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netfilter: nf_tables: kill nft_validate_output_register()

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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@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Patrick McHardy 2015-04-11 02:27:29 +01:00 committed by Pablo Neira Ayuso
parent 58f40ab6e2
commit 27e6d2017a
11 changed files with 14 additions and 77 deletions
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1
include/net/netfilter/nf_tables.h
View File

@ -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,

13
net/bridge/netfilter/nft_meta_bridge.c
View File

@ -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;

23
net/netfilter/nf_tables_api.c
View File

@ -4139,24 +4139,6 @@ 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
*
@ -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;

4
net/netfilter/nft_bitwise.c
View File

@ -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)

11
net/netfilter/nft_byteorder.c
View File

@ -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)

4
net/netfilter/nft_ct.c
View File

@ -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)

6
net/netfilter/nft_exthdr.c
View File

@ -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);
}

6
net/netfilter/nft_immediate.c
View File

@ -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)

4
net/netfilter/nft_lookup.c
View File

@ -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)

13
net/netfilter/nft_meta.c
View File

@ -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);

6
net/netfilter/nft_payload.c
View File

@ -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);
}