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>

diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h
index cdeebae..4fb870a 100644 (file)
--- 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 cb5b4e6..731bb9e 100644 (file)
--- 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;