int i;
if (devnamep) {
- err = -EFAULT;
- if (strncpy_from_user(devname, devnamep, IFNAMSIZ - 1) < 0)
+ int retval = strncpy_from_user(devname, devnamep, IFNAMSIZ);
+ if (retval < 0) {
+ err = -EFAULT;
goto err;
- devname[IFNAMSIZ - 1] = '\0';
+ } else if (retval >= IFNAMSIZ) {
+ err = -ENAMETOOLONG;
+ goto err;
+ }
} else {
snprintf(devname, sizeof devname, "of%d", dp_idx);
}
goto err_free_dp;
/* Set up our datapath device. */
- strncpy(internal_dev_port.devname, devname, IFNAMSIZ - 1);
+ BUILD_BUG_ON(sizeof(internal_dev_port.devname) != sizeof(devname));
+ strcpy(internal_dev_port.devname, devname);
internal_dev_port.flags = ODP_PORT_INTERNAL;
err = new_dp_port(dp, &internal_dev_port, ODPP_LOCAL);
if (err) {
if (err)
goto out_unlock_dp;
- if (!(port.flags & ODP_PORT_INTERNAL))
- set_internal_devs_mtu(dp);
+ set_internal_devs_mtu(dp);
dp_sysfs_add_if(dp->ports[port_no]);
err = __put_user(port_no, &portp->port);
skb_warn_if_lro(skb);
OVS_CB(skb)->dp_port = p;
- compute_ip_summed(skb, false);
/* BHs are off so we don't have to use get_cpu()/put_cpu() here. */
stats = percpu_ptr(dp->stats_percpu, smp_processor_id());
}
#if defined(CONFIG_XEN) && defined(HAVE_PROTO_DATA_VALID)
-/* This code is based on a skb_checksum_setup from net/dev/core.c from a
- * combination of Lenny's 2.6.26 Xen kernel and Xen's
- * linux-2.6.18-92.1.10.el5.xs5.0.0.394.644. We can't call this function
- * directly because it isn't exported in all versions. */
-static int skb_pull_up_to(struct sk_buff *skb, void *ptr)
-{
- if (ptr < (void *)skb->tail)
- return 1;
- if (__pskb_pull_tail(skb,
- ptr - (void *)skb->data - skb_headlen(skb))) {
- return 1;
- } else {
- return 0;
- }
-}
-
+/* This code is based on skb_checksum_setup() from Xen's net/dev/core.c. We
+ * can't call this function directly because it isn't exported in all
+ * versions. */
int vswitch_skb_checksum_setup(struct sk_buff *skb)
{
struct iphdr *iph;
if (skb->protocol != htons(ETH_P_IP))
goto out;
- if (!skb_pull_up_to(skb, skb_network_header(skb) + sizeof(struct iphdr)))
+ if (!pskb_may_pull(skb, skb_network_header(skb) + sizeof(struct iphdr) - skb->data))
goto out;
iph = ip_hdr(skb);
goto out;
}
- if (!skb_pull_up_to(skb, th + csum_offset + 2))
+ if (!pskb_may_pull(skb, th + csum_offset + 2 - skb->data))
goto out;
skb->ip_summed = CHECKSUM_PARTIAL;
* be computed if it is sent off box. Unfortunately on earlier kernels,
* this case is impossible to distinguish from #2, despite having opposite
* meanings. Xen adds an extra field on earlier kernels (see #4) in order
- * to distinguish the different states. The only real user of this type
- * with bridging is Xen (on later kernels).
+ * to distinguish the different states.
* 4. CHECKSUM_UNNECESSARY (with proto_csum_blank true): This packet was
* generated locally by a Xen DomU and has a partial checksum. If it is
* handled on this machine (Dom0 or DomU), then the checksum will not be
* packet is processed by the local IP stack, in which case it will need to
* be reverified). If we receive a packet with CHECKSUM_HW that really means
* CHECKSUM_PARTIAL, it will be sent with the wrong checksum. However, there
- * shouldn't be any devices that do this with bridging.
- *
- * The bridge has similar behavior and this function closely resembles
- * skb_forward_csum(). It is slightly different because we are only concerned
- * with bridging and not other types of forwarding and can get away with
- * slightly more optimal behavior.*/
+ * shouldn't be any devices that do this with bridging. */
void
compute_ip_summed(struct sk_buff *skb, bool xmit)
{
break;
#ifdef CHECKSUM_HW
/* In theory this could be either CHECKSUM_PARTIAL or CHECKSUM_COMPLETE.
- * However, we should only get CHECKSUM_PARTIAL packets from Xen, which
- * uses some special fields to represent this (see below). Since we
- * can only make one type work, pick the one that actually happens in
- * practice.
+ * However, on the receive side we should only get CHECKSUM_PARTIAL
+ * packets from Xen, which uses some special fields to represent this
+ * (see below). Since we can only make one type work, pick the one
+ * that actually happens in practice.
*
- * The one exception to this is if we are on the transmit path
- * (basically after skb_checksum_setup() has been run) the type has
- * already been converted, so we should stay with that. */
+ * On the transmit side (basically after skb_checksum_setup()
+ * has been run or on internal dev transmit), packets with
+ * CHECKSUM_COMPLETE aren't generated, so assume CHECKSUM_PARTIAL. */
case CHECKSUM_HW:
if (!xmit)
OVS_CB(skb)->ip_summed = OVS_CSUM_COMPLETE;
#endif
}
+/* This function closely resembles skb_forward_csum() used by the bridge. It
+ * is slightly different because we are only concerned with bridging and not
+ * other types of forwarding and can get away with slightly more optimal
+ * behavior.*/
void
forward_ip_summed(struct sk_buff *skb)
{
skb->next = NULL;
/* If a checksum-deferred packet is forwarded to the
- * controller, correct the pointers and checksum. This happens
- * on a regular basis only on Xen, on which VMs can pass up
- * packets that do not have their checksum computed.
+ * controller, correct the pointers and checksum.
*/
err = vswitch_skb_checksum_setup(skb);
if (err)
goto err_kfree_skbs;
-#ifndef CHECKSUM_HW
+
if (skb->ip_summed == CHECKSUM_PARTIAL) {
+
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
/* Until 2.6.22, the start of the transport header was
* also the start of data to be checksummed. Linux
skb_set_transport_header(skb, skb->csum_start -
skb_headroom(skb));
#endif
+
err = skb_checksum_help(skb);
if (err)
goto err_kfree_skbs;
}
-#else
- if (skb->ip_summed == CHECKSUM_HW) {
- err = skb_checksum_help(skb, 0);
- if (err)
- goto err_kfree_skbs;
- }
-#endif
err = skb_cow(skb, sizeof *header);
if (err)
static int query_flows(struct datapath *dp, const struct odp_flowvec *flowvec)
{
struct tbl *table = rcu_dereference(dp->table);
- int i;
+ u32 i;
+
for (i = 0; i < flowvec->n_flows; i++) {
struct __user odp_flow *ufp = &flowvec->flows[i];
struct odp_flow uf;
struct list_flows_cbdata {
struct odp_flow __user *uflows;
- int n_flows;
- int listed_flows;
+ u32 n_flows;
+ u32 listed_flows;
};
static int list_flow(struct tbl_node *node, void *cbdata_)
}
/* Sets the MTU of all datapath devices to the minimum of the ports. Must
- * be called with RTNL lock and dp_mutex. */
+ * be called with RTNL lock. */
void set_internal_devs_mtu(const struct datapath *dp)
{
struct dp_port *p;
projects / openvswitch / blobdiff