The boot block used in the migration test is currently only
shipped as a hex (with the source in the git commit message of ea0c6d62
),
change this to actually include the source.
A script is added to rebuild the header but the expectation is that
the generated hex is shipped as well as the .s, so that
there's no requirement to have just the right assembler etc.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20180213100606.5379-1-dgilbert@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Removed blank line at end of script
587 lines
16 KiB
C
587 lines
16 KiB
C
/*
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* QTest testcase for migration
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*
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* Copyright (c) 2016-2018 Red Hat, Inc. and/or its affiliates
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* based on the vhost-user-test.c that is:
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* Copyright (c) 2014 Virtual Open Systems Sarl.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "libqtest.h"
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#include "qapi/qmp/qdict.h"
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#include "qemu/option.h"
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#include "qemu/range.h"
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#include "qemu/sockets.h"
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#include "chardev/char.h"
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#include "sysemu/sysemu.h"
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#include "hw/nvram/chrp_nvram.h"
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#define MIN_NVRAM_SIZE 8192 /* from spapr_nvram.c */
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const unsigned start_address = 1024 * 1024;
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const unsigned end_address = 100 * 1024 * 1024;
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bool got_stop;
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#if defined(__linux__)
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#include <sys/syscall.h>
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#include <sys/vfs.h>
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#endif
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#if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
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#include <sys/eventfd.h>
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#include <sys/ioctl.h>
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#include <linux/userfaultfd.h>
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static bool ufd_version_check(void)
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{
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struct uffdio_api api_struct;
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uint64_t ioctl_mask;
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int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
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if (ufd == -1) {
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g_test_message("Skipping test: userfaultfd not available");
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return false;
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}
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api_struct.api = UFFD_API;
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api_struct.features = 0;
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if (ioctl(ufd, UFFDIO_API, &api_struct)) {
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g_test_message("Skipping test: UFFDIO_API failed");
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return false;
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}
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ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
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(__u64)1 << _UFFDIO_UNREGISTER;
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if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
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g_test_message("Skipping test: Missing userfault feature");
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return false;
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}
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return true;
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}
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#else
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static bool ufd_version_check(void)
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{
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g_test_message("Skipping test: Userfault not available (builtdtime)");
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return false;
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}
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#endif
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static const char *tmpfs;
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/* A simple PC boot sector that modifies memory (1-100MB) quickly
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* outputting a 'B' every so often if it's still running.
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*/
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#include "tests/migration/x86-a-b-bootblock.h"
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static void init_bootfile_x86(const char *bootpath)
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{
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FILE *bootfile = fopen(bootpath, "wb");
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g_assert_cmpint(fwrite(x86_bootsect, 512, 1, bootfile), ==, 1);
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fclose(bootfile);
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}
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static void init_bootfile_ppc(const char *bootpath)
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{
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FILE *bootfile;
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char buf[MIN_NVRAM_SIZE];
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ChrpNvramPartHdr *header = (ChrpNvramPartHdr *)buf;
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memset(buf, 0, MIN_NVRAM_SIZE);
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/* Create a "common" partition in nvram to store boot-command property */
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header->signature = CHRP_NVPART_SYSTEM;
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memcpy(header->name, "common", 6);
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chrp_nvram_finish_partition(header, MIN_NVRAM_SIZE);
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/* FW_MAX_SIZE is 4MB, but slof.bin is only 900KB,
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* so let's modify memory between 1MB and 100MB
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* to do like PC bootsector
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*/
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sprintf(buf + 16,
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"boot-command=hex .\" _\" begin %x %x do i c@ 1 + i c! 1000 +loop "
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".\" B\" 0 until", end_address, start_address);
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/* Write partition to the NVRAM file */
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bootfile = fopen(bootpath, "wb");
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g_assert_cmpint(fwrite(buf, MIN_NVRAM_SIZE, 1, bootfile), ==, 1);
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fclose(bootfile);
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}
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/*
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* Wait for some output in the serial output file,
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* we get an 'A' followed by an endless string of 'B's
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* but on the destination we won't have the A.
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*/
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static void wait_for_serial(const char *side)
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{
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char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
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FILE *serialfile = fopen(serialpath, "r");
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const char *arch = qtest_get_arch();
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int started = (strcmp(side, "src_serial") == 0 &&
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strcmp(arch, "ppc64") == 0) ? 0 : 1;
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g_free(serialpath);
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do {
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int readvalue = fgetc(serialfile);
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if (!started) {
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/* SLOF prints its banner before starting test,
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* to ignore it, mark the start of the test with '_',
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* ignore all characters until this marker
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*/
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switch (readvalue) {
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case '_':
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started = 1;
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break;
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case EOF:
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fseek(serialfile, 0, SEEK_SET);
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usleep(1000);
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break;
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}
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continue;
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}
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switch (readvalue) {
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case 'A':
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/* Fine */
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break;
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case 'B':
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/* It's alive! */
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fclose(serialfile);
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return;
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case EOF:
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started = (strcmp(side, "src_serial") == 0 &&
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strcmp(arch, "ppc64") == 0) ? 0 : 1;
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fseek(serialfile, 0, SEEK_SET);
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usleep(1000);
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break;
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default:
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fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
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g_assert_not_reached();
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}
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} while (true);
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}
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/*
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* Events can get in the way of responses we are actually waiting for.
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*/
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static QDict *wait_command(QTestState *who, const char *command)
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{
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const char *event_string;
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QDict *response;
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response = qtest_qmp(who, command);
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while (qdict_haskey(response, "event")) {
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/* OK, it was an event */
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event_string = qdict_get_str(response, "event");
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if (!strcmp(event_string, "STOP")) {
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got_stop = true;
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}
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QDECREF(response);
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response = qtest_qmp_receive(who);
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}
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return response;
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}
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/*
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* It's tricky to use qemu's migration event capability with qtest,
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* events suddenly appearing confuse the qmp()/hmp() responses.
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*/
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static uint64_t get_migration_pass(QTestState *who)
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{
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QDict *rsp, *rsp_return, *rsp_ram;
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uint64_t result;
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rsp = wait_command(who, "{ 'execute': 'query-migrate' }");
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rsp_return = qdict_get_qdict(rsp, "return");
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if (!qdict_haskey(rsp_return, "ram")) {
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/* Still in setup */
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result = 0;
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} else {
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rsp_ram = qdict_get_qdict(rsp_return, "ram");
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result = qdict_get_try_int(rsp_ram, "dirty-sync-count", 0);
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}
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QDECREF(rsp);
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return result;
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}
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static void wait_for_migration_complete(QTestState *who)
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{
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while (true) {
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QDict *rsp, *rsp_return;
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bool completed;
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const char *status;
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rsp = wait_command(who, "{ 'execute': 'query-migrate' }");
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rsp_return = qdict_get_qdict(rsp, "return");
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status = qdict_get_str(rsp_return, "status");
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completed = strcmp(status, "completed") == 0;
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g_assert_cmpstr(status, !=, "failed");
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QDECREF(rsp);
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if (completed) {
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return;
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}
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usleep(1000);
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}
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}
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static void wait_for_migration_pass(QTestState *who)
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{
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uint64_t initial_pass = get_migration_pass(who);
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uint64_t pass;
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/* Wait for the 1st sync */
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while (!got_stop && !initial_pass) {
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usleep(1000);
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initial_pass = get_migration_pass(who);
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}
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do {
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usleep(1000);
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pass = get_migration_pass(who);
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} while (pass == initial_pass && !got_stop);
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}
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static void check_guests_ram(QTestState *who)
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{
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/* Our ASM test will have been incrementing one byte from each page from
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* 1MB to <100MB in order.
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* This gives us a constraint that any page's byte should be equal or less
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* than the previous pages byte (mod 256); and they should all be equal
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* except for one transition at the point where we meet the incrementer.
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* (We're running this with the guest stopped).
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*/
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unsigned address;
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uint8_t first_byte;
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uint8_t last_byte;
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bool hit_edge = false;
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bool bad = false;
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qtest_memread(who, start_address, &first_byte, 1);
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last_byte = first_byte;
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for (address = start_address + 4096; address < end_address; address += 4096)
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{
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uint8_t b;
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qtest_memread(who, address, &b, 1);
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if (b != last_byte) {
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if (((b + 1) % 256) == last_byte && !hit_edge) {
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/* This is OK, the guest stopped at the point of
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* incrementing the previous page but didn't get
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* to us yet.
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*/
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hit_edge = true;
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} else {
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fprintf(stderr, "Memory content inconsistency at %x"
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" first_byte = %x last_byte = %x current = %x"
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" hit_edge = %x\n",
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address, first_byte, last_byte, b, hit_edge);
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bad = true;
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}
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}
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last_byte = b;
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}
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g_assert_false(bad);
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}
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static void cleanup(const char *filename)
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{
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char *path = g_strdup_printf("%s/%s", tmpfs, filename);
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unlink(path);
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g_free(path);
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}
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static void migrate_check_parameter(QTestState *who, const char *parameter,
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const char *value)
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{
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QDict *rsp, *rsp_return;
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char *result;
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rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
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rsp_return = qdict_get_qdict(rsp, "return");
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result = g_strdup_printf("%" PRId64,
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qdict_get_try_int(rsp_return, parameter, -1));
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g_assert_cmpstr(result, ==, value);
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g_free(result);
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QDECREF(rsp);
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}
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static void migrate_set_parameter(QTestState *who, const char *parameter,
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const char *value)
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{
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QDict *rsp;
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gchar *cmd;
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cmd = g_strdup_printf("{ 'execute': 'migrate-set-parameters',"
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"'arguments': { '%s': %s } }",
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parameter, value);
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rsp = qtest_qmp(who, cmd);
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g_free(cmd);
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g_assert(qdict_haskey(rsp, "return"));
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QDECREF(rsp);
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migrate_check_parameter(who, parameter, value);
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}
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static void migrate_set_capability(QTestState *who, const char *capability,
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const char *value)
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{
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QDict *rsp;
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gchar *cmd;
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cmd = g_strdup_printf("{ 'execute': 'migrate-set-capabilities',"
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"'arguments': { "
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"'capabilities': [ { "
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"'capability': '%s', 'state': %s } ] } }",
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capability, value);
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rsp = qtest_qmp(who, cmd);
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g_free(cmd);
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g_assert(qdict_haskey(rsp, "return"));
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QDECREF(rsp);
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}
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static void migrate(QTestState *who, const char *uri)
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{
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QDict *rsp;
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gchar *cmd;
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cmd = g_strdup_printf("{ 'execute': 'migrate',"
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"'arguments': { 'uri': '%s' } }",
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uri);
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rsp = qtest_qmp(who, cmd);
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g_free(cmd);
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g_assert(qdict_haskey(rsp, "return"));
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QDECREF(rsp);
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}
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static void migrate_start_postcopy(QTestState *who)
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{
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QDict *rsp;
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rsp = wait_command(who, "{ 'execute': 'migrate-start-postcopy' }");
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g_assert(qdict_haskey(rsp, "return"));
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QDECREF(rsp);
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}
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static void test_migrate_start(QTestState **from, QTestState **to,
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const char *uri)
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{
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gchar *cmd_src, *cmd_dst;
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char *bootpath = g_strdup_printf("%s/bootsect", tmpfs);
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const char *arch = qtest_get_arch();
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const char *accel = "kvm:tcg";
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got_stop = false;
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if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
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init_bootfile_x86(bootpath);
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cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
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" -name source,debug-threads=on"
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" -serial file:%s/src_serial"
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" -drive file=%s,format=raw",
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accel, tmpfs, bootpath);
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cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
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" -name target,debug-threads=on"
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" -serial file:%s/dest_serial"
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" -drive file=%s,format=raw"
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" -incoming %s",
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accel, tmpfs, bootpath, uri);
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} else if (strcmp(arch, "ppc64") == 0) {
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/* On ppc64, the test only works with kvm-hv, but not with kvm-pr */
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if (access("/sys/module/kvm_hv", F_OK)) {
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accel = "tcg";
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}
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init_bootfile_ppc(bootpath);
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cmd_src = g_strdup_printf("-machine accel=%s -m 256M"
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" -name source,debug-threads=on"
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" -serial file:%s/src_serial"
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" -drive file=%s,if=pflash,format=raw",
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accel, tmpfs, bootpath);
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cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
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" -name target,debug-threads=on"
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" -serial file:%s/dest_serial"
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" -incoming %s",
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accel, tmpfs, uri);
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} else {
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g_assert_not_reached();
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}
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g_free(bootpath);
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*from = qtest_start(cmd_src);
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g_free(cmd_src);
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*to = qtest_init(cmd_dst);
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g_free(cmd_dst);
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}
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static void test_migrate_end(QTestState *from, QTestState *to)
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{
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unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
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qtest_quit(from);
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qtest_memread(to, start_address, &dest_byte_a, 1);
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/* Destination still running, wait for a byte to change */
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do {
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qtest_memread(to, start_address, &dest_byte_b, 1);
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usleep(1000 * 10);
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} while (dest_byte_a == dest_byte_b);
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qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
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/* With it stopped, check nothing changes */
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qtest_memread(to, start_address, &dest_byte_c, 1);
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usleep(1000 * 200);
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qtest_memread(to, start_address, &dest_byte_d, 1);
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g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
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check_guests_ram(to);
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qtest_quit(to);
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cleanup("bootsect");
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cleanup("migsocket");
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cleanup("src_serial");
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cleanup("dest_serial");
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}
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static void deprecated_set_downtime(QTestState *who, const double value)
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{
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QDict *rsp;
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gchar *cmd;
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char *expected;
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int64_t result_int;
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cmd = g_strdup_printf("{ 'execute': 'migrate_set_downtime',"
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"'arguments': { 'value': %g } }", value);
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rsp = qtest_qmp(who, cmd);
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g_free(cmd);
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g_assert(qdict_haskey(rsp, "return"));
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QDECREF(rsp);
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result_int = value * 1000L;
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expected = g_strdup_printf("%" PRId64, result_int);
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migrate_check_parameter(who, "downtime-limit", expected);
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g_free(expected);
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}
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static void deprecated_set_speed(QTestState *who, const char *value)
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{
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QDict *rsp;
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gchar *cmd;
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cmd = g_strdup_printf("{ 'execute': 'migrate_set_speed',"
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"'arguments': { 'value': %s } }", value);
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rsp = qtest_qmp(who, cmd);
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g_free(cmd);
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g_assert(qdict_haskey(rsp, "return"));
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QDECREF(rsp);
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migrate_check_parameter(who, "max-bandwidth", value);
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}
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static void test_deprecated(void)
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{
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QTestState *from;
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|
|
from = qtest_start("");
|
|
|
|
deprecated_set_downtime(from, 0.12345);
|
|
deprecated_set_speed(from, "12345");
|
|
|
|
qtest_quit(from);
|
|
}
|
|
|
|
static void test_migrate(void)
|
|
{
|
|
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
|
|
QTestState *from, *to;
|
|
|
|
test_migrate_start(&from, &to, uri);
|
|
|
|
migrate_set_capability(from, "postcopy-ram", "true");
|
|
migrate_set_capability(to, "postcopy-ram", "true");
|
|
|
|
/* We want to pick a speed slow enough that the test completes
|
|
* quickly, but that it doesn't complete precopy even on a slow
|
|
* machine, so also set the downtime.
|
|
*/
|
|
migrate_set_parameter(from, "max-bandwidth", "100000000");
|
|
migrate_set_parameter(from, "downtime-limit", "1");
|
|
|
|
/* Wait for the first serial output from the source */
|
|
wait_for_serial("src_serial");
|
|
|
|
migrate(from, uri);
|
|
|
|
wait_for_migration_pass(from);
|
|
|
|
migrate_start_postcopy(from);
|
|
|
|
if (!got_stop) {
|
|
qtest_qmp_eventwait(from, "STOP");
|
|
}
|
|
|
|
qtest_qmp_eventwait(to, "RESUME");
|
|
|
|
wait_for_serial("dest_serial");
|
|
wait_for_migration_complete(from);
|
|
|
|
g_free(uri);
|
|
|
|
test_migrate_end(from, to);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
char template[] = "/tmp/migration-test-XXXXXX";
|
|
int ret;
|
|
|
|
g_test_init(&argc, &argv, NULL);
|
|
|
|
if (!ufd_version_check()) {
|
|
return 0;
|
|
}
|
|
|
|
tmpfs = mkdtemp(template);
|
|
if (!tmpfs) {
|
|
g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
|
|
}
|
|
g_assert(tmpfs);
|
|
|
|
module_call_init(MODULE_INIT_QOM);
|
|
|
|
qtest_add_func("/migration/postcopy/unix", test_migrate);
|
|
qtest_add_func("/migration/deprecated", test_deprecated);
|
|
|
|
ret = g_test_run();
|
|
|
|
g_assert_cmpint(ret, ==, 0);
|
|
|
|
ret = rmdir(tmpfs);
|
|
if (ret != 0) {
|
|
g_test_message("unable to rmdir: path (%s): %s\n",
|
|
tmpfs, strerror(errno));
|
|
}
|
|
|
|
return ret;
|
|
}
|