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[infiniband] Allow MAD handlers to indicate response via return value
Now that MAD handlers no longer return a status code, we can allow them to return a pointer to a MAD structure if and only if they want to send a response. This provides a more natural and flexible approach than using a "response method" field within the handler's descriptor.
This commit is contained in:
parent
94876f4bb6
commit
773028d34e
@ -26,20 +26,15 @@ struct ib_gma_handler {
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uint8_t class_version;
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/** Method */
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uint8_t method;
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/** Response method, or zero */
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uint8_t resp_method;
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/** Attribute (in network byte order) */
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uint16_t attr_id;
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/** Handle attribute
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*
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* @v gma General management agent
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* @v mad MAD
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*
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* The handler should modify the MAD as applicable. If the
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* handler returns with a non-zero value in the MAD's @c
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* method field, it will be sent as a response.
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* @v gma General management agent
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* @v mad MAD
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* @ret response MAD response, or NULL to send no response
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*/
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void ( * handle ) ( struct ib_gma *gma, union ib_mad *mad );
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union ib_mad * ( * handle ) ( struct ib_gma *gma, union ib_mad *mad );
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};
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/** GMA attribute handlers */
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@ -81,14 +81,48 @@ static unsigned int next_request_tid;
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*****************************************************************************
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*/
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/**
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* Construct directed route response, if necessary
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*
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* @v gma General management agent
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* @v mad MAD response without DR fields filled in
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* @ret mad MAD response with DR fields filled in
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*/
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static union ib_mad * ib_sma_dr_response ( struct ib_gma *gma,
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union ib_mad *mad ) {
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struct ib_mad_hdr *hdr = &mad->hdr;
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struct ib_mad_smp *smp = &mad->smp;
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unsigned int hop_pointer;
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unsigned int hop_count;
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/* Set response fields for directed route SMPs */
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if ( hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ) {
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hdr->status |= htons ( IB_SMP_STATUS_D_INBOUND );
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hop_pointer = smp->mad_hdr.class_specific.smp.hop_pointer;
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hop_count = smp->mad_hdr.class_specific.smp.hop_count;
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assert ( hop_count == hop_pointer );
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if ( hop_pointer < ( sizeof ( smp->return_path.hops ) /
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sizeof ( smp->return_path.hops[0] ) ) ) {
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smp->return_path.hops[hop_pointer] = gma->ibdev->port;
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} else {
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DBGC ( gma, "GMA %p invalid hop pointer %d\n",
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gma, hop_pointer );
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return NULL;
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}
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}
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return mad;
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}
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/**
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* Get node information
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*
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* @v gma General management agent
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* @v mad MAD
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* @ret response MAD response
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*/
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static void ib_sma_get_node_info ( struct ib_gma *gma,
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union ib_mad *mad ) {
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static union ib_mad * ib_sma_get_node_info ( struct ib_gma *gma,
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union ib_mad *mad ) {
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struct ib_device *ibdev = gma->ibdev;
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struct ib_node_info *node_info = &mad->smp.smp_data.node_info;
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@ -103,6 +137,9 @@ static void ib_sma_get_node_info ( struct ib_gma *gma,
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sizeof ( node_info->port_guid ) );
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node_info->partition_cap = htons ( 1 );
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node_info->local_port_num = ibdev->port;
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mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
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return ib_sma_dr_response ( gma, mad );
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}
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/**
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@ -110,9 +147,10 @@ static void ib_sma_get_node_info ( struct ib_gma *gma,
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*
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* @v gma General management agent
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* @v mad MAD
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* @ret response MAD response
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*/
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static void ib_sma_get_node_desc ( struct ib_gma *gma,
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union ib_mad *mad ) {
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static union ib_mad * ib_sma_get_node_desc ( struct ib_gma *gma,
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union ib_mad *mad ) {
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struct ib_device *ibdev = gma->ibdev;
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struct ib_node_desc *node_desc = &mad->smp.smp_data.node_desc;
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struct ib_gid_half *guid = &ibdev->gid.u.half[1];
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@ -123,6 +161,9 @@ static void ib_sma_get_node_desc ( struct ib_gma *gma,
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guid->bytes[0], guid->bytes[1], guid->bytes[2],
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guid->bytes[3], guid->bytes[4], guid->bytes[5],
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guid->bytes[6], guid->bytes[7], ibdev->dev->name );
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mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
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return ib_sma_dr_response ( gma, mad );
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}
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/**
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@ -130,15 +171,19 @@ static void ib_sma_get_node_desc ( struct ib_gma *gma,
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*
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* @v gma General management agent
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* @v mad MAD
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* @ret response MAD response
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*/
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static void ib_sma_get_guid_info ( struct ib_gma *gma,
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union ib_mad *mad ) {
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static union ib_mad * ib_sma_get_guid_info ( struct ib_gma *gma,
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union ib_mad *mad ) {
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struct ib_device *ibdev = gma->ibdev;
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struct ib_guid_info *guid_info = &mad->smp.smp_data.guid_info;
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memset ( guid_info, 0, sizeof ( *guid_info ) );
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memcpy ( guid_info->guid[0], &ibdev->gid.u.half[1],
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sizeof ( guid_info->guid[0] ) );
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mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
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return ib_sma_dr_response ( gma, mad );
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}
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/**
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@ -146,9 +191,10 @@ static void ib_sma_get_guid_info ( struct ib_gma *gma,
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*
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* @v gma General management agent
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* @v mad MAD
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* @ret response MAD response
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*/
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static void ib_sma_get_port_info ( struct ib_gma *gma,
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union ib_mad *mad ) {
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static union ib_mad * ib_sma_get_port_info ( struct ib_gma *gma,
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union ib_mad *mad ) {
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struct ib_device *ibdev = gma->ibdev;
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struct ib_port_info *port_info = &mad->smp.smp_data.port_info;
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@ -174,6 +220,9 @@ static void ib_sma_get_port_info ( struct ib_gma *gma,
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port_info->init_type_reply__mtu_cap = IB_MTU_2048;
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port_info->operational_vls__enforcement = ( IB_VL_0 << 4 );
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port_info->guid_cap = 1;
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mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
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return ib_sma_dr_response ( gma, mad );
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}
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/**
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@ -181,9 +230,10 @@ static void ib_sma_get_port_info ( struct ib_gma *gma,
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*
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* @v gma General management agent
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* @v mad MAD
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* @ret response MAD response
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*/
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static void ib_sma_set_port_info ( struct ib_gma *gma,
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union ib_mad *mad ) {
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static union ib_mad * ib_sma_set_port_info ( struct ib_gma *gma,
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union ib_mad *mad ) {
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struct ib_device *ibdev = gma->ibdev;
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const struct ib_port_info *port_info = &mad->smp.smp_data.port_info;
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int rc;
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@ -201,7 +251,7 @@ static void ib_sma_set_port_info ( struct ib_gma *gma,
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htons ( IB_MGMT_STATUS_UNSUPPORTED_METHOD_ATTR );
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}
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ib_sma_get_port_info ( gma, mad );
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return ib_sma_get_port_info ( gma, mad );
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}
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/**
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@ -209,14 +259,19 @@ static void ib_sma_set_port_info ( struct ib_gma *gma,
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*
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* @v gma General management agent
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* @v mad MAD
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* @ret response MAD response
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*/
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static void ib_sma_get_pkey_table ( struct ib_gma *gma,
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union ib_mad *mad ) {
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static union ib_mad * ib_sma_get_pkey_table ( struct ib_gma *gma,
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union ib_mad *mad ) {
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struct ib_device *ibdev = gma->ibdev;
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struct ib_pkey_table *pkey_table = &mad->smp.smp_data.pkey_table;
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mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
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memset ( pkey_table, 0, sizeof ( *pkey_table ) );
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pkey_table->pkey[0] = htons ( ibdev->pkey );
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mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
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return ib_sma_dr_response ( gma, mad );
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}
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/**
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@ -224,15 +279,16 @@ static void ib_sma_get_pkey_table ( struct ib_gma *gma,
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*
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* @v gma General management agent
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* @v mad MAD
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* @ret response MAD response
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*/
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static void ib_sma_set_pkey_table ( struct ib_gma *gma,
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union ib_mad *mad ) {
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static union ib_mad * ib_sma_set_pkey_table ( struct ib_gma *gma,
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union ib_mad *mad ) {
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struct ib_device *ibdev = gma->ibdev;
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struct ib_pkey_table *pkey_table = &mad->smp.smp_data.pkey_table;
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ibdev->pkey = ntohs ( pkey_table->pkey[0] );
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ib_sma_get_pkey_table ( gma, mad );
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return ib_sma_get_pkey_table ( gma, mad );
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}
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/** List of attribute handlers */
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@ -242,7 +298,6 @@ struct ib_gma_handler ib_sma_handlers[] __ib_gma_handler = {
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.mgmt_class_ignore = IB_SMP_CLASS_IGNORE,
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.class_version = IB_SMP_CLASS_VERSION,
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.method = IB_MGMT_METHOD_GET,
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.resp_method = IB_MGMT_METHOD_GET_RESP,
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.attr_id = htons ( IB_SMP_ATTR_NODE_INFO ),
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.handle = ib_sma_get_node_info,
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},
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@ -251,7 +306,6 @@ struct ib_gma_handler ib_sma_handlers[] __ib_gma_handler = {
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.mgmt_class_ignore = IB_SMP_CLASS_IGNORE,
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.class_version = IB_SMP_CLASS_VERSION,
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.method = IB_MGMT_METHOD_GET,
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.resp_method = IB_MGMT_METHOD_GET_RESP,
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.attr_id = htons ( IB_SMP_ATTR_NODE_DESC ),
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.handle = ib_sma_get_node_desc,
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},
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@ -260,7 +314,6 @@ struct ib_gma_handler ib_sma_handlers[] __ib_gma_handler = {
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.mgmt_class_ignore = IB_SMP_CLASS_IGNORE,
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.class_version = IB_SMP_CLASS_VERSION,
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.method = IB_MGMT_METHOD_GET,
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.resp_method = IB_MGMT_METHOD_GET_RESP,
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.attr_id = htons ( IB_SMP_ATTR_GUID_INFO ),
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.handle = ib_sma_get_guid_info,
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},
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@ -269,7 +322,6 @@ struct ib_gma_handler ib_sma_handlers[] __ib_gma_handler = {
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.mgmt_class_ignore = IB_SMP_CLASS_IGNORE,
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.class_version = IB_SMP_CLASS_VERSION,
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.method = IB_MGMT_METHOD_GET,
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.resp_method = IB_MGMT_METHOD_GET_RESP,
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.attr_id = htons ( IB_SMP_ATTR_PORT_INFO ),
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.handle = ib_sma_get_port_info,
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},
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@ -278,7 +330,6 @@ struct ib_gma_handler ib_sma_handlers[] __ib_gma_handler = {
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.mgmt_class_ignore = IB_SMP_CLASS_IGNORE,
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.class_version = IB_SMP_CLASS_VERSION,
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.method = IB_MGMT_METHOD_SET,
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.resp_method = IB_MGMT_METHOD_GET_RESP,
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.attr_id = htons ( IB_SMP_ATTR_PORT_INFO ),
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.handle = ib_sma_set_port_info,
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},
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@ -287,7 +338,6 @@ struct ib_gma_handler ib_sma_handlers[] __ib_gma_handler = {
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.mgmt_class_ignore = IB_SMP_CLASS_IGNORE,
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.class_version = IB_SMP_CLASS_VERSION,
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.method = IB_MGMT_METHOD_GET,
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.resp_method = IB_MGMT_METHOD_GET_RESP,
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.attr_id = htons ( IB_SMP_ATTR_PKEY_TABLE ),
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.handle = ib_sma_get_pkey_table,
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},
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@ -296,7 +346,6 @@ struct ib_gma_handler ib_sma_handlers[] __ib_gma_handler = {
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.mgmt_class_ignore = IB_SMP_CLASS_IGNORE,
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.class_version = IB_SMP_CLASS_VERSION,
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.method = IB_MGMT_METHOD_SET,
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.resp_method = IB_MGMT_METHOD_GET_RESP,
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.attr_id = htons ( IB_SMP_ATTR_PKEY_TABLE ),
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.handle = ib_sma_set_pkey_table,
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},
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@ -314,8 +363,9 @@ struct ib_gma_handler ib_sma_handlers[] __ib_gma_handler = {
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*
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* @v gma General management agent
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* @v mad MAD
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* @ret mad MAD response
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*/
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static void ib_handle_mad ( struct ib_gma *gma, union ib_mad *mad ) {
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static union ib_mad * ib_handle_mad ( struct ib_gma *gma, union ib_mad *mad ) {
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struct ib_mad_hdr *hdr = &mad->hdr;
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struct ib_gma_handler *handler;
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@ -325,14 +375,13 @@ static void ib_handle_mad ( struct ib_gma *gma, union ib_mad *mad ) {
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( handler->class_version == hdr->class_version ) &&
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( handler->method == hdr->method ) &&
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( handler->attr_id == hdr->attr_id ) ) {
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hdr->method = handler->resp_method;
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handler->handle ( gma, mad );
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return;
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return handler->handle ( gma, mad );
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}
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}
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hdr->method = IB_MGMT_METHOD_TRAP;
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hdr->status = htons ( IB_MGMT_STATUS_UNSUPPORTED_METHOD_ATTR );
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return mad;
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}
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/**
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@ -353,8 +402,7 @@ static void ib_gma_complete_recv ( struct ib_device *ibdev,
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struct ib_mad_request *request;
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union ib_mad *mad;
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struct ib_mad_hdr *hdr;
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unsigned int hop_pointer;
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unsigned int hop_count;
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union ib_mad *response;
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/* Ignore errors */
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if ( rc != 0 ) {
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@ -395,36 +443,17 @@ static void ib_gma_complete_recv ( struct ib_device *ibdev,
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}
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/* Handle MAD */
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ib_handle_mad ( gma, mad );
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/* Finish processing if we have no response to send */
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if ( ! hdr->method )
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if ( ( response = ib_handle_mad ( gma, mad ) ) == NULL )
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goto out;
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/* Re-use I/O buffer for response */
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memcpy ( mad, response, sizeof ( *mad ) );
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DBGC ( gma, "GMA %p TX TID %08x%08x (%02x,%02x,%02x,%04x) status "
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"%04x\n", gma, ntohl ( hdr->tid[0] ), ntohl ( hdr->tid[1] ),
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hdr->mgmt_class, hdr->class_version, hdr->method,
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ntohs ( hdr->attr_id ), ntohs ( hdr->status ) );
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DBGC2_HDA ( gma, 0, mad, sizeof ( *mad ) );
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/* Set response fields for directed route SMPs */
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if ( hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ) {
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struct ib_mad_smp *smp = &mad->smp;
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hdr->status |= htons ( IB_SMP_STATUS_D_INBOUND );
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hop_pointer = smp->mad_hdr.class_specific.smp.hop_pointer;
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hop_count = smp->mad_hdr.class_specific.smp.hop_count;
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assert ( hop_count == hop_pointer );
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if ( hop_pointer < ( sizeof ( smp->return_path.hops ) /
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sizeof ( smp->return_path.hops[0] ) ) ) {
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smp->return_path.hops[hop_pointer] = ibdev->port;
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} else {
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DBGC ( gma, "GMA %p invalid hop pointer %d\n",
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gma, hop_pointer );
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goto out;
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}
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}
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/* Send MAD response, if applicable */
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if ( ( rc = ib_post_send ( ibdev, qp, av,
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iob_disown ( iobuf ) ) ) != 0 ) {
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@ -139,9 +139,10 @@ void ib_mcast_leave ( struct ib_device *ibdev, struct ib_queue_pair *qp,
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*
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* @v gma General management agent
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* @v mad MAD
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* @ret mad MAD response
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*/
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static void ib_handle_mc_member_join ( struct ib_gma *gma,
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union ib_mad *mad ) {
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static union ib_mad * ib_handle_mc_member_join ( struct ib_gma *gma,
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union ib_mad *mad ) {
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struct ib_device *ibdev = gma->ibdev;
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struct ib_mc_member_record *mc_member_record =
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&mad->sa.sa_data.mc_member_record;
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@ -154,7 +155,7 @@ static void ib_handle_mc_member_join ( struct ib_gma *gma,
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if ( mad->hdr.status != htons ( IB_MGMT_STATUS_OK ) ) {
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DBGC ( gma, "GMA %p join failed with status %04x\n",
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gma, ntohs ( mad->hdr.status ) );
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return;
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return NULL;
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}
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/* Extract MAD parameters */
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@ -169,7 +170,7 @@ static void ib_handle_mc_member_join ( struct ib_gma *gma,
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ntohl ( gid->u.dwords[1] ),
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ntohl ( gid->u.dwords[2] ),
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ntohl ( gid->u.dwords[3] ) );
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return;
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return NULL;
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}
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DBGC ( gma, "GMA %p QPN %lx joined %08x:%08x:%08x:%08x qkey %lx\n",
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gma, qp->qpn, ntohl ( gid->u.dwords[0] ),
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@ -180,8 +181,10 @@ static void ib_handle_mc_member_join ( struct ib_gma *gma,
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if ( ( rc = ib_modify_qp ( ibdev, qp, IB_MODIFY_QKEY, qkey ) ) != 0 ) {
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DBGC ( gma, "GMA %p QPN %lx could not modify qkey: %s\n",
|
||||
gma, qp->qpn, strerror ( rc ) );
|
||||
return;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
@ -189,9 +192,10 @@ static void ib_handle_mc_member_join ( struct ib_gma *gma,
|
||||
*
|
||||
* @v gma General management agent
|
||||
* @v mad MAD
|
||||
* @v response MAD response
|
||||
*/
|
||||
static void ib_handle_mc_member_leave ( struct ib_gma *gma,
|
||||
union ib_mad *mad ) {
|
||||
static union ib_mad * ib_handle_mc_member_leave ( struct ib_gma *gma,
|
||||
union ib_mad *mad ) {
|
||||
struct ib_mc_member_record *mc_member_record =
|
||||
&mad->sa.sa_data.mc_member_record;
|
||||
struct ib_gid *gid;
|
||||
@ -200,7 +204,7 @@ static void ib_handle_mc_member_leave ( struct ib_gma *gma,
|
||||
if ( mad->hdr.status != htons ( IB_MGMT_STATUS_OK ) ) {
|
||||
DBGC ( gma, "GMA %p leave failed with status %04x\n",
|
||||
gma, ntohs ( mad->hdr.status ) );
|
||||
return;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Extract MAD parameters */
|
||||
@ -208,6 +212,8 @@ static void ib_handle_mc_member_leave ( struct ib_gma *gma,
|
||||
DBGC ( gma, "GMA %p left %08x:%08x:%08x:%08x\n", gma,
|
||||
ntohl ( gid->u.dwords[0] ), ntohl ( gid->u.dwords[1] ),
|
||||
ntohl ( gid->u.dwords[2] ), ntohl ( gid->u.dwords[3] ) );
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/** Multicast membership record response handler */
|
||||
|
@ -170,9 +170,10 @@ int ib_resolve_path ( struct ib_device *ibdev,
|
||||
*
|
||||
* @v gma General management agent
|
||||
* @v mad MAD
|
||||
* @ret response MAD response
|
||||
*/
|
||||
static void ib_handle_path_record ( struct ib_gma *gma,
|
||||
union ib_mad *mad ) {
|
||||
static union ib_mad * ib_handle_path_record ( struct ib_gma *gma,
|
||||
union ib_mad *mad ) {
|
||||
struct ib_device *ibdev = gma->ibdev;
|
||||
struct ib_path_record *path_record = &mad->sa.sa_data.path_record;
|
||||
struct ib_gid *dgid = &path_record->dgid;
|
||||
@ -185,7 +186,7 @@ static void ib_handle_path_record ( struct ib_gma *gma,
|
||||
if ( mad->hdr.status != htons ( IB_MGMT_STATUS_OK ) ) {
|
||||
DBGC ( gma, "GMA %p path record lookup failed with status "
|
||||
"%04x\n", gma, ntohs ( mad->hdr.status ) );
|
||||
return;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Extract values from MAD */
|
||||
@ -208,6 +209,8 @@ static void ib_handle_path_record ( struct ib_gma *gma,
|
||||
cached->rate = rate;
|
||||
cached->sl = sl;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/** Path record response handler */
|
||||
|
Loading…
x
Reference in New Issue
Block a user