Commit bc80b656 authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller
Browse files

[NETFILTER]: xt_mark: add compat conversion functions 



Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9fa492cd

net/netfilter/xt_mark.c

+36 −0
Original line number Diff line number Diff line
@@ -50,6 +50,37 @@ checkentry(const char *tablename, 
	return 1;

}



#ifdef CONFIG_COMPAT

struct compat_xt_mark_info {

	compat_ulong_t	mark, mask;

	u_int8_t	invert;

	u_int8_t	__pad1;

	u_int16_t	__pad2;

};



static void compat_from_user(void *dst, void *src)

{

	struct compat_xt_mark_info *cm = src;

	struct xt_mark_info m = {

		.mark	= cm->mark,

		.mask	= cm->mask,

		.invert	= cm->invert,

	};

	memcpy(dst, &m, sizeof(m));

}



static int compat_to_user(void __user *dst, void *src)

{

	struct xt_mark_info *m = src;

	struct compat_xt_mark_info cm = {

		.mark	= m->mark,

		.mask	= m->mask,

		.invert	= m->invert,

	};

	return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0;

}

#endif /* CONFIG_COMPAT */



static struct xt_match xt_mark_match[] = {

	{

		.name		= "mark",
@@ -57,6 +88,11 @@ static struct xt_match xt_mark_match[] = { 
		.checkentry	= checkentry,

		.match		= match,

		.matchsize	= sizeof(struct xt_mark_info),

#ifdef CONFIG_COMPAT

		.compatsize	= sizeof(struct compat_xt_mark_info),

		.compat_from_user = compat_from_user,

		.compat_to_user	= compat_to_user,

#endif

		.me		= THIS_MODULE,

	},

	{