[dpdk-dev] [PATCH v2 0/5] allow procinfo and pdump on eth vdev

[Jianfeng Tan]

v2:
  - Add spinlock for vdev device list as suggested by Anatoly.
  - Add ring, cxgbe and remove the free in each PMDs as suggested by Matan.
  - Rebase on master.

As we know, we have below limitations in vdev:
  - dpdk-procinfo cannot get the stats of (most) vdev in primary process;
  - dpdk-pdump cannot dump the packets for (most) vdev in primary proces;
  - secondary process cannot use (most) vdev in primary process.

The very first reason is that the secondary process actually does not know
the existence of those vdevs as vdevs are chained on a linked list, and
not shareable to secondary.

In this patch series, we would like to propose a vdev sharing model like this:
  - As a secondary process boots, all devices (including vdev) in primary
    will be automatically shared. After both primary and secondary process
    booted,
  - Device add/remove in primary will be translated to device hog plug/unplug
    event in secondary processes. (TODO)
  - Device add in secondary
    * If that kind of device support multi-process, the secondary will
      request the primary to probe the device and the primary to share
      it to the secondary. It's not necessary to have secondary-private
      device in this case. (TODO)
    * If that kind of device does not support multi-process, the secondary
      will probe the device by itself, and the port id is shared among
      all primary/secondary processes.

This patch series don't:
  - provide secondary data path (Rx/Tx) support for each specific vdev.

How to test:

Step 0: start testpmd with a vhost port; and a VM connected to the vhost port.

Step 1: try using dpdk-procinfo to get the stats.
 $(dpdk-procinfo) --log-level=8 --no-pci -- --stats

Step 2: try using dpdk-pdump to dump the packets.
 $(dpdk-pdump) -- --pdump 'port=0,queue=*,rx-dev=/tmp/rx.pcap'

Jianfeng Tan (5):
  eal: bring forward multi-process channel init
  bus/vdev: add lock on vdev device list
  bus/vdev: bus scan by multi-process channel
  drivers/net: not use private eth dev data
  drivers/net: share vdev data to secondary process

 drivers/bus/vdev/Makefile                 |   1 +
 drivers/bus/vdev/vdev.c                   | 187 ++++++++++++++++++++++++++----
 drivers/net/af_packet/rte_eth_af_packet.c |  43 +++----
 drivers/net/bonding/rte_eth_bond_pmd.c    |  13 +++
 drivers/net/cxgbe/cxgbe_main.c            |   1 -
 drivers/net/failsafe/failsafe.c           |  14 +++
 drivers/net/kni/rte_eth_kni.c             |  26 +++--
 drivers/net/null/rte_eth_null.c           |  32 ++---
 drivers/net/octeontx/octeontx_ethdev.c    |  29 ++---
 drivers/net/pcap/rte_eth_pcap.c           |  32 ++---
 drivers/net/ring/rte_eth_ring.c           |  17 +--
 drivers/net/softnic/rte_eth_softnic.c     |  19 ++-
 drivers/net/tap/rte_eth_tap.c             |  24 ++--
 drivers/net/vhost/rte_eth_vhost.c         |  36 +++---
 lib/librte_eal/bsdapp/eal/eal.c           |  23 ++--
 lib/librte_eal/linuxapp/eal/eal.c         |  23 ++--
 16 files changed, 354 insertions(+), 166 deletions(-)

-- 
2.7.4