Hi All:

This patch implements the multiqueue support for vhost-vDPA. The most
important requirement the control virtqueue support. The virtio-net
and vhost-net core are tweak to support control virtqueue as if what
data queue pairs are done: a dedicated vhost_net device which is
coupled with the NetClientState is intrdouced so most of the existing
vhost codes could be reused with minor changes. With the control
virtqueue, vhost-vDPA are extend to support creating and destroying
multiqueue queue pairs plus the control virtqueue.

Tests are done via the vp_vdpa driver in L1 guest.

Please reivew.

Thanks

Jason Wang (18):
  vhost_net: remove the meaningless assignment in vhost_net_start_one()
  vhost: use unsigned int for nvqs
  vhost_net: do not assume nvqs is always 2
  vhost-vdpa: remove the unnecessary check in vhost_vdpa_add()
  vhost-vdpa: don't cleanup twice in vhost_vdpa_add()
  vhost-vdpa: fix leaking of vhost_net in vhost_vdpa_add()
  vhost-vdpa: tweak the error label in vhost_vdpa_add()
  vhost-vdpa: fix the wrong assertion in vhost_vdpa_init()
  vhost-vdpa: remove the unncessary queue_index assignment
  vhost-vdpa: open device fd in net_init_vhost_vdpa()
  vhost-vdpa: classify one time request
  vhost-vdpa: prepare for the multiqueue support
  vhost-vdpa: let net_vhost_vdpa_init() returns NetClientState *
  net: introduce control client
  vhost-net: control virtqueue support
  virito-net: use "qps" instead of "queues" when possible
  virtio-net: vhost control virtqueue support
  vhost-vdpa: multiqueue support

 hw/net/vhost_net.c             |  48 +++++++---
 hw/net/virtio-net.c            | 165 ++++++++++++++++++---------------
 hw/virtio/vhost-vdpa.c         |  55 ++++++++++-
 include/hw/virtio/vhost-vdpa.h |   1 +
 include/hw/virtio/vhost.h      |   2 +-
 include/hw/virtio/virtio-net.h |   5 +-
 include/net/net.h              |   5 +
 include/net/vhost_net.h        |   7 +-
 net/net.c                      |  24 ++++-
 net/tap.c                      |   1 +
 net/vhost-user.c               |   1 +
 net/vhost-vdpa.c               | 150 +++++++++++++++++++++++-------
 12 files changed, 326 insertions(+), 138 deletions(-)

-- 
2.25.1

Patchew URL: https://patchew.org/QEMU/20210621041650.5826-1-jasowang@redhat.com/



Hi,

This series seems to have some coding style problems. See output below for
more information:

Type: series
Message-id: 20210621041650.5826-1-jasowang@redhat.com
Subject: [PATCH 00/18] vhost-vDPA multiqueue

=== TEST SCRIPT BEGIN ===
#!/bin/bash
git rev-parse base > /dev/null || exit 0
git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram
./scripts/checkpatch.pl --mailback base..
=== TEST SCRIPT END ===

Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
From https://github.com/patchew-project/qemu
 * [new tag]         patchew/20210621041650.5826-1-jasowang@redhat.com -> patchew/20210621041650.5826-1-jasowang@redhat.com
Switched to a new branch 'test'
f8fa9a3 vhost-vdpa: multiqueue support
8f59a43 virtio-net: vhost control virtqueue support
ec75ba0 virito-net: use "qps" instead of "queues" when possible
2bd3467 vhost-net: control virtqueue support
8276601 net: introduce control client
816e0a6 vhost-vdpa: let net_vhost_vdpa_init() returns NetClientState *
3033ddd vhost-vdpa: prepare for the multiqueue support
d3460f2 vhost-vdpa: classify one time request
3f6db79 vhost-vdpa: open device fd in net_init_vhost_vdpa()
7596feb vhost-vdpa: remove the unncessary queue_index assignment
ce7d8de vhost-vdpa: fix the wrong assertion in vhost_vdpa_init()
a8bc70a vhost-vdpa: tweak the error label in vhost_vdpa_add()
263c865 vhost-vdpa: fix leaking of vhost_net in vhost_vdpa_add()
32b4c0e vhost-vdpa: don't cleanup twice in vhost_vdpa_add()
fbc405c vhost-vdpa: remove the unnecessary check in vhost_vdpa_add()
7a12106 vhost_net: do not assume nvqs is always 2
1a9f738 vhost: use unsigned int for nvqs
5dff074 vhost_net: remove the meaningless assignment in vhost_net_start_one()

=== OUTPUT BEGIN ===
1/18 Checking commit 5dff074a8095 (vhost_net: remove the meaningless assignment in vhost_net_start_one())
2/18 Checking commit 1a9f7380e8f0 (vhost: use unsigned int for nvqs)
3/18 Checking commit 7a12106db152 (vhost_net: do not assume nvqs is always 2)
4/18 Checking commit fbc405c2ccec (vhost-vdpa: remove the unnecessary check in vhost_vdpa_add())
5/18 Checking commit 32b4c0e1f95c (vhost-vdpa: don't cleanup twice in vhost_vdpa_add())
6/18 Checking commit 263c8652e706 (vhost-vdpa: fix leaking of vhost_net in vhost_vdpa_add())
7/18 Checking commit a8bc70a72c41 (vhost-vdpa: tweak the error label in vhost_vdpa_add())
8/18 Checking commit ce7d8de36520 (vhost-vdpa: fix the wrong assertion in vhost_vdpa_init())
9/18 Checking commit 7596feb74e23 (vhost-vdpa: remove the unncessary queue_index assignment)
10/18 Checking commit 3f6db79bbb54 (vhost-vdpa: open device fd in net_init_vhost_vdpa())
11/18 Checking commit d3460f2b8886 (vhost-vdpa: classify one time request)
12/18 Checking commit 3033ddd3df9e (vhost-vdpa: prepare for the multiqueue support)
13/18 Checking commit 816e0a62ed3b (vhost-vdpa: let net_vhost_vdpa_init() returns NetClientState *)
14/18 Checking commit 8276601ad80d (net: introduce control client)
15/18 Checking commit 2bd3467c7183 (vhost-net: control virtqueue support)
16/18 Checking commit ec75ba0c5758 (virito-net: use "qps" instead of "queues" when possible)
WARNING: Block comments use a leading /* on a separate line
#294: FILE: hw/net/virtio-net.c:1420:
+    /* stop the backend before changing the number of qps to avoid handling a

total: 0 errors, 1 warnings, 457 lines checked

Patch 16/18 has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
17/18 Checking commit 8f59a439ccf2 (virtio-net: vhost control virtqueue support)
WARNING: Block comments use a leading /* on a separate line
#55: FILE: hw/net/virtio-net.c:3373:
+    /* Figure out the datapath queue pairs since the bakcend could

total: 0 errors, 1 warnings, 51 lines checked

Patch 17/18 has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
18/18 Checking commit f8fa9a3e2c56 (vhost-vdpa: multiqueue support)
ERROR: braces {} are necessary for all arms of this statement
#176: FILE: net/vhost-vdpa.c:284:
+        if (!ncs[i])
[...]

ERROR: braces {} are necessary for all arms of this statement
#183: FILE: net/vhost-vdpa.c:291:
+        if (!nc)
[...]

total: 2 errors, 0 warnings, 165 lines checked

Patch 18/18 has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

=== OUTPUT END ===

Test command exited with code: 1


The full log is available at
http://patchew.org/logs/20210621041650.5826-1-jasowang@redhat.com/testing.checkpatch/?type=message.
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