mbuf: introduce a flag to indicate a control mbuf
Since the flags field is now 64-bits, we can allow one bit to be used to indicate a control i.e. non-packet mbuf. Dedicate the high bit (bit 63) for this purpose and add in a utility macro to test if a given mbuf has the bit set or not. Signed-off-by: Bruce Richardson <bruce.richardson@intel.com> Acked-by: Olivier Matz <olivier.matz@6wind.com>
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@ -69,7 +69,9 @@ rte_ctrlmbuf_init(struct rte_mempool *mp,
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void *_m,
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__attribute__((unused)) unsigned i)
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{
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struct rte_mbuf *m = _m;
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rte_pktmbuf_init(mp, opaque_arg, _m, i);
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m->ol_flags |= CTRL_MBUF_FLAG;
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}
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/*
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@ -91,6 +91,7 @@ extern "C" {
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#define PKT_TX_IPV4_CSUM 0x1000 /**< Alias of PKT_TX_IP_CKSUM. */
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#define PKT_TX_IPV4 PKT_RX_IPV4_HDR /**< IPv4 with no IP checksum offload. */
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#define PKT_TX_IPV6 PKT_RX_IPV6_HDR /**< IPv6 packet */
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/*
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* Bit 14~13 used for L4 packet type with checksum enabled.
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* 00: Reserved
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@ -106,6 +107,9 @@ extern "C" {
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/* Bit 15 */
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#define PKT_TX_IEEE1588_TMST 0x8000 /**< TX IEEE1588 packet to timestamp. */
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/* Use final bit of flags to indicate a control mbuf */
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#define CTRL_MBUF_FLAG (1ULL << 63)
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/**
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* Bit Mask to indicate what bits required for building TX context
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*/
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@ -471,6 +475,21 @@ void rte_ctrlmbuf_init(struct rte_mempool *mp, void *opaque_arg,
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*/
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#define rte_ctrlmbuf_len(m) rte_pktmbuf_data_len(m)
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/**
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* Tests if an mbuf is a control mbuf
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*
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* @param m
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* The mbuf to be tested
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* @return
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* - True (1) if the mbuf is a control mbuf
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* - False(0) otherwise
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*/
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static inline int
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rte_is_ctrlmbuf(struct rte_mbuf *m)
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{
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return (!!(m->ol_flags & CTRL_MBUF_FLAG));
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}
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/* Operations on pkt mbuf */
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/**
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