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authorFlorent Fourcot <florent.fourcot@enst-bretagne.fr>2013-11-07 17:53:12 +0100
committerDavid S. Miller <davem@davemloft.net>2013-11-08 13:42:57 -0500
commit3fdfa5ff50aee5b524fb22b6e0e511b73752a257 (patch)
tree8f29df0bc744c02169588a0719bb67a306705c8e /net/ipv6/ip6_flowlabel.c
parent3797d3e8462efdaadb64164ca540626b55fe8336 (diff)
downloadop-kernel-dev-3fdfa5ff50aee5b524fb22b6e0e511b73752a257.zip
op-kernel-dev-3fdfa5ff50aee5b524fb22b6e0e511b73752a257.tar.gz
ipv6: enable IPV6_FLOWLABEL_MGR for getsockopt
It is already possible to set/put/renew a label with IPV6_FLOWLABEL_MGR and setsockopt. This patch add the possibility to get information about this label (current value, time before expiration, etc). It helps application to take decision for a renew or a release of the label. v2: * Add spin_lock to prevent race condition * return -ENOENT if no result found * check if flr_action is GET v3: * move the spin_lock to protect only the relevant code Signed-off-by: Florent Fourcot <florent.fourcot@enst-bretagne.fr> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_flowlabel.c')
-rw-r--r--net/ipv6/ip6_flowlabel.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index 819578e..4a06ed0 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -475,6 +475,32 @@ static inline void fl_link(struct ipv6_pinfo *np, struct ipv6_fl_socklist *sfl,
spin_unlock_bh(&ip6_sk_fl_lock);
}
+int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct ipv6_fl_socklist *sfl;
+
+ rcu_read_lock_bh();
+
+ for_each_sk_fl_rcu(np, sfl) {
+ if (sfl->fl->label == (np->flow_label & IPV6_FLOWLABEL_MASK)) {
+ spin_lock_bh(&ip6_fl_lock);
+ freq->flr_label = sfl->fl->label;
+ freq->flr_dst = sfl->fl->dst;
+ freq->flr_share = sfl->fl->share;
+ freq->flr_expires = (sfl->fl->expires - jiffies) / HZ;
+ freq->flr_linger = sfl->fl->linger / HZ;
+
+ spin_unlock_bh(&ip6_fl_lock);
+ rcu_read_unlock_bh();
+ return 0;
+ }
+ }
+ rcu_read_unlock_bh();
+
+ return -ENOENT;
+}
+
int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen)
{
int uninitialized_var(err);
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