4 files changed, 14 insertions, 3 deletions

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 6d80f51897a5..78d3d5124918 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -253,7 +253,8 @@ struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space,
                                          struct ipv6_txoptions *fopt);
 void fl6_free_socklist(struct sock *sk);
 int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
-int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq);
+int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,
+                           int flags);
 int ip6_flowlabel_init(void);
 void ip6_flowlabel_cleanup(void);
 
diff --git a/include/uapi/linux/in6.h b/include/uapi/linux/in6.h
index 02c0cd685a27..633b93cac1ed 100644
--- a/include/uapi/linux/in6.h
+++ b/include/uapi/linux/in6.h
@@ -86,6 +86,7 @@ struct in6_flowlabel_req {
 #define IPV6_FL_F_CREATE        1
 #define IPV6_FL_F_EXCL          2
 #define IPV6_FL_F_REFLECT       4
+#define IPV6_FL_F_REMOTE        8
 
 #define IPV6_FL_S_NONE          0
 #define IPV6_FL_S_EXCL          1
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index 55823f187446..01bf2524c72a 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -481,11 +481,17 @@ 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)
+int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,
+                           int flags)
 {
         struct ipv6_pinfo *np = inet6_sk(sk);
         struct ipv6_fl_socklist *sfl;
 
+        if (flags & IPV6_FL_F_REMOTE) {
+                freq->flr_label = np->rcv_flowinfo & IPV6_FLOWLABEL_MASK;
+                return 0;
+        }
+
         if (np->repflow) {
                 freq->flr_label = np->flow_label;
                 return 0;
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 2855b00ed49d..7024a874e901 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -1221,6 +1221,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
         case IPV6_FLOWLABEL_MGR:
         {
                 struct in6_flowlabel_req freq;
+                int flags;
 
                 if (len < sizeof(freq))
                         return -EINVAL;
@@ -1232,9 +1233,11 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
                         return -EINVAL;
 
                 len = sizeof(freq);
+                flags = freq.flr_flags;
+
                 memset(&freq, 0, sizeof(freq));
 
-                val = ipv6_flowlabel_opt_get(sk, &freq);
+                val = ipv6_flowlabel_opt_get(sk, &freq, flags);
                 if (val < 0)
                         return val;