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3f67987cdc
The syscall user dispatch configuration can only be set by the task itself, but lacks a ptrace set/get interface which makes it impossible to implement checkpoint/restore for it. Add the required ptrace requests and the get/set functions in the syscall user dispatch code to make that possible. Signed-off-by: Gregory Price <gregory.price@memverge.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Link: https://lore.kernel.org/r/20230407171834.3558-4-gregory.price@memverge.com
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 Collabora Ltd.
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*/
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#ifndef _SYSCALL_USER_DISPATCH_H
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#define _SYSCALL_USER_DISPATCH_H
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#include <linux/thread_info.h>
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#ifdef CONFIG_GENERIC_ENTRY
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struct syscall_user_dispatch {
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char __user *selector;
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unsigned long offset;
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unsigned long len;
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bool on_dispatch;
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};
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int set_syscall_user_dispatch(unsigned long mode, unsigned long offset,
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unsigned long len, char __user *selector);
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#define clear_syscall_work_syscall_user_dispatch(tsk) \
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clear_task_syscall_work(tsk, SYSCALL_USER_DISPATCH)
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int syscall_user_dispatch_get_config(struct task_struct *task, unsigned long size,
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void __user *data);
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int syscall_user_dispatch_set_config(struct task_struct *task, unsigned long size,
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void __user *data);
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#else
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struct syscall_user_dispatch {};
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static inline int set_syscall_user_dispatch(unsigned long mode, unsigned long offset,
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unsigned long len, char __user *selector)
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{
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return -EINVAL;
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}
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static inline void clear_syscall_work_syscall_user_dispatch(struct task_struct *tsk)
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{
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}
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static inline int syscall_user_dispatch_get_config(struct task_struct *task,
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unsigned long size, void __user *data)
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{
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return -EINVAL;
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}
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static inline int syscall_user_dispatch_set_config(struct task_struct *task,
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unsigned long size, void __user *data)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_GENERIC_ENTRY */
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#endif /* _SYSCALL_USER_DISPATCH_H */
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