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path: root/drivers/block/rbd.c
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Diffstat (limited to 'drivers/block/rbd.c')
-rw-r--r--drivers/block/rbd.c31
1 files changed, 21 insertions, 10 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 61807c32996e..ad26502f4b0f 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1437,23 +1437,33 @@ fail:
}
/*
- * Request sync osd read
+ * Synchronous osd object method call
*/
static int rbd_req_sync_exec(struct rbd_device *rbd_dev,
const char *object_name,
const char *class_name,
const char *method_name,
- const char *data,
- int len,
+ const char *outbound,
+ size_t outbound_size,
+ int flags,
u64 *ver)
{
struct ceph_osd_req_op *ops;
int class_name_len = strlen(class_name);
int method_name_len = strlen(method_name);
+ int payload_size;
int ret;
- ops = rbd_create_rw_ops(1, CEPH_OSD_OP_CALL,
- class_name_len + method_name_len + len);
+ /*
+ * Any input parameters required by the method we're calling
+ * will be sent along with the class and method names as
+ * part of the message payload. That data and its size are
+ * supplied via the indata and indata_len fields (named from
+ * the perspective of the server side) in the OSD request
+ * operation.
+ */
+ payload_size = class_name_len + method_name_len + outbound_size;
+ ops = rbd_create_rw_ops(1, CEPH_OSD_OP_CALL, payload_size);
if (!ops)
return -ENOMEM;
@@ -1462,13 +1472,12 @@ static int rbd_req_sync_exec(struct rbd_device *rbd_dev,
ops[0].cls.method_name = method_name;
ops[0].cls.method_len = (__u8) method_name_len;
ops[0].cls.argc = 0;
- ops[0].cls.indata = data;
- ops[0].cls.indata_len = len;
+ ops[0].cls.indata = outbound;
+ ops[0].cls.indata_len = outbound_size;
ret = rbd_req_sync_op(rbd_dev, NULL,
CEPH_NOSNAP,
- CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK,
- ops,
+ flags, ops,
object_name, 0, 0, NULL, NULL, ver);
rbd_destroy_ops(ops);
@@ -1780,7 +1789,9 @@ static int rbd_header_add_snap(struct rbd_device *rbd_dev,
ret = rbd_req_sync_exec(rbd_dev, rbd_dev->header_name,
"rbd", "snap_add",
- data, p - data, NULL);
+ data, (size_t) (p - data),
+ CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK,
+ NULL);
kfree(data);