137 int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p)  in __scm_send()  argument
143 	for_each_cmsghdr(cmsg, msg) {  in __scm_send()
154 		if (!CMSG_OK(msg, cmsg))  in __scm_send()
220 int put_cmsg(struct msghdr * msg, int level, int type, int len, void *data)  in put_cmsg()  argument
224 	if (msg->msg_flags & MSG_CMSG_COMPAT)  in put_cmsg()
225 		return put_cmsg_compat(msg, level, type, len, data);  in put_cmsg()
227 	if (!msg->msg_control || msg->msg_controllen < sizeof(struct cmsghdr)) {  in put_cmsg()
228 		msg->msg_flags |= MSG_CTRUNC;  in put_cmsg()
231 	if (msg->msg_controllen < cmlen) {  in put_cmsg()
232 		msg->msg_flags |= MSG_CTRUNC;  in put_cmsg()
233 		cmlen = msg->msg_controllen;  in put_cmsg()
236 	if (msg->msg_control_is_user) {  in put_cmsg()
237 		struct cmsghdr __user *cm = msg->msg_control_user;  in put_cmsg()
251 		struct cmsghdr *cm = msg->msg_control;  in put_cmsg()
259 	cmlen = min(CMSG_SPACE(len), msg->msg_controllen);  in put_cmsg()
260 	if (msg->msg_control_is_user)  in put_cmsg()
261 		msg->msg_control_user += cmlen;  in put_cmsg()
263 		msg->msg_control += cmlen;  in put_cmsg()
264 	msg->msg_controllen -= cmlen;  in put_cmsg()
274 void put_cmsg_scm_timestamping64(struct msghdr *msg, struct scm_timestamping_internal *tss_internal)  in put_cmsg_scm_timestamping64()  argument
284 	put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPING_NEW, sizeof(tss), &tss);  in put_cmsg_scm_timestamping64()
288 void put_cmsg_scm_timestamping(struct msghdr *msg, struct scm_timestamping_internal *tss_internal)  in put_cmsg_scm_timestamping()  argument
298 	put_cmsg(msg, SOL_SOCKET, SO_TIMESTAMPING_OLD, sizeof(tss), &tss);  in put_cmsg_scm_timestamping()
302 static int scm_max_fds(struct msghdr *msg)  in scm_max_fds()  argument
304 	if (msg->msg_controllen <= sizeof(struct cmsghdr))  in scm_max_fds()
306 	return (msg->msg_controllen - sizeof(struct cmsghdr)) / sizeof(int);  in scm_max_fds()
309 void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm)  in scm_detach_fds()  argument
312 		(__force struct cmsghdr __user *)msg->msg_control_user;  in scm_detach_fds()
313 	unsigned int o_flags = (msg->msg_flags & MSG_CMSG_CLOEXEC) ? O_CLOEXEC : 0;  in scm_detach_fds()
314 	int fdmax = min_t(int, scm_max_fds(msg), scm->fp->count);  in scm_detach_fds()
319 	if (WARN_ON_ONCE(!msg->msg_control_is_user))  in scm_detach_fds()
322 	if (msg->msg_flags & MSG_CMSG_COMPAT) {  in scm_detach_fds()
323 		scm_detach_fds_compat(msg, scm);  in scm_detach_fds()
343 			if (msg->msg_controllen < cmlen)  in scm_detach_fds()
344 				cmlen = msg->msg_controllen;  in scm_detach_fds()
345 			msg->msg_control_user += cmlen;  in scm_detach_fds()
346 			msg->msg_controllen -= cmlen;  in scm_detach_fds()
351 		msg->msg_flags |= MSG_CTRUNC;  in scm_detach_fds()