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Commit f44246e3 authored by Alex Elder's avatar Alex Elder
Browse files

libceph: simplify data length calculation 



Simplify the way the data length recorded in a message header is
calculated in ceph_osdc_build_request().

Signed-off-by: default avatarAlex Elder <elder@inktank.com>
Reviewed-by: default avatarJosh Durgin <josh.durgin@inktank.com>
parent 0eb40bf6

net/ceph/osd_client.c

+4 −8
Original line number Diff line number Diff line
@@ -335,7 +335,7 @@ void ceph_osdc_build_request(struct ceph_osd_request *req, 
	void *p;

	size_t msg_size = sizeof(*head) + num_op*sizeof(*op);

	int flags = req->r_flags;

	u64 data_len = 0;

	u64 data_len;

	int i;



	WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0);
@@ -363,8 +363,6 @@ void ceph_osdc_build_request(struct ceph_osd_request *req, 
	while (num_op--)

		osd_req_encode_op(req, op++, src_op++);



	data_len += req->r_trail.length;



	if (snapc) {

		head->snap_seq = cpu_to_le64(snapc->seq);

		head->num_snaps = cpu_to_le32(snapc->num_snaps);
@@ -374,14 +372,12 @@ void ceph_osdc_build_request(struct ceph_osd_request *req, 
		}

	}



	data_len = req->r_trail.length;

	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(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);

		data_len += len;

	}



	req->r_request->hdr.data_len = cpu_to_le32(data_len);

	req->r_request->page_alignment = req->r_page_alignment;



	BUG_ON(p > msg->front.iov_base + msg->front.iov_len);