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exit: add internal include file with helpers

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Move struct wait_opts and waitid_info into kernel/exit.h, and include
function declarations for the recently added helpers. Make them
non-static as well.

This is in preparation for adding a waitid operation through io_uring.
With the abtracted helpers, this is now possible.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-07-11 10:40:31 -06:00
parent eda7e9d409
commit 2e521a2064
2 changed files with 37 additions and 25 deletions
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32
kernel/exit.c
View File

@ -74,6 +74,8 @@
#include <asm/unistd.h> #include <asm/unistd.h>
#include <asm/mmu_context.h> #include <asm/mmu_context.h>
#include "exit.h"
/* /*
* The default value should be high enough to not crash a system that randomly * The default value should be high enough to not crash a system that randomly
* crashes its kernel from time to time, but low enough to at least not permit * crashes its kernel from time to time, but low enough to at least not permit
@ -1037,26 +1039,6 @@ SYSCALL_DEFINE1(exit_group, int, error_code)
return 0; return 0;
} }
struct waitid_info {
pid_t pid;
uid_t uid;
int status;
int cause;
};
struct wait_opts {
enum pid_type wo_type;
int wo_flags;
struct pid *wo_pid;
struct waitid_info *wo_info;
int wo_stat;
struct rusage *wo_rusage;
wait_queue_entry_t child_wait;
int notask_error;
};
static int eligible_pid(struct wait_opts *wo, struct task_struct *p) static int eligible_pid(struct wait_opts *wo, struct task_struct *p)
{ {
return wo->wo_type == PIDTYPE_MAX || return wo->wo_type == PIDTYPE_MAX ||
@ -1520,7 +1502,7 @@ static int ptrace_do_wait(struct wait_opts *wo, struct task_struct *tsk)
return 0; return 0;
} }
static bool pid_child_should_wake(struct wait_opts *wo, struct task_struct *p) bool pid_child_should_wake(struct wait_opts *wo, struct task_struct *p)
{ {
if (!eligible_pid(wo, p)) if (!eligible_pid(wo, p))
return false; return false;
@ -1590,7 +1572,7 @@ static int do_wait_pid(struct wait_opts *wo)
return 0; return 0;
} }
static long __do_wait(struct wait_opts *wo) long __do_wait(struct wait_opts *wo)
{ {
long retval; long retval;
@ -1662,9 +1644,9 @@ static long do_wait(struct wait_opts *wo)
return retval; return retval;
} }
static int kernel_waitid_prepare(struct wait_opts *wo, int which, pid_t upid, int kernel_waitid_prepare(struct wait_opts *wo, int which, pid_t upid,
struct waitid_info *infop, int options, struct waitid_info *infop, int options,
struct rusage *ru) struct rusage *ru)
{ {
unsigned int f_flags = 0; unsigned int f_flags = 0;
struct pid *pid = NULL; struct pid *pid = NULL;

30
kernel/exit.h Normal file
View File

@ -0,0 +1,30 @@
// SPDX-License-Identifier: GPL-2.0-only
#ifndef LINUX_WAITID_H
#define LINUX_WAITID_H
struct waitid_info {
pid_t pid;
uid_t uid;
int status;
int cause;
};
struct wait_opts {
enum pid_type wo_type;
int wo_flags;
struct pid *wo_pid;
struct waitid_info *wo_info;
int wo_stat;
struct rusage *wo_rusage;
wait_queue_entry_t child_wait;
int notask_error;
};
bool pid_child_should_wake(struct wait_opts *wo, struct task_struct *p);
long __do_wait(struct wait_opts *wo);
int kernel_waitid_prepare(struct wait_opts *wo, int which, pid_t upid,
struct waitid_info *infop, int options,
struct rusage *ru);
#endif