netfilter: xtables: move extension arguments into compound structure (5/6)

This patch does this for target extensions' checkentry functions.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>

9 files changed, 48 insertions, 63 deletions

diff --git a/net/bridge/netfilter/ebt_arpreply.c b/net/bridge/netfilter/ebt_arpreply.c
index fc94699..76584cd 100644
--- a/net/bridge/netfilter/ebt_arpreply.c
+++ b/net/bridge/netfilter/ebt_arpreply.c
@@ -57,20 +57,16 @@ ebt_arpreply_tg(struct sk_buff *skb, const struct xt_target_param *par)
 	return info->target;
 }
 
-static bool
-ebt_arpreply_tg_check(const char *tablename, const void *entry,
-		      const struct xt_target *target, void *data,
-		      unsigned int hookmask)
+static bool ebt_arpreply_tg_check(const struct xt_tgchk_param *par)
 {
-	const struct ebt_arpreply_info *info = data;
-	const struct ebt_entry *e = entry;
+	const struct ebt_arpreply_info *info = par->targinfo;
+	const struct ebt_entry *e = par->entryinfo;
 
 	if (BASE_CHAIN && info->target == EBT_RETURN)
 		return false;
 	if (e->ethproto != htons(ETH_P_ARP) ||
 	    e->invflags & EBT_IPROTO)
 		return false;
-	CLEAR_BASE_CHAIN_BIT;
 	return true;
 }
 
diff --git a/net/bridge/netfilter/ebt_dnat.c b/net/bridge/netfilter/ebt_dnat.c
index bb5d79e..6b49ea9 100644
--- a/net/bridge/netfilter/ebt_dnat.c
+++ b/net/bridge/netfilter/ebt_dnat.c
@@ -26,19 +26,20 @@ ebt_dnat_tg(struct sk_buff *skb, const struct xt_target_param *par)
 	return info->target;
 }
 
-static bool
-ebt_dnat_tg_check(const char *tablename, const void *entry,
-		  const struct xt_target *target, void *data,
-		  unsigned int hookmask)
+static bool ebt_dnat_tg_check(const struct xt_tgchk_param *par)
 {
-	const struct ebt_nat_info *info = data;
+	const struct ebt_nat_info *info = par->targinfo;
+	unsigned int hook_mask;
 
 	if (BASE_CHAIN && info->target == EBT_RETURN)
 		return false;
-	CLEAR_BASE_CHAIN_BIT;
-	if ( (strcmp(tablename, "nat") ||
-	   (hookmask & ~((1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_OUT)))) &&
-	   (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) )
+
+	hook_mask = par->hook_mask & ~(1 << NF_BR_NUMHOOKS);
+	if ((strcmp(par->table, "nat") != 0 ||
+	    (hook_mask & ~((1 << NF_BR_PRE_ROUTING) |
+	    (1 << NF_BR_LOCAL_OUT)))) &&
+	    (strcmp(par->table, "broute") != 0 ||
+	    hook_mask & ~(1 << NF_BR_BROUTING)))
 		return false;
 	if (INVALID_TARGET)
 		return false;
diff --git a/net/bridge/netfilter/ebt_log.c b/net/bridge/netfilter/ebt_log.c
index 87de5fc..3d33c60 100644
--- a/net/bridge/netfilter/ebt_log.c
+++ b/net/bridge/netfilter/ebt_log.c
@@ -24,12 +24,9 @@
 
 static DEFINE_SPINLOCK(ebt_log_lock);
 
-static bool
-ebt_log_tg_check(const char *table, const void *entry,
-		 const struct xt_target *target, void *data,
-		 unsigned int hook_mask)
+static bool ebt_log_tg_check(const struct xt_tgchk_param *par)
 {
-	struct ebt_log_info *info = data;
+	struct ebt_log_info *info = par->targinfo;
 
 	if (info->bitmask & ~EBT_LOG_MASK)
 		return false;
diff --git a/net/bridge/netfilter/ebt_mark.c b/net/bridge/netfilter/ebt_mark.c
index aafc456..2fee7e8 100644
--- a/net/bridge/netfilter/ebt_mark.c
+++ b/net/bridge/netfilter/ebt_mark.c
@@ -36,18 +36,14 @@ ebt_mark_tg(struct sk_buff *skb, const struct xt_target_param *par)
 	return info->target | ~EBT_VERDICT_BITS;
 }
 
-static bool
-ebt_mark_tg_check(const char *table, const void *e,
-		  const struct xt_target *target, void *data,
-		  unsigned int hookmask)
+static bool ebt_mark_tg_check(const struct xt_tgchk_param *par)
 {
-	const struct ebt_mark_t_info *info = data;
+	const struct ebt_mark_t_info *info = par->targinfo;
 	int tmp;
 
 	tmp = info->target | ~EBT_VERDICT_BITS;
 	if (BASE_CHAIN && tmp == EBT_RETURN)
 		return false;
-	CLEAR_BASE_CHAIN_BIT;
 	if (tmp < -NUM_STANDARD_TARGETS || tmp >= 0)
 		return false;
 	tmp = info->target & ~EBT_VERDICT_BITS;
diff --git a/net/bridge/netfilter/ebt_nflog.c b/net/bridge/netfilter/ebt_nflog.c
index 6a28d99..2a63d996 100644
--- a/net/bridge/netfilter/ebt_nflog.c
+++ b/net/bridge/netfilter/ebt_nflog.c
@@ -35,12 +35,9 @@ ebt_nflog_tg(struct sk_buff *skb, const struct xt_target_param *par)
 	return EBT_CONTINUE;
 }
 
-static bool
-ebt_nflog_tg_check(const char *table, const void *e,
-		   const struct xt_target *target, void *data,
-		   unsigned int hookmask)
+static bool ebt_nflog_tg_check(const struct xt_tgchk_param *par)
 {
-	struct ebt_nflog_info *info = data;
+	struct ebt_nflog_info *info = par->targinfo;
 
 	if (info->flags & ~EBT_NFLOG_MASK)
 		return false;
diff --git a/net/bridge/netfilter/ebt_redirect.c b/net/bridge/netfilter/ebt_redirect.c
index 0cfe2fa..c8a49f7 100644
--- a/net/bridge/netfilter/ebt_redirect.c
+++ b/net/bridge/netfilter/ebt_redirect.c
@@ -32,18 +32,19 @@ ebt_redirect_tg(struct sk_buff *skb, const struct xt_target_param *par)
 	return info->target;
 }
 
-static bool
-ebt_redirect_tg_check(const char *tablename, const void *e,
-		      const struct xt_target *target, void *data,
-		      unsigned int hookmask)
+static bool ebt_redirect_tg_check(const struct xt_tgchk_param *par)
 {
-	const struct ebt_redirect_info *info = data;
+	const struct ebt_redirect_info *info = par->targinfo;
+	unsigned int hook_mask;
 
 	if (BASE_CHAIN && info->target == EBT_RETURN)
 		return false;
-	CLEAR_BASE_CHAIN_BIT;
-	if ( (strcmp(tablename, "nat") || hookmask & ~(1 << NF_BR_PRE_ROUTING)) &&
-	     (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) )
+
+	hook_mask = par->hook_mask & ~(1 << NF_BR_NUMHOOKS);
+	if ((strcmp(par->table, "nat") != 0 ||
+	    hook_mask & ~(1 << NF_BR_PRE_ROUTING)) &&
+	    (strcmp(par->table, "broute") != 0 ||
+	    hook_mask & ~(1 << NF_BR_BROUTING)))
 		return false;
 	if (INVALID_TARGET)
 		return false;
diff --git a/net/bridge/netfilter/ebt_snat.c b/net/bridge/netfilter/ebt_snat.c
index f55960e..8d04d4c 100644
--- a/net/bridge/netfilter/ebt_snat.c
+++ b/net/bridge/netfilter/ebt_snat.c
@@ -42,18 +42,14 @@ out:
 	return info->target | ~EBT_VERDICT_BITS;
 }
 
-static bool
-ebt_snat_tg_check(const char *tablename, const void *e,
-		  const struct xt_target *target, void *data,
-		  unsigned int hookmask)
+static bool ebt_snat_tg_check(const struct xt_tgchk_param *par)
 {
-	const struct ebt_nat_info *info = data;
+	const struct ebt_nat_info *info = par->targinfo;
 	int tmp;
 
 	tmp = info->target | ~EBT_VERDICT_BITS;
 	if (BASE_CHAIN && tmp == EBT_RETURN)
 		return false;
-	CLEAR_BASE_CHAIN_BIT;
 
 	if (tmp < -NUM_STANDARD_TARGETS || tmp >= 0)
 		return false;
diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c
index bfedf12..2c6d682 100644
--- a/net/bridge/netfilter/ebt_ulog.c
+++ b/net/bridge/netfilter/ebt_ulog.c
@@ -254,12 +254,9 @@ ebt_ulog_tg(struct sk_buff *skb, const struct xt_target_param *par)
 	return EBT_CONTINUE;
 }
 
-static bool
-ebt_ulog_tg_check(const char *table, const void *entry,
-		  const struct xt_target *target, void *data,
-		  unsigned int hookmask)
+static bool ebt_ulog_tg_check(const struct xt_tgchk_param *par)
 {
-	struct ebt_ulog_info *uloginfo = data;
+	struct ebt_ulog_info *uloginfo = par->targinfo;
 
 	if (uloginfo->nlgroup > 31)
 		return false;
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index a1156ba..cf823c2 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -363,9 +363,10 @@ ebt_check_match(struct ebt_entry_match *m, struct xt_mtchk_param *par,
 }
 
 static inline int
-ebt_check_watcher(struct ebt_entry_watcher *w, struct ebt_entry *e,
-   const char *name, unsigned int hookmask, unsigned int *cnt)
+ebt_check_watcher(struct ebt_entry_watcher *w, struct xt_tgchk_param *par,
+		  unsigned int *cnt)
 {
+	const struct ebt_entry *e = par->entryinfo;
 	struct xt_target *watcher;
 	size_t left = ((char *)e + e->target_offset) - (char *)w;
 	int ret;
@@ -383,9 +384,10 @@ ebt_check_watcher(struct ebt_entry_watcher *w, struct ebt_entry *e,
 		return -ENOENT;
 	w->u.watcher = watcher;
 
-	ret = xt_check_target(watcher, NFPROTO_BRIDGE, w->watcher_size,
-	      name, hookmask, e->ethproto, e->invflags & EBT_IPROTO,
-	      e, w->data);
+	par->target   = watcher;
+	par->targinfo = w->data;
+	ret = xt_check_target(par, NFPROTO_BRIDGE, w->watcher_size,
+	      e->ethproto, e->invflags & EBT_IPROTO);
 	if (ret < 0) {
 		module_put(watcher->me);
 		return ret;
@@ -619,6 +621,7 @@ ebt_check_entry(struct ebt_entry *e, struct ebt_table_info *newinfo,
 	size_t gap;
 	int ret;
 	struct xt_mtchk_param mtpar;
+	struct xt_tgchk_param tgpar;
 
 	/* don't mess with the struct ebt_entries */
 	if (e->bitmask == 0)
@@ -660,14 +663,14 @@ ebt_check_entry(struct ebt_entry *e, struct ebt_table_info *newinfo,
 	}
 	i = 0;
 
-	mtpar.table     = name;
-	mtpar.entryinfo = e;
-	mtpar.hook_mask = hookmask;
+	mtpar.table     = tgpar.table     = name;
+	mtpar.entryinfo = tgpar.entryinfo = e;
+	mtpar.hook_mask = tgpar.hook_mask = hookmask;
 	ret = EBT_MATCH_ITERATE(e, ebt_check_match, &mtpar, &i);
 	if (ret != 0)
 		goto cleanup_matches;
 	j = 0;
-	ret = EBT_WATCHER_ITERATE(e, ebt_check_watcher, e, name, hookmask, &j);
+	ret = EBT_WATCHER_ITERATE(e, ebt_check_watcher, &tgpar, &j);
 	if (ret != 0)
 		goto cleanup_watchers;
 	t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
@@ -703,9 +706,10 @@ ebt_check_entry(struct ebt_entry *e, struct ebt_table_info *newinfo,
 		goto cleanup_watchers;
 	}
 
-	ret = xt_check_target(target, NFPROTO_BRIDGE, t->target_size,
-	      name, hookmask, e->ethproto, e->invflags & EBT_IPROTO,
-	      e, t->data);
+	tgpar.target   = target;
+	tgpar.targinfo = t->data;
+	ret = xt_check_target(&tgpar, NFPROTO_BRIDGE, t->target_size,
+	      e->ethproto, e->invflags & EBT_IPROTO);
 	if (ret < 0) {
 		module_put(target->me);
 		goto cleanup_watchers;