An OSD object method call can be made using rbd_req_sync_exec(). Until now this has only been used for creating a new RBD snapshot, and that has only required sending data out, not receiving anything back from the OSD.
We will now need to get data back from an OSD on a method call, so add parameters to rbd_req_sync_exec() that allow a buffer into which returned data should be placed to be specified, along with its size. Previously, rbd_req_sync_exec() passed a null pointer and zero size to rbd_req_sync_op(); change this so the new inbound buffer information is provided instead. Rename the "buf" and "len" parameters in rbd_req_sync_op() to make it more obvious they are describing inbound data. Signed-off-by: Alex Elder <[email protected]> --- drivers/block/rbd.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 4e84f99..ba68566 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1098,8 +1098,8 @@ static int rbd_req_sync_op(struct rbd_device *rbd_dev, int flags, struct ceph_osd_req_op *ops, const char *object_name, - u64 ofs, u64 len, - char *buf, + u64 ofs, u64 inbound_size, + char *inbound, struct ceph_osd_request **linger_req, u64 *ver) { @@ -1109,13 +1109,13 @@ static int rbd_req_sync_op(struct rbd_device *rbd_dev, rbd_assert(ops != NULL); - num_pages = calc_pages_for(ofs , len); + num_pages = calc_pages_for(ofs, inbound_size); pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); if (IS_ERR(pages)) return PTR_ERR(pages); ret = rbd_do_request(NULL, rbd_dev, snapc, snapid, - object_name, ofs, len, NULL, + object_name, ofs, inbound_size, NULL, pages, num_pages, flags, ops, @@ -1125,8 +1125,8 @@ static int rbd_req_sync_op(struct rbd_device *rbd_dev, if (ret < 0) goto done; - if ((flags & CEPH_OSD_FLAG_READ) && buf) - ret = ceph_copy_from_page_vector(pages, buf, ofs, ret); + if ((flags & CEPH_OSD_FLAG_READ) && inbound) + ret = ceph_copy_from_page_vector(pages, inbound, ofs, ret); done: ceph_release_page_vector(pages, num_pages); @@ -1445,6 +1445,8 @@ static int rbd_req_sync_exec(struct rbd_device *rbd_dev, const char *method_name, const char *outbound, size_t outbound_size, + char *inbound, + size_t inbound_size, int flags, u64 *ver) { @@ -1478,7 +1480,8 @@ static int rbd_req_sync_exec(struct rbd_device *rbd_dev, ret = rbd_req_sync_op(rbd_dev, NULL, CEPH_NOSNAP, flags, ops, - object_name, 0, 0, NULL, NULL, ver); + object_name, 0, inbound_size, inbound, + NULL, ver); rbd_destroy_ops(ops); @@ -1789,7 +1792,7 @@ static int rbd_header_add_snap(struct rbd_device *rbd_dev, ret = rbd_req_sync_exec(rbd_dev, rbd_dev->header_name, "rbd", "snap_add", - data, (size_t) (p - data), + data, (size_t) (p - data), NULL, 0, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, NULL); -- 1.7.9.5 -- 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
