The vhost-user protocol is not really Linux-specific so let's enable
libvhost-user for any POSIX system.
Compiling it on macOS and FreeBSD some problems came up:
- avoid to include linux/vhost.h which is available only on Linux
(vhost_types.h contains many of the things we need)
- macOS doesn't provide sys/endian.h, so let's define them
(note: libvhost-user doesn't include QEMU's headers, so we can't use
use "qemu/bswap.h")
- define eventfd_[write|read] as write/read wrapper when system doesn't
provide those (e.g. macOS)
- copy SEAL defines from include/qemu/memfd.h to make the code works
on FreeBSD where MFD_ALLOW_SEALING is defined
- define MAP_NORESERVE if it's not defined (e.g. on FreeBSD)
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Tested-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Acked-by: Stefan Hajnoczi <stefa...@redhat.com>
Signed-off-by: Stefano Garzarella <sgarz...@redhat.com>
---
v5:
- fixed typos in the commit description [Phil]
---
meson.build | 2 +-
subprojects/libvhost-user/libvhost-user.h | 2 +-
subprojects/libvhost-user/libvhost-user.c | 60 +++++++++++++++++++++--
3 files changed, 59 insertions(+), 5 deletions(-)
diff --git a/meson.build b/meson.build
index a72500be77..48e476b237 100644
--- a/meson.build
+++ b/meson.build
@@ -3162,7 +3162,7 @@ if have_system and vfio_user_server_allowed
endif
vhost_user = not_found
-if host_os == 'linux' and have_vhost_user
+if have_vhost_user
libvhost_user = subproject('libvhost-user')
vhost_user = libvhost_user.get_variable('vhost_user_dep')
endif
diff --git a/subprojects/libvhost-user/libvhost-user.h
b/subprojects/libvhost-user/libvhost-user.h
index deb40e77b3..e13e1d3931 100644
--- a/subprojects/libvhost-user/libvhost-user.h
+++ b/subprojects/libvhost-user/libvhost-user.h
@@ -18,9 +18,9 @@
#include <stdbool.h>
#include <stddef.h>
#include <poll.h>
-#include <linux/vhost.h>
#include <pthread.h>
#include "standard-headers/linux/virtio_ring.h"
+#include "standard-headers/linux/vhost_types.h"
/* Based on qemu/hw/virtio/vhost-user.c */
#define VHOST_USER_F_PROTOCOL_FEATURES 30
diff --git a/subprojects/libvhost-user/libvhost-user.c
b/subprojects/libvhost-user/libvhost-user.c
index 2c20cdc16e..57e58d4adb 100644
--- a/subprojects/libvhost-user/libvhost-user.c
+++ b/subprojects/libvhost-user/libvhost-user.c
@@ -28,9 +28,7 @@
#include <inttypes.h>
#include <sys/types.h>
#include <sys/socket.h>
-#include <sys/eventfd.h>
#include <sys/mman.h>
-#include <endian.h>
/* Necessary to provide VIRTIO_F_VERSION_1 on system
* with older linux headers. Must appear before
@@ -39,8 +37,8 @@
#include "standard-headers/linux/virtio_config.h"
#if defined(__linux__)
+#include <endian.h>
#include <sys/syscall.h>
-#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/vhost.h>
#include <sys/vfs.h>
@@ -52,6 +50,62 @@
#endif
+#if defined(__APPLE__) && (__MACH__)
+#include <libkern/OSByteOrder.h>
+#define htobe16(x) OSSwapHostToBigInt16(x)
+#define htole16(x) OSSwapHostToLittleInt16(x)
+#define be16toh(x) OSSwapBigToHostInt16(x)
+#define le16toh(x) OSSwapLittleToHostInt16(x)
+
+#define htobe32(x) OSSwapHostToBigInt32(x)
+#define htole32(x) OSSwapHostToLittleInt32(x)
+#define be32toh(x) OSSwapBigToHostInt32(x)
+#define le32toh(x) OSSwapLittleToHostInt32(x)
+
+#define htobe64(x) OSSwapHostToBigInt64(x)
+#define htole64(x) OSSwapHostToLittleInt64(x)
+#define be64toh(x) OSSwapBigToHostInt64(x)
+#define le64toh(x) OSSwapLittleToHostInt64(x)
+#endif
+
+#ifdef CONFIG_EVENTFD
+#include <sys/eventfd.h>
+#else
+#define eventfd_t uint64_t
+
+int eventfd_write(int fd, eventfd_t value)
+{
+ return (write(fd, &value, sizeof(value)) == sizeof(value)) ? 0 : -1;
+}
+
+int eventfd_read(int fd, eventfd_t *value)
+{
+ return (read(fd, value, sizeof(*value)) == sizeof(*value)) ? 0 : -1;
+}
+#endif
+
+#ifdef MFD_ALLOW_SEALING
+#include <fcntl.h>
+
+#ifndef F_LINUX_SPECIFIC_BASE
+#define F_LINUX_SPECIFIC_BASE 1024
+#endif
+
+#ifndef F_ADD_SEALS
+#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
+#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
+
+#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
+#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
+#define F_SEAL_GROW 0x0004 /* prevent file from growing */
+#define F_SEAL_WRITE 0x0008 /* prevent writes */
+#endif
+#endif
+
+#ifndef MAP_NORESERVE
+#define MAP_NORESERVE 0
+#endif
+
#include "include/atomic.h"
#include "libvhost-user.h"
--
2.45.1
