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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v9 22/25] COLO nic: implement COLO nic subkind
implement COLO nic subkind.
Signed-off-by: Yang Hongyang <hongyang.yang@xxxxxxxxxxxx>
Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
---
tools/hotplug/Linux/Makefile | 1 +
tools/hotplug/Linux/colo-proxy-setup | 135 +++++++++++++++
tools/libxl/Makefile | 1 +
tools/libxl/libxl_colo_nic.c | 321 +++++++++++++++++++++++++++++++++++
tools/libxl/libxl_internal.h | 5 +
tools/libxl/libxl_types.idl | 1 +
6 files changed, 464 insertions(+)
create mode 100755 tools/hotplug/Linux/colo-proxy-setup
create mode 100644 tools/libxl/libxl_colo_nic.c
diff --git a/tools/hotplug/Linux/Makefile b/tools/hotplug/Linux/Makefile
index 6e10118..9bb852b 100644
--- a/tools/hotplug/Linux/Makefile
+++ b/tools/hotplug/Linux/Makefile
@@ -28,6 +28,7 @@ XEN_SCRIPTS += block-iscsi
XEN_SCRIPTS += block-tap
XEN_SCRIPTS += block-drbd-probe
XEN_SCRIPTS += $(XEN_SCRIPTS-y)
+XEN_SCRIPTS += colo-proxy-setup
SUBDIRS-$(CONFIG_SYSTEMD) += systemd
diff --git a/tools/hotplug/Linux/colo-proxy-setup
b/tools/hotplug/Linux/colo-proxy-setup
new file mode 100755
index 0000000..94e2034
--- /dev/null
+++ b/tools/hotplug/Linux/colo-proxy-setup
@@ -0,0 +1,135 @@
+#! /bin/bash
+
+dir=$(dirname "$0")
+. "$dir/xen-hotplug-common.sh"
+. "$dir/hotplugpath.sh"
+
+findCommand "$@"
+
+if [ "$command" != "setup" -a "$command" != "teardown" ]
+then
+ echo "Invalid command: $command"
+ log err "Invalid command: $command"
+ exit 1
+fi
+
+evalVariables "$@"
+
+: ${vifname:?}
+: ${forwarddev:?}
+: ${mode:?}
+: ${index:?}
+: ${bridge:?}
+
+forwardbr="colobr0"
+
+if [ "$mode" != "primary" -a "$mode" != "secondary" ]
+then
+ echo "Invalid mode: $mode"
+ log err "Invalid mode: $mode"
+ exit 1
+fi
+
+if [ $index -lt 0 ] || [ $index -gt 100 ]; then
+ echo "index overflow"
+ exit 1
+fi
+
+function setup_primary()
+{
+ do_without_error tc qdisc add dev $vifname root handle 1: prio
+ do_without_error tc filter add dev $vifname parent 1: protocol ip prio 10 \
+ u32 match u32 0 0 flowid 1:2 action mirred egress mirror dev
$forwarddev
+ do_without_error tc filter add dev $vifname parent 1: protocol arp prio 11
\
+ u32 match u32 0 0 flowid 1:2 action mirred egress mirror dev
$forwarddev
+ do_without_error tc filter add dev $vifname parent 1: protocol ipv6 prio \
+ 12 u32 match u32 0 0 flowid 1:2 action mirred egress mirror \
+ dev $forwarddev
+
+ do_without_error modprobe nf_conntrack_ipv4
+ do_without_error modprobe xt_PMYCOLO sec_dev=$forwarddev
+
+ iptables -t mangle -I PREROUTING -m physdev --physdev-in \
+ $vifname -j PMYCOLO --index $index
+ ip6tables -t mangle -I PREROUTING -m physdev --physdev-in \
+ $vifname -j PMYCOLO --index $index
+ do_without_error arptables -I INPUT -i $forwarddev -j MARK --set-mark
$index
+}
+
+function teardown_primary()
+{
+ do_without_error tc filter del dev $vifname parent 1: protocol ip prio 10
u32 match u32 \
+ 0 0 flowid 1:2 action mirred egress mirror dev $forwarddev
+ do_without_error tc filter del dev $vifname parent 1: protocol arp prio 11
u32 match u32 \
+ 0 0 flowid 1:2 action mirred egress mirror dev $forwarddev
+ do_without_error tc filter del dev $vifname parent 1: protocol ipv6 prio
12 u32 match u32 \
+ 0 0 flowid 1:2 action mirred egress mirror dev $forwarddev
+ do_without_error tc qdisc del dev $vifname root handle 1: prio
+
+ do_without_error iptables -t mangle -D PREROUTING -m physdev --physdev-in \
+ $vifname -j PMYCOLO --index $index
+ do_without_error ip6tables -t mangle -D PREROUTING -m physdev --physdev-in
\
+ $vifname -j PMYCOLO --index $index
+ do_without_error arptables -F
+ do_without_error rmmod xt_PMYCOLO
+}
+
+function setup_secondary()
+{
+ do_without_error brctl delif $bridge $vifname
+ do_without_error brctl addbr $forwardbr
+ do_without_error brctl addif $forwardbr $vifname
+ do_without_error brctl addif $forwardbr $forwarddev
+ do_without_error ip link set dev $forwardbr up
+ do_without_error modprobe xt_SECCOLO
+
+ iptables -t mangle -I PREROUTING -m physdev --physdev-in \
+ $vifname -j SECCOLO --index $index
+ ip6tables -t mangle -I PREROUTING -m physdev --physdev-in \
+ $vifname -j SECCOLO --index $index
+}
+
+function teardown_secondary()
+{
+ do_without_error brctl delif $forwardbr $forwarddev
+ do_without_error brctl delif $forwardbr $vifname
+ do_without_error brctl delbr $forwardbr
+ do_without_error brctl addif $bridge $vifname
+
+ do_without_error iptables -t mangle -D PREROUTING -m physdev --physdev-in \
+ $vifname -j SECCOLO --index $index
+ do_without_error ip6tables -t mangle -D PREROUTING -m physdev --physdev-in
\
+ $vifname -j SECCOLO --index $index
+ do_without_error rmmod xt_SECCOLO
+}
+
+case "$command" in
+ setup)
+ if [ "$mode" = "primary" ]
+ then
+ setup_primary
+ else
+ setup_secondary
+ fi
+
+ success
+ ;;
+ teardown)
+ if [ "$mode" = "primary" ]
+ then
+ teardown_primary
+ else
+ teardown_secondary
+ fi
+ ;;
+esac
+
+if [ "$mode" = "primary" ]
+then
+ log debug "Successful colo-proxy-setup $command for $vifname." \
+ " vifname: $vifname, index: $index, forwarddev: $forwarddev."
+else
+ log debug "Successful colo-proxy-setup $command for $vifname." \
+ " vifname: $vifname, index: $index, forwarddev: $forwarddev,"\
+ " forwardbr: $forwardbr."
+fi
diff --git a/tools/libxl/Makefile b/tools/libxl/Makefile
index 8c7e5c0..407794e 100644
--- a/tools/libxl/Makefile
+++ b/tools/libxl/Makefile
@@ -66,6 +66,7 @@ LIBXL_OBJS-y += libxl_remus.o libxl_checkpoint_device.o
libxl_remus_disk_drbd.o
LIBXL_OBJS-y += libxl_colo_restore.o libxl_colo_save.o
LIBXL_OBJS-y += libxl_colo_qdisk.o
LIBXL_OBJS-y += libxl_colo_proxy.o
+LIBXL_OBJS-y += libxl_colo_nic.o
LIBXL_OBJS-$(CONFIG_X86) += libxl_cpuid.o libxl_x86.o libxl_psr.o
LIBXL_OBJS-$(CONFIG_ARM) += libxl_nocpuid.o libxl_arm.o libxl_libfdt_compat.o
diff --git a/tools/libxl/libxl_colo_nic.c b/tools/libxl/libxl_colo_nic.c
new file mode 100644
index 0000000..998e09c
--- /dev/null
+++ b/tools/libxl/libxl_colo_nic.c
@@ -0,0 +1,321 @@
+/*
+ * Copyright (C) 2014 FUJITSU LIMITED
+ * Author: Wen Congyang <wency@xxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file LICENSE.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ */
+
+#include "libxl_osdeps.h" /* must come before any other headers */
+
+#include "libxl_internal.h"
+
+typedef struct libxl__colo_device_nic {
+ int devid;
+ const char *vif;
+} libxl__colo_device_nic;
+
+enum {
+ primary,
+ secondary,
+};
+
+
+/* ========== init() and cleanup() ========== */
+int init_subkind_colo_nic(libxl__checkpoint_devices_state *cds)
+{
+ return 0;
+}
+
+void cleanup_subkind_colo_nic(libxl__checkpoint_devices_state *cds)
+{
+}
+
+/* ========== helper functions ========== */
+static void colo_save_setup_script_cb(libxl__egc *egc,
+ libxl__async_exec_state *aes,
+ int rc, int status);
+static void colo_save_teardown_script_cb(libxl__egc *egc,
+ libxl__async_exec_state *aes,
+ int rc, int status);
+
+/*
+ * If the device has a vifname, then use that instead of
+ * the vifX.Y format.
+ * it must ONLY be used for remus because if driver domains
+ * were in use it would constitute a security vulnerability.
+ */
+static const char *get_vifname(libxl__checkpoint_device *dev,
+ const libxl_device_nic *nic)
+{
+ const char *vifname = NULL;
+ const char *path;
+ int rc;
+
+ STATE_AO_GC(dev->cds->ao);
+
+ /* Convenience aliases */
+ const uint32_t domid = dev->cds->domid;
+
+ path = GCSPRINTF("%s/backend/vif/%d/%d/vifname",
+ libxl__xs_get_dompath(gc, 0), domid, nic->devid);
+ rc = libxl__xs_read_checked(gc, XBT_NULL, path, &vifname);
+ if (!rc && !vifname) {
+ vifname = libxl__device_nic_devname(gc, domid,
+ nic->devid,
+ nic->nictype);
+ }
+
+ return vifname;
+}
+
+/*
+ * the script needs the following env & args
+ * $vifname
+ * $forwarddev
+ * $mode(primary/secondary)
+ * $index
+ * $bridge
+ * setup/teardown as command line arg.
+ */
+static void setup_async_exec(libxl__checkpoint_device *dev, char *op,
+ libxl__colo_proxy_state *cps, int side,
+ char *colo_proxy_script)
+{
+ int arraysize, nr = 0;
+ char **env = NULL, **args = NULL;
+ libxl__colo_device_nic *colo_nic = dev->concrete_data;
+ libxl__checkpoint_devices_state *cds = dev->cds;
+ libxl__async_exec_state *aes = &dev->aodev.aes;
+ const libxl_device_nic *nic = dev->backend_dev;
+
+ STATE_AO_GC(cds->ao);
+
+ /* Convenience aliases */
+ const char *const vif = colo_nic->vif;
+
+ arraysize = 11;
+ GCNEW_ARRAY(env, arraysize);
+ env[nr++] = "vifname";
+ env[nr++] = libxl__strdup(gc, vif);
+ env[nr++] = "forwarddev";
+ env[nr++] = libxl__strdup(gc, nic->forwarddev);
+ env[nr++] = "mode";
+ if (side == primary)
+ env[nr++] = "primary";
+ else
+ env[nr++] = "secondary";
+ env[nr++] = "index";
+ env[nr++] = GCSPRINTF("%d", cps->index);
+ env[nr++] = "bridge";
+ env[nr++] = libxl__strdup(gc, nic->bridge);
+ env[nr++] = NULL;
+ assert(nr == arraysize);
+
+ arraysize = 3; nr = 0;
+ GCNEW_ARRAY(args, arraysize);
+ args[nr++] = colo_proxy_script;
+ args[nr++] = op;
+ args[nr++] = NULL;
+ assert(nr == arraysize);
+
+ aes->ao = dev->cds->ao;
+ aes->what = GCSPRINTF("%s %s", args[0], args[1]);
+ aes->env = env;
+ aes->args = args;
+ aes->timeout_ms = LIBXL_HOTPLUG_TIMEOUT * 1000;
+ aes->stdfds[0] = -1;
+ aes->stdfds[1] = -1;
+ aes->stdfds[2] = -1;
+
+ if (!strcmp(op, "teardown"))
+ aes->callback = colo_save_teardown_script_cb;
+ else
+ aes->callback = colo_save_setup_script_cb;
+}
+
+/* ========== setup() and teardown() ========== */
+static void colo_nic_setup(libxl__egc *egc, libxl__checkpoint_device *dev,
+ libxl__colo_proxy_state *cps, int side,
+ char *colo_proxy_script)
+{
+ int rc;
+ libxl__colo_device_nic *colo_nic;
+ const libxl_device_nic *nic = dev->backend_dev;
+
+ STATE_AO_GC(dev->cds->ao);
+
+ /*
+ * thers's no subkind of nic devices, so nic ops is always matched
+ * with nic devices, we begin to setup the nic device
+ */
+ dev->matched = 1;
+
+ if (!nic->forwarddev) {
+ rc = ERROR_FAIL;
+ goto out;
+ }
+
+ GCNEW(colo_nic);
+ dev->concrete_data = colo_nic;
+ colo_nic->devid = nic->devid;
+ colo_nic->vif = get_vifname(dev, nic);
+ if (!colo_nic->vif) {
+ rc = ERROR_FAIL;
+ goto out;
+ }
+
+ setup_async_exec(dev, "setup", cps, side, colo_proxy_script);
+ rc = libxl__async_exec_start(&dev->aodev.aes);
+ if (rc)
+ goto out;
+
+ return;
+
+out:
+ dev->aodev.rc = rc;
+ dev->aodev.callback(egc, &dev->aodev);
+}
+
+static void colo_save_setup_script_cb(libxl__egc *egc,
+ libxl__async_exec_state *aes,
+ int rc, int status)
+{
+ libxl__ao_device *aodev = CONTAINER_OF(aes, *aodev, aes);
+ libxl__checkpoint_device *dev = CONTAINER_OF(aodev, *dev, aodev);
+ libxl__colo_device_nic *colo_nic = dev->concrete_data;
+ libxl__checkpoint_devices_state *cds = dev->cds;
+ const char *out_path_base, *hotplug_error = NULL;
+
+ EGC_GC;
+
+ /* Convenience aliases */
+ const uint32_t domid = cds->domid;
+ const int devid = colo_nic->devid;
+ const char *const vif = colo_nic->vif;
+
+ if (status && !rc)
+ rc = ERROR_FAIL;
+ if (rc)
+ goto out;
+
+ out_path_base = GCSPRINTF("%s/colo_proxy/%d",
+ libxl__xs_libxl_path(gc, domid), devid);
+
+ rc = libxl__xs_read_checked(gc, XBT_NULL,
+ GCSPRINTF("%s/hotplug-error", out_path_base),
+ &hotplug_error);
+ if (rc)
+ goto out;
+
+ if (hotplug_error) {
+ LOG(ERROR, "colo_proxy script %s setup failed for vif %s: %s",
+ aes->args[0], vif, hotplug_error);
+ rc = ERROR_FAIL;
+ goto out;
+ }
+
+ if (status) {
+ rc = ERROR_FAIL;
+ goto out;
+ }
+
+ rc = 0;
+
+out:
+ aodev->rc = rc;
+ aodev->callback(egc, aodev);
+}
+
+static void colo_nic_teardown(libxl__egc *egc, libxl__checkpoint_device *dev,
+ libxl__colo_proxy_state *cps, int side,
+ char *colo_proxy_script)
+{
+ int rc;
+ libxl__colo_device_nic *colo_nic = dev->concrete_data;
+
+ if (!colo_nic || !colo_nic->vif) {
+ /* colo nic has not yet been set up, just return */
+ rc = 0;
+ goto out;
+ }
+
+ setup_async_exec(dev, "teardown", cps, side, colo_proxy_script);
+
+ rc = libxl__async_exec_start(&dev->aodev.aes);
+ if (rc)
+ goto out;
+
+ return;
+
+out:
+ dev->aodev.rc = rc;
+ dev->aodev.callback(egc, &dev->aodev);
+}
+
+static void colo_save_teardown_script_cb(libxl__egc *egc,
+ libxl__async_exec_state *aes,
+ int rc, int status)
+{
+ libxl__ao_device *aodev = CONTAINER_OF(aes, *aodev, aes);
+
+ if (status && !rc)
+ rc = ERROR_FAIL;
+ else
+ rc = 0;
+
+ aodev->rc = rc;
+ aodev->callback(egc, aodev);
+}
+
+/* ======== primary ======== */
+static void colo_nic_save_setup(libxl__egc *egc, libxl__checkpoint_device *dev)
+{
+ libxl__colo_save_state *css = dev->cds->concrete_data;
+
+ colo_nic_setup(egc, dev, &css->cps, primary, css->colo_proxy_script);
+}
+
+static void colo_nic_save_teardown(libxl__egc *egc,
+ libxl__checkpoint_device *dev)
+{
+ libxl__colo_save_state *css = dev->cds->concrete_data;
+
+ colo_nic_teardown(egc, dev, &css->cps, primary, css->colo_proxy_script);
+}
+
+const libxl__checkpoint_device_instance_ops colo_save_device_nic = {
+ .kind = LIBXL__DEVICE_KIND_VIF,
+ .setup = colo_nic_save_setup,
+ .teardown = colo_nic_save_teardown,
+};
+
+/* ======== secondary ======== */
+static void colo_nic_restore_setup(libxl__egc *egc,
+ libxl__checkpoint_device *dev)
+{
+ libxl__colo_restore_state *crs = dev->cds->concrete_data;
+
+ colo_nic_setup(egc, dev, &crs->cps, secondary, crs->colo_proxy_script);
+}
+
+static void colo_nic_restore_teardown(libxl__egc *egc,
+ libxl__checkpoint_device *dev)
+{
+ libxl__colo_restore_state *crs = dev->cds->concrete_data;
+
+ colo_nic_teardown(egc, dev, &crs->cps, secondary, crs->colo_proxy_script);
+}
+
+const libxl__checkpoint_device_instance_ops colo_restore_device_nic = {
+ .kind = LIBXL__DEVICE_KIND_VIF,
+ .setup = colo_nic_restore_setup,
+ .teardown = colo_nic_restore_teardown,
+};
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index abaa98c..06e1ccc 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -2901,6 +2901,8 @@ int init_subkind_qdisk(libxl__checkpoint_devices_state
*cds);
void cleanup_subkind_qdisk(libxl__checkpoint_devices_state *cds);
int colo_qdisk_preresume(libxl_ctx *ctx, domid_t domid);
int colo_qdisk_start(libxl__egc *egc, domid_t domid, bool primary);
+int init_subkind_colo_nic(libxl__checkpoint_devices_state *cds);
+void cleanup_subkind_colo_nic(libxl__checkpoint_devices_state *cds);
typedef void libxl__checkpoint_callback(libxl__egc *,
libxl__checkpoint_devices_state *,
@@ -3122,6 +3124,7 @@ typedef struct libxl__colo_save_state
libxl__colo_save_state;
struct libxl__colo_save_state {
int send_fd;
int recv_fd;
+ char *colo_proxy_script;
/* private */
libxl__stream_read_state srs;
@@ -3536,6 +3539,7 @@ struct libxl__colo_restore_state {
int recv_fd;
int hvm;
libxl__colo_callback *callback;
+ char *colo_proxy_script;
/* private, colo restore checkpoint state */
libxl__domain_create_cb *saved_cb;
@@ -3565,6 +3569,7 @@ struct libxl__domain_create_state {
libxl_asyncprogress_how aop_console_how;
/* private to domain_create */
int guest_domid;
+ const char *colo_proxy_script;
libxl__domain_build_state build_state;
libxl__colo_restore_state crs;
libxl__checkpoint_devices_state cds;
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index 38f37f2..1981f8b 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -598,6 +598,7 @@ libxl_device_nic = Struct("device_nic", [
("rate_bytes_per_interval", uint64),
("rate_interval_usecs", uint32),
("gatewaydev", string),
+ ("forwarddev", string)
])
libxl_device_pci = Struct("device_pci", [
--
2.5.0
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