Changeset 19f24fd in mainline for uspace/srv/vfs/vfs_node.c

Timestamp:

2010-02-05T22:25:52Z (15 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

dafa2d04

Parents:

83349b03 (diff), d42976c (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge mainline changes.

File:

• uspace/srv/vfs/vfs_node.c (modified) (2 diffs)

uspace/srv/vfs/vfs_node.c

@@ -137 +137 @@
         if (free_vfs_node)
                 free(node);
+}
+
+/** Forget node.
+ *
+ * This function will remove the node from the node hash table and deallocate
+ * its memory, regardless of the node's reference count.
+ *
+ * @param node  Node to be forgotten.
+ */
+void vfs_node_forget(vfs_node_t *node)
+{
+        fibril_mutex_lock(&nodes_mutex);
+        unsigned long key[] = {
+                [KEY_FS_HANDLE] = node->fs_handle,
+                [KEY_DEV_HANDLE] = node->dev_handle,
+                [KEY_INDEX] = node->index
+        };
+        hash_table_remove(&nodes, key, 3);
+        fibril_mutex_unlock(&nodes_mutex);
+        free(node);
 }
 
@@ -231 +251 @@
 }
 
+struct refcnt_data {
+        /** Sum of all reference counts for this file system instance. */
+        unsigned refcnt;
+        fs_handle_t fs_handle;
+        dev_handle_t dev_handle;
+};
+
+static void refcnt_visitor(link_t *item, void *arg)
+{
+        vfs_node_t *node = hash_table_get_instance(item, vfs_node_t, nh_link);
+        struct refcnt_data *rd = (void *) arg;
+
+        if ((node->fs_handle == rd->fs_handle) &&
+            (node->dev_handle == rd->dev_handle))
+                rd->refcnt += node->refcnt;
+}
+
+unsigned
+vfs_nodes_refcount_sum_get(fs_handle_t fs_handle, dev_handle_t dev_handle)
+{
+        struct refcnt_data rd = {
+                .refcnt = 0,
+                .fs_handle = fs_handle,
+                .dev_handle = dev_handle
+        };
+
+        fibril_mutex_lock(&nodes_mutex);
+        hash_table_apply(&nodes, refcnt_visitor, &rd);
+        fibril_mutex_unlock(&nodes_mutex);
+
+        return rd.refcnt;
+}
+
 /**
  * @}