Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 65 | #include <linux/uaccess.h> |
| 66 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #include <linux/mm.h> |
| 68 | #include <linux/hugetlb.h> |
| 69 | #include <linux/pagemap.h> |
| 70 | #include <linux/swap.h> |
| 71 | #include <linux/slab.h> |
| 72 | #include <linux/smp.h> |
| 73 | #include <linux/signal.h> |
| 74 | #include <linux/highmem.h> |
| 75 | #include <linux/file.h> |
| 76 | #include <linux/times.h> |
| 77 | #include <linux/cpuset.h> |
Dipankar Sarma | 4fb3a53 | 2005-09-16 19:28:13 -0700 | [diff] [blame] | 78 | #include <linux/rcupdate.h> |
Shailabh Nagar | 2589045 | 2006-07-14 00:24:43 -0700 | [diff] [blame] | 79 | #include <linux/delayacct.h> |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 80 | #include <linux/pid_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | #include <asm/pgtable.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #include <asm/processor.h> |
| 84 | #include "internal.h" |
| 85 | |
| 86 | /* Gcc optimizes away "strlen(x)" for constant x */ |
| 87 | #define ADDBUF(buffer, string) \ |
| 88 | do { memcpy(buffer, string, strlen(string)); \ |
| 89 | buffer += strlen(string); } while (0) |
| 90 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 91 | static inline char *task_name(struct task_struct *p, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | { |
| 93 | int i; |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 94 | char *name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | char tcomm[sizeof(p->comm)]; |
| 96 | |
| 97 | get_task_comm(tcomm, p); |
| 98 | |
| 99 | ADDBUF(buf, "Name:\t"); |
| 100 | name = tcomm; |
| 101 | i = sizeof(tcomm); |
| 102 | do { |
| 103 | unsigned char c = *name; |
| 104 | name++; |
| 105 | i--; |
| 106 | *buf = c; |
| 107 | if (!c) |
| 108 | break; |
| 109 | if (c == '\\') { |
| 110 | buf[1] = c; |
| 111 | buf += 2; |
| 112 | continue; |
| 113 | } |
| 114 | if (c == '\n') { |
| 115 | buf[0] = '\\'; |
| 116 | buf[1] = 'n'; |
| 117 | buf += 2; |
| 118 | continue; |
| 119 | } |
| 120 | buf++; |
| 121 | } while (i); |
| 122 | *buf = '\n'; |
| 123 | return buf+1; |
| 124 | } |
| 125 | |
| 126 | /* |
| 127 | * The task state array is a strange "bitmap" of |
| 128 | * reasons to sleep. Thus "running" is zero, and |
| 129 | * you can test for combinations of others with |
| 130 | * simple bit tests. |
| 131 | */ |
| 132 | static const char *task_state_array[] = { |
| 133 | "R (running)", /* 0 */ |
| 134 | "S (sleeping)", /* 1 */ |
| 135 | "D (disk sleep)", /* 2 */ |
| 136 | "T (stopped)", /* 4 */ |
| 137 | "T (tracing stop)", /* 8 */ |
| 138 | "Z (zombie)", /* 16 */ |
| 139 | "X (dead)" /* 32 */ |
| 140 | }; |
| 141 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 142 | static inline const char *get_task_state(struct task_struct *tsk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | { |
Matthew Wilcox | 1587e2b | 2007-12-06 11:03:36 -0500 | [diff] [blame] | 144 | unsigned int state = (tsk->state & TASK_REPORT) | tsk->exit_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | const char **p = &task_state_array[0]; |
| 146 | |
| 147 | while (state) { |
| 148 | p++; |
| 149 | state >>= 1; |
| 150 | } |
| 151 | return *p; |
| 152 | } |
| 153 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 154 | static inline char *task_state(struct task_struct *p, char *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | { |
| 156 | struct group_info *group_info; |
| 157 | int g; |
Dipankar Sarma | badf166 | 2005-09-09 13:04:10 -0700 | [diff] [blame] | 158 | struct fdtable *fdt = NULL; |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 159 | struct pid_namespace *ns; |
| 160 | pid_t ppid, tpid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 162 | ns = current->nsproxy->pid_ns; |
Oleg Nesterov | b0fa9db | 2006-10-02 02:18:54 -0700 | [diff] [blame] | 163 | rcu_read_lock(); |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 164 | ppid = pid_alive(p) ? |
| 165 | task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0; |
| 166 | tpid = pid_alive(p) && p->ptrace ? |
Roland McGrath | 84427ea | 2008-01-10 12:52:04 -0800 | [diff] [blame] | 167 | task_pid_nr_ns(rcu_dereference(p->parent), ns) : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | buffer += sprintf(buffer, |
| 169 | "State:\t%s\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | "Tgid:\t%d\n" |
| 171 | "Pid:\t%d\n" |
| 172 | "PPid:\t%d\n" |
| 173 | "TracerPid:\t%d\n" |
| 174 | "Uid:\t%d\t%d\t%d\t%d\n" |
| 175 | "Gid:\t%d\t%d\t%d\t%d\n", |
| 176 | get_task_state(p), |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 177 | task_tgid_nr_ns(p, ns), |
| 178 | task_pid_nr_ns(p, ns), |
| 179 | ppid, tpid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | p->uid, p->euid, p->suid, p->fsuid, |
| 181 | p->gid, p->egid, p->sgid, p->fsgid); |
Oleg Nesterov | b0fa9db | 2006-10-02 02:18:54 -0700 | [diff] [blame] | 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | task_lock(p); |
Dipankar Sarma | badf166 | 2005-09-09 13:04:10 -0700 | [diff] [blame] | 184 | if (p->files) |
| 185 | fdt = files_fdtable(p->files); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | buffer += sprintf(buffer, |
| 187 | "FDSize:\t%d\n" |
| 188 | "Groups:\t", |
Dipankar Sarma | badf166 | 2005-09-09 13:04:10 -0700 | [diff] [blame] | 189 | fdt ? fdt->max_fds : 0); |
Dipankar Sarma | 4fb3a53 | 2005-09-16 19:28:13 -0700 | [diff] [blame] | 190 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
| 192 | group_info = p->group_info; |
| 193 | get_group_info(group_info); |
| 194 | task_unlock(p); |
| 195 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 196 | for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++) |
| 197 | buffer += sprintf(buffer, "%d ", GROUP_AT(group_info, g)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | put_group_info(group_info); |
| 199 | |
| 200 | buffer += sprintf(buffer, "\n"); |
| 201 | return buffer; |
| 202 | } |
| 203 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 204 | static char *render_sigset_t(const char *header, sigset_t *set, char *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 244 | static inline char *task_sig(struct task_struct *p, char *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | { |
Oleg Nesterov | 5e6b3f4 | 2006-10-02 02:18:52 -0700 | [diff] [blame] | 246 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Oleg Nesterov | 5e6b3f4 | 2006-10-02 02:18:52 -0700 | [diff] [blame] | 258 | rcu_read_lock(); |
| 259 | if (lock_task_sighand(p, &flags)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Oleg Nesterov | 5e6b3f4 | 2006-10-02 02:18:52 -0700 | [diff] [blame] | 267 | unlock_task_sighand(p, &flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | } |
Oleg Nesterov | 5e6b3f4 | 2006-10-02 02:18:52 -0700 | [diff] [blame] | 269 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | buffer += sprintf(buffer, "Threads:\t%d\n", num_threads); |
| 272 | buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim); |
| 273 | |
| 274 | /* render them all */ |
| 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 | |
Andrew Morgan | e338d26 | 2008-02-04 22:29:42 -0800 | [diff] [blame] | 284 | static char *render_cap_t(const char *header, kernel_cap_t *a, char *buffer) |
| 285 | { |
| 286 | unsigned __capi; |
| 287 | |
| 288 | buffer += sprintf(buffer, "%s", header); |
| 289 | CAP_FOR_EACH_U32(__capi) { |
| 290 | buffer += sprintf(buffer, "%08x", |
| 291 | a->cap[(_LINUX_CAPABILITY_U32S-1) - __capi]); |
| 292 | } |
| 293 | return buffer + sprintf(buffer, "\n"); |
| 294 | } |
| 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | static inline char *task_cap(struct task_struct *p, char *buffer) |
| 297 | { |
Andrew Morgan | e338d26 | 2008-02-04 22:29:42 -0800 | [diff] [blame] | 298 | buffer = render_cap_t("CapInh:\t", &p->cap_inheritable, buffer); |
| 299 | buffer = render_cap_t("CapPrm:\t", &p->cap_permitted, buffer); |
| 300 | return render_cap_t("CapEff:\t", &p->cap_effective, buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | } |
| 302 | |
Maxim Uvarov | b663a79 | 2007-07-15 23:40:48 -0700 | [diff] [blame] | 303 | static inline char *task_context_switch_counts(struct task_struct *p, |
| 304 | char *buffer) |
| 305 | { |
| 306 | return buffer + sprintf(buffer, "voluntary_ctxt_switches:\t%lu\n" |
| 307 | "nonvoluntary_ctxt_switches:\t%lu\n", |
| 308 | p->nvcsw, |
| 309 | p->nivcsw); |
| 310 | } |
| 311 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 312 | int proc_pid_status(struct task_struct *task, char *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | { |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 314 | char *orig = buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | struct mm_struct *mm = get_task_mm(task); |
| 316 | |
| 317 | buffer = task_name(task, buffer); |
| 318 | buffer = task_state(task, buffer); |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | if (mm) { |
| 321 | buffer = task_mem(mm, buffer); |
| 322 | mmput(mm); |
| 323 | } |
| 324 | buffer = task_sig(task, buffer); |
| 325 | buffer = task_cap(task, buffer); |
| 326 | buffer = cpuset_task_status_allowed(task, buffer); |
Martin Schwidefsky | 347a8dc | 2006-01-06 00:19:28 -0800 | [diff] [blame] | 327 | #if defined(CONFIG_S390) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | buffer = task_show_regs(task, buffer); |
| 329 | #endif |
Maxim Uvarov | b663a79 | 2007-07-15 23:40:48 -0700 | [diff] [blame] | 330 | buffer = task_context_switch_counts(task, buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | return buffer - orig; |
| 332 | } |
| 333 | |
Christian Borntraeger | efe567f | 2007-08-23 15:18:02 +0200 | [diff] [blame] | 334 | /* |
| 335 | * Use precise platform statistics if available: |
| 336 | */ |
| 337 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
| 338 | static cputime_t task_utime(struct task_struct *p) |
| 339 | { |
| 340 | return p->utime; |
| 341 | } |
| 342 | |
| 343 | static cputime_t task_stime(struct task_struct *p) |
| 344 | { |
| 345 | return p->stime; |
| 346 | } |
| 347 | #else |
| 348 | static cputime_t task_utime(struct task_struct *p) |
Ingo Molnar | b27f03d | 2007-07-09 18:51:59 +0200 | [diff] [blame] | 349 | { |
| 350 | clock_t utime = cputime_to_clock_t(p->utime), |
| 351 | total = utime + cputime_to_clock_t(p->stime); |
| 352 | u64 temp; |
| 353 | |
| 354 | /* |
| 355 | * Use CFS's precise accounting: |
| 356 | */ |
| 357 | temp = (u64)nsec_to_clock_t(p->se.sum_exec_runtime); |
| 358 | |
| 359 | if (total) { |
| 360 | temp *= utime; |
| 361 | do_div(temp, total); |
| 362 | } |
| 363 | utime = (clock_t)temp; |
| 364 | |
Peter Zijlstra | 73a2bcb | 2007-10-29 21:18:11 +0100 | [diff] [blame] | 365 | p->prev_utime = max(p->prev_utime, clock_t_to_cputime(utime)); |
| 366 | return p->prev_utime; |
Ingo Molnar | b27f03d | 2007-07-09 18:51:59 +0200 | [diff] [blame] | 367 | } |
| 368 | |
Christian Borntraeger | efe567f | 2007-08-23 15:18:02 +0200 | [diff] [blame] | 369 | static cputime_t task_stime(struct task_struct *p) |
Ingo Molnar | b27f03d | 2007-07-09 18:51:59 +0200 | [diff] [blame] | 370 | { |
Ingo Molnar | 5926c50 | 2007-07-16 09:46:30 +0200 | [diff] [blame] | 371 | clock_t stime; |
Ingo Molnar | b27f03d | 2007-07-09 18:51:59 +0200 | [diff] [blame] | 372 | |
| 373 | /* |
| 374 | * Use CFS's precise accounting. (we subtract utime from |
| 375 | * the total, to make sure the total observed by userspace |
| 376 | * grows monotonically - apps rely on that): |
| 377 | */ |
Christian Borntraeger | efe567f | 2007-08-23 15:18:02 +0200 | [diff] [blame] | 378 | stime = nsec_to_clock_t(p->se.sum_exec_runtime) - |
| 379 | cputime_to_clock_t(task_utime(p)); |
Ingo Molnar | b27f03d | 2007-07-09 18:51:59 +0200 | [diff] [blame] | 380 | |
Ingo Molnar | 08e4570 | 2007-11-26 21:21:49 +0100 | [diff] [blame] | 381 | if (stime >= 0) |
| 382 | p->prev_stime = max(p->prev_stime, clock_t_to_cputime(stime)); |
| 383 | |
Balbir Singh | 9301899 | 2007-10-30 00:26:32 +0100 | [diff] [blame] | 384 | return p->prev_stime; |
Ingo Molnar | b27f03d | 2007-07-09 18:51:59 +0200 | [diff] [blame] | 385 | } |
Christian Borntraeger | efe567f | 2007-08-23 15:18:02 +0200 | [diff] [blame] | 386 | #endif |
Ingo Molnar | b27f03d | 2007-07-09 18:51:59 +0200 | [diff] [blame] | 387 | |
Laurent Vivier | 9ac5231 | 2007-10-15 17:00:19 +0200 | [diff] [blame] | 388 | static cputime_t task_gtime(struct task_struct *p) |
| 389 | { |
| 390 | return p->gtime; |
| 391 | } |
| 392 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 393 | static int do_task_stat(struct task_struct *task, char *buffer, int whole) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | { |
| 395 | unsigned long vsize, eip, esp, wchan = ~0UL; |
| 396 | long priority, nice; |
| 397 | int tty_pgrp = -1, tty_nr = 0; |
| 398 | sigset_t sigign, sigcatch; |
| 399 | char state; |
| 400 | int res; |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 401 | pid_t ppid = 0, pgid = -1, sid = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | int num_threads = 0; |
| 403 | struct mm_struct *mm; |
| 404 | unsigned long long start_time; |
| 405 | unsigned long cmin_flt = 0, cmaj_flt = 0; |
| 406 | unsigned long min_flt = 0, maj_flt = 0; |
Christian Borntraeger | efe567f | 2007-08-23 15:18:02 +0200 | [diff] [blame] | 407 | cputime_t cutime, cstime, utime, stime; |
Laurent Vivier | 9ac5231 | 2007-10-15 17:00:19 +0200 | [diff] [blame] | 408 | cputime_t cgtime, gtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | unsigned long rsslim = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | char tcomm[sizeof(task->comm)]; |
Oleg Nesterov | a593d6e | 2006-10-02 02:18:53 -0700 | [diff] [blame] | 411 | unsigned long flags; |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 412 | struct pid_namespace *ns; |
| 413 | |
| 414 | ns = current->nsproxy->pid_ns; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
| 416 | state = *get_task_state(task); |
| 417 | vsize = eip = esp = 0; |
| 418 | mm = get_task_mm(task); |
| 419 | if (mm) { |
| 420 | vsize = task_vsize(mm); |
| 421 | eip = KSTK_EIP(task); |
| 422 | esp = KSTK_ESP(task); |
| 423 | } |
| 424 | |
| 425 | get_task_comm(tcomm, task); |
| 426 | |
| 427 | sigemptyset(&sigign); |
| 428 | sigemptyset(&sigcatch); |
Christian Borntraeger | efe567f | 2007-08-23 15:18:02 +0200 | [diff] [blame] | 429 | cutime = cstime = utime = stime = cputime_zero; |
Laurent Vivier | 9ac5231 | 2007-10-15 17:00:19 +0200 | [diff] [blame] | 430 | cgtime = gtime = cputime_zero; |
Alan Cox | 3cfd088 | 2006-09-29 02:00:41 -0700 | [diff] [blame] | 431 | |
Oleg Nesterov | a593d6e | 2006-10-02 02:18:53 -0700 | [diff] [blame] | 432 | rcu_read_lock(); |
| 433 | if (lock_task_sighand(task, &flags)) { |
| 434 | struct signal_struct *sig = task->signal; |
Oleg Nesterov | a593d6e | 2006-10-02 02:18:53 -0700 | [diff] [blame] | 435 | |
Oleg Nesterov | 9159350 | 2006-12-08 02:36:07 -0800 | [diff] [blame] | 436 | if (sig->tty) { |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 437 | tty_pgrp = pid_nr_ns(sig->tty->pgrp, ns); |
Oleg Nesterov | 9159350 | 2006-12-08 02:36:07 -0800 | [diff] [blame] | 438 | tty_nr = new_encode_dev(tty_devnum(sig->tty)); |
Oleg Nesterov | a593d6e | 2006-10-02 02:18:53 -0700 | [diff] [blame] | 439 | } |
| 440 | |
| 441 | num_threads = atomic_read(&sig->count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | collect_sigign_sigcatch(task, &sigign, &sigcatch); |
| 443 | |
Oleg Nesterov | a593d6e | 2006-10-02 02:18:53 -0700 | [diff] [blame] | 444 | cmin_flt = sig->cmin_flt; |
| 445 | cmaj_flt = sig->cmaj_flt; |
| 446 | cutime = sig->cutime; |
| 447 | cstime = sig->cstime; |
Laurent Vivier | 9ac5231 | 2007-10-15 17:00:19 +0200 | [diff] [blame] | 448 | cgtime = sig->cgtime; |
Oleg Nesterov | a593d6e | 2006-10-02 02:18:53 -0700 | [diff] [blame] | 449 | rsslim = sig->rlim[RLIMIT_RSS].rlim_cur; |
| 450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | /* add up live thread stats at the group level */ |
| 452 | if (whole) { |
Oleg Nesterov | a593d6e | 2006-10-02 02:18:53 -0700 | [diff] [blame] | 453 | struct task_struct *t = task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | do { |
| 455 | min_flt += t->min_flt; |
| 456 | maj_flt += t->maj_flt; |
Christian Borntraeger | efe567f | 2007-08-23 15:18:02 +0200 | [diff] [blame] | 457 | utime = cputime_add(utime, task_utime(t)); |
| 458 | stime = cputime_add(stime, task_stime(t)); |
Laurent Vivier | 9ac5231 | 2007-10-15 17:00:19 +0200 | [diff] [blame] | 459 | gtime = cputime_add(gtime, task_gtime(t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | t = next_thread(t); |
| 461 | } while (t != task); |
Oleg Nesterov | a593d6e | 2006-10-02 02:18:53 -0700 | [diff] [blame] | 462 | |
| 463 | min_flt += sig->min_flt; |
| 464 | maj_flt += sig->maj_flt; |
Christian Borntraeger | efe567f | 2007-08-23 15:18:02 +0200 | [diff] [blame] | 465 | utime = cputime_add(utime, sig->utime); |
| 466 | stime = cputime_add(stime, sig->stime); |
Christian Borntraeger | f9e2629 | 2007-10-19 20:52:40 +0200 | [diff] [blame] | 467 | gtime = cputime_add(gtime, sig->gtime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } |
| 469 | |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 470 | sid = task_session_nr_ns(task, ns); |
Oleg Nesterov | a98fdce | 2008-01-15 00:02:37 +0300 | [diff] [blame] | 471 | ppid = task_tgid_nr_ns(task->real_parent, ns); |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 472 | pgid = task_pgrp_nr_ns(task, ns); |
Oleg Nesterov | a593d6e | 2006-10-02 02:18:53 -0700 | [diff] [blame] | 473 | |
| 474 | unlock_task_sighand(task, &flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | } |
Oleg Nesterov | a593d6e | 2006-10-02 02:18:53 -0700 | [diff] [blame] | 476 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 478 | if (!whole || num_threads < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | wchan = get_wchan(task); |
| 480 | if (!whole) { |
| 481 | min_flt = task->min_flt; |
| 482 | maj_flt = task->maj_flt; |
Ingo Molnar | b27f03d | 2007-07-09 18:51:59 +0200 | [diff] [blame] | 483 | utime = task_utime(task); |
| 484 | stime = task_stime(task); |
Laurent Vivier | 9ac5231 | 2007-10-15 17:00:19 +0200 | [diff] [blame] | 485 | gtime = task_gtime(task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | /* scale priority and nice values from timeslices to -20..20 */ |
| 489 | /* to make it look like a "normal" Unix priority/nice value */ |
| 490 | priority = task_prio(task); |
| 491 | nice = task_nice(task); |
| 492 | |
| 493 | /* Temporary variable needed for gcc-2.96 */ |
| 494 | /* convert timespec -> nsec*/ |
Tomas Janousek | 924b42d | 2007-07-15 23:39:42 -0700 | [diff] [blame] | 495 | start_time = |
| 496 | (unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC |
| 497 | + task->real_start_time.tv_nsec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | /* convert nsec -> ticks */ |
| 499 | start_time = nsec_to_clock_t(start_time); |
| 500 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 501 | res = sprintf(buffer, "%d (%s) %c %d %d %d %d %d %u %lu \ |
Roman Zippel | 4dee26b | 2006-03-26 01:38:10 -0800 | [diff] [blame] | 502 | %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \ |
Laurent Vivier | 9ac5231 | 2007-10-15 17:00:19 +0200 | [diff] [blame] | 503 | %lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n", |
Pavel Emelyanov | b488893 | 2007-10-18 23:40:14 -0700 | [diff] [blame] | 504 | task_pid_nr_ns(task, ns), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | tcomm, |
| 506 | state, |
| 507 | ppid, |
| 508 | pgid, |
| 509 | sid, |
| 510 | tty_nr, |
| 511 | tty_pgrp, |
| 512 | task->flags, |
| 513 | min_flt, |
| 514 | cmin_flt, |
| 515 | maj_flt, |
| 516 | cmaj_flt, |
Christian Borntraeger | efe567f | 2007-08-23 15:18:02 +0200 | [diff] [blame] | 517 | cputime_to_clock_t(utime), |
| 518 | cputime_to_clock_t(stime), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | cputime_to_clock_t(cutime), |
| 520 | cputime_to_clock_t(cstime), |
| 521 | priority, |
| 522 | nice, |
| 523 | num_threads, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | start_time, |
| 525 | vsize, |
Hugh Dickins | 4294621 | 2005-10-29 18:16:05 -0700 | [diff] [blame] | 526 | mm ? get_mm_rss(mm) : 0, |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 527 | rsslim, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | mm ? mm->start_code : 0, |
| 529 | mm ? mm->end_code : 0, |
| 530 | mm ? mm->start_stack : 0, |
| 531 | esp, |
| 532 | eip, |
| 533 | /* The signal information here is obsolete. |
| 534 | * It must be decimal for Linux 2.0 compatibility. |
| 535 | * Use /proc/#/status for real-time signals. |
| 536 | */ |
| 537 | task->pending.signal.sig[0] & 0x7fffffffUL, |
| 538 | task->blocked.sig[0] & 0x7fffffffUL, |
| 539 | sigign .sig[0] & 0x7fffffffUL, |
| 540 | sigcatch .sig[0] & 0x7fffffffUL, |
| 541 | wchan, |
| 542 | 0UL, |
| 543 | 0UL, |
| 544 | task->exit_signal, |
| 545 | task_cpu(task), |
| 546 | task->rt_priority, |
Shailabh Nagar | 2589045 | 2006-07-14 00:24:43 -0700 | [diff] [blame] | 547 | task->policy, |
Laurent Vivier | 9ac5231 | 2007-10-15 17:00:19 +0200 | [diff] [blame] | 548 | (unsigned long long)delayacct_blkio_ticks(task), |
| 549 | cputime_to_clock_t(gtime), |
| 550 | cputime_to_clock_t(cgtime)); |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 551 | if (mm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | mmput(mm); |
| 553 | return res; |
| 554 | } |
| 555 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 556 | int proc_tid_stat(struct task_struct *task, char *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | { |
| 558 | return do_task_stat(task, buffer, 0); |
| 559 | } |
| 560 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 561 | int proc_tgid_stat(struct task_struct *task, char *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | { |
| 563 | return do_task_stat(task, buffer, 1); |
| 564 | } |
| 565 | |
| 566 | int proc_pid_statm(struct task_struct *task, char *buffer) |
| 567 | { |
| 568 | int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0; |
| 569 | struct mm_struct *mm = get_task_mm(task); |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | if (mm) { |
| 572 | size = task_statm(mm, &shared, &text, &data, &resident); |
| 573 | mmput(mm); |
| 574 | } |
| 575 | |
Ingo Molnar | 8ea0260 | 2007-07-16 09:46:31 +0200 | [diff] [blame] | 576 | return sprintf(buffer, "%d %d %d %d %d %d %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | size, resident, shared, text, lib, data, 0); |
| 578 | } |