[sheepdog] [PATCH v4 04/10] sheepdog: handle vdi objects in resend_aio_req

[MORITA Kazutaka]

The current resend_aio_req() doesn't work when the request is against
vdi objects.  This fixes the problem.

Tested-and-reviewed-by: Liu Yuan <namei.unix at gmail.com>
Signed-off-by: MORITA Kazutaka <morita.kazutaka at lab.ntt.co.jp>
---
 block/sheepdog.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/block/sheepdog.c b/block/sheepdog.c
index c6e9b89..fae17ac 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1209,11 +1209,15 @@ static int coroutine_fn resend_aioreq(BDRVSheepdogState *s, AIOReq *aio_req)
         return ret;
     }
 
-    aio_req->oid = vid_to_data_oid(s->inode.vdi_id,
-                                   data_oid_to_idx(aio_req->oid));
+    if (is_data_obj(aio_req->oid)) {
+        aio_req->oid = vid_to_data_oid(s->inode.vdi_id,
+                                       data_oid_to_idx(aio_req->oid));
+    } else {
+        aio_req->oid = vid_to_vdi_oid(s->inode.vdi_id);
+    }
 
     /* check whether this request becomes a CoW one */
-    if (acb->aiocb_type == AIOCB_WRITE_UDATA) {
+    if (acb->aiocb_type == AIOCB_WRITE_UDATA && is_data_obj(aio_req->oid)) {
         int idx = data_oid_to_idx(aio_req->oid);
         AIOReq *areq;
 
@@ -1241,8 +1245,15 @@ static int coroutine_fn resend_aioreq(BDRVSheepdogState *s, AIOReq *aio_req)
         create = true;
     }
 out:
-    return add_aio_request(s, aio_req, acb->qiov->iov, acb->qiov->niov,
-                           create, acb->aiocb_type);
+    if (is_data_obj(aio_req->oid)) {
+        return add_aio_request(s, aio_req, acb->qiov->iov, acb->qiov->niov,
+                               create, acb->aiocb_type);
+    } else {
+        struct iovec iov;
+        iov.iov_base = &s->inode;
+        iov.iov_len = sizeof(s->inode);
+        return add_aio_request(s, aio_req, &iov, 1, false, AIOCB_WRITE_UDATA);
+    }
 }
 
 /* TODO Convert to fine grained options */
-- 
1.8.1.3.566.gaa39828