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| author |   Chenbo Feng <fengc@google.com> | 2017-04-05 19:00:55 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-04-08 08:07:01 -0700 |
| commit | 5daab9db7b65df87da26fd8cfa695fb9546a1ddb (patch) | |
| tree | 92c586ee206c95658ffd47df5c8fd33fa85b64a3 /net | |
| parent | Merge tag 'mlx5-updates-2017-04-16' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux (diff) | |
| download | linux-dev-5daab9db7b65df87da26fd8cfa695fb9546a1ddb.tar.xz linux-dev-5daab9db7b65df87da26fd8cfa695fb9546a1ddb.zip | |
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 <willemb@google.com>
Signed-off-by: Chenbo Feng <fengc@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/sock.c | 8 |
1 files changed, 8 insertions, 0 deletions
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). |