Add qemu 2.4.0

[kvmfornfv.git] / qemu / include / block / accounting.h

diff --git a/qemu/include/block/accounting.h b/qemu/include/block/accounting.h
new file mode 100644 (file)
index 0000000..4c406cf
--- /dev/null
+++ b/qemu/include/block/accounting.h
@@ -0,0 +1,60 @@
+/*
+ * QEMU System Emulator block accounting
+ *
+ * Copyright (c) 2011 Christoph Hellwig
+ *
+ * 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 BLOCK_ACCOUNTING_H
+#define BLOCK_ACCOUNTING_H
+
+#include <stdint.h>
+
+#include "qemu/typedefs.h"
+
+enum BlockAcctType {
+    BLOCK_ACCT_READ,
+    BLOCK_ACCT_WRITE,
+    BLOCK_ACCT_FLUSH,
+    BLOCK_MAX_IOTYPE,
+};
+
+typedef struct BlockAcctStats {
+    uint64_t nr_bytes[BLOCK_MAX_IOTYPE];
+    uint64_t nr_ops[BLOCK_MAX_IOTYPE];
+    uint64_t total_time_ns[BLOCK_MAX_IOTYPE];
+    uint64_t merged[BLOCK_MAX_IOTYPE];
+    uint64_t wr_highest_sector;
+} BlockAcctStats;
+
+typedef struct BlockAcctCookie {
+    int64_t bytes;
+    int64_t start_time_ns;
+    enum BlockAcctType type;
+} BlockAcctCookie;
+
+void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie,
+                      int64_t bytes, enum BlockAcctType type);
+void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie);
+void block_acct_highest_sector(BlockAcctStats *stats, int64_t sector_num,
+                               unsigned int nb_sectors);
+void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
+                           int num_requests);
+
+#endif