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* o reduce the overhead of calling ppsratecheck by using ticks instead ofSam Leffler2002-12-311-55/+24
| | | | | | | | | | | | | | | | calling getmicrouptime (but maintain the struct timeval-based calling convention for compatibility) o eliminate the use of timersub in ratecheck Note that flood ping tests indicate ppsratecheck is inaccurate (but on the conservative side) with this revised implementation. If more accuracy is needed we'll have to introduce an alternate interface or increase the overhead. Reviewed by: silby, dillon, bde Notes: svn path=/head/; revision=108511
* add generic rate limiting support from netbsd; ratelimit is purely time based,Sam Leffler2002-12-201-0/+88
| | | | | | | | | ppsratecheck is for controlling packets/second Obtained from: netbsd Notes: svn path=/head/; revision=108142
* SCARGS removal take II.Alfred Perlstein2002-12-141-12/+12
| | | | Notes: svn path=/head/; revision=107849
* Backout removal SCARGS, the code freeze is only "selectively" over.Alfred Perlstein2002-12-131-12/+12
| | | | Notes: svn path=/head/; revision=107839
* Remove SCARGS.Alfred Perlstein2002-12-131-12/+12
| | | | | | | Reviewed by: md5 Notes: svn path=/head/; revision=107838
* Introduce mac_check_system_settime(), a MAC check allowing policies toRobert Watson2002-11-031-0/+13
| | | | | | | | | | augment the system policy for changing the system time. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories Notes: svn path=/head/; revision=106369
* Round up instead of towards 0 in clock_getres() so that a resolution ofBruce Evans2002-09-251-1/+6
| | | | | | | | | | 0 is never returned. PR: 41781 MFC after: 3 days Notes: svn path=/head/; revision=103964
* A side effect of some debugging: prototypify and deregister.Poul-Henning Kamp2002-08-181-45/+18
| | | | Notes: svn path=/head/; revision=102074
* more caddr_t removal.Alfred Perlstein2002-06-291-10/+6
| | | | Notes: svn path=/head/; revision=99012
* Hide the private parts of timecounter from a couple of places that don'tPoul-Henning Kamp2002-04-261-1/+1
| | | | | | | really need to know the gory details. Notes: svn path=/head/; revision=95529
* Improve the implementation of adjtime(2).Poul-Henning Kamp2002-04-151-72/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | Apply the change as a continuous slew rather than as a series of discrete steps and make it possible to adjust arbitraryly huge amounts of time in either direction. In practice this is done by hooking into the same once-per-second loop as the NTP PLL and setting a suitable frequency offset deducting the amount slewed from the remainder. If the remaining delta is larger than 1 second we slew at 5000PPM (5msec/sec), for a delta less than a second we slew at 500PPM (500usec/sec) and for the last one second period we will slew at whatever rate (less than 500PPM) it takes to eliminate the delta entirely. The old implementation stepped the clock a number of microseconds every HZ to acheive the same effect, using the same rates of change. Eliminate the global variables tickadj, tickdelta and timedelta and their various use and initializations. This removes the most significant obstacle to running timecounter and NTP housekeeping from a timeout rather than hardclock. Notes: svn path=/head/; revision=94754
* - Change settime() to take a thread as its first argument instead of a procJohn Baldwin2002-04-101-36/+27
| | | | | | | | | | | | so it can use td_ucred. - Push Giant down into the end of settime() where we actually set the time on the timecounter and time of day clock. - Remove Giant from clock_settime(). - Push Giant down in settimeofday() to just protect the 'tz' global variable. Notes: svn path=/head/; revision=94343
* Change the suser() API to take advantage of td_ucred as well as do aJohn Baldwin2002-04-011-3/+3
| | | | | | | | | | | | | | | general cleanup of the API. The entire API now consists of two functions similar to the pre-KSE API. The suser() function takes a thread pointer as its only argument. The td_ucred member of this thread must be valid so the only valid thread pointers are curthread and a few kernel threads such as thread0. The suser_cred() function takes a pointer to a struct ucred as its first argument and an integer flag as its second argument. The flag is currently only used for the PRISON_ROOT flag. Discussed on: smp@ Notes: svn path=/head/; revision=93593
* Remove __P.Alfred Perlstein2002-03-191-6/+6
| | | | Notes: svn path=/head/; revision=92723
* Take the common case of gettimeofday(&tv, NULL) out from under Giant.Poul-Henning Kamp2002-02-181-8/+4
| | | | Notes: svn path=/head/; revision=90836
* o Modify static settime() to accept the proc * for the process requestingRobert Watson2001-09-261-5/+6
| | | | | | | | | | a time change, and callers so that they provide td->td_proc. o Modify settime() to use securevel_gt() for securelevel checking. Obtained from: TrustedBSD Project Notes: svn path=/head/; revision=83969
* KSE Milestone 2Julian Elischer2001-09-121-26/+28
| | | | | | | | | | | | | | | | | Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha Notes: svn path=/head/; revision=83366
* Giant PushdownMatthew Dillon2001-09-011-47/+126
| | | | | | | | | | | clock_gettime() clock_settime() nanosleep() settimeofday() adjtime() getitimer() setitimer() __sysctl() ogetkerninfo() sigaction() osigaction() sigpending() osigpending() osigvec() osigblock() osigsetmask() sigsuspend() osigsuspend() osigstack() sigaltstack() kill() okillpg() trapsignal() nosys() Notes: svn path=/head/; revision=82746
* Undo part of the tangle of having sys/lock.h and sys/mutex.h included inMark Murray2001-05-011-0/+3
| | | | | | | | | | | | | | other "system" header files. Also help the deprecation of lockmgr.h by making it a sub-include of sys/lock.h and removing sys/lockmgr.h form kernel .c files. Sort sys/*.h includes where possible in affected files. OK'ed by: bde (with reservations) Notes: svn path=/head/; revision=76166
* Lock the process while sending it SIGARLM and updating p_realtimer.John Baldwin2001-03-071-0/+4
| | | | Notes: svn path=/head/; revision=73916
* Use callout_reset instead of timeout(9). Most callouts are staticallyJake Burkholder2000-11-271-5/+5
| | | | | | | | | allocated, 2 have been added to struct proc for setitimer and sleep. Reviewed by: jhb, jlemon Notes: svn path=/head/; revision=69286
* Remove unneeded <sys/buf.h> includes.Poul-Henning Kamp2000-04-181-1/+0
| | | | | | | | Due to some interesting cpp tricks in lockmgr, the LINT kernel shrinks by 924 bytes. Notes: svn path=/head/; revision=59368
* Isolate the Timecounter internals in their own two files.Poul-Henning Kamp2000-03-201-1/+2
| | | | | | | | | | | | | | | | | | Make the public interface more systematically named. Remove the alternate method, it doesn't do any good, only ruins performance. Add counters to profile the usage of the 8 access functions. Apply the beer-ware to my code. The weird +/- counts are caused by two repocopies behind the scenes: kern/kern_clock.c -> kern/kern_tc.c sys/time.h -> sys/timetc.h (thanks peter!) Notes: svn path=/head/; revision=58377
* Change useracc() and kernacc() to use VM_PROT_{READ|WRITE|EXECUTE} for thePoul-Henning Kamp1999-10-301-1/+2
| | | | | | | | | | | | "rw" argument, rather than hijacking B_{READ|WRITE}. Fix two bugs (physio & cam) resulting by the confusion caused by this. Submitted by: Tor.Egge@fast.no Reviewed by: alc, ken (partly) Notes: svn path=/head/; revision=52644
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50477
* Minor tweaks to make sure (new) prerequisites for <sys/buf.h> (mostlyPeter Wemm1999-06-271-1/+2
| | | | | | | splbio()/splx()) are #included in time. Notes: svn path=/head/; revision=48274
* Suser() simplification:Poul-Henning Kamp1999-04-271-4/+4
| | | | | | | | | | | | | | | | | | | | | | 1: s/suser/suser_xxx/ 2: Add new function: suser(struct proc *), prototyped in <sys/proc.h>. 3: s/suser_xxx(\([a-zA-Z0-9_]*\)->p_ucred, \&\1->p_acflag)/suser(\1)/ The remaining suser_xxx() calls will be scrutinized and dealt with later. There may be some unneeded #include <sys/cred.h>, but they are left as an exercise for Bruce. More changes to the suser() API will come along with the "jail" code. Notes: svn path=/head/; revision=46112
* More secure clock management. Allow positive steps only once per secondNick Sayer1999-04-071-11/+16
| | | | | | | | | | | | | for as much as one second, but no more. Allows a miscreant to double-time march the clock, but no worse. XXX Unlike putting negative deltas in a while(1), performing small positive steps inside of a while(1) will return EPERM for the unpermitted ones. Repeated negative deltas are clamped without error (but the kernel does log a notice). Notes: svn path=/head/; revision=45438
* Fix last delta so file would compile again- I think I got itMatt Jacob1999-04-071-10/+13
| | | | | | | | right. Add a clarifying (to me at least) comment. Some formatting fixes. Notes: svn path=/head/; revision=45437
* If securelevel>1, allow the clock to be adjusted negatively only up toNick Sayer1999-04-071-8/+27
| | | | | | | | | | | | | | | 1 second prior to the highest the clock has run so far. This allows time adjusters like xntpd to do their work, but the worst a miscreant can do is "freeze" the clock, not go back in time. We still need to decide on an algorithm to clamp positive adjustments. As it stands, it is possible to achieve arbitrary negative adjustments by "wrapping" time around. PR: 10361 Notes: svn path=/head/; revision=45433
* Added a used #include (don't depend on "vnode_if.h" including <sys/buf.h>).Bruce Evans1999-02-251-1/+2
| | | | Notes: svn path=/head/; revision=44272
* Fix warnings in preparation for adding -Wall -Wcast-qual to theMatthew Dillon1999-01-271-2/+2
| | | | | | | kernel compile Notes: svn path=/head/; revision=43301
* Nitpicking and dusting performed on a train. Removes trivial warningsPoul-Henning Kamp1998-10-251-2/+1
| | | | | | | about unused variables, labels and other lint. Notes: svn path=/head/; revision=40648
* Add a tc_ prefix to struct timecounter members.Poul-Henning Kamp1998-06-091-2/+2
| | | | | | | Urged by: bde Notes: svn path=/head/; revision=36810
* Fixed interval calculation in realitimexpire() again. Obtained from:Bruce Evans1998-05-171-4/+4
| | | | | | | | | rev.1.9. Broken in: rev.1.50. Fixed a spelling error. Obtained from: Lite2. Notes: svn path=/head/; revision=36128
* Fixed stale references to hzto() in comments.Bruce Evans1998-05-171-2/+2
| | | | Notes: svn path=/head/; revision=36127
* s/nanoruntime/nanouptime/gPoul-Henning Kamp1998-05-171-6/+6
| | | | | | | | | s/microruntime/microuptime/g Reviewed by: bde Notes: svn path=/head/; revision=36119
* Nuke signanosleep(). (I've left nanosleep1() seperate to nanosleep()Peter Wemm1998-05-141-56/+1
| | | | | | | as I don't want to mess with the multiple returns) Notes: svn path=/head/; revision=36035
* Commit an old change that has been sitting around for a long while.Peter Wemm1998-05-141-2/+16
| | | | | | | | | | | | | signanosleep() did not deal with signal masks properly. This change was based on a discussion with bde some time ago (at least 6 months or more). signanosleep() should probably go away since it was never really used for more than a few weeks and doesn't appear in released code. It should probably be killed before somebody uses it and it becomes a gratuitous nonstandard feature. Notes: svn path=/head/; revision=36032
* Make a kernel version of the timer* functions called timerval* to bePoul-Henning Kamp1998-04-061-13/+13
| | | | | | | | | more consistent. OK'ed by: bde Notes: svn path=/head/; revision=35058
* More fixes for the iterative case of nanosleep1 from bruce.Poul-Henning Kamp1998-04-051-5/+5
| | | | | | | I hate the 2-arg time{spec|val}{add|sub} functions! Notes: svn path=/head/; revision=35045
* Make the dummy timecounter run at 1 MHz rather than 100kHz (noticed by bde)Poul-Henning Kamp1998-04-051-10/+9
| | | | | | | fix the itimer(REAL) handling. Notes: svn path=/head/; revision=35044
* If there is no error code, don't copyout the remaining time. (AsPeter Wemm1998-04-051-3/+3
| | | | | | | | documented in the man page and the standards). (and besides, nanosleep1 isn't setting it in this case at present anyway, so we'd be copying junk). Notes: svn path=/head/; revision=35043
* Fix nanosleep1 based on Bruces suggestion.Poul-Henning Kamp1998-04-051-28/+22
| | | | Notes: svn path=/head/; revision=35042
* tsleep() returns EWOULDBLOCK if the timeout expired. Don't return thisPeter Wemm1998-04-051-2/+2
| | | | | | | to usermode, otherwise sleep(3) fails, cron doesn't work, etc etc etc. Notes: svn path=/head/; revision=35040
* Handle double fraction overflow in nano & microtime functions (spotted by Bruce)Poul-Henning Kamp1998-04-041-6/+3
| | | | | | | Use tvtohz() a place where it fits. Notes: svn path=/head/; revision=35033
* Time changes mark 2:Poul-Henning Kamp1998-04-041-60/+30
| | | | | | | | | | | | | | | | | | | | * Figure out UTC relative to boottime. Four new functions provide time relative to boottime. * move "runtime" into struct proc. This helps fix the calcru() problem in SMP. * kill mono_time. * add timespec{add|sub|cmp} macros to time.h. (XXX: These may change!) * nanosleep, select & poll takes long sleeps one day at a time Reviewed by: bde Tested by: ache and others Notes: svn path=/head/; revision=35029
* Eradicate the variable "time" from the kernel, using various measures.Poul-Henning Kamp1998-03-301-16/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "time" wasn't a atomic variable, so splfoo() protection were needed around any access to it, unless you just wanted the seconds part. Most uses of time.tv_sec now uses the new variable time_second instead. gettime() changed to getmicrotime(0. Remove a couple of unneeded splfoo() protections, the new getmicrotime() is atomic, (until Bruce sets a breakpoint in it). A couple of places needed random data, so use read_random() instead of mucking about with time which isn't random. Add a new nfs_curusec() function. Mark a couple of bogosities involving the now disappeard time variable. Update ffs_update() to avoid the weird "== &time" checks, by fixing the one remaining call that passwd &time as args. Change profiling in ncr.c to use ticks instead of time. Resolution is the same. Add new function "tvtohz()" to avoid the bogus "splfoo(), add time, call hzto() which subtracts time" sequences. Reviewed by: bde Notes: svn path=/head/; revision=34961
* Add two new functions, get{micro|nano}time.Poul-Henning Kamp1998-03-261-1/+2
| | | | | | | | | | | | | | | They are atomic, but return in essence what is in the "time" variable. gettime() is now a macro front for getmicrotime(). Various patches to use the two new functions instead of the various hacks used in their absence. Some puntuation and grammer patches from Bruce. A couple of XXX comments. Notes: svn path=/head/; revision=34901
* Fixed the calculation of `delta' in settime(). We once set allBruce Evans1998-02-251-29/+14
| | | | | | | | | | | | | | | | | | | | | | | | | times consistently wrong (up to 1 tick too late), but recent changes fixed the setting of the main clock, making other times inconsistent. The inconsistencies tended to show up as a negative resource usage for the process that set the time. Fixed the check for setting the clock backwards. A stale timestamp (`time') was checked, so it was possible to set the clock backwards by up to almost 1 tick. Until recently, this bug was compensated for by setting the clock consistently wrong. Merged the comment about setting the clock backwards from Lite2. Removed latency micro-optimizations/speed pessimizations in settime(). microtime() and set_timecounter() are relatively expensive, and they must be called together with clock updates blocked to get a consistent `delta', so significant latency optimizations are not possible. Removed some stale comments. Notes: svn path=/head/; revision=33818
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