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 * pg_stream.c: packet generator streams
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/ethernet/ethernet.h>
43 #include <vnet/ip/ip.h>
44 #include <vnet/mpls/mpls.h>
45 #include <vnet/devices/devices.h>
47 /* Mark stream active or inactive. */
49 pg_stream_enable_disable (pg_main_t * pg, pg_stream_t * s, int want_enabled)
52 vnet_main_t *vnm = vnet_get_main ();
53 pg_interface_t *pi = pool_elt_at_index (pg->interfaces, s->pg_if_index);
55 want_enabled = want_enabled != 0;
57 if (pg_stream_is_enabled (s) == want_enabled)
58 /* No change necessary. */
62 s->n_packets_generated = 0;
64 /* Toggle enabled flag. */
65 s->flags ^= PG_STREAM_FLAGS_IS_ENABLED;
67 ASSERT (!pool_is_free (pg->streams, s));
69 vec_validate (pg->enabled_streams, s->worker_index);
70 pg->enabled_streams[s->worker_index] =
71 clib_bitmap_set (pg->enabled_streams[s->worker_index], s - pg->streams,
76 vnet_hw_interface_set_flags (vnm, pi->hw_if_index,
77 VNET_HW_INTERFACE_FLAG_LINK_UP);
79 vnet_sw_interface_set_flags (vnm, pi->sw_if_index,
80 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
83 if (vlib_num_workers ())
84 vm = vlib_get_worker_vlib_main (s->worker_index);
86 vm = vlib_get_main ();
88 vlib_node_set_state (vm, pg_input_node.index,
90 (pg->enabled_streams[s->worker_index]) ?
91 VLIB_NODE_STATE_DISABLED : VLIB_NODE_STATE_POLLING));
93 s->packet_accumulator = 0;
94 s->time_last_generate = 0;
98 format_pg_output_trace (u8 * s, va_list * va)
100 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
101 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
102 pg_output_trace_t *t = va_arg (*va, pg_output_trace_t *);
103 u32 indent = format_get_indent (s);
105 s = format (s, "%Ubuffer 0x%x: %U",
106 format_white_space, indent,
107 t->buffer_index, format_vlib_buffer, &t->buffer);
109 s = format (s, "\n%U%U", format_white_space, indent,
110 format_ethernet_header_with_length, t->buffer.pre_data,
111 sizeof (t->buffer.pre_data));
117 format_pg_interface_name (u8 * s, va_list * args)
119 pg_main_t *pg = &pg_main;
120 u32 if_index = va_arg (*args, u32);
123 pi = pool_elt_at_index (pg->interfaces, if_index);
124 s = format (s, "pg%d", pi->id);
129 static clib_error_t *
130 pg_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
134 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
135 hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
137 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
143 VNET_DEVICE_CLASS (pg_dev_class) = {
145 .tx_function = pg_output,
146 .format_device_name = format_pg_interface_name,
147 .format_tx_trace = format_pg_output_trace,
148 .admin_up_down_function = pg_interface_admin_up_down,
153 pg_build_rewrite (vnet_main_t * vnm,
155 vnet_link_t link_type, const void *dst_address)
160 vec_validate (rewrite, sizeof (*h) - 1);
162 h[0] = clib_host_to_net_u16 (vnet_link_to_l3_proto (link_type));
168 VNET_HW_INTERFACE_CLASS (pg_interface_class,static) = {
169 .name = "Packet generator",
170 .build_rewrite = pg_build_rewrite,
175 pg_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
177 /* nothing for now */
182 pg_interface_add_or_get (pg_main_t * pg, uword if_id)
184 vnet_main_t *vnm = vnet_get_main ();
185 vlib_main_t *vm = vlib_get_main ();
187 vnet_hw_interface_t *hi;
191 p = hash_get (pg->if_index_by_if_id, if_id);
200 f64 now = vlib_time_now (vm);
203 pool_get (pg->interfaces, pi);
204 i = pi - pg->interfaces;
206 rnd = (u32) (now * 1e6);
207 rnd = random_u32 (&rnd);
208 clib_memcpy (hw_addr + 2, &rnd, sizeof (rnd));
213 ethernet_register_interface (vnm, pg_dev_class.index, i, hw_addr,
214 &pi->hw_if_index, pg_eth_flag_change);
215 hi = vnet_get_hw_interface (vnm, pi->hw_if_index);
216 pi->sw_if_index = hi->sw_if_index;
218 hash_set (pg->if_index_by_if_id, if_id, i);
220 if (vlib_num_workers ())
222 pi->lockp = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES,
223 CLIB_CACHE_LINE_BYTES);
232 do_edit (pg_stream_t * stream,
233 pg_edit_group_t * g, pg_edit_t * e, uword want_commit)
235 u32 i, i0, i1, mask, n_bits_left;
238 i0 = e->lsb_bit_offset / BITS (u8);
240 /* Make space for edit in value and mask. */
241 vec_validate (g->fixed_packet_data, i0);
242 vec_validate (g->fixed_packet_data_mask, i0);
244 if (e->type != PG_EDIT_FIXED)
249 case PG_EDIT_INCREMENT:
250 e->last_increment_value = pg_edit_get_value (e, PG_EDIT_LO);
259 ASSERT (e->type != PG_EDIT_INVALID_TYPE);
260 vec_add1 (g->non_fixed_edits, e[0]);
265 s = g->fixed_packet_data;
266 m = g->fixed_packet_data_mask;
268 n_bits_left = e->n_bits;
269 i0 = e->lsb_bit_offset / BITS (u8);
270 i1 = e->lsb_bit_offset % BITS (u8);
272 v = e->values[PG_EDIT_LO];
273 i = pg_edit_n_alloc_bytes (e) - 1;
275 /* Odd low order bits?. */
276 if (i1 != 0 && n_bits_left > 0)
278 u32 n = clib_min (n_bits_left, BITS (u8) - i1);
280 mask = pow2_mask (n) << i1;
282 ASSERT (i0 < vec_len (s));
283 ASSERT (i < vec_len (v));
284 ASSERT ((v[i] & ~mask) == 0);
286 s[i0] |= v[i] & mask;
295 while (n_bits_left >= 8)
297 ASSERT (i0 < vec_len (s));
298 ASSERT (i < vec_len (v));
308 /* Odd high order bits. */
311 mask = pow2_mask (n_bits_left);
313 ASSERT (i0 < vec_len (s));
314 ASSERT (i < vec_len (v));
315 ASSERT ((v[i] & ~mask) == 0);
317 s[i0] |= v[i] & mask;
326 pg_edit_group_get_fixed_packet_data (pg_stream_t * s,
329 void *packet_data_mask)
331 pg_edit_group_t *g = pg_stream_get_group (s, group_index);
334 vec_foreach (e, g->edits) do_edit (s, g, e, /* want_commit */ 0);
336 clib_memcpy (packet_data, g->fixed_packet_data,
337 vec_len (g->fixed_packet_data));
338 clib_memcpy (packet_data_mask, g->fixed_packet_data_mask,
339 vec_len (g->fixed_packet_data_mask));
343 perform_fixed_edits (pg_stream_t * s)
349 for (i = vec_len (s->edit_groups) - 1; i >= 0; i--)
351 g = vec_elt_at_index (s->edit_groups, i);
352 vec_foreach (e, g->edits) do_edit (s, g, e, /* want_commit */ 1);
354 /* All edits have either been performed or added to
355 g->non_fixed_edits. So, we can delete the vector. */
359 vec_free (s->fixed_packet_data_mask);
360 vec_free (s->fixed_packet_data);
361 vec_foreach (g, s->edit_groups)
364 g->start_byte_offset = vec_len (s->fixed_packet_data);
366 /* Relocate and copy non-fixed edits from group to stream. */
367 vec_foreach (e, g->non_fixed_edits)
368 e->lsb_bit_offset += g->start_byte_offset * BITS (u8);
370 for (i = 0; i < vec_len (g->non_fixed_edits); i++)
371 ASSERT (g->non_fixed_edits[i].type != PG_EDIT_INVALID_TYPE);
373 vec_add (s->non_fixed_edits,
374 g->non_fixed_edits, vec_len (g->non_fixed_edits));
375 vec_free (g->non_fixed_edits);
377 vec_add (s->fixed_packet_data,
378 g->fixed_packet_data, vec_len (g->fixed_packet_data));
379 vec_add (s->fixed_packet_data_mask,
380 g->fixed_packet_data_mask, vec_len (g->fixed_packet_data_mask));
385 pg_stream_add (pg_main_t * pg, pg_stream_t * s_init)
387 vlib_main_t *vm = vlib_get_main ();
391 if (!pg->stream_index_by_name)
392 pg->stream_index_by_name
393 = hash_create_vec (0, sizeof (s->name[0]), sizeof (uword));
395 /* Delete any old stream with the same name. */
397 && (p = hash_get_mem (pg->stream_index_by_name, s_init->name)))
399 pg_stream_del (pg, p[0]);
402 pool_get (pg->streams, s);
405 /* Give it a name. */
407 s->name = format (0, "stream%d", s - pg->streams);
409 s->name = vec_dup (s->name);
411 hash_set_mem (pg->stream_index_by_name, s->name, s - pg->streams);
413 /* Get fixed part of buffer data. */
415 perform_fixed_edits (s);
417 /* Determine packet size. */
418 switch (s->packet_size_edit_type)
420 case PG_EDIT_INCREMENT:
422 if (s->min_packet_bytes == s->max_packet_bytes)
423 s->packet_size_edit_type = PG_EDIT_FIXED;
427 /* Get packet size from fixed edits. */
428 s->packet_size_edit_type = PG_EDIT_FIXED;
429 if (!s->replay_packet_templates)
430 s->min_packet_bytes = s->max_packet_bytes =
431 vec_len (s->fixed_packet_data);
435 s->last_increment_packet_size = s->min_packet_bytes;
438 pg_buffer_index_t *bi;
441 if (vm->buffer_main->callbacks_registered)
442 s->buffer_bytes = VLIB_BUFFER_DATA_SIZE;
444 if (!s->buffer_bytes)
445 s->buffer_bytes = s->max_packet_bytes;
447 s->buffer_bytes = vlib_buffer_round_size (s->buffer_bytes);
449 n = s->max_packet_bytes / s->buffer_bytes;
450 n += (s->max_packet_bytes % s->buffer_bytes) != 0;
452 vec_resize (s->buffer_indices, n);
454 vec_foreach (bi, s->buffer_indices)
456 bi->free_list_index =
457 vlib_buffer_create_free_list (vm, s->buffer_bytes,
458 "pg stream %d buffer #%d",
460 1 + (bi - s->buffer_indices));
464 /* Find an interface to use. */
465 s->pg_if_index = pg_interface_add_or_get (pg, s->if_id);
468 pg_interface_t *pi = pool_elt_at_index (pg->interfaces, s->pg_if_index);
469 vlib_rx_or_tx_t rx_or_tx;
471 vlib_foreach_rx_tx (rx_or_tx)
473 if (s->sw_if_index[rx_or_tx] == ~0)
474 s->sw_if_index[rx_or_tx] = pi->sw_if_index;
478 /* Connect the graph. */
479 s->next_index = vlib_node_add_next (vm, device_input_node.index,
484 pg_stream_del (pg_main_t * pg, uword index)
486 vlib_main_t *vm = vlib_get_main ();
488 pg_buffer_index_t *bi;
490 s = pool_elt_at_index (pg->streams, index);
492 pg_stream_enable_disable (pg, s, /* want_enabled */ 0);
493 hash_unset_mem (pg->stream_index_by_name, s->name);
495 vec_foreach (bi, s->buffer_indices)
497 vlib_buffer_delete_free_list (vm, bi->free_list_index);
498 clib_fifo_free (bi->buffer_fifo);
502 pool_put (pg->streams, s);
507 * fd.io coding-style-patch-verification: ON
510 * eval: (c-set-style "gnu")