[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH net V2] Xen-netback: Fix issue caused by using gso_type wrongly
> -----Original Message----- > From: Annie Li [mailto:Annie.li@xxxxxxxxxx] > Sent: 10 March 2014 14:59 > To: xen-devel@xxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx > Cc: konrad.wilk@xxxxxxxxxx; Ian Campbell; Wei Liu; Paul Durrant; > annie.li@xxxxxxxxxx > Subject: [PATCH net V2] Xen-netback: Fix issue caused by using gso_type > wrongly > > From: Annie Li <annie.li@xxxxxxxxxx> > > Current netback uses gso_type to check whether the skb contains > gso offload, and this is wrong. Gso_size is the right one to > check gso existence, and gso_type is only used to check gso type. > > Some skbs contains nonzero gso_type and zero gso_size, current > netback would treat these skbs as gso and create wrong response > for this. This also causes ssh failure to domu from other server. > > V2: use skb_is_gso function as Paul Durrant suggested > > Signed-off-by: Annie Li <annie.li@xxxxxxxxxx> Reviewed-by: Paul Durrant <paul.durrant@xxxxxxxxxx> > --- > drivers/net/xen-netback/netback.c | 39 +++++++++++++++++--------------- > ---- > 1 files changed, 18 insertions(+), 21 deletions(-) > > diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen- > netback/netback.c > index e5284bc..438d0c0 100644 > --- a/drivers/net/xen-netback/netback.c > +++ b/drivers/net/xen-netback/netback.c > @@ -240,7 +240,7 @@ static void xenvif_gop_frag_copy(struct xenvif *vif, > struct sk_buff *skb, > struct gnttab_copy *copy_gop; > struct xenvif_rx_meta *meta; > unsigned long bytes; > - int gso_type; > + int gso_type = XEN_NETIF_GSO_TYPE_NONE; > > /* Data must not cross a page boundary. */ > BUG_ON(size + offset > PAGE_SIZE<<compound_order(page)); > @@ -299,12 +299,12 @@ static void xenvif_gop_frag_copy(struct xenvif *vif, > struct sk_buff *skb, > } > > /* Leave a gap for the GSO descriptor. */ > - if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) > - gso_type = XEN_NETIF_GSO_TYPE_TCPV4; > - else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) > - gso_type = XEN_NETIF_GSO_TYPE_TCPV6; > - else > - gso_type = XEN_NETIF_GSO_TYPE_NONE; > + if (skb_is_gso(skb)) { > + if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) > + gso_type = XEN_NETIF_GSO_TYPE_TCPV4; > + else if (skb_shinfo(skb)->gso_type & > SKB_GSO_TCPV6) > + gso_type = XEN_NETIF_GSO_TYPE_TCPV6; > + } > > if (*head && ((1 << gso_type) & vif->gso_mask)) > vif->rx.req_cons++; > @@ -338,19 +338,15 @@ static int xenvif_gop_skb(struct sk_buff *skb, > int head = 1; > int old_meta_prod; > int gso_type; > - int gso_size; > > old_meta_prod = npo->meta_prod; > > - if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) { > - gso_type = XEN_NETIF_GSO_TYPE_TCPV4; > - gso_size = skb_shinfo(skb)->gso_size; > - } else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) { > - gso_type = XEN_NETIF_GSO_TYPE_TCPV6; > - gso_size = skb_shinfo(skb)->gso_size; > - } else { > - gso_type = XEN_NETIF_GSO_TYPE_NONE; > - gso_size = 0; > + gso_type = XEN_NETIF_GSO_TYPE_NONE; > + if (skb_is_gso(skb)) { > + if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) > + gso_type = XEN_NETIF_GSO_TYPE_TCPV4; > + else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) > + gso_type = XEN_NETIF_GSO_TYPE_TCPV6; > } > > /* Set up a GSO prefix descriptor, if necessary */ > @@ -358,7 +354,7 @@ static int xenvif_gop_skb(struct sk_buff *skb, > req = RING_GET_REQUEST(&vif->rx, vif->rx.req_cons++); > meta = npo->meta + npo->meta_prod++; > meta->gso_type = gso_type; > - meta->gso_size = gso_size; > + meta->gso_size = skb_shinfo(skb)->gso_size; > meta->size = 0; > meta->id = req->id; > } > @@ -368,7 +364,7 @@ static int xenvif_gop_skb(struct sk_buff *skb, > > if ((1 << gso_type) & vif->gso_mask) { > meta->gso_type = gso_type; > - meta->gso_size = gso_size; > + meta->gso_size = skb_shinfo(skb)->gso_size; > } else { > meta->gso_type = XEN_NETIF_GSO_TYPE_NONE; > meta->gso_size = 0; > @@ -500,8 +496,9 @@ static void xenvif_rx_action(struct xenvif *vif) > size = skb_frag_size(&skb_shinfo(skb)->frags[i]); > max_slots_needed += DIV_ROUND_UP(size, > PAGE_SIZE); > } > - if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4 || > - skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) > + if (skb_is_gso(skb) && > + (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4 || > + skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)) > max_slots_needed++; > > /* If the skb may not fit then bail out now */ > -- > 1.7.3.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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