shithub: lwext4

Download patch

ref: 46c3c339d15e69ac633e122b95861151d6af1c62
parent: 01423f78d01581812e8e1c018902af4a323d4c41
author: ngkaho1234 <ngkaho1234@gmail.com>
date: Fri Dec 25 21:18:09 EST 2015 

ext4: make sure blocks are not contaminated with data in block cache.


--- a/lwext4/ext4.c
+++ b/lwext4/ext4.c
@@ -1497,6 +1497,10 @@
 		if (r != EOK)
 			goto Finish;
 
+		r = ext4_block_flush_lba(f->mp->fs.bdev, fblk);
+		if (r != EOK)
+			goto Finish;
+
 		off = fblk * block_size + unalg;
 		r = ext4_block_writebytes(f->mp->fs.bdev, off, u8_buf, len);
 		if (r != EOK)
@@ -1521,6 +1525,8 @@
 	fblock_count = 0;
 	while (size >= block_size) {
 
+		uint32_t i;
+
 		while (iblk_idx < iblock_last) {
 			if (iblk_idx < ifile_blocks) {
 				r = ext4_fs_init_inode_dblk_idx(&ref, iblk_idx,
@@ -1550,6 +1556,13 @@
 			fblock_count++;
 		}
 
+		for (i = 0;i < fblock_count;i++) {
+			r = ext4_block_flush_lba(f->mp->fs.bdev, fblock_start + i);
+			if (r != EOK)
+				goto Finish;
+
+		}
+
 		r = ext4_blocks_set_direct(f->mp->fs.bdev, u8_buf, fblock_start,
 					   fblock_count);
 		if (r != EOK)
@@ -1592,6 +1605,10 @@
 				/*Node size sholud be updated.*/
 				goto out_fsize;
 		}
+
+		r = ext4_block_flush_lba(f->mp->fs.bdev, fblk);
+		if (r != EOK)
+			goto Finish;
 
 		off = fblk * block_size;
 		r = ext4_block_writebytes(f->mp->fs.bdev, off, u8_buf, size);