diff options
author | bz <bz@FreeBSD.org> | 2010-02-09 22:15:59 +0000 |
---|---|---|
committer | bz <bz@FreeBSD.org> | 2010-02-09 22:15:59 +0000 |
commit | eb28e347bf550058149b7d43646514104407e262 (patch) | |
tree | 370d7375ab7b5e0ea04904954f6e467afab2eb9b /sys/net/vnet.c | |
parent | 0cce20af31776cb050db64c456b22ed40e917206 (diff) | |
download | FreeBSD-src-eb28e347bf550058149b7d43646514104407e262.zip FreeBSD-src-eb28e347bf550058149b7d43646514104407e262.tar.gz |
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
Diffstat (limited to 'sys/net/vnet.c')
-rw-r--r-- | sys/net/vnet.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sys/net/vnet.c b/sys/net/vnet.c index 26635db..fe8df65 100644 --- a/sys/net/vnet.c +++ b/sys/net/vnet.c @@ -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_data_free_head = 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__); } /* |