I would use it :) It's useful to store the IP protocol number (UDP, TCP etc) and version of IP (4, 6) and then relay packet to specific handler.
08.09.2014 16:17, Olivier MATZ ?????: > Hi Bruce, > > On 09/03/2014 05:49 PM, Bruce Richardson wrote: >> Replace a reserved slot with the new packet type field used to identify >> the type of the packet, i.e. what protocols are used. >> >> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com> >> --- >> lib/librte_mbuf/rte_mbuf.h | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h >> index f136d37..8d0c6fb 100644 >> --- a/lib/librte_mbuf/rte_mbuf.h >> +++ b/lib/librte_mbuf/rte_mbuf.h >> @@ -146,7 +146,7 @@ struct rte_mbuf { >> uint32_t reserved1; /**< Unused field. Required for padding */ >> >> /* remaining bytes are set on RX when pulling packet from descriptor */ >> - uint16_t reserved2; /**< Unused field. Required for padding */ >> + uint16_t packet_type; /**< Type of packet, e.g. protocols used */ >> uint16_t data_len; /**< Amount of data in segment buffer. */ >> uint32_t pkt_len; /**< Total pkt len: sum of all segments. */ >> uint16_t l3_len:9; /**< L3 (IP) Header Length. */ >> > This patch adds a new fields that nobody uses. So why should we add it ? -- Sincerely, Yerden Zhumabekov State Technical Service Astana, KZ