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