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authorSurjit Reang <surjit.reang@neterion.com>2008-02-03 15:27:38 +0300
committerDavid S. Miller <davem@davemloft.net>2008-02-03 15:27:38 +0300
commitc88559539bd16eae4e9056d4734b3fe8a9858c45 (patch)
treea90ea2bc129d9e4d944f49fd669ab36c98a9f15d /drivers/net
parent03157ac31eb4a8883382a212b161d2e6c5059fbf (diff)
downloadlinux-c88559539bd16eae4e9056d4734b3fe8a9858c45.tar.xz
S2io: Fix for LRO Bugs
Resubmitting patch from Al Viro <viro@zeniv.linux.org.uk>, with subject - [PATCH] s2io LRO bugs. a) initiate_new_session() sets ->tcp_ack to ntohl(...); everything else stores and expects to find there the net-endian value. b) check for monotonic timestamps in verify_l3_l4_lro_capable() compares the value sitting in TCP option (right there in the skb->data, net-endian 32bit) with the value picked from earlier packet. Doing that without ntohl() is an interesting idea and it might even work occasionally; unfortunately, it's quite broken. Signed-off-by: Surjit Reang <surjit.reang@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/s2io.c20
-rw-r--r--drivers/net/s2io.h2
2 files changed, 11 insertions, 11 deletions
diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index 5fab7d7b5d74..6179a0a2032c 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -8118,7 +8118,7 @@ static void initiate_new_session(struct lro *lro, u8 *l2h,
lro->iph = ip;
lro->tcph = tcp;
lro->tcp_next_seq = tcp_pyld_len + ntohl(tcp->seq);
- lro->tcp_ack = ntohl(tcp->ack_seq);
+ lro->tcp_ack = tcp->ack_seq;
lro->sg_num = 1;
lro->total_len = ntohs(ip->tot_len);
lro->frags_len = 0;
@@ -8127,10 +8127,10 @@ static void initiate_new_session(struct lro *lro, u8 *l2h,
* already been done.
*/
if (tcp->doff == 8) {
- u32 *ptr;
- ptr = (u32 *)(tcp+1);
+ __be32 *ptr;
+ ptr = (__be32 *)(tcp+1);
lro->saw_ts = 1;
- lro->cur_tsval = *(ptr+1);
+ lro->cur_tsval = ntohl(*(ptr+1));
lro->cur_tsecr = *(ptr+2);
}
lro->in_use = 1;
@@ -8156,7 +8156,7 @@ static void update_L3L4_header(struct s2io_nic *sp, struct lro *lro)
/* Update tsecr field if this session has timestamps enabled */
if (lro->saw_ts) {
- u32 *ptr = (u32 *)(tcp + 1);
+ __be32 *ptr = (__be32 *)(tcp + 1);
*(ptr+2) = lro->cur_tsecr;
}
@@ -8181,10 +8181,10 @@ static void aggregate_new_rx(struct lro *lro, struct iphdr *ip,
lro->window = tcp->window;
if (lro->saw_ts) {
- u32 *ptr;
+ __be32 *ptr;
/* Update tsecr and tsval from this packet */
- ptr = (u32 *) (tcp + 1);
- lro->cur_tsval = *(ptr + 1);
+ ptr = (__be32 *)(tcp+1);
+ lro->cur_tsval = ntohl(*(ptr+1));
lro->cur_tsecr = *(ptr + 2);
}
}
@@ -8235,11 +8235,11 @@ static int verify_l3_l4_lro_capable(struct lro *l_lro, struct iphdr *ip,
/* Ensure timestamp value increases monotonically */
if (l_lro)
- if (l_lro->cur_tsval > *((u32 *)(ptr+2)))
+ if (l_lro->cur_tsval > ntohl(*((__be32 *)(ptr+2))))
return -1;
/* timestamp echo reply should be non-zero */
- if (*((u32 *)(ptr+6)) == 0)
+ if (*((__be32 *)(ptr+6)) == 0)
return -1;
}
diff --git a/drivers/net/s2io.h b/drivers/net/s2io.h
index 9f6016c6f135..64b88eb48287 100644
--- a/drivers/net/s2io.h
+++ b/drivers/net/s2io.h
@@ -809,7 +809,7 @@ struct lro {
int in_use;
__be16 window;
u32 cur_tsval;
- u32 cur_tsecr;
+ __be32 cur_tsecr;
u8 saw_ts;
};