[PATCH v3 0/7] libtracefs: Facilitate adding and removing kprobes

[Steven Rostedt <rostedt@goodmis.org>]

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

Add a tracefs_kprobe_raw() to facilitate adding kprobe events. It's
denoted as "raw" because it still requires knowing the complex format of
a kprobe, but at least it helps with other formats:

 p:[[system/]event] addr fmt

The user only needs to know the "fmt" part above, and not worry about
what file to open, or how to open it.

Also add a tracefs_kprobe_clear() to clear all kprobes and a
tracefs_kprobe_clear_probe() to clear an individual kprobe. Both have a
"force" parameter, that if set, will then try to disable the kprobe in
all instances (including the top) and then remove the kprobe(s).

Changes since v2: https://lore.kernel.org/linux-trace-devel/20210630154729.129873-1-rostedt@goodmis.org/

 - Added helper function tracefs_get_kprobes() that return a list of
   kprobe events, that the clear functions can now use, and simplify
   their code.

 - Rename tracefs_kprobe_clear to tracefs_kprobe_clear_all()

 - Have tracefs_kprobe_clear_probe() take a NULL for the event
   to remove all kprobes for a given system.

 - Added man pages.

Steven Rostedt (VMware) (7):
  libtracefs: Implement tracefs_instances()
  libtracefs: Implement tracefs_kprobe_raw()
  libtracefs: Implement tracefs_kretprobe_raw()
  libtracefs: Implement tracefs_get_kprobes()
  libtracefs: Implement tracefs_kprobe_clear_all() to remove all kprobes
  libtracefs: Implement tracefs_kprobe_clear_probe()
  libtracefs: Add man pages for kprobe functions

 Documentation/libtracefs-kprobes.txt | 275 +++++++++++++++++++++
 include/tracefs.h                    |   9 +
 src/Makefile                         |   1 +
 src/tracefs-instance.c               |  78 ++++++
 src/tracefs-kprobes.c                | 351 +++++++++++++++++++++++++++
 5 files changed, 714 insertions(+)
 create mode 100644 Documentation/libtracefs-kprobes.txt
 create mode 100644 src/tracefs-kprobes.c

-- 
2.30.2