libceph: support pages for class request data

Add the ability to provide an array of pages as outbound request
data for object class method calls.

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

2 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index 4d84a2b44f18..4191cd2c55e5 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -273,6 +273,11 @@ extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
 extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *,
                                         unsigned int which,
                                         struct ceph_pagelist *pagelist);
+extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *,
+                                        unsigned int which,
+                                        struct page **pages, u64 length,
+                                        u32 alignment, bool pages_from_pool,
+                                        bool own_pages);
 extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
                                         unsigned int which,
                                         struct page **pages, u64 length,
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index c842e877d504..467020c560b2 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -214,6 +214,18 @@ void osd_req_op_cls_request_data_pagelist(
 }
 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
 
+void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
+                        unsigned int which, struct page **pages, u64 length,
+                        u32 alignment, bool pages_from_pool, bool own_pages)
+{
+        struct ceph_osd_data *osd_data;
+
+        osd_data = osd_req_op_data(osd_req, which, cls, request_data);
+        ceph_osd_data_pages_init(osd_data, pages, length, alignment,
+                                pages_from_pool, own_pages);
+}
+EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
+
 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
                         unsigned int which, struct page **pages, u64 length,
                         u32 alignment, bool pages_from_pool, bool own_pages)