ISO9660 file size limitation

From: Wakko Warner (wakko_at_animx.eu.org)
Date: 11/18/04

  • Next message: Bodo Eggert: "Re: vm-pageout-throttling.patch: hanging in throttle_vm_writeout/blk_congestion_wait" 
    Date:	Wed, 17 Nov 2004 18:14:38 -0500
To: linux-kernel@vger.kernel.org

    I just came across this today after burning backups to dvd-r. The file that
    caused the problem is 2,471,265,365 bytes. After searching a little bit
    I found that the kernel doesn't like the size even though it's valid (That
    is from what I read). So I did this:

    --- inode.c-old 2004-11-17 17:50:51.000000000 -0500
    +++ inode.c 2004-11-17 17:57:44.000000000 -0500
    @@ -1218,12 +1218,16 @@
              * 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 0
             if ((inode->i_size < 0 || inode->i_size > 0x7FFFFFFE) &&
                 inode->i_sb->u.isofs_sb.s_cruft == 'n') {
                     printk(KERN_WARNING "Warning: defective CD-ROM. "
                            "Enabling \"cruft\" mount option.\n");
                     inode->i_sb->u.isofs_sb.s_cruft = 'y';
             }
    +#else
    + inode->i_size &= 0xFFFFFFFF;
    +#endif
     
             /*
              * Some dip*** decided to store some other bit of information

    It seems to work for me, but I would like to know if doing this might cause
    problems. The large file is a tar.gz. After doing the above modification
    and loading the module, I ran gzip -t on the file. gzip reported the file
    was ok. With out doing "inode->i_size &= 0xFFFFFFFF", I noticed that the
    file size was 18446744071885849685 (0xFFFFFFFF934C8455) 

    -- 
 Lab tests show that use of micro$oft causes cancer in lab animals
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  • Next message: Bodo Eggert: "Re: vm-pageout-throttling.patch: hanging in throttle_vm_writeout/blk_congestion_wait"