OpenCloudOS-Kernel/include/linux/xfork.h

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _XFORK_H
#define _XFORK_H

struct mm_struct;
struct vm_area_struct;

#ifdef CONFIG_XFORK
#define get_xfork_mm(mm) ((struct mm_struct *)(mm->kabi_reserved1))
#define set_xfork_mm(mm, val) (mm->kabi_reserved1 = (unsigned long)val)

#define get_xfork_vma(vma) ((struct vm_area_struct *)(vma->kabi_reserved1))
#define set_xfork_vma(vma, val) (vma->kabi_reserved1 = (unsigned long)val)
int memcg_xfork_enable(struct task_struct *p);

int xfork_quick_copy_page_range(struct vm_area_struct *dst_vma,
				struct vm_area_struct *src_vma);

bool pmd_wrprotect_by_xfork(pmd_t pmd);

void xfork_fixup_pmd(struct vm_area_struct *mpnt, pmd_t *pmd, unsigned long addr);

void xfork_wait_vma_copy_done(struct vm_area_struct *vma);

void xfork_copy_update(void);

void xfork_copy_cleanup(struct mm_struct *mm);

void xfork_copy_handshake(struct mm_struct *parent, struct mm_struct *child, int val);
#else
#define get_xfork_mm(mm) do { } while (0)
#define set_xfork_mm(mm, val) do { } while (0)

#define get_xfork_vma(vma) do { } while (0)
#define set_xfork_vma(vma, val) do { } while (0)
static inline int __maybe_unused memcg_xfork_enable(struct task_struct *p)
{
	return 0;
}

static inline int __maybe_unused xfork_quick_copy_page_range(struct vm_area_struct *dst_vma,
							     struct vm_area_struct *src_vma)
{
	return 0;
}

static bool __maybe_unused pmd_wrprotect_by_xfork(pmd_t pmd)
{
	return false;
}

static inline void __maybe_unused xfork_fixup_pmd(struct vm_area_struct *mpnt,
						  pmd_t *pmd, unsigned long addr)
{
}

static inline void __maybe_unused xfork_wait_vma_copy_done(struct vm_area_struct *vma)
{
}

static inline void __maybe_unused xfork_copy_update(void)
{
}

static inline void __maybe_unused xfork_copy_cleanup(struct mm_struct *mm)
{
}

static void __maybe_unused xfork_copy_handshake(struct mm_struct *parent,
						struct mm_struct *child, int val)
{
}

#endif
#endif