From: John Fastabend <john.fastabend@gmail.com>
To: Maciej Fijalkowski <maciej.fijalkowski@intel.com>,
bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net
Cc: netdev@vger.kernel.org, magnus.karlsson@intel.com,
bjorn@kernel.org, kuba@kernel.org,
Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Subject: RE: [PATCH v4 bpf-next 05/10] selftests: xsk: query for native XDP support
Date: Fri, 17 Jun 2022 19:12:00 -0700 [thread overview]
Message-ID: <62ad3470573f9_24b342082e@john.notmuch> (raw)
In-Reply-To: <20220616180609.905015-6-maciej.fijalkowski@intel.com>
Maciej Fijalkowski wrote:
> Currently, xdpxceiver assumes that underlying device supports XDP in
> native mode - it is fine by now since tests can run only on a veth pair.
> Future commit is going to allow running test suite against physical
> devices, so let us query the device if it is capable of running XDP
> programs in native mode. This way xdpxceiver will not try to run
> TEST_MODE_DRV if device being tested is not supporting it.
>
> Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
> Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
> ---
> tools/testing/selftests/bpf/xdpxceiver.c | 36 ++++++++++++++++++++++--
> 1 file changed, 34 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/xdpxceiver.c b/tools/testing/selftests/bpf/xdpxceiver.c
> index e5992a6b5e09..a1e410f6a5d8 100644
> --- a/tools/testing/selftests/bpf/xdpxceiver.c
> +++ b/tools/testing/selftests/bpf/xdpxceiver.c
> @@ -98,6 +98,8 @@
> #include <unistd.h>
> #include <stdatomic.h>
> #include <bpf/xsk.h>
> +#include <bpf/bpf.h>
> +#include <linux/filter.h>
> #include "xdpxceiver.h"
> #include "../kselftest.h"
>
> @@ -1605,10 +1607,37 @@ static void ifobject_delete(struct ifobject *ifobj)
> free(ifobj);
> }
>
> +static bool is_xdp_supported(struct ifobject *ifobject)
> +{
> + int flags = XDP_FLAGS_DRV_MODE;
> +
> + LIBBPF_OPTS(bpf_link_create_opts, opts, .flags = flags);
> + struct bpf_insn insns[2] = {
> + BPF_MOV64_IMM(BPF_REG_0, XDP_PASS),
> + BPF_EXIT_INSN()
> + };
> + int ifindex = if_nametoindex(ifobject->ifname);
> + int prog_fd, insn_cnt = ARRAY_SIZE(insns);
> + int err;
> +
> + prog_fd = bpf_prog_load(BPF_PROG_TYPE_XDP, NULL, "GPL", insns, insn_cnt, NULL);
> + if (prog_fd < 0)
> + return false;
> +
> + err = bpf_xdp_attach(ifindex, prog_fd, flags, NULL);
> + if (err)
Best not to leave around prog_fd in the error case or in the
good case.
> + return false;
> +
> + bpf_xdp_detach(ifindex, flags, NULL);
> +
close(prog_fd)
> + return true;
> +}
> +
next prev parent reply other threads:[~2022-06-18 2:12 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-16 18:05 [PATCH v4 bpf-next 00/10] AF_XDP ZC selftests Maciej Fijalkowski
2022-06-16 18:06 ` [PATCH v4 bpf-next 01/10] ice: compress branches in ice_set_features() Maciej Fijalkowski
2022-06-18 1:46 ` John Fastabend
2022-06-20 9:48 ` Maciej Fijalkowski
2022-06-16 18:06 ` [PATCH v4 bpf-next 02/10] ice: allow toggling loopback mode via ndo_set_features callback Maciej Fijalkowski
2022-06-16 18:21 ` Jakub Kicinski
2022-06-18 1:57 ` John Fastabend
2022-06-20 9:52 ` Maciej Fijalkowski
2022-06-16 18:06 ` [PATCH v4 bpf-next 03/10] ice: check DD bit on Rx descriptor rather than (EOP | RS) Maciej Fijalkowski
2022-06-18 1:58 ` John Fastabend
2022-06-20 10:53 ` Maciej Fijalkowski
2022-06-16 18:06 ` [PATCH v4 bpf-next 04/10] ice: do not setup vlan for loopback VSI Maciej Fijalkowski
2022-06-18 2:01 ` John Fastabend
2022-06-16 18:06 ` [PATCH v4 bpf-next 05/10] selftests: xsk: query for native XDP support Maciej Fijalkowski
2022-06-18 2:12 ` John Fastabend [this message]
2022-06-20 10:55 ` Maciej Fijalkowski
2022-06-16 18:06 ` [PATCH v4 bpf-next 06/10] selftests: xsk: add missing close() on netns fd Maciej Fijalkowski
2022-06-18 2:14 ` John Fastabend
2022-06-16 18:06 ` [PATCH v4 bpf-next 07/10] selftests: xsk: introduce default Rx pkt stream Maciej Fijalkowski
2022-06-18 2:41 ` John Fastabend
2022-06-20 8:41 ` Magnus Karlsson
2022-06-16 18:06 ` [PATCH v4 bpf-next 08/10] selftests: xsk: add support for executing tests on physical device Maciej Fijalkowski
2022-06-16 18:06 ` [PATCH v4 bpf-next 09/10] selftests: xsk: rely on pkts_in_flight in wait_for_tx_completion() Maciej Fijalkowski
2022-06-18 2:56 ` John Fastabend
2022-06-20 12:02 ` Maciej Fijalkowski
2022-06-20 16:36 ` John Fastabend
2022-06-16 18:06 ` [PATCH v4 bpf-next 10/10] selftests: xsk: add support for zero copy testing Maciej Fijalkowski
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