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bpf, sockmap: Introduce tracing capability for sockmap #8763

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Pull request for series with
subject: bpf, sockmap: Introduce tracing capability for sockmap
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=951492

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series: https://patchwork.kernel.org/project/netdevbpf/list/?series=951492
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=951492 expired. Closing PR.

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series: https://patchwork.kernel.org/project/netdevbpf/list/?series=952401
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=952401 expired. Closing PR.

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Upstream branch: 6aca583
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=953164
version: 3

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series: https://patchwork.kernel.org/project/netdevbpf/list/?series=953164
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Upstream branch: 60400cd
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=953164
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series: https://patchwork.kernel.org/project/netdevbpf/list/?series=953164
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Upstream branch: 91dbac4
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=953164
version: 3

mrpre added 2 commits April 28, 2025 08:58
@mrpre
bpf, sockmap: Introduce tracing capability for sockmap
ca3c85c 
Sockmap has the same high-performance forwarding capability as XDP, but
operates at Layer 7.

Introduce tracing capability for sockmap, to trace the execution results
of BPF programs without modifying the programs themselves, similar to
the existing trace_xdp_redirect{_map}.

It is crucial for debugging sockmap programs, especially in production
environments.

Additionally, the new header file has to be added to bpf_trace.h to
automatically generate tracepoints.

Test results:
$ echo "1" > /sys/kernel/tracing/events/sockmap/enable

msg/skb:
'''
sockmap_redirect: sk=000000000ec02a93, netns=4026531840, inode=318, \
family=2, protocol=6, prog_id=59, len=8192, type=msg, action=REDIRECT, \
redirect_type=ingress

sockmap_redirect: sk=00000000d5d9c931, netns=4026531840, inode=64731, \
family=2, protocol=6, prog_id=91, len=8221, type=skb, action=REDIRECT, \
redirect_type=egress

sockmap_redirect: sk=00000000106fc281, netns=4026531840, inode=64729, \
family=2, protocol=6, prog_id=94, len=8192, type=msg, action=PASS, \
redirect_type=none
'''

strparser:
'''
sockmap_strparser: sk=00000000f15fc1c8, netns=4026531840, inode=52396, \
family=2, protocol=6, prog_id=143, in_len=1000, full_len=10
'''

Suggested-by: Jakub Sitnicki <[email protected]>
Suggested-by: Cong Wang <[email protected]>
Suggested-by: Steven Rostedt <[email protected]>
Signed-off-by: Jiayuan Chen <[email protected]>
Reviewed-by: Cong Wang <[email protected]>
@mrpre
bpf: relocates the BPF net tracepoint definitions
61bde7d 
This commit relocates the BPF tracepoint definitions for XDP and sockmap
from the kernel directory to net/bpf.

This ensures that these tracepoints are controlled by the CONFIG_NET,
avoiding unnecessary function definitions when the CONFIG_NET is disabled.
Additionally, it prevents build failures caused by the use of net module
functions when CONFIG_NET is not enabled.

Signed-off-by: Jiayuan Chen <[email protected]>
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Upstream branch: 224ee86
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=953164
version: 3

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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=952401 irrelevant now. Closing PR.

@kernel-patches-daemon-bpf kernel-patches-daemon-bpf bot deleted the series/951492=>bpf-next branch April 28, 2025 16:57
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