Author: sephe Date: Thu Aug 25 05:11:04 2016 New Revision: 304786 URL: https://svnweb.freebsd.org/changeset/base/304786
Log: hyperv/ic: Cleanup heartbeat channel callback. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7626 Modified: head/sys/dev/hyperv/utilities/hv_heartbeat.c head/sys/dev/hyperv/utilities/vmbus_icreg.h Modified: head/sys/dev/hyperv/utilities/hv_heartbeat.c ============================================================================== --- head/sys/dev/hyperv/utilities/hv_heartbeat.c Thu Aug 25 05:00:41 2016 (r304785) +++ head/sys/dev/hyperv/utilities/hv_heartbeat.c Thu Aug 25 05:11:04 2016 (r304786) @@ -22,23 +22,22 @@ * 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. - * - * $FreeBSD$ */ +#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/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_heartbeat_descs[] = { @@ -51,55 +50,64 @@ static const struct vmbus_ic_desc vmbus_ VMBUS_IC_DESC_END }; -/** - * Process heartbeat message - */ static void -hv_heartbeat_cb(struct vmbus_channel *channel, void *context) +vmbus_heartbeat_cb(struct vmbus_channel *chan, void *xsc) { - uint8_t* buf; - int recvlen; - uint64_t requestid; - int ret; - - struct hv_vmbus_heartbeat_msg_data* heartbeat_msg; - struct hv_vmbus_icmsg_hdr* icmsghdrp; - hv_util_sc *softc; - - softc = (hv_util_sc*)context; - buf = softc->receive_buffer; - - recvlen = softc->ic_buflen; - ret = vmbus_chan_recv(channel, buf, &recvlen, &requestid); - KASSERT(ret != ENOBUFS, ("hvheartbeat recvbuf is not large enough")); - /* XXX check recvlen to make sure that it contains enough data */ - - if ((ret == 0) && recvlen > 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; + int dlen, error; + 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(struct vmbus_icmsg_hdr)) { + device_printf(sc->ic_dev, "invalid data len %d\n", dlen); + return; + } + hdr = data; - error = vmbus_ic_negomsg(softc, buf, recvlen); + /* + * 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 { - heartbeat_msg = - (struct hv_vmbus_heartbeat_msg_data *) - &buf[sizeof(struct hv_vmbus_pipe_hdr) + - sizeof(struct hv_vmbus_icmsg_hdr)]; - - heartbeat_msg->seq_num += 1; - } + break; - icmsghdrp->icflags = HV_ICMSGHDRFLAG_TRANSACTION | - HV_ICMSGHDRFLAG_RESPONSE; - - vmbus_chan_send(channel, VMBUS_CHANPKT_TYPE_INBAND, 0, - buf, recvlen, requestid); + case VMBUS_ICMSG_TYPE_HEARTBEAT: + /* Only ic_seq is a must */ + if (dlen < VMBUS_ICMSG_HEARTBEAT_SIZE_MIN) { + device_printf(sc->ic_dev, "invalid heartbeat len %d\n", + dlen); + return; + } + ((struct vmbus_icmsg_heartbeat *)data)->ic_seq++; + break; + + default: + device_printf(sc->ic_dev, "got 0x%08x icmsg\n", hdr->ic_type); + break; } + + /* + * 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); } static int @@ -112,7 +120,8 @@ hv_heartbeat_probe(device_t dev) static int hv_heartbeat_attach(device_t dev) { - return hv_util_attach(dev, hv_heartbeat_cb); + + return (hv_util_attach(dev, vmbus_heartbeat_cb)); } static device_method_t heartbeat_methods[] = { Modified: head/sys/dev/hyperv/utilities/vmbus_icreg.h ============================================================================== --- head/sys/dev/hyperv/utilities/vmbus_icreg.h Thu Aug 25 05:00:41 2016 (r304785) +++ head/sys/dev/hyperv/utilities/vmbus_icreg.h Thu Aug 25 05:11:04 2016 (r304786) @@ -81,4 +81,14 @@ struct vmbus_icmsg_negotiate { uint32_t ic_ver[]; } __packed; +/* VMBUS_ICMSG_TYPE_HEARTBEAT */ +struct vmbus_icmsg_heartbeat { + struct vmbus_icmsg_hdr ic_hdr; + uint64_t ic_seq; + uint32_t ic_rsvd[8]; +} __packed; + +#define VMBUS_ICMSG_HEARTBEAT_SIZE_MIN \ + __offsetof(struct vmbus_icmsg_heartbeat, ic_rsvd[0]) + #endif /* !_VMBUS_ICREG_H_ */ _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
