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Date: Wed, 18 Mar 2020 01:39:31 +0100
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 04/29] netfilter: nf_tables: make sets built-in
From: Florian Westphal <fw@...len.de>
Placing nftables set support in an extra module is pointless:
1. nf_tables needs dynamic registeration interface for sake of one module
2. nft heavily relies on sets, e.g. even simple rule like
"nft ... tcp dport { 80, 443 }" will not work with _SETS=n.
IOW, either nftables isn't used or both nf_tables and nf_tables_set
modules are needed anyway.
With extra module:
307K net/netfilter/nf_tables.ko
79K net/netfilter/nf_tables_set.ko
text data bss dec filename
146416 3072 545 150033 nf_tables.ko
35496 1817 0 37313 nf_tables_set.ko
This patch:
373K net/netfilter/nf_tables.ko
178563 4049 545 183157 nf_tables.ko
Signed-off-by: Florian Westphal <fw@...len.de>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
include/net/netfilter/nf_tables.h | 6 ------
net/netfilter/Kconfig | 8 --------
net/netfilter/Makefile | 9 +++------
net/netfilter/nf_tables_api.c | 41 +++++++++++---------------------------
net/netfilter/nf_tables_set_core.c | 31 ----------------------------
5 files changed, 15 insertions(+), 80 deletions(-)
delete mode 100644 net/netfilter/nf_tables_set_core.c
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 4170c033d461..9a5f41028736 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -397,9 +397,6 @@ struct nft_set_type {
};
#define to_set_type(o) container_of(o, struct nft_set_type, ops)
-int nft_register_set(struct nft_set_type *type);
-void nft_unregister_set(struct nft_set_type *type);
-
/**
* struct nft_set - nf_tables set instance
*
@@ -1253,9 +1250,6 @@ void nft_trace_notify(struct nft_traceinfo *info);
#define MODULE_ALIAS_NFT_EXPR(name) \
MODULE_ALIAS("nft-expr-" name)
-#define MODULE_ALIAS_NFT_SET() \
- MODULE_ALIAS("nft-set")
-
#define MODULE_ALIAS_NFT_OBJ(type) \
MODULE_ALIAS("nft-obj-" __stringify(type))
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index 91efae88e8c2..468fea1aebba 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -455,14 +455,6 @@ config NF_TABLES
To compile it as a module, choose M here.
if NF_TABLES
-
-config NF_TABLES_SET
- tristate "Netfilter nf_tables set infrastructure"
- help
- This option enables the nf_tables set infrastructure that allows to
- look up for elements in a set and to build one-way mappings between
- matchings and actions.
-
config NF_TABLES_INET
depends on IPV6
select NF_TABLES_IPV4
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 3f572e5a975e..4fff7d0e2d27 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -78,14 +78,11 @@ nf_tables-objs := nf_tables_core.o nf_tables_api.o nft_chain_filter.o \
nf_tables_trace.o nft_immediate.o nft_cmp.o nft_range.o \
nft_bitwise.o nft_byteorder.o nft_payload.o nft_lookup.o \
nft_dynset.o nft_meta.o nft_rt.o nft_exthdr.o \
- nft_chain_route.o nf_tables_offload.o
-
-nf_tables_set-objs := nf_tables_set_core.o \
- nft_set_hash.o nft_set_bitmap.o nft_set_rbtree.o \
- nft_set_pipapo.o
+ nft_chain_route.o nf_tables_offload.o \
+ nft_set_hash.o nft_set_bitmap.o nft_set_rbtree.o \
+ nft_set_pipapo.o
obj-$(CONFIG_NF_TABLES) += nf_tables.o
-obj-$(CONFIG_NF_TABLES_SET) += nf_tables_set.o
obj-$(CONFIG_NFT_COMPAT) += nft_compat.o
obj-$(CONFIG_NFT_CONNLIMIT) += nft_connlimit.o
obj-$(CONFIG_NFT_NUMGEN) += nft_numgen.o
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 38c680f28f15..f26a9b638d6c 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -3266,25 +3266,14 @@ static int nf_tables_delrule(struct net *net, struct sock *nlsk,
/*
* Sets
*/
-
-static LIST_HEAD(nf_tables_set_types);
-
-int nft_register_set(struct nft_set_type *type)
-{
- nfnl_lock(NFNL_SUBSYS_NFTABLES);
- list_add_tail_rcu(&type->list, &nf_tables_set_types);
- nfnl_unlock(NFNL_SUBSYS_NFTABLES);
- return 0;
-}
-EXPORT_SYMBOL_GPL(nft_register_set);
-
-void nft_unregister_set(struct nft_set_type *type)
-{
- nfnl_lock(NFNL_SUBSYS_NFTABLES);
- list_del_rcu(&type->list);
- nfnl_unlock(NFNL_SUBSYS_NFTABLES);
-}
-EXPORT_SYMBOL_GPL(nft_unregister_set);
+static const struct nft_set_type *nft_set_types[] = {
+ &nft_set_hash_fast_type,
+ &nft_set_hash_type,
+ &nft_set_rhash_type,
+ &nft_set_bitmap_type,
+ &nft_set_rbtree_type,
+ &nft_set_pipapo_type,
+};
#define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
@@ -3310,15 +3299,11 @@ nft_select_set_ops(const struct nft_ctx *ctx,
struct nft_set_estimate est, best;
const struct nft_set_type *type;
u32 flags = 0;
+ int i;
lockdep_assert_held(&ctx->net->nft.commit_mutex);
lockdep_nfnl_nft_mutex_not_held();
-#ifdef CONFIG_MODULES
- if (list_empty(&nf_tables_set_types)) {
- if (nft_request_module(ctx->net, "nft-set") == -EAGAIN)
- return ERR_PTR(-EAGAIN);
- }
-#endif
+
if (nla[NFTA_SET_FLAGS] != NULL)
flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
@@ -3327,7 +3312,8 @@ nft_select_set_ops(const struct nft_ctx *ctx,
best.lookup = ~0;
best.space = ~0;
- list_for_each_entry(type, &nf_tables_set_types, list) {
+ for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
+ type = nft_set_types[i];
ops = &type->ops;
if (!nft_set_ops_candidate(type, flags))
@@ -4312,7 +4298,6 @@ const struct nft_set_ext_type nft_set_ext_types[] = {
.align = __alignof__(u32),
},
};
-EXPORT_SYMBOL_GPL(nft_set_ext_types);
/*
* Set elements
@@ -5365,7 +5350,6 @@ void nft_set_gc_batch_release(struct rcu_head *rcu)
nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true);
kfree(gcb);
}
-EXPORT_SYMBOL_GPL(nft_set_gc_batch_release);
struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
gfp_t gfp)
@@ -5378,7 +5362,6 @@ struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
gcb->head.set = set;
return gcb;
}
-EXPORT_SYMBOL_GPL(nft_set_gc_batch_alloc);
/*
* Stateful objects
diff --git a/net/netfilter/nf_tables_set_core.c b/net/netfilter/nf_tables_set_core.c
deleted file mode 100644
index 586b621007eb..000000000000
--- a/net/netfilter/nf_tables_set_core.c
+++ /dev/null
@@ -1,31 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <linux/module.h>
-#include <net/netfilter/nf_tables_core.h>
-
-static int __init nf_tables_set_module_init(void)
-{
- nft_register_set(&nft_set_hash_fast_type);
- nft_register_set(&nft_set_hash_type);
- nft_register_set(&nft_set_rhash_type);
- nft_register_set(&nft_set_bitmap_type);
- nft_register_set(&nft_set_rbtree_type);
- nft_register_set(&nft_set_pipapo_type);
-
- return 0;
-}
-
-static void __exit nf_tables_set_module_exit(void)
-{
- nft_unregister_set(&nft_set_pipapo_type);
- nft_unregister_set(&nft_set_rbtree_type);
- nft_unregister_set(&nft_set_bitmap_type);
- nft_unregister_set(&nft_set_rhash_type);
- nft_unregister_set(&nft_set_hash_type);
- nft_unregister_set(&nft_set_hash_fast_type);
-}
-
-module_init(nf_tables_set_module_init);
-module_exit(nf_tables_set_module_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NFT_SET();
--
2.11.0
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