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bgpd: Advertise FIB installed routes to bgp peers (Part 2)

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* Added CLI command "[no] bgp suppress-fib-pending" to enable and
  disable suppress-fib-pending
* Send ZEBRA_ROUTE_NOTIFY_REQUEST to zebra when "bgp suppress-fib-pending"
  is enabled or disabled
* Define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME which is the delay added
  to update group timer.
* Added error codes

Signed-off-by: kssoman <somanks@gmail.com>
This commit is contained in:
Soman K S 2020-11-06 08:46:04 +05:30
parent 77b38a4a7d
commit c208c58670
5 changed files with 87 additions and 3 deletions
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12
bgpd/bgp_errors.c
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@ -462,6 +462,18 @@ static struct log_ref ferr_bgp_err[] = {
.description = "As part of normal collision detection for opening a connection to a peer, BGP has detected that the remote peer's router-id is the same as ours",
.suggestion = "Change one of the two router-id's",
},
{
.code = EC_BGP_INVALID_BGP_INSTANCE,
.title = "BGP instance for the specifc vrf is invalid",
.description = "Indicates that specified bgp instance is NULL",
.suggestion = "Get log files from router and open an issue",
},
{
.code = EC_BGP_INVALID_ROUTE,
.title = "BGP route node is invalid",
.description = "BGP route for the specified AFI/SAFI is NULL",
.suggestion = "Get log files from router and open an issue",
},
{
.code = END_FERR,
}

2
bgpd/bgp_errors.h
View File

@ -99,6 +99,8 @@ enum bgp_log_refs {
EC_BGP_INVALID_NEXTHOP_LENGTH,
EC_BGP_DOPPELGANGER_CONFIG,
EC_BGP_ROUTER_ID_SAME,
EC_BGP_INVALID_BGP_INSTANCE,
EC_BGP_INVALID_ROUTE,
};
extern void bgp_error_init(void);

21
bgpd/bgp_vty.c
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@ -1514,6 +1514,20 @@ void cli_show_router_bgp_router_id(struct vty *vty, struct lyd_node *dnode,
vty_out(vty, " bgp router-id %s\n", yang_dnode_get_string(dnode, NULL));
}
DEFPY (bgp_suppress_fib_pending,
bgp_suppress_fib_pending_cmd,
"[no] bgp suppress-fib-pending",
NO_STR
BGP_STR
"Advertise only routes that are programmed in kernel to peers\n")
{
VTY_DECLVAR_CONTEXT(bgp, bgp);
bgp_suppress_fib_pending_set(bgp, !no);
return CMD_SUCCESS;
}
/* BGP Cluster ID. */
DEFUN_YANG(bgp_cluster_id,
bgp_cluster_id_cmd,
@ -16856,6 +16870,10 @@ int bgp_config_write(struct vty *vty)
vty_out(vty, " bgp router-id %pI4\n",
&bgp->router_id_static);
/* Suppress fib pending */
if (CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING))
vty_out(vty, " bgp suppress-fib-pending\n");
/* BGP log-neighbor-changes. */
if (!!CHECK_FLAG(bgp->flags, BGP_FLAG_LOG_NEIGHBOR_CHANGES)
!= SAVE_BGP_LOG_NEIGHBOR_CHANGES)
@ -17371,6 +17389,9 @@ void bgp_vty_init(void)
install_element(BGP_NODE, &bgp_router_id_cmd);
install_element(BGP_NODE, &no_bgp_router_id_cmd);
/* "bgp suppress-fib-pending" command */
install_element(BGP_NODE, &bgp_suppress_fib_pending_cmd);
/* "bgp cluster-id" commands. */
install_element(BGP_NODE, &bgp_cluster_id_cmd);
install_element(BGP_NODE, &no_bgp_cluster_id_cmd);

40
bgpd/bgpd.c
View File

@ -109,6 +109,9 @@ struct community_list_handler *bgp_clist;
unsigned int multipath_num = MULTIPATH_NUM;
/* Number of bgp instances configured for suppress fib config */
unsigned int bgp_suppress_fib_count;
static void bgp_if_finish(struct bgp *bgp);
static void peer_drop_dynamic_neighbor(struct peer *peer);
@ -390,6 +393,43 @@ void bgp_router_id_static_set(struct bgp *bgp, struct in_addr id)
true /* is config */);
}
/* Set the suppress fib pending for the bgp configuration */
void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set)
{
bool send_msg = false;
if (bgp->inst_type == BGP_INSTANCE_TYPE_VIEW)
return;
if (set) {
SET_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING);
/* Send msg to zebra for the first instance of bgp enabled
* with suppress fib
*/
if (bgp_suppress_fib_count == 0)
send_msg = true;
bgp_suppress_fib_count++;
} else {
UNSET_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING);
bgp_suppress_fib_count--;
/* Send msg to zebra if there are no instances enabled
* with suppress fib
*/
if (bgp_suppress_fib_count == 0)
send_msg = true;
}
/* Send route notify request to RIB */
if (send_msg) {
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("Sending ZEBRA_ROUTE_NOTIFY_REQUEST");
if (zclient)
zebra_route_notify_send(ZEBRA_ROUTE_NOTIFY_REQUEST,
zclient, set);
}
}
/* BGP's cluster-id control. */
int bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id)
{

15
bgpd/bgpd.h
View File

@ -455,11 +455,12 @@ struct bgp {
#define BGP_FLAG_DELETE_IN_PROGRESS (1 << 22)
#define BGP_FLAG_SELECT_DEFER_DISABLE (1 << 23)
#define BGP_FLAG_GR_DISABLE_EOR (1 << 24)
#define BGP_FLAG_EBGP_REQUIRES_POLICY (1 << 25)
#define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1 << 26)
#define BGP_FLAG_EBGP_REQUIRES_POLICY (1 << 25)
#define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1 << 26)
/* This flag is set if the instance is in administrative shutdown */
#define BGP_FLAG_SHUTDOWN (1 << 27)
#define BGP_FLAG_SHUTDOWN (1 << 27)
#define BGP_FLAG_SUPPRESS_FIB_PENDING (1 << 28)
enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
[BGP_GLOBAL_GR_EVENT_CMD];
@ -712,6 +713,9 @@ struct afi_safi_info {
#define BGP_SELECT_DEFER_DISABLE(bgp) \
(CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))
#define BGP_SUPPRESS_FIB_ENABLED(bgp) \
(CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING))
/* BGP peer-group support. */
struct peer_group {
/* Name of the peer-group. */
@ -1507,6 +1511,9 @@ DECLARE_QOBJ_TYPE(peer)
|| CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) \
|| CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN))
#define PEER_ROUTE_ADV_DELAY(peer) \
CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY)
#define PEER_PASSWORD_MINLEN (1)
#define PEER_PASSWORD_MAXLEN (80)
@ -1677,6 +1684,7 @@ struct bgp_nlri {
#define BGP_DEFAULT_STALEPATH_TIME 360
#define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
#define BGP_DEFAULT_RIB_STALE_TIME 500
#define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME 1
/* BGP uptime string length. */
#define BGP_UPTIME_LEN 25
@ -1853,6 +1861,7 @@ extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
extern void bgp_router_id_static_set(struct bgp *, struct in_addr);
extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
extern int bgp_cluster_id_set(struct bgp *, struct in_addr *);
extern int bgp_cluster_id_unset(struct bgp *);