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>
44 /* Mark stream active or inactive. */
46 pg_stream_enable_disable (pg_main_t * pg, pg_stream_t * s, int want_enabled)
48 vnet_main_t *vnm = vnet_get_main ();
49 pg_interface_t *pi = pool_elt_at_index (pg->interfaces, s->pg_if_index);
51 want_enabled = want_enabled != 0;
53 if (pg_stream_is_enabled (s) == want_enabled)
54 /* No change necessary. */
58 s->n_packets_generated = 0;
60 /* Toggle enabled flag. */
61 s->flags ^= PG_STREAM_FLAGS_IS_ENABLED;
63 ASSERT (!pool_is_free (pg->streams, s));
66 = clib_bitmap_set (pg->enabled_streams, s - pg->streams, want_enabled);
70 vnet_hw_interface_set_flags (vnm, pi->hw_if_index,
71 VNET_HW_INTERFACE_FLAG_LINK_UP);
73 vnet_sw_interface_set_flags (vnm, pi->sw_if_index,
74 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
77 vlib_node_set_state (pg->vlib_main,
79 (clib_bitmap_is_zero (pg->enabled_streams)
80 ? VLIB_NODE_STATE_DISABLED
81 : VLIB_NODE_STATE_POLLING));
83 s->packet_accumulator = 0;
84 s->time_last_generate = 0;
88 format_pg_interface_name (u8 * s, va_list * args)
90 pg_main_t *pg = &pg_main;
91 u32 if_index = va_arg (*args, u32);
94 pi = pool_elt_at_index (pg->interfaces, if_index);
95 s = format (s, "pg%d", pi->id);
100 static clib_error_t *
101 pg_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
105 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
106 hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
108 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
114 VNET_DEVICE_CLASS (pg_dev_class) = {
116 .tx_function = pg_output,
117 .format_device_name = format_pg_interface_name,
118 .admin_up_down_function = pg_interface_admin_up_down,
123 pg_set_rewrite (vnet_main_t * vnm,
126 void *dst_address, void *rewrite, uword max_rewrite_bytes)
130 if (max_rewrite_bytes < sizeof (h[0]))
133 h[0] = clib_host_to_net_u16 (l3_type);
134 return sizeof (h[0]);
138 VNET_HW_INTERFACE_CLASS (pg_interface_class,static) = {
139 .name = "Packet generator",
140 .set_rewrite = pg_set_rewrite,
145 pg_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
147 /* nothing for now */
152 pg_interface_add_or_get (pg_main_t * pg, uword if_id)
154 vnet_main_t *vnm = vnet_get_main ();
155 vlib_main_t *vm = vlib_get_main ();
157 vnet_hw_interface_t *hi;
161 p = hash_get (pg->if_index_by_if_id, if_id);
170 f64 now = vlib_time_now (vm);
173 pool_get (pg->interfaces, pi);
174 i = pi - pg->interfaces;
176 rnd = (u32) (now * 1e6);
177 rnd = random_u32 (&rnd);
178 clib_memcpy (hw_addr + 2, &rnd, sizeof (rnd));
183 ethernet_register_interface (vnm, pg_dev_class.index, i, hw_addr,
184 &pi->hw_if_index, pg_eth_flag_change);
185 hi = vnet_get_hw_interface (vnm, pi->hw_if_index);
186 pi->sw_if_index = hi->sw_if_index;
188 hash_set (pg->if_index_by_if_id, if_id, i);
195 do_edit (pg_stream_t * stream,
196 pg_edit_group_t * g, pg_edit_t * e, uword want_commit)
198 u32 i, i0, i1, mask, n_bits_left;
201 i0 = e->lsb_bit_offset / BITS (u8);
203 /* Make space for edit in value and mask. */
204 vec_validate (g->fixed_packet_data, i0);
205 vec_validate (g->fixed_packet_data_mask, i0);
207 if (e->type != PG_EDIT_FIXED)
212 case PG_EDIT_INCREMENT:
213 e->last_increment_value = pg_edit_get_value (e, PG_EDIT_LO);
222 ASSERT (e->type != PG_EDIT_INVALID_TYPE);
223 vec_add1 (g->non_fixed_edits, e[0]);
228 s = g->fixed_packet_data;
229 m = g->fixed_packet_data_mask;
231 n_bits_left = e->n_bits;
232 i0 = e->lsb_bit_offset / BITS (u8);
233 i1 = e->lsb_bit_offset % BITS (u8);
235 v = e->values[PG_EDIT_LO];
236 i = pg_edit_n_alloc_bytes (e) - 1;
238 /* Odd low order bits?. */
239 if (i1 != 0 && n_bits_left > 0)
241 u32 n = clib_min (n_bits_left, BITS (u8) - i1);
243 mask = pow2_mask (n) << i1;
245 ASSERT (i0 < vec_len (s));
246 ASSERT (i < vec_len (v));
247 ASSERT ((v[i] & ~mask) == 0);
249 s[i0] |= v[i] & mask;
258 while (n_bits_left >= 8)
260 ASSERT (i0 < vec_len (s));
261 ASSERT (i < vec_len (v));
271 /* Odd high order bits. */
274 mask = pow2_mask (n_bits_left);
276 ASSERT (i0 < vec_len (s));
277 ASSERT (i < vec_len (v));
278 ASSERT ((v[i] & ~mask) == 0);
280 s[i0] |= v[i] & mask;
289 pg_edit_group_get_fixed_packet_data (pg_stream_t * s,
292 void *packet_data_mask)
294 pg_edit_group_t *g = pg_stream_get_group (s, group_index);
297 vec_foreach (e, g->edits) do_edit (s, g, e, /* want_commit */ 0);
299 clib_memcpy (packet_data, g->fixed_packet_data,
300 vec_len (g->fixed_packet_data));
301 clib_memcpy (packet_data_mask, g->fixed_packet_data_mask,
302 vec_len (g->fixed_packet_data_mask));
306 perform_fixed_edits (pg_stream_t * s)
312 for (i = vec_len (s->edit_groups) - 1; i >= 0; i--)
314 g = vec_elt_at_index (s->edit_groups, i);
315 vec_foreach (e, g->edits) do_edit (s, g, e, /* want_commit */ 1);
317 /* All edits have either been performed or added to
318 g->non_fixed_edits. So, we can delete the vector. */
322 vec_free (s->fixed_packet_data_mask);
323 vec_free (s->fixed_packet_data);
324 vec_foreach (g, s->edit_groups)
327 g->start_byte_offset = vec_len (s->fixed_packet_data);
329 /* Relocate and copy non-fixed edits from group to stream. */
330 vec_foreach (e, g->non_fixed_edits)
331 e->lsb_bit_offset += g->start_byte_offset * BITS (u8);
333 for (i = 0; i < vec_len (g->non_fixed_edits); i++)
334 ASSERT (g->non_fixed_edits[i].type != PG_EDIT_INVALID_TYPE);
336 vec_add (s->non_fixed_edits,
337 g->non_fixed_edits, vec_len (g->non_fixed_edits));
338 vec_free (g->non_fixed_edits);
340 vec_add (s->fixed_packet_data,
341 g->fixed_packet_data, vec_len (g->fixed_packet_data));
342 vec_add (s->fixed_packet_data_mask,
343 g->fixed_packet_data_mask, vec_len (g->fixed_packet_data_mask));
348 pg_stream_add (pg_main_t * pg, pg_stream_t * s_init)
350 vlib_main_t *vm = pg->vlib_main;
354 if (!pg->stream_index_by_name)
355 pg->stream_index_by_name
356 = hash_create_vec (0, sizeof (s->name[0]), sizeof (uword));
358 /* Delete any old stream with the same name. */
360 && (p = hash_get_mem (pg->stream_index_by_name, s_init->name)))
362 pg_stream_del (pg, p[0]);
365 pool_get (pg->streams, s);
368 /* Give it a name. */
370 s->name = format (0, "stream%d", s - pg->streams);
372 s->name = vec_dup (s->name);
374 hash_set_mem (pg->stream_index_by_name, s->name, s - pg->streams);
376 /* Get fixed part of buffer data. */
378 perform_fixed_edits (s);
380 /* Determine packet size. */
381 switch (s->packet_size_edit_type)
383 case PG_EDIT_INCREMENT:
385 if (s->min_packet_bytes == s->max_packet_bytes)
386 s->packet_size_edit_type = PG_EDIT_FIXED;
390 /* Get packet size from fixed edits. */
391 s->packet_size_edit_type = PG_EDIT_FIXED;
392 if (!s->replay_packet_templates)
393 s->min_packet_bytes = s->max_packet_bytes =
394 vec_len (s->fixed_packet_data);
398 s->last_increment_packet_size = s->min_packet_bytes;
401 pg_buffer_index_t *bi;
404 if (!s->buffer_bytes)
405 s->buffer_bytes = s->max_packet_bytes;
407 s->buffer_bytes = vlib_buffer_round_size (s->buffer_bytes);
409 n = s->max_packet_bytes / s->buffer_bytes;
410 n += (s->max_packet_bytes % s->buffer_bytes) != 0;
412 vec_resize (s->buffer_indices, n);
414 vec_foreach (bi, s->buffer_indices)
415 bi->free_list_index = vlib_buffer_create_free_list (vm, s->buffer_bytes,
416 "pg stream %d buffer #%d",
423 /* Find an interface to use. */
424 s->pg_if_index = pg_interface_add_or_get (pg, s->if_id);
427 pg_interface_t *pi = pool_elt_at_index (pg->interfaces, s->pg_if_index);
428 vlib_rx_or_tx_t rx_or_tx;
430 vlib_foreach_rx_tx (rx_or_tx)
432 if (s->sw_if_index[rx_or_tx] == ~0)
433 s->sw_if_index[rx_or_tx] = pi->sw_if_index;
437 /* Connect the graph. */
438 s->next_index = vlib_node_add_next (vm, pg_input_node.index, s->node_index);
442 pg_stream_del (pg_main_t * pg, uword index)
444 vlib_main_t *vm = pg->vlib_main;
446 pg_buffer_index_t *bi;
448 s = pool_elt_at_index (pg->streams, index);
450 pg_stream_enable_disable (pg, s, /* want_enabled */ 0);
451 hash_unset_mem (pg->stream_index_by_name, s->name);
453 vec_foreach (bi, s->buffer_indices)
455 vlib_buffer_delete_free_list (vm, bi->free_list_index);
456 clib_fifo_free (bi->buffer_fifo);
460 pool_put (pg->streams, s);
465 * fd.io coding-style-patch-verification: ON
468 * eval: (c-set-style "gnu")