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selftests/pidfd: expand common pidfd header

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Move more infrastructure to the pidfd header.

Link: https://lore.kernel.org/r/20250305-work-pidfs-kill_on_last_close-v3-9-c8c3d8361705@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-03-05 11:08:19 +01:00
parent 18938f7180
commit ddf5315526
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
3 changed files with 78 additions and 71 deletions
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78
tools/testing/selftests/pidfd/pidfd.h
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@ -12,6 +12,7 @@
#include <stdlib.h>
#include <string.h>
#include <syscall.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/wait.h>
@ -66,6 +67,83 @@
#define PIDFD_SELF_PROCESS PIDFD_SELF_THREAD_GROUP
#endif
#ifndef PIDFS_IOCTL_MAGIC
#define PIDFS_IOCTL_MAGIC 0xFF
#endif
#ifndef PIDFD_GET_CGROUP_NAMESPACE
#define PIDFD_GET_CGROUP_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 1)
#endif
#ifndef PIDFD_GET_IPC_NAMESPACE
#define PIDFD_GET_IPC_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 2)
#endif
#ifndef PIDFD_GET_MNT_NAMESPACE
#define PIDFD_GET_MNT_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 3)
#endif
#ifndef PIDFD_GET_NET_NAMESPACE
#define PIDFD_GET_NET_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 4)
#endif
#ifndef PIDFD_GET_PID_NAMESPACE
#define PIDFD_GET_PID_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 5)
#endif
#ifndef PIDFD_GET_PID_FOR_CHILDREN_NAMESPACE
#define PIDFD_GET_PID_FOR_CHILDREN_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 6)
#endif
#ifndef PIDFD_GET_TIME_NAMESPACE
#define PIDFD_GET_TIME_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 7)
#endif
#ifndef PIDFD_GET_TIME_FOR_CHILDREN_NAMESPACE
#define PIDFD_GET_TIME_FOR_CHILDREN_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 8)
#endif
#ifndef PIDFD_GET_USER_NAMESPACE
#define PIDFD_GET_USER_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 9)
#endif
#ifndef PIDFD_GET_UTS_NAMESPACE
#define PIDFD_GET_UTS_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 10)
#endif
#ifndef PIDFD_GET_INFO
#define PIDFD_GET_INFO _IOWR(PIDFS_IOCTL_MAGIC, 11, struct pidfd_info)
#endif
#ifndef PIDFD_INFO_PID
#define PIDFD_INFO_PID (1UL << 0) /* Always returned, even if not requested */
#endif
#ifndef PIDFD_INFO_CREDS
#define PIDFD_INFO_CREDS (1UL << 1) /* Always returned, even if not requested */
#endif
#ifndef PIDFD_INFO_CGROUPID
#define PIDFD_INFO_CGROUPID (1UL << 2) /* Always returned if available, even if not requested */
#endif
struct pidfd_info {
__u64 mask;
__u64 cgroupid;
__u32 pid;
__u32 tgid;
__u32 ppid;
__u32 ruid;
__u32 rgid;
__u32 euid;
__u32 egid;
__u32 suid;
__u32 sgid;
__u32 fsuid;
__u32 fsgid;
__u32 spare0[1];
};
/*
* The kernel reserves 300 pids via RESERVED_PIDS in kernel/pid.c
* That means, when it wraps around any pid < 300 will be skipped.

26
tools/testing/selftests/pidfd/pidfd_open_test.c
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@ -22,32 +22,6 @@
#include "pidfd.h"
#include "../kselftest.h"
#ifndef PIDFS_IOCTL_MAGIC
#define PIDFS_IOCTL_MAGIC 0xFF
#endif
#ifndef PIDFD_GET_INFO
#define PIDFD_GET_INFO _IOWR(PIDFS_IOCTL_MAGIC, 11, struct pidfd_info)
#define PIDFD_INFO_CGROUPID (1UL << 0)
struct pidfd_info {
__u64 mask;
__u64 cgroupid;
__u32 pid;
__u32 tgid;
__u32 ppid;
__u32 ruid;
__u32 rgid;
__u32 euid;
__u32 egid;
__u32 suid;
__u32 sgid;
__u32 fsuid;
__u32 fsgid;
__u32 spare0[1];
};
#endif
static int safe_int(const char *numstr, int *converted)
{
char *err = NULL;

45
tools/testing/selftests/pidfd/pidfd_setns_test.c
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@ -16,55 +16,10 @@
#include <unistd.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include "pidfd.h"
#include "../kselftest_harness.h"
#ifndef PIDFS_IOCTL_MAGIC
#define PIDFS_IOCTL_MAGIC 0xFF
#endif
#ifndef PIDFD_GET_CGROUP_NAMESPACE
#define PIDFD_GET_CGROUP_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 1)
#endif
#ifndef PIDFD_GET_IPC_NAMESPACE
#define PIDFD_GET_IPC_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 2)
#endif
#ifndef PIDFD_GET_MNT_NAMESPACE
#define PIDFD_GET_MNT_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 3)
#endif
#ifndef PIDFD_GET_NET_NAMESPACE
#define PIDFD_GET_NET_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 4)
#endif
#ifndef PIDFD_GET_PID_NAMESPACE
#define PIDFD_GET_PID_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 5)
#endif
#ifndef PIDFD_GET_PID_FOR_CHILDREN_NAMESPACE
#define PIDFD_GET_PID_FOR_CHILDREN_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 6)
#endif
#ifndef PIDFD_GET_TIME_NAMESPACE
#define PIDFD_GET_TIME_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 7)
#endif
#ifndef PIDFD_GET_TIME_FOR_CHILDREN_NAMESPACE
#define PIDFD_GET_TIME_FOR_CHILDREN_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 8)
#endif
#ifndef PIDFD_GET_USER_NAMESPACE
#define PIDFD_GET_USER_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 9)
#endif
#ifndef PIDFD_GET_UTS_NAMESPACE
#define PIDFD_GET_UTS_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 10)
#endif
enum {
PIDFD_NS_USER,
PIDFD_NS_MNT,