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Merge pull request #12670 from louis-6wind/fix-bfd-zclient

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lib: do not reopen a zclient socket for bfd
This commit is contained in:
Rafael Zalamena 2023-01-24 16:52:54 -03:00 committed by GitHub
commit 21188a567a
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 15 additions and 90 deletions
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95
lib/bfd.c
View File

@ -129,8 +129,6 @@ struct bfd_sessions_global {
struct thread_master *tm;
/** Pointer to zebra client data structure. */
struct zclient *zc;
/** Zebra next hop tracking (NHT) client. */
struct zclient *nht_zclient;
/** Debugging state. */
bool debugging;
@ -147,31 +145,10 @@ static const struct in6_addr i6a_zero;
/*
* Prototypes
*/
static void bfd_nht_zclient_connect(struct thread *thread);
static void bfd_nht_zclient_connected(struct zclient *zclient);
static int bfd_nht_update(ZAPI_CALLBACK_ARGS);
static void bfd_source_cache_get(struct bfd_session_params *session);
static void bfd_source_cache_put(struct bfd_session_params *session);
static inline void
bfd_source_cache_register(const struct bfd_source_cache *source)
{
zclient_send_rnh(bsglobal.nht_zclient, ZEBRA_NEXTHOP_REGISTER,
&source->address, SAFI_UNICAST, false, false,
source->vrf_id);
}
static inline void
bfd_source_cache_unregister(const struct bfd_source_cache *source)
{
zclient_send_rnh(bsglobal.nht_zclient, ZEBRA_NEXTHOP_UNREGISTER,
&source->address, SAFI_UNICAST, false, false,
source->vrf_id);
}
/*
* bfd_get_peer_info - Extract the Peer information for which the BFD session
* went down from the message sent from Zebra to clients.
@ -1074,20 +1051,11 @@ static int bfd_protocol_integration_finish(void)
if (!SLIST_EMPTY(&bsglobal.source_list))
zlog_warn("BFD integration source cache not empty");
zclient_stop(bsglobal.nht_zclient);
zclient_free(bsglobal.nht_zclient);
return 0;
}
static zclient_handler *const bfd_nht_handlers[] = {
[ZEBRA_NEXTHOP_UPDATE] = bfd_nht_update,
};
void bfd_protocol_integration_init(struct zclient *zc, struct thread_master *tm)
{
struct zclient_options bfd_nht_options = zclient_options_default;
/* Initialize data structure. */
TAILQ_INIT(&bsglobal.bsplist);
SLIST_INIT(&bsglobal.source_list);
@ -1102,16 +1070,6 @@ void bfd_protocol_integration_init(struct zclient *zc, struct thread_master *tm)
/* Send the client registration */
bfd_client_sendmsg(zc, ZEBRA_BFD_CLIENT_REGISTER, VRF_DEFAULT);
/* Start NHT client (for automatic source decisions). */
bsglobal.nht_zclient =
zclient_new(tm, &bfd_nht_options, bfd_nht_handlers,
array_size(bfd_nht_handlers));
bsglobal.nht_zclient->sock = -1;
bsglobal.nht_zclient->privs = zc->privs;
bsglobal.nht_zclient->zebra_connected = bfd_nht_zclient_connected;
thread_add_timer(tm, bfd_nht_zclient_connect, bsglobal.nht_zclient, 1,
&bsglobal.nht_zclient->t_connect);
hook_register(frr_fini, bfd_protocol_integration_finish);
}
@ -1252,8 +1210,6 @@ static void bfd_source_cache_get(struct bfd_session_params *session)
session->source_cache = source;
source->refcount = 1;
bfd_source_cache_register(source);
return;
}
@ -1268,7 +1224,6 @@ static void bfd_source_cache_put(struct bfd_session_params *session)
return;
}
bfd_source_cache_unregister(session->source_cache);
SLIST_REMOVE(&bsglobal.source_list, session->source_cache,
bfd_source_cache, entry);
XFREE(MTYPE_BFD_SOURCE, session->source_cache);
@ -1378,59 +1333,19 @@ static bool bfd_source_cache_update(struct bfd_source_cache *source,
return false;
}
static void bfd_nht_zclient_connect(struct thread *thread)
{
struct zclient *zclient = THREAD_ARG(thread);
if (bsglobal.debugging)
zlog_debug("BFD NHT zclient connection attempt");
if (zclient_start(zclient) == -1) {
if (bsglobal.debugging)
zlog_debug("BFD NHT zclient connection failed");
thread_add_timer(bsglobal.tm, bfd_nht_zclient_connect, zclient,
3, &zclient->t_connect);
return;
}
if (bsglobal.debugging)
zlog_debug("BFD NHT zclient connection succeeded");
}
static void bfd_nht_zclient_connected(struct zclient *zclient)
int bfd_nht_update(const struct prefix *match, const struct zapi_route *route)
{
struct bfd_source_cache *source;
if (bsglobal.debugging)
zlog_debug("BFD NHT zclient connected");
SLIST_FOREACH (source, &bsglobal.source_list, entry)
bfd_source_cache_register(source);
}
static int bfd_nht_update(ZAPI_CALLBACK_ARGS)
{
struct bfd_source_cache *source;
struct zapi_route route;
struct prefix match;
if (!zapi_nexthop_update_decode(zclient->ibuf, &match, &route)) {
zlog_warn("BFD NHT update decode failure");
return 0;
}
if (cmd != ZEBRA_NEXTHOP_UPDATE)
return 0;
if (bsglobal.debugging)
zlog_debug("BFD NHT update for %pFX", &route.prefix);
zlog_debug("BFD NHT update for %pFX", &route->prefix);
SLIST_FOREACH (source, &bsglobal.source_list, entry) {
if (source->vrf_id != route.vrf_id)
if (source->vrf_id != route->vrf_id)
continue;
if (!prefix_same(&match, &source->address))
if (!prefix_same(match, &source->address))
continue;
if (bfd_source_cache_update(source, &route))
if (bfd_source_cache_update(source, route))
bfd_source_cache_update_sessions(source);
}

7
lib/bfd.h
View File

@ -473,6 +473,13 @@ extern bool bfd_protocol_integration_debug(void);
*/
extern bool bfd_protocol_integration_shutting_down(void);
/* Update nexthop-tracking (nht) information for BFD auto source selection.
* The function must be called from the daemon callback function
* that deals with the ZEBRA_NEXTHOP_UPDATE zclient command
*/
extern int bfd_nht_update(const struct prefix *match,
const struct zapi_route *route);
#ifdef __cplusplus
}
#endif

3
staticd/static_zebra.c
View File

@ -211,6 +211,9 @@ static int static_zebra_nexthop_update(ZAPI_CALLBACK_ARGS)
return 1;
}
if (zclient->bfd_integration)
bfd_nht_update(&matched, &nhr);
if (matched.family == AF_INET6)
afi = AFI_IP6;