linux-kernel - Re: [PATCH] [RFC] Time-based RFC 4122 UUID generator

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Message-ID: <20668.1191728530@turing-police.cc.vt.edu>
Date:	Sat, 06 Oct 2007 23:42:10 -0400
From:	Valdis.Kletnieks@...edu
To:	Helge Deller <deller@....de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [RFC] Time-based RFC 4122 UUID generator

On Sat, 06 Oct 2007 15:53:37 +0200, Helge Deller said:

> diff --git a/drivers/char/random.c b/drivers/char/random.c
> index af274e5..c84a385 100644
> --- a/drivers/char/random.c
> +++ b/drivers/char/random.c
> @@ -239,6 +239,7 @@
>  #include <linux/spinlock.h>
>  #include <linux/percpu.h>
>  #include <linux/cryptohash.h>
> +#include <linux/netdevice.h>
>  
>  #include <asm/processor.h>
>  #include <asm/uaccess.h>
> @@ -1157,6 +1158,8 @@ void generate_random_uuid(unsigned char uuid_out[16])
>  	uuid_out[6] = (uuid_out[6] & 0x0F) | 0x40;
>  	/* Set the UUID variant to DCE */
>  	uuid_out[8] = (uuid_out[8] & 0x3F) | 0x80;
> +	/* Set multicast bit to avoid conflicts with NIC MAC addresses */
> +	uuid_out[10] |= 0x80;
>  }


Erm, was it *intended* that you also changed the behavior of generate_random_uuid()?


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