cregit-Linux how code gets into the kernel

Release 4.7 kernel/configs.c

Directory: kernel
/*
 * kernel/configs.c
 * Echo the kernel .config file used to build the kernel
 *
 * Copyright (C) 2002 Khalid Aziz <khalid_aziz@hp.com>
 * Copyright (C) 2002 Randy Dunlap <rdunlap@xenotime.net>
 * Copyright (C) 2002 Al Stone <ahs3@fc.hp.com>
 * Copyright (C) 2002 Hewlett-Packard Company
 *
 * 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 of the License, 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, GOOD TITLE or
 * NON INFRINGEMENT.  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/kernel.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <asm/uaccess.h>

/**************************************************/
/* the actual current config file                 */

/*
 * Define kernel_config_data and kernel_config_data_size, which contains the
 * wrapped and compressed configuration file.  The file is first compressed
 * with gzip and then bounded by two eight byte magic numbers to allow
 * extraction from a binary kernel image:
 *
 *   IKCFG_ST
 *   <image>
 *   IKCFG_ED
 */

#define MAGIC_START	"IKCFG_ST"

#define MAGIC_END	"IKCFG_ED"
#include "config_data.h"



#define MAGIC_SIZE (sizeof(MAGIC_START) - 1)

#define kernel_config_data_size \
	(sizeof(kernel_config_data) - 1 - MAGIC_SIZE * 2)

#ifdef CONFIG_IKCONFIG_PROC


static ssize_t ikconfig_read_current(struct file *file, char __user *buf, size_t len, loff_t * offset) { return simple_read_from_buffer(buf, len, offset, kernel_config_data + MAGIC_SIZE, kernel_config_data_size); }

Contributors

PersonTokensPropCommitsCommitProp
alan coxalan cox2564.10%120.00%
stephen hemmingerstephen hemminger615.38%120.00%
akinobu mitaakinobu mita512.82%120.00%
andrew mortonandrew morton37.69%240.00%
Total39100.00%5100.00%

static const struct file_operations ikconfig_file_ops = { .owner = THIS_MODULE, .read = ikconfig_read_current, .llseek = default_llseek, };
static int __init ikconfig_init(void) { struct proc_dir_entry *entry; /* create the current config file */ entry = proc_create("config.gz", S_IFREG | S_IRUGO, NULL, &ikconfig_file_ops); if (!entry) return -ENOMEM; proc_set_size(entry, kernel_config_data_size); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
alan coxalan cox2346.00%114.29%
stephen hemmingerstephen hemminger1122.00%114.29%
andrew mortonandrew morton714.00%228.57%
david howellsdavid howells48.00%114.29%
denis v. lunevdenis v. lunev48.00%114.29%
alexey dobriyanalexey dobriyan12.00%114.29%
Total50100.00%7100.00%


static void __exit ikconfig_cleanup(void) { remove_proc_entry("config.gz", NULL); }

Contributors

PersonTokensPropCommitsCommitProp
alan coxalan cox1275.00%133.33%
andrew mortonandrew morton318.75%133.33%
alexey dobriyanalexey dobriyan16.25%133.33%
Total16100.00%3100.00%

module_init(ikconfig_init); module_exit(ikconfig_cleanup); #endif /* CONFIG_IKCONFIG_PROC */ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Randy Dunlap"); MODULE_DESCRIPTION("Echo the kernel .config file used to build the kernel");

Overall Contributors

PersonTokensPropCommitsCommitProp
alan coxalan cox10652.74%17.69%
stephen hemmingerstephen hemminger3517.41%17.69%
andrew mortonandrew morton3517.41%323.08%
akinobu mitaakinobu mita52.49%17.69%
arnd bergmannarnd bergmann52.49%17.69%
denis v. lunevdenis v. lunev41.99%17.69%
david howellsdavid howells41.99%17.69%
stephen boydstephen boyd31.49%17.69%
alexey dobriyanalexey dobriyan21.00%17.69%
helge dellerhelge deller10.50%17.69%
adrian bunkadrian bunk10.50%17.69%
Total201100.00%13100.00%
Directory: kernel
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