From: Keir Fraser <keir.fraser@citrix.com>
Date: Mon, 12 Apr 2010 06:22:16 +0000 (+0100)
Subject: libxc: Flush I/O before xc_domain_save completion
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~12414
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success//%22http:/www.example.com/cgi/success/?a=commitdiff_plain;h=560f4dc7f29e3c5f79728bc01b2dd4828e55b673;p=xen.git

libxc: Flush I/O before xc_domain_save completion

The final, flushing call to discard_file_cache also discards any
errors from fsync. Call fsync explicitly before leaving, to check if
all VM memory actually made it to the disk.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
---

diff --git a/tools/libxc/xc_domain_save.c b/tools/libxc/xc_domain_save.c
index 2334b49c07..cb98374e02 100644
--- a/tools/libxc/xc_domain_save.c
+++ b/tools/libxc/xc_domain_save.c
@@ -1764,6 +1764,13 @@ int xc_domain_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
         goto out;
     }
 
+    /* Flush last write and check for errors. */
+    if ( fsync(io_fd) && errno != EINVAL )
+    {
+        PERROR("Error when flushing state file");
+        goto out;
+    }
+
     /* Success! */
     rc = 0;