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kernel/sysctl.c
60.7 KB
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/* * 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 */ |
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#include <linux/module.h> #include <linux/mm.h> #include <linux/swap.h> #include <linux/slab.h> #include <linux/sysctl.h> |
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#include <linux/bitmap.h> |
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#include <linux/signal.h> |
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#include <linux/printk.h> |
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#include <linux/proc_fs.h> |
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#include <linux/security.h> |
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#include <linux/ctype.h> |
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#include <linux/kmemcheck.h> |
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#include <linux/kmemleak.h> |
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#include <linux/fs.h> |
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#include <linux/init.h> #include <linux/kernel.h> |
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#include <linux/kobject.h> |
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#include <linux/net.h> |
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#include <linux/sysrq.h> #include <linux/highuid.h> #include <linux/writeback.h> |
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#include <linux/ratelimit.h> |
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#include <linux/compaction.h> |
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#include <linux/hugetlb.h> |
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#include <linux/initrd.h> |
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#include <linux/key.h> |
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#include <linux/times.h> #include <linux/limits.h> #include <linux/dcache.h> |
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#include <linux/dnotify.h> |
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#include <linux/syscalls.h> |
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#include <linux/vmstat.h> |
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#include <linux/nfs_fs.h> #include <linux/acpi.h> |
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#include <linux/reboot.h> |
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#include <linux/ftrace.h> |
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#include <linux/perf_event.h> |
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#include <linux/kprobes.h> |
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#include <linux/pipe_fs_i.h> |
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#include <linux/oom.h> |
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#include <linux/kmod.h> |
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#include <linux/capability.h> |
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#include <linux/binfmts.h> |
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#include <linux/sched/sysctl.h> |
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#include <asm/uaccess.h> #include <asm/processor.h> |
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#ifdef CONFIG_X86 #include <asm/nmi.h> |
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#include <asm/stacktrace.h> |
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#include <asm/io.h> |
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#endif |
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#ifdef CONFIG_SPARC #include <asm/setup.h> #endif |
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#ifdef CONFIG_BSD_PROCESS_ACCT #include <linux/acct.h> #endif |
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#ifdef CONFIG_RT_MUTEXES #include <linux/rtmutex.h> #endif |
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#if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) #include <linux/lockdep.h> #endif |
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#ifdef CONFIG_CHR_DEV_SG #include <scsi/sg.h> #endif |
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#ifdef CONFIG_LOCKUP_DETECTOR |
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#include <linux/nmi.h> #endif |
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#if defined(CONFIG_SYSCTL) /* External variables not in a header file. */ |
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extern int sysctl_overcommit_memory; extern int sysctl_overcommit_ratio; extern int max_threads; |
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extern int suid_dumpable; |
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#ifdef CONFIG_COREDUMP extern int core_uses_pid; |
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extern char core_pattern[]; |
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extern unsigned int core_pipe_limit; |
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#endif |
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extern int pid_max; |
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extern int pid_max_min, pid_max_max; |
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extern int percpu_pagelist_fraction; |
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extern int compat_log; |
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extern int latencytop_enabled; |
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extern int sysctl_nr_open_min, sysctl_nr_open_max; |
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#ifndef CONFIG_MMU extern int sysctl_nr_trim_pages; #endif |
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#ifdef CONFIG_BLOCK |
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extern int blk_iopoll_enabled; |
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#endif |
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/* Constants used for minimum and maximum */ |
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#ifdef CONFIG_LOCKUP_DETECTOR |
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static int sixty = 60; #endif |
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static int zero; |
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static int __maybe_unused one = 1; static int __maybe_unused two = 2; |
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static int __maybe_unused three = 3; |
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static unsigned long one_ul = 1; |
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static int one_hundred = 100; |
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#ifdef CONFIG_PRINTK static int ten_thousand = 10000; #endif |
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/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; |
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/* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ static int maxolduid = 65535; static int minolduid; |
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static int min_percpu_pagelist_fract = 8; |
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static int ngroups_max = NGROUPS_MAX; |
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static const int cap_last_cap = CAP_LAST_CAP; |
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#ifdef CONFIG_INOTIFY_USER #include <linux/inotify.h> #endif |
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#ifdef CONFIG_SPARC |
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#endif |
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#ifdef CONFIG_SPARC64 extern int sysctl_tsb_ratio; #endif |
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#ifdef __hppa__ extern int pwrsw_enabled; |
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#endif #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW |
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extern int unaligned_enabled; #endif |
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#ifdef CONFIG_IA64 |
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extern int unaligned_dump_stack; |
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#endif |
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#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN extern int no_unaligned_warning; #endif |
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#ifdef CONFIG_PROC_SYSCTL |
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static int proc_do_cad_pid(struct ctl_table *table, int write, |
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void __user *buffer, size_t *lenp, loff_t *ppos); |
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static int proc_taint(struct ctl_table *table, int write, |
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void __user *buffer, size_t *lenp, loff_t *ppos); |
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#endif |
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#ifdef CONFIG_PRINTK |
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static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
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void __user *buffer, size_t *lenp, loff_t *ppos); #endif |
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static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); |
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#ifdef CONFIG_COREDUMP |
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static int proc_dostring_coredump(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); |
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#endif |
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#ifdef CONFIG_MAGIC_SYSRQ |
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/* Note: sysrq code uses it's own private copy */ static int __sysrq_enabled = SYSRQ_DEFAULT_ENABLE; |
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static int sysrq_sysctl_handler(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 |
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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[]; |
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#ifdef CONFIG_EPOLL extern struct ctl_table epoll_table[]; #endif |
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#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT int sysctl_legacy_va_layout; #endif |
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/* The default sysctl tables: */ |
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static struct ctl_table sysctl_base_table[] = { |
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{ |
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.procname = "kernel", .mode = 0555, .child = kern_table, }, { |
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.procname = "vm", .mode = 0555, .child = vm_table, }, |
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{ |
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.procname = "fs", .mode = 0555, .child = fs_table, }, { |
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.procname = "debug", .mode = 0555, .child = debug_table, }, { |
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.procname = "dev", .mode = 0555, .child = dev_table, }, |
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{ } |
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}; |
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#ifdef CONFIG_SCHED_DEBUG |
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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 */ |
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#ifdef CONFIG_SMP |
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static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; |
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#endif /* CONFIG_SMP */ #endif /* CONFIG_SCHED_DEBUG */ |
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#ifdef CONFIG_COMPACTION static int min_extfrag_threshold; static int max_extfrag_threshold = 1000; #endif |
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static struct ctl_table kern_table[] = { |
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{ |
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.procname = "sched_child_runs_first", .data = &sysctl_sched_child_runs_first, .maxlen = sizeof(unsigned int), .mode = 0644, |
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.proc_handler = proc_dointvec, |
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}, |
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#ifdef CONFIG_SCHED_DEBUG { |
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.procname = "sched_min_granularity_ns", .data = &sysctl_sched_min_granularity, |
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.maxlen = sizeof(unsigned int), .mode = 0644, |
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.proc_handler = sched_proc_update_handler, |
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.extra1 = &min_sched_granularity_ns, .extra2 = &max_sched_granularity_ns, |
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}, { |
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.procname = "sched_latency_ns", .data = &sysctl_sched_latency, .maxlen = sizeof(unsigned int), .mode = 0644, |
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.proc_handler = sched_proc_update_handler, |
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.extra1 = &min_sched_granularity_ns, .extra2 = &max_sched_granularity_ns, }, { |
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.procname = "sched_wakeup_granularity_ns", .data = &sysctl_sched_wakeup_granularity, .maxlen = sizeof(unsigned int), .mode = 0644, |
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.proc_handler = sched_proc_update_handler, |
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.extra1 = &min_wakeup_granularity_ns, .extra2 = &max_wakeup_granularity_ns, }, |
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#ifdef CONFIG_SMP |
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{ |
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.procname = "sched_tunable_scaling", .data = &sysctl_sched_tunable_scaling, .maxlen = sizeof(enum sched_tunable_scaling), .mode = 0644, |
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.proc_handler = sched_proc_update_handler, |
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.extra1 = &min_sched_tunable_scaling, .extra2 = &max_sched_tunable_scaling, |
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}, { |
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.procname = "sched_migration_cost_ns", |
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.data = &sysctl_sched_migration_cost, .maxlen = sizeof(unsigned int), .mode = 0644, |
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.proc_handler = proc_dointvec, |
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}, |
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{ |
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.procname = "sched_nr_migrate", .data = &sysctl_sched_nr_migrate, .maxlen = sizeof(unsigned int), |
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.mode = 0644, |
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.proc_handler = proc_dointvec, |
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}, |
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{ |
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.procname = "sched_time_avg_ms", |
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.data = &sysctl_sched_time_avg, .maxlen = sizeof(unsigned int), .mode = 0644, |
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.proc_handler = proc_dointvec, |
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}, { |
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.procname = "sched_shares_window_ns", |
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.data = &sysctl_sched_shares_window, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { |
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.procname = "timer_migration", .data = &sysctl_timer_migration, .maxlen = sizeof(unsigned int), .mode = 0644, |
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.proc_handler = proc_dointvec_minmax, |
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.extra1 = &zero, .extra2 = &one, |
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}, |
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#endif /* CONFIG_SMP */ #ifdef CONFIG_NUMA_BALANCING { |
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.procname = "numa_balancing_scan_delay_ms", .data = &sysctl_numa_balancing_scan_delay, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { |
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.procname = "numa_balancing_scan_period_min_ms", .data = &sysctl_numa_balancing_scan_period_min, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { |
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.procname = "numa_balancing_scan_period_reset", .data = &sysctl_numa_balancing_scan_period_reset, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, { |
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.procname = "numa_balancing_scan_period_max_ms", .data = &sysctl_numa_balancing_scan_period_max, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, |
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{ .procname = "numa_balancing_scan_size_mb", .data = &sysctl_numa_balancing_scan_size, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec, }, |
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#endif /* CONFIG_NUMA_BALANCING */ #endif /* CONFIG_SCHED_DEBUG */ |
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{ |
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.procname = "sched_rt_period_us", .data = &sysctl_sched_rt_period, .maxlen = sizeof(unsigned int), .mode = 0644, |
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.proc_handler = sched_rt_handler, |
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}, { |
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.procname = "sched_rt_runtime_us", .data = &sysctl_sched_rt_runtime, .maxlen = sizeof(int), .mode = 0644, |
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.proc_handler = sched_rt_handler, |
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}, |
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{ .procname = "sched_rr_timeslice_ms", .data = &sched_rr_timeslice, .maxlen = sizeof(int), .mode = 0644, .proc_handler = sched_rr_handler, }, |
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#ifdef CONFIG_SCHED_AUTOGROUP { .procname = "sched_autogroup_enabled", .data = &sysctl_sched_autogroup_enabled, .maxlen = sizeof(unsigned int), .mode = 0644, |
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.proc_handler = proc_dointvec_minmax, |
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.extra1 = &zero, .extra2 = &one, }, #endif |
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#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 |
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#ifdef CONFIG_PROVE_LOCKING { |
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.procname = "prove_locking", .data = &prove_locking, .maxlen = sizeof(int), .mode = 0644, |
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.proc_handler = proc_dointvec, |
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}, #endif #ifdef CONFIG_LOCK_STAT { |
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.procname = "lock_stat", .data = &lock_stat, .maxlen = sizeof(int), .mode = 0644, |
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.proc_handler = proc_dointvec, |
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}, #endif |
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{ |
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.procname = "panic", .data = &panic_timeout, .maxlen = sizeof(int), .mode = 0644, |
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.proc_handler = proc_dointvec, |
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}, |
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#ifdef CONFIG_COREDUMP |
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{ |
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.procname = "core_uses_pid", .data = &core_uses_pid, .maxlen = sizeof(int), .mode = 0644, |
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.proc_handler = proc_dointvec, |
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}, { |
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.procname = "core_pattern", .data = core_pattern, |
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.maxlen = CORENAME_MAX_SIZE, |
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.mode = 0644, |
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.proc_handler = proc_dostring_coredump, |
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}, |
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{ |
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.procname = "core_pipe_limit", .data = &core_pipe_limit, .maxlen = sizeof(unsigned int), .mode = 0644, |
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|
468 |
.proc_handler = proc_dointvec, |
a293980c2
|
469 |
}, |
046d662f4
|
470 |
#endif |
34f5a3989
|
471 |
#ifdef CONFIG_PROC_SYSCTL |
1da177e4c
|
472 |
{ |
1da177e4c
|
473 |
.procname = "tainted", |
25ddbb18a
|
474 |
.maxlen = sizeof(long), |
34f5a3989
|
475 |
.mode = 0644, |
6d4561110
|
476 |
.proc_handler = proc_taint, |
1da177e4c
|
477 |
}, |
34f5a3989
|
478 |
#endif |
9745512ce
|
479 480 481 482 483 484 |
#ifdef CONFIG_LATENCYTOP { .procname = "latencytop", .data = &latencytop_enabled, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
485 |
.proc_handler = proc_dointvec, |
9745512ce
|
486 487 |
}, #endif |
1da177e4c
|
488 489 |
#ifdef CONFIG_BLK_DEV_INITRD { |
1da177e4c
|
490 491 492 493 |
.procname = "real-root-dev", .data = &real_root_dev, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
494 |
.proc_handler = proc_dointvec, |
1da177e4c
|
495 496 |
}, #endif |
45807a1df
|
497 |
{ |
45807a1df
|
498 499 500 501 |
.procname = "print-fatal-signals", .data = &print_fatal_signals, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
502 |
.proc_handler = proc_dointvec, |
45807a1df
|
503 |
}, |
72c57ed50
|
504 |
#ifdef CONFIG_SPARC |
1da177e4c
|
505 |
{ |
1da177e4c
|
506 507 508 509 |
.procname = "reboot-cmd", .data = reboot_command, .maxlen = 256, .mode = 0644, |
6d4561110
|
510 |
.proc_handler = proc_dostring, |
1da177e4c
|
511 512 |
}, { |
1da177e4c
|
513 514 515 516 |
.procname = "stop-a", .data = &stop_a_enabled, .maxlen = sizeof (int), .mode = 0644, |
6d4561110
|
517 |
.proc_handler = proc_dointvec, |
1da177e4c
|
518 519 |
}, { |
1da177e4c
|
520 521 522 523 |
.procname = "scons-poweroff", .data = &scons_pwroff, .maxlen = sizeof (int), .mode = 0644, |
6d4561110
|
524 |
.proc_handler = proc_dointvec, |
1da177e4c
|
525 526 |
}, #endif |
0871420fa
|
527 528 |
#ifdef CONFIG_SPARC64 { |
0871420fa
|
529 530 531 532 |
.procname = "tsb-ratio", .data = &sysctl_tsb_ratio, .maxlen = sizeof (int), .mode = 0644, |
6d4561110
|
533 |
.proc_handler = proc_dointvec, |
0871420fa
|
534 535 |
}, #endif |
1da177e4c
|
536 537 |
#ifdef __hppa__ { |
1da177e4c
|
538 539 540 541 |
.procname = "soft-power", .data = &pwrsw_enabled, .maxlen = sizeof (int), .mode = 0644, |
6d4561110
|
542 |
.proc_handler = proc_dointvec, |
1da177e4c
|
543 |
}, |
bf14e3b97
|
544 545 |
#endif #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW |
1da177e4c
|
546 |
{ |
1da177e4c
|
547 548 549 550 |
.procname = "unaligned-trap", .data = &unaligned_enabled, .maxlen = sizeof (int), .mode = 0644, |
6d4561110
|
551 |
.proc_handler = proc_dointvec, |
1da177e4c
|
552 553 554 |
}, #endif { |
1da177e4c
|
555 556 557 558 |
.procname = "ctrl-alt-del", .data = &C_A_D, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
559 |
.proc_handler = proc_dointvec, |
1da177e4c
|
560 |
}, |
606576ce8
|
561 |
#ifdef CONFIG_FUNCTION_TRACER |
b0fc494fa
|
562 |
{ |
b0fc494fa
|
563 564 565 566 |
.procname = "ftrace_enabled", .data = &ftrace_enabled, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
567 |
.proc_handler = ftrace_enable_sysctl, |
b0fc494fa
|
568 569 |
}, #endif |
f38f1d2aa
|
570 571 |
#ifdef CONFIG_STACK_TRACER { |
f38f1d2aa
|
572 573 574 575 |
.procname = "stack_tracer_enabled", .data = &stack_tracer_enabled, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
576 |
.proc_handler = stack_trace_sysctl, |
f38f1d2aa
|
577 578 |
}, #endif |
944ac4259
|
579 580 |
#ifdef CONFIG_TRACING { |
3299b4dd1
|
581 |
.procname = "ftrace_dump_on_oops", |
944ac4259
|
582 583 584 |
.data = &ftrace_dump_on_oops, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
585 |
.proc_handler = proc_dointvec, |
944ac4259
|
586 |
}, |
de7edd314
|
587 588 589 590 591 592 593 |
{ .procname = "traceoff_on_warning", .data = &__disable_trace_on_warning, .maxlen = sizeof(__disable_trace_on_warning), .mode = 0644, .proc_handler = proc_dointvec, }, |
944ac4259
|
594 |
#endif |
a1ef5adb4
|
595 |
#ifdef CONFIG_MODULES |
1da177e4c
|
596 |
{ |
1da177e4c
|
597 598 599 600 |
.procname = "modprobe", .data = &modprobe_path, .maxlen = KMOD_PATH_LEN, .mode = 0644, |
6d4561110
|
601 |
.proc_handler = proc_dostring, |
1da177e4c
|
602 |
}, |
3d43321b7
|
603 |
{ |
3d43321b7
|
604 605 606 607 608 |
.procname = "modules_disabled", .data = &modules_disabled, .maxlen = sizeof(int), .mode = 0644, /* only handle a transition from default "0" to "1" */ |
6d4561110
|
609 |
.proc_handler = proc_dointvec_minmax, |
3d43321b7
|
610 611 612 |
.extra1 = &one, .extra2 = &one, }, |
1da177e4c
|
613 |
#endif |
3b572b506
|
614 |
|
1da177e4c
|
615 |
{ |
1da177e4c
|
616 |
.procname = "hotplug", |
312c004d3
|
617 618 |
.data = &uevent_helper, .maxlen = UEVENT_HELPER_PATH_LEN, |
1da177e4c
|
619 |
.mode = 0644, |
6d4561110
|
620 |
.proc_handler = proc_dostring, |
1da177e4c
|
621 |
}, |
3b572b506
|
622 |
|
1da177e4c
|
623 624 |
#ifdef CONFIG_CHR_DEV_SG { |
1da177e4c
|
625 626 627 628 |
.procname = "sg-big-buff", .data = &sg_big_buff, .maxlen = sizeof (int), .mode = 0444, |
6d4561110
|
629 |
.proc_handler = proc_dointvec, |
1da177e4c
|
630 631 632 633 |
}, #endif #ifdef CONFIG_BSD_PROCESS_ACCT { |
1da177e4c
|
634 635 636 637 |
.procname = "acct", .data = &acct_parm, .maxlen = 3*sizeof(int), .mode = 0644, |
6d4561110
|
638 |
.proc_handler = proc_dointvec, |
1da177e4c
|
639 640 |
}, #endif |
1da177e4c
|
641 642 |
#ifdef CONFIG_MAGIC_SYSRQ { |
1da177e4c
|
643 |
.procname = "sysrq", |
5d6f647fc
|
644 |
.data = &__sysrq_enabled, |
1da177e4c
|
645 646 |
.maxlen = sizeof (int), .mode = 0644, |
97f5f0cd8
|
647 |
.proc_handler = sysrq_sysctl_handler, |
1da177e4c
|
648 649 |
}, #endif |
d6f8ff738
|
650 |
#ifdef CONFIG_PROC_SYSCTL |
1da177e4c
|
651 |
{ |
1da177e4c
|
652 |
.procname = "cad_pid", |
9ec52099e
|
653 |
.data = NULL, |
1da177e4c
|
654 655 |
.maxlen = sizeof (int), .mode = 0600, |
6d4561110
|
656 |
.proc_handler = proc_do_cad_pid, |
1da177e4c
|
657 |
}, |
d6f8ff738
|
658 |
#endif |
1da177e4c
|
659 |
{ |
1da177e4c
|
660 661 662 663 |
.procname = "threads-max", .data = &max_threads, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
664 |
.proc_handler = proc_dointvec, |
1da177e4c
|
665 666 |
}, { |
1da177e4c
|
667 668 669 670 |
.procname = "random", .mode = 0555, .child = random_table, }, |
1da177e4c
|
671 |
{ |
17f60a7da
|
672 673 674 675 676 |
.procname = "usermodehelper", .mode = 0555, .child = usermodehelper_table, }, { |
1da177e4c
|
677 678 679 680 |
.procname = "overflowuid", .data = &overflowuid, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
681 |
.proc_handler = proc_dointvec_minmax, |
1da177e4c
|
682 683 684 685 |
.extra1 = &minolduid, .extra2 = &maxolduid, }, { |
1da177e4c
|
686 687 688 689 |
.procname = "overflowgid", .data = &overflowgid, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
690 |
.proc_handler = proc_dointvec_minmax, |
1da177e4c
|
691 692 693 |
.extra1 = &minolduid, .extra2 = &maxolduid, }, |
347a8dc3b
|
694 |
#ifdef CONFIG_S390 |
1da177e4c
|
695 696 |
#ifdef CONFIG_MATHEMU { |
1da177e4c
|
697 698 699 700 |
.procname = "ieee_emulation_warnings", .data = &sysctl_ieee_emulation_warnings, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
701 |
.proc_handler = proc_dointvec, |
1da177e4c
|
702 703 |
}, #endif |
1da177e4c
|
704 |
{ |
1da177e4c
|
705 |
.procname = "userprocess_debug", |
ab3c68ee5
|
706 |
.data = &show_unhandled_signals, |
1da177e4c
|
707 708 |
.maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
709 |
.proc_handler = proc_dointvec, |
1da177e4c
|
710 711 712 |
}, #endif { |
1da177e4c
|
713 714 715 716 |
.procname = "pid_max", .data = &pid_max, .maxlen = sizeof (int), .mode = 0644, |
6d4561110
|
717 |
.proc_handler = proc_dointvec_minmax, |
1da177e4c
|
718 719 720 721 |
.extra1 = &pid_max_min, .extra2 = &pid_max_max, }, { |
1da177e4c
|
722 723 724 725 |
.procname = "panic_on_oops", .data = &panic_on_oops, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
726 |
.proc_handler = proc_dointvec, |
1da177e4c
|
727 |
}, |
7ef3d2fd1
|
728 729 |
#if defined CONFIG_PRINTK { |
7ef3d2fd1
|
730 731 732 733 |
.procname = "printk", .data = &console_loglevel, .maxlen = 4*sizeof(int), .mode = 0644, |
6d4561110
|
734 |
.proc_handler = proc_dointvec, |
7ef3d2fd1
|
735 |
}, |
1da177e4c
|
736 |
{ |
1da177e4c
|
737 |
.procname = "printk_ratelimit", |
717115e1a
|
738 |
.data = &printk_ratelimit_state.interval, |
1da177e4c
|
739 740 |
.maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
741 |
.proc_handler = proc_dointvec_jiffies, |
1da177e4c
|
742 743 |
}, { |
1da177e4c
|
744 |
.procname = "printk_ratelimit_burst", |
717115e1a
|
745 |
.data = &printk_ratelimit_state.burst, |
1da177e4c
|
746 747 |
.maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
748 |
.proc_handler = proc_dointvec, |
1da177e4c
|
749 |
}, |
af91322ef
|
750 |
{ |
af91322ef
|
751 752 753 754 |
.procname = "printk_delay", .data = &printk_delay_msec, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
755 |
.proc_handler = proc_dointvec_minmax, |
af91322ef
|
756 757 758 |
.extra1 = &zero, .extra2 = &ten_thousand, }, |
1da177e4c
|
759 |
{ |
eaf06b241
|
760 761 762 763 |
.procname = "dmesg_restrict", .data = &dmesg_restrict, .maxlen = sizeof(int), .mode = 0644, |
620f6e8e8
|
764 |
.proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b241
|
765 766 767 |
.extra1 = &zero, .extra2 = &one, }, |
455cd5ab3
|
768 769 770 771 772 |
{ .procname = "kptr_restrict", .data = &kptr_restrict, .maxlen = sizeof(int), .mode = 0644, |
620f6e8e8
|
773 |
.proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab3
|
774 775 776 |
.extra1 = &zero, .extra2 = &two, }, |
df6e61d4c
|
777 |
#endif |
eaf06b241
|
778 |
{ |
1da177e4c
|
779 780 781 782 |
.procname = "ngroups_max", .data = &ngroups_max, .maxlen = sizeof (int), .mode = 0444, |
6d4561110
|
783 |
.proc_handler = proc_dointvec, |
1da177e4c
|
784 |
}, |
73efc0394
|
785 786 787 788 789 790 791 |
{ .procname = "cap_last_cap", .data = (void *)&cap_last_cap, .maxlen = sizeof(int), .mode = 0444, .proc_handler = proc_dointvec, }, |
58687acba
|
792 |
#if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf10
|
793 |
{ |
58687acba
|
794 |
.procname = "watchdog", |
3c00ea82c
|
795 |
.data = &watchdog_user_enabled, |
504d7cf10
|
796 797 |
.maxlen = sizeof (int), .mode = 0644, |
586692a5a
|
798 799 800 |
.proc_handler = proc_dowatchdog, .extra1 = &zero, .extra2 = &one, |
58687acba
|
801 802 803 |
}, { .procname = "watchdog_thresh", |
586692a5a
|
804 |
.data = &watchdog_thresh, |
58687acba
|
805 806 |
.maxlen = sizeof(int), .mode = 0644, |
586692a5a
|
807 |
.proc_handler = proc_dowatchdog, |
a6572f84c
|
808 |
.extra1 = &zero, |
58687acba
|
809 |
.extra2 = &sixty, |
504d7cf10
|
810 |
}, |
2508ce184
|
811 812 813 814 815 816 817 818 819 |
{ .procname = "softlockup_panic", .data = &softlockup_panic, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &one, }, |
5dc305587
|
820 821 |
{ .procname = "nmi_watchdog", |
3c00ea82c
|
822 |
.data = &watchdog_user_enabled, |
5dc305587
|
823 824 |
.maxlen = sizeof (int), .mode = 0644, |
586692a5a
|
825 826 827 |
.proc_handler = proc_dowatchdog, .extra1 = &zero, .extra2 = &one, |
5dc305587
|
828 829 830 831 832 833 834 835 836 837 |
}, #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, }, |
504d7cf10
|
838 |
#endif |
1da177e4c
|
839 840 |
#if defined(CONFIG_X86) { |
8da5adda9
|
841 842 843 844 |
.procname = "panic_on_unrecovered_nmi", .data = &panic_on_unrecovered_nmi, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
845 |
.proc_handler = proc_dointvec, |
8da5adda9
|
846 847 |
}, { |
5211a242d
|
848 849 850 851 |
.procname = "panic_on_io_nmi", .data = &panic_on_io_nmi, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
852 |
.proc_handler = proc_dointvec, |
5211a242d
|
853 |
}, |
55af77969
|
854 855 856 857 858 859 860 861 862 |
#ifdef CONFIG_DEBUG_STACKOVERFLOW { .procname = "panic_on_stackoverflow", .data = &sysctl_panic_on_stackoverflow, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #endif |
5211a242d
|
863 |
{ |
1da177e4c
|
864 865 866 867 |
.procname = "bootloader_type", .data = &bootloader_type, .maxlen = sizeof (int), .mode = 0444, |
6d4561110
|
868 |
.proc_handler = proc_dointvec, |
1da177e4c
|
869 |
}, |
0741f4d20
|
870 |
{ |
5031296c5
|
871 872 873 874 |
.procname = "bootloader_version", .data = &bootloader_version, .maxlen = sizeof (int), .mode = 0444, |
6d4561110
|
875 |
.proc_handler = proc_dointvec, |
5031296c5
|
876 877 |
}, { |
0741f4d20
|
878 879 880 881 |
.procname = "kstack_depth_to_print", .data = &kstack_depth_to_print, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
882 |
.proc_handler = proc_dointvec, |
0741f4d20
|
883 |
}, |
6e7c40259
|
884 |
{ |
6e7c40259
|
885 886 887 888 |
.procname = "io_delay_type", .data = &io_delay_type, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
889 |
.proc_handler = proc_dointvec, |
6e7c40259
|
890 |
}, |
1da177e4c
|
891 |
#endif |
7a9166e3b
|
892 |
#if defined(CONFIG_MMU) |
1da177e4c
|
893 |
{ |
1da177e4c
|
894 895 896 897 |
.procname = "randomize_va_space", .data = &randomize_va_space, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
898 |
.proc_handler = proc_dointvec, |
1da177e4c
|
899 |
}, |
7a9166e3b
|
900 |
#endif |
0152fb376
|
901 |
#if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5b
|
902 |
{ |
951f22d5b
|
903 904 905 906 |
.procname = "spin_retry", .data = &spin_retry, .maxlen = sizeof (int), .mode = 0644, |
6d4561110
|
907 |
.proc_handler = proc_dointvec, |
951f22d5b
|
908 909 |
}, #endif |
673d5b43d
|
910 |
#if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844d
|
911 |
{ |
c255d844d
|
912 |
.procname = "acpi_video_flags", |
77afcf78a
|
913 |
.data = &acpi_realmode_flags, |
c255d844d
|
914 915 |
.maxlen = sizeof (unsigned long), .mode = 0644, |
6d4561110
|
916 |
.proc_handler = proc_doulongvec_minmax, |
c255d844d
|
917 918 |
}, #endif |
b6fca7253
|
919 |
#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed8
|
920 |
{ |
d2b176ed8
|
921 922 923 924 |
.procname = "ignore-unaligned-usertrap", .data = &no_unaligned_warning, .maxlen = sizeof (int), .mode = 0644, |
6d4561110
|
925 |
.proc_handler = proc_dointvec, |
d2b176ed8
|
926 |
}, |
b6fca7253
|
927 928 |
#endif #ifdef CONFIG_IA64 |
88fc241f5
|
929 |
{ |
88fc241f5
|
930 931 932 933 |
.procname = "unaligned-dump-stack", .data = &unaligned_dump_stack, .maxlen = sizeof (int), .mode = 0644, |
6d4561110
|
934 |
.proc_handler = proc_dointvec, |
88fc241f5
|
935 |
}, |
d2b176ed8
|
936 |
#endif |
e162b39a3
|
937 938 |
#ifdef CONFIG_DETECT_HUNG_TASK { |
e162b39a3
|
939 940 941 942 |
.procname = "hung_task_panic", .data = &sysctl_hung_task_panic, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
943 |
.proc_handler = proc_dointvec_minmax, |
e162b39a3
|
944 945 946 |
.extra1 = &zero, .extra2 = &one, }, |
82a1fcb90
|
947 |
{ |
82a1fcb90
|
948 949 |
.procname = "hung_task_check_count", .data = &sysctl_hung_task_check_count, |
90739081e
|
950 |
.maxlen = sizeof(unsigned long), |
82a1fcb90
|
951 |
.mode = 0644, |
6d4561110
|
952 |
.proc_handler = proc_doulongvec_minmax, |
82a1fcb90
|
953 954 |
}, { |
82a1fcb90
|
955 956 |
.procname = "hung_task_timeout_secs", .data = &sysctl_hung_task_timeout_secs, |
90739081e
|
957 |
.maxlen = sizeof(unsigned long), |
82a1fcb90
|
958 |
.mode = 0644, |
6d4561110
|
959 |
.proc_handler = proc_dohung_task_timeout_secs, |
82a1fcb90
|
960 961 |
}, { |
82a1fcb90
|
962 963 |
.procname = "hung_task_warnings", .data = &sysctl_hung_task_warnings, |
90739081e
|
964 |
.maxlen = sizeof(unsigned long), |
82a1fcb90
|
965 |
.mode = 0644, |
6d4561110
|
966 |
.proc_handler = proc_doulongvec_minmax, |
82a1fcb90
|
967 |
}, |
c4f3b63fe
|
968 |
#endif |
bebfa1013
|
969 970 |
#ifdef CONFIG_COMPAT { |
bebfa1013
|
971 972 973 974 |
.procname = "compat-log", .data = &compat_log, .maxlen = sizeof (int), .mode = 0644, |
6d4561110
|
975 |
.proc_handler = proc_dointvec, |
bebfa1013
|
976 977 |
}, #endif |
23f78d4a0
|
978 979 |
#ifdef CONFIG_RT_MUTEXES { |
23f78d4a0
|
980 981 982 983 |
.procname = "max_lock_depth", .data = &max_lock_depth, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
984 |
.proc_handler = proc_dointvec, |
23f78d4a0
|
985 986 |
}, #endif |
10a0a8d4e
|
987 |
{ |
10a0a8d4e
|
988 989 990 991 |
.procname = "poweroff_cmd", .data = &poweroff_cmd, .maxlen = POWEROFF_CMD_PATH_LEN, .mode = 0644, |
6d4561110
|
992 |
.proc_handler = proc_dostring, |
10a0a8d4e
|
993 |
}, |
0b77f5bfb
|
994 995 |
#ifdef CONFIG_KEYS { |
0b77f5bfb
|
996 997 998 999 1000 |
.procname = "keys", .mode = 0555, .child = key_sysctls, }, #endif |
31a72bce0
|
1001 1002 |
#ifdef CONFIG_RCU_TORTURE_TEST { |
31a72bce0
|
1003 1004 1005 1006 |
.procname = "rcutorture_runnable", .data = &rcutorture_runnable, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
1007 |
.proc_handler = proc_dointvec, |
31a72bce0
|
1008 1009 |
}, #endif |
cdd6c482c
|
1010 |
#ifdef CONFIG_PERF_EVENTS |
aa4a22187
|
1011 1012 1013 1014 1015 1016 |
/* * 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! */ |
1ccd15497
|
1017 |
{ |
cdd6c482c
|
1018 1019 1020 |
.procname = "perf_event_paranoid", .data = &sysctl_perf_event_paranoid, .maxlen = sizeof(sysctl_perf_event_paranoid), |
1ccd15497
|
1021 |
.mode = 0644, |
6d4561110
|
1022 |
.proc_handler = proc_dointvec, |
1ccd15497
|
1023 |
}, |
c5078f78b
|
1024 |
{ |
cdd6c482c
|
1025 1026 1027 |
.procname = "perf_event_mlock_kb", .data = &sysctl_perf_event_mlock, .maxlen = sizeof(sysctl_perf_event_mlock), |
c5078f78b
|
1028 |
.mode = 0644, |
6d4561110
|
1029 |
.proc_handler = proc_dointvec, |
c5078f78b
|
1030 |
}, |
a78ac3258
|
1031 |
{ |
cdd6c482c
|
1032 1033 1034 |
.procname = "perf_event_max_sample_rate", .data = &sysctl_perf_event_sample_rate, .maxlen = sizeof(sysctl_perf_event_sample_rate), |
a78ac3258
|
1035 |
.mode = 0644, |
163ec4354
|
1036 |
.proc_handler = perf_proc_update_handler, |
a78ac3258
|
1037 |
}, |
14c63f17b
|
1038 1039 1040 1041 1042 1043 1044 1045 1046 |
{ .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, }, |
1ccd15497
|
1047 |
#endif |
dfec072ec
|
1048 1049 |
#ifdef CONFIG_KMEMCHECK { |
dfec072ec
|
1050 1051 1052 1053 |
.procname = "kmemcheck", .data = &kmemcheck_enabled, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
1054 |
.proc_handler = proc_dointvec, |
dfec072ec
|
1055 1056 |
}, #endif |
cb684b5bc
|
1057 |
#ifdef CONFIG_BLOCK |
5e605b64a
|
1058 |
{ |
5e605b64a
|
1059 1060 1061 1062 |
.procname = "blk_iopoll", .data = &blk_iopoll_enabled, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
1063 |
.proc_handler = proc_dointvec, |
5e605b64a
|
1064 |
}, |
cb684b5bc
|
1065 |
#endif |
6fce56ec9
|
1066 |
{ } |
1da177e4c
|
1067 |
}; |
d8217f076
|
1068 |
static struct ctl_table vm_table[] = { |
1da177e4c
|
1069 |
{ |
1da177e4c
|
1070 1071 1072 1073 |
.procname = "overcommit_memory", .data = &sysctl_overcommit_memory, .maxlen = sizeof(sysctl_overcommit_memory), .mode = 0644, |
cb16e95fa
|
1074 1075 1076 |
.proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &two, |
1da177e4c
|
1077 1078 |
}, { |
fadd8fbd1
|
1079 1080 1081 1082 |
.procname = "panic_on_oom", .data = &sysctl_panic_on_oom, .maxlen = sizeof(sysctl_panic_on_oom), .mode = 0644, |
cb16e95fa
|
1083 1084 1085 |
.proc_handler = proc_dointvec_minmax, .extra1 = &zero, .extra2 = &two, |
fadd8fbd1
|
1086 1087 |
}, { |
fe071d7e8
|
1088 1089 1090 1091 |
.procname = "oom_kill_allocating_task", .data = &sysctl_oom_kill_allocating_task, .maxlen = sizeof(sysctl_oom_kill_allocating_task), .mode = 0644, |
6d4561110
|
1092 |
.proc_handler = proc_dointvec, |
fe071d7e8
|
1093 1094 |
}, { |
fef1bdd68
|
1095 1096 1097 1098 |
.procname = "oom_dump_tasks", .data = &sysctl_oom_dump_tasks, .maxlen = sizeof(sysctl_oom_dump_tasks), .mode = 0644, |
6d4561110
|
1099 |
.proc_handler = proc_dointvec, |
fef1bdd68
|
1100 1101 |
}, { |
1da177e4c
|
1102 1103 1104 1105 |
.procname = "overcommit_ratio", .data = &sysctl_overcommit_ratio, .maxlen = sizeof(sysctl_overcommit_ratio), .mode = 0644, |
6d4561110
|
1106 |
.proc_handler = proc_dointvec, |
1da177e4c
|
1107 1108 |
}, { |
1da177e4c
|
1109 1110 1111 1112 |
.procname = "page-cluster", .data = &page_cluster, .maxlen = sizeof(int), .mode = 0644, |
cb16e95fa
|
1113 1114 |
.proc_handler = proc_dointvec_minmax, .extra1 = &zero, |
1da177e4c
|
1115 1116 |
}, { |
1da177e4c
|
1117 1118 1119 1120 |
.procname = "dirty_background_ratio", .data = &dirty_background_ratio, .maxlen = sizeof(dirty_background_ratio), .mode = 0644, |
6d4561110
|
1121 |
.proc_handler = dirty_background_ratio_handler, |
1da177e4c
|
1122 1123 1124 1125 |
.extra1 = &zero, .extra2 = &one_hundred, }, { |
2da02997e
|
1126 1127 1128 1129 |
.procname = "dirty_background_bytes", .data = &dirty_background_bytes, .maxlen = sizeof(dirty_background_bytes), .mode = 0644, |
6d4561110
|
1130 |
.proc_handler = dirty_background_bytes_handler, |
fc3501d41
|
1131 |
.extra1 = &one_ul, |
2da02997e
|
1132 1133 |
}, { |
1da177e4c
|
1134 1135 1136 1137 |
.procname = "dirty_ratio", .data = &vm_dirty_ratio, .maxlen = sizeof(vm_dirty_ratio), .mode = 0644, |
6d4561110
|
1138 |
.proc_handler = dirty_ratio_handler, |
1da177e4c
|
1139 1140 1141 1142 |
.extra1 = &zero, .extra2 = &one_hundred, }, { |
2da02997e
|
1143 1144 1145 1146 |
.procname = "dirty_bytes", .data = &vm_dirty_bytes, .maxlen = sizeof(vm_dirty_bytes), .mode = 0644, |
6d4561110
|
1147 |
.proc_handler = dirty_bytes_handler, |
9e4a5bda8
|
1148 |
.extra1 = &dirty_bytes_min, |
2da02997e
|
1149 1150 |
}, { |
1da177e4c
|
1151 |
.procname = "dirty_writeback_centisecs", |
f6ef94381
|
1152 1153 |
.data = &dirty_writeback_interval, .maxlen = sizeof(dirty_writeback_interval), |
1da177e4c
|
1154 |
.mode = 0644, |
6d4561110
|
1155 |
.proc_handler = dirty_writeback_centisecs_handler, |
1da177e4c
|
1156 1157 |
}, { |
1da177e4c
|
1158 |
.procname = "dirty_expire_centisecs", |
f6ef94381
|
1159 1160 |
.data = &dirty_expire_interval, .maxlen = sizeof(dirty_expire_interval), |
1da177e4c
|
1161 |
.mode = 0644, |
cb16e95fa
|
1162 1163 |
.proc_handler = proc_dointvec_minmax, .extra1 = &zero, |
1da177e4c
|
1164 1165 |
}, { |
3965c9ae4
|
1166 1167 1168 |
.procname = "nr_pdflush_threads", .mode = 0444 /* read-only */, .proc_handler = pdflush_proc_obsolete, |
1da177e4c
|
1169 1170 |
}, { |
1da177e4c
|
1171 1172 1173 1174 |
.procname = "swappiness", .data = &vm_swappiness, .maxlen = sizeof(vm_swappiness), .mode = 0644, |
6d4561110
|
1175 |
.proc_handler = proc_dointvec_minmax, |
1da177e4c
|
1176 1177 1178 1179 |
.extra1 = &zero, .extra2 = &one_hundred, }, #ifdef CONFIG_HUGETLB_PAGE |
06808b082
|
1180 |
{ |
1da177e4c
|
1181 |
.procname = "nr_hugepages", |
e5ff21594
|
1182 |
.data = NULL, |
1da177e4c
|
1183 1184 |
.maxlen = sizeof(unsigned long), .mode = 0644, |
6d4561110
|
1185 |
.proc_handler = hugetlb_sysctl_handler, |
1da177e4c
|
1186 1187 |
.extra1 = (void *)&hugetlb_zero, .extra2 = (void *)&hugetlb_infinity, |
06808b082
|
1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 |
}, #ifdef CONFIG_NUMA { .procname = "nr_hugepages_mempolicy", .data = NULL, .maxlen = sizeof(unsigned long), .mode = 0644, .proc_handler = &hugetlb_mempolicy_sysctl_handler, .extra1 = (void *)&hugetlb_zero, .extra2 = (void *)&hugetlb_infinity, }, #endif |
1da177e4c
|
1200 |
{ |
1da177e4c
|
1201 1202 1203 1204 |
.procname = "hugetlb_shm_group", .data = &sysctl_hugetlb_shm_group, .maxlen = sizeof(gid_t), .mode = 0644, |
6d4561110
|
1205 |
.proc_handler = proc_dointvec, |
1da177e4c
|
1206 |
}, |
396faf030
|
1207 |
{ |
396faf030
|
1208 1209 1210 1211 |
.procname = "hugepages_treat_as_movable", .data = &hugepages_treat_as_movable, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
1212 |
.proc_handler = hugetlb_treat_movable_handler, |
396faf030
|
1213 |
}, |
54f9f80d6
|
1214 |
{ |
d1c3fb1f8
|
1215 |
.procname = "nr_overcommit_hugepages", |
e5ff21594
|
1216 1217 |
.data = NULL, .maxlen = sizeof(unsigned long), |
d1c3fb1f8
|
1218 |
.mode = 0644, |
6d4561110
|
1219 |
.proc_handler = hugetlb_overcommit_handler, |
e5ff21594
|
1220 1221 |
.extra1 = (void *)&hugetlb_zero, .extra2 = (void *)&hugetlb_infinity, |
d1c3fb1f8
|
1222 |
}, |
1da177e4c
|
1223 1224 |
#endif { |
1da177e4c
|
1225 1226 1227 1228 |
.procname = "lowmem_reserve_ratio", .data = &sysctl_lowmem_reserve_ratio, .maxlen = sizeof(sysctl_lowmem_reserve_ratio), .mode = 0644, |
6d4561110
|
1229 |
.proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4c
|
1230 1231 |
}, { |
9d0243bca
|
1232 1233 1234 1235 1236 |
.procname = "drop_caches", .data = &sysctl_drop_caches, .maxlen = sizeof(int), .mode = 0644, .proc_handler = drop_caches_sysctl_handler, |
cb16e95fa
|
1237 1238 |
.extra1 = &one, .extra2 = &three, |
9d0243bca
|
1239 |
}, |
76ab0f530
|
1240 1241 1242 1243 1244 1245 1246 1247 |
#ifdef CONFIG_COMPACTION { .procname = "compact_memory", .data = &sysctl_compact_memory, .maxlen = sizeof(int), .mode = 0200, .proc_handler = sysctl_compaction_handler, }, |
5e7719058
|
1248 1249 1250 1251 1252 1253 1254 1255 1256 |
{ .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, }, |
76ab0f530
|
1257 |
#endif /* CONFIG_COMPACTION */ |
9d0243bca
|
1258 |
{ |
1da177e4c
|
1259 1260 1261 1262 |
.procname = "min_free_kbytes", .data = &min_free_kbytes, .maxlen = sizeof(min_free_kbytes), .mode = 0644, |
6d4561110
|
1263 |
.proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4c
|
1264 1265 |
.extra1 = &zero, }, |
8ad4b1fb8
|
1266 |
{ |
8ad4b1fb8
|
1267 1268 1269 1270 |
.procname = "percpu_pagelist_fraction", .data = &percpu_pagelist_fraction, .maxlen = sizeof(percpu_pagelist_fraction), .mode = 0644, |
6d4561110
|
1271 |
.proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb8
|
1272 1273 |
.extra1 = &min_percpu_pagelist_fract, }, |
1da177e4c
|
1274 1275 |
#ifdef CONFIG_MMU { |
1da177e4c
|
1276 1277 1278 1279 |
.procname = "max_map_count", .data = &sysctl_max_map_count, .maxlen = sizeof(sysctl_max_map_count), .mode = 0644, |
3e26120cc
|
1280 |
.proc_handler = proc_dointvec_minmax, |
70da2340f
|
1281 |
.extra1 = &zero, |
1da177e4c
|
1282 |
}, |
dd8632a12
|
1283 1284 |
#else { |
dd8632a12
|
1285 1286 1287 1288 |
.procname = "nr_trim_pages", .data = &sysctl_nr_trim_pages, .maxlen = sizeof(sysctl_nr_trim_pages), .mode = 0644, |
6d4561110
|
1289 |
.proc_handler = proc_dointvec_minmax, |
dd8632a12
|
1290 1291 |
.extra1 = &zero, }, |
1da177e4c
|
1292 1293 |
#endif { |
1da177e4c
|
1294 1295 1296 1297 |
.procname = "laptop_mode", .data = &laptop_mode, .maxlen = sizeof(laptop_mode), .mode = 0644, |
6d4561110
|
1298 |
.proc_handler = proc_dointvec_jiffies, |
1da177e4c
|
1299 1300 |
}, { |
1da177e4c
|
1301 1302 1303 1304 |
.procname = "block_dump", .data = &block_dump, .maxlen = sizeof(block_dump), .mode = 0644, |
6d4561110
|
1305 |
.proc_handler = proc_dointvec, |
1da177e4c
|
1306 1307 1308 |
.extra1 = &zero, }, { |
1da177e4c
|
1309 1310 1311 1312 |
.procname = "vfs_cache_pressure", .data = &sysctl_vfs_cache_pressure, .maxlen = sizeof(sysctl_vfs_cache_pressure), .mode = 0644, |
6d4561110
|
1313 |
.proc_handler = proc_dointvec, |
1da177e4c
|
1314 1315 1316 1317 |
.extra1 = &zero, }, #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT { |
1da177e4c
|
1318 1319 1320 1321 |
.procname = "legacy_va_layout", .data = &sysctl_legacy_va_layout, .maxlen = sizeof(sysctl_legacy_va_layout), .mode = 0644, |
6d4561110
|
1322 |
.proc_handler = proc_dointvec, |
1da177e4c
|
1323 1324 1325 |
.extra1 = &zero, }, #endif |
1743660b9
|
1326 1327 |
#ifdef CONFIG_NUMA { |
1743660b9
|
1328 1329 1330 1331 |
.procname = "zone_reclaim_mode", .data = &zone_reclaim_mode, .maxlen = sizeof(zone_reclaim_mode), .mode = 0644, |
6d4561110
|
1332 |
.proc_handler = proc_dointvec, |
c84db23c6
|
1333 |
.extra1 = &zero, |
1743660b9
|
1334 |
}, |
9614634fe
|
1335 |
{ |
9614634fe
|
1336 1337 1338 1339 |
.procname = "min_unmapped_ratio", .data = &sysctl_min_unmapped_ratio, .maxlen = sizeof(sysctl_min_unmapped_ratio), .mode = 0644, |
6d4561110
|
1340 |
.proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634fe
|
1341 1342 1343 |
.extra1 = &zero, .extra2 = &one_hundred, }, |
0ff38490c
|
1344 |
{ |
0ff38490c
|
1345 1346 1347 1348 |
.procname = "min_slab_ratio", .data = &sysctl_min_slab_ratio, .maxlen = sizeof(sysctl_min_slab_ratio), .mode = 0644, |
6d4561110
|
1349 |
.proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490c
|
1350 1351 1352 |
.extra1 = &zero, .extra2 = &one_hundred, }, |
1743660b9
|
1353 |
#endif |
77461ab33
|
1354 1355 |
#ifdef CONFIG_SMP { |
77461ab33
|
1356 1357 1358 1359 |
.procname = "stat_interval", .data = &sysctl_stat_interval, .maxlen = sizeof(sysctl_stat_interval), .mode = 0644, |
6d4561110
|
1360 |
.proc_handler = proc_dointvec_jiffies, |
77461ab33
|
1361 1362 |
}, #endif |
6e1415467
|
1363 |
#ifdef CONFIG_MMU |
ed0321895
|
1364 |
{ |
ed0321895
|
1365 |
.procname = "mmap_min_addr", |
788084aba
|
1366 1367 |
.data = &dac_mmap_min_addr, .maxlen = sizeof(unsigned long), |
ed0321895
|
1368 |
.mode = 0644, |
6d4561110
|
1369 |
.proc_handler = mmap_min_addr_handler, |
ed0321895
|
1370 |
}, |
6e1415467
|
1371 |
#endif |
f0c0b2b80
|
1372 1373 |
#ifdef CONFIG_NUMA { |
f0c0b2b80
|
1374 1375 1376 1377 |
.procname = "numa_zonelist_order", .data = &numa_zonelist_order, .maxlen = NUMA_ZONELIST_ORDER_LEN, .mode = 0644, |
6d4561110
|
1378 |
.proc_handler = numa_zonelist_order_handler, |
f0c0b2b80
|
1379 1380 |
}, #endif |
2b8232ce5
|
1381 |
#if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e6578
|
1382 |
(defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494cb
|
1383 |
{ |
e6e5494cb
|
1384 1385 1386 1387 |
.procname = "vdso_enabled", .data = &vdso_enabled, .maxlen = sizeof(vdso_enabled), .mode = 0644, |
6d4561110
|
1388 |
.proc_handler = proc_dointvec, |
e6e5494cb
|
1389 1390 1391 |
.extra1 = &zero, }, #endif |
195cf453d
|
1392 1393 |
#ifdef CONFIG_HIGHMEM { |
195cf453d
|
1394 1395 1396 1397 |
.procname = "highmem_is_dirtyable", .data = &vm_highmem_is_dirtyable, .maxlen = sizeof(vm_highmem_is_dirtyable), .mode = 0644, |
6d4561110
|
1398 |
.proc_handler = proc_dointvec_minmax, |
195cf453d
|
1399 1400 1401 1402 |
.extra1 = &zero, .extra2 = &one, }, #endif |
4be6f6bb6
|
1403 |
{ |
4be6f6bb6
|
1404 1405 1406 1407 |
.procname = "scan_unevictable_pages", .data = &scan_unevictable_pages, .maxlen = sizeof(scan_unevictable_pages), .mode = 0644, |
6d4561110
|
1408 |
.proc_handler = scan_unevictable_handler, |
4be6f6bb6
|
1409 |
}, |
6a46079cf
|
1410 1411 |
#ifdef CONFIG_MEMORY_FAILURE { |
6a46079cf
|
1412 1413 1414 1415 |
.procname = "memory_failure_early_kill", .data = &sysctl_memory_failure_early_kill, .maxlen = sizeof(sysctl_memory_failure_early_kill), .mode = 0644, |
6d4561110
|
1416 |
.proc_handler = proc_dointvec_minmax, |
6a46079cf
|
1417 1418 1419 1420 |
.extra1 = &zero, .extra2 = &one, }, { |
6a46079cf
|
1421 1422 1423 1424 |
.procname = "memory_failure_recovery", .data = &sysctl_memory_failure_recovery, .maxlen = sizeof(sysctl_memory_failure_recovery), .mode = 0644, |
6d4561110
|
1425 |
.proc_handler = proc_dointvec_minmax, |
6a46079cf
|
1426 1427 1428 1429 |
.extra1 = &zero, .extra2 = &one, }, #endif |
c9b1d0981
|
1430 1431 1432 1433 1434 1435 1436 |
{ .procname = "user_reserve_kbytes", .data = &sysctl_user_reserve_kbytes, .maxlen = sizeof(sysctl_user_reserve_kbytes), .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, |
4eeab4f55
|
1437 1438 1439 1440 1441 1442 1443 |
{ .procname = "admin_reserve_kbytes", .data = &sysctl_admin_reserve_kbytes, .maxlen = sizeof(sysctl_admin_reserve_kbytes), .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, |
6fce56ec9
|
1444 |
{ } |
1da177e4c
|
1445 |
}; |
2abc26fc6
|
1446 |
#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f076
|
1447 |
static struct ctl_table binfmt_misc_table[] = { |
6fce56ec9
|
1448 |
{ } |
2abc26fc6
|
1449 1450 |
}; #endif |
d8217f076
|
1451 |
static struct ctl_table fs_table[] = { |
1da177e4c
|
1452 |
{ |
1da177e4c
|
1453 1454 1455 1456 |
.procname = "inode-nr", .data = &inodes_stat, .maxlen = 2*sizeof(int), .mode = 0444, |
cffbc8aa3
|
1457 |
.proc_handler = proc_nr_inodes, |
1da177e4c
|
1458 1459 |
}, { |
1da177e4c
|
1460 1461 1462 1463 |
.procname = "inode-state", .data = &inodes_stat, .maxlen = 7*sizeof(int), .mode = 0444, |
cffbc8aa3
|
1464 |
.proc_handler = proc_nr_inodes, |
1da177e4c
|
1465 1466 |
}, { |
1da177e4c
|
1467 1468 |
.procname = "file-nr", .data = &files_stat, |
518de9b39
|
1469 |
.maxlen = sizeof(files_stat), |
1da177e4c
|
1470 |
.mode = 0444, |
6d4561110
|
1471 |
.proc_handler = proc_nr_files, |
1da177e4c
|
1472 1473 |
}, { |
1da177e4c
|
1474 1475 |
.procname = "file-max", .data = &files_stat.max_files, |
518de9b39
|
1476 |
.maxlen = sizeof(files_stat.max_files), |
1da177e4c
|
1477 |
.mode = 0644, |
518de9b39
|
1478 |
.proc_handler = proc_doulongvec_minmax, |
1da177e4c
|
1479 1480 |
}, { |
9cfe015aa
|
1481 1482 1483 1484 |
.procname = "nr_open", .data = &sysctl_nr_open, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
1485 |
.proc_handler = proc_dointvec_minmax, |
eceea0b3d
|
1486 1487 |
.extra1 = &sysctl_nr_open_min, .extra2 = &sysctl_nr_open_max, |
9cfe015aa
|
1488 1489 |
}, { |
1da177e4c
|
1490 1491 1492 1493 |
.procname = "dentry-state", .data = &dentry_stat, .maxlen = 6*sizeof(int), .mode = 0444, |
312d3ca85
|
1494 |
.proc_handler = proc_nr_dentry, |
1da177e4c
|
1495 1496 |
}, { |
1da177e4c
|
1497 1498 1499 1500 |
.procname = "overflowuid", .data = &fs_overflowuid, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
1501 |
.proc_handler = proc_dointvec_minmax, |
1da177e4c
|
1502 1503 1504 1505 |
.extra1 = &minolduid, .extra2 = &maxolduid, }, { |
1da177e4c
|
1506 1507 1508 1509 |
.procname = "overflowgid", .data = &fs_overflowgid, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
1510 |
.proc_handler = proc_dointvec_minmax, |
1da177e4c
|
1511 1512 1513 |
.extra1 = &minolduid, .extra2 = &maxolduid, }, |
bfcd17a6c
|
1514 |
#ifdef CONFIG_FILE_LOCKING |
1da177e4c
|
1515 |
{ |
1da177e4c
|
1516 1517 1518 1519 |
.procname = "leases-enable", .data = &leases_enable, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
1520 |
.proc_handler = proc_dointvec, |
1da177e4c
|
1521 |
}, |
bfcd17a6c
|
1522 |
#endif |
1da177e4c
|
1523 1524 |
#ifdef CONFIG_DNOTIFY { |
1da177e4c
|
1525 1526 1527 1528 |
.procname = "dir-notify-enable", .data = &dir_notify_enable, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
1529 |
.proc_handler = proc_dointvec, |
1da177e4c
|
1530 1531 1532 |
}, #endif #ifdef CONFIG_MMU |
bfcd17a6c
|
1533 |
#ifdef CONFIG_FILE_LOCKING |
1da177e4c
|
1534 |
{ |
1da177e4c
|
1535 1536 1537 1538 |
.procname = "lease-break-time", .data = &lease_break_time, .maxlen = sizeof(int), .mode = 0644, |
6d4561110
|
1539 |
.proc_handler = proc_dointvec, |
1da177e4c
|
1540 |
}, |
bfcd17a6c
|
1541 |
#endif |
ebf3f09c6
|
1542 |
#ifdef CONFIG_AIO |
1da177e4c
|
1543 |
{ |
1da177e4c
|
1544 1545 1546 1547 |
.procname = "aio-nr", .data = &aio_nr, .maxlen = sizeof(aio_nr), .mode = 0444, |
6d4561110
|
1548 |
.proc_handler = proc_doulongvec_minmax, |
1da177e4c
|
1549 1550 |
}, { |
1da177e4c
|
1551 1552 1553 1554 |
.procname = "aio-max-nr", .data = &aio_max_nr, .maxlen = sizeof(aio_max_nr), .mode = 0644, |
6d4561110
|
1555 |
.proc_handler = proc_doulongvec_minmax, |
1da177e4c
|
1556 |
}, |
ebf3f09c6
|
1557 |
#endif /* CONFIG_AIO */ |
2d9048e20
|
1558 |
#ifdef CONFIG_INOTIFY_USER |
0399cb08c
|
1559 |
{ |
0399cb08c
|
1560 1561 1562 1563 1564 |
.procname = "inotify", .mode = 0555, .child = inotify_table, }, #endif |
7ef9964e6
|
1565 1566 1567 1568 1569 1570 1571 |
#ifdef CONFIG_EPOLL { .procname = "epoll", .mode = 0555, .child = epoll_table, }, #endif |
1da177e4c
|
1572 |
#endif |
d6e711448
|
1573 |
{ |
800179c9b
|
1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 |
.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, }, { |
d6e711448
|
1592 1593 1594 1595 |
.procname = "suid_dumpable", .data = &suid_dumpable, .maxlen = sizeof(int), .mode = 0644, |
54b501992
|
1596 |
.proc_handler = proc_dointvec_minmax_coredump, |
8e654fba4
|
1597 1598 |
.extra1 = &zero, .extra2 = &two, |
d6e711448
|
1599 |
}, |
2abc26fc6
|
1600 1601 |
#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) { |
2abc26fc6
|
1602 1603 1604 1605 1606 |
.procname = "binfmt_misc", .mode = 0555, .child = binfmt_misc_table, }, #endif |
b492e95be
|
1607 |
{ |
ff9da691c
|
1608 1609 |
.procname = "pipe-max-size", .data = &pipe_max_size, |
b492e95be
|
1610 1611 |
.maxlen = sizeof(int), .mode = 0644, |
ff9da691c
|
1612 1613 |
.proc_handler = &pipe_proc_fn, .extra1 = &pipe_min_size, |
b492e95be
|
1614 |
}, |
6fce56ec9
|
1615 |
{ } |
1da177e4c
|
1616 |
}; |
d8217f076
|
1617 |
static struct ctl_table debug_table[] = { |
7ac57a89d
|
1618 |
#ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f7505
|
1619 |
{ |
abd4f7505
|
1620 1621 1622 1623 1624 1625 1626 |
.procname = "exception-trace", .data = &show_unhandled_signals, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec }, #endif |
b2be84df9
|
1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 |
#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 |
6fce56ec9
|
1638 |
{ } |
1da177e4c
|
1639 |
}; |
d8217f076
|
1640 |
static struct ctl_table dev_table[] = { |
6fce56ec9
|
1641 |
{ } |
0eeca2830
|
1642 |
}; |
1da177e4c
|
1643 |
|
de4e83bd6
|
1644 |
int __init sysctl_init(void) |
d912b0cc1
|
1645 |
{ |
fd4b616b0
|
1646 1647 1648 1649 |
struct ctl_table_header *hdr; hdr = register_sysctl_table(sysctl_base_table); kmemleak_not_leak(hdr); |
d912b0cc1
|
1650 1651 |
return 0; } |
b89a81712
|
1652 |
#endif /* CONFIG_SYSCTL */ |
1da177e4c
|
1653 1654 1655 |
/* * /proc/sys support */ |
b89a81712
|
1656 |
#ifdef CONFIG_PROC_SYSCTL |
1da177e4c
|
1657 |
|
b1ba4ddde
|
1658 |
static int _proc_do_string(void* data, int maxlen, int write, |
8d65af789
|
1659 |
void __user *buffer, |
b1ba4ddde
|
1660 |
size_t *lenp, loff_t *ppos) |
1da177e4c
|
1661 1662 1663 1664 |
{ size_t len; char __user *p; char c; |
8d0608771
|
1665 1666 |
if (!data || !maxlen || !*lenp) { |
1da177e4c
|
1667 1668 1669 |
*lenp = 0; return 0; } |
8d0608771
|
1670 |
|
1da177e4c
|
1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 |
if (write) { len = 0; p = buffer; while (len < *lenp) { if (get_user(c, p++)) return -EFAULT; if (c == 0 || c == ' ') break; len++; } |
f5dd3d6fa
|
1682 1683 1684 |
if (len >= maxlen) len = maxlen-1; if(copy_from_user(data, buffer, len)) |
1da177e4c
|
1685 |
return -EFAULT; |
f5dd3d6fa
|
1686 |
((char *) data)[len] = 0; |
1da177e4c
|
1687 1688 |
*ppos += *lenp; } else { |
f5dd3d6fa
|
1689 1690 1691 |
len = strlen(data); if (len > maxlen) len = maxlen; |
8d0608771
|
1692 1693 1694 1695 1696 1697 1698 1699 |
if (*ppos > len) { *lenp = 0; return 0; } data += *ppos; len -= *ppos; |
1da177e4c
|
1700 1701 1702 |
if (len > *lenp) len = *lenp; if (len) |
f5dd3d6fa
|
1703 |
if(copy_to_user(buffer, data, len)) |
1da177e4c
|
1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 |
return -EFAULT; if (len < *lenp) { if(put_user(' ', ((char __user *) buffer) + len)) return -EFAULT; len++; } *lenp = len; *ppos += len; } return 0; } |
f5dd3d6fa
|
1716 1717 1718 1719 |
/** * proc_dostring - read a string sysctl * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file |
f5dd3d6fa
|
1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 |
* @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 ' ' is added. It is truncated if the buffer is * not large enough. * * Returns 0 on success. */ |
8d65af789
|
1734 |
int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6fa
|
1735 1736 |
void __user *buffer, size_t *lenp, loff_t *ppos) { |
8d65af789
|
1737 |
return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6fa
|
1738 1739 |
buffer, lenp, ppos); } |
00b7c3395
|
1740 1741 1742 1743 1744 1745 1746 1747 |
static size_t proc_skip_spaces(char **buf) { size_t ret; char *tmp = skip_spaces(*buf); ret = tmp - *buf; *buf = tmp; return ret; } |
9f977fb7a
|
1748 1749 1750 1751 1752 1753 1754 1755 1756 |
static void proc_skip_char(char **buf, size_t *size, const char v) { while (*size) { if (**buf != v) break; (*size)--; (*buf)++; } } |
00b7c3395
|
1757 1758 |
#define TMPBUFLEN 22 /** |
0fc377bd6
|
1759 |
* proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c3395
|
1760 |
* |
0fc377bd6
|
1761 1762 1763 1764 1765 1766 1767 |
* @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 |
00b7c3395
|
1768 |
* |
0fc377bd6
|
1769 1770 1771 1772 |
* 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. |
00b7c3395
|
1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 |
*/ 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; |
1da177e4c
|
1812 |
|
00b7c3395
|
1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 |
if (tr && (len < *size)) *tr = *p; *buf += len; *size -= len; return 0; } /** |
0fc377bd6
|
1823 |
* proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c3395
|
1824 |
* |
0fc377bd6
|
1825 1826 1827 1828 |
* @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 |
00b7c3395
|
1829 |
* |
0fc377bd6
|
1830 1831 |
* In case of success %0 is returned and @buf and @size are updated with * the amount of bytes written. |
00b7c3395
|
1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 |
*/ 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; } |
1da177e4c
|
1862 |
|
00b7c3395
|
1863 |
static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4c
|
1864 1865 1866 1867 1868 1869 1870 1871 |
int *valp, int write, void *data) { if (write) { *valp = *negp ? -*lvalp : *lvalp; } else { int val = *valp; if (val < 0) { |
00b7c3395
|
1872 |
*negp = true; |
1da177e4c
|
1873 1874 |
*lvalp = (unsigned long)-val; } else { |
00b7c3395
|
1875 |
*negp = false; |
1da177e4c
|
1876 1877 1878 1879 1880 |
*lvalp = (unsigned long)val; } } return 0; } |
00b7c3395
|
1881 1882 |
static const char proc_wspace_sep[] = { ' ', '\t', ' ' }; |
d8217f076
|
1883 |
static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af789
|
1884 |
int write, void __user *buffer, |
fcfbd547b
|
1885 |
size_t *lenp, loff_t *ppos, |
00b7c3395
|
1886 |
int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4c
|
1887 1888 1889 |
int write, void *data), void *data) { |
00b7c3395
|
1890 1891 1892 1893 |
int *i, vleft, first = 1, err = 0; unsigned long page = 0; size_t left; char *kbuf; |
1da177e4c
|
1894 |
|
00b7c3395
|
1895 |
if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4c
|
1896 1897 1898 1899 |
*lenp = 0; return 0; } |
fcfbd547b
|
1900 |
i = (int *) tbl_data; |
1da177e4c
|
1901 1902 1903 1904 1905 |
vleft = table->maxlen / sizeof(*i); left = *lenp; if (!conv) conv = do_proc_dointvec_conv; |
00b7c3395
|
1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 |
if (write) { if (left > PAGE_SIZE - 1) left = PAGE_SIZE - 1; page = __get_free_page(GFP_TEMPORARY); kbuf = (char *) page; if (!kbuf) return -ENOMEM; if (copy_from_user(kbuf, buffer, left)) { err = -EFAULT; goto free; } kbuf[left] = 0; } |
1da177e4c
|
1919 |
for (; left && vleft--; i++, first=0) { |
00b7c3395
|
1920 1921 |
unsigned long lval; bool neg; |
1da177e4c
|
1922 |
|
00b7c3395
|
1923 1924 |
if (write) { left -= proc_skip_spaces(&kbuf); |
1da177e4c
|
1925 |
|
563b04671
|
1926 1927 |
if (!left) break; |
00b7c3395
|
1928 1929 1930 1931 |
err = proc_get_long(&kbuf, &left, &lval, &neg, proc_wspace_sep, sizeof(proc_wspace_sep), NULL); if (err) |
1da177e4c
|
1932 |
break; |
00b7c3395
|
1933 1934 |
if (conv(&neg, &lval, i, 1, data)) { err = -EINVAL; |
1da177e4c
|
1935 |
break; |
00b7c3395
|
1936 |
} |
1da177e4c
|
1937 |
} else { |
00b7c3395
|
1938 1939 1940 1941 |
if (conv(&neg, &lval, i, 0, data)) { err = -EINVAL; break; } |
1da177e4c
|
1942 |
if (!first) |
00b7c3395
|
1943 1944 1945 1946 1947 |
err = proc_put_char(&buffer, &left, '\t'); if (err) break; err = proc_put_long(&buffer, &left, lval, neg); if (err) |
1da177e4c
|
1948 |
break; |
1da177e4c
|
1949 1950 |
} } |
00b7c3395
|
1951 1952 1953 |
if (!write && !first && left && !err) err = proc_put_char(&buffer, &left, ' '); |
563b04671
|
1954 |
if (write && !err && left) |
00b7c3395
|
1955 1956 |
left -= proc_skip_spaces(&kbuf); free: |
1da177e4c
|
1957 |
if (write) { |
00b7c3395
|
1958 1959 1960 |
free_page(page); if (first) return err ? : -EINVAL; |
1da177e4c
|
1961 |
} |
1da177e4c
|
1962 1963 |
*lenp -= left; *ppos += *lenp; |
00b7c3395
|
1964 |
return err; |
1da177e4c
|
1965 |
} |
8d65af789
|
1966 |
static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547b
|
1967 |
void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c3395
|
1968 |
int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547b
|
1969 1970 1971 |
int write, void *data), void *data) { |
8d65af789
|
1972 |
return __do_proc_dointvec(table->data, table, write, |
fcfbd547b
|
1973 1974 |
buffer, lenp, ppos, conv, data); } |
1da177e4c
|
1975 1976 1977 1978 |
/** * proc_dointvec - read a vector of integers * @table: the sysctl table * @write: %TRUE if this is a write to the sysctl file |
1da177e4c
|
1979 1980 1981 1982 1983 1984 1985 1986 1987 |
* @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. */ |
8d65af789
|
1988 |
int proc_dointvec(struct ctl_table *table, int write, |
1da177e4c
|
1989 1990 |
void __user *buffer, size_t *lenp, loff_t *ppos) { |
8d65af789
|
1991 |
return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4c
|
1992 1993 |
NULL,NULL); } |
34f5a3989
|
1994 |
/* |
25ddbb18a
|
1995 1996 |
* Taint values can only be increased * This means we can safely use a temporary. |
34f5a3989
|
1997 |
*/ |
8d65af789
|
1998 |
static int proc_taint(struct ctl_table *table, int write, |
34f5a3989
|
1999 2000 |
void __user *buffer, size_t *lenp, loff_t *ppos) { |
25ddbb18a
|
2001 2002 2003 |
struct ctl_table t; unsigned long tmptaint = get_taint(); int err; |
34f5a3989
|
2004 |
|
91fcd412e
|
2005 |
if (write && !capable(CAP_SYS_ADMIN)) |
34f5a3989
|
2006 |
return -EPERM; |
25ddbb18a
|
2007 2008 |
t = *table; t.data = &tmptaint; |
8d65af789
|
2009 |
err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18a
|
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 |
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) |
373d4d099
|
2021 |
add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18a
|
2022 2023 2024 2025 |
} } return err; |
34f5a3989
|
2026 |
} |
bfdc0b497
|
2027 |
#ifdef CONFIG_PRINTK |
620f6e8e8
|
2028 |
static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b497
|
2029 2030 2031 2032 2033 2034 2035 2036 |
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 |
1da177e4c
|
2037 2038 2039 2040 |
struct do_proc_dointvec_minmax_conv_param { int *min; int *max; }; |
00b7c3395
|
2041 2042 |
static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4c
|
2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 |
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) { |
00b7c3395
|
2055 |
*negp = true; |
1da177e4c
|
2056 2057 |
*lvalp = (unsigned long)-val; } else { |
00b7c3395
|
2058 |
*negp = false; |
1da177e4c
|
2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 |
*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 |
1da177e4c
|
2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 |
* @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. */ |
8d65af789
|
2081 |
int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4c
|
2082 2083 2084 2085 2086 2087 |
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, }; |
8d65af789
|
2088 |
return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4c
|
2089 2090 |
do_proc_dointvec_minmax_conv, ¶m); } |
54b501992
|
2091 2092 |
static void validate_coredump_safety(void) { |
046d662f4
|
2093 |
#ifdef CONFIG_COREDUMP |
e579d2c25
|
2094 |
if (suid_dumpable == SUID_DUMP_ROOT && |
54b501992
|
2095 2096 2097 2098 2099 2100 |
core_pattern[0] != '/' && core_pattern[0] != '|') { printk(KERN_WARNING "Unsafe core_pattern used with "\ "suid_dumpable=2. Pipe handler or fully qualified "\ "core dump path required. "); } |
046d662f4
|
2101 |
#endif |
54b501992
|
2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 |
} 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; } |
046d662f4
|
2112 |
#ifdef CONFIG_COREDUMP |
54b501992
|
2113 2114 2115 2116 2117 2118 2119 2120 |
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; } |
046d662f4
|
2121 |
#endif |
54b501992
|
2122 |
|
d8217f076
|
2123 |
static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4c
|
2124 2125 2126 2127 2128 |
void __user *buffer, size_t *lenp, loff_t *ppos, unsigned long convmul, unsigned long convdiv) { |
00b7c3395
|
2129 2130 2131 2132 2133 2134 2135 |
unsigned long *i, *min, *max; int vleft, first = 1, err = 0; unsigned long page = 0; size_t left; char *kbuf; if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4c
|
2136 2137 2138 |
*lenp = 0; return 0; } |
00b7c3395
|
2139 |
|
fcfbd547b
|
2140 |
i = (unsigned long *) data; |
1da177e4c
|
2141 2142 2143 2144 |
min = (unsigned long *) table->extra1; max = (unsigned long *) table->extra2; vleft = table->maxlen / sizeof(unsigned long); left = *lenp; |
00b7c3395
|
2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 |
if (write) { if (left > PAGE_SIZE - 1) left = PAGE_SIZE - 1; page = __get_free_page(GFP_TEMPORARY); kbuf = (char *) page; if (!kbuf) return -ENOMEM; if (copy_from_user(kbuf, buffer, left)) { err = -EFAULT; goto free; } kbuf[left] = 0; } |
27b3d80a7
|
2159 |
for (; left && vleft--; i++, first = 0) { |
00b7c3395
|
2160 |
unsigned long val; |
1da177e4c
|
2161 |
if (write) { |
00b7c3395
|
2162 2163 2164 2165 2166 2167 2168 2169 |
bool neg; left -= proc_skip_spaces(&kbuf); err = proc_get_long(&kbuf, &left, &val, &neg, proc_wspace_sep, sizeof(proc_wspace_sep), NULL); if (err) |
1da177e4c
|
2170 2171 |
break; if (neg) |
1da177e4c
|
2172 2173 2174 2175 2176 |
continue; if ((min && val < *min) || (max && val > *max)) continue; *i = val; } else { |
00b7c3395
|
2177 |
val = convdiv * (*i) / convmul; |
1da177e4c
|
2178 |
if (!first) |
00b7c3395
|
2179 2180 2181 2182 |
err = proc_put_char(&buffer, &left, '\t'); err = proc_put_long(&buffer, &left, val, false); if (err) break; |
1da177e4c
|
2183 2184 |
} } |
00b7c3395
|
2185 2186 2187 2188 2189 2190 |
if (!write && !first && left && !err) err = proc_put_char(&buffer, &left, ' '); if (write && !err) left -= proc_skip_spaces(&kbuf); free: |
1da177e4c
|
2191 |
if (write) { |
00b7c3395
|
2192 2193 2194 |
free_page(page); if (first) return err ? : -EINVAL; |
1da177e4c
|
2195 |
} |
1da177e4c
|
2196 2197 |
*lenp -= left; *ppos += *lenp; |
00b7c3395
|
2198 |
return err; |
1da177e4c
|
2199 |
} |
d8217f076
|
2200 |
static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547b
|
2201 2202 2203 2204 2205 2206 |
void __user *buffer, size_t *lenp, loff_t *ppos, unsigned long convmul, unsigned long convdiv) { return __do_proc_doulongvec_minmax(table->data, table, write, |
8d65af789
|
2207 |
buffer, lenp, ppos, convmul, convdiv); |
fcfbd547b
|
2208 |
} |
1da177e4c
|
2209 2210 2211 2212 |
/** * 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 |
1da177e4c
|
2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 |
* @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. */ |
8d65af789
|
2225 |
int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4c
|
2226 2227 |
void __user *buffer, size_t *lenp, loff_t *ppos) { |
8d65af789
|
2228 |
return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4c
|
2229 2230 2231 2232 2233 2234 |
} /** * 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 |
1da177e4c
|
2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 |
* @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. */ |
d8217f076
|
2248 |
int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4c
|
2249 2250 2251 |
void __user *buffer, size_t *lenp, loff_t *ppos) { |
8d65af789
|
2252 |
return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4c
|
2253 2254 |
lenp, ppos, HZ, 1000l); } |
00b7c3395
|
2255 |
static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4c
|
2256 2257 2258 2259 |
int *valp, int write, void *data) { if (write) { |
cba9f33d1
|
2260 2261 |
if (*lvalp > LONG_MAX / HZ) return 1; |
1da177e4c
|
2262 2263 2264 2265 2266 |
*valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); } else { int val = *valp; unsigned long lval; if (val < 0) { |
00b7c3395
|
2267 |
*negp = true; |
1da177e4c
|
2268 2269 |
lval = (unsigned long)-val; } else { |
00b7c3395
|
2270 |
*negp = false; |
1da177e4c
|
2271 2272 2273 2274 2275 2276 |
lval = (unsigned long)val; } *lvalp = lval / HZ; } return 0; } |
00b7c3395
|
2277 |
static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4c
|
2278 2279 2280 2281 |
int *valp, int write, void *data) { if (write) { |
cba9f33d1
|
2282 2283 |
if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) return 1; |
1da177e4c
|
2284 2285 2286 2287 2288 |
*valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); } else { int val = *valp; unsigned long lval; if (val < 0) { |
00b7c3395
|
2289 |
*negp = true; |
1da177e4c
|
2290 2291 |
lval = (unsigned long)-val; } else { |
00b7c3395
|
2292 |
*negp = false; |
1da177e4c
|
2293 2294 2295 2296 2297 2298 |
lval = (unsigned long)val; } *lvalp = jiffies_to_clock_t(lval); } return 0; } |
00b7c3395
|
2299 |
static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4c
|
2300 2301 2302 2303 |
int *valp, int write, void *data) { if (write) { |
d738ce8fd
|
2304 2305 2306 2307 2308 |
unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); if (jif > INT_MAX) return 1; *valp = (int)jif; |
1da177e4c
|
2309 2310 2311 2312 |
} else { int val = *valp; unsigned long lval; if (val < 0) { |
00b7c3395
|
2313 |
*negp = true; |
1da177e4c
|
2314 2315 |
lval = (unsigned long)-val; } else { |
00b7c3395
|
2316 |
*negp = false; |
1da177e4c
|
2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 |
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 |
1da177e4c
|
2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 |
* @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. */ |
8d65af789
|
2339 |
int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4c
|
2340 2341 |
void __user *buffer, size_t *lenp, loff_t *ppos) { |
8d65af789
|
2342 |
return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4c
|
2343 2344 2345 2346 2347 2348 2349 |
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 |
1da177e4c
|
2350 2351 |
* @buffer: the user buffer * @lenp: the size of the user buffer |
1e5d53314
|
2352 |
* @ppos: pointer to the file position |
1da177e4c
|
2353 2354 2355 2356 2357 2358 2359 2360 |
* * 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. */ |
8d65af789
|
2361 |
int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4c
|
2362 2363 |
void __user *buffer, size_t *lenp, loff_t *ppos) { |
8d65af789
|
2364 |
return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4c
|
2365 2366 2367 2368 2369 2370 2371 |
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 |
1da177e4c
|
2372 2373 |
* @buffer: the user buffer * @lenp: the size of the user buffer |
67be2dd1b
|
2374 2375 |
* @ppos: file position * @ppos: the current position in the file |
1da177e4c
|
2376 2377 2378 2379 2380 2381 2382 2383 |
* * 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. */ |
8d65af789
|
2384 |
int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4c
|
2385 2386 |
void __user *buffer, size_t *lenp, loff_t *ppos) { |
8d65af789
|
2387 |
return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4c
|
2388 2389 |
do_proc_dointvec_ms_jiffies_conv, NULL); } |
8d65af789
|
2390 |
static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099e
|
2391 2392 2393 2394 2395 |
void __user *buffer, size_t *lenp, loff_t *ppos) { struct pid *new_pid; pid_t tmp; int r; |
6c5f3e7b4
|
2396 |
tmp = pid_vnr(cad_pid); |
9ec52099e
|
2397 |
|
8d65af789
|
2398 |
r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099e
|
2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 |
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; } |
9f977fb7a
|
2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 |
/** * 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[] = { '-', ',', ' ' }, tr_b[] = { ',', ' ', 0 }, c; if (!bitmap_len || !left || (*ppos && !write)) { *lenp = 0; return 0; } if (write) { unsigned long page = 0; char *kbuf; if (left > PAGE_SIZE - 1) left = PAGE_SIZE - 1; page = __get_free_page(GFP_TEMPORARY); kbuf = (char *) page; if (!kbuf) return -ENOMEM; if (copy_from_user(kbuf, buffer, left)) { free_page(page); return -EFAULT; } kbuf[left] = 0; tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), GFP_KERNEL); if (!tmp_bitmap) { free_page(page); return -ENOMEM; } proc_skip_char(&kbuf, &left, ' '); while (!err && left) { unsigned long val_a, val_b; bool neg; err = proc_get_long(&kbuf, &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) { kbuf++; left--; } if (c == '-') { err = proc_get_long(&kbuf, &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) { kbuf++; left--; } } |
5a04cca6c
|
2505 |
bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7a
|
2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 |
first = 0; proc_skip_char(&kbuf, &left, ' '); } free_page(page); } 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, ' '); } if (!err) { if (write) { if (*ppos) bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); else |
5a04cca6c
|
2550 |
bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7a
|
2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 |
} kfree(tmp_bitmap); *lenp -= left; *ppos += *lenp; return 0; } else { kfree(tmp_bitmap); return err; } } |
556105000
|
2561 |
#else /* CONFIG_PROC_SYSCTL */ |
1da177e4c
|
2562 |
|
8d65af789
|
2563 |
int proc_dostring(struct ctl_table *table, int write, |
1da177e4c
|
2564 2565 2566 2567 |
void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } |
8d65af789
|
2568 |
int proc_dointvec(struct ctl_table *table, int write, |
1da177e4c
|
2569 |
void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4c
|
2570 2571 2572 |
{ return -ENOSYS; } |
8d65af789
|
2573 |
int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4c
|
2574 2575 2576 2577 |
void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } |
8d65af789
|
2578 |
int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4c
|
2579 2580 2581 2582 |
void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } |
8d65af789
|
2583 |
int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4c
|
2584 2585 2586 2587 |
void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } |
8d65af789
|
2588 |
int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4c
|
2589 2590 2591 2592 |
void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } |
8d65af789
|
2593 |
int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4c
|
2594 2595 2596 2597 |
void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } |
d8217f076
|
2598 |
int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4c
|
2599 2600 2601 2602 2603 |
void __user *buffer, size_t *lenp, loff_t *ppos) { return -ENOSYS; } |
556105000
|
2604 |
#endif /* CONFIG_PROC_SYSCTL */ |
1da177e4c
|
2605 |
|
1da177e4c
|
2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 |
/* * No sense putting this after each symbol definition, twice, * exception granted :-) */ EXPORT_SYMBOL(proc_dointvec); EXPORT_SYMBOL(proc_dointvec_jiffies); EXPORT_SYMBOL(proc_dointvec_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); |