nbd-server: don't check length and offset on flush

[nbd.git] / nbd-server.c

diff --git a/nbd-server.c b/nbd-server.c
index 602d42e..21fa563 100644 (file)
--- a/nbd-server.c
+++ b/nbd-server.c
@@ -1452,17 +1452,19 @@ int mainloop(CLIENT *client) {
                                "READ", (unsigned long long)request.from,
                                (unsigned long long)request.from / 512, len);
 #endif
-               memcpy(reply.handle, request.handle, sizeof(reply.handle));
-               if ((request.from + len) > (OFFT_MAX)) {
-                       DEBUG("[Number too large!]");
-                       ERROR(client, reply, EINVAL);
-                       continue;
-               }
+               if ((command==NBD_CMD_WRITE) || (command==NBD_CMD_READ)) {
+                       memcpy(reply.handle, request.handle, sizeof(reply.handle));
+                       if ((request.from + len) > (OFFT_MAX)) {
+                               DEBUG("[Number too large!]");
+                               ERROR(client, reply, EINVAL);
+                               continue;
+                       }
 
-               if (((ssize_t)((off_t)request.from + len) > client->exportsize)) {
-                       DEBUG("[RANGE!]");
-                       ERROR(client, reply, EINVAL);
-                       continue;
+                       if (((ssize_t)((off_t)request.from + len) > client->exportsize)) {
+                               DEBUG("[RANGE!]");
+                               ERROR(client, reply, EINVAL);
+                               continue;
+                       }
                }
 
                if (command==NBD_CMD_WRITE) {