Re: [PATCH] usertools: rewrite pmdinfo

["Robin Jarry" <robin@jarry.cc>]

Ferruh Yigit, Sep 13, 2022 at 13:29:
> Hi Robin,
>
> Thanks for the work.
>
> One of the major usecase of the script is to get information from binary 
> drivers. So intentions of the script is to run it on drivers more than 
> applications (dpdk-testpmd).
>
> When I run it on one of the .so drivers, it is generating some warnings 
> [1], is this expected?
>
> [1]
> $ ./usertools/dpdk-pmdinfo.py ./build/drivers/librte_net_ixgbe.so 
>  
>
> warning: cannot find librte_ethdev.so.23
> warning: cannot find librte_eal.so.23
> warning: cannot find librte_kvargs.so.23
> warning: cannot find librte_telemetry.so.23
> warning: cannot find librte_net.so.23
> warning: cannot find librte_mbuf.so.23
> warning: cannot find librte_mempool.so.23
> warning: cannot find librte_ring.so.23
> warning: cannot find librte_meter.so.23
> warning: cannot find librte_bus_pci.so.23
> warning: cannot find librte_pci.so.23
> warning: cannot find librte_bus_vdev.so.23
> warning: cannot find librte_hash.so.23
> warning: cannot find librte_rcu.so.23
> warning: cannot find librte_security.so.23
> warning: cannot find librte_cryptodev.so.23
> [
>    {
>      "name": "net_ixgbe_vf",
>      "params": "pflink_fullchk=<0|1>",
>      "kmod": "* igb_uio | vfio-pci",
>      "devices": [
> ...
> ...

Hi Ferruh,

yes it tries to parse all required (DT_NEEDED) dynamic libraries as did
the previous version of the script. The warnings are displayed when
a needed lib is not found.

You can fix that by exporting LD_LIBRARY_PATH:

$ LD_LIBRARY_PATH=build/lib/:build/drivers/ usertools/dpdk-pmdinfo.py build/drivers/librte_net_ixgbe.so | head
[
  {
    "name": "net_ixgbe_vf",
    "params": "pflink_fullchk=<0|1>",
    "kmod": "* igb_uio | vfio-pci",
    "devices": [
      {
        "vendor_id": "8086",
        "device_id": "10ed",
        "subsystem_device_id": "ffff",
...
...

If the libraries are installed in a standard path, it should not be
necessary to export LD_LIBRARY_PATH.