X-Git-Url: http://git.tuebingen.mpg.de/?p=dss.git;a=blobdiff_plain;f=snap.h;h=eca484a462b6d3ad77c23d75d5b0518058dd5057;hp=afac5e9554ab6eae991e796bbf386bddb82d8540;hb=442d1920cb866fb6e0a816d7e175b5cdb8c0e1a8;hpb=551ae2318396d9f1ee0a00bed2b94f0b9c9e9c55

diff --git a/snap.h b/snap.h
index afac5e9..eca484a 100644
--- a/snap.h
+++ b/snap.h
@@ -4,22 +4,22 @@
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
-/** The state of snapshot creation. */
-enum {
+/** The possible states for snapshot creation/removal. */
+enum hook_status {
 	/** We are ready to take the next snapshot. */
-	SCS_READY,
-	/** The pre-creation hook has been started. */
-	SCS_PRE_HOOK_RUNNING,
-	/** The pre-creation hook exited successfully. */
-	SCS_PRE_HOOK_SUCCESS,
-	/** The rsync process is running. */
-	SCS_RSYNC_RUNNING,
-	/** The rsync process exited successfully. */
-	SCS_RSYNC_SUCCESS,
-	/** The rsync process needs to be restarted. */
-	SCS_RSYNC_NEEDS_RESTART,
-	/** The post-create hook has been started. */
-	SCS_POST_HOOK_RUNNING,
+	HS_READY,
+	/** The pre-create/pre-remove hook has been started. */
+	HS_PRE_RUNNING,
+	/** The pre-create/pre-remove hook exited successfully. */
+	HS_PRE_SUCCESS,
+	/** The rsync/rm process is running. */
+	HS_RUNNING,
+	/** The rsync/rm process exited successfully. */
+	HS_SUCCESS,
+	/** The rsync/rm process needs to be restarted. */
+	HS_NEEDS_RESTART,
+	/** The post-create/post-remove hook has been started. */
+	HS_POST_RUNNING,
 };
 
 /**
@@ -98,3 +98,13 @@ _static_inline_ struct snapshot *get_oldest_snapshot(struct snapshot_list *sl)
 		return NULL;
 	return sl->snapshots[0];
 }
+
+/**
+ * Get the newest snapshot in a snapshot list.
+ */
+_static_inline_ struct snapshot *get_newest_snapshot(struct snapshot_list *sl)
+{
+	if (!sl->num_snapshots)
+		return NULL;
+	return sl->snapshots[sl->num_snapshots - 1];
+}