libceph: define ceph_osd_data_length()
One more osd data helper, which returns the length of the
data item, regardless of its type.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index b399e8a..e197c5c 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -117,6 +117,25 @@
EXPORT_SYMBOL(ceph_osd_data_bio_init);
#endif /* CONFIG_BLOCK */
+static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
+{
+ switch (osd_data->type) {
+ case CEPH_OSD_DATA_TYPE_NONE:
+ return 0;
+ case CEPH_OSD_DATA_TYPE_PAGES:
+ return osd_data->length;
+ case CEPH_OSD_DATA_TYPE_PAGELIST:
+ return (u64)osd_data->pagelist->length;
+#ifdef CONFIG_BLOCK
+ case CEPH_OSD_DATA_TYPE_BIO:
+ return (u64)osd_data->bio_length;
+#endif /* CONFIG_BLOCK */
+ default:
+ WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
+ return 0;
+ }
+}
+
static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
{
if (osd_data->type != CEPH_OSD_DATA_TYPE_PAGES)
@@ -1887,17 +1906,19 @@
static void ceph_osdc_msg_data_set(struct ceph_msg *msg,
struct ceph_osd_data *osd_data)
{
+ u64 length = ceph_osd_data_length(osd_data);
+
if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
- BUG_ON(osd_data->length > (u64) SIZE_MAX);
- if (osd_data->length)
+ BUG_ON(length > (u64) SIZE_MAX);
+ if (length)
ceph_msg_data_set_pages(msg, osd_data->pages,
- osd_data->length, osd_data->alignment);
+ length, osd_data->alignment);
} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
- BUG_ON(!osd_data->pagelist->length);
+ BUG_ON(!length);
ceph_msg_data_set_pagelist(msg, osd_data->pagelist);
#ifdef CONFIG_BLOCK
} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
- ceph_msg_data_set_bio(msg, osd_data->bio, osd_data->bio_length);
+ ceph_msg_data_set_bio(msg, osd_data->bio, length);
#endif
} else {
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);