/* $NetBSD: init_sysctl.c,v 1.183 2011/08/30 12:39:59 bouyer Exp $ */ /*- * Copyright (c) 2003, 2007, 2008, 2009 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Andrew Brown, and by Andrew Doran. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: init_sysctl.c,v 1.183 2011/08/30 12:39:59 bouyer Exp $"); #include "opt_sysv.h" #include "opt_compat_netbsd.h" #include "opt_modular.h" #include "opt_sa.h" #include "opt_posix.h" #include "pty.h" #include "rnd.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef COMPAT_50 #include #endif #ifdef KERN_SA #include #endif #include #if defined(MODULAR) || defined(P1003_1B_SEMAPHORE) int posix_semaphores = 200112; #else int posix_semaphores; #endif int security_setidcore_dump; char security_setidcore_path[MAXPATHLEN] = "/var/crash/%n.core"; uid_t security_setidcore_owner = 0; gid_t security_setidcore_group = 0; mode_t security_setidcore_mode = (S_IRUSR|S_IWUSR); static const u_int sysctl_flagmap[] = { PK_ADVLOCK, P_ADVLOCK, PK_EXEC, P_EXEC, PK_NOCLDWAIT, P_NOCLDWAIT, PK_32, P_32, PK_CLDSIGIGN, P_CLDSIGIGN, PK_SUGID, P_SUGID, 0 }; static const u_int sysctl_sflagmap[] = { PS_NOCLDSTOP, P_NOCLDSTOP, PS_WEXIT, P_WEXIT, PS_STOPFORK, P_STOPFORK, PS_STOPEXEC, P_STOPEXEC, PS_STOPEXIT, P_STOPEXIT, 0 }; static const u_int sysctl_slflagmap[] = { PSL_TRACED, P_TRACED, PSL_FSTRACE, P_FSTRACE, PSL_CHTRACED, P_CHTRACED, PSL_SYSCALL, P_SYSCALL, 0 }; static const u_int sysctl_lflagmap[] = { PL_CONTROLT, P_CONTROLT, PL_PPWAIT, P_PPWAIT, 0 }; static const u_int sysctl_stflagmap[] = { PST_PROFIL, P_PROFIL, 0 }; static const u_int sysctl_lwpprflagmap[] = { LPR_DETACHED, L_DETACHED, 0 }; /* * try over estimating by 5 procs/lwps */ #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) static int dcopyout(struct lwp *, const void *, void *, size_t); static int dcopyout(struct lwp *l, const void *kaddr, void *uaddr, size_t len) { int error; error = copyout(kaddr, uaddr, len); ktrmibio(-1, UIO_READ, uaddr, len, error); return error; } #ifdef DIAGNOSTIC static int sysctl_kern_trigger_panic(SYSCTLFN_PROTO); #endif static int sysctl_kern_maxvnodes(SYSCTLFN_PROTO); static int sysctl_kern_rtc_offset(SYSCTLFN_PROTO); static int sysctl_kern_maxproc(SYSCTLFN_PROTO); static int sysctl_kern_hostid(SYSCTLFN_PROTO); static int sysctl_setlen(SYSCTLFN_PROTO); static int sysctl_kern_clockrate(SYSCTLFN_PROTO); static int sysctl_msgbuf(SYSCTLFN_PROTO); static int sysctl_kern_defcorename(SYSCTLFN_PROTO); static int sysctl_kern_cptime(SYSCTLFN_PROTO); #if NPTY > 0 static int sysctl_kern_maxptys(SYSCTLFN_PROTO); #endif /* NPTY > 0 */ static int sysctl_kern_sbmax(SYSCTLFN_PROTO); static int sysctl_kern_urnd(SYSCTLFN_PROTO); static int sysctl_kern_arnd(SYSCTLFN_PROTO); static int sysctl_kern_lwp(SYSCTLFN_PROTO); static int sysctl_kern_forkfsleep(SYSCTLFN_PROTO); static int sysctl_kern_root_partition(SYSCTLFN_PROTO); static int sysctl_kern_drivers(SYSCTLFN_PROTO); static int sysctl_security_setidcore(SYSCTLFN_PROTO); static int sysctl_security_setidcorename(SYSCTLFN_PROTO); static int sysctl_kern_cpid(SYSCTLFN_PROTO); static int sysctl_hw_usermem(SYSCTLFN_PROTO); static int sysctl_hw_cnmagic(SYSCTLFN_PROTO); static void fill_lwp(struct lwp *l, struct kinfo_lwp *kl); /* * ******************************************************************** * section 1: setup routines * ******************************************************************** * These functions are stuffed into a link set for sysctl setup * functions. They're never called or referenced from anywhere else. * ******************************************************************** */ /* * this setup routine is a replacement for kern_sysctl() */ SYSCTL_SETUP(sysctl_kern_setup, "sysctl kern subtree setup") { extern int kern_logsigexit; /* defined in kern/kern_sig.c */ extern fixpt_t ccpu; /* defined in kern/kern_synch.c */ extern int dumponpanic; /* defined in kern/subr_prf.c */ const struct sysctlnode *rnode; sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "kern", NULL, NULL, 0, NULL, 0, CTL_KERN, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "ostype", SYSCTL_DESCR("Operating system type"), NULL, 0, __UNCONST(&ostype), 0, CTL_KERN, KERN_OSTYPE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "osrelease", SYSCTL_DESCR("Operating system release"), NULL, 0, __UNCONST(&osrelease), 0, CTL_KERN, KERN_OSRELEASE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "osrevision", SYSCTL_DESCR("Operating system revision"), NULL, __NetBSD_Version__, NULL, 0, CTL_KERN, KERN_OSREV, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "version", SYSCTL_DESCR("Kernel version"), NULL, 0, __UNCONST(&version), 0, CTL_KERN, KERN_VERSION, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "maxvnodes", SYSCTL_DESCR("Maximum number of vnodes"), sysctl_kern_maxvnodes, 0, NULL, 0, CTL_KERN, KERN_MAXVNODES, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "maxproc", SYSCTL_DESCR("Maximum number of simultaneous processes"), sysctl_kern_maxproc, 0, NULL, 0, CTL_KERN, KERN_MAXPROC, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "maxfiles", SYSCTL_DESCR("Maximum number of open files"), NULL, 0, &maxfiles, 0, CTL_KERN, KERN_MAXFILES, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "argmax", SYSCTL_DESCR("Maximum number of bytes of arguments to " "execve(2)"), NULL, ARG_MAX, NULL, 0, CTL_KERN, KERN_ARGMAX, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_STRING, "hostname", SYSCTL_DESCR("System hostname"), sysctl_setlen, 0, &hostname, MAXHOSTNAMELEN, CTL_KERN, KERN_HOSTNAME, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, CTLTYPE_INT, "hostid", SYSCTL_DESCR("System host ID number"), sysctl_kern_hostid, 0, NULL, 0, CTL_KERN, KERN_HOSTID, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "clockrate", SYSCTL_DESCR("Kernel clock rates"), sysctl_kern_clockrate, 0, NULL, sizeof(struct clockinfo), CTL_KERN, KERN_CLOCKRATE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "hardclock_ticks", SYSCTL_DESCR("Number of hardclock ticks"), NULL, 0, &hardclock_ticks, sizeof(hardclock_ticks), CTL_KERN, KERN_HARDCLOCK_TICKS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "vnode", SYSCTL_DESCR("System vnode table"), sysctl_kern_vnode, 0, NULL, 0, CTL_KERN, KERN_VNODE, CTL_EOL); #ifndef GPROF sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "profiling", SYSCTL_DESCR("Profiling information (not available)"), sysctl_notavail, 0, NULL, 0, CTL_KERN, KERN_PROF, CTL_EOL); #endif sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "posix1version", SYSCTL_DESCR("Version of ISO/IEC 9945 (POSIX 1003.1) " "with which the operating system attempts " "to comply"), NULL, _POSIX_VERSION, NULL, 0, CTL_KERN, KERN_POSIX1, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "ngroups", SYSCTL_DESCR("Maximum number of supplemental groups"), NULL, NGROUPS_MAX, NULL, 0, CTL_KERN, KERN_NGROUPS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "job_control", SYSCTL_DESCR("Whether job control is available"), NULL, 1, NULL, 0, CTL_KERN, KERN_JOB_CONTROL, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "saved_ids", SYSCTL_DESCR("Whether POSIX saved set-group/user ID is " "available"), NULL, #ifdef _POSIX_SAVED_IDS 1, #else /* _POSIX_SAVED_IDS */ 0, #endif /* _POSIX_SAVED_IDS */ NULL, 0, CTL_KERN, KERN_SAVED_IDS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_HEX, CTLTYPE_INT, "boothowto", SYSCTL_DESCR("Flags from boot loader"), NULL, 0, &boothowto, sizeof(boothowto), CTL_KERN, CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "boottime", SYSCTL_DESCR("System boot time"), NULL, 0, &boottime, sizeof(boottime), CTL_KERN, KERN_BOOTTIME, CTL_EOL); #ifdef COMPAT_50 { extern struct timeval50 boottime50; sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "oboottime", SYSCTL_DESCR("System boot time"), NULL, 0, &boottime50, sizeof(boottime50), CTL_KERN, KERN_OBOOTTIME, CTL_EOL); } #endif sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_STRING, "domainname", SYSCTL_DESCR("YP domain name"), sysctl_setlen, 0, &domainname, MAXHOSTNAMELEN, CTL_KERN, KERN_DOMAINNAME, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "maxpartitions", SYSCTL_DESCR("Maximum number of partitions allowed per " "disk"), NULL, MAXPARTITIONS, NULL, 0, CTL_KERN, KERN_MAXPARTITIONS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "rawpartition", SYSCTL_DESCR("Raw partition of a disk"), NULL, RAW_PART, NULL, 0, CTL_KERN, KERN_RAWPARTITION, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "timex", NULL, sysctl_notavail, 0, NULL, 0, CTL_KERN, KERN_TIMEX, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "rtc_offset", SYSCTL_DESCR("Offset of real time clock from UTC in " "minutes"), sysctl_kern_rtc_offset, 0, &rtc_offset, 0, CTL_KERN, KERN_RTC_OFFSET, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "root_device", SYSCTL_DESCR("Name of the root device"), sysctl_root_device, 0, NULL, 0, CTL_KERN, KERN_ROOT_DEVICE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "msgbufsize", SYSCTL_DESCR("Size of the kernel message buffer"), sysctl_msgbuf, 0, NULL, 0, CTL_KERN, KERN_MSGBUFSIZE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "fsync", SYSCTL_DESCR("Whether the POSIX 1003.1b File " "Synchronization Option is available on " "this system"), NULL, 1, NULL, 0, CTL_KERN, KERN_FSYNC, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "ipc", SYSCTL_DESCR("SysV IPC options"), NULL, 0, NULL, 0, CTL_KERN, KERN_SYSVIPC, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "sysvmsg", SYSCTL_DESCR("System V style message support available"), NULL, #ifdef SYSVMSG 1, #else /* SYSVMSG */ 0, #endif /* SYSVMSG */ NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_MSG, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "sysvsem", SYSCTL_DESCR("System V style semaphore support " "available"), NULL, #ifdef SYSVSEM 1, #else /* SYSVSEM */ 0, #endif /* SYSVSEM */ NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SEM, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "sysvshm", SYSCTL_DESCR("System V style shared memory support " "available"), NULL, #ifdef SYSVSHM 1, #else /* SYSVSHM */ 0, #endif /* SYSVSHM */ NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SHM, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "synchronized_io", SYSCTL_DESCR("Whether the POSIX 1003.1b Synchronized " "I/O Option is available on this system"), NULL, 1, NULL, 0, CTL_KERN, KERN_SYNCHRONIZED_IO, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "iov_max", SYSCTL_DESCR("Maximum number of iovec structures per " "process"), NULL, IOV_MAX, NULL, 0, CTL_KERN, KERN_IOV_MAX, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "mapped_files", SYSCTL_DESCR("Whether the POSIX 1003.1b Memory Mapped " "Files Option is available on this system"), NULL, 1, NULL, 0, CTL_KERN, KERN_MAPPED_FILES, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "memlock", SYSCTL_DESCR("Whether the POSIX 1003.1b Process Memory " "Locking Option is available on this " "system"), NULL, 1, NULL, 0, CTL_KERN, KERN_MEMLOCK, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "memlock_range", SYSCTL_DESCR("Whether the POSIX 1003.1b Range Memory " "Locking Option is available on this " "system"), NULL, 1, NULL, 0, CTL_KERN, KERN_MEMLOCK_RANGE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "memory_protection", SYSCTL_DESCR("Whether the POSIX 1003.1b Memory " "Protection Option is available on this " "system"), NULL, 1, NULL, 0, CTL_KERN, KERN_MEMORY_PROTECTION, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "login_name_max", SYSCTL_DESCR("Maximum login name length"), NULL, LOGIN_NAME_MAX, NULL, 0, CTL_KERN, KERN_LOGIN_NAME_MAX, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_STRING, "defcorename", SYSCTL_DESCR("Default core file name"), sysctl_kern_defcorename, 0, defcorename, MAXPATHLEN, CTL_KERN, KERN_DEFCORENAME, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "logsigexit", SYSCTL_DESCR("Log process exit when caused by signals"), NULL, 0, &kern_logsigexit, 0, CTL_KERN, KERN_LOGSIGEXIT, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "fscale", SYSCTL_DESCR("Kernel fixed-point scale factor"), NULL, FSCALE, NULL, 0, CTL_KERN, KERN_FSCALE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "ccpu", SYSCTL_DESCR("Scheduler exponential decay value"), NULL, 0, &ccpu, 0, CTL_KERN, KERN_CCPU, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "cp_time", SYSCTL_DESCR("Clock ticks spent in different CPU states"), sysctl_kern_cptime, 0, NULL, 0, CTL_KERN, KERN_CP_TIME, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "msgbuf", SYSCTL_DESCR("Kernel message buffer"), sysctl_msgbuf, 0, NULL, 0, CTL_KERN, KERN_MSGBUF, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "consdev", SYSCTL_DESCR("Console device"), sysctl_consdev, 0, NULL, sizeof(dev_t), CTL_KERN, KERN_CONSDEV, CTL_EOL); #if NPTY > 0 sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "maxptys", SYSCTL_DESCR("Maximum number of pseudo-ttys"), sysctl_kern_maxptys, 0, NULL, 0, CTL_KERN, KERN_MAXPTYS, CTL_EOL); #endif /* NPTY > 0 */ sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "maxphys", SYSCTL_DESCR("Maximum raw I/O transfer size"), NULL, MAXPHYS, NULL, 0, CTL_KERN, KERN_MAXPHYS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "sbmax", SYSCTL_DESCR("Maximum socket buffer size"), sysctl_kern_sbmax, 0, NULL, 0, CTL_KERN, KERN_SBMAX, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "monotonic_clock", SYSCTL_DESCR("Implementation version of the POSIX " "1003.1b Monotonic Clock Option"), /* XXX _POSIX_VERSION */ NULL, _POSIX_MONOTONIC_CLOCK, NULL, 0, CTL_KERN, KERN_MONOTONIC_CLOCK, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "urandom", SYSCTL_DESCR("Random integer value"), sysctl_kern_urnd, 0, NULL, 0, CTL_KERN, KERN_URND, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "arandom", SYSCTL_DESCR("n bytes of random data"), sysctl_kern_arnd, 0, NULL, 0, CTL_KERN, KERN_ARND, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "labelsector", SYSCTL_DESCR("Sector number containing the disklabel"), NULL, LABELSECTOR, NULL, 0, CTL_KERN, KERN_LABELSECTOR, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "labeloffset", SYSCTL_DESCR("Offset of the disklabel within the " "sector"), NULL, LABELOFFSET, NULL, 0, CTL_KERN, KERN_LABELOFFSET, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "labelusesmbr", SYSCTL_DESCR("disklabel is inside MBR partition"), NULL, LABELUSESMBR, NULL, 0, CTL_KERN, CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "lwp", SYSCTL_DESCR("System-wide LWP information"), sysctl_kern_lwp, 0, NULL, 0, CTL_KERN, KERN_LWP, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "forkfsleep", SYSCTL_DESCR("Milliseconds to sleep on fork failure due " "to process limits"), sysctl_kern_forkfsleep, 0, NULL, 0, CTL_KERN, KERN_FORKFSLEEP, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "posix_threads", SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " "Threads option to which the system " "attempts to conform"), /* XXX _POSIX_VERSION */ NULL, _POSIX_THREADS, NULL, 0, CTL_KERN, KERN_POSIX_THREADS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "posix_semaphores", SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " "Semaphores option to which the system " "attempts to conform"), NULL, 0, &posix_semaphores, 0, CTL_KERN, KERN_POSIX_SEMAPHORES, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "posix_barriers", SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " "Barriers option to which the system " "attempts to conform"), /* XXX _POSIX_VERSION */ NULL, _POSIX_BARRIERS, NULL, 0, CTL_KERN, KERN_POSIX_BARRIERS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "posix_timers", SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " "Timers option to which the system " "attempts to conform"), /* XXX _POSIX_VERSION */ NULL, _POSIX_TIMERS, NULL, 0, CTL_KERN, KERN_POSIX_TIMERS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "posix_spin_locks", SYSCTL_DESCR("Version of IEEE Std 1003.1 and its Spin " "Locks option to which the system attempts " "to conform"), /* XXX _POSIX_VERSION */ NULL, _POSIX_SPIN_LOCKS, NULL, 0, CTL_KERN, KERN_POSIX_SPIN_LOCKS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "posix_reader_writer_locks", SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " "Read-Write Locks option to which the " "system attempts to conform"), /* XXX _POSIX_VERSION */ NULL, _POSIX_READER_WRITER_LOCKS, NULL, 0, CTL_KERN, KERN_POSIX_READER_WRITER_LOCKS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "dump_on_panic", SYSCTL_DESCR("Perform a crash dump on system panic"), NULL, 0, &dumponpanic, 0, CTL_KERN, KERN_DUMP_ON_PANIC, CTL_EOL); #ifdef DIAGNOSTIC sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "panic_now", SYSCTL_DESCR("Trigger a panic"), sysctl_kern_trigger_panic, 0, NULL, 0, CTL_KERN, CTL_CREATE, CTL_EOL); #endif sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "root_partition", SYSCTL_DESCR("Root partition on the root device"), sysctl_kern_root_partition, 0, NULL, 0, CTL_KERN, KERN_ROOT_PARTITION, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "drivers", SYSCTL_DESCR("List of all drivers with block and " "character device numbers"), sysctl_kern_drivers, 0, NULL, 0, CTL_KERN, KERN_DRIVERS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "cp_id", SYSCTL_DESCR("Mapping of CPU number to CPU id"), sysctl_kern_cpid, 0, NULL, 0, CTL_KERN, KERN_CP_ID, CTL_EOL); sysctl_createv(clog, 0, NULL, &rnode, CTLFLAG_PERMANENT, CTLTYPE_NODE, "coredump", SYSCTL_DESCR("Coredump settings."), NULL, 0, NULL, 0, CTL_KERN, CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, &rnode, &rnode, CTLFLAG_PERMANENT, CTLTYPE_NODE, "setid", SYSCTL_DESCR("Set-id processes' coredump settings."), NULL, 0, NULL, 0, CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, &rnode, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "dump", SYSCTL_DESCR("Allow set-id processes to dump core."), sysctl_security_setidcore, 0, &security_setidcore_dump, sizeof(security_setidcore_dump), CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, &rnode, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_STRING, "path", SYSCTL_DESCR("Path pattern for set-id coredumps."), sysctl_security_setidcorename, 0, &security_setidcore_path, sizeof(security_setidcore_path), CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, &rnode, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "owner", SYSCTL_DESCR("Owner id for set-id processes' cores."), sysctl_security_setidcore, 0, &security_setidcore_owner, 0, CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, &rnode, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "group", SYSCTL_DESCR("Group id for set-id processes' cores."), sysctl_security_setidcore, 0, &security_setidcore_group, 0, CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, &rnode, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "mode", SYSCTL_DESCR("Mode for set-id processes' cores."), sysctl_security_setidcore, 0, &security_setidcore_mode, 0, CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, #ifndef KERN_SA CTLFLAG_IMMEDIATE| #endif CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "no_sa_support", SYSCTL_DESCR("0 if the kernel supports SA, otherwise " "it doesn't"), NULL, #ifndef KERN_SA 1, NULL, #else 0, &sa_system_disabled, #endif 0, CTL_KERN, CTL_CREATE, CTL_EOL); /* kern.posix. */ sysctl_createv(clog, 0, NULL, &rnode, CTLFLAG_PERMANENT, CTLTYPE_NODE, "posix", SYSCTL_DESCR("POSIX options"), NULL, 0, NULL, 0, CTL_KERN, CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, &rnode, NULL, CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT, "semmax", SYSCTL_DESCR("Maximal number of semaphores"), NULL, 0, &ksem_max, 0, CTL_CREATE, CTL_EOL); } SYSCTL_SETUP(sysctl_hw_setup, "sysctl hw subtree setup") { u_int u; u_quad_t q; sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "hw", NULL, NULL, 0, NULL, 0, CTL_HW, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "machine", SYSCTL_DESCR("Machine class"), NULL, 0, machine, 0, CTL_HW, HW_MACHINE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "model", SYSCTL_DESCR("Machine model"), NULL, 0, cpu_model, 0, CTL_HW, HW_MODEL, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "ncpu", SYSCTL_DESCR("Number of CPUs configured"), NULL, 0, &ncpu, 0, CTL_HW, HW_NCPU, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "byteorder", SYSCTL_DESCR("System byte order"), NULL, BYTE_ORDER, NULL, 0, CTL_HW, HW_BYTEORDER, CTL_EOL); u = ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) ? UINT_MAX : physmem * PAGE_SIZE; sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "physmem", SYSCTL_DESCR("Bytes of physical memory"), NULL, u, NULL, 0, CTL_HW, HW_PHYSMEM, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "usermem", SYSCTL_DESCR("Bytes of non-kernel memory"), sysctl_hw_usermem, 0, NULL, 0, CTL_HW, HW_USERMEM, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "pagesize", SYSCTL_DESCR("Software page size"), NULL, PAGE_SIZE, NULL, 0, CTL_HW, HW_PAGESIZE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "machine_arch", SYSCTL_DESCR("Machine CPU class"), NULL, 0, machine_arch, 0, CTL_HW, HW_MACHINE_ARCH, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_INT, "alignbytes", SYSCTL_DESCR("Alignment constraint for all possible " "data types"), NULL, ALIGNBYTES, NULL, 0, CTL_HW, HW_ALIGNBYTES, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, CTLTYPE_STRING, "cnmagic", SYSCTL_DESCR("Console magic key sequence"), sysctl_hw_cnmagic, 0, NULL, CNS_LEN, CTL_HW, HW_CNMAGIC, CTL_EOL); q = (u_quad_t)physmem * PAGE_SIZE; sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, CTLTYPE_QUAD, "physmem64", SYSCTL_DESCR("Bytes of physical memory"), NULL, q, NULL, 0, CTL_HW, HW_PHYSMEM64, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_QUAD, "usermem64", SYSCTL_DESCR("Bytes of non-kernel memory"), sysctl_hw_usermem, 0, NULL, 0, CTL_HW, HW_USERMEM64, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, "ncpuonline", SYSCTL_DESCR("Number of CPUs online"), NULL, 0, &ncpuonline, 0, CTL_HW, HW_NCPUONLINE, CTL_EOL); } #ifdef DEBUG /* * Debugging related system variables. */ struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; struct ctldebug debug5, debug6, debug7, debug8, debug9; struct ctldebug debug10, debug11, debug12, debug13, debug14; struct ctldebug debug15, debug16, debug17, debug18, debug19; static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { &debug0, &debug1, &debug2, &debug3, &debug4, &debug5, &debug6, &debug7, &debug8, &debug9, &debug10, &debug11, &debug12, &debug13, &debug14, &debug15, &debug16, &debug17, &debug18, &debug19, }; /* * this setup routine is a replacement for debug_sysctl() * * note that it creates several nodes per defined debug variable */ SYSCTL_SETUP(sysctl_debug_setup, "sysctl debug subtree setup") { struct ctldebug *cdp; char nodename[20]; int i; /* * two ways here: * * the "old" way (debug.name -> value) which was emulated by * the sysctl(8) binary * * the new way, which the sysctl(8) binary was actually using node debug node debug.0 string debug.0.name int debug.0.value int debug.name */ sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "debug", NULL, NULL, 0, NULL, 0, CTL_DEBUG, CTL_EOL); for (i = 0; i < CTL_DEBUG_MAXID; i++) { cdp = debugvars[i]; if (cdp->debugname == NULL || cdp->debugvar == NULL) continue; snprintf(nodename, sizeof(nodename), "debug%d", i); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, CTLTYPE_NODE, nodename, NULL, NULL, 0, NULL, 0, CTL_DEBUG, i, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, CTLTYPE_STRING, "name", NULL, /*XXXUNCONST*/ NULL, 0, __UNCONST(cdp->debugname), 0, CTL_DEBUG, i, CTL_DEBUG_NAME, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, CTLTYPE_INT, "value", NULL, NULL, 0, cdp->debugvar, 0, CTL_DEBUG, i, CTL_DEBUG_VALUE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_INT, cdp->debugname, NULL, NULL, 0, cdp->debugvar, 0, CTL_DEBUG, CTL_CREATE, CTL_EOL); } } #endif /* DEBUG */ /* * ******************************************************************** * section 2: private node-specific helper routines. * ******************************************************************** */ #ifdef DIAGNOSTIC static int sysctl_kern_trigger_panic(SYSCTLFN_ARGS) { int newtrig, error; struct sysctlnode node; newtrig = 0; node = *rnode; node.sysctl_data = &newtrig; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) return (error); if (newtrig != 0) panic("Panic triggered"); return (error); } #endif /* * sysctl helper routine for kern.maxvnodes. Drain vnodes if * new value is lower than desiredvnodes and then calls reinit * routines that needs to adjust to the new value. */ static int sysctl_kern_maxvnodes(SYSCTLFN_ARGS) { int error, new_vnodes, old_vnodes, new_max; struct sysctlnode node; new_vnodes = desiredvnodes; node = *rnode; node.sysctl_data = &new_vnodes; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) return (error); /* Limits: 75% of KVA and physical memory. */ new_max = calc_cache_size(kernel_map, 75, 75) / VNODE_COST; if (new_vnodes > new_max) new_vnodes = new_max; old_vnodes = desiredvnodes; desiredvnodes = new_vnodes; if (new_vnodes < old_vnodes) { error = vfs_drainvnodes(new_vnodes); if (error) { desiredvnodes = old_vnodes; return (error); } } vfs_reinit(); nchreinit(); return (0); } /* * sysctl helper routine for rtc_offset - set time after changes */ static int sysctl_kern_rtc_offset(SYSCTLFN_ARGS) { struct timespec ts, delta; int error, new_rtc_offset; struct sysctlnode node; new_rtc_offset = rtc_offset; node = *rnode; node.sysctl_data = &new_rtc_offset; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) return (error); if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_TIME, KAUTH_REQ_SYSTEM_TIME_RTCOFFSET, KAUTH_ARG(new_rtc_offset), NULL, NULL)) return (EPERM); if (rtc_offset == new_rtc_offset) return (0); /* if we change the offset, adjust the time */ nanotime(&ts); delta.tv_sec = 60 * (new_rtc_offset - rtc_offset); delta.tv_nsec = 0; timespecadd(&ts, &delta, &ts); rtc_offset = new_rtc_offset; return (settime(l->l_proc, &ts)); } /* * sysctl helper routine for kern.maxproc. Ensures that the new * values are not too low or too high. */ static int sysctl_kern_maxproc(SYSCTLFN_ARGS) { int error, nmaxproc; struct sysctlnode node; nmaxproc = maxproc; node = *rnode; node.sysctl_data = &nmaxproc; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) return (error); if (nmaxproc < 0 || nmaxproc >= PID_MAX) return (EINVAL); #ifdef __HAVE_CPU_MAXPROC if (nmaxproc > cpu_maxproc()) return (EINVAL); #endif maxproc = nmaxproc; return (0); } /* * sysctl helper function for kern.hostid. The hostid is a long, but * we export it as an int, so we need to give it a little help. */ static int sysctl_kern_hostid(SYSCTLFN_ARGS) { int error, inthostid; struct sysctlnode node; inthostid = hostid; /* XXX assumes sizeof int <= sizeof long */ node = *rnode; node.sysctl_data = &inthostid; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) return (error); hostid = (unsigned)inthostid; return (0); } /* * sysctl helper function for kern.hostname and kern.domainnname. * resets the relevant recorded length when the underlying name is * changed. */ static int sysctl_setlen(SYSCTLFN_ARGS) { int error; error = sysctl_lookup(SYSCTLFN_CALL(rnode)); if (error || newp == NULL) return (error); switch (rnode->sysctl_num) { case KERN_HOSTNAME: hostnamelen = strlen((const char*)rnode->sysctl_data); break; case KERN_DOMAINNAME: domainnamelen = strlen((const char*)rnode->sysctl_data); break; } return (0); } /* * sysctl helper routine for kern.clockrate. Assembles a struct on * the fly to be returned to the caller. */ static int sysctl_kern_clockrate(SYSCTLFN_ARGS) { struct clockinfo clkinfo; struct sysctlnode node; clkinfo.tick = tick; clkinfo.tickadj = tickadj; clkinfo.hz = hz; clkinfo.profhz = profhz; clkinfo.stathz = stathz ? stathz : hz; node = *rnode; node.sysctl_data = &clkinfo; return (sysctl_lookup(SYSCTLFN_CALL(&node))); } /* * sysctl helper routine for kern.msgbufsize and kern.msgbuf. For the * former it merely checks the message buffer is set up. For the latter, * it also copies out the data if necessary. */ static int sysctl_msgbuf(SYSCTLFN_ARGS) { char *where = oldp; size_t len, maxlen; long beg, end; extern kmutex_t log_lock; int error; if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { msgbufenabled = 0; return (ENXIO); } switch (rnode->sysctl_num) { case KERN_MSGBUFSIZE: { struct sysctlnode node = *rnode; int msg_bufs = (int)msgbufp->msg_bufs; node.sysctl_data = &msg_bufs; return (sysctl_lookup(SYSCTLFN_CALL(&node))); } case KERN_MSGBUF: break; default: return (EOPNOTSUPP); } if (newp != NULL) return (EPERM); if (oldp == NULL) { /* always return full buffer size */ *oldlenp = msgbufp->msg_bufs; return (0); } sysctl_unlock(); /* * First, copy from the write pointer to the end of * message buffer. */ error = 0; mutex_spin_enter(&log_lock); maxlen = MIN(msgbufp->msg_bufs, *oldlenp); beg = msgbufp->msg_bufx; end = msgbufp->msg_bufs; mutex_spin_exit(&log_lock); while (maxlen > 0) { len = MIN(end - beg, maxlen); if (len == 0) break; /* XXX unlocked, but hardly matters. */ error = dcopyout(l, &msgbufp->msg_bufc[beg], where, len); if (error) break; where += len; maxlen -= len; /* * ... then, copy from the beginning of message buffer to * the write pointer. */ beg = 0; end = msgbufp->msg_bufx; } sysctl_relock(); return (error); } /* * sysctl helper routine for kern.defcorename. In the case of a new * string being assigned, check that it's not a zero-length string. * (XXX the check in -current doesn't work, but do we really care?) */ static int sysctl_kern_defcorename(SYSCTLFN_ARGS) { int error; char *newcorename; struct sysctlnode node; newcorename = PNBUF_GET(); node = *rnode; node.sysctl_data = &newcorename[0]; memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) { goto done; } /* * when sysctl_lookup() deals with a string, it's guaranteed * to come back nul terminated. So there. :) */ if (strlen(newcorename) == 0) { error = EINVAL; } else { memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); error = 0; } done: PNBUF_PUT(newcorename); return error; } /* * sysctl helper routine for kern.cp_time node. Adds up cpu time * across all cpus. */ static int sysctl_kern_cptime(SYSCTLFN_ARGS) { struct sysctlnode node = *rnode; uint64_t *cp_time = NULL; int error, n = ncpu, i; struct cpu_info *ci; CPU_INFO_ITERATOR cii; /* * if you specifically pass a buffer that is the size of the * sum, or if you are probing for the size, you get the "sum" * of cp_time (and the size thereof) across all processors. * * alternately, you can pass an additional mib number and get * cp_time for that particular processor. */ switch (namelen) { case 0: if (*oldlenp == sizeof(uint64_t) * CPUSTATES || oldp == NULL) { node.sysctl_size = sizeof(uint64_t) * CPUSTATES; n = -1; /* SUM */ } else { node.sysctl_size = n * sizeof(uint64_t) * CPUSTATES; n = -2; /* ALL */ } break; case 1: if (name[0] < 0 || name[0] >= n) return (ENOENT); /* ENOSUCHPROCESSOR */ node.sysctl_size = sizeof(uint64_t) * CPUSTATES; n = name[0]; /* * adjust these so that sysctl_lookup() will be happy */ name++; namelen--; break; default: return (EINVAL); } cp_time = kmem_alloc(node.sysctl_size, KM_SLEEP); if (cp_time == NULL) return (ENOMEM); node.sysctl_data = cp_time; memset(cp_time, 0, node.sysctl_size); for (CPU_INFO_FOREACH(cii, ci)) { if (n <= 0) { for (i = 0; i < CPUSTATES; i++) { cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; } } /* * if a specific processor was requested and we just * did it, we're done here */ if (n == 0) break; /* * if doing "all", skip to next cp_time set for next processor */ if (n == -2) cp_time += CPUSTATES; /* * if we're doing a specific processor, we're one * processor closer */ if (n > 0) n--; } error = sysctl_lookup(SYSCTLFN_CALL(&node)); kmem_free(node.sysctl_data, node.sysctl_size); return (error); } #if NPTY > 0 /* * sysctl helper routine for kern.maxptys. Ensures that any new value * is acceptable to the pty subsystem. */ static int sysctl_kern_maxptys(SYSCTLFN_ARGS) { int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ int error, xmax; struct sysctlnode node; /* get current value of maxptys */ xmax = pty_maxptys(0, 0); node = *rnode; node.sysctl_data = &xmax; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) return (error); if (xmax != pty_maxptys(xmax, 1)) return (EINVAL); return (0); } #endif /* NPTY > 0 */ /* * sysctl helper routine for kern.sbmax. Basically just ensures that * any new value is not too small. */ static int sysctl_kern_sbmax(SYSCTLFN_ARGS) { int error, new_sbmax; struct sysctlnode node; new_sbmax = sb_max; node = *rnode; node.sysctl_data = &new_sbmax; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) return (error); KERNEL_LOCK(1, NULL); error = sb_max_set(new_sbmax); KERNEL_UNLOCK_ONE(NULL); return (error); } /* * sysctl helper routine for kern.urandom node. Picks a random number * for you. */ static int sysctl_kern_urnd(SYSCTLFN_ARGS) { #if NRND > 0 int v, rv; KERNEL_LOCK(1, NULL); rv = rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY); KERNEL_UNLOCK_ONE(NULL); if (rv == sizeof(v)) { struct sysctlnode node = *rnode; node.sysctl_data = &v; return (sysctl_lookup(SYSCTLFN_CALL(&node))); } else return (EIO); /*XXX*/ #else return (EOPNOTSUPP); #endif } /* * sysctl helper routine for kern.arandom node. Picks a random number * for you. */ static int sysctl_kern_arnd(SYSCTLFN_ARGS) { #if NRND > 0 int error; void *v; struct sysctlnode node = *rnode; if (*oldlenp == 0) return 0; if (*oldlenp > 8192) return E2BIG; v = kmem_alloc(*oldlenp, KM_SLEEP); arc4randbytes(v, *oldlenp); node.sysctl_data = v; node.sysctl_size = *oldlenp; error = sysctl_lookup(SYSCTLFN_CALL(&node)); kmem_free(v, *oldlenp); return error; #else return (EOPNOTSUPP); #endif } /* * sysctl helper routine to do kern.lwp.* work. */ static int sysctl_kern_lwp(SYSCTLFN_ARGS) { struct kinfo_lwp klwp; struct proc *p; struct lwp *l2, *l3; char *where, *dp; int pid, elem_size, elem_count; int buflen, needed, error; bool gotit; if (namelen == 1 && name[0] == CTL_QUERY) return (sysctl_query(SYSCTLFN_CALL(rnode))); dp = where = oldp; buflen = where != NULL ? *oldlenp : 0; error = needed = 0; if (newp != NULL || namelen != 3) return (EINVAL); pid = name[0]; elem_size = name[1]; elem_count = name[2]; sysctl_unlock(); if (pid == -1) { mutex_enter(proc_lock); PROCLIST_FOREACH(p, &allproc) { /* Grab a hold on the process. */ if (!rw_tryenter(&p->p_reflock, RW_READER)) { continue; } mutex_exit(proc_lock); mutex_enter(p->p_lock); LIST_FOREACH(l2, &p->p_lwps, l_sibling) { if (buflen >= elem_size && elem_count > 0) { lwp_lock(l2); fill_lwp(l2, &klwp); lwp_unlock(l2); mutex_exit(p->p_lock); /* * Copy out elem_size, but not * larger than the size of a * struct kinfo_proc2. */ error = dcopyout(l, &klwp, dp, min(sizeof(klwp), elem_size)); if (error) { rw_exit(&p->p_reflock); goto cleanup; } mutex_enter(p->p_lock); LIST_FOREACH(l3, &p->p_lwps, l_sibling) { if (l2 == l3) break; } if (l3 == NULL) { mutex_exit(p->p_lock); rw_exit(&p->p_reflock); error = EAGAIN; goto cleanup; } dp += elem_size; buflen -= elem_size; elem_count--; } needed += elem_size; } mutex_exit(p->p_lock); /* Drop reference to process. */ mutex_enter(proc_lock); rw_exit(&p->p_reflock); } mutex_exit(proc_lock); } else { mutex_enter(proc_lock); p = proc_find(pid); if (p == NULL) { error = ESRCH; mutex_exit(proc_lock); goto cleanup; } /* Grab a hold on the process. */ gotit = rw_tryenter(&p->p_reflock, RW_READER); mutex_exit(proc_lock); if (!gotit) { error = ESRCH; goto cleanup; } mutex_enter(p->p_lock); LIST_FOREACH(l2, &p->p_lwps, l_sibling) { if (buflen >= elem_size && elem_count > 0) { lwp_lock(l2); fill_lwp(l2, &klwp); lwp_unlock(l2); mutex_exit(p->p_lock); /* * Copy out elem_size, but not larger than * the size of a struct kinfo_proc2. */ error = dcopyout(l, &klwp, dp, min(sizeof(klwp), elem_size)); if (error) { rw_exit(&p->p_reflock); goto cleanup; } mutex_enter(p->p_lock); LIST_FOREACH(l3, &p->p_lwps, l_sibling) { if (l2 == l3) break; } if (l3 == NULL) { mutex_exit(p->p_lock); rw_exit(&p->p_reflock); error = EAGAIN; goto cleanup; } dp += elem_size; buflen -= elem_size; elem_count--; } needed += elem_size; } mutex_exit(p->p_lock); /* Drop reference to process. */ rw_exit(&p->p_reflock); } if (where != NULL) { *oldlenp = dp - where; if (needed > *oldlenp) { sysctl_relock(); return (ENOMEM); } } else { needed += KERN_LWPSLOP; *oldlenp = needed; } error = 0; cleanup: sysctl_relock(); return (error); } /* * sysctl helper routine for kern.forkfsleep node. Ensures that the * given value is not too large or two small, and is at least one * timer tick if not zero. */ static int sysctl_kern_forkfsleep(SYSCTLFN_ARGS) { /* userland sees value in ms, internally is in ticks */ extern int forkfsleep; /* defined in kern/kern_fork.c */ int error, timo, lsleep; struct sysctlnode node; lsleep = forkfsleep * 1000 / hz; node = *rnode; node.sysctl_data = &lsleep; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) return (error); /* refuse negative values, and overly 'long time' */ if (lsleep < 0 || lsleep > MAXSLP * 1000) return (EINVAL); timo = mstohz(lsleep); /* if the interval is >0 ms && <1 tick, use 1 tick */ if (lsleep != 0 && timo == 0) forkfsleep = 1; else forkfsleep = timo; return (0); } /* * sysctl helper routine for kern.root_partition */ static int sysctl_kern_root_partition(SYSCTLFN_ARGS) { int rootpart = DISKPART(rootdev); struct sysctlnode node = *rnode; node.sysctl_data = &rootpart; return (sysctl_lookup(SYSCTLFN_CALL(&node))); } /* * sysctl helper function for kern.drivers */ static int sysctl_kern_drivers(SYSCTLFN_ARGS) { int error; size_t buflen; struct kinfo_drivers kd; char *start, *where; const char *dname; int i; extern struct devsw_conv *devsw_conv; extern int max_devsw_convs; if (newp != NULL || namelen != 0) return (EINVAL); start = where = oldp; buflen = *oldlenp; if (where == NULL) { *oldlenp = max_devsw_convs * sizeof kd; return 0; } /* * An array of kinfo_drivers structures */ error = 0; sysctl_unlock(); mutex_enter(&device_lock); for (i = 0; i < max_devsw_convs; i++) { dname = devsw_conv[i].d_name; if (dname == NULL) continue; if (buflen < sizeof kd) { error = ENOMEM; break; } memset(&kd, 0, sizeof(kd)); kd.d_bmajor = devsw_conv[i].d_bmajor; kd.d_cmajor = devsw_conv[i].d_cmajor; strlcpy(kd.d_name, dname, sizeof kd.d_name); mutex_exit(&device_lock); error = dcopyout(l, &kd, where, sizeof kd); mutex_enter(&device_lock); if (error != 0) break; buflen -= sizeof kd; where += sizeof kd; } mutex_exit(&device_lock); sysctl_relock(); *oldlenp = where - start; return error; } static int sysctl_security_setidcore(SYSCTLFN_ARGS) { int newsize, error; struct sysctlnode node; node = *rnode; node.sysctl_data = &newsize; newsize = *(int *)rnode->sysctl_data; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) return error; if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 0, NULL, NULL, NULL)) return (EPERM); *(int *)rnode->sysctl_data = newsize; return 0; } static int sysctl_security_setidcorename(SYSCTLFN_ARGS) { int error; char *newsetidcorename; struct sysctlnode node; newsetidcorename = PNBUF_GET(); node = *rnode; node.sysctl_data = newsetidcorename; memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) { goto out; } if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 0, NULL, NULL, NULL)) { error = EPERM; goto out; } if (strlen(newsetidcorename) == 0) { error = EINVAL; goto out; } memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); out: PNBUF_PUT(newsetidcorename); return error; } /* * sysctl helper routine for kern.cp_id node. Maps cpus to their * cpuids. */ static int sysctl_kern_cpid(SYSCTLFN_ARGS) { struct sysctlnode node = *rnode; uint64_t *cp_id = NULL; int error, n = ncpu; struct cpu_info *ci; CPU_INFO_ITERATOR cii; /* * Here you may either retrieve a single cpu id or the whole * set. The size you get back when probing depends on what * you ask for. */ switch (namelen) { case 0: node.sysctl_size = n * sizeof(uint64_t); n = -2; /* ALL */ break; case 1: if (name[0] < 0 || name[0] >= n) return (ENOENT); /* ENOSUCHPROCESSOR */ node.sysctl_size = sizeof(uint64_t); n = name[0]; /* * adjust these so that sysctl_lookup() will be happy */ name++; namelen--; break; default: return (EINVAL); } cp_id = kmem_alloc(node.sysctl_size, KM_SLEEP); if (cp_id == NULL) return (ENOMEM); node.sysctl_data = cp_id; memset(cp_id, 0, node.sysctl_size); for (CPU_INFO_FOREACH(cii, ci)) { if (n <= 0) cp_id[0] = cpu_index(ci); /* * if a specific processor was requested and we just * did it, we're done here */ if (n == 0) break; /* * if doing "all", skip to next cp_id slot for next processor */ if (n == -2) cp_id++; /* * if we're doing a specific processor, we're one * processor closer */ if (n > 0) n--; } error = sysctl_lookup(SYSCTLFN_CALL(&node)); kmem_free(node.sysctl_data, node.sysctl_size); return (error); } /* * sysctl helper routine for hw.usermem and hw.usermem64. Values are * calculate on the fly taking into account integer overflow and the * current wired count. */ static int sysctl_hw_usermem(SYSCTLFN_ARGS) { u_int ui; u_quad_t uq; struct sysctlnode node; node = *rnode; switch (rnode->sysctl_num) { case HW_USERMEM: if ((ui = physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) ui = UINT_MAX; else ui *= PAGE_SIZE; node.sysctl_data = &ui; break; case HW_USERMEM64: uq = (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE; node.sysctl_data = &uq; break; default: return (EINVAL); } return (sysctl_lookup(SYSCTLFN_CALL(&node))); } /* * sysctl helper routine for kern.cnmagic node. Pulls the old value * out, encoded, and stuffs the new value in for decoding. */ static int sysctl_hw_cnmagic(SYSCTLFN_ARGS) { char magic[CNS_LEN]; int error; struct sysctlnode node; if (oldp) cn_get_magic(magic, CNS_LEN); node = *rnode; node.sysctl_data = &magic[0]; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL) return (error); return (cn_set_magic(magic)); } /* * ******************************************************************** * section 3: public helper routines that are used for more than one * node * ******************************************************************** */ /* * sysctl helper routine for the kern.root_device node and some ports' * machdep.root_device nodes. */ int sysctl_root_device(SYSCTLFN_ARGS) { struct sysctlnode node; node = *rnode; node.sysctl_data = root_device->dv_xname; node.sysctl_size = strlen(device_xname(root_device)) + 1; return (sysctl_lookup(SYSCTLFN_CALL(&node))); } /* * sysctl helper routine for kern.consdev, dependent on the current * state of the console. Also used for machdep.console_device on some * ports. */ int sysctl_consdev(SYSCTLFN_ARGS) { dev_t consdev; uint32_t oconsdev; struct sysctlnode node; if (cn_tab != NULL) consdev = cn_tab->cn_dev; else consdev = NODEV; node = *rnode; switch (*oldlenp) { case sizeof(consdev): node.sysctl_data = &consdev; node.sysctl_size = sizeof(consdev); break; case sizeof(oconsdev): oconsdev = (uint32_t)consdev; node.sysctl_data = &oconsdev; node.sysctl_size = sizeof(oconsdev); break; default: return EINVAL; } return (sysctl_lookup(SYSCTLFN_CALL(&node))); } /* * ******************************************************************** * section 4: support for some helpers * ******************************************************************** */ /* * Fill in a kinfo_lwp structure for the specified lwp. */ static void fill_lwp(struct lwp *l, struct kinfo_lwp *kl) { struct proc *p = l->l_proc; struct timeval tv; KASSERT(lwp_locked(l, NULL)); memset(kl, 0, sizeof(*kl)); kl->l_forw = 0; kl->l_back = 0; kl->l_laddr = PTRTOUINT64(l); kl->l_addr = PTRTOUINT64(l->l_addr); kl->l_stat = l->l_stat; kl->l_lid = l->l_lid; kl->l_flag = L_INMEM; kl->l_flag |= sysctl_map_flags(sysctl_lwpprflagmap, l->l_prflag); kl->l_flag |= sysctl_map_flags(sysctl_lwpflagmap, l->l_flag); kl->l_swtime = l->l_swtime; kl->l_slptime = l->l_slptime; if (l->l_stat == LSONPROC) kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; else kl->l_schedflags = 0; kl->l_priority = lwp_eprio(l); kl->l_usrpri = l->l_priority; if (l->l_wchan) strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); kl->l_wchan = PTRTOUINT64(l->l_wchan); kl->l_cpuid = cpu_index(l->l_cpu); bintime2timeval(&l->l_rtime, &tv); kl->l_rtime_sec = tv.tv_sec; kl->l_rtime_usec = tv.tv_usec; kl->l_cpticks = l->l_cpticks; kl->l_pctcpu = l->l_pctcpu; kl->l_pid = p->p_pid; if (l->l_name == NULL) kl->l_name[0] = '\0'; else strlcpy(kl->l_name, l->l_name, sizeof(kl->l_name)); }