mbox series

[0/9] use canonical ftrace path whenever possible

Message ID 20230130181915.1113313-1-zwisler@google.com
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Series use canonical ftrace path whenever possible | expand

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Ross Zwisler Jan. 30, 2023, 6:19 p.m. UTC 
The canonical location for the tracefs filesystem is at /sys/kernel/tracing.

But, from Documentation/trace/ftrace.rst:

  Before 4.1, all ftrace tracing control files were within the debugfs
  file system, which is typically located at /sys/kernel/debug/tracing.
  For backward compatibility, when mounting the debugfs file system,
  the tracefs file system will be automatically mounted at:

  /sys/kernel/debug/tracing

There are many places where this older debugfs path is still used in
code comments, selftests, examples and tools, so let's update them to
avoid confusion.

I've broken up the series as best I could by maintainer or directory,
and I've only sent people the patches that I think they care about to
avoid spamming everyone.

Ross Zwisler (9):
  tracing: always use canonical ftrace path
  bpf: use canonical ftrace path
  selftests/bpf: use canonical ftrace path
  perf docs: use canonical ftrace path
  tools/power: use canonical ftrace path
  selftests: use canonical ftrace path
  tools/virtio: use canonical ftrace path
  leaking_addresses: also skip canonical ftrace path
  tools/kvm_stat: use canonical ftrace path

 include/linux/kernel.h                        |  2 +-
 include/linux/tracepoint.h                    |  4 ++--
 include/uapi/linux/bpf.h                      |  8 ++++----
 kernel/trace/Kconfig                          | 20 +++++++++----------
 kernel/trace/kprobe_event_gen_test.c          |  2 +-
 kernel/trace/ring_buffer.c                    |  2 +-
 kernel/trace/synth_event_gen_test.c           |  2 +-
 kernel/trace/trace.c                          |  2 +-
 samples/bpf/cpustat_kern.c                    |  4 ++--
 samples/bpf/hbm.c                             |  4 ++--
 samples/bpf/ibumad_kern.c                     |  4 ++--
 samples/bpf/lwt_len_hist.sh                   |  2 +-
 samples/bpf/offwaketime_kern.c                |  2 +-
 samples/bpf/task_fd_query_user.c              |  4 ++--
 samples/bpf/test_lwt_bpf.sh                   |  2 +-
 samples/bpf/test_overhead_tp_kern.c           |  4 ++--
 samples/user_events/example.c                 |  4 ++--
 scripts/leaking_addresses.pl                  |  1 +
 scripts/tracing/draw_functrace.py             |  6 +++---
 scripts/tracing/ftrace-bisect.sh              |  4 ++--
 tools/include/uapi/linux/bpf.h                |  8 ++++----
 tools/kvm/kvm_stat/kvm_stat                   |  2 +-
 tools/lib/api/fs/tracing_path.c               |  4 ++--
 tools/lib/traceevent/event-parse.c            |  8 ++++----
 tools/perf/Documentation/perf-list.txt        |  2 +-
 tools/perf/Documentation/perf-script-perl.txt |  2 +-
 .../perf/Documentation/perf-script-python.txt |  4 ++--
 tools/power/pm-graph/sleepgraph.py            |  4 ++--
 .../x86/amd_pstate_tracer/amd_pstate_trace.py |  4 ++--
 .../intel_pstate_tracer.py                    | 10 +++++-----
 .../selftests/bpf/get_cgroup_id_user.c        |  2 +-
 .../bpf/prog_tests/kprobe_multi_test.c        |  2 +-
 .../bpf/prog_tests/task_fd_query_tp.c         |  2 +-
 .../bpf/prog_tests/tp_attach_query.c          |  2 +-
 .../selftests/bpf/prog_tests/trace_printk.c   |  2 +-
 .../selftests/bpf/prog_tests/trace_vprintk.c  |  2 +-
 .../selftests/bpf/progs/test_stacktrace_map.c |  2 +-
 .../selftests/bpf/progs/test_tracepoint.c     |  2 +-
 tools/testing/selftests/bpf/test_ftrace.sh    |  2 +-
 tools/testing/selftests/bpf/test_tunnel.sh    |  8 ++++----
 tools/testing/selftests/bpf/trace_helpers.c   |  4 ++--
 .../testing/selftests/user_events/dyn_test.c  |  2 +-
 .../selftests/user_events/ftrace_test.c       | 10 +++++-----
 .../testing/selftests/user_events/perf_test.c |  8 ++++----
 tools/testing/selftests/vm/protection_keys.c  |  4 ++--
 tools/tracing/latency/latency-collector.c     |  2 +-
 tools/virtio/virtio-trace/README              |  2 +-
 tools/virtio/virtio-trace/trace-agent.c       |  2 +-
 48 files changed, 96 insertions(+), 95 deletions(-)