d2b60881e2
Based upon initial work by Keiichi Kii <k-keiichi@bx.jp.nec.com>. Presently, boot/module parameters are set up quite differently for the case of built-in netconsole (__setup() -> obsolete_checksetup() -> netpoll_parse_options() -> strlen(config) == 0 in init_netconsole()) vs modular netconsole (module_param_string() -> string copied to the config variable -> strlen(config) != 0 init_netconsole() -> netpoll_parse_options()). This patch makes both of them similar by doing exactly the equivalent of a module_param_string() in option_setup() also -- just copying the param string passed from the kernel command line into "config" variable. So, strlen(config) != 0 in both cases, and netpoll_parse_options() is always called from init_netconsole(), thus making the setup logic for both cases similar. Now, option_setup() is only ever called / used for the built-in case, so we put it inside a #ifndef MODULE, otherwise gcc will complain about option_setup() being "defined but not used". Also, the "configured" variable is redundant with this patch and hence removed. Signed-off-by: Satyam Sharma <satyam@infradead.org> Signed-off-by: Keiichi Kii <k-keiichi@bx.jp.nec.com> Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
128 lines
3.3 KiB
C
128 lines
3.3 KiB
C
/*
|
|
* linux/drivers/net/netconsole.c
|
|
*
|
|
* Copyright (C) 2001 Ingo Molnar <mingo@redhat.com>
|
|
*
|
|
* This file contains the implementation of an IRQ-safe, crash-safe
|
|
* kernel console implementation that outputs kernel messages to the
|
|
* network.
|
|
*
|
|
* Modification history:
|
|
*
|
|
* 2001-09-17 started by Ingo Molnar.
|
|
* 2003-08-11 2.6 port by Matt Mackall
|
|
* simplified options
|
|
* generic card hooks
|
|
* works non-modular
|
|
* 2003-09-07 rewritten with netpoll api
|
|
*/
|
|
|
|
/****************************************************************
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
****************************************************************/
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/console.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/string.h>
|
|
#include <linux/netpoll.h>
|
|
|
|
MODULE_AUTHOR("Maintainer: Matt Mackall <mpm@selenic.com>");
|
|
MODULE_DESCRIPTION("Console driver for network interfaces");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#define MAX_PARAM_LENGTH 256
|
|
#define MAX_PRINT_CHUNK 1000
|
|
|
|
static char config[MAX_PARAM_LENGTH];
|
|
module_param_string(netconsole, config, MAX_PARAM_LENGTH, 0);
|
|
MODULE_PARM_DESC(netconsole, " netconsole=[src-port]@[src-ip]/[dev],[tgt-port]@<tgt-ip>/[tgt-macaddr]\n");
|
|
|
|
#ifndef MODULE
|
|
static int __init option_setup(char *opt)
|
|
{
|
|
strlcpy(config, opt, MAX_PARAM_LENGTH);
|
|
return 1;
|
|
}
|
|
__setup("netconsole=", option_setup);
|
|
#endif /* MODULE */
|
|
|
|
static struct netpoll np = {
|
|
.name = "netconsole",
|
|
.dev_name = "eth0",
|
|
.local_port = 6665,
|
|
.remote_port = 6666,
|
|
.remote_mac = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
|
|
};
|
|
|
|
static void write_msg(struct console *con, const char *msg, unsigned int len)
|
|
{
|
|
int frag, left;
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
|
|
for (left = len; left;) {
|
|
frag = min(left, MAX_PRINT_CHUNK);
|
|
netpoll_send_udp(&np, msg, frag);
|
|
msg += frag;
|
|
left -= frag;
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static struct console netconsole = {
|
|
.name = "netcon",
|
|
.flags = CON_ENABLED | CON_PRINTBUFFER,
|
|
.write = write_msg,
|
|
};
|
|
|
|
static int __init init_netconsole(void)
|
|
{
|
|
int err = 0;
|
|
|
|
if (!strnlen(config, MAX_PARAM_LENGTH)) {
|
|
printk(KERN_INFO "netconsole: not configured, aborting\n");
|
|
goto out;
|
|
}
|
|
|
|
err = netpoll_parse_options(&np, config);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = netpoll_setup(&np);
|
|
if (err)
|
|
goto out;
|
|
|
|
register_console(&netconsole);
|
|
printk(KERN_INFO "netconsole: network logging started\n");
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static void __exit cleanup_netconsole(void)
|
|
{
|
|
unregister_console(&netconsole);
|
|
netpoll_cleanup(&np);
|
|
}
|
|
|
|
module_init(init_netconsole);
|
|
module_exit(cleanup_netconsole);
|