From 1486df0e312613c6f235ee08488c90cc6b987094 Mon Sep 17 00:00:00 2001
From: "Denis V. Lunev" <den@openvz.org>
Date: Fri, 30 Jan 2015 11:42:11 +0300
Subject: [PATCH] block/raw-posix: create translate_err helper to merge errno
 values

actually the code
    if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP ||
        ret == -ENOTTY) {
        ret = -ENOTSUP;
    }
is present twice and will be added a couple more times. Create helper
for this.

CC: Kevin Wolf <kwolf@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Peter Lieven <pl@kamp.de>
CC: Fam Zheng <famz@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/raw-posix.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/block/raw-posix.c b/block/raw-posix.c
index e51293a455..24300d0f78 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -893,6 +893,15 @@ static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes)
 }
 #endif
 
+static int translate_err(int err)
+{
+    if (err == -ENODEV || err == -ENOSYS || err == -EOPNOTSUPP ||
+        err == -ENOTTY) {
+        err = -ENOTSUP;
+    }
+    return err;
+}
+
 static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb)
 {
     int ret = -EOPNOTSUPP;
@@ -921,10 +930,9 @@ static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb)
 #endif
     }
 
-    if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP ||
-        ret == -ENOTTY) {
+    ret = translate_err(ret);
+    if (ret == -ENOTSUP) {
         s->has_write_zeroes = false;
-        ret = -ENOTSUP;
     }
     return ret;
 }
@@ -968,10 +976,9 @@ static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb)
 #endif
     }
 
-    if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP ||
-        ret == -ENOTTY) {
+    ret = translate_err(ret);
+    if (ret == -ENOTSUP) {
         s->has_discard = false;
-        ret = -ENOTSUP;
     }
     return ret;
 }