svn commit: r204145 - head/sys/net

[Bjoern A. Zeeb]

Author: bz
Date: Sat Feb 20 22:09:48 2010
New Revision: 204145
URL: http://svn.freebsd.org/changeset/base/204145

Log:
  Start to implement ifnet DDB support:
  - 'show ifnets' prints a list of ifnet *s per virtual network stack,
  - 'show ifnet <struct ifnet *>' prints fields matching the given ifp.
  
  We do not yet print the complete set of fields and might want to
  factor this out to an extra if_debug.c file in case this grows
  a lot[1]. We may also want to grow 'show ifnet <if_xname>' support[1].
  
  Sponsored by:	ISPsystem
  Suggested by:	rwatson [1]
  Reviewed by:	rwatson
  MFC after:	5 days

Modified:
  head/sys/net/if.c

Modified: head/sys/net/if.c
==============================================================================
--- head/sys/net/if.c	Sat Feb 20 22:01:24 2010	(r204144)
+++ head/sys/net/if.c	Sat Feb 20 22:09:48 2010	(r204145)
@@ -34,6 +34,7 @@
 #include "opt_inet6.h"
 #include "opt_inet.h"
 #include "opt_carp.h"
+#include "opt_ddb.h"
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -62,6 +63,10 @@
 #include <machine/stdarg.h>
 #include <vm/uma.h>
 
+#ifdef DDB
+#include <ddb/ddb.h>
+#endif
+
 #include <net/if.h>
 #include <net/if_arp.h>
 #include <net/if_clone.h>
@@ -3331,3 +3336,79 @@ if_deregister_com_alloc(u_char type)
 	if_com_alloc[type] = NULL;
 	if_com_free[type] = NULL;
 }
+
+#ifdef DDB
+static void
+if_show_ifnet(struct ifnet *ifp)
+{
+
+	if (ifp == NULL)
+		return;
+	db_printf("%s:\n", ifp->if_xname);
+#define	IF_DB_PRINTF(f, e)	db_printf("   %s = " f "\n", #e, ifp->e);
+	IF_DB_PRINTF("%s", if_dname);
+	IF_DB_PRINTF("%d", if_dunit);
+	IF_DB_PRINTF("%s", if_description);
+	IF_DB_PRINTF("%u", if_index);
+	IF_DB_PRINTF("%u", if_refcount);
+	IF_DB_PRINTF("%d", if_index_reserved);
+	IF_DB_PRINTF("%p", if_softc);
+	IF_DB_PRINTF("%p", if_l2com);
+	IF_DB_PRINTF("%p", if_vnet);
+	IF_DB_PRINTF("%p", if_home_vnet);
+	IF_DB_PRINTF("%p", if_addr);
+	IF_DB_PRINTF("%p", if_llsoftc);
+	IF_DB_PRINTF("%p", if_label);
+	IF_DB_PRINTF("%u", if_pcount);
+	IF_DB_PRINTF("0x%08x", if_flags);
+	IF_DB_PRINTF("0x%08x", if_drv_flags);
+	IF_DB_PRINTF("0x%08x", if_capabilities);
+	IF_DB_PRINTF("0x%08x", if_capenable);
+	IF_DB_PRINTF("%p", if_snd.ifq_head);
+	IF_DB_PRINTF("%p", if_snd.ifq_tail);
+	IF_DB_PRINTF("%d", if_snd.ifq_len);
+	IF_DB_PRINTF("%d", if_snd.ifq_maxlen);
+	IF_DB_PRINTF("%d", if_snd.ifq_drops);
+	IF_DB_PRINTF("%p", if_snd.ifq_drv_head);
+	IF_DB_PRINTF("%p", if_snd.ifq_drv_tail);
+	IF_DB_PRINTF("%d", if_snd.ifq_drv_len);
+	IF_DB_PRINTF("%d", if_snd.ifq_drv_maxlen);
+	IF_DB_PRINTF("%d", if_snd.altq_type);
+	IF_DB_PRINTF("%x", if_snd.altq_flags);
+#undef IF_DB_PRINTF
+}
+
+DB_SHOW_COMMAND(ifnet, db_show_ifnet)
+{
+
+	if (!have_addr) {
+		db_printf("usage: show ifnet <struct ifnet *>\n");
+		return;
+	}
+
+	if_show_ifnet((struct ifnet *)addr);
+}
+
+DB_SHOW_COMMAND(ifnets, db_show_ifnets)
+{
+	VNET_ITERATOR_DECL(vnet_iter);
+	struct ifnet *ifp;
+	u_short idx;
+
+	VNET_FOREACH(vnet_iter) {
+		CURVNET_SET_QUIET(vnet_iter);
+#ifdef VIMAGE
+		db_printf("vnet=%p\n", curvnet);
+#endif
+		for (idx = 1; idx <= V_if_index; idx++) {
+			ifp = V_ifindex_table[idx].ife_ifnet;
+			if (ifp == NULL)
+				continue;
+			db_printf( "%20s ifp=%p\n", ifp->if_xname, ifp);
+			if (db_pager_quit)
+				break;
+		}
+		CURVNET_RESTORE();
+	}
+}
+#endif