From mboxrd@z Thu Jan  1 00:00:00 1970
From: Julien Grall <julien.grall@linaro.org>
Subject: Re: [PATCH v2 02/21] xen: guestcopy: Provide an helper
 to safely copy string from guest
Date: Wed, 06 Aug 2014 15:22:25 +0100
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To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Keir Fraser <keir@xen.org>, ian.campbell@citrix.com, tim@xen.org, Ian Jackson <ian.jackson@eu.citrix.com>, stefano.stabellini@citrix.com, Jan Beulich <jbeulich@suse.com>, xen-devel@lists.xenproject.org, Daniel De Graaf <dgdegra@tycho.nsa.gov>
List-Id: xen-devel@lists.xenproject.org

Hi Stefano,

On 08/06/2014 02:56 PM, Stefano Stabellini wrote:
>> diff --git a/xen/common/guestcopy.c b/xen/common/guestcopy.c
>> new file mode 100644
>> index 0000000..c01555c
>> --- /dev/null
>> +++ b/xen/common/guestcopy.c
>> @@ -0,0 +1,29 @@
>> +#include <xen/config.h>
>> +#include <xen/lib.h>
>> +#include <xen/guest_access.h>
>> +
>> +/* The function copies a string from the guest and add a NUL-terminated to
>> + * make sure the string is correctly finished. */
>> +int safe_copy_string_from_guest(XEN_GUEST_HANDLE(char) u_buf, char **buf,
>> +                                unsigned long size, unsigned long max_size)
> 
> Why did you change the size type from size_t to unsigned long?

I don't remember why. I will reuse size_t here.

Regards,


-- 
Julien Grall