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selftests: add selftest for UDP SO_PEEK_OFF support

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Add the SO_PEEK_OFF selftest for UDP. In this patch, I mainly do
three things:
1. rename tcp_so_peek_off.c
2. adjust for UDP protocol
3. add selftests into it

Suggested-by: Jon Maloy <jmaloy@redhat.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason Xing 2024-09-03 00:06:10 +08:00 committed by David S. Miller
parent ff09bc366f
commit 5c26516f09
3 changed files with 57 additions and 37 deletions
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1
tools/testing/selftests/net/.gitignore vendored
View File

@ -34,6 +34,7 @@ scm_pidfd
scm_rights
sk_bind_sendto_listen
sk_connect_zero_addr
sk_so_peek_off
socket
so_incoming_cpu
so_netns_cookie

2
tools/testing/selftests/net/Makefile
View File

@ -80,7 +80,7 @@ TEST_PROGS += io_uring_zerocopy_tx.sh
TEST_GEN_FILES += bind_bhash
TEST_GEN_PROGS += sk_bind_sendto_listen
TEST_GEN_PROGS += sk_connect_zero_addr
TEST_GEN_PROGS += tcp_so_peek_off
TEST_GEN_PROGS += sk_so_peek_off
TEST_PROGS += test_ingress_egress_chaining.sh
TEST_GEN_PROGS += so_incoming_cpu
TEST_PROGS += sctp_vrf.sh

91
tools/testing/selftests/net/tcp_so_peek_off.c → tools/testing/selftests/net/sk_so_peek_off.c
View File

@ -10,37 +10,41 @@
#include <arpa/inet.h>
#include "../kselftest.h"
static char *afstr(int af)
static char *afstr(int af, int proto)
{
return af == AF_INET ? "TCP/IPv4" : "TCP/IPv6";
if (proto == IPPROTO_TCP)
return af == AF_INET ? "TCP/IPv4" : "TCP/IPv6";
else
return af == AF_INET ? "UDP/IPv4" : "UDP/IPv6";
}
int tcp_peek_offset_probe(sa_family_t af)
int sk_peek_offset_probe(sa_family_t af, int proto)
{
int type = (proto == IPPROTO_TCP ? SOCK_STREAM : SOCK_DGRAM);
int optv = 0;
int ret = 0;
int s;
s = socket(af, SOCK_STREAM | SOCK_CLOEXEC, IPPROTO_TCP);
s = socket(af, type, proto);
if (s < 0) {
ksft_perror("Temporary TCP socket creation failed");
} else {
if (!setsockopt(s, SOL_SOCKET, SO_PEEK_OFF, &optv, sizeof(int)))
ret = 1;
else
printf("%s does not support SO_PEEK_OFF\n", afstr(af));
printf("%s does not support SO_PEEK_OFF\n", afstr(af, proto));
close(s);
}
return ret;
}
static void tcp_peek_offset_set(int s, int offset)
static void sk_peek_offset_set(int s, int offset)
{
if (setsockopt(s, SOL_SOCKET, SO_PEEK_OFF, &offset, sizeof(offset)))
ksft_perror("Failed to set SO_PEEK_OFF value\n");
}
static int tcp_peek_offset_get(int s)
static int sk_peek_offset_get(int s)
{
int offset;
socklen_t len = sizeof(offset);
@ -50,8 +54,9 @@ static int tcp_peek_offset_get(int s)
return offset;
}
static int tcp_peek_offset_test(sa_family_t af)
static int sk_peek_offset_test(sa_family_t af, int proto)
{
int type = (proto == IPPROTO_TCP ? SOCK_STREAM : SOCK_DGRAM);
union {
struct sockaddr sa;
struct sockaddr_in a4;
@ -62,13 +67,13 @@ static int tcp_peek_offset_test(sa_family_t af)
int recv_sock = 0;
int offset = 0;
ssize_t len;
char buf;
char buf[2];
memset(&a, 0, sizeof(a));
a.sa.sa_family = af;
s[0] = socket(af, SOCK_STREAM, IPPROTO_TCP);
s[1] = socket(af, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
s[0] = recv_sock = socket(af, type, proto);
s[1] = socket(af, type, proto);
if (s[0] < 0 || s[1] < 0) {
ksft_perror("Temporary socket creation failed\n");
@ -82,76 +87,78 @@ static int tcp_peek_offset_test(sa_family_t af)
ksft_perror("Temporary socket getsockname() failed\n");
goto out;
}
if (listen(s[0], 0) < 0) {
if (proto == IPPROTO_TCP && listen(s[0], 0) < 0) {
ksft_perror("Temporary socket listen() failed\n");
goto out;
}
if (connect(s[1], &a.sa, sizeof(a)) >= 0 || errno != EINPROGRESS) {
if (connect(s[1], &a.sa, sizeof(a)) < 0) {
ksft_perror("Temporary socket connect() failed\n");
goto out;
}
recv_sock = accept(s[0], NULL, NULL);
if (recv_sock <= 0) {
ksft_perror("Temporary socket accept() failed\n");
goto out;
if (proto == IPPROTO_TCP) {
recv_sock = accept(s[0], NULL, NULL);
if (recv_sock <= 0) {
ksft_perror("Temporary socket accept() failed\n");
goto out;
}
}
/* Some basic tests of getting/setting offset */
offset = tcp_peek_offset_get(recv_sock);
offset = sk_peek_offset_get(recv_sock);
if (offset != -1) {
ksft_perror("Initial value of socket offset not -1\n");
goto out;
}
tcp_peek_offset_set(recv_sock, 0);
offset = tcp_peek_offset_get(recv_sock);
sk_peek_offset_set(recv_sock, 0);
offset = sk_peek_offset_get(recv_sock);
if (offset != 0) {
ksft_perror("Failed to set socket offset to 0\n");
goto out;
}
/* Transfer a message */
if (send(s[1], (char *)("ab"), 2, 0) <= 0 || errno != EINPROGRESS) {
if (send(s[1], (char *)("ab"), 2, 0) != 2) {
ksft_perror("Temporary probe socket send() failed\n");
goto out;
}
/* Read first byte */
len = recv(recv_sock, &buf, 1, MSG_PEEK);
if (len != 1 || buf != 'a') {
len = recv(recv_sock, buf, 1, MSG_PEEK);
if (len != 1 || buf[0] != 'a') {
ksft_perror("Failed to read first byte of message\n");
goto out;
}
offset = tcp_peek_offset_get(recv_sock);
offset = sk_peek_offset_get(recv_sock);
if (offset != 1) {
ksft_perror("Offset not forwarded correctly at first byte\n");
goto out;
}
/* Try to read beyond last byte */
len = recv(recv_sock, &buf, 2, MSG_PEEK);
if (len != 1 || buf != 'b') {
len = recv(recv_sock, buf, 2, MSG_PEEK);
if (len != 1 || buf[0] != 'b') {
ksft_perror("Failed to read last byte of message\n");
goto out;
}
offset = tcp_peek_offset_get(recv_sock);
offset = sk_peek_offset_get(recv_sock);
if (offset != 2) {
ksft_perror("Offset not forwarded correctly at last byte\n");
goto out;
}
/* Flush message */
len = recv(recv_sock, NULL, 2, MSG_TRUNC);
len = recv(recv_sock, buf, 2, MSG_TRUNC);
if (len != 2) {
ksft_perror("Failed to flush message\n");
goto out;
}
offset = tcp_peek_offset_get(recv_sock);
offset = sk_peek_offset_get(recv_sock);
if (offset != 0) {
ksft_perror("Offset not reverted correctly after flush\n");
goto out;
}
printf("%s with MSG_PEEK_OFF works correctly\n", afstr(af));
printf("%s with MSG_PEEK_OFF works correctly\n", afstr(af, proto));
res = 1;
out:
if (recv_sock >= 0)
if (proto == IPPROTO_TCP && recv_sock >= 0)
close(recv_sock);
if (s[1] >= 0)
close(s[1]);
@ -160,24 +167,36 @@ out:
return res;
}
int main(void)
static int do_test(int proto)
{
int res4, res6;
res4 = tcp_peek_offset_probe(AF_INET);
res6 = tcp_peek_offset_probe(AF_INET6);
res4 = sk_peek_offset_probe(AF_INET, proto);
res6 = sk_peek_offset_probe(AF_INET6, proto);
if (!res4 && !res6)
return KSFT_SKIP;
if (res4)
res4 = tcp_peek_offset_test(AF_INET);
res4 = sk_peek_offset_test(AF_INET, proto);
if (res6)
res6 = tcp_peek_offset_test(AF_INET6);
res6 = sk_peek_offset_test(AF_INET6, proto);
if (!res4 || !res6)
return KSFT_FAIL;
return KSFT_PASS;
}
int main(void)
{
int restcp, resudp;
restcp = do_test(IPPROTO_TCP);
resudp = do_test(IPPROTO_UDP);
if (restcp == KSFT_FAIL || resudp == KSFT_FAIL)
return KSFT_FAIL;
return KSFT_PASS;
}