ceph: set osd request message front length correctly

We didn't set the front length correctly.  When messages used
the message pool we ended up with the conservative max (4 KB), and
the rest of the time the slightly less conservative estimate.  Even
though the OSD ignores the extra data, set it to the right value to avoid
sending extra data over the network.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/fs/ceph/osd_client.c b/fs/ceph/osd_client.c
index ffe1f4064ccd1965cce222c4ef7814f1ae6b2725..c4763bff97b42de488d134dfdcb4a581202661e5 100644 (file)
--- a/fs/ceph/osd_client.c
+++ b/fs/ceph/osd_client.c
@@ -228,6 +228,9 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
        }
 
        BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
+       msg_size = p - msg->front.iov_base;
+       msg->front.iov_len = msg_size;
+       msg->hdr.front_len = cpu_to_le32(msg_size);
        return req;
 }