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, 70 insertions, 0 deletions

diff --git a/hw/9pfs/9p-synth.h b/hw/9pfs/9p-synth.h
new file mode 100644
index 000000000..036d7e4a5
--- /dev/null
+++ b/hw/9pfs/9p-synth.h
@@ -0,0 +1,70 @@
+/*
+ * 9p
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_9P_SYNTH_H
+#define QEMU_9P_SYNTH_H
+
+typedef struct V9fsSynthNode V9fsSynthNode;
+typedef ssize_t (*v9fs_synth_read)(void *buf, int len, off_t offset,
+                                   void *arg);
+typedef ssize_t (*v9fs_synth_write)(void *buf, int len, off_t offset,
+                                    void *arg);
+typedef struct V9fsSynthNodeAttr {
+    int mode;
+    int inode;
+    int nlink;
+    v9fs_synth_read read;
+    v9fs_synth_write write;
+} V9fsSynthNodeAttr;
+
+struct V9fsSynthNode {
+    QLIST_HEAD(, V9fsSynthNode) child;
+    QLIST_ENTRY(V9fsSynthNode) sibling;
+    char name[NAME_MAX];
+    V9fsSynthNodeAttr *attr;
+    V9fsSynthNodeAttr actual_attr;
+    void *private;
+    int open_count;
+};
+
+typedef struct V9fsSynthOpenState {
+    off_t offset;
+    V9fsSynthNode *node;
+    struct dirent dent;
+} V9fsSynthOpenState;
+
+int qemu_v9fs_synth_mkdir(V9fsSynthNode *parent, int mode,
+                          const char *name, V9fsSynthNode **result);
+int qemu_v9fs_synth_add_file(V9fsSynthNode *parent, int mode,
+                             const char *name, v9fs_synth_read read,
+                             v9fs_synth_write write, void *arg);
+
+/* qtest stuff */
+
+#define QTEST_V9FS_SYNTH_WALK_FILE "WALK%d"
+#define QTEST_V9FS_SYNTH_LOPEN_FILE "LOPEN"
+#define QTEST_V9FS_SYNTH_WRITE_FILE "WRITE"
+
+/* for READDIR test */
+#define QTEST_V9FS_SYNTH_READDIR_DIR "ReadDirDir"
+#define QTEST_V9FS_SYNTH_READDIR_FILE "ReadDirFile%d"
+#define QTEST_V9FS_SYNTH_READDIR_NFILES 100
+
+/* Any write to the "FLUSH" file is handled one byte at a time by the
+ * backend. If the byte is zero, the backend returns success (ie, 1),
+ * otherwise it forces the server to try again forever. Thus allowing
+ * the client to cancel the request.
+ */
+#define QTEST_V9FS_SYNTH_FLUSH_FILE "FLUSH"
+
+#endif