Only allocate two osd ops for discard requests, since the preallocation hint is only added for regular writes. Use rbd_img_obj_request_fill() to recreate the original write or discard osd operations, isolating that logic to one place, and change the assert in rbd_osd_req_create_copyup() to accept discard requests as well.
Signed-off-by: Josh Durgin <[email protected]> --- drivers/block/rbd.c | 47 +++++++++++++++++++---------------------------- 1 file changed, 19 insertions(+), 28 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 7bcdeda..c8fc8fc 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1838,9 +1838,10 @@ static struct ceph_osd_request *rbd_osd_req_create( } /* - * Create a copyup osd request based on the information in the - * object request supplied. A copyup request has three osd ops, - * a copyup method call, a hint op, and a write op. + * Create a copyup osd request based on the information in the object + * request supplied. A copyup request has two or three osd ops, a + * copyup method call, potentially a hint op, and a write or truncate + * or zero op. */ static struct ceph_osd_request * rbd_osd_req_create_copyup(struct rbd_obj_request *obj_request) @@ -1850,18 +1851,24 @@ rbd_osd_req_create_copyup(struct rbd_obj_request *obj_request) struct rbd_device *rbd_dev; struct ceph_osd_client *osdc; struct ceph_osd_request *osd_req; + int num_osd_ops = 3; rbd_assert(obj_request_img_data_test(obj_request)); img_request = obj_request->img_request; rbd_assert(img_request); - rbd_assert(img_request_write_test(img_request)); + rbd_assert(img_request_write_test(img_request) || + img_request_discard_test(img_request)); - /* Allocate and initialize the request, for the three ops */ + if (img_request_discard_test(img_request)) + num_osd_ops = 2; + + /* Allocate and initialize the request, for all the ops */ snapc = img_request->snapc; rbd_dev = img_request->rbd_dev; osdc = &rbd_dev->rbd_client->client->osdc; - osd_req = ceph_osdc_alloc_request(osdc, snapc, 3, false, GFP_ATOMIC); + osd_req = ceph_osdc_alloc_request(osdc, snapc, num_osd_ops, + false, GFP_ATOMIC); if (!osd_req) return NULL; /* ENOMEM */ @@ -2401,7 +2408,8 @@ rbd_img_obj_copyup_callback(struct rbd_obj_request *obj_request) struct page **pages; u32 page_count; - rbd_assert(obj_request->type == OBJ_REQUEST_BIO); + rbd_assert(obj_request->type == OBJ_REQUEST_BIO || + obj_request->type == OBJ_REQUEST_NODATA); rbd_assert(obj_request_img_data_test(obj_request)); img_request = obj_request->img_request; rbd_assert(img_request); @@ -2439,11 +2447,10 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) struct ceph_osd_client *osdc; struct rbd_device *rbd_dev; struct page **pages; + enum obj_operation_type op_type; u32 page_count; int img_result; u64 parent_length; - u64 offset; - u64 length; rbd_assert(img_request_child_test(img_request)); @@ -2507,26 +2514,10 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) osd_req_op_cls_request_data_pages(osd_req, 0, pages, parent_length, 0, false, false); - /* Then the hint op */ - - osd_req_op_alloc_hint_init(osd_req, 1, rbd_obj_bytes(&rbd_dev->header), - rbd_obj_bytes(&rbd_dev->header)); - - /* And the original write request op */ - - offset = orig_request->offset; - length = orig_request->length; - osd_req_op_extent_init(osd_req, 2, CEPH_OSD_OP_WRITE, - offset, length, 0, 0); - if (orig_request->type == OBJ_REQUEST_BIO) - osd_req_op_extent_osd_data_bio(osd_req, 2, - orig_request->bio_list, length); - else - osd_req_op_extent_osd_data_pages(osd_req, 2, - orig_request->pages, length, - offset & ~PAGE_MASK, false, false); + /* Add the other op(s) */ - rbd_osd_req_format_write(orig_request); + op_type = rbd_img_request_op_type(orig_request->img_request); + rbd_img_obj_request_fill(orig_request, osd_req, op_type, 1); /* All set, send it off. */ -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
