/* Functions for managing the dp interface/device. */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/udp.h>
#include <linux/version.h>
#include <linux/ethtool.h>
-#include <linux/random.h>
#include <linux/wait.h>
#include <asm/system.h>
#include <asm/div64.h>
#include <linux/inetdevice.h>
#include <linux/list.h>
#include <linux/rculist.h>
-#include <linux/workqueue.h>
#include <linux/dmi.h>
#include <net/inet_ecn.h>
#include <linux/compat.h>
static void suppress_loop(struct datapath *dp, struct sw_flow_actions *actions)
{
if (net_ratelimit())
- printk(KERN_WARNING "%s: flow looped %d times, dropping\n",
- dp_name(dp), DP_MAX_LOOPS);
+ pr_warn("%s: flow looped %d times, dropping\n",
+ dp_name(dp), DP_MAX_LOOPS);
actions->n_actions = 0;
}
struct datapath *dp = p->dp;
struct dp_stats_percpu *stats;
int stats_counter_off;
- struct odp_flow_key key;
- struct tbl_node *flow_node;
- struct sw_flow *flow;
struct sw_flow_actions *acts;
struct loop_counter *loop;
int error;
OVS_CB(skb)->dp_port = p;
- /* Extract flow from 'skb' into 'key'. */
- error = flow_extract(skb, p ? p->port_no : ODPP_NONE, &key);
- if (unlikely(error)) {
- kfree_skb(skb);
- return;
- }
+ if (!OVS_CB(skb)->flow) {
+ struct odp_flow_key key;
+ struct tbl_node *flow_node;
+ bool is_frag;
- if (OVS_CB(skb)->is_frag && dp->drop_frags) {
- kfree_skb(skb);
- stats_counter_off = offsetof(struct dp_stats_percpu, n_frags);
- goto out;
- }
+ /* Extract flow from 'skb' into 'key'. */
+ error = flow_extract(skb, p ? p->port_no : ODPP_NONE, &key, &is_frag);
+ if (unlikely(error)) {
+ kfree_skb(skb);
+ return;
+ }
- /* Look up flow. */
- flow_node = tbl_lookup(rcu_dereference(dp->table), &key, flow_hash(&key), flow_cmp);
- if (unlikely(!flow_node)) {
- dp_output_control(dp, skb, _ODPL_MISS_NR, OVS_CB(skb)->tun_id);
- stats_counter_off = offsetof(struct dp_stats_percpu, n_missed);
- goto out;
+ if (is_frag && dp->drop_frags) {
+ kfree_skb(skb);
+ stats_counter_off = offsetof(struct dp_stats_percpu, n_frags);
+ goto out;
+ }
+
+ /* Look up flow. */
+ flow_node = tbl_lookup(rcu_dereference(dp->table), &key,
+ flow_hash(&key), flow_cmp);
+ if (unlikely(!flow_node)) {
+ dp_output_control(dp, skb, _ODPL_MISS_NR, OVS_CB(skb)->tun_id);
+ stats_counter_off = offsetof(struct dp_stats_percpu, n_missed);
+ goto out;
+ }
+
+ OVS_CB(skb)->flow = flow_cast(flow_node);
}
- flow = flow_cast(flow_node);
- flow_used(flow, skb);
+ flow_used(OVS_CB(skb)->flow, skb);
- acts = rcu_dereference(flow->sf_acts);
+ acts = rcu_dereference(OVS_CB(skb)->flow->sf_acts);
/* Check whether we've looped too much. */
loop = &get_cpu_var(dp_loop_counters).counters[!!in_interrupt()];
}
/* Execute actions. */
- execute_actions(dp, skb, &key, acts->actions, acts->n_actions, GFP_ATOMIC);
+ execute_actions(dp, skb, &OVS_CB(skb)->flow->key, acts->actions,
+ acts->n_actions, GFP_ATOMIC);
stats_counter_off = offsetof(struct dp_stats_percpu, n_hit);
/* Check whether sub-actions looped too much. */
break;
default:
if (net_ratelimit())
- printk(KERN_ERR "Attempting to checksum a non-"
- "TCP/UDP packet, dropping a protocol"
- " %d packet", iph->protocol);
+ pr_err("Attempting to checksum a non-TCP/UDP packet, "
+ "dropping a protocol %d packet",
+ iph->protocol);
goto out;
}
break;
#endif
default:
- printk(KERN_ERR "openvswitch: unknown checksum type %d\n",
- skb->ip_summed);
+ pr_err("unknown checksum type %d\n", skb->ip_summed);
/* None seems the safest... */
OVS_CB(skb)->ip_summed = OVS_CSUM_NONE;
- }
+ }
#if defined(CONFIG_XEN) && defined(HAVE_PROTO_DATA_VALID)
/* Xen has a special way of representing CHECKSUM_PARTIAL on older
}
/* Allocate flow. */
- error = -ENOMEM;
- flow = kmem_cache_alloc(flow_cache, GFP_KERNEL);
- if (flow == NULL)
+ flow = flow_alloc();
+ if (IS_ERR(flow)) {
+ error = PTR_ERR(flow);
goto error;
+ }
flow->key = uf->flow.key;
- spin_lock_init(&flow->lock);
clear_stats(flow);
/* Obtain actions. */
error_free_flow_acts:
kfree(flow->sf_acts);
error_free_flow:
- kmem_cache_free(flow_cache, flow);
+ flow->sf_acts = NULL;
+ flow_put(flow);
error:
return error;
}
struct sk_buff *skb;
struct sw_flow_actions *actions;
struct ethhdr *eth;
+ bool is_frag;
int err;
err = -EINVAL;
if (execute->length < ETH_HLEN || execute->length > 65535)
goto error;
- err = -ENOMEM;
actions = flow_actions_alloc(execute->n_actions);
- if (!actions)
+ if (IS_ERR(actions)) {
+ err = PTR_ERR(actions);
goto error;
+ }
err = -EFAULT;
if (copy_from_user(actions->actions, execute->actions,
else
skb->protocol = htons(ETH_P_802_2);
- err = flow_extract(skb, execute->in_port, &key);
+ err = flow_extract(skb, execute->in_port, &key, &is_frag);
if (err)
goto error_free_skb;
}
success:
copy_bytes = tot_copy_bytes = min_t(size_t, skb->len, nbytes);
-
+
retval = 0;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
if (copy_bytes == skb->len) {