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c0e9441e79b63ea09d5b282910d104960d45026d
vpp/src/plugins/acl/sess_mgmt_node.c
Andrew Yourtchenko a6386d4ec4 acl-plugin: introduce a format function for l4 session key 
Abstracting out the internal format function
for L4 session key type makes the other
acl plugin format/print functions more maintainable.

Change-Id: Ica1302263a42981555462b5338d18d9a9f9c8342
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
2018-10-24 21:21:19 +02:00

970 lines
29 KiB
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/*
* 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>
static_always_inline u8 *
format_ip46_session_bihash_kv (u8 * s, va_list * args, int is_ip6)
{
fa_5tuple_t a5t;
void *paddr0;
void *paddr1;
void *format_addr_func;
if (is_ip6)
{
clib_bihash_kv_40_8_t *kv_40_8 =
va_arg (*args, clib_bihash_kv_40_8_t *);
a5t.kv_40_8 = *kv_40_8;
paddr0 = &a5t.ip6_addr[0];
paddr1 = &a5t.ip6_addr[1];
format_addr_func = format_ip6_address;
}
else
{
clib_bihash_kv_16_8_t *kv_16_8 =
va_arg (*args, clib_bihash_kv_16_8_t *);
a5t.kv_16_8 = *kv_16_8;
paddr0 = &a5t.ip4_addr[0];
paddr1 = &a5t.ip4_addr[1];
format_addr_func = format_ip4_address;
}
fa_full_session_id_t *sess = (fa_full_session_id_t *) & a5t.pkt;
return (format (s, "l3 %U -> %U %U | sess id %d thread id %d epoch %04x",
format_addr_func, paddr0,
format_addr_func, paddr1,
format_fa_session_l4_key, &a5t.l4,
sess->session_index, sess->thread_index,
sess->intf_policy_epoch));
}
static u8 *
format_ip6_session_bihash_kv (u8 * s, va_list * args)
{
return format_ip46_session_bihash_kv (s, args, 1);
}
static u8 *
format_ip4_session_bihash_kv (u8 * s, va_list * args)
{
return format_ip46_session_bihash_kv (s, args, 0);
}
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_ip6_sessions_hash,
"ACL plugin FA IPv6 session bihash",
am->fa_conn_table_hash_num_buckets,
am->fa_conn_table_hash_memory_size);
clib_bihash_set_kvp_format_fn_40_8 (&am->fa_ip6_sessions_hash,
format_ip6_session_bihash_kv);
clib_bihash_init_16_8 (&am->fa_ip4_sessions_hash,
"ACL plugin FA IPv4 session bihash",
am->fa_conn_table_hash_num_buckets,
am->fa_conn_table_hash_memory_size);
clib_bihash_set_kvp_format_fn_16_8 (&am->fa_ip4_sessions_hash,
format_ip4_session_bihash_kv);
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 / 1000;
timeout = fa_session_get_timeout (am, sess);
/* for all user lists, check them twice per timeout */
timeout >>= (sess->link_list_id != ACL_TIMEOUT_PURGATORY);
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)
{
return pw->fa_conn_list_head_expiry_time[timeout_type];
}
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)
{
if (session_index == FA_SESSION_BOGUS_INDEX)
return 0;
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;
/* let the other threads enqueue more requests while we process, if they like */
aclp_swap_wip_and_pending_session_change_requests (am, thread_index);
u64 *psr = NULL;
vec_foreach (psr, pw->wip_session_change_requests)
{
acl_fa_sess_req_t op = *psr >> 32;
fsid.session_index = *psr & 0xffffffff;
switch (op)
{
case ACL_FA_REQ_SESS_RESCHEDULE:
acl_fa_restart_timer_for_session (am, now, fsid);
break;
default:
/* do nothing */
break;
}
}
if (pw->wip_session_change_requests)
_vec_len (pw->wip_session_change_requests) = 0;
{
u8 tt = 0;
int n_pending_swipes = 0;
for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
{
int n_expired = 0;
while (n_expired < am->fa_max_deleted_sessions_per_interval)
{
fsid.session_index = pw->fa_conn_list_head[tt];
if (!acl_fa_conn_time_to_check
(am, pw, now, thread_index, pw->fa_conn_list_head[tt]))
{
break;
}
if (am->trace_sessions > 3)
{
elog_acl_maybe_trace_X3 (am,
"acl_fa_check_idle_sessions: expire session %d in list %d on thread %d",
"i4i4i4", (u32) fsid.session_index,
(u32) tt, (u32) thread_index);
}
vec_add1 (pw->expired, fsid.session_index);
n_expired++;
acl_fa_conn_list_delete_session (am, fsid, now);
}
}
for (tt = 0; tt < ACL_N_TIMEOUTS; tt++)
{
u32 session_index = pw->fa_conn_list_head[tt];
if (session_index == FA_SESSION_BOGUS_INDEX)
break;
fa_session_t *sess =
get_session_ptr (am, thread_index, session_index);
n_pending_swipes += sess->link_enqueue_time <= pw->swipe_end_time;
}
if (n_pending_swipes == 0)
{
pw->swipe_end_time = 0;
}
}
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);
int timeout_passed = (now >= sess_timeout_time);
int clearing_interface =
clib_bitmap_get (pw->pending_clear_sw_if_index_bitmap, sw_if_index);
if (am->trace_sessions > 3)
{
elog_acl_maybe_trace_X2 (am,
"acl_fa_check_idle_sessions: now %lu sess_timeout_time %lu",
"i8i8", now, sess_timeout_time);
elog_acl_maybe_trace_X4 (am,
"acl_fa_check_idle_sessions: session %d sw_if_index %d timeout_passed %d clearing_interface %d",
"i4i4i4i4", (u32) fsid.session_index,
(u32) sess->sw_if_index,
(u32) timeout_passed,
(u32) clearing_interface);
}
if (timeout_passed || clearing_interface)
{
if (acl_fa_two_stage_delete_session (am, sw_if_index, fsid, now))
{
if (am->trace_sessions > 3)
{
elog_acl_maybe_trace_X2 (am,
"acl_fa_check_idle_sessions: deleted session %d sw_if_index %d",
"i4i4", (u32) fsid.session_index,
(u32) sess->sw_if_index);
}
/* the session has been put */
pw->cnt_deleted_sessions++;
}
else
{
/* the connection marked as deleted and put to purgatory */
if (am->trace_sessions > 3)
{
elog_acl_maybe_trace_X2 (am,
"acl_fa_check_idle_sessions: session %d sw_if_index %d marked as deleted, put to purgatory",
"i4i4", (u32) fsid.session_index,
(u32) sess->sw_if_index);
}
}
}
else
{
if (am->trace_sessions > 3)
{
elog_acl_maybe_trace_X2 (am,
"acl_fa_check_idle_sessions: restart timer for session %d sw_if_index %d",
"i4i4", (u32) fsid.session_index,
(u32) sess->sw_if_index);
}
/* 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
{
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;
elog_acl_maybe_trace_X1 (am,
"acl_fa_check_idle_sessions: done, total sessions expired: %d",
"i4", (u32) total_expired);
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;
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 %u",
"i4", ((u32) thread_index));
/* if the interrupt was requested, mark that done. */
/* pw->interrupt_is_needed = 0; */
CLIB_MEMORY_BARRIER ();
}
}
void
aclp_post_session_change_request (acl_main_t * am, u32 target_thread,
u32 target_session, u32 request_type)
{
acl_fa_per_worker_data_t *pw_me =
&am->per_worker_data[os_get_thread_index ()];
acl_fa_per_worker_data_t *pw = &am->per_worker_data[target_thread];
clib_spinlock_lock_if_init (&pw->pending_session_change_request_lock);
/* vec_add1 might cause a reallocation, change the heap just in case */
void *oldheap = clib_mem_set_heap (am->acl_mheap);
vec_add1 (pw->pending_session_change_requests,
(((u64) request_type) << 32) | target_session);
clib_mem_set_heap (oldheap);
pw->rcvd_session_change_requests++;
pw_me->sent_session_change_requests++;
if (vec_len (pw->pending_session_change_requests) == 1)
{
/* ensure the requests get processed */
send_one_worker_interrupt (am->vlib_main, am, target_thread);
}
clib_spinlock_unlock_if_init (&pw->pending_session_change_request_lock);
}
void
aclp_swap_wip_and_pending_session_change_requests (acl_main_t * am,
u32 target_thread)
{
acl_fa_per_worker_data_t *pw = &am->per_worker_data[target_thread];
u64 *tmp;
clib_spinlock_lock_if_init (&pw->pending_session_change_request_lock);
tmp = pw->pending_session_change_requests;
pw->pending_session_change_requests = pw->wip_session_change_requests;
pw->wip_session_change_requests = tmp;
clib_spinlock_unlock_if_init (&pw->pending_session_change_request_lock);
}
static int
purgatory_has_connections (vlib_main_t * vm, acl_main_t * am,
int thread_index)
{
acl_fa_per_worker_data_t *pw = &am->per_worker_data[thread_index];
return (FA_SESSION_BOGUS_INDEX !=
pw->fa_conn_list_head[ACL_TIMEOUT_PURGATORY]);
}
/*
* 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;
pw->swipe_end_time = 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 (pw->swipe_end_time == 0)
{
/* 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? */
send_one_worker_interrupt (vm, am, thread_index);
// pw->interrupt_is_needed = 1;
}
}
else
{
if (num_expired > 0)
{
/* there was too much work, we should get an interrupt ASAP */
// pw->interrupt_is_needed = 1;
send_one_worker_interrupt (vm, am, thread_index);
pw->interrupt_is_unwanted = 0;
}
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));
}
/* be persistent about quickly deleting the connections from the purgatory */
if (purgatory_has_connections (vm, am, thread_index))
{
send_one_worker_interrupt (vm, am, thread_index);
}
pw->interrupt_generation = am->fa_interrupt_generation;
return 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: %u tt: %u",
"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 (FA_SESSION_BOGUS_INDEX != 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 %u",
"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);
}
}
}
acl_log_info
("ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX bitmap: %U, clear_all: %u",
format_bitmap_hex, clear_sw_if_index_bitmap, clear_all);
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 %u",
"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)
{
acl_log_err
("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);
}
acl_log_info
("ACL_FA_CLEANER: thread %u, pending clear bitmap: %U",
(am->per_worker_data - pw0), format_bitmap_hex,
pw0->pending_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 */
acl_log_info ("CLEANER mains len: %u per-worker len: %d",
vec_len (vlib_mains),
vec_len (am->per_worker_data));
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 %u",
"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));
}
}
}
acl_log_info ("ACL_FA_NODE_CLEAN: cleaning done");
clib_bitmap_free (clear_sw_if_index_bitmap);
}
am->fa_cleaner_cnt_delete_by_sw_index_ok++;
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, "\nIPv6 Session lookup hash table:\n%U\n\n",
format_bihash_40_8, &am->fa_ip6_sessions_hash,
verbose);
vlib_cli_output (vm, "\nIPv4 Session lookup hash table:\n%U\n\n",
format_bihash_16_8, &am->fa_ip4_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:
*/
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