[PATCH 1/4] libceph: pass length to ceph_osdc_build_request()

[Alex Elder <elder@inktank.com>]

The len argument to ceph_osdc_build_request() is set up to be
passed by address, but that function never updates its value
so there's no need to do this.  Tighten up the interface by
passing the length directly.

Signed-off-by: Alex Elder <elder@inktank.com>
---
 drivers/block/rbd.c             |    2 +-
 include/linux/ceph/osd_client.h |    2 +-
 net/ceph/osd_client.c           |    6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 9dc1d5f..08d1b6e 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1174,7 +1174,7 @@ static int rbd_do_request(struct request *rq,
 				snapid, ofs, &len, &bno, osd_req, ops);
 	rbd_assert(ret == 0);

-	ceph_osdc_build_request(osd_req, ofs, &len, ops, snapc, &mtime);
+	ceph_osdc_build_request(osd_req, ofs, len, ops, snapc, &mtime);

 	if (linger_req) {
 		ceph_osdc_set_request_linger(osdc, osd_req);
diff --git a/include/linux/ceph/osd_client.h
b/include/linux/ceph/osd_client.h
index 61562c7..4bfb458 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -224,7 +224,7 @@ extern struct ceph_osd_request
*ceph_osdc_alloc_request(struct ceph_osd_client *
 					       struct bio *bio);

 extern void ceph_osdc_build_request(struct ceph_osd_request *req,
-				    u64 off, u64 *plen,
+				    u64 off, u64 len,
 				    struct ceph_osd_req_op *src_ops,
 				    struct ceph_snap_context *snapc,
 				    struct timespec *mtime);
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 20b7921..d550d9e 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -328,7 +328,7 @@ static void osd_req_encode_op(struct
ceph_osd_request *req,
  *
  */
 void ceph_osdc_build_request(struct ceph_osd_request *req,
-			     u64 off, u64 *plen,
+			     u64 off, u64 len,
 			     struct ceph_osd_req_op *src_ops,
 			     struct ceph_snap_context *snapc,
 			     struct timespec *mtime)
@@ -382,7 +382,7 @@ void ceph_osdc_build_request(struct ceph_osd_request
*req,

 	if (flags & CEPH_OSD_FLAG_WRITE) {
 		req->r_request->hdr.data_off = cpu_to_le16(off);
-		req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len);
+		req->r_request->hdr.data_len = cpu_to_le32(len + data_len);
 	} else if (data_len) {
 		req->r_request->hdr.data_off = 0;
 		req->r_request->hdr.data_len = cpu_to_le32(data_len);
@@ -456,7 +456,7 @@ struct ceph_osd_request
*ceph_osdc_new_request(struct ceph_osd_client *osdc,
 	req->r_num_pages = calc_pages_for(page_align, *plen);
 	req->r_page_alignment = page_align;

-	ceph_osdc_build_request(req, off, plen, ops,
+	ceph_osdc_build_request(req, off, *plen, ops,
 				snapc,
 				mtime);

-- 
1.7.9.5