From 223768d02e2ca5c1747099e03cf949c17aebffd2 Mon Sep 17 00:00:00 2001
From: Ilya Dryomov <idryomov@gmail.com>
Date: Wed, 25 Jan 2017 18:16:23 +0100
Subject: [PATCH] rbd: RBD_V{1,2}_DATA_FORMAT macros
... and also fix up the comment -- format 1 data objects have always
been 12 hex digits long.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jason Dillaman <dillaman@redhat.com>
---
drivers/block/rbd.c | 6 ++----
drivers/block/rbd_types.h | 7 ++++---
2 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index b44b457b4dc78..e10d0708a419a 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1257,18 +1257,16 @@ static void rbd_segment_name_free(const char *name)
static const char *rbd_segment_name(struct rbd_device *rbd_dev, u64 offset)
{
+ const char *name_format = rbd_dev->image_format == 1 ?
+ RBD_V1_DATA_FORMAT : RBD_V2_DATA_FORMAT;
char *name;
u64 segment;
int ret;
- char *name_format;
name = kmem_cache_alloc(rbd_segment_name_cache, GFP_NOIO);
if (!name)
return NULL;
segment = offset >> rbd_dev->header.obj_order;
- name_format = "%s.%012llx";
- if (rbd_dev->image_format == 2)
- name_format = "%s.%016llx";
ret = snprintf(name, CEPH_MAX_OID_NAME_LEN + 1, name_format,
rbd_dev->header.object_prefix, segment);
if (ret < 0 || ret > CEPH_MAX_OID_NAME_LEN) {
diff --git a/drivers/block/rbd_types.h b/drivers/block/rbd_types.h
index be9c76d292f54..62ff50d3e7a6f 100644
--- a/drivers/block/rbd_types.h
+++ b/drivers/block/rbd_types.h
@@ -25,8 +25,8 @@
*/
#define RBD_HEADER_PREFIX "rbd_header."
-#define RBD_DATA_PREFIX "rbd_data."
#define RBD_ID_PREFIX "rbd_id."
+#define RBD_V2_DATA_FORMAT "%s.%016llx"
#define RBD_LOCK_NAME "rbd_lock"
#define RBD_LOCK_TAG "internal"
@@ -42,13 +42,14 @@ enum rbd_notify_op {
/*
* For format version 1, rbd image 'foo' consists of objects
* foo.rbd - image metadata
- * rb.<idhi>.<idlo>.00000000
- * rb.<idhi>.<idlo>.00000001
+ * rb.<idhi>.<idlo>.<extra>.000000000000
+ * rb.<idhi>.<idlo>.<extra>.000000000001
* ... - data
* There is no notion of a persistent image id in rbd format 1.
*/
#define RBD_SUFFIX ".rbd"
+#define RBD_V1_DATA_FORMAT "%s.%012llx"
#define RBD_DIRECTORY "rbd_directory"
#define RBD_INFO "rbd_info"
--
2.30.2