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bhyve: Support setting the disk serial number for VirtIO block devices.

Browse Source 
Reviewed by:	allanjude
Obtained from:	illumos
Differential Revision:	https://reviews.freebsd.org/D31983

(cherry picked from commit c6efcb1281)
This commit is contained in:
John Baldwin 2021-09-17 09:55:06 -07:00
parent b07b1f890e
commit 5f6c2bd03b
2 changed files with 28 additions and 11 deletions
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12
usr.sbin/bhyve/bhyve_config.5
View File

@ -23,7 +23,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd April 20, 2021
.Dd September 17, 2021
.Dt BHYVE_CONFIG 5
.Os
.Sh NAME
@ -512,6 +512,16 @@ The path of a directory on the host to export to the guest.
.It Va ro Ta bool Ta false Ta
If true, the guest filesystem is read-only.
.El
.Ss VirtIO Block Device Settings
In addition to the block device settings described above, each
VirtIO block device supports the following settings:
.Bl -column "model" "integer" "generated"
.It Sy Name Ta Sy Format Ta Sy Default Ta Sy Description
.It Va ser Ta string Ta generated Ta
Serial number of up to twenty characters.
A default serial number is generated using a hash of the backing
store's pathname.
.El
.Ss VirtIO Console Device Settings
Each VirtIO Console device contains one or more console ports.
Each port stores its settings in a node named

27
usr.sbin/bhyve/pci_virtio_block.c
View File

@ -453,7 +453,7 @@ pci_vtblk_init(struct vmctx *ctx, struct pci_devinst *pi, nvlist_t *nvl)
{
char bident[sizeof("XX:X:X")];
struct blockif_ctxt *bctxt;
const char *path;
const char *path, *serial;
MD5_CTX mdctx;
u_char digest[16];
struct pci_vtblk_softc *sc;
@ -498,16 +498,23 @@ pci_vtblk_init(struct vmctx *ctx, struct pci_devinst *pi, nvlist_t *nvl)
/* sc->vbsc_vq.vq_notify = we have no per-queue notify */
/*
* Create an identifier for the backing file. Use parts of the
* md5 sum of the filename
* If an explicit identifier is not given, create an
* identifier using parts of the md5 sum of the filename.
*/
path = get_config_value_node(nvl, "path");
MD5Init(&mdctx);
MD5Update(&mdctx, path, strlen(path));
MD5Final(digest, &mdctx);
snprintf(sc->vbsc_ident, VTBLK_BLK_ID_BYTES,
"BHYVE-%02X%02X-%02X%02X-%02X%02X",
digest[0], digest[1], digest[2], digest[3], digest[4], digest[5]);
bzero(sc->vbsc_ident, VTBLK_BLK_ID_BYTES);
if ((serial = get_config_value_node(nvl, "serial")) != NULL ||
(serial = get_config_value_node(nvl, "ser")) != NULL) {
strlcpy(sc->vbsc_ident, serial, VTBLK_BLK_ID_BYTES);
} else {
path = get_config_value_node(nvl, "path");
MD5Init(&mdctx);
MD5Update(&mdctx, path, strlen(path));
MD5Final(digest, &mdctx);
snprintf(sc->vbsc_ident, VTBLK_BLK_ID_BYTES,
"BHYVE-%02X%02X-%02X%02X-%02X%02X",
digest[0], digest[1], digest[2], digest[3], digest[4],
digest[5]);
}
/* setup virtio block config space */
sc->vbsc_cfg.vbc_capacity = size / VTBLK_BSIZE; /* 512-byte units */