Steven Rostedt (VMware) 634684d797 ftrace: Handle commands when closing set_ftrace_filter file ... commit 8c9af478c06bb1ab1422f90d8ecbc53defd44bc3 upstream. # echo switch_mm:traceoff > /sys/kernel/tracing/set_ftrace_filter will cause switch_mm to stop tracing by the traceoff command. # echo -n switch_mm:traceoff > /sys/kernel/tracing/set_ftrace_filter does nothing. The reason is that the parsing in the write function only processes commands if it finished parsing (there is white space written after the command). That's to handle: write(fd, "switch_mm:", 10); write(fd, "traceoff", 8); cases, where the command is broken over multiple writes. The problem is if the file descriptor is closed, then the write call is not processed, and the command needs to be processed in the release code. The release code can handle matching of functions, but does not handle commands. Cc: stable@vger.kernel.org Fixes: eda1e32855 ("tracing: handle broken names in ftrace filter") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-05-11 14:47:12 +02:00
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blktrace.c
bpf_trace.c	bpf: Unbreak BPF_PROG_TYPE_KPROBE when kprobe is called via do_int3	2021-02-17 11:02:25 +01:00
bpf_trace.h
fgraph.c
ftrace_internal.h
ftrace.c	ftrace: Handle commands when closing set_ftrace_filter file	2021-05-11 14:47:12 +02:00
Kconfig
kprobe_event_gen_test.c
Makefile
power-traces.c
preemptirq_delay_test.c
ring_buffer_benchmark.c
ring_buffer.c	ring-buffer: Force before_stamp and write_stamp to be different on discard	2021-03-09 11:11:12 +01:00
rpm-traces.c
synth_event_gen_test.c
trace_benchmark.c
trace_benchmark.h
trace_boot.c
trace_branch.c
trace_clock.c
trace_dynevent.c
trace_dynevent.h
trace_entries.h
trace_event_perf.c
trace_events_filter_test.h
trace_events_filter.c
trace_events_hist.c
trace_events_inject.c
trace_events_synth.c
trace_events_trigger.c
trace_events.c	tracing: Do not count ftrace events in top level enable output	2021-02-17 11:02:20 +01:00
trace_export.c
trace_functions_graph.c
trace_functions.c
trace_hwlat.c
trace_irqsoff.c	tracing: Use pause-on-trace with the latency tracers	2021-02-10 09:29:16 +01:00
trace_kdb.c
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_kprobe.c
trace_mmiotrace.c
trace_nop.c
trace_output.c
trace_output.h
trace_preemptirq.c
trace_printk.c
trace_probe_tmpl.h
trace_probe.c
trace_probe.h
trace_sched_switch.c
trace_sched_wakeup.c
trace_selftest_dynamic.c
trace_selftest.c
trace_seq.c
trace_stack.c
trace_stat.c
trace_stat.h
trace_synth.h
trace_syscalls.c
trace_uprobe.c
trace.c	tracing: Fix stack trace event size	2021-04-07 15:00:10 +02:00
trace.h
tracing_map.c
tracing_map.h