Date: Sun, 21 May 2000 20:24:06 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Mark Murray <mark@grondar.za> Cc: Peter Wemm <peter@netplex.com.au>, Doug Rabson <dfr@nlsystems.com>, current@FreeBSD.ORG Subject: Re: Major device numbers and mem device redesign Message-ID: <13824.958933446@critter.freebsd.dk> In-Reply-To: Your message of "Sun, 21 May 2000 16:41:48 %2B0200." <200005211441.QAA16615@grimreaper.grondar.za>
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In message <200005211441.QAA16615@grimreaper.grondar.za>, Mark Murray writes:
>> > > I want to commit a new /dev/random RSN, so I'll be needing a major
>> > > device; what is the procedure for getting one? I know how to steal one,
>> > > but ISTR that this is not how it is done.
>> >
>> > Just edit sys/conf/majors and claim the next available number.
>>
>> You don't need one. You can use the same major/minor numbers. You can
>> register multiple cdevsw's per major number with make_dev(); (do NOT
>> use cdevsw_add() for this).
>
>How does this work for all the routines? When you register the
>"new" minor number, can you be specifying new read/write/poll/ioctl/etc
>routines?
>
>I ask, as my RNG is a kld, and I want it to be as separate as possible
>without getting ridiculous.
make_dev() takes a pointer to your struct cdevsw{} for this particular
minor.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD coreteam member | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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