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[Qemu-devel] [PULL 42/54] quorum: Create BDRVQuorumState and BlkDriver a
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PULL 42/54] quorum: Create BDRVQuorumState and BlkDriver and do init. |
Date: |
Fri, 21 Feb 2014 23:12:39 +0100 |
From: BenoƮt Canet <address@hidden>
Create the structure holding the quorum settings and write the minimal block
driver instanciation boilerplate.
Signed-off-by: Benoit Canet <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
block/quorum.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/block/quorum.c b/block/quorum.c
index 950f5cc..375ffd5 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -15,6 +15,23 @@
#include "block/block_int.h"
+/* the following structure holds the state of one quorum instance */
+typedef struct BDRVQuorumState {
+ BlockDriverState **bs; /* children BlockDriverStates */
+ int num_children; /* children count */
+ int threshold; /* if less than threshold children reads gave the
+ * same result a quorum error occurs.
+ */
+ bool is_blkverify; /* true if the driver is in blkverify mode
+ * Writes are mirrored on two children devices.
+ * On reads the two children devices' contents are
+ * compared and if a difference is spotted its
+ * location is printed and the code aborts.
+ * It is useful to debug other block drivers by
+ * comparing them with a reference one.
+ */
+} BDRVQuorumState;
+
typedef struct QuorumAIOCB QuorumAIOCB;
/* Quorum will create one instance of the following structure per operation it
@@ -51,3 +68,17 @@ struct QuorumAIOCB {
bool is_read;
int vote_ret;
};
+
+static BlockDriver bdrv_quorum = {
+ .format_name = "quorum",
+ .protocol_name = "quorum",
+
+ .instance_size = sizeof(BDRVQuorumState),
+};
+
+static void bdrv_quorum_init(void)
+{
+ bdrv_register(&bdrv_quorum);
+}
+
+block_init(bdrv_quorum_init);
--
1.8.1.4
- [Qemu-devel] [PULL 30/54] vdi: say why an image is bad, (continued)
- [Qemu-devel] [PULL 30/54] vdi: say why an image is bad, Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 31/54] qemu-option: has_help_option() and is_valid_option_list(), Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 32/54] qemu-img create: Support multiple -o options, Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 33/54] qemu-img convert: Support multiple -o options, Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 34/54] qemu-img amend: Support multiple -o options, Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 35/54] qemu-img: Allow -o help with incomplete argument list, Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 36/54] qemu-iotests: Check qemu-img command line parsing, Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 37/54] qemu-config: Sections must consist of keys, Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 38/54] qdict: Extract non-QDicts in qdict_array_split(), Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 41/54] quorum: Create quorum.c, add QuorumChildRequest and QuorumAIOCB., Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 42/54] quorum: Create BDRVQuorumState and BlkDriver and do init.,
Kevin Wolf <=
- [Qemu-devel] [PULL 43/54] quorum: Add quorum_aio_writev and its dependencies., Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 40/54] check-qdict: Test termination of qdict_array_split(), Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 39/54] check-qdict: Adjust test for qdict_array_split(), Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 44/54] blkverify: Extract qemu_iovec_clone() and qemu_iovec_compare() from blkverify., Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 45/54] quorum: Add quorum_aio_readv., Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 46/54] quorum: Add quorum mechanism., Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 48/54] quorum: Add quorum_invalidate_cache()., Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 47/54] quorum: Add quorum_getlength()., Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 49/54] quorum: Add quorum_co_flush()., Kevin Wolf, 2014/02/21
- [Qemu-devel] [PULL 50/54] quorum: Implement recursive .bdrv_recurse_is_first_non_filter in quorum., Kevin Wolf, 2014/02/21