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pktgen: fix packet generation 

pkt_gen->last_ok was not set properly, so after the first burst
pktgen instead of allocating new packet, will reuse old one, advance
eth_type_trans further, which would mean the stack will be seeing very
short bogus packets.

Fixes: 62f64aed62 ("pktgen: introduce xmit_mode '<start_xmit|netif_receive>'")
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexei Starovoitov 2015-05-11 15:19:48 -07:00 committed by David S. Miller
parent 147ef3e218
commit 9eea922264
1 changed files with 10 additions and 1 deletions
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11
net/core/pktgen.c
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@ -1189,6 +1189,16 @@ static ssize_t pktgen_if_write(struct file *file,
return -ENOTSUPP;
pkt_dev->xmit_mode = M_NETIF_RECEIVE;
/* make sure new packet is allocated every time
* pktgen_xmit() is called
*/
pkt_dev->last_ok = 1;
/* override clone_skb if user passed default value
* at module loading time
*/
pkt_dev->clone_skb = 0;
} else {
sprintf(pg_result,
"xmit_mode -:%s:- unknown\nAvailable modes: %s",
@ -3415,7 +3425,6 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
/* get out of the loop and wait
* until skb is consumed
*/
pkt_dev->last_ok = 1;
break;
}
/* skb was 'freed' by stack, so clean few