#include <sys/cdefs.h>
#include "opt_capsicum.h"
#include "opt_ddb.h"
#include "opt_ktrace.h"
#include "opt_sysctl.h"
#include <sys/param.h>
#include <sys/fail.h>
#include <sys/systm.h>
#include <sys/capsicum.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/jail.h>
#include <sys/kdb.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/rmlock.h>
#include <sys/sbuf.h>
#include <sys/sx.h>
#include <sys/sysproto.h>
#include <sys/uio.h>
#include <net/vnet.h>
#include <security/mac/mac_framework.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>

Include dependency graph for kern_sysctl.c:

Data Structures
struct	__sysctl_args

struct	__sysctlbyname_args

Macros
#define	SYSCTL_WLOCK() rm_wlock(&sysctllock)

#define	SYSCTL_WUNLOCK() rm_wunlock(&sysctllock)

#define	SYSCTL_RLOCK(tracker) rm_rlock(&sysctllock, (tracker))

#define	SYSCTL_RUNLOCK(tracker) rm_runlock(&sysctllock, (tracker))

#define	SYSCTL_WLOCKED() rm_wowned(&sysctllock)

#define	SYSCTL_ASSERT_LOCKED() rm_assert(&sysctllock, RA_LOCKED)

#define	SYSCTL_ASSERT_WLOCKED() rm_assert(&sysctllock, RA_WLOCKED)

#define	SYSCTL_ASSERT_RLOCKED() rm_assert(&sysctllock, RA_RLOCKED)

#define	SYSCTL_INIT()

#define	SYSCTL_SLEEP(ch, wmesg, timo) rm_sleep(ch, &sysctllock, 0, wmesg, timo)

Enumerations
enum	sysctl_iter_action { ITER_SIBLINGS , ITER_CHILDREN , ITER_FOUND }

Functions
	__FBSDID ("$FreeBSD$")

static	MALLOC_DEFINE (M_SYSCTL, "sysctl", "sysctl internal magic")

static	MALLOC_DEFINE (M_SYSCTLOID, "sysctloid", "sysctl dynamic oids")

static	MALLOC_DEFINE (M_SYSCTLTMP, "sysctltmp", "sysctl temp output buffer")

static int	sysctl_root (SYSCTL_HANDLER_ARGS)

static char *	sysctl_escape_name (const char *)

static int	sysctl_remove_oid_locked (struct sysctl_oid *oidp, int del, int recurse)

static int	sysctl_old_kernel (struct sysctl_req , const void , size_t)

static int	sysctl_new_kernel (struct sysctl_req , void , size_t)

static struct sysctl_oid *	sysctl_find_oidname (const char name, struct sysctl_oid_list list)

void	sysctl_wlock (void)

void	sysctl_wunlock (void)

static int	sysctl_root_handler_locked (struct sysctl_oid oid, void arg1, intmax_t arg2, struct sysctl_req req, struct rm_priotracker tracker)

static void	sysctl_load_tunable_by_oid_locked (struct sysctl_oid *oidp)

static int	sysctl_search_oid (struct sysctl_oid *nodes, struct sysctl_oid needle)

static void	sysctl_warn_reuse (const char func, struct sysctl_oid leaf)

void	sysctl_register_oid (struct sysctl_oid *oidp)

void	sysctl_register_disabled_oid (struct sysctl_oid *oidp)

void	sysctl_enable_oid (struct sysctl_oid *oidp)

void	sysctl_unregister_oid (struct sysctl_oid *oidp)

int	sysctl_ctx_init (struct sysctl_ctx_list *c)

int	sysctl_ctx_free (struct sysctl_ctx_list *clist)

struct sysctl_ctx_entry *	sysctl_ctx_entry_add (struct sysctl_ctx_list clist, struct sysctl_oid oidp)

struct sysctl_ctx_entry *	sysctl_ctx_entry_find (struct sysctl_ctx_list clist, struct sysctl_oid oidp)

int	sysctl_ctx_entry_del (struct sysctl_ctx_list clist, struct sysctl_oid oidp)

int	sysctl_remove_oid (struct sysctl_oid *oidp, int del, int recurse)

int	sysctl_remove_name (struct sysctl_oid parent, const char name, int del, int recurse)

struct sysctl_oid *	sysctl_add_oid (struct sysctl_ctx_list clist, struct sysctl_oid_list parent, int number, const char name, int kind, void arg1, intmax_t arg2, int(handler)(SYSCTL_HANDLER_ARGS), const char fmt, const char descr, const char label)

void	sysctl_rename_oid (struct sysctl_oid oidp, const char name)

int	sysctl_move_oid (struct sysctl_oid oid, struct sysctl_oid_list parent)

	SET_DECLARE (sysctl_set, struct sysctl_oid)

static void	sysctl_register_all (void *arg)

	SYSINIT (sysctl, SI_SUB_KMEM, SI_ORDER_FIRST, sysctl_register_all, NULL)

static int	sysctl_sysctl_name (SYSCTL_HANDLER_ARGS)

static	SYSCTL_NODE (_sysctl, CTL_SYSCTL_NAME, name, CTLFLAG_RD\|CTLFLAG_MPSAFE\|CTLFLAG_CAPRD, sysctl_sysctl_name, "")

static enum sysctl_iter_action	sysctl_sysctl_next_node (struct sysctl_oid oidp, int name, unsigned int namelen, bool honor_skip)

static bool	sysctl_sysctl_next_action (struct sysctl_oid_list lsp, int name, u_int namelen, int next, int len, int level, bool honor_skip)

static int	sysctl_sysctl_next (SYSCTL_HANDLER_ARGS)

static	SYSCTL_NODE (_sysctl, CTL_SYSCTL_NEXT, next, CTLFLAG_RD\|CTLFLAG_MPSAFE\|CTLFLAG_CAPRD, sysctl_sysctl_next, "")

static	SYSCTL_NODE (_sysctl, CTL_SYSCTL_NEXTNOSKIP, nextnoskip, CTLFLAG_RD\|CTLFLAG_MPSAFE\|CTLFLAG_CAPRD, sysctl_sysctl_next, "")

static int	name2oid (char name, int oid, int len, struct sysctl_oid *oidpp)

static int	sysctl_sysctl_name2oid (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_sysctl, CTL_SYSCTL_NAME2OID, name2oid, CTLTYPE_INT\|CTLFLAG_RW\|CTLFLAG_ANYBODY\|CTLFLAG_MPSAFE\|CTLFLAG_CAPRW, 0, 0, sysctl_sysctl_name2oid, "I", "")

static int	sysctl_sysctl_oidfmt (SYSCTL_HANDLER_ARGS)

static	SYSCTL_NODE (_sysctl, CTL_SYSCTL_OIDFMT, oidfmt, CTLFLAG_RD\|CTLFLAG_MPSAFE\|CTLFLAG_CAPRD, sysctl_sysctl_oidfmt, "")

static int	sysctl_sysctl_oiddescr (SYSCTL_HANDLER_ARGS)

static	SYSCTL_NODE (_sysctl, CTL_SYSCTL_OIDDESCR, oiddescr, CTLFLAG_RD\|CTLFLAG_MPSAFE\|CTLFLAG_CAPRD, sysctl_sysctl_oiddescr, "")

static int	sysctl_sysctl_oidlabel (SYSCTL_HANDLER_ARGS)

static	SYSCTL_NODE (_sysctl, CTL_SYSCTL_OIDLABEL, oidlabel, CTLFLAG_RD\|CTLFLAG_MPSAFE\|CTLFLAG_CAPRD, sysctl_sysctl_oidlabel, "")

int	sysctl_handle_bool (SYSCTL_HANDLER_ARGS)

int	sysctl_handle_8 (SYSCTL_HANDLER_ARGS)

int	sysctl_handle_16 (SYSCTL_HANDLER_ARGS)

int	sysctl_handle_32 (SYSCTL_HANDLER_ARGS)

int	sysctl_handle_int (SYSCTL_HANDLER_ARGS)

int	sysctl_msec_to_ticks (SYSCTL_HANDLER_ARGS)

int	sysctl_handle_long (SYSCTL_HANDLER_ARGS)

int	sysctl_handle_64 (SYSCTL_HANDLER_ARGS)

int	sysctl_handle_string (SYSCTL_HANDLER_ARGS)

int	sysctl_handle_opaque (SYSCTL_HANDLER_ARGS)

int	sysctl_usec_to_sbintime (SYSCTL_HANDLER_ARGS)

int	sysctl_msec_to_sbintime (SYSCTL_HANDLER_ARGS)

int	sysctl_sec_to_timeval (SYSCTL_HANDLER_ARGS)

int	kernel_sysctl (struct thread td, int name, u_int namelen, void old, size_t oldlenp, void new, size_t newlen, size_t retval, int flags)

int	kernel_sysctlbyname (struct thread td, char name, void old, size_t oldlenp, void new, size_t newlen, size_t retval, int flags)

static int	sysctl_old_user (struct sysctl_req req, const void p, size_t l)

static int	sysctl_new_user (struct sysctl_req req, void p, size_t l)

int	sysctl_wire_old_buffer (struct sysctl_req *req, size_t len)

int	sysctl_find_oid (int name, u_int namelen, struct sysctl_oid noid, int nindx, struct sysctl_req *req)

int	sys___sysctl (struct thread td, struct __sysctl_args uap)

int	kern___sysctlbyname (struct thread td, const char oname, size_t namelen, void old, size_t oldlenp, void new, size_t newlen, size_t retval, int flags, bool inkernel)

int	sys___sysctlbyname (struct thread td, struct __sysctlbyname_args uap)

int	userland_sysctl (struct thread td, int name, u_int namelen, void old, size_t oldlenp, int inkernel, const void new, size_t newlen, size_t retval, int flags)

static int	sbuf_sysctl_drain (void arg, const char data, int len)

struct sbuf *	sbuf_new_for_sysctl (struct sbuf s, char buf, int length, struct sysctl_req *req)

Variables
static struct rmlock	sysctllock

static struct sx __exclusive_cache_line	sysctlmemlock

static struct sx	sysctlstringlock

struct sysctl_oid_list	sysctl__children = SLIST_HEAD_INITIALIZER(&sysctl__children)

Macro Definition Documentation

◆ SYSCTL_ASSERT_LOCKED

#define SYSCTL_ASSERT_LOCKED ( ) rm_assert(&sysctllock, RA_LOCKED)

Definition at line 112 of file kern_sysctl.c.

◆ SYSCTL_ASSERT_RLOCKED

#define SYSCTL_ASSERT_RLOCKED ( ) rm_assert(&sysctllock, RA_RLOCKED)

Definition at line 114 of file kern_sysctl.c.

◆ SYSCTL_ASSERT_WLOCKED

#define SYSCTL_ASSERT_WLOCKED ( ) rm_assert(&sysctllock, RA_WLOCKED)

Definition at line 113 of file kern_sysctl.c.

◆ SYSCTL_INIT

#define SYSCTL_INIT ( )

Value:

rm_init_flags(&sysctllock, "sysctl lock", \

RM_SLEEPABLE)

rm_init_flags

void rm_init_flags(struct rmlock *rm, const char *name, int opts)

Definition: kern_rmlock.c:280

sysctllock

static struct rmlock sysctllock

Definition: kern_sysctl.c:103

Definition at line 115 of file kern_sysctl.c.

◆ SYSCTL_RLOCK

#define SYSCTL_RLOCK ( tracker ) rm_rlock(&sysctllock, (tracker))

Definition at line 109 of file kern_sysctl.c.

◆ SYSCTL_RUNLOCK

#define SYSCTL_RUNLOCK ( tracker ) rm_runlock(&sysctllock, (tracker))

Definition at line 110 of file kern_sysctl.c.

◆ SYSCTL_SLEEP

#define SYSCTL_SLEEP	(	ch,
		wmesg,
		timo
	)	rm_sleep(ch, &sysctllock, 0, wmesg, timo)

Definition at line 117 of file kern_sysctl.c.

◆ SYSCTL_WLOCK

#define SYSCTL_WLOCK ( ) rm_wlock(&sysctllock)

Definition at line 107 of file kern_sysctl.c.

◆ SYSCTL_WLOCKED

#define SYSCTL_WLOCKED ( ) rm_wowned(&sysctllock)

Definition at line 111 of file kern_sysctl.c.

◆ SYSCTL_WUNLOCK

#define SYSCTL_WUNLOCK ( ) rm_wunlock(&sysctllock)

Definition at line 108 of file kern_sysctl.c.

Enumeration Type Documentation

◆ sysctl_iter_action

enum sysctl_iter_action

Enumerator
ITER_SIBLINGS
ITER_CHILDREN
ITER_FOUND

Definition at line 1147 of file kern_sysctl.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ kern___sysctlbyname()

int kern___sysctlbyname	(	struct thread *	td,
		const char *	oname,
		size_t	namelen,
		void *	old,
		size_t *	oldlenp,
		void *	new,
		size_t	newlen,
		size_t *	retval,
		int	flags,
		bool	inkernel
	)

Definition at line 2349 of file kern_sysctl.c.

References flags, free(), kernel_sysctl(), malloc(), name, and userland_sysctl().

Referenced by sys___sysctlbyname().

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◆ kernel_sysctl()

int kernel_sysctl	(	struct thread *	td,
		int *	name,
		u_int	namelen,
		void *	old,
		size_t *	oldlenp,
		void *	new,
		size_t	newlen,
		size_t *	retval,
		int	flags
	)

Definition at line 2006 of file kern_sysctl.c.

References flags, name, sysctl_new_kernel(), sysctl_old_kernel(), and sysctl_root().

Referenced by kern___sysctlbyname(), and kernel_sysctlbyname().

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◆ kernel_sysctlbyname()

int kernel_sysctlbyname	(	struct thread *	td,
		char *	name,
		void *	old,
		size_t *	oldlenp,
		void *	new,
		size_t	newlen,
		size_t *	retval,
		int	flags
	)

Definition at line 2053 of file kern_sysctl.c.

References flags, kernel_sysctl(), and name.

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◆ MALLOC_DEFINE() [1/3]

static MALLOC_DEFINE	(	M_SYSCTL	,
		"sysctl"	,
		"sysctl internal magic"
	)

static

◆ MALLOC_DEFINE() [2/3]

static MALLOC_DEFINE	(	M_SYSCTLOID	,
		"sysctloid"	,
		"sysctl dynamic oids"
	)

static

◆ MALLOC_DEFINE() [3/3]

static MALLOC_DEFINE	(	M_SYSCTLTMP	,
		"sysctltmp"	,
		"sysctl temp output buffer"
	)

static

◆ name2oid()

static int name2oid	(	char *	name,
		int *	oid,
		int *	len,
		struct sysctl_oid **	oidpp
	)

static

Definition at line 1324 of file kern_sysctl.c.

References name, sysctl__children, and SYSCTL_ASSERT_LOCKED.

Referenced by sysctl_sysctl_name2oid().

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◆ sbuf_new_for_sysctl()

struct sbuf * sbuf_new_for_sysctl	(	struct sbuf *	s,
		char *	buf,
		int	length,
		struct sysctl_req *	req
	)

Definition at line 2503 of file kern_sysctl.c.

References buf, sbuf_new(), sbuf_set_drain(), and sbuf_sysctl_drain().

Referenced by device_sysctl_handler(), dumpdevname_sysctl_handler(), kdb_sysctl_available(), sysctl_debug_tslog(), sysctl_debug_tslog_user(), sysctl_debug_witness_fullgraph(), sysctl_kern_malloc_stats(), sysctl_kern_proc_args(), sysctl_kern_proc_auxv(), sysctl_kern_proc_cwd(), sysctl_kern_proc_env(), sysctl_kern_proc_filedesc(), sysctl_kern_proc_vmmap(), sysctl_kern_timecounter_choice(), sysctl_out_proc(), sysctl_posix_shm_list(), and sysctl_preload_dump().

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◆ sbuf_sysctl_drain()

static int sbuf_sysctl_drain	(	void *	arg,
		const char *	data,
		int	len
	)

static

Definition at line 2492 of file kern_sysctl.c.

References data.

Referenced by sbuf_new_for_sysctl().

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◆ SET_DECLARE()

SET_DECLARE	(	sysctl_set	,
		struct sysctl_oid
	)

◆ sys___sysctl()

int sys___sysctl	(	struct thread *	td,
		struct __sysctl_args *	uap
	)

Definition at line 2323 of file kern_sysctl.c.

References name, __sysctl_args::name, __sysctl_args::namelen, __sysctl_args::new, __sysctl_args::newlen, __sysctl_args::old, __sysctl_args::oldlenp, and userland_sysctl().

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◆ sys___sysctlbyname()

int sys___sysctlbyname	(	struct thread *	td,
		struct __sysctlbyname_args *	uap
	)

Definition at line 2395 of file kern_sysctl.c.

References kern___sysctlbyname(), __sysctlbyname_args::name, __sysctlbyname_args::namelen, __sysctlbyname_args::new, __sysctlbyname_args::newlen, __sysctlbyname_args::old, and __sysctlbyname_args::oldlenp.

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◆ sysctl_add_oid()

struct sysctl_oid * sysctl_add_oid	(	struct sysctl_ctx_list *	clist,
		struct sysctl_oid_list *	parent,
		int	number,
		const char *	name,
		int	kind,
		void *	arg1,
		intmax_t	arg2,
		int(*)(SYSCTL_HANDLER_ARGS)	handler,
		const char *	fmt,
		const char *	descr,
		const char *	label
	)

Definition at line 866 of file kern_sysctl.c.

References free(), malloc(), name, parent, sysctl_ctx_entry_add(), sysctl_escape_name(), sysctl_find_oidname(), sysctl_register_oid(), sysctl_warn_reuse(), SYSCTL_WLOCK, and SYSCTL_WUNLOCK.

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◆ sysctl_ctx_entry_add()

struct sysctl_ctx_entry * sysctl_ctx_entry_add	(	struct sysctl_ctx_list *	clist,
		struct sysctl_oid *	oidp
	)

Definition at line 660 of file kern_sysctl.c.

References malloc(), and SYSCTL_ASSERT_WLOCKED.

Referenced by sysctl_add_oid().

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◆ sysctl_ctx_entry_del()

int sysctl_ctx_entry_del	(	struct sysctl_ctx_list *	clist,
		struct sysctl_oid *	oidp
	)

Definition at line 695 of file kern_sysctl.c.

References free(), sysctl_ctx_entry_find(), SYSCTL_WLOCK, and SYSCTL_WUNLOCK.

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◆ sysctl_ctx_entry_find()

struct sysctl_ctx_entry * sysctl_ctx_entry_find	(	struct sysctl_ctx_list *	clist,
		struct sysctl_oid *	oidp
	)

Definition at line 675 of file kern_sysctl.c.

References SYSCTL_ASSERT_WLOCKED.

Referenced by sysctl_ctx_entry_del().

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◆ sysctl_ctx_free()

int sysctl_ctx_free ( struct sysctl_ctx_list * clist )

Definition at line 608 of file kern_sysctl.c.

References free(), panic(), sysctl_register_oid(), sysctl_remove_oid_locked(), SYSCTL_WLOCK, and SYSCTL_WUNLOCK.

Referenced by alloc_bounce_zone(), cpufreq_detach(), and device_sysctl_fini().

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◆ sysctl_ctx_init()

int sysctl_ctx_init ( struct sysctl_ctx_list * c )

Definition at line 590 of file kern_sysctl.c.

Referenced by alloc_bounce_zone(), cpufreq_attach(), devclass_sysctl_init(), and device_sysctl_init().

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◆ sysctl_enable_oid()

void sysctl_enable_oid ( struct sysctl_oid * oidp )

Definition at line 542 of file kern_sysctl.c.

References SYSCTL_ASSERT_WLOCKED.

Referenced by linker_file_enable_sysctls().

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◆ sysctl_escape_name()

static char * sysctl_escape_name ( const char * orig )

static

Definition at line 758 of file kern_sysctl.c.

References malloc().

Referenced by sysctl_add_oid().

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◆ sysctl_find_oid()

int sysctl_find_oid	(	int *	name,
		u_int	namelen,
		struct sysctl_oid **	noid,
		int *	nindx,
		struct sysctl_req *	req
	)

Definition at line 2160 of file kern_sysctl.c.

References name, sysctl__children, and SYSCTL_ASSERT_LOCKED.

Referenced by sysctl_root(), sysctl_sysctl_oiddescr(), sysctl_sysctl_oidfmt(), and sysctl_sysctl_oidlabel().

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◆ sysctl_find_oidname()

static struct sysctl_oid * sysctl_find_oidname	(	const char *	name,
		struct sysctl_oid_list *	list
	)

static

Definition at line 132 of file kern_sysctl.c.

References name, and SYSCTL_ASSERT_LOCKED.

Referenced by sysctl_add_oid(), sysctl_move_oid(), and sysctl_register_oid().

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◆ sysctl_handle_16()

int sysctl_handle_16 ( SYSCTL_HANDLER_ARGS )

Definition at line 1580 of file kern_sysctl.c.

◆ sysctl_handle_32()

int sysctl_handle_32 ( SYSCTL_HANDLER_ARGS )

Definition at line 1612 of file kern_sysctl.c.

◆ sysctl_handle_64()

int sysctl_handle_64 ( SYSCTL_HANDLER_ARGS )

Definition at line 1746 of file kern_sysctl.c.

Referenced by sysctl_debug_ktr_mask(), sysctl_kern_timecounter_freq(), sysctl_msec_to_sbintime(), and sysctl_usec_to_sbintime().

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◆ sysctl_handle_8()

int sysctl_handle_8 ( SYSCTL_HANDLER_ARGS )

Definition at line 1548 of file kern_sysctl.c.

◆ sysctl_handle_bool()

int sysctl_handle_bool ( SYSCTL_HANDLER_ARGS )

Definition at line 1513 of file kern_sysctl.c.

◆ sysctl_handle_int()

int sysctl_handle_int ( SYSCTL_HANDLER_ARGS )

Definition at line 1644 of file kern_sysctl.c.

Referenced by cpufreq_curr_sysctl(), kdb_sysctl_enter(), kdb_sysctl_panic(), kdb_sysctl_stack_overflow(), kdb_sysctl_trap(), kdb_sysctl_trap_code(), p31b_sysctl_proc(), poll_burst_max_sysctl(), poll_each_burst_sysctl(), reg_frac_sysctl(), syscal_vfs_cache_fast_lookup(), sysctl_bufdomain_int(), sysctl_clock_do_io(), sysctl_compress_user_cores(), sysctl_debug_ktr_clear(), sysctl_debug_ktr_entries(), sysctl_debug_num_cores_check(), sysctl_debug_witness_watch(), sysctl_devctl_queue(), sysctl_fast_gettime(), sysctl_ftry_reclaim_vnode(), sysctl_jail_default_allow(), sysctl_jail_default_level(), sysctl_kern_callout_stat(), sysctl_kern_eventtimer_periodic(), sysctl_kern_msgbuf_clear(), sysctl_kern_pid_max(), sysctl_kern_quantum(), sysctl_kern_randompid(), sysctl_kern_securelvl(), sysctl_kern_suser_enabled(), sysctl_kern_timecounter_adjprecision(), sysctl_kern_timecounter_get(), sysctl_machdep_adjkerntz(), sysctl_maxsockets(), sysctl_mb_use_ext_pgs(), sysctl_msec_to_ticks(), sysctl_negminpct(), sysctl_nmbclusters(), sysctl_nmbjumbo16(), sysctl_nmbjumbo9(), sysctl_nmbjumbop(), sysctl_nmbufs(), sysctl_numdirtybuffers(), sysctl_resettodr_period(), sysctl_sec_to_timeval(), sysctl_somaxconn(), sysctl_unprivileged_proc_debug(), and user_frac_sysctl().

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◆ sysctl_handle_long()

int sysctl_handle_long ( SYSCTL_HANDLER_ARGS )

Definition at line 1700 of file kern_sysctl.c.

Referenced by sysctl_bufdomain_long(), sysctl_bufspace(), sysctl_handle_pipe_mindirect(), sysctl_handle_sb_max(), sysctl_hostid(), sysctl_hw_physmem(), sysctl_hw_realmem(), sysctl_hw_usermem(), sysctl_kmem_map_free(), sysctl_kmem_map_size(), sysctl_maxvnodes(), sysctl_runningspace(), and sysctl_wantfreevnodes().

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◆ sysctl_handle_opaque()

int sysctl_handle_opaque ( SYSCTL_HANDLER_ARGS )

Definition at line 1867 of file kern_sysctl.c.

Referenced by ntp_sysctl(), sysctl_intrcnt(), sysctl_intrnames(), sysctl_kern_clockrate(), and sysctl_kern_msgbuf().

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◆ sysctl_handle_string()

int sysctl_handle_string ( SYSCTL_HANDLER_ARGS )

Definition at line 1778 of file kern_sysctl.c.

References free(), kdb_active, malloc(), sysctl_new_kernel(), and sysctlstringlock.

Referenced by _boottrace_sysctl(), cpufreq_levels_sysctl(), cpufreq_settings_sysctl(), kdb_sysctl_current(), kdb_sysctl_panic_str(), stats_tpl_list_available(), sysctl_debug_ktr_cpumask(), sysctl_debug_witness_channel(), sysctl_handle_domainset(), sysctl_hostname(), sysctl_jail_param(), sysctl_kern_console(), sysctl_kern_corefile(), sysctl_kern_eventtimer_timer(), sysctl_kern_proc_sv_name(), and sysctl_kern_timecounter_hardware().

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◆ sysctl_load_tunable_by_oid_locked()

static void sysctl_load_tunable_by_oid_locked ( struct sysctl_oid * oidp )

static

Definition at line 207 of file kern_sysctl.c.

References __aligned, data, freeenv(), getenv_array(), kern_getenv(), path, printf(), sysctl_new_kernel(), sysctl_old_kernel(), and sysctl_root_handler_locked().

Referenced by sysctl_register_oid().

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◆ sysctl_move_oid()

int sysctl_move_oid	(	struct sysctl_oid *	oid,
		struct sysctl_oid_list *	parent
	)

Definition at line 941 of file kern_sysctl.c.

References parent, sysctl_find_oidname(), sysctl_register_oid(), sysctl_unregister_oid(), SYSCTL_WLOCK, and SYSCTL_WUNLOCK.

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◆ sysctl_msec_to_sbintime()

int sysctl_msec_to_sbintime ( SYSCTL_HANDLER_ARGS )

Definition at line 1925 of file kern_sysctl.c.

References sysctl_handle_64().

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◆ sysctl_msec_to_ticks()

int sysctl_msec_to_ticks ( SYSCTL_HANDLER_ARGS )

Definition at line 1673 of file kern_sysctl.c.

References hz, and sysctl_handle_int().

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◆ sysctl_new_kernel()

static int sysctl_new_kernel	(	struct sysctl_req *	req,
		void *	p,
		size_t	l
	)

static

Definition at line 1994 of file kern_sysctl.c.

Referenced by kernel_sysctl(), sysctl_handle_string(), and sysctl_load_tunable_by_oid_locked().

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◆ sysctl_new_user()

static int sysctl_new_user	(	struct sysctl_req *	req,
		void *	p,
		size_t	l
	)

static

Definition at line 2116 of file kern_sysctl.c.

Referenced by userland_sysctl().

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◆ SYSCTL_NODE() [1/6]

static SYSCTL_NODE	(	_sysctl	,
		CTL_SYSCTL_NAME	,
		name	,
		CTLFLAG_RD\|CTLFLAG_MPSAFE\|	CTLFLAG_CAPRD,
		sysctl_sysctl_name	,
		""
	)

static

◆ SYSCTL_NODE() [2/6]

static SYSCTL_NODE	(	_sysctl	,
		CTL_SYSCTL_NEXT	,
		next	,
		CTLFLAG_RD\|CTLFLAG_MPSAFE\|	CTLFLAG_CAPRD,
		sysctl_sysctl_next	,
		""
	)

static

◆ SYSCTL_NODE() [3/6]

static SYSCTL_NODE	(	_sysctl	,
		CTL_SYSCTL_NEXTNOSKIP	,
		nextnoskip	,
		CTLFLAG_RD\|CTLFLAG_MPSAFE\|	CTLFLAG_CAPRD,
		sysctl_sysctl_next	,
		""
	)

static

◆ SYSCTL_NODE() [4/6]

static SYSCTL_NODE	(	_sysctl	,
		CTL_SYSCTL_OIDDESCR	,
		oiddescr	,
		CTLFLAG_RD\|CTLFLAG_MPSAFE\|	CTLFLAG_CAPRD,
		sysctl_sysctl_oiddescr	,
		""
	)

static

◆ SYSCTL_NODE() [5/6]

static SYSCTL_NODE	(	_sysctl	,
		CTL_SYSCTL_OIDFMT	,
		oidfmt	,
		CTLFLAG_RD\|CTLFLAG_MPSAFE\|	CTLFLAG_CAPRD,
		sysctl_sysctl_oidfmt	,
		""
	)

static

◆ SYSCTL_NODE() [6/6]

static SYSCTL_NODE	(	_sysctl	,
		CTL_SYSCTL_OIDLABEL	,
		oidlabel	,
		CTLFLAG_RD\|CTLFLAG_MPSAFE\|	CTLFLAG_CAPRD,
		sysctl_sysctl_oidlabel	,
		""
	)

static

◆ sysctl_old_kernel()

static int sysctl_old_kernel	(	struct sysctl_req *	req,
		const void *	p,
		size_t	l
	)

static

Definition at line 1973 of file kern_sysctl.c.

Referenced by kernel_sysctl(), and sysctl_load_tunable_by_oid_locked().

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◆ sysctl_old_user()

static int sysctl_old_user	(	struct sysctl_req *	req,
		const void *	p,
		size_t	l
	)

static

Definition at line 2078 of file kern_sysctl.c.

References copyout_nofault().

Referenced by sysctl_wire_old_buffer(), and userland_sysctl().

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◆ SYSCTL_PROC()

SYSCTL_PROC	(	_sysctl	,
		CTL_SYSCTL_NAME2OID	,
		name2oid	,
		CTLTYPE_INT\|CTLFLAG_RW\|CTLFLAG_ANYBODY\|CTLFLAG_MPSAFE\|	CTLFLAG_CAPRW,
		0	,
		0	,
		sysctl_sysctl_name2oid	,
		"I"	,
		""
	)

◆ sysctl_register_all()

static void sysctl_register_all ( void * arg )

static

Definition at line 969 of file kern_sysctl.c.

References SYSCTL_INIT, sysctl_register_oid(), SYSCTL_WLOCK, SYSCTL_WUNLOCK, sysctlmemlock, and sysctlstringlock.

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◆ sysctl_register_disabled_oid()

void sysctl_register_disabled_oid ( struct sysctl_oid * oidp )

Definition at line 526 of file kern_sysctl.c.

References sysctl_register_oid().

Referenced by linker_file_register_sysctls().

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◆ sysctl_register_oid()

void sysctl_register_oid ( struct sysctl_oid * oidp )

Definition at line 425 of file kern_sysctl.c.

References panic(), parent, printf(), SYSCTL_ASSERT_WLOCKED, sysctl_find_oidname(), sysctl_load_tunable_by_oid_locked(), and sysctl_warn_reuse().

Referenced by linker_file_register_sysctls(), sysctl_add_oid(), sysctl_ctx_free(), sysctl_move_oid(), sysctl_register_all(), sysctl_register_disabled_oid(), and vfs_register().

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◆ sysctl_remove_name()

int sysctl_remove_name	(	struct sysctl_oid *	parent,
		const char *	name,
		int	del,
		int	recurse
	)

Definition at line 732 of file kern_sysctl.c.

References name, parent, sysctl_remove_oid_locked(), SYSCTL_WLOCK, and SYSCTL_WUNLOCK.

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◆ sysctl_remove_oid()

int sysctl_remove_oid	(	struct sysctl_oid *	oidp,
		int	del,
		int	recurse
	)

Definition at line 721 of file kern_sysctl.c.

References sysctl_remove_oid_locked(), SYSCTL_WLOCK, and SYSCTL_WUNLOCK.

Referenced by et_deregister().

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◆ sysctl_remove_oid_locked()

static int sysctl_remove_oid_locked	(	struct sysctl_oid *	oidp,
		int	del,
		int	recurse
	)

static

Definition at line 792 of file kern_sysctl.c.

References free(), printf(), SYSCTL_ASSERT_WLOCKED, sysctl_remove_oid_locked(), SYSCTL_SLEEP, and sysctl_unregister_oid().

Referenced by sysctl_ctx_free(), sysctl_remove_name(), sysctl_remove_oid(), and sysctl_remove_oid_locked().

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◆ sysctl_rename_oid()

void sysctl_rename_oid	(	struct sysctl_oid *	oidp,
		const char *	name
	)

Definition at line 924 of file kern_sysctl.c.

References free(), name, SYSCTL_WLOCK, and SYSCTL_WUNLOCK.

Referenced by device_sysctl_update().

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◆ sysctl_root()

static int sysctl_root ( SYSCTL_HANDLER_ARGS )

static

Definition at line 2211 of file kern_sysctl.c.

References priv_check(), securelevel_gt(), sysctl_find_oid(), SYSCTL_RLOCK, sysctl_root_handler_locked(), and SYSCTL_RUNLOCK.

Referenced by kernel_sysctl(), and userland_sysctl().

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◆ sysctl_root_handler_locked()

static int sysctl_root_handler_locked	(	struct sysctl_oid *	oid,
		void *	arg1,
		intmax_t	arg2,
		struct sysctl_req *	req,
		struct rm_priotracker *	tracker
	)

static

Definition at line 165 of file kern_sysctl.c.

References Giant, SYSCTL_RLOCK, SYSCTL_RUNLOCK, SYSCTL_WLOCK, SYSCTL_WUNLOCK, and wakeup().

Referenced by sysctl_load_tunable_by_oid_locked(), and sysctl_root().

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◆ sysctl_search_oid()

static int sysctl_search_oid	(	struct sysctl_oid **	nodes,
		struct sysctl_oid *	needle
	)

static

Definition at line 351 of file kern_sysctl.c.

References sysctl__children, and SYSCTL_ASSERT_LOCKED.

Referenced by sysctl_warn_reuse().

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◆ sysctl_sec_to_timeval()

int sysctl_sec_to_timeval ( SYSCTL_HANDLER_ARGS )

Definition at line 1949 of file kern_sysctl.c.

References sysctl_handle_int().

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◆ sysctl_sysctl_name()

static int sysctl_sysctl_name ( SYSCTL_HANDLER_ARGS )

static

Definition at line 1079 of file kern_sysctl.c.

References buf, name, snprintf(), sysctl__children, SYSCTL_RLOCK, SYSCTL_RUNLOCK, and sysctl_wire_old_buffer().

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◆ sysctl_sysctl_name2oid()

static int sysctl_sysctl_name2oid ( SYSCTL_HANDLER_ARGS )

static

Definition at line 1363 of file kern_sysctl.c.

References buf, free(), malloc(), name2oid(), SYSCTL_RLOCK, and SYSCTL_RUNLOCK.

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◆ sysctl_sysctl_next()

static int sysctl_sysctl_next ( SYSCTL_HANDLER_ARGS )

static

Definition at line 1292 of file kern_sysctl.c.

References name, sysctl__children, SYSCTL_RLOCK, SYSCTL_RUNLOCK, and sysctl_sysctl_next_action().

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◆ sysctl_sysctl_next_action()

static bool sysctl_sysctl_next_action	(	struct sysctl_oid_list *	lsp,
		int *	name,
		u_int	namelen,
		int *	next,
		int *	len,
		int	level,
		bool	honor_skip
	)

static

Definition at line 1239 of file kern_sysctl.c.

References ITER_CHILDREN, ITER_FOUND, ITER_SIBLINGS, level, name, SYSCTL_ASSERT_LOCKED, sysctl_sysctl_next_action(), and sysctl_sysctl_next_node().

Referenced by sysctl_sysctl_next(), and sysctl_sysctl_next_action().

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◆ sysctl_sysctl_next_node()

static enum sysctl_iter_action sysctl_sysctl_next_node	(	struct sysctl_oid *	oidp,
		int *	name,
		unsigned int	namelen,
		bool	honor_skip
	)

static

Definition at line 1159 of file kern_sysctl.c.

References ITER_CHILDREN, ITER_FOUND, ITER_SIBLINGS, and name.

Referenced by sysctl_sysctl_next_action().

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◆ sysctl_sysctl_oiddescr()

static int sysctl_sysctl_oiddescr ( SYSCTL_HANDLER_ARGS )

static

Definition at line 1444 of file kern_sysctl.c.

References sysctl_find_oid(), SYSCTL_RLOCK, SYSCTL_RUNLOCK, and sysctl_wire_old_buffer().

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◆ sysctl_sysctl_oidfmt()

static int sysctl_sysctl_oidfmt ( SYSCTL_HANDLER_ARGS )

static

Definition at line 1412 of file kern_sysctl.c.

References sysctl_find_oid(), SYSCTL_RLOCK, SYSCTL_RUNLOCK, and sysctl_wire_old_buffer().

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◆ sysctl_sysctl_oidlabel()

static int sysctl_sysctl_oidlabel ( SYSCTL_HANDLER_ARGS )

static

Definition at line 1473 of file kern_sysctl.c.

References sysctl_find_oid(), SYSCTL_RLOCK, SYSCTL_RUNLOCK, and sysctl_wire_old_buffer().

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◆ sysctl_unregister_oid()

void sysctl_unregister_oid ( struct sysctl_oid * oidp )

Definition at line 557 of file kern_sysctl.c.

References printf(), and SYSCTL_ASSERT_WLOCKED.

Referenced by linker_file_unregister_sysctls(), sysctl_move_oid(), sysctl_remove_oid_locked(), and vfs_register().

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◆ sysctl_usec_to_sbintime()

int sysctl_usec_to_sbintime ( SYSCTL_HANDLER_ARGS )

Definition at line 1902 of file kern_sysctl.c.

References sysctl_handle_64().

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◆ sysctl_warn_reuse()

static void sysctl_warn_reuse	(	const char *	func,
		struct sysctl_oid *	leaf
	)

static

Definition at line 382 of file kern_sysctl.c.

References buf, sbuf_finish(), sbuf_new(), sbuf_printf(), sbuf_printf_drain(), sbuf_set_drain(), and sysctl_search_oid().

Referenced by sysctl_add_oid(), and sysctl_register_oid().

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◆ sysctl_wire_old_buffer()

int sysctl_wire_old_buffer	(	struct sysctl_req *	req,
		size_t	len
	)

Definition at line 2136 of file kern_sysctl.c.

References sysctl_old_user().

Referenced by dumpdevname_sysctl_handler(), kdb_sysctl_enter(), kdb_sysctl_panic(), kdb_sysctl_stack_overflow(), kdb_sysctl_trap(), kdb_sysctl_trap_code(), sysctl_debug_witness_fullgraph(), sysctl_kern_file(), sysctl_kern_function_list(), sysctl_kern_malloc_stats(), sysctl_kern_proc(), sysctl_kern_randompid(), sysctl_kern_timecounter_choice(), sysctl_sysctl_name(), sysctl_sysctl_oiddescr(), sysctl_sysctl_oidfmt(), and sysctl_sysctl_oidlabel().

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◆ sysctl_wlock()

void sysctl_wlock ( void )

Definition at line 151 of file kern_sysctl.c.

References SYSCTL_WLOCK.

Referenced by linker_file_enable_sysctls(), linker_file_register_sysctls(), linker_file_unregister_sysctls(), and vfs_register().

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◆ sysctl_wunlock()

void sysctl_wunlock ( void )

Definition at line 158 of file kern_sysctl.c.

References SYSCTL_WUNLOCK.

Referenced by linker_file_enable_sysctls(), linker_file_register_sysctls(), linker_file_unregister_sysctls(), and vfs_register().

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◆ SYSINIT()

SYSINIT	(	sysctl	,
		SI_SUB_KMEM	,
		SI_ORDER_FIRST	,
		sysctl_register_all	,
		NULL
	)

◆ userland_sysctl()

int userland_sysctl	(	struct thread *	td,
		int *	name,
		u_int	namelen,
		void *	old,
		size_t *	oldlenp,
		int	inkernel,
		const void *	new,
		size_t	newlen,
		size_t *	retval,
		int	flags
	)

Definition at line 2415 of file kern_sysctl.c.

References flags, kern_yield(), name, sysctl_new_user(), sysctl_old_user(), sysctl_root(), and sysctlmemlock.

Referenced by kern___sysctlbyname(), and sys___sysctl().

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Variable Documentation

◆ sysctl__children

struct sysctl_oid_list sysctl__children = SLIST_HEAD_INITIALIZER(&sysctl__children)

Definition at line 123 of file kern_sysctl.c.

Referenced by name2oid(), sysctl_find_oid(), sysctl_search_oid(), sysctl_sysctl_name(), and sysctl_sysctl_next().

◆ sysctllock

struct rmlock sysctllock

static

Definition at line 103 of file kern_sysctl.c.

◆ sysctlmemlock

struct sx __exclusive_cache_line sysctlmemlock

static

Definition at line 104 of file kern_sysctl.c.

Referenced by sysctl_register_all(), and userland_sysctl().

◆ sysctlstringlock

struct sx sysctlstringlock

static

Definition at line 105 of file kern_sysctl.c.

Referenced by sysctl_handle_string(), and sysctl_register_all().

Data Structures

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

◆ SYSCTL_ASSERT_LOCKED

◆ SYSCTL_ASSERT_RLOCKED

◆ SYSCTL_ASSERT_WLOCKED

◆ SYSCTL_INIT

◆ SYSCTL_RLOCK

◆ SYSCTL_RUNLOCK

◆ SYSCTL_SLEEP

◆ SYSCTL_WLOCK

◆ SYSCTL_WLOCKED

◆ SYSCTL_WUNLOCK

Enumeration Type Documentation

◆ sysctl_iter_action

Function Documentation

◆ __FBSDID()

◆ kern___sysctlbyname()

◆ kernel_sysctl()

◆ kernel_sysctlbyname()

◆ MALLOC_DEFINE() [1/3]

◆ MALLOC_DEFINE() [2/3]

◆ MALLOC_DEFINE() [3/3]

◆ name2oid()

◆ sbuf_new_for_sysctl()

◆ sbuf_sysctl_drain()

◆ SET_DECLARE()

◆ sys___sysctl()

◆ sys___sysctlbyname()

◆ sysctl_add_oid()

◆ sysctl_ctx_entry_add()

◆ sysctl_ctx_entry_del()

◆ sysctl_ctx_entry_find()

◆ sysctl_ctx_free()

◆ sysctl_ctx_init()

◆ sysctl_enable_oid()

◆ sysctl_escape_name()

◆ sysctl_find_oid()

◆ sysctl_find_oidname()

◆ sysctl_handle_16()

◆ sysctl_handle_32()

◆ sysctl_handle_64()

◆ sysctl_handle_8()

◆ sysctl_handle_bool()

◆ sysctl_handle_int()

◆ sysctl_handle_long()

◆ sysctl_handle_opaque()

◆ sysctl_handle_string()

◆ sysctl_load_tunable_by_oid_locked()

◆ sysctl_move_oid()

◆ sysctl_msec_to_sbintime()

◆ sysctl_msec_to_ticks()

◆ sysctl_new_kernel()

◆ sysctl_new_user()

◆ SYSCTL_NODE() [1/6]

◆ SYSCTL_NODE() [2/6]

◆ SYSCTL_NODE() [3/6]

◆ SYSCTL_NODE() [4/6]

◆ SYSCTL_NODE() [5/6]

◆ SYSCTL_NODE() [6/6]

◆ sysctl_old_kernel()

◆ sysctl_old_user()

◆ SYSCTL_PROC()

◆ sysctl_register_all()

◆ sysctl_register_disabled_oid()

◆ sysctl_register_oid()

◆ sysctl_remove_name()

◆ sysctl_remove_oid()

◆ sysctl_remove_oid_locked()

◆ sysctl_rename_oid()

◆ sysctl_root()

◆ sysctl_root_handler_locked()

◆ sysctl_search_oid()

◆ sysctl_sec_to_timeval()

◆ sysctl_sysctl_name()

◆ sysctl_sysctl_name2oid()

◆ sysctl_sysctl_next()