11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/fs/proc/array.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1992 by Linus Torvalds 51da177e4SLinus Torvalds * based on ideas by Darren Senn 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * Fixes: 81da177e4SLinus Torvalds * Michael. K. Johnson: stat,statm extensions. 91da177e4SLinus Torvalds * <johnsonm@stolaf.edu> 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * Pauline Middelink : Made cmdline,envline only break at '\0's, to 121da177e4SLinus Torvalds * make sure SET_PROCTITLE works. Also removed 131da177e4SLinus Torvalds * bad '!' which forced address recalculation for 141da177e4SLinus Torvalds * EVERY character on the current page. 151da177e4SLinus Torvalds * <middelin@polyware.iaf.nl> 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * Danny ter Haar : added cpuinfo 181da177e4SLinus Torvalds * <dth@cistron.nl> 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds * Alessandro Rubini : profile extension. 211da177e4SLinus Torvalds * <rubini@ipvvis.unipv.it> 221da177e4SLinus Torvalds * 231da177e4SLinus Torvalds * Jeff Tranter : added BogoMips field to cpuinfo 241da177e4SLinus Torvalds * <Jeff_Tranter@Mitel.COM> 251da177e4SLinus Torvalds * 261da177e4SLinus Torvalds * Bruno Haible : remove 4K limit for the maps file 271da177e4SLinus Torvalds * <haible@ma2s2.mathematik.uni-karlsruhe.de> 281da177e4SLinus Torvalds * 291da177e4SLinus Torvalds * Yves Arrouye : remove removal of trailing spaces in get_array. 301da177e4SLinus Torvalds * <Yves.Arrouye@marin.fdn.fr> 311da177e4SLinus Torvalds * 321da177e4SLinus Torvalds * Jerome Forissier : added per-CPU time information to /proc/stat 331da177e4SLinus Torvalds * and /proc/<pid>/cpu extension 341da177e4SLinus Torvalds * <forissier@isia.cma.fr> 351da177e4SLinus Torvalds * - Incorporation and non-SMP safe operation 361da177e4SLinus Torvalds * of forissier patch in 2.1.78 by 371da177e4SLinus Torvalds * Hans Marcus <crowbar@concepts.nl> 381da177e4SLinus Torvalds * 391da177e4SLinus Torvalds * aeb@cwi.nl : /proc/partitions 401da177e4SLinus Torvalds * 411da177e4SLinus Torvalds * 421da177e4SLinus Torvalds * Alan Cox : security fixes. 43526719baSAlan Cox * <alan@lxorguk.ukuu.org.uk> 441da177e4SLinus Torvalds * 451da177e4SLinus Torvalds * Al Viro : safe handling of mm_struct 461da177e4SLinus Torvalds * 471da177e4SLinus Torvalds * Gerhard Wichert : added BIGMEM support 481da177e4SLinus Torvalds * Siemens AG <Gerhard.Wichert@pdb.siemens.de> 491da177e4SLinus Torvalds * 501da177e4SLinus Torvalds * Al Viro & Jeff Garzik : moved most of the thing into base.c and 511da177e4SLinus Torvalds * : proc_misc.c. The rest may eventually go into 521da177e4SLinus Torvalds * : base.c too. 531da177e4SLinus Torvalds */ 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds #include <linux/types.h> 561da177e4SLinus Torvalds #include <linux/errno.h> 571da177e4SLinus Torvalds #include <linux/time.h> 581da177e4SLinus Torvalds #include <linux/kernel.h> 591da177e4SLinus Torvalds #include <linux/kernel_stat.h> 601da177e4SLinus Torvalds #include <linux/tty.h> 611da177e4SLinus Torvalds #include <linux/string.h> 621da177e4SLinus Torvalds #include <linux/mman.h> 631da177e4SLinus Torvalds #include <linux/proc_fs.h> 641da177e4SLinus Torvalds #include <linux/ioport.h> 658ea02606SIngo Molnar #include <linux/uaccess.h> 668ea02606SIngo Molnar #include <linux/io.h> 671da177e4SLinus Torvalds #include <linux/mm.h> 681da177e4SLinus Torvalds #include <linux/hugetlb.h> 691da177e4SLinus Torvalds #include <linux/pagemap.h> 701da177e4SLinus Torvalds #include <linux/swap.h> 711da177e4SLinus Torvalds #include <linux/smp.h> 721da177e4SLinus Torvalds #include <linux/signal.h> 731da177e4SLinus Torvalds #include <linux/highmem.h> 741da177e4SLinus Torvalds #include <linux/file.h> 759f3acc31SAl Viro #include <linux/fdtable.h> 761da177e4SLinus Torvalds #include <linux/times.h> 771da177e4SLinus Torvalds #include <linux/cpuset.h> 784fb3a538SDipankar Sarma #include <linux/rcupdate.h> 7925890454SShailabh Nagar #include <linux/delayacct.h> 80ee992744SEric W. Biederman #include <linux/seq_file.h> 81b488893aSPavel Emelyanov #include <linux/pid_namespace.h> 82f83ce3e6SJake Edge #include <linux/ptrace.h> 830d094efeSRoland McGrath #include <linux/tracehook.h> 84edc924e0SAndy Shevchenko #include <linux/string_helpers.h> 85ae2975bcSEric W. Biederman #include <linux/user_namespace.h> 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds #include <asm/pgtable.h> 881da177e4SLinus Torvalds #include <asm/processor.h> 891da177e4SLinus Torvalds #include "internal.h" 901da177e4SLinus Torvalds 91df5f8314SEric W. Biederman static inline void task_name(struct seq_file *m, struct task_struct *p) 921da177e4SLinus Torvalds { 93edc924e0SAndy Shevchenko char *buf; 941da177e4SLinus Torvalds char tcomm[sizeof(p->comm)]; 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds get_task_comm(tcomm, p); 971da177e4SLinus Torvalds 989d6de12fSAlexey Dobriyan seq_puts(m, "Name:\t"); 99df5f8314SEric W. Biederman buf = m->buf + m->count; 100edc924e0SAndy Shevchenko 101edc924e0SAndy Shevchenko /* Ignore error for now */ 10241416f23SRasmus Villemoes buf += string_escape_str(tcomm, buf, m->size - m->count, 103edc924e0SAndy Shevchenko ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\"); 104edc924e0SAndy Shevchenko 105df5f8314SEric W. Biederman m->count = buf - m->buf; 1069d6de12fSAlexey Dobriyan seq_putc(m, '\n'); 1071da177e4SLinus Torvalds } 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds /* 1101da177e4SLinus Torvalds * The task state array is a strange "bitmap" of 1111da177e4SLinus Torvalds * reasons to sleep. Thus "running" is zero, and 1121da177e4SLinus Torvalds * you can test for combinations of others with 1131da177e4SLinus Torvalds * simple bit tests. 1141da177e4SLinus Torvalds */ 115e130aa70SMike Frysinger static const char * const task_state_array[] = { 1161da177e4SLinus Torvalds "R (running)", /* 0 */ 1171da177e4SLinus Torvalds "S (sleeping)", /* 1 */ 1181da177e4SLinus Torvalds "D (disk sleep)", /* 2 */ 1191da177e4SLinus Torvalds "T (stopped)", /* 4 */ 120464763cfSPeter Zijlstra "t (tracing stop)", /* 8 */ 121ad86622bSOleg Nesterov "X (dead)", /* 16 */ 122ad86622bSOleg Nesterov "Z (zombie)", /* 32 */ 1231da177e4SLinus Torvalds }; 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds static inline const char *get_task_state(struct task_struct *tsk) 1261da177e4SLinus Torvalds { 12774e37200SOleg Nesterov unsigned int state = (tsk->state | tsk->exit_state) & TASK_REPORT; 128e1781538SPeter Zijlstra 129f51c0eaeSChris Metcalf /* 130f51c0eaeSChris Metcalf * Parked tasks do not run; they sit in __kthread_parkme(). 131f51c0eaeSChris Metcalf * Without this check, we would report them as running, which is 132f51c0eaeSChris Metcalf * clearly wrong, so we report them as sleeping instead. 133f51c0eaeSChris Metcalf */ 134f51c0eaeSChris Metcalf if (tsk->state == TASK_PARKED) 135f51c0eaeSChris Metcalf state = TASK_INTERRUPTIBLE; 136f51c0eaeSChris Metcalf 13774e37200SOleg Nesterov BUILD_BUG_ON(1 + ilog2(TASK_REPORT) != ARRAY_SIZE(task_state_array)-1); 1381da177e4SLinus Torvalds 13974e37200SOleg Nesterov return task_state_array[fls(state)]; 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 142df5f8314SEric W. Biederman static inline void task_state(struct seq_file *m, struct pid_namespace *ns, 143df5f8314SEric W. Biederman struct pid *pid, struct task_struct *p) 1441da177e4SLinus Torvalds { 145e9f238c3SEric W. Biederman struct user_namespace *user_ns = seq_user_ns(m); 1461da177e4SLinus Torvalds struct group_info *group_info; 1471da177e4SLinus Torvalds int g; 148abdba6e9SOleg Nesterov struct task_struct *tracer; 149c69e8d9cSDavid Howells const struct cred *cred; 150abdba6e9SOleg Nesterov pid_t ppid, tpid = 0, tgid, ngid; 1510f4a0d53SOleg Nesterov unsigned int max_fds = 0; 1521da177e4SLinus Torvalds 153b0fa9db6SOleg Nesterov rcu_read_lock(); 154b488893aSPavel Emelyanov ppid = pid_alive(p) ? 155b488893aSPavel Emelyanov task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0; 156abdba6e9SOleg Nesterov 157abdba6e9SOleg Nesterov tracer = ptrace_parent(p); 1580d094efeSRoland McGrath if (tracer) 1590d094efeSRoland McGrath tpid = task_pid_nr_ns(tracer, ns); 160b0fafc11SOleg Nesterov 161b0fafc11SOleg Nesterov tgid = task_tgid_nr_ns(p, ns); 162b0fafc11SOleg Nesterov ngid = task_numa_group_id(p); 163de09a977SDavid Howells cred = get_task_cred(p); 1640f4a0d53SOleg Nesterov 1650f4a0d53SOleg Nesterov task_lock(p); 1660f4a0d53SOleg Nesterov if (p->files) 1670f4a0d53SOleg Nesterov max_fds = files_fdtable(p->files)->max_fds; 1680f4a0d53SOleg Nesterov task_unlock(p); 169b0fafc11SOleg Nesterov rcu_read_unlock(); 1700f4a0d53SOleg Nesterov 171df5f8314SEric W. Biederman seq_printf(m, 1721da177e4SLinus Torvalds "State:\t%s\n" 1731da177e4SLinus Torvalds "Tgid:\t%d\n" 174e29cf08bSMel Gorman "Ngid:\t%d\n" 1751da177e4SLinus Torvalds "Pid:\t%d\n" 1761da177e4SLinus Torvalds "PPid:\t%d\n" 1771da177e4SLinus Torvalds "TracerPid:\t%d\n" 1781da177e4SLinus Torvalds "Uid:\t%d\t%d\t%d\t%d\n" 1790f4a0d53SOleg Nesterov "Gid:\t%d\t%d\t%d\t%d\n" 1800f4a0d53SOleg Nesterov "FDSize:\t%d\nGroups:\t", 1811da177e4SLinus Torvalds get_task_state(p), 182b0fafc11SOleg Nesterov tgid, ngid, pid_nr_ns(pid, ns), ppid, tpid, 183dcb0f222SEric W. Biederman from_kuid_munged(user_ns, cred->uid), 184dcb0f222SEric W. Biederman from_kuid_munged(user_ns, cred->euid), 185dcb0f222SEric W. Biederman from_kuid_munged(user_ns, cred->suid), 186dcb0f222SEric W. Biederman from_kuid_munged(user_ns, cred->fsuid), 187dcb0f222SEric W. Biederman from_kgid_munged(user_ns, cred->gid), 188dcb0f222SEric W. Biederman from_kgid_munged(user_ns, cred->egid), 189dcb0f222SEric W. Biederman from_kgid_munged(user_ns, cred->sgid), 1900f4a0d53SOleg Nesterov from_kgid_munged(user_ns, cred->fsgid), 1910f4a0d53SOleg Nesterov max_fds); 1921da177e4SLinus Torvalds 193c69e8d9cSDavid Howells group_info = cred->group_info; 1948d238027SArtem Bityutskiy for (g = 0; g < group_info->ngroups; g++) 195ae2975bcSEric W. Biederman seq_printf(m, "%d ", 196ae2975bcSEric W. Biederman from_kgid_munged(user_ns, GROUP_AT(group_info, g))); 197c69e8d9cSDavid Howells put_cred(cred); 1981da177e4SLinus Torvalds 199e4bc3324SChen Hanxiao #ifdef CONFIG_PID_NS 200e4bc3324SChen Hanxiao seq_puts(m, "\nNStgid:"); 201e4bc3324SChen Hanxiao for (g = ns->level; g <= pid->level; g++) 202e4bc3324SChen Hanxiao seq_printf(m, "\t%d", 203e4bc3324SChen Hanxiao task_tgid_nr_ns(p, pid->numbers[g].ns)); 204e4bc3324SChen Hanxiao seq_puts(m, "\nNSpid:"); 205e4bc3324SChen Hanxiao for (g = ns->level; g <= pid->level; g++) 206e4bc3324SChen Hanxiao seq_printf(m, "\t%d", 207e4bc3324SChen Hanxiao task_pid_nr_ns(p, pid->numbers[g].ns)); 208e4bc3324SChen Hanxiao seq_puts(m, "\nNSpgid:"); 209e4bc3324SChen Hanxiao for (g = ns->level; g <= pid->level; g++) 210e4bc3324SChen Hanxiao seq_printf(m, "\t%d", 211e4bc3324SChen Hanxiao task_pgrp_nr_ns(p, pid->numbers[g].ns)); 212e4bc3324SChen Hanxiao seq_puts(m, "\nNSsid:"); 213e4bc3324SChen Hanxiao for (g = ns->level; g <= pid->level; g++) 214e4bc3324SChen Hanxiao seq_printf(m, "\t%d", 215e4bc3324SChen Hanxiao task_session_nr_ns(p, pid->numbers[g].ns)); 216e4bc3324SChen Hanxiao #endif 2179d6de12fSAlexey Dobriyan seq_putc(m, '\n'); 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds 220138d22b5SCyrill Gorcunov void render_sigset_t(struct seq_file *m, const char *header, 221df5f8314SEric W. Biederman sigset_t *set) 2221da177e4SLinus Torvalds { 223df5f8314SEric W. Biederman int i; 2241da177e4SLinus Torvalds 2259d6de12fSAlexey Dobriyan seq_puts(m, header); 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds i = _NSIG; 2281da177e4SLinus Torvalds do { 2291da177e4SLinus Torvalds int x = 0; 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds i -= 4; 2321da177e4SLinus Torvalds if (sigismember(set, i+1)) x |= 1; 2331da177e4SLinus Torvalds if (sigismember(set, i+2)) x |= 2; 2341da177e4SLinus Torvalds if (sigismember(set, i+3)) x |= 4; 2351da177e4SLinus Torvalds if (sigismember(set, i+4)) x |= 8; 236df5f8314SEric W. Biederman seq_printf(m, "%x", x); 2371da177e4SLinus Torvalds } while (i >= 4); 2381da177e4SLinus Torvalds 2399d6de12fSAlexey Dobriyan seq_putc(m, '\n'); 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign, 2431da177e4SLinus Torvalds sigset_t *catch) 2441da177e4SLinus Torvalds { 2451da177e4SLinus Torvalds struct k_sigaction *k; 2461da177e4SLinus Torvalds int i; 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds k = p->sighand->action; 2491da177e4SLinus Torvalds for (i = 1; i <= _NSIG; ++i, ++k) { 2501da177e4SLinus Torvalds if (k->sa.sa_handler == SIG_IGN) 2511da177e4SLinus Torvalds sigaddset(ign, i); 2521da177e4SLinus Torvalds else if (k->sa.sa_handler != SIG_DFL) 2531da177e4SLinus Torvalds sigaddset(catch, i); 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds 257df5f8314SEric W. Biederman static inline void task_sig(struct seq_file *m, struct task_struct *p) 2581da177e4SLinus Torvalds { 2595e6b3f42SOleg Nesterov unsigned long flags; 2601da177e4SLinus Torvalds sigset_t pending, shpending, blocked, ignored, caught; 2611da177e4SLinus Torvalds int num_threads = 0; 2621da177e4SLinus Torvalds unsigned long qsize = 0; 2631da177e4SLinus Torvalds unsigned long qlim = 0; 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds sigemptyset(&pending); 2661da177e4SLinus Torvalds sigemptyset(&shpending); 2671da177e4SLinus Torvalds sigemptyset(&blocked); 2681da177e4SLinus Torvalds sigemptyset(&ignored); 2691da177e4SLinus Torvalds sigemptyset(&caught); 2701da177e4SLinus Torvalds 2715e6b3f42SOleg Nesterov if (lock_task_sighand(p, &flags)) { 2721da177e4SLinus Torvalds pending = p->pending.signal; 2731da177e4SLinus Torvalds shpending = p->signal->shared_pending.signal; 2741da177e4SLinus Torvalds blocked = p->blocked; 2751da177e4SLinus Torvalds collect_sigign_sigcatch(p, &ignored, &caught); 2767e49827cSOleg Nesterov num_threads = get_nr_threads(p); 2777dc52157SPaul E. McKenney rcu_read_lock(); /* FIXME: is this correct? */ 278c69e8d9cSDavid Howells qsize = atomic_read(&__task_cred(p)->user->sigpending); 2797dc52157SPaul E. McKenney rcu_read_unlock(); 280d554ed89SJiri Slaby qlim = task_rlimit(p, RLIMIT_SIGPENDING); 2815e6b3f42SOleg Nesterov unlock_task_sighand(p, &flags); 2821da177e4SLinus Torvalds } 2831da177e4SLinus Torvalds 284df5f8314SEric W. Biederman seq_printf(m, "Threads:\t%d\n", num_threads); 285df5f8314SEric W. Biederman seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim); 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds /* render them all */ 288df5f8314SEric W. Biederman render_sigset_t(m, "SigPnd:\t", &pending); 289df5f8314SEric W. Biederman render_sigset_t(m, "ShdPnd:\t", &shpending); 290df5f8314SEric W. Biederman render_sigset_t(m, "SigBlk:\t", &blocked); 291df5f8314SEric W. Biederman render_sigset_t(m, "SigIgn:\t", &ignored); 292df5f8314SEric W. Biederman render_sigset_t(m, "SigCgt:\t", &caught); 2931da177e4SLinus Torvalds } 2941da177e4SLinus Torvalds 295df5f8314SEric W. Biederman static void render_cap_t(struct seq_file *m, const char *header, 296df5f8314SEric W. Biederman kernel_cap_t *a) 297e338d263SAndrew Morgan { 298e338d263SAndrew Morgan unsigned __capi; 299e338d263SAndrew Morgan 3009d6de12fSAlexey Dobriyan seq_puts(m, header); 301e338d263SAndrew Morgan CAP_FOR_EACH_U32(__capi) { 302df5f8314SEric W. Biederman seq_printf(m, "%08x", 3037d8b6c63SEric Paris a->cap[CAP_LAST_U32 - __capi]); 304e338d263SAndrew Morgan } 3059d6de12fSAlexey Dobriyan seq_putc(m, '\n'); 306e338d263SAndrew Morgan } 307e338d263SAndrew Morgan 308df5f8314SEric W. Biederman static inline void task_cap(struct seq_file *m, struct task_struct *p) 3091da177e4SLinus Torvalds { 310c69e8d9cSDavid Howells const struct cred *cred; 31158319057SAndy Lutomirski kernel_cap_t cap_inheritable, cap_permitted, cap_effective, 31258319057SAndy Lutomirski cap_bset, cap_ambient; 313b6dff3ecSDavid Howells 314c69e8d9cSDavid Howells rcu_read_lock(); 315c69e8d9cSDavid Howells cred = __task_cred(p); 316c69e8d9cSDavid Howells cap_inheritable = cred->cap_inheritable; 317c69e8d9cSDavid Howells cap_permitted = cred->cap_permitted; 318c69e8d9cSDavid Howells cap_effective = cred->cap_effective; 319c69e8d9cSDavid Howells cap_bset = cred->cap_bset; 32058319057SAndy Lutomirski cap_ambient = cred->cap_ambient; 321c69e8d9cSDavid Howells rcu_read_unlock(); 322c69e8d9cSDavid Howells 323c69e8d9cSDavid Howells render_cap_t(m, "CapInh:\t", &cap_inheritable); 324c69e8d9cSDavid Howells render_cap_t(m, "CapPrm:\t", &cap_permitted); 325c69e8d9cSDavid Howells render_cap_t(m, "CapEff:\t", &cap_effective); 326c69e8d9cSDavid Howells render_cap_t(m, "CapBnd:\t", &cap_bset); 32758319057SAndy Lutomirski render_cap_t(m, "CapAmb:\t", &cap_ambient); 3281da177e4SLinus Torvalds } 3291da177e4SLinus Torvalds 3302f4b3bf6SKees Cook static inline void task_seccomp(struct seq_file *m, struct task_struct *p) 3312f4b3bf6SKees Cook { 3322f4b3bf6SKees Cook #ifdef CONFIG_SECCOMP 3332f4b3bf6SKees Cook seq_printf(m, "Seccomp:\t%d\n", p->seccomp.mode); 3342f4b3bf6SKees Cook #endif 3352f4b3bf6SKees Cook } 3362f4b3bf6SKees Cook 337df5f8314SEric W. Biederman static inline void task_context_switch_counts(struct seq_file *m, 338df5f8314SEric W. Biederman struct task_struct *p) 339b663a79cSMaxim Uvarov { 340df5f8314SEric W. Biederman seq_printf(m, "voluntary_ctxt_switches:\t%lu\n" 341b663a79cSMaxim Uvarov "nonvoluntary_ctxt_switches:\t%lu\n", 342b663a79cSMaxim Uvarov p->nvcsw, 343b663a79cSMaxim Uvarov p->nivcsw); 344b663a79cSMaxim Uvarov } 345b663a79cSMaxim Uvarov 346d01d4827SHeiko Carstens static void task_cpus_allowed(struct seq_file *m, struct task_struct *task) 347d01d4827SHeiko Carstens { 348a0c2e07dSTejun Heo seq_printf(m, "Cpus_allowed:\t%*pb\n", 349a0c2e07dSTejun Heo cpumask_pr_args(&task->cpus_allowed)); 350a0c2e07dSTejun Heo seq_printf(m, "Cpus_allowed_list:\t%*pbl\n", 351a0c2e07dSTejun Heo cpumask_pr_args(&task->cpus_allowed)); 352d01d4827SHeiko Carstens } 353d01d4827SHeiko Carstens 354df5f8314SEric W. Biederman int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, 355df5f8314SEric W. Biederman struct pid *pid, struct task_struct *task) 3561da177e4SLinus Torvalds { 3571da177e4SLinus Torvalds struct mm_struct *mm = get_task_mm(task); 3581da177e4SLinus Torvalds 359df5f8314SEric W. Biederman task_name(m, task); 360df5f8314SEric W. Biederman task_state(m, ns, pid, task); 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds if (mm) { 363df5f8314SEric W. Biederman task_mem(m, mm); 3641da177e4SLinus Torvalds mmput(mm); 3651da177e4SLinus Torvalds } 366df5f8314SEric W. Biederman task_sig(m, task); 367df5f8314SEric W. Biederman task_cap(m, task); 3682f4b3bf6SKees Cook task_seccomp(m, task); 369d01d4827SHeiko Carstens task_cpus_allowed(m, task); 370df5f8314SEric W. Biederman cpuset_task_status_allowed(m, task); 371df5f8314SEric W. Biederman task_context_switch_counts(m, task); 372df5f8314SEric W. Biederman return 0; 3731da177e4SLinus Torvalds } 3741da177e4SLinus Torvalds 375ee992744SEric W. Biederman static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, 376ee992744SEric W. Biederman struct pid *pid, struct task_struct *task, int whole) 3771da177e4SLinus Torvalds { 378b2f73922SIngo Molnar unsigned long vsize, eip, esp, wchan = 0; 379715be1fcSJan Engelhardt int priority, nice; 3801da177e4SLinus Torvalds int tty_pgrp = -1, tty_nr = 0; 3811da177e4SLinus Torvalds sigset_t sigign, sigcatch; 3821da177e4SLinus Torvalds char state; 383a593d6edSOleg Nesterov pid_t ppid = 0, pgid = -1, sid = -1; 3841da177e4SLinus Torvalds int num_threads = 0; 385f83ce3e6SJake Edge int permitted; 3861da177e4SLinus Torvalds struct mm_struct *mm; 3871da177e4SLinus Torvalds unsigned long long start_time; 3881da177e4SLinus Torvalds unsigned long cmin_flt = 0, cmaj_flt = 0; 3891da177e4SLinus Torvalds unsigned long min_flt = 0, maj_flt = 0; 390efe567fcSChristian Borntraeger cputime_t cutime, cstime, utime, stime; 3919ac52315SLaurent Vivier cputime_t cgtime, gtime; 3921da177e4SLinus Torvalds unsigned long rsslim = 0; 3931da177e4SLinus Torvalds char tcomm[sizeof(task->comm)]; 394a593d6edSOleg Nesterov unsigned long flags; 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds state = *get_task_state(task); 3971da177e4SLinus Torvalds vsize = eip = esp = 0; 39869f594a3SEric Paris permitted = ptrace_may_access(task, PTRACE_MODE_READ | PTRACE_MODE_NOAUDIT); 3991da177e4SLinus Torvalds mm = get_task_mm(task); 4001da177e4SLinus Torvalds if (mm) { 4011da177e4SLinus Torvalds vsize = task_vsize(mm); 402f83ce3e6SJake Edge if (permitted) { 4031da177e4SLinus Torvalds eip = KSTK_EIP(task); 4041da177e4SLinus Torvalds esp = KSTK_ESP(task); 4051da177e4SLinus Torvalds } 406f83ce3e6SJake Edge } 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds get_task_comm(tcomm, task); 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds sigemptyset(&sigign); 4111da177e4SLinus Torvalds sigemptyset(&sigcatch); 41264861634SMartin Schwidefsky cutime = cstime = utime = stime = 0; 41364861634SMartin Schwidefsky cgtime = gtime = 0; 4143cfd0885SAlan Cox 415a593d6edSOleg Nesterov if (lock_task_sighand(task, &flags)) { 416a593d6edSOleg Nesterov struct signal_struct *sig = task->signal; 417a593d6edSOleg Nesterov 41891593504SOleg Nesterov if (sig->tty) { 4195d0fdf1eSAlan Cox struct pid *pgrp = tty_get_pgrp(sig->tty); 4205d0fdf1eSAlan Cox tty_pgrp = pid_nr_ns(pgrp, ns); 4215d0fdf1eSAlan Cox put_pid(pgrp); 42291593504SOleg Nesterov tty_nr = new_encode_dev(tty_devnum(sig->tty)); 423a593d6edSOleg Nesterov } 424a593d6edSOleg Nesterov 4257e49827cSOleg Nesterov num_threads = get_nr_threads(task); 4261da177e4SLinus Torvalds collect_sigign_sigcatch(task, &sigign, &sigcatch); 4271da177e4SLinus Torvalds 428a593d6edSOleg Nesterov cmin_flt = sig->cmin_flt; 429a593d6edSOleg Nesterov cmaj_flt = sig->cmaj_flt; 430a593d6edSOleg Nesterov cutime = sig->cutime; 431a593d6edSOleg Nesterov cstime = sig->cstime; 4329ac52315SLaurent Vivier cgtime = sig->cgtime; 433d554ed89SJiri Slaby rsslim = ACCESS_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur); 434a593d6edSOleg Nesterov 4351da177e4SLinus Torvalds /* add up live thread stats at the group level */ 4361da177e4SLinus Torvalds if (whole) { 437a593d6edSOleg Nesterov struct task_struct *t = task; 4381da177e4SLinus Torvalds do { 4391da177e4SLinus Torvalds min_flt += t->min_flt; 4401da177e4SLinus Torvalds maj_flt += t->maj_flt; 4416fac4829SFrederic Weisbecker gtime += task_gtime(t); 442185ee40eSOleg Nesterov } while_each_thread(task, t); 443a593d6edSOleg Nesterov 444a593d6edSOleg Nesterov min_flt += sig->min_flt; 445a593d6edSOleg Nesterov maj_flt += sig->maj_flt; 446e80d0a1aSFrederic Weisbecker thread_group_cputime_adjusted(task, &utime, &stime); 44764861634SMartin Schwidefsky gtime += sig->gtime; 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds 450b488893aSPavel Emelyanov sid = task_session_nr_ns(task, ns); 451a98fdcefSOleg Nesterov ppid = task_tgid_nr_ns(task->real_parent, ns); 452b488893aSPavel Emelyanov pgid = task_pgrp_nr_ns(task, ns); 453a593d6edSOleg Nesterov 454a593d6edSOleg Nesterov unlock_task_sighand(task, &flags); 4551da177e4SLinus Torvalds } 4561da177e4SLinus Torvalds 457f83ce3e6SJake Edge if (permitted && (!whole || num_threads < 2)) 4581da177e4SLinus Torvalds wchan = get_wchan(task); 4591da177e4SLinus Torvalds if (!whole) { 4601da177e4SLinus Torvalds min_flt = task->min_flt; 4611da177e4SLinus Torvalds maj_flt = task->maj_flt; 462e80d0a1aSFrederic Weisbecker task_cputime_adjusted(task, &utime, &stime); 4636fac4829SFrederic Weisbecker gtime = task_gtime(task); 4641da177e4SLinus Torvalds } 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds /* scale priority and nice values from timeslices to -20..20 */ 4671da177e4SLinus Torvalds /* to make it look like a "normal" Unix priority/nice value */ 4681da177e4SLinus Torvalds priority = task_prio(task); 4691da177e4SLinus Torvalds nice = task_nice(task); 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds /* convert nsec -> ticks */ 47257e0be04SThomas Gleixner start_time = nsec_to_clock_t(task->real_start_time); 4731da177e4SLinus Torvalds 474bda7bad6SKAMEZAWA Hiroyuki seq_printf(m, "%d (%s) %c", pid_nr_ns(pid, ns), tcomm, state); 475bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', ppid); 476bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', pgid); 477bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', sid); 478bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', tty_nr); 479bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', tty_pgrp); 480bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', task->flags); 481bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', min_flt); 482bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', cmin_flt); 483bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', maj_flt); 484bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', cmaj_flt); 485bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', cputime_to_clock_t(utime)); 486bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', cputime_to_clock_t(stime)); 487bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cutime)); 488bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cstime)); 489bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', priority); 490bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', nice); 491bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', num_threads); 492bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', 0); 493bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', start_time); 494bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', vsize); 495715be1fcSJan Engelhardt seq_put_decimal_ull(m, ' ', mm ? get_mm_rss(mm) : 0); 496bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', rsslim); 497bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->start_code : 1) : 0); 498bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->end_code : 1) : 0); 499bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', (permitted && mm) ? mm->start_stack : 0); 500bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', esp); 501bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', eip); 5021da177e4SLinus Torvalds /* The signal information here is obsolete. 5031da177e4SLinus Torvalds * It must be decimal for Linux 2.0 compatibility. 5041da177e4SLinus Torvalds * Use /proc/#/status for real-time signals. 5051da177e4SLinus Torvalds */ 506bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', task->pending.signal.sig[0] & 0x7fffffffUL); 507bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', task->blocked.sig[0] & 0x7fffffffUL); 508bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', sigign.sig[0] & 0x7fffffffUL); 509bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', sigcatch.sig[0] & 0x7fffffffUL); 510b2f73922SIngo Molnar 511b2f73922SIngo Molnar /* 512b2f73922SIngo Molnar * We used to output the absolute kernel address, but that's an 513b2f73922SIngo Molnar * information leak - so instead we show a 0/1 flag here, to signal 514b2f73922SIngo Molnar * to user-space whether there's a wchan field in /proc/PID/wchan. 515b2f73922SIngo Molnar * 516b2f73922SIngo Molnar * This works with older implementations of procps as well. 517b2f73922SIngo Molnar */ 518b2f73922SIngo Molnar if (wchan) 519b2f73922SIngo Molnar seq_puts(m, " 1"); 520b2f73922SIngo Molnar else 521b2f73922SIngo Molnar seq_puts(m, " 0"); 522b2f73922SIngo Molnar 523bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', 0); 524bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', 0); 525bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', task->exit_signal); 526bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', task_cpu(task)); 527bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', task->rt_priority); 528bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', task->policy); 529bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task)); 530bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime)); 531bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime)); 5325b172087SCyrill Gorcunov 5335b172087SCyrill Gorcunov if (mm && permitted) { 5345b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->start_data); 5355b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->end_data); 5365b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->start_brk); 5375b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->arg_start); 5385b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->arg_end); 5395b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->env_start); 5405b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->env_end); 5415b172087SCyrill Gorcunov } else 5425b172087SCyrill Gorcunov seq_printf(m, " 0 0 0 0 0 0 0"); 5435b172087SCyrill Gorcunov 5445b172087SCyrill Gorcunov if (permitted) 5455b172087SCyrill Gorcunov seq_put_decimal_ll(m, ' ', task->exit_code); 5465b172087SCyrill Gorcunov else 5475b172087SCyrill Gorcunov seq_put_decimal_ll(m, ' ', 0); 5485b172087SCyrill Gorcunov 549bda7bad6SKAMEZAWA Hiroyuki seq_putc(m, '\n'); 5501da177e4SLinus Torvalds if (mm) 5511da177e4SLinus Torvalds mmput(mm); 552ee992744SEric W. Biederman return 0; 5531da177e4SLinus Torvalds } 5541da177e4SLinus Torvalds 555ee992744SEric W. Biederman int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns, 556ee992744SEric W. Biederman struct pid *pid, struct task_struct *task) 5571da177e4SLinus Torvalds { 558ee992744SEric W. Biederman return do_task_stat(m, ns, pid, task, 0); 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds 561ee992744SEric W. Biederman int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, 562ee992744SEric W. Biederman struct pid *pid, struct task_struct *task) 5631da177e4SLinus Torvalds { 564ee992744SEric W. Biederman return do_task_stat(m, ns, pid, task, 1); 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds 567a56d3fc7SEric W. Biederman int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, 568a56d3fc7SEric W. Biederman struct pid *pid, struct task_struct *task) 5691da177e4SLinus Torvalds { 570a2ade7b6SAlexey Dobriyan unsigned long size = 0, resident = 0, shared = 0, text = 0, data = 0; 5711da177e4SLinus Torvalds struct mm_struct *mm = get_task_mm(task); 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds if (mm) { 5741da177e4SLinus Torvalds size = task_statm(mm, &shared, &text, &data, &resident); 5751da177e4SLinus Torvalds mmput(mm); 5761da177e4SLinus Torvalds } 577bda7bad6SKAMEZAWA Hiroyuki /* 578bda7bad6SKAMEZAWA Hiroyuki * For quick read, open code by putting numbers directly 579bda7bad6SKAMEZAWA Hiroyuki * expected format is 580bda7bad6SKAMEZAWA Hiroyuki * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n", 581bda7bad6SKAMEZAWA Hiroyuki * size, resident, shared, text, data); 582bda7bad6SKAMEZAWA Hiroyuki */ 583bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, 0, size); 584bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', resident); 585bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', shared); 586bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', text); 587bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', 0); 5883748b2f1SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', data); 589bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', 0); 590bda7bad6SKAMEZAWA Hiroyuki seq_putc(m, '\n'); 591a56d3fc7SEric W. Biederman 592a56d3fc7SEric W. Biederman return 0; 5931da177e4SLinus Torvalds } 59481841161SCyrill Gorcunov 5952e13ba54SIago López Galeiras #ifdef CONFIG_PROC_CHILDREN 59681841161SCyrill Gorcunov static struct pid * 59781841161SCyrill Gorcunov get_children_pid(struct inode *inode, struct pid *pid_prev, loff_t pos) 59881841161SCyrill Gorcunov { 59981841161SCyrill Gorcunov struct task_struct *start, *task; 60081841161SCyrill Gorcunov struct pid *pid = NULL; 60181841161SCyrill Gorcunov 60281841161SCyrill Gorcunov read_lock(&tasklist_lock); 60381841161SCyrill Gorcunov 60481841161SCyrill Gorcunov start = pid_task(proc_pid(inode), PIDTYPE_PID); 60581841161SCyrill Gorcunov if (!start) 60681841161SCyrill Gorcunov goto out; 60781841161SCyrill Gorcunov 60881841161SCyrill Gorcunov /* 60981841161SCyrill Gorcunov * Lets try to continue searching first, this gives 61081841161SCyrill Gorcunov * us significant speedup on children-rich processes. 61181841161SCyrill Gorcunov */ 61281841161SCyrill Gorcunov if (pid_prev) { 61381841161SCyrill Gorcunov task = pid_task(pid_prev, PIDTYPE_PID); 61481841161SCyrill Gorcunov if (task && task->real_parent == start && 61581841161SCyrill Gorcunov !(list_empty(&task->sibling))) { 61681841161SCyrill Gorcunov if (list_is_last(&task->sibling, &start->children)) 61781841161SCyrill Gorcunov goto out; 61881841161SCyrill Gorcunov task = list_first_entry(&task->sibling, 61981841161SCyrill Gorcunov struct task_struct, sibling); 62081841161SCyrill Gorcunov pid = get_pid(task_pid(task)); 62181841161SCyrill Gorcunov goto out; 62281841161SCyrill Gorcunov } 62381841161SCyrill Gorcunov } 62481841161SCyrill Gorcunov 62581841161SCyrill Gorcunov /* 62681841161SCyrill Gorcunov * Slow search case. 62781841161SCyrill Gorcunov * 62881841161SCyrill Gorcunov * We might miss some children here if children 62981841161SCyrill Gorcunov * are exited while we were not holding the lock, 63081841161SCyrill Gorcunov * but it was never promised to be accurate that 63181841161SCyrill Gorcunov * much. 63281841161SCyrill Gorcunov * 63381841161SCyrill Gorcunov * "Just suppose that the parent sleeps, but N children 63481841161SCyrill Gorcunov * exit after we printed their tids. Now the slow paths 63581841161SCyrill Gorcunov * skips N extra children, we miss N tasks." (c) 63681841161SCyrill Gorcunov * 63781841161SCyrill Gorcunov * So one need to stop or freeze the leader and all 63881841161SCyrill Gorcunov * its children to get a precise result. 63981841161SCyrill Gorcunov */ 64081841161SCyrill Gorcunov list_for_each_entry(task, &start->children, sibling) { 64181841161SCyrill Gorcunov if (pos-- == 0) { 64281841161SCyrill Gorcunov pid = get_pid(task_pid(task)); 64381841161SCyrill Gorcunov break; 64481841161SCyrill Gorcunov } 64581841161SCyrill Gorcunov } 64681841161SCyrill Gorcunov 64781841161SCyrill Gorcunov out: 64881841161SCyrill Gorcunov read_unlock(&tasklist_lock); 64981841161SCyrill Gorcunov return pid; 65081841161SCyrill Gorcunov } 65181841161SCyrill Gorcunov 65281841161SCyrill Gorcunov static int children_seq_show(struct seq_file *seq, void *v) 65381841161SCyrill Gorcunov { 65481841161SCyrill Gorcunov struct inode *inode = seq->private; 65581841161SCyrill Gorcunov pid_t pid; 65681841161SCyrill Gorcunov 65781841161SCyrill Gorcunov pid = pid_nr_ns(v, inode->i_sb->s_fs_info); 65825ce3191SJoe Perches seq_printf(seq, "%d ", pid); 65925ce3191SJoe Perches 66025ce3191SJoe Perches return 0; 66181841161SCyrill Gorcunov } 66281841161SCyrill Gorcunov 66381841161SCyrill Gorcunov static void *children_seq_start(struct seq_file *seq, loff_t *pos) 66481841161SCyrill Gorcunov { 66581841161SCyrill Gorcunov return get_children_pid(seq->private, NULL, *pos); 66681841161SCyrill Gorcunov } 66781841161SCyrill Gorcunov 66881841161SCyrill Gorcunov static void *children_seq_next(struct seq_file *seq, void *v, loff_t *pos) 66981841161SCyrill Gorcunov { 67081841161SCyrill Gorcunov struct pid *pid; 67181841161SCyrill Gorcunov 67281841161SCyrill Gorcunov pid = get_children_pid(seq->private, v, *pos + 1); 67381841161SCyrill Gorcunov put_pid(v); 67481841161SCyrill Gorcunov 67581841161SCyrill Gorcunov ++*pos; 67681841161SCyrill Gorcunov return pid; 67781841161SCyrill Gorcunov } 67881841161SCyrill Gorcunov 67981841161SCyrill Gorcunov static void children_seq_stop(struct seq_file *seq, void *v) 68081841161SCyrill Gorcunov { 68181841161SCyrill Gorcunov put_pid(v); 68281841161SCyrill Gorcunov } 68381841161SCyrill Gorcunov 68481841161SCyrill Gorcunov static const struct seq_operations children_seq_ops = { 68581841161SCyrill Gorcunov .start = children_seq_start, 68681841161SCyrill Gorcunov .next = children_seq_next, 68781841161SCyrill Gorcunov .stop = children_seq_stop, 68881841161SCyrill Gorcunov .show = children_seq_show, 68981841161SCyrill Gorcunov }; 69081841161SCyrill Gorcunov 69181841161SCyrill Gorcunov static int children_seq_open(struct inode *inode, struct file *file) 69281841161SCyrill Gorcunov { 69381841161SCyrill Gorcunov struct seq_file *m; 69481841161SCyrill Gorcunov int ret; 69581841161SCyrill Gorcunov 69681841161SCyrill Gorcunov ret = seq_open(file, &children_seq_ops); 69781841161SCyrill Gorcunov if (ret) 69881841161SCyrill Gorcunov return ret; 69981841161SCyrill Gorcunov 70081841161SCyrill Gorcunov m = file->private_data; 70181841161SCyrill Gorcunov m->private = inode; 70281841161SCyrill Gorcunov 70381841161SCyrill Gorcunov return ret; 70481841161SCyrill Gorcunov } 70581841161SCyrill Gorcunov 70681841161SCyrill Gorcunov int children_seq_release(struct inode *inode, struct file *file) 70781841161SCyrill Gorcunov { 70881841161SCyrill Gorcunov seq_release(inode, file); 70981841161SCyrill Gorcunov return 0; 71081841161SCyrill Gorcunov } 71181841161SCyrill Gorcunov 71281841161SCyrill Gorcunov const struct file_operations proc_tid_children_operations = { 71381841161SCyrill Gorcunov .open = children_seq_open, 71481841161SCyrill Gorcunov .read = seq_read, 71581841161SCyrill Gorcunov .llseek = seq_lseek, 71681841161SCyrill Gorcunov .release = children_seq_release, 71781841161SCyrill Gorcunov }; 7182e13ba54SIago López Galeiras #endif /* CONFIG_PROC_CHILDREN */ 719