From 9445673ea67c272616b9f718396e267caa6446b7 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Thu, 30 Mar 2017 19:43:16 +0200 Subject: [PATCH] nbd: Tidy up blockdev-add interface SocketAddress is a simple union, and simple unions are awkward: they have their variant members wrapped in a "data" object on the wire, and require additional indirections in C. I intend to limit its use to existing external interfaces, and convert all internal interfaces to SocketAddressFlat. BlockdevOptionsNbd is an external interface using SocketAddress. We already use SocketAddressFlat elsewhere in blockdev-add. Replace it by SocketAddressFlat while we can (it's new in 2.9) for simplicity and consistency. For example, { "execute": "blockdev-add", "arguments": { "node-name": "foo", "driver": "nbd", "server": { "type": "inet", "data": { "host": "localhost", "port": "12345" } } } } becomes { "execute": "blockdev-add", "arguments": { "node-name": "foo", "driver": "nbd", "server": { "type": "inet", "host": "localhost", "port": "12345" } } } Since the internal interfaces still take SocketAddress, this requires conversion function socket_address_crumple(). It'll go away when I update the interfaces. Unfortunately, SocketAddress is also visible in -drive since 2.8: -drive if=none,driver=nbd,server.type=inet,server.data.host=127.0.0.1,server.data.port=12345 Nobody should be using it, as it's fairly new and has never been documented, so adding still more compatibility gunk to keep it working isn't worth the trouble. You now have to use -drive if=none,driver=nbd,server.type=inet,server.host=127.0.0.1,server.port=12345 Signed-off-by: Markus Armbruster Message-id: 1490895797-29094-9-git-send-email-armbru@redhat.com [mreitz: Change iotest 147 accordingly] Because of this interface change, iotest 147 has to be adapted. Unfortunately, we cannot just flatten all of the addresses because nbd-server-start still takes a plain SocketAddress. Therefore, we need both and this is most easily achieved by writing the SocketAddress into the code and flattening it where necessary. Signed-off-by: Max Reitz Message-id: 20170330221243.17333-1-mreitz@redhat.com Reviewed-by: Eric Blake Signed-off-by: Max Reitz --- block/nbd.c | 53 ++++++++++++++++++++++++++------------------------ qapi/block-core.json | 2 +- tests/qemu-iotests/147 | 25 ++++++++++++++++-------- 3 files changed, 46 insertions(+), 34 deletions(-) diff --git a/block/nbd.c b/block/nbd.c index 11e3ba75fa..8bb29a90bb 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -47,7 +47,7 @@ typedef struct BDRVNBDState { NBDClientSession client; /* For nbd_refresh_filename() */ - SocketAddress *saddr; + SocketAddressFlat *saddr; char *export, *tlscredsid; } BDRVNBDState; @@ -95,7 +95,7 @@ static int nbd_parse_uri(const char *filename, QDict *options) goto out; } qdict_put(options, "server.type", qstring_from_str("unix")); - qdict_put(options, "server.data.path", + qdict_put(options, "server.path", qstring_from_str(qp->p[0].value)); } else { QString *host; @@ -116,10 +116,10 @@ static int nbd_parse_uri(const char *filename, QDict *options) } qdict_put(options, "server.type", qstring_from_str("inet")); - qdict_put(options, "server.data.host", host); + qdict_put(options, "server.host", host); port_str = g_strdup_printf("%d", uri->port ?: NBD_DEFAULT_PORT); - qdict_put(options, "server.data.port", qstring_from_str(port_str)); + qdict_put(options, "server.port", qstring_from_str(port_str)); g_free(port_str); } @@ -197,7 +197,7 @@ static void nbd_parse_filename(const char *filename, QDict *options, /* are we a UNIX or TCP socket? */ if (strstart(host_spec, "unix:", &unixpath)) { qdict_put(options, "server.type", qstring_from_str("unix")); - qdict_put(options, "server.data.path", qstring_from_str(unixpath)); + qdict_put(options, "server.path", qstring_from_str(unixpath)); } else { InetSocketAddress *addr = NULL; @@ -207,8 +207,8 @@ static void nbd_parse_filename(const char *filename, QDict *options, } qdict_put(options, "server.type", qstring_from_str("inet")); - qdict_put(options, "server.data.host", qstring_from_str(addr->host)); - qdict_put(options, "server.data.port", qstring_from_str(addr->port)); + qdict_put(options, "server.host", qstring_from_str(addr->host)); + qdict_put(options, "server.port", qstring_from_str(addr->port)); qapi_free_InetSocketAddress(addr); } @@ -248,20 +248,21 @@ static bool nbd_process_legacy_socket_options(QDict *output_options, } qdict_put(output_options, "server.type", qstring_from_str("unix")); - qdict_put(output_options, "server.data.path", qstring_from_str(path)); + qdict_put(output_options, "server.path", qstring_from_str(path)); } else if (host) { qdict_put(output_options, "server.type", qstring_from_str("inet")); - qdict_put(output_options, "server.data.host", qstring_from_str(host)); - qdict_put(output_options, "server.data.port", + qdict_put(output_options, "server.host", qstring_from_str(host)); + qdict_put(output_options, "server.port", qstring_from_str(port ?: stringify(NBD_DEFAULT_PORT))); } return true; } -static SocketAddress *nbd_config(BDRVNBDState *s, QDict *options, Error **errp) +static SocketAddressFlat *nbd_config(BDRVNBDState *s, QDict *options, + Error **errp) { - SocketAddress *saddr = NULL; + SocketAddressFlat *saddr = NULL; QDict *addr = NULL; QObject *crumpled_addr = NULL; Visitor *iv = NULL; @@ -287,7 +288,7 @@ static SocketAddress *nbd_config(BDRVNBDState *s, QDict *options, Error **errp) * visitor expects the former. */ iv = qobject_input_visitor_new(crumpled_addr); - visit_type_SocketAddress(iv, NULL, &saddr, &local_err); + visit_type_SocketAddressFlat(iv, NULL, &saddr, &local_err); if (local_err) { error_propagate(errp, local_err); goto done; @@ -306,9 +307,10 @@ NBDClientSession *nbd_get_client_session(BlockDriverState *bs) return &s->client; } -static QIOChannelSocket *nbd_establish_connection(SocketAddress *saddr, +static QIOChannelSocket *nbd_establish_connection(SocketAddressFlat *saddr_flat, Error **errp) { + SocketAddress *saddr = socket_address_crumple(saddr_flat); QIOChannelSocket *sioc; Error *local_err = NULL; @@ -318,6 +320,7 @@ static QIOChannelSocket *nbd_establish_connection(SocketAddress *saddr, qio_channel_socket_connect_sync(sioc, saddr, &local_err); + qapi_free_SocketAddress(saddr); if (local_err) { error_propagate(errp, local_err); return NULL; @@ -409,7 +412,7 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags, goto error; } - /* Translate @host, @port, and @path to a SocketAddress */ + /* Translate @host, @port, and @path to a SocketAddressFlat */ if (!nbd_process_legacy_socket_options(options, opts, errp)) { goto error; } @@ -430,11 +433,11 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags, } /* TODO SOCKET_ADDRESS_KIND_FD where fd has AF_INET or AF_INET6 */ - if (s->saddr->type != SOCKET_ADDRESS_KIND_INET) { + if (s->saddr->type != SOCKET_ADDRESS_FLAT_TYPE_INET) { error_setg(errp, "TLS only supported over IP sockets"); goto error; } - hostname = s->saddr->u.inet.data->host; + hostname = s->saddr->u.inet.host; } /* establish TCP connection, return error if it fails @@ -457,7 +460,7 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags, object_unref(OBJECT(tlscreds)); } if (ret < 0) { - qapi_free_SocketAddress(s->saddr); + qapi_free_SocketAddressFlat(s->saddr); g_free(s->export); g_free(s->tlscredsid); } @@ -483,7 +486,7 @@ static void nbd_close(BlockDriverState *bs) nbd_client_close(bs); - qapi_free_SocketAddress(s->saddr); + qapi_free_SocketAddressFlat(s->saddr); g_free(s->export); g_free(s->tlscredsid); } @@ -514,15 +517,15 @@ static void nbd_refresh_filename(BlockDriverState *bs, QDict *options) Visitor *ov; const char *host = NULL, *port = NULL, *path = NULL; - if (s->saddr->type == SOCKET_ADDRESS_KIND_INET) { - const InetSocketAddress *inet = s->saddr->u.inet.data; + if (s->saddr->type == SOCKET_ADDRESS_FLAT_TYPE_INET) { + const InetSocketAddress *inet = &s->saddr->u.inet; if (!inet->has_ipv4 && !inet->has_ipv6 && !inet->has_to) { host = inet->host; port = inet->port; } - } else if (s->saddr->type == SOCKET_ADDRESS_KIND_UNIX) { - path = s->saddr->u.q_unix.data->path; - } + } else if (s->saddr->type == SOCKET_ADDRESS_FLAT_TYPE_UNIX) { + path = s->saddr->u.q_unix.path; + } /* else can't represent as pseudo-filename */ qdict_put(opts, "driver", qstring_from_str("nbd")); @@ -541,7 +544,7 @@ static void nbd_refresh_filename(BlockDriverState *bs, QDict *options) } ov = qobject_output_visitor_new(&saddr_qdict); - visit_type_SocketAddress(ov, NULL, &s->saddr, &error_abort); + visit_type_SocketAddressFlat(ov, NULL, &s->saddr, &error_abort); visit_complete(ov, &saddr_qdict); visit_free(ov); qdict_put_obj(opts, "server", saddr_qdict); diff --git a/qapi/block-core.json b/qapi/block-core.json index 8de39d143a..e4d8a63575 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -2847,7 +2847,7 @@ # Since: 2.9 ## { 'struct': 'BlockdevOptionsNbd', - 'data': { 'server': 'SocketAddress', + 'data': { 'server': 'SocketAddressFlat', '*export': 'str', '*tls-creds': 'str' } } diff --git a/tests/qemu-iotests/147 b/tests/qemu-iotests/147 index cca75c562c..32afea63d4 100755 --- a/tests/qemu-iotests/147 +++ b/tests/qemu-iotests/147 @@ -30,6 +30,13 @@ NBD_PORT = 10811 test_img = os.path.join(iotests.test_dir, 'test.img') unix_socket = os.path.join(iotests.test_dir, 'nbd.socket') + +def flatten_sock_addr(crumpled_address): + result = { 'type': crumpled_address['type'] } + result.update(crumpled_address['data']) + return result + + class NBDBlockdevAddBase(iotests.QMPTestCase): def blockdev_add_options(self, address, export=None): options = { 'node-name': 'nbd-blockdev', @@ -85,13 +92,15 @@ class QemuNBD(NBDBlockdevAddBase): 'host': 'localhost', 'port': str(NBD_PORT) } } - self.client_test('nbd://localhost:%i' % NBD_PORT, address) + self.client_test('nbd://localhost:%i' % NBD_PORT, + flatten_sock_addr(address)) def test_unix(self): self._server_up('-k', unix_socket) address = { 'type': 'unix', 'data': { 'path': unix_socket } } - self.client_test('nbd+unix://?socket=' + unix_socket, address) + self.client_test('nbd+unix://?socket=' + unix_socket, + flatten_sock_addr(address)) class BuiltinNBD(NBDBlockdevAddBase): @@ -134,7 +143,7 @@ class BuiltinNBD(NBDBlockdevAddBase): } } self._server_up(address) self.client_test('nbd://localhost:%i/nbd-export' % NBD_PORT, - address, 'nbd-export') + flatten_sock_addr(address), 'nbd-export') self._server_down() def test_inet6(self): @@ -149,10 +158,10 @@ class BuiltinNBD(NBDBlockdevAddBase): 'file': { 'driver': 'nbd', 'export': 'nbd-export', - 'server': address + 'server': flatten_sock_addr(address) } } self._server_up(address) - self.client_test(filename, address, 'nbd-export') + self.client_test(filename, flatten_sock_addr(address), 'nbd-export') self._server_down() def test_unix(self): @@ -160,7 +169,7 @@ class BuiltinNBD(NBDBlockdevAddBase): 'data': { 'path': unix_socket } } self._server_up(address) self.client_test('nbd+unix:///nbd-export?socket=' + unix_socket, - address, 'nbd-export') + flatten_sock_addr(address), 'nbd-export') self._server_down() def test_fd(self): @@ -182,9 +191,9 @@ class BuiltinNBD(NBDBlockdevAddBase): 'file': { 'driver': 'nbd', 'export': 'nbd-export', - 'server': address + 'server': flatten_sock_addr(address) } } - self.client_test(filename, address, 'nbd-export') + self.client_test(filename, flatten_sock_addr(address), 'nbd-export') self._server_down() -- 2.11.4.GIT