[PKTGEN]: Add MPLS extension. (ca6549af) · Commits · EulixOS / Software / Kernel

Documentation/networking/pktgen.txt

+19 −1

Original line number	Diff line number	Diff line
		@@ -109,6 +109,22 @@ Examples:
		cycle through the port range.
		pgset "udp_dst_max 9" set UDP destination port max.

		pgset "mpls 0001000a,0002000a,0000000a" set MPLS labels (in this example
		outer label=16,middle label=32,
		inner label=0 (IPv4 NULL)) Note that
		there must be no spaces between the
		arguments. Leading zeros are required.
		Do not set the bottom of stack bit,
		thats done automatically. If you do
		set the bottom of stack bit, that
		indicates that you want to randomly
		generate that address and the flag
		MPLS_RND will be turned on. You
		can have any mix of random and fixed
		labels in the label stack.

		pgset "mpls 0" turn off mpls (or any invalid argument works too!)

		pgset stop aborts injection. Also, ^C aborts generator.


		@@ -167,6 +183,8 @@ pkt_size
		min_pkt_size
		max_pkt_size

		mpls

		udp_src_min
		udp_src_max

net/core/pktgen.c

+147 −11

Original line number	Diff line number	Diff line
		@@ -106,6 +106,9 @@
		*
		* interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
		* 050103
		*
		* MPLS support by Steven Whitehouse <steve@chygwyn.com>
		*
		*/
		#include <linux/sys.h>
		#include <linux/types.h>
		@@ -154,7 +157,7 @@
		#include <asm/div64.h> /* do_div */
		#include <asm/timex.h>

		#define VERSION "pktgen v2.66: Packet Generator for packet performance testing.\n"
		#define VERSION "pktgen v2.67: Packet Generator for packet performance testing.\n"

		/* #define PG_DEBUG(a) a */
		#define PG_DEBUG(a)
		@@ -162,6 +165,8 @@
		/* The buckets are exponential in 'width' */
		#define LAT_BUCKETS_MAX 32
		#define IP_NAME_SZ 32
		#define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
		#define MPLS_STACK_BOTTOM __constant_htonl(0x00000100)

		/* Device flag bits */
		#define F_IPSRC_RND (1<<0) /* IP-Src Random */
		@@ -172,6 +177,7 @@
		#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
		#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 */

		/* Thread control flag bits */
		#define T_TERMINATE (1<<0)
		@@ -278,6 +284,10 @@ struct pktgen_dev {
		__u16 udp_dst_min; /* inclusive, dest UDP port */
		__u16 udp_dst_max; /* exclusive, dest UDP port */

		/* MPLS */
		unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
		__be32 labels[MAX_MPLS_LABELS];

		__u32 src_mac_count; /* How many MACs to iterate through */
		__u32 dst_mac_count; /* How many MACs to iterate through */

		@@ -623,9 +633,19 @@ static int pktgen_if_show(struct seq_file seq, void v)
		pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);

		seq_printf(seq,
		" src_mac_count: %d dst_mac_count: %d \n Flags: ",
		" src_mac_count: %d dst_mac_count: %d\n",
		pkt_dev->src_mac_count, pkt_dev->dst_mac_count);

		if (pkt_dev->nr_labels) {
		unsigned i;
		seq_printf(seq, " mpls: ");
		for(i = 0; i < pkt_dev->nr_labels; i++)
		seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
		i == pkt_dev->nr_labels-1 ? "\n" : ", ");
		}

		seq_printf(seq, " Flags: ");

		if (pkt_dev->flags & F_IPV6)
		seq_printf(seq, "IPV6 ");

		@@ -644,6 +664,9 @@ static int pktgen_if_show(struct seq_file seq, void v)
		if (pkt_dev->flags & F_UDPDST_RND)
		seq_printf(seq, "UDPDST_RND ");

		if (pkt_dev->flags & F_MPLS_RND)
		seq_printf(seq, "MPLS_RND ");

		if (pkt_dev->flags & F_MACSRC_RND)
		seq_printf(seq, "MACSRC_RND ");

		@@ -691,6 +714,29 @@ static int pktgen_if_show(struct seq_file seq, void v)
		return 0;
		}


		static int hex32_arg(const char __user user_buffer, __u32 num)
		{
		int i = 0;
		*num = 0;

		for(; i < 8; i++) {
		char c;
		*num <<= 4;
		if (get_user(c, &user_buffer[i]))
		return -EFAULT;
		if ((c >= '0') && (c <= '9'))
		*num \|= c - '0';
		else if ((c >= 'a') && (c <= 'f'))
		*num \|= c - 'a' + 10;
		else if ((c >= 'A') && (c <= 'F'))
		*num \|= c - 'A' + 10;
		else
		break;
		}
		return i;
		}

		static int count_trail_chars(const char __user * user_buffer,
		unsigned int maxlen)
		{
		@@ -759,6 +805,35 @@ static int strn_len(const char __user * user_buffer, unsigned int maxlen)
		return i;
		}

		static ssize_t get_labels(const char __user buffer, struct pktgen_dev pkt_dev)
		{
		unsigned n = 0;
		char c;
		ssize_t i = 0;
		int len;

		pkt_dev->nr_labels = 0;
		do {
		__u32 tmp;
		len = hex32_arg(&buffer[i], &tmp);
		if (len <= 0)
		return len;
		pkt_dev->labels[n] = htonl(tmp);
		if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
		pkt_dev->flags \|= F_MPLS_RND;
		i += len;
		if (get_user(c, &buffer[i]))
		return -EFAULT;
		i++;
		n++;
		if (n >= MAX_MPLS_LABELS)
		return -E2BIG;
		} while(c == ',');

		pkt_dev->nr_labels = n;
		return i;
		}

		static ssize_t pktgen_if_write(struct file *file,
		const char __user * user_buffer, size_t count,
		loff_t * offset)
		@@ -1059,6 +1134,12 @@ static ssize_t pktgen_if_write(struct file *file,
		else if (strcmp(f, "!MACDST_RND") == 0)
		pkt_dev->flags &= ~F_MACDST_RND;

		else if (strcmp(f, "MPLS_RND") == 0)
		pkt_dev->flags \|= F_MPLS_RND;

		else if (strcmp(f, "!MPLS_RND") == 0)
		pkt_dev->flags &= ~F_MPLS_RND;

		else {
		sprintf(pg_result,
		"Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
		@@ -1354,6 +1435,19 @@ static ssize_t pktgen_if_write(struct file *file,
		return count;
		}

		if (!strcmp(name, "mpls")) {
		unsigned n, offset;
		len = get_labels(&user_buffer[i], pkt_dev);
		if (len < 0) { return len; }
		i += len;
		offset = sprintf(pg_result, "OK: mpls=");
		for(n = 0; n < pkt_dev->nr_labels; n++)
		offset += sprintf(pg_result + offset,
		"%08x%s", ntohl(pkt_dev->labels[n]),
		n == pkt_dev->nr_labels-1 ? "" : ",");
		return count;
		}

		sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
		return -EINVAL;
		}
		@@ -1846,6 +1940,15 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
		pkt_dev->hh[1] = tmp;
		}

		if (pkt_dev->flags & F_MPLS_RND) {
		unsigned i;
		for(i = 0; i < pkt_dev->nr_labels; i++)
		if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
		pkt_dev->labels[i] = MPLS_STACK_BOTTOM \|
		(pktgen_random() &
		htonl(0x000fffff));
		}

		if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
		if (pkt_dev->flags & F_UDPSRC_RND)
		pkt_dev->cur_udp_src =
		@@ -1968,6 +2071,16 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
		pkt_dev->flows[flow].count++;
		}

		static void mpls_push(__be32 mpls, struct pktgen_dev pkt_dev)
		{
		unsigned i;
		for(i = 0; i < pkt_dev->nr_labels; i++) {
		*mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
		}
		mpls--;
		*mpls \|= MPLS_STACK_BOTTOM;
		}

		static struct sk_buff fill_packet_ipv4(struct net_device odev,
		struct pktgen_dev *pkt_dev)
		{
		@@ -1977,6 +2090,11 @@ static struct sk_buff fill_packet_ipv4(struct net_device odev,
		int datalen, iplen;
		struct iphdr *iph;
		struct pktgen_hdr *pgh = NULL;
		__be16 protocol = __constant_htons(ETH_P_IP);
		__be32 *mpls;

		if (pkt_dev->nr_labels)
		protocol = __constant_htons(ETH_P_MPLS_UC);

		/* Update any of the values, used when we're incrementing various
		* fields.
		@@ -1984,7 +2102,8 @@ static struct sk_buff fill_packet_ipv4(struct net_device odev,
		mod_cur_headers(pkt_dev);

		datalen = (odev->hard_header_len + 16) & ~0xf;
		skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen, GFP_ATOMIC);
		skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + datalen +
		pkt_dev->nr_labels*sizeof(u32), GFP_ATOMIC);
		if (!skb) {
		sprintf(pkt_dev->result, "No memory");
		return NULL;
		@@ -1994,13 +2113,18 @@ static struct sk_buff fill_packet_ipv4(struct net_device odev,

		/* Reserve for ethernet and IP header */
		eth = (__u8 *) skb_push(skb, 14);
		mpls = (__be32 )skb_put(skb, pkt_dev->nr_labelssizeof(__u32));
		if (pkt_dev->nr_labels)
		mpls_push(mpls, pkt_dev);
		iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
		udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));

		memcpy(eth, pkt_dev->hh, 12);
		(u16 ) & eth[12] = __constant_htons(ETH_P_IP);
		(u16 ) & eth[12] = protocol;

		datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
		/* Eth + IPh + UDPh + mpls */
		datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
		pkt_dev->nr_labels*sizeof(u32);
		if (datalen < sizeof(struct pktgen_hdr))
		datalen = sizeof(struct pktgen_hdr);

		@@ -2021,8 +2145,8 @@ static struct sk_buff fill_packet_ipv4(struct net_device odev,
		iph->tot_len = htons(iplen);
		iph->check = 0;
		iph->check = ip_fast_csum((void *)iph, iph->ihl);
		skb->protocol = __constant_htons(ETH_P_IP);
		skb->mac.raw = ((u8 *) iph) - 14;
		skb->protocol = protocol;
		skb->mac.raw = ((u8 ) iph) - 14 - pkt_dev->nr_labelssizeof(u32);
		skb->dev = odev;
		skb->pkt_type = PACKET_HOST;

		@@ -2274,13 +2398,19 @@ static struct sk_buff fill_packet_ipv6(struct net_device odev,
		int datalen;
		struct ipv6hdr *iph;
		struct pktgen_hdr *pgh = NULL;
		__be16 protocol = __constant_htons(ETH_P_IPV6);
		__be32 *mpls;

		if (pkt_dev->nr_labels)
		protocol = __constant_htons(ETH_P_MPLS_UC);

		/* 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, GFP_ATOMIC);
		skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16 +
		pkt_dev->nr_labels*sizeof(u32), GFP_ATOMIC);
		if (!skb) {
		sprintf(pkt_dev->result, "No memory");
		return NULL;
		@@ -2290,13 +2420,19 @@ static struct sk_buff fill_packet_ipv6(struct net_device odev,

		/* Reserve for ethernet and IP header */
		eth = (__u8 *) skb_push(skb, 14);
		mpls = (__be32 )skb_put(skb, pkt_dev->nr_labelssizeof(__u32));
		if (pkt_dev->nr_labels)
		mpls_push(mpls, pkt_dev);
		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);

		datalen = pkt_dev->cur_pkt_size - 14 - sizeof(struct ipv6hdr) - sizeof(struct udphdr); /* Eth + IPh + UDPh */
		/* Eth + IPh + UDPh + mpls */
		datalen = pkt_dev->cur_pkt_size - 14 -
		sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
		pkt_dev->nr_labels*sizeof(u32);

		if (datalen < sizeof(struct pktgen_hdr)) {
		datalen = sizeof(struct pktgen_hdr);
		@@ -2320,8 +2456,8 @@ static struct sk_buff fill_packet_ipv6(struct net_device odev,
		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;
		skb->protocol = __constant_htons(ETH_P_IPV6);
		skb->mac.raw = ((u8 ) iph) - 14 - pkt_dev->nr_labelssizeof(u32);
		skb->protocol = protocol;
		skb->dev = odev;
		skb->pkt_type = PACKET_HOST;