Date: Sun, 14 Mar 1999 08:18:44 +0200 From: Mark Murray <mark@grondar.za> To: Greg Lehey <grog@lemis.com> Cc: hackers@FreeBSD.ORG Subject: Re: Randomness and vnodes Message-ID: <199903140618.IAA64577@greenpeace.grondar.za> In-Reply-To: Your message of " Sun, 14 Mar 1999 11:28:07 %2B1030." <19990314112807.K429@lemis.com> References: <199903131704.TAA97969@greenpeace.grondar.za> <19990314112807.K429@lemis.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Greg Lehey wrote: > On Saturday, 13 March 1999 at 19:04:19 +0200, Mark Murray wrote: > > Hi > > > > One for you filesystem types; of all the parts of a struct vnode, > > which are the most dynamic? Which would be the most usable as > > input for an entropy collector running in the namei cache? > > > > The ones I am most interested in are the simple types; pointers, > > ints (short or long) or chars. Volatile would be good :-) > > Depends on how many bits you want. Most pointers will have the top 4 > bits set and the bottom 2 bits cleared. Why do you want to use a > vnode? I don't care, as long as there is some entropy. I want to add a entropy harvester into the namei cache, and if I can also pass in some genuine junk, that helps things. For interrupts, the interrupt number is used; for the keyboard, scancodes; the available environmental stuff in the namei cache is centred around vnodes, so I'm looking for dirt in them. Heck - I may just xor the whole thing into an int to get some junk if necessary. M -- Mark Murray Join the anti-SPAM movement: http://www.cauce.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199903140618.IAA64577>