[ovs-dev] [PATCH v3] dpdk: Migrate to the new pdump API.
Ilya Maximets
i.maximets at ovn.org
Mon Nov 11 17:25:34 UTC 2019
Sorry, I missed the 'dpdk-latest' tag.
On 11.11.2019 16:01, Ilya Maximets wrote:
> DPDK commit 660098d61f57 ("pdump: use generic multi-process channel")
> switched pdump to use generic DPDK IPC instead of sockets.
> Old API was deprecated and removed. Updating OVS code accordingly.
>
> Signed-off-by: Ilya Maximets <i.maximets at ovn.org>
> ---
>
> Version 3:
> * Added note about XDG_RUNTIME_DIR.
>
> Version 2:
> * Removed unneeded deinitialization on error.
> * Docs updated.
>
> Documentation/topics/dpdk/pdump.rst | 13 +++++++------
> lib/dpdk.c | 11 +----------
> 2 files changed, 8 insertions(+), 16 deletions(-)
>
> diff --git a/Documentation/topics/dpdk/pdump.rst b/Documentation/topics/dpdk/pdump.rst
> index 7bd1d3e9f..affd98371 100644
> --- a/Documentation/topics/dpdk/pdump.rst
> +++ b/Documentation/topics/dpdk/pdump.rst
> @@ -41,8 +41,7 @@ To use pdump, simply launch OVS as usual, then navigate to the ``app/pdump``
> directory in DPDK, ``make`` the application and run like so::
>
> $ sudo ./build/app/dpdk-pdump -- \
> - --pdump port=0,queue=0,rx-dev=/tmp/pkts.pcap \
> - --server-socket-path=/usr/local/var/run/openvswitch
> + --pdump port=0,queue=0,rx-dev=/tmp/pkts.pcap
>
> The above command captures traffic received on queue 0 of port 0 and stores it
> in ``/tmp/pkts.pcap``. Other combinations of port numbers, queues numbers and
> @@ -50,11 +49,13 @@ pcap locations are of course also available to use. For example, to capture all
> packets that traverse port 0 in a single pcap file::
>
> $ sudo ./build/app/dpdk-pdump -- \
> - --pdump 'port=0,queue=*,rx-dev=/tmp/pkts.pcap,tx-dev=/tmp/pkts.pcap' \
> - --server-socket-path=/usr/local/var/run/openvswitch
> + --pdump 'port=0,queue=*,rx-dev=/tmp/pkts.pcap,tx-dev=/tmp/pkts.pcap'
>
> -``server-socket-path`` must be set to the value of ``ovs_rundir()`` which
> -typically resolves to ``/usr/local/var/run/openvswitch``.
> +.. note::
> +
> + ``XDG_RUNTIME_DIR`` environment variable might need to be adjusted to
> + OVS runtime directory (``/var/run/openvswitch`` in most cases) for
> + ``dpdk-pdump`` utility if OVS started by non-root user.
>
> Many tools are available to view the contents of the pcap file. Once example is
> tcpdump. Issue the following command to view the contents of ``pkts.pcap``::
> diff --git a/lib/dpdk.c b/lib/dpdk.c
> index f90cda75a..748f63d31 100644
> --- a/lib/dpdk.c
> +++ b/lib/dpdk.c
> @@ -27,7 +27,6 @@
> #include <rte_memzone.h>
> #include <rte_version.h>
> #ifdef DPDK_PDUMP
> -#include <rte_mempool.h>
> #include <rte_pdump.h>
> #endif
>
> @@ -434,17 +433,9 @@ dpdk_init__(const struct smap *ovs_other_config)
>
> #ifdef DPDK_PDUMP
> VLOG_INFO("DPDK pdump packet capture enabled");
> - err = rte_pdump_init(ovs_rundir());
> + err = rte_pdump_init();
> if (err) {
> VLOG_INFO("Error initialising DPDK pdump");
> - rte_pdump_uninit();
> - } else {
> - char *server_socket_path;
> -
> - server_socket_path = xasprintf("%s/%s", ovs_rundir(),
> - "pdump_server_socket");
> - fatal_signal_add_file_to_unlink(server_socket_path);
> - free(server_socket_path);
> }
> #endif
>
>
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