/* SPDX-License-Identifier: GPL-2.0-only *//* A pointer that can point to either kernel or userspace memory. */#ifndef _LINUX_BPFPTR_H#define _LINUX_BPFPTR_H #include <linux/mm.h>#include <linux/sockptr.h> typedef sockptr_t bpfptr_t; static inline bool bpfptr_is_kernel(bpfptr_t bpfptr){	return bpfptr.is_kernel;} static inline bpfptr_t KERNEL_BPFPTR(void *p){	return (bpfptr_t) { .kernel = p, .is_kernel = true };} static inline bpfptr_t USER_BPFPTR(void __user *p){	return (bpfptr_t) { .user = p };} static inline bpfptr_t make_bpfptr(u64 addr, bool is_kernel){	if (is_kernel)		return KERNEL_BPFPTR((void*) (uintptr_t) addr);	else		return USER_BPFPTR(u64_to_user_ptr(addr));} static inline bool bpfptr_is_null(bpfptr_t bpfptr){	if (bpfptr_is_kernel(bpfptr))		return !bpfptr.kernel;	return !bpfptr.user;} static inline void bpfptr_add(bpfptr_t *bpfptr, size_t val){	if (bpfptr_is_kernel(*bpfptr))		bpfptr->kernel += val;	else		bpfptr->user += val;} static inline int copy_from_bpfptr_offset(void *dst, bpfptr_t src,					  size_t offset, size_t size){	return copy_from_sockptr_offset(dst, (sockptr_t) src, offset, size);} static inline int copy_from_bpfptr(void *dst, bpfptr_t src, size_t size){	return copy_from_bpfptr_offset(dst, src, 0, size);} static inline int copy_to_bpfptr_offset(bpfptr_t dst, size_t offset,					const void *src, size_t size){	return copy_to_sockptr_offset((sockptr_t) dst, offset, src, size);} static inline void *kvmemdup_bpfptr(bpfptr_t src, size_t len){	void *p = kvmalloc(len, GFP_USER | __GFP_NOWARN); 	if (!p)		return ERR_PTR(-ENOMEM);	if (copy_from_bpfptr(p, src, len)) {		kvfree(p);		return ERR_PTR(-EFAULT);	}	return p;} static inline long strncpy_from_bpfptr(char *dst, bpfptr_t src, size_t count){	return strncpy_from_sockptr(dst, (sockptr_t) src, count);} #endif /* _LINUX_BPFPTR_H */