2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * srp_interface.c: srp interfaces
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/vnet.h>
41 #include <vnet/pg/pg.h>
42 #include <vnet/srp/srp.h>
44 static uword srp_set_rewrite (vnet_main_t * vnm,
49 uword max_rewrite_bytes)
51 vnet_hw_interface_t * hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
52 srp_main_t * sm = &srp_main;
53 srp_and_ethernet_header_t * h = rewrite;
55 uword n_bytes = sizeof (h[0]);
57 if (n_bytes > max_rewrite_bytes)
61 #define _(a,b) case VNET_L3_PACKET_TYPE_##a: type = ETHERNET_TYPE_##b; break
64 _ (MPLS_UNICAST, MPLS_UNICAST);
65 _ (MPLS_MULTICAST, MPLS_MULTICAST);
72 memcpy (h->ethernet.src_address, hw->hw_address, sizeof (h->ethernet.src_address));
74 memcpy (h->ethernet.dst_address, dst_address, sizeof (h->ethernet.dst_address));
76 memset (h->ethernet.dst_address, ~0, sizeof (h->ethernet.dst_address)); /* broadcast */
78 h->ethernet.type = clib_host_to_net_u16 (type);
81 h->srp.mode = SRP_MODE_data;
82 h->srp.ttl = sm->default_data_ttl;
83 srp_header_compute_parity (&h->srp);
88 static void srp_register_interface_helper (u32 * hw_if_indices_by_side, u32 redistribute);
90 void serialize_srp_main (serialize_main_t * m, va_list * va)
92 srp_main_t * sm = &srp_main;
95 serialize_integer (m, pool_elts (sm->interface_pool), sizeof (u32));
96 pool_foreach (si, sm->interface_pool, ({
97 serialize_integer (m, si->rings[SRP_RING_OUTER].hw_if_index, sizeof (u32));
98 serialize_integer (m, si->rings[SRP_RING_INNER].hw_if_index, sizeof (u32));
102 void unserialize_srp_main (serialize_main_t * m, va_list * va)
104 u32 i, n_ifs, hw_if_indices[SRP_N_RING];
106 unserialize_integer (m, &n_ifs, sizeof (u32));
107 for (i = 0; i < n_ifs; i++)
109 unserialize_integer (m, &hw_if_indices[SRP_RING_OUTER], sizeof (u32));
110 unserialize_integer (m, &hw_if_indices[SRP_RING_INNER], sizeof (u32));
111 srp_register_interface_helper (hw_if_indices, /* redistribute */ 0);
115 static void serialize_srp_register_interface_msg (serialize_main_t * m, va_list * va)
117 u32 * hw_if_indices = va_arg (*va, u32 *);
118 serialize_integer (m, hw_if_indices[SRP_SIDE_A], sizeof (hw_if_indices[SRP_SIDE_A]));
119 serialize_integer (m, hw_if_indices[SRP_SIDE_B], sizeof (hw_if_indices[SRP_SIDE_B]));
122 static void unserialize_srp_register_interface_msg (serialize_main_t * m, va_list * va)
124 CLIB_UNUSED (mc_main_t * mcm) = va_arg (*va, mc_main_t *);
125 u32 hw_if_indices[SRP_N_SIDE];
126 srp_main_t * sm = &srp_main;
129 unserialize_integer (m, &hw_if_indices[SRP_SIDE_A], sizeof (hw_if_indices[SRP_SIDE_A]));
130 unserialize_integer (m, &hw_if_indices[SRP_SIDE_B], sizeof (hw_if_indices[SRP_SIDE_B]));
132 p = hash_get (sm->srp_register_interface_waiting_process_pool_index_by_hw_if_index,
136 vlib_one_time_waiting_process_t * wp = pool_elt_at_index (sm->srp_register_interface_waiting_process_pool, p[0]);
137 vlib_signal_one_time_waiting_process (mcm->vlib_main, wp);
138 pool_put (sm->srp_register_interface_waiting_process_pool, wp);
139 hash_unset (sm->srp_register_interface_waiting_process_pool_index_by_hw_if_index,
143 srp_register_interface_helper (hw_if_indices, /* redistribute */ 0);
146 MC_SERIALIZE_MSG (srp_register_interface_msg, static) = {
147 .name = "vnet_srp_register_interface",
148 .serialize = serialize_srp_register_interface_msg,
149 .unserialize = unserialize_srp_register_interface_msg,
152 static void srp_register_interface_helper (u32 * hw_if_indices_by_side, u32 redistribute)
154 vnet_main_t * vnm = vnet_get_main();
155 srp_main_t * sm = &srp_main;
156 vlib_main_t * vm = sm->vlib_main;
157 srp_interface_t * si;
158 vnet_hw_interface_t * hws[SRP_N_RING];
161 if (vm->mc_main && redistribute)
163 vlib_one_time_waiting_process_t * wp;
164 mc_serialize (vm->mc_main, &srp_register_interface_msg, hw_if_indices_by_side);
165 pool_get (sm->srp_register_interface_waiting_process_pool, wp);
166 hash_set (sm->srp_register_interface_waiting_process_pool_index_by_hw_if_index,
167 hw_if_indices_by_side[0],
168 wp - sm->srp_register_interface_waiting_process_pool);
169 vlib_current_process_wait_for_one_time_event (vm, wp);
172 /* Check if interface has already been registered. */
173 p = hash_get (sm->interface_index_by_hw_if_index, hw_if_indices_by_side[0]);
176 si = pool_elt_at_index (sm->interface_pool, p[0]);
180 pool_get (sm->interface_pool, si);
181 memset (si, 0, sizeof (si[0]));
183 for (s = 0; s < SRP_N_SIDE; s++)
185 hws[s] = vnet_get_hw_interface (vnm, hw_if_indices_by_side[s]);
186 si->rings[s].ring = s;
187 si->rings[s].hw_if_index = hw_if_indices_by_side[s];
188 si->rings[s].sw_if_index = hws[s]->sw_if_index;
189 hash_set (sm->interface_index_by_hw_if_index, hw_if_indices_by_side[s], si - sm->interface_pool);
192 /* Inherit MAC address from outer ring. */
193 memcpy (si->my_address, hws[SRP_RING_OUTER]->hw_address,
194 vec_len (hws[SRP_RING_OUTER]->hw_address));
196 /* Default time to wait to restore signal. */
197 si->config.wait_to_restore_idle_delay = 60;
198 si->config.ips_tx_interval = 1;
201 void srp_register_interface (u32 * hw_if_indices_by_side)
203 srp_register_interface_helper (hw_if_indices_by_side, /* redistribute */ 1);
206 void srp_interface_set_hw_wrap_function (u32 hw_if_index, srp_hw_wrap_function_t * f)
208 srp_interface_t * si = srp_get_interface_from_vnet_hw_interface (hw_if_index);
209 si->hw_wrap_function = f;
212 void srp_interface_set_hw_enable_function (u32 hw_if_index, srp_hw_enable_function_t * f)
214 srp_interface_t * si = srp_get_interface_from_vnet_hw_interface (hw_if_index);
215 si->hw_enable_function = f;
218 void srp_interface_enable_ips (u32 hw_if_index)
220 srp_main_t * sm = &srp_main;
221 srp_interface_t * si = srp_get_interface_from_vnet_hw_interface (hw_if_index);
223 si->ips_process_enable = 1;
225 vlib_node_set_state (sm->vlib_main, srp_ips_process_node.index, VLIB_NODE_STATE_POLLING);
229 srp_is_valid_class_for_interface (vnet_main_t * vnm, u32 hw_if_index, u32 hw_class_index)
231 srp_interface_t * si = srp_get_interface_from_vnet_hw_interface (hw_if_index);
236 /* Both sides must be admin down. */
237 if (vnet_sw_interface_is_admin_up (vnm, si->rings[SRP_RING_OUTER].sw_if_index))
239 if (vnet_sw_interface_is_admin_up (vnm, si->rings[SRP_RING_INNER].sw_if_index))
246 srp_interface_hw_class_change (vnet_main_t * vnm, u32 hw_if_index,
247 u32 old_hw_class_index, u32 new_hw_class_index)
249 srp_main_t * sm = &srp_main;
250 srp_interface_t * si = srp_get_interface_from_vnet_hw_interface (hw_if_index);
251 vnet_hw_interface_t * hi;
252 vnet_device_class_t * dc;
256 clib_warning ("srp interface no set si = 0");
260 to_srp = new_hw_class_index == srp_hw_interface_class.index;
262 /* Changing class on either outer or inner rings implies changing the class
264 for (r = 0; r < SRP_N_RING; r++)
266 srp_interface_ring_t * ir = &si->rings[r];
268 hi = vnet_get_hw_interface (vnm, ir->hw_if_index);
269 dc = vnet_get_device_class (vnm, hi->dev_class_index);
271 /* hw_if_index itself will be handled by caller. */
272 if (ir->hw_if_index != hw_if_index)
274 vnet_hw_interface_init_for_class (vnm, ir->hw_if_index,
276 to_srp ? si - sm->interface_pool : ~0);
278 if (dc->hw_class_change)
279 dc->hw_class_change (vnm, ir->hw_if_index, new_hw_class_index);
282 hi->hw_instance = to_srp ? si - sm->interface_pool : ~0;
285 if (si->hw_enable_function)
286 si->hw_enable_function (si, /* enable */ to_srp);
289 VNET_HW_INTERFACE_CLASS (srp_hw_interface_class) = {
291 .format_address = format_ethernet_address,
292 .format_header = format_srp_header_with_length,
293 .format_device = format_srp_device,
294 .unformat_hw_address = unformat_ethernet_address,
295 .unformat_header = unformat_srp_header,
296 .set_rewrite = srp_set_rewrite,
297 .is_valid_class_for_interface = srp_is_valid_class_for_interface,
298 .hw_class_change = srp_interface_hw_class_change,
301 static void serialize_srp_interface_config_msg (serialize_main_t * m, va_list * va)
303 srp_interface_t * si = va_arg (*va, srp_interface_t *);
304 srp_main_t * sm = &srp_main;
306 ASSERT (! pool_is_free (sm->interface_pool, si));
307 serialize_integer (m, si - sm->interface_pool, sizeof (u32));
308 serialize (m, serialize_f64, si->config.wait_to_restore_idle_delay);
309 serialize (m, serialize_f64, si->config.ips_tx_interval);
312 static void unserialize_srp_interface_config_msg (serialize_main_t * m, va_list * va)
314 CLIB_UNUSED (mc_main_t * mcm) = va_arg (*va, mc_main_t *);
315 srp_main_t * sm = &srp_main;
316 srp_interface_t * si;
319 unserialize_integer (m, &si_index, sizeof (u32));
320 si = pool_elt_at_index (sm->interface_pool, si_index);
321 unserialize (m, unserialize_f64, &si->config.wait_to_restore_idle_delay);
322 unserialize (m, unserialize_f64, &si->config.ips_tx_interval);
325 MC_SERIALIZE_MSG (srp_interface_config_msg, static) = {
326 .name = "vnet_srp_interface_config",
327 .serialize = serialize_srp_interface_config_msg,
328 .unserialize = unserialize_srp_interface_config_msg,
331 void srp_interface_get_interface_config (u32 hw_if_index, srp_interface_config_t * c)
333 srp_interface_t * si = srp_get_interface_from_vnet_hw_interface (hw_if_index);
338 void srp_interface_set_interface_config (u32 hw_if_index, srp_interface_config_t * c)
340 srp_main_t * sm = &srp_main;
341 vlib_main_t * vm = sm->vlib_main;
342 srp_interface_t * si = srp_get_interface_from_vnet_hw_interface (hw_if_index);
344 if (memcmp (&si->config, &c[0], sizeof (c[0])))
348 mc_serialize (vm->mc_main, &srp_interface_config_msg, si);
354 #define VNET_SIMULATED_SRP_TX_NEXT_SRP_INPUT VNET_INTERFACE_TX_N_NEXT
356 /* Echo packets back to srp input. */
358 simulated_srp_interface_tx (vlib_main_t * vm,
359 vlib_node_runtime_t * node,
360 vlib_frame_t * frame)
362 u32 n_left_from, n_left_to_next, n_copy, * from, * to_next;
363 u32 next_index = VNET_SIMULATED_SRP_TX_NEXT_SRP_INPUT;
367 n_left_from = frame->n_vectors;
368 from = vlib_frame_args (frame);
370 while (n_left_from > 0)
372 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
374 n_copy = clib_min (n_left_from, n_left_to_next);
376 memcpy (to_next, from, n_copy * sizeof (from[0]));
377 n_left_to_next -= n_copy;
378 n_left_from -= n_copy;
379 for (i = 0; i < n_copy; i++)
381 b = vlib_get_buffer (vm, from[i]);
382 /* TX interface will be fake eth; copy to RX for benefit of srp-input. */
383 b->sw_if_index[VLIB_RX] = b->sw_if_index[VLIB_TX];
386 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
392 static u8 * format_simulated_srp_name (u8 * s, va_list * args)
394 u32 dev_instance = va_arg (*args, u32);
395 return format (s, "fake-srp%d", dev_instance);
398 VNET_DEVICE_CLASS (srp_simulated_device_class,static) = {
399 .name = "Simulated srp",
400 .format_device_name = format_simulated_srp_name,
401 .tx_function = simulated_srp_interface_tx,
404 static clib_error_t *
405 create_simulated_srp_interfaces (vlib_main_t * vm,
406 unformat_input_t * input,
407 vlib_cli_command_t * cmd)
409 vnet_main_t * vnm = vnet_get_main();
412 vnet_hw_interface_t * hi;
415 if (! unformat_user (input, unformat_ethernet_address, &address))
417 memset (address, 0, sizeof (address));
420 address[5] = instance;
423 hw_if_index = vnet_register_interface (vnm,
424 srp_simulated_device_class.index,
426 srp_hw_interface_class.index, 0);
428 hi = vnet_get_hw_interface (vnm, hw_if_index);
430 srp_setup_node (vm, hi->output_node_index);
432 hi->min_packet_bytes = 40 + 16;
434 /* Standard default ethernet MTU. */
435 hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 1500;
437 vec_free (hi->hw_address);
438 vec_add (hi->hw_address, address, sizeof (address));
443 slot = vlib_node_add_named_next_with_slot
444 (vm, hi->tx_node_index,
446 VNET_SIMULATED_SRP_TX_NEXT_SRP_INPUT);
447 ASSERT (slot == VNET_SIMULATED_SRP_TX_NEXT_SRP_INPUT);
450 return /* no error */ 0;
453 static VLIB_CLI_COMMAND (create_simulated_srp_interface_command) = {
454 .path = "srp create-interfaces",
455 .short_help = "Create simulated srp interface",
456 .function = create_simulated_srp_interfaces,