[linux.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.
 *                      <[email protected]>
 *
 * 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.
 *                      <[email protected]>
 *
 * Danny ter Haar    :	added cpuinfo
 *			<[email protected]>
 *
 * Alessandro Rubini :  profile extension.
 *                      <[email protected]>
 *
 * Jeff Tranter      :  added BogoMips field to cpuinfo
 *                      <[email protected]>
 *
 * Bruno Haible      :  remove 4K limit for the maps file
 *			<[email protected]>
 *
 * Yves Arrouye      :  remove removal of trailing spaces in get_array.
 *			<[email protected]>
 *
 * Jerome Forissier  :  added per-CPU time information to /proc/stat
 *                      and /proc/<pid>/cpu extension
 *                      <[email protected]>
 *			- Incorporation and non-SMP safe operation
 *			of forissier patch in 2.1.78 by
 *			Hans Marcus <[email protected]>
 *
 * [email protected]        :  /proc/partitions
 *
 *
 * Alan Cox	     :  security fixes.
 *			<[email protected]>
 *
 * Al Viro           :  safe handling of mm_struct
 *
 * Gerhard Wichert   :  added BIGMEM support
 * Siemens AG           <[email protected]>
 *
 * 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/uaccess.h>
#include <linux/io.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/fdtable.h>
#include <linux/times.h>
#include <linux/cpuset.h>
#include <linux/rcupdate.h>
#include <linux/delayacct.h>
#include <linux/seq_file.h>
#include <linux/pid_namespace.h>
#include <linux/ptrace.h>
#include <linux/tracehook.h>

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

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

	get_task_comm(tcomm, p);

	seq_printf(m, "Name:\t");
	end = m->buf + m->size;
	buf = m->buf + m->count;
	name = tcomm;
	i = sizeof(tcomm);
	while (i && (buf < end)) {
		unsigned char c = *name;
		name++;
		i--;
		*buf = c;
		if (!c)
			break;
		if (c == '\\') {
			buf++;
			if (buf < end)
				*buf++ = c;
			continue;
		}
		if (c == '\n') {
			*buf++ = '\\';
			if (buf < end)
				*buf++ = 'n';
			continue;
		}
		buf++;
	}
	m->count = buf - m->buf;
	seq_printf(m, "\n");
}

/*
 * 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_REPORT) | tsk->exit_state;
	const char **p = &task_state_array[0];

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

static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
				struct pid *pid, struct task_struct *p)
{
	struct group_info *group_info;
	int g;
	struct fdtable *fdt = NULL;
	const struct cred *cred;
	pid_t ppid, tpid;

	rcu_read_lock();
	ppid = pid_alive(p) ?
		task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
	tpid = 0;
	if (pid_alive(p)) {
		struct task_struct *tracer = tracehook_tracer_task(p);
		if (tracer)
			tpid = task_pid_nr_ns(tracer, ns);
	}
	cred = get_cred((struct cred *) __task_cred(p));
	seq_printf(m,
		"State:\t%s\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),
		task_tgid_nr_ns(p, ns),
		pid_nr_ns(pid, ns),
		ppid, tpid,
		cred->uid, cred->euid, cred->suid, cred->fsuid,
		cred->gid, cred->egid, cred->sgid, cred->fsgid);

	task_lock(p);
	if (p->files)
		fdt = files_fdtable(p->files);
	seq_printf(m,
		"FDSize:\t%d\n"
		"Groups:\t",
		fdt ? fdt->max_fds : 0);
	rcu_read_unlock();

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

	for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
		seq_printf(m, "%d ", GROUP_AT(group_info, g));
	put_cred(cred);

	seq_printf(m, "\n");
}

static void render_sigset_t(struct seq_file *m, const char *header,
				sigset_t *set)
{
	int i;

	seq_printf(m, "%s", header);

	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;
		seq_printf(m, "%x", x);
	} while (i >= 4);

	seq_printf(m, "\n");
}

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 void task_sig(struct seq_file *m, struct task_struct *p)
{
	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);

	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(&__task_cred(p)->user->sigpending);
		qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
		unlock_task_sighand(p, &flags);
	}

	seq_printf(m, "Threads:\t%d\n", num_threads);
	seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);

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

static void render_cap_t(struct seq_file *m, const char *header,
			kernel_cap_t *a)
{
	unsigned __capi;

	seq_printf(m, "%s", header);
	CAP_FOR_EACH_U32(__capi) {
		seq_printf(m, "%08x",
			   a->cap[(_KERNEL_CAPABILITY_U32S-1) - __capi]);
	}
	seq_printf(m, "\n");
}

static inline void task_cap(struct seq_file *m, struct task_struct *p)
{
	const struct cred *cred;
	kernel_cap_t cap_inheritable, cap_permitted, cap_effective, cap_bset;

	rcu_read_lock();
	cred = __task_cred(p);
	cap_inheritable	= cred->cap_inheritable;
	cap_permitted	= cred->cap_permitted;
	cap_effective	= cred->cap_effective;
	cap_bset	= cred->cap_bset;
	rcu_read_unlock();

	render_cap_t(m, "CapInh:\t", &cap_inheritable);
	render_cap_t(m, "CapPrm:\t", &cap_permitted);
	render_cap_t(m, "CapEff:\t", &cap_effective);
	render_cap_t(m, "CapBnd:\t", &cap_bset);
}

static inline void task_context_switch_counts(struct seq_file *m,
						struct task_struct *p)
{
	seq_printf(m,	"voluntary_ctxt_switches:\t%lu\n"
			"nonvoluntary_ctxt_switches:\t%lu\n",
			p->nvcsw,
			p->nivcsw);
}

int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
			struct pid *pid, struct task_struct *task)
{
	struct mm_struct *mm = get_task_mm(task);

	task_name(m, task);
	task_state(m, ns, pid, task);

	if (mm) {
		task_mem(m, mm);
		mmput(mm);
	}
	task_sig(m, task);
	task_cap(m, task);
	cpuset_task_status_allowed(m, task);
#if defined(CONFIG_S390)
	task_show_regs(m, task);
#endif
	task_context_switch_counts(m, task);
	return 0;
}

static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
			struct pid *pid, struct task_struct *task, 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;
	pid_t ppid = 0, pgid = -1, sid = -1;
	int num_threads = 0;
	int permitted;
	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;
	cputime_t cgtime, gtime;
	unsigned long rsslim = 0;
	char tcomm[sizeof(task->comm)];
	unsigned long flags;

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

	get_task_comm(tcomm, task);

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

	if (lock_task_sighand(task, &flags)) {
		struct signal_struct *sig = task->signal;

		if (sig->tty) {
			struct pid *pgrp = tty_get_pgrp(sig->tty);
			tty_pgrp = pid_nr_ns(pgrp, ns);
			put_pid(pgrp);
			tty_nr = new_encode_dev(tty_devnum(sig->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;
		cgtime = sig->cgtime;
		rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;

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

			min_flt += sig->min_flt;
			maj_flt += sig->maj_flt;
			thread_group_cputime(task, &cputime);
			utime = cputime.utime;
			stime = cputime.stime;
			gtime = cputime_add(gtime, sig->gtime);
		}

		sid = task_session_nr_ns(task, ns);
		ppid = task_tgid_nr_ns(task->real_parent, ns);
		pgid = task_pgrp_nr_ns(task, ns);

		unlock_task_sighand(task, &flags);
	}

	if (permitted && (!whole || num_threads < 2))
		wchan = get_wchan(task);
	if (!whole) {
		min_flt = task->min_flt;
		maj_flt = task->maj_flt;
		utime = task_utime(task);
		stime = task_stime(task);
		gtime = task_gtime(task);
	}

	/* 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->real_start_time.tv_sec * NSEC_PER_SEC
				+ task->real_start_time.tv_nsec;
	/* convert nsec -> ticks */
	start_time = nsec_to_clock_t(start_time);

	seq_printf(m, "%d (%s) %c %d %d %d %d %d %u %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 %u %u %llu %lu %ld\n",
		pid_nr_ns(pid, ns),
		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,
		(permitted && 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),
		cputime_to_clock_t(gtime),
		cputime_to_clock_t(cgtime));
	if (mm)
		mmput(mm);
	return 0;
}

int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
			struct pid *pid, struct task_struct *task)
{
	return do_task_stat(m, ns, pid, task, 0);
}

int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
			struct pid *pid, struct task_struct *task)
{
	return do_task_stat(m, ns, pid, task, 1);
}

int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
			struct pid *pid, struct task_struct *task)
{
	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);
	}
	seq_printf(m, "%d %d %d %d %d %d %d\n",
			size, resident, shared, text, lib, data, 0);

	return 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	* <[email protected]>
	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	* <[email protected]>
	16	*
	17	* Danny ter Haar : added cpuinfo
	18	* <[email protected]>
	19	*
	20	* Alessandro Rubini : profile extension.
	21	* <[email protected]>
	22	*
	23	* Jeff Tranter : added BogoMips field to cpuinfo
	24	* <[email protected]>
	25	*
	26	* Bruno Haible : remove 4K limit for the maps file
	27	* <[email protected]>
	28	*
	29	* Yves Arrouye : remove removal of trailing spaces in get_array.
	30	* <[email protected]>
	31	*
	32	* Jerome Forissier : added per-CPU time information to /proc/stat
	33	* and /proc/<pid>/cpu extension
	34	* <[email protected]>
	35	* - Incorporation and non-SMP safe operation
	36	* of forissier patch in 2.1.78 by
	37	* Hans Marcus <[email protected]>
	38	*
	39	* [email protected] : /proc/partitions
	40	*
	41	*
	42	* Alan Cox : security fixes.
526719ba	43	* <[email protected]>
1da177e4 LT	44	*
	45	* Al Viro : safe handling of mm_struct
	46	*
	47	* Gerhard Wichert : added BIGMEM support
	48	* Siemens AG <[email protected]>
	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>
8ea02606 IM	65	#include <linux/uaccess.h>
8ea02606 IM	66	#include <linux/io.h>
1da177e4 LT	67	#include <linux/mm.h>
	68	#include <linux/hugetlb.h>
	69	#include <linux/pagemap.h>
	70	#include <linux/swap.h>
	71	#include <linux/slab.h>
	72	#include <linux/smp.h>
	73	#include <linux/signal.h>
	74	#include <linux/highmem.h>
	75	#include <linux/file.h>
9f3acc31	76	#include <linux/fdtable.h>
1da177e4 LT	77	#include <linux/times.h>
1da177e4 LT	78	#include <linux/cpuset.h>
4fb3a538	79	#include <linux/rcupdate.h>
25890454	80	#include <linux/delayacct.h>
ee992744	81	#include <linux/seq_file.h>
b488893a	82	#include <linux/pid_namespace.h>
f83ce3e6	83	#include <linux/ptrace.h>
0d094efe	84	#include <linux/tracehook.h>
1da177e4	85
1da177e4	86	#include <asm/pgtable.h>
1da177e4 LT	87	#include <asm/processor.h>
	88	#include "internal.h"
	89
df5f8314	90	static inline void task_name(struct seq_file m, struct task_struct p)
1da177e4 LT	91	{
1da177e4 LT	92	int i;
df5f8314	93	char buf, end;
8ea02606	94	char *name;
1da177e4 LT	95	char tcomm[sizeof(p->comm)];
	96
	97	get_task_comm(tcomm, p);
	98
df5f8314 EB	99	seq_printf(m, "Name:\t");
	100	end = m->buf + m->size;
	101	buf = m->buf + m->count;
1da177e4 LT	102	name = tcomm;
1da177e4 LT	103	i = sizeof(tcomm);
df5f8314	104	while (i && (buf < end)) {
1da177e4 LT	105	unsigned char c = *name;
	106	name++;
	107	i--;
	108	*buf = c;
	109	if (!c)
	110	break;
	111	if (c == '\\') {
df5f8314 EB	112	buf++;
	113	if (buf < end)
	114	*buf++ = c;
1da177e4 LT	115	continue;
	116	}
	117	if (c == '\n') {
df5f8314 EB	118	*buf++ = '\\';
	119	if (buf < end)
	120	*buf++ = 'n';
1da177e4 LT	121	continue;
	122	}
	123	buf++;
df5f8314 EB	124	}
	125	m->count = buf - m->buf;
	126	seq_printf(m, "\n");
1da177e4 LT	127	}
	128
	129	/*
	130	* The task state array is a strange "bitmap" of
	131	* reasons to sleep. Thus "running" is zero, and
	132	* you can test for combinations of others with
	133	* simple bit tests.
	134	*/
	135	static const char *task_state_array[] = {
	136	"R (running)", /* 0 */
	137	"S (sleeping)", /* 1 */
	138	"D (disk sleep)", /* 2 */
	139	"T (stopped)", /* 4 */
	140	"T (tracing stop)", /* 8 */
	141	"Z (zombie)", /* 16 */
	142	"X (dead)" /* 32 */
	143	};
	144
8ea02606	145	static inline const char get_task_state(struct task_struct tsk)
1da177e4	146	{
1587e2b1	147	unsigned int state = (tsk->state & TASK_REPORT) \| tsk->exit_state;
1da177e4 LT	148	const char **p = &task_state_array[0];
	149
	150	while (state) {
	151	p++;
	152	state >>= 1;
	153	}
	154	return *p;
	155	}
	156
df5f8314 EB	157	static inline void task_state(struct seq_file m, struct pid_namespace ns,
df5f8314 EB	158	struct pid pid, struct task_struct p)
1da177e4 LT	159	{
	160	struct group_info *group_info;
	161	int g;
badf1662	162	struct fdtable *fdt = NULL;
c69e8d9c	163	const struct cred *cred;
b488893a	164	pid_t ppid, tpid;
1da177e4	165
b0fa9db6	166	rcu_read_lock();
b488893a PE	167	ppid = pid_alive(p) ?
b488893a PE	168	task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
0d094efe RM	169	tpid = 0;
	170	if (pid_alive(p)) {
	171	struct task_struct *tracer = tracehook_tracer_task(p);
	172	if (tracer)
	173	tpid = task_pid_nr_ns(tracer, ns);
	174	}
c69e8d9c	175	cred = get_cred((struct cred *) __task_cred(p));
df5f8314	176	seq_printf(m,
1da177e4	177	"State:\t%s\n"
1da177e4 LT	178	"Tgid:\t%d\n"
	179	"Pid:\t%d\n"
	180	"PPid:\t%d\n"
	181	"TracerPid:\t%d\n"
	182	"Uid:\t%d\t%d\t%d\t%d\n"
	183	"Gid:\t%d\t%d\t%d\t%d\n",
	184	get_task_state(p),
b488893a	185	task_tgid_nr_ns(p, ns),
df5f8314	186	pid_nr_ns(pid, ns),
b488893a	187	ppid, tpid,
c69e8d9c DH	188	cred->uid, cred->euid, cred->suid, cred->fsuid,
c69e8d9c DH	189	cred->gid, cred->egid, cred->sgid, cred->fsgid);
b0fa9db6	190
1da177e4	191	task_lock(p);
badf1662 DS	192	if (p->files)
badf1662 DS	193	fdt = files_fdtable(p->files);
df5f8314	194	seq_printf(m,
1da177e4 LT	195	"FDSize:\t%d\n"
1da177e4 LT	196	"Groups:\t",
badf1662	197	fdt ? fdt->max_fds : 0);
4fb3a538	198	rcu_read_unlock();
1da177e4	199
c69e8d9c	200	group_info = cred->group_info;
1da177e4 LT	201	task_unlock(p);
1da177e4 LT	202
8ea02606	203	for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
df5f8314	204	seq_printf(m, "%d ", GROUP_AT(group_info, g));
c69e8d9c	205	put_cred(cred);
1da177e4	206
df5f8314	207	seq_printf(m, "\n");
1da177e4 LT	208	}
1da177e4 LT	209
df5f8314 EB	210	static void render_sigset_t(struct seq_file m, const char header,
df5f8314 EB	211	sigset_t *set)
1da177e4	212	{
df5f8314	213	int i;
1da177e4	214
df5f8314	215	seq_printf(m, "%s", header);
1da177e4 LT	216
	217	i = _NSIG;
	218	do {
	219	int x = 0;
	220
	221	i -= 4;
	222	if (sigismember(set, i+1)) x \|= 1;
	223	if (sigismember(set, i+2)) x \|= 2;
	224	if (sigismember(set, i+3)) x \|= 4;
	225	if (sigismember(set, i+4)) x \|= 8;
df5f8314	226	seq_printf(m, "%x", x);
1da177e4 LT	227	} while (i >= 4);
1da177e4 LT	228
df5f8314	229	seq_printf(m, "\n");
1da177e4 LT	230	}
	231
	232	static void collect_sigign_sigcatch(struct task_struct p, sigset_t ign,
	233	sigset_t *catch)
	234	{
	235	struct k_sigaction *k;
	236	int i;
	237
	238	k = p->sighand->action;
	239	for (i = 1; i <= _NSIG; ++i, ++k) {
	240	if (k->sa.sa_handler == SIG_IGN)
	241	sigaddset(ign, i);
	242	else if (k->sa.sa_handler != SIG_DFL)
	243	sigaddset(catch, i);
	244	}
	245	}
	246
df5f8314	247	static inline void task_sig(struct seq_file m, struct task_struct p)
1da177e4	248	{
5e6b3f42	249	unsigned long flags;
1da177e4 LT	250	sigset_t pending, shpending, blocked, ignored, caught;
	251	int num_threads = 0;
	252	unsigned long qsize = 0;
	253	unsigned long qlim = 0;
	254
	255	sigemptyset(&pending);
	256	sigemptyset(&shpending);
	257	sigemptyset(&blocked);
	258	sigemptyset(&ignored);
	259	sigemptyset(&caught);
	260
5e6b3f42	261	if (lock_task_sighand(p, &flags)) {
1da177e4 LT	262	pending = p->pending.signal;
	263	shpending = p->signal->shared_pending.signal;
	264	blocked = p->blocked;
	265	collect_sigign_sigcatch(p, &ignored, &caught);
	266	num_threads = atomic_read(&p->signal->count);
c69e8d9c	267	qsize = atomic_read(&__task_cred(p)->user->sigpending);
1da177e4	268	qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
5e6b3f42	269	unlock_task_sighand(p, &flags);
1da177e4	270	}
1da177e4	271
df5f8314 EB	272	seq_printf(m, "Threads:\t%d\n", num_threads);
df5f8314 EB	273	seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim);
1da177e4 LT	274
1da177e4 LT	275	/* render them all */
df5f8314 EB	276	render_sigset_t(m, "SigPnd:\t", &pending);
	277	render_sigset_t(m, "ShdPnd:\t", &shpending);
	278	render_sigset_t(m, "SigBlk:\t", &blocked);
	279	render_sigset_t(m, "SigIgn:\t", &ignored);
	280	render_sigset_t(m, "SigCgt:\t", &caught);
1da177e4 LT	281	}
1da177e4 LT	282
df5f8314 EB	283	static void render_cap_t(struct seq_file m, const char header,
df5f8314 EB	284	kernel_cap_t *a)
e338d263 AM	285	{
	286	unsigned __capi;
	287
df5f8314	288	seq_printf(m, "%s", header);
e338d263	289	CAP_FOR_EACH_U32(__capi) {
df5f8314	290	seq_printf(m, "%08x",
ca05a99a	291	a->cap[(_KERNEL_CAPABILITY_U32S-1) - __capi]);
e338d263	292	}
df5f8314	293	seq_printf(m, "\n");
e338d263 AM	294	}
e338d263 AM	295
df5f8314	296	static inline void task_cap(struct seq_file m, struct task_struct p)
1da177e4	297	{
c69e8d9c DH	298	const struct cred *cred;
c69e8d9c DH	299	kernel_cap_t cap_inheritable, cap_permitted, cap_effective, cap_bset;
b6dff3ec	300
c69e8d9c DH	301	rcu_read_lock();
	302	cred = __task_cred(p);
	303	cap_inheritable = cred->cap_inheritable;
	304	cap_permitted = cred->cap_permitted;
	305	cap_effective = cred->cap_effective;
	306	cap_bset = cred->cap_bset;
	307	rcu_read_unlock();
	308
	309	render_cap_t(m, "CapInh:\t", &cap_inheritable);
	310	render_cap_t(m, "CapPrm:\t", &cap_permitted);
	311	render_cap_t(m, "CapEff:\t", &cap_effective);
	312	render_cap_t(m, "CapBnd:\t", &cap_bset);
1da177e4 LT	313	}
1da177e4 LT	314
df5f8314 EB	315	static inline void task_context_switch_counts(struct seq_file *m,
df5f8314 EB	316	struct task_struct *p)
b663a79c	317	{
df5f8314 EB	318	seq_printf(m, "voluntary_ctxt_switches:\t%lu\n"
	319	"nonvoluntary_ctxt_switches:\t%lu\n",
	320	p->nvcsw,
	321	p->nivcsw);
b663a79c MU	322	}
b663a79c MU	323
df5f8314 EB	324	int proc_pid_status(struct seq_file m, struct pid_namespace ns,
df5f8314 EB	325	struct pid pid, struct task_struct task)
1da177e4	326	{
1da177e4 LT	327	struct mm_struct *mm = get_task_mm(task);
1da177e4 LT	328
df5f8314 EB	329	task_name(m, task);
df5f8314 EB	330	task_state(m, ns, pid, task);
8ea02606	331
1da177e4	332	if (mm) {
df5f8314	333	task_mem(m, mm);
1da177e4 LT	334	mmput(mm);
1da177e4 LT	335	}
df5f8314 EB	336	task_sig(m, task);
	337	task_cap(m, task);
	338	cpuset_task_status_allowed(m, task);
347a8dc3	339	#if defined(CONFIG_S390)
df5f8314	340	task_show_regs(m, task);
1da177e4	341	#endif
df5f8314 EB	342	task_context_switch_counts(m, task);
df5f8314 EB	343	return 0;
1da177e4 LT	344	}
1da177e4 LT	345
ee992744 EB	346	static int do_task_stat(struct seq_file m, struct pid_namespace ns,
ee992744 EB	347	struct pid pid, struct task_struct task, int whole)
1da177e4 LT	348	{
	349	unsigned long vsize, eip, esp, wchan = ~0UL;
	350	long priority, nice;
	351	int tty_pgrp = -1, tty_nr = 0;
	352	sigset_t sigign, sigcatch;
	353	char state;
8ea02606	354	pid_t ppid = 0, pgid = -1, sid = -1;
1da177e4	355	int num_threads = 0;
f83ce3e6	356	int permitted;
1da177e4 LT	357	struct mm_struct *mm;
	358	unsigned long long start_time;
	359	unsigned long cmin_flt = 0, cmaj_flt = 0;
	360	unsigned long min_flt = 0, maj_flt = 0;
efe567fc	361	cputime_t cutime, cstime, utime, stime;
9ac52315	362	cputime_t cgtime, gtime;
1da177e4	363	unsigned long rsslim = 0;
1da177e4	364	char tcomm[sizeof(task->comm)];
a593d6ed	365	unsigned long flags;
1da177e4 LT	366
	367	state = *get_task_state(task);
	368	vsize = eip = esp = 0;
f83ce3e6	369	permitted = ptrace_may_access(task, PTRACE_MODE_READ);
1da177e4 LT	370	mm = get_task_mm(task);
	371	if (mm) {
	372	vsize = task_vsize(mm);
f83ce3e6 JE	373	if (permitted) {
	374	eip = KSTK_EIP(task);
	375	esp = KSTK_ESP(task);
	376	}
1da177e4 LT	377	}
	378
	379	get_task_comm(tcomm, task);
	380
	381	sigemptyset(&sigign);
	382	sigemptyset(&sigcatch);
efe567fc	383	cutime = cstime = utime = stime = cputime_zero;
9ac52315	384	cgtime = gtime = cputime_zero;
3cfd0885	385
a593d6ed ON	386	if (lock_task_sighand(task, &flags)) {
a593d6ed ON	387	struct signal_struct *sig = task->signal;
91593504 ON	388
91593504 ON	389	if (sig->tty) {
5d0fdf1e AC	390	struct pid *pgrp = tty_get_pgrp(sig->tty);
	391	tty_pgrp = pid_nr_ns(pgrp, ns);
	392	put_pid(pgrp);
91593504	393	tty_nr = new_encode_dev(tty_devnum(sig->tty));
a593d6ed ON	394	}
	395
	396	num_threads = atomic_read(&sig->count);
1da177e4 LT	397	collect_sigign_sigcatch(task, &sigign, &sigcatch);
1da177e4 LT	398
a593d6ed ON	399	cmin_flt = sig->cmin_flt;
	400	cmaj_flt = sig->cmaj_flt;
	401	cutime = sig->cutime;
	402	cstime = sig->cstime;
9ac52315	403	cgtime = sig->cgtime;
a593d6ed ON	404	rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;
a593d6ed ON	405
1da177e4 LT	406	/* add up live thread stats at the group level */
1da177e4 LT	407	if (whole) {
f06febc9	408	struct task_cputime cputime;
a593d6ed	409	struct task_struct *t = task;
1da177e4 LT	410	do {
	411	min_flt += t->min_flt;
	412	maj_flt += t->maj_flt;
9ac52315	413	gtime = cputime_add(gtime, task_gtime(t));
1da177e4 LT	414	t = next_thread(t);
1da177e4 LT	415	} while (t != task);
1da177e4	416
a593d6ed ON	417	min_flt += sig->min_flt;
a593d6ed ON	418	maj_flt += sig->maj_flt;
f06febc9 FM	419	thread_group_cputime(task, &cputime);
	420	utime = cputime.utime;
	421	stime = cputime.stime;
f9e26291	422	gtime = cputime_add(gtime, sig->gtime);
1da177e4	423	}
a593d6ed	424
b488893a	425	sid = task_session_nr_ns(task, ns);
a98fdcef	426	ppid = task_tgid_nr_ns(task->real_parent, ns);
b488893a	427	pgid = task_pgrp_nr_ns(task, ns);
a593d6ed ON	428
a593d6ed ON	429	unlock_task_sighand(task, &flags);
1da177e4	430	}
1da177e4	431
f83ce3e6	432	if (permitted && (!whole \|\| num_threads < 2))
1da177e4 LT	433	wchan = get_wchan(task);
	434	if (!whole) {
	435	min_flt = task->min_flt;
	436	maj_flt = task->maj_flt;
b27f03d4 IM	437	utime = task_utime(task);
b27f03d4 IM	438	stime = task_stime(task);
9ac52315	439	gtime = task_gtime(task);
1da177e4 LT	440	}
	441
	442	/* scale priority and nice values from timeslices to -20..20 */
	443	/* to make it look like a "normal" Unix priority/nice value */
	444	priority = task_prio(task);
	445	nice = task_nice(task);
	446
	447	/* Temporary variable needed for gcc-2.96 */
	448	/* convert timespec -> nsec*/
924b42d5 TJ	449	start_time =
	450	(unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC
	451	+ task->real_start_time.tv_nsec;
1da177e4 LT	452	/* convert nsec -> ticks */
	453	start_time = nsec_to_clock_t(start_time);
	454
ee992744	455	seq_printf(m, "%d (%s) %c %d %d %d %d %d %u %lu \
4dee26b7	456	%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
9ac52315	457	%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n",
ee992744	458	pid_nr_ns(pid, ns),
1da177e4 LT	459	tcomm,
	460	state,
	461	ppid,
	462	pgid,
	463	sid,
	464	tty_nr,
	465	tty_pgrp,
	466	task->flags,
	467	min_flt,
	468	cmin_flt,
	469	maj_flt,
	470	cmaj_flt,
efe567fc CB	471	cputime_to_clock_t(utime),
efe567fc CB	472	cputime_to_clock_t(stime),
1da177e4 LT	473	cputime_to_clock_t(cutime),
	474	cputime_to_clock_t(cstime),
	475	priority,
	476	nice,
	477	num_threads,
1da177e4 LT	478	start_time,
1da177e4 LT	479	vsize,
4294621f	480	mm ? get_mm_rss(mm) : 0,
8ea02606	481	rsslim,
1da177e4 LT	482	mm ? mm->start_code : 0,
1da177e4 LT	483	mm ? mm->end_code : 0,
f83ce3e6	484	(permitted && mm) ? mm->start_stack : 0,
1da177e4 LT	485	esp,
	486	eip,
	487	/* The signal information here is obsolete.
	488	* It must be decimal for Linux 2.0 compatibility.
	489	* Use /proc/#/status for real-time signals.
	490	*/
	491	task->pending.signal.sig[0] & 0x7fffffffUL,
	492	task->blocked.sig[0] & 0x7fffffffUL,
	493	sigign .sig[0] & 0x7fffffffUL,
	494	sigcatch .sig[0] & 0x7fffffffUL,
	495	wchan,
	496	0UL,
	497	0UL,
	498	task->exit_signal,
	499	task_cpu(task),
	500	task->rt_priority,
25890454	501	task->policy,
9ac52315 LV	502	(unsigned long long)delayacct_blkio_ticks(task),
	503	cputime_to_clock_t(gtime),
	504	cputime_to_clock_t(cgtime));
8ea02606	505	if (mm)
1da177e4	506	mmput(mm);
ee992744	507	return 0;
1da177e4 LT	508	}
1da177e4 LT	509
ee992744 EB	510	int proc_tid_stat(struct seq_file m, struct pid_namespace ns,
ee992744 EB	511	struct pid pid, struct task_struct task)
1da177e4	512	{
ee992744	513	return do_task_stat(m, ns, pid, task, 0);
1da177e4 LT	514	}
1da177e4 LT	515
ee992744 EB	516	int proc_tgid_stat(struct seq_file m, struct pid_namespace ns,
ee992744 EB	517	struct pid pid, struct task_struct task)
1da177e4	518	{
ee992744	519	return do_task_stat(m, ns, pid, task, 1);
1da177e4 LT	520	}
1da177e4 LT	521
a56d3fc7 EB	522	int proc_pid_statm(struct seq_file m, struct pid_namespace ns,
a56d3fc7 EB	523	struct pid pid, struct task_struct task)
1da177e4 LT	524	{
	525	int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
	526	struct mm_struct *mm = get_task_mm(task);
8ea02606	527
1da177e4 LT	528	if (mm) {
	529	size = task_statm(mm, &shared, &text, &data, &resident);
	530	mmput(mm);
	531	}
a56d3fc7 EB	532	seq_printf(m, "%d %d %d %d %d %d %d\n",
a56d3fc7 EB	533	size, resident, shared, text, lib, data, 0);
1da177e4	534
a56d3fc7	535	return 0;
1da177e4	536	}