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Commit 6e705f56 authored by Florian Westphal's avatar Florian Westphal
Browse files

netfilter: ebtables: mark: add CONFIG_COMPAT support 



Add the required handlers to convert 32 bit
ebtables mark match and match target structs to 64bit layout.

Signed-off-by: default avatarFlorian Westphal <fwestphal@astaro.com>
parent 314ddca3

net/bridge/netfilter/ebt_mark.c

+31 −0
Original line number Diff line number Diff line
@@ -52,6 +52,32 @@ static bool ebt_mark_tg_check(const struct xt_tgchk_param *par) 
		return false;

	return true;

}

#ifdef CONFIG_COMPAT

struct compat_ebt_mark_t_info {

	compat_ulong_t mark;

	compat_uint_t target;

};



static void mark_tg_compat_from_user(void *dst, const void *src)

{

	const struct compat_ebt_mark_t_info *user = src;

	struct ebt_mark_t_info *kern = dst;



	kern->mark = user->mark;

	kern->target = user->target;

}



static int mark_tg_compat_to_user(void __user *dst, const void *src)

{

	struct compat_ebt_mark_t_info __user *user = dst;

	const struct ebt_mark_t_info *kern = src;



	if (put_user(kern->mark, &user->mark) ||

	    put_user(kern->target, &user->target))

		return -EFAULT;

	return 0;

}

#endif



static struct xt_target ebt_mark_tg_reg __read_mostly = {

	.name		= "mark",
@@ -60,6 +86,11 @@ static struct xt_target ebt_mark_tg_reg __read_mostly = { 
	.target		= ebt_mark_tg,

	.checkentry	= ebt_mark_tg_check,

	.targetsize	= sizeof(struct ebt_mark_t_info),

#ifdef CONFIG_COMPAT

	.compatsize	= sizeof(struct compat_ebt_mark_t_info),

	.compat_from_user = mark_tg_compat_from_user,

	.compat_to_user	= mark_tg_compat_to_user,

#endif

	.me		= THIS_MODULE,

};

net/bridge/netfilter/ebt_mark_m.c

+37 −0
Original line number Diff line number Diff line
@@ -35,6 +35,38 @@ static bool ebt_mark_mt_check(const struct xt_mtchk_param *par) 
	return true;

}





#ifdef CONFIG_COMPAT

struct compat_ebt_mark_m_info {

	compat_ulong_t mark, mask;

	uint8_t invert, bitmask;

};



static void mark_mt_compat_from_user(void *dst, const void *src)

{

	const struct compat_ebt_mark_m_info *user = src;

	struct ebt_mark_m_info *kern = dst;



	kern->mark = user->mark;

	kern->mask = user->mask;

	kern->invert = user->invert;

	kern->bitmask = user->bitmask;

}



static int mark_mt_compat_to_user(void __user *dst, const void *src)

{

	struct compat_ebt_mark_m_info __user *user = dst;

	const struct ebt_mark_m_info *kern = src;



	if (put_user(kern->mark, &user->mark) ||

	    put_user(kern->mask, &user->mask) ||

	    put_user(kern->invert, &user->invert) ||

	    put_user(kern->bitmask, &user->bitmask))

		return -EFAULT;

	return 0;

}

#endif



static struct xt_match ebt_mark_mt_reg __read_mostly = {

	.name		= "mark_m",

	.revision	= 0,
@@ -42,6 +74,11 @@ static struct xt_match ebt_mark_mt_reg __read_mostly = { 
	.match		= ebt_mark_mt,

	.checkentry	= ebt_mark_mt_check,

	.matchsize	= sizeof(struct ebt_mark_m_info),

#ifdef CONFIG_COMPAT

	.compatsize	= sizeof(struct compat_ebt_mark_m_info),

	.compat_from_user = mark_mt_compat_from_user,

	.compat_to_user	= mark_mt_compat_to_user,

#endif

	.me		= THIS_MODULE,

};