| /* |
| * QTest testcase for migration |
| * |
| * Copyright (c) 2016-2018 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 "libqtest.h" |
| #include "qapi/qmp/qdict.h" |
| #include "qapi/qmp/qjson.h" |
| #include "qemu/option.h" |
| #include "qemu/range.h" |
| #include "qemu/sockets.h" |
| #include "chardev/char.h" |
| #include "sysemu/sysemu.h" |
| |
| /* TODO actually test the results and get rid of this */ |
| #define qtest_qmp_discard_response(...) qobject_unref(qtest_qmp(__VA_ARGS__)) |
| |
| const unsigned start_address = 1024 * 1024; |
| const unsigned end_address = 100 * 1024 * 1024; |
| bool got_stop; |
| static bool uffd_feature_thread_id; |
| |
| #if defined(__linux__) |
| #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 = 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; |
| } |
| uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID; |
| |
| 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 |
| * outputting a 'B' every so often if it's still running. |
| */ |
| #include "tests/migration/x86-a-b-bootblock.h" |
| |
| static void init_bootfile_x86(const char *bootpath) |
| { |
| FILE *bootfile = fopen(bootpath, "wb"); |
| |
| g_assert_cmpint(fwrite(x86_bootsect, 512, 1, bootfile), ==, 1); |
| fclose(bootfile); |
| } |
| |
| /* |
| * 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"); |
| const char *arch = qtest_get_arch(); |
| int started = (strcmp(side, "src_serial") == 0 && |
| strcmp(arch, "ppc64") == 0) ? 0 : 1; |
| |
| g_free(serialpath); |
| do { |
| int readvalue = fgetc(serialfile); |
| |
| if (!started) { |
| /* SLOF prints its banner before starting test, |
| * to ignore it, mark the start of the test with '_', |
| * ignore all characters until this marker |
| */ |
| switch (readvalue) { |
| case '_': |
| started = 1; |
| break; |
| case EOF: |
| fseek(serialfile, 0, SEEK_SET); |
| usleep(1000); |
| break; |
| } |
| continue; |
| } |
| switch (readvalue) { |
| case 'A': |
| /* Fine */ |
| break; |
| |
| case 'B': |
| /* It's alive! */ |
| fclose(serialfile); |
| return; |
| |
| case EOF: |
| started = (strcmp(side, "src_serial") == 0 && |
| strcmp(arch, "ppc64") == 0) ? 0 : 1; |
| 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); |
| } |
| |
| static void stop_cb(void *opaque, const char *name, QDict *data) |
| { |
| if (!strcmp(name, "STOP")) { |
| got_stop = true; |
| } |
| } |
| |
| /* |
| * Events can get in the way of responses we are actually waiting for. |
| */ |
| GCC_FMT_ATTR(2, 3) |
| static QDict *wait_command(QTestState *who, const char *command, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, command); |
| qtest_qmp_vsend(who, command, ap); |
| va_end(ap); |
| |
| return qtest_qmp_receive_success(who, stop_cb, NULL); |
| } |
| |
| /* |
| * Note: caller is responsible to free the returned object via |
| * qobject_unref() after use |
| */ |
| static QDict *migrate_query(QTestState *who) |
| { |
| return wait_command(who, "{ 'execute': 'query-migrate' }"); |
| } |
| |
| /* |
| * Note: caller is responsible to free the returned object via |
| * g_free() after use |
| */ |
| static gchar *migrate_query_status(QTestState *who) |
| { |
| QDict *rsp_return = migrate_query(who); |
| gchar *status = g_strdup(qdict_get_str(rsp_return, "status")); |
| |
| g_assert(status); |
| qobject_unref(rsp_return); |
| |
| return status; |
| } |
| |
| /* |
| * It's tricky to use qemu's migration event capability with qtest, |
| * events suddenly appearing confuse the qmp()/hmp() responses. |
| */ |
| |
| static uint64_t get_migration_pass(QTestState *who) |
| { |
| QDict *rsp_return, *rsp_ram; |
| uint64_t result; |
| |
| rsp_return = migrate_query(who); |
| 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); |
| } |
| qobject_unref(rsp_return); |
| return result; |
| } |
| |
| static void read_blocktime(QTestState *who) |
| { |
| QDict *rsp_return; |
| |
| rsp_return = migrate_query(who); |
| g_assert(qdict_haskey(rsp_return, "postcopy-blocktime")); |
| qobject_unref(rsp_return); |
| } |
| |
| static void wait_for_migration_status(QTestState *who, |
| const char *goal) |
| { |
| while (true) { |
| bool completed; |
| char *status; |
| |
| status = migrate_query_status(who); |
| completed = strcmp(status, goal) == 0; |
| g_assert_cmpstr(status, !=, "failed"); |
| g_free(status); |
| if (completed) { |
| return; |
| } |
| usleep(1000); |
| } |
| } |
| |
| static void wait_for_migration_complete(QTestState *who) |
| { |
| wait_for_migration_status(who, "completed"); |
| } |
| |
| static void wait_for_migration_pass(QTestState *who) |
| { |
| uint64_t initial_pass = get_migration_pass(who); |
| uint64_t pass; |
| |
| /* Wait for the 1st sync */ |
| while (!got_stop && !initial_pass) { |
| usleep(1000); |
| initial_pass = get_migration_pass(who); |
| } |
| |
| do { |
| usleep(1000); |
| pass = get_migration_pass(who); |
| } while (pass == initial_pass && !got_stop); |
| } |
| |
| static void check_guests_ram(QTestState *who) |
| { |
| /* 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(who, start_address, &first_byte, 1); |
| last_byte = first_byte; |
| |
| for (address = start_address + 4096; address < end_address; address += 4096) |
| { |
| uint8_t b; |
| qtest_memread(who, 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; |
| last_byte = b; |
| } 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; |
| } |
| } |
| } |
| g_assert_false(bad); |
| } |
| |
| static void cleanup(const char *filename) |
| { |
| char *path = g_strdup_printf("%s/%s", tmpfs, filename); |
| |
| unlink(path); |
| g_free(path); |
| } |
| |
| static void migrate_check_parameter(QTestState *who, const char *parameter, |
| long long value) |
| { |
| QDict *rsp_return; |
| |
| rsp_return = wait_command(who, |
| "{ 'execute': 'query-migrate-parameters' }"); |
| g_assert_cmpint(qdict_get_int(rsp_return, parameter), ==, value); |
| qobject_unref(rsp_return); |
| } |
| |
| static void migrate_set_parameter(QTestState *who, const char *parameter, |
| long long value) |
| { |
| QDict *rsp; |
| |
| rsp = qtest_qmp(who, |
| "{ 'execute': 'migrate-set-parameters'," |
| "'arguments': { %s: %lld } }", |
| parameter, value); |
| g_assert(qdict_haskey(rsp, "return")); |
| qobject_unref(rsp); |
| migrate_check_parameter(who, parameter, value); |
| } |
| |
| static void migrate_pause(QTestState *who) |
| { |
| QDict *rsp; |
| |
| rsp = wait_command(who, "{ 'execute': 'migrate-pause' }"); |
| qobject_unref(rsp); |
| } |
| |
| static void migrate_recover(QTestState *who, const char *uri) |
| { |
| QDict *rsp; |
| |
| rsp = wait_command(who, |
| "{ 'execute': 'migrate-recover', " |
| " 'id': 'recover-cmd', " |
| " 'arguments': { 'uri': %s } }", |
| uri); |
| qobject_unref(rsp); |
| } |
| |
| static void migrate_set_capability(QTestState *who, const char *capability, |
| bool value) |
| { |
| QDict *rsp; |
| |
| rsp = qtest_qmp(who, |
| "{ 'execute': 'migrate-set-capabilities'," |
| "'arguments': { " |
| "'capabilities': [ { " |
| "'capability': %s, 'state': %i } ] } }", |
| capability, value); |
| g_assert(qdict_haskey(rsp, "return")); |
| qobject_unref(rsp); |
| } |
| |
| /* |
| * Send QMP command "migrate". |
| * Arguments are built from @fmt... (formatted like |
| * qobject_from_jsonf_nofail()) with "uri": @uri spliced in. |
| */ |
| GCC_FMT_ATTR(3, 4) |
| static void migrate(QTestState *who, const char *uri, const char *fmt, ...) |
| { |
| va_list ap; |
| QDict *args, *rsp; |
| |
| va_start(ap, fmt); |
| args = qdict_from_vjsonf_nofail(fmt, ap); |
| va_end(ap); |
| |
| g_assert(!qdict_haskey(args, "uri")); |
| qdict_put_str(args, "uri", uri); |
| |
| rsp = qmp("{ 'execute': 'migrate', 'arguments': %p}", args); |
| g_assert(qdict_haskey(rsp, "return")); |
| qobject_unref(rsp); |
| } |
| |
| static void migrate_postcopy_start(QTestState *from, QTestState *to) |
| { |
| QDict *rsp; |
| |
| rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }"); |
| qobject_unref(rsp); |
| |
| if (!got_stop) { |
| qtest_qmp_eventwait(from, "STOP"); |
| } |
| |
| qtest_qmp_eventwait(to, "RESUME"); |
| } |
| |
| static int test_migrate_start(QTestState **from, QTestState **to, |
| const char *uri, bool hide_stderr) |
| { |
| gchar *cmd_src, *cmd_dst; |
| char *bootpath = g_strdup_printf("%s/bootsect", tmpfs); |
| const char *arch = qtest_get_arch(); |
| const char *accel = "kvm:tcg"; |
| |
| got_stop = false; |
| |
| if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) { |
| init_bootfile_x86(bootpath); |
| cmd_src = g_strdup_printf("-machine accel=%s -m 150M" |
| " -name source,debug-threads=on" |
| " -serial file:%s/src_serial" |
| " -drive file=%s,format=raw", |
| accel, tmpfs, bootpath); |
| cmd_dst = g_strdup_printf("-machine accel=%s -m 150M" |
| " -name target,debug-threads=on" |
| " -serial file:%s/dest_serial" |
| " -drive file=%s,format=raw" |
| " -incoming %s", |
| accel, tmpfs, bootpath, uri); |
| } else if (strcmp(arch, "ppc64") == 0) { |
| cmd_src = g_strdup_printf("-machine accel=%s -m 256M" |
| " -name source,debug-threads=on" |
| " -serial file:%s/src_serial" |
| " -prom-env '" |
| "boot-command=hex .\" _\" begin %x %x " |
| "do i c@ 1 + i c! 1000 +loop .\" B\" 0 " |
| "until'", accel, tmpfs, end_address, |
| start_address); |
| cmd_dst = g_strdup_printf("-machine accel=%s -m 256M" |
| " -name target,debug-threads=on" |
| " -serial file:%s/dest_serial" |
| " -incoming %s", |
| accel, tmpfs, uri); |
| } else { |
| g_assert_not_reached(); |
| } |
| |
| g_free(bootpath); |
| |
| if (hide_stderr) { |
| gchar *tmp; |
| tmp = g_strdup_printf("%s 2>/dev/null", cmd_src); |
| g_free(cmd_src); |
| cmd_src = tmp; |
| |
| tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst); |
| g_free(cmd_dst); |
| cmd_dst = tmp; |
| } |
| |
| *from = qtest_start(cmd_src); |
| g_free(cmd_src); |
| |
| *to = qtest_init(cmd_dst); |
| g_free(cmd_dst); |
| return 0; |
| } |
| |
| static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest) |
| { |
| unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d; |
| |
| qtest_quit(from); |
| |
| if (test_dest) { |
| 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(1000 * 10); |
| } while (dest_byte_a == dest_byte_b); |
| |
| qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}"); |
| |
| /* With it stopped, check nothing changes */ |
| qtest_memread(to, start_address, &dest_byte_c, 1); |
| usleep(1000 * 200); |
| qtest_memread(to, start_address, &dest_byte_d, 1); |
| g_assert_cmpint(dest_byte_c, ==, dest_byte_d); |
| |
| check_guests_ram(to); |
| } |
| |
| qtest_quit(to); |
| |
| cleanup("bootsect"); |
| cleanup("migsocket"); |
| cleanup("src_serial"); |
| cleanup("dest_serial"); |
| } |
| |
| static void deprecated_set_downtime(QTestState *who, const double value) |
| { |
| QDict *rsp; |
| |
| rsp = qtest_qmp(who, |
| "{ 'execute': 'migrate_set_downtime'," |
| " 'arguments': { 'value': %f } }", value); |
| g_assert(qdict_haskey(rsp, "return")); |
| qobject_unref(rsp); |
| migrate_check_parameter(who, "downtime-limit", value * 1000); |
| } |
| |
| static void deprecated_set_speed(QTestState *who, long long value) |
| { |
| QDict *rsp; |
| |
| rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed'," |
| "'arguments': { 'value': %lld } }", value); |
| g_assert(qdict_haskey(rsp, "return")); |
| qobject_unref(rsp); |
| migrate_check_parameter(who, "max-bandwidth", value); |
| } |
| |
| static void test_deprecated(void) |
| { |
| QTestState *from; |
| |
| from = qtest_start(""); |
| |
| deprecated_set_downtime(from, 0.12345); |
| deprecated_set_speed(from, 12345); |
| |
| qtest_quit(from); |
| } |
| |
| static int migrate_postcopy_prepare(QTestState **from_ptr, |
| QTestState **to_ptr, |
| bool hide_error) |
| { |
| char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs); |
| QTestState *from, *to; |
| |
| if (test_migrate_start(&from, &to, uri, hide_error)) { |
| return -1; |
| } |
| |
| migrate_set_capability(from, "postcopy-ram", true); |
| migrate_set_capability(to, "postcopy-ram", true); |
| migrate_set_capability(to, "postcopy-blocktime", 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, "{}"); |
| g_free(uri); |
| |
| wait_for_migration_pass(from); |
| |
| *from_ptr = from; |
| *to_ptr = to; |
| |
| return 0; |
| } |
| |
| static void migrate_postcopy_complete(QTestState *from, QTestState *to) |
| { |
| wait_for_migration_complete(from); |
| |
| /* Make sure we get at least one "B" on destination */ |
| wait_for_serial("dest_serial"); |
| |
| if (uffd_feature_thread_id) { |
| read_blocktime(to); |
| } |
| |
| test_migrate_end(from, to, true); |
| } |
| |
| static void test_postcopy(void) |
| { |
| QTestState *from, *to; |
| |
| if (migrate_postcopy_prepare(&from, &to, false)) { |
| return; |
| } |
| migrate_postcopy_start(from, to); |
| migrate_postcopy_complete(from, to); |
| } |
| |
| static void test_postcopy_recovery(void) |
| { |
| QTestState *from, *to; |
| char *uri; |
| |
| if (migrate_postcopy_prepare(&from, &to, true)) { |
| return; |
| } |
| |
| /* Turn postcopy speed down, 4K/s is slow enough on any machines */ |
| migrate_set_parameter(from, "max-postcopy-bandwidth", 4096); |
| |
| /* Now we start the postcopy */ |
| migrate_postcopy_start(from, to); |
| |
| /* |
| * Wait until postcopy is really started; we can only run the |
| * migrate-pause command during a postcopy |
| */ |
| wait_for_migration_status(from, "postcopy-active"); |
| |
| /* |
| * Manually stop the postcopy migration. This emulates a network |
| * failure with the migration socket |
| */ |
| migrate_pause(from); |
| |
| /* |
| * Wait for destination side to reach postcopy-paused state. The |
| * migrate-recover command can only succeed if destination machine |
| * is in the paused state |
| */ |
| wait_for_migration_status(to, "postcopy-paused"); |
| |
| /* |
| * Create a new socket to emulate a new channel that is different |
| * from the broken migration channel; tell the destination to |
| * listen to the new port |
| */ |
| uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs); |
| migrate_recover(to, uri); |
| |
| /* |
| * Try to rebuild the migration channel using the resume flag and |
| * the newly created channel |
| */ |
| wait_for_migration_status(from, "postcopy-paused"); |
| migrate(from, uri, "{'resume': true}"); |
| g_free(uri); |
| |
| /* Restore the postcopy bandwidth to unlimited */ |
| migrate_set_parameter(from, "max-postcopy-bandwidth", 0); |
| |
| migrate_postcopy_complete(from, to); |
| } |
| |
| static void test_baddest(void) |
| { |
| QTestState *from, *to; |
| QDict *rsp_return; |
| char *status; |
| bool failed; |
| |
| if (test_migrate_start(&from, &to, "tcp:0:0", true)) { |
| return; |
| } |
| migrate(from, "tcp:0:0", "{}"); |
| do { |
| status = migrate_query_status(from); |
| g_assert(!strcmp(status, "setup") || !(strcmp(status, "failed"))); |
| failed = !strcmp(status, "failed"); |
| g_free(status); |
| } while (!failed); |
| |
| /* Is the machine currently running? */ |
| rsp_return = wait_command(from, "{ 'execute': 'query-status' }"); |
| g_assert(qdict_haskey(rsp_return, "running")); |
| g_assert(qdict_get_bool(rsp_return, "running")); |
| qobject_unref(rsp_return); |
| |
| test_migrate_end(from, to, false); |
| } |
| |
| static void test_precopy_unix(void) |
| { |
| char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs); |
| QTestState *from, *to; |
| |
| if (test_migrate_start(&from, &to, uri, false)) { |
| return; |
| } |
| |
| /* 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. |
| */ |
| /* 1 ms should make it not converge*/ |
| migrate_set_parameter(from, "downtime-limit", 1); |
| /* 1GB/s */ |
| migrate_set_parameter(from, "max-bandwidth", 1000000000); |
| |
| /* Wait for the first serial output from the source */ |
| wait_for_serial("src_serial"); |
| |
| migrate(from, uri, "{}"); |
| |
| wait_for_migration_pass(from); |
| |
| /* 300 ms should converge */ |
| migrate_set_parameter(from, "downtime-limit", 300); |
| |
| if (!got_stop) { |
| qtest_qmp_eventwait(from, "STOP"); |
| } |
| |
| qtest_qmp_eventwait(to, "RESUME"); |
| |
| wait_for_serial("dest_serial"); |
| wait_for_migration_complete(from); |
| |
| test_migrate_end(from, to, true); |
| g_free(uri); |
| } |
| |
| 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; |
| } |
| |
| /* |
| * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG |
| * is touchy due to race conditions on dirty bits (especially on PPC for |
| * some reason) |
| */ |
| if (g_str_equal(qtest_get_arch(), "ppc64") && |
| access("/sys/module/kvm_hv", F_OK)) { |
| g_test_message("Skipping test: kvm_hv not available"); |
| 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_postcopy); |
| qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery); |
| qtest_add_func("/migration/deprecated", test_deprecated); |
| qtest_add_func("/migration/bad_dest", test_baddest); |
| qtest_add_func("/migration/precopy/unix", test_precopy_unix); |
| |
| 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; |
| } |