diff options
Diffstat (limited to 'drivers/scsi/libiscsi.c')
| -rw-r--r-- | drivers/scsi/libiscsi.c | 187 |
1 files changed, 186 insertions, 1 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 2673a11a9495..7e6e031cc41b 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -1287,13 +1287,18 @@ iscsi_session_setup(struct iscsi_transport *iscsit, if (scsi_add_host(shost, NULL)) goto add_host_fail; + if (!try_module_get(iscsit->owner)) + goto cls_session_fail; + cls_session = iscsi_create_session(shost, iscsit, 0); if (!cls_session) - goto cls_session_fail; + goto module_put; *(unsigned long*)shost->hostdata = (unsigned long)cls_session; return cls_session; +module_put: + module_put(iscsit->owner); cls_session_fail: scsi_remove_host(shost); add_host_fail: @@ -1325,6 +1330,7 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session) iscsi_destroy_session(cls_session); scsi_host_put(shost); + module_put(cls_session->transport->owner); } EXPORT_SYMBOL_GPL(iscsi_session_teardown); @@ -1697,6 +1703,185 @@ int iscsi_conn_bind(struct iscsi_cls_session *cls_session, } EXPORT_SYMBOL_GPL(iscsi_conn_bind); + +int iscsi_set_param(struct iscsi_cls_conn *cls_conn, + enum iscsi_param param, char *buf, int buflen) +{ + struct iscsi_conn *conn = cls_conn->dd_data; + struct iscsi_session *session = conn->session; + uint32_t value; + + switch(param) { + case ISCSI_PARAM_MAX_RECV_DLENGTH: + sscanf(buf, "%d", &conn->max_recv_dlength); + break; + case ISCSI_PARAM_MAX_XMIT_DLENGTH: + sscanf(buf, "%d", &conn->max_xmit_dlength); + break; + case ISCSI_PARAM_HDRDGST_EN: + sscanf(buf, "%d", &conn->hdrdgst_en); + break; + case ISCSI_PARAM_DATADGST_EN: + sscanf(buf, "%d", &conn->datadgst_en); + break; + case ISCSI_PARAM_INITIAL_R2T_EN: + sscanf(buf, "%d", &session->initial_r2t_en); + break; + case ISCSI_PARAM_MAX_R2T: + sscanf(buf, "%d", &session->max_r2t); + break; + case ISCSI_PARAM_IMM_DATA_EN: + sscanf(buf, "%d", &session->imm_data_en); + break; + case ISCSI_PARAM_FIRST_BURST: + sscanf(buf, "%d", &session->first_burst); + break; + case ISCSI_PARAM_MAX_BURST: + sscanf(buf, "%d", &session->max_burst); + break; + case ISCSI_PARAM_PDU_INORDER_EN: + sscanf(buf, "%d", &session->pdu_inorder_en); + break; + case ISCSI_PARAM_DATASEQ_INORDER_EN: + sscanf(buf, "%d", &session->dataseq_inorder_en); + break; + case ISCSI_PARAM_ERL: + sscanf(buf, "%d", &session->erl); + break; + case ISCSI_PARAM_IFMARKER_EN: + sscanf(buf, "%d", &value); + BUG_ON(value); + break; + case ISCSI_PARAM_OFMARKER_EN: + sscanf(buf, "%d", &value); + BUG_ON(value); + break; + case ISCSI_PARAM_EXP_STATSN: + sscanf(buf, "%u", &conn->exp_statsn); + break; + case ISCSI_PARAM_TARGET_NAME: + /* this should not change between logins */ + if (session->targetname) + break; + + session->targetname = kstrdup(buf, GFP_KERNEL); + if (!session->targetname) + return -ENOMEM; + break; + case ISCSI_PARAM_TPGT: + sscanf(buf, "%d", &session->tpgt); + break; + case ISCSI_PARAM_PERSISTENT_PORT: + sscanf(buf, "%d", &conn->persistent_port); + break; + case ISCSI_PARAM_PERSISTENT_ADDRESS: + /* + * this is the address returned in discovery so it should + * not change between logins. + */ + if (conn->persistent_address) + break; + + conn->persistent_address = kstrdup(buf, GFP_KERNEL); + if (!conn->persistent_address) + return -ENOMEM; + break; + default: + return -ENOSYS; + } + + return 0; +} +EXPORT_SYMBOL_GPL(iscsi_set_param); + +int iscsi_session_get_param(struct iscsi_cls_session *cls_session, + enum iscsi_param param, char *buf) +{ + struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); + struct iscsi_session *session = iscsi_hostdata(shost->hostdata); + int len; + + switch(param) { + case ISCSI_PARAM_INITIAL_R2T_EN: + len = sprintf(buf, "%d\n", session->initial_r2t_en); + break; + case ISCSI_PARAM_MAX_R2T: + len = sprintf(buf, "%hu\n", session->max_r2t); + break; + case ISCSI_PARAM_IMM_DATA_EN: + len = sprintf(buf, "%d\n", session->imm_data_en); + break; + case ISCSI_PARAM_FIRST_BURST: + len = sprintf(buf, "%u\n", session->first_burst); + break; + case ISCSI_PARAM_MAX_BURST: + len = sprintf(buf, "%u\n", session->max_burst); + break; + case ISCSI_PARAM_PDU_INORDER_EN: + len = sprintf(buf, "%d\n", session->pdu_inorder_en); + break; + case ISCSI_PARAM_DATASEQ_INORDER_EN: + len = sprintf(buf, "%d\n", session->dataseq_inorder_en); + break; + case ISCSI_PARAM_ERL: + len = sprintf(buf, "%d\n", session->erl); + break; + case ISCSI_PARAM_TARGET_NAME: + len = sprintf(buf, "%s\n", session->targetname); + break; + case ISCSI_PARAM_TPGT: + len = sprintf(buf, "%d\n", session->tpgt); + break; + default: + return -ENOSYS; + } + + return len; +} +EXPORT_SYMBOL_GPL(iscsi_session_get_param); + +int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, + enum iscsi_param param, char *buf) +{ + struct iscsi_conn *conn = cls_conn->dd_data; + int len; + + switch(param) { + case ISCSI_PARAM_MAX_RECV_DLENGTH: + len = sprintf(buf, "%u\n", conn->max_recv_dlength); + break; + case ISCSI_PARAM_MAX_XMIT_DLENGTH: + len = sprintf(buf, "%u\n", conn->max_xmit_dlength); + break; + case ISCSI_PARAM_HDRDGST_EN: + len = sprintf(buf, "%d\n", conn->hdrdgst_en); + break; + case ISCSI_PARAM_DATADGST_EN: + len = sprintf(buf, "%d\n", conn->datadgst_en); + break; + case ISCSI_PARAM_IFMARKER_EN: + len = sprintf(buf, "%d\n", conn->ifmarker_en); + break; + case ISCSI_PARAM_OFMARKER_EN: + len = sprintf(buf, "%d\n", conn->ofmarker_en); + break; + case ISCSI_PARAM_EXP_STATSN: + len = sprintf(buf, "%u\n", conn->exp_statsn); + break; + case ISCSI_PARAM_PERSISTENT_PORT: + len = sprintf(buf, "%d\n", conn->persistent_port); + break; + case ISCSI_PARAM_PERSISTENT_ADDRESS: + len = sprintf(buf, "%s\n", conn->persistent_address); + break; + default: + return -ENOSYS; + } + + return len; +} +EXPORT_SYMBOL_GPL(iscsi_conn_get_param); + MODULE_AUTHOR("Mike Christie"); MODULE_DESCRIPTION("iSCSI library functions"); MODULE_LICENSE("GPL"); |