1 files changed, 71 insertions, 42 deletions

diff --git a/qemu/block/nbd-client.c b/qemu/block/nbd-client.c
index e1bb9198c..878e879ac 100644
--- a/qemu/block/nbd-client.c
+++ b/qemu/block/nbd-client.c
@@ -26,8 +26,8 @@
  * THE SOFTWARE.
  */
 
+#include "qemu/osdep.h"
 #include "nbd-client.h"
-#include "qemu/sockets.h"
 
 #define HANDLE_TO_INDEX(bs, handle) ((handle) ^ ((uint64_t)(intptr_t)bs))
 #define INDEX_TO_HANDLE(bs, index)  ((index)  ^ ((uint64_t)(intptr_t)bs))
@@ -47,13 +47,21 @@ static void nbd_teardown_connection(BlockDriverState *bs)
 {
     NbdClientSession *client = nbd_get_client_session(bs);
 
+    if (!client->ioc) { /* Already closed */
+        return;
+    }
+
     /* finish any pending coroutines */
-    shutdown(client->sock, 2);
+    qio_channel_shutdown(client->ioc,
+                         QIO_CHANNEL_SHUTDOWN_BOTH,
+                         NULL);
     nbd_recv_coroutines_enter_all(client);
 
     nbd_client_detach_aio_context(bs);
-    closesocket(client->sock);
-    client->sock = -1;
+    object_unref(OBJECT(client->sioc));
+    client->sioc = NULL;
+    object_unref(OBJECT(client->ioc));
+    client->ioc = NULL;
 }
 
 static void nbd_reply_ready(void *opaque)
@@ -63,12 +71,16 @@ static void nbd_reply_ready(void *opaque)
     uint64_t i;
     int ret;
 
+    if (!s->ioc) { /* Already closed */
+        return;
+    }
+
     if (s->reply.handle == 0) {
         /* No reply already in flight.  Fetch a header.  It is possible
          * that another thread has done the same thing in parallel, so
          * the socket is not readable anymore.
          */
-        ret = nbd_receive_reply(s->sock, &s->reply);
+        ret = nbd_receive_reply(s->ioc, &s->reply);
         if (ret == -EAGAIN) {
             return;
         }
@@ -119,32 +131,36 @@ static int nbd_co_send_request(BlockDriverState *bs,
         }
     }
 
+    g_assert(qemu_in_coroutine());
     assert(i < MAX_NBD_REQUESTS);
     request->handle = INDEX_TO_HANDLE(s, i);
+
+    if (!s->ioc) {
+        qemu_co_mutex_unlock(&s->send_mutex);
+        return -EPIPE;
+    }
+
     s->send_coroutine = qemu_coroutine_self();
     aio_context = bdrv_get_aio_context(bs);
 
-    aio_set_fd_handler(aio_context, s->sock,
+    aio_set_fd_handler(aio_context, s->sioc->fd, false,
                        nbd_reply_ready, nbd_restart_write, bs);
     if (qiov) {
-        if (!s->is_unix) {
-            socket_set_cork(s->sock, 1);
-        }
-        rc = nbd_send_request(s->sock, request);
+        qio_channel_set_cork(s->ioc, true);
+        rc = nbd_send_request(s->ioc, request);
         if (rc >= 0) {
-            ret = qemu_co_sendv(s->sock, qiov->iov, qiov->niov,
-                                offset, request->len);
+            ret = nbd_wr_syncv(s->ioc, qiov->iov, qiov->niov,
+                               offset, request->len, 0);
             if (ret != request->len) {
                 rc = -EIO;
             }
         }
-        if (!s->is_unix) {
-            socket_set_cork(s->sock, 0);
-        }
+        qio_channel_set_cork(s->ioc, false);
     } else {
-        rc = nbd_send_request(s->sock, request);
+        rc = nbd_send_request(s->ioc, request);
     }
-    aio_set_fd_handler(aio_context, s->sock, nbd_reply_ready, NULL, bs);
+    aio_set_fd_handler(aio_context, s->sioc->fd, false,
+                       nbd_reply_ready, NULL, bs);
     s->send_coroutine = NULL;
     qemu_co_mutex_unlock(&s->send_mutex);
     return rc;
@@ -160,12 +176,13 @@ static void nbd_co_receive_reply(NbdClientSession *s,
      * peek at the next reply and avoid yielding if it's ours?  */
     qemu_coroutine_yield();
     *reply = s->reply;
-    if (reply->handle != request->handle) {
+    if (reply->handle != request->handle ||
+        !s->ioc) {
         reply->error = EIO;
     } else {
         if (qiov && reply->error == 0) {
-            ret = qemu_co_recvv(s->sock, qiov->iov, qiov->niov,
-                                offset, request->len);
+            ret = nbd_wr_syncv(s->ioc, qiov->iov, qiov->niov,
+                               offset, request->len, 1);
             if (ret != request->len) {
                 reply->error = EIO;
             }
@@ -226,15 +243,15 @@ static int nbd_co_readv_1(BlockDriverState *bs, int64_t sector_num,
 
 static int nbd_co_writev_1(BlockDriverState *bs, int64_t sector_num,
                            int nb_sectors, QEMUIOVector *qiov,
-                           int offset)
+                           int offset, int *flags)
 {
     NbdClientSession *client = nbd_get_client_session(bs);
     struct nbd_request request = { .type = NBD_CMD_WRITE };
     struct nbd_reply reply;
     ssize_t ret;
 
-    if (!bdrv_enable_write_cache(bs) &&
-        (client->nbdflags & NBD_FLAG_SEND_FUA)) {
+    if ((*flags & BDRV_REQ_FUA) && (client->nbdflags & NBD_FLAG_SEND_FUA)) {
+        *flags &= ~BDRV_REQ_FUA;
         request.type |= NBD_CMD_FLAG_FUA;
     }
 
@@ -274,12 +291,13 @@ int nbd_client_co_readv(BlockDriverState *bs, int64_t sector_num,
 }
 
 int nbd_client_co_writev(BlockDriverState *bs, int64_t sector_num,
-                         int nb_sectors, QEMUIOVector *qiov)
+                         int nb_sectors, QEMUIOVector *qiov, int *flags)
 {
     int offset = 0;
     int ret;
     while (nb_sectors > NBD_MAX_SECTORS) {
-        ret = nbd_co_writev_1(bs, sector_num, NBD_MAX_SECTORS, qiov, offset);
+        ret = nbd_co_writev_1(bs, sector_num, NBD_MAX_SECTORS, qiov, offset,
+                              flags);
         if (ret < 0) {
             return ret;
         }
@@ -287,7 +305,7 @@ int nbd_client_co_writev(BlockDriverState *bs, int64_t sector_num,
         sector_num += NBD_MAX_SECTORS;
         nb_sectors -= NBD_MAX_SECTORS;
     }
-    return nbd_co_writev_1(bs, sector_num, nb_sectors, qiov, offset);
+    return nbd_co_writev_1(bs, sector_num, nb_sectors, qiov, offset, flags);
 }
 
 int nbd_client_co_flush(BlockDriverState *bs)
@@ -301,10 +319,6 @@ int nbd_client_co_flush(BlockDriverState *bs)
         return 0;
     }
 
-    if (client->nbdflags & NBD_FLAG_SEND_FUA) {
-        request.type |= NBD_CMD_FLAG_FUA;
-    }
-
     request.from = 0;
     request.len = 0;
 
@@ -348,14 +362,15 @@ int nbd_client_co_discard(BlockDriverState *bs, int64_t sector_num,
 void nbd_client_detach_aio_context(BlockDriverState *bs)
 {
     aio_set_fd_handler(bdrv_get_aio_context(bs),
-                       nbd_get_client_session(bs)->sock, NULL, NULL, NULL);
+                       nbd_get_client_session(bs)->sioc->fd,
+                       false, NULL, NULL, NULL);
 }
 
 void nbd_client_attach_aio_context(BlockDriverState *bs,
                                    AioContext *new_context)
 {
-    aio_set_fd_handler(new_context, nbd_get_client_session(bs)->sock,
-                       nbd_reply_ready, NULL, bs);
+    aio_set_fd_handler(new_context, nbd_get_client_session(bs)->sioc->fd,
+                       false, nbd_reply_ready, NULL, bs);
 }
 
 void nbd_client_close(BlockDriverState *bs)
@@ -367,16 +382,20 @@ void nbd_client_close(BlockDriverState *bs)
         .len = 0
     };
 
-    if (client->sock == -1) {
+    if (client->ioc == NULL) {
         return;
     }
 
-    nbd_send_request(client->sock, &request);
+    nbd_send_request(client->ioc, &request);
 
     nbd_teardown_connection(bs);
 }
 
-int nbd_client_init(BlockDriverState *bs, int sock, const char *export,
+int nbd_client_init(BlockDriverState *bs,
+                    QIOChannelSocket *sioc,
+                    const char *export,
+                    QCryptoTLSCreds *tlscreds,
+                    const char *hostname,
                     Error **errp)
 {
     NbdClientSession *client = nbd_get_client_session(bs);
@@ -384,22 +403,32 @@ int nbd_client_init(BlockDriverState *bs, int sock, const char *export,
 
     /* NBD handshake */
     logout("session init %s\n", export);
-    qemu_set_block(sock);
-    ret = nbd_receive_negotiate(sock, export,
-                                &client->nbdflags, &client->size, errp);
+    qio_channel_set_blocking(QIO_CHANNEL(sioc), true, NULL);
+
+    ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), export,
+                                &client->nbdflags,
+                                tlscreds, hostname,
+                                &client->ioc,
+                                &client->size, errp);
     if (ret < 0) {
         logout("Failed to negotiate with the NBD server\n");
-        closesocket(sock);
         return ret;
     }
 
     qemu_co_mutex_init(&client->send_mutex);
     qemu_co_mutex_init(&client->free_sema);
-    client->sock = sock;
+    client->sioc = sioc;
+    object_ref(OBJECT(client->sioc));
+
+    if (!client->ioc) {
+        client->ioc = QIO_CHANNEL(sioc);
+        object_ref(OBJECT(client->ioc));
+    }
 
     /* Now that we're connected, set the socket to be non-blocking and
      * kick the reply mechanism.  */
-    qemu_set_nonblock(sock);
+    qio_channel_set_blocking(QIO_CHANNEL(sioc), false, NULL);
+
     nbd_client_attach_aio_context(bs, bdrv_get_aio_context(bs));
 
     logout("Established connection with NBD server\n");