Re: BLKGETSIZE64, BLKBSZSET, BLKSSZGET definition in xfsprogs.

["Kevin P. Fleming" <kpfleming@xxxxxxxxxxxxxxxxxxxx>]

Jan Derfinak wrote:

> There was change in 2.6.0-test5 and linux/fs.h isn't included in
> xfsprogs so xfsprogs uses old definition.
>
>
> > bzcat patch-2.6.0-test5.bz2 | grep -e BLKBSZSET -e BLKGETSIZE64
>
> -#define BLKBSZSET  _IOW(0x12,113,sizeof(int))
> -#define BLKGETSIZE64 _IOR(0x12,114,sizeof(u64))        /* return device size 
> in bytes (u64 *arg) */
> +#define BLKBSZSET  _IOW(0x12,113,size_t)
> +#define BLKGETSIZE64 _IOR(0x12,114,size_t)     /* return device size in bytes 
> (u64 *arg) */

Actually, those definitions will produce the same ioctl number, so 
effectively there is no change. The kernel can't really change ioctl 
numbers once userspace begins using them, because that's an 
incompatible change, so it's fine if a userspace package copies the 
definition of some ioctls and then uses its own copies.