Signed-off-by: Wen Congyang <we...@cn.fujitsu.com>
Signed-off-by: zhanghailiang <zhang.zhanghaili...@huawei.com>
Signed-off-by: Gonglei <arei.gong...@huawei.com>
---
blockdev.c | 8 ++++++++
include/block/block.h | 1 +
qemu-options.hx | 4 ++++
3 files changed, 13 insertions(+)
diff --git a/blockdev.c b/blockdev.c
index 1cd1b79..07b0477 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -431,6 +431,10 @@ static BlockBackend *blockdev_init(const char *file, QDict
*bs_opts,
qdict_put(bs_opts, "driver", qstring_from_str(buf));
}
+ if (qemu_opt_get_bool(opts, "no-connect", false)) {
+ bdrv_flags |= BDRV_O_NO_CONNECT;
+ }
+
/* disk I/O throttling */
memset(&cfg, 0, sizeof(cfg));
cfg.buckets[THROTTLE_BPS_TOTAL].avg =
@@ -3214,6 +3218,10 @@ QemuOptsList qemu_common_drive_opts = {
.name = "detect-zeroes",
.type = QEMU_OPT_STRING,
.help = "try to optimize zero writes (off, on, unmap)",
+ },{
+ .name = "no-connect",
+ .type = QEMU_OPT_BOOL,
+ .help = "enable whether to connect remote target"
},
{ /* end of list */ }
},
diff --git a/include/block/block.h b/include/block/block.h
index 2c2a0cc..4b3a2b9 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -88,6 +88,7 @@ typedef struct HDGeometry {
#define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given:
select an appropriate protocol driver,
ignoring the format layer */
+#define BDRV_O_NO_CONNECT 0x10000 /* do not connect to remote target */
#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
diff --git a/qemu-options.hx b/qemu-options.hx
index 5438f98..7bdd7b7 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -469,6 +469,7 @@ DEF("drive", HAS_ARG, QEMU_OPTION_drive,
" [[,iops_max=im]|[[,iops_rd_max=irm][,iops_wr_max=iwm]]]\n"
" [[,iops_size=is]]\n"
" [[,group=g]]\n"
+ " [,no-connect=on|off]\n"
" use 'file' as a drive image\n", QEMU_ARCH_ALL)
STEXI
@item -drive @var{option}[,@var{option}[,@var{option}[,...]]]
@@ -530,6 +531,9 @@ file sectors into the image file.
conversion of plain zero writes by the OS to driver specific optimized
zero write commands. You may even choose "unmap" if @var{discard} is set
to "unmap" to allow a zero write to be converted to an UNMAP operation.
+@item no-connect=@var{no-connect}
+@var{no-connect} is "on" or "off", and enables whether to connect to remote
+target when open the drive. The default value is "off".
@end table
By default, the @option{cache=writeback} mode is used. It will report data
--
2.4.3
