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[PKTGEN]: Introduce sequential flows

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By default all flows in pktgen are randomly selected.
This patch introduces ability to have all defined flows to
be sent sequentially. Robert defined randomness to be the
default behavior.

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 22:40:36 -07:00 committed by David S. Miller
parent 16dab72f65
commit 007a531b0a
1 changed files with 52 additions and 8 deletions
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60
net/core/pktgen.c
View file

@ -181,6 +181,7 @@
#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 */
#define F_FLOW_SEQ (1<<11) /* Sequential flows */
/* Thread control flag bits */
#define T_TERMINATE (1<<0)
@ -207,8 +208,12 @@ static struct proc_dir_entry *pg_proc_dir = NULL;
struct flow_state {
__be32 cur_daddr;
int count;
__u32 flags;
};
/* flow flag bits */
#define F_INIT (1<<0) /* flow has been initialized */
struct pktgen_dev {
/*
* Try to keep frequent/infrequent used vars. separated.
@ -342,6 +347,7 @@ struct pktgen_dev {
unsigned cflows; /* Concurrent flows (config) */
unsigned lflow; /* Flow length (config) */
unsigned nflows; /* accumulated flows (stats) */
unsigned curfl; /* current sequenced flow (state)*/
char result[512];
};
@ -691,6 +697,13 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
if (pkt_dev->flags & F_MPLS_RND)
seq_printf(seq, "MPLS_RND ");
if (pkt_dev->cflows) {
if (pkt_dev->flags & F_FLOW_SEQ)
seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
else
seq_printf(seq, "FLOW_RND ");
}
if (pkt_dev->flags & F_MACSRC_RND)
seq_printf(seq, "MACSRC_RND ");
@ -1182,6 +1195,9 @@ static ssize_t pktgen_if_write(struct file *file,
else if (strcmp(f, "!SVID_RND") == 0)
pkt_dev->flags &= ~F_SVID_RND;
else if (strcmp(f, "FLOW_SEQ") == 0)
pkt_dev->flags |= F_FLOW_SEQ;
else if (strcmp(f, "!IPV6") == 0)
pkt_dev->flags &= ~F_IPV6;
@ -1190,7 +1206,7 @@ static ssize_t pktgen_if_write(struct file *file,
"Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
f,
"IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
"MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND\n");
"MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ\n");
return count;
}
sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
@ -2083,6 +2099,37 @@ static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
}
static inline int f_seen(struct pktgen_dev *pkt_dev, int flow)
{
if (pkt_dev->flows[flow].flags & F_INIT)
return 1;
else
return 0;
}
static inline int f_pick(struct pktgen_dev *pkt_dev)
{
int flow = pkt_dev->curfl;
if (pkt_dev->flags & F_FLOW_SEQ) {
if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
/* reset time */
pkt_dev->flows[flow].count = 0;
pkt_dev->curfl += 1;
if (pkt_dev->curfl >= pkt_dev->cflows)
pkt_dev->curfl = 0; /*reset */
}
} else {
flow = random32() % pkt_dev->cflows;
if (pkt_dev->flows[flow].count > pkt_dev->lflow)
pkt_dev->flows[flow].count = 0;
}
return pkt_dev->curfl;
}
/* Increment/randomize headers according to flags and current values
* for IP src/dest, UDP src/dst port, MAC-Addr src/dst
*/
@ -2092,12 +2139,8 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
__u32 imx;
int flow = 0;
if (pkt_dev->cflows) {
flow = random32() % pkt_dev->cflows;
if (pkt_dev->flows[flow].count > pkt_dev->lflow)
pkt_dev->flows[flow].count = 0;
}
if (pkt_dev->cflows)
flow = f_pick(pkt_dev);
/* Deal with source MAC */
if (pkt_dev->src_mac_count > 1) {
@ -2213,7 +2256,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
pkt_dev->cur_saddr = htonl(t);
}
if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
} else {
imn = ntohl(pkt_dev->daddr_min);
@ -2243,6 +2286,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
}
}
if (pkt_dev->cflows) {
pkt_dev->flows[flow].flags |= F_INIT;
pkt_dev->flows[flow].cur_daddr =
pkt_dev->cur_daddr;
pkt_dev->nflows++;