shithub: lwext4

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ext4: add ext4_cache_flush for explicit cache flush

--- a/include/ext4.h

+++ b/include/ext4.h

@@ -234,6 +234,14 @@

  * @return  standard error code */

 int ext4_cache_write_back(const char *path, bool on);

+

+/**@brief   Force cache flush.

+ *

+ * @param   path mount point path

+ *

+ * @return  standard error code */

+int ext4_cache_flush(const char *path);

+

 /********************************FILE OPERATIONS*****************************/

 /**@brief   Remove file by path.

--- a/src/ext4.c

+++ b/src/ext4.c

@@ -1387,14 +1387,29 @@

 int ext4_cache_write_back(const char *path, bool on)

 {

 	struct ext4_mountpoint *mp = ext4_get_mount(path);

+	int ret;

 	if (!mp)

 		return ENOENT;

 	EXT4_MP_LOCK(mp);

-	ext4_block_cache_write_back(mp->fs.bdev, on);

+	ret = ext4_block_cache_write_back(mp->fs.bdev, on);

 	EXT4_MP_UNLOCK(mp);

-	return EOK;

+	return ret;

+}

+

+int ext4_cache_flush(const char *path)

+{

+	struct ext4_mountpoint *mp = ext4_get_mount(path);

+	int ret;

+

+	if (!mp)

+		return ENOENT;

+

+	EXT4_MP_LOCK(mp);

+	ret = ext4_block_cache_flush(mp->fs.bdev);

+	EXT4_MP_UNLOCK(mp);

+	return ret;

 }

 int ext4_fremove(const char *path)