libceph: add ceph_osdc_call() single-page helper
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@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Mike Christie <mchristi@redhat.com> Reviewed-by: Alex Elder <elder@linaro.org>
This commit is contained in:
parent
a4ed38d7a1
commit
428a715811
|
@ -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,
|
||||
|
|
|
@ -4026,6 +4026,57 @@ 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
|
||||
*/
|
||||
|
|
Loading…
Reference in a new issue