target-i386: ROR r8/r16 imm instruction fix

[qemu.git] / nbd.c

diff --git a/nbd.c b/nbd.c
index 761f4ec826682ab6992c99edad2ff8a4639254e1..2606403a41facd02d5b50d14dcd407b3aa62bd1c 100644 (file)
--- a/nbd.c
+++ b/nbd.c
@@ -844,13 +844,11 @@ void nbd_client_close(NBDClient *client)
 static NBDRequest *nbd_request_get(NBDClient *client)
 {
     NBDRequest *req;
-    NBDExport *exp = client->exp;
 
     assert(client->nb_requests <= MAX_NBD_REQUESTS - 1);
     client->nb_requests++;
 
     req = g_slice_new0(NBDRequest);
-    req->data = qemu_blockalign(exp->bs, NBD_BUFFER_SIZE);
     nbd_client_get(client);
     req->client = client;
     return req;
@@ -860,7 +858,9 @@ static void nbd_request_put(NBDRequest *req)
 {
     NBDClient *client = req->client;
 
-    qemu_vfree(req->data);
+    if (req->data) {
+        qemu_vfree(req->data);
+    }
     g_slice_free(NBDRequest, req);
 
     if (client->nb_requests-- == MAX_NBD_REQUESTS) {
@@ -1007,6 +1007,7 @@ static ssize_t nbd_co_receive_request(NBDRequest *req, struct nbd_request *reque
 {
     NBDClient *client = req->client;
     int csock = client->sock;
+    uint32_t command;
     ssize_t rc;
 
     client->recv_coroutine = qemu_coroutine_self();
@@ -1018,9 +1019,9 @@ static ssize_t nbd_co_receive_request(NBDRequest *req, struct nbd_request *reque
         goto out;
     }
 
-    if (request->len > NBD_BUFFER_SIZE) {
+    if (request->len > NBD_MAX_BUFFER_SIZE) {
         LOG("len (%u) is larger than max len (%u)",
-            request->len, NBD_BUFFER_SIZE);
+            request->len, NBD_MAX_BUFFER_SIZE);
         rc = -EINVAL;
         goto out;
     }
@@ -1034,7 +1035,11 @@ static ssize_t nbd_co_receive_request(NBDRequest *req, struct nbd_request *reque
 
     TRACE("Decoding type");
 
-    if ((request->type & NBD_CMD_MASK_COMMAND) == NBD_CMD_WRITE) {
+    command = request->type & NBD_CMD_MASK_COMMAND;
+    if (command == NBD_CMD_READ || command == NBD_CMD_WRITE) {
+        req->data = qemu_blockalign(client->exp->bs, request->len);
+    }
+    if (command == NBD_CMD_WRITE) {
         TRACE("Reading %u byte(s)", request->len);
 
         if (qemu_co_recv(csock, req->data, request->len) != request->len) {