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net/tap: do not send packets larger than MTU

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Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Acked-by: Keith Wiles <keith.wiles@intel.com>
This commit is contained in:
Pascal Mazon 2017-03-15 16:09:08 +01:00 committed by Ferruh Yigit
parent 2d5a4b62ff
commit 5025409c04
2 changed files with 7 additions and 0 deletions
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6
drivers/net/tap/rte_eth_tap.c
View File

@ -305,14 +305,19 @@ pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
struct tx_queue *txq = queue; struct tx_queue *txq = queue;
uint16_t num_tx = 0; uint16_t num_tx = 0;
unsigned long num_tx_bytes = 0; unsigned long num_tx_bytes = 0;
uint32_t max_size;
int i, n; int i, n;
if (unlikely(nb_pkts == 0)) if (unlikely(nb_pkts == 0))
return 0; return 0;
max_size = *txq->mtu + (ETHER_HDR_LEN + ETHER_CRC_LEN + 4);
for (i = 0; i < nb_pkts; i++) { for (i = 0; i < nb_pkts; i++) {
/* copy the tx frame data */ /* copy the tx frame data */
mbuf = bufs[num_tx]; mbuf = bufs[num_tx];
/* stats.errs will be incremented */
if (rte_pktmbuf_pkt_len(mbuf) > max_size)
break;
n = write(txq->fd, n = write(txq->fd,
rte_pktmbuf_mtod(mbuf, void *), rte_pktmbuf_mtod(mbuf, void *),
rte_pktmbuf_pkt_len(mbuf)); rte_pktmbuf_pkt_len(mbuf));
@ -646,6 +651,7 @@ tap_setup_queue(struct rte_eth_dev *dev,
rx->fd = fd; rx->fd = fd;
tx->fd = fd; tx->fd = fd;
tx->mtu = &dev->data->mtu;
return fd; return fd;
} }

1
drivers/net/tap/rte_eth_tap.h
View File

@ -60,6 +60,7 @@ struct rx_queue {
struct tx_queue { struct tx_queue {
int fd; int fd;
uint16_t *mtu; /* Pointer to MTU from dev_data */
struct pkt_stats stats; /* Stats for this TX queue */ struct pkt_stats stats; /* Stats for this TX queue */
}; };