On 7/15/2017 6:57 PM, Gaetan Rivet wrote: > Add the "exec" device type. > The parameters given to this type of device will be executed in a shell. > The output of this command is then used as a definition for a device. > > That command can be re-interpreted if the related device is not > plugged-in. It allows for a device definition to react to system > changes (e.g. changing PCI bus for a given device). > > Signed-off-by: Gaetan Rivet <gaetan.ri...@6wind.com> > Acked-by: Olga Shern <ol...@mellanox.com> > --- > doc/guides/nics/fail_safe.rst | 20 +++++++ > drivers/net/failsafe/failsafe_args.c | 95 > +++++++++++++++++++++++++++++++++ > drivers/net/failsafe/failsafe_ether.c | 7 +++ > drivers/net/failsafe/failsafe_private.h | 4 ++ > 4 files changed, 126 insertions(+) > > diff --git a/doc/guides/nics/fail_safe.rst b/doc/guides/nics/fail_safe.rst > index 5ec3031..be73d7e 100644 > --- a/doc/guides/nics/fail_safe.rst > +++ b/doc/guides/nics/fail_safe.rst > @@ -87,6 +87,19 @@ Fail-safe command line parameters > additional sub-device parameters if need be. They will be passed on to the > sub-device. > > +- **exec(<shell command>)** parameter > + > + This parameter allows the user to provide a command to the fail-safe PMD to > + execute and define a sub-device. > + It is done within a regular shell context. > + The first line of its output is read by the fail-safe PMD and otherwise > + interpreted as if passed by the regular **dev** parameter. > + Any other line is discarded. > + If the command fail or output an incorrect string, the sub-device is not > + initialized. > + All commas within the ``shell command`` are replaced by spaces before > + executing the command. This helps using scripts to specify devices. > + > - **mac** parameter [MAC address] > > This parameter allows the user to set a default MAC address to the > fail-safe > @@ -135,6 +148,13 @@ This section shows some example of using **testpmd** > with a fail-safe PMD. > -w 'net_failsafe0,mac=de:ad:be:ef:01:02,dev(84:00.0),dev(net_ring0)' > -w 81:00.0 -- -i > > +#. Start testpmd using a flexible device definition > + > + .. code-block:: console > + > + $RTE_TARGET/build/app/testpmd -c 0xff -n 4 --no-pci \ > + --vdev='net_failsafe0,exec(echo 84:00.0)' -- -i
Hi Gaetan, What is the usecase for this feature. How this is different from --vdev='net_failsafe0,dev(`echo 84:00.0`)' ?
