Add ddb support to the "new" link layer code ("new-arp"):

 - show all lltables [1] (optional flag to also show the llentries as well)
 - show lltable <struct lltable *>
 - show llentry <struct llentry *>

MFC after:	6 days

1 files changed, 136 insertions, 0 deletions

diff --git a/sys/net/if_llatbl.c b/sys/net/if_llatbl.c
index f52f9ff..f934af5 100644
--- a/sys/net/if_llatbl.c
+++ b/sys/net/if_llatbl.c
@@ -27,6 +27,7 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include "opt_ddb.h"
 #include "opt_inet.h"
 #include "opt_inet6.h"
 
@@ -42,6 +43,10 @@ __FBSDID("$FreeBSD$");
 #include <sys/mutex.h>
 #include <sys/rwlock.h>
 
+#ifdef DDB
+#include <ddb/ddb.h>
+#endif
+
 #include <vm/uma.h>
 
 #include <netinet/in.h>
@@ -382,3 +387,134 @@ vnet_lltable_init()
 VNET_SYSINIT(vnet_lltable_init, SI_SUB_PSEUDO, SI_ORDER_FIRST,
     vnet_lltable_init, NULL);
 
+#ifdef DDB
+struct llentry_sa {
+	struct llentry		base;
+	struct sockaddr		l3_addr;
+};
+
+static void
+llatbl_lle_show(struct llentry_sa *la)
+{
+	struct llentry *lle;
+	uint8_t octet[6];
+
+	lle = &la->base;
+	db_printf("lle=%p\n", lle);
+	db_printf(" lle_next=%p\n", lle->lle_next.le_next);
+	db_printf(" lle_lock=%p\n", &lle->lle_lock);
+	db_printf(" lle_tbl=%p\n", lle->lle_tbl);
+	db_printf(" lle_head=%p\n", lle->lle_head);
+	db_printf(" la_hold=%p\n", lle->la_hold);
+	db_printf(" la_expire=%ju\n", (uintmax_t)lle->la_expire);
+	db_printf(" la_flags=0x%04x\n", lle->la_flags);
+	db_printf(" la_asked=%u\n", lle->la_asked);
+	db_printf(" la_preempt=%u\n", lle->la_preempt);
+	db_printf(" ln_byhint=%u\n", lle->ln_byhint);
+	db_printf(" ln_state=%d\n", lle->ln_state);
+	db_printf(" ln_router=%u\n", lle->ln_router);
+	db_printf(" ln_ntick=%ju\n", (uintmax_t)lle->ln_ntick);
+	db_printf(" lle_refcnt=%d\n", lle->lle_refcnt);
+	bcopy(&lle->ll_addr.mac16, octet, sizeof(octet));
+	db_printf(" ll_addr=%02x:%02x:%02x:%02x:%02x:%02x\n",
+	    octet[0], octet[1], octet[2], octet[3], octet[4], octet[5]);
+	db_printf(" la_timer=%p\n", &lle->la_timer);
+
+	switch (la->l3_addr.sa_family) {
+#ifdef INET
+	case AF_INET:
+	{
+		struct sockaddr_in *sin;
+		char l3s[INET_ADDRSTRLEN];
+
+		sin = (struct sockaddr_in *)&la->l3_addr;
+		inet_ntoa_r(sin->sin_addr, l3s);
+		db_printf(" l3_addr=%s\n", l3s);	
+		break;
+	}
+#endif
+#ifdef INET6
+	case AF_INET6:
+	{
+		struct sockaddr_in6 *sin6;
+		char l3s[INET6_ADDRSTRLEN];
+
+		sin6 = (struct sockaddr_in6 *)&la->l3_addr;
+		ip6_sprintf(l3s, &sin6->sin6_addr);
+		db_printf(" l3_addr=%s\n", l3s);	
+		break;
+	}
+#endif
+	default:
+		db_printf(" l3_addr=N/A (af=%d)\n", la->l3_addr.sa_family);
+		break;
+	}
+}
+
+DB_SHOW_COMMAND(llentry, db_show_llentry)
+{
+
+	if (!have_addr) {
+		db_printf("usage: show llentry <struct llentry *>\n");
+		return;
+	}
+
+	llatbl_lle_show((struct llentry_sa *)addr);
+}
+
+static void
+llatbl_llt_show(struct lltable *llt)
+{
+	int i;
+	struct llentry *lle;
+
+	db_printf("llt=%p llt_af=%d llt_ifp=%p\n",
+	    llt, llt->llt_af, llt->llt_ifp);
+
+	for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
+		LIST_FOREACH(lle, &llt->lle_head[i], lle_next) {
+
+			llatbl_lle_show((struct llentry_sa *)lle);
+			if (db_pager_quit)
+				return;
+		}
+	}
+}
+
+DB_SHOW_COMMAND(lltable, db_show_lltable)
+{
+
+	if (!have_addr) {
+		db_printf("usage: show lltable <struct lltable *>\n");
+		return;
+	}
+
+	llatbl_llt_show((struct lltable *)addr);
+}
+
+DB_SHOW_ALL_COMMAND(lltables, db_show_all_lltables)
+{
+	VNET_ITERATOR_DECL(vnet_iter);
+	struct lltable *llt;
+
+	VNET_FOREACH(vnet_iter) {
+		CURVNET_SET_QUIET(vnet_iter);
+#ifdef VIMAGE
+		db_printf("vnet=%p\n", curvnet);
+#endif
+		SLIST_FOREACH(llt, &V_lltables, llt_link) {
+			db_printf("llt=%p llt_af=%d llt_ifp=%p(%s)\n",
+			    llt, llt->llt_af, llt->llt_ifp,
+			    (llt->llt_ifp != NULL) ?
+				llt->llt_ifp->if_xname : "?");
+			if (have_addr && addr != 0) /* verbose */
+				llatbl_llt_show(llt);
+			if (db_pager_quit) {
+				CURVNET_RESTORE();
+				return;
+			}
+		}
+		CURVNET_RESTORE();
+	}
+}
+#endif