Merge tag 'pull-nbd-2023-05-03' of https://repo.or.cz/qemu/ericb into…

… staging

nbd patches for 2023-05-03

- Eric Blake: clear LISTEN_FDNAMES when consuming systemd sockets
- Stefan Hajnoczi: clear export BlockDeviceOps in central location

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# gpg: Signature made Wed 03 May 2023 08:00:56 PM BST
# gpg:                using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full]
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full]
# gpg:                 aka "[jpeg image of size 6874]" [full]

* tag 'pull-nbd-2023-05-03' of https://repo.or.cz/qemu/ericb:
  block/export: call blk_set_dev_ops(blk, NULL, NULL)
  systemd: Also clear LISTEN_FDNAMES during systemd socket activation

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

block/export/export.c

@@ -192,6 +192,7 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp)
     return exp;
 
 fail:
+    blk_set_dev_ops(exp->blk, NULL, NULL);
     blk_unref(blk);
     aio_context_release(ctx);
     if (exp) {
@@ -219,6 +220,7 @@ static void blk_exp_delete_bh(void *opaque)
     assert(exp->refcount == 0);
     QLIST_REMOVE(exp, next);
     exp->drv->delete(exp);
+    blk_set_dev_ops(exp->blk, NULL, NULL);
     blk_unref(exp->blk);
     qapi_event_send_block_export_deleted(exp->id);
     g_free(exp->id);

block/export/vduse-blk.c

@@ -346,7 +346,6 @@ static void vduse_blk_exp_delete(BlockExport *exp)
 
     blk_remove_aio_context_notifier(exp->blk, blk_aio_attached, blk_aio_detach,
                                     vblk_exp);
-    blk_set_dev_ops(exp->blk, NULL, NULL);
     ret = vduse_dev_destroy(vblk_exp->dev);
     if (ret != -EBUSY) {
         unlink(vblk_exp->recon_file);

util/systemd.c

@@ -51,6 +51,7 @@ unsigned int check_socket_activation(void)
     /* So these are not passed to any child processes we might start. */
     unsetenv("LISTEN_FDS");
     unsetenv("LISTEN_PID");
+    unsetenv("LISTEN_FDNAMES");
 
     /* So the file descriptors don't leak into child processes. */
     for (i = 0; i < nr_fds; ++i) {