libceph: set the data pointers when encoding ops
Still using the osd request r_data_in and r_data_out pointer, but
we're basically only referring to it via the data pointers in the
osd ops. And we're transferring that information to the request
or reply message only when the op indicates it's needed, in
osd_req_encode_op().
To avoid a forward reference, ceph_osdc_msg_data_set() was moved up
in the file.
Don't bother calling ceph_osd_data_init(), in ceph_osd_alloc(),
because the ops array will already be zeroed anyway.
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 86cb524..cc4003f 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -339,9 +339,6 @@
}
req->r_reply = msg;
- ceph_osd_data_init(&req->r_data_in);
- ceph_osd_data_init(&req->r_data_out);
-
/* create request message; allow space for oid */
if (use_mempool)
msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
@@ -549,6 +546,28 @@
}
EXPORT_SYMBOL(osd_req_op_watch_init);
+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(length > (u64) SIZE_MAX);
+ if (length)
+ ceph_msg_data_set_pages(msg, osd_data->pages,
+ length, osd_data->alignment);
+ } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
+ 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, length);
+#endif
+ } else {
+ BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
+ }
+}
+
static u64 osd_req_encode_op(struct ceph_osd_request *req,
struct ceph_osd_op *dst, unsigned int which)
{
@@ -576,17 +595,24 @@
cpu_to_le64(src->extent.truncate_size);
dst->extent.truncate_seq =
cpu_to_le32(src->extent.truncate_seq);
- if (src->op == CEPH_OSD_OP_WRITE)
+ if (src->op == CEPH_OSD_OP_WRITE) {
WARN_ON(src->extent.osd_data != &req->r_data_out);
- else
+ ceph_osdc_msg_data_set(req->r_request,
+ src->extent.osd_data);
+ } else {
WARN_ON(src->extent.osd_data != &req->r_data_in);
+ ceph_osdc_msg_data_set(req->r_reply,
+ src->extent.osd_data);
+ }
break;
case CEPH_OSD_OP_CALL:
dst->cls.class_len = src->cls.class_len;
dst->cls.method_len = src->cls.method_len;
dst->cls.indata_len = cpu_to_le32(src->cls.request_data_len);
WARN_ON(src->cls.response_data != &req->r_data_in);
+ ceph_osdc_msg_data_set(req->r_reply, src->cls.response_data);
WARN_ON(src->cls.request_info != &req->r_data_out);
+ ceph_osdc_msg_data_set(req->r_request, src->cls.request_info);
BUG_ON(src->cls.request_info->type !=
CEPH_OSD_DATA_TYPE_PAGELIST);
request_data_len = src->cls.request_info->pagelist->length;
@@ -1930,28 +1956,6 @@
return;
}
-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(length > (u64) SIZE_MAX);
- if (length)
- ceph_msg_data_set_pages(msg, osd_data->pages,
- length, osd_data->alignment);
- } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
- 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, length);
-#endif
- } else {
- BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
- }
-}
-
/*
* build new request AND message
*
@@ -1967,11 +1971,6 @@
u64 data_len;
unsigned int i;
- /* Set up response incoming data and request outgoing data fields */
-
- ceph_osdc_msg_data_set(req->r_reply, &req->r_data_in);
- ceph_osdc_msg_data_set(req->r_request, &req->r_data_out);
-
req->r_snapid = snap_id;
req->r_snapc = ceph_get_snap_context(snapc);