[dpdk-dev] [Bug 845] vf testpmd core dumped after executing "device_del dev1" in qemu

[dpdk-dev] [Bug 845] vf testpmd core dumped after executing "device_del dev1" in qemu

[bugzilla]

https://bugs.dpdk.org/show_bug.cgi?id=845

            Bug ID: 845
           Summary: vf testpmd core dumped after executing "device_del
                    dev1" in qemu
           Product: DPDK
           Version: 21.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: testpmd
          Assignee: dev@dpdk.org
          Reporter: yanx.xia@intel.com
  Target Milestone: ---

DPDK commit: b66412f24f17fcba5a248888bf4b3c1f5d6880de

OS: Ubuntu20.04.3  
Compiler: gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
Hardware platform: Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz.


Repoduced steps:

# 1. bind nic to vfio-pci
./usertools/dpdk-devbind.py -b vfio-pci 0000:81:00.0

# 2. launch qemu
taskset -c 0-7 qemu-system-x86_64 -enable-kvm                -pidfile
/tmp/.vm0.pid                -m 10240 -cpu host -smp 8 -name vm0               
-monitor unix:/tmp/vm0_monitor.sock,server,nowait                -chardev
socket,path=/tmp/vm0_qga0.sock,server,nowait,id=vm0_qga0                -device
virtio-serial                -device
virtserialport,chardev=vm0_qga0,name=org.qemu.guest_agent.0               
-device e1000,netdev=nttsip1                -netdev
user,id=nttsip1,hostfwd=tcp:10.240.183.247:6000-:22                -monitor
stdio                -drive file=/home/image/test_vfio.img                -vnc
:5                -device vfio-pci,host=0000:81:00.0,id=dev1

# 3. ssh vm and execute command in vm
ssh 10.240.183.247 -p 6000
echo 0 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
echo 1024 >
/sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
modprobe vfio
modprobe vfio-pci
echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
usertools/dpdk-devbind.py --force --bind=vfio-pci 0000:00:05.0

# 4. vf launch testpmd
x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 0,1,2,3,4,5,6,7 -n 1 -a
0000:00:05.0 --file-prefix=dpdk_10860_20211027111447   -- -i --hot-plug

# 5. execute "device_del dev1" in the qemu window 
device_del dev1

# 6. check output in tespmd window 


Output:
# EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.
EAL: uevent socket connection is broken.

The testpmd window hangs


Expected Result:
# Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
Invalid port_id=0
EAL: Cannot find device (0000:00:05.0) on bus (pci)

The tespmd window can be used normally.


Version the regression was introduced: 

commit c2bd9367e18f5b00c1a3c5eb281a512ef52c5dfd
Author: Harman Kalra <hkalra@marvell.com>
Date: Sat Oct 23 02:19:32 2021 +0530

lib: remove direct access to interrupt handle

Removing direct access to interrupt handle structure fields,
rather use respective get set APIs for the same.
Making changes to all the libraries access the interrupt handle fields.

Signed-off-by: Harman Kalra <hkalra@marvell.com>
Signed-off-by: David Marchand <david.marchand@redhat.com>
Tested-by: Raslan Darawsheh <rasland@nvidia.com>

lib/bbdev/rte_bbdev.c | 4 ++--
lib/eal/linux/eal_dev.c | 57 +++++++++++++++++++++++++++++--------------------
lib/ethdev/rte_ethdev.c | 14 ++++++------
3 files changed, 43 insertions, 32 deletions

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