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, 91 insertions, 0 deletions

diff --git a/migration/ram.h b/migration/ram.h
new file mode 100644
index 000000000..c515396a9
--- /dev/null
+++ b/migration/ram.h
@@ -0,0 +1,91 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2011-2015 Red Hat Inc
+ *
+ * Authors:
+ *  Juan Quintela <quintela@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_MIGRATION_RAM_H
+#define QEMU_MIGRATION_RAM_H
+
+#include "qapi/qapi-types-migration.h"
+#include "exec/cpu-common.h"
+#include "io/channel.h"
+
+extern MigrationStats ram_counters;
+extern XBZRLECacheStats xbzrle_counters;
+extern CompressionStats compression_counters;
+
+bool ramblock_is_ignored(RAMBlock *block);
+/* Should be holding either ram_list.mutex, or the RCU lock. */
+#define RAMBLOCK_FOREACH_NOT_IGNORED(block)            \
+    INTERNAL_RAMBLOCK_FOREACH(block)                   \
+        if (ramblock_is_ignored(block)) {} else
+
+#define RAMBLOCK_FOREACH_MIGRATABLE(block)             \
+    INTERNAL_RAMBLOCK_FOREACH(block)                   \
+        if (!qemu_ram_is_migratable(block)) {} else
+
+int xbzrle_cache_resize(uint64_t new_size, Error **errp);
+uint64_t ram_bytes_remaining(void);
+uint64_t ram_bytes_total(void);
+void mig_throttle_counter_reset(void);
+
+uint64_t ram_pagesize_summary(void);
+int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
+void acct_update_position(QEMUFile *f, size_t size, bool zero);
+void ram_debug_dump_bitmap(unsigned long *todump, bool expected,
+                           unsigned long pages);
+void ram_postcopy_migrated_memory_release(MigrationState *ms);
+/* For outgoing discard bitmap */
+int ram_postcopy_send_discard_bitmap(MigrationState *ms);
+/* For incoming postcopy discard */
+int ram_discard_range(const char *block_name, uint64_t start, size_t length);
+int ram_postcopy_incoming_init(MigrationIncomingState *mis);
+
+void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
+
+int ramblock_recv_bitmap_test(RAMBlock *rb, void *host_addr);
+bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset);
+void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr);
+void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr);
+int64_t ramblock_recv_bitmap_send(QEMUFile *file,
+                                  const char *block_name);
+int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb);
+bool ramblock_page_is_discarded(RAMBlock *rb, ram_addr_t start);
+
+/* ram cache */
+int colo_init_ram_cache(void);
+void colo_flush_ram_cache(void);
+void colo_release_ram_cache(void);
+void colo_incoming_start_dirty_log(void);
+
+/* Background snapshot */
+bool ram_write_tracking_available(void);
+bool ram_write_tracking_compatible(void);
+void ram_write_tracking_prepare(void);
+int ram_write_tracking_start(void);
+void ram_write_tracking_stop(void);
+
+#endif