Re: [PATCH v2 6/8] parallels: Move check of leaks to a separate function

[Denis V. Lunev]

On 11.08.2022 17:00, Alexander Ivanov wrote:
> v2: No changes.
same notes about motivation, changelog as before

> Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
> ---
>   block/parallels.c | 85 +++++++++++++++++++++++++++++------------------
>   1 file changed, 52 insertions(+), 33 deletions(-)
>
> diff --git a/block/parallels.c b/block/parallels.c
> index 12104ba5ad..8737eadfb4 100644
> --- a/block/parallels.c
> +++ b/block/parallels.c
> @@ -469,14 +469,13 @@ static int parallels_check_outside_image(BlockDriverState 
> *bs,
>       return 0;
>   }
>   
> -static int coroutine_fn parallels_co_check(BlockDriverState *bs,
> -                                           BdrvCheckResult *res,
> -                                           BdrvCheckMode fix)
> +static int parallels_check_leak(BlockDriverState *bs,
> +                                BdrvCheckResult *res,
> +                                BdrvCheckMode fix)
>   {
>       BDRVParallelsState *s = bs->opaque;
> -    int64_t size, prev_off, high_off;
> -    int ret;
> -    uint32_t i;
> +    int64_t size, off, high_off, count;
> +    int i, ret;
>   
>       size = bdrv_getlength(bs->file->bs);
>       if (size < 0) {
> @@ -484,41 +483,16 @@ static int coroutine_fn 
> parallels_co_check(BlockDriverState *bs,
>           return size;
>       }
>   
> -    qemu_co_mutex_lock(&s->lock);
> -
> -    parallels_check_unclean(bs, res, fix);
> -
> -    ret = parallels_check_outside_image(bs, res, fix);
> -    if (ret < 0) {
> -        goto out;
> -    }
> -
> -    res->bfi.total_clusters = s->bat_size;
> -    res->bfi.compressed_clusters = 0; /* compression is not supported */
> -
>       high_off = 0;
> -    prev_off = 0;
>       for (i = 0; i < s->bat_size; i++) {
> -        int64_t off = bat2sect(s, i) << BDRV_SECTOR_BITS;
> -        if (off == 0) {
> -            prev_off = 0;
> -            continue;
> -        }
> -
> -        res->bfi.allocated_clusters++;
> +        off = bat2sect(s, i) << BDRV_SECTOR_BITS;
>           if (off > high_off) {
>               high_off = off;
>           }
> -
> -        if (prev_off != 0 && (prev_off + s->cluster_size) != off) {
> -            res->bfi.fragmented_clusters++;
> -        }
> -        prev_off = off;
>       }
>   
>       res->image_end_offset = high_off + s->cluster_size;
>       if (size > res->image_end_offset) {
> -        int64_t count;
>           count = DIV_ROUND_UP(size - res->image_end_offset, s->cluster_size);
>           fprintf(stderr, "%s space leaked at the end of the image %" PRId64 
> "\n",
>                   fix & BDRV_FIX_LEAKS ? "Repairing" : "ERROR",
> @@ -536,11 +510,56 @@ static int coroutine_fn 
> parallels_co_check(BlockDriverState *bs,
>               if (ret < 0) {
>                   error_report_err(local_err);
>                   res->check_errors++;
> -                goto out;
> +                return ret;
>               }
>               res->leaks_fixed += count;
>           }
>       }
> +    return 0;
> +}
> +
> +static int coroutine_fn parallels_co_check(BlockDriverState *bs,
> +                                           BdrvCheckResult *res,
> +                                           BdrvCheckMode fix)
> +{
> +    BDRVParallelsState *s = bs->opaque;
> +    int64_t prev_off;
> +    int ret;
> +    uint32_t i;
> +
> +

please remove extra empty line. This looks like an accident
> +    qemu_co_mutex_lock(&s->lock);
> +
> +    parallels_check_unclean(bs, res, fix);
> +
> +    ret = parallels_check_outside_image(bs, res, fix);
> +    if (ret < 0) {
> +        goto out;
> +    }
> +
> +    ret = parallels_check_leak(bs, res, fix);
> +    if (ret < 0) {
> +        goto out;
> +    }
> +
> +    res->bfi.total_clusters = s->bat_size;
> +    res->bfi.compressed_clusters = 0; /* compression is not supported */
> +
> +    prev_off = 0;
> +    for (i = 0; i < s->bat_size; i++) {
> +        int64_t off = bat2sect(s, i) << BDRV_SECTOR_BITS;
> +        if (off == 0) {
> +            prev_off = 0;
> +            continue;
> +        }
> +
> +        res->bfi.allocated_clusters++;
> +
> +        if (prev_off != 0 && (prev_off + s->cluster_size) != off) {
> +            res->bfi.fragmented_clusters++;
> +        }
> +        prev_off = off;
> +    }
>   
>   out:
>       qemu_co_mutex_unlock(&s->lock);