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Merge pull request #5197 from SumitAgarwal123/BFD_ADMIN_DOWN

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bfdd: Handling local and remote admin-down
This commit is contained in:
Rafael Zalamena 2019-10-29 12:12:27 -03:00 committed by GitHub
commit 37cdb6e91d
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GPG Key ID: 4AEE18F83AFDEB23
12 changed files with 78 additions and 21 deletions
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46
bfdd/bfd.c
View File

@ -49,6 +49,8 @@ static void bs_admin_down_handler(struct bfd_session *bs, int nstate);
static void bs_down_handler(struct bfd_session *bs, int nstate);
static void bs_init_handler(struct bfd_session *bs, int nstate);
static void bs_up_handler(struct bfd_session *bs, int nstate);
static void bs_neighbour_admin_down_handler(struct bfd_session *bfd,
uint8_t diag);
/* Zeroed array with the size of an IPv6 address. */
struct in6_addr zero_addr;
@ -312,7 +314,7 @@ void ptm_bfd_sess_up(struct bfd_session *bfd)
/* Start sending control packets with poll bit immediately. */
ptm_bfd_snd(bfd, 0);
control_notify(bfd);
control_notify(bfd, bfd->ses_state);
if (old_state != bfd->ses_state) {
bfd->stats.session_up++;
@ -347,7 +349,7 @@ void ptm_bfd_sess_dn(struct bfd_session *bfd, uint8_t diag)
/* only signal clients when going from up->down state */
if (old_state == PTM_BFD_UP)
control_notify(bfd);
control_notify(bfd, PTM_BFD_DOWN);
/* Stop echo packet transmission if they are active */
if (BFD_CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE))
@ -582,7 +584,7 @@ skip_echo:
/* Change and notify state change. */
bs->ses_state = PTM_BFD_ADM_DOWN;
control_notify(bs);
control_notify(bs, bs->ses_state);
/* Don't try to send packets with a disabled session. */
if (bs->sock != -1)
@ -596,7 +598,7 @@ skip_echo:
/* Change and notify state change. */
bs->ses_state = PTM_BFD_DOWN;
control_notify(bs);
control_notify(bs, bs->ses_state);
/* Enable all timers. */
bfd_recvtimer_update(bs);
@ -868,10 +870,46 @@ static void bs_init_handler(struct bfd_session *bs, int nstate)
}
}
static void bs_neighbour_admin_down_handler(struct bfd_session *bfd,
uint8_t diag)
{
int old_state = bfd->ses_state;
bfd->local_diag = diag;
bfd->discrs.remote_discr = 0;
bfd->ses_state = PTM_BFD_DOWN;
bfd->polling = 0;
bfd->demand_mode = 0;
monotime(&bfd->downtime);
/* Slow down the control packets, the connection is down. */
bs_set_slow_timers(bfd);
/* only signal clients when going from up->down state */
if (old_state == PTM_BFD_UP)
control_notify(bfd, PTM_BFD_ADM_DOWN);
/* Stop echo packet transmission if they are active */
if (BFD_CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE))
ptm_bfd_echo_stop(bfd);
if (old_state != bfd->ses_state) {
bfd->stats.session_down++;
log_info("state-change: [%s] %s -> %s reason:%s",
bs_to_string(bfd), state_list[old_state].str,
state_list[bfd->ses_state].str,
get_diag_str(bfd->local_diag));
}
}
static void bs_up_handler(struct bfd_session *bs, int nstate)
{
switch (nstate) {
case PTM_BFD_ADM_DOWN:
bs_neighbour_admin_down_handler(bs, BD_ADMIN_DOWN);
break;
case PTM_BFD_DOWN:
/* Peer lost or asked to shutdown connection. */
ptm_bfd_sess_dn(bs, BD_NEIGHBOR_DOWN);

4
bfdd/bfd.h
View File

@ -365,7 +365,7 @@ TAILQ_HEAD(bcslist, bfd_control_socket);
int control_init(const char *path);
void control_shutdown(void);
int control_notify(struct bfd_session *bs);
int control_notify(struct bfd_session *bs, uint8_t notify_state);
int control_notify_config(const char *op, struct bfd_session *bs);
int control_accept(struct thread *t);
@ -628,7 +628,7 @@ void bfdd_sessions_enable_vrf(struct vrf *vrf);
void bfdd_sessions_disable_vrf(struct vrf *vrf);
void bfd_session_update_vrf_name(struct bfd_session *bs, struct vrf *vrf);
int ptm_bfd_notify(struct bfd_session *bs);
int ptm_bfd_notify(struct bfd_session *bs, uint8_t notify_state);
/*

4
bfdd/bfdd_northbound.c
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@ -431,7 +431,7 @@ static int bfdd_bfd_sessions_single_hop_administrative_down_modify(
/* Change and notify state change. */
bs->ses_state = PTM_BFD_DOWN;
control_notify(bs);
control_notify(bs, bs->ses_state);
/* Enable all timers. */
bfd_recvtimer_update(bs);
@ -454,7 +454,7 @@ static int bfdd_bfd_sessions_single_hop_administrative_down_modify(
/* Change and notify state change. */
bs->ses_state = PTM_BFD_ADM_DOWN;
control_notify(bs);
control_notify(bs, bs->ses_state);
ptm_bfd_snd(bs, 0);
}

4
bfdd/control.c
View File

@ -774,13 +774,13 @@ static void _control_notify(struct bfd_control_socket *bcs,
control_queue_enqueue(bcs, bcm);
}
int control_notify(struct bfd_session *bs)
int control_notify(struct bfd_session *bs, uint8_t notify_state)
{
struct bfd_control_socket *bcs;
struct bfd_notify_peer *bnp;
/* Notify zebra listeners as well. */
ptm_bfd_notify(bs);
ptm_bfd_notify(bs, notify_state);
/*
* PERFORMANCE: reuse the bfd_control_msg allocated data for

13
bfdd/ptm_adapter.c
View File

@ -153,7 +153,7 @@ static int _ptm_msg_address(struct stream *msg, int family, const void *addr)
return 0;
}
int ptm_bfd_notify(struct bfd_session *bs)
int ptm_bfd_notify(struct bfd_session *bs, uint8_t notify_state)
{
struct stream *msg;
@ -204,12 +204,15 @@ int ptm_bfd_notify(struct bfd_session *bs)
_ptm_msg_address(msg, bs->key.family, &bs->key.peer);
/* BFD status */
switch (bs->ses_state) {
switch (notify_state) {
case PTM_BFD_UP:
stream_putl(msg, BFD_STATUS_UP);
break;
case PTM_BFD_ADM_DOWN:
stream_putl(msg, BFD_STATUS_ADMIN_DOWN);
break;
case PTM_BFD_DOWN:
case PTM_BFD_INIT:
stream_putl(msg, BFD_STATUS_DOWN);
@ -432,7 +435,7 @@ static void bfdd_dest_register(struct stream *msg, vrf_id_t vrf_id)
return;
}
ptm_bfd_notify(bs);
ptm_bfd_notify(bs, bs->ses_state);
}
static void bfdd_dest_deregister(struct stream *msg, vrf_id_t vrf_id)
@ -461,6 +464,10 @@ static void bfdd_dest_deregister(struct stream *msg, vrf_id_t vrf_id)
if (bs->refcount ||
BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_CONFIG))
return;
bs->ses_state = PTM_BFD_ADM_DOWN;
ptm_bfd_snd(bs, 0);
ptm_bfd_sess_del(&bpc);
}

3
bgpd/bgp_bfd.c
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@ -282,7 +282,8 @@ static void bgp_bfd_peer_status_update(struct peer *peer, int status,
return;
old_status = bfd_info->status;
bfd_info->status = status;
BFD_SET_CLIENT_STATUS(bfd_info->status, status);
bfd_info->last_update = bgp_clock();
if (status != old_status) {

3
isisd/isis_bfd.c
View File

@ -118,7 +118,8 @@ static void bfd_adj_event(struct isis_adjacency *adj, struct prefix *dst,
int old_status = adj->bfd_session->status;
adj->bfd_session->status = new_status;
BFD_SET_CLIENT_STATUS(adj->bfd_session->status, new_status);
if (old_status == new_status)
return;

2
lib/bfd.c
View File

@ -315,6 +315,8 @@ const char *bfd_get_status_str(int status)
return "Down";
case BFD_STATUS_UP:
return "Up";
case BFD_STATUS_ADMIN_DOWN:
return "Admin Down";
case BFD_STATUS_UNKNOWN:
default:
return "Unknown";

14
lib/bfd.h
View File

@ -51,9 +51,17 @@ struct bfd_gbl {
#define BFD_FLAG_BFD_CBIT_ON (1 << 3) /* Peer registered with CBIT set to on */
#define BFD_FLAG_BFD_CHECK_CONTROLPLANE (1 << 4) /* BFD and controlplane daemon are linked */
#define BFD_STATUS_UNKNOWN (1 << 0) /* BFD session status never received */
#define BFD_STATUS_DOWN (1 << 1) /* BFD session status is down */
#define BFD_STATUS_UP (1 << 2) /* BFD session status is up */
#define BFD_STATUS_UNKNOWN (1 << 0) /* BFD session status never received */
#define BFD_STATUS_DOWN (1 << 1) /* BFD session status is down */
#define BFD_STATUS_UP (1 << 2) /* BFD session status is up */
#define BFD_STATUS_ADMIN_DOWN (1 << 3) /* BFD session is admin down */
#define BFD_SET_CLIENT_STATUS(current_status, new_status) \
do { \
(current_status) = \
(((new_status) == BFD_STATUS_ADMIN_DOWN) ? \
BFD_STATUS_DOWN : (new_status));\
} while (0)
enum bfd_sess_type {
BFD_TYPE_NOT_CONFIGURED,

2
ospf6d/ospf6_bfd.c
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@ -236,7 +236,7 @@ static int ospf6_bfd_interface_dest_update(ZAPI_CALLBACK_ARGS)
continue;
old_status = bfd_info->status;
bfd_info->status = status;
BFD_SET_CLIENT_STATUS(bfd_info->status, status);
monotime(&tv);
bfd_info->last_update = tv.tv_sec;

2
ospfd/ospf_bfd.c
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@ -240,7 +240,7 @@ static int ospf_bfd_interface_dest_update(ZAPI_CALLBACK_ARGS)
continue;
old_status = bfd_info->status;
bfd_info->status = status;
BFD_SET_CLIENT_STATUS(bfd_info->status, status);
monotime(&tv);
bfd_info->last_update = tv.tv_sec;

2
pimd/pim_bfd.c
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@ -270,7 +270,7 @@ static int pim_bfd_interface_dest_update(ZAPI_CALLBACK_ARGS)
continue;
}
old_status = bfd_info->status;
bfd_info->status = status;
BFD_SET_CLIENT_STATUS(bfd_info->status, status);
monotime(&tv);
bfd_info->last_update = tv.tv_sec;