Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/fs/proc/array.c | |
4 | * | |
5 | * Copyright (C) 1992 by Linus Torvalds | |
6 | * based on ideas by Darren Senn | |
7 | * | |
8 | * Fixes: | |
9 | * Michael. K. Johnson: stat,statm extensions. | |
10 | * <johnsonm@stolaf.edu> | |
11 | * | |
12 | * Pauline Middelink : Made cmdline,envline only break at '\0's, to | |
13 | * make sure SET_PROCTITLE works. Also removed | |
14 | * bad '!' which forced address recalculation for | |
15 | * EVERY character on the current page. | |
16 | * <middelin@polyware.iaf.nl> | |
17 | * | |
18 | * Danny ter Haar : added cpuinfo | |
19 | * <dth@cistron.nl> | |
20 | * | |
21 | * Alessandro Rubini : profile extension. | |
22 | * <rubini@ipvvis.unipv.it> | |
23 | * | |
24 | * Jeff Tranter : added BogoMips field to cpuinfo | |
25 | * <Jeff_Tranter@Mitel.COM> | |
26 | * | |
27 | * Bruno Haible : remove 4K limit for the maps file | |
28 | * <haible@ma2s2.mathematik.uni-karlsruhe.de> | |
29 | * | |
30 | * Yves Arrouye : remove removal of trailing spaces in get_array. | |
31 | * <Yves.Arrouye@marin.fdn.fr> | |
32 | * | |
33 | * Jerome Forissier : added per-CPU time information to /proc/stat | |
34 | * and /proc/<pid>/cpu extension | |
35 | * <forissier@isia.cma.fr> | |
36 | * - Incorporation and non-SMP safe operation | |
37 | * of forissier patch in 2.1.78 by | |
38 | * Hans Marcus <crowbar@concepts.nl> | |
39 | * | |
40 | * aeb@cwi.nl : /proc/partitions | |
41 | * | |
42 | * | |
43 | * Alan Cox : security fixes. | |
526719ba | 44 | * <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
45 | * |
46 | * Al Viro : safe handling of mm_struct | |
47 | * | |
48 | * Gerhard Wichert : added BIGMEM support | |
49 | * Siemens AG <Gerhard.Wichert@pdb.siemens.de> | |
50 | * | |
51 | * Al Viro & Jeff Garzik : moved most of the thing into base.c and | |
52 | * : proc_misc.c. The rest may eventually go into | |
53 | * : base.c too. | |
54 | */ | |
55 | ||
1da177e4 LT |
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> | |
6e84f315 | 64 | #include <linux/sched/mm.h> |
6a3827d7 | 65 | #include <linux/sched/numa_balancing.h> |
fd7d5627 | 66 | #include <linux/sched/task_stack.h> |
29930025 | 67 | #include <linux/sched/task.h> |
32ef5517 | 68 | #include <linux/sched/cputime.h> |
1da177e4 LT |
69 | #include <linux/proc_fs.h> |
70 | #include <linux/ioport.h> | |
8ea02606 IM |
71 | #include <linux/uaccess.h> |
72 | #include <linux/io.h> | |
1da177e4 LT |
73 | #include <linux/mm.h> |
74 | #include <linux/hugetlb.h> | |
75 | #include <linux/pagemap.h> | |
76 | #include <linux/swap.h> | |
1da177e4 LT |
77 | #include <linux/smp.h> |
78 | #include <linux/signal.h> | |
79 | #include <linux/highmem.h> | |
80 | #include <linux/file.h> | |
9f3acc31 | 81 | #include <linux/fdtable.h> |
1da177e4 LT |
82 | #include <linux/times.h> |
83 | #include <linux/cpuset.h> | |
4fb3a538 | 84 | #include <linux/rcupdate.h> |
25890454 | 85 | #include <linux/delayacct.h> |
ee992744 | 86 | #include <linux/seq_file.h> |
b488893a | 87 | #include <linux/pid_namespace.h> |
f83ce3e6 | 88 | #include <linux/ptrace.h> |
0d094efe | 89 | #include <linux/tracehook.h> |
edc924e0 | 90 | #include <linux/string_helpers.h> |
ae2975bc | 91 | #include <linux/user_namespace.h> |
3e42979e | 92 | #include <linux/fs_struct.h> |
1da177e4 | 93 | |
1da177e4 | 94 | #include <asm/pgtable.h> |
1da177e4 LT |
95 | #include <asm/processor.h> |
96 | #include "internal.h" | |
97 | ||
df5f8314 | 98 | static inline void task_name(struct seq_file *m, struct task_struct *p) |
1da177e4 | 99 | { |
edc924e0 | 100 | char *buf; |
3a49f3d2 | 101 | size_t size; |
1da177e4 | 102 | char tcomm[sizeof(p->comm)]; |
3a49f3d2 | 103 | int ret; |
1da177e4 LT |
104 | |
105 | get_task_comm(tcomm, p); | |
106 | ||
9d6de12f | 107 | seq_puts(m, "Name:\t"); |
edc924e0 | 108 | |
3a49f3d2 AS |
109 | size = seq_get_buf(m, &buf); |
110 | ret = string_escape_str(tcomm, buf, size, ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\"); | |
111 | seq_commit(m, ret < size ? ret : -1); | |
edc924e0 | 112 | |
9d6de12f | 113 | seq_putc(m, '\n'); |
1da177e4 LT |
114 | } |
115 | ||
116 | /* | |
117 | * The task state array is a strange "bitmap" of | |
118 | * reasons to sleep. Thus "running" is zero, and | |
119 | * you can test for combinations of others with | |
120 | * simple bit tests. | |
121 | */ | |
e130aa70 | 122 | static const char * const task_state_array[] = { |
06eb6184 PZ |
123 | |
124 | /* states in TASK_REPORT: */ | |
125 | "R (running)", /* 0x00 */ | |
126 | "S (sleeping)", /* 0x01 */ | |
127 | "D (disk sleep)", /* 0x02 */ | |
128 | "T (stopped)", /* 0x04 */ | |
129 | "t (tracing stop)", /* 0x08 */ | |
130 | "X (dead)", /* 0x10 */ | |
131 | "Z (zombie)", /* 0x20 */ | |
8ef9925b | 132 | "P (parked)", /* 0x40 */ |
06eb6184 PZ |
133 | |
134 | /* states beyond TASK_REPORT: */ | |
8ef9925b | 135 | "I (idle)", /* 0x80 */ |
1da177e4 LT |
136 | }; |
137 | ||
8ea02606 | 138 | static inline const char *get_task_state(struct task_struct *tsk) |
1da177e4 | 139 | { |
06eb6184 | 140 | BUILD_BUG_ON(1 + ilog2(TASK_REPORT_MAX) != ARRAY_SIZE(task_state_array)); |
1d48b080 | 141 | return task_state_array[task_state_index(tsk)]; |
1da177e4 LT |
142 | } |
143 | ||
df5f8314 EB |
144 | static inline void task_state(struct seq_file *m, struct pid_namespace *ns, |
145 | struct pid *pid, struct task_struct *p) | |
1da177e4 | 146 | { |
e9f238c3 | 147 | struct user_namespace *user_ns = seq_user_ns(m); |
1da177e4 | 148 | struct group_info *group_info; |
68c3411f | 149 | int g, umask = -1; |
abdba6e9 | 150 | struct task_struct *tracer; |
c69e8d9c | 151 | const struct cred *cred; |
abdba6e9 | 152 | pid_t ppid, tpid = 0, tgid, ngid; |
0f4a0d53 | 153 | unsigned int max_fds = 0; |
1da177e4 | 154 | |
b0fa9db6 | 155 | rcu_read_lock(); |
b488893a PE |
156 | ppid = pid_alive(p) ? |
157 | task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0; | |
abdba6e9 ON |
158 | |
159 | tracer = ptrace_parent(p); | |
160 | if (tracer) | |
161 | tpid = task_pid_nr_ns(tracer, ns); | |
b0fafc11 ON |
162 | |
163 | tgid = task_tgid_nr_ns(p, ns); | |
164 | ngid = task_numa_group_id(p); | |
de09a977 | 165 | cred = get_task_cred(p); |
0f4a0d53 ON |
166 | |
167 | task_lock(p); | |
68c3411f MG |
168 | if (p->fs) |
169 | umask = p->fs->umask; | |
0f4a0d53 ON |
170 | if (p->files) |
171 | max_fds = files_fdtable(p->files)->max_fds; | |
172 | task_unlock(p); | |
b0fafc11 | 173 | rcu_read_unlock(); |
0f4a0d53 | 174 | |
68c3411f MG |
175 | if (umask >= 0) |
176 | seq_printf(m, "Umask:\t%#04o\n", umask); | |
d0f02231 AV |
177 | seq_puts(m, "State:\t"); |
178 | seq_puts(m, get_task_state(p)); | |
f7a5f132 | 179 | |
75ba1d07 JP |
180 | seq_put_decimal_ull(m, "\nTgid:\t", tgid); |
181 | seq_put_decimal_ull(m, "\nNgid:\t", ngid); | |
182 | seq_put_decimal_ull(m, "\nPid:\t", pid_nr_ns(pid, ns)); | |
183 | seq_put_decimal_ull(m, "\nPPid:\t", ppid); | |
184 | seq_put_decimal_ull(m, "\nTracerPid:\t", tpid); | |
185 | seq_put_decimal_ull(m, "\nUid:\t", from_kuid_munged(user_ns, cred->uid)); | |
186 | seq_put_decimal_ull(m, "\t", from_kuid_munged(user_ns, cred->euid)); | |
187 | seq_put_decimal_ull(m, "\t", from_kuid_munged(user_ns, cred->suid)); | |
188 | seq_put_decimal_ull(m, "\t", from_kuid_munged(user_ns, cred->fsuid)); | |
189 | seq_put_decimal_ull(m, "\nGid:\t", from_kgid_munged(user_ns, cred->gid)); | |
190 | seq_put_decimal_ull(m, "\t", from_kgid_munged(user_ns, cred->egid)); | |
191 | seq_put_decimal_ull(m, "\t", from_kgid_munged(user_ns, cred->sgid)); | |
192 | seq_put_decimal_ull(m, "\t", from_kgid_munged(user_ns, cred->fsgid)); | |
193 | seq_put_decimal_ull(m, "\nFDSize:\t", max_fds); | |
f7a5f132 AD |
194 | |
195 | seq_puts(m, "\nGroups:\t"); | |
c69e8d9c | 196 | group_info = cred->group_info; |
8d238027 | 197 | for (g = 0; g < group_info->ngroups; g++) |
75ba1d07 | 198 | seq_put_decimal_ull(m, g ? " " : "", |
81243eac | 199 | from_kgid_munged(user_ns, group_info->gid[g])); |
c69e8d9c | 200 | put_cred(cred); |
f7a5f132 AD |
201 | /* Trailing space shouldn't have been added in the first place. */ |
202 | seq_putc(m, ' '); | |
1da177e4 | 203 | |
e4bc3324 CH |
204 | #ifdef CONFIG_PID_NS |
205 | seq_puts(m, "\nNStgid:"); | |
206 | for (g = ns->level; g <= pid->level; g++) | |
75ba1d07 | 207 | seq_put_decimal_ull(m, "\t", task_tgid_nr_ns(p, pid->numbers[g].ns)); |
e4bc3324 CH |
208 | seq_puts(m, "\nNSpid:"); |
209 | for (g = ns->level; g <= pid->level; g++) | |
75ba1d07 | 210 | seq_put_decimal_ull(m, "\t", task_pid_nr_ns(p, pid->numbers[g].ns)); |
e4bc3324 CH |
211 | seq_puts(m, "\nNSpgid:"); |
212 | for (g = ns->level; g <= pid->level; g++) | |
75ba1d07 | 213 | seq_put_decimal_ull(m, "\t", task_pgrp_nr_ns(p, pid->numbers[g].ns)); |
e4bc3324 CH |
214 | seq_puts(m, "\nNSsid:"); |
215 | for (g = ns->level; g <= pid->level; g++) | |
75ba1d07 | 216 | seq_put_decimal_ull(m, "\t", task_session_nr_ns(p, pid->numbers[g].ns)); |
e4bc3324 | 217 | #endif |
9d6de12f | 218 | seq_putc(m, '\n'); |
1da177e4 LT |
219 | } |
220 | ||
138d22b5 | 221 | void render_sigset_t(struct seq_file *m, const char *header, |
df5f8314 | 222 | sigset_t *set) |
1da177e4 | 223 | { |
df5f8314 | 224 | int i; |
1da177e4 | 225 | |
9d6de12f | 226 | seq_puts(m, header); |
1da177e4 LT |
227 | |
228 | i = _NSIG; | |
229 | do { | |
230 | int x = 0; | |
231 | ||
232 | i -= 4; | |
233 | if (sigismember(set, i+1)) x |= 1; | |
234 | if (sigismember(set, i+2)) x |= 2; | |
235 | if (sigismember(set, i+3)) x |= 4; | |
236 | if (sigismember(set, i+4)) x |= 8; | |
209b14dc | 237 | seq_putc(m, hex_asc[x]); |
1da177e4 LT |
238 | } while (i >= 4); |
239 | ||
9d6de12f | 240 | seq_putc(m, '\n'); |
1da177e4 LT |
241 | } |
242 | ||
243 | static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign, | |
244 | sigset_t *catch) | |
245 | { | |
246 | struct k_sigaction *k; | |
247 | int i; | |
248 | ||
249 | k = p->sighand->action; | |
250 | for (i = 1; i <= _NSIG; ++i, ++k) { | |
251 | if (k->sa.sa_handler == SIG_IGN) | |
252 | sigaddset(ign, i); | |
253 | else if (k->sa.sa_handler != SIG_DFL) | |
254 | sigaddset(catch, i); | |
255 | } | |
256 | } | |
257 | ||
df5f8314 | 258 | static inline void task_sig(struct seq_file *m, struct task_struct *p) |
1da177e4 | 259 | { |
5e6b3f42 | 260 | unsigned long flags; |
1da177e4 LT |
261 | sigset_t pending, shpending, blocked, ignored, caught; |
262 | int num_threads = 0; | |
263 | unsigned long qsize = 0; | |
264 | unsigned long qlim = 0; | |
265 | ||
266 | sigemptyset(&pending); | |
267 | sigemptyset(&shpending); | |
268 | sigemptyset(&blocked); | |
269 | sigemptyset(&ignored); | |
270 | sigemptyset(&caught); | |
271 | ||
5e6b3f42 | 272 | if (lock_task_sighand(p, &flags)) { |
1da177e4 LT |
273 | pending = p->pending.signal; |
274 | shpending = p->signal->shared_pending.signal; | |
275 | blocked = p->blocked; | |
276 | collect_sigign_sigcatch(p, &ignored, &caught); | |
7e49827c | 277 | num_threads = get_nr_threads(p); |
7dc52157 | 278 | rcu_read_lock(); /* FIXME: is this correct? */ |
c69e8d9c | 279 | qsize = atomic_read(&__task_cred(p)->user->sigpending); |
7dc52157 | 280 | rcu_read_unlock(); |
d554ed89 | 281 | qlim = task_rlimit(p, RLIMIT_SIGPENDING); |
5e6b3f42 | 282 | unlock_task_sighand(p, &flags); |
1da177e4 | 283 | } |
1da177e4 | 284 | |
75ba1d07 JP |
285 | seq_put_decimal_ull(m, "Threads:\t", num_threads); |
286 | seq_put_decimal_ull(m, "\nSigQ:\t", qsize); | |
287 | seq_put_decimal_ull(m, "/", qlim); | |
1da177e4 LT |
288 | |
289 | /* render them all */ | |
f7a5f132 | 290 | render_sigset_t(m, "\nSigPnd:\t", &pending); |
df5f8314 EB |
291 | render_sigset_t(m, "ShdPnd:\t", &shpending); |
292 | render_sigset_t(m, "SigBlk:\t", &blocked); | |
293 | render_sigset_t(m, "SigIgn:\t", &ignored); | |
294 | render_sigset_t(m, "SigCgt:\t", &caught); | |
1da177e4 LT |
295 | } |
296 | ||
df5f8314 EB |
297 | static void render_cap_t(struct seq_file *m, const char *header, |
298 | kernel_cap_t *a) | |
e338d263 AM |
299 | { |
300 | unsigned __capi; | |
301 | ||
9d6de12f | 302 | seq_puts(m, header); |
e338d263 | 303 | CAP_FOR_EACH_U32(__capi) { |
d0f02231 AV |
304 | seq_put_hex_ll(m, NULL, |
305 | a->cap[CAP_LAST_U32 - __capi], 8); | |
e338d263 | 306 | } |
9d6de12f | 307 | seq_putc(m, '\n'); |
e338d263 AM |
308 | } |
309 | ||
df5f8314 | 310 | static inline void task_cap(struct seq_file *m, struct task_struct *p) |
1da177e4 | 311 | { |
c69e8d9c | 312 | const struct cred *cred; |
58319057 AL |
313 | kernel_cap_t cap_inheritable, cap_permitted, cap_effective, |
314 | cap_bset, cap_ambient; | |
b6dff3ec | 315 | |
c69e8d9c DH |
316 | rcu_read_lock(); |
317 | cred = __task_cred(p); | |
318 | cap_inheritable = cred->cap_inheritable; | |
319 | cap_permitted = cred->cap_permitted; | |
320 | cap_effective = cred->cap_effective; | |
321 | cap_bset = cred->cap_bset; | |
58319057 | 322 | cap_ambient = cred->cap_ambient; |
c69e8d9c DH |
323 | rcu_read_unlock(); |
324 | ||
325 | render_cap_t(m, "CapInh:\t", &cap_inheritable); | |
326 | render_cap_t(m, "CapPrm:\t", &cap_permitted); | |
327 | render_cap_t(m, "CapEff:\t", &cap_effective); | |
328 | render_cap_t(m, "CapBnd:\t", &cap_bset); | |
58319057 | 329 | render_cap_t(m, "CapAmb:\t", &cap_ambient); |
1da177e4 LT |
330 | } |
331 | ||
2f4b3bf6 KC |
332 | static inline void task_seccomp(struct seq_file *m, struct task_struct *p) |
333 | { | |
af884cd4 | 334 | seq_put_decimal_ull(m, "NoNewPrivs:\t", task_no_new_privs(p)); |
2f4b3bf6 | 335 | #ifdef CONFIG_SECCOMP |
af884cd4 | 336 | seq_put_decimal_ull(m, "\nSeccomp:\t", p->seccomp.mode); |
2f4b3bf6 | 337 | #endif |
af884cd4 | 338 | seq_putc(m, '\n'); |
2f4b3bf6 KC |
339 | } |
340 | ||
df5f8314 EB |
341 | static inline void task_context_switch_counts(struct seq_file *m, |
342 | struct task_struct *p) | |
b663a79c | 343 | { |
75ba1d07 JP |
344 | seq_put_decimal_ull(m, "voluntary_ctxt_switches:\t", p->nvcsw); |
345 | seq_put_decimal_ull(m, "\nnonvoluntary_ctxt_switches:\t", p->nivcsw); | |
f7a5f132 | 346 | seq_putc(m, '\n'); |
b663a79c MU |
347 | } |
348 | ||
d01d4827 HC |
349 | static void task_cpus_allowed(struct seq_file *m, struct task_struct *task) |
350 | { | |
a0c2e07d TH |
351 | seq_printf(m, "Cpus_allowed:\t%*pb\n", |
352 | cpumask_pr_args(&task->cpus_allowed)); | |
353 | seq_printf(m, "Cpus_allowed_list:\t%*pbl\n", | |
354 | cpumask_pr_args(&task->cpus_allowed)); | |
d01d4827 HC |
355 | } |
356 | ||
c6434012 RG |
357 | static inline void task_core_dumping(struct seq_file *m, struct mm_struct *mm) |
358 | { | |
d0f02231 AV |
359 | seq_put_decimal_ull(m, "CoreDumping:\t", !!mm->core_state); |
360 | seq_putc(m, '\n'); | |
c6434012 RG |
361 | } |
362 | ||
df5f8314 EB |
363 | int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, |
364 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 365 | { |
1da177e4 LT |
366 | struct mm_struct *mm = get_task_mm(task); |
367 | ||
df5f8314 EB |
368 | task_name(m, task); |
369 | task_state(m, ns, pid, task); | |
8ea02606 | 370 | |
1da177e4 | 371 | if (mm) { |
df5f8314 | 372 | task_mem(m, mm); |
c6434012 | 373 | task_core_dumping(m, mm); |
1da177e4 LT |
374 | mmput(mm); |
375 | } | |
df5f8314 EB |
376 | task_sig(m, task); |
377 | task_cap(m, task); | |
2f4b3bf6 | 378 | task_seccomp(m, task); |
d01d4827 | 379 | task_cpus_allowed(m, task); |
df5f8314 | 380 | cpuset_task_status_allowed(m, task); |
df5f8314 EB |
381 | task_context_switch_counts(m, task); |
382 | return 0; | |
1da177e4 LT |
383 | } |
384 | ||
ee992744 EB |
385 | static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, |
386 | struct pid *pid, struct task_struct *task, int whole) | |
1da177e4 | 387 | { |
b2f73922 | 388 | unsigned long vsize, eip, esp, wchan = 0; |
715be1fc | 389 | int priority, nice; |
1da177e4 LT |
390 | int tty_pgrp = -1, tty_nr = 0; |
391 | sigset_t sigign, sigcatch; | |
392 | char state; | |
8ea02606 | 393 | pid_t ppid = 0, pgid = -1, sid = -1; |
1da177e4 | 394 | int num_threads = 0; |
f83ce3e6 | 395 | int permitted; |
1da177e4 LT |
396 | struct mm_struct *mm; |
397 | unsigned long long start_time; | |
398 | unsigned long cmin_flt = 0, cmaj_flt = 0; | |
399 | unsigned long min_flt = 0, maj_flt = 0; | |
5613fda9 | 400 | u64 cutime, cstime, utime, stime; |
16a6d9be | 401 | u64 cgtime, gtime; |
1da177e4 | 402 | unsigned long rsslim = 0; |
1da177e4 | 403 | char tcomm[sizeof(task->comm)]; |
a593d6ed | 404 | unsigned long flags; |
1da177e4 LT |
405 | |
406 | state = *get_task_state(task); | |
407 | vsize = eip = esp = 0; | |
caaee623 | 408 | permitted = ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS | PTRACE_MODE_NOAUDIT); |
1da177e4 LT |
409 | mm = get_task_mm(task); |
410 | if (mm) { | |
411 | vsize = task_vsize(mm); | |
0a1eb2d4 AL |
412 | /* |
413 | * esp and eip are intentionally zeroed out. There is no | |
414 | * non-racy way to read them without freezing the task. | |
415 | * Programs that need reliable values can use ptrace(2). | |
fd7d5627 JO |
416 | * |
417 | * The only exception is if the task is core dumping because | |
418 | * a program is not able to use ptrace(2) in that case. It is | |
419 | * safe because the task has stopped executing permanently. | |
0a1eb2d4 | 420 | */ |
fd7d5627 | 421 | if (permitted && (task->flags & PF_DUMPCORE)) { |
8bb2ee19 AD |
422 | if (try_get_task_stack(task)) { |
423 | eip = KSTK_EIP(task); | |
424 | esp = KSTK_ESP(task); | |
425 | put_task_stack(task); | |
426 | } | |
fd7d5627 | 427 | } |
1da177e4 LT |
428 | } |
429 | ||
430 | get_task_comm(tcomm, task); | |
431 | ||
432 | sigemptyset(&sigign); | |
433 | sigemptyset(&sigcatch); | |
64861634 MS |
434 | cutime = cstime = utime = stime = 0; |
435 | cgtime = gtime = 0; | |
3cfd0885 | 436 | |
a593d6ed ON |
437 | if (lock_task_sighand(task, &flags)) { |
438 | struct signal_struct *sig = task->signal; | |
91593504 ON |
439 | |
440 | if (sig->tty) { | |
5d0fdf1e AC |
441 | struct pid *pgrp = tty_get_pgrp(sig->tty); |
442 | tty_pgrp = pid_nr_ns(pgrp, ns); | |
443 | put_pid(pgrp); | |
91593504 | 444 | tty_nr = new_encode_dev(tty_devnum(sig->tty)); |
a593d6ed ON |
445 | } |
446 | ||
7e49827c | 447 | num_threads = get_nr_threads(task); |
1da177e4 LT |
448 | collect_sigign_sigcatch(task, &sigign, &sigcatch); |
449 | ||
a593d6ed ON |
450 | cmin_flt = sig->cmin_flt; |
451 | cmaj_flt = sig->cmaj_flt; | |
452 | cutime = sig->cutime; | |
453 | cstime = sig->cstime; | |
9ac52315 | 454 | cgtime = sig->cgtime; |
6aa7de05 | 455 | rsslim = READ_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur); |
a593d6ed | 456 | |
1da177e4 LT |
457 | /* add up live thread stats at the group level */ |
458 | if (whole) { | |
a593d6ed | 459 | struct task_struct *t = task; |
1da177e4 LT |
460 | do { |
461 | min_flt += t->min_flt; | |
462 | maj_flt += t->maj_flt; | |
6fac4829 | 463 | gtime += task_gtime(t); |
185ee40e | 464 | } while_each_thread(task, t); |
1da177e4 | 465 | |
a593d6ed ON |
466 | min_flt += sig->min_flt; |
467 | maj_flt += sig->maj_flt; | |
e80d0a1a | 468 | thread_group_cputime_adjusted(task, &utime, &stime); |
64861634 | 469 | gtime += sig->gtime; |
1da177e4 | 470 | } |
a593d6ed | 471 | |
b488893a | 472 | sid = task_session_nr_ns(task, ns); |
a98fdcef | 473 | ppid = task_tgid_nr_ns(task->real_parent, ns); |
b488893a | 474 | pgid = task_pgrp_nr_ns(task, ns); |
a593d6ed ON |
475 | |
476 | unlock_task_sighand(task, &flags); | |
1da177e4 | 477 | } |
1da177e4 | 478 | |
f83ce3e6 | 479 | if (permitted && (!whole || num_threads < 2)) |
1da177e4 LT |
480 | wchan = get_wchan(task); |
481 | if (!whole) { | |
482 | min_flt = task->min_flt; | |
483 | maj_flt = task->maj_flt; | |
e80d0a1a | 484 | task_cputime_adjusted(task, &utime, &stime); |
6fac4829 | 485 | gtime = task_gtime(task); |
1da177e4 LT |
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 | ||
1da177e4 | 493 | /* convert nsec -> ticks */ |
57e0be04 | 494 | start_time = nsec_to_clock_t(task->real_start_time); |
1da177e4 | 495 | |
d0f02231 AV |
496 | seq_put_decimal_ull(m, "", pid_nr_ns(pid, ns)); |
497 | seq_puts(m, " ("); | |
498 | seq_puts(m, tcomm); | |
499 | seq_puts(m, ") "); | |
500 | seq_putc(m, state); | |
75ba1d07 JP |
501 | seq_put_decimal_ll(m, " ", ppid); |
502 | seq_put_decimal_ll(m, " ", pgid); | |
503 | seq_put_decimal_ll(m, " ", sid); | |
504 | seq_put_decimal_ll(m, " ", tty_nr); | |
505 | seq_put_decimal_ll(m, " ", tty_pgrp); | |
506 | seq_put_decimal_ull(m, " ", task->flags); | |
507 | seq_put_decimal_ull(m, " ", min_flt); | |
508 | seq_put_decimal_ull(m, " ", cmin_flt); | |
509 | seq_put_decimal_ull(m, " ", maj_flt); | |
510 | seq_put_decimal_ull(m, " ", cmaj_flt); | |
5613fda9 FW |
511 | seq_put_decimal_ull(m, " ", nsec_to_clock_t(utime)); |
512 | seq_put_decimal_ull(m, " ", nsec_to_clock_t(stime)); | |
513 | seq_put_decimal_ll(m, " ", nsec_to_clock_t(cutime)); | |
514 | seq_put_decimal_ll(m, " ", nsec_to_clock_t(cstime)); | |
75ba1d07 JP |
515 | seq_put_decimal_ll(m, " ", priority); |
516 | seq_put_decimal_ll(m, " ", nice); | |
517 | seq_put_decimal_ll(m, " ", num_threads); | |
518 | seq_put_decimal_ull(m, " ", 0); | |
519 | seq_put_decimal_ull(m, " ", start_time); | |
520 | seq_put_decimal_ull(m, " ", vsize); | |
521 | seq_put_decimal_ull(m, " ", mm ? get_mm_rss(mm) : 0); | |
522 | seq_put_decimal_ull(m, " ", rsslim); | |
523 | seq_put_decimal_ull(m, " ", mm ? (permitted ? mm->start_code : 1) : 0); | |
524 | seq_put_decimal_ull(m, " ", mm ? (permitted ? mm->end_code : 1) : 0); | |
525 | seq_put_decimal_ull(m, " ", (permitted && mm) ? mm->start_stack : 0); | |
526 | seq_put_decimal_ull(m, " ", esp); | |
527 | seq_put_decimal_ull(m, " ", eip); | |
bda7bad6 KH |
528 | /* The signal information here is obsolete. |
529 | * It must be decimal for Linux 2.0 compatibility. | |
530 | * Use /proc/#/status for real-time signals. | |
531 | */ | |
75ba1d07 JP |
532 | seq_put_decimal_ull(m, " ", task->pending.signal.sig[0] & 0x7fffffffUL); |
533 | seq_put_decimal_ull(m, " ", task->blocked.sig[0] & 0x7fffffffUL); | |
534 | seq_put_decimal_ull(m, " ", sigign.sig[0] & 0x7fffffffUL); | |
535 | seq_put_decimal_ull(m, " ", sigcatch.sig[0] & 0x7fffffffUL); | |
b2f73922 IM |
536 | |
537 | /* | |
538 | * We used to output the absolute kernel address, but that's an | |
539 | * information leak - so instead we show a 0/1 flag here, to signal | |
540 | * to user-space whether there's a wchan field in /proc/PID/wchan. | |
541 | * | |
542 | * This works with older implementations of procps as well. | |
543 | */ | |
544 | if (wchan) | |
545 | seq_puts(m, " 1"); | |
546 | else | |
547 | seq_puts(m, " 0"); | |
548 | ||
75ba1d07 JP |
549 | seq_put_decimal_ull(m, " ", 0); |
550 | seq_put_decimal_ull(m, " ", 0); | |
551 | seq_put_decimal_ll(m, " ", task->exit_signal); | |
552 | seq_put_decimal_ll(m, " ", task_cpu(task)); | |
553 | seq_put_decimal_ull(m, " ", task->rt_priority); | |
554 | seq_put_decimal_ull(m, " ", task->policy); | |
555 | seq_put_decimal_ull(m, " ", delayacct_blkio_ticks(task)); | |
16a6d9be FW |
556 | seq_put_decimal_ull(m, " ", nsec_to_clock_t(gtime)); |
557 | seq_put_decimal_ll(m, " ", nsec_to_clock_t(cgtime)); | |
5b172087 CG |
558 | |
559 | if (mm && permitted) { | |
75ba1d07 JP |
560 | seq_put_decimal_ull(m, " ", mm->start_data); |
561 | seq_put_decimal_ull(m, " ", mm->end_data); | |
562 | seq_put_decimal_ull(m, " ", mm->start_brk); | |
563 | seq_put_decimal_ull(m, " ", mm->arg_start); | |
564 | seq_put_decimal_ull(m, " ", mm->arg_end); | |
565 | seq_put_decimal_ull(m, " ", mm->env_start); | |
566 | seq_put_decimal_ull(m, " ", mm->env_end); | |
5b172087 | 567 | } else |
75ba1d07 | 568 | seq_puts(m, " 0 0 0 0 0 0 0"); |
5b172087 CG |
569 | |
570 | if (permitted) | |
75ba1d07 | 571 | seq_put_decimal_ll(m, " ", task->exit_code); |
5b172087 | 572 | else |
75ba1d07 | 573 | seq_puts(m, " 0"); |
5b172087 | 574 | |
bda7bad6 | 575 | seq_putc(m, '\n'); |
8ea02606 | 576 | if (mm) |
1da177e4 | 577 | mmput(mm); |
ee992744 | 578 | return 0; |
1da177e4 LT |
579 | } |
580 | ||
ee992744 EB |
581 | int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns, |
582 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 583 | { |
ee992744 | 584 | return do_task_stat(m, ns, pid, task, 0); |
1da177e4 LT |
585 | } |
586 | ||
ee992744 EB |
587 | int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, |
588 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 589 | { |
ee992744 | 590 | return do_task_stat(m, ns, pid, task, 1); |
1da177e4 LT |
591 | } |
592 | ||
a56d3fc7 EB |
593 | int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, |
594 | struct pid *pid, struct task_struct *task) | |
1da177e4 | 595 | { |
a2ade7b6 | 596 | unsigned long size = 0, resident = 0, shared = 0, text = 0, data = 0; |
1da177e4 | 597 | struct mm_struct *mm = get_task_mm(task); |
8ea02606 | 598 | |
1da177e4 LT |
599 | if (mm) { |
600 | size = task_statm(mm, &shared, &text, &data, &resident); | |
601 | mmput(mm); | |
602 | } | |
bda7bad6 KH |
603 | /* |
604 | * For quick read, open code by putting numbers directly | |
605 | * expected format is | |
606 | * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n", | |
607 | * size, resident, shared, text, data); | |
608 | */ | |
75ba1d07 JP |
609 | seq_put_decimal_ull(m, "", size); |
610 | seq_put_decimal_ull(m, " ", resident); | |
611 | seq_put_decimal_ull(m, " ", shared); | |
612 | seq_put_decimal_ull(m, " ", text); | |
613 | seq_put_decimal_ull(m, " ", 0); | |
614 | seq_put_decimal_ull(m, " ", data); | |
615 | seq_put_decimal_ull(m, " ", 0); | |
bda7bad6 | 616 | seq_putc(m, '\n'); |
1da177e4 | 617 | |
a56d3fc7 | 618 | return 0; |
1da177e4 | 619 | } |
81841161 | 620 | |
2e13ba54 | 621 | #ifdef CONFIG_PROC_CHILDREN |
81841161 CG |
622 | static struct pid * |
623 | get_children_pid(struct inode *inode, struct pid *pid_prev, loff_t pos) | |
624 | { | |
625 | struct task_struct *start, *task; | |
626 | struct pid *pid = NULL; | |
627 | ||
628 | read_lock(&tasklist_lock); | |
629 | ||
630 | start = pid_task(proc_pid(inode), PIDTYPE_PID); | |
631 | if (!start) | |
632 | goto out; | |
633 | ||
634 | /* | |
635 | * Lets try to continue searching first, this gives | |
636 | * us significant speedup on children-rich processes. | |
637 | */ | |
638 | if (pid_prev) { | |
639 | task = pid_task(pid_prev, PIDTYPE_PID); | |
640 | if (task && task->real_parent == start && | |
641 | !(list_empty(&task->sibling))) { | |
642 | if (list_is_last(&task->sibling, &start->children)) | |
643 | goto out; | |
644 | task = list_first_entry(&task->sibling, | |
645 | struct task_struct, sibling); | |
646 | pid = get_pid(task_pid(task)); | |
647 | goto out; | |
648 | } | |
649 | } | |
650 | ||
651 | /* | |
652 | * Slow search case. | |
653 | * | |
654 | * We might miss some children here if children | |
655 | * are exited while we were not holding the lock, | |
656 | * but it was never promised to be accurate that | |
657 | * much. | |
658 | * | |
659 | * "Just suppose that the parent sleeps, but N children | |
660 | * exit after we printed their tids. Now the slow paths | |
661 | * skips N extra children, we miss N tasks." (c) | |
662 | * | |
663 | * So one need to stop or freeze the leader and all | |
664 | * its children to get a precise result. | |
665 | */ | |
666 | list_for_each_entry(task, &start->children, sibling) { | |
667 | if (pos-- == 0) { | |
668 | pid = get_pid(task_pid(task)); | |
669 | break; | |
670 | } | |
671 | } | |
672 | ||
673 | out: | |
674 | read_unlock(&tasklist_lock); | |
675 | return pid; | |
676 | } | |
677 | ||
678 | static int children_seq_show(struct seq_file *seq, void *v) | |
679 | { | |
680 | struct inode *inode = seq->private; | |
681 | pid_t pid; | |
682 | ||
683 | pid = pid_nr_ns(v, inode->i_sb->s_fs_info); | |
25ce3191 JP |
684 | seq_printf(seq, "%d ", pid); |
685 | ||
686 | return 0; | |
81841161 CG |
687 | } |
688 | ||
689 | static void *children_seq_start(struct seq_file *seq, loff_t *pos) | |
690 | { | |
691 | return get_children_pid(seq->private, NULL, *pos); | |
692 | } | |
693 | ||
694 | static void *children_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
695 | { | |
696 | struct pid *pid; | |
697 | ||
698 | pid = get_children_pid(seq->private, v, *pos + 1); | |
699 | put_pid(v); | |
700 | ||
701 | ++*pos; | |
702 | return pid; | |
703 | } | |
704 | ||
705 | static void children_seq_stop(struct seq_file *seq, void *v) | |
706 | { | |
707 | put_pid(v); | |
708 | } | |
709 | ||
710 | static const struct seq_operations children_seq_ops = { | |
711 | .start = children_seq_start, | |
712 | .next = children_seq_next, | |
713 | .stop = children_seq_stop, | |
714 | .show = children_seq_show, | |
715 | }; | |
716 | ||
717 | static int children_seq_open(struct inode *inode, struct file *file) | |
718 | { | |
719 | struct seq_file *m; | |
720 | int ret; | |
721 | ||
722 | ret = seq_open(file, &children_seq_ops); | |
723 | if (ret) | |
724 | return ret; | |
725 | ||
726 | m = file->private_data; | |
727 | m->private = inode; | |
728 | ||
729 | return ret; | |
730 | } | |
731 | ||
81841161 CG |
732 | const struct file_operations proc_tid_children_operations = { |
733 | .open = children_seq_open, | |
734 | .read = seq_read, | |
735 | .llseek = seq_lseek, | |
171ef917 | 736 | .release = seq_release, |
81841161 | 737 | }; |
2e13ba54 | 738 | #endif /* CONFIG_PROC_CHILDREN */ |