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[PATCH v2 11/20] qemu-storage-daemon: Add --export option
From: |
Kevin Wolf |
Subject: |
[PATCH v2 11/20] qemu-storage-daemon: Add --export option |
Date: |
Mon, 24 Feb 2020 15:29:59 +0100 |
Add a --export option to qemu-storage-daemon to export a block node. For
now, only NBD exports are implemented. Apart from the 'type' option
(which is the implied key), it maps the arguments for nbd-server-add to
the command line. Example:
--export nbd,device=disk,name=test-export,writable=on
Signed-off-by: Kevin Wolf <address@hidden>
---
qapi/block-core.json | 27 +++++++++++++++++++++++++++
qemu-storage-daemon.c | 31 +++++++++++++++++++++++++++++++
2 files changed, 58 insertions(+)
diff --git a/qapi/block-core.json b/qapi/block-core.json
index cdc585385c..48631218fa 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -5201,6 +5201,33 @@
##
{ 'command': 'nbd-server-stop' }
+##
+# @BlockExportType:
+#
+# An enumeration of block export types
+#
+# @nbd: NBD export
+#
+# Since: 4.2
+##
+{ 'enum': 'BlockExportType',
+ 'data': [ 'nbd' ] }
+
+##
+# @BlockExport:
+#
+# Describes a block export, i.e. how single node should be exported on an
+# external interface.
+#
+# Since: 4.2
+##
+{ 'union': 'BlockExport',
+ 'base': { 'type': 'BlockExportType' },
+ 'discriminator': 'type',
+ 'data': {
+ 'nbd': 'BlockExportNbd'
+ } }
+
##
# @QuorumOpType:
#
diff --git a/qemu-storage-daemon.c b/qemu-storage-daemon.c
index 276a412915..5904d3c5b4 100644
--- a/qemu-storage-daemon.c
+++ b/qemu-storage-daemon.c
@@ -70,6 +70,11 @@ static void help(void)
" [,driver specific parameters...]\n"
" configure a block backend\n"
"\n"
+" --export [type=]nbd,device=<node-name>[,name=<export-name>]\n"
+" [,writable=on|off][,bitmap=<name>]\n"
+" export the specified block node over NBD\n"
+" (requires --nbd-server)\n"
+"\n"
" --nbd-server addr.type=inet,addr.host=<host>,addr.port=<port>\n"
" [,tls-creds=<id>][,tls-authz=<id>]\n"
" --nbd-server addr.type=unix,addr.path=<path>\n"
@@ -91,6 +96,7 @@ QEMU_HELP_BOTTOM "\n",
enum {
OPTION_BLOCKDEV = 256,
+ OPTION_EXPORT,
OPTION_NBD_SERVER,
OPTION_OBJECT,
};
@@ -104,12 +110,24 @@ static QemuOptsList qemu_object_opts = {
},
};
+static void init_export(BlockExport *export, Error **errp)
+{
+ switch (export->type) {
+ case BLOCK_EXPORT_TYPE_NBD:
+ qmp_nbd_server_add(&export->u.nbd, errp);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+}
+
static void process_options(int argc, char *argv[])
{
int c;
static const struct option long_options[] = {
{"blockdev", required_argument, NULL, OPTION_BLOCKDEV},
+ {"export", required_argument, NULL, OPTION_EXPORT},
{"help", no_argument, NULL, 'h'},
{"nbd-server", required_argument, NULL, OPTION_NBD_SERVER},
{"object", required_argument, NULL, OPTION_OBJECT},
@@ -156,6 +174,19 @@ static void process_options(int argc, char *argv[])
qapi_free_BlockdevOptions(options);
break;
}
+ case OPTION_EXPORT:
+ {
+ Visitor *v;
+ BlockExport *export;
+
+ v = qobject_input_visitor_new_str(optarg, "type",
&error_fatal);
+ visit_type_BlockExport(v, NULL, &export, &error_fatal);
+ visit_free(v);
+
+ init_export(export, &error_fatal);
+ qapi_free_BlockExport(export);
+ break;
+ }
case OPTION_NBD_SERVER:
{
Visitor *v;
--
2.20.1
- [PATCH v2 01/20] qemu-storage-daemon: Add barebone tool, (continued)
- [PATCH v2 01/20] qemu-storage-daemon: Add barebone tool, Kevin Wolf, 2020/02/24
- [PATCH v2 04/20] block: Move common QMP commands to block-core QAPI module, Kevin Wolf, 2020/02/24
- [PATCH v2 03/20] block: Move system emulator QMP commands to block/qapi-sysemu.c, Kevin Wolf, 2020/02/24
- [PATCH v2 05/20] block: Move sysemu QMP commands to QAPI block module, Kevin Wolf, 2020/02/24
- [PATCH v2 08/20] qemu-storage-daemon: Add --object option, Kevin Wolf, 2020/02/24
- [PATCH v2 06/20] qemu-storage-daemon: Add --blockdev option, Kevin Wolf, 2020/02/24
- [PATCH v2 07/20] qapi: Flatten object-add, Kevin Wolf, 2020/02/24
- [PATCH v2 09/20] qemu-storage-daemon: Add --nbd-server option, Kevin Wolf, 2020/02/24
- [PATCH v2 10/20] blockdev-nbd: Boxed argument type for nbd-server-add, Kevin Wolf, 2020/02/24
- [PATCH v2 12/20] qemu-storage-daemon: Add main loop, Kevin Wolf, 2020/02/24
- [PATCH v2 11/20] qemu-storage-daemon: Add --export option,
Kevin Wolf <=
- [PATCH v2 13/20] qemu-storage-daemon: Add --chardev option, Kevin Wolf, 2020/02/24
- [PATCH v2 14/20] stubs: Update monitor stubs for qemu-storage-daemon, Kevin Wolf, 2020/02/24
- [PATCH v2 16/20] monitor: Create QAPIfied monitor_init(), Kevin Wolf, 2020/02/24
- [PATCH v2 15/20] qapi: Create 'pragma' module, Kevin Wolf, 2020/02/24
- [PATCH v2 17/20] qmp: Fail gracefully if chardev is already in use, Kevin Wolf, 2020/02/24
- [PATCH v2 18/20] hmp: Fail gracefully if chardev is already in use, Kevin Wolf, 2020/02/24
- [PATCH v2 19/20] monitor: Add allow_hmp parameter to monitor_init(), Kevin Wolf, 2020/02/24
- [PATCH v2 20/20] qemu-storage-daemon: Add --monitor option, Kevin Wolf, 2020/02/24
- Re: [PATCH v2 00/20] Add qemu-storage-daemon, no-reply, 2020/02/24
- Re: [PATCH v2 00/20] Add qemu-storage-daemon, Stefan Hajnoczi, 2020/02/28