net: af_unix can make unix_nr_socks visbile in /proc

Currently, /proc/net/protocols displays socket counts only for TCP/TCPv6
protocols

We can provide unix_nr_socks for free here, this counter being
already maintained in af_unix

Before patch :

# grep UNIX /proc/net/protocols
UNIX       428     -1      -1   NI       0   yes  kernel

After patch :

# grep UNIX /proc/net/protocols
UNIX       428     98      -1   NI       0   yes  kernel

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 3 deletions

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 58db2a2f115a..a1eb5969712c 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -566,9 +566,10 @@ static const struct proto_ops unix_seqpacket_ops = {
 };
 
 static struct proto unix_proto = {
-        .name     = "UNIX",
-        .owner    = THIS_MODULE,
-        .obj_size = sizeof(struct unix_sock),
+        .name                   = "UNIX",
+        .owner                  = THIS_MODULE,
+        .sockets_allocated      = &unix_nr_socks,
+        .obj_size               = sizeof(struct unix_sock),
 };
 
 /*