[libvirt] [PATCH 4/4] qemuDomainDiskChangeSupported: use CHECK_STREQ_NULLABLE more

[Laine Stump]

On 3/28/19 10:34 AM, Ján Tomko wrote:
> Convert the other string comparisons to use the macro.
>
> Signed-off-by: Ján Tomko <jtomko at redhat.com>
> ---
>   src/qemu/qemu_domain.c | 44 ++++++++++--------------------------------
>   1 file changed, 10 insertions(+), 34 deletions(-)
>
> diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
> index e75ea15c91..836e30decf 100644
> --- a/src/qemu/qemu_domain.c
> +++ b/src/qemu/qemu_domain.c
> @@ -9401,33 +9401,14 @@ qemuDomainDiskChangeSupported(virDomainDiskDefPtr disk,
>       CHECK_STREQ_NULLABLE(blkdeviotune.group_name,
>                            "blkdeviotune group name");
>   
> -    if (disk->serial && STRNEQ_NULLABLE(disk->serial, orig_disk->serial)) {
> -        virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
> -                       _("cannot modify field '%s' of the disk"),
> -                       "serial");
> -        return false;
> -    }


Hmmm. Well (to answer my own question from the previous patch) certainly 
in the current implementation of all these the meaining of "not 
specified" is "do not change", so I guess at the very least you're 
preserving current behavior.


Reviewed-by: Laine Stump <laine at laine.org>


> -
> -    if (disk->wwn && STRNEQ_NULLABLE(disk->wwn, orig_disk->wwn)) {
> -        virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
> -                       _("cannot modify field '%s' of the disk"),
> -                       "wwn");
> -        return false;
> -    }
> -
> -    if (disk->vendor && STRNEQ_NULLABLE(disk->vendor, orig_disk->vendor)) {
> -        virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
> -                       _("cannot modify field '%s' of the disk"),
> -                       "vendor");
> -        return false;
> -    }
> -
> -    if (disk->product && STRNEQ_NULLABLE(disk->product, orig_disk->product)) {
> -        virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
> -                       _("cannot modify field '%s' of the disk"),
> -                       "product");
> -        return false;
> -    }
> +    CHECK_STREQ_NULLABLE(serial,
> +                         "serial");
> +    CHECK_STREQ_NULLABLE(wwn,
> +                         "wwn");
> +    CHECK_STREQ_NULLABLE(vendor,
> +                         "vendor");
> +    CHECK_STREQ_NULLABLE(product,
> +                         "product");
>   
>       CHECK_EQ(cachemode, "cache", true);
>       CHECK_EQ(error_policy, "error_policy", true);
> @@ -9460,13 +9441,8 @@ qemuDomainDiskChangeSupported(virDomainDiskDefPtr disk,
>       CHECK_EQ(discard, "discard", true);
>       CHECK_EQ(iothread, "iothread", true);
>   
> -    if (disk->domain_name &&
> -        STRNEQ_NULLABLE(disk->domain_name, orig_disk->domain_name)) {
> -        virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
> -                       _("cannot modify field '%s' of the disk"),
> -                       "backenddomain");
> -        return false;
> -    }
> +    CHECK_STREQ_NULLABLE(domain_name,
> +                         "backenddomain");
>   
>       /* checks for fields stored in disk->src */
>       /* unfortunately 'readonly' and 'shared' can't be converted to tristate