netfilter: xtables: move extension arguments into compound structure (3/6)

This patch does this for match extensions' destroy functions.

Signed-off-by: Jan Engelhardt <[e-mail]>
Signed-off-by: Patrick McHardy <[e-mail]>

include/linux/netfilter/x_tables.h

···
 	unsigned int hook_mask;
 };
 
+/* Match destructor parameters */
+struct xt_mtdtor_param {
+	const struct xt_match *match;
+	void *matchinfo;
+};
+
 struct xt_match
 {
 	struct list_head list;
···
 	bool (*checkentry)(const struct xt_mtchk_param *);
 
 	/* Called when entry of this type deleted. */
-	void (*destroy)(const struct xt_match *match, void *matchinfo);
+	void (*destroy)(const struct xt_mtdtor_param *);
 
 	/* Called when userspace align differs from kernel space one */
 	void (*compat_from_user)(void *dst, void *src);

net/bridge/netfilter/ebtables.c

···
 static inline int
 ebt_cleanup_match(struct ebt_entry_match *m, unsigned int *i)
 {
+	struct xt_mtdtor_param par;
+
 	if (i && (*i)-- == 0)
 		return 1;
-	if (m->u.match->destroy)
-		m->u.match->destroy(m->u.match, m->data);
-	module_put(m->u.match->me);
 
+	par.match     = m->u.match;
+	par.matchinfo = m->data;
+	if (par.match->destroy != NULL)
+		par.match->destroy(&par);
+	module_put(par.match->me);
 	return 0;
 }
 
···
 	unsigned int i, j, hook = 0, hookmask = 0;
 	size_t gap;
 	int ret;
-	struct xt_mtchk_param par;
+	struct xt_mtchk_param mtpar;
 
 	/* don't mess with the struct ebt_entries */
 	if (e->bitmask == 0)
···
 	}
 	i = 0;
 
-	par.table     = name;
-	par.entryinfo = e;
-	par.hook_mask = hookmask;
-	ret = EBT_MATCH_ITERATE(e, ebt_check_match, &par, &i);
+	mtpar.table     = name;
+	mtpar.entryinfo = e;
+	mtpar.hook_mask = hookmask;
+	ret = EBT_MATCH_ITERATE(e, ebt_check_match, &mtpar, &i);
 	if (ret != 0)
 		goto cleanup_matches;
 	j = 0;

net/ipv4/netfilter/ip_tables.c

···
 static int
 cleanup_match(struct ipt_entry_match *m, unsigned int *i)
 {
+	struct xt_mtdtor_param par;
+
 	if (i && (*i)-- == 0)
 		return 1;
 
-	if (m->u.kernel.match->destroy)
-		m->u.kernel.match->destroy(m->u.kernel.match, m->data);
-	module_put(m->u.kernel.match->me);
+	par.match     = m->u.kernel.match;
+	par.matchinfo = m->data;
+	if (par.match->destroy != NULL)
+		par.match->destroy(&par);
+	module_put(par.match->me);
 	return 0;
 }
 

net/ipv6/netfilter/ip6_tables.c

···
 static int
 cleanup_match(struct ip6t_entry_match *m, unsigned int *i)
 {
+	struct xt_mtdtor_param par;
+
 	if (i && (*i)-- == 0)
 		return 1;
 
-	if (m->u.kernel.match->destroy)
-		m->u.kernel.match->destroy(m->u.kernel.match, m->data);
-	module_put(m->u.kernel.match->me);
+	par.match     = m->u.kernel.match;
+	par.matchinfo = m->data;
+	if (par.match->destroy != NULL)
+		par.match->destroy(&par);
+	module_put(par.match->me);
 	return 0;
 }
 

net/netfilter/xt_connbytes.c

···
 	return true;
 }
 
-static void connbytes_mt_destroy(const struct xt_match *match, void *matchinfo)
+static void connbytes_mt_destroy(const struct xt_mtdtor_param *par)
 {
-	nf_ct_l3proto_module_put(match->family);
+	nf_ct_l3proto_module_put(par->match->family);
 }
 
 static struct xt_match connbytes_mt_reg[] __read_mostly = {

net/netfilter/xt_connlimit.c

···
 	return true;
 }
 
-static void
-connlimit_mt_destroy(const struct xt_match *match, void *matchinfo)
+static void connlimit_mt_destroy(const struct xt_mtdtor_param *par)
 {
-	const struct xt_connlimit_info *info = matchinfo;
+	const struct xt_connlimit_info *info = par->matchinfo;
 	struct xt_connlimit_conn *conn;
 	struct xt_connlimit_conn *tmp;
 	struct list_head *hash = info->data->iphash;
 	unsigned int i;
 
-	nf_ct_l3proto_module_put(match->family);
+	nf_ct_l3proto_module_put(par->match->family);
 
 	for (i = 0; i < ARRAY_SIZE(info->data->iphash); ++i) {
 		list_for_each_entry_safe(conn, tmp, &hash[i], list) {

net/netfilter/xt_connmark.c

···
 	return true;
 }
 
-static void
-connmark_mt_destroy(const struct xt_match *match, void *matchinfo)
+static void connmark_mt_destroy(const struct xt_mtdtor_param *par)
 {
-	nf_ct_l3proto_module_put(match->family);
+	nf_ct_l3proto_module_put(par->match->family);
 }
 
 #ifdef CONFIG_COMPAT

net/netfilter/xt_conntrack.c

···
 	return true;
 }
 
-static void
-conntrack_mt_destroy(const struct xt_match *match, void *matchinfo)
+static void conntrack_mt_destroy(const struct xt_mtdtor_param *par)
 {
-	nf_ct_l3proto_module_put(match->family);
+	nf_ct_l3proto_module_put(par->match->family);
 }
 
 #ifdef CONFIG_COMPAT

net/netfilter/xt_hashlimit.c

···
 }
 
 static void
-hashlimit_mt_destroy_v0(const struct xt_match *match, void *matchinfo)
+hashlimit_mt_destroy_v0(const struct xt_mtdtor_param *par)
 {
-	const struct xt_hashlimit_info *r = matchinfo;
+	const struct xt_hashlimit_info *r = par->matchinfo;
 
 	htable_put(r->hinfo);
 }
 
-static void
-hashlimit_mt_destroy(const struct xt_match *match, void *matchinfo)
+static void hashlimit_mt_destroy(const struct xt_mtdtor_param *par)
 {
-	const struct xt_hashlimit_mtinfo1 *info = matchinfo;
+	const struct xt_hashlimit_mtinfo1 *info = par->matchinfo;
 
 	htable_put(info->hinfo);
 }

net/netfilter/xt_helper.c

···
 	return true;
 }
 
-static void helper_mt_destroy(const struct xt_match *match, void *matchinfo)
+static void helper_mt_destroy(const struct xt_mtdtor_param *par)
 {
-	nf_ct_l3proto_module_put(match->family);
+	nf_ct_l3proto_module_put(par->match->family);
 }
 
 static struct xt_match helper_mt_reg[] __read_mostly = {

net/netfilter/xt_rateest.c

···
 	return false;
 }
 
-static void xt_rateest_mt_destroy(const struct xt_match *match,
-				  void *matchinfo)
+static void xt_rateest_mt_destroy(const struct xt_mtdtor_param *par)
 {
-	struct xt_rateest_match_info *info = matchinfo;
+	struct xt_rateest_match_info *info = par->matchinfo;
 
 	xt_rateest_put(info->est1);
 	if (info->est2)

net/netfilter/xt_recent.c

···
 	return ret;
 }
 
-static void recent_mt_destroy(const struct xt_match *match, void *matchinfo)
+static void recent_mt_destroy(const struct xt_mtdtor_param *par)
 {
-	const struct xt_recent_mtinfo *info = matchinfo;
+	const struct xt_recent_mtinfo *info = par->matchinfo;
 	struct recent_table *t;
 
 	mutex_lock(&recent_mutex);

net/netfilter/xt_state.c

···
 	return true;
 }
 
-static void state_mt_destroy(const struct xt_match *match, void *matchinfo)
+static void state_mt_destroy(const struct xt_mtdtor_param *par)
 {
-	nf_ct_l3proto_module_put(match->family);
+	nf_ct_l3proto_module_put(par->match->family);
 }
 
 static struct xt_match state_mt_reg[] __read_mostly = {

net/netfilter/xt_string.c

···
 	return true;
 }
 
-static void string_mt_destroy(const struct xt_match *match, void *matchinfo)
+static void string_mt_destroy(const struct xt_mtdtor_param *par)
 {
-	textsearch_destroy(STRING_TEXT_PRIV(matchinfo)->config);
+	textsearch_destroy(STRING_TEXT_PRIV(par->matchinfo)->config);
 }
 
 static struct xt_match xt_string_mt_reg[] __read_mostly = {