Re: RFC [patch 13/34] PID Virtualization Define new task_pid api

[Greg <gkurz@fr.ibm.com>]

Eric W. Biederman wrote:
> 
> On this front I have been planning on using sys_clone as it allows
> pieces of the virtualization to be incrementally built, it already
> supports the FS namespace, and it supports flexibly specifying what
> you want to contain.
> 

What would you do to handle the following case:

pid = getpid();
if (sys_clone(CLONE_CONTAINER) == 0) {
	ppid = getppid();
	assert(ppid == pid);
}

Most of the calls involving resource ids will return values that aren't
*consistent* with ids already stored in userland... could possibly break some
piece of code. Perhaps a sys_exec() should also be enforced to reset the process
memory.

-Greg-
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