netfilter: ctnetlink: netns support

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index d4c5d06677f9b5cd57c18fb8ca1b7e1b3718b730..79478dfba27ecf0309ada7805d4d64b077c56542 100644 (file)
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -30,6 +30,7 @@
 
 #include <linux/netfilter.h>
 #include <net/netlink.h>
+#include <net/sock.h>
 #include <net/netfilter/nf_conntrack.h>
 #include <net/netfilter/nf_conntrack_core.h>
 #include <net/netfilter/nf_conntrack_expect.h>
@@ -456,6 +457,7 @@ ctnetlink_nlmsg_size(const struct nf_conn *ct)
 static int
 ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
 {
+       struct net *net;
        struct nlmsghdr *nlh;
        struct nfgenmsg *nfmsg;
        struct nlattr *nest_parms;
@@ -482,7 +484,8 @@ ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
        } else
                return 0;
 
-       if (!item->report && !nfnetlink_has_listeners(&init_net, group))
+       net = nf_ct_net(ct);
+       if (!item->report && !nfnetlink_has_listeners(net, group))
                return 0;
 
        skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC);
@@ -559,7 +562,7 @@ ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
        rcu_read_unlock();
 
        nlmsg_end(skb, nlh);
-       err = nfnetlink_send(skb, &init_net, item->pid, group, item->report,
+       err = nfnetlink_send(skb, net, item->pid, group, item->report,
                             GFP_ATOMIC);
        if (err == -ENOBUFS || err == -EAGAIN)
                return -ENOBUFS;
@@ -572,7 +575,7 @@ nla_put_failure:
 nlmsg_failure:
        kfree_skb(skb);
 errout:
-       nfnetlink_set_err(&init_net, 0, group, -ENOBUFS);
+       nfnetlink_set_err(net, 0, group, -ENOBUFS);
        return 0;
 }
 #endif /* CONFIG_NF_CONNTRACK_EVENTS */
@@ -587,6 +590,7 @@ static int ctnetlink_done(struct netlink_callback *cb)
 static int
 ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
 {
+       struct net *net = sock_net(skb->sk);
        struct nf_conn *ct, *last;
        struct nf_conntrack_tuple_hash *h;
        struct hlist_nulls_node *n;
@@ -597,7 +601,7 @@ ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
        last = (struct nf_conn *)cb->args[1];
        for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
 restart:
-               hlist_nulls_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]],
+               hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[cb->args[0]],
                                         hnnode) {
                        if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
                                continue;
@@ -769,6 +773,7 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
                        const struct nlmsghdr *nlh,
                        const struct nlattr * const cda[])
 {
+       struct net *net = sock_net(ctnl);
        struct nf_conntrack_tuple_hash *h;
        struct nf_conntrack_tuple tuple;
        struct nf_conn *ct;
@@ -782,7 +787,7 @@ 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_report(&init_net,
+               nf_conntrack_flush_report(net,
                                         NETLINK_CB(skb).pid,
                                         nlmsg_report(nlh));
                return 0;
@@ -791,7 +796,7 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
        if (err < 0)
                return err;
 
-       h = nf_conntrack_find_get(&init_net, &tuple);
+       h = nf_conntrack_find_get(net, &tuple);
        if (!h)
                return -ENOENT;
 
@@ -829,6 +834,7 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
                        const struct nlmsghdr *nlh,
                        const struct nlattr * const cda[])
 {
+       struct net *net = sock_net(ctnl);
        struct nf_conntrack_tuple_hash *h;
        struct nf_conntrack_tuple tuple;
        struct nf_conn *ct;
@@ -851,7 +857,7 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
        if (err < 0)
                return err;
 
-       h = nf_conntrack_find_get(&init_net, &tuple);
+       h = nf_conntrack_find_get(net, &tuple);
        if (!h)
                return -ENOENT;
 
@@ -1176,7 +1182,8 @@ ctnetlink_change_conntrack(struct nf_conn *ct,
 }
 
 static struct nf_conn *
-ctnetlink_create_conntrack(const struct nlattr * const cda[],
+ctnetlink_create_conntrack(struct net *net,
+                          const struct nlattr * const cda[],
                           struct nf_conntrack_tuple *otuple,
                           struct nf_conntrack_tuple *rtuple,
                           u8 u3)
@@ -1185,7 +1192,7 @@ ctnetlink_create_conntrack(const struct nlattr * const cda[],
        int err = -EINVAL;
        struct nf_conntrack_helper *helper;
 
-       ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_ATOMIC);
+       ct = nf_conntrack_alloc(net, otuple, rtuple, GFP_ATOMIC);
        if (IS_ERR(ct))
                return ERR_PTR(-ENOMEM);
 
@@ -1286,7 +1293,7 @@ ctnetlink_create_conntrack(const struct nlattr * const cda[],
                if (err < 0)
                        goto err2;
 
-               master_h = nf_conntrack_find_get(&init_net, &master);
+               master_h = nf_conntrack_find_get(net, &master);
                if (master_h == NULL) {
                        err = -ENOENT;
                        goto err2;
@@ -1314,6 +1321,7 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
                        const struct nlmsghdr *nlh,
                        const struct nlattr * const cda[])
 {
+       struct net *net = sock_net(ctnl);
        struct nf_conntrack_tuple otuple, rtuple;
        struct nf_conntrack_tuple_hash *h = NULL;
        struct nfgenmsg *nfmsg = nlmsg_data(nlh);
@@ -1334,9 +1342,9 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
 
        spin_lock_bh(&nf_conntrack_lock);
        if (cda[CTA_TUPLE_ORIG])
-               h = __nf_conntrack_find(&init_net, &otuple);
+               h = __nf_conntrack_find(net, &otuple);
        else if (cda[CTA_TUPLE_REPLY])
-               h = __nf_conntrack_find(&init_net, &rtuple);
+               h = __nf_conntrack_find(net, &rtuple);
 
        if (h == NULL) {
                err = -ENOENT;
@@ -1344,7 +1352,7 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
                        struct nf_conn *ct;
                        enum ip_conntrack_events events;
 
-                       ct = ctnetlink_create_conntrack(cda, &otuple,
+                       ct = ctnetlink_create_conntrack(net, cda, &otuple,
                                                        &rtuple, u3);
                        if (IS_ERR(ct)) {
                                err = PTR_ERR(ct);
@@ -1526,9 +1534,10 @@ nla_put_failure:
 static int
 ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
 {
+       struct nf_conntrack_expect *exp = item->exp;
+       struct net *net = nf_ct_exp_net(exp);
        struct nlmsghdr *nlh;
        struct nfgenmsg *nfmsg;
-       struct nf_conntrack_expect *exp = item->exp;
        struct sk_buff *skb;
        unsigned int type;
        int flags = 0;
@@ -1540,7 +1549,7 @@ ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
                return 0;
 
        if (!item->report &&
-           !nfnetlink_has_listeners(&init_net, NFNLGRP_CONNTRACK_EXP_NEW))
+           !nfnetlink_has_listeners(net, NFNLGRP_CONNTRACK_EXP_NEW))
                return 0;
 
        skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
@@ -1563,7 +1572,7 @@ ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item)
        rcu_read_unlock();
 
        nlmsg_end(skb, nlh);
-       nfnetlink_send(skb, &init_net, item->pid, NFNLGRP_CONNTRACK_EXP_NEW,
+       nfnetlink_send(skb, net, item->pid, NFNLGRP_CONNTRACK_EXP_NEW,
                       item->report, GFP_ATOMIC);
        return 0;
 
@@ -1573,7 +1582,7 @@ nla_put_failure:
 nlmsg_failure:
        kfree_skb(skb);
 errout:
-       nfnetlink_set_err(&init_net, 0, 0, -ENOBUFS);
+       nfnetlink_set_err(net, 0, 0, -ENOBUFS);
        return 0;
 }
 #endif
@@ -1587,7 +1596,7 @@ static int ctnetlink_exp_done(struct netlink_callback *cb)
 static int
 ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
 {
-       struct net *net = &init_net;
+       struct net *net = sock_net(skb->sk);
        struct nf_conntrack_expect *exp, *last;
        struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
        struct hlist_node *n;
@@ -1640,6 +1649,7 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
                     const struct nlmsghdr *nlh,
                     const struct nlattr * const cda[])
 {
+       struct net *net = sock_net(ctnl);
        struct nf_conntrack_tuple tuple;
        struct nf_conntrack_expect *exp;
        struct sk_buff *skb2;
@@ -1661,7 +1671,7 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
        if (err < 0)
                return err;
 
-       exp = nf_ct_expect_find_get(&init_net, &tuple);
+       exp = nf_ct_expect_find_get(net, &tuple);
        if (!exp)
                return -ENOENT;
 
@@ -1701,6 +1711,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
                     const struct nlmsghdr *nlh,
                     const struct nlattr * const cda[])
 {
+       struct net *net = sock_net(ctnl);
        struct nf_conntrack_expect *exp;
        struct nf_conntrack_tuple tuple;
        struct nf_conntrack_helper *h;
@@ -1717,7 +1728,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
                        return err;
 
                /* bump usage count to 2 */
-               exp = nf_ct_expect_find_get(&init_net, &tuple);
+               exp = nf_ct_expect_find_get(net, &tuple);
                if (!exp)
                        return -ENOENT;
 
@@ -1747,7 +1758,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
                }
                for (i = 0; i < nf_ct_expect_hsize; i++) {
                        hlist_for_each_entry_safe(exp, n, next,
-                                                 &init_net.ct.expect_hash[i],
+                                                 &net->ct.expect_hash[i],
                                                  hnode) {
                                m_help = nfct_help(exp->master);
                                if (m_help->helper == h
@@ -1763,7 +1774,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
                spin_lock_bh(&nf_conntrack_lock);
                for (i = 0; i < nf_ct_expect_hsize; i++) {
                        hlist_for_each_entry_safe(exp, n, next,
-                                                 &init_net.ct.expect_hash[i],
+                                                 &net->ct.expect_hash[i],
                                                  hnode) {
                                if (del_timer(&exp->timeout)) {
                                        nf_ct_unlink_expect(exp);
@@ -1784,7 +1795,8 @@ ctnetlink_change_expect(struct nf_conntrack_expect *x,
 }
 
 static int
-ctnetlink_create_expect(const struct nlattr * const cda[], u_int8_t u3,
+ctnetlink_create_expect(struct net *net, const struct nlattr * const cda[],
+                       u_int8_t u3,
                        u32 pid, int report)
 {
        struct nf_conntrack_tuple tuple, mask, master_tuple;
@@ -1806,7 +1818,7 @@ ctnetlink_create_expect(const struct nlattr * const cda[], u_int8_t u3,
                return err;
 
        /* Look for master conntrack of this expectation */
-       h = nf_conntrack_find_get(&init_net, &master_tuple);
+       h = nf_conntrack_find_get(net, &master_tuple);
        if (!h)
                return -ENOENT;
        ct = nf_ct_tuplehash_to_ctrack(h);
@@ -1846,6 +1858,7 @@ ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
                     const struct nlmsghdr *nlh,
                     const struct nlattr * const cda[])
 {
+       struct net *net = sock_net(ctnl);
        struct nf_conntrack_tuple tuple;
        struct nf_conntrack_expect *exp;
        struct nfgenmsg *nfmsg = nlmsg_data(nlh);
@@ -1862,13 +1875,13 @@ ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
                return err;
 
        spin_lock_bh(&nf_conntrack_lock);
-       exp = __nf_ct_expect_find(&init_net, &tuple);
+       exp = __nf_ct_expect_find(net, &tuple);
 
        if (!exp) {
                spin_unlock_bh(&nf_conntrack_lock);
                err = -ENOENT;
                if (nlh->nlmsg_flags & NLM_F_CREATE) {
-                       err = ctnetlink_create_expect(cda,
+                       err = ctnetlink_create_expect(net, cda,
                                                      u3,
                                                      NETLINK_CB(skb).pid,
                                                      nlmsg_report(nlh));