예제 #1
0
파일: mirror.c 프로젝트: Pating/qemu-colo
void commit_active_start(BlockDriverState *bs, BlockDriverState *base,
                         int64_t speed,
                         BlockdevOnError on_error,
                         BlockCompletionFunc *cb,
                         void *opaque, Error **errp)
{
    int64_t length, base_length;
    int orig_base_flags;
    int ret;
    Error *local_err = NULL;

    orig_base_flags = bdrv_get_flags(base);

    if (bdrv_reopen(base, bs->open_flags, errp)) {
        return;
    }

    length = bdrv_getlength(bs);
    if (length < 0) {
        error_setg_errno(errp, -length,
                         "Unable to determine length of %s", bs->filename);
        goto error_restore_flags;
    }

    base_length = bdrv_getlength(base);
    if (base_length < 0) {
        error_setg_errno(errp, -base_length,
                         "Unable to determine length of %s", base->filename);
        goto error_restore_flags;
    }

    if (length > base_length) {
        ret = bdrv_truncate(base, length);
        if (ret < 0) {
            error_setg_errno(errp, -ret,
                            "Top image %s is larger than base image %s, and "
                             "resize of base image failed",
                             bs->filename, base->filename);
            goto error_restore_flags;
        }
    }

    bdrv_ref(base);
    mirror_start_job(bs, base, NULL, speed, 0, 0,
                     on_error, on_error, cb, opaque, &local_err,
                     &commit_active_job_driver, false, base);
    if (local_err) {
        error_propagate(errp, local_err);
        goto error_restore_flags;
    }

    return;

error_restore_flags:
    /* ignore error and errp for bdrv_reopen, because we want to propagate
     * the original error */
    bdrv_reopen(base, orig_base_flags, NULL);
    return;
}
예제 #2
0
static void test_sync_op_truncate(BdrvChild *c)
{
    int ret;

    /* Normal success path */
    ret = bdrv_truncate(c, 65536, PREALLOC_MODE_OFF, NULL);
    g_assert_cmpint(ret, ==, 0);

    /* Early error: Negative offset */
    ret = bdrv_truncate(c, -2, PREALLOC_MODE_OFF, NULL);
    g_assert_cmpint(ret, ==, -EINVAL);

    /* Error: Read-only image */
    c->bs->read_only = true;
    c->bs->open_flags &= ~BDRV_O_RDWR;

    ret = bdrv_truncate(c, 65536, PREALLOC_MODE_OFF, NULL);
    g_assert_cmpint(ret, ==, -EACCES);

    c->bs->read_only = false;
    c->bs->open_flags |= BDRV_O_RDWR;
}
예제 #3
0
static int block_crypto_create_generic(QCryptoBlockFormat format,
                                       const char *filename,
                                       QemuOpts *opts,
                                       Error **errp)
{
    int ret = -EINVAL;
    QCryptoBlockCreateOptions *create_opts = NULL;
    QCryptoBlock *crypto = NULL;
    struct BlockCryptoCreateData data = {
        .size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
                         BDRV_SECTOR_SIZE),
        .opts = opts,
        .filename = filename,
    };

    create_opts = block_crypto_create_opts_init(format, opts, errp);
    if (!create_opts) {
        return -1;
    }

    crypto = qcrypto_block_create(create_opts,
                                  block_crypto_init_func,
                                  block_crypto_write_func,
                                  &data,
                                  errp);

    if (!crypto) {
        ret = -EIO;
        goto cleanup;
    }

    ret = 0;
 cleanup:
    qcrypto_block_free(crypto);
    blk_unref(data.blk);
    qapi_free_QCryptoBlockCreateOptions(create_opts);
    return ret;
}

static int block_crypto_truncate(BlockDriverState *bs, int64_t offset,
                                 Error **errp)
{
    BlockCrypto *crypto = bs->opaque;
    size_t payload_offset =
        qcrypto_block_get_payload_offset(crypto->block);

    offset += payload_offset;

    return bdrv_truncate(bs->file, offset, errp);
}
예제 #4
0
파일: qemu-io.c 프로젝트: AjayMashi/x-tier
static int truncate_f(int argc, char **argv)
{
    int64_t offset;
    int ret;

    offset = cvtnum(argv[1]);
    if (offset < 0) {
        printf("non-numeric truncate argument -- %s\n", argv[1]);
        return 0;
    }

    ret = bdrv_truncate(bs, offset);
    if (ret < 0) {
        printf("truncate: %s\n", strerror(-ret));
        return 0;
    }

    return 0;
}
예제 #5
0
파일: vpc.c 프로젝트: binape/qemu
static int create_fixed_disk(BlockDriverState *bs, uint8_t *buf,
                             int64_t total_size)
{
    int ret;

    /* Add footer to total size */
    total_size += HEADER_SIZE;

    ret = bdrv_truncate(bs, total_size);
    if (ret < 0) {
        return ret;
    }

    ret = bdrv_pwrite_sync(bs, total_size - HEADER_SIZE, buf, HEADER_SIZE);
    if (ret < 0) {
        return ret;
    }

    return ret;
}
예제 #6
0
static uint32_t allocate_chunk (BlockDriverState * bs)
{
    BDRVFvdState *s = bs->opaque;

    /* Check if there is sufficient storage space. */
    if (s->used_storage + s->chunk_size > s->data_storage) {
        if (s->add_storage_cmd) {
            if (system (s->add_storage_cmd)) {
                fprintf (stderr, "Error in executing %s\n", s->add_storage_cmd);
            }
        } else {
            /* If the image is stored on a file system, the image file size
             * can be increased by bdrv_truncate. */
            int64_t new_size = (s->data_offset + s->used_storage +
                                s->storage_grow_unit) * 512;
            bdrv_truncate (s->fvd_data, new_size);
        }

        /* Check how much storage is available now. */
        int64_t size = bdrv_getlength (s->fvd_data);
        if (size < 0) {
            fprintf (stderr, "Error in bdrv_getlength(%s)\n", bs->filename);
            return EMPTY_TABLE;
        }
        s->data_storage = size / 512 - s->data_offset;
        if (s->used_storage + s->chunk_size > s->data_storage) {
            fprintf (stderr, "Could not allocate more storage space.\n");
            return EMPTY_TABLE;
        }

        QDEBUG ("Increased storage to %" PRId64 " bytes.\n", size);
    }

    uint32_t allocated_chunk_id = s->used_storage / s->chunk_size;
    s->used_storage += s->chunk_size;
    return allocated_chunk_id;
}
예제 #7
0
파일: raw.c 프로젝트: AmesianX/qemu-kvm
static int raw_truncate(BlockDriverState *bs, int64_t offset)
{
    return bdrv_truncate(bs->file, offset);
}
예제 #8
0
파일: vhdx-log.c 프로젝트: Aakriti/qemu
/* Flush the entire log (as described by 'logs') to the VHDX image
 * file, and then set the log to 'empty' status once complete.
 *
 * The log entries should be validate prior to flushing */
static int vhdx_log_flush(BlockDriverState *bs, BDRVVHDXState *s,
                          VHDXLogSequence *logs)
{
    int ret = 0;
    int i;
    uint32_t cnt, sectors_read;
    uint64_t new_file_size;
    void *data = NULL;
    VHDXLogDescEntries *desc_entries = NULL;
    VHDXLogEntryHeader hdr_tmp = { 0 };

    cnt = logs->count;

    data = qemu_blockalign(bs, VHDX_LOG_SECTOR_SIZE);

    ret = vhdx_user_visible_write(bs, s);
    if (ret < 0) {
        goto exit;
    }

    /* each iteration represents one log sequence, which may span multiple
     * sectors */
    while (cnt--) {
        ret = vhdx_log_peek_hdr(bs, &logs->log, &hdr_tmp);
        if (ret < 0) {
            goto exit;
        }
        /* if the log shows a FlushedFileOffset larger than our current file
         * size, then that means the file has been truncated / corrupted, and
         * we must refused to open it / use it */
        if (hdr_tmp.flushed_file_offset > bdrv_getlength(bs->file)) {
            ret = -EINVAL;
            goto exit;
        }

        ret = vhdx_log_read_desc(bs, s, &logs->log, &desc_entries);
        if (ret < 0) {
            goto exit;
        }

        for (i = 0; i < desc_entries->hdr.descriptor_count; i++) {
            if (!memcmp(&desc_entries->desc[i].signature, "desc", 4)) {
                /* data sector, so read a sector to flush */
                ret = vhdx_log_read_sectors(bs, &logs->log, &sectors_read,
                                            data, 1, false);
                if (ret < 0) {
                    goto exit;
                }
                if (sectors_read != 1) {
                    ret = -EINVAL;
                    goto exit;
                }
            }

            ret = vhdx_log_flush_desc(bs, &desc_entries->desc[i], data);
            if (ret < 0) {
                goto exit;
            }
        }
        if (bdrv_getlength(bs->file) < desc_entries->hdr.last_file_offset) {
            new_file_size = desc_entries->hdr.last_file_offset;
            if (new_file_size % (1024*1024)) {
                /* round up to nearest 1MB boundary */
                new_file_size = ((new_file_size >> 20) + 1) << 20;
                bdrv_truncate(bs->file, new_file_size);
            }
        }
예제 #9
0
static int cor_truncate(BlockDriverState *bs, int64_t offset,
                        PreallocMode prealloc, Error **errp)
{
    return bdrv_truncate(bs->file, offset, prealloc, errp);
}
static void coroutine_fn commit_run(void *opaque)
{
    CommitBlockJob *s = opaque;
    BlockDriverState *active = s->active;
    BlockDriverState *top = s->top;
    BlockDriverState *base = s->base;
    BlockDriverState *overlay_bs = NULL;
    int64_t sector_num, end;
    int ret = 0;
    int n = 0;
    void *buf;
    int bytes_written = 0;
    int64_t base_len;

    ret = s->common.len = bdrv_getlength(top);


    if (s->common.len < 0) {
        goto exit_restore_reopen;
    }

    ret = base_len = bdrv_getlength(base);
    if (base_len < 0) {
        goto exit_restore_reopen;
    }

    if (base_len < s->common.len) {
        ret = bdrv_truncate(base, s->common.len);
        if (ret) {
            goto exit_restore_reopen;
        }
    }

    overlay_bs = bdrv_find_overlay(active, top);

    end = s->common.len >> BDRV_SECTOR_BITS;
    buf = qemu_blockalign(top, COMMIT_BUFFER_SIZE);

    for (sector_num = 0; sector_num < end; sector_num += n) {
        uint64_t delay_ms = 0;
        bool copy;

wait:
        /* Note that even when no rate limit is applied we need to yield
         * with no pending I/O here so that qemu_aio_flush() returns.
         */
        block_job_sleep(&s->common, rt_clock, delay_ms);
        if (block_job_is_cancelled(&s->common)) {
            break;
        }
        /* Copy if allocated above the base */
        ret = bdrv_co_is_allocated_above(top, base, sector_num,
                                         COMMIT_BUFFER_SIZE / BDRV_SECTOR_SIZE,
                                         &n);
        copy = (ret == 1);
        trace_commit_one_iteration(s, sector_num, n, ret);
        if (copy) {
            if (s->common.speed) {
                delay_ms = ratelimit_calculate_delay(&s->limit, n);
                if (delay_ms > 0) {
                    goto wait;
                }
            }
            ret = commit_populate(top, base, sector_num, n, buf);
            bytes_written += n * BDRV_SECTOR_SIZE;
        }
        if (ret < 0) {
            if (s->on_error == BLOCK_ERR_STOP_ANY    ||
                s->on_error == BLOCK_ERR_REPORT      ||
                (s->on_error == BLOCK_ERR_STOP_ENOSPC && ret == -ENOSPC)) {
                goto exit_free_buf;
            } else {
                n = 0;
                continue;
            }
        }
        /* Publish progress */
        s->common.offset += n * BDRV_SECTOR_SIZE;
    }

    ret = 0;

    if (!block_job_is_cancelled(&s->common) && sector_num == end) {
        /* success */
        ret = bdrv_drop_intermediate(active, top, base);
    }

exit_free_buf:
    qemu_vfree(buf);

exit_restore_reopen:
    /* restore base open flags here if appropriate (e.g., change the base back
     * to r/o). These reopens do not need to be atomic, since we won't abort
     * even on failure here */
    if (s->base_flags != bdrv_get_flags(base)) {
        bdrv_reopen(base, s->base_flags, NULL);
    }
    if (s->orig_overlay_flags != bdrv_get_flags(overlay_bs)) {
        bdrv_reopen(overlay_bs, s->orig_overlay_flags, NULL);
    }

    block_job_complete(&s->common, ret);
}