When rbd creates an object request containing an object method call
operation it is passing 0 for the size. I originally thought this
was because the length was not needed for method calls, but I think
it really should be supplied, to describe how much space is
available to receive response data. So provide the supplied length.
This resolves:
http://tracker.ceph.com/issues/4659
Signed-off-by: Alex Elder <elder@xxxxxxxxxxx>
---
drivers/block/rbd.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 9fb51b5..5e579fa 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1839,12 +1839,11 @@ static int rbd_obj_method_sync(struct rbd_device
*rbd_dev,
int ret;
/*
- * Method calls are ultimately read operations but they
- * don't involve object data (so no offset or length).
- * The result should placed into the inbound buffer
- * provided. They also supply outbound data--parameters for
- * the object method. Currently if this is present it will
- * be a snapshot id.
+ * Method calls are ultimately read operations. The result
+ * should placed into the inbound buffer provided. They
+ * also supply outbound data--parameters for the object
+ * method. Currently if this is present it will be a
+ * snapshot id.
*/
page_count = (u32) calc_pages_for(0, inbound_size);
pages = ceph_alloc_page_vector(page_count, GFP_KERNEL);
@@ -1852,7 +1851,7 @@ static int rbd_obj_method_sync(struct rbd_device
*rbd_dev,
return PTR_ERR(pages);
ret = -ENOMEM;
- obj_request = rbd_obj_request_create(object_name, 0, 0,
+ obj_request = rbd_obj_request_create(object_name, 0, inbound_size,
OBJ_REQUEST_PAGES);
if (!obj_request)
goto out;
--
1.7.9.5
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