drbd: drbd_send_dblock(): Return 0 upon success and an error code otherwise

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 77c957f..2f203ba 100644 (file)
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1537,14 +1537,15 @@ static u32 bio_flags_to_wire(struct drbd_conf *mdev, unsigned long bi_rw)
  */
 int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req)
 {
-       int ok = 1;
+       int err;
        struct p_data p;
        unsigned int dp_flags = 0;
        void *dgb;
        int dgs;
 
-       if (drbd_get_data_sock(mdev->tconn))
-               return 0;
+       err = drbd_get_data_sock(mdev->tconn);
+       if (err)
+               return err;
 
        dgs = (mdev->tconn->agreed_pro_version >= 87 && mdev->tconn->integrity_w_tfm) ?
                crypto_hash_digestsize(mdev->tconn->integrity_w_tfm) : 0;
@@ -1562,14 +1563,14 @@ int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req)
 
        p.dp_flags = cpu_to_be32(dp_flags);
        set_bit(UNPLUG_REMOTE, &mdev->flags);
-       ok = (sizeof(p) ==
-               drbd_send(mdev->tconn, mdev->tconn->data.socket, &p, sizeof(p), dgs ? MSG_MORE : 0));
-       if (ok && dgs) {
+       err = drbd_send_all(mdev->tconn, mdev->tconn->data.socket, &p,
+                           sizeof(p), dgs ? MSG_MORE : 0);
+       if (!err && dgs) {
                dgb = mdev->tconn->int_dig_out;
                drbd_csum_bio(mdev, mdev->tconn->integrity_w_tfm, req->master_bio, dgb);
-               ok = dgs == drbd_send(mdev->tconn, mdev->tconn->data.socket, dgb, dgs, 0);
+               err = drbd_send_all(mdev->tconn, mdev->tconn->data.socket, dgb, dgs, 0);
        }
-       if (ok) {
+       if (!err) {
                /* For protocol A, we have to memcpy the payload into
                 * socket buffers, as we may complete right away
                 * as soon as we handed it over to tcp, at which point the data
@@ -1582,9 +1583,9 @@ int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req)
                 * receiving side, we sure have detected corruption elsewhere.
                 */
                if (mdev->tconn->net_conf->wire_protocol == DRBD_PROT_A || dgs)
-                       ok = !_drbd_send_bio(mdev, req->master_bio);
+                       err = _drbd_send_bio(mdev, req->master_bio);
                else
-                       ok = !_drbd_send_zc_bio(mdev, req->master_bio);
+                       err = _drbd_send_zc_bio(mdev, req->master_bio);
 
                /* double check digest, sometimes buffers have been modified in flight. */
                if (dgs > 0 && dgs <= 64) {
@@ -1604,7 +1605,7 @@ int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req)
 
        drbd_put_data_sock(mdev->tconn);
 
-       return ok;
+       return err;
 }
 
 /* answer packet, used to send data back for read requests:

diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 39b3741..b42ba1a 100644 (file)
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -1264,7 +1264,7 @@ int w_send_dblock(struct drbd_work *w, int cancel)
                return 1;
        }
 
-       ok = drbd_send_dblock(mdev, req);
+       ok = !drbd_send_dblock(mdev, req);
        req_mod(req, ok ? HANDED_OVER_TO_NETWORK : SEND_FAILED);
 
        return ok;