shithub: lwext4

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ext4_blockdev: add ext4_block_cache_flush routine.

--- a/lwext4/ext4_blockdev.c

+++ b/lwext4/ext4_blockdev.c

@@ -140,7 +140,7 @@

 {

 	int r;

 	struct ext4_bcache *bc = bdev->bc;

-	/*Only flushing unreferenced buffer is allowed.*/

+	/*Only flushing data in an unreferenced buffer is allowed.*/

 	ext4_assert(!buf->refctr);

 	if (ext4_bcache_test_flag(buf, BC_DIRTY)) {

@@ -409,11 +409,22 @@

 	return r;

 }

-int ext4_block_cache_write_back(struct ext4_blockdev *bdev, uint8_t on_off)

+int ext4_block_cache_flush(struct ext4_blockdev *bdev)

 {

-	int r;

-	struct ext4_buf *buf;

+	while (!SLIST_EMPTY(&bdev->bc->dirty_list)) {

+		int r;

+		struct ext4_buf *buf = SLIST_FIRST(&bdev->bc->dirty_list);

+		ext4_assert(buf);

+		r = ext4_block_flush_buf(bdev, buf);

+		if (r != EOK)

+			return r;

+	}

+	return EOK;

+}

+

+int ext4_block_cache_write_back(struct ext4_blockdev *bdev, uint8_t on_off)

+{

 	if (on_off)

 		bdev->cache_write_back++;

@@ -423,17 +434,8 @@

 	if (bdev->cache_write_back)

 		return EOK;

-	/*Flush all delayed cache blocks*/

-	while (!SLIST_EMPTY(&bdev->bc->dirty_list)) {

-

-		buf = SLIST_FIRST(&bdev->bc->dirty_list);

-		ext4_assert(buf);

-		r = ext4_block_flush_buf(bdev, buf);

-		if (r != EOK)

-			return r;

-

-	}

-	return EOK;

+	/*Flush data in all delayed cache blocks*/

+	return ext4_block_cache_flush(bdev);

 }

 /**

--- a/lwext4/ext4_blockdev.h

+++ b/lwext4/ext4_blockdev.h

@@ -231,6 +231,11 @@

 int ext4_block_readbytes(struct ext4_blockdev *bdev, uint64_t off, void *buf,

 			 uint32_t len);

+/**@brief   Flush all dirty buffers to disk

+ * @param   bdev block device descriptor

+ * @return  standard error code*/

+int ext4_block_cache_flush(struct ext4_blockdev *bdev);

+

 /**@brief   Enable/disable write back cache mode

  * @param   bdev block device descriptor

  * @param   on_off