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selftests/net: test max_num_members, fanout_args in psock_fanout

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Add an additional control test that verifies:
-specifying two different max_num_members values fails
-specifying max_num_members > PACKET_FANOUT_MAX fails

In datapath tests, set max_num_members to PACKET_FANOUT_MAX.

Signed-off-by: Tanner Love <tannerlove@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Tanner Love 2020-11-06 13:07:41 -05:00 committed by Jakub Kicinski
parent 9c661b0b85
commit 1db32acfde
1 changed files with 69 additions and 3 deletions
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72
tools/testing/selftests/net/psock_fanout.c
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@ -56,12 +56,15 @@
#define RING_NUM_FRAMES 20
static uint32_t cfg_max_num_members;
/* 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, uint16_t group_id)
{
struct sockaddr_ll addr = {0};
int fd, val;
struct fanout_args args;
int fd, val, err;
fd = socket(PF_PACKET, SOCK_RAW, 0);
if (fd < 0) {
@ -83,8 +86,18 @@ static int sock_fanout_open(uint16_t typeflags, uint16_t group_id)
exit(1);
}
val = (((int) typeflags) << 16) | group_id;
if (setsockopt(fd, SOL_PACKET, PACKET_FANOUT, &val, sizeof(val))) {
if (cfg_max_num_members) {
args.id = group_id;
args.type_flags = typeflags;
args.max_num_members = cfg_max_num_members;
err = setsockopt(fd, SOL_PACKET, PACKET_FANOUT, &args,
sizeof(args));
} else {
val = (((int) typeflags) << 16) | group_id;
err = setsockopt(fd, SOL_PACKET, PACKET_FANOUT, &val,
sizeof(val));
}
if (err) {
if (close(fd)) {
perror("close packet");
exit(1);
@ -286,6 +299,56 @@ static void test_control_group(void)
}
}
/* Test illegal max_num_members values */
static void test_control_group_max_num_members(void)
{
int fds[3];
fprintf(stderr, "test: control multiple sockets, max_num_members\n");
/* expected failure on greater than PACKET_FANOUT_MAX */
cfg_max_num_members = (1 << 16) + 1;
if (sock_fanout_open(PACKET_FANOUT_HASH, 0) != -1) {
fprintf(stderr, "ERROR: max_num_members > PACKET_FANOUT_MAX\n");
exit(1);
}
cfg_max_num_members = 256;
fds[0] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[0] == -1) {
fprintf(stderr, "ERROR: failed open\n");
exit(1);
}
/* expected failure on joining group with different max_num_members */
cfg_max_num_members = 257;
if (sock_fanout_open(PACKET_FANOUT_HASH, 0) != -1) {
fprintf(stderr, "ERROR: set different max_num_members\n");
exit(1);
}
/* success on joining group with same max_num_members */
cfg_max_num_members = 256;
fds[1] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[1] == -1) {
fprintf(stderr, "ERROR: failed to join group\n");
exit(1);
}
/* success on joining group with max_num_members unspecified */
cfg_max_num_members = 0;
fds[2] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[2] == -1) {
fprintf(stderr, "ERROR: failed to join group\n");
exit(1);
}
if (close(fds[2]) || close(fds[1]) || close(fds[0])) {
fprintf(stderr, "ERROR: closing sockets\n");
exit(1);
}
}
/* Test creating a unique fanout group ids */
static void test_unique_fanout_group_ids(void)
{
@ -426,8 +489,11 @@ int main(int argc, char **argv)
test_control_single();
test_control_group();
test_control_group_max_num_members();
test_unique_fanout_group_ids();
/* PACKET_FANOUT_MAX */
cfg_max_num_members = 1 << 16;
/* find a set of ports that do not collide onto the same socket */
ret = test_datapath(PACKET_FANOUT_HASH, port_off,
expect_hash[0], expect_hash[1]);