2 * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org)
3 * Copyright (C) 2001 - 2003 Jeff Dike (jdike@addtoit.com)
4 * Licensed under the GPL
11 #include <sys/socket.h>
12 #include <sys/types.h>
20 static struct mconsole_command commands[] = {
21 { "version", mconsole_version, MCONSOLE_INTR },
22 { "halt", mconsole_halt, MCONSOLE_PROC },
23 { "reboot", mconsole_reboot, MCONSOLE_PROC },
24 { "config", mconsole_config, MCONSOLE_PROC },
25 { "remove", mconsole_remove, MCONSOLE_PROC },
26 { "sysrq", mconsole_sysrq, MCONSOLE_INTR },
27 { "help", mconsole_help, MCONSOLE_INTR },
28 { "cad", mconsole_cad, MCONSOLE_INTR },
29 { "stop", mconsole_stop, MCONSOLE_PROC },
30 { "go", mconsole_go, MCONSOLE_INTR },
31 { "log", mconsole_log, MCONSOLE_INTR },
32 { "proc", mconsole_proc, MCONSOLE_PROC },
33 { "stack", mconsole_stack, MCONSOLE_INTR },
36 /* Initialized in mconsole_init, which is an initcall */
37 char mconsole_socket_name[256];
39 int mconsole_reply_v0(struct mc_request *req, char *reply)
45 iov.iov_len = strlen(reply);
47 msg.msg_name = &(req->origin);
48 msg.msg_namelen = req->originlen;
51 msg.msg_control = NULL;
52 msg.msg_controllen = 0;
55 return sendmsg(req->originating_fd, &msg, 0);
58 static struct mconsole_command *mconsole_parse(struct mc_request *req)
60 struct mconsole_command *cmd;
63 for(i=0;i<sizeof(commands)/sizeof(commands[0]);i++){
65 if(!strncmp(req->request.data, cmd->command,
66 strlen(cmd->command))){
73 #define MIN(a,b) ((a)<(b) ? (a):(b))
76 #define STRING(x) STRINGX(x)
78 int mconsole_get_request(int fd, struct mc_request *req)
82 req->originlen = sizeof(req->origin);
83 req->len = recvfrom(fd, &req->request, sizeof(req->request), 0,
84 (struct sockaddr *) req->origin, &req->originlen);
88 req->originating_fd = fd;
90 if(req->request.magic != MCONSOLE_MAGIC){
91 /* Unversioned request */
92 len = MIN(sizeof(req->request.data) - 1,
93 strlen((char *) &req->request));
94 memmove(req->request.data, &req->request, len);
95 req->request.data[len] = '\0';
97 req->request.magic = MCONSOLE_MAGIC;
98 req->request.version = 0;
99 req->request.len = len;
101 mconsole_reply_v0(req, "ERR Version 0 mconsole clients are "
102 "not supported by this driver");
106 if(req->request.len >= MCONSOLE_MAX_DATA){
107 mconsole_reply(req, "Request too large", 1, 0);
110 if(req->request.version != MCONSOLE_VERSION){
111 mconsole_reply(req, "This driver only supports version "
112 STRING(MCONSOLE_VERSION) " clients", 1, 0);
115 req->request.data[req->request.len] = '\0';
116 req->cmd = mconsole_parse(req);
117 if(req->cmd == NULL){
118 mconsole_reply(req, "Unknown command", 1, 0);
125 int mconsole_reply_len(struct mc_request *req, const char *str, int total,
128 struct mconsole_reply reply;
134 /* err can only be true on the first packet */
137 len = MIN(total, MCONSOLE_MAX_DATA - 1);
139 if(len == total) reply.more = more;
142 memcpy(reply.data, str, len);
143 reply.data[len] = '\0';
148 len = sizeof(reply) + reply.len - sizeof(reply.data);
150 n = sendto(req->originating_fd, &reply, len, 0,
151 (struct sockaddr *) req->origin, req->originlen);
153 if(n < 0) return(-errno);
158 int mconsole_reply(struct mc_request *req, const char *str, int err, int more)
160 return mconsole_reply_len(req, str, strlen(str), err, more);
164 int mconsole_unlink_socket(void)
166 unlink(mconsole_socket_name);
170 static int notify_sock = -1;
172 int mconsole_notify(char *sock_name, int type, const void *data, int len)
174 struct sockaddr_un target;
175 struct mconsole_notify packet;
180 notify_sock = socket(PF_UNIX, SOCK_DGRAM, 0);
183 printk("mconsole_notify - socket failed, errno = %d\n",
192 target.sun_family = AF_UNIX;
193 strcpy(target.sun_path, sock_name);
195 packet.magic = MCONSOLE_MAGIC;
196 packet.version = MCONSOLE_VERSION;
198 len = (len > sizeof(packet.data)) ? sizeof(packet.data) : len;
200 memcpy(packet.data, data, len);
203 len = sizeof(packet) + packet.len - sizeof(packet.data);
204 n = sendto(notify_sock, &packet, len, 0, (struct sockaddr *) &target,
208 printk("mconsole_notify - sendto failed, errno = %d\n", errno);
214 * Overrides for Emacs so that we follow Linus's tabbing style.
215 * Emacs will notice this stuff at the end of the file and automatically
216 * adjust the settings for this buffer only. This must remain at the end
218 * ---------------------------------------------------------------------------
220 * c-file-style: "linux"