[Qemu-devel] [PATCH v5 02/27] qapi: Add lock-mode in blockdev-add options

[Fam Zheng <famz@redhat.com>]

To allow overriding the default locking behavior when opening the image.

Signed-off-by: Fam Zheng <famz@redhat.com>
---
 qapi/block-core.json | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/qapi/block-core.json b/qapi/block-core.json
index 98a20d2..3c54f64 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -2032,6 +2032,21 @@
             '*read-pattern': 'QuorumReadPattern' } }
 
 ##
+# @BlockdevLockMode
+#
+# Describes the operation mode for the automatic conversion of plain
+# zero writes by the OS to driver specific optimized zero write commands.
+#
+# @off:       Disabled
+# @shared:    Use shared lock for both RO and RW images.
+# @exclusive: Use exclusive lock for RW images, and shared lock for RO images.
+#
+# Since: 2.7
+##
+{ 'enum': 'BlockdevLockMode',
+  'data': [ 'off', 'shared', 'exclusive' ] }
+
+##
 # @BlockdevOptions
 #
 # Options for creating a block device.  Many options are available for all
@@ -2065,6 +2080,8 @@
 # @detect-zeroes: #optional detect and optimize zero writes (Since 2.1)
 #                 (default: off)
 #
+# @lock-mode: #optional how to lock the image. (default: exclusive) (Since 2.7)
+#
 # Remaining options are determined by the block driver.
 #
 # Since: 1.7
@@ -2082,7 +2099,8 @@
             '*stats-account-invalid': 'bool',
             '*stats-account-failed': 'bool',
             '*stats-intervals': ['int'],
-            '*detect-zeroes': 'BlockdevDetectZeroesOptions' },
+            '*detect-zeroes': 'BlockdevDetectZeroesOptions',
+            '*lock-mode': 'BlockdevLockMode' },
   'discriminator': 'driver',
   'data': {
       'archipelago':'BlockdevOptionsArchipelago',
-- 
2.8.2