uint64_t tso_segsz:RTE_MBUF_TSO_SEGSZ_BITS;
/**< TCP TSO segment size */
- /* fields for TX offloading of tunnels */
+ /*
+ * Fields for Tx offloading of tunnels.
+ * These are undefined for packets which don't request
+ * any tunnel offloads (outer IP or UDP checksum,
+ * tunnel TSO).
+ *
+ * PMDs should not use these fields unconditionally
+ * when calculating offsets.
+ *
+ * Applications are expected to set appropriate tunnel
+ * offload flags when they fill in these fields.
+ */
uint64_t outer_l3_len:RTE_MBUF_OUTL3_LEN_BITS;
/**< Outer L3 (IP) Hdr Length. */
uint64_t outer_l2_len:RTE_MBUF_OUTL2_LEN_BITS;
*/
#define rte_pktmbuf_detach_extbuf(m) rte_pktmbuf_detach(m)
+/* internal */
+static inline void
+__rte_pktmbuf_copy_hdr(struct rte_mbuf *mdst, const struct rte_mbuf *msrc)
+{
+ mdst->port = msrc->port;
+ mdst->vlan_tci = msrc->vlan_tci;
+ mdst->vlan_tci_outer = msrc->vlan_tci_outer;
+ mdst->tx_offload = msrc->tx_offload;
+ mdst->hash = msrc->hash;
+ mdst->packet_type = msrc->packet_type;
+ mdst->timestamp = msrc->timestamp;
+}
+
/**
* Attach packet mbuf to another packet mbuf.
*
mi->ol_flags = m->ol_flags | IND_ATTACHED_MBUF;
}
- mi->buf_iova = m->buf_iova;
- mi->buf_addr = m->buf_addr;
- mi->buf_len = m->buf_len;
+ __rte_pktmbuf_copy_hdr(mi, m);
mi->data_off = m->data_off;
mi->data_len = m->data_len;
- mi->port = m->port;
- mi->vlan_tci = m->vlan_tci;
- mi->vlan_tci_outer = m->vlan_tci_outer;
- mi->tx_offload = m->tx_offload;
- mi->hash = m->hash;
+ mi->buf_iova = m->buf_iova;
+ mi->buf_addr = m->buf_addr;
+ mi->buf_len = m->buf_len;
mi->next = NULL;
mi->pkt_len = mi->data_len;
mi->nb_segs = 1;
- mi->packet_type = m->packet_type;
- mi->timestamp = m->timestamp;
__rte_mbuf_sanity_check(mi, 1);
__rte_mbuf_sanity_check(m, 0);
}
/**
- * Creates a "clone" of the given packet mbuf.
+ * Create a "clone" of the given packet mbuf.
*
* Walks through all segments of the given packet mbuf, and for each of them:
* - Creates a new packet mbuf from the given pool.
* - The pointer to the new "clone" mbuf on success.
* - NULL if allocation fails.
*/
-static inline struct rte_mbuf *rte_pktmbuf_clone(struct rte_mbuf *md,
- struct rte_mempool *mp)
-{
- struct rte_mbuf *mc, *mi, **prev;
- uint32_t pktlen;
- uint16_t nseg;
+struct rte_mbuf *
+rte_pktmbuf_clone(struct rte_mbuf *md, struct rte_mempool *mp);
- if (unlikely ((mc = rte_pktmbuf_alloc(mp)) == NULL))
- return NULL;
-
- mi = mc;
- prev = &mi->next;
- pktlen = md->pkt_len;
- nseg = 0;
-
- do {
- nseg++;
- rte_pktmbuf_attach(mi, md);
- *prev = mi;
- prev = &mi->next;
- } while ((md = md->next) != NULL &&
- (mi = rte_pktmbuf_alloc(mp)) != NULL);
-
- *prev = NULL;
- mc->nb_segs = nseg;
- mc->pkt_len = pktlen;
-
- /* Allocation of new indirect segment failed */
- if (unlikely (mi == NULL)) {
- rte_pktmbuf_free(mc);
- return NULL;
- }
-
- __rte_mbuf_sanity_check(mc, 1);
- return mc;
-}
+/**
+ * Create a full copy of a given packet mbuf.
+ *
+ * Copies all the data from a given packet mbuf to a newly allocated
+ * set of mbufs. The private data are is not copied.
+ *
+ * @param m
+ * The packet mbuf to be copiedd.
+ * @param mp
+ * The mempool from which the "clone" mbufs are allocated.
+ * @param offset
+ * The number of bytes to skip before copying.
+ * If the mbuf does not have that many bytes, it is an error
+ * and NULL is returned.
+ * @param length
+ * The upper limit on bytes to copy. Passing UINT32_MAX
+ * means all data (after offset).
+ * @return
+ * - The pointer to the new "clone" mbuf on success.
+ * - NULL if allocation fails.
+ */
+__rte_experimental
+struct rte_mbuf *
+rte_pktmbuf_copy(const struct rte_mbuf *m, struct rte_mempool *mp,
+ uint32_t offset, uint32_t length);
/**
* Adds given value to the refcnt of all packet mbuf segments.
return 0;
}
+/**
+ * @internal used by rte_pktmbuf_linearize().
+ */
+int __rte_pktmbuf_linearize(struct rte_mbuf *mbuf);
+
/**
* Linearize data in mbuf.
*
static inline int
rte_pktmbuf_linearize(struct rte_mbuf *mbuf)
{
- size_t seg_len, copy_len;
- struct rte_mbuf *m;
- struct rte_mbuf *m_next;
- char *buffer;
-
if (rte_pktmbuf_is_contiguous(mbuf))
return 0;
-
- /* Extend first segment to the total packet length */
- copy_len = rte_pktmbuf_pkt_len(mbuf) - rte_pktmbuf_data_len(mbuf);
-
- if (unlikely(copy_len > rte_pktmbuf_tailroom(mbuf)))
- return -1;
-
- buffer = rte_pktmbuf_mtod_offset(mbuf, char *, mbuf->data_len);
- mbuf->data_len = (uint16_t)(mbuf->pkt_len);
-
- /* Append data from next segments to the first one */
- m = mbuf->next;
- while (m != NULL) {
- m_next = m->next;
-
- seg_len = rte_pktmbuf_data_len(m);
- rte_memcpy(buffer, rte_pktmbuf_mtod(m, char *), seg_len);
- buffer += seg_len;
-
- rte_pktmbuf_free_seg(m);
- m = m_next;
- }
-
- mbuf->next = NULL;
- mbuf->nb_segs = 1;
-
- return 0;
+ return __rte_pktmbuf_linearize(mbuf);
}
/**
git.droids-corp.org / dpdk.git / blobdiff