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-rw-r--r--include/net/netfilter/nf_tables.h10
-rw-r--r--net/netfilter/nf_tables_api.c101
2 files changed, 52 insertions, 59 deletions
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index b08f2a941007..1ed2797fb964 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -72,21 +72,23 @@ static inline void nft_data_debug(const struct nft_data *data)
* struct nft_ctx - nf_tables rule/set context
*
* @net: net namespace
- * @skb: netlink skb
- * @nlh: netlink message header
* @afi: address family info
* @table: the table the chain is contained in
* @chain: the chain the rule is contained in
* @nla: netlink attributes
+ * @portid: netlink portID of the original message
+ * @seq: netlink sequence number
+ * @report: notify via unicast netlink message
*/
struct nft_ctx {
struct net *net;
- const struct sk_buff *skb;
- const struct nlmsghdr *nlh;
struct nft_af_info *afi;
struct nft_table *table;
struct nft_chain *chain;
const struct nlattr * const *nla;
+ u32 portid;
+ u32 seq;
+ bool report;
};
struct nft_data_desc {
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 86d055a51f0b..4147166ad17c 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -96,13 +96,14 @@ static void nft_ctx_init(struct nft_ctx *ctx,
struct nft_chain *chain,
const struct nlattr * const *nla)
{
- ctx->net = sock_net(skb->sk);
- ctx->skb = skb;
- ctx->nlh = nlh;
- ctx->afi = afi;
- ctx->table = table;
- ctx->chain = chain;
- ctx->nla = nla;
+ ctx->net = sock_net(skb->sk);
+ ctx->afi = afi;
+ ctx->table = table;
+ ctx->chain = chain;
+ ctx->nla = nla;
+ ctx->portid = NETLINK_CB(skb).portid;
+ ctx->report = nlmsg_report(nlh);
+ ctx->seq = nlh->nlmsg_seq;
}
static struct nft_trans *nft_trans_alloc(struct nft_ctx *ctx, int msg_type,
@@ -238,14 +239,10 @@ nla_put_failure:
static int nf_tables_table_notify(const struct nft_ctx *ctx, int event)
{
struct sk_buff *skb;
- u32 portid = NETLINK_CB(ctx->skb).portid;
- u32 seq = ctx->nlh->nlmsg_seq;
- struct net *net = sock_net(ctx->skb->sk);
- bool report;
int err;
- report = nlmsg_report(ctx->nlh);
- if (!report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
+ if (!ctx->report &&
+ !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
return 0;
err = -ENOBUFS;
@@ -253,18 +250,20 @@ static int nf_tables_table_notify(const struct nft_ctx *ctx, int event)
if (skb == NULL)
goto err;
- err = nf_tables_fill_table_info(skb, portid, seq, event, 0,
+ err = nf_tables_fill_table_info(skb, ctx->portid, ctx->seq, event, 0,
ctx->afi->family, ctx->table);
if (err < 0) {
kfree_skb(skb);
goto err;
}
- err = nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, report,
- GFP_KERNEL);
+ err = nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES,
+ ctx->report, GFP_KERNEL);
err:
- if (err < 0)
- nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, err);
+ if (err < 0) {
+ nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES,
+ err);
+ }
return err;
}
@@ -721,14 +720,10 @@ nla_put_failure:
static int nf_tables_chain_notify(const struct nft_ctx *ctx, int event)
{
struct sk_buff *skb;
- u32 portid = NETLINK_CB(ctx->skb).portid;
- struct net *net = sock_net(ctx->skb->sk);
- u32 seq = ctx->nlh->nlmsg_seq;
- bool report;
int err;
- report = nlmsg_report(ctx->nlh);
- if (!report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
+ if (!ctx->report &&
+ !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
return 0;
err = -ENOBUFS;
@@ -736,7 +731,7 @@ static int nf_tables_chain_notify(const struct nft_ctx *ctx, int event)
if (skb == NULL)
goto err;
- err = nf_tables_fill_chain_info(skb, portid, seq, event, 0,
+ err = nf_tables_fill_chain_info(skb, ctx->portid, ctx->seq, event, 0,
ctx->afi->family, ctx->table,
ctx->chain);
if (err < 0) {
@@ -744,11 +739,13 @@ static int nf_tables_chain_notify(const struct nft_ctx *ctx, int event)
goto err;
}
- err = nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, report,
- GFP_KERNEL);
+ err = nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES,
+ ctx->report, GFP_KERNEL);
err:
- if (err < 0)
- nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, err);
+ if (err < 0) {
+ nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES,
+ err);
+ }
return err;
}
@@ -1473,16 +1470,11 @@ static int nf_tables_rule_notify(const struct nft_ctx *ctx,
const struct nft_rule *rule,
int event)
{
- const struct sk_buff *oskb = ctx->skb;
struct sk_buff *skb;
- u32 portid = NETLINK_CB(oskb).portid;
- struct net *net = sock_net(oskb->sk);
- u32 seq = ctx->nlh->nlmsg_seq;
- bool report;
int err;
- report = nlmsg_report(ctx->nlh);
- if (!report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
+ if (!ctx->report &&
+ !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
return 0;
err = -ENOBUFS;
@@ -1490,7 +1482,7 @@ static int nf_tables_rule_notify(const struct nft_ctx *ctx,
if (skb == NULL)
goto err;
- err = nf_tables_fill_rule_info(skb, portid, seq, event, 0,
+ err = nf_tables_fill_rule_info(skb, ctx->portid, ctx->seq, event, 0,
ctx->afi->family, ctx->table,
ctx->chain, rule);
if (err < 0) {
@@ -1498,11 +1490,13 @@ static int nf_tables_rule_notify(const struct nft_ctx *ctx,
goto err;
}
- err = nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, report,
- GFP_KERNEL);
+ err = nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES,
+ ctx->report, GFP_KERNEL);
err:
- if (err < 0)
- nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, err);
+ if (err < 0) {
+ nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES,
+ err);
+ }
return err;
}
@@ -2141,8 +2135,8 @@ static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
struct nfgenmsg *nfmsg;
struct nlmsghdr *nlh;
struct nlattr *desc;
- u32 portid = NETLINK_CB(ctx->skb).portid;
- u32 seq = ctx->nlh->nlmsg_seq;
+ u32 portid = ctx->portid;
+ u32 seq = ctx->seq;
event |= NFNL_SUBSYS_NFTABLES << 8;
nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg),
@@ -2194,12 +2188,11 @@ static int nf_tables_set_notify(const struct nft_ctx *ctx,
int event)
{
struct sk_buff *skb;
- u32 portid = NETLINK_CB(ctx->skb).portid;
- bool report;
+ u32 portid = ctx->portid;
int err;
- report = nlmsg_report(ctx->nlh);
- if (!report && !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
+ if (!ctx->report &&
+ !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
return 0;
err = -ENOBUFS;
@@ -2213,8 +2206,8 @@ static int nf_tables_set_notify(const struct nft_ctx *ctx,
goto err;
}
- err = nfnetlink_send(skb, ctx->net, portid, NFNLGRP_NFTABLES, report,
- GFP_KERNEL);
+ err = nfnetlink_send(skb, ctx->net, portid, NFNLGRP_NFTABLES,
+ ctx->report, GFP_KERNEL);
err:
if (err < 0)
nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, err);
@@ -2956,14 +2949,12 @@ static int nf_tables_setelem_notify(const struct nft_ctx *ctx,
const struct nft_set_elem *elem,
int event, u16 flags)
{
- const struct sk_buff *oskb = ctx->skb;
- struct net *net = sock_net(oskb->sk);
- u32 portid = NETLINK_CB(oskb).portid;
- bool report = nlmsg_report(ctx->nlh);
+ struct net *net = ctx->net;
+ u32 portid = ctx->portid;
struct sk_buff *skb;
int err;
- if (!report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
+ if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
return 0;
err = -ENOBUFS;
@@ -2978,7 +2969,7 @@ static int nf_tables_setelem_notify(const struct nft_ctx *ctx,
goto err;
}
- err = nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, report,
+ err = nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, ctx->report,
GFP_KERNEL);
err:
if (err < 0)
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-19 16:32:06 +0100