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linux/kernel/trace
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Steven Rostedt (VMware) 7d5fda1c84 tracing: Fix event probe removal from dynamic events 
When an event probe is to be removed via the API that created it via the
dynamic events, an -ENOENT error is returned.

This is because the removal of the event probe does not expect to see the
event system and name that the event probe is attached to, even though
that's part of the API to create it. As the removal of probes is to use
the same API as they are created.

In fact, the removal is not consistent with the kprobes and uprobes
removal. Fix that by allowing various ways to remove the eprobe.

The eprobe is created with:

 e:[GROUP/]NAME SYSTEM/EVENT [OPTIONS]

Have it get removed by echoing in the following into dynamic_events:

 # Remove all eprobes with NAME
 echo '-:NAME' >> dynamic_events

 # Remove a specific eprobe
 echo '-:GROUP/NAME' >> dynamic_events
 echo '-:GROUP/NAME SYSTEM/EVENT' >> dynamic_events
 echo '-:NAME SYSTEM/EVENT' >> dynamic_events
 echo '-:GROUP/NAME SYSTEM/EVENT OPTIONS' >> dynamic_events
 echo '-:NAME SYSTEM/EVENT OPTIONS' >> dynamic_events

Link: https://lkml.kernel.org/r/20211012081925.0e19cc4f@gandalf.local.home
Link: https://lkml.kernel.org/r/20211013205533.630722129@goodmis.org

Suggested-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Fixes: 7491e2c442 ("tracing: Add a probe that attaches to trace events")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2021-10-13 19:26:57 -04:00
..
blktrace.c blktrace: Fix uaf in blk_trace access after removing by sysfs 2021-09-24 11:06:15 -06:00
bpf_trace.c bpf: Fix bpf-next builds without CONFIG_BPF_EVENTS 2021-08-25 19:41:39 -07:00
bpf_trace.h bpf: Use dedicated bpf_trace_printk event instead of trace_printk() 2020-07-13 16:55:49 -07:00
error_report-traces.c tracing: add error_report_end trace point 2021-02-26 09:41:02 -08:00
fgraph.c tracing: Fix various typos in comments 2021-03-23 14:08:18 -04:00
ftrace_internal.h
ftrace.c ftrace: Introduce ftrace_need_init_nop() 2021-08-03 14:31:40 +02:00
Kconfig tracing: Simplify the Kconfig dependency of FTRACE 2021-08-16 11:37:20 -04:00
kprobe_event_gen_test.c
Makefile tracing: Add a probe that attaches to trace events 2021-08-20 14:18:40 -04:00
power-traces.c
preemptirq_delay_test.c kernel: trace: preemptirq_delay_test: add cpu affinity 2021-02-02 17:02:07 -05:00
ring_buffer_benchmark.c sched,tracing: Convert to sched_set_fifo() 2020-07-29 11:43:53 +02:00
ring_buffer.c tracing: Replace deprecated CPU-hotplug functions. 2021-08-17 15:47:14 -04:00
rpm-traces.c
synth_event_gen_test.c tracing: Fix various typos in comments 2021-03-23 14:08:18 -04:00
trace_benchmark.c tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00
trace_benchmark.h
trace_boot.c bootconfig: Rename xbc_node_find_child() to xbc_node_find_subkey() 2021-09-09 19:14:33 -04:00
trace_branch.c tracing: Merge irqflags + preempt counter. 2021-02-02 17:02:06 -05:00
trace_clock.c tracing: Do no increment trace_clock_global() by one 2021-06-18 09:10:00 -04:00
trace_dynevent.c tracing: Have dynamic events have a ref counter 2021-08-18 18:13:47 -04:00
trace_dynevent.h tracing: Add DYNAMIC flag for dynamic events 2021-08-18 18:10:32 -04:00
trace_entries.h trace: Add timerlat tracer 2021-06-25 19:57:24 -04:00
trace_eprobe.c tracing: Fix event probe removal from dynamic events 2021-10-13 19:26:57 -04:00
trace_event_perf.c tracing: Have dynamic events have a ref counter 2021-08-18 18:13:47 -04:00
trace_events_filter_test.h
trace_events_filter.c tracing: Update create_system_filter() kernel-doc comment 2021-03-25 16:04:35 -04:00
trace_events_hist.c tracing: Fix missing * in comment block 2021-10-10 22:27:40 -04:00
trace_events_inject.c tracing: Merge irqflags + preempt counter. 2021-02-02 17:02:06 -05:00
trace_events_synth.c tracing: Have dynamic events have a ref counter 2021-08-18 18:13:47 -04:00
trace_events_trigger.c tracing: Add a probe that attaches to trace events 2021-08-20 14:18:40 -04:00
trace_events.c tracing: Add migrate-disabled counter to tracing output. 2021-09-03 19:42:35 -04:00
trace_export.c tracing: Fix some typos in comments 2020-11-10 20:39:40 -05:00
trace_functions_graph.c tracing: Fix various typos in comments 2021-03-23 14:08:18 -04:00
trace_functions.c tracing: Add "func_no_repeats" option for function tracing 2021-04-15 14:50:02 -04:00
trace_hwlat.c tracing: Replace deprecated CPU-hotplug functions. 2021-08-17 15:47:14 -04:00
trace_irqsoff.c tracing: Merge irqflags + preempt counter. 2021-02-02 17:02:06 -05:00
trace_kdb.c kdb: Rename members of struct kdbtab_t 2021-07-27 17:05:06 +01:00
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_kprobe.c tracing: Add a probe that attaches to trace events 2021-08-20 14:18:40 -04:00
trace_mmiotrace.c tracing: Remove definition of DEBUG in trace_mmiotrace.c 2021-02-02 17:02:07 -05:00
trace_nop.c
trace_osnoise.c tracing/osnoise: Fix missed cpus_read_unlock() in start_per_cpu_kthreads() 2021-09-08 15:10:24 -04:00
trace_output.c tracing: Add migrate-disabled counter to tracing output. 2021-09-03 19:42:35 -04:00
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 tracing: Add a verifier to check string pointers for trace events 2021-03-18 12:58:27 -04:00
trace_probe_tmpl.h tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs 2021-08-19 09:09:03 -04:00
trace_probe.c tracing: Add a probe that attaches to trace events 2021-08-20 14:18:40 -04:00
trace_probe.h tracing: Add a probe that attaches to trace events 2021-08-20 14:18:40 -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
trace_sched_wakeup.c tracing: Change variable type as bool for clean-up 2021-06-30 09:19:14 -04:00
trace_selftest_dynamic.c
trace_selftest.c tracing: Fix various typos in comments 2021-03-23 14:08:18 -04:00
trace_seq.c tracing: Fix various typos in comments 2021-03-23 14:08:18 -04:00
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
trace_synth.h tracing: synth events: increase max fields count 2021-09-08 15:29:16 -04:00
trace_syscalls.c tracing: Merge irqflags + preempt counter. 2021-02-02 17:02:06 -05:00
trace_uprobe.c tracing/probes: Reject events which have the same name of existing one 2021-08-19 09:15:19 -04:00
trace.c tracing: Fix missing osnoise tracer on max_latency 2021-10-07 09:41:47 -04:00
trace.h tracing: Add a probe that attaches to trace events 2021-08-20 14:18:40 -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