diff options
author | Sachin Saxena <sachin.saxena@freescale.com> | 2018-02-28 20:28:52 +0530 |
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committer | Sachin Saxena <sachin.saxena@nxp.com> | 2018-02-28 20:34:56 +0530 |
commit | 0689fce93ba269c48f83a2f70f971b3976d04c90 (patch) | |
tree | 4cc2908df3598507cc1828ac19d8c43b22450ffa /src/vnet/span/span.c | |
parent | 746b57564deede624261ab8a96c94f562f24d22c (diff) | |
parent | d594711a5d79859a7d0bde83a516f7ab52051d9b (diff) |
Merge branch 'stable/1710' of https://gerrit.fd.io/r/vpp into 17101710
Diffstat (limited to 'src/vnet/span/span.c')
-rw-r--r-- | src/vnet/span/span.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/src/vnet/span/span.c b/src/vnet/span/span.c new file mode 100644 index 00000000..2fd9cd87 --- /dev/null +++ b/src/vnet/span/span.c @@ -0,0 +1,249 @@ +/* + * 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> + +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: + */ |