[qemu.git] / block / blkverify.c

/*
 * Block protocol for block driver correctness testing
 *
 * Copyright (C) 2010 IBM, Corp.
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */

#include <stdarg.h>
#include "qemu/sockets.h" /* for EINPROGRESS on Windows */
#include "block/block_int.h"

typedef struct {
    BlockDriverState *test_file;
} BDRVBlkverifyState;

typedef struct BlkverifyAIOCB BlkverifyAIOCB;
struct BlkverifyAIOCB {
    BlockDriverAIOCB common;
    QEMUBH *bh;

    /* Request metadata */
    bool is_write;
    int64_t sector_num;
    int nb_sectors;

    int ret;                    /* first completed request's result */
    unsigned int done;          /* completion counter */
    bool *finished;             /* completion signal for cancel */

    QEMUIOVector *qiov;         /* user I/O vector */
    QEMUIOVector raw_qiov;      /* cloned I/O vector for raw file */
    void *buf;                  /* buffer for raw file I/O */

    void (*verify)(BlkverifyAIOCB *acb);
};

static void blkverify_aio_cancel(BlockDriverAIOCB *blockacb)
{
    BlkverifyAIOCB *acb = (BlkverifyAIOCB *)blockacb;
    AioContext *aio_context = bdrv_get_aio_context(blockacb->bs);
    bool finished = false;

    /* Wait until request completes, invokes its callback, and frees itself */
    acb->finished = &finished;
    while (!finished) {
        aio_poll(aio_context, true);
    }
}

static const AIOCBInfo blkverify_aiocb_info = {
    .aiocb_size         = sizeof(BlkverifyAIOCB),
    .cancel             = blkverify_aio_cancel,
};

static void GCC_FMT_ATTR(2, 3) blkverify_err(BlkverifyAIOCB *acb,
                                             const char *fmt, ...)
{
    va_list ap;

    va_start(ap, fmt);
    fprintf(stderr, "blkverify: %s sector_num=%" PRId64 " nb_sectors=%d ",
            acb->is_write ? "write" : "read", acb->sector_num,
            acb->nb_sectors);
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
    va_end(ap);
    exit(1);
}

/* Valid blkverify filenames look like blkverify:path/to/raw_image:path/to/image */
static void blkverify_parse_filename(const char *filename, QDict *options,
                                     Error **errp)
{
    const char *c;
    QString *raw_path;


    /* Parse the blkverify: prefix */
    if (!strstart(filename, "blkverify:", &filename)) {
        /* There was no prefix; therefore, all options have to be already
           present in the QDict (except for the filename) */
        qdict_put(options, "x-image", qstring_from_str(filename));
        return;
    }

    /* Parse the raw image filename */
    c = strchr(filename, ':');
    if (c == NULL) {
        error_setg(errp, "blkverify requires raw copy and original image path");
        return;
    }

    /* TODO Implement option pass-through and set raw.filename here */
    raw_path = qstring_from_substr(filename, 0, c - filename - 1);
    qdict_put(options, "x-raw", raw_path);

    /* TODO Allow multi-level nesting and set file.filename here */
    filename = c + 1;
    qdict_put(options, "x-image", qstring_from_str(filename));
}

static QemuOptsList runtime_opts = {
    .name = "blkverify",
    .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
    .desc = {
        {
            .name = "x-raw",
            .type = QEMU_OPT_STRING,
            .help = "[internal use only, will be removed]",
        },
        {
            .name = "x-image",
            .type = QEMU_OPT_STRING,
            .help = "[internal use only, will be removed]",
        },
        { /* end of list */ }
    },
};

static int blkverify_open(BlockDriverState *bs, QDict *options, int flags,
                          Error **errp)
{
    BDRVBlkverifyState *s = bs->opaque;
    QemuOpts *opts;
    Error *local_err = NULL;
    int ret;

    opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
    qemu_opts_absorb_qdict(opts, options, &local_err);
    if (local_err) {
        error_propagate(errp, local_err);
        ret = -EINVAL;
        goto fail;
    }

    /* Open the raw file */
    assert(bs->file == NULL);
    ret = bdrv_open_image(&bs->file, qemu_opt_get(opts, "x-raw"), options,
                          "raw", flags | BDRV_O_PROTOCOL, false, &local_err);
    if (ret < 0) {
        error_propagate(errp, local_err);
        goto fail;
    }

    /* Open the test file */
    assert(s->test_file == NULL);
    ret = bdrv_open_image(&s->test_file, qemu_opt_get(opts, "x-image"), options,
                          "test", flags, false, &local_err);
    if (ret < 0) {
        error_propagate(errp, local_err);
        s->test_file = NULL;
        goto fail;
    }

    ret = 0;
fail:
    return ret;
}

static void blkverify_close(BlockDriverState *bs)
{
    BDRVBlkverifyState *s = bs->opaque;

    bdrv_unref(s->test_file);
    s->test_file = NULL;
}

static int64_t blkverify_getlength(BlockDriverState *bs)
{
    BDRVBlkverifyState *s = bs->opaque;

    return bdrv_getlength(s->test_file);
}

static BlkverifyAIOCB *blkverify_aio_get(BlockDriverState *bs, bool is_write,
                                         int64_t sector_num, QEMUIOVector *qiov,
                                         int nb_sectors,
                                         BlockDriverCompletionFunc *cb,
                                         void *opaque)
{
    BlkverifyAIOCB *acb = qemu_aio_get(&blkverify_aiocb_info, bs, cb, opaque);

    acb->bh = NULL;
    acb->is_write = is_write;
    acb->sector_num = sector_num;
    acb->nb_sectors = nb_sectors;
    acb->ret = -EINPROGRESS;
    acb->done = 0;
    acb->qiov = qiov;
    acb->buf = NULL;
    acb->verify = NULL;
    acb->finished = NULL;
    return acb;
}

static void blkverify_aio_bh(void *opaque)
{
    BlkverifyAIOCB *acb = opaque;

    qemu_bh_delete(acb->bh);
    if (acb->buf) {
        qemu_iovec_destroy(&acb->raw_qiov);
        qemu_vfree(acb->buf);
    }
    acb->common.cb(acb->common.opaque, acb->ret);
    if (acb->finished) {
        *acb->finished = true;
    }
    qemu_aio_release(acb);
}

static void blkverify_aio_cb(void *opaque, int ret)
{
    BlkverifyAIOCB *acb = opaque;

    switch (++acb->done) {
    case 1:
        acb->ret = ret;
        break;

    case 2:
        if (acb->ret != ret) {
            blkverify_err(acb, "return value mismatch %d != %d", acb->ret, ret);
        }

        if (acb->verify) {
            acb->verify(acb);
        }

        acb->bh = aio_bh_new(bdrv_get_aio_context(acb->common.bs),
                             blkverify_aio_bh, acb);
        qemu_bh_schedule(acb->bh);
        break;
    }
}

static void blkverify_verify_readv(BlkverifyAIOCB *acb)
{
    ssize_t offset = qemu_iovec_compare(acb->qiov, &acb->raw_qiov);
    if (offset != -1) {
        blkverify_err(acb, "contents mismatch in sector %" PRId64,
                      acb->sector_num + (int64_t)(offset / BDRV_SECTOR_SIZE));
    }
}

static BlockDriverAIOCB *blkverify_aio_readv(BlockDriverState *bs,
        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
        BlockDriverCompletionFunc *cb, void *opaque)
{
    BDRVBlkverifyState *s = bs->opaque;
    BlkverifyAIOCB *acb = blkverify_aio_get(bs, false, sector_num, qiov,
                                            nb_sectors, cb, opaque);

    acb->verify = blkverify_verify_readv;
    acb->buf = qemu_blockalign(bs->file, qiov->size);
    qemu_iovec_init(&acb->raw_qiov, acb->qiov->niov);
    qemu_iovec_clone(&acb->raw_qiov, qiov, acb->buf);

    bdrv_aio_readv(s->test_file, sector_num, qiov, nb_sectors,
                   blkverify_aio_cb, acb);
    bdrv_aio_readv(bs->file, sector_num, &acb->raw_qiov, nb_sectors,
                   blkverify_aio_cb, acb);
    return &acb->common;
}

static BlockDriverAIOCB *blkverify_aio_writev(BlockDriverState *bs,
        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
        BlockDriverCompletionFunc *cb, void *opaque)
{
    BDRVBlkverifyState *s = bs->opaque;
    BlkverifyAIOCB *acb = blkverify_aio_get(bs, true, sector_num, qiov,
                                            nb_sectors, cb, opaque);

    bdrv_aio_writev(s->test_file, sector_num, qiov, nb_sectors,
                    blkverify_aio_cb, acb);
    bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors,
                    blkverify_aio_cb, acb);
    return &acb->common;
}

static BlockDriverAIOCB *blkverify_aio_flush(BlockDriverState *bs,
                                             BlockDriverCompletionFunc *cb,
                                             void *opaque)
{
    BDRVBlkverifyState *s = bs->opaque;

    /* Only flush test file, the raw file is not important */
    return bdrv_aio_flush(s->test_file, cb, opaque);
}

static bool blkverify_recurse_is_first_non_filter(BlockDriverState *bs,
                                                  BlockDriverState *candidate)
{
    BDRVBlkverifyState *s = bs->opaque;

    bool perm = bdrv_recurse_is_first_non_filter(bs->file, candidate);

    if (perm) {
        return true;
    }

    return bdrv_recurse_is_first_non_filter(s->test_file, candidate);
}

/* Propagate AioContext changes to ->test_file */
static void blkverify_detach_aio_context(BlockDriverState *bs)
{
    BDRVBlkverifyState *s = bs->opaque;

    bdrv_detach_aio_context(s->test_file);
}

static void blkverify_attach_aio_context(BlockDriverState *bs,
                                         AioContext *new_context)
{
    BDRVBlkverifyState *s = bs->opaque;

    bdrv_attach_aio_context(s->test_file, new_context);
}

static BlockDriver bdrv_blkverify = {
    .format_name                      = "blkverify",
    .protocol_name                    = "blkverify",
    .instance_size                    = sizeof(BDRVBlkverifyState),

    .bdrv_parse_filename              = blkverify_parse_filename,
    .bdrv_file_open                   = blkverify_open,
    .bdrv_close                       = blkverify_close,
    .bdrv_getlength                   = blkverify_getlength,

    .bdrv_aio_readv                   = blkverify_aio_readv,
    .bdrv_aio_writev                  = blkverify_aio_writev,
    .bdrv_aio_flush                   = blkverify_aio_flush,

    .bdrv_attach_aio_context          = blkverify_attach_aio_context,
    .bdrv_detach_aio_context          = blkverify_detach_aio_context,

    .is_filter                        = true,
    .bdrv_recurse_is_first_non_filter = blkverify_recurse_is_first_non_filter,
};

static void bdrv_blkverify_init(void)
{
    bdrv_register(&bdrv_blkverify);
}

block_init(bdrv_blkverify_init);
Commit	Line	Data
d9d33417 SH	1	/*
	2	* Block protocol for block driver correctness testing
	3	*
	4	* Copyright (C) 2010 IBM, Corp.
	5	*
	6	* This work is licensed under the terms of the GNU GPL, version 2 or later.
	7	* See the COPYING file in the top-level directory.
	8	*/
	9
	10	#include <stdarg.h>
1de7afc9	11	#include "qemu/sockets.h" /* for EINPROGRESS on Windows */
737e150e	12	#include "block/block_int.h"
d9d33417 SH	13
	14	typedef struct {
	15	BlockDriverState *test_file;
	16	} BDRVBlkverifyState;
	17
	18	typedef struct BlkverifyAIOCB BlkverifyAIOCB;
	19	struct BlkverifyAIOCB {
	20	BlockDriverAIOCB common;
	21	QEMUBH *bh;
	22
	23	/* Request metadata */
	24	bool is_write;
	25	int64_t sector_num;
	26	int nb_sectors;
	27
	28	int ret; /* first completed request's result */
	29	unsigned int done; /* completion counter */
	30	bool finished; / completion signal for cancel */
	31
	32	QEMUIOVector qiov; / user I/O vector */
	33	QEMUIOVector raw_qiov; /* cloned I/O vector for raw file */
	34	void buf; / buffer for raw file I/O */
	35
	36	void (verify)(BlkverifyAIOCB acb);
	37	};
	38
	39	static void blkverify_aio_cancel(BlockDriverAIOCB *blockacb)
	40	{
	41	BlkverifyAIOCB acb = (BlkverifyAIOCB )blockacb;
9d94020b	42	AioContext *aio_context = bdrv_get_aio_context(blockacb->bs);
d9d33417 SH	43	bool finished = false;
	44
	45	/* Wait until request completes, invokes its callback, and frees itself */
	46	acb->finished = &finished;
	47	while (!finished) {
9d94020b	48	aio_poll(aio_context, true);
d9d33417 SH	49	}
	50	}
	51
d7331bed	52	static const AIOCBInfo blkverify_aiocb_info = {
d9d33417 SH	53	.aiocb_size = sizeof(BlkverifyAIOCB),
	54	.cancel = blkverify_aio_cancel,
	55	};
	56
a77cffe7 SW	57	static void GCC_FMT_ATTR(2, 3) blkverify_err(BlkverifyAIOCB *acb,
a77cffe7 SW	58	const char *fmt, ...)
d9d33417 SH	59	{
	60	va_list ap;
	61
	62	va_start(ap, fmt);
687db4ed	63	fprintf(stderr, "blkverify: %s sector_num=%" PRId64 " nb_sectors=%d ",
d9d33417 SH	64	acb->is_write ? "write" : "read", acb->sector_num,
	65	acb->nb_sectors);
	66	vfprintf(stderr, fmt, ap);
	67	fprintf(stderr, "\n");
	68	va_end(ap);
	69	exit(1);
	70	}
	71
	72	/* Valid blkverify filenames look like blkverify:path/to/raw_image:path/to/image */
16c79092 KW	73	static void blkverify_parse_filename(const char filename, QDict options,
16c79092 KW	74	Error **errp)
d9d33417	75	{
16c79092 KW	76	const char *c;
	77	QString *raw_path;
	78
d9d33417 SH	79
d9d33417 SH	80	/* Parse the blkverify: prefix */
16c79092	81	if (!strstart(filename, "blkverify:", &filename)) {
22511ad6 HR	82	/* There was no prefix; therefore, all options have to be already
	83	present in the QDict (except for the filename) */
	84	qdict_put(options, "x-image", qstring_from_str(filename));
16c79092	85	return;
d9d33417	86	}
d9d33417 SH	87
	88	/* Parse the raw image filename */
	89	c = strchr(filename, ':');
	90	if (c == NULL) {
16c79092 KW	91	error_setg(errp, "blkverify requires raw copy and original image path");
	92	return;
	93	}
	94
	95	/* TODO Implement option pass-through and set raw.filename here */
	96	raw_path = qstring_from_substr(filename, 0, c - filename - 1);
	97	qdict_put(options, "x-raw", raw_path);
	98
	99	/* TODO Allow multi-level nesting and set file.filename here */
	100	filename = c + 1;
	101	qdict_put(options, "x-image", qstring_from_str(filename));
	102	}
	103
	104	static QemuOptsList runtime_opts = {
	105	.name = "blkverify",
	106	.head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
	107	.desc = {
	108	{
	109	.name = "x-raw",
	110	.type = QEMU_OPT_STRING,
	111	.help = "[internal use only, will be removed]",
	112	},
	113	{
	114	.name = "x-image",
	115	.type = QEMU_OPT_STRING,
	116	.help = "[internal use only, will be removed]",
	117	},
	118	{ /* end of list */ }
	119	},
	120	};
	121
015a1036 HR	122	static int blkverify_open(BlockDriverState bs, QDict options, int flags,
015a1036 HR	123	Error **errp)
16c79092 KW	124	{
	125	BDRVBlkverifyState *s = bs->opaque;
	126	QemuOpts *opts;
	127	Error *local_err = NULL;
16c79092 KW	128	int ret;
16c79092 KW	129
87ea75d5	130	opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
16c79092	131	qemu_opts_absorb_qdict(opts, options, &local_err);
84d18f06	132	if (local_err) {
ca288408	133	error_propagate(errp, local_err);
16c79092 KW	134	ret = -EINVAL;
	135	goto fail;
	136	}
	137
70b6198a	138	/* Open the raw file */
f67503e5	139	assert(bs->file == NULL);
70b6198a	140	ret = bdrv_open_image(&bs->file, qemu_opt_get(opts, "x-raw"), options,
f7d9fd8c	141	"raw", flags \| BDRV_O_PROTOCOL, false, &local_err);
d9d33417	142	if (ret < 0) {
ca288408	143	error_propagate(errp, local_err);
16c79092	144	goto fail;
d9d33417	145	}
d9d33417 SH	146
d9d33417 SH	147	/* Open the test file */
f67503e5	148	assert(s->test_file == NULL);
70b6198a	149	ret = bdrv_open_image(&s->test_file, qemu_opt_get(opts, "x-image"), options,
f7d9fd8c	150	"test", flags, false, &local_err);
d9d33417	151	if (ret < 0) {
ca288408	152	error_propagate(errp, local_err);
d9d33417	153	s->test_file = NULL;
16c79092	154	goto fail;
d9d33417 SH	155	}
d9d33417 SH	156
16c79092 KW	157	ret = 0;
	158	fail:
	159	return ret;
d9d33417 SH	160	}
	161
	162	static void blkverify_close(BlockDriverState *bs)
	163	{
	164	BDRVBlkverifyState *s = bs->opaque;
	165
4f6fd349	166	bdrv_unref(s->test_file);
d9d33417 SH	167	s->test_file = NULL;
	168	}
	169
d9d33417 SH	170	static int64_t blkverify_getlength(BlockDriverState *bs)
	171	{
	172	BDRVBlkverifyState *s = bs->opaque;
	173
	174	return bdrv_getlength(s->test_file);
	175	}
	176
d9d33417 SH	177	static BlkverifyAIOCB blkverify_aio_get(BlockDriverState bs, bool is_write,
	178	int64_t sector_num, QEMUIOVector *qiov,
	179	int nb_sectors,
	180	BlockDriverCompletionFunc *cb,
	181	void *opaque)
	182	{
d7331bed	183	BlkverifyAIOCB *acb = qemu_aio_get(&blkverify_aiocb_info, bs, cb, opaque);
d9d33417 SH	184
	185	acb->bh = NULL;
	186	acb->is_write = is_write;
	187	acb->sector_num = sector_num;
	188	acb->nb_sectors = nb_sectors;
	189	acb->ret = -EINPROGRESS;
	190	acb->done = 0;
	191	acb->qiov = qiov;
	192	acb->buf = NULL;
	193	acb->verify = NULL;
	194	acb->finished = NULL;
	195	return acb;
	196	}
	197
	198	static void blkverify_aio_bh(void *opaque)
	199	{
	200	BlkverifyAIOCB *acb = opaque;
	201
	202	qemu_bh_delete(acb->bh);
	203	if (acb->buf) {
	204	qemu_iovec_destroy(&acb->raw_qiov);
	205	qemu_vfree(acb->buf);
	206	}
	207	acb->common.cb(acb->common.opaque, acb->ret);
	208	if (acb->finished) {
	209	*acb->finished = true;
	210	}
	211	qemu_aio_release(acb);
	212	}
	213
	214	static void blkverify_aio_cb(void *opaque, int ret)
	215	{
	216	BlkverifyAIOCB *acb = opaque;
	217
	218	switch (++acb->done) {
	219	case 1:
	220	acb->ret = ret;
	221	break;
	222
	223	case 2:
	224	if (acb->ret != ret) {
	225	blkverify_err(acb, "return value mismatch %d != %d", acb->ret, ret);
	226	}
	227
	228	if (acb->verify) {
	229	acb->verify(acb);
	230	}
	231
9d94020b SH	232	acb->bh = aio_bh_new(bdrv_get_aio_context(acb->common.bs),
9d94020b SH	233	blkverify_aio_bh, acb);
d9d33417 SH	234	qemu_bh_schedule(acb->bh);
	235	break;
	236	}
	237	}
	238
	239	static void blkverify_verify_readv(BlkverifyAIOCB *acb)
	240	{
f70d7f7e	241	ssize_t offset = qemu_iovec_compare(acb->qiov, &acb->raw_qiov);
d9d33417	242	if (offset != -1) {
a3133586 BS	243	blkverify_err(acb, "contents mismatch in sector %" PRId64,
a3133586 BS	244	acb->sector_num + (int64_t)(offset / BDRV_SECTOR_SIZE));
d9d33417 SH	245	}
	246	}
	247
	248	static BlockDriverAIOCB blkverify_aio_readv(BlockDriverState bs,
	249	int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
	250	BlockDriverCompletionFunc cb, void opaque)
	251	{
	252	BDRVBlkverifyState *s = bs->opaque;
	253	BlkverifyAIOCB *acb = blkverify_aio_get(bs, false, sector_num, qiov,
	254	nb_sectors, cb, opaque);
	255
	256	acb->verify = blkverify_verify_readv;
	257	acb->buf = qemu_blockalign(bs->file, qiov->size);
	258	qemu_iovec_init(&acb->raw_qiov, acb->qiov->niov);
f70d7f7e	259	qemu_iovec_clone(&acb->raw_qiov, qiov, acb->buf);
d9d33417	260
ad54ae80 PB	261	bdrv_aio_readv(s->test_file, sector_num, qiov, nb_sectors,
	262	blkverify_aio_cb, acb);
	263	bdrv_aio_readv(bs->file, sector_num, &acb->raw_qiov, nb_sectors,
	264	blkverify_aio_cb, acb);
d9d33417 SH	265	return &acb->common;
	266	}
	267
	268	static BlockDriverAIOCB blkverify_aio_writev(BlockDriverState bs,
	269	int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
	270	BlockDriverCompletionFunc cb, void opaque)
	271	{
	272	BDRVBlkverifyState *s = bs->opaque;
	273	BlkverifyAIOCB *acb = blkverify_aio_get(bs, true, sector_num, qiov,
	274	nb_sectors, cb, opaque);
	275
ad54ae80 PB	276	bdrv_aio_writev(s->test_file, sector_num, qiov, nb_sectors,
	277	blkverify_aio_cb, acb);
	278	bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors,
	279	blkverify_aio_cb, acb);
d9d33417 SH	280	return &acb->common;
	281	}
	282
	283	static BlockDriverAIOCB blkverify_aio_flush(BlockDriverState bs,
	284	BlockDriverCompletionFunc *cb,
	285	void *opaque)
	286	{
	287	BDRVBlkverifyState *s = bs->opaque;
	288
	289	/* Only flush test file, the raw file is not important */
	290	return bdrv_aio_flush(s->test_file, cb, opaque);
	291	}
	292
b5042a36 BC	293	static bool blkverify_recurse_is_first_non_filter(BlockDriverState *bs,
	294	BlockDriverState *candidate)
	295	{
	296	BDRVBlkverifyState *s = bs->opaque;
	297
	298	bool perm = bdrv_recurse_is_first_non_filter(bs->file, candidate);
	299
	300	if (perm) {
	301	return true;
	302	}
	303
	304	return bdrv_recurse_is_first_non_filter(s->test_file, candidate);
	305	}
	306
9d94020b SH	307	/* Propagate AioContext changes to ->test_file */
	308	static void blkverify_detach_aio_context(BlockDriverState *bs)
	309	{
	310	BDRVBlkverifyState *s = bs->opaque;
	311
	312	bdrv_detach_aio_context(s->test_file);
	313	}
	314
	315	static void blkverify_attach_aio_context(BlockDriverState *bs,
	316	AioContext *new_context)
	317	{
	318	BDRVBlkverifyState *s = bs->opaque;
	319
	320	bdrv_attach_aio_context(s->test_file, new_context);
	321	}
	322
d9d33417	323	static BlockDriver bdrv_blkverify = {
9d94020b SH	324	.format_name = "blkverify",
	325	.protocol_name = "blkverify",
	326	.instance_size = sizeof(BDRVBlkverifyState),
	327
	328	.bdrv_parse_filename = blkverify_parse_filename,
	329	.bdrv_file_open = blkverify_open,
	330	.bdrv_close = blkverify_close,
	331	.bdrv_getlength = blkverify_getlength,
16c79092	332
9d94020b SH	333	.bdrv_aio_readv = blkverify_aio_readv,
	334	.bdrv_aio_writev = blkverify_aio_writev,
	335	.bdrv_aio_flush = blkverify_aio_flush,
16c79092	336
9d94020b SH	337	.bdrv_attach_aio_context = blkverify_attach_aio_context,
9d94020b SH	338	.bdrv_detach_aio_context = blkverify_detach_aio_context,
f6186f49	339
9d94020b	340	.is_filter = true,
b5042a36	341	.bdrv_recurse_is_first_non_filter = blkverify_recurse_is_first_non_filter,
d9d33417 SH	342	};
	343
	344	static void bdrv_blkverify_init(void)
	345	{
	346	bdrv_register(&bdrv_blkverify);
	347	}
	348
	349	block_init(bdrv_blkverify_init);