Re: [PATCH v3 4/4] qemu: block: enable the snapshot image deletion feature

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On Thu, Nov 21, 2019 at 11:00:47 +0100, Pavel Mores wrote:
> With all plumbing in place, we can now enable the new functionality.
> 
> Signed-off-by: Pavel Mores <pmores@xxxxxxxxxx>
> ---
>  src/qemu/qemu_driver.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
> index a3ff4b2177..75458f5c8a 100644
> --- a/src/qemu/qemu_driver.c
> +++ b/src/qemu/qemu_driver.c
> @@ -18496,10 +18496,10 @@ qemuDomainBlockCommit(virDomainPtr dom,
>      bool persistjob = false;
>      bool blockdev = false;
>  
> -    /* XXX Add support for COMMIT_DELETE */
>      virCheckFlags(VIR_DOMAIN_BLOCK_COMMIT_SHALLOW |
>                    VIR_DOMAIN_BLOCK_COMMIT_ACTIVE |
>                    VIR_DOMAIN_BLOCK_COMMIT_RELATIVE |
> +                  VIR_DOMAIN_BLOCK_COMMIT_DELETE |
>                    VIR_DOMAIN_BLOCK_COMMIT_BANDWIDTH_BYTES, -1);
>  
>      if (!(vm = qemuDomainObjFromDomain(dom)))
> @@ -18638,7 +18638,8 @@ qemuDomainBlockCommit(virDomainPtr dom,
>          goto endjob;

You must check that VIR_QEMU_CAPS_BLOCKDEV is enabled for this VM
otherwise the flag won't work. If blockdev isn't enabled you still must
produce an error message.

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