savevm.c 59.4 KB
Newer Older
aliguori's avatar
aliguori committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
/*
 * QEMU System Emulator
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

blueswir1's avatar
blueswir1 committed
25
#include "config-host.h"
26 27
#include "qemu-common.h"
#include "hw/hw.h"
28
#include "hw/qdev.h"
Paolo Bonzini's avatar
Paolo Bonzini committed
29
#include "net/net.h"
30
#include "monitor/monitor.h"
31
#include "sysemu/sysemu.h"
32
#include "qemu/timer.h"
33
#include "audio/audio.h"
34
#include "migration/migration.h"
35 36
#include "qemu/sockets.h"
#include "qemu/queue.h"
37
#include "sysemu/cpus.h"
38
#include "exec/memory.h"
39
#include "qmp-commands.h"
40
#include "trace.h"
41
#include "qemu/bitops.h"
42

aliguori's avatar
aliguori committed
43 44
#define SELF_ANNOUNCE_ROUNDS 5

Nolan's avatar
Nolan committed
45
#ifndef ETH_P_RARP
Stefan Berger's avatar
Stefan Berger committed
46
#define ETH_P_RARP 0x8035
Nolan's avatar
Nolan committed
47 48 49 50 51 52
#endif
#define ARP_HTYPE_ETH 0x0001
#define ARP_PTYPE_IP 0x0800
#define ARP_OP_REQUEST_REV 0x3

static int announce_self_create(uint8_t *buf,
aliguori's avatar
aliguori committed
53 54
				uint8_t *mac_addr)
{
Nolan's avatar
Nolan committed
55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
    /* Ethernet header. */
    memset(buf, 0xff, 6);         /* destination MAC addr */
    memcpy(buf + 6, mac_addr, 6); /* source MAC addr */
    *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */

    /* RARP header. */
    *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */
    *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */
    *(buf + 18) = 6; /* hardware addr length (ethernet) */
    *(buf + 19) = 4; /* protocol addr length (IPv4) */
    *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */
    memcpy(buf + 22, mac_addr, 6); /* source hw addr */
    memset(buf + 28, 0x00, 4);     /* source protocol addr */
    memcpy(buf + 32, mac_addr, 6); /* target hw addr */
    memset(buf + 38, 0x00, 4);     /* target protocol addr */

    /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
    memset(buf + 42, 0x00, 18);

    return 60; /* len (FCS will be added by hardware) */
aliguori's avatar
aliguori committed
75 76
}

77
static void qemu_announce_self_iter(NICState *nic, void *opaque)
aliguori's avatar
aliguori committed
78
{
Nolan's avatar
Nolan committed
79
    uint8_t buf[60];
80 81 82 83
    int len;

    len = announce_self_create(buf, nic->conf->macaddr.a);

Jason Wang's avatar
Jason Wang committed
84
    qemu_send_packet_raw(qemu_get_queue(nic), buf, len);
85 86 87 88 89
}


static void qemu_announce_self_once(void *opaque)
{
90 91
    static int count = SELF_ANNOUNCE_ROUNDS;
    QEMUTimer *timer = *(QEMUTimer **)opaque;
aliguori's avatar
aliguori committed
92

93 94
    qemu_foreach_nic(qemu_announce_self_iter, NULL);

Nolan's avatar
Nolan committed
95 96
    if (--count) {
        /* delay 50ms, 150ms, 250ms, ... */
97
        qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) +
Nolan's avatar
Nolan committed
98
                       50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100);
99 100 101 102 103 104 105 106 107
    } else {
	    qemu_del_timer(timer);
	    qemu_free_timer(timer);
    }
}

void qemu_announce_self(void)
{
	static QEMUTimer *timer;
108
	timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer);
109
	qemu_announce_self_once(&timer);
aliguori's avatar
aliguori committed
110 111 112 113 114 115 116 117
}

/***********************************************************/
/* savevm/loadvm support */

#define IO_BUF_SIZE 32768

struct QEMUFile {
118
    const QEMUFileOps *ops;
aliguori's avatar
aliguori committed
119 120 121 122 123 124 125 126 127
    void *opaque;
    int is_write;

    int64_t buf_offset; /* start of buffer when writing, end of buffer
                           when reading */
    int buf_index;
    int buf_size; /* 0 when writing */
    uint8_t buf[IO_BUF_SIZE];

128
    int last_error;
aliguori's avatar
aliguori committed
129 130
};

131
typedef struct QEMUFileStdio
aliguori's avatar
aliguori committed
132
{
133
    FILE *stdio_file;
aliguori's avatar
aliguori committed
134
    QEMUFile *file;
135
} QEMUFileStdio;
aliguori's avatar
aliguori committed
136 137 138 139 140 141 142

typedef struct QEMUFileSocket
{
    int fd;
    QEMUFile *file;
} QEMUFileSocket;

143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170
typedef struct {
    Coroutine *co;
    int fd;
} FDYieldUntilData;

static void fd_coroutine_enter(void *opaque)
{
    FDYieldUntilData *data = opaque;
    qemu_set_fd_handler(data->fd, NULL, NULL, NULL);
    qemu_coroutine_enter(data->co, NULL);
}

/**
 * Yield until a file descriptor becomes readable
 *
 * Note that this function clobbers the handlers for the file descriptor.
 */
static void coroutine_fn yield_until_fd_readable(int fd)
{
    FDYieldUntilData data;

    assert(qemu_in_coroutine());
    data.co = qemu_coroutine_self();
    data.fd = fd;
    qemu_set_fd_handler(fd, fd_coroutine_enter, NULL, &data);
    qemu_coroutine_yield();
}

Paolo Bonzini's avatar
Paolo Bonzini committed
171 172 173 174 175 176 177
static int socket_get_fd(void *opaque)
{
    QEMUFileSocket *s = opaque;

    return s->fd;
}

aliguori's avatar
aliguori committed
178 179 180 181 182
static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
{
    QEMUFileSocket *s = opaque;
    ssize_t len;

183
    for (;;) {
Blue Swirl's avatar
Blue Swirl committed
184
        len = qemu_recv(s->fd, buf, size, 0);
185 186 187 188
        if (len != -1) {
            break;
        }
        if (socket_error() == EAGAIN) {
189
            yield_until_fd_readable(s->fd);
190 191 192 193
        } else if (socket_error() != EINTR) {
            break;
        }
    }
aliguori's avatar
aliguori committed
194

195
    if (len == -1) {
aliguori's avatar
aliguori committed
196
        len = -socket_error();
197
    }
aliguori's avatar
aliguori committed
198 199 200 201 202 203
    return len;
}

static int socket_close(void *opaque)
{
    QEMUFileSocket *s = opaque;
204
    closesocket(s->fd);
205
    g_free(s);
aliguori's avatar
aliguori committed
206 207 208
    return 0;
}

Paolo Bonzini's avatar
Paolo Bonzini committed
209 210 211 212 213 214 215
static int stdio_get_fd(void *opaque)
{
    QEMUFileStdio *s = opaque;

    return fileno(s->stdio_file);
}

216
static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
aliguori's avatar
aliguori committed
217
{
218 219
    QEMUFileStdio *s = opaque;
    return fwrite(buf, 1, size, s->stdio_file);
aliguori's avatar
aliguori committed
220 221
}

222
static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
aliguori's avatar
aliguori committed
223
{
224 225
    QEMUFileStdio *s = opaque;
    FILE *fp = s->stdio_file;
226 227
    int bytes;

228
    for (;;) {
229 230
        clearerr(fp);
        bytes = fread(buf, 1, size, fp);
231 232 233 234
        if (bytes != 0 || !ferror(fp)) {
            break;
        }
        if (errno == EAGAIN) {
235
            yield_until_fd_readable(fileno(fp));
236 237 238 239
        } else if (errno != EINTR) {
            break;
        }
    }
240
    return bytes;
aliguori's avatar
aliguori committed
241 242
}

243 244 245
static int stdio_pclose(void *opaque)
{
    QEMUFileStdio *s = opaque;
246 247
    int ret;
    ret = pclose(s->stdio_file);
248 249 250
    if (ret == -1) {
        ret = -errno;
    }
251
    g_free(s);
252
    return ret;
253 254 255
}

static int stdio_fclose(void *opaque)
aliguori's avatar
aliguori committed
256
{
257
    QEMUFileStdio *s = opaque;
258 259 260 261
    int ret = 0;
    if (fclose(s->stdio_file) == EOF) {
        ret = -errno;
    }
262
    g_free(s);
263
    return ret;
aliguori's avatar
aliguori committed
264 265
}

266
static const QEMUFileOps stdio_pipe_read_ops = {
Paolo Bonzini's avatar
Paolo Bonzini committed
267
    .get_fd =     stdio_get_fd,
268 269 270 271 272
    .get_buffer = stdio_get_buffer,
    .close =      stdio_pclose
};

static const QEMUFileOps stdio_pipe_write_ops = {
Paolo Bonzini's avatar
Paolo Bonzini committed
273
    .get_fd =     stdio_get_fd,
274 275 276 277
    .put_buffer = stdio_put_buffer,
    .close =      stdio_pclose
};

278
QEMUFile *qemu_popen(FILE *stdio_file, const char *mode)
aliguori's avatar
aliguori committed
279
{
280
    QEMUFileStdio *s;
aliguori's avatar
aliguori committed
281

282
    if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
aliguori's avatar
aliguori committed
283 284 285 286
        fprintf(stderr, "qemu_popen: Argument validity check failed\n");
        return NULL;
    }

287
    s = g_malloc0(sizeof(QEMUFileStdio));
aliguori's avatar
aliguori committed
288

289
    s->stdio_file = stdio_file;
aliguori's avatar
aliguori committed
290 291

    if(mode[0] == 'r') {
292
        s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops);
aliguori's avatar
aliguori committed
293
    } else {
294
        s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops);
aliguori's avatar
aliguori committed
295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310
    }
    return s->file;
}

QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
{
    FILE *popen_file;

    popen_file = popen(command, mode);
    if(popen_file == NULL) {
        return NULL;
    }

    return qemu_popen(popen_file, mode);
}

311
static const QEMUFileOps stdio_file_read_ops = {
Paolo Bonzini's avatar
Paolo Bonzini committed
312
    .get_fd =     stdio_get_fd,
313 314 315 316 317
    .get_buffer = stdio_get_buffer,
    .close =      stdio_fclose
};

static const QEMUFileOps stdio_file_write_ops = {
Paolo Bonzini's avatar
Paolo Bonzini committed
318
    .get_fd =     stdio_get_fd,
319 320 321 322
    .put_buffer = stdio_put_buffer,
    .close =      stdio_fclose
};

Paolo Bonzini's avatar
Paolo Bonzini committed
323 324 325 326 327 328 329 330 331 332 333
QEMUFile *qemu_fdopen(int fd, const char *mode)
{
    QEMUFileStdio *s;

    if (mode == NULL ||
	(mode[0] != 'r' && mode[0] != 'w') ||
	mode[1] != 'b' || mode[2] != 0) {
        fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
        return NULL;
    }

334
    s = g_malloc0(sizeof(QEMUFileStdio));
Paolo Bonzini's avatar
Paolo Bonzini committed
335 336 337 338 339
    s->stdio_file = fdopen(fd, mode);
    if (!s->stdio_file)
        goto fail;

    if(mode[0] == 'r') {
340
        s->file = qemu_fopen_ops(s, &stdio_file_read_ops);
Paolo Bonzini's avatar
Paolo Bonzini committed
341
    } else {
342
        s->file = qemu_fopen_ops(s, &stdio_file_write_ops);
Paolo Bonzini's avatar
Paolo Bonzini committed
343 344 345 346
    }
    return s->file;

fail:
347
    g_free(s);
Paolo Bonzini's avatar
Paolo Bonzini committed
348 349 350
    return NULL;
}

351
static const QEMUFileOps socket_read_ops = {
Paolo Bonzini's avatar
Paolo Bonzini committed
352
    .get_fd =     socket_get_fd,
353 354 355 356
    .get_buffer = socket_get_buffer,
    .close =      socket_close
};

aliguori's avatar
aliguori committed
357 358
QEMUFile *qemu_fopen_socket(int fd)
{
359
    QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
aliguori's avatar
aliguori committed
360 361

    s->fd = fd;
362
    s->file = qemu_fopen_ops(s, &socket_read_ops);
aliguori's avatar
aliguori committed
363 364 365 366 367 368 369
    return s->file;
}

QEMUFile *qemu_fopen(const char *filename, const char *mode)
{
    QEMUFileStdio *s;

370 371 372
    if (mode == NULL ||
	(mode[0] != 'r' && mode[0] != 'w') ||
	mode[1] != 'b' || mode[2] != 0) {
Blue Swirl's avatar
Blue Swirl committed
373
        fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
374 375 376
        return NULL;
    }

377
    s = g_malloc0(sizeof(QEMUFileStdio));
aliguori's avatar
aliguori committed
378

379 380
    s->stdio_file = fopen(filename, mode);
    if (!s->stdio_file)
aliguori's avatar
aliguori committed
381
        goto fail;
lirans@il.ibm.com's avatar
lirans@il.ibm.com committed
382
    
383
    if(mode[0] == 'w') {
384
        s->file = qemu_fopen_ops(s, &stdio_file_write_ops);
385
    } else {
386
        s->file = qemu_fopen_ops(s, &stdio_file_read_ops);
387 388
    }
    return s->file;
aliguori's avatar
aliguori committed
389
fail:
390
    g_free(s);
aliguori's avatar
aliguori committed
391 392 393
    return NULL;
}

394
static int block_put_buffer(void *opaque, const uint8_t *buf,
aliguori's avatar
aliguori committed
395 396
                           int64_t pos, int size)
{
397
    bdrv_save_vmstate(opaque, buf, pos, size);
aliguori's avatar
aliguori committed
398 399 400
    return size;
}

401
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
aliguori's avatar
aliguori committed
402
{
403
    return bdrv_load_vmstate(opaque, buf, pos, size);
aliguori's avatar
aliguori committed
404 405 406 407
}

static int bdrv_fclose(void *opaque)
{
408
    return bdrv_flush(opaque);
aliguori's avatar
aliguori committed
409 410
}

411 412 413 414 415 416 417 418 419 420
static const QEMUFileOps bdrv_read_ops = {
    .get_buffer = block_get_buffer,
    .close =      bdrv_fclose
};

static const QEMUFileOps bdrv_write_ops = {
    .put_buffer = block_put_buffer,
    .close =      bdrv_fclose
};

421
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
aliguori's avatar
aliguori committed
422 423
{
    if (is_writable)
424 425
        return qemu_fopen_ops(bs, &bdrv_write_ops);
    return qemu_fopen_ops(bs, &bdrv_read_ops);
aliguori's avatar
aliguori committed
426 427
}

428
QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops)
aliguori's avatar
aliguori committed
429 430 431
{
    QEMUFile *f;

432
    f = g_malloc0(sizeof(QEMUFile));
aliguori's avatar
aliguori committed
433 434

    f->opaque = opaque;
435
    f->ops = ops;
aliguori's avatar
aliguori committed
436 437 438 439 440
    f->is_write = 0;

    return f;
}

441
int qemu_file_get_error(QEMUFile *f)
aliguori's avatar
aliguori committed
442
{
443
    return f->last_error;
aliguori's avatar
aliguori committed
444 445
}

446
static void qemu_file_set_error(QEMUFile *f, int ret)
447
{
448 449 450
    if (f->last_error == 0) {
        f->last_error = ret;
    }
451 452
}

453 454 455
/** Flushes QEMUFile buffer
 *
 */
456
static void qemu_fflush(QEMUFile *f)
aliguori's avatar
aliguori committed
457
{
458 459
    int ret = 0;

460 461 462
    if (!f->ops->put_buffer) {
        return;
    }
aliguori's avatar
aliguori committed
463
    if (f->is_write && f->buf_index > 0) {
464
        ret = f->ops->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
465
        if (ret >= 0) {
aliguori's avatar
aliguori committed
466
            f->buf_offset += f->buf_index;
467
        }
aliguori's avatar
aliguori committed
468 469
        f->buf_index = 0;
    }
470 471 472
    if (ret < 0) {
        qemu_file_set_error(f, ret);
    }
aliguori's avatar
aliguori committed
473 474 475 476 477
}

static void qemu_fill_buffer(QEMUFile *f)
{
    int len;
478
    int pending;
aliguori's avatar
aliguori committed
479

480
    if (!f->ops->get_buffer)
aliguori's avatar
aliguori committed
481 482 483 484 485
        return;

    if (f->is_write)
        abort();

486 487 488 489 490 491 492
    pending = f->buf_size - f->buf_index;
    if (pending > 0) {
        memmove(f->buf, f->buf + f->buf_index, pending);
    }
    f->buf_index = 0;
    f->buf_size = pending;

493
    len = f->ops->get_buffer(f->opaque, f->buf + pending, f->buf_offset,
494
                        IO_BUF_SIZE - pending);
aliguori's avatar
aliguori committed
495
    if (len > 0) {
496
        f->buf_size += len;
aliguori's avatar
aliguori committed
497
        f->buf_offset += len;
498
    } else if (len == 0) {
499
        qemu_file_set_error(f, -EIO);
aliguori's avatar
aliguori committed
500
    } else if (len != -EAGAIN)
501
        qemu_file_set_error(f, len);
aliguori's avatar
aliguori committed
502 503
}

Paolo Bonzini's avatar
Paolo Bonzini committed
504 505 506 507 508 509 510 511
int qemu_get_fd(QEMUFile *f)
{
    if (f->ops->get_fd) {
        return f->ops->get_fd(f->opaque);
    }
    return -1;
}

512 513 514 515 516 517 518 519 520 521
/** Closes the file
 *
 * Returns negative error value if any error happened on previous operations or
 * while closing the file. Returns 0 or positive number on success.
 *
 * The meaning of return value on success depends on the specific backend
 * being used.
 */
int qemu_fclose(QEMUFile *f)
{
522
    int ret;
523 524
    qemu_fflush(f);
    ret = qemu_file_get_error(f);
525

526 527
    if (f->ops->close) {
        int ret2 = f->ops->close(f->opaque);
528 529 530
        if (ret >= 0) {
            ret = ret2;
        }
531
    }
532 533 534 535 536 537
    /* If any error was spotted before closing, we should report it
     * instead of the close() return value.
     */
    if (f->last_error) {
        ret = f->last_error;
    }
538
    g_free(f);
aliguori's avatar
aliguori committed
539 540 541 542 543 544 545
    return ret;
}

void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
{
    int l;

546 547 548 549 550
    if (f->last_error) {
        return;
    }

    if (f->is_write == 0 && f->buf_index > 0) {
aliguori's avatar
aliguori committed
551 552 553 554 555
        fprintf(stderr,
                "Attempted to write to buffer while read buffer is not empty\n");
        abort();
    }

556
    while (size > 0) {
aliguori's avatar
aliguori committed
557 558 559 560 561 562 563 564
        l = IO_BUF_SIZE - f->buf_index;
        if (l > size)
            l = size;
        memcpy(f->buf + f->buf_index, buf, l);
        f->is_write = 1;
        f->buf_index += l;
        buf += l;
        size -= l;
565
        if (f->buf_index >= IO_BUF_SIZE) {
566 567
            qemu_fflush(f);
            if (qemu_file_get_error(f)) {
568 569
                break;
            }
570
        }
aliguori's avatar
aliguori committed
571 572 573 574 575
    }
}

void qemu_put_byte(QEMUFile *f, int v)
{
576 577 578 579 580
    if (f->last_error) {
        return;
    }

    if (f->is_write == 0 && f->buf_index > 0) {
aliguori's avatar
aliguori committed
581 582 583 584 585 586 587
        fprintf(stderr,
                "Attempted to write to buffer while read buffer is not empty\n");
        abort();
    }

    f->buf[f->buf_index++] = v;
    f->is_write = 1;
588
    if (f->buf_index >= IO_BUF_SIZE) {
589
        qemu_fflush(f);
590
    }
aliguori's avatar
aliguori committed
591 592
}

593
static void qemu_file_skip(QEMUFile *f, int size)
aliguori's avatar
aliguori committed
594
{
595 596 597 598 599 600
    if (f->buf_index + size <= f->buf_size) {
        f->buf_index += size;
    }
}

static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset)
aliguori's avatar
aliguori committed
601
{
602 603
    int pending;
    int index;
aliguori's avatar
aliguori committed
604

605
    if (f->is_write) {
aliguori's avatar
aliguori committed
606
        abort();
607
    }
aliguori's avatar
aliguori committed
608

609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638
    index = f->buf_index + offset;
    pending = f->buf_size - index;
    if (pending < size) {
        qemu_fill_buffer(f);
        index = f->buf_index + offset;
        pending = f->buf_size - index;
    }

    if (pending <= 0) {
        return 0;
    }
    if (size > pending) {
        size = pending;
    }

    memcpy(buf, f->buf + index, size);
    return size;
}

int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size)
{
    int pending = size;
    int done = 0;

    while (pending > 0) {
        int res;

        res = qemu_peek_buffer(f, buf, pending, 0);
        if (res == 0) {
            return done;
aliguori's avatar
aliguori committed
639
        }
640 641 642 643
        qemu_file_skip(f, res);
        buf += res;
        pending -= res;
        done += res;
aliguori's avatar
aliguori committed
644
    }
645
    return done;
aliguori's avatar
aliguori committed
646 647
}

648
static int qemu_peek_byte(QEMUFile *f, int offset)
Juan Quintela's avatar
Juan Quintela committed
649
{
650 651
    int index = f->buf_index + offset;

652
    if (f->is_write) {
Juan Quintela's avatar
Juan Quintela committed
653
        abort();
654
    }
Juan Quintela's avatar
Juan Quintela committed
655

656
    if (index >= f->buf_size) {
Juan Quintela's avatar
Juan Quintela committed
657
        qemu_fill_buffer(f);
658 659
        index = f->buf_index + offset;
        if (index >= f->buf_size) {
Juan Quintela's avatar
Juan Quintela committed
660
            return 0;
661
        }
Juan Quintela's avatar
Juan Quintela committed
662
    }
663
    return f->buf[index];
Juan Quintela's avatar
Juan Quintela committed
664 665
}

aliguori's avatar
aliguori committed
666 667
int qemu_get_byte(QEMUFile *f)
{
668
    int result;
aliguori's avatar
aliguori committed
669

670 671
    result = qemu_peek_byte(f, 0);
    qemu_file_skip(f, 1);
672
    return result;
aliguori's avatar
aliguori committed
673 674
}

675
int64_t qemu_ftell(QEMUFile *f)
aliguori's avatar
aliguori committed
676
{
677 678 679 680 681 682
    /* buf_offset excludes buffer for writing but includes it for reading */
    if (f->is_write) {
        return f->buf_offset + f->buf_index;
    } else {
        return f->buf_offset - f->buf_size + f->buf_index;
    }
aliguori's avatar
aliguori committed
683 684 685 686
}

int qemu_file_rate_limit(QEMUFile *f)
{
687 688
    if (f->ops->rate_limit)
        return f->ops->rate_limit(f->opaque);
aliguori's avatar
aliguori committed
689 690 691 692

    return 0;
}

693
int64_t qemu_file_get_rate_limit(QEMUFile *f)
lirans@il.ibm.com's avatar
lirans@il.ibm.com committed
694
{
695 696
    if (f->ops->get_rate_limit)
        return f->ops->get_rate_limit(f->opaque);
lirans@il.ibm.com's avatar
lirans@il.ibm.com committed
697 698 699 700

    return 0;
}

701
int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate)
702
{
703 704
    /* any failed or completed migration keeps its state to allow probing of
     * migration data, but has no associated file anymore */
705 706
    if (f && f->ops->set_rate_limit)
        return f->ops->set_rate_limit(f->opaque, new_rate);
707 708 709 710

    return 0;
}

aliguori's avatar
aliguori committed
711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756
void qemu_put_be16(QEMUFile *f, unsigned int v)
{
    qemu_put_byte(f, v >> 8);
    qemu_put_byte(f, v);
}

void qemu_put_be32(QEMUFile *f, unsigned int v)
{
    qemu_put_byte(f, v >> 24);
    qemu_put_byte(f, v >> 16);
    qemu_put_byte(f, v >> 8);
    qemu_put_byte(f, v);
}

void qemu_put_be64(QEMUFile *f, uint64_t v)
{
    qemu_put_be32(f, v >> 32);
    qemu_put_be32(f, v);
}

unsigned int qemu_get_be16(QEMUFile *f)
{
    unsigned int v;
    v = qemu_get_byte(f) << 8;
    v |= qemu_get_byte(f);
    return v;
}

unsigned int qemu_get_be32(QEMUFile *f)
{
    unsigned int v;
    v = qemu_get_byte(f) << 24;
    v |= qemu_get_byte(f) << 16;
    v |= qemu_get_byte(f) << 8;
    v |= qemu_get_byte(f);
    return v;
}

uint64_t qemu_get_be64(QEMUFile *f)
{
    uint64_t v;
    v = (uint64_t)qemu_get_be32(f) << 32;
    v |= qemu_get_be32(f);
    return v;
}

757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780

/* timer */

void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
{
    uint64_t expire_time;

    expire_time = qemu_timer_expire_time_ns(ts);
    qemu_put_be64(f, expire_time);
}

void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
{
    uint64_t expire_time;

    expire_time = qemu_get_be64(f);
    if (expire_time != -1) {
        qemu_mod_timer_ns(ts, expire_time);
    } else {
        qemu_del_timer(ts);
    }
}


Gerd Hoffmann's avatar
Gerd Hoffmann committed
781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801
/* bool */

static int get_bool(QEMUFile *f, void *pv, size_t size)
{
    bool *v = pv;
    *v = qemu_get_byte(f);
    return 0;
}

static void put_bool(QEMUFile *f, void *pv, size_t size)
{
    bool *v = pv;
    qemu_put_byte(f, *v);
}

const VMStateInfo vmstate_info_bool = {
    .name = "bool",
    .get  = get_bool,
    .put  = put_bool,
};

802 803 804 805 806 807 808 809 810
/* 8 bit int */

static int get_int8(QEMUFile *f, void *pv, size_t size)
{
    int8_t *v = pv;
    qemu_get_s8s(f, v);
    return 0;
}

811
static void put_int8(QEMUFile *f, void *pv, size_t size)
812
{
813
    int8_t *v = pv;
814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831
    qemu_put_s8s(f, v);
}

const VMStateInfo vmstate_info_int8 = {
    .name = "int8",
    .get  = get_int8,
    .put  = put_int8,
};

/* 16 bit int */

static int get_int16(QEMUFile *f, void *pv, size_t size)
{
    int16_t *v = pv;
    qemu_get_sbe16s(f, v);
    return 0;
}

832
static void put_int16(QEMUFile *f, void *pv, size_t size)
833
{
834
    int16_t *v = pv;
835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852
    qemu_put_sbe16s(f, v);
}

const VMStateInfo vmstate_info_int16 = {
    .name = "int16",
    .get  = get_int16,
    .put  = put_int16,
};

/* 32 bit int */

static int get_int32(QEMUFile *f, void *pv, size_t size)
{
    int32_t *v = pv;
    qemu_get_sbe32s(f, v);
    return 0;
}

853
static void put_int32(QEMUFile *f, void *pv, size_t size)
854
{
855
    int32_t *v = pv;
856 857 858 859 860 861 862 863 864
    qemu_put_sbe32s(f, v);
}

const VMStateInfo vmstate_info_int32 = {
    .name = "int32",
    .get  = get_int32,
    .put  = put_int32,
};

865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884
/* 32 bit int. See that the received value is the same than the one
   in the field */

static int get_int32_equal(QEMUFile *f, void *pv, size_t size)
{
    int32_t *v = pv;
    int32_t v2;
    qemu_get_sbe32s(f, &v2);

    if (*v == v2)
        return 0;
    return -EINVAL;
}

const VMStateInfo vmstate_info_int32_equal = {
    .name = "int32 equal",
    .get  = get_int32_equal,
    .put  = put_int32,
};

885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904
/* 32 bit int. See that the received value is the less or the same
   than the one in the field */

static int get_int32_le(QEMUFile *f, void *pv, size_t size)
{
    int32_t *old = pv;
    int32_t new;
    qemu_get_sbe32s(f, &new);

    if (*old <= new)
        return 0;
    return -EINVAL;
}

const VMStateInfo vmstate_info_int32_le = {
    .name = "int32 equal",
    .get  = get_int32_le,
    .put  = put_int32,
};

905 906 907 908 909 910 911 912 913
/* 64 bit int */

static int get_int64(QEMUFile *f, void *pv, size_t size)
{
    int64_t *v = pv;
    qemu_get_sbe64s(f, v);
    return 0;
}

914
static void put_int64(QEMUFile *f, void *pv, size_t size)
915
{
916
    int64_t *v = pv;
917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
    qemu_put_sbe64s(f, v);
}

const VMStateInfo vmstate_info_int64 = {
    .name = "int64",
    .get  = get_int64,
    .put  = put_int64,
};

/* 8 bit unsigned int */

static int get_uint8(QEMUFile *f, void *pv, size_t size)
{
    uint8_t *v = pv;
    qemu_get_8s(f, v);
    return 0;
}

935
static void put_uint8(QEMUFile *f, void *pv, size_t size)
936
{
937
    uint8_t *v = pv;
938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955
    qemu_put_8s(f, v);
}

const VMStateInfo vmstate_info_uint8 = {
    .name = "uint8",
    .get  = get_uint8,
    .put  = put_uint8,
};

/* 16 bit unsigned int */

static int get_uint16(QEMUFile *f, void *pv, size_t size)
{
    uint16_t *v = pv;
    qemu_get_be16s(f, v);
    return 0;
}

956
static void put_uint16(QEMUFile *f, void *pv, size_t size)
957
{
958
    uint16_t *v = pv;
959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976
    qemu_put_be16s(f, v);
}

const VMStateInfo vmstate_info_uint16 = {
    .name = "uint16",
    .get  = get_uint16,
    .put  = put_uint16,
};

/* 32 bit unsigned int */

static int get_uint32(QEMUFile *f, void *pv, size_t size)
{
    uint32_t *v = pv;
    qemu_get_be32s(f, v);
    return 0;
}

977
static void put_uint32(QEMUFile *f, void *pv, size_t size)
978
{
979
    uint32_t *v = pv;
980 981 982 983 984 985 986 987 988
    qemu_put_be32s(f, v);
}

const VMStateInfo vmstate_info_uint32 = {
    .name = "uint32",
    .get  = get_uint32,
    .put  = put_uint32,
};

989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009
/* 32 bit uint. See that the received value is the same than the one
   in the field */

static int get_uint32_equal(QEMUFile *f, void *pv, size_t size)
{
    uint32_t *v = pv;
    uint32_t v2;
    qemu_get_be32s(f, &v2);

    if (*v == v2) {
        return 0;
    }
    return -EINVAL;
}

const VMStateInfo vmstate_info_uint32_equal = {
    .name = "uint32 equal",
    .get  = get_uint32_equal,
    .put  = put_uint32,
};

1010 1011 1012 1013 1014 1015 1016 1017 1018
/* 64 bit unsigned int */

static int get_uint64(QEMUFile *f, void *pv, size_t size)
{
    uint64_t *v = pv;
    qemu_get_be64s(f, v);
    return 0;
}

1019
static void put_uint64(QEMUFile *f, void *pv, size_t size)
1020
{
1021
    uint64_t *v = pv;
1022 1023 1024 1025 1026 1027 1028 1029 1030
    qemu_put_be64s(f, v);
}

const VMStateInfo vmstate_info_uint64 = {
    .name = "uint64",
    .get  = get_uint64,
    .put  = put_uint64,
};

1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
/* 8 bit int. See that the received value is the same than the one
   in the field */

static int get_uint8_equal(QEMUFile *f, void *pv, size_t size)
{
    uint8_t *v = pv;
    uint8_t v2;
    qemu_get_8s(f, &v2);

    if (*v == v2)
        return 0;
    return -EINVAL;
}

const VMStateInfo vmstate_info_uint8_equal = {
1046
    .name = "uint8 equal",
1047 1048 1049 1050
    .get  = get_uint8_equal,
    .put  = put_uint8,
};

1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070
/* 16 bit unsigned int int. See that the received value is the same than the one
   in the field */

static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
{
    uint16_t *v = pv;
    uint16_t v2;
    qemu_get_be16s(f, &v2);

    if (*v == v2)
        return 0;
    return -EINVAL;
}

const VMStateInfo vmstate_info_uint16_equal = {
    .name = "uint16 equal",
    .get  = get_uint16_equal,
    .put  = put_uint16,
};

1071 1072 1073 1074 1075 1076 1077 1078 1079
/* timers  */

static int get_timer(QEMUFile *f, void *pv, size_t size)
{
    QEMUTimer *v = pv;
    qemu_get_timer(f, v);
    return 0;
}

1080
static void put_timer(QEMUFile *f, void *pv, size_t size)
1081
{
1082
    QEMUTimer *v = pv;
1083 1084 1085 1086 1087 1088 1089 1090 1091
    qemu_put_timer(f, v);
}

const VMStateInfo vmstate_info_timer = {
    .name = "timer",
    .get  = get_timer,
    .put  = put_timer,
};