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) \ 86 do { memcpy(buffer, string, strlen(string)); \ 87 buffer += strlen(string); } while (0) 88 89 static 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 */ 130 static 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 }; 139 140 static 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 } 157 158 static 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 } 198 199 static 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 } 223 224 static 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 } 238 239 static 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 } 279 280 static 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 } 289 290 int 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 } 310 311 static 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 } 461 462 int proc_tid_stat(struct task_struct *task, char * buffer) 463 { 464 return do_task_stat(task, buffer, 0); 465 } 466 467 int proc_tgid_stat(struct task_struct *task, char * buffer) 468 { 469 return do_task_stat(task, buffer, 1); 470 } 471 472 int 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 } 485