forked from luck/tmp_suning_uos_patched
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
/*
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* linux/drivers/net/netconsole.c
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*
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* Copyright (C) 2001 Ingo Molnar <mingo@redhat.com>
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*
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* This file contains the implementation of an IRQ-safe, crash-safe
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* kernel console implementation that outputs kernel messages to the
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* network.
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*
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* Modification history:
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*
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* 2001-09-17 started by Ingo Molnar.
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* 2003-08-11 2.6 port by Matt Mackall
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* simplified options
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* generic card hooks
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* works non-modular
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* 2003-09-07 rewritten with netpoll api
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*/
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/****************************************************************
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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****************************************************************/
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/console.h>
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#include <linux/moduleparam.h>
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#include <linux/string.h>
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#include <linux/netpoll.h>
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MODULE_AUTHOR("Maintainer: Matt Mackall <mpm@selenic.com>");
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MODULE_DESCRIPTION("Console driver for network interfaces");
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MODULE_LICENSE("GPL");
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#define MAX_PARAM_LENGTH 256
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#define MAX_PRINT_CHUNK 1000
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static char config[MAX_PARAM_LENGTH];
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module_param_string(netconsole, config, MAX_PARAM_LENGTH, 0);
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MODULE_PARM_DESC(netconsole, " netconsole=[src-port]@[src-ip]/[dev],[tgt-port]@<tgt-ip>/[tgt-macaddr]\n");
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#ifndef MODULE
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static int __init option_setup(char *opt)
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{
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strlcpy(config, opt, MAX_PARAM_LENGTH);
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return 1;
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}
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__setup("netconsole=", option_setup);
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#endif /* MODULE */
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static struct netpoll np = {
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.name = "netconsole",
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.dev_name = "eth0",
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.local_port = 6665,
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.remote_port = 6666,
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.remote_mac = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
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};
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static void write_msg(struct console *con, const char *msg, unsigned int len)
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{
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int frag, left;
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unsigned long flags;
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local_irq_save(flags);
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for (left = len; left;) {
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frag = min(left, MAX_PRINT_CHUNK);
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netpoll_send_udp(&np, msg, frag);
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msg += frag;
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left -= frag;
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}
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local_irq_restore(flags);
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}
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static struct console netconsole = {
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.name = "netcon",
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.flags = CON_ENABLED | CON_PRINTBUFFER,
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.write = write_msg,
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};
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static int __init init_netconsole(void)
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{
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int err = 0;
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if (!strnlen(config, MAX_PARAM_LENGTH)) {
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printk(KERN_INFO "netconsole: not configured, aborting\n");
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goto out;
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}
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err = netpoll_parse_options(&np, config);
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if (err)
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goto out;
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err = netpoll_setup(&np);
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if (err)
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goto out;
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register_console(&netconsole);
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printk(KERN_INFO "netconsole: network logging started\n");
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out:
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return err;
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}
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static void __exit cleanup_netconsole(void)
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{
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unregister_console(&netconsole);
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netpoll_cleanup(&np);
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}
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module_init(init_netconsole);
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module_exit(cleanup_netconsole);
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