From: Ouyang Changchun Date: Wed, 5 Nov 2014 07:10:34 +0000 (+0800) Subject: examples/vhost: rework duplicated code X-Git-Tag: spdx-start~10186 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=72ec8d77ac68cdc2b74428e25e06765fbb10d0cb;p=dpdk.git examples/vhost: rework duplicated code Extract a function to replace duplicated codes in one copy and zero copy TX function. Signed-off-by: Changchun Ouyang Acked-by: Konstantin Ananyev --- diff --git a/examples/vhost/main.c b/examples/vhost/main.c index 5ca8dced2b..29163137c4 100644 --- a/examples/vhost/main.c +++ b/examples/vhost/main.c @@ -1039,6 +1039,57 @@ virtio_tx_local(struct vhost_dev *vdev, struct rte_mbuf *m) return -1; } +/* + * Check if the destination MAC of a packet is one local VM, + * and get its vlan tag, and offset if it is. + */ +static inline int __attribute__((always_inline)) +find_local_dest(struct virtio_net *dev, struct rte_mbuf *m, + uint32_t *offset, uint16_t *vlan_tag) +{ + struct virtio_net_data_ll *dev_ll = ll_root_used; + struct ether_hdr *pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); + + while (dev_ll != NULL) { + if ((dev_ll->vdev->ready == DEVICE_RX) + && ether_addr_cmp(&(pkt_hdr->d_addr), + &dev_ll->vdev->mac_address)) { + /* + * Drop the packet if the TX packet is + * destined for the TX device. + */ + if (dev_ll->vdev->dev->device_fh == dev->device_fh) { + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") TX: Source and destination" + " MAC addresses are the same. Dropping " + "packet.\n", + dev_ll->vdev->dev->device_fh); + return -1; + } + + /* + * HW vlan strip will reduce the packet length + * by minus length of vlan tag, so need restore + * the packet length by plus it. + */ + *offset = VLAN_HLEN; + *vlan_tag = + (uint16_t) + vlan_tags[(uint16_t)dev_ll->vdev->dev->device_fh]; + + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") TX: pkt to local VM device id:" + "(%"PRIu64") vlan tag: %d.\n", + dev->device_fh, dev_ll->vdev->dev->device_fh, + vlan_tag); + + break; + } + dev_ll = dev_ll->next; + } + return 0; +} + /* * This function routes the TX packet to the correct interface. This may be a local device * or the physical port. @@ -1050,8 +1101,6 @@ virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m, uint16_t vlan_tag) struct rte_mbuf **m_table; unsigned len, ret, offset = 0; const uint16_t lcore_id = rte_lcore_id(); - struct virtio_net_data_ll *dev_ll = ll_root_used; - struct ether_hdr *pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); struct virtio_net *dev = vdev->dev; /*check if destination is local VM*/ @@ -1061,43 +1110,9 @@ virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m, uint16_t vlan_tag) } if (vm2vm_mode == VM2VM_HARDWARE) { - while (dev_ll != NULL) { - if ((dev_ll->vdev->ready == DEVICE_RX) - && ether_addr_cmp(&(pkt_hdr->d_addr), - &dev_ll->vdev->mac_address)) { - /* - * Drop the packet if the TX packet is - * destined for the TX device. - */ - if (dev_ll->vdev->dev->device_fh == dev->device_fh) { - LOG_DEBUG(VHOST_DATA, - "(%"PRIu64") TX: Source and destination" - " MAC addresses are the same. Dropping " - "packet.\n", - dev_ll->vdev->dev->device_fh); - rte_pktmbuf_free(m); - return; - } - - /* - * HW vlan strip will reduce the packet length - * by minus length of vlan tag, so need restore - * the packet length by plus it. - */ - offset = VLAN_HLEN; - vlan_tag = - (uint16_t) - vlan_tags[(uint16_t)dev_ll->vdev->dev->device_fh]; - - LOG_DEBUG(VHOST_DATA, - "(%"PRIu64") TX: pkt to local VM device id:" - "(%"PRIu64") vlan tag: %d.\n", - dev->device_fh, dev_ll->vdev->dev->device_fh, - vlan_tag); - - break; - } - dev_ll = dev_ll->next; + if (find_local_dest(dev, m, &offset, &vlan_tag) != 0) { + rte_pktmbuf_free(m); + return; } } @@ -1726,8 +1741,6 @@ virtio_tx_route_zcp(struct virtio_net *dev, struct rte_mbuf *m, struct rte_mbuf *mbuf = NULL; unsigned len, ret, offset = 0; struct vpool *vpool; - struct virtio_net_data_ll *dev_ll = ll_root_used; - struct ether_hdr *pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); uint16_t vlan_tag = (uint16_t)vlan_tags[(uint16_t)dev->device_fh]; uint16_t vmdq_rx_q = ((struct vhost_dev *)dev->priv)->vmdq_rx_q; @@ -1756,46 +1769,10 @@ virtio_tx_route_zcp(struct virtio_net *dev, struct rte_mbuf *m, * such a ambiguous situation, so pkt will lost. */ vlan_tag = external_pkt_default_vlan_tag; - while (dev_ll != NULL) { - if (likely(dev_ll->vdev->ready == DEVICE_RX) && - ether_addr_cmp(&(pkt_hdr->d_addr), - &dev_ll->vdev->mac_address)) { - - /* - * Drop the packet if the TX packet is destined - * for the TX device. - */ - if (unlikely(dev_ll->vdev->dev->device_fh - == dev->device_fh)) { - LOG_DEBUG(VHOST_DATA, - "(%"PRIu64") TX: Source and destination" - "MAC addresses are the same. Dropping " - "packet.\n", - dev_ll->vdev->dev->device_fh); - MBUF_HEADROOM_UINT32(mbuf) - = (uint32_t)desc_idx; - __rte_mbuf_raw_free(mbuf); - return; - } - - /* - * Packet length offset 4 bytes for HW vlan - * strip when L2 switch back. - */ - offset = 4; - vlan_tag = - (uint16_t) - vlan_tags[(uint16_t)dev_ll->vdev->dev->device_fh]; - - LOG_DEBUG(VHOST_DATA, - "(%"PRIu64") TX: pkt to local VM device id:" - "(%"PRIu64") vlan tag: %d.\n", - dev->device_fh, dev_ll->vdev->dev->device_fh, - vlan_tag); - - break; - } - dev_ll = dev_ll->next; + if (find_local_dest(dev, m, &offset, &vlan_tag) != 0) { + MBUF_HEADROOM_UINT32(mbuf) = (uint32_t)desc_idx; + __rte_mbuf_raw_free(mbuf); + return; } }