bpf, sockmap: Introduce tracing capability for sockmap #12
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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
'''
Reviewed-by: Cong Wang <[email protected]>
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]>
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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Sockmap has the same high-performance forwarding capability as XDP, but operates at Layer 7.
Introduce tracing capability for sockmap, similar to XDP, 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 BPF programs, especially in production environments.
Additionally, a header file was added to bpf_trace.h to automatically generate tracepoints.
Test results:
$ echo "1" > /sys/kernel/tracing/events/sockmap/enable
skb:
sockmap_redirect: sk=00000000d3266a8d, type=skb, family=2, protocol=6, \ prog_id=73, length=256, action=PASS
msg:
sockmap_redirect: sk=00000000528c7614, type=msg, family=2, protocol=6, \ prog_id=185, length=5, action=REDIRECT
tls:
sockmap_redirect: sk=00000000d04d2224, type=skb, family=2, protocol=6, \ prog_id=143, length=35, action=PASS
strparser:
sockmap_skb_strp_parse: sk=00000000ecab0b30, family=2, protocol=6, \ prog_id=170, size=5