shithub: lwext4

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ext4_blockdev: add ext4_block_flush_lba routine.

--- a/lwext4/ext4_blockdev.c

+++ b/lwext4/ext4_blockdev.c

@@ -161,6 +161,19 @@

 	return EOK;

 }

+int ext4_block_flush_lba(struct ext4_blockdev *bdev, uint64_t lba)

+{

+	int r = EOK;

+	struct ext4_buf *buf;

+	struct ext4_block b;

+	buf = ext4_bcache_find_get(bdev->bc, &b, lba);

+	if (buf) {

+		r = ext4_block_flush_buf(bdev, buf);

+		ext4_bcache_free(bdev->bc, &b);

+	}

+	return r;

+}

+

 int ext4_block_cache_shake(struct ext4_blockdev *bdev)

 {

 	struct ext4_buf *buf;

--- a/lwext4/ext4_blockdev.h

+++ b/lwext4/ext4_blockdev.h

@@ -169,6 +169,13 @@

  * @return  standard error code*/

 int ext4_block_flush_buf(struct ext4_blockdev *bdev, struct ext4_buf *buf);

+/**@brief   Flush data in buffer of given lba to disk,

+ *          if that buffer exists in block cache.

+ * @param   bdev block device descriptor

+ * @param   lba logical block address

+ * @return  standard error code*/

+int ext4_block_flush_lba(struct ext4_blockdev *bdev, uint64_t lba);

+

 /**@brief   Set logical block size in block device.

  * @param   bdev block device descriptor

  * @param   lb_size logical block size (in bytes)