Contributors: 39
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Kay Sievers |
406 |
31.23% |
4 |
6.67% |
| Roland McGrath |
145 |
11.15% |
1 |
1.67% |
| Jeff Moyer |
119 |
9.15% |
1 |
1.67% |
| Dave Hansen |
98 |
7.54% |
1 |
1.67% |
| Américo Wang |
84 |
6.46% |
1 |
1.67% |
| Thomas Weißschuh |
81 |
6.23% |
3 |
5.00% |
| Greg Kroah-Hartman |
61 |
4.69% |
6 |
10.00% |
| Ken'ichi Ohmichi |
51 |
3.92% |
2 |
3.33% |
| Paul E. McKenney |
40 |
3.08% |
3 |
5.00% |
| Antti P. Miettinen |
28 |
2.15% |
1 |
1.67% |
| Eric DeVolder |
25 |
1.92% |
2 |
3.33% |
| Valentin Schneider |
17 |
1.31% |
1 |
1.67% |
| Tetsuo Handa |
16 |
1.23% |
1 |
1.67% |
| Ludwig Nussel |
16 |
1.23% |
1 |
1.67% |
| Baoquan He |
14 |
1.08% |
2 |
3.33% |
| Patrick Mochel |
11 |
0.85% |
3 |
5.00% |
| Russell King |
11 |
0.85% |
1 |
1.67% |
| Hari Bathini |
11 |
0.85% |
1 |
1.67% |
| Michael Marineau |
10 |
0.77% |
1 |
1.67% |
| Paul Gortmaker |
7 |
0.54% |
3 |
5.00% |
| John Levon |
6 |
0.46% |
1 |
1.67% |
| Chris Wright |
5 |
0.38% |
1 |
1.67% |
| Eric Dumazet |
5 |
0.38% |
1 |
1.67% |
| Nadia Yvette Chambers |
4 |
0.31% |
2 |
3.33% |
| Dhaval Giani |
4 |
0.31% |
1 |
1.67% |
| Gideon Israel Dsouza |
3 |
0.23% |
1 |
1.67% |
| Eric W. Biedermann |
3 |
0.23% |
1 |
1.67% |
| Linus Torvalds (pre-git) |
3 |
0.23% |
2 |
3.33% |
| Thomas Gleixner |
2 |
0.15% |
1 |
1.67% |
| David Howells |
2 |
0.15% |
1 |
1.67% |
| Dave Young |
2 |
0.15% |
1 |
1.67% |
| Petr Tesarik |
2 |
0.15% |
1 |
1.67% |
| Andrew Morton |
2 |
0.15% |
1 |
1.67% |
| Xunlei Pang |
1 |
0.08% |
1 |
1.67% |
| Jingoo Han |
1 |
0.08% |
1 |
1.67% |
| Arvind Yadav |
1 |
0.08% |
1 |
1.67% |
| Miaohe Lin |
1 |
0.08% |
1 |
1.67% |
| Thadeu Lima de Souza Cascardo |
1 |
0.08% |
1 |
1.67% |
| Bhumika Goyal |
1 |
0.08% |
1 |
1.67% |
| Total |
1300 |
|
60 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* 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>
*/
#include <asm/byteorder.h>
#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 */
#if defined(__LITTLE_ENDIAN)
#define CPU_BYTEORDER_STRING "little"
#elif defined(__BIG_ENDIAN)
#define CPU_BYTEORDER_STRING "big"
#else
#error Unknown byteorder
#endif
#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_RW(_name)
/* current uevent sequence number */
static ssize_t uevent_seqnum_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%llu\n", (u64)atomic64_read(&uevent_seqnum));
}
KERNEL_ATTR_RO(uevent_seqnum);
/* cpu byteorder */
static ssize_t cpu_byteorder_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%s\n", CPU_BYTEORDER_STRING);
}
KERNEL_ATTR_RO(cpu_byteorder);
/* address bits */
static ssize_t address_bits_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%zu\n", sizeof(void *) * 8 /* CHAR_BIT */);
}
KERNEL_ATTR_RO(address_bits);
#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 sysfs_emit(buf, "%s\n", uevent_helper);
}
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;
}
KERNEL_ATTR_RW(uevent_helper);
#endif
#ifdef CONFIG_PROFILING
static ssize_t profiling_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%d\n", prof_on);
}
static ssize_t profiling_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
int ret;
static DEFINE_MUTEX(lock);
/*
* We need serialization, for profile_setup() initializes prof_on
* value and profile_init() must not reallocate prof_buffer after
* once allocated.
*/
guard(mutex)(&lock);
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;
}
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 sysfs_emit(buf, "%d\n", !!kexec_image);
}
KERNEL_ATTR_RO(kexec_loaded);
#ifdef CONFIG_CRASH_DUMP
static ssize_t kexec_crash_loaded_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%d\n", kexec_crash_loaded());
}
KERNEL_ATTR_RO(kexec_crash_loaded);
static ssize_t kexec_crash_size_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
ssize_t size = crash_get_memory_size();
if (size < 0)
return size;
return sysfs_emit(buf, "%zd\n", size);
}
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;
}
KERNEL_ATTR_RW(kexec_crash_size);
#endif /* CONFIG_CRASH_DUMP*/
#endif /* CONFIG_KEXEC_CORE */
#ifdef CONFIG_VMCORE_INFO
static ssize_t vmcoreinfo_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
phys_addr_t vmcore_base = paddr_vmcoreinfo_note();
return sysfs_emit(buf, "%pa %x\n", &vmcore_base,
(unsigned int)VMCOREINFO_NOTE_SIZE);
}
KERNEL_ATTR_RO(vmcoreinfo);
#ifdef CONFIG_CRASH_HOTPLUG
static ssize_t crash_elfcorehdr_size_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
unsigned int sz = crash_get_elfcorehdr_size();
return sysfs_emit(buf, "%u\n", sz);
}
KERNEL_ATTR_RO(crash_elfcorehdr_size);
#endif
#endif /* CONFIG_VMCORE_INFO */
/* whether file capabilities are enabled */
static ssize_t fscaps_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%d\n", file_caps_enabled);
}
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 sysfs_emit(buf, "%d\n", READ_ONCE(rcu_expedited));
}
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;
}
KERNEL_ATTR_RW(rcu_expedited);
int rcu_normal;
static ssize_t rcu_normal_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%d\n", READ_ONCE(rcu_normal));
}
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;
}
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;
extern const void __stop_notes;
#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;
}
static struct bin_attribute notes_attr __ro_after_init = {
.attr = {
.name = "notes",
.mode = S_IRUGO,
},
.read = ¬es_read,
};
struct kobject *kernel_kobj;
EXPORT_SYMBOL_GPL(kernel_kobj);
static struct attribute * kernel_attrs[] = {
&fscaps_attr.attr,
&uevent_seqnum_attr.attr,
&cpu_byteorder_attr.attr,
&address_bits_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,
#ifdef CONFIG_CRASH_DUMP
&kexec_crash_loaded_attr.attr,
&kexec_crash_size_attr.attr,
#endif
#endif
#ifdef CONFIG_VMCORE_INFO
&vmcoreinfo_attr.attr,
#ifdef CONFIG_CRASH_HOTPLUG
&crash_elfcorehdr_size_attr.attr,
#endif
#endif
#ifndef CONFIG_TINY_RCU
&rcu_expedited_attr.attr,
&rcu_normal_attr.attr,
#endif
NULL
};
static const 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, ¬es_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;
}
core_initcall(ksysfs_init);