Add a --nbd-server option to qemu-storage-daemon to start the built-in
NBD server right away. It maps the arguments for nbd-server-start to the
command line, with the exception that it uses SocketAddress instead of
SocketAddressLegacy: New interfaces shouldn't use legacy types, and the
additional nesting would be nasty on the command line.
Example (only with required options):
--nbd-server addr.type=inet,addr.host=localhost,addr.port=10809
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
qapi/block-core.json | 24 ++++++++++++++++++++++++
include/block/nbd.h | 1 +
blockdev-nbd.c | 5 +++++
qemu-storage-daemon.c | 26 +++++++++++++++++++++++++-
Makefile.objs | 2 +-
5 files changed, 56 insertions(+), 2 deletions(-)
diff --git a/qapi/block-core.json b/qapi/block-core.json
index b65b6a9f49..f8888f06c8 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -5062,6 +5062,27 @@
'iothread': 'StrOrNull',
'*force': 'bool' } }
+##
+# @NbdServerOptions:
+#
+# @addr: Address on which to listen.
+# @tls-creds: ID of the TLS credentials object (since 2.6).
+# @tls-authz: ID of the QAuthZ authorization object used to validate
+# the client's x509 distinguished name. This object is
+# is only resolved at time of use, so can be deleted and
+# recreated on the fly while the NBD server is active.
+# If missing, it will default to denying access (since 4.0).
+#
+# Keep this type consistent with the nbd-server-start arguments. The only
+# intended difference is using SocketAddress instead of SocketAddressLegacy.
+#
+# Since: 4.2
+##
+{ 'struct': 'NbdServerOptions',
+ 'data': { 'addr': 'SocketAddress',
+ '*tls-creds': 'str',
+ '*tls-authz': 'str'} }
+
##
# @nbd-server-start:
#
@@ -5080,6 +5101,9 @@
#
# Returns: error if the server is already running.
#
+# Keep this type consistent with the NbdServerOptions type. The only intended
+# difference is using SocketAddressLegacy instead of SocketAddress.
+#
# Since: 1.3.0
##
{ 'command': 'nbd-server-start',
diff --git a/include/block/nbd.h b/include/block/nbd.h
index 7f46932d80..20363280ae 100644
--- a/include/block/nbd.h
+++ b/include/block/nbd.h
@@ -353,6 +353,7 @@ void nbd_client_put(NBDClient *client);
void nbd_server_start(SocketAddress *addr, const char *tls_creds,
const char *tls_authz, Error **errp);
+void nbd_server_start_options(NbdServerOptions *arg, Error **errp);
/* nbd_read
* Reads @size bytes from @ioc. Returns 0 on success.
diff --git a/blockdev-nbd.c b/blockdev-nbd.c
index de2f2ff713..d8c892f7da 100644
--- a/blockdev-nbd.c
+++ b/blockdev-nbd.c
@@ -132,6 +132,11 @@ void nbd_server_start(SocketAddress *addr, const char
*tls_creds,
nbd_server = NULL;
}
+void nbd_server_start_options(NbdServerOptions *arg, Error **errp)
+{
+ nbd_server_start(arg->addr, arg->tls_creds, arg->tls_authz, errp);
+}
+
void qmp_nbd_server_start(SocketAddressLegacy *addr,
bool has_tls_creds, const char *tls_creds,
bool has_tls_authz, const char *tls_authz,
diff --git a/qemu-storage-daemon.c b/qemu-storage-daemon.c
index 0cd8144c81..276a412915 100644
--- a/qemu-storage-daemon.c
+++ b/qemu-storage-daemon.c
@@ -28,11 +28,14 @@
#include <getopt.h>
#include "block/block.h"
+#include "block/nbd.h"
#include "crypto/init.h"
#include "qapi/error.h"
-#include "qapi/qapi-visit-block-core.h"
+#include "qapi/qapi-commands-block.h"
#include "qapi/qapi-commands-block-core.h"
+#include "qapi/qapi-visit-block.h"
+#include "qapi/qapi-visit-block-core.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qobject-input-visitor.h"
@@ -67,6 +70,12 @@ static void help(void)
" [,driver specific parameters...]\n"
" configure a block backend\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"
+" [,tls-creds=<id>][,tls-authz=<id>]\n"
+" start an NBD server for exporting block nodes\n"
+"\n"
" --object help list object types that can be added\n"
" --object <type>,help list properties for the given object type\n"
" --object <type>[,<property>=<value>...]\n"
@@ -82,6 +91,7 @@ QEMU_HELP_BOTTOM "\n",
enum {
OPTION_BLOCKDEV = 256,
+ OPTION_NBD_SERVER,
OPTION_OBJECT,
};
@@ -101,6 +111,7 @@ static void process_options(int argc, char *argv[])
static const struct option long_options[] = {
{"blockdev", required_argument, NULL, OPTION_BLOCKDEV},
{"help", no_argument, NULL, 'h'},
+ {"nbd-server", required_argument, NULL, OPTION_NBD_SERVER},
{"object", required_argument, NULL, OPTION_OBJECT},
{"trace", required_argument, NULL, 'T'},
{"version", no_argument, NULL, 'V'},
@@ -145,6 +156,19 @@ static void process_options(int argc, char *argv[])
qapi_free_BlockdevOptions(options);
break;
}
+ case OPTION_NBD_SERVER:
+ {
+ Visitor *v;
+ NbdServerOptions *options;
+
+ v = qobject_input_visitor_new_str(optarg, NULL, &error_fatal);
+ visit_type_NbdServerOptions(v, NULL, &options, &error_fatal);
+ visit_free(v);
+
+ nbd_server_start_options(options, &error_fatal);
+ qapi_free_NbdServerOptions(options);
+ break;
+ }
case OPTION_OBJECT:
{
QemuOpts *opts;
diff --git a/Makefile.objs b/Makefile.objs
index fa92b00427..25ab313690 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -32,7 +32,7 @@ endif # CONFIG_SOFTMMU or CONFIG_TOOLS
# used for system emulation, too, but specified separately there)
storage-daemon-obj-y = block/ qom/
-storage-daemon-obj-y += blockdev.o iothread.o
+storage-daemon-obj-y += blockdev.o blockdev-nbd.o iothread.o
######################################################################
# Target independent part of system emulation. The long term path is to
--
2.20.1
