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authorDaniel P. Berrange <berrange@redhat.com>2016-02-10 18:41:14 +0000
committerPaolo Bonzini <pbonzini@redhat.com>2016-02-16 17:17:49 +0100
commitddffee3904828f11d596a13bd3c8960d747c66d8 (patch)
treefbd815059b4a89febe1129d44363531419b0b545 /blockdev-nbd.c
parent145614a112a8e67d6c84b26faaf2b2002e17d9be (diff)
nbd: enable use of TLS with nbd-server-start command
This modifies the nbd-server-start QMP command so that it is possible to request use of TLS. This is done by adding a new optional parameter "tls-creds" which provides the ID of a previously created QCryptoTLSCreds object instance. TLS is only supported when using an IPv4/IPv6 socket listener. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1455129674-17255-17-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'blockdev-nbd.c')
-rw-r--r--blockdev-nbd.c122
1 files changed, 100 insertions, 22 deletions
diff --git a/blockdev-nbd.c b/blockdev-nbd.c
index f181840e2a..12cae0ea72 100644
--- a/blockdev-nbd.c
+++ b/blockdev-nbd.c
@@ -20,42 +20,126 @@
#include "block/nbd.h"
#include "io/channel-socket.h"
-static QIOChannelSocket *server_ioc;
-static int server_watch = -1;
+typedef struct NBDServerData {
+ QIOChannelSocket *listen_ioc;
+ int watch;
+ QCryptoTLSCreds *tlscreds;
+} NBDServerData;
+
+static NBDServerData *nbd_server;
+
static gboolean nbd_accept(QIOChannel *ioc, GIOCondition condition,
gpointer opaque)
{
QIOChannelSocket *cioc;
+ if (!nbd_server) {
+ return FALSE;
+ }
+
cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc),
NULL);
if (!cioc) {
return TRUE;
}
- nbd_client_new(NULL, cioc, NULL, NULL, nbd_client_put);
+ nbd_client_new(NULL, cioc,
+ nbd_server->tlscreds, NULL,
+ nbd_client_put);
object_unref(OBJECT(cioc));
return TRUE;
}
-void qmp_nbd_server_start(SocketAddress *addr, Error **errp)
+
+static void nbd_server_free(NBDServerData *server)
{
- if (server_ioc) {
- error_setg(errp, "NBD server already running");
+ if (!server) {
return;
}
- server_ioc = qio_channel_socket_new();
- if (qio_channel_socket_listen_sync(server_ioc, addr, errp) < 0) {
+ if (server->watch != -1) {
+ g_source_remove(server->watch);
+ }
+ object_unref(OBJECT(server->listen_ioc));
+ if (server->tlscreds) {
+ object_unref(OBJECT(server->tlscreds));
+ }
+
+ g_free(server);
+}
+
+static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp)
+{
+ Object *obj;
+ QCryptoTLSCreds *creds;
+
+ obj = object_resolve_path_component(
+ object_get_objects_root(), id);
+ if (!obj) {
+ error_setg(errp, "No TLS credentials with id '%s'",
+ id);
+ return NULL;
+ }
+ creds = (QCryptoTLSCreds *)
+ object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS);
+ if (!creds) {
+ error_setg(errp, "Object with id '%s' is not TLS credentials",
+ id);
+ return NULL;
+ }
+
+ if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
+ error_setg(errp,
+ "Expecting TLS credentials with a server endpoint");
+ return NULL;
+ }
+ object_ref(obj);
+ return creds;
+}
+
+
+void qmp_nbd_server_start(SocketAddress *addr,
+ bool has_tls_creds, const char *tls_creds,
+ Error **errp)
+{
+ if (nbd_server) {
+ error_setg(errp, "NBD server already running");
return;
}
- server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc),
- G_IO_IN,
- nbd_accept,
- NULL,
- NULL);
+ nbd_server = g_new0(NBDServerData, 1);
+ nbd_server->watch = -1;
+ nbd_server->listen_ioc = qio_channel_socket_new();
+ if (qio_channel_socket_listen_sync(
+ nbd_server->listen_ioc, addr, errp) < 0) {
+ goto error;
+ }
+
+ if (has_tls_creds) {
+ nbd_server->tlscreds = nbd_get_tls_creds(tls_creds, errp);
+ if (!nbd_server->tlscreds) {
+ goto error;
+ }
+
+ if (addr->type != SOCKET_ADDRESS_KIND_INET) {
+ error_setg(errp, "TLS is only supported with IPv4/IPv6");
+ goto error;
+ }
+ }
+
+ nbd_server->watch = qio_channel_add_watch(
+ QIO_CHANNEL(nbd_server->listen_ioc),
+ G_IO_IN,
+ nbd_accept,
+ NULL,
+ NULL);
+
+ return;
+
+ error:
+ nbd_server_free(nbd_server);
+ nbd_server = NULL;
}
void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
@@ -64,7 +148,7 @@ void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
BlockBackend *blk;
NBDExport *exp;
- if (!server_ioc) {
+ if (!nbd_server) {
error_setg(errp, "NBD server not running");
return;
}
@@ -110,12 +194,6 @@ void qmp_nbd_server_stop(Error **errp)
{
nbd_export_close_all();
- if (server_watch != -1) {
- g_source_remove(server_watch);
- server_watch = -1;
- }
- if (server_ioc) {
- object_unref(OBJECT(server_ioc));
- server_ioc = NULL;
- }
+ nbd_server_free(nbd_server);
+ nbd_server = NULL;
}