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>
76 #include <linux/ninline.h>
78 #include <asm/uaccess.h>
79 #include <asm/pgtable.h>
81 #include <asm/processor.h>
83 /* Gcc optimizes away "strlen(x)" for constant x */
84 #define ADDBUF(buffer, string) \
85 do { memcpy(buffer, string, strlen(string)); \
86 buffer += strlen(string); } while (0)
88 static inline char * task_name(struct task_struct *p, char * buf)
93 ADDBUF(buf, "Name:\t");
97 unsigned char c = *name;
121 * The task state array is a strange "bitmap" of
122 * reasons to sleep. Thus "running" is zero, and
123 * you can test for combinations of others with
126 static const char *task_state_array[] = {
127 "R (running)", /* 0 */
128 "S (sleeping)", /* 1 */
129 "D (disk sleep)", /* 2 */
130 "T (stopped)", /* 4 */
131 "Z (zombie)", /* 8 */
133 "H (on hold)" /* 32 */
136 static inline const char * get_task_state(struct task_struct *tsk)
138 unsigned int state = tsk->state & (TASK_RUNNING |
140 TASK_UNINTERRUPTIBLE |
144 const char **p = &task_state_array[0];
153 static inline char * task_state(struct task_struct *p, char *buffer)
155 struct group_info *group_info;
159 read_lock(&tasklist_lock);
160 ppid = vx_map_tgid(current->vx_info, p->real_parent->pid);
161 buffer += sprintf(buffer,
168 "Uid:\t%d\t%d\t%d\t%d\n"
169 "Gid:\t%d\t%d\t%d\t%d\n",
171 (p->sleep_avg/1024)*100/(1020000000/1024),
173 p->pid, p->pid ? ppid : 0,
174 p->pid && p->ptrace ? p->parent->pid : 0,
175 p->uid, p->euid, p->suid, p->fsuid,
176 p->gid, p->egid, p->sgid, p->fsgid);
177 read_unlock(&tasklist_lock);
179 buffer += sprintf(buffer,
182 p->files ? p->files->max_fds : 0);
184 group_info = p->group_info;
185 get_group_info(group_info);
188 for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
189 buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
190 put_group_info(group_info);
192 buffer += sprintf(buffer, "\n");
196 static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
200 len = strlen(header);
201 memcpy(buffer, header, len);
209 if (sigismember(set, i+1)) x |= 1;
210 if (sigismember(set, i+2)) x |= 2;
211 if (sigismember(set, i+3)) x |= 4;
212 if (sigismember(set, i+4)) x |= 8;
213 *buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
221 static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
224 struct k_sigaction *k;
227 k = p->sighand->action;
228 for (i = 1; i <= _NSIG; ++i, ++k) {
229 if (k->sa.sa_handler == SIG_IGN)
231 else if (k->sa.sa_handler != SIG_DFL)
236 static inline char * task_sig(struct task_struct *p, char *buffer)
238 sigset_t pending, shpending, blocked, ignored, caught;
241 sigemptyset(&pending);
242 sigemptyset(&shpending);
243 sigemptyset(&blocked);
244 sigemptyset(&ignored);
245 sigemptyset(&caught);
247 /* Gather all the data with the appropriate locks held */
248 read_lock(&tasklist_lock);
250 spin_lock_irq(&p->sighand->siglock);
251 pending = p->pending.signal;
252 shpending = p->signal->shared_pending.signal;
253 blocked = p->blocked;
254 collect_sigign_sigcatch(p, &ignored, &caught);
255 num_threads = atomic_read(&p->signal->count);
256 spin_unlock_irq(&p->sighand->siglock);
258 read_unlock(&tasklist_lock);
260 buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
262 /* render them all */
263 buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
264 buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
265 buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
266 buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
267 buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
272 static inline char *task_cap(struct task_struct *p, char *buffer)
274 return buffer + sprintf(buffer, "CapInh:\t%016x\n"
277 cap_t(p->cap_inheritable),
278 cap_t(p->cap_permitted),
279 cap_t(p->cap_effective));
282 extern char *task_mem(struct mm_struct *, char *);
283 int proc_pid_status(struct task_struct *task, char * buffer)
285 char * orig = buffer;
286 #ifdef CONFIG_VSERVER_LEGACY
290 struct mm_struct *mm = get_task_mm(task);
292 buffer = task_name(task, buffer);
293 buffer = task_state(task, buffer);
296 buffer = task_mem(mm, buffer);
299 buffer = task_sig(task, buffer);
300 buffer = task_cap(task, buffer);
302 #ifdef CONFIG_VSERVER_LEGACY
303 buffer += sprintf (buffer,"s_context: %d\n", vx_task_xid(task));
304 vxi = task_get_vx_info(task);
306 buffer += sprintf (buffer,"ctxflags: %08llx\n"
307 ,(unsigned long long)vxi->vx_flags);
308 buffer += sprintf (buffer,"initpid: %d\n"
311 buffer += sprintf (buffer,"ctxflags: none\n");
312 buffer += sprintf (buffer,"initpid: none\n");
315 nxi = task_get_nx_info(task);
319 buffer += sprintf (buffer,"ipv4root:");
320 for (i=0; i<nxi->nbipv4; i++){
321 buffer += sprintf (buffer," %08x/%08x"
326 buffer += sprintf (buffer,"ipv4root_bcast: %08x\n"
329 buffer += sprintf (buffer,"ipv4root: 0\n");
330 buffer += sprintf (buffer,"ipv4root_bcast: 0\n");
334 #if defined(CONFIG_ARCH_S390)
335 buffer = task_show_regs(task, buffer);
337 return buffer - orig;
340 extern unsigned long task_vsize(struct mm_struct *);
341 int proc_pid_stat(struct task_struct *task, char * buffer)
343 unsigned long vsize, eip, esp, wchan;
345 unsigned long long bias_jiffies;
346 int tty_pgrp = -1, tty_nr = 0;
347 sigset_t sigign, sigcatch;
350 pid_t ppid, pgid = -1, sid = -1;
352 struct mm_struct *mm;
353 unsigned long long start_time;
355 state = *get_task_state(task);
356 vsize = eip = esp = 0;
357 bias_jiffies = INITIAL_JIFFIES;
360 if (__vx_task_flags(task, VXF_VIRT_UPTIME, 0)) {
361 bias_jiffies = task->vx_info->cvirt.bias_jiffies;
362 /* hmm, do we need that? */
363 if (bias_jiffies > task->start_time)
364 bias_jiffies = task->start_time;
372 down_read(&mm->mmap_sem);
373 vsize = task_vsize(mm);
374 eip = KSTK_EIP(task);
375 esp = KSTK_ESP(task);
376 up_read(&mm->mmap_sem);
380 if (current->uid == task->uid || current->euid == task->uid ||
381 capable(CAP_SYS_NICE))
382 wchan = get_wchan(task);
384 sigemptyset(&sigign);
385 sigemptyset(&sigcatch);
386 read_lock(&tasklist_lock);
388 spin_lock_irq(&task->sighand->siglock);
389 num_threads = atomic_read(&task->signal->count);
390 collect_sigign_sigcatch(task, &sigign, &sigcatch);
391 spin_unlock_irq(&task->sighand->siglock);
394 if (task->signal->tty) {
395 tty_pgrp = task->signal->tty->pgrp;
396 tty_nr = new_encode_dev(tty_devnum(task->signal->tty));
398 pgid = process_group(task);
399 sid = task->signal->session;
401 read_unlock(&tasklist_lock);
403 /* scale priority and nice values from timeslices to -20..20 */
404 /* to make it look like a "normal" Unix priority/nice value */
405 priority = task_prio(task);
406 nice = task_nice(task);
408 read_lock(&tasklist_lock);
409 ppid = task->pid ? task->real_parent->pid : 0;
410 read_unlock(&tasklist_lock);
412 /* Temporary variable needed for gcc-2.96 */
413 start_time = jiffies_64_to_clock_t(task->start_time - bias_jiffies);
415 res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
416 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \
417 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
431 jiffies_to_clock_t(task->utime),
432 jiffies_to_clock_t(task->stime),
433 jiffies_to_clock_t(task->cutime),
434 jiffies_to_clock_t(task->cstime),
438 jiffies_to_clock_t(task->it_real_value),
441 mm ? mm->rss : 0, /* you might want to shift this left 3 */
442 task->rlim[RLIMIT_RSS].rlim_cur,
443 mm ? mm->start_code : 0,
444 mm ? mm->end_code : 0,
445 mm ? mm->start_stack : 0,
448 /* The signal information here is obsolete.
449 * It must be decimal for Linux 2.0 compatibility.
450 * Use /proc/#/status for real-time signals.
452 task->pending.signal.sig[0] & 0x7fffffffUL,
453 task->blocked.sig[0] & 0x7fffffffUL,
454 sigign .sig[0] & 0x7fffffffUL,
455 sigcatch .sig[0] & 0x7fffffffUL,
468 extern int task_statm(struct mm_struct *, int *, int *, int *, int *);
469 int proc_pid_statm(struct task_struct *task, char *buffer)
471 int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
472 struct mm_struct *mm = get_task_mm(task);
475 down_read(&mm->mmap_sem);
476 size = task_statm(mm, &shared, &text, &data, &resident);
477 up_read(&mm->mmap_sem);
482 return sprintf(buffer,"%d %d %d %d %d %d %d\n",
483 size, resident, shared, text, lib, data, 0);