Re: 2.5.2-pre7 still missing bits of kdev_t

From: Jeff Garzik (
Date: Fri Jan 04 2002 - 01:52:51 EST

Linus Torvalds wrote:
> On Thu, 3 Jan 2002, Jeff Garzik wrote:
> >
> > reiserfs is blindly storing the kernel's kdev_t value raw to disk.
> Well, it won't do that. You have to use "kdev_t_to_nr()", which (whenever
> the format of kdev_t changes) will still be identical in the low 16 bits.
> Now, if somebody actually has the raw "kdev_t" in their on-disk
> structures, that's a real problem, but I don't think anybody does.
> Certainly I didn't see reiserfs do it (but it may well be missing a few
> "kdev_t_to_nr()" calls)

AFAICS it does:

#define sd_v1_rdev(sdp) (le32_to_cpu((sdp)->u.sd_rdev))
#define set_sd_v1_rdev(sdp,v) ((sdp)->u.sd_rdev = cpu_to_le32(v))

[jgarzik@rum reiserfs]$ grep v1_rdev *.c
inode.c: rdev = sd_v1_rdev(sd);
inode.c: set_sd_v1_rdev(sd_v1, inode->i_rdev );

In the first inode.c line shown here, it passes the value received
directly to init_special_inode.


Jeff Garzik      | Only so many songs can be sung
Building 1024    | with two lips, two lungs, and one tongue.
MandrakeSoft     |         - nomeansno
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