---
project: 'csit'
project_creation_date: '2016-01-05'
project_category: ''
lifecycle_state: 'Incubation'
project_lead: &csit_ptl
name: 'Maciek Konstantynowicz'
email: 'mkonstan@cisco.com'
id: 'mackonstan'
company: 'cisco'
timezone: ''
primary_contact: *csit_ptl
issue_tracking:
type: 'jira'
url: 'https://jira.fd.io/secure/RapidBoard.jspa'
key: 'CSIT'
mailing_list:
type: 'groups.io'
url: 'https://lists.fd.io/g/csit-dev'
tag: 'n/a'
realtime_discussion:
type: 'irc'
server: 'freenode'
channel: 'fdio-csit'
meetings:
- type: 'zoom'
agenda: 'https://wiki.fd.io/view/CSIT/Meeting'
url: 'https://wiki.fd.io/view/CSIT/Meeting'
server: 'n/a'
channel: 'fdio-csit'
repeats: 'weekly'
time: '14:00 UTC'
repositories:
- 'csit'
committers:
- <<: *csit_ptl
- name: 'Carsten
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/*
* Copyright (c) 2018 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 <plugins/svs/svs.h>
#include <vlib/vlib.h>
#include <vnet/plugin/plugin.h>
#include <vnet/fib/fib_table.h>
#include <vnet/fib/ip6_fib.h>
#include <vnet/fib/ip4_fib.h>
#include <vnet/dpo/lookup_dpo.h>
#include <vnet/dpo/load_balance.h>
#include <vnet/dpo/load_balance_map.h>
u32 *svs_itf_db[FIB_PROTOCOL_IP_MAX];
static fib_source_t svs_fib_src;
int
svs_table_add (fib_protocol_t fproto, u32 table_id)
{
fib_table_find_or_create_and_lock (fproto, table_id, svs_fib_src);
return (0);
}
int
svs_table_delete (fib_protocol_t fproto, u32 table_id)
{
u32 fib_index, ii;
fib_index = fib_table_find (fproto, table_id);
vec_foreach_index (ii, svs_itf_db[fproto])
{
if (svs_itf_db[fproto][ii] == fib_index)
return VNET_API_ERROR_INSTANCE_IN_USE;
}
if (~0 == fib_index)
return VNET_API_ERROR_NO_SUCH_FIB;
fib_table_unlock (fib_index, fproto, svs_fib_src);
return (0);
}
static int
svs_route_add_i (u32 fib_index, const fib_prefix_t * pfx, u32 src_fib_index)
{
dpo_id_t dpo = DPO_INVALID;
lookup_dpo_add_or_lock_w_fib_index (src_fib_index,
fib_proto_to_dpo (pfx->fp_proto),
LOOKUP_UNICAST,
LOOKUP_INPUT_SRC_ADDR,
LOOKUP_TABLE_FROM_CONFIG, &dpo);
fib_table_entry_special_dpo_add (fib_index, pfx,
svs_fib_src,
FIB_ENTRY_FLAG_EXCLUSIVE, &dpo);
dpo_unlock (&dpo);
return (0);
}
int
svs_route_add (u32 table_id, const fib_prefix_t * pfx, u32 source_table_id)
{
u32 fib_index, src_fib_index;
int rv;
fib_index = fib_table_find (pfx->fp_proto, table_id);
if (~0 == fib_index)
return VNET_API_ERROR_NO_SUCH_FIB;
src_fib_index = fib_table_find (pfx->fp_proto, source_table_id);
if (~0 == src_fib_index)
return (VNET_API_ERROR_NO_SUCH_FIB);
rv = svs_route_add_i (fib_index, pfx, src_fib_index);
return (rv);
}
int
svs_route_delete (u32 table_id, const fib_prefix_t * pfx)
{
u32 fib_index;
fib_index = fib_table_find (pfx->fp_proto, table_id);
if (~0 == fib_index)
return VNET_API_ERROR_NO_SUCH_FIB;
fib_table_entry_special_remove (fib_index, pfx, svs_fib_src);
return (0);
}
int
svs_enable (fib_protocol_t fproto, u32 table_id, u32 sw_if_index)
{
fib_prefix_t pfx = {
.fp_proto = fproto,
};
u32 fib_index;
fib_index = fib_table_find (fproto, table_id);
if (~0 == fib_index)
return VNET_API_ERROR_NO_SUCH_FIB;
/*
* now we know which interface the table will serve, we can add the default
* route to use the table that the interface is bound to.
*/
svs_route_add_i (fib_index, &pfx,
fib_table_get_index_for_sw_if_index (fproto, sw_if_index));
vec_validate_init_empty (svs_itf_db[fproto], sw_if_index, ~0);
svs_itf_db[fproto][sw_if_index] = fib_index;
vnet_feature_enable_disable ((FIB_PROTOCOL_IP4 == fproto ?
"ip4-unicast" :
"ip6-unicast"),
(FIB_PROTOCOL_IP4 == fproto ?
"svs-ip4" :
"svs-ip6"), sw_if_index, 1, NULL, 0);
return (0);
}
static void
svs_table_bind (fib_protocol_t fproto, u32 sw_if_index, u32 itf_fib_index)
{
/*
* update the default route to use the interface's newly bound FIB
*/
u32 svs_fib_index;
if (sw_if_index >= vec_len (svs_itf_db[FIB_PROTOCOL_IP6]))
return;
svs_fib_index = svs_itf_db[FIB_PROTOCOL_IP6][sw_if_index];
if (~0 != svs_fib_index)
{
fib_prefix_t pfx = {
.fp_proto = fproto,
};
svs_route_add (svs_fib_index, &pfx, itf_fib_index);
}
/*
* else
* no SVS enable on this interface
*/
}
static void
svs_ip6_table_bind (ip6_main_t * im,
uword opaque,
u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
{
svs_table_bind (FIB_PROTOCOL_IP6, sw_if_index, new_fib_index);
}
static void
svs_ip4_table_bind (ip4_main_t * im,
uword opaque,
u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
{
svs_table_bind (FIB_PROTOCOL_IP4, sw_if_index, new_fib_index);
}
int
svs_disable (fib_protocol_t fproto, u32 table_id, u32 sw_if_index)
{
fib_prefix_t pfx = {
.fp_proto = fproto,
};
u32 fib_index;
fib_index = fib_table_find (fproto, table_id);
if (~0 == fib_index)
return VNET_API_ERROR_NO_SUCH_FIB;
if (sw_if_index >= vec_len (svs_itf_db[fproto]))
return VNET_API_ERROR_INVALID_SW_IF_INDEX;
svs_itf_db[fproto][sw_if_index] = ~0;
vnet_feature_enable_disable ((FIB_PROTOCOL_IP4 == fproto ?
"ip4-unicast" :
"ip6-unicast"),
(FIB_PROTOCOL_IP4 == fproto ?
"svs-ip4" :
"svs-ip6"), sw_if_index, 0, NULL, 0);
fib_table_entry_special_remove (fib_index, &pfx, svs_fib_src);
return (0);
}
void
svs_walk (svs_walk_fn_t fn, void *ctx)
{
fib_protocol_t fproto;
u32 ii, fib_index;
FOR_EACH_FIB_IP_PROTOCOL (fproto)
{
vec_foreach_index (ii, svs_itf_db[fproto])
{
fib_index = svs_itf_db[fproto][ii];
if (~0 != fib_index)
{
if (WALK_CONTINUE != fn (fproto,
fib_table_get_table_id (fib_index, fproto),
ii, ctx))
return;
}
}
}
}
typedef enum svs_next_t_
{
SVS_NEXT_DROP,
SVS_N_NEXT,
} svs_next_t;
typedef struct svs_input_trace_t_
{
u32 fib_index;
} svs_input_trace_t;
always_inline uword
svs_input_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame, fib_protocol_t fproto)
{
u32 n_left_from, *from, *to_next, next_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
const load_balance_t *lb0;
const lookup_dpo_t *lk0;
u32 bi0, sw_if_index0;
const dpo_id_t *dpo0;
vlib_buffer_t *b0;
svs_next_t next0;
index_t lbi0;
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
if (FIB_PROTOCOL_IP4 == fproto)
{
ip4_header_t *ip0;
ip0 = vlib_buffer_get_current (b0);
lbi0 =
ip4_fib_forwarding_lookup (svs_itf_db[fproto][sw_if_index0],
&ip0->src_address);
}
else
{
ip6_header_t *ip0;
ip0 = vlib_buffer_get_current (b0);
lbi0 = ip6_fib_table_fwding_lookup (svs_itf_db[fproto]
[sw_if_index0],
&ip0->src_address);
}
lb0 = load_balance_get (lbi0);
dpo0 = load_balance_get_fwd_bucket (lb0, 0);
lk0 = lookup_dpo_get (dpo0->dpoi_index);
vnet_buffer (b0)->sw_if_index[VLIB_TX] = lk0->lkd_fib_index;
vnet_feature_next (&next0, b0);
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
svs_input_trace_t *tr;
tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->fib_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
}
/* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next, bi0,
next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return frame->n_vectors;
}
static uword
svs_input_ip4 (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return svs_input_inline (vm, node, frame, FIB_PROTOCOL_IP4);
}
static uword
svs_input_ip6 (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return svs_input_inline (vm, node, frame, FIB_PROTOCOL_IP6);
}
static u8 *
format_svs_input_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
svs_input_trace_t *t = va_arg (*args, svs_input_trace_t *);
s = format (s, " fib_index %d", t->fib_index);
return s;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (svs_ip4_node) =
{
.function = svs_input_ip4,
.name = "svs-ip4",
.vector_size = sizeof (u32),
.format_trace = format_svs_input_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_next_nodes = SVS_N_NEXT,
.next_nodes =
{
[SVS_NEXT_DROP] = "error-drop",
}
};
VLIB_REGISTER_NODE (svs_ip6_node) =
{
.function = svs_input_ip6,
.name = "svs-ip6",
.vector_size = sizeof (u32),
.format_trace = format_svs_input_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.next_nodes =
{
[SVS_NEXT_DROP] = "error-drop",
}
};
VNET_FEATURE_INIT (svs_ip4_feat, static) =
{
.arc_name = "ip4-unicast",
.node_name = "svs-ip4",
};
VNET_FEATURE_INIT (svs_ip6_feat, static) =
{
.arc_name = "ip6-unicast",
.node_name = "svs-ip6",
};
/* *INDENT-ON* */
static clib_error_t *
svs_table_cli (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
fib_protocol_t fproto;
u32 table_id;
u8 add;
fproto = FIB_PROTOCOL_IP4;
table_id = ~0;
add = 1;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "add"))
add = 1;
else if (unformat (input, "del"))
add = 0;
else if (unformat (input, "ip4"))
fproto = FIB_PROTOCOL_IP4;
else if (unformat (input, "ip6"))
fproto = FIB_PROTOCOL_IP6;
else if (unformat (input, "table-id %d", &table_id))
;
else
break;
}
if (~0 == table_id)
return clib_error_return (0, "table-id must be specified");
if (add)
svs_table_add (fproto, table_id);
else
svs_table_delete (fproto, table_id);
return (NULL);
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (svs_table_cmd_cli, static) = {
.path = "svs table",
.short_help = "Source VRF select table [add|delete] [ip4|ip6] table-id X",
.function = svs_table_cli,
};
/* *INDENT-ON* */
static clib_error_t *
svs_enable_cli (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
u32 sw_if_index, table_id;
fib_protocol_t fproto;
vnet_main_t *vnm;
u8 enable;
vnm = vnet_get_main ();
sw_if_index = table_id = ~0;
fproto = FIB_PROTOCOL_IP4;
enable = 1;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "%U", unformat_vnet_sw_interface,
vnm, &sw_if_index))
;
else if (unformat (input, "enable"))
enable = 1;
else if (unformat (input, "disable"))
enable = 0;
else if (unformat (input, "ip4"))
fproto = FIB_PROTOCOL_IP4;
else if (unformat (input, "ip6"))
fproto = FIB_PROTOCOL_IP6;
else if (unformat (input, "table-id %d", &table_id))
;
else
break;
}
if (~0 == sw_if_index)
return clib_error_return (0, "interface must be specified");
if (~0 == table_id)
return clib_error_return (0, "table-id must be specified");
if (enable)
svs_enable (fproto, table_id, sw_if_index);
else
svs_disable (fproto, table_id, sw_if_index);
return (NULL);
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (svs_enable_cli_cmd, static) = {
.path = "svs enable",
.short_help = "Source VRF select [enable|disable] [ip4|ip6] <table-id> X <interface>",
.function = svs_enable_cli,
};
/* *INDENT-ON* */
static clib_error_t *
svs_route_cli (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
u32 table_id, src_table_id;
fib_prefix_t pfx;
int rv;
u8 add;
src_table_id = table_id = ~0;
add = 1;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "add"))
add = 1;
else if (unformat (input, "del"))
add = 0;
else if (unformat (input, "table-id %d", &table_id))
;
else if (unformat (input, "src-table-id %d", &src_table_id))
;
else if (unformat (input, "%U/%d",
unformat_ip4_address, &pfx.fp_addr.ip4, &pfx.fp_len))
{
pfx.fp_proto = FIB_PROTOCOL_IP4;
}
else if (unformat (input, "%U/%d",
unformat_ip6_address, &pfx.fp_addr.ip6, &pfx.fp_len))
{
pfx.fp_proto = FIB_PROTOCOL_IP6;
}
else
break;
}
if (~0 == table_id)
return clib_error_return (0, "table-id must be specified");
if (~0 == src_table_id)
return clib_error_return (0, "src-table-id must be specified");
if (add)
rv = svs_route_add (table_id, &pfx, src_table_id);
else
rv = svs_route_delete (table_id, &pfx);
if (rv != 0)
return clib_error_return (0,
"failed, rv=%d:%U",
(int) rv, format_vnet_api_errno, rv);
return (NULL);
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (svs_route_cmd_cli, static) = {
.path = "svs route",
.short_help = "Source VRF select route [add|delete] <table-id> <prefix> <src-table-id>",
.function = svs_route_cli,
};
/* *INDENT-ON* */
static clib_error_t *
svs_show_cli (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
fib_protocol_t fproto;
u32 ii;
vlib_cli_output (vm, "Source VRF select interface to fib-index mappings:");
FOR_EACH_FIB_IP_PROTOCOL (fproto)
{
vlib_cli_output (vm, " %U", format_fib_protocol, fproto);
vec_foreach_index (ii, svs_itf_db[fproto])
{
if (~0 != svs_itf_db[fproto][ii])
vlib_cli_output (vm, " %U -> %d", format_vnet_sw_if_index_name,
vnet_get_main (), ii, svs_itf_db[fproto][ii]);
}
}
return (NULL);
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (svs_show_cli_cmd, static) = {
.path = "show svs",
.short_help = "Source VRF select show",
.function = svs_show_cli,
};
/* *INDENT-ON* */
static clib_error_t *
svs_init (vlib_main_t * vm)
{
ip6_table_bind_callback_t cbt6 = {
.function = svs_ip6_table_bind,
};
vec_add1 (ip6_main.table_bind_callbacks, cbt6);
ip4_table_bind_callback_t cbt4 = {
.function = svs_ip4_table_bind,
};
vec_add1 (ip4_main.table_bind_callbacks, cbt4);
svs_fib_src = fib_source_allocate ("svs",
FIB_SOURCE_PRIORITY_LOW,
FIB_SOURCE_BH_SIMPLE);
return (NULL);
}
VLIB_INIT_FUNCTION (svs_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
