linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Andra Paraschiv <andraprs@amazon.com>
To: netdev <netdev@vger.kernel.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
	"David S . Miller" <davem@davemloft.net>,
	David Duncan <davdunc@amazon.com>,
	Dexuan Cui <decui@microsoft.com>, Alexander Graf <graf@amazon.de>,
	Jorgen Hansen <jhansen@vmware.com>,
	Jakub Kicinski <kuba@kernel.org>,
	Stefano Garzarella <sgarzare@redhat.com>,
	Stefan Hajnoczi <stefanha@redhat.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Andra Paraschiv <andraprs@amazon.com>
Subject: [PATCH net-next v2 0/4] vsock: Add flags field in the vsock address
Date: Fri, 4 Dec 2020 19:02:31 +0200	[thread overview]
Message-ID: <20201204170235.84387-1-andraprs@amazon.com> (raw)

vsock enables communication between virtual machines and the host they are
running on. Nested VMs can be setup to use vsock channels, as the multi
transport support has been available in the mainline since the v5.5 Linux kernel
has been released.

Implicitly, if no host->guest vsock transport is loaded, all the vsock packets
are forwarded to the host. This behavior can be used to setup communication
channels between sibling VMs that are running on the same host. One example can
be the vsock channels that can be established within AWS Nitro Enclaves
(see Documentation/virt/ne_overview.rst).

To be able to explicitly mark a connection as being used for a certain use case,
add a flags field in the vsock address data structure. The "svm_reserved1" field
has been repurposed to be the flags field. The value of the flags will then be
taken into consideration when the vsock transport is assigned. This way can
distinguish between different use cases, such as nested VMs / local communication
and sibling VMs.

Thank you.

Andra

---

Patch Series Changelog

The patch series is built on top of v5.10-rc6.

GitHub repo branch for the latest version of the patch series:

* https://github.com/andraprs/linux/tree/vsock-flag-sibling-comm-v2

v1 -> v2

* Update the vsock flag naming to "VMADDR_FLAG_TO_HOST".
* Use bitwise operators to setup and check the vsock flag.
* Set the vsock flag on the receive path in the vsock transport assignment
  logic.
* Merge the checks for the g2h transport assignment in one "if" block.
* v1: https://lore.kernel.org/lkml/20201201152505.19445-1-andraprs@amazon.com/

---

Andra Paraschiv (4):
  vm_sockets: Include flags field in the vsock address data structure
  vm_sockets: Add VMADDR_FLAG_TO_HOST vsock flag
  af_vsock: Set VMADDR_FLAG_TO_HOST flag on the receive path
  af_vsock: Assign the vsock transport considering the vsock address
    flags

 include/uapi/linux/vm_sockets.h | 17 ++++++++++++++++-
 net/vmw_vsock/af_vsock.c        | 21 +++++++++++++++++++--
 2 files changed, 35 insertions(+), 3 deletions(-)

-- 
2.20.1 (Apple Git-117)




Amazon Development Center (Romania) S.R.L. registered office: 27A Sf. Lazar Street, UBC5, floor 2, Iasi, Iasi County, 700045, Romania. Registered in Romania. Registration number J22/2621/2005.


             reply	other threads:[~2020-12-04 17:04 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-04 17:02 Andra Paraschiv [this message]
2020-12-04 17:02 ` [PATCH net-next v2 1/4] vm_sockets: Include flags field in the vsock address data structure Andra Paraschiv
2020-12-07  9:59   ` Stefano Garzarella
2020-12-07 19:25     ` Paraschiv, Andra-Irina
2020-12-07 21:29   ` Jakub Kicinski
2020-12-08 18:23     ` Paraschiv, Andra-Irina
2020-12-08 18:42       ` Jakub Kicinski
2020-12-09 10:48         ` Stefano Garzarella
2020-12-09 15:17           ` Paraschiv, Andra-Irina
2020-12-09 17:30             ` Jakub Kicinski
2020-12-10 15:29               ` Paraschiv, Andra-Irina
2020-12-04 17:02 ` [PATCH net-next v2 2/4] vm_sockets: Add VMADDR_FLAG_TO_HOST vsock flag Andra Paraschiv
2020-12-07  9:59   ` Stefano Garzarella
2020-12-07 19:45     ` Paraschiv, Andra-Irina
2020-12-04 17:02 ` [PATCH net-next v2 3/4] af_vsock: Set VMADDR_FLAG_TO_HOST flag on the receive path Andra Paraschiv
2020-12-07  9:59   ` Stefano Garzarella
2020-12-04 17:02 ` [PATCH net-next v2 4/4] af_vsock: Assign the vsock transport considering the vsock address flags Andra Paraschiv
2020-12-07 10:00   ` Stefano Garzarella
2020-12-07 19:51     ` Paraschiv, Andra-Irina
2020-12-07 10:05 ` [PATCH net-next v2 0/4] vsock: Add flags field in the vsock address Stefano Garzarella
2020-12-07 19:18   ` Paraschiv, Andra-Irina

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201204170235.84387-1-andraprs@amazon.com \
    --to=andraprs@amazon.com \
    --cc=davdunc@amazon.com \
    --cc=davem@davemloft.net \
    --cc=decui@microsoft.com \
    --cc=graf@amazon.de \
    --cc=jhansen@vmware.com \
    --cc=kuba@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=sgarzare@redhat.com \
    --cc=stefanha@redhat.com \
    --cc=vkuznets@redhat.com \
    --subject='Re: [PATCH net-next v2 0/4] vsock: Add flags field in the vsock address' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).