output-filedata: close files even w/o data

If there is no data chunk but the file is closed/truncated anyway,
logging is still required.

src/output-filedata.c

@@ -91,6 +91,32 @@ int OutputRegisterFiledataLogger(const char *name, FiledataLogger LogFunc, Outpu
 
 SC_ATOMIC_DECLARE(unsigned int, file_id);
 
+static int CallLoggers(ThreadVars *tv, OutputLoggerThreadStore *store_list,
+        Packet *p, const File *ff, const FileData *ffd, uint8_t flags)
+{
+    OutputFiledataLogger *logger = list;
+    OutputLoggerThreadStore *store = store_list;
+    int file_logged = 0;
+
+    while (logger && store) {
+        BUG_ON(logger->LogFunc == NULL);
+
+        SCLogDebug("logger %p", logger);
+        PACKET_PROFILING_TMM_START(p, logger->module_id);
+        logger->LogFunc(tv, store->thread_data, (const Packet *)p, ff, ffd, flags);
+        PACKET_PROFILING_TMM_END(p, logger->module_id);
+
+        file_logged = 1;
+
+        logger = logger->next;
+        store = store->next;
+
+        BUG_ON(logger == NULL && store != NULL);
+        BUG_ON(logger != NULL && store == NULL);
+    }
+    return file_logged;
+}
+
 static TmEcode OutputFiledataLog(ThreadVars *tv, Packet *p, void *thread_data, PacketQueue *pq, PacketQueue *postpq)
 {
     BUG_ON(thread_data == NULL);
@@ -144,6 +170,14 @@ static TmEcode OutputFiledataLog(ThreadVars *tv, Packet *p, void *thread_data, P
                 continue;
             }
 
+            /* if we have no data chunks left to log, we should still
+             * close the logger(s) */
+            if (ff->chunks_head == NULL && (file_trunc || file_close)) {
+                CallLoggers(tv, store, p, ff, NULL, OUTPUT_FILEDATA_FLAG_CLOSE);
+                ff->flags |= FILE_STORED;
+                continue;
+            }
+
             FileData *ffd;
             for (ffd = ff->chunks_head; ffd != NULL; ffd = ffd->next) {
                 uint8_t flags = 0;
@@ -189,24 +223,8 @@ static TmEcode OutputFiledataLog(ThreadVars *tv, Packet *p, void *thread_data, P
                 if (ffd->next == NULL && ff->state >= FILE_STATE_CLOSED)
                     flags |= OUTPUT_FILEDATA_FLAG_CLOSE;
 
-                logger = list;
-                store = op_thread_data->store;
-                while (logger && store) {
-                    BUG_ON(logger->LogFunc == NULL);
-
-                    SCLogDebug("logger %p", logger);
-                    PACKET_PROFILING_TMM_START(p, logger->module_id);
-                    logger->LogFunc(tv, store->thread_data, (const Packet *)p, (const File *)ff,
-                            (const FileData *)write_ffd, flags);
-                    PACKET_PROFILING_TMM_END(p, logger->module_id);
-                    file_logged = 1;
-
-                    logger = logger->next;
-                    store = store->next;
-
-                    BUG_ON(logger == NULL && store != NULL);
-                    BUG_ON(logger != NULL && store == NULL);
-                }
+                /* do the actual logging */
+                file_logged = CallLoggers(tv, store, p, ff, write_ffd, flags);
 
                 if (file_logged) {
                     ffd->stored = 1;