| 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 | * <[email protected]>
|
| 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 | * <[email protected]>
|
| 16 | *
|
| 17 | * Danny ter Haar : added cpuinfo
|
| 18 | * <[email protected]>
|
| 19 | *
|
| 20 | * Alessandro Rubini : profile extension.
|
| 21 | * <[email protected]>
|
| 22 | *
|
| 23 | * Jeff Tranter : added BogoMips field to cpuinfo
|
| 24 | * <[email protected]>
|
| 25 | *
|
| 26 | * Bruno Haible : remove 4K limit for the maps file
|
| 27 | * <[email protected]>
|
| 28 | *
|
| 29 | * Yves Arrouye : remove removal of trailing spaces in get_array.
|
| 30 | * <[email protected]>
|
| 31 | *
|
| 32 | * Jerome Forissier : added per-CPU time information to /proc/stat
|
| 33 | * and /proc/<pid>/cpu extension
|
| 34 | * <[email protected]>
|
| 35 | * - Incorporation and non-SMP safe operation
|
| 36 | * of forissier patch in 2.1.78 by
|
| 37 | * Hans Marcus <[email protected]>
|
| 38 | *
|
| 39 | * [email protected] : /proc/partitions
|
| 40 | *
|
| 41 | *
|
| 42 | * Alan Cox : security fixes.
|
| 43 | * <[email protected]>
|
| 44 | *
|
| 45 | * Al Viro : safe handling of mm_struct
|
| 46 | *
|
| 47 | * Gerhard Wichert : added BIGMEM support
|
| 48 | * Siemens AG <[email protected]>
|
| 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/types.h>
|
| 56 | #include <linux/errno.h>
|
| 57 | #include <linux/time.h>
|
| 58 | #include <linux/kernel.h>
|
| 59 | #include <linux/kernel_stat.h>
|
| 60 | #include <linux/tty.h>
|
| 61 | #include <linux/string.h>
|
| 62 | #include <linux/mman.h>
|
| 63 | #include <linux/proc_fs.h>
|
| 64 | #include <linux/ioport.h>
|
| 65 | #include <linux/mm.h>
|
| 66 | #include <linux/hugetlb.h>
|
| 67 | #include <linux/pagemap.h>
|
| 68 | #include <linux/swap.h>
|
| 69 | #include <linux/slab.h>
|
| 70 | #include <linux/smp.h>
|
| 71 | #include <linux/signal.h>
|
| 72 | #include <linux/highmem.h>
|
| 73 | #include <linux/file.h>
|
| 74 | #include <linux/times.h>
|
| 75 | #include <linux/cpuset.h>
|
| 76 | #include <linux/rcupdate.h>
|
| 77 | #include <linux/delayacct.h>
|
| 78 |
|
| 79 | #include <asm/uaccess.h>
|
| 80 | #include <asm/pgtable.h>
|
| 81 | #include <asm/io.h>
|
| 82 | #include <asm/processor.h>
|
| 83 | #include "internal.h"
|
| 84 |
|
| 85 |
|
| 86 | #define ADDBUF(buffer, string) \
|
| 87 | do { memcpy(buffer, string, strlen(string)); \
|
| 88 | buffer += strlen(string); } while (0)
|
| 89 |
|
| 90 | static inline char * task_name(struct task_struct *p, char * buf)
|
| 91 | {
|
| 92 | int i;
|
| 93 | char * name;
|
| 94 | char tcomm[sizeof(p->comm)];
|
| 95 |
|
| 96 | get_task_comm(tcomm, p);
|
| 97 |
|
| 98 | ADDBUF(buf, "Name:\t");
|
| 99 | name = tcomm;
|
| 100 | i = sizeof(tcomm);
|
| 101 | do {
|
| 102 | unsigned char c = *name;
|
| 103 | name++;
|
| 104 | i--;
|
| 105 | *buf = c;
|
| 106 | if (!c)
|
| 107 | break;
|
| 108 | if (c == '\\') {
|
| 109 | buf[1] = c;
|
| 110 | buf += 2;
|
| 111 | continue;
|
| 112 | }
|
| 113 | if (c == '\n') {
|
| 114 | buf[0] = '\\';
|
| 115 | buf[1] = 'n';
|
| 116 | buf += 2;
|
| 117 | continue;
|
| 118 | }
|
| 119 | buf++;
|
| 120 | } while (i);
|
| 121 | *buf = '\n';
|
| 122 | return buf+1;
|
| 123 | }
|
| 124 |
|
| 125 | |
| 126 | * The task state array is a strange "bitmap" of
|
| 127 | * reasons to sleep. Thus "running" is zero, and
|
| 128 | * you can test for combinations of others with
|
| 129 | * simple bit tests.
|
| 130 |
|
| 131 | static const char *task_state_array[] = {
|
| 132 | "R (running)",
|
| 133 | "S (sleeping)",
|
| 134 | "D (disk sleep)",
|
| 135 | "T (stopped)",
|
| 136 | "T (tracing stop)",
|
| 137 | "Z (zombie)",
|
| 138 | "X (dead)"
|
| 139 | };
|
| 140 |
|
| 141 | static inline const char * get_task_state(struct task_struct *tsk)
|
| 142 | {
|
| 143 | unsigned int state = (tsk->state & (TASK_RUNNING |
|
| 144 | TASK_INTERRUPTIBLE |
|
| 145 | TASK_UNINTERRUPTIBLE |
|
| 146 | TASK_STOPPED |
|
| 147 | TASK_TRACED)) |
|
| 148 | (tsk->exit_state & (EXIT_ZOMBIE |
|
| 149 | EXIT_DEAD));
|
| 150 | const char **p = &task_state_array[0];
|
| 151 |
|
| 152 | while (state) {
|
| 153 | p++;
|
| 154 | state >>= 1;
|
| 155 | }
|
| 156 | return *p;
|
| 157 | }
|
| 158 |
|
| 159 | static inline char * task_state(struct task_struct *p, char *buffer)
|
| 160 | {
|
| 161 | struct group_info *group_info;
|
| 162 | int g;
|
| 163 | struct fdtable *fdt = NULL;
|
| 164 |
|
| 165 | rcu_read_lock();
|
| 166 | buffer += sprintf(buffer,
|
| 167 | "State:\t%s\n"
|
| 168 | "SleepAVG:\t%lu%%\n"
|
| 169 | "Tgid:\t%d\n"
|
| 170 | "Pid:\t%d\n"
|
| 171 | "PPid:\t%d\n"
|
| 172 | "TracerPid:\t%d\n"
|
| 173 | "Uid:\t%d\t%d\t%d\t%d\n"
|
| 174 | "Gid:\t%d\t%d\t%d\t%d\n",
|
| 175 | get_task_state(p),
|
| 176 | (p->sleep_avg/1024)*100/(1020000000/1024),
|
| 177 | p->tgid, p->pid,
|
| 178 | pid_alive(p) ? rcu_dereference(p->real_parent)->tgid : 0,
|
| 179 | pid_alive(p) && p->ptrace ? rcu_dereference(p->parent)->pid : 0,
|
| 180 | p->uid, p->euid, p->suid, p->fsuid,
|
| 181 | p->gid, p->egid, p->sgid, p->fsgid);
|
| 182 |
|
| 183 | task_lock(p);
|
| 184 | if (p->files)
|
| 185 | fdt = files_fdtable(p->files);
|
| 186 | buffer += sprintf(buffer,
|
| 187 | "FDSize:\t%d\n"
|
| 188 | "Groups:\t",
|
| 189 | fdt ? fdt->max_fds : 0);
|
| 190 | rcu_read_unlock();
|
| 191 |
|
| 192 | group_info = p->group_info;
|
| 193 | get_group_info(group_info);
|
| 194 | task_unlock(p);
|
| 195 |
|
| 196 | for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
|
| 197 | buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
|
| 198 | put_group_info(group_info);
|
| 199 |
|
| 200 | buffer += sprintf(buffer, "\n");
|
| 201 | return buffer;
|
| 202 | }
|
| 203 |
|
| 204 | static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
|
| 205 | {
|
| 206 | int i, len;
|
| 207 |
|
| 208 | len = strlen(header);
|
| 209 | memcpy(buffer, header, len);
|
| 210 | buffer += len;
|
| 211 |
|
| 212 | i = _NSIG;
|
| 213 | do {
|
| 214 | int x = 0;
|
| 215 |
|
| 216 | i -= 4;
|
| 217 | if (sigismember(set, i+1)) x |= 1;
|
| 218 | if (sigismember(set, i+2)) x |= 2;
|
| 219 | if (sigismember(set, i+3)) x |= 4;
|
| 220 | if (sigismember(set, i+4)) x |= 8;
|
| 221 | *buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
|
| 222 | } while (i >= 4);
|
| 223 |
|
| 224 | *buffer++ = '\n';
|
| 225 | *buffer = 0;
|
| 226 | return buffer;
|
| 227 | }
|
| 228 |
|
| 229 | static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
|
| 230 | sigset_t *catch)
|
| 231 | {
|
| 232 | struct k_sigaction *k;
|
| 233 | int i;
|
| 234 |
|
| 235 | k = p->sighand->action;
|
| 236 | for (i = 1; i <= _NSIG; ++i, ++k) {
|
| 237 | if (k->sa.sa_handler == SIG_IGN)
|
| 238 | sigaddset(ign, i);
|
| 239 | else if (k->sa.sa_handler != SIG_DFL)
|
| 240 | sigaddset(catch, i);
|
| 241 | }
|
| 242 | }
|
| 243 |
|
| 244 | static inline char * task_sig(struct task_struct *p, char *buffer)
|
| 245 | {
|
| 246 | unsigned long flags;
|
| 247 | sigset_t pending, shpending, blocked, ignored, caught;
|
| 248 | int num_threads = 0;
|
| 249 | unsigned long qsize = 0;
|
| 250 | unsigned long qlim = 0;
|
| 251 |
|
| 252 | sigemptyset(&pending);
|
| 253 | sigemptyset(&shpending);
|
| 254 | sigemptyset(&blocked);
|
| 255 | sigemptyset(&ignored);
|
| 256 | sigemptyset(&caught);
|
| 257 |
|
| 258 | rcu_read_lock();
|
| 259 | if (lock_task_sighand(p, &flags)) {
|
| 260 | pending = p->pending.signal;
|
| 261 | shpending = p->signal->shared_pending.signal;
|
| 262 | blocked = p->blocked;
|
| 263 | collect_sigign_sigcatch(p, &ignored, &caught);
|
| 264 | num_threads = atomic_read(&p->signal->count);
|
| 265 | qsize = atomic_read(&p->user->sigpending);
|
| 266 | qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
|
| 267 | unlock_task_sighand(p, &flags);
|
| 268 | }
|
| 269 | rcu_read_unlock();
|
| 270 |
|
| 271 | buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
|
| 272 | buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);
|
| 273 |
|
| 274 |
|
| 275 | buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
|
| 276 | buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
|
| 277 | buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
|
| 278 | buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
|
| 279 | buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
|
| 280 |
|
| 281 | return buffer;
|
| 282 | }
|
| 283 |
|
| 284 | static inline char *task_cap(struct task_struct *p, char *buffer)
|
| 285 | {
|
| 286 | return buffer + sprintf(buffer, "CapInh:\t%016x\n"
|
| 287 | "CapPrm:\t%016x\n"
|
| 288 | "CapEff:\t%016x\n",
|
| 289 | cap_t(p->cap_inheritable),
|
| 290 | cap_t(p->cap_permitted),
|
| 291 | cap_t(p->cap_effective));
|
| 292 | }
|
| 293 |
|
| 294 | int proc_pid_status(struct task_struct *task, char * buffer)
|
| 295 | {
|
| 296 | char * orig = buffer;
|
| 297 | struct mm_struct *mm = get_task_mm(task);
|
| 298 |
|
| 299 | buffer = task_name(task, buffer);
|
| 300 | buffer = task_state(task, buffer);
|
| 301 |
|
| 302 | if (mm) {
|
| 303 | buffer = task_mem(mm, buffer);
|
| 304 | mmput(mm);
|
| 305 | }
|
| 306 | buffer = task_sig(task, buffer);
|
| 307 | buffer = task_cap(task, buffer);
|
| 308 | buffer = cpuset_task_status_allowed(task, buffer);
|
| 309 | #if defined(CONFIG_S390)
|
| 310 | buffer = task_show_regs(task, buffer);
|
| 311 | #endif
|
| 312 | return buffer - orig;
|
| 313 | }
|
| 314 |
|
| 315 | static int do_task_stat(struct task_struct *task, char * buffer, int whole)
|
| 316 | {
|
| 317 | unsigned long vsize, eip, esp, wchan = ~0UL;
|
| 318 | long priority, nice;
|
| 319 | int tty_pgrp = -1, tty_nr = 0;
|
| 320 | sigset_t sigign, sigcatch;
|
| 321 | char state;
|
| 322 | int res;
|
| 323 | pid_t ppid = 0, pgid = -1, sid = -1;
|
| 324 | int num_threads = 0;
|
| 325 | struct mm_struct *mm;
|
| 326 | unsigned long long start_time;
|
| 327 | unsigned long cmin_flt = 0, cmaj_flt = 0;
|
| 328 | unsigned long min_flt = 0, maj_flt = 0;
|
| 329 | cputime_t cutime, cstime, utime, stime;
|
| 330 | unsigned long rsslim = 0;
|
| 331 | char tcomm[sizeof(task->comm)];
|
| 332 | unsigned long flags;
|
| 333 |
|
| 334 | state = *get_task_state(task);
|
| 335 | vsize = eip = esp = 0;
|
| 336 | mm = get_task_mm(task);
|
| 337 | if (mm) {
|
| 338 | vsize = task_vsize(mm);
|
| 339 | eip = KSTK_EIP(task);
|
| 340 | esp = KSTK_ESP(task);
|
| 341 | }
|
| 342 |
|
| 343 | get_task_comm(tcomm, task);
|
| 344 |
|
| 345 | sigemptyset(&sigign);
|
| 346 | sigemptyset(&sigcatch);
|
| 347 | cutime = cstime = utime = stime = cputime_zero;
|
| 348 |
|
| 349 | rcu_read_lock();
|
| 350 | if (lock_task_sighand(task, &flags)) {
|
| 351 | struct signal_struct *sig = task->signal;
|
| 352 |
|
| 353 | if (sig->tty) {
|
| 354 | tty_pgrp = pid_nr(sig->tty->pgrp);
|
| 355 | tty_nr = new_encode_dev(tty_devnum(sig->tty));
|
| 356 | }
|
| 357 |
|
| 358 | num_threads = atomic_read(&sig->count);
|
| 359 | collect_sigign_sigcatch(task, &sigign, &sigcatch);
|
| 360 |
|
| 361 | cmin_flt = sig->cmin_flt;
|
| 362 | cmaj_flt = sig->cmaj_flt;
|
| 363 | cutime = sig->cutime;
|
| 364 | cstime = sig->cstime;
|
| 365 | rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;
|
| 366 |
|
| 367 |
|
| 368 | if (whole) {
|
| 369 | struct task_struct *t = task;
|
| 370 | do {
|
| 371 | min_flt += t->min_flt;
|
| 372 | maj_flt += t->maj_flt;
|
| 373 | utime = cputime_add(utime, t->utime);
|
| 374 | stime = cputime_add(stime, t->stime);
|
| 375 | t = next_thread(t);
|
| 376 | } while (t != task);
|
| 377 |
|
| 378 | min_flt += sig->min_flt;
|
| 379 | maj_flt += sig->maj_flt;
|
| 380 | utime = cputime_add(utime, sig->utime);
|
| 381 | stime = cputime_add(stime, sig->stime);
|
| 382 | }
|
| 383 |
|
| 384 | sid = signal_session(sig);
|
| 385 | pgid = process_group(task);
|
| 386 | ppid = rcu_dereference(task->real_parent)->tgid;
|
| 387 |
|
| 388 | unlock_task_sighand(task, &flags);
|
| 389 | }
|
| 390 | rcu_read_unlock();
|
| 391 |
|
| 392 | if (!whole || num_threads<2)
|
| 393 | wchan = get_wchan(task);
|
| 394 | if (!whole) {
|
| 395 | min_flt = task->min_flt;
|
| 396 | maj_flt = task->maj_flt;
|
| 397 | utime = task->utime;
|
| 398 | stime = task->stime;
|
| 399 | }
|
| 400 |
|
| 401 |
|
| 402 |
|
| 403 | priority = task_prio(task);
|
| 404 | nice = task_nice(task);
|
| 405 |
|
| 406 |
|
| 407 |
|
| 408 | start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
|
| 409 | + task->start_time.tv_nsec;
|
| 410 |
|
| 411 | start_time = nsec_to_clock_t(start_time);
|
| 412 |
|
| 413 | res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
|
| 414 | %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
|
| 415 | %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu %llu\n",
|
| 416 | task->pid,
|
| 417 | tcomm,
|
| 418 | state,
|
| 419 | ppid,
|
| 420 | pgid,
|
| 421 | sid,
|
| 422 | tty_nr,
|
| 423 | tty_pgrp,
|
| 424 | task->flags,
|
| 425 | min_flt,
|
| 426 | cmin_flt,
|
| 427 | maj_flt,
|
| 428 | cmaj_flt,
|
| 429 | cputime_to_clock_t(utime),
|
| 430 | cputime_to_clock_t(stime),
|
| 431 | cputime_to_clock_t(cutime),
|
| 432 | cputime_to_clock_t(cstime),
|
| 433 | priority,
|
| 434 | nice,
|
| 435 | num_threads,
|
| 436 | start_time,
|
| 437 | vsize,
|
| 438 | mm ? get_mm_rss(mm) : 0,
|
| 439 | rsslim,
|
| 440 | mm ? mm->start_code : 0,
|
| 441 | mm ? mm->end_code : 0,
|
| 442 | mm ? mm->start_stack : 0,
|
| 443 | esp,
|
| 444 | eip,
|
| 445 | |
| 446 | * It must be decimal for Linux 2.0 compatibility.
|
| 447 | * Use /proc/#/status for real-time signals.
|
| 448 |
|
| 449 | task->pending.signal.sig[0] & 0x7fffffffUL,
|
| 450 | task->blocked.sig[0] & 0x7fffffffUL,
|
| 451 | sigign .sig[0] & 0x7fffffffUL,
|
| 452 | sigcatch .sig[0] & 0x7fffffffUL,
|
| 453 | wchan,
|
| 454 | 0UL,
|
| 455 | 0UL,
|
| 456 | task->exit_signal,
|
| 457 | task_cpu(task),
|
| 458 | task->rt_priority,
|
| 459 | task->policy,
|
| 460 | (unsigned long long)delayacct_blkio_ticks(task));
|
| 461 | if(mm)
|
| 462 | mmput(mm);
|
| 463 | return res;
|
| 464 | }
|
| 465 |
|
| 466 | int proc_tid_stat(struct task_struct *task, char * buffer)
|
| 467 | {
|
| 468 | return do_task_stat(task, buffer, 0);
|
| 469 | }
|
| 470 |
|
| 471 | int proc_tgid_stat(struct task_struct *task, char * buffer)
|
| 472 | {
|
| 473 | return do_task_stat(task, buffer, 1);
|
| 474 | }
|
| 475 |
|
| 476 | int proc_pid_statm(struct task_struct *task, char *buffer)
|
| 477 | {
|
| 478 | int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
|
| 479 | struct mm_struct *mm = get_task_mm(task);
|
| 480 |
|
| 481 | if (mm) {
|
| 482 | size = task_statm(mm, &shared, &text, &data, &resident);
|
| 483 | mmput(mm);
|
| 484 | }
|
| 485 |
|
| 486 | return sprintf(buffer,"%d %d %d %d %d %d %d\n",
|
| 487 | size, resident, shared, text, lib, data, 0);
|
| 488 | }
|