debian/patches/extra/0002-Revert-qemu-img-convert-Don-t-pre-zero-images.patch

   1 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
   2 From: Thomas Lamprecht <t.lamprecht@proxmox.com>
   3 Date: Mon, 14 Sep 2020 19:32:21 +0200
   4 Subject: [PATCH] Revert "qemu-img convert: Don't pre-zero images"
   5
   6 This reverts commit edafc70c0c8510862f2f213a3acf7067113bcd08.
   7
   8 As it correlates with causing issues on LVM allocation
   9 https://bugzilla.proxmox.com/show_bug.cgi?id=3002
  10 ---
  11  qemu-img.c | 9 +++++++++
  12  1 file changed, 9 insertions(+)
  13
  14 diff --git a/qemu-img.c b/qemu-img.c
  15 index 9635e9c001..c7884d248a 100644
  16 --- a/qemu-img.c
  17 +++ b/qemu-img.c
  18 @@ -2079,6 +2079,15 @@ static int convert_do_copy(ImgConvertState *s)
  19          s->has_zero_init = bdrv_has_zero_init(blk_bs(s->target));
  20      }
  21
  22 +    if (!s->has_zero_init && !s->target_has_backing &&
  23 +        bdrv_can_write_zeroes_with_unmap(blk_bs(s->target)))
  24 +    {
  25 +        ret = blk_make_zero(s->target, BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK);
  26 +        if (ret == 0) {
  27 +            s->has_zero_init = true;
  28 +        }
  29 +    }
  30 +
  31      /* Allocate buffer for copied data. For compressed images, only one cluster
  32       * can be copied at a time. */
  33      if (s->compressed) {