Commit | Line | Data |
---|---|---|
1da177e4 LT |
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. | |
526719ba | 43 | * <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
8ea02606 IM |
65 | #include <linux/uaccess.h> |
66 | #include <linux/io.h> | |
1da177e4 LT |
67 | #include <linux/mm.h> |
68 | #include <linux/hugetlb.h> | |
69 | #include <linux/pagemap.h> | |
70 | #include <linux/swap.h> | |
1da177e4 LT |
71 | #include <linux/smp.h> |
72 | #include <linux/signal.h> | |
73 | #include <linux/highmem.h> | |
74 | #include <linux/file.h> | |
9f3acc31 | 75 | #include <linux/fdtable.h> |
1da177e4 LT |
76 | #include <linux/times.h> |
77 | #include <linux/cpuset.h> | |
4fb3a538 | 78 | #include <linux/rcupdate.h> |
25890454 | 79 | #include <linux/delayacct.h> |
ee992744 | 80 | #include <linux/seq_file.h> |
b488893a | 81 | #include <linux/pid_namespace.h> |
f83ce3e6 | 82 | #include <linux/ptrace.h> |
0d094efe | 83 | #include <linux/tracehook.h> |
ae2975bc | 84 | #include <linux/user_namespace.h> |
1da177e4 | 85 | |
1da177e4 | 86 | #include <asm/pgtable.h> |
1da177e4 LT |
87 | #include <asm/processor.h> |
88 | #include "internal.h" | |
89 | ||
df5f8314 | 90 | static inline void task_name(struct seq_file *m, struct task_struct *p) |
1da177e4 LT |
91 | { |
92 | int i; | |
df5f8314 | 93 | char *buf, *end; |
8ea02606 | 94 | char *name; |
1da177e4 LT |
95 | char tcomm[sizeof(p->comm)]; |
96 | ||
97 | get_task_comm(tcomm, p); | |
98 | ||
9d6de12f | 99 | seq_puts(m, "Name:\t"); |
df5f8314 EB |
100 | end = m->buf + m->size; |
101 | buf = m->buf + m->count; | |
1da177e4 LT |
102 | name = tcomm; |
103 | i = sizeof(tcomm); | |
df5f8314 | 104 | while (i && (buf < end)) { |
1da177e4 LT |
105 | unsigned char c = *name; |
106 | name++; | |
107 | i--; | |
108 | *buf = c; | |
109 | if (!c) | |
110 | break; | |
111 | if (c == '\\') { | |
df5f8314 EB |
112 | buf++; |
113 | if (buf < end) | |
114 | *buf++ = c; | |
1da177e4 LT |
115 | continue; |
116 | } | |
117 | if (c == '\n') { | |
df5f8314 EB |
118 | *buf++ = '\\'; |
119 | if (buf < end) | |
120 | *buf++ = 'n'; | |
1da177e4 LT |
121 | continue; |
122 | } | |
123 | buf++; | |
df5f8314 EB |
124 | } |
125 | m->count = buf - m->buf; | |
9d6de12f | 126 | seq_putc(m, '\n'); |
1da177e4 LT |
127 | } |
128 | ||
129 | /* | |
130 | * The task state array is a strange "bitmap" of | |
131 | * reasons to sleep. Thus "running" is zero, and | |
132 | * you can test for combinations of others with | |
133 | * simple bit tests. | |
134 | */ | |
e130aa70 | 135 | static const char * const task_state_array[] = { |
e1781538 PZ |
136 | "R (running)", /* 0 */ |
137 | "S (sleeping)", /* 1 */ | |
138 | "D (disk sleep)", /* 2 */ | |
139 | "T (stopped)", /* 4 */ | |
140 | "t (tracing stop)", /* 8 */ | |
ad86622b ON |
141 | "X (dead)", /* 16 */ |
142 | "Z (zombie)", /* 32 */ | |
1da177e4 LT |
143 | }; |
144 | ||
8ea02606 | 145 | static inline const char *get_task_state(struct task_struct *tsk) |
1da177e4 | 146 | { |
74e37200 | 147 | unsigned int state = (tsk->state | tsk->exit_state) & TASK_REPORT; |
1da177e4 | 148 | |
74e37200 | 149 | BUILD_BUG_ON(1 + ilog2(TASK_REPORT) != ARRAY_SIZE(task_state_array)-1); |
e1781538 | 150 | |
74e37200 | 151 | return task_state_array[fls(state)]; |
1da177e4 LT |
152 | } |
153 | ||
df5f8314 EB |
154 | static inline void task_state(struct seq_file *m, struct pid_namespace *ns, |
155 | struct pid *pid, struct task_struct *p) | |
1da177e4 | 156 | { |
e9f238c3 | 157 | struct user_namespace *user_ns = seq_user_ns(m); |
1da177e4 LT |
158 | struct group_info *group_info; |
159 | int g; | |
badf1662 | 160 | struct fdtable *fdt = NULL; |
c69e8d9c | 161 | const struct cred *cred; |
b488893a | 162 | pid_t ppid, tpid; |
1da177e4 | 163 | |
b0fa9db6 | 164 | rcu_read_lock(); |
b488893a PE |
165 | ppid = pid_alive(p) ? |
166 | task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0; | |
0d094efe RM |
167 | tpid = 0; |
168 | if (pid_alive(p)) { | |
06d98473 | 169 | struct task_struct *tracer = ptrace_parent(p); |
0d094efe RM |
170 | if (tracer) |
171 | tpid = task_pid_nr_ns(tracer, ns); | |
172 | } | |
de09a977 | 173 | cred = get_task_cred(p); |
df5f8314 | 174 | seq_printf(m, |
1da177e4 | 175 | "State:\t%s\n" |
1da177e4 | 176 | "Tgid:\t%d\n" |
e29cf08b | 177 | "Ngid:\t%d\n" |
1da177e4 LT |
178 | "Pid:\t%d\n" |
179 | "PPid:\t%d\n" | |
180 | "TracerPid:\t%d\n" | |
181 | "Uid:\t%d\t%d\t%d\t%d\n" | |
182 | "Gid:\t%d\t%d\t%d\t%d\n", | |
183 | get_task_state(p), | |
b488893a | 184 | task_tgid_nr_ns(p, ns), |
e29cf08b | 185 | task_numa_group_id(p), |
df5f8314 | 186 | pid_nr_ns(pid, ns), |
b488893a | 187 | ppid, tpid, |
dcb0f222 EB |
188 | from_kuid_munged(user_ns, cred->uid), |
189 | from_kuid_munged(user_ns, cred->euid), | |
190 | from_kuid_munged(user_ns, cred->suid), | |
191 | from_kuid_munged(user_ns, cred->fsuid), | |
192 | from_kgid_munged(user_ns, cred->gid), | |
193 | from_kgid_munged(user_ns, cred->egid), | |
194 | from_kgid_munged(user_ns, cred->sgid), | |
195 | from_kgid_munged(user_ns, cred->fsgid)); | |
b0fa9db6 | 196 | |
1da177e4 | 197 | task_lock(p); |
badf1662 DS |
198 | if (p->files) |
199 | fdt = files_fdtable(p->files); | |
df5f8314 | 200 | seq_printf(m, |
1da177e4 LT |
201 | "FDSize:\t%d\n" |
202 | "Groups:\t", | |
badf1662 | 203 | fdt ? fdt->max_fds : 0); |
4fb3a538 | 204 | rcu_read_unlock(); |
1da177e4 | 205 | |
c69e8d9c | 206 | group_info = cred->group_info; |
1da177e4 LT |
207 | task_unlock(p); |
208 | ||
8d238027 | 209 | for (g = 0; g < group_info->ngroups; g++) |
ae2975bc EB |
210 | seq_printf(m, "%d ", |
211 | from_kgid_munged(user_ns, GROUP_AT(group_info, g))); | |
c69e8d9c | 212 | put_cred(cred); |
1da177e4 | 213 | |
9d6de12f | 214 | seq_putc(m, '\n'); |
1da177e4 LT |
215 | } |
216 | ||
138d22b5 | 217 | void render_sigset_t(struct seq_file *m, const char *header, |
df5f8314 | 218 | sigset_t *set) |
1da177e4 | 219 | { |
df5f8314 | 220 | int i; |
1da177e4 | 221 | |
9d6de12f | 222 | seq_puts(m, header); |
1da177e4 LT |
223 | |
224 | i = _NSIG; | |
225 | do { | |
226 | int x = 0; | |
227 | ||
228 | i -= 4; | |
229 | if (sigismember(set, i+1)) x |= 1; | |
230 | if (sigismember(set, i+2)) x |= 2; | |
231 | if (sigismember(set, i+3)) x |= 4; | |
232 | if (sigismember(set, i+4)) x |= 8; | |
df5f8314 | 233 | seq_printf(m, "%x", x); |
1da177e4 LT |
234 | } while (i >= 4); |
235 | ||
9d6de12f | 236 | seq_putc(m, '\n'); |
1da177e4 LT |
237 | } |
238 | ||
239 | static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign, | |
240 | sigset_t *catch) | |
241 | { | |
242 | struct k_sigaction *k; | |
243 | int i; | |
244 | ||
245 | k = p->sighand->action; | |
246 | for (i = 1; i <= _NSIG; ++i, ++k) { | |
247 | if (k->sa.sa_handler == SIG_IGN) | |
248 | sigaddset(ign, i); | |
249 | else if (k->sa.sa_handler != SIG_DFL) | |
250 | sigaddset(catch, i); | |
251 | } | |
252 | } | |
253 | ||
df5f8314 | 254 | static inline void task_sig(struct seq_file *m, struct task_struct *p) |
1da177e4 | 255 | { |
5e6b3f42 | 256 | unsigned long flags; |
1da177e4 LT |
257 | sigset_t pending, shpending, blocked, ignored, caught; |
258 | int num_threads = 0; | |
259 | unsigned long qsize = 0; | |
260 | unsigned long qlim = 0; | |
261 | ||
262 | sigemptyset(&pending); | |
263 | sigemptyset(&shpending); | |
264 | sigemptyset(&blocked); | |
265 | sigemptyset(&ignored); | |
266 | sigemptyset(&caught); | |
267 | ||
5e6b3f42 | 268 | if (lock_task_sighand(p, &flags)) { |
1da177e4 LT |
269 | pending = p->pending.signal; |
270 | shpending = p->signal->shared_pending.signal; | |
271 | blocked = p->blocked; | |
272 | collect_sigign_sigcatch(p, &ignored, &caught); | |
7e49827c | 273 | num_threads = get_nr_threads(p); |
7dc52157 | 274 | rcu_read_lock(); /* FIXME: is this correct? */ |
c69e8d9c | 275 | qsize = atomic_read(&__task_cred(p)->user->sigpending); |
7dc52157 | 276 | rcu_read_unlock(); |
d554ed89 | 277 | qlim = task_rlimit(p, RLIMIT_SIGPENDING); |
5e6b3f42 | 278 | unlock_task_sighand(p, &flags); |
1da177e4 | 279 | } |
1da177e4 | 280 | |
df5f8314 EB |
281 | seq_printf(m, "Threads:\t%d\n", num_threads); |
282 | seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim); | |
1da177e4 LT |
283 | |
284 | /* render them all */ | |
df5f8314 EB |
285 | render_sigset_t(m, "SigPnd:\t", &pending); |
286 | render_sigset_t(m, "ShdPnd:\t", &shpending); | |
287 | render_sigset_t(m, "SigBlk:\t", &blocked); | |
288 | render_sigset_t(m, "SigIgn:\t", &ignored); | |
289 | render_sigset_t(m, "SigCgt:\t", &caught); | |
1da177e4 LT |
290 | } |
291 | ||
df5f8314 EB |
292 | static void render_cap_t(struct seq_file *m, const char *header, |
293 | kernel_cap_t *a) | |
e338d263 AM |
294 | { |
295 | unsigned __capi; | |
296 | ||
9d6de12f | 297 | seq_puts(m, header); |
e338d263 | 298 | CAP_FOR_EACH_U32(__capi) { |
df5f8314 | 299 | seq_printf(m, "%08x", |
ca05a99a | 300 | a->cap[(_KERNEL_CAPABILITY_U32S-1) - __capi]); |
e338d263 | 301 | } |
9d6de12f | 302 | seq_putc(m, '\n'); |
e338d263 AM |
303 | } |
304 | ||
7b9a7ec5 AV |
305 | /* Remove non-existent capabilities */ |
306 | #define NORM_CAPS(v) (v.cap[CAP_TO_INDEX(CAP_LAST_CAP)] &= \ | |
307 | CAP_TO_MASK(CAP_LAST_CAP + 1) - 1) | |
308 | ||
df5f8314 | 309 | static inline void task_cap(struct seq_file *m, struct task_struct *p) |
1da177e4 | 310 | { |
c69e8d9c DH |
311 | const struct cred *cred; |
312 | kernel_cap_t cap_inheritable, cap_permitted, cap_effective, cap_bset; | |
b6dff3ec | 313 | |
c69e8d9c DH |
314 | rcu_read_lock(); |
315 | cred = __task_cred(p); | |
316 | cap_inheritable = cred->cap_inheritable; | |
317 | cap_permitted = cred->cap_permitted; | |
318 | cap_effective = cred->cap_effective; | |
319 | cap_bset = cred->cap_bset; | |
320 | rcu_read_unlock(); | |
321 | ||
7b9a7ec5 AV |
322 | NORM_CAPS(cap_inheritable); |
323 | NORM_CAPS(cap_permitted); | |
324 | NORM_CAPS(cap_effective); | |
325 | NORM_CAPS(cap_bset); | |
326 | ||
c69e8d9c DH |
327 | render_cap_t(m, "CapInh:\t", &cap_inheritable); |
328 | render_cap_t(m, "CapPrm:\t", &cap_permitted); | |
329 | render_cap_t(m, "CapEff:\t", &cap_effective); | |
330 | render_cap_t(m, "CapBnd:\t", &cap_bset); | |
1da177e4 LT |
331 | } |
332 | ||
2f4b3bf6 KC |
333 | static inline void task_seccomp(struct seq_file *m, struct task_struct *p) |
334 | { | |
335 | #ifdef CONFIG_SECCOMP | |
336 | seq_printf(m, "Seccomp:\t%d\n", p->seccomp.mode); | |
337 | #endif | |
338 | } | |
339 | ||
df5f8314 EB |
340 | static inline void task_context_switch_counts(struct seq_file *m, |
341 | struct task_struct *p) | |
b663a79c | 342 | { |
df5f8314 EB |
343 | seq_printf(m, "voluntary_ctxt_switches:\t%lu\n" |
344 | "nonvoluntary_ctxt_switches:\t%lu\n", | |
345 | p->nvcsw, | |
346 | p->nivcsw); | |
b663a79c MU |
347 | } |
348 | ||
d01d4827 HC |
349 | static void task_cpus_allowed(struct seq_file *m, struct task_struct *task) |
350 | { | |
9d6de12f | 351 | seq_puts(m, "Cpus_allowed:\t"); |
d01d4827 | 352 | seq_cpumask(m, &task->cpus_allowed); |
9d6de12f AD |
353 | seq_putc(m, '\n'); |
354 | seq_puts(m, "Cpus_allowed_list:\t"); | |
d01d4827 | 355 | seq_cpumask_list(m, &task->cpus_allowed); |
9d6de12f | 356 | seq_putc(m, '\n'); |
d01d4827 HC |
357 | } |
358 | ||
df5f8314 EB |
359 | int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, |
360 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 361 | { |
1da177e4 LT |
362 | struct mm_struct *mm = get_task_mm(task); |
363 | ||
df5f8314 EB |
364 | task_name(m, task); |
365 | task_state(m, ns, pid, task); | |
8ea02606 | 366 | |
1da177e4 | 367 | if (mm) { |
df5f8314 | 368 | task_mem(m, mm); |
1da177e4 LT |
369 | mmput(mm); |
370 | } | |
df5f8314 EB |
371 | task_sig(m, task); |
372 | task_cap(m, task); | |
2f4b3bf6 | 373 | task_seccomp(m, task); |
d01d4827 | 374 | task_cpus_allowed(m, task); |
df5f8314 | 375 | cpuset_task_status_allowed(m, task); |
df5f8314 EB |
376 | task_context_switch_counts(m, task); |
377 | return 0; | |
1da177e4 LT |
378 | } |
379 | ||
ee992744 EB |
380 | static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, |
381 | struct pid *pid, struct task_struct *task, int whole) | |
1da177e4 LT |
382 | { |
383 | unsigned long vsize, eip, esp, wchan = ~0UL; | |
715be1fc | 384 | int priority, nice; |
1da177e4 LT |
385 | int tty_pgrp = -1, tty_nr = 0; |
386 | sigset_t sigign, sigcatch; | |
387 | char state; | |
8ea02606 | 388 | pid_t ppid = 0, pgid = -1, sid = -1; |
1da177e4 | 389 | int num_threads = 0; |
f83ce3e6 | 390 | int permitted; |
1da177e4 LT |
391 | struct mm_struct *mm; |
392 | unsigned long long start_time; | |
393 | unsigned long cmin_flt = 0, cmaj_flt = 0; | |
394 | unsigned long min_flt = 0, maj_flt = 0; | |
efe567fc | 395 | cputime_t cutime, cstime, utime, stime; |
9ac52315 | 396 | cputime_t cgtime, gtime; |
1da177e4 | 397 | unsigned long rsslim = 0; |
1da177e4 | 398 | char tcomm[sizeof(task->comm)]; |
a593d6ed | 399 | unsigned long flags; |
1da177e4 LT |
400 | |
401 | state = *get_task_state(task); | |
402 | vsize = eip = esp = 0; | |
69f594a3 | 403 | permitted = ptrace_may_access(task, PTRACE_MODE_READ | PTRACE_MODE_NOAUDIT); |
1da177e4 LT |
404 | mm = get_task_mm(task); |
405 | if (mm) { | |
406 | vsize = task_vsize(mm); | |
f83ce3e6 JE |
407 | if (permitted) { |
408 | eip = KSTK_EIP(task); | |
409 | esp = KSTK_ESP(task); | |
410 | } | |
1da177e4 LT |
411 | } |
412 | ||
413 | get_task_comm(tcomm, task); | |
414 | ||
415 | sigemptyset(&sigign); | |
416 | sigemptyset(&sigcatch); | |
64861634 MS |
417 | cutime = cstime = utime = stime = 0; |
418 | cgtime = gtime = 0; | |
3cfd0885 | 419 | |
a593d6ed ON |
420 | if (lock_task_sighand(task, &flags)) { |
421 | struct signal_struct *sig = task->signal; | |
91593504 ON |
422 | |
423 | if (sig->tty) { | |
5d0fdf1e AC |
424 | struct pid *pgrp = tty_get_pgrp(sig->tty); |
425 | tty_pgrp = pid_nr_ns(pgrp, ns); | |
426 | put_pid(pgrp); | |
91593504 | 427 | tty_nr = new_encode_dev(tty_devnum(sig->tty)); |
a593d6ed ON |
428 | } |
429 | ||
7e49827c | 430 | num_threads = get_nr_threads(task); |
1da177e4 LT |
431 | collect_sigign_sigcatch(task, &sigign, &sigcatch); |
432 | ||
a593d6ed ON |
433 | cmin_flt = sig->cmin_flt; |
434 | cmaj_flt = sig->cmaj_flt; | |
435 | cutime = sig->cutime; | |
436 | cstime = sig->cstime; | |
9ac52315 | 437 | cgtime = sig->cgtime; |
d554ed89 | 438 | rsslim = ACCESS_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur); |
a593d6ed | 439 | |
1da177e4 LT |
440 | /* add up live thread stats at the group level */ |
441 | if (whole) { | |
a593d6ed | 442 | struct task_struct *t = task; |
1da177e4 LT |
443 | do { |
444 | min_flt += t->min_flt; | |
445 | maj_flt += t->maj_flt; | |
6fac4829 | 446 | gtime += task_gtime(t); |
185ee40e | 447 | } while_each_thread(task, t); |
1da177e4 | 448 | |
a593d6ed ON |
449 | min_flt += sig->min_flt; |
450 | maj_flt += sig->maj_flt; | |
e80d0a1a | 451 | thread_group_cputime_adjusted(task, &utime, &stime); |
64861634 | 452 | gtime += sig->gtime; |
1da177e4 | 453 | } |
a593d6ed | 454 | |
b488893a | 455 | sid = task_session_nr_ns(task, ns); |
a98fdcef | 456 | ppid = task_tgid_nr_ns(task->real_parent, ns); |
b488893a | 457 | pgid = task_pgrp_nr_ns(task, ns); |
a593d6ed ON |
458 | |
459 | unlock_task_sighand(task, &flags); | |
1da177e4 | 460 | } |
1da177e4 | 461 | |
f83ce3e6 | 462 | if (permitted && (!whole || num_threads < 2)) |
1da177e4 LT |
463 | wchan = get_wchan(task); |
464 | if (!whole) { | |
465 | min_flt = task->min_flt; | |
466 | maj_flt = task->maj_flt; | |
e80d0a1a | 467 | task_cputime_adjusted(task, &utime, &stime); |
6fac4829 | 468 | gtime = task_gtime(task); |
1da177e4 LT |
469 | } |
470 | ||
471 | /* scale priority and nice values from timeslices to -20..20 */ | |
472 | /* to make it look like a "normal" Unix priority/nice value */ | |
473 | priority = task_prio(task); | |
474 | nice = task_nice(task); | |
475 | ||
476 | /* Temporary variable needed for gcc-2.96 */ | |
477 | /* convert timespec -> nsec*/ | |
924b42d5 TJ |
478 | start_time = |
479 | (unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC | |
480 | + task->real_start_time.tv_nsec; | |
1da177e4 LT |
481 | /* convert nsec -> ticks */ |
482 | start_time = nsec_to_clock_t(start_time); | |
483 | ||
bda7bad6 KH |
484 | seq_printf(m, "%d (%s) %c", pid_nr_ns(pid, ns), tcomm, state); |
485 | seq_put_decimal_ll(m, ' ', ppid); | |
486 | seq_put_decimal_ll(m, ' ', pgid); | |
487 | seq_put_decimal_ll(m, ' ', sid); | |
488 | seq_put_decimal_ll(m, ' ', tty_nr); | |
489 | seq_put_decimal_ll(m, ' ', tty_pgrp); | |
490 | seq_put_decimal_ull(m, ' ', task->flags); | |
491 | seq_put_decimal_ull(m, ' ', min_flt); | |
492 | seq_put_decimal_ull(m, ' ', cmin_flt); | |
493 | seq_put_decimal_ull(m, ' ', maj_flt); | |
494 | seq_put_decimal_ull(m, ' ', cmaj_flt); | |
495 | seq_put_decimal_ull(m, ' ', cputime_to_clock_t(utime)); | |
496 | seq_put_decimal_ull(m, ' ', cputime_to_clock_t(stime)); | |
497 | seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cutime)); | |
498 | seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cstime)); | |
499 | seq_put_decimal_ll(m, ' ', priority); | |
500 | seq_put_decimal_ll(m, ' ', nice); | |
501 | seq_put_decimal_ll(m, ' ', num_threads); | |
502 | seq_put_decimal_ull(m, ' ', 0); | |
503 | seq_put_decimal_ull(m, ' ', start_time); | |
504 | seq_put_decimal_ull(m, ' ', vsize); | |
715be1fc | 505 | seq_put_decimal_ull(m, ' ', mm ? get_mm_rss(mm) : 0); |
bda7bad6 KH |
506 | seq_put_decimal_ull(m, ' ', rsslim); |
507 | seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->start_code : 1) : 0); | |
508 | seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->end_code : 1) : 0); | |
509 | seq_put_decimal_ull(m, ' ', (permitted && mm) ? mm->start_stack : 0); | |
510 | seq_put_decimal_ull(m, ' ', esp); | |
511 | seq_put_decimal_ull(m, ' ', eip); | |
512 | /* The signal information here is obsolete. | |
513 | * It must be decimal for Linux 2.0 compatibility. | |
514 | * Use /proc/#/status for real-time signals. | |
515 | */ | |
516 | seq_put_decimal_ull(m, ' ', task->pending.signal.sig[0] & 0x7fffffffUL); | |
517 | seq_put_decimal_ull(m, ' ', task->blocked.sig[0] & 0x7fffffffUL); | |
518 | seq_put_decimal_ull(m, ' ', sigign.sig[0] & 0x7fffffffUL); | |
519 | seq_put_decimal_ull(m, ' ', sigcatch.sig[0] & 0x7fffffffUL); | |
520 | seq_put_decimal_ull(m, ' ', wchan); | |
521 | seq_put_decimal_ull(m, ' ', 0); | |
522 | seq_put_decimal_ull(m, ' ', 0); | |
523 | seq_put_decimal_ll(m, ' ', task->exit_signal); | |
524 | seq_put_decimal_ll(m, ' ', task_cpu(task)); | |
525 | seq_put_decimal_ull(m, ' ', task->rt_priority); | |
526 | seq_put_decimal_ull(m, ' ', task->policy); | |
527 | seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task)); | |
528 | seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime)); | |
529 | seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime)); | |
5b172087 CG |
530 | |
531 | if (mm && permitted) { | |
532 | seq_put_decimal_ull(m, ' ', mm->start_data); | |
533 | seq_put_decimal_ull(m, ' ', mm->end_data); | |
534 | seq_put_decimal_ull(m, ' ', mm->start_brk); | |
535 | seq_put_decimal_ull(m, ' ', mm->arg_start); | |
536 | seq_put_decimal_ull(m, ' ', mm->arg_end); | |
537 | seq_put_decimal_ull(m, ' ', mm->env_start); | |
538 | seq_put_decimal_ull(m, ' ', mm->env_end); | |
539 | } else | |
540 | seq_printf(m, " 0 0 0 0 0 0 0"); | |
541 | ||
542 | if (permitted) | |
543 | seq_put_decimal_ll(m, ' ', task->exit_code); | |
544 | else | |
545 | seq_put_decimal_ll(m, ' ', 0); | |
546 | ||
bda7bad6 | 547 | seq_putc(m, '\n'); |
8ea02606 | 548 | if (mm) |
1da177e4 | 549 | mmput(mm); |
ee992744 | 550 | return 0; |
1da177e4 LT |
551 | } |
552 | ||
ee992744 EB |
553 | int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns, |
554 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 555 | { |
ee992744 | 556 | return do_task_stat(m, ns, pid, task, 0); |
1da177e4 LT |
557 | } |
558 | ||
ee992744 EB |
559 | int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, |
560 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 561 | { |
ee992744 | 562 | return do_task_stat(m, ns, pid, task, 1); |
1da177e4 LT |
563 | } |
564 | ||
a56d3fc7 EB |
565 | int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, |
566 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 567 | { |
a2ade7b6 | 568 | unsigned long size = 0, resident = 0, shared = 0, text = 0, data = 0; |
1da177e4 | 569 | struct mm_struct *mm = get_task_mm(task); |
8ea02606 | 570 | |
1da177e4 LT |
571 | if (mm) { |
572 | size = task_statm(mm, &shared, &text, &data, &resident); | |
573 | mmput(mm); | |
574 | } | |
bda7bad6 KH |
575 | /* |
576 | * For quick read, open code by putting numbers directly | |
577 | * expected format is | |
578 | * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n", | |
579 | * size, resident, shared, text, data); | |
580 | */ | |
581 | seq_put_decimal_ull(m, 0, size); | |
582 | seq_put_decimal_ull(m, ' ', resident); | |
583 | seq_put_decimal_ull(m, ' ', shared); | |
584 | seq_put_decimal_ull(m, ' ', text); | |
585 | seq_put_decimal_ull(m, ' ', 0); | |
3748b2f1 | 586 | seq_put_decimal_ull(m, ' ', data); |
bda7bad6 KH |
587 | seq_put_decimal_ull(m, ' ', 0); |
588 | seq_putc(m, '\n'); | |
1da177e4 | 589 | |
a56d3fc7 | 590 | return 0; |
1da177e4 | 591 | } |
81841161 CG |
592 | |
593 | #ifdef CONFIG_CHECKPOINT_RESTORE | |
594 | static struct pid * | |
595 | get_children_pid(struct inode *inode, struct pid *pid_prev, loff_t pos) | |
596 | { | |
597 | struct task_struct *start, *task; | |
598 | struct pid *pid = NULL; | |
599 | ||
600 | read_lock(&tasklist_lock); | |
601 | ||
602 | start = pid_task(proc_pid(inode), PIDTYPE_PID); | |
603 | if (!start) | |
604 | goto out; | |
605 | ||
606 | /* | |
607 | * Lets try to continue searching first, this gives | |
608 | * us significant speedup on children-rich processes. | |
609 | */ | |
610 | if (pid_prev) { | |
611 | task = pid_task(pid_prev, PIDTYPE_PID); | |
612 | if (task && task->real_parent == start && | |
613 | !(list_empty(&task->sibling))) { | |
614 | if (list_is_last(&task->sibling, &start->children)) | |
615 | goto out; | |
616 | task = list_first_entry(&task->sibling, | |
617 | struct task_struct, sibling); | |
618 | pid = get_pid(task_pid(task)); | |
619 | goto out; | |
620 | } | |
621 | } | |
622 | ||
623 | /* | |
624 | * Slow search case. | |
625 | * | |
626 | * We might miss some children here if children | |
627 | * are exited while we were not holding the lock, | |
628 | * but it was never promised to be accurate that | |
629 | * much. | |
630 | * | |
631 | * "Just suppose that the parent sleeps, but N children | |
632 | * exit after we printed their tids. Now the slow paths | |
633 | * skips N extra children, we miss N tasks." (c) | |
634 | * | |
635 | * So one need to stop or freeze the leader and all | |
636 | * its children to get a precise result. | |
637 | */ | |
638 | list_for_each_entry(task, &start->children, sibling) { | |
639 | if (pos-- == 0) { | |
640 | pid = get_pid(task_pid(task)); | |
641 | break; | |
642 | } | |
643 | } | |
644 | ||
645 | out: | |
646 | read_unlock(&tasklist_lock); | |
647 | return pid; | |
648 | } | |
649 | ||
650 | static int children_seq_show(struct seq_file *seq, void *v) | |
651 | { | |
652 | struct inode *inode = seq->private; | |
653 | pid_t pid; | |
654 | ||
655 | pid = pid_nr_ns(v, inode->i_sb->s_fs_info); | |
656 | return seq_printf(seq, "%d ", pid); | |
657 | } | |
658 | ||
659 | static void *children_seq_start(struct seq_file *seq, loff_t *pos) | |
660 | { | |
661 | return get_children_pid(seq->private, NULL, *pos); | |
662 | } | |
663 | ||
664 | static void *children_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
665 | { | |
666 | struct pid *pid; | |
667 | ||
668 | pid = get_children_pid(seq->private, v, *pos + 1); | |
669 | put_pid(v); | |
670 | ||
671 | ++*pos; | |
672 | return pid; | |
673 | } | |
674 | ||
675 | static void children_seq_stop(struct seq_file *seq, void *v) | |
676 | { | |
677 | put_pid(v); | |
678 | } | |
679 | ||
680 | static const struct seq_operations children_seq_ops = { | |
681 | .start = children_seq_start, | |
682 | .next = children_seq_next, | |
683 | .stop = children_seq_stop, | |
684 | .show = children_seq_show, | |
685 | }; | |
686 | ||
687 | static int children_seq_open(struct inode *inode, struct file *file) | |
688 | { | |
689 | struct seq_file *m; | |
690 | int ret; | |
691 | ||
692 | ret = seq_open(file, &children_seq_ops); | |
693 | if (ret) | |
694 | return ret; | |
695 | ||
696 | m = file->private_data; | |
697 | m->private = inode; | |
698 | ||
699 | return ret; | |
700 | } | |
701 | ||
702 | int children_seq_release(struct inode *inode, struct file *file) | |
703 | { | |
704 | seq_release(inode, file); | |
705 | return 0; | |
706 | } | |
707 | ||
708 | const struct file_operations proc_tid_children_operations = { | |
709 | .open = children_seq_open, | |
710 | .read = seq_read, | |
711 | .llseek = seq_lseek, | |
712 | .release = children_seq_release, | |
713 | }; | |
714 | #endif /* CONFIG_CHECKPOINT_RESTORE */ |