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[PATCH v2 13/27] hw/xen: Add xenstore operations to allow redirection to
|
From: |
David Woodhouse |
|
Subject: |
[PATCH v2 13/27] hw/xen: Add xenstore operations to allow redirection to internal emulation |
|
Date: |
Tue, 7 Mar 2023 17:17:36 +0000 |
From: Paul Durrant <pdurrant@amazon.com>
Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
---
accel/xen/xen-all.c | 11 +-
hw/char/xen_console.c | 2 +-
hw/i386/kvm/xen_xenstore.c | 3 -
hw/i386/kvm/xenstore_impl.h | 8 +-
hw/xen/xen-bus-helper.c | 62 +++----
hw/xen/xen-bus.c | 261 ++++------------------------
hw/xen/xen-legacy-backend.c | 119 +++++++------
hw/xen/xen-operations.c | 198 +++++++++++++++++++++
hw/xen/xen_devconfig.c | 4 +-
hw/xen/xen_pt_graphics.c | 1 -
hw/xen/xen_pvdev.c | 49 +-----
include/hw/xen/xen-bus-helper.h | 26 +--
include/hw/xen/xen-bus.h | 17 +-
include/hw/xen/xen-legacy-backend.h | 6 +-
include/hw/xen/xen_backend_ops.h | 163 +++++++++++++++++
include/hw/xen/xen_common.h | 1 -
include/hw/xen/xen_pvdev.h | 2 +-
softmmu/globals.c | 1 +
18 files changed, 525 insertions(+), 409 deletions(-)
diff --git a/accel/xen/xen-all.c b/accel/xen/xen-all.c
index e85e4aeba5..425216230f 100644
--- a/accel/xen/xen-all.c
+++ b/accel/xen/xen-all.c
@@ -90,12 +90,15 @@ void xenstore_store_pv_console_info(int i, Chardev *chr)
}
-static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
+static void xenstore_record_dm_state(const char *state)
{
+ struct xs_handle *xs;
char path[50];
+ /* We now have everything we need to set the xenstore entry. */
+ xs = xs_open(0);
if (xs == NULL) {
- error_report("xenstore connection not initialized");
+ fprintf(stderr, "Could not contact XenStore\n");
exit(1);
}
@@ -109,6 +112,8 @@ static void xenstore_record_dm_state(struct xs_handle *xs,
const char *state)
error_report("error recording dm state");
exit(1);
}
+
+ xs_close(xs);
}
@@ -117,7 +122,7 @@ static void xen_change_state_handler(void *opaque, bool
running,
{
if (running) {
/* record state running */
- xenstore_record_dm_state(xenstore, "running");
+ xenstore_record_dm_state("running");
}
}
diff --git a/hw/char/xen_console.c b/hw/char/xen_console.c
index e9cef3e1ef..ad8638a86d 100644
--- a/hw/char/xen_console.c
+++ b/hw/char/xen_console.c
@@ -181,7 +181,7 @@ static int con_init(struct XenLegacyDevice *xendev)
const char *output;
/* setup */
- dom = xs_get_domain_path(xenstore, con->xendev.dom);
+ dom = qemu_xen_xs_get_domain_path(xenstore, con->xendev.dom);
if (!xendev->dev) {
snprintf(con->console, sizeof(con->console), "%s/console", dom);
} else {
diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c
index fb3648a058..35898e9b37 100644
--- a/hw/i386/kvm/xen_xenstore.c
+++ b/hw/i386/kvm/xen_xenstore.c
@@ -38,9 +38,6 @@
#define TYPE_XEN_XENSTORE "xen-xenstore"
OBJECT_DECLARE_SIMPLE_TYPE(XenXenstoreState, XEN_XENSTORE)
-#define XEN_PAGE_SHIFT 12
-#define XEN_PAGE_SIZE (1ULL << XEN_PAGE_SHIFT)
-
#define ENTRIES_PER_FRAME_V1 (XEN_PAGE_SIZE / sizeof(grant_entry_v1_t))
#define ENTRIES_PER_FRAME_V2 (XEN_PAGE_SIZE / sizeof(grant_entry_v2_t))
diff --git a/hw/i386/kvm/xenstore_impl.h b/hw/i386/kvm/xenstore_impl.h
index bbe2391e2e..0df2a91aae 100644
--- a/hw/i386/kvm/xenstore_impl.h
+++ b/hw/i386/kvm/xenstore_impl.h
@@ -12,13 +12,7 @@
#ifndef QEMU_XENSTORE_IMPL_H
#define QEMU_XENSTORE_IMPL_H
-typedef uint32_t xs_transaction_t;
-
-#define XBT_NULL 0
-
-#define XS_PERM_NONE 0x00
-#define XS_PERM_READ 0x01
-#define XS_PERM_WRITE 0x02
+#include "hw/xen/xen_backend_ops.h"
typedef struct XenstoreImplState XenstoreImplState;
diff --git a/hw/xen/xen-bus-helper.c b/hw/xen/xen-bus-helper.c
index 5a1e12b374..b2b2cc9c5d 100644
--- a/hw/xen/xen-bus-helper.c
+++ b/hw/xen/xen-bus-helper.c
@@ -10,6 +10,7 @@
#include "hw/xen/xen-bus.h"
#include "hw/xen/xen-bus-helper.h"
#include "qapi/error.h"
+#include "trace.h"
#include <glib/gprintf.h>
@@ -46,34 +47,28 @@ const char *xs_strstate(enum xenbus_state state)
return "INVALID";
}
-void xs_node_create(struct xs_handle *xsh, xs_transaction_t tid,
- const char *node, struct xs_permissions perms[],
- unsigned int nr_perms, Error **errp)
+void xs_node_create(struct qemu_xs_handle *h, xs_transaction_t tid,
+ const char *node, unsigned int owner, unsigned int domid,
+ unsigned int perms, Error **errp)
{
trace_xs_node_create(node);
- if (!xs_write(xsh, tid, node, "", 0)) {
+ if (!qemu_xen_xs_create(h, tid, owner, domid, perms, node)) {
error_setg_errno(errp, errno, "failed to create node '%s'", node);
- return;
- }
-
- if (!xs_set_permissions(xsh, tid, node, perms, nr_perms)) {
- error_setg_errno(errp, errno, "failed to set node '%s' permissions",
- node);
}
}
-void xs_node_destroy(struct xs_handle *xsh, xs_transaction_t tid,
+void xs_node_destroy(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, Error **errp)
{
trace_xs_node_destroy(node);
- if (!xs_rm(xsh, tid, node)) {
+ if (!qemu_xen_xs_destroy(h, tid, node)) {
error_setg_errno(errp, errno, "failed to destroy node '%s'", node);
}
}
-void xs_node_vprintf(struct xs_handle *xsh, xs_transaction_t tid,
+void xs_node_vprintf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, va_list ap)
{
@@ -86,7 +81,7 @@ void xs_node_vprintf(struct xs_handle *xsh, xs_transaction_t
tid,
trace_xs_node_vprintf(path, value);
- if (!xs_write(xsh, tid, path, value, len)) {
+ if (!qemu_xen_xs_write(h, tid, path, value, len)) {
error_setg_errno(errp, errno, "failed to write '%s' to '%s'",
value, path);
}
@@ -95,18 +90,18 @@ void xs_node_vprintf(struct xs_handle *xsh,
xs_transaction_t tid,
g_free(path);
}
-void xs_node_printf(struct xs_handle *xsh, xs_transaction_t tid,
+void xs_node_printf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
- xs_node_vprintf(xsh, tid, node, key, errp, fmt, ap);
+ xs_node_vprintf(h, tid, node, key, errp, fmt, ap);
va_end(ap);
}
-int xs_node_vscanf(struct xs_handle *xsh, xs_transaction_t tid,
+int xs_node_vscanf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, va_list ap)
{
@@ -115,7 +110,7 @@ int xs_node_vscanf(struct xs_handle *xsh, xs_transaction_t
tid,
path = (strlen(node) != 0) ? g_strdup_printf("%s/%s", node, key) :
g_strdup(key);
- value = xs_read(xsh, tid, path, NULL);
+ value = qemu_xen_xs_read(h, tid, path, NULL);
trace_xs_node_vscanf(path, value);
@@ -133,7 +128,7 @@ int xs_node_vscanf(struct xs_handle *xsh, xs_transaction_t
tid,
return rc;
}
-int xs_node_scanf(struct xs_handle *xsh, xs_transaction_t tid,
+int xs_node_scanf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, ...)
{
@@ -141,42 +136,35 @@ int xs_node_scanf(struct xs_handle *xsh,
xs_transaction_t tid,
int rc;
va_start(ap, fmt);
- rc = xs_node_vscanf(xsh, tid, node, key, errp, fmt, ap);
+ rc = xs_node_vscanf(h, tid, node, key, errp, fmt, ap);
va_end(ap);
return rc;
}
-void xs_node_watch(struct xs_handle *xsh, const char *node, const char *key,
- char *token, Error **errp)
+struct qemu_xs_watch *xs_node_watch(struct qemu_xs_handle *h, const char *node,
+ const char *key, xs_watch_fn fn,
+ void *opaque, Error **errp)
{
char *path;
+ struct qemu_xs_watch *w;
path = (strlen(node) != 0) ? g_strdup_printf("%s/%s", node, key) :
g_strdup(key);
trace_xs_node_watch(path);
- if (!xs_watch(xsh, path, token)) {
+ w = qemu_xen_xs_watch(h, path, fn, opaque);
+ if (!w) {
error_setg_errno(errp, errno, "failed to watch node '%s'", path);
}
g_free(path);
+
+ return w;
}
-void xs_node_unwatch(struct xs_handle *xsh, const char *node,
- const char *key, const char *token, Error **errp)
+void xs_node_unwatch(struct qemu_xs_handle *h, struct qemu_xs_watch *w)
{
- char *path;
-
- path = (strlen(node) != 0) ? g_strdup_printf("%s/%s", node, key) :
- g_strdup(key);
-
- trace_xs_node_unwatch(path);
-
- if (!xs_unwatch(xsh, path, token)) {
- error_setg_errno(errp, errno, "failed to unwatch node '%s'", path);
- }
-
- g_free(path);
+ qemu_xen_xs_unwatch(h, w);
}
diff --git a/hw/xen/xen-bus.c b/hw/xen/xen-bus.c
index aee6a8c9b0..9fe54967d4 100644
--- a/hw/xen/xen-bus.c
+++ b/hw/xen/xen-bus.c
@@ -62,7 +62,7 @@ static void xen_device_unplug(XenDevice *xendev, Error **errp)
/* Mimic the way the Xen toolstack does an unplug */
again:
- tid = xs_transaction_start(xenbus->xsh);
+ tid = qemu_xen_xs_transaction_start(xenbus->xsh);
if (tid == XBT_NULL) {
error_setg_errno(errp, errno, "failed xs_transaction_start");
return;
@@ -80,7 +80,7 @@ again:
goto abort;
}
- if (!xs_transaction_end(xenbus->xsh, tid, false)) {
+ if (!qemu_xen_xs_transaction_end(xenbus->xsh, tid, false)) {
if (errno == EAGAIN) {
goto again;
}
@@ -95,7 +95,7 @@ abort:
* We only abort if there is already a failure so ignore any error
* from ending the transaction.
*/
- xs_transaction_end(xenbus->xsh, tid, true);
+ qemu_xen_xs_transaction_end(xenbus->xsh, tid, true);
}
static void xen_bus_print_dev(Monitor *mon, DeviceState *dev, int indent)
@@ -111,143 +111,6 @@ static char *xen_bus_get_dev_path(DeviceState *dev)
return xen_device_get_backend_path(XEN_DEVICE(dev));
}
-struct XenWatch {
- char *node, *key;
- char *token;
- XenWatchHandler handler;
- void *opaque;
- Notifier notifier;
-};
-
-static void watch_notify(Notifier *n, void *data)
-{
- XenWatch *watch = container_of(n, XenWatch, notifier);
- const char *token = data;
-
- if (!strcmp(watch->token, token)) {
- watch->handler(watch->opaque);
- }
-}
-
-static XenWatch *new_watch(const char *node, const char *key,
- XenWatchHandler handler, void *opaque)
-{
- XenWatch *watch = g_new0(XenWatch, 1);
- QemuUUID uuid;
-
- qemu_uuid_generate(&uuid);
-
- watch->token = qemu_uuid_unparse_strdup(&uuid);
- watch->node = g_strdup(node);
- watch->key = g_strdup(key);
- watch->handler = handler;
- watch->opaque = opaque;
- watch->notifier.notify = watch_notify;
-
- return watch;
-}
-
-static void free_watch(XenWatch *watch)
-{
- g_free(watch->token);
- g_free(watch->key);
- g_free(watch->node);
-
- g_free(watch);
-}
-
-struct XenWatchList {
- struct xs_handle *xsh;
- NotifierList notifiers;
-};
-
-static void watch_list_event(void *opaque)
-{
- XenWatchList *watch_list = opaque;
- char **v;
- const char *token;
-
- v = xs_check_watch(watch_list->xsh);
- if (!v) {
- return;
- }
-
- token = v[XS_WATCH_TOKEN];
-
- notifier_list_notify(&watch_list->notifiers, (void *)token);
-
- free(v);
-}
-
-static XenWatchList *watch_list_create(struct xs_handle *xsh)
-{
- XenWatchList *watch_list = g_new0(XenWatchList, 1);
-
- g_assert(xsh);
-
- watch_list->xsh = xsh;
- notifier_list_init(&watch_list->notifiers);
- qemu_set_fd_handler(xs_fileno(watch_list->xsh), watch_list_event, NULL,
- watch_list);
-
- return watch_list;
-}
-
-static void watch_list_destroy(XenWatchList *watch_list)
-{
- g_assert(notifier_list_empty(&watch_list->notifiers));
- qemu_set_fd_handler(xs_fileno(watch_list->xsh), NULL, NULL, NULL);
- g_free(watch_list);
-}
-
-static XenWatch *watch_list_add(XenWatchList *watch_list, const char *node,
- const char *key, XenWatchHandler handler,
- void *opaque, Error **errp)
-{
- ERRP_GUARD();
- XenWatch *watch = new_watch(node, key, handler, opaque);
-
- notifier_list_add(&watch_list->notifiers, &watch->notifier);
-
- xs_node_watch(watch_list->xsh, node, key, watch->token, errp);
- if (*errp) {
- notifier_remove(&watch->notifier);
- free_watch(watch);
-
- return NULL;
- }
-
- return watch;
-}
-
-static void watch_list_remove(XenWatchList *watch_list, XenWatch *watch,
- Error **errp)
-{
- xs_node_unwatch(watch_list->xsh, watch->node, watch->key, watch->token,
- errp);
-
- notifier_remove(&watch->notifier);
- free_watch(watch);
-}
-
-static XenWatch *xen_bus_add_watch(XenBus *xenbus, const char *node,
- const char *key, XenWatchHandler handler,
- Error **errp)
-{
- trace_xen_bus_add_watch(node, key);
-
- return watch_list_add(xenbus->watch_list, node, key, handler, xenbus,
- errp);
-}
-
-static void xen_bus_remove_watch(XenBus *xenbus, XenWatch *watch,
- Error **errp)
-{
- trace_xen_bus_remove_watch(watch->node, watch->key);
-
- watch_list_remove(xenbus->watch_list, watch, errp);
-}
-
static void xen_bus_backend_create(XenBus *xenbus, const char *type,
const char *name, char *path,
Error **errp)
@@ -261,15 +124,15 @@ static void xen_bus_backend_create(XenBus *xenbus, const
char *type,
trace_xen_bus_backend_create(type, path);
again:
- tid = xs_transaction_start(xenbus->xsh);
+ tid = qemu_xen_xs_transaction_start(xenbus->xsh);
if (tid == XBT_NULL) {
error_setg(errp, "failed xs_transaction_start");
return;
}
- key = xs_directory(xenbus->xsh, tid, path, &n);
+ key = qemu_xen_xs_directory(xenbus->xsh, tid, path, &n);
if (!key) {
- if (!xs_transaction_end(xenbus->xsh, tid, true)) {
+ if (!qemu_xen_xs_transaction_end(xenbus->xsh, tid, true)) {
error_setg_errno(errp, errno, "failed xs_transaction_end");
}
return;
@@ -300,7 +163,7 @@ again:
free(key);
- if (!xs_transaction_end(xenbus->xsh, tid, false)) {
+ if (!qemu_xen_xs_transaction_end(xenbus->xsh, tid, false)) {
qobject_unref(opts);
if (errno == EAGAIN) {
@@ -327,7 +190,7 @@ static void xen_bus_type_enumerate(XenBus *xenbus, const
char *type)
trace_xen_bus_type_enumerate(type);
- backend = xs_directory(xenbus->xsh, XBT_NULL, domain_path, &n);
+ backend = qemu_xen_xs_directory(xenbus->xsh, XBT_NULL, domain_path, &n);
if (!backend) {
goto out;
}
@@ -372,7 +235,7 @@ static void xen_bus_enumerate(XenBus *xenbus)
trace_xen_bus_enumerate();
- type = xs_directory(xenbus->xsh, XBT_NULL, "backend", &n);
+ type = qemu_xen_xs_directory(xenbus->xsh, XBT_NULL, "backend", &n);
if (!type) {
return;
}
@@ -415,7 +278,7 @@ static void xen_bus_cleanup(XenBus *xenbus)
}
}
-static void xen_bus_backend_changed(void *opaque)
+static void xen_bus_backend_changed(void *opaque, const char *path)
{
XenBus *xenbus = opaque;
@@ -434,7 +297,7 @@ static void xen_bus_unrealize(BusState *bus)
for (i = 0; i < xenbus->backend_types; i++) {
if (xenbus->backend_watch[i]) {
- xen_bus_remove_watch(xenbus, xenbus->backend_watch[i], NULL);
+ xs_node_unwatch(xenbus->xsh, xenbus->backend_watch[i]);
}
}
@@ -442,13 +305,8 @@ static void xen_bus_unrealize(BusState *bus)
xenbus->backend_watch = NULL;
}
- if (xenbus->watch_list) {
- watch_list_destroy(xenbus->watch_list);
- xenbus->watch_list = NULL;
- }
-
if (xenbus->xsh) {
- xs_close(xenbus->xsh);
+ qemu_xen_xs_close(xenbus->xsh);
}
}
@@ -463,7 +321,7 @@ static void xen_bus_realize(BusState *bus, Error **errp)
trace_xen_bus_realize();
- xenbus->xsh = xs_open(0);
+ xenbus->xsh = qemu_xen_xs_open();
if (!xenbus->xsh) {
error_setg_errno(errp, errno, "failed xs_open");
goto fail;
@@ -476,19 +334,18 @@ static void xen_bus_realize(BusState *bus, Error **errp)
xenbus->backend_id = 0; /* Assume lack of node means dom0 */
}
- xenbus->watch_list = watch_list_create(xenbus->xsh);
-
module_call_init(MODULE_INIT_XEN_BACKEND);
type = xen_backend_get_types(&xenbus->backend_types);
- xenbus->backend_watch = g_new(XenWatch *, xenbus->backend_types);
+ xenbus->backend_watch = g_new(struct qemu_xs_watch *,
+ xenbus->backend_types);
for (i = 0; i < xenbus->backend_types; i++) {
char *node = g_strdup_printf("backend/%s", type[i]);
xenbus->backend_watch[i] =
- xen_bus_add_watch(xenbus, node, key, xen_bus_backend_changed,
- &local_err);
+ xs_node_watch(xenbus->xsh, node, key, xen_bus_backend_changed,
+ xenbus, &local_err);
if (local_err) {
/* This need not be treated as a hard error so don't propagate */
error_reportf_err(local_err,
@@ -631,7 +488,7 @@ static bool xen_device_frontend_is_active(XenDevice *xendev)
}
}
-static void xen_device_backend_changed(void *opaque)
+static void xen_device_backend_changed(void *opaque, const char *path)
{
XenDevice *xendev = opaque;
const char *type = object_get_typename(OBJECT(xendev));
@@ -685,66 +542,35 @@ static void xen_device_backend_changed(void *opaque)
}
}
-static XenWatch *xen_device_add_watch(XenDevice *xendev, const char *node,
- const char *key,
- XenWatchHandler handler,
- Error **errp)
-{
- const char *type = object_get_typename(OBJECT(xendev));
-
- trace_xen_device_add_watch(type, xendev->name, node, key);
-
- return watch_list_add(xendev->watch_list, node, key, handler, xendev,
- errp);
-}
-
-static void xen_device_remove_watch(XenDevice *xendev, XenWatch *watch,
- Error **errp)
-{
- const char *type = object_get_typename(OBJECT(xendev));
-
- trace_xen_device_remove_watch(type, xendev->name, watch->node,
- watch->key);
-
- watch_list_remove(xendev->watch_list, watch, errp);
-}
-
-
static void xen_device_backend_create(XenDevice *xendev, Error **errp)
{
ERRP_GUARD();
XenBus *xenbus = XEN_BUS(qdev_get_parent_bus(DEVICE(xendev)));
- struct xs_permissions perms[2];
xendev->backend_path = xen_device_get_backend_path(xendev);
- perms[0].id = xenbus->backend_id;
- perms[0].perms = XS_PERM_NONE;
- perms[1].id = xendev->frontend_id;
- perms[1].perms = XS_PERM_READ;
-
g_assert(xenbus->xsh);
- xs_node_create(xenbus->xsh, XBT_NULL, xendev->backend_path, perms,
- ARRAY_SIZE(perms), errp);
+ xs_node_create(xenbus->xsh, XBT_NULL, xendev->backend_path,
+ xenbus->backend_id, xendev->frontend_id, XS_PERM_READ,
errp);
if (*errp) {
error_prepend(errp, "failed to create backend: ");
return;
}
xendev->backend_state_watch =
- xen_device_add_watch(xendev, xendev->backend_path,
- "state", xen_device_backend_changed,
- errp);
+ xs_node_watch(xendev->xsh, xendev->backend_path,
+ "state", xen_device_backend_changed, xendev,
+ errp);
if (*errp) {
error_prepend(errp, "failed to watch backend state: ");
return;
}
xendev->backend_online_watch =
- xen_device_add_watch(xendev, xendev->backend_path,
- "online", xen_device_backend_changed,
- errp);
+ xs_node_watch(xendev->xsh, xendev->backend_path,
+ "online", xen_device_backend_changed, xendev,
+ errp);
if (*errp) {
error_prepend(errp, "failed to watch backend online: ");
return;
@@ -757,12 +583,12 @@ static void xen_device_backend_destroy(XenDevice *xendev)
Error *local_err = NULL;
if (xendev->backend_online_watch) {
- xen_device_remove_watch(xendev, xendev->backend_online_watch, NULL);
+ xs_node_unwatch(xendev->xsh, xendev->backend_online_watch);
xendev->backend_online_watch = NULL;
}
if (xendev->backend_state_watch) {
- xen_device_remove_watch(xendev, xendev->backend_state_watch, NULL);
+ xs_node_unwatch(xendev->xsh, xendev->backend_state_watch);
xendev->backend_state_watch = NULL;
}
@@ -837,7 +663,7 @@ static void xen_device_frontend_set_state(XenDevice *xendev,
}
}
-static void xen_device_frontend_changed(void *opaque)
+static void xen_device_frontend_changed(void *opaque, const char *path)
{
XenDevice *xendev = opaque;
XenDeviceClass *xendev_class = XEN_DEVICE_GET_CLASS(xendev);
@@ -885,7 +711,6 @@ static void xen_device_frontend_create(XenDevice *xendev,
Error **errp)
{
ERRP_GUARD();
XenBus *xenbus = XEN_BUS(qdev_get_parent_bus(DEVICE(xendev)));
- struct xs_permissions perms[2];
xendev->frontend_path = xen_device_get_frontend_path(xendev);
@@ -894,15 +719,11 @@ static void xen_device_frontend_create(XenDevice *xendev,
Error **errp)
* toolstack.
*/
if (!xen_device_frontend_exists(xendev)) {
- perms[0].id = xendev->frontend_id;
- perms[0].perms = XS_PERM_NONE;
- perms[1].id = xenbus->backend_id;
- perms[1].perms = XS_PERM_READ | XS_PERM_WRITE;
-
g_assert(xenbus->xsh);
- xs_node_create(xenbus->xsh, XBT_NULL, xendev->frontend_path, perms,
- ARRAY_SIZE(perms), errp);
+ xs_node_create(xenbus->xsh, XBT_NULL, xendev->frontend_path,
+ xendev->frontend_id, xenbus->backend_id,
+ XS_PERM_READ | XS_PERM_WRITE, errp);
if (*errp) {
error_prepend(errp, "failed to create frontend: ");
return;
@@ -910,8 +731,8 @@ static void xen_device_frontend_create(XenDevice *xendev,
Error **errp)
}
xendev->frontend_state_watch =
- xen_device_add_watch(xendev, xendev->frontend_path, "state",
- xen_device_frontend_changed, errp);
+ xs_node_watch(xendev->xsh, xendev->frontend_path, "state",
+ xen_device_frontend_changed, xendev, errp);
if (*errp) {
error_prepend(errp, "failed to watch frontend state: ");
}
@@ -923,8 +744,7 @@ static void xen_device_frontend_destroy(XenDevice *xendev)
Error *local_err = NULL;
if (xendev->frontend_state_watch) {
- xen_device_remove_watch(xendev, xendev->frontend_state_watch,
- NULL);
+ xs_node_unwatch(xendev->xsh, xendev->frontend_state_watch);
xendev->frontend_state_watch = NULL;
}
@@ -1146,13 +966,8 @@ static void xen_device_unrealize(DeviceState *dev)
xendev->xgth = NULL;
}
- if (xendev->watch_list) {
- watch_list_destroy(xendev->watch_list);
- xendev->watch_list = NULL;
- }
-
if (xendev->xsh) {
- xs_close(xendev->xsh);
+ qemu_xen_xs_close(xendev->xsh);
xendev->xsh = NULL;
}
@@ -1197,14 +1012,12 @@ static void xen_device_realize(DeviceState *dev, Error
**errp)
trace_xen_device_realize(type, xendev->name);
- xendev->xsh = xs_open(0);
+ xendev->xsh = qemu_xen_xs_open();
if (!xendev->xsh) {
error_setg_errno(errp, errno, "failed xs_open");
goto unrealize;
}
- xendev->watch_list = watch_list_create(xendev->xsh);
-
xendev->xgth = qemu_xen_gnttab_open();
if (!xendev->xgth) {
error_setg_errno(errp, errno, "failed xengnttab_open");
diff --git a/hw/xen/xen-legacy-backend.c b/hw/xen/xen-legacy-backend.c
index a48a25aeb5..4ded3cec23 100644
--- a/hw/xen/xen-legacy-backend.c
+++ b/hw/xen/xen-legacy-backend.c
@@ -39,7 +39,7 @@ BusState *xen_sysbus;
/* ------------------------------------------------------------- */
/* public */
-struct xs_handle *xenstore;
+struct qemu_xs_handle *xenstore;
const char *xen_protocol;
/* private */
@@ -274,6 +274,25 @@ static void xen_be_frontend_changed(struct XenLegacyDevice
*xendev,
}
}
+static void xenstore_update_fe(void *opaque, const char *watch)
+{
+ struct XenLegacyDevice *xendev = opaque;
+ const 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);
+}
+
/* ------------------------------------------------------------- */
/* Check for possible state transitions and perform them. */
@@ -287,7 +306,6 @@ static void xen_be_frontend_changed(struct XenLegacyDevice
*xendev,
*/
static int xen_be_try_setup(struct XenLegacyDevice *xendev)
{
- char token[XEN_BUFSIZE];
int be_state;
if (xenstore_read_be_int(xendev, "state", &be_state) == -1) {
@@ -308,8 +326,9 @@ static int xen_be_try_setup(struct XenLegacyDevice *xendev)
}
/* setup frontend watch */
- snprintf(token, sizeof(token), "fe:%p", xendev);
- if (!xs_watch(xenstore, xendev->fe, token)) {
+ xendev->watch = qemu_xen_xs_watch(xenstore, xendev->fe, xenstore_update_fe,
+ xendev);
+ if (!xendev->watch) {
xen_pv_printf(xendev, 0, "watching frontend path (%s) failed\n",
xendev->fe);
return -1;
@@ -498,46 +517,20 @@ void xen_be_check_state(struct XenLegacyDevice *xendev)
/* ------------------------------------------------------------- */
-static int xenstore_scan(const char *type, int dom, struct XenDevOps *ops)
-{
- struct XenLegacyDevice *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;
-}
+struct xenstore_be {
+ const char *type;
+ int dom;
+ struct XenDevOps *ops;
+};
-void xenstore_update_be(char *watch, char *type, int dom,
- struct XenDevOps *ops)
+static void xenstore_update_be(void *opaque, const char *watch)
{
+ struct xenstore_be *be = opaque;
struct XenLegacyDevice *xendev;
char path[XEN_BUFSIZE], *bepath;
unsigned int len, dev;
- len = snprintf(path, sizeof(path), "backend/%s/%d", type, dom);
+ len = snprintf(path, sizeof(path), "backend/%s/%d", be->type, be->dom);
if (strncmp(path, watch, len) != 0) {
return;
}
@@ -551,9 +544,9 @@ void xenstore_update_be(char *watch, char *type, int dom,
return;
}
- xendev = xen_be_get_xendev(type, dom, dev, ops);
+ xendev = xen_be_get_xendev(be->type, be->dom, dev, be->ops);
if (xendev != NULL) {
- bepath = xs_read(xenstore, 0, xendev->be, &len);
+ bepath = qemu_xen_xs_read(xenstore, 0, xendev->be, &len);
if (bepath == NULL) {
xen_pv_del_xendev(xendev);
} else {
@@ -564,23 +557,41 @@ void xenstore_update_be(char *watch, char *type, int dom,
}
}
-void xenstore_update_fe(char *watch, struct XenLegacyDevice *xendev)
+static int xenstore_scan(const char *type, int dom, struct XenDevOps *ops)
{
- char *node;
- unsigned int len;
+ struct XenLegacyDevice *xendev;
+ char path[XEN_BUFSIZE];
+ struct xenstore_be *be = g_new0(struct xenstore_be, 1);
+ char **dev = NULL;
+ unsigned int cdev, j;
- len = strlen(xendev->fe);
- if (strncmp(xendev->fe, watch, len) != 0) {
- return;
- }
- if (watch[len] != '/') {
- return;
+ /* setup watch */
+ be->type = type;
+ be->dom = dom;
+ be->ops = ops;
+ snprintf(path, sizeof(path), "backend/%s/%d", type, dom);
+ if (!qemu_xen_xs_watch(xenstore, path, xenstore_update_be, be)) {
+ xen_pv_printf(NULL, 0, "xen be: watching backend path (%s) failed\n",
+ path);
+ return -1;
}
- node = watch + len + 1;
- xen_be_frontend_changed(xendev, node);
- xen_be_check_state(xendev);
+ /* look for backends */
+ dev = qemu_xen_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;
}
+
/* -------------------------------------------------------------------- */
static void xen_set_dynamic_sysbus(void)
@@ -594,14 +605,12 @@ static void xen_set_dynamic_sysbus(void)
void xen_be_init(void)
{
- xenstore = xs_daemon_open();
+ xenstore = qemu_xen_xs_open();
if (!xenstore) {
xen_pv_printf(NULL, 0, "can't connect to xenstored\n");
exit(1);
}
- qemu_set_fd_handler(xs_fileno(xenstore), xenstore_update, NULL, NULL);
-
if (xen_evtchn_ops == NULL || xen_gnttab_ops == NULL) {
xen_pv_printf(NULL, 0, "Xen operations not set up\n");
exit(1);
diff --git a/hw/xen/xen-operations.c b/hw/xen/xen-operations.c
index 440e566bb1..abed812b63 100644
--- a/hw/xen/xen-operations.c
+++ b/hw/xen/xen-operations.c
@@ -10,6 +10,7 @@
*/
#include "qemu/osdep.h"
+#include "qemu/uuid.h"
#include "qapi/error.h"
#include "hw/xen/xen_backend_ops.h"
@@ -262,6 +263,202 @@ struct foreignmem_backend_ops
libxenforeignmem_backend_ops = {
.unmap = libxenforeignmem_backend_unmap,
};
+struct qemu_xs_handle {
+ struct xs_handle *xsh;
+ NotifierList notifiers;
+};
+
+static void watch_event(void *opaque)
+{
+ struct qemu_xs_handle *h = opaque;
+
+ for (;;) {
+ char **v = xs_check_watch(h->xsh);
+
+ if (!v) {
+ break;
+ }
+
+ notifier_list_notify(&h->notifiers, v);
+ free(v);
+ }
+}
+
+static struct qemu_xs_handle *libxenstore_open(void)
+{
+ struct xs_handle *xsh = xs_open(0);
+ struct qemu_xs_handle *h = g_new0(struct qemu_xs_handle, 1);
+
+ if (!xsh) {
+ return NULL;
+ }
+
+ h = g_new0(struct qemu_xs_handle, 1);
+ h->xsh = xsh;
+
+ notifier_list_init(&h->notifiers);
+ qemu_set_fd_handler(xs_fileno(h->xsh), watch_event, NULL, h);
+
+ return h;
+}
+
+static void libxenstore_close(struct qemu_xs_handle *h)
+{
+ g_assert(notifier_list_empty(&h->notifiers));
+ qemu_set_fd_handler(xs_fileno(h->xsh), NULL, NULL, NULL);
+ xs_close(h->xsh);
+ g_free(h);
+}
+
+static char *libxenstore_get_domain_path(struct qemu_xs_handle *h,
+ unsigned int domid)
+{
+ return xs_get_domain_path(h->xsh, domid);
+}
+
+static char **libxenstore_directory(struct qemu_xs_handle *h,
+ xs_transaction_t t, const char *path,
+ unsigned int *num)
+{
+ return xs_directory(h->xsh, t, path, num);
+}
+
+static void *libxenstore_read(struct qemu_xs_handle *h, xs_transaction_t t,
+ const char *path, unsigned int *len)
+{
+ return xs_read(h->xsh, t, path, len);
+}
+
+static bool libxenstore_write(struct qemu_xs_handle *h, xs_transaction_t t,
+ const char *path, const void *data,
+ unsigned int len)
+{
+ return xs_write(h->xsh, t, path, data, len);
+}
+
+static bool libxenstore_create(struct qemu_xs_handle *h, xs_transaction_t t,
+ unsigned int owner, unsigned int domid,
+ unsigned int perms, const char *path)
+{
+ struct xs_permissions perms_list[] = {
+ {
+ .id = owner,
+ .perms = XS_PERM_NONE,
+ },
+ {
+ .id = domid,
+ .perms = perms,
+ },
+ };
+
+ if (!xs_mkdir(h->xsh, t, path)) {
+ return false;
+ }
+
+ return xs_set_permissions(h->xsh, t, path, perms_list,
+ ARRAY_SIZE(perms_list));
+}
+
+static bool libxenstore_destroy(struct qemu_xs_handle *h, xs_transaction_t t,
+ const char *path)
+{
+ return xs_rm(h->xsh, t, path);
+}
+
+struct qemu_xs_watch {
+ char *path;
+ char *token;
+ xs_watch_fn fn;
+ void *opaque;
+ Notifier notifier;
+};
+
+static void watch_notify(Notifier *n, void *data)
+{
+ struct qemu_xs_watch *w = container_of(n, struct qemu_xs_watch, notifier);
+ const char **v = data;
+
+ if (!strcmp(w->token, v[XS_WATCH_TOKEN])) {
+ w->fn(w->opaque, v[XS_WATCH_PATH]);
+ }
+}
+
+static struct qemu_xs_watch *new_watch(const char *path, xs_watch_fn fn,
+ void *opaque)
+{
+ struct qemu_xs_watch *w = g_new0(struct qemu_xs_watch, 1);
+ QemuUUID uuid;
+
+ qemu_uuid_generate(&uuid);
+
+ w->token = qemu_uuid_unparse_strdup(&uuid);
+ w->path = g_strdup(path);
+ w->fn = fn;
+ w->opaque = opaque;
+ w->notifier.notify = watch_notify;
+
+ return w;
+}
+
+static void free_watch(struct qemu_xs_watch *w)
+{
+ g_free(w->token);
+ g_free(w->path);
+
+ g_free(w);
+}
+
+static struct qemu_xs_watch *libxenstore_watch(struct qemu_xs_handle *h,
+ const char *path, xs_watch_fn
fn,
+ void *opaque)
+{
+ struct qemu_xs_watch *w = new_watch(path, fn, opaque);
+
+ notifier_list_add(&h->notifiers, &w->notifier);
+
+ if (!xs_watch(h->xsh, path, w->token)) {
+ notifier_remove(&w->notifier);
+ free_watch(w);
+ return NULL;
+ }
+
+ return w;
+}
+
+static void libxenstore_unwatch(struct qemu_xs_handle *h,
+ struct qemu_xs_watch *w)
+{
+ xs_unwatch(h->xsh, w->path, w->token);
+ notifier_remove(&w->notifier);
+ free_watch(w);
+}
+
+static xs_transaction_t libxenstore_transaction_start(struct qemu_xs_handle *h)
+{
+ return xs_transaction_start(h->xsh);
+}
+
+static bool libxenstore_transaction_end(struct qemu_xs_handle *h,
+ xs_transaction_t t, bool abort)
+{
+ return xs_transaction_end(h->xsh, t, abort);
+}
+
+struct xenstore_backend_ops libxenstore_backend_ops = {
+ .open = libxenstore_open,
+ .close = libxenstore_close,
+ .get_domain_path = libxenstore_get_domain_path,
+ .directory = libxenstore_directory,
+ .read = libxenstore_read,
+ .write = libxenstore_write,
+ .create = libxenstore_create,
+ .destroy = libxenstore_destroy,
+ .watch = libxenstore_watch,
+ .unwatch = libxenstore_unwatch,
+ .transaction_start = libxenstore_transaction_start,
+ .transaction_end = libxenstore_transaction_end,
+};
+
void setup_xen_backend_ops(void)
{
#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40800
@@ -277,4 +474,5 @@ void setup_xen_backend_ops(void)
xen_evtchn_ops = &libxenevtchn_backend_ops;
xen_gnttab_ops = &libxengnttab_backend_ops;
xen_foreignmem_ops = &libxenforeignmem_backend_ops;
+ xen_xenstore_ops = &libxenstore_backend_ops;
}
diff --git a/hw/xen/xen_devconfig.c b/hw/xen/xen_devconfig.c
index 46ee4a7f02..9b7304e544 100644
--- a/hw/xen/xen_devconfig.c
+++ b/hw/xen/xen_devconfig.c
@@ -11,11 +11,11 @@ static int xen_config_dev_dirs(const char *ftype, const
char *btype, int vdev,
{
char *dom;
- dom = xs_get_domain_path(xenstore, xen_domid);
+ dom = qemu_xen_xs_get_domain_path(xenstore, xen_domid);
snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev);
free(dom);
- dom = xs_get_domain_path(xenstore, 0);
+ dom = qemu_xen_xs_get_domain_path(xenstore, 0);
snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev);
free(dom);
diff --git a/hw/xen/xen_pt_graphics.c b/hw/xen/xen_pt_graphics.c
index f303f67c9c..0aed3bb6fd 100644
--- a/hw/xen/xen_pt_graphics.c
+++ b/hw/xen/xen_pt_graphics.c
@@ -5,7 +5,6 @@
#include "qapi/error.h"
#include "xen_pt.h"
#include "xen-host-pci-device.h"
-#include "hw/xen/xen-legacy-backend.h"
static unsigned long igd_guest_opregion;
static unsigned long igd_host_opregion;
diff --git a/hw/xen/xen_pvdev.c b/hw/xen/xen_pvdev.c
index d8582cc74c..be1504b82c 100644
--- a/hw/xen/xen_pvdev.c
+++ b/hw/xen/xen_pvdev.c
@@ -54,31 +54,17 @@ void xen_config_cleanup(void)
struct xs_dirs *d;
QTAILQ_FOREACH(d, &xs_cleanup, list) {
- xs_rm(xenstore, 0, d->xs_dir);
+ qemu_xen_xs_destroy(xenstore, 0, d->xs_dir);
}
}
int xenstore_mkdir(char *path, int p)
{
- struct xs_permissions perms[2] = {
- {
- .id = 0, /* set owner: dom0 */
- }, {
- .id = xen_domid,
- .perms = p,
- }
- };
-
- if (!xs_mkdir(xenstore, 0, path)) {
+ if (!qemu_xen_xs_create(xenstore, 0, 0, xen_domid, p, path)) {
xen_pv_printf(NULL, 0, "xs_mkdir %s: failed\n", path);
return -1;
}
xenstore_cleanup_dir(g_strdup(path));
-
- if (!xs_set_permissions(xenstore, 0, path, perms, 2)) {
- xen_pv_printf(NULL, 0, "xs_set_permissions %s: failed\n", path);
- return -1;
- }
return 0;
}
@@ -87,7 +73,7 @@ int xenstore_write_str(const char *base, const char *node,
const char *val)
char abspath[XEN_BUFSIZE];
snprintf(abspath, sizeof(abspath), "%s/%s", base, node);
- if (!xs_write(xenstore, 0, abspath, val, strlen(val))) {
+ if (!qemu_xen_xs_write(xenstore, 0, abspath, val, strlen(val))) {
return -1;
}
return 0;
@@ -100,7 +86,7 @@ char *xenstore_read_str(const char *base, const char *node)
char *str, *ret = NULL;
snprintf(abspath, sizeof(abspath), "%s/%s", base, node);
- str = xs_read(xenstore, 0, abspath, &len);
+ str = qemu_xen_xs_read(xenstore, 0, abspath, &len);
if (str != NULL) {
/* move to qemu-allocated memory to make sure
* callers can savely g_free() stuff. */
@@ -152,29 +138,6 @@ int xenstore_read_uint64(const char *base, const char
*node, uint64_t *uval)
return rc;
}
-void xenstore_update(void *unused)
-{
- char **vec = NULL;
- intptr_t type, ops, ptr;
- unsigned int dom, count;
-
- vec = xs_read_watch(xenstore, &count);
- if (vec == NULL) {
- goto cleanup;
- }
-
- if (sscanf(vec[XS_WATCH_TOKEN], "be:%" PRIxPTR ":%d:%" PRIxPTR,
- &type, &dom, &ops) == 3) {
- xenstore_update_be(vec[XS_WATCH_PATH], (void *)type, dom, (void*)ops);
- }
- if (sscanf(vec[XS_WATCH_TOKEN], "fe:%" PRIxPTR, &ptr) == 1) {
- xenstore_update_fe(vec[XS_WATCH_PATH], (void *)ptr);
- }
-
-cleanup:
- free(vec);
-}
-
const char *xenbus_strstate(enum xenbus_state state)
{
static const char *const name[] = {
@@ -299,9 +262,7 @@ void xen_pv_del_xendev(struct XenLegacyDevice *xendev)
}
if (xendev->fe) {
- char token[XEN_BUFSIZE];
- snprintf(token, sizeof(token), "fe:%p", xendev);
- xs_unwatch(xenstore, xendev->fe, token);
+ qemu_xen_xs_unwatch(xenstore, xendev->watch);
g_free(xendev->fe);
}
diff --git a/include/hw/xen/xen-bus-helper.h b/include/hw/xen/xen-bus-helper.h
index 8782f30550..d8dcc2f010 100644
--- a/include/hw/xen/xen-bus-helper.h
+++ b/include/hw/xen/xen-bus-helper.h
@@ -8,40 +8,40 @@
#ifndef HW_XEN_BUS_HELPER_H
#define HW_XEN_BUS_HELPER_H
-#include "hw/xen/xen_common.h"
+#include "hw/xen/xen_backend_ops.h"
const char *xs_strstate(enum xenbus_state state);
-void xs_node_create(struct xs_handle *xsh, xs_transaction_t tid,
- const char *node, struct xs_permissions perms[],
- unsigned int nr_perms, Error **errp);
-void xs_node_destroy(struct xs_handle *xsh, xs_transaction_t tid,
+void xs_node_create(struct qemu_xs_handle *h, xs_transaction_t tid,
+ const char *node, unsigned int owner, unsigned int domid,
+ unsigned int perms, Error **errp);
+void xs_node_destroy(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, Error **errp);
/* Write to node/key unless node is empty, in which case write to key */
-void xs_node_vprintf(struct xs_handle *xsh, xs_transaction_t tid,
+void xs_node_vprintf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, va_list ap)
G_GNUC_PRINTF(6, 0);
-void xs_node_printf(struct xs_handle *xsh, xs_transaction_t tid,
+void xs_node_printf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, ...)
G_GNUC_PRINTF(6, 7);
/* Read from node/key unless node is empty, in which case read from key */
-int xs_node_vscanf(struct xs_handle *xsh, xs_transaction_t tid,
+int xs_node_vscanf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, va_list ap)
G_GNUC_SCANF(6, 0);
-int xs_node_scanf(struct xs_handle *xsh, xs_transaction_t tid,
+int xs_node_scanf(struct qemu_xs_handle *h, xs_transaction_t tid,
const char *node, const char *key, Error **errp,
const char *fmt, ...)
G_GNUC_SCANF(6, 7);
/* Watch node/key unless node is empty, in which case watch key */
-void xs_node_watch(struct xs_handle *xsh, const char *node, const char *key,
- char *token, Error **errp);
-void xs_node_unwatch(struct xs_handle *xsh, const char *node, const char *key,
- const char *token, Error **errp);
+struct qemu_xs_watch *xs_node_watch(struct qemu_xs_handle *h, const char *node,
+ const char *key, xs_watch_fn fn,
+ void *opaque, Error **errp);
+void xs_node_unwatch(struct qemu_xs_handle *h, struct qemu_xs_watch *w);
#endif /* HW_XEN_BUS_HELPER_H */
diff --git a/include/hw/xen/xen-bus.h b/include/hw/xen/xen-bus.h
index 5a90e79d53..f435898164 100644
--- a/include/hw/xen/xen-bus.h
+++ b/include/hw/xen/xen-bus.h
@@ -9,29 +9,23 @@
#define HW_XEN_BUS_H
#include "hw/xen/xen_backend_ops.h"
-#include "hw/xen/interface/io/xenbus.h"
#include "hw/sysbus.h"
#include "qemu/notify.h"
#include "qom/object.h"
-typedef void (*XenWatchHandler)(void *opaque);
-
-typedef struct XenWatchList XenWatchList;
-typedef struct XenWatch XenWatch;
typedef struct XenEventChannel XenEventChannel;
struct XenDevice {
DeviceState qdev;
domid_t frontend_id;
char *name;
- struct xs_handle *xsh;
- XenWatchList *watch_list;
+ struct qemu_xs_handle *xsh;
char *backend_path, *frontend_path;
enum xenbus_state backend_state, frontend_state;
Notifier exit;
- XenWatch *backend_state_watch, *frontend_state_watch;
+ struct qemu_xs_watch *backend_state_watch, *frontend_state_watch;
bool backend_online;
- XenWatch *backend_online_watch;
+ struct qemu_xs_watch *backend_online_watch;
xengnttab_handle *xgth;
bool inactive;
QLIST_HEAD(, XenEventChannel) event_channels;
@@ -64,10 +58,9 @@ OBJECT_DECLARE_TYPE(XenDevice, XenDeviceClass, XEN_DEVICE)
struct XenBus {
BusState qbus;
domid_t backend_id;
- struct xs_handle *xsh;
- XenWatchList *watch_list;
+ struct qemu_xs_handle *xsh;
unsigned int backend_types;
- XenWatch **backend_watch;
+ struct qemu_xs_watch **backend_watch;
QLIST_HEAD(, XenDevice) inactive_devices;
};
diff --git a/include/hw/xen/xen-legacy-backend.h
b/include/hw/xen/xen-legacy-backend.h
index ab28583267..6c307c5f2c 100644
--- a/include/hw/xen/xen-legacy-backend.h
+++ b/include/hw/xen/xen-legacy-backend.h
@@ -2,7 +2,6 @@
#define HW_XEN_LEGACY_BACKEND_H
#include "hw/xen/xen_backend_ops.h"
-#include "hw/xen/interface/io/xenbus.h"
#include "hw/xen/xen_pvdev.h"
#include "net/net.h"
#include "qom/object.h"
@@ -16,7 +15,7 @@ DECLARE_INSTANCE_CHECKER(XenLegacyDevice, XENBACKEND,
TYPE_XENBACKEND)
/* variables */
-extern struct xs_handle *xenstore;
+extern struct qemu_xs_handle *xenstore;
extern const char *xen_protocol;
extern DeviceState *xen_sysdev;
extern BusState *xen_sysbus;
@@ -31,9 +30,6 @@ int xenstore_write_be_int64(struct XenLegacyDevice *xendev,
const char *node,
char *xenstore_read_be_str(struct XenLegacyDevice *xendev, const char *node);
int xenstore_read_be_int(struct XenLegacyDevice *xendev, const char *node,
int *ival);
-void xenstore_update_fe(char *watch, struct XenLegacyDevice *xendev);
-void xenstore_update_be(char *watch, char *type, int dom,
- struct XenDevOps *ops);
char *xenstore_read_fe_str(struct XenLegacyDevice *xendev, const char *node);
int xenstore_read_fe_int(struct XenLegacyDevice *xendev, const char *node,
int *ival);
diff --git a/include/hw/xen/xen_backend_ops.h b/include/hw/xen/xen_backend_ops.h
index 0dff06bbde..90cca85f52 100644
--- a/include/hw/xen/xen_backend_ops.h
+++ b/include/hw/xen/xen_backend_ops.h
@@ -12,6 +12,10 @@
#ifndef QEMU_XEN_BACKEND_OPS_H
#define QEMU_XEN_BACKEND_OPS_H
+#include "hw/xen/xen.h"
+#include "hw/xen/interface/xen.h"
+#include "hw/xen/interface/io/xenbus.h"
+
/*
* For the time being, these operations map fairly closely to the API of
* the actual Xen libraries, e.g. libxenevtchn. As we complete the migration
@@ -36,6 +40,16 @@ typedef uint32_t grant_ref_t;
#define XEN_PAGE_SIZE (1UL << XEN_PAGE_SHIFT)
#define XEN_PAGE_MASK (~(XEN_PAGE_SIZE - 1))
+#ifndef xen_rmb
+#define xen_rmb() smp_rmb()
+#endif
+#ifndef xen_wmb
+#define xen_wmb() smp_wmb()
+#endif
+#ifndef xen_mb
+#define xen_mb() smp_mb()
+#endif
+
struct evtchn_backend_ops {
xenevtchn_handle *(*open)(void);
int (*bind_interdomain)(xenevtchn_handle *xc, uint32_t domid,
@@ -240,6 +254,155 @@ static inline int qemu_xen_foreignmem_unmap(void *addr,
size_t pages)
return xen_foreignmem_ops->unmap(addr, pages);
}
+typedef void (*xs_watch_fn)(void *opaque, const char *path);
+
+struct qemu_xs_handle;
+struct qemu_xs_watch;
+typedef uint32_t xs_transaction_t;
+
+#define XBT_NULL 0
+
+#define XS_PERM_NONE 0x00
+#define XS_PERM_READ 0x01
+#define XS_PERM_WRITE 0x02
+
+struct xenstore_backend_ops {
+ struct qemu_xs_handle *(*open)(void);
+ void (*close)(struct qemu_xs_handle *h);
+ char *(*get_domain_path)(struct qemu_xs_handle *h, unsigned int domid);
+ char **(*directory)(struct qemu_xs_handle *h, xs_transaction_t t,
+ const char *path, unsigned int *num);
+ void *(*read)(struct qemu_xs_handle *h, xs_transaction_t t,
+ const char *path, unsigned int *len);
+ bool (*write)(struct qemu_xs_handle *h, xs_transaction_t t,
+ const char *path, const void *data, unsigned int len);
+ bool (*create)(struct qemu_xs_handle *h, xs_transaction_t t,
+ unsigned int owner, unsigned int domid,
+ unsigned int perms, const char *path);
+ bool (*destroy)(struct qemu_xs_handle *h, xs_transaction_t t,
+ const char *path);
+ struct qemu_xs_watch *(*watch)(struct qemu_xs_handle *h, const char *path,
+ xs_watch_fn fn, void *opaque);
+ void (*unwatch)(struct qemu_xs_handle *h, struct qemu_xs_watch *w);
+ xs_transaction_t (*transaction_start)(struct qemu_xs_handle *h);
+ bool (*transaction_end)(struct qemu_xs_handle *h, xs_transaction_t t,
+ bool abort);
+};
+
+extern struct xenstore_backend_ops *xen_xenstore_ops;
+
+static inline struct qemu_xs_handle *qemu_xen_xs_open(void)
+{
+ if (!xen_xenstore_ops) {
+ return NULL;
+ }
+ return xen_xenstore_ops->open();
+}
+
+static inline void qemu_xen_xs_close(struct qemu_xs_handle *h)
+{
+ if (!xen_xenstore_ops) {
+ return;
+ }
+ xen_xenstore_ops->close(h);
+}
+
+static inline char *qemu_xen_xs_get_domain_path(struct qemu_xs_handle *h,
+ unsigned int domid)
+{
+ if (!xen_xenstore_ops) {
+ return NULL;
+ }
+ return xen_xenstore_ops->get_domain_path(h, domid);
+}
+
+static inline char **qemu_xen_xs_directory(struct qemu_xs_handle *h,
+ xs_transaction_t t, const char
*path,
+ unsigned int *num)
+{
+ if (!xen_xenstore_ops) {
+ return NULL;
+ }
+ return xen_xenstore_ops->directory(h, t, path, num);
+}
+
+static inline void *qemu_xen_xs_read(struct qemu_xs_handle *h,
+ xs_transaction_t t, const char *path,
+ unsigned int *len)
+{
+ if (!xen_xenstore_ops) {
+ return NULL;
+ }
+ return xen_xenstore_ops->read(h, t, path, len);
+}
+
+static inline bool qemu_xen_xs_write(struct qemu_xs_handle *h,
+ xs_transaction_t t, const char *path,
+ const void *data, unsigned int len)
+{
+ if (!xen_xenstore_ops) {
+ return false;
+ }
+ return xen_xenstore_ops->write(h, t, path, data, len);
+}
+
+static inline bool qemu_xen_xs_create(struct qemu_xs_handle *h,
+ xs_transaction_t t, unsigned int owner,
+ unsigned int domid, unsigned int perms,
+ const char *path)
+{
+ if (!xen_xenstore_ops) {
+ return false;
+ }
+ return xen_xenstore_ops->create(h, t, owner, domid, perms, path);
+}
+
+static inline bool qemu_xen_xs_destroy(struct qemu_xs_handle *h,
+ xs_transaction_t t, const char *path)
+{
+ if (!xen_xenstore_ops) {
+ return false;
+ }
+ return xen_xenstore_ops->destroy(h, t, path);
+}
+
+static inline struct qemu_xs_watch *qemu_xen_xs_watch(struct qemu_xs_handle *h,
+ const char *path,
+ xs_watch_fn fn,
+ void *opaque)
+{
+ if (!xen_xenstore_ops) {
+ return NULL;
+ }
+ return xen_xenstore_ops->watch(h, path, fn, opaque);
+}
+
+static inline void qemu_xen_xs_unwatch(struct qemu_xs_handle *h,
+ struct qemu_xs_watch *w)
+{
+ if (!xen_xenstore_ops) {
+ return;
+ }
+ xen_xenstore_ops->unwatch(h, w);
+}
+
+static inline xs_transaction_t qemu_xen_xs_transaction_start(struct
qemu_xs_handle *h)
+{
+ if (!xen_xenstore_ops) {
+ return XBT_NULL;
+ }
+ return xen_xenstore_ops->transaction_start(h);
+}
+
+static inline bool qemu_xen_xs_transaction_end(struct qemu_xs_handle *h,
+ xs_transaction_t t, bool abort)
+{
+ if (!xen_xenstore_ops) {
+ return false;
+ }
+ return xen_xenstore_ops->transaction_end(h, t, abort);
+}
+
void setup_xen_backend_ops(void);
#endif /* QEMU_XEN_BACKEND_OPS_H */
diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h
index 632ce617cc..7edcf3eb25 100644
--- a/include/hw/xen/xen_common.h
+++ b/include/hw/xen/xen_common.h
@@ -12,7 +12,6 @@
#include <xenctrl.h>
#include <xenstore.h>
-#include "hw/xen/interface/io/xenbus.h"
#include "hw/xen/xen.h"
#include "hw/pci/pci_device.h"
diff --git a/include/hw/xen/xen_pvdev.h b/include/hw/xen/xen_pvdev.h
index 9c27b14764..d8eea353b8 100644
--- a/include/hw/xen/xen_pvdev.h
+++ b/include/hw/xen/xen_pvdev.h
@@ -39,6 +39,7 @@ struct XenLegacyDevice {
char name[64];
int debug;
+ struct qemu_xs_watch *watch;
enum xenbus_state be_state;
enum xenbus_state fe_state;
int online;
@@ -64,7 +65,6 @@ int xenstore_write_int64(const char *base, const char *node,
int64_t ival);
char *xenstore_read_str(const char *base, const char *node);
int xenstore_read_int(const char *base, const char *node, int *ival);
int xenstore_read_uint64(const char *base, const char *node, uint64_t *uval);
-void xenstore_update(void *unused);
const char *xenbus_strstate(enum xenbus_state state);
diff --git a/softmmu/globals.c b/softmmu/globals.c
index dda32986f7..39678aa8c5 100644
--- a/softmmu/globals.c
+++ b/softmmu/globals.c
@@ -68,3 +68,4 @@ bool xen_domid_restrict;
struct evtchn_backend_ops *xen_evtchn_ops;
struct gnttab_backend_ops *xen_gnttab_ops;
struct foreignmem_backend_ops *xen_foreignmem_ops;
+struct xenstore_backend_ops *xen_xenstore_ops;
--
2.39.0
- [PATCH v2 00/27] Enable PV backends with Xen/KVM emulation, David Woodhouse, 2023/03/07
- [PATCH v2 24/27] hw/xen: Implement soft reset for emulated gnttab, David Woodhouse, 2023/03/07
- [PATCH v2 19/27] hw/xen: Only advertise ring-page-order for xen-block if gnttab supports it, David Woodhouse, 2023/03/07
- [PATCH v2 02/27] hw/xen: Add basic XenStore tree walk and write/read/directory support, David Woodhouse, 2023/03/07
- [PATCH v2 25/27] i386/xen: Initialize Xen backends from pc_basic_device_init() for emulation, David Woodhouse, 2023/03/07
- [PATCH v2 12/27] hw/xen: Add foreignmem operations to allow redirection to internal emulation, David Woodhouse, 2023/03/07
- [PATCH v2 01/27] hw/xen: Add xenstore wire implementation and implementation stubs, David Woodhouse, 2023/03/07
- [PATCH v2 16/27] hw/xen: Rename xen_common.h to xen_native.h, David Woodhouse, 2023/03/07
- [PATCH v2 08/27] hw/xen: Create initial XenStore nodes, David Woodhouse, 2023/03/07
- [PATCH v2 13/27] hw/xen: Add xenstore operations to allow redirection to internal emulation,
David Woodhouse <=
- [PATCH v2 26/27] MAINTAINERS: Add entry for Xen on KVM emulation, David Woodhouse, 2023/03/07
- [PATCH v2 27/27] docs: Update Xen-on-KVM documentation for PV disk support, David Woodhouse, 2023/03/07
- [PATCH v2 04/27] hw/xen: Implement XenStore transactions, David Woodhouse, 2023/03/07
- [PATCH v2 23/27] hw/xen: Map guest XENSTORE_PFN grant in emulated Xenstore, David Woodhouse, 2023/03/07
- [PATCH v2 09/27] hw/xen: Add evtchn operations to allow redirection to internal emulation, David Woodhouse, 2023/03/07