rbd: update remaining header fields for v2
There are three fields that are not yet updated for format 2 rbd
image headers: the version of the header object; the encryption
type; and the compression type. There is no interface defined for
fetching the latter two, so just initialize them explicitly to 0 for
now.
Change rbd_dev_v2_snap_context() so the caller can be supplied the
version for the header object.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index b51f1c9..2f1bef8 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2241,7 +2241,7 @@
&rbd_dev->header.features);
}
-static int rbd_dev_v2_snap_context(struct rbd_device *rbd_dev)
+static int rbd_dev_v2_snap_context(struct rbd_device *rbd_dev, u64 *ver)
{
size_t size;
int ret;
@@ -2269,7 +2269,7 @@
"rbd", "get_snapcontext",
NULL, 0,
reply_buf, size,
- CEPH_OSD_FLAG_READ, NULL);
+ CEPH_OSD_FLAG_READ, ver);
dout("%s: rbd_req_sync_exec returned %d\n", __func__, ret);
if (ret < 0)
goto out;
@@ -2906,6 +2906,7 @@
{
size_t size;
int ret;
+ u64 ver = 0;
/*
* Image id was filled in by the caller. Record the header
@@ -2936,11 +2937,18 @@
if (ret < 0)
goto out_err;
- /* Get the snapshot context */
+ /* crypto and compression type aren't (yet) supported for v2 images */
- ret = rbd_dev_v2_snap_context(rbd_dev);
+ rbd_dev->header.crypt_type = 0;
+ rbd_dev->header.comp_type = 0;
+
+ /* Get the snapshot context, plus the header version */
+
+ ret = rbd_dev_v2_snap_context(rbd_dev, &ver);
if (ret)
goto out_err;
+ rbd_dev->header.obj_version = ver;
+
rbd_dev->image_format = 2;
dout("discovered version 2 image, header name is %s\n",