From de340a7f1a9cf21931d94ea8814545c4b2d172b0 Mon Sep 17 00:00:00 2001
From: Jozsef Kadlecsik <kadlec@netfilter.org>
Date: Mon, 21 Sep 2020 10:21:39 +0200
Subject: Add bucketsize parameter to all hash types

The parameter defines the upper limit in any hash bucket at adding new entries
from userspace - if the limit would be exceeded, ipset doubles the hash size
and rehashes. It means the set may consume more memory but gives faster
evaluation at matching in the set.

Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
---
 lib/ipset_hash_ip.c | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)

(limited to 'lib/ipset_hash_ip.c')

diff --git a/lib/ipset_hash_ip.c b/lib/ipset_hash_ip.c
index 2ef1af3..470a807 100644
--- a/lib/ipset_hash_ip.c
+++ b/lib/ipset_hash_ip.c
@@ -393,6 +393,89 @@ static struct ipset_type ipset_hash_ip4 = {
 	.description = "skbinfo support",
 };
 
+/* bucketsize support */
+static struct ipset_type ipset_hash_ip5 = {
+	.name = "hash:ip",
+	.alias = { "iphash", NULL },
+	.revision = 5,
+	.family = NFPROTO_IPSET_IPV46,
+	.dimension = IPSET_DIM_ONE,
+	.elem = {
+		[IPSET_DIM_ONE - 1] = {
+			.parse = ipset_parse_ip4_single6,
+			.print = ipset_print_ip,
+			.opt = IPSET_OPT_IP
+		},
+	},
+	.cmd = {
+		[IPSET_CREATE] = {
+			.args = {
+				IPSET_ARG_FAMILY,
+				/* Aliases */
+				IPSET_ARG_INET,
+				IPSET_ARG_INET6,
+				IPSET_ARG_HASHSIZE,
+				IPSET_ARG_MAXELEM,
+				IPSET_ARG_NETMASK,
+				IPSET_ARG_TIMEOUT,
+				IPSET_ARG_COUNTERS,
+				IPSET_ARG_COMMENT,
+				IPSET_ARG_FORCEADD,
+				IPSET_ARG_SKBINFO,
+				IPSET_ARG_BUCKETSIZE,
+				/* Ignored options: backward compatibilty */
+				IPSET_ARG_PROBES,
+				IPSET_ARG_RESIZE,
+				IPSET_ARG_GC,
+				IPSET_ARG_NONE,
+			},
+			.need = 0,
+			.full = 0,
+			.help = "",
+		},
+		[IPSET_ADD] = {
+			.args = {
+				IPSET_ARG_TIMEOUT,
+				IPSET_ARG_PACKETS,
+				IPSET_ARG_BYTES,
+				IPSET_ARG_ADT_COMMENT,
+				IPSET_ARG_SKBMARK,
+				IPSET_ARG_SKBPRIO,
+				IPSET_ARG_SKBQUEUE,
+				IPSET_ARG_NONE,
+			},
+			.need = IPSET_FLAG(IPSET_OPT_IP),
+			.full = IPSET_FLAG(IPSET_OPT_IP)
+				| IPSET_FLAG(IPSET_OPT_IP_TO),
+			.help = "IP",
+		},
+		[IPSET_DEL] = {
+			.args = {
+				IPSET_ARG_NONE,
+			},
+			.need = IPSET_FLAG(IPSET_OPT_IP),
+			.full = IPSET_FLAG(IPSET_OPT_IP)
+				| IPSET_FLAG(IPSET_OPT_IP_TO),
+			.help = "IP",
+		},
+		[IPSET_TEST] = {
+			.args = {
+				IPSET_ARG_NONE,
+			},
+			.need = IPSET_FLAG(IPSET_OPT_IP),
+			.full = IPSET_FLAG(IPSET_OPT_IP)
+				| IPSET_FLAG(IPSET_OPT_IP_TO),
+			.help = "IP",
+		},
+	},
+	.usage = "where depending on the INET family\n"
+		 "      IP is a valid IPv4 or IPv6 address (or hostname),\n"
+		 "      CIDR is a valid IPv4 or IPv6 CIDR prefix.\n"
+		 "      Adding/deleting multiple elements in IP/CIDR or FROM-TO form\n"
+		 "      is supported for IPv4.",
+	.description = "bucketsize support",
+};
+
 void _init(void);
 void _init(void)
 {
@@ -401,4 +484,5 @@ void _init(void)
 	ipset_type_add(&ipset_hash_ip2);
 	ipset_type_add(&ipset_hash_ip3);
 	ipset_type_add(&ipset_hash_ip4);
+	ipset_type_add(&ipset_hash_ip5);
 }
-- 
cgit v1.2.3