diff options
Diffstat (limited to 'net/netfilter')
-rw-r--r-- | net/netfilter/nf_conntrack_core.c | 25 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_ecache.c | 14 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_expect.c | 43 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_netlink.c | 88 |
4 files changed, 141 insertions, 29 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 1e649fb9e0d..dc3fea09f3f 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 a5f5e2e65d1..dee4190209c 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 37a703bc3b8..3a8a34a6d37 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 4f6486cfd33..ccc5ef1d757 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; } |