qemu-storage-daemon: Add --nbd-server option

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 <kwolf@redhat.com>
Message-Id: <20200224143008.13362-10-kwolf@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2020-02-24 15:29:57 +01:00
parent d6da78b5fd
commit eed8b69178
5 changed files with 56 additions and 2 deletions

View file

@ -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

View file

@ -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,

View file

@ -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.

View file

@ -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',

View file

@ -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;