Date: Thu, 04 Jun 2009 09:10:33 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: cooper <bo.coopci@i-waihui.com> Cc: freebsd-geom@freebsd.org Subject: Re: Questions about g_mbr and g_bsd Message-ID: <10765.1244106633@critter.freebsd.dk> In-Reply-To: Your message of "Thu, 04 Jun 2009 16:31:41 %2B0800." <4A27866D.6010103@gmail.com>
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In message <4A27866D.6010103@gmail.com>, cooper writes: >g_mbr_start and g_bsd_start care only if (bp->bio_cmd == BIO_GETATTR). >Does anyone know why they neither do somthing similar to g_disk_start >nor invoke the underlying g_disk? No they dont, all other request types are handled by the "slicer" code which they control with data structures describing the layout. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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