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rbd: set up devices only for mapped images 

Stop setting up Linux devices during the image probe operation.
Instead, set up the devices as a separate step after the image
probe, in rbd_add().

A consequence of this is that only mapped images get devices
assigned to them, which is pretty sweet.

This resolves:
    http://tracker.ceph.com/issues/4774

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-04-28 23:32:34 -05:00 committed by Sage Weil
parent 8ad42cd0c0
commit b536f69a3a
1 changed files with 5 additions and 7 deletions
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12
drivers/block/rbd.c
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@ -4879,10 +4879,6 @@ static int rbd_dev_image_probe(struct rbd_device *rbd_dev)
goto err_out_snaps;
ret = rbd_dev_probe_parent(rbd_dev);
if (ret)
goto err_out_snaps;
ret = rbd_dev_device_setup(rbd_dev);
if (!ret)
return 0;
@ -4964,9 +4960,12 @@ static ssize_t rbd_add(struct bus_type *bus,
if (rc < 0)
goto err_out_rbd_dev;
return count;
rc = rbd_dev_device_setup(rbd_dev);
if (!rc)
return count;
rbd_dev_image_release(rbd_dev);
err_out_rbd_dev:
kfree(rbd_dev->header_name);
rbd_dev_destroy(rbd_dev);
err_out_client:
rbd_put_client(rbdc);
@ -5029,7 +5028,6 @@ static void rbd_dev_remove_parent(struct rbd_device *rbd_dev)
second = third;
}
rbd_assert(second);
rbd_bus_del_dev(second);
rbd_dev_image_release(second);
first->parent = NULL;
first->parent_overlap = 0;