Re: [LTP] [PATCH v2] rpc: create valid fd to pass libtirpc validation

Petr Vorel
2026-01-13T12:26:21Z

Hi all,

[ Cc Steve and linux-nfs ]

> The testcase(rpc_svc_destroy, rpc_svcfd_create, rpc_xprt_register,
> rpc_xprt_unregister) was failing due to an invalid fd, which
> caused libtirpc's internal validation to reject the operation.
> This change ensures a valid socket fd is created and can pass the
> validation checks in libtirpc.

+ I would also like to know more details about the failure (libtirpc version, or
do you still use Sun RPC from old glibc, distro, arch, ...).

Because while we have some problems with some of these tests, I'm not sure if
connecting to 127.0.0.1 is a valid approach. And if it is, should it be used in
more tests? Also rpc_svc_destroy_stress.c and rpc_svcfd_create_limits.c use
svcfd_create().

Below are few minor implementation details. First, maybe add a common header,
with code in the function which would be used? But it can be done later (RPC
test code is really awful, more duplicity will not make it worse).

> Signed-off-by: Liu Jian <liujian56@huawei.com>
> ---
> v2: Fix a compilation error on Alpine.
> .../rpc_svc_destroy.c | 27 +++++++++++++++++++
> .../rpc_svcfd_create.c | 26 ++++++++++++++++++
> .../rpc_xprt_register.c | 25 +++++++++++++++++
> .../rpc_xprt_unregister.c | 25 +++++++++++++++++
> 4 files changed, 103 insertions(+)

> diff --git a/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_createdestroy_svc_destroy/rpc_svc_destroy.c b/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_createdestroy_svc_destroy/rpc_svc_destroy.c
> index 22e560843..b9240ccba 100644
> --- a/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_createdestroy_svc_destroy/rpc_svc_destroy.c
> +++ b/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_createdestroy_svc_destroy/rpc_svc_destroy.c
> @@ -30,6 +30,12 @@
> #include <time.h>
> #include <rpc/rpc.h>

> +#include <unistd.h>
> +#include <sys/socket.h>
> +#include <netinet/in.h>
> +#include <arpa/inet.h>
> +#include <string.h>
> +
> //Standard define
> #define PROCNUM 1
> #define VERSNUM 1
> @@ -43,6 +49,27 @@ int main(void)
> int test_status = 1; //Default test result set to FAILED
> int fd = 0;
> SVCXPRT *svcr = NULL;
> + struct sockaddr_in server_addr;
> +
> + fd = socket(AF_INET, SOCK_DGRAM, 0);
> + if (fd < 0) {
> + printf("socket creation failed");
Maybe fprintf(stderr, ...) or perror()?

> + return test_status;
> + }
> +
> + memset(&server_addr, 0, sizeof(server_addr));

Maybe just:
struct sockaddr_in server_addr = {0};
instead of memset() ?

> + server_addr.sin_family = AF_INET;
> + server_addr.sin_port = htons(9001);
> + if (inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) <= 0) {
> + printf("inet_pton failed");
> + close(fd);
> + return test_status;
> + }
> + if (connect(fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
> + printf("connect failed");
> + close(fd);
Funny that all testsuites don't close fd, but not closing single fd is not that
problematic.

Kind regards,
Petr

> + return test_status;
> + }

> //First of all, create a server
> svcr = svcfd_create(fd, 0, 0);
> diff --git a/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_createdestroy_svcfd_create/rpc_svcfd_create.c b/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_createdestroy_svcfd_create/rpc_svcfd_create.c
> index f0d89ba48..ea4418961 100644
> --- a/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_createdestroy_svcfd_create/rpc_svcfd_create.c
> +++ b/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_createdestroy_svcfd_create/rpc_svcfd_create.c
> @@ -29,6 +29,11 @@
> #include <stdlib.h>
> #include <time.h>
> #include <rpc/rpc.h>
> +#include <unistd.h>
> +#include <sys/socket.h>
> +#include <netinet/in.h>
> +#include <arpa/inet.h>
> +#include <string.h>

> //Standard define
> #define PROCNUM 1
> @@ -43,6 +48,27 @@ int main(void)
> int test_status = 1; //Default test result set to FAILED
> int fd = 0;
> SVCXPRT *svcr = NULL;
> + struct sockaddr_in server_addr;
> +
> + fd = socket(AF_INET, SOCK_DGRAM, 0);
> + if (fd < 0) {
> + printf("socket creation failed");
> + return test_status;
> + }
> +
> + memset(&server_addr, 0, sizeof(server_addr));
> + server_addr.sin_family = AF_INET;
> + server_addr.sin_port = htons(9001);
> + if (inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) <= 0) {
> + printf("inet_pton failed");
> + close(fd);
> + return test_status;
> + }
> + if (connect(fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
> + printf("connect failed");
> + close(fd);
> + return test_status;
> + }

> //create a server
> svcr = svcfd_create(fd, 0, 0);
> diff --git a/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_regunreg_xprt_register/rpc_xprt_register.c b/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_regunreg_xprt_register/rpc_xprt_register.c
> index b10a1ce5e..a40dad7fe 100644
> --- a/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_regunreg_xprt_register/rpc_xprt_register.c
> +++ b/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_regunreg_xprt_register/rpc_xprt_register.c
> @@ -31,6 +31,10 @@
> #include <rpc/rpc.h>
> #include <sys/types.h>
> #include <sys/socket.h>
> +#include <unistd.h>
> +#include <netinet/in.h>
> +#include <arpa/inet.h>
> +#include <string.h>

> //Standard define
> #define PROCNUM 1
> @@ -45,6 +49,27 @@ int main(void)
> int test_status = 1; //Default test result set to FAILED
> SVCXPRT *svcr = NULL;
> int fd = 0;
> + struct sockaddr_in server_addr;
> +
> + fd = socket(AF_INET, SOCK_DGRAM, 0);
> + if (fd < 0) {
> + printf("socket creation failed");
> + return test_status;
> + }
> +
> + memset(&server_addr, 0, sizeof(server_addr));
> + server_addr.sin_family = AF_INET;
> + server_addr.sin_port = htons(9001);
> + if (inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) <= 0) {
> + printf("inet_pton failed");
> + close(fd);
> + return test_status;
> + }
> + if (connect(fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
> + printf("connect failed");
> + close(fd);
> + return test_status;
> + }

> //create a server
> svcr = svcfd_create(fd, 1024, 1024);
> diff --git a/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_regunreg_xprt_unregister/rpc_xprt_unregister.c b/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_regunreg_xprt_unregister/rpc_xprt_unregister.c
> index 3b6130eaa..5ac51de41 100644
> --- a/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_regunreg_xprt_unregister/rpc_xprt_unregister.c
> +++ b/testcases/network/rpc/rpc-tirpc/tests_pack/rpc_suite/rpc/rpc_regunreg_xprt_unregister/rpc_xprt_unregister.c
> @@ -31,6 +31,10 @@
> #include <rpc/rpc.h>
> #include <sys/types.h>
> #include <sys/socket.h>
> +#include <unistd.h>
> +#include <netinet/in.h>
> +#include <arpa/inet.h>
> +#include <string.h>

> //Standard define
> #define PROCNUM 1
> @@ -49,6 +53,27 @@ int main(int argn, char *argc[])
> int test_status = 1; //Default test result set to FAILED
> SVCXPRT *svcr = NULL;
> int fd = 0;
> + struct sockaddr_in server_addr;
> +
> + fd = socket(AF_INET, SOCK_DGRAM, 0);
> + if (fd < 0) {
> + printf("socket creation failed");
> + return test_status;
> + }
> +
> + memset(&server_addr, 0, sizeof(server_addr));
> + server_addr.sin_family = AF_INET;
> + server_addr.sin_port = htons(9001);
> + if (inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) <= 0) {
> + printf("inet_pton failed");
> + close(fd);
> + return test_status;
> + }
> + if (connect(fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
> + printf("connect failed");
> + close(fd);
> + return test_status;
> + }

> //create a server
> svcr = svcfd_create(fd, 1024, 1024);