Author: neel
Date: Tue Oct 7 17:08:53 2014
New Revision: 272710
URL: https://svnweb.freebsd.org/changeset/base/272710
Log:
Implement the FLUSH operation in the virtio-block emulation.
This gets rid of the following error message during FreeBSD guest bootup:
"vtbd0: hard error cmd=flush fsbn 0"
Reported by: rodrigc
Reviewed by: grehan
Modified:
head/usr.sbin/bhyve/pci_virtio_block.c
Modified: head/usr.sbin/bhyve/pci_virtio_block.c
==============================================================================
--- head/usr.sbin/bhyve/pci_virtio_block.c Tue Oct 7 16:46:11 2014
(r272709)
+++ head/usr.sbin/bhyve/pci_virtio_block.c Tue Oct 7 17:08:53 2014
(r272710)
@@ -94,6 +94,8 @@ struct vtblk_config {
struct virtio_blk_hdr {
#define VBH_OP_READ 0
#define VBH_OP_WRITE 1
+#define VBH_OP_FLUSH 4
+#define VBH_OP_FLUSH_OUT 5
#define VBH_OP_IDENT 8
#define VBH_FLAG_BARRIER 0x80000000 /* OR'ed into vbh_type
*/
uint32_t vbh_type;
@@ -217,6 +219,10 @@ pci_vtblk_proc(struct pci_vtblk_softc *s
MIN(iov[1].iov_len, sizeof(sc->vbsc_ident)));
err = 0;
break;
+ case VBH_OP_FLUSH:
+ case VBH_OP_FLUSH_OUT:
+ err = fsync(sc->vbsc_fd);
+ break;
default:
err = -ENOSYS;
break;
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