1 /* SPDX-License-Identifier: GPL-2.0-only */
44 static inline int copy_from_sockptr_offset(void *dst, sockptr_t src,  in copy_from_sockptr_offset()  argument
47 	if (!sockptr_is_kernel(src))  in copy_from_sockptr_offset()
48 		return copy_from_user(dst, src.user + offset, size);  in copy_from_sockptr_offset()
49 	memcpy(dst, src.kernel + offset, size);  in copy_from_sockptr_offset()
59 static inline int copy_from_sockptr(void *dst, sockptr_t src, size_t size)  in copy_from_sockptr()  argument
61 	return copy_from_sockptr_offset(dst, src, 0, size);  in copy_from_sockptr()
73  *  * -EINVAL: @optlen < @ksize
74  *  * -EFAULT: access to userspace failed.
81 		return -EINVAL;  in copy_safe_from_sockptr()
83 		return -EFAULT;  in copy_safe_from_sockptr()
88 		sockptr_t src, size_t usize)  in copy_struct_from_sockptr()  argument
91 	size_t rest = max(ksize, usize) - size;  in copy_struct_from_sockptr()
93 	if (!sockptr_is_kernel(src))  in copy_struct_from_sockptr()
94 		return copy_struct_from_user(dst, ksize, src.user, size);  in copy_struct_from_sockptr()
99 		char *p = src.kernel;  in copy_struct_from_sockptr()
101 		while (rest--) {  in copy_struct_from_sockptr()
103 				return -E2BIG;  in copy_struct_from_sockptr()
106 	memcpy(dst, src.kernel, size);  in copy_struct_from_sockptr()
111 		const void *src, size_t size)  in copy_to_sockptr_offset()  argument
114 		return copy_to_user(dst.user + offset, src, size);  in copy_to_sockptr_offset()
115 	memcpy(dst.kernel + offset, src, size);  in copy_to_sockptr_offset()
119 static inline int copy_to_sockptr(sockptr_t dst, const void *src, size_t size)  in copy_to_sockptr()  argument
121 	return copy_to_sockptr_offset(dst, 0, src, size);  in copy_to_sockptr()
124 static inline void *memdup_sockptr_noprof(sockptr_t src, size_t len)  in memdup_sockptr_noprof()  argument
129 		return ERR_PTR(-ENOMEM);  in memdup_sockptr_noprof()
130 	if (copy_from_sockptr(p, src, len)) {  in memdup_sockptr_noprof()
132 		return ERR_PTR(-EFAULT);  in memdup_sockptr_noprof()
138 static inline void *memdup_sockptr_nul_noprof(sockptr_t src, size_t len)  in memdup_sockptr_nul_noprof()  argument
143 		return ERR_PTR(-ENOMEM);  in memdup_sockptr_nul_noprof()
144 	if (copy_from_sockptr(p, src, len)) {  in memdup_sockptr_nul_noprof()
146 		return ERR_PTR(-EFAULT);  in memdup_sockptr_nul_noprof()
153 static inline long strncpy_from_sockptr(char *dst, sockptr_t src, size_t count)  in strncpy_from_sockptr()  argument
155 	if (sockptr_is_kernel(src)) {  in strncpy_from_sockptr()
156 		size_t len = min(strnlen(src.kernel, count - 1) + 1, count);  in strncpy_from_sockptr()
158 		memcpy(dst, src.kernel, len);  in strncpy_from_sockptr()
161 	return strncpy_from_user(dst, src.user, count);  in strncpy_from_sockptr()
164 static inline int check_zeroed_sockptr(sockptr_t src, size_t offset,  in check_zeroed_sockptr()  argument
167 	if (!sockptr_is_kernel(src))  in check_zeroed_sockptr()
168 		return check_zeroed_user(src.user + offset, size);  in check_zeroed_sockptr()
169 	return memchr_inv(src.kernel + offset, 0, size) == NULL;  in check_zeroed_sockptr()