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Re: [Qemu-devel] [PATCH v4 5/5] qcow2-refcount: don't mask corruptions u
From: |
Max Reitz |
Subject: |
Re: [Qemu-devel] [PATCH v4 5/5] qcow2-refcount: don't mask corruptions under internal errors |
Date: |
Wed, 27 Feb 2019 13:42:33 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 |
On 14.12.18 14:42, Vladimir Sementsov-Ogievskiy wrote:
> No reasons for not reporting found corruptions as corruptions in case
> of some internal errors, especially in case of just failed to fix l2
> entry (and in this case, missed corruptions may influence comparing
> logic, when we calculate difference between corruptions fields of two
> results)
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
> ---
> block/qcow2-refcount.c | 31 ++++++++++++++-----------------
> 1 file changed, 14 insertions(+), 17 deletions(-)
>
> diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
> index 8da0e91dd3..b0e006e628 100644
> --- a/block/qcow2-refcount.c
> +++ b/block/qcow2-refcount.c
[...]
> @@ -1899,19 +1899,16 @@ static int check_oflag_copied(BlockDriverState *bs,
> BdrvCheckResult *res,
> fprintf(stderr, "%s OFLAG_COPIED data cluster: "
> "l2_entry=%" PRIx64 " refcount=%" PRIu64 "\n",
> repair ? "Repairing" : "ERROR", l2_entry,
> refcount);
> - if (repair) {
> - l2_table[j] = cpu_to_be64(refcount == 1
> - ? l2_entry | QCOW_OFLAG_COPIED
> - : l2_entry & ~QCOW_OFLAG_COPIED);
> - l2_dirty++;
> - } else {
> - res->corruptions++;
> - }
> + l2_table[j] = cpu_to_be64(refcount == 1
> + ? l2_entry | QCOW_OFLAG_COPIED
> + : l2_entry & ~QCOW_OFLAG_COPIED);
> + l2_dirty++;
I found the old logic to be easier to understand, actually. It made it
clear that if !repair, the L2 table is not going to be touched.
Max
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- Re: [Qemu-devel] [PATCH v4 5/5] qcow2-refcount: don't mask corruptions under internal errors,
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