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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>
This commit is contained in:
Alex Elder 2012-07-03 16:01:19 -05:00
parent b8b1e2db52
commit 6e14b1a6c3
1 changed files with 12 additions and 4 deletions
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16
drivers/block/rbd.c
View File

@ -2241,7 +2241,7 @@ static int rbd_dev_v2_features(struct rbd_device *rbd_dev)
&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 @@ static int rbd_dev_v2_snap_context(struct rbd_device *rbd_dev)
"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 @@ static int rbd_dev_v2_probe(struct rbd_device *rbd_dev)
{
size_t size;
int ret;
u64 ver = 0;
/*
* Image id was filled in by the caller. Record the header
@ -2936,11 +2937,18 @@ static int rbd_dev_v2_probe(struct rbd_device *rbd_dev)
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",