Import dnbd* from the former openslx-contrib repo as of revision 92.

openslx-contrib is currently read only and will get removed in some
days.


git-svn-id: http://svn.openslx.org/svn/openslx/contrib/dnbd2/trunk@1592 95ad53e4-c205-0410-b2fa-d234c58c8868

1 files changed, 37 insertions, 0 deletions

diff --git a/server/tree.h b/server/tree.h
new file mode 100644
index 0000000..e6eea84
--- /dev/null
+++ b/server/tree.h
@@ -0,0 +1,37 @@
+/*
+ * server/tree.h - Mechanism to store Datasets in binary trees.
+ */
+
+
+/*
+ * This structure represents a Dataset along with its config file and
+ * file descriptor. This type of items will be stored in a binary
+ * tree.  The key to this structure is the Dataset's Volume-ID and
+ * Release-ID (they must be unique in each server instance).
+ */
+typedef struct node {
+	dataset_t *ds;
+	char path[FILE_NAME_MAX];
+	int fd;
+	int servers;
+	dnbd2_server_t server[ALT_SERVERS_MAX];
+} node_t;
+
+
+/*
+ * Returns: 0 on success or -1 on failure.
+ */
+int tree_insert(node_t *data, void **tree);
+
+
+/*
+ * Returns: Pointer to item on search-hit or NULL on search-miss.
+ */
+node_t *tree_find(node_t *data, void **tree);
+
+
+/*
+ * Free all resources used by the tree.  Useful when reloading
+ * datasets.
+ */
+void tree_destroy(void **tree);