* [PATCH nf] netfilter: nf_tables: bogus EBUSY when deleting flowtable after flush
@ 2019-09-24 11:24 Laura Garcia Liebana
0 siblings, 0 replies; only message in thread
From: Laura Garcia Liebana @ 2019-09-24 11:24 UTC (permalink / raw)
To: netfilter-devel; +Cc: pablo
The deletion os a flowtable after a flush in the same transaction
results in EBUSY. This patch adds an activation and deactivation of
flowtables in order to update the _use_ counter.
Signed-off-by: Laura Garcia Liebana <nevola@gmail.com>
---
include/net/netfilter/nf_tables.h | 4 ++++
net/netfilter/nf_tables_api.c | 18 ++++++++++++++++++
net/netfilter/nft_flow_offload.c | 19 +++++++++++++++++++
3 files changed, 41 insertions(+)
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 2655e03dbe1b..53c1f43a3591 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -1181,6 +1181,10 @@ struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
const struct nlattr *nla,
u8 genmask);
+void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
+ struct nft_flowtable *flowtable,
+ enum nft_trans_phase phase);
+
void nft_register_flowtable_type(struct nf_flowtable_type *type);
void nft_unregister_flowtable_type(struct nf_flowtable_type *type);
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index e4a68dc42694..5b0b95cfe6eb 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -5595,6 +5595,24 @@ struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
}
EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
+void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
+ struct nft_flowtable *flowtable,
+ enum nft_trans_phase phase)
+{
+ switch (phase) {
+ case NFT_TRANS_PREPARE:
+ flowtable->use--;
+ return;
+ case NFT_TRANS_ABORT:
+ case NFT_TRANS_RELEASE:
+ flowtable->use--;
+ return;
+ default:
+ return;
+ }
+}
+EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
+
static struct nft_flowtable *
nft_flowtable_lookup_byhandle(const struct nft_table *table,
const struct nlattr *nla, u8 genmask)
diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c
index 22cf236eb5d5..f29bbc74c4bf 100644
--- a/net/netfilter/nft_flow_offload.c
+++ b/net/netfilter/nft_flow_offload.c
@@ -177,6 +177,23 @@ static int nft_flow_offload_init(const struct nft_ctx *ctx,
return nf_ct_netns_get(ctx->net, ctx->family);
}
+static void nft_flow_offload_deactivate(const struct nft_ctx *ctx,
+ const struct nft_expr *expr,
+ enum nft_trans_phase phase)
+{
+ struct nft_flow_offload *priv = nft_expr_priv(expr);
+
+ nf_tables_deactivate_flowtable(ctx, priv->flowtable, phase);
+}
+
+static void nft_flow_offload_activate(const struct nft_ctx *ctx,
+ const struct nft_expr *expr)
+{
+ struct nft_flow_offload *priv = nft_expr_priv(expr);
+
+ priv->flowtable->use++;
+}
+
static void nft_flow_offload_destroy(const struct nft_ctx *ctx,
const struct nft_expr *expr)
{
@@ -205,6 +222,8 @@ static const struct nft_expr_ops nft_flow_offload_ops = {
.size = NFT_EXPR_SIZE(sizeof(struct nft_flow_offload)),
.eval = nft_flow_offload_eval,
.init = nft_flow_offload_init,
+ .activate = nft_flow_offload_activate,
+ .deactivate = nft_flow_offload_deactivate,
.destroy = nft_flow_offload_destroy,
.validate = nft_flow_offload_validate,
.dump = nft_flow_offload_dump,
--
2.11.0
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