netdev - [PATCH iproute2-next v2 0/2] Add vdpa device management tool

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Date:   Thu, 28 Jan 2021 20:43:17 +0200
From:   Parav Pandit <parav@...dia.com>
To:     <virtualization@...ts.linux-foundation.org>,
        <netdev@...r.kernel.org>, <dsahern@...il.com>,
        <stephen@...workplumber.org>, <mst@...hat.com>,
        <jasowang@...hat.com>
CC:     Parav Pandit <parav@...dia.com>
Subject: [PATCH iproute2-next v2 0/2] Add vdpa device management tool

Linux vdpa interface allows vdpa device management functionality.
This includes adding, removing, querying vdpa devices.

vdpa interface also includes showing supported management devices
which support such operations.

This patchset includes kernel uapi headers and a vdpa tool.

examples:

$ vdpa mgmtdev show
vdpasim:
  supported_classes net

$ vdpa mgmtdev show -jp
{
    "show": {
        "vdpasim": {
            "supported_classes": [ "net" ]
        }
    }
}

Create a vdpa device of type networking named as "foo2" from
the management device vdpasim_net:

$ vdpa dev add mgmtdev vdpasim_net name foo2

Show the newly created vdpa device by its name:
$ vdpa dev show foo2
foo2: type network mgmtdev vdpasim_net vendor_id 0 max_vqs 2 max_vq_size 256

$ vdpa dev show foo2 -jp
{
    "dev": {
        "foo2": {
            "type": "network",
            "mgmtdev": "vdpasim_net",
            "vendor_id": 0,
            "max_vqs": 2,
            "max_vq_size": 256
        }
    }
}

Delete the vdpa device after its use:
$ vdpa dev del foo2

Patch summary:
Patch-1 adds kernel headers for vdpa subsystem
Patch-2 adds vdpa tool along with helper library routines and man pages 

Kernel headers are from the vhost kernel tree [1] from branch linux-next.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git

---
changelog:
v1->v2:
 - addressed below comments from David
 - added and used library helpers for socket communication
 - added and used library functions for string processing helpers
 - added and used library functions indent processing helpers

Parav Pandit (2):
  Add kernel headers
  vdpa: Add vdpa tool

 Makefile                        |   2 +-
 include/mnl_utils.h             |  16 +
 include/uapi/linux/vdpa.h       |  40 ++
 include/uapi/linux/virtio_ids.h |  58 +++
 include/utils.h                 |  16 +
 lib/mnl_utils.c                 | 121 ++++++
 lib/utils.c                     |  66 ++++
 man/man8/vdpa-dev.8             |  96 +++++
 man/man8/vdpa-mgmtdev.8         |  53 +++
 man/man8/vdpa.8                 |  76 ++++
 vdpa/Makefile                   |  24 ++
 vdpa/vdpa.c                     | 669 ++++++++++++++++++++++++++++++++
 12 files changed, 1236 insertions(+), 1 deletion(-)
 create mode 100644 include/uapi/linux/vdpa.h
 create mode 100644 include/uapi/linux/virtio_ids.h
 create mode 100644 man/man8/vdpa-dev.8
 create mode 100644 man/man8/vdpa-mgmtdev.8
 create mode 100644 man/man8/vdpa.8
 create mode 100644 vdpa/Makefile
 create mode 100644 vdpa/vdpa.c

-- 
2.26.2