[PKTGEN]: vlan support
The attached patch allows pktgen to produce 802.1Q and Q-in-Q tagged frames.
I have used it for stress test a bridge and seems ok to me.
Unfortunately I have no access to net-2.6.x git tree so the diff is against
2.6.17.13.
Signed-off-by: Francesco Fondelli <francesco.fondelli@gmail.com>
Acked-by: Steven Whitehouse <steve@chygwyn.com>
Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 72145d4..0338027 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -109,6 +109,8 @@
*
* MPLS support by Steven Whitehouse <steve@chygwyn.com>
*
+ * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
+ *
*/
#include <linux/sys.h>
#include <linux/types.h>
@@ -137,6 +139,7 @@
#include <linux/inetdevice.h>
#include <linux/rtnetlink.h>
#include <linux/if_arp.h>
+#include <linux/if_vlan.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
@@ -178,6 +181,8 @@
#define F_TXSIZE_RND (1<<6) /* Transmit size is random */
#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
#define F_MPLS_RND (1<<8) /* Random MPLS labels */
+#define F_VID_RND (1<<9) /* Random VLAN ID */
+#define F_SVID_RND (1<<10) /* Random SVLAN ID */
/* Thread control flag bits */
#define T_TERMINATE (1<<0)
@@ -198,6 +203,9 @@
#define MAX_CFLOWS 65536
+#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
+#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
+
struct flow_state {
__u32 cur_daddr;
int count;
@@ -288,6 +296,15 @@
unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
__be32 labels[MAX_MPLS_LABELS];
+ /* VLAN/SVLAN (802.1Q/Q-in-Q) */
+ __u8 vlan_p;
+ __u8 vlan_cfi;
+ __u16 vlan_id; /* 0xffff means no vlan tag */
+
+ __u8 svlan_p;
+ __u8 svlan_cfi;
+ __u16 svlan_id; /* 0xffff means no svlan tag */
+
__u32 src_mac_count; /* How many MACs to iterate through */
__u32 dst_mac_count; /* How many MACs to iterate through */
@@ -644,6 +661,16 @@
i == pkt_dev->nr_labels-1 ? "\n" : ", ");
}
+ if (pkt_dev->vlan_id != 0xffff) {
+ seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
+ pkt_dev->vlan_id, pkt_dev->vlan_p, pkt_dev->vlan_cfi);
+ }
+
+ if (pkt_dev->svlan_id != 0xffff) {
+ seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
+ pkt_dev->svlan_id, pkt_dev->svlan_p, pkt_dev->svlan_cfi);
+ }
+
seq_printf(seq, " Flags: ");
if (pkt_dev->flags & F_IPV6)
@@ -673,6 +700,12 @@
if (pkt_dev->flags & F_MACDST_RND)
seq_printf(seq, "MACDST_RND ");
+ if (pkt_dev->flags & F_VID_RND)
+ seq_printf(seq, "VID_RND ");
+
+ if (pkt_dev->flags & F_SVID_RND)
+ seq_printf(seq, "SVID_RND ");
+
seq_puts(seq, "\n");
sa = pkt_dev->started_at;
@@ -1140,6 +1173,18 @@
else if (strcmp(f, "!MPLS_RND") == 0)
pkt_dev->flags &= ~F_MPLS_RND;
+ else if (strcmp(f, "VID_RND") == 0)
+ pkt_dev->flags |= F_VID_RND;
+
+ else if (strcmp(f, "!VID_RND") == 0)
+ pkt_dev->flags &= ~F_VID_RND;
+
+ else if (strcmp(f, "SVID_RND") == 0)
+ pkt_dev->flags |= F_SVID_RND;
+
+ else if (strcmp(f, "!SVID_RND") == 0)
+ pkt_dev->flags &= ~F_SVID_RND;
+
else {
sprintf(pg_result,
"Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
@@ -1445,6 +1490,128 @@
offset += sprintf(pg_result + offset,
"%08x%s", ntohl(pkt_dev->labels[n]),
n == pkt_dev->nr_labels-1 ? "" : ",");
+
+ if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
+ pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
+ pkt_dev->svlan_id = 0xffff;
+
+ if (debug)
+ printk("pktgen: VLAN/SVLAN auto turned off\n");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "vlan_id")) {
+ len = num_arg(&user_buffer[i], 4, &value);
+ if (len < 0) {
+ return len;
+ }
+ i += len;
+ if (value <= 4095) {
+ pkt_dev->vlan_id = value; /* turn on VLAN */
+
+ if (debug)
+ printk("pktgen: VLAN turned on\n");
+
+ if (debug && pkt_dev->nr_labels)
+ printk("pktgen: MPLS auto turned off\n");
+
+ pkt_dev->nr_labels = 0; /* turn off MPLS */
+ sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
+ } else {
+ pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
+ pkt_dev->svlan_id = 0xffff;
+
+ if (debug)
+ printk("pktgen: VLAN/SVLAN turned off\n");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "vlan_p")) {
+ len = num_arg(&user_buffer[i], 1, &value);
+ if (len < 0) {
+ return len;
+ }
+ i += len;
+ if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
+ pkt_dev->vlan_p = value;
+ sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
+ } else {
+ sprintf(pg_result, "ERROR: vlan_p must be 0-7");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "vlan_cfi")) {
+ len = num_arg(&user_buffer[i], 1, &value);
+ if (len < 0) {
+ return len;
+ }
+ i += len;
+ if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
+ pkt_dev->vlan_cfi = value;
+ sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
+ } else {
+ sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "svlan_id")) {
+ len = num_arg(&user_buffer[i], 4, &value);
+ if (len < 0) {
+ return len;
+ }
+ i += len;
+ if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
+ pkt_dev->svlan_id = value; /* turn on SVLAN */
+
+ if (debug)
+ printk("pktgen: SVLAN turned on\n");
+
+ if (debug && pkt_dev->nr_labels)
+ printk("pktgen: MPLS auto turned off\n");
+
+ pkt_dev->nr_labels = 0; /* turn off MPLS */
+ sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
+ } else {
+ pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
+ pkt_dev->svlan_id = 0xffff;
+
+ if (debug)
+ printk("pktgen: VLAN/SVLAN turned off\n");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "svlan_p")) {
+ len = num_arg(&user_buffer[i], 1, &value);
+ if (len < 0) {
+ return len;
+ }
+ i += len;
+ if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
+ pkt_dev->svlan_p = value;
+ sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
+ } else {
+ sprintf(pg_result, "ERROR: svlan_p must be 0-7");
+ }
+ return count;
+ }
+
+ if (!strcmp(name, "svlan_cfi")) {
+ len = num_arg(&user_buffer[i], 1, &value);
+ if (len < 0) {
+ return len;
+ }
+ i += len;
+ if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
+ pkt_dev->svlan_cfi = value;
+ sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
+ } else {
+ sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
+ }
return count;
}
@@ -1949,6 +2116,14 @@
htonl(0x000fffff));
}
+ if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
+ pkt_dev->vlan_id = pktgen_random() % 4096;
+ }
+
+ if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
+ pkt_dev->svlan_id = pktgen_random() % 4096;
+ }
+
if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
if (pkt_dev->flags & F_UDPSRC_RND)
pkt_dev->cur_udp_src =
@@ -2092,10 +2267,18 @@
struct pktgen_hdr *pgh = NULL;
__be16 protocol = __constant_htons(ETH_P_IP);
__be32 *mpls;
+ __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
+ __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
+ __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
+ __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
+
if (pkt_dev->nr_labels)
protocol = __constant_htons(ETH_P_MPLS_UC);
+ if (pkt_dev->vlan_id != 0xffff)
+ protocol = __constant_htons(ETH_P_8021Q);
+
/* Update any of the values, used when we're incrementing various
* fields.
*/
@@ -2103,7 +2286,9 @@
datalen = (odev->hard_header_len + 16) & ~0xf;
skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
- pkt_dev->nr_labels*sizeof(u32), GFP_ATOMIC);
+ pkt_dev->nr_labels*sizeof(u32) +
+ VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
+ GFP_ATOMIC);
if (!skb) {
sprintf(pkt_dev->result, "No memory");
return NULL;
@@ -2116,6 +2301,24 @@
mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
if (pkt_dev->nr_labels)
mpls_push(mpls, pkt_dev);
+
+ if (pkt_dev->vlan_id != 0xffff) {
+ if(pkt_dev->svlan_id != 0xffff) {
+ svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
+ *svlan_tci = htons(pkt_dev->svlan_id);
+ *svlan_tci |= pkt_dev->svlan_p << 5;
+ *svlan_tci |= pkt_dev->svlan_cfi << 4;
+ svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
+ *svlan_encapsulated_proto = __constant_htons(ETH_P_8021Q);
+ }
+ vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
+ *vlan_tci = htons(pkt_dev->vlan_id);
+ *vlan_tci |= pkt_dev->vlan_p << 5;
+ *vlan_tci |= pkt_dev->vlan_cfi << 4;
+ vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
+ *vlan_encapsulated_proto = __constant_htons(ETH_P_IP);
+ }
+
iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
@@ -2124,7 +2327,7 @@
/* Eth + IPh + UDPh + mpls */
datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
- pkt_dev->nr_labels*sizeof(u32);
+ pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
if (datalen < sizeof(struct pktgen_hdr))
datalen = sizeof(struct pktgen_hdr);
@@ -2146,7 +2349,8 @@
iph->check = 0;
iph->check = ip_fast_csum((void *)iph, iph->ihl);
skb->protocol = protocol;
- skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32);
+ skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32) -
+ VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
skb->dev = odev;
skb->pkt_type = PACKET_HOST;
skb->nh.iph = iph;
@@ -2218,7 +2422,6 @@
pgh->tv_sec = htonl(timestamp.tv_sec);
pgh->tv_usec = htonl(timestamp.tv_usec);
}
- pkt_dev->seq_num++;
return skb;
}
@@ -2402,17 +2605,26 @@
struct pktgen_hdr *pgh = NULL;
__be16 protocol = __constant_htons(ETH_P_IPV6);
__be32 *mpls;
+ __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
+ __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
+ __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
+ __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
if (pkt_dev->nr_labels)
protocol = __constant_htons(ETH_P_MPLS_UC);
+ if (pkt_dev->vlan_id != 0xffff)
+ protocol = __constant_htons(ETH_P_8021Q);
+
/* Update any of the values, used when we're incrementing various
* fields.
*/
mod_cur_headers(pkt_dev);
skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
- pkt_dev->nr_labels*sizeof(u32), GFP_ATOMIC);
+ pkt_dev->nr_labels*sizeof(u32) +
+ VLAN_TAG_SIZE(pkt_dev) + SVLAN_TAG_SIZE(pkt_dev),
+ GFP_ATOMIC);
if (!skb) {
sprintf(pkt_dev->result, "No memory");
return NULL;
@@ -2425,16 +2637,34 @@
mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
if (pkt_dev->nr_labels)
mpls_push(mpls, pkt_dev);
+
+ if (pkt_dev->vlan_id != 0xffff) {
+ if(pkt_dev->svlan_id != 0xffff) {
+ svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
+ *svlan_tci = htons(pkt_dev->svlan_id);
+ *svlan_tci |= pkt_dev->svlan_p << 5;
+ *svlan_tci |= pkt_dev->svlan_cfi << 4;
+ svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
+ *svlan_encapsulated_proto = __constant_htons(ETH_P_8021Q);
+ }
+ vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
+ *vlan_tci = htons(pkt_dev->vlan_id);
+ *vlan_tci |= pkt_dev->vlan_p << 5;
+ *vlan_tci |= pkt_dev->vlan_cfi << 4;
+ vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
+ *vlan_encapsulated_proto = __constant_htons(ETH_P_IPV6);
+ }
+
iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
memcpy(eth, pkt_dev->hh, 12);
- *(u16 *) & eth[12] = __constant_htons(ETH_P_IPV6);
+ *(u16 *) & eth[12] = protocol;
/* Eth + IPh + UDPh + mpls */
datalen = pkt_dev->cur_pkt_size - 14 -
sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
- pkt_dev->nr_labels*sizeof(u32);
+ pkt_dev->nr_labels*sizeof(u32) - VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
if (datalen < sizeof(struct pktgen_hdr)) {
datalen = sizeof(struct pktgen_hdr);
@@ -2458,7 +2688,8 @@
ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
- skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32);
+ skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32) -
+ VLAN_TAG_SIZE(pkt_dev) - SVLAN_TAG_SIZE(pkt_dev);
skb->protocol = protocol;
skb->dev = odev;
skb->pkt_type = PACKET_HOST;
@@ -2531,7 +2762,7 @@
pgh->tv_sec = htonl(timestamp.tv_sec);
pgh->tv_usec = htonl(timestamp.tv_usec);
}
- pkt_dev->seq_num++;
+ /* pkt_dev->seq_num++; FF: you really mean this? */
return skb;
}
@@ -3177,6 +3408,13 @@
pkt_dev->udp_dst_min = 9;
pkt_dev->udp_dst_max = 9;
+ pkt_dev->vlan_p = 0;
+ pkt_dev->vlan_cfi = 0;
+ pkt_dev->vlan_id = 0xffff;
+ pkt_dev->svlan_p = 0;
+ pkt_dev->svlan_cfi = 0;
+ pkt_dev->svlan_id = 0xffff;
+
strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
if (!pktgen_setup_dev(pkt_dev)) {
