aboutsummaryrefslogtreecommitdiffstats
path: root/net/phonet
diff options
context:
space:
mode:
authorJohannes Berg <johannes.berg@intel.com>2015-01-19 12:15:24 +0100
committerDavid S. Miller <davem@davemloft.net>2015-01-19 16:20:17 -0500
commit926e9878a360fc57112259949c44c74c31709cc6 (patch)
tree156970a8248c5512200df2718c242bb3535d74ef /net/phonet
parentfc83477780174dc6aa673e644428b1d2f3894e7a (diff)
phonet netlink: allow multiple messages per skb in route dump
My previous patch to this file changed the code to be bug-compatible towards userspace. Unless userspace (which I wasn't able to find) implements the dump reader by hand in a wrong way, this isn't needed. If it uses libnl or similar code putting multiple messages into a single SKB is far more efficient. Change the code to do this. While at it, also clean it up and don't use so many variables - just store the address in the callback args directly. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/phonet')
-rw-r--r--net/phonet/pn_netlink.c22
1 files changed, 7 insertions, 15 deletions
diff --git a/net/phonet/pn_netlink.c b/net/phonet/pn_netlink.c
index 54d766842c2b..bc5ee5fbe6ae 100644
--- a/net/phonet/pn_netlink.c
+++ b/net/phonet/pn_netlink.c
@@ -272,31 +272,23 @@ static int route_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
static int route_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
- u8 addr, addr_idx = 0, addr_start_idx = cb->args[0];
+ u8 addr;
rcu_read_lock();
- for (addr = 0; addr < 64; addr++) {
- struct net_device *dev;
+ for (addr = cb->args[0]; addr < 64; addr++) {
+ struct net_device *dev = phonet_route_get_rcu(net, addr << 2);
- dev = phonet_route_get_rcu(net, addr << 2);
if (!dev)
continue;
- if (addr_idx++ < addr_start_idx)
- continue;
- fill_route(skb, dev, addr << 2, NETLINK_CB(cb->skb).portid,
- cb->nlh->nlmsg_seq, RTM_NEWROUTE);
- /* fill_route() used to return > 0 (or negative errors) but
- * never 0 - ignore the return value and just go out to
- * call dumpit again from outside to preserve the behavior
- */
- goto out;
+ if (fill_route(skb, dev, addr << 2, NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, RTM_NEWROUTE) < 0)
+ goto out;
}
out:
rcu_read_unlock();
- cb->args[0] = addr_idx;
- cb->args[1] = 0;
+ cb->args[0] = addr;
return skb->len;
}

Privacy Policy