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[PKTGEN]: Centralize packet overhead tracking

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Track the extra packet overhead for VLAN tags, MPLS, IPSEC etc

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jamal Hadi Salim 2007-07-02 22:39:50 -07:00 committed by David S. Miller
parent eef6caf8a9
commit 16dab72f65
1 changed files with 15 additions and 12 deletions
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27
net/core/pktgen.c
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@ -228,6 +228,7 @@ struct pktgen_dev {
int min_pkt_size; /* = ETH_ZLEN; */
int max_pkt_size; /* = ETH_ZLEN; */
int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
int nfrags;
__u32 delay_us; /* Default delay */
__u32 delay_ns;
@ -2075,6 +2076,13 @@ static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
pkt_dev->idle_acc += now - start;
}
static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
{
pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
}
/* Increment/randomize headers according to flags and current values
* for IP src/dest, UDP src/dst port, MAC-Addr src/dst
*/
@ -2323,9 +2331,7 @@ static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
datalen = (odev->hard_header_len + 16) & ~0xf;
skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
pkt_dev->nr_labels*sizeof(u32) +
VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
GFP_ATOMIC);
pkt_dev->pkt_overhead, GFP_ATOMIC);
if (!skb) {
sprintf(pkt_dev->result, "No memory");
return NULL;
@ -2368,7 +2374,7 @@ static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
/* Eth + IPh + UDPh + mpls */
datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
pkt_dev->pkt_overhead;
if (datalen < sizeof(struct pktgen_hdr))
datalen = sizeof(struct pktgen_hdr);
@ -2391,8 +2397,7 @@ static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
iph->check = ip_fast_csum((void *)iph, iph->ihl);
skb->protocol = protocol;
skb->mac_header = (skb->network_header - ETH_HLEN -
pkt_dev->nr_labels * sizeof(u32) -
VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev));
pkt_dev->pkt_overhead);
skb->dev = odev;
skb->pkt_type = PACKET_HOST;
@ -2662,9 +2667,7 @@ static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
mod_cur_headers(pkt_dev);
skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
pkt_dev->nr_labels*sizeof(u32) +
VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
GFP_ATOMIC);
pkt_dev->pkt_overhead, GFP_ATOMIC);
if (!skb) {
sprintf(pkt_dev->result, "No memory");
return NULL;
@ -2708,7 +2711,7 @@ static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
/* Eth + IPh + UDPh + mpls */
datalen = pkt_dev->cur_pkt_size - 14 -
sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
pkt_dev->pkt_overhead;
if (datalen < sizeof(struct pktgen_hdr)) {
datalen = sizeof(struct pktgen_hdr);
@ -2738,8 +2741,7 @@ static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
skb->mac_header = (skb->network_header - ETH_HLEN -
pkt_dev->nr_labels * sizeof(u32) -
VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev));
pkt_dev->pkt_overhead);
skb->protocol = protocol;
skb->dev = odev;
skb->pkt_type = PACKET_HOST;
@ -2857,6 +2859,7 @@ static void pktgen_run(struct pktgen_thread *t)
pkt_dev->started_at = getCurUs();
pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
pkt_dev->next_tx_ns = 0;
set_pkt_overhead(pkt_dev);
strcpy(pkt_dev->result, "Starting");
started++;