blob: 5893b6558f081f0fa49110b5258c9aa3a02bb56a [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/**
16 * @file
17 * @brief Session and session manager
18 */
19
20#include <vnet/session/session.h>
Florin Coras04e53442017-07-16 17:12:15 -070021#include <vnet/session/session_debug.h>
22#include <vnet/session/application.h>
Dave Barach68b0fb02017-02-28 15:15:56 -050023#include <vlibmemory/api.h>
24#include <vnet/dpo/load_balance.h>
25#include <vnet/fib/ip4_fib.h>
Florin Corasa0b34a72017-03-07 01:20:52 -080026#include <vnet/tcp/tcp.h>
Dave Barach68b0fb02017-02-28 15:15:56 -050027
28session_manager_main_t session_manager_main;
Florin Coras04e53442017-07-16 17:12:15 -070029extern transport_proto_vft_t *tp_vfts;
Florin Coras3eb50622017-07-13 01:24:57 -040030
Florin Coras3cbc04b2017-10-02 00:18:51 -070031static void
32session_send_evt_to_thread (u64 session_handle, fifo_event_type_t evt_type,
33 u32 thread_index, void *fp, void *rpc_args)
34{
35 u32 tries = 0;
36 session_fifo_event_t evt = { {0}, };
37 unix_shared_memory_queue_t *q;
38
39 evt.event_type = evt_type;
40 if (evt_type == FIFO_EVENT_RPC)
41 {
42 evt.rpc_args.fp = fp;
43 evt.rpc_args.arg = rpc_args;
44 }
45 else
46 evt.session_handle = session_handle;
47
48 q = session_manager_get_vpp_event_queue (thread_index);
49 while (unix_shared_memory_queue_add (q, (u8 *) & evt, 1))
50 {
51 if (tries++ == 3)
52 {
53 SESSION_DBG ("failed to enqueue evt");
54 break;
55 }
56 }
57}
58
59void
60session_send_session_evt_to_thread (u64 session_handle,
61 fifo_event_type_t evt_type,
62 u32 thread_index)
63{
64 session_send_evt_to_thread (session_handle, evt_type, thread_index, 0, 0);
65}
66
67void
68session_send_rpc_evt_to_thread (u32 thread_index, void *fp, void *rpc_args)
69{
70 if (thread_index != vlib_get_thread_index ())
71 session_send_evt_to_thread (0, FIFO_EVENT_RPC, thread_index, fp,
72 rpc_args);
73 else
74 {
75 void (*fnp) (void *) = fp;
76 fnp (rpc_args);
77 }
78}
79
80stream_session_t *
81session_alloc (u32 thread_index)
Dave Barach68b0fb02017-02-28 15:15:56 -050082{
Florin Coras6cf30ad2017-04-04 23:08:23 -070083 session_manager_main_t *smm = &session_manager_main;
Florin Coras3cbc04b2017-10-02 00:18:51 -070084 stream_session_t *s;
85 u8 will_expand = 0;
86 pool_get_aligned_will_expand (smm->sessions[thread_index], will_expand,
87 CLIB_CACHE_LINE_BYTES);
88 /* If we have peekers, let them finish */
89 if (PREDICT_FALSE (will_expand))
90 {
91 clib_spinlock_lock_if_init (&smm->peekers_write_locks[thread_index]);
92 pool_get_aligned (session_manager_main.sessions[thread_index], s,
93 CLIB_CACHE_LINE_BYTES);
94 clib_spinlock_unlock_if_init (&smm->peekers_write_locks[thread_index]);
95 }
96 else
97 {
98 pool_get_aligned (session_manager_main.sessions[thread_index], s,
99 CLIB_CACHE_LINE_BYTES);
100 }
101 memset (s, 0, sizeof (*s));
102 s->session_index = s - session_manager_main.sessions[thread_index];
103 s->thread_index = thread_index;
104 return s;
105}
106
107static void
108session_free (stream_session_t * s)
109{
110 pool_put (session_manager_main.sessions[s->thread_index], s);
111 if (CLIB_DEBUG)
112 memset (s, 0xFA, sizeof (*s));
113}
114
115static int
116session_alloc_fifos (segment_manager_t * sm, stream_session_t * s)
117{
Dave Barach68b0fb02017-02-28 15:15:56 -0500118 svm_fifo_t *server_rx_fifo = 0, *server_tx_fifo = 0;
119 u32 fifo_segment_index;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700120 int rv;
Dave Barach68b0fb02017-02-28 15:15:56 -0500121
Florin Coras3cbc04b2017-10-02 00:18:51 -0700122 if ((rv = segment_manager_alloc_session_fifos (sm, &server_rx_fifo,
123 &server_tx_fifo,
124 &fifo_segment_index)))
125 return rv;
126 /* Initialize backpointers */
127 server_rx_fifo->master_session_index = s->session_index;
128 server_rx_fifo->master_thread_index = s->thread_index;
129
130 server_tx_fifo->master_session_index = s->session_index;
131 server_tx_fifo->master_thread_index = s->thread_index;
132
133 s->server_rx_fifo = server_rx_fifo;
134 s->server_tx_fifo = server_tx_fifo;
135 s->svm_segment_index = fifo_segment_index;
136 return 0;
137}
138
139static stream_session_t *
140session_alloc_for_connection (transport_connection_t * tc)
141{
142 stream_session_t *s;
143 u32 thread_index = tc->thread_index;
144
Dave Barach2c25a622017-06-26 11:35:07 -0400145 ASSERT (thread_index == vlib_get_thread_index ());
146
Florin Coras3cbc04b2017-10-02 00:18:51 -0700147 s = session_alloc (thread_index);
148 s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
Dave Barach68b0fb02017-02-28 15:15:56 -0500149 s->session_state = SESSION_STATE_CONNECTING;
Dave Barach68b0fb02017-02-28 15:15:56 -0500150 s->thread_index = thread_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500151
Florin Coras3cbc04b2017-10-02 00:18:51 -0700152 /* Attach transport to session and vice versa */
Dave Barach68b0fb02017-02-28 15:15:56 -0500153 s->connection_index = tc->c_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500154 tc->s_index = s->session_index;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700155 return s;
156}
157
158static int
159session_alloc_and_init (segment_manager_t * sm, transport_connection_t * tc,
160 u8 alloc_fifos, stream_session_t ** ret_s)
161{
162 stream_session_t *s;
163 int rv;
164
165 s = session_alloc_for_connection (tc);
166 if (alloc_fifos && (rv = session_alloc_fifos (sm, s)))
167 {
168 session_free (s);
169 return rv;
170 }
Dave Barach68b0fb02017-02-28 15:15:56 -0500171
172 /* Add to the main lookup table */
Florin Coras3cbc04b2017-10-02 00:18:51 -0700173 session_lookup_add_connection (tc, session_handle (s));
Dave Barach68b0fb02017-02-28 15:15:56 -0500174
175 *ret_s = s;
Dave Barach68b0fb02017-02-28 15:15:56 -0500176 return 0;
177}
178
Florin Coras1f152cd2017-08-18 19:28:03 -0700179/**
180 * Discards bytes from buffer chain
181 *
182 * It discards n_bytes_to_drop starting at first buffer after chain_b
183 */
184always_inline void
185session_enqueue_discard_chain_bytes (vlib_main_t * vm, vlib_buffer_t * b,
186 vlib_buffer_t ** chain_b,
187 u32 n_bytes_to_drop)
188{
189 vlib_buffer_t *next = *chain_b;
190 u32 to_drop = n_bytes_to_drop;
191 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
192 while (to_drop && (next->flags & VLIB_BUFFER_NEXT_PRESENT))
193 {
194 next = vlib_get_buffer (vm, next->next_buffer);
195 if (next->current_length > to_drop)
196 {
197 vlib_buffer_advance (next, to_drop);
198 to_drop = 0;
199 }
200 else
201 {
202 to_drop -= next->current_length;
203 next->current_length = 0;
204 }
205 }
206 *chain_b = next;
207
208 if (to_drop == 0)
209 b->total_length_not_including_first_buffer -= n_bytes_to_drop;
210}
211
212/**
213 * Enqueue buffer chain tail
214 */
Florin Corasf6d68ed2017-05-07 19:12:02 -0700215always_inline int
216session_enqueue_chain_tail (stream_session_t * s, vlib_buffer_t * b,
217 u32 offset, u8 is_in_order)
218{
219 vlib_buffer_t *chain_b;
Florin Coras1f152cd2017-08-18 19:28:03 -0700220 u32 chain_bi, len, diff;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700221 vlib_main_t *vm = vlib_get_main ();
Florin Corasb2215d62017-08-01 16:56:58 -0700222 u8 *data;
Florin Coras1f152cd2017-08-18 19:28:03 -0700223 u32 written = 0;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700224 int rv = 0;
225
Florin Coras1f152cd2017-08-18 19:28:03 -0700226 if (is_in_order && offset)
227 {
228 diff = offset - b->current_length;
229 if (diff > b->total_length_not_including_first_buffer)
230 return 0;
231 chain_b = b;
232 session_enqueue_discard_chain_bytes (vm, b, &chain_b, diff);
233 chain_bi = vlib_get_buffer_index (vm, chain_b);
234 }
235 else
236 chain_bi = b->next_buffer;
237
Florin Corasf6d68ed2017-05-07 19:12:02 -0700238 do
239 {
240 chain_b = vlib_get_buffer (vm, chain_bi);
241 data = vlib_buffer_get_current (chain_b);
242 len = chain_b->current_length;
Florin Coras1f152cd2017-08-18 19:28:03 -0700243 if (!len)
244 continue;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700245 if (is_in_order)
246 {
247 rv = svm_fifo_enqueue_nowait (s->server_rx_fifo, len, data);
Florin Coras1f152cd2017-08-18 19:28:03 -0700248 if (rv == len)
249 {
250 written += rv;
251 }
252 else if (rv < len)
Florin Corasf6d68ed2017-05-07 19:12:02 -0700253 {
254 return (rv > 0) ? (written + rv) : written;
255 }
Florin Coras1f152cd2017-08-18 19:28:03 -0700256 else if (rv > len)
257 {
258 written += rv;
259
260 /* written more than what was left in chain */
261 if (written > b->total_length_not_including_first_buffer)
262 return written;
263
264 /* drop the bytes that have already been delivered */
265 session_enqueue_discard_chain_bytes (vm, b, &chain_b, rv - len);
266 }
Florin Corasf6d68ed2017-05-07 19:12:02 -0700267 }
268 else
269 {
270 rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset, len,
271 data);
272 if (rv)
Florin Coras1f152cd2017-08-18 19:28:03 -0700273 {
274 clib_warning ("failed to enqueue multi-buffer seg");
275 return -1;
276 }
Florin Corasf6d68ed2017-05-07 19:12:02 -0700277 offset += len;
278 }
279 }
280 while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT)
281 ? chain_b->next_buffer : 0));
282
283 if (is_in_order)
284 return written;
285
286 return 0;
287}
288
Dave Barach68b0fb02017-02-28 15:15:56 -0500289/*
290 * Enqueue data for delivery to session peer. Does not notify peer of enqueue
291 * event but on request can queue notification events for later delivery by
292 * calling stream_server_flush_enqueue_events().
293 *
294 * @param tc Transport connection which is to be enqueued data
Florin Corasf6d68ed2017-05-07 19:12:02 -0700295 * @param b Buffer to be enqueued
296 * @param offset Offset at which to start enqueueing if out-of-order
Dave Barach68b0fb02017-02-28 15:15:56 -0500297 * @param queue_event Flag to indicate if peer is to be notified or if event
298 * is to be queued. The former is useful when more data is
299 * enqueued and only one event is to be generated.
Florin Corasf6d68ed2017-05-07 19:12:02 -0700300 * @param is_in_order Flag to indicate if data is in order
Dave Barach68b0fb02017-02-28 15:15:56 -0500301 * @return Number of bytes enqueued or a negative value if enqueueing failed.
302 */
303int
Florin Coras3cbc04b2017-10-02 00:18:51 -0700304session_enqueue_stream_connection (transport_connection_t * tc,
305 vlib_buffer_t * b, u32 offset,
306 u8 queue_event, u8 is_in_order)
Dave Barach68b0fb02017-02-28 15:15:56 -0500307{
308 stream_session_t *s;
Florin Coras1f152cd2017-08-18 19:28:03 -0700309 int enqueued = 0, rv, in_order_off;
Dave Barach68b0fb02017-02-28 15:15:56 -0500310
Florin Corascea194d2017-10-02 00:18:51 -0700311 s = session_get (tc->s_index, tc->thread_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500312
Florin Corasf6d68ed2017-05-07 19:12:02 -0700313 if (is_in_order)
314 {
Florin Coras1f152cd2017-08-18 19:28:03 -0700315 enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo,
316 b->current_length,
317 vlib_buffer_get_current (b));
318 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT)
319 && enqueued >= 0))
Florin Corasf6d68ed2017-05-07 19:12:02 -0700320 {
Florin Coras1f152cd2017-08-18 19:28:03 -0700321 in_order_off = enqueued > b->current_length ? enqueued : 0;
322 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
323 if (rv > 0)
324 enqueued += rv;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700325 }
326 }
327 else
328 {
329 rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset,
330 b->current_length,
331 vlib_buffer_get_current (b));
332 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv))
Florin Coras1f152cd2017-08-18 19:28:03 -0700333 session_enqueue_chain_tail (s, b, offset + b->current_length, 0);
334 /* if something was enqueued, report even this as success for ooo
335 * segment handling */
336 return rv;
Florin Corasf6d68ed2017-05-07 19:12:02 -0700337 }
Dave Barach68b0fb02017-02-28 15:15:56 -0500338
339 if (queue_event)
340 {
341 /* Queue RX event on this fifo. Eventually these will need to be flushed
342 * by calling stream_server_flush_enqueue_events () */
343 session_manager_main_t *smm = vnet_get_session_manager_main ();
344 u32 thread_index = s->thread_index;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700345 u32 enqueue_epoch = smm->current_enqueue_epoch[tc->proto][thread_index];
Dave Barach68b0fb02017-02-28 15:15:56 -0500346
Florin Coras3cbc04b2017-10-02 00:18:51 -0700347 if (s->enqueue_epoch != enqueue_epoch)
Dave Barach68b0fb02017-02-28 15:15:56 -0500348 {
Florin Coras3cbc04b2017-10-02 00:18:51 -0700349 s->enqueue_epoch = enqueue_epoch;
350 vec_add1 (smm->session_to_enqueue[tc->proto][thread_index],
Dave Barach68b0fb02017-02-28 15:15:56 -0500351 s - smm->sessions[thread_index]);
352 }
353 }
354
Chris Lukeb2bcad62017-09-18 08:51:22 -0400355 return enqueued;
Dave Barach68b0fb02017-02-28 15:15:56 -0500356}
357
Florin Coras3cbc04b2017-10-02 00:18:51 -0700358int
359session_enqueue_dgram_connection (stream_session_t * s, vlib_buffer_t * b,
360 u8 proto, u8 queue_event)
361{
362 int enqueued = 0, rv, in_order_off;
363
364 if (svm_fifo_max_enqueue (s->server_rx_fifo) < b->current_length)
365 return -1;
366 enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo, b->current_length,
367 vlib_buffer_get_current (b));
368 if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0))
369 {
370 in_order_off = enqueued > b->current_length ? enqueued : 0;
371 rv = session_enqueue_chain_tail (s, b, in_order_off, 1);
372 if (rv > 0)
373 enqueued += rv;
374 }
375 if (queue_event)
376 {
377 /* Queue RX event on this fifo. Eventually these will need to be flushed
378 * by calling stream_server_flush_enqueue_events () */
379 session_manager_main_t *smm = vnet_get_session_manager_main ();
380 u32 thread_index = s->thread_index;
381 u32 enqueue_epoch = smm->current_enqueue_epoch[proto][thread_index];
382
383 if (s->enqueue_epoch != enqueue_epoch)
384 {
385 s->enqueue_epoch = enqueue_epoch;
386 vec_add1 (smm->session_to_enqueue[proto][thread_index],
387 s - smm->sessions[thread_index]);
388 }
389 }
390 return enqueued;
391}
392
Dave Barach68b0fb02017-02-28 15:15:56 -0500393/** Check if we have space in rx fifo to push more bytes */
394u8
395stream_session_no_space (transport_connection_t * tc, u32 thread_index,
396 u16 data_len)
397{
Florin Corascea194d2017-10-02 00:18:51 -0700398 stream_session_t *s = session_get (tc->s_index, thread_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500399
400 if (PREDICT_FALSE (s->session_state != SESSION_STATE_READY))
401 return 1;
402
403 if (data_len > svm_fifo_max_enqueue (s->server_rx_fifo))
404 return 1;
405
406 return 0;
407}
408
409u32
Florin Coras93992a92017-05-24 18:03:56 -0700410stream_session_tx_fifo_max_dequeue (transport_connection_t * tc)
411{
Florin Corascea194d2017-10-02 00:18:51 -0700412 stream_session_t *s = session_get (tc->s_index, tc->thread_index);
Florin Corasb2215d62017-08-01 16:56:58 -0700413 if (!s->server_tx_fifo)
Florin Coras93992a92017-05-24 18:03:56 -0700414 return 0;
415 return svm_fifo_max_dequeue (s->server_tx_fifo);
416}
417
418int
Dave Barach68b0fb02017-02-28 15:15:56 -0500419stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer,
420 u32 offset, u32 max_bytes)
421{
Florin Corascea194d2017-10-02 00:18:51 -0700422 stream_session_t *s = session_get (tc->s_index, tc->thread_index);
Florin Corasa5464812017-04-19 13:00:05 -0700423 return svm_fifo_peek (s->server_tx_fifo, offset, max_bytes, buffer);
Dave Barach68b0fb02017-02-28 15:15:56 -0500424}
425
426u32
427stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes)
428{
Florin Corascea194d2017-10-02 00:18:51 -0700429 stream_session_t *s = session_get (tc->s_index, tc->thread_index);
Florin Corasa5464812017-04-19 13:00:05 -0700430 return svm_fifo_dequeue_drop (s->server_tx_fifo, max_bytes);
Dave Barach68b0fb02017-02-28 15:15:56 -0500431}
432
433/**
434 * Notify session peer that new data has been enqueued.
435 *
436 * @param s Stream session for which the event is to be generated.
437 * @param block Flag to indicate if call should block if event queue is full.
438 *
439 * @return 0 on succes or negative number if failed to send notification.
440 */
441static int
Florin Coras3cbc04b2017-10-02 00:18:51 -0700442session_enqueue_notify (stream_session_t * s, u8 block)
Dave Barach68b0fb02017-02-28 15:15:56 -0500443{
444 application_t *app;
445 session_fifo_event_t evt;
446 unix_shared_memory_queue_t *q;
Dave Barach68b0fb02017-02-28 15:15:56 -0500447
448 if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED))
Florin Coras50958952017-08-29 14:50:13 -0700449 {
450 /* Session is closed so app will never clean up. Flush rx fifo */
451 u32 to_dequeue = svm_fifo_max_dequeue (s->server_rx_fifo);
452 if (to_dequeue)
453 svm_fifo_dequeue_drop (s->server_rx_fifo, to_dequeue);
454 return 0;
455 }
Dave Barach68b0fb02017-02-28 15:15:56 -0500456
457 /* Get session's server */
Dave Barach818eb542017-08-02 13:56:13 -0400458 app = application_get_if_valid (s->app_index);
459
460 if (PREDICT_FALSE (app == 0))
461 {
462 clib_warning ("invalid s->app_index = %d", s->app_index);
463 return 0;
464 }
Dave Barach68b0fb02017-02-28 15:15:56 -0500465
Florin Corasd79b41e2017-03-04 05:37:52 -0800466 /* Built-in server? Hand event to the callback... */
467 if (app->cb_fns.builtin_server_rx_callback)
Florin Coras6792ec02017-03-13 03:49:51 -0700468 return app->cb_fns.builtin_server_rx_callback (s);
Florin Corasd79b41e2017-03-04 05:37:52 -0800469
Florin Coras6792ec02017-03-13 03:49:51 -0700470 /* If no event, send one */
471 if (svm_fifo_set_event (s->server_rx_fifo))
472 {
473 /* Fabricate event */
474 evt.fifo = s->server_rx_fifo;
Florin Corasa5464812017-04-19 13:00:05 -0700475 evt.event_type = FIFO_EVENT_APP_RX;
Dave Barach68b0fb02017-02-28 15:15:56 -0500476
Florin Coras6792ec02017-03-13 03:49:51 -0700477 /* Add event to server's event queue */
478 q = app->event_queue;
479
480 /* Based on request block (or not) for lack of space */
481 if (block || PREDICT_TRUE (q->cursize < q->maxsize))
482 unix_shared_memory_queue_add (app->event_queue, (u8 *) & evt,
483 0 /* do wait for mutex */ );
484 else
485 {
486 clib_warning ("fifo full");
487 return -1;
488 }
489 }
Dave Barach68b0fb02017-02-28 15:15:56 -0500490
Florin Corase69f4952017-03-07 10:06:24 -0800491 /* *INDENT-OFF* */
Florin Coras6792ec02017-03-13 03:49:51 -0700492 SESSION_EVT_DBG(SESSION_EVT_ENQ, s, ({
Florin Corasec44e342017-10-16 20:47:56 -0700493 ed->data[0] = evt.event_type;
Florin Coras6792ec02017-03-13 03:49:51 -0700494 ed->data[1] = svm_fifo_max_dequeue (s->server_rx_fifo);
Florin Corase69f4952017-03-07 10:06:24 -0800495 }));
496 /* *INDENT-ON* */
Dave Barach68b0fb02017-02-28 15:15:56 -0500497
498 return 0;
499}
500
501/**
502 * Flushes queue of sessions that are to be notified of new data
503 * enqueued events.
504 *
505 * @param thread_index Thread index for which the flush is to be performed.
506 * @return 0 on success or a positive number indicating the number of
507 * failures due to API queue being full.
508 */
509int
Florin Coras3cbc04b2017-10-02 00:18:51 -0700510session_manager_flush_enqueue_events (u8 transport_proto, u32 thread_index)
Dave Barach68b0fb02017-02-28 15:15:56 -0500511{
512 session_manager_main_t *smm = &session_manager_main;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700513 u32 *indices;
514 stream_session_t *s;
Dave Barach68b0fb02017-02-28 15:15:56 -0500515 int i, errors = 0;
516
Florin Coras3cbc04b2017-10-02 00:18:51 -0700517 indices = smm->session_to_enqueue[transport_proto][thread_index];
Dave Barach68b0fb02017-02-28 15:15:56 -0500518
Florin Coras3cbc04b2017-10-02 00:18:51 -0700519 for (i = 0; i < vec_len (indices); i++)
Dave Barach68b0fb02017-02-28 15:15:56 -0500520 {
Florin Coras3cbc04b2017-10-02 00:18:51 -0700521 s = session_get_if_valid (indices[i], thread_index);
522 if (s == 0 || session_enqueue_notify (s, 0 /* don't block */ ))
523 errors++;
Dave Barach68b0fb02017-02-28 15:15:56 -0500524 }
525
Florin Coras3cbc04b2017-10-02 00:18:51 -0700526 vec_reset_length (indices);
527 smm->session_to_enqueue[transport_proto][thread_index] = indices;
528 smm->current_enqueue_epoch[transport_proto][thread_index]++;
Dave Barach68b0fb02017-02-28 15:15:56 -0500529
530 return errors;
531}
532
Florin Corasc28764f2017-04-26 00:08:42 -0700533/**
534 * Init fifo tail and head pointers
535 *
536 * Useful if transport uses absolute offsets for tracking ooo segments.
537 */
538void
539stream_session_init_fifos_pointers (transport_connection_t * tc,
540 u32 rx_pointer, u32 tx_pointer)
541{
542 stream_session_t *s;
Florin Corascea194d2017-10-02 00:18:51 -0700543 s = session_get (tc->s_index, tc->thread_index);
Florin Corasc28764f2017-04-26 00:08:42 -0700544 svm_fifo_init_pointers (s->server_rx_fifo, rx_pointer);
545 svm_fifo_init_pointers (s->server_tx_fifo, tx_pointer);
546}
547
Florin Corasf03a59a2017-06-09 21:07:32 -0700548int
Florin Coras3cbc04b2017-10-02 00:18:51 -0700549session_stream_connect_notify (transport_connection_t * tc, u8 is_fail)
Dave Barach68b0fb02017-02-28 15:15:56 -0500550{
Dave Barach68b0fb02017-02-28 15:15:56 -0500551 application_t *app;
552 stream_session_t *new_s = 0;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700553 u64 handle;
Florin Corasab0289a2017-08-14 11:25:25 -0700554 u32 opaque = 0;
Florin Corasf03a59a2017-06-09 21:07:32 -0700555 int error = 0;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700556 segment_manager_t *sm;
557 u8 alloc_fifos;
Dave Barach68b0fb02017-02-28 15:15:56 -0500558
Florin Coras3cbc04b2017-10-02 00:18:51 -0700559 /*
560 * Find connection handle and cleanup half-open table
561 */
Florin Corascea194d2017-10-02 00:18:51 -0700562 handle = session_lookup_half_open_handle (tc);
Florin Coras6cf30ad2017-04-04 23:08:23 -0700563 if (handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
Dave Barach68b0fb02017-02-28 15:15:56 -0500564 {
Florin Corascea194d2017-10-02 00:18:51 -0700565 SESSION_DBG ("half-open was removed!");
Florin Corasf03a59a2017-06-09 21:07:32 -0700566 return -1;
Dave Barach68b0fb02017-02-28 15:15:56 -0500567 }
Florin Corascea194d2017-10-02 00:18:51 -0700568 session_lookup_del_half_open (tc);
Florin Coras4eeeaaf2017-09-05 14:03:37 -0400569
Florin Corasab0289a2017-08-14 11:25:25 -0700570 /* Get the app's index from the handle we stored when opening connection
571 * and the opaque (api_context for external apps) from transport session
Florin Coras4eeeaaf2017-09-05 14:03:37 -0400572 * index */
Florin Corasc87c91d2017-08-16 19:55:49 -0700573 app = application_get_if_valid (handle >> 32);
574 if (!app)
575 return -1;
Florin Corasab0289a2017-08-14 11:25:25 -0700576 opaque = tc->s_index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500577
Florin Coras3cbc04b2017-10-02 00:18:51 -0700578 /*
579 * Allocate new session with fifos (svm segments are allocated if needed)
580 */
Dave Barach68b0fb02017-02-28 15:15:56 -0500581 if (!is_fail)
582 {
Florin Coras6cf30ad2017-04-04 23:08:23 -0700583 sm = application_get_connect_segment_manager (app);
Dave Barach52851e62017-08-07 09:35:25 -0400584 alloc_fifos = application_is_proxy (app);
Florin Coras3cbc04b2017-10-02 00:18:51 -0700585 if (session_alloc_and_init (sm, tc, alloc_fifos, &new_s))
Florin Corasf03a59a2017-06-09 21:07:32 -0700586 {
587 is_fail = 1;
588 error = -1;
589 }
590 else
591 new_s->app_index = app->index;
Dave Barach68b0fb02017-02-28 15:15:56 -0500592 }
593
Florin Coras3cbc04b2017-10-02 00:18:51 -0700594 /*
595 * Notify client application
596 */
Florin Corasab0289a2017-08-14 11:25:25 -0700597 if (app->cb_fns.session_connected_callback (app->index, opaque, new_s,
Florin Coras6534b7a2017-07-18 05:38:03 -0400598 is_fail))
599 {
Florin Corascea194d2017-10-02 00:18:51 -0700600 SESSION_DBG ("failed to notify app");
Florin Coras6534b7a2017-07-18 05:38:03 -0400601 if (!is_fail)
602 stream_session_disconnect (new_s);
603 }
604 else
605 {
606 if (!is_fail)
607 new_s->session_state = SESSION_STATE_READY;
608 }
Dave Barach68b0fb02017-02-28 15:15:56 -0500609
Florin Corasf03a59a2017-06-09 21:07:32 -0700610 return error;
Dave Barach68b0fb02017-02-28 15:15:56 -0500611}
612
Florin Coras3cbc04b2017-10-02 00:18:51 -0700613typedef struct _session_switch_pool_args
614{
615 u32 session_index;
616 u32 thread_index;
617 u32 new_thread_index;
618 u32 new_session_index;
619} session_switch_pool_args_t;
620
621static void
622session_switch_pool (void *cb_args)
623{
624 session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args;
625 stream_session_t *s;
626 ASSERT (args->thread_index == vlib_get_thread_index ());
627 s = session_get (args->session_index, args->thread_index);
628 s->server_tx_fifo->master_session_index = args->new_session_index;
629 s->server_tx_fifo->master_thread_index = args->new_thread_index;
630 tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index);
631 session_free (s);
632 clib_mem_free (cb_args);
633}
634
635/**
636 * Move dgram session to the right thread
637 */
638int
639session_dgram_connect_notify (transport_connection_t * tc,
640 u32 old_thread_index,
641 stream_session_t ** new_session)
642{
643 stream_session_t *new_s;
644 session_switch_pool_args_t *rpc_args;
645
646 /*
647 * Clone half-open session to the right thread.
648 */
649 new_s = session_clone_safe (tc->s_index, old_thread_index);
650 new_s->connection_index = tc->c_index;
651 new_s->server_rx_fifo->master_session_index = new_s->session_index;
652 new_s->server_rx_fifo->master_thread_index = new_s->thread_index;
653 new_s->session_state = SESSION_STATE_READY;
654 session_lookup_add_connection (tc, session_handle (new_s));
655
656 /*
657 * Ask thread owning the old session to clean it up and make us the tx
658 * fifo owner
659 */
660 rpc_args = clib_mem_alloc (sizeof (*rpc_args));
661 rpc_args->new_session_index = new_s->session_index;
662 rpc_args->new_thread_index = new_s->thread_index;
663 rpc_args->session_index = tc->s_index;
664 rpc_args->thread_index = old_thread_index;
665 session_send_rpc_evt_to_thread (rpc_args->thread_index, session_switch_pool,
666 rpc_args);
667
668 tc->s_index = new_s->session_index;
669 new_s->connection_index = tc->c_index;
670 *new_session = new_s;
671 return 0;
672}
673
Dave Barach68b0fb02017-02-28 15:15:56 -0500674void
675stream_session_accept_notify (transport_connection_t * tc)
676{
677 application_t *server;
678 stream_session_t *s;
679
Florin Corascea194d2017-10-02 00:18:51 -0700680 s = session_get (tc->s_index, tc->thread_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500681 server = application_get (s->app_index);
682 server->cb_fns.session_accept_callback (s);
683}
684
685/**
686 * Notification from transport that connection is being closed.
687 *
688 * A disconnect is sent to application but state is not removed. Once
689 * disconnect is acknowledged by application, session disconnect is called.
690 * Ultimately this leads to close being called on transport (passive close).
691 */
692void
693stream_session_disconnect_notify (transport_connection_t * tc)
694{
695 application_t *server;
696 stream_session_t *s;
697
Florin Corascea194d2017-10-02 00:18:51 -0700698 s = session_get (tc->s_index, tc->thread_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500699 server = application_get (s->app_index);
700 server->cb_fns.session_disconnect_callback (s);
701}
702
703/**
Florin Coras4eeeaaf2017-09-05 14:03:37 -0400704 * Cleans up session and lookup table.
Dave Barach68b0fb02017-02-28 15:15:56 -0500705 */
706void
707stream_session_delete (stream_session_t * s)
708{
Florin Coras6534b7a2017-07-18 05:38:03 -0400709 int rv;
Dave Barach68b0fb02017-02-28 15:15:56 -0500710
Florin Corasd79b41e2017-03-04 05:37:52 -0800711 /* Delete from the main lookup table. */
Florin Corascea194d2017-10-02 00:18:51 -0700712 if ((rv = session_lookup_del_session (s)))
Florin Coras6534b7a2017-07-18 05:38:03 -0400713 clib_warning ("hash delete error, rv %d", rv);
Dave Barach68b0fb02017-02-28 15:15:56 -0500714
715 /* Cleanup fifo segments */
Florin Coras6cf30ad2017-04-04 23:08:23 -0700716 segment_manager_dealloc_fifos (s->svm_segment_index, s->server_rx_fifo,
717 s->server_tx_fifo);
Florin Coras3cbc04b2017-10-02 00:18:51 -0700718 session_free (s);
Dave Barach68b0fb02017-02-28 15:15:56 -0500719}
720
721/**
722 * Notification from transport that connection is being deleted
723 *
Florin Coras4eeeaaf2017-09-05 14:03:37 -0400724 * This removes the session if it is still valid. It should be called only on
725 * previously fully established sessions. For instance failed connects should
726 * call stream_session_connect_notify and indicate that the connect has
727 * failed.
Dave Barach68b0fb02017-02-28 15:15:56 -0500728 */
729void
730stream_session_delete_notify (transport_connection_t * tc)
731{
732 stream_session_t *s;
733
Florin Corase04c2992017-03-01 08:17:34 -0800734 /* App might've been removed already */
Florin Coras3cbc04b2017-10-02 00:18:51 -0700735 s = session_get_if_valid (tc->s_index, tc->thread_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500736 if (!s)
Florin Corasc87c91d2017-08-16 19:55:49 -0700737 return;
Dave Barach68b0fb02017-02-28 15:15:56 -0500738 stream_session_delete (s);
739}
740
741/**
742 * Notify application that connection has been reset.
743 */
744void
745stream_session_reset_notify (transport_connection_t * tc)
746{
747 stream_session_t *s;
748 application_t *app;
Florin Corascea194d2017-10-02 00:18:51 -0700749 s = session_get (tc->s_index, tc->thread_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500750
751 app = application_get (s->app_index);
752 app->cb_fns.session_reset_callback (s);
753}
754
755/**
756 * Accept a stream session. Optionally ping the server by callback.
757 */
758int
759stream_session_accept (transport_connection_t * tc, u32 listener_index,
Florin Corascea194d2017-10-02 00:18:51 -0700760 u8 notify)
Dave Barach68b0fb02017-02-28 15:15:56 -0500761{
Dave Barach68b0fb02017-02-28 15:15:56 -0500762 application_t *server;
763 stream_session_t *s, *listener;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700764 segment_manager_t *sm;
Florin Corascea194d2017-10-02 00:18:51 -0700765 session_type_t sst;
Dave Barach68b0fb02017-02-28 15:15:56 -0500766 int rv;
767
Florin Coras3cbc04b2017-10-02 00:18:51 -0700768 sst = session_type_from_proto_and_ip (tc->proto, tc->is_ip4);
Florin Corascea194d2017-10-02 00:18:51 -0700769
Dave Barach68b0fb02017-02-28 15:15:56 -0500770 /* Find the server */
Florin Coras6cf30ad2017-04-04 23:08:23 -0700771 listener = listen_session_get (sst, listener_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500772 server = application_get (listener->app_index);
773
Florin Coras6cf30ad2017-04-04 23:08:23 -0700774 sm = application_get_listen_segment_manager (server, listener);
Florin Coras3cbc04b2017-10-02 00:18:51 -0700775 if ((rv = session_alloc_and_init (sm, tc, 1, &s)))
Dave Barach68b0fb02017-02-28 15:15:56 -0500776 return rv;
777
Florin Coras6cf30ad2017-04-04 23:08:23 -0700778 s->app_index = server->index;
779 s->listener_index = listener_index;
Dave Barach2c25a622017-06-26 11:35:07 -0400780 s->session_state = SESSION_STATE_ACCEPTING;
Dave Barach68b0fb02017-02-28 15:15:56 -0500781
782 /* Shoulder-tap the server */
783 if (notify)
784 {
785 server->cb_fns.session_accept_callback (s);
786 }
787
788 return 0;
789}
790
Florin Coras6cf30ad2017-04-04 23:08:23 -0700791/**
792 * Ask transport to open connection to remote transport endpoint.
793 *
794 * Stores handle for matching request with reply since the call can be
795 * asynchronous. For instance, for TCP the 3-way handshake must complete
796 * before reply comes. Session is only created once connection is established.
797 *
798 * @param app_index Index of the application requesting the connect
799 * @param st Session type requested.
800 * @param tep Remote transport endpoint
Florin Coras3cbc04b2017-10-02 00:18:51 -0700801 * @param opaque Opaque data (typically, api_context) the application expects
802 * on open completion.
Florin Coras6cf30ad2017-04-04 23:08:23 -0700803 */
Florin Corase04c2992017-03-01 08:17:34 -0800804int
Florin Coras3cbc04b2017-10-02 00:18:51 -0700805session_open (u32 app_index, session_endpoint_t * rmt, u32 opaque)
Dave Barach68b0fb02017-02-28 15:15:56 -0500806{
807 transport_connection_t *tc;
Florin Corascea194d2017-10-02 00:18:51 -0700808 session_type_t sst;
Florin Coras3cbc04b2017-10-02 00:18:51 -0700809 segment_manager_t *sm;
810 stream_session_t *s;
811 application_t *app;
Florin Corase04c2992017-03-01 08:17:34 -0800812 int rv;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700813 u64 handle;
Dave Barach68b0fb02017-02-28 15:15:56 -0500814
Florin Corascea194d2017-10-02 00:18:51 -0700815 sst = session_type_from_proto_and_ip (rmt->transport_proto, rmt->is_ip4);
816 rv = tp_vfts[sst].open (session_endpoint_to_transport (rmt));
Florin Corase04c2992017-03-01 08:17:34 -0800817 if (rv < 0)
818 {
Florin Coras3cbc04b2017-10-02 00:18:51 -0700819 SESSION_DBG ("Transport failed to open connection.");
Florin Corascea194d2017-10-02 00:18:51 -0700820 return VNET_API_ERROR_SESSION_CONNECT;
Florin Corase04c2992017-03-01 08:17:34 -0800821 }
822
Florin Corascea194d2017-10-02 00:18:51 -0700823 tc = tp_vfts[sst].get_half_open ((u32) rv);
Dave Barach68b0fb02017-02-28 15:15:56 -0500824
Florin Coras3cbc04b2017-10-02 00:18:51 -0700825 /* If transport offers a stream service, only allocate session once the
826 * connection has been established.
827 */
828 if (transport_is_stream (rmt->transport_proto))
829 {
830 /* Add connection to half-open table and save app and tc index. The
831 * latter is needed to help establish the connection while the former
832 * is needed when the connect notify comes and we have to notify the
833 * external app
834 */
835 handle = (((u64) app_index) << 32) | (u64) tc->c_index;
836 session_lookup_add_half_open (tc, handle);
Dave Barach68b0fb02017-02-28 15:15:56 -0500837
Florin Coras3cbc04b2017-10-02 00:18:51 -0700838 /* Store api_context (opaque) for when the reply comes. Not the nicest
839 * thing but better than allocating a separate half-open pool.
840 */
841 tc->s_index = opaque;
842 }
843 /* For dgram type of service, allocate session and fifos now.
844 */
845 else
846 {
847 app = application_get (app_index);
848 sm = application_get_connect_segment_manager (app);
Florin Corase04c2992017-03-01 08:17:34 -0800849
Florin Coras3cbc04b2017-10-02 00:18:51 -0700850 if (session_alloc_and_init (sm, tc, 1, &s))
851 return -1;
852 s->app_index = app->index;
853 s->session_state = SESSION_STATE_CONNECTING_READY;
Florin Coras6cf30ad2017-04-04 23:08:23 -0700854
Florin Coras3cbc04b2017-10-02 00:18:51 -0700855 /* Tell the app about the new event fifo for this session */
856 app->cb_fns.session_connected_callback (app->index, opaque, s, 0);
857 }
Florin Coras6cf30ad2017-04-04 23:08:23 -0700858 return 0;
859}
860
861/**
862 * Ask transport to listen on local transport endpoint.
863 *
864 * @param s Session for which listen will be called. Note that unlike
865 * established sessions, listen sessions are not associated to a
866 * thread.
867 * @param tep Local endpoint to be listened on.
868 */
869int
Florin Coras3cbc04b2017-10-02 00:18:51 -0700870stream_session_listen (stream_session_t * s, session_endpoint_t * sep)
Florin Coras6cf30ad2017-04-04 23:08:23 -0700871{
872 transport_connection_t *tc;
873 u32 tci;
874
875 /* Transport bind/listen */
Florin Corascea194d2017-10-02 00:18:51 -0700876 tci = tp_vfts[s->session_type].bind (s->session_index,
Florin Coras3cbc04b2017-10-02 00:18:51 -0700877 session_endpoint_to_transport (sep));
Florin Coras6cf30ad2017-04-04 23:08:23 -0700878
879 if (tci == (u32) ~ 0)
880 return -1;
881
882 /* Attach transport to session */
883 s->connection_index = tci;
884 tc = tp_vfts[s->session_type].get_listener (tci);
885
886 /* Weird but handle it ... */
887 if (tc == 0)
888 return -1;
889
890 /* Add to the main lookup table */
Florin Corascea194d2017-10-02 00:18:51 -0700891 session_lookup_add_connection (tc, s->session_index);
Florin Coras6cf30ad2017-04-04 23:08:23 -0700892 return 0;
893}
894
895/**
896 * Ask transport to stop listening on local transport endpoint.
897 *
898 * @param s Session to stop listening on. It must be in state LISTENING.
899 */
900int
901stream_session_stop_listen (stream_session_t * s)
902{
903 transport_connection_t *tc;
904
905 if (s->session_state != SESSION_STATE_LISTENING)
906 {
907 clib_warning ("not a listening session");
908 return -1;
909 }
910
911 tc = tp_vfts[s->session_type].get_listener (s->connection_index);
912 if (!tc)
913 {
914 clib_warning ("no transport");
915 return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
916 }
917
Florin Corascea194d2017-10-02 00:18:51 -0700918 session_lookup_del_connection (tc);
Florin Coras6cf30ad2017-04-04 23:08:23 -0700919 tp_vfts[s->session_type].unbind (s->connection_index);
Florin Corase04c2992017-03-01 08:17:34 -0800920 return 0;
Dave Barach68b0fb02017-02-28 15:15:56 -0500921}
922
923/**
924 * Disconnect session and propagate to transport. This should eventually
925 * result in a delete notification that allows us to cleanup session state.
926 * Called for both active/passive disconnects.
Florin Corasa5464812017-04-19 13:00:05 -0700927 *
928 * Should be called from the session's thread.
Dave Barach68b0fb02017-02-28 15:15:56 -0500929 */
930void
931stream_session_disconnect (stream_session_t * s)
932{
Dave Barach68b0fb02017-02-28 15:15:56 -0500933 s->session_state = SESSION_STATE_CLOSED;
Florin Corasd79b41e2017-03-04 05:37:52 -0800934 tp_vfts[s->session_type].close (s->connection_index, s->thread_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500935}
936
937/**
938 * Cleanup transport and session state.
Florin Corasd79b41e2017-03-04 05:37:52 -0800939 *
940 * Notify transport of the cleanup, wait for a delete notify to actually
941 * remove the session state.
Dave Barach68b0fb02017-02-28 15:15:56 -0500942 */
943void
944stream_session_cleanup (stream_session_t * s)
945{
Florin Corasd79b41e2017-03-04 05:37:52 -0800946 int rv;
947
948 s->session_state = SESSION_STATE_CLOSED;
949
950 /* Delete from the main lookup table to avoid more enqueues */
Florin Corascea194d2017-10-02 00:18:51 -0700951 rv = session_lookup_del_session (s);
Florin Corasd79b41e2017-03-04 05:37:52 -0800952 if (rv)
953 clib_warning ("hash delete error, rv %d", rv);
954
Dave Barach68b0fb02017-02-28 15:15:56 -0500955 tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index);
Dave Barach68b0fb02017-02-28 15:15:56 -0500956}
957
Florin Corasa5464812017-04-19 13:00:05 -0700958/**
959 * Allocate vpp event queue (once) per worker thread
960 */
961void
962session_vpp_event_queue_allocate (session_manager_main_t * smm,
963 u32 thread_index)
964{
965 api_main_t *am = &api_main;
966 void *oldheap;
Dave Barach10d8cc62017-05-30 09:30:07 -0400967 u32 event_queue_length = 2048;
Florin Corasa5464812017-04-19 13:00:05 -0700968
969 if (smm->vpp_event_queues[thread_index] == 0)
970 {
971 /* Allocate event fifo in the /vpe-api shared-memory segment */
972 oldheap = svm_push_data_heap (am->vlib_rp);
973
Dave Barach10d8cc62017-05-30 09:30:07 -0400974 if (smm->configured_event_queue_length)
975 event_queue_length = smm->configured_event_queue_length;
976
Florin Corasa5464812017-04-19 13:00:05 -0700977 smm->vpp_event_queues[thread_index] =
Dave Barach10d8cc62017-05-30 09:30:07 -0400978 unix_shared_memory_queue_init
979 (event_queue_length,
980 sizeof (session_fifo_event_t), 0 /* consumer pid */ ,
981 0 /* (do not) send signal when queue non-empty */ );
Florin Corasa5464812017-04-19 13:00:05 -0700982
983 svm_pop_heap (oldheap);
984 }
985}
986
Dave Barach2c25a622017-06-26 11:35:07 -0400987session_type_t
988session_type_from_proto_and_ip (transport_proto_t proto, u8 is_ip4)
989{
990 if (proto == TRANSPORT_PROTO_TCP)
991 {
992 if (is_ip4)
993 return SESSION_TYPE_IP4_TCP;
994 else
995 return SESSION_TYPE_IP6_TCP;
996 }
997 else
998 {
999 if (is_ip4)
1000 return SESSION_TYPE_IP4_UDP;
1001 else
1002 return SESSION_TYPE_IP6_UDP;
1003 }
1004
1005 return SESSION_N_TYPES;
1006}
1007
Florin Coras3cbc04b2017-10-02 00:18:51 -07001008transport_connection_t *
1009session_get_transport (stream_session_t * s)
1010{
1011 if (s->session_state >= SESSION_STATE_READY)
1012 return tp_vfts[s->session_type].get_connection (s->connection_index,
1013 s->thread_index);
1014 return 0;
1015}
1016
1017transport_connection_t *
1018listen_session_get_transport (stream_session_t * s)
1019{
1020 return tp_vfts[s->session_type].get_listener (s->connection_index);
1021}
1022
Florin Corascea194d2017-10-02 00:18:51 -07001023int
1024listen_session_get_local_session_endpoint (stream_session_t * listener,
1025 session_endpoint_t * sep)
1026{
1027 transport_connection_t *tc;
1028 tc =
1029 tp_vfts[listener->session_type].get_listener (listener->connection_index);
1030 if (!tc)
1031 {
1032 clib_warning ("no transport");
1033 return -1;
1034 }
1035
1036 /* N.B. The ip should not be copied because this is the local endpoint */
1037 sep->port = tc->lcl_port;
Florin Coras3cbc04b2017-10-02 00:18:51 -07001038 sep->transport_proto = tc->proto;
Florin Corascea194d2017-10-02 00:18:51 -07001039 sep->is_ip4 = tc->is_ip4;
1040 return 0;
1041}
1042
Dave Barach68b0fb02017-02-28 15:15:56 -05001043static clib_error_t *
Florin Corase04c2992017-03-01 08:17:34 -08001044session_manager_main_enable (vlib_main_t * vm)
Dave Barach68b0fb02017-02-28 15:15:56 -05001045{
Dave Barach68b0fb02017-02-28 15:15:56 -05001046 session_manager_main_t *smm = &session_manager_main;
Florin Corase04c2992017-03-01 08:17:34 -08001047 vlib_thread_main_t *vtm = vlib_get_thread_main ();
1048 u32 num_threads;
Florin Coras66b11312017-07-31 17:18:03 -07001049 u32 preallocated_sessions_per_worker;
Florin Coras3cbc04b2017-10-02 00:18:51 -07001050 int i, j;
Dave Barach68b0fb02017-02-28 15:15:56 -05001051
Dave Barach68b0fb02017-02-28 15:15:56 -05001052 num_threads = 1 /* main thread */ + vtm->n_threads;
1053
1054 if (num_threads < 1)
1055 return clib_error_return (0, "n_thread_stacks not set");
1056
1057 /* $$$ config parameters */
1058 svm_fifo_segment_init (0x200000000ULL /* first segment base VA */ ,
1059 20 /* timeout in seconds */ );
1060
1061 /* configure per-thread ** vectors */
1062 vec_validate (smm->sessions, num_threads - 1);
Dave Barach68b0fb02017-02-28 15:15:56 -05001063 vec_validate (smm->tx_buffers, num_threads - 1);
Dave Barachacd2a6a2017-05-16 17:41:34 -04001064 vec_validate (smm->pending_event_vector, num_threads - 1);
Florin Coras3cbc04b2017-10-02 00:18:51 -07001065 vec_validate (smm->pending_disconnects, num_threads - 1);
Dave Barachacd2a6a2017-05-16 17:41:34 -04001066 vec_validate (smm->free_event_vector, num_threads - 1);
Dave Barach68b0fb02017-02-28 15:15:56 -05001067 vec_validate (smm->vpp_event_queues, num_threads - 1);
Florin Coras3cbc04b2017-10-02 00:18:51 -07001068 vec_validate (smm->session_peekers, num_threads - 1);
1069 vec_validate (smm->peekers_readers_locks, num_threads - 1);
1070 vec_validate (smm->peekers_write_locks, num_threads - 1);
1071
1072 for (i = 0; i < TRANSPORT_N_PROTO; i++)
1073 for (j = 0; j < num_threads; j++)
1074 {
1075 vec_validate (smm->session_to_enqueue[i], num_threads - 1);
1076 vec_validate (smm->current_enqueue_epoch[i], num_threads - 1);
1077 }
Dave Barach68b0fb02017-02-28 15:15:56 -05001078
Dave Barachacd2a6a2017-05-16 17:41:34 -04001079 for (i = 0; i < num_threads; i++)
1080 {
1081 vec_validate (smm->free_event_vector[i], 0);
1082 _vec_len (smm->free_event_vector[i]) = 0;
1083 vec_validate (smm->pending_event_vector[i], 0);
1084 _vec_len (smm->pending_event_vector[i]) = 0;
Florin Coras3cbc04b2017-10-02 00:18:51 -07001085 vec_validate (smm->pending_disconnects[i], 0);
1086 _vec_len (smm->pending_disconnects[i]) = 0;
Dave Barachacd2a6a2017-05-16 17:41:34 -04001087 }
1088
Florin Coras3e350af2017-03-30 02:54:28 -07001089#if SESSION_DBG
1090 vec_validate (smm->last_event_poll_by_thread, num_threads - 1);
1091#endif
1092
Florin Coras6cf30ad2017-04-04 23:08:23 -07001093 /* Allocate vpp event queues */
1094 for (i = 0; i < vec_len (smm->vpp_event_queues); i++)
1095 session_vpp_event_queue_allocate (smm, i);
1096
Florin Coras66b11312017-07-31 17:18:03 -07001097 /* Preallocate sessions */
Dave Barachb7f1faa2017-08-29 11:43:37 -04001098 if (smm->preallocated_sessions)
Dave Barach68b0fb02017-02-28 15:15:56 -05001099 {
Dave Barachb7f1faa2017-08-29 11:43:37 -04001100 if (num_threads == 1)
Florin Coras66b11312017-07-31 17:18:03 -07001101 {
Dave Barachb7f1faa2017-08-29 11:43:37 -04001102 pool_init_fixed (smm->sessions[0], smm->preallocated_sessions);
Florin Coras66b11312017-07-31 17:18:03 -07001103 }
Dave Barachb7f1faa2017-08-29 11:43:37 -04001104 else
Florin Coras66b11312017-07-31 17:18:03 -07001105 {
Dave Barachb7f1faa2017-08-29 11:43:37 -04001106 int j;
1107 preallocated_sessions_per_worker =
1108 (1.1 * (f64) smm->preallocated_sessions /
1109 (f64) (num_threads - 1));
1110
1111 for (j = 1; j < num_threads; j++)
Florin Coras66b11312017-07-31 17:18:03 -07001112 {
Dave Barachb7f1faa2017-08-29 11:43:37 -04001113 pool_init_fixed (smm->sessions[j],
1114 preallocated_sessions_per_worker);
Florin Coras66b11312017-07-31 17:18:03 -07001115 }
Florin Coras66b11312017-07-31 17:18:03 -07001116 }
1117 }
Dave Barach68b0fb02017-02-28 15:15:56 -05001118
Florin Coras04e53442017-07-16 17:12:15 -07001119 session_lookup_init ();
Florin Corascea194d2017-10-02 00:18:51 -07001120 app_namespaces_init ();
Florin Coras3cbc04b2017-10-02 00:18:51 -07001121 transport_init ();
Dave Barach68b0fb02017-02-28 15:15:56 -05001122
Florin Corase04c2992017-03-01 08:17:34 -08001123 smm->is_enabled = 1;
1124
Florin Corasa0b34a72017-03-07 01:20:52 -08001125 /* Enable TCP transport */
1126 vnet_tcp_enable_disable (vm, 1);
1127
Dave Barach68b0fb02017-02-28 15:15:56 -05001128 return 0;
1129}
1130
Florin Corasa5464812017-04-19 13:00:05 -07001131void
1132session_node_enable_disable (u8 is_en)
1133{
1134 u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
1135 /* *INDENT-OFF* */
1136 foreach_vlib_main (({
1137 vlib_node_set_state (this_vlib_main, session_queue_node.index,
1138 state);
1139 }));
1140 /* *INDENT-ON* */
1141}
1142
Florin Corase04c2992017-03-01 08:17:34 -08001143clib_error_t *
1144vnet_session_enable_disable (vlib_main_t * vm, u8 is_en)
1145{
Florin Corascea194d2017-10-02 00:18:51 -07001146 clib_error_t *error = 0;
Florin Corase04c2992017-03-01 08:17:34 -08001147 if (is_en)
1148 {
1149 if (session_manager_main.is_enabled)
1150 return 0;
Dave Barach68b0fb02017-02-28 15:15:56 -05001151
Florin Corasa5464812017-04-19 13:00:05 -07001152 session_node_enable_disable (is_en);
Florin Corascea194d2017-10-02 00:18:51 -07001153 error = session_manager_main_enable (vm);
Florin Corase04c2992017-03-01 08:17:34 -08001154 }
1155 else
1156 {
1157 session_manager_main.is_enabled = 0;
Florin Corasa5464812017-04-19 13:00:05 -07001158 session_node_enable_disable (is_en);
Florin Corase04c2992017-03-01 08:17:34 -08001159 }
1160
Florin Corascea194d2017-10-02 00:18:51 -07001161 return error;
Florin Corase04c2992017-03-01 08:17:34 -08001162}
1163
Florin Corase04c2992017-03-01 08:17:34 -08001164clib_error_t *
1165session_manager_main_init (vlib_main_t * vm)
1166{
1167 session_manager_main_t *smm = &session_manager_main;
Florin Corase04c2992017-03-01 08:17:34 -08001168 smm->is_enabled = 0;
Florin Corase04c2992017-03-01 08:17:34 -08001169 return 0;
1170}
1171
Dave Barach2c25a622017-06-26 11:35:07 -04001172VLIB_INIT_FUNCTION (session_manager_main_init);
1173
1174static clib_error_t *
1175session_config_fn (vlib_main_t * vm, unformat_input_t * input)
Dave Barach10d8cc62017-05-30 09:30:07 -04001176{
1177 session_manager_main_t *smm = &session_manager_main;
1178 u32 nitems;
Florin Coras66b11312017-07-31 17:18:03 -07001179 uword tmp;
Dave Barach10d8cc62017-05-30 09:30:07 -04001180
1181 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1182 {
1183 if (unformat (input, "event-queue-length %d", &nitems))
1184 {
1185 if (nitems >= 2048)
1186 smm->configured_event_queue_length = nitems;
1187 else
1188 clib_warning ("event queue length %d too small, ignored", nitems);
1189 }
Florin Coras66b11312017-07-31 17:18:03 -07001190 else if (unformat (input, "preallocated-sessions %d",
1191 &smm->preallocated_sessions))
Dave Barach2c25a622017-06-26 11:35:07 -04001192 ;
Florin Coras66b11312017-07-31 17:18:03 -07001193 else if (unformat (input, "v4-session-table-buckets %d",
1194 &smm->configured_v4_session_table_buckets))
1195 ;
1196 else if (unformat (input, "v4-halfopen-table-buckets %d",
1197 &smm->configured_v4_halfopen_table_buckets))
1198 ;
1199 else if (unformat (input, "v6-session-table-buckets %d",
1200 &smm->configured_v6_session_table_buckets))
1201 ;
1202 else if (unformat (input, "v6-halfopen-table-buckets %d",
1203 &smm->configured_v6_halfopen_table_buckets))
1204 ;
1205 else if (unformat (input, "v4-session-table-memory %U",
1206 unformat_memory_size, &tmp))
1207 {
1208 if (tmp >= 0x100000000)
1209 return clib_error_return (0, "memory size %llx (%lld) too large",
1210 tmp, tmp);
1211 smm->configured_v4_session_table_memory = tmp;
1212 }
1213 else if (unformat (input, "v4-halfopen-table-memory %U",
1214 unformat_memory_size, &tmp))
1215 {
1216 if (tmp >= 0x100000000)
1217 return clib_error_return (0, "memory size %llx (%lld) too large",
1218 tmp, tmp);
1219 smm->configured_v4_halfopen_table_memory = tmp;
1220 }
1221 else if (unformat (input, "v6-session-table-memory %U",
1222 unformat_memory_size, &tmp))
1223 {
1224 if (tmp >= 0x100000000)
1225 return clib_error_return (0, "memory size %llx (%lld) too large",
1226 tmp, tmp);
1227 smm->configured_v6_session_table_memory = tmp;
1228 }
1229 else if (unformat (input, "v6-halfopen-table-memory %U",
1230 unformat_memory_size, &tmp))
1231 {
1232 if (tmp >= 0x100000000)
1233 return clib_error_return (0, "memory size %llx (%lld) too large",
1234 tmp, tmp);
1235 smm->configured_v6_halfopen_table_memory = tmp;
1236 }
Dave Barach10d8cc62017-05-30 09:30:07 -04001237 else
1238 return clib_error_return (0, "unknown input `%U'",
1239 format_unformat_error, input);
1240 }
1241 return 0;
1242}
1243
1244VLIB_CONFIG_FUNCTION (session_config_fn, "session");
1245
Dave Barach68b0fb02017-02-28 15:15:56 -05001246/*
1247 * fd.io coding-style-patch-verification: ON
1248 *
1249 * Local Variables:
1250 * eval: (c-set-style "gnu")
1251 * End:
1252 */