The error ENOENT from osd has special meaning.It means the data of
read-area are all-zero.In order to reduce the flow between client and
osd, it used this method.
Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx>
---
fs/ceph/file.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 2ddf061..81a9dfc 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -342,6 +342,11 @@ more:
ci->i_truncate_seq,
ci->i_truncate_size,
page_pos, pages_left, page_align);
+ /*
+ * This error is return from osd.It means the read-area is allzero.
+ * So in order to reduce the flow,it return this value the reciver
+ * should fill zero.
+ */
if (ret == -ENOENT)
ret = 0;
hit_stripe = this_len < left;
--
1.8.1.2
Thanks!
Jianpeng Ma?韬{.n?????%??檩??w?{.n????u朕?Ф?塄}?财??j:+v?? ? ???2??璀??摺?囤??z夸z罐?+?????w棹f
