Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 205 insertions, 0 deletions

diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
new file mode 100644
index 000000000..43f569b5c
--- /dev/null
+++ b/include/sysemu/os-win32.h
@@ -0,0 +1,205 @@
+/*
+ * win32 specific declarations
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2010 Jes Sorensen <Jes.Sorensen@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef QEMU_OS_WIN32_H
+#define QEMU_OS_WIN32_H
+
+#include <winsock2.h>
+#include <windows.h>
+#include <ws2tcpip.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(_WIN64)
+/* On w64, setjmp is implemented by _setjmp which needs a second parameter.
+ * If this parameter is NULL, longjump does no stack unwinding.
+ * That is what we need for QEMU. Passing the value of register rsp (default)
+ * lets longjmp try a stack unwinding which will crash with generated code. */
+# undef setjmp
+# define setjmp(env) _setjmp(env, NULL)
+#endif
+/* QEMU uses sigsetjmp()/siglongjmp() as the portable way to specify
+ * "longjmp and don't touch the signal masks". Since we know that the
+ * savemask parameter will always be zero we can safely define these
+ * in terms of setjmp/longjmp on Win32.
+ */
+#define sigjmp_buf jmp_buf
+#define sigsetjmp(env, savemask) setjmp(env)
+#define siglongjmp(env, val) longjmp(env, val)
+
+/* Missing POSIX functions. Don't use MinGW-w64 macros. */
+#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
+#undef gmtime_r
+struct tm *gmtime_r(const time_t *timep, struct tm *result);
+#undef localtime_r
+struct tm *localtime_r(const time_t *timep, struct tm *result);
+#endif /* _POSIX_THREAD_SAFE_FUNCTIONS */
+
+static inline void os_setup_signal_handling(void) {}
+static inline void os_daemonize(void) {}
+static inline void os_setup_post(void) {}
+void os_set_line_buffering(void);
+static inline void os_set_proc_name(const char *dummy) {}
+
+int getpagesize(void);
+
+#if !defined(EPROTONOSUPPORT)
+# define EPROTONOSUPPORT EINVAL
+#endif
+
+typedef struct {
+    long tv_sec;
+    long tv_usec;
+} qemu_timeval;
+int qemu_gettimeofday(qemu_timeval *tp);
+
+static inline bool is_daemonized(void)
+{
+    return false;
+}
+
+static inline int os_mlock(void)
+{
+    return -ENOSYS;
+}
+
+#define fsync _commit
+
+#if !defined(lseek)
+# define lseek _lseeki64
+#endif
+
+int qemu_ftruncate64(int, int64_t);
+
+#if !defined(ftruncate)
+# define ftruncate qemu_ftruncate64
+#endif
+
+static inline char *realpath(const char *path, char *resolved_path)
+{
+    _fullpath(resolved_path, path, _MAX_PATH);
+    return resolved_path;
+}
+
+/* ??? Mingw appears to export _lock_file and _unlock_file as the functions
+ * with which to lock a stdio handle.  But something is wrong in the markup,
+ * either in the header or the library, such that we get undefined references
+ * to "_imp___lock_file" etc when linking.  Since we seem to have no other
+ * alternative, and the usage within the logging functions isn't critical,
+ * ignore FILE locking.
+ */
+
+static inline void qemu_flockfile(FILE *f)
+{
+}
+
+static inline void qemu_funlockfile(FILE *f)
+{
+}
+
+/* We wrap all the sockets functions so that we can
+ * set errno based on WSAGetLastError()
+ */
+
+#undef connect
+#define connect qemu_connect_wrap
+int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
+                      socklen_t addrlen);
+
+#undef listen
+#define listen qemu_listen_wrap
+int qemu_listen_wrap(int sockfd, int backlog);
+
+#undef bind
+#define bind qemu_bind_wrap
+int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
+                   socklen_t addrlen);
+
+#undef socket
+#define socket qemu_socket_wrap
+int qemu_socket_wrap(int domain, int type, int protocol);
+
+#undef accept
+#define accept qemu_accept_wrap
+int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
+                     socklen_t *addrlen);
+
+#undef shutdown
+#define shutdown qemu_shutdown_wrap
+int qemu_shutdown_wrap(int sockfd, int how);
+
+#undef ioctlsocket
+#define ioctlsocket qemu_ioctlsocket_wrap
+int qemu_ioctlsocket_wrap(int fd, int req, void *val);
+
+#undef closesocket
+#define closesocket qemu_closesocket_wrap
+int qemu_closesocket_wrap(int fd);
+
+#undef getsockopt
+#define getsockopt qemu_getsockopt_wrap
+int qemu_getsockopt_wrap(int sockfd, int level, int optname,
+                         void *optval, socklen_t *optlen);
+
+#undef setsockopt
+#define setsockopt qemu_setsockopt_wrap
+int qemu_setsockopt_wrap(int sockfd, int level, int optname,
+                         const void *optval, socklen_t optlen);
+
+#undef getpeername
+#define getpeername qemu_getpeername_wrap
+int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
+                          socklen_t *addrlen);
+
+#undef getsockname
+#define getsockname qemu_getsockname_wrap
+int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
+                          socklen_t *addrlen);
+
+#undef send
+#define send qemu_send_wrap
+ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags);
+
+#undef sendto
+#define sendto qemu_sendto_wrap
+ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
+                         const struct sockaddr *addr, socklen_t addrlen);
+
+#undef recv
+#define recv qemu_recv_wrap
+ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
+
+#undef recvfrom
+#define recvfrom qemu_recvfrom_wrap
+ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
+                           struct sockaddr *addr, socklen_t *addrlen);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif