Subject: Re: problem with tmpfs and linux emulation?
To: Christos Zoulas <email@example.com>
From: Jaromir Dolecek <jdolecek@NetBSD.org>
Date: 11/12/2005 21:20:31
On Sat, Nov 12, 2005 at 07:23:40PM +0000, Christos Zoulas wrote:
> >> Presumably, though, the behavior of linux_sys_read would have to depend
> >> on the underlying file system type -- it does the right thing for, say,
> >> ffs and ext2fs, but not for tmpfs.
> >But it only work by "accident", not intention. This method should be used for
> >all filesystems, not just tmpfs. It's a bit more inefficient, but more correct.
> I don't think that linux uses read to read directories. I think it always
> uses getdents. Something else must be going on. Can someone verify by using
The most likely suspect is tmpfs_readdir()'s cookie handling.
BTW, is there any reason tmpfs diverges significantly from the
filesystem code style? Like ((struct vop_lookup_args *)v)->a_dvp
assignments and --------------------- separators between functions.
Jaromir Dolecek <jdolecek@NetBSD.org> http://www.NetBSD.cz/
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