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hyperv/vmbus: Add sysctl to expose vmbus version.

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Requested by:	Hongxiong Xian <v-hoxian microsoft com>
MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D6860
This commit is contained in:
Sepherosa Ziehau 2016-07-11 06:55:02 +00:00
parent f2e1e9bd53
commit 47a3ee5c60
1 changed files with 21 additions and 0 deletions
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21
sys/dev/hyperv/vmbus/vmbus.c
View file

@ -100,6 +100,8 @@ static int vmbus_init_contact(struct vmbus_softc *,
uint32_t);
static int vmbus_req_channels(struct vmbus_softc *sc);
static int vmbus_sysctl_version(SYSCTL_HANDLER_ARGS);
static struct vmbus_msghc_ctx *vmbus_msghc_ctx_create(bus_dma_tag_t);
static void vmbus_msghc_ctx_destroy(
struct vmbus_msghc_ctx *);
@ -947,6 +949,17 @@ hv_vmbus_child_device_unregister(struct hv_device *child_dev)
return(ret);
}
static int
vmbus_sysctl_version(SYSCTL_HANDLER_ARGS)
{
char verstr[16];
snprintf(verstr, sizeof(verstr), "%u.%u",
hv_vmbus_protocal_version >> 16,
hv_vmbus_protocal_version & 0xffff);
return sysctl_handle_string(oidp, verstr, sizeof(verstr), req);
}
static int
vmbus_probe(device_t dev)
{
@ -977,6 +990,8 @@ vmbus_probe(device_t dev)
static int
vmbus_doattach(struct vmbus_softc *sc)
{
struct sysctl_oid_list *child;
struct sysctl_ctx_list *ctx;
int ret;
if (sc->vmbus_flags & VMBUS_FLAG_ATTACHED)
@ -1040,6 +1055,12 @@ vmbus_doattach(struct vmbus_softc *sc)
bus_generic_attach(sc->vmbus_dev);
device_printf(sc->vmbus_dev, "device scan, probe and attach done\n");
ctx = device_get_sysctl_ctx(sc->vmbus_dev);
child = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->vmbus_dev));
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "version",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
vmbus_sysctl_version, "A", "vmbus version");
return (ret);
cleanup: