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Commit | Line | Data |
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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 */ | |
141 | "Z (zombie)", /* 16 */ | |
142 | "X (dead)", /* 32 */ | |
143 | "x (dead)", /* 64 */ | |
464763cf PZ |
144 | "K (wakekill)", /* 128 */ |
145 | "W (waking)", /* 256 */ | |
f2530dc7 | 146 | "P (parked)", /* 512 */ |
1da177e4 LT |
147 | }; |
148 | ||
8ea02606 | 149 | static inline const char *get_task_state(struct task_struct *tsk) |
1da177e4 | 150 | { |
1587e2b1 | 151 | unsigned int state = (tsk->state & TASK_REPORT) | tsk->exit_state; |
e130aa70 | 152 | const char * const *p = &task_state_array[0]; |
1da177e4 | 153 | |
e1781538 PZ |
154 | BUILD_BUG_ON(1 + ilog2(TASK_STATE_MAX) != ARRAY_SIZE(task_state_array)); |
155 | ||
1da177e4 LT |
156 | while (state) { |
157 | p++; | |
158 | state >>= 1; | |
159 | } | |
160 | return *p; | |
161 | } | |
162 | ||
df5f8314 EB |
163 | static inline void task_state(struct seq_file *m, struct pid_namespace *ns, |
164 | struct pid *pid, struct task_struct *p) | |
1da177e4 | 165 | { |
e9f238c3 | 166 | struct user_namespace *user_ns = seq_user_ns(m); |
1da177e4 LT |
167 | struct group_info *group_info; |
168 | int g; | |
badf1662 | 169 | struct fdtable *fdt = NULL; |
c69e8d9c | 170 | const struct cred *cred; |
b488893a | 171 | pid_t ppid, tpid; |
1da177e4 | 172 | |
b0fa9db6 | 173 | rcu_read_lock(); |
b488893a PE |
174 | ppid = pid_alive(p) ? |
175 | task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0; | |
0d094efe RM |
176 | tpid = 0; |
177 | if (pid_alive(p)) { | |
06d98473 | 178 | struct task_struct *tracer = ptrace_parent(p); |
0d094efe RM |
179 | if (tracer) |
180 | tpid = task_pid_nr_ns(tracer, ns); | |
181 | } | |
de09a977 | 182 | cred = get_task_cred(p); |
df5f8314 | 183 | seq_printf(m, |
1da177e4 | 184 | "State:\t%s\n" |
1da177e4 LT |
185 | "Tgid:\t%d\n" |
186 | "Pid:\t%d\n" | |
187 | "PPid:\t%d\n" | |
188 | "TracerPid:\t%d\n" | |
189 | "Uid:\t%d\t%d\t%d\t%d\n" | |
190 | "Gid:\t%d\t%d\t%d\t%d\n", | |
191 | get_task_state(p), | |
b488893a | 192 | task_tgid_nr_ns(p, ns), |
df5f8314 | 193 | pid_nr_ns(pid, ns), |
b488893a | 194 | ppid, tpid, |
dcb0f222 EB |
195 | from_kuid_munged(user_ns, cred->uid), |
196 | from_kuid_munged(user_ns, cred->euid), | |
197 | from_kuid_munged(user_ns, cred->suid), | |
198 | from_kuid_munged(user_ns, cred->fsuid), | |
199 | from_kgid_munged(user_ns, cred->gid), | |
200 | from_kgid_munged(user_ns, cred->egid), | |
201 | from_kgid_munged(user_ns, cred->sgid), | |
202 | from_kgid_munged(user_ns, cred->fsgid)); | |
b0fa9db6 | 203 | |
1da177e4 | 204 | task_lock(p); |
badf1662 DS |
205 | if (p->files) |
206 | fdt = files_fdtable(p->files); | |
df5f8314 | 207 | seq_printf(m, |
1da177e4 LT |
208 | "FDSize:\t%d\n" |
209 | "Groups:\t", | |
badf1662 | 210 | fdt ? fdt->max_fds : 0); |
4fb3a538 | 211 | rcu_read_unlock(); |
1da177e4 | 212 | |
c69e8d9c | 213 | group_info = cred->group_info; |
1da177e4 LT |
214 | task_unlock(p); |
215 | ||
8d238027 | 216 | for (g = 0; g < group_info->ngroups; g++) |
ae2975bc EB |
217 | seq_printf(m, "%d ", |
218 | from_kgid_munged(user_ns, GROUP_AT(group_info, g))); | |
c69e8d9c | 219 | put_cred(cred); |
1da177e4 | 220 | |
9d6de12f | 221 | seq_putc(m, '\n'); |
1da177e4 LT |
222 | } |
223 | ||
138d22b5 | 224 | void render_sigset_t(struct seq_file *m, const char *header, |
df5f8314 | 225 | sigset_t *set) |
1da177e4 | 226 | { |
df5f8314 | 227 | int i; |
1da177e4 | 228 | |
9d6de12f | 229 | seq_puts(m, header); |
1da177e4 LT |
230 | |
231 | i = _NSIG; | |
232 | do { | |
233 | int x = 0; | |
234 | ||
235 | i -= 4; | |
236 | if (sigismember(set, i+1)) x |= 1; | |
237 | if (sigismember(set, i+2)) x |= 2; | |
238 | if (sigismember(set, i+3)) x |= 4; | |
239 | if (sigismember(set, i+4)) x |= 8; | |
df5f8314 | 240 | seq_printf(m, "%x", x); |
1da177e4 LT |
241 | } while (i >= 4); |
242 | ||
9d6de12f | 243 | seq_putc(m, '\n'); |
1da177e4 LT |
244 | } |
245 | ||
246 | static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign, | |
247 | sigset_t *catch) | |
248 | { | |
249 | struct k_sigaction *k; | |
250 | int i; | |
251 | ||
252 | k = p->sighand->action; | |
253 | for (i = 1; i <= _NSIG; ++i, ++k) { | |
254 | if (k->sa.sa_handler == SIG_IGN) | |
255 | sigaddset(ign, i); | |
256 | else if (k->sa.sa_handler != SIG_DFL) | |
257 | sigaddset(catch, i); | |
258 | } | |
259 | } | |
260 | ||
df5f8314 | 261 | static inline void task_sig(struct seq_file *m, struct task_struct *p) |
1da177e4 | 262 | { |
5e6b3f42 | 263 | unsigned long flags; |
1da177e4 LT |
264 | sigset_t pending, shpending, blocked, ignored, caught; |
265 | int num_threads = 0; | |
266 | unsigned long qsize = 0; | |
267 | unsigned long qlim = 0; | |
268 | ||
269 | sigemptyset(&pending); | |
270 | sigemptyset(&shpending); | |
271 | sigemptyset(&blocked); | |
272 | sigemptyset(&ignored); | |
273 | sigemptyset(&caught); | |
274 | ||
5e6b3f42 | 275 | if (lock_task_sighand(p, &flags)) { |
1da177e4 LT |
276 | pending = p->pending.signal; |
277 | shpending = p->signal->shared_pending.signal; | |
278 | blocked = p->blocked; | |
279 | collect_sigign_sigcatch(p, &ignored, &caught); | |
7e49827c | 280 | num_threads = get_nr_threads(p); |
7dc52157 | 281 | rcu_read_lock(); /* FIXME: is this correct? */ |
c69e8d9c | 282 | qsize = atomic_read(&__task_cred(p)->user->sigpending); |
7dc52157 | 283 | rcu_read_unlock(); |
d554ed89 | 284 | qlim = task_rlimit(p, RLIMIT_SIGPENDING); |
5e6b3f42 | 285 | unlock_task_sighand(p, &flags); |
1da177e4 | 286 | } |
1da177e4 | 287 | |
df5f8314 EB |
288 | seq_printf(m, "Threads:\t%d\n", num_threads); |
289 | seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim); | |
1da177e4 LT |
290 | |
291 | /* render them all */ | |
df5f8314 EB |
292 | render_sigset_t(m, "SigPnd:\t", &pending); |
293 | render_sigset_t(m, "ShdPnd:\t", &shpending); | |
294 | render_sigset_t(m, "SigBlk:\t", &blocked); | |
295 | render_sigset_t(m, "SigIgn:\t", &ignored); | |
296 | render_sigset_t(m, "SigCgt:\t", &caught); | |
1da177e4 LT |
297 | } |
298 | ||
df5f8314 EB |
299 | static void render_cap_t(struct seq_file *m, const char *header, |
300 | kernel_cap_t *a) | |
e338d263 AM |
301 | { |
302 | unsigned __capi; | |
303 | ||
9d6de12f | 304 | seq_puts(m, header); |
e338d263 | 305 | CAP_FOR_EACH_U32(__capi) { |
df5f8314 | 306 | seq_printf(m, "%08x", |
ca05a99a | 307 | a->cap[(_KERNEL_CAPABILITY_U32S-1) - __capi]); |
e338d263 | 308 | } |
9d6de12f | 309 | seq_putc(m, '\n'); |
e338d263 AM |
310 | } |
311 | ||
7b9a7ec5 AV |
312 | /* Remove non-existent capabilities */ |
313 | #define NORM_CAPS(v) (v.cap[CAP_TO_INDEX(CAP_LAST_CAP)] &= \ | |
314 | CAP_TO_MASK(CAP_LAST_CAP + 1) - 1) | |
315 | ||
df5f8314 | 316 | static inline void task_cap(struct seq_file *m, struct task_struct *p) |
1da177e4 | 317 | { |
c69e8d9c DH |
318 | const struct cred *cred; |
319 | kernel_cap_t cap_inheritable, cap_permitted, cap_effective, cap_bset; | |
b6dff3ec | 320 | |
c69e8d9c DH |
321 | rcu_read_lock(); |
322 | cred = __task_cred(p); | |
323 | cap_inheritable = cred->cap_inheritable; | |
324 | cap_permitted = cred->cap_permitted; | |
325 | cap_effective = cred->cap_effective; | |
326 | cap_bset = cred->cap_bset; | |
327 | rcu_read_unlock(); | |
328 | ||
7b9a7ec5 AV |
329 | NORM_CAPS(cap_inheritable); |
330 | NORM_CAPS(cap_permitted); | |
331 | NORM_CAPS(cap_effective); | |
332 | NORM_CAPS(cap_bset); | |
333 | ||
c69e8d9c DH |
334 | render_cap_t(m, "CapInh:\t", &cap_inheritable); |
335 | render_cap_t(m, "CapPrm:\t", &cap_permitted); | |
336 | render_cap_t(m, "CapEff:\t", &cap_effective); | |
337 | render_cap_t(m, "CapBnd:\t", &cap_bset); | |
1da177e4 LT |
338 | } |
339 | ||
2f4b3bf6 KC |
340 | static inline void task_seccomp(struct seq_file *m, struct task_struct *p) |
341 | { | |
342 | #ifdef CONFIG_SECCOMP | |
343 | seq_printf(m, "Seccomp:\t%d\n", p->seccomp.mode); | |
344 | #endif | |
345 | } | |
346 | ||
df5f8314 EB |
347 | static inline void task_context_switch_counts(struct seq_file *m, |
348 | struct task_struct *p) | |
b663a79c | 349 | { |
df5f8314 EB |
350 | seq_printf(m, "voluntary_ctxt_switches:\t%lu\n" |
351 | "nonvoluntary_ctxt_switches:\t%lu\n", | |
352 | p->nvcsw, | |
353 | p->nivcsw); | |
b663a79c MU |
354 | } |
355 | ||
d01d4827 HC |
356 | static void task_cpus_allowed(struct seq_file *m, struct task_struct *task) |
357 | { | |
9d6de12f | 358 | seq_puts(m, "Cpus_allowed:\t"); |
d01d4827 | 359 | seq_cpumask(m, &task->cpus_allowed); |
9d6de12f AD |
360 | seq_putc(m, '\n'); |
361 | seq_puts(m, "Cpus_allowed_list:\t"); | |
d01d4827 | 362 | seq_cpumask_list(m, &task->cpus_allowed); |
9d6de12f | 363 | seq_putc(m, '\n'); |
d01d4827 HC |
364 | } |
365 | ||
df5f8314 EB |
366 | int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, |
367 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 368 | { |
1da177e4 LT |
369 | struct mm_struct *mm = get_task_mm(task); |
370 | ||
df5f8314 EB |
371 | task_name(m, task); |
372 | task_state(m, ns, pid, task); | |
8ea02606 | 373 | |
1da177e4 | 374 | if (mm) { |
df5f8314 | 375 | task_mem(m, mm); |
1da177e4 LT |
376 | mmput(mm); |
377 | } | |
df5f8314 EB |
378 | task_sig(m, task); |
379 | task_cap(m, task); | |
2f4b3bf6 | 380 | task_seccomp(m, task); |
d01d4827 | 381 | task_cpus_allowed(m, task); |
df5f8314 | 382 | cpuset_task_status_allowed(m, task); |
df5f8314 EB |
383 | task_context_switch_counts(m, task); |
384 | return 0; | |
1da177e4 LT |
385 | } |
386 | ||
ee992744 EB |
387 | static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, |
388 | struct pid *pid, struct task_struct *task, int whole) | |
1da177e4 LT |
389 | { |
390 | unsigned long vsize, eip, esp, wchan = ~0UL; | |
715be1fc | 391 | int priority, nice; |
1da177e4 LT |
392 | int tty_pgrp = -1, tty_nr = 0; |
393 | sigset_t sigign, sigcatch; | |
394 | char state; | |
8ea02606 | 395 | pid_t ppid = 0, pgid = -1, sid = -1; |
1da177e4 | 396 | int num_threads = 0; |
f83ce3e6 | 397 | int permitted; |
1da177e4 LT |
398 | struct mm_struct *mm; |
399 | unsigned long long start_time; | |
400 | unsigned long cmin_flt = 0, cmaj_flt = 0; | |
401 | unsigned long min_flt = 0, maj_flt = 0; | |
efe567fc | 402 | cputime_t cutime, cstime, utime, stime; |
9ac52315 | 403 | cputime_t cgtime, gtime; |
1da177e4 | 404 | unsigned long rsslim = 0; |
1da177e4 | 405 | char tcomm[sizeof(task->comm)]; |
a593d6ed | 406 | unsigned long flags; |
1da177e4 LT |
407 | |
408 | state = *get_task_state(task); | |
409 | vsize = eip = esp = 0; | |
69f594a3 | 410 | permitted = ptrace_may_access(task, PTRACE_MODE_READ | PTRACE_MODE_NOAUDIT); |
1da177e4 LT |
411 | mm = get_task_mm(task); |
412 | if (mm) { | |
413 | vsize = task_vsize(mm); | |
f83ce3e6 JE |
414 | if (permitted) { |
415 | eip = KSTK_EIP(task); | |
416 | esp = KSTK_ESP(task); | |
417 | } | |
1da177e4 LT |
418 | } |
419 | ||
420 | get_task_comm(tcomm, task); | |
421 | ||
422 | sigemptyset(&sigign); | |
423 | sigemptyset(&sigcatch); | |
64861634 MS |
424 | cutime = cstime = utime = stime = 0; |
425 | cgtime = gtime = 0; | |
3cfd0885 | 426 | |
a593d6ed ON |
427 | if (lock_task_sighand(task, &flags)) { |
428 | struct signal_struct *sig = task->signal; | |
91593504 ON |
429 | |
430 | if (sig->tty) { | |
5d0fdf1e AC |
431 | struct pid *pgrp = tty_get_pgrp(sig->tty); |
432 | tty_pgrp = pid_nr_ns(pgrp, ns); | |
433 | put_pid(pgrp); | |
91593504 | 434 | tty_nr = new_encode_dev(tty_devnum(sig->tty)); |
a593d6ed ON |
435 | } |
436 | ||
7e49827c | 437 | num_threads = get_nr_threads(task); |
1da177e4 LT |
438 | collect_sigign_sigcatch(task, &sigign, &sigcatch); |
439 | ||
a593d6ed ON |
440 | cmin_flt = sig->cmin_flt; |
441 | cmaj_flt = sig->cmaj_flt; | |
442 | cutime = sig->cutime; | |
443 | cstime = sig->cstime; | |
9ac52315 | 444 | cgtime = sig->cgtime; |
d554ed89 | 445 | rsslim = ACCESS_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur); |
a593d6ed | 446 | |
1da177e4 LT |
447 | /* add up live thread stats at the group level */ |
448 | if (whole) { | |
a593d6ed | 449 | struct task_struct *t = task; |
1da177e4 LT |
450 | do { |
451 | min_flt += t->min_flt; | |
452 | maj_flt += t->maj_flt; | |
6fac4829 | 453 | gtime += task_gtime(t); |
1da177e4 LT |
454 | t = next_thread(t); |
455 | } while (t != task); | |
1da177e4 | 456 | |
a593d6ed ON |
457 | min_flt += sig->min_flt; |
458 | maj_flt += sig->maj_flt; | |
e80d0a1a | 459 | thread_group_cputime_adjusted(task, &utime, &stime); |
64861634 | 460 | gtime += sig->gtime; |
1da177e4 | 461 | } |
a593d6ed | 462 | |
b488893a | 463 | sid = task_session_nr_ns(task, ns); |
a98fdcef | 464 | ppid = task_tgid_nr_ns(task->real_parent, ns); |
b488893a | 465 | pgid = task_pgrp_nr_ns(task, ns); |
a593d6ed ON |
466 | |
467 | unlock_task_sighand(task, &flags); | |
1da177e4 | 468 | } |
1da177e4 | 469 | |
f83ce3e6 | 470 | if (permitted && (!whole || num_threads < 2)) |
1da177e4 LT |
471 | wchan = get_wchan(task); |
472 | if (!whole) { | |
473 | min_flt = task->min_flt; | |
474 | maj_flt = task->maj_flt; | |
e80d0a1a | 475 | task_cputime_adjusted(task, &utime, &stime); |
6fac4829 | 476 | gtime = task_gtime(task); |
1da177e4 LT |
477 | } |
478 | ||
479 | /* scale priority and nice values from timeslices to -20..20 */ | |
480 | /* to make it look like a "normal" Unix priority/nice value */ | |
481 | priority = task_prio(task); | |
482 | nice = task_nice(task); | |
483 | ||
484 | /* Temporary variable needed for gcc-2.96 */ | |
485 | /* convert timespec -> nsec*/ | |
924b42d5 TJ |
486 | start_time = |
487 | (unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC | |
488 | + task->real_start_time.tv_nsec; | |
1da177e4 LT |
489 | /* convert nsec -> ticks */ |
490 | start_time = nsec_to_clock_t(start_time); | |
491 | ||
bda7bad6 KH |
492 | seq_printf(m, "%d (%s) %c", pid_nr_ns(pid, ns), tcomm, state); |
493 | seq_put_decimal_ll(m, ' ', ppid); | |
494 | seq_put_decimal_ll(m, ' ', pgid); | |
495 | seq_put_decimal_ll(m, ' ', sid); | |
496 | seq_put_decimal_ll(m, ' ', tty_nr); | |
497 | seq_put_decimal_ll(m, ' ', tty_pgrp); | |
498 | seq_put_decimal_ull(m, ' ', task->flags); | |
499 | seq_put_decimal_ull(m, ' ', min_flt); | |
500 | seq_put_decimal_ull(m, ' ', cmin_flt); | |
501 | seq_put_decimal_ull(m, ' ', maj_flt); | |
502 | seq_put_decimal_ull(m, ' ', cmaj_flt); | |
503 | seq_put_decimal_ull(m, ' ', cputime_to_clock_t(utime)); | |
504 | seq_put_decimal_ull(m, ' ', cputime_to_clock_t(stime)); | |
505 | seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cutime)); | |
506 | seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cstime)); | |
507 | seq_put_decimal_ll(m, ' ', priority); | |
508 | seq_put_decimal_ll(m, ' ', nice); | |
509 | seq_put_decimal_ll(m, ' ', num_threads); | |
510 | seq_put_decimal_ull(m, ' ', 0); | |
511 | seq_put_decimal_ull(m, ' ', start_time); | |
512 | seq_put_decimal_ull(m, ' ', vsize); | |
715be1fc | 513 | seq_put_decimal_ull(m, ' ', mm ? get_mm_rss(mm) : 0); |
bda7bad6 KH |
514 | seq_put_decimal_ull(m, ' ', rsslim); |
515 | seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->start_code : 1) : 0); | |
516 | seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->end_code : 1) : 0); | |
517 | seq_put_decimal_ull(m, ' ', (permitted && mm) ? mm->start_stack : 0); | |
518 | seq_put_decimal_ull(m, ' ', esp); | |
519 | seq_put_decimal_ull(m, ' ', eip); | |
520 | /* The signal information here is obsolete. | |
521 | * It must be decimal for Linux 2.0 compatibility. | |
522 | * Use /proc/#/status for real-time signals. | |
523 | */ | |
524 | seq_put_decimal_ull(m, ' ', task->pending.signal.sig[0] & 0x7fffffffUL); | |
525 | seq_put_decimal_ull(m, ' ', task->blocked.sig[0] & 0x7fffffffUL); | |
526 | seq_put_decimal_ull(m, ' ', sigign.sig[0] & 0x7fffffffUL); | |
527 | seq_put_decimal_ull(m, ' ', sigcatch.sig[0] & 0x7fffffffUL); | |
528 | seq_put_decimal_ull(m, ' ', wchan); | |
529 | seq_put_decimal_ull(m, ' ', 0); | |
530 | seq_put_decimal_ull(m, ' ', 0); | |
531 | seq_put_decimal_ll(m, ' ', task->exit_signal); | |
532 | seq_put_decimal_ll(m, ' ', task_cpu(task)); | |
533 | seq_put_decimal_ull(m, ' ', task->rt_priority); | |
534 | seq_put_decimal_ull(m, ' ', task->policy); | |
535 | seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task)); | |
536 | seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime)); | |
537 | seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime)); | |
5b172087 CG |
538 | |
539 | if (mm && permitted) { | |
540 | seq_put_decimal_ull(m, ' ', mm->start_data); | |
541 | seq_put_decimal_ull(m, ' ', mm->end_data); | |
542 | seq_put_decimal_ull(m, ' ', mm->start_brk); | |
543 | seq_put_decimal_ull(m, ' ', mm->arg_start); | |
544 | seq_put_decimal_ull(m, ' ', mm->arg_end); | |
545 | seq_put_decimal_ull(m, ' ', mm->env_start); | |
546 | seq_put_decimal_ull(m, ' ', mm->env_end); | |
547 | } else | |
548 | seq_printf(m, " 0 0 0 0 0 0 0"); | |
549 | ||
550 | if (permitted) | |
551 | seq_put_decimal_ll(m, ' ', task->exit_code); | |
552 | else | |
553 | seq_put_decimal_ll(m, ' ', 0); | |
554 | ||
bda7bad6 | 555 | seq_putc(m, '\n'); |
8ea02606 | 556 | if (mm) |
1da177e4 | 557 | mmput(mm); |
ee992744 | 558 | return 0; |
1da177e4 LT |
559 | } |
560 | ||
ee992744 EB |
561 | int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns, |
562 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 563 | { |
ee992744 | 564 | return do_task_stat(m, ns, pid, task, 0); |
1da177e4 LT |
565 | } |
566 | ||
ee992744 EB |
567 | int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, |
568 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 569 | { |
ee992744 | 570 | return do_task_stat(m, ns, pid, task, 1); |
1da177e4 LT |
571 | } |
572 | ||
a56d3fc7 EB |
573 | int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, |
574 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 575 | { |
a2ade7b6 | 576 | unsigned long size = 0, resident = 0, shared = 0, text = 0, data = 0; |
1da177e4 | 577 | struct mm_struct *mm = get_task_mm(task); |
8ea02606 | 578 | |
1da177e4 LT |
579 | if (mm) { |
580 | size = task_statm(mm, &shared, &text, &data, &resident); | |
581 | mmput(mm); | |
582 | } | |
bda7bad6 KH |
583 | /* |
584 | * For quick read, open code by putting numbers directly | |
585 | * expected format is | |
586 | * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n", | |
587 | * size, resident, shared, text, data); | |
588 | */ | |
589 | seq_put_decimal_ull(m, 0, size); | |
590 | seq_put_decimal_ull(m, ' ', resident); | |
591 | seq_put_decimal_ull(m, ' ', shared); | |
592 | seq_put_decimal_ull(m, ' ', text); | |
593 | seq_put_decimal_ull(m, ' ', 0); | |
3748b2f1 | 594 | seq_put_decimal_ull(m, ' ', data); |
bda7bad6 KH |
595 | seq_put_decimal_ull(m, ' ', 0); |
596 | seq_putc(m, '\n'); | |
1da177e4 | 597 | |
a56d3fc7 | 598 | return 0; |
1da177e4 | 599 | } |
81841161 CG |
600 | |
601 | #ifdef CONFIG_CHECKPOINT_RESTORE | |
602 | static struct pid * | |
603 | get_children_pid(struct inode *inode, struct pid *pid_prev, loff_t pos) | |
604 | { | |
605 | struct task_struct *start, *task; | |
606 | struct pid *pid = NULL; | |
607 | ||
608 | read_lock(&tasklist_lock); | |
609 | ||
610 | start = pid_task(proc_pid(inode), PIDTYPE_PID); | |
611 | if (!start) | |
612 | goto out; | |
613 | ||
614 | /* | |
615 | * Lets try to continue searching first, this gives | |
616 | * us significant speedup on children-rich processes. | |
617 | */ | |
618 | if (pid_prev) { | |
619 | task = pid_task(pid_prev, PIDTYPE_PID); | |
620 | if (task && task->real_parent == start && | |
621 | !(list_empty(&task->sibling))) { | |
622 | if (list_is_last(&task->sibling, &start->children)) | |
623 | goto out; | |
624 | task = list_first_entry(&task->sibling, | |
625 | struct task_struct, sibling); | |
626 | pid = get_pid(task_pid(task)); | |
627 | goto out; | |
628 | } | |
629 | } | |
630 | ||
631 | /* | |
632 | * Slow search case. | |
633 | * | |
634 | * We might miss some children here if children | |
635 | * are exited while we were not holding the lock, | |
636 | * but it was never promised to be accurate that | |
637 | * much. | |
638 | * | |
639 | * "Just suppose that the parent sleeps, but N children | |
640 | * exit after we printed their tids. Now the slow paths | |
641 | * skips N extra children, we miss N tasks." (c) | |
642 | * | |
643 | * So one need to stop or freeze the leader and all | |
644 | * its children to get a precise result. | |
645 | */ | |
646 | list_for_each_entry(task, &start->children, sibling) { | |
647 | if (pos-- == 0) { | |
648 | pid = get_pid(task_pid(task)); | |
649 | break; | |
650 | } | |
651 | } | |
652 | ||
653 | out: | |
654 | read_unlock(&tasklist_lock); | |
655 | return pid; | |
656 | } | |
657 | ||
658 | static int children_seq_show(struct seq_file *seq, void *v) | |
659 | { | |
660 | struct inode *inode = seq->private; | |
661 | pid_t pid; | |
662 | ||
663 | pid = pid_nr_ns(v, inode->i_sb->s_fs_info); | |
664 | return seq_printf(seq, "%d ", pid); | |
665 | } | |
666 | ||
667 | static void *children_seq_start(struct seq_file *seq, loff_t *pos) | |
668 | { | |
669 | return get_children_pid(seq->private, NULL, *pos); | |
670 | } | |
671 | ||
672 | static void *children_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
673 | { | |
674 | struct pid *pid; | |
675 | ||
676 | pid = get_children_pid(seq->private, v, *pos + 1); | |
677 | put_pid(v); | |
678 | ||
679 | ++*pos; | |
680 | return pid; | |
681 | } | |
682 | ||
683 | static void children_seq_stop(struct seq_file *seq, void *v) | |
684 | { | |
685 | put_pid(v); | |
686 | } | |
687 | ||
688 | static const struct seq_operations children_seq_ops = { | |
689 | .start = children_seq_start, | |
690 | .next = children_seq_next, | |
691 | .stop = children_seq_stop, | |
692 | .show = children_seq_show, | |
693 | }; | |
694 | ||
695 | static int children_seq_open(struct inode *inode, struct file *file) | |
696 | { | |
697 | struct seq_file *m; | |
698 | int ret; | |
699 | ||
700 | ret = seq_open(file, &children_seq_ops); | |
701 | if (ret) | |
702 | return ret; | |
703 | ||
704 | m = file->private_data; | |
705 | m->private = inode; | |
706 | ||
707 | return ret; | |
708 | } | |
709 | ||
710 | int children_seq_release(struct inode *inode, struct file *file) | |
711 | { | |
712 | seq_release(inode, file); | |
713 | return 0; | |
714 | } | |
715 | ||
716 | const struct file_operations proc_tid_children_operations = { | |
717 | .open = children_seq_open, | |
718 | .read = seq_read, | |
719 | .llseek = seq_lseek, | |
720 | .release = children_seq_release, | |
721 | }; | |
722 | #endif /* CONFIG_CHECKPOINT_RESTORE */ |