HVM-388 Run native kvm with qemu-v0.14.x

2 files changed, 350 insertions, 0 deletions

diff --git a/net/vnic.c b/net/vnic.c
new file mode 100644
index 0000000..c6a7e8f
--- /dev/null
+++ b/net/vnic.c
@@ -0,0 +1,316 @@
+/*
+ * QEMU System Emulator
+ * Solaris VNIC support
+ *
+ * Copyright (c) 2011 Joyent, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <libdlpi.h>
+#include <string.h>
+#include <stdio.h>
+#include <stropts.h>
+#include <unistd.h>
+
+#include <net/if_dl.h>
+#include <sys/ethernet.h>
+#include <sys/dlpi.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "net/vnic.h"
+
+#include "config-host.h"
+#include "qemu-common.h"
+#include "qemu-error.h"
+#include "qemu-option.h"
+#include "qemu-char.h"
+
+/*
+ * XXX We should determine a good way to get this buffer size. 64k feels like
+ * such an arbitrary number...
+ */
+#define	VNIC_BUFFSIZE	65536
+
+typedef struct VNICState {
+	VLANClientState	vns_nc;
+	int		vns_fd;
+	unsigned int	vns_rpoll;
+	unsigned int	vns_wpoll;
+	uint8_t		vns_buf[VNIC_BUFFSIZE];
+	uint_t		vns_sap;
+	dlpi_handle_t	vns_hdl;
+} VNICState;
+
+static void vnic_update_fd_handler(VNICState *);
+
+static void
+vnic_read_poll(VNICState *vsp, int enable)
+{
+	vsp->vns_rpoll = enable;
+	vnic_update_fd_handler(vsp);
+}
+
+static void
+vnic_write_poll(VNICState *vsp, int enable)
+{
+	vsp->vns_wpoll = enable;
+	vnic_update_fd_handler(vsp);
+}
+
+static void
+vnic_poll(VLANClientState *ncp, bool enable)
+{
+	VNICState *vsp = DO_UPCAST(VNICState, vns_nc, ncp);
+	vnic_read_poll(vsp, 1);
+	vnic_write_poll(vsp, 1);
+}
+
+static int
+vnic_read_packet(VNICState *vsp, uint8_t *buf, int len)
+{
+	struct strbuf sbuf;
+	int flags, ret;
+
+	flags = 0;
+	sbuf.maxlen = len;
+	sbuf.buf = (char *)buf;
+
+	do {
+		ret = getmsg(vsp->vns_fd, NULL, &sbuf, &flags);
+	} while (ret == -1 && errno == EINTR);
+
+	if (ret == -1 && errno == EAGAIN) {
+		vnic_write_poll(vsp, 1);
+		return (0);
+	}
+	
+	if (ret == -1) {
+		return (-1);
+	}
+
+	return (sbuf.len);
+}
+
+static int
+vnic_write_packet(VNICState *vsp, const uint8_t *buf, int len)
+{
+	struct strbuf sbuf;
+	int flags, ret;
+
+	flags = 0;
+	sbuf.len = len;
+	sbuf.buf = (char *)buf;
+
+	do {
+		ret = putmsg(vsp->vns_fd, NULL, &sbuf, flags);
+	} while (ret == -1 && errno == EINTR);
+
+	if (ret == -1 && errno == EAGAIN) {
+		vnic_write_poll(vsp, 1);
+		return (0);
+	}
+
+	if (ret == -1)
+		return (-1);
+
+	return (len);
+}
+
+static int
+vnic_can_send(void *opaque)
+{
+	VNICState *vsp = opaque;
+	return (qemu_can_send_packet(&vsp->vns_nc));
+}
+
+static void
+vnic_send_completed(VLANClientState *nc, ssize_t len)
+{
+	VNICState *vsp = DO_UPCAST(VNICState, vns_nc, nc);
+	vnic_read_poll(vsp, 1);
+}
+
+static void
+vnic_send(void *opaque)
+{
+	VNICState *vsp = opaque;
+	int ret;
+
+	do {
+		ret = vnic_read_packet(vsp, vsp->vns_buf,
+		    sizeof (vsp->vns_buf));
+		if (ret <= 0)
+			break;
+
+		ret = qemu_send_packet_async(&vsp->vns_nc, vsp->vns_buf, ret,
+		    vnic_send_completed);
+
+		if (ret == 0)
+			vnic_read_poll(vsp, 0);
+
+	} while (ret > 0 && qemu_can_send_packet(&vsp->vns_nc));
+}
+
+static void
+vnic_writable(void *opaque)
+{
+	VNICState *vsp = opaque;
+	vnic_write_poll(vsp, 0);
+	qemu_flush_queued_packets(&vsp->vns_nc);
+}
+
+static ssize_t
+vnic_receive(VLANClientState *ncp, const uint8_t *buf, size_t size)
+{
+	VNICState *vsp = DO_UPCAST(VNICState, vns_nc, ncp);
+
+	return (vnic_write_packet(vsp, buf, size));
+}
+
+static void
+vnic_cleanup(VLANClientState *ncp)
+{
+	VNICState *vsp;
+
+	vsp = DO_UPCAST(VNICState, vns_nc, ncp);
+
+	qemu_purge_queued_packets(ncp);
+
+	dlpi_close(vsp->vns_hdl);
+}
+
+static void
+vnic_update_fd_handler(VNICState *vsp)
+{
+	qemu_set_fd_handler2(vsp->vns_fd,
+	    vsp->vns_rpoll ? vnic_can_send : NULL,
+	    vsp->vns_rpoll ? vnic_send : NULL,
+	    vsp->vns_wpoll ? vnic_writable : NULL,
+	    vsp);
+}
+
+static NetClientInfo net_vnic_info = {
+	.type = NET_CLIENT_TYPE_VNIC,
+	.size = sizeof (VNICState),
+	.receive = vnic_receive,
+	.poll = vnic_poll,
+	.cleanup = vnic_cleanup
+};
+
+static int
+net_init_kvm(int vfd)
+{
+	int kfd;
+
+	if ((kfd = open("/dev/kvm", O_RDWR)) < 0) {
+		error_report("can't open /dev/kvm for vnic: %s\n",
+		    strerror(errno));
+		return (-1);
+	}
+
+	/* XXX We shouldn't be embedding the KVM_NET_QUEUE fd */
+	if (ioctl(kfd, 0x2000ae21, vfd) < 0) {
+		error_report("can't ioctl: %s\n", strerror(errno));
+		return (-1);
+	}
+
+	(void) close(kfd);
+
+	return (0);
+}
+
+int
+net_init_vnic(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan)
+{
+	int fd, len;
+	const char *ifname, *mac;
+	uchar_t *macaddr;
+	VLANClientState *ncp;
+	VNICState *vsp;
+
+	if ((ifname = qemu_opt_get(opts, "ifname")) == NULL) {
+		error_report("missing ifname required for vnic\n");
+		return (-1);
+	}
+
+	if ((mac = qemu_opt_get(opts, "macaddr")) == NULL) {
+		error_report("missing macaddr required for vnic\n");
+		return (-1);
+	}
+
+	macaddr = _link_aton(mac, &len);
+	if (macaddr == NULL || len != ETHERADDRL) {
+		error_report("invalid macaddr for vnic: %s\n", mac);
+		return (-1);
+	}
+
+	ncp = qemu_new_net_client(&net_vnic_info, vlan, NULL, "vnic", name);
+	vsp = DO_UPCAST(VNICState, vns_nc, ncp);
+
+	if (dlpi_open(ifname, &vsp->vns_hdl, DLPI_RAW) != DLPI_SUCCESS) {
+		error_report("vnic: failed to open interface %s", ifname);
+		return (-1);
+	}
+
+	if (dlpi_bind(vsp->vns_hdl, DLPI_ANY_SAP, &vsp->vns_sap) != DLPI_SUCCESS) {
+		error_report("vnic: failed to bind interface %s", ifname);
+		return (-1);
+	}
+
+	assert(len == ETHERADDRL);
+	if (dlpi_set_physaddr(vsp->vns_hdl, DL_CURR_PHYS_ADDR, macaddr,
+	    ETHERADDRL) != DLPI_SUCCESS) {
+		error_report("vnic: failed to set mac address\n");
+		return (-1);
+	}
+
+	if (dlpi_promiscon(vsp->vns_hdl, DL_PROMISC_SAP) != DLPI_SUCCESS) {
+		error_report("vnic: failed to be promiscous with interface %s",
+		    ifname);
+		return (-1);
+	}
+
+	fd = dlpi_fd(vsp->vns_hdl);
+
+	if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
+		error_report("vnic: failed to set fd on interface %s to "
+		    "non-blocking: %s\n", ifname, strerror(errno));
+		return (-1);
+	}
+
+	vsp->vns_fd = fd;
+
+	snprintf(vsp->vns_nc.info_str, sizeof (vsp->vns_nc.info_str), "ifname=%s",
+	    qemu_opt_get(opts, "ifname"));
+
+	/* XXX This should be ifdef'd around whether or not KVM is present */
+#ifdef CONFIG_KVM
+	net_init_kvm(fd);
+#endif
+
+	/* We have to manually intialize the polling for read */
+	vnic_read_poll(vsp, 1);
+
+	return (0);
+}
diff --git a/net/vnic.h b/net/vnic.h
new file mode 100644
index 0000000..1fd6748
--- /dev/null
+++ b/net/vnic.h
@@ -0,0 +1,34 @@
+/*
+ * QEMU System Emulator
+ * Solaris VNIC support
+ *
+ * Copyright (c) 2011 Joyent, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef QEMU_NET_VNIC_H
+#define QEMU_NET_VNIC_H
+
+#include "net.h"
+#include "qemu-common.h"
+
+int net_init_vnic(QemuOpts *opts, Monitor *mon, const char *name,
+    VLANState *vlan);
+
+#endif /* QEMU_NET_VNIC_H */