From: Tariq Toukan <tariqt@mellanox.com>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
bjorn.topel@intel.com,
Magnus Karlsson <magnus.karlsson@intel.com>
Cc: "bpf@vger.kernel.org" <bpf@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Jonathan Lemon <bsd@fb.com>,
"David S. Miller" <davem@davemloft.net>,
Maxim Mikityanskiy <maximmi@mellanox.com>,
Tariq Toukan <tariqt@mellanox.com>
Subject: [PATCH bpf-next V6 04/16] libbpf: Support getsockopt XDP_OPTIONS
Date: Wed, 26 Jun 2019 17:35:26 +0300 [thread overview]
Message-ID: <1561559738-4213-5-git-send-email-tariqt@mellanox.com> (raw)
In-Reply-To: <1561559738-4213-1-git-send-email-tariqt@mellanox.com>
From: Maxim Mikityanskiy <maximmi@mellanox.com>
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>
---
tools/lib/bpf/xsk.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
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)
--
1.8.3.1
next prev parent reply other threads:[~2019-06-26 14:36 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-26 14:35 [PATCH bpf-next V6 00/16] AF_XDP infrastructure improvements and mlx5e support Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 01/16] net/mlx5e: Attach/detach XDP program safely Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 02/16] xsk: Add API to check for available entries in FQ Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 03/16] xsk: Add getsockopt XDP_OPTIONS Tariq Toukan
2019-06-26 14:35 ` Tariq Toukan [this message]
2019-06-26 14:35 ` [PATCH bpf-next V6 05/16] xsk: Change the default frame size to 4096 and allow controlling it Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 06/16] xsk: Return the whole xdp_desc from xsk_umem_consume_tx Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 07/16] net/mlx5e: Replace deprecated PCI_DMA_TODEVICE Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 08/16] net/mlx5e: Calculate linear RX frag size considering XSK Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 09/16] net/mlx5e: Allow ICO SQ to be used by multiple RQs Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 10/16] net/mlx5e: Refactor struct mlx5e_xdp_info Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 11/16] net/mlx5e: Share the XDP SQ for XDP_TX between RQs Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 12/16] net/mlx5e: XDP_TX from UMEM support Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 13/16] net/mlx5e: Consider XSK in XDP MTU limit calculation Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 14/16] net/mlx5e: Encapsulate open/close queues into a function Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 15/16] net/mlx5e: Move queue param structs to en/params.h Tariq Toukan
2019-06-26 14:35 ` [PATCH bpf-next V6 16/16] net/mlx5e: Add XSK zero-copy support Tariq Toukan
2019-06-26 16:29 ` [PATCH bpf-next V6 00/16] AF_XDP infrastructure improvements and mlx5e support Björn Töpel
2019-06-26 16:46 ` Jonathan Lemon
2019-06-26 20:26 ` Daniel Borkmann
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