xen: re-name XenDevice to XenLegacyDevice...

...and xen_backend.h to xen-legacy-backend.h

Rather than attempting to convert the existing backend infrastructure to
be QOM compliant (which would be hard to do in an incremental fashion),
subsequent patches will introduce a completely new framework for Xen PV
backends. Hence it is necessary to re-name parts of existing code to avoid
name clashes. The re-named 'legacy' infrastructure will be removed once all
backends have been ported to the new framework.

This patch is purely cosmetic. No functional change.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Anthony Perard <anthony.perard@citrix.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>

1 files changed, 0 insertions, 838 deletions

diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c
deleted file mode 100644
index 0bc6b1de60..0000000000
--- a/hw/xen/xen_backend.c
+++ /dev/null
@@ -1,838 +0,0 @@
-/*
- *  xen backend driver infrastructure
- *  (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; under version 2 of the 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 General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, see <http://www.gnu.org/licenses/>.
- *
- *  Contributions after 2012-01-13 are licensed under the terms of the
- *  GNU GPL, version 2 or (at your option) any later version.
- */
-
-/*
- * TODO: add some xenbus / xenstore concepts overview here.
- */
-
-#include "qemu/osdep.h"
-#include <sys/signal.h>
-
-#include "hw/hw.h"
-#include "hw/sysbus.h"
-#include "hw/boards.h"
-#include "qemu/log.h"
-#include "qapi/error.h"
-#include "hw/xen/xen_backend.h"
-#include "hw/xen/xen_pvdev.h"
-#include "monitor/qdev.h"
-
-#include <xen/grant_table.h>
-
-DeviceState *xen_sysdev;
-BusState *xen_sysbus;
-
-/* ------------------------------------------------------------- */
-
-/* public */
-struct xs_handle *xenstore = NULL;
-const char *xen_protocol;
-
-/* private */
-static bool xen_feature_grant_copy;
-static int debug;
-
-int xenstore_write_be_str(struct XenDevice *xendev, const char *node, const char *val)
-{
-    return xenstore_write_str(xendev->be, node, val);
-}
-
-int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival)
-{
-    return xenstore_write_int(xendev->be, node, ival);
-}
-
-int xenstore_write_be_int64(struct XenDevice *xendev, const char *node, int64_t ival)
-{
-    return xenstore_write_int64(xendev->be, node, ival);
-}
-
-char *xenstore_read_be_str(struct XenDevice *xendev, const char *node)
-{
-    return xenstore_read_str(xendev->be, node);
-}
-
-int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival)
-{
-    return xenstore_read_int(xendev->be, node, ival);
-}
-
-char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node)
-{
-    return xenstore_read_str(xendev->fe, node);
-}
-
-int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival)
-{
-    return xenstore_read_int(xendev->fe, node, ival);
-}
-
-int xenstore_read_fe_uint64(struct XenDevice *xendev, const char *node,
-                            uint64_t *uval)
-{
-    return xenstore_read_uint64(xendev->fe, node, uval);
-}
-
-/* ------------------------------------------------------------- */
-
-int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state)
-{
-    int rc;
-
-    rc = xenstore_write_be_int(xendev, "state", state);
-    if (rc < 0) {
-        return rc;
-    }
-    xen_pv_printf(xendev, 1, "backend state: %s -> %s\n",
-                  xenbus_strstate(xendev->be_state), xenbus_strstate(state));
-    xendev->be_state = state;
-    return 0;
-}
-
-void xen_be_set_max_grant_refs(struct XenDevice *xendev,
-                               unsigned int nr_refs)
-{
-    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
-
-    if (xengnttab_set_max_grants(xendev->gnttabdev, nr_refs)) {
-        xen_pv_printf(xendev, 0, "xengnttab_set_max_grants failed: %s\n",
-                      strerror(errno));
-    }
-}
-
-void *xen_be_map_grant_refs(struct XenDevice *xendev, uint32_t *refs,
-                            unsigned int nr_refs, int prot)
-{
-    void *ptr;
-
-    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
-
-    ptr = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_refs,
-                                          xen_domid, refs, prot);
-    if (!ptr) {
-        xen_pv_printf(xendev, 0,
-                      "xengnttab_map_domain_grant_refs failed: %s\n",
-                      strerror(errno));
-    }
-
-    return ptr;
-}
-
-void xen_be_unmap_grant_refs(struct XenDevice *xendev, void *ptr,
-                             unsigned int nr_refs)
-{
-    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
-
-    if (xengnttab_unmap(xendev->gnttabdev, ptr, nr_refs)) {
-        xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n",
-                      strerror(errno));
-    }
-}
-
-static int compat_copy_grant_refs(struct XenDevice *xendev,
-                                  bool to_domain,
-                                  XenGrantCopySegment segs[],
-                                  unsigned int nr_segs)
-{
-    uint32_t *refs = g_new(uint32_t, nr_segs);
-    int prot = to_domain ? PROT_WRITE : PROT_READ;
-    void *pages;
-    unsigned int i;
-
-    for (i = 0; i < nr_segs; i++) {
-        XenGrantCopySegment *seg = &segs[i];
-
-        refs[i] = to_domain ?
-            seg->dest.foreign.ref : seg->source.foreign.ref;
-    }
-
-    pages = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_segs,
-                                            xen_domid, refs, prot);
-    if (!pages) {
-        xen_pv_printf(xendev, 0,
-                      "xengnttab_map_domain_grant_refs failed: %s\n",
-                      strerror(errno));
-        g_free(refs);
-        return -1;
-    }
-
-    for (i = 0; i < nr_segs; i++) {
-        XenGrantCopySegment *seg = &segs[i];
-        void *page = pages + (i * XC_PAGE_SIZE);
-
-        if (to_domain) {
-            memcpy(page + seg->dest.foreign.offset, seg->source.virt,
-                   seg->len);
-        } else {
-            memcpy(seg->dest.virt, page + seg->source.foreign.offset,
-                   seg->len);
-        }
-    }
-
-    if (xengnttab_unmap(xendev->gnttabdev, pages, nr_segs)) {
-        xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n",
-                      strerror(errno));
-    }
-
-    g_free(refs);
-    return 0;
-}
-
-int xen_be_copy_grant_refs(struct XenDevice *xendev,
-                           bool to_domain,
-                           XenGrantCopySegment segs[],
-                           unsigned int nr_segs)
-{
-    xengnttab_grant_copy_segment_t *xengnttab_segs;
-    unsigned int i;
-    int rc;
-
-    assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV);
-
-    if (!xen_feature_grant_copy) {
-        return compat_copy_grant_refs(xendev, to_domain, segs, nr_segs);
-    }
-
-    xengnttab_segs = g_new0(xengnttab_grant_copy_segment_t, nr_segs);
-
-    for (i = 0; i < nr_segs; i++) {
-        XenGrantCopySegment *seg = &segs[i];
-        xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i];
-
-        if (to_domain) {
-            xengnttab_seg->flags = GNTCOPY_dest_gref;
-            xengnttab_seg->dest.foreign.domid = xen_domid;
-            xengnttab_seg->dest.foreign.ref = seg->dest.foreign.ref;
-            xengnttab_seg->dest.foreign.offset = seg->dest.foreign.offset;
-            xengnttab_seg->source.virt = seg->source.virt;
-        } else {
-            xengnttab_seg->flags = GNTCOPY_source_gref;
-            xengnttab_seg->source.foreign.domid = xen_domid;
-            xengnttab_seg->source.foreign.ref = seg->source.foreign.ref;
-            xengnttab_seg->source.foreign.offset =
-                seg->source.foreign.offset;
-            xengnttab_seg->dest.virt = seg->dest.virt;
-        }
-
-        xengnttab_seg->len = seg->len;
-    }
-
-    rc = xengnttab_grant_copy(xendev->gnttabdev, nr_segs, xengnttab_segs);
-
-    if (rc) {
-        xen_pv_printf(xendev, 0, "xengnttab_copy failed: %s\n",
-                      strerror(errno));
-    }
-
-    for (i = 0; i < nr_segs; i++) {
-        xengnttab_grant_copy_segment_t *xengnttab_seg =
-            &xengnttab_segs[i];
-
-        if (xengnttab_seg->status != GNTST_okay) {
-            xen_pv_printf(xendev, 0, "segment[%u] status: %d\n", i,
-                          xengnttab_seg->status);
-            rc = -1;
-        }
-    }
-
-    g_free(xengnttab_segs);
-    return rc;
-}
-
-/*
- * get xen backend device, allocate a new one if it doesn't exist.
- */
-static struct XenDevice *xen_be_get_xendev(const char *type, int dom, int dev,
-                                           struct XenDevOps *ops)
-{
-    struct XenDevice *xendev;
-
-    xendev = xen_pv_find_xendev(type, dom, dev);
-    if (xendev) {
-        return xendev;
-    }
-
-    /* init new xendev */
-    xendev = g_malloc0(ops->size);
-    object_initialize(&xendev->qdev, ops->size, TYPE_XENBACKEND);
-    OBJECT(xendev)->free = g_free;
-    qdev_set_parent_bus(DEVICE(xendev), xen_sysbus);
-    qdev_set_id(DEVICE(xendev), g_strdup_printf("xen-%s-%d", type, dev));
-    qdev_init_nofail(DEVICE(xendev));
-    object_unref(OBJECT(xendev));
-
-    xendev->type  = type;
-    xendev->dom   = dom;
-    xendev->dev   = dev;
-    xendev->ops   = ops;
-
-    snprintf(xendev->be, sizeof(xendev->be), "backend/%s/%d/%d",
-             xendev->type, xendev->dom, xendev->dev);
-    snprintf(xendev->name, sizeof(xendev->name), "%s-%d",
-             xendev->type, xendev->dev);
-
-    xendev->debug      = debug;
-    xendev->local_port = -1;
-
-    xendev->evtchndev = xenevtchn_open(NULL, 0);
-    if (xendev->evtchndev == NULL) {
-        xen_pv_printf(NULL, 0, "can't open evtchn device\n");
-        qdev_unplug(DEVICE(xendev), NULL);
-        return NULL;
-    }
-    qemu_set_cloexec(xenevtchn_fd(xendev->evtchndev));
-
-    xen_pv_insert_xendev(xendev);
-
-    if (xendev->ops->alloc) {
-        xendev->ops->alloc(xendev);
-    }
-
-    return xendev;
-}
-
-
-/*
- * Sync internal data structures on xenstore updates.
- * Node specifies the changed field.  node = NULL means
- * update all fields (used for initialization).
- */
-static void xen_be_backend_changed(struct XenDevice *xendev, const char *node)
-{
-    if (node == NULL  ||  strcmp(node, "online") == 0) {
-        if (xenstore_read_be_int(xendev, "online", &xendev->online) == -1) {
-            xendev->online = 0;
-        }
-    }
-
-    if (node) {
-        xen_pv_printf(xendev, 2, "backend update: %s\n", node);
-        if (xendev->ops->backend_changed) {
-            xendev->ops->backend_changed(xendev, node);
-        }
-    }
-}
-
-static void xen_be_frontend_changed(struct XenDevice *xendev, const char *node)
-{
-    int fe_state;
-
-    if (node == NULL  ||  strcmp(node, "state") == 0) {
-        if (xenstore_read_fe_int(xendev, "state", &fe_state) == -1) {
-            fe_state = XenbusStateUnknown;
-        }
-        if (xendev->fe_state != fe_state) {
-            xen_pv_printf(xendev, 1, "frontend state: %s -> %s\n",
-                          xenbus_strstate(xendev->fe_state),
-                          xenbus_strstate(fe_state));
-        }
-        xendev->fe_state = fe_state;
-    }
-    if (node == NULL  ||  strcmp(node, "protocol") == 0) {
-        g_free(xendev->protocol);
-        xendev->protocol = xenstore_read_fe_str(xendev, "protocol");
-        if (xendev->protocol) {
-            xen_pv_printf(xendev, 1, "frontend protocol: %s\n",
-                          xendev->protocol);
-        }
-    }
-
-    if (node) {
-        xen_pv_printf(xendev, 2, "frontend update: %s\n", node);
-        if (xendev->ops->frontend_changed) {
-            xendev->ops->frontend_changed(xendev, node);
-        }
-    }
-}
-
-/* ------------------------------------------------------------- */
-/* Check for possible state transitions and perform them.        */
-
-/*
- * Initial xendev setup.  Read frontend path, register watch for it.
- * Should succeed once xend finished setting up the backend device.
- *
- * Also sets initial state (-> Initializing) when done.  Which
- * only affects the xendev->be_state variable as xenbus should
- * already be put into that state by xend.
- */
-static int xen_be_try_setup(struct XenDevice *xendev)
-{
-    char token[XEN_BUFSIZE];
-    int be_state;
-
-    if (xenstore_read_be_int(xendev, "state", &be_state) == -1) {
-        xen_pv_printf(xendev, 0, "reading backend state failed\n");
-        return -1;
-    }
-
-    if (be_state != XenbusStateInitialising) {
-        xen_pv_printf(xendev, 0, "initial backend state is wrong (%s)\n",
-                      xenbus_strstate(be_state));
-        return -1;
-    }
-
-    xendev->fe = xenstore_read_be_str(xendev, "frontend");
-    if (xendev->fe == NULL) {
-        xen_pv_printf(xendev, 0, "reading frontend path failed\n");
-        return -1;
-    }
-
-    /* setup frontend watch */
-    snprintf(token, sizeof(token), "fe:%p", xendev);
-    if (!xs_watch(xenstore, xendev->fe, token)) {
-        xen_pv_printf(xendev, 0, "watching frontend path (%s) failed\n",
-                      xendev->fe);
-        return -1;
-    }
-    xen_be_set_state(xendev, XenbusStateInitialising);
-
-    xen_be_backend_changed(xendev, NULL);
-    xen_be_frontend_changed(xendev, NULL);
-    return 0;
-}
-
-/*
- * Try initialize xendev.  Prepare everything the backend can do
- * without synchronizing with the frontend.  Fakes hotplug-status.  No
- * hotplug involved here because this is about userspace drivers, thus
- * there are kernel backend devices which could invoke hotplug.
- *
- * Goes to InitWait on success.
- */
-static int xen_be_try_init(struct XenDevice *xendev)
-{
-    int rc = 0;
-
-    if (!xendev->online) {
-        xen_pv_printf(xendev, 1, "not online\n");
-        return -1;
-    }
-
-    if (xendev->ops->init) {
-        rc = xendev->ops->init(xendev);
-    }
-    if (rc != 0) {
-        xen_pv_printf(xendev, 1, "init() failed\n");
-        return rc;
-    }
-
-    xenstore_write_be_str(xendev, "hotplug-status", "connected");
-    xen_be_set_state(xendev, XenbusStateInitWait);
-    return 0;
-}
-
-/*
- * Try to initialise xendev.  Depends on the frontend being ready
- * for it (shared ring and evtchn info in xenstore, state being
- * Initialised or Connected).
- *
- * Goes to Connected on success.
- */
-static int xen_be_try_initialise(struct XenDevice *xendev)
-{
-    int rc = 0;
-
-    if (xendev->fe_state != XenbusStateInitialised  &&
-        xendev->fe_state != XenbusStateConnected) {
-        if (xendev->ops->flags & DEVOPS_FLAG_IGNORE_STATE) {
-            xen_pv_printf(xendev, 2, "frontend not ready, ignoring\n");
-        } else {
-            xen_pv_printf(xendev, 2, "frontend not ready (yet)\n");
-            return -1;
-        }
-    }
-
-    if (xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV) {
-        xendev->gnttabdev = xengnttab_open(NULL, 0);
-        if (xendev->gnttabdev == NULL) {
-            xen_pv_printf(NULL, 0, "can't open gnttab device\n");
-            return -1;
-        }
-    } else {
-        xendev->gnttabdev = NULL;
-    }
-
-    if (xendev->ops->initialise) {
-        rc = xendev->ops->initialise(xendev);
-    }
-    if (rc != 0) {
-        xen_pv_printf(xendev, 0, "initialise() failed\n");
-        return rc;
-    }
-
-    xen_be_set_state(xendev, XenbusStateConnected);
-    return 0;
-}
-
-/*
- * Try to let xendev know that it is connected.  Depends on the
- * frontend being Connected.  Note that this may be called more
- * than once since the backend state is not modified.
- */
-static void xen_be_try_connected(struct XenDevice *xendev)
-{
-    if (!xendev->ops->connected) {
-        return;
-    }
-
-    if (xendev->fe_state != XenbusStateConnected) {
-        if (xendev->ops->flags & DEVOPS_FLAG_IGNORE_STATE) {
-            xen_pv_printf(xendev, 2, "frontend not ready, ignoring\n");
-        } else {
-            xen_pv_printf(xendev, 2, "frontend not ready (yet)\n");
-            return;
-        }
-    }
-
-    xendev->ops->connected(xendev);
-}
-
-/*
- * Teardown connection.
- *
- * Goes to Closed when done.
- */
-static void xen_be_disconnect(struct XenDevice *xendev, enum xenbus_state state)
-{
-    if (xendev->be_state != XenbusStateClosing &&
-        xendev->be_state != XenbusStateClosed  &&
-        xendev->ops->disconnect) {
-        xendev->ops->disconnect(xendev);
-    }
-    if (xendev->gnttabdev) {
-        xengnttab_close(xendev->gnttabdev);
-        xendev->gnttabdev = NULL;
-    }
-    if (xendev->be_state != state) {
-        xen_be_set_state(xendev, state);
-    }
-}
-
-/*
- * Try to reset xendev, for reconnection by another frontend instance.
- */
-static int xen_be_try_reset(struct XenDevice *xendev)
-{
-    if (xendev->fe_state != XenbusStateInitialising) {
-        return -1;
-    }
-
-    xen_pv_printf(xendev, 1, "device reset (for re-connect)\n");
-    xen_be_set_state(xendev, XenbusStateInitialising);
-    return 0;
-}
-
-/*
- * state change dispatcher function
- */
-void xen_be_check_state(struct XenDevice *xendev)
-{
-    int rc = 0;
-
-    /* frontend may request shutdown from almost anywhere */
-    if (xendev->fe_state == XenbusStateClosing ||
-        xendev->fe_state == XenbusStateClosed) {
-        xen_be_disconnect(xendev, xendev->fe_state);
-        return;
-    }
-
-    /* check for possible backend state transitions */
-    for (;;) {
-        switch (xendev->be_state) {
-        case XenbusStateUnknown:
-            rc = xen_be_try_setup(xendev);
-            break;
-        case XenbusStateInitialising:
-            rc = xen_be_try_init(xendev);
-            break;
-        case XenbusStateInitWait:
-            rc = xen_be_try_initialise(xendev);
-            break;
-        case XenbusStateConnected:
-            /* xendev->be_state doesn't change */
-            xen_be_try_connected(xendev);
-            rc = -1;
-            break;
-        case XenbusStateClosed:
-            rc = xen_be_try_reset(xendev);
-            break;
-        default:
-            rc = -1;
-        }
-        if (rc != 0) {
-            break;
-        }
-    }
-}
-
-/* ------------------------------------------------------------- */
-
-static int xenstore_scan(const char *type, int dom, struct XenDevOps *ops)
-{
-    struct XenDevice *xendev;
-    char path[XEN_BUFSIZE], token[XEN_BUFSIZE];
-    char **dev = NULL;
-    unsigned int cdev, j;
-
-    /* setup watch */
-    snprintf(token, sizeof(token), "be:%p:%d:%p", type, dom, ops);
-    snprintf(path, sizeof(path), "backend/%s/%d", type, dom);
-    if (!xs_watch(xenstore, path, token)) {
-        xen_pv_printf(NULL, 0, "xen be: watching backend path (%s) failed\n",
-                      path);
-        return -1;
-    }
-
-    /* look for backends */
-    dev = xs_directory(xenstore, 0, path, &cdev);
-    if (!dev) {
-        return 0;
-    }
-    for (j = 0; j < cdev; j++) {
-        xendev = xen_be_get_xendev(type, dom, atoi(dev[j]), ops);
-        if (xendev == NULL) {
-            continue;
-        }
-        xen_be_check_state(xendev);
-    }
-    free(dev);
-    return 0;
-}
-
-void xenstore_update_be(char *watch, char *type, int dom,
-                        struct XenDevOps *ops)
-{
-    struct XenDevice *xendev;
-    char path[XEN_BUFSIZE], *bepath;
-    unsigned int len, dev;
-
-    len = snprintf(path, sizeof(path), "backend/%s/%d", type, dom);
-    if (strncmp(path, watch, len) != 0) {
-        return;
-    }
-    if (sscanf(watch+len, "/%u/%255s", &dev, path) != 2) {
-        strcpy(path, "");
-        if (sscanf(watch+len, "/%u", &dev) != 1) {
-            dev = -1;
-        }
-    }
-    if (dev == -1) {
-        return;
-    }
-
-    xendev = xen_be_get_xendev(type, dom, dev, ops);
-    if (xendev != NULL) {
-        bepath = xs_read(xenstore, 0, xendev->be, &len);
-        if (bepath == NULL) {
-            xen_pv_del_xendev(xendev);
-        } else {
-            free(bepath);
-            xen_be_backend_changed(xendev, path);
-            xen_be_check_state(xendev);
-        }
-    }
-}
-
-void xenstore_update_fe(char *watch, struct XenDevice *xendev)
-{
-    char *node;
-    unsigned int len;
-
-    len = strlen(xendev->fe);
-    if (strncmp(xendev->fe, watch, len) != 0) {
-        return;
-    }
-    if (watch[len] != '/') {
-        return;
-    }
-    node = watch + len + 1;
-
-    xen_be_frontend_changed(xendev, node);
-    xen_be_check_state(xendev);
-}
-/* -------------------------------------------------------------------- */
-
-int xen_be_init(void)
-{
-    xengnttab_handle *gnttabdev;
-
-    xenstore = xs_daemon_open();
-    if (!xenstore) {
-        xen_pv_printf(NULL, 0, "can't connect to xenstored\n");
-        return -1;
-    }
-
-    qemu_set_fd_handler(xs_fileno(xenstore), xenstore_update, NULL, NULL);
-
-    if (xen_xc == NULL || xen_fmem == NULL) {
-        /* Check if xen_init() have been called */
-        goto err;
-    }
-
-    gnttabdev = xengnttab_open(NULL, 0);
-    if (gnttabdev != NULL) {
-        if (xengnttab_grant_copy(gnttabdev, 0, NULL) == 0) {
-            xen_feature_grant_copy = true;
-        }
-        xengnttab_close(gnttabdev);
-    }
-
-    xen_sysdev = qdev_create(NULL, TYPE_XENSYSDEV);
-    qdev_init_nofail(xen_sysdev);
-    xen_sysbus = qbus_create(TYPE_XENSYSBUS, DEVICE(xen_sysdev), "xen-sysbus");
-    qbus_set_bus_hotplug_handler(xen_sysbus, &error_abort);
-
-    return 0;
-
-err:
-    qemu_set_fd_handler(xs_fileno(xenstore), NULL, NULL, NULL);
-    xs_daemon_close(xenstore);
-    xenstore = NULL;
-
-    return -1;
-}
-
-static void xen_set_dynamic_sysbus(void)
-{
-    Object *machine = qdev_get_machine();
-    ObjectClass *oc = object_get_class(machine);
-    MachineClass *mc = MACHINE_CLASS(oc);
-
-    machine_class_allow_dynamic_sysbus_dev(mc, TYPE_XENSYSDEV);
-}
-
-int xen_be_register(const char *type, struct XenDevOps *ops)
-{
-    char path[50];
-    int rc;
-
-    if (ops->backend_register) {
-        rc = ops->backend_register();
-        if (rc) {
-            return rc;
-        }
-    }
-
-    snprintf(path, sizeof(path), "device-model/%u/backends/%s", xen_domid,
-             type);
-    xenstore_mkdir(path, XS_PERM_NONE);
-
-    return xenstore_scan(type, xen_domid, ops);
-}
-
-void xen_be_register_common(void)
-{
-    xen_set_dynamic_sysbus();
-
-    xen_be_register("console", &xen_console_ops);
-    xen_be_register("vkbd", &xen_kbdmouse_ops);
-    xen_be_register("qdisk", &xen_blkdev_ops);
-#ifdef CONFIG_VIRTFS
-    xen_be_register("9pfs", &xen_9pfs_ops);
-#endif
-#ifdef CONFIG_USB_LIBUSB
-    xen_be_register("qusb", &xen_usb_ops);
-#endif
-}
-
-int xen_be_bind_evtchn(struct XenDevice *xendev)
-{
-    if (xendev->local_port != -1) {
-        return 0;
-    }
-    xendev->local_port = xenevtchn_bind_interdomain
-        (xendev->evtchndev, xendev->dom, xendev->remote_port);
-    if (xendev->local_port == -1) {
-        xen_pv_printf(xendev, 0, "xenevtchn_bind_interdomain failed\n");
-        return -1;
-    }
-    xen_pv_printf(xendev, 2, "bind evtchn port %d\n", xendev->local_port);
-    qemu_set_fd_handler(xenevtchn_fd(xendev->evtchndev),
-                        xen_pv_evtchn_event, NULL, xendev);
-    return 0;
-}
-
-
-static Property xendev_properties[] = {
-    DEFINE_PROP_END_OF_LIST(),
-};
-
-static void xendev_class_init(ObjectClass *klass, void *data)
-{
-    DeviceClass *dc = DEVICE_CLASS(klass);
-
-    dc->props = xendev_properties;
-    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
-    /* xen-backend devices can be plugged/unplugged dynamically */
-    dc->user_creatable = true;
-}
-
-static const TypeInfo xendev_type_info = {
-    .name          = TYPE_XENBACKEND,
-    .parent        = TYPE_XENSYSDEV,
-    .class_init    = xendev_class_init,
-    .instance_size = sizeof(struct XenDevice),
-};
-
-static void xen_sysbus_class_init(ObjectClass *klass, void *data)
-{
-    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
-
-    hc->unplug = qdev_simple_device_unplug_cb;
-}
-
-static const TypeInfo xensysbus_info = {
-    .name       = TYPE_XENSYSBUS,
-    .parent     = TYPE_BUS,
-    .class_init = xen_sysbus_class_init,
-    .interfaces = (InterfaceInfo[]) {
-        { TYPE_HOTPLUG_HANDLER },
-        { }
-    }
-};
-
-static Property xen_sysdev_properties[] = {
-    {/* end of property list */},
-};
-
-static void xen_sysdev_class_init(ObjectClass *klass, void *data)
-{
-    DeviceClass *dc = DEVICE_CLASS(klass);
-
-    dc->props = xen_sysdev_properties;
-    dc->bus_type = TYPE_XENSYSBUS;
-}
-
-static const TypeInfo xensysdev_info = {
-    .name          = TYPE_XENSYSDEV,
-    .parent        = TYPE_SYS_BUS_DEVICE,
-    .instance_size = sizeof(SysBusDevice),
-    .class_init    = xen_sysdev_class_init,
-};
-
-static void xenbe_register_types(void)
-{
-    type_register_static(&xensysbus_info);
-    type_register_static(&xensysdev_info);
-    type_register_static(&xendev_type_info);
-}
-
-type_init(xenbe_register_types)