Messages in this thread | | | Date | Thu, 22 Jan 2015 04:23:30 +0000 | From | Al Viro <> | Subject | Re: [RFC][PATCH 0/5] tracing: Add new file system tracefs |
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On Thu, Jan 22, 2015 at 07:00:07AM +0800, Greg Kroah-Hartman wrote: > On Wed, Jan 21, 2015 at 12:19:53PM -0500, Steven Rostedt wrote: > > > > There has been complaints that tracing is tied too much to debugfs, > > as there are systems that would like to perform tracing, but do > > not mount debugfs for security reasons. That is because any subsystem > > may use debugfs for debugging, and these interfaces are not always > > tested for security. > > > > Creating a new tracefs that the tracing directory will now be attached > > to allows system admins the ability to access the tracing directory > > without the need to mount debugfs. > > Yeah! > > Any chance you can use kernfs as your "basis" for this filesystem > instead of having to roll all of your own functions? I'm slowly working > on moving debugfs to it, and it should save a lot of code there, as well > as fixing some "problems" we have in debugfs file lifetimes when things > are removed from the system.
I would recommend against that - kernfs is overburdened by their need to accomodate cgroup weirdness. IMO it's not a good model for anything, other than an anti-hard-drugs poster ("don't shoot that shit, or you might end up hallucinating _this_").
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