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bpf, xdp: Add tracepoint to xdp attaching failure #5371

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bpf, xdp: Add tracepoint to xdp attaching failure #5371

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kernel-patches-daemon-bpf[bot]
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Pull request for series with
subject: bpf, xdp: Add tracepoint to xdp attaching failure
version: 3
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=767401

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Upstream branch: 8daf847
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767401
version: 3

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Upstream branch: 492e797
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767401
version: 3

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Upstream branch: 3226e31
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767401
version: 3

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Upstream branch: 24cc756
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767401
version: 3

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Upstream branch: 41ee014
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767401
version: 3

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Upstream branch: 6f5a630
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767401
version: 3

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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=767401 expired. Closing PR.

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Upstream branch: b446934
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767906
version: 3

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Upstream branch: 5322a27
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767906
version: 3

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Upstream branch: dc644b5
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767906
version: 3

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Upstream branch: 7b2b201
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767906
version: 3

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Upstream branch: 36397a1
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767906
version: 3

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Upstream branch: 13fd5e1
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767906
version: 3

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Upstream branch: 63e2da3
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767906
version: 3

@Asphaltt
bpf, xdp: Add tracepoint to xdp attaching failure
6f776a8 
When error happens in dev_xdp_attach(), it should have a way to tell
users the error message like the netlink approach.

To avoid breaking uapi, adding a tracepoint in bpf_xdp_link_attach() is
an appropriate way to notify users the error message.

Hence, bpf libraries are able to retrieve the error message by this
tracepoint, and then report the error message to users.

Signed-off-by: Leon Hwang <hffilwlqm@gmail.com>
@Asphaltt
selftests/bpf: Add testcase for xdp attaching failure tracepoint
cd4a038 
Add a test case for the tracepoint of xdp attaching failure by bpf
tracepoint when attach XDP to a device with invalid flags option.

The bpf tracepoint retrieves error message from the tracepoint, and
then put the error message to a perf buffer. The testing code receives
error message from perf buffer, and then ASSERT "Invalid XDP flags for
BPF link attachment".

Signed-off-by: Leon Hwang <hffilwlqm@gmail.com>
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Upstream branch: 63e2da3
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=767906
version: 3

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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=767906 expired. Closing PR.

@kernel-patches-daemon-bpf kernel-patches-daemon-bpf bot deleted the series/767401=>bpf-next branch July 29, 2023 05:03
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