On 10/26/2012 03:45 PM, Alex Elder wrote:
If rbd_dev_snaps_update() has ever been called for an rbd device
structure there could be snapshot structures on its snaps list.
In rbd_add(), this function is called but a subsequent error
path neglected to clean up any of these snapshots.
Add a call to rbd_remove_all_snaps() in the appropriate spot to
remedy this. Change a couple of error labels to be a little
clearer while there.
And drop the leading underscorse from the function name; there's
underscores
nothing special about that function that they might signify.
These could be removed for __rbd_remove_snap_dev() too.
Signed-off-by: Alex Elder <elder@xxxxxxxxxxx>
---
Reviewed-by: Josh Durgin <josh.durgin@xxxxxxxxxxx>
drivers/block/rbd.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index cc06c55..147c8df 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1787,7 +1787,7 @@ static int rbd_read_header(struct rbd_device *rbd_dev,
return ret;
}
-static void __rbd_remove_all_snaps(struct rbd_device *rbd_dev)
+static void rbd_remove_all_snaps(struct rbd_device *rbd_dev)
{
struct rbd_snap *snap;
struct rbd_snap *next;
@@ -3179,11 +3179,11 @@ static ssize_t rbd_add(struct bus_type *bus,
/* no need to lock here, as rbd_dev is not registered yet */
rc = rbd_dev_snaps_update(rbd_dev);
if (rc)
- goto err_out_header;
+ goto err_out_probe;
rc = rbd_dev_set_mapping(rbd_dev, snap_name);
if (rc)
- goto err_out_header;
+ goto err_out_snaps;
/* generate unique id: find highest unique id, add one */
rbd_dev_id_get(rbd_dev);
@@ -3247,7 +3247,9 @@ err_out_blkdev:
unregister_blkdev(rbd_dev->major, rbd_dev->name);
err_out_id:
rbd_dev_id_put(rbd_dev);
-err_out_header:
+err_out_snaps:
+ rbd_remove_all_snaps(rbd_dev);
+err_out_probe:
rbd_header_free(&rbd_dev->header);
err_out_client:
kfree(rbd_dev->header_name);
@@ -3345,7 +3347,7 @@ static ssize_t rbd_remove(struct bus_type *bus,
goto done;
}
- __rbd_remove_all_snaps(rbd_dev);
+ rbd_remove_all_snaps(rbd_dev);
rbd_bus_del_dev(rbd_dev);
done:
--
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