Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

netfilter: nf_tables: simplify the basic expressions' init routine

Browse source 
Some basic expressions are built into nf_tables.ko, such as nft_cmp,
nft_lookup, nft_range and so on. But these basic expressions' init
routine is a little ugly, too many goto errX labels, and we forget
to call nft_range_module_exit in the exit routine, although it is
harmless.

Acctually, the init and exit routines of these basic expressions
are same, i.e. do nft_register_expr in the init routine and do
nft_unregister_expr in the exit routine.

So it's better to arrange them into an array and deal with them
together.

Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Liping Zhang 2016-11-06 21:15:51 +08:00 committed by Pablo Neira Ayuso
parent f86dab3aa6
commit 4e24877e61
10 changed files with 43 additions and 174 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

33
include/net/netfilter/nf_tables_core.h
View file

@ -1,12 +1,18 @@
#ifndef _NET_NF_TABLES_CORE_H
#define _NET_NF_TABLES_CORE_H
extern struct nft_expr_type nft_imm_type;
extern struct nft_expr_type nft_cmp_type;
extern struct nft_expr_type nft_lookup_type;
extern struct nft_expr_type nft_bitwise_type;
extern struct nft_expr_type nft_byteorder_type;
extern struct nft_expr_type nft_payload_type;
extern struct nft_expr_type nft_dynset_type;
extern struct nft_expr_type nft_range_type;
int nf_tables_core_module_init(void);
void nf_tables_core_module_exit(void);
int nft_immediate_module_init(void);
void nft_immediate_module_exit(void);
struct nft_cmp_fast_expr {
u32 data;
enum nft_registers sreg:8;
@ -25,24 +31,6 @@ static inline u32 nft_cmp_fast_mask(unsigned int len)
extern const struct nft_expr_ops nft_cmp_fast_ops;
int nft_cmp_module_init(void);
void nft_cmp_module_exit(void);
int nft_range_module_init(void);
void nft_range_module_exit(void);
int nft_lookup_module_init(void);
void nft_lookup_module_exit(void);
int nft_dynset_module_init(void);
void nft_dynset_module_exit(void);
int nft_bitwise_module_init(void);
void nft_bitwise_module_exit(void);
int nft_byteorder_module_init(void);
void nft_byteorder_module_exit(void);
struct nft_payload {
enum nft_payload_bases base:8;
u8 offset;
@ -62,7 +50,4 @@ struct nft_payload_set {
extern const struct nft_expr_ops nft_payload_fast_ops;
extern struct static_key_false nft_trace_enabled;
int nft_payload_module_init(void);
void nft_payload_module_exit(void);
#endif /* _NET_NF_TABLES_CORE_H */

80
net/netfilter/nf_tables_core.c
View file

@ -232,68 +232,40 @@ nft_do_chain(struct nft_pktinfo *pkt, void *priv)
}
EXPORT_SYMBOL_GPL(nft_do_chain);
static struct nft_expr_type *nft_basic_types[] = {
&nft_imm_type,
&nft_cmp_type,
&nft_lookup_type,
&nft_bitwise_type,
&nft_byteorder_type,
&nft_payload_type,
&nft_dynset_type,
&nft_range_type,
};
int __init nf_tables_core_module_init(void)
{
int err;
int err, i;
err = nft_immediate_module_init();
if (err < 0)
goto err1;
err = nft_cmp_module_init();
if (err < 0)
goto err2;
err = nft_lookup_module_init();
if (err < 0)
goto err3;
err = nft_bitwise_module_init();
if (err < 0)
goto err4;
err = nft_byteorder_module_init();
if (err < 0)
goto err5;
err = nft_payload_module_init();
if (err < 0)
goto err6;
err = nft_dynset_module_init();
if (err < 0)
goto err7;
err = nft_range_module_init();
if (err < 0)
goto err8;
for (i = 0; i < ARRAY_SIZE(nft_basic_types); i++) {
err = nft_register_expr(nft_basic_types[i]);
if (err)
goto err;
}
return 0;
err8:
nft_dynset_module_exit();
err7:
nft_payload_module_exit();
err6:
nft_byteorder_module_exit();
err5:
nft_bitwise_module_exit();
err4:
nft_lookup_module_exit();
err3:
nft_cmp_module_exit();
err2:
nft_immediate_module_exit();
err1:
err:
while (i-- > 0)
nft_unregister_expr(nft_basic_types[i]);
return err;
}
void nf_tables_core_module_exit(void)
{
nft_dynset_module_exit();
nft_payload_module_exit();
nft_byteorder_module_exit();
nft_bitwise_module_exit();
nft_lookup_module_exit();
nft_cmp_module_exit();
nft_immediate_module_exit();
int i;
i = ARRAY_SIZE(nft_basic_types);
while (i-- > 0)
nft_unregister_expr(nft_basic_types[i]);
}

13
net/netfilter/nft_bitwise.c
View file

@ -121,7 +121,6 @@ static int nft_bitwise_dump(struct sk_buff *skb, const struct nft_expr *expr)
return -1;
}
static struct nft_expr_type nft_bitwise_type;
static const struct nft_expr_ops nft_bitwise_ops = {
.type = &nft_bitwise_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_bitwise)),
@ -130,20 +129,10 @@ static const struct nft_expr_ops nft_bitwise_ops = {
.dump = nft_bitwise_dump,
};
static struct nft_expr_type nft_bitwise_type __read_mostly = {
struct nft_expr_type nft_bitwise_type __read_mostly = {
.name = "bitwise",
.ops = &nft_bitwise_ops,
.policy = nft_bitwise_policy,
.maxattr = NFTA_BITWISE_MAX,
.owner = THIS_MODULE,
};
int __init nft_bitwise_module_init(void)
{
return nft_register_expr(&nft_bitwise_type);
}
void nft_bitwise_module_exit(void)
{
nft_unregister_expr(&nft_bitwise_type);
}

13
net/netfilter/nft_byteorder.c
View file

@ -169,7 +169,6 @@ static int nft_byteorder_dump(struct sk_buff *skb, const struct nft_expr *expr)
return -1;
}
static struct nft_expr_type nft_byteorder_type;
static const struct nft_expr_ops nft_byteorder_ops = {
.type = &nft_byteorder_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_byteorder)),
@ -178,20 +177,10 @@ static const struct nft_expr_ops nft_byteorder_ops = {
.dump = nft_byteorder_dump,
};
static struct nft_expr_type nft_byteorder_type __read_mostly = {
struct nft_expr_type nft_byteorder_type __read_mostly = {
.name = "byteorder",
.ops = &nft_byteorder_ops,
.policy = nft_byteorder_policy,
.maxattr = NFTA_BYTEORDER_MAX,
.owner = THIS_MODULE,
};
int __init nft_byteorder_module_init(void)
{
return nft_register_expr(&nft_byteorder_type);
}
void nft_byteorder_module_exit(void)
{
nft_unregister_expr(&nft_byteorder_type);
}

13
net/netfilter/nft_cmp.c
View file

@ -107,7 +107,6 @@ static int nft_cmp_dump(struct sk_buff *skb, const struct nft_expr *expr)
return -1;
}
static struct nft_expr_type nft_cmp_type;
static const struct nft_expr_ops nft_cmp_ops = {
.type = &nft_cmp_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_cmp_expr)),
@ -208,20 +207,10 @@ nft_cmp_select_ops(const struct nft_ctx *ctx, const struct nlattr * const tb[])
return &nft_cmp_ops;
}
static struct nft_expr_type nft_cmp_type __read_mostly = {
struct nft_expr_type nft_cmp_type __read_mostly = {
.name = "cmp",
.select_ops = nft_cmp_select_ops,
.policy = nft_cmp_policy,
.maxattr = NFTA_CMP_MAX,
.owner = THIS_MODULE,
};
int __init nft_cmp_module_init(void)
{
return nft_register_expr(&nft_cmp_type);
}
void nft_cmp_module_exit(void)
{
nft_unregister_expr(&nft_cmp_type);
}

13
net/netfilter/nft_dynset.c
View file

@ -261,7 +261,6 @@ static int nft_dynset_dump(struct sk_buff *skb, const struct nft_expr *expr)
return -1;
}
static struct nft_expr_type nft_dynset_type;
static const struct nft_expr_ops nft_dynset_ops = {
.type = &nft_dynset_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_dynset)),
@ -271,20 +270,10 @@ static const struct nft_expr_ops nft_dynset_ops = {
.dump = nft_dynset_dump,
};
static struct nft_expr_type nft_dynset_type __read_mostly = {
struct nft_expr_type nft_dynset_type __read_mostly = {
.name = "dynset",
.ops = &nft_dynset_ops,
.policy = nft_dynset_policy,
.maxattr = NFTA_DYNSET_MAX,
.owner = THIS_MODULE,
};
int __init nft_dynset_module_init(void)
{
return nft_register_expr(&nft_dynset_type);
}
void nft_dynset_module_exit(void)
{
nft_unregister_expr(&nft_dynset_type);
}

13
net/netfilter/nft_immediate.c
View file

@ -102,7 +102,6 @@ static int nft_immediate_validate(const struct nft_ctx *ctx,
return 0;
}
static struct nft_expr_type nft_imm_type;
static const struct nft_expr_ops nft_imm_ops = {
.type = &nft_imm_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_immediate_expr)),
@ -113,20 +112,10 @@ static const struct nft_expr_ops nft_imm_ops = {
.validate = nft_immediate_validate,
};
static struct nft_expr_type nft_imm_type __read_mostly = {
struct nft_expr_type nft_imm_type __read_mostly = {
.name = "immediate",
.ops = &nft_imm_ops,
.policy = nft_immediate_policy,
.maxattr = NFTA_IMMEDIATE_MAX,
.owner = THIS_MODULE,
};
int __init nft_immediate_module_init(void)
{
return nft_register_expr(&nft_imm_type);
}
void nft_immediate_module_exit(void)
{
nft_unregister_expr(&nft_imm_type);
}

13
net/netfilter/nft_lookup.c
View file

@ -154,7 +154,6 @@ static int nft_lookup_dump(struct sk_buff *skb, const struct nft_expr *expr)
return -1;
}
static struct nft_expr_type nft_lookup_type;
static const struct nft_expr_ops nft_lookup_ops = {
.type = &nft_lookup_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_lookup)),
@ -164,20 +163,10 @@ static const struct nft_expr_ops nft_lookup_ops = {
.dump = nft_lookup_dump,
};
static struct nft_expr_type nft_lookup_type __read_mostly = {
struct nft_expr_type nft_lookup_type __read_mostly = {
.name = "lookup",
.ops = &nft_lookup_ops,
.policy = nft_lookup_policy,
.maxattr = NFTA_LOOKUP_MAX,
.owner = THIS_MODULE,
};
int __init nft_lookup_module_init(void)
{
return nft_register_expr(&nft_lookup_type);
}
void nft_lookup_module_exit(void)
{
nft_unregister_expr(&nft_lookup_type);
}

13
net/netfilter/nft_payload.c
View file

@ -148,7 +148,6 @@ static int nft_payload_dump(struct sk_buff *skb, const struct nft_expr *expr)
return -1;
}
static struct nft_expr_type nft_payload_type;
static const struct nft_expr_ops nft_payload_ops = {
.type = &nft_payload_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_payload)),
@ -320,20 +319,10 @@ nft_payload_select_ops(const struct nft_ctx *ctx,
return &nft_payload_ops;
}
static struct nft_expr_type nft_payload_type __read_mostly = {
struct nft_expr_type nft_payload_type __read_mostly = {
.name = "payload",
.select_ops = nft_payload_select_ops,
.policy = nft_payload_policy,
.maxattr = NFTA_PAYLOAD_MAX,
.owner = THIS_MODULE,
};
int __init nft_payload_module_init(void)
{
return nft_register_expr(&nft_payload_type);
}
void nft_payload_module_exit(void)
{
nft_unregister_expr(&nft_payload_type);
}

13
net/netfilter/nft_range.c
View file

@ -122,7 +122,6 @@ static int nft_range_dump(struct sk_buff *skb, const struct nft_expr *expr)
return -1;
}
static struct nft_expr_type nft_range_type;
static const struct nft_expr_ops nft_range_ops = {
.type = &nft_range_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_range_expr)),
@ -131,20 +130,10 @@ static const struct nft_expr_ops nft_range_ops = {
.dump = nft_range_dump,
};
static struct nft_expr_type nft_range_type __read_mostly = {
struct nft_expr_type nft_range_type __read_mostly = {
.name = "range",
.ops = &nft_range_ops,
.policy = nft_range_policy,
.maxattr = NFTA_RANGE_MAX,
.owner = THIS_MODULE,
};
int __init nft_range_module_init(void)
{
return nft_register_expr(&nft_range_type);
}
void nft_range_module_exit(void)
{
nft_unregister_expr(&nft_range_type);
}