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3480 lines
81 KiB
3480 lines
81 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* sysctl.c: General linux system control interface |
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* |
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* Begun 24 March 1995, Stephen Tweedie |
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* Added /proc support, Dec 1995 |
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* Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. |
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* Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. |
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* Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. |
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* Dynamic registration fixes, Stephen Tweedie. |
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* Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. |
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* Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris |
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* Horn. |
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* Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. |
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* Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. |
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* Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill |
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* Wendling. |
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* The list_for_each() macro wasn't appropriate for the sysctl loop. |
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* Removed it and replaced it with older style, 03/23/00, Bill Wendling |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/aio.h> |
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#include <linux/mm.h> |
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#include <linux/swap.h> |
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#include <linux/slab.h> |
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#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/panic.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/kmemleak.h> |
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#include <linux/fs.h> |
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#include <linux/init.h> |
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#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> |
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#include <linux/highuid.h> |
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#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> |
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#include <linux/limits.h> |
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#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> |
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#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 <linux/sched/coredump.h> |
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#include <linux/kexec.h> |
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#include <linux/bpf.h> |
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#include <linux/mount.h> |
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#include <linux/userfaultfd_k.h> |
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#include <linux/coredump.h> |
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#include <linux/latencytop.h> |
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#include <linux/pid.h> |
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#include <linux/delayacct.h> |
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|
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#include "../lib/kstrtox.h" |
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|
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#include <linux/uaccess.h> |
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#include <asm/processor.h> |
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|
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#ifdef CONFIG_X86 |
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#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 |
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#include <asm/setup.h> |
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#endif |
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#ifdef CONFIG_BSD_PROCESS_ACCT |
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#include <linux/acct.h> |
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#endif |
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#ifdef CONFIG_RT_MUTEXES |
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#include <linux/rtmutex.h> |
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#endif |
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#if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
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#include <linux/lockdep.h> |
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#endif |
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#ifdef CONFIG_CHR_DEV_SG |
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#include <scsi/sg.h> |
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#endif |
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#ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE |
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#include <linux/stackleak.h> |
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#endif |
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#ifdef CONFIG_LOCKUP_DETECTOR |
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#include <linux/nmi.h> |
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#endif |
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#if defined(CONFIG_SYSCTL) |
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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; |
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#endif |
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static int __maybe_unused neg_one = -1; |
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static int __maybe_unused two = 2; |
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static int __maybe_unused four = 4; |
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static unsigned long zero_ul; |
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static unsigned long one_ul = 1; |
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static unsigned long long_max = LONG_MAX; |
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static int one_hundred = 100; |
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static int two_hundred = 200; |
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static int one_thousand = 1000; |
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#ifdef CONFIG_PRINTK |
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static int ten_thousand = 10000; |
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#endif |
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#ifdef CONFIG_PERF_EVENTS |
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static int six_hundred_forty_kb = 640 * 1024; |
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#endif |
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|
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/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
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static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; |
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|
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/* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
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static int maxolduid = 65535; |
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static int minolduid; |
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|
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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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|
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/* |
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* This is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs |
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* and hung_task_check_interval_secs |
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*/ |
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#ifdef CONFIG_DETECT_HUNG_TASK |
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static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); |
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#endif |
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|
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#ifdef CONFIG_INOTIFY_USER |
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#include <linux/inotify.h> |
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#endif |
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#ifdef CONFIG_FANOTIFY |
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#include <linux/fanotify.h> |
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#endif |
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#ifdef CONFIG_PROC_SYSCTL |
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|
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/** |
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* enum sysctl_writes_mode - supported sysctl write modes |
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* |
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* @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value |
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* to be written, and multiple writes on the same sysctl file descriptor |
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* will rewrite the sysctl value, regardless of file position. No warning |
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* is issued when the initial position is not 0. |
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* @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is |
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* not 0. |
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* @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at |
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* file position 0 and the value must be fully contained in the buffer |
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* sent to the write syscall. If dealing with strings respect the file |
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* position, but restrict this to the max length of the buffer, anything |
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* passed the max length will be ignored. Multiple writes will append |
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* to the buffer. |
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* |
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* These write modes control how current file position affects the behavior of |
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* updating sysctl values through the proc interface on each write. |
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*/ |
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enum sysctl_writes_mode { |
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SYSCTL_WRITES_LEGACY = -1, |
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SYSCTL_WRITES_WARN = 0, |
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SYSCTL_WRITES_STRICT = 1, |
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}; |
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static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
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#endif /* CONFIG_PROC_SYSCTL */ |
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|
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#if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \ |
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defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT) |
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int sysctl_legacy_va_layout; |
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#endif |
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#ifdef CONFIG_COMPACTION |
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static int min_extfrag_threshold; |
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static int max_extfrag_threshold = 1000; |
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#endif |
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#endif /* CONFIG_SYSCTL */ |
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#if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_SYSCTL) |
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static int bpf_stats_handler(struct ctl_table *table, int write, |
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void *buffer, size_t *lenp, loff_t *ppos) |
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{ |
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struct static_key *key = (struct static_key *)table->data; |
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static int saved_val; |
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int val, ret; |
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struct ctl_table tmp = { |
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.data = &val, |
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.maxlen = sizeof(val), |
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.mode = table->mode, |
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.extra1 = SYSCTL_ZERO, |
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.extra2 = SYSCTL_ONE, |
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}; |
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if (write && !capable(CAP_SYS_ADMIN)) |
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return -EPERM; |
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mutex_lock(&bpf_stats_enabled_mutex); |
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val = saved_val; |
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ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
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if (write && !ret && val != saved_val) { |
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if (val) |
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static_key_slow_inc(key); |
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else |
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static_key_slow_dec(key); |
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saved_val = val; |
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} |
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mutex_unlock(&bpf_stats_enabled_mutex); |
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return ret; |
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} |
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static int bpf_unpriv_handler(struct ctl_table *table, int write, |
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void *buffer, size_t *lenp, loff_t *ppos) |
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{ |
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int ret, unpriv_enable = *(int *)table->data; |
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bool locked_state = unpriv_enable == 1; |
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struct ctl_table tmp = *table; |
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if (write && !capable(CAP_SYS_ADMIN)) |
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return -EPERM; |
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tmp.data = &unpriv_enable; |
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ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
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if (write && !ret) { |
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if (locked_state && unpriv_enable != 1) |
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return -EPERM; |
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*(int *)table->data = unpriv_enable; |
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} |
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return ret; |
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} |
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#endif /* CONFIG_BPF_SYSCALL && CONFIG_SYSCTL */ |
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/* |
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* /proc/sys support |
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*/ |
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#ifdef CONFIG_PROC_SYSCTL |
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static int _proc_do_string(char *data, int maxlen, int write, |
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char *buffer, size_t *lenp, loff_t *ppos) |
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{ |
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size_t len; |
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char c, *p; |
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if (!data || !maxlen || !*lenp) { |
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*lenp = 0; |
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return 0; |
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} |
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if (write) { |
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if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
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/* Only continue writes not past the end of buffer. */ |
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len = strlen(data); |
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if (len > maxlen - 1) |
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len = maxlen - 1; |
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if (*ppos > len) |
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return 0; |
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len = *ppos; |
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} else { |
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/* Start writing from beginning of buffer. */ |
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len = 0; |
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} |
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*ppos += *lenp; |
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p = buffer; |
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while ((p - buffer) < *lenp && len < maxlen - 1) { |
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c = *(p++); |
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if (c == 0 || c == '\n') |
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break; |
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data[len++] = c; |
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} |
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data[len] = 0; |
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} else { |
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len = strlen(data); |
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if (len > maxlen) |
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len = maxlen; |
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if (*ppos > len) { |
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*lenp = 0; |
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return 0; |
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} |
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data += *ppos; |
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len -= *ppos; |
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if (len > *lenp) |
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len = *lenp; |
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if (len) |
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memcpy(buffer, data, len); |
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if (len < *lenp) { |
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buffer[len] = '\n'; |
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len++; |
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} |
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*lenp = len; |
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*ppos += len; |
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} |
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return 0; |
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} |
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static void warn_sysctl_write(struct ctl_table *table) |
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{ |
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pr_warn_once("%s wrote to %s when file position was not 0!\n" |
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"This will not be supported in the future. To silence this\n" |
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"warning, set kernel.sysctl_writes_strict = -1\n", |
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current->comm, table->procname); |
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} |
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/** |
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* proc_first_pos_non_zero_ignore - check if first position is allowed |
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* @ppos: file position |
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* @table: the sysctl table |
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* |
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* Returns true if the first position is non-zero and the sysctl_writes_strict |
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* mode indicates this is not allowed for numeric input types. String proc |
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* handlers can ignore the return value. |
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*/ |
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static bool proc_first_pos_non_zero_ignore(loff_t *ppos, |
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struct ctl_table *table) |
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{ |
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if (!*ppos) |
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return false; |
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switch (sysctl_writes_strict) { |
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case SYSCTL_WRITES_STRICT: |
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return true; |
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case SYSCTL_WRITES_WARN: |
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warn_sysctl_write(table); |
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return false; |
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default: |
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return false; |
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} |
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} |
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/** |
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* proc_dostring - read a string sysctl |
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* @table: the sysctl table |
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* @write: %TRUE if this is a write to the sysctl file |
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* @buffer: the user buffer |
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* @lenp: the size of the user buffer |
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* @ppos: file position |
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* |
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* Reads/writes a string from/to the user buffer. If the kernel |
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* buffer provided is not large enough to hold the string, the |
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* string is truncated. The copied string is %NULL-terminated. |
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* If the string is being read by the user process, it is copied |
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* and a newline '\n' is added. It is truncated if the buffer is |
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* not large enough. |
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* |
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* Returns 0 on success. |
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*/ |
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int proc_dostring(struct ctl_table *table, int write, |
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void *buffer, size_t *lenp, loff_t *ppos) |
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{ |
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if (write) |
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proc_first_pos_non_zero_ignore(ppos, table); |
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return _proc_do_string(table->data, table->maxlen, write, buffer, lenp, |
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ppos); |
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} |
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static size_t proc_skip_spaces(char **buf) |
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{ |
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size_t ret; |
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char *tmp = skip_spaces(*buf); |
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ret = tmp - *buf; |
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*buf = tmp; |
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return ret; |
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} |
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static void proc_skip_char(char **buf, size_t *size, const char v) |
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{ |
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while (*size) { |
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if (**buf != v) |
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break; |
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(*size)--; |
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(*buf)++; |
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} |
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} |
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|
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/** |
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* strtoul_lenient - parse an ASCII formatted integer from a buffer and only |
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* fail on overflow |
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* |
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* @cp: kernel buffer containing the string to parse |
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* @endp: pointer to store the trailing characters |
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* @base: the base to use |
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* @res: where the parsed integer will be stored |
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* |
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* In case of success 0 is returned and @res will contain the parsed integer, |
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* @endp will hold any trailing characters. |
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* This function will fail the parse on overflow. If there wasn't an overflow |
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* the function will defer the decision what characters count as invalid to the |
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* caller. |
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*/ |
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static int strtoul_lenient(const char *cp, char **endp, unsigned int base, |
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unsigned long *res) |
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{ |
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unsigned long long result; |
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unsigned int rv; |
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|
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cp = _parse_integer_fixup_radix(cp, &base); |
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rv = _parse_integer(cp, base, &result); |
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if ((rv & KSTRTOX_OVERFLOW) || (result != (unsigned long)result)) |
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return -ERANGE; |
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cp += rv; |
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if (endp) |
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*endp = (char *)cp; |
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*res = (unsigned long)result; |
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return 0; |
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} |
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|
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#define TMPBUFLEN 22 |
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/** |
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* proc_get_long - reads an ASCII formatted integer from a user buffer |
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* |
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* @buf: a kernel buffer |
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* @size: size of the kernel buffer |
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* @val: this is where the number will be stored |
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* @neg: set to %TRUE if number is negative |
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* @perm_tr: a vector which contains the allowed trailers |
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* @perm_tr_len: size of the perm_tr vector |
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* @tr: pointer to store the trailer character |
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* |
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* In case of success %0 is returned and @buf and @size are updated with |
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* the amount of bytes read. If @tr is non-NULL and a trailing |
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* character exists (size is non-zero after returning from this |
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* function), @tr is updated with the trailing character. |
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*/ |
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static int proc_get_long(char **buf, size_t *size, |
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unsigned long *val, bool *neg, |
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const char *perm_tr, unsigned perm_tr_len, char *tr) |
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{ |
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int len; |
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char *p, tmp[TMPBUFLEN]; |
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|
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if (!*size) |
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return -EINVAL; |
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|
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len = *size; |
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if (len > TMPBUFLEN - 1) |
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len = TMPBUFLEN - 1; |
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|
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memcpy(tmp, *buf, len); |
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|
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tmp[len] = 0; |
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p = tmp; |
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if (*p == '-' && *size > 1) { |
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*neg = true; |
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p++; |
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} else |
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*neg = false; |
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if (!isdigit(*p)) |
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return -EINVAL; |
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|
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if (strtoul_lenient(p, &p, 0, val)) |
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return -EINVAL; |
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|
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len = p - tmp; |
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|
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/* We don't know if the next char is whitespace thus we may accept |
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* invalid integers (e.g. 1234...a) or two integers instead of one |
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* (e.g. 123...1). So lets not allow such large numbers. */ |
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if (len == TMPBUFLEN - 1) |
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return -EINVAL; |
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|
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if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) |
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return -EINVAL; |
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|
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if (tr && (len < *size)) |
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*tr = *p; |
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|
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*buf += len; |
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*size -= len; |
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|
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return 0; |
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} |
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|
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/** |
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* proc_put_long - converts an integer to a decimal ASCII formatted string |
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* |
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* @buf: the user buffer |
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* @size: the size of the user buffer |
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* @val: the integer to be converted |
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* @neg: sign of the number, %TRUE for negative |
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* |
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* In case of success @buf and @size are updated with the amount of bytes |
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* written. |
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*/ |
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static void proc_put_long(void **buf, size_t *size, unsigned long val, bool neg) |
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{ |
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int len; |
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char tmp[TMPBUFLEN], *p = tmp; |
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|
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sprintf(p, "%s%lu", neg ? "-" : "", val); |
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len = strlen(tmp); |
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if (len > *size) |
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len = *size; |
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memcpy(*buf, tmp, len); |
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*size -= len; |
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*buf += len; |
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} |
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#undef TMPBUFLEN |
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|
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static void proc_put_char(void **buf, size_t *size, char c) |
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{ |
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if (*size) { |
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char **buffer = (char **)buf; |
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**buffer = c; |
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|
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(*size)--; |
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(*buffer)++; |
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*buf = *buffer; |
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} |
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} |
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|
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static int do_proc_dobool_conv(bool *negp, unsigned long *lvalp, |
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int *valp, |
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int write, void *data) |
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{ |
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if (write) { |
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*(bool *)valp = *lvalp; |
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} else { |
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int val = *(bool *)valp; |
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|
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*lvalp = (unsigned long)val; |
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*negp = false; |
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} |
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return 0; |
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} |
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|
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static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
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int *valp, |
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int write, void *data) |
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{ |
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if (write) { |
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if (*negp) { |
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if (*lvalp > (unsigned long) INT_MAX + 1) |
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return -EINVAL; |
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*valp = -*lvalp; |
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} else { |
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if (*lvalp > (unsigned long) INT_MAX) |
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return -EINVAL; |
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*valp = *lvalp; |
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} |
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} else { |
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int val = *valp; |
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if (val < 0) { |
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*negp = true; |
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*lvalp = -(unsigned long)val; |
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} else { |
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*negp = false; |
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*lvalp = (unsigned long)val; |
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} |
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} |
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return 0; |
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} |
|
|
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static int do_proc_douintvec_conv(unsigned long *lvalp, |
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unsigned int *valp, |
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int write, void *data) |
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{ |
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if (write) { |
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if (*lvalp > UINT_MAX) |
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return -EINVAL; |
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*valp = *lvalp; |
|
} else { |
|
unsigned int val = *valp; |
|
*lvalp = (unsigned long)val; |
|
} |
|
return 0; |
|
} |
|
|
|
static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
|
|
|
static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
|
int write, void *buffer, |
|
size_t *lenp, loff_t *ppos, |
|
int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
|
int write, void *data), |
|
void *data) |
|
{ |
|
int *i, vleft, first = 1, err = 0; |
|
size_t left; |
|
char *p; |
|
|
|
if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
|
*lenp = 0; |
|
return 0; |
|
} |
|
|
|
i = (int *) tbl_data; |
|
vleft = table->maxlen / sizeof(*i); |
|
left = *lenp; |
|
|
|
if (!conv) |
|
conv = do_proc_dointvec_conv; |
|
|
|
if (write) { |
|
if (proc_first_pos_non_zero_ignore(ppos, table)) |
|
goto out; |
|
|
|
if (left > PAGE_SIZE - 1) |
|
left = PAGE_SIZE - 1; |
|
p = buffer; |
|
} |
|
|
|
for (; left && vleft--; i++, first=0) { |
|
unsigned long lval; |
|
bool neg; |
|
|
|
if (write) { |
|
left -= proc_skip_spaces(&p); |
|
|
|
if (!left) |
|
break; |
|
err = proc_get_long(&p, &left, &lval, &neg, |
|
proc_wspace_sep, |
|
sizeof(proc_wspace_sep), NULL); |
|
if (err) |
|
break; |
|
if (conv(&neg, &lval, i, 1, data)) { |
|
err = -EINVAL; |
|
break; |
|
} |
|
} else { |
|
if (conv(&neg, &lval, i, 0, data)) { |
|
err = -EINVAL; |
|
break; |
|
} |
|
if (!first) |
|
proc_put_char(&buffer, &left, '\t'); |
|
proc_put_long(&buffer, &left, lval, neg); |
|
} |
|
} |
|
|
|
if (!write && !first && left && !err) |
|
proc_put_char(&buffer, &left, '\n'); |
|
if (write && !err && left) |
|
left -= proc_skip_spaces(&p); |
|
if (write && first) |
|
return err ? : -EINVAL; |
|
*lenp -= left; |
|
out: |
|
*ppos += *lenp; |
|
return err; |
|
} |
|
|
|
static int do_proc_dointvec(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos, |
|
int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
|
int write, void *data), |
|
void *data) |
|
{ |
|
return __do_proc_dointvec(table->data, table, write, |
|
buffer, lenp, ppos, conv, data); |
|
} |
|
|
|
static int do_proc_douintvec_w(unsigned int *tbl_data, |
|
struct ctl_table *table, |
|
void *buffer, |
|
size_t *lenp, loff_t *ppos, |
|
int (*conv)(unsigned long *lvalp, |
|
unsigned int *valp, |
|
int write, void *data), |
|
void *data) |
|
{ |
|
unsigned long lval; |
|
int err = 0; |
|
size_t left; |
|
bool neg; |
|
char *p = buffer; |
|
|
|
left = *lenp; |
|
|
|
if (proc_first_pos_non_zero_ignore(ppos, table)) |
|
goto bail_early; |
|
|
|
if (left > PAGE_SIZE - 1) |
|
left = PAGE_SIZE - 1; |
|
|
|
left -= proc_skip_spaces(&p); |
|
if (!left) { |
|
err = -EINVAL; |
|
goto out_free; |
|
} |
|
|
|
err = proc_get_long(&p, &left, &lval, &neg, |
|
proc_wspace_sep, |
|
sizeof(proc_wspace_sep), NULL); |
|
if (err || neg) { |
|
err = -EINVAL; |
|
goto out_free; |
|
} |
|
|
|
if (conv(&lval, tbl_data, 1, data)) { |
|
err = -EINVAL; |
|
goto out_free; |
|
} |
|
|
|
if (!err && left) |
|
left -= proc_skip_spaces(&p); |
|
|
|
out_free: |
|
if (err) |
|
return -EINVAL; |
|
|
|
return 0; |
|
|
|
/* This is in keeping with old __do_proc_dointvec() */ |
|
bail_early: |
|
*ppos += *lenp; |
|
return err; |
|
} |
|
|
|
static int do_proc_douintvec_r(unsigned int *tbl_data, void *buffer, |
|
size_t *lenp, loff_t *ppos, |
|
int (*conv)(unsigned long *lvalp, |
|
unsigned int *valp, |
|
int write, void *data), |
|
void *data) |
|
{ |
|
unsigned long lval; |
|
int err = 0; |
|
size_t left; |
|
|
|
left = *lenp; |
|
|
|
if (conv(&lval, tbl_data, 0, data)) { |
|
err = -EINVAL; |
|
goto out; |
|
} |
|
|
|
proc_put_long(&buffer, &left, lval, false); |
|
if (!left) |
|
goto out; |
|
|
|
proc_put_char(&buffer, &left, '\n'); |
|
|
|
out: |
|
*lenp -= left; |
|
*ppos += *lenp; |
|
|
|
return err; |
|
} |
|
|
|
static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, |
|
int write, void *buffer, |
|
size_t *lenp, loff_t *ppos, |
|
int (*conv)(unsigned long *lvalp, |
|
unsigned int *valp, |
|
int write, void *data), |
|
void *data) |
|
{ |
|
unsigned int *i, vleft; |
|
|
|
if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
|
*lenp = 0; |
|
return 0; |
|
} |
|
|
|
i = (unsigned int *) tbl_data; |
|
vleft = table->maxlen / sizeof(*i); |
|
|
|
/* |
|
* Arrays are not supported, keep this simple. *Do not* add |
|
* support for them. |
|
*/ |
|
if (vleft != 1) { |
|
*lenp = 0; |
|
return -EINVAL; |
|
} |
|
|
|
if (!conv) |
|
conv = do_proc_douintvec_conv; |
|
|
|
if (write) |
|
return do_proc_douintvec_w(i, table, buffer, lenp, ppos, |
|
conv, data); |
|
return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); |
|
} |
|
|
|
static int do_proc_douintvec(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos, |
|
int (*conv)(unsigned long *lvalp, |
|
unsigned int *valp, |
|
int write, void *data), |
|
void *data) |
|
{ |
|
return __do_proc_douintvec(table->data, table, write, |
|
buffer, lenp, ppos, conv, data); |
|
} |
|
|
|
/** |
|
* proc_dobool - read/write a bool |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer |
|
* values from/to the user buffer, treated as an ASCII string. |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int proc_dobool(struct ctl_table *table, int write, void *buffer, |
|
size_t *lenp, loff_t *ppos) |
|
{ |
|
return do_proc_dointvec(table, write, buffer, lenp, ppos, |
|
do_proc_dobool_conv, NULL); |
|
} |
|
|
|
/** |
|
* proc_dointvec - read a vector of integers |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer |
|
* values from/to the user buffer, treated as an ASCII string. |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int proc_dointvec(struct ctl_table *table, int write, void *buffer, |
|
size_t *lenp, loff_t *ppos) |
|
{ |
|
return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
|
} |
|
|
|
#ifdef CONFIG_COMPACTION |
|
static int proc_dointvec_minmax_warn_RT_change(struct ctl_table *table, |
|
int write, void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
int ret, old; |
|
|
|
if (!IS_ENABLED(CONFIG_PREEMPT_RT) || !write) |
|
return proc_dointvec_minmax(table, write, buffer, lenp, ppos); |
|
|
|
old = *(int *)table->data; |
|
ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); |
|
if (ret) |
|
return ret; |
|
if (old != *(int *)table->data) |
|
pr_warn_once("sysctl attribute %s changed by %s[%d]\n", |
|
table->procname, current->comm, |
|
task_pid_nr(current)); |
|
return ret; |
|
} |
|
#endif |
|
|
|
/** |
|
* proc_douintvec - read a vector of unsigned integers |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer |
|
* values from/to the user buffer, treated as an ASCII string. |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int proc_douintvec(struct ctl_table *table, int write, void *buffer, |
|
size_t *lenp, loff_t *ppos) |
|
{ |
|
return do_proc_douintvec(table, write, buffer, lenp, ppos, |
|
do_proc_douintvec_conv, NULL); |
|
} |
|
|
|
/* |
|
* Taint values can only be increased |
|
* This means we can safely use a temporary. |
|
*/ |
|
static int proc_taint(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
struct ctl_table t; |
|
unsigned long tmptaint = get_taint(); |
|
int err; |
|
|
|
if (write && !capable(CAP_SYS_ADMIN)) |
|
return -EPERM; |
|
|
|
t = *table; |
|
t.data = &tmptaint; |
|
err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
|
if (err < 0) |
|
return err; |
|
|
|
if (write) { |
|
int i; |
|
|
|
/* |
|
* If we are relying on panic_on_taint not producing |
|
* false positives due to userspace input, bail out |
|
* before setting the requested taint flags. |
|
*/ |
|
if (panic_on_taint_nousertaint && (tmptaint & panic_on_taint)) |
|
return -EINVAL; |
|
|
|
/* |
|
* Poor man's atomic or. Not worth adding a primitive |
|
* to everyone's atomic.h for this |
|
*/ |
|
for (i = 0; i < TAINT_FLAGS_COUNT; i++) |
|
if ((1UL << i) & tmptaint) |
|
add_taint(i, LOCKDEP_STILL_OK); |
|
} |
|
|
|
return err; |
|
} |
|
|
|
#ifdef CONFIG_PRINTK |
|
static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
if (write && !capable(CAP_SYS_ADMIN)) |
|
return -EPERM; |
|
|
|
return proc_dointvec_minmax(table, write, buffer, lenp, ppos); |
|
} |
|
#endif |
|
|
|
/** |
|
* struct do_proc_dointvec_minmax_conv_param - proc_dointvec_minmax() range checking structure |
|
* @min: pointer to minimum allowable value |
|
* @max: pointer to maximum allowable value |
|
* |
|
* The do_proc_dointvec_minmax_conv_param structure provides the |
|
* minimum and maximum values for doing range checking for those sysctl |
|
* parameters that use the proc_dointvec_minmax() handler. |
|
*/ |
|
struct do_proc_dointvec_minmax_conv_param { |
|
int *min; |
|
int *max; |
|
}; |
|
|
|
static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
|
int *valp, |
|
int write, void *data) |
|
{ |
|
int tmp, ret; |
|
struct do_proc_dointvec_minmax_conv_param *param = data; |
|
/* |
|
* If writing, first do so via a temporary local int so we can |
|
* bounds-check it before touching *valp. |
|
*/ |
|
int *ip = write ? &tmp : valp; |
|
|
|
ret = do_proc_dointvec_conv(negp, lvalp, ip, write, data); |
|
if (ret) |
|
return ret; |
|
|
|
if (write) { |
|
if ((param->min && *param->min > tmp) || |
|
(param->max && *param->max < tmp)) |
|
return -EINVAL; |
|
*valp = tmp; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* proc_dointvec_minmax - read a vector of integers with min/max values |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer |
|
* values from/to the user buffer, treated as an ASCII string. |
|
* |
|
* This routine will ensure the values are within the range specified by |
|
* table->extra1 (min) and table->extra2 (max). |
|
* |
|
* Returns 0 on success or -EINVAL on write when the range check fails. |
|
*/ |
|
int proc_dointvec_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
struct do_proc_dointvec_minmax_conv_param param = { |
|
.min = (int *) table->extra1, |
|
.max = (int *) table->extra2, |
|
}; |
|
return do_proc_dointvec(table, write, buffer, lenp, ppos, |
|
do_proc_dointvec_minmax_conv, ¶m); |
|
} |
|
|
|
/** |
|
* struct do_proc_douintvec_minmax_conv_param - proc_douintvec_minmax() range checking structure |
|
* @min: pointer to minimum allowable value |
|
* @max: pointer to maximum allowable value |
|
* |
|
* The do_proc_douintvec_minmax_conv_param structure provides the |
|
* minimum and maximum values for doing range checking for those sysctl |
|
* parameters that use the proc_douintvec_minmax() handler. |
|
*/ |
|
struct do_proc_douintvec_minmax_conv_param { |
|
unsigned int *min; |
|
unsigned int *max; |
|
}; |
|
|
|
static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, |
|
unsigned int *valp, |
|
int write, void *data) |
|
{ |
|
int ret; |
|
unsigned int tmp; |
|
struct do_proc_douintvec_minmax_conv_param *param = data; |
|
/* write via temporary local uint for bounds-checking */ |
|
unsigned int *up = write ? &tmp : valp; |
|
|
|
ret = do_proc_douintvec_conv(lvalp, up, write, data); |
|
if (ret) |
|
return ret; |
|
|
|
if (write) { |
|
if ((param->min && *param->min > tmp) || |
|
(param->max && *param->max < tmp)) |
|
return -ERANGE; |
|
|
|
*valp = tmp; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* proc_douintvec_minmax - read a vector of unsigned ints with min/max values |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer |
|
* values from/to the user buffer, treated as an ASCII string. Negative |
|
* strings are not allowed. |
|
* |
|
* This routine will ensure the values are within the range specified by |
|
* table->extra1 (min) and table->extra2 (max). There is a final sanity |
|
* check for UINT_MAX to avoid having to support wrap around uses from |
|
* userspace. |
|
* |
|
* Returns 0 on success or -ERANGE on write when the range check fails. |
|
*/ |
|
int proc_douintvec_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
struct do_proc_douintvec_minmax_conv_param param = { |
|
.min = (unsigned int *) table->extra1, |
|
.max = (unsigned int *) table->extra2, |
|
}; |
|
return do_proc_douintvec(table, write, buffer, lenp, ppos, |
|
do_proc_douintvec_minmax_conv, ¶m); |
|
} |
|
|
|
/** |
|
* proc_dou8vec_minmax - read a vector of unsigned chars with min/max values |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(u8) unsigned chars |
|
* values from/to the user buffer, treated as an ASCII string. Negative |
|
* strings are not allowed. |
|
* |
|
* This routine will ensure the values are within the range specified by |
|
* table->extra1 (min) and table->extra2 (max). |
|
* |
|
* Returns 0 on success or an error on write when the range check fails. |
|
*/ |
|
int proc_dou8vec_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
struct ctl_table tmp; |
|
unsigned int min = 0, max = 255U, val; |
|
u8 *data = table->data; |
|
struct do_proc_douintvec_minmax_conv_param param = { |
|
.min = &min, |
|
.max = &max, |
|
}; |
|
int res; |
|
|
|
/* Do not support arrays yet. */ |
|
if (table->maxlen != sizeof(u8)) |
|
return -EINVAL; |
|
|
|
if (table->extra1) { |
|
min = *(unsigned int *) table->extra1; |
|
if (min > 255U) |
|
return -EINVAL; |
|
} |
|
if (table->extra2) { |
|
max = *(unsigned int *) table->extra2; |
|
if (max > 255U) |
|
return -EINVAL; |
|
} |
|
|
|
tmp = *table; |
|
|
|
tmp.maxlen = sizeof(val); |
|
tmp.data = &val; |
|
val = *data; |
|
res = do_proc_douintvec(&tmp, write, buffer, lenp, ppos, |
|
do_proc_douintvec_minmax_conv, ¶m); |
|
if (res) |
|
return res; |
|
if (write) |
|
*data = val; |
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(proc_dou8vec_minmax); |
|
|
|
static int do_proc_dopipe_max_size_conv(unsigned long *lvalp, |
|
unsigned int *valp, |
|
int write, void *data) |
|
{ |
|
if (write) { |
|
unsigned int val; |
|
|
|
val = round_pipe_size(*lvalp); |
|
if (val == 0) |
|
return -EINVAL; |
|
|
|
*valp = val; |
|
} else { |
|
unsigned int val = *valp; |
|
*lvalp = (unsigned long) val; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int proc_dopipe_max_size(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return do_proc_douintvec(table, write, buffer, lenp, ppos, |
|
do_proc_dopipe_max_size_conv, NULL); |
|
} |
|
|
|
static void validate_coredump_safety(void) |
|
{ |
|
#ifdef CONFIG_COREDUMP |
|
if (suid_dumpable == SUID_DUMP_ROOT && |
|
core_pattern[0] != '/' && core_pattern[0] != '|') { |
|
printk(KERN_WARNING |
|
"Unsafe core_pattern used with fs.suid_dumpable=2.\n" |
|
"Pipe handler or fully qualified core dump path required.\n" |
|
"Set kernel.core_pattern before fs.suid_dumpable.\n" |
|
); |
|
} |
|
#endif |
|
} |
|
|
|
static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); |
|
if (!error) |
|
validate_coredump_safety(); |
|
return error; |
|
} |
|
|
|
#ifdef CONFIG_COREDUMP |
|
static int proc_dostring_coredump(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
int error = proc_dostring(table, write, buffer, lenp, ppos); |
|
if (!error) |
|
validate_coredump_safety(); |
|
return error; |
|
} |
|
#endif |
|
|
|
#ifdef CONFIG_MAGIC_SYSRQ |
|
static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
int tmp, ret; |
|
|
|
tmp = sysrq_mask(); |
|
|
|
ret = __do_proc_dointvec(&tmp, table, write, buffer, |
|
lenp, ppos, NULL, NULL); |
|
if (ret || !write) |
|
return ret; |
|
|
|
if (write) |
|
sysrq_toggle_support(tmp); |
|
|
|
return 0; |
|
} |
|
#endif |
|
|
|
static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, |
|
int write, void *buffer, size_t *lenp, loff_t *ppos, |
|
unsigned long convmul, unsigned long convdiv) |
|
{ |
|
unsigned long *i, *min, *max; |
|
int vleft, first = 1, err = 0; |
|
size_t left; |
|
char *p; |
|
|
|
if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { |
|
*lenp = 0; |
|
return 0; |
|
} |
|
|
|
i = (unsigned long *) data; |
|
min = (unsigned long *) table->extra1; |
|
max = (unsigned long *) table->extra2; |
|
vleft = table->maxlen / sizeof(unsigned long); |
|
left = *lenp; |
|
|
|
if (write) { |
|
if (proc_first_pos_non_zero_ignore(ppos, table)) |
|
goto out; |
|
|
|
if (left > PAGE_SIZE - 1) |
|
left = PAGE_SIZE - 1; |
|
p = buffer; |
|
} |
|
|
|
for (; left && vleft--; i++, first = 0) { |
|
unsigned long val; |
|
|
|
if (write) { |
|
bool neg; |
|
|
|
left -= proc_skip_spaces(&p); |
|
if (!left) |
|
break; |
|
|
|
err = proc_get_long(&p, &left, &val, &neg, |
|
proc_wspace_sep, |
|
sizeof(proc_wspace_sep), NULL); |
|
if (err) |
|
break; |
|
if (neg) |
|
continue; |
|
val = convmul * val / convdiv; |
|
if ((min && val < *min) || (max && val > *max)) { |
|
err = -EINVAL; |
|
break; |
|
} |
|
*i = val; |
|
} else { |
|
val = convdiv * (*i) / convmul; |
|
if (!first) |
|
proc_put_char(&buffer, &left, '\t'); |
|
proc_put_long(&buffer, &left, val, false); |
|
} |
|
} |
|
|
|
if (!write && !first && left && !err) |
|
proc_put_char(&buffer, &left, '\n'); |
|
if (write && !err) |
|
left -= proc_skip_spaces(&p); |
|
if (write && first) |
|
return err ? : -EINVAL; |
|
*lenp -= left; |
|
out: |
|
*ppos += *lenp; |
|
return err; |
|
} |
|
|
|
static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos, unsigned long convmul, |
|
unsigned long convdiv) |
|
{ |
|
return __do_proc_doulongvec_minmax(table->data, table, write, |
|
buffer, lenp, ppos, convmul, convdiv); |
|
} |
|
|
|
/** |
|
* proc_doulongvec_minmax - read a vector of long integers with min/max values |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long |
|
* values from/to the user buffer, treated as an ASCII string. |
|
* |
|
* This routine will ensure the values are within the range specified by |
|
* table->extra1 (min) and table->extra2 (max). |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int proc_doulongvec_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
|
} |
|
|
|
/** |
|
* proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long |
|
* values from/to the user buffer, treated as an ASCII string. The values |
|
* are treated as milliseconds, and converted to jiffies when they are stored. |
|
* |
|
* This routine will ensure the values are within the range specified by |
|
* table->extra1 (min) and table->extra2 (max). |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return do_proc_doulongvec_minmax(table, write, buffer, |
|
lenp, ppos, HZ, 1000l); |
|
} |
|
|
|
|
|
static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
|
int *valp, |
|
int write, void *data) |
|
{ |
|
if (write) { |
|
if (*lvalp > INT_MAX / HZ) |
|
return 1; |
|
*valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
|
} else { |
|
int val = *valp; |
|
unsigned long lval; |
|
if (val < 0) { |
|
*negp = true; |
|
lval = -(unsigned long)val; |
|
} else { |
|
*negp = false; |
|
lval = (unsigned long)val; |
|
} |
|
*lvalp = lval / HZ; |
|
} |
|
return 0; |
|
} |
|
|
|
static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
|
int *valp, |
|
int write, void *data) |
|
{ |
|
if (write) { |
|
if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
|
return 1; |
|
*valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
|
} else { |
|
int val = *valp; |
|
unsigned long lval; |
|
if (val < 0) { |
|
*negp = true; |
|
lval = -(unsigned long)val; |
|
} else { |
|
*negp = false; |
|
lval = (unsigned long)val; |
|
} |
|
*lvalp = jiffies_to_clock_t(lval); |
|
} |
|
return 0; |
|
} |
|
|
|
static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
|
int *valp, |
|
int write, void *data) |
|
{ |
|
if (write) { |
|
unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
|
|
|
if (jif > INT_MAX) |
|
return 1; |
|
*valp = (int)jif; |
|
} else { |
|
int val = *valp; |
|
unsigned long lval; |
|
if (val < 0) { |
|
*negp = true; |
|
lval = -(unsigned long)val; |
|
} else { |
|
*negp = false; |
|
lval = (unsigned long)val; |
|
} |
|
*lvalp = jiffies_to_msecs(lval); |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* proc_dointvec_jiffies - read a vector of integers as seconds |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer |
|
* values from/to the user buffer, treated as an ASCII string. |
|
* The values read are assumed to be in seconds, and are converted into |
|
* jiffies. |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int proc_dointvec_jiffies(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return do_proc_dointvec(table,write,buffer,lenp,ppos, |
|
do_proc_dointvec_jiffies_conv,NULL); |
|
} |
|
|
|
/** |
|
* proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: pointer to the file position |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer |
|
* values from/to the user buffer, treated as an ASCII string. |
|
* The values read are assumed to be in 1/USER_HZ seconds, and |
|
* are converted into jiffies. |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return do_proc_dointvec(table,write,buffer,lenp,ppos, |
|
do_proc_dointvec_userhz_jiffies_conv,NULL); |
|
} |
|
|
|
/** |
|
* proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* @ppos: the current position in the file |
|
* |
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer |
|
* values from/to the user buffer, treated as an ASCII string. |
|
* The values read are assumed to be in 1/1000 seconds, and |
|
* are converted into jiffies. |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, void *buffer, |
|
size_t *lenp, loff_t *ppos) |
|
{ |
|
return do_proc_dointvec(table, write, buffer, lenp, ppos, |
|
do_proc_dointvec_ms_jiffies_conv, NULL); |
|
} |
|
|
|
static int proc_do_cad_pid(struct ctl_table *table, int write, void *buffer, |
|
size_t *lenp, loff_t *ppos) |
|
{ |
|
struct pid *new_pid; |
|
pid_t tmp; |
|
int r; |
|
|
|
tmp = pid_vnr(cad_pid); |
|
|
|
r = __do_proc_dointvec(&tmp, table, write, buffer, |
|
lenp, ppos, NULL, NULL); |
|
if (r || !write) |
|
return r; |
|
|
|
new_pid = find_get_pid(tmp); |
|
if (!new_pid) |
|
return -ESRCH; |
|
|
|
put_pid(xchg(&cad_pid, new_pid)); |
|
return 0; |
|
} |
|
|
|
/** |
|
* proc_do_large_bitmap - read/write from/to a large bitmap |
|
* @table: the sysctl table |
|
* @write: %TRUE if this is a write to the sysctl file |
|
* @buffer: the user buffer |
|
* @lenp: the size of the user buffer |
|
* @ppos: file position |
|
* |
|
* The bitmap is stored at table->data and the bitmap length (in bits) |
|
* in table->maxlen. |
|
* |
|
* We use a range comma separated format (e.g. 1,3-4,10-10) so that |
|
* large bitmaps may be represented in a compact manner. Writing into |
|
* the file will clear the bitmap then update it with the given input. |
|
* |
|
* Returns 0 on success. |
|
*/ |
|
int proc_do_large_bitmap(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
int err = 0; |
|
size_t left = *lenp; |
|
unsigned long bitmap_len = table->maxlen; |
|
unsigned long *bitmap = *(unsigned long **) table->data; |
|
unsigned long *tmp_bitmap = NULL; |
|
char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; |
|
|
|
if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
|
*lenp = 0; |
|
return 0; |
|
} |
|
|
|
if (write) { |
|
char *p = buffer; |
|
size_t skipped = 0; |
|
|
|
if (left > PAGE_SIZE - 1) { |
|
left = PAGE_SIZE - 1; |
|
/* How much of the buffer we'll skip this pass */ |
|
skipped = *lenp - left; |
|
} |
|
|
|
tmp_bitmap = bitmap_zalloc(bitmap_len, GFP_KERNEL); |
|
if (!tmp_bitmap) |
|
return -ENOMEM; |
|
proc_skip_char(&p, &left, '\n'); |
|
while (!err && left) { |
|
unsigned long val_a, val_b; |
|
bool neg; |
|
size_t saved_left; |
|
|
|
/* In case we stop parsing mid-number, we can reset */ |
|
saved_left = left; |
|
err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
|
sizeof(tr_a), &c); |
|
/* |
|
* If we consumed the entirety of a truncated buffer or |
|
* only one char is left (may be a "-"), then stop here, |
|
* reset, & come back for more. |
|
*/ |
|
if ((left <= 1) && skipped) { |
|
left = saved_left; |
|
break; |
|
} |
|
|
|
if (err) |
|
break; |
|
if (val_a >= bitmap_len || neg) { |
|
err = -EINVAL; |
|
break; |
|
} |
|
|
|
val_b = val_a; |
|
if (left) { |
|
p++; |
|
left--; |
|
} |
|
|
|
if (c == '-') { |
|
err = proc_get_long(&p, &left, &val_b, |
|
&neg, tr_b, sizeof(tr_b), |
|
&c); |
|
/* |
|
* If we consumed all of a truncated buffer or |
|
* then stop here, reset, & come back for more. |
|
*/ |
|
if (!left && skipped) { |
|
left = saved_left; |
|
break; |
|
} |
|
|
|
if (err) |
|
break; |
|
if (val_b >= bitmap_len || neg || |
|
val_a > val_b) { |
|
err = -EINVAL; |
|
break; |
|
} |
|
if (left) { |
|
p++; |
|
left--; |
|
} |
|
} |
|
|
|
bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
|
proc_skip_char(&p, &left, '\n'); |
|
} |
|
left += skipped; |
|
} else { |
|
unsigned long bit_a, bit_b = 0; |
|
bool first = 1; |
|
|
|
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) |
|
proc_put_char(&buffer, &left, ','); |
|
proc_put_long(&buffer, &left, bit_a, false); |
|
if (bit_a != bit_b) { |
|
proc_put_char(&buffer, &left, '-'); |
|
proc_put_long(&buffer, &left, bit_b, false); |
|
} |
|
|
|
first = 0; bit_b++; |
|
} |
|
proc_put_char(&buffer, &left, '\n'); |
|
} |
|
|
|
if (!err) { |
|
if (write) { |
|
if (*ppos) |
|
bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); |
|
else |
|
bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
|
} |
|
*lenp -= left; |
|
*ppos += *lenp; |
|
} |
|
|
|
bitmap_free(tmp_bitmap); |
|
return err; |
|
} |
|
|
|
#else /* CONFIG_PROC_SYSCTL */ |
|
|
|
int proc_dostring(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_dobool(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_dointvec(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_douintvec(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_dointvec_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_douintvec_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_dou8vec_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_dointvec_jiffies(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_doulongvec_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
int proc_do_large_bitmap(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
return -ENOSYS; |
|
} |
|
|
|
#endif /* CONFIG_PROC_SYSCTL */ |
|
|
|
#if defined(CONFIG_SYSCTL) |
|
int proc_do_static_key(struct ctl_table *table, int write, |
|
void *buffer, size_t *lenp, loff_t *ppos) |
|
{ |
|
struct static_key *key = (struct static_key *)table->data; |
|
static DEFINE_MUTEX(static_key_mutex); |
|
int val, ret; |
|
struct ctl_table tmp = { |
|
.data = &val, |
|
.maxlen = sizeof(val), |
|
.mode = table->mode, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}; |
|
|
|
if (write && !capable(CAP_SYS_ADMIN)) |
|
return -EPERM; |
|
|
|
mutex_lock(&static_key_mutex); |
|
val = static_key_enabled(key); |
|
ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); |
|
if (write && !ret) { |
|
if (val) |
|
static_key_enable(key); |
|
else |
|
static_key_disable(key); |
|
} |
|
mutex_unlock(&static_key_mutex); |
|
return ret; |
|
} |
|
|
|
static struct ctl_table kern_table[] = { |
|
{ |
|
.procname = "sched_child_runs_first", |
|
.data = &sysctl_sched_child_runs_first, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#ifdef CONFIG_SCHEDSTATS |
|
{ |
|
.procname = "sched_schedstats", |
|
.data = NULL, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = sysctl_schedstats, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif /* CONFIG_SCHEDSTATS */ |
|
#ifdef CONFIG_TASK_DELAY_ACCT |
|
{ |
|
.procname = "task_delayacct", |
|
.data = NULL, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = sysctl_delayacct, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif /* CONFIG_TASK_DELAY_ACCT */ |
|
#ifdef CONFIG_NUMA_BALANCING |
|
{ |
|
.procname = "numa_balancing", |
|
.data = NULL, /* filled in by handler */ |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = sysctl_numa_balancing, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif /* CONFIG_NUMA_BALANCING */ |
|
{ |
|
.procname = "sched_rt_period_us", |
|
.data = &sysctl_sched_rt_period, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = sched_rt_handler, |
|
}, |
|
{ |
|
.procname = "sched_rt_runtime_us", |
|
.data = &sysctl_sched_rt_runtime, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = sched_rt_handler, |
|
}, |
|
{ |
|
.procname = "sched_deadline_period_max_us", |
|
.data = &sysctl_sched_dl_period_max, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "sched_deadline_period_min_us", |
|
.data = &sysctl_sched_dl_period_min, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "sched_rr_timeslice_ms", |
|
.data = &sysctl_sched_rr_timeslice, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = sched_rr_handler, |
|
}, |
|
#ifdef CONFIG_UCLAMP_TASK |
|
{ |
|
.procname = "sched_util_clamp_min", |
|
.data = &sysctl_sched_uclamp_util_min, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = sysctl_sched_uclamp_handler, |
|
}, |
|
{ |
|
.procname = "sched_util_clamp_max", |
|
.data = &sysctl_sched_uclamp_util_max, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = sysctl_sched_uclamp_handler, |
|
}, |
|
{ |
|
.procname = "sched_util_clamp_min_rt_default", |
|
.data = &sysctl_sched_uclamp_util_min_rt_default, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = sysctl_sched_uclamp_handler, |
|
}, |
|
#endif |
|
#ifdef CONFIG_SCHED_AUTOGROUP |
|
{ |
|
.procname = "sched_autogroup_enabled", |
|
.data = &sysctl_sched_autogroup_enabled, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
#ifdef CONFIG_CFS_BANDWIDTH |
|
{ |
|
.procname = "sched_cfs_bandwidth_slice_us", |
|
.data = &sysctl_sched_cfs_bandwidth_slice, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) |
|
{ |
|
.procname = "sched_energy_aware", |
|
.data = &sysctl_sched_energy_aware, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = sched_energy_aware_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
#ifdef CONFIG_PROVE_LOCKING |
|
{ |
|
.procname = "prove_locking", |
|
.data = &prove_locking, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_LOCK_STAT |
|
{ |
|
.procname = "lock_stat", |
|
.data = &lock_stat, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
{ |
|
.procname = "panic", |
|
.data = &panic_timeout, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#ifdef CONFIG_COREDUMP |
|
{ |
|
.procname = "core_uses_pid", |
|
.data = &core_uses_pid, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "core_pattern", |
|
.data = core_pattern, |
|
.maxlen = CORENAME_MAX_SIZE, |
|
.mode = 0644, |
|
.proc_handler = proc_dostring_coredump, |
|
}, |
|
{ |
|
.procname = "core_pipe_limit", |
|
.data = &core_pipe_limit, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_PROC_SYSCTL |
|
{ |
|
.procname = "tainted", |
|
.maxlen = sizeof(long), |
|
.mode = 0644, |
|
.proc_handler = proc_taint, |
|
}, |
|
{ |
|
.procname = "sysctl_writes_strict", |
|
.data = &sysctl_writes_strict, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = &neg_one, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
#ifdef CONFIG_LATENCYTOP |
|
{ |
|
.procname = "latencytop", |
|
.data = &latencytop_enabled, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = sysctl_latencytop, |
|
}, |
|
#endif |
|
#ifdef CONFIG_BLK_DEV_INITRD |
|
{ |
|
.procname = "real-root-dev", |
|
.data = &real_root_dev, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
{ |
|
.procname = "print-fatal-signals", |
|
.data = &print_fatal_signals, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#ifdef CONFIG_SPARC |
|
{ |
|
.procname = "reboot-cmd", |
|
.data = reboot_command, |
|
.maxlen = 256, |
|
.mode = 0644, |
|
.proc_handler = proc_dostring, |
|
}, |
|
{ |
|
.procname = "stop-a", |
|
.data = &stop_a_enabled, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "scons-poweroff", |
|
.data = &scons_pwroff, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_SPARC64 |
|
{ |
|
.procname = "tsb-ratio", |
|
.data = &sysctl_tsb_ratio, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_PARISC |
|
{ |
|
.procname = "soft-power", |
|
.data = &pwrsw_enabled, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW |
|
{ |
|
.procname = "unaligned-trap", |
|
.data = &unaligned_enabled, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
{ |
|
.procname = "ctrl-alt-del", |
|
.data = &C_A_D, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#ifdef CONFIG_FUNCTION_TRACER |
|
{ |
|
.procname = "ftrace_enabled", |
|
.data = &ftrace_enabled, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = ftrace_enable_sysctl, |
|
}, |
|
#endif |
|
#ifdef CONFIG_STACK_TRACER |
|
{ |
|
.procname = "stack_tracer_enabled", |
|
.data = &stack_tracer_enabled, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = stack_trace_sysctl, |
|
}, |
|
#endif |
|
#ifdef CONFIG_TRACING |
|
{ |
|
.procname = "ftrace_dump_on_oops", |
|
.data = &ftrace_dump_on_oops, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "traceoff_on_warning", |
|
.data = &__disable_trace_on_warning, |
|
.maxlen = sizeof(__disable_trace_on_warning), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "tracepoint_printk", |
|
.data = &tracepoint_printk, |
|
.maxlen = sizeof(tracepoint_printk), |
|
.mode = 0644, |
|
.proc_handler = tracepoint_printk_sysctl, |
|
}, |
|
#endif |
|
#ifdef CONFIG_KEXEC_CORE |
|
{ |
|
.procname = "kexec_load_disabled", |
|
.data = &kexec_load_disabled, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
/* only handle a transition from default "0" to "1" */ |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ONE, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
#ifdef CONFIG_MODULES |
|
{ |
|
.procname = "modprobe", |
|
.data = &modprobe_path, |
|
.maxlen = KMOD_PATH_LEN, |
|
.mode = 0644, |
|
.proc_handler = proc_dostring, |
|
}, |
|
{ |
|
.procname = "modules_disabled", |
|
.data = &modules_disabled, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
/* only handle a transition from default "0" to "1" */ |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ONE, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
#ifdef CONFIG_UEVENT_HELPER |
|
{ |
|
.procname = "hotplug", |
|
.data = &uevent_helper, |
|
.maxlen = UEVENT_HELPER_PATH_LEN, |
|
.mode = 0644, |
|
.proc_handler = proc_dostring, |
|
}, |
|
#endif |
|
#ifdef CONFIG_CHR_DEV_SG |
|
{ |
|
.procname = "sg-big-buff", |
|
.data = &sg_big_buff, |
|
.maxlen = sizeof (int), |
|
.mode = 0444, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_BSD_PROCESS_ACCT |
|
{ |
|
.procname = "acct", |
|
.data = &acct_parm, |
|
.maxlen = 3*sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_MAGIC_SYSRQ |
|
{ |
|
.procname = "sysrq", |
|
.data = NULL, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = sysrq_sysctl_handler, |
|
}, |
|
#endif |
|
#ifdef CONFIG_PROC_SYSCTL |
|
{ |
|
.procname = "cad_pid", |
|
.data = NULL, |
|
.maxlen = sizeof (int), |
|
.mode = 0600, |
|
.proc_handler = proc_do_cad_pid, |
|
}, |
|
#endif |
|
{ |
|
.procname = "threads-max", |
|
.data = NULL, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = sysctl_max_threads, |
|
}, |
|
{ |
|
.procname = "random", |
|
.mode = 0555, |
|
.child = random_table, |
|
}, |
|
{ |
|
.procname = "usermodehelper", |
|
.mode = 0555, |
|
.child = usermodehelper_table, |
|
}, |
|
#ifdef CONFIG_FW_LOADER_USER_HELPER |
|
{ |
|
.procname = "firmware_config", |
|
.mode = 0555, |
|
.child = firmware_config_table, |
|
}, |
|
#endif |
|
{ |
|
.procname = "overflowuid", |
|
.data = &overflowuid, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = &minolduid, |
|
.extra2 = &maxolduid, |
|
}, |
|
{ |
|
.procname = "overflowgid", |
|
.data = &overflowgid, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = &minolduid, |
|
.extra2 = &maxolduid, |
|
}, |
|
#ifdef CONFIG_S390 |
|
{ |
|
.procname = "userprocess_debug", |
|
.data = &show_unhandled_signals, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_SMP |
|
{ |
|
.procname = "oops_all_cpu_backtrace", |
|
.data = &sysctl_oops_all_cpu_backtrace, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif /* CONFIG_SMP */ |
|
{ |
|
.procname = "pid_max", |
|
.data = &pid_max, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = &pid_max_min, |
|
.extra2 = &pid_max_max, |
|
}, |
|
{ |
|
.procname = "panic_on_oops", |
|
.data = &panic_on_oops, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "panic_print", |
|
.data = &panic_print, |
|
.maxlen = sizeof(unsigned long), |
|
.mode = 0644, |
|
.proc_handler = proc_doulongvec_minmax, |
|
}, |
|
#if defined CONFIG_PRINTK |
|
{ |
|
.procname = "printk", |
|
.data = &console_loglevel, |
|
.maxlen = 4*sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "printk_ratelimit", |
|
.data = &printk_ratelimit_state.interval, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_jiffies, |
|
}, |
|
{ |
|
.procname = "printk_ratelimit_burst", |
|
.data = &printk_ratelimit_state.burst, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "printk_delay", |
|
.data = &printk_delay_msec, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &ten_thousand, |
|
}, |
|
{ |
|
.procname = "printk_devkmsg", |
|
.data = devkmsg_log_str, |
|
.maxlen = DEVKMSG_STR_MAX_SIZE, |
|
.mode = 0644, |
|
.proc_handler = devkmsg_sysctl_set_loglvl, |
|
}, |
|
{ |
|
.procname = "dmesg_restrict", |
|
.data = &dmesg_restrict, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax_sysadmin, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
{ |
|
.procname = "kptr_restrict", |
|
.data = &kptr_restrict, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax_sysadmin, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &two, |
|
}, |
|
#endif |
|
{ |
|
.procname = "ngroups_max", |
|
.data = &ngroups_max, |
|
.maxlen = sizeof (int), |
|
.mode = 0444, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "cap_last_cap", |
|
.data = (void *)&cap_last_cap, |
|
.maxlen = sizeof(int), |
|
.mode = 0444, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#if defined(CONFIG_LOCKUP_DETECTOR) |
|
{ |
|
.procname = "watchdog", |
|
.data = &watchdog_user_enabled, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_watchdog, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
{ |
|
.procname = "watchdog_thresh", |
|
.data = &watchdog_thresh, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_watchdog_thresh, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &sixty, |
|
}, |
|
{ |
|
.procname = "nmi_watchdog", |
|
.data = &nmi_watchdog_user_enabled, |
|
.maxlen = sizeof(int), |
|
.mode = NMI_WATCHDOG_SYSCTL_PERM, |
|
.proc_handler = proc_nmi_watchdog, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
{ |
|
.procname = "watchdog_cpumask", |
|
.data = &watchdog_cpumask_bits, |
|
.maxlen = NR_CPUS, |
|
.mode = 0644, |
|
.proc_handler = proc_watchdog_cpumask, |
|
}, |
|
#ifdef CONFIG_SOFTLOCKUP_DETECTOR |
|
{ |
|
.procname = "soft_watchdog", |
|
.data = &soft_watchdog_user_enabled, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_soft_watchdog, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
{ |
|
.procname = "softlockup_panic", |
|
.data = &softlockup_panic, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#ifdef CONFIG_SMP |
|
{ |
|
.procname = "softlockup_all_cpu_backtrace", |
|
.data = &sysctl_softlockup_all_cpu_backtrace, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif /* CONFIG_SMP */ |
|
#endif |
|
#ifdef CONFIG_HARDLOCKUP_DETECTOR |
|
{ |
|
.procname = "hardlockup_panic", |
|
.data = &hardlockup_panic, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#ifdef CONFIG_SMP |
|
{ |
|
.procname = "hardlockup_all_cpu_backtrace", |
|
.data = &sysctl_hardlockup_all_cpu_backtrace, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif /* CONFIG_SMP */ |
|
#endif |
|
#endif |
|
|
|
#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) |
|
{ |
|
.procname = "unknown_nmi_panic", |
|
.data = &unknown_nmi_panic, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
|
|
#if (defined(CONFIG_X86_32) || defined(CONFIG_PARISC)) && \ |
|
defined(CONFIG_DEBUG_STACKOVERFLOW) |
|
{ |
|
.procname = "panic_on_stackoverflow", |
|
.data = &sysctl_panic_on_stackoverflow, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#if defined(CONFIG_X86) |
|
{ |
|
.procname = "panic_on_unrecovered_nmi", |
|
.data = &panic_on_unrecovered_nmi, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "panic_on_io_nmi", |
|
.data = &panic_on_io_nmi, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "bootloader_type", |
|
.data = &bootloader_type, |
|
.maxlen = sizeof (int), |
|
.mode = 0444, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "bootloader_version", |
|
.data = &bootloader_version, |
|
.maxlen = sizeof (int), |
|
.mode = 0444, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "io_delay_type", |
|
.data = &io_delay_type, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#if defined(CONFIG_MMU) |
|
{ |
|
.procname = "randomize_va_space", |
|
.data = &randomize_va_space, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#if defined(CONFIG_S390) && defined(CONFIG_SMP) |
|
{ |
|
.procname = "spin_retry", |
|
.data = &spin_retry, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
|
{ |
|
.procname = "acpi_video_flags", |
|
.data = &acpi_realmode_flags, |
|
.maxlen = sizeof (unsigned long), |
|
.mode = 0644, |
|
.proc_handler = proc_doulongvec_minmax, |
|
}, |
|
#endif |
|
#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
|
{ |
|
.procname = "ignore-unaligned-usertrap", |
|
.data = &no_unaligned_warning, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_IA64 |
|
{ |
|
.procname = "unaligned-dump-stack", |
|
.data = &unaligned_dump_stack, |
|
.maxlen = sizeof (int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_DETECT_HUNG_TASK |
|
#ifdef CONFIG_SMP |
|
{ |
|
.procname = "hung_task_all_cpu_backtrace", |
|
.data = &sysctl_hung_task_all_cpu_backtrace, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif /* CONFIG_SMP */ |
|
{ |
|
.procname = "hung_task_panic", |
|
.data = &sysctl_hung_task_panic, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
{ |
|
.procname = "hung_task_check_count", |
|
.data = &sysctl_hung_task_check_count, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
{ |
|
.procname = "hung_task_timeout_secs", |
|
.data = &sysctl_hung_task_timeout_secs, |
|
.maxlen = sizeof(unsigned long), |
|
.mode = 0644, |
|
.proc_handler = proc_dohung_task_timeout_secs, |
|
.extra2 = &hung_task_timeout_max, |
|
}, |
|
{ |
|
.procname = "hung_task_check_interval_secs", |
|
.data = &sysctl_hung_task_check_interval_secs, |
|
.maxlen = sizeof(unsigned long), |
|
.mode = 0644, |
|
.proc_handler = proc_dohung_task_timeout_secs, |
|
.extra2 = &hung_task_timeout_max, |
|
}, |
|
{ |
|
.procname = "hung_task_warnings", |
|
.data = &sysctl_hung_task_warnings, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = &neg_one, |
|
}, |
|
#endif |
|
#ifdef CONFIG_RT_MUTEXES |
|
{ |
|
.procname = "max_lock_depth", |
|
.data = &max_lock_depth, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
{ |
|
.procname = "poweroff_cmd", |
|
.data = &poweroff_cmd, |
|
.maxlen = POWEROFF_CMD_PATH_LEN, |
|
.mode = 0644, |
|
.proc_handler = proc_dostring, |
|
}, |
|
#ifdef CONFIG_KEYS |
|
{ |
|
.procname = "keys", |
|
.mode = 0555, |
|
.child = key_sysctls, |
|
}, |
|
#endif |
|
#ifdef CONFIG_PERF_EVENTS |
|
/* |
|
* User-space scripts rely on the existence of this file |
|
* as a feature check for perf_events being enabled. |
|
* |
|
* So it's an ABI, do not remove! |
|
*/ |
|
{ |
|
.procname = "perf_event_paranoid", |
|
.data = &sysctl_perf_event_paranoid, |
|
.maxlen = sizeof(sysctl_perf_event_paranoid), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "perf_event_mlock_kb", |
|
.data = &sysctl_perf_event_mlock, |
|
.maxlen = sizeof(sysctl_perf_event_mlock), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "perf_event_max_sample_rate", |
|
.data = &sysctl_perf_event_sample_rate, |
|
.maxlen = sizeof(sysctl_perf_event_sample_rate), |
|
.mode = 0644, |
|
.proc_handler = perf_proc_update_handler, |
|
.extra1 = SYSCTL_ONE, |
|
}, |
|
{ |
|
.procname = "perf_cpu_time_max_percent", |
|
.data = &sysctl_perf_cpu_time_max_percent, |
|
.maxlen = sizeof(sysctl_perf_cpu_time_max_percent), |
|
.mode = 0644, |
|
.proc_handler = perf_cpu_time_max_percent_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &one_hundred, |
|
}, |
|
{ |
|
.procname = "perf_event_max_stack", |
|
.data = &sysctl_perf_event_max_stack, |
|
.maxlen = sizeof(sysctl_perf_event_max_stack), |
|
.mode = 0644, |
|
.proc_handler = perf_event_max_stack_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &six_hundred_forty_kb, |
|
}, |
|
{ |
|
.procname = "perf_event_max_contexts_per_stack", |
|
.data = &sysctl_perf_event_max_contexts_per_stack, |
|
.maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), |
|
.mode = 0644, |
|
.proc_handler = perf_event_max_stack_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &one_thousand, |
|
}, |
|
#endif |
|
{ |
|
.procname = "panic_on_warn", |
|
.data = &panic_on_warn, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
|
{ |
|
.procname = "timer_migration", |
|
.data = &sysctl_timer_migration, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = timer_migration_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
#ifdef CONFIG_BPF_SYSCALL |
|
{ |
|
.procname = "unprivileged_bpf_disabled", |
|
.data = &sysctl_unprivileged_bpf_disabled, |
|
.maxlen = sizeof(sysctl_unprivileged_bpf_disabled), |
|
.mode = 0644, |
|
.proc_handler = bpf_unpriv_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &two, |
|
}, |
|
{ |
|
.procname = "bpf_stats_enabled", |
|
.data = &bpf_stats_enabled_key.key, |
|
.maxlen = sizeof(bpf_stats_enabled_key), |
|
.mode = 0644, |
|
.proc_handler = bpf_stats_handler, |
|
}, |
|
#endif |
|
#if defined(CONFIG_TREE_RCU) |
|
{ |
|
.procname = "panic_on_rcu_stall", |
|
.data = &sysctl_panic_on_rcu_stall, |
|
.maxlen = sizeof(sysctl_panic_on_rcu_stall), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
#if defined(CONFIG_TREE_RCU) |
|
{ |
|
.procname = "max_rcu_stall_to_panic", |
|
.data = &sysctl_max_rcu_stall_to_panic, |
|
.maxlen = sizeof(sysctl_max_rcu_stall_to_panic), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ONE, |
|
.extra2 = SYSCTL_INT_MAX, |
|
}, |
|
#endif |
|
#ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE |
|
{ |
|
.procname = "stack_erasing", |
|
.data = NULL, |
|
.maxlen = sizeof(int), |
|
.mode = 0600, |
|
.proc_handler = stack_erasing_sysctl, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
{ } |
|
}; |
|
|
|
static struct ctl_table vm_table[] = { |
|
{ |
|
.procname = "overcommit_memory", |
|
.data = &sysctl_overcommit_memory, |
|
.maxlen = sizeof(sysctl_overcommit_memory), |
|
.mode = 0644, |
|
.proc_handler = overcommit_policy_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &two, |
|
}, |
|
{ |
|
.procname = "panic_on_oom", |
|
.data = &sysctl_panic_on_oom, |
|
.maxlen = sizeof(sysctl_panic_on_oom), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &two, |
|
}, |
|
{ |
|
.procname = "oom_kill_allocating_task", |
|
.data = &sysctl_oom_kill_allocating_task, |
|
.maxlen = sizeof(sysctl_oom_kill_allocating_task), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "oom_dump_tasks", |
|
.data = &sysctl_oom_dump_tasks, |
|
.maxlen = sizeof(sysctl_oom_dump_tasks), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "overcommit_ratio", |
|
.data = &sysctl_overcommit_ratio, |
|
.maxlen = sizeof(sysctl_overcommit_ratio), |
|
.mode = 0644, |
|
.proc_handler = overcommit_ratio_handler, |
|
}, |
|
{ |
|
.procname = "overcommit_kbytes", |
|
.data = &sysctl_overcommit_kbytes, |
|
.maxlen = sizeof(sysctl_overcommit_kbytes), |
|
.mode = 0644, |
|
.proc_handler = overcommit_kbytes_handler, |
|
}, |
|
{ |
|
.procname = "page-cluster", |
|
.data = &page_cluster, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
{ |
|
.procname = "dirty_background_ratio", |
|
.data = &dirty_background_ratio, |
|
.maxlen = sizeof(dirty_background_ratio), |
|
.mode = 0644, |
|
.proc_handler = dirty_background_ratio_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &one_hundred, |
|
}, |
|
{ |
|
.procname = "dirty_background_bytes", |
|
.data = &dirty_background_bytes, |
|
.maxlen = sizeof(dirty_background_bytes), |
|
.mode = 0644, |
|
.proc_handler = dirty_background_bytes_handler, |
|
.extra1 = &one_ul, |
|
}, |
|
{ |
|
.procname = "dirty_ratio", |
|
.data = &vm_dirty_ratio, |
|
.maxlen = sizeof(vm_dirty_ratio), |
|
.mode = 0644, |
|
.proc_handler = dirty_ratio_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &one_hundred, |
|
}, |
|
{ |
|
.procname = "dirty_bytes", |
|
.data = &vm_dirty_bytes, |
|
.maxlen = sizeof(vm_dirty_bytes), |
|
.mode = 0644, |
|
.proc_handler = dirty_bytes_handler, |
|
.extra1 = &dirty_bytes_min, |
|
}, |
|
{ |
|
.procname = "dirty_writeback_centisecs", |
|
.data = &dirty_writeback_interval, |
|
.maxlen = sizeof(dirty_writeback_interval), |
|
.mode = 0644, |
|
.proc_handler = dirty_writeback_centisecs_handler, |
|
}, |
|
{ |
|
.procname = "dirty_expire_centisecs", |
|
.data = &dirty_expire_interval, |
|
.maxlen = sizeof(dirty_expire_interval), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
{ |
|
.procname = "dirtytime_expire_seconds", |
|
.data = &dirtytime_expire_interval, |
|
.maxlen = sizeof(dirtytime_expire_interval), |
|
.mode = 0644, |
|
.proc_handler = dirtytime_interval_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
{ |
|
.procname = "swappiness", |
|
.data = &vm_swappiness, |
|
.maxlen = sizeof(vm_swappiness), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &two_hundred, |
|
}, |
|
#ifdef CONFIG_HUGETLB_PAGE |
|
{ |
|
.procname = "nr_hugepages", |
|
.data = NULL, |
|
.maxlen = sizeof(unsigned long), |
|
.mode = 0644, |
|
.proc_handler = hugetlb_sysctl_handler, |
|
}, |
|
#ifdef CONFIG_NUMA |
|
{ |
|
.procname = "nr_hugepages_mempolicy", |
|
.data = NULL, |
|
.maxlen = sizeof(unsigned long), |
|
.mode = 0644, |
|
.proc_handler = &hugetlb_mempolicy_sysctl_handler, |
|
}, |
|
{ |
|
.procname = "numa_stat", |
|
.data = &sysctl_vm_numa_stat, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = sysctl_vm_numa_stat_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
{ |
|
.procname = "hugetlb_shm_group", |
|
.data = &sysctl_hugetlb_shm_group, |
|
.maxlen = sizeof(gid_t), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
{ |
|
.procname = "nr_overcommit_hugepages", |
|
.data = NULL, |
|
.maxlen = sizeof(unsigned long), |
|
.mode = 0644, |
|
.proc_handler = hugetlb_overcommit_handler, |
|
}, |
|
#endif |
|
{ |
|
.procname = "lowmem_reserve_ratio", |
|
.data = &sysctl_lowmem_reserve_ratio, |
|
.maxlen = sizeof(sysctl_lowmem_reserve_ratio), |
|
.mode = 0644, |
|
.proc_handler = lowmem_reserve_ratio_sysctl_handler, |
|
}, |
|
{ |
|
.procname = "drop_caches", |
|
.data = &sysctl_drop_caches, |
|
.maxlen = sizeof(int), |
|
.mode = 0200, |
|
.proc_handler = drop_caches_sysctl_handler, |
|
.extra1 = SYSCTL_ONE, |
|
.extra2 = &four, |
|
}, |
|
#ifdef CONFIG_COMPACTION |
|
{ |
|
.procname = "compact_memory", |
|
.data = NULL, |
|
.maxlen = sizeof(int), |
|
.mode = 0200, |
|
.proc_handler = sysctl_compaction_handler, |
|
}, |
|
{ |
|
.procname = "compaction_proactiveness", |
|
.data = &sysctl_compaction_proactiveness, |
|
.maxlen = sizeof(sysctl_compaction_proactiveness), |
|
.mode = 0644, |
|
.proc_handler = compaction_proactiveness_sysctl_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &one_hundred, |
|
}, |
|
{ |
|
.procname = "extfrag_threshold", |
|
.data = &sysctl_extfrag_threshold, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = &min_extfrag_threshold, |
|
.extra2 = &max_extfrag_threshold, |
|
}, |
|
{ |
|
.procname = "compact_unevictable_allowed", |
|
.data = &sysctl_compact_unevictable_allowed, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax_warn_RT_change, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
|
|
#endif /* CONFIG_COMPACTION */ |
|
{ |
|
.procname = "min_free_kbytes", |
|
.data = &min_free_kbytes, |
|
.maxlen = sizeof(min_free_kbytes), |
|
.mode = 0644, |
|
.proc_handler = min_free_kbytes_sysctl_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
{ |
|
.procname = "watermark_boost_factor", |
|
.data = &watermark_boost_factor, |
|
.maxlen = sizeof(watermark_boost_factor), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
{ |
|
.procname = "watermark_scale_factor", |
|
.data = &watermark_scale_factor, |
|
.maxlen = sizeof(watermark_scale_factor), |
|
.mode = 0644, |
|
.proc_handler = watermark_scale_factor_sysctl_handler, |
|
.extra1 = SYSCTL_ONE, |
|
.extra2 = &one_thousand, |
|
}, |
|
{ |
|
.procname = "percpu_pagelist_high_fraction", |
|
.data = &percpu_pagelist_high_fraction, |
|
.maxlen = sizeof(percpu_pagelist_high_fraction), |
|
.mode = 0644, |
|
.proc_handler = percpu_pagelist_high_fraction_sysctl_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
{ |
|
.procname = "page_lock_unfairness", |
|
.data = &sysctl_page_lock_unfairness, |
|
.maxlen = sizeof(sysctl_page_lock_unfairness), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
#ifdef CONFIG_MMU |
|
{ |
|
.procname = "max_map_count", |
|
.data = &sysctl_max_map_count, |
|
.maxlen = sizeof(sysctl_max_map_count), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
#else |
|
{ |
|
.procname = "nr_trim_pages", |
|
.data = &sysctl_nr_trim_pages, |
|
.maxlen = sizeof(sysctl_nr_trim_pages), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
#endif |
|
{ |
|
.procname = "laptop_mode", |
|
.data = &laptop_mode, |
|
.maxlen = sizeof(laptop_mode), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_jiffies, |
|
}, |
|
{ |
|
.procname = "vfs_cache_pressure", |
|
.data = &sysctl_vfs_cache_pressure, |
|
.maxlen = sizeof(sysctl_vfs_cache_pressure), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
#if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \ |
|
defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT) |
|
{ |
|
.procname = "legacy_va_layout", |
|
.data = &sysctl_legacy_va_layout, |
|
.maxlen = sizeof(sysctl_legacy_va_layout), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
#endif |
|
#ifdef CONFIG_NUMA |
|
{ |
|
.procname = "zone_reclaim_mode", |
|
.data = &node_reclaim_mode, |
|
.maxlen = sizeof(node_reclaim_mode), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
{ |
|
.procname = "min_unmapped_ratio", |
|
.data = &sysctl_min_unmapped_ratio, |
|
.maxlen = sizeof(sysctl_min_unmapped_ratio), |
|
.mode = 0644, |
|
.proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &one_hundred, |
|
}, |
|
{ |
|
.procname = "min_slab_ratio", |
|
.data = &sysctl_min_slab_ratio, |
|
.maxlen = sizeof(sysctl_min_slab_ratio), |
|
.mode = 0644, |
|
.proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &one_hundred, |
|
}, |
|
#endif |
|
#ifdef CONFIG_SMP |
|
{ |
|
.procname = "stat_interval", |
|
.data = &sysctl_stat_interval, |
|
.maxlen = sizeof(sysctl_stat_interval), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_jiffies, |
|
}, |
|
{ |
|
.procname = "stat_refresh", |
|
.data = NULL, |
|
.maxlen = 0, |
|
.mode = 0600, |
|
.proc_handler = vmstat_refresh, |
|
}, |
|
#endif |
|
#ifdef CONFIG_MMU |
|
{ |
|
.procname = "mmap_min_addr", |
|
.data = &dac_mmap_min_addr, |
|
.maxlen = sizeof(unsigned long), |
|
.mode = 0644, |
|
.proc_handler = mmap_min_addr_handler, |
|
}, |
|
#endif |
|
#ifdef CONFIG_NUMA |
|
{ |
|
.procname = "numa_zonelist_order", |
|
.data = &numa_zonelist_order, |
|
.maxlen = NUMA_ZONELIST_ORDER_LEN, |
|
.mode = 0644, |
|
.proc_handler = numa_zonelist_order_handler, |
|
}, |
|
#endif |
|
#if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
|
(defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
|
{ |
|
.procname = "vdso_enabled", |
|
#ifdef CONFIG_X86_32 |
|
.data = &vdso32_enabled, |
|
.maxlen = sizeof(vdso32_enabled), |
|
#else |
|
.data = &vdso_enabled, |
|
.maxlen = sizeof(vdso_enabled), |
|
#endif |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
.extra1 = SYSCTL_ZERO, |
|
}, |
|
#endif |
|
#ifdef CONFIG_HIGHMEM |
|
{ |
|
.procname = "highmem_is_dirtyable", |
|
.data = &vm_highmem_is_dirtyable, |
|
.maxlen = sizeof(vm_highmem_is_dirtyable), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
#ifdef CONFIG_MEMORY_FAILURE |
|
{ |
|
.procname = "memory_failure_early_kill", |
|
.data = &sysctl_memory_failure_early_kill, |
|
.maxlen = sizeof(sysctl_memory_failure_early_kill), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
{ |
|
.procname = "memory_failure_recovery", |
|
.data = &sysctl_memory_failure_recovery, |
|
.maxlen = sizeof(sysctl_memory_failure_recovery), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
{ |
|
.procname = "user_reserve_kbytes", |
|
.data = &sysctl_user_reserve_kbytes, |
|
.maxlen = sizeof(sysctl_user_reserve_kbytes), |
|
.mode = 0644, |
|
.proc_handler = proc_doulongvec_minmax, |
|
}, |
|
{ |
|
.procname = "admin_reserve_kbytes", |
|
.data = &sysctl_admin_reserve_kbytes, |
|
.maxlen = sizeof(sysctl_admin_reserve_kbytes), |
|
.mode = 0644, |
|
.proc_handler = proc_doulongvec_minmax, |
|
}, |
|
#ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
|
{ |
|
.procname = "mmap_rnd_bits", |
|
.data = &mmap_rnd_bits, |
|
.maxlen = sizeof(mmap_rnd_bits), |
|
.mode = 0600, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = (void *)&mmap_rnd_bits_min, |
|
.extra2 = (void *)&mmap_rnd_bits_max, |
|
}, |
|
#endif |
|
#ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS |
|
{ |
|
.procname = "mmap_rnd_compat_bits", |
|
.data = &mmap_rnd_compat_bits, |
|
.maxlen = sizeof(mmap_rnd_compat_bits), |
|
.mode = 0600, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = (void *)&mmap_rnd_compat_bits_min, |
|
.extra2 = (void *)&mmap_rnd_compat_bits_max, |
|
}, |
|
#endif |
|
#ifdef CONFIG_USERFAULTFD |
|
{ |
|
.procname = "unprivileged_userfaultfd", |
|
.data = &sysctl_unprivileged_userfaultfd, |
|
.maxlen = sizeof(sysctl_unprivileged_userfaultfd), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
{ } |
|
}; |
|
|
|
static struct ctl_table fs_table[] = { |
|
{ |
|
.procname = "inode-nr", |
|
.data = &inodes_stat, |
|
.maxlen = 2*sizeof(long), |
|
.mode = 0444, |
|
.proc_handler = proc_nr_inodes, |
|
}, |
|
{ |
|
.procname = "inode-state", |
|
.data = &inodes_stat, |
|
.maxlen = 7*sizeof(long), |
|
.mode = 0444, |
|
.proc_handler = proc_nr_inodes, |
|
}, |
|
{ |
|
.procname = "file-nr", |
|
.data = &files_stat, |
|
.maxlen = sizeof(files_stat), |
|
.mode = 0444, |
|
.proc_handler = proc_nr_files, |
|
}, |
|
{ |
|
.procname = "file-max", |
|
.data = &files_stat.max_files, |
|
.maxlen = sizeof(files_stat.max_files), |
|
.mode = 0644, |
|
.proc_handler = proc_doulongvec_minmax, |
|
.extra1 = &zero_ul, |
|
.extra2 = &long_max, |
|
}, |
|
{ |
|
.procname = "nr_open", |
|
.data = &sysctl_nr_open, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = &sysctl_nr_open_min, |
|
.extra2 = &sysctl_nr_open_max, |
|
}, |
|
{ |
|
.procname = "dentry-state", |
|
.data = &dentry_stat, |
|
.maxlen = 6*sizeof(long), |
|
.mode = 0444, |
|
.proc_handler = proc_nr_dentry, |
|
}, |
|
{ |
|
.procname = "overflowuid", |
|
.data = &fs_overflowuid, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = &minolduid, |
|
.extra2 = &maxolduid, |
|
}, |
|
{ |
|
.procname = "overflowgid", |
|
.data = &fs_overflowgid, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = &minolduid, |
|
.extra2 = &maxolduid, |
|
}, |
|
#ifdef CONFIG_FILE_LOCKING |
|
{ |
|
.procname = "leases-enable", |
|
.data = &leases_enable, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_DNOTIFY |
|
{ |
|
.procname = "dir-notify-enable", |
|
.data = &dir_notify_enable, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_MMU |
|
#ifdef CONFIG_FILE_LOCKING |
|
{ |
|
.procname = "lease-break-time", |
|
.data = &lease_break_time, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec, |
|
}, |
|
#endif |
|
#ifdef CONFIG_AIO |
|
{ |
|
.procname = "aio-nr", |
|
.data = &aio_nr, |
|
.maxlen = sizeof(aio_nr), |
|
.mode = 0444, |
|
.proc_handler = proc_doulongvec_minmax, |
|
}, |
|
{ |
|
.procname = "aio-max-nr", |
|
.data = &aio_max_nr, |
|
.maxlen = sizeof(aio_max_nr), |
|
.mode = 0644, |
|
.proc_handler = proc_doulongvec_minmax, |
|
}, |
|
#endif /* CONFIG_AIO */ |
|
#ifdef CONFIG_INOTIFY_USER |
|
{ |
|
.procname = "inotify", |
|
.mode = 0555, |
|
.child = inotify_table, |
|
}, |
|
#endif |
|
#ifdef CONFIG_FANOTIFY |
|
{ |
|
.procname = "fanotify", |
|
.mode = 0555, |
|
.child = fanotify_table, |
|
}, |
|
#endif |
|
#ifdef CONFIG_EPOLL |
|
{ |
|
.procname = "epoll", |
|
.mode = 0555, |
|
.child = epoll_table, |
|
}, |
|
#endif |
|
#endif |
|
{ |
|
.procname = "protected_symlinks", |
|
.data = &sysctl_protected_symlinks, |
|
.maxlen = sizeof(int), |
|
.mode = 0600, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
{ |
|
.procname = "protected_hardlinks", |
|
.data = &sysctl_protected_hardlinks, |
|
.maxlen = sizeof(int), |
|
.mode = 0600, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
{ |
|
.procname = "protected_fifos", |
|
.data = &sysctl_protected_fifos, |
|
.maxlen = sizeof(int), |
|
.mode = 0600, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &two, |
|
}, |
|
{ |
|
.procname = "protected_regular", |
|
.data = &sysctl_protected_regular, |
|
.maxlen = sizeof(int), |
|
.mode = 0600, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &two, |
|
}, |
|
{ |
|
.procname = "suid_dumpable", |
|
.data = &suid_dumpable, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax_coredump, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = &two, |
|
}, |
|
#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
|
{ |
|
.procname = "binfmt_misc", |
|
.mode = 0555, |
|
.child = sysctl_mount_point, |
|
}, |
|
#endif |
|
{ |
|
.procname = "pipe-max-size", |
|
.data = &pipe_max_size, |
|
.maxlen = sizeof(pipe_max_size), |
|
.mode = 0644, |
|
.proc_handler = proc_dopipe_max_size, |
|
}, |
|
{ |
|
.procname = "pipe-user-pages-hard", |
|
.data = &pipe_user_pages_hard, |
|
.maxlen = sizeof(pipe_user_pages_hard), |
|
.mode = 0644, |
|
.proc_handler = proc_doulongvec_minmax, |
|
}, |
|
{ |
|
.procname = "pipe-user-pages-soft", |
|
.data = &pipe_user_pages_soft, |
|
.maxlen = sizeof(pipe_user_pages_soft), |
|
.mode = 0644, |
|
.proc_handler = proc_doulongvec_minmax, |
|
}, |
|
{ |
|
.procname = "mount-max", |
|
.data = &sysctl_mount_max, |
|
.maxlen = sizeof(unsigned int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec_minmax, |
|
.extra1 = SYSCTL_ONE, |
|
}, |
|
{ } |
|
}; |
|
|
|
static struct ctl_table debug_table[] = { |
|
#ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
|
{ |
|
.procname = "exception-trace", |
|
.data = &show_unhandled_signals, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_dointvec |
|
}, |
|
#endif |
|
#if defined(CONFIG_OPTPROBES) |
|
{ |
|
.procname = "kprobes-optimization", |
|
.data = &sysctl_kprobes_optimization, |
|
.maxlen = sizeof(int), |
|
.mode = 0644, |
|
.proc_handler = proc_kprobes_optimization_handler, |
|
.extra1 = SYSCTL_ZERO, |
|
.extra2 = SYSCTL_ONE, |
|
}, |
|
#endif |
|
{ } |
|
}; |
|
|
|
static struct ctl_table dev_table[] = { |
|
{ } |
|
}; |
|
|
|
static struct ctl_table sysctl_base_table[] = { |
|
{ |
|
.procname = "kernel", |
|
.mode = 0555, |
|
.child = kern_table, |
|
}, |
|
{ |
|
.procname = "vm", |
|
.mode = 0555, |
|
.child = vm_table, |
|
}, |
|
{ |
|
.procname = "fs", |
|
.mode = 0555, |
|
.child = fs_table, |
|
}, |
|
{ |
|
.procname = "debug", |
|
.mode = 0555, |
|
.child = debug_table, |
|
}, |
|
{ |
|
.procname = "dev", |
|
.mode = 0555, |
|
.child = dev_table, |
|
}, |
|
{ } |
|
}; |
|
|
|
int __init sysctl_init(void) |
|
{ |
|
struct ctl_table_header *hdr; |
|
|
|
hdr = register_sysctl_table(sysctl_base_table); |
|
kmemleak_not_leak(hdr); |
|
return 0; |
|
} |
|
#endif /* CONFIG_SYSCTL */ |
|
/* |
|
* No sense putting this after each symbol definition, twice, |
|
* exception granted :-) |
|
*/ |
|
EXPORT_SYMBOL(proc_dobool); |
|
EXPORT_SYMBOL(proc_dointvec); |
|
EXPORT_SYMBOL(proc_douintvec); |
|
EXPORT_SYMBOL(proc_dointvec_jiffies); |
|
EXPORT_SYMBOL(proc_dointvec_minmax); |
|
EXPORT_SYMBOL_GPL(proc_douintvec_minmax); |
|
EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); |
|
EXPORT_SYMBOL(proc_dointvec_ms_jiffies); |
|
EXPORT_SYMBOL(proc_dostring); |
|
EXPORT_SYMBOL(proc_doulongvec_minmax); |
|
EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |
|
EXPORT_SYMBOL(proc_do_large_bitmap);
|
|
|