[PATCH v4 12/16] hw/9pfs: Translate Windows errno to Linux value

[Bin Meng]

From: Guohuai Shi <guohuai.shi@windriver.com>

Some of Windows error numbers have different value from Linux ones.
For example, ENOTEMPTY is defined to 39 in Linux, but is defined to
41 in Windows. So deleting a directory from a Linux guest on top
of QEMU from a Windows host complains:

  # rmdir tmp
  rmdir: 'tmp': Unknown error 41

This commit provides error number translation from Windows to Linux.
It can make Linux guest OS happy with the error number when running
on top of QEMU from a Windows host.

Signed-off-by: Guohuai Shi <guohuai.shi@windriver.com>
Signed-off-by: Bin Meng <bin.meng@windriver.com>
---

 hw/9pfs/9p-util.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/hw/9pfs/9p-util.h b/hw/9pfs/9p-util.h
index 778352b8ec..824ac81ad3 100644
--- a/hw/9pfs/9p-util.h
+++ b/hw/9pfs/9p-util.h
@@ -72,9 +72,9 @@ static inline int errno_to_dotl(int err)
 {
 #if defined(CONFIG_LINUX)
     /* nothing to translate (Linux -> Linux) */
-#elif defined(CONFIG_DARWIN)
+#elif defined(CONFIG_DARWIN) || defined(CONFIG_WIN32)
     /*
-     * translation mandatory for macOS hosts
+     * translation mandatory for different hosts
      *
      * FIXME: Only most important errnos translated here yet, this should be
      * extended to as many errnos being translated as possible in future.
@@ -83,9 +83,17 @@ static inline int errno_to_dotl(int err)
     case ENAMETOOLONG:  return L_ENAMETOOLONG;
     case ENOTEMPTY:     return L_ENOTEMPTY;
     case ELOOP:         return L_ELOOP;
+#ifdef CONFIG_DARWIN
     case ENOATTR:       return L_ENODATA;
     case ENOTSUP        return L_EOPNOTSUPP;
     case EOPNOTSUPP:    return L_EOPNOTSUPP;
+#endif
+#ifdef CONFIG_WIN32
+    case EDEADLK:       return L_EDEADLK;
+    case ENOLCK:        return L_ENOLCK;
+    case ENOSYS:        return L_ENOSYS;
+    case EILSEQ:        return L_EILSEQ;
+#endif
     }
 #else
 #error Missing errno translation to Linux for this host system
-- 
2.25.1