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rbd: set mapping info earlier 

Set the mapping size and features earlier in rbd_dev_probe_finish().

Define rbd_dev_mapping_clear() as an inverse for setting those
fields, and use it both in error handling in rbd_dev_image_probe()
and in the final cleanup in rbd_dev_release().  Change the name
of rbd_dev_set_mapping() to of rbd_dev_mapping_set().

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-04-27 09:59:30 -05:00 committed by Sage Weil
parent 05a46afdc7
commit d1cf578845
1 changed files with 15 additions and 6 deletions
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21
drivers/block/rbd.c
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@ -866,7 +866,7 @@ static struct rbd_snap *snap_by_name(struct rbd_device *rbd_dev,
return NULL;
}
static int rbd_dev_set_mapping(struct rbd_device *rbd_dev)
static int rbd_dev_mapping_set(struct rbd_device *rbd_dev)
{
if (!memcmp(rbd_dev->spec->snap_name, RBD_SNAP_HEAD_NAME,
sizeof (RBD_SNAP_HEAD_NAME))) {
@ -886,6 +886,13 @@ static int rbd_dev_set_mapping(struct rbd_device *rbd_dev)
return 0;
}
static void rbd_dev_mapping_clear(struct rbd_device *rbd_dev)
{
rbd_dev->mapping.size = 0;
rbd_dev->mapping.features = 0;
rbd_dev->mapping.read_only = true;
}
static void rbd_header_free(struct rbd_image_header *header)
{
kfree(header->object_prefix);
@ -4757,7 +4764,11 @@ static int rbd_dev_probe_finish(struct rbd_device *rbd_dev)
if (ret)
goto err_out_snaps;
ret = rbd_dev_set_mapping(rbd_dev);
ret = rbd_dev_header_watch_sync(rbd_dev, 1);
if (ret)
goto err_out_snaps;
ret = rbd_dev_mapping_set(rbd_dev);
if (ret)
goto err_out_snaps;
@ -4790,10 +4801,6 @@ static int rbd_dev_probe_finish(struct rbd_device *rbd_dev)
if (ret)
goto err_out_bus;
ret = rbd_dev_header_watch_sync(rbd_dev, 1);
if (ret)
goto err_out_bus;
/* Everything's ready. Announce the disk to the world. */
set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
@ -4817,6 +4824,7 @@ err_out_blkdev:
unregister_blkdev(rbd_dev->major, rbd_dev->name);
err_out_id:
rbd_dev_id_put(rbd_dev);
rbd_dev_mapping_clear(rbd_dev);
err_out_snaps:
rbd_remove_all_snaps(rbd_dev);
@ -4974,6 +4982,7 @@ static void rbd_dev_release(struct device *dev)
/* done with the id, and with the rbd_dev */
rbd_dev_id_put(rbd_dev);
rbd_dev_mapping_clear(rbd_dev);
rbd_assert(rbd_dev->rbd_client != NULL);
rbd_spec_put(rbd_dev->parent_spec);
kfree(rbd_dev->header_name);