From 5daab9db7b65df87da26fd8cfa695fb9546a1ddb Mon Sep 17 00:00:00 2001 From: Chenbo Feng Date: Wed, 5 Apr 2017 19:00:55 -0700 Subject: New getsockopt option to get socket cookie Introduce a new getsockopt operation to retrieve the socket cookie for a specific socket based on the socket fd. It returns a unique non-decreasing cookie for each socket. Tested: https://android-review.googlesource.com/#/c/358163/ Acked-by: Willem de Bruijn Signed-off-by: Chenbo Feng Signed-off-by: David S. Miller --- net/core/sock.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'net') diff --git a/net/core/sock.c b/net/core/sock.c index 392f9b6f96e2..a06bb7a2a689 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1083,6 +1083,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname, union { int val; + u64 val64; struct linger ling; struct timeval tm; } v; @@ -1340,6 +1341,13 @@ int sock_getsockopt(struct socket *sock, int level, int optname, break; #endif + case SO_COOKIE: + lv = sizeof(u64); + if (len < lv) + return -EINVAL; + v.val64 = sock_gen_cookie(sk); + break; + default: /* We implement the SO_SNDLOWAT etc to not be settable * (1003.1g 7). -- cgit v1.2.3-59-g8ed1b