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authorDave Barach <dave@barachs.net>2019-04-03 11:20:06 -0400
committerFlorin Coras <florin.coras@gmail.com>2019-04-11 01:19:56 +0000
commit7c91007e1e13b56a29236bd076891709eaa21754 (patch)
treee6d78635a3b53f6db4b0bfa563d98254c464da6f /src/plugins/nsim/nsim.c
parent10dc2eabd6e8a266405aef270a819794a3ddd333 (diff)
Make the loss / delay sim available as an output feature
Add binary api and debug cli support. Rewrite for speed: enqueue vlib_buffer_t's to the wheel, instead of memcpy'ing data. Quad-loop the output feature / x-connect (interior) node. Prefetch wheel entries in the input node. Save packet-generator-based unit-test setup in extras/nsim. Simple config example: set nsim delay 20 ms bandwidth 1 gbit packet-size 1024 nsim output-feature enable-disable GigabitEthernet3/0/0 Change-Id: I852a32d4eb596e7e2aa1d9b30bf3b53525e39fd1 Signed-off-by: Dave Barach <dave@barachs.net>c
Diffstat (limited to 'src/plugins/nsim/nsim.c')
-rw-r--r--src/plugins/nsim/nsim.c214
1 files changed, 185 insertions, 29 deletions
diff --git a/src/plugins/nsim/nsim.c b/src/plugins/nsim/nsim.c
index ce3396c5845..4120585c282 100644
--- a/src/plugins/nsim/nsim.c
+++ b/src/plugins/nsim/nsim.c
@@ -60,15 +60,16 @@ nsim_main_t nsim_main;
/* List of message types that this plugin understands */
-#define foreach_nsim_plugin_api_msg \
-_(NSIM_ENABLE_DISABLE, nsim_enable_disable) \
+#define foreach_nsim_plugin_api_msg \
+_(NSIM_CROSS_CONNECT_ENABLE_DISABLE, nsim_cross_connect_enable_disable) \
+_(NSIM_OUTPUT_FEATURE_ENABLE_DISABLE, nsim_output_feature_enable_disable) \
_(NSIM_CONFIGURE, nsim_configure)
-/* Action function shared between message handler and debug CLI */
+/* Action functions shared between message handlers and debug CLI */
int
-nsim_enable_disable (nsim_main_t * nsm, u32 sw_if_index0,
- u32 sw_if_index1, int enable_disable)
+nsim_cross_connect_enable_disable (nsim_main_t * nsm, u32 sw_if_index0,
+ u32 sw_if_index1, int enable_disable)
{
vnet_sw_interface_t *sw;
vnet_hw_interface_t *hw;
@@ -117,6 +118,41 @@ nsim_enable_disable (nsim_main_t * nsm, u32 sw_if_index0,
return rv;
}
+int
+nsim_output_feature_enable_disable (nsim_main_t * nsm, u32 sw_if_index,
+ int enable_disable)
+{
+ vnet_sw_interface_t *sw;
+ vnet_hw_interface_t *hw;
+ int rv = 0;
+
+ if (nsm->is_configured == 0)
+ return VNET_API_ERROR_CANNOT_ENABLE_DISABLE_FEATURE;
+
+ /* Utterly wrong? */
+ if (pool_is_free_index (nsm->vnet_main->interface_main.sw_interfaces,
+ sw_if_index))
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ /* Not a physical port? */
+ sw = vnet_get_sw_interface (nsm->vnet_main, sw_if_index);
+ if (sw->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ /* Add a graph arc for the input / wheel scraper node */
+ hw = vnet_get_hw_interface (nsm->vnet_main, sw_if_index);
+ vec_validate_init_empty (nsm->output_next_index_by_sw_if_index, sw_if_index,
+ ~0);
+ /* Note: use the tx node, this pkt has already visited the output node... */
+ nsm->output_next_index_by_sw_if_index[sw_if_index] =
+ vlib_node_add_next (nsm->vlib_main, nsim_input_node.index,
+ hw->tx_node_index);
+
+ vnet_feature_enable_disable ("interface-output", "nsim-output-feature",
+ sw_if_index, enable_disable, 0, 0);
+ return rv;
+}
+
static int
nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size,
f64 drop_fraction)
@@ -134,7 +170,7 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size,
if (delay == 0.0)
return VNET_API_ERROR_INVALID_VALUE_2;
- if (packet_size < 64.0 || packet_size > (f64) WHEEL_ENTRY_DATA_SIZE)
+ if (packet_size < 64.0 || packet_size > 9000.0)
return VNET_API_ERROR_INVALID_VALUE_3;
/* Toss the old wheel(s)... */
@@ -171,7 +207,6 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size,
nsm->packet_size = packet_size;
vec_validate (nsm->wheel_by_thread, num_workers);
- vec_validate (nsm->buffer_indices_by_thread, num_workers);
/* Initialize the output scheduler wheels */
for (i = num_workers ? 1 : 0; i < num_workers + 1; i++)
@@ -192,8 +227,6 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size,
wp->tail = 0;
wp->entries = (void *) (wp + 1);
nsm->wheel_by_thread[i] = wp;
- vec_validate (nsm->buffer_indices_by_thread[i], VLIB_FRAME_SIZE - 1);
- _vec_len (nsm->buffer_indices_by_thread[i]) = 0;
}
vlib_worker_thread_barrier_sync (vm);
@@ -217,22 +250,27 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size,
* enable or disable the cross-connect
*/
static clib_error_t *
-nsim_enable_disable_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
+nsim_cross_connect_enable_disable_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
{
nsim_main_t *nsm = &nsim_main;
+ unformat_input_t _line_input, *line_input = &_line_input;
u32 sw_if_index0 = ~0;
u32 sw_if_index1 = ~0;
int enable_disable = 1;
u32 tmp;
int rv;
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
- if (unformat (input, "disable"))
+ if (unformat (line_input, "disable"))
enable_disable = 0;
- else if (unformat (input, "%U", unformat_vnet_sw_interface,
+ else if (unformat (line_input, "%U", unformat_vnet_sw_interface,
nsm->vnet_main, &tmp))
{
if (sw_if_index0 == ~0)
@@ -244,10 +282,13 @@ nsim_enable_disable_command_fn (vlib_main_t * vm,
break;
}
+ unformat_free (line_input);
+
if (sw_if_index0 == ~0 || sw_if_index1 == ~0)
return clib_error_return (0, "Please specify two interfaces...");
- rv = nsim_enable_disable (nsm, sw_if_index0, sw_if_index1, enable_disable);
+ rv = nsim_cross_connect_enable_disable (nsm, sw_if_index0,
+ sw_if_index1, enable_disable);
switch (rv)
{
@@ -284,34 +325,49 @@ nsim_enable_disable_command_fn (vlib_main_t * vm,
* @cliexpar
* To enable or disable network simulation cross-connect
* @clistart
- * nsim enable-disable TenGigabitEthernet2/0/0 TenGigabitEthernet2/0
- * nsim enable-disable TenGigabitEthernet2/0/0 TenGigabitEthernet2/0 disable
+ * nsim cross-connect enable-disable TenGigabitEthernet2/0/0 TenGigabitEthernet2/0
+ * nsim cross-connect enable-disable TenGigabitEthernet2/0/0 TenGigabitEthernet2/0 disable
* @cliend
* @cliexcmd{nsim enable-disable <intfc> <intfc> [disable]}
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (nsim_enable_disable_command, static) =
{
- .path = "nsim enable-disable",
+ .path = "nsim cross-connect enable-disable",
.short_help =
- "nsim enable-disable <interface-name-1> <interface-name-2> [disable]",
- .function = nsim_enable_disable_command_fn,
+ "nsim cross-connect enable-disable <interface-name-1> "
+ "<interface-name-2> [disable]",
+ .function = nsim_cross_connect_enable_disable_command_fn,
};
/* *INDENT-ON* */
/* API message handler */
-static void vl_api_nsim_enable_disable_t_handler
- (vl_api_nsim_enable_disable_t * mp)
+static void vl_api_nsim_cross_connect_enable_disable_t_handler
+ (vl_api_nsim_cross_connect_enable_disable_t * mp)
{
- vl_api_nsim_enable_disable_reply_t *rmp;
+ vl_api_nsim_cross_connect_enable_disable_reply_t *rmp;
nsim_main_t *nsm = &nsim_main;
int rv;
- rv = nsim_enable_disable (nsm, ntohl (mp->sw_if_index0),
- ntohl (mp->sw_if_index1),
- (int) (mp->enable_disable));
+ rv = nsim_cross_connect_enable_disable (nsm, ntohl (mp->sw_if_index0),
+ ntohl (mp->sw_if_index1),
+ (int) (mp->enable_disable));
- REPLY_MACRO (VL_API_NSIM_ENABLE_DISABLE_REPLY);
+ REPLY_MACRO (VL_API_NSIM_CROSS_CONNECT_ENABLE_DISABLE_REPLY);
+}
+
+/* API message handler */
+static void vl_api_nsim_output_feature_enable_disable_t_handler
+ (vl_api_nsim_output_feature_enable_disable_t * mp)
+{
+ vl_api_nsim_output_feature_enable_disable_reply_t *rmp;
+ nsim_main_t *nsm = &nsim_main;
+ int rv;
+
+ rv = nsim_output_feature_enable_disable (nsm, ntohl (mp->sw_if_index),
+ (int) (mp->enable_disable));
+
+ REPLY_MACRO (VL_API_NSIM_OUTPUT_FEATURE_ENABLE_DISABLE_REPLY);
}
/* API message handler */
@@ -340,6 +396,96 @@ vl_api_nsim_configure_t_handler (vl_api_nsim_configure_t * mp)
}
+/*
+ * enable or disable the output_feature
+ */
+static clib_error_t *
+nsim_output_feature_enable_disable_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ nsim_main_t *nsm = &nsim_main;
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u32 sw_if_index = ~0;
+ int enable_disable = 1;
+ int rv;
+
+ /* Get a line of input. */
+ 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, "disable"))
+ enable_disable = 0;
+ else if (unformat (line_input, "%U", unformat_vnet_sw_interface,
+ nsm->vnet_main, &sw_if_index))
+ ;
+ else
+ {
+ clib_error_t *error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error,
+ line_input);
+ unformat_free (line_input);
+ return error;
+ }
+ }
+
+ unformat_free (line_input);
+
+ if (sw_if_index == ~0)
+ return clib_error_return (0, "Please specify one interface...");
+
+ rv = nsim_output_feature_enable_disable (nsm, sw_if_index, enable_disable);
+
+ switch (rv)
+ {
+ case 0:
+ break;
+
+ case VNET_API_ERROR_CANNOT_ENABLE_DISABLE_FEATURE:
+ return clib_error_return (0, "Not configured, please 'set nsim' first");
+
+ case VNET_API_ERROR_INVALID_SW_IF_INDEX:
+ return clib_error_return
+ (0, "Invalid interface, only works on physical ports");
+ break;
+
+ case VNET_API_ERROR_UNIMPLEMENTED:
+ return clib_error_return (0,
+ "Device driver doesn't support redirection");
+ break;
+
+ default:
+ return clib_error_return
+ (0, "nsim_output_feature_enable_disable returned %d", rv);
+ }
+ return 0;
+}
+
+/*?
+ * Enable or disable network simulation output feature on an interface
+ * The network simulator must have already been configured, see
+ * the "nsim_configure" command.
+ *
+ * @cliexpar
+ * To enable or disable network simulation output feature
+ * @clistart
+ * nsim output-feature enable-disable TenGigabitEthernet2/0/0
+ * nsim output-feature enable-disable TenGigabitEthernet2/0/0 disable
+ * @cliend
+ * @cliexcmd{nsim output-feature enable-disable <intfc> [disable]}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (nsim_output_feature_enable_disable_command, static) =
+{
+ .path = "nsim output-feature enable-disable",
+ .short_help =
+ "nsim output-feature enable-disable <interface-name> [disable]",
+ .function = nsim_output_feature_enable_disable_command_fn,
+};
+/* *INDENT-ON* */
+
/* Set up the API message handling tables */
static clib_error_t *
nsim_plugin_api_hookup (vlib_main_t * vm)
@@ -409,6 +555,15 @@ VNET_FEATURE_INIT (nsim, static) =
/* *INDENT-ON */
/* *INDENT-OFF* */
+VNET_FEATURE_INIT (nsim_feature, static) =
+{
+ .arc_name = "interface-output",
+ .node_name = "nsim-output-feature",
+ .runs_before = VNET_FEATURES ("interface-tx"),
+};
+/* *INDENT-ON */
+
+/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () =
{
.version = VPP_BUILD_VER,
@@ -541,7 +696,8 @@ set_nsim_command_fn (vlib_main_t * vm,
VLIB_CLI_COMMAND (set_nsim_command, static) =
{
.path = "set nsim",
- .short_help = "set nsim delay <time> bandwidth <bps> packet-size <nbytes>",
+ .short_help = "set nsim delay <time> bandwidth <bps> packet-size <nbytes>\n"
+ " [packets-per-drop <nn>][drop-fraction <f64: 0.0 - 1.0>]",
.function = set_nsim_command_fn,
};
/* *INDENT-ON*/