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Re: bin/39264: newfs can create a filesystem with > 2^31 inodes
The following reply was made to PR bin/39264; it has been noted by GNATS.
From: David Laight <david%l8s.co.uk@localhost>
Subject: Re: bin/39264: newfs can create a filesystem with > 2^31 inodes
Date: Mon, 4 Aug 2008 22:30:28 +0100
On Fri, Aug 01, 2008 at 03:55:01PM +0000, Simon Burge wrote:
> >Number: 39264
> >Synopsis: newfs can create a filesystem with > 2^31 inodes
> Newfs can create a filesystem with > 2^31 inodes, despite this
> comment in mkfs.c:
> Not sure. We're overflowing with:
> inodes_per_cg = ((inodeblks - 1) / ncg + 1) * INOPB(&sblock);
> I'm not sure of the logic for the -1/+1 here.
It is there to round up the division.
The same as (inodeblks + (ncg - 1)) / ncg would do.
If you have asked newfs to create a filesystem with a specific number of
inodes then it is needed in order to get at least the required number.
David Laight: david%l8s.co.uk@localhost
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