mbuf: clean old refcnt option

[dpdk.git] / lib / librte_ether / rte_ether.h

diff --git a/lib/librte_ether/rte_ether.h b/lib/librte_ether/rte_ether.h
index 187608d..49f4576 100644 (file)
--- a/lib/librte_ether/rte_ether.h
+++ b/lib/librte_ether/rte_ether.h
@@ -49,6 +49,8 @@ extern "C" {
 
 #include <rte_memcpy.h>
 #include <rte_random.h>
+#include <rte_mbuf.h>
+#include <rte_byteorder.h>
 
 #define ETHER_ADDR_LEN  6 /**< Length of Ethernet address. */
 #define ETHER_TYPE_LEN  2 /**< Length of Ethernet type field. */
@@ -328,10 +330,85 @@ struct vxlan_hdr {
 #define ETHER_TYPE_RARP 0x8035 /**< Reverse Arp Protocol. */
 #define ETHER_TYPE_VLAN 0x8100 /**< IEEE 802.1Q VLAN tagging. */
 #define ETHER_TYPE_1588 0x88F7 /**< IEEE 802.1AS 1588 Precise Time Protocol. */
+#define ETHER_TYPE_SLOW 0x8809 /**< Slow protocols (LACP and Marker). */
+#define ETHER_TYPE_TEB  0x6558 /**< Transparent Ethernet Bridging. */
 
 #define ETHER_VXLAN_HLEN (sizeof(struct udp_hdr) + sizeof(struct vxlan_hdr))
 /**< VXLAN tunnel header length. */
 
+/**
+ * Extract VLAN tag information into mbuf
+ *
+ * Software version of VLAN stripping
+ *
+ * @param m
+ *   The packet mbuf.
+ * @return
+ *   - 0: Success
+ *   - 1: not a vlan packet
+ */
+static inline int rte_vlan_strip(struct rte_mbuf *m)
+{
+       struct ether_hdr *eh
+                = rte_pktmbuf_mtod(m, struct ether_hdr *);
+
+       if (eh->ether_type != rte_cpu_to_be_16(ETHER_TYPE_VLAN))
+               return -1;
+
+       struct vlan_hdr *vh = (struct vlan_hdr *)(eh + 1);
+       m->ol_flags |= PKT_RX_VLAN_PKT;
+       m->vlan_tci = rte_be_to_cpu_16(vh->vlan_tci);
+
+       /* Copy ether header over rather than moving whole packet */
+       memmove(rte_pktmbuf_adj(m, sizeof(struct vlan_hdr)),
+               eh, 2 * ETHER_ADDR_LEN);
+
+       return 0;
+}
+
+/**
+ * Insert VLAN tag into mbuf.
+ *
+ * Software version of VLAN unstripping
+ *
+ * @param m
+ *   The packet mbuf.
+ * @return
+ *   - 0: On success
+ *   -EPERM: mbuf is is shared overwriting would be unsafe
+ *   -ENOSPC: not enough headroom in mbuf
+ */
+static inline int rte_vlan_insert(struct rte_mbuf **m)
+{
+       struct ether_hdr *oh, *nh;
+       struct vlan_hdr *vh;
+
+       /* Can't insert header if mbuf is shared */
+       if (rte_mbuf_refcnt_read(*m) > 1) {
+               struct rte_mbuf *copy;
+
+               copy = rte_pktmbuf_clone(*m, (*m)->pool);
+               if (unlikely(copy == NULL))
+                       return -ENOMEM;
+               rte_pktmbuf_free(*m);
+               *m = copy;
+       }
+
+       oh = rte_pktmbuf_mtod(*m, struct ether_hdr *);
+       nh = (struct ether_hdr *)
+               rte_pktmbuf_prepend(*m, sizeof(struct vlan_hdr));
+       if (nh == NULL)
+               return -ENOSPC;
+
+       memmove(nh, oh, 2 * ETHER_ADDR_LEN);
+       nh->ether_type = rte_cpu_to_be_16(ETHER_TYPE_VLAN);
+
+       vh = (struct vlan_hdr *) (nh + 1);
+       vh->vlan_tci = rte_cpu_to_be_16((*m)->vlan_tci);
+
+       return 0;
+}
+
 #ifdef __cplusplus
 }
 #endif