tests/libqos/libqos.c

   1 #include "qemu/osdep.h"
   2 #include <sys/wait.h>
   3
   4 #include "libqtest.h"
   5 #include "libqos/libqos.h"
   6 #include "libqos/pci.h"
   7
   8 /*** Test Setup & Teardown ***/
   9
  10 /**
  11  * Launch QEMU with the given command line,
  12  * and then set up interrupts and our guest malloc interface.
  13  */
  14 QOSState *qtest_vboot(QOSOps *ops, const char *cmdline_fmt, va_list ap)
  15 {
  16     char *cmdline;
  17
  18     struct QOSState *qs = g_malloc(sizeof(QOSState));
  19
  20     cmdline = g_strdup_vprintf(cmdline_fmt, ap);
  21     qs->qts = qtest_start(cmdline);
  22     qs->ops = ops;
  23     if (ops) {
  24         if (ops->init_allocator) {
  25             qs->alloc = ops->init_allocator(ALLOC_NO_FLAGS);
  26         }
  27         if (ops->qpci_init && qs->alloc) {
  28             qs->pcibus = ops->qpci_init(qs->alloc);
  29         }
  30     }
  31
  32     g_free(cmdline);
  33     return qs;
  34 }
  35
  36 /**
  37  * Launch QEMU with the given command line,
  38  * and then set up interrupts and our guest malloc interface.
  39  */
  40 QOSState *qtest_boot(QOSOps *ops, const char *cmdline_fmt, ...)
  41 {
  42     QOSState *qs;
  43     va_list ap;
  44
  45     va_start(ap, cmdline_fmt);
  46     qs = qtest_vboot(ops, cmdline_fmt, ap);
  47     va_end(ap);
  48
  49     return qs;
  50 }
  51
  52 /**
  53  * Tear down the QEMU instance.
  54  */
  55 void qtest_shutdown(QOSState *qs)
  56 {
  57     if (qs->ops) {
  58         if (qs->pcibus && qs->ops->qpci_free) {
  59             qs->ops->qpci_free(qs->pcibus);
  60             qs->pcibus = NULL;
  61         }
  62         if (qs->alloc && qs->ops->uninit_allocator) {
  63             qs->ops->uninit_allocator(qs->alloc);
  64             qs->alloc = NULL;
  65         }
  66     }
  67     qtest_quit(qs->qts);
  68     g_free(qs);
  69 }
  70
  71 void set_context(QOSState *s)
  72 {
  73     global_qtest = s->qts;
  74 }
  75
  76 static QDict *qmp_execute(const char *command)
  77 {
  78     char *fmt;
  79     QDict *rsp;
  80
  81     fmt = g_strdup_printf("{ 'execute': '%s' }", command);
  82     rsp = qmp(fmt);
  83     g_free(fmt);
  84
  85     return rsp;
  86 }
  87
  88 void migrate(QOSState *from, QOSState *to, const char *uri)
  89 {
  90     const char *st;
  91     char *s;
  92     QDict *rsp, *sub;
  93     bool running;
  94
  95     set_context(from);
  96
  97     /* Is the machine currently running? */
  98     rsp = qmp_execute("query-status");
  99     g_assert(qdict_haskey(rsp, "return"));
 100     sub = qdict_get_qdict(rsp, "return");
 101     g_assert(qdict_haskey(sub, "running"));
 102     running = qdict_get_bool(sub, "running");
 103     QDECREF(rsp);
 104
 105     /* Issue the migrate command. */
 106     s = g_strdup_printf("{ 'execute': 'migrate',"
 107                         "'arguments': { 'uri': '%s' } }",
 108                         uri);
 109     rsp = qmp(s);
 110     g_free(s);
 111     g_assert(qdict_haskey(rsp, "return"));
 112     QDECREF(rsp);
 113
 114     /* Wait for STOP event, but only if we were running: */
 115     if (running) {
 116         qmp_eventwait("STOP");
 117     }
 118
 119     /* If we were running, we can wait for an event. */
 120     if (running) {
 121         migrate_allocator(from->alloc, to->alloc);
 122         set_context(to);
 123         qmp_eventwait("RESUME");
 124         return;
 125     }
 126
 127     /* Otherwise, we need to wait: poll until migration is completed. */
 128     while (1) {
 129         rsp = qmp_execute("query-migrate");
 130         g_assert(qdict_haskey(rsp, "return"));
 131         sub = qdict_get_qdict(rsp, "return");
 132         g_assert(qdict_haskey(sub, "status"));
 133         st = qdict_get_str(sub, "status");
 134
 135         /* "setup", "active", "completed", "failed", "cancelled" */
 136         if (strcmp(st, "completed") == 0) {
 137             QDECREF(rsp);
 138             break;
 139         }
 140
 141         if ((strcmp(st, "setup") == 0) || (strcmp(st, "active") == 0)) {
 142             QDECREF(rsp);
 143             g_usleep(5000);
 144             continue;
 145         }
 146
 147         fprintf(stderr, "Migration did not complete, status: %s\n", st);
 148         g_assert_not_reached();
 149     }
 150
 151     migrate_allocator(from->alloc, to->alloc);
 152     set_context(to);
 153 }
 154
 155 bool have_qemu_img(void)
 156 {
 157     char *rpath;
 158     const char *path = getenv("QTEST_QEMU_IMG");
 159     if (!path) {
 160         return false;
 161     }
 162
 163     rpath = realpath(path, NULL);
 164     if (!rpath) {
 165         return false;
 166     } else {
 167         free(rpath);
 168         return true;
 169     }
 170 }
 171
 172 void mkimg(const char *file, const char *fmt, unsigned size_mb)
 173 {
 174     gchar *cli;
 175     bool ret;
 176     int rc;
 177     GError *err = NULL;
 178     char *qemu_img_path;
 179     gchar *out, *out2;
 180     char *qemu_img_abs_path;
 181
 182     qemu_img_path = getenv("QTEST_QEMU_IMG");
 183     g_assert(qemu_img_path);
 184     qemu_img_abs_path = realpath(qemu_img_path, NULL);
 185     g_assert(qemu_img_abs_path);
 186
 187     cli = g_strdup_printf("%s create -f %s %s %uM", qemu_img_abs_path,
 188                           fmt, file, size_mb);
 189     ret = g_spawn_command_line_sync(cli, &out, &out2, &rc, &err);
 190     if (err) {
 191         fprintf(stderr, "%s\n", err->message);
 192         g_error_free(err);
 193     }
 194     g_assert(ret && !err);
 195
 196     /* In glib 2.34, we have g_spawn_check_exit_status. in 2.12, we don't.
 197      * glib 2.43.91 implementation assumes that any non-zero is an error for
 198      * windows, but uses extra precautions for Linux. However,
 199      * 0 is only possible if the program exited normally, so that should be
 200      * sufficient for our purposes on all platforms, here. */
 201     if (rc) {
 202         fprintf(stderr, "qemu-img returned status code %d\n", rc);
 203     }
 204     g_assert(!rc);
 205
 206     g_free(out);
 207     g_free(out2);
 208     g_free(cli);
 209     free(qemu_img_abs_path);
 210 }
 211
 212 void mkqcow2(const char *file, unsigned size_mb)
 213 {
 214     return mkimg(file, "qcow2", size_mb);
 215 }
 216
 217 void prepare_blkdebug_script(const char *debug_fn, const char *event)
 218 {
 219     FILE *debug_file = fopen(debug_fn, "w");
 220     int ret;
 221
 222     fprintf(debug_file, "[inject-error]\n");
 223     fprintf(debug_file, "event = \"%s\"\n", event);
 224     fprintf(debug_file, "errno = \"5\"\n");
 225     fprintf(debug_file, "state = \"1\"\n");
 226     fprintf(debug_file, "immediately = \"off\"\n");
 227     fprintf(debug_file, "once = \"on\"\n");
 228
 229     fprintf(debug_file, "[set-state]\n");
 230     fprintf(debug_file, "event = \"%s\"\n", event);
 231     fprintf(debug_file, "new_state = \"2\"\n");
 232     fflush(debug_file);
 233     g_assert(!ferror(debug_file));
 234
 235     ret = fclose(debug_file);
 236     g_assert(ret == 0);
 237 }
 238
 239 void generate_pattern(void *buffer, size_t len, size_t cycle_len)
 240 {
 241     int i, j;
 242     unsigned char *tx = (unsigned char *)buffer;
 243     unsigned char p;
 244     size_t *sx;
 245
 246     /* Write an indicative pattern that varies and is unique per-cycle */
 247     p = rand() % 256;
 248     for (i = 0; i < len; i++) {
 249         tx[i] = p++ % 256;
 250         if (i % cycle_len == 0) {
 251             p = rand() % 256;
 252         }
 253     }
 254
 255     /* force uniqueness by writing an id per-cycle */
 256     for (i = 0; i < len / cycle_len; i++) {
 257         j = i * cycle_len;
 258         if (j + sizeof(*sx) <= len) {
 259             sx = (size_t *)&tx[j];
 260             *sx = i;
 261         }
 262     }
 263 }