Re: [Qemu-devel] [Qemu-block] [PATCH 5/7] file-posix: Drop hdev_co_create_opts()

[Maxim Levitsky <mlevitsk@redhat.com>]

On Fri, 2019-07-12 at 19:35 +0200, Max Reitz wrote:
> The generic fallback implementation effectively does the same.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  block/file-posix.c | 67 ----------------------------------------------
>  1 file changed, 67 deletions(-)
> 
> diff --git a/block/file-posix.c b/block/file-posix.c
> index 4479cc7ab4..65bd6d3333 100644
> --- a/block/file-posix.c
> +++ b/block/file-posix.c
> @@ -3325,67 +3325,6 @@ static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs,
>      return raw_do_pwrite_zeroes(bs, offset, bytes, flags, true);
>  }
>  
> -static int coroutine_fn hdev_co_create_opts(const char *filename, QemuOpts *opts,
> -                                            Error **errp)
> -{
> -    int fd;
> -    int ret = 0;
> -    struct stat stat_buf;
> -    int64_t total_size = 0;
> -    bool has_prefix;
> -
> -    /* This function is used by both protocol block drivers and therefore either
> -     * of these prefixes may be given.
> -     * The return value has to be stored somewhere, otherwise this is an error
> -     * due to -Werror=unused-value. */
> -    has_prefix =
> -        strstart(filename, "host_device:", &filename) ||
> -        strstart(filename, "host_cdrom:" , &filename);
> -
> -    (void)has_prefix;
> -
> -    ret = raw_normalize_devicepath(&filename, errp);
> -    if (ret < 0) {
> -        return ret;
> -    }
> -
> -    /* Read out options */
> -    total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
> -                          BDRV_SECTOR_SIZE);
> -
> -    fd = qemu_open(filename, O_WRONLY | O_BINARY);
> -    if (fd < 0) {
> -        ret = -errno;
> -        error_setg_errno(errp, -ret, "Could not open device");
> -        return ret;
> -    }
> -
> -    if (fstat(fd, &stat_buf) < 0) {
> -        ret = -errno;
> -        error_setg_errno(errp, -ret, "Could not stat device");
> -    } else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) {
> -        error_setg(errp,
> -                   "The given file is neither a block nor a character device");
> -        ret = -ENODEV;
> -    } else if (lseek(fd, 0, SEEK_END) < total_size) {
> -        error_setg(errp, "Device is too small");
> -        ret = -ENOSPC;
> -    }
> -
> -    if (!ret && total_size) {
> -        uint8_t buf[BDRV_SECTOR_SIZE] = { 0 };
> -        int64_t zero_size = MIN(BDRV_SECTOR_SIZE, total_size);
> -        if (lseek(fd, 0, SEEK_SET) == -1) {
> -            ret = -errno;
> -        } else {
> -            ret = qemu_write_full(fd, buf, zero_size);
> -            ret = ret == zero_size ? 0 : -errno;
> -        }
> -    }
> -    qemu_close(fd);
> -    return ret;
> -}
> -
>  static BlockDriver bdrv_host_device = {
>      .format_name        = "host_device",
>      .protocol_name        = "host_device",
> @@ -3398,8 +3337,6 @@ static BlockDriver bdrv_host_device = {
>      .bdrv_reopen_prepare = raw_reopen_prepare,
>      .bdrv_reopen_commit  = raw_reopen_commit,
>      .bdrv_reopen_abort   = raw_reopen_abort,
> -    .bdrv_co_create_opts = hdev_co_create_opts,
> -    .create_opts         = &raw_create_opts,
>      .mutable_opts        = mutable_opts,
>      .bdrv_co_invalidate_cache = raw_co_invalidate_cache,
>      .bdrv_co_pwrite_zeroes = hdev_co_pwrite_zeroes,
> @@ -3525,8 +3462,6 @@ static BlockDriver bdrv_host_cdrom = {
>      .bdrv_reopen_prepare = raw_reopen_prepare,
>      .bdrv_reopen_commit  = raw_reopen_commit,
>      .bdrv_reopen_abort   = raw_reopen_abort,
> -    .bdrv_co_create_opts = hdev_co_create_opts,
> -    .create_opts         = &raw_create_opts,
>      .mutable_opts        = mutable_opts,
>      .bdrv_co_invalidate_cache = raw_co_invalidate_cache,
>  
> @@ -3659,8 +3594,6 @@ static BlockDriver bdrv_host_cdrom = {
>      .bdrv_reopen_prepare = raw_reopen_prepare,
>      .bdrv_reopen_commit  = raw_reopen_commit,
>      .bdrv_reopen_abort   = raw_reopen_abort,
> -    .bdrv_co_create_opts = hdev_co_create_opts,
> -    .create_opts        = &raw_create_opts,
>      .mutable_opts       = mutable_opts,
>  
>      .bdrv_co_preadv         = raw_co_preadv,


Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Best regards,
	Maxim Levitsky