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/*
* 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/sched.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/pagemap.h>
#include <linux/swap.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/signal.h>
#include <linux/highmem.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/processor.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;
ADDBUF(buf, "Name:\t");
name = p->comm;
i = sizeof(p->comm);
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 */
"Z (zombie)", /* 4 */
"T (stopped)", /* 8 */
"W (paging)" /* 16 */
};
static inline const char * get_task_state(struct task_struct *tsk)
{
unsigned int state = tsk->state & (TASK_RUNNING |
TASK_INTERRUPTIBLE |
TASK_UNINTERRUPTIBLE |
TASK_ZOMBIE |
TASK_STOPPED);
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)
{
int g;
read_lock(&tasklist_lock);
buffer += sprintf(buffer,
"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), p->tgid,
p->pid, p->pid ? p->p_opptr->pid : 0, 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);
task_unlock(p);
for (g = 0; g < p->ngroups; g++)
buffer += sprintf(buffer, "%d ", p->groups[g]);
buffer += sprintf(buffer, "\n");
return buffer;
}
static inline char * task_mem(struct mm_struct *mm, char *buffer)
{
struct vm_area_struct * vma;
unsigned long data = 0, stack = 0;
unsigned long exec = 0, lib = 0;
down_read(&mm->mmap_sem);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
unsigned long len = (vma->vm_end - vma->vm_start) >> 10;
if (!vma->vm_file) {
data += len;
if (vma->vm_flags & VM_GROWSDOWN)
stack += len;
continue;
}
if (vma->vm_flags & VM_WRITE)
continue;
if (vma->vm_flags & VM_EXEC) {
exec += len;
if (vma->vm_flags & VM_EXECUTABLE)
continue;
lib += len;
}
}
buffer += sprintf(buffer,
"VmSize:\t%8lu kB\n"
"VmLck:\t%8lu kB\n"
"VmRSS:\t%8lu kB\n"
"VmData:\t%8lu kB\n"
"VmStk:\t%8lu kB\n"
"VmExe:\t%8lu kB\n"
"VmLib:\t%8lu kB\n",
mm->total_vm << (PAGE_SHIFT-10),
mm->locked_vm << (PAGE_SHIFT-10),
mm->rss << (PAGE_SHIFT-10),
data - stack, stack,
exec - lib, lib);
up_read(&mm->mmap_sem);
return buffer;
}
static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
sigset_t *catch)
{
struct k_sigaction *k;
int i;
sigemptyset(ign);
sigemptyset(catch);
if (p->sig) {
k = p->sig->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 ign, catch;
buffer += sprintf(buffer, "SigPnd:\t");
buffer = render_sigset_t(&p->pending.signal, buffer);
*buffer++ = '\n';
buffer += sprintf(buffer, "SigBlk:\t");
buffer = render_sigset_t(&p->blocked, buffer);
*buffer++ = '\n';
collect_sigign_sigcatch(p, &ign, &catch);
buffer += sprintf(buffer, "SigIgn:\t");
buffer = render_sigset_t(&ign, buffer);
*buffer++ = '\n';
buffer += sprintf(buffer, "SigCgt:\t"); /* Linux 2.0 uses "SigCgt" */
buffer = render_sigset_t(&catch, buffer);
*buffer++ = '\n';
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;
buffer = task_name(task, buffer);
buffer = task_state(task, buffer);
task_lock(task);
mm = task->mm;
if(mm)
atomic_inc(&mm->mm_users);
task_unlock(task);
if (mm) {
buffer = task_mem(mm, buffer);
mmput(mm);
}
buffer = task_sig(task, buffer);
buffer = task_cap(task, buffer);
#if defined(CONFIG_ARCH_S390)
buffer = task_show_regs(task, buffer);
#endif
return buffer - orig;
}
int proc_pid_stat(struct task_struct *task, char * buffer)
{
unsigned long vsize, eip, esp, wchan;
long priority, nice;
int tty_pgrp = -1, tty_nr = 0;
sigset_t sigign, sigcatch;
char state;
int res;
pid_t ppid;
struct mm_struct *mm;
state = *get_task_state(task);
vsize = eip = esp = 0;
task_lock(task);
mm = task->mm;
if(mm)
atomic_inc(&mm->mm_users);
if (task->tty) {
tty_pgrp = task->tty->pgrp;
tty_nr = kdev_t_to_nr(task->tty->device);
}
task_unlock(task);
if (mm) {
struct vm_area_struct *vma;
down_read(&mm->mmap_sem);
vma = mm->mmap;
while (vma) {
vsize += vma->vm_end - vma->vm_start;
vma = vma->vm_next;
}
eip = KSTK_EIP(task);
esp = KSTK_ESP(task);
up_read(&mm->mmap_sem);
}
wchan = get_wchan(task);
collect_sigign_sigcatch(task, &sigign, &sigcatch);
/* scale priority and nice values from timeslices to -20..20 */
/* to make it look like a "normal" Unix priority/nice value */
priority = task->counter;
priority = 20 - (priority * 10 + DEF_COUNTER / 2) / DEF_COUNTER;
nice = task->nice;
read_lock(&tasklist_lock);
ppid = task->pid ? task->p_opptr->pid : 0;
read_unlock(&tasklist_lock);
res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
%lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld %lu %lu %ld %lu %lu %lu %lu %lu \
%lu %lu %lu %lu %lu %lu %lu %lu %d %d\n",
task->pid,
task->comm,
state,
ppid,
task->pgrp,
task->session,
tty_nr,
tty_pgrp,
task->flags,
task->min_flt,
task->cmin_flt,
task->maj_flt,
task->cmaj_flt,
task->times.tms_utime,
task->times.tms_stime,
task->times.tms_cutime,
task->times.tms_cstime,
priority,
nice,
0UL /* removed */,
task->it_real_value,
task->start_time,
vsize,
mm ? mm->rss : 0, /* you might want to shift this left 3 */
task->rlim[RLIMIT_RSS].rlim_cur,
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,
task->nswap,
task->cnswap,
task->exit_signal,
task->processor);
if(mm)
mmput(mm);
return res;
}
static inline void statm_pte_range(pmd_t * pmd, unsigned long address, unsigned long size,
int * pages, int * shared, int * dirty, int * total)
{
pte_t * pte;
unsigned long end;
if (pmd_none(*pmd))
return;
if (pmd_bad(*pmd)) {
pmd_ERROR(*pmd);
pmd_clear(pmd);
return;
}
pte = pte_offset(pmd, address);
address &= ~PMD_MASK;
end = address + size;
if (end > PMD_SIZE)
end = PMD_SIZE;
do {
pte_t page = *pte;
struct page *ptpage;
address += PAGE_SIZE;
pte++;
if (pte_none(page))
continue;
++*total;
if (!pte_present(page))
continue;
ptpage = pte_page(page);
if ((!VALID_PAGE(ptpage)) || PageReserved(ptpage))
continue;
++*pages;
if (pte_dirty(page))
++*dirty;
if (page_count(pte_page(page)) > 1)
++*shared;
} while (address < end);
}
static inline void statm_pmd_range(pgd_t * pgd, unsigned long address, unsigned long size,
int * pages, int * shared, int * dirty, int * total)
{
pmd_t * pmd;
unsigned long end;
if (pgd_none(*pgd))
return;
if (pgd_bad(*pgd)) {
pgd_ERROR(*pgd);
pgd_clear(pgd);
return;
}
pmd = pmd_offset(pgd, address);
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
do {
statm_pte_range(pmd, address, end - address, pages, shared, dirty, total);
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address < end);
}
static void statm_pgd_range(pgd_t * pgd, unsigned long address, unsigned long end,
int * pages, int * shared, int * dirty, int * total)
{
while (address < end) {
statm_pmd_range(pgd, address, end - address, pages, shared, dirty, total);
address = (address + PGDIR_SIZE) & PGDIR_MASK;
pgd++;
}
}
int proc_pid_statm(struct task_struct *task, char * buffer)
{
struct mm_struct *mm;
int size=0, resident=0, share=0, trs=0, lrs=0, drs=0, dt=0;
task_lock(task);
mm = task->mm;
if(mm)
atomic_inc(&mm->mm_users);
task_unlock(task);
if (mm) {
struct vm_area_struct * vma;
down_read(&mm->mmap_sem);
vma = mm->mmap;
while (vma) {
pgd_t *pgd = pgd_offset(mm, vma->vm_start);
int pages = 0, shared = 0, dirty = 0, total = 0;
statm_pgd_range(pgd, vma->vm_start, vma->vm_end, &pages, &shared, &dirty, &total);
resident += pages;
share += shared;
dt += dirty;
size += total;
if (vma->vm_flags & VM_EXECUTABLE)
trs += pages; /* text */
else if (vma->vm_flags & VM_GROWSDOWN)
drs += pages; /* stack */
else if (vma->vm_end > 0x60000000)
lrs += pages; /* library */
else
drs += pages;
vma = vma->vm_next;
}
up_read(&mm->mmap_sem);
mmput(mm);
}
return sprintf(buffer,"%d %d %d %d %d %d %d\n",
size, resident, share, trs, lrs, drs, dt);
}
/*
* The way we support synthetic files > 4K
* - without storing their contents in some buffer and
* - without walking through the entire synthetic file until we reach the
* position of the requested data
* is to cleverly encode the current position in the file's f_pos field.
* There is no requirement that a read() call which returns `count' bytes
* of data increases f_pos by exactly `count'.
*
* This idea is Linus' one. Bruno implemented it.
*/
/*
* For the /proc/<pid>/maps file, we use fixed length records, each containing
* a single line.
*
* f_pos = (number of the vma in the task->mm->mmap list) * PAGE_SIZE
* + (index into the line)
*/
/* for systems with sizeof(void*) == 4: */
#define MAPS_LINE_FORMAT4 "%08lx-%08lx %s %08lx %s %lu"
#define MAPS_LINE_MAX4 49 /* sum of 8 1 8 1 4 1 8 1 5 1 10 1 */
/* for systems with sizeof(void*) == 8: */
#define MAPS_LINE_FORMAT8 "%016lx-%016lx %s %016lx %s %lu"
#define MAPS_LINE_MAX8 73 /* sum of 16 1 16 1 4 1 16 1 5 1 10 1 */
#define MAPS_LINE_FORMAT (sizeof(void*) == 4 ? MAPS_LINE_FORMAT4 : MAPS_LINE_FORMAT8)
#define MAPS_LINE_MAX (sizeof(void*) == 4 ? MAPS_LINE_MAX4 : MAPS_LINE_MAX8)
static int proc_pid_maps_get_line (char *buf, struct vm_area_struct *map)
{
/* produce the next line */
char *line;
char str[5];
int flags;
kdev_t dev;
unsigned long ino;
int len;
flags = map->vm_flags;
str[0] = flags & VM_READ ? 'r' : '-';
str[1] = flags & VM_WRITE ? 'w' : '-';
str[2] = flags & VM_EXEC ? 'x' : '-';
str[3] = flags & VM_MAYSHARE ? 's' : 'p';
str[4] = 0;
dev = 0;
ino = 0;
if (map->vm_file != NULL) {
dev = map->vm_file->f_dentry->d_inode->i_dev;
ino = map->vm_file->f_dentry->d_inode->i_ino;
line = d_path(map->vm_file->f_dentry,
map->vm_file->f_vfsmnt,
buf, PAGE_SIZE);
buf[PAGE_SIZE-1] = '\n';
line -= MAPS_LINE_MAX;
if(line < buf)
line = buf;
} else
line = buf;
len = sprintf(line,
MAPS_LINE_FORMAT,
map->vm_start, map->vm_end, str, map->vm_pgoff << PAGE_SHIFT,
kdevname(dev), ino);
if(map->vm_file) {
int i;
for(i = len; i < MAPS_LINE_MAX; i++)
line[i] = ' ';
len = buf + PAGE_SIZE - line;
memmove(buf, line, len);
} else
line[len++] = '\n';
return len;
}
ssize_t proc_pid_read_maps (struct task_struct *task, struct file * file, char * buf,
size_t count, loff_t *ppos)
{
struct mm_struct *mm;
struct vm_area_struct * map;
char *tmp, *kbuf;
long retval;
int off, lineno, loff;
/* reject calls with out of range parameters immediately */
retval = 0;
if (*ppos > LONG_MAX)
goto out;
if (count == 0)
goto out;
off = (long)*ppos;
/*
* We might sleep getting the page, so get it first.
*/
retval = -ENOMEM;
kbuf = (char*)__get_free_page(GFP_KERNEL);
if (!kbuf)
goto out;
tmp = (char*)__get_free_page(GFP_KERNEL);
if (!tmp)
goto out_free1;
task_lock(task);
mm = task->mm;
if (mm)
atomic_inc(&mm->mm_users);
task_unlock(task);
retval = 0;
if (!mm)
goto out_free2;
down_read(&mm->mmap_sem);
map = mm->mmap;
lineno = 0;
loff = 0;
if (count > PAGE_SIZE)
count = PAGE_SIZE;
while (map) {
int len;
if (off > PAGE_SIZE) {
off -= PAGE_SIZE;
goto next;
}
len = proc_pid_maps_get_line(tmp, map);
len -= off;
if (len > 0) {
if (retval+len > count) {
/* only partial line transfer possible */
len = count - retval;
/* save the offset where the next read
* must start */
loff = len+off;
}
memcpy(kbuf+retval, tmp+off, len);
retval += len;
}
off = 0;
next:
if (!loff)
lineno++;
if (retval >= count)
break;
if (loff) BUG();
map = map->vm_next;
}
up_read(&mm->mmap_sem);
mmput(mm);
if (retval > count) BUG();
if (copy_to_user(buf, kbuf, retval))
retval = -EFAULT;
else
*ppos = (lineno << PAGE_SHIFT) + loff;
out_free2:
free_page((unsigned long)tmp);
out_free1:
free_page((unsigned long)kbuf);
out:
return retval;
}
#ifdef CONFIG_SMP
int proc_pid_cpu(struct task_struct *task, char * buffer)
{
int i, len;
len = sprintf(buffer,
"cpu %lu %lu\n",
task->times.tms_utime,
task->times.tms_stime);
for (i = 0 ; i < smp_num_cpus; i++)
len += sprintf(buffer + len, "cpu%d %lu %lu\n",
i,
task->per_cpu_utime[cpu_logical_map(i)],
task->per_cpu_stime[cpu_logical_map(i)]);
return len;
}
#endif
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