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selftest: af_unix: Silence -Wflex-array-member-not-at-end warning for scm_inq.c.

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scm_inq.c has no problem in functionality, but when compiled with
-Wflex-array-member-not-at-end, it shows this warning:

scm_inq.c:15:24: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
   15 |         struct cmsghdr cmsghdr;
      |                        ^~~~~~~

Let's silence it.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250811215432.3379570-3-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kuniyuki Iwashima 2025-08-11 21:53:05 +00:00 committed by Jakub Kicinski
parent b1987f1e05
commit 942224e6ba
1 changed files with 12 additions and 14 deletions
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26
tools/testing/selftests/net/af_unix/scm_inq.c
View File

@ -11,11 +11,6 @@
#define NR_CHUNKS 100
#define MSG_LEN 256
struct scm_inq {
struct cmsghdr cmsghdr;
int inq;
};
FIXTURE(scm_inq)
{
int fd[2];
@ -70,35 +65,38 @@ static void send_chunks(struct __test_metadata *_metadata,
static void recv_chunks(struct __test_metadata *_metadata,
FIXTURE_DATA(scm_inq) *self)
{
char cmsg_buf[CMSG_SPACE(sizeof(int))];
struct msghdr msg = {};
struct iovec iov = {};
struct scm_inq cmsg;
struct cmsghdr *cmsg;
char buf[MSG_LEN];
int i, ret;
int inq;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = &cmsg;
msg.msg_controllen = CMSG_SPACE(sizeof(cmsg.inq));
msg.msg_control = cmsg_buf;
msg.msg_controllen = sizeof(cmsg_buf);
iov.iov_base = buf;
iov.iov_len = sizeof(buf);
for (i = 0; i < NR_CHUNKS; i++) {
memset(buf, 0, sizeof(buf));
memset(&cmsg, 0, sizeof(cmsg));
memset(cmsg_buf, 0, sizeof(cmsg_buf));
ret = recvmsg(self->fd[1], &msg, 0);
ASSERT_EQ(MSG_LEN, ret);
ASSERT_NE(NULL, CMSG_FIRSTHDR(&msg));
ASSERT_EQ(CMSG_LEN(sizeof(cmsg.inq)), cmsg.cmsghdr.cmsg_len);
ASSERT_EQ(SOL_SOCKET, cmsg.cmsghdr.cmsg_level);
ASSERT_EQ(SCM_INQ, cmsg.cmsghdr.cmsg_type);
cmsg = CMSG_FIRSTHDR(&msg);
ASSERT_NE(NULL, cmsg);
ASSERT_EQ(CMSG_LEN(sizeof(int)), cmsg->cmsg_len);
ASSERT_EQ(SOL_SOCKET, cmsg->cmsg_level);
ASSERT_EQ(SCM_INQ, cmsg->cmsg_type);
ret = ioctl(self->fd[1], SIOCINQ, &inq);
ASSERT_EQ(0, ret);
ASSERT_EQ(cmsg.inq, inq);
ASSERT_EQ(*(int *)CMSG_DATA(cmsg), inq);
}
}