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 |
142 const char **p = &task_state_array[0];
151 static inline char * task_state(struct task_struct *p, char *buffer)
153 struct group_info *group_info;
156 read_lock(&tasklist_lock);
157 buffer += sprintf(buffer,
164 "Uid:\t%d\t%d\t%d\t%d\n"
165 "Gid:\t%d\t%d\t%d\t%d\n",
167 (p->sleep_avg/1024)*100/(1020000000/1024),
169 p->pid, p->pid ? p->real_parent->pid : 0,
170 p->pid && p->ptrace ? p->parent->pid : 0,
171 p->uid, p->euid, p->suid, p->fsuid,
172 p->gid, p->egid, p->sgid, p->fsgid);
173 read_unlock(&tasklist_lock);
175 buffer += sprintf(buffer,
178 p->files ? p->files->max_fds : 0);
180 group_info = p->group_info;
181 get_group_info(group_info);
184 for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
185 buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
186 put_group_info(group_info);
188 buffer += sprintf(buffer, "\n");
192 static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
196 len = strlen(header);
197 memcpy(buffer, header, len);
205 if (sigismember(set, i+1)) x |= 1;
206 if (sigismember(set, i+2)) x |= 2;
207 if (sigismember(set, i+3)) x |= 4;
208 if (sigismember(set, i+4)) x |= 8;
209 *buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
217 static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
220 struct k_sigaction *k;
223 k = p->sighand->action;
224 for (i = 1; i <= _NSIG; ++i, ++k) {
225 if (k->sa.sa_handler == SIG_IGN)
227 else if (k->sa.sa_handler != SIG_DFL)
232 static inline char * task_sig(struct task_struct *p, char *buffer)
234 sigset_t pending, shpending, blocked, ignored, caught;
237 sigemptyset(&pending);
238 sigemptyset(&shpending);
239 sigemptyset(&blocked);
240 sigemptyset(&ignored);
241 sigemptyset(&caught);
243 /* Gather all the data with the appropriate locks held */
244 read_lock(&tasklist_lock);
246 spin_lock_irq(&p->sighand->siglock);
247 pending = p->pending.signal;
248 shpending = p->signal->shared_pending.signal;
249 blocked = p->blocked;
250 collect_sigign_sigcatch(p, &ignored, &caught);
251 num_threads = atomic_read(&p->signal->count);
252 spin_unlock_irq(&p->sighand->siglock);
254 read_unlock(&tasklist_lock);
256 buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
258 /* render them all */
259 buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
260 buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
261 buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
262 buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
263 buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
268 static inline char *task_cap(struct task_struct *p, char *buffer)
270 return buffer + sprintf(buffer, "CapInh:\t%016x\n"
273 cap_t(p->cap_inheritable),
274 cap_t(p->cap_permitted),
275 cap_t(p->cap_effective));
278 extern char *task_mem(struct mm_struct *, char *);
279 int proc_pid_status(struct task_struct *task, char * buffer)
281 char * orig = buffer;
282 struct mm_struct *mm = get_task_mm(task);
284 buffer = task_name(task, buffer);
285 buffer = task_state(task, buffer);
288 buffer = task_mem(mm, buffer);
291 buffer = task_sig(task, buffer);
292 buffer = task_cap(task, buffer);
293 #if defined(CONFIG_ARCH_S390)
294 buffer = task_show_regs(task, buffer);
296 return buffer - orig;
299 extern unsigned long task_vsize(struct mm_struct *);
300 int proc_pid_stat(struct task_struct *task, char * buffer)
302 unsigned long vsize, eip, esp, wchan;
304 int tty_pgrp = -1, tty_nr = 0;
305 sigset_t sigign, sigcatch;
308 pid_t ppid, pgid = -1, sid = -1;
310 struct mm_struct *mm;
311 unsigned long long start_time;
313 state = *get_task_state(task);
314 vsize = eip = esp = 0;
321 down_read(&mm->mmap_sem);
322 vsize = task_vsize(mm);
323 eip = KSTK_EIP(task);
324 esp = KSTK_ESP(task);
325 up_read(&mm->mmap_sem);
328 wchan = get_wchan(task);
330 sigemptyset(&sigign);
331 sigemptyset(&sigcatch);
332 read_lock(&tasklist_lock);
334 spin_lock_irq(&task->sighand->siglock);
335 num_threads = atomic_read(&task->signal->count);
336 collect_sigign_sigcatch(task, &sigign, &sigcatch);
337 spin_unlock_irq(&task->sighand->siglock);
340 if (task->signal->tty) {
341 tty_pgrp = task->signal->tty->pgrp;
342 tty_nr = new_encode_dev(tty_devnum(task->signal->tty));
344 pgid = process_group(task);
345 sid = task->signal->session;
347 read_unlock(&tasklist_lock);
349 /* scale priority and nice values from timeslices to -20..20 */
350 /* to make it look like a "normal" Unix priority/nice value */
351 priority = task_prio(task);
352 nice = task_nice(task);
354 read_lock(&tasklist_lock);
355 ppid = task->pid ? task->real_parent->pid : 0;
356 read_unlock(&tasklist_lock);
358 /* Temporary variable needed for gcc-2.96 */
359 start_time = jiffies_64_to_clock_t(task->start_time - INITIAL_JIFFIES);
361 res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
362 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \
363 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
377 jiffies_to_clock_t(task->utime),
378 jiffies_to_clock_t(task->stime),
379 jiffies_to_clock_t(task->cutime),
380 jiffies_to_clock_t(task->cstime),
384 jiffies_to_clock_t(task->it_real_value),
387 mm ? mm->rss : 0, /* you might want to shift this left 3 */
388 task->rlim[RLIMIT_RSS].rlim_cur,
389 mm ? mm->start_code : 0,
390 mm ? mm->end_code : 0,
391 mm ? mm->start_stack : 0,
394 /* The signal information here is obsolete.
395 * It must be decimal for Linux 2.0 compatibility.
396 * Use /proc/#/status for real-time signals.
398 task->pending.signal.sig[0] & 0x7fffffffUL,
399 task->blocked.sig[0] & 0x7fffffffUL,
400 sigign .sig[0] & 0x7fffffffUL,
401 sigcatch .sig[0] & 0x7fffffffUL,
414 extern int task_statm(struct mm_struct *, int *, int *, int *, int *);
415 int proc_pid_statm(struct task_struct *task, char *buffer)
417 int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
418 struct mm_struct *mm = get_task_mm(task);
421 down_read(&mm->mmap_sem);
422 size = task_statm(mm, &shared, &text, &data, &resident);
423 up_read(&mm->mmap_sem);
428 return sprintf(buffer,"%d %d %d %d %d %d %d\n",
429 size, resident, shared, text, lib, data, 0);