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authorMax Reitz <mreitz@redhat.com>2015-11-11 04:49:44 +0100
committerKevin Wolf <kwolf@redhat.com>2015-11-11 16:23:34 +0100
commit39ff43d9e1f42b1d829a955e546cddab87ac0626 (patch)
tree40a4f937d8fe47ab085bf7950253c348a941e3d2 /qmp-commands.hx
parent1068674927a08cb9f535946abe2f91529b13160c (diff)
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blockdev: read-only-mode for blockdev-change-medium
Add an option to qmp_blockdev_change_medium() which allows changing the read-only status of the block device whose medium is changed. Some drives do not have a inherently fixed read-only status; for instance, floppy disks can be set read-only or writable independently of the drive. Some users may find it useful to be able to therefore change the read-only status of a block device when changing the medium. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qmp-commands.hx')
-rw-r--r--qmp-commands.hx24
1 files changed, 23 insertions, 1 deletions
diff --git a/qmp-commands.hx b/qmp-commands.hx
index f6d9c25..39d6e25 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -4183,7 +4183,7 @@ EQMP
{
.name = "blockdev-change-medium",
- .args_type = "device:B,filename:F,format:s?",
+ .args_type = "device:B,filename:F,format:s?,read-only-mode:s?",
.mhandler.cmd_new = qmp_marshal_blockdev_change_medium,
},
@@ -4199,6 +4199,8 @@ Arguments:
- "device": device name (json-string)
- "filename": filename of the new image (json-string)
- "format": format of the new image (json-string, optional)
+- "read-only-mode": new read-only mode (json-string, optional)
+ - Possible values: "retain" (default), "read-only", "read-write"
Examples:
@@ -4210,6 +4212,26 @@ Examples:
"format": "raw" } }
<- { "return": {} }
+2. Load a read-only medium into a writable drive
+
+-> { "execute": "blockdev-change-medium",
+ "arguments": { "device": "isa-fd0",
+ "filename": "/srv/images/ro.img",
+ "format": "raw",
+ "read-only-mode": "retain" } }
+
+<- { "error":
+ { "class": "GenericError",
+ "desc": "Could not open '/srv/images/ro.img': Permission denied" } }
+
+-> { "execute": "blockdev-change-medium",
+ "arguments": { "device": "isa-fd0",
+ "filename": "/srv/images/ro.img",
+ "format": "raw",
+ "read-only-mode": "read-only" } }
+
+<- { "return": {} }
+
EQMP
{