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kni: support chained mbufs

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rx_q fifo may have chained mbufs, merge them into single skb before
handing to the network stack.

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
This commit is contained in:
Ferruh Yigit 2016-04-26 13:37:58 +01:00 committed by Thomas Monjalon
parent 166605b1bf
commit d89a58dfe9
2 changed files with 64 additions and 23 deletions
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4
lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
View File

@ -113,7 +113,9 @@ struct rte_kni_mbuf {
void *buf_addr __attribute__((__aligned__(RTE_CACHE_LINE_SIZE)));
char pad0[10];
uint16_t data_off; /**< Start address of data in segment buffer. */
char pad1[4];
char pad1[2];
uint8_t nb_segs; /**< Number of segments. */
char pad4[1];
uint64_t ol_flags; /**< Offload features. */
char pad2[4];
uint32_t pkt_len; /**< Total pkt len: sum of all segment data_len. */

83
lib/librte_eal/linuxapp/kni/kni_net.c
View File

@ -147,7 +147,8 @@ kni_net_rx_normal(struct kni_dev *kni)
/* Transfer received packets to netif */
for (i = 0; i < num_rx; i++) {
kva = (void *)va[i] - kni->mbuf_va + kni->mbuf_kva;
len = kva->data_len;
len = kva->pkt_len;
data_kva = kva->buf_addr + kva->data_off - kni->mbuf_va
+ kni->mbuf_kva;
@ -156,22 +157,41 @@ kni_net_rx_normal(struct kni_dev *kni)
KNI_ERR("Out of mem, dropping pkts\n");
/* Update statistics */
kni->stats.rx_dropped++;
continue;
}
else {
/* Align IP on 16B boundary */
skb_reserve(skb, 2);
/* Align IP on 16B boundary */
skb_reserve(skb, 2);
if (kva->nb_segs == 1) {
memcpy(skb_put(skb, len), data_kva, len);
skb->dev = dev;
skb->protocol = eth_type_trans(skb, dev);
skb->ip_summed = CHECKSUM_UNNECESSARY;
} else {
int nb_segs;
int kva_nb_segs = kva->nb_segs;
/* Call netif interface */
netif_rx_ni(skb);
for (nb_segs = 0; nb_segs < kva_nb_segs; nb_segs++) {
memcpy(skb_put(skb, kva->data_len),
data_kva, kva->data_len);
/* Update statistics */
kni->stats.rx_bytes += len;
kni->stats.rx_packets++;
if (!kva->next)
break;
kva = kva->next - kni->mbuf_va + kni->mbuf_kva;
data_kva = kva->buf_addr + kva->data_off
- kni->mbuf_va + kni->mbuf_kva;
}
}
skb->dev = dev;
skb->protocol = eth_type_trans(skb, dev);
skb->ip_summed = CHECKSUM_UNNECESSARY;
/* Call netif interface */
netif_rx_ni(skb);
/* Update statistics */
kni->stats.rx_bytes += len;
kni->stats.rx_packets++;
}
/* Burst enqueue mbufs into free_q */
@ -308,7 +328,7 @@ kni_net_rx_lo_fifo_skb(struct kni_dev *kni)
/* Copy mbufs to sk buffer and then call tx interface */
for (i = 0; i < num; i++) {
kva = (void *)va[i] - kni->mbuf_va + kni->mbuf_kva;
len = kva->data_len;
len = kva->pkt_len;
data_kva = kva->buf_addr + kva->data_off - kni->mbuf_va +
kni->mbuf_kva;
@ -329,20 +349,39 @@ kni_net_rx_lo_fifo_skb(struct kni_dev *kni)
if (skb == NULL) {
KNI_ERR("Out of mem, dropping pkts\n");
kni->stats.rx_dropped++;
continue;
}
else {
/* Align IP on 16B boundary */
skb_reserve(skb, 2);
/* Align IP on 16B boundary */
skb_reserve(skb, 2);
if (kva->nb_segs == 1) {
memcpy(skb_put(skb, len), data_kva, len);
skb->dev = dev;
skb->ip_summed = CHECKSUM_UNNECESSARY;
} else {
int nb_segs;
int kva_nb_segs = kva->nb_segs;
kni->stats.rx_bytes += len;
kni->stats.rx_packets++;
for (nb_segs = 0; nb_segs < kva_nb_segs; nb_segs++) {
memcpy(skb_put(skb, kva->data_len),
data_kva, kva->data_len);
/* call tx interface */
kni_net_tx(skb, dev);
if (!kva->next)
break;
kva = kva->next - kni->mbuf_va + kni->mbuf_kva;
data_kva = kva->buf_addr + kva->data_off
- kni->mbuf_va + kni->mbuf_kva;
}
}
skb->dev = dev;
skb->ip_summed = CHECKSUM_UNNECESSARY;
kni->stats.rx_bytes += len;
kni->stats.rx_packets++;
/* call tx interface */
kni_net_tx(skb, dev);
}
/* enqueue all the mbufs from rx_q into free_q */