Re: Q: large files in iso9660 ?

[Vladimir Saveliev <vs@namesys.com>]

Hello

On Wed, 2004-02-04 at 00:10, P. Christeas wrote:
> >
> > The kernel (2.6 and 2.4) has the following code in isofs_read_inode():
> >
> >         /*
> >          * The ISO-9660 filesystem only stores 32 bits for file size.
> >          * mkisofs handles files up to 2GB-2 = 2147483646 = 0x7FFFFFFE
> > bytes * in size. This is according to the large file summit paper from
> > 1996. * WARNING: ISO-9660 filesystems > 1 GB and even > 2 GB are fully *   
> >       legal. Do not prevent to use DVD's schilling@fokus.gmd.de */
> >         if ((inode->i_size < 0 || inode->i_size > 0x7FFFFFFE) &&
> >             sbi->s_cruft == 'n') {
> >                 printk(KERN_WARNING "Warning: defective CD-ROM.  "
> >                        "Enabling \"cruft\" mount option.\n");
> >                 sbi->s_cruft = 'y';
> >         }
> >
> > IOW: your kernel should have warned you about the defective CDROM and
> > truncated filesizes to 16MB (which is what the "cruft" mount option
> > does).
> >
> >
> > Erik
> 
> Makes perfect sense.
> However, this *does* enforce the limit on DVD files. If I try to disable this 
> code and make inode sizes uint32, can there be any other negative 
> implication? Of course, I am still limited to 3GB..

IIRC, mkisofs can create HFS. There should be no problem with that long
files


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