Author: sephe
Date: Fri Nov 11 03:43:06 2016
New Revision: 308499
URL: https://svnweb.freebsd.org/changeset/base/308499
Log:
MFC 307845
hyperv/ic: Rework framework/message version negotiation.
Submitted by: Hongjiang Zhang <honzhan microsoft com>
Modified by: sephe
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8280
Modified:
stable/10/sys/dev/hyperv/utilities/hv_heartbeat.c
stable/10/sys/dev/hyperv/utilities/hv_kvp.c
stable/10/sys/dev/hyperv/utilities/hv_kvp.h
stable/10/sys/dev/hyperv/utilities/hv_shutdown.c
stable/10/sys/dev/hyperv/utilities/hv_timesync.c
stable/10/sys/dev/hyperv/utilities/hv_util.c
stable/10/sys/dev/hyperv/utilities/hv_util.h
stable/10/sys/dev/hyperv/utilities/hv_utilreg.h
stable/10/sys/dev/hyperv/utilities/vmbus_icreg.h
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/dev/hyperv/utilities/hv_heartbeat.c
==============================================================================
--- stable/10/sys/dev/hyperv/utilities/hv_heartbeat.c Fri Nov 11 03:41:36
2016 (r308498)
+++ stable/10/sys/dev/hyperv/utilities/hv_heartbeat.c Fri Nov 11 03:43:06
2016 (r308499)
@@ -40,6 +40,14 @@ __FBSDID("$FreeBSD$");
#include "vmbus_if.h"
+#define VMBUS_HEARTBEAT_FWVER_MAJOR 3
+#define VMBUS_HEARTBEAT_FWVER \
+ VMBUS_IC_VERSION(VMBUS_HEARTBEAT_FWVER_MAJOR, 0)
+
+#define VMBUS_HEARTBEAT_MSGVER_MAJOR 3
+#define VMBUS_HEARTBEAT_MSGVER \
+ VMBUS_IC_VERSION(VMBUS_HEARTBEAT_MSGVER_MAJOR, 0)
+
static const struct vmbus_ic_desc vmbus_heartbeat_descs[] = {
{
.ic_guid = { .hv_guid = {
@@ -80,7 +88,8 @@ vmbus_heartbeat_cb(struct vmbus_channel
*/
switch (hdr->ic_type) {
case VMBUS_ICMSG_TYPE_NEGOTIATE:
- error = vmbus_ic_negomsg(sc, data, &dlen);
+ error = vmbus_ic_negomsg(sc, data, &dlen,
+ VMBUS_HEARTBEAT_FWVER, VMBUS_HEARTBEAT_MSGVER);
if (error)
return;
break;
Modified: stable/10/sys/dev/hyperv/utilities/hv_kvp.c
==============================================================================
--- stable/10/sys/dev/hyperv/utilities/hv_kvp.c Fri Nov 11 03:41:36 2016
(r308498)
+++ stable/10/sys/dev/hyperv/utilities/hv_kvp.c Fri Nov 11 03:43:06 2016
(r308499)
@@ -61,7 +61,9 @@ __FBSDID("$FreeBSD$");
#include <sys/mutex.h>
#include <dev/hyperv/include/hyperv.h>
+#include <dev/hyperv/include/vmbus.h>
#include <dev/hyperv/utilities/hv_utilreg.h>
+#include <dev/hyperv/utilities/vmbus_icreg.h>
#include "hv_util.h"
#include "unicode.h"
@@ -74,6 +76,12 @@ __FBSDID("$FreeBSD$");
#define KVP_ERROR 1
#define kvp_hdr hdr.kvp_hdr
+#define KVP_FWVER_MAJOR 3
+#define KVP_FWVER VMBUS_IC_VERSION(KVP_FWVER_MAJOR, 0)
+
+#define KVP_MSGVER_MAJOR 4
+#define KVP_MSGVER VMBUS_IC_VERSION(KVP_MSGVER_MAJOR, 0)
+
/* hv_kvp debug control */
static int hv_kvp_log = 0;
@@ -208,52 +216,10 @@ hv_kvp_transaction_init(hv_kvp_sc *sc, u
sc->host_msg_id = request_id;
sc->rcv_buf = rcv_buf;
sc->host_kvp_msg = (struct hv_kvp_msg *)&rcv_buf[
- sizeof(struct hv_vmbus_pipe_hdr) +
- sizeof(struct hv_vmbus_icmsg_hdr)];
+ sizeof(struct hv_vmbus_pipe_hdr) +
+ sizeof(struct hv_vmbus_icmsg_hdr)];
}
-
-/*
- * hv_kvp - version neogtiation function
- */
-static void
-hv_kvp_negotiate_version(struct hv_vmbus_icmsg_hdr *icmsghdrp, uint8_t *buf)
-{
- struct hv_vmbus_icmsg_negotiate *negop;
- int icframe_vercnt;
- int icmsg_vercnt;
-
- icmsghdrp->icmsgsize = 0x10;
-
- negop = (struct hv_vmbus_icmsg_negotiate *)&buf[
- sizeof(struct hv_vmbus_pipe_hdr) +
- sizeof(struct hv_vmbus_icmsg_hdr)];
- icframe_vercnt = negop->icframe_vercnt;
- icmsg_vercnt = negop->icmsg_vercnt;
-
- /*
- * Select the framework version number we will support
- */
- if ((icframe_vercnt >= 2) && (negop->icversion_data[1].major == 3)) {
- icframe_vercnt = 3;
- if (icmsg_vercnt > 2)
- icmsg_vercnt = 4;
- else
- icmsg_vercnt = 3;
- } else {
- icframe_vercnt = 1;
- icmsg_vercnt = 1;
- }
-
- negop->icframe_vercnt = 1;
- negop->icmsg_vercnt = 1;
- negop->icversion_data[0].major = icframe_vercnt;
- negop->icversion_data[0].minor = 0;
- negop->icversion_data[1].major = icmsg_vercnt;
- negop->icversion_data[1].minor = 0;
-}
-
-
/*
* Convert ip related info in umsg from utf8 to utf16 and store in hmsg
*/
@@ -578,7 +544,8 @@ hv_kvp_respond_host(hv_kvp_sc *sc, int e
error = HV_KVP_E_FAIL;
hv_icmsg_hdrp->status = error;
- hv_icmsg_hdrp->icflags = HV_ICMSGHDRFLAG_TRANSACTION |
HV_ICMSGHDRFLAG_RESPONSE;
+ hv_icmsg_hdrp->icflags = HV_ICMSGHDRFLAG_TRANSACTION |
+ HV_ICMSGHDRFLAG_RESPONSE;
error = vmbus_chan_send(vmbus_get_channel(sc->dev),
VMBUS_CHANPKT_TYPE_INBAND, 0, sc->rcv_buf, sc->host_msg_len,
@@ -622,8 +589,8 @@ hv_kvp_process_request(void *context, in
uint32_t recvlen = 0;
uint64_t requestid;
struct hv_vmbus_icmsg_hdr *icmsghdrp;
- int ret = 0;
- hv_kvp_sc *sc;
+ int ret = 0, error;
+ hv_kvp_sc *sc;
hv_kvp_log_info("%s: entering hv_kvp_process_request\n", __func__);
@@ -637,14 +604,15 @@ hv_kvp_process_request(void *context, in
/* XXX check recvlen to make sure that it contains enough data */
while ((ret == 0) && (recvlen > 0)) {
-
icmsghdrp = (struct hv_vmbus_icmsg_hdr *)
- &kvp_buf[sizeof(struct hv_vmbus_pipe_hdr)];
+ &kvp_buf[sizeof(struct hv_vmbus_pipe_hdr)];
hv_kvp_transaction_init(sc, recvlen, requestid, kvp_buf);
if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) {
- hv_kvp_negotiate_version(icmsghdrp, kvp_buf);
- hv_kvp_respond_host(sc, ret);
+ error = vmbus_ic_negomsg(&sc->util_sc,
+ kvp_buf, &recvlen, KVP_FWVER, KVP_MSGVER);
+ /* XXX handle vmbus_ic_negomsg failure. */
+ hv_kvp_respond_host(sc, error);
/*
* It is ok to not acquire the mutex before setting
Modified: stable/10/sys/dev/hyperv/utilities/hv_kvp.h
==============================================================================
--- stable/10/sys/dev/hyperv/utilities/hv_kvp.h Fri Nov 11 03:41:36 2016
(r308498)
+++ stable/10/sys/dev/hyperv/utilities/hv_kvp.h Fri Nov 11 03:43:06 2016
(r308499)
@@ -28,7 +28,6 @@
#ifndef _KVP_H
#define _KVP_H
-
/*
* An implementation of HyperV key value pair (KVP) functionality for FreeBSD
*
@@ -178,9 +177,9 @@ struct hv_kvp_ipaddr_value {
}__attribute__((packed));
struct hv_kvp_hdr {
- uint8_t operation;
- uint8_t pool;
- uint16_t pad;
+ uint8_t operation;
+ uint8_t pool;
+ uint16_t pad;
} __attribute__((packed));
struct hv_kvp_exchg_msg_value {
Modified: stable/10/sys/dev/hyperv/utilities/hv_shutdown.c
==============================================================================
--- stable/10/sys/dev/hyperv/utilities/hv_shutdown.c Fri Nov 11 03:41:36
2016 (r308498)
+++ stable/10/sys/dev/hyperv/utilities/hv_shutdown.c Fri Nov 11 03:43:06
2016 (r308499)
@@ -41,6 +41,14 @@ __FBSDID("$FreeBSD$");
#include "vmbus_if.h"
+#define VMBUS_SHUTDOWN_FWVER_MAJOR 3
+#define VMBUS_SHUTDOWN_FWVER \
+ VMBUS_IC_VERSION(VMBUS_SHUTDOWN_FWVER_MAJOR, 0)
+
+#define VMBUS_SHUTDOWN_MSGVER_MAJOR 3
+#define VMBUS_SHUTDOWN_MSGVER \
+ VMBUS_IC_VERSION(VMBUS_SHUTDOWN_MSGVER_MAJOR, 0)
+
static const struct vmbus_ic_desc vmbus_shutdown_descs[] = {
{
.ic_guid = { .hv_guid = {
@@ -82,7 +90,8 @@ vmbus_shutdown_cb(struct vmbus_channel *
*/
switch (hdr->ic_type) {
case VMBUS_ICMSG_TYPE_NEGOTIATE:
- error = vmbus_ic_negomsg(sc, data, &dlen);
+ error = vmbus_ic_negomsg(sc, data, &dlen,
+ VMBUS_SHUTDOWN_FWVER, VMBUS_SHUTDOWN_MSGVER);
if (error)
return;
break;
Modified: stable/10/sys/dev/hyperv/utilities/hv_timesync.c
==============================================================================
--- stable/10/sys/dev/hyperv/utilities/hv_timesync.c Fri Nov 11 03:41:36
2016 (r308498)
+++ stable/10/sys/dev/hyperv/utilities/hv_timesync.c Fri Nov 11 03:43:06
2016 (r308499)
@@ -42,6 +42,14 @@ __FBSDID("$FreeBSD$");
#include "vmbus_if.h"
+#define VMBUS_TIMESYNC_FWVER_MAJOR 3
+#define VMBUS_TIMESYNC_FWVER \
+ VMBUS_IC_VERSION(VMBUS_TIMESYNC_FWVER_MAJOR, 0)
+
+#define VMBUS_TIMESYNC_MSGVER_MAJOR 3
+#define VMBUS_TIMESYNC_MSGVER \
+ VMBUS_IC_VERSION(VMBUS_TIMESYNC_MSGVER_MAJOR, 0)
+
static const struct vmbus_ic_desc vmbus_timesync_descs[] = {
{
.ic_guid = { .hv_guid = {
@@ -162,7 +170,8 @@ vmbus_timesync_cb(struct vmbus_channel *
*/
switch (hdr->ic_type) {
case VMBUS_ICMSG_TYPE_NEGOTIATE:
- error = vmbus_ic_negomsg(sc, data, &dlen);
+ error = vmbus_ic_negomsg(sc, data, &dlen,
+ VMBUS_TIMESYNC_FWVER, VMBUS_TIMESYNC_MSGVER);
if (error)
return;
break;
Modified: stable/10/sys/dev/hyperv/utilities/hv_util.c
==============================================================================
--- stable/10/sys/dev/hyperv/utilities/hv_util.c Fri Nov 11 03:41:36
2016 (r308498)
+++ stable/10/sys/dev/hyperv/utilities/hv_util.c Fri Nov 11 03:43:06
2016 (r308499)
@@ -37,6 +37,7 @@
#include <sys/module.h>
#include <sys/reboot.h>
#include <sys/systm.h>
+#include <sys/sysctl.h>
#include <sys/timetc.h>
#include <dev/hyperv/include/hyperv.h>
@@ -53,52 +54,145 @@
__offsetof(struct vmbus_icmsg_negotiate, ic_ver[VMBUS_IC_VERCNT])
CTASSERT(VMBUS_IC_NEGOSZ < VMBUS_IC_BRSIZE);
+static int vmbus_ic_fwver_sysctl(SYSCTL_HANDLER_ARGS);
+static int vmbus_ic_msgver_sysctl(SYSCTL_HANDLER_ARGS);
+
int
-vmbus_ic_negomsg(struct hv_util_sc *sc, void *data, int *dlen0)
+vmbus_ic_negomsg(struct hv_util_sc *sc, void *data, int *dlen0,
+ uint32_t fw_ver, uint32_t msg_ver)
{
struct vmbus_icmsg_negotiate *nego;
- int cnt, major, dlen = *dlen0;
+ int i, cnt, dlen = *dlen0, error;
+ uint32_t sel_fw_ver, sel_msg_ver;
+ bool has_fw_ver, has_msg_ver;
/*
- * Preliminary message size verification
+ * Preliminary message verification.
*/
if (dlen < sizeof(*nego)) {
device_printf(sc->ic_dev, "truncated ic negotiate, len %d\n",
dlen);
- return EINVAL;
+ return (EINVAL);
}
nego = data;
+ if (nego->ic_fwver_cnt == 0) {
+ device_printf(sc->ic_dev, "ic negotiate does not contain "
+ "framework version %u\n", nego->ic_fwver_cnt);
+ return (EINVAL);
+ }
+ if (nego->ic_msgver_cnt == 0) {
+ device_printf(sc->ic_dev, "ic negotiate does not contain "
+ "message version %u\n", nego->ic_msgver_cnt);
+ return (EINVAL);
+ }
+
cnt = nego->ic_fwver_cnt + nego->ic_msgver_cnt;
if (dlen < __offsetof(struct vmbus_icmsg_negotiate, ic_ver[cnt])) {
device_printf(sc->ic_dev, "ic negotiate does not contain "
"versions %d\n", dlen);
- return EINVAL;
+ return (EINVAL);
+ }
+
+ error = EOPNOTSUPP;
+
+ /*
+ * Find the best match framework version.
+ */
+ has_fw_ver = false;
+ for (i = 0; i < nego->ic_fwver_cnt; ++i) {
+ if (VMBUS_ICVER_LE(nego->ic_ver[i], fw_ver)) {
+ if (!has_fw_ver) {
+ sel_fw_ver = nego->ic_ver[i];
+ has_fw_ver = true;
+ } else if (VMBUS_ICVER_GT(nego->ic_ver[i],
+ sel_fw_ver)) {
+ sel_fw_ver = nego->ic_ver[i];
+ }
+ }
+ }
+ if (!has_fw_ver) {
+ device_printf(sc->ic_dev, "failed to select framework "
+ "version\n");
+ goto done;
+ }
+
+ /*
+ * Fine the best match message version.
+ */
+ has_msg_ver = false;
+ for (i = nego->ic_fwver_cnt;
+ i < nego->ic_fwver_cnt + nego->ic_msgver_cnt; ++i) {
+ if (VMBUS_ICVER_LE(nego->ic_ver[i], msg_ver)) {
+ if (!has_msg_ver) {
+ sel_msg_ver = nego->ic_ver[i];
+ has_msg_ver = true;
+ } else if (VMBUS_ICVER_GT(nego->ic_ver[i],
+ sel_msg_ver)) {
+ sel_msg_ver = nego->ic_ver[i];
+ }
+ }
+ }
+ if (!has_msg_ver) {
+ device_printf(sc->ic_dev, "failed to select message "
+ "version\n");
+ goto done;
}
- /* Select major version; XXX looks wrong. */
- if (nego->ic_fwver_cnt >= 2 && VMBUS_ICVER_MAJOR(nego->ic_ver[1]) == 3)
- major = 3;
- else
- major = 1;
+ error = 0;
+done:
+ if (bootverbose || !has_fw_ver || !has_msg_ver) {
+ if (has_fw_ver) {
+ device_printf(sc->ic_dev, "sel framework version: "
+ "%u.%u\n",
+ VMBUS_ICVER_MAJOR(sel_fw_ver),
+ VMBUS_ICVER_MINOR(sel_fw_ver));
+ }
+ for (i = 0; i < nego->ic_fwver_cnt; i++) {
+ device_printf(sc->ic_dev, "supp framework version: "
+ "%u.%u\n",
+ VMBUS_ICVER_MAJOR(nego->ic_ver[i]),
+ VMBUS_ICVER_MINOR(nego->ic_ver[i]));
+ }
+
+ if (has_msg_ver) {
+ device_printf(sc->ic_dev, "sel message version: "
+ "%u.%u\n",
+ VMBUS_ICVER_MAJOR(sel_msg_ver),
+ VMBUS_ICVER_MINOR(sel_msg_ver));
+ }
+ for (i = nego->ic_fwver_cnt;
+ i < nego->ic_fwver_cnt + nego->ic_msgver_cnt; i++) {
+ device_printf(sc->ic_dev, "supp message version: "
+ "%u.%u\n",
+ VMBUS_ICVER_MAJOR(nego->ic_ver[i]),
+ VMBUS_ICVER_MINOR(nego->ic_ver[i]));
+ }
+ }
+ if (error)
+ return (error);
+
+ /* Record the selected versions. */
+ sc->ic_fwver = sel_fw_ver;
+ sc->ic_msgver = sel_msg_ver;
- /* One framework version */
+ /* One framework version. */
nego->ic_fwver_cnt = 1;
- nego->ic_ver[0] = VMBUS_IC_VERSION(major, 0);
+ nego->ic_ver[0] = sel_fw_ver;
- /* One message version */
+ /* One message version. */
nego->ic_msgver_cnt = 1;
- nego->ic_ver[1] = VMBUS_IC_VERSION(major, 0);
+ nego->ic_ver[1] = sel_msg_ver;
- /* Update data size */
+ /* Update data size. */
nego->ic_hdr.ic_dsize = VMBUS_IC_NEGOSZ -
sizeof(struct vmbus_icmsg_hdr);
- /* Update total size, if necessary */
+ /* Update total size, if necessary. */
if (dlen < VMBUS_IC_NEGOSZ)
*dlen0 = VMBUS_IC_NEGOSZ;
- return 0;
+ return (0);
}
int
@@ -124,6 +218,8 @@ hv_util_attach(device_t dev, vmbus_chan_
{
struct hv_util_sc *sc = device_get_softc(dev);
struct vmbus_channel *chan = vmbus_get_channel(dev);
+ struct sysctl_oid_list *child;
+ struct sysctl_ctx_list *ctx;
int error;
sc->ic_dev = dev;
@@ -146,9 +242,41 @@ hv_util_attach(device_t dev, vmbus_chan_
free(sc->receive_buffer, M_DEVBUF);
return (error);
}
+
+ ctx = device_get_sysctl_ctx(dev);
+ child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
+ SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "fw_version",
+ CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
+ vmbus_ic_fwver_sysctl, "A", "framework version");
+ SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "msg_version",
+ CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
+ vmbus_ic_msgver_sysctl, "A", "message version");
+
return (0);
}
+static int
+vmbus_ic_fwver_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ struct hv_util_sc *sc = arg1;
+ char verstr[16];
+
+ snprintf(verstr, sizeof(verstr), "%u.%u",
+ VMBUS_ICVER_MAJOR(sc->ic_fwver), VMBUS_ICVER_MINOR(sc->ic_fwver));
+ return sysctl_handle_string(oidp, verstr, sizeof(verstr), req);
+}
+
+static int
+vmbus_ic_msgver_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ struct hv_util_sc *sc = arg1;
+ char verstr[16];
+
+ snprintf(verstr, sizeof(verstr), "%u.%u",
+ VMBUS_ICVER_MAJOR(sc->ic_msgver), VMBUS_ICVER_MINOR(sc->ic_msgver));
+ return sysctl_handle_string(oidp, verstr, sizeof(verstr), req);
+}
+
int
hv_util_detach(device_t dev)
{
Modified: stable/10/sys/dev/hyperv/utilities/hv_util.h
==============================================================================
--- stable/10/sys/dev/hyperv/utilities/hv_util.h Fri Nov 11 03:41:36
2016 (r308498)
+++ stable/10/sys/dev/hyperv/utilities/hv_util.h Fri Nov 11 03:43:06
2016 (r308499)
@@ -42,6 +42,8 @@ typedef struct hv_util_sc {
device_t ic_dev;
uint8_t *receive_buffer;
int ic_buflen;
+ uint32_t ic_fwver; /* framework version */
+ uint32_t ic_msgver; /* message version */
} hv_util_sc;
struct vmbus_ic_desc {
@@ -54,6 +56,7 @@ struct vmbus_ic_desc {
int hv_util_attach(device_t dev, vmbus_chan_callback_t cb);
int hv_util_detach(device_t dev);
int vmbus_ic_probe(device_t dev, const struct vmbus_ic_desc
descs[]);
-int vmbus_ic_negomsg(struct hv_util_sc *, void *data, int *dlen);
+int vmbus_ic_negomsg(struct hv_util_sc *sc, void *data, int *dlen,
+ uint32_t fw_ver, uint32_t msg_ver);
#endif
Modified: stable/10/sys/dev/hyperv/utilities/hv_utilreg.h
==============================================================================
--- stable/10/sys/dev/hyperv/utilities/hv_utilreg.h Fri Nov 11 03:41:36
2016 (r308498)
+++ stable/10/sys/dev/hyperv/utilities/hv_utilreg.h Fri Nov 11 03:43:06
2016 (r308499)
@@ -76,16 +76,4 @@ typedef struct hv_vmbus_icmsg_negotiate
hv_vmbus_ic_version icversion_data[1]; /* any size array */
} __packed hv_vmbus_icmsg_negotiate;
-typedef struct hv_vmbus_shutdown_msg_data {
- uint32_t reason_code;
- uint32_t timeout_seconds;
- uint32_t flags;
- uint8_t display_message[2048];
-} __packed hv_vmbus_shutdown_msg_data;
-
-typedef struct hv_vmbus_heartbeat_msg_data {
- uint64_t seq_num;
- uint32_t reserved[8];
-} __packed hv_vmbus_heartbeat_msg_data;
-
#endif /* !_HV_UTILREG_H_ */
Modified: stable/10/sys/dev/hyperv/utilities/vmbus_icreg.h
==============================================================================
--- stable/10/sys/dev/hyperv/utilities/vmbus_icreg.h Fri Nov 11 03:41:36
2016 (r308498)
+++ stable/10/sys/dev/hyperv/utilities/vmbus_icreg.h Fri Nov 11 03:43:06
2016 (r308499)
@@ -42,6 +42,12 @@
#define VMBUS_IC_VERSION(major, minor) ((major) | (((uint32_t)(minor)) << 16))
#define VMBUS_ICVER_MAJOR(ver) ((ver) & 0xffff)
#define VMBUS_ICVER_MINOR(ver) (((ver) & 0xffff0000) >> 16)
+#define VMBUS_ICVER_SWAP(ver) \
+ ((VMBUS_ICVER_MAJOR((ver)) << 16) | VMBUS_ICVER_MINOR((ver)))
+#define VMBUS_ICVER_LE(v1, v2) \
+ (VMBUS_ICVER_SWAP((v1)) <= VMBUS_ICVER_SWAP((v2)))
+#define VMBUS_ICVER_GT(v1, v2) \
+ (VMBUS_ICVER_SWAP((v1)) > VMBUS_ICVER_SWAP((v2)))
struct vmbus_pipe_hdr {
uint32_t ph_flags;
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