Re: [PATCH v9 09/10] migration: Implement MigrateChannelList to hmp migration flow.

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

On Fri, Jul 21, 2023 at 02:49:35PM +0000, Het Gala wrote:
> Integrate MigrateChannelList with all transport backends
> (socket, exec and rdma) for both src and dest migration
> endpoints for hmp migration.
> 
> Suggested-by: Aravind Retnakaran <aravind.retnakaran@nutanix.com>
> Signed-off-by: Het Gala <het.gala@nutanix.com>
> ---
>  migration/migration-hmp-cmds.c | 16 +++++++++++++---
>  migration/migration.c          |  5 ++---
>  migration/migration.h          |  3 ++-
>  3 files changed, 17 insertions(+), 7 deletions(-)
> 
> diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c
> index 49b150f33f..25f51ec99c 100644
> --- a/migration/migration-hmp-cmds.c
> +++ b/migration/migration-hmp-cmds.c
> @@ -423,10 +423,14 @@ void hmp_migrate_incoming(Monitor *mon, const QDict *qdict)
>  {
>      Error *err = NULL;
>      const char *uri = qdict_get_str(qdict, "uri");
> +    MigrationChannelList *caps = NULL;
> +    g_autoptr(MigrationChannel) channel = g_new0(MigrationChannel, 1);
>  
> -    qmp_migrate_incoming(uri, false, NULL, &err);
> +    migrate_uri_parse(uri, &channel, &err);
> +    QAPI_LIST_PREPEND(caps, channel);
>  
> -    hmp_handle_error(mon, err);
> +    qmp_migrate_incoming(NULL, true, caps, &err);
> +    qapi_free_MigrationChannelList(caps);

IIRC, you still need the hmp_handle_error call to print any
error message.

>  }
>  
>  void hmp_migrate_recover(Monitor *mon, const QDict *qdict)
> @@ -704,9 +708,15 @@ void hmp_migrate(Monitor *mon, const QDict *qdict)
>      bool resume = qdict_get_try_bool(qdict, "resume", false);
>      const char *uri = qdict_get_str(qdict, "uri");
>      Error *err = NULL;
> +    MigrationChannelList *caps = NULL;
> +    g_autoptr(MigrationChannel) channel = g_new0(MigrationChannel, 1);
> +
> +    migrate_uri_parse(uri, &channel, &err);
> +    QAPI_LIST_PREPEND(caps, channel);
>  
> -    qmp_migrate(uri, false, NULL, !!blk, blk, !!inc, inc,
> +    qmp_migrate(NULL, true, caps, !!blk, blk, !!inc, inc,
>                   false, false, true, resume, &err);
> +    qapi_free_MigrationChannelList(caps);
>      if (hmp_handle_error(mon, err)) {
>          return;
>      }
> diff --git a/migration/migration.c b/migration/migration.c
> index acf80b3590..cf063a76df 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -425,9 +425,8 @@ void migrate_add_address(SocketAddress *address)
>                        QAPI_CLONE(SocketAddress, address));
>  }
>  
> -static bool migrate_uri_parse(const char *uri,
> -                              MigrationChannel **channel,
> -                              Error **errp)
> +bool migrate_uri_parse(const char *uri, MigrationChannel **channel,
> +                       Error **errp)
>  {
>      g_autoptr(MigrationChannel) val = g_new0(MigrationChannel, 1);
>      g_autoptr(MigrationAddress) addr = g_new0(MigrationAddress, 1);
> diff --git a/migration/migration.h b/migration/migration.h
> index b7c8b67542..a8268394ca 100644
> --- a/migration/migration.h
> +++ b/migration/migration.h
> @@ -501,7 +501,8 @@ bool check_dirty_bitmap_mig_alias_map(const BitmapMigrationNodeAliasList *bbm,
>                                        Error **errp);
>  
>  void migrate_add_address(SocketAddress *address);
> -
> +bool migrate_uri_parse(const char *uri, MigrationChannel **channel,
> +                       Error **errp);
>  int foreach_not_ignored_block(RAMBlockIterFunc func, void *opaque);
>  
>  #define qemu_ram_foreach_block \
> -- 
> 2.22.3
> 

With regards,
Daniel
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