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Diffstat (limited to 'net/netfilter/nf_tables_api.c')
-rw-r--r--net/netfilter/nf_tables_api.c101
1 files changed, 57 insertions, 44 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 5092c817c222..6dac9a3c9c40 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -840,64 +840,64 @@ static void nft_ctx_init(struct nft_ctx *ctx,
*/
/**
- * nft_register_expr - register nf_tables expr operations
- * @ops: expr operations
+ * nft_register_expr - register nf_tables expr type
+ * @ops: expr type
*
- * Registers the expr operations for use with nf_tables. Returns zero on
+ * Registers the expr type for use with nf_tables. Returns zero on
* success or a negative errno code otherwise.
*/
-int nft_register_expr(struct nft_expr_ops *ops)
+int nft_register_expr(struct nft_expr_type *type)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
- list_add_tail(&ops->list, &nf_tables_expressions);
+ list_add_tail(&type->list, &nf_tables_expressions);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
return 0;
}
EXPORT_SYMBOL_GPL(nft_register_expr);
/**
- * nft_unregister_expr - unregister nf_tables expr operations
- * @ops: expr operations
+ * nft_unregister_expr - unregister nf_tables expr type
+ * @ops: expr type
*
- * Unregisters the expr operations for use with nf_tables.
+ * Unregisters the expr typefor use with nf_tables.
*/
-void nft_unregister_expr(struct nft_expr_ops *ops)
+void nft_unregister_expr(struct nft_expr_type *type)
{
nfnl_lock(NFNL_SUBSYS_NFTABLES);
- list_del(&ops->list);
+ list_del(&type->list);
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
}
EXPORT_SYMBOL_GPL(nft_unregister_expr);
-static const struct nft_expr_ops *__nft_expr_ops_get(struct nlattr *nla)
+static const struct nft_expr_type *__nft_expr_type_get(struct nlattr *nla)
{
- const struct nft_expr_ops *ops;
+ const struct nft_expr_type *type;
- list_for_each_entry(ops, &nf_tables_expressions, list) {
- if (!nla_strcmp(nla, ops->name))
- return ops;
+ list_for_each_entry(type, &nf_tables_expressions, list) {
+ if (!nla_strcmp(nla, type->name))
+ return type;
}
return NULL;
}
-static const struct nft_expr_ops *nft_expr_ops_get(struct nlattr *nla)
+static const struct nft_expr_type *nft_expr_type_get(struct nlattr *nla)
{
- const struct nft_expr_ops *ops;
+ const struct nft_expr_type *type;
if (nla == NULL)
return ERR_PTR(-EINVAL);
- ops = __nft_expr_ops_get(nla);
- if (ops != NULL && try_module_get(ops->owner))
- return ops;
+ type = __nft_expr_type_get(nla);
+ if (type != NULL && try_module_get(type->owner))
+ return type;
#ifdef CONFIG_MODULES
- if (ops == NULL) {
+ if (type == NULL) {
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
request_module("nft-expr-%.*s",
nla_len(nla), (char *)nla_data(nla));
nfnl_lock(NFNL_SUBSYS_NFTABLES);
- if (__nft_expr_ops_get(nla))
+ if (__nft_expr_type_get(nla))
return ERR_PTR(-EAGAIN);
}
#endif
@@ -912,7 +912,7 @@ static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
static int nf_tables_fill_expr_info(struct sk_buff *skb,
const struct nft_expr *expr)
{
- if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->name))
+ if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
goto nla_put_failure;
if (expr->ops->dump) {
@@ -932,28 +932,52 @@ nla_put_failure:
struct nft_expr_info {
const struct nft_expr_ops *ops;
- struct nlattr *tb[NFTA_EXPR_MAX + 1];
+ struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
};
static int nf_tables_expr_parse(const struct nlattr *nla,
struct nft_expr_info *info)
{
+ const struct nft_expr_type *type;
const struct nft_expr_ops *ops;
+ struct nlattr *tb[NFTA_EXPR_MAX + 1];
int err;
- err = nla_parse_nested(info->tb, NFTA_EXPR_MAX, nla, nft_expr_policy);
+ err = nla_parse_nested(tb, NFTA_EXPR_MAX, nla, nft_expr_policy);
if (err < 0)
return err;
- ops = nft_expr_ops_get(info->tb[NFTA_EXPR_NAME]);
- if (IS_ERR(ops))
- return PTR_ERR(ops);
+ type = nft_expr_type_get(tb[NFTA_EXPR_NAME]);
+ if (IS_ERR(type))
+ return PTR_ERR(type);
+
+ if (tb[NFTA_EXPR_DATA]) {
+ err = nla_parse_nested(info->tb, type->maxattr,
+ tb[NFTA_EXPR_DATA], type->policy);
+ if (err < 0)
+ goto err1;
+ } else
+ memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
+
+ if (type->select_ops != NULL) {
+ ops = type->select_ops((const struct nlattr * const *)info->tb);
+ if (IS_ERR(ops)) {
+ err = PTR_ERR(ops);
+ goto err1;
+ }
+ } else
+ ops = type->ops;
+
info->ops = ops;
return 0;
+
+err1:
+ module_put(type->owner);
+ return err;
}
static int nf_tables_newexpr(const struct nft_ctx *ctx,
- struct nft_expr_info *info,
+ const struct nft_expr_info *info,
struct nft_expr *expr)
{
const struct nft_expr_ops *ops = info->ops;
@@ -961,23 +985,11 @@ static int nf_tables_newexpr(const struct nft_ctx *ctx,
expr->ops = ops;
if (ops->init) {
- struct nlattr *ma[ops->maxattr + 1];
-
- if (info->tb[NFTA_EXPR_DATA]) {
- err = nla_parse_nested(ma, ops->maxattr,
- info->tb[NFTA_EXPR_DATA],
- ops->policy);
- if (err < 0)
- goto err1;
- } else
- memset(ma, 0, sizeof(ma[0]) * (ops->maxattr + 1));
-
- err = ops->init(ctx, expr, (const struct nlattr **)ma);
+ err = ops->init(ctx, expr, (const struct nlattr **)info->tb);
if (err < 0)
goto err1;
}
- info->ops = NULL;
return 0;
err1:
@@ -989,7 +1001,7 @@ static void nf_tables_expr_destroy(struct nft_expr *expr)
{
if (expr->ops->destroy)
expr->ops->destroy(expr);
- module_put(expr->ops->owner);
+ module_put(expr->ops->type->owner);
}
/*
@@ -1313,6 +1325,7 @@ static int nf_tables_newrule(struct sock *nlsk, struct sk_buff *skb,
err = nf_tables_newexpr(&ctx, &info[i], expr);
if (err < 0)
goto err2;
+ info[i].ops = NULL;
expr = nft_expr_next(expr);
}
@@ -1341,7 +1354,7 @@ err2:
err1:
for (i = 0; i < n; i++) {
if (info[i].ops != NULL)
- module_put(info[i].ops->owner);
+ module_put(info[i].ops->type->owner);
}
return err;
}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-16 02:38:07 +0200