linux/kernel/trace/trace_boot.c, branch v5.6

tracing: Change trace_boot to use synth_event interface

2020-01-31T17:59:26Z

Have trace_boot_add_synth_event() use the synth_event interface. Also, rename synth_event_run_cmd() to synth_event_run_command() now that trace_boot's version is gone. Link: http://lkml.kernel.org/r/94f1fa0e31846d0bddca916b8663404b20559e34.1580323897.git.zanussi@kernel.org Acked-by: Masami Hiramatsu Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt (VMware)

tracing: Change trace_boot to use kprobe_event interface

2020-01-30T14:46:28Z

Have trace_boot_add_kprobe_event() use the kprobe_event interface. Also, rename kprobe_event_run_cmd() to kprobe_event_run_command() now that trace_boot's version is gone. Link: http://lkml.kernel.org/r/af5429d11291ab1e9a85a0ff944af3b2bcf193c7.1580323897.git.zanussi@kernel.org Acked-by: Masami Hiramatsu Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt (VMware)

tracing/boot: Move external function declarations to kernel/trace/trace.h

2020-01-29T13:49:04Z

Move external function declarations into kernel/trace/trace.h from trace_boot.c for tracing subsystem internal use. Link: http://lkml.kernel.org/r/158029060405.12381.11944554430359702545.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

tracing/boot: Include required headers and sort it alphabetically

2020-01-29T13:48:44Z

Include some required (but currently indirectly included) headers and sort it alphabetically. Link: http://lkml.kernel.org/r/158029059514.12381.6597832266860248781.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

tracing: Decrement trace_array when bootconfig creates an instance

2020-01-25T02:29:13Z

The trace_array_get_by_name() creates a ftrace instance and trace_array_put() is used to remove the reference. Even though the trace_array_get_by_name() creates the instance, it also adds a reference count to it, that prevents user space from removing it. As the bootconfig just creates the instance on boot up, it should still be used where it can be deleted by user space after boot. A trace_array_put() is required to let that happen. Also, change the documentation on trace_array_get_by_name() to make this not be so confusing. Link: https://lore.kernel.org/r/20200124205927.76128804@rorschach.local.home Fixes: 4f712a4d04a4e ("tracing/boot: Add instance node support") Acked-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

tracing/boot: Fix an IS_ERR() vs NULL bug

2020-01-21T23:41:39Z

The trace_array_get_by_name() function doesn't return error pointers, it returns NULL on error. Link: http://lkml.kernel.org/r/20200117053007.5h2juv272pokqhtq@kili.mountain Fixes: 4f712a4d04a4 ("tracing/boot: Add instance node support") Acked-by: Masami Hiramatsu Signed-off-by: Dan Carpenter Signed-off-by: Steven Rostedt (VMware)

tracing/boot: Add function tracer filter options

2020-01-13T18:19:42Z

Add below function-tracer filter options to boot-time tracing. - ftrace.[instance.INSTANCE.]ftrace.filters This will take an array of tracing function filter rules - ftrace.[instance.INSTANCE.]ftrace.notraces This will take an array of NON-tracing function filter rules Link: http://lkml.kernel.org/r/157867244841.17873.10933616628243103561.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

tracing/boot: Add cpu_mask option support

2020-01-13T18:19:42Z

Add ftrace.cpumask option support to boot-time tracing. This sets cpumask for each instance. - ftrace.[instance.INSTANCE.]cpumask = CPUMASK; Set the trace cpumask. Note that the CPUMASK should be a string which /tracing_cpumask can accepts. Link: http://lkml.kernel.org/r/157867243625.17873.13613922641273149372.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

tracing/boot: Add instance node support

2020-01-13T18:19:42Z

Add instance node support to boot-time tracing. User can set some options and event nodes under instance node. - ftrace.instance.INSTANCE[...] Add new INSTANCE instance. Some options and event nodes are acceptable for instance node. Link: http://lkml.kernel.org/r/157867242413.17873.9814204526141500278.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

tracing/boot: Add synthetic event support

2020-01-13T18:19:42Z

Add synthetic event node support to boot time tracing. The synthetic event is a kind of event node, but the group name is "synthetic". - ftrace.event.synthetic.EVENT.fields = FIELD[, FIELD2...] Defines new synthetic event with FIELDs. Each field should be "type varname". The synthetic node requires "fields" string arraies, which defines the fields as same as tracing/synth_events interface. Link: http://lkml.kernel.org/r/157867241236.17873.12411615143321557709.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)