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simplify locking in find_pfxlist_reachable_router

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This commit is contained in:
Kip Macy 2008-12-16 03:05:18 +00:00
parent 86cd829d64
commit d78be3a909
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=186162
1 changed files with 9 additions and 8 deletions
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17
sys/netinet6/nd6_rtr.c
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@ -1329,19 +1329,20 @@ find_pfxlist_reachable_router(struct nd_prefix *pr)
{
struct nd_pfxrouter *pfxrtr;
struct llentry *ln;
int canreach;
for (pfxrtr = LIST_FIRST(&pr->ndpr_advrtrs); pfxrtr;
pfxrtr = LIST_NEXT(pfxrtr, pfr_entry)) {
IF_AFDATA_LOCK(pfxrtr->router->ifp);
if (((ln = nd6_lookup(&pfxrtr->router->rtaddr, 0,
pfxrtr->router->ifp)) != NULL) &&
ND6_IS_LLINFO_PROBREACH(ln)) {
LLE_RUNLOCK(ln);
break; /* found */
}
if (ln != NULL)
LLE_RUNLOCK(ln);
ln = nd6_lookup(&pfxrtr->router->rtaddr, 0, pfxrtr->router->ifp);
IF_AFDATA_UNLOCK(pfxrtr->router->ifp);
canreach = 0;
if (ln != NULL) {
canreach = ND6_IS_LLINFO_PROBREACH(ln);
LLE_RUNLOCK(ln);
}
if (canreach)
break;
}
return (pfxrtr);
}