Line data Source code
1 : /*
2 : * Copyright (c) 2019 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 : #include <vnet/session/application_local.h>
17 : #include <vnet/session/session.h>
18 :
19 : typedef enum ct_segment_flags_
20 : {
21 : CT_SEGMENT_F_CLIENT_DETACHED = 1 << 0,
22 : CT_SEGMENT_F_SERVER_DETACHED = 1 << 1,
23 : } ct_segment_flags_t;
24 :
25 : typedef struct ct_segment_
26 : {
27 : u32 client_n_sessions;
28 : u32 server_n_sessions;
29 : u32 seg_ctx_index;
30 : u32 ct_seg_index;
31 : u32 segment_index;
32 : ct_segment_flags_t flags;
33 : } ct_segment_t;
34 :
35 : typedef struct ct_segments_
36 : {
37 : u32 sm_index;
38 : u32 server_wrk;
39 : u32 client_wrk;
40 : u32 fifo_pair_bytes;
41 : ct_segment_t *segments;
42 : } ct_segments_ctx_t;
43 :
44 : typedef struct ct_cleanup_req_
45 : {
46 : u32 ct_index;
47 : } ct_cleanup_req_t;
48 :
49 : typedef struct ct_worker_
50 : {
51 : ct_connection_t *connections; /**< Per-worker connection pools */
52 : u32 *pending_connects; /**< Fifo of pending ho indices */
53 : ct_cleanup_req_t *pending_cleanups; /**< Fifo of pending indices */
54 : u8 have_connects; /**< Set if connect rpc pending */
55 : u8 have_cleanups; /**< Set if cleanup rpc pending */
56 : clib_spinlock_t pending_connects_lock; /**< Lock for pending connects */
57 : u32 *new_connects; /**< Burst of connects to be done */
58 : } ct_worker_t;
59 :
60 : typedef struct ct_main_
61 : {
62 : ct_worker_t *wrk; /**< Per-worker state */
63 : u32 n_workers; /**< Number of vpp workers */
64 : u32 n_sessions; /**< Cumulative sessions counter */
65 : u32 *ho_reusable; /**< Vector of reusable ho indices */
66 : clib_spinlock_t ho_reuseable_lock; /**< Lock for reusable ho indices */
67 : clib_rwlock_t app_segs_lock; /**< RW lock for seg contexts */
68 : uword *app_segs_ctxs_table; /**< App handle to segment pool map */
69 : ct_segments_ctx_t *app_seg_ctxs; /**< Pool of ct segment contexts */
70 : u32 **fwrk_pending_connects; /**< First wrk pending half-opens */
71 : u32 fwrk_thread; /**< First worker thread */
72 : u8 fwrk_have_flush; /**< Flag for connect flush rpc */
73 : } ct_main_t;
74 :
75 : static ct_main_t ct_main;
76 :
77 : static inline ct_worker_t *
78 499797 : ct_worker_get (u32 thread_index)
79 : {
80 499797 : return &ct_main.wrk[thread_index];
81 : }
82 :
83 : static ct_connection_t *
84 57 : ct_connection_alloc (u32 thread_index)
85 : {
86 57 : ct_worker_t *wrk = ct_worker_get (thread_index);
87 : ct_connection_t *ct;
88 :
89 57 : pool_get_aligned_safe (wrk->connections, ct, CLIB_CACHE_LINE_BYTES);
90 57 : clib_memset (ct, 0, sizeof (*ct));
91 57 : ct->c_c_index = ct - wrk->connections;
92 57 : ct->c_thread_index = thread_index;
93 57 : ct->client_wrk = ~0;
94 57 : ct->server_wrk = ~0;
95 57 : ct->seg_ctx_index = ~0;
96 57 : ct->ct_seg_index = ~0;
97 57 : return ct;
98 : }
99 :
100 : static ct_connection_t *
101 499625 : ct_connection_get (u32 ct_index, u32 thread_index)
102 : {
103 499625 : ct_worker_t *wrk = ct_worker_get (thread_index);
104 :
105 499625 : if (pool_is_free_index (wrk->connections, ct_index))
106 31 : return 0;
107 499594 : return pool_elt_at_index (wrk->connections, ct_index);
108 : }
109 :
110 : static void
111 44 : ct_connection_free (ct_connection_t * ct)
112 : {
113 44 : ct_worker_t *wrk = ct_worker_get (ct->c_thread_index);
114 :
115 : if (CLIB_DEBUG)
116 : {
117 44 : clib_memset (ct, 0xfc, sizeof (*ct));
118 44 : pool_put (wrk->connections, ct);
119 44 : return;
120 : }
121 : pool_put (wrk->connections, ct);
122 : }
123 :
124 : static ct_connection_t *
125 13 : ct_half_open_alloc (void)
126 : {
127 13 : ct_main_t *cm = &ct_main;
128 : u32 *hip;
129 :
130 13 : clib_spinlock_lock (&cm->ho_reuseable_lock);
131 21 : vec_foreach (hip, cm->ho_reusable)
132 8 : pool_put_index (cm->wrk[cm->fwrk_thread].connections, *hip);
133 13 : vec_reset_length (cm->ho_reusable);
134 13 : clib_spinlock_unlock (&cm->ho_reuseable_lock);
135 :
136 13 : return ct_connection_alloc (cm->fwrk_thread);
137 : }
138 :
139 : static ct_connection_t *
140 26 : ct_half_open_get (u32 ho_index)
141 : {
142 26 : ct_main_t *cm = &ct_main;
143 26 : return ct_connection_get (ho_index, cm->fwrk_thread);
144 : }
145 :
146 : void
147 13 : ct_half_open_add_reusable (u32 ho_index)
148 : {
149 13 : ct_main_t *cm = &ct_main;
150 :
151 13 : clib_spinlock_lock (&cm->ho_reuseable_lock);
152 13 : vec_add1 (cm->ho_reusable, ho_index);
153 13 : clib_spinlock_unlock (&cm->ho_reuseable_lock);
154 13 : }
155 :
156 : session_t *
157 12 : ct_session_get_peer (session_t * s)
158 : {
159 : ct_connection_t *ct, *peer_ct;
160 12 : ct = ct_connection_get (s->connection_index, s->thread_index);
161 12 : peer_ct = ct_connection_get (ct->peer_index, s->thread_index);
162 12 : return session_get (peer_ct->c_s_index, s->thread_index);
163 : }
164 :
165 : void
166 18 : ct_session_endpoint (session_t * ll, session_endpoint_t * sep)
167 : {
168 : ct_connection_t *ct;
169 18 : ct = (ct_connection_t *) session_get_transport (ll);
170 18 : sep->transport_proto = ct->actual_tp;
171 18 : sep->port = ct->c_lcl_port;
172 18 : sep->is_ip4 = ct->c_is_ip4;
173 18 : ip_copy (&sep->ip, &ct->c_lcl_ip, ct->c_is_ip4);
174 18 : }
175 :
176 : static void
177 5 : ct_set_invalid_app_wrk (ct_connection_t *ct, u8 is_client)
178 : {
179 : ct_connection_t *peer_ct;
180 :
181 5 : peer_ct = ct_connection_get (ct->peer_index, ct->c_thread_index);
182 :
183 5 : if (is_client)
184 : {
185 4 : ct->client_wrk = APP_INVALID_INDEX;
186 4 : if (peer_ct)
187 0 : ct->client_wrk = APP_INVALID_INDEX;
188 : }
189 : else
190 : {
191 1 : ct->server_wrk = APP_INVALID_INDEX;
192 1 : if (peer_ct)
193 0 : ct->server_wrk = APP_INVALID_INDEX;
194 : }
195 5 : }
196 :
197 : static void
198 25 : ct_session_dealloc_fifos (ct_connection_t *ct, svm_fifo_t *rx_fifo,
199 : svm_fifo_t *tx_fifo)
200 : {
201 : ct_segments_ctx_t *seg_ctx;
202 25 : ct_main_t *cm = &ct_main;
203 : segment_manager_t *sm;
204 : app_worker_t *app_wrk;
205 : ct_segment_t *ct_seg;
206 : fifo_segment_t *fs;
207 : u32 seg_index;
208 : session_t *s;
209 : int cnt;
210 :
211 : /*
212 : * Cleanup fifos
213 : */
214 :
215 25 : sm = segment_manager_get (rx_fifo->segment_manager);
216 25 : seg_index = rx_fifo->segment_index;
217 :
218 25 : fs = segment_manager_get_segment_w_lock (sm, seg_index);
219 25 : fifo_segment_free_fifo (fs, rx_fifo);
220 25 : fifo_segment_free_fifo (fs, tx_fifo);
221 25 : segment_manager_segment_reader_unlock (sm);
222 :
223 : /*
224 : * Atomically update segment context with readers lock
225 : */
226 :
227 25 : clib_rwlock_reader_lock (&cm->app_segs_lock);
228 :
229 25 : seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, ct->seg_ctx_index);
230 25 : ct_seg = pool_elt_at_index (seg_ctx->segments, ct->ct_seg_index);
231 :
232 25 : if (ct->flags & CT_CONN_F_CLIENT)
233 : {
234 12 : cnt =
235 12 : __atomic_sub_fetch (&ct_seg->client_n_sessions, 1, __ATOMIC_RELAXED);
236 : }
237 : else
238 : {
239 13 : cnt =
240 13 : __atomic_sub_fetch (&ct_seg->server_n_sessions, 1, __ATOMIC_RELAXED);
241 : }
242 :
243 25 : clib_rwlock_reader_unlock (&cm->app_segs_lock);
244 :
245 : /*
246 : * No need to do any app updates, return
247 : */
248 25 : ASSERT (cnt >= 0);
249 25 : if (cnt)
250 8 : return;
251 :
252 : /*
253 : * Grab exclusive lock and update flags unless some other thread
254 : * added more sessions
255 : */
256 17 : clib_rwlock_writer_lock (&cm->app_segs_lock);
257 :
258 17 : seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, ct->seg_ctx_index);
259 17 : ct_seg = pool_elt_at_index (seg_ctx->segments, ct->ct_seg_index);
260 17 : if (ct->flags & CT_CONN_F_CLIENT)
261 : {
262 8 : cnt = ct_seg->client_n_sessions;
263 8 : if (cnt)
264 0 : goto done;
265 8 : ct_seg->flags |= CT_SEGMENT_F_CLIENT_DETACHED;
266 8 : s = session_get (ct->c_s_index, ct->c_thread_index);
267 8 : if (s->app_wrk_index == APP_INVALID_INDEX)
268 4 : ct_set_invalid_app_wrk (ct, 1 /* is_client */);
269 : }
270 : else
271 : {
272 9 : cnt = ct_seg->server_n_sessions;
273 9 : if (cnt)
274 0 : goto done;
275 9 : ct_seg->flags |= CT_SEGMENT_F_SERVER_DETACHED;
276 9 : s = session_get (ct->c_s_index, ct->c_thread_index);
277 9 : if (s->app_wrk_index == APP_INVALID_INDEX)
278 1 : ct_set_invalid_app_wrk (ct, 0 /* is_client */);
279 : }
280 :
281 17 : if (!(ct_seg->flags & CT_SEGMENT_F_CLIENT_DETACHED) ||
282 12 : !(ct_seg->flags & CT_SEGMENT_F_SERVER_DETACHED))
283 9 : goto done;
284 :
285 : /*
286 : * Remove segment context because both client and server detached
287 : */
288 :
289 8 : pool_put_index (seg_ctx->segments, ct->ct_seg_index);
290 :
291 : /*
292 : * No more segment indices left, remove the segments context
293 : */
294 8 : if (!pool_elts (seg_ctx->segments))
295 : {
296 8 : u64 table_handle = seg_ctx->client_wrk << 16 | seg_ctx->server_wrk;
297 8 : table_handle = (u64) seg_ctx->sm_index << 32 | table_handle;
298 8 : hash_unset (cm->app_segs_ctxs_table, table_handle);
299 8 : pool_free (seg_ctx->segments);
300 8 : pool_put_index (cm->app_seg_ctxs, ct->seg_ctx_index);
301 : }
302 :
303 : /*
304 : * Segment to be removed so notify both apps
305 : */
306 :
307 8 : app_wrk = app_worker_get_if_valid (ct->client_wrk);
308 : /* Determine if client app still needs notification, i.e., if it is
309 : * still attached. If client detached and this is the last ct session
310 : * on this segment, then its connects segment manager should also be
311 : * detached, so do not send notification */
312 8 : if (app_wrk)
313 : {
314 : segment_manager_t *csm;
315 4 : csm = app_worker_get_connect_segment_manager (app_wrk);
316 4 : if (!segment_manager_app_detached (csm))
317 4 : app_worker_del_segment_notify (app_wrk, ct->segment_handle);
318 : }
319 :
320 : /* Notify server app and free segment */
321 8 : segment_manager_lock_and_del_segment (sm, seg_index);
322 :
323 : /* Cleanup segment manager if needed. If server detaches there's a chance
324 : * the client's sessions will hold up segment removal */
325 8 : if (segment_manager_app_detached (sm) && !segment_manager_has_fifos (sm))
326 6 : segment_manager_free_safe (sm);
327 :
328 2 : done:
329 :
330 17 : clib_rwlock_writer_unlock (&cm->app_segs_lock);
331 : }
332 :
333 : static void
334 0 : ct_session_force_disconnect_server (ct_connection_t *sct)
335 : {
336 0 : sct->peer_index = ~0;
337 0 : session_transport_closing_notify (&sct->connection);
338 0 : }
339 :
340 : int
341 12 : ct_session_connect_notify (session_t *ss, session_error_t err)
342 : {
343 : u32 ss_index, opaque, thread_index;
344 : ct_connection_t *sct, *cct;
345 : app_worker_t *client_wrk;
346 : session_t *cs;
347 :
348 12 : ss_index = ss->session_index;
349 12 : thread_index = ss->thread_index;
350 12 : sct = (ct_connection_t *) session_get_transport (ss);
351 12 : client_wrk = app_worker_get (sct->client_wrk);
352 12 : opaque = sct->client_opaque;
353 :
354 12 : cct = ct_connection_get (sct->peer_index, thread_index);
355 :
356 : /* Client closed while waiting for reply from server */
357 12 : if (PREDICT_FALSE (!cct))
358 : {
359 0 : ct_session_force_disconnect_server (sct);
360 0 : return 0;
361 : }
362 :
363 12 : session_half_open_delete_notify (&cct->connection);
364 12 : cct->flags &= ~CT_CONN_F_HALF_OPEN;
365 :
366 12 : if (PREDICT_FALSE (err))
367 0 : goto connect_error;
368 :
369 : /*
370 : * Alloc client session, server session assumed to be established
371 : */
372 :
373 12 : ASSERT (ss->session_state >= SESSION_STATE_READY);
374 :
375 12 : cs = session_alloc (thread_index);
376 12 : ss = session_get (ss_index, thread_index);
377 12 : cs->session_type = ss->session_type;
378 12 : cs->listener_handle = SESSION_INVALID_HANDLE;
379 12 : session_set_state (cs, SESSION_STATE_CONNECTING);
380 12 : cs->app_wrk_index = client_wrk->wrk_index;
381 12 : cs->connection_index = cct->c_c_index;
382 12 : cct->c_s_index = cs->session_index;
383 :
384 : /* This will allocate fifos for the session. They won't be used for
385 : * exchanging data but they will be used to close the connection if
386 : * the segment manager/worker is freed */
387 12 : if ((err = app_worker_init_connected (client_wrk, cs)))
388 : {
389 0 : session_free (cs);
390 0 : ct_session_force_disconnect_server (sct);
391 0 : err = SESSION_E_ALLOC;
392 0 : goto connect_error;
393 : }
394 :
395 12 : session_set_state (cs, SESSION_STATE_CONNECTING);
396 :
397 12 : if (app_worker_connect_notify (client_wrk, cs, 0, opaque))
398 : {
399 0 : segment_manager_dealloc_fifos (cs->rx_fifo, cs->tx_fifo);
400 0 : session_free (cs);
401 0 : ct_session_force_disconnect_server (sct);
402 0 : goto cleanup_client;
403 : }
404 :
405 12 : cs = session_get (cct->c_s_index, cct->c_thread_index);
406 12 : session_set_state (cs, SESSION_STATE_READY);
407 :
408 12 : return 0;
409 :
410 0 : connect_error:
411 :
412 0 : app_worker_connect_notify (client_wrk, 0, err, cct->client_opaque);
413 :
414 0 : cleanup_client:
415 :
416 0 : if (cct->client_rx_fifo)
417 0 : ct_session_dealloc_fifos (cct, cct->client_rx_fifo, cct->client_tx_fifo);
418 0 : ct_connection_free (cct);
419 0 : return -1;
420 : }
421 :
422 : static inline ct_segment_t *
423 4 : ct_lookup_free_segment (ct_main_t *cm, segment_manager_t *sm,
424 : u32 seg_ctx_index)
425 : {
426 : uword free_bytes, max_free_bytes;
427 4 : ct_segment_t *ct_seg, *res = 0;
428 : ct_segments_ctx_t *seg_ctx;
429 : fifo_segment_t *fs;
430 : u32 max_fifos;
431 :
432 4 : seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, seg_ctx_index);
433 4 : max_free_bytes = seg_ctx->fifo_pair_bytes;
434 :
435 8 : pool_foreach (ct_seg, seg_ctx->segments)
436 : {
437 : /* Client or server has detached so segment cannot be used */
438 4 : fs = segment_manager_get_segment (sm, ct_seg->segment_index);
439 4 : free_bytes = fifo_segment_available_bytes (fs);
440 4 : max_fifos = fifo_segment_size (fs) / seg_ctx->fifo_pair_bytes;
441 4 : if (free_bytes > max_free_bytes &&
442 4 : fifo_segment_num_fifos (fs) / 2 < max_fifos)
443 : {
444 4 : max_free_bytes = free_bytes;
445 4 : res = ct_seg;
446 : }
447 : }
448 :
449 4 : return res;
450 : }
451 :
452 : static ct_segment_t *
453 9 : ct_alloc_segment (ct_main_t *cm, app_worker_t *server_wrk, u64 table_handle,
454 : segment_manager_t *sm, u32 client_wrk_index)
455 : {
456 9 : u32 seg_ctx_index = ~0, sm_index, pair_bytes;
457 : segment_manager_props_t *props;
458 9 : const u32 margin = 16 << 10;
459 : ct_segments_ctx_t *seg_ctx;
460 : app_worker_t *client_wrk;
461 : u64 seg_size, seg_handle;
462 : application_t *server;
463 : ct_segment_t *ct_seg;
464 : uword *spp;
465 : int fs_index;
466 :
467 9 : server = application_get (server_wrk->app_index);
468 9 : props = application_segment_manager_properties (server);
469 9 : sm_index = segment_manager_index (sm);
470 9 : pair_bytes = props->rx_fifo_size + props->tx_fifo_size + margin;
471 :
472 : /*
473 : * Make sure another thread did not alloc a segment while acquiring the lock
474 : */
475 :
476 9 : spp = hash_get (cm->app_segs_ctxs_table, table_handle);
477 9 : if (spp)
478 : {
479 0 : seg_ctx_index = *spp;
480 0 : ct_seg = ct_lookup_free_segment (cm, sm, seg_ctx_index);
481 0 : if (ct_seg)
482 0 : return ct_seg;
483 : }
484 :
485 : /*
486 : * No segment, try to alloc one and notify the server and the client.
487 : * Make sure the segment is not used for other fifos
488 : */
489 9 : seg_size = clib_max (props->segment_size, 128 << 20);
490 : fs_index =
491 9 : segment_manager_add_segment2 (sm, seg_size, FIFO_SEGMENT_F_CUSTOM_USE);
492 9 : if (fs_index < 0)
493 0 : return 0;
494 :
495 9 : if (seg_ctx_index == ~0)
496 : {
497 9 : pool_get_zero (cm->app_seg_ctxs, seg_ctx);
498 9 : seg_ctx_index = seg_ctx - cm->app_seg_ctxs;
499 9 : hash_set (cm->app_segs_ctxs_table, table_handle, seg_ctx_index);
500 9 : seg_ctx->server_wrk = server_wrk->wrk_index;
501 9 : seg_ctx->client_wrk = client_wrk_index;
502 9 : seg_ctx->sm_index = sm_index;
503 9 : seg_ctx->fifo_pair_bytes = pair_bytes;
504 : }
505 : else
506 : {
507 0 : seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, seg_ctx_index);
508 : }
509 :
510 9 : pool_get_zero (seg_ctx->segments, ct_seg);
511 9 : ct_seg->segment_index = fs_index;
512 9 : ct_seg->server_n_sessions = 0;
513 9 : ct_seg->client_n_sessions = 0;
514 9 : ct_seg->ct_seg_index = ct_seg - seg_ctx->segments;
515 9 : ct_seg->seg_ctx_index = seg_ctx_index;
516 :
517 : /* New segment, notify the server and client */
518 9 : seg_handle = segment_manager_make_segment_handle (sm_index, fs_index);
519 9 : if (app_worker_add_segment_notify (server_wrk, seg_handle))
520 0 : goto error;
521 :
522 9 : client_wrk = app_worker_get (client_wrk_index);
523 9 : if (app_worker_add_segment_notify (client_wrk, seg_handle))
524 : {
525 0 : app_worker_del_segment_notify (server_wrk, seg_handle);
526 0 : goto error;
527 : }
528 :
529 9 : return ct_seg;
530 :
531 0 : error:
532 :
533 0 : segment_manager_lock_and_del_segment (sm, fs_index);
534 0 : pool_put_index (seg_ctx->segments, ct_seg->seg_ctx_index);
535 0 : return 0;
536 : }
537 :
538 : static int
539 13 : ct_init_accepted_session (app_worker_t *server_wrk, ct_connection_t *ct,
540 : session_t *ls, session_t *ll)
541 : {
542 : segment_manager_props_t *props;
543 : u64 seg_handle, table_handle;
544 13 : u32 sm_index, fs_index = ~0;
545 : ct_segments_ctx_t *seg_ctx;
546 13 : ct_main_t *cm = &ct_main;
547 : application_t *server;
548 : segment_manager_t *sm;
549 : ct_segment_t *ct_seg;
550 : fifo_segment_t *fs;
551 : uword *spp;
552 : int rv;
553 :
554 13 : sm = app_worker_get_listen_segment_manager (server_wrk, ll);
555 13 : sm_index = segment_manager_index (sm);
556 13 : server = application_get (server_wrk->app_index);
557 13 : props = application_segment_manager_properties (server);
558 :
559 13 : table_handle = ct->client_wrk << 16 | server_wrk->wrk_index;
560 13 : table_handle = (u64) sm_index << 32 | table_handle;
561 :
562 : /*
563 : * Check if we already have a segment that can hold the fifos
564 : */
565 :
566 13 : clib_rwlock_reader_lock (&cm->app_segs_lock);
567 :
568 13 : spp = hash_get (cm->app_segs_ctxs_table, table_handle);
569 13 : if (spp)
570 : {
571 4 : ct_seg = ct_lookup_free_segment (cm, sm, *spp);
572 4 : if (ct_seg)
573 : {
574 4 : ct->seg_ctx_index = ct_seg->seg_ctx_index;
575 4 : ct->ct_seg_index = ct_seg->ct_seg_index;
576 4 : fs_index = ct_seg->segment_index;
577 4 : ct_seg->flags &=
578 : ~(CT_SEGMENT_F_SERVER_DETACHED | CT_SEGMENT_F_CLIENT_DETACHED);
579 4 : __atomic_add_fetch (&ct_seg->server_n_sessions, 1, __ATOMIC_RELAXED);
580 4 : __atomic_add_fetch (&ct_seg->client_n_sessions, 1, __ATOMIC_RELAXED);
581 : }
582 : }
583 :
584 13 : clib_rwlock_reader_unlock (&cm->app_segs_lock);
585 :
586 : /*
587 : * If not, grab exclusive lock and allocate segment
588 : */
589 13 : if (fs_index == ~0)
590 : {
591 9 : clib_rwlock_writer_lock (&cm->app_segs_lock);
592 :
593 : ct_seg =
594 9 : ct_alloc_segment (cm, server_wrk, table_handle, sm, ct->client_wrk);
595 9 : if (!ct_seg)
596 : {
597 0 : clib_rwlock_writer_unlock (&cm->app_segs_lock);
598 0 : return -1;
599 : }
600 :
601 9 : ct->seg_ctx_index = ct_seg->seg_ctx_index;
602 9 : ct->ct_seg_index = ct_seg->ct_seg_index;
603 9 : ct_seg->server_n_sessions += 1;
604 9 : ct_seg->client_n_sessions += 1;
605 9 : fs_index = ct_seg->segment_index;
606 :
607 9 : clib_rwlock_writer_unlock (&cm->app_segs_lock);
608 : }
609 :
610 : /*
611 : * Allocate and initialize the fifos
612 : */
613 13 : fs = segment_manager_get_segment_w_lock (sm, fs_index);
614 13 : rv = segment_manager_try_alloc_fifos (
615 13 : fs, ls->thread_index, props->rx_fifo_size, props->tx_fifo_size,
616 : &ls->rx_fifo, &ls->tx_fifo);
617 13 : if (rv)
618 : {
619 0 : segment_manager_segment_reader_unlock (sm);
620 :
621 0 : clib_rwlock_reader_lock (&cm->app_segs_lock);
622 :
623 0 : seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, ct->seg_ctx_index);
624 0 : ct_seg = pool_elt_at_index (seg_ctx->segments, ct->ct_seg_index);
625 0 : __atomic_sub_fetch (&ct_seg->server_n_sessions, 1, __ATOMIC_RELAXED);
626 0 : __atomic_sub_fetch (&ct_seg->client_n_sessions, 1, __ATOMIC_RELAXED);
627 :
628 0 : clib_rwlock_reader_unlock (&cm->app_segs_lock);
629 :
630 0 : return rv;
631 : }
632 :
633 13 : ls->rx_fifo->shr->master_session_index = ls->session_index;
634 13 : ls->tx_fifo->shr->master_session_index = ls->session_index;
635 13 : ls->rx_fifo->master_thread_index = ls->thread_index;
636 13 : ls->tx_fifo->master_thread_index = ls->thread_index;
637 :
638 13 : seg_handle = segment_manager_segment_handle (sm, fs);
639 13 : segment_manager_segment_reader_unlock (sm);
640 :
641 13 : ct->segment_handle = seg_handle;
642 :
643 13 : return 0;
644 : }
645 :
646 : static void
647 13 : ct_accept_one (u32 thread_index, u32 ho_index)
648 : {
649 : ct_connection_t *sct, *cct, *ho;
650 : transport_connection_t *ll_ct;
651 : app_worker_t *server_wrk;
652 : u32 cct_index, ll_index;
653 : session_t *ss, *ll;
654 :
655 : /*
656 : * Alloc client ct and initialize from ho
657 : */
658 13 : cct = ct_connection_alloc (thread_index);
659 13 : cct_index = cct->c_c_index;
660 :
661 13 : ho = ct_half_open_get (ho_index);
662 :
663 : /* Unlikely but half-open session and transport could have been freed */
664 13 : if (PREDICT_FALSE (!ho))
665 : {
666 0 : ct_connection_free (cct);
667 0 : return;
668 : }
669 :
670 13 : clib_memcpy (cct, ho, sizeof (*ho));
671 13 : cct->c_c_index = cct_index;
672 13 : cct->c_thread_index = thread_index;
673 13 : cct->flags |= CT_CONN_F_HALF_OPEN;
674 :
675 : /* Notify session layer that half-open is on a different thread
676 : * and mark ho connection index reusable. Avoids another rpc
677 : */
678 13 : session_half_open_migrate_notify (&cct->connection);
679 13 : session_half_open_migrated_notify (&cct->connection);
680 13 : ct_half_open_add_reusable (ho_index);
681 :
682 : /*
683 : * Alloc and init server transport
684 : */
685 :
686 13 : ll_index = cct->peer_index;
687 13 : ll = listen_session_get (ll_index);
688 13 : sct = ct_connection_alloc (thread_index);
689 : /* Transport not necessarily ct but it might, so grab after sct alloc */
690 13 : ll_ct = listen_session_get_transport (ll);
691 :
692 : /* Make sure cct is valid after sct alloc */
693 13 : cct = ct_connection_get (cct_index, thread_index);
694 :
695 13 : sct->c_rmt_port = 0;
696 13 : sct->c_lcl_port = ll_ct->lcl_port;
697 13 : sct->c_is_ip4 = cct->c_is_ip4;
698 13 : clib_memcpy (&sct->c_lcl_ip, &cct->c_rmt_ip, sizeof (cct->c_rmt_ip));
699 13 : sct->client_wrk = cct->client_wrk;
700 13 : sct->c_proto = TRANSPORT_PROTO_NONE;
701 13 : sct->client_opaque = cct->client_opaque;
702 13 : sct->actual_tp = cct->actual_tp;
703 :
704 13 : sct->peer_index = cct->c_c_index;
705 13 : cct->peer_index = sct->c_c_index;
706 :
707 : /*
708 : * Accept server session. Client session is created only after
709 : * server confirms accept.
710 : */
711 13 : ss = session_alloc (thread_index);
712 13 : ll = listen_session_get (ll_index);
713 26 : ss->session_type = session_type_from_proto_and_ip (TRANSPORT_PROTO_NONE,
714 13 : sct->c_is_ip4);
715 13 : ss->connection_index = sct->c_c_index;
716 13 : ss->listener_handle = listen_session_get_handle (ll);
717 13 : session_set_state (ss, SESSION_STATE_CREATED);
718 :
719 13 : server_wrk = application_listener_select_worker (ll);
720 13 : ss->app_wrk_index = server_wrk->wrk_index;
721 :
722 13 : sct->c_s_index = ss->session_index;
723 13 : sct->server_wrk = ss->app_wrk_index;
724 :
725 13 : if (ct_init_accepted_session (server_wrk, sct, ss, ll))
726 : {
727 0 : ct_session_connect_notify (ss, SESSION_E_ALLOC);
728 0 : ct_connection_free (sct);
729 0 : session_free (ss);
730 0 : return;
731 : }
732 :
733 13 : cct->server_wrk = sct->server_wrk;
734 13 : cct->seg_ctx_index = sct->seg_ctx_index;
735 13 : cct->ct_seg_index = sct->ct_seg_index;
736 13 : cct->client_rx_fifo = ss->tx_fifo;
737 13 : cct->client_tx_fifo = ss->rx_fifo;
738 13 : cct->client_rx_fifo->refcnt++;
739 13 : cct->client_tx_fifo->refcnt++;
740 13 : cct->segment_handle = sct->segment_handle;
741 :
742 13 : session_set_state (ss, SESSION_STATE_ACCEPTING);
743 13 : if (app_worker_accept_notify (server_wrk, ss))
744 : {
745 0 : ct_session_connect_notify (ss, SESSION_E_REFUSED);
746 0 : ct_session_dealloc_fifos (sct, ss->rx_fifo, ss->tx_fifo);
747 0 : ct_connection_free (sct);
748 0 : session_free (ss);
749 : }
750 : }
751 :
752 : static void
753 13 : ct_accept_rpc_wrk_handler (void *rpc_args)
754 : {
755 : u32 thread_index, n_connects, i, n_pending;
756 13 : const u32 max_connects = 32;
757 : ct_worker_t *wrk;
758 13 : u8 need_rpc = 0;
759 :
760 13 : thread_index = pointer_to_uword (rpc_args);
761 13 : wrk = ct_worker_get (thread_index);
762 :
763 : /* Connects could be handled without worker barrier so grab lock */
764 13 : clib_spinlock_lock (&wrk->pending_connects_lock);
765 :
766 13 : n_pending = clib_fifo_elts (wrk->pending_connects);
767 13 : n_connects = clib_min (n_pending, max_connects);
768 13 : vec_validate (wrk->new_connects, n_connects);
769 :
770 26 : for (i = 0; i < n_connects; i++)
771 13 : clib_fifo_sub1 (wrk->pending_connects, wrk->new_connects[i]);
772 :
773 13 : if (n_pending == n_connects)
774 13 : wrk->have_connects = 0;
775 : else
776 0 : need_rpc = 1;
777 :
778 13 : clib_spinlock_unlock (&wrk->pending_connects_lock);
779 :
780 26 : for (i = 0; i < n_connects; i++)
781 13 : ct_accept_one (thread_index, wrk->new_connects[i]);
782 :
783 13 : if (need_rpc)
784 0 : session_send_rpc_evt_to_thread_force (
785 : thread_index, ct_accept_rpc_wrk_handler,
786 0 : uword_to_pointer (thread_index, void *));
787 13 : }
788 :
789 : static void
790 13 : ct_fwrk_flush_connects (void *rpc_args)
791 : {
792 : u32 thread_index, fwrk_index, n_workers;
793 13 : ct_main_t *cm = &ct_main;
794 : ct_worker_t *wrk;
795 : u8 need_rpc;
796 :
797 13 : fwrk_index = cm->fwrk_thread;
798 13 : n_workers = vec_len (cm->fwrk_pending_connects);
799 :
800 26 : for (thread_index = fwrk_index; thread_index < n_workers; thread_index++)
801 : {
802 13 : if (!vec_len (cm->fwrk_pending_connects[thread_index]))
803 0 : continue;
804 :
805 13 : wrk = ct_worker_get (thread_index);
806 :
807 : /* Connects can be done without worker barrier, grab dst worker lock */
808 13 : if (thread_index != fwrk_index)
809 0 : clib_spinlock_lock (&wrk->pending_connects_lock);
810 :
811 13 : clib_fifo_add (wrk->pending_connects,
812 : cm->fwrk_pending_connects[thread_index],
813 : vec_len (cm->fwrk_pending_connects[thread_index]));
814 13 : if (!wrk->have_connects)
815 : {
816 13 : wrk->have_connects = 1;
817 13 : need_rpc = 1;
818 : }
819 :
820 13 : if (thread_index != fwrk_index)
821 0 : clib_spinlock_unlock (&wrk->pending_connects_lock);
822 :
823 13 : vec_reset_length (cm->fwrk_pending_connects[thread_index]);
824 :
825 13 : if (need_rpc)
826 13 : session_send_rpc_evt_to_thread_force (
827 : thread_index, ct_accept_rpc_wrk_handler,
828 13 : uword_to_pointer (thread_index, void *));
829 : }
830 :
831 13 : cm->fwrk_have_flush = 0;
832 13 : }
833 :
834 : static void
835 13 : ct_program_connect_to_wrk (u32 ho_index)
836 : {
837 13 : ct_main_t *cm = &ct_main;
838 : u32 thread_index;
839 :
840 : /* Simple round-robin policy for spreading sessions over workers. We skip
841 : * thread index 0, i.e., offset the index by 1, when we have workers as it
842 : * is the one dedicated to main thread. Note that n_workers does not include
843 : * main thread */
844 13 : cm->n_sessions += 1;
845 13 : thread_index = cm->n_workers ? (cm->n_sessions % cm->n_workers) + 1 : 0;
846 :
847 : /* Pospone flushing of connect request to dst worker until after session
848 : * layer fully initializes the half-open session. */
849 13 : vec_add1 (cm->fwrk_pending_connects[thread_index], ho_index);
850 13 : if (!cm->fwrk_have_flush)
851 : {
852 13 : session_send_rpc_evt_to_thread_force (
853 : cm->fwrk_thread, ct_fwrk_flush_connects,
854 13 : uword_to_pointer (thread_index, void *));
855 13 : cm->fwrk_have_flush = 1;
856 : }
857 13 : }
858 :
859 : static int
860 13 : ct_connect (app_worker_t *client_wrk, session_t *ll,
861 : session_endpoint_cfg_t *sep)
862 : {
863 : ct_connection_t *ho;
864 : u32 ho_index;
865 :
866 : /*
867 : * Alloc and init client half-open transport
868 : */
869 :
870 13 : ho = ct_half_open_alloc ();
871 13 : ho_index = ho->c_c_index;
872 13 : ho->c_rmt_port = sep->port;
873 13 : ho->c_lcl_port = 0;
874 13 : ho->c_is_ip4 = sep->is_ip4;
875 13 : ho->client_opaque = sep->opaque;
876 13 : ho->client_wrk = client_wrk->wrk_index;
877 13 : ho->peer_index = ll->session_index;
878 13 : ho->c_proto = TRANSPORT_PROTO_NONE;
879 13 : ho->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
880 13 : clib_memcpy (&ho->c_rmt_ip, &sep->ip, sizeof (sep->ip));
881 13 : ho->flags |= CT_CONN_F_CLIENT;
882 13 : ho->c_s_index = ~0;
883 13 : ho->actual_tp = sep->original_tp;
884 :
885 : /*
886 : * Program connect on a worker, connected reply comes
887 : * after server accepts the connection.
888 : */
889 13 : ct_program_connect_to_wrk (ho_index);
890 :
891 13 : return ho_index;
892 : }
893 :
894 : static u32
895 18 : ct_start_listen (u32 app_listener_index, transport_endpoint_cfg_t *tep)
896 : {
897 : session_endpoint_cfg_t *sep;
898 : ct_connection_t *ct;
899 :
900 18 : sep = (session_endpoint_cfg_t *) tep;
901 18 : ct = ct_connection_alloc (0);
902 18 : ct->server_wrk = sep->app_wrk_index;
903 18 : ct->c_is_ip4 = sep->is_ip4;
904 18 : clib_memcpy (&ct->c_lcl_ip, &sep->ip, sizeof (sep->ip));
905 18 : ct->c_lcl_port = sep->port;
906 18 : ct->c_s_index = app_listener_index;
907 18 : ct->actual_tp = sep->transport_proto;
908 18 : return ct->c_c_index;
909 : }
910 :
911 : static u32
912 18 : ct_stop_listen (u32 ct_index)
913 : {
914 : ct_connection_t *ct;
915 18 : ct = ct_connection_get (ct_index, 0);
916 18 : ct_connection_free (ct);
917 18 : return 0;
918 : }
919 :
920 : static transport_connection_t *
921 79 : ct_listener_get (u32 ct_index)
922 : {
923 79 : return (transport_connection_t *) ct_connection_get (ct_index, 0);
924 : }
925 :
926 : static transport_connection_t *
927 13 : ct_session_half_open_get (u32 ct_index)
928 : {
929 13 : return (transport_connection_t *) ct_half_open_get (ct_index);
930 : }
931 :
932 : static void
933 1 : ct_session_cleanup (u32 conn_index, u32 thread_index)
934 : {
935 : ct_connection_t *ct, *peer_ct;
936 :
937 1 : ct = ct_connection_get (conn_index, thread_index);
938 1 : if (!ct)
939 0 : return;
940 :
941 1 : peer_ct = ct_connection_get (ct->peer_index, thread_index);
942 1 : if (peer_ct)
943 1 : peer_ct->peer_index = ~0;
944 :
945 1 : ct_connection_free (ct);
946 : }
947 :
948 : static void
949 0 : ct_cleanup_ho (u32 ho_index)
950 : {
951 : ct_connection_t *ho;
952 :
953 0 : ho = ct_half_open_get (ho_index);
954 0 : ct_connection_free (ho);
955 0 : }
956 :
957 : static int
958 17 : ct_session_connect (transport_endpoint_cfg_t * tep)
959 : {
960 : session_endpoint_cfg_t *sep_ext;
961 17 : session_endpoint_t _sep, *sep = &_sep;
962 : app_worker_t *app_wrk;
963 : session_handle_t lh;
964 : application_t *app;
965 : app_listener_t *al;
966 : u32 table_index;
967 : session_t *ll;
968 : u8 fib_proto;
969 :
970 17 : sep_ext = (session_endpoint_cfg_t *) tep;
971 17 : _sep = *(session_endpoint_t *) tep;
972 17 : app_wrk = app_worker_get (sep_ext->app_wrk_index);
973 17 : app = application_get (app_wrk->app_index);
974 :
975 17 : sep->transport_proto = sep_ext->original_tp;
976 17 : table_index = application_local_session_table (app);
977 17 : lh = session_lookup_local_endpoint (table_index, sep);
978 17 : if (lh == SESSION_DROP_HANDLE)
979 3 : return SESSION_E_FILTERED;
980 :
981 14 : if (lh == SESSION_INVALID_HANDLE)
982 1 : goto global_scope;
983 :
984 13 : ll = listen_session_get_from_handle (lh);
985 13 : al = app_listener_get_w_session (ll);
986 :
987 : /*
988 : * Break loop if rule in local table points to connecting app. This
989 : * can happen if client is a generic proxy. Route connect through
990 : * global table instead.
991 : */
992 13 : if (al->app_index == app->app_index)
993 0 : goto global_scope;
994 :
995 13 : return ct_connect (app_wrk, ll, sep_ext);
996 :
997 : /*
998 : * If nothing found, check the global scope for locally attached
999 : * destinations. Make sure first that we're allowed to.
1000 : */
1001 :
1002 1 : global_scope:
1003 1 : if (session_endpoint_is_local (sep))
1004 1 : return SESSION_E_NOROUTE;
1005 :
1006 0 : if (!application_has_global_scope (app))
1007 0 : return SESSION_E_SCOPE;
1008 :
1009 0 : fib_proto = session_endpoint_fib_proto (sep);
1010 0 : table_index = session_lookup_get_index_for_fib (fib_proto, sep->fib_index);
1011 0 : ll = session_lookup_listener_wildcard (table_index, sep);
1012 :
1013 : /* Avoid connecting app to own listener */
1014 0 : if (ll && ll->app_index != app->app_index)
1015 0 : return ct_connect (app_wrk, ll, sep_ext);
1016 :
1017 : /* Failed to connect but no error */
1018 0 : return SESSION_E_LOCAL_CONNECT;
1019 : }
1020 :
1021 : static inline int
1022 12 : ct_close_is_reset (ct_connection_t *ct, session_t *s)
1023 : {
1024 12 : if (ct->flags & CT_CONN_F_CLIENT)
1025 6 : return (svm_fifo_max_dequeue (ct->client_rx_fifo) > 0);
1026 : else
1027 6 : return (svm_fifo_max_dequeue (s->rx_fifo) > 0);
1028 : }
1029 :
1030 : static void
1031 25 : ct_session_postponed_cleanup (ct_connection_t *ct)
1032 : {
1033 : ct_connection_t *peer_ct;
1034 : app_worker_t *app_wrk;
1035 : session_t *s;
1036 :
1037 25 : s = session_get (ct->c_s_index, ct->c_thread_index);
1038 25 : app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1039 :
1040 25 : peer_ct = ct_connection_get (ct->peer_index, ct->c_thread_index);
1041 25 : if (peer_ct)
1042 : {
1043 12 : if (ct_close_is_reset (ct, s))
1044 1 : session_transport_reset_notify (&peer_ct->connection);
1045 : else
1046 11 : session_transport_closing_notify (&peer_ct->connection);
1047 : }
1048 25 : session_transport_closed_notify (&ct->connection);
1049 :
1050 25 : if (ct->flags & CT_CONN_F_CLIENT)
1051 : {
1052 12 : if (app_wrk)
1053 8 : app_worker_cleanup_notify (app_wrk, s, SESSION_CLEANUP_TRANSPORT);
1054 :
1055 : /* Normal free for client session as the fifos are allocated through
1056 : * the connects segment manager in a segment that's not shared with
1057 : * the server */
1058 12 : ct_session_dealloc_fifos (ct, ct->client_rx_fifo, ct->client_tx_fifo);
1059 12 : session_free_w_fifos (s);
1060 : }
1061 : else
1062 : {
1063 : /* Manual session and fifo segment cleanup to avoid implicit
1064 : * segment manager cleanups and notifications */
1065 13 : app_wrk = app_worker_get_if_valid (s->app_wrk_index);
1066 13 : if (app_wrk)
1067 : {
1068 12 : app_worker_cleanup_notify (app_wrk, s, SESSION_CLEANUP_TRANSPORT);
1069 12 : app_worker_cleanup_notify (app_wrk, s, SESSION_CLEANUP_SESSION);
1070 : }
1071 :
1072 13 : ct_session_dealloc_fifos (ct, s->rx_fifo, s->tx_fifo);
1073 13 : session_free (s);
1074 : }
1075 :
1076 25 : ct_connection_free (ct);
1077 25 : }
1078 :
1079 : static void
1080 20 : ct_handle_cleanups (void *args)
1081 : {
1082 20 : uword thread_index = pointer_to_uword (args);
1083 20 : const u32 max_cleanups = 100;
1084 : ct_cleanup_req_t *req;
1085 : ct_connection_t *ct;
1086 20 : u32 n_to_handle = 0;
1087 : ct_worker_t *wrk;
1088 : session_t *s;
1089 :
1090 20 : wrk = ct_worker_get (thread_index);
1091 20 : wrk->have_cleanups = 0;
1092 20 : n_to_handle = clib_fifo_elts (wrk->pending_cleanups);
1093 20 : n_to_handle = clib_min (n_to_handle, max_cleanups);
1094 :
1095 45 : while (n_to_handle)
1096 : {
1097 25 : clib_fifo_sub2 (wrk->pending_cleanups, req);
1098 25 : ct = ct_connection_get (req->ct_index, thread_index);
1099 25 : s = session_get (ct->c_s_index, ct->c_thread_index);
1100 25 : if (!svm_fifo_has_event (s->tx_fifo))
1101 25 : ct_session_postponed_cleanup (ct);
1102 : else
1103 0 : clib_fifo_add1 (wrk->pending_cleanups, *req);
1104 25 : n_to_handle -= 1;
1105 : }
1106 :
1107 20 : if (clib_fifo_elts (wrk->pending_cleanups))
1108 : {
1109 0 : wrk->have_cleanups = 1;
1110 0 : session_send_rpc_evt_to_thread_force (
1111 : thread_index, ct_handle_cleanups,
1112 : uword_to_pointer (thread_index, void *));
1113 : }
1114 20 : }
1115 :
1116 : static void
1117 25 : ct_program_cleanup (ct_connection_t *ct)
1118 : {
1119 : ct_cleanup_req_t *req;
1120 : uword thread_index;
1121 : ct_worker_t *wrk;
1122 :
1123 25 : thread_index = ct->c_thread_index;
1124 25 : wrk = ct_worker_get (ct->c_thread_index);
1125 :
1126 25 : clib_fifo_add2 (wrk->pending_cleanups, req);
1127 25 : req->ct_index = ct->c_c_index;
1128 :
1129 25 : if (wrk->have_cleanups)
1130 5 : return;
1131 :
1132 20 : wrk->have_cleanups = 1;
1133 20 : session_send_rpc_evt_to_thread_force (
1134 : thread_index, ct_handle_cleanups, uword_to_pointer (thread_index, void *));
1135 : }
1136 :
1137 : static void
1138 25 : ct_session_close (u32 ct_index, u32 thread_index)
1139 : {
1140 : ct_connection_t *ct, *peer_ct;
1141 : session_t *s;
1142 :
1143 25 : ct = ct_connection_get (ct_index, thread_index);
1144 25 : s = session_get (ct->c_s_index, ct->c_thread_index);
1145 25 : peer_ct = ct_connection_get (ct->peer_index, thread_index);
1146 25 : if (peer_ct)
1147 : {
1148 12 : peer_ct->peer_index = ~0;
1149 : /* Make sure session was allocated */
1150 12 : if (peer_ct->flags & CT_CONN_F_HALF_OPEN)
1151 : {
1152 0 : ct_session_connect_notify (s, SESSION_E_REFUSED);
1153 0 : ct->peer_index = ~0;
1154 : }
1155 12 : else if (peer_ct->c_s_index == ~0)
1156 : {
1157 : /* should not happen */
1158 0 : clib_warning ("ct peer without session");
1159 0 : ct_connection_free (peer_ct);
1160 : }
1161 : }
1162 :
1163 : /* Do not send closed notify to make sure pending tx events are
1164 : * still delivered and program cleanup */
1165 25 : ct_program_cleanup (ct);
1166 25 : }
1167 :
1168 : static transport_connection_t *
1169 374580 : ct_session_get (u32 ct_index, u32 thread_index)
1170 : {
1171 374580 : return (transport_connection_t *) ct_connection_get (ct_index,
1172 : thread_index);
1173 : }
1174 :
1175 : static u8 *
1176 0 : format_ct_connection_id (u8 * s, va_list * args)
1177 : {
1178 0 : ct_connection_t *ct = va_arg (*args, ct_connection_t *);
1179 0 : if (!ct)
1180 0 : return s;
1181 0 : if (ct->c_is_ip4)
1182 : {
1183 0 : s = format (s, "[%d:%d][CT:%U] %U:%d->%U:%d", ct->c_thread_index,
1184 0 : ct->c_s_index, format_transport_proto_short, ct->actual_tp,
1185 : format_ip4_address, &ct->c_lcl_ip4,
1186 0 : clib_net_to_host_u16 (ct->c_lcl_port), format_ip4_address,
1187 0 : &ct->c_rmt_ip4, clib_net_to_host_u16 (ct->c_rmt_port));
1188 : }
1189 : else
1190 : {
1191 0 : s = format (s, "[%d:%d][CT:%U] %U:%d->%U:%d", ct->c_thread_index,
1192 0 : ct->c_s_index, format_transport_proto_short, ct->actual_tp,
1193 : format_ip6_address, &ct->c_lcl_ip6,
1194 0 : clib_net_to_host_u16 (ct->c_lcl_port), format_ip6_address,
1195 0 : &ct->c_rmt_ip6, clib_net_to_host_u16 (ct->c_rmt_port));
1196 : }
1197 :
1198 0 : return s;
1199 : }
1200 :
1201 : static int
1202 124753 : ct_custom_tx (void *session, transport_send_params_t * sp)
1203 : {
1204 124753 : session_t *s = (session_t *) session;
1205 124753 : if (session_has_transport (s))
1206 0 : return 0;
1207 : /* If event enqueued towards peer, remove from scheduler and remove
1208 : * session tx flag, i.e., accept new tx events. Unset fifo flag now to
1209 : * avoid missing events if peer did not clear fifo flag yet, which is
1210 : * interpreted as successful notification and session is descheduled. */
1211 124753 : svm_fifo_unset_event (s->tx_fifo);
1212 124753 : if (!ct_session_tx (s))
1213 124753 : sp->flags = TRANSPORT_SND_F_DESCHED;
1214 :
1215 : /* The scheduler uses packet count as a means of upper bounding the amount
1216 : * of work done per dispatch. So make it look like we have sent something */
1217 124753 : return 1;
1218 : }
1219 :
1220 : static int
1221 13 : ct_app_rx_evt (transport_connection_t * tc)
1222 : {
1223 13 : ct_connection_t *ct = (ct_connection_t *) tc, *peer_ct;
1224 : session_t *ps, *s;
1225 :
1226 13 : s = session_get (ct->c_s_index, ct->c_thread_index);
1227 13 : if (session_has_transport (s) || s->session_state < SESSION_STATE_READY)
1228 0 : return -1;
1229 13 : peer_ct = ct_connection_get (ct->peer_index, tc->thread_index);
1230 13 : if (!peer_ct || (peer_ct->flags & CT_CONN_F_HALF_OPEN))
1231 0 : return -1;
1232 13 : ps = session_get (peer_ct->c_s_index, peer_ct->c_thread_index);
1233 13 : if (ps->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
1234 0 : return -1;
1235 13 : return session_dequeue_notify (ps);
1236 : }
1237 :
1238 : static u8 *
1239 0 : format_ct_listener (u8 * s, va_list * args)
1240 : {
1241 0 : u32 tc_index = va_arg (*args, u32);
1242 0 : u32 __clib_unused thread_index = va_arg (*args, u32);
1243 0 : u32 __clib_unused verbose = va_arg (*args, u32);
1244 0 : ct_connection_t *ct = ct_connection_get (tc_index, 0);
1245 0 : s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct);
1246 0 : if (verbose)
1247 0 : s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "LISTEN");
1248 0 : return s;
1249 : }
1250 :
1251 : static u8 *
1252 0 : format_ct_half_open (u8 *s, va_list *args)
1253 : {
1254 0 : u32 ho_index = va_arg (*args, u32);
1255 0 : u32 verbose = va_arg (*args, u32);
1256 0 : ct_connection_t *ct = ct_half_open_get (ho_index);
1257 0 : s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct);
1258 0 : if (verbose)
1259 0 : s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "HALF-OPEN");
1260 0 : return s;
1261 : }
1262 :
1263 : static u8 *
1264 0 : format_ct_connection (u8 * s, va_list * args)
1265 : {
1266 0 : ct_connection_t *ct = va_arg (*args, ct_connection_t *);
1267 0 : u32 verbose = va_arg (*args, u32);
1268 :
1269 0 : if (!ct)
1270 0 : return s;
1271 0 : s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct);
1272 0 : if (verbose)
1273 : {
1274 0 : s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "ESTABLISHED");
1275 0 : if (verbose > 1)
1276 : {
1277 0 : s = format (s, "\n");
1278 : }
1279 : }
1280 0 : return s;
1281 : }
1282 :
1283 : static u8 *
1284 0 : format_ct_session (u8 * s, va_list * args)
1285 : {
1286 0 : u32 ct_index = va_arg (*args, u32);
1287 0 : u32 thread_index = va_arg (*args, u32);
1288 0 : u32 verbose = va_arg (*args, u32);
1289 : ct_connection_t *ct;
1290 :
1291 0 : ct = ct_connection_get (ct_index, thread_index);
1292 0 : if (!ct)
1293 : {
1294 0 : s = format (s, "empty\n");
1295 0 : return s;
1296 : }
1297 :
1298 0 : s = format (s, "%U", format_ct_connection, ct, verbose);
1299 0 : return s;
1300 : }
1301 :
1302 : clib_error_t *
1303 57 : ct_enable_disable (vlib_main_t * vm, u8 is_en)
1304 : {
1305 57 : vlib_thread_main_t *vtm = &vlib_thread_main;
1306 57 : ct_main_t *cm = &ct_main;
1307 : ct_worker_t *wrk;
1308 :
1309 57 : cm->n_workers = vlib_num_workers ();
1310 57 : cm->fwrk_thread = transport_cl_thread ();
1311 57 : vec_validate (cm->wrk, vtm->n_vlib_mains);
1312 192 : vec_foreach (wrk, cm->wrk)
1313 135 : clib_spinlock_init (&wrk->pending_connects_lock);
1314 57 : clib_spinlock_init (&cm->ho_reuseable_lock);
1315 57 : clib_rwlock_init (&cm->app_segs_lock);
1316 57 : vec_validate (cm->fwrk_pending_connects, cm->n_workers);
1317 57 : return 0;
1318 : }
1319 :
1320 : /* *INDENT-OFF* */
1321 : static const transport_proto_vft_t cut_thru_proto = {
1322 : .enable = ct_enable_disable,
1323 : .start_listen = ct_start_listen,
1324 : .stop_listen = ct_stop_listen,
1325 : .get_connection = ct_session_get,
1326 : .get_listener = ct_listener_get,
1327 : .get_half_open = ct_session_half_open_get,
1328 : .cleanup = ct_session_cleanup,
1329 : .cleanup_ho = ct_cleanup_ho,
1330 : .connect = ct_session_connect,
1331 : .close = ct_session_close,
1332 : .custom_tx = ct_custom_tx,
1333 : .app_rx_evt = ct_app_rx_evt,
1334 : .format_listener = format_ct_listener,
1335 : .format_half_open = format_ct_half_open,
1336 : .format_connection = format_ct_session,
1337 : .transport_options = {
1338 : .name = "ct",
1339 : .short_name = "C",
1340 : .tx_type = TRANSPORT_TX_INTERNAL,
1341 : .service_type = TRANSPORT_SERVICE_VC,
1342 : },
1343 : };
1344 : /* *INDENT-ON* */
1345 :
1346 : static inline int
1347 124753 : ct_session_can_tx (session_t *s)
1348 : {
1349 124755 : return (s->session_state == SESSION_STATE_READY ||
1350 124753 : s->session_state == SESSION_STATE_CLOSING ||
1351 0 : s->session_state == SESSION_STATE_APP_CLOSED);
1352 : }
1353 :
1354 : int
1355 124753 : ct_session_tx (session_t * s)
1356 : {
1357 : ct_connection_t *ct, *peer_ct;
1358 : session_t *peer_s;
1359 :
1360 124753 : if (!ct_session_can_tx (s))
1361 0 : return 0;
1362 124753 : ct = (ct_connection_t *) session_get_transport (s);
1363 124753 : peer_ct = ct_connection_get (ct->peer_index, ct->c_thread_index);
1364 124753 : if (!peer_ct)
1365 0 : return 0;
1366 124753 : peer_s = session_get (peer_ct->c_s_index, peer_ct->c_thread_index);
1367 124753 : if (peer_s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
1368 2 : return 0;
1369 124751 : return session_enqueue_notify (peer_s);
1370 : }
1371 :
1372 : static clib_error_t *
1373 559 : ct_transport_init (vlib_main_t * vm)
1374 : {
1375 559 : transport_register_protocol (TRANSPORT_PROTO_NONE, &cut_thru_proto,
1376 : FIB_PROTOCOL_IP4, ~0);
1377 559 : transport_register_protocol (TRANSPORT_PROTO_NONE, &cut_thru_proto,
1378 : FIB_PROTOCOL_IP6, ~0);
1379 559 : return 0;
1380 : }
1381 :
1382 77279 : VLIB_INIT_FUNCTION (ct_transport_init);
1383 :
1384 : /*
1385 : * fd.io coding-style-patch-verification: ON
1386 : *
1387 : * Local Variables:
1388 : * eval: (c-set-style "gnu")
1389 : * End:
1390 : */
|
