diff options
| author | Maxim Mikityanskiy | 2019-06-26 17:35:25 +0300 |
|---|---|---|
| committer | Daniel Borkmann | 2019-06-27 22:53:26 +0200 |
| commit | 2640d3c8123223e0a205b2a25a446df6f072b3ea (patch) | |
| tree | 363a9ed3c58920994273d03e3c8aa976382f181e /net/xdp/xsk.c | |
| parent | d57d76428ae9abca51fb89f9326da9d4b1cf8270 (diff) | |
xsk: Add getsockopt XDP_OPTIONS
Make it possible for the application to determine whether the AF_XDP
socket is running in zero-copy mode. To achieve this, add a new
getsockopt option XDP_OPTIONS that returns flags. The only flag
supported for now is the zero-copy mode indicator.
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net/xdp/xsk.c')
| -rw-r--r-- | net/xdp/xsk.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index b68a380f50b3..35ca531ac74e 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -650,6 +650,26 @@ static int xsk_getsockopt(struct socket *sock, int level, int optname, return 0; } + case XDP_OPTIONS: + { + struct xdp_options opts = {}; + + if (len < sizeof(opts)) + return -EINVAL; + + mutex_lock(&xs->mutex); + if (xs->zc) + opts.flags |= XDP_OPTIONS_ZEROCOPY; + mutex_unlock(&xs->mutex); + + len = sizeof(opts); + if (copy_to_user(optval, &opts, len)) + return -EFAULT; + if (put_user(len, optlen)) + return -EFAULT; + + return 0; + } default: break; } |