Date: Thu, 04 Jan 2007 00:51:06 +0200 From: Diomidis Spinellis <dds@aueb.gr> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Filesystem layering Message-ID: <459C335A.1030200@aueb.gr> In-Reply-To: <200701031607.00199.jhb@freebsd.org> References: <459BE218.7070605@aueb.gr> <200701031607.00199.jhb@freebsd.org>
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John Baldwin wrote:
> On Wednesday 03 January 2007 12:04, Diomidis Spinellis wrote:
>> static int
>> umap_bypass(ap)
>> struct vop_generic_args /* {
>> struct vnodeop_desc *a_desc;
>> <other random data follows, presumably>
>> } */ *ap;
>> {
>> /* ... */
>
> In this magic code here this function changes the vnode pointers in
> ap.
I presume you mean the part starting with the comment:
/*
* Map the vnodes going in.
* Later, we'll invoke the operation based on
* the first mapped vnode's operation vector.
*/
Thanks! I don't think I'd guess it by reading the code; I was looking
for a a simple assignment or indirection. My next plan was to add
debugging statements along the way, which would have been quite painful.
Diomidis
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