if ENABLE_ila_PLUGIN
SUBDIRS += ila-plugin
endif
+
+if ENABLE_lb_PLUGIN
+SUBDIRS += lb-plugin
+endif
PLUGIN_ENABLED(ioam)
PLUGIN_ENABLED(snat)
PLUGIN_ENABLED(ila)
+PLUGIN_ENABLED(lb)
# Disabled plugins, require --enable-XXX-plugin
PLUGIN_DISABLED(vcgn)
--- /dev/null
+# Copyright (c) 2016 Cisco Systems, Inc.
+# 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.
+
+AUTOMAKE_OPTIONS = foreign subdir-objects
+
+AM_CFLAGS = -Wall
+AM_LDFLAGS = -module -shared -avoid-version
+
+vppapitestpluginsdir = ${libdir}/vpp_api_test_plugins
+vpppluginsdir = ${libdir}/vpp_plugins
+
+vppapitestplugins_LTLIBRARIES = lb_test_plugin.la
+vppplugins_LTLIBRARIES = lb_plugin.la
+
+lb_plugin_la_SOURCES = lb/lb.c lb/node.c lb/cli.c lb/util.c lb/refcount.c lb/api.c
+
+SUFFIXES = .api.h .api
+
+%.api.h: %.api
+ mkdir -p `dirname $@` ; \
+ $(CC) $(CPPFLAGS) -E -P -C -x c $^ \
+ | vppapigen --input - --output $@ --show-name $@
+
+noinst_HEADERS = lb/lb.h lb/util.h lb/refcount.h lb/lbhash.h lb/lb.api.h
+
+lb_test_plugin_la_SOURCES = \
+ lb/lb_test.c lb/lb_plugin.api.h
+
+# Remove *.la files
+install-data-hook:
+ @(cd $(vpppluginsdir) && $(RM) $(vppplugins_LTLIBRARIES))
+ @(cd $(vppapitestpluginsdir) && $(RM) $(vppapitestplugins_LTLIBRARIES))
--- /dev/null
+# Load Balancer plugin for VPP
+
+## Version
+
+The load balancer plugin is currently in *beta* version.
+Both CLIs and APIs are subject to *heavy* changes.
+Wich also means feedback is really welcome regarding features, apis, etc...
+
+## Overview
+
+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
+
+The load balancer is configured with a set of Virtual IPs (VIP, which can be
+prefixes), and for each VIP, with a set of Application Server addresses (ASs).
+
+Traffic received for a given VIP (or VIP prefix) is tunneled using GRE towards
+the different ASs in a way that (tries to) ensure that a given session will
+always be tunneled to the same AS.
+
+Both VIPs or ASs can be IPv4 or IPv6, but for a given VIP, all ASs must be using
+the same encap. type (i.e. IPv4+GRE or IPv6+GRE). Meaning that for a given VIP,
+all AS addresses must be of the same family.
+
+## Performances
+
+The load balancer has been tested up to 1 millions flows and still forwards more
+than 3Mpps per core in such circumstances.
+Although 3Mpps seems already good, it is likely that performances will be improved
+in next versions.
+
+## Configuration
+
+### Global LB parameters
+
+The load balancer needs to be configured with some parameters:
+
+ lb conf [ip4-src-address <addr>] [ip6-src-address <addr>]
+ [buckets <n>] [timeout <s>]
+
+ip4-src-address: the source address used to send encap. packets using IPv4.
+
+ip6-src-address: the source address used to send encap. packets using IPv6.
+
+buckets: the *per-thread* established-connexions-table number of buckets.
+
+timeout: the number of seconds a connection will remain in the
+ established-connexions-table while no packet for this flow
+ is received.
+
+
+### Configure the VIPs
+
+ lb vip <prefix> [encap (gre6|gre4)] [new_len <n>] [del]
+
+new_len is the size of the new-connection-table. It should be 1 or 2 orders of
+magnitude bigger than the number of ASs for the VIP in order to ensure a good
+load balancing.
+
+Examples:
+
+ lb vip 2002::/16 encap gre6 new_len 1024
+ lb vip 2003::/16 encap gre4 new_len 2048
+ lb vip 80.0.0.0/8 encap gre6 new_len 16
+ lb vip 90.0.0.0/8 encap gre4 new_len 1024
+
+### Configure the ASs (for each VIP)
+
+ lb as <vip-prefix> [<address> [<address> [...]]] [del]
+
+You can add (or delete) as many ASs at a time (for a single VIP).
+Note that the AS address family must correspond to the VIP encap. IP family.
+
+Examples:
+
+ lb as 2002::/16 2001::2 2001::3 2001::4
+ lb as 2003::/16 10.0.0.1 10.0.0.2
+ lb as 80.0.0.0/8 2001::2
+ lb as 90.0.0.0/8 10.0.0.1
+
+
+
+## Monitoring
+
+The plugin provides quite a bunch of counters and information.
+These are still subject to quite significant changes.
+
+ show lb
+ show lb vip
+ show lb vip verbose
+
+ show node counters
+
+
+## Design notes
+
+### Multi-Threading
+
+MagLev is a distributed system which pseudo-randomly generates a
+new-connections-table based on AS names such that each server configured with
+the same set of ASs ends up with the same table. Connection stickyness is then
+ensured with an established-connections-table. Using ECMP, it is assumed (but
+not relied on) that servers will mostly receive traffic for different flows.
+
+This implementation pushes the parallelism a little bit further by using
+one established-connections table per thread. This is equivalent to assuming
+that RSS will make a job similar to ECMP, and is pretty useful as threads don't
+need to get a lock in order to write in the table.
+
+### Hash Table
+
+A load balancer requires an efficient read and write hash table. The hash table
+used by ip6-forward is very read-efficient, but not so much for writing. In
+addition, it is not a big deal if writing into the hash table fails (again,
+MagLev uses a flow table but does not heaviliy relies on it).
+
+The plugin therefore uses a very specific (and stupid) hash table.
+ - Fixed (and power of 2) number of buckets (configured at runtime)
+ - Fixed (and power of 2) elements per buckets (configured at compilation time)
+
+### Reference counting
+
+When an AS is removed, there is two possible ways to react.
+ - Keep using the AS for established connections
+ - Change AS for established connections (likely to cause error for TCP)
+
+In the first case, although an AS is removed from the configuration, its
+associated state needs to stay around as long as it is used by at least one
+thread.
+
+In order to avoid locks, a specific reference counter is used. The design is quite
+similar to clib counters but:
+ - It is possible to decrease the value
+ - Summing will not zero the per-thread counters
+ - Only the thread can reallocate its own counters vector (to avoid concurrency issues)
+
+This reference counter is lock free, but reading a count of 0 does not mean
+the value can be freed unless it is ensured by *other* means that no other thread
+is concurrently referencing the object. In the case of this plugin, it is assumed
+that no concurrent event will take place after a few seconds.
+
--- /dev/null
+AC_INIT(lb_plugin, 1.0)
+AM_INIT_AUTOMAKE
+AM_SILENT_RULES([yes])
+AC_PREFIX_DEFAULT([/usr])
+
+AC_PROG_LIBTOOL
+AC_PROG_CC
+
+AC_OUTPUT([Makefile])
--- /dev/null
+/*
+ * 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 <lb/lb.h>
+
+#include <vppinfra/byte_order.h>
+#include <vlibapi/api.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibsocket/api.h>
+
+#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
+
+/* define generated endian-swappers */
+#define vl_endianfun
+#include <lb/lb.api.h>
+#undef vl_endianfun
+
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+
+/* 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
+
+/* Macro to finish up custom dump fns */
+#define FINISH \
+ vec_add1 (s, 0); \
+ vl_print (handle, (char *)s); \
+ vec_free (s); \
+ return handle;
+
+/*
+ * A handy macro to set up a message reply.
+ * Assumes that the following variables are available:
+ * mp - pointer to request message
+ * rmp - pointer to reply message type
+ * rv - return value
+ */
+
+#define REPLY_MACRO(t) \
+do { \
+ unix_shared_memory_queue_t * q = \
+ vl_api_client_index_to_input_queue (mp->client_index); \
+ if (!q) \
+ return; \
+ \
+ rmp = vl_msg_api_alloc (sizeof (*rmp)); \
+ rmp->_vl_msg_id = ntohs((t)+lbm->msg_id_base); \
+ rmp->context = mp->context; \
+ rmp->retval = ntohl(rv); \
+ \
+ vl_msg_api_send_shmem (q, (u8 *)&rmp); \
+} while(0);
+
+static void
+vl_api_lb_conf_t_handler
+(vl_api_lb_conf_t * mp)
+{
+ lb_main_t *lbm = &lb_main;
+ vl_api_lb_conf_reply_t * rmp;
+ int rv = 0;
+
+ rv = lb_conf((ip4_address_t *)&mp->ip4_src_address,
+ (ip6_address_t *)mp->ip6_src_address,
+ mp->sticky_buckets_per_core,
+ mp->flow_timeout);
+
+ REPLY_MACRO (VL_API_LB_CONF_REPLY);
+}
+
+static void *vl_api_lb_conf_t_print
+(vl_api_lb_conf_t *mp, void * handle)
+{
+ u8 * s;
+ s = format (0, "SCRIPT: lb_conf ");
+ s = format (s, "%U ", format_ip4_address, (ip4_address_t *)&mp->ip4_src_address);
+ s = format (s, "%U ", format_ip6_address, (ip6_address_t *)mp->ip6_src_address);
+ s = format (s, "%u ", mp->sticky_buckets_per_core);
+ s = format (s, "%u ", mp->flow_timeout);
+ FINISH;
+}
+
+
+static void
+vl_api_lb_add_del_vip_t_handler
+(vl_api_lb_add_del_vip_t * mp)
+{
+ lb_main_t *lbm = &lb_main;
+ vl_api_lb_conf_reply_t * rmp;
+ int rv = 0;
+ ip46_address_t prefix;
+ memcpy(&prefix.ip6, mp->ip_prefix, sizeof(prefix.ip6));
+
+ if (mp->is_del) {
+ u32 vip_index;
+ if (!(rv = lb_vip_find_index(&prefix, mp->prefix_length, &vip_index)))
+ rv = lb_vip_del(vip_index);
+ } else {
+ u32 vip_index;
+ lb_vip_type_t type;
+ if (ip46_prefix_is_ip4(&prefix, mp->prefix_length)) {
+ type = mp->is_gre4?LB_VIP_TYPE_IP4_GRE4:LB_VIP_TYPE_IP4_GRE6;
+ } else {
+ type = mp->is_gre4?LB_VIP_TYPE_IP6_GRE4:LB_VIP_TYPE_IP6_GRE6;
+ }
+
+ rv = lb_vip_add(&prefix, mp->prefix_length, type,
+ mp->new_flows_table_length, &vip_index);
+ }
+ REPLY_MACRO (VL_API_LB_CONF_REPLY);
+}
+
+static void *vl_api_lb_add_del_vip_t_print
+(vl_api_lb_add_del_vip_t *mp, void * handle)
+{
+ u8 * s;
+ s = format (0, "SCRIPT: lb_add_del_vip ");
+ s = format (s, "%U ", format_ip46_prefix,
+ (ip46_address_t *)mp->ip_prefix, mp->prefix_length, IP46_TYPE_ANY);
+ s = format (s, "%s ", mp->is_gre4?"gre4":"gre6");
+ s = format (s, "%u ", mp->new_flows_table_length);
+ s = format (s, "%s ", mp->is_del?"del":"add");
+ FINISH;
+}
+
+static void
+vl_api_lb_add_del_as_t_handler
+(vl_api_lb_add_del_as_t * mp)
+{
+ lb_main_t *lbm = &lb_main;
+ vl_api_lb_conf_reply_t * rmp;
+ int rv = 0;
+ u32 vip_index;
+ if ((rv = lb_vip_find_index((ip46_address_t *)mp->vip_ip_prefix,
+ mp->vip_prefix_length, &vip_index)))
+ goto done;
+
+ if (mp->is_del)
+ rv = lb_vip_del_ass(vip_index, (ip46_address_t *)mp->as_address, 1);
+ else
+ rv = lb_vip_add_ass(vip_index, (ip46_address_t *)mp->as_address, 1);
+
+done:
+ REPLY_MACRO (VL_API_LB_CONF_REPLY);
+}
+
+static void *vl_api_lb_add_del_as_t_print
+(vl_api_lb_add_del_as_t *mp, void * handle)
+{
+ u8 * s;
+ s = format (0, "SCRIPT: lb_add_del_as ");
+ s = format (s, "%U ", format_ip46_prefix,
+ (ip46_address_t *)mp->vip_ip_prefix, mp->vip_prefix_length, IP46_TYPE_ANY);
+ s = format (s, "%U ", format_ip46_address,
+ (ip46_address_t *)mp->as_address, IP46_TYPE_ANY);
+ s = format (s, "%s ", mp->is_del?"del":"add");
+ FINISH;
+}
+
+/* List of message types that this plugin understands */
+#define foreach_lb_plugin_api_msg \
+_(LB_CONF, lb_conf) \
+_(LB_ADD_DEL_VIP, lb_add_del_vip) \
+_(LB_ADD_DEL_AS, lb_add_del_as)
+
+static clib_error_t * lb_api_init (vlib_main_t * vm)
+{
+ lb_main_t *lbm = &lb_main;
+ u8 *name = format (0, "lb_%08x%c", api_version, 0);
+ lbm->msg_id_base = vl_msg_api_get_msg_ids
+ ((char *) name, VL_MSG_FIRST_AVAILABLE);
+
+#define _(N,n) \
+ vl_msg_api_set_handlers((VL_API_##N + lbm->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_lb_plugin_api_msg;
+#undef _
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (lb_api_init);
--- /dev/null
+/*
+ * 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 <lb/lb.h>
+#include <lb/util.h>
+
+static clib_error_t *
+lb_vip_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip46_address_t prefix;
+ u8 plen;
+ u32 new_len = 1024;
+ u8 del = 0;
+ int ret;
+ u32 gre4 = 0;
+ lb_vip_type_t type;
+
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ if (!unformat(line_input, "%U", unformat_ip46_prefix, &prefix, &plen, IP46_TYPE_ANY, &plen))
+ return clib_error_return (0, "invalid vip prefix: '%U'",
+ format_unformat_error, line_input);
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat(line_input, "new_len %d", &new_len))
+ ;
+ else if (unformat(line_input, "del"))
+ del = 1;
+ else if (unformat(line_input, "encap gre4"))
+ gre4 = 1;
+ else if (unformat(line_input, "encap gre6"))
+ gre4 = 0;
+ else
+ return clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ }
+
+ unformat_free (line_input);
+
+
+ if (ip46_prefix_is_ip4(&prefix, plen)) {
+ type = (gre4)?LB_VIP_TYPE_IP4_GRE4:LB_VIP_TYPE_IP4_GRE6;
+ } else {
+ type = (gre4)?LB_VIP_TYPE_IP6_GRE4:LB_VIP_TYPE_IP6_GRE6;
+ }
+
+ lb_garbage_collection();
+
+ u32 index;
+ if (!del) {
+ if ((ret = lb_vip_add(&prefix, plen, type, new_len, &index))) {
+ return clib_error_return (0, "lb_vip_add error %d", ret);
+ } else {
+ vlib_cli_output(vm, "lb_vip_add ok %d", index);
+ }
+ } else {
+ if ((ret = lb_vip_find_index(&prefix, plen, &index)))
+ return clib_error_return (0, "lb_vip_find_index error %d", ret);
+ else if ((ret = lb_vip_del(index)))
+ return clib_error_return (0, "lb_vip_del error %d", ret);
+ }
+ return NULL;
+}
+
+VLIB_CLI_COMMAND (lb_vip_command, static) =
+{
+ .path = "lb vip",
+ .short_help = "lb vip <prefix> [encap (gre6|gre4)] [new_len <n>] [del]",
+ .function = lb_vip_command_fn,
+};
+
+static clib_error_t *
+lb_as_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip46_address_t vip_prefix, as_addr;
+ u8 vip_plen;
+ ip46_address_t *as_array = 0;
+ u32 vip_index;
+ u8 del = 0;
+ int ret;
+
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ if (!unformat(line_input, "%U", unformat_ip46_prefix, &vip_prefix, &vip_plen, IP46_TYPE_ANY))
+ return clib_error_return (0, "invalid as address: '%U'",
+ format_unformat_error, line_input);
+
+ if ((ret = lb_vip_find_index(&vip_prefix, vip_plen, &vip_index)))
+ return clib_error_return (0, "lb_vip_find_index error %d", ret);
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat(line_input, "%U", unformat_ip46_address, &as_addr, IP46_TYPE_ANY)) {
+ vec_add1(as_array, as_addr);
+ } else if (unformat(line_input, "del")) {
+ del = 1;
+ } else {
+ vec_free(as_array);
+ return clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ }
+ }
+
+ if (!vec_len(as_array)) {
+ vec_free(as_array);
+ return clib_error_return (0, "No AS address provided");
+ }
+
+ lb_garbage_collection();
+ clib_warning("vip index is %d", vip_index);
+
+ if (del) {
+ if ((ret = lb_vip_del_ass(vip_index, as_array, vec_len(as_array)))) {
+ vec_free(as_array);
+ return clib_error_return (0, "lb_vip_del_ass error %d", ret);
+ }
+ } else {
+ if ((ret = lb_vip_add_ass(vip_index, as_array, vec_len(as_array)))) {
+ vec_free(as_array);
+ return clib_error_return (0, "lb_vip_add_ass error %d", ret);
+ }
+ }
+
+ vec_free(as_array);
+ return 0;
+}
+
+VLIB_CLI_COMMAND (lb_as_command, static) =
+{
+ .path = "lb as",
+ .short_help = "lb as <vip-prefix> [<address> [<address> [...]]] [del]",
+ .function = lb_as_command_fn,
+};
+
+static clib_error_t *
+lb_conf_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ lb_main_t *lbm = &lb_main;
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip4_address_t ip4 = lbm->ip4_src_address;
+ ip6_address_t ip6 = lbm->ip6_src_address;
+ u32 per_cpu_sticky_buckets = lbm->per_cpu_sticky_buckets;
+ u32 per_cpu_sticky_buckets_log2 = 0;
+ u32 flow_timeout = lbm->flow_timeout;
+ int ret;
+
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat(line_input, "ip4-src-address %U", unformat_ip4_address, &ip4))
+ ;
+ else if (unformat(line_input, "ip6-src-address %U", unformat_ip6_address, &ip6))
+ ;
+ else if (unformat(line_input, "buckets %d", &per_cpu_sticky_buckets))
+ ;
+ else if (unformat(line_input, "buckets-log2 %d", &per_cpu_sticky_buckets_log2)) {
+ if (per_cpu_sticky_buckets_log2 >= 32)
+ return clib_error_return (0, "buckets-log2 value is too high");
+ per_cpu_sticky_buckets = 1 << per_cpu_sticky_buckets_log2;
+ } else if (unformat(line_input, "timeout %d", &flow_timeout))
+ ;
+ else
+ return clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ }
+
+ unformat_free (line_input);
+
+ lb_garbage_collection();
+
+ if ((ret = lb_conf(&ip4, &ip6, per_cpu_sticky_buckets, flow_timeout)))
+ return clib_error_return (0, "lb_conf error %d", ret);
+
+ return NULL;
+}
+
+VLIB_CLI_COMMAND (lb_conf_command, static) =
+{
+ .path = "lb conf",
+ .short_help = "lb conf [ip4-src-address <addr>] [ip6-src-address <addr>] [buckets <n>] [timeout <s>]",
+ .function = lb_conf_command_fn,
+};
+
+static clib_error_t *
+lb_show_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vlib_cli_output(vm, "%U", format_lb_main);
+ return NULL;
+}
+
+
+VLIB_CLI_COMMAND (lb_show_command, static) =
+{
+ .path = "show lb",
+ .short_help = "show lb",
+ .function = lb_show_command_fn,
+};
+
+static clib_error_t *
+lb_show_vips_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t line_input;
+ lb_main_t *lbm = &lb_main;
+ lb_vip_t *vip;
+ u8 verbose = 0;
+
+ if (!unformat_user (input, unformat_line_input, &line_input))
+ return 0;
+
+ if (unformat(&line_input, "verbose"))
+ verbose = 1;
+
+ pool_foreach(vip, lbm->vips, {
+ vlib_cli_output(vm, "%U\n", verbose?format_lb_vip_detailed:format_lb_vip, vip);
+ });
+
+ unformat_free (&line_input);
+ return NULL;
+}
+
+VLIB_CLI_COMMAND (lb_show_vips_command, static) =
+{
+ .path = "show lb vips",
+ .short_help = "show lb vips [verbose]",
+ .function = lb_show_vips_command_fn,
+};
--- /dev/null
+/** \brief Configure Load-Balancer global parameters
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param ip4_src_address - IPv4 address to be used as source for IPv4 GRE traffic.
+ @param ip6_src_address - IPv6 address to be used as source for IPv6 GRE traffic.
+ @param n_sticky_buckets - Number of buckets *per worker thread* in the
+ established flow table (must be power of 2).
+ @param flow_timeout - Time in seconds after which, if no packet is received
+ for a given flow, the flow is removed from the established flow table.
+*/
+define lb_conf
+{
+ u32 client_index;
+ u32 context;
+ u32 ip4_src_address;
+ u8 ip6_src_address[16];
+ u32 sticky_buckets_per_core;
+ u32 flow_timeout;
+};
+
+define lb_conf_reply {
+ u32 context;
+ i32 retval;
+};
+
+/** \brief Add a virtual address (or prefix)
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param ip_prefix - IP address (IPv4 in lower order 32 bits).
+ @param prefix_length - IP prefix length (96 + 'IPv4 prefix length' for IPv4).
+ @param is_gre4 - Encap is ip4 GRE (ip6 GRE otherwise).
+ @param new_flows_table_length - Size of the new connections flow table used
+ for this VIP (must be power of 2).
+ @param is_del - The VIP should be removed.
+*/
+define lb_add_del_vip {
+ u32 client_index;
+ u32 context;
+ u8 ip_prefix[16];
+ u8 prefix_length;
+ u8 is_gre4;
+ u32 new_flows_table_length;
+ u8 is_del;
+};
+
+define lb_add_del_vip_reply {
+ u32 context;
+ i32 retval;
+};
+
+/** \brief Add an application server for a given VIP
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param vip_ip_prefix - VIP IP address (IPv4 in lower order 32 bits).
+ @param vip_ip_prefix - VIP IP prefix length (96 + 'IPv4 prefix length' for IPv4).
+ @param as_address - The application server address (IPv4 in lower order 32 bits).
+ @param is_del - The AS should be removed.
+*/
+define lb_add_del_as {
+ u32 client_index;
+ u32 context;
+ u8 vip_ip_prefix[16];
+ u8 vip_prefix_length;
+ u8 as_address[16];
+ u8 is_del;
+};
+
+define lb_add_del_as_reply {
+ u32 context;
+ i32 retval;
+};
--- /dev/null
+/*
+ * 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 <lb/lb.h>
+#include <vnet/plugin/plugin.h>
+#include <vnet/api_errno.h>
+
+//GC runs at most once every so many seconds
+#define LB_GARBAGE_RUN 60
+
+//After so many seconds. It is assumed that inter-core race condition will not occur.
+#define LB_CONCURRENCY_TIMEOUT 10
+
+lb_main_t lb_main;
+
+#define lb_get_writer_lock() do {} while(__sync_lock_test_and_set (lb_main.writer_lock, 1))
+#define lb_put_writer_lock() lb_main.writer_lock[0] = 0
+
+u32 lb_hash_time_now(vlib_main_t * vm)
+{
+ return (u32) (vlib_time_now(vm) + 10000);
+}
+
+u8 *format_lb_main (u8 * s, va_list * args)
+{
+ vlib_thread_main_t *tm = vlib_get_thread_main();
+ lb_main_t *lbm = &lb_main;
+ s = format(s, "lb_main");
+ s = format(s, " ip4-src-address: %U \n", format_ip4_address, &lbm->ip4_src_address);
+ s = format(s, " ip6-src-address: %U \n", format_ip6_address, &lbm->ip6_src_address);
+ s = format(s, " #vips: %u\n", pool_elts(lbm->vips));
+ s = format(s, " #ass: %u\n", pool_elts(lbm->ass) - 1);
+
+ u32 cpu_index;
+ for(cpu_index = 0; cpu_index < tm->n_vlib_mains; cpu_index++ ) {
+ lb_hash_t *h = lbm->per_cpu[cpu_index].sticky_ht;
+ if (h) {
+ s = format(s, "core %d\n", cpu_index);
+ s = format(s, " timeout: %ds\n", h->timeout);
+ s = format(s, " usage: %d / %d\n", lb_hash_elts(h, lb_hash_time_now(vlib_get_main())), lb_hash_size(h));
+ }
+ }
+
+ return s;
+}
+
+static char *lb_vip_type_strings[] = {
+ [LB_VIP_TYPE_IP6_GRE6] = "ip6-gre6",
+ [LB_VIP_TYPE_IP6_GRE4] = "ip6-gre4",
+ [LB_VIP_TYPE_IP4_GRE6] = "ip4-gre6",
+ [LB_VIP_TYPE_IP4_GRE4] = "ip4-gre4",
+};
+
+u8 *format_lb_vip_type (u8 * s, va_list * args)
+{
+ lb_vip_type_t vipt = va_arg (*args, lb_vip_type_t);
+ u32 i;
+ for (i=0; i<LB_VIP_N_TYPES; i++)
+ if (vipt == i)
+ return format(s, lb_vip_type_strings[i]);
+ return format(s, "_WRONG_TYPE_");
+}
+
+uword unformat_lb_vip_type (unformat_input_t * input, va_list * args)
+{
+ lb_vip_type_t *vipt = va_arg (*args, lb_vip_type_t *);
+ u32 i;
+ for (i=0; i<LB_VIP_N_TYPES; i++)
+ if (unformat(input, lb_vip_type_strings[i])) {
+ *vipt = i;
+ return 1;
+ }
+ return 0;
+}
+
+u8 *format_lb_vip (u8 * s, va_list * args)
+{
+ lb_vip_t *vip = va_arg (*args, lb_vip_t *);
+ return format(s, "%U %U new_size:%u #as:%u%s",
+ format_lb_vip_type, vip->type,
+ format_ip46_prefix, &vip->prefix, vip->plen, IP46_TYPE_ANY,
+ vip->new_flow_table_mask + 1,
+ pool_elts(vip->as_indexes),
+ (vip->flags & LB_VIP_FLAGS_USED)?"":" removed");
+}
+
+u8 *format_lb_as (u8 * s, va_list * args)
+{
+ lb_as_t *as = va_arg (*args, lb_as_t *);
+ return format(s, "%U %s", format_ip46_address, &as->address, (as->flags & LB_AS_FLAGS_USED)?"used":"removed");
+}
+
+u8 *format_lb_vip_detailed (u8 * s, va_list * args)
+{
+ lb_main_t *lbm = &lb_main;
+ lb_vip_t *vip = va_arg (*args, lb_vip_t *);
+ uword indent = format_get_indent (s);
+
+ s = format(s, "%U %U [%u] %U%s\n"
+ "%U new_size:%u\n",
+ format_white_space, indent,
+ format_lb_vip_type, vip->type,
+ vip - lbm->vips, format_ip46_prefix, &vip->prefix, vip->plen, IP46_TYPE_ANY,
+ (vip->flags & LB_VIP_FLAGS_USED)?"":" removed",
+ format_white_space, indent,
+ vip->new_flow_table_mask + 1);
+
+ //Print counters
+ s = format(s, "%U counters:\n",
+ format_white_space, indent);
+ u32 i;
+ for (i=0; i<LB_N_VIP_COUNTERS; i++)
+ s = format(s, "%U %s: %d\n",
+ format_white_space, indent,
+ lbm->vip_counters[i].name,
+ vlib_get_simple_counter(&lbm->vip_counters[i], vip - lbm->vips));
+
+
+ s = format(s, "%U #as:%u\n",
+ format_white_space, indent,
+ pool_elts(vip->as_indexes));
+
+ //Let's count the buckets for each AS
+ u32 *count = 0;
+ vec_validate(count, pool_len(lbm->ass)); //Possibly big alloc for not much...
+ lb_new_flow_entry_t *nfe;
+ vec_foreach(nfe, vip->new_flow_table)
+ count[nfe->as_index]++;
+
+ lb_as_t *as;
+ u32 *as_index;
+ pool_foreach(as_index, vip->as_indexes, {
+ as = &lbm->ass[*as_index];
+ s = format(s, "%U %U %d buckets %d flows %s\n", format_white_space, indent,
+ format_ip46_address, &as->address, IP46_TYPE_ANY,
+ count[as - lbm->ass],
+ vlib_refcount_get(&lbm->as_refcount, as - lbm->ass),
+ (as->flags & LB_AS_FLAGS_USED)?"used":" removed");
+ });
+
+ vec_free(count);
+
+ /*
+ s = format(s, "%U new flows table:\n", format_white_space, indent);
+ lb_new_flow_entry_t *nfe;
+ vec_foreach(nfe, vip->new_flow_table) {
+ s = format(s, "%U %d: %d\n", format_white_space, indent, nfe - vip->new_flow_table, nfe->as_index);
+ }
+ */
+ return s;
+}
+
+
+typedef struct {
+ u32 as_index;
+ u32 last;
+ u32 skip;
+} lb_pseudorand_t;
+
+static int lb_pseudorand_compare(void *a, void *b)
+{
+ lb_as_t *asa, *asb;
+ lb_main_t *lbm = &lb_main;
+ asa = &lbm->ass[((lb_pseudorand_t *)a)->as_index];
+ asb = &lbm->ass[((lb_pseudorand_t *)b)->as_index];
+ return memcmp(&asa->address, &asb->address, sizeof(asb->address));
+}
+
+static void lb_vip_garbage_collection(lb_vip_t *vip)
+{
+ lb_main_t *lbm = &lb_main;
+ ASSERT (lbm->writer_lock[0]);
+
+ u32 now = (u32) vlib_time_now(vlib_get_main());
+ if (!clib_u32_loop_gt(now, vip->last_garbage_collection + LB_GARBAGE_RUN))
+ return;
+
+ vip->last_garbage_collection = now;
+ lb_as_t *as;
+ u32 *as_index;
+ pool_foreach(as_index, vip->as_indexes, {
+ as = &lbm->ass[*as_index];
+ if (!(as->flags & LB_AS_FLAGS_USED) && //Not used
+ clib_u32_loop_gt(now, as->last_used + LB_CONCURRENCY_TIMEOUT) && //Not recently used
+ (vlib_refcount_get(&lbm->as_refcount, as - lbm->ass) == 0)) { //Not referenced
+ pool_put(vip->as_indexes, as_index);
+ pool_put(lbm->ass, as);
+ }
+ });
+}
+
+void lb_garbage_collection()
+{
+ lb_main_t *lbm = &lb_main;
+ lb_get_writer_lock();
+ lb_vip_t *vip;
+ u32 *to_be_removed_vips = 0, *i;
+ pool_foreach(vip, lbm->vips, {
+ lb_vip_garbage_collection(vip);
+
+ if (!(vip->flags & LB_VIP_FLAGS_USED) &&
+ (pool_elts(vip->as_indexes) == 0)) {
+ vec_add1(to_be_removed_vips, vip - lbm->vips);
+ }
+ });
+
+ vec_foreach(i, to_be_removed_vips) {
+ vip = &lbm->vips[*i];
+ pool_put(lbm->vips, vip);
+ pool_free(vip->as_indexes);
+ }
+
+ vec_free(to_be_removed_vips);
+ lb_put_writer_lock();
+}
+
+static void lb_vip_update_new_flow_table(lb_vip_t *vip)
+{
+ lb_main_t *lbm = &lb_main;
+ lb_new_flow_entry_t *old_table;
+ u32 i, *as_index;
+ lb_new_flow_entry_t *new_flow_table = 0;
+ lb_as_t *as;
+ lb_pseudorand_t *pr, *sort_arr = 0;
+ u32 count;
+
+ ASSERT (lbm->writer_lock[0]); //We must have the lock
+
+ //Check if some AS is configured or not
+ i = 0;
+ pool_foreach(as_index, vip->as_indexes, {
+ as = &lbm->ass[*as_index];
+ if (as->flags & LB_AS_FLAGS_USED) { //Not used anymore
+ i = 1;
+ goto out; //Not sure 'break' works in this macro-loop
+ }
+ });
+
+out:
+ if (i == 0) {
+ //Only the default. i.e. no AS
+ vec_validate(new_flow_table, vip->new_flow_table_mask);
+ for (i=0; i<vec_len(new_flow_table); i++)
+ new_flow_table[i].as_index = 0;
+
+ goto finished;
+ }
+
+ //First, let's sort the ASs
+ sort_arr = 0;
+ vec_alloc(sort_arr, pool_elts(vip->as_indexes));
+
+ i = 0;
+ pool_foreach(as_index, vip->as_indexes, {
+ as = &lbm->ass[*as_index];
+ if (!(as->flags & LB_AS_FLAGS_USED)) //Not used anymore
+ continue;
+
+ sort_arr[i].as_index = as - lbm->ass;
+ i++;
+ });
+ _vec_len(sort_arr) = i;
+
+ vec_sort_with_function(sort_arr, lb_pseudorand_compare);
+
+ //Now let's pseudo-randomly generate permutations
+ vec_foreach(pr, sort_arr) {
+ lb_as_t *as = &lbm->ass[pr->as_index];
+
+ u64 seed = clib_xxhash(as->address.as_u64[0] ^
+ as->address.as_u64[1]);
+ /* We have 2^n buckets.
+ * skip must be prime with 2^n.
+ * So skip must be odd.
+ * MagLev actually state that M should be prime,
+ * but this has a big computation cost (% operation).
+ * Using 2^n is more better (& operation).
+ */
+ pr->skip = ((seed & 0xffffffff) | 1) & vip->new_flow_table_mask;
+ pr->last = (seed >> 32) & vip->new_flow_table_mask;
+ }
+
+ //Let's create a new flow table
+ vec_validate(new_flow_table, vip->new_flow_table_mask);
+ for (i=0; i<vec_len(new_flow_table); i++)
+ new_flow_table[i].as_index = ~0;
+
+ u32 done = 0;
+ while (1) {
+ vec_foreach(pr, sort_arr) {
+ while (1) {
+ u32 last = pr->last;
+ pr->last = (pr->last + pr->skip) & vip->new_flow_table_mask;
+ if (new_flow_table[last].as_index == ~0) {
+ new_flow_table[last].as_index = pr->as_index;
+ break;
+ }
+ }
+ done++;
+ if (done == vec_len(new_flow_table))
+ goto finished;
+ }
+ }
+
+ vec_free(sort_arr);
+
+finished:
+
+//Count number of changed entries
+ count = 0;
+ for (i=0; i<vec_len(new_flow_table); i++)
+ if (vip->new_flow_table == 0 ||
+ new_flow_table[i].as_index != vip->new_flow_table[i].as_index)
+ count++;
+
+ old_table = vip->new_flow_table;
+ vip->new_flow_table = new_flow_table;
+ vec_free(old_table);
+}
+
+int lb_conf(ip4_address_t *ip4_address, ip6_address_t *ip6_address,
+ u32 per_cpu_sticky_buckets, u32 flow_timeout)
+{
+ lb_main_t *lbm = &lb_main;
+
+ if (!is_pow2(per_cpu_sticky_buckets))
+ return VNET_API_ERROR_INVALID_MEMORY_SIZE;
+
+ lb_get_writer_lock(); //Not exactly necessary but just a reminder that it exists for my future self
+ lbm->ip4_src_address = *ip4_address;
+ lbm->ip6_src_address = *ip6_address;
+ lbm->per_cpu_sticky_buckets = per_cpu_sticky_buckets;
+ lbm->flow_timeout = flow_timeout;
+ lb_put_writer_lock();
+ return 0;
+}
+
+static
+int lb_vip_find_index_with_lock(ip46_address_t *prefix, u8 plen, u32 *vip_index)
+{
+ lb_main_t *lbm = &lb_main;
+ lb_vip_t *vip;
+ ASSERT (lbm->writer_lock[0]); //This must be called with the lock owned
+ ip46_prefix_normalize(prefix, plen);
+ pool_foreach(vip, lbm->vips, {
+ if ((vip->flags & LB_AS_FLAGS_USED) &&
+ vip->plen == plen &&
+ vip->prefix.as_u64[0] == prefix->as_u64[0] &&
+ vip->prefix.as_u64[1] == prefix->as_u64[1]) {
+ *vip_index = vip - lbm->vips;
+ return 0;
+ }
+ });
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+}
+
+int lb_vip_find_index(ip46_address_t *prefix, u8 plen, u32 *vip_index)
+{
+ int ret;
+ lb_get_writer_lock();
+ ret = lb_vip_find_index_with_lock(prefix, plen, vip_index);
+ lb_put_writer_lock();
+ return ret;
+}
+
+static int lb_as_find_index_vip(lb_vip_t *vip, ip46_address_t *address, u32 *as_index)
+{
+ lb_main_t *lbm = &lb_main;
+ ASSERT (lbm->writer_lock[0]); //This must be called with the lock owned
+ lb_as_t *as;
+ u32 *asi;
+ pool_foreach(asi, vip->as_indexes, {
+ as = &lbm->ass[*asi];
+ if (as->vip_index == (vip - lbm->vips) &&
+ as->address.as_u64[0] == address->as_u64[0] &&
+ as->address.as_u64[1] == address->as_u64[1]) {
+ *as_index = as - lbm->ass;
+ return 0;
+ }
+ });
+ return -1;
+}
+
+int lb_vip_add_ass(u32 vip_index, ip46_address_t *addresses, u32 n)
+{
+ lb_main_t *lbm = &lb_main;
+ lb_get_writer_lock();
+ lb_vip_t *vip;
+ if (!(vip = lb_vip_get_by_index(vip_index))) {
+ lb_put_writer_lock();
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+ }
+
+ ip46_type_t type = lb_vip_is_gre4(vip)?IP46_TYPE_IP4:IP46_TYPE_IP6;
+ u32 *to_be_added = 0;
+ u32 *to_be_updated = 0;
+ u32 i;
+ u32 *ip;
+
+ //Sanity check
+ while (n--) {
+
+ if (!lb_as_find_index_vip(vip, &addresses[n], &i)) {
+ if (lbm->ass[i].flags & LB_AS_FLAGS_USED) {
+ vec_free(to_be_added);
+ vec_free(to_be_updated);
+ lb_put_writer_lock();
+ return VNET_API_ERROR_VALUE_EXIST;
+ }
+ vec_add1(to_be_updated, i);
+ goto next;
+ }
+
+ if (ip46_address_type(&addresses[n]) != type) {
+ vec_free(to_be_added);
+ vec_free(to_be_updated);
+ lb_put_writer_lock();
+ return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
+ }
+
+ if (n) {
+ u32 n2 = n;
+ while(n2--) //Check for duplicates
+ if (addresses[n2].as_u64[0] == addresses[n].as_u64[0] &&
+ addresses[n2].as_u64[1] == addresses[n].as_u64[1])
+ goto next;
+ }
+
+ vec_add1(to_be_added, n);
+
+next:
+ continue;
+ }
+
+ //Update reused ASs
+ vec_foreach(ip, to_be_updated) {
+ lbm->ass[*ip].flags = LB_AS_FLAGS_USED;
+ }
+ vec_free(to_be_updated);
+
+ //Create those who have to be created
+ vec_foreach(ip, to_be_added) {
+ lb_as_t *as;
+ u32 *as_index;
+ pool_get(lbm->ass, as);
+ as->address = addresses[*ip];
+ as->flags = LB_AS_FLAGS_USED;
+ as->vip_index = vip_index;
+ pool_get(vip->as_indexes, as_index);
+ *as_index = as - lbm->ass;
+ }
+ vec_free(to_be_added);
+
+ //Recompute flows
+ lb_vip_update_new_flow_table(vip);
+
+ //Garbage collection maybe
+ lb_vip_garbage_collection(vip);
+
+ lb_put_writer_lock();
+ return 0;
+}
+
+int lb_vip_del_ass_withlock(u32 vip_index, ip46_address_t *addresses, u32 n)
+{
+ lb_main_t *lbm = &lb_main;
+ u32 now = (u32) vlib_time_now(vlib_get_main());
+ u32 *ip = 0;
+
+ lb_vip_t *vip;
+ if (!(vip = lb_vip_get_by_index(vip_index))) {
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+ }
+
+ u32 *indexes = NULL;
+ while (n--) {
+ u32 i;
+ if (lb_as_find_index_vip(vip, &addresses[n], &i)) {
+ vec_free(indexes);
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+ }
+
+ if (n) { //Check for duplicates
+ u32 n2 = n - 1;
+ while(n2--) {
+ if (addresses[n2].as_u64[0] == addresses[n].as_u64[0] &&
+ addresses[n2].as_u64[1] == addresses[n].as_u64[1])
+ goto next;
+ }
+ }
+
+ vec_add1(indexes, i);
+next:
+ continue;
+ }
+
+ //Garbage collection maybe
+ lb_vip_garbage_collection(vip);
+
+ if (indexes != NULL) {
+ vec_foreach(ip, indexes) {
+ lbm->ass[*ip].flags &= ~LB_AS_FLAGS_USED;
+ lbm->ass[*ip].last_used = now;
+ }
+
+ //Recompute flows
+ lb_vip_update_new_flow_table(vip);
+ }
+
+ vec_free(indexes);
+ return 0;
+}
+
+int lb_vip_del_ass(u32 vip_index, ip46_address_t *addresses, u32 n)
+{
+ lb_get_writer_lock();
+ int ret = lb_vip_del_ass_withlock(vip_index, addresses, n);
+ lb_put_writer_lock();
+ return ret;
+}
+
+
+/**
+ * Add the VIP adjacency to the ip4 or ip6 fib
+ */
+static void lb_vip_add_adjacency(lb_main_t *lbm, lb_vip_t *vip)
+{
+ ip_adjacency_t adj;
+ //Adjacency
+ memset (&adj, 0, sizeof (adj));
+ adj.explicit_fib_index = ~0;
+ lb_adj_data_t *ad = (lb_adj_data_t *) &adj.opaque;
+ ad->vip_index = vip - lbm->vips;
+
+ ASSERT (lbm->writer_lock[0]); //This must be called with the lock owned
+ u32 lookup_next_index = lbm->ip_lookup_next_index[vip->type];
+
+ if (lb_vip_is_ip4(vip)) {
+ adj.lookup_next_index = lookup_next_index;
+ ip4_add_del_route_args_t route_args = {};
+ ip4_main_t *im4 = &ip4_main;
+ route_args.table_index_or_table_id = 0;
+ route_args.flags = IP4_ROUTE_FLAG_ADD;
+ route_args.dst_address = vip->prefix.ip4;
+ route_args.dst_address_length = vip->plen - 96;
+ route_args.adj_index = ~0;
+ route_args.add_adj = &adj;
+ route_args.n_add_adj = 1;
+ ip4_add_del_route (im4, &route_args);
+ } else {
+ adj.lookup_next_index = lookup_next_index;
+ ip6_add_del_route_args_t route_args = {};
+ ip6_main_t *im6 = &ip6_main;
+ route_args.table_index_or_table_id = 0;
+ route_args.flags = IP6_ROUTE_FLAG_ADD;
+ route_args.dst_address = vip->prefix.ip6;
+ route_args.dst_address_length = vip->plen;
+ route_args.adj_index = ~0;
+ route_args.add_adj = &adj;
+ route_args.n_add_adj = 1;
+ ip6_add_del_route (im6, &route_args);
+ }
+}
+
+/**
+ * Deletes the adjacency associated with the VIP
+ */
+static void lb_vip_del_adjacency(lb_main_t *lbm, lb_vip_t *vip)
+{
+ ASSERT (lbm->writer_lock[0]); //This must be called with the lock owned
+ if (lb_vip_is_ip4(vip)) {
+ ip4_main_t *im4 = &ip4_main;
+ ip4_add_del_route_args_t route_args = {};
+ route_args.table_index_or_table_id = 0;
+ route_args.flags = IP4_ROUTE_FLAG_DEL;
+ route_args.dst_address = vip->prefix.ip4;
+ route_args.dst_address_length = vip->plen - 96;
+ route_args.adj_index = ~0;
+ route_args.add_adj = NULL;
+ route_args.n_add_adj = 0;
+ ip4_add_del_route (im4, &route_args);
+ } else {
+ ip6_main_t *im6 = &ip6_main;
+ ip6_add_del_route_args_t route_args = {};
+ route_args.table_index_or_table_id = 0;
+ route_args.flags = IP6_ROUTE_FLAG_DEL;
+ route_args.dst_address = vip->prefix.ip6;
+ route_args.dst_address_length = vip->plen;
+ route_args.adj_index = ~0;
+ route_args.add_adj = NULL;
+ route_args.n_add_adj = 0;
+ ip6_add_del_route (im6, &route_args);
+ }
+}
+
+int lb_vip_add(ip46_address_t *prefix, u8 plen, lb_vip_type_t type, u32 new_length, u32 *vip_index)
+{
+ lb_main_t *lbm = &lb_main;
+ lb_vip_t *vip;
+ lb_get_writer_lock();
+ ip46_prefix_normalize(prefix, plen);
+
+ if (!lb_vip_find_index_with_lock(prefix, plen, vip_index)) {
+ lb_put_writer_lock();
+ return VNET_API_ERROR_VALUE_EXIST;
+ }
+
+ if (!is_pow2(new_length)) {
+ lb_put_writer_lock();
+ return VNET_API_ERROR_INVALID_MEMORY_SIZE;
+ }
+
+ if (ip46_prefix_is_ip4(prefix, plen) &&
+ (type != LB_VIP_TYPE_IP4_GRE4) &&
+ (type != LB_VIP_TYPE_IP4_GRE6))
+ return VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
+
+
+ //Allocate
+ pool_get(lbm->vips, vip);
+
+ //Init
+ vip->prefix = *prefix;
+ vip->plen = plen;
+ vip->last_garbage_collection = (u32) vlib_time_now(vlib_get_main());
+ vip->type = type;
+ vip->flags = LB_VIP_FLAGS_USED;
+ vip->as_indexes = 0;
+
+ //Validate counters
+ u32 i;
+ for (i = 0; i < LB_N_VIP_COUNTERS; i++) {
+ vlib_validate_simple_counter(&lbm->vip_counters[i], vip - lbm->vips);
+ vlib_zero_simple_counter(&lbm->vip_counters[i], vip - lbm->vips);
+ }
+
+ //Configure new flow table
+ vip->new_flow_table_mask = new_length - 1;
+ vip->new_flow_table = 0;
+
+ //Create a new flow hash table full of the default entry
+ lb_vip_update_new_flow_table(vip);
+
+ //Create adjacency to direct traffic
+ lb_vip_add_adjacency(lbm, vip);
+
+ //Return result
+ *vip_index = vip - lbm->vips;
+
+ lb_put_writer_lock();
+ return 0;
+}
+
+int lb_vip_del(u32 vip_index)
+{
+ lb_main_t *lbm = &lb_main;
+ lb_vip_t *vip;
+ lb_get_writer_lock();
+ if (!(vip = lb_vip_get_by_index(vip_index))) {
+ lb_put_writer_lock();
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+ }
+
+ //FIXME: This operation is actually not working
+ //We will need to remove state before performing this.
+
+ {
+ //Remove all ASs
+ ip46_address_t *ass = 0;
+ lb_as_t *as;
+ u32 *as_index;
+ pool_foreach(as_index, vip->as_indexes, {
+ as = &lbm->ass[*as_index];
+ vec_add1(ass, as->address);
+ });
+ if (vec_len(ass))
+ lb_vip_del_ass_withlock(vip_index, ass, vec_len(ass));
+ vec_free(ass);
+ }
+
+ //Delete adjacency
+ lb_vip_del_adjacency(lbm, vip);
+
+ //Set the VIP as unused
+ vip->flags &= ~LB_VIP_FLAGS_USED;
+
+ lb_put_writer_lock();
+ return 0;
+}
+
+clib_error_t *
+vlib_plugin_register (vlib_main_t * vm,
+ vnet_plugin_handoff_t * h,
+ int from_early_init)
+{
+ clib_error_t *error = 0;
+ return error;
+}
+
+clib_error_t *
+lb_init (vlib_main_t * vm)
+{
+ vlib_thread_main_t *tm = vlib_get_thread_main ();
+ lb_main_t *lbm = &lb_main;
+ lb_as_t *default_as;
+ lbm->vips = 0;
+ lbm->per_cpu = 0;
+ vec_validate(lbm->per_cpu, tm->n_vlib_mains - 1);
+ lbm->writer_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
+ lbm->writer_lock[0] = 0;
+ lbm->per_cpu_sticky_buckets = LB_DEFAULT_PER_CPU_STICKY_BUCKETS;
+ lbm->flow_timeout = LB_DEFAULT_FLOW_TIMEOUT;
+ lbm->ip4_src_address.as_u32 = 0xffffffff;
+ lbm->ip6_src_address.as_u64[0] = 0xffffffffffffffffL;
+ lbm->ip6_src_address.as_u64[1] = 0xffffffffffffffffL;
+
+ //Init AS reference counters
+ vlib_refcount_init(&lbm->as_refcount);
+
+ //Allocate and init default AS.
+ lbm->ass = 0;
+ pool_get(lbm->ass, default_as);
+ default_as->flags = 0;
+ default_as->vip_index = ~0;
+ default_as->address.ip6.as_u64[0] = 0xffffffffffffffffL;
+ default_as->address.ip6.as_u64[1] = 0xffffffffffffffffL;
+
+#define _(a,b,c) lbm->vip_counters[c].name = b;
+ lb_foreach_vip_counter
+#undef _
+ return NULL;
+}
+
+VLIB_INIT_FUNCTION (lb_init);
--- /dev/null
+/*
+ * 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.
+ */
+
+/**
+ * lb-plugin implements a MagLev-like load balancer.
+ * http://research.google.com/pubs/pub44824.html
+ *
+ * It hasn't been tested for interoperability with the original MagLev
+ * but intends to provide similar functionality.
+ * The load-balancer receives traffic destined to VIP (Virtual IP)
+ * addresses from one or multiple(ECMP) routers.
+ * The load-balancer tunnels the traffic toward many application servers
+ * ensuring session stickyness (i.e. that a single sessions is tunneled
+ * towards a single application server).
+ *
+ */
+
+#ifndef LB_PLUGIN_LB_LB_H_
+#define LB_PLUGIN_LB_LB_H_
+
+#include <lb/util.h>
+#include <lb/refcount.h>
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+
+#include <lb/lbhash.h>
+
+#define LB_DEFAULT_PER_CPU_STICKY_BUCKETS 1 << 10
+#define LB_DEFAULT_FLOW_TIMEOUT 40
+
+/**
+ * Each VIP is configured with a set of
+ * application server.
+ */
+typedef struct {
+ /**
+ * Destination address used to tunnel traffic towards
+ * that application server.
+ * The address is also used as ID and pseudo-random
+ * seed for the load-balancing process.
+ */
+ ip46_address_t address;
+
+ /**
+ * ASs are indexed by address and VIP Index.
+ * Which means there will be duplicated if the same server
+ * address is used for multiple VIPs.
+ */
+ u32 vip_index;
+
+ /**
+ * Some per-AS flags.
+ * For now only LB_AS_FLAGS_USED is defined.
+ */
+ u8 flags;
+
+#define LB_AS_FLAGS_USED 0x1
+
+ /**
+ * Rotating timestamp of when LB_AS_FLAGS_USED flag was last set.
+ *
+ * AS removal is based on garbage collection and reference counting.
+ * When an AS is removed, there is a race between configuration core
+ * and worker cores which may still add a reference while it should not
+ * be used. This timestamp is used to not remove the AS while a race condition
+ * may happen.
+ */
+ u32 last_used;
+} lb_as_t;
+
+format_function_t format_lb_as;
+
+typedef struct {
+ u32 as_index;
+} lb_new_flow_entry_t;
+
+#define lb_foreach_vip_counter \
+ _(TRACKED_SESSION, "tracked session", 0) \
+ _(UNTRACKED_PACKET, "untracked packet", 1)
+
+typedef enum {
+#define _(a,b,c) LB_VIP_COUNTER_##a = c,
+ lb_foreach_vip_counter
+#undef _
+ LB_N_VIP_COUNTERS
+} lb_vip_counter_t;
+
+/**
+ * The load balancer supports IPv4 and IPv6 traffic
+ * and GRE4 and GRE6 encap.
+ */
+typedef enum {
+ LB_VIP_TYPE_IP6_GRE6,
+ LB_VIP_TYPE_IP6_GRE4,
+ LB_VIP_TYPE_IP4_GRE6,
+ LB_VIP_TYPE_IP4_GRE4,
+ LB_VIP_N_TYPES,
+} lb_vip_type_t;
+
+format_function_t format_lb_vip_type;
+unformat_function_t unformat_lb_vip_type;
+
+/**
+ * Load balancing service is provided per VIP.
+ * In this data model, a VIP can be a whole prefix.
+ * But load balancing only
+ * occurs on a per-source-address/port basis. Meaning that if a given source
+ * reuses the same port for multiple destinations within the same VIP,
+ * they will be considered as a single flow.
+ */
+typedef struct {
+
+ //Runtime
+
+ /**
+ * Vector mapping (flow-hash & new_connect_table_mask) to AS index.
+ * This is used for new flows.
+ */
+ lb_new_flow_entry_t *new_flow_table;
+
+ /**
+ * New flows table length - 1
+ * (length MUST be a power of 2)
+ */
+ u32 new_flow_table_mask;
+
+ /**
+ * Last time garbage collection was run to free the ASs.
+ */
+ u32 last_garbage_collection;
+
+ //Not runtime
+
+ /**
+ * A Virtual IP represents a given service delivered
+ * by a set of application servers. It can be a single
+ * address or a prefix.
+ * IPv4 prefixes are encoded using IPv4-in-IPv6 embedded address
+ * (i.e. ::/96 prefix).
+ */
+ ip46_address_t prefix;
+
+ /**
+ * The VIP prefix length.
+ * In case of IPv4, plen = 96 + ip4_plen.
+ */
+ u8 plen;
+
+ /**
+ * The type of traffic for this.
+ * LB_TYPE_UNDEFINED if unknown.
+ */
+ lb_vip_type_t type;
+
+ /**
+ * Flags related to this VIP.
+ * LB_VIP_FLAGS_USED means the VIP is active.
+ * When it is not set, the VIP in the process of being removed.
+ * We cannot immediately remove a VIP because the VIP index still may be stored
+ * in the adjacency index.
+ */
+ u8 flags;
+
+ /**
+ * Pool of AS indexes used for this VIP.
+ * This also includes ASs that have been removed (but are still referenced).
+ */
+ u32 *as_indexes;
+
+#define LB_VIP_FLAGS_USED 0x1
+
+} lb_vip_t;
+
+#define lb_vip_is_ip4(vip) ((vip)->type == LB_VIP_TYPE_IP4_GRE6 || (vip)->type == LB_VIP_TYPE_IP4_GRE4)
+#define lb_vip_is_gre4(vip) ((vip)->type == LB_VIP_TYPE_IP6_GRE4 || (vip)->type == LB_VIP_TYPE_IP4_GRE4)
+format_function_t format_lb_vip;
+format_function_t format_lb_vip_detailed;
+
+typedef struct {
+ /**
+ * Each CPU has its own sticky flow hash table.
+ * One single table is used for all VIPs.
+ */
+ lb_hash_t *sticky_ht;
+} lb_per_cpu_t;
+
+typedef struct {
+ /**
+ * Pool of all Virtual IPs
+ */
+ lb_vip_t *vips;
+
+ /**
+ * Pool of ASs.
+ * ASs are referenced by address and vip index.
+ * The first element (index 0) is special and used only to fill
+ * new_flow_tables when no AS has been configured.
+ */
+ lb_as_t *ass;
+
+ /**
+ * Each AS has an associated reference counter.
+ * As ass[0] has a special meaning, its associated counter
+ * starts at 0 and is decremented instead. i.e. do not use it.
+ */
+ vlib_refcount_t as_refcount;
+
+ /**
+ * Some global data is per-cpu
+ */
+ lb_per_cpu_t *per_cpu;
+
+ /**
+ * Node next index for IP adjacencies, for each of the traffic types.
+ */
+ u32 ip_lookup_next_index[LB_VIP_N_TYPES];
+
+ /**
+ * Source address used in IPv6 encapsulated traffic
+ */
+ ip6_address_t ip6_src_address;
+
+ /**
+ * Source address used for IPv4 encapsulated traffic
+ */
+ ip4_address_t ip4_src_address;
+
+ /**
+ * Number of buckets in the per-cpu sticky hash table.
+ */
+ u32 per_cpu_sticky_buckets;
+
+ /**
+ * Flow timeout in seconds.
+ */
+ u32 flow_timeout;
+
+ /**
+ * Per VIP counter
+ */
+ vlib_simple_counter_main_t vip_counters[LB_N_VIP_COUNTERS];
+
+ /**
+ * API dynamically registered base ID.
+ */
+ u16 msg_id_base;
+
+ volatile u32 *writer_lock;
+} lb_main_t;
+
+/**
+ * struct stored in adj->opaque data.
+ */
+typedef struct {
+ /**
+ * Index of the VIP associated with that IP adjacency.
+ */
+ u32 vip_index;
+} lb_adj_data_t;
+
+extern lb_main_t lb_main;
+extern vlib_node_registration_t lb6_node;
+extern vlib_node_registration_t lb4_node;
+
+/**
+ * Fix global load-balancer parameters.
+ * @param ip4_address IPv4 source address used for encapsulated traffic
+ * @param ip6_address IPv6 source address used for encapsulated traffic
+ * @return 0 on success. VNET_LB_ERR_XXX on error
+ */
+int lb_conf(ip4_address_t *ip4_address, ip6_address_t *ip6_address,
+ u32 sticky_buckets, u32 flow_timeout);
+
+int lb_vip_add(ip46_address_t *prefix, u8 plen, lb_vip_type_t type,
+ u32 new_length, u32 *vip_index);
+int lb_vip_del(u32 vip_index);
+
+int lb_vip_find_index(ip46_address_t *prefix, u8 plen, u32 *vip_index);
+
+#define lb_vip_get_by_index(index) (pool_is_free_index(lb_main.vips, index)?NULL:pool_elt_at_index(lb_main.vips, index))
+
+int lb_vip_add_ass(u32 vip_index, ip46_address_t *addresses, u32 n);
+int lb_vip_del_ass(u32 vip_index, ip46_address_t *addresses, u32 n);
+
+u32 lb_hash_time_now(vlib_main_t * vm);
+
+void lb_garbage_collection();
+
+format_function_t format_lb_main;
+
+#endif /* LB_PLUGIN_LB_LB_H_ */
--- /dev/null
+/*
+ * 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;
+}
--- /dev/null
+/*
+ * Copyright (c) 2012 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.
+ */
+
+/**
+ * vppinfra already includes tons of different hash tables.
+ * MagLev flow table is a bit different. It has to be very efficient
+ * for both writing and reading operations. But it does not need to
+ * be 100% reliable (write can fail). It also needs to recycle
+ * old entries in a lazy way.
+ *
+ * This hash table is the most dummy hash table you can do.
+ * Fixed total size, fixed bucket size.
+ * Advantage is that it could be very efficient (maybe).
+ *
+ */
+
+#ifndef LB_PLUGIN_LB_LBHASH_H_
+#define LB_PLUGIN_LB_LBHASH_H_
+
+#include <vnet/vnet.h>
+
+#define LBHASH_ENTRY_PER_BUCKET_LOG2 2
+#define LBHASH_ENTRY_PER_BUCKET (1 << LBHASH_ENTRY_PER_BUCKET_LOG2)
+#define LBHASH_ENTRY_PER_BUCKET_MASK (LBHASH_ENTRY_PER_BUCKET - 1)
+
+typedef struct {
+ u64 key[5];
+ u32 value;
+ u32 last_seen;
+} lb_hash_entry_t;
+
+typedef struct {
+ u32 buckets_mask;
+ u32 timeout;
+ lb_hash_entry_t entries[];
+} lb_hash_t;
+
+#define lb_hash_nbuckets(h) (((h)->buckets_mask >> LBHASH_ENTRY_PER_BUCKET_LOG2) + 1)
+#define lb_hash_size(h) ((h)->buckets_mask + LBHASH_ENTRY_PER_BUCKET)
+
+#define lb_hash_foreach_entry(h, e) \
+ for (e = (h)->entries; e < h->entries + lb_hash_size(h); e++)
+
+#define lb_hash_foreach_valid_entry(h, e, now) \
+ lb_hash_foreach_entry(h, e) \
+ if (!clib_u32_loop_gt((now), (e)->last_seen + (h)->timeout))
+
+static_always_inline
+lb_hash_t *lb_hash_alloc(u32 buckets, u32 timeout)
+{
+ if ((!is_pow2(buckets)) ||
+ ((buckets << LBHASH_ENTRY_PER_BUCKET_LOG2) == 0))
+ return NULL;
+
+ // Allocate 1 more bucket for prefetch
+ u32 size = sizeof(lb_hash_t) + ((buckets << LBHASH_ENTRY_PER_BUCKET_LOG2) + 1)* sizeof(lb_hash_entry_t);
+ u8 *mem = 0;
+ lb_hash_t *h;
+ vec_alloc_aligned(mem, size, CLIB_CACHE_LINE_BYTES);
+ h = (lb_hash_t *)mem;
+ h->buckets_mask = (buckets - 1) << LBHASH_ENTRY_PER_BUCKET_LOG2;
+ h->timeout = timeout;
+ return h;
+}
+
+static_always_inline
+void lb_hash_free(lb_hash_t *h)
+{
+ vec_free(h);
+}
+
+#if __SSE4_2__
+static_always_inline
+u32 lb_hash_crc_u32(u32 data, u32 value)
+{
+ __asm__ volatile( "crc32l %[data], %[value];"
+ : [value] "+r" (value)
+ : [data] "rm" (data));
+ return value;
+}
+
+static_always_inline
+u32 lb_hash_hash(u64 k[5])
+{
+ u32 * dp = (u32 *) k;
+ u32 value = 0;
+
+ value = lb_hash_crc_u32 (dp[0], value);
+ value = lb_hash_crc_u32 (dp[1], value);
+ value = lb_hash_crc_u32 (dp[2], value);
+ value = lb_hash_crc_u32 (dp[3], value);
+ value = lb_hash_crc_u32 (dp[4], value);
+ value = lb_hash_crc_u32 (dp[5], value);
+ value = lb_hash_crc_u32 (dp[6], value);
+ value = lb_hash_crc_u32 (dp[7], value);
+ value = lb_hash_crc_u32 (dp[8], value);
+ value = lb_hash_crc_u32 (dp[9], value);
+ return value;
+}
+#else
+static_always_inline
+u32 lb_hash_hash(u64 k[5])
+{
+ u64 tmp = k[0] ^ k[1] ^ k[2] ^ k[3] ^ k[4];
+ return (u32)clib_xxhash (tmp);
+}
+#endif
+
+
+
+static_always_inline
+void lb_hash_get(lb_hash_t *h, u64 k[5], u32 hash, u32 time_now, u32 *available_index, u32 *value)
+{
+ lb_hash_entry_t *e = &h->entries[hash & h->buckets_mask];
+ u32 i;
+ *value = ~0;
+ *available_index = ~0;
+ CLIB_PREFETCH (&(e[1]), sizeof(lb_hash_entry_t), STORE);
+ for (i=0; i<LBHASH_ENTRY_PER_BUCKET; i++) {
+ CLIB_PREFETCH (&(e[i+2]), sizeof(lb_hash_entry_t), STORE); //+2 somehow performs best
+ u64 cmp =
+ (e[i].key[0] ^ k[0]) |
+ (e[i].key[1] ^ k[1]) |
+ (e[i].key[2] ^ k[2]) |
+ (e[i].key[3] ^ k[3]) |
+ (e[i].key[4] ^ k[4]);
+
+ u8 timeouted = clib_u32_loop_gt(time_now, e[i].last_seen + h->timeout);
+
+ *value = (cmp || timeouted)?*value:e[i].value;
+ e[i].last_seen = (cmp || timeouted)?e[i].last_seen:time_now;
+ *available_index = (timeouted && (*available_index == ~0))?(&e[i] - h->entries):*available_index;
+
+ if (!cmp)
+ return;
+ }
+}
+
+static_always_inline
+u32 lb_hash_available_value(lb_hash_t *h, u32 available_index)
+{
+ return h->entries[available_index].value;
+}
+
+static_always_inline
+u32 lb_hash_put(lb_hash_t *h, u64 k[5], u32 value, u32 available_index, u32 time_now)
+{
+ lb_hash_entry_t *e = &h->entries[available_index];
+ e->key[0] = k[0];
+ e->key[1] = k[1];
+ e->key[2] = k[2];
+ e->key[3] = k[3];
+ e->key[4] = k[4];
+ e->value = value;
+ e->last_seen = time_now;
+ return 0;
+}
+
+static_always_inline
+u32 lb_hash_elts(lb_hash_t *h, u32 time_now)
+{
+ u32 tot = 0;
+ lb_hash_entry_t *e;
+ lb_hash_foreach_valid_entry(h, e, time_now) {
+ tot++;
+ }
+ return tot;
+}
+
+#endif /* LB_PLUGIN_LB_LBHASH_H_ */
--- /dev/null
+/*
+ * 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 <lb/lb.h>
+
+#include <vnet/gre/packet.h>
+#include <lb/lbhash.h>
+
+#define foreach_lb_error \
+ _(NONE, "no error") \
+ _(PROTO_NOT_SUPPORTED, "protocol not supported") \
+ _(NO_SERVER, "no configured application server")
+
+typedef enum {
+#define _(sym,str) LB_ERROR_##sym,
+ foreach_lb_error
+#undef _
+ LB_N_ERROR,
+} lb_error_t;
+
+static char *lb_error_strings[] = {
+#define _(sym,string) string,
+ foreach_lb_error
+#undef _
+};
+
+typedef enum {
+ LB_NEXT_LOOKUP,
+ LB_NEXT_DROP,
+ LB_N_NEXT,
+} lb_next_t;
+
+typedef struct {
+ u32 vip_index;
+ u32 as_index;
+} lb_trace_t;
+
+u8 *lb_format_adjacency(u8 * s,
+ struct ip_lookup_main_t * lm,
+ ip_adjacency_t *adj)
+{
+ lb_main_t *lbm = &lb_main;
+ lb_adj_data_t *ad = (lb_adj_data_t *) &adj->opaque;
+ __attribute__((unused)) lb_vip_t *vip = pool_elt_at_index (lbm->vips, ad->vip_index);
+ return format(s, "idx:%d", ad->vip_index);
+}
+
+u8 *
+format_lb_trace (u8 * s, va_list * args)
+{
+ lb_main_t *lbm = &lb_main;
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ lb_trace_t *t = va_arg (*args, lb_trace_t *);
+ s = format(s, "lb vip[%d]: %U\n", t->vip_index, format_lb_vip, &lbm->vips[t->vip_index]);
+ s = format(s, "lb as[%d]: %U\n", t->as_index, format_lb_as, &lbm->ass[t->as_index]);
+ return s;
+}
+
+lb_hash_t *lb_get_sticky_table(u32 cpu_index)
+{
+ lb_main_t *lbm = &lb_main;
+ lb_hash_t *sticky_ht = lbm->per_cpu[cpu_index].sticky_ht;
+ //Check if size changed
+ if (PREDICT_FALSE(sticky_ht && (lbm->per_cpu_sticky_buckets != lb_hash_nbuckets(sticky_ht)))) {
+
+ //Dereference everything in there
+ lb_hash_entry_t *e;
+ lb_hash_foreach_entry(sticky_ht, e) {
+ vlib_refcount_add(&lbm->as_refcount, cpu_index, e->value, -1);
+ vlib_refcount_add(&lbm->as_refcount, cpu_index, 0, -1);
+ }
+
+ lb_hash_free(sticky_ht);
+ sticky_ht = NULL;
+ }
+
+ //Create if necessary
+ if (PREDICT_FALSE(sticky_ht == NULL)) {
+ lbm->per_cpu[cpu_index].sticky_ht = lb_hash_alloc(lbm->per_cpu_sticky_buckets, lbm->flow_timeout);
+ sticky_ht = lbm->per_cpu[cpu_index].sticky_ht;
+ clib_warning("Regenerated sticky table %p", sticky_ht);
+ }
+
+ ASSERT(sticky_ht);
+
+ //Update timeout
+ sticky_ht->timeout = lbm->flow_timeout;
+ return sticky_ht;
+}
+
+static_always_inline uword
+lb_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame,
+ u8 is_input_v4, //Compile-time parameter stating that is input is v4 (or v6)
+ u8 is_encap_v4) //Compile-time parameter stating that is GRE encap is v4 (or v6)
+{
+ ip_lookup_main_t *lm = (is_input_v4)?&ip4_main.lookup_main:&ip6_main.lookup_main;
+ lb_main_t *lbm = &lb_main;
+ vlib_node_runtime_t *error_node = node;
+ u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
+ u32 cpu_index = os_get_cpu_number();
+ u32 lb_time = lb_hash_time_now(vm);
+
+ lb_hash_t *sticky_ht = lb_get_sticky_table(cpu_index);
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 pi0;
+ vlib_buffer_t *p0;
+ ip_adjacency_t *adj0;
+ lb_adj_data_t *ad0;
+ lb_vip_t *vip0;
+ lb_as_t *as0;
+ gre_header_t *gre0;
+ u16 len0;
+ u32 value0, available_index0, hash0;
+ u64 key0[5];
+ lb_error_t error0 = LB_ERROR_NONE;
+ lb_next_t next0 = LB_NEXT_LOOKUP;
+
+ if (PREDICT_TRUE(n_left_from > 1))
+ {
+ vlib_buffer_t *p2;
+ p2 = vlib_get_buffer(vm, from[1]);
+ vlib_prefetch_buffer_header(p2, STORE);
+ /* IPv4 + 8 = 28. possibly plus -40 */
+ CLIB_PREFETCH (vlib_buffer_get_current(p2) - 40, 128, STORE);
+ }
+
+ pi0 = to_next[0] = from[0];
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ p0 = vlib_get_buffer (vm, pi0);
+ adj0 = ip_get_adjacency (lm, vnet_buffer (p0)->ip.adj_index[VLIB_TX]);
+ ad0 = (lb_adj_data_t *) &adj0->opaque;
+ vip0 = pool_elt_at_index (lbm->vips, ad0->vip_index);
+
+ if (is_input_v4) {
+ ip4_header_t *ip40;
+ ip40 = vlib_buffer_get_current (p0);
+ len0 = clib_net_to_host_u16(ip40->length);
+ key0[0] = (u64) ip40->src_address.as_u32;
+ key0[1] = (u64) ip40->dst_address.as_u32;
+ key0[2] = 0;
+ key0[3] = 0;
+ key0[4] = ((u64)((udp_header_t *)(ip40 + 1))->src_port << 32) |
+ ((u64)((udp_header_t *)(ip40 + 1))->dst_port << 16);
+
+ hash0 = lb_hash_hash(key0);
+ } else {
+ ip6_header_t *ip60;
+ ip60 = vlib_buffer_get_current (p0);
+ len0 = clib_net_to_host_u16(ip60->payload_length) + sizeof(ip6_header_t);
+ key0[0] = ip60->src_address.as_u64[0];
+ key0[1] = ip60->src_address.as_u64[1];
+ key0[2] = ip60->dst_address.as_u64[0];
+ key0[3] = ip60->dst_address.as_u64[1];
+ key0[4] = ((u64)((udp_header_t *)(ip60 + 1))->src_port << 32) |
+ ((u64)((udp_header_t *)(ip60 + 1))->dst_port << 16);
+
+ hash0 = lb_hash_hash(key0);
+ }
+
+ //NOTE: This is an ugly trick to not include the VIP index in the hash calculation
+ //but actually use it in the key determination.
+ key0[4] |= ((vip0 - lbm->vips));
+
+ lb_hash_get(sticky_ht, key0, hash0, lb_time, &available_index0, &value0);
+ if (PREDICT_TRUE(value0 != ~0)) {
+ //Found an existing entry
+ as0 = &lbm->ass[value0];
+ } else if (PREDICT_TRUE(available_index0 != ~0)) {
+ //There is an available slot for a new flow
+ as0 = &lbm->ass[vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index];
+ if (PREDICT_FALSE(as0 == lbm->ass)) { //Special first element
+ error0 = LB_ERROR_NO_SERVER;
+ next0 = LB_NEXT_DROP;
+ } else {
+ vlib_increment_simple_counter(&lbm->vip_counters[LB_VIP_COUNTER_TRACKED_SESSION],
+ cpu_index, vip0 - lbm->vips, 1);
+ }
+
+ //TODO: There are race conditions with as0 and vip0 manipulation.
+ //Configuration may be changed, vectors resized, etc...
+
+ //Dereference previously used
+ vlib_refcount_add(&lbm->as_refcount, cpu_index, lb_hash_available_value(sticky_ht, available_index0), -1);
+ vlib_refcount_add(&lbm->as_refcount, cpu_index, as0 - lbm->ass, 1);
+
+ //Add sticky entry
+ //Note that when there is no AS configured, an entry is configured anyway.
+ //But no configured AS is not something that should happen
+ lb_hash_put(sticky_ht, key0, as0 - lbm->ass, available_index0, lb_time);
+ } else {
+ //Could not store new entry in the table
+ as0 = &lbm->ass[vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index];
+ vlib_increment_simple_counter(&lbm->vip_counters[LB_VIP_COUNTER_UNTRACKED_PACKET],
+ cpu_index, vip0 - lbm->vips, 1);
+ }
+
+ //Now let's encap
+ if (is_encap_v4) {
+ ip4_header_t *ip40;
+ vlib_buffer_advance(p0, - sizeof(ip4_header_t) - sizeof(gre_header_t));
+ ip40 = vlib_buffer_get_current(p0);
+ gre0 = (gre_header_t *)(ip40 + 1);
+ ip40->src_address = lbm->ip4_src_address;
+ ip40->dst_address = as0->address.ip4;
+ ip40->ip_version_and_header_length = 0x45;
+ ip40->ttl = 128;
+ ip40->length = clib_host_to_net_u16(len0 + sizeof(gre_header_t) + sizeof(ip4_header_t));
+ ip40->protocol = IP_PROTOCOL_GRE;
+ ip40->checksum = ip4_header_checksum (ip40);
+ } else {
+ ip6_header_t *ip60;
+ vlib_buffer_advance(p0, - sizeof(ip6_header_t) - sizeof(gre_header_t));
+ ip60 = vlib_buffer_get_current(p0);
+ gre0 = (gre_header_t *)(ip60 + 1);
+ ip60->dst_address = as0->address.ip6;
+ ip60->src_address = lbm->ip6_src_address;
+ ip60->hop_limit = 128;
+ ip60->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6<<28);
+ ip60->payload_length = clib_host_to_net_u16(len0 + sizeof(gre_header_t));
+ ip60->protocol = IP_PROTOCOL_GRE;
+ }
+
+ gre0->flags_and_version = 0;
+ gre0->protocol = (is_input_v4)?
+ clib_host_to_net_u16(0x0800):
+ clib_host_to_net_u16(0x86DD);
+
+ if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ lb_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
+ tr->as_index = as0 - lbm->ass;
+ tr->vip_index = ad0->vip_index;
+ }
+
+ p0->error = error_node->errors[error0];
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, next0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return frame->n_vectors;
+}
+
+static uword
+lb6_gre6_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return lb_node_fn(vm, node, frame, 0, 0);
+}
+
+static uword
+lb6_gre4_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return lb_node_fn(vm, node, frame, 0, 1);
+}
+
+static uword
+lb4_gre6_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return lb_node_fn(vm, node, frame, 1, 0);
+}
+
+static uword
+lb4_gre4_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return lb_node_fn(vm, node, frame, 1, 1);
+}
+
+VLIB_REGISTER_NODE (lb6_gre6_node) =
+{
+ .function = lb6_gre6_node_fn,
+ .name = "lb6-gre6",
+ .vector_size = sizeof (u32),
+ .format_trace = format_lb_trace,
+
+ .n_errors = LB_N_ERROR,
+ .error_strings = lb_error_strings,
+
+ .n_next_nodes = LB_N_NEXT,
+ .next_nodes =
+ {
+ [LB_NEXT_LOOKUP] = "ip6-lookup",
+ [LB_NEXT_DROP] = "error-drop"
+ },
+};
+
+VNET_IP6_REGISTER_ADJACENCY(lb6_gre6) = {
+ .node_name = "lb6-gre6",
+ .fn = lb_format_adjacency,
+ .next_index = &lb_main.ip_lookup_next_index[LB_VIP_TYPE_IP6_GRE6]
+};
+
+VLIB_REGISTER_NODE (lb6_gre4_node) =
+{
+ .function = lb6_gre4_node_fn,
+ .name = "lb6-gre4",
+ .vector_size = sizeof (u32),
+ .format_trace = format_lb_trace,
+
+ .n_errors = LB_N_ERROR,
+ .error_strings = lb_error_strings,
+
+ .n_next_nodes = LB_N_NEXT,
+ .next_nodes =
+ {
+ [LB_NEXT_LOOKUP] = "ip4-lookup",
+ [LB_NEXT_DROP] = "error-drop"
+ },
+};
+
+VNET_IP6_REGISTER_ADJACENCY(lb6_gre4) = {
+ .node_name = "lb6-gre4",
+ .fn = lb_format_adjacency,
+ .next_index = &lb_main.ip_lookup_next_index[LB_VIP_TYPE_IP6_GRE4]
+};
+
+VLIB_REGISTER_NODE (lb4_gre6_node) =
+{
+ .function = lb4_gre6_node_fn,
+ .name = "lb4-gre6",
+ .vector_size = sizeof (u32),
+ .format_trace = format_lb_trace,
+
+ .n_errors = LB_N_ERROR,
+ .error_strings = lb_error_strings,
+
+ .n_next_nodes = LB_N_NEXT,
+ .next_nodes =
+ {
+ [LB_NEXT_LOOKUP] = "ip6-lookup",
+ [LB_NEXT_DROP] = "error-drop"
+ },
+};
+
+VNET_IP4_REGISTER_ADJACENCY(lb4_gre6) = {
+ .node_name = "lb4-gre6",
+ .fn = lb_format_adjacency,
+ .next_index = &lb_main.ip_lookup_next_index[LB_VIP_TYPE_IP4_GRE6]
+};
+
+VLIB_REGISTER_NODE (lb4_gre4_node) =
+{
+ .function = lb4_gre4_node_fn,
+ .name = "lb4-gre4",
+ .vector_size = sizeof (u32),
+ .format_trace = format_lb_trace,
+
+ .n_errors = LB_N_ERROR,
+ .error_strings = lb_error_strings,
+
+ .n_next_nodes = LB_N_NEXT,
+ .next_nodes =
+ {
+ [LB_NEXT_LOOKUP] = "ip4-lookup",
+ [LB_NEXT_DROP] = "error-drop"
+ },
+};
+
+VNET_IP4_REGISTER_ADJACENCY(lb4_gre4) = {
+ .node_name = "lb4-gre4",
+ .fn = lb_format_adjacency,
+ .next_index = &lb_main.ip_lookup_next_index[LB_VIP_TYPE_IP4_GRE4]
+};
--- /dev/null
+/*
+ * 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 <lb/refcount.h>
+
+void __vlib_refcount_resize(vlib_refcount_per_cpu_t *per_cpu, u32 size)
+{
+ u32 *new_counter = 0, *old_counter;
+ vec_validate(new_counter, size);
+ memcpy(new_counter, per_cpu->counters, per_cpu->length);
+ old_counter = per_cpu->counters;
+ per_cpu->counters = new_counter;
+ CLIB_MEMORY_BARRIER();
+ per_cpu->length = vec_len(new_counter);
+ vec_free(old_counter);
+}
+
+u64 vlib_refcount_get(vlib_refcount_t *r, u32 index)
+{
+ u64 count = 0;
+ vlib_thread_main_t *tm = vlib_get_thread_main ();
+ u32 cpu_index;
+ for (cpu_index = 0; cpu_index < tm->n_vlib_mains; cpu_index++) {
+ if (r->per_cpu[cpu_index].length > index)
+ count += r->per_cpu[cpu_index].counters[index];
+ }
+ return count;
+}
+
--- /dev/null
+/*
+ * 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.
+ */
+
+/*
+ * vlib provides lock-free counters but those
+ * - Have 16bits per-CPU counter, which may overflow.
+ * - Would only increment.
+ *
+ * This is very similar to vlib counters, but may be used to count reference.
+ * Such a counter includes an arbitrary number of counters. Each counter
+ * is identified by its index. This is used to aggregate per-cpu memory.
+ *
+ * Warning:
+ * This reference counter is lock-free but is not race-condition free.
+ * The counting result is approximate and another mechanism needs to be used
+ * in order to ensure that an object may be freed.
+ *
+ */
+
+#include <vnet/vnet.h>
+
+typedef struct {
+ u32 *counters;
+ u32 length;
+ u32 *reader_lengths;
+ CLIB_CACHE_LINE_ALIGN_MARK(o);
+} vlib_refcount_per_cpu_t;
+
+typedef struct {
+ vlib_refcount_per_cpu_t *per_cpu;
+} vlib_refcount_t;
+
+void __vlib_refcount_resize(vlib_refcount_per_cpu_t *per_cpu, u32 size);
+
+static_always_inline
+void vlib_refcount_add(vlib_refcount_t *r, u32 cpu_index, u32 counter_index, i32 v)
+{
+ vlib_refcount_per_cpu_t *per_cpu = &r->per_cpu[cpu_index];
+ if (PREDICT_FALSE(counter_index >= per_cpu->length))
+ __vlib_refcount_resize(per_cpu, clib_max(counter_index + 16, per_cpu->length * 2));
+
+ per_cpu->counters[counter_index] += v;
+}
+
+u64 vlib_refcount_get(vlib_refcount_t *r, u32 index);
+
+static_always_inline
+void vlib_refcount_init(vlib_refcount_t *r)
+{
+ vlib_thread_main_t *tm = vlib_get_thread_main ();
+ r->per_cpu = 0;
+ vec_validate (r->per_cpu, tm->n_vlib_mains - 1);
+}
+
+
--- /dev/null
+/*
+ * 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 <lb/util.h>
+
+void ip46_prefix_normalize(ip46_address_t *prefix, u8 plen)
+{
+ if (plen == 0) {
+ prefix->as_u64[0] = 0;
+ prefix->as_u64[1] = 0;
+ } else if (plen <= 64) {
+ prefix->as_u64[0] &= clib_host_to_net_u64(0xffffffffffffffffL << (64 - plen));
+ prefix->as_u64[1] = 0;
+ } else {
+ prefix->as_u64[1] &= clib_host_to_net_u64(0xffffffffffffffffL << (128 - plen));
+ }
+
+}
+
+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;
+}
+
+u8 *format_ip46_prefix (u8 * s, va_list * args)
+{
+ ip46_address_t *ip46 = va_arg (*args, ip46_address_t *);
+ u32 len = va_arg (*args, u32); //va_arg cannot use u8 or u16
+ ip46_type_t type = va_arg (*args, ip46_type_t);
+
+ int is_ip4 = 0;
+ if (type == IP46_TYPE_IP4)
+ is_ip4 = 1;
+ else if (type == IP46_TYPE_IP6)
+ is_ip4 = 0;
+ else
+ is_ip4 = (len >= 96) && ip46_address_is_ip4(ip46);
+
+ return is_ip4 ?
+ format(s, "%U/%d", format_ip4_address, &ip46->ip4, len - 96):
+ format(s, "%U/%d", format_ip6_address, &ip46->ip6, len);
+}
+
--- /dev/null
+/*
+ * 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.
+ */
+
+/*
+ * Non-LB specific stuff comes here
+ */
+
+#ifndef LB_PLUGIN_LB_UTIL_H_
+#define LB_PLUGIN_LB_UTIL_H_
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+
+#define ip46_address_type(ip46) (ip46_address_is_ip4(ip46)?IP46_TYPE_IP4:IP46_TYPE_IP6)
+#define ip46_prefix_is_ip4(ip46, len) ((len) >= 96 && ip46_address_is_ip4(ip46))
+#define ip46_prefix_type(ip46, len) (ip46_prefix_is_ip4(ip46, len)?IP46_TYPE_IP4:IP46_TYPE_IP6)
+
+void ip46_prefix_normalize(ip46_address_t *prefix, u8 plen);
+uword unformat_ip46_prefix (unformat_input_t * input, va_list * args);
+u8 *format_ip46_prefix (u8 * s, va_list * args);
+
+/**
+ * 32 bits integer comparison for running values.
+ * 1 > 0 is true. But 1 > 0xffffffff also is.
+ */
+#define clib_u32_loop_gt(a, b) (((u32)(a)) - ((u32)(b)) < 0x7fffffff)
+
+#endif /* LB_PLUGIN_LB_UTIL_H_ */
_(CANNOT_CREATE_PCAP_FILE, -93, "Cannot create pcap file") \
_(INCORRECT_ADJACENCY_TYPE, -94, "Invalid adjacency type for this operation") \
_(EXCEEDED_NUMBER_OF_RANGES_CAPACITY, -95, "Operation would exceed configured capacity of ranges") \
-_(EXCEEDED_NUMBER_OF_PORTS_CAPACITY, -96, "Operation would exceed capacity of number of ports")
+_(EXCEEDED_NUMBER_OF_PORTS_CAPACITY, -96, "Operation would exceed capacity of number of ports") \
+_(INVALID_ADDRESS_FAMILY, -97, "Invalid address family")
typedef enum
{
Code Review / vpp.git / commitdiff