Author: sephe Date: Fri Sep 2 06:15:30 2016 New Revision: 305280 URL: https://svnweb.freebsd.org/changeset/base/305280
Log: hyperv/ic: Cleanup shutdown channel callback. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7744 Modified: head/sys/dev/hyperv/utilities/hv_shutdown.c head/sys/dev/hyperv/utilities/vmbus_icreg.h Modified: head/sys/dev/hyperv/utilities/hv_shutdown.c ============================================================================== --- head/sys/dev/hyperv/utilities/hv_shutdown.c Fri Sep 2 06:08:08 2016 (r305279) +++ head/sys/dev/hyperv/utilities/hv_shutdown.c Fri Sep 2 06:15:30 2016 (r305280) @@ -22,28 +22,23 @@ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * $FreeBSD$ */ -/* - * A common driver for all hyper-V util services. - */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); #include <sys/param.h> -#include <sys/kernel.h> #include <sys/bus.h> -#include <sys/malloc.h> +#include <sys/kernel.h> #include <sys/module.h> #include <sys/reboot.h> -#include <sys/timetc.h> -#include <sys/syscallsubr.h> #include <sys/systm.h> #include <dev/hyperv/include/hyperv.h> #include <dev/hyperv/include/vmbus.h> -#include <dev/hyperv/utilities/hv_utilreg.h> -#include "hv_util.h" +#include <dev/hyperv/utilities/hv_util.h> +#include <dev/hyperv/utilities/vmbus_icreg.h> + #include "vmbus_if.h" static const struct vmbus_ic_desc vmbus_shutdown_descs[] = { @@ -56,73 +51,78 @@ static const struct vmbus_ic_desc vmbus_ VMBUS_IC_DESC_END }; -/** - * Shutdown - */ static void -hv_shutdown_cb(struct vmbus_channel *channel, void *context) +vmbus_shutdown_cb(struct vmbus_channel *chan, void *xsc) { - uint8_t* buf; - uint8_t execute_shutdown = 0; - hv_vmbus_icmsg_hdr* icmsghdrp; - uint32_t recv_len; - uint64_t request_id; - int ret; - hv_vmbus_shutdown_msg_data* shutdown_msg; - hv_util_sc *softc; - - softc = (hv_util_sc*)context; - buf = softc->receive_buffer; - - recv_len = softc->ic_buflen; - ret = vmbus_chan_recv(channel, buf, &recv_len, &request_id); - KASSERT(ret != ENOBUFS, ("hvshutdown recvbuf is not large enough")); - /* XXX check recv_len to make sure that it contains enough data */ - - if ((ret == 0) && recv_len > 0) { - - icmsghdrp = (struct hv_vmbus_icmsg_hdr *) - &buf[sizeof(struct hv_vmbus_pipe_hdr)]; - - if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) { - int error; + struct hv_util_sc *sc = xsc; + struct vmbus_icmsg_hdr *hdr; + struct vmbus_icmsg_shutdown *msg; + int dlen, error, do_shutdown = 0; + uint64_t xactid; + void *data; + + /* + * Receive request. + */ + data = sc->receive_buffer; + dlen = sc->ic_buflen; + error = vmbus_chan_recv(chan, data, &dlen, &xactid); + KASSERT(error != ENOBUFS, ("icbuf is not large enough")); + if (error) + return; + + if (dlen < sizeof(*hdr)) { + device_printf(sc->ic_dev, "invalid data len %d\n", dlen); + return; + } + hdr = data; - error = vmbus_ic_negomsg(softc, buf, &recv_len); + /* + * Update request, which will be echoed back as response. + */ + switch (hdr->ic_type) { + case VMBUS_ICMSG_TYPE_NEGOTIATE: + error = vmbus_ic_negomsg(sc, data, &dlen); if (error) return; - } else { - shutdown_msg = - (struct hv_vmbus_shutdown_msg_data *) - &buf[sizeof(struct hv_vmbus_pipe_hdr) + - sizeof(struct hv_vmbus_icmsg_hdr)]; - - switch (shutdown_msg->flags) { - case 0: - case 1: - icmsghdrp->status = HV_S_OK; - execute_shutdown = 1; - if(bootverbose) - printf("Shutdown request received -" - " graceful shutdown initiated\n"); - break; - default: - icmsghdrp->status = HV_E_FAIL; - execute_shutdown = 0; - printf("Shutdown request received -" - " Invalid request\n"); - break; - } - } + break; - icmsghdrp->icflags = HV_ICMSGHDRFLAG_TRANSACTION | - HV_ICMSGHDRFLAG_RESPONSE; + case VMBUS_ICMSG_TYPE_SHUTDOWN: + if (dlen < VMBUS_ICMSG_SHUTDOWN_SIZE_MIN) { + device_printf(sc->ic_dev, "invalid shutdown len %d\n", + dlen); + return; + } + msg = data; - vmbus_chan_send(channel, VMBUS_CHANPKT_TYPE_INBAND, 0, - buf, recv_len, request_id); + /* XXX ic_flags definition? */ + if (msg->ic_haltflags == 0 || msg->ic_haltflags == 1) { + device_printf(sc->ic_dev, "shutdown requested\n"); + hdr->ic_status = VMBUS_ICMSG_STATUS_OK; + do_shutdown = 1; + } else { + device_printf(sc->ic_dev, "unknown shutdown flags " + "0x%08x\n", msg->ic_haltflags); + hdr->ic_status = VMBUS_ICMSG_STATUS_FAIL; + } + break; + + default: + device_printf(sc->ic_dev, "got 0x%08x icmsg\n", hdr->ic_type); + break; } - if (execute_shutdown) - shutdown_nice(RB_POWEROFF); + /* + * Send response by echoing the updated request back. + */ + hdr->ic_flags = VMBUS_ICMSG_FLAG_XACT | VMBUS_ICMSG_FLAG_RESP; + error = vmbus_chan_send(chan, VMBUS_CHANPKT_TYPE_INBAND, 0, + data, dlen, xactid); + if (error) + device_printf(sc->ic_dev, "resp send failed: %d\n", error); + + if (do_shutdown) + shutdown_nice(RB_POWEROFF); } static int @@ -135,7 +135,8 @@ hv_shutdown_probe(device_t dev) static int hv_shutdown_attach(device_t dev) { - return hv_util_attach(dev, hv_shutdown_cb); + + return (hv_util_attach(dev, vmbus_shutdown_cb)); } static device_method_t shutdown_methods[] = { Modified: head/sys/dev/hyperv/utilities/vmbus_icreg.h ============================================================================== --- head/sys/dev/hyperv/utilities/vmbus_icreg.h Fri Sep 2 06:08:08 2016 (r305279) +++ head/sys/dev/hyperv/utilities/vmbus_icreg.h Fri Sep 2 06:15:30 2016 (r305280) @@ -91,4 +91,15 @@ struct vmbus_icmsg_heartbeat { #define VMBUS_ICMSG_HEARTBEAT_SIZE_MIN \ __offsetof(struct vmbus_icmsg_heartbeat, ic_rsvd[0]) +struct vmbus_icmsg_shutdown { + struct vmbus_icmsg_hdr ic_hdr; + uint32_t ic_code; + uint32_t ic_timeo; + uint32_t ic_haltflags; + uint8_t ic_msg[2048]; +} __packed; + +#define VMBUS_ICMSG_SHUTDOWN_SIZE_MIN \ + __offsetof(struct vmbus_icmsg_shutdown, ic_msg[0]) + #endif /* !_VMBUS_ICREG_H_ */ _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
