Displaying 20 results from an estimated 145 matches for "csum_start".
2008 May 29
1
[PATCH 3/3] virtio_net: Fix skb->csum_start computation
On Tue, May 27, 2008 at 12:20:47PM +0100, Mark McLoughlin wrote:
> hdr->csum_start is the offset from the start of the ethernet
> header to the transport layer checksum field. skb->csum_start
> is the offset from skb->head.
>
> skb_partial_csum_set() assumes that skb->data points to the
> ethernet header - i.e. it computes skb->csum_start by adding
>...
2008 May 29
1
[PATCH 3/3] virtio_net: Fix skb->csum_start computation
On Tue, May 27, 2008 at 12:20:47PM +0100, Mark McLoughlin wrote:
> hdr->csum_start is the offset from the start of the ethernet
> header to the transport layer checksum field. skb->csum_start
> is the offset from skb->head.
>
> skb_partial_csum_set() assumes that skb->data points to the
> ethernet header - i.e. it computes skb->csum_start by adding
>...
2008 Jun 16
1
[PATCH] virtio_net: Fix skb->csum_start computation (2.6.24, 2.6.25)
From: Mark McLoughlin <markmc at redhat.com>
hdr->csum_start is the offset from the start of the ethernet
header to the transport layer checksum field. skb->csum_start
is the offset from skb->head.
skb_partial_csum_set() assumes that skb->data points to the
ethernet header - i.e. it computes skb->csum_start by adding
the headroom to hdr->csum...
2008 Jun 16
1
[PATCH] virtio_net: Fix skb->csum_start computation (2.6.24, 2.6.25)
From: Mark McLoughlin <markmc at redhat.com>
hdr->csum_start is the offset from the start of the ethernet
header to the transport layer checksum field. skb->csum_start
is the offset from skb->head.
skb_partial_csum_set() assumes that skb->data points to the
ethernet header - i.e. it computes skb->csum_start by adding
the headroom to hdr->csum...
2015 Sep 24
2
[PATCH v2] Fix AF_PACKET ABI breakage in 4.2
...cket_kbdq_core *)(&(x)->prb_bdqc))
> @@ -2680,15 +2682,15 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
> goto out_unlock;
>
> if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
> - (__virtio16_to_cpu(false, vnet_hdr.csum_start) +
> - __virtio16_to_cpu(false, vnet_hdr.csum_offset) + 2 >
> - __virtio16_to_cpu(false, vnet_hdr.hdr_len)))
> - vnet_hdr.hdr_len = __cpu_to_virtio16(false,
> - __virtio16_to_cpu(false, vnet_hdr.csum_start) +
> - __virtio16_to_cpu(false, vnet_hdr.csum_offset)...
2015 Sep 24
2
[PATCH v2] Fix AF_PACKET ABI breakage in 4.2
...cket_kbdq_core *)(&(x)->prb_bdqc))
> @@ -2680,15 +2682,15 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
> goto out_unlock;
>
> if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
> - (__virtio16_to_cpu(false, vnet_hdr.csum_start) +
> - __virtio16_to_cpu(false, vnet_hdr.csum_offset) + 2 >
> - __virtio16_to_cpu(false, vnet_hdr.hdr_len)))
> - vnet_hdr.hdr_len = __cpu_to_virtio16(false,
> - __virtio16_to_cpu(false, vnet_hdr.csum_start) +
> - __virtio16_to_cpu(false, vnet_hdr.csum_offset)...
2008 Jun 19
0
[patch 05/15] virtio_net: Fix skb->csum_start computation
2.6.25-stable review patch. If anyone has any objections, please let us
know.
------------------
From: Mark McLoughlin <markmc at redhat.com>
commit 23cde76d801246a702e7a84c3fe3d655b35c89a1 upstream.
hdr->csum_start is the offset from the start of the ethernet
header to the transport layer checksum field. skb->csum_start
is the offset from skb->head.
skb_partial_csum_set() assumes that skb->data points to the
ethernet header - i.e. it computes skb->csum_start by adding
the headroom to hdr->csum...
2020 Mar 01
1
[PATCH v2 1/3] virtio-net: Introduce extended RSC feature
...Benditovich wrote:
> VIRTIO_NET_F_RSC_EXT feature bit indicates that the device
> is able to provide extended RSC information. When the feature
> is negotiatede and 'gso_type' field in received packet is not
> GSO_NONE, the device reports number of coalesced packets in
> 'csum_start' field and number of duplicated acks in 'csum_offset'
> field and sets VIRTIO_NET_HDR_F_RSC_INFO in 'flags' field.
>
> Signed-off-by: Yuri Benditovich <yuri.benditovich at daynix.com>
> ---
> include/uapi/linux/virtio_net.h | 12 ++++++++++--
> 1 file c...
2008 Jun 08
2
[PATCH 1/4] virtio_net: Fix skb->csum_start computation
From: Mark McLoughlin <markmc at redhat.com>
hdr->csum_start is the offset from the start of the ethernet
header to the transport layer checksum field. skb->csum_start
is the offset from skb->head.
skb_partial_csum_set() assumes that skb->data points to the
ethernet header - i.e. it computes skb->csum_start by adding
the headroom to hdr->csum...
2008 Jan 15
2
[PATCH 1/3] skb_partial_csum_set
...up and verify partial csum values for packet
+ * @skb: the skb to set
+ * @start: the number of bytes after skb->data to start checksumming.
+ * @off: the offset from start to place the checksum.
+ *
+ * For untrusted partially-checksummed packets, we need to make sure the values
+ * for skb->csum_start and skb->csum_offset are valid so we don't oops.
+ *
+ * This function checks and sets those values and skb->ip_summed: if this
+ * returns false you should drop the packet.
+ */
+bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off)
+{
+ if (unlikely(start > skb->len -...
2008 Jan 15
2
[PATCH 1/3] skb_partial_csum_set
...up and verify partial csum values for packet
+ * @skb: the skb to set
+ * @start: the number of bytes after skb->data to start checksumming.
+ * @off: the offset from start to place the checksum.
+ *
+ * For untrusted partially-checksummed packets, we need to make sure the values
+ * for skb->csum_start and skb->csum_offset are valid so we don't oops.
+ *
+ * This function checks and sets those values and skb->ip_summed: if this
+ * returns false you should drop the packet.
+ */
+bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off)
+{
+ if (unlikely(start > skb->len -...
2014 Oct 23
0
[PATCH RFC] tun: fix sparse warnings for virtio headers
...un.c b/drivers/net/tun.c
index 186ce54..ee27ecb 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1043,10 +1043,10 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
return -EFAULT;
if ((gso.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
- gso.csum_start + gso.csum_offset + 2 > gso.hdr_len)
- gso.hdr_len = gso.csum_start + gso.csum_offset + 2;
+ __virtio16_to_cpu(false, gso.csum_start) + __virtio16_to_cpu(false, gso.csum_offset) + 2 > __virtio16_to_cpu(false, gso.hdr_len))
+ gso.hdr_len = __cpu_to_virtio16(false, __virtio16_to_cpu(fa...
2014 Oct 23
0
[PATCH RFC] tun: fix sparse warnings for virtio headers
...un.c b/drivers/net/tun.c
index 186ce54..ee27ecb 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1043,10 +1043,10 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
return -EFAULT;
if ((gso.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
- gso.csum_start + gso.csum_offset + 2 > gso.hdr_len)
- gso.hdr_len = gso.csum_start + gso.csum_offset + 2;
+ __virtio16_to_cpu(false, gso.csum_start) + __virtio16_to_cpu(false, gso.csum_offset) + 2 > __virtio16_to_cpu(false, gso.hdr_len))
+ gso.hdr_len = __cpu_to_virtio16(false, __virtio16_to_cpu(fa...
2011 Jun 10
1
[PATCH] virtio_net: introduce VIRTIO_NET_HDR_F_DATA_VALID
...-)
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index 6696e56..ecee0fe 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -508,6 +508,8 @@ static int macvtap_skb_to_vnet_hdr(const struct sk_buff *skb,
vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
vnet_hdr->csum_start = skb_checksum_start_offset(skb);
vnet_hdr->csum_offset = skb->csum_offset;
+ } else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
+ vnet_hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
return 0;
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
inde...
2011 Jun 10
1
[PATCH] virtio_net: introduce VIRTIO_NET_HDR_F_DATA_VALID
...-)
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index 6696e56..ecee0fe 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -508,6 +508,8 @@ static int macvtap_skb_to_vnet_hdr(const struct sk_buff *skb,
vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
vnet_hdr->csum_start = skb_checksum_start_offset(skb);
vnet_hdr->csum_offset = skb->csum_offset;
+ } else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
+ vnet_hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
return 0;
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
inde...
2015 Sep 24
1
[PATCH v2] Fix AF_PACKET ABI breakage in 4.2
...cket_kbdq_core *)(&(x)->prb_bdqc))
> @@ -2680,15 +2682,15 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
> goto out_unlock;
>
> if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
> - (__virtio16_to_cpu(false, vnet_hdr.csum_start) +
> - __virtio16_to_cpu(false, vnet_hdr.csum_offset) + 2 >
> - __virtio16_to_cpu(false, vnet_hdr.hdr_len)))
> - vnet_hdr.hdr_len = __cpu_to_virtio16(false,
> - __virtio16_to_cpu(false, vnet_hdr.csum_start) +
> - __virtio16_to_cpu(false, vnet_hdr.csum_offset)...
2015 Sep 24
1
[PATCH v2] Fix AF_PACKET ABI breakage in 4.2
...cket_kbdq_core *)(&(x)->prb_bdqc))
> @@ -2680,15 +2682,15 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
> goto out_unlock;
>
> if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
> - (__virtio16_to_cpu(false, vnet_hdr.csum_start) +
> - __virtio16_to_cpu(false, vnet_hdr.csum_offset) + 2 >
> - __virtio16_to_cpu(false, vnet_hdr.hdr_len)))
> - vnet_hdr.hdr_len = __cpu_to_virtio16(false,
> - __virtio16_to_cpu(false, vnet_hdr.csum_start) +
> - __virtio16_to_cpu(false, vnet_hdr.csum_offset)...
2015 Sep 24
0
[PATCH v2] Fix AF_PACKET ABI breakage in 4.2
...)->prb_bdqc))
> > @@ -2680,15 +2682,15 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
> > goto out_unlock;
> >
> > if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
> > - (__virtio16_to_cpu(false, vnet_hdr.csum_start) +
> > - __virtio16_to_cpu(false, vnet_hdr.csum_offset) + 2 >
> > - __virtio16_to_cpu(false, vnet_hdr.hdr_len)))
> > - vnet_hdr.hdr_len = __cpu_to_virtio16(false,
> > - __virtio16_to_cpu(false, vnet_hdr.csum_start) +
> > - __virtio16_to_cpu(fal...
2007 Jul 24
0
[PATCH] virtio_net.c gso & feature support
...skb(struct net_devic
ntohs(skb->protocol), skb->len, skb->pkt_type);
dev->stats.rx_bytes += skb->len;
dev->stats.rx_packets++;
+
+ if (hdr->flags & VIRTIO_NET_F_NEEDS_CSUM) {
+ pr_debug("Needs csum!\n");
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->csum_start = hdr->csum_start;
+ skb->csum_offset = hdr->csum_offset;
+ if (skb->csum_start > skb->len - 2
+ || skb->csum_offset > skb->len - 2) {
+ if (net_ratelimit())
+ printk(KERN_WARNING "%s: csum=%u/%u len=%u\n",
+ dev->name, skb->csum_star...
2007 Jul 24
0
[PATCH] virtio_net.c gso & feature support
...skb(struct net_devic
ntohs(skb->protocol), skb->len, skb->pkt_type);
dev->stats.rx_bytes += skb->len;
dev->stats.rx_packets++;
+
+ if (hdr->flags & VIRTIO_NET_F_NEEDS_CSUM) {
+ pr_debug("Needs csum!\n");
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->csum_start = hdr->csum_start;
+ skb->csum_offset = hdr->csum_offset;
+ if (skb->csum_start > skb->len - 2
+ || skb->csum_offset > skb->len - 2) {
+ if (net_ratelimit())
+ printk(KERN_WARNING "%s: csum=%u/%u len=%u\n",
+ dev->name, skb->csum_star...