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[RFC PATCH v11bis 08/26] hw/xen: Create initial XenStore nodes
From: |
David Woodhouse |
Subject: |
[RFC PATCH v11bis 08/26] hw/xen: Create initial XenStore nodes |
Date: |
Thu, 16 Feb 2023 09:44:18 +0000 |
From: Paul Durrant <pdurrant@amazon.com>
Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
hw/i386/kvm/xen_xenstore.c | 70 ++++++++++++++++++++++++++++++++++++++
1 file changed, 70 insertions(+)
diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c
index d15eea76c4..ff39137846 100644
--- a/hw/i386/kvm/xen_xenstore.c
+++ b/hw/i386/kvm/xen_xenstore.c
@@ -76,9 +76,39 @@ struct XenXenstoreState *xen_xenstore_singleton;
static void xen_xenstore_event(void *opaque);
static void fire_watch_cb(void *opaque, const char *path, const char *token);
+static void G_GNUC_PRINTF (4, 5) relpath_printf(XenXenstoreState *s,
+ GList *perms,
+ const char *relpath,
+ const char *fmt, ...)
+{
+ gchar *abspath;
+ gchar *value;
+ va_list args;
+ GByteArray *data;
+ int err;
+
+ abspath = g_strdup_printf("/local/domain/%u/%s", xen_domid, relpath);
+ va_start(args, fmt);
+ value = g_strdup_vprintf(fmt, args);
+ va_end(args);
+
+ data = g_byte_array_new_take((void *)value, strlen(value));
+
+ err = xs_impl_write(s->impl, DOMID_QEMU, XBT_NULL, abspath, data);
+ assert(!err);
+
+ g_byte_array_unref(data);
+
+ err = xs_impl_set_perms(s->impl, DOMID_QEMU, XBT_NULL, abspath, perms);
+ assert(!err);
+
+ g_free(abspath);
+}
+
static void xen_xenstore_realize(DeviceState *dev, Error **errp)
{
XenXenstoreState *s = XEN_XENSTORE(dev);
+ GList *perms;
if (xen_mode != XEN_EMULATE) {
error_setg(errp, "Xen xenstore support is for Xen emulation");
@@ -102,6 +132,46 @@ static void xen_xenstore_realize(DeviceState *dev, Error
**errp)
xen_xenstore_event, NULL, NULL, NULL, s);
s->impl = xs_impl_create(xen_domid);
+
+ /* Populate the default nodes */
+
+ /* Nodes owned by 'dom0' but readable by the guest */
+ perms = g_list_append(NULL, xs_perm_as_string(XS_PERM_NONE, DOMID_QEMU));
+ perms = g_list_append(perms, xs_perm_as_string(XS_PERM_READ, xen_domid));
+
+ relpath_printf(s, perms, "", "%s", "");
+
+ relpath_printf(s, perms, "domid", "%u", xen_domid);
+
+ relpath_printf(s, perms, "control/platform-feature-xs_reset_watches",
"%u", 1);
+ relpath_printf(s, perms,
"control/platform-feature-multiprocessor-suspend", "%u", 1);
+
+ relpath_printf(s, perms, "platform/acpi", "%u", 1);
+ relpath_printf(s, perms, "platform/acpi_s3", "%u", 1);
+ relpath_printf(s, perms, "platform/acpi_s4", "%u", 1);
+ relpath_printf(s, perms, "platform/acpi_laptop_slate", "%u", 0);
+
+ g_list_free_full(perms, g_free);
+
+ /* Nodes owned by the guest */
+ perms = g_list_append(NULL, xs_perm_as_string(XS_PERM_NONE, xen_domid));
+
+ relpath_printf(s, perms, "attr", "%s", "");
+
+ relpath_printf(s, perms, "control/shutdown", "%s", "");
+ relpath_printf(s, perms, "control/feature-poweroff", "%u", 1);
+ relpath_printf(s, perms, "control/feature-reboot", "%u", 1);
+ relpath_printf(s, perms, "control/feature-suspend", "%u", 1);
+ relpath_printf(s, perms, "control/feature-s3", "%u", 1);
+ relpath_printf(s, perms, "control/feature-s4", "%u", 1);
+
+ relpath_printf(s, perms, "data", "%s", "");
+ relpath_printf(s, perms, "device", "%s", "");
+ relpath_printf(s, perms, "drivers", "%s", "");
+ relpath_printf(s, perms, "error", "%s", "");
+ relpath_printf(s, perms, "feature", "%s", "");
+
+ g_list_free_full(perms, g_free);
}
static bool xen_xenstore_is_needed(void *opaque)
--
2.39.0
- [RFC PATCH v11bis 14/26] hw/xen: Move xenstore_store_pv_console_info to xen_console.c, (continued)
- [RFC PATCH v11bis 14/26] hw/xen: Move xenstore_store_pv_console_info to xen_console.c, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 04/26] hw/xen: Implement XenStore transactions, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 26/26] i386/xen: Initialize Xen backends from pc_basic_device_init() for emulation, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 06/26] xenstore perms WIP, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 03/26] hw/xen: Implement XenStore watches, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 22/26] hw/xen: Add emulated implementation of XenStore operations, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 02/26] hw/xen: Add basic XenStore tree walk and write/read/directory support, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 05/26] hw/xen: Watches on XenStore transactions, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 10/26] hw/xen: Add gnttab operations to allow redirection to internal emulation, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 09/26] hw/xen: Add evtchn operations to allow redirection to internal emulation, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 08/26] hw/xen: Create initial XenStore nodes,
David Woodhouse <=
- [RFC PATCH v11bis 01/26] hw/xen: Add xenstore wire implementation and implementation stubs, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 13/26] hw/xen: Add xenstore operations to allow redirection to internal emulation, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 16/26] hw/xen: Rename xen_common.h to xen_native.h, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 20/26] hw/xen: Hook up emulated implementation for event channel operations, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 12/26] hw/xen: Add foreignmem operations to allow redirection to internal emulation, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 11/26] hw/xen: Pass grant ref to gnttab unmap operation, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 07/26] hw/xen: Implement core serialize/deserialize methods for xenstore_impl, David Woodhouse, 2023/02/16
- Re: [RFC PATCH v11bis 00/26] Emulated XenStore and PV backend support, Juan Quintela, 2023/02/16