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-rw-r--r--src/plugins/acl/sess_mgmt_node.c806
1 files changed, 806 insertions, 0 deletions
diff --git a/src/plugins/acl/sess_mgmt_node.c b/src/plugins/acl/sess_mgmt_node.c
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index 00000000000..b4faf554612
--- /dev/null
+++ b/src/plugins/acl/sess_mgmt_node.c
@@ -0,0 +1,806 @@
+/*
+ * Copyright (c) 2016-2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <stddef.h>
+#include <netinet/in.h>
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vppinfra/error.h>
+
+
+#include <acl/acl.h>
+#include <vnet/ip/icmp46_packet.h>
+
+#include <plugins/acl/fa_node.h>
+#include <plugins/acl/acl.h>
+#include <plugins/acl/lookup_context.h>
+#include <plugins/acl/public_inlines.h>
+#include <plugins/acl/session_inlines.h>
+
+// #include <vppinfra/bihash_40_8.h>
+
+
+static u64
+fa_session_get_shortest_timeout (acl_main_t * am)
+{
+ int timeout_type;
+ u64 timeout = ~0LL;
+ for (timeout_type = 0; timeout_type < ACL_N_TIMEOUTS; timeout_type++)
+ {
+ if (timeout > am->session_timeout_sec[timeout_type])
+ {
+ timeout = am->session_timeout_sec[timeout_type];
+ }
+ }
+ return timeout;
+}
+
+static void
+acl_fa_verify_init_sessions (acl_main_t * am)
+{
+ if (!am->fa_sessions_hash_is_initialized)
+ {
+ u16 wk;
+ /* Allocate the per-worker sessions pools */
+ for (wk = 0; wk < vec_len (am->per_worker_data); wk++)
+ {
+ acl_fa_per_worker_data_t *pw = &am->per_worker_data[wk];
+
+ /*
+ * // In lieu of trying to preallocate the pool and its free bitmap, rather use pool_init_fixed
+ * pool_alloc_aligned(pw->fa_sessions_pool, am->fa_conn_table_max_entries, CLIB_CACHE_LINE_BYTES);
+ * clib_bitmap_validate(pool_header(pw->fa_sessions_pool)->free_bitmap, am->fa_conn_table_max_entries);
+ */
+ pool_init_fixed (pw->fa_sessions_pool,
+ am->fa_conn_table_max_entries);
+ }
+
+ /* ... and the interface session hash table */
+ clib_bihash_init_40_8 (&am->fa_sessions_hash,
+ "ACL plugin FA session bihash",
+ am->fa_conn_table_hash_num_buckets,
+ am->fa_conn_table_hash_memory_size);
+ am->fa_sessions_hash_is_initialized = 1;
+ }
+}
+
+
+/*
+ * Get the timeout of the session in a list since its enqueue time.
+ */
+
+static u64
+fa_session_get_list_timeout (acl_main_t * am, fa_session_t * sess)
+{
+ u64 timeout = am->vlib_main->clib_time.clocks_per_second;
+ /*
+ * we have the shortest possible timeout type in all the lists
+ * (see README-multicore for the rationale)
+ */
+ timeout *= fa_session_get_shortest_timeout (am);
+ return timeout;
+}
+
+static u64
+acl_fa_get_list_head_expiry_time (acl_main_t * am,
+ acl_fa_per_worker_data_t * pw, u64 now,
+ u16 thread_index, int timeout_type)
+{
+ fa_session_t *sess =
+ get_session_ptr (am, thread_index, pw->fa_conn_list_head[timeout_type]);
+ /*
+ * We can not check just the index here because inbetween the worker thread might
+ * dequeue the connection from the head just as we are about to check it.
+ */
+ if (!is_valid_session_ptr (am, thread_index, sess))
+ {
+ return ~0LL; // infinity.
+ }
+ else
+ {
+ u64 timeout_time =
+ sess->link_enqueue_time + fa_session_get_list_timeout (am, sess);
+ return timeout_time;
+ }
+}
+
+static int
+acl_fa_conn_time_to_check (acl_main_t * am, acl_fa_per_worker_data_t * pw,
+ u64 now, u16 thread_index, u32 session_index)
+{
+ fa_session_t *sess = get_session_ptr (am, thread_index, session_index);
+ u64 timeout_time =
+ sess->link_enqueue_time + fa_session_get_list_timeout (am, sess);
+ return (timeout_time < now)
+ || (sess->link_enqueue_time <= pw->swipe_end_time);
+}
+
+/*
+ * see if there are sessions ready to be checked,
+ * do the maintenance (requeue or delete), and
+ * return the total number of sessions reclaimed.
+ */
+static int
+acl_fa_check_idle_sessions (acl_main_t * am, u16 thread_index, u64 now)
+{
+ acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
+ fa_full_session_id_t fsid;
+ fsid.thread_index = thread_index;
+ int total_expired = 0;
+
+ {
+ u8 tt = 0;
+ for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
+ {
+ while ((vec_len (pw->expired) <
+ am->fa_max_deleted_sessions_per_interval)
+ && (~0 != pw->fa_conn_list_head[tt])
+ &&
+ (acl_fa_conn_time_to_check
+ (am, pw, now, thread_index, pw->fa_conn_list_head[tt])))
+ {
+ fsid.session_index = pw->fa_conn_list_head[tt];
+ elog_acl_maybe_trace_X2 (am,
+ "acl_fa_check_idle_sessions: expire session %d on thread %d",
+ "i4i4", (u32) fsid.session_index,
+ (u32) thread_index);
+ vec_add1 (pw->expired, fsid.session_index);
+ acl_fa_conn_list_delete_session (am, fsid);
+ }
+ }
+ }
+
+ u32 *psid = NULL;
+ vec_foreach (psid, pw->expired)
+ {
+ fsid.session_index = *psid;
+ if (!pool_is_free_index (pw->fa_sessions_pool, fsid.session_index))
+ {
+ fa_session_t *sess =
+ get_session_ptr (am, thread_index, fsid.session_index);
+ u32 sw_if_index = sess->sw_if_index;
+ u64 sess_timeout_time =
+ sess->last_active_time + fa_session_get_timeout (am, sess);
+ if ((now < sess_timeout_time)
+ && (0 ==
+ clib_bitmap_get (pw->pending_clear_sw_if_index_bitmap,
+ sw_if_index)))
+ {
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning
+ ("ACL_FA_NODE_CLEAN: Restarting timer for session %d, sw_if_index %d",
+ (int) fsid.session_index, sess->sw_if_index);
+#endif
+ /* There was activity on the session, so the idle timeout
+ has not passed. Enqueue for another time period. */
+
+ acl_fa_conn_list_add_session (am, fsid, now);
+ pw->cnt_session_timer_restarted++;
+ }
+ else
+ {
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning
+ ("ACL_FA_NODE_CLEAN: Deleting session %d, sw_if_index %d",
+ (int) fsid.session_index, sess->sw_if_index);
+#endif
+ acl_fa_delete_session (am, sw_if_index, fsid);
+ pw->cnt_deleted_sessions++;
+ }
+ }
+ else
+ {
+ pw->cnt_already_deleted_sessions++;
+ }
+ }
+ total_expired = vec_len (pw->expired);
+ /* zero out the vector which we have acted on */
+ if (pw->expired)
+ _vec_len (pw->expired) = 0;
+ /* if we were advancing and reached the end
+ * (no more sessions to recycle), reset the fast-forward timestamp */
+
+ if (pw->swipe_end_time && 0 == total_expired)
+ pw->swipe_end_time = 0;
+ return (total_expired);
+}
+
+/*
+ * This process ensures the connection cleanup happens every so often
+ * even in absence of traffic, as well as provides general orchestration
+ * for requests like connection deletion on a given sw_if_index.
+ */
+
+
+/* *INDENT-OFF* */
+#define foreach_acl_fa_cleaner_error \
+_(UNKNOWN_EVENT, "unknown event received") \
+/* end of errors */
+
+typedef enum
+{
+#define _(sym,str) ACL_FA_CLEANER_ERROR_##sym,
+ foreach_acl_fa_cleaner_error
+#undef _
+ ACL_FA_CLEANER_N_ERROR,
+} acl_fa_cleaner_error_t;
+
+static char *acl_fa_cleaner_error_strings[] = {
+#define _(sym,string) string,
+ foreach_acl_fa_cleaner_error
+#undef _
+};
+
+/* *INDENT-ON* */
+
+static vlib_node_registration_t acl_fa_session_cleaner_process_node;
+static vlib_node_registration_t acl_fa_worker_session_cleaner_process_node;
+
+/*
+ * Per-worker thread interrupt-driven cleaner thread
+ * to clean idle connections if there are no packets
+ */
+static uword
+acl_fa_worker_conn_cleaner_process (vlib_main_t * vm,
+ vlib_node_runtime_t * rt,
+ vlib_frame_t * f)
+{
+ acl_main_t *am = &acl_main;
+ u64 now = clib_cpu_time_now ();
+ u16 thread_index = os_get_thread_index ();
+ acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
+ int num_expired;
+ elog_acl_maybe_trace_X1 (am,
+ "acl_fa_worker_conn_cleaner interrupt: now %lu",
+ "i8", now);
+ /* allow another interrupt to be queued */
+ pw->interrupt_is_pending = 0;
+ if (pw->clear_in_process)
+ {
+ if (0 == pw->swipe_end_time)
+ {
+ /*
+ * Someone has just set the flag to start clearing.
+ * we do this by combing through the connections up to a "time T"
+ * which is now, and requeueing everything except the expired
+ * connections and those matching the interface(s) being cleared.
+ */
+
+ /*
+ * first filter the sw_if_index bitmap that they want from us, by
+ * a bitmap of sw_if_index for which we actually have connections.
+ */
+ if ((pw->pending_clear_sw_if_index_bitmap == 0)
+ || (pw->serviced_sw_if_index_bitmap == 0))
+ {
+ elog_acl_maybe_trace_X1 (am,
+ "acl_fa_worker_conn_cleaner: now %lu, someone tried to call clear but one of the bitmaps are empty",
+ "i8", now);
+ clib_bitmap_zero (pw->pending_clear_sw_if_index_bitmap);
+ }
+ else
+ {
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning
+ ("WORKER-CLEAR: (before and) swiping sw-if-index bitmap: %U, my serviced bitmap %U",
+ format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap,
+ format_bitmap_hex, pw->serviced_sw_if_index_bitmap);
+#endif
+ pw->pending_clear_sw_if_index_bitmap =
+ clib_bitmap_and (pw->pending_clear_sw_if_index_bitmap,
+ pw->serviced_sw_if_index_bitmap);
+ }
+
+ if (clib_bitmap_is_zero (pw->pending_clear_sw_if_index_bitmap))
+ {
+ /* if the cross-section is a zero vector, no need to do anything. */
+ elog_acl_maybe_trace_X1 (am,
+ "acl_fa_worker_conn_cleaner: now %lu, clearing done, nothing to do",
+ "i8", now);
+ pw->clear_in_process = 0;
+ }
+ else
+ {
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning
+ ("WORKER-CLEAR: swiping sw-if-index bitmap: %U, my serviced bitmap %U",
+ format_bitmap_hex, pw->pending_clear_sw_if_index_bitmap,
+ format_bitmap_hex, pw->serviced_sw_if_index_bitmap);
+#endif
+ elog_acl_maybe_trace_X1 (am,
+ "acl_fa_worker_conn_cleaner: swiping until %lu",
+ "i8", now);
+ /* swipe through the connection lists until enqueue timestamps become above "now" */
+ pw->swipe_end_time = now;
+ }
+ }
+ }
+ num_expired = acl_fa_check_idle_sessions (am, thread_index, now);
+ // clib_warning("WORKER-CLEAR: checked %d sessions (clear_in_progress: %d)", num_expired, pw->clear_in_process);
+ elog_acl_maybe_trace_X2 (am,
+ "acl_fa_worker_conn_cleaner: checked %d sessions (clear_in_process: %d)",
+ "i4i4", (u32) num_expired,
+ (u32) pw->clear_in_process);
+ if (pw->clear_in_process)
+ {
+ if (0 == num_expired)
+ {
+ /* we were clearing but we could not process any more connections. time to stop. */
+ clib_bitmap_zero (pw->pending_clear_sw_if_index_bitmap);
+ pw->clear_in_process = 0;
+ elog_acl_maybe_trace_X1 (am,
+ "acl_fa_worker_conn_cleaner: now %lu, clearing done - all done",
+ "i8", now);
+ }
+ else
+ {
+ elog_acl_maybe_trace_X1 (am,
+ "acl_fa_worker_conn_cleaner: now %lu, more work to do - requesting interrupt",
+ "i8", now);
+ /* should continue clearing.. So could they please sent an interrupt again? */
+ pw->interrupt_is_needed = 1;
+ }
+ }
+ else
+ {
+ if (num_expired >= am->fa_max_deleted_sessions_per_interval)
+ {
+ /* there was too much work, we should get an interrupt ASAP */
+ pw->interrupt_is_needed = 1;
+ pw->interrupt_is_unwanted = 0;
+ }
+ else if (num_expired <= am->fa_min_deleted_sessions_per_interval)
+ {
+ /* signal that they should trigger us less */
+ pw->interrupt_is_needed = 0;
+ pw->interrupt_is_unwanted = 1;
+ }
+ else
+ {
+ /* the current rate of interrupts is ok */
+ pw->interrupt_is_needed = 0;
+ pw->interrupt_is_unwanted = 0;
+ }
+ elog_acl_maybe_trace_X3 (am,
+ "acl_fa_worker_conn_cleaner: now %lu, interrupt needed: %u, interrupt unwanted: %u",
+ "i8i4i4", now, ((u32) pw->interrupt_is_needed),
+ ((u32) pw->interrupt_is_unwanted));
+ }
+ pw->interrupt_generation = am->fa_interrupt_generation;
+ return 0;
+}
+
+static void
+send_one_worker_interrupt (vlib_main_t * vm, acl_main_t * am,
+ int thread_index)
+{
+ acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
+ if (!pw->interrupt_is_pending)
+ {
+ pw->interrupt_is_pending = 1;
+ vlib_node_set_interrupt_pending (vlib_mains[thread_index],
+ acl_fa_worker_session_cleaner_process_node.index);
+ elog_acl_maybe_trace_X1 (am,
+ "send_one_worker_interrupt: send interrupt to worker %d",
+ "i4", ((u32) thread_index));
+ /* if the interrupt was requested, mark that done. */
+ /* pw->interrupt_is_needed = 0; */
+ }
+}
+
+static void
+send_interrupts_to_workers (vlib_main_t * vm, acl_main_t * am)
+{
+ int i;
+ /* Can't use vec_len(am->per_worker_data) since the threads might not have come up yet; */
+ int n_threads = vec_len (vlib_mains);
+ for (i = 0; i < n_threads; i++)
+ {
+ send_one_worker_interrupt (vm, am, i);
+ }
+}
+
+/* centralized process to drive per-worker cleaners */
+static uword
+acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
+ vlib_frame_t * f)
+{
+ acl_main_t *am = &acl_main;
+ u64 now;
+ f64 cpu_cps = vm->clib_time.clocks_per_second;
+ u64 next_expire;
+ /* We should check if there are connections to clean up - at least twice a second */
+ u64 max_timer_wait_interval = cpu_cps / 2;
+ uword event_type, *event_data = 0;
+ acl_fa_per_worker_data_t *pw0;
+
+ am->fa_current_cleaner_timer_wait_interval = max_timer_wait_interval;
+ am->fa_cleaner_node_index = acl_fa_session_cleaner_process_node.index;
+ am->fa_interrupt_generation = 1;
+ while (1)
+ {
+ now = clib_cpu_time_now ();
+ next_expire = now + am->fa_current_cleaner_timer_wait_interval;
+ int has_pending_conns = 0;
+ u16 ti;
+ u8 tt;
+
+ /*
+ * walk over all per-thread list heads of different timeouts,
+ * and see if there are any connections pending.
+ * If there aren't - we do not need to wake up until the
+ * worker code signals that it has added a connection.
+ *
+ * Also, while we are at it, calculate the earliest we need to wake up.
+ */
+ for (ti = 0; ti < vec_len (vlib_mains); ti++)
+ {
+ if (ti >= vec_len (am->per_worker_data))
+ {
+ continue;
+ }
+ acl_fa_per_worker_data_t *pw = &am->per_worker_data[ti];
+ for (tt = 0; tt < vec_len (pw->fa_conn_list_head); tt++)
+ {
+ u64 head_expiry =
+ acl_fa_get_list_head_expiry_time (am, pw, now, ti, tt);
+ if ((head_expiry < next_expire) && !pw->interrupt_is_pending)
+ {
+ elog_acl_maybe_trace_X3 (am,
+ "acl_fa_session_cleaner_process: now %lu, worker: %d tt: %d",
+ "i8i2i2", now, ti, tt);
+ elog_acl_maybe_trace_X2 (am,
+ "acl_fa_session_cleaner_process: head expiry: %lu, is earlier than curr next expire: %lu",
+ "i8i8", head_expiry, next_expire);
+ next_expire = head_expiry;
+ }
+ if (~0 != pw->fa_conn_list_head[tt])
+ {
+ has_pending_conns = 1;
+ }
+ }
+ }
+
+ /* If no pending connections and no ACL applied then no point in timing out */
+ if (!has_pending_conns && (0 == am->fa_total_enabled_count))
+ {
+ am->fa_cleaner_cnt_wait_without_timeout++;
+ elog_acl_maybe_trace_X1 (am,
+ "acl_conn_cleaner: now %lu entering wait without timeout",
+ "i8", now);
+ (void) vlib_process_wait_for_event (vm);
+ event_type = vlib_process_get_events (vm, &event_data);
+ }
+ else
+ {
+ f64 timeout = ((i64) next_expire - (i64) now) / cpu_cps;
+ if (timeout <= 0)
+ {
+ /* skip waiting altogether */
+ event_type = ~0;
+ }
+ else
+ {
+ am->fa_cleaner_cnt_wait_with_timeout++;
+ elog_acl_maybe_trace_X2 (am,
+ "acl_conn_cleaner: now %lu entering wait with timeout %.6f sec",
+ "i8f8", now, timeout);
+ (void) vlib_process_wait_for_event_or_clock (vm, timeout);
+ event_type = vlib_process_get_events (vm, &event_data);
+ }
+ }
+
+ switch (event_type)
+ {
+ case ~0:
+ /* nothing to do */
+ break;
+ case ACL_FA_CLEANER_RESCHEDULE:
+ /* Nothing to do. */
+ break;
+ case ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX:
+ {
+ uword *clear_sw_if_index_bitmap = 0;
+ uword *sw_if_index0;
+ int clear_all = 0;
+ now = clib_cpu_time_now ();
+ elog_acl_maybe_trace_X1 (am,
+ "acl_fa_session_cleaner_process: now %lu, received ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX",
+ "i8", now);
+ vec_foreach (sw_if_index0, event_data)
+ {
+ am->fa_cleaner_cnt_delete_by_sw_index++;
+ elog_acl_maybe_trace_X1 (am,
+ "acl_fa_session_cleaner_process: ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX %d",
+ "i4", *sw_if_index0);
+ if (*sw_if_index0 == ~0)
+ {
+ clear_all = 1;
+ }
+ else
+ {
+ if (!pool_is_free_index
+ (am->vnet_main->interface_main.sw_interfaces,
+ *sw_if_index0))
+ {
+ clear_sw_if_index_bitmap =
+ clib_bitmap_set (clear_sw_if_index_bitmap,
+ *sw_if_index0, 1);
+ }
+ }
+ }
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning ("ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX bitmap: %U",
+ format_bitmap_hex, clear_sw_if_index_bitmap);
+#endif
+ vec_foreach (pw0, am->per_worker_data)
+ {
+ CLIB_MEMORY_BARRIER ();
+ while (pw0->clear_in_process)
+ {
+ CLIB_MEMORY_BARRIER ();
+ elog_acl_maybe_trace_X1 (am,
+ "ACL_FA_NODE_CLEAN: waiting previous cleaning cycle to finish on %d",
+ "i4",
+ (u32) (pw0 - am->per_worker_data));
+ vlib_process_suspend (vm, 0.0001);
+ if (pw0->interrupt_is_needed)
+ {
+ send_one_worker_interrupt (vm, am,
+ (pw0 - am->per_worker_data));
+ }
+ }
+ if (pw0->clear_in_process)
+ {
+ clib_warning
+ ("ERROR-BUG! Could not initiate cleaning on worker because another cleanup in progress");
+ }
+ else
+ {
+ if (clear_all)
+ {
+ /* if we need to clear all, then just clear the interfaces that we are servicing */
+ pw0->pending_clear_sw_if_index_bitmap =
+ clib_bitmap_dup (pw0->serviced_sw_if_index_bitmap);
+ }
+ else
+ {
+ pw0->pending_clear_sw_if_index_bitmap =
+ clib_bitmap_dup (clear_sw_if_index_bitmap);
+ }
+ pw0->clear_in_process = 1;
+ }
+ }
+ /* send some interrupts so they can start working */
+ send_interrupts_to_workers (vm, am);
+
+ /* now wait till they all complete */
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning ("CLEANER mains len: %d per-worker len: %d",
+ vec_len (vlib_mains),
+ vec_len (am->per_worker_data));
+#endif
+ vec_foreach (pw0, am->per_worker_data)
+ {
+ CLIB_MEMORY_BARRIER ();
+ while (pw0->clear_in_process)
+ {
+ CLIB_MEMORY_BARRIER ();
+ elog_acl_maybe_trace_X1 (am,
+ "ACL_FA_NODE_CLEAN: waiting for my cleaning cycle to finish on %d",
+ "i4",
+ (u32) (pw0 - am->per_worker_data));
+ vlib_process_suspend (vm, 0.0001);
+ if (pw0->interrupt_is_needed)
+ {
+ send_one_worker_interrupt (vm, am,
+ (pw0 - am->per_worker_data));
+ }
+ }
+ }
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning ("ACL_FA_NODE_CLEAN: cleaning done");
+#endif
+ clib_bitmap_free (clear_sw_if_index_bitmap);
+ }
+ break;
+ default:
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning ("ACL plugin connection cleaner: unknown event %u",
+ event_type);
+#endif
+ vlib_node_increment_counter (vm,
+ acl_fa_session_cleaner_process_node.
+ index,
+ ACL_FA_CLEANER_ERROR_UNKNOWN_EVENT, 1);
+ am->fa_cleaner_cnt_unknown_event++;
+ break;
+ }
+
+ send_interrupts_to_workers (vm, am);
+
+ if (event_data)
+ _vec_len (event_data) = 0;
+
+ /*
+ * If the interrupts were not processed yet, ensure we wait a bit,
+ * but up to a point.
+ */
+ int need_more_wait = 0;
+ int max_wait_cycles = 100;
+ do
+ {
+ need_more_wait = 0;
+ vec_foreach (pw0, am->per_worker_data)
+ {
+ if (pw0->interrupt_generation != am->fa_interrupt_generation)
+ {
+ need_more_wait = 1;
+ }
+ }
+ if (need_more_wait)
+ {
+ vlib_process_suspend (vm, 0.0001);
+ }
+ }
+ while (need_more_wait && (--max_wait_cycles > 0));
+
+ int interrupts_needed = 0;
+ int interrupts_unwanted = 0;
+
+ vec_foreach (pw0, am->per_worker_data)
+ {
+ if (pw0->interrupt_is_needed)
+ {
+ interrupts_needed++;
+ /* the per-worker value is reset when sending the interrupt */
+ }
+ if (pw0->interrupt_is_unwanted)
+ {
+ interrupts_unwanted++;
+ pw0->interrupt_is_unwanted = 0;
+ }
+ }
+ if (interrupts_needed)
+ {
+ /* they need more interrupts, do less waiting around next time */
+ am->fa_current_cleaner_timer_wait_interval /= 2;
+ /* never go into zero-wait either though - we need to give the space to others */
+ am->fa_current_cleaner_timer_wait_interval += 1;
+ }
+ else if (interrupts_unwanted)
+ {
+ /* slowly increase the amount of sleep up to a limit */
+ if (am->fa_current_cleaner_timer_wait_interval <
+ max_timer_wait_interval)
+ am->fa_current_cleaner_timer_wait_interval +=
+ cpu_cps * am->fa_cleaner_wait_time_increment;
+ }
+ am->fa_cleaner_cnt_event_cycles++;
+ am->fa_interrupt_generation++;
+ }
+ /* NOT REACHED */
+ return 0;
+}
+
+
+void
+acl_fa_enable_disable (u32 sw_if_index, int is_input, int enable_disable)
+{
+ acl_main_t *am = &acl_main;
+ if (enable_disable)
+ {
+ acl_fa_verify_init_sessions (am);
+ am->fa_total_enabled_count++;
+ void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
+ vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
+ ACL_FA_CLEANER_RESCHEDULE, 0);
+ clib_mem_set_heap (oldheap);
+ }
+ else
+ {
+ am->fa_total_enabled_count--;
+ }
+
+ if (is_input)
+ {
+ ASSERT (clib_bitmap_get (am->fa_in_acl_on_sw_if_index, sw_if_index) !=
+ enable_disable);
+ void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
+ vnet_feature_enable_disable ("ip4-unicast", "acl-plugin-in-ip4-fa",
+ sw_if_index, enable_disable, 0, 0);
+ vnet_feature_enable_disable ("ip6-unicast", "acl-plugin-in-ip6-fa",
+ sw_if_index, enable_disable, 0, 0);
+ clib_mem_set_heap (oldheap);
+ am->fa_in_acl_on_sw_if_index =
+ clib_bitmap_set (am->fa_in_acl_on_sw_if_index, sw_if_index,
+ enable_disable);
+ }
+ else
+ {
+ ASSERT (clib_bitmap_get (am->fa_out_acl_on_sw_if_index, sw_if_index) !=
+ enable_disable);
+ void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
+ vnet_feature_enable_disable ("ip4-output", "acl-plugin-out-ip4-fa",
+ sw_if_index, enable_disable, 0, 0);
+ vnet_feature_enable_disable ("ip6-output", "acl-plugin-out-ip6-fa",
+ sw_if_index, enable_disable, 0, 0);
+ clib_mem_set_heap (oldheap);
+ am->fa_out_acl_on_sw_if_index =
+ clib_bitmap_set (am->fa_out_acl_on_sw_if_index, sw_if_index,
+ enable_disable);
+ }
+ if ((!enable_disable) && (!acl_fa_ifc_has_in_acl (am, sw_if_index))
+ && (!acl_fa_ifc_has_out_acl (am, sw_if_index)))
+ {
+#ifdef FA_NODE_VERBOSE_DEBUG
+ clib_warning ("ENABLE-DISABLE: clean the connections on interface %d",
+ sw_if_index);
+#endif
+ void *oldheap = clib_mem_set_heap (am->vlib_main->heap_base);
+ vlib_process_signal_event (am->vlib_main, am->fa_cleaner_node_index,
+ ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX,
+ sw_if_index);
+ clib_mem_set_heap (oldheap);
+ }
+}
+
+void
+show_fa_sessions_hash (vlib_main_t * vm, u32 verbose)
+{
+ acl_main_t *am = &acl_main;
+ if (am->fa_sessions_hash_is_initialized)
+ {
+ vlib_cli_output (vm, "\nSession lookup hash table:\n%U\n\n",
+ format_bihash_40_8, &am->fa_sessions_hash, verbose);
+ }
+ else
+ {
+ vlib_cli_output (vm,
+ "\nSession lookup hash table is not allocated.\n\n");
+ }
+}
+
+
+/* *INDENT-OFF* */
+
+VLIB_REGISTER_NODE (acl_fa_worker_session_cleaner_process_node, static) = {
+ .function = acl_fa_worker_conn_cleaner_process,
+ .name = "acl-plugin-fa-worker-cleaner-process",
+ .type = VLIB_NODE_TYPE_INPUT,
+ .state = VLIB_NODE_STATE_INTERRUPT,
+};
+
+VLIB_REGISTER_NODE (acl_fa_session_cleaner_process_node, static) = {
+ .function = acl_fa_session_cleaner_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "acl-plugin-fa-cleaner-process",
+ .n_errors = ARRAY_LEN (acl_fa_cleaner_error_strings),
+ .error_strings = acl_fa_cleaner_error_strings,
+ .n_next_nodes = 0,
+ .next_nodes = {},
+};
+
+
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */