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selftests/net: add tests for PACKET_FANOUT_FLAG_UNIQUEID

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Create two groups with PACKET_FANOUT_FLAG_UNIQUEID, add a socket to one.
Ensure that the groups can only be joined if all options are consistent
with the original except for this flag.

Signed-off-by: Mike Maloney <maloney@google.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mike Maloney 2017-04-21 10:56:12 -04:00 committed by David S. Miller
parent 4a69a86420
commit 28be04f5c1
1 changed files with 84 additions and 11 deletions
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95
tools/testing/selftests/net/psock_fanout.c
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@ -71,7 +71,7 @@
/* Open a socket in a given fanout mode.
* @return -1 if mode is bad, a valid socket otherwise */
static int sock_fanout_open(uint16_t typeflags)
static int sock_fanout_open(uint16_t typeflags, uint16_t group_id)
{
int fd, val;
@ -81,8 +81,7 @@ static int sock_fanout_open(uint16_t typeflags)
exit(1);
}
/* fanout group ID is always 0: tests whether old groups are deleted */
val = ((int) typeflags) << 16;
val = (((int) typeflags) << 16) | group_id;
if (setsockopt(fd, SOL_PACKET, PACKET_FANOUT, &val, sizeof(val))) {
if (close(fd)) {
perror("close packet");
@ -113,6 +112,20 @@ static void sock_fanout_set_cbpf(int fd)
}
}
static void sock_fanout_getopts(int fd, uint16_t *typeflags, uint16_t *group_id)
{
int sockopt;
socklen_t sockopt_len = sizeof(sockopt);
if (getsockopt(fd, SOL_PACKET, PACKET_FANOUT,
&sockopt, &sockopt_len)) {
perror("failed to getsockopt");
exit(1);
}
*typeflags = sockopt >> 16;
*group_id = sockopt & 0xfffff;
}
static void sock_fanout_set_ebpf(int fd)
{
const int len_off = __builtin_offsetof(struct __sk_buff, len);
@ -228,7 +241,7 @@ static void test_control_single(void)
fprintf(stderr, "test: control single socket\n");
if (sock_fanout_open(PACKET_FANOUT_ROLLOVER |
PACKET_FANOUT_FLAG_ROLLOVER) != -1) {
PACKET_FANOUT_FLAG_ROLLOVER, 0) != -1) {
fprintf(stderr, "ERROR: opened socket with dual rollover\n");
exit(1);
}
@ -241,26 +254,26 @@ static void test_control_group(void)
fprintf(stderr, "test: control multiple sockets\n");
fds[0] = sock_fanout_open(PACKET_FANOUT_HASH);
fds[0] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[0] == -1) {
fprintf(stderr, "ERROR: failed to open HASH socket\n");
exit(1);
}
if (sock_fanout_open(PACKET_FANOUT_HASH |
PACKET_FANOUT_FLAG_DEFRAG) != -1) {
PACKET_FANOUT_FLAG_DEFRAG, 0) != -1) {
fprintf(stderr, "ERROR: joined group with wrong flag defrag\n");
exit(1);
}
if (sock_fanout_open(PACKET_FANOUT_HASH |
PACKET_FANOUT_FLAG_ROLLOVER) != -1) {
PACKET_FANOUT_FLAG_ROLLOVER, 0) != -1) {
fprintf(stderr, "ERROR: joined group with wrong flag ro\n");
exit(1);
}
if (sock_fanout_open(PACKET_FANOUT_CPU) != -1) {
if (sock_fanout_open(PACKET_FANOUT_CPU, 0) != -1) {
fprintf(stderr, "ERROR: joined group with wrong mode\n");
exit(1);
}
fds[1] = sock_fanout_open(PACKET_FANOUT_HASH);
fds[1] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[1] == -1) {
fprintf(stderr, "ERROR: failed to join group\n");
exit(1);
@ -271,6 +284,61 @@ static void test_control_group(void)
}
}
/* Test creating a unique fanout group ids */
static void test_unique_fanout_group_ids(void)
{
int fds[3];
uint16_t typeflags, first_group_id, second_group_id;
fprintf(stderr, "test: unique ids\n");
fds[0] = sock_fanout_open(PACKET_FANOUT_HASH |
PACKET_FANOUT_FLAG_UNIQUEID, 0);
if (fds[0] == -1) {
fprintf(stderr, "ERROR: failed to create a unique id group.\n");
exit(1);
}
sock_fanout_getopts(fds[0], &typeflags, &first_group_id);
if (typeflags != PACKET_FANOUT_HASH) {
fprintf(stderr, "ERROR: unexpected typeflags %x\n", typeflags);
exit(1);
}
if (sock_fanout_open(PACKET_FANOUT_CPU, first_group_id)) {
fprintf(stderr, "ERROR: joined group with wrong type.\n");
exit(1);
}
fds[1] = sock_fanout_open(PACKET_FANOUT_HASH, first_group_id);
if (fds[1] == -1) {
fprintf(stderr,
"ERROR: failed to join previously created group.\n");
exit(1);
}
fds[2] = sock_fanout_open(PACKET_FANOUT_HASH |
PACKET_FANOUT_FLAG_UNIQUEID, 0);
if (fds[2] == -1) {
fprintf(stderr,
"ERROR: failed to create a second unique id group.\n");
exit(1);
}
sock_fanout_getopts(fds[2], &typeflags, &second_group_id);
if (sock_fanout_open(PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_UNIQUEID,
second_group_id) != -1) {
fprintf(stderr,
"ERROR: specified a group id when requesting unique id\n");
exit(1);
}
if (close(fds[0]) || close(fds[1]) || close(fds[2])) {
fprintf(stderr, "ERROR: closing sockets\n");
exit(1);
}
}
static int test_datapath(uint16_t typeflags, int port_off,
const int expect1[], const int expect2[])
{
@ -281,8 +349,8 @@ static int test_datapath(uint16_t typeflags, int port_off,
fprintf(stderr, "test: datapath 0x%hx\n", typeflags);
fds[0] = sock_fanout_open(typeflags);
fds[1] = sock_fanout_open(typeflags);
fds[0] = sock_fanout_open(typeflags, 0);
fds[1] = sock_fanout_open(typeflags, 0);
if (fds[0] == -1 || fds[1] == -1) {
fprintf(stderr, "ERROR: failed open\n");
exit(1);
@ -349,10 +417,12 @@ int main(int argc, char **argv)
const int expect_cpu0[2][2] = { { 20, 0 }, { 20, 0 } };
const int expect_cpu1[2][2] = { { 0, 20 }, { 0, 20 } };
const int expect_bpf[2][2] = { { 15, 5 }, { 15, 20 } };
const int expect_uniqueid[2][2] = { { 20, 20}, { 20, 20 } };
int port_off = 2, tries = 5, ret;
test_control_single();
test_control_group();
test_unique_fanout_group_ids();
/* find a set of ports that do not collide onto the same socket */
ret = test_datapath(PACKET_FANOUT_HASH, port_off,
@ -383,6 +453,9 @@ int main(int argc, char **argv)
ret |= test_datapath(PACKET_FANOUT_CPU, port_off,
expect_cpu1[0], expect_cpu1[1]);
ret |= test_datapath(PACKET_FANOUT_FLAG_UNIQUEID, port_off,
expect_uniqueid[0], expect_uniqueid[1]);
if (ret)
return 1;