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 #include "qapi/qmp/qdict.h"
   8
   9 /*** Test Setup & Teardown ***/
  10
  11 /**
  12  * Launch QEMU with the given command line,
  13  * and then set up interrupts and our guest malloc interface.
  14  * Never returns NULL:
  15  * Terminates the application in case an error is encountered.
  16  */
  17 QOSState *qtest_vboot(QOSOps *ops, const char *cmdline_fmt, va_list ap)
  18 {
  19     char *cmdline;
  20
  21     QOSState *qs = g_new0(QOSState, 1);
  22
  23     cmdline = g_strdup_vprintf(cmdline_fmt, ap);
  24     qs->qts = qtest_init(cmdline);
  25     qs->ops = ops;
  26     if (ops) {
  27         ops->alloc_init(&qs->alloc, qs->qts, ALLOC_NO_FLAGS);
  28         qs->pcibus = ops->qpci_new(qs->qts, &qs->alloc);
  29     }
  30
  31     g_free(cmdline);
  32     return qs;
  33 }
  34
  35 /**
  36  * Launch QEMU with the given command line,
  37  * and then set up interrupts and our guest malloc interface.
  38  */
  39 QOSState *qtest_boot(QOSOps *ops, const char *cmdline_fmt, ...)
  40 {
  41     QOSState *qs;
  42     va_list ap;
  43
  44     va_start(ap, cmdline_fmt);
  45     qs = qtest_vboot(ops, cmdline_fmt, ap);
  46     va_end(ap);
  47
  48     return qs;
  49 }
  50
  51 /**
  52  * Tear down the QEMU instance.
  53  */
  54 void qtest_common_shutdown(QOSState *qs)
  55 {
  56     if (qs->ops) {
  57         if (qs->pcibus && qs->ops->qpci_free) {
  58             qs->ops->qpci_free(qs->pcibus);
  59             qs->pcibus = NULL;
  60         }
  61     }
  62     alloc_destroy(&qs->alloc);
  63     qtest_quit(qs->qts);
  64     g_free(qs);
  65 }
  66
  67 void qtest_shutdown(QOSState *qs)
  68 {
  69     if (qs->ops && qs->ops->shutdown) {
  70         qs->ops->shutdown(qs);
  71     } else {
  72         qtest_common_shutdown(qs);
  73     }
  74 }
  75
  76 void set_context(QOSState *s)
  77 {
  78     global_qtest = s->qts;
  79 }
  80
  81 static QDict *qmp_execute(QTestState *qts, const char *command)
  82 {
  83     return qtest_qmp(qts, "{ 'execute': %s }", command);
  84 }
  85
  86 void migrate(QOSState *from, QOSState *to, const char *uri)
  87 {
  88     const char *st;
  89     QDict *rsp, *sub;
  90     bool running;
  91
  92     set_context(from);
  93
  94     /* Is the machine currently running? */
  95     rsp = qmp_execute(from->qts, "query-status");
  96     g_assert(qdict_haskey(rsp, "return"));
  97     sub = qdict_get_qdict(rsp, "return");
  98     g_assert(qdict_haskey(sub, "running"));
  99     running = qdict_get_bool(sub, "running");
 100     qobject_unref(rsp);
 101
 102     /* Issue the migrate command. */
 103     rsp = qtest_qmp(from->qts,
 104                     "{ 'execute': 'migrate', 'arguments': { 'uri': %s }}",
 105                     uri);
 106     g_assert(qdict_haskey(rsp, "return"));
 107     qobject_unref(rsp);
 108
 109     /* Wait for STOP event, but only if we were running: */
 110     if (running) {
 111         qtest_qmp_eventwait(from->qts, "STOP");
 112     }
 113
 114     /* If we were running, we can wait for an event. */
 115     if (running) {
 116         migrate_allocator(&from->alloc, &to->alloc);
 117         set_context(to);
 118         qtest_qmp_eventwait(to->qts, "RESUME");
 119         return;
 120     }
 121
 122     /* Otherwise, we need to wait: poll until migration is completed. */
 123     while (1) {
 124         rsp = qmp_execute(from->qts, "query-migrate");
 125         g_assert(qdict_haskey(rsp, "return"));
 126         sub = qdict_get_qdict(rsp, "return");
 127         g_assert(qdict_haskey(sub, "status"));
 128         st = qdict_get_str(sub, "status");
 129
 130         /* "setup", "active", "completed", "failed", "cancelled" */
 131         if (strcmp(st, "completed") == 0) {
 132             qobject_unref(rsp);
 133             break;
 134         }
 135
 136         if ((strcmp(st, "setup") == 0) || (strcmp(st, "active") == 0)) {
 137             qobject_unref(rsp);
 138             g_usleep(5000);
 139             continue;
 140         }
 141
 142         fprintf(stderr, "Migration did not complete, status: %s\n", st);
 143         g_assert_not_reached();
 144     }
 145
 146     migrate_allocator(&from->alloc, &to->alloc);
 147     set_context(to);
 148 }
 149
 150 bool have_qemu_img(void)
 151 {
 152     char *rpath;
 153     const char *path = getenv("QTEST_QEMU_IMG");
 154     if (!path) {
 155         return false;
 156     }
 157
 158     rpath = realpath(path, NULL);
 159     if (!rpath) {
 160         return false;
 161     } else {
 162         free(rpath);
 163         return true;
 164     }
 165 }
 166
 167 void mkimg(const char *file, const char *fmt, unsigned size_mb)
 168 {
 169     gchar *cli;
 170     bool ret;
 171     int rc;
 172     GError *err = NULL;
 173     char *qemu_img_path;
 174     gchar *out, *out2;
 175     char *qemu_img_abs_path;
 176
 177     qemu_img_path = getenv("QTEST_QEMU_IMG");
 178     g_assert(qemu_img_path);
 179     qemu_img_abs_path = realpath(qemu_img_path, NULL);
 180     g_assert(qemu_img_abs_path);
 181
 182     cli = g_strdup_printf("%s create -f %s %s %uM", qemu_img_abs_path,
 183                           fmt, file, size_mb);
 184     ret = g_spawn_command_line_sync(cli, &out, &out2, &rc, &err);
 185     if (err || !g_spawn_check_exit_status(rc, &err)) {
 186         fprintf(stderr, "%s\n", err->message);
 187         g_error_free(err);
 188     }
 189     g_assert(ret && !err);
 190
 191     g_free(out);
 192     g_free(out2);
 193     g_free(cli);
 194     free(qemu_img_abs_path);
 195 }
 196
 197 void mkqcow2(const char *file, unsigned size_mb)
 198 {
 199     return mkimg(file, "qcow2", size_mb);
 200 }
 201
 202 void prepare_blkdebug_script(const char *debug_fn, const char *event)
 203 {
 204     FILE *debug_file = fopen(debug_fn, "w");
 205     int ret;
 206
 207     fprintf(debug_file, "[inject-error]\n");
 208     fprintf(debug_file, "event = \"%s\"\n", event);
 209     fprintf(debug_file, "errno = \"5\"\n");
 210     fprintf(debug_file, "state = \"1\"\n");
 211     fprintf(debug_file, "immediately = \"off\"\n");
 212     fprintf(debug_file, "once = \"on\"\n");
 213
 214     fprintf(debug_file, "[set-state]\n");
 215     fprintf(debug_file, "event = \"%s\"\n", event);
 216     fprintf(debug_file, "new_state = \"2\"\n");
 217     fflush(debug_file);
 218     g_assert(!ferror(debug_file));
 219
 220     ret = fclose(debug_file);
 221     g_assert(ret == 0);
 222 }
 223
 224 void generate_pattern(void *buffer, size_t len, size_t cycle_len)
 225 {
 226     int i, j;
 227     unsigned char *tx = (unsigned char *)buffer;
 228     unsigned char p;
 229     size_t *sx;
 230
 231     /* Write an indicative pattern that varies and is unique per-cycle */
 232     p = rand() % 256;
 233     for (i = 0; i < len; i++) {
 234         tx[i] = p++ % 256;
 235         if (i % cycle_len == 0) {
 236             p = rand() % 256;
 237         }
 238     }
 239
 240     /* force uniqueness by writing an id per-cycle */
 241     for (i = 0; i < len / cycle_len; i++) {
 242         j = i * cycle_len;
 243         if (j + sizeof(*sx) <= len) {
 244             sx = (size_t *)&tx[j];
 245             *sx = i;
 246         }
 247     }
 248 }