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Date: Mon, 13 Apr 2015 21:29:43 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 04/21] netfilter: nf_tables: kill nft_validate_output_register()
From: Patrick McHardy <kaber@...sh.net>
All users of nft_validate_register_store() first invoke
nft_validate_output_register(). There is in fact no use for using it
on its own, so simplify the code by folding the functionality into
nft_validate_register_store() and kill it.
Signed-off-by: Patrick McHardy <kaber@...sh.net>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
include/net/netfilter/nf_tables.h | 1 -
net/bridge/netfilter/nft_meta_bridge.c | 13 ++-----------
net/netfilter/nf_tables_api.c | 23 +++++------------------
net/netfilter/nft_bitwise.c | 4 ----
net/netfilter/nft_byteorder.c | 11 ++---------
net/netfilter/nft_ct.c | 4 ----
net/netfilter/nft_exthdr.c | 6 +-----
net/netfilter/nft_immediate.c | 6 +-----
net/netfilter/nft_lookup.c | 4 ----
net/netfilter/nft_meta.c | 13 ++-----------
net/netfilter/nft_payload.c | 6 +-----
11 files changed, 14 insertions(+), 77 deletions(-)
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 7251f20..a8d4bd3 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -113,7 +113,6 @@ static inline enum nft_registers nft_type_to_reg(enum nft_data_types type)
}
int nft_validate_input_register(enum nft_registers reg);
-int nft_validate_output_register(enum nft_registers reg);
int nft_validate_register_store(const struct nft_ctx *ctx,
enum nft_registers reg,
const struct nft_data *data,
diff --git a/net/bridge/netfilter/nft_meta_bridge.c b/net/bridge/netfilter/nft_meta_bridge.c
index ee9e0b7..54d9847 100644
--- a/net/bridge/netfilter/nft_meta_bridge.c
+++ b/net/bridge/netfilter/nft_meta_bridge.c
@@ -54,7 +54,6 @@ static int nft_meta_bridge_get_init(const struct nft_ctx *ctx,
{
struct nft_meta *priv = nft_expr_priv(expr);
unsigned int len;
- int err;
priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY]));
switch (priv->key) {
@@ -67,16 +66,8 @@ static int nft_meta_bridge_get_init(const struct nft_ctx *ctx,
}
priv->dreg = ntohl(nla_get_be32(tb[NFTA_META_DREG]));
- err = nft_validate_output_register(priv->dreg);
- if (err < 0)
- return err;
-
- err = nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, len);
- if (err < 0)
- return err;
-
- return 0;
+ return nft_validate_register_store(ctx, priv->dreg, NULL,
+ NFT_DATA_VALUE, len);
}
static struct nft_expr_type nft_meta_bridge_type;
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index c96070e..f01e89fe 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -4140,24 +4140,6 @@ int nft_validate_input_register(enum nft_registers reg)
EXPORT_SYMBOL_GPL(nft_validate_input_register);
/**
- * nft_validate_output_register - validate an expressions' output register
- *
- * @reg: the register number
- *
- * Validate that the output register is one of the general purpose
- * registers or the verdict register.
- */
-int nft_validate_output_register(enum nft_registers reg)
-{
- if (reg < NFT_REG_VERDICT)
- return -EINVAL;
- if (reg > NFT_REG_MAX)
- return -ERANGE;
- return 0;
-}
-EXPORT_SYMBOL_GPL(nft_validate_output_register);
-
-/**
* nft_validate_register_store - validate an expressions' register store
*
* @ctx: context of the expression performing the load
@@ -4198,10 +4180,15 @@ int nft_validate_register_store(const struct nft_ctx *ctx,
return 0;
default:
+ if (reg < NFT_REG_1)
+ return -EINVAL;
+ if (reg > NFT_REG_MAX)
+ return -ERANGE;
if (len == 0)
return -EINVAL;
if (len > FIELD_SIZEOF(struct nft_data, data))
return -ERANGE;
+
if (data != NULL && type != NFT_DATA_VALUE)
return -EINVAL;
return 0;
diff --git a/net/netfilter/nft_bitwise.c b/net/netfilter/nft_bitwise.c
index afad27c..d312052 100644
--- a/net/netfilter/nft_bitwise.c
+++ b/net/netfilter/nft_bitwise.c
@@ -71,10 +71,6 @@ static int nft_bitwise_init(const struct nft_ctx *ctx,
return err;
priv->dreg = ntohl(nla_get_be32(tb[NFTA_BITWISE_DREG]));
- err = nft_validate_output_register(priv->dreg);
- if (err < 0)
- return err;
-
err = nft_validate_register_store(ctx, priv->dreg, NULL,
NFT_DATA_VALUE, priv->len);
if (err < 0)
diff --git a/net/netfilter/nft_byteorder.c b/net/netfilter/nft_byteorder.c
index 03bfb75..848bce0 100644
--- a/net/netfilter/nft_byteorder.c
+++ b/net/netfilter/nft_byteorder.c
@@ -115,15 +115,8 @@ static int nft_byteorder_init(const struct nft_ctx *ctx,
return err;
priv->dreg = ntohl(nla_get_be32(tb[NFTA_BYTEORDER_DREG]));
- err = nft_validate_output_register(priv->dreg);
- if (err < 0)
- return err;
- err = nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, priv->len);
- if (err < 0)
- return err;
-
- return 0;
+ return nft_validate_register_store(ctx, priv->dreg, NULL,
+ NFT_DATA_VALUE, priv->len);
}
static int nft_byteorder_dump(struct sk_buff *skb, const struct nft_expr *expr)
diff --git a/net/netfilter/nft_ct.c b/net/netfilter/nft_ct.c
index e23ddb6..d85f9ad 100644
--- a/net/netfilter/nft_ct.c
+++ b/net/netfilter/nft_ct.c
@@ -307,10 +307,6 @@ static int nft_ct_get_init(const struct nft_ctx *ctx,
}
priv->dreg = ntohl(nla_get_be32(tb[NFTA_CT_DREG]));
- err = nft_validate_output_register(priv->dreg);
- if (err < 0)
- return err;
-
err = nft_validate_register_store(ctx, priv->dreg, NULL,
NFT_DATA_VALUE, len);
if (err < 0)
diff --git a/net/netfilter/nft_exthdr.c b/net/netfilter/nft_exthdr.c
index ab16a38..8c4981c 100644
--- a/net/netfilter/nft_exthdr.c
+++ b/net/netfilter/nft_exthdr.c
@@ -58,7 +58,6 @@ static int nft_exthdr_init(const struct nft_ctx *ctx,
const struct nlattr * const tb[])
{
struct nft_exthdr *priv = nft_expr_priv(expr);
- int err;
if (tb[NFTA_EXTHDR_DREG] == NULL ||
tb[NFTA_EXTHDR_TYPE] == NULL ||
@@ -69,11 +68,8 @@ static int nft_exthdr_init(const struct nft_ctx *ctx,
priv->type = nla_get_u8(tb[NFTA_EXTHDR_TYPE]);
priv->offset = ntohl(nla_get_be32(tb[NFTA_EXTHDR_OFFSET]));
priv->len = ntohl(nla_get_be32(tb[NFTA_EXTHDR_LEN]));
+ priv->dreg = ntohl(nla_get_be32(tb[NFTA_EXTHDR_DREG]));
- priv->dreg = ntohl(nla_get_be32(tb[NFTA_EXTHDR_DREG]));
- err = nft_validate_output_register(priv->dreg);
- if (err < 0)
- return err;
return nft_validate_register_store(ctx, priv->dreg, NULL,
NFT_DATA_VALUE, priv->len);
}
diff --git a/net/netfilter/nft_immediate.c b/net/netfilter/nft_immediate.c
index d058a93..a164c04 100644
--- a/net/netfilter/nft_immediate.c
+++ b/net/netfilter/nft_immediate.c
@@ -49,16 +49,12 @@ static int nft_immediate_init(const struct nft_ctx *ctx,
tb[NFTA_IMMEDIATE_DATA] == NULL)
return -EINVAL;
- priv->dreg = ntohl(nla_get_be32(tb[NFTA_IMMEDIATE_DREG]));
- err = nft_validate_output_register(priv->dreg);
- if (err < 0)
- return err;
-
err = nft_data_init(ctx, &priv->data, &desc, tb[NFTA_IMMEDIATE_DATA]);
if (err < 0)
return err;
priv->dlen = desc.len;
+ priv->dreg = ntohl(nla_get_be32(tb[NFTA_IMMEDIATE_DREG]));
err = nft_validate_register_store(ctx, priv->dreg, &priv->data,
desc.type, desc.len);
if (err < 0)
diff --git a/net/netfilter/nft_lookup.c b/net/netfilter/nft_lookup.c
index 3e4d8ef..3574543 100644
--- a/net/netfilter/nft_lookup.c
+++ b/net/netfilter/nft_lookup.c
@@ -80,10 +80,6 @@ static int nft_lookup_init(const struct nft_ctx *ctx,
return -EINVAL;
priv->dreg = ntohl(nla_get_be32(tb[NFTA_LOOKUP_DREG]));
- err = nft_validate_output_register(priv->dreg);
- if (err < 0)
- return err;
-
err = nft_validate_register_store(ctx, priv->dreg, NULL,
set->dtype, set->dlen);
if (err < 0)
diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index b733755..fbaee1d 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -218,7 +218,6 @@ int nft_meta_get_init(const struct nft_ctx *ctx,
{
struct nft_meta *priv = nft_expr_priv(expr);
unsigned int len;
- int err;
priv->key = ntohl(nla_get_be32(tb[NFTA_META_KEY]));
switch (priv->key) {
@@ -258,16 +257,8 @@ int nft_meta_get_init(const struct nft_ctx *ctx,
}
priv->dreg = ntohl(nla_get_be32(tb[NFTA_META_DREG]));
- err = nft_validate_output_register(priv->dreg);
- if (err < 0)
- return err;
-
- err = nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, len);
- if (err < 0)
- return err;
-
- return 0;
+ return nft_validate_register_store(ctx, priv->dreg, NULL,
+ NFT_DATA_VALUE, len);
}
EXPORT_SYMBOL_GPL(nft_meta_get_init);
diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index 9c7ad4b..b2a9ef9 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -62,16 +62,12 @@ static int nft_payload_init(const struct nft_ctx *ctx,
const struct nlattr * const tb[])
{
struct nft_payload *priv = nft_expr_priv(expr);
- int err;
priv->base = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_BASE]));
priv->offset = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_OFFSET]));
priv->len = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_LEN]));
+ priv->dreg = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_DREG]));
- priv->dreg = ntohl(nla_get_be32(tb[NFTA_PAYLOAD_DREG]));
- err = nft_validate_output_register(priv->dreg);
- if (err < 0)
- return err;
return nft_validate_register_store(ctx, priv->dreg, NULL,
NFT_DATA_VALUE, priv->len);
}
--
1.7.10.4
--
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