Changeset 062d900 in mainline for uspace/srv/fs/mfs/mfs_ops.c

Timestamp:

2012-10-09T11:49:43Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

4e00f87

Parents:

87e9392

git-author:

Adam Hraska <adam.hraska+hos@…> (2012-10-09 11:49:43)

git-committer:

Jakub Jermar <jakub@…> (2012-10-09 11:49:43)

Message:

Cherrypick userspace hash table changes from lp:~adam-hraska+lp/helenos/rcu/.

File:

• uspace/srv/fs/mfs/mfs_ops.c (modified) (9 diffs)

uspace/srv/fs/mfs/mfs_ops.c

@@ -35 +35 @@
 #include <align.h>
 #include <adt/hash_table.h>
+#include <adt/hash.h>
 #include "mfs.h"
 
-#define OPEN_NODES_KEYS 2
-#define OPEN_NODES_SERVICE_KEY 0
-#define OPEN_NODES_INODE_KEY 1
-#define OPEN_NODES_BUCKETS 256
 
 static bool check_magic_number(uint16_t magic, bool *native,
@@ -61 +58 @@
 static int mfs_unlink(fs_node_t *, fs_node_t *, const char *name);
 static int mfs_destroy_node(fs_node_t *fn);
-static hash_index_t open_nodes_hash(unsigned long key[]);
-static int open_nodes_compare(unsigned long key[], hash_count_t keys,
-    link_t *item);
-static void open_nodes_remove_cb(link_t *link);
 static int mfs_node_get(fs_node_t **rfn, service_id_t service_id,
     fs_index_t index);
@@ -95 +88 @@
 
 /* Hash table interface for open nodes hash table */
-static hash_index_t
-open_nodes_hash(unsigned long key[])
-{
-        /* TODO: This is very simple and probably can be improved */
-        return key[OPEN_NODES_INODE_KEY] % OPEN_NODES_BUCKETS;
-}
-
-static int
-open_nodes_compare(unsigned long key[], hash_count_t keys,
-    link_t *item)
-{
-        struct mfs_node *mnode = hash_table_get_instance(item, struct mfs_node, link);
-        assert(keys > 0);
-        if (mnode->instance->service_id !=
-            ((service_id_t) key[OPEN_NODES_SERVICE_KEY])) {
-                return false;
-        }
-        if (keys == 1) {
-                return true;
-        }
-        assert(keys == 2);
-        return (mnode->ino_i->index == key[OPEN_NODES_INODE_KEY]);
-}
-
-static void
-open_nodes_remove_cb(link_t *link)
-{
-        /* We don't use remove callback for this hash table */
-}
-
-static hash_table_operations_t open_nodes_ops = {
+
+typedef struct {
+        service_id_t service_id;
+        fs_index_t index;
+} node_key_t;
+
+static size_t
+open_nodes_key_hash(void *key)
+{
+        node_key_t *node_key = (node_key_t*)key;
+        return hash_combine(node_key->service_id, node_key->index);
+}
+
+static size_t
+open_nodes_hash(const ht_link_t *item)
+{
+        struct mfs_node *m = hash_table_get_inst(item, struct mfs_node, link);
+        return hash_combine(m->instance->service_id, m->ino_i->index);
+}
+
+static bool
+open_nodes_key_equal(void *key, const ht_link_t *item)
+{
+        node_key_t *node_key = (node_key_t*)key;
+        struct mfs_node *mnode = hash_table_get_inst(item, struct mfs_node, link);
+
+        return node_key->service_id == mnode->instance->service_id
+                && node_key->index == mnode->ino_i->index;
+}
+
+static hash_table_ops_t open_nodes_ops = {
         .hash = open_nodes_hash,
-        .compare = open_nodes_compare,
-        .remove_callback = open_nodes_remove_cb,
+        .key_hash = open_nodes_key_hash,
+        .key_equal = open_nodes_key_equal,
+        .equal = 0,
+        .remove_callback = 0,
 };
 
@@ -134 +129 @@
 mfs_global_init(void)
 {
-        if (!hash_table_create(&open_nodes, OPEN_NODES_BUCKETS,
-            OPEN_NODES_KEYS, &open_nodes_ops)) {
+        if (!hash_table_create(&open_nodes, 0, 0, &open_nodes_ops)) {
                 return ENOMEM;
         }
@@ -406 +400 @@
         mnode->refcnt = 1;
 
-        link_initialize(&mnode->link);
-
-        unsigned long key[] = {
-                [OPEN_NODES_SERVICE_KEY] = inst->service_id,
-                [OPEN_NODES_INODE_KEY] = inum,
-        };
-
         fibril_mutex_lock(&open_nodes_lock);
-        hash_table_insert(&open_nodes, key, &mnode->link);
+        hash_table_insert(&open_nodes, &mnode->link);
         fibril_mutex_unlock(&open_nodes_lock);
         inst->open_nodes_cnt++;
@@ -513 +500 @@
         mnode->refcnt--;
         if (mnode->refcnt == 0) {
-                unsigned long key[] = {
-                        [OPEN_NODES_SERVICE_KEY] = mnode->instance->service_id,
-                        [OPEN_NODES_INODE_KEY] = mnode->ino_i->index
-                };
-                hash_table_remove(&open_nodes, key, OPEN_NODES_KEYS);
+                hash_table_remove_item(&open_nodes, &mnode->link);
                 assert(mnode->instance->open_nodes_cnt > 0);
                 mnode->instance->open_nodes_cnt--;
@@ -576 +559 @@
 
         /* Check if the node is not already open */
-        unsigned long key[] = {
-                [OPEN_NODES_SERVICE_KEY] = inst->service_id,
-                [OPEN_NODES_INODE_KEY] = index,
+        node_key_t key = {
+                .service_id = inst->service_id,
+                .index = index
         };
-        link_t *already_open = hash_table_find(&open_nodes, key);
+        
+        ht_link_t *already_open = hash_table_find(&open_nodes, &key);
 
         if (already_open) {
-                mnode = hash_table_get_instance(already_open, struct mfs_node, link);
+                mnode = hash_table_get_inst(already_open, struct mfs_node, link);
                 *rfn = mnode->fsnode;
                 mnode->refcnt++;
@@ -614 +598 @@
         mnode->ino_i = ino_i;
         mnode->refcnt = 1;
-        link_initialize(&mnode->link);
 
         mnode->instance = inst;
@@ -621 +604 @@
         *rfn = node;
 
-        hash_table_insert(&open_nodes, key, &mnode->link);
+        hash_table_insert(&open_nodes, &mnode->link);
         inst->open_nodes_cnt++;