Commit c8855953 authored by Surjit Reang's avatar Surjit Reang Committed by David S. Miller

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: default avatarSurjit Reang <surjit.reang@neterion.com>
Signed-off-by: default avatarRamkrishna Vepa <ram.vepa@neterion.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 03157ac3
......@@ -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;
}
......
......@@ -809,7 +809,7 @@ struct lro {
int in_use;
__be16 window;
u32 cur_tsval;
u32 cur_tsecr;
__be32 cur_tsecr;
u8 saw_ts;
};
......
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