/* *  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@lxorguk.ukuu.org.uk> * * 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/uaccess.h>#include <linux/io.h>#include <linux/mm.h>#include <linux/hugetlb.h>#include <linux/pagemap.h>#include <linux/swap.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 <linux/string_helpers.h>#include <linux/user_namespace.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){	char *buf;	char tcomm[sizeof(p->comm)]; 	get_task_comm(tcomm, p); 	seq_puts(m, "Name:\t");	buf = m->buf + m->count; 	/* Ignore error for now */	buf += string_escape_str(tcomm, buf, m->size - m->count,				 ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\"); 	m->count = buf - m->buf;	seq_putc(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 * const task_state_array[] = {	"R (running)",		/*   0 */	"S (sleeping)",		/*   1 */	"D (disk sleep)",	/*   2 */	"T (stopped)",		/*   4 */	"t (tracing stop)",	/*   8 */	"X (dead)",		/*  16 */	"Z (zombie)",		/*  32 */}; static inline const char *get_task_state(struct task_struct *tsk){	unsigned int state = (tsk->state | tsk->exit_state) & TASK_REPORT; 	BUILD_BUG_ON(1 + ilog2(TASK_REPORT) != ARRAY_SIZE(task_state_array)-1); 	return task_state_array[fls(state)];} static inline void task_state(struct seq_file *m, struct pid_namespace *ns,				struct pid *pid, struct task_struct *p){	struct user_namespace *user_ns = seq_user_ns(m);	struct group_info *group_info;	int g;	struct task_struct *tracer;	const struct cred *cred;	pid_t ppid, tpid = 0, tgid, ngid;	unsigned int max_fds = 0; 	rcu_read_lock();	ppid = pid_alive(p) ?		task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0; 	tracer = ptrace_parent(p);	if (tracer)		tpid = task_pid_nr_ns(tracer, ns); 	tgid = task_tgid_nr_ns(p, ns);	ngid = task_numa_group_id(p);	cred = get_task_cred(p); 	task_lock(p);	if (p->files)		max_fds = files_fdtable(p->files)->max_fds;	task_unlock(p);	rcu_read_unlock(); 	seq_printf(m,		"State:\t%s\n"		"Tgid:\t%d\n"		"Ngid:\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"		"FDSize:\t%d\nGroups:\t",		get_task_state(p),		tgid, ngid, pid_nr_ns(pid, ns), ppid, tpid,		from_kuid_munged(user_ns, cred->uid),		from_kuid_munged(user_ns, cred->euid),		from_kuid_munged(user_ns, cred->suid),		from_kuid_munged(user_ns, cred->fsuid),		from_kgid_munged(user_ns, cred->gid),		from_kgid_munged(user_ns, cred->egid),		from_kgid_munged(user_ns, cred->sgid),		from_kgid_munged(user_ns, cred->fsgid),		max_fds); 	group_info = cred->group_info;	for (g = 0; g < group_info->ngroups; g++)		seq_printf(m, "%d ",			   from_kgid_munged(user_ns, GROUP_AT(group_info, g)));	put_cred(cred); #ifdef CONFIG_PID_NS	seq_puts(m, "\nNStgid:");	for (g = ns->level; g <= pid->level; g++)		seq_printf(m, "\t%d",			task_tgid_nr_ns(p, pid->numbers[g].ns));	seq_puts(m, "\nNSpid:");	for (g = ns->level; g <= pid->level; g++)		seq_printf(m, "\t%d",			task_pid_nr_ns(p, pid->numbers[g].ns));	seq_puts(m, "\nNSpgid:");	for (g = ns->level; g <= pid->level; g++)		seq_printf(m, "\t%d",			task_pgrp_nr_ns(p, pid->numbers[g].ns));	seq_puts(m, "\nNSsid:");	for (g = ns->level; g <= pid->level; g++)		seq_printf(m, "\t%d",			task_session_nr_ns(p, pid->numbers[g].ns));#endif	seq_putc(m, '\n');} void render_sigset_t(struct seq_file *m, const char *header,				sigset_t *set){	int i; 	seq_puts(m, 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_putc(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 = get_nr_threads(p);		rcu_read_lock();  /* FIXME: is this correct? */		qsize = atomic_read(&__task_cred(p)->user->sigpending);		rcu_read_unlock();		qlim = task_rlimit(p, RLIMIT_SIGPENDING);		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_puts(m, header);	CAP_FOR_EACH_U32(__capi) {		seq_printf(m, "%08x",			   a->cap[CAP_LAST_U32 - __capi]);	}	seq_putc(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_seccomp(struct seq_file *m, struct task_struct *p){#ifdef CONFIG_SECCOMP	seq_printf(m, "Seccomp:\t%d\n", p->seccomp.mode);#endif} 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);} static void task_cpus_allowed(struct seq_file *m, struct task_struct *task){	seq_printf(m, "Cpus_allowed:\t%*pb\n",		   cpumask_pr_args(&task->cpus_allowed));	seq_printf(m, "Cpus_allowed_list:\t%*pbl\n",		   cpumask_pr_args(&task->cpus_allowed));} 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);	task_seccomp(m, task);	task_cpus_allowed(m, task);	cpuset_task_status_allowed(m, task);	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;	int 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 | PTRACE_MODE_NOAUDIT);	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 = 0;	cgtime = gtime = 0; 	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 = get_nr_threads(task);		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 = ACCESS_ONCE(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;				gtime += task_gtime(t);			} while_each_thread(task, t); 			min_flt += sig->min_flt;			maj_flt += sig->maj_flt;			thread_group_cputime_adjusted(task, &utime, &stime);			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;		task_cputime_adjusted(task, &utime, &stime);		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); 	/* convert nsec -> ticks */	start_time = nsec_to_clock_t(task->real_start_time); 	seq_printf(m, "%d (%s) %c", pid_nr_ns(pid, ns), tcomm, state);	seq_put_decimal_ll(m, ' ', ppid);	seq_put_decimal_ll(m, ' ', pgid);	seq_put_decimal_ll(m, ' ', sid);	seq_put_decimal_ll(m, ' ', tty_nr);	seq_put_decimal_ll(m, ' ', tty_pgrp);	seq_put_decimal_ull(m, ' ', task->flags);	seq_put_decimal_ull(m, ' ', min_flt);	seq_put_decimal_ull(m, ' ', cmin_flt);	seq_put_decimal_ull(m, ' ', maj_flt);	seq_put_decimal_ull(m, ' ', cmaj_flt);	seq_put_decimal_ull(m, ' ', cputime_to_clock_t(utime));	seq_put_decimal_ull(m, ' ', cputime_to_clock_t(stime));	seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cutime));	seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cstime));	seq_put_decimal_ll(m, ' ', priority);	seq_put_decimal_ll(m, ' ', nice);	seq_put_decimal_ll(m, ' ', num_threads);	seq_put_decimal_ull(m, ' ', 0);	seq_put_decimal_ull(m, ' ', start_time);	seq_put_decimal_ull(m, ' ', vsize);	seq_put_decimal_ull(m, ' ', mm ? get_mm_rss(mm) : 0);	seq_put_decimal_ull(m, ' ', rsslim);	seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->start_code : 1) : 0);	seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->end_code : 1) : 0);	seq_put_decimal_ull(m, ' ', (permitted && mm) ? mm->start_stack : 0);	seq_put_decimal_ull(m, ' ', esp);	seq_put_decimal_ull(m, ' ', eip);	/* The signal information here is obsolete.	 * It must be decimal for Linux 2.0 compatibility.	 * Use /proc/#/status for real-time signals.	 */	seq_put_decimal_ull(m, ' ', task->pending.signal.sig[0] & 0x7fffffffUL);	seq_put_decimal_ull(m, ' ', task->blocked.sig[0] & 0x7fffffffUL);	seq_put_decimal_ull(m, ' ', sigign.sig[0] & 0x7fffffffUL);	seq_put_decimal_ull(m, ' ', sigcatch.sig[0] & 0x7fffffffUL);	seq_put_decimal_ull(m, ' ', wchan);	seq_put_decimal_ull(m, ' ', 0);

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