Date: Fri, 29 Sep 2000 02:29:11 -0700 From: Alfred Perlstein <bright@wintelcom.net> To: bsdnewbie bsdnewbie <bsdnewbie@hotmail.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: _use bread(...) to access /dev/ad1 ???!!! Message-ID: <20000929022911.E27736@fw.wintelcom.net> In-Reply-To: <F163Q1B5QDnEDisywkG00007810@hotmail.com>; from bsdnewbie@hotmail.com on Fri, Sep 29, 2000 at 04:58:44PM -0600 References: <F163Q1B5QDnEDisywkG00007810@hotmail.com>
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* bsdnewbie bsdnewbie <bsdnewbie@hotmail.com> [000929 01:58] wrote: > I want to access /dev/ad1 via the strategy function "adstrategy" in the file > "ata-disk.c". > > I can get the dev_t & softc structure of ad1 and no slice on ad1 was > mounted. > > My problem is: > 1) How to call the function adstategy? > > 2) Someone said that the function bread(struct vnode *, ...) can do, but I > do not know how to get the vnode arg. How to use this function? The "man > vnode" said that an active file has a vnode, and in unix, devices are also > files, so it seems that ad1 has a corresponding vnode, but how to get it? > > 3) if bread() is used to read, bwrite() is used to write, why bwrite does > not has the vnode arg while bread have? > I'm guessing it's int bdevvp(dev, vpp) but i may be wrong. -Alfred To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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