Commit Graph

91 Commits

Author SHA1 Message Date
John Baldwin
39981fed82 Trim a few things from the dmesg output and stick them under bootverbose to
cut down on the clutter including PCI interrupt routing, MTRR, pcibios,
etc.

Discussed with:	USENIX Cabal
2004-07-01 07:46:29 +00:00
Poul-Henning Kamp
89c9c53da0 Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.
2004-06-16 09:47:26 +00:00
Poul-Henning Kamp
41ee9f1c69 Add some missing <sys/module.h> includes which are masked by the
one on death-row in <sys/kernel.h>
2004-05-30 17:57:46 +00:00
Mark Murray
5564b4b984 Add a Davies-Meyer style hash to the output. This is still pure
Nehemiah chip, but the work is all done in hardware.

There are three opportunities to add other entropy; the Data
Buffer, the Cipher's IV and the Cipher's key. A future commit
will exploit these opportunities.
2004-04-17 19:26:53 +00:00
Mark Murray
fa2d865bad More removal of the abortive locking code; malloc buffers when
needed, rather than potentially reusing contents.
2004-04-17 19:23:15 +00:00
Mark Murray
55636152d5 Attempts to make this device Giant-free were ill-conceived as
uiomove(9) is not properly locked. So, return to NEEDGIANT
mode. Later, when uiomove is finely locked, I'll revisit.

While I'm here, provide some temporary debugging output to
help catch blocking startups.
2004-04-16 17:10:54 +00:00
Mark Murray
2a8b87d883 Default to harvesting everything. This is to help give a faster
startup. harvesting can be turned OFF in etc/rc.d/* if it is a
burden.
2004-04-16 17:07:11 +00:00
Mark Murray
f587c6bf9f Fix "sleeping without a mutex" panic. 2004-04-12 09:13:24 +00:00
Yoshihiro Takahashi
55fda92f91 Fix pc98 build. 2004-04-11 09:13:42 +00:00
Mark Murray
e7806b4c0e Reorganise the entropy device so that high-yield entropy sources
can more easily be used INSTEAD OF the hard-working Yarrow.
The only hardware source used at this point is the one inside
the VIA C3 Nehemiah (Stepping 3 and above) CPU. More sources will
be added in due course. Contributions welcome!
2004-04-09 15:47:10 +00:00
John Baldwin
6074439965 kthread_exit() no longer requires Giant, so don't force callers to acquire
Giant just to call kthread_exit().

Requested by:	many
2004-03-05 22:42:17 +00:00
Poul-Henning Kamp
dc08ffec87 Device megapatch 4/6:
Introduce d_version field in struct cdevsw, this must always be
initialized to D_VERSION.

Flip sense of D_NOGIANT flag to D_NEEDGIANT, this involves removing
four D_NOGIANT flags and adding 145 D_NEEDGIANT flags.
2004-02-21 21:10:55 +00:00
Poul-Henning Kamp
74cf585544 Correct the cleanup of the alias dev_t for /dev/urandom: being an
alias it depends on the aliased dev_t and disappears automatically
when that is removed.

Submitted by:	"Bjoern A. Zeeb" <bzeeb+freebsd@zabbadoz.net>
2004-02-12 20:46:49 +00:00
Mark Murray
4e3a7a14d9 Fix a major faux pas of mine. I was causing 2 very bad things to
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:	*
2003-11-20 15:35:48 +00:00
Mark Murray
0887c8c110 Overhaul the entropy device:
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.
2003-11-17 23:02:21 +00:00
Seigo Tanimura
512824f8f7 - Implement selwakeuppri() which allows raising the priority of a
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
2003-11-09 09:17:26 +00:00
Mark Murray
f757589236 Make sure we get all user-written input. This simplifies the
code considerably.

Submitted by:	(forgotten)
[I'll happily acknowledge the submitter if he owns up!]
2003-11-02 10:55:16 +00:00
David E. O'Brien
aad970f1fe Use __FBSDID().
Also some minor style cleanups.
2003-08-24 17:55:58 +00:00
Poul-Henning Kamp
68c2a41e6c Change the sleep identifier to "-" where random normally sleeps. 2003-07-02 08:04:57 +00:00
Poul-Henning Kamp
7ac40f5f59 Gigacommit to improve device-driver source compatibility between
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)
2003-03-03 12:15:54 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Andrey A. Chernov
952b6153de Remove srandom():
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
2003-02-05 15:56:04 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Mark Murray
340a8a91c3 Fix a buffer overrun in /dev/random which, due to the nature of the
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)
2002-12-12 17:38:45 +00:00
Scott Long
316ec49abd Some kernel threads try to do significant work, and the default KSTACK_PAGES
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
2002-10-02 07:44:29 +00:00
Mark Murray
a0a95acece Remove #ifdef'ed Giant mutex wrappers round debugging statements. 2002-09-21 21:44:19 +00:00
Mark Murray
b0186e2c5c No functional change. Fix comments and whitespace. 2002-09-21 21:40:02 +00:00
Mark Murray
bbf09ad887 Upgrade the random device to use a "real" hash instead of building
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.
2002-07-15 13:58:35 +00:00
Mark Murray
815eb79cb8 Fix really dumb braino of mine; cast a sizeof() to an int, which it is
being compared to, not size_t, which it already is.
2002-04-21 11:02:36 +00:00
John Baldwin
6008862bc2 Change callers of mtx_init() to pass in an appropriate lock type name. In
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
2002-04-04 21:03:38 +00:00
John Baldwin
44731cab3b Change the suser() API to take advantage of td_ucred as well as do a
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@
2002-04-01 21:31:13 +00:00
Mark Murray
4a7cdfd7b9 Provide infrastructure for harvesting SWI entropy. 2002-03-03 20:09:42 +00:00
Mark Murray
e119960112 Massive lint-inspired cleanup.
Remove unneeded includes.
Deal with unused function arguments.
Resolve a boatload of signed/unsigned imcompatabilities.
Etc.
2002-03-03 19:44:22 +00:00
John Baldwin
a854ed9893 Simple p_ucred -> td_ucred changes to start using the per-thread ucred
reference.
2002-02-27 18:32:23 +00:00
Mike Smith
5390e1bc8f Staticise the random_state array.
Reviewed by:	markm
2002-01-10 00:09:21 +00:00
Robert Watson
19f1565901 o Modify open() and close() for /dev/random to use securelevel_gt() instead
of direct securelevel variable checks.

Obtained from:	TrustedBSD Project
2001-09-26 20:15:42 +00:00
John Baldwin
ed01445d8f Use the passed in thread to selrecord() instead of curthread. 2001-09-21 22:46:54 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
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
2001-09-12 08:38:13 +00:00
Peter Wemm
4b53602153 Fix a minor buglet/typo here that gcc3 complains about. 2001-09-10 01:27:23 +00:00
Mark Murray
87242f3724 Fix type warnings.
PR: 29101
2001-07-20 08:58:04 +00:00
Mark Murray
fb919e4d5a Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
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)
2001-05-01 08:13:21 +00:00
John Baldwin
f34fa851e0 Catch up to header include changes:
- <sys/mutex.h> now requires <sys/systm.h>
- <sys/mutex.h> and <sys/sx.h> now require <sys/lock.h>
2001-03-28 09:17:56 +00:00
Mark Murray
d2de224265 Fix nasty corruption problem where a 64bit variable was being used
(overflowed) to catch a 256bit result.

Hard work done by:	jhb
2001-03-28 06:27:42 +00:00
Poul-Henning Kamp
f83880518b Send the remains (such as I have located) of "block major numbers" to
the bit-bucket.
2001-03-26 12:41:29 +00:00
Mark Murray
41bc9751be Allow bog-standard ioctls through. There are really handled in
higher layers, but there needs to be a "no-error" return here.
2001-03-25 06:55:19 +00:00
Mark Murray
02880f27f4 Silence (harmless) warnings. 2001-03-24 08:38:42 +00:00
Mark Murray
02c986ab54 Very large makeover of the /dev/random driver.
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.
2001-03-10 12:51:55 +00:00
Mark Murray
61e934f038 Take down a comment that is no longer true.
/dev/random is ready for prime time!
2001-03-03 14:35:01 +00:00
Mark Murray
14636c3b51 Provide the infrastructure for sysadmins to select the broad class
of entropy harvesting they wish to perform: "ethernet" (LAN),
point-to-point and interrupt.
2001-02-18 17:40:47 +00:00
Mark Murray
d70736850e Make a big improvement to entropy-harvesting speed by not having any
locks (only atomic assigns) in the harvest ringbuffer.
2001-02-11 16:21:35 +00:00