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selftests/bpf: Support af_unix SOCK_DGRAM socket pair creation

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Handle af_unix in init_addr_loopback(). For pair creation, bind() the peer
socket to make SOCK_DGRAM connect() happy.

Signed-off-by: Michal Luczaj <mhal@rbox.co>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/r/20250515-selftests-sockmap-redir-v3-1-a1ea723f7e7e@rbox.co
This commit is contained in:
Michal Luczaj
2025-05-15 00:15:24 +02:00
committed by Martin KaFai Lau
parent 5ead949920
commit fb1131d5e1
1 changed files with 24 additions and 5 deletions
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29
tools/testing/selftests/bpf/prog_tests/socket_helpers.h
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@@ -3,6 +3,7 @@
#ifndef __SOCKET_HELPERS__
#define __SOCKET_HELPERS__
#include <sys/un.h>
#include <linux/vm_sockets.h>
/* include/linux/net.h */
@@ -169,6 +170,15 @@ static inline void init_addr_loopback6(struct sockaddr_storage *ss,
*len = sizeof(*addr6);
}
static inline void init_addr_loopback_unix(struct sockaddr_storage *ss,
socklen_t *len)
{
struct sockaddr_un *addr = memset(ss, 0, sizeof(*ss));
addr->sun_family = AF_UNIX;
*len = sizeof(sa_family_t);
}
static inline void init_addr_loopback_vsock(struct sockaddr_storage *ss,
socklen_t *len)
{
@@ -190,6 +200,9 @@ static inline void init_addr_loopback(int family, struct sockaddr_storage *ss,
case AF_INET6:
init_addr_loopback6(ss, len);
return;
case AF_UNIX:
init_addr_loopback_unix(ss, len);
return;
case AF_VSOCK:
init_addr_loopback_vsock(ss, len);
return;
@@ -315,21 +328,27 @@ static inline int create_pair(int family, int sotype, int *p0, int *p1)
{
__close_fd int s, c = -1, p = -1;
struct sockaddr_storage addr;
socklen_t len = sizeof(addr);
socklen_t len;
int err;
s = socket_loopback(family, sotype);
if (s < 0)
return s;
err = xgetsockname(s, sockaddr(&addr), &len);
if (err)
return err;
c = xsocket(family, sotype, 0);
if (c < 0)
return c;
init_addr_loopback(family, &addr, &len);
err = xbind(c, sockaddr(&addr), len);
if (err)
return err;
len = sizeof(addr);
err = xgetsockname(s, sockaddr(&addr), &len);
if (err)
return err;
err = connect(c, sockaddr(&addr), len);
if (err) {
if (errno != EINPROGRESS) {