diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/Makefile.include | 2 | ||||
| -rw-r--r-- | tests/postcopy-test.c | 455 |
2 files changed, 457 insertions, 0 deletions
diff --git a/tests/Makefile.include b/tests/Makefile.include index 7d63d16c3f..6135875c37 100644 --- a/tests/Makefile.include +++ b/tests/Makefile.include @@ -234,6 +234,7 @@ endif check-qtest-i386-y += tests/test-netfilter$(EXESUF) check-qtest-i386-y += tests/test-filter-mirror$(EXESUF) check-qtest-i386-y += tests/test-filter-redirector$(EXESUF) +check-qtest-i386-y += tests/postcopy-test$(EXESUF) check-qtest-x86_64-y = $(check-qtest-i386-y) gcov-files-i386-y += i386-softmmu/hw/timer/mc146818rtc.c gcov-files-x86_64-y = $(subst i386-softmmu/,x86_64-softmmu/,$(gcov-files-i386-y)) @@ -599,6 +600,7 @@ tests/usb-hcd-uhci-test$(EXESUF): tests/usb-hcd-uhci-test.o $(libqos-usb-obj-y) tests/usb-hcd-ehci-test$(EXESUF): tests/usb-hcd-ehci-test.o $(libqos-usb-obj-y) tests/usb-hcd-xhci-test$(EXESUF): tests/usb-hcd-xhci-test.o $(libqos-usb-obj-y) tests/pc-cpu-test$(EXESUF): tests/pc-cpu-test.o +tests/postcopy-test$(EXESUF): tests/postcopy-test.o tests/vhost-user-test$(EXESUF): tests/vhost-user-test.o qemu-char.o qemu-timer.o $(qtest-obj-y) $(test-io-obj-y) tests/qemu-iotests/socket_scm_helper$(EXESUF): tests/qemu-iotests/socket_scm_helper.o tests/test-qemu-opts$(EXESUF): tests/test-qemu-opts.o $(test-util-obj-y) diff --git a/tests/postcopy-test.c b/tests/postcopy-test.c new file mode 100644 index 0000000000..9ff88eea0f --- /dev/null +++ b/tests/postcopy-test.c @@ -0,0 +1,455 @@ +/* + * QTest testcase for postcopy + * + * Copyright (c) 2016 Red Hat, Inc. and/or its affiliates + * based on the vhost-user-test.c that is: + * Copyright (c) 2014 Virtual Open Systems Sarl. + * + * 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 <glib.h> + +#include "libqtest.h" +#include "qemu/option.h" +#include "qemu/range.h" +#include "sysemu/char.h" +#include "sysemu/sysemu.h" + +#include <qemu/sockets.h> + +const unsigned start_address = 1024 * 1024; +const unsigned end_address = 100 * 1024 * 1024; +bool got_stop; + +#if defined(__linux__) +#include <sys/mman.h> +#include <sys/syscall.h> +#include <sys/vfs.h> +#endif + +#if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD) +#include <sys/eventfd.h> +#include <sys/ioctl.h> +#include <linux/userfaultfd.h> + +static bool ufd_version_check(void) +{ + struct uffdio_api api_struct; + uint64_t ioctl_mask; + + int ufd = ufd = syscall(__NR_userfaultfd, O_CLOEXEC); + + if (ufd == -1) { + g_test_message("Skipping test: userfaultfd not available"); + return false; + } + + api_struct.api = UFFD_API; + api_struct.features = 0; + if (ioctl(ufd, UFFDIO_API, &api_struct)) { + g_test_message("Skipping test: UFFDIO_API failed"); + return false; + } + + ioctl_mask = (__u64)1 << _UFFDIO_REGISTER | + (__u64)1 << _UFFDIO_UNREGISTER; + if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) { + g_test_message("Skipping test: Missing userfault feature"); + return false; + } + + return true; +} + +#else +static bool ufd_version_check(void) +{ + g_test_message("Skipping test: Userfault not available (builtdtime)"); + return false; +} + +#endif + +static const char *tmpfs; + +/* A simple PC boot sector that modifies memory (1-100MB) quickly + * outputing a 'B' every so often if it's still running. + */ +unsigned char bootsect[] = { + 0xfa, 0x0f, 0x01, 0x16, 0x74, 0x7c, 0x66, 0xb8, 0x01, 0x00, 0x00, 0x00, + 0x0f, 0x22, 0xc0, 0x66, 0xea, 0x20, 0x7c, 0x00, 0x00, 0x08, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe4, 0x92, 0x0c, 0x02, + 0xe6, 0x92, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x8e, 0xd8, 0x66, 0xb8, 0x41, + 0x00, 0x66, 0xba, 0xf8, 0x03, 0xee, 0xb3, 0x00, 0xb8, 0x00, 0x00, 0x10, + 0x00, 0xfe, 0x00, 0x05, 0x00, 0x10, 0x00, 0x00, 0x3d, 0x00, 0x00, 0x40, + 0x06, 0x7c, 0xf2, 0xfe, 0xc3, 0x75, 0xe9, 0x66, 0xb8, 0x42, 0x00, 0x66, + 0xba, 0xf8, 0x03, 0xee, 0xeb, 0xde, 0x66, 0x90, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x9a, 0xcf, 0x00, + 0xff, 0xff, 0x00, 0x00, 0x00, 0x92, 0xcf, 0x00, 0x27, 0x00, 0x5c, 0x7c, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa +}; + +/* + * Wait for some output in the serial output file, + * we get an 'A' followed by an endless string of 'B's + * but on the destination we won't have the A. + */ +static void wait_for_serial(const char *side) +{ + char *serialpath = g_strdup_printf("%s/%s", tmpfs, side); + FILE *serialfile = fopen(serialpath, "r"); + + do { + int readvalue = fgetc(serialfile); + + switch (readvalue) { + case 'A': + /* Fine */ + break; + + case 'B': + /* It's alive! */ + fclose(serialfile); + g_free(serialpath); + return; + + case EOF: + fseek(serialfile, 0, SEEK_SET); + usleep(1000); + break; + + default: + fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side); + g_assert_not_reached(); + } + } while (true); +} + +/* + * Events can get in the way of responses we are actually waiting for. + */ +static QDict *return_or_event(QDict *response) +{ + const char *event_string; + if (!qdict_haskey(response, "event")) { + return response; + } + + /* OK, it was an event */ + event_string = qdict_get_str(response, "event"); + if (!strcmp(event_string, "STOP")) { + got_stop = true; + } + QDECREF(response); + return return_or_event(qtest_qmp_receive(global_qtest)); +} + + +/* + * It's tricky to use qemu's migration event capability with qtest, + * events suddenly appearing confuse the qmp()/hmp() responses. + * so wait for a couple of passes to have happened before + * going postcopy. + */ + +static uint64_t get_migration_pass(void) +{ + QDict *rsp, *rsp_return, *rsp_ram; + uint64_t result; + + rsp = return_or_event(qmp("{ 'execute': 'query-migrate' }")); + rsp_return = qdict_get_qdict(rsp, "return"); + if (!qdict_haskey(rsp_return, "ram")) { + /* Still in setup */ + result = 0; + } else { + rsp_ram = qdict_get_qdict(rsp_return, "ram"); + result = qdict_get_try_int(rsp_ram, "dirty-sync-count", 0); + QDECREF(rsp); + } + return result; +} + +static void wait_for_migration_complete(void) +{ + QDict *rsp, *rsp_return; + bool completed; + + do { + const char *status; + + rsp = return_or_event(qmp("{ 'execute': 'query-migrate' }")); + rsp_return = qdict_get_qdict(rsp, "return"); + status = qdict_get_str(rsp_return, "status"); + completed = strcmp(status, "completed") == 0; + g_assert_cmpstr(status, !=, "failed"); + QDECREF(rsp); + usleep(1000 * 100); + } while (!completed); +} + +static void wait_for_migration_pass(void) +{ + uint64_t initial_pass = get_migration_pass(); + uint64_t pass; + + /* Wait for the 1st sync */ + do { + initial_pass = get_migration_pass(); + if (got_stop || initial_pass) { + break; + } + usleep(1000 * 100); + } while (true); + + do { + usleep(1000 * 100); + pass = get_migration_pass(); + } while (pass == initial_pass && !got_stop); +} + +static void check_guests_ram(void) +{ + /* Our ASM test will have been incrementing one byte from each page from + * 1MB to <100MB in order. + * This gives us a constraint that any page's byte should be equal or less + * than the previous pages byte (mod 256); and they should all be equal + * except for one transition at the point where we meet the incrementer. + * (We're running this with the guest stopped). + */ + unsigned address; + uint8_t first_byte; + uint8_t last_byte; + bool hit_edge = false; + bool bad = false; + + qtest_memread(global_qtest, start_address, &first_byte, 1); + last_byte = first_byte; + + for (address = start_address + 4096; address < end_address; address += 4096) + { + uint8_t b; + qtest_memread(global_qtest, address, &b, 1); + if (b != last_byte) { + if (((b + 1) % 256) == last_byte && !hit_edge) { + /* This is OK, the guest stopped at the point of + * incrementing the previous page but didn't get + * to us yet. + */ + hit_edge = true; + } else { + fprintf(stderr, "Memory content inconsistency at %x" + " first_byte = %x last_byte = %x current = %x" + " hit_edge = %x\n", + address, first_byte, last_byte, b, hit_edge); + bad = true; + } + } + last_byte = b; + } + g_assert_false(bad); +} + +static void cleanup(const char *filename) +{ + char *path = g_strdup_printf("%s/%s", tmpfs, filename); + + unlink(path); +} + +static void test_migrate(void) +{ + char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs); + QTestState *global = global_qtest, *from, *to; + unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d; + gchar *cmd; + QDict *rsp; + + char *bootpath = g_strdup_printf("%s/bootsect", tmpfs); + FILE *bootfile = fopen(bootpath, "wb"); + + got_stop = false; + g_assert_cmpint(fwrite(bootsect, 512, 1, bootfile), ==, 1); + fclose(bootfile); + + cmd = g_strdup_printf("-machine accel=kvm:tcg -m 150M" + " -name pcsource,debug-threads=on" + " -serial file:%s/src_serial" + " -drive file=%s,format=raw", + tmpfs, bootpath); + from = qtest_start(cmd); + g_free(cmd); + + cmd = g_strdup_printf("-machine accel=kvm:tcg -m 150M" + " -name pcdest,debug-threads=on" + " -serial file:%s/dest_serial" + " -drive file=%s,format=raw" + " -incoming %s", + tmpfs, bootpath, uri); + to = qtest_init(cmd); + g_free(cmd); + + global_qtest = from; + rsp = qmp("{ 'execute': 'migrate-set-capabilities'," + "'arguments': { " + "'capabilities': [ {" + "'capability': 'postcopy-ram'," + "'state': true } ] } }"); + g_assert(qdict_haskey(rsp, "return")); + QDECREF(rsp); + + global_qtest = to; + rsp = qmp("{ 'execute': 'migrate-set-capabilities'," + "'arguments': { " + "'capabilities': [ {" + "'capability': 'postcopy-ram'," + "'state': true } ] } }"); + g_assert(qdict_haskey(rsp, "return")); + QDECREF(rsp); + + /* 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. + */ + global_qtest = from; + rsp = qmp("{ 'execute': 'migrate_set_speed'," + "'arguments': { 'value': 100000000 } }"); + g_assert(qdict_haskey(rsp, "return")); + QDECREF(rsp); + + /* 1ms downtime - it should never finish precopy */ + rsp = qmp("{ 'execute': 'migrate_set_downtime'," + "'arguments': { 'value': 0.001 } }"); + g_assert(qdict_haskey(rsp, "return")); + QDECREF(rsp); + + + /* Wait for the first serial output from the source */ + wait_for_serial("src_serial"); + + cmd = g_strdup_printf("{ 'execute': 'migrate'," + "'arguments': { 'uri': '%s' } }", + uri); + rsp = qmp(cmd); + g_free(cmd); + g_assert(qdict_haskey(rsp, "return")); + QDECREF(rsp); + + wait_for_migration_pass(); + + rsp = return_or_event(qmp("{ 'execute': 'migrate-start-postcopy' }")); + g_assert(qdict_haskey(rsp, "return")); + QDECREF(rsp); + + if (!got_stop) { + qmp_eventwait("STOP"); + } + + global_qtest = to; + qmp_eventwait("RESUME"); + + wait_for_serial("dest_serial"); + global_qtest = from; + wait_for_migration_complete(); + + qtest_quit(from); + + global_qtest = to; + + qtest_memread(to, start_address, &dest_byte_a, 1); + + /* Destination still running, wait for a byte to change */ + do { + qtest_memread(to, start_address, &dest_byte_b, 1); + usleep(10 * 1000); + } while (dest_byte_a == dest_byte_b); + + qmp("{ 'execute' : 'stop'}"); + /* With it stopped, check nothing changes */ + qtest_memread(to, start_address, &dest_byte_c, 1); + sleep(1); + qtest_memread(to, start_address, &dest_byte_d, 1); + g_assert_cmpint(dest_byte_c, ==, dest_byte_d); + + check_guests_ram(); + + qtest_quit(to); + g_free(uri); + + global_qtest = global; + + cleanup("bootsect"); + cleanup("migsocket"); + cleanup("src_serial"); + cleanup("dest_serial"); +} + +int main(int argc, char **argv) +{ + char template[] = "/tmp/postcopy-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("/postcopy", test_migrate); + + 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; +} |