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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: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-02-14 12:16:43 -06:00
parent 0eb40bf65e
commit f44246e394
1 changed files with 4 additions and 8 deletions
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12
net/ceph/osd_client.c
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@ -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);