ad5d69899e
Pull perf updates from Ingo Molnar:
"As a first remark I'd like to note that the way to build perf tooling
has been simplified and sped up, in the future it should be enough for
you to build perf via:
cd tools/perf/
make install
(ie without the -j option.) The build system will figure out the
number of CPUs and will do a parallel build+install.
The various build system inefficiencies and breakages Linus reported
against the v3.12 pull request should now be resolved - please
(re-)report any remaining annoyances or bugs.
Main changes on the perf kernel side:
* Performance optimizations:
. perf ring-buffer code optimizations, by Peter Zijlstra
. perf ring-buffer code optimizations, by Oleg Nesterov
. x86 NMI call-stack processing optimizations, by Peter Zijlstra
. perf context-switch optimizations, by Peter Zijlstra
. perf sampling speedups, by Peter Zijlstra
. x86 Intel PEBS processing speedups, by Peter Zijlstra
* Enhanced hardware support:
. for Intel Ivy Bridge-EP uncore PMUs, by Zheng Yan
. for Haswell transactions, by Andi Kleen, Peter Zijlstra
* Core perf events code enhancements and fixes by Oleg Nesterov:
. for uprobes, if fork() is called with pending ret-probes
. for uprobes platform support code
* New ABI details by Andi Kleen:
. Report x86 Haswell TSX transaction abort cost as weight
Main changes on the perf tooling side (some of these tooling changes
utilize the above kernel side changes):
* 'perf report/top' enhancements:
. Convert callchain children list to rbtree, greatly reducing the
time taken for callchain processing, from Namhyung Kim.
. Add new COMM infrastructure, further improving histogram
processing, from Frédéric Weisbecker, one fix from Namhyung Kim.
. Add /proc/kcore based live-annotation improvements, including
build-id cache support, multi map 'call' instruction navigation
fixes, kcore address validation, objdump workarounds. From
Adrian Hunter.
. Show progress on histogram collapsing, that can take a long
time, from Namhyung Kim.
. Add --max-stack option to limit callchain stack scan in 'top'
and 'report', improving callchain processing when reducing the
stack depth is an option, from Waiman Long.
. Add new option --ignore-vmlinux for perf top, from Willy
Tarreau.
* 'perf trace' enhancements:
. 'perf trace' now can can use a 'perf probe' dynamic tracepoints
to hook into the userspace -> kernel pathname copy so that it
can map fds to pathnames without reading /proc/pid/fd/ symlinks.
From Arnaldo Carvalho de Melo.
. Show VFS path associated with fd in live sessions, using a
'vfs_getname' 'perf probe' created dynamic tracepoint or by
looking at /proc/pid/fd, from Arnaldo Carvalho de Melo.
. Add 'trace' beautifiers for lots of syscall arguments, from
Arnaldo Carvalho de Melo.
. Implement more compact 'trace' output by suppressing zeroed
args, from Arnaldo Carvalho de Melo.
. Show thread COMM by default in 'trace', from Arnaldo Carvalho de
Melo.
. Add option to show full timestamp in 'trace', from David Ahern.
. Add 'record' command in 'trace', to record raw_syscalls:*, from
David Ahern.
. Add summary option to dump syscall statistics in 'trace', from
David Ahern.
. Improve error messages in 'trace', providing hints about system
configuration steps needed for using it, from Ramkumar
Ramachandra.
. 'perf trace' now emits hints as to why tracing is not possible,
helping the user to setup the system to allow tracing in the
desired permission granularity, telling if the problem is due to
debugfs not being mounted or with not enough permission for
!root, /proc/sys/kernel/perf_event_paranoit value, etc. From
Arnaldo Carvalho de Melo.
* 'perf record' enhancements:
. Check maximum frequency rate for record/top, emitting better
error messages, from Jiri Olsa.
. 'perf record' code cleanups, from David Ahern.
. Improve write_output error message in 'perf record', from Adrian
Hunter.
. Allow specifying B/K/M/G unit to the --mmap-pages arguments,
from Jiri Olsa.
. Fix command line callchain attribute tests to handle the new
-g/--call-chain semantics, from Arnaldo Carvalho de Melo.
* 'perf kvm' enhancements:
. Disable live kvm command if timerfd is not supported, from David
Ahern.
. Fix detection of non-core features, from David Ahern.
* 'perf list' enhancements:
. Add usage to 'perf list', from David Ahern.
. Show error in 'perf list' if tracepoints not available, from
Pekka Enberg.
* 'perf probe' enhancements:
. Support "$vars" meta argument syntax for local variables,
allowing asking for all possible variables at a given probe
point to be collected when it hits, from Masami Hiramatsu.
* 'perf sched' enhancements:
. Address the root cause of that 'perf sched' stack initialization
build slowdown, by programmatically setting a big array after
moving the global variable back to the stack. Fix from Adrian
Hunter.
* 'perf script' enhancements:
. Set up output options for in-stream attributes, from Adrian
Hunter.
. Print addr by default for BTS in 'perf script', from Adrian
Juntmer
* 'perf stat' enhancements:
. Improved messages when doing profiling in all or a subset of
CPUs using a workload as the session delimitator, as in:
'perf stat --cpu 0,2 sleep 10s'
from Arnaldo Carvalho de Melo.
. Add units to nanosec-based counters in 'perf stat', from David
Ahern.
. Remove bogus info when using 'perf stat' -e cycles/instructions,
from Ramkumar Ramachandra.
* 'perf lock' enhancements:
. 'perf lock' fixes and cleanups, from Davidlohr Bueso.
* 'perf test' enhancements:
. Fixup PERF_SAMPLE_TRANSACTION handling in sample synthesizing
and 'perf test', from Adrian Hunter.
. Clarify the "sample parsing" test entry, from Arnaldo Carvalho
de Melo.
. Consider PERF_SAMPLE_TRANSACTION in the "sample parsing" test,
from Arnaldo Carvalho de Melo.
. Memory leak fixes in 'perf test', from Felipe Pena.
* 'perf bench' enhancements:
. Change the procps visible command-name of invididual benchmark
tests plus cleanups, from Ingo Molnar.
* Generic perf tooling infrastructure/plumbing changes:
. Separating data file properties from session, code
reorganization from Jiri Olsa.
. Fix version when building out of tree, as when using one of
these:
$ make help | grep perf
perf-tar-src-pkg - Build perf-3.12.0.tar source tarball
perf-targz-src-pkg - Build perf-3.12.0.tar.gz source tarball
perf-tarbz2-src-pkg - Build perf-3.12.0.tar.bz2 source tarball
perf-tarxz-src-pkg - Build perf-3.12.0.tar.xz source tarball
$
from David Ahern.
. Enhance option parse error message, showing just the help lines
of the options affected, from Namhyung Kim.
. libtraceevent updates from upstream trace-cmd repo, from Steven
Rostedt.
. Always use perf_evsel__set_sample_bit to set sample_type, from
Adrian Hunter.
. Memory and mmap leak fixes from Chenggang Qin.
. Assorted build fixes for from David Ahern and Jiri Olsa.
. Speed up and prettify the build system, from Ingo Molnar.
. Implement addr2line directly using libbfd, from Roberto Vitillo.
. Separate the GTK support in a separate libperf-gtk.so DSO, that
is only loaded when --gtk is specified, from Namhyung Kim.
. perf bash completion fixes and improvements from Ramkumar
Ramachandra.
. Support for Openembedded/Yocto -dbg packages, from Ricardo
Ribalda Delgado.
And lots and lots of other fixes and code reorganizations that did not
make it into the list, see the shortlog, diffstat and the Git log for
details!"
* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (300 commits)
uprobes: Fix the memory out of bound overwrite in copy_insn()
uprobes: Fix the wrong usage of current->utask in uprobe_copy_process()
perf tools: Remove unneeded include
perf record: Remove post_processing_offset variable
perf record: Remove advance_output function
perf record: Refactor feature handling into a separate function
perf trace: Don't relookup fields by name in each sample
perf tools: Fix version when building out of tree
perf evsel: Ditch evsel->handler.data field
uprobes: Export write_opcode() as uprobe_write_opcode()
uprobes: Introduce arch_uprobe->ixol
uprobes: Kill module_init() and module_exit()
uprobes: Move function declarations out of arch
perf/x86/intel: Add Ivy Bridge-EP uncore IRP box support
perf/x86/intel/uncore: Add filter support for IvyBridge-EP QPI boxes
perf: Factor out strncpy() in perf_event_mmap_event()
tools/perf: Add required memory barriers
perf: Fix arch_perf_out_copy_user default
perf: Update a stale comment
perf: Optimize perf_output_begin() -- address calculation
...
2673 lines
61 KiB
C
2673 lines
61 KiB
C
/*
|
|
* sysctl.c: General linux system control interface
|
|
*
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|
* Begun 24 March 1995, Stephen Tweedie
|
|
* Added /proc support, Dec 1995
|
|
* 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.
|
|
* Dynamic registration fixes, Stephen Tweedie.
|
|
* Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn.
|
|
* Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris
|
|
* Horn.
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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
|
|
* 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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#include <linux/module.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/printk.h>
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|
#include <linux/proc_fs.h>
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|
#include <linux/security.h>
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|
#include <linux/ctype.h>
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|
#include <linux/kmemcheck.h>
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|
#include <linux/kmemleak.h>
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|
#include <linux/fs.h>
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|
#include <linux/init.h>
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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>
|
|
#include <linux/ratelimit.h>
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|
#include <linux/compaction.h>
|
|
#include <linux/hugetlb.h>
|
|
#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>
|
|
#include <linux/oom.h>
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|
#include <linux/kmod.h>
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|
#include <linux/capability.h>
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|
#include <linux/binfmts.h>
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|
#include <linux/sched/sysctl.h>
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|
|
|
#include <asm/uaccess.h>
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|
#include <asm/processor.h>
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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
|
|
#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_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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|
|
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/* External variables not in a header file. */
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|
extern int sysctl_overcommit_memory;
|
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extern int sysctl_overcommit_ratio;
|
|
extern int max_threads;
|
|
extern int suid_dumpable;
|
|
#ifdef CONFIG_COREDUMP
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|
extern int core_uses_pid;
|
|
extern char core_pattern[];
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|
extern unsigned int core_pipe_limit;
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|
#endif
|
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extern int pid_max;
|
|
extern int pid_max_min, pid_max_max;
|
|
extern int percpu_pagelist_fraction;
|
|
extern int compat_log;
|
|
extern int latencytop_enabled;
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extern int sysctl_nr_open_min, sysctl_nr_open_max;
|
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#ifndef CONFIG_MMU
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extern int sysctl_nr_trim_pages;
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#endif
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#ifdef CONFIG_BLOCK
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extern int blk_iopoll_enabled;
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#endif
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|
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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 zero;
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static int __maybe_unused one = 1;
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static int __maybe_unused two = 2;
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static int __maybe_unused three = 3;
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static unsigned long one_ul = 1;
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static int one_hundred = 100;
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#ifdef CONFIG_PRINTK
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static int ten_thousand = 10000;
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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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static int min_percpu_pagelist_fract = 8;
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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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#ifdef CONFIG_INOTIFY_USER
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#include <linux/inotify.h>
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#endif
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#ifdef CONFIG_SPARC
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#endif
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#ifdef CONFIG_SPARC64
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extern int sysctl_tsb_ratio;
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#endif
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#ifdef __hppa__
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extern int pwrsw_enabled;
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#endif
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#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
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extern int unaligned_enabled;
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#endif
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#ifdef CONFIG_IA64
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extern int unaligned_dump_stack;
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#endif
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|
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#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
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extern int no_unaligned_warning;
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#endif
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#ifdef CONFIG_PROC_SYSCTL
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static int proc_do_cad_pid(struct ctl_table *table, int write,
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void __user *buffer, size_t *lenp, loff_t *ppos);
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static int proc_taint(struct ctl_table *table, int write,
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void __user *buffer, size_t *lenp, loff_t *ppos);
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#endif
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|
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#ifdef CONFIG_PRINTK
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static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
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void __user *buffer, size_t *lenp, loff_t *ppos);
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#endif
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static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
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void __user *buffer, size_t *lenp, loff_t *ppos);
|
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#ifdef CONFIG_COREDUMP
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static int proc_dostring_coredump(struct ctl_table *table, int write,
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void __user *buffer, size_t *lenp, loff_t *ppos);
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#endif
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#ifdef CONFIG_MAGIC_SYSRQ
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/* Note: sysrq code uses it's own private copy */
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static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE;
|
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|
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static int sysrq_sysctl_handler(ctl_table *table, int write,
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void __user *buffer, size_t *lenp,
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loff_t *ppos)
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{
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int error;
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|
|
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error = proc_dointvec(table, write, buffer, lenp, ppos);
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|
if (error)
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return error;
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|
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if (write)
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sysrq_toggle_support(__sysrq_enabled);
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|
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return 0;
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}
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|
|
|
#endif
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|
|
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static struct ctl_table kern_table[];
|
|
static struct ctl_table vm_table[];
|
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static struct ctl_table fs_table[];
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static struct ctl_table debug_table[];
|
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static struct ctl_table dev_table[];
|
|
extern struct ctl_table random_table[];
|
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#ifdef CONFIG_EPOLL
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extern struct ctl_table epoll_table[];
|
|
#endif
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|
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#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
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int sysctl_legacy_va_layout;
|
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#endif
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|
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/* The default sysctl tables: */
|
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static struct ctl_table sysctl_base_table[] = {
|
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{
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.procname = "kernel",
|
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.mode = 0555,
|
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.child = kern_table,
|
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},
|
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{
|
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.procname = "vm",
|
|
.mode = 0555,
|
|
.child = vm_table,
|
|
},
|
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{
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.procname = "fs",
|
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.mode = 0555,
|
|
.child = fs_table,
|
|
},
|
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{
|
|
.procname = "debug",
|
|
.mode = 0555,
|
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.child = debug_table,
|
|
},
|
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{
|
|
.procname = "dev",
|
|
.mode = 0555,
|
|
.child = dev_table,
|
|
},
|
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{ }
|
|
};
|
|
|
|
#ifdef CONFIG_SCHED_DEBUG
|
|
static int min_sched_granularity_ns = 100000; /* 100 usecs */
|
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static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */
|
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static int min_wakeup_granularity_ns; /* 0 usecs */
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static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */
|
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#ifdef CONFIG_SMP
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static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
|
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static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
|
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#endif /* CONFIG_SMP */
|
|
#endif /* CONFIG_SCHED_DEBUG */
|
|
|
|
#ifdef CONFIG_COMPACTION
|
|
static int min_extfrag_threshold;
|
|
static int max_extfrag_threshold = 1000;
|
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#endif
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|
|
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static struct ctl_table kern_table[] = {
|
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{
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.procname = "sched_child_runs_first",
|
|
.data = &sysctl_sched_child_runs_first,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
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.proc_handler = proc_dointvec,
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|
},
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#ifdef CONFIG_SCHED_DEBUG
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{
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|
.procname = "sched_min_granularity_ns",
|
|
.data = &sysctl_sched_min_granularity,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = sched_proc_update_handler,
|
|
.extra1 = &min_sched_granularity_ns,
|
|
.extra2 = &max_sched_granularity_ns,
|
|
},
|
|
{
|
|
.procname = "sched_latency_ns",
|
|
.data = &sysctl_sched_latency,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = sched_proc_update_handler,
|
|
.extra1 = &min_sched_granularity_ns,
|
|
.extra2 = &max_sched_granularity_ns,
|
|
},
|
|
{
|
|
.procname = "sched_wakeup_granularity_ns",
|
|
.data = &sysctl_sched_wakeup_granularity,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = sched_proc_update_handler,
|
|
.extra1 = &min_wakeup_granularity_ns,
|
|
.extra2 = &max_wakeup_granularity_ns,
|
|
},
|
|
#ifdef CONFIG_SMP
|
|
{
|
|
.procname = "sched_tunable_scaling",
|
|
.data = &sysctl_sched_tunable_scaling,
|
|
.maxlen = sizeof(enum sched_tunable_scaling),
|
|
.mode = 0644,
|
|
.proc_handler = sched_proc_update_handler,
|
|
.extra1 = &min_sched_tunable_scaling,
|
|
.extra2 = &max_sched_tunable_scaling,
|
|
},
|
|
{
|
|
.procname = "sched_migration_cost_ns",
|
|
.data = &sysctl_sched_migration_cost,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "sched_nr_migrate",
|
|
.data = &sysctl_sched_nr_migrate,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "sched_time_avg_ms",
|
|
.data = &sysctl_sched_time_avg,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "sched_shares_window_ns",
|
|
.data = &sysctl_sched_shares_window,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "timer_migration",
|
|
.data = &sysctl_timer_migration,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
#endif /* CONFIG_SMP */
|
|
#ifdef CONFIG_NUMA_BALANCING
|
|
{
|
|
.procname = "numa_balancing_scan_delay_ms",
|
|
.data = &sysctl_numa_balancing_scan_delay,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "numa_balancing_scan_period_min_ms",
|
|
.data = &sysctl_numa_balancing_scan_period_min,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "numa_balancing_scan_period_reset",
|
|
.data = &sysctl_numa_balancing_scan_period_reset,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "numa_balancing_scan_period_max_ms",
|
|
.data = &sysctl_numa_balancing_scan_period_max,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "numa_balancing_scan_size_mb",
|
|
.data = &sysctl_numa_balancing_scan_size,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif /* CONFIG_NUMA_BALANCING */
|
|
#endif /* CONFIG_SCHED_DEBUG */
|
|
{
|
|
.procname = "sched_rt_period_us",
|
|
.data = &sysctl_sched_rt_period,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = sched_rt_handler,
|
|
},
|
|
{
|
|
.procname = "sched_rt_runtime_us",
|
|
.data = &sysctl_sched_rt_runtime,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = sched_rt_handler,
|
|
},
|
|
{
|
|
.procname = "sched_rr_timeslice_ms",
|
|
.data = &sched_rr_timeslice,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = sched_rr_handler,
|
|
},
|
|
#ifdef CONFIG_SCHED_AUTOGROUP
|
|
{
|
|
.procname = "sched_autogroup_enabled",
|
|
.data = &sysctl_sched_autogroup_enabled,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_CFS_BANDWIDTH
|
|
{
|
|
.procname = "sched_cfs_bandwidth_slice_us",
|
|
.data = &sysctl_sched_cfs_bandwidth_slice,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &one,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_PROVE_LOCKING
|
|
{
|
|
.procname = "prove_locking",
|
|
.data = &prove_locking,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_LOCK_STAT
|
|
{
|
|
.procname = "lock_stat",
|
|
.data = &lock_stat,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "panic",
|
|
.data = &panic_timeout,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#ifdef CONFIG_COREDUMP
|
|
{
|
|
.procname = "core_uses_pid",
|
|
.data = &core_uses_pid,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "core_pattern",
|
|
.data = core_pattern,
|
|
.maxlen = CORENAME_MAX_SIZE,
|
|
.mode = 0644,
|
|
.proc_handler = proc_dostring_coredump,
|
|
},
|
|
{
|
|
.procname = "core_pipe_limit",
|
|
.data = &core_pipe_limit,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_PROC_SYSCTL
|
|
{
|
|
.procname = "tainted",
|
|
.maxlen = sizeof(long),
|
|
.mode = 0644,
|
|
.proc_handler = proc_taint,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_LATENCYTOP
|
|
{
|
|
.procname = "latencytop",
|
|
.data = &latencytop_enabled,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
{
|
|
.procname = "real-root-dev",
|
|
.data = &real_root_dev,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "print-fatal-signals",
|
|
.data = &print_fatal_signals,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#ifdef CONFIG_SPARC
|
|
{
|
|
.procname = "reboot-cmd",
|
|
.data = reboot_command,
|
|
.maxlen = 256,
|
|
.mode = 0644,
|
|
.proc_handler = proc_dostring,
|
|
},
|
|
{
|
|
.procname = "stop-a",
|
|
.data = &stop_a_enabled,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "scons-poweroff",
|
|
.data = &scons_pwroff,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_SPARC64
|
|
{
|
|
.procname = "tsb-ratio",
|
|
.data = &sysctl_tsb_ratio,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef __hppa__
|
|
{
|
|
.procname = "soft-power",
|
|
.data = &pwrsw_enabled,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
|
|
{
|
|
.procname = "unaligned-trap",
|
|
.data = &unaligned_enabled,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "ctrl-alt-del",
|
|
.data = &C_A_D,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
{
|
|
.procname = "ftrace_enabled",
|
|
.data = &ftrace_enabled,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = ftrace_enable_sysctl,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_STACK_TRACER
|
|
{
|
|
.procname = "stack_tracer_enabled",
|
|
.data = &stack_tracer_enabled,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = stack_trace_sysctl,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_TRACING
|
|
{
|
|
.procname = "ftrace_dump_on_oops",
|
|
.data = &ftrace_dump_on_oops,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "traceoff_on_warning",
|
|
.data = &__disable_trace_on_warning,
|
|
.maxlen = sizeof(__disable_trace_on_warning),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_MODULES
|
|
{
|
|
.procname = "modprobe",
|
|
.data = &modprobe_path,
|
|
.maxlen = KMOD_PATH_LEN,
|
|
.mode = 0644,
|
|
.proc_handler = proc_dostring,
|
|
},
|
|
{
|
|
.procname = "modules_disabled",
|
|
.data = &modules_disabled,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
/* only handle a transition from default "0" to "1" */
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &one,
|
|
.extra2 = &one,
|
|
},
|
|
#endif
|
|
|
|
{
|
|
.procname = "hotplug",
|
|
.data = &uevent_helper,
|
|
.maxlen = UEVENT_HELPER_PATH_LEN,
|
|
.mode = 0644,
|
|
.proc_handler = proc_dostring,
|
|
},
|
|
|
|
#ifdef CONFIG_CHR_DEV_SG
|
|
{
|
|
.procname = "sg-big-buff",
|
|
.data = &sg_big_buff,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0444,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_BSD_PROCESS_ACCT
|
|
{
|
|
.procname = "acct",
|
|
.data = &acct_parm,
|
|
.maxlen = 3*sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_MAGIC_SYSRQ
|
|
{
|
|
.procname = "sysrq",
|
|
.data = &__sysrq_enabled,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = sysrq_sysctl_handler,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_PROC_SYSCTL
|
|
{
|
|
.procname = "cad_pid",
|
|
.data = NULL,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0600,
|
|
.proc_handler = proc_do_cad_pid,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "threads-max",
|
|
.data = &max_threads,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "random",
|
|
.mode = 0555,
|
|
.child = random_table,
|
|
},
|
|
{
|
|
.procname = "usermodehelper",
|
|
.mode = 0555,
|
|
.child = usermodehelper_table,
|
|
},
|
|
{
|
|
.procname = "overflowuid",
|
|
.data = &overflowuid,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &minolduid,
|
|
.extra2 = &maxolduid,
|
|
},
|
|
{
|
|
.procname = "overflowgid",
|
|
.data = &overflowgid,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &minolduid,
|
|
.extra2 = &maxolduid,
|
|
},
|
|
#ifdef CONFIG_S390
|
|
#ifdef CONFIG_MATHEMU
|
|
{
|
|
.procname = "ieee_emulation_warnings",
|
|
.data = &sysctl_ieee_emulation_warnings,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "userprocess_debug",
|
|
.data = &show_unhandled_signals,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "pid_max",
|
|
.data = &pid_max,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &pid_max_min,
|
|
.extra2 = &pid_max_max,
|
|
},
|
|
{
|
|
.procname = "panic_on_oops",
|
|
.data = &panic_on_oops,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#if defined CONFIG_PRINTK
|
|
{
|
|
.procname = "printk",
|
|
.data = &console_loglevel,
|
|
.maxlen = 4*sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "printk_ratelimit",
|
|
.data = &printk_ratelimit_state.interval,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.procname = "printk_ratelimit_burst",
|
|
.data = &printk_ratelimit_state.burst,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "printk_delay",
|
|
.data = &printk_delay_msec,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &ten_thousand,
|
|
},
|
|
{
|
|
.procname = "dmesg_restrict",
|
|
.data = &dmesg_restrict,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax_sysadmin,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
{
|
|
.procname = "kptr_restrict",
|
|
.data = &kptr_restrict,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax_sysadmin,
|
|
.extra1 = &zero,
|
|
.extra2 = &two,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "ngroups_max",
|
|
.data = &ngroups_max,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0444,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "cap_last_cap",
|
|
.data = (void *)&cap_last_cap,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0444,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#if defined(CONFIG_LOCKUP_DETECTOR)
|
|
{
|
|
.procname = "watchdog",
|
|
.data = &watchdog_user_enabled,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dowatchdog,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
{
|
|
.procname = "watchdog_thresh",
|
|
.data = &watchdog_thresh,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dowatchdog,
|
|
.extra1 = &zero,
|
|
.extra2 = &sixty,
|
|
},
|
|
{
|
|
.procname = "softlockup_panic",
|
|
.data = &softlockup_panic,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
{
|
|
.procname = "nmi_watchdog",
|
|
.data = &watchdog_user_enabled,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dowatchdog,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
#endif
|
|
#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
|
|
{
|
|
.procname = "unknown_nmi_panic",
|
|
.data = &unknown_nmi_panic,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#if defined(CONFIG_X86)
|
|
{
|
|
.procname = "panic_on_unrecovered_nmi",
|
|
.data = &panic_on_unrecovered_nmi,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "panic_on_io_nmi",
|
|
.data = &panic_on_io_nmi,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#ifdef CONFIG_DEBUG_STACKOVERFLOW
|
|
{
|
|
.procname = "panic_on_stackoverflow",
|
|
.data = &sysctl_panic_on_stackoverflow,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "bootloader_type",
|
|
.data = &bootloader_type,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0444,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "bootloader_version",
|
|
.data = &bootloader_version,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0444,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "kstack_depth_to_print",
|
|
.data = &kstack_depth_to_print,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "io_delay_type",
|
|
.data = &io_delay_type,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#if defined(CONFIG_MMU)
|
|
{
|
|
.procname = "randomize_va_space",
|
|
.data = &randomize_va_space,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#if defined(CONFIG_S390) && defined(CONFIG_SMP)
|
|
{
|
|
.procname = "spin_retry",
|
|
.data = &spin_retry,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
|
|
{
|
|
.procname = "acpi_video_flags",
|
|
.data = &acpi_realmode_flags,
|
|
.maxlen = sizeof (unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = proc_doulongvec_minmax,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
|
|
{
|
|
.procname = "ignore-unaligned-usertrap",
|
|
.data = &no_unaligned_warning,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_IA64
|
|
{
|
|
.procname = "unaligned-dump-stack",
|
|
.data = &unaligned_dump_stack,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_DETECT_HUNG_TASK
|
|
{
|
|
.procname = "hung_task_panic",
|
|
.data = &sysctl_hung_task_panic,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
{
|
|
.procname = "hung_task_check_count",
|
|
.data = &sysctl_hung_task_check_count,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = proc_doulongvec_minmax,
|
|
},
|
|
{
|
|
.procname = "hung_task_timeout_secs",
|
|
.data = &sysctl_hung_task_timeout_secs,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dohung_task_timeout_secs,
|
|
},
|
|
{
|
|
.procname = "hung_task_warnings",
|
|
.data = &sysctl_hung_task_warnings,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = proc_doulongvec_minmax,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_COMPAT
|
|
{
|
|
.procname = "compat-log",
|
|
.data = &compat_log,
|
|
.maxlen = sizeof (int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#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_RCU_TORTURE_TEST
|
|
{
|
|
.procname = "rcutorture_runnable",
|
|
.data = &rcutorture_runnable,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_PERF_EVENTS
|
|
/*
|
|
* User-space scripts rely on the existence of this file
|
|
* as a feature check for perf_events being enabled.
|
|
*
|
|
* So it's an ABI, do not remove!
|
|
*/
|
|
{
|
|
.procname = "perf_event_paranoid",
|
|
.data = &sysctl_perf_event_paranoid,
|
|
.maxlen = sizeof(sysctl_perf_event_paranoid),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "perf_event_mlock_kb",
|
|
.data = &sysctl_perf_event_mlock,
|
|
.maxlen = sizeof(sysctl_perf_event_mlock),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "perf_event_max_sample_rate",
|
|
.data = &sysctl_perf_event_sample_rate,
|
|
.maxlen = sizeof(sysctl_perf_event_sample_rate),
|
|
.mode = 0644,
|
|
.proc_handler = perf_proc_update_handler,
|
|
.extra1 = &one,
|
|
},
|
|
{
|
|
.procname = "perf_cpu_time_max_percent",
|
|
.data = &sysctl_perf_cpu_time_max_percent,
|
|
.maxlen = sizeof(sysctl_perf_cpu_time_max_percent),
|
|
.mode = 0644,
|
|
.proc_handler = perf_cpu_time_max_percent_handler,
|
|
.extra1 = &zero,
|
|
.extra2 = &one_hundred,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_KMEMCHECK
|
|
{
|
|
.procname = "kmemcheck",
|
|
.data = &kmemcheck_enabled,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_BLOCK
|
|
{
|
|
.procname = "blk_iopoll",
|
|
.data = &blk_iopoll_enabled,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
{ }
|
|
};
|
|
|
|
static struct ctl_table vm_table[] = {
|
|
{
|
|
.procname = "overcommit_memory",
|
|
.data = &sysctl_overcommit_memory,
|
|
.maxlen = sizeof(sysctl_overcommit_memory),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &two,
|
|
},
|
|
{
|
|
.procname = "panic_on_oom",
|
|
.data = &sysctl_panic_on_oom,
|
|
.maxlen = sizeof(sysctl_panic_on_oom),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &two,
|
|
},
|
|
{
|
|
.procname = "oom_kill_allocating_task",
|
|
.data = &sysctl_oom_kill_allocating_task,
|
|
.maxlen = sizeof(sysctl_oom_kill_allocating_task),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "oom_dump_tasks",
|
|
.data = &sysctl_oom_dump_tasks,
|
|
.maxlen = sizeof(sysctl_oom_dump_tasks),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "overcommit_ratio",
|
|
.data = &sysctl_overcommit_ratio,
|
|
.maxlen = sizeof(sysctl_overcommit_ratio),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "page-cluster",
|
|
.data = &page_cluster,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
},
|
|
{
|
|
.procname = "dirty_background_ratio",
|
|
.data = &dirty_background_ratio,
|
|
.maxlen = sizeof(dirty_background_ratio),
|
|
.mode = 0644,
|
|
.proc_handler = dirty_background_ratio_handler,
|
|
.extra1 = &zero,
|
|
.extra2 = &one_hundred,
|
|
},
|
|
{
|
|
.procname = "dirty_background_bytes",
|
|
.data = &dirty_background_bytes,
|
|
.maxlen = sizeof(dirty_background_bytes),
|
|
.mode = 0644,
|
|
.proc_handler = dirty_background_bytes_handler,
|
|
.extra1 = &one_ul,
|
|
},
|
|
{
|
|
.procname = "dirty_ratio",
|
|
.data = &vm_dirty_ratio,
|
|
.maxlen = sizeof(vm_dirty_ratio),
|
|
.mode = 0644,
|
|
.proc_handler = dirty_ratio_handler,
|
|
.extra1 = &zero,
|
|
.extra2 = &one_hundred,
|
|
},
|
|
{
|
|
.procname = "dirty_bytes",
|
|
.data = &vm_dirty_bytes,
|
|
.maxlen = sizeof(vm_dirty_bytes),
|
|
.mode = 0644,
|
|
.proc_handler = dirty_bytes_handler,
|
|
.extra1 = &dirty_bytes_min,
|
|
},
|
|
{
|
|
.procname = "dirty_writeback_centisecs",
|
|
.data = &dirty_writeback_interval,
|
|
.maxlen = sizeof(dirty_writeback_interval),
|
|
.mode = 0644,
|
|
.proc_handler = dirty_writeback_centisecs_handler,
|
|
},
|
|
{
|
|
.procname = "dirty_expire_centisecs",
|
|
.data = &dirty_expire_interval,
|
|
.maxlen = sizeof(dirty_expire_interval),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
},
|
|
{
|
|
.procname = "nr_pdflush_threads",
|
|
.mode = 0444 /* read-only */,
|
|
.proc_handler = pdflush_proc_obsolete,
|
|
},
|
|
{
|
|
.procname = "swappiness",
|
|
.data = &vm_swappiness,
|
|
.maxlen = sizeof(vm_swappiness),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one_hundred,
|
|
},
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
{
|
|
.procname = "nr_hugepages",
|
|
.data = NULL,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = hugetlb_sysctl_handler,
|
|
.extra1 = (void *)&hugetlb_zero,
|
|
.extra2 = (void *)&hugetlb_infinity,
|
|
},
|
|
#ifdef CONFIG_NUMA
|
|
{
|
|
.procname = "nr_hugepages_mempolicy",
|
|
.data = NULL,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = &hugetlb_mempolicy_sysctl_handler,
|
|
.extra1 = (void *)&hugetlb_zero,
|
|
.extra2 = (void *)&hugetlb_infinity,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "hugetlb_shm_group",
|
|
.data = &sysctl_hugetlb_shm_group,
|
|
.maxlen = sizeof(gid_t),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "hugepages_treat_as_movable",
|
|
.data = &hugepages_treat_as_movable,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
{
|
|
.procname = "nr_overcommit_hugepages",
|
|
.data = NULL,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = hugetlb_overcommit_handler,
|
|
.extra1 = (void *)&hugetlb_zero,
|
|
.extra2 = (void *)&hugetlb_infinity,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "lowmem_reserve_ratio",
|
|
.data = &sysctl_lowmem_reserve_ratio,
|
|
.maxlen = sizeof(sysctl_lowmem_reserve_ratio),
|
|
.mode = 0644,
|
|
.proc_handler = lowmem_reserve_ratio_sysctl_handler,
|
|
},
|
|
{
|
|
.procname = "drop_caches",
|
|
.data = &sysctl_drop_caches,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = drop_caches_sysctl_handler,
|
|
.extra1 = &one,
|
|
.extra2 = &three,
|
|
},
|
|
#ifdef CONFIG_COMPACTION
|
|
{
|
|
.procname = "compact_memory",
|
|
.data = &sysctl_compact_memory,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0200,
|
|
.proc_handler = sysctl_compaction_handler,
|
|
},
|
|
{
|
|
.procname = "extfrag_threshold",
|
|
.data = &sysctl_extfrag_threshold,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = sysctl_extfrag_handler,
|
|
.extra1 = &min_extfrag_threshold,
|
|
.extra2 = &max_extfrag_threshold,
|
|
},
|
|
|
|
#endif /* CONFIG_COMPACTION */
|
|
{
|
|
.procname = "min_free_kbytes",
|
|
.data = &min_free_kbytes,
|
|
.maxlen = sizeof(min_free_kbytes),
|
|
.mode = 0644,
|
|
.proc_handler = min_free_kbytes_sysctl_handler,
|
|
.extra1 = &zero,
|
|
},
|
|
{
|
|
.procname = "percpu_pagelist_fraction",
|
|
.data = &percpu_pagelist_fraction,
|
|
.maxlen = sizeof(percpu_pagelist_fraction),
|
|
.mode = 0644,
|
|
.proc_handler = percpu_pagelist_fraction_sysctl_handler,
|
|
.extra1 = &min_percpu_pagelist_fract,
|
|
},
|
|
#ifdef CONFIG_MMU
|
|
{
|
|
.procname = "max_map_count",
|
|
.data = &sysctl_max_map_count,
|
|
.maxlen = sizeof(sysctl_max_map_count),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
},
|
|
#else
|
|
{
|
|
.procname = "nr_trim_pages",
|
|
.data = &sysctl_nr_trim_pages,
|
|
.maxlen = sizeof(sysctl_nr_trim_pages),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "laptop_mode",
|
|
.data = &laptop_mode,
|
|
.maxlen = sizeof(laptop_mode),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.procname = "block_dump",
|
|
.data = &block_dump,
|
|
.maxlen = sizeof(block_dump),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
.extra1 = &zero,
|
|
},
|
|
{
|
|
.procname = "vfs_cache_pressure",
|
|
.data = &sysctl_vfs_cache_pressure,
|
|
.maxlen = sizeof(sysctl_vfs_cache_pressure),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
.extra1 = &zero,
|
|
},
|
|
#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
|
|
{
|
|
.procname = "legacy_va_layout",
|
|
.data = &sysctl_legacy_va_layout,
|
|
.maxlen = sizeof(sysctl_legacy_va_layout),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
.extra1 = &zero,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_NUMA
|
|
{
|
|
.procname = "zone_reclaim_mode",
|
|
.data = &zone_reclaim_mode,
|
|
.maxlen = sizeof(zone_reclaim_mode),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
.extra1 = &zero,
|
|
},
|
|
{
|
|
.procname = "min_unmapped_ratio",
|
|
.data = &sysctl_min_unmapped_ratio,
|
|
.maxlen = sizeof(sysctl_min_unmapped_ratio),
|
|
.mode = 0644,
|
|
.proc_handler = sysctl_min_unmapped_ratio_sysctl_handler,
|
|
.extra1 = &zero,
|
|
.extra2 = &one_hundred,
|
|
},
|
|
{
|
|
.procname = "min_slab_ratio",
|
|
.data = &sysctl_min_slab_ratio,
|
|
.maxlen = sizeof(sysctl_min_slab_ratio),
|
|
.mode = 0644,
|
|
.proc_handler = sysctl_min_slab_ratio_sysctl_handler,
|
|
.extra1 = &zero,
|
|
.extra2 = &one_hundred,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_SMP
|
|
{
|
|
.procname = "stat_interval",
|
|
.data = &sysctl_stat_interval,
|
|
.maxlen = sizeof(sysctl_stat_interval),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_jiffies,
|
|
},
|
|
#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",
|
|
.data = &vdso_enabled,
|
|
.maxlen = sizeof(vdso_enabled),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
.extra1 = &zero,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_HIGHMEM
|
|
{
|
|
.procname = "highmem_is_dirtyable",
|
|
.data = &vm_highmem_is_dirtyable,
|
|
.maxlen = sizeof(vm_highmem_is_dirtyable),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "scan_unevictable_pages",
|
|
.data = &scan_unevictable_pages,
|
|
.maxlen = sizeof(scan_unevictable_pages),
|
|
.mode = 0644,
|
|
.proc_handler = scan_unevictable_handler,
|
|
},
|
|
#ifdef CONFIG_MEMORY_FAILURE
|
|
{
|
|
.procname = "memory_failure_early_kill",
|
|
.data = &sysctl_memory_failure_early_kill,
|
|
.maxlen = sizeof(sysctl_memory_failure_early_kill),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
{
|
|
.procname = "memory_failure_recovery",
|
|
.data = &sysctl_memory_failure_recovery,
|
|
.maxlen = sizeof(sysctl_memory_failure_recovery),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "user_reserve_kbytes",
|
|
.data = &sysctl_user_reserve_kbytes,
|
|
.maxlen = sizeof(sysctl_user_reserve_kbytes),
|
|
.mode = 0644,
|
|
.proc_handler = proc_doulongvec_minmax,
|
|
},
|
|
{
|
|
.procname = "admin_reserve_kbytes",
|
|
.data = &sysctl_admin_reserve_kbytes,
|
|
.maxlen = sizeof(sysctl_admin_reserve_kbytes),
|
|
.mode = 0644,
|
|
.proc_handler = proc_doulongvec_minmax,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
|
|
static struct ctl_table binfmt_misc_table[] = {
|
|
{ }
|
|
};
|
|
#endif
|
|
|
|
static struct ctl_table fs_table[] = {
|
|
{
|
|
.procname = "inode-nr",
|
|
.data = &inodes_stat,
|
|
.maxlen = 2*sizeof(long),
|
|
.mode = 0444,
|
|
.proc_handler = proc_nr_inodes,
|
|
},
|
|
{
|
|
.procname = "inode-state",
|
|
.data = &inodes_stat,
|
|
.maxlen = 7*sizeof(long),
|
|
.mode = 0444,
|
|
.proc_handler = proc_nr_inodes,
|
|
},
|
|
{
|
|
.procname = "file-nr",
|
|
.data = &files_stat,
|
|
.maxlen = sizeof(files_stat),
|
|
.mode = 0444,
|
|
.proc_handler = proc_nr_files,
|
|
},
|
|
{
|
|
.procname = "file-max",
|
|
.data = &files_stat.max_files,
|
|
.maxlen = sizeof(files_stat.max_files),
|
|
.mode = 0644,
|
|
.proc_handler = proc_doulongvec_minmax,
|
|
},
|
|
{
|
|
.procname = "nr_open",
|
|
.data = &sysctl_nr_open,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &sysctl_nr_open_min,
|
|
.extra2 = &sysctl_nr_open_max,
|
|
},
|
|
{
|
|
.procname = "dentry-state",
|
|
.data = &dentry_stat,
|
|
.maxlen = 6*sizeof(long),
|
|
.mode = 0444,
|
|
.proc_handler = proc_nr_dentry,
|
|
},
|
|
{
|
|
.procname = "overflowuid",
|
|
.data = &fs_overflowuid,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &minolduid,
|
|
.extra2 = &maxolduid,
|
|
},
|
|
{
|
|
.procname = "overflowgid",
|
|
.data = &fs_overflowgid,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &minolduid,
|
|
.extra2 = &maxolduid,
|
|
},
|
|
#ifdef CONFIG_FILE_LOCKING
|
|
{
|
|
.procname = "leases-enable",
|
|
.data = &leases_enable,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_DNOTIFY
|
|
{
|
|
.procname = "dir-notify-enable",
|
|
.data = &dir_notify_enable,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_MMU
|
|
#ifdef CONFIG_FILE_LOCKING
|
|
{
|
|
.procname = "lease-break-time",
|
|
.data = &lease_break_time,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_AIO
|
|
{
|
|
.procname = "aio-nr",
|
|
.data = &aio_nr,
|
|
.maxlen = sizeof(aio_nr),
|
|
.mode = 0444,
|
|
.proc_handler = proc_doulongvec_minmax,
|
|
},
|
|
{
|
|
.procname = "aio-max-nr",
|
|
.data = &aio_max_nr,
|
|
.maxlen = sizeof(aio_max_nr),
|
|
.mode = 0644,
|
|
.proc_handler = proc_doulongvec_minmax,
|
|
},
|
|
#endif /* CONFIG_AIO */
|
|
#ifdef CONFIG_INOTIFY_USER
|
|
{
|
|
.procname = "inotify",
|
|
.mode = 0555,
|
|
.child = inotify_table,
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_EPOLL
|
|
{
|
|
.procname = "epoll",
|
|
.mode = 0555,
|
|
.child = epoll_table,
|
|
},
|
|
#endif
|
|
#endif
|
|
{
|
|
.procname = "protected_symlinks",
|
|
.data = &sysctl_protected_symlinks,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0600,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
{
|
|
.procname = "protected_hardlinks",
|
|
.data = &sysctl_protected_hardlinks,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0600,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
{
|
|
.procname = "suid_dumpable",
|
|
.data = &suid_dumpable,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax_coredump,
|
|
.extra1 = &zero,
|
|
.extra2 = &two,
|
|
},
|
|
#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
|
|
{
|
|
.procname = "binfmt_misc",
|
|
.mode = 0555,
|
|
.child = binfmt_misc_table,
|
|
},
|
|
#endif
|
|
{
|
|
.procname = "pipe-max-size",
|
|
.data = &pipe_max_size,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &pipe_proc_fn,
|
|
.extra1 = &pipe_min_size,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static struct ctl_table debug_table[] = {
|
|
#ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
|
|
{
|
|
.procname = "exception-trace",
|
|
.data = &show_unhandled_signals,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec
|
|
},
|
|
#endif
|
|
#if defined(CONFIG_OPTPROBES)
|
|
{
|
|
.procname = "kprobes-optimization",
|
|
.data = &sysctl_kprobes_optimization,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_kprobes_optimization_handler,
|
|
.extra1 = &zero,
|
|
.extra2 = &one,
|
|
},
|
|
#endif
|
|
{ }
|
|
};
|
|
|
|
static struct ctl_table dev_table[] = {
|
|
{ }
|
|
};
|
|
|
|
int __init sysctl_init(void)
|
|
{
|
|
struct ctl_table_header *hdr;
|
|
|
|
hdr = register_sysctl_table(sysctl_base_table);
|
|
kmemleak_not_leak(hdr);
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_SYSCTL */
|
|
|
|
/*
|
|
* /proc/sys support
|
|
*/
|
|
|
|
#ifdef CONFIG_PROC_SYSCTL
|
|
|
|
static int _proc_do_string(void* data, int maxlen, int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
size_t len;
|
|
char __user *p;
|
|
char c;
|
|
|
|
if (!data || !maxlen || !*lenp) {
|
|
*lenp = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (write) {
|
|
len = 0;
|
|
p = buffer;
|
|
while (len < *lenp) {
|
|
if (get_user(c, p++))
|
|
return -EFAULT;
|
|
if (c == 0 || c == '\n')
|
|
break;
|
|
len++;
|
|
}
|
|
if (len >= maxlen)
|
|
len = maxlen-1;
|
|
if(copy_from_user(data, buffer, len))
|
|
return -EFAULT;
|
|
((char *) data)[len] = 0;
|
|
*ppos += *lenp;
|
|
} else {
|
|
len = strlen(data);
|
|
if (len > maxlen)
|
|
len = maxlen;
|
|
|
|
if (*ppos > len) {
|
|
*lenp = 0;
|
|
return 0;
|
|
}
|
|
|
|
data += *ppos;
|
|
len -= *ppos;
|
|
|
|
if (len > *lenp)
|
|
len = *lenp;
|
|
if (len)
|
|
if(copy_to_user(buffer, data, len))
|
|
return -EFAULT;
|
|
if (len < *lenp) {
|
|
if(put_user('\n', ((char __user *) buffer) + len))
|
|
return -EFAULT;
|
|
len++;
|
|
}
|
|
*lenp = len;
|
|
*ppos += len;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* proc_dostring - read a string sysctl
|
|
* @table: the sysctl table
|
|
* @write: %TRUE if this is a write to the sysctl file
|
|
* @buffer: the user buffer
|
|
* @lenp: the size of the user buffer
|
|
* @ppos: file position
|
|
*
|
|
* Reads/writes a string from/to the user buffer. If the kernel
|
|
* buffer provided is not large enough to hold the string, the
|
|
* string is truncated. The copied string is %NULL-terminated.
|
|
* If the string is being read by the user process, it is copied
|
|
* and a newline '\n' is added. It is truncated if the buffer is
|
|
* not large enough.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int proc_dostring(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return _proc_do_string(table->data, table->maxlen, write,
|
|
buffer, lenp, ppos);
|
|
}
|
|
|
|
static size_t proc_skip_spaces(char **buf)
|
|
{
|
|
size_t ret;
|
|
char *tmp = skip_spaces(*buf);
|
|
ret = tmp - *buf;
|
|
*buf = tmp;
|
|
return ret;
|
|
}
|
|
|
|
static void proc_skip_char(char **buf, size_t *size, const char v)
|
|
{
|
|
while (*size) {
|
|
if (**buf != v)
|
|
break;
|
|
(*size)--;
|
|
(*buf)++;
|
|
}
|
|
}
|
|
|
|
#define TMPBUFLEN 22
|
|
/**
|
|
* proc_get_long - reads an ASCII formatted integer from a user buffer
|
|
*
|
|
* @buf: a kernel buffer
|
|
* @size: size of the kernel buffer
|
|
* @val: this is where the number will be stored
|
|
* @neg: set to %TRUE if number is negative
|
|
* @perm_tr: a vector which contains the allowed trailers
|
|
* @perm_tr_len: size of the perm_tr vector
|
|
* @tr: pointer to store the trailer character
|
|
*
|
|
* In case of success %0 is returned and @buf and @size are updated with
|
|
* the amount of bytes read. If @tr is non-NULL and a trailing
|
|
* character exists (size is non-zero after returning from this
|
|
* function), @tr is updated with the trailing character.
|
|
*/
|
|
static int proc_get_long(char **buf, size_t *size,
|
|
unsigned long *val, bool *neg,
|
|
const char *perm_tr, unsigned perm_tr_len, char *tr)
|
|
{
|
|
int len;
|
|
char *p, tmp[TMPBUFLEN];
|
|
|
|
if (!*size)
|
|
return -EINVAL;
|
|
|
|
len = *size;
|
|
if (len > TMPBUFLEN - 1)
|
|
len = TMPBUFLEN - 1;
|
|
|
|
memcpy(tmp, *buf, len);
|
|
|
|
tmp[len] = 0;
|
|
p = tmp;
|
|
if (*p == '-' && *size > 1) {
|
|
*neg = true;
|
|
p++;
|
|
} else
|
|
*neg = false;
|
|
if (!isdigit(*p))
|
|
return -EINVAL;
|
|
|
|
*val = simple_strtoul(p, &p, 0);
|
|
|
|
len = p - tmp;
|
|
|
|
/* We don't know if the next char is whitespace thus we may accept
|
|
* invalid integers (e.g. 1234...a) or two integers instead of one
|
|
* (e.g. 123...1). So lets not allow such large numbers. */
|
|
if (len == TMPBUFLEN - 1)
|
|
return -EINVAL;
|
|
|
|
if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len))
|
|
return -EINVAL;
|
|
|
|
if (tr && (len < *size))
|
|
*tr = *p;
|
|
|
|
*buf += len;
|
|
*size -= len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* proc_put_long - converts an integer to a decimal ASCII formatted string
|
|
*
|
|
* @buf: the user buffer
|
|
* @size: the size of the user buffer
|
|
* @val: the integer to be converted
|
|
* @neg: sign of the number, %TRUE for negative
|
|
*
|
|
* In case of success %0 is returned and @buf and @size are updated with
|
|
* the amount of bytes written.
|
|
*/
|
|
static int proc_put_long(void __user **buf, size_t *size, unsigned long val,
|
|
bool neg)
|
|
{
|
|
int len;
|
|
char tmp[TMPBUFLEN], *p = tmp;
|
|
|
|
sprintf(p, "%s%lu", neg ? "-" : "", val);
|
|
len = strlen(tmp);
|
|
if (len > *size)
|
|
len = *size;
|
|
if (copy_to_user(*buf, tmp, len))
|
|
return -EFAULT;
|
|
*size -= len;
|
|
*buf += len;
|
|
return 0;
|
|
}
|
|
#undef TMPBUFLEN
|
|
|
|
static int proc_put_char(void __user **buf, size_t *size, char c)
|
|
{
|
|
if (*size) {
|
|
char __user **buffer = (char __user **)buf;
|
|
if (put_user(c, *buffer))
|
|
return -EFAULT;
|
|
(*size)--, (*buffer)++;
|
|
*buf = *buffer;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
|
|
int *valp,
|
|
int write, void *data)
|
|
{
|
|
if (write) {
|
|
*valp = *negp ? -*lvalp : *lvalp;
|
|
} else {
|
|
int val = *valp;
|
|
if (val < 0) {
|
|
*negp = true;
|
|
*lvalp = (unsigned long)-val;
|
|
} else {
|
|
*negp = false;
|
|
*lvalp = (unsigned long)val;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const char proc_wspace_sep[] = { ' ', '\t', '\n' };
|
|
|
|
static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
|
|
int write, void __user *buffer,
|
|
size_t *lenp, loff_t *ppos,
|
|
int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
|
|
int write, void *data),
|
|
void *data)
|
|
{
|
|
int *i, vleft, first = 1, err = 0;
|
|
unsigned long page = 0;
|
|
size_t left;
|
|
char *kbuf;
|
|
|
|
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 (left > PAGE_SIZE - 1)
|
|
left = PAGE_SIZE - 1;
|
|
page = __get_free_page(GFP_TEMPORARY);
|
|
kbuf = (char *) page;
|
|
if (!kbuf)
|
|
return -ENOMEM;
|
|
if (copy_from_user(kbuf, buffer, left)) {
|
|
err = -EFAULT;
|
|
goto free;
|
|
}
|
|
kbuf[left] = 0;
|
|
}
|
|
|
|
for (; left && vleft--; i++, first=0) {
|
|
unsigned long lval;
|
|
bool neg;
|
|
|
|
if (write) {
|
|
left -= proc_skip_spaces(&kbuf);
|
|
|
|
if (!left)
|
|
break;
|
|
err = proc_get_long(&kbuf, &left, &lval, &neg,
|
|
proc_wspace_sep,
|
|
sizeof(proc_wspace_sep), NULL);
|
|
if (err)
|
|
break;
|
|
if (conv(&neg, &lval, i, 1, data)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
} else {
|
|
if (conv(&neg, &lval, i, 0, data)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
if (!first)
|
|
err = proc_put_char(&buffer, &left, '\t');
|
|
if (err)
|
|
break;
|
|
err = proc_put_long(&buffer, &left, lval, neg);
|
|
if (err)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!write && !first && left && !err)
|
|
err = proc_put_char(&buffer, &left, '\n');
|
|
if (write && !err && left)
|
|
left -= proc_skip_spaces(&kbuf);
|
|
free:
|
|
if (write) {
|
|
free_page(page);
|
|
if (first)
|
|
return err ? : -EINVAL;
|
|
}
|
|
*lenp -= left;
|
|
*ppos += *lenp;
|
|
return err;
|
|
}
|
|
|
|
static int do_proc_dointvec(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos,
|
|
int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
|
|
int write, void *data),
|
|
void *data)
|
|
{
|
|
return __do_proc_dointvec(table->data, table, write,
|
|
buffer, lenp, ppos, conv, data);
|
|
}
|
|
|
|
/**
|
|
* proc_dointvec - read a vector of integers
|
|
* @table: the sysctl table
|
|
* @write: %TRUE if this is a write to the sysctl file
|
|
* @buffer: the user buffer
|
|
* @lenp: the size of the user buffer
|
|
* @ppos: file position
|
|
*
|
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer
|
|
* values from/to the user buffer, treated as an ASCII string.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int proc_dointvec(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return do_proc_dointvec(table,write,buffer,lenp,ppos,
|
|
NULL,NULL);
|
|
}
|
|
|
|
/*
|
|
* Taint values can only be increased
|
|
* This means we can safely use a temporary.
|
|
*/
|
|
static int proc_taint(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct ctl_table t;
|
|
unsigned long tmptaint = get_taint();
|
|
int err;
|
|
|
|
if (write && !capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
t = *table;
|
|
t.data = &tmptaint;
|
|
err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (write) {
|
|
/*
|
|
* Poor man's atomic or. Not worth adding a primitive
|
|
* to everyone's atomic.h for this
|
|
*/
|
|
int i;
|
|
for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) {
|
|
if ((tmptaint >> i) & 1)
|
|
add_taint(i, LOCKDEP_STILL_OK);
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_PRINTK
|
|
static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
if (write && !capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
return proc_dointvec_minmax(table, write, buffer, lenp, ppos);
|
|
}
|
|
#endif
|
|
|
|
struct do_proc_dointvec_minmax_conv_param {
|
|
int *min;
|
|
int *max;
|
|
};
|
|
|
|
static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp,
|
|
int *valp,
|
|
int write, void *data)
|
|
{
|
|
struct do_proc_dointvec_minmax_conv_param *param = data;
|
|
if (write) {
|
|
int val = *negp ? -*lvalp : *lvalp;
|
|
if ((param->min && *param->min > val) ||
|
|
(param->max && *param->max < val))
|
|
return -EINVAL;
|
|
*valp = val;
|
|
} else {
|
|
int val = *valp;
|
|
if (val < 0) {
|
|
*negp = true;
|
|
*lvalp = (unsigned long)-val;
|
|
} else {
|
|
*negp = false;
|
|
*lvalp = (unsigned long)val;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* proc_dointvec_minmax - read a vector of integers with min/max values
|
|
* @table: the sysctl table
|
|
* @write: %TRUE if this is a write to the sysctl file
|
|
* @buffer: the user buffer
|
|
* @lenp: the size of the user buffer
|
|
* @ppos: file position
|
|
*
|
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer
|
|
* values from/to the user buffer, treated as an ASCII string.
|
|
*
|
|
* This routine will ensure the values are within the range specified by
|
|
* table->extra1 (min) and table->extra2 (max).
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int proc_dointvec_minmax(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct do_proc_dointvec_minmax_conv_param param = {
|
|
.min = (int *) table->extra1,
|
|
.max = (int *) table->extra2,
|
|
};
|
|
return do_proc_dointvec(table, write, buffer, lenp, ppos,
|
|
do_proc_dointvec_minmax_conv, ¶m);
|
|
}
|
|
|
|
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 "\
|
|
"suid_dumpable=2. Pipe handler or fully qualified "\
|
|
"core dump path required.\n");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
|
|
if (!error)
|
|
validate_coredump_safety();
|
|
return error;
|
|
}
|
|
|
|
#ifdef CONFIG_COREDUMP
|
|
static int proc_dostring_coredump(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
int error = proc_dostring(table, write, buffer, lenp, ppos);
|
|
if (!error)
|
|
validate_coredump_safety();
|
|
return error;
|
|
}
|
|
#endif
|
|
|
|
static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos,
|
|
unsigned long convmul,
|
|
unsigned long convdiv)
|
|
{
|
|
unsigned long *i, *min, *max;
|
|
int vleft, first = 1, err = 0;
|
|
unsigned long page = 0;
|
|
size_t left;
|
|
char *kbuf;
|
|
|
|
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 (left > PAGE_SIZE - 1)
|
|
left = PAGE_SIZE - 1;
|
|
page = __get_free_page(GFP_TEMPORARY);
|
|
kbuf = (char *) page;
|
|
if (!kbuf)
|
|
return -ENOMEM;
|
|
if (copy_from_user(kbuf, buffer, left)) {
|
|
err = -EFAULT;
|
|
goto free;
|
|
}
|
|
kbuf[left] = 0;
|
|
}
|
|
|
|
for (; left && vleft--; i++, first = 0) {
|
|
unsigned long val;
|
|
|
|
if (write) {
|
|
bool neg;
|
|
|
|
left -= proc_skip_spaces(&kbuf);
|
|
|
|
err = proc_get_long(&kbuf, &left, &val, &neg,
|
|
proc_wspace_sep,
|
|
sizeof(proc_wspace_sep), NULL);
|
|
if (err)
|
|
break;
|
|
if (neg)
|
|
continue;
|
|
if ((min && val < *min) || (max && val > *max))
|
|
continue;
|
|
*i = val;
|
|
} else {
|
|
val = convdiv * (*i) / convmul;
|
|
if (!first)
|
|
err = proc_put_char(&buffer, &left, '\t');
|
|
err = proc_put_long(&buffer, &left, val, false);
|
|
if (err)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!write && !first && left && !err)
|
|
err = proc_put_char(&buffer, &left, '\n');
|
|
if (write && !err)
|
|
left -= proc_skip_spaces(&kbuf);
|
|
free:
|
|
if (write) {
|
|
free_page(page);
|
|
if (first)
|
|
return err ? : -EINVAL;
|
|
}
|
|
*lenp -= left;
|
|
*ppos += *lenp;
|
|
return err;
|
|
}
|
|
|
|
static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos,
|
|
unsigned long convmul,
|
|
unsigned long convdiv)
|
|
{
|
|
return __do_proc_doulongvec_minmax(table->data, table, write,
|
|
buffer, lenp, ppos, convmul, convdiv);
|
|
}
|
|
|
|
/**
|
|
* proc_doulongvec_minmax - read a vector of long integers with min/max values
|
|
* @table: the sysctl table
|
|
* @write: %TRUE if this is a write to the sysctl file
|
|
* @buffer: the user buffer
|
|
* @lenp: the size of the user buffer
|
|
* @ppos: file position
|
|
*
|
|
* Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
|
|
* values from/to the user buffer, treated as an ASCII string.
|
|
*
|
|
* This routine will ensure the values are within the range specified by
|
|
* table->extra1 (min) and table->extra2 (max).
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int proc_doulongvec_minmax(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l);
|
|
}
|
|
|
|
/**
|
|
* proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
|
|
* @table: the sysctl table
|
|
* @write: %TRUE if this is a write to the sysctl file
|
|
* @buffer: the user buffer
|
|
* @lenp: the size of the user buffer
|
|
* @ppos: file position
|
|
*
|
|
* Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
|
|
* values from/to the user buffer, treated as an ASCII string. The values
|
|
* are treated as milliseconds, and converted to jiffies when they are stored.
|
|
*
|
|
* This routine will ensure the values are within the range specified by
|
|
* table->extra1 (min) and table->extra2 (max).
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
return do_proc_doulongvec_minmax(table, write, buffer,
|
|
lenp, ppos, HZ, 1000l);
|
|
}
|
|
|
|
|
|
static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp,
|
|
int *valp,
|
|
int write, void *data)
|
|
{
|
|
if (write) {
|
|
if (*lvalp > LONG_MAX / HZ)
|
|
return 1;
|
|
*valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
|
|
} else {
|
|
int val = *valp;
|
|
unsigned long lval;
|
|
if (val < 0) {
|
|
*negp = true;
|
|
lval = (unsigned long)-val;
|
|
} else {
|
|
*negp = false;
|
|
lval = (unsigned long)val;
|
|
}
|
|
*lvalp = lval / HZ;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp,
|
|
int *valp,
|
|
int write, void *data)
|
|
{
|
|
if (write) {
|
|
if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
|
|
return 1;
|
|
*valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
|
|
} else {
|
|
int val = *valp;
|
|
unsigned long lval;
|
|
if (val < 0) {
|
|
*negp = true;
|
|
lval = (unsigned long)-val;
|
|
} else {
|
|
*negp = false;
|
|
lval = (unsigned long)val;
|
|
}
|
|
*lvalp = jiffies_to_clock_t(lval);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp,
|
|
int *valp,
|
|
int write, void *data)
|
|
{
|
|
if (write) {
|
|
unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
|
|
|
|
if (jif > INT_MAX)
|
|
return 1;
|
|
*valp = (int)jif;
|
|
} else {
|
|
int val = *valp;
|
|
unsigned long lval;
|
|
if (val < 0) {
|
|
*negp = true;
|
|
lval = (unsigned long)-val;
|
|
} else {
|
|
*negp = false;
|
|
lval = (unsigned long)val;
|
|
}
|
|
*lvalp = jiffies_to_msecs(lval);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* proc_dointvec_jiffies - read a vector of integers as seconds
|
|
* @table: the sysctl table
|
|
* @write: %TRUE if this is a write to the sysctl file
|
|
* @buffer: the user buffer
|
|
* @lenp: the size of the user buffer
|
|
* @ppos: file position
|
|
*
|
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer
|
|
* values from/to the user buffer, treated as an ASCII string.
|
|
* The values read are assumed to be in seconds, and are converted into
|
|
* jiffies.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int proc_dointvec_jiffies(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return do_proc_dointvec(table,write,buffer,lenp,ppos,
|
|
do_proc_dointvec_jiffies_conv,NULL);
|
|
}
|
|
|
|
/**
|
|
* proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
|
|
* @table: the sysctl table
|
|
* @write: %TRUE if this is a write to the sysctl file
|
|
* @buffer: the user buffer
|
|
* @lenp: the size of the user buffer
|
|
* @ppos: pointer to the file position
|
|
*
|
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer
|
|
* values from/to the user buffer, treated as an ASCII string.
|
|
* The values read are assumed to be in 1/USER_HZ seconds, and
|
|
* are converted into jiffies.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return do_proc_dointvec(table,write,buffer,lenp,ppos,
|
|
do_proc_dointvec_userhz_jiffies_conv,NULL);
|
|
}
|
|
|
|
/**
|
|
* proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
|
|
* @table: the sysctl table
|
|
* @write: %TRUE if this is a write to the sysctl file
|
|
* @buffer: the user buffer
|
|
* @lenp: the size of the user buffer
|
|
* @ppos: file position
|
|
* @ppos: the current position in the file
|
|
*
|
|
* Reads/writes up to table->maxlen/sizeof(unsigned int) integer
|
|
* values from/to the user buffer, treated as an ASCII string.
|
|
* The values read are assumed to be in 1/1000 seconds, and
|
|
* are converted into jiffies.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return do_proc_dointvec(table, write, buffer, lenp, ppos,
|
|
do_proc_dointvec_ms_jiffies_conv, NULL);
|
|
}
|
|
|
|
static int proc_do_cad_pid(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct pid *new_pid;
|
|
pid_t tmp;
|
|
int r;
|
|
|
|
tmp = pid_vnr(cad_pid);
|
|
|
|
r = __do_proc_dointvec(&tmp, table, write, buffer,
|
|
lenp, ppos, NULL, NULL);
|
|
if (r || !write)
|
|
return r;
|
|
|
|
new_pid = find_get_pid(tmp);
|
|
if (!new_pid)
|
|
return -ESRCH;
|
|
|
|
put_pid(xchg(&cad_pid, new_pid));
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* proc_do_large_bitmap - read/write from/to a large bitmap
|
|
* @table: the sysctl table
|
|
* @write: %TRUE if this is a write to the sysctl file
|
|
* @buffer: the user buffer
|
|
* @lenp: the size of the user buffer
|
|
* @ppos: file position
|
|
*
|
|
* The bitmap is stored at table->data and the bitmap length (in bits)
|
|
* in table->maxlen.
|
|
*
|
|
* We use a range comma separated format (e.g. 1,3-4,10-10) so that
|
|
* large bitmaps may be represented in a compact manner. Writing into
|
|
* the file will clear the bitmap then update it with the given input.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int proc_do_large_bitmap(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
int err = 0;
|
|
bool first = 1;
|
|
size_t left = *lenp;
|
|
unsigned long bitmap_len = table->maxlen;
|
|
unsigned long *bitmap = (unsigned long *) table->data;
|
|
unsigned long *tmp_bitmap = NULL;
|
|
char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c;
|
|
|
|
if (!bitmap_len || !left || (*ppos && !write)) {
|
|
*lenp = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (write) {
|
|
unsigned long page = 0;
|
|
char *kbuf;
|
|
|
|
if (left > PAGE_SIZE - 1)
|
|
left = PAGE_SIZE - 1;
|
|
|
|
page = __get_free_page(GFP_TEMPORARY);
|
|
kbuf = (char *) page;
|
|
if (!kbuf)
|
|
return -ENOMEM;
|
|
if (copy_from_user(kbuf, buffer, left)) {
|
|
free_page(page);
|
|
return -EFAULT;
|
|
}
|
|
kbuf[left] = 0;
|
|
|
|
tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long),
|
|
GFP_KERNEL);
|
|
if (!tmp_bitmap) {
|
|
free_page(page);
|
|
return -ENOMEM;
|
|
}
|
|
proc_skip_char(&kbuf, &left, '\n');
|
|
while (!err && left) {
|
|
unsigned long val_a, val_b;
|
|
bool neg;
|
|
|
|
err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a,
|
|
sizeof(tr_a), &c);
|
|
if (err)
|
|
break;
|
|
if (val_a >= bitmap_len || neg) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
val_b = val_a;
|
|
if (left) {
|
|
kbuf++;
|
|
left--;
|
|
}
|
|
|
|
if (c == '-') {
|
|
err = proc_get_long(&kbuf, &left, &val_b,
|
|
&neg, tr_b, sizeof(tr_b),
|
|
&c);
|
|
if (err)
|
|
break;
|
|
if (val_b >= bitmap_len || neg ||
|
|
val_a > val_b) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
if (left) {
|
|
kbuf++;
|
|
left--;
|
|
}
|
|
}
|
|
|
|
bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
|
|
first = 0;
|
|
proc_skip_char(&kbuf, &left, '\n');
|
|
}
|
|
free_page(page);
|
|
} else {
|
|
unsigned long bit_a, bit_b = 0;
|
|
|
|
while (left) {
|
|
bit_a = find_next_bit(bitmap, bitmap_len, bit_b);
|
|
if (bit_a >= bitmap_len)
|
|
break;
|
|
bit_b = find_next_zero_bit(bitmap, bitmap_len,
|
|
bit_a + 1) - 1;
|
|
|
|
if (!first) {
|
|
err = proc_put_char(&buffer, &left, ',');
|
|
if (err)
|
|
break;
|
|
}
|
|
err = proc_put_long(&buffer, &left, bit_a, false);
|
|
if (err)
|
|
break;
|
|
if (bit_a != bit_b) {
|
|
err = proc_put_char(&buffer, &left, '-');
|
|
if (err)
|
|
break;
|
|
err = proc_put_long(&buffer, &left, bit_b, false);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
first = 0; bit_b++;
|
|
}
|
|
if (!err)
|
|
err = proc_put_char(&buffer, &left, '\n');
|
|
}
|
|
|
|
if (!err) {
|
|
if (write) {
|
|
if (*ppos)
|
|
bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
|
|
else
|
|
bitmap_copy(bitmap, tmp_bitmap, bitmap_len);
|
|
}
|
|
kfree(tmp_bitmap);
|
|
*lenp -= left;
|
|
*ppos += *lenp;
|
|
return 0;
|
|
} else {
|
|
kfree(tmp_bitmap);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
#else /* CONFIG_PROC_SYSCTL */
|
|
|
|
int proc_dostring(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int proc_dointvec(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int proc_dointvec_minmax(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int proc_dointvec_jiffies(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int proc_doulongvec_minmax(struct ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
|
|
#endif /* CONFIG_PROC_SYSCTL */
|
|
|
|
/*
|
|
* No sense putting this after each symbol definition, twice,
|
|
* exception granted :-)
|
|
*/
|
|
EXPORT_SYMBOL(proc_dointvec);
|
|
EXPORT_SYMBOL(proc_dointvec_jiffies);
|
|
EXPORT_SYMBOL(proc_dointvec_minmax);
|
|
EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
|
|
EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
|
|
EXPORT_SYMBOL(proc_dostring);
|
|
EXPORT_SYMBOL(proc_doulongvec_minmax);
|
|
EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
|