tracing: Add show_event_triggers to expose active event triggers

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To audit active event triggers, userspace currently must traverse the
events/ directory and read each individual trigger file. This is
cumbersome for system-wide auditing or debugging.

Introduce "show_event_triggers" at the trace root directory. This file
displays all events that currently have one or more triggers applied,
alongside the trigger configuration, in a consolidated
system:event [tab] trigger format.

The implementation leverages the existing trace_event_file iterators
and uses the trigger's own print() operation to ensure output
consistency with the per-event trigger files.

Link: https://patch.msgid.link/20260105142939.2655342-3-atomlin@atomlin.com
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

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Aaron Tomlin 2026-01-05 09:29:39 -05:00 • committed by Steven Rostedt (Google)

parent 729757b96a

commit 6a80838814

2 changed files with 72 additions and 0 deletions

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8

Documentation/trace/ftrace.rst

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64

kernel/trace/trace_events.c

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