src-test2/sys/dev/random/randomdev.h, branch release/7.1.0_cvsFreeBSD source treehttps://cgit-dev.freebsd.org/src-test2/atom?h=release%2F7.1.0_cvs2008-12-31T22:57:14ZCopy releng/7.1 to release/7.1.0 for the 7.1-RELEASE.2008-12-31T22:57:14ZKen Smithkensmith@FreeBSD.org2008-12-31T22:57:14Zurn:sha1:8d4eb975d2e49f56d057a19aac09bcb92b3e71f7
Approved by: re (implicit)
This commit was manufactured to restore the state of the 7.1-RELEASE image.
Remove GIANT from device random.2005-12-20T21:41:52ZPaul Saabps@FreeBSD.org2005-12-20T21:41:52Zurn:sha1:efbbe8fa7938f8ac071095b5b46f621885b447e4
Submitted by: ups
Attempts to make this device Giant-free were ill-conceived as2004-04-16T17:10:54ZMark Murraymarkm@FreeBSD.org2004-04-16T17:10:54Zurn:sha1:55636152d52e4d90702ad06aa8df66f07691a369
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.
Reorganise the entropy device so that high-yield entropy sources2004-04-09T15:47:10ZMark Murraymarkm@FreeBSD.org2004-04-09T15:47:10Zurn:sha1:e7806b4c0eb398aba8b6e8ddeda96e6ddd9305ae
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!
Overhaul the entropy device:2003-11-17T23:02:21ZMark Murraymarkm@FreeBSD.org2003-11-17T23:02:21Zurn:sha1:0887c8c110da2f060bc422e6942320054bcc755d
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.
Massive lint-inspired cleanup.2002-03-03T19:44:22ZMark Murraymarkm@FreeBSD.org2002-03-03T19:44:22Zurn:sha1:e119960112f35b3ec1179e262cccde05b59a0309
Remove unneeded includes.
Deal with unused function arguments.
Resolve a boatload of signed/unsigned imcompatabilities.
Etc.
Fix a minor buglet/typo here that gcc3 complains about.2001-09-10T01:27:23ZPeter Wemmpeter@FreeBSD.org2001-09-10T01:27:23Zurn:sha1:4b53602153262730892060ec7953b5382e023944Very large makeover of the /dev/random driver.2001-03-10T12:51:55ZMark Murraymarkm@FreeBSD.org2001-03-10T12:51:55Zurn:sha1:02c986ab5491cfc84666b5ce658dd7b3508b6b93
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.