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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <vlib/vlib.h>
#include <vppinfra/error.h>
#include <vnet/feature/feature.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/l2_output.h>
#include <vnet/span/span.h>
span_main_t span_main;
typedef enum
{
SPAN_DISABLE = 0,
SPAN_RX = 1,
SPAN_TX = 2,
SPAN_BOTH = SPAN_RX | SPAN_TX
} span_state_t;
static_always_inline u32
span_dst_set (span_mirror_t * sm, u32 dst_sw_if_index, int enable)
{
if (dst_sw_if_index == ~0)
{
ASSERT (enable == 0);
clib_bitmap_zero (sm->mirror_ports);
}
else
sm->mirror_ports =
clib_bitmap_set (sm->mirror_ports, dst_sw_if_index, enable);
u32 last = sm->num_mirror_ports;
sm->num_mirror_ports = clib_bitmap_count_set_bits (sm->mirror_ports);
return last;
}
int
span_add_delete_entry (vlib_main_t * vm,
u32 src_sw_if_index, u32 dst_sw_if_index, u8 state,
span_feat_t sf)
{
span_main_t *sm = &span_main;
if (state > SPAN_BOTH)
return VNET_API_ERROR_UNIMPLEMENTED;
if ((src_sw_if_index == ~0) || (dst_sw_if_index == ~0 && state > 0)
|| (src_sw_if_index == dst_sw_if_index))
return VNET_API_ERROR_INVALID_INTERFACE;
vec_validate_aligned (sm->interfaces, src_sw_if_index,
CLIB_CACHE_LINE_BYTES);
span_interface_t *si = vec_elt_at_index (sm->interfaces, src_sw_if_index);
int rx = ! !(state & SPAN_RX);
int tx = ! !(state & SPAN_TX);
span_mirror_t *rxm = &si->mirror_rxtx[sf][VLIB_RX];
span_mirror_t *txm = &si->mirror_rxtx[sf][VLIB_TX];
u32 last_rx_ports_count = span_dst_set (rxm, dst_sw_if_index, rx);
u32 last_tx_ports_count = span_dst_set (txm, dst_sw_if_index, tx);
int enable_rx = last_rx_ports_count == 0 && rxm->num_mirror_ports == 1;
int disable_rx = last_rx_ports_count > 0 && rxm->num_mirror_ports == 0;
int enable_tx = last_tx_ports_count == 0 && txm->num_mirror_ports == 1;
int disable_tx = last_tx_ports_count > 0 && txm->num_mirror_ports == 0;
switch (sf)
{
case SPAN_FEAT_DEVICE:
if (enable_rx || disable_rx)
vnet_feature_enable_disable ("device-input", "span-input",
src_sw_if_index, rx, 0, 0);
if (enable_tx || disable_tx)
vnet_feature_enable_disable ("interface-output", "span-output",
src_sw_if_index, tx, 0, 0);
break;
case SPAN_FEAT_L2:
if (enable_rx || disable_rx)
l2input_intf_bitmap_enable (src_sw_if_index, L2INPUT_FEAT_SPAN, rx);
if (enable_tx || disable_tx)
l2output_intf_bitmap_enable (src_sw_if_index, L2OUTPUT_FEAT_SPAN, tx);
break;
default:
return VNET_API_ERROR_UNIMPLEMENTED;
}
if (dst_sw_if_index != ~0 && dst_sw_if_index > sm->max_sw_if_index)
sm->max_sw_if_index = dst_sw_if_index;
return 0;
}
static uword
unformat_span_state (unformat_input_t * input, va_list * args)
{
span_state_t *state = va_arg (*args, span_state_t *);
if (unformat (input, "disable"))
*state = SPAN_DISABLE;
else if (unformat (input, "rx"))
*state = SPAN_RX;
else if (unformat (input, "tx"))
*state = SPAN_TX;
else if (unformat (input, "both"))
*state = SPAN_BOTH;
else
return 0;
return 1;
}
static clib_error_t *
set_interface_span_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
span_main_t *sm = &span_main;
u32 src_sw_if_index = ~0;
u32 dst_sw_if_index = ~0;
span_feat_t sf = SPAN_FEAT_DEVICE;
span_state_t state = SPAN_BOTH;
int state_set = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "%U", unformat_vnet_sw_interface,
sm->vnet_main, &src_sw_if_index))
;
else if (unformat (input, "destination %U", unformat_vnet_sw_interface,
sm->vnet_main, &dst_sw_if_index))
;
else if (unformat (input, "%U", unformat_span_state, &state))
{
if (state_set)
return clib_error_return (0, "Multiple mirror states in input");
state_set = 1;
}
else if (unformat (input, "l2"))
sf = SPAN_FEAT_L2;
else
return clib_error_return (0, "Invalid input");
}
int rv =
span_add_delete_entry (vm, src_sw_if_index, dst_sw_if_index, state, sf);
if (rv == VNET_API_ERROR_INVALID_INTERFACE)
return clib_error_return (0, "Invalid interface");
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_interface_span_command, static) = {
.path = "set interface span",
.short_help = "set interface span <if-name> [l2] {disable | destination <if-name> [both|rx|tx]}",
.function = set_interface_span_command_fn,
};
/* *INDENT-ON* */
static clib_error_t *
show_interfaces_span_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
span_main_t *sm = &span_main;
span_interface_t *si;
vnet_main_t *vnm = &vnet_main;
u8 header = 1;
static const char *states[] = {
[SPAN_DISABLE] = "none",
[SPAN_RX] = "rx",
[SPAN_TX] = "tx",
[SPAN_BOTH] = "both"
};
u8 *s = 0;
/* *INDENT-OFF* */
vec_foreach (si, sm->interfaces)
{
span_mirror_t * drxm = &si->mirror_rxtx[SPAN_FEAT_DEVICE][VLIB_RX];
span_mirror_t * dtxm = &si->mirror_rxtx[SPAN_FEAT_DEVICE][VLIB_TX];
span_mirror_t * lrxm = &si->mirror_rxtx[SPAN_FEAT_L2][VLIB_RX];
span_mirror_t * ltxm = &si->mirror_rxtx[SPAN_FEAT_L2][VLIB_TX];
if (drxm->num_mirror_ports || dtxm->num_mirror_ports ||
lrxm->num_mirror_ports || ltxm->num_mirror_ports)
{
u32 i;
clib_bitmap_t *d = clib_bitmap_dup_or (drxm->mirror_ports, dtxm->mirror_ports);
clib_bitmap_t *l = clib_bitmap_dup_or (lrxm->mirror_ports, ltxm->mirror_ports);
clib_bitmap_t *b = clib_bitmap_dup_or (d, l);
if (header)
{
vlib_cli_output (vm, "%-20s %-20s %6s %6s", "Source", "Destination",
"Device", "L2");
header = 0;
}
s = format (s, "%U", format_vnet_sw_if_index_name, vnm,
si - sm->interfaces);
clib_bitmap_foreach (i, b, (
{
int device = (clib_bitmap_get (drxm->mirror_ports, i) +
clib_bitmap_get (dtxm->mirror_ports, i) * 2);
int l2 = (clib_bitmap_get (lrxm->mirror_ports, i) +
clib_bitmap_get (ltxm->mirror_ports, i) * 2);
vlib_cli_output (vm, "%-20v %-20U (%6s) (%6s)", s,
format_vnet_sw_if_index_name, vnm, i,
states[device], states[l2]);
vec_reset_length (s);
}));
clib_bitmap_free (b);
clib_bitmap_free (l);
clib_bitmap_free (d);
}
}
/* *INDENT-ON* */
vec_free (s);
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_interfaces_span_command, static) = {
.path = "show interface span",
.short_help = "Shows SPAN mirror table",
.function = show_interfaces_span_command_fn,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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