Re: [PATCH v3 3/6] migration/tls: add MigrationState and tls_hostname into MultiFDSendParams

["Daniel P. Berrangé" <berrange@redhat.com>]

On Sun, Sep 13, 2020 at 10:47:33AM +0800, Chuan Zheng wrote:
> MigrationState is need for tls session build and tls hostname is need
> for tls handshake, add both MigrationState and tls_hostname
> into MultiFDSendParams.
> 
> Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
> Signed-off-by: Yan Jin <jinyan12@huawei.com>
> ---
>  migration/multifd.c | 5 +++++
>  migration/multifd.h | 4 ++++
>  2 files changed, 9 insertions(+)
> 
> diff --git a/migration/multifd.c b/migration/multifd.c
> index d044120..3e41d9e 100644
> --- a/migration/multifd.c
> +++ b/migration/multifd.c
> @@ -543,11 +543,14 @@ void multifd_save_cleanup(void)
>  
>          socket_send_channel_destroy(p->c);
>          p->c = NULL;
> +        p->s = NULL;
>          qemu_mutex_destroy(&p->mutex);
>          qemu_sem_destroy(&p->sem);
>          qemu_sem_destroy(&p->sem_sync);
>          g_free(p->name);
>          p->name = NULL;
> +        g_free(p->tls_hostname);
> +        p->tls_hostname = NULL;
>          multifd_pages_clear(p->pages);
>          p->pages = NULL;
>          p->packet_len = 0;
> @@ -779,6 +782,8 @@ int multifd_save_setup(Error **errp)
>          p->packet->magic = cpu_to_be32(MULTIFD_MAGIC);
>          p->packet->version = cpu_to_be32(MULTIFD_VERSION);
>          p->name = g_strdup_printf("multifdsend_%d", i);
> +        p->s = migrate_get_current();
> +        p->tls_hostname = g_strdup(p->s->hostname);
>          socket_send_channel_create(multifd_new_send_channel_async, p);
>      }
>  
> diff --git a/migration/multifd.h b/migration/multifd.h
> index 448a03d..2b400e7 100644
> --- a/migration/multifd.h
> +++ b/migration/multifd.h
> @@ -66,11 +66,15 @@ typedef struct {
>  } MultiFDPages_t;
>  
>  typedef struct {
> +    /* Migration State */
> +    MigrationState *s;
>      /* this fields are not changed once the thread is created */
>      /* channel number */
>      uint8_t id;
>      /* channel thread name */
>      char *name;
> +    /* tls hostname */
> +    char *tls_hostname;

Why do we need this, when it is already accessible from the
MigrationState field you're adding


Regards,
Daniel
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