libceph: record bio length

The bio is the only data item type that doesn't record its full
length.  Fix that.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>

2 files changed, 5 insertions, 1 deletions

diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h
index cdeebae03e0d..4fb870a5b5fc 100644
--- a/include/linux/ceph/messenger.h
+++ b/include/linux/ceph/messenger.h
@@ -116,7 +116,10 @@ struct ceph_msg_data {
         enum ceph_msg_data_type         type;
         union {
 #ifdef CONFIG_BLOCK
-                struct bio              *bio;
+                struct {
+                        struct bio      *bio;
+                        size_t          bio_length;
+                };
 #endif /* CONFIG_BLOCK */
                 struct {
                         struct page     **pages;        /* NOT OWNER. */
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index cb5b4e6733f0..731bb9efa2c6 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -3032,6 +3032,7 @@ void ceph_msg_data_set_bio(struct ceph_msg *msg, struct bio *bio,
         data = ceph_msg_data_create(CEPH_MSG_DATA_BIO);
         BUG_ON(!data);
         data->bio = bio;
+        data->bio_length = length;
 
         msg->data = data;
         msg->data_length = length;