Re: [RFC] shmgetfd idea

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On 01/27/2014 05:37 PM, John Stultz wrote:
> 
> In the Android case, its important to have this interface to atomically
> provide these unlinked tmpfs fds, because they'd like to avoid having
> tmpfs mounts that are writable by applications (since that creates a
> potential DOS on the system by applications writing random files that
> persist after the process has been killed). It also provides better
> life-cycle management for resources, since as the fds never have named
> links in the filesystem, their resources are automatically cleaned up
> when the last process with the fd dies, and there's no potential races
> between create and unlink with processes being terminated, which avoids
> the need for cleanup management.
> 

What about if tmpfs could be restricted to only only O_TMPFILE open()s?
 This pretty much amounts to an option to prevent tmpfs from creating
new directory entries.

	-hpa

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