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qemu-e2k/tests/unit/test-xs-node.c
David Woodhouse 15e283c5b6 hw/xen: Add foreignmem operations to allow redirection to internal emulation 
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
2023-03-07 17:04:30 +00:00

872 lines
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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__
typedef unsigned long xen_pfn_t;
#include "hw/i386/kvm/xenstore_impl.c"
#define DOMID_QEMU 0
#define DOMID_GUEST 1
static void dump_ref(const char *name, XsNode *n, int indent)
{
int i;
if (!indent && name) {
printf("%s:\n", name);
}
for (i = 0; i < indent; i++) {
printf(" ");
}
printf("->%p(%d, '%s'): '%.*s'%s%s\n", n, n->ref, n->name,
(int)(n->content ? n->content->len : strlen("<empty>")),
n->content ? (char *)n->content->data : "<empty>",
n->modified_in_tx ? " MODIFIED" : "",
n->deleted_in_tx ? " DELETED" : "");
if (n->children) {
g_hash_table_foreach(n->children, (void *)dump_ref,
GINT_TO_POINTER(indent + 2));
}
}
/* This doesn't happen in qemu but we want to make valgrind happy */
static void xs_impl_delete(XenstoreImplState *s, bool last)
{
int err;
xs_impl_reset_watches(s, DOMID_GUEST);
g_assert(!s->nr_domu_watches);
err = xs_impl_rm(s, DOMID_QEMU, XBT_NULL, "/local");
g_assert(!err);
g_assert(s->nr_nodes == 1);
g_hash_table_unref(s->watches);
g_hash_table_unref(s->transactions);
xs_node_unref(s->root);
g_free(s);
if (!last) {
return;
}
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);
}
struct compare_walk {
char path[XENSTORE_ABS_PATH_MAX + 1];
XsNode *parent_2;
bool compare_ok;
};
static bool compare_perms(GList *p1, GList *p2)
{
while (p1) {
if (!p2 || g_strcmp0(p1->data, p2->data)) {
return false;
}
p1 = p1->next;
p2 = p2->next;
}
return (p2 == NULL);
}
static bool compare_content(GByteArray *c1, GByteArray *c2)
{
size_t len1 = 0, len2 = 0;
if (c1) {
len1 = c1->len;
}
if (c2) {
len2 = c2->len;
}
if (len1 != len2) {
return false;
}
if (!len1) {
return true;
}
return !memcmp(c1->data, c2->data, len1);
}
static void compare_child(gpointer, gpointer, gpointer);
static void compare_nodes(struct compare_walk *cw, XsNode *n1, XsNode *n2)
{
int nr_children1 = 0, nr_children2 = 0;
if (n1->children) {
nr_children1 = g_hash_table_size(n1->children);
}
if (n2->children) {
nr_children2 = g_hash_table_size(n2->children);
}
if (n1->ref != n2->ref ||
n1->deleted_in_tx != n2->deleted_in_tx ||
n1->modified_in_tx != n2->modified_in_tx ||
!compare_perms(n1->perms, n2->perms) ||
!compare_content(n1->content, n2->content) ||
nr_children1 != nr_children2) {
cw->compare_ok = false;
printf("Compare failure on '%s'\n", cw->path);
}
if (nr_children1) {
XsNode *oldparent = cw->parent_2;
cw->parent_2 = n2;
g_hash_table_foreach(n1->children, compare_child, cw);
cw->parent_2 = oldparent;
}
}
static void compare_child(gpointer key, gpointer val, gpointer opaque)
{
struct compare_walk *cw = opaque;
char *childname = key;
XsNode *child1 = val;
XsNode *child2 = g_hash_table_lookup(cw->parent_2->children, childname);
int pathlen = strlen(cw->path);
if (!child2) {
cw->compare_ok = false;
printf("Child '%s' does not exist under '%s'\n", childname, cw->path);
return;
}
strncat(cw->path, "/", sizeof(cw->path) - 1);
strncat(cw->path, childname, sizeof(cw->path) - 1);
compare_nodes(cw, child1, child2);
cw->path[pathlen] = '\0';
}
static bool compare_trees(XsNode *n1, XsNode *n2)
{
struct compare_walk cw;
cw.path[0] = '\0';
cw.parent_2 = n2;
cw.compare_ok = true;
if (!n1 || !n2) {
return false;
}
compare_nodes(&cw, n1, n2);
return cw.compare_ok;
}
static void compare_tx(gpointer key, gpointer val, gpointer opaque)
{
XenstoreImplState *s2 = opaque;
XsTransaction *t1 = val, *t2;
unsigned int tx_id = GPOINTER_TO_INT(key);
t2 = g_hash_table_lookup(s2->transactions, key);
g_assert(t2);
g_assert(t1->tx_id == tx_id);
g_assert(t2->tx_id == tx_id);
g_assert(t1->base_tx == t2->base_tx);
g_assert(t1->dom_id == t2->dom_id);
if (!compare_trees(t1->root, t2->root)) {
printf("Comparison failure in TX %u after serdes:\n", tx_id);
dump_ref("Original", t1->root, 0);
dump_ref("Deserialised", t2->root, 0);
g_assert(0);
}
g_assert(t1->nr_nodes == t2->nr_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 void watch_cb(void *_str, const char *path, const char *token)
{
GString *str = _str;
g_string_append(str, path);
g_string_append(str, token);
}
static void check_serdes(XenstoreImplState *s)
{
XenstoreImplState *s2 = xs_impl_create(DOMID_GUEST);
GByteArray *bytes = xs_impl_serialize(s);
int nr_transactions1, nr_transactions2;
int ret;
ret = xs_impl_deserialize(s2, bytes, DOMID_GUEST, watch_cb, NULL);
g_assert(!ret);
g_byte_array_unref(bytes);
g_assert(s->last_tx == s2->last_tx);
g_assert(s->root_tx == s2->root_tx);
if (!compare_trees(s->root, s2->root)) {
printf("Comparison failure in main tree after serdes:\n");
dump_ref("Original", s->root, 0);
dump_ref("Deserialised", s2->root, 0);
g_assert(0);
}
nr_transactions1 = g_hash_table_size(s->transactions);
nr_transactions2 = g_hash_table_size(s2->transactions);
g_assert(nr_transactions1 == nr_transactions2);
g_hash_table_foreach(s->transactions, compare_tx, s2);
g_assert(s->nr_domu_watches == s2->nr_domu_watches);
g_assert(s->nr_domu_transactions == s2->nr_domu_transactions);
g_assert(s->nr_nodes == s2->nr_nodes);
xs_impl_delete(s2, false);
}
static XenstoreImplState *setup(void)
{
XenstoreImplState *s = xs_impl_create(DOMID_GUEST);
char *abspath;
GList *perms;
int err;
abspath = g_strdup_printf("/local/domain/%u", DOMID_GUEST);
err = write_str(s, DOMID_QEMU, XBT_NULL, abspath, "");
g_assert(!err);
g_assert(s->nr_nodes == 4);
perms = g_list_append(NULL, g_strdup_printf("n%u", DOMID_QEMU));
perms = g_list_append(perms, g_strdup_printf("r%u", DOMID_GUEST));
err = xs_impl_set_perms(s, DOMID_QEMU, XBT_NULL, abspath, perms);
g_assert(!err);
g_list_free_full(perms, g_free);
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);
perms = g_list_append(NULL, g_strdup_printf("n%u", DOMID_GUEST));
err = xs_impl_set_perms(s, DOMID_QEMU, XBT_NULL, abspath, perms);
g_assert(!err);
g_list_free_full(perms, g_free);
g_free(abspath);
return s;
}
static void test_xs_node_simple(void)
{
GByteArray *data = g_byte_array_new();
XenstoreImplState *s = setup();
GString *guest_watches = g_string_new(NULL);
GString *qemu_watches = g_string_new(NULL);
GList *items = NULL;
XsNode *old_root;
uint64_t gencnt;
int err;
g_assert(s);
err = xs_impl_watch(s, DOMID_GUEST, "some", "guestwatch",
watch_cb, guest_watches);
g_assert(!err);
g_assert(guest_watches->len == strlen("someguestwatch"));
g_assert(!strcmp(guest_watches->str, "someguestwatch"));
g_string_truncate(guest_watches, 0);
err = xs_impl_watch(s, 0, "/local/domain/1/some", "qemuwatch",
watch_cb, qemu_watches);
g_assert(!err);
g_assert(qemu_watches->len == strlen("/local/domain/1/someqemuwatch"));
g_assert(!strcmp(qemu_watches->str, "/local/domain/1/someqemuwatch"));
g_string_truncate(qemu_watches, 0);
/* 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);
g_assert(!strcmp(guest_watches->str,
"some/relative/pathguestwatch"));
g_assert(!strcmp(qemu_watches->str,
"/local/domain/1/some/relative/pathqemuwatch"));
g_string_truncate(qemu_watches, 0);
g_string_truncate(guest_watches, 0);
xs_impl_reset_watches(s, 0);
/* 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"));
g_assert(!qemu_watches->len);
g_assert(!guest_watches->len);
/* Keep a copy, to force COW mode */
old_root = xs_node_ref(s->root);
/* Write somewhere we aren't allowed, in COW mode */
err = write_str(s, DOMID_GUEST, XBT_NULL, "/local/domain/badplace",
"moredata");
g_assert(err == EACCES);
g_assert(s->nr_nodes == 7);
/* 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);
g_assert(!qemu_watches->len);
g_assert(!strcmp(guest_watches->str, "some/relative/path2guestwatch"));
g_string_truncate(guest_watches, 0);
/* 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);
g_assert(!qemu_watches->len);
g_assert(!strcmp(guest_watches->str, "some/relative/pathguestwatch"));
g_string_truncate(guest_watches, 0);
/* 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);
err = xs_impl_unwatch(s, DOMID_GUEST, "some", "guestwatch",
watch_cb, guest_watches);
g_assert(!err);
err = xs_impl_unwatch(s, DOMID_GUEST, "some", "guestwatch",
watch_cb, guest_watches);
g_assert(err == ENOENT);
err = xs_impl_watch(s, DOMID_GUEST, "some/relative/path2", "watchp2",
watch_cb, guest_watches);
g_assert(!err);
g_assert(guest_watches->len == strlen("some/relative/path2watchp2"));
g_assert(!strcmp(guest_watches->str, "some/relative/path2watchp2"));
g_string_truncate(guest_watches, 0);
err = xs_impl_watch(s, DOMID_GUEST, "/local/domain/1/some/relative",
"watchrel", watch_cb, guest_watches);
g_assert(!err);
g_assert(guest_watches->len ==
strlen("/local/domain/1/some/relativewatchrel"));
g_assert(!strcmp(guest_watches->str,
"/local/domain/1/some/relativewatchrel"));
g_string_truncate(guest_watches, 0);
/* Write somewhere else which already existed */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/relative", "moredata");
g_assert(!err);
g_assert(s->nr_nodes == 8);
/* Write somewhere we aren't allowed */
err = write_str(s, DOMID_GUEST, XBT_NULL, "/local/domain/badplace",
"moredata");
g_assert(err == EACCES);
g_assert(!strcmp(guest_watches->str,
"/local/domain/1/some/relativewatchrel"));
g_string_truncate(guest_watches, 0);
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_string_truncate(guest_watches, 0);
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);
/* Each watch fires with the least specific relevant path */
g_assert(strstr(guest_watches->str,
"some/relative/path2watchp2"));
g_assert(strstr(guest_watches->str,
"/local/domain/1/some/relativewatchrel"));
g_string_truncate(guest_watches, 0);
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_impl_reset_watches(s, DOMID_GUEST);
g_string_free(qemu_watches, true);
g_string_free(guest_watches, true);
xs_node_unref(old_root);
xs_impl_delete(s, true);
}
static void do_test_xs_node_tx(bool fail, bool commit)
{
XenstoreImplState *s = setup();
GString *watches = g_string_new(NULL);
GByteArray *data = g_byte_array_new();
unsigned int tx_id = XBT_NULL;
int err;
g_assert(s);
/* Set a watch */
err = xs_impl_watch(s, DOMID_GUEST, "some", "watch",
watch_cb, watches);
g_assert(!err);
g_assert(watches->len == strlen("somewatch"));
g_assert(!strcmp(watches->str, "somewatch"));
g_string_truncate(watches, 0);
/* Write something */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/relative/path",
"something");
g_assert(s->nr_nodes == 7);
g_assert(!err);
g_assert(!strcmp(watches->str,
"some/relative/pathwatch"));
g_string_truncate(watches, 0);
/* Create a transaction */
err = xs_impl_transaction_start(s, DOMID_GUEST, &tx_id);
g_assert(!err);
if (fail) {
/* Write something else in the root */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/relative/path",
"another thing");
g_assert(!err);
g_assert(s->nr_nodes == 7);
g_assert(!strcmp(watches->str,
"some/relative/pathwatch"));
g_string_truncate(watches, 0);
}
g_assert(!watches->len);
/* Perform a write in the transaction */
err = write_str(s, DOMID_GUEST, tx_id, "some/relative/path",
"something else");
g_assert(!err);
g_assert(s->nr_nodes == 7);
g_assert(!watches->len);
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "some/relative/path", data);
g_assert(!err);
if (fail) {
g_assert(data->len == strlen("another thing"));
g_assert(!memcmp(data->data, "another thing", data->len));
} else {
g_assert(data->len == strlen("something"));
g_assert(!memcmp(data->data, "something", data->len));
}
g_byte_array_set_size(data, 0);
err = xs_impl_read(s, DOMID_GUEST, tx_id, "some/relative/path", data);
g_assert(!err);
g_assert(data->len == strlen("something else"));
g_assert(!memcmp(data->data, "something else", data->len));
g_byte_array_set_size(data, 0);
check_serdes(s);
/* Attempt to commit the transaction */
err = xs_impl_transaction_end(s, DOMID_GUEST, tx_id, commit);
if (commit && fail) {
g_assert(err == EAGAIN);
} else {
g_assert(!err);
}
if (commit && !fail) {
g_assert(!strcmp(watches->str,
"some/relative/pathwatch"));
g_string_truncate(watches, 0);
} else {
g_assert(!watches->len);
}
g_assert(s->nr_nodes == 7);
check_serdes(s);
err = xs_impl_unwatch(s, DOMID_GUEST, "some", "watch",
watch_cb, watches);
g_assert(!err);
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "some/relative/path", data);
g_assert(!err);
if (fail) {
g_assert(data->len == strlen("another thing"));
g_assert(!memcmp(data->data, "another thing", data->len));
} else if (commit) {
g_assert(data->len == strlen("something else"));
g_assert(!memcmp(data->data, "something else", data->len));
} else {
g_assert(data->len == strlen("something"));
g_assert(!memcmp(data->data, "something", data->len));
}
g_byte_array_unref(data);
g_string_free(watches, true);
xs_impl_delete(s, true);
}
static void test_xs_node_tx_fail(void)
{
do_test_xs_node_tx(true, true);
}
static void test_xs_node_tx_abort(void)
{
do_test_xs_node_tx(false, false);
do_test_xs_node_tx(true, false);
}
static void test_xs_node_tx_succeed(void)
{
do_test_xs_node_tx(false, true);
}
static void test_xs_node_tx_rm(void)
{
XenstoreImplState *s = setup();
GString *watches = g_string_new(NULL);
GByteArray *data = g_byte_array_new();
unsigned int tx_id = XBT_NULL;
int err;
g_assert(s);
/* Set a watch */
err = xs_impl_watch(s, DOMID_GUEST, "some", "watch",
watch_cb, watches);
g_assert(!err);
g_assert(watches->len == strlen("somewatch"));
g_assert(!strcmp(watches->str, "somewatch"));
g_string_truncate(watches, 0);
/* Write something */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/deep/dark/relative/path",
"something");
g_assert(!err);
g_assert(s->nr_nodes == 9);
g_assert(!strcmp(watches->str,
"some/deep/dark/relative/pathwatch"));
g_string_truncate(watches, 0);
/* Create a transaction */
err = xs_impl_transaction_start(s, DOMID_GUEST, &tx_id);
g_assert(!err);
/* Delete the tree in the transaction */
err = xs_impl_rm(s, DOMID_GUEST, tx_id, "some/deep/dark");
g_assert(!err);
g_assert(s->nr_nodes == 9);
g_assert(!watches->len);
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "some/deep/dark/relative/path",
data);
g_assert(!err);
g_assert(data->len == strlen("something"));
g_assert(!memcmp(data->data, "something", data->len));
g_byte_array_set_size(data, 0);
check_serdes(s);
/* Commit the transaction */
err = xs_impl_transaction_end(s, DOMID_GUEST, tx_id, true);
g_assert(!err);
g_assert(s->nr_nodes == 6);
g_assert(!strcmp(watches->str, "some/deep/darkwatch"));
g_string_truncate(watches, 0);
/* Now the node is gone */
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "some/deep/dark/relative/path",
data);
g_assert(err == ENOENT);
g_byte_array_unref(data);
err = xs_impl_unwatch(s, DOMID_GUEST, "some", "watch",
watch_cb, watches);
g_assert(!err);
g_string_free(watches, true);
xs_impl_delete(s, true);
}
static void test_xs_node_tx_resurrect(void)
{
XenstoreImplState *s = setup();
GString *watches = g_string_new(NULL);
GByteArray *data = g_byte_array_new();
unsigned int tx_id = XBT_NULL;
int err;
g_assert(s);
/* Write something */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/deep/dark/relative/path",
"something");
g_assert(!err);
g_assert(s->nr_nodes == 9);
/* Another node to remain shared */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/place/safe", "keepme");
g_assert(!err);
g_assert(s->nr_nodes == 11);
/* This node will be wiped and resurrected */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/deep/dark",
"foo");
g_assert(!err);
g_assert(s->nr_nodes == 11);
/* Set a watch */
err = xs_impl_watch(s, DOMID_GUEST, "some", "watch",
watch_cb, watches);
g_assert(!err);
g_assert(watches->len == strlen("somewatch"));
g_assert(!strcmp(watches->str, "somewatch"));
g_string_truncate(watches, 0);
/* Create a transaction */
err = xs_impl_transaction_start(s, DOMID_GUEST, &tx_id);
g_assert(!err);
/* Delete the tree in the transaction */
err = xs_impl_rm(s, DOMID_GUEST, tx_id, "some/deep");
g_assert(!err);
g_assert(s->nr_nodes == 11);
g_assert(!watches->len);
/* Resurrect part of it */
err = write_str(s, DOMID_GUEST, tx_id, "some/deep/dark/different/path",
"something");
g_assert(!err);
g_assert(s->nr_nodes == 11);
check_serdes(s);
/* Commit the transaction */
err = xs_impl_transaction_end(s, DOMID_GUEST, tx_id, true);
g_assert(!err);
g_assert(s->nr_nodes == 11);
check_serdes(s);
/* lost data */
g_assert(strstr(watches->str, "some/deep/dark/different/pathwatch"));
/* topmost deleted */
g_assert(strstr(watches->str, "some/deep/dark/relativewatch"));
/* lost data */
g_assert(strstr(watches->str, "some/deep/darkwatch"));
g_string_truncate(watches, 0);
/* Now the node is gone */
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "some/deep/dark/relative/path",
data);
g_assert(err == ENOENT);
g_byte_array_unref(data);
check_serdes(s);
err = xs_impl_unwatch(s, DOMID_GUEST, "some", "watch",
watch_cb, watches);
g_assert(!err);
g_string_free(watches, true);
xs_impl_delete(s, true);
}
static void test_xs_node_tx_resurrect2(void)
{
XenstoreImplState *s = setup();
GString *watches = g_string_new(NULL);
GByteArray *data = g_byte_array_new();
unsigned int tx_id = XBT_NULL;
int err;
g_assert(s);
/* Write something */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/deep/dark/relative/path",
"something");
g_assert(!err);
g_assert(s->nr_nodes == 9);
/* Another node to remain shared */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/place/safe", "keepme");
g_assert(!err);
g_assert(s->nr_nodes == 11);
/* This node will be wiped and resurrected */
err = write_str(s, DOMID_GUEST, XBT_NULL, "some/deep/dark",
"foo");
g_assert(!err);
g_assert(s->nr_nodes == 11);
/* Set a watch */
err = xs_impl_watch(s, DOMID_GUEST, "some", "watch",
watch_cb, watches);
g_assert(!err);
g_assert(watches->len == strlen("somewatch"));
g_assert(!strcmp(watches->str, "somewatch"));
g_string_truncate(watches, 0);
/* Create a transaction */
err = xs_impl_transaction_start(s, DOMID_GUEST, &tx_id);
g_assert(!err);
/* Delete the tree in the transaction */
err = xs_impl_rm(s, DOMID_GUEST, tx_id, "some/deep");
g_assert(!err);
g_assert(s->nr_nodes == 11);
g_assert(!watches->len);
/* Resurrect part of it */
err = write_str(s, DOMID_GUEST, tx_id, "some/deep/dark/relative/path",
"something");
g_assert(!err);
g_assert(s->nr_nodes == 11);
check_serdes(s);
/* Commit the transaction */
err = xs_impl_transaction_end(s, DOMID_GUEST, tx_id, true);
g_assert(!err);
g_assert(s->nr_nodes == 11);
check_serdes(s);
/* lost data */
g_assert(strstr(watches->str, "some/deep/dark/relative/pathwatch"));
/* lost data */
g_assert(strstr(watches->str, "some/deep/darkwatch"));
g_string_truncate(watches, 0);
/* Now the node is gone */
err = xs_impl_read(s, DOMID_GUEST, XBT_NULL, "some/deep/dark/relative/path",
data);
g_assert(!err);
g_assert(data->len == strlen("something"));
g_assert(!memcmp(data->data, "something", data->len));
g_byte_array_unref(data);
check_serdes(s);
err = xs_impl_unwatch(s, DOMID_GUEST, "some", "watch",
watch_cb, watches);
g_assert(!err);
g_string_free(watches, true);
xs_impl_delete(s, true);
}
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);
g_test_add_func("/xs_node/tx_abort", test_xs_node_tx_abort);
g_test_add_func("/xs_node/tx_fail", test_xs_node_tx_fail);
g_test_add_func("/xs_node/tx_succeed", test_xs_node_tx_succeed);
g_test_add_func("/xs_node/tx_rm", test_xs_node_tx_rm);
g_test_add_func("/xs_node/tx_resurrect", test_xs_node_tx_resurrect);
g_test_add_func("/xs_node/tx_resurrect2", test_xs_node_tx_resurrect2);
return g_test_run();
}
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