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/*
* QEMU XenStore XsNode testing
*
* Copyright © 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/module.h"
static int nr_xs_nodes;
static GList *xs_node_list;
#define XS_NODE_UNIT_TEST
/*
* We don't need the core Xen definitions. And we *do* want to be able
* to run the unit tests even on architectures that Xen doesn't support
* (because life's too short to bother doing otherwise, and test coverage
* doesn't hurt).
*/
#define __XEN_PUBLIC_XEN_H__
#include "hw/i386/kvm/xenstore_impl.c"
#define DOMID_QEMU 0
#define DOMID_GUEST 1
/* This doesn't happen in qemu but we want to make valgrind happy */
static void xs_impl_delete(XenstoreImplState *s)
{
int err;
err = xs_impl_rm(s, DOMID_QEMU, XBT_NULL, "/local");
g_assert(!err);
g_assert(s->nr_nodes == 1);
xs_node_unref(s->root);
g_free(s);
if (xs_node_list) {
GList *l;
for (l = xs_node_list; l; l = l->next) {
XsNode *n = l->data;
printf("Remaining node at %p name %s ref %u\n", n, n->name,
n->ref);
}
}
g_assert(!nr_xs_nodes);
}
static int write_str(XenstoreImplState *s, unsigned int dom_id,
unsigned int tx_id, const char *path,
const char *content)
{
GByteArray *d = g_byte_array_new();
int err;
g_byte_array_append(d, (void *)content, strlen(content));
err = xs_impl_write(s, dom_id, tx_id, path, d);
g_byte_array_unref(d);
return err;
}
static XenstoreImplState *setup(void)
{
XenstoreImplState *s = xs_impl_create();
char *abspath;
int err;
abspath = g_strdup_printf("/local/domain/%u", DOMID_GUEST);
err = write_str(s, DOMID_QEMU, XBT_NULL, abspath, "");
g_assert(!err);
g_free(abspath);
abspath = g_strdup_printf("/local/domain/%u/some", DOMID_GUEST);
err = write_str(s, DOMID_QEMU, XBT_NULL, abspath, "");
g_assert(!err);
g_assert(s->nr_nodes == 5);
g_free(abspath);
return s;
}
static void test_xs_node_simple(void)
{
GByteArray *data = g_byte_array_new();
XenstoreImplState *s = setup();
GList *items = NULL;
XsNode *old_root;
uint64_t gencnt;
int err;
g_assert(s);
/* Read gives ENOENT when it should */
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "foo", data);
g_assert(err == ENOENT);
/* Write works */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/relative/path",
"something");
g_assert(s->nr_nodes == 7);
g_assert(!err);
/* Read gives back what we wrote */
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "some/relative/path", data);
g_assert(!err);
g_assert(data->len == strlen("something"));
g_assert(!memcmp(data->data, "something", data->len));
/* Even if we use an abolute path */
g_byte_array_set_size(data, 0);
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL,
"/local/domain/1/some/relative/path", data);
g_assert(!err);
g_assert(data->len == strlen("something"));
/* Keep a copy, to force COW mode */
old_root = xs_node_ref(s->root);
/* Write works again */
err = write_str(s, DOMID_GUEST, XBT_NULL,
"/local/domain/1/some/relative/path2",
"something else");
g_assert(!err);
g_assert(s->nr_nodes == 8);
/* Overwrite an existing node */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/relative/path",
"another thing");
g_assert(!err);
g_assert(s->nr_nodes == 8);
/* We can list the two files we wrote */
err = xs_impl_directory(s, DOMID_GUEST, XBT_NULL, "some/relative", &gencnt,
&items);
g_assert(!err);
g_assert(items);
g_assert(gencnt == 2);
g_assert(!strcmp(items->data, "path"));
g_assert(items->next);
g_assert(!strcmp(items->next->data, "path2"));
g_assert(!items->next->next);
g_list_free_full(items, g_free);
/* Write somewhere else which already existed */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/relative", "moredata");
g_assert(!err);
g_byte_array_set_size(data, 0);
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "some/relative", data);
g_assert(!err);
g_assert(data->len == strlen("moredata"));
g_assert(!memcmp(data->data, "moredata", data->len));
/* Overwrite existing data */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/relative", "otherdata");
g_assert(!err);
g_byte_array_set_size(data, 0);
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "some/relative", data);
g_assert(!err);
g_assert(data->len == strlen("otherdata"));
g_assert(!memcmp(data->data, "otherdata", data->len));
/* Remove the subtree */
err = xs_impl_rm(s, DOMID_GUEST, XBT_NULL, "some/relative");
g_assert(!err);
g_assert(s->nr_nodes == 5);
g_byte_array_set_size(data, 0);
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "some/relative", data);
g_assert(err == ENOENT);
g_byte_array_unref(data);
xs_node_unref(old_root);
xs_impl_delete(s);
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
module_call_init(MODULE_INIT_QOM);
g_test_add_func("/xs_node/simple", test_xs_node_simple);
return g_test_run();
}
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