From: Fernando Fernandez Mancera <ffmancera@riseup.net>
To: netfilter-devel@vger.kernel.org
Cc: Fernando Fernandez Mancera <ffmancera@riseup.net>
Subject: [PATCH 2/2 nf-next v3] netfilter: nft_quota: add quota object update support
Date: Mon, 26 Aug 2019 13:40:53 +0200 [thread overview]
Message-ID: <20190826114054.877-2-ffmancera@riseup.net> (raw)
In-Reply-To: <20190826114054.877-1-ffmancera@riseup.net>
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
---
net/netfilter/nft_quota.c | 31 ++++++++++++++++++++++++-------
1 file changed, 24 insertions(+), 7 deletions(-)
diff --git a/net/netfilter/nft_quota.c b/net/netfilter/nft_quota.c
index c8745d454bf8..3860941f6824 100644
--- a/net/netfilter/nft_quota.c
+++ b/net/netfilter/nft_quota.c
@@ -13,7 +13,7 @@
#include <net/netfilter/nf_tables.h>
struct nft_quota {
- u64 quota;
+ atomic64_t quota;
unsigned long flags;
atomic64_t consumed;
};
@@ -21,7 +21,8 @@ struct nft_quota {
static inline bool nft_overquota(struct nft_quota *priv,
const struct sk_buff *skb)
{
- return atomic64_add_return(skb->len, &priv->consumed) >= priv->quota;
+ return atomic64_add_return(skb->len, &priv->consumed) >=
+ atomic64_read(&priv->quota);
}
static inline bool nft_quota_invert(struct nft_quota *priv)
@@ -89,7 +90,7 @@ static int nft_quota_do_init(const struct nlattr * const tb[],
return -EOPNOTSUPP;
}
- priv->quota = quota;
+ atomic64_set(&priv->quota, quota);
priv->flags = flags;
atomic64_set(&priv->consumed, consumed);
@@ -105,10 +106,24 @@ static int nft_quota_obj_init(const struct nft_ctx *ctx,
return nft_quota_do_init(tb, priv);
}
+static int nft_quota_obj_update(struct nft_object *obj,
+ struct nft_object *newobj)
+{
+ struct nft_quota *newpriv = nft_obj_data(newobj);
+ struct nft_quota *priv = nft_obj_data(obj);
+ u64 newquota;
+
+ newquota = atomic64_read(&newpriv->quota);
+ atomic64_set(&priv->quota, newquota);
+ priv->flags = newpriv->flags;
+
+ return 0;
+}
+
static int nft_quota_do_dump(struct sk_buff *skb, struct nft_quota *priv,
bool reset)
{
- u64 consumed, consumed_cap;
+ u64 consumed, consumed_cap, quota;
u32 flags = priv->flags;
/* Since we inconditionally increment consumed quota for each packet
@@ -116,14 +131,15 @@ static int nft_quota_do_dump(struct sk_buff *skb, struct nft_quota *priv,
* userspace.
*/
consumed = atomic64_read(&priv->consumed);
- if (consumed >= priv->quota) {
- consumed_cap = priv->quota;
+ quota = atomic64_read(&priv->quota);
+ if (consumed >= quota) {
+ consumed_cap = quota;
flags |= NFT_QUOTA_F_DEPLETED;
} else {
consumed_cap = consumed;
}
- if (nla_put_be64(skb, NFTA_QUOTA_BYTES, cpu_to_be64(priv->quota),
+ if (nla_put_be64(skb, NFTA_QUOTA_BYTES, cpu_to_be64(quota),
NFTA_QUOTA_PAD) ||
nla_put_be64(skb, NFTA_QUOTA_CONSUMED, cpu_to_be64(consumed_cap),
NFTA_QUOTA_PAD) ||
@@ -155,6 +171,7 @@ static const struct nft_object_ops nft_quota_obj_ops = {
.init = nft_quota_obj_init,
.eval = nft_quota_obj_eval,
.dump = nft_quota_obj_dump,
+ .update = nft_quota_obj_update,
};
static struct nft_object_type nft_quota_obj_type __read_mostly = {
--
2.20.1
next prev parent reply other threads:[~2019-08-26 11:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-26 11:40 [PATCH 1/2 nf-next v3] netfilter: nf_tables: Introduce stateful object update operation Fernando Fernandez Mancera
2019-08-26 11:40 ` Fernando Fernandez Mancera [this message]
2019-09-03 17:11 ` [PATCH 2/2 nf-next v3] netfilter: nft_quota: add quota object update support Pablo Neira Ayuso
2019-09-03 17:11 ` [PATCH 1/2 nf-next v3] netfilter: nf_tables: Introduce stateful object update operation Pablo Neira Ayuso
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