kconfig: add documentation

[qemu.git] / blockdev-nbd.c

diff --git a/blockdev-nbd.c b/blockdev-nbd.c
index 2148753fff3988a443a2f15f944504af663db19a..d73ac1b026af0bcd755236ff8f92514b59613576 100644 (file)
--- a/blockdev-nbd.c
+++ b/blockdev-nbd.c
@@ -13,109 +13,222 @@
 #include "sysemu/blockdev.h"
 #include "sysemu/block-backend.h"
 #include "hw/block/block.h"
 #include "sysemu/blockdev.h"
 #include "sysemu/block-backend.h"
 #include "hw/block/block.h"

-#include "qapi/qmp/qerror.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-block.h"

 #include "sysemu/sysemu.h"
 #include "sysemu/sysemu.h"

-#include "qmp-commands.h"
-#include "trace.h"

 #include "block/nbd.h"
 #include "io/channel-socket.h"
 #include "block/nbd.h"
 #include "io/channel-socket.h"

+#include "io/net-listener.h"

 
 

-static QIOChannelSocket *server_ioc;
-static int server_watch = -1;
+typedef struct NBDServerData {
+    QIONetListener *listener;
+    QCryptoTLSCreds *tlscreds;
+} NBDServerData;

 
 

-static gboolean nbd_accept(QIOChannel *ioc, GIOCondition condition,
-                           gpointer opaque)
+static NBDServerData *nbd_server;
+
+static void nbd_blockdev_client_closed(NBDClient *client, bool ignored)

 {
 {

-    QIOChannelSocket *cioc;
+    nbd_client_put(client);
+}

 
 

-    cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc),
-                                     NULL);
-    if (!cioc) {
-        return TRUE;
+static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc,
+                       gpointer opaque)
+{
+    qio_channel_set_name(QIO_CHANNEL(cioc), "nbd-server");
+    nbd_client_new(cioc, nbd_server->tlscreds, NULL,
+                   nbd_blockdev_client_closed);
+}
+
+
+static void nbd_server_free(NBDServerData *server)
+{
+    if (!server) {
+        return;
+    }
+
+    qio_net_listener_disconnect(server->listener);
+    object_unref(OBJECT(server->listener));
+    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;

     }
 
     }
 

-    nbd_client_new(NULL, cioc, nbd_client_put);
-    object_unref(OBJECT(cioc));
-    return TRUE;
+    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, Error **errp)
+
+void nbd_server_start(SocketAddress *addr, const char *tls_creds,
+                      Error **errp)

 {
 {

-    if (server_ioc) {
+    if (nbd_server) {

         error_setg(errp, "NBD server already running");
         return;
     }
 
         error_setg(errp, "NBD server already running");
         return;
     }
 

-    server_ioc = qio_channel_socket_new();
-    if (qio_channel_socket_listen_sync(server_ioc, addr, errp) < 0) {
-        return;
+    nbd_server = g_new0(NBDServerData, 1);
+    nbd_server->listener = qio_net_listener_new();
+
+    qio_net_listener_set_name(nbd_server->listener,
+                              "nbd-listener");
+
+    if (qio_net_listener_open_sync(nbd_server->listener, addr, errp) < 0) {
+        goto error;
+    }
+
+    if (tls_creds) {
+        nbd_server->tlscreds = nbd_get_tls_creds(tls_creds, errp);
+        if (!nbd_server->tlscreds) {
+            goto error;
+        }
+
+        /* TODO SOCKET_ADDRESS_TYPE_FD where fd has AF_INET or AF_INET6 */
+        if (addr->type != SOCKET_ADDRESS_TYPE_INET) {
+            error_setg(errp, "TLS is only supported with IPv4/IPv6");
+            goto error;
+        }

     }
 
     }
 

-    server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc),
-                                         G_IO_IN,
-                                         nbd_accept,
-                                         NULL,
-                                         NULL);
+    qio_net_listener_set_client_func(nbd_server->listener,
+                                     nbd_accept,
+                                     NULL,
+                                     NULL);
+
+    return;
+
+ error:
+    nbd_server_free(nbd_server);
+    nbd_server = NULL;
+}
+
+void qmp_nbd_server_start(SocketAddressLegacy *addr,
+                          bool has_tls_creds, const char *tls_creds,
+                          Error **errp)
+{
+    SocketAddress *addr_flat = socket_address_flatten(addr);
+
+    nbd_server_start(addr_flat, tls_creds, errp);
+    qapi_free_SocketAddress(addr_flat);

 }
 
 }
 

-void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
-                        Error **errp)
+void qmp_nbd_server_add(const char *device, bool has_name, const char *name,
+                        bool has_writable, bool writable,
+                        bool has_bitmap, const char *bitmap, Error **errp)

 {
 {

-    BlockBackend *blk;
+    BlockDriverState *bs = NULL;
+    BlockBackend *on_eject_blk;

     NBDExport *exp;
     NBDExport *exp;

+    int64_t len;

 
 

-    if (!server_ioc) {
+    if (!nbd_server) {

         error_setg(errp, "NBD server not running");
         return;
     }
 
         error_setg(errp, "NBD server not running");
         return;
     }
 

-    if (nbd_export_find(device)) {
-        error_setg(errp, "NBD server already exporting device '%s'", device);
+    if (!has_name) {
+        name = device;
+    }
+
+    if (nbd_export_find(name)) {
+        error_setg(errp, "NBD server already has export named '%s'", name);

         return;
     }
 
         return;
     }
 

-    blk = blk_by_name(device);
-    if (!blk) {
-        error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
-                  "Device '%s' not found", device);
+    on_eject_blk = blk_by_name(device);
+
+    bs = bdrv_lookup_bs(device, device, errp);
+    if (!bs) {

         return;
     }
         return;
     }

-    if (!blk_is_inserted(blk)) {
-        error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
+
+    len = bdrv_getlength(bs);
+    if (len < 0) {
+        error_setg_errno(errp, -len,
+                         "Failed to determine the NBD export's length");

         return;
     }
 
     if (!has_writable) {
         writable = false;
     }
         return;
     }
 
     if (!has_writable) {
         writable = false;
     }

-    if (blk_is_read_only(blk)) {
+    if (bdrv_is_read_only(bs)) {

         writable = false;
     }
 
         writable = false;
     }
 

-    exp = nbd_export_new(blk, 0, -1, writable ? 0 : NBD_FLAG_READ_ONLY, NULL,
-                         errp);
+    exp = nbd_export_new(bs, 0, len, name, NULL, bitmap,
+                         writable ? 0 : NBD_FLAG_READ_ONLY,
+                         NULL, false, on_eject_blk, errp);

     if (!exp) {
         return;
     }
 
     if (!exp) {
         return;
     }
 

-    nbd_export_set_name(exp, device);
-

     /* The list of named exports has a strong reference to this export now and
      * our only way of accessing it is through nbd_export_find(), so we can drop
      * the strong reference that is @exp. */
     nbd_export_put(exp);
 }
 
     /* The list of named exports has a strong reference to this export now and
      * our only way of accessing it is through nbd_export_find(), so we can drop
      * the strong reference that is @exp. */
     nbd_export_put(exp);
 }
 

-void qmp_nbd_server_stop(Error **errp)
+void qmp_nbd_server_remove(const char *name,
+                           bool has_mode, NbdServerRemoveMode mode,
+                           Error **errp)

 {
 {

-    nbd_export_close_all();
+    NBDExport *exp;
+
+    if (!nbd_server) {
+        error_setg(errp, "NBD server not running");
+        return;
+    }
+
+    exp = nbd_export_find(name);
+    if (exp == NULL) {
+        error_setg(errp, "Export '%s' is not found", name);
+        return;
+    }

 
 

-    if (server_watch != -1) {
-        g_source_remove(server_watch);
-        server_watch = -1;
+    if (!has_mode) {
+        mode = NBD_SERVER_REMOVE_MODE_SAFE;

     }
     }

-    if (server_ioc) {
-        object_unref(OBJECT(server_ioc));
-        server_ioc = NULL;
+
+    nbd_export_remove(exp, mode, errp);
+}
+
+void qmp_nbd_server_stop(Error **errp)
+{
+    if (!nbd_server) {
+        error_setg(errp, "NBD server not running");
+        return;

     }
     }

+
+    nbd_export_close_all();
+
+    nbd_server_free(nbd_server);
+    nbd_server = NULL;

 }
 }