1 // SPDX-License-Identifier: GPL-2.0
4  * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
17 	 * With uts namespaces, uts information becomes process-specific, so
48 	msg.msg_name = &(req->origin);  in mconsole_reply_v0()
49 	msg.msg_namelen = req->originlen;  in mconsole_reply_v0()
56 	return sendmsg(req->originating_fd, &msg, 0);  in mconsole_reply_v0()
66 		if (!strncmp(req->request.data, cmd->command,  in mconsole_parse()
67 			    strlen(cmd->command))) {  in mconsole_parse()
85 	req->originlen = sizeof(req->origin);  in mconsole_get_request()
86 	req->len = recvfrom(fd, &req->request, sizeof(req->request), 0,  in mconsole_get_request()
87 			    (struct sockaddr *) req->origin, &req->originlen);  in mconsole_get_request()
88 	if (req->len < 0)  in mconsole_get_request()
91 	req->originating_fd = fd;  in mconsole_get_request()
93 	if (req->request.magic != MCONSOLE_MAGIC) {  in mconsole_get_request()
95 		len = MIN(sizeof(req->request.data) - 1,  in mconsole_get_request()
96 			  strlen((char *) &req->request));  in mconsole_get_request()
97 		memmove(req->request.data, &req->request, len);  in mconsole_get_request()
98 		req->request.data[len] = '\0';  in mconsole_get_request()
100 		req->request.magic = MCONSOLE_MAGIC;  in mconsole_get_request()
101 		req->request.version = 0;  in mconsole_get_request()
102 		req->request.len = len;  in mconsole_get_request()
109 	if (req->request.len >= MCONSOLE_MAX_DATA) {  in mconsole_get_request()
113 	if (req->request.version != MCONSOLE_VERSION) {  in mconsole_get_request()
118 	req->request.data[req->request.len] = '\0';  in mconsole_get_request()
119 	req->cmd = mconsole_parse(req);  in mconsole_get_request()
120 	if (req->cmd == NULL) {  in mconsole_get_request()
142 		/* err can only be true on the first packet */  in mconsole_reply_len()
145 		len = MIN(total, MCONSOLE_MAX_DATA - 1);  in mconsole_reply_len()
152 		total -= len;  in mconsole_reply_len()
156 		len = sizeof(reply) + reply.len - sizeof(reply.data);  in mconsole_reply_len()
158 		n = sendto(req->originating_fd, &reply, len, 0,  in mconsole_reply_len()
159 			   (struct sockaddr *) req->origin, req->originlen);  in mconsole_reply_len()
162 			return -errno;  in mconsole_reply_len()
179 static int notify_sock = -1;
184 	struct mconsole_notify packet;  in mconsole_notify()  local
191 			err = -errno;  in mconsole_notify()
192 			printk(UM_KERN_ERR "mconsole_notify - socket failed, "  in mconsole_notify()
204 	packet.magic = MCONSOLE_MAGIC;  in mconsole_notify()
205 	packet.version = MCONSOLE_VERSION;  in mconsole_notify()
206 	packet.type = type;  in mconsole_notify()
207 	len = (len > sizeof(packet.data)) ? sizeof(packet.data) : len;  in mconsole_notify()
208 	packet.len = len;  in mconsole_notify()
209 	memcpy(packet.data, data, len);  in mconsole_notify()
212 	len = sizeof(packet) + packet.len - sizeof(packet.data);  in mconsole_notify()
213 	n = sendto(notify_sock, &packet, len, 0, (struct sockaddr *) &target,  in mconsole_notify()
216 		err = -errno;  in mconsole_notify()
217 		printk(UM_KERN_ERR "mconsole_notify - sendto failed, "  in mconsole_notify()