From: Changli Gao <xiaosuo@xxxxxxxxx>
ct->proto is big(60 bytes) due to structure ip_ct_tcp, and we don't need
to initialize the whole for all the other protocols. This patch moves
proto to the end of structure nf_conn, and pushes the initialization down
to the individual protocols.
Signed-off-by: Changli Gao <xiaosuo@xxxxxxxxx>
Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
---
include/net/netfilter/nf_conntrack.h | 6 +++---
net/netfilter/nf_conntrack_core.c | 3 ++-
net/netfilter/nf_conntrack_netlink.c | 1 +
net/netfilter/nf_conntrack_proto_dccp.c | 3 +++
net/netfilter/nf_conntrack_proto_sctp.c | 1 +
net/netfilter/nf_conntrack_proto_tcp.c | 14 +++-----------
6 files changed, 13 insertions(+), 15 deletions(-)
diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index caf17db..abfff1e 100644
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -116,14 +116,14 @@ struct nf_conn {
u_int32_t secmark;
#endif
- /* Storage reserved for other modules: */
- union nf_conntrack_proto proto;
-
/* Extensions */
struct nf_ct_ext *ext;
#ifdef CONFIG_NET_NS
struct net *ct_net;
#endif
+
+ /* Storage reserved for other modules, must be the last member */
+ union nf_conntrack_proto proto;
};
static inline struct nf_conn *
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 27a5ea6..0ba7d48 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -651,7 +651,8 @@ __nf_conntrack_alloc(struct net *net, u16 zone,
* and ct->tuplehash[IP_CT_DIR_REPLY].hnnode.next unchanged.
*/
memset(&ct->tuplehash[IP_CT_DIR_MAX], 0,
- sizeof(*ct) - offsetof(struct nf_conn, tuplehash[IP_CT_DIR_MAX]));
+ offsetof(struct nf_conn, proto) -
+ offsetof(struct nf_conn, tuplehash[IP_CT_DIR_MAX]));
spin_lock_init(&ct->lock);
ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple = *orig;
ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode.pprev = NULL;
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index b729ace..7f59be8 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -1375,6 +1375,7 @@ ctnetlink_create_conntrack(struct net *net, u16 zone,
}
#endif
+ memset(&ct->proto, 0, sizeof(ct->proto));
if (cda[CTA_PROTOINFO]) {
err = ctnetlink_change_protoinfo(ct, cda);
if (err < 0)
diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c
index 5292560..9ae57c5 100644
--- a/net/netfilter/nf_conntrack_proto_dccp.c
+++ b/net/netfilter/nf_conntrack_proto_dccp.c
@@ -452,6 +452,9 @@ static bool dccp_new(struct nf_conn *ct, const struct sk_buff *skb,
ct->proto.dccp.role[IP_CT_DIR_ORIGINAL] = CT_DCCP_ROLE_CLIENT;
ct->proto.dccp.role[IP_CT_DIR_REPLY] = CT_DCCP_ROLE_SERVER;
ct->proto.dccp.state = CT_DCCP_NONE;
+ ct->proto.dccp.last_pkt = DCCP_PKT_REQUEST;
+ ct->proto.dccp.last_dir = IP_CT_DIR_ORIGINAL;
+ ct->proto.dccp.handshake_seq = 0;
return true;
out_invalid:
diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
index c6049c2..6f4ee70 100644
--- a/net/netfilter/nf_conntrack_proto_sctp.c
+++ b/net/netfilter/nf_conntrack_proto_sctp.c
@@ -413,6 +413,7 @@ static bool sctp_new(struct nf_conn *ct, const struct sk_buff *skb,
test_bit(SCTP_CID_COOKIE_ACK, map))
return false;
+ memset(&ct->proto.sctp, 0, sizeof(ct->proto.sctp));
new_state = SCTP_CONNTRACK_MAX;
for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
/* Don't need lock here: this conntrack not in circulation yet */
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 3fb2b73..6f38d0e 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -1066,9 +1066,7 @@ static bool tcp_new(struct nf_conn *ct, const struct sk_buff *skb,
BUG_ON(th == NULL);
/* Don't need lock here: this conntrack not in circulation yet */
- new_state
- = tcp_conntracks[0][get_conntrack_index(th)]
- [TCP_CONNTRACK_NONE];
+ new_state = tcp_conntracks[0][get_conntrack_index(th)][TCP_CONNTRACK_NONE];
/* Invalid: delete conntrack */
if (new_state >= TCP_CONNTRACK_MAX) {
@@ -1077,6 +1075,7 @@ static bool tcp_new(struct nf_conn *ct, const struct sk_buff *skb,
}
if (new_state == TCP_CONNTRACK_SYN_SENT) {
+ memset(&ct->proto.tcp, 0, sizeof(ct->proto.tcp));
/* SYN packet */
ct->proto.tcp.seen[0].td_end =
segment_seq_plus_len(ntohl(th->seq), skb->len,
@@ -1088,11 +1087,11 @@ static bool tcp_new(struct nf_conn *ct, const struct sk_buff *skb,
ct->proto.tcp.seen[0].td_end;
tcp_options(skb, dataoff, th, &ct->proto.tcp.seen[0]);
- ct->proto.tcp.seen[1].flags = 0;
} else if (nf_ct_tcp_loose == 0) {
/* Don't try to pick up connections. */
return false;
} else {
+ memset(&ct->proto.tcp, 0, sizeof(ct->proto.tcp));
/*
* We are in the middle of a connection,
* its history is lost for us.
@@ -1107,7 +1106,6 @@ static bool tcp_new(struct nf_conn *ct, const struct sk_buff *skb,
ct->proto.tcp.seen[0].td_maxend =
ct->proto.tcp.seen[0].td_end +
ct->proto.tcp.seen[0].td_maxwin;
- ct->proto.tcp.seen[0].td_scale = 0;
/* We assume SACK and liberal window checking to handle
* window scaling */
@@ -1116,13 +1114,7 @@ static bool tcp_new(struct nf_conn *ct, const struct sk_buff *skb,
IP_CT_TCP_FLAG_BE_LIBERAL;
}
- ct->proto.tcp.seen[1].td_end = 0;
- ct->proto.tcp.seen[1].td_maxend = 0;
- ct->proto.tcp.seen[1].td_maxwin = 0;
- ct->proto.tcp.seen[1].td_scale = 0;
-
/* tcp_packet will set them */
- ct->proto.tcp.state = TCP_CONNTRACK_NONE;
ct->proto.tcp.last_index = TCP_NONE_SET;
pr_debug("tcp_new: sender end=%u maxend=%u maxwin=%u scale=%i "
--
1.7.2.3
--
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