Date: Wed, 25 Sep 1996 03:19:24 +1000 From: Bruce Evans <bde@zeta.org.au> To: dfr@render.com, michaelh@cet.co.jp Cc: bde@zeta.org.au, fs@FreeBSD.org, lite2@FreeBSD.org Subject: Re: New d_type field in *devsw Message-ID: <199609241719.DAA07851@godzilla.zeta.org.au>
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>There is an existing unused field in bdevsw, d_flags which can be used to >identify disks and tapes for securelevel and ioctl or alternatively the >existing FreeBSD behaviour of calling isdisk() is still possible. The >current behaviour of dead_read is probably also adequate. >Needless to say, these hacks should be first against the wall after the >devfs revolution :-). They are high quality compared with isdisk(). The cross pointers in the devsw's can be be used to share d_flags with the cdevs. However, to use them we would have to modify a lot of device drivers with a temporary change. Bruce
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