pbx/pbx_spool: Fix issue when call files were executed too early

pbx_spool used to delete/move the call file upon successful outgoing
call completion, but did not delete it from in-memory list of files
(dirlist, used only when compiled with inotify/kqueue support).
That resulted in an extra attempt to process that filename after
retrytime seconds.
Then, if a new file with the same name appears that is scheduled
in future further than the completed one plus its retrytime,
then it gets executed earlier than expected.

This patch fixes remove_from_queue function to also remove the entry
from the dirlist.

ASTERISK-17069 #close
Reported by: Jeremy Kister

ASTERISK-24442 #close
Reported by: tootai

Change-Id: If9ec9b88073661ce485d6b008fd0b2612e49a28b

pbx/pbx_spool.c

@@ -102,6 +102,14 @@ struct outgoing {
 };
 
 #if defined(HAVE_INOTIFY) || defined(HAVE_KQUEUE)
+struct direntry {
+	AST_LIST_ENTRY(direntry) list;
+	time_t mtime;
+	char name[0];
+};
+
+static AST_LIST_HEAD_STATIC(dirlist, direntry);
+
 static void queue_file(const char *filename, time_t when);
 #endif
 
@@ -323,6 +331,10 @@ static int remove_from_queue(struct outgoing *o, const char *status)
 	char newfn[256];
 	const char *bname;
 
+#if defined(HAVE_INOTIFY) || defined(HAVE_KQUEUE)
+	struct direntry *cur;
+#endif
+
 	if (!ast_test_flag(&o->options, SPOOL_FLAG_ALWAYS_DELETE)) {
 		struct stat current_file_status;
 
@@ -333,6 +345,19 @@ static int remove_from_queue(struct outgoing *o, const char *status)
 		}
 	}
 
+#if defined(HAVE_INOTIFY) || defined(HAVE_KQUEUE)
+	AST_LIST_LOCK(&dirlist);
+	AST_LIST_TRAVERSE_SAFE_BEGIN(&dirlist, cur, list) {
+		if (!strcmp(cur->name, o->fn)) {
+			AST_LIST_REMOVE_CURRENT(list);
+			ast_free(cur);
+			break;
+		}
+	}
+	AST_LIST_TRAVERSE_SAFE_END;
+	AST_LIST_UNLOCK(&dirlist);
+#endif
+
 	if (!ast_test_flag(&o->options, SPOOL_FLAG_ARCHIVE)) {
 		unlink(o->fn);
 		return 0;
@@ -486,14 +511,6 @@ static int scan_service(const char *fn, time_t now)
 	return 0;
 }
 
-#if defined(HAVE_INOTIFY) || defined(HAVE_KQUEUE)
-struct direntry {
-	AST_LIST_ENTRY(direntry) list;
-	time_t mtime;
-	char name[0];
-};
-
-static AST_LIST_HEAD_STATIC(dirlist, direntry);
 
 #if defined(HAVE_INOTIFY)
 /* Only one thread is accessing this list, so no lock is necessary */
@@ -501,6 +518,8 @@ static AST_LIST_HEAD_NOLOCK_STATIC(createlist, direntry);
 static AST_LIST_HEAD_NOLOCK_STATIC(openlist, direntry);
 #endif
 
+#if defined(HAVE_INOTIFY) || defined(HAVE_KQUEUE)
+
 static void queue_file(const char *filename, time_t when)
 {
 	struct stat st;