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| author | Alex Elder <elder@inktank.com> | 2013-05-10 16:29:22 -0500 |
|---|---|---|
| committer | Alex Elder <elder@inktank.com> | 2013-05-13 14:12:40 -0500 |
| commit | b91f09f17b2a302f07022e2f766969e2536d71b3 (patch) | |
| tree | eb26ac4e2aa995cf45c2c6bdbbd4d62b49f1dc24 /drivers | |
| parent | ebda6408f2227a774343c3cc2861384942143ff3 (diff) | |
| download | linux-b91f09f17b2a302f07022e2f766969e2536d71b3.tar.gz linux-b91f09f17b2a302f07022e2f766969e2536d71b3.tar.bz2 linux-b91f09f17b2a302f07022e2f766969e2536d71b3.zip | |
rbd: support reading parent page data for writes
Currently, rbd_img_obj_parent_read_full() 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.
This is handling the same kind of issue as was resolved by this
commit:
5b2ab72d rbd: support reading parent page data
This resolves:
http://tracker.ceph.com/issues/5027
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/rbd.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 597b9bbe2fc7..5161e80a38ef 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2165,6 +2165,8 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) u32 page_count; int result; u64 parent_length; + u64 offset; + u64 length; rbd_assert(img_request_child_test(img_request)); @@ -2179,7 +2181,7 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) orig_request = img_request->obj_request; rbd_assert(orig_request != NULL); - rbd_assert(orig_request->type == OBJ_REQUEST_BIO); + rbd_assert(obj_request_type_valid(orig_request->type)); result = img_request->result; parent_length = img_request->length; rbd_assert(parent_length == img_request->xferred); @@ -2211,11 +2213,17 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) /* Then the original write request op */ + offset = orig_request->offset; + length = orig_request->length; osd_req_op_extent_init(osd_req, 1, CEPH_OSD_OP_WRITE, - orig_request->offset, - orig_request->length, 0, 0); - osd_req_op_extent_osd_data_bio(osd_req, 1, orig_request->bio_list, - orig_request->length); + offset, length, 0, 0); + if (orig_request->type == OBJ_REQUEST_BIO) + osd_req_op_extent_osd_data_bio(osd_req, 1, + orig_request->bio_list, length); + else + osd_req_op_extent_osd_data_pages(osd_req, 1, + orig_request->pages, length, + offset & ~PAGE_MASK, false, false); rbd_osd_req_format_write(orig_request); @@ -2261,7 +2269,7 @@ static int rbd_img_obj_parent_read_full(struct rbd_obj_request *obj_request) int result; rbd_assert(obj_request_img_data_test(obj_request)); - rbd_assert(obj_request->type == OBJ_REQUEST_BIO); + rbd_assert(obj_request_type_valid(obj_request->type)); img_request = obj_request->img_request; rbd_assert(img_request != NULL); |