Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 215 insertions, 0 deletions

diff --git a/arch/um/drivers/mconsole_user.c b/arch/um/drivers/mconsole_user.c
new file mode 100644
index 000000000000..fe5afb13252c
--- /dev/null
+++ b/arch/um/drivers/mconsole_user.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org)
+ * Copyright (C) 2001 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <signal.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include "user.h"
+#include "mconsole.h"
+#include "umid.h"
+
+static struct mconsole_command commands[] = {
+	{ "version", mconsole_version, MCONSOLE_INTR },
+	{ "halt", mconsole_halt, MCONSOLE_PROC },
+	{ "reboot", mconsole_reboot, MCONSOLE_PROC },
+	{ "config", mconsole_config, MCONSOLE_PROC },
+	{ "remove", mconsole_remove, MCONSOLE_PROC },
+	{ "sysrq", mconsole_sysrq, MCONSOLE_INTR },
+	{ "help", mconsole_help, MCONSOLE_INTR },
+	{ "cad", mconsole_cad, MCONSOLE_INTR },
+	{ "stop", mconsole_stop, MCONSOLE_PROC },
+	{ "go", mconsole_go, MCONSOLE_INTR },
+	{ "log", mconsole_log, MCONSOLE_INTR },
+	{ "proc", mconsole_proc, MCONSOLE_PROC },
+};
+
+/* Initialized in mconsole_init, which is an initcall */
+char mconsole_socket_name[256];
+
+int mconsole_reply_v0(struct mc_request *req, char *reply)
+{
+        struct iovec iov;
+        struct msghdr msg;
+
+        iov.iov_base = reply;
+        iov.iov_len = strlen(reply);
+
+        msg.msg_name = &(req->origin);
+        msg.msg_namelen = req->originlen;
+        msg.msg_iov = &iov;
+        msg.msg_iovlen = 1;
+        msg.msg_control = NULL;
+        msg.msg_controllen = 0;
+        msg.msg_flags = 0;
+
+        return sendmsg(req->originating_fd, &msg, 0);
+}
+
+static struct mconsole_command *mconsole_parse(struct mc_request *req)
+{
+	struct mconsole_command *cmd;
+	int i;
+
+	for(i=0;i<sizeof(commands)/sizeof(commands[0]);i++){
+		cmd = &commands[i];
+		if(!strncmp(req->request.data, cmd->command, 
+			    strlen(cmd->command))){
+			return(cmd);
+		}
+	}
+	return(NULL);
+}
+
+#define MIN(a,b) ((a)<(b) ? (a):(b))
+
+#define STRINGX(x) #x
+#define STRING(x) STRINGX(x)
+
+int mconsole_get_request(int fd, struct mc_request *req)
+{
+	int len;
+
+	req->originlen = sizeof(req->origin);
+	req->len = recvfrom(fd, &req->request, sizeof(req->request), 0,
+			    (struct sockaddr *) req->origin, &req->originlen);
+	if (req->len < 0)
+		return 0;
+
+	req->originating_fd = fd;
+
+	if(req->request.magic != MCONSOLE_MAGIC){
+		/* Unversioned request */
+		len = MIN(sizeof(req->request.data) - 1, 
+			  strlen((char *) &req->request));
+		memmove(req->request.data, &req->request, len);
+		req->request.data[len] = '\0';
+
+		req->request.magic = MCONSOLE_MAGIC;
+		req->request.version = 0;
+		req->request.len = len;
+
+		mconsole_reply_v0(req, "ERR Version 0 mconsole clients are "
+				  "not supported by this driver");
+		return(0);
+	}
+
+	if(req->request.len >= MCONSOLE_MAX_DATA){
+		mconsole_reply(req, "Request too large", 1, 0);
+		return(0);
+	}
+	if(req->request.version != MCONSOLE_VERSION){
+		mconsole_reply(req, "This driver only supports version " 
+                               STRING(MCONSOLE_VERSION) " clients", 1, 0);
+	}
+	
+	req->request.data[req->request.len] = '\0';
+	req->cmd = mconsole_parse(req);
+	if(req->cmd == NULL){
+		mconsole_reply(req, "Unknown command", 1, 0);
+		return(0);
+	}
+
+	return(1);
+}
+
+int mconsole_reply(struct mc_request *req, char *str, int err, int more)
+{
+	struct mconsole_reply reply;
+	int total, len, n;
+
+	total = strlen(str);
+	do {
+		reply.err = err;
+
+		/* err can only be true on the first packet */
+		err = 0;
+
+		len = MIN(total, MCONSOLE_MAX_DATA - 1);
+
+		if(len == total) reply.more = more;
+		else reply.more = 1;
+
+		memcpy(reply.data, str, len);
+		reply.data[len] = '\0';
+		total -= len;
+		str += len;
+		reply.len = len + 1;
+
+		len = sizeof(reply) + reply.len - sizeof(reply.data);
+
+		n = sendto(req->originating_fd, &reply, len, 0,
+			   (struct sockaddr *) req->origin, req->originlen);
+
+		if(n < 0) return(-errno);
+	} while(total > 0);
+	return(0);
+}
+
+int mconsole_unlink_socket(void)
+{
+	unlink(mconsole_socket_name);
+	return 0;
+}
+
+static int notify_sock = -1;
+
+int mconsole_notify(char *sock_name, int type, const void *data, int len)
+{
+	struct sockaddr_un target;
+	struct mconsole_notify packet;
+	int n, err = 0;
+
+	lock_notify();
+	if(notify_sock < 0){
+		notify_sock = socket(PF_UNIX, SOCK_DGRAM, 0);
+		if(notify_sock < 0){
+			printk("mconsole_notify - socket failed, errno = %d\n",
+			       errno);
+			err = -errno;
+		}
+	}
+	unlock_notify();
+	
+	if(err)
+		return(err);
+
+	target.sun_family = AF_UNIX;
+	strcpy(target.sun_path, sock_name);
+
+	packet.magic = MCONSOLE_MAGIC;
+	packet.version = MCONSOLE_VERSION;
+	packet.type = type;
+	len = (len > sizeof(packet.data)) ? sizeof(packet.data) : len;
+	packet.len = len;
+	memcpy(packet.data, data, len);
+
+	err = 0;
+	len = sizeof(packet) + packet.len - sizeof(packet.data);
+	n = sendto(notify_sock, &packet, len, 0, (struct sockaddr *) &target, 
+		   sizeof(target));
+	if(n < 0){
+		printk("mconsole_notify - sendto failed, errno = %d\n", errno);
+		err = -errno;
+	}
+	return(err);
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */