iflib: report output drops and handle ENOBUFS properlyHEADmain

- Fix an mbuf leak with iflib.simple_tx=1 when we run out of tx descs
in iflib_encap().  It seems odd to free the mbuf in iflib_encap(),
but that routine consumes mbufs for other reasons, and it seemed
safest to free there rather than have the simple tx routine parse
return values to determine what needed to be freed.

- Increment counters for output drops when ENOBUFS is encountered
and output errors when other transmit errors are encountered for both
the simple and normal tx routines.

- Performed driver changes so that iflib drivers now add the generic
output drop and output error counters to their private counters in their
ifdi_get_counter routines.

Reviewed by: kbowling, markj
Differential Revision: https://reviews.freebsd.org/D52369
Sponsored by: Netflix

0 files changed, 0 insertions, 0 deletions