[NET] sem2mutex: net/
[linux-2.6.git] / net / core / flow.c
index f289570..55789f8 100644 (file)
 #include <linux/notifier.h>
 #include <linux/cpu.h>
 #include <linux/cpumask.h>
+#include <linux/mutex.h>
 #include <net/flow.h>
 #include <asm/atomic.h>
 #include <asm/semaphore.h>
+#include <linux/security.h>
 
 struct flow_cache_entry {
        struct flow_cache_entry *next;
@@ -30,6 +32,7 @@ struct flow_cache_entry {
        u8                      dir;
        struct flowi            key;
        u32                     genid;
+       u32                     sk_sid;
        void                    *object;
        atomic_t                *object_ref;
 };
@@ -42,7 +45,7 @@ static DEFINE_PER_CPU(struct flow_cache_entry **, flow_tables) = { NULL };
 
 #define flow_table(cpu) (per_cpu(flow_tables, cpu))
 
-static kmem_cache_t *flow_cachep;
+static kmem_cache_t *flow_cachep __read_mostly;
 
 static int flow_lwm, flow_hwm;
 
@@ -162,7 +165,7 @@ static int flow_key_compare(struct flowi *key1, struct flowi *key2)
        return 0;
 }
 
-void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
+void *flow_cache_lookup(struct flowi *key, u32 sk_sid, u16 family, u8 dir,
                        flow_resolve_t resolver)
 {
        struct flow_cache_entry *fle, **head;
@@ -186,6 +189,7 @@ void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
        for (fle = *head; fle; fle = fle->next) {
                if (fle->family == family &&
                    fle->dir == dir &&
+                   fle->sk_sid == sk_sid &&
                    flow_key_compare(key, &fle->key) == 0) {
                        if (fle->genid == atomic_read(&flow_cache_genid)) {
                                void *ret = fle->object;
@@ -210,6 +214,7 @@ void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
                        *head = fle;
                        fle->family = family;
                        fle->dir = dir;
+                       fle->sk_sid = sk_sid;
                        memcpy(&fle->key, key, sizeof(*key));
                        fle->object = NULL;
                        flow_count(cpu)++;
@@ -221,7 +226,7 @@ nocache:
                void *obj;
                atomic_t *obj_ref;
 
-               resolver(key, family, dir, &obj, &obj_ref);
+               resolver(key, sk_sid, family, dir, &obj, &obj_ref);
 
                if (fle) {
                        fle->genid = atomic_read(&flow_cache_genid);
@@ -283,11 +288,11 @@ static void flow_cache_flush_per_cpu(void *data)
 void flow_cache_flush(void)
 {
        struct flow_flush_info info;
-       static DECLARE_MUTEX(flow_flush_sem);
+       static DEFINE_MUTEX(flow_flush_sem);
 
        /* Don't want cpus going down or up during this. */
        lock_cpu_hotplug();
-       down(&flow_flush_sem);
+       mutex_lock(&flow_flush_sem);
        atomic_set(&info.cpuleft, num_online_cpus());
        init_completion(&info.completion);
 
@@ -297,7 +302,7 @@ void flow_cache_flush(void)
        local_bh_enable();
 
        wait_for_completion(&info.completion);
-       up(&flow_flush_sem);
+       mutex_unlock(&flow_flush_sem);
        unlock_cpu_hotplug();
 }