[deliverable/linux.git] / fs / proc / proc_misc.c

/*
 *  linux/fs/proc/proc_misc.c
 *
 *  linux/fs/proc/array.c
 *  Copyright (C) 1992  by Linus Torvalds
 *  based on ideas by Darren Senn
 *
 *  This used to be the part of array.c. See the rest of history and credits
 *  there. I took this into a separate file and switched the thing to generic
 *  proc_file_inode_operations, leaving in array.c only per-process stuff.
 *  Inumbers allocation made dynamic (via create_proc_entry()).  AV, May 1999.
 *
 * Changes:
 * Fulton Green      :  Encapsulated position metric calculations.
 *			<kernel@FultonGreen.com>
 */

#include <linux/types.h>
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/kernel.h>
#include <linux/kernel_stat.h>
#include <linux/tty.h>
#include <linux/string.h>
#include <linux/mman.h>
#include <linux/proc_fs.h>
#include <linux/ioport.h>
#include <linux/config.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/signal.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/seq_file.h>
#include <linux/times.h>
#include <linux/profile.h>
#include <linux/blkdev.h>
#include <linux/hugetlb.h>
#include <linux/jiffies.h>
#include <linux/sysrq.h>
#include <linux/vmalloc.h>
#include <linux/crash_dump.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/tlb.h>
#include <asm/div64.h>
#include "internal.h"

#define LOAD_INT(x) ((x) >> FSHIFT)
#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
/*
 * Warning: stuff below (imported functions) assumes that its output will fit
 * into one page. For some of those functions it may be wrong. Moreover, we
 * have a way to deal with that gracefully. Right now I used straightforward
 * wrappers, but this needs further analysis wrt potential overflows.
 */
extern int get_hardware_list(char *);
extern int get_stram_list(char *);
extern int get_chrdev_list(char *);
extern int get_filesystem_list(char *);
extern int get_exec_domain_list(char *);
extern int get_dma_list(char *);
extern int get_locks_status (char *, char **, off_t, int);

static int proc_calc_metrics(char *page, char **start, off_t off,
				 int count, int *eof, int len)
{
	if (len <= off+count) *eof = 1;
	*start = page + off;
	len -= off;
	if (len>count) len = count;
	if (len<0) len = 0;
	return len;
}

static int loadavg_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	int a, b, c;
	int len;

	a = avenrun[0] + (FIXED_1/200);
	b = avenrun[1] + (FIXED_1/200);
	c = avenrun[2] + (FIXED_1/200);
	len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
		LOAD_INT(a), LOAD_FRAC(a),
		LOAD_INT(b), LOAD_FRAC(b),
		LOAD_INT(c), LOAD_FRAC(c),
		nr_running(), nr_threads, last_pid);
	return proc_calc_metrics(page, start, off, count, eof, len);
}

static int uptime_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	struct timespec uptime;
	struct timespec idle;
	int len;
	cputime_t idletime = cputime_add(init_task.utime, init_task.stime);

	do_posix_clock_monotonic_gettime(&uptime);
	cputime_to_timespec(idletime, &idle);
	len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
			(unsigned long) uptime.tv_sec,
			(uptime.tv_nsec / (NSEC_PER_SEC / 100)),
			(unsigned long) idle.tv_sec,
			(idle.tv_nsec / (NSEC_PER_SEC / 100)));

	return proc_calc_metrics(page, start, off, count, eof, len);
}

static int meminfo_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	struct sysinfo i;
	int len;
	struct page_state ps;
	unsigned long inactive;
	unsigned long active;
	unsigned long free;
	unsigned long committed;
	unsigned long allowed;
	struct vmalloc_info vmi;
	long cached;

	get_page_state(&ps);
	get_zone_counts(&active, &inactive, &free);

/*
 * display in kilobytes.
 */
#define K(x) ((x) << (PAGE_SHIFT - 10))
	si_meminfo(&i);
	si_swapinfo(&i);
	committed = atomic_read(&vm_committed_space);
	allowed = ((totalram_pages - hugetlb_total_pages())
		* sysctl_overcommit_ratio / 100) + total_swap_pages;

	cached = get_page_cache_size() - total_swapcache_pages - i.bufferram;
	if (cached < 0)
		cached = 0;

	get_vmalloc_info(&vmi);

	/*
	 * Tagged format, for easy grepping and expansion.
	 */
	len = sprintf(page,
		"MemTotal:     %8lu kB\n"
		"MemFree:      %8lu kB\n"
		"Buffers:      %8lu kB\n"
		"Cached:       %8lu kB\n"
		"SwapCached:   %8lu kB\n"
		"Active:       %8lu kB\n"
		"Inactive:     %8lu kB\n"
		"HighTotal:    %8lu kB\n"
		"HighFree:     %8lu kB\n"
		"LowTotal:     %8lu kB\n"
		"LowFree:      %8lu kB\n"
		"SwapTotal:    %8lu kB\n"
		"SwapFree:     %8lu kB\n"
		"Dirty:        %8lu kB\n"
		"Writeback:    %8lu kB\n"
		"Mapped:       %8lu kB\n"
		"Slab:         %8lu kB\n"
		"CommitLimit:  %8lu kB\n"
		"Committed_AS: %8lu kB\n"
		"PageTables:   %8lu kB\n"
		"VmallocTotal: %8lu kB\n"
		"VmallocUsed:  %8lu kB\n"
		"VmallocChunk: %8lu kB\n",
		K(i.totalram),
		K(i.freeram),
		K(i.bufferram),
		K(cached),
		K(total_swapcache_pages),
		K(active),
		K(inactive),
		K(i.totalhigh),
		K(i.freehigh),
		K(i.totalram-i.totalhigh),
		K(i.freeram-i.freehigh),
		K(i.totalswap),
		K(i.freeswap),
		K(ps.nr_dirty),
		K(ps.nr_writeback),
		K(ps.nr_mapped),
		K(ps.nr_slab),
		K(allowed),
		K(committed),
		K(ps.nr_page_table_pages),
		(unsigned long)VMALLOC_TOTAL >> 10,
		vmi.used >> 10,
		vmi.largest_chunk >> 10
		);

		len += hugetlb_report_meminfo(page + len);

	return proc_calc_metrics(page, start, off, count, eof, len);
#undef K
}

extern struct seq_operations fragmentation_op;
static int fragmentation_open(struct inode *inode, struct file *file)
{
	(void)inode;
	return seq_open(file, &fragmentation_op);
}

static struct file_operations fragmentation_file_operations = {
	.open		= fragmentation_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

extern struct seq_operations zoneinfo_op;
static int zoneinfo_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &zoneinfo_op);
}

static struct file_operations proc_zoneinfo_file_operations = {
	.open		= zoneinfo_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static int version_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	int len;

	strcpy(page, linux_banner);
	len = strlen(page);
	return proc_calc_metrics(page, start, off, count, eof, len);
}

extern struct seq_operations cpuinfo_op;
static int cpuinfo_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &cpuinfo_op);
}
static struct file_operations proc_cpuinfo_operations = {
	.open		= cpuinfo_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

extern struct seq_operations vmstat_op;
static int vmstat_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &vmstat_op);
}
static struct file_operations proc_vmstat_file_operations = {
	.open		= vmstat_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

#ifdef CONFIG_PROC_HARDWARE
static int hardware_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	int len = get_hardware_list(page);
	return proc_calc_metrics(page, start, off, count, eof, len);
}
#endif

#ifdef CONFIG_STRAM_PROC
static int stram_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	int len = get_stram_list(page);
	return proc_calc_metrics(page, start, off, count, eof, len);
}
#endif

extern struct seq_operations partitions_op;
static int partitions_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &partitions_op);
}
static struct file_operations proc_partitions_operations = {
	.open		= partitions_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

extern struct seq_operations diskstats_op;
static int diskstats_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &diskstats_op);
}
static struct file_operations proc_diskstats_operations = {
	.open		= diskstats_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

#ifdef CONFIG_MODULES
extern struct seq_operations modules_op;
static int modules_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &modules_op);
}
static struct file_operations proc_modules_operations = {
	.open		= modules_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};
#endif

extern struct seq_operations slabinfo_op;
extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
static int slabinfo_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &slabinfo_op);
}
static struct file_operations proc_slabinfo_operations = {
	.open		= slabinfo_open,
	.read		= seq_read,
	.write		= slabinfo_write,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static int show_stat(struct seq_file *p, void *v)
{
	int i;
	unsigned long jif;
	cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
	u64 sum = 0;

	user = nice = system = idle = iowait =
		irq = softirq = steal = cputime64_zero;
	jif = - wall_to_monotonic.tv_sec;
	if (wall_to_monotonic.tv_nsec)
		--jif;

	for_each_cpu(i) {
		int j;

		user = cputime64_add(user, kstat_cpu(i).cpustat.user);
		nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
		system = cputime64_add(system, kstat_cpu(i).cpustat.system);
		idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
		iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
		irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
		softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
		steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
		for (j = 0 ; j < NR_IRQS ; j++)
			sum += kstat_cpu(i).irqs[j];
	}

	seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu\n",
		(unsigned long long)cputime64_to_clock_t(user),
		(unsigned long long)cputime64_to_clock_t(nice),
		(unsigned long long)cputime64_to_clock_t(system),
		(unsigned long long)cputime64_to_clock_t(idle),
		(unsigned long long)cputime64_to_clock_t(iowait),
		(unsigned long long)cputime64_to_clock_t(irq),
		(unsigned long long)cputime64_to_clock_t(softirq),
		(unsigned long long)cputime64_to_clock_t(steal));
	for_each_online_cpu(i) {

		/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
		user = kstat_cpu(i).cpustat.user;
		nice = kstat_cpu(i).cpustat.nice;
		system = kstat_cpu(i).cpustat.system;
		idle = kstat_cpu(i).cpustat.idle;
		iowait = kstat_cpu(i).cpustat.iowait;
		irq = kstat_cpu(i).cpustat.irq;
		softirq = kstat_cpu(i).cpustat.softirq;
		steal = kstat_cpu(i).cpustat.steal;
		seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
			i,
			(unsigned long long)cputime64_to_clock_t(user),
			(unsigned long long)cputime64_to_clock_t(nice),
			(unsigned long long)cputime64_to_clock_t(system),
			(unsigned long long)cputime64_to_clock_t(idle),
			(unsigned long long)cputime64_to_clock_t(iowait),
			(unsigned long long)cputime64_to_clock_t(irq),
			(unsigned long long)cputime64_to_clock_t(softirq),
			(unsigned long long)cputime64_to_clock_t(steal));
	}
	seq_printf(p, "intr %llu", (unsigned long long)sum);

#if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
	for (i = 0; i < NR_IRQS; i++)
		seq_printf(p, " %u", kstat_irqs(i));
#endif

	seq_printf(p,
		"\nctxt %llu\n"
		"btime %lu\n"
		"processes %lu\n"
		"procs_running %lu\n"
		"procs_blocked %lu\n",
		nr_context_switches(),
		(unsigned long)jif,
		total_forks,
		nr_running(),
		nr_iowait());

	return 0;
}

static int stat_open(struct inode *inode, struct file *file)
{
	unsigned size = 4096 * (1 + num_possible_cpus() / 32);
	char *buf;
	struct seq_file *m;
	int res;

	/* don't ask for more than the kmalloc() max size, currently 128 KB */
	if (size > 128 * 1024)
		size = 128 * 1024;
	buf = kmalloc(size, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	res = single_open(file, show_stat, NULL);
	if (!res) {
		m = file->private_data;
		m->buf = buf;
		m->size = size;
	} else
		kfree(buf);
	return res;
}
static struct file_operations proc_stat_operations = {
	.open		= stat_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

static int devices_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	int len = get_chrdev_list(page);
	len += get_blkdev_list(page+len, len);
	return proc_calc_metrics(page, start, off, count, eof, len);
}

/*
 * /proc/interrupts
 */
static void *int_seq_start(struct seq_file *f, loff_t *pos)
{
	return (*pos <= NR_IRQS) ? pos : NULL;
}

static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
{
	(*pos)++;
	if (*pos > NR_IRQS)
		return NULL;
	return pos;
}

static void int_seq_stop(struct seq_file *f, void *v)
{
	/* Nothing to do */
}


extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
static struct seq_operations int_seq_ops = {
	.start = int_seq_start,
	.next  = int_seq_next,
	.stop  = int_seq_stop,
	.show  = show_interrupts
};

static int interrupts_open(struct inode *inode, struct file *filp)
{
	return seq_open(filp, &int_seq_ops);
}

static struct file_operations proc_interrupts_operations = {
	.open		= interrupts_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static int filesystems_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	int len = get_filesystem_list(page);
	return proc_calc_metrics(page, start, off, count, eof, len);
}

static int cmdline_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	int len;

	len = sprintf(page, "%s\n", saved_command_line);
	return proc_calc_metrics(page, start, off, count, eof, len);
}

static int locks_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	int len = get_locks_status(page, start, off, count);

	if (len < count)
		*eof = 1;
	return len;
}

static int execdomains_read_proc(char *page, char **start, off_t off,
				 int count, int *eof, void *data)
{
	int len = get_exec_domain_list(page);
	return proc_calc_metrics(page, start, off, count, eof, len);
}

#ifdef CONFIG_MAGIC_SYSRQ
/*
 * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 */
static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
				   size_t count, loff_t *ppos)
{
	if (count) {
		char c;

		if (get_user(c, buf))
			return -EFAULT;
		__handle_sysrq(c, NULL, NULL, 0);
	}
	return count;
}

static struct file_operations proc_sysrq_trigger_operations = {
	.write		= write_sysrq_trigger,
};
#endif

struct proc_dir_entry *proc_root_kcore;

void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
{
	struct proc_dir_entry *entry;
	entry = create_proc_entry(name, mode, NULL);
	if (entry)
		entry->proc_fops = f;
}

void __init proc_misc_init(void)
{
	struct proc_dir_entry *entry;
	static struct {
		char *name;
		int (*read_proc)(char*,char**,off_t,int,int*,void*);
	} *p, simple_ones[] = {
		{"loadavg",     loadavg_read_proc},
		{"uptime",	uptime_read_proc},
		{"meminfo",	meminfo_read_proc},
		{"version",	version_read_proc},
#ifdef CONFIG_PROC_HARDWARE
		{"hardware",	hardware_read_proc},
#endif
#ifdef CONFIG_STRAM_PROC
		{"stram",	stram_read_proc},
#endif
		{"devices",	devices_read_proc},
		{"filesystems",	filesystems_read_proc},
		{"cmdline",	cmdline_read_proc},
		{"locks",	locks_read_proc},
		{"execdomains",	execdomains_read_proc},
		{NULL,}
	};
	for (p = simple_ones; p->name; p++)
		create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);

	proc_symlink("mounts", NULL, "self/mounts");

	/* And now for trickier ones */
	entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
	if (entry)
		entry->proc_fops = &proc_kmsg_operations;
	create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
	create_seq_entry("partitions", 0, &proc_partitions_operations);
	create_seq_entry("stat", 0, &proc_stat_operations);
	create_seq_entry("interrupts", 0, &proc_interrupts_operations);
	create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
	create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
	create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
	create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
	create_seq_entry("diskstats", 0, &proc_diskstats_operations);
#ifdef CONFIG_MODULES
	create_seq_entry("modules", 0, &proc_modules_operations);
#endif
#ifdef CONFIG_SCHEDSTATS
	create_seq_entry("schedstat", 0, &proc_schedstat_operations);
#endif
#ifdef CONFIG_PROC_KCORE
	proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
	if (proc_root_kcore) {
		proc_root_kcore->proc_fops = &proc_kcore_operations;
		proc_root_kcore->size =
				(size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
	}
#endif
#ifdef CONFIG_PROC_VMCORE
	proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
	if (proc_vmcore)
		proc_vmcore->proc_fops = &proc_vmcore_operations;
#endif
#ifdef CONFIG_MAGIC_SYSRQ
	entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
	if (entry)
		entry->proc_fops = &proc_sysrq_trigger_operations;
#endif
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/proc/proc_misc.c
	3	*
	4	* linux/fs/proc/array.c
	5	* Copyright (C) 1992 by Linus Torvalds
	6	* based on ideas by Darren Senn
	7	*
	8	* This used to be the part of array.c. See the rest of history and credits
	9	* there. I took this into a separate file and switched the thing to generic
	10	* proc_file_inode_operations, leaving in array.c only per-process stuff.
	11	* Inumbers allocation made dynamic (via create_proc_entry()). AV, May 1999.
	12	*
	13	* Changes:
	14	* Fulton Green : Encapsulated position metric calculations.
	15	* <kernel@FultonGreen.com>
	16	*/
	17
	18	#include <linux/types.h>
	19	#include <linux/errno.h>
	20	#include <linux/time.h>
	21	#include <linux/kernel.h>
	22	#include <linux/kernel_stat.h>
	23	#include <linux/tty.h>
	24	#include <linux/string.h>
	25	#include <linux/mman.h>
	26	#include <linux/proc_fs.h>
	27	#include <linux/ioport.h>
	28	#include <linux/config.h>
	29	#include <linux/mm.h>
	30	#include <linux/mmzone.h>
	31	#include <linux/pagemap.h>
	32	#include <linux/swap.h>
	33	#include <linux/slab.h>
	34	#include <linux/smp.h>
	35	#include <linux/signal.h>
	36	#include <linux/module.h>
	37	#include <linux/init.h>
	38	#include <linux/smp_lock.h>
	39	#include <linux/seq_file.h>
	40	#include <linux/times.h>
	41	#include <linux/profile.h>
	42	#include <linux/blkdev.h>
	43	#include <linux/hugetlb.h>
	44	#include <linux/jiffies.h>
	45	#include <linux/sysrq.h>
	46	#include <linux/vmalloc.h>
666bfddb	47	#include <linux/crash_dump.h>
1da177e4 LT	48	#include <asm/uaccess.h>
	49	#include <asm/pgtable.h>
	50	#include <asm/io.h>
	51	#include <asm/tlb.h>
	52	#include <asm/div64.h>
	53	#include "internal.h"
	54
	55	#define LOAD_INT(x) ((x) >> FSHIFT)
	56	#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
	57	/*
	58	* Warning: stuff below (imported functions) assumes that its output will fit
	59	* into one page. For some of those functions it may be wrong. Moreover, we
	60	* have a way to deal with that gracefully. Right now I used straightforward
	61	* wrappers, but this needs further analysis wrt potential overflows.
	62	*/
	63	extern int get_hardware_list(char *);
	64	extern int get_stram_list(char *);
	65	extern int get_chrdev_list(char *);
	66	extern int get_filesystem_list(char *);
	67	extern int get_exec_domain_list(char *);
	68	extern int get_dma_list(char *);
	69	extern int get_locks_status (char , char *, off_t, int);
	70
	71	static int proc_calc_metrics(char page, char *start, off_t off,
	72	int count, int *eof, int len)
	73	{
	74	if (len <= off+count) *eof = 1;
	75	*start = page + off;
	76	len -= off;
	77	if (len>count) len = count;
	78	if (len<0) len = 0;
	79	return len;
	80	}
	81
	82	static int loadavg_read_proc(char page, char *start, off_t off,
	83	int count, int eof, void data)
	84	{
	85	int a, b, c;
	86	int len;
	87
	88	a = avenrun[0] + (FIXED_1/200);
	89	b = avenrun[1] + (FIXED_1/200);
	90	c = avenrun[2] + (FIXED_1/200);
	91	len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
	92	LOAD_INT(a), LOAD_FRAC(a),
	93	LOAD_INT(b), LOAD_FRAC(b),
	94	LOAD_INT(c), LOAD_FRAC(c),
	95	nr_running(), nr_threads, last_pid);
	96	return proc_calc_metrics(page, start, off, count, eof, len);
	97	}
	98
	99	static int uptime_read_proc(char page, char *start, off_t off,
	100	int count, int eof, void data)
	101	{
	102	struct timespec uptime;
	103	struct timespec idle;
	104	int len;
	105	cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
	106
	107	do_posix_clock_monotonic_gettime(&uptime);
	108	cputime_to_timespec(idletime, &idle);
	109	len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
	110	(unsigned long) uptime.tv_sec,
	111	(uptime.tv_nsec / (NSEC_PER_SEC / 100)),
112	(unsigned long) idle.tv_sec,
113	(idle.tv_nsec / (NSEC_PER_SEC / 100)));
114
115	return proc_calc_metrics(page, start, off, count, eof, len);
116	}
117
118	static int meminfo_read_proc(char page, char *start, off_t off,
119	int count, int eof, void data)
120	{
121	struct sysinfo i;
122	int len;
123	struct page_state ps;
124	unsigned long inactive;
125	unsigned long active;
126	unsigned long free;
127	unsigned long committed;
128	unsigned long allowed;
129	struct vmalloc_info vmi;
4c4c402d	130	long cached;
1da177e4 LT	131
	132	get_page_state(&ps);
	133	get_zone_counts(&active, &inactive, &free);
	134
	135	/*
	136	* display in kilobytes.
	137	*/
	138	#define K(x) ((x) << (PAGE_SHIFT - 10))
	139	si_meminfo(&i);
	140	si_swapinfo(&i);
	141	committed = atomic_read(&vm_committed_space);
	142	allowed = ((totalram_pages - hugetlb_total_pages())
	143	* sysctl_overcommit_ratio / 100) + total_swap_pages;
	144
4c4c402d MH	145	cached = get_page_cache_size() - total_swapcache_pages - i.bufferram;
	146	if (cached < 0)
	147	cached = 0;
	148
1da177e4 LT	149	get_vmalloc_info(&vmi);
	150
	151	/*
	152	* Tagged format, for easy grepping and expansion.
	153	*/
	154	len = sprintf(page,
	155	"MemTotal: %8lu kB\n"
	156	"MemFree: %8lu kB\n"
	157	"Buffers: %8lu kB\n"
	158	"Cached: %8lu kB\n"
	159	"SwapCached: %8lu kB\n"
	160	"Active: %8lu kB\n"
	161	"Inactive: %8lu kB\n"
	162	"HighTotal: %8lu kB\n"
	163	"HighFree: %8lu kB\n"
	164	"LowTotal: %8lu kB\n"
	165	"LowFree: %8lu kB\n"
	166	"SwapTotal: %8lu kB\n"
	167	"SwapFree: %8lu kB\n"
	168	"Dirty: %8lu kB\n"
	169	"Writeback: %8lu kB\n"
	170	"Mapped: %8lu kB\n"
	171	"Slab: %8lu kB\n"
	172	"CommitLimit: %8lu kB\n"
	173	"Committed_AS: %8lu kB\n"
	174	"PageTables: %8lu kB\n"
	175	"VmallocTotal: %8lu kB\n"
	176	"VmallocUsed: %8lu kB\n"
	177	"VmallocChunk: %8lu kB\n",
	178	K(i.totalram),
	179	K(i.freeram),
	180	K(i.bufferram),
4c4c402d	181	K(cached),
1da177e4 LT	182	K(total_swapcache_pages),
	183	K(active),
	184	K(inactive),
	185	K(i.totalhigh),
	186	K(i.freehigh),
	187	K(i.totalram-i.totalhigh),
	188	K(i.freeram-i.freehigh),
	189	K(i.totalswap),
	190	K(i.freeswap),
	191	K(ps.nr_dirty),
	192	K(ps.nr_writeback),
	193	K(ps.nr_mapped),
	194	K(ps.nr_slab),
	195	K(allowed),
	196	K(committed),
	197	K(ps.nr_page_table_pages),
	198	(unsigned long)VMALLOC_TOTAL >> 10,
	199	vmi.used >> 10,
	200	vmi.largest_chunk >> 10
	201	);
	202
	203	len += hugetlb_report_meminfo(page + len);
	204
	205	return proc_calc_metrics(page, start, off, count, eof, len);
	206	#undef K
	207	}
	208
	209	extern struct seq_operations fragmentation_op;
	210	static int fragmentation_open(struct inode inode, struct file file)
	211	{
	212	(void)inode;
	213	return seq_open(file, &fragmentation_op);
	214	}
	215
	216	static struct file_operations fragmentation_file_operations = {
	217	.open = fragmentation_open,
	218	.read = seq_read,
	219	.llseek = seq_lseek,
	220	.release = seq_release,
	221	};
	222
295ab934 ND	223	extern struct seq_operations zoneinfo_op;
	224	static int zoneinfo_open(struct inode inode, struct file file)
	225	{
	226	return seq_open(file, &zoneinfo_op);
	227	}
	228
	229	static struct file_operations proc_zoneinfo_file_operations = {
	230	.open = zoneinfo_open,
	231	.read = seq_read,
	232	.llseek = seq_lseek,
	233	.release = seq_release,
	234	};
	235
1da177e4 LT	236	static int version_read_proc(char page, char *start, off_t off,
	237	int count, int eof, void data)
	238	{
	239	int len;
	240
	241	strcpy(page, linux_banner);
	242	len = strlen(page);
	243	return proc_calc_metrics(page, start, off, count, eof, len);
	244	}
	245
	246	extern struct seq_operations cpuinfo_op;
	247	static int cpuinfo_open(struct inode inode, struct file file)
	248	{
	249	return seq_open(file, &cpuinfo_op);
	250	}
	251	static struct file_operations proc_cpuinfo_operations = {
	252	.open = cpuinfo_open,
	253	.read = seq_read,
	254	.llseek = seq_lseek,
	255	.release = seq_release,
	256	};
	257
	258	extern struct seq_operations vmstat_op;
	259	static int vmstat_open(struct inode inode, struct file file)
	260	{
	261	return seq_open(file, &vmstat_op);
	262	}
	263	static struct file_operations proc_vmstat_file_operations = {
	264	.open = vmstat_open,
	265	.read = seq_read,
	266	.llseek = seq_lseek,
	267	.release = seq_release,
	268	};
	269
	270	#ifdef CONFIG_PROC_HARDWARE
	271	static int hardware_read_proc(char page, char *start, off_t off,
	272	int count, int eof, void data)
	273	{
	274	int len = get_hardware_list(page);
	275	return proc_calc_metrics(page, start, off, count, eof, len);
	276	}
	277	#endif
	278
	279	#ifdef CONFIG_STRAM_PROC
	280	static int stram_read_proc(char page, char *start, off_t off,
	281	int count, int eof, void data)
	282	{
	283	int len = get_stram_list(page);
	284	return proc_calc_metrics(page, start, off, count, eof, len);
	285	}
	286	#endif
	287
	288	extern struct seq_operations partitions_op;
	289	static int partitions_open(struct inode inode, struct file file)
	290	{
	291	return seq_open(file, &partitions_op);
	292	}
	293	static struct file_operations proc_partitions_operations = {
	294	.open = partitions_open,
	295	.read = seq_read,
	296	.llseek = seq_lseek,
	297	.release = seq_release,
	298	};
	299
300	extern struct seq_operations diskstats_op;
301	static int diskstats_open(struct inode inode, struct file file)
302	{
303	return seq_open(file, &diskstats_op);
304	}
305	static struct file_operations proc_diskstats_operations = {
306	.open = diskstats_open,
307	.read = seq_read,
308	.llseek = seq_lseek,
309	.release = seq_release,
310	};
311
312	#ifdef CONFIG_MODULES
313	extern struct seq_operations modules_op;
314	static int modules_open(struct inode inode, struct file file)
315	{
316	return seq_open(file, &modules_op);
317	}
318	static struct file_operations proc_modules_operations = {
319	.open = modules_open,
320	.read = seq_read,
321	.llseek = seq_lseek,
322	.release = seq_release,
323	};
324	#endif
325
326	extern struct seq_operations slabinfo_op;
327	extern ssize_t slabinfo_write(struct file , const char __user , size_t, loff_t *);
328	static int slabinfo_open(struct inode inode, struct file file)
329	{
330	return seq_open(file, &slabinfo_op);
331	}
332	static struct file_operations proc_slabinfo_operations = {
333	.open = slabinfo_open,
334	.read = seq_read,
335	.write = slabinfo_write,
336	.llseek = seq_lseek,
337	.release = seq_release,
338	};
339
340	static int show_stat(struct seq_file p, void v)
341	{
342	int i;
343	unsigned long jif;
344	cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
345	u64 sum = 0;
346
347	user = nice = system = idle = iowait =
348	irq = softirq = steal = cputime64_zero;
349	jif = - wall_to_monotonic.tv_sec;
350	if (wall_to_monotonic.tv_nsec)
351	--jif;
352
353	for_each_cpu(i) {
354	int j;
355
356	user = cputime64_add(user, kstat_cpu(i).cpustat.user);
357	nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
358	system = cputime64_add(system, kstat_cpu(i).cpustat.system);
359	idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
360	iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
361	irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
362	softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
363	steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
364	for (j = 0 ; j < NR_IRQS ; j++)
365	sum += kstat_cpu(i).irqs[j];
366	}
367
368	seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu\n",
369	(unsigned long long)cputime64_to_clock_t(user),
370	(unsigned long long)cputime64_to_clock_t(nice),
371	(unsigned long long)cputime64_to_clock_t(system),
372	(unsigned long long)cputime64_to_clock_t(idle),
373	(unsigned long long)cputime64_to_clock_t(iowait),
374	(unsigned long long)cputime64_to_clock_t(irq),
375	(unsigned long long)cputime64_to_clock_t(softirq),
376	(unsigned long long)cputime64_to_clock_t(steal));
377	for_each_online_cpu(i) {
378
379	/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
380	user = kstat_cpu(i).cpustat.user;
381	nice = kstat_cpu(i).cpustat.nice;
382	system = kstat_cpu(i).cpustat.system;
383	idle = kstat_cpu(i).cpustat.idle;
384	iowait = kstat_cpu(i).cpustat.iowait;
385	irq = kstat_cpu(i).cpustat.irq;
386	softirq = kstat_cpu(i).cpustat.softirq;
387	steal = kstat_cpu(i).cpustat.steal;
388	seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
389	i,
390	(unsigned long long)cputime64_to_clock_t(user),
391	(unsigned long long)cputime64_to_clock_t(nice),
392	(unsigned long long)cputime64_to_clock_t(system),
393	(unsigned long long)cputime64_to_clock_t(idle),
394	(unsigned long long)cputime64_to_clock_t(iowait),
395	(unsigned long long)cputime64_to_clock_t(irq),
396	(unsigned long long)cputime64_to_clock_t(softirq),
397	(unsigned long long)cputime64_to_clock_t(steal));
398	}
399	seq_printf(p, "intr %llu", (unsigned long long)sum);
400
401	#if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
402	for (i = 0; i < NR_IRQS; i++)
403	seq_printf(p, " %u", kstat_irqs(i));
404	#endif
405
406	seq_printf(p,
407	"\nctxt %llu\n"
408	"btime %lu\n"
409	"processes %lu\n"
410	"procs_running %lu\n"
411	"procs_blocked %lu\n",
412	nr_context_switches(),
413	(unsigned long)jif,
414	total_forks,
415	nr_running(),
416	nr_iowait());
417
418	return 0;
419	}
420
421	static int stat_open(struct inode inode, struct file file)
422	{
423	unsigned size = 4096 * (1 + num_possible_cpus() / 32);
424	char *buf;
425	struct seq_file *m;
426	int res;
427
428	/* don't ask for more than the kmalloc() max size, currently 128 KB */
429	if (size > 128 * 1024)
430	size = 128 * 1024;
431	buf = kmalloc(size, GFP_KERNEL);
432	if (!buf)
433	return -ENOMEM;
434
435	res = single_open(file, show_stat, NULL);
436	if (!res) {
437	m = file->private_data;
438	m->buf = buf;
439	m->size = size;
440	} else
441	kfree(buf);
442	return res;
443	}
444	static struct file_operations proc_stat_operations = {
445	.open = stat_open,
446	.read = seq_read,
447	.llseek = seq_lseek,
448	.release = single_release,
449	};
450
451	static int devices_read_proc(char page, char *start, off_t off,
452	int count, int eof, void data)
453	{
454	int len = get_chrdev_list(page);
ac20427e	455	len += get_blkdev_list(page+len, len);
1da177e4 LT	456	return proc_calc_metrics(page, start, off, count, eof, len);
	457	}
	458
	459	/*
	460	* /proc/interrupts
	461	*/
	462	static void int_seq_start(struct seq_file f, loff_t *pos)
	463	{
	464	return (*pos <= NR_IRQS) ? pos : NULL;
	465	}
	466
	467	static void int_seq_next(struct seq_file f, void v, loff_t pos)
	468	{
	469	(*pos)++;
	470	if (*pos > NR_IRQS)
	471	return NULL;
	472	return pos;
	473	}
	474
	475	static void int_seq_stop(struct seq_file f, void v)
	476	{
	477	/* Nothing to do */
	478	}
	479
	480
	481	extern int show_interrupts(struct seq_file f, void v); /* In arch code */
	482	static struct seq_operations int_seq_ops = {
	483	.start = int_seq_start,
	484	.next = int_seq_next,
	485	.stop = int_seq_stop,
	486	.show = show_interrupts
	487	};
	488
	489	static int interrupts_open(struct inode inode, struct file filp)
	490	{
	491	return seq_open(filp, &int_seq_ops);
	492	}
	493
	494	static struct file_operations proc_interrupts_operations = {
	495	.open = interrupts_open,
	496	.read = seq_read,
	497	.llseek = seq_lseek,
	498	.release = seq_release,
	499	};
	500
	501	static int filesystems_read_proc(char page, char *start, off_t off,
	502	int count, int eof, void data)
	503	{
	504	int len = get_filesystem_list(page);
	505	return proc_calc_metrics(page, start, off, count, eof, len);
	506	}
	507
	508	static int cmdline_read_proc(char page, char *start, off_t off,
	509	int count, int eof, void data)
	510	{
	511	int len;
	512
	513	len = sprintf(page, "%s\n", saved_command_line);
	514	return proc_calc_metrics(page, start, off, count, eof, len);
	515	}
	516
	517	static int locks_read_proc(char page, char *start, off_t off,
	518	int count, int eof, void data)
	519	{
520	int len = get_locks_status(page, start, off, count);
521
522	if (len < count)
523	*eof = 1;
524	return len;
525	}
526
527	static int execdomains_read_proc(char page, char *start, off_t off,
528	int count, int eof, void data)
529	{
530	int len = get_exec_domain_list(page);
531	return proc_calc_metrics(page, start, off, count, eof, len);
532	}
533
534	#ifdef CONFIG_MAGIC_SYSRQ
535	/*
536	* writing 'C' to /proc/sysrq-trigger is like sysrq-C
537	*/
538	static ssize_t write_sysrq_trigger(struct file file, const char __user buf,
539	size_t count, loff_t *ppos)
540	{
541	if (count) {
542	char c;
543
544	if (get_user(c, buf))
545	return -EFAULT;
546	__handle_sysrq(c, NULL, NULL, 0);
547	}
548	return count;
549	}
550
551	static struct file_operations proc_sysrq_trigger_operations = {
552	.write = write_sysrq_trigger,
553	};
554	#endif
555
556	struct proc_dir_entry *proc_root_kcore;
557
558	void create_seq_entry(char name, mode_t mode, struct file_operations f)
559	{
560	struct proc_dir_entry *entry;
561	entry = create_proc_entry(name, mode, NULL);
562	if (entry)
563	entry->proc_fops = f;
564	}
565
566	void __init proc_misc_init(void)
567	{
568	struct proc_dir_entry *entry;
569	static struct {
570	char *name;
571	int (read_proc)(char,char*,off_t,int,int,void*);
572	} *p, simple_ones[] = {
573	{"loadavg", loadavg_read_proc},
574	{"uptime", uptime_read_proc},
575	{"meminfo", meminfo_read_proc},
576	{"version", version_read_proc},
577	#ifdef CONFIG_PROC_HARDWARE
578	{"hardware", hardware_read_proc},
579	#endif
580	#ifdef CONFIG_STRAM_PROC
581	{"stram", stram_read_proc},
582	#endif
583	{"devices", devices_read_proc},
584	{"filesystems", filesystems_read_proc},
585	{"cmdline", cmdline_read_proc},
586	{"locks", locks_read_proc},
587	{"execdomains", execdomains_read_proc},
588	{NULL,}
589	};
590	for (p = simple_ones; p->name; p++)
591	create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
592
593	proc_symlink("mounts", NULL, "self/mounts");
594
595	/* And now for trickier ones */
596	entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
597	if (entry)
598	entry->proc_fops = &proc_kmsg_operations;
599	create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
600	create_seq_entry("partitions", 0, &proc_partitions_operations);
601	create_seq_entry("stat", 0, &proc_stat_operations);
602	create_seq_entry("interrupts", 0, &proc_interrupts_operations);
603	create_seq_entry("slabinfo",S_IWUSR\|S_IRUGO,&proc_slabinfo_operations);
604	create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
605	create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
295ab934	606	create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
1da177e4 LT	607	create_seq_entry("diskstats", 0, &proc_diskstats_operations);
	608	#ifdef CONFIG_MODULES
	609	create_seq_entry("modules", 0, &proc_modules_operations);
	610	#endif
	611	#ifdef CONFIG_SCHEDSTATS
	612	create_seq_entry("schedstat", 0, &proc_schedstat_operations);
	613	#endif
	614	#ifdef CONFIG_PROC_KCORE
	615	proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
	616	if (proc_root_kcore) {
	617	proc_root_kcore->proc_fops = &proc_kcore_operations;
	618	proc_root_kcore->size =
	619	(size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
	620	}
	621	#endif
666bfddb VG	622	#ifdef CONFIG_PROC_VMCORE
	623	proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
	624	if (proc_vmcore)
	625	proc_vmcore->proc_fops = &proc_vmcore_operations;
	626	#endif
1da177e4 LT	627	#ifdef CONFIG_MAGIC_SYSRQ
	628	entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
	629	if (entry)
	630	entry->proc_fops = &proc_sysrq_trigger_operations;
	631	#endif
1da177e4	632	}