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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/proc/array.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/proc/array.c')
-rw-r--r--fs/proc/array.c484
1 files changed, 484 insertions, 0 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
new file mode 100644
index 000000000000..37668fe998ad
--- /dev/null
+++ b/fs/proc/array.c
@@ -0,0 +1,484 @@
1/*
2 * linux/fs/proc/array.c
3 *
4 * Copyright (C) 1992 by Linus Torvalds
5 * based on ideas by Darren Senn
6 *
7 * Fixes:
8 * Michael. K. Johnson: stat,statm extensions.
9 * <johnsonm@stolaf.edu>
10 *
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>
16 *
17 * Danny ter Haar : added cpuinfo
18 * <dth@cistron.nl>
19 *
20 * Alessandro Rubini : profile extension.
21 * <rubini@ipvvis.unipv.it>
22 *
23 * Jeff Tranter : added BogoMips field to cpuinfo
24 * <Jeff_Tranter@Mitel.COM>
25 *
26 * Bruno Haible : remove 4K limit for the maps file
27 * <haible@ma2s2.mathematik.uni-karlsruhe.de>
28 *
29 * Yves Arrouye : remove removal of trailing spaces in get_array.
30 * <Yves.Arrouye@marin.fdn.fr>
31 *
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>
38 *
39 * aeb@cwi.nl : /proc/partitions
40 *
41 *
42 * Alan Cox : security fixes.
43 * <Alan.Cox@linux.org>
44 *
45 * Al Viro : safe handling of mm_struct
46 *
47 * Gerhard Wichert : added BIGMEM support
48 * Siemens AG <Gerhard.Wichert@pdb.siemens.de>
49 *
50 * Al Viro & Jeff Garzik : moved most of the thing into base.c and
51 * : proc_misc.c. The rest may eventually go into
52 * : base.c too.
53 */
54
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>
66#include <linux/mm.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>
76#include <linux/cpuset.h>
77
78#include <asm/uaccess.h>
79#include <asm/pgtable.h>
80#include <asm/io.h>
81#include <asm/processor.h>
82#include "internal.h"
83
84/* Gcc optimizes away "strlen(x)" for constant x */
85#define ADDBUF(buffer, string) \
86do { memcpy(buffer, string, strlen(string)); \
87 buffer += strlen(string); } while (0)
88
89static inline char * task_name(struct task_struct *p, char * buf)
90{
91 int i;
92 char * name;
93 char tcomm[sizeof(p->comm)];
94
95 get_task_comm(tcomm, p);
96
97 ADDBUF(buf, "Name:\t");
98 name = tcomm;
99 i = sizeof(tcomm);
100 do {
101 unsigned char c = *name;
102 name++;
103 i--;
104 *buf = c;
105 if (!c)
106 break;
107 if (c == '\\') {
108 buf[1] = c;
109 buf += 2;
110 continue;
111 }
112 if (c == '\n') {
113 buf[0] = '\\';
114 buf[1] = 'n';
115 buf += 2;
116 continue;
117 }
118 buf++;
119 } while (i);
120 *buf = '\n';
121 return buf+1;
122}
123
124/*
125 * The task state array is a strange "bitmap" of
126 * reasons to sleep. Thus "running" is zero, and
127 * you can test for combinations of others with
128 * simple bit tests.
129 */
130static const char *task_state_array[] = {
131 "R (running)", /* 0 */
132 "S (sleeping)", /* 1 */
133 "D (disk sleep)", /* 2 */
134 "T (stopped)", /* 4 */
135 "T (tracing stop)", /* 8 */
136 "Z (zombie)", /* 16 */
137 "X (dead)" /* 32 */
138};
139
140static inline const char * get_task_state(struct task_struct *tsk)
141{
142 unsigned int state = (tsk->state & (TASK_RUNNING |
143 TASK_INTERRUPTIBLE |
144 TASK_UNINTERRUPTIBLE |
145 TASK_STOPPED |
146 TASK_TRACED)) |
147 (tsk->exit_state & (EXIT_ZOMBIE |
148 EXIT_DEAD));
149 const char **p = &task_state_array[0];
150
151 while (state) {
152 p++;
153 state >>= 1;
154 }
155 return *p;
156}
157
158static inline char * task_state(struct task_struct *p, char *buffer)
159{
160 struct group_info *group_info;
161 int g;
162
163 read_lock(&tasklist_lock);
164 buffer += sprintf(buffer,
165 "State:\t%s\n"
166 "SleepAVG:\t%lu%%\n"
167 "Tgid:\t%d\n"
168 "Pid:\t%d\n"
169 "PPid:\t%d\n"
170 "TracerPid:\t%d\n"
171 "Uid:\t%d\t%d\t%d\t%d\n"
172 "Gid:\t%d\t%d\t%d\t%d\n",
173 get_task_state(p),
174 (p->sleep_avg/1024)*100/(1020000000/1024),
175 p->tgid,
176 p->pid, pid_alive(p) ? p->group_leader->real_parent->tgid : 0,
177 pid_alive(p) && p->ptrace ? p->parent->pid : 0,
178 p->uid, p->euid, p->suid, p->fsuid,
179 p->gid, p->egid, p->sgid, p->fsgid);
180 read_unlock(&tasklist_lock);
181 task_lock(p);
182 buffer += sprintf(buffer,
183 "FDSize:\t%d\n"
184 "Groups:\t",
185 p->files ? p->files->max_fds : 0);
186
187 group_info = p->group_info;
188 get_group_info(group_info);
189 task_unlock(p);
190
191 for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
192 buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
193 put_group_info(group_info);
194
195 buffer += sprintf(buffer, "\n");
196 return buffer;
197}
198
199static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
200{
201 int i, len;
202
203 len = strlen(header);
204 memcpy(buffer, header, len);
205 buffer += len;
206
207 i = _NSIG;
208 do {
209 int x = 0;
210
211 i -= 4;
212 if (sigismember(set, i+1)) x |= 1;
213 if (sigismember(set, i+2)) x |= 2;
214 if (sigismember(set, i+3)) x |= 4;
215 if (sigismember(set, i+4)) x |= 8;
216 *buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
217 } while (i >= 4);
218
219 *buffer++ = '\n';
220 *buffer = 0;
221 return buffer;
222}
223
224static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
225 sigset_t *catch)
226{
227 struct k_sigaction *k;
228 int i;
229
230 k = p->sighand->action;
231 for (i = 1; i <= _NSIG; ++i, ++k) {
232 if (k->sa.sa_handler == SIG_IGN)
233 sigaddset(ign, i);
234 else if (k->sa.sa_handler != SIG_DFL)
235 sigaddset(catch, i);
236 }
237}
238
239static inline char * task_sig(struct task_struct *p, char *buffer)
240{
241 sigset_t pending, shpending, blocked, ignored, caught;
242 int num_threads = 0;
243 unsigned long qsize = 0;
244 unsigned long qlim = 0;
245
246 sigemptyset(&pending);
247 sigemptyset(&shpending);
248 sigemptyset(&blocked);
249 sigemptyset(&ignored);
250 sigemptyset(&caught);
251
252 /* Gather all the data with the appropriate locks held */
253 read_lock(&tasklist_lock);
254 if (p->sighand) {
255 spin_lock_irq(&p->sighand->siglock);
256 pending = p->pending.signal;
257 shpending = p->signal->shared_pending.signal;
258 blocked = p->blocked;
259 collect_sigign_sigcatch(p, &ignored, &caught);
260 num_threads = atomic_read(&p->signal->count);
261 qsize = atomic_read(&p->user->sigpending);
262 qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
263 spin_unlock_irq(&p->sighand->siglock);
264 }
265 read_unlock(&tasklist_lock);
266
267 buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
268 buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);
269
270 /* render them all */
271 buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
272 buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
273 buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
274 buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
275 buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
276
277 return buffer;
278}
279
280static inline char *task_cap(struct task_struct *p, char *buffer)
281{
282 return buffer + sprintf(buffer, "CapInh:\t%016x\n"
283 "CapPrm:\t%016x\n"
284 "CapEff:\t%016x\n",
285 cap_t(p->cap_inheritable),
286 cap_t(p->cap_permitted),
287 cap_t(p->cap_effective));
288}
289
290int proc_pid_status(struct task_struct *task, char * buffer)
291{
292 char * orig = buffer;
293 struct mm_struct *mm = get_task_mm(task);
294
295 buffer = task_name(task, buffer);
296 buffer = task_state(task, buffer);
297
298 if (mm) {
299 buffer = task_mem(mm, buffer);
300 mmput(mm);
301 }
302 buffer = task_sig(task, buffer);
303 buffer = task_cap(task, buffer);
304 buffer = cpuset_task_status_allowed(task, buffer);
305#if defined(CONFIG_ARCH_S390)
306 buffer = task_show_regs(task, buffer);
307#endif
308 return buffer - orig;
309}
310
311static int do_task_stat(struct task_struct *task, char * buffer, int whole)
312{
313 unsigned long vsize, eip, esp, wchan = ~0UL;
314 long priority, nice;
315 int tty_pgrp = -1, tty_nr = 0;
316 sigset_t sigign, sigcatch;
317 char state;
318 int res;
319 pid_t ppid, pgid = -1, sid = -1;
320 int num_threads = 0;
321 struct mm_struct *mm;
322 unsigned long long start_time;
323 unsigned long cmin_flt = 0, cmaj_flt = 0;
324 unsigned long min_flt = 0, maj_flt = 0;
325 cputime_t cutime, cstime, utime, stime;
326 unsigned long rsslim = 0;
327 unsigned long it_real_value = 0;
328 struct task_struct *t;
329 char tcomm[sizeof(task->comm)];
330
331 state = *get_task_state(task);
332 vsize = eip = esp = 0;
333 mm = get_task_mm(task);
334 if (mm) {
335 vsize = task_vsize(mm);
336 eip = KSTK_EIP(task);
337 esp = KSTK_ESP(task);
338 }
339
340 get_task_comm(tcomm, task);
341
342 sigemptyset(&sigign);
343 sigemptyset(&sigcatch);
344 cutime = cstime = utime = stime = cputime_zero;
345 read_lock(&tasklist_lock);
346 if (task->sighand) {
347 spin_lock_irq(&task->sighand->siglock);
348 num_threads = atomic_read(&task->signal->count);
349 collect_sigign_sigcatch(task, &sigign, &sigcatch);
350
351 /* add up live thread stats at the group level */
352 if (whole) {
353 t = task;
354 do {
355 min_flt += t->min_flt;
356 maj_flt += t->maj_flt;
357 utime = cputime_add(utime, t->utime);
358 stime = cputime_add(stime, t->stime);
359 t = next_thread(t);
360 } while (t != task);
361 }
362
363 spin_unlock_irq(&task->sighand->siglock);
364 }
365 if (task->signal) {
366 if (task->signal->tty) {
367 tty_pgrp = task->signal->tty->pgrp;
368 tty_nr = new_encode_dev(tty_devnum(task->signal->tty));
369 }
370 pgid = process_group(task);
371 sid = task->signal->session;
372 cmin_flt = task->signal->cmin_flt;
373 cmaj_flt = task->signal->cmaj_flt;
374 cutime = task->signal->cutime;
375 cstime = task->signal->cstime;
376 rsslim = task->signal->rlim[RLIMIT_RSS].rlim_cur;
377 if (whole) {
378 min_flt += task->signal->min_flt;
379 maj_flt += task->signal->maj_flt;
380 utime = cputime_add(utime, task->signal->utime);
381 stime = cputime_add(stime, task->signal->stime);
382 }
383 it_real_value = task->signal->it_real_value;
384 }
385 ppid = pid_alive(task) ? task->group_leader->real_parent->tgid : 0;
386 read_unlock(&tasklist_lock);
387
388 if (!whole || num_threads<2)
389 wchan = get_wchan(task);
390 if (!whole) {
391 min_flt = task->min_flt;
392 maj_flt = task->maj_flt;
393 utime = task->utime;
394 stime = task->stime;
395 }
396
397 /* scale priority and nice values from timeslices to -20..20 */
398 /* to make it look like a "normal" Unix priority/nice value */
399 priority = task_prio(task);
400 nice = task_nice(task);
401
402 /* Temporary variable needed for gcc-2.96 */
403 /* convert timespec -> nsec*/
404 start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
405 + task->start_time.tv_nsec;
406 /* convert nsec -> ticks */
407 start_time = nsec_to_clock_t(start_time);
408
409 res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
410%lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \
411%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
412 task->pid,
413 tcomm,
414 state,
415 ppid,
416 pgid,
417 sid,
418 tty_nr,
419 tty_pgrp,
420 task->flags,
421 min_flt,
422 cmin_flt,
423 maj_flt,
424 cmaj_flt,
425 cputime_to_clock_t(utime),
426 cputime_to_clock_t(stime),
427 cputime_to_clock_t(cutime),
428 cputime_to_clock_t(cstime),
429 priority,
430 nice,
431 num_threads,
432 jiffies_to_clock_t(it_real_value),
433 start_time,
434 vsize,
435 mm ? get_mm_counter(mm, rss) : 0, /* you might want to shift this left 3 */
436 rsslim,
437 mm ? mm->start_code : 0,
438 mm ? mm->end_code : 0,
439 mm ? mm->start_stack : 0,
440 esp,
441 eip,
442 /* The signal information here is obsolete.
443 * It must be decimal for Linux 2.0 compatibility.
444 * Use /proc/#/status for real-time signals.
445 */
446 task->pending.signal.sig[0] & 0x7fffffffUL,
447 task->blocked.sig[0] & 0x7fffffffUL,
448 sigign .sig[0] & 0x7fffffffUL,
449 sigcatch .sig[0] & 0x7fffffffUL,
450 wchan,
451 0UL,
452 0UL,
453 task->exit_signal,
454 task_cpu(task),
455 task->rt_priority,
456 task->policy);
457 if(mm)
458 mmput(mm);
459 return res;
460}
461
462int proc_tid_stat(struct task_struct *task, char * buffer)
463{
464 return do_task_stat(task, buffer, 0);
465}
466
467int proc_tgid_stat(struct task_struct *task, char * buffer)
468{
469 return do_task_stat(task, buffer, 1);
470}
471
472int proc_pid_statm(struct task_struct *task, char *buffer)
473{
474 int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
475 struct mm_struct *mm = get_task_mm(task);
476
477 if (mm) {
478 size = task_statm(mm, &shared, &text, &data, &resident);
479 mmput(mm);
480 }
481
482 return sprintf(buffer,"%d %d %d %d %d %d %d\n",
483 size, resident, shared, text, lib, data, 0);
484}