[Qemu-devel] [RFC V2 01/10] quorum: Create quorum.c, add QuorumSingleAIOCB and QuorumAIOCB.

["Benoît Canet" <benoit.canet@gmail.com>]

Signed-off-by: Benoit Canet <benoit@irqsave.net>
---
 block/Makefile.objs |    1 +
 block/quorum.c      |   44 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 block/quorum.c

diff --git a/block/Makefile.objs b/block/Makefile.objs
index b5754d3..66af6dc 100644
--- a/block/Makefile.objs
+++ b/block/Makefile.objs
@@ -4,6 +4,7 @@ block-obj-y += qed.o qed-gencb.o qed-l2-cache.o qed-table.o qed-cluster.o
 block-obj-y += qed-check.o
 block-obj-y += parallels.o nbd.o blkdebug.o sheepdog.o blkverify.o
 block-obj-y += stream.o
+block-obj-y += quorum.o
 block-obj-$(CONFIG_WIN32) += raw-win32.o
 block-obj-$(CONFIG_POSIX) += raw-posix.o
 block-obj-$(CONFIG_LIBISCSI) += iscsi.o
diff --git a/block/quorum.c b/block/quorum.c
new file mode 100644
index 0000000..046b183
--- /dev/null
+++ b/block/quorum.c
@@ -0,0 +1,44 @@
+/*
+ * Quorum Block filter
+ *
+ * Copyright (C) Nodalink, SARL. 2012
+ *
+ * Author:
+ *   Benoît Canet <benoit.canet@irqsave.net>
+ *
+ * Based on the design and code of blkverify.c (Copyright (C) 2010 IBM, Corp)
+ * and blkmirror.c (Copyright (C) 2011 Red Hat, Inc).
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "block_int.h"
+
+typedef struct QuorumAIOCB QuorumAIOCB;
+
+typedef struct QuorumSingleAIOCB {
+    BlockDriverAIOCB *aiocb;
+    char *buf;
+    int ret;
+    QuorumAIOCB *parent;
+} QuorumSingleAIOCB;
+
+struct QuorumAIOCB {
+    BlockDriverAIOCB common;
+    QEMUBH *bh;
+
+    /* Request metadata */
+    int64_t sector_num;
+    int nb_sectors;
+
+    QEMUIOVector *qiov;         /* calling readv IOV */
+
+    QuorumSingleAIOCB aios[3];   /* individual AIOs */
+    QEMUIOVector qiovs[3];      /* individual IOVs */
+    int count;                  /* number of completed AIOCB */
+    bool *finished;             /* completion signal for cancel */
+
+    void (*vote)(QuorumAIOCB *acb);
+    int vote_ret;
+};
-- 
1.7.9.5