D30506.diff
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	diff --git a/usr.sbin/bhyve/pci_virtio_block.c b/usr.sbin/bhyve/pci_virtio_block.c
	--- a/usr.sbin/bhyve/pci_virtio_block.c
	+++ b/usr.sbin/bhyve/pci_virtio_block.c
	@@ -3,7 +3,7 @@
	*
	* Copyright (c) 2011 NetApp, Inc.
	* All rights reserved.
	- * Copyright 2020 Joyent, Inc.
	+ * Copyright 2020-2021 Joyent, Inc.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	@@ -436,6 +436,18 @@
	pci_vtblk_proc(sc, vq);
	}

	+static void
	+pci_vtblk_resized(struct blockif_ctxt bctxt, void arg, size_t new_size)
	+{
	+ struct pci_vtblk_softc *sc;
	+
	+ sc = arg;
	+
	+ sc->vbsc_cfg.vbc_capacity = new_size / VTBLK_BSIZE; /* 512-byte units */
	+ vi_interrupt(&sc->vbsc_vs, VIRTIO_PCI_ISR_CONFIG,
	+ sc->vbsc_vs.vs_msix_cfg_idx);
	+}
	+
	static int
	pci_vtblk_init(struct vmctx ctx, struct pci_devinst pi, nvlist_t *nvl)
	{
	@@ -541,6 +553,7 @@
	return (1);
	}
	vi_set_io_bar(&sc->vbsc_vs, 0);
	+ blockif_register_resize_callback(sc->bc, pci_vtblk_resized, sc);
	return (0);
	}