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netfilter: nf_tables: add nft_set_lookup()

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This new function consolidates set lookup via either name or ID by
introducing a new nft_set_lookup() function. Replace existing spots
where we can use this too.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2017-03-06 17:46:20 +01:00
parent c56e3956c1
commit c7a72e3fdb
5 changed files with 41 additions and 41 deletions
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9
include/net/netfilter/nf_tables.h
View file

@ -385,10 +385,11 @@ static inline struct nft_set *nft_set_container_of(const void *priv)
return (void *)priv - offsetof(struct nft_set, data);
}
struct nft_set *nf_tables_set_lookup(const struct nft_table *table,
const struct nlattr *nla, u8 genmask);
struct nft_set *nf_tables_set_lookup_byid(const struct net *net,
const struct nlattr *nla, u8 genmask);
struct nft_set *nft_set_lookup(const struct net *net,
const struct nft_table *table,
const struct nlattr *nla_set_name,
const struct nlattr *nla_set_id,
u8 genmask);
static inline unsigned long nft_set_gc_interval(const struct nft_set *set)
{

31
net/netfilter/nf_tables_api.c
View file

@ -2534,8 +2534,8 @@ static int nft_ctx_init_from_setattr(struct nft_ctx *ctx, struct net *net,
return 0;
}
struct nft_set *nf_tables_set_lookup(const struct nft_table *table,
const struct nlattr *nla, u8 genmask)
static struct nft_set *nf_tables_set_lookup(const struct nft_table *table,
const struct nlattr *nla, u8 genmask)
{
struct nft_set *set;
@ -2549,11 +2549,10 @@ struct nft_set *nf_tables_set_lookup(const struct nft_table *table,
}
return ERR_PTR(-ENOENT);
}
EXPORT_SYMBOL_GPL(nf_tables_set_lookup);
struct nft_set *nf_tables_set_lookup_byid(const struct net *net,
const struct nlattr *nla,
u8 genmask)
static struct nft_set *nf_tables_set_lookup_byid(const struct net *net,
const struct nlattr *nla,
u8 genmask)
{
struct nft_trans *trans;
u32 id = ntohl(nla_get_be32(nla));
@ -2568,7 +2567,25 @@ struct nft_set *nf_tables_set_lookup_byid(const struct net *net,
}
return ERR_PTR(-ENOENT);
}
EXPORT_SYMBOL_GPL(nf_tables_set_lookup_byid);
struct nft_set *nft_set_lookup(const struct net *net,
const struct nft_table *table,
const struct nlattr *nla_set_name,
const struct nlattr *nla_set_id,
u8 genmask)
{
struct nft_set *set;
set = nf_tables_set_lookup(table, nla_set_name, genmask);
if (IS_ERR(set)) {
if (!nla_set_id)
return set;
set = nf_tables_set_lookup_byid(net, nla_set_id, genmask);
}
return set;
}
EXPORT_SYMBOL_GPL(nft_set_lookup);
static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
const char *name)

14
net/netfilter/nft_dynset.c
View file

@ -133,16 +133,10 @@ static int nft_dynset_init(const struct nft_ctx *ctx,
priv->invert = true;
}
set = nf_tables_set_lookup(ctx->table, tb[NFTA_DYNSET_SET_NAME],
genmask);
if (IS_ERR(set)) {
if (tb[NFTA_DYNSET_SET_ID])
set = nf_tables_set_lookup_byid(ctx->net,
tb[NFTA_DYNSET_SET_ID],
genmask);
if (IS_ERR(set))
return PTR_ERR(set);
}
set = nft_set_lookup(ctx->net, ctx->table, tb[NFTA_DYNSET_SET_NAME],
tb[NFTA_DYNSET_SET_ID], genmask);
if (IS_ERR(set))
return PTR_ERR(set);
if (set->ops->update == NULL)
return -EOPNOTSUPP;

14
net/netfilter/nft_lookup.c
View file

@ -71,16 +71,10 @@ static int nft_lookup_init(const struct nft_ctx *ctx,
tb[NFTA_LOOKUP_SREG] == NULL)
return -EINVAL;
set = nf_tables_set_lookup(ctx->table, tb[NFTA_LOOKUP_SET], genmask);
if (IS_ERR(set)) {
if (tb[NFTA_LOOKUP_SET_ID]) {
set = nf_tables_set_lookup_byid(ctx->net,
tb[NFTA_LOOKUP_SET_ID],
genmask);
}
if (IS_ERR(set))
return PTR_ERR(set);
}
set = nft_set_lookup(ctx->net, ctx->table, tb[NFTA_LOOKUP_SET],
tb[NFTA_LOOKUP_SET_ID], genmask);
if (IS_ERR(set))
return PTR_ERR(set);
if (set->flags & NFT_SET_EVAL)
return -EOPNOTSUPP;

14
net/netfilter/nft_objref.c
View file

@ -116,16 +116,10 @@ static int nft_objref_map_init(const struct nft_ctx *ctx,
struct nft_set *set;
int err;
set = nf_tables_set_lookup(ctx->table, tb[NFTA_OBJREF_SET_NAME], genmask);
if (IS_ERR(set)) {
if (tb[NFTA_OBJREF_SET_ID]) {
set = nf_tables_set_lookup_byid(ctx->net,
tb[NFTA_OBJREF_SET_ID],
genmask);
}
if (IS_ERR(set))
return PTR_ERR(set);
}
set = nft_set_lookup(ctx->net, ctx->table, tb[NFTA_OBJREF_SET_NAME],
tb[NFTA_OBJREF_SET_ID], genmask);
if (IS_ERR(set))
return PTR_ERR(set);
if (!(set->flags & NFT_SET_OBJECT))
return -EINVAL;