The rbd_dev->mapping field for a parent image is not meaningful.
Since rbd_image_probe() is used both for images being mapped and
their parents, it doesn't make sense to set that flag in that
function.
So move the setting of the mapping.read_only flag out of
rbd_dev_image_probe() and into rbd_add() instead.
This resolves:
http://tracker.ceph.com/issues/4940
Signed-off-by: Alex Elder <[email protected]>
---
drivers/block/rbd.c | 23 +++++++++++------------
1 file changed, 11 insertions(+), 12 deletions(-)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 2a0e9b8..dbfc44a 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -358,7 +358,7 @@ static ssize_t rbd_add(struct bus_type *bus, const
char *buf,
size_t count);
static ssize_t rbd_remove(struct bus_type *bus, const char *buf,
size_t count);
-static int rbd_dev_image_probe(struct rbd_device *rbd_dev, bool read_only);
+static int rbd_dev_image_probe(struct rbd_device *rbd_dev);
static struct bus_attribute rbd_bus_attrs[] = {
__ATTR(add, S_IWUSR, NULL, rbd_add),
@@ -4549,7 +4549,7 @@ static int rbd_dev_probe_parent(struct rbd_device
*rbd_dev)
if (!parent)
goto out_err;
- ret = rbd_dev_image_probe(parent, true);
+ ret = rbd_dev_image_probe(parent);
if (ret < 0)
goto out_err;
rbd_dev->parent = parent;
@@ -4671,10 +4671,9 @@ static void rbd_dev_image_release(struct
rbd_device *rbd_dev)
/*
* Probe for the existence of the header object for the given rbd
- * device. For format 2 images this includes determining the image
- * id.
+ * device.
*/
-static int rbd_dev_image_probe(struct rbd_device *rbd_dev, bool read_only)
+static int rbd_dev_image_probe(struct rbd_device *rbd_dev)
{
int ret;
int tmp;
@@ -4709,12 +4708,6 @@ static int rbd_dev_image_probe(struct rbd_device
*rbd_dev, bool read_only)
if (ret)
goto err_out_probe;
- /* If we are mapping a snapshot it must be marked read-only */
-
- if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
- read_only = true;
- rbd_dev->mapping.read_only = read_only;
-
ret = rbd_dev_probe_parent(rbd_dev);
if (ret)
goto err_out_probe;
@@ -4795,10 +4788,16 @@ static ssize_t rbd_add(struct bus_type *bus,
rbdc = NULL; /* rbd_dev now owns this */
spec = NULL; /* rbd_dev now owns this */
- rc = rbd_dev_image_probe(rbd_dev, read_only);
+ rc = rbd_dev_image_probe(rbd_dev);
if (rc < 0)
goto err_out_rbd_dev;
+ /* If we are mapping a snapshot it must be marked read-only */
+
+ if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
+ read_only = true;
+ rbd_dev->mapping.read_only = read_only;
+
rc = rbd_dev_device_setup(rbd_dev);
if (!rc)
return count;
--
1.7.9.5
--
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