linux-kernel - Re: [PATCH RFC net-next v13 00/13] vsock: add namespace support to vhost-vsock and loopback

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Message-ID: <aWUnqbDlBmjfnC_Q@sgarzare-redhat>
Date: Mon, 12 Jan 2026 18:26:18 +0100
From: Stefano Garzarella <sgarzare@...hat.com>
To: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Bobby Eshleman <bobbyeshleman@...il.com>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, 
	Stefan Hajnoczi <stefanha@...hat.com>, Jason Wang <jasowang@...hat.com>, 
	Eugenio Pérez <eperezma@...hat.com>, Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, 
	"K. Y. Srinivasan" <kys@...rosoft.com>, Haiyang Zhang <haiyangz@...rosoft.com>, 
	Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>, 
	Bryan Tan <bryan-bt.tan@...adcom.com>, Vishnu Dasa <vishnu.dasa@...adcom.com>, 
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, Shuah Khan <shuah@...nel.org>, Long Li <longli@...rosoft.com>, 
	linux-kernel@...r.kernel.org, virtualization@...ts.linux.dev, netdev@...r.kernel.org, 
	kvm@...r.kernel.org, linux-hyperv@...r.kernel.org, linux-kselftest@...r.kernel.org, 
	berrange@...hat.com, Sargun Dhillon <sargun@...gun.me>, 
	Bobby Eshleman <bobbyeshleman@...a.com>
Subject: Re: [PATCH RFC net-next v13 00/13] vsock: add namespace support to
 vhost-vsock and loopback

On Sat, Jan 10, 2026 at 07:12:07PM -0500, Michael S. Tsirkin wrote:
>On Fri, Jan 09, 2026 at 04:11:12PM -0800, Bobby Eshleman wrote:
>> On Tue, Dec 23, 2025 at 04:28:34PM -0800, Bobby Eshleman wrote:
>> > This series adds namespace support to vhost-vsock and loopback. It does
>> > not add namespaces to any of the other guest transports (virtio-vsock,
>> > hyperv, or vmci).
>> >
>> > The current revision supports two modes: local and global. Local
>> > mode is complete isolation of namespaces, while global mode is complete
>> > sharing between namespaces of CIDs (the original behavior).
>> >
>> > The mode is set using the parent namespace's
>> > /proc/sys/net/vsock/child_ns_mode and inherited when a new namespace is
>> > created. The mode of the current namespace can be queried by reading
>> > /proc/sys/net/vsock/ns_mode. The mode can not change after the namespace
>> > has been created.
>> >
>> > Modes are per-netns. This allows a system to configure namespaces
>> > independently (some may share CIDs, others are completely isolated).
>> > This also supports future possible mixed use cases, where there may be
>> > namespaces in global mode spinning up VMs while there are mixed mode
>> > namespaces that provide services to the VMs, but are not allowed to
>> > allocate from the global CID pool (this mode is not implemented in this
>> > series).
>>
>> Stefano, would like me to resend this without the RFC tag, or should I
>> just leave as is for review? I don't have any planned changes at the
>> moment.
>>
>> Best,
>> Bobby
>
>i couldn't apply it on top of net-next so pls do.
>

Yeah, some difficulties to apply also here.
I tried `base-commit: 962ac5ca99a5c3e7469215bf47572440402dfd59` as 
mentioned in the cover, but didn't apply. After several tries I 
successfully applied on top of commit bc69ed975203 ("Merge tag 
'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost")

So, I agree, better to resend and you can remove RFC.

BTW I'll do my best to start to review tomorrow!

Thanks,
Stefano