mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-10 05:08:42 +00:00
BGP now runs in its own thread
This commit is contained in:
Maria Matejka
parent
fccaeb0141
commit
aca4c3fc8e
@ -158,6 +158,8 @@ static inline void channel_refresh_end_reload(struct channel *c)
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static int
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bgp_open(struct bgp_proto *p)
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{
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ASSERT_DIE(birdloop_inside(&main_birdloop));
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struct bgp_socket *bs = NULL;
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struct iface *ifa = p->cf->strict_bind ? p->cf->iface : NULL;
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ip_addr addr = p->cf->strict_bind ? p->cf->local_ip :
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@ -182,7 +184,7 @@ bgp_open(struct bgp_proto *p)
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sk->sport = port;
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sk->iface = ifa;
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sk->vrf = p->p.vrf;
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sk->flags = 0;
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sk->flags = SKF_PASSIVE_THREAD;
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sk->tos = IP_PREC_INTERNET_CONTROL;
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sk->rbsize = BGP_RX_BUFFER_SIZE;
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sk->tbsize = BGP_TX_BUFFER_SIZE;
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@ -218,6 +220,7 @@ err:
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static void
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bgp_close(struct bgp_proto *p)
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{
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ASSERT_DIE(birdloop_inside(&main_birdloop));
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struct bgp_socket *bs = p->sock;
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ASSERT(bs && bs->uc);
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@ -312,7 +315,7 @@ bgp_initiate(struct bgp_proto *p)
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{
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p->start_state = BSS_DELAY;
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BGP_TRACE(D_EVENTS, "Startup delayed by %d seconds due to errors", p->startup_delay);
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bgp_start_timer(p->startup_timer, p->startup_delay);
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bgp_start_timer(p, p->startup_timer, p->startup_delay);
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}
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else
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bgp_startup(p);
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@ -333,6 +336,7 @@ err1:
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/**
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* bgp_start_timer - start a BGP timer
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* @p: bgp_proto which the timer belongs to
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* @t: timer
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* @value: time (in seconds) to fire (0 to disable the timer)
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*
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@ -341,14 +345,16 @@ err1:
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* timers.
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*/
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void
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bgp_start_timer(timer *t, uint value)
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bgp_start_timer(struct bgp_proto *p, timer *t, uint value)
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{
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BGP_ASSERT_INSIDE(p);
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if (value)
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{
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/* The randomization procedure is specified in RFC 4271 section 10 */
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btime time = value S;
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btime randomize = random() % ((time / 4) + 1);
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tm_start(t, time - randomize);
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tm_start_in(t, time - randomize, p->p.loop);
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}
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else
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tm_stop(t);
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@ -364,7 +370,7 @@ bgp_start_timer(timer *t, uint value)
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void
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bgp_close_conn(struct bgp_conn *conn)
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{
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// struct bgp_proto *p = conn->bgp;
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BGP_ASSERT_INSIDE(conn->bgp);
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DBG("BGP: Closing connection\n");
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conn->packets_to_send = 0;
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@ -456,6 +462,8 @@ bgp_graceful_close_conn(struct bgp_conn *conn, int subcode, byte *data, uint len
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static void
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bgp_down(struct bgp_proto *p)
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{
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bgp_start_timer(p, p->startup_timer, 0);
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if (p->start_state > BSS_PREPARE)
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{
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bgp_setup_auth(p, 0);
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@ -469,21 +477,34 @@ bgp_down(struct bgp_proto *p)
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}
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static void
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bgp_decision(void *vp)
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bgp_active_event(void *vp)
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{
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struct bgp_proto *p = vp;
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DBG("BGP: Decision start\n");
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BGP_ASSERT_INSIDE(p);
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DBG("%s: Decision start\n", p->p.name);
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if ((p->p.proto_state == PS_START) &&
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(p->outgoing_conn.state == BS_IDLE) &&
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(p->incoming_conn.state != BS_OPENCONFIRM) &&
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!p->passive)
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bgp_active(p);
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}
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static void
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bgp_down_event(void *vp)
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{
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struct bgp_proto *p = vp;
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BGP_ENTER(p);
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DBG("%s: Down event\n", p->p.name);
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if ((p->p.proto_state == PS_STOP) &&
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(p->outgoing_conn.state == BS_IDLE) &&
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(p->incoming_conn.state == BS_IDLE))
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bgp_down(p);
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BGP_LEAVE(p);
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}
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static struct bgp_proto *
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@ -515,7 +536,7 @@ bgp_stop(struct bgp_proto *p, int subcode, byte *data, uint len)
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proto_notify_state(&p->p, PS_STOP);
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bgp_graceful_close_conn(&p->outgoing_conn, subcode, data, len);
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bgp_graceful_close_conn(&p->incoming_conn, subcode, data, len);
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ev_schedule(p->event);
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ev_send_loop(&main_birdloop, p->down_event);
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}
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static inline void
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@ -707,7 +728,7 @@ bgp_conn_enter_close_state(struct bgp_conn *conn)
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conn->sk->rx_hook = NULL;
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/* Timeout for CLOSE state, if we cannot send notification soon then we just hangup */
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bgp_start_timer(conn->hold_timer, 10);
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bgp_start_timer(p, conn->hold_timer, 10);
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if (os == BS_ESTABLISHED)
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bgp_conn_leave_established_state(p);
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@ -721,7 +742,8 @@ bgp_conn_enter_idle_state(struct bgp_conn *conn)
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bgp_close_conn(conn);
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bgp_conn_set_state(conn, BS_IDLE);
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ev_schedule(p->event);
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ev_send_loop(p->p.loop, p->active_event);
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ev_send_loop(&main_birdloop, p->down_event);
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if (os == BS_ESTABLISHED)
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bgp_conn_leave_established_state(p);
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@ -796,7 +818,7 @@ bgp_handle_graceful_restart(struct bgp_proto *p)
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ASSERT(p->gr_active_num > 0);
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proto_notify_state(&p->p, PS_START);
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tm_start(p->gr_timer, p->conn->remote_caps->gr_time S);
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tm_start_in(p->gr_timer, p->conn->remote_caps->gr_time S, p->p.loop);
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}
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static void
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@ -911,7 +933,7 @@ bgp_graceful_restart_timeout(timer *t)
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/* Channel is in GR, and supports LLGR -> start LLGR */
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c->gr_active = BGP_GRS_LLGR;
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tm_start(c->stale_timer, c->stale_time S);
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tm_start_in(c->stale_timer, c->stale_time S, p->p.loop);
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bgp_graceful_restart_feed(c);
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}
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}
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@ -988,7 +1010,7 @@ bgp_send_open(struct bgp_conn *conn)
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bgp_prepare_capabilities(conn);
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bgp_schedule_packet(conn, NULL, PKT_OPEN);
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bgp_conn_set_state(conn, BS_OPENSENT);
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bgp_start_timer(conn->hold_timer, conn->bgp->cf->initial_hold_time);
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bgp_start_timer(conn->bgp, conn->hold_timer, conn->bgp->cf->initial_hold_time);
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}
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static void
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@ -1065,7 +1087,7 @@ bgp_hold_timeout(timer *t)
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and perhaps just not processed BGP packets in time. */
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if (sk_rx_ready(conn->sk) > 0)
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bgp_start_timer(conn->hold_timer, 10);
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bgp_start_timer(p, conn->hold_timer, 10);
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else if ((conn->state == BS_ESTABLISHED) && p->llgr_ready)
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{
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BGP_TRACE(D_EVENTS, "Hold timer expired");
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@ -1110,10 +1132,12 @@ bgp_setup_conn(struct bgp_proto *p, struct bgp_conn *conn)
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static void
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bgp_setup_sk(struct bgp_conn *conn, sock *s)
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{
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ASSERT_DIE(s->flags & SKF_THREAD);
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s->data = conn;
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s->err_hook = bgp_sock_err;
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s->fast_rx = 1;
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conn->sk = s;
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sk_start(s);
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}
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static void
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@ -1122,10 +1146,12 @@ bgp_active(struct bgp_proto *p)
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int delay = MAX(1, p->cf->connect_delay_time);
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struct bgp_conn *conn = &p->outgoing_conn;
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BGP_ASSERT_INSIDE(p);
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BGP_TRACE(D_EVENTS, "Connect delayed by %d seconds", delay);
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bgp_setup_conn(p, conn);
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bgp_conn_set_state(conn, BS_ACTIVE);
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bgp_start_timer(conn->connect_timer, delay);
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bgp_start_timer(p, conn->connect_timer, delay);
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}
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/**
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@ -1142,9 +1168,12 @@ bgp_connect(struct bgp_proto *p) /* Enter Connect state and start establishing c
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struct bgp_conn *conn = &p->outgoing_conn;
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int hops = p->cf->multihop ? : 1;
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BGP_ASSERT_INSIDE(p);
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DBG("BGP: Connecting\n");
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sock *s = sk_new(p->p.pool);
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s->type = SK_TCP_ACTIVE;
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s->flags |= SKF_THREAD;
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s->saddr = p->local_ip;
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s->daddr = p->remote_ip;
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s->dport = p->cf->remote_port;
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@ -1172,7 +1201,7 @@ bgp_connect(struct bgp_proto *p) /* Enter Connect state and start establishing c
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goto err;
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DBG("BGP: Waiting for connect success\n");
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bgp_start_timer(conn->connect_timer, p->cf->connect_retry_time);
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bgp_start_timer(p, conn->connect_timer, p->cf->connect_retry_time);
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return;
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err:
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@ -1244,6 +1273,8 @@ bgp_incoming_connection(sock *sk, uint dummy UNUSED)
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return 0;
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}
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BGP_ENTER(p);
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/*
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* BIRD should keep multiple incoming connections in OpenSent state (for
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* details RFC 4271 8.2.1 par 3), but it keeps just one. Duplicate incoming
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@ -1273,6 +1304,7 @@ bgp_incoming_connection(sock *sk, uint dummy UNUSED)
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if (!acc)
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{
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rfree(sk);
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BGP_LEAVE(p);
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return 0;
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}
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@ -1298,6 +1330,7 @@ bgp_incoming_connection(sock *sk, uint dummy UNUSED)
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p = bgp_spawn(p, sk->daddr);
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p->postponed_sk = sk;
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rmove(sk, p->p.pool);
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BGP_LEAVE(p);
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return 0;
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}
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@ -1305,12 +1338,14 @@ bgp_incoming_connection(sock *sk, uint dummy UNUSED)
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bgp_setup_conn(p, &p->incoming_conn);
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bgp_setup_sk(&p->incoming_conn, sk);
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bgp_send_open(&p->incoming_conn);
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BGP_LEAVE(p);
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return 0;
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err:
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sk_log_error(sk, p->p.name);
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log(L_ERR "%s: Incoming connection aborted", p->p.name);
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rfree(sk);
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BGP_LEAVE(p);
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return 0;
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}
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@ -1345,10 +1380,9 @@ bgp_neigh_notify(neighbor *n)
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struct bgp_proto *p = (struct bgp_proto *) n->proto;
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int ps = p->p.proto_state;
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if (n != p->neigh)
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return;
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BGP_ASSERT_INSIDE(p);
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if ((ps == PS_DOWN) || (ps == PS_STOP))
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if ((n != p->neigh) || (ps == PS_DOWN) || (ps == PS_STOP))
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return;
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int prepare = (ps == PS_START) && (p->start_state == BSS_PREPARE);
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@ -1504,9 +1538,12 @@ bgp_start_locked(struct object_lock *lock)
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struct bgp_proto *p = lock->data;
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const struct bgp_config *cf = p->cf;
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BGP_ENTER(p);
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if (p->p.proto_state != PS_START)
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{
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DBG("BGP: Got lock in different state %d\n", p->p.proto_state);
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BGP_LEAVE(p);
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return;
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}
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@ -1516,6 +1553,7 @@ bgp_start_locked(struct object_lock *lock)
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{
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/* Multi-hop sessions do not use neighbor entries */
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bgp_initiate(p);
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BGP_LEAVE(p);
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return;
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}
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@ -1527,6 +1565,7 @@ bgp_start_locked(struct object_lock *lock)
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p->p.disabled = 1;
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bgp_store_error(p, NULL, BE_MISC, BEM_INVALID_NEXT_HOP);
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proto_notify_state(&p->p, PS_DOWN);
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BGP_LEAVE(p);
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return;
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}
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@ -1538,6 +1577,8 @@ bgp_start_locked(struct object_lock *lock)
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BGP_TRACE(D_EVENTS, "Waiting for link on %s", n->iface->name);
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else
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bgp_start_neighbor(p);
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BGP_LEAVE(p);
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}
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static int
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@ -1576,7 +1617,8 @@ bgp_start(struct proto *P)
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p->stats.rx_bytes = p->stats.tx_bytes = 0;
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p->last_rx_update = 0;
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p->event = ev_new_init(p->p.pool, bgp_decision, p);
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p->active_event = ev_new_init(p->p.pool, bgp_active_event, p);
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p->down_event = ev_new_init(p->p.pool, bgp_down_event, p);
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p->startup_timer = tm_new_init(p->p.pool, bgp_startup_timeout, p, 0, 0);
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p->gr_timer = tm_new_init(p->p.pool, bgp_graceful_restart_timeout, p, 0, 0);
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@ -2472,6 +2514,9 @@ bgp_show_proto_info(struct proto *P)
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{
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struct bgp_proto *p = (struct bgp_proto *) P;
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if (p->p.proto_state != PS_DOWN)
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BGP_ASSERT_INSIDE(p);
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cli_msg(-1006, " BGP state: %s", bgp_state_dsc(p));
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if (bgp_is_dynamic(p) && p->cf->remote_range)
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@ -322,7 +322,8 @@ struct bgp_proto {
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btime last_established; /* Last time of enter/leave of established state */
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btime last_rx_update; /* Last time of RX update */
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ip_addr link_addr; /* Link-local version of local_ip */
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event *event; /* Event for respawning and shutting process */
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event *active_event; /* Event for respawning */
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event *down_event; /* Event to shut down */
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timer *startup_timer; /* Timer used to delay protocol startup due to previous errors (startup_delay) */
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timer *gr_timer; /* Timer waiting for reestablishment after graceful restart */
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int dynamic_name_counter; /* Counter for dynamic BGP names */
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@ -496,7 +497,7 @@ bgp_parse_error(struct bgp_parse_state *s, uint subcode)
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}
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void bgp_start_timer(timer *t, uint value);
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void bgp_start_timer(struct bgp_proto *p, timer *t, uint value);
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void bgp_check_config(struct bgp_config *c);
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void bgp_error(struct bgp_conn *c, unsigned code, unsigned subcode, byte *data, int len);
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void bgp_close_conn(struct bgp_conn *c);
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@ -760,5 +761,10 @@ void bgp_update_next_hop(struct bgp_export_state *s, eattr *a, ea_list **to);
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#define ORIGIN_EGP 1
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#define ORIGIN_INCOMPLETE 2
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/* Loop */
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#define BGP_ENTER(bgp) birdloop_enter(bgp->p.loop)
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#define BGP_LEAVE(bgp) birdloop_leave(bgp->p.loop)
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#define BGP_ASSERT_INSIDE(bgp) ASSERT_DIE((bgp->p.loop != &main_birdloop) && birdloop_inside(bgp->p.loop))
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#endif
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@ -48,6 +48,7 @@ proto: bgp_proto '}' ;
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bgp_proto_start: proto_start BGP {
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this_proto = proto_config_new(&proto_bgp, $1);
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this_proto->loop_order = DOMAIN_ORDER(proto);
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BGP_CFG->local_port = BGP_PORT;
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BGP_CFG->remote_port = BGP_PORT;
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BGP_CFG->multihop = -1; /* undefined */
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@ -914,7 +914,7 @@ bgp_rx_open(struct bgp_conn *conn, byte *pkt, uint len)
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conn->hold_time, conn->keepalive_time, p->remote_as, p->remote_id, conn->as4_session);
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bgp_schedule_packet(conn, NULL, PKT_KEEPALIVE);
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bgp_start_timer(conn->hold_timer, conn->hold_time);
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bgp_start_timer(p, conn->hold_timer, conn->hold_time);
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bgp_conn_enter_openconfirm_state(conn);
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}
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@ -2475,7 +2475,7 @@ bgp_rx_update(struct bgp_conn *conn, byte *pkt, uint len)
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if (conn->state != BS_ESTABLISHED)
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{ bgp_error(conn, 5, fsm_err_subcode[conn->state], NULL, 0); return; }
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bgp_start_timer(conn->hold_timer, conn->hold_time);
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bgp_start_timer(p, conn->hold_timer, conn->hold_time);
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/* Initialize parse state */
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struct bgp_parse_state s = {
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@ -2811,7 +2811,7 @@ bgp_fire_tx(struct bgp_conn *conn)
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{
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conn->packets_to_send &= ~(1 << PKT_KEEPALIVE);
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BGP_TRACE(D_PACKETS, "Sending KEEPALIVE");
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bgp_start_timer(conn->keepalive_timer, conn->keepalive_time);
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bgp_start_timer(p, conn->keepalive_timer, conn->keepalive_time);
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return bgp_send(conn, PKT_KEEPALIVE, BGP_HEADER_LENGTH);
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}
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else while (conn->channels_to_send)
|
||||
@ -2896,7 +2896,7 @@ bgp_schedule_packet(struct bgp_conn *conn, struct bgp_channel *c, int type)
|
||||
conn->packets_to_send |= 1 << type;
|
||||
|
||||
if ((conn->sk->tpos == conn->sk->tbuf) && !ev_active(conn->tx_ev))
|
||||
ev_schedule(conn->tx_ev);
|
||||
ev_send_loop(conn->bgp->p.loop, conn->tx_ev);
|
||||
}
|
||||
void
|
||||
bgp_kick_tx(void *vconn)
|
||||
@ -2909,7 +2909,7 @@ bgp_kick_tx(void *vconn)
|
||||
;
|
||||
|
||||
if (!max && !ev_active(conn->tx_ev))
|
||||
ev_schedule(conn->tx_ev);
|
||||
ev_send_loop(conn->bgp->p.loop, conn->tx_ev);
|
||||
}
|
||||
|
||||
void
|
||||
@ -2923,7 +2923,7 @@ bgp_tx(sock *sk)
|
||||
;
|
||||
|
||||
if (!max && !ev_active(conn->tx_ev))
|
||||
ev_schedule(conn->tx_ev);
|
||||
ev_send_loop(conn->bgp->p.loop, conn->tx_ev);
|
||||
}
|
||||
|
||||
|
||||
@ -3105,7 +3105,7 @@ bgp_rx_keepalive(struct bgp_conn *conn)
|
||||
struct bgp_proto *p = conn->bgp;
|
||||
|
||||
BGP_TRACE(D_PACKETS, "Got KEEPALIVE");
|
||||
bgp_start_timer(conn->hold_timer, conn->hold_time);
|
||||
bgp_start_timer(p, conn->hold_timer, conn->hold_time);
|
||||
|
||||
if (conn->state == BS_OPENCONFIRM)
|
||||
{ bgp_conn_enter_established_state(conn); return; }
|
||||
|
||||
Loading…
Reference in New Issue
Block a user