Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / net / netfilter / nf_conntrack_netlink.c

diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index b729ace1dcc14614d88c51edc6f8968f9cb0a71f..eead9db6f899ad71869013dec0b3e2de480361a1 100644 (file)
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -254,7 +254,7 @@ ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct)
 
        ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
        if (ret)
-               return ret;
+               return 0;
 
        ret = -1;
        nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED);
@@ -453,16 +453,22 @@ ctnetlink_counters_size(const struct nf_conn *ct)
               ;
 }
 
-#ifdef CONFIG_NF_CONNTRACK_SECMARK
-static int ctnetlink_nlmsg_secctx_size(const struct nf_conn *ct)
+static inline int
+ctnetlink_secctx_size(const struct nf_conn *ct)
 {
-       int len;
+#ifdef CONFIG_NF_CONNTRACK_SECMARK
+       int len, ret;
 
-       security_secid_to_secctx(ct->secmark, NULL, &len);
+       ret = security_secid_to_secctx(ct->secmark, NULL, &len);
+       if (ret)
+               return 0;
 
-       return sizeof(char) * len;
-}
+       return nla_total_size(0) /* CTA_SECCTX */
+              + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */
+#else
+       return 0;
 #endif
+}
 
 static inline size_t
 ctnetlink_nlmsg_size(const struct nf_conn *ct)
@@ -479,10 +485,7 @@ ctnetlink_nlmsg_size(const struct nf_conn *ct)
               + nla_total_size(0) /* CTA_PROTOINFO */
               + nla_total_size(0) /* CTA_HELP */
               + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
-#ifdef CONFIG_NF_CONNTRACK_SECMARK
-              + nla_total_size(0) /* CTA_SECCTX */
-              + nla_total_size(ctnetlink_nlmsg_secctx_size(ct)) /* CTA_SECCTX_NAME */
-#endif
+              + ctnetlink_secctx_size(ct)
 #ifdef CONFIG_NF_NAT_NEEDED
               + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
               + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */
@@ -642,30 +645,29 @@ ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
        struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
        u_int8_t l3proto = nfmsg->nfgen_family;
 
-       rcu_read_lock();
+       spin_lock_bh(&nf_conntrack_lock);
        last = (struct nf_conn *)cb->args[1];
        for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) {
 restart:
-               hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[cb->args[0]],
+               hlist_nulls_for_each_entry(h, n, &net->ct.hash[cb->args[0]],
                                         hnnode) {
                        if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
                                continue;
                        ct = nf_ct_tuplehash_to_ctrack(h);
-                       if (!atomic_inc_not_zero(&ct->ct_general.use))
-                               continue;
                        /* Dump entries of a given L3 protocol number.
                         * If it is not specified, ie. l3proto == 0,
                         * then dump everything. */
                        if (l3proto && nf_ct_l3num(ct) != l3proto)
-                               goto releasect;
+                               continue;
                        if (cb->args[1]) {
                                if (ct != last)
-                                       goto releasect;
+                                       continue;
                                cb->args[1] = 0;
                        }
                        if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
                                                cb->nlh->nlmsg_seq,
                                                IPCTNL_MSG_CT_NEW, ct) < 0) {
+                               nf_conntrack_get(&ct->ct_general);
                                cb->args[1] = (unsigned long)ct;
                                goto out;
                        }
@@ -678,8 +680,6 @@ restart:
                                if (acct)
                                        memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX]));
                        }
-releasect:
-               nf_ct_put(ct);
                }
                if (cb->args[1]) {
                        cb->args[1] = 0;
@@ -687,7 +687,7 @@ releasect:
                }
        }
 out:
-       rcu_read_unlock();
+       spin_unlock_bh(&nf_conntrack_lock);
        if (last)
                nf_ct_put(last);
 
@@ -973,7 +973,8 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
 free:
        kfree_skb(skb2);
 out:
-       return err;
+       /* this avoids a loop in nfnetlink. */
+       return err == -EAGAIN ? -ENOBUFS : err;
 }
 
 #ifdef CONFIG_NF_NAT_NEEDED