/* *  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/config.h>#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 <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; 	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);	buffer += sprintf(buffer,		"FDSize:\t%d\n"		"Groups:\t",		p->files ? p->files->max_fds : 0); 	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){	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); 	/* Gather all the data with the appropriate locks held */	read_lock(&tasklist_lock);	if (p->sighand) {		spin_lock_irq(&p->sighand->siglock);		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;		spin_unlock_irq(&p->sighand->siglock);	}	read_unlock(&tasklist_lock); 	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_ARCH_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, 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;	unsigned long it_real_value = 0;	struct task_struct *t;	char tcomm[sizeof(task->comm)]; 	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;	read_lock(&tasklist_lock);	if (task->sighand) {		spin_lock_irq(&task->sighand->siglock);		num_threads = atomic_read(&task->signal->count);		collect_sigign_sigcatch(task, &sigign, &sigcatch); 		/* add up live thread stats at the group level */		if (whole) {			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);		} 		spin_unlock_irq(&task->sighand->siglock);	}	if (task->signal) {		if (task->signal->tty) {			tty_pgrp = task->signal->tty->pgrp;			tty_nr = new_encode_dev(tty_devnum(task->signal->tty));		}		pgid = process_group(task);		sid = task->signal->session;		cmin_flt = task->signal->cmin_flt;		cmaj_flt = task->signal->cmaj_flt;		cutime = task->signal->cutime;		cstime = task->signal->cstime;		rsslim = task->signal->rlim[RLIMIT_RSS].rlim_cur;		if (whole) {			min_flt += task->signal->min_flt;			maj_flt += task->signal->maj_flt;			utime = cputime_add(utime, task->signal->utime);			stime = cputime_add(stime, task->signal->stime);		}		it_real_value = task->signal->it_real_value;	}	ppid = pid_alive(task) ? task->group_leader->real_parent->tgid : 0;	read_unlock(&tasklist_lock); 	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 %ld %llu %lu %ld %lu %lu %lu %lu %lu \%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\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,		jiffies_to_clock_t(it_real_value),		start_time,		vsize,		mm ? get_mm_counter(mm, rss) : 0, /* you might want to shift this left 3 */	        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);	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);}