cregit-Linux how code gets into the kernel

Release 4.7 kernel/ksysfs.c

Directory: kernel
/*
 * kernel/ksysfs.c - sysfs attributes in /sys/kernel, which
 *                   are not related to any other subsystem
 *
 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
 * 
 * This file is release under the GPLv2
 *
 */

#include <linux/kobject.h>
#include <linux/string.h>
#include <linux/sysfs.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/kexec.h>
#include <linux/profile.h>
#include <linux/stat.h>
#include <linux/sched.h>
#include <linux/capability.h>
#include <linux/compiler.h>

#include <linux/rcupdate.h>	/* rcu_expedited and rcu_normal */


#define KERNEL_ATTR_RO(_name) \
static struct kobj_attribute _name##_attr = __ATTR_RO(_name)


#define KERNEL_ATTR_RW(_name) \
static struct kobj_attribute _name##_attr = \
        __ATTR(_name, 0644, _name##_show, _name##_store)

/* current uevent sequence number */



static ssize_t uevent_seqnum_show(struct kobject *kobj,
				  struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "%llu\n", (unsigned long long)uevent_seqnum);
}

Contributors
PersonTokensPropCommitsCommitProp
kay sieverskay sievers2982.86%466.67%


andrew mortonandrew morton514.29%116.67%


greg kroah-hartmangreg kroah-hartman12.86%116.67%


Total35100.00%6100.00%




KERNEL_ATTR_RO(uevent_seqnum);

#ifdef CONFIG_UEVENT_HELPER
/* uevent helper program, used during early boot */



static ssize_t uevent_helper_show(struct kobject *kobj,
				  struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "%s\n", uevent_helper);
}

Contributors
PersonTokensPropCommitsCommitProp
kay sieverskay sievers30100.00%3100.00%


Total30100.00%3100.00%






static ssize_t uevent_helper_store(struct kobject *kobj,
				   struct kobj_attribute *attr,
				   const char *buf, size_t count)
{
	if (count+1 > UEVENT_HELPER_PATH_LEN)
		return -ENOENT;
	memcpy(uevent_helper, buf, count);
	uevent_helper[count] = '\0';
	if (count && uevent_helper[count-1] == '\n')
		uevent_helper[count-1] = '\0';
	return count;
}

Contributors
PersonTokensPropCommitsCommitProp
kay sieverskay sievers77100.00%3100.00%


Total77100.00%3100.00%




KERNEL_ATTR_RW(uevent_helper);
#endif

#ifdef CONFIG_PROFILING



static ssize_t profiling_show(struct kobject *kobj,
				  struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", prof_on);
}

Contributors
PersonTokensPropCommitsCommitProp
dave hansendave hansen30100.00%1100.00%


Total30100.00%1100.00%






static ssize_t profiling_store(struct kobject *kobj,
				   struct kobj_attribute *attr,
				   const char *buf, size_t count)
{
	int ret;

	if (prof_on)
		return -EEXIST;
	/*
         * This eventually calls into get_option() which
         * has a ton of callers and is not const.  It is
         * easiest to cast it away here.
         */
	profile_setup((char *)buf);
	ret = profile_init();
	if (ret)
		return ret;
	ret = create_proc_profile();
	if (ret)
		return ret;
	return count;
}

Contributors
PersonTokensPropCommitsCommitProp
dave hansendave hansen72100.00%1100.00%


Total72100.00%1100.00%




KERNEL_ATTR_RW(profiling);
#endif

#ifdef CONFIG_KEXEC_CORE



static ssize_t kexec_loaded_show(struct kobject *kobj,
				 struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", !!kexec_image);
}

Contributors
PersonTokensPropCommitsCommitProp
jeff moyerjeff moyer2371.88%150.00%


kay sieverskay sievers928.12%150.00%


Total32100.00%2100.00%




KERNEL_ATTR_RO(kexec_loaded);




static ssize_t kexec_crash_loaded_show(struct kobject *kobj,
				       struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", !!kexec_crash_image);
}

Contributors
PersonTokensPropCommitsCommitProp
jeff moyerjeff moyer2371.88%150.00%


kay sieverskay sievers928.12%150.00%


Total32100.00%2100.00%




KERNEL_ATTR_RO(kexec_crash_loaded);




static ssize_t kexec_crash_size_show(struct kobject *kobj,
				       struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "%zu\n", crash_get_memory_size());
}

Contributors
PersonTokensPropCommitsCommitProp
americo wangamerico wang31100.00%1100.00%


Total31100.00%1100.00%






static ssize_t kexec_crash_size_store(struct kobject *kobj,
				   struct kobj_attribute *attr,
				   const char *buf, size_t count)
{
	unsigned long cnt;
	int ret;

	if (kstrtoul(buf, 0, &cnt))
		return -EINVAL;

	ret = crash_shrink_memory(cnt);
	return ret < 0 ? ret : count;
}

Contributors
PersonTokensPropCommitsCommitProp
americo wangamerico wang6298.41%150.00%


jingoo hanjingoo han11.59%150.00%


Total63100.00%2100.00%




KERNEL_ATTR_RW(kexec_crash_size);




static ssize_t vmcoreinfo_show(struct kobject *kobj,
			       struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "%lx %x\n",
		       paddr_vmcoreinfo_note(),
		       (unsigned int)sizeof(vmcoreinfo_note));
}

Contributors
PersonTokensPropCommitsCommitProp
ken'ichi ohmichiken'ichi ohmichi2767.50%250.00%


kay sieverskay sievers922.50%125.00%


vivek goyalvivek goyal410.00%125.00%


Total40100.00%4100.00%




KERNEL_ATTR_RO(vmcoreinfo);

#endif /* CONFIG_KEXEC_CORE */

/* whether file capabilities are enabled */



static ssize_t fscaps_show(struct kobject *kobj,
				  struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", file_caps_enabled);
}

Contributors
PersonTokensPropCommitsCommitProp
ludwig nusselludwig nussel30100.00%1100.00%


Total30100.00%1100.00%




KERNEL_ATTR_RO(fscaps);

#ifndef CONFIG_TINY_RCU

int rcu_expedited;



static ssize_t rcu_expedited_show(struct kobject *kobj,
				  struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", READ_ONCE(rcu_expedited));
}

Contributors
PersonTokensPropCommitsCommitProp
antti p miettinenantti p miettinen3090.91%150.00%


paul e. mckenneypaul e. mckenney39.09%150.00%


Total33100.00%2100.00%






static ssize_t rcu_expedited_store(struct kobject *kobj,
				   struct kobj_attribute *attr,
				   const char *buf, size_t count)
{
	if (kstrtoint(buf, 0, &rcu_expedited))
		return -EINVAL;

	return count;
}

Contributors
PersonTokensPropCommitsCommitProp
antti p miettinenantti p miettinen43100.00%1100.00%


Total43100.00%1100.00%




KERNEL_ATTR_RW(rcu_expedited);


int rcu_normal;



static ssize_t rcu_normal_show(struct kobject *kobj,
			       struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", READ_ONCE(rcu_normal));
}

Contributors
PersonTokensPropCommitsCommitProp
paul e. mckenneypaul e. mckenney33100.00%1100.00%


Total33100.00%1100.00%






static ssize_t rcu_normal_store(struct kobject *kobj,
				struct kobj_attribute *attr,
				const char *buf, size_t count)
{
	if (kstrtoint(buf, 0, &rcu_normal))
		return -EINVAL;

	return count;
}

Contributors
PersonTokensPropCommitsCommitProp
paul e. mckenneypaul e. mckenney43100.00%1100.00%


Total43100.00%1100.00%




KERNEL_ATTR_RW(rcu_normal);
#endif /* #ifndef CONFIG_TINY_RCU */

/*
 * Make /sys/kernel/notes give the raw contents of our kernel .notes section.
 */
extern const void __start_notes __weak;
extern const void __stop_notes __weak;

#define	notes_size (&__stop_notes - &__start_notes)




static ssize_t notes_read(struct file *filp, struct kobject *kobj,
			  struct bin_attribute *bin_attr,
			  char *buf, loff_t off, size_t count)
{
	memcpy(buf, &__start_notes + off, count);
	return count;
}


Contributors
PersonTokensPropCommitsCommitProp
roland mcgrathroland mcgrath4189.13%150.00%


chris wrightchris wright510.87%150.00%


Total46100.00%2100.00%




static struct bin_attribute notes_attr = {
	.attr = {
		.name = "notes",
		.mode = S_IRUGO,
        },
	.read = &notes_read,
};


struct kobject *kernel_kobj;

EXPORT_SYMBOL_GPL(kernel_kobj);


static struct attribute * kernel_attrs[] = {
	&fscaps_attr.attr,
	&uevent_seqnum_attr.attr,
#ifdef CONFIG_UEVENT_HELPER
	&uevent_helper_attr.attr,
#endif
#ifdef CONFIG_PROFILING
	&profiling_attr.attr,
#endif
#ifdef CONFIG_KEXEC_CORE
	&kexec_loaded_attr.attr,
	&kexec_crash_loaded_attr.attr,
	&kexec_crash_size_attr.attr,
	&vmcoreinfo_attr.attr,
#endif
#ifndef CONFIG_TINY_RCU
	&rcu_expedited_attr.attr,
	&rcu_normal_attr.attr,
#endif
	NULL
};


static struct attribute_group kernel_attr_group = {
	.attrs = kernel_attrs,
};




static int __init ksysfs_init(void)
{
	int error;

	kernel_kobj = kobject_create_and_add("kernel", NULL);
	if (!kernel_kobj) {
		error = -ENOMEM;
		goto exit;
	}
	error = sysfs_create_group(kernel_kobj, &kernel_attr_group);
	if (error)
		goto kset_exit;

	if (notes_size > 0) {
		notes_attr.size = notes_size;
		error = sysfs_create_bin_file(kernel_kobj, &notes_attr);
		if (error)
			goto group_exit;
	}

	return 0;

group_exit:
	sysfs_remove_group(kernel_kobj, &kernel_attr_group);
kset_exit:
	kobject_put(kernel_kobj);
exit:
	return error;
}


Contributors
PersonTokensPropCommitsCommitProp
greg kroah-hartmangreg kroah-hartman5348.62%350.00%


kay sieverskay sievers2926.61%116.67%


roland mcgrathroland mcgrath2321.10%116.67%


dhaval gianidhaval giani43.67%116.67%


Total109100.00%6100.00%




core_initcall(ksysfs_init);

Overall Contributors
PersonTokensPropCommitsCommitProp
kay sieverskay sievers27225.49%412.12%


dave hansendave hansen12511.72%13.03%


roland mcgrathroland mcgrath1059.84%13.03%


paul e. mckenneypaul e. mckenney1049.75%26.06%


americo wangamerico wang1039.65%13.03%


antti p miettinenantti p miettinen868.06%13.03%


jeff moyerjeff moyer767.12%13.03%


greg kroah-hartmangreg kroah-hartman656.09%618.18%


ludwig nusselludwig nussel444.12%13.03%


ken'ichi ohmichiken'ichi ohmichi373.47%26.06%


michael marineaumichael marineau100.94%13.03%


dhaval gianidhaval giani70.66%13.03%


paul gortmakerpaul gortmaker70.66%39.09%


andrew mortonandrew morton50.47%13.03%


chris wrightchris wright50.47%13.03%


gideon israel dsouzagideon israel dsouza50.47%13.03%


vivek goyalvivek goyal40.37%13.03%


dave youngdave young30.28%13.03%


david howellsdavid howells20.19%13.03%


jingoo hanjingoo han10.09%13.03%


thadeu lima de souza cascardothadeu lima de souza cascardo10.09%13.03%


Total1067100.00%33100.00%

  
Directory: kernel



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