From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 19 Apr 2012 09:59:11 +0000 (+0200)
Subject: nbd: obey FUA on reads
X-Git-Tag: TizenStudio_2.0_p2.3.2~208^2~4225^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e25ceb76e5b90ec4197cbe1cb859200bf6ee1284;p=sdk%2Femulator%2Fqemu.git

nbd: obey FUA on reads

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/nbd.c b/nbd.c
index d4dafc6..153709f 100644
--- a/nbd.c
+++ b/nbd.c
@@ -842,6 +842,15 @@ static void nbd_trip(void *opaque)
     case NBD_CMD_READ:
         TRACE("Request type is READ");
 
+        if (request.type & NBD_CMD_FLAG_FUA) {
+            ret = bdrv_co_flush(exp->bs);
+            if (ret < 0) {
+                LOG("flush failed");
+                reply.error = -ret;
+                goto error_reply;
+            }
+        }
+
         ret = bdrv_read(exp->bs, (request.from + exp->dev_offset) / 512,
                         req->data, request.len / 512);
         if (ret < 0) {