2 * Copyright (c) 2016-2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <netinet/in.h>
18 #include <vlib/vlib.h>
19 #include <vnet/vnet.h>
20 #include <vppinfra/error.h>
24 #include <vnet/ip/icmp46_packet.h>
26 #include <plugins/acl/fa_node.h>
27 #include <plugins/acl/acl.h>
28 #include <plugins/acl/lookup_context.h>
29 #include <plugins/acl/public_inlines.h>
30 #include <plugins/acl/session_inlines.h>
34 static_always_inline u8 *
35 format_ip46_session_bihash_kv (u8 * s, va_list * args, int is_ip6)
40 void *format_addr_func;
44 clib_bihash_kv_40_8_t *kv_40_8 =
45 va_arg (*args, clib_bihash_kv_40_8_t *);
46 a5t.kv_40_8 = *kv_40_8;
47 paddr0 = &a5t.ip6_addr[0];
48 paddr1 = &a5t.ip6_addr[1];
49 format_addr_func = format_ip6_address;
53 clib_bihash_kv_16_8_t *kv_16_8 =
54 va_arg (*args, clib_bihash_kv_16_8_t *);
55 a5t.kv_16_8 = *kv_16_8;
56 paddr0 = &a5t.ip4_addr[0];
57 paddr1 = &a5t.ip4_addr[1];
58 format_addr_func = format_ip4_address;
61 fa_full_session_id_t *sess = (fa_full_session_id_t *) & a5t.pkt;
63 return (format (s, "l3 %U -> %U %U | sess id %d thread id %d epoch %04x",
64 format_addr_func, paddr0,
65 format_addr_func, paddr1,
66 format_fa_session_l4_key, &a5t.l4,
67 sess->session_index, sess->thread_index,
68 sess->intf_policy_epoch));
72 format_ip6_session_bihash_kv (u8 * s, va_list * args)
74 return format_ip46_session_bihash_kv (s, args, 1);
78 format_ip4_session_bihash_kv (u8 * s, va_list * args)
80 return format_ip46_session_bihash_kv (s, args, 0);
85 acl_fa_verify_init_sessions (acl_main_t * am)
87 if (!am->fa_sessions_hash_is_initialized)
90 /* Allocate the per-worker sessions pools */
91 for (wk = 0; wk < vec_len (am->per_worker_data); wk++)
93 acl_fa_per_worker_data_t *pw = &am->per_worker_data[wk];
96 * // In lieu of trying to preallocate the pool and its free bitmap, rather use pool_init_fixed
97 * pool_alloc_aligned(pw->fa_sessions_pool, am->fa_conn_table_max_entries, CLIB_CACHE_LINE_BYTES);
98 * clib_bitmap_validate(pool_header(pw->fa_sessions_pool)->free_bitmap, am->fa_conn_table_max_entries);
100 pool_init_fixed (pw->fa_sessions_pool,
101 am->fa_conn_table_max_entries);
104 /* ... and the interface session hash table */
105 clib_bihash_init_40_8 (&am->fa_ip6_sessions_hash,
106 "ACL plugin FA IPv6 session bihash",
107 am->fa_conn_table_hash_num_buckets,
108 am->fa_conn_table_hash_memory_size);
109 clib_bihash_set_kvp_format_fn_40_8 (&am->fa_ip6_sessions_hash,
110 format_ip6_session_bihash_kv);
112 clib_bihash_init_16_8 (&am->fa_ip4_sessions_hash,
113 "ACL plugin FA IPv4 session bihash",
114 am->fa_conn_table_hash_num_buckets,
115 am->fa_conn_table_hash_memory_size);
116 clib_bihash_set_kvp_format_fn_16_8 (&am->fa_ip4_sessions_hash,
117 format_ip4_session_bihash_kv);
119 am->fa_sessions_hash_is_initialized = 1;
125 * Get the timeout of the session in a list since its enqueue time.
129 fa_session_get_list_timeout (acl_main_t * am, fa_session_t * sess)
131 u64 timeout = am->vlib_main->clib_time.clocks_per_second / 1000;
132 timeout = fa_session_get_timeout (am, sess);
133 /* for all user lists, check them twice per timeout */
134 timeout >>= (sess->link_list_id != ACL_TIMEOUT_PURGATORY);
139 acl_fa_get_list_head_expiry_time (acl_main_t * am,
140 acl_fa_per_worker_data_t * pw, u64 now,
141 u16 thread_index, int timeout_type)
143 return pw->fa_conn_list_head_expiry_time[timeout_type];
147 acl_fa_conn_time_to_check (acl_main_t * am, acl_fa_per_worker_data_t * pw,
148 u64 now, u16 thread_index, u32 session_index)
150 if (session_index == FA_SESSION_BOGUS_INDEX)
152 fa_session_t *sess = get_session_ptr (am, thread_index, session_index);
154 sess->link_enqueue_time + fa_session_get_list_timeout (am, sess);
155 return (timeout_time < now)
156 || (sess->link_enqueue_time <= pw->swipe_end_time);
160 * see if there are sessions ready to be checked,
161 * do the maintenance (requeue or delete), and
162 * return the total number of sessions reclaimed.
165 acl_fa_check_idle_sessions (acl_main_t * am, u16 thread_index, u64 now)
167 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
168 fa_full_session_id_t fsid;
169 fsid.thread_index = thread_index;
170 int total_expired = 0;
172 /* let the other threads enqueue more requests while we process, if they like */
173 aclp_swap_wip_and_pending_session_change_requests (am, thread_index);
176 vec_foreach (psr, pw->wip_session_change_requests)
178 acl_fa_sess_req_t op = *psr >> 32;
179 fsid.session_index = *psr & 0xffffffff;
182 case ACL_FA_REQ_SESS_RESCHEDULE:
183 acl_fa_restart_timer_for_session (am, now, fsid);
190 if (pw->wip_session_change_requests)
191 vec_set_len (pw->wip_session_change_requests, 0);
195 int n_pending_swipes = 0;
196 for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
199 while (n_expired < am->fa_max_deleted_sessions_per_interval)
201 fsid.session_index = pw->fa_conn_list_head[tt];
202 if (!acl_fa_conn_time_to_check
203 (am, pw, now, thread_index, pw->fa_conn_list_head[tt]))
207 if (am->trace_sessions > 3)
209 elog_acl_maybe_trace_X3 (am,
210 "acl_fa_check_idle_sessions: expire session %d in list %d on thread %d",
211 "i4i4i4", (u32) fsid.session_index,
212 (u32) tt, (u32) thread_index);
214 vec_add1 (pw->expired, fsid.session_index);
216 acl_fa_conn_list_delete_session (am, fsid, now);
219 for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
221 u32 session_index = pw->fa_conn_list_head[tt];
222 if (session_index == FA_SESSION_BOGUS_INDEX)
225 get_session_ptr (am, thread_index, session_index);
226 n_pending_swipes += sess->link_enqueue_time <= pw->swipe_end_time;
228 if (n_pending_swipes == 0)
230 pw->swipe_end_time = 0;
235 vec_foreach (psid, pw->expired)
237 fsid.session_index = *psid;
238 if (!pool_is_free_index (pw->fa_sessions_pool, fsid.session_index))
241 get_session_ptr (am, thread_index, fsid.session_index);
242 u32 sw_if_index = sess->sw_if_index;
243 u64 sess_timeout_time =
244 sess->last_active_time + fa_session_get_timeout (am, sess);
245 int timeout_passed = (now >= sess_timeout_time);
246 int clearing_interface =
247 clib_bitmap_get (pw->pending_clear_sw_if_index_bitmap, sw_if_index);
248 if (am->trace_sessions > 3)
250 elog_acl_maybe_trace_X2 (am,
251 "acl_fa_check_idle_sessions: now %lu sess_timeout_time %lu",
252 "i8i8", now, sess_timeout_time);
253 elog_acl_maybe_trace_X4 (am,
254 "acl_fa_check_idle_sessions: session %d sw_if_index %d timeout_passed %d clearing_interface %d",
255 "i4i4i4i4", (u32) fsid.session_index,
256 (u32) sess->sw_if_index,
257 (u32) timeout_passed,
258 (u32) clearing_interface);
260 if (timeout_passed || clearing_interface)
262 if (acl_fa_two_stage_delete_session (am, sw_if_index, fsid, now))
264 if (am->trace_sessions > 3)
266 elog_acl_maybe_trace_X2 (am,
267 "acl_fa_check_idle_sessions: deleted session %d sw_if_index %d",
268 "i4i4", (u32) fsid.session_index,
269 (u32) sess->sw_if_index);
271 /* the session has been put */
272 pw->cnt_deleted_sessions++;
276 /* the connection marked as deleted and put to purgatory */
277 if (am->trace_sessions > 3)
279 elog_acl_maybe_trace_X2 (am,
280 "acl_fa_check_idle_sessions: session %d sw_if_index %d marked as deleted, put to purgatory",
281 "i4i4", (u32) fsid.session_index,
282 (u32) sess->sw_if_index);
289 if (am->trace_sessions > 3)
291 elog_acl_maybe_trace_X2 (am,
292 "acl_fa_check_idle_sessions: restart timer for session %d sw_if_index %d",
293 "i4i4", (u32) fsid.session_index,
294 (u32) sess->sw_if_index);
296 /* There was activity on the session, so the idle timeout
297 has not passed. Enqueue for another time period. */
299 acl_fa_conn_list_add_session (am, fsid, now);
300 pw->cnt_session_timer_restarted++;
305 pw->cnt_already_deleted_sessions++;
308 total_expired = vec_len (pw->expired);
309 /* zero out the vector which we have acted on */
311 vec_set_len (pw->expired, 0);
312 /* if we were advancing and reached the end
313 * (no more sessions to recycle), reset the fast-forward timestamp */
315 if (pw->swipe_end_time && 0 == total_expired)
316 pw->swipe_end_time = 0;
318 elog_acl_maybe_trace_X1 (am,
319 "acl_fa_check_idle_sessions: done, total sessions expired: %d",
320 "i4", (u32) total_expired);
321 return (total_expired);
325 * This process ensures the connection cleanup happens every so often
326 * even in absence of traffic, as well as provides general orchestration
327 * for requests like connection deletion on a given sw_if_index.
331 #define foreach_acl_fa_cleaner_error \
332 _(UNKNOWN_EVENT, "unknown event received") \
337 #define _(sym,str) ACL_FA_CLEANER_ERROR_##sym,
338 foreach_acl_fa_cleaner_error
340 ACL_FA_CLEANER_N_ERROR,
341 } acl_fa_cleaner_error_t;
343 static char *acl_fa_cleaner_error_strings[] = {
344 #define _(sym,string) string,
345 foreach_acl_fa_cleaner_error
350 static vlib_node_registration_t acl_fa_session_cleaner_process_node;
351 static vlib_node_registration_t acl_fa_worker_session_cleaner_process_node;
354 send_one_worker_interrupt (vlib_main_t * vm, acl_main_t * am,
357 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
358 if (!pw->interrupt_is_pending)
360 pw->interrupt_is_pending = 1;
361 vlib_node_set_interrupt_pending (
362 vlib_get_main_by_index (thread_index),
363 acl_fa_worker_session_cleaner_process_node.index);
364 elog_acl_maybe_trace_X1 (am,
365 "send_one_worker_interrupt: send interrupt to worker %u",
366 "i4", ((u32) thread_index));
367 /* if the interrupt was requested, mark that done. */
368 /* pw->interrupt_is_needed = 0; */
369 CLIB_MEMORY_BARRIER ();
374 aclp_post_session_change_request (acl_main_t * am, u32 target_thread,
375 u32 target_session, u32 request_type)
377 acl_fa_per_worker_data_t *pw_me =
378 &am->per_worker_data[os_get_thread_index ()];
379 acl_fa_per_worker_data_t *pw = &am->per_worker_data[target_thread];
380 clib_spinlock_lock_if_init (&pw->pending_session_change_request_lock);
381 /* vec_add1 might cause a reallocation */
382 vec_add1 (pw->pending_session_change_requests,
383 (((u64) request_type) << 32) | target_session);
384 pw->rcvd_session_change_requests++;
385 pw_me->sent_session_change_requests++;
386 if (vec_len (pw->pending_session_change_requests) == 1)
388 /* ensure the requests get processed */
389 send_one_worker_interrupt (am->vlib_main, am, target_thread);
391 clib_spinlock_unlock_if_init (&pw->pending_session_change_request_lock);
395 aclp_swap_wip_and_pending_session_change_requests (acl_main_t * am,
398 acl_fa_per_worker_data_t *pw = &am->per_worker_data[target_thread];
400 clib_spinlock_lock_if_init (&pw->pending_session_change_request_lock);
401 tmp = pw->pending_session_change_requests;
402 pw->pending_session_change_requests = pw->wip_session_change_requests;
403 pw->wip_session_change_requests = tmp;
404 clib_spinlock_unlock_if_init (&pw->pending_session_change_request_lock);
409 purgatory_has_connections (vlib_main_t * vm, acl_main_t * am,
412 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
414 return (FA_SESSION_BOGUS_INDEX !=
415 pw->fa_conn_list_head[ACL_TIMEOUT_PURGATORY]);
421 * Per-worker thread interrupt-driven cleaner thread
422 * to clean idle connections if there are no packets
425 acl_fa_worker_conn_cleaner_process (vlib_main_t * vm,
426 vlib_node_runtime_t * rt,
429 acl_main_t *am = &acl_main;
430 u64 now = clib_cpu_time_now ();
431 u16 thread_index = os_get_thread_index ();
432 acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
434 elog_acl_maybe_trace_X1 (am,
435 "acl_fa_worker_conn_cleaner interrupt: now %lu",
437 /* allow another interrupt to be queued */
438 pw->interrupt_is_pending = 0;
439 if (pw->clear_in_process)
441 if (0 == pw->swipe_end_time)
444 * Someone has just set the flag to start clearing.
445 * we do this by combing through the connections up to a "time T"
446 * which is now, and requeueing everything except the expired
447 * connections and those matching the interface(s) being cleared.
451 * first filter the sw_if_index bitmap that they want from us, by
452 * a bitmap of sw_if_index for which we actually have connections.
454 if ((pw->pending_clear_sw_if_index_bitmap == 0)
455 || (pw->serviced_sw_if_index_bitmap == 0))
457 elog_acl_maybe_trace_X1 (am,
458 "acl_fa_worker_conn_cleaner: now %lu, someone tried to call clear but one of the bitmaps are empty",
460 clib_bitmap_zero (pw->pending_clear_sw_if_index_bitmap);
464 #ifdef FA_NODE_VERBOSE_DEBUG
466 ("WORKER-CLEAR: (before and) swiping sw-if-index bitmap: %U, my serviced bitmap %U",
467 format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap,
468 format_bitmap_hex, pw->serviced_sw_if_index_bitmap);
470 pw->pending_clear_sw_if_index_bitmap =
471 clib_bitmap_and (pw->pending_clear_sw_if_index_bitmap,
472 pw->serviced_sw_if_index_bitmap);
475 if (clib_bitmap_is_zero (pw->pending_clear_sw_if_index_bitmap))
477 /* if the cross-section is a zero vector, no need to do anything. */
478 elog_acl_maybe_trace_X1 (am,
479 "acl_fa_worker_conn_cleaner: now %lu, clearing done, nothing to do",
481 pw->clear_in_process = 0;
482 pw->swipe_end_time = 0;
486 #ifdef FA_NODE_VERBOSE_DEBUG
488 ("WORKER-CLEAR: swiping sw-if-index bitmap: %U, my serviced bitmap %U",
489 format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap,
490 format_bitmap_hex, pw->serviced_sw_if_index_bitmap);
492 elog_acl_maybe_trace_X1 (am,
493 "acl_fa_worker_conn_cleaner: swiping until %lu",
495 /* swipe through the connection lists until enqueue timestamps become above "now" */
496 pw->swipe_end_time = now;
500 num_expired = acl_fa_check_idle_sessions (am, thread_index, now);
501 // clib_warning("WORKER-CLEAR: checked %d sessions (clear_in_progress: %d)", num_expired, pw->clear_in_process);
502 elog_acl_maybe_trace_X2 (am,
503 "acl_fa_worker_conn_cleaner: checked %d sessions (clear_in_process: %d)",
504 "i4i4", (u32) num_expired,
505 (u32) pw->clear_in_process);
506 if (pw->clear_in_process)
508 if (pw->swipe_end_time == 0)
510 /* we were clearing but we could not process any more connections. time to stop. */
511 clib_bitmap_zero (pw->pending_clear_sw_if_index_bitmap);
512 pw->clear_in_process = 0;
513 elog_acl_maybe_trace_X1 (am,
514 "acl_fa_worker_conn_cleaner: now %lu, clearing done - all done",
519 elog_acl_maybe_trace_X1 (am,
520 "acl_fa_worker_conn_cleaner: now %lu, more work to do - requesting interrupt",
522 /* should continue clearing.. So could they please sent an interrupt again? */
523 send_one_worker_interrupt (vm, am, thread_index);
524 // pw->interrupt_is_needed = 1;
531 /* there was too much work, we should get an interrupt ASAP */
532 // pw->interrupt_is_needed = 1;
533 send_one_worker_interrupt (vm, am, thread_index);
534 pw->interrupt_is_unwanted = 0;
538 /* the current rate of interrupts is ok */
539 pw->interrupt_is_needed = 0;
540 pw->interrupt_is_unwanted = 0;
542 elog_acl_maybe_trace_X3 (am,
543 "acl_fa_worker_conn_cleaner: now %lu, interrupt needed: %u, interrupt unwanted: %u",
544 "i8i4i4", now, ((u32) pw->interrupt_is_needed),
545 ((u32) pw->interrupt_is_unwanted));
547 /* be persistent about quickly deleting the connections from the purgatory */
548 if (purgatory_has_connections (vm, am, thread_index))
550 send_one_worker_interrupt (vm, am, thread_index);
552 pw->interrupt_generation = am->fa_interrupt_generation;
557 send_interrupts_to_workers (vlib_main_t * vm, acl_main_t * am)
560 /* Can't use vec_len(am->per_worker_data) since the threads might not have come up yet; */
561 int n_threads = vlib_get_n_threads ();
562 for (i = 0; i < n_threads; i++)
564 send_one_worker_interrupt (vm, am, i);
568 /* centralized process to drive per-worker cleaners */
570 acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
573 acl_main_t *am = &acl_main;
575 f64 cpu_cps = vm->clib_time.clocks_per_second;
577 /* We should check if there are connections to clean up - at least twice a second */
578 u64 max_timer_wait_interval = cpu_cps / 2;
579 uword event_type, *event_data = 0;
580 acl_fa_per_worker_data_t *pw0;
582 am->fa_current_cleaner_timer_wait_interval = max_timer_wait_interval;
583 am->fa_cleaner_node_index = acl_fa_session_cleaner_process_node.index;
584 am->fa_interrupt_generation = 1;
587 now = clib_cpu_time_now ();
588 next_expire = now + am->fa_current_cleaner_timer_wait_interval;
589 int has_pending_conns = 0;
594 * walk over all per-thread list heads of different timeouts,
595 * and see if there are any connections pending.
596 * If there aren't - we do not need to wake up until the
597 * worker code signals that it has added a connection.
599 * Also, while we are at it, calculate the earliest we need to wake up.
601 for (ti = 0; ti < vlib_get_n_threads (); ti++)
603 if (ti >= vec_len (am->per_worker_data))
607 acl_fa_per_worker_data_t *pw = &am->per_worker_data[ti];
608 for (tt = 0; tt < vec_len (pw->fa_conn_list_head); tt++)
611 acl_fa_get_list_head_expiry_time (am, pw, now, ti, tt);
612 if ((head_expiry < next_expire) && !pw->interrupt_is_pending)
614 elog_acl_maybe_trace_X3 (am,
615 "acl_fa_session_cleaner_process: now %lu, worker: %u tt: %u",
616 "i8i2i2", now, ti, tt);
617 elog_acl_maybe_trace_X2 (am,
618 "acl_fa_session_cleaner_process: head expiry: %lu, is earlier than curr next expire: %lu",
619 "i8i8", head_expiry, next_expire);
620 next_expire = head_expiry;
622 if (FA_SESSION_BOGUS_INDEX != pw->fa_conn_list_head[tt])
624 has_pending_conns = 1;
629 /* If no pending connections and no ACL applied then no point in timing out */
630 if (!has_pending_conns && (0 == am->fa_total_enabled_count))
632 am->fa_cleaner_cnt_wait_without_timeout++;
633 elog_acl_maybe_trace_X1 (am,
634 "acl_conn_cleaner: now %lu entering wait without timeout",
636 (void) vlib_process_wait_for_event (vm);
637 event_type = vlib_process_get_events (vm, &event_data);
641 f64 timeout = ((i64) next_expire - (i64) now) / cpu_cps;
644 /* skip waiting altogether */
649 am->fa_cleaner_cnt_wait_with_timeout++;
650 elog_acl_maybe_trace_X2 (am,
651 "acl_conn_cleaner: now %lu entering wait with timeout %.6f sec",
652 "i8f8", now, timeout);
653 (void) vlib_process_wait_for_event_or_clock (vm, timeout);
654 event_type = vlib_process_get_events (vm, &event_data);
663 case ACL_FA_CLEANER_RESCHEDULE:
666 case ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX:
668 uword *clear_sw_if_index_bitmap = 0;
671 now = clib_cpu_time_now ();
672 elog_acl_maybe_trace_X1 (am,
673 "acl_fa_session_cleaner_process: now %lu, received ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX",
675 vec_foreach (sw_if_index0, event_data)
677 am->fa_cleaner_cnt_delete_by_sw_index++;
678 elog_acl_maybe_trace_X1 (am,
679 "acl_fa_session_cleaner_process: ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX %u",
680 "i4", *sw_if_index0);
681 if (*sw_if_index0 == ~0)
687 if (!pool_is_free_index
688 (am->vnet_main->interface_main.sw_interfaces,
691 clear_sw_if_index_bitmap =
692 clib_bitmap_set (clear_sw_if_index_bitmap,
698 ("ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX bitmap: %U, clear_all: %u",
699 format_bitmap_hex, clear_sw_if_index_bitmap, clear_all);
700 vec_foreach (pw0, am->per_worker_data)
702 CLIB_MEMORY_BARRIER ();
703 while (pw0->clear_in_process)
705 CLIB_MEMORY_BARRIER ();
706 elog_acl_maybe_trace_X1 (am,
707 "ACL_FA_NODE_CLEAN: waiting previous cleaning cycle to finish on %u",
709 (u32) (pw0 - am->per_worker_data));
710 vlib_process_suspend (vm, 0.0001);
711 if (pw0->interrupt_is_needed)
713 send_one_worker_interrupt (vm, am,
714 (pw0 - am->per_worker_data));
717 if (pw0->clear_in_process)
720 ("ERROR-BUG! Could not initiate cleaning on worker because another cleanup in progress");
724 clib_bitmap_free (pw0->pending_clear_sw_if_index_bitmap);
727 /* if we need to clear all, then just clear the interfaces that we are servicing */
728 pw0->pending_clear_sw_if_index_bitmap =
729 clib_bitmap_dup (pw0->serviced_sw_if_index_bitmap);
733 pw0->pending_clear_sw_if_index_bitmap =
734 clib_bitmap_dup (clear_sw_if_index_bitmap);
737 ("ACL_FA_CLEANER: thread %u, pending clear bitmap: %U",
738 (am->per_worker_data - pw0), format_bitmap_hex,
739 pw0->pending_clear_sw_if_index_bitmap);
740 pw0->clear_in_process = 1;
743 /* send some interrupts so they can start working */
744 send_interrupts_to_workers (vm, am);
746 /* now wait till they all complete */
747 acl_log_info ("CLEANER mains len: %u per-worker len: %d",
748 vlib_get_n_threads (),
749 vec_len (am->per_worker_data));
750 vec_foreach (pw0, am->per_worker_data)
752 CLIB_MEMORY_BARRIER ();
753 while (pw0->clear_in_process)
755 CLIB_MEMORY_BARRIER ();
756 elog_acl_maybe_trace_X1 (am,
757 "ACL_FA_NODE_CLEAN: waiting for my cleaning cycle to finish on %u",
759 (u32) (pw0 - am->per_worker_data));
760 vlib_process_suspend (vm, 0.0001);
761 if (pw0->interrupt_is_needed)
763 send_one_worker_interrupt (vm, am,
764 (pw0 - am->per_worker_data));
768 acl_log_info ("ACL_FA_NODE_CLEAN: cleaning done");
769 clib_bitmap_free (clear_sw_if_index_bitmap);
771 am->fa_cleaner_cnt_delete_by_sw_index_ok++;
774 #ifdef FA_NODE_VERBOSE_DEBUG
775 clib_warning ("ACL plugin connection cleaner: unknown event %u",
778 vlib_node_increment_counter (vm,
779 acl_fa_session_cleaner_process_node.
781 ACL_FA_CLEANER_ERROR_UNKNOWN_EVENT, 1);
782 am->fa_cleaner_cnt_unknown_event++;
786 send_interrupts_to_workers (vm, am);
789 vec_set_len (event_data, 0);
792 * If the interrupts were not processed yet, ensure we wait a bit,
795 int need_more_wait = 0;
796 int max_wait_cycles = 100;
800 vec_foreach (pw0, am->per_worker_data)
802 if (pw0->interrupt_generation != am->fa_interrupt_generation)
809 vlib_process_suspend (vm, 0.0001);
812 while (need_more_wait && (--max_wait_cycles > 0));
814 int interrupts_needed = 0;
815 int interrupts_unwanted = 0;
817 vec_foreach (pw0, am->per_worker_data)
819 if (pw0->interrupt_is_needed)
822 /* the per-worker value is reset when sending the interrupt */
824 if (pw0->interrupt_is_unwanted)
826 interrupts_unwanted++;
827 pw0->interrupt_is_unwanted = 0;
830 if (interrupts_needed)
832 /* they need more interrupts, do less waiting around next time */
833 am->fa_current_cleaner_timer_wait_interval /= 2;
834 /* never go into zero-wait either though - we need to give the space to others */
835 am->fa_current_cleaner_timer_wait_interval += 1;
837 else if (interrupts_unwanted)
839 /* slowly increase the amount of sleep up to a limit */
840 if (am->fa_current_cleaner_timer_wait_interval <
841 max_timer_wait_interval)
842 am->fa_current_cleaner_timer_wait_interval +=
843 cpu_cps * am->fa_cleaner_wait_time_increment;
845 am->fa_cleaner_cnt_event_cycles++;
846 am->fa_interrupt_generation++;
854 acl_fa_enable_disable (u32 sw_if_index, int is_input, int enable_disable)
856 acl_main_t *am = &acl_main;
859 acl_fa_verify_init_sessions (am);
860 am->fa_total_enabled_count++;
861 vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
862 ACL_FA_CLEANER_RESCHEDULE, 0);
866 am->fa_total_enabled_count--;
871 ASSERT (clib_bitmap_get (am->fa_in_acl_on_sw_if_index, sw_if_index) !=
873 vnet_feature_enable_disable ("ip4-unicast", "acl-plugin-in-ip4-fa",
874 sw_if_index, enable_disable, 0, 0);
875 vnet_feature_enable_disable ("ip6-unicast", "acl-plugin-in-ip6-fa",
876 sw_if_index, enable_disable, 0, 0);
877 am->fa_in_acl_on_sw_if_index =
878 clib_bitmap_set (am->fa_in_acl_on_sw_if_index, sw_if_index,
883 ASSERT (clib_bitmap_get (am->fa_out_acl_on_sw_if_index, sw_if_index) !=
885 vnet_feature_enable_disable ("ip4-output", "acl-plugin-out-ip4-fa",
886 sw_if_index, enable_disable, 0, 0);
887 vnet_feature_enable_disable ("ip6-output", "acl-plugin-out-ip6-fa",
888 sw_if_index, enable_disable, 0, 0);
889 am->fa_out_acl_on_sw_if_index =
890 clib_bitmap_set (am->fa_out_acl_on_sw_if_index, sw_if_index,
893 if ((!enable_disable) && (!acl_fa_ifc_has_in_acl (am, sw_if_index))
894 && (!acl_fa_ifc_has_out_acl (am, sw_if_index)))
896 #ifdef FA_NODE_VERBOSE_DEBUG
897 clib_warning ("ENABLE-DISABLE: clean the connections on interface %d",
900 vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
901 ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX,
907 show_fa_sessions_hash (vlib_main_t * vm, u32 verbose)
909 acl_main_t *am = &acl_main;
910 if (am->fa_sessions_hash_is_initialized)
912 vlib_cli_output (vm, "\nIPv6 Session lookup hash table:\n%U\n\n",
913 format_bihash_40_8, &am->fa_ip6_sessions_hash,
916 vlib_cli_output (vm, "\nIPv4 Session lookup hash table:\n%U\n\n",
917 format_bihash_16_8, &am->fa_ip4_sessions_hash,
923 "\nSession lookup hash table is not allocated.\n\n");
929 VLIB_REGISTER_NODE (acl_fa_worker_session_cleaner_process_node, static) = {
930 .function = acl_fa_worker_conn_cleaner_process,
931 .name = "acl-plugin-fa-worker-cleaner-process",
932 .type = VLIB_NODE_TYPE_INPUT,
933 .state = VLIB_NODE_STATE_INTERRUPT,
936 VLIB_REGISTER_NODE (acl_fa_session_cleaner_process_node, static) = {
937 .function = acl_fa_session_cleaner_process,
938 .type = VLIB_NODE_TYPE_PROCESS,
939 .name = "acl-plugin-fa-cleaner-process",
940 .n_errors = ARRAY_LEN (acl_fa_cleaner_error_strings),
941 .error_strings = acl_fa_cleaner_error_strings,
949 * fd.io coding-style-patch-verification: ON
952 * eval: (c-set-style "gnu")