libceph: define osd data initialization helpers

Define and use functions that encapsulate the initializion of a
ceph_osd_data structure.

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

1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index 5ee1a3776b4b..af60dac1f9c0 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -280,6 +280,17 @@ static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
         kref_put(&req->r_kref, ceph_osdc_release_request);
 }
 
+extern void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
+                                     struct page **pages, u64 length,
+                                     u32 alignment, bool pages_from_pool,
+                                     bool own_pages);
+extern void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
+                                        struct ceph_pagelist *pagelist);
+#ifdef CONFIG_BLOCK
+extern void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
+                                   struct bio *bio, size_t bio_length);
+#endif /* CONFIG_BLOCK */
+
 extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
                                    struct ceph_osd_request *req,
                                    bool nofail);