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authorMartin KaFai Lau <kafai@fb.com>2017-06-05 12:15:53 -0700
committerDavid S. Miller <davem@davemloft.net>2017-06-06 15:41:24 -0400
commit95b9afd3987f91c09151158279e165276a95c597 (patch)
treef71901b7ceeebc924ad0c68184f4cd4f96511c7c /tools/lib
parent1e270976908686ec25fb91b8a34145be54137976 (diff)
downloadop-kernel-dev-95b9afd3987f91c09151158279e165276a95c597.zip
op-kernel-dev-95b9afd3987f91c09151158279e165276a95c597.tar.gz
bpf: Test for bpf ID
Add test to exercise the bpf_prog/map id generation, bpf_(prog|map)_get_next_id(), bpf_(prog|map)_get_fd_by_id() and bpf_get_obj_info_by_fd(). Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Alexei Starovoitov <ast@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/bpf/bpf.c68
-rw-r--r--tools/lib/bpf/bpf.h5
2 files changed, 73 insertions, 0 deletions
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 6e17898..7e0405e 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -257,3 +257,71 @@ int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
*duration = attr.test.duration;
return ret;
}
+
+int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id)
+{
+ union bpf_attr attr;
+ int err;
+
+ bzero(&attr, sizeof(attr));
+ attr.start_id = start_id;
+
+ err = sys_bpf(BPF_PROG_GET_NEXT_ID, &attr, sizeof(attr));
+ if (!err)
+ *next_id = attr.next_id;
+
+ return err;
+}
+
+int bpf_map_get_next_id(__u32 start_id, __u32 *next_id)
+{
+ union bpf_attr attr;
+ int err;
+
+ bzero(&attr, sizeof(attr));
+ attr.start_id = start_id;
+
+ err = sys_bpf(BPF_MAP_GET_NEXT_ID, &attr, sizeof(attr));
+ if (!err)
+ *next_id = attr.next_id;
+
+ return err;
+}
+
+int bpf_prog_get_fd_by_id(__u32 id)
+{
+ union bpf_attr attr;
+
+ bzero(&attr, sizeof(attr));
+ attr.prog_id = id;
+
+ return sys_bpf(BPF_PROG_GET_FD_BY_ID, &attr, sizeof(attr));
+}
+
+int bpf_map_get_fd_by_id(__u32 id)
+{
+ union bpf_attr attr;
+
+ bzero(&attr, sizeof(attr));
+ attr.map_id = id;
+
+ return sys_bpf(BPF_MAP_GET_FD_BY_ID, &attr, sizeof(attr));
+}
+
+int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len)
+{
+ union bpf_attr attr;
+ int err;
+
+ bzero(&attr, sizeof(attr));
+ bzero(info, *info_len);
+ attr.info.bpf_fd = prog_fd;
+ attr.info.info_len = *info_len;
+ attr.info.info = ptr_to_u64(info);
+
+ err = sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr));
+ if (!err)
+ *info_len = attr.info.info_len;
+
+ return err;
+}
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 972bd83..16de44a 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -54,5 +54,10 @@ int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
void *data_out, __u32 *size_out, __u32 *retval,
__u32 *duration);
+int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);
+int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
+int bpf_prog_get_fd_by_id(__u32 id);
+int bpf_map_get_fd_by_id(__u32 id);
+int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len);
#endif
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