diff options
| author |   Maxim Mikityanskiy <maximmi@mellanox.com> | 2019-06-26 17:35:26 +0300 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2019-06-27 22:53:26 +0200 |
| commit | 2761ed4b6e192820760d5ba913834b2ba05fd08c (patch) | |
| tree | 26010190bfeb164491314a76275ac0177ce33491 /tools/lib | |
| parent | xsk: Add getsockopt XDP_OPTIONS (diff) | |
| download | linux-dev-2761ed4b6e192820760d5ba913834b2ba05fd08c.tar.xz linux-dev-2761ed4b6e192820760d5ba913834b2ba05fd08c.zip | |
libbpf: Support getsockopt XDP_OPTIONS
Query XDP_OPTIONS in libbpf to determine if the zero-copy mode is active
or not.
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 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/xsk.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/lib/bpf/xsk.c b/tools/lib/bpf/xsk.c index 7ef6293b4fd7..bf15a80a37c2 100644 --- a/tools/lib/bpf/xsk.c +++ b/tools/lib/bpf/xsk.c @@ -65,6 +65,7 @@ struct xsk_socket { int xsks_map_fd; __u32 queue_id; char ifname[IFNAMSIZ]; + bool zc; }; struct xsk_nl_info { @@ -480,6 +481,7 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname, void *rx_map = NULL, *tx_map = NULL; struct sockaddr_xdp sxdp = {}; struct xdp_mmap_offsets off; + struct xdp_options opts; struct xsk_socket *xsk; socklen_t optlen; int err; @@ -597,6 +599,16 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname, } xsk->prog_fd = -1; + + optlen = sizeof(opts); + err = getsockopt(xsk->fd, SOL_XDP, XDP_OPTIONS, &opts, &optlen); + if (err) { + err = -errno; + goto out_mmap_tx; + } + + xsk->zc = opts.flags & XDP_OPTIONS_ZEROCOPY; + if (!(xsk->config.libbpf_flags & XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD)) { err = xsk_setup_xdp_prog(xsk); if (err) |