netfilter: xtables: change matches to return error code

The following semantic patch does part of the transformation:
// <smpl>
@ rule1 @
struct xt_match ops;
identifier check;
@@
 ops.checkentry = check;

@@
identifier rule1.check;
@@
 check(...) { <...
-return true;
+return 0;
 ...> }

@@
identifier rule1.check;
@@
 check(...) { <...
-return false;
+return -EINVAL;
 ...> }
// </smpl>

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

10 files changed, 41 insertions, 41 deletions

diff --git a/net/bridge/netfilter/ebt_802_3.c b/net/bridge/netfilter/ebt_802_3.c
index 7b6f4c4cccb..f7de8dbc342 100644
--- a/net/bridge/netfilter/ebt_802_3.c
+++ b/net/bridge/netfilter/ebt_802_3.c
@@ -41,9 +41,9 @@ static int ebt_802_3_mt_check(const struct xt_mtchk_param *par)
 	const struct ebt_802_3_info *info = par->matchinfo;
 
 	if (info->bitmask & ~EBT_802_3_MASK || info->invflags & ~EBT_802_3_MASK)
-		return false;
+		return -EINVAL;
 
-	return true;
+	return 0;
 }
 
 static struct xt_match ebt_802_3_mt_reg __read_mostly = {
diff --git a/net/bridge/netfilter/ebt_among.c b/net/bridge/netfilter/ebt_among.c
index 8a75d399b51..20068e03fa8 100644
--- a/net/bridge/netfilter/ebt_among.c
+++ b/net/bridge/netfilter/ebt_among.c
@@ -190,17 +190,17 @@ static int ebt_among_mt_check(const struct xt_mtchk_param *par)
 		pr_info("wrong size: %d against expected %d, rounded to %Zd\n",
 			em->match_size, expected_length,
 			EBT_ALIGN(expected_length));
-		return false;
+		return -EINVAL;
 	}
 	if (wh_dst && (err = ebt_mac_wormhash_check_integrity(wh_dst))) {
 		pr_info("dst integrity fail: %x\n", -err);
-		return false;
+		return -EINVAL;
 	}
 	if (wh_src && (err = ebt_mac_wormhash_check_integrity(wh_src))) {
 		pr_info("src integrity fail: %x\n", -err);
-		return false;
+		return -EINVAL;
 	}
-	return true;
+	return 0;
 }
 
 static struct xt_match ebt_among_mt_reg __read_mostly = {
diff --git a/net/bridge/netfilter/ebt_arp.c b/net/bridge/netfilter/ebt_arp.c
index fc62055adb1..952150cd5e7 100644
--- a/net/bridge/netfilter/ebt_arp.c
+++ b/net/bridge/netfilter/ebt_arp.c
@@ -108,10 +108,10 @@ static int ebt_arp_mt_check(const struct xt_mtchk_param *par)
 	if ((e->ethproto != htons(ETH_P_ARP) &&
 	   e->ethproto != htons(ETH_P_RARP)) ||
 	   e->invflags & EBT_IPROTO)
-		return false;
+		return -EINVAL;
 	if (info->bitmask & ~EBT_ARP_MASK || info->invflags & ~EBT_ARP_MASK)
-		return false;
-	return true;
+		return -EINVAL;
+	return 0;
 }
 
 static struct xt_match ebt_arp_mt_reg __read_mostly = {
diff --git a/net/bridge/netfilter/ebt_ip.c b/net/bridge/netfilter/ebt_ip.c
index d1a555dc887..a1c76c7e521 100644
--- a/net/bridge/netfilter/ebt_ip.c
+++ b/net/bridge/netfilter/ebt_ip.c
@@ -84,24 +84,24 @@ static int ebt_ip_mt_check(const struct xt_mtchk_param *par)
 
 	if (e->ethproto != htons(ETH_P_IP) ||
 	   e->invflags & EBT_IPROTO)
-		return false;
+		return -EINVAL;
 	if (info->bitmask & ~EBT_IP_MASK || info->invflags & ~EBT_IP_MASK)
-		return false;
+		return -EINVAL;
 	if (info->bitmask & (EBT_IP_DPORT | EBT_IP_SPORT)) {
 		if (info->invflags & EBT_IP_PROTO)
-			return false;
+			return -EINVAL;
 		if (info->protocol != IPPROTO_TCP &&
 		    info->protocol != IPPROTO_UDP &&
 		    info->protocol != IPPROTO_UDPLITE &&
 		    info->protocol != IPPROTO_SCTP &&
 		    info->protocol != IPPROTO_DCCP)
-			 return false;
+			 return -EINVAL;
 	}
 	if (info->bitmask & EBT_IP_DPORT && info->dport[0] > info->dport[1])
-		return false;
+		return -EINVAL;
 	if (info->bitmask & EBT_IP_SPORT && info->sport[0] > info->sport[1])
-		return false;
-	return true;
+		return -EINVAL;
+	return 0;
 }
 
 static struct xt_match ebt_ip_mt_reg __read_mostly = {
diff --git a/net/bridge/netfilter/ebt_ip6.c b/net/bridge/netfilter/ebt_ip6.c
index fa4ecf50fdc..33f8413f05a 100644
--- a/net/bridge/netfilter/ebt_ip6.c
+++ b/net/bridge/netfilter/ebt_ip6.c
@@ -86,24 +86,24 @@ static int ebt_ip6_mt_check(const struct xt_mtchk_param *par)
 	struct ebt_ip6_info *info = par->matchinfo;
 
 	if (e->ethproto != htons(ETH_P_IPV6) || e->invflags & EBT_IPROTO)
-		return false;
+		return -EINVAL;
 	if (info->bitmask & ~EBT_IP6_MASK || info->invflags & ~EBT_IP6_MASK)
-		return false;
+		return -EINVAL;
 	if (info->bitmask & (EBT_IP6_DPORT | EBT_IP6_SPORT)) {
 		if (info->invflags & EBT_IP6_PROTO)
-			return false;
+			return -EINVAL;
 		if (info->protocol != IPPROTO_TCP &&
 		    info->protocol != IPPROTO_UDP &&
 		    info->protocol != IPPROTO_UDPLITE &&
 		    info->protocol != IPPROTO_SCTP &&
 		    info->protocol != IPPROTO_DCCP)
-			return false;
+			return -EINVAL;
 	}
 	if (info->bitmask & EBT_IP6_DPORT && info->dport[0] > info->dport[1])
-		return false;
+		return -EINVAL;
 	if (info->bitmask & EBT_IP6_SPORT && info->sport[0] > info->sport[1])
-		return false;
-	return true;
+		return -EINVAL;
+	return 0;
 }
 
 static struct xt_match ebt_ip6_mt_reg __read_mostly = {
diff --git a/net/bridge/netfilter/ebt_limit.c b/net/bridge/netfilter/ebt_limit.c
index abfb0ecd7c1..4b0e2e53fa5 100644
--- a/net/bridge/netfilter/ebt_limit.c
+++ b/net/bridge/netfilter/ebt_limit.c
@@ -74,7 +74,7 @@ static int ebt_limit_mt_check(const struct xt_mtchk_param *par)
 	    user2credits(info->avg * info->burst) < user2credits(info->avg)) {
 		pr_info("overflow, try lower: %u/%u\n",
 			info->avg, info->burst);
-		return false;
+		return -EINVAL;
 	}
 
 	/* User avg in seconds * EBT_LIMIT_SCALE: convert to jiffies * 128. */
@@ -82,7 +82,7 @@ static int ebt_limit_mt_check(const struct xt_mtchk_param *par)
 	info->credit = user2credits(info->avg * info->burst);
 	info->credit_cap = user2credits(info->avg * info->burst);
 	info->cost = user2credits(info->avg);
-	return true;
+	return 0;
 }
 
 
diff --git a/net/bridge/netfilter/ebt_mark_m.c b/net/bridge/netfilter/ebt_mark_m.c
index 1e5b0b316fb..e4366c0a1a4 100644
--- a/net/bridge/netfilter/ebt_mark_m.c
+++ b/net/bridge/netfilter/ebt_mark_m.c
@@ -27,12 +27,12 @@ static int ebt_mark_mt_check(const struct xt_mtchk_param *par)
 	const struct ebt_mark_m_info *info = par->matchinfo;
 
 	if (info->bitmask & ~EBT_MARK_MASK)
-		return false;
+		return -EINVAL;
 	if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND))
-		return false;
+		return -EINVAL;
 	if (!info->bitmask)
-		return false;
-	return true;
+		return -EINVAL;
+	return 0;
 }
 
 
diff --git a/net/bridge/netfilter/ebt_pkttype.c b/net/bridge/netfilter/ebt_pkttype.c
index 9b3c6451660..f34bcc3197b 100644
--- a/net/bridge/netfilter/ebt_pkttype.c
+++ b/net/bridge/netfilter/ebt_pkttype.c
@@ -25,9 +25,9 @@ static int ebt_pkttype_mt_check(const struct xt_mtchk_param *par)
 	const struct ebt_pkttype_info *info = par->matchinfo;
 
 	if (info->invert != 0 && info->invert != 1)
-		return false;
+		return -EINVAL;
 	/* Allow any pkt_type value */
-	return true;
+	return 0;
 }
 
 static struct xt_match ebt_pkttype_mt_reg __read_mostly = {
diff --git a/net/bridge/netfilter/ebt_stp.c b/net/bridge/netfilter/ebt_stp.c
index 521186fa699..02f28fdda39 100644
--- a/net/bridge/netfilter/ebt_stp.c
+++ b/net/bridge/netfilter/ebt_stp.c
@@ -162,13 +162,13 @@ static int ebt_stp_mt_check(const struct xt_mtchk_param *par)
 
 	if (info->bitmask & ~EBT_STP_MASK || info->invflags & ~EBT_STP_MASK ||
 	    !(info->bitmask & EBT_STP_MASK))
-		return false;
+		return -EINVAL;
 	/* Make sure the match only receives stp frames */
 	if (compare_ether_addr(e->destmac, bridge_ula) ||
 	    compare_ether_addr(e->destmsk, msk) || !(e->bitmask & EBT_DESTMAC))
-		return false;
+		return -EINVAL;
 
-	return true;
+	return 0;
 }
 
 static struct xt_match ebt_stp_mt_reg __read_mostly = {
diff --git a/net/bridge/netfilter/ebt_vlan.c b/net/bridge/netfilter/ebt_vlan.c
index 04a9575389d..bf8ae5c7a0c 100644
--- a/net/bridge/netfilter/ebt_vlan.c
+++ b/net/bridge/netfilter/ebt_vlan.c
@@ -88,7 +88,7 @@ static int ebt_vlan_mt_check(const struct xt_mtchk_param *par)
 	if (e->ethproto != htons(ETH_P_8021Q)) {
 		pr_debug("passed entry proto %2.4X is not 802.1Q (8100)\n",
 			 ntohs(e->ethproto));
-		return false;
+		return -EINVAL;
 	}
 
 	/* Check for bitmask range
@@ -96,14 +96,14 @@ static int ebt_vlan_mt_check(const struct xt_mtchk_param *par)
 	if (info->bitmask & ~EBT_VLAN_MASK) {
 		pr_debug("bitmask %2X is out of mask (%2X)\n",
 			 info->bitmask, EBT_VLAN_MASK);
-		return false;
+		return -EINVAL;
 	}
 
 	/* Check for inversion flags range */
 	if (info->invflags & ~EBT_VLAN_MASK) {
 		pr_debug("inversion flags %2X is out of mask (%2X)\n",
 			 info->invflags, EBT_VLAN_MASK);
-		return false;
+		return -EINVAL;
 	}
 
 	/* Reserved VLAN ID (VID) values
@@ -117,7 +117,7 @@ static int ebt_vlan_mt_check(const struct xt_mtchk_param *par)
 			if (info->id > VLAN_GROUP_ARRAY_LEN) {
 				pr_debug("id %d is out of range (1-4096)\n",
 					 info->id);
-				return false;
+				return -EINVAL;
 			}
 			/* Note: This is valid VLAN-tagged frame point.
 			 * Any value of user_priority are acceptable,
@@ -132,7 +132,7 @@ static int ebt_vlan_mt_check(const struct xt_mtchk_param *par)
 		if ((unsigned char) info->prio > 7) {
 			pr_debug("prio %d is out of range (0-7)\n",
 				 info->prio);
-			return false;
+			return -EINVAL;
 		}
 	}
 	/* Check for encapsulated proto range - it is possible to be
@@ -142,11 +142,11 @@ static int ebt_vlan_mt_check(const struct xt_mtchk_param *par)
 		if ((unsigned short) ntohs(info->encap) < ETH_ZLEN) {
 			pr_debug("encap frame length %d is less than "
 				 "minimal\n", ntohs(info->encap));
-			return false;
+			return -EINVAL;
 		}
 	}
 
-	return true;
+	return 0;
 }
 
 static struct xt_match ebt_vlan_mt_reg __read_mostly = {