Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...

[karo-tx-linux.git] / net / netlink / af_netlink.c

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index a7ec8512f552e30790fc28fa8ba4fb8b747ddb17..0a4db0211da08416dc23bc55bfb5b203809bbd34 100644 (file)
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1659,13 +1659,10 @@ static int netlink_dump(struct sock *sk)
 {
        struct netlink_sock *nlk = nlk_sk(sk);
        struct netlink_callback *cb;
-       struct sk_buff *skb;
+       struct sk_buff *skb = NULL;
        struct nlmsghdr *nlh;
        int len, err = -ENOBUFS;
-
-       skb = sock_rmalloc(sk, NLMSG_GOODSIZE, 0, GFP_KERNEL);
-       if (!skb)
-               goto errout;
+       int alloc_size;
 
        mutex_lock(nlk->cb_mutex);
 
@@ -1675,6 +1672,12 @@ static int netlink_dump(struct sock *sk)
                goto errout_skb;
        }
 
+       alloc_size = max_t(int, cb->min_dump_alloc, NLMSG_GOODSIZE);
+
+       skb = sock_rmalloc(sk, alloc_size, 0, GFP_KERNEL);
+       if (!skb)
+               goto errout_skb;
+
        len = cb->dump(skb, cb);
 
        if (len > 0) {
@@ -1715,7 +1718,6 @@ static int netlink_dump(struct sock *sk)
 errout_skb:
        mutex_unlock(nlk->cb_mutex);
        kfree_skb(skb);
-errout:
        return err;
 }
 
@@ -1723,7 +1725,8 @@ int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
                       const struct nlmsghdr *nlh,
                       int (*dump)(struct sk_buff *skb,
                                   struct netlink_callback *),
-                      int (*done)(struct netlink_callback *))
+                      int (*done)(struct netlink_callback *),
+                      u16 min_dump_alloc)
 {
        struct netlink_callback *cb;
        struct sock *sk;
@@ -1737,6 +1740,7 @@ int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
        cb->dump = dump;
        cb->done = done;
        cb->nlh = nlh;
+       cb->min_dump_alloc = min_dump_alloc;
        atomic_inc(&skb->users);
        cb->skb = skb;