Re: [PATCH v2] migration/rdma: set the REUSEADDR option for destination

[Pankaj Gupta]

> We hit following error during testing RDMA transport:
> in case of migration error, mgmt daemon pick one migration port,
> incoming rdma:[::]:8089: RDMA ERROR: Error: could not rdma_bind_addr
>
> Then try another -incoming rdma:[::]:8103, sometime it worked,
> sometimes need another try with other ports number.
>
> Set the REUSEADDR option for destination, This allow address could
> be reused to avoid rdma_bind_addr error out.
>
> Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
> ---
> v2: extend commit message as discussed with Pankaj and David
> ---
>  migration/rdma.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/migration/rdma.c b/migration/rdma.c
> index c7c7a384875b..663e1fbb096d 100644
> --- a/migration/rdma.c
> +++ b/migration/rdma.c
> @@ -2705,6 +2705,7 @@ static int qemu_rdma_dest_init(RDMAContext *rdma, Error 
> **errp)
>      char ip[40] = "unknown";
>      struct rdma_addrinfo *res, *e;
>      char port_str[16];
> +    int reuse = 1;
>
>      for (idx = 0; idx < RDMA_WRID_MAX; idx++) {
>          rdma->wr_data[idx].control_len = 0;
> @@ -2740,6 +2741,12 @@ static int qemu_rdma_dest_init(RDMAContext *rdma, 
> Error **errp)
>          goto err_dest_init_bind_addr;
>      }
>
> +    ret = rdma_set_option(listen_id, RDMA_OPTION_ID, 
> RDMA_OPTION_ID_REUSEADDR,
> +                         &reuse, sizeof reuse);
> +    if (ret) {
> +        ERROR(errp, "Error: could not set REUSEADDR option");
> +        goto err_dest_init_bind_addr;
> +    }
>      for (e = res; e != NULL; e = e->ai_next) {
>          inet_ntop(e->ai_family,
>              &((struct sockaddr_in *) e->ai_dst_addr)->sin_addr, ip, sizeof 
> ip);

Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com