| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Linus Torvalds (pre-git) | 1707 | 12.51% | 38 | 9.72% |
| Luis R. Rodriguez | 1061 | 7.78% | 5 | 1.28% |
| Hideaki Yoshifuji / 吉藤英明 | 792 | 5.80% | 2 | 0.51% |
| Art Haas | 743 | 5.45% | 1 | 0.26% |
| Eric W. Biedermann | 589 | 4.32% | 19 | 4.86% |
| Kees Cook | 570 | 4.18% | 11 | 2.81% |
| Américo Wang | 538 | 3.94% | 4 | 1.02% |
| Octavian Purdila | 488 | 3.58% | 1 | 0.26% |
| Andrew Morton | 419 | 3.07% | 19 | 4.86% |
| Ingo Molnar | 385 | 2.82% | 12 | 3.07% |
| Peter Zijlstra | 373 | 2.73% | 17 | 4.35% |
| Don Zickus | 278 | 2.04% | 8 | 2.05% |
| Andi Kleen | 249 | 1.82% | 6 | 1.53% |
| Al Viro | 203 | 1.49% | 10 | 2.56% |
| Steven Rostedt | 187 | 1.37% | 8 | 2.05% |
| Mel Gorman | 184 | 1.35% | 6 | 1.53% |
| Linus Torvalds | 173 | 1.27% | 12 | 3.07% |
| Christoph Lameter | 160 | 1.17% | 5 | 1.28% |
| David Rientjes | 143 | 1.05% | 5 | 1.28% |
| Arnaldo Carvalho de Melo | 136 | 1.00% | 5 | 1.28% |
| Joe Lawrence | 133 | 0.97% | 3 | 0.77% |
| Subash Abhinov Kasiviswanathan | 131 | 0.96% | 1 | 0.26% |
| Arjan van de Ven | 112 | 0.82% | 3 | 0.77% |
| Daniel Cashman | 112 | 0.82% | 1 | 0.26% |
| Yang Ruirui | 111 | 0.81% | 8 | 2.05% |
| Cédric Le Goater | 100 | 0.73% | 1 | 0.26% |
| Matthew Wilcox | 99 | 0.73% | 2 | 0.51% |
| Kirill Korotaev | 97 | 0.71% | 1 | 0.26% |
| Richard Weinberger | 89 | 0.65% | 1 | 0.26% |
| Dan Rosenberg | 87 | 0.64% | 2 | 0.51% |
| Salvatore Mesoraca | 86 | 0.63% | 1 | 0.26% |
| Mike Galbraith | 80 | 0.59% | 2 | 0.51% |
| Theodore Y. Ts'o | 75 | 0.55% | 2 | 0.51% |
| Dmitry Torokhov | 73 | 0.54% | 1 | 0.26% |
| Mandeep Singh Baines | 70 | 0.51% | 2 | 0.51% |
| Paul Mundt | 66 | 0.48% | 2 | 0.51% |
| Andrew Shewmaker | 62 | 0.45% | 2 | 0.51% |
| Willy Tarreau | 62 | 0.45% | 1 | 0.26% |
| Aaron Tomlin | 60 | 0.44% | 3 | 0.77% |
| Kamezawa Hiroyuki | 60 | 0.44% | 2 | 0.51% |
| Robert Love | 58 | 0.43% | 3 | 0.77% |
| Daniel Bristot de Oliveira | 56 | 0.41% | 1 | 0.26% |
| Petr Holasek | 56 | 0.41% | 1 | 0.26% |
| Alexander Popov | 55 | 0.40% | 1 | 0.26% |
| Srivatsa Vaddagiri | 54 | 0.40% | 1 | 0.26% |
| Masami Hiramatsu | 54 | 0.40% | 1 | 0.26% |
| Eric Paris | 52 | 0.38% | 3 | 0.77% |
| Alexei Starovoitov | 52 | 0.38% | 1 | 0.26% |
| Bron Gondwana | 50 | 0.37% | 1 | 0.26% |
| Thomas Gleixner | 49 | 0.36% | 3 | 0.77% |
| Johannes Weiner | 49 | 0.36% | 1 | 0.26% |
| Heinrich Schuchardt | 48 | 0.35% | 2 | 0.51% |
| Ulrich Obergfell | 47 | 0.34% | 1 | 0.26% |
| David Howells | 46 | 0.34% | 4 | 1.02% |
| Dave Hansen | 46 | 0.34% | 2 | 0.51% |
| Eric Dumazet | 46 | 0.34% | 5 | 1.28% |
| Dan Ballard | 45 | 0.33% | 1 | 0.26% |
| Prarit Bhargava | 43 | 0.32% | 1 | 0.26% |
| Paul Turner | 43 | 0.32% | 1 | 0.26% |
| Kemi Wang | 43 | 0.32% | 1 | 0.26% |
| Eric B Munson | 43 | 0.32% | 1 | 0.26% |
| Jiri Kosina | 43 | 0.32% | 1 | 0.26% |
| Nobuyuki Akiyama | 41 | 0.30% | 1 | 0.26% |
| Joe Perches | 40 | 0.29% | 3 | 0.77% |
| Nicholas Piggin | 39 | 0.29% | 1 | 0.26% |
| Dmitriy Vyukov | 39 | 0.29% | 1 | 0.26% |
| Lee Schermerhorn | 38 | 0.28% | 1 | 0.26% |
| David S. Miller | 38 | 0.28% | 2 | 0.51% |
| Rohit Seth | 38 | 0.28% | 1 | 0.26% |
| Neil Horman | 37 | 0.27% | 1 | 0.26% |
| Mitsuo Hayasaka | 36 | 0.26% | 1 | 0.26% |
| H. Peter Anvin | 35 | 0.26% | 2 | 0.51% |
| Doug Chapman | 34 | 0.25% | 1 | 0.26% |
| Jes Sorensen | 34 | 0.25% | 1 | 0.26% |
| Clark Williams | 33 | 0.24% | 2 | 0.51% |
| Davide Libenzi | 33 | 0.24% | 1 | 0.26% |
| Oleg Nesterov | 33 | 0.24% | 1 | 0.26% |
| Masoud Asgharifard Sharbiani | 33 | 0.24% | 1 | 0.26% |
| Jens Axboe | 32 | 0.23% | 2 | 0.51% |
| Alexey Dobriyan | 32 | 0.23% | 5 | 1.28% |
| Chuck Ebbert | 32 | 0.23% | 1 | 0.26% |
| Christian Ehrhardt | 32 | 0.23% | 2 | 0.51% |
| Jerome Marchand | 32 | 0.23% | 1 | 0.26% |
| Kurt Garloff | 31 | 0.23% | 1 | 0.26% |
| Pavel Machek | 30 | 0.22% | 2 | 0.51% |
| Jeremy Fitzhardinge | 29 | 0.21% | 1 | 0.26% |
| Eric Biggers | 29 | 0.21% | 2 | 0.51% |
| Martin Schwidefsky | 27 | 0.20% | 1 | 0.26% |
| Borislav Petkov | 27 | 0.20% | 1 | 0.26% |
| Alex Kelly | 27 | 0.20% | 1 | 0.26% |
| Hugh Dickins | 27 | 0.20% | 1 | 0.26% |
| Ravikiran G. Thirumalai | 25 | 0.18% | 1 | 0.26% |
| Chris Metcalf | 24 | 0.18% | 1 | 0.26% |
| Randy Dunlap | 23 | 0.17% | 7 | 1.79% |
| Vineet Gupta | 23 | 0.17% | 2 | 0.51% |
| Liu Hua | 22 | 0.16% | 1 | 0.26% |
| Andrew Lutomirski | 21 | 0.15% | 1 | 0.26% |
| Francesco Fusco | 21 | 0.15% | 1 | 0.26% |
| Nishanth Aravamudan | 21 | 0.15% | 2 | 0.51% |
| Serge E. Hallyn | 21 | 0.15% | 1 | 0.26% |
| Alan Cox | 17 | 0.12% | 2 | 0.51% |
| Bart Samwel | 17 | 0.12% | 2 | 0.51% |
| Thomas Petazzoni | 16 | 0.12% | 2 | 0.51% |
| Eric Brower | 13 | 0.10% | 1 | 0.26% |
| Li Zefan | 12 | 0.09% | 2 | 0.51% |
| Akinobu Mita | 12 | 0.09% | 1 | 0.26% |
| Myungho Jung | 12 | 0.09% | 1 | 0.26% |
| Len Brown | 11 | 0.08% | 2 | 0.51% |
| Andrea Righi | 11 | 0.08% | 1 | 0.26% |
| Sam Vilain | 10 | 0.07% | 1 | 0.26% |
| Junjiro R. Okajima | 8 | 0.06% | 1 | 0.26% |
| Sven Wegener | 8 | 0.06% | 1 | 0.26% |
| Kirill V Tkhai | 7 | 0.05% | 1 | 0.26% |
| Chen Gang S | 7 | 0.05% | 1 | 0.26% |
| Christoph Hellwig | 7 | 0.05% | 3 | 0.77% |
| Adrian Bunk | 6 | 0.04% | 2 | 0.51% |
| Kazuto Miyoshi | 6 | 0.04% | 1 | 0.26% |
| Knut Petersen | 6 | 0.04% | 1 | 0.26% |
| Ilya Dryomov | 5 | 0.04% | 1 | 0.26% |
| Michael Marineau | 5 | 0.04% | 1 | 0.26% |
| Kay Sievers | 5 | 0.04% | 2 | 0.51% |
| Nadia Yvette Chambers | 4 | 0.03% | 1 | 0.26% |
| Waiman Long | 4 | 0.03% | 1 | 0.26% |
| Arnd Bergmann | 3 | 0.02% | 1 | 0.26% |
| Catalin Marinas | 3 | 0.02% | 1 | 0.26% |
| Andrew G. Morgan | 3 | 0.02% | 1 | 0.26% |
| Russell King | 3 | 0.02% | 1 | 0.26% |
| Glauber de Oliveira Costa | 3 | 0.02% | 1 | 0.26% |
| Frédéric Weisbecker | 3 | 0.02% | 2 | 0.51% |
| Paul E. McKenney | 2 | 0.01% | 1 | 0.26% |
| Zach Brown | 2 | 0.01% | 1 | 0.26% |
| Hideo Aoki | 2 | 0.01% | 1 | 0.26% |
| David Chinner | 2 | 0.01% | 1 | 0.26% |
| Jovi Zhang | 2 | 0.01% | 1 | 0.26% |
| Rusty Russell | 2 | 0.01% | 1 | 0.26% |
| Dan Aloni | 1 | 0.01% | 1 | 0.26% |
| Ben Hutchings | 1 | 0.01% | 1 | 0.26% |
| Yong Zhang | 1 | 0.01% | 1 | 0.26% |
| Andy Whitcroft | 1 | 0.01% | 1 | 0.26% |
| Gao Feng | 1 | 0.01% | 1 | 0.26% |
| Pavel Emelyanov | 1 | 0.01% | 1 | 0.26% |
| Shile Zhang | 1 | 0.01% | 1 | 0.26% |
| Vince Weaver | 1 | 0.01% | 1 | 0.26% |
| Johannes Berg | 1 | 0.01% | 1 | 0.26% |
| Namhyung Kim | 1 | 0.01% | 1 | 0.26% |
| Heiko Carstens | 1 | 0.01% | 1 | 0.26% |
| Dipankar Sarma | 1 | 0.01% | 1 | 0.26% |
| Bastian Blank | 1 | 0.01% | 1 | 0.26% |
| Amy Griffis | 1 | 0.01% | 1 | 0.26% |
| Dave Young | 1 | 0.01% | 1 | 0.26% |
| Total | 13644 | 391 |
/* * sysctl.c: General linux system control interface * * Begun 24 March 1995, Stephen Tweedie * Added /proc support, Dec 1995 * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. * Dynamic registration fixes, Stephen Tweedie. * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris * Horn. * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill * Wendling. * The list_for_each() macro wasn't appropriate for the sysctl loop. * Removed it and replaced it with older style, 03/23/00, Bill Wendling */ #include <linux/module.h> #include <linux/aio.h> #include <linux/mm.h> #include <linux/swap.h> #include <linux/slab.h> #include <linux/sysctl.h> #include <linux/bitmap.h> #include <linux/signal.h> #include <linux/printk.h> #include <linux/proc_fs.h> #include <linux/security.h> #include <linux/ctype.h> #include <linux/kmemleak.h> #include <linux/fs.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/kobject.h> #include <linux/net.h> #include <linux/sysrq.h> #include <linux/highuid.h> #include <linux/writeback.h> #include <linux/ratelimit.h> #include <linux/compaction.h> #include <linux/hugetlb.h> #include <linux/initrd.h> #include <linux/key.h> #include <linux/times.h> #include <linux/limits.h> #include <linux/dcache.h> #include <linux/dnotify.h> #include <linux/syscalls.h> #include <linux/vmstat.h> #include <linux/nfs_fs.h> #include <linux/acpi.h> #include <linux/reboot.h> #include <linux/ftrace.h> #include <linux/perf_event.h> #include <linux/kprobes.h> #include <linux/pipe_fs_i.h> #include <linux/oom.h> #include <linux/kmod.h> #include <linux/capability.h> #include <linux/binfmts.h> #include <linux/sched/sysctl.h> #include <linux/sched/coredump.h> #include <linux/kexec.h> #include <linux/bpf.h> #include <linux/mount.h> #include <linux/uaccess.h> #include <asm/processor.h> #ifdef CONFIG_X86 #include <asm/nmi.h> #include <asm/stacktrace.h> #include <asm/io.h> #endif #ifdef CONFIG_SPARC #include <asm/setup.h> #endif #ifdef CONFIG_BSD_PROCESS_ACCT #include <linux/acct.h> #endif #ifdef CONFIG_RT_MUTEXES #include <linux/rtmutex.h> #endif #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) #include <linux/lockdep.h> #endif #ifdef CONFIG_CHR_DEV_SG #include <scsi/sg.h> #endif #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE #include <linux/stackleak.h> #endif #ifdef CONFIG_LOCKUP_DETECTOR #include <linux/nmi.h> #endif #if defined(CONFIG_SYSCTL) /* External variables not in a header file. */ extern int suid_dumpable; #ifdef CONFIG_COREDUMP extern int core_uses_pid; extern char core_pattern[]; extern unsigned int core_pipe_limit; #endif extern int pid_max; extern int pid_max_min, pid_max_max; extern int percpu_pagelist_fraction; extern int latencytop_enabled; extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max; #ifndef CONFIG_MMU extern int sysctl_nr_trim_pages; #endif /* Constants used for minimum and maximum */ #ifdef CONFIG_LOCKUP_DETECTOR static int sixty = 60; #endif static int __maybe_unused neg_one = -1; static int zero; static int __maybe_unused one = 1; static int __maybe_unused two = 2; static int __maybe_unused four = 4; static unsigned long one_ul = 1; static int one_hundred = 100; static int one_thousand = 1000; #ifdef CONFIG_PRINTK static int ten_thousand = 10000; #endif #ifdef CONFIG_PERF_EVENTS static int six_hundred_forty_kb = 640 * 1024; #endif /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ static int maxolduid = 65535; static int minolduid; static int ngroups_max = NGROUPS_MAX; static const int cap_last_cap = CAP_LAST_CAP; /* * This is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs * and hung_task_check_interval_secs */ #ifdef CONFIG_DETECT_HUNG_TASK static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); #endif #ifdef CONFIG_INOTIFY_USER #include <linux/inotify.h> #endif #ifdef CONFIG_SPARC #endif #ifdef __hppa__ extern int pwrsw_enabled; #endif #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW extern int unaligned_enabled; #endif #ifdef CONFIG_IA64 extern int unaligned_dump_stack; #endif #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN extern int no_unaligned_warning; #endif #ifdef CONFIG_PROC_SYSCTL /** * enum sysctl_writes_mode - supported sysctl write modes * * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value * to be written, and multiple writes on the same sysctl file descriptor * will rewrite the sysctl value, regardless of file position. No warning * is issued when the initial position is not 0. * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is * not 0. * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at * file position 0 and the value must be fully contained in the buffer * sent to the write syscall. If dealing with strings respect the file * position, but restrict this to the max length of the buffer, anything * passed the max lenght will be ignored. Multiple writes will append * to the buffer. * * These write modes control how current file position affects the behavior of * updating sysctl values through the proc interface on each write. */ enum sysctl_writes_mode { SYSCTL_WRITES_LEGACY = -1, SYSCTL_WRITES_WARN = 0, SYSCTL_WRITES_STRICT = 1, }; static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT; static int proc_do_cad_pid(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); static int proc_taint(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); #endif #ifdef CONFIG_PRINTK static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); #endif static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); #ifdef CONFIG_COREDUMP static int proc_dostring_coredump(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); #endif static int proc_dopipe_max_size(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); #ifdef CONFIG_MAGIC_SYSRQ /* Note: sysrq code uses its own private copy */ static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; static int sysrq_sysctl_handler(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { int error; error = proc_dointvec(table, write, buffer, lenp, ppos); if (error) return error; if (write) sysrq_toggle_support(__sysrq_enabled); return 0; } #endif static struct ctl_table kern_table[]; static struct ctl_table vm_table[]; static struct ctl_table fs_table[]; static struct ctl_table debug_table[]; static struct ctl_table dev_table[]; extern struct ctl_table random_table[]; #ifdef CONFIG_EPOLL extern struct ctl_table epoll_table[]; #endif #ifdef CONFIG_FW_LOADER_USER_HELPER extern struct ctl_table firmware_config_table[]; #endif #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT int sysctl_legacy_va_layout; #endif /* The default sysctl tables: */ static struct ctl_table sysctl_base_table[] = { { .procname = "kernel", .mode = 0555, .child = kern_table, }, { .procname = "vm", .mode = 0555, .child = vm_table, }, { .procname = "fs", .mode = 0555, .child = fs_table, }, { .procname = "debug", .mode = 0555, .child = debug_table, }, { .procname = "dev", .mode = 0555, .child = dev_table, }, { } }; #ifdef CONFIG_SCHED_DEBUG static int min_sched_granularity_ns = 100000; /* 100 usecs */ static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ static int min_wakeup_granularity_ns; /* 0 usecs */ static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ #ifdef CONFIG_SMP static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; #endif /* CONFIG_SMP */ #endif /* CONFIG_SCHED_DEBUG */ #ifdef CONFIG_COMPACTION static int min_extfrag_threshold; static int max_extfrag_threshold = 1000; #endif static struct ctl_table kern_table[] = { { .procname = "sched_child_runs_first", .data = &sysctl_sched_child_runs_first, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, #ifdef CONFIG_SCHED_DEBUG { .procname = "sched_min_granularity_ns", .data = &sysctl_sched_min_granularity, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = sched_proc_update_handler, .extra1 = &min_sched_granularity_ns, .extra2 = &max_sched_granularity_ns, }, { .procname = "sched_latency_ns", .data = &sysctl_sched_latency, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = sched_proc_update_handler, .extra1 = &min_sched_granularity_ns, .extra2 = &max_sched_granularity_ns, }, { .procname = "sched_wakeup_granularity_ns", .data = &sysctl_sched_wakeup_granularity, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = sched_proc_update_handler, .extra1 = &min_wakeup_granularity_ns, .extra2 = &max_wakeup_granularity_ns, }, #ifdef CONFIG_SMP { .procname = "sched_tunable_scaling", .data = &sysctl_sched_tunable_scaling, .maxlen = sizeof(enum sched_tunable_scaling), .mode = 0644, .proc_handler = sched_proc_update_handler, .extra1 = &min_sched_tunable_scaling, .extra2 = &max_sched_tunable_scaling, }, { .procname = "sched_migration_cost_ns", .data = &sysctl_sched_migration_cost, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "sched_nr_migrate", .data = &sysctl_sched_nr_migrate, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, #ifdef CONFIG_SCHEDSTATS { .procname = "sched_schedstats", .data = NULL, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = sysctl_schedstats, .extra1 = &zero, .extra2 = &one, }, #endif /* CONFIG_SCHEDSTATS */ #endif /* CONFIG_SMP */ #ifdef CONFIG_NUMA_BALANCING { .procname = "numa_balancing_scan_delay_ms", .data = &sysctl_numa_balancing_scan_delay, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "numa_balancing_scan_period_min_ms", .data = &sysctl_numa_balancing_scan_period_min, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "numa_balancing_scan_period_max_ms", .data = &sysctl_numa_balancing_scan_period_max, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "numa_balancing_scan_size_mb", .data = &sysctl_numa_balancing_scan_size, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &one, }, { .procname = "numa_balancing", .data = NULL, /* filled in by handler */ .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = sysctl_numa_balancing, .extra1 = &zero, .extra2 = &one, }, #endif /* CONFIG_NUMA_BALANCING */ #endif /* CONFIG_SCHED_DEBUG */ { .procname = "sched_rt_period_us", .data = &sysctl_sched_rt_period, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = sched_rt_handler, }, { .procname = "sched_rt_runtime_us", .data = &sysctl_sched_rt_runtime, .maxlen = sizeof(int), .mode = 0644, .proc_handler = sched_rt_handler, }, { .procname = "sched_rr_timeslice_ms", .data = &sysctl_sched_rr_timeslice, .maxlen = sizeof(int), .mode = 0644, .proc_handler = sched_rr_handler, }, #ifdef CONFIG_SCHED_AUTOGROUP { .procname = "sched_autogroup_enabled", .data = &sysctl_sched_autogroup_enabled, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, #endif #ifdef CONFIG_CFS_BANDWIDTH { .procname = "sched_cfs_bandwidth_slice_us", .data = &sysctl_sched_cfs_bandwidth_slice, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &one, }, #endif #ifdef CONFIG_PROVE_LOCKING { .procname = "prove_locking", .data = &prove_locking, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_LOCK_STAT { .procname = "lock_stat", .data = &lock_stat, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif { .procname = "panic", .data = &panic_timeout, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #ifdef CONFIG_COREDUMP { .procname = "core_uses_pid", .data = &core_uses_pid, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "core_pattern", .data = core_pattern, .maxlen = CORENAME_MAX_SIZE, .mode = 0644, .proc_handler = proc_dostring_coredump, }, { .procname = "core_pipe_limit", .data = &core_pipe_limit, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_PROC_SYSCTL { .procname = "tainted", .maxlen = sizeof(long), .mode = 0644, .proc_handler = proc_taint, }, { .procname = "sysctl_writes_strict", .data = &sysctl_writes_strict, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &neg_one, .extra2 = &one, }, #endif #ifdef CONFIG_LATENCYTOP { .procname = "latencytop", .data = &latencytop_enabled, .maxlen = sizeof(int), .mode = 0644, .proc_handler = sysctl_latencytop, }, #endif #ifdef CONFIG_BLK_DEV_INITRD { .procname = "real-root-dev", .data = &real_root_dev, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif { .procname = "print-fatal-signals", .data = &print_fatal_signals, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #ifdef CONFIG_SPARC { .procname = "reboot-cmd", .data = reboot_command, .maxlen = 256, .mode = 0644, .proc_handler = proc_dostring, }, { .procname = "stop-a", .data = &stop_a_enabled, .maxlen = sizeof (int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "scons-poweroff", .data = &scons_pwroff, .maxlen = sizeof (int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_SPARC64 { .procname = "tsb-ratio", .data = &sysctl_tsb_ratio, .maxlen = sizeof (int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef __hppa__ { .procname = "soft-power", .data = &pwrsw_enabled, .maxlen = sizeof (int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW { .procname = "unaligned-trap", .data = &unaligned_enabled, .maxlen = sizeof (int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif { .procname = "ctrl-alt-del", .data = &C_A_D, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #ifdef CONFIG_FUNCTION_TRACER { .procname = "ftrace_enabled", .data = &ftrace_enabled, .maxlen = sizeof(int), .mode = 0644, .proc_handler = ftrace_enable_sysctl, }, #endif #ifdef CONFIG_STACK_TRACER { .procname = "stack_tracer_enabled", .data = &stack_tracer_enabled, .maxlen = sizeof(int), .mode = 0644, .proc_handler = stack_trace_sysctl, }, #endif #ifdef CONFIG_TRACING { .procname = "ftrace_dump_on_oops", .data = &ftrace_dump_on_oops, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "traceoff_on_warning", .data = &__disable_trace_on_warning, .maxlen = sizeof(__disable_trace_on_warning), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "tracepoint_printk", .data = &tracepoint_printk, .maxlen = sizeof(tracepoint_printk), .mode = 0644, .proc_handler = tracepoint_printk_sysctl, }, #endif #ifdef CONFIG_KEXEC_CORE { .procname = "kexec_load_disabled", .data = &kexec_load_disabled, .maxlen = sizeof(int), .mode = 0644, /* only handle a transition from default "0" to "1" */ .proc_handler = proc_dointvec_minmax, .extra1 = &one, .extra2 = &one, }, #endif #ifdef CONFIG_MODULES { .procname = "modprobe", .data = &modprobe_path, .maxlen = KMOD_PATH_LEN, .mode = 0644, .proc_handler = proc_dostring, }, { .procname = "modules_disabled", .data = &modules_disabled, .maxlen = sizeof(int), .mode = 0644, /* only handle a transition from default "0" to "1" */ .proc_handler = proc_dointvec_minmax, .extra1 = &one, .extra2 = &one, }, #endif #ifdef CONFIG_UEVENT_HELPER { .procname = "hotplug", .data = &uevent_helper, .maxlen = UEVENT_HELPER_PATH_LEN, .mode = 0644, .proc_handler = proc_dostring, }, #endif #ifdef CONFIG_CHR_DEV_SG { .procname = "sg-big-buff", .data = &sg_big_buff, .maxlen = sizeof (int), .mode = 0444, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_BSD_PROCESS_ACCT { .procname = "acct", .data = &acct_parm, .maxlen = 3*sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_MAGIC_SYSRQ { .procname = "sysrq", .data = &__sysrq_enabled, .maxlen = sizeof (int), .mode = 0644, .proc_handler = sysrq_sysctl_handler, }, #endif #ifdef CONFIG_PROC_SYSCTL { .procname = "cad_pid", .data = NULL, .maxlen = sizeof (int), .mode = 0600, .proc_handler = proc_do_cad_pid, }, #endif { .procname = "threads-max", .data = NULL, .maxlen = sizeof(int), .mode = 0644, .proc_handler = sysctl_max_threads, }, { .procname = "random", .mode = 0555, .child = random_table, }, { .procname = "usermodehelper", .mode = 0555, .child = usermodehelper_table, }, #ifdef CONFIG_FW_LOADER_USER_HELPER { .procname = "firmware_config", .mode = 0555, .child = firmware_config_table, }, #endif { .procname = "overflowuid", .data = &overflowuid, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &minolduid, .extra2 = &maxolduid, }, { .procname = "overflowgid", .data = &overflowgid, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &minolduid, .extra2 = &maxolduid, }, #ifdef CONFIG_S390 #ifdef CONFIG_MATHEMU { .procname = "ieee_emulation_warnings", .data = &sysctl_ieee_emulation_warnings, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif { .procname = "userprocess_debug", .data = &show_unhandled_signals, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif { .procname = "pid_max", .data = &pid_max, .maxlen = sizeof (int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &pid_max_min, .extra2 = &pid_max_max, }, { .procname = "panic_on_oops", .data = &panic_on_oops, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #if defined CONFIG_PRINTK { .procname = "printk", .data = &console_loglevel, .maxlen = 4*sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "printk_ratelimit", .data = &printk_ratelimit_state.interval, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, { .procname = "printk_ratelimit_burst", .data = &printk_ratelimit_state.burst, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "printk_delay", .data = &printk_delay_msec, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &ten_thousand, }, { .procname = "printk_devkmsg", .data = devkmsg_log_str, .maxlen = DEVKMSG_STR_MAX_SIZE, .mode = 0644, .proc_handler = devkmsg_sysctl_set_loglvl, }, { .procname = "dmesg_restrict", .data = &dmesg_restrict, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax_sysadmin, .extra1 = &zero, .extra2 = &one, }, { .procname = "kptr_restrict", .data = &kptr_restrict, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax_sysadmin, .extra1 = &zero, .extra2 = &two, }, #endif { .procname = "ngroups_max", .data = &ngroups_max, .maxlen = sizeof (int), .mode = 0444, .proc_handler = proc_dointvec, }, { .procname = "cap_last_cap", .data = (void *)&cap_last_cap, .maxlen = sizeof(int), .mode = 0444, .proc_handler = proc_dointvec, }, #if defined(CONFIG_LOCKUP_DETECTOR) { .procname = "watchdog", .data = &watchdog_user_enabled, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_watchdog, .extra1 = &zero, .extra2 = &one, }, { .procname = "watchdog_thresh", .data = &watchdog_thresh, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_watchdog_thresh, .extra1 = &zero, .extra2 = &sixty, }, { .procname = "nmi_watchdog", .data = &nmi_watchdog_user_enabled, .maxlen = sizeof(int), .mode = NMI_WATCHDOG_SYSCTL_PERM, .proc_handler = proc_nmi_watchdog, .extra1 = &zero, .extra2 = &one, }, { .procname = "watchdog_cpumask", .data = &watchdog_cpumask_bits, .maxlen = NR_CPUS, .mode = 0644, .proc_handler = proc_watchdog_cpumask, }, #ifdef CONFIG_SOFTLOCKUP_DETECTOR { .procname = "soft_watchdog", .data = &soft_watchdog_user_enabled, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_soft_watchdog, .extra1 = &zero, .extra2 = &one, }, { .procname = "softlockup_panic", .data = &softlockup_panic, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, #ifdef CONFIG_SMP { .procname = "softlockup_all_cpu_backtrace", .data = &sysctl_softlockup_all_cpu_backtrace, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, #endif /* CONFIG_SMP */ #endif #ifdef CONFIG_HARDLOCKUP_DETECTOR { .procname = "hardlockup_panic", .data = &hardlockup_panic, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, #ifdef CONFIG_SMP { .procname = "hardlockup_all_cpu_backtrace", .data = &sysctl_hardlockup_all_cpu_backtrace, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, #endif /* CONFIG_SMP */ #endif #endif #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) { .procname = "unknown_nmi_panic", .data = &unknown_nmi_panic, .maxlen = sizeof (int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #if defined(CONFIG_X86) { .procname = "panic_on_unrecovered_nmi", .data = &panic_on_unrecovered_nmi, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "panic_on_io_nmi", .data = &panic_on_io_nmi, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #ifdef CONFIG_DEBUG_STACKOVERFLOW { .procname = "panic_on_stackoverflow", .data = &sysctl_panic_on_stackoverflow, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif { .procname = "bootloader_type", .data = &bootloader_type, .maxlen = sizeof (int), .mode = 0444, .proc_handler = proc_dointvec, }, { .procname = "bootloader_version", .data = &bootloader_version, .maxlen = sizeof (int), .mode = 0444, .proc_handler = proc_dointvec, }, { .procname = "io_delay_type", .data = &io_delay_type, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #if defined(CONFIG_MMU) { .procname = "randomize_va_space", .data = &randomize_va_space, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #if defined(CONFIG_S390) && defined(CONFIG_SMP) { .procname = "spin_retry", .data = &spin_retry, .maxlen = sizeof (int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) { .procname = "acpi_video_flags", .data = &acpi_realmode_flags, .maxlen = sizeof (unsigned long), .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, #endif #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN { .procname = "ignore-unaligned-usertrap", .data = &no_unaligned_warning, .maxlen = sizeof (int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_IA64 { .procname = "unaligned-dump-stack", .data = &unaligned_dump_stack, .maxlen = sizeof (int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_DETECT_HUNG_TASK { .procname = "hung_task_panic", .data = &sysctl_hung_task_panic, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, { .procname = "hung_task_check_count", .data = &sysctl_hung_task_check_count, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, }, { .procname = "hung_task_timeout_secs", .data = &sysctl_hung_task_timeout_secs, .maxlen = sizeof(unsigned long), .mode = 0644, .proc_handler = proc_dohung_task_timeout_secs, .extra2 = &hung_task_timeout_max, }, { .procname = "hung_task_check_interval_secs", .data = &sysctl_hung_task_check_interval_secs, .maxlen = sizeof(unsigned long), .mode = 0644, .proc_handler = proc_dohung_task_timeout_secs, .extra2 = &hung_task_timeout_max, }, { .procname = "hung_task_warnings", .data = &sysctl_hung_task_warnings, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &neg_one, }, #endif #ifdef CONFIG_RT_MUTEXES { .procname = "max_lock_depth", .data = &max_lock_depth, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif { .procname = "poweroff_cmd", .data = &poweroff_cmd, .maxlen = POWEROFF_CMD_PATH_LEN, .mode = 0644, .proc_handler = proc_dostring, }, #ifdef CONFIG_KEYS { .procname = "keys", .mode = 0555, .child = key_sysctls, }, #endif #ifdef CONFIG_PERF_EVENTS /* * User-space scripts rely on the existence of this file * as a feature check for perf_events being enabled. * * So it's an ABI, do not remove! */ { .procname = "perf_event_paranoid", .data = &sysctl_perf_event_paranoid, .maxlen = sizeof(sysctl_perf_event_paranoid), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "perf_event_mlock_kb", .data = &sysctl_perf_event_mlock, .maxlen = sizeof(sysctl_perf_event_mlock), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "perf_event_max_sample_rate", .data = &sysctl_perf_event_sample_rate, .maxlen = sizeof(sysctl_perf_event_sample_rate), .mode = 0644, .proc_handler = perf_proc_update_handler, .extra1 = &one, }, { .procname = "perf_cpu_time_max_percent", .data = &sysctl_perf_cpu_time_max_percent, .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), .mode = 0644, .proc_handler = perf_cpu_time_max_percent_handler, .extra1 = &zero, .extra2 = &one_hundred, }, { .procname = "perf_event_max_stack", .data = &sysctl_perf_event_max_stack, .maxlen = sizeof(sysctl_perf_event_max_stack), .mode = 0644, .proc_handler = perf_event_max_stack_handler, .extra1 = &zero, .extra2 = &six_hundred_forty_kb, }, { .procname = "perf_event_max_contexts_per_stack", .data = &sysctl_perf_event_max_contexts_per_stack, .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), .mode = 0644, .proc_handler = perf_event_max_stack_handler, .extra1 = &zero, .extra2 = &one_thousand, }, #endif { .procname = "panic_on_warn", .data = &panic_on_warn, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) { .procname = "timer_migration", .data = &sysctl_timer_migration, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = timer_migration_handler, .extra1 = &zero, .extra2 = &one, }, #endif #ifdef CONFIG_BPF_SYSCALL { .procname = "unprivileged_bpf_disabled", .data = &sysctl_unprivileged_bpf_disabled, .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), .mode = 0644, /* only handle a transition from default "0" to "1" */ .proc_handler = proc_dointvec_minmax, .extra1 = &one, .extra2 = &one, }, #endif #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) { .procname = "panic_on_rcu_stall", .data = &sysctl_panic_on_rcu_stall, .maxlen = sizeof(sysctl_panic_on_rcu_stall), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, #endif #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE { .procname = "stack_erasing", .data = NULL, .maxlen = sizeof(int), .mode = 0600, .proc_handler = stack_erasing_sysctl, .extra1 = &zero, .extra2 = &one, }, #endif { } }; static struct ctl_table vm_table[] = { { .procname = "overcommit_memory", .data = &sysctl_overcommit_memory, .maxlen = sizeof(sysctl_overcommit_memory), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &two, }, { .procname = "panic_on_oom", .data = &sysctl_panic_on_oom, .maxlen = sizeof(sysctl_panic_on_oom), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &two, }, { .procname = "oom_kill_allocating_task", .data = &sysctl_oom_kill_allocating_task, .maxlen = sizeof(sysctl_oom_kill_allocating_task), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "oom_dump_tasks", .data = &sysctl_oom_dump_tasks, .maxlen = sizeof(sysctl_oom_dump_tasks), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "overcommit_ratio", .data = &sysctl_overcommit_ratio, .maxlen = sizeof(sysctl_overcommit_ratio), .mode = 0644, .proc_handler = overcommit_ratio_handler, }, { .procname = "overcommit_kbytes", .data = &sysctl_overcommit_kbytes, .maxlen = sizeof(sysctl_overcommit_kbytes), .mode = 0644, .proc_handler = overcommit_kbytes_handler, }, { .procname = "page-cluster", .data = &page_cluster, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, }, { .procname = "dirty_background_ratio", .data = &dirty_background_ratio, .maxlen = sizeof(dirty_background_ratio), .mode = 0644, .proc_handler = dirty_background_ratio_handler, .extra1 = &zero, .extra2 = &one_hundred, }, { .procname = "dirty_background_bytes", .data = &dirty_background_bytes, .maxlen = sizeof(dirty_background_bytes), .mode = 0644, .proc_handler = dirty_background_bytes_handler, .extra1 = &one_ul, }, { .procname = "dirty_ratio", .data = &vm_dirty_ratio, .maxlen = sizeof(vm_dirty_ratio), .mode = 0644, .proc_handler = dirty_ratio_handler, .extra1 = &zero, .extra2 = &one_hundred, }, { .procname = "dirty_bytes", .data = &vm_dirty_bytes, .maxlen = sizeof(vm_dirty_bytes), .mode = 0644, .proc_handler = dirty_bytes_handler, .extra1 = &dirty_bytes_min, }, { .procname = "dirty_writeback_centisecs", .data = &dirty_writeback_interval, .maxlen = sizeof(dirty_writeback_interval), .mode = 0644, .proc_handler = dirty_writeback_centisecs_handler, }, { .procname = "dirty_expire_centisecs", .data = &dirty_expire_interval, .maxlen = sizeof(dirty_expire_interval), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, }, { .procname = "dirtytime_expire_seconds", .data = &dirtytime_expire_interval, .maxlen = sizeof(dirtytime_expire_interval), .mode = 0644, .proc_handler = dirtytime_interval_handler, .extra1 = &zero, }, { .procname = "swappiness", .data = &vm_swappiness, .maxlen = sizeof(vm_swappiness), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one_hundred, }, #ifdef CONFIG_HUGETLB_PAGE { .procname = "nr_hugepages", .data = NULL, .maxlen = sizeof(unsigned long), .mode = 0644, .proc_handler = hugetlb_sysctl_handler, }, #ifdef CONFIG_NUMA { .procname = "nr_hugepages_mempolicy", .data = NULL, .maxlen = sizeof(unsigned long), .mode = 0644, .proc_handler = &hugetlb_mempolicy_sysctl_handler, }, { .procname = "numa_stat", .data = &sysctl_vm_numa_stat, .maxlen = sizeof(int), .mode = 0644, .proc_handler = sysctl_vm_numa_stat_handler, .extra1 = &zero, .extra2 = &one, }, #endif { .procname = "hugetlb_shm_group", .data = &sysctl_hugetlb_shm_group, .maxlen = sizeof(gid_t), .mode = 0644, .proc_handler = proc_dointvec, }, { .procname = "nr_overcommit_hugepages", .data = NULL, .maxlen = sizeof(unsigned long), .mode = 0644, .proc_handler = hugetlb_overcommit_handler, }, #endif { .procname = "lowmem_reserve_ratio", .data = &sysctl_lowmem_reserve_ratio, .maxlen = sizeof(sysctl_lowmem_reserve_ratio), .mode = 0644, .proc_handler = lowmem_reserve_ratio_sysctl_handler, }, { .procname = "drop_caches", .data = &sysctl_drop_caches, .maxlen = sizeof(int), .mode = 0644, .proc_handler = drop_caches_sysctl_handler, .extra1 = &one, .extra2 = &four, }, #ifdef CONFIG_COMPACTION { .procname = "compact_memory", .data = &sysctl_compact_memory, .maxlen = sizeof(int), .mode = 0200, .proc_handler = sysctl_compaction_handler, }, { .procname = "extfrag_threshold", .data = &sysctl_extfrag_threshold, .maxlen = sizeof(int), .mode = 0644, .proc_handler = sysctl_extfrag_handler, .extra1 = &min_extfrag_threshold, .extra2 = &max_extfrag_threshold, }, { .procname = "compact_unevictable_allowed", .data = &sysctl_compact_unevictable_allowed, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, .extra1 = &zero, .extra2 = &one, }, #endif /* CONFIG_COMPACTION */ { .procname = "min_free_kbytes", .data = &min_free_kbytes, .maxlen = sizeof(min_free_kbytes), .mode = 0644, .proc_handler = min_free_kbytes_sysctl_handler, .extra1 = &zero, }, { .procname = "watermark_scale_factor", .data = &watermark_scale_factor, .maxlen = sizeof(watermark_scale_factor), .mode = 0644, .proc_handler = watermark_scale_factor_sysctl_handler, .extra1 = &one, .extra2 = &one_thousand, }, { .procname = "percpu_pagelist_fraction", .data = &percpu_pagelist_fraction, .maxlen = sizeof(percpu_pagelist_fraction), .mode = 0644, .proc_handler = percpu_pagelist_fraction_sysctl_handler, .extra1 = &zero, }, #ifdef CONFIG_MMU { .procname = "max_map_count", .data = &sysctl_max_map_count, .maxlen = sizeof(sysctl_max_map_count), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, }, #else { .procname = "nr_trim_pages", .data = &sysctl_nr_trim_pages, .maxlen = sizeof(sysctl_nr_trim_pages), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, }, #endif { .procname = "laptop_mode", .data = &laptop_mode, .maxlen = sizeof(laptop_mode), .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, { .procname = "block_dump", .data = &block_dump, .maxlen = sizeof(block_dump), .mode = 0644, .proc_handler = proc_dointvec, .extra1 = &zero, }, { .procname = "vfs_cache_pressure", .data = &sysctl_vfs_cache_pressure, .maxlen = sizeof(sysctl_vfs_cache_pressure), .mode = 0644, .proc_handler = proc_dointvec, .extra1 = &zero, }, #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT { .procname = "legacy_va_layout", .data = &sysctl_legacy_va_layout, .maxlen = sizeof(sysctl_legacy_va_layout), .mode = 0644, .proc_handler = proc_dointvec, .extra1 = &zero, }, #endif #ifdef CONFIG_NUMA { .procname = "zone_reclaim_mode", .data = &node_reclaim_mode, .maxlen = sizeof(node_reclaim_mode), .mode = 0644, .proc_handler = proc_dointvec, .extra1 = &zero, }, { .procname = "min_unmapped_ratio", .data = &sysctl_min_unmapped_ratio, .maxlen = sizeof(sysctl_min_unmapped_ratio), .mode = 0644, .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, .extra1 = &zero, .extra2 = &one_hundred, }, { .procname = "min_slab_ratio", .data = &sysctl_min_slab_ratio, .maxlen = sizeof(sysctl_min_slab_ratio), .mode = 0644, .proc_handler = sysctl_min_slab_ratio_sysctl_handler, .extra1 = &zero, .extra2 = &one_hundred, }, #endif #ifdef CONFIG_SMP { .procname = "stat_interval", .data = &sysctl_stat_interval, .maxlen = sizeof(sysctl_stat_interval), .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, { .procname = "stat_refresh", .data = NULL, .maxlen = 0, .mode = 0600, .proc_handler = vmstat_refresh, }, #endif #ifdef CONFIG_MMU { .procname = "mmap_min_addr", .data = &dac_mmap_min_addr, .maxlen = sizeof(unsigned long), .mode = 0644, .proc_handler = mmap_min_addr_handler, }, #endif #ifdef CONFIG_NUMA { .procname = "numa_zonelist_order", .data = &numa_zonelist_order, .maxlen = NUMA_ZONELIST_ORDER_LEN, .mode = 0644, .proc_handler = numa_zonelist_order_handler, }, #endif #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) { .procname = "vdso_enabled", #ifdef CONFIG_X86_32 .data = &vdso32_enabled, .maxlen = sizeof(vdso32_enabled), #else .data = &vdso_enabled, .maxlen = sizeof(vdso_enabled), #endif .mode = 0644, .proc_handler = proc_dointvec, .extra1 = &zero, }, #endif #ifdef CONFIG_HIGHMEM { .procname = "highmem_is_dirtyable", .data = &vm_highmem_is_dirtyable, .maxlen = sizeof(vm_highmem_is_dirtyable), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, #endif #ifdef CONFIG_MEMORY_FAILURE { .procname = "memory_failure_early_kill", .data = &sysctl_memory_failure_early_kill, .maxlen = sizeof(sysctl_memory_failure_early_kill), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, { .procname = "memory_failure_recovery", .data = &sysctl_memory_failure_recovery, .maxlen = sizeof(sysctl_memory_failure_recovery), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, #endif { .procname = "user_reserve_kbytes", .data = &sysctl_user_reserve_kbytes, .maxlen = sizeof(sysctl_user_reserve_kbytes), .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, { .procname = "admin_reserve_kbytes", .data = &sysctl_admin_reserve_kbytes, .maxlen = sizeof(sysctl_admin_reserve_kbytes), .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS { .procname = "mmap_rnd_bits", .data = &mmap_rnd_bits, .maxlen = sizeof(mmap_rnd_bits), .mode = 0600, .proc_handler = proc_dointvec_minmax, .extra1 = (void *)&mmap_rnd_bits_min, .extra2 = (void *)&mmap_rnd_bits_max, }, #endif #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS { .procname = "mmap_rnd_compat_bits", .data = &mmap_rnd_compat_bits, .maxlen = sizeof(mmap_rnd_compat_bits), .mode = 0600, .proc_handler = proc_dointvec_minmax, .extra1 = (void *)&mmap_rnd_compat_bits_min, .extra2 = (void *)&mmap_rnd_compat_bits_max, }, #endif { } }; static struct ctl_table fs_table[] = { { .procname = "inode-nr", .data = &inodes_stat, .maxlen = 2*sizeof(long), .mode = 0444, .proc_handler = proc_nr_inodes, }, { .procname = "inode-state", .data = &inodes_stat, .maxlen = 7*sizeof(long), .mode = 0444, .proc_handler = proc_nr_inodes, }, { .procname = "file-nr", .data = &files_stat, .maxlen = sizeof(files_stat), .mode = 0444, .proc_handler = proc_nr_files, }, { .procname = "file-max", .data = &files_stat.max_files, .maxlen = sizeof(files_stat.max_files), .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, { .procname = "nr_open", .data = &sysctl_nr_open, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &sysctl_nr_open_min, .extra2 = &sysctl_nr_open_max, }, { .procname = "dentry-state", .data = &dentry_stat, .maxlen = 6*sizeof(long), .mode = 0444, .proc_handler = proc_nr_dentry, }, { .procname = "overflowuid", .data = &fs_overflowuid, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &minolduid, .extra2 = &maxolduid, }, { .procname = "overflowgid", .data = &fs_overflowgid, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &minolduid, .extra2 = &maxolduid, }, #ifdef CONFIG_FILE_LOCKING { .procname = "leases-enable", .data = &leases_enable, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_DNOTIFY { .procname = "dir-notify-enable", .data = &dir_notify_enable, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_MMU #ifdef CONFIG_FILE_LOCKING { .procname = "lease-break-time", .data = &lease_break_time, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif #ifdef CONFIG_AIO { .procname = "aio-nr", .data = &aio_nr, .maxlen = sizeof(aio_nr), .mode = 0444, .proc_handler = proc_doulongvec_minmax, }, { .procname = "aio-max-nr", .data = &aio_max_nr, .maxlen = sizeof(aio_max_nr), .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, #endif /* CONFIG_AIO */ #ifdef CONFIG_INOTIFY_USER { .procname = "inotify", .mode = 0555, .child = inotify_table, }, #endif #ifdef CONFIG_EPOLL { .procname = "epoll", .mode = 0555, .child = epoll_table, }, #endif #endif { .procname = "protected_symlinks", .data = &sysctl_protected_symlinks, .maxlen = sizeof(int), .mode = 0600, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, { .procname = "protected_hardlinks", .data = &sysctl_protected_hardlinks, .maxlen = sizeof(int), .mode = 0600, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, { .procname = "protected_fifos", .data = &sysctl_protected_fifos, .maxlen = sizeof(int), .mode = 0600, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &two, }, { .procname = "protected_regular", .data = &sysctl_protected_regular, .maxlen = sizeof(int), .mode = 0600, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &two, }, { .procname = "suid_dumpable", .data = &suid_dumpable, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax_coredump, .extra1 = &zero, .extra2 = &two, }, #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) { .procname = "binfmt_misc", .mode = 0555, .child = sysctl_mount_point, }, #endif { .procname = "pipe-max-size", .data = &pipe_max_size, .maxlen = sizeof(pipe_max_size), .mode = 0644, .proc_handler = proc_dopipe_max_size, }, { .procname = "pipe-user-pages-hard", .data = &pipe_user_pages_hard, .maxlen = sizeof(pipe_user_pages_hard), .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, { .procname = "pipe-user-pages-soft", .data = &pipe_user_pages_soft, .maxlen = sizeof(pipe_user_pages_soft), .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, { .procname = "mount-max", .data = &sysctl_mount_max, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &one, }, { } }; static struct ctl_table debug_table[] = { #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE { .procname = "exception-trace", .data = &show_unhandled_signals, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec }, #endif #if defined(CONFIG_OPTPROBES) { .procname = "kprobes-optimization", .data = &sysctl_kprobes_optimization, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_kprobes_optimization_handler, .extra1 = &zero, .extra2 = &one, }, #endif { } }; static struct ctl_table dev_table[] = { { } }; int __init sysctl_init(void) { struct ctl_table_header *hdr; hdr = register_sysctl_table(sysctl_base_table); kmemleak_not_leak(hdr); return 0; } #endif /* CONFIG_SYSCTL */ /* * /proc/sys support */ #ifdef CONFIG_PROC_SYSCTL static int _proc_do_string(char *data, int maxlen, int write, char __user *buffer, size_t *lenp, loff_t *ppos) { size_t len; char __user *p; char c; if (!data || !maxlen || !*lenp) { *lenp = 0; return 0; } if (write) { if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { /* Only continue writes not past the end of buffer. */ len = strlen(data); if (len > maxlen - 1) len = maxlen - 1; if (*ppos > len) return 0; len = *ppos; } else { /* Start writing from beginning of buffer. */ len = 0; } *ppos += *lenp; p = buffer; while ((p - buffer) < *lenp && len < maxlen - 1) { if (get_user(c, p++)) return -EFAULT; if (c == 0 || c == '\n') break; data[len++] = c; } data[len] = 0; } else { len = strlen(data); if (len > maxlen) len = maxlen; if (*ppos > len) { *lenp = 0; return 0; } data += *ppos; len -= *ppos; if (len > *lenp) len = *lenp; if (len) if (copy_to_user(buffer, data, len)) return -EFAULT; if (len < *lenp) { if (put_user('\n', buffer + len)) return -EFAULT; len++; } *lenp = len; *ppos += len; } return 0; } static void warn_sysctl_write(struct ctl_table *table) { pr_warn_once("%s wrote to %s when file position was not 0!\n" "This will not be supported in the future. To silence this\n" "warning, set kernel.sysctl_writes_strict = -1\n", current->comm, table->procname); } /** * proc_first_pos_non_zero_ignore - check if first position is allowed * @ppos: file position * @table: the sysctl table * * Returns true if the first position is non-zero and the sysctl_writes_strict * mode indicates this is not allowed for numeric input types. String proc * handlers can ignore the return value. */ static bool proc_first_pos_non_zero_ignore(loff_t *ppos, struct ctl_table *table) { if (!*ppos) return false; switch (sysctl_writes_strict) { case SYSCTL_WRITES_STRICT: return true; case SYSCTL_WRITES_WARN: warn_sysctl_write(table); return false; default: return false; } } /** * proc_dostring - read a string sysctl * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: file position * * Reads/writes a string from/to the user buffer. If the kernel * buffer provided is not large enough to hold the string, the * string is truncated. The copied string is %NULL-terminated. * If the string is being read by the user process, it is copied * and a newline '\n' is added. It is truncated if the buffer is * not large enough. * * Returns 0 on success. */ int proc_dostring(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { if (write) proc_first_pos_non_zero_ignore(ppos, table); return _proc_do_string((char *)(table->data), table->maxlen, write, (char __user *)buffer, lenp, ppos); } static size_t proc_skip_spaces(char **buf) { size_t ret; char *tmp = skip_spaces(*buf); ret = tmp - *buf; *buf = tmp; return ret; } static void proc_skip_char(char **buf, size_t *size, const char v) { while (*size) { if (**buf != v) break; (*size)--; (*buf)++; } } #define TMPBUFLEN 22 /** * proc_get_long - reads an ASCII formatted integer from a user buffer * * @buf: a kernel buffer * @size: size of the kernel buffer * @val: this is where the number will be stored * @neg: set to %TRUE if number is negative * @perm_tr: a vector which contains the allowed trailers * @perm_tr_len: size of the perm_tr vector * @tr: pointer to store the trailer character * * In case of success %0 is returned and @buf and @size are updated with * the amount of bytes read. If @tr is non-NULL and a trailing * character exists (size is non-zero after returning from this * function), @tr is updated with the trailing character. */ static int proc_get_long(char **buf, size_t *size, unsigned long *val, bool *neg, const char *perm_tr, unsigned perm_tr_len, char *tr) { int len; char *p, tmp[TMPBUFLEN]; if (!*size) return -EINVAL; len = *size; if (len > TMPBUFLEN - 1) len = TMPBUFLEN - 1; memcpy(tmp, *buf, len); tmp[len] = 0; p = tmp; if (*p == '-' && *size > 1) { *neg = true; p++; } else *neg = false; if (!isdigit(*p)) return -EINVAL; *val = simple_strtoul(p, &p, 0); len = p - tmp; /* We don't know if the next char is whitespace thus we may accept * invalid integers (e.g. 1234...a) or two integers instead of one * (e.g. 123...1). So lets not allow such large numbers. */ if (len == TMPBUFLEN - 1) return -EINVAL; if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) return -EINVAL; if (tr && (len < *size)) *tr = *p; *buf += len; *size -= len; return 0; } /** * proc_put_long - converts an integer to a decimal ASCII formatted string * * @buf: the user buffer * @size: the size of the user buffer * @val: the integer to be converted * @neg: sign of the number, %TRUE for negative * * In case of success %0 is returned and @buf and @size are updated with * the amount of bytes written. */ static int proc_put_long(void __user **buf, size_t *size, unsigned long val, bool neg) { int len; char tmp[TMPBUFLEN], *p = tmp; sprintf(p, "%s%lu", neg ? "-" : "", val); len = strlen(tmp); if (len > *size) len = *size; if (copy_to_user(*buf, tmp, len)) return -EFAULT; *size -= len; *buf += len; return 0; } #undef TMPBUFLEN static int proc_put_char(void __user **buf, size_t *size, char c) { if (*size) { char __user **buffer = (char __user **)buf; if (put_user(c, *buffer)) return -EFAULT; (*size)--, (*buffer)++; *buf = *buffer; } return 0; } static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, int *valp, int write, void *data) { if (write) { if (*negp) { if (*lvalp > (unsigned long) INT_MAX + 1) return -EINVAL; *valp = -*lvalp; } else { if (*lvalp > (unsigned long) INT_MAX) return -EINVAL; *valp = *lvalp; } } else { int val = *valp; if (val < 0) { *negp = true; *lvalp = -(unsigned long)val; } else { *negp = false; *lvalp = (unsigned long)val; } } return 0; } static int do_proc_douintvec_conv(unsigned long *lvalp, unsigned int *valp, int write, void *data) { if (write) { if (*lvalp > UINT_MAX) return -EINVAL; *valp = *lvalp; } else { unsigned int val = *valp; *lvalp = (unsigned long)val; } return 0; } static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos, int (*conv)(bool *negp, unsigned long *lvalp, int *valp, int write, void *data), void *data) { int *i, vleft, first = 1, err = 0; size_t left; char *kbuf = NULL, *p; if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { *lenp = 0; return 0; } i = (int *) tbl_data; vleft = table->maxlen / sizeof(*i); left = *lenp; if (!conv) conv = do_proc_dointvec_conv; if (write) { if (proc_first_pos_non_zero_ignore(ppos, table)) goto out; if (left > PAGE_SIZE - 1) left = PAGE_SIZE - 1; p = kbuf = memdup_user_nul(buffer, left); if (IS_ERR(kbuf)) return PTR_ERR(kbuf); } for (; left && vleft--; i++, first=0) { unsigned long lval; bool neg; if (write) { left -= proc_skip_spaces(&p); if (!left) break; err = proc_get_long(&p, &left, &lval, &neg, proc_wspace_sep, sizeof(proc_wspace_sep), NULL); if (err) break; if (conv(&neg, &lval, i, 1, data)) { err = -EINVAL; break; } } else { if (conv(&neg, &lval, i, 0, data)) { err = -EINVAL; break; } if (!first) err = proc_put_char(&buffer, &left, '\t'); if (err) break; err = proc_put_long(&buffer, &left, lval, neg); if (err) break; } } if (!write && !first && left && !err) err = proc_put_char(&buffer, &left, '\n'); if (write && !err && left) left -= proc_skip_spaces(&p); if (write) { kfree(kbuf); if (first) return err ? : -EINVAL; } *lenp -= left; out: *ppos += *lenp; return err; } static int do_proc_dointvec(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos, int (*conv)(bool *negp, unsigned long *lvalp, int *valp, int write, void *data), void *data) { return __do_proc_dointvec(table->data, table, write, buffer, lenp, ppos, conv, data); } static int do_proc_douintvec_w(unsigned int *tbl_data, struct ctl_table *table, void __user *buffer, size_t *lenp, loff_t *ppos, int (*conv)(unsigned long *lvalp, unsigned int *valp, int write, void *data), void *data) { unsigned long lval; int err = 0; size_t left; bool neg; char *kbuf = NULL, *p; left = *lenp; if (proc_first_pos_non_zero_ignore(ppos, table)) goto bail_early; if (left > PAGE_SIZE - 1) left = PAGE_SIZE - 1; p = kbuf = memdup_user_nul(buffer, left); if (IS_ERR(kbuf)) return -EINVAL; left -= proc_skip_spaces(&p); if (!left) { err = -EINVAL; goto out_free; } err = proc_get_long(&p, &left, &lval, &neg, proc_wspace_sep, sizeof(proc_wspace_sep), NULL); if (err || neg) { err = -EINVAL; goto out_free; } if (conv(&lval, tbl_data, 1, data)) { err = -EINVAL; goto out_free; } if (!err && left) left -= proc_skip_spaces(&p); out_free: kfree(kbuf); if (err) return -EINVAL; return 0; /* This is in keeping with old __do_proc_dointvec() */ bail_early: *ppos += *lenp; return err; } static int do_proc_douintvec_r(unsigned int *tbl_data, void __user *buffer, size_t *lenp, loff_t *ppos, int (*conv)(unsigned long *lvalp, unsigned int *valp, int write, void *data), void *data) { unsigned long lval; int err = 0; size_t left; left = *lenp; if (conv(&lval, tbl_data, 0, data)) { err = -EINVAL; goto out; } err = proc_put_long(&buffer, &left, lval, false); if (err || !left) goto out; err = proc_put_char(&buffer, &left, '\n'); out: *lenp -= left; *ppos += *lenp; return err; } static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos, int (*conv)(unsigned long *lvalp, unsigned int *valp, int write, void *data), void *data) { unsigned int *i, vleft; if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { *lenp = 0; return 0; } i = (unsigned int *) tbl_data; vleft = table->maxlen / sizeof(*i); /* * Arrays are not supported, keep this simple. *Do not* add * support for them. */ if (vleft != 1) { *lenp = 0; return -EINVAL; } if (!conv) conv = do_proc_douintvec_conv; if (write) return do_proc_douintvec_w(i, table, buffer, lenp, ppos, conv, data); return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); } static int do_proc_douintvec(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos, int (*conv)(unsigned long *lvalp, unsigned int *valp, int write, void *data), void *data) { return __do_proc_douintvec(table->data, table, write, buffer, lenp, ppos, conv, data); } /** * proc_dointvec - read a vector of integers * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: file position * * Reads/writes up to table->maxlen/sizeof(unsigned int) integer * values from/to the user buffer, treated as an ASCII string. * * Returns 0 on success. */ int proc_dointvec(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); } /** * proc_douintvec - read a vector of unsigned integers * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: file position * * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer * values from/to the user buffer, treated as an ASCII string. * * Returns 0 on success. */ int proc_douintvec(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return do_proc_douintvec(table, write, buffer, lenp, ppos, do_proc_douintvec_conv, NULL); } /* * Taint values can only be increased * This means we can safely use a temporary. */ static int proc_taint(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { struct ctl_table t; unsigned long tmptaint = get_taint(); int err; if (write && !capable(CAP_SYS_ADMIN)) return -EPERM; t = *table; t.data = &tmptaint; err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); if (err < 0) return err; if (write) { /* * Poor man's atomic or. Not worth adding a primitive * to everyone's atomic.h for this */ int i; for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { if ((tmptaint >> i) & 1) add_taint(i, LOCKDEP_STILL_OK); } } return err; } #ifdef CONFIG_PRINTK static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { if (write && !capable(CAP_SYS_ADMIN)) return -EPERM; return proc_dointvec_minmax(table, write, buffer, lenp, ppos); } #endif /** * struct do_proc_dointvec_minmax_conv_param - proc_dointvec_minmax() range checking structure * @min: pointer to minimum allowable value * @max: pointer to maximum allowable value * * The do_proc_dointvec_minmax_conv_param structure provides the * minimum and maximum values for doing range checking for those sysctl * parameters that use the proc_dointvec_minmax() handler. */ struct do_proc_dointvec_minmax_conv_param { int *min; int *max; }; static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, int *valp, int write, void *data) { struct do_proc_dointvec_minmax_conv_param *param = data; if (write) { int val = *negp ? -*lvalp : *lvalp; if ((param->min && *param->min > val) || (param->max && *param->max < val)) return -EINVAL; *valp = val; } else { int val = *valp; if (val < 0) { *negp = true; *lvalp = -(unsigned long)val; } else { *negp = false; *lvalp = (unsigned long)val; } } return 0; } /** * proc_dointvec_minmax - read a vector of integers with min/max values * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: file position * * Reads/writes up to table->maxlen/sizeof(unsigned int) integer * values from/to the user buffer, treated as an ASCII string. * * This routine will ensure the values are within the range specified by * table->extra1 (min) and table->extra2 (max). * * Returns 0 on success or -EINVAL on write when the range check fails. */ int proc_dointvec_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { struct do_proc_dointvec_minmax_conv_param param = { .min = (int *) table->extra1, .max = (int *) table->extra2, }; return do_proc_dointvec(table, write, buffer, lenp, ppos, do_proc_dointvec_minmax_conv, ¶m); } /** * struct do_proc_douintvec_minmax_conv_param - proc_douintvec_minmax() range checking structure * @min: pointer to minimum allowable value * @max: pointer to maximum allowable value * * The do_proc_douintvec_minmax_conv_param structure provides the * minimum and maximum values for doing range checking for those sysctl * parameters that use the proc_douintvec_minmax() handler. */ struct do_proc_douintvec_minmax_conv_param { unsigned int *min; unsigned int *max; }; static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, unsigned int *valp, int write, void *data) { struct do_proc_douintvec_minmax_conv_param *param = data; if (write) { unsigned int val = *lvalp; if (*lvalp > UINT_MAX) return -EINVAL; if ((param->min && *param->min > val) || (param->max && *param->max < val)) return -ERANGE; *valp = val; } else { unsigned int val = *valp; *lvalp = (unsigned long) val; } return 0; } /** * proc_douintvec_minmax - read a vector of unsigned ints with min/max values * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: file position * * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer * values from/to the user buffer, treated as an ASCII string. Negative * strings are not allowed. * * This routine will ensure the values are within the range specified by * table->extra1 (min) and table->extra2 (max). There is a final sanity * check for UINT_MAX to avoid having to support wrap around uses from * userspace. * * Returns 0 on success or -ERANGE on write when the range check fails. */ int proc_douintvec_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { struct do_proc_douintvec_minmax_conv_param param = { .min = (unsigned int *) table->extra1, .max = (unsigned int *) table->extra2, }; return do_proc_douintvec(table, write, buffer, lenp, ppos, do_proc_douintvec_minmax_conv, ¶m); } static int do_proc_dopipe_max_size_conv(unsigned long *lvalp, unsigned int *valp, int write, void *data) { if (write) { unsigned int val; val = round_pipe_size(*lvalp); if (val == 0) return -EINVAL; *valp = val; } else { unsigned int val = *valp; *lvalp = (unsigned long) val; } return 0; } static int proc_dopipe_max_size(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return do_proc_douintvec(table, write, buffer, lenp, ppos, do_proc_dopipe_max_size_conv, NULL); } static void validate_coredump_safety(void) { #ifdef CONFIG_COREDUMP if (suid_dumpable == SUID_DUMP_ROOT && core_pattern[0] != '/' && core_pattern[0] != '|') { printk(KERN_WARNING "Unsafe core_pattern used with fs.suid_dumpable=2.\n" "Pipe handler or fully qualified core dump path required.\n" "Set kernel.core_pattern before fs.suid_dumpable.\n" ); } #endif } static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); if (!error) validate_coredump_safety(); return error; } #ifdef CONFIG_COREDUMP static int proc_dostring_coredump(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { int error = proc_dostring(table, write, buffer, lenp, ppos); if (!error) validate_coredump_safety(); return error; } #endif static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos, unsigned long convmul, unsigned long convdiv) { unsigned long *i, *min, *max; int vleft, first = 1, err = 0; size_t left; char *kbuf = NULL, *p; if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { *lenp = 0; return 0; } i = (unsigned long *) data; min = (unsigned long *) table->extra1; max = (unsigned long *) table->extra2; vleft = table->maxlen / sizeof(unsigned long); left = *lenp; if (write) { if (proc_first_pos_non_zero_ignore(ppos, table)) goto out; if (left > PAGE_SIZE - 1) left = PAGE_SIZE - 1; p = kbuf = memdup_user_nul(buffer, left); if (IS_ERR(kbuf)) return PTR_ERR(kbuf); } for (; left && vleft--; i++, first = 0) { unsigned long val; if (write) { bool neg; left -= proc_skip_spaces(&p); err = proc_get_long(&p, &left, &val, &neg, proc_wspace_sep, sizeof(proc_wspace_sep), NULL); if (err) break; if (neg) continue; val = convmul * val / convdiv; if ((min && val < *min) || (max && val > *max)) continue; *i = val; } else { val = convdiv * (*i) / convmul; if (!first) { err = proc_put_char(&buffer, &left, '\t'); if (err) break; } err = proc_put_long(&buffer, &left, val, false); if (err) break; } } if (!write && !first && left && !err) err = proc_put_char(&buffer, &left, '\n'); if (write && !err) left -= proc_skip_spaces(&p); if (write) { kfree(kbuf); if (first) return err ? : -EINVAL; } *lenp -= left; out: *ppos += *lenp; return err; } static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos, unsigned long convmul, unsigned long convdiv) { return __do_proc_doulongvec_minmax(table->data, table, write, buffer, lenp, ppos, convmul, convdiv); } /** * proc_doulongvec_minmax - read a vector of long integers with min/max values * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: file position * * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long * values from/to the user buffer, treated as an ASCII string. * * This routine will ensure the values are within the range specified by * table->extra1 (min) and table->extra2 (max). * * Returns 0 on success. */ int proc_doulongvec_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); } /** * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: file position * * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long * values from/to the user buffer, treated as an ASCII string. The values * are treated as milliseconds, and converted to jiffies when they are stored. * * This routine will ensure the values are within the range specified by * table->extra1 (min) and table->extra2 (max). * * Returns 0 on success. */ int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, HZ, 1000l); } static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, int *valp, int write, void *data) { if (write) { if (*lvalp > INT_MAX / HZ) return 1; *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); } else { int val = *valp; unsigned long lval; if (val < 0) { *negp = true; lval = -(unsigned long)val; } else { *negp = false; lval = (unsigned long)val; } *lvalp = lval / HZ; } return 0; } static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, int *valp, int write, void *data) { if (write) { if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) return 1; *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); } else { int val = *valp; unsigned long lval; if (val < 0) { *negp = true; lval = -(unsigned long)val; } else { *negp = false; lval = (unsigned long)val; } *lvalp = jiffies_to_clock_t(lval); } return 0; } static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, int *valp, int write, void *data) { if (write) { unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); if (jif > INT_MAX) return 1; *valp = (int)jif; } else { int val = *valp; unsigned long lval; if (val < 0) { *negp = true; lval = -(unsigned long)val; } else { *negp = false; lval = (unsigned long)val; } *lvalp = jiffies_to_msecs(lval); } return 0; } /** * proc_dointvec_jiffies - read a vector of integers as seconds * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: file position * * Reads/writes up to table->maxlen/sizeof(unsigned int) integer * values from/to the user buffer, treated as an ASCII string. * The values read are assumed to be in seconds, and are converted into * jiffies. * * Returns 0 on success. */ int proc_dointvec_jiffies(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return do_proc_dointvec(table,write,buffer,lenp,ppos, do_proc_dointvec_jiffies_conv,NULL); } /** * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: pointer to the file position * * Reads/writes up to table->maxlen/sizeof(unsigned int) integer * values from/to the user buffer, treated as an ASCII string. * The values read are assumed to be in 1/USER_HZ seconds, and * are converted into jiffies. * * Returns 0 on success. */ int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return do_proc_dointvec(table,write,buffer,lenp,ppos, do_proc_dointvec_userhz_jiffies_conv,NULL); } /** * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: file position * @ppos: the current position in the file * * Reads/writes up to table->maxlen/sizeof(unsigned int) integer * values from/to the user buffer, treated as an ASCII string. * The values read are assumed to be in 1/1000 seconds, and * are converted into jiffies. * * Returns 0 on success. */ int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return do_proc_dointvec(table, write, buffer, lenp, ppos, do_proc_dointvec_ms_jiffies_conv, NULL); } static int proc_do_cad_pid(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { struct pid *new_pid; pid_t tmp; int r; tmp = pid_vnr(cad_pid); r = __do_proc_dointvec(&tmp, table, write, buffer, lenp, ppos, NULL, NULL); if (r || !write) return r; new_pid = find_get_pid(tmp); if (!new_pid) return -ESRCH; put_pid(xchg(&cad_pid, new_pid)); return 0; } /** * proc_do_large_bitmap - read/write from/to a large bitmap * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file * @buffer: the user buffer * @lenp: the size of the user buffer * @ppos: file position * * The bitmap is stored at table->data and the bitmap length (in bits) * in table->maxlen. * * We use a range comma separated format (e.g. 1,3-4,10-10) so that * large bitmaps may be represented in a compact manner. Writing into * the file will clear the bitmap then update it with the given input. * * Returns 0 on success. */ int proc_do_large_bitmap(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { int err = 0; bool first = 1; size_t left = *lenp; unsigned long bitmap_len = table->maxlen; unsigned long *bitmap = *(unsigned long **) table->data; unsigned long *tmp_bitmap = NULL; char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { *lenp = 0; return 0; } if (write) { char *kbuf, *p; if (left > PAGE_SIZE - 1) left = PAGE_SIZE - 1; p = kbuf = memdup_user_nul(buffer, left); if (IS_ERR(kbuf)) return PTR_ERR(kbuf); tmp_bitmap = kcalloc(BITS_TO_LONGS(bitmap_len), sizeof(unsigned long), GFP_KERNEL); if (!tmp_bitmap) { kfree(kbuf); return -ENOMEM; } proc_skip_char(&p, &left, '\n'); while (!err && left) { unsigned long val_a, val_b; bool neg; err = proc_get_long(&p, &left, &val_a, &neg, tr_a, sizeof(tr_a), &c); if (err) break; if (val_a >= bitmap_len || neg) { err = -EINVAL; break; } val_b = val_a; if (left) { p++; left--; } if (c == '-') { err = proc_get_long(&p, &left, &val_b, &neg, tr_b, sizeof(tr_b), &c); if (err) break; if (val_b >= bitmap_len || neg || val_a > val_b) { err = -EINVAL; break; } if (left) { p++; left--; } } bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); first = 0; proc_skip_char(&p, &left, '\n'); } kfree(kbuf); } else { unsigned long bit_a, bit_b = 0; while (left) { bit_a = find_next_bit(bitmap, bitmap_len, bit_b); if (bit_a >= bitmap_len) break; bit_b = find_next_zero_bit(bitmap, bitmap_len, bit_a + 1) - 1; if (!first) { err = proc_put_char(&buffer, &left, ','); if (err) break; } err = proc_put_long(&buffer, &left, bit_a, false); if (err) break; if (bit_a != bit_b) { err = proc_put_char(&buffer, &left, '-'); if (err) break; err = proc_put_long(&buffer, &left, bit_b, false); if (err) break; } first = 0; bit_b++; } if (!err) err = proc_put_char(&buffer, &left, '\n'); } if (!err) { if (write) { if (*ppos) bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); else bitmap_copy(bitmap, tmp_bitmap, bitmap_len); } *lenp -= left; *ppos += *lenp; } kfree(tmp_bitmap); return err; } #else /* CONFIG_PROC_SYSCTL */ int proc_dostring(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } int proc_dointvec(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } int proc_douintvec(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } int proc_dointvec_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } int proc_douintvec_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } int proc_dointvec_jiffies(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } int proc_doulongvec_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } #endif /* CONFIG_PROC_SYSCTL */ /* * No sense putting this after each symbol definition, twice, * exception granted :-) */ EXPORT_SYMBOL(proc_dointvec); EXPORT_SYMBOL(proc_douintvec); EXPORT_SYMBOL(proc_dointvec_jiffies); EXPORT_SYMBOL(proc_dointvec_minmax); EXPORT_SYMBOL_GPL(proc_douintvec_minmax); EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); EXPORT_SYMBOL(proc_dointvec_ms_jiffies); EXPORT_SYMBOL(proc_dostring); EXPORT_SYMBOL(proc_doulongvec_minmax); EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
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