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rbd: get rid of img_req->copyup_pages 

The initiating object request is the proper owner -- save a bit of
space.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
This commit is contained in:
Ilya Dryomov 2018-01-20 10:30:11 +01:00
parent 06fbb69935
commit f9dcbc44cd
1 changed files with 9 additions and 34 deletions
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43
drivers/block/rbd.c
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@ -309,8 +309,6 @@ struct rbd_img_request {
struct request *rq; /* block request */
struct rbd_obj_request *obj_request; /* obj req initiator */
};
struct page **copyup_pages;
u32 copyup_page_count;
spinlock_t completion_lock;/* protects next_completion */
u32 next_completion;
rbd_img_callback_t callback;
@ -1940,6 +1938,9 @@ static void rbd_obj_request_destroy(struct kref *kref)
break;
}
ceph_release_page_vector(obj_request->copyup_pages,
obj_request->copyup_page_count);
kmem_cache_free(rbd_obj_request_cache, obj_request);
}
@ -2372,8 +2373,6 @@ rbd_osd_copyup_callback(struct rbd_obj_request *obj_request)
{
struct rbd_img_request *img_request;
struct rbd_device *rbd_dev;
struct page **pages;
u32 page_count;
dout("%s: obj %p\n", __func__, obj_request);
@ -2386,14 +2385,6 @@ rbd_osd_copyup_callback(struct rbd_obj_request *obj_request)
rbd_dev = img_request->rbd_dev;
rbd_assert(rbd_dev);
pages = obj_request->copyup_pages;
rbd_assert(pages != NULL);
obj_request->copyup_pages = NULL;
page_count = obj_request->copyup_page_count;
rbd_assert(page_count);
obj_request->copyup_page_count = 0;
ceph_release_page_vector(pages, page_count);
/*
* We want the transfer count to reflect the size of the
* original write request. There is no such thing as a
@ -2412,9 +2403,7 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request)
struct rbd_obj_request *orig_request;
struct ceph_osd_request *osd_req;
struct rbd_device *rbd_dev;
struct page **pages;
enum obj_operation_type op_type;
u32 page_count;
int img_result;
u64 parent_length;
@ -2422,13 +2411,6 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request)
/* First get what we need from the image request */
pages = img_request->copyup_pages;
rbd_assert(pages != NULL);
img_request->copyup_pages = NULL;
page_count = img_request->copyup_page_count;
rbd_assert(page_count);
img_request->copyup_page_count = 0;
orig_request = img_request->obj_request;
rbd_assert(orig_request != NULL);
rbd_assert(obj_request_type_valid(orig_request->type));
@ -2447,7 +2429,6 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request)
* and re-submit the original write request.
*/
if (!rbd_dev->parent_overlap) {
ceph_release_page_vector(pages, page_count);
rbd_obj_request_submit(orig_request);
return;
}
@ -2467,14 +2448,12 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request)
goto out_err;
rbd_osd_req_destroy(orig_request->osd_req);
orig_request->osd_req = osd_req;
orig_request->copyup_pages = pages;
orig_request->copyup_page_count = page_count;
/* Initialize the copyup op */
osd_req_op_cls_init(osd_req, 0, CEPH_OSD_OP_CALL, "rbd", "copyup");
osd_req_op_cls_request_data_pages(osd_req, 0, pages, parent_length, 0,
false, false);
osd_req_op_cls_request_data_pages(osd_req, 0, orig_request->copyup_pages,
parent_length, 0, false, false);
/* Add the other op(s) */
@ -2487,7 +2466,6 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request)
return;
out_err:
ceph_release_page_vector(pages, page_count);
rbd_obj_request_error(orig_request, img_result);
}
@ -2542,10 +2520,13 @@ static int rbd_img_obj_parent_read_full(struct rbd_obj_request *obj_request)
pages = ceph_alloc_page_vector(page_count, GFP_NOIO);
if (IS_ERR(pages)) {
result = PTR_ERR(pages);
pages = NULL;
goto out_err;
}
rbd_assert(!obj_request->copyup_pages);
obj_request->copyup_pages = pages;
obj_request->copyup_page_count = page_count;
result = -ENOMEM;
parent_request = rbd_parent_request_create(obj_request,
img_offset, length);
@ -2556,19 +2537,13 @@ static int rbd_img_obj_parent_read_full(struct rbd_obj_request *obj_request)
if (result)
goto out_err;
parent_request->copyup_pages = pages;
parent_request->copyup_page_count = page_count;
parent_request->callback = rbd_img_obj_parent_read_full_callback;
result = rbd_img_request_submit(parent_request);
if (!result)
return 0;
parent_request->copyup_pages = NULL;
parent_request->copyup_page_count = 0;
out_err:
if (pages)
ceph_release_page_vector(pages, page_count);
if (parent_request)
rbd_img_request_put(parent_request);
return result;