nbd/server: rename rc to ret

For consistency use 'ret' name for saving return code everywhere
in the file.
Signed-off-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Message-Id: <20170602150150.258222-12-vsementsov@virtuozzo.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

nbd/server.c

@@ -211,15 +211,15 @@ static int nbd_negotiate_send_rep_list(QIOChannel *ioc, NBDExport *exp)
     uint32_t len;
     const char *name = exp->name ? exp->name : "";
     const char *desc = exp->description ? exp->description : "";
-    int rc;
+    int ret;
 
     TRACE("Advertising export name '%s' description '%s'", name, desc);
     name_len = strlen(name);
     desc_len = strlen(desc);
     len = name_len + desc_len + sizeof(len);
-    rc = nbd_negotiate_send_rep_len(ioc, NBD_REP_SERVER, NBD_OPT_LIST, len);
-    if (rc < 0) {
-        return rc;
+    ret = nbd_negotiate_send_rep_len(ioc, NBD_REP_SERVER, NBD_OPT_LIST, len);
+    if (ret < 0) {
+        return ret;
     }
 
     len = cpu_to_be32(name_len);
@@ -536,7 +536,7 @@ static int nbd_negotiate_options(NBDClient *client)
 static coroutine_fn int nbd_negotiate(NBDClient *client)
 {
     char buf[8 + 8 + 8 + 128];
-    int rc;
+    int ret;
     const uint16_t myflags = (NBD_FLAG_HAS_FLAGS | NBD_FLAG_SEND_TRIM |
                               NBD_FLAG_SEND_FLUSH | NBD_FLAG_SEND_FUA |
                               NBD_FLAG_SEND_WRITE_ZEROES);
@@ -593,10 +593,10 @@ static coroutine_fn int nbd_negotiate(NBDClient *client)
             LOG("write failed");
             return -EINVAL;
         }
-        rc = nbd_negotiate_options(client);
-        if (rc != 0) {
+        ret = nbd_negotiate_options(client);
+        if (ret != 0) {
             LOG("option negotiation failed");
-            return rc;
+            return ret;
         }
 
         TRACE("advertising size %" PRIu64 " and flags %x",
@@ -604,10 +604,10 @@ static coroutine_fn int nbd_negotiate(NBDClient *client)
         stq_be_p(buf + 18, client->exp->size);
         stw_be_p(buf + 26, client->exp->nbdflags | myflags);
         len = client->no_zeroes ? 10 : sizeof(buf) - 18;
-        rc = nbd_write(client->ioc, buf + 18, len, NULL);
-        if (rc < 0) {
+        ret = nbd_write(client->ioc, buf + 18, len, NULL);
+        if (ret < 0) {
             LOG("write failed");
-            return rc;
+            return ret;
         }
     }
 
@@ -963,21 +963,21 @@ void nbd_export_close_all(void)
 static int nbd_co_send_reply(NBDRequestData *req, NBDReply *reply, int len)
 {
     NBDClient *client = req->client;
-    int rc;
+    int ret;
 
     g_assert(qemu_in_coroutine());
     qemu_co_mutex_lock(&client->send_lock);
     client->send_coroutine = qemu_coroutine_self();
 
     if (!len) {
-        rc = nbd_send_reply(client->ioc, reply);
+        ret = nbd_send_reply(client->ioc, reply);
     } else {
         qio_channel_set_cork(client->ioc, true);
-        rc = nbd_send_reply(client->ioc, reply);
-        if (rc == 0) {
-            rc = nbd_write(client->ioc, req->data, len, NULL);
-            if (rc < 0) {
-                rc = -EIO;
+        ret = nbd_send_reply(client->ioc, reply);
+        if (ret == 0) {
+            ret = nbd_write(client->ioc, req->data, len, NULL);
+            if (ret < 0) {
+                ret = -EIO;
             }
         }
         qio_channel_set_cork(client->ioc, false);
@@ -985,7 +985,7 @@ static int nbd_co_send_reply(NBDRequestData *req, NBDReply *reply, int len)
 
     client->send_coroutine = NULL;
     qemu_co_mutex_unlock(&client->send_lock);
-    return rc;
+    return ret;
 }
 
 /* nbd_co_receive_request