 timeout;
vl_api_lb_add_del_as_t mps, *mp;
mps.is_del = 0;
if (!unformat(i, "%U %U",
unformat_ip46_prefix, mps.vip_ip_prefix, &mps.vip_prefix_length, IP46_TYPE_ANY,
unformat_ip46_address, mps.as_address)) {
errmsg ("invalid prefix or address\n");
return -99;
}
if (unformat(i, "del")) {
mps.is_del = 1;
}
M(LB_ADD_DEL_AS, lb_add_del_as); S; W;
/* NOTREACHED */
return 0;
}
/*
* List of messages that the api test plugin sends,
* and that the data plane plugin processes
*/
#define foreach_vpe_api_msg \
_(lb_conf, "<ip4-src-addr> <ip6-src-address> <sticky_buckets_per_core> <flow_timeout>") \
_(lb_add_del_vip, "<ip-prefix> [gre4|gre6] <new_table_len> [del]") \
_(lb_add_del_as, "<vip-ip-prefix> <address> [del]")
void vat_api_hookup (vat_main_t *vam)
{
lb_test_main_t * lbtm = &lb_test_main;
/* Hook up handlers for replies from the data plane plug-in */
#define _(N,n) \
vl_msg_api_set_handlers((VL_API_##N + lbtm->msg_id_base), \
#n, \
vl_api_##n##_t_handler, \
vl_noop_handler, \
vl_api_##n##_t_endian, \
vl_api_##n##_t_print, \
sizeof(vl_api_##n##_t), 1);
foreach_vpe_api_reply_msg;
#undef _
/* API messages we can send */
#define _(n,h) hash_set_mem (vam->function_by_name, #n, api_##n);
foreach_vpe_api_msg;
#undef _
/* Help strings */
#define _(n,h) hash_set_mem (vam->help_by_name, #n, h);
foreach_vpe_api_msg;
#undef _
}
clib_error_t * vat_plugin_register (vat_main_t *vam)
{
lb_test_main_t * lbtm = &lb_test_main;
u8 * name;
lbtm->vat_main = vam;
/* Ask the vpp engine for the first assigned message-id */
name = format (0, "lb_%08x%c", api_version, 0);
lbtm->msg_id_base = vl_client_get_first_plugin_msg_id ((char *) name);
if (lbtm->msg_id_base != (u16) ~0)
vat_api_hookup (vam);
vec_free(name);
return 0;
}
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