diff options
| author | Jamal Hadi Salim <hadi@cyberus.ca> | 2007-07-02 22:39:50 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-07-10 22:16:26 -0700 |
| commit | 16dab72f65a6aab0aa72866e00c91b58a2794082 (patch) | |
| tree | 2e0b5871e75b9b4cef7c38d2d783147b942086ae /net/core | |
| parent | eef6caf8a916f32f8d9b2a02d4fa7674736c00ac (diff) | |
[PKTGEN]: Centralize packet overhead tracking
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>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/pktgen.c | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c index dffe067e7a7..9f0a780aa91 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -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++; |