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authorVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>2018-01-19 16:57:15 +0300
committerEric Blake <eblake@redhat.com>2018-01-26 09:37:20 -0600
commit902a1f94bee2f5c633bb623baf2160c0a6da097c (patch)
tree172642330cb8ede5ad843ee82de7cc2179e5f754
parente607bbee553cfe73072870cef458cfa4e78133e2 (diff)
downloadqemu-arm-902a1f94bee2f5c633bb623baf2160c0a6da097c.tar.gz
qapi: add name parameter to nbd-server-add
Allow user to specify name for new export, to not reuse internal node name and to not show it to clients. This also allows creating several exports per device. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180119135719.24745-2-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
-rw-r--r--blockdev-nbd.c14
-rw-r--r--hmp.c5
-rw-r--r--qapi/block.json9
3 files changed, 19 insertions, 9 deletions
diff --git a/blockdev-nbd.c b/blockdev-nbd.c
index 9e3c22109c..104789e521 100644
--- a/blockdev-nbd.c
+++ b/blockdev-nbd.c
@@ -140,8 +140,8 @@ void qmp_nbd_server_start(SocketAddressLegacy *addr,
qapi_free_SocketAddress(addr_flat);
}
-void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
- Error **errp)
+void qmp_nbd_server_add(const char *device, bool has_name, const char *name,
+ bool has_writable, bool writable, Error **errp)
{
BlockDriverState *bs = NULL;
BlockBackend *on_eject_blk;
@@ -152,8 +152,12 @@ void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
return;
}
- if (nbd_export_find(device)) {
- error_setg(errp, "NBD server already exporting device '%s'", device);
+ if (!has_name) {
+ name = device;
+ }
+
+ if (nbd_export_find(name)) {
+ error_setg(errp, "NBD server already has export named '%s'", name);
return;
}
@@ -177,7 +181,7 @@ void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
return;
}
- nbd_export_set_name(exp, device);
+ nbd_export_set_name(exp, name);
/* The list of named exports has a strong reference to this export now and
* our only way of accessing it is through nbd_export_find(), so we can drop
diff --git a/hmp.c b/hmp.c
index 056bf70cf1..5bcfc36de1 100644
--- a/hmp.c
+++ b/hmp.c
@@ -2203,7 +2203,8 @@ void hmp_nbd_server_start(Monitor *mon, const QDict *qdict)
continue;
}
- qmp_nbd_server_add(info->value->device, true, writable, &local_err);
+ qmp_nbd_server_add(info->value->device, false, NULL,
+ true, writable, &local_err);
if (local_err != NULL) {
qmp_nbd_server_stop(NULL);
@@ -2223,7 +2224,7 @@ void hmp_nbd_server_add(Monitor *mon, const QDict *qdict)
bool writable = qdict_get_try_bool(qdict, "writable", false);
Error *local_err = NULL;
- qmp_nbd_server_add(device, true, writable, &local_err);
+ qmp_nbd_server_add(device, false, NULL, true, writable, &local_err);
if (local_err != NULL) {
hmp_handle_error(mon, &local_err);
diff --git a/qapi/block.json b/qapi/block.json
index f093fa3f27..353e3a45bd 100644
--- a/qapi/block.json
+++ b/qapi/block.json
@@ -213,14 +213,19 @@
#
# @device: The device name or node name of the node to be exported
#
+# @name: Export name. If unspecified, the @device parameter is used as the
+# export name. (Since 2.12)
+#
# @writable: Whether clients should be able to write to the device via the
# NBD connection (default false).
#
-# Returns: error if the device is already marked for export.
+# Returns: error if the server is not running, or export with the same name
+# already exists.
#
# Since: 1.3.0
##
-{ 'command': 'nbd-server-add', 'data': {'device': 'str', '*writable': 'bool'} }
+{ 'command': 'nbd-server-add',
+ 'data': {'device': 'str', '*name': 'str', '*writable': 'bool'} }
##
# @nbd-server-stop: