From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx> 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 v3: https://lore.kernel.org/linux-trace-devel/20210702031022.154146-1-rostedt@xxxxxxxxxxx/ - Silly me used "stat(KPROBE_EVENTS)" to see if the kprobe event file existed, but KPROBE_EVENTS is not a full path. Should have used tracefs_file_exists() since that's what it's made for. My testing missed this, because I forgot to push the changes to my test machine, and I tested the code with old logic. 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 | 349 +++++++++++++++++++++++++++ 5 files changed, 712 insertions(+) create mode 100644 Documentation/libtracefs-kprobes.txt create mode 100644 src/tracefs-kprobes.c -- 2.30.2
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