From: Douglas Fuller <dfuller@xxxxxxxxxx>
Add a convenience function to osd_client to send Ceph OSD
'class' ops. The interface assumes that the request and
reply data each consist of single pages.
Signed-off-by: Douglas Fuller <dfuller@xxxxxxxxxx>
Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx>
---
include/linux/ceph/osd_client.h | 8 +++++++
net/ceph/osd_client.c | 51 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 59 insertions(+)
diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index 19821a191732..96337b15a60d 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -397,6 +397,14 @@ extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc);
void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc);
+int ceph_osdc_call(struct ceph_osd_client *osdc,
+ struct ceph_object_id *oid,
+ struct ceph_object_locator *oloc,
+ const char *class, const char *method,
+ unsigned int flags,
+ struct page *req_page, size_t req_len,
+ struct page *resp_page, size_t *resp_len);
+
extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
struct ceph_vino vino,
struct ceph_file_layout *layout,
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index dd51ec8ce97f..fbc6b7090c65 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -4027,6 +4027,57 @@ void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
/*
+ * Execute an OSD class method on an object.
+ *
+ * @flags: CEPH_OSD_FLAG_*
+ * @resp_len: out param for reply length
+ */
+int ceph_osdc_call(struct ceph_osd_client *osdc,
+ struct ceph_object_id *oid,
+ struct ceph_object_locator *oloc,
+ const char *class, const char *method,
+ unsigned int flags,
+ struct page *req_page, size_t req_len,
+ struct page *resp_page, size_t *resp_len)
+{
+ struct ceph_osd_request *req;
+ int ret;
+
+ req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
+ if (!req)
+ return -ENOMEM;
+
+ ceph_oid_copy(&req->r_base_oid, oid);
+ ceph_oloc_copy(&req->r_base_oloc, oloc);
+ req->r_flags = flags;
+
+ ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
+ if (ret)
+ goto out_put_req;
+
+ osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
+ if (req_page)
+ osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
+ 0, false, false);
+ if (resp_page)
+ osd_req_op_cls_response_data_pages(req, 0, &resp_page,
+ PAGE_SIZE, 0, false, false);
+
+ ceph_osdc_start_request(osdc, req, false);
+ ret = ceph_osdc_wait_request(osdc, req);
+ if (ret >= 0) {
+ ret = req->r_ops[0].rval;
+ if (resp_page)
+ *resp_len = req->r_ops[0].outdata_len;
+ }
+
+out_put_req:
+ ceph_osdc_put_request(req);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_osdc_call);
+
+/*
* init, shutdown
*/
int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
--
2.4.3
--
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