The patch below does not apply to the 3.14-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

>From 314672a2c2780212fb770bb02d2fffaa1019823f Mon Sep 17 00:00:00 2001
From: "K. Y. Srinivasan" <[email protected]>
Date: Wed, 9 Apr 2014 17:24:16 -0700
Subject: [PATCH] Tools: hv: Handle the case when the target file exists
 correctly

Return the appropriate error code and handle the case when the target
file exists correctly. This fixes a bug.

Signed-off-by: K. Y. Srinivasan <[email protected]>
Cc: <[email protected]> [3.14]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

diff --git a/include/uapi/linux/hyperv.h b/include/uapi/linux/hyperv.h
index 9beb7c991638..78e4a86030dd 100644
--- a/include/uapi/linux/hyperv.h
+++ b/include/uapi/linux/hyperv.h
@@ -305,6 +305,7 @@ enum hv_kvp_exchg_pool {
 #define HV_ERROR_DEVICE_NOT_CONNECTED  0x8007048F
 #define HV_INVALIDARG                  0x80070057
 #define HV_GUID_NOTFOUND               0x80041002
+#define HV_ERROR_ALREADY_EXISTS                0x80070050
 
 #define ADDR_FAMILY_NONE       0x00
 #define ADDR_FAMILY_IPV4       0x01
diff --git a/tools/hv/hv_fcopy_daemon.c b/tools/hv/hv_fcopy_daemon.c
index 4ecc4fd0bc1b..fba1c75aa484 100644
--- a/tools/hv/hv_fcopy_daemon.c
+++ b/tools/hv/hv_fcopy_daemon.c
@@ -82,8 +82,10 @@ static int hv_start_fcopy(struct hv_start_fcopy *smsg)
 
        if (!access(target_fname, F_OK)) {
                syslog(LOG_INFO, "File: %s exists", target_fname);
-               if (!smsg->copy_flags & OVER_WRITE)
+               if (!(smsg->copy_flags & OVER_WRITE)) {
+                       error = HV_ERROR_ALREADY_EXISTS;
                        goto done;
+               }
        }
 
        target_fd = open(target_fname, O_RDWR | O_CREAT | O_CLOEXEC, 0744);

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