1 files changed, 28 insertions, 13 deletions

diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index 02da75c084..1c1172163c 100644
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -904,10 +904,8 @@ long int ext4fs_get_new_blk_no(void)
 restart:
 		fs->curr_blkno++;
 		/* get the blockbitmap index respective to blockno */
-		if (fs->blksz != 1024) {
-			bg_idx = fs->curr_blkno / blk_per_grp;
-		} else {
-			bg_idx = fs->curr_blkno / blk_per_grp;
+		bg_idx = fs->curr_blkno / blk_per_grp;
+		if (fs->blksz == 1024) {
 			remainder = fs->curr_blkno % blk_per_grp;
 			if (!remainder)
 				bg_idx--;
@@ -1843,16 +1841,20 @@ long int read_allocated_block(struct ext2_inode *inode, int fileblock)
 	return blknr;
 }
 
-void ext4fs_close(void)
+/**
+ * ext4fs_reinit_global() - Reinitialize values of ext4 write implementation's
+ *			    global pointers
+ *
+ * This function assures that for a file with the same name but different size
+ * the sequential store on the ext4 filesystem will be correct.
+ *
+ * In this function the global data, responsible for internal representation
+ * of the ext4 data are initialized to the reset state. Without this, during
+ * replacement of the smaller file with the bigger truncation of new file was
+ * performed.
+ */
+void ext4fs_reinit_global(void)
 {
-	if ((ext4fs_file != NULL) && (ext4fs_root != NULL)) {
-		ext4fs_free_node(ext4fs_file, &ext4fs_root->diropen);
-		ext4fs_file = NULL;
-	}
-	if (ext4fs_root != NULL) {
-		free(ext4fs_root);
-		ext4fs_root = NULL;
-	}
 	if (ext4fs_indir1_block != NULL) {
 		free(ext4fs_indir1_block);
 		ext4fs_indir1_block = NULL;
@@ -1872,6 +1874,19 @@ void ext4fs_close(void)
 		ext4fs_indir3_blkno = -1;
 	}
 }
+void ext4fs_close(void)
+{
+	if ((ext4fs_file != NULL) && (ext4fs_root != NULL)) {
+		ext4fs_free_node(ext4fs_file, &ext4fs_root->diropen);
+		ext4fs_file = NULL;
+	}
+	if (ext4fs_root != NULL) {
+		free(ext4fs_root);
+		ext4fs_root = NULL;
+	}
+
+	ext4fs_reinit_global();
+}
 
 int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
 				struct ext2fs_node **fnode, int *ftype)