linux.git/kernel/trace/trace_dynevent.c, branch v5.4-rc2 Linux kernel source tree tracing/dynevent: Pass extra arguments to match operation 2019-08-31T16:19:38+00:00 Masami Hiramatsu mhiramat@kernel.org 2019-06-19T15:07:39+00:00 30199137c899d7e416a2adc58bf09bec217ce9ca Pass extra arguments to match operation for checking exact match. If the event doesn't support exact match, it will be ignored. Link: http://lkml.kernel.org/r/156095685930.28024.10405547027475590975.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> 
Pass extra arguments to match operation for checking
exact match. If the event doesn't support exact match,
it will be ignored.

Link: http://lkml.kernel.org/r/156095685930.28024.10405547027475590975.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
tracing/dynevent: Delete all matched events 2019-08-31T16:19:38+00:00 Masami Hiramatsu mhiramat@kernel.org 2019-06-19T15:07:29+00:00 cb8e7a8d55e052fdcfd1a567305a9a180fb61c57 When user gives an event name to delete, delete all matched events instead of the first one. This means if there are several events which have same name but different group (subsystem) name, those are removed if user passed only the event name, e.g. # cat kprobe_events p:group1/testevent _do_fork p:group2/testevent fork_idle # echo -:testevent >> kprobe_events # cat kprobe_events # Link: http://lkml.kernel.org/r/156095684958.28024.16597826267117453638.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> 
When user gives an event name to delete, delete all
matched events instead of the first one.

This means if there are several events which have same
name but different group (subsystem) name, those are
removed if user passed only the event name, e.g.

  # cat kprobe_events
  p:group1/testevent _do_fork
  p:group2/testevent fork_idle
  # echo -:testevent >> kprobe_events
  # cat kprobe_events
  #

Link: http://lkml.kernel.org/r/156095684958.28024.16597826267117453638.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
tracing: initialize variable in create_dyn_event() 2019-03-26T12:35:36+00:00 Frank Rowand frank.rowand@sony.com 2019-03-22T06:58:20+00:00 3dee10da2e9ff220e054a8f158cc296c797fbe81 Fix compile warning in create_dyn_event(): 'ret' may be used uninitialized in this function [-Wuninitialized]. Link: http://lkml.kernel.org/r/1553237900-8555-1-git-send-email-frowand.list@gmail.com Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Tom Zanussi <tom.zanussi@linux.intel.com> Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: stable@vger.kernel.org Fixes: 5448d44c3855 ("tracing: Add unified dynamic event framework") Signed-off-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> 
Fix compile warning in create_dyn_event(): 'ret' may be used uninitialized
in this function [-Wuninitialized].

Link: http://lkml.kernel.org/r/1553237900-8555-1-git-send-email-frowand.list@gmail.com

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
Fixes: 5448d44c3855 ("tracing: Add unified dynamic event framework")
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
tracing: Add generic event-name based remove event method 2018-12-10T17:22:44+00:00 Masami Hiramatsu mhiramat@kernel.org 2018-11-05T09:04:57+00:00 1ce25e9f6fff7633955e8ce776e5e9d7a780d34b Add a generic method to remove event from dynamic event list. This is same as other system under ftrace. You just need to pass the event name with '!', e.g. # echo p:new_grp/new_event _do_fork > dynamic_events This creates an event, and # echo '!p:new_grp/new_event _do_fork' > dynamic_events Or, # echo '!p:new_grp/new_event' > dynamic_events will remove new_grp/new_event event. Note that this doesn't check the event prefix (e.g. "p:") strictly, because the "group/event" name must be unique. Link: http://lkml.kernel.org/r/154140869774.17322.8887303560398645347.stgit@devbox Reviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com> Tested-by: Tom Zanussi <tom.zanussi@linux.intel.com> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> 
Add a generic method to remove event from dynamic event
list. This is same as other system under ftrace. You
just need to pass the event name with '!', e.g.

  # echo p:new_grp/new_event _do_fork > dynamic_events

This creates an event, and

  # echo '!p:new_grp/new_event _do_fork' > dynamic_events

Or,

  # echo '!p:new_grp/new_event' > dynamic_events

will remove new_grp/new_event event.

Note that this doesn't check the event prefix (e.g. "p:")
strictly, because the "group/event" name must be unique.

Link: http://lkml.kernel.org/r/154140869774.17322.8887303560398645347.stgit@devbox

Reviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Tested-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
tracing: Add unified dynamic event framework 2018-12-09T01:54:09+00:00 Masami Hiramatsu mhiramat@kernel.org 2018-11-05T09:02:08+00:00 5448d44c38557fc15d1c53b608a9c9f0e1ca8f86 Add unified dynamic event framework for ftrace kprobes, uprobes and synthetic events. Those dynamic events can be co-exist on same file because those syntax doesn't overlap. This introduces a framework part which provides a unified tracefs interface and operations. Link: http://lkml.kernel.org/r/154140852824.17322.12250362185969352095.stgit@devbox Reviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com> Tested-by: Tom Zanussi <tom.zanussi@linux.intel.com> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> 
Add unified dynamic event framework for ftrace kprobes, uprobes
and synthetic events. Those dynamic events can be co-exist on
same file because those syntax doesn't overlap.

This introduces a framework part which provides a unified tracefs
interface and operations.

Link: http://lkml.kernel.org/r/154140852824.17322.12250362185969352095.stgit@devbox

Reviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Tested-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>