[PATCH] e4defrag: fallocate donor file only once

[Peng Tao <bergwolf@gmail.com>]

If we allocate the donor file once for all, it will have a better chance
to be continuous.

Signed-off-by: "Peng Tao" <bergwolf@gmail.com>
---
 misc/e4defrag.c |   21 ++++++++++-----------
 1 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/misc/e4defrag.c b/misc/e4defrag.c
index c25514a..c1e9213 100644
--- a/misc/e4defrag.c
+++ b/misc/e4defrag.c
@@ -1603,6 +1603,7 @@ static int file_defrag(const char *file, const struct stat64 *buf,
 	struct fiemap_extent_list	*donor_list_logical = NULL;
 	struct fiemap_extent_group	*orig_group_head = NULL;
 	struct fiemap_extent_group	*orig_group_tmp = NULL;
+	ext4_fsblk_t	orig_block_count;
 
 	defraged_file_count++;
 
@@ -1742,19 +1743,17 @@ static int file_defrag(const char *file, const struct stat64 *buf,
 	/* Allocate space for donor inode */
 	orig_group_tmp = orig_group_head;
 	do {
-		ret = fallocate(donor_fd, 0,
-		  (loff_t)orig_group_tmp->start->data.logical * block_size,
-		  (loff_t)orig_group_tmp->len * block_size);
-		if (ret < 0) {
-			if (mode_flag & DETAIL) {
-				PRINT_FILE_NAME(file);
-				PRINT_ERR_MSG_WITH_ERRNO("Failed to fallocate");
-			}
-			goto out;
-		}