vhost: split structs into a separate header file

vhost structs are shared by vhost-kernel and vhost-user.  Split them
into a separate file to ease copying them into programs that implement
either the server or the client side of vhost-user.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index 84c3de8..40d028e 100644 (file)
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -11,94 +11,9 @@
  * device configuration.
  */
 
+#include <linux/vhost_types.h>
 #include <linux/types.h>
-#include <linux/compiler.h>
 #include <linux/ioctl.h>
-#include <linux/virtio_config.h>
-#include <linux/virtio_ring.h>
-
-struct vhost_vring_state {
-       unsigned int index;
-       unsigned int num;
-};
-
-struct vhost_vring_file {
-       unsigned int index;
-       int fd; /* Pass -1 to unbind from file. */
-
-};
-
-struct vhost_vring_addr {
-       unsigned int index;
-       /* Option flags. */
-       unsigned int flags;
-       /* Flag values: */
-       /* Whether log address is valid. If set enables logging. */
-#define VHOST_VRING_F_LOG 0
-
-       /* Start of array of descriptors (virtually contiguous) */
-       __u64 desc_user_addr;
-       /* Used structure address. Must be 32 bit aligned */
-       __u64 used_user_addr;
-       /* Available structure address. Must be 16 bit aligned */
-       __u64 avail_user_addr;
-       /* Logging support. */
-       /* Log writes to used structure, at offset calculated from specified
-        * address. Address must be 32 bit aligned. */
-       __u64 log_guest_addr;
-};
-
-/* no alignment requirement */
-struct vhost_iotlb_msg {
-       __u64 iova;
-       __u64 size;
-       __u64 uaddr;
-#define VHOST_ACCESS_RO      0x1
-#define VHOST_ACCESS_WO      0x2
-#define VHOST_ACCESS_RW      0x3
-       __u8 perm;
-#define VHOST_IOTLB_MISS           1
-#define VHOST_IOTLB_UPDATE         2
-#define VHOST_IOTLB_INVALIDATE     3
-#define VHOST_IOTLB_ACCESS_FAIL    4
-       __u8 type;
-};
-
-#define VHOST_IOTLB_MSG 0x1
-#define VHOST_IOTLB_MSG_V2 0x2
-
-struct vhost_msg {
-       int type;
-       union {
-               struct vhost_iotlb_msg iotlb;
-               __u8 padding[64];
-       };
-};
-
-struct vhost_msg_v2 {
-       __u32 type;
-       __u32 reserved;
-       union {
-               struct vhost_iotlb_msg iotlb;
-               __u8 padding[64];
-       };
-};
-
-struct vhost_memory_region {
-       __u64 guest_phys_addr;
-       __u64 memory_size; /* bytes */
-       __u64 userspace_addr;
-       __u64 flags_padding; /* No flags are currently specified. */
-};
-
-/* All region addresses and sizes must be 4K aligned. */
-#define VHOST_PAGE_SIZE 0x1000
-
-struct vhost_memory {
-       __u32 nregions;
-       __u32 padding;
-       struct vhost_memory_region regions[0];
-};
 
 /* ioctls */
 
@@ -186,31 +101,7 @@ struct vhost_memory {
  * device.  This can be used to stop the ring (e.g. for migration). */
 #define VHOST_NET_SET_BACKEND _IOW(VHOST_VIRTIO, 0x30, struct vhost_vring_file)
 
-/* Feature bits */
-/* Log all write descriptors. Can be changed while device is active. */
-#define VHOST_F_LOG_ALL 26
-/* vhost-net should add virtio_net_hdr for RX, and strip for TX packets. */
-#define VHOST_NET_F_VIRTIO_NET_HDR 27
-
-/* VHOST_SCSI specific definitions */
-
-/*
- * Used by QEMU userspace to ensure a consistent vhost-scsi ABI.
- *
- * ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate +
- *            RFC-v2 vhost-scsi userspace.  Add GET_ABI_VERSION ioctl usage
- * ABI Rev 1: January 2013. Ignore vhost_tpgt filed in struct vhost_scsi_target.
- *            All the targets under vhost_wwpn can be seen and used by guset.
- */
-
-#define VHOST_SCSI_ABI_VERSION 1
-
-struct vhost_scsi_target {
-       int abi_version;
-       char vhost_wwpn[224]; /* TRANSPORT_IQN_LEN */
-       unsigned short vhost_tpgt;
-       unsigned short reserved;
-};
+/* VHOST_SCSI specific defines */
 
 #define VHOST_SCSI_SET_ENDPOINT _IOW(VHOST_VIRTIO, 0x40, struct vhost_scsi_target)
 #define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target)

diff --git a/include/uapi/linux/vhost_types.h b/include/uapi/linux/vhost_types.h
new file mode 100644 (file)
index 0000000..c907290
--- /dev/null
+++ b/include/uapi/linux/vhost_types.h
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _LINUX_VHOST_TYPES_H
+#define _LINUX_VHOST_TYPES_H
+/* Userspace interface for in-kernel virtio accelerators. */
+
+/* vhost is used to reduce the number of system calls involved in virtio.
+ *
+ * Existing virtio net code is used in the guest without modification.
+ *
+ * This header includes interface used by userspace hypervisor for
+ * device configuration.
+ */
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+#include <linux/virtio_config.h>
+#include <linux/virtio_ring.h>
+
+struct vhost_vring_state {
+       unsigned int index;
+       unsigned int num;
+};
+
+struct vhost_vring_file {
+       unsigned int index;
+       int fd; /* Pass -1 to unbind from file. */
+
+};
+
+struct vhost_vring_addr {
+       unsigned int index;
+       /* Option flags. */
+       unsigned int flags;
+       /* Flag values: */
+       /* Whether log address is valid. If set enables logging. */
+#define VHOST_VRING_F_LOG 0
+
+       /* Start of array of descriptors (virtually contiguous) */
+       __u64 desc_user_addr;
+       /* Used structure address. Must be 32 bit aligned */
+       __u64 used_user_addr;
+       /* Available structure address. Must be 16 bit aligned */
+       __u64 avail_user_addr;
+       /* Logging support. */
+       /* Log writes to used structure, at offset calculated from specified
+        * address. Address must be 32 bit aligned. */
+       __u64 log_guest_addr;
+};
+
+/* no alignment requirement */
+struct vhost_iotlb_msg {
+       __u64 iova;
+       __u64 size;
+       __u64 uaddr;
+#define VHOST_ACCESS_RO      0x1
+#define VHOST_ACCESS_WO      0x2
+#define VHOST_ACCESS_RW      0x3
+       __u8 perm;
+#define VHOST_IOTLB_MISS           1
+#define VHOST_IOTLB_UPDATE         2
+#define VHOST_IOTLB_INVALIDATE     3
+#define VHOST_IOTLB_ACCESS_FAIL    4
+       __u8 type;
+};
+
+#define VHOST_IOTLB_MSG 0x1
+#define VHOST_IOTLB_MSG_V2 0x2
+
+struct vhost_msg {
+       int type;
+       union {
+               struct vhost_iotlb_msg iotlb;
+               __u8 padding[64];
+       };
+};
+
+struct vhost_msg_v2 {
+       __u32 type;
+       __u32 reserved;
+       union {
+               struct vhost_iotlb_msg iotlb;
+               __u8 padding[64];
+       };
+};
+
+struct vhost_memory_region {
+       __u64 guest_phys_addr;
+       __u64 memory_size; /* bytes */
+       __u64 userspace_addr;
+       __u64 flags_padding; /* No flags are currently specified. */
+};
+
+/* All region addresses and sizes must be 4K aligned. */
+#define VHOST_PAGE_SIZE 0x1000
+
+struct vhost_memory {
+       __u32 nregions;
+       __u32 padding;
+       struct vhost_memory_region regions[0];
+};
+
+/* VHOST_SCSI specific definitions */
+
+/*
+ * Used by QEMU userspace to ensure a consistent vhost-scsi ABI.
+ *
+ * ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate +
+ *            RFC-v2 vhost-scsi userspace.  Add GET_ABI_VERSION ioctl usage
+ * ABI Rev 1: January 2013. Ignore vhost_tpgt field in struct vhost_scsi_target.
+ *            All the targets under vhost_wwpn can be seen and used by guset.
+ */
+
+#define VHOST_SCSI_ABI_VERSION 1
+
+struct vhost_scsi_target {
+       int abi_version;
+       char vhost_wwpn[224]; /* TRANSPORT_IQN_LEN */
+       unsigned short vhost_tpgt;
+       unsigned short reserved;
+};
+
+/* Feature bits */
+/* Log all write descriptors. Can be changed while device is active. */
+#define VHOST_F_LOG_ALL 26
+/* vhost-net should add virtio_net_hdr for RX, and strip for TX packets. */
+#define VHOST_NET_F_VIRTIO_NET_HDR 27
+
+#endif