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> 863e42979eSRichard W.M. Jones #include <linux/fs_struct.h> 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds #include <asm/pgtable.h> 891da177e4SLinus Torvalds #include <asm/processor.h> 901da177e4SLinus Torvalds #include "internal.h" 911da177e4SLinus Torvalds 92df5f8314SEric W. Biederman static inline void task_name(struct seq_file *m, struct task_struct *p) 931da177e4SLinus Torvalds { 94edc924e0SAndy Shevchenko char *buf; 953a49f3d2SAndy Shevchenko size_t size; 961da177e4SLinus Torvalds char tcomm[sizeof(p->comm)]; 973a49f3d2SAndy Shevchenko int ret; 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds get_task_comm(tcomm, p); 1001da177e4SLinus Torvalds 1019d6de12fSAlexey Dobriyan seq_puts(m, "Name:\t"); 102edc924e0SAndy Shevchenko 1033a49f3d2SAndy Shevchenko size = seq_get_buf(m, &buf); 1043a49f3d2SAndy Shevchenko ret = string_escape_str(tcomm, buf, size, ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\"); 1053a49f3d2SAndy Shevchenko seq_commit(m, ret < size ? ret : -1); 106edc924e0SAndy Shevchenko 1079d6de12fSAlexey Dobriyan seq_putc(m, '\n'); 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds /* 1111da177e4SLinus Torvalds * The task state array is a strange "bitmap" of 1121da177e4SLinus Torvalds * reasons to sleep. Thus "running" is zero, and 1131da177e4SLinus Torvalds * you can test for combinations of others with 1141da177e4SLinus Torvalds * simple bit tests. 1151da177e4SLinus Torvalds */ 116e130aa70SMike Frysinger static const char * const task_state_array[] = { 1171da177e4SLinus Torvalds "R (running)", /* 0 */ 1181da177e4SLinus Torvalds "S (sleeping)", /* 1 */ 1191da177e4SLinus Torvalds "D (disk sleep)", /* 2 */ 1201da177e4SLinus Torvalds "T (stopped)", /* 4 */ 121464763cfSPeter Zijlstra "t (tracing stop)", /* 8 */ 122ad86622bSOleg Nesterov "X (dead)", /* 16 */ 123ad86622bSOleg Nesterov "Z (zombie)", /* 32 */ 1241da177e4SLinus Torvalds }; 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds static inline const char *get_task_state(struct task_struct *tsk) 1271da177e4SLinus Torvalds { 12874e37200SOleg Nesterov unsigned int state = (tsk->state | tsk->exit_state) & TASK_REPORT; 129e1781538SPeter Zijlstra 130f51c0eaeSChris Metcalf /* 131f51c0eaeSChris Metcalf * Parked tasks do not run; they sit in __kthread_parkme(). 132f51c0eaeSChris Metcalf * Without this check, we would report them as running, which is 133f51c0eaeSChris Metcalf * clearly wrong, so we report them as sleeping instead. 134f51c0eaeSChris Metcalf */ 135f51c0eaeSChris Metcalf if (tsk->state == TASK_PARKED) 136f51c0eaeSChris Metcalf state = TASK_INTERRUPTIBLE; 137f51c0eaeSChris Metcalf 13874e37200SOleg Nesterov BUILD_BUG_ON(1 + ilog2(TASK_REPORT) != ARRAY_SIZE(task_state_array)-1); 1391da177e4SLinus Torvalds 14074e37200SOleg Nesterov return task_state_array[fls(state)]; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1433e42979eSRichard W.M. Jones static inline int get_task_umask(struct task_struct *tsk) 1443e42979eSRichard W.M. Jones { 1453e42979eSRichard W.M. Jones struct fs_struct *fs; 1463e42979eSRichard W.M. Jones int umask = -ENOENT; 1473e42979eSRichard W.M. Jones 1483e42979eSRichard W.M. Jones task_lock(tsk); 1493e42979eSRichard W.M. Jones fs = tsk->fs; 1503e42979eSRichard W.M. Jones if (fs) 1513e42979eSRichard W.M. Jones umask = fs->umask; 1523e42979eSRichard W.M. Jones task_unlock(tsk); 1533e42979eSRichard W.M. Jones return umask; 1543e42979eSRichard W.M. Jones } 1553e42979eSRichard W.M. Jones 156df5f8314SEric W. Biederman static inline void task_state(struct seq_file *m, struct pid_namespace *ns, 157df5f8314SEric W. Biederman struct pid *pid, struct task_struct *p) 1581da177e4SLinus Torvalds { 159e9f238c3SEric W. Biederman struct user_namespace *user_ns = seq_user_ns(m); 1601da177e4SLinus Torvalds struct group_info *group_info; 1613e42979eSRichard W.M. Jones int g, umask; 162abdba6e9SOleg Nesterov struct task_struct *tracer; 163c69e8d9cSDavid Howells const struct cred *cred; 164abdba6e9SOleg Nesterov pid_t ppid, tpid = 0, tgid, ngid; 1650f4a0d53SOleg Nesterov unsigned int max_fds = 0; 1661da177e4SLinus Torvalds 167b0fa9db6SOleg Nesterov rcu_read_lock(); 168b488893aSPavel Emelyanov ppid = pid_alive(p) ? 169b488893aSPavel Emelyanov task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0; 170abdba6e9SOleg Nesterov 171abdba6e9SOleg Nesterov tracer = ptrace_parent(p); 1720d094efeSRoland McGrath if (tracer) 1730d094efeSRoland McGrath tpid = task_pid_nr_ns(tracer, ns); 174b0fafc11SOleg Nesterov 175b0fafc11SOleg Nesterov tgid = task_tgid_nr_ns(p, ns); 176b0fafc11SOleg Nesterov ngid = task_numa_group_id(p); 177de09a977SDavid Howells cred = get_task_cred(p); 1780f4a0d53SOleg Nesterov 1793e42979eSRichard W.M. Jones umask = get_task_umask(p); 1803e42979eSRichard W.M. Jones if (umask >= 0) 1813e42979eSRichard W.M. Jones seq_printf(m, "Umask:\t%#04o\n", umask); 1823e42979eSRichard W.M. Jones 1830f4a0d53SOleg Nesterov task_lock(p); 1840f4a0d53SOleg Nesterov if (p->files) 1850f4a0d53SOleg Nesterov max_fds = files_fdtable(p->files)->max_fds; 1860f4a0d53SOleg Nesterov task_unlock(p); 187b0fafc11SOleg Nesterov rcu_read_unlock(); 1880f4a0d53SOleg Nesterov 189df5f8314SEric W. Biederman seq_printf(m, 1901da177e4SLinus Torvalds "State:\t%s\n" 1911da177e4SLinus Torvalds "Tgid:\t%d\n" 192e29cf08bSMel Gorman "Ngid:\t%d\n" 1931da177e4SLinus Torvalds "Pid:\t%d\n" 1941da177e4SLinus Torvalds "PPid:\t%d\n" 1951da177e4SLinus Torvalds "TracerPid:\t%d\n" 1961da177e4SLinus Torvalds "Uid:\t%d\t%d\t%d\t%d\n" 1970f4a0d53SOleg Nesterov "Gid:\t%d\t%d\t%d\t%d\n" 1980f4a0d53SOleg Nesterov "FDSize:\t%d\nGroups:\t", 1991da177e4SLinus Torvalds get_task_state(p), 200b0fafc11SOleg Nesterov tgid, ngid, pid_nr_ns(pid, ns), ppid, tpid, 201dcb0f222SEric W. Biederman from_kuid_munged(user_ns, cred->uid), 202dcb0f222SEric W. Biederman from_kuid_munged(user_ns, cred->euid), 203dcb0f222SEric W. Biederman from_kuid_munged(user_ns, cred->suid), 204dcb0f222SEric W. Biederman from_kuid_munged(user_ns, cred->fsuid), 205dcb0f222SEric W. Biederman from_kgid_munged(user_ns, cred->gid), 206dcb0f222SEric W. Biederman from_kgid_munged(user_ns, cred->egid), 207dcb0f222SEric W. Biederman from_kgid_munged(user_ns, cred->sgid), 2080f4a0d53SOleg Nesterov from_kgid_munged(user_ns, cred->fsgid), 2090f4a0d53SOleg Nesterov max_fds); 2101da177e4SLinus Torvalds 211c69e8d9cSDavid Howells group_info = cred->group_info; 2128d238027SArtem Bityutskiy for (g = 0; g < group_info->ngroups; g++) 213ae2975bcSEric W. Biederman seq_printf(m, "%d ", 214ae2975bcSEric W. Biederman from_kgid_munged(user_ns, GROUP_AT(group_info, g))); 215c69e8d9cSDavid Howells put_cred(cred); 2161da177e4SLinus Torvalds 217e4bc3324SChen Hanxiao #ifdef CONFIG_PID_NS 218e4bc3324SChen Hanxiao seq_puts(m, "\nNStgid:"); 219e4bc3324SChen Hanxiao for (g = ns->level; g <= pid->level; g++) 220e4bc3324SChen Hanxiao seq_printf(m, "\t%d", 221e4bc3324SChen Hanxiao task_tgid_nr_ns(p, pid->numbers[g].ns)); 222e4bc3324SChen Hanxiao seq_puts(m, "\nNSpid:"); 223e4bc3324SChen Hanxiao for (g = ns->level; g <= pid->level; g++) 224e4bc3324SChen Hanxiao seq_printf(m, "\t%d", 225e4bc3324SChen Hanxiao task_pid_nr_ns(p, pid->numbers[g].ns)); 226e4bc3324SChen Hanxiao seq_puts(m, "\nNSpgid:"); 227e4bc3324SChen Hanxiao for (g = ns->level; g <= pid->level; g++) 228e4bc3324SChen Hanxiao seq_printf(m, "\t%d", 229e4bc3324SChen Hanxiao task_pgrp_nr_ns(p, pid->numbers[g].ns)); 230e4bc3324SChen Hanxiao seq_puts(m, "\nNSsid:"); 231e4bc3324SChen Hanxiao for (g = ns->level; g <= pid->level; g++) 232e4bc3324SChen Hanxiao seq_printf(m, "\t%d", 233e4bc3324SChen Hanxiao task_session_nr_ns(p, pid->numbers[g].ns)); 234e4bc3324SChen Hanxiao #endif 2359d6de12fSAlexey Dobriyan seq_putc(m, '\n'); 2361da177e4SLinus Torvalds } 2371da177e4SLinus Torvalds 238138d22b5SCyrill Gorcunov void render_sigset_t(struct seq_file *m, const char *header, 239df5f8314SEric W. Biederman sigset_t *set) 2401da177e4SLinus Torvalds { 241df5f8314SEric W. Biederman int i; 2421da177e4SLinus Torvalds 2439d6de12fSAlexey Dobriyan seq_puts(m, header); 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds i = _NSIG; 2461da177e4SLinus Torvalds do { 2471da177e4SLinus Torvalds int x = 0; 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds i -= 4; 2501da177e4SLinus Torvalds if (sigismember(set, i+1)) x |= 1; 2511da177e4SLinus Torvalds if (sigismember(set, i+2)) x |= 2; 2521da177e4SLinus Torvalds if (sigismember(set, i+3)) x |= 4; 2531da177e4SLinus Torvalds if (sigismember(set, i+4)) x |= 8; 254df5f8314SEric W. Biederman seq_printf(m, "%x", x); 2551da177e4SLinus Torvalds } while (i >= 4); 2561da177e4SLinus Torvalds 2579d6de12fSAlexey Dobriyan seq_putc(m, '\n'); 2581da177e4SLinus Torvalds } 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign, 2611da177e4SLinus Torvalds sigset_t *catch) 2621da177e4SLinus Torvalds { 2631da177e4SLinus Torvalds struct k_sigaction *k; 2641da177e4SLinus Torvalds int i; 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds k = p->sighand->action; 2671da177e4SLinus Torvalds for (i = 1; i <= _NSIG; ++i, ++k) { 2681da177e4SLinus Torvalds if (k->sa.sa_handler == SIG_IGN) 2691da177e4SLinus Torvalds sigaddset(ign, i); 2701da177e4SLinus Torvalds else if (k->sa.sa_handler != SIG_DFL) 2711da177e4SLinus Torvalds sigaddset(catch, i); 2721da177e4SLinus Torvalds } 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 275df5f8314SEric W. Biederman static inline void task_sig(struct seq_file *m, struct task_struct *p) 2761da177e4SLinus Torvalds { 2775e6b3f42SOleg Nesterov unsigned long flags; 2781da177e4SLinus Torvalds sigset_t pending, shpending, blocked, ignored, caught; 2791da177e4SLinus Torvalds int num_threads = 0; 2801da177e4SLinus Torvalds unsigned long qsize = 0; 2811da177e4SLinus Torvalds unsigned long qlim = 0; 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds sigemptyset(&pending); 2841da177e4SLinus Torvalds sigemptyset(&shpending); 2851da177e4SLinus Torvalds sigemptyset(&blocked); 2861da177e4SLinus Torvalds sigemptyset(&ignored); 2871da177e4SLinus Torvalds sigemptyset(&caught); 2881da177e4SLinus Torvalds 2895e6b3f42SOleg Nesterov if (lock_task_sighand(p, &flags)) { 2901da177e4SLinus Torvalds pending = p->pending.signal; 2911da177e4SLinus Torvalds shpending = p->signal->shared_pending.signal; 2921da177e4SLinus Torvalds blocked = p->blocked; 2931da177e4SLinus Torvalds collect_sigign_sigcatch(p, &ignored, &caught); 2947e49827cSOleg Nesterov num_threads = get_nr_threads(p); 2957dc52157SPaul E. McKenney rcu_read_lock(); /* FIXME: is this correct? */ 296c69e8d9cSDavid Howells qsize = atomic_read(&__task_cred(p)->user->sigpending); 2977dc52157SPaul E. McKenney rcu_read_unlock(); 298d554ed89SJiri Slaby qlim = task_rlimit(p, RLIMIT_SIGPENDING); 2995e6b3f42SOleg Nesterov unlock_task_sighand(p, &flags); 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds 302df5f8314SEric W. Biederman seq_printf(m, "Threads:\t%d\n", num_threads); 303df5f8314SEric W. Biederman seq_printf(m, "SigQ:\t%lu/%lu\n", qsize, qlim); 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds /* render them all */ 306df5f8314SEric W. Biederman render_sigset_t(m, "SigPnd:\t", &pending); 307df5f8314SEric W. Biederman render_sigset_t(m, "ShdPnd:\t", &shpending); 308df5f8314SEric W. Biederman render_sigset_t(m, "SigBlk:\t", &blocked); 309df5f8314SEric W. Biederman render_sigset_t(m, "SigIgn:\t", &ignored); 310df5f8314SEric W. Biederman render_sigset_t(m, "SigCgt:\t", &caught); 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds 313df5f8314SEric W. Biederman static void render_cap_t(struct seq_file *m, const char *header, 314df5f8314SEric W. Biederman kernel_cap_t *a) 315e338d263SAndrew Morgan { 316e338d263SAndrew Morgan unsigned __capi; 317e338d263SAndrew Morgan 3189d6de12fSAlexey Dobriyan seq_puts(m, header); 319e338d263SAndrew Morgan CAP_FOR_EACH_U32(__capi) { 320df5f8314SEric W. Biederman seq_printf(m, "%08x", 3217d8b6c63SEric Paris a->cap[CAP_LAST_U32 - __capi]); 322e338d263SAndrew Morgan } 3239d6de12fSAlexey Dobriyan seq_putc(m, '\n'); 324e338d263SAndrew Morgan } 325e338d263SAndrew Morgan 326df5f8314SEric W. Biederman static inline void task_cap(struct seq_file *m, struct task_struct *p) 3271da177e4SLinus Torvalds { 328c69e8d9cSDavid Howells const struct cred *cred; 32958319057SAndy Lutomirski kernel_cap_t cap_inheritable, cap_permitted, cap_effective, 33058319057SAndy Lutomirski cap_bset, cap_ambient; 331b6dff3ecSDavid Howells 332c69e8d9cSDavid Howells rcu_read_lock(); 333c69e8d9cSDavid Howells cred = __task_cred(p); 334c69e8d9cSDavid Howells cap_inheritable = cred->cap_inheritable; 335c69e8d9cSDavid Howells cap_permitted = cred->cap_permitted; 336c69e8d9cSDavid Howells cap_effective = cred->cap_effective; 337c69e8d9cSDavid Howells cap_bset = cred->cap_bset; 33858319057SAndy Lutomirski cap_ambient = cred->cap_ambient; 339c69e8d9cSDavid Howells rcu_read_unlock(); 340c69e8d9cSDavid Howells 341c69e8d9cSDavid Howells render_cap_t(m, "CapInh:\t", &cap_inheritable); 342c69e8d9cSDavid Howells render_cap_t(m, "CapPrm:\t", &cap_permitted); 343c69e8d9cSDavid Howells render_cap_t(m, "CapEff:\t", &cap_effective); 344c69e8d9cSDavid Howells render_cap_t(m, "CapBnd:\t", &cap_bset); 34558319057SAndy Lutomirski render_cap_t(m, "CapAmb:\t", &cap_ambient); 3461da177e4SLinus Torvalds } 3471da177e4SLinus Torvalds 3482f4b3bf6SKees Cook static inline void task_seccomp(struct seq_file *m, struct task_struct *p) 3492f4b3bf6SKees Cook { 3502f4b3bf6SKees Cook #ifdef CONFIG_SECCOMP 3512f4b3bf6SKees Cook seq_printf(m, "Seccomp:\t%d\n", p->seccomp.mode); 3522f4b3bf6SKees Cook #endif 3532f4b3bf6SKees Cook } 3542f4b3bf6SKees Cook 355df5f8314SEric W. Biederman static inline void task_context_switch_counts(struct seq_file *m, 356df5f8314SEric W. Biederman struct task_struct *p) 357b663a79cSMaxim Uvarov { 358df5f8314SEric W. Biederman seq_printf(m, "voluntary_ctxt_switches:\t%lu\n" 359b663a79cSMaxim Uvarov "nonvoluntary_ctxt_switches:\t%lu\n", 360b663a79cSMaxim Uvarov p->nvcsw, 361b663a79cSMaxim Uvarov p->nivcsw); 362b663a79cSMaxim Uvarov } 363b663a79cSMaxim Uvarov 364d01d4827SHeiko Carstens static void task_cpus_allowed(struct seq_file *m, struct task_struct *task) 365d01d4827SHeiko Carstens { 366a0c2e07dSTejun Heo seq_printf(m, "Cpus_allowed:\t%*pb\n", 367a0c2e07dSTejun Heo cpumask_pr_args(&task->cpus_allowed)); 368a0c2e07dSTejun Heo seq_printf(m, "Cpus_allowed_list:\t%*pbl\n", 369a0c2e07dSTejun Heo cpumask_pr_args(&task->cpus_allowed)); 370d01d4827SHeiko Carstens } 371d01d4827SHeiko Carstens 372df5f8314SEric W. Biederman int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, 373df5f8314SEric W. Biederman struct pid *pid, struct task_struct *task) 3741da177e4SLinus Torvalds { 3751da177e4SLinus Torvalds struct mm_struct *mm = get_task_mm(task); 3761da177e4SLinus Torvalds 377df5f8314SEric W. Biederman task_name(m, task); 378df5f8314SEric W. Biederman task_state(m, ns, pid, task); 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds if (mm) { 381df5f8314SEric W. Biederman task_mem(m, mm); 3821da177e4SLinus Torvalds mmput(mm); 3831da177e4SLinus Torvalds } 384df5f8314SEric W. Biederman task_sig(m, task); 385df5f8314SEric W. Biederman task_cap(m, task); 3862f4b3bf6SKees Cook task_seccomp(m, task); 387d01d4827SHeiko Carstens task_cpus_allowed(m, task); 388df5f8314SEric W. Biederman cpuset_task_status_allowed(m, task); 389df5f8314SEric W. Biederman task_context_switch_counts(m, task); 390df5f8314SEric W. Biederman return 0; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds 393ee992744SEric W. Biederman static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, 394ee992744SEric W. Biederman struct pid *pid, struct task_struct *task, int whole) 3951da177e4SLinus Torvalds { 396b2f73922SIngo Molnar unsigned long vsize, eip, esp, wchan = 0; 397715be1fcSJan Engelhardt int priority, nice; 3981da177e4SLinus Torvalds int tty_pgrp = -1, tty_nr = 0; 3991da177e4SLinus Torvalds sigset_t sigign, sigcatch; 4001da177e4SLinus Torvalds char state; 401a593d6edSOleg Nesterov pid_t ppid = 0, pgid = -1, sid = -1; 4021da177e4SLinus Torvalds int num_threads = 0; 403f83ce3e6SJake Edge int permitted; 4041da177e4SLinus Torvalds struct mm_struct *mm; 4051da177e4SLinus Torvalds unsigned long long start_time; 4061da177e4SLinus Torvalds unsigned long cmin_flt = 0, cmaj_flt = 0; 4071da177e4SLinus Torvalds unsigned long min_flt = 0, maj_flt = 0; 408efe567fcSChristian Borntraeger cputime_t cutime, cstime, utime, stime; 4099ac52315SLaurent Vivier cputime_t cgtime, gtime; 4101da177e4SLinus Torvalds unsigned long rsslim = 0; 4111da177e4SLinus Torvalds char tcomm[sizeof(task->comm)]; 412a593d6edSOleg Nesterov unsigned long flags; 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds state = *get_task_state(task); 4151da177e4SLinus Torvalds vsize = eip = esp = 0; 416caaee623SJann Horn permitted = ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS | PTRACE_MODE_NOAUDIT); 4171da177e4SLinus Torvalds mm = get_task_mm(task); 4181da177e4SLinus Torvalds if (mm) { 4191da177e4SLinus Torvalds vsize = task_vsize(mm); 420f83ce3e6SJake Edge if (permitted) { 4211da177e4SLinus Torvalds eip = KSTK_EIP(task); 4221da177e4SLinus Torvalds esp = KSTK_ESP(task); 4231da177e4SLinus Torvalds } 424f83ce3e6SJake Edge } 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds get_task_comm(tcomm, task); 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds sigemptyset(&sigign); 4291da177e4SLinus Torvalds sigemptyset(&sigcatch); 43064861634SMartin Schwidefsky cutime = cstime = utime = stime = 0; 43164861634SMartin Schwidefsky cgtime = gtime = 0; 4323cfd0885SAlan Cox 433a593d6edSOleg Nesterov if (lock_task_sighand(task, &flags)) { 434a593d6edSOleg Nesterov struct signal_struct *sig = task->signal; 435a593d6edSOleg Nesterov 43691593504SOleg Nesterov if (sig->tty) { 4375d0fdf1eSAlan Cox struct pid *pgrp = tty_get_pgrp(sig->tty); 4385d0fdf1eSAlan Cox tty_pgrp = pid_nr_ns(pgrp, ns); 4395d0fdf1eSAlan Cox put_pid(pgrp); 44091593504SOleg Nesterov tty_nr = new_encode_dev(tty_devnum(sig->tty)); 441a593d6edSOleg Nesterov } 442a593d6edSOleg Nesterov 4437e49827cSOleg Nesterov num_threads = get_nr_threads(task); 4441da177e4SLinus Torvalds collect_sigign_sigcatch(task, &sigign, &sigcatch); 4451da177e4SLinus Torvalds 446a593d6edSOleg Nesterov cmin_flt = sig->cmin_flt; 447a593d6edSOleg Nesterov cmaj_flt = sig->cmaj_flt; 448a593d6edSOleg Nesterov cutime = sig->cutime; 449a593d6edSOleg Nesterov cstime = sig->cstime; 4509ac52315SLaurent Vivier cgtime = sig->cgtime; 451d554ed89SJiri Slaby rsslim = ACCESS_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur); 452a593d6edSOleg Nesterov 4531da177e4SLinus Torvalds /* add up live thread stats at the group level */ 4541da177e4SLinus Torvalds if (whole) { 455a593d6edSOleg Nesterov struct task_struct *t = task; 4561da177e4SLinus Torvalds do { 4571da177e4SLinus Torvalds min_flt += t->min_flt; 4581da177e4SLinus Torvalds maj_flt += t->maj_flt; 4596fac4829SFrederic Weisbecker gtime += task_gtime(t); 460185ee40eSOleg Nesterov } while_each_thread(task, t); 461a593d6edSOleg Nesterov 462a593d6edSOleg Nesterov min_flt += sig->min_flt; 463a593d6edSOleg Nesterov maj_flt += sig->maj_flt; 464e80d0a1aSFrederic Weisbecker thread_group_cputime_adjusted(task, &utime, &stime); 46564861634SMartin Schwidefsky gtime += sig->gtime; 4661da177e4SLinus Torvalds } 4671da177e4SLinus Torvalds 468b488893aSPavel Emelyanov sid = task_session_nr_ns(task, ns); 469a98fdcefSOleg Nesterov ppid = task_tgid_nr_ns(task->real_parent, ns); 470b488893aSPavel Emelyanov pgid = task_pgrp_nr_ns(task, ns); 471a593d6edSOleg Nesterov 472a593d6edSOleg Nesterov unlock_task_sighand(task, &flags); 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds 475f83ce3e6SJake Edge if (permitted && (!whole || num_threads < 2)) 4761da177e4SLinus Torvalds wchan = get_wchan(task); 4771da177e4SLinus Torvalds if (!whole) { 4781da177e4SLinus Torvalds min_flt = task->min_flt; 4791da177e4SLinus Torvalds maj_flt = task->maj_flt; 480e80d0a1aSFrederic Weisbecker task_cputime_adjusted(task, &utime, &stime); 4816fac4829SFrederic Weisbecker gtime = task_gtime(task); 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 4841da177e4SLinus Torvalds /* scale priority and nice values from timeslices to -20..20 */ 4851da177e4SLinus Torvalds /* to make it look like a "normal" Unix priority/nice value */ 4861da177e4SLinus Torvalds priority = task_prio(task); 4871da177e4SLinus Torvalds nice = task_nice(task); 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds /* convert nsec -> ticks */ 49057e0be04SThomas Gleixner start_time = nsec_to_clock_t(task->real_start_time); 4911da177e4SLinus Torvalds 492bda7bad6SKAMEZAWA Hiroyuki seq_printf(m, "%d (%s) %c", pid_nr_ns(pid, ns), tcomm, state); 493bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', ppid); 494bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', pgid); 495bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', sid); 496bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', tty_nr); 497bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', tty_pgrp); 498bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', task->flags); 499bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', min_flt); 500bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', cmin_flt); 501bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', maj_flt); 502bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', cmaj_flt); 503bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', cputime_to_clock_t(utime)); 504bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', cputime_to_clock_t(stime)); 505bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cutime)); 506bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cstime)); 507bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', priority); 508bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', nice); 509bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', num_threads); 510bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', 0); 511bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', start_time); 512bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', vsize); 513715be1fcSJan Engelhardt seq_put_decimal_ull(m, ' ', mm ? get_mm_rss(mm) : 0); 514bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', rsslim); 515bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->start_code : 1) : 0); 516bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', mm ? (permitted ? mm->end_code : 1) : 0); 517bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', (permitted && mm) ? mm->start_stack : 0); 518bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', esp); 519bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', eip); 5201da177e4SLinus Torvalds /* The signal information here is obsolete. 5211da177e4SLinus Torvalds * It must be decimal for Linux 2.0 compatibility. 5221da177e4SLinus Torvalds * Use /proc/#/status for real-time signals. 5231da177e4SLinus Torvalds */ 524bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', task->pending.signal.sig[0] & 0x7fffffffUL); 525bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', task->blocked.sig[0] & 0x7fffffffUL); 526bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', sigign.sig[0] & 0x7fffffffUL); 527bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', sigcatch.sig[0] & 0x7fffffffUL); 528b2f73922SIngo Molnar 529b2f73922SIngo Molnar /* 530b2f73922SIngo Molnar * We used to output the absolute kernel address, but that's an 531b2f73922SIngo Molnar * information leak - so instead we show a 0/1 flag here, to signal 532b2f73922SIngo Molnar * to user-space whether there's a wchan field in /proc/PID/wchan. 533b2f73922SIngo Molnar * 534b2f73922SIngo Molnar * This works with older implementations of procps as well. 535b2f73922SIngo Molnar */ 536b2f73922SIngo Molnar if (wchan) 537b2f73922SIngo Molnar seq_puts(m, " 1"); 538b2f73922SIngo Molnar else 539b2f73922SIngo Molnar seq_puts(m, " 0"); 540b2f73922SIngo Molnar 541bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', 0); 542bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', 0); 543bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', task->exit_signal); 544bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', task_cpu(task)); 545bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', task->rt_priority); 546bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', task->policy); 547bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', delayacct_blkio_ticks(task)); 548bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', cputime_to_clock_t(gtime)); 549bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ll(m, ' ', cputime_to_clock_t(cgtime)); 5505b172087SCyrill Gorcunov 5515b172087SCyrill Gorcunov if (mm && permitted) { 5525b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->start_data); 5535b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->end_data); 5545b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->start_brk); 5555b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->arg_start); 5565b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->arg_end); 5575b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->env_start); 5585b172087SCyrill Gorcunov seq_put_decimal_ull(m, ' ', mm->env_end); 5595b172087SCyrill Gorcunov } else 5605b172087SCyrill Gorcunov seq_printf(m, " 0 0 0 0 0 0 0"); 5615b172087SCyrill Gorcunov 5625b172087SCyrill Gorcunov if (permitted) 5635b172087SCyrill Gorcunov seq_put_decimal_ll(m, ' ', task->exit_code); 5645b172087SCyrill Gorcunov else 5655b172087SCyrill Gorcunov seq_put_decimal_ll(m, ' ', 0); 5665b172087SCyrill Gorcunov 567bda7bad6SKAMEZAWA Hiroyuki seq_putc(m, '\n'); 5681da177e4SLinus Torvalds if (mm) 5691da177e4SLinus Torvalds mmput(mm); 570ee992744SEric W. Biederman return 0; 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds 573ee992744SEric W. Biederman int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns, 574ee992744SEric W. Biederman struct pid *pid, struct task_struct *task) 5751da177e4SLinus Torvalds { 576ee992744SEric W. Biederman return do_task_stat(m, ns, pid, task, 0); 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds 579ee992744SEric W. Biederman int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, 580ee992744SEric W. Biederman struct pid *pid, struct task_struct *task) 5811da177e4SLinus Torvalds { 582ee992744SEric W. Biederman return do_task_stat(m, ns, pid, task, 1); 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds 585a56d3fc7SEric W. Biederman int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, 586a56d3fc7SEric W. Biederman struct pid *pid, struct task_struct *task) 5871da177e4SLinus Torvalds { 588a2ade7b6SAlexey Dobriyan unsigned long size = 0, resident = 0, shared = 0, text = 0, data = 0; 5891da177e4SLinus Torvalds struct mm_struct *mm = get_task_mm(task); 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds if (mm) { 5921da177e4SLinus Torvalds size = task_statm(mm, &shared, &text, &data, &resident); 5931da177e4SLinus Torvalds mmput(mm); 5941da177e4SLinus Torvalds } 595bda7bad6SKAMEZAWA Hiroyuki /* 596bda7bad6SKAMEZAWA Hiroyuki * For quick read, open code by putting numbers directly 597bda7bad6SKAMEZAWA Hiroyuki * expected format is 598bda7bad6SKAMEZAWA Hiroyuki * seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n", 599bda7bad6SKAMEZAWA Hiroyuki * size, resident, shared, text, data); 600bda7bad6SKAMEZAWA Hiroyuki */ 601bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, 0, size); 602bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', resident); 603bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', shared); 604bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', text); 605bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', 0); 6063748b2f1SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', data); 607bda7bad6SKAMEZAWA Hiroyuki seq_put_decimal_ull(m, ' ', 0); 608bda7bad6SKAMEZAWA Hiroyuki seq_putc(m, '\n'); 609a56d3fc7SEric W. Biederman 610a56d3fc7SEric W. Biederman return 0; 6111da177e4SLinus Torvalds } 61281841161SCyrill Gorcunov 6132e13ba54SIago López Galeiras #ifdef CONFIG_PROC_CHILDREN 61481841161SCyrill Gorcunov static struct pid * 61581841161SCyrill Gorcunov get_children_pid(struct inode *inode, struct pid *pid_prev, loff_t pos) 61681841161SCyrill Gorcunov { 61781841161SCyrill Gorcunov struct task_struct *start, *task; 61881841161SCyrill Gorcunov struct pid *pid = NULL; 61981841161SCyrill Gorcunov 62081841161SCyrill Gorcunov read_lock(&tasklist_lock); 62181841161SCyrill Gorcunov 62281841161SCyrill Gorcunov start = pid_task(proc_pid(inode), PIDTYPE_PID); 62381841161SCyrill Gorcunov if (!start) 62481841161SCyrill Gorcunov goto out; 62581841161SCyrill Gorcunov 62681841161SCyrill Gorcunov /* 62781841161SCyrill Gorcunov * Lets try to continue searching first, this gives 62881841161SCyrill Gorcunov * us significant speedup on children-rich processes. 62981841161SCyrill Gorcunov */ 63081841161SCyrill Gorcunov if (pid_prev) { 63181841161SCyrill Gorcunov task = pid_task(pid_prev, PIDTYPE_PID); 63281841161SCyrill Gorcunov if (task && task->real_parent == start && 63381841161SCyrill Gorcunov !(list_empty(&task->sibling))) { 63481841161SCyrill Gorcunov if (list_is_last(&task->sibling, &start->children)) 63581841161SCyrill Gorcunov goto out; 63681841161SCyrill Gorcunov task = list_first_entry(&task->sibling, 63781841161SCyrill Gorcunov struct task_struct, sibling); 63881841161SCyrill Gorcunov pid = get_pid(task_pid(task)); 63981841161SCyrill Gorcunov goto out; 64081841161SCyrill Gorcunov } 64181841161SCyrill Gorcunov } 64281841161SCyrill Gorcunov 64381841161SCyrill Gorcunov /* 64481841161SCyrill Gorcunov * Slow search case. 64581841161SCyrill Gorcunov * 64681841161SCyrill Gorcunov * We might miss some children here if children 64781841161SCyrill Gorcunov * are exited while we were not holding the lock, 64881841161SCyrill Gorcunov * but it was never promised to be accurate that 64981841161SCyrill Gorcunov * much. 65081841161SCyrill Gorcunov * 65181841161SCyrill Gorcunov * "Just suppose that the parent sleeps, but N children 65281841161SCyrill Gorcunov * exit after we printed their tids. Now the slow paths 65381841161SCyrill Gorcunov * skips N extra children, we miss N tasks." (c) 65481841161SCyrill Gorcunov * 65581841161SCyrill Gorcunov * So one need to stop or freeze the leader and all 65681841161SCyrill Gorcunov * its children to get a precise result. 65781841161SCyrill Gorcunov */ 65881841161SCyrill Gorcunov list_for_each_entry(task, &start->children, sibling) { 65981841161SCyrill Gorcunov if (pos-- == 0) { 66081841161SCyrill Gorcunov pid = get_pid(task_pid(task)); 66181841161SCyrill Gorcunov break; 66281841161SCyrill Gorcunov } 66381841161SCyrill Gorcunov } 66481841161SCyrill Gorcunov 66581841161SCyrill Gorcunov out: 66681841161SCyrill Gorcunov read_unlock(&tasklist_lock); 66781841161SCyrill Gorcunov return pid; 66881841161SCyrill Gorcunov } 66981841161SCyrill Gorcunov 67081841161SCyrill Gorcunov static int children_seq_show(struct seq_file *seq, void *v) 67181841161SCyrill Gorcunov { 67281841161SCyrill Gorcunov struct inode *inode = seq->private; 67381841161SCyrill Gorcunov pid_t pid; 67481841161SCyrill Gorcunov 67581841161SCyrill Gorcunov pid = pid_nr_ns(v, inode->i_sb->s_fs_info); 67625ce3191SJoe Perches seq_printf(seq, "%d ", pid); 67725ce3191SJoe Perches 67825ce3191SJoe Perches return 0; 67981841161SCyrill Gorcunov } 68081841161SCyrill Gorcunov 68181841161SCyrill Gorcunov static void *children_seq_start(struct seq_file *seq, loff_t *pos) 68281841161SCyrill Gorcunov { 68381841161SCyrill Gorcunov return get_children_pid(seq->private, NULL, *pos); 68481841161SCyrill Gorcunov } 68581841161SCyrill Gorcunov 68681841161SCyrill Gorcunov static void *children_seq_next(struct seq_file *seq, void *v, loff_t *pos) 68781841161SCyrill Gorcunov { 68881841161SCyrill Gorcunov struct pid *pid; 68981841161SCyrill Gorcunov 69081841161SCyrill Gorcunov pid = get_children_pid(seq->private, v, *pos + 1); 69181841161SCyrill Gorcunov put_pid(v); 69281841161SCyrill Gorcunov 69381841161SCyrill Gorcunov ++*pos; 69481841161SCyrill Gorcunov return pid; 69581841161SCyrill Gorcunov } 69681841161SCyrill Gorcunov 69781841161SCyrill Gorcunov static void children_seq_stop(struct seq_file *seq, void *v) 69881841161SCyrill Gorcunov { 69981841161SCyrill Gorcunov put_pid(v); 70081841161SCyrill Gorcunov } 70181841161SCyrill Gorcunov 70281841161SCyrill Gorcunov static const struct seq_operations children_seq_ops = { 70381841161SCyrill Gorcunov .start = children_seq_start, 70481841161SCyrill Gorcunov .next = children_seq_next, 70581841161SCyrill Gorcunov .stop = children_seq_stop, 70681841161SCyrill Gorcunov .show = children_seq_show, 70781841161SCyrill Gorcunov }; 70881841161SCyrill Gorcunov 70981841161SCyrill Gorcunov static int children_seq_open(struct inode *inode, struct file *file) 71081841161SCyrill Gorcunov { 71181841161SCyrill Gorcunov struct seq_file *m; 71281841161SCyrill Gorcunov int ret; 71381841161SCyrill Gorcunov 71481841161SCyrill Gorcunov ret = seq_open(file, &children_seq_ops); 71581841161SCyrill Gorcunov if (ret) 71681841161SCyrill Gorcunov return ret; 71781841161SCyrill Gorcunov 71881841161SCyrill Gorcunov m = file->private_data; 71981841161SCyrill Gorcunov m->private = inode; 72081841161SCyrill Gorcunov 72181841161SCyrill Gorcunov return ret; 72281841161SCyrill Gorcunov } 72381841161SCyrill Gorcunov 72481841161SCyrill Gorcunov int children_seq_release(struct inode *inode, struct file *file) 72581841161SCyrill Gorcunov { 72681841161SCyrill Gorcunov seq_release(inode, file); 72781841161SCyrill Gorcunov return 0; 72881841161SCyrill Gorcunov } 72981841161SCyrill Gorcunov 73081841161SCyrill Gorcunov const struct file_operations proc_tid_children_operations = { 73181841161SCyrill Gorcunov .open = children_seq_open, 73281841161SCyrill Gorcunov .read = seq_read, 73381841161SCyrill Gorcunov .llseek = seq_lseek, 73481841161SCyrill Gorcunov .release = children_seq_release, 73581841161SCyrill Gorcunov }; 7362e13ba54SIago López Galeiras #endif /* CONFIG_PROC_CHILDREN */ 737