summaryrefslogtreecommitdiff
path: root/sys/dev/random
Commit message (Collapse)AuthorAgeFilesLines
* Fix a major faux pas of mine. I was causing 2 very bad things toMark Murray2003-11-201-12/+56
| | | | | | | | | | | | | | | | | | happen in interrupt context; 1) sleep locks, and 2) malloc/free calls. 1) is fixed by using spin locks instead. 2) is fixed by preallocating a FIFO (implemented with a STAILQ) and using elements from this FIFO instead. This turns out to be rather fast. OK'ed by: re (scottl) Thanks to: peter, jhb, rwatson, jake Apologies to: * Notes: svn path=/head/; revision=122917
* Overhaul the entropy device:Mark Murray2003-11-175-123/+101
| | | | | | | | | | | | | | | | | | | | | o Each source gets its own queue, which is a FIFO, not a ring buffer. The FIFOs are implemented with the sys/queue.h macros. The separation is so that a low entropy/high rate source can't swamp the harvester with low-grade entropy and destroy the reseeds. o Each FIFO is limited to 256 (set as a macro, so adjustable) events queueable. Full FIFOs are ignored by the harvester. This is to prevent memory wastage, and helps to keep the kernel thread CPU usage within reasonable limits. o There is no need to break up the event harvesting into ${burst} sized chunks, so retire that feature. o Break the device away from its roots with the memory device, and allow it to get its major number automagically. Notes: svn path=/head/; revision=122871
* - Implement selwakeuppri() which allows raising the priority of aSeigo Tanimura2003-11-091-1/+1
| | | | | | | | | | | | | | | | thread being waken up. The thread waken up can run at a priority as high as after tsleep(). - Replace selwakeup()s with selwakeuppri()s and pass appropriate priorities. - Add cv_broadcastpri() which raises the priority of the broadcast threads. Used by selwakeuppri() if collision occurs. Not objected in: -arch, -current Notes: svn path=/head/; revision=122352
* Make sure we get all user-written input. This simplifies theMark Murray2003-11-021-14/+5
| | | | | | | | | | code considerably. Submitted by: (forgotten) [I'll happily acknowledge the submitter if he owns up!] Notes: svn path=/head/; revision=121895
* Use __FBSDID().David E. O'Brien2003-08-244-4/+12
| | | | | | | Also some minor style cleanups. Notes: svn path=/head/; revision=119418
* Change the sleep identifier to "-" where random normally sleeps.Poul-Henning Kamp2003-07-021-1/+1
| | | | Notes: svn path=/head/; revision=117149
* Gigacommit to improve device-driver source compatibility betweenPoul-Henning Kamp2003-03-031-14/+8
| | | | | | | | | | | | | | | | branches: Initialize struct cdevsw using C99 sparse initializtion and remove all initializations to default values. This patch is automatically generated and has been tested by compiling LINT with all the fields in struct cdevsw in reverse order on alpha, sparc64 and i386. Approved by: re(scottl) Notes: svn path=/head/; revision=111815
* Back out M_* changes, per decision of the TRB.Warner Losh2003-02-191-2/+2
| | | | | | | Approved by: trb Notes: svn path=/head/; revision=111119
* Remove srandom():Andrey A. Chernov2003-02-051-6/+1
| | | | | | | | | | | 1) It is already called in init_main.c:proc0_post() 2) It is called each time read_random_phony() called, because "initialized" variable is never set to 1. Approved by: markm Notes: svn path=/head/; revision=110404
* Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.Alfred Perlstein2003-01-211-2/+2
| | | | | | | Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT. Notes: svn path=/head/; revision=109623
* Fix a buffer overrun in /dev/random which, due to the nature of theMark Murray2002-12-121-3/+4
| | | | | | | | | | | | kernel memory allocator, is harmless. This could be a problem for other systems, though. I've modified Darren's patch a little. Original patch by: Darren Schack, Isilon Systems, Inc <darrens@isilon.com> Also analysed by: SGI, and in particular Divy Le Ray of SGI OK'ed by: re(rwatson) Notes: svn path=/head/; revision=107789
* Some kernel threads try to do significant work, and the default KSTACK_PAGESScott Long2002-10-021-1/+1
| | | | | | | | | | | | | | | | doesn't give them enough stack to do much before blowing away the pcb. This adds MI and MD code to allow the allocation of an alternate kstack who's size can be speficied when calling kthread_create. Passing the value 0 prevents the alternate kstack from being created. Note that the ia64 MD code is missing for now, and PowerPC was only partially written due to the pmap.c being incomplete there. Though this patch does not modify anything to make use of the alternate kstack, acpi and usb are good candidates. Reviewed by: jake, peter, jhb Notes: svn path=/head/; revision=104354
* Remove #ifdef'ed Giant mutex wrappers round debugging statements.Mark Murray2002-09-212-10/+0
| | | | Notes: svn path=/head/; revision=103765
* No functional change. Fix comments and whitespace.Mark Murray2002-09-211-4/+3
| | | | Notes: svn path=/head/; revision=103763
* Upgrade the random device to use a "real" hash instead of buildingMark Murray2002-07-153-54/+11
| | | | | | | | | | | | | one out of a block cipher. This has 2 advantages: 1) The code is _much_ simpler 2) We aren't committing our security to one algorithm (much as we may think we trust AES). While I'm here, make an explicit reseed do a slow reseed instead of a fast; this is in line with what the original paper suggested. Notes: svn path=/head/; revision=100082
* Fix really dumb braino of mine; cast a sizeof() to an int, which it isMark Murray2002-04-211-1/+1
| | | | | | | being compared to, not size_t, which it already is. Notes: svn path=/head/; revision=95197
* Change callers of mtx_init() to pass in an appropriate lock type name. InJohn Baldwin2002-04-041-1/+1
| | | | | | | | | | most cases NULL is passed, but in some cases such as network driver locks (which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used. Tested on: i386, alpha, sparc64 Notes: svn path=/head/; revision=93818
* Change the suser() API to take advantage of td_ucred as well as do aJohn Baldwin2002-04-011-2/+2
| | | | | | | | | | | | | | | 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
* Provide infrastructure for harvesting SWI entropy.Mark Murray2002-03-031-0/+3
| | | | Notes: svn path=/head/; revision=91601
* Massive lint-inspired cleanup.Mark Murray2002-03-036-70/+84
| | | | | | | | | | Remove unneeded includes. Deal with unused function arguments. Resolve a boatload of signed/unsigned imcompatabilities. Etc. Notes: svn path=/head/; revision=91600
* Simple p_ucred -> td_ucred changes to start using the per-thread ucredJohn Baldwin2002-02-271-2/+2
| | | | | | | reference. Notes: svn path=/head/; revision=91406
* Staticise the random_state array.Mike Smith2002-01-102-5/+3
| | | | | | | Reviewed by: markm Notes: svn path=/head/; revision=89170
* o Modify open() and close() for /dev/random to use securelevel_gt() insteadRobert Watson2001-09-261-6/+16
| | | | | | | | | of direct securelevel variable checks. Obtained from: TrustedBSD Project Notes: svn path=/head/; revision=83976
* Use the passed in thread to selrecord() instead of curthread.John Baldwin2001-09-211-1/+1
| | | | Notes: svn path=/head/; revision=83805
* KSE Milestone 2Julian Elischer2001-09-121-7/+8
| | | | | | | | | | | | | | | | | 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
* Fix a minor buglet/typo here that gcc3 complains about.Peter Wemm2001-09-101-1/+1
| | | | Notes: svn path=/head/; revision=83267
* Fix type warnings.Mark Murray2001-07-201-4/+8
| | | | | | | PR: 29101 Notes: svn path=/head/; revision=80032
* Undo part of the tangle of having sys/lock.h and sys/mutex.h included inMark Murray2001-05-011-6/+8
| | | | | | | | | | | | | | 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
* Catch up to header include changes:John Baldwin2001-03-282-0/+2
| | | | | | | | - <sys/mutex.h> now requires <sys/systm.h> - <sys/mutex.h> and <sys/sx.h> now require <sys/lock.h> Notes: svn path=/head/; revision=74914
* Fix nasty corruption problem where a 64bit variable was being usedMark Murray2001-03-281-8/+6
| | | | | | | | | (overflowed) to catch a 256bit result. Hard work done by: jhb Notes: svn path=/head/; revision=74908
* Send the remains (such as I have located) of "block major numbers" toPoul-Henning Kamp2001-03-261-1/+0
| | | | | | | the bit-bucket. Notes: svn path=/head/; revision=74810
* Allow bog-standard ioctls through. There are really handled inMark Murray2001-03-251-1/+9
| | | | | | | higher layers, but there needs to be a "no-error" return here. Notes: svn path=/head/; revision=74771
* Silence (harmless) warnings.Mark Murray2001-03-241-0/+1
| | | | Notes: svn path=/head/; revision=74741
* Very large makeover of the /dev/random driver.Mark Murray2001-03-107-458/+504
| | | | | | | | | | | | | | | | | | | | | | | | | | | o Separate the kernel stuff from the Yarrow algorithm. Yarrow is now well contained in one source file and one header. o Replace the Blowfish-based crypto routines with Rijndael-based ones. (Rijndael is the new AES algorithm). The huge improvement in Rijndael's key-agility over Blowfish means that this is an extremely dramatic improvement in speed, and makes a heck of a difference in its (lack of) CPU load. o Clean up the sysctl's. At BDE's prompting, I have gone back to static sysctls. o Bug fixes. The streamlining of the crypto stuff enabled me to find and fix some bugs. DES also found a bug in the reseed routine which is fixed. o Change the way reseeds clear "used" entropy. Previously, only the source(s) that caused a reseed were cleared. Now all sources in the relevant pool(s) are cleared. o Code tidy-up. Mostly to make it (nearly) 80-column compliant. Notes: svn path=/head/; revision=74072
* Take down a comment that is no longer true.Mark Murray2001-03-031-4/+0
| | | | | | | /dev/random is ready for prime time! Notes: svn path=/head/; revision=73379
* Provide the infrastructure for sysadmins to select the broad classMark Murray2001-02-182-1/+16
| | | | | | | | of entropy harvesting they wish to perform: "ethernet" (LAN), point-to-point and interrupt. Notes: svn path=/head/; revision=72667
* Make a big improvement to entropy-harvesting speed by not having anyMark Murray2001-02-112-66/+41
| | | | | | | locks (only atomic assigns) in the harvest ringbuffer. Notes: svn path=/head/; revision=72364
* Change and clean the mutex lock interface.Bosko Milekic2001-02-092-37/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | mtx_enter(lock, type) becomes: mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks) mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized) similarily, for releasing a lock, we now have: mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN. We change the caller interface for the two different types of locks because the semantics are entirely different for each case, and this makes it explicitly clear and, at the same time, it rids us of the extra `type' argument. The enter->lock and exit->unlock change has been made with the idea that we're "locking data" and not "entering locked code" in mind. Further, remove all additional "flags" previously passed to the lock acquire/release routines with the exception of two: MTX_QUIET and MTX_NOSWITCH The functionality of these flags is preserved and they can be passed to the lock/unlock routines by calling the corresponding wrappers: mtx_{lock, unlock}_flags(lock, flag(s)) and mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN locks, respectively. Re-inline some lock acq/rel code; in the sleep lock case, we only inline the _obtain_lock()s in order to ensure that the inlined code fits into a cache line. In the spin lock case, we inline recursion and actually only perform a function call if we need to spin. This change has been made with the idea that we generally tend to avoid spin locks and that also the spin locks that we do have and are heavily used (i.e. sched_lock) do recurse, and therefore in an effort to reduce function call overhead for some architectures (such as alpha), we inline recursion for this case. Create a new malloc type for the witness code and retire from using the M_DEV type. The new type is called M_WITNESS and is only declared if WITNESS is enabled. Begin cleaning up some machdep/mutex.h code - specifically updated the "optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently need those. Finally, caught up to the interface changes in all sys code. Contributors: jake, jhb, jasone (in no particular order) Notes: svn path=/head/; revision=72200
* Fix typos: initalise -> initialise.Jeroen Ruigrok van der Werven2001-02-081-5/+5
| | | | | | | Initalise is not an english word. Notes: svn path=/head/; revision=72180
* Remove NOBLOCKRANDOM as a compile-time option. Instead, provideMark Murray2001-01-143-20/+58
| | | | | | | | | | | | | | | | | | | exactly the same functionality via a sysctl, making this feature a run-time option. The default is 1(ON), which means that /dev/random device will NOT block at startup. setting kern.random.sys.seeded to 0(OFF) will cause /dev/random to block until the next reseed, at which stage the sysctl will be changed back to 1(ON). While I'm here, clean up the sysctls, and make them dynamic. Reviewed by: des Tested on Alpha by: obrien Notes: svn path=/head/; revision=71037
* select() DKI is now in <sys/selinfo.h>.Garrett Wollman2001-01-093-3/+3
| | | | Notes: svn path=/head/; revision=70834
* Major speedup to /dev/random and the kernel thread that reseeds it.Mark Murray2000-12-022-93/+103
| | | | | | | | | | | | | | | | | There is no more TAILQ fifo to harvest the entropy; instead, there is a circular buffer of constant size (changeable by macro) that pretty dramatically improves the speed and fixes potential slowdowns- by-locking. Also gone are a slew of malloc(9) and free(9) calls; all harvesting buffers are static. All-in-all, this is a good performance improvement. Thanks-to: msmith for the circular buffer concept-code. Notes: svn path=/head/; revision=69526
* Fix safety-net code. While technically a bug, I'm delighted to seeMark Murray2000-11-261-1/+1
| | | | | | | | | that it has never (apparently) been invoked. Submitted by: ache Notes: svn path=/head/; revision=69198
* D'uh. The explicit reseed was happening at the wrong security/priveligeMark Murray2000-11-251-1/+1
| | | | | | | levels. Notes: svn path=/head/; revision=69174
* Greatly improve the boot-up unblocking time of the entropy device.Mark Murray2000-11-253-4/+19
| | | | Notes: svn path=/head/; revision=69172
* More comment changing. Keep documentation in one place.Mark Murray2000-11-251-4/+2
| | | | Notes: svn path=/head/; revision=69170
* Correct a comment. This represents a very minor policy change of myMark Murray2000-11-251-2/+0
| | | | | | | intentions with this code. Notes: svn path=/head/; revision=69169
* Stop explicitly using nanotime(9) and use the new get_cyclecounter(9)Mark Murray2000-11-254-37/+34
| | | | | | | | | | | | call instead. This makes a pretty dramatic difference to the amount of work that the harvester needs to do - it is much friendlier on the system. (80386 and 80486 class machines will notice little, as the new get_cyclecounter() call is a wrapper round nanotime(9) for them). Notes: svn path=/head/; revision=69168
* Move suser() and suser_xxx() prototypes and a related #define fromPoul-Henning Kamp2000-10-291-1/+0
| | | | | | | | | | | | <sys/proc.h> to <sys/systm.h>. Correctly document the #includes needed in the manpage. Add one now needed #include of <sys/systm.h>. Remove the consequent 48 unused #includes of <sys/proc.h>. Notes: svn path=/head/; revision=67893
* Remove unneeded #include <sys/proc.h> lines.Poul-Henning Kamp2000-10-291-1/+0
| | | | Notes: svn path=/head/; revision=67882
generated by cgit v1.3 (git 2.53.0) at 2026-05-10 00:39:58 +0000