pktgen: create num frags requested
Pktgen doesn't generate number of frags requested.
Divide packet size by number of frags and fill that in every frags.
Example:
With packet size 1470, it generate only 11 frags. Initial frags
get lenght 706, 353, 177....so on. Last frag get divided by 2.
Now with this fix, each frags will get 78 bytes.
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 2fa6fee..ff79d94 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -2622,6 +2622,7 @@
} else {
int frags = pkt_dev->nfrags;
int i, len;
+ int frag_len;
if (frags > MAX_SKB_FRAGS)
@@ -2633,6 +2634,8 @@
}
i = 0;
+ frag_len = (datalen/frags) < PAGE_SIZE ?
+ (datalen/frags) : PAGE_SIZE;
while (datalen > 0) {
if (unlikely(!pkt_dev->page)) {
int node = numa_node_id();
@@ -2646,38 +2649,18 @@
skb_shinfo(skb)->frags[i].page = pkt_dev->page;
get_page(pkt_dev->page);
skb_shinfo(skb)->frags[i].page_offset = 0;
- skb_shinfo(skb)->frags[i].size =
- (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
+ /*last fragment, fill rest of data*/
+ if (i == (frags - 1))
+ skb_shinfo(skb)->frags[i].size =
+ (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
+ else
+ skb_shinfo(skb)->frags[i].size = frag_len;
datalen -= skb_shinfo(skb)->frags[i].size;
skb->len += skb_shinfo(skb)->frags[i].size;
skb->data_len += skb_shinfo(skb)->frags[i].size;
i++;
skb_shinfo(skb)->nr_frags = i;
}
-
- while (i < frags) {
- int rem;
-
- if (i == 0)
- break;
-
- rem = skb_shinfo(skb)->frags[i - 1].size / 2;
- if (rem == 0)
- break;
-
- skb_shinfo(skb)->frags[i - 1].size -= rem;
-
- skb_shinfo(skb)->frags[i] =
- skb_shinfo(skb)->frags[i - 1];
- get_page(skb_shinfo(skb)->frags[i].page);
- skb_shinfo(skb)->frags[i].page =
- skb_shinfo(skb)->frags[i - 1].page;
- skb_shinfo(skb)->frags[i].page_offset +=
- skb_shinfo(skb)->frags[i - 1].size;
- skb_shinfo(skb)->frags[i].size = rem;
- i++;
- skb_shinfo(skb)->nr_frags = i;
- }
}
/* Stamp the time, and sequence number,