Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / net / sched / cls_fw.c

diff --git a/net/sched/cls_fw.c b/net/sched/cls_fw.c
index fdfc83a..e6973d9 100644 (file)
--- a/net/sched/cls_fw.c
+++ b/net/sched/cls_fw.c
@@ -18,7 +18,6 @@
  *
  */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -46,9 +45,11 @@
 #include <net/act_api.h>
 #include <net/pkt_cls.h>
 
+#define HTSIZE (PAGE_SIZE/sizeof(struct fw_filter *))
+
 struct fw_head
 {
-       struct fw_filter *ht[256];
+       struct fw_filter *ht[HTSIZE];
 };
 
 struct fw_filter
@@ -69,7 +70,28 @@ static struct tcf_ext_map fw_ext_map = {
 
 static __inline__ int fw_hash(u32 handle)
 {
-       return handle&0xFF;
+       if (HTSIZE == 4096)
+               return ((handle >> 24) & 0xFFF) ^
+                      ((handle >> 12) & 0xFFF) ^
+                      (handle & 0xFFF);
+       else if (HTSIZE == 2048)
+               return ((handle >> 22) & 0x7FF) ^
+                      ((handle >> 11) & 0x7FF) ^
+                      (handle & 0x7FF);
+       else if (HTSIZE == 1024)
+               return ((handle >> 20) & 0x3FF) ^
+                      ((handle >> 10) & 0x3FF) ^
+                      (handle & 0x3FF);
+       else if (HTSIZE == 512)
+               return (handle >> 27) ^
+                      ((handle >> 18) & 0x1FF) ^
+                      ((handle >> 9) & 0x1FF) ^
+                      (handle & 0x1FF);
+       else if (HTSIZE == 256) {
+               u8 *t = (u8 *) &handle;
+               return t[0] ^ t[1] ^ t[2] ^ t[3];
+       } else 
+               return handle & (HTSIZE - 1);
 }
 
 static int fw_classify(struct sk_buff *skb, struct tcf_proto *tp,
@@ -152,7 +174,7 @@ static void fw_destroy(struct tcf_proto *tp)
        if (head == NULL)
                return;
 
-       for (h=0; h<256; h++) {
+       for (h=0; h<HTSIZE; h++) {
                while ((f=head->ht[h]) != NULL) {
                        head->ht[h] = f->next;
                        fw_delete_filter(tp, f);
@@ -245,20 +267,18 @@ static int fw_change(struct tcf_proto *tp, unsigned long base,
                return -EINVAL;
 
        if (head == NULL) {
-               head = kmalloc(sizeof(struct fw_head), GFP_KERNEL);
+               head = kzalloc(sizeof(struct fw_head), GFP_KERNEL);
                if (head == NULL)
                        return -ENOBUFS;
-               memset(head, 0, sizeof(*head));
 
                tcf_tree_lock(tp);
                tp->root = head;
                tcf_tree_unlock(tp);
        }
 
-       f = kmalloc(sizeof(struct fw_filter), GFP_KERNEL);
+       f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
        if (f == NULL)
                return -ENOBUFS;
-       memset(f, 0, sizeof(*f));
 
        f->id = handle;
 
@@ -275,8 +295,7 @@ static int fw_change(struct tcf_proto *tp, unsigned long base,
        return 0;
 
 errout:
-       if (f)
-               kfree(f);
+       kfree(f);
        return err;
 }
 
@@ -291,7 +310,7 @@ static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg)
        if (arg->stop)
                return;
 
-       for (h = 0; h < 256; h++) {
+       for (h = 0; h < HTSIZE; h++) {
                struct fw_filter *f;
 
                for (f = head->ht[h]; f; f = f->next) {