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pimd: fixup JD macro to use "peer-msdp-sa" check instead of I_am_RP check

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JD macro is defined by the RFC as -
bool JoinDesired(S,G) {
    return (immediate_olist(S,G) != NULL
        OR (KeepaliveTimer(S,G) is running
        AND inherited_olist(S,G) != NULL))
}

However for MSDP synced SA the KAT will not be running so an exception is
needed. Earlier I had done this by relaxing KAT_run requirements entirely
on the RP. However as that prevents the source from being aged out in some
cases I have made the check more narrow i.e. has to an MSDP peer added
entry.

Ticket: CM-24398

Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
This commit is contained in:
Anuradha Karuppiah 2019-11-15 12:22:27 -08:00
parent c5cdf06960
commit 41a115e4f0
2 changed files with 22 additions and 2 deletions
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7
pimd/pim_msdp.c
View File

@ -126,7 +126,12 @@ static void pim_msdp_sa_upstream_del(struct pim_msdp_sa *sa)
if (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags)) {
PIM_UPSTREAM_FLAG_UNSET_SRC_MSDP(up->flags);
sa->flags |= PIM_MSDP_SAF_UP_DEL_IN_PROG;
pim_upstream_del(sa->pim, up, __PRETTY_FUNCTION__);
up = pim_upstream_del(sa->pim, up, __PRETTY_FUNCTION__);
/* re-eval joinDesired; clearing peer-msdp-sa flag can
* cause JD to change
*/
if (up)
pim_upstream_update_join_desired(sa->pim, up);
sa->flags &= ~PIM_MSDP_SAF_UP_DEL_IN_PROG;
}

17
pimd/pim_upstream.c
View File

@ -933,6 +933,15 @@ void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name)
pim_upstream_update_use_rpt(up, true /*update_mroute*/);
}
/* re-eval joinDesired; clearing peer-msdp-sa flag can
* cause JD to change
*/
if (!PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags) &&
PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(flags)) {
PIM_UPSTREAM_FLAG_SET_SRC_MSDP(up->flags);
pim_upstream_update_join_desired(up->pim, up);
}
up->flags |= flags;
++up->ref_count;
if (PIM_DEBUG_PIM_TRACE)
@ -1073,6 +1082,12 @@ static bool pim_upstream_empty_immediate_olist(struct pim_instance *pim,
return true;
}
static inline bool pim_upstream_is_msdp_peer_sa(struct pim_upstream *up)
{
return PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags);
}
/*
* bool JoinDesired(*,G) {
* if (immediate_olist(*,G) != NULL)
@ -1105,7 +1120,7 @@ int pim_upstream_evaluate_join_desired(struct pim_instance *pim,
empty_inh_oil = pim_upstream_empty_inherited_olist(up);
if (!empty_inh_oil &&
(pim_upstream_is_kat_running(up) ||
I_am_RP(pim, up->sg.grp)))
pim_upstream_is_msdp_peer_sa(up)))
return true;
return false;