Re: [PATCH infiniband-diags] Close additional file descriptor in iblinkinfo in advance

["ira.weiny" <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

On Mon, May 11, 2015 at 02:38:41PM -0400, Hal Rosenstock wrote:
> From: Vladimir Koushnir <vladimirk-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> Date: Tue, 14 Apr 2015 18:14:48 +0300
> 
> Additional file descriptor for SMP MADs should be closed before running
> ibnd_discover_fabric() to avoid parallel usage of two SMP file descriptors
> 
> Signed-off-by: Vladimir Koushnir <vladimirk-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> Signed-off-by: Hal Rosenstock <hal-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> ---
>  src/iblinkinfo.c |   16 ++++++++++------
>  1 files changed, 10 insertions(+), 6 deletions(-)
> 
> diff --git a/src/iblinkinfo.c b/src/iblinkinfo.c
> index 92ff3c6..9dcf698 100644
> --- a/src/iblinkinfo.c
> +++ b/src/iblinkinfo.c
> @@ -594,6 +594,7 @@ int main(int argc, char **argv)
>  	ibnd_fabric_t *diff_fabric = NULL;
>  	struct ibmad_port *ibmad_port;
>  	ib_portid_t port_id = { 0 };
> +	uint8_t ni[IB_SMP_DATA_SIZE] = { 0 };
>  	int mgmt_classes[3] =
>  	    { IB_SMI_CLASS, IB_SMI_DIRECT_CLASS, IB_SA_CLASS };
>  
> @@ -653,12 +654,20 @@ int main(int argc, char **argv)
>  		config.timeout_ms = ibd_timeout;
>  	}
>  
> +	if (!smp_query_via(ni, &port_id, IB_ATTR_NODE_INFO, 0,
> +				   ibd_timeout, ibmad_port)){
> +			mad_rpc_close_port(ibmad_port);
> +			fprintf(stderr,
> +				"Failed to get local Node Info\n");
> +			exit(1);
> +	}

You can't do this here.  This results in the Node Info being incorrect for a
partial fabric DR query.  For example,

[root@phcppriv12 sbin]# ./iblinkinfo -D 0,1,1
Failed to find port: 0,1,1

Please fix the DR query,
Ira

>  	config.flags = ibd_ibnetdisc_flags;
>  	config.mkey = ibd_mkey;
>  
>  	node_name_map = open_node_name_map(node_name_map_file);
>  
>  	if (dr_path && load_cache_file) {
> +		mad_rpc_close_port(ibmad_port);
>  		fprintf(stderr, "Cannot specify cache and direct route path\n");
>  		exit(1);
>  	}
> @@ -678,6 +687,7 @@ int main(int argc, char **argv)
>  			IBWARN("Failed to resolve %s; attempting full scan\n",
>  			       guid_str);
>  	}
> +	mad_rpc_close_port(ibmad_port);
>  
>  	if (diff_cache_file &&
>  	    !(diff_fabric = ibnd_load_fabric(diff_cache_file, 0)))
> @@ -723,11 +733,6 @@ int main(int argc, char **argv)
>  			fprintf(stderr, "Failed to find port: %s\n", guid_str);
>  	} else if (!all && dr_path) {
>  		ibnd_port_t *p = NULL;
> -		uint8_t ni[IB_SMP_DATA_SIZE] = { 0 };
> -
> -		if (!smp_query_via(ni, &port_id, IB_ATTR_NODE_INFO, 0,
> -				   ibd_timeout, ibmad_port))
> -			return -1;
>  		mad_decode_field(ni, IB_NODE_PORT_GUID_F, &(guid));
>  
>  		p = ibnd_find_port_guid(fabric, guid);
> @@ -758,6 +763,5 @@ int main(int argc, char **argv)
>  
>  close_port:
>  	close_node_name_map(node_name_map);
> -	mad_rpc_close_port(ibmad_port);
>  	exit(rc);
>  }
> -- 
> 1.7.8.2
> 
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