579 lines
14 KiB
C
579 lines
14 KiB
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/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/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 <asm/pgtable.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 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;
|
|
pid_t ppid, tpid;
|
|
|
|
rcu_read_lock();
|
|
ppid = pid_alive(p) ?
|
|
task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
|
|
tpid = pid_alive(p) && p->ptrace ?
|
|
task_pid_nr_ns(rcu_dereference(p->parent), ns) : 0;
|
|
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,
|
|
p->uid, p->euid, p->suid, p->fsuid,
|
|
p->gid, p->egid, p->sgid, p->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 = p->group_info;
|
|
get_group_info(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_group_info(group_info);
|
|
|
|
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);
|
|
|
|
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();
|
|
|
|
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[(_LINUX_CAPABILITY_U32S-1) - __capi]);
|
|
}
|
|
seq_printf(m, "\n");
|
|
}
|
|
|
|
static inline void task_cap(struct seq_file *m, struct task_struct *p)
|
|
{
|
|
render_cap_t(m, "CapInh:\t", &p->cap_inheritable);
|
|
render_cap_t(m, "CapPrm:\t", &p->cap_permitted);
|
|
render_cap_t(m, "CapEff:\t", &p->cap_effective);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Use precise platform statistics if available:
|
|
*/
|
|
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
|
|
static cputime_t task_utime(struct task_struct *p)
|
|
{
|
|
return p->utime;
|
|
}
|
|
|
|
static cputime_t task_stime(struct task_struct *p)
|
|
{
|
|
return p->stime;
|
|
}
|
|
#else
|
|
static cputime_t task_utime(struct task_struct *p)
|
|
{
|
|
clock_t utime = cputime_to_clock_t(p->utime),
|
|
total = utime + cputime_to_clock_t(p->stime);
|
|
u64 temp;
|
|
|
|
/*
|
|
* Use CFS's precise accounting:
|
|
*/
|
|
temp = (u64)nsec_to_clock_t(p->se.sum_exec_runtime);
|
|
|
|
if (total) {
|
|
temp *= utime;
|
|
do_div(temp, total);
|
|
}
|
|
utime = (clock_t)temp;
|
|
|
|
p->prev_utime = max(p->prev_utime, clock_t_to_cputime(utime));
|
|
return p->prev_utime;
|
|
}
|
|
|
|
static cputime_t task_stime(struct task_struct *p)
|
|
{
|
|
clock_t stime;
|
|
|
|
/*
|
|
* Use CFS's precise accounting. (we subtract utime from
|
|
* the total, to make sure the total observed by userspace
|
|
* grows monotonically - apps rely on that):
|
|
*/
|
|
stime = nsec_to_clock_t(p->se.sum_exec_runtime) -
|
|
cputime_to_clock_t(task_utime(p));
|
|
|
|
if (stime >= 0)
|
|
p->prev_stime = max(p->prev_stime, clock_t_to_cputime(stime));
|
|
|
|
return p->prev_stime;
|
|
}
|
|
#endif
|
|
|
|
static cputime_t task_gtime(struct task_struct *p)
|
|
{
|
|
return p->gtime;
|
|
}
|
|
|
|
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;
|
|
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;
|
|
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;
|
|
cgtime = gtime = cputime_zero;
|
|
|
|
rcu_read_lock();
|
|
if (lock_task_sighand(task, &flags)) {
|
|
struct signal_struct *sig = task->signal;
|
|
|
|
if (sig->tty) {
|
|
tty_pgrp = pid_nr_ns(sig->tty->pgrp, ns);
|
|
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_struct *t = task;
|
|
do {
|
|
min_flt += t->min_flt;
|
|
maj_flt += t->maj_flt;
|
|
utime = cputime_add(utime, task_utime(t));
|
|
stime = cputime_add(stime, task_stime(t));
|
|
gtime = cputime_add(gtime, task_gtime(t));
|
|
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);
|
|
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);
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
if (!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,
|
|
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;
|
|
}
|