svn commit: r203727 - head/sys/net
Bjoern A. Zeeb
bz at FreeBSD.org
Tue Feb 9 22:15:59 UTC 2010
Author: bz
Date: Tue Feb 9 22:15:59 2010
New Revision: 203727
URL: http://svn.freebsd.org/changeset/base/203727
Log:
Add an SDT provider for "vnet"s along with probes for vnet_alloc
and vnet_destroy.
Use the line number rather than NULL as dummy argument.
Note: the fbt provider does not reliably provide :return probes
(depending on optimization levels used at compile time) making
it unusable for scripts to generate complete call-traces with
well defined boundaries over allocations or destructions of
virtual network stacks.
Sponsored by: ISPsystem
MFC After: 8 days
Modified:
head/sys/net/vnet.c
Modified: head/sys/net/vnet.c
==============================================================================
--- head/sys/net/vnet.c Tue Feb 9 22:05:30 2010 (r203726)
+++ head/sys/net/vnet.c Tue Feb 9 22:15:59 2010 (r203727)
@@ -38,11 +38,13 @@ __FBSDID("$FreeBSD$");
#include "opt_ddb.h"
#include "opt_kdb.h"
+#include "opt_kdtrace.h"
#include <sys/param.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/jail.h>
+#include <sys/sdt.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/linker_set.h>
@@ -210,6 +212,13 @@ static TAILQ_HEAD(, vnet_data_free) vnet
TAILQ_HEAD_INITIALIZER(vnet_data_free_head);
static struct sx vnet_data_free_lock;
+SDT_PROVIDER_DEFINE(vnet);
+SDT_PROBE_DEFINE1(vnet, functions, vnet_alloc, entry, "int");
+SDT_PROBE_DEFINE2(vnet, functions, vnet_alloc, alloc, "int", "struct vnet *");
+SDT_PROBE_DEFINE2(vnet, functions, vnet_alloc, return, "int", "struct vnet *");
+SDT_PROBE_DEFINE2(vnet, functions, vnet_destroy, entry, "int", "struct vnet *");
+SDT_PROBE_DEFINE1(vnet, functions, vnet_destroy, return, "int");
+
/*
* Allocate a virtual network stack.
*/
@@ -218,8 +227,10 @@ vnet_alloc(void)
{
struct vnet *vnet;
+ SDT_PROBE1(vnet, functions, vnet_alloc, entry, __LINE__);
vnet = malloc(sizeof(struct vnet), M_VNET, M_WAITOK | M_ZERO);
vnet->vnet_magic_n = VNET_MAGIC_N;
+ SDT_PROBE2(vnet, functions, vnet_alloc, alloc, __LINE__, vnet);
/*
* Allocate storage for virtualized global variables and copy in
@@ -244,6 +255,7 @@ vnet_alloc(void)
LIST_INSERT_HEAD(&vnet_head, vnet, vnet_le);
VNET_LIST_WUNLOCK();
+ SDT_PROBE2(vnet, functions, vnet_alloc, return, __LINE__, vnet);
return (vnet);
}
@@ -255,6 +267,7 @@ vnet_destroy(struct vnet *vnet)
{
struct ifnet *ifp, *nifp;
+ SDT_PROBE2(vnet, functions, vnet_destroy, entry, __LINE__, vnet);
KASSERT(vnet->vnet_sockcnt == 0,
("%s: vnet still has sockets", __func__));
@@ -281,6 +294,7 @@ vnet_destroy(struct vnet *vnet)
vnet->vnet_data_base = 0;
vnet->vnet_magic_n = 0xdeadbeef;
free(vnet, M_VNET);
+ SDT_PROBE1(vnet, functions, vnet_destroy, return, __LINE__);
}
/*
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