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Implement the FLUSH operation in the virtio-block emulation.

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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
This commit is contained in:
Neel Natu 2014-10-07 17:08:53 +00:00
parent c3d1d2e104
commit 8ccb28efcd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=272710
1 changed files with 6 additions and 0 deletions
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6
usr.sbin/bhyve/pci_virtio_block.c
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@ -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 *sc, struct vqueue_info *vq)
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;