Author: kmacy
Date: Thu Apr 16 22:04:07 2009
New Revision: 191154
URL: http://svn.freebsd.org/changeset/base/191154
Log:
add utility routine for updating an struct llentry *
Modified:
head/sys/net/if_llatbl.c
head/sys/net/if_llatbl.h
Modified: head/sys/net/if_llatbl.c
==============================================================================
--- head/sys/net/if_llatbl.c Thu Apr 16 21:59:45 2009 (r191153)
+++ head/sys/net/if_llatbl.c Thu Apr 16 22:04:07 2009 (r191154)
@@ -103,6 +103,39 @@ llentry_free(struct llentry *lle)
LLE_FREE_LOCKED(lle);
}
+int
+llentry_update(struct llentry **llep, struct lltable *lt,
+ struct sockaddr *dst, struct ifnet *ifp)
+{
+ struct llentry *la;
+
+ IF_AFDATA_RLOCK(ifp);
+ la = lla_lookup(lt, LLE_EXCLUSIVE,
+ (struct sockaddr *)dst);
+ IF_AFDATA_RUNLOCK(ifp);
+ if ((la == NULL) &&
+ (ifp->if_flags & (IFF_NOARP | IFF_STATICARP)) == 0) {
+ IF_AFDATA_WLOCK(ifp);
+ la = lla_lookup(lt,
+ (LLE_CREATE | LLE_EXCLUSIVE),
+ (struct sockaddr *)dst);
+ IF_AFDATA_WUNLOCK(ifp);
+ }
+ if (la != NULL && (*llep != la)) {
+ if (*llep != NULL)
+ LLE_FREE(*llep);
+ LLE_ADDREF(la);
+ LLE_WUNLOCK(la);
+ *llep = la;
+ } else if (la != NULL)
+ LLE_WUNLOCK(la);
+
+ if (la == NULL)
+ return (ENOENT);
+
+ return (0);
+}
+
/*
* Free all entries from given table and free itself.
* Since lltables collects from all of the intefaces,
Modified: head/sys/net/if_llatbl.h
==============================================================================
--- head/sys/net/if_llatbl.h Thu Apr 16 21:59:45 2009 (r191153)
+++ head/sys/net/if_llatbl.h Thu Apr 16 22:04:07 2009 (r191154)
@@ -178,6 +178,8 @@ void lltable_drain(int);
int lltable_sysctl_dumparp(int, struct sysctl_req *);
void llentry_free(struct llentry *);
+int llentry_update(struct llentry **, struct lltable *,
+ struct sockaddr *, struct ifnet *);
/*
* Generic link layer address lookup function.
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