On 12/17, Neil Horman wrote: > > On Mon, Dec 17, 2012 at 05:04:08PM +0100, Oleg Nesterov wrote: > > > > > Is there a way to switch all namespaces, except for the pid > > > namespace? > > > > Which exactly namespaces you want to change? > > > Ideally, I want the pipe reader process to execute in the same namespaces that > the crashing process executed in (i.e. the pipe reader should execute as > though > the crashing process forked it).
Yes, and we probably want to change pid_ns as well. But afaics currently this is not possible, even setns can't do this. I am starting to think that in this case, perhaps, do_coredump() should not use call_usermode_helper() at all. Perhaps we can do clone(CLONE_VM) + commit_creds/restore_root/etc + kernel_execve. > > To be honest, I do not understand this patch at all. It seems that > > you need to do something like sys_setns(). But if we do this, then > > why we can't make core_pattern per-namespace? > > > That actually would make sense, although we can't really use setns directly, > as > I don't think we want to open file descriptors to do this manipulation in the > kernel. Yes, yes, sure. But this is solveable. We do not really need to open the files in /proc, we could use proc_ns_operations->install() directly. Although this is not pretty. > Perhaps its best just to restrict this patch to adjusting the root fs location > for the chroot case. Probably... at least for the start. BTW. Of course this is subjective, but personally I think that "||" looks strange. Perhaps it would be better to add something like --croot argument? Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/