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: Florian Westphal <fwestphal@astaro.com>
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@ -52,6 +52,32 @@ static bool ebt_mark_tg_check(const struct xt_tgchk_param *par)
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return false;
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return true;
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}
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#ifdef CONFIG_COMPAT
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struct compat_ebt_mark_t_info {
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compat_ulong_t mark;
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compat_uint_t target;
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};
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static void mark_tg_compat_from_user(void *dst, const void *src)
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{
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const struct compat_ebt_mark_t_info *user = src;
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struct ebt_mark_t_info *kern = dst;
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kern->mark = user->mark;
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kern->target = user->target;
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}
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static int mark_tg_compat_to_user(void __user *dst, const void *src)
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{
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struct compat_ebt_mark_t_info __user *user = dst;
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const struct ebt_mark_t_info *kern = src;
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if (put_user(kern->mark, &user->mark) ||
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put_user(kern->target, &user->target))
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return -EFAULT;
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return 0;
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}
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#endif
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static struct xt_target ebt_mark_tg_reg __read_mostly = {
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.name = "mark",
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@ -60,6 +86,11 @@ static struct xt_target ebt_mark_tg_reg __read_mostly = {
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.target = ebt_mark_tg,
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.checkentry = ebt_mark_tg_check,
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.targetsize = sizeof(struct ebt_mark_t_info),
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#ifdef CONFIG_COMPAT
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.compatsize = sizeof(struct compat_ebt_mark_t_info),
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.compat_from_user = mark_tg_compat_from_user,
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.compat_to_user = mark_tg_compat_to_user,
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#endif
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.me = THIS_MODULE,
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};
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@ -35,6 +35,38 @@ static bool ebt_mark_mt_check(const struct xt_mtchk_param *par)
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return true;
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}
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#ifdef CONFIG_COMPAT
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struct compat_ebt_mark_m_info {
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compat_ulong_t mark, mask;
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uint8_t invert, bitmask;
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};
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static void mark_mt_compat_from_user(void *dst, const void *src)
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{
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const struct compat_ebt_mark_m_info *user = src;
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struct ebt_mark_m_info *kern = dst;
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kern->mark = user->mark;
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kern->mask = user->mask;
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kern->invert = user->invert;
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kern->bitmask = user->bitmask;
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}
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static int mark_mt_compat_to_user(void __user *dst, const void *src)
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{
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struct compat_ebt_mark_m_info __user *user = dst;
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const struct ebt_mark_m_info *kern = src;
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if (put_user(kern->mark, &user->mark) ||
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put_user(kern->mask, &user->mask) ||
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put_user(kern->invert, &user->invert) ||
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put_user(kern->bitmask, &user->bitmask))
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return -EFAULT;
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return 0;
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}
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#endif
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static struct xt_match ebt_mark_mt_reg __read_mostly = {
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.name = "mark_m",
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.revision = 0,
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@ -42,6 +74,11 @@ static struct xt_match ebt_mark_mt_reg __read_mostly = {
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.match = ebt_mark_mt,
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.checkentry = ebt_mark_mt_check,
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.matchsize = sizeof(struct ebt_mark_m_info),
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#ifdef CONFIG_COMPAT
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.compatsize = sizeof(struct compat_ebt_mark_m_info),
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.compat_from_user = mark_mt_compat_from_user,
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.compat_to_user = mark_mt_compat_to_user,
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#endif
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.me = THIS_MODULE,
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};
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