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Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root [message #47441 is a reply to message #47440]

Fri, 10 August 2012 18:37

Alan Cox
Messages: 48
Registered: May 2006

Member

> > AF_UNIX between roots raises some interesting semantic questions when
> > you begin passing file descriptors down them as well.
>
> Why is that? A file descriptor carries all that information with it...

Things like fchdir(). It's not a machine breaking problem but for
containers as opposed to chroot we need to be clear what the expected
isolation sematics are.

Agreed on open() for sockets.. the lack of open is a Berklix derived
pecularity of the interface. It would equally be useful to be able to
open "/dev/socket/ipv4/1.2.3.4/1135" and the like for scripts and stuff

That needs VFS changes however so you can pass the remainder of a path to
a device node. It also lets you do a lot of other sane stuff like

open /dev/ttyS0/9600/8n1

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[Message index]

		[RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: Stanislav Kinsbursky on Fri, 10 August 2012 12:57
		[RFC PATCH 2/2] SUNRPC: connect local transports with unix_stream_connect_root() helper By: Stanislav Kinsbursky on Fri, 10 August 2012 12:57
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: hpa on Fri, 10 August 2012 18:15
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: Alan Cox on Fri, 10 August 2012 18:23
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: hpa on Fri, 10 August 2012 18:31
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: Alan Cox on Fri, 10 August 2012 18:37
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: hpa on Fri, 10 August 2012 18:42
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: bfields on Fri, 10 August 2012 19:11
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: Alan Cox on Fri, 10 August 2012 19:24
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: hpa on Fri, 10 August 2012 23:09
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: Pavel Emelyanov on Sat, 11 August 2012 06:23
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: Stanislav Kinsbursky on Sat, 11 August 2012 11:15
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: bfields on Mon, 13 August 2012 16:47
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: Stanislav Kinsbursky on Mon, 13 August 2012 17:39
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: bfields on Mon, 13 August 2012 18:24
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: Stanislav Kinsbursky on Tue, 14 August 2012 08:46
		Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root By: Stanislav Kinsbursky on Fri, 10 August 2012 18:50

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