[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[RFC PATCH 07/18] blockdev-nbd: Boxed argument type for nbd-server-add
From: |
Kevin Wolf |
Subject: |
[RFC PATCH 07/18] blockdev-nbd: Boxed argument type for nbd-server-add |
Date: |
Thu, 17 Oct 2019 15:01:53 +0200 |
Move the arguments of nbd-server-add to a new struct BlockExportNbd and
convert the command to 'boxed': true. This makes it easier to share code
with the storage daemon.
Signed-off-by: Kevin Wolf <address@hidden>
---
qapi/block.json | 20 +++++++++++++++-----
blockdev-nbd.c | 25 ++++++++++++-------------
monitor/hmp-cmds.c | 21 +++++++++++++++++----
3 files changed, 44 insertions(+), 22 deletions(-)
diff --git a/qapi/block.json b/qapi/block.json
index 7fe0cf6538..567f116875 100644
--- a/qapi/block.json
+++ b/qapi/block.json
@@ -259,9 +259,9 @@
'*tls-authz': 'str'} }
##
-# @nbd-server-add:
+# @BlockExportNbd:
#
-# Export a block node to QEMU's embedded NBD server.
+# An NBD block export.
#
# @device: The device name or node name of the node to be exported
#
@@ -270,19 +270,29 @@
#
# @writable: Whether clients should be able to write to the device via the
# NBD connection (default false).
-
+#
# @bitmap: Also export the dirty bitmap reachable from @device, so the
# NBD client can use NBD_OPT_SET_META_CONTEXT with
# "qemu:dirty-bitmap:NAME" to inspect the bitmap. (since 4.0)
#
+# Since: 4.2
+##
+{ 'struct': 'BlockExportNbd',
+ 'data': {'device': 'str', '*name': 'str', '*writable': 'bool',
+ '*bitmap': 'str' } }
+
+##
+# @nbd-server-add:
+#
+# Export a block node to QEMU's embedded NBD server.
+#
# 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', '*name': 'str', '*writable': 'bool',
- '*bitmap': 'str' } }
+ 'data': 'BlockExportNbd', 'boxed': true }
##
# @NbdServerRemoveMode:
diff --git a/blockdev-nbd.c b/blockdev-nbd.c
index d4c1fd4166..ee8262cd4c 100644
--- a/blockdev-nbd.c
+++ b/blockdev-nbd.c
@@ -148,9 +148,7 @@ void qmp_nbd_server_start(SocketAddressLegacy *addr,
qapi_free_SocketAddress(addr_flat);
}
-void qmp_nbd_server_add(const char *device, bool has_name, const char *name,
- bool has_writable, bool writable,
- bool has_bitmap, const char *bitmap, Error **errp)
+void qmp_nbd_server_add(BlockExportNbd *arg, Error **errp)
{
BlockDriverState *bs = NULL;
BlockBackend *on_eject_blk;
@@ -163,18 +161,18 @@ void qmp_nbd_server_add(const char *device, bool
has_name, const char *name,
return;
}
- if (!has_name) {
- name = device;
+ if (!arg->has_name) {
+ arg->name = arg->device;
}
- if (nbd_export_find(name)) {
- error_setg(errp, "NBD server already has export named '%s'", name);
+ if (nbd_export_find(arg->name)) {
+ error_setg(errp, "NBD server already has export named '%s'",
arg->name);
return;
}
- on_eject_blk = blk_by_name(device);
+ on_eject_blk = blk_by_name(arg->device);
- bs = bdrv_lookup_bs(device, device, errp);
+ bs = bdrv_lookup_bs(arg->device, arg->device, errp);
if (!bs) {
return;
}
@@ -188,14 +186,15 @@ void qmp_nbd_server_add(const char *device, bool
has_name, const char *name,
goto out;
}
- if (!has_writable) {
- writable = false;
+ if (!arg->has_writable) {
+ arg->writable = false;
}
if (bdrv_is_read_only(bs)) {
- writable = false;
+ arg->writable = false;
}
- exp = nbd_export_new(bs, 0, len, name, NULL, bitmap, !writable, !writable,
+ exp = nbd_export_new(bs, 0, len, arg->name, NULL, arg->bitmap,
+ !arg->writable, !arg->writable,
NULL, false, on_eject_blk, errp);
if (!exp) {
goto out;
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index b2551c16d1..22d7e6e222 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -2320,6 +2320,7 @@ void hmp_nbd_server_start(Monitor *mon, const QDict
*qdict)
Error *local_err = NULL;
BlockInfoList *block_list, *info;
SocketAddress *addr;
+ BlockExportNbd export;
if (writable && !all) {
error_setg(&local_err, "-w only valid together with -a");
@@ -2352,8 +2353,13 @@ void hmp_nbd_server_start(Monitor *mon, const QDict
*qdict)
continue;
}
- qmp_nbd_server_add(info->value->device, false, NULL,
- true, writable, false, NULL, &local_err);
+ export = (BlockExportNbd) {
+ .device = info->value->device,
+ .has_writable = true,
+ .writable = writable,
+ };
+
+ qmp_nbd_server_add(&export, &local_err);
if (local_err != NULL) {
qmp_nbd_server_stop(NULL);
@@ -2374,8 +2380,15 @@ 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, !!name, name, true, writable,
- false, NULL, &local_err);
+ BlockExportNbd export = {
+ .device = (char *) device,
+ .has_name = !!name,
+ .name = (char *) name,
+ .has_writable = true,
+ .writable = writable,
+ };
+
+ qmp_nbd_server_add(&export, &local_err);
hmp_handle_error(mon, &local_err);
}
--
2.20.1
- [RFC PATCH 00/18] Add qemu-storage-daemon, Kevin Wolf, 2019/10/17
- [RFC PATCH 01/18] qemu-storage-daemon: Add barebone tool, Kevin Wolf, 2019/10/17
- [RFC PATCH 02/18] qemu-storage-daemon: Add --object option, Kevin Wolf, 2019/10/17
- [RFC PATCH 03/18] stubs: Add arch_type, Kevin Wolf, 2019/10/17
- [RFC PATCH 05/18] qemu-storage-daemon: Add --blockdev option, Kevin Wolf, 2019/10/17
- [RFC PATCH 04/18] stubs: Add blk_by_qdev_id(), Kevin Wolf, 2019/10/17
- [RFC PATCH 06/18] qemu-storage-daemon: Add --nbd-server option, Kevin Wolf, 2019/10/17
- [RFC PATCH 07/18] blockdev-nbd: Boxed argument type for nbd-server-add,
Kevin Wolf <=
- [RFC PATCH 10/18] qemu-storage-daemon: Add --chardev option, Kevin Wolf, 2019/10/17
- [RFC PATCH 08/18] qemu-storage-daemon: Add --export option, Kevin Wolf, 2019/10/17
- [RFC PATCH 11/18] monitor: Move monitor option parsing to monitor/monitor.c, Kevin Wolf, 2019/10/17
- [RFC PATCH 09/18] qemu-storage-daemon: Add main loop, Kevin Wolf, 2019/10/17
- [RFC PATCH 12/18] stubs: Update monitor stubs for qemu-storage-daemon, Kevin Wolf, 2019/10/17
- [RFC PATCH 15/18] qapi: Support empty modules, Kevin Wolf, 2019/10/17
- [RFC PATCH 14/18] monitor: Create monitor/qmp-cmds-monitor.c, Kevin Wolf, 2019/10/17
- [RFC PATCH 13/18] qapi: Create module 'monitor', Kevin Wolf, 2019/10/17
- [RFC PATCH 16/18] qapi: Create 'pragma' module, Kevin Wolf, 2019/10/17
- [RFC PATCH 17/18] monitor: Move qmp_query_qmp_schema to qmp-cmds-monitor.c, Kevin Wolf, 2019/10/17