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111 lines
2.1 KiB
111 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __PIDFD_H |
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#define __PIDFD_H |
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#define _GNU_SOURCE |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <sched.h> |
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#include <signal.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <syscall.h> |
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#include <sys/mount.h> |
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#include <sys/types.h> |
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#include <sys/wait.h> |
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#include "../kselftest.h" |
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#ifndef P_PIDFD |
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#define P_PIDFD 3 |
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#endif |
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#ifndef CLONE_NEWTIME |
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#define CLONE_NEWTIME 0x00000080 |
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#endif |
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#ifndef CLONE_PIDFD |
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#define CLONE_PIDFD 0x00001000 |
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#endif |
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#ifndef __NR_pidfd_open |
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#define __NR_pidfd_open -1 |
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#endif |
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#ifndef __NR_pidfd_send_signal |
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#define __NR_pidfd_send_signal -1 |
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#endif |
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#ifndef __NR_clone3 |
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#define __NR_clone3 -1 |
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#endif |
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#ifndef __NR_pidfd_getfd |
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#define __NR_pidfd_getfd -1 |
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#endif |
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#ifndef PIDFD_NONBLOCK |
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#define PIDFD_NONBLOCK O_NONBLOCK |
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#endif |
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/* |
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* The kernel reserves 300 pids via RESERVED_PIDS in kernel/pid.c |
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* That means, when it wraps around any pid < 300 will be skipped. |
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* So we need to use a pid > 300 in order to test recycling. |
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*/ |
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#define PID_RECYCLE 1000 |
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/* |
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* Define a few custom error codes for the child process to clearly indicate |
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* what is happening. This way we can tell the difference between a system |
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* error, a test error, etc. |
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*/ |
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#define PIDFD_PASS 0 |
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#define PIDFD_FAIL 1 |
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#define PIDFD_ERROR 2 |
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#define PIDFD_SKIP 3 |
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#define PIDFD_XFAIL 4 |
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int wait_for_pid(pid_t pid) |
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{ |
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int status, ret; |
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again: |
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ret = waitpid(pid, &status, 0); |
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if (ret == -1) { |
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if (errno == EINTR) |
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goto again; |
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return -1; |
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} |
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if (!WIFEXITED(status)) |
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return -1; |
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return WEXITSTATUS(status); |
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} |
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static inline int sys_pidfd_open(pid_t pid, unsigned int flags) |
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{ |
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return syscall(__NR_pidfd_open, pid, flags); |
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} |
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static inline int sys_pidfd_send_signal(int pidfd, int sig, siginfo_t *info, |
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unsigned int flags) |
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{ |
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return syscall(__NR_pidfd_send_signal, pidfd, sig, info, flags); |
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} |
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static inline int sys_pidfd_getfd(int pidfd, int fd, int flags) |
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{ |
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return syscall(__NR_pidfd_getfd, pidfd, fd, flags); |
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} |
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static inline int sys_memfd_create(const char *name, unsigned int flags) |
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{ |
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return syscall(__NR_memfd_create, name, flags); |
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} |
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#endif /* __PIDFD_H */
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