Re: [PATCH 04/20] libceph: define a few more helpers

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There's a sizeof without parentheses, but after fixing that:

Reviewed-by: Josh Durgin <josh.durgin@xxxxxxxxxxx>

On 04/05/2013 07:02 AM, Alex Elder wrote:
Define ceph_osd_data_init() and ceph_osd_data_release() to clean up
a little code.

Signed-off-by: Alex Elder <elder@xxxxxxxxxxx>
---
  net/ceph/osd_client.c |   44 ++++++++++++++++++++++++++------------------
  1 file changed, 26 insertions(+), 18 deletions(-)

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index f8f8561..df0f856 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -79,6 +79,12 @@ static int calc_layout(struct ceph_file_layout
*layout, u64 off, u64 *plen,
  	return 0;
  }

+static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
+{
+	memset(osd_data, 0, sizeof *osd_data);
+	osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
+}
+
  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)
@@ -111,16 +117,28 @@ void ceph_osd_data_bio_init(struct ceph_osd_data
*osd_data,
  EXPORT_SYMBOL(ceph_osd_data_bio_init);
  #endif /* CONFIG_BLOCK */

+static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
+{
+	if (osd_data->type != CEPH_OSD_DATA_TYPE_PAGES)
+		return;
+
+	if (osd_data->own_pages) {
+		int num_pages;
+
+		num_pages = calc_pages_for((u64)osd_data->alignment,
+						(u64)osd_data->length);
+		ceph_release_page_vector(osd_data->pages, num_pages);
+	}
+}
+
  /*
   * requests
   */
  void ceph_osdc_release_request(struct kref *kref)
  {
-	int num_pages;
-	struct ceph_osd_request *req = container_of(kref,
-						    struct ceph_osd_request,
-						    r_kref);
+	struct ceph_osd_request *req;

+	req = container_of(kref, struct ceph_osd_request, r_kref);
  	if (req->r_request)
  		ceph_msg_put(req->r_request);
  	if (req->r_reply) {
@@ -128,18 +146,8 @@ void ceph_osdc_release_request(struct kref *kref)
  		ceph_msg_put(req->r_reply);
  	}

-	if (req->r_data_in.type == CEPH_OSD_DATA_TYPE_PAGES &&
-			req->r_data_in.own_pages) {
-		num_pages = calc_pages_for((u64)req->r_data_in.alignment,
-						(u64)req->r_data_in.length);
-		ceph_release_page_vector(req->r_data_in.pages, num_pages);
-	}
-	if (req->r_data_out.type == CEPH_OSD_DATA_TYPE_PAGES &&
-			req->r_data_out.own_pages) {
-		num_pages = calc_pages_for((u64)req->r_data_out.alignment,
-						(u64)req->r_data_out.length);
-		ceph_release_page_vector(req->r_data_out.pages, num_pages);
-	}
+	ceph_osd_data_release(&req->r_data_in);
+	ceph_osd_data_release(&req->r_data_out);

  	ceph_put_snap_context(req->r_snapc);
  	if (req->r_mempool)
@@ -203,8 +211,8 @@ struct ceph_osd_request
*ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
  	}
  	req->r_reply = msg;

-	req->r_data_in.type = CEPH_OSD_DATA_TYPE_NONE;
-	req->r_data_out.type = CEPH_OSD_DATA_TYPE_NONE;
+	ceph_osd_data_init(&req->r_data_in);
+	ceph_osd_data_init(&req->r_data_out);

  	/* create request message; allow space for oid */
  	if (use_mempool)


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