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-rw-r--r--include/net/netfilter/nf_conntrack.h2
-rw-r--r--include/net/netfilter/nf_conntrack_ecache.h57
-rw-r--r--include/net/netfilter/nf_conntrack_expect.h2
-rw-r--r--net/netfilter/nf_conntrack_core.c25
-rw-r--r--net/netfilter/nf_conntrack_ecache.c14
-rw-r--r--net/netfilter/nf_conntrack_expect.c43
-rw-r--r--net/netfilter/nf_conntrack_netlink.c88
7 files changed, 197 insertions, 34 deletions
diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index f11255e1ea35..2e0c53641cbe 100644
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -199,7 +199,7 @@ __nf_conntrack_find(struct net *net, const struct nf_conntrack_tuple *tuple);
extern void nf_conntrack_hash_insert(struct nf_conn *ct);
-extern void nf_conntrack_flush(struct net *net);
+extern void nf_conntrack_flush(struct net *net, u32 pid, int report);
extern bool nf_ct_get_tuplepr(const struct sk_buff *skb,
unsigned int nhoff, u_int16_t l3num,
diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h
index 1285ff26a014..0ff0dc69ca4a 100644
--- a/include/net/netfilter/nf_conntrack_ecache.h
+++ b/include/net/netfilter/nf_conntrack_ecache.h
@@ -17,6 +17,13 @@ struct nf_conntrack_ecache {
unsigned int events;
};
+/* This structure is passed to event handler */
+struct nf_ct_event {
+ struct nf_conn *ct;
+ u32 pid;
+ int report;
+};
+
extern struct atomic_notifier_head nf_conntrack_chain;
extern int nf_conntrack_register_notifier(struct notifier_block *nb);
extern int nf_conntrack_unregister_notifier(struct notifier_block *nb);
@@ -39,22 +46,56 @@ nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct)
local_bh_enable();
}
-static inline void nf_conntrack_event(enum ip_conntrack_events event,
- struct nf_conn *ct)
+static inline void
+nf_conntrack_event_report(enum ip_conntrack_events event,
+ struct nf_conn *ct,
+ u32 pid,
+ int report)
{
+ struct nf_ct_event item = {
+ .ct = ct,
+ .pid = pid,
+ .report = report
+ };
if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct))
- atomic_notifier_call_chain(&nf_conntrack_chain, event, ct);
+ atomic_notifier_call_chain(&nf_conntrack_chain, event, &item);
}
+static inline void
+nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct)
+{
+ nf_conntrack_event_report(event, ct, 0, 0);
+}
+
+struct nf_exp_event {
+ struct nf_conntrack_expect *exp;
+ u32 pid;
+ int report;
+};
+
extern struct atomic_notifier_head nf_ct_expect_chain;
extern int nf_ct_expect_register_notifier(struct notifier_block *nb);
extern int nf_ct_expect_unregister_notifier(struct notifier_block *nb);
static inline void
+nf_ct_expect_event_report(enum ip_conntrack_expect_events event,
+ struct nf_conntrack_expect *exp,
+ u32 pid,
+ int report)
+{
+ struct nf_exp_event item = {
+ .exp = exp,
+ .pid = pid,
+ .report = report
+ };
+ atomic_notifier_call_chain(&nf_ct_expect_chain, event, &item);
+}
+
+static inline void
nf_ct_expect_event(enum ip_conntrack_expect_events event,
struct nf_conntrack_expect *exp)
{
- atomic_notifier_call_chain(&nf_ct_expect_chain, event, exp);
+ nf_ct_expect_event_report(event, exp, 0, 0);
}
extern int nf_conntrack_ecache_init(struct net *net);
@@ -66,9 +107,17 @@ static inline void nf_conntrack_event_cache(enum ip_conntrack_events event,
struct nf_conn *ct) {}
static inline void nf_conntrack_event(enum ip_conntrack_events event,
struct nf_conn *ct) {}
+static inline void nf_conntrack_event_report(enum ip_conntrack_events event,
+ struct nf_conn *ct,
+ u32 pid,
+ int report) {}
static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct) {}
static inline void nf_ct_expect_event(enum ip_conntrack_expect_events event,
struct nf_conntrack_expect *exp) {}
+static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e,
+ struct nf_conntrack_expect *exp,
+ u32 pid,
+ int report) {}
static inline void nf_ct_event_cache_flush(struct net *net) {}
static inline int nf_conntrack_ecache_init(struct net *net)
diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h
index 37a7fc1164b0..ab17a159ac66 100644
--- a/include/net/netfilter/nf_conntrack_expect.h
+++ b/include/net/netfilter/nf_conntrack_expect.h
@@ -100,6 +100,8 @@ void nf_ct_expect_init(struct nf_conntrack_expect *, unsigned int, u_int8_t,
u_int8_t, const __be16 *, const __be16 *);
void nf_ct_expect_put(struct nf_conntrack_expect *exp);
int nf_ct_expect_related(struct nf_conntrack_expect *expect);
+int nf_ct_expect_related_report(struct nf_conntrack_expect *expect,
+ u32 pid, int report);
#endif /*_NF_CONNTRACK_EXPECT_H*/
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 1e649fb9e0df..dc3fea09f3fc 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -181,7 +181,8 @@ destroy_conntrack(struct nf_conntrack *nfct)
NF_CT_ASSERT(atomic_read(&nfct->use) == 0);
NF_CT_ASSERT(!timer_pending(&ct->timeout));
- nf_conntrack_event(IPCT_DESTROY, ct);
+ if (!test_bit(IPS_DYING_BIT, &ct->status))
+ nf_conntrack_event(IPCT_DESTROY, ct);
set_bit(IPS_DYING_BIT, &ct->status);
/* To make sure we don't get any weird locking issues here:
@@ -972,8 +973,20 @@ void nf_ct_iterate_cleanup(struct net *net,
}
EXPORT_SYMBOL_GPL(nf_ct_iterate_cleanup);
+struct __nf_ct_flush_report {
+ u32 pid;
+ int report;
+};
+
static int kill_all(struct nf_conn *i, void *data)
{
+ struct __nf_ct_flush_report *fr = (struct __nf_ct_flush_report *)data;
+
+ /* get_next_corpse sets the dying bit for us */
+ nf_conntrack_event_report(IPCT_DESTROY,
+ i,
+ fr->pid,
+ fr->report);
return 1;
}
@@ -987,9 +1000,13 @@ void nf_ct_free_hashtable(struct hlist_head *hash, int vmalloced, unsigned int s
}
EXPORT_SYMBOL_GPL(nf_ct_free_hashtable);
-void nf_conntrack_flush(struct net *net)
+void nf_conntrack_flush(struct net *net, u32 pid, int report)
{
- nf_ct_iterate_cleanup(net, kill_all, NULL);
+ struct __nf_ct_flush_report fr = {
+ .pid = pid,
+ .report = report,
+ };
+ nf_ct_iterate_cleanup(net, kill_all, &fr);
}
EXPORT_SYMBOL_GPL(nf_conntrack_flush);
@@ -1005,7 +1022,7 @@ static void nf_conntrack_cleanup_net(struct net *net)
nf_ct_event_cache_flush(net);
nf_conntrack_ecache_fini(net);
i_see_dead_people:
- nf_conntrack_flush(net);
+ nf_conntrack_flush(net, 0, 0);
if (atomic_read(&net->ct.count) != 0) {
schedule();
goto i_see_dead_people;
diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c
index a5f5e2e65d13..dee4190209cc 100644
--- a/net/netfilter/nf_conntrack_ecache.c
+++ b/net/netfilter/nf_conntrack_ecache.c
@@ -35,9 +35,17 @@ static inline void
__nf_ct_deliver_cached_events(struct nf_conntrack_ecache *ecache)
{
if (nf_ct_is_confirmed(ecache->ct) && !nf_ct_is_dying(ecache->ct)
- && ecache->events)
- atomic_notifier_call_chain(&nf_conntrack_chain, ecache->events,
- ecache->ct);
+ && ecache->events) {
+ struct nf_ct_event item = {
+ .ct = ecache->ct,
+ .pid = 0,
+ .report = 0
+ };
+
+ atomic_notifier_call_chain(&nf_conntrack_chain,
+ ecache->events,
+ &item);
+ }
ecache->events = 0;
nf_ct_put(ecache->ct);
diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index 37a703bc3b8e..3a8a34a6d37c 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -362,7 +362,7 @@ static inline int refresh_timer(struct nf_conntrack_expect *i)
return 1;
}
-int nf_ct_expect_related(struct nf_conntrack_expect *expect)
+static inline int __nf_ct_expect_check(struct nf_conntrack_expect *expect)
{
const struct nf_conntrack_expect_policy *p;
struct nf_conntrack_expect *i;
@@ -371,11 +371,8 @@ int nf_ct_expect_related(struct nf_conntrack_expect *expect)
struct net *net = nf_ct_exp_net(expect);
struct hlist_node *n;
unsigned int h;
- int ret;
-
- NF_CT_ASSERT(master_help);
+ int ret = 0;
- spin_lock_bh(&nf_conntrack_lock);
if (!master_help->helper) {
ret = -ESHUTDOWN;
goto out;
@@ -409,18 +406,50 @@ int nf_ct_expect_related(struct nf_conntrack_expect *expect)
printk(KERN_WARNING
"nf_conntrack: expectation table full\n");
ret = -EMFILE;
- goto out;
}
+out:
+ return ret;
+}
+
+int nf_ct_expect_related(struct nf_conntrack_expect *expect)
+{
+ int ret;
+
+ spin_lock_bh(&nf_conntrack_lock);
+ ret = __nf_ct_expect_check(expect);
+ if (ret < 0)
+ goto out;
nf_ct_expect_insert(expect);
+ atomic_inc(&expect->use);
+ spin_unlock_bh(&nf_conntrack_lock);
nf_ct_expect_event(IPEXP_NEW, expect);
- ret = 0;
+ nf_ct_expect_put(expect);
+ return ret;
out:
spin_unlock_bh(&nf_conntrack_lock);
return ret;
}
EXPORT_SYMBOL_GPL(nf_ct_expect_related);
+int nf_ct_expect_related_report(struct nf_conntrack_expect *expect,
+ u32 pid, int report)
+{
+ int ret;
+
+ spin_lock_bh(&nf_conntrack_lock);
+ ret = __nf_ct_expect_check(expect);
+ if (ret < 0)
+ goto out;
+ nf_ct_expect_insert(expect);
+out:
+ spin_unlock_bh(&nf_conntrack_lock);
+ if (ret == 0)
+ nf_ct_expect_event_report(IPEXP_NEW, expect, pid, report);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(nf_ct_expect_related_report);
+
#ifdef CONFIG_PROC_FS
struct ct_expect_iter_state {
struct seq_net_private p;
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 4f6486cfd337..ccc5ef1d7573 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -410,7 +410,8 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
struct nlattr *nest_parms;
- struct nf_conn *ct = (struct nf_conn *)ptr;
+ struct nf_ct_event *item = (struct nf_ct_event *)ptr;
+ struct nf_conn *ct = item->ct;
struct sk_buff *skb;
unsigned int type;
sk_buff_data_t b;
@@ -443,7 +444,7 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
b = skb->tail;
type |= NFNL_SUBSYS_CTNETLINK << 8;
- nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg));
+ nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg));
nfmsg = NLMSG_DATA(nlh);
nlh->nlmsg_flags = flags;
@@ -511,7 +512,7 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
rcu_read_unlock();
nlh->nlmsg_len = skb->tail - b;
- nfnetlink_send(skb, 0, group, 0);
+ nfnetlink_send(skb, item->pid, group, item->report);
return NOTIFY_DONE;
nla_put_failure:
@@ -722,7 +723,9 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
else {
/* Flush the whole table */
- nf_conntrack_flush(&init_net);
+ nf_conntrack_flush(&init_net,
+ NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
return 0;
}
@@ -743,6 +746,14 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
}
}
+ nf_conntrack_event_report(IPCT_DESTROY,
+ ct,
+ NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
+
+ /* death_by_timeout would report the event again */
+ set_bit(IPS_DYING_BIT, &ct->status);
+
nf_ct_kill(ct);
nf_ct_put(ct);
@@ -1088,11 +1099,35 @@ ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[])
return 0;
}
+static inline void
+ctnetlink_event_report(struct nf_conn *ct, u32 pid, int report)
+{
+ unsigned int events = 0;
+
+ if (test_bit(IPS_EXPECTED_BIT, &ct->status))
+ events |= IPCT_RELATED;
+ else
+ events |= IPCT_NEW;
+
+ nf_conntrack_event_report(IPCT_STATUS |
+ IPCT_HELPER |
+ IPCT_REFRESH |
+ IPCT_PROTOINFO |
+ IPCT_NATSEQADJ |
+ IPCT_MARK |
+ events,
+ ct,
+ pid,
+ report);
+}
+
static int
ctnetlink_create_conntrack(struct nlattr *cda[],
struct nf_conntrack_tuple *otuple,
struct nf_conntrack_tuple *rtuple,
- struct nf_conn *master_ct)
+ struct nf_conn *master_ct,
+ u32 pid,
+ int report)
{
struct nf_conn *ct;
int err = -EINVAL;
@@ -1198,9 +1233,12 @@ ctnetlink_create_conntrack(struct nlattr *cda[],
ct->master = master_ct;
}
+ nf_conntrack_get(&ct->ct_general);
add_timer(&ct->timeout);
nf_conntrack_hash_insert(ct);
rcu_read_unlock();
+ ctnetlink_event_report(ct, pid, report);
+ nf_ct_put(ct);
return 0;
@@ -1265,7 +1303,9 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
err = ctnetlink_create_conntrack(cda,
&otuple,
&rtuple,
- master_ct);
+ master_ct,
+ NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
if (err < 0 && master_ct)
nf_ct_put(master_ct);
@@ -1277,6 +1317,8 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
* so there's no need to increase the refcount */
err = -EEXIST;
if (!(nlh->nlmsg_flags & NLM_F_EXCL)) {
+ struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
+
/* we only allow nat config for new conntracks */
if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
err = -EOPNOTSUPP;
@@ -1287,8 +1329,19 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
err = -EOPNOTSUPP;
goto out_unlock;
}
- err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h),
- cda);
+
+ err = ctnetlink_change_conntrack(ct, cda);
+ if (err == 0) {
+ nf_conntrack_get(&ct->ct_general);
+ spin_unlock_bh(&nf_conntrack_lock);
+ ctnetlink_event_report(ct,
+ NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
+ nf_ct_put(ct);
+ } else
+ spin_unlock_bh(&nf_conntrack_lock);
+
+ return err;
}
out_unlock:
@@ -1423,7 +1476,8 @@ static int ctnetlink_expect_event(struct notifier_block *this,
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
- struct nf_conntrack_expect *exp = (struct nf_conntrack_expect *)ptr;
+ struct nf_exp_event *item = (struct nf_exp_event *)ptr;
+ struct nf_conntrack_expect *exp = item->exp;
struct sk_buff *skb;
unsigned int type;
sk_buff_data_t b;
@@ -1445,7 +1499,7 @@ static int ctnetlink_expect_event(struct notifier_block *this,
b = skb->tail;
type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
- nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg));
+ nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg));
nfmsg = NLMSG_DATA(nlh);
nlh->nlmsg_flags = flags;
@@ -1459,7 +1513,7 @@ static int ctnetlink_expect_event(struct notifier_block *this,
rcu_read_unlock();
nlh->nlmsg_len = skb->tail - b;
- nfnetlink_send(skb, 0, NFNLGRP_CONNTRACK_EXP_NEW, 0);
+ nfnetlink_send(skb, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, item->report);
return NOTIFY_DONE;
nla_put_failure:
@@ -1673,7 +1727,7 @@ ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[])
}
static int
-ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3)
+ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3, u32 pid, int report)
{
struct nf_conntrack_tuple tuple, mask, master_tuple;
struct nf_conntrack_tuple_hash *h = NULL;
@@ -1720,7 +1774,7 @@ ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3)
memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3));
exp->mask.src.u.all = mask.src.u.all;
- err = nf_ct_expect_related(exp);
+ err = nf_ct_expect_related_report(exp, pid, report);
nf_ct_expect_put(exp);
out:
@@ -1753,8 +1807,12 @@ ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
if (!exp) {
spin_unlock_bh(&nf_conntrack_lock);
err = -ENOENT;
- if (nlh->nlmsg_flags & NLM_F_CREATE)
- err = ctnetlink_create_expect(cda, u3);
+ if (nlh->nlmsg_flags & NLM_F_CREATE) {
+ err = ctnetlink_create_expect(cda,
+ u3,
+ NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
+ }
return err;
}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-27 09:16:07 +0200