learning-switch: Add support for OpenFlow queues.

[openvswitch] / datapath / datapath.c

diff --git a/datapath/datapath.c b/datapath/datapath.c
index 8991e35497847ee1e84e2546c33b631fb63a2aeb..eb260e33ab2c8d6b02b57d10adf30551a91c2a4e 100644 (file)
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -656,8 +656,7 @@ out:
  * 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. */
-void
-compute_ip_summed(struct sk_buff *skb, bool xmit)
+void compute_ip_summed(struct sk_buff *skb, bool xmit)
 {
        /* For our convenience these defines change repeatedly between kernel
         * versions, so we can't just copy them over... */
@@ -714,8 +713,7 @@ compute_ip_summed(struct sk_buff *skb, bool xmit)
  * 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)
+void forward_ip_summed(struct sk_buff *skb)
 {
 #ifdef CHECKSUM_HW
        if (OVS_CB(skb)->ip_summed == OVS_CSUM_COMPLETE)
@@ -725,9 +723,8 @@ forward_ip_summed(struct sk_buff *skb)
 
 /* Append each packet in 'skb' list to 'queue'.  There will be only one packet
  * unless we broke up a GSO packet. */
-static int
-queue_control_packets(struct sk_buff *skb, struct sk_buff_head *queue,
-                     int queue_no, u32 arg)
+static int queue_control_packets(struct sk_buff *skb, struct sk_buff_head *queue,
+                                int queue_no, u32 arg)
 {
        struct sk_buff *nskb;
        int port_no;
@@ -769,9 +766,8 @@ err_kfree_skbs:
        return err;
 }
 
-int
-dp_output_control(struct datapath *dp, struct sk_buff *skb, int queue_no,
-                 u32 arg)
+int dp_output_control(struct datapath *dp, struct sk_buff *skb, int queue_no,
+                     u32 arg)
 {
        struct dp_stats_percpu *stats;
        struct sk_buff_head *queue;
@@ -1379,8 +1375,7 @@ void set_internal_devs_mtu(const struct datapath *dp)
        }
 }
 
-static int
-put_port(const struct dp_port *p, struct odp_port __user *uop)
+static int put_port(const struct dp_port *p, struct odp_port __user *uop)
 {
        struct odp_port op;
 
@@ -1396,8 +1391,7 @@ put_port(const struct dp_port *p, struct odp_port __user *uop)
        return copy_to_user(uop, &op, sizeof op) ? -EFAULT : 0;
 }
 
-static int
-query_port(struct datapath *dp, struct odp_port __user *uport)
+static int query_port(struct datapath *dp, struct odp_port __user *uport)
 {
        struct odp_port port;
 
@@ -1444,8 +1438,8 @@ error_unlock:
        return put_port(dp->ports[port.port], uport);
 }
 
-static int
-do_list_ports(struct datapath *dp, struct odp_port __user *uports, int n_ports)
+static int do_list_ports(struct datapath *dp, struct odp_port __user *uports,
+                        int n_ports)
 {
        int idx = 0;
        if (n_ports) {
@@ -1461,8 +1455,7 @@ do_list_ports(struct datapath *dp, struct odp_port __user *uports, int n_ports)
        return idx;
 }
 
-static int
-list_ports(struct datapath *dp, struct odp_portvec __user *upv)
+static int list_ports(struct datapath *dp, struct odp_portvec __user *upv)
 {
        struct odp_portvec pv;
        int retval;
@@ -1484,8 +1477,8 @@ static void free_port_group(struct rcu_head *rcu)
        kfree(g);
 }
 
-static int
-do_set_port_group(struct datapath *dp, u16 __user *ports, int n_ports, int group)
+static int do_set_port_group(struct datapath *dp, u16 __user *ports,
+                            int n_ports, int group)
 {
        struct dp_port_group *new_group, *old_group;
        int error;
@@ -1516,8 +1509,8 @@ error:
        return error;
 }
 
-static int
-set_port_group(struct datapath *dp, const struct odp_port_group __user *upg)
+static int set_port_group(struct datapath *dp,
+                         const struct odp_port_group __user *upg)
 {
        struct odp_port_group pg;
 
@@ -1527,10 +1520,9 @@ set_port_group(struct datapath *dp, const struct odp_port_group __user *upg)
        return do_set_port_group(dp, pg.ports, pg.n_ports, pg.group);
 }
 
-static int
-do_get_port_group(struct datapath *dp,
-                 u16 __user *ports, int n_ports, int group,
-                 u16 __user *n_portsp)
+static int do_get_port_group(struct datapath *dp,
+                            u16 __user *ports, int n_ports, int group,
+                            u16 __user *n_portsp)
 {
        struct dp_port_group *g;
        u16 n_copy;
@@ -2193,21 +2185,16 @@ success:
        if (skb->ip_summed == CHECKSUM_PARTIAL) {
                if (copy_bytes == skb->len) {
                        __wsum csum = 0;
-                       int csum_start, csum_offset;
+                       unsigned int csum_start, csum_offset;
 
 #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
-                        * 2.6.22 introduced the csum_start field for this
-                        * purpose, but we should point the transport header to
-                        * it anyway for backward compatibility, as
-                        * dev_queue_xmit() does even in 2.6.28. */
-                       skb_set_transport_header(skb, skb->csum_start - skb_headroom(skb));
+                       csum_start = skb->csum_start - skb_headroom(skb);
                        csum_offset = skb->csum_offset;
 #else
+                       csum_start = skb_transport_header(skb) - skb->data;
                        csum_offset = skb->csum;
 #endif
-                       csum_start = skb_transport_header(skb) - skb->data;
+                       BUG_ON(csum_start >= skb_headlen(skb));
                        retval = skb_copy_and_csum_datagram(skb, csum_start, buf + csum_start,
                                                            copy_bytes - csum_start, &csum);
                        if (!retval) {
@@ -2215,6 +2202,8 @@ success:
 
                                copy_bytes = csum_start;
                                csump = (__sum16 __user *)(buf + csum_start + csum_offset);
+
+                               BUG_ON((char *)csump + sizeof(__sum16) > buf + nbytes);
                                put_user(csum_fold(csum), csump);
                        }
                } else