[v1] security: add trace event for cap_capable

[Steven Rostedt]

On Thu, 24 Oct 2024 03:40:12 -0700
Jordan Rome <linux at jordanrome.com> wrote:

> +TRACE_EVENT(capable,
> +
> +	TP_PROTO(const struct cred *cred, struct user_namespace *targ_ns,
> +		struct user_namespace *capable_ns, int cap, unsigned int opts, int ret),
> +
> +	TP_ARGS(cred, targ_ns, capable_ns, cap, opts, ret),
> +
> +	TP_STRUCT__entry(
> +		__field(const struct cred *, cred)
> +		__field(struct user_namespace *, targ_ns)
> +		__field(struct user_namespace *, capable_ns)
> +		__field(int, cap)
> +		__field(unsigned int, opts)
> +		__field(int, ret)
> +	),
> +
> +	TP_fast_assign(
> +		__entry->cred       = cred;
> +		__entry->targ_ns    = targ_ns;
> +		__entry->capable_ns = capable_ns;
> +		__entry->cap        = cap;
> +		__entry->opts       = opts;
> +		__entry->ret        = ret;
> +	),
> +
> +	TP_printk("cap %d, opts %u, ret %d",
> +		__entry->cap, __entry->opts, __entry->ret)
> +);
> +

You record cred, targ_ns and capable_ns but don't use it in TP_printk?

It's fine to print pointers there. Is there a reason you do not?

-- Steve