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bpf: Add test for syscall on fd array/htab lookup

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Checks are added to the existing sockex3 and test_map_in_map test.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin KaFai Lau 2017-06-27 23:08:35 -07:00 committed by David S. Miller
parent 14dc6f04f4
commit a8744f2528
2 changed files with 31 additions and 1 deletions
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15
samples/bpf/sockex3_user.c
View file

@ -8,6 +8,10 @@
#include <arpa/inet.h> #include <arpa/inet.h>
#include <sys/resource.h> #include <sys/resource.h>
#define PARSE_IP 3
#define PARSE_IP_PROG_FD (prog_fd[0])
#define PROG_ARRAY_FD (map_fd[0])
struct bpf_flow_keys { struct bpf_flow_keys {
__be32 src; __be32 src;
__be32 dst; __be32 dst;
@ -28,7 +32,9 @@ int main(int argc, char **argv)
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
char filename[256]; char filename[256];
FILE *f; FILE *f;
int i, sock; int i, sock, err, id, key = PARSE_IP;
struct bpf_prog_info info = {};
uint32_t info_len = sizeof(info);
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
setrlimit(RLIMIT_MEMLOCK, &r); setrlimit(RLIMIT_MEMLOCK, &r);
@ -38,6 +44,13 @@ int main(int argc, char **argv)
return 1; return 1;
} }
/* Test fd array lookup which returns the id of the bpf_prog */
err = bpf_obj_get_info_by_fd(PARSE_IP_PROG_FD, &info, &info_len);
assert(!err);
err = bpf_map_lookup_elem(PROG_ARRAY_FD, &key, &id);
assert(!err);
assert(id == info.id);
sock = open_raw_sock("lo"); sock = open_raw_sock("lo");
assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd[4], assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd[4],

17
samples/bpf/test_map_in_map_user.c
View file

@ -32,6 +32,20 @@ static const char * const test_names[] = {
#define NR_TESTS (sizeof(test_names) / sizeof(*test_names)) #define NR_TESTS (sizeof(test_names) / sizeof(*test_names))
static void check_map_id(int inner_map_fd, int map_in_map_fd, uint32_t key)
{
struct bpf_map_info info = {};
uint32_t info_len = sizeof(info);
int ret, id;
ret = bpf_obj_get_info_by_fd(inner_map_fd, &info, &info_len);
assert(!ret);
ret = bpf_map_lookup_elem(map_in_map_fd, &key, &id);
assert(!ret);
assert(id == info.id);
}
static void populate_map(uint32_t port_key, int magic_result) static void populate_map(uint32_t port_key, int magic_result)
{ {
int ret; int ret;
@ -45,12 +59,15 @@ static void populate_map(uint32_t port_key, int magic_result)
ret = bpf_map_update_elem(A_OF_PORT_A, &port_key, &PORT_A, BPF_ANY); ret = bpf_map_update_elem(A_OF_PORT_A, &port_key, &PORT_A, BPF_ANY);
assert(!ret); assert(!ret);
check_map_id(PORT_A, A_OF_PORT_A, port_key);
ret = bpf_map_update_elem(H_OF_PORT_A, &port_key, &PORT_A, BPF_NOEXIST); ret = bpf_map_update_elem(H_OF_PORT_A, &port_key, &PORT_A, BPF_NOEXIST);
assert(!ret); assert(!ret);
check_map_id(PORT_A, H_OF_PORT_A, port_key);
ret = bpf_map_update_elem(H_OF_PORT_H, &port_key, &PORT_H, BPF_NOEXIST); ret = bpf_map_update_elem(H_OF_PORT_H, &port_key, &PORT_H, BPF_NOEXIST);
assert(!ret); assert(!ret);
check_map_id(PORT_H, H_OF_PORT_H, port_key);
} }
static void test_map_in_map(void) static void test_map_in_map(void)