Questions about g_mbr and g_bsd

[Poul-Henning Kamp]

In message <4A27866D.6010103 at 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 at 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.