From 5b2ab72d367d2682c1a237448fbc1595881a88fa Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Mon, 6 May 2013 17:40:33 -0500 Subject: [PATCH] rbd: support reading parent page data Currently, rbd_img_parent_read() assumes the incoming object request contains bio data. But if a layered image is part of a multi-layer stack of images it will result in read requests of page data to parent images. Fortunately, it's not hard to add support for page data. This resolves: http://tracker.ceph.com/issues/4939 Signed-off-by: Alex Elder Reviewed-by: Josh Durgin --- drivers/block/rbd.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 15ac2a5..2a0e9b8 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2574,7 +2574,7 @@ static void rbd_img_parent_read(struct rbd_obj_request *obj_request) rbd_assert(obj_request_img_data_test(obj_request)); rbd_assert(obj_request->img_request != NULL); rbd_assert(obj_request->result == (s32) -ENOENT); - rbd_assert(obj_request->type == OBJ_REQUEST_BIO); + rbd_assert(obj_request_type_valid(obj_request->type)); rbd_dev = obj_request->img_request->rbd_dev; rbd_assert(rbd_dev->parent != NULL); @@ -2590,8 +2590,12 @@ static void rbd_img_parent_read(struct rbd_obj_request *obj_request) rbd_obj_request_get(obj_request); img_request->obj_request = obj_request; - result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO, - obj_request->bio_list); + if (obj_request->type == OBJ_REQUEST_BIO) + result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO, + obj_request->bio_list); + else + result = rbd_img_request_fill(img_request, OBJ_REQUEST_PAGES, + obj_request->pages); if (result) goto out_err; -- 2.7.4