libceph: kill ceph message bio_iter, bio_seg

The bio_iter and bio_seg fields in a message are no longer used, we
use the cursor instead.  So get rid of them and the functions that
operate on them them.

This is related to:
    http://tracker.ceph.com/issues/4428

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 459e552..252e01b 100644 (file)
--- a/include/linux/ceph/messenger.h
+++ b/include/linux/ceph/messenger.h
@@ -121,11 +121,7 @@ struct ceph_msg_data {
        enum ceph_msg_data_type         type;
        union {
 #ifdef CONFIG_BLOCK
-               struct {
-                       struct bio      *bio_iter;      /* iterator */
-                       struct bio      *bio;
-                       unsigned int    bio_seg;        /* current seg in bio */
-               };
+               struct bio              *bio;
 #endif /* CONFIG_BLOCK */
                struct {
                        struct page     **pages;        /* NOT OWNER. */

diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index c795d46..b634d20 100644 (file)
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -716,29 +716,6 @@ static void con_out_kvec_add(struct ceph_connection *con,
 }
 
 #ifdef CONFIG_BLOCK
-static void init_bio_iter(struct bio *bio, struct bio **bio_iter,
-                       unsigned int *bio_seg)
-{
-       if (!bio) {
-               *bio_iter = NULL;
-               *bio_seg = 0;
-               return;
-       }
-       *bio_iter = bio;
-       *bio_seg = (unsigned int) bio->bi_idx;
-}
-
-static void iter_bio_next(struct bio **bio_iter, unsigned int *seg)
-{
-       if (*bio_iter == NULL)
-               return;
-
-       BUG_ON(*seg >= (*bio_iter)->bi_vcnt);
-
-       (*seg)++;
-       if (*seg == (*bio_iter)->bi_vcnt)
-               init_bio_iter((*bio_iter)->bi_next, bio_iter, seg);
-}
 
 /*
  * For a bio data item, a piece is whatever remains of the next
@@ -1112,10 +1089,6 @@ static void prepare_message_data(struct ceph_msg *msg,
                msg_pos->page_pos = msg->p.alignment;
        else
                msg_pos->page_pos = 0;
-#ifdef CONFIG_BLOCK
-       if (ceph_msg_has_bio(msg))
-               init_bio_iter(msg->b.bio, &msg->b.bio_iter, &msg->b.bio_seg);
-#endif
        msg_pos->data_pos = 0;
 
        /* Initialize data cursors */
@@ -1478,10 +1451,6 @@ static void in_msg_pos_next(struct ceph_connection *con, size_t len,
        BUG_ON(received != len);
        msg_pos->page_pos = 0;
        msg_pos->page++;
-#ifdef CONFIG_BLOCK
-       if (msg->b.bio)
-               iter_bio_next(&msg->b.bio_iter, &msg->b.bio_seg);
-#endif /* CONFIG_BLOCK */
 }
 
 static u32 ceph_crc32c_page(u32 crc, struct page *page,