This patch simplifies the conntrack event caching system by removing
several events:
* IPCT_[*]_VOLATILE, IPCT_HELPINFO and IPCT_NATINFO has been deleted
since the have no clients.
* IPCT_COUNTER_FILLING which is a leftover of the 32-bits counter
days.
* IPCT_REFRESH which is not of any use since we always include the
timeout in the messages.
After this patch, the existing events are:
* IPCT_NEW, IPCT_RELATED and IPCT_DESTROY, that are used to identify
addition and deletion of entries.
* IPCT_STATUS, that notes that the status bits have changes,
eg. IPS_SEEN_REPLY and IPS_ASSURED.
* IPCT_PROTOINFO, that reports that internal protocol information has
changed, eg. the TCP, DCCP and SCTP protocol state.
* IPCT_HELPER, that a helper has been assigned or unassigned to this
entry.
* IPCT_MARK and IPCT_SECMARK, that reports that the mark has changed, this
covers the case when a mark is set to zero.
* IPCT_NATSEQADJ, to report that there's updates in the NAT sequence
adjustment.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
include/net/netfilter/nf_conntrack_ecache.h | 36 ++++--------------------
net/ipv4/netfilter/nf_conntrack_proto_icmp.c | 1 -
net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c | 1 -
net/netfilter/nf_conntrack_core.c | 14 +--------
net/netfilter/nf_conntrack_ftp.c | 2 -
net/netfilter/nf_conntrack_netlink.c | 2 +
net/netfilter/nf_conntrack_proto_tcp.c | 1 -
7 files changed, 8 insertions(+), 49 deletions(-)
diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h
index 892b8cd..2e17a2d 100644
--- a/include/net/netfilter/nf_conntrack_ecache.h
+++ b/include/net/netfilter/nf_conntrack_ecache.h
@@ -26,52 +26,28 @@ enum ip_conntrack_events
IPCT_DESTROY_BIT = 2,
IPCT_DESTROY = (1 << IPCT_DESTROY_BIT),
- /* Timer has been refreshed */
- IPCT_REFRESH_BIT = 3,
- IPCT_REFRESH = (1 << IPCT_REFRESH_BIT),
-
/* Status has changed */
- IPCT_STATUS_BIT = 4,
+ IPCT_STATUS_BIT = 3,
IPCT_STATUS = (1 << IPCT_STATUS_BIT),
/* Update of protocol info */
- IPCT_PROTOINFO_BIT = 5,
+ IPCT_PROTOINFO_BIT = 4,
IPCT_PROTOINFO = (1 << IPCT_PROTOINFO_BIT),
- /* Volatile protocol info */
- IPCT_PROTOINFO_VOLATILE_BIT = 6,
- IPCT_PROTOINFO_VOLATILE = (1 << IPCT_PROTOINFO_VOLATILE_BIT),
-
/* New helper for conntrack */
- IPCT_HELPER_BIT = 7,
+ IPCT_HELPER_BIT = 5,
IPCT_HELPER = (1 << IPCT_HELPER_BIT),
- /* Update of helper info */
- IPCT_HELPINFO_BIT = 8,
- IPCT_HELPINFO = (1 << IPCT_HELPINFO_BIT),
-
- /* Volatile helper info */
- IPCT_HELPINFO_VOLATILE_BIT = 9,
- IPCT_HELPINFO_VOLATILE = (1 << IPCT_HELPINFO_VOLATILE_BIT),
-
- /* NAT info */
- IPCT_NATINFO_BIT = 10,
- IPCT_NATINFO = (1 << IPCT_NATINFO_BIT),
-
- /* Counter highest bit has been set, unused */
- IPCT_COUNTER_FILLING_BIT = 11,
- IPCT_COUNTER_FILLING = (1 << IPCT_COUNTER_FILLING_BIT),
-
/* Mark is set */
- IPCT_MARK_BIT = 12,
+ IPCT_MARK_BIT = 6,
IPCT_MARK = (1 << IPCT_MARK_BIT),
/* NAT sequence adjustment */
- IPCT_NATSEQADJ_BIT = 13,
+ IPCT_NATSEQADJ_BIT = 7,
IPCT_NATSEQADJ = (1 << IPCT_NATSEQADJ_BIT),
/* Secmark is set */
- IPCT_SECMARK_BIT = 14,
+ IPCT_SECMARK_BIT = 8,
IPCT_SECMARK = (1 << IPCT_SECMARK_BIT),
};
diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
index 23b2c2e..c6ab3d9 100644
--- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
@@ -91,7 +91,6 @@ static int icmp_packet(struct nf_conn *ct,
nf_ct_kill_acct(ct, ctinfo, skb);
} else {
atomic_inc(&ct->proto.icmp.count);
- nf_conntrack_event_cache(IPCT_PROTOINFO_VOLATILE, ct);
nf_ct_refresh_acct(ct, ctinfo, skb, nf_ct_icmp_timeout);
}
diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
index 9903227..a0acd96 100644
--- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
@@ -104,7 +104,6 @@ static int icmpv6_packet(struct nf_conn *ct,
nf_ct_kill_acct(ct, ctinfo, skb);
} else {
atomic_inc(&ct->proto.icmp.count);
- nf_conntrack_event_cache(IPCT_PROTOINFO_VOLATILE, ct);
nf_ct_refresh_acct(ct, ctinfo, skb, nf_ct_icmpv6_timeout);
}
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index f59c4ed..b54c234 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -398,11 +398,7 @@ __nf_conntrack_confirm(struct sk_buff *skb)
help = nfct_help(ct);
if (help && help->helper)
nf_conntrack_event_cache(IPCT_HELPER, ct);
-#ifdef CONFIG_NF_NAT_NEEDED
- if (test_bit(IPS_SRC_NAT_DONE_BIT, &ct->status) ||
- test_bit(IPS_DST_NAT_DONE_BIT, &ct->status))
- nf_conntrack_event_cache(IPCT_NATINFO, ct);
-#endif
+
nf_conntrack_event_cache(master_ct(ct) ?
IPCT_RELATED : IPCT_NEW, ct);
return NF_ACCEPT;
@@ -807,8 +803,6 @@ void __nf_ct_refresh_acct(struct nf_conn *ct,
unsigned long extra_jiffies,
int do_acct)
{
- int event = 0;
-
NF_CT_ASSERT(ct->timeout.data == (unsigned long)ct);
NF_CT_ASSERT(skb);
@@ -821,7 +815,6 @@ void __nf_ct_refresh_acct(struct nf_conn *ct,
/* If not in hash table, timer will not be active yet */
if (!nf_ct_is_confirmed(ct)) {
ct->timeout.expires = extra_jiffies;
- event = IPCT_REFRESH;
} else {
unsigned long newtime = jiffies + extra_jiffies;
@@ -832,7 +825,6 @@ void __nf_ct_refresh_acct(struct nf_conn *ct,
&& del_timer(&ct->timeout)) {
ct->timeout.expires = newtime;
add_timer(&ct->timeout);
- event = IPCT_REFRESH;
}
}
@@ -849,10 +841,6 @@ acct:
}
spin_unlock_bh(&nf_conntrack_lock);
-
- /* must be unlocked when calling event cache */
- if (event)
- nf_conntrack_event_cache(event, ct);
}
EXPORT_SYMBOL_GPL(__nf_ct_refresh_acct);
diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c
index 00fecc3..5509dd1 100644
--- a/net/netfilter/nf_conntrack_ftp.c
+++ b/net/netfilter/nf_conntrack_ftp.c
@@ -338,11 +338,9 @@ static void update_nl_seq(struct nf_conn *ct, u32 nl_seq,
if (info->seq_aft_nl_num[dir] < NUM_SEQ_TO_REMEMBER) {
info->seq_aft_nl[dir][info->seq_aft_nl_num[dir]++] = nl_seq;
- nf_conntrack_event_cache(IPCT_HELPINFO_VOLATILE, ct);
} else if (oldest != NUM_SEQ_TO_REMEMBER &&
after(nl_seq, info->seq_aft_nl[dir][oldest])) {
info->seq_aft_nl[dir][oldest] = nl_seq;
- nf_conntrack_event_cache(IPCT_HELPINFO_VOLATILE, ct);
}
}
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 3a20de1..b1b9e4f 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -477,7 +477,7 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
type = IPCTNL_MSG_CT_NEW;
flags = NLM_F_CREATE|NLM_F_EXCL;
group = NFNLGRP_CONNTRACK_NEW;
- } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) {
+ } else if (events) {
type = IPCTNL_MSG_CT_NEW;
group = NFNLGRP_CONNTRACK_UPDATE;
} else
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index b5ccf2b..47090ac 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -974,7 +974,6 @@ static int tcp_packet(struct nf_conn *ct,
timeout = tcp_timeouts[new_state];
write_unlock_bh(&tcp_lock);
- nf_conntrack_event_cache(IPCT_PROTOINFO_VOLATILE, ct);
if (new_state != old_state)
nf_conntrack_event_cache(IPCT_PROTOINFO, ct);
--
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