Signed-off-by: Vinson Lee <vlee@xxxxxxxxxxxxxxx>
---
configure | 1 +
syscalls/bpf.c | 14 ++++++++++++++
2 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/configure b/configure
index 8d95929..ca37e4e 100755
--- a/configure
+++ b/configure
@@ -239,6 +239,7 @@ check_header execinfo.h USE_BACKTRACE
check_header netatalk/at.h USE_APPLETALK
check_header netrom/netrom.h USE_NETROM
check_header netrose/rose.h USE_ROSE
+check_header linux/bpf.h USE_BPF
rm -f "$TMP" "$TMP.log" "$TMP.c"
diff --git a/syscalls/bpf.c b/syscalls/bpf.c
index b2f57d3..4788082 100644
--- a/syscalls/bpf.c
+++ b/syscalls/bpf.c
@@ -1,13 +1,16 @@
/*
* SYSCALL_DEFINE3(bpf, int, cmd, union bpf_attr __user *, uattr, unsigned int, size)
*/
+#ifdef USE_BPF
#include <linux/bpf.h>
+#endif
#include <linux/filter.h>
#include "arch.h"
#include "net.h"
#include "random.h"
#include "sanitise.h"
+#ifdef USE_BPF
static unsigned long bpf_prog_types[] = {
BPF_PROG_TYPE_UNSPEC,
BPF_PROG_TYPE_SOCKET_FILTER,
@@ -15,9 +18,11 @@ static unsigned long bpf_prog_types[] = {
BPF_PROG_TYPE_SCHED_CLS,
BPF_PROG_TYPE_SCHED_ACT,
};
+#endif
static const char license[] = "GPLv2";
+#ifdef USE_BPF
static void bpf_prog_load(struct syscallrecord *rec)
{
unsigned long *insns = NULL, len = 0;
@@ -49,18 +54,22 @@ static void bpf_prog_load(struct syscallrecord *rec)
rec->a2 = (unsigned long) attr;
rec->a3 = sizeof(attr);
}
+#endif
static void sanitise_bpf(struct syscallrecord *rec)
{
switch (rec->a1) {
+#ifdef USE_BPF
case BPF_PROG_LOAD:
bpf_prog_load(rec);
break;
+#endif
default:
break;
}
}
+#ifdef USE_BPF
static void post_bpf(struct syscallrecord *rec)
{
union bpf_attr *attr;
@@ -84,10 +93,15 @@ static void post_bpf(struct syscallrecord *rec)
break;
}
}
+#else
+static void post_bpf(__unused__ struct syscallrecord *rec) { }
+#endif
static unsigned long bpf_flags[] = {
+#ifdef USE_BPF
BPF_MAP_CREATE, BPF_MAP_LOOKUP_ELEM, BPF_MAP_UPDATE_ELEM, BPF_MAP_DELETE_ELEM,
BPF_MAP_GET_NEXT_KEY, BPF_PROG_LOAD,
+#endif
};
struct syscallentry syscall_bpf = {
--
1.7.1
--
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