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         qs->alloc = ops->init_allocator(qs->qts, ALLOC_NO_FLAGS);
  28         qs->pcibus = ops->qpci_init(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         if (qs->alloc && qs->ops->uninit_allocator) {
  62             qs->ops->uninit_allocator(qs->alloc);
  63             qs->alloc = NULL;
  64         }
  65     }
  66     qtest_quit(qs->qts);
  67     g_free(qs);
  68 }
  69
  70 void qtest_shutdown(QOSState *qs)
  71 {
  72     if (qs->ops && qs->ops->shutdown) {
  73         qs->ops->shutdown(qs);
  74     } else {
  75         qtest_common_shutdown(qs);
  76     }
  77 }
  78
  79 void set_context(QOSState *s)
  80 {
  81     global_qtest = s->qts;
  82 }
  83
  84 static QDict *qmp_execute(QTestState *qts, const char *command)
  85 {
  86     return qtest_qmp(qts, "{ 'execute': %s }", command);
  87 }
  88
  89 void migrate(QOSState *from, QOSState *to, const char *uri)
  90 {
  91     const char *st;
  92     QDict *rsp, *sub;
  93     bool running;
  94
  95     set_context(from);
  96
  97     /* Is the machine currently running? */
  98     rsp = qmp_execute(from->qts, "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     qobject_unref(rsp);
 104
 105     /* Issue the migrate command. */
 106     rsp = qtest_qmp(from->qts,
 107                     "{ 'execute': 'migrate', 'arguments': { 'uri': %s }}",
 108                     uri);
 109     g_assert(qdict_haskey(rsp, "return"));
 110     qobject_unref(rsp);
 111
 112     /* Wait for STOP event, but only if we were running: */
 113     if (running) {
 114         qtest_qmp_eventwait(from->qts, "STOP");
 115     }
 116
 117     /* If we were running, we can wait for an event. */
 118     if (running) {
 119         migrate_allocator(from->alloc, to->alloc);
 120         set_context(to);
 121         qtest_qmp_eventwait(to->qts, "RESUME");
 122         return;
 123     }
 124
 125     /* Otherwise, we need to wait: poll until migration is completed. */
 126     while (1) {
 127         rsp = qmp_execute(from->qts, "query-migrate");
 128         g_assert(qdict_haskey(rsp, "return"));
 129         sub = qdict_get_qdict(rsp, "return");
 130         g_assert(qdict_haskey(sub, "status"));
 131         st = qdict_get_str(sub, "status");
 132
 133         /* "setup", "active", "completed", "failed", "cancelled" */
 134         if (strcmp(st, "completed") == 0) {
 135             qobject_unref(rsp);
 136             break;
 137         }
 138
 139         if ((strcmp(st, "setup") == 0) || (strcmp(st, "active") == 0)) {
 140             qobject_unref(rsp);
 141             g_usleep(5000);
 142             continue;
 143         }
 144
 145         fprintf(stderr, "Migration did not complete, status: %s\n", st);
 146         g_assert_not_reached();
 147     }
 148
 149     migrate_allocator(from->alloc, to->alloc);
 150     set_context(to);
 151 }
 152
 153 bool have_qemu_img(void)
 154 {
 155     char *rpath;
 156     const char *path = getenv("QTEST_QEMU_IMG");
 157     if (!path) {
 158         return false;
 159     }
 160
 161     rpath = realpath(path, NULL);
 162     if (!rpath) {
 163         return false;
 164     } else {
 165         free(rpath);
 166         return true;
 167     }
 168 }
 169
 170 void mkimg(const char *file, const char *fmt, unsigned size_mb)
 171 {
 172     gchar *cli;
 173     bool ret;
 174     int rc;
 175     GError *err = NULL;
 176     char *qemu_img_path;
 177     gchar *out, *out2;
 178     char *qemu_img_abs_path;
 179
 180     qemu_img_path = getenv("QTEST_QEMU_IMG");
 181     g_assert(qemu_img_path);
 182     qemu_img_abs_path = realpath(qemu_img_path, NULL);
 183     g_assert(qemu_img_abs_path);
 184
 185     cli = g_strdup_printf("%s create -f %s %s %uM", qemu_img_abs_path,
 186                           fmt, file, size_mb);
 187     ret = g_spawn_command_line_sync(cli, &out, &out2, &rc, &err);
 188     if (err) {
 189         fprintf(stderr, "%s\n", err->message);
 190         g_error_free(err);
 191     }
 192     g_assert(ret && !err);
 193
 194     /* In glib 2.34, we have g_spawn_check_exit_status. in 2.12, we don't.
 195      * glib 2.43.91 implementation assumes that any non-zero is an error for
 196      * windows, but uses extra precautions for Linux. However,
 197      * 0 is only possible if the program exited normally, so that should be
 198      * sufficient for our purposes on all platforms, here. */
 199     if (rc) {
 200         fprintf(stderr, "qemu-img returned status code %d\n", rc);
 201     }
 202     g_assert(!rc);
 203
 204     g_free(out);
 205     g_free(out2);
 206     g_free(cli);
 207     free(qemu_img_abs_path);
 208 }
 209
 210 void mkqcow2(const char *file, unsigned size_mb)
 211 {
 212     return mkimg(file, "qcow2", size_mb);
 213 }
 214
 215 void prepare_blkdebug_script(const char *debug_fn, const char *event)
 216 {
 217     FILE *debug_file = fopen(debug_fn, "w");
 218     int ret;
 219
 220     fprintf(debug_file, "[inject-error]\n");
 221     fprintf(debug_file, "event = \"%s\"\n", event);
 222     fprintf(debug_file, "errno = \"5\"\n");
 223     fprintf(debug_file, "state = \"1\"\n");
 224     fprintf(debug_file, "immediately = \"off\"\n");
 225     fprintf(debug_file, "once = \"on\"\n");
 226
 227     fprintf(debug_file, "[set-state]\n");
 228     fprintf(debug_file, "event = \"%s\"\n", event);
 229     fprintf(debug_file, "new_state = \"2\"\n");
 230     fflush(debug_file);
 231     g_assert(!ferror(debug_file));
 232
 233     ret = fclose(debug_file);
 234     g_assert(ret == 0);
 235 }
 236
 237 void generate_pattern(void *buffer, size_t len, size_t cycle_len)
 238 {
 239     int i, j;
 240     unsigned char *tx = (unsigned char *)buffer;
 241     unsigned char p;
 242     size_t *sx;
 243
 244     /* Write an indicative pattern that varies and is unique per-cycle */
 245     p = rand() % 256;
 246     for (i = 0; i < len; i++) {
 247         tx[i] = p++ % 256;
 248         if (i % cycle_len == 0) {
 249             p = rand() % 256;
 250         }
 251     }
 252
 253     /* force uniqueness by writing an id per-cycle */
 254     for (i = 0; i < len / cycle_len; i++) {
 255         j = i * cycle_len;
 256         if (j + sizeof(*sx) <= len) {
 257             sx = (size_t *)&tx[j];
 258             *sx = i;
 259         }
 260     }
 261 }