[ 345023b0db315648ccc3c1a36aee88304a8b4d91 ]
This new function combines the netlink register attribute parser
and the store validation function.
This update requires to replace:
enum nft_registers dreg:8;
in many of the expression private areas otherwise compiler complains
with:
error: cannot take address of bit-field ‘dreg’
when passing the register field as reference.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
include/net/netfilter/nf_tables.h | 8 +++---
include/net/netfilter/nf_tables_core.h | 4 +--
include/net/netfilter/nft_fib.h | 2 +-
net/netfilter/nf_tables_api.c | 34 ++++++++++++++++++++++----
net/netfilter/nft_bitwise.c | 8 +++---
net/netfilter/nft_byteorder.c | 8 +++---
net/netfilter/nft_ct.c | 7 +++---
net/netfilter/nft_exthdr.c | 8 +++---
net/netfilter/nft_fib.c | 5 ++--
net/netfilter/nft_hash.c | 17 ++++++-------
net/netfilter/nft_immediate.c | 6 ++---
net/netfilter/nft_lookup.c | 8 +++---
net/netfilter/nft_meta.c | 7 +++---
net/netfilter/nft_numgen.c | 15 +++++-------
net/netfilter/nft_osf.c | 8 +++---
net/netfilter/nft_payload.c | 6 ++---
net/netfilter/nft_rt.c | 7 +++---
net/netfilter/nft_socket.c | 7 +++---
net/netfilter/nft_tunnel.c | 8 +++---
19 files changed, 92 insertions(+), 81 deletions(-)
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 45440b362df9..904034d0e2dd 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -195,10 +195,10 @@ unsigned int nft_parse_register(const struct nlattr *attr);
int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg);
int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len);
-int nft_validate_register_store(const struct nft_ctx *ctx,
- enum nft_registers reg,
- const struct nft_data *data,
- enum nft_data_types type, unsigned int len);
+int nft_parse_register_store(const struct nft_ctx *ctx,
+ const struct nlattr *attr, u8 *dreg,
+ const struct nft_data *data,
+ enum nft_data_types type, unsigned int len);
/**
* struct nft_userdata - user defined data associated with an object
diff --git a/include/net/netfilter/nf_tables_core.h b/include/net/netfilter/nf_tables_core.h
index c81c12a825de..6a3f76e012be 100644
--- a/include/net/netfilter/nf_tables_core.h
+++ b/include/net/netfilter/nf_tables_core.h
@@ -28,7 +28,7 @@ struct nft_cmp_fast_expr {
struct nft_immediate_expr {
struct nft_data data;
- enum nft_registers dreg:8;
+ u8 dreg;
u8 dlen;
};
@@ -48,7 +48,7 @@ struct nft_payload {
enum nft_payload_bases base:8;
u8 offset;
u8 len;
- enum nft_registers dreg:8;
+ u8 dreg;
};
struct nft_payload_set {
diff --git a/include/net/netfilter/nft_fib.h b/include/net/netfilter/nft_fib.h
index a88f92737308..1f8726739529 100644
--- a/include/net/netfilter/nft_fib.h
+++ b/include/net/netfilter/nft_fib.h
@@ -3,7 +3,7 @@
#define _NFT_FIB_H_
struct nft_fib {
- enum nft_registers dreg:8;
+ u8 dreg;
u8 result;
u32 flags;
};
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index bc0a345214eb..54d2cd0447da 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -3687,6 +3687,12 @@ static int nf_tables_delset(struct net *net, struct sock *nlsk,
return nft_delset(&ctx, set);
}
+static int nft_validate_register_store(const struct nft_ctx *ctx,
+ enum nft_registers reg,
+ const struct nft_data *data,
+ enum nft_data_types type,
+ unsigned int len);
+
static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
struct nft_set *set,
const struct nft_set_iter *iter,
@@ -7059,10 +7065,11 @@ EXPORT_SYMBOL_GPL(nft_parse_register_load);
* A value of NULL for the data means that its runtime gathered
* data.
*/
-int nft_validate_register_store(const struct nft_ctx *ctx,
- enum nft_registers reg,
- const struct nft_data *data,
- enum nft_data_types type, unsigned int len)
+static int nft_validate_register_store(const struct nft_ctx *ctx,
+ enum nft_registers reg,
+ const struct nft_data *data,
+ enum nft_data_types type,
+ unsigned int len)
{
int err;
@@ -7094,7 +7101,24 @@ int nft_validate_register_store(const struct nft_ctx *ctx,
return 0;
}
}
-EXPORT_SYMBOL_GPL(nft_validate_register_store);
+
+int nft_parse_register_store(const struct nft_ctx *ctx,
+ const struct nlattr *attr, u8 *dreg,
+ const struct nft_data *data,
+ enum nft_data_types type, unsigned int len)
+{
+ int err;
+ u32 reg;
+
+ reg = nft_parse_register(attr);
+ err = nft_validate_register_store(ctx, reg, data, type, len);
+ if (err < 0)
+ return err;
+
+ *dreg = reg;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(nft_parse_register_store);
static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
[NFTA_VERDICT_CODE] = { .type = NLA_U32 },
diff --git a/net/netfilter/nft_bitwise.c b/net/netfilter/nft_bitwise.c
index 23a8a9d11987..c1055251ebde 100644
--- a/net/netfilter/nft_bitwise.c
+++ b/net/netfilter/nft_bitwise.c
@@ -19,7 +19,7 @@
struct nft_bitwise {
u8 sreg;
- enum nft_registers dreg:8;
+ u8 dreg;
u8 len;
struct nft_data mask;
struct nft_data xor;
@@ -73,9 +73,9 @@ static int nft_bitwise_init(const struct nft_ctx *ctx,
if (err < 0)
return err;
- priv->dreg = nft_parse_register(tb[NFTA_BITWISE_DREG]);
- err = nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, priv->len);
+ err = nft_parse_register_store(ctx, tb[NFTA_BITWISE_DREG],
+ &priv->dreg, NULL, NFT_DATA_VALUE,
+ priv->len);
if (err < 0)
return err;
diff --git a/net/netfilter/nft_byteorder.c b/net/netfilter/nft_byteorder.c
index c81d618137ce..5e1fbdd7b284 100644
--- a/net/netfilter/nft_byteorder.c
+++ b/net/netfilter/nft_byteorder.c
@@ -20,7 +20,7 @@
struct nft_byteorder {
u8 sreg;
- enum nft_registers dreg:8;
+ u8 dreg;
enum nft_byteorder_ops op:8;
u8 len;
u8 size;
@@ -144,9 +144,9 @@ static int nft_byteorder_init(const struct nft_ctx *ctx,
if (err < 0)
return err;
- priv->dreg = nft_parse_register(tb[NFTA_BYTEORDER_DREG]);
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, priv->len);
+ return nft_parse_register_store(ctx, tb[NFTA_BYTEORDER_DREG],
+ &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 045e350ba03e..f29f02805bcc 100644
--- a/net/netfilter/nft_ct.c
+++ b/net/netfilter/nft_ct.c
@@ -29,7 +29,7 @@ struct nft_ct {
enum nft_ct_keys key:8;
enum ip_conntrack_dir dir:8;
union {
- enum nft_registers dreg:8;
+ u8 dreg;
u8 sreg;
};
};
@@ -486,9 +486,8 @@ static int nft_ct_get_init(const struct nft_ctx *ctx,
}
}
- priv->dreg = nft_parse_register(tb[NFTA_CT_DREG]);
- err = nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, len);
+ err = nft_parse_register_store(ctx, tb[NFTA_CT_DREG], &priv->dreg, NULL,
+ NFT_DATA_VALUE, len);
if (err < 0)
return err;
diff --git a/net/netfilter/nft_exthdr.c b/net/netfilter/nft_exthdr.c
index 340520f10b68..8d0f14cd7cc3 100644
--- a/net/netfilter/nft_exthdr.c
+++ b/net/netfilter/nft_exthdr.c
@@ -22,7 +22,7 @@ struct nft_exthdr {
u8 offset;
u8 len;
u8 op;
- enum nft_registers dreg:8;
+ u8 dreg;
u8 sreg;
u8 flags;
};
@@ -258,12 +258,12 @@ static int nft_exthdr_init(const struct nft_ctx *ctx,
priv->type = nla_get_u8(tb[NFTA_EXTHDR_TYPE]);
priv->offset = offset;
priv->len = len;
- priv->dreg = nft_parse_register(tb[NFTA_EXTHDR_DREG]);
priv->flags = flags;
priv->op = op;
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, priv->len);
+ return nft_parse_register_store(ctx, tb[NFTA_EXTHDR_DREG],
+ &priv->dreg, NULL, NFT_DATA_VALUE,
+ priv->len);
}
static int nft_exthdr_tcp_set_init(const struct nft_ctx *ctx,
diff --git a/net/netfilter/nft_fib.c b/net/netfilter/nft_fib.c
index 21df8cccea65..ce6891337304 100644
--- a/net/netfilter/nft_fib.c
+++ b/net/netfilter/nft_fib.c
@@ -88,7 +88,6 @@ int nft_fib_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
return -EINVAL;
priv->result = ntohl(nla_get_be32(tb[NFTA_FIB_RESULT]));
- priv->dreg = nft_parse_register(tb[NFTA_FIB_DREG]);
switch (priv->result) {
case NFT_FIB_RESULT_OIF:
@@ -108,8 +107,8 @@ int nft_fib_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
return -EINVAL;
}
- err = nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, len);
+ err = nft_parse_register_store(ctx, tb[NFTA_FIB_DREG], &priv->dreg,
+ NULL, NFT_DATA_VALUE, len);
if (err < 0)
return err;
diff --git a/net/netfilter/nft_hash.c b/net/netfilter/nft_hash.c
index d08a14cfe56b..513419aca9c6 100644
--- a/net/netfilter/nft_hash.c
+++ b/net/netfilter/nft_hash.c
@@ -19,7 +19,7 @@
struct nft_jhash {
u8 sreg;
- enum nft_registers dreg:8;
+ u8 dreg;
u8 len;
bool autogen_seed:1;
u32 modulus;
@@ -65,7 +65,7 @@ static void nft_jhash_map_eval(const struct nft_expr *expr,
}
struct nft_symhash {
- enum nft_registers dreg:8;
+ u8 dreg;
u32 modulus;
u32 offset;
struct nft_set *map;
@@ -136,8 +136,6 @@ static int nft_jhash_init(const struct nft_ctx *ctx,
if (tb[NFTA_HASH_OFFSET])
priv->offset = ntohl(nla_get_be32(tb[NFTA_HASH_OFFSET]));
- priv->dreg = nft_parse_register(tb[NFTA_HASH_DREG]);
-
err = nft_parse_u32_check(tb[NFTA_HASH_LEN], U8_MAX, &len);
if (err < 0)
return err;
@@ -164,8 +162,8 @@ static int nft_jhash_init(const struct nft_ctx *ctx,
get_random_bytes(&priv->seed, sizeof(priv->seed));
}
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, sizeof(u32));
+ return nft_parse_register_store(ctx, tb[NFTA_HASH_DREG], &priv->dreg,
+ NULL, NFT_DATA_VALUE, sizeof(u32));
}
static int nft_jhash_map_init(const struct nft_ctx *ctx,
@@ -195,8 +193,6 @@ static int nft_symhash_init(const struct nft_ctx *ctx,
if (tb[NFTA_HASH_OFFSET])
priv->offset = ntohl(nla_get_be32(tb[NFTA_HASH_OFFSET]));
- priv->dreg = nft_parse_register(tb[NFTA_HASH_DREG]);
-
priv->modulus = ntohl(nla_get_be32(tb[NFTA_HASH_MODULUS]));
if (priv->modulus < 1)
return -ERANGE;
@@ -204,8 +200,9 @@ static int nft_symhash_init(const struct nft_ctx *ctx,
if (priv->offset + priv->modulus - 1 < priv->offset)
return -EOVERFLOW;
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, sizeof(u32));
+ return nft_parse_register_store(ctx, tb[NFTA_HASH_DREG],
+ &priv->dreg, NULL, NFT_DATA_VALUE,
+ sizeof(u32));
}
static int nft_symhash_map_init(const struct nft_ctx *ctx,
diff --git a/net/netfilter/nft_immediate.c b/net/netfilter/nft_immediate.c
index 3f6d1d2a6281..af4e2a4bce93 100644
--- a/net/netfilter/nft_immediate.c
+++ b/net/netfilter/nft_immediate.c
@@ -50,9 +50,9 @@ static int nft_immediate_init(const struct nft_ctx *ctx,
priv->dlen = desc.len;
- priv->dreg = nft_parse_register(tb[NFTA_IMMEDIATE_DREG]);
- err = nft_validate_register_store(ctx, priv->dreg, &priv->data,
- desc.type, desc.len);
+ err = nft_parse_register_store(ctx, tb[NFTA_IMMEDIATE_DREG],
+ &priv->dreg, &priv->data, desc.type,
+ desc.len);
if (err < 0)
goto err1;
diff --git a/net/netfilter/nft_lookup.c b/net/netfilter/nft_lookup.c
index c7b59bc24686..da8c7fc7c5c4 100644
--- a/net/netfilter/nft_lookup.c
+++ b/net/netfilter/nft_lookup.c
@@ -21,7 +21,7 @@
struct nft_lookup {
struct nft_set *set;
u8 sreg;
- enum nft_registers dreg:8;
+ u8 dreg;
bool invert;
struct nft_set_binding binding;
};
@@ -100,9 +100,9 @@ static int nft_lookup_init(const struct nft_ctx *ctx,
if (!(set->flags & NFT_SET_MAP))
return -EINVAL;
- priv->dreg = nft_parse_register(tb[NFTA_LOOKUP_DREG]);
- err = nft_validate_register_store(ctx, priv->dreg, NULL,
- set->dtype, set->dlen);
+ err = nft_parse_register_store(ctx, tb[NFTA_LOOKUP_DREG],
+ &priv->dreg, NULL, set->dtype,
+ set->dlen);
if (err < 0)
return err;
} else if (set->flags & NFT_SET_MAP)
diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index 7af90ed22111..061a29bd3066 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -30,7 +30,7 @@
struct nft_meta {
enum nft_meta_keys key:8;
union {
- enum nft_registers dreg:8;
+ u8 dreg;
u8 sreg;
};
};
@@ -358,9 +358,8 @@ static int nft_meta_get_init(const struct nft_ctx *ctx,
return -EOPNOTSUPP;
}
- priv->dreg = nft_parse_register(tb[NFTA_META_DREG]);
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, len);
+ return nft_parse_register_store(ctx, tb[NFTA_META_DREG], &priv->dreg,
+ NULL, NFT_DATA_VALUE, len);
}
static int nft_meta_get_validate(const struct nft_ctx *ctx,
diff --git a/net/netfilter/nft_numgen.c b/net/netfilter/nft_numgen.c
index 3cc1b3dc3c3c..8ff82f17ecba 100644
--- a/net/netfilter/nft_numgen.c
+++ b/net/netfilter/nft_numgen.c
@@ -20,7 +20,7 @@
static DEFINE_PER_CPU(struct rnd_state, nft_numgen_prandom_state);
struct nft_ng_inc {
- enum nft_registers dreg:8;
+ u8 dreg;
u32 modulus;
atomic_t counter;
u32 offset;
@@ -70,11 +70,10 @@ static int nft_ng_inc_init(const struct nft_ctx *ctx,
if (priv->offset + priv->modulus - 1 < priv->offset)
return -EOVERFLOW;
- priv->dreg = nft_parse_register(tb[NFTA_NG_DREG]);
atomic_set(&priv->counter, priv->modulus - 1);
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, sizeof(u32));
+ return nft_parse_register_store(ctx, tb[NFTA_NG_DREG], &priv->dreg,
+ NULL, NFT_DATA_VALUE, sizeof(u32));
}
static int nft_ng_dump(struct sk_buff *skb, enum nft_registers dreg,
@@ -104,7 +103,7 @@ static int nft_ng_inc_dump(struct sk_buff *skb, const struct nft_expr *expr)
}
struct nft_ng_random {
- enum nft_registers dreg:8;
+ u8 dreg;
u32 modulus;
u32 offset;
};
@@ -144,10 +143,8 @@ static int nft_ng_random_init(const struct nft_ctx *ctx,
prandom_init_once(&nft_numgen_prandom_state);
- priv->dreg = nft_parse_register(tb[NFTA_NG_DREG]);
-
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, sizeof(u32));
+ return nft_parse_register_store(ctx, tb[NFTA_NG_DREG], &priv->dreg,
+ NULL, NFT_DATA_VALUE, sizeof(u32));
}
static int nft_ng_random_dump(struct sk_buff *skb, const struct nft_expr *expr)
diff --git a/net/netfilter/nft_osf.c b/net/netfilter/nft_osf.c
index 4fac2d9a4b88..af2ce7a8c587 100644
--- a/net/netfilter/nft_osf.c
+++ b/net/netfilter/nft_osf.c
@@ -5,7 +5,7 @@
#include <linux/netfilter/nfnetlink_osf.h>
struct nft_osf {
- enum nft_registers dreg:8;
+ u8 dreg;
};
static const struct nla_policy nft_osf_policy[NFTA_OSF_MAX + 1] = {
@@ -55,9 +55,9 @@ static int nft_osf_init(const struct nft_ctx *ctx,
if (!tb[NFTA_OSF_DREG])
return -EINVAL;
- priv->dreg = nft_parse_register(tb[NFTA_OSF_DREG]);
- err = nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, NFT_OSF_MAXGENRELEN);
+ err = nft_parse_register_store(ctx, tb[NFTA_OSF_DREG], &priv->dreg,
+ NULL, NFT_DATA_VALUE,
+ NFT_OSF_MAXGENRELEN);
if (err < 0)
return err;
diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index 6c5312fecac5..77cfd5182784 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -135,10 +135,10 @@ static int nft_payload_init(const struct nft_ctx *ctx,
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 = nft_parse_register(tb[NFTA_PAYLOAD_DREG]);
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, priv->len);
+ return nft_parse_register_store(ctx, tb[NFTA_PAYLOAD_DREG],
+ &priv->dreg, NULL, NFT_DATA_VALUE,
+ priv->len);
}
static int nft_payload_dump(struct sk_buff *skb, const struct nft_expr *expr)
diff --git a/net/netfilter/nft_rt.c b/net/netfilter/nft_rt.c
index 76dba9f6b6f6..edce109ef4b0 100644
--- a/net/netfilter/nft_rt.c
+++ b/net/netfilter/nft_rt.c
@@ -18,7 +18,7 @@
struct nft_rt {
enum nft_rt_keys key:8;
- enum nft_registers dreg:8;
+ u8 dreg;
};
static u16 get_tcpmss(const struct nft_pktinfo *pkt, const struct dst_entry *skbdst)
@@ -134,9 +134,8 @@ static int nft_rt_get_init(const struct nft_ctx *ctx,
return -EOPNOTSUPP;
}
- priv->dreg = nft_parse_register(tb[NFTA_RT_DREG]);
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, len);
+ return nft_parse_register_store(ctx, tb[NFTA_RT_DREG], &priv->dreg,
+ NULL, NFT_DATA_VALUE, len);
}
static int nft_rt_get_dump(struct sk_buff *skb,
diff --git a/net/netfilter/nft_socket.c b/net/netfilter/nft_socket.c
index 4026ec38526f..7e4f7063f481 100644
--- a/net/netfilter/nft_socket.c
+++ b/net/netfilter/nft_socket.c
@@ -10,7 +10,7 @@
struct nft_socket {
enum nft_socket_keys key:8;
union {
- enum nft_registers dreg:8;
+ u8 dreg;
};
};
@@ -119,9 +119,8 @@ static int nft_socket_init(const struct nft_ctx *ctx,
return -EOPNOTSUPP;
}
- priv->dreg = nft_parse_register(tb[NFTA_SOCKET_DREG]);
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, len);
+ return nft_parse_register_store(ctx, tb[NFTA_SOCKET_DREG], &priv->dreg,
+ NULL, NFT_DATA_VALUE, len);
}
static int nft_socket_dump(struct sk_buff *skb,
diff --git a/net/netfilter/nft_tunnel.c b/net/netfilter/nft_tunnel.c
index 3fc55c81f16a..ab69a34210a8 100644
--- a/net/netfilter/nft_tunnel.c
+++ b/net/netfilter/nft_tunnel.c
@@ -14,7 +14,7 @@
struct nft_tunnel {
enum nft_tunnel_keys key:8;
- enum nft_registers dreg:8;
+ u8 dreg;
};
static void nft_tunnel_get_eval(const struct nft_expr *expr,
@@ -72,10 +72,8 @@ static int nft_tunnel_get_init(const struct nft_ctx *ctx,
return -EOPNOTSUPP;
}
- priv->dreg = nft_parse_register(tb[NFTA_TUNNEL_DREG]);
-
- return nft_validate_register_store(ctx, priv->dreg, NULL,
- NFT_DATA_VALUE, len);
+ return nft_parse_register_store(ctx, tb[NFTA_TUNNEL_DREG], &priv->dreg,
+ NULL, NFT_DATA_VALUE, len);
}
static int nft_tunnel_get_dump(struct sk_buff *skb,
--
2.30.2
