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[Qemu-devel] [PATCH 3/4] block/null-{co, aio}: Implement get_block_statu
From: |
Max Reitz |
Subject: |
[Qemu-devel] [PATCH 3/4] block/null-{co, aio}: Implement get_block_status() |
Date: |
Sat, 20 Feb 2016 18:39:52 +0100 |
Signed-off-by: Max Reitz <address@hidden>
---
block/null.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/block/null.c b/block/null.c
index ad883d9..0a8ff7b 100644
--- a/block/null.c
+++ b/block/null.c
@@ -186,6 +186,19 @@ static int null_reopen_prepare(BDRVReopenState
*reopen_state,
return 0;
}
+static int64_t coroutine_fn null_co_get_block_status(BlockDriverState *bs,
+ int64_t sector_num,
+ int nb_sectors, int *pnum,
+ BlockDriverState **file)
+{
+ off_t start = sector_num * BDRV_SECTOR_SIZE;
+
+ *pnum = nb_sectors;
+ *file = bs;
+
+ return BDRV_BLOCK_ZERO | BDRV_BLOCK_OFFSET_VALID | start;
+}
+
static BlockDriver bdrv_null_co = {
.format_name = "null-co",
.protocol_name = "null-co",
@@ -199,6 +212,8 @@ static BlockDriver bdrv_null_co = {
.bdrv_co_writev = null_co_writev,
.bdrv_co_flush_to_disk = null_co_flush,
.bdrv_reopen_prepare = null_reopen_prepare,
+
+ .bdrv_co_get_block_status = null_co_get_block_status,
};
static BlockDriver bdrv_null_aio = {
@@ -214,6 +229,8 @@ static BlockDriver bdrv_null_aio = {
.bdrv_aio_writev = null_aio_writev,
.bdrv_aio_flush = null_aio_flush,
.bdrv_reopen_prepare = null_reopen_prepare,
+
+ .bdrv_co_get_block_status = null_co_get_block_status,
};
static void bdrv_null_init(void)
--
2.7.1