blob: 119cdd812ad8d907f8750faf8df17253de6fbab7 [file] [log] [blame]
Dave Barach68b0fb02017-02-28 15:15:56 -05001/*
2 * Copyright (c) 2017 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:
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
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.
14 */
15
Florin Coras6792ec02017-03-13 03:49:51 -070016#include <math.h>
Dave Barach68b0fb02017-02-28 15:15:56 -050017#include <vlib/vlib.h>
18#include <vnet/vnet.h>
Dave Barach68b0fb02017-02-28 15:15:56 -050019#include <vppinfra/elog.h>
Florin Coras561af9b2017-12-09 10:19:43 -080020#include <vnet/session/transport.h>
Florin Coras8e43d042018-05-04 15:46:57 -070021#include <vnet/session/session.h>
Florin Coras6792ec02017-03-13 03:49:51 -070022#include <vnet/session/application.h>
Florin Coras52207f12018-07-12 14:48:06 -070023#include <vnet/session/application_interface.h>
Florin Corase69f4952017-03-07 10:06:24 -080024#include <vnet/session/session_debug.h>
Florin Corase86a8ed2018-01-05 03:20:25 -080025#include <svm/queue.h>
Dave Barach68b0fb02017-02-28 15:15:56 -050026
Florin Coras52207f12018-07-12 14:48:06 -070027static void
28session_mq_accepted_reply_handler (void *data)
29{
30 session_accepted_reply_msg_t *mp = (session_accepted_reply_msg_t *) data;
31 vnet_disconnect_args_t _a = { 0 }, *a = &_a;
32 local_session_t *ls;
33 stream_session_t *s;
34
35 /* Server isn't interested, kill the session */
36 if (mp->retval)
37 {
38 a->app_index = mp->context;
39 a->handle = mp->handle;
40 vnet_disconnect_session (a);
41 return;
42 }
43
44 if (session_handle_is_local (mp->handle))
45 {
Florin Corasab2f6db2018-08-31 14:31:41 -070046 app_worker_t *app_wrk;
47 application_t *app;
Florin Coras52207f12018-07-12 14:48:06 -070048 ls = application_get_local_session_from_handle (mp->handle);
Florin Corasab2f6db2018-08-31 14:31:41 -070049 if (!ls)
Florin Coras52207f12018-07-12 14:48:06 -070050 {
Florin Corasab2f6db2018-08-31 14:31:41 -070051 clib_warning ("unknown local handle 0x%lx", mp->handle);
52 return;
53 }
54 app_wrk = app_worker_get (ls->app_wrk_index);
55 app = application_get (app_wrk->app_index);
56 if (app->app_index != mp->context)
57 {
58 clib_warning ("server %u doesn't own local handle 0x%lx",
Florin Coras52207f12018-07-12 14:48:06 -070059 mp->context, mp->handle);
60 return;
61 }
62 if (application_local_session_connect_notify (ls))
63 return;
64 ls->session_state = SESSION_STATE_READY;
65 }
66 else
67 {
68 s = session_get_from_handle_if_valid (mp->handle);
69 if (!s)
70 {
71 clib_warning ("session doesn't exist");
72 return;
73 }
Florin Coras15531972018-08-12 23:50:53 -070074 if (s->app_wrk_index != mp->context)
Florin Coras52207f12018-07-12 14:48:06 -070075 {
76 clib_warning ("app doesn't own session");
77 return;
78 }
79 s->session_state = SESSION_STATE_READY;
Florin Coras84099552018-07-22 12:59:30 -070080 if (!svm_fifo_is_empty (s->server_rx_fifo))
81 {
Florin Coras15531972018-08-12 23:50:53 -070082 app_worker_t *app;
83 app = app_worker_get (s->app_wrk_index);
Florin Corasab2f6db2018-08-31 14:31:41 -070084 app_worker_send_event (app, s, FIFO_EVENT_APP_RX);
Florin Coras84099552018-07-22 12:59:30 -070085 }
Florin Coras52207f12018-07-12 14:48:06 -070086 }
87}
88
89static void
90session_mq_reset_reply_handler (void *data)
91{
92 session_reset_reply_msg_t *mp;
Florin Coras15531972018-08-12 23:50:53 -070093 app_worker_t *app_wrk;
Florin Coras52207f12018-07-12 14:48:06 -070094 stream_session_t *s;
Florin Coras15531972018-08-12 23:50:53 -070095 application_t *app;
Florin Coras52207f12018-07-12 14:48:06 -070096 u32 index, thread_index;
97
98 mp = (session_reset_reply_msg_t *) data;
99 app = application_lookup (mp->client_index);
100 if (!app)
101 return;
102
103 session_parse_handle (mp->handle, &index, &thread_index);
104 s = session_get_if_valid (index, thread_index);
Florin Coras15531972018-08-12 23:50:53 -0700105 if (!s)
Florin Coras52207f12018-07-12 14:48:06 -0700106 {
107 clib_warning ("Invalid session!");
108 return;
109 }
Florin Coras15531972018-08-12 23:50:53 -0700110 app_wrk = app_worker_get (s->app_wrk_index);
111 if (!app_wrk || app_wrk->app_index != app->app_index)
112 {
113 clib_warning ("App % does not own handle 0x%lx!", app->app_index,
114 mp->handle);
115 return;
116 }
Florin Coras52207f12018-07-12 14:48:06 -0700117
118 /* Client objected to resetting the session, log and continue */
119 if (mp->retval)
120 {
121 clib_warning ("client retval %d", mp->retval);
122 return;
123 }
124
125 /* This comes as a response to a reset, transport only waiting for
126 * confirmation to remove connection state, no need to disconnect */
127 stream_session_cleanup (s);
128}
129
130static void
131session_mq_disconnected_handler (void *data)
132{
133 session_disconnected_reply_msg_t *rmp;
134 vnet_disconnect_args_t _a, *a = &_a;
135 svm_msg_q_msg_t _msg, *msg = &_msg;
136 session_disconnected_msg_t *mp;
Florin Coras15531972018-08-12 23:50:53 -0700137 app_worker_t *app_wrk;
Florin Coras52207f12018-07-12 14:48:06 -0700138 session_event_t *evt;
Florin Coras3d0fadc2018-07-17 05:35:47 -0700139 stream_session_t *s;
Florin Coras52207f12018-07-12 14:48:06 -0700140 application_t *app;
141 int rv = 0;
142
143 mp = (session_disconnected_msg_t *) data;
Florin Corasc3638fe2018-08-24 13:58:49 -0700144 if (!(s = session_get_from_handle_if_valid (mp->handle)))
145 {
146 clib_warning ("could not disconnect handle %llu", mp->handle);
147 return;
148 }
Florin Coras15531972018-08-12 23:50:53 -0700149 app_wrk = app_worker_get (s->app_wrk_index);
150 app = application_lookup (mp->client_index);
Florin Corasc3638fe2018-08-24 13:58:49 -0700151 if (!(app_wrk && app && app->app_index == app_wrk->app_index))
Florin Coras52207f12018-07-12 14:48:06 -0700152 {
Florin Corasc3638fe2018-08-24 13:58:49 -0700153 clib_warning ("could not disconnect session: %llu app: %u",
Florin Coras15531972018-08-12 23:50:53 -0700154 mp->handle, mp->client_index);
Florin Coras3d0fadc2018-07-17 05:35:47 -0700155 return;
Florin Coras52207f12018-07-12 14:48:06 -0700156 }
Florin Coras3d0fadc2018-07-17 05:35:47 -0700157
158 a->handle = mp->handle;
Florin Coras15531972018-08-12 23:50:53 -0700159 a->app_index = app_wrk->wrk_index;
Florin Coras3d0fadc2018-07-17 05:35:47 -0700160 rv = vnet_disconnect_session (a);
Florin Coras52207f12018-07-12 14:48:06 -0700161
Florin Coras15531972018-08-12 23:50:53 -0700162 svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
Florin Coras52207f12018-07-12 14:48:06 -0700163 SESSION_MQ_CTRL_EVT_RING,
164 SVM_Q_WAIT, msg);
Florin Coras15531972018-08-12 23:50:53 -0700165 svm_msg_q_unlock (app_wrk->event_queue);
166 evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
Florin Coras52207f12018-07-12 14:48:06 -0700167 memset (evt, 0, sizeof (*evt));
168 evt->event_type = SESSION_CTRL_EVT_DISCONNECTED;
169 rmp = (session_disconnected_reply_msg_t *) evt->data;
170 rmp->handle = mp->handle;
171 rmp->context = mp->context;
172 rmp->retval = rv;
Florin Coras15531972018-08-12 23:50:53 -0700173 svm_msg_q_add (app_wrk->event_queue, msg, SVM_Q_WAIT);
Florin Coras52207f12018-07-12 14:48:06 -0700174}
175
176static void
177session_mq_disconnected_reply_handler (void *data)
178{
179 session_disconnected_reply_msg_t *mp;
180 vnet_disconnect_args_t _a, *a = &_a;
181 application_t *app;
182
183 mp = (session_disconnected_reply_msg_t *) data;
184
185 /* Client objected to disconnecting the session, log and continue */
186 if (mp->retval)
187 {
188 clib_warning ("client retval %d", mp->retval);
189 return;
190 }
191
192 /* Disconnect has been confirmed. Confirm close to transport */
193 app = application_lookup (mp->context);
194 if (app)
195 {
196 a->handle = mp->handle;
Florin Coras15531972018-08-12 23:50:53 -0700197 a->app_index = app->app_index;
Florin Coras52207f12018-07-12 14:48:06 -0700198 vnet_disconnect_session (a);
199 }
200}
201
Dave Barach68b0fb02017-02-28 15:15:56 -0500202vlib_node_registration_t session_queue_node;
203
204typedef struct
205{
206 u32 session_index;
207 u32 server_thread_index;
208} session_queue_trace_t;
209
210/* packet trace format function */
211static u8 *
212format_session_queue_trace (u8 * s, va_list * args)
213{
214 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
215 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
216 session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
217
218 s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
219 t->session_index, t->server_thread_index);
220 return s;
221}
222
Florin Coras6792ec02017-03-13 03:49:51 -0700223#define foreach_session_queue_error \
224_(TX, "Packets transmitted") \
Florin Coras93992a92017-05-24 18:03:56 -0700225_(TIMER, "Timer events") \
226_(NO_BUFFER, "Out of buffers")
Dave Barach68b0fb02017-02-28 15:15:56 -0500227
228typedef enum
229{
230#define _(sym,str) SESSION_QUEUE_ERROR_##sym,
231 foreach_session_queue_error
232#undef _
233 SESSION_QUEUE_N_ERROR,
234} session_queue_error_t;
235
236static char *session_queue_error_strings[] = {
237#define _(sym,string) string,
238 foreach_session_queue_error
239#undef _
240};
241
Florin Coras0d60a0f2018-06-29 02:02:08 -0700242enum
243{
244 SESSION_TX_NO_BUFFERS = -2,
245 SESSION_TX_NO_DATA,
246 SESSION_TX_OK
247};
248
Florin Coras66cf5e02018-06-08 09:17:39 -0700249static void
250session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
251 u32 next_index, u32 * to_next, u16 n_segs,
252 stream_session_t * s, u32 n_trace)
Florin Corasf6d68ed2017-05-07 19:12:02 -0700253{
Florin Coras8e43d042018-05-04 15:46:57 -0700254 session_queue_trace_t *t;
Florin Coras66cf5e02018-06-08 09:17:39 -0700255 vlib_buffer_t *b;
256 int i;
257
258 for (i = 0; i < clib_min (n_trace, n_segs); i++)
259 {
260 b = vlib_get_buffer (vm, to_next[i - n_segs]);
261 vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
Florin Coras66cf5e02018-06-08 09:17:39 -0700262 t = vlib_add_trace (vm, node, b, sizeof (*t));
263 t->session_index = s->session_index;
264 t->server_thread_index = s->thread_index;
265 }
Florin Coras4df38712018-06-20 12:44:16 -0700266 vlib_set_trace_count (vm, node, n_trace - i);
Florin Coras8e43d042018-05-04 15:46:57 -0700267}
Florin Corasf6d68ed2017-05-07 19:12:02 -0700268
Florin Coras8e43d042018-05-04 15:46:57 -0700269always_inline void
270session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
271 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
272{
273 session_manager_main_t *smm = &session_manager_main;
274 vlib_buffer_t *chain_b, *prev_b;
275 u32 chain_bi0, to_deq, left_from_seg;
276 u16 len_to_deq, n_bytes_read;
277 u8 *data, j;
Florin Corasb2215d62017-08-01 16:56:58 -0700278
Florin Coras8e43d042018-05-04 15:46:57 -0700279 b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
280 b->total_length_not_including_first_buffer = 0;
281
282 chain_b = b;
283 left_from_seg = clib_min (ctx->snd_mss - b->current_length,
284 ctx->left_to_snd);
Florin Corasb2215d62017-08-01 16:56:58 -0700285 to_deq = left_from_seg;
Florin Coras8e43d042018-05-04 15:46:57 -0700286 for (j = 1; j < ctx->n_bufs_per_seg; j++)
Florin Corasf6d68ed2017-05-07 19:12:02 -0700287 {
Florin Coras8e43d042018-05-04 15:46:57 -0700288 prev_b = chain_b;
289 len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
Florin Corasf6d68ed2017-05-07 19:12:02 -0700290
291 *n_bufs -= 1;
Florin Coras8e43d042018-05-04 15:46:57 -0700292 chain_bi0 = smm->tx_buffers[ctx->s->thread_index][*n_bufs];
293 _vec_len (smm->tx_buffers[ctx->s->thread_index]) = *n_bufs;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700294
Florin Coras8e43d042018-05-04 15:46:57 -0700295 chain_b = vlib_get_buffer (vm, chain_bi0);
296 chain_b->current_data = 0;
297 data = vlib_buffer_get_current (chain_b);
Florin Corasf6d68ed2017-05-07 19:12:02 -0700298 if (peek_data)
299 {
Florin Coras8e43d042018-05-04 15:46:57 -0700300 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo,
301 ctx->tx_offset, len_to_deq, data);
302 ctx->tx_offset += n_bytes_read;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700303 }
304 else
305 {
Florin Coras8e43d042018-05-04 15:46:57 -0700306 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
Florin Coras7fb0fe12018-04-09 09:24:52 -0700307 {
Florin Coras8e43d042018-05-04 15:46:57 -0700308 svm_fifo_t *f = ctx->s->server_tx_fifo;
309 session_dgram_hdr_t *hdr = &ctx->hdr;
Florin Coras7fb0fe12018-04-09 09:24:52 -0700310 u16 deq_now;
Florin Coras7fb0fe12018-04-09 09:24:52 -0700311 deq_now = clib_min (hdr->data_length - hdr->data_offset,
Florin Coras8e43d042018-05-04 15:46:57 -0700312 len_to_deq);
313 n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
314 data);
Florin Coras7fb0fe12018-04-09 09:24:52 -0700315 ASSERT (n_bytes_read > 0);
316
317 hdr->data_offset += n_bytes_read;
318 if (hdr->data_offset == hdr->data_length)
shubing guoaea5f392018-08-30 13:29:49 +0800319 {
320 u32 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
321 svm_fifo_dequeue_drop (f, offset);
322 }
Florin Coras7fb0fe12018-04-09 09:24:52 -0700323 }
324 else
Florin Coras8e43d042018-05-04 15:46:57 -0700325 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
326 len_to_deq, data);
Florin Corasf6d68ed2017-05-07 19:12:02 -0700327 }
Florin Coras8e43d042018-05-04 15:46:57 -0700328 ASSERT (n_bytes_read == len_to_deq);
329 chain_b->current_length = n_bytes_read;
330 b->total_length_not_including_first_buffer += chain_b->current_length;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700331
332 /* update previous buffer */
Florin Coras8e43d042018-05-04 15:46:57 -0700333 prev_b->next_buffer = chain_bi0;
334 prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700335
336 /* update current buffer */
Florin Coras8e43d042018-05-04 15:46:57 -0700337 chain_b->next_buffer = 0;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700338
Florin Corasb2215d62017-08-01 16:56:58 -0700339 to_deq -= n_bytes_read;
340 if (to_deq == 0)
Florin Corasf6d68ed2017-05-07 19:12:02 -0700341 break;
342 }
Florin Coras1f152cd2017-08-18 19:28:03 -0700343 ASSERT (to_deq == 0
Florin Coras8e43d042018-05-04 15:46:57 -0700344 && b->total_length_not_including_first_buffer == left_from_seg);
345 ctx->left_to_snd -= left_from_seg;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700346}
347
Dave Barach68b0fb02017-02-28 15:15:56 -0500348always_inline int
Florin Coras8e43d042018-05-04 15:46:57 -0700349session_output_try_get_buffers (vlib_main_t * vm,
Florin Corasd79b41e2017-03-04 05:37:52 -0800350 session_manager_main_t * smm,
Florin Coras8e43d042018-05-04 15:46:57 -0700351 u32 thread_index, u16 * n_bufs, u32 wanted)
Dave Barach68b0fb02017-02-28 15:15:56 -0500352{
Florin Corasf08f26d2018-05-10 13:20:47 -0700353 u32 n_alloc;
354 vec_validate_aligned (smm->tx_buffers[thread_index], wanted - 1,
Florin Coras8e43d042018-05-04 15:46:57 -0700355 CLIB_CACHE_LINE_BYTES);
Florin Corasf08f26d2018-05-10 13:20:47 -0700356 n_alloc = vlib_buffer_alloc (vm, &smm->tx_buffers[thread_index][*n_bufs],
357 wanted - *n_bufs);
358 *n_bufs += n_alloc;
Florin Coras8e43d042018-05-04 15:46:57 -0700359 _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
Florin Corasf08f26d2018-05-10 13:20:47 -0700360 return n_alloc;
Florin Coras8e43d042018-05-04 15:46:57 -0700361}
362
363always_inline void
364session_tx_fill_buffer (vlib_main_t * vm, session_tx_context_t * ctx,
365 vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
366{
367 u32 len_to_deq;
368 u8 *data0;
369 int n_bytes_read;
370
371 /*
372 * Start with the first buffer in chain
373 */
374 b->error = 0;
375 b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
376 b->current_data = 0;
Florin Coras8e43d042018-05-04 15:46:57 -0700377
378 data0 = vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
379 len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
380
Florin Coras7fb0fe12018-04-09 09:24:52 -0700381 if (peek_data)
382 {
Florin Coras8e43d042018-05-04 15:46:57 -0700383 n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo, ctx->tx_offset,
384 len_to_deq, data0);
385 ASSERT (n_bytes_read > 0);
386 /* Keep track of progress locally, transport is also supposed to
387 * increment it independently when pushing the header */
388 ctx->tx_offset += n_bytes_read;
Florin Coras7fb0fe12018-04-09 09:24:52 -0700389 }
390 else
391 {
Florin Coras8e43d042018-05-04 15:46:57 -0700392 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
393 {
394 session_dgram_hdr_t *hdr = &ctx->hdr;
395 svm_fifo_t *f = ctx->s->server_tx_fifo;
396 u16 deq_now;
397 u32 offset;
398
399 ASSERT (hdr->data_length > hdr->data_offset);
400 deq_now = clib_min (hdr->data_length - hdr->data_offset,
401 len_to_deq);
402 offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
403 n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
404 ASSERT (n_bytes_read > 0);
405
406 if (ctx->s->session_state == SESSION_STATE_LISTENING)
407 {
408 ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
409 ctx->tc->rmt_port = hdr->rmt_port;
410 }
411 hdr->data_offset += n_bytes_read;
412 if (hdr->data_offset == hdr->data_length)
413 {
414 offset = hdr->data_length + SESSION_CONN_HDR_LEN;
415 svm_fifo_dequeue_drop (f, offset);
416 }
417 }
Florin Coras7fb0fe12018-04-09 09:24:52 -0700418 else
419 {
Florin Coras8e43d042018-05-04 15:46:57 -0700420 n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
421 len_to_deq, data0);
422 ASSERT (n_bytes_read > 0);
Florin Coras7fb0fe12018-04-09 09:24:52 -0700423 }
424 }
Florin Coras8e43d042018-05-04 15:46:57 -0700425 b->current_length = n_bytes_read;
426 ctx->left_to_snd -= n_bytes_read;
Dave Barach68b0fb02017-02-28 15:15:56 -0500427
Florin Coras8e43d042018-05-04 15:46:57 -0700428 /*
429 * Fill in the remaining buffers in the chain, if any
430 */
431 if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
432 session_tx_fifo_chain_tail (vm, ctx, b, n_bufs, peek_data);
Dave Barach68b0fb02017-02-28 15:15:56 -0500433
Florin Coras8e43d042018-05-04 15:46:57 -0700434 /* *INDENT-OFF* */
Florin Coras8b20bf52018-06-14 14:55:50 -0700435 SESSION_EVT_DBG(SESSION_EVT_DEQ, ctx->s, ({
436 ed->data[0] = FIFO_EVENT_APP_TX;
437 ed->data[1] = ctx->max_dequeue;
Florin Coras8e43d042018-05-04 15:46:57 -0700438 ed->data[2] = len_to_deq;
Florin Coras8b20bf52018-06-14 14:55:50 -0700439 ed->data[3] = ctx->left_to_snd;
Florin Coras8e43d042018-05-04 15:46:57 -0700440 }));
441 /* *INDENT-ON* */
442}
443
444always_inline u8
445session_tx_not_ready (stream_session_t * s, u8 peek_data)
446{
447 if (peek_data)
Florin Corase04c2992017-03-01 08:17:34 -0800448 {
Florin Coras8e43d042018-05-04 15:46:57 -0700449 /* Can retransmit for closed sessions but can't send new data if
450 * session is not ready or closed */
451 if (s->session_state < SESSION_STATE_READY)
452 return 1;
Florin Corasca1c8f32018-05-23 21:01:30 -0700453 if (s->session_state == SESSION_STATE_CLOSED)
454 return 2;
Florin Corase04c2992017-03-01 08:17:34 -0800455 }
Florin Coras8e43d042018-05-04 15:46:57 -0700456 return 0;
457}
Dave Barach68b0fb02017-02-28 15:15:56 -0500458
Florin Coras8e43d042018-05-04 15:46:57 -0700459always_inline transport_connection_t *
460session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
461{
462 if (peek_data)
463 {
464 return ctx->transport_vft->get_connection (ctx->s->connection_index,
465 ctx->s->thread_index);
466 }
467 else
468 {
469 if (ctx->s->session_state == SESSION_STATE_LISTENING)
470 return ctx->transport_vft->get_listener (ctx->s->connection_index);
471 else
472 {
473 return ctx->transport_vft->get_connection (ctx->s->connection_index,
474 ctx->s->thread_index);
475 }
476 }
477}
Florin Coras6a9b68b2017-11-21 04:20:42 -0800478
Florin Coras8e43d042018-05-04 15:46:57 -0700479always_inline void
480session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
Florin Corasf08f26d2018-05-10 13:20:47 -0700481 u32 max_segs, u8 peek_data)
Florin Coras8e43d042018-05-04 15:46:57 -0700482{
483 u32 n_bytes_per_buf, n_bytes_per_seg;
484 ctx->max_dequeue = svm_fifo_max_dequeue (ctx->s->server_tx_fifo);
Dave Barach68b0fb02017-02-28 15:15:56 -0500485 if (peek_data)
486 {
Florin Coras9d063042017-09-14 03:08:00 -0400487 /* Offset in rx fifo from where to peek data */
Florin Coras8e43d042018-05-04 15:46:57 -0700488 ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
489 if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
490 {
491 ctx->max_len_to_snd = 0;
492 return;
493 }
494 ctx->max_dequeue -= ctx->tx_offset;
Dave Barach68b0fb02017-02-28 15:15:56 -0500495 }
Florin Coras7fb0fe12018-04-09 09:24:52 -0700496 else
497 {
Florin Coras8e43d042018-05-04 15:46:57 -0700498 if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
Florin Coras7fb0fe12018-04-09 09:24:52 -0700499 {
Florin Coras8e43d042018-05-04 15:46:57 -0700500 if (ctx->max_dequeue <= sizeof (ctx->hdr))
501 {
502 ctx->max_len_to_snd = 0;
503 return;
504 }
505 svm_fifo_peek (ctx->s->server_tx_fifo, 0, sizeof (ctx->hdr),
506 (u8 *) & ctx->hdr);
507 ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
508 ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
Florin Coras7fb0fe12018-04-09 09:24:52 -0700509 }
510 }
Florin Coras8e43d042018-05-04 15:46:57 -0700511 ASSERT (ctx->max_dequeue > 0);
Florin Coras6792ec02017-03-13 03:49:51 -0700512
513 /* Ensure we're not writing more than transport window allows */
Florin Coras8e43d042018-05-04 15:46:57 -0700514 if (ctx->max_dequeue < ctx->snd_space)
Florin Coras3e350af2017-03-30 02:54:28 -0700515 {
516 /* Constrained by tx queue. Try to send only fully formed segments */
Florin Coras8e43d042018-05-04 15:46:57 -0700517 ctx->max_len_to_snd =
518 (ctx->max_dequeue > ctx->snd_mss) ?
519 ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
Florin Coras3e350af2017-03-30 02:54:28 -0700520 /* TODO Nagle ? */
521 }
522 else
523 {
Florin Coras1f152cd2017-08-18 19:28:03 -0700524 /* Expectation is that snd_space0 is already a multiple of snd_mss */
Florin Coras8e43d042018-05-04 15:46:57 -0700525 ctx->max_len_to_snd = ctx->snd_space;
Florin Coras3e350af2017-03-30 02:54:28 -0700526 }
Dave Barach68b0fb02017-02-28 15:15:56 -0500527
Florin Corasf08f26d2018-05-10 13:20:47 -0700528 /* Check if we're tx constrained by the node */
529 ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
530 if (ctx->n_segs_per_evt > max_segs)
531 {
532 ctx->n_segs_per_evt = max_segs;
533 ctx->max_len_to_snd = max_segs * ctx->snd_mss;
534 }
535
Florin Coras8e43d042018-05-04 15:46:57 -0700536 n_bytes_per_buf = vlib_buffer_free_list_buffer_size (vm,
537 VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
Florin Corase87216f2017-08-17 16:59:22 -0700538 ASSERT (n_bytes_per_buf > MAX_HDRS_LEN);
Florin Coras8e43d042018-05-04 15:46:57 -0700539 n_bytes_per_seg = MAX_HDRS_LEN + ctx->snd_mss;
Florin Corasf08f26d2018-05-10 13:20:47 -0700540 ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
Florin Coras8e43d042018-05-04 15:46:57 -0700541 ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
542 ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
543 n_bytes_per_buf - MAX_HDRS_LEN);
544}
Florin Corasf6d68ed2017-05-07 19:12:02 -0700545
Florin Coras8e43d042018-05-04 15:46:57 -0700546always_inline int
547session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
Florin Coras52207f12018-07-12 14:48:06 -0700548 session_event_t * e,
Florin Coras8e43d042018-05-04 15:46:57 -0700549 stream_session_t * s, int *n_tx_packets,
550 u8 peek_data)
551{
Florin Coras66cf5e02018-06-08 09:17:39 -0700552 u32 next_index, next0, next1, *to_next, n_left_to_next;
Florin Corasf08f26d2018-05-10 13:20:47 -0700553 u32 n_trace = vlib_get_trace_count (vm, node), n_bufs_needed = 0;
554 u32 thread_index = s->thread_index, n_left, pbi;
Florin Coras8e43d042018-05-04 15:46:57 -0700555 session_manager_main_t *smm = &session_manager_main;
556 session_tx_context_t *ctx = &smm->ctx[thread_index];
557 transport_proto_t tp;
558 vlib_buffer_t *pb;
Florin Corasca1c8f32018-05-23 21:01:30 -0700559 u16 n_bufs, rv;
Florin Coras8e43d042018-05-04 15:46:57 -0700560
Florin Corasca1c8f32018-05-23 21:01:30 -0700561 if (PREDICT_FALSE ((rv = session_tx_not_ready (s, peek_data))))
Florin Coras8e43d042018-05-04 15:46:57 -0700562 {
Florin Corasca1c8f32018-05-23 21:01:30 -0700563 if (rv < 2)
564 vec_add1 (smm->pending_event_vector[thread_index], *e);
Florin Coras0d60a0f2018-06-29 02:02:08 -0700565 return SESSION_TX_NO_DATA;
Florin Coras8e43d042018-05-04 15:46:57 -0700566 }
567
568 next_index = smm->session_type_to_next[s->session_type];
Florin Coras66cf5e02018-06-08 09:17:39 -0700569 next0 = next1 = next_index;
Florin Coras8e43d042018-05-04 15:46:57 -0700570
571 tp = session_get_transport_proto (s);
572 ctx->s = s;
573 ctx->transport_vft = transport_protocol_get_vft (tp);
574 ctx->tc = session_tx_get_transport (ctx, peek_data);
575 ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
576 ctx->snd_space = ctx->transport_vft->send_space (ctx->tc);
577 if (ctx->snd_space == 0 || ctx->snd_mss == 0)
578 {
579 vec_add1 (smm->pending_event_vector[thread_index], *e);
Florin Coras0d60a0f2018-06-29 02:02:08 -0700580 return SESSION_TX_NO_DATA;
Florin Coras8e43d042018-05-04 15:46:57 -0700581 }
582
583 /* Allow enqueuing of a new event */
584 svm_fifo_unset_event (s->server_tx_fifo);
585
586 /* Check how much we can pull. */
Florin Corasf08f26d2018-05-10 13:20:47 -0700587 session_tx_set_dequeue_params (vm, ctx, VLIB_FRAME_SIZE - *n_tx_packets,
588 peek_data);
589
Florin Coras8e43d042018-05-04 15:46:57 -0700590 if (PREDICT_FALSE (!ctx->max_len_to_snd))
Florin Coras0d60a0f2018-06-29 02:02:08 -0700591 return SESSION_TX_NO_DATA;
Dave Barach68b0fb02017-02-28 15:15:56 -0500592
593 n_bufs = vec_len (smm->tx_buffers[thread_index]);
Florin Corasf08f26d2018-05-10 13:20:47 -0700594 n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
Florin Coras8e43d042018-05-04 15:46:57 -0700595
596 /*
597 * Make sure we have at least one full frame of buffers ready
598 */
Florin Corasf08f26d2018-05-10 13:20:47 -0700599 if (n_bufs < n_bufs_needed)
Dave Barach68b0fb02017-02-28 15:15:56 -0500600 {
Florin Coras8e43d042018-05-04 15:46:57 -0700601 session_output_try_get_buffers (vm, smm, thread_index, &n_bufs,
Florin Corasf08f26d2018-05-10 13:20:47 -0700602 ctx->n_bufs_per_seg * VLIB_FRAME_SIZE);
603 if (PREDICT_FALSE (n_bufs < n_bufs_needed))
Dave Barach68b0fb02017-02-28 15:15:56 -0500604 {
Florin Coras8e43d042018-05-04 15:46:57 -0700605 vec_add1 (smm->pending_event_vector[thread_index], *e);
Florin Coras0d60a0f2018-06-29 02:02:08 -0700606 return SESSION_TX_NO_BUFFERS;
Dave Barach68b0fb02017-02-28 15:15:56 -0500607 }
Florin Coras8e43d042018-05-04 15:46:57 -0700608 }
Dave Barach68b0fb02017-02-28 15:15:56 -0500609
Florin Coras8e43d042018-05-04 15:46:57 -0700610 /*
611 * Write until we fill up a frame
612 */
613 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
Florin Corasf08f26d2018-05-10 13:20:47 -0700614 if (PREDICT_FALSE (ctx->n_segs_per_evt > n_left_to_next))
Florin Coras8e43d042018-05-04 15:46:57 -0700615 {
Florin Corasf08f26d2018-05-10 13:20:47 -0700616 ctx->n_segs_per_evt = n_left_to_next;
617 ctx->max_len_to_snd = ctx->snd_mss * n_left_to_next;
618 }
619 ctx->left_to_snd = ctx->max_len_to_snd;
620 n_left = ctx->n_segs_per_evt;
Florin Coras66cf5e02018-06-08 09:17:39 -0700621
622 while (n_left >= 4)
623 {
624 vlib_buffer_t *b0, *b1;
625 u32 bi0, bi1;
626
627 pbi = smm->tx_buffers[thread_index][n_bufs - 3];
628 pb = vlib_get_buffer (vm, pbi);
629 vlib_prefetch_buffer_header (pb, STORE);
630 pbi = smm->tx_buffers[thread_index][n_bufs - 4];
631 pb = vlib_get_buffer (vm, pbi);
632 vlib_prefetch_buffer_header (pb, STORE);
633
634 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
635 to_next[1] = bi1 = smm->tx_buffers[thread_index][--n_bufs];
636
637 b0 = vlib_get_buffer (vm, bi0);
638 b1 = vlib_get_buffer (vm, bi1);
639
640 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
641 session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
642
643 ctx->transport_vft->push_header (ctx->tc, b0);
644 ctx->transport_vft->push_header (ctx->tc, b1);
645
646 to_next += 2;
647 n_left_to_next -= 2;
648 n_left -= 2;
649
650 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
651 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
652
653 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
654 n_left_to_next, bi0, bi1, next0,
655 next1);
656 }
Florin Corasf08f26d2018-05-10 13:20:47 -0700657 while (n_left)
658 {
Florin Coras66cf5e02018-06-08 09:17:39 -0700659 vlib_buffer_t *b0;
660 u32 bi0;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700661
Florin Coras91ca4622018-06-30 11:27:59 -0700662 if (n_left > 1)
663 {
664 pbi = smm->tx_buffers[thread_index][n_bufs - 2];
665 pb = vlib_get_buffer (vm, pbi);
666 vlib_prefetch_buffer_header (pb, STORE);
667 }
668
Florin Coras66cf5e02018-06-08 09:17:39 -0700669 to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
670 b0 = vlib_get_buffer (vm, bi0);
671 session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
Florin Coras81a13db2018-03-16 08:48:31 -0700672
Florin Coras66cf5e02018-06-08 09:17:39 -0700673 /* Ask transport to push header after current_length and
674 * total_length_not_including_first_buffer are updated */
675 ctx->transport_vft->push_header (ctx->tc, b0);
Florin Corasf6359c82017-06-19 12:26:09 -0400676
Florin Coras66cf5e02018-06-08 09:17:39 -0700677 to_next += 1;
678 n_left_to_next -= 1;
679 n_left -= 1;
Dave Barach68b0fb02017-02-28 15:15:56 -0500680
Florin Coras66cf5e02018-06-08 09:17:39 -0700681 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
Florin Coras7fb0fe12018-04-09 09:24:52 -0700682
Florin Coras66cf5e02018-06-08 09:17:39 -0700683 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
684 n_left_to_next, bi0, next0);
Dave Barach68b0fb02017-02-28 15:15:56 -0500685 }
Florin Coras66cf5e02018-06-08 09:17:39 -0700686
687 if (PREDICT_FALSE (n_trace > 0))
688 session_tx_trace_frame (vm, node, next_index, to_next,
689 ctx->n_segs_per_evt, s, n_trace);
690
Florin Coras8e43d042018-05-04 15:46:57 -0700691 _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
Florin Corasf08f26d2018-05-10 13:20:47 -0700692 *n_tx_packets += ctx->n_segs_per_evt;
Florin Coras8e43d042018-05-04 15:46:57 -0700693 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
Dave Barach68b0fb02017-02-28 15:15:56 -0500694
Florin Coras6792ec02017-03-13 03:49:51 -0700695 /* If we couldn't dequeue all bytes mark as partially read */
Florin Corasf08f26d2018-05-10 13:20:47 -0700696 ASSERT (ctx->left_to_snd == 0);
Florin Coras8e43d042018-05-04 15:46:57 -0700697 if (ctx->max_len_to_snd < ctx->max_dequeue)
698 if (svm_fifo_set_event (s->server_tx_fifo))
699 vec_add1 (smm->pending_event_vector[thread_index], *e);
Florin Coras7fb0fe12018-04-09 09:24:52 -0700700
Florin Coras8e43d042018-05-04 15:46:57 -0700701 if (!peek_data && ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
Dave Barach68b0fb02017-02-28 15:15:56 -0500702 {
Florin Coras7fb0fe12018-04-09 09:24:52 -0700703 /* Fix dgram pre header */
Florin Coras8e43d042018-05-04 15:46:57 -0700704 if (ctx->max_len_to_snd < ctx->max_dequeue)
705 svm_fifo_overwrite_head (s->server_tx_fifo, (u8 *) & ctx->hdr,
Florin Coras7fb0fe12018-04-09 09:24:52 -0700706 sizeof (session_dgram_pre_hdr_t));
707 /* More data needs to be read */
Florin Coras8e43d042018-05-04 15:46:57 -0700708 else if (svm_fifo_max_dequeue (s->server_tx_fifo) > 0)
709 if (svm_fifo_set_event (s->server_tx_fifo))
710 vec_add1 (smm->pending_event_vector[thread_index], *e);
Dave Barach68b0fb02017-02-28 15:15:56 -0500711 }
Florin Coras0d60a0f2018-06-29 02:02:08 -0700712 return SESSION_TX_OK;
Dave Barach68b0fb02017-02-28 15:15:56 -0500713}
714
715int
Florin Corasd79b41e2017-03-04 05:37:52 -0800716session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
Florin Coras52207f12018-07-12 14:48:06 -0700717 session_event_t * e,
Florin Coras0d60a0f2018-06-29 02:02:08 -0700718 stream_session_t * s, int *n_tx_pkts)
Dave Barach68b0fb02017-02-28 15:15:56 -0500719{
Florin Coras0d60a0f2018-06-29 02:02:08 -0700720 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 1);
Dave Barach68b0fb02017-02-28 15:15:56 -0500721}
722
723int
Florin Corasd79b41e2017-03-04 05:37:52 -0800724session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
Florin Coras52207f12018-07-12 14:48:06 -0700725 session_event_t * e,
Florin Coras0d60a0f2018-06-29 02:02:08 -0700726 stream_session_t * s, int *n_tx_pkts)
Dave Barach68b0fb02017-02-28 15:15:56 -0500727{
Florin Coras0d60a0f2018-06-29 02:02:08 -0700728 return session_tx_fifo_read_and_snd_i (vm, node, e, s, n_tx_pkts, 0);
Dave Barach68b0fb02017-02-28 15:15:56 -0500729}
730
Florin Coras371ca502018-02-21 12:07:41 -0800731int
732session_tx_fifo_dequeue_internal (vlib_main_t * vm,
733 vlib_node_runtime_t * node,
Florin Coras52207f12018-07-12 14:48:06 -0700734 session_event_t * e,
Florin Coras0d60a0f2018-06-29 02:02:08 -0700735 stream_session_t * s, int *n_tx_pkts)
Florin Coras371ca502018-02-21 12:07:41 -0800736{
737 application_t *app;
Florin Corasab2f6db2018-08-31 14:31:41 -0700738 app = application_get (s->t_app_index);
Florin Coras0d60a0f2018-06-29 02:02:08 -0700739 svm_fifo_unset_event (s->server_tx_fifo);
740 return app->cb_fns.builtin_app_tx_callback (s);
Florin Coras371ca502018-02-21 12:07:41 -0800741}
742
Dave Barach2c25a622017-06-26 11:35:07 -0400743always_inline stream_session_t *
Florin Coras52207f12018-07-12 14:48:06 -0700744session_event_get_session (session_event_t * e, u8 thread_index)
Florin Corasa5464812017-04-19 13:00:05 -0700745{
Florin Coras3cbc04b2017-10-02 00:18:51 -0700746 return session_get_if_valid (e->fifo->master_session_index, thread_index);
Florin Corasa5464812017-04-19 13:00:05 -0700747}
748
Florin Coras0d60a0f2018-06-29 02:02:08 -0700749static uword
750session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
751 vlib_frame_t * frame)
752{
753 session_manager_main_t *smm = vnet_get_session_manager_main ();
Florin Coras3c2fed52018-07-04 04:15:05 -0700754 u32 thread_index = vm->thread_index, n_to_dequeue, n_events;
Florin Coras52207f12018-07-12 14:48:06 -0700755 session_event_t *pending_events, *e;
756 session_event_t *fifo_events;
Florin Coras3c2fed52018-07-04 04:15:05 -0700757 svm_msg_q_msg_t _msg, *msg = &_msg;
Florin Coras0d60a0f2018-06-29 02:02:08 -0700758 f64 now = vlib_time_now (vm);
Florin Coras3c2fed52018-07-04 04:15:05 -0700759 int n_tx_packets = 0, i, rv;
Florin Coras15531972018-08-12 23:50:53 -0700760 app_worker_t *app_wrk;
Florin Coras3c2fed52018-07-04 04:15:05 -0700761 application_t *app;
762 svm_msg_q_t *mq;
Florin Coras0d60a0f2018-06-29 02:02:08 -0700763 void (*fp) (void *);
764
765 SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, thread_index);
766
767 /*
768 * Update transport time
769 */
770 transport_update_time (now, thread_index);
771
772 /*
Florin Coras3c2fed52018-07-04 04:15:05 -0700773 * Get vpp queue events that we can dequeue without blocking
Florin Coras0d60a0f2018-06-29 02:02:08 -0700774 */
Florin Coras3c2fed52018-07-04 04:15:05 -0700775 mq = smm->vpp_event_queues[thread_index];
Florin Coras0d60a0f2018-06-29 02:02:08 -0700776 fifo_events = smm->free_event_vector[thread_index];
Florin Coras3c2fed52018-07-04 04:15:05 -0700777 n_to_dequeue = svm_msg_q_size (mq);
Florin Coras0d60a0f2018-06-29 02:02:08 -0700778 pending_events = smm->pending_event_vector[thread_index];
779
780 if (!n_to_dequeue && !vec_len (pending_events)
781 && !vec_len (smm->pending_disconnects[thread_index]))
782 return 0;
783
784 SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
785
786 /*
787 * If we didn't manage to process previous events try going
788 * over them again without dequeuing new ones.
789 * XXX: Handle senders to sessions that can't keep up
790 */
791 if (0 && vec_len (pending_events) >= 100)
792 {
793 clib_warning ("too many fifo events unsolved");
794 goto skip_dequeue;
795 }
796
797 /* See you in the next life, don't be late
Florin Coras3c2fed52018-07-04 04:15:05 -0700798 * XXX: we may need priorities here */
799 if (svm_msg_q_try_lock (mq))
Florin Coras0d60a0f2018-06-29 02:02:08 -0700800 return 0;
801
802 for (i = 0; i < n_to_dequeue; i++)
803 {
804 vec_add2 (fifo_events, e, 1);
Florin Coras3c2fed52018-07-04 04:15:05 -0700805 svm_msg_q_sub_w_lock (mq, msg);
806 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), sizeof (*e));
807 svm_msg_q_free_msg (mq, msg);
Florin Coras0d60a0f2018-06-29 02:02:08 -0700808 }
809
Florin Coras3c2fed52018-07-04 04:15:05 -0700810 svm_msg_q_unlock (mq);
Florin Coras0d60a0f2018-06-29 02:02:08 -0700811
812 vec_append (fifo_events, pending_events);
813 vec_append (fifo_events, smm->pending_disconnects[thread_index]);
814
815 _vec_len (pending_events) = 0;
816 smm->pending_event_vector[thread_index] = pending_events;
817 _vec_len (smm->pending_disconnects[thread_index]) = 0;
818
819skip_dequeue:
820 n_events = vec_len (fifo_events);
821 for (i = 0; i < n_events; i++)
822 {
823 stream_session_t *s; /* $$$ prefetch 1 ahead maybe */
Florin Coras52207f12018-07-12 14:48:06 -0700824 session_event_t *e;
Florin Coras54693d22018-07-17 10:46:29 -0700825 u8 is_full;
Florin Coras0d60a0f2018-06-29 02:02:08 -0700826
827 e = &fifo_events[i];
828 switch (e->event_type)
829 {
830 case FIFO_EVENT_APP_TX:
831 /* Don't try to send more that one frame per dispatch cycle */
832 if (n_tx_packets == VLIB_FRAME_SIZE)
833 {
834 vec_add1 (smm->pending_event_vector[thread_index], *e);
835 break;
836 }
837
838 s = session_event_get_session (e, thread_index);
839 if (PREDICT_FALSE (!s))
840 {
841 clib_warning ("It's dead, Jim!");
842 continue;
843 }
Florin Coras54693d22018-07-17 10:46:29 -0700844 is_full = svm_fifo_is_full (s->server_tx_fifo);
Florin Coras0d60a0f2018-06-29 02:02:08 -0700845
846 /* Spray packets in per session type frames, since they go to
847 * different nodes */
848 rv = (smm->session_tx_fns[s->session_type]) (vm, node, e, s,
849 &n_tx_packets);
850 if (PREDICT_TRUE (rv == SESSION_TX_OK))
851 {
Florin Coras46f001d2018-07-11 05:25:06 -0700852 /* Notify app there's tx space if not polling */
Florin Coras54693d22018-07-17 10:46:29 -0700853 if (PREDICT_FALSE (is_full
Florin Coras46f001d2018-07-11 05:25:06 -0700854 && !svm_fifo_has_event (s->server_tx_fifo)))
855 session_dequeue_notify (s);
Florin Coras0d60a0f2018-06-29 02:02:08 -0700856 }
857 else if (PREDICT_FALSE (rv == SESSION_TX_NO_BUFFERS))
858 {
859 vlib_node_increment_counter (vm, node->node_index,
860 SESSION_QUEUE_ERROR_NO_BUFFER, 1);
861 continue;
862 }
863 break;
864 case FIFO_EVENT_DISCONNECT:
865 /* Make sure stream disconnects run after the pending list is
866 * drained */
867 s = session_get_from_handle (e->session_handle);
868 if (!e->postponed)
869 {
870 e->postponed = 1;
871 vec_add1 (smm->pending_disconnects[thread_index], *e);
872 continue;
873 }
874 /* If tx queue is still not empty, wait */
875 if (svm_fifo_max_dequeue (s->server_tx_fifo))
876 {
877 vec_add1 (smm->pending_disconnects[thread_index], *e);
878 continue;
879 }
880
881 stream_session_disconnect_transport (s);
882 break;
883 case FIFO_EVENT_BUILTIN_RX:
884 s = session_event_get_session (e, thread_index);
885 if (PREDICT_FALSE (!s))
886 continue;
887 svm_fifo_unset_event (s->server_rx_fifo);
Florin Coras15531972018-08-12 23:50:53 -0700888 app_wrk = app_worker_get (s->app_wrk_index);
889 app = application_get (app_wrk->app_index);
Florin Coras0d60a0f2018-06-29 02:02:08 -0700890 app->cb_fns.builtin_app_rx_callback (s);
891 break;
892 case FIFO_EVENT_RPC:
893 fp = e->rpc_args.fp;
894 (*fp) (e->rpc_args.arg);
895 break;
Florin Coras52207f12018-07-12 14:48:06 -0700896 case SESSION_CTRL_EVT_DISCONNECTED:
897 session_mq_disconnected_handler (e->data);
898 break;
899 case SESSION_CTRL_EVT_ACCEPTED_REPLY:
900 session_mq_accepted_reply_handler (e->data);
901 break;
902 case SESSION_CTRL_EVT_CONNECTED_REPLY:
903 break;
904 case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
905 session_mq_disconnected_reply_handler (e->data);
906 break;
907 case SESSION_CTRL_EVT_RESET_REPLY:
908 session_mq_reset_reply_handler (e->data);
909 break;
Florin Coras0d60a0f2018-06-29 02:02:08 -0700910 default:
911 clib_warning ("unhandled event type %d", e->event_type);
912 }
913 }
914
915 _vec_len (fifo_events) = 0;
916 smm->free_event_vector[thread_index] = fifo_events;
917
918 vlib_node_increment_counter (vm, session_queue_node.index,
919 SESSION_QUEUE_ERROR_TX, n_tx_packets);
920
921 SESSION_EVT_DBG (SESSION_EVT_DISPATCH_END, smm, thread_index);
922
923 return n_tx_packets;
924}
925
926/* *INDENT-OFF* */
927VLIB_REGISTER_NODE (session_queue_node) =
928{
929 .function = session_queue_node_fn,
930 .name = "session-queue",
931 .format_trace = format_session_queue_trace,
932 .type = VLIB_NODE_TYPE_INPUT,
933 .n_errors = ARRAY_LEN (session_queue_error_strings),
934 .error_strings = session_queue_error_strings,
935 .state = VLIB_NODE_STATE_DISABLED,
936};
937/* *INDENT-ON* */
938
Dave Barachacd2a6a2017-05-16 17:41:34 -0400939void
940dump_thread_0_event_queue (void)
941{
942 session_manager_main_t *smm = vnet_get_session_manager_main ();
943 vlib_main_t *vm = &vlib_global_main;
944 u32 my_thread_index = vm->thread_index;
Florin Coras52207f12018-07-12 14:48:06 -0700945 session_event_t _e, *e = &_e;
Florin Coras3c2fed52018-07-04 04:15:05 -0700946 svm_msg_q_ring_t *ring;
Dave Barachacd2a6a2017-05-16 17:41:34 -0400947 stream_session_t *s0;
Florin Coras3c2fed52018-07-04 04:15:05 -0700948 svm_msg_q_msg_t *msg;
949 svm_msg_q_t *mq;
Dave Barachacd2a6a2017-05-16 17:41:34 -0400950 int i, index;
Dave Barachacd2a6a2017-05-16 17:41:34 -0400951
Florin Coras3c2fed52018-07-04 04:15:05 -0700952 mq = smm->vpp_event_queues[my_thread_index];
953 index = mq->q->head;
Dave Barachacd2a6a2017-05-16 17:41:34 -0400954
Florin Coras3c2fed52018-07-04 04:15:05 -0700955 for (i = 0; i < mq->q->cursize; i++)
Dave Barachacd2a6a2017-05-16 17:41:34 -0400956 {
Florin Coras3c2fed52018-07-04 04:15:05 -0700957 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
958 ring = svm_msg_q_ring (mq, msg->ring_index);
959 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
Dave Barachacd2a6a2017-05-16 17:41:34 -0400960
961 switch (e->event_type)
962 {
963 case FIFO_EVENT_APP_TX:
964 s0 = session_event_get_session (e, my_thread_index);
965 fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
966 break;
967
968 case FIFO_EVENT_DISCONNECT:
Florin Corascea194d2017-10-02 00:18:51 -0700969 s0 = session_get_from_handle (e->session_handle);
Dave Barachacd2a6a2017-05-16 17:41:34 -0400970 fformat (stdout, "[%04d] disconnect session %d\n", i,
971 s0->session_index);
972 break;
973
974 case FIFO_EVENT_BUILTIN_RX:
975 s0 = session_event_get_session (e, my_thread_index);
976 fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
977 break;
978
979 case FIFO_EVENT_RPC:
980 fformat (stdout, "[%04d] RPC call %llx with %llx\n",
981 i, (u64) (e->rpc_args.fp), (u64) (e->rpc_args.arg));
982 break;
983
984 default:
985 fformat (stdout, "[%04d] unhandled event type %d\n",
986 i, e->event_type);
987 break;
988 }
989
990 index++;
991
Florin Coras3c2fed52018-07-04 04:15:05 -0700992 if (index == mq->q->maxsize)
Dave Barachacd2a6a2017-05-16 17:41:34 -0400993 index = 0;
994 }
995}
996
Florin Coras6534b7a2017-07-18 05:38:03 -0400997static u8
Florin Coras52207f12018-07-12 14:48:06 -0700998session_node_cmp_event (session_event_t * e, svm_fifo_t * f)
Florin Coras6534b7a2017-07-18 05:38:03 -0400999{
1000 stream_session_t *s;
1001 switch (e->event_type)
1002 {
1003 case FIFO_EVENT_APP_RX:
1004 case FIFO_EVENT_APP_TX:
1005 case FIFO_EVENT_BUILTIN_RX:
1006 if (e->fifo == f)
1007 return 1;
1008 break;
1009 case FIFO_EVENT_DISCONNECT:
1010 break;
1011 case FIFO_EVENT_RPC:
Florin Corascea194d2017-10-02 00:18:51 -07001012 s = session_get_from_handle (e->session_handle);
Florin Coras6534b7a2017-07-18 05:38:03 -04001013 if (!s)
1014 {
1015 clib_warning ("session has event but doesn't exist!");
1016 break;
1017 }
1018 if (s->server_rx_fifo == f || s->server_tx_fifo == f)
1019 return 1;
1020 break;
1021 default:
1022 break;
1023 }
1024 return 0;
1025}
1026
1027u8
Florin Coras52207f12018-07-12 14:48:06 -07001028session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
Florin Coras6534b7a2017-07-18 05:38:03 -04001029{
1030 session_manager_main_t *smm = vnet_get_session_manager_main ();
Florin Coras3c2fed52018-07-04 04:15:05 -07001031 svm_msg_q_t *mq;
Florin Coras52207f12018-07-12 14:48:06 -07001032 session_event_t *pending_event_vector, *evt;
Florin Coras6534b7a2017-07-18 05:38:03 -04001033 int i, index, found = 0;
Florin Coras3c2fed52018-07-04 04:15:05 -07001034 svm_msg_q_msg_t *msg;
1035 svm_msg_q_ring_t *ring;
Florin Coras6534b7a2017-07-18 05:38:03 -04001036 u8 thread_index;
1037
1038 ASSERT (e);
1039 thread_index = f->master_thread_index;
1040 /*
1041 * Search evt queue
1042 */
Florin Coras3c2fed52018-07-04 04:15:05 -07001043 mq = smm->vpp_event_queues[thread_index];
1044 index = mq->q->head;
1045 for (i = 0; i < mq->q->cursize; i++)
Florin Coras6534b7a2017-07-18 05:38:03 -04001046 {
Florin Coras3c2fed52018-07-04 04:15:05 -07001047 msg = (svm_msg_q_msg_t *) (&mq->q->data[0] + mq->q->elsize * index);
1048 ring = svm_msg_q_ring (mq, msg->ring_index);
1049 clib_memcpy (e, svm_msg_q_msg_data (mq, msg), ring->elsize);
Florin Coras6534b7a2017-07-18 05:38:03 -04001050 found = session_node_cmp_event (e, f);
1051 if (found)
Florin Coras371ca502018-02-21 12:07:41 -08001052 return 1;
Florin Coras3c2fed52018-07-04 04:15:05 -07001053 if (++index == mq->q->maxsize)
Florin Coras6534b7a2017-07-18 05:38:03 -04001054 index = 0;
1055 }
1056 /*
1057 * Search pending events vector
1058 */
1059 pending_event_vector = smm->pending_event_vector[thread_index];
1060 vec_foreach (evt, pending_event_vector)
1061 {
1062 found = session_node_cmp_event (evt, f);
1063 if (found)
1064 {
1065 clib_memcpy (e, evt, sizeof (*evt));
1066 break;
1067 }
1068 }
1069 return found;
1070}
1071
Dave Barach2a863912017-11-28 10:11:42 -05001072static clib_error_t *
1073session_queue_exit (vlib_main_t * vm)
1074{
1075 if (vec_len (vlib_mains) < 2)
1076 return 0;
1077
1078 /*
1079 * Shut off (especially) worker-thread session nodes.
1080 * Otherwise, vpp can crash as the main thread unmaps the
1081 * API segment.
1082 */
1083 vlib_worker_thread_barrier_sync (vm);
1084 session_node_enable_disable (0 /* is_enable */ );
1085 vlib_worker_thread_barrier_release (vm);
1086 return 0;
1087}
1088
1089VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
1090
Florin Corasfd542f12018-05-16 19:28:24 -07001091static uword
1092session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
1093 vlib_frame_t * f)
1094{
1095 f64 now, timeout = 1.0;
1096 uword *event_data = 0;
1097 uword event_type;
1098
1099 while (1)
1100 {
1101 vlib_process_wait_for_event_or_clock (vm, timeout);
1102 now = vlib_time_now (vm);
1103 event_type = vlib_process_get_events (vm, (uword **) & event_data);
1104
1105 switch (event_type)
1106 {
1107 case SESSION_Q_PROCESS_FLUSH_FRAMES:
1108 /* Flush the frames by updating all transports times */
1109 transport_update_time (now, 0);
1110 break;
1111 case SESSION_Q_PROCESS_STOP:
1112 timeout = 100000.0;
1113 break;
1114 case ~0:
1115 /* Timed out. Update time for all transports to trigger all
1116 * outstanding retransmits. */
1117 transport_update_time (now, 0);
1118 break;
1119 }
1120 vec_reset_length (event_data);
1121 }
1122 return 0;
1123}
1124
1125/* *INDENT-OFF* */
1126VLIB_REGISTER_NODE (session_queue_process_node) =
1127{
1128 .function = session_queue_process,
1129 .type = VLIB_NODE_TYPE_PROCESS,
1130 .name = "session-queue-process",
1131 .state = VLIB_NODE_STATE_DISABLED,
1132};
1133/* *INDENT-ON* */
1134
1135
Dave Barach68b0fb02017-02-28 15:15:56 -05001136/*
1137 * fd.io coding-style-patch-verification: ON
1138 *
1139 * Local Variables:
1140 * eval: (c-set-style "gnu")
1141 * End:
1142 */