2 * linux/fs/proc/array.c
4 * Copyright (C) 1992 by Linus Torvalds
5 * based on ideas by Darren Senn
8 * Michael. K. Johnson: stat,statm extensions.
9 * <johnsonm@stolaf.edu>
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 * <middelin@polyware.iaf.nl>
17 * Danny ter Haar : added cpuinfo
20 * Alessandro Rubini : profile extension.
21 * <rubini@ipvvis.unipv.it>
23 * Jeff Tranter : added BogoMips field to cpuinfo
24 * <Jeff_Tranter@Mitel.COM>
26 * Bruno Haible : remove 4K limit for the maps file
27 * <haible@ma2s2.mathematik.uni-karlsruhe.de>
29 * Yves Arrouye : remove removal of trailing spaces in get_array.
30 * <Yves.Arrouye@marin.fdn.fr>
32 * Jerome Forissier : added per-CPU time information to /proc/stat
33 * and /proc/<pid>/cpu extension
34 * <forissier@isia.cma.fr>
35 * - Incorporation and non-SMP safe operation
36 * of forissier patch in 2.1.78 by
37 * Hans Marcus <crowbar@concepts.nl>
39 * aeb@cwi.nl : /proc/partitions
42 * Alan Cox : security fixes.
43 * <Alan.Cox@linux.org>
45 * Al Viro : safe handling of mm_struct
47 * Gerhard Wichert : added BIGMEM support
48 * Siemens AG <Gerhard.Wichert@pdb.siemens.de>
50 * Al Viro & Jeff Garzik : moved most of the thing into base.c and
51 * : proc_misc.c. The rest may eventually go into
55 #include <linux/config.h>
56 #include <linux/types.h>
57 #include <linux/errno.h>
58 #include <linux/time.h>
59 #include <linux/kernel.h>
60 #include <linux/kernel_stat.h>
61 #include <linux/tty.h>
62 #include <linux/string.h>
63 #include <linux/mman.h>
64 #include <linux/proc_fs.h>
65 #include <linux/ioport.h>
67 #include <linux/hugetlb.h>
68 #include <linux/pagemap.h>
69 #include <linux/swap.h>
70 #include <linux/slab.h>
71 #include <linux/smp.h>
72 #include <linux/signal.h>
73 #include <linux/highmem.h>
74 #include <linux/file.h>
75 #include <linux/times.h>
77 #include <asm/uaccess.h>
78 #include <asm/pgtable.h>
80 #include <asm/processor.h>
82 /* Gcc optimizes away "strlen(x)" for constant x */
83 #define ADDBUF(buffer, string) \
84 do { memcpy(buffer, string, strlen(string)); \
85 buffer += strlen(string); } while (0)
87 static inline char * task_name(struct task_struct
*p
, char * buf
)
92 ADDBUF(buf
, "Name:\t");
96 unsigned char c
= *name
;
120 * The task state array is a strange "bitmap" of
121 * reasons to sleep. Thus "running" is zero, and
122 * you can test for combinations of others with
125 static const char *task_state_array
[] = {
126 "R (running)", /* 0 */
127 "S (sleeping)", /* 1 */
128 "D (disk sleep)", /* 2 */
129 "T (stopped)", /* 4 */
130 "Z (zombie)", /* 8 */
134 static inline const char * get_task_state(struct task_struct
*tsk
)
136 unsigned int state
= tsk
->state
& (TASK_RUNNING
|
138 TASK_UNINTERRUPTIBLE
|
141 const char **p
= &task_state_array
[0];
150 static inline char * task_state(struct task_struct
*p
, char *buffer
)
154 read_lock(&tasklist_lock
);
155 buffer
+= sprintf(buffer
,
162 "Uid:\t%d\t%d\t%d\t%d\n"
163 "Gid:\t%d\t%d\t%d\t%d\n",
165 (p
->sleep_avg
/1024)*100/(1000000000/1024),
167 p
->pid
, p
->pid
? p
->real_parent
->pid
: 0,
168 p
->pid
&& p
->ptrace
? p
->parent
->pid
: 0,
169 p
->uid
, p
->euid
, p
->suid
, p
->fsuid
,
170 p
->gid
, p
->egid
, p
->sgid
, p
->fsgid
);
171 read_unlock(&tasklist_lock
);
173 buffer
+= sprintf(buffer
,
176 p
->files
? p
->files
->max_fds
: 0);
179 get_group_info(p
->group_info
);
180 for (g
= 0; g
< min(p
->group_info
->ngroups
,NGROUPS_SMALL
); g
++)
181 buffer
+= sprintf(buffer
, "%d ", GROUP_AT(p
->group_info
,g
));
182 put_group_info(p
->group_info
);
184 buffer
+= sprintf(buffer
, "\n");
188 static char * render_sigset_t(const char *header
, sigset_t
*set
, char *buffer
)
192 len
= strlen(header
);
193 memcpy(buffer
, header
, len
);
201 if (sigismember(set
, i
+1)) x
|= 1;
202 if (sigismember(set
, i
+2)) x
|= 2;
203 if (sigismember(set
, i
+3)) x
|= 4;
204 if (sigismember(set
, i
+4)) x
|= 8;
205 *buffer
++ = (x
< 10 ? '0' : 'a' - 10) + x
;
213 static void collect_sigign_sigcatch(struct task_struct
*p
, sigset_t
*ign
,
216 struct k_sigaction
*k
;
219 k
= p
->sighand
->action
;
220 for (i
= 1; i
<= _NSIG
; ++i
, ++k
) {
221 if (k
->sa
.sa_handler
== SIG_IGN
)
223 else if (k
->sa
.sa_handler
!= SIG_DFL
)
228 static inline char * task_sig(struct task_struct
*p
, char *buffer
)
230 sigset_t pending
, shpending
, blocked
, ignored
, caught
;
233 sigemptyset(&pending
);
234 sigemptyset(&shpending
);
235 sigemptyset(&blocked
);
236 sigemptyset(&ignored
);
237 sigemptyset(&caught
);
239 /* Gather all the data with the appropriate locks held */
240 read_lock(&tasklist_lock
);
242 spin_lock_irq(&p
->sighand
->siglock
);
243 pending
= p
->pending
.signal
;
244 shpending
= p
->signal
->shared_pending
.signal
;
245 blocked
= p
->blocked
;
246 collect_sigign_sigcatch(p
, &ignored
, &caught
);
247 num_threads
= atomic_read(&p
->signal
->count
);
248 spin_unlock_irq(&p
->sighand
->siglock
);
250 read_unlock(&tasklist_lock
);
252 buffer
+= sprintf(buffer
, "Threads:\t%d\n", num_threads
);
254 /* render them all */
255 buffer
= render_sigset_t("SigPnd:\t", &pending
, buffer
);
256 buffer
= render_sigset_t("ShdPnd:\t", &shpending
, buffer
);
257 buffer
= render_sigset_t("SigBlk:\t", &blocked
, buffer
);
258 buffer
= render_sigset_t("SigIgn:\t", &ignored
, buffer
);
259 buffer
= render_sigset_t("SigCgt:\t", &caught
, buffer
);
264 static inline char *task_cap(struct task_struct
*p
, char *buffer
)
266 return buffer
+ sprintf(buffer
, "CapInh:\t%016x\n"
269 cap_t(p
->cap_inheritable
),
270 cap_t(p
->cap_permitted
),
271 cap_t(p
->cap_effective
));
274 extern char *task_mem(struct mm_struct
*, char *);
275 int proc_pid_status(struct task_struct
*task
, char * buffer
)
277 char * orig
= buffer
;
278 struct mm_struct
*mm
= get_task_mm(task
);
280 buffer
= task_name(task
, buffer
);
281 buffer
= task_state(task
, buffer
);
284 buffer
= task_mem(mm
, buffer
);
287 buffer
= task_sig(task
, buffer
);
288 buffer
= task_cap(task
, buffer
);
289 #if defined(CONFIG_ARCH_S390)
290 buffer
= task_show_regs(task
, buffer
);
292 return buffer
- orig
;
295 extern unsigned long task_vsize(struct mm_struct
*);
296 int proc_pid_stat(struct task_struct
*task
, char * buffer
)
298 unsigned long vsize
, eip
, esp
, wchan
;
300 int tty_pgrp
= -1, tty_nr
= 0;
301 sigset_t sigign
, sigcatch
;
306 struct mm_struct
*mm
;
308 state
= *get_task_state(task
);
309 vsize
= eip
= esp
= 0;
315 tty_pgrp
= task
->tty
->pgrp
;
316 tty_nr
= new_encode_dev(tty_devnum(task
->tty
));
320 down_read(&mm
->mmap_sem
);
321 vsize
= task_vsize(mm
);
322 eip
= KSTK_EIP(task
);
323 esp
= KSTK_ESP(task
);
324 up_read(&mm
->mmap_sem
);
327 wchan
= get_wchan(task
);
329 sigemptyset(&sigign
);
330 sigemptyset(&sigcatch
);
331 read_lock(&tasklist_lock
);
333 spin_lock_irq(&task
->sighand
->siglock
);
334 num_threads
= atomic_read(&task
->signal
->count
);
335 collect_sigign_sigcatch(task
, &sigign
, &sigcatch
);
336 spin_unlock_irq(&task
->sighand
->siglock
);
338 read_unlock(&tasklist_lock
);
340 /* scale priority and nice values from timeslices to -20..20 */
341 /* to make it look like a "normal" Unix priority/nice value */
342 priority
= task_prio(task
);
343 nice
= task_nice(task
);
345 read_lock(&tasklist_lock
);
346 ppid
= task
->pid
? task
->real_parent
->pid
: 0;
347 read_unlock(&tasklist_lock
);
348 res
= sprintf(buffer
,"%d (%s) %c %d %d %d %d %d %lu %lu \
349 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \
350 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
364 jiffies_to_clock_t(task
->utime
),
365 jiffies_to_clock_t(task
->stime
),
366 jiffies_to_clock_t(task
->cutime
),
367 jiffies_to_clock_t(task
->cstime
),
371 jiffies_to_clock_t(task
->it_real_value
),
373 jiffies_64_to_clock_t(task
->start_time
- INITIAL_JIFFIES
),
375 mm
? mm
->rss
: 0, /* you might want to shift this left 3 */
376 task
->rlim
[RLIMIT_RSS
].rlim_cur
,
377 mm
? mm
->start_code
: 0,
378 mm
? mm
->end_code
: 0,
379 mm
? mm
->start_stack
: 0,
382 /* The signal information here is obsolete.
383 * It must be decimal for Linux 2.0 compatibility.
384 * Use /proc/#/status for real-time signals.
386 task
->pending
.signal
.sig
[0] & 0x7fffffffUL
,
387 task
->blocked
.sig
[0] & 0x7fffffffUL
,
388 sigign
.sig
[0] & 0x7fffffffUL
,
389 sigcatch
.sig
[0] & 0x7fffffffUL
,
402 extern int task_statm(struct mm_struct
*, int *, int *, int *, int *);
403 int proc_pid_statm(struct task_struct
*task
, char *buffer
)
405 int size
= 0, resident
= 0, shared
= 0, text
= 0, lib
= 0, data
= 0;
406 struct mm_struct
*mm
= get_task_mm(task
);
409 down_read(&mm
->mmap_sem
);
410 size
= task_statm(mm
, &shared
, &text
, &data
, &resident
);
411 up_read(&mm
->mmap_sem
);
416 return sprintf(buffer
,"%d %d %d %d %d %d %d\n",
417 size
, resident
, shared
, text
, lib
, data
, 0);