btrfs: send: fix old buffer length in fs_path_ensure_buf
In "btrfs: send: lower memory requirements in common case" the code to
save the old_buf_len was incorrectly moved to a wrong place and broke
the original logic.
Reported-by: Filipe David Manana <fdmanana@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Reviewed-by: Filipe David Manana <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 298e25d..246df85 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -346,6 +346,9 @@
if (p->buf_len >= len)
return 0;
+ path_len = p->end - p->start;
+ old_buf_len = p->buf_len;
+
/*
* First time the inline_buf does not suffice
*/
@@ -368,9 +371,6 @@
p->buf_len = ksize(p->buf);
}
- path_len = p->end - p->start;
- old_buf_len = p->buf_len;
-
if (p->reversed) {
tmp_buf = p->buf + old_buf_len - path_len - 1;
p->end = p->buf + p->buf_len - 1;