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Date: Mon, 27 Aug 2012 10:55:47 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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To: Luigi Rizzo <rizzo@iet.unipi.it>
References: <20120827073403.GA49223@onelab2.iet.unipi.it>
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Cc: current@FreeBSD.org
Subject: Re: per file descriptor device callbacks ?
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on 27/08/2012 10:34 Luigi Rizzo said the following:
> This requires to track calls to open/ioctl/poll/mmap/close.
> The difficulty i have is with mmap() and close(), because FreeBSD
> seems to handle these calls per-cdev rather than per-file-descriptor
> (for instance, no 'struct file' argument is available in mmap(), and
> the d_close method is only called on the last close() on the device).

devfs_set_cdevpriv(9), etc

-- 
Andriy Gapon