Date: Fri, 13 Aug 1999 11:26:06 -0700 (PDT) From: Julian Elischer <julian@whistle.com> To: Poul-Henning Kamp <phk@FreeBSD.org> Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/miscfs/specfs spec_vnops.c src/sys/sys conf.h Message-ID: <Pine.BSF.3.95.990813111357.3531A-100000@current1.whistle.com> In-Reply-To: <199908131629.JAA74524@freefall.freebsd.org>
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(yey)
however I discovered in the SLICE code that it woudl be good if the third
operation was:
proc2: close
devsw->modechenge(R/W, 0, proc2 )
on fork:
proc2: close
devsw->modechenge(0, R/W, proc2 )
where the close2() operation is called on all close() operations
On Fri, 13 Aug 1999, Poul-Henning Kamp wrote:
> phk 1999/08/13 09:29:28 PDT
>
> Modified files:
> sys/miscfs/specfs spec_vnops.c
> sys/sys conf.h
> Log:
> Add support for device drivers which want to track all open/close
> operations. This allows a device driver better insight into
> what is going on that the current:
>
> proc1: open /dev/foo R/O
> devsw->open( R/O, proc1 )
> proc2: open /dev/foo R/W
> devsw->open( R/W, proc2 )
> proc2: close
> /* nothing, but device is
> really only R/O open */
> proc1: close
> devsw->close( R/O, proc1 )
>
> Revision Changes Path
> 1.95 +18 -59 src/sys/miscfs/specfs/spec_vnops.c
> 1.72 +3 -2 src/sys/sys/conf.h
>
>
>
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