AW: [PATCH] sun disk label: fix signed int usage for sector count

["Jurzitza, Dieter" <DJurzitza@harmanbecker.com>]

Dear listmembers,
referring to my own question (and to Jeff Mahoneys email), would it be sufficient to simply change

- --- linux-2.6.17/fs/partitions/sun.c	2006-01-02 22:21:10.000000000 -0500
+++ linux-2.6.17.fix/fs/partitions/sun.c	2006-08-26 11:54:54.000000000 -0400
@@ -74,10 +74,10 @@ int sun_partition(struct parsed_partitio
 	spc = be16_to_cpu(label->ntrks) * be16_to_cpu(label->nsect);
 	for (i = 0; i < 8; i++, p++) {
 		unsigned long st_sector;
- -		int num_sectors;
+		unsigned int num_sectors;
 
 		st_sector = be32_to_cpu(p->start_cylinder) * spc;
 		num_sectors = be32_to_cpu(p->num_sectors);

in order to get rid of the meaningless negative numbers? If possible this would be highly preferrable over a solution that renders this partition useless. If Sun Os cannot handle this, maybe an error message when configuring such a disk would be helpful.

Once again, thank you for your feedback,
best regards




Dieter Jurzitza


-- 
________________________________________________

HARMAN BECKER AUTOMOTIVE SYSTEMS

Dr.-Ing. Dieter Jurzitza
Manager Hardware Systems
   System Development

Industriegebiet Ittersbach
Becker-Göring Str. 16
D-76307 Karlsbad / Germany

Phone: +49 (0)7248 71-1577
Fax:   +49 (0)7248 71-1216
eMail: DJurzitza@harmanbecker.com
Internet: http://www.becker.de
 

> -----Ursprüngliche Nachricht-----
> Von: linux-kernel-owner@vger.kernel.org 
> [mailto:linux-kernel-owner@vger.kernel.org] Im Auftrag von 
> Jurzitza, Dieter
> Gesendet: Dienstag, 29. August 2006 06:52
> An: linux-kernel@vger.kernel.org
> Betreff: [PATCH] sun disk label: fix signed int usage for sector count
> 
> 
> Dear listmembers,
> citing Jeff Mahoney:
> 
> > I'm not sure how many people out there are using Sun disk 
> labels with 
> > sizes > 1TB. It seems like a pretty rare corner case, but 
> there's no 
> > reason any data stored in those partitions wouldn't be 
> invalid, and it 
> > will suddenly cut them off. Is this a rare enough 
> occurrence that we 
> > don't care?
> 
> I am one of those guys using Sun disklabels with sizes > 1TB. 
> And I would highly appreciate if nobody out there would make 
> my disk drive useless by simply discarding anything larger 
> than 1 TB. This would render our department server useless, 
> what is everything but desirable :-)
> 
> Fdisk says:
> 
> Kommando (m für Hilfe): 
> Disk /dev/sda (Sun disk label): 1024 heads, 63 sectors, 36187 
> cylinders Units = Zylinder of 64512 * 512 bytes
> 
>     Gerät Flag    Start       End    Blocks   Id  System
> /dev/sda1             0         1     32256   83  Linux native
> /dev/sda2  u          1        64   2032128   82  Linux Swap
> /dev/sda3             0     36187 -980235776    5  Whole disk
> /dev/sda4            64       320   8257536    1  Boot
> /dev/sda5           320      4864 146571264   83  Linux native
> /dev/sda6          4864     16384 371589120   83  Linux native
> /dev/sda7         16384     36187 638765568   83  Linux native
> 
> Kommando (m für Hilfe): 
> 
> cat /proc/partitions says:
> /home/fred> cat /proc/partitions 
> major minor  #blocks  name
> 
>    8     0 1171874880 sda
>    8     1      32256 sda1
>    8     2    2032128 sda2
>    8     3 -980235776 sda3
>    8     4    8257536 sda4
>    8     5  146571264 sda5
>    8     6  371589120 sda6
>    8     7  638765568 sda7
> 
> but do not leave sda3 useless by changing the code. If there 
> would be a chance to make fdisk and /proc/partitions not to 
> display negative numbers (since, though obvious, they are 
> nonsense) it would be preferrable.
> 
> Many thanks for your help,
> take care
> 
> 
> Dieter Jurzitza
> 
> -- 
> ________________________________________________
> 
> HARMAN BECKER AUTOMOTIVE SYSTEMS
> 
> Dr.-Ing. Dieter Jurzitza
> Manager Hardware Systems
>    System Development
> 
> Industriegebiet Ittersbach
> Becker-Göring Str. 16
> D-76307 Karlsbad / Germany
> 
> Phone: +49 (0)7248 71-1577
> Fax:   +49 (0)7248 71-1216
> eMail: DJurzitza@harmanbecker.com
> Internet: http://www.becker.de
>  
> 
> 
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