On 26 November 2014 at 09:39, Alexandru Badicioiu
<[email protected]> wrote:
> This patch has no description. The title is not self explanatory either.
> Also the existence of eth0 should be verified  before mapping the loop0 to
> eth0 - some platforms may use other interface names (e.g. fmX-gby for FSL
> DPAA platforms).  I think a better solution would be to enumerate the
> available interfaces  and pick a suitable one.
I second that opinion. On my ChromeBook (great development
platforms!), the only Ethernet-like
interface is called mlan0.

>
>
> On 25 November 2014 at 18:24, Maxim Uvarov <[email protected]> wrote:
>>
>> Signed-off-by: Maxim Uvarov <[email protected]>
>> ---
>>  platform/linux-generic/odp_packet_io.c | 27 +++++++++++++++++++++++++++
>>  1 file changed, 27 insertions(+)
>>
>> diff --git a/platform/linux-generic/odp_packet_io.c
>> b/platform/linux-generic/odp_packet_io.c
>> index c523350..501b2e9 100644
>> --- a/platform/linux-generic/odp_packet_io.c
>> +++ b/platform/linux-generic/odp_packet_io.c
>> @@ -156,6 +156,33 @@ odp_pktio_t odp_pktio_open(const char *dev,
>> odp_buffer_pool_t pool)
>>         pktio_entry_t *pktio_entry;
>>         int res;
>>         int fanout = 1;
>> +       char loop0[IFNAMSIZ] = "eth0"; /* linux-generic loop0 device*/
This comment is strange. If ODP uses an interface like "eth0", how can
that be a loopback interface?
Won't packet I/O using this interface be mapped onto the real Ethernet
interface and sent onto the physical link?

-- Ola

>> +       char *loop_hint;
>> +
>> +       if (strlen(dev) > IFNAMSIZ) {
>> +               /* ioctl names limitation */
>> +               ODP_ERR("pktio name %s is too big, limit is %d bytes\n",
>> +                       dev, IFNAMSIZ);
>> +               return ODP_PKTIO_INVALID;
>> +       }
>> +
>> +       loop_hint = getenv("ODP_PKTIO_LOOPDEV");
>> +       if (!strncmp(dev, "loop0", 5)) {
>> +               if (loop_hint && (strlen(loop_hint) > 0)) {
>> +                       if (strlen(loop_hint) > IFNAMSIZ) {
>> +                               ODP_ERR("pktio name %s is too big, limit
>> is %d bytes\n",
>> +                                       loop_hint, IFNAMSIZ);
>> +                               return ODP_PKTIO_INVALID;
>> +                       }
>> +
>> +                       memset(loop0, 0, IFNAMSIZ);
>> +                       memcpy(loop0, loop_hint, strlen(loop_hint));
>> +                       ODP_DBG("pktio rename loop0 to %s\n", loop_hint);
>> +               } else {
>> +                       ODP_DBG("pktio rename loop0 to eth0\n");
>> +                       dev = loop0;
>> +               }
>> +       }
>>
>>         id = alloc_lock_pktio_entry();
>>         if (id == ODP_PKTIO_INVALID) {
>> --
>> 1.8.5.1.163.gd7aced9
>>
>>
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>
>
>
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