+
+
+static void yaffs_FlushInodes(struct super_block *sb)
+{
+ struct inode *iptr;
+ yaffs_Object *obj;
+
+ list_for_each_entry(iptr,&sb->s_inodes, i_sb_list){
+ obj = yaffs_InodeToObject(iptr);
+ if(obj){
+ T(YAFFS_TRACE_OS, ("flushing obj %d\n",obj->objectId));
+ yaffs_FlushFile(obj,1,0);
+ }
+ }
+}
+
+
+static void yaffs_FlushSuperBlock(struct super_block *sb, int do_checkpoint)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+ if(!dev)
+ return;
+
+ yaffs_FlushInodes(sb);
+ yaffs_UpdateDirtyDirectories(dev);
+ yaffs_FlushEntireDeviceCache(dev);
+ if(do_checkpoint)
+ yaffs_CheckpointSave(dev);
+}
+
+static int yaffs_do_sync_fs(struct super_block *sb, int do_checkpoint)
+{
+
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+ unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
+
+ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
+ ("yaffs_do_sync_fs: %s %s%s\n",
+ sb->s_dirt ? "dirty" : "clean",
+ do_checkpoint ? "with checkpoint" : "no checkpoint",
+ oneshot_checkpoint ? " one-shot" : "" ));
+
+ if (sb->s_dirt || oneshot_checkpoint) {
+ yaffs_GrossLock(dev);
+ yaffs_FlushSuperBlock(sb,do_checkpoint);
+ yaffs_GrossUnlock(dev);
+
+ sb->s_dirt = 0;
+
+ if(oneshot_checkpoint)
+ yaffs_auto_checkpoint &= ~4;
+ }
+ return 0;
+}
+
+/*
+ * yaffs background thread functions .
+ * yaffs_BackgroundThread() the thread function
+ * yaffs_BackgroundStart() launches the background thread.
+ * yaffs_BackgroundStop() cleans up the background thread.
+ *
+ * NB:
+ * The thread should only run after the yaffs is initialised
+ * The thread should be stopped before yaffs is unmounted.
+ * The thread should not do any writing while the fs is in read only.
+ */
+
+#ifdef YAFFS_COMPILE_BACKGROUND
+static int yaffs_BackgroundThread(void *data)
+{
+ yaffs_Device *dev = (yaffs_Device *)data;
+ struct yaffs_LinuxContext *context = yaffs_DeviceToContext(dev);
+
+ T(YAFFS_TRACE_BACKGROUND,
+ ("yaffs_background starting for dev %p\n",
+ (void *)dev));
+
+ while(context->bgRunning){
+ T(YAFFS_TRACE_BACKGROUND,
+ ("yaffs_background\n"));
+
+ if(kthread_should_stop())
+ break;
+ yaffs_GrossLock(dev);
+ yaffs_UpdateDirtyDirectories(dev);
+ yaffs_GrossUnlock(dev);
+ msleep(500);
+ }
+ return 0;
+}
+
+static int yaffs_BackgroundStart(yaffs_Device *dev)
+{
+ int retval = 0;
+
+ struct yaffs_LinuxContext *context = yaffs_DeviceToContext(dev);
+
+ context->bgRunning = 1;
+
+ context->bgThread = kthread_run(yaffs_BackgroundThread,(void *)dev,"yaffs_%x",(unsigned)dev);
+
+ if(IS_ERR(context->bgThread)){
+ retval = PTR_ERR(context->bgThread);
+ context->bgThread = NULL;
+ context->bgRunning = 0;
+ }
+ return retval;
+}
+
+static void yaffs_BackgroundStop(yaffs_Device *dev)
+{
+ struct yaffs_LinuxContext *ctxt = yaffs_DeviceToContext(dev);
+
+ ctxt->bgRunning = 0;
+
+ if( ctxt->bgThread){
+ kthread_stop(ctxt->bgThread);
+ ctxt->bgThread = NULL;
+ }
+}
+#else
+static int yaffs_BackgroundThread(void *data)
+{
+ return 0;
+}
+
+static int yaffs_BackgroundStart(yaffs_Device *dev)
+{
+ return 0;
+}
+
+static void yaffs_BackgroundStop(yaffs_Device *dev)
+{
+}
+#endif
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static void yaffs_write_super(struct super_block *sb)
+#else
+static int yaffs_write_super(struct super_block *sb)
+#endif
+{
+
+ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, ("yaffs_write_super\n"));
+ yaffs_do_sync_fs(sb, yaffs_auto_checkpoint >= 2);
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
+ return 0;
+#endif
+}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static int yaffs_sync_fs(struct super_block *sb, int wait)
+#else
+static int yaffs_sync_fs(struct super_block *sb)
+#endif
+{
+ T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, ("yaffs_sync_fs\n"));
+
+ yaffs_do_sync_fs(sb,yaffs_auto_checkpoint >= 1);
+
+ return 0;
+}
+
+#ifdef YAFFS_USE_OWN_IGET
+
+static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
+{
+ struct inode *inode;
+ yaffs_Object *obj;
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+
+ T(YAFFS_TRACE_OS,
+ ("yaffs_iget for %lu\n", ino));
+
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
+
+ /* NB This is called as a side effect of other functions, but
+ * we had to release the lock to prevent deadlocks, so
+ * need to lock again.
+ */
+
+ yaffs_GrossLock(dev);
+
+ obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+
+ yaffs_FillInodeFromObject(inode, obj);
+
+ yaffs_GrossUnlock(dev);
+
+ unlock_new_inode(inode);
+ return inode;
+}
+
+#else
+