[mirror_ubuntu-artful-kernel.git] / fs / proc / array.c

/*
 *  linux/fs/proc/array.c
 *
 *  Copyright (C) 1992  by Linus Torvalds
 *  based on ideas by Darren Senn
 *
 * Fixes:
 * Michael. K. Johnson: stat,statm extensions.
 *                      <johnsonm@stolaf.edu>
 *
 * Pauline Middelink :  Made cmdline,envline only break at '\0's, to
 *                      make sure SET_PROCTITLE works. Also removed
 *                      bad '!' which forced address recalculation for
 *                      EVERY character on the current page.
 *                      <middelin@polyware.iaf.nl>
 *
 * Danny ter Haar    :	added cpuinfo
 *			<dth@cistron.nl>
 *
 * Alessandro Rubini :  profile extension.
 *                      <rubini@ipvvis.unipv.it>
 *
 * Jeff Tranter      :  added BogoMips field to cpuinfo
 *                      <Jeff_Tranter@Mitel.COM>
 *
 * Bruno Haible      :  remove 4K limit for the maps file
 *			<haible@ma2s2.mathematik.uni-karlsruhe.de>
 *
 * Yves Arrouye      :  remove removal of trailing spaces in get_array.
 *			<Yves.Arrouye@marin.fdn.fr>
 *
 * Jerome Forissier  :  added per-CPU time information to /proc/stat
 *                      and /proc/<pid>/cpu extension
 *                      <forissier@isia.cma.fr>
 *			- Incorporation and non-SMP safe operation
 *			of forissier patch in 2.1.78 by
 *			Hans Marcus <crowbar@concepts.nl>
 *
 * aeb@cwi.nl        :  /proc/partitions
 *
 *
 * Alan Cox	     :  security fixes.
 *			<Alan.Cox@linux.org>
 *
 * Al Viro           :  safe handling of mm_struct
 *
 * Gerhard Wichert   :  added BIGMEM support
 * Siemens AG           <Gerhard.Wichert@pdb.siemens.de>
 *
 * Al Viro & Jeff Garzik :  moved most of the thing into base.c and
 *			 :  proc_misc.c. The rest may eventually go into
 *			 :  base.c too.
 */

#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/mm.h>
#include <linux/hugetlb.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/signal.h>
#include <linux/highmem.h>
#include <linux/file.h>
#include <linux/times.h>
#include <linux/cpuset.h>
#include <linux/rcupdate.h>
#include <linux/delayacct.h>

#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/processor.h>
#include "internal.h"

/* Gcc optimizes away "strlen(x)" for constant x */
#define ADDBUF(buffer, string) \
do { memcpy(buffer, string, strlen(string)); \
     buffer += strlen(string); } while (0)

static inline char * task_name(struct task_struct *p, char * buf)
{
	int i;
	char * name;
	char tcomm[sizeof(p->comm)];

	get_task_comm(tcomm, p);

	ADDBUF(buf, "Name:\t");
	name = tcomm;
	i = sizeof(tcomm);
	do {
		unsigned char c = *name;
		name++;
		i--;
		*buf = c;
		if (!c)
			break;
		if (c == '\\') {
			buf[1] = c;
			buf += 2;
			continue;
		}
		if (c == '\n') {
			buf[0] = '\\';
			buf[1] = 'n';
			buf += 2;
			continue;
		}
		buf++;
	} while (i);
	*buf = '\n';
	return buf+1;
}

/*
 * The task state array is a strange "bitmap" of
 * reasons to sleep. Thus "running" is zero, and
 * you can test for combinations of others with
 * simple bit tests.
 */
static const char *task_state_array[] = {
	"R (running)",		/*  0 */
	"S (sleeping)",		/*  1 */
	"D (disk sleep)",	/*  2 */
	"T (stopped)",		/*  4 */
	"T (tracing stop)",	/*  8 */
	"Z (zombie)",		/* 16 */
	"X (dead)"		/* 32 */
};

static inline const char * get_task_state(struct task_struct *tsk)
{
	unsigned int state = (tsk->state & (TASK_RUNNING |
					    TASK_INTERRUPTIBLE |
					    TASK_UNINTERRUPTIBLE |
					    TASK_STOPPED |
					    TASK_TRACED)) |
			(tsk->exit_state & (EXIT_ZOMBIE |
					    EXIT_DEAD));
	const char **p = &task_state_array[0];

	while (state) {
		p++;
		state >>= 1;
	}
	return *p;
}

static inline char * task_state(struct task_struct *p, char *buffer)
{
	struct group_info *group_info;
	int g;
	struct fdtable *fdt = NULL;

	read_lock(&tasklist_lock);
	buffer += sprintf(buffer,
		"State:\t%s\n"
		"SleepAVG:\t%lu%%\n"
		"Tgid:\t%d\n"
		"Pid:\t%d\n"
		"PPid:\t%d\n"
		"TracerPid:\t%d\n"
		"Uid:\t%d\t%d\t%d\t%d\n"
		"Gid:\t%d\t%d\t%d\t%d\n",
		get_task_state(p),
		(p->sleep_avg/1024)*100/(1020000000/1024),
	       	p->tgid,
		p->pid, pid_alive(p) ? p->group_leader->real_parent->tgid : 0,
		pid_alive(p) && p->ptrace ? p->parent->pid : 0,
		p->uid, p->euid, p->suid, p->fsuid,
		p->gid, p->egid, p->sgid, p->fsgid);
	read_unlock(&tasklist_lock);
	task_lock(p);
	rcu_read_lock();
	if (p->files)
		fdt = files_fdtable(p->files);
	buffer += sprintf(buffer,
		"FDSize:\t%d\n"
		"Groups:\t",
		fdt ? fdt->max_fds : 0);
	rcu_read_unlock();

	group_info = p->group_info;
	get_group_info(group_info);
	task_unlock(p);

	for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
		buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
	put_group_info(group_info);

	buffer += sprintf(buffer, "\n");
	return buffer;
}

static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
{
	int i, len;

	len = strlen(header);
	memcpy(buffer, header, len);
	buffer += len;

	i = _NSIG;
	do {
		int x = 0;

		i -= 4;
		if (sigismember(set, i+1)) x |= 1;
		if (sigismember(set, i+2)) x |= 2;
		if (sigismember(set, i+3)) x |= 4;
		if (sigismember(set, i+4)) x |= 8;
		*buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
	} while (i >= 4);

	*buffer++ = '\n';
	*buffer = 0;
	return buffer;
}

static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
				    sigset_t *catch)
{
	struct k_sigaction *k;
	int i;

	k = p->sighand->action;
	for (i = 1; i <= _NSIG; ++i, ++k) {
		if (k->sa.sa_handler == SIG_IGN)
			sigaddset(ign, i);
		else if (k->sa.sa_handler != SIG_DFL)
			sigaddset(catch, i);
	}
}

static inline char * task_sig(struct task_struct *p, char *buffer)
{
	unsigned long flags;
	sigset_t pending, shpending, blocked, ignored, caught;
	int num_threads = 0;
	unsigned long qsize = 0;
	unsigned long qlim = 0;

	sigemptyset(&pending);
	sigemptyset(&shpending);
	sigemptyset(&blocked);
	sigemptyset(&ignored);
	sigemptyset(&caught);

	rcu_read_lock();
	if (lock_task_sighand(p, &flags)) {
		pending = p->pending.signal;
		shpending = p->signal->shared_pending.signal;
		blocked = p->blocked;
		collect_sigign_sigcatch(p, &ignored, &caught);
		num_threads = atomic_read(&p->signal->count);
		qsize = atomic_read(&p->user->sigpending);
		qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
		unlock_task_sighand(p, &flags);
	}
	rcu_read_unlock();

	buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
	buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);

	/* render them all */
	buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
	buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
	buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
	buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
	buffer = render_sigset_t("SigCgt:\t", &caught, buffer);

	return buffer;
}

static inline char *task_cap(struct task_struct *p, char *buffer)
{
    return buffer + sprintf(buffer, "CapInh:\t%016x\n"
			    "CapPrm:\t%016x\n"
			    "CapEff:\t%016x\n",
			    cap_t(p->cap_inheritable),
			    cap_t(p->cap_permitted),
			    cap_t(p->cap_effective));
}

int proc_pid_status(struct task_struct *task, char * buffer)
{
	char * orig = buffer;
	struct mm_struct *mm = get_task_mm(task);

	buffer = task_name(task, buffer);
	buffer = task_state(task, buffer);
 
	if (mm) {
		buffer = task_mem(mm, buffer);
		mmput(mm);
	}
	buffer = task_sig(task, buffer);
	buffer = task_cap(task, buffer);
	buffer = cpuset_task_status_allowed(task, buffer);
#if defined(CONFIG_S390)
	buffer = task_show_regs(task, buffer);
#endif
	return buffer - orig;
}

static int do_task_stat(struct task_struct *task, char * buffer, int whole)
{
	unsigned long vsize, eip, esp, wchan = ~0UL;
	long priority, nice;
	int tty_pgrp = -1, tty_nr = 0;
	sigset_t sigign, sigcatch;
	char state;
	int res;
 	pid_t ppid = 0, pgid = -1, sid = -1;
	int num_threads = 0;
	struct mm_struct *mm;
	unsigned long long start_time;
	unsigned long cmin_flt = 0, cmaj_flt = 0;
	unsigned long  min_flt = 0,  maj_flt = 0;
	cputime_t cutime, cstime, utime, stime;
	unsigned long rsslim = 0;
	char tcomm[sizeof(task->comm)];
	unsigned long flags;

	state = *get_task_state(task);
	vsize = eip = esp = 0;
	mm = get_task_mm(task);
	if (mm) {
		vsize = task_vsize(mm);
		eip = KSTK_EIP(task);
		esp = KSTK_ESP(task);
	}

	get_task_comm(tcomm, task);

	sigemptyset(&sigign);
	sigemptyset(&sigcatch);
	cutime = cstime = utime = stime = cputime_zero;

	mutex_lock(&tty_mutex);
	rcu_read_lock();
	if (lock_task_sighand(task, &flags)) {
		struct signal_struct *sig = task->signal;
		struct tty_struct *tty = sig->tty;

		if (tty) {
			/*
			 * sig->tty is not stable, but tty_mutex
			 * protects us from release_dev(tty)
			 */
			barrier();
			tty_pgrp = tty->pgrp;
			tty_nr = new_encode_dev(tty_devnum(tty));
		}

		num_threads = atomic_read(&sig->count);
		collect_sigign_sigcatch(task, &sigign, &sigcatch);

		cmin_flt = sig->cmin_flt;
		cmaj_flt = sig->cmaj_flt;
		cutime = sig->cutime;
		cstime = sig->cstime;
		rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;

		/* add up live thread stats at the group level */
		if (whole) {
			struct task_struct *t = task;
			do {
				min_flt += t->min_flt;
				maj_flt += t->maj_flt;
				utime = cputime_add(utime, t->utime);
				stime = cputime_add(stime, t->stime);
				t = next_thread(t);
			} while (t != task);

			min_flt += sig->min_flt;
			maj_flt += sig->maj_flt;
			utime = cputime_add(utime, sig->utime);
			stime = cputime_add(stime, sig->stime);
		}

		sid = sig->session;
		pgid = process_group(task);
		ppid = rcu_dereference(task->real_parent)->tgid;

		unlock_task_sighand(task, &flags);
	}
	rcu_read_unlock();
	mutex_unlock(&tty_mutex);

	if (!whole || num_threads<2)
		wchan = get_wchan(task);
	if (!whole) {
		min_flt = task->min_flt;
		maj_flt = task->maj_flt;
		utime = task->utime;
		stime = task->stime;
	}

	/* scale priority and nice values from timeslices to -20..20 */
	/* to make it look like a "normal" Unix priority/nice value  */
	priority = task_prio(task);
	nice = task_nice(task);

	/* Temporary variable needed for gcc-2.96 */
	/* convert timespec -> nsec*/
	start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
				+ task->start_time.tv_nsec;
	/* convert nsec -> ticks */
	start_time = nsec_to_clock_t(start_time);

	res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu %llu\n",
		task->pid,
		tcomm,
		state,
		ppid,
		pgid,
		sid,
		tty_nr,
		tty_pgrp,
		task->flags,
		min_flt,
		cmin_flt,
		maj_flt,
		cmaj_flt,
		cputime_to_clock_t(utime),
		cputime_to_clock_t(stime),
		cputime_to_clock_t(cutime),
		cputime_to_clock_t(cstime),
		priority,
		nice,
		num_threads,
		start_time,
		vsize,
		mm ? get_mm_rss(mm) : 0,
	        rsslim,
		mm ? mm->start_code : 0,
		mm ? mm->end_code : 0,
		mm ? mm->start_stack : 0,
		esp,
		eip,
		/* The signal information here is obsolete.
		 * It must be decimal for Linux 2.0 compatibility.
		 * Use /proc/#/status for real-time signals.
		 */
		task->pending.signal.sig[0] & 0x7fffffffUL,
		task->blocked.sig[0] & 0x7fffffffUL,
		sigign      .sig[0] & 0x7fffffffUL,
		sigcatch    .sig[0] & 0x7fffffffUL,
		wchan,
		0UL,
		0UL,
		task->exit_signal,
		task_cpu(task),
		task->rt_priority,
		task->policy,
		(unsigned long long)delayacct_blkio_ticks(task));
	if(mm)
		mmput(mm);
	return res;
}

int proc_tid_stat(struct task_struct *task, char * buffer)
{
	return do_task_stat(task, buffer, 0);
}

int proc_tgid_stat(struct task_struct *task, char * buffer)
{
	return do_task_stat(task, buffer, 1);
}

int proc_pid_statm(struct task_struct *task, char *buffer)
{
	int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
	struct mm_struct *mm = get_task_mm(task);
	
	if (mm) {
		size = task_statm(mm, &shared, &text, &data, &resident);
		mmput(mm);
	}

	return sprintf(buffer,"%d %d %d %d %d %d %d\n",
		       size, resident, shared, text, lib, data, 0);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/proc/array.c
	3	*
	4	* Copyright (C) 1992 by Linus Torvalds
	5	* based on ideas by Darren Senn
	6	*
	7	* Fixes:
	8	* Michael. K. Johnson: stat,statm extensions.
	9	* <johnsonm@stolaf.edu>
	10	*
	11	* Pauline Middelink : Made cmdline,envline only break at '\0's, to
	12	* make sure SET_PROCTITLE works. Also removed
	13	* bad '!' which forced address recalculation for
	14	* EVERY character on the current page.
	15	* <middelin@polyware.iaf.nl>
	16	*
	17	* Danny ter Haar : added cpuinfo
	18	* <dth@cistron.nl>
	19	*
	20	* Alessandro Rubini : profile extension.
	21	* <rubini@ipvvis.unipv.it>
	22	*
	23	* Jeff Tranter : added BogoMips field to cpuinfo
	24	* <Jeff_Tranter@Mitel.COM>
	25	*
	26	* Bruno Haible : remove 4K limit for the maps file
	27	* <haible@ma2s2.mathematik.uni-karlsruhe.de>
	28	*
	29	* Yves Arrouye : remove removal of trailing spaces in get_array.
	30	* <Yves.Arrouye@marin.fdn.fr>
	31	*
	32	* Jerome Forissier : added per-CPU time information to /proc/stat
	33	* and /proc/<pid>/cpu extension
	34	* <forissier@isia.cma.fr>
	35	* - Incorporation and non-SMP safe operation
	36	* of forissier patch in 2.1.78 by
	37	* Hans Marcus <crowbar@concepts.nl>
	38	*
	39	* aeb@cwi.nl : /proc/partitions
	40	*
	41	*
	42	* Alan Cox : security fixes.
	43	* <Alan.Cox@linux.org>
	44	*
	45	* Al Viro : safe handling of mm_struct
	46	*
	47	* Gerhard Wichert : added BIGMEM support
	48	* Siemens AG <Gerhard.Wichert@pdb.siemens.de>
	49	*
	50	* Al Viro & Jeff Garzik : moved most of the thing into base.c and
	51	* : proc_misc.c. The rest may eventually go into
	52	* : base.c too.
	53	*/
	54
1da177e4 LT	55	#include <linux/types.h>
	56	#include <linux/errno.h>
	57	#include <linux/time.h>
	58	#include <linux/kernel.h>
	59	#include <linux/kernel_stat.h>
	60	#include <linux/tty.h>
	61	#include <linux/string.h>
	62	#include <linux/mman.h>
	63	#include <linux/proc_fs.h>
	64	#include <linux/ioport.h>
	65	#include <linux/mm.h>
	66	#include <linux/hugetlb.h>
	67	#include <linux/pagemap.h>
	68	#include <linux/swap.h>
	69	#include <linux/slab.h>
	70	#include <linux/smp.h>
	71	#include <linux/signal.h>
	72	#include <linux/highmem.h>
	73	#include <linux/file.h>
	74	#include <linux/times.h>
	75	#include <linux/cpuset.h>
4fb3a538	76	#include <linux/rcupdate.h>
25890454	77	#include <linux/delayacct.h>
1da177e4 LT	78
	79	#include <asm/uaccess.h>
	80	#include <asm/pgtable.h>
	81	#include <asm/io.h>
	82	#include <asm/processor.h>
	83	#include "internal.h"
	84
	85	/* Gcc optimizes away "strlen(x)" for constant x */
	86	#define ADDBUF(buffer, string) \
	87	do { memcpy(buffer, string, strlen(string)); \
	88	buffer += strlen(string); } while (0)
	89
	90	static inline char * task_name(struct task_struct p, char buf)
	91	{
	92	int i;
	93	char * name;
	94	char tcomm[sizeof(p->comm)];
	95
	96	get_task_comm(tcomm, p);
	97
	98	ADDBUF(buf, "Name:\t");
	99	name = tcomm;
	100	i = sizeof(tcomm);
	101	do {
	102	unsigned char c = *name;
	103	name++;
	104	i--;
	105	*buf = c;
	106	if (!c)
	107	break;
	108	if (c == '\\') {
	109	buf[1] = c;
	110	buf += 2;
	111	continue;
	112	}
	113	if (c == '\n') {
	114	buf[0] = '\\';
	115	buf[1] = 'n';
	116	buf += 2;
	117	continue;
	118	}
	119	buf++;
	120	} while (i);
	121	*buf = '\n';
	122	return buf+1;
	123	}
	124
	125	/*
	126	* The task state array is a strange "bitmap" of
	127	* reasons to sleep. Thus "running" is zero, and
	128	* you can test for combinations of others with
	129	* simple bit tests.
	130	*/
	131	static const char *task_state_array[] = {
	132	"R (running)", /* 0 */
	133	"S (sleeping)", /* 1 */
	134	"D (disk sleep)", /* 2 */
	135	"T (stopped)", /* 4 */
	136	"T (tracing stop)", /* 8 */
	137	"Z (zombie)", /* 16 */
	138	"X (dead)" /* 32 */
	139	};
	140
	141	static inline const char * get_task_state(struct task_struct *tsk)
142	{
143	unsigned int state = (tsk->state & (TASK_RUNNING \|
144	TASK_INTERRUPTIBLE \|
145	TASK_UNINTERRUPTIBLE \|
146	TASK_STOPPED \|
147	TASK_TRACED)) \|
148	(tsk->exit_state & (EXIT_ZOMBIE \|
149	EXIT_DEAD));
150	const char **p = &task_state_array[0];
151
152	while (state) {
153	p++;
154	state >>= 1;
155	}
156	return *p;
157	}
158
159	static inline char * task_state(struct task_struct p, char buffer)
160	{
161	struct group_info *group_info;
162	int g;
badf1662	163	struct fdtable *fdt = NULL;
1da177e4 LT	164
	165	read_lock(&tasklist_lock);
	166	buffer += sprintf(buffer,
	167	"State:\t%s\n"
	168	"SleepAVG:\t%lu%%\n"
	169	"Tgid:\t%d\n"
	170	"Pid:\t%d\n"
	171	"PPid:\t%d\n"
	172	"TracerPid:\t%d\n"
	173	"Uid:\t%d\t%d\t%d\t%d\n"
	174	"Gid:\t%d\t%d\t%d\t%d\n",
	175	get_task_state(p),
	176	(p->sleep_avg/1024)*100/(1020000000/1024),
	177	p->tgid,
	178	p->pid, pid_alive(p) ? p->group_leader->real_parent->tgid : 0,
	179	pid_alive(p) && p->ptrace ? p->parent->pid : 0,
	180	p->uid, p->euid, p->suid, p->fsuid,
	181	p->gid, p->egid, p->sgid, p->fsgid);
	182	read_unlock(&tasklist_lock);
	183	task_lock(p);
4fb3a538	184	rcu_read_lock();
badf1662 DS	185	if (p->files)
badf1662 DS	186	fdt = files_fdtable(p->files);
1da177e4 LT	187	buffer += sprintf(buffer,
	188	"FDSize:\t%d\n"
	189	"Groups:\t",
badf1662	190	fdt ? fdt->max_fds : 0);
4fb3a538	191	rcu_read_unlock();
1da177e4 LT	192
	193	group_info = p->group_info;
	194	get_group_info(group_info);
	195	task_unlock(p);
	196
	197	for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
	198	buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
	199	put_group_info(group_info);
	200
	201	buffer += sprintf(buffer, "\n");
	202	return buffer;
	203	}
	204
	205	static char * render_sigset_t(const char header, sigset_t set, char *buffer)
	206	{
	207	int i, len;
	208
	209	len = strlen(header);
	210	memcpy(buffer, header, len);
	211	buffer += len;
	212
	213	i = _NSIG;
	214	do {
	215	int x = 0;
	216
	217	i -= 4;
	218	if (sigismember(set, i+1)) x \|= 1;
	219	if (sigismember(set, i+2)) x \|= 2;
	220	if (sigismember(set, i+3)) x \|= 4;
	221	if (sigismember(set, i+4)) x \|= 8;
	222	*buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
	223	} while (i >= 4);
	224
	225	*buffer++ = '\n';
	226	*buffer = 0;
	227	return buffer;
	228	}
	229
	230	static void collect_sigign_sigcatch(struct task_struct p, sigset_t ign,
	231	sigset_t *catch)
	232	{
	233	struct k_sigaction *k;
	234	int i;
	235
	236	k = p->sighand->action;
	237	for (i = 1; i <= _NSIG; ++i, ++k) {
	238	if (k->sa.sa_handler == SIG_IGN)
	239	sigaddset(ign, i);
	240	else if (k->sa.sa_handler != SIG_DFL)
	241	sigaddset(catch, i);
	242	}
	243	}
	244
	245	static inline char * task_sig(struct task_struct p, char buffer)
	246	{
5e6b3f42	247	unsigned long flags;
1da177e4 LT	248	sigset_t pending, shpending, blocked, ignored, caught;
	249	int num_threads = 0;
	250	unsigned long qsize = 0;
	251	unsigned long qlim = 0;
	252
	253	sigemptyset(&pending);
	254	sigemptyset(&shpending);
	255	sigemptyset(&blocked);
	256	sigemptyset(&ignored);
	257	sigemptyset(&caught);
	258
5e6b3f42 ON	259	rcu_read_lock();
5e6b3f42 ON	260	if (lock_task_sighand(p, &flags)) {
1da177e4 LT	261	pending = p->pending.signal;
	262	shpending = p->signal->shared_pending.signal;
	263	blocked = p->blocked;
	264	collect_sigign_sigcatch(p, &ignored, &caught);
	265	num_threads = atomic_read(&p->signal->count);
	266	qsize = atomic_read(&p->user->sigpending);
	267	qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
5e6b3f42	268	unlock_task_sighand(p, &flags);
1da177e4	269	}
5e6b3f42	270	rcu_read_unlock();
1da177e4 LT	271
	272	buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
	273	buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);
	274
	275	/* render them all */
	276	buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
	277	buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
	278	buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
	279	buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
	280	buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
	281
	282	return buffer;
	283	}
	284
	285	static inline char task_cap(struct task_struct p, char *buffer)
	286	{
	287	return buffer + sprintf(buffer, "CapInh:\t%016x\n"
	288	"CapPrm:\t%016x\n"
	289	"CapEff:\t%016x\n",
	290	cap_t(p->cap_inheritable),
	291	cap_t(p->cap_permitted),
	292	cap_t(p->cap_effective));
	293	}
	294
	295	int proc_pid_status(struct task_struct task, char buffer)
	296	{
	297	char * orig = buffer;
	298	struct mm_struct *mm = get_task_mm(task);
	299
	300	buffer = task_name(task, buffer);
	301	buffer = task_state(task, buffer);
	302
	303	if (mm) {
	304	buffer = task_mem(mm, buffer);
	305	mmput(mm);
	306	}
	307	buffer = task_sig(task, buffer);
	308	buffer = task_cap(task, buffer);
	309	buffer = cpuset_task_status_allowed(task, buffer);
347a8dc3	310	#if defined(CONFIG_S390)
1da177e4 LT	311	buffer = task_show_regs(task, buffer);
	312	#endif
	313	return buffer - orig;
	314	}
	315
	316	static int do_task_stat(struct task_struct task, char buffer, int whole)
	317	{
	318	unsigned long vsize, eip, esp, wchan = ~0UL;
	319	long priority, nice;
	320	int tty_pgrp = -1, tty_nr = 0;
	321	sigset_t sigign, sigcatch;
	322	char state;
	323	int res;
a593d6ed	324	pid_t ppid = 0, pgid = -1, sid = -1;
1da177e4 LT	325	int num_threads = 0;
	326	struct mm_struct *mm;
	327	unsigned long long start_time;
	328	unsigned long cmin_flt = 0, cmaj_flt = 0;
	329	unsigned long min_flt = 0, maj_flt = 0;
	330	cputime_t cutime, cstime, utime, stime;
	331	unsigned long rsslim = 0;
1da177e4	332	char tcomm[sizeof(task->comm)];
a593d6ed	333	unsigned long flags;
1da177e4 LT	334
	335	state = *get_task_state(task);
	336	vsize = eip = esp = 0;
	337	mm = get_task_mm(task);
	338	if (mm) {
	339	vsize = task_vsize(mm);
	340	eip = KSTK_EIP(task);
	341	esp = KSTK_ESP(task);
	342	}
	343
	344	get_task_comm(tcomm, task);
	345
	346	sigemptyset(&sigign);
	347	sigemptyset(&sigcatch);
	348	cutime = cstime = utime = stime = cputime_zero;
3cfd0885 AC	349
3cfd0885 AC	350	mutex_lock(&tty_mutex);
a593d6ed ON	351	rcu_read_lock();
	352	if (lock_task_sighand(task, &flags)) {
	353	struct signal_struct *sig = task->signal;
	354	struct tty_struct *tty = sig->tty;
	355
	356	if (tty) {
	357	/*
	358	* sig->tty is not stable, but tty_mutex
	359	* protects us from release_dev(tty)
	360	*/
	361	barrier();
	362	tty_pgrp = tty->pgrp;
	363	tty_nr = new_encode_dev(tty_devnum(tty));
	364	}
	365
	366	num_threads = atomic_read(&sig->count);
1da177e4 LT	367	collect_sigign_sigcatch(task, &sigign, &sigcatch);
1da177e4 LT	368
a593d6ed ON	369	cmin_flt = sig->cmin_flt;
	370	cmaj_flt = sig->cmaj_flt;
	371	cutime = sig->cutime;
	372	cstime = sig->cstime;
	373	rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;
	374
1da177e4 LT	375	/* add up live thread stats at the group level */
1da177e4 LT	376	if (whole) {
a593d6ed	377	struct task_struct *t = task;
1da177e4 LT	378	do {
	379	min_flt += t->min_flt;
	380	maj_flt += t->maj_flt;
	381	utime = cputime_add(utime, t->utime);
	382	stime = cputime_add(stime, t->stime);
	383	t = next_thread(t);
	384	} while (t != task);
1da177e4	385
a593d6ed ON	386	min_flt += sig->min_flt;
	387	maj_flt += sig->maj_flt;
	388	utime = cputime_add(utime, sig->utime);
	389	stime = cputime_add(stime, sig->stime);
1da177e4	390	}
a593d6ed ON	391
a593d6ed ON	392	sid = sig->session;
1da177e4	393	pgid = process_group(task);
a593d6ed ON	394	ppid = rcu_dereference(task->real_parent)->tgid;
	395
	396	unlock_task_sighand(task, &flags);
1da177e4	397	}
a593d6ed	398	rcu_read_unlock();
3cfd0885	399	mutex_unlock(&tty_mutex);
1da177e4 LT	400
	401	if (!whole \|\| num_threads<2)
	402	wchan = get_wchan(task);
	403	if (!whole) {
	404	min_flt = task->min_flt;
	405	maj_flt = task->maj_flt;
	406	utime = task->utime;
	407	stime = task->stime;
	408	}
	409
	410	/* scale priority and nice values from timeslices to -20..20 */
	411	/* to make it look like a "normal" Unix priority/nice value */
	412	priority = task_prio(task);
	413	nice = task_nice(task);
	414
	415	/* Temporary variable needed for gcc-2.96 */
	416	/* convert timespec -> nsec*/
	417	start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
	418	+ task->start_time.tv_nsec;
	419	/* convert nsec -> ticks */
	420	start_time = nsec_to_clock_t(start_time);
	421
	422	res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
4dee26b7	423	%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
25890454	424	%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu %llu\n",
1da177e4 LT	425	task->pid,
	426	tcomm,
	427	state,
	428	ppid,
	429	pgid,
	430	sid,
	431	tty_nr,
	432	tty_pgrp,
	433	task->flags,
	434	min_flt,
	435	cmin_flt,
	436	maj_flt,
	437	cmaj_flt,
	438	cputime_to_clock_t(utime),
	439	cputime_to_clock_t(stime),
	440	cputime_to_clock_t(cutime),
	441	cputime_to_clock_t(cstime),
	442	priority,
	443	nice,
	444	num_threads,
1da177e4 LT	445	start_time,
1da177e4 LT	446	vsize,
4294621f	447	mm ? get_mm_rss(mm) : 0,
1da177e4 LT	448	rsslim,
	449	mm ? mm->start_code : 0,
	450	mm ? mm->end_code : 0,
	451	mm ? mm->start_stack : 0,
	452	esp,
	453	eip,
	454	/* The signal information here is obsolete.
	455	* It must be decimal for Linux 2.0 compatibility.
	456	* Use /proc/#/status for real-time signals.
	457	*/
	458	task->pending.signal.sig[0] & 0x7fffffffUL,
	459	task->blocked.sig[0] & 0x7fffffffUL,
	460	sigign .sig[0] & 0x7fffffffUL,
	461	sigcatch .sig[0] & 0x7fffffffUL,
	462	wchan,
	463	0UL,
	464	0UL,
	465	task->exit_signal,
	466	task_cpu(task),
	467	task->rt_priority,
25890454 SN	468	task->policy,
25890454 SN	469	(unsigned long long)delayacct_blkio_ticks(task));
1da177e4 LT	470	if(mm)
	471	mmput(mm);
	472	return res;
	473	}
	474
	475	int proc_tid_stat(struct task_struct task, char buffer)
	476	{
	477	return do_task_stat(task, buffer, 0);
	478	}
	479
	480	int proc_tgid_stat(struct task_struct task, char buffer)
	481	{
	482	return do_task_stat(task, buffer, 1);
	483	}
	484
	485	int proc_pid_statm(struct task_struct task, char buffer)
	486	{
	487	int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
	488	struct mm_struct *mm = get_task_mm(task);
	489
	490	if (mm) {
	491	size = task_statm(mm, &shared, &text, &data, &resident);
	492	mmput(mm);
	493	}
	494
	495	return sprintf(buffer,"%d %d %d %d %d %d %d\n",
	496	size, resident, shared, text, lib, data, 0);
	497	}