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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/kernel/trace
История
Steven Rostedt (VMware) 256cfdd6fd tracing: Do not count ftrace events in top level enable output 
The file /sys/kernel/tracing/events/enable is used to enable all events by
echoing in "1", or disabling all events when echoing in "0". To know if all
events are enabled, disabled, or some are enabled but not all of them,
cating the file should show either "1" (all enabled), "0" (all disabled), or
"X" (some enabled but not all of them). This works the same as the "enable"
files in the individule system directories (like tracing/events/sched/enable).

But when all events are enabled, the top level "enable" file shows "X". The
reason is that its checking the "ftrace" events, which are special events
that only exist for their format files. These include the format for the
function tracer events, that are enabled when the function tracer is
enabled, but not by the "enable" file. The check includes these events,
which will always be disabled, and even though all true events are enabled,
the top level "enable" file will show "X" instead of "1".

To fix this, have the check test the event's flags to see if it has the
"IGNORE_ENABLE" flag set, and if so, not test it.

Cc: stable@vger.kernel.org
Fixes: 553552ce17 ("tracing: Combine event filter_active and enable into single flags field")
Reported-by: "Yordan Karadzhov (VMware)" <y.karadz@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
 		2021-02-05 15:40:04 -05:00
..
Kconfig tracing/kprobes: Do the notrace functions check without kprobes on ftrace 2021-01-11 16:09:53 -05:00
Makefile ftrace: Add recording of functions that caused recursion 2020-11-06 08:42:26 -05:00
blktrace.c Tracing updates for 5.11 2020-12-17 13:22:17 -08:00
bpf_trace.c Tracing updates for 5.11 2020-12-17 13:22:17 -08:00
bpf_trace.h bpf: Use dedicated bpf_trace_printk event instead of trace_printk() 2020-07-13 16:55:49 -07:00
fgraph.c fgraph: Initialize tracing_graph_pause at task creation 2021-01-29 15:07:32 -05:00
ftrace.c Tracing updates for 5.11 2020-12-17 13:22:17 -08:00
ftrace_internal.h x86/ftrace: Have ftrace trampolines turn read-only at the end of system boot up 2020-05-12 18:24:34 -04:00
kprobe_event_gen_test.c tracing: Add kprobe event command generation test module 2020-01-30 09:46:28 -05:00
power-traces.c
…
preemptirq_delay_test.c tracing: Wait for preempt irq delay thread to execute 2020-05-11 17:00:34 -04:00
ring_buffer.c Tracing updates for 5.11 2020-12-17 13:22:17 -08:00
ring_buffer_benchmark.c sched,tracing: Convert to sched_set_fifo() 2020-07-29 11:43:53 +02:00
rpm-traces.c
…
synth_event_gen_test.c tracing: Remove the useless value assignment in test_create_synth_event() 2020-11-13 12:19:52 -05:00
trace.c Tracing updates for 5.11 2020-12-17 13:22:17 -08:00
trace.h tracing: Disable ftrace selftests when any tracer is running 2020-12-14 12:05:03 -05:00
trace_benchmark.c tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00
trace_benchmark.h tracing: Fix SPDX format headers to use C++ style comments 2018-08-16 19:08:06 -04:00
trace_boot.c tracing: Disable ftrace selftests when any tracer is running 2020-12-14 12:05:03 -05:00
trace_branch.c tracing: Make struct ring_buffer less ambiguous 2020-01-13 13:19:38 -05:00
trace_clock.c tracing: Add SPDX License format tags to tracing files 2018-08-16 19:08:06 -04:00
trace_dynevent.c tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00
trace_dynevent.h tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00
trace_entries.h tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00
trace_event_perf.c ftrace: Have the callbacks receive a struct ftrace_regs instead of pt_regs 2020-11-13 12:14:55 -05:00
trace_events.c tracing: Do not count ftrace events in top level enable output 2021-02-05 15:40:04 -05:00
trace_events_filter.c tracing: Clean up after filter logic rewriting 2020-11-16 12:32:34 -05:00
trace_events_filter_test.h tracing: Fix SPDX format headers to use C++ style comments 2018-08-16 19:08:06 -04:00
trace_events_hist.c tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00
trace_events_inject.c tracing: Initialize val to zero in parse_entry of inject code 2020-01-02 19:04:57 -05:00
trace_events_synth.c tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00
trace_events_trigger.c tracing: Fix event trigger to accept redundant spaces 2020-06-23 21:51:40 -04:00
trace_export.c tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00
trace_functions.c ftrace: Have the callbacks receive a struct ftrace_regs instead of pt_regs 2020-11-13 12:14:55 -05:00
trace_functions_graph.c fgraph: Make overruns 4 bytes in graph stack structure 2020-11-10 20:39:36 -05:00
trace_hwlat.c Tracing updates for 5.11 2020-12-17 13:22:17 -08:00
trace_irqsoff.c tracing: Use pause-on-trace with the latency tracers 2021-01-29 15:35:33 -05:00
trace_kdb.c tracing: Rename trace_buffer to array_buffer 2020-01-13 13:19:38 -05:00
trace_kprobe.c tracing/kprobe: Fix to support kretprobe events on unloaded modules 2021-01-29 15:39:48 -05:00
trace_kprobe_selftest.c selftest/ftrace: Move kprobe selftest function to separate compile unit 2018-07-30 18:41:04 -04:00
trace_kprobe_selftest.h tracing: Fix SPDX format headers to use C++ style comments 2018-08-16 19:08:06 -04:00
trace_mmiotrace.c tracing: Make struct ring_buffer less ambiguous 2020-01-13 13:19:38 -05:00
trace_nop.c
…
trace_output.c ftrace: Add recording of functions that caused recursion 2020-11-06 08:42:26 -05:00
trace_output.h ftrace: Add recording of functions that caused recursion 2020-11-06 08:42:26 -05:00
trace_preemptirq.c lockdep: fix order in trace_hardirqs_off_caller() 2020-09-14 10:08:07 +02:00
trace_printk.c Updates for tracing and bootconfig: 2020-10-15 15:51:28 -07:00
trace_probe.c tracing/probe: Fix memleak in fetch_op_data operations 2020-06-16 21:21:02 -04:00
trace_probe.h tracing: Move is_good_name() from trace_probe.h to trace.h 2020-10-15 12:01:13 -04:00
trace_probe_tmpl.h tracing/probe: Support user-space dereference 2019-05-25 23:04:42 -04:00
trace_recursion_record.c ftrace: Add recording of functions that caused recursion 2020-11-06 08:42:26 -05:00
trace_sched_switch.c tracing: Fix sched switch start/stop refcount racy updates 2020-01-30 09:46:10 -05:00
trace_sched_wakeup.c ftrace: Have the callbacks receive a struct ftrace_regs instead of pt_regs 2020-11-13 12:14:55 -05:00
trace_selftest.c tracing: Disable ftrace selftests when any tracer is running 2020-12-14 12:05:03 -05:00
trace_selftest_dynamic.c ftrace: Mark function tracer test functions noinline/noclone 2018-01-23 15:57:29 -05:00
trace_seq.c tracing: Remove unused TRACE_SEQ_BUF_USED 2020-01-21 18:39:54 -05:00
trace_stack.c ftrace: Have the callbacks receive a struct ftrace_regs instead of pt_regs 2020-11-13 12:14:55 -05:00
trace_stat.c tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer 2020-09-18 22:17:14 -04:00
trace_stat.h tracing: Use generic type for comparator function 2019-11-14 13:15:11 -05:00
trace_synth.h tracing: Add support for dynamic strings to synthetic events 2020-10-05 19:32:18 -04:00
trace_syscalls.c Tracing updates: 2020-02-06 07:12:11 +00:00
trace_uprobe.c tracing/uprobes: Support perf-style return probe 2020-09-21 21:06:03 -04:00
tracing_map.c tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00
tracing_map.h tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00